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Homemade concrete mixer from a barrel. Homemade manual concrete mixer from a metal barrel. Video - Manual concrete mixer with a cylindrical bucket

On present stage development construction technologies, not a single building can do without the use of such a device as a concrete mixer.

Concrete is the main element of both large-scale construction and local construction. Summer cottages simply cannot do without a concrete mixer, since with its help you can always correct construction errors or simply strengthen a well or other garden structures.

Of course, no one canceled the option of mixing concrete with a conventional shovel. But it is too laborious, besides, it allows mixing only small volumes of concrete.

The expenditure of time and energy is enormous. In addition, concrete stagnates quickly enough, so often mixing concrete with a shovel can turn into a completely useless undertaking.

The building materials market is replete with ready-made concrete mixers, which in most cases are not affordable for ordinary summer residents.

A do-it-yourself homemade concrete mixer comes to the rescue.

Detailed instructions and a visual aid will be presented below.

Done - the pride and joy of any summer resident. Instructions and possible options in our website.

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Drawings and designs of homemade concrete mixers

First of all, for a concrete mixer, it is necessary to prepare containers of such dimensions that will be appropriate for your types of work.

Do not choose small containers. In them, the concrete will quickly stagnate, and if the amount of recycled material is not enough for you, you will need to knead it again. The most acceptable container volume is 200 liters.

The next step is to cut out the bottom of a medium size in your future concrete mixer.

Please note that any concrete mixer must be durable and stable. It is recommended to take the most responsible approach to manufacturing, since any inaccuracies will immediately lead to a breakdown of the structure.

In the event that the expected volume of work of the concrete mixer is not very large, then its frame may well be wooden.

The average size of a beam can be from 10x10 to 20x20, no more and no less.

It is important that the connection of the parts in the frame should be based on the tenon principle. In addition, it must necessarily be smeared with glue and planted on self-tapping screws.

This design guarantees a long service life of the concrete mixer.

The frame for the concrete mixer must be metal. In order to design it, stock up on a corner in advance small size. A channel is also suitable for his responsibility. Nuts, rivets, or even welding will help you fold the structure.

As for the engine, homemade concrete mixers often use a motor from old cars or scooters. Again, if production volumes are negligible.

The motor from the old washing machine will also come in handy. Its advantage is that it can work for a long time without burning out.

Drawings of homemade concrete mixers in the photo gallery.

During the mixing of concrete, the torsion moment of concrete is important. The motor from the washing machine was originally designed for this, therefore it is able to withstand any load.

For a concrete mixer, a small number of revolutions is suitable - 25 revolutions per minute.

In order to provide this amount, reducers are needed. It is important that they are of different schemes. The most primitive gearbox is the one that consists of a pulley and a belt.

Alternatively, this is a concrete mixer with a motor from an old moped or, as mentioned earlier, a scooter. Its advantage is that this option is very compact and mobile, since it does not require electricity to operate. Even on a large plot of the garden, it can be moved and transported without unnecessary hassle and inconvenience.

But as for the gearbox, it, of course, must be chain. Otherwise, such a design simply will not work.

The video describes in detail and shows how a concrete mixer is made with your own hands with drawings and visual aid for manufacturing.

A homemade concrete mixer from a barrel is one of the simplest DIY designs. But at the same time, it is able to mix concrete very well and, moreover, for a fairly long time.

In order to start using it, you do not need either gasoline or electricity.

Drawing of a concrete mixer from a barrel

Basically you need to find the right barrel. Pay attention to the fact that there are no holes in it and there is no rust.

The barrel must have a solid bottom and a good lid. If one of these components is missing, then you will have to weld it or fix it in some other way.

Next, on both sides you need to fix the flanges with bearings and after that cut a small hole from one side of the barrel. Secure the cut hole with hinges so that you can open and close this hatch at any time.

In order to securely attach your structure to the ground, a shaft must be threaded through it. Then, in the previously cut hatch, you can fill in the required ingredients and close the lid tightly. Start the mechanism, and after a while your mixture will be ready.

Please note that the design, which is based on a barrel, is able to mix other working, building materials.

In the video, a concrete mixer from a barrel based on an engine from a washing machine.

As a basis - a washing machine

First of all, it is worth noting that a machine that has a vertical load is best suited.

But even if it doesn't exist, it doesn't matter. If desired, a concrete mixer can be made from absolutely any model. Most importantly, it must necessarily have a container for the activator, which should be replaced immediately.

Reducer for concrete mixer

And in its place, install a shaft that will fit proportionately.

Important condition: and brackets and blades must be strictly symmetrical. The life of this device will largely depend on such a condition.

Please note that the brackets must have one mounting hole. And they must be connected in a perpendicular way.

Each washing machine has drainer different shape. In order not to damage it when mixing concrete, the drain must be fixed or completely changed, and subsequently drowned out.

Pictured is a concrete mixer from a washing machine

A homemade concrete mixer from a washing machine is not suitable for large volumes of work for many reasons. But otherwise, it will be simply irreplaceable.

In addition, it will give your equipment a second life, which, first of all, will save your money.

Common Mistakes

In the process of manufacturing this device, a number of errors may occur that must be foreseen in advance and, if possible, prevented:

1. First, any the container you will use must be of high quality. Check in advance for holes, rust, or other damage.
2. Secondly, follow instructions in detail. Since all deviations will lead to inconsistency in your actions, which means that there is a risk of eventually getting a low-quality concrete mixer.
3. Thirdly, the metal frames that you will need for the concrete mixer, cannot be welded with cast iron. This will only complicate your already difficult work.
4. Fourth, try not to overload your device with excess weight. If you are counting on a small amount of concrete, then do not exceed it.

Any craftsman can always save a decent amount of money if he knows how to make a concrete mixer with his own hands. Plus, it's not that hard to do.

It is enough to have a minimum of building materials, tools, resourcefulness and attention.

In addition, no matter what the concrete mixer is made of, it can serve you for a long time with proper care and proper design.

It is better to start the construction of two or three together. One person will not be able to cope with the amount of work that will need to be done at a time.

When large-scale construction works, not the last question that needs to be decided where to get a mortar mixer - if you mix the mortar manually, then the lost time does not compensate for the savings from not buying a concrete mixer. Some skill in welding and locksmithing and instructions on how to make a concrete mixer with your own hands will help reduce costs.

Basic principles of operation of mortar mixers

According to the principle of operation, a do-it-yourself concrete mixer is no different from industrial analogues - the differences will be only in the materials used and sizes. In addition, it will be easier to repair a concrete mixer with your own hands, since you know the mechanism you made yourself inside and out.

Based on the volume of planned work and the available components, the finished device can mix concrete in a concrete mixer by force, gravity or combined. The latter is used most often due to the ease of manufacture of the device and the high quality of its work.

Forced mixing of the solution

According to this principle, a construction mixer or a drill with a special nozzle operates - a whisk is lowered into the solution and, rotating, mixes its components. But such tools are more suitable for gypsum plasters- sand and cement, especially with the addition of crushed stone, have a much greater weight, so at best you simply won’t get a high-quality mixture, and at worst - when making a mortar, you can burn the drill motor or its gearbox yourself.

