Do-it-yourself gearbox for a walk-behind tractor
Installation of the brake system and electrical equipment
To begin with, determine the place (using the layout diagram) where the brake pedal will be located in the alteration. On the designated plot, mount the pedal mount and the main brake cylinder. Then the cylinder is connected with hoses to the brake drums located on the front wheels of the converted tractor.
Immediately after that, the brake system is checked for leaks, and if it is broken, everything will have to be redone. To avoid ridiculous mistakes, it is better to use a visual drawing, which shows all the main components of the tractor. For control, the system must be pumped over and the remaining air is removed. This will make it workable and provide proper functionality. The system can also be supplemented with a parking brake.
The next stage of self-alteration of a walk-behind tractor into a full-fledged mini-tractor is the connection of electrical equipment and the output of sensors to the dashboard. It is recommended to do this for the convenience and safety of vehicle operation. A temperature meter, a liquid cooling indicator, an ignition key, an oil pressure sensor and a fuel level in the gas tank are displayed on the panel. Optionally, a homemade tractor is supplied with a sound signal, stop lamps and direction indicators.
Additionally, agricultural machinery can be equipped with cladding elements and a canopy. This will give the mini tractor an attractive look and make the operator’s work more comfortable. After the completion of the process of modernization of the walk-behind tractor, you should run in a homemade mini-tractor so that the parts are “ground in” and the lubricity of the mating surfaces improves.
How to make a mini tractor from a walk-behind tractor with your own hands
Every farmer knows that it is easier and more convenient to cultivate summer cottages and household plots with the help of a small tractor. And it doesn’t matter if you don’t have enough funds to buy a factory “iron horse”. you can make it yourself from an inexpensive walk-behind tractor. over, when there is an interest in technology, engineering skills, the necessary equipment and tools, it will not be difficult at all to do this. The main thing is to understand the technical aspects, prepare for the transformation and choose the right motoblock itself. Then the refurbishment can begin. By the way, the manual for the walk-behind tractor may contain a drawing that will help you understand how best to make a homemade product.
Home made two wheel tractor gearbox part 2
Installing the undercarriage
At the end of the installation, the hitching devices are installed on both axles (front, rear), and already on them. the wheels. The rear axle is usually attached to those that came with a walk-behind tractor (Scout, Zubr, Neva), and wheels from a passenger car or some kind of agricultural machinery are mounted on the front axle. It is important that they have a deep tread. this will make a homemade mini tractor a technique of high cross-country ability and with improved traction of the wheels with the ground. Then the management will be much easier.
To equip a home-made tractor with a full-fledged front running gear, they buy hubs assembled with a brake system and, preferably, complete with steering rods, a steering wheel, a gearbox and a steering column. They can also be altered by removing them from used cars.
Fastening the front wheels to the minitractor is carried out in this way:
- A metal profile pipe is selected that corresponds to the thickness of the front axle of a homemade tractor;
- Wheel hubs are attached to the ends of the profile;
- The hub structure is fixed to the front frame directly in the center;
- The steering rods are mounted, after which they are aligned with the steering gear;
- The gearbox is fixed to the frame;
- Put the steering rod, steering wheel;
- Adjust the steering column, steering wheel.
Sometimes the front suspension of the tractor is supplemented with spring shock absorbers to provide more comfortable working conditions. After the steering column is assembled according to the drawing, you need to install the rear wheels.
The rear axle of the cultivator is mounted on bearings tightly pressed into spherical bushings. A pulley is mounted on it, which will transmit torque from the engine to the rotating nodes. You can leave the rear wheels of the fractures without a differential. this will simplify the design and minimize the slipping of the future mini tractor when operating on loose soils.
The optimal diameter of the tractor wheels is 30-36 cm (like the Scout T-15 model). If you put a homemade diesel unit on smaller wheels, it will simply roll forward. Fitting large wheels will make the machine unmanageable and impair its maneuverability, especially when working with a trailer. At the end of the installation of the wheels and the steering column, the layout of the main unit of agricultural machinery. the engine.
Preparing to create a homemade mini tractor
The process of creating a homemade mini-tractor begins with drawing up a drawing, a kinematic diagram of the future “plowman” and preparing the necessary materials, tools, equipment. If you have the skills, you can develop a scheme for demonstrating the mechanisms and components of the tractor yourself, if not, find a suitable option on the Internet or use the example presented here.
As for the parts and components involved in the modernization of the walk-behind tractor, you can use a purchased factory kit to convert it into a mini tractor. But this option is not suitable for those who want to make, for example, an all-wheel drive (4×4) tractor and at the same time significantly save money. Therefore, you will have to look for upgraded parts.
So, to create a homemade tractor you will need:
- Set of tools;
- Welding equipment;
- Drill with a set of drills;
- Metal pipes, channels;
- Fasteners, hardware (bolts, nuts);
- Grinder, discs for working with metal.
Also, in order to make a tractor with your own hands, you will need two suitable wheels, a hitch, a driver’s seat, a steering mechanism, pedals and, of course, a walk-behind tractor with sufficient weight and power. It is better to opt for a heavy-duty unit with a diesel engine (the Zubr, Neva, Agro, Scout models are well suited). This will make it possible to obtain, as a result of the alteration, a self-made, but productive mini-tractor capable of effectively performing various agrotechnical operations. Surely you want him to carry out not only agricultural functions, but also to be able to pull a trailer.