For the preparation of concrete, a slightly modified design is used - a shaft passes through the center of the tank, on which blades are mounted, mixing the components of the mixture. Also, frame mixers show good results, which break up the clods of the solution, turning it into a homogeneous mixture. Some builders are convinced that only such an arbolite mixer can prepare an arbolite solution with high quality.

Advantages and disadvantages

This method shows excellent results in production, but before using it at home, you should weigh the pros and cons of the design.

There is only one advantage - such a concrete mixer will produce the most homogeneous solution in the shortest time.

The disadvantages of such a device are much more:

• The complexity of the design. It is necessary to ensure the tightness of the place where the shaft passes through the mixing container. This determines how often the bearing needs to be replaced, which is usually installed in this place. It is also necessary to reduce the "dead zones" that are located near the walls of the tank - the blades or frame must rotate freely, but at the same time pass close enough to the surface so as not to leave unmixed parts of the solution there.
• Need quality parts. The concrete solution is quite heavy in itself, and the addition of crushed stone or other inclusions to it requires additional capacities from the concrete mixer. As a result, to get good concrete mixer, you need to remember or master the basics of strength of materials.
• The design is not designed for the preparation of a solution that includes medium and large fractions of crushed stone or expanded clay - they will simply get stuck between the blades and walls.
• Large power consumption. Again, everything is tied to the density and weight of the concrete in which the blades will rotate. For the same reason, a homemade forced-action concrete mixer must necessarily be with an engine - if you try to rotate the shaft manually, you can use shovels with the same success.

If the quality of the mortar and the speed of its mixing are more important, then a forced concrete mixer with your own hands can be made according to the following schemes.

Details and device

The design consists of the following components:

• Carrying frame. Its execution is individual in each case.
• Drum for a batch, with smooth internal walls.
• working shaft. Frames or blades are attached to it, mixing the solution.
• Electric motor.
• Reduction gear.
• Coupling. Transfers force from the gearbox to the shaft. It can act as a fuse in case of jamming.
• Luke for rashing the finished solution.
• Lever for opening the hatch (or turning the drum).

Do-it-yourself forced-action concrete mixers require special attention to the way in which the prepared mortar will be unloaded. This is a hatch in the bottom of the mixing container or a device for completely turning it over so that the finished mixture is poured out through the loading compartment. Which of the methods is more suitable, it is advisable to decide in advance.

Visually forced concrete mixer in the video:

Gravity mixing

When using this method, the container itself is spinning into which the components of the solution are poured. Mixing occurs due to the constant pouring of sand and cement from top to bottom. The most difficult thing in this design is to ensure that the lid closes tightly so that water does not seep through it.

The most important advantage of the design is its simplicity. Such a do-it-yourself mortar mixer can be made from an ordinary can, even an unnecessary and leaky one will do. Do not drink water from it, so the hole can be closed by any means, and the neck rarely deteriorates and still provides the necessary tightness.

Such devices can also be used during construction in places where there is no electricity - such a home-made concrete mixer made by oneself does not have to be equipped with an electric drive, although its presence will greatly simplify the work.

Working on the same principle, but more common is a homemade concrete mixer from a barrel. It is easier for her to find a container, it is more capacious and mixing the solution allows you to perform more thoroughly. As practice has shown, the solution is better mixed in a barrel fixed in opposite corners.

Details and device

The following components are used:

• Iron barrel of suitable size. Some craftsmen adapt plastic containers for these purposes.
• Frame. There are no restrictions - full scope for imagination. The main thing is that your ready solution it was comfortable to sleep.
• A shaft that supports a container that can support the weight of a barrel of cement.
• Bearings.
• Pen. The longer it is, the easier it is to rotate the shaft.
• Handle.
• Cover for draining the finished solution.
• Clips that hold the lid to the neck.
• Seals.
• Hinges for opening the lid.

How a do-it-yourself concrete mixer from a barrel works is clearly shown in the following video:

Combined concrete mixers

The most common devices - the solution is mixed due to gravitational influence, plus breaking up lumps with blades or pins welded to the body of the barrel. Suitable for making arbolite with your own hands. They require more time to prepare the solution than forced mixers, but have an extensive list of advantages:

• The design is as simple as possible, reliable and unpretentious in operation.
• Less force is generated on the shaft that rotates the barrel, which allows the use of not as powerful electric motors as for forced mixing. As a result - significantly less wear on components.
• It is not required to seal any joints - the solution is mixed inside the barrel, and all the nodes of the mechanism are outside.
• It is possible to mix solutions with any size fractions of crushed stone, expanded clay and other fillers.

The simplest combined manual concrete mixer made by hand from an iron barrel is the same manual concrete mixer, but with blades or combs welded from the inside. If necessary, an electric motor can be connected to it.

Self-manufacturing

A factory-made or do-it-yourself concrete mixer consists of three main components: a bucket in which the mortar is mixed, a frame for attaching the components and a drive - manual or electric (in some cases motors from a moped or scooter are used).

In the video, a home-made tub for combined mixing of the solution is installed on a T-16 tractor:

Solution bucket

First, you need to consider its size, given that it will be loaded by 30-40%. No more, as the solution will splash out and mix poorly.

Secondly, attention should be paid to the shape - it should be pear-shaped. From above, so that water and mortar do not splash out, from below - so that concrete particles do not clog into the corners between the wall and the bottom.

Almost finished tub is a plastic barrel the right sizes- in addition to the fact that it fits in shape, its weight will be an additional plus.

Alternatively, a concrete mixer can be made from a washing machine - if an old Soviet round “washer” is lying around in the attic, then a laundry tank is removed from it, which is specially designed to have liquid spinning inside it. The bottom is strengthened, the top is narrowed and the tank is ready.

If there is nothing suitable, then a pear for a concrete mixer can be made from steel sheet, with a cross section of 2-3 mm. For the bottom, you should take a thicker metal - about 5 mm - the main load from the drive will go to it.

With a diameter of 500 mm and a height of 400, a compact bucket is obtained, in which, nevertheless, 30 liters of solution can be prepared at a time.

The following drawings will tell you more about the design:

It is possible to make a quality pear for a concrete mixer without using the blades. In the diagram shown, instead of them, mortar dividers from 16 mm reinforcing bar are welded inside the tank, which additionally strengthen the structure. This design is an excellent mixer for wood concrete.

Fastening to the shaft occurs through the hub from the car wheel, which is welded or screwed to the bottom. If car parts not lying around in the garage, then the fasteners will have to be made manually according to the drawing.

Carrier frame

In its design, there can be a variety of variations - here absolute freedom actions, the main rule of its manufacture is that it securely holds all the components and gives free access for loading and unloading concrete.

The main differences in engineering are in the method of pouring the finished solution, for which the tub itself is made movable, or the entire frame is designed in a certain way.

For a bucket made of steel sheet, a frame that provides it with an inclination will be optimal. The container itself is connected to the gearbox drive (15), to which the force comes from the engine (17) through the clutch (16).

All this is mounted on a subframe (18) and rotates on a hinge (14). For different types solutions, the working slope of the bucket can be adjusted, for which an eyelet (22) is welded to the subframe, through which a sector (10) passes, held in the desired position by a pin (23).

The main provisions of the sector need at least three:

Slope 50% - for heavy solutions.

Slope 30% - for light mixtures (for example, plaster).

Horizontal position for rinsing the container.

Electric motor and gearbox

Rarely, these parts are bought separately - the easiest way is to use what is at hand. The electric motor is suitable from the washing machine, circuit diagram from the same place, and the gearboxes are assembled from bicycle wheels, belt or chain gears. The closest thing to the factory design is a flywheel welded to the bottom, which spins from the “native” Benedix of an automobile starter mounted on a shaft.

All calculations are made based on the following considerations:

• Engine power is selected according to the ratio of 20 watts per liter of solution.
• The number of revolutions that the gearbox produces for the tub should be in the range of 30-50 per minute. A smaller amount will increase mixing time, and a larger amount will splatter the solution or even cause centrifugal forces, due to which mixing will not occur.

Briefly about the main

manual concrete mixer, assembled with your own hands, this is a completely solvable task for a person who knows how to work with welding machine and skilled in locksmithing.

If a do-it-yourself mixer is made from a barrel, then you can pick up a plastic container that is already completely ready for installation.

When assembling, you need to remember about the power of the engine, optimal amount revolutions and careful centering of the mechanism.

To carry out construction activities and landscaping, cement and concrete mortars are used. The process of manual preparation of mixtures is laborious and lengthy. It does not guarantee the uniformity of the working mixture. And it is not advisable to purchase an expensive concrete mixer for a one-time batch. The way out of this situation is a do-it-yourself concrete mixer. She will allow minimum expenses independently prepare a solution with a homogeneous consistency.

An example of a concrete mixer suitable for the home

The device of a household concrete mixer and the classification of mixers

Units designed for mixing concrete solutions are offered to enterprises and are made by home craftsmen in various versions. Consider the design of the mixer, which consists of the following units:

• a metal frame or bed that combines the nodes into a single structure. The frame perceives dynamic and static loads, ensuring the stability of the equipment. For heavy units, the bed is stationary, and for small-sized mixers it is equipped with wheels that facilitate transportation. For the manufacture of a metal frame, you can use a corner or a steel profile of a different section;
• a working body designed to increase the homogeneity of the batch. The activator in contact with the stirred solution acts on the components of the mixture. As a result, the concrete solution acquires a uniform consistency. As mixing organs, blades of complex configuration, special blades, screws and other types of activators are used;
• a tank in which concrete is mixed. Such a container is called a barrel and can be made from various materials. For self-production of a working container, you can use household appliances that have lost their relevance and performance - from washing machines to metal barrels. The containers used differ in size and volume, affecting performance;
• unloading device, facilitating and accelerating the discharge of the prepared solution. The design of the drain mechanism is determined by the layout of the concrete mixer, the design and dimensions of the barrel, as well as the mass of the concrete solution. Various technical solutions are used to facilitate the unloading process;
• drive station. Used as a driving unit Electrical engine. The transmission of torque from the electric motor can be carried out through a reduction gear or belt drive. The gear ratio and power of the transmission must ensure the possibility of unhindered rotation of a heavy container filled with a solution.

The concrete mixer differs not only in the variant design but also mixing methods. According to the principle of operation, mortar mixers are divided into the following types:

• gravitational. Distinctive feature of these mechanisms - the presence of a rotating container and a fixed screw activator. Stirred cement mixture under the influence of gravity without the application of force falls on the screw axis. Uniform mixing of the ingredients is ensured by the action of the blades welded inside the rotating tank. The gravitational method of mixing allows you to prepare concrete with the required degree of mobility;
• forced. They mix the cement slurry inside a permanently fixed tank due to the action of moving elements. The operational characteristics and uniformity of the working solution prepared in such mixers are much higher when compared with gravity units. The forced principle of mixing in private housing construction is rarely used. It is relevant in concrete mixers designed for industrial use.

Gravity concrete mixers 120L

According to the duration of operation, the mixers are divided into the following types:

• periodic action, used for private use. They are equipped with a low power electric motor;
• continuous operation. They are used for industrial purposes and are equipped with a powerful electric drive.

Let us dwell in more detail on the design of devices, the independent manufacture of which is quite simple.

Do-it-yourself homemade concrete mixer - popular designs

Homemade concrete mixer from a barrel

When planning independent production, it is advisable to familiarize yourself with proven designs in practice. Possible various schemes devices, of which the following units are most popular:

• mechanical concrete mixer. It is a barrel cut along the longitudinal axis, hinged on a metal frame. Inside the tank there is a movable shaft with blades. The transmission of torque from the electric motor is carried out through a V-belt transmission and a gearbox. The prepared solution is unloaded by tilting the bucket. The advantage of this mortar mixer is the shortened mixing time. The disadvantage of the unit is the spraying of the solution at an increased rotation speed;
• concrete mixer from a barrel equipped with an activator. According to the layout solution, this version of the mortar mixer is similar to the previously described one. The main difference is the use of a whole barrel, in which a sealed hatch is made for loading ingredients and unloading the solution. Torque transmission can be carried out both manually and with the help of an electric drive. In this embodiment, the container rotates, inside which the longitudinal combs are fixed. The quality of the batch is determined by the number of revolutions, not the duration of mixing. Despite the complexity of the design, such mechanisms are mass-produced;
• homemade concrete mixer with a mixer. When planning to make a concrete mixer with your own hands, you should pay attention to this option. Despite the complexity of the design of such a mortar mixer, it is worth working on it. The device provides increased uniformity of mixing of the concrete mixture due to the additional degree of freedom. The container with the activator is fixed on a metal frame and can rotate about the longitudinal axis. The frame assembly with the tank has an additional degree of freedom due to the hinged mounting on the base frame of the unit. It is important to ensure the tightness of the tank and the convenience of unloading;
• vibratory concrete mixers. To create a mortar mixer with a vibrational principle of operation, a high-power puncher is required, in the cartridge of which a metal shaft is fixed. The perforator should be rigidly fixed on the frame, ensuring that the shaft is aligned with the center of the container. On the opposite side of the shaft, a car disk should be rigidly fixed, the diameter of which is smaller than the internal size of the barrel. The vertically mounted barrel is then filled with ingredients. The components of the cement-concrete mixture under the influence of vibration are uniformly mixed. Deciding how to make a concrete mixer with your own hands from car disk use this option.

For self-production of a concrete mixer, any design option is suitable.

Homemade concrete mixer with a mixer

Do-it-yourself concrete mixer - pros and cons

Regardless of whether a large concrete mixer or a small-sized mixer will be made, familiarize yourself with the advantages and disadvantages of home-made devices before starting production.

Advantages of self-made mortar mixers:

• saving money compared to purchasing a ready-made unit;
• improved quality of the prepared cement-concrete mixture;
• reduced duration of mixing the ingredients of the concrete solution;
• convenience of unloading the prepared mixture by tilting the mixer barrel;
• the possibility of manufacturing a mixing device with a manual drive;
• a wide range of materials and containers for self-manufacturing.

Drawing. Tipper concrete mixer

Problem points associated with the independent manufacture of mortar mixers:

• complexity of manufacturing living conditions without professional training;
• the need to adjust components and elements to ensure trouble-free operation;
• splashing of cement slurry at an increased frequency of mixing.

Do-it-yourself concrete mixer - pros and cons

Analyzing the advantages and disadvantages, many developers prefer the independent production of concrete mixers. At the same time, it must be taken into account that if a concrete mixer is made from a barrel with your own hands, the drawings must be used only proven in practice.

How to make a concrete mixer from a barrel with your own hands

Thinking about how to make a concrete mixer with your own hands, prepare drawings or sketches in advance. It is possible to sketch out a full-scale sample for manufacturing, which has positively proven itself in operating conditions. Consider the features of self-production of various options.

How to make a manual and electric concrete mixer

The manual version of the mortar mixer is the simplest. It is best suited for mixing small volumes of mix and is cheaper than electrical models. The mixing process is carried out by filling the tank with components, followed by the transfer of torque by turning the handle.

Design handheld device It is a metal frame on which a rotary shaft with a container for mixing is fixed in hinged supports. A handle is fixed on one side of the drive shaft.

The assembly algorithm provides for the following operations:

• Welding of metal structures. It consists of two triangular sidewalls connected by jumpers. In the upper part there are bushings for fastening the rotary shaft.
• Preparation of the mixing tank. As a container, you can use a barrel, a milk can or a washing machine body. Inside it is necessary to fix the blades.
• Installation of the container on the rotary shaft. It is important to ensure a rigid connection and seal the gaps in the shaft attachment areas.
• Fixation of the handle for mixing and control of the tightness of the mixer. For testing, it is necessary to fill the container with water and make sure that there are no leaks.

Preparing the mixing tank

By following the indicated sequence of operations, a concrete mixer can be easily made with your own hands. Drawings or sketches can be corrected, providing for the possibility of using a milk can or other container.

If a V-belt pulley or a chain drive sprocket is fixed on the side of the shaft opposite to the handle, then it is possible to ensure the transmission of torque from the gearbox connected to the electric motor. A do-it-yourself concrete mixer from a barrel, driven by an electric motor, will provide increased mixing efficiency.

Homemade concrete mixer with a washing machine engine

Using a 0.18 kW motor with a rotation speed of 1500 rpm, it is possible to assemble an electric drive for a mortar mixer. To transmit torque, a starter gear and a flywheel from a car are used.

Do-it-yourself mobile concrete mixer from a washing machine is made in the following order:

• Weld the frame with the gear axles.
• Fasten the wheels.
• Install the drive gears on the axles.
• Attach the motor with a pulley.
• Assemble the belt drive.
• Attach the barrel to the end of the flywheel.

It remains to connect the power supply and check how the homemade concrete mixer from the washing machine works.

Conclusion

Guided by the above recommendations, it is easy to make a concrete mixer with your own hands. Before starting self-manufacturing, it is important to decide on the design of the device. When figuring out how to make a concrete mixer with your own hands, prepare the drawings first. They will help you avoid mistakes.

Construction is often associated with constant use a large amount of concrete, the mixing of which requires not only a lot of physical strength, but so much time.

To facilitate, or rather solve this problem, the construction of a home-made concrete mixer will allow, a device that allows you to simply and quickly prepare the required amount of the mixture in the right proportions and the required consistency.

The question of designing a home-made concrete mixer, in principle, rests on a very simple technical task to build:

1. simple in design, with the least number of parts and connections device;
2. while using improvised, maximally accessible or simply low-value parts and mechanisms;
3. reliable and unpretentious in operation, including with minimal costs for repairs and maintenance.

With all the variety of ideas and technical solutions the issue of concrete preparation, all designs of concrete mixers, in principle, are reduced to solving a simple problem - mechanical mixing dry, and after adding water and a liquid mixture until a homogeneous composition suitable for further construction work is obtained.

In view of this, the most popular among do-it-yourselfers are units based on:

• on the use of muscular strength;
• using electric motors and various gearboxes;
• small machines using conventional household power tools as a working body.

According to their type of construction, homemade concrete mixers can be divided into the following groups:

• using the gravitational principle of mixing - simply obtaining a homogeneous mass by simply turning over the container with cement and filler, when, under the action of gravity, the mixture is repeatedly poured and mixed;
• forced-mechanical method of preparing working concrete - most often this is an option when the solution is mixed in a horizontal or inclined container using an internal mixer. Options are possible here - either the mixer itself rotates inside a fixed tub, or the entire container rotates, with the mixer blades tightly fixed inside.
• vibration method - the method of preparing concrete in this case consists in mixing the components using a vibration mixer placed inside the tub. Such a vibrator mixer that creates enough high frequency produces vibrations, displacement of cement and filler.

At the same time, of all the considered types of structures for self-production, the first two types are the most suitable, since the third vibration method of preparing the mixture is the most technologically advanced and energy-intensive.

When starting the practical stage of project implementation, one should clearly understand what characteristics the design should have.

In this the primary role is played by:

1. the size of the working capacity - tubs;
2. the number and type of nodes containing various rotating parts;
3. the design of the unit - it must ensure reliable retention of the tub, be stable and at the same time relatively light.

Tub

There can be a lot of options for use as a container for preparing the mixture:

1. milk concrete per 40 liters;
2. gas cylinders;
3. barrels;

The main issue when choosing a material should be its quality, thickness, the possibility of fastening parts using electric welding.

For a horizontal type of container location, a side filling window is provided, with an inclined, or with the possibility of changing the angle of inclination, tubs with a slightly narrowed neck are used open type for comfortable sleep constituent parts solution.

Inside, to improve the quality of the prepared solution, blades or metal combs are welded, which contribute to better mixing of the components. Such blades are made of metal with a thickness of at least 2 mm.

Drive unit

To activate the working capacity of the mixer, the simplest today are:

• manual drive- an elementary solution to this problem - an axis fixed on two supports, on which a bucket is fixed, on one side of the axis there is a curved end, similar to that which is installed on wells;
• electric drive- an electric motor that transmits the rotation of the shaft using a belt or gear transmission to the bucket. This is the most common version of homemade concrete mixer drives, however, it is poorly suited for working in unprepared areas without an electrical network;

Mixer

The mixer can be:

• metal rods with a diameter of 8 mm or more, welded in the form of a comb and used in mixers with a fixed bucket, where only the central shaft rotates;
• sheet metal with a thickness of 3 mm or more, welded in the form of blades to the walls of the mixer tank at an angle of 45 degrees to the bottom;
• standard mixer for electric drill-mixer used in vibrating systems;

Simple Mechanical Concrete Mixer

The simplest and most effective option budget concrete mixer

The design of such a device consists of:

• base in the form of welded from corners, pipes or a profile of a stable base that can withstand the rotation of a barrel with 50-7 kg of concrete;
• a tub, as a rule, is a barrel, a milk can, a metal container from under paint, or part of a gas cylinder with a hermetically sealed neck, and a shaft in the central part, mounted on a base, on bearings or bushings;
• hand drive handle for rotating the tub, in large versions of devices for facilitating rotation, handles are provided on both sides of the barrel, for the simultaneous operation of two people in order to facilitate work;

The base is a square, to two opposite sides of which the sidewalls are welded in the form of two triangles (the triangle is the most stable and rigid figure), on top of which the shaft of rotation of the bailey is fixed on bearings.

Horizontal barrel mixer

A simple and efficient mixer.

Comprises:

• grounds;
• buckets, with a hinged lid, and a locking mechanism;
• rotation shaft on bearings or bushings with a handle for rotation;

A design feature is the location of the barrel horizontally or the installation of the shaft diagonally through opposite sides bottoms and necks of the barrel.

In this homemade version, two or three combs resembling a rake are attached to the working rotating shaft inside the barrel. The combs are made of a metal rod, strip, or other material, in such a way as to mix the concrete during rotation, passing between the teeth.

Combs along the shaft are mounted in such a way that between them there is an angle of 180, 120 or 90 degrees from the central axis. The base is made according to the principle of other concrete mixers. Drainage of the finished solution is usually done by tipping the bucket or by opening the drain.

This version of the mixer is considered as the pinnacle of the engineering abilities of do-it-yourselfers in the field of concrete mixers. In fact, this is a copy of the industrial way concrete mixers.

But, at the same time, it has a number of features:

1. instead of a ring gear used in industrial units for home-made analogues, a drive is used through a gearbox or a gear train to a barrel, sometimes the latter to track rollers;
2. at the same time, the tub-barrel, like the industrial prototype, has a narrowing in the upper part of the body, and inside there are 2-3 side mixer blades welded in a spiral to improve the mixing of the solution;
3. the base is designed taking into account the weight of the container with the filled mortar and the possibility of its tipping over to drain the finished concrete;
4. The most commonly used drive is:
5. an electric motor with a belt drive to the drum rotation shaft;
6. electric motor with reduction gear.

Among the indisputable advantages of such a machine is ease of operation and minimum costs work force at work, but the minus is the accurate calculation of all components and parts, the presence of almost professional knowledge and skills when working with many tools, including electric welding.

Obtaining the highest quality solution is possible when using a vibrating concrete mixer. This is also the most high-tech type of mixer.

Used as a working container gas bottle or another container with thick walls, but with a relatively small diameter, since quite a lot of power is required to operate the vibrator.

As a vibrator, a conventional perforator with a specially made working body in the form of two dish-shaped or even mesh plates turned upside down to each other can be used.

The container is fixed vertically on the base in such a way that it provides a stable hold of the container itself and the vibration mover.

The propulsion power must be at least 1.5 kW, the use of a smaller engine or a rotary hammer is fraught with inefficient operation of the system or a quick breakdown.

The base of such a concrete mixer is almost identical to all other types and must ensure not only the stability of the structure itself, but also the possibility of turning over the tank to drain the finished concrete.

When assembling such a unit, the following main errors and disadvantages are possible:

• constructive:
• discrepancy between the calculated and real design in terms of the rigidity of the main parts;
• wrong container for the mixer;
• an electric motor that does not correspond in terms of power and number of revolutions;
• gearbox that does not meet the requirements;
• technological:
• insufficiently tightly connected body parts;
• unstable base;
• high location of the rotating tub;
• narrow or vice versa wide necks;

In addition, the mandatory requirement of electrical safety when installing electrical equipment should be taken into account.

With a drill, everything is much simpler:

1. The electric drill is not intended for continuous use. The mode of operation is variable-long 5 minutes of work, after which a 15-minute break is required;
2. drill gears today are mostly made of plastic, and are designed for a force sufficient to drill holes no more than 13 mm in concrete, 20 mm in wood or 12 mm in metal, but 70-90 kg of working volume are not intended for mixing;
3. making a concrete mixer with a bowl volume of 5-7 liters is not rational.

Conclusion

As experience shows, the creation of any, even the most a simple remedy mechanization of labor significantly increases productivity and reduces work time.

In fact, this is not the most complex human invention created from improvised means and does not require mandatory higher engineering education, a few skills in working with electric welding, and a couple of days of work will allow you to have a working model of the unit, which makes it possible in the future not only to improve the design, but also to correct the identified flaws.

It is difficult even to imagine any construction site without technological processes using cement mortars. And for the owners of their own country house, with their constant state of “permanent” repair and landscaping, concreting in general is a very popular operation - either garden paths need to be poured, then the foundation for the gazebo, then the blind area should be renewed, then a fence should be put up ... In a word, literally on every step requires the manufacture of concrete - the difference is only in the scale of the event.

Many individual builders prefer not to bother with self-mixing of the mortar - this can be avoided if there is a concrete goods factory nearby or another company that provides services for the manufacture of concrete and its delivery to the place of work. But, firstly, it costs a lot of money. Secondly, not everywhere such an opportunity is present. And, thirdly, it does not always make sense to use such services for reasons of a small scale construction or repair task - it will be either simply ridiculous or extremely unprofitable. It’s easier to make the right amount of solution yourself. This, of course, can be done manually, but it is better to purchase (rent) a concrete mixer or show yourself a real owner: for the future, make yourself a concrete mixer with your own hands.

The article will discuss several homemade models concrete mixers - from the simplest to those that already differ little from the samples presented in stores.

Brief excursion - what are concrete mixers

By by and large, you can cook without any equipment at all. Some masters even like to work like this, "the old fashioned way", mixing cement nt with sand and other components (if necessary), and then gradually adding the right amount of water. For this, large containers with low sides are used, factory-made or even home-made, knocked together from boards and sheathed with thin metal.

Mixing by hand - how much time do you have?

Some people prefer to do without containers altogether, by preparing the solution simply on a prepared flat area. However, in any case, the procedure for mixing with a shovel or hoe, first dry components, and then with water, is a very laborious process that takes a lot of effort for another preliminary stage before the start of concreting. And if the work is planned on a fairly large scale, then this approach will not justify itself.

Prices for concrete mixers Whirlwind

concrete mixer Whirlwind

Construction mixers or drill attachments - they will go more for dry building mixtures or composite polymer materials. Sand with cement for them is already a rather difficult “test”, and if there is still a need to add gravel, gravel or expanded clay of a large fraction, then the mixer or drill can be safely put aside: not only can you not achieve a high-quality, homogeneous batch, but also and there is a high risk of overheating the gearbox or the electric drive of the device.

Concrete mixers (concrete mixers) cope with this task, which differ not only in size, capacity and drive power, but also in the principle of their operation.

Forced mixing principle

Forced principle - the mixing of the components of the solution is carried out in a fixed container. It is carried out due to circular movements of the shaft with blades connected to a mechanical drive. (Working with a construction mixer or a drill with a nozzle can also be safely attributed to coercive principle batch).

The layout of the installation may be different. So, the working drum can be a vertically located cylinder of small height, in which blades-blades rotate on a vertical axis (as in the figure above).

Another option is when the container itself is located horizontally, and the shaft with blades is also oriented in a horizontal plane. Below is circuit diagram such a concrete mixer - who knows, perhaps someone will use it as a prototype for self-production.

In the drawing, the numbers indicate:

1 – drum body, which solution is mixed.

2 - a frame on which all units of the unit are mounted.

3 - Electric drive. In this case, with such dimensions of the mixer, the power of the order of 5 ÷ 6 kW will be optimal.

4 – control and management elements: toggle switches, indicator lamps.

5 - Lower hatch (shutter) - for unloading the finished solution into a container substituted from below.

6 - lever to open the shutter.

7 - safety grill installed during kneading.

8 - a gearbox for transmitting rotation from an electric drive to a working shaft.

9 - Protective casing of the belt drive.

10 - safety clutch.

11 - a working shaft with blades installed on it for mixing the solution.

The unloading of the finished solution can also be organized according to a different principle - the working drum is mounted on the frame not rigidly, but pivotally. When mixing concrete, it is locked in working position. And in order to extract the finished solution, the container removed from the stopper, and with the help of a special lever it rotates in the suspension trunnions. The solution is unloaded into the substituted container through the top loading hatch.

Another scheme is somewhat simpler, with a lever for capsizing the container

Forced-action concrete mixers achieve very high levels of mortar homogeneity. They are actively used in industrial conditions, in construction, in private practice. However, they are not without significant drawbacks:

• In the working tank, it is often impossible to avoid the creation of "dead zones" - along the walls, especially in the corners. It is not easy to fit the blades with a minimum clearance to the inner walls of the cylinder, especially since under such conditions there is a constant increased wear of rubbing parts.
• Structural complexity - reliable hermetic protection of rotation units (bearing blocks) on the working shaft from the aggressive effects of cement mortar is necessary.
• It is almost impossible to prepare a solution with a filler of medium or large fraction in such a concrete mixer. But on the other hand, for plastering and finishing works, using ready-made building mixtures, this the most optimal option.

Gravity mixing

The gravitational principle of mixing - the components of the solution are mixed under the influence of their own gravity. A good example - put two different products in a glass jar, for example, two types of cereals, close the lid and start rotating - mixing will begin.

It is clear that such an approach in its "pure" form does not provide high-quality preparation of the solution, or it will take too much time to achieve an acceptable consistency. In industrial conditions, this method is not used, but for domestic needs, a small simple concrete mixer can be made.

The drawing shows a can - it is convenient in terms of tightly closing the lid. But, in principle, almost any container can be used, if the owner thinks well about the issue of its reliable closure while mixing the solution.

The axis of rotation can be fixed outside the container - in this case, it is not necessary to ensure the sealing of the assembly when it passes through the wall. But still, it is better to make it through - such an artificial obstacle during gravitational mixing of the solution will somewhat increase its quality.

On the Internet you can find many interesting solutions for the manufacture of such simple concrete mixers from improvised means. Very often old ones are used iron barrels. To make a stand - probably not a single good one home master there will be no particular difficulty.

The most difficult thing, probably, again, is to think over the issue of a tight-fitting hatch, which, when open, will allow loading the components of the mixture and pouring water, and when closed, with stirring, will not allow leakage liquid solution. Approaches here can be different, but most often they use a door on welded hinges, the opening for which is sealed with rubber around the perimeter.

Some creative masters complicate the design somewhat in order to improve the quality of concrete mixing. So, for example, to increase the amplitude of differences in height, the barrel can be placed not along the “correct” axis of the cylinder, but diagonally.

Of course, it is somewhat more difficult to rotate such a concrete mixer, but on the other hand, the uniformity of mixing the solution will be achieved faster.

Combined principle

So, as mentioned above, gravity principle mixing in its "pure form" does not differ in performance and high quality batch. Surely there will be objections - after all, it is believed, and many sources state that most of the usual concrete mixers with an angled rotating drum use the gravitational principle. One can agree with this, but only by making one very important remark.

In such mixing devices, the blades are necessarily rigidly fixed on the inner surface of the working drum. Their configuration and size are thought out by the designers. During rotation, these blades move relative to the solution tending downward under its own weight. Thus, in this case it would be more appropriate to talk about the combination of two principles - both gravitational and forced. And indeed, this is how the vast majority of cooking devices are arranged.

There are several advantages right away:

• No sealing is required, neither the drum itself (it is constantly open at the top), nor the rotation unit (since no contact with the solution is expected here).
• Part wear is much less.
• Such concrete mixers are simple and reliable in operation, easy to maintain.
• There are practically no restrictions on the component composition of the solution - crushed stone, gravel, expanded clay, etc. can be used.

The manufacture of a concrete mixer of this type will be discussed in more detail.

By the way, let's go back for a minute again to those simple concrete mixer-barrels, which were mentioned above. If you show a little ingenuity, then they are also very easy to upgrade, dramatically improving both their productivity and the quality of the mixed solution. To do this, it is enough to triple the blades or some other artificial obstacles on their inner surface.

One of the options is shown in the diagram. In this case, a comb was used, which is easy to weld from a corner and trim a reinforcing bar. Two such combs will immediately transfer the concrete mixer from the category of gravity to the “family” of more advanced, combined ones.

Vibratory mixing of mortar components

Not so often, but still, some enthusiasts try to apply the principle of mixing the concrete solution using vibration. In industrial conditions, such installations give excellent results, they are used for the manufacture of highly precise reinforced concrete parts with the highest performance characteristics.

And at home, the craftsmen try to use a powerful one as a drive (the main thing is that its vibrational action is independent, it does not require pressing the cartridge against an obstacle).

It turns out something like this scheme:

1 - the body of the container in which the components of the solution are mixed. Preference is given to round, not too large in radius, but high tubs ( barrels).

2 - a bracket is rigidly attached to the body, in which the vibro-impulse generator is located, in our case - a perforator (pos. 3).

The power of the perforator should be at least 1.3 - 1.5 kW. Even this will not give a guarantee of success, and with less drive force, it is not worth trying.

A long rod (pos. 4) is inserted into the perforator chuck, which is connected to a vibrator (pos. 6). This rod must be of such length that the disk vibrator is approximately in the center of the prepared solution layer height (pos. 5).

It seems that everything is simple, but far from always such a scheme shows good results. Mistakes, most often, lie in the neglect of seemingly small nuances:

• A flat vibrator simply will not work. A shape is needed that will propagate vibrations in a dense medium from a central point almost spherically to the periphery. There should be something spindle-shaped, similar to two plates connected together with the bottoms out. In principle, this is one of the solutions - two metal plates mounted on an axis.
• The vibrator diameter depends on the drive power. In calculations, one can proceed from their approximate proportions: 150 ÷ ​​200 mm per 1 kW of puncher power. So, if we take a 1.5 kW puncher, then we prepare "plates" from 225 to 300 mm in diameter.
• The diameter of the cylinder itself should be such that from the outer edge of the vibrator, placed exactly in the center, to the container wall there is a distance of approximately equal to the radius dishes.
• To create vibration waves that can handle agitation cement-sand mixture, the level of the solution above and below the vibrator must necessarily be approximately equal to the diameter of the "plates".

Vibratory kneading concrete mixtures gives excellent solution quality. The process is very easily monitored visually - from active stirring, movement, bubbling - to a flat, rippling surface (ready-made solution). But, you must admit that for this you need to observe a lot of specific “whims”. And yet - "heavy" solutions with gravel or gravel in this way are also problematic to prepare. So wide application does not find a similar method among private traders - it is easier to make a concrete mixer according to the "classic" scheme.

Independent production of a "classic" concrete mixer

It is necessary to immediately warn "hot heads" - not everyone can take on the manufacture of such a concrete mixer. Although in many articles there is a “bravura motive” that it is both easier and cheaper than buying a ready-made one, you should not believe it.

- Firstly, you should not start such work if the owner knows about the art of welding only by hearsay or does it in this field.

- Secondly, the work will be profitable if most of the components for the manufacture of concrete mixers can be found among unnecessary things in their own household, from neighbors or even in a landfill.

- Thirdly, the existing experience in design, production of plumbing, welding, electrical work and the available inexpensive or generally free materials should be multiplied by the expressed desire to make a concrete mixer on their own. There is a fairly large category of people who are eager to try to do everything with their own hands - this is a task just for them. If you start work without fulfilling such conditions, simply cherishing the ephemeral hope of saving something, then it’s better not to start. Time and materials will be wasted, and it will be much cheaper and easier to purchase a small and inexpensive concrete mixer - fortunately, the choice is quite large.

The general scheme of concrete mixers is approximately the same

If we consider almost any of these concrete mixers, then three main structural units are always clearly distinguished:

• The container itself (badya), in which the solution is mixed, with all the additional mixing devices in it.
• Frame (frame, frame), which serves to place on it a mixing tub, an electric or manual drive, controls and, if necessary, means of movement. The frame must provide a movable hinged fastening of the container, the degree of its freedom both around its own axis and relative to the horizon with different angles tilt. The structure itself may be stationary, or it may be wheeled for movement around the construction site.
• The drive is a mechanism that ensures the rotation of the mixer tank around its axis. In most cases, an electric drive is used. For small concrete mixers, a manual drive may be sufficient. It is possible (infrequently) to meet options for installing internal combustion engines (gasoline or diesel) - then the concrete mixer will not be dependent on the power supply. Any drive transmits torque with the number of revolutions necessary for the kneading technology through the gearbox (there are no restrictions - the craftsmen use any type of gear - gear, belt, worm, etc.).

Now consider the manufacture of all these nodes separately.

mixing tub

In the manufacture of a mixing tank, it is assumed that during operation it is usually filled to a maximum of 30 - 40% of its total volume. Usually these tubs are made with a volume of 100 to 200 liters. If these limits are exceeded, it will be difficult to independently create a reliable stable frame and supply a home-made concrete mixer with such a powerful drive. With small volumes of the tank, both assembly and operation of the concrete mixer often become simply unprofitable.

Prices for concrete mixers Enkor

concrete mixer Enkor

The easiest way, of course, is to find a ready-made container that is suitable in terms of volume and dimensions as the main mixer. Immediately asks for se the same metal barrel.

The easiest approach is again a metal barrel

This option is quite possible, however, for a good concrete mixer, the cylindrical shape of the tub is not optimal. A lot of unmixed solution may remain in the corners around the bottom, and splashing out of the solution from above during stirring is not ruled out.

Making a smooth transition to the walls is a very difficult task, but probably any master can give the barrel a pear-shaped shape. Triangular cutouts are made on top, and then the remaining "petals" are welded so that a uniform narrowing is obtained.

Improved barrel - made narrower in the upper part

An interesting solution was found by a craftsman who decided to adapt a plastic barrel. And why not? Smooth curves of the form - what is required for the capacity of the concrete mixer. It is quite possible to attach the blades to its inner surface, and from the outside below - an axis with a rotation transmission mechanism not by welding, but by screw connections. But what a huge gain in terms of the mass of the device itself!

The original approach - a plastic barrel

As a result, the designer of this model even managed not with a steel frame, but with a mobile wooden base - a cart on wheels.

The height of a standard barrel for use as a concrete mixer tank is still too big, complicating the alignment of the entire unit. Please note that in such cases, support rollers are usually used for stabilization - a high tub, as it were, rolls along them, resting on its upper part.

If there is no suitable container, but sheet metal with a thickness of 2 ÷ 3 mm is available, then you can try your hand at making the container yourself, giving it all the necessary shapes.

In order not to be unfounded, for those owners who consider themselves a master in welding work, you can offer interesting drawing manufacturing a "classic" concrete mixer with a teardrop bucket.

The general dimensions of the tank, without the connection unit with the reducer - 400 ÷ 500 mm. It would seem - a little, compactly, but even only in the cylindrical part about 30 liters of mortar are placed - a completely acceptable indicator for a household concrete mixer.

1 - automotive wheel hub. You can make this part yourself, but it’s still easier to use the finished one.

2 - the bottom of the tub. It is cut from a steel sheet, preferably 5 mm thick. In the figure below, this position is shown separately in an enlarged view. Holes (8 PC, with a diameter of 6.5 mm) must exactly match the holes on the hub (pos. 1 ).

3 - the cylindrical part of the tub (shell) is welded from a steel strip bent into a ring, 2 mm thick, 150 × 1580 mm in size. All welds during the assembly of the tub are made solid, sealed. It is advisable to reinforce the shell from above with a metal bandage ( tape).

4 - the conical part of the tub is welded from four identical parts. Their dimensions, including the radii of curvature in the upper and lower parts, are shown in the figure.

5 - along the upper edge, the edge of the tub flares outward, and By circle, a steel bar with a diameter of 10 mm is welded (well shown in the diagram - node A ).

6 - “blades” are welded inside the tub - solution dividers. In this case, the structure shown in the diagram, made of a reinforcing bar with a diameter of 16 mm, will be quite enough. Such dividers are made in 3 pairs and welded evenly around the circumference, through 120 °. By the way, they should give the tub additional strength. In each pair - one straight divider coming from the bottom in the neck, and one - bent at a right angle.

bottom node ( B), which includes, among other things, the already mentioned hub and bottom, is better shown in a separate, enlarged drawing.

7 - bolts connecting the hub to the bottom. The nuts are on the outside. Between the parts there is a rubber gasket at least 2 ÷ 3 mm (pos. 11).

8 – a screw with a washer that secures the hub to the gearbox output shaft (pos. 9 ). A key prevents the hub from turning on the shaft (pos. 10 ).

Lower connection block ( B) is prepared, tried on, but mounted only after the frame is assembled and the drive and gearbox are installed on it. In principle, this will be one of the final operations - on the node already mounted to the gearbox B will "sit down" on the screws of the concrete mixing tank.

All welds must be free of scale and carefully checked to ensure that full impermeability tubs.

Video: homemade concrete mixer with a bucketwelded from a steel sheet

concrete mixer frame

In the manufacture of frames or trolleys for concrete mixers, the ingenuity of craftsmen is also quite welcome, who can adapt unnecessary items in the household for this design. metal parts and wheels.

Frames can be wheeled - that is, it will not be difficult to transport them to the right place. You can also make a stationary, fixed frame - it is easier to manufacture, and in a suburban area, usually any large movements of the concrete mixer are not planned.

The frames may also differ in the degree of freedom provided by the mixing tub. So, the container can be installed pivotally, with a change, as necessary, in the angle of inclination of its axis to the horizon - for solutions of varying degrees of "severity", for pouring ready-made concrete, for washing the container, etc.

A simpler option is when the bucket on the frame always occupies one position, and the entire concrete mixer leans forward to unload the solution - like a wheelbarrow (as shown in one of the figures above) or children's rocking chairs on arched skids.

Video: homemade concrete mixer with a swing frame

However, we will continue to consider the drawing of a concrete mixer, the manufacture of the mixing tub of which was described above. It is possible to go this route as well. Drawing, for ease of perception and for greater clarity in the dimensions and layout of parts, is presented in two projections.

Concrete mixer - front view

Assemble such a frame from ordinary and shaped pipes and scraps sheet metal- for an experienced locksmith - welder will not be something extremely difficult at all. Meanwhile, this design is well tested - it is not heavy, but it ensures reliable stability of the concrete mixer in the transport and working position, ensures maximum ease of operation.

She is a side view.

1 - this is the same tub that was described in the last section of the article.

2 - handle-lever for setting the bucket in the desired position and for tipping it when unloading. For a lever, you can use steel pipe½ inch (½ʺ).

3 – a gusset cut out of 3 mm steel (s 3) ensures that the lever is securely fastened to the swivel subframe (pos. 18 ).

4 – metal wheels Ø 350 mm. Usually they are taken from decommissioned agricultural machinery.

5 – persistent legs with thrust bearings, for stable installation of the concrete mixer in the working position. They are made of ½ʺ pipe (pillars themselves) and s3 steel (thrust bearings).

6 - the cross beam of the frame of the concrete mixer. A profile pipe with a cross section of 60 × 20 mm is used.

8 - an inclined beam (pipe 60 × 20 mm), and for its rigidity - a brace (pos. 7 ) connected to the cross beam. For strut - pipe ½ ʺ.

9 – a panel to which the electric drive control elements will be attached. The panel is cut from s3 steel.

11 - wheel axle. It is made from a metal circle Ø16 mm - according to the size of the mounting hole available wheels.

12 - longitudinal beam of the bed of the concrete mixer. profile pipe 60 × 20 mm.

13 - vertical stand. Profile pipe 60 × 20 mm.

14 – an eye of hinged fastening of a rotary subframe. Two parts are made, from s5 steel.

15 - transmission gearbox. In this version - a ready-made assembly, worm type, with a gear ratio i = 17.

16 – safety clutch on the drive shaft.

17 - . Specifically, in this concrete mixer model, the developer used a three-phase drive (380 V), with a rated power of 1 kW, and a rotation speed of 950 rpm.

18 - a swinging subframe, on which both the electric drive with the gearbox and the mixing tub itself are mounted. It is made from the following parts: two spars from a ¾ʺ pipe, four crossbars from a corner 35 × 35 mm.

19 , 20 And 21 – electric drive controls: start button, capacitor box and power cord with a three-phase socket, respectively.

Now - a slightly larger node A, which ensures the installation and fixation of the mixing tub in the desired position.

On the stretcher (pos. 18 ) welded eyelet (pos. 22 ), and on an inclined rack (pos. 8 ) – sector (pos. 10 ). Both the eyelet and the sector can be made of s3 steel. The selected position is fixed with a pin (pos. 23 ), and so that it does not get lost, it is recommended to hang it on a chain.

The number of fixed positions in the sector may be different. However, it is usually sufficient T rex:

- at an angle of 50 ° to the horizon - for mixing heavy concrete mortars;

- at an angle of 30 ° - for the preparation of light mortars (for example, masonry);

- horizontally - for washing the tub.

After the frame is assembled, all welds are beaten off from slag, the parts must be cleaned of corrosion pockets. Then it is recommended to cover the structure with high-quality paint for metal. The rubbing components of the frame (subframe suspension in the frame lugs, wheel axles) are generously lubricated with ordinary hinged grease.

In the considered version, the drive and the gearbox unit are attached to the subframe (so that exact alignment is observed). After checking the performance (trial run), you can finally assemble the concrete mixer by putting it in place and fixing the mixing tub with bolts.

A few words about the drive

In the example under consideration, the electric motor and gearbox already recommended by the model developer were used. However, in the practice of self-manufacturing concrete mixers very widespread there is a situation when the master “on the go” selects a drive from what is available and comes up with a way to transfer torque to the mixing tank.

It is customary to calculate the required power of the electric drive, based on the ratio of 20 W per liter of solution for a scheme with an inclined bucket. (In a horizontal arrangement, for example, in models with a barrel on a horizontal axis, 15 W / l will be sufficient). You should not forget about this ratio so as not to overload the drive. For example, if the engine in our case has a power of 1 kW, then more than 50 liters of solution should not be mixed, regardless of the size of the tub itself.

Thus, often they begin to manufacture the tub itself, starting from the parameters of the drive, which is planned to be put on a concrete mixer.

The rotation speed of the mixer tub must also be within certain framework . So, it is considered optimal from 30 to 50 rpm. To make the speed less - to deliberately delay the process of making the solution. And if the speed is too high, then spraying of the solution will begin.

Finding a ready-made gearbox that would meet the requirements both in terms of dimensions and gear ratio is not always possible. Therefore, many masters find their own, sometimes very original ways transmission of torque with the provision of the desired angular velocity. In the variant that was considered, the mixer is planted directly on the driven axle of the gearbox. However, often the bucket is mounted on a free axle, and the torque laneeaten on it with a gear, belt, chain drive. For example, here are some original solutions:

Instead of pulleys - bicycle wheels

Homemade gearbox - drive from an old washing machine transmits the rotation of belt drives through the pulleys of their gears and old bicycle wheels.

The simplest frame with a homemade gearbox

Fixed frame for a concrete mixer with a homemade gearbox.

Homemade gearbox, which combines a belt and two chain drives. Again, not without bicycle parts.

A small-sized concrete mixer, the rotation of which is transmitted to the bucket directly through a belt drive. The pulley is structurally placed on the mixing tank itself.

Very often, car parts that are unnecessary in the garage are used. A popular solution is to use a flywheel with a ring gear. By the way, it is very easy to find a drive gear in a pair for it - from the bendix of a car starter, since they are " made for each other".

The flywheel can be fully assembled welded to the bottom of the tub.

Another option is when only the ring gear is used. Perhaps it is not necessary to say that in this case it is extremely important point there will be a very careful centering.

In a word, a thrifty owner can very often find details for his own original solution the issue of manufacturing the desired gearbox. Perhaps the options shown will be a good hint for someone.

Video: another version of the design of the concrete mixer

Prices for concrete mixers Stroymash

concrete mixer Stroymash

If everything worked out, then the owner can be congratulated on the successful acquisition of a good “assistant”. But in order for the concrete mixer to last longer and not cause any emergencies, you need to follow certain rules:

• Like any equipment associated with the consumption of electricity, a concrete mixer requires compliance with electrical safety rules. And in this case, this issue is even more acute, since the operation is always carried out in conditions of high humidity and high probability splashing water. That is, all cables and contact connections must have the most reliable insulation, which completely excludes electric shock or short circuit.
• The operation of a concrete mixer is always associated with high levels vibrations. This leads to weakening threaded connections, which means that you need to regularly check and tighten them. At the same time, one should not forget to control the safety of other assemblies and parts, welds, etc.
• Before starting work, you need to make sure that the installation of the concrete mixer is reliable. It should rest firmly on all of its standard stands. If the structure is mobile, then wheel chocks (wedges) are placed under the wheels.
• Never, under no circumstances Not Do not leave a working concrete mixer unattended. Curious people should not be allowed near it, and even more so - children.
• When working, it is better to use protective equipment for the skin and eyes - since the cement acts quite aggressively on tissues and mucous membranes.
• Checking the quality of the resulting solution with a shovel or stick while the concrete mixer is running is the height of imprudence! Very often, such actions end in a serious injury to the hands or face.

And in conclusion of the article - proof that there are no limits to creativity when creating home-made equipment.

Video: homemade concrete mixer based on an old T-16 tractor