The weight of the unit to be selected must correspond to the state of the soil on which it is planned to use the homemade product. If it is compacted, dry, then the future mini-tractor is unlikely to cope with the tasks assigned to it. Therefore, the harder the soil, the harder the cultivator will be needed. And the power of its engine should be correlated with the area of the land plot on which agricultural work will be carried out using a motor-tractor. So, the larger the plot, the higher this parameter should be.
Mounting the engine and hydraulics
The most profitable option for converting a walk-behind tractor into a home-made four-wheeled tractor is a single-cylinder water-cooled diesel engine. this is usually installed on Chinese motor-cultivators of the Scout, Bison and Russian Neva brands. A single-cylinder diesel engine is economical, therefore, the operation of a mini-tractor produced on its basis will not be invoiced. It is typically placed on the front of the frame, allowing the small tractor to maintain optimal balance when operating with additional tools. At the location of the motor, a mounting system is installed, which is better to make “floating” (sliding) in order to simplify the adjustment and tension of the belts.
The transfer of power from the motor to the rear wheels of a homemade tractor is organized using a belt drive. The PTO transfer case, like the gearbox, can be used from a decommissioned GAZ-53 vehicle. The homemade power unit is mounted in such a way that the PTO pulley is located in the same plane with the pulley located on the rear axle of the minitractor. At the same time, they outline the location for the clutch pedal. The belt drive is covered with a protective cover to avoid slipping during operation and to make its service life longer.
After completing the main work, a hydraulic lift is installed on a homemade mini-tractor with an engine from a walk-behind tractor. The rework hydraulics kit should include an oil pump, oil reservoir, hydraulic cylinder and distributor. All components of the system are connected by flexible oil-resistant hoses. It is advisable to make the hydraulics with a floating mode. this will ensure the full operation of the tractor hitch. Then the tiller will work as it should.
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A large selection of attachments, which are also suitable for homemade tractors, see the link.
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Then, the driver’s seat is installed, as well as headlights and dimensions, if it is planned to move the mini tractor along the roads. They will ensure safety when operating vehicles at night and will avoid problems with demanding road patrol officers.
How to make a frame
After preparing the tools and accessories necessary to create a mini tractor, they begin to “reshape” the walk-behind tractor frame in order, in accordance with the drawing, to adapt it to an additional pair of wheels. The platform of the future home-made machine can be made all-metal or break-through using channels or shaped metal pipes. Longitudinal and transverse spars are easy to make. they are cut with a grinder and connected by electric welding or fasteners. For greater reliability, bolted connections are combined with additional welding of seams.
When transforming a cultivator into a mini-tractor, it is often a fracture that is used, consisting of two independent half-frames, connected to each other by means of hinges. Thanks to this design, all four wheels of the tractor are almost always in contact with the ground, and they practically do not hang out when using homemade products on an uneven surface or slippery road. This allows you to increase the stability of the mini-tractor from the walk-behind tractor, improve its maneuverability and maneuverability when carrying out arable and transport operations.
A hinged device is mounted to the front or rear section of the prepared frame according to the scheme, which will allow the tractor to make it possible to work with auxiliary devices. You can immediately weld on the rear hitch for towing a trailer. this will further expand the functionality of a homemade motorized tractor obtained from a walk-behind tractor.
Advantages of homemade tractors from motoblocks
The advantages of owning such a unit are obvious. Unlike a walk-behind tractor, it will allow:
- Expand functionality;
- Facilitate the operator’s work;
- Realize traction potential.
Using skills, you can make a multifunctional and efficient mini tractor from a conventional motorized cultivator with limited capabilities. Maneuverable, compact. it is able to work even in densely planted areas, between bushes and trees, as well as in a limited local area, without spoiling the paving slabs and asphalt pavement. Look at the form where there is a video about the work of homemade equipment.
To make a mini-tractor from a walk-behind tractor means to buy yourself agricultural machinery with the broadest functionality. Together with it, you can use a variety of attachments: cultivator, potato planter, cutter, harrow, rotary mower, plow, hillers, etc. And if you equip a stacker with a hydraulic drive, then you can operate a homemade tractor as a stacker or a crane. Thanks to its practical design, working on such a homemade product is simple, comfortable and safe. And the remaining motoblock parts can be used to create other homemade products. A homemade mini tractor is better than the most expensive heavy motor cultivator and cheaper than a heavy tractor.
How to make a trolley for a walk-behind tractor with your own hands: drawings and dimensions, photos, videos
A trolley for a walk-behind tractor is a trailed equipment for universal agricultural motor vehicles for transporting goods on personal and land plots. With the help of such a mechanism, garbage, animal feed, building materials, fertilizer, grain, inventory are transported.
The trailer and adapter for the walk-behind tractor are varieties of homemade products made by skilled mechanics. The adapter is a longitudinal beam with its own chassis, driver’s seat and footrest. This module makes it possible to work the soil in a sitting position, as well as attach 2 equipment at once. in front and behind.
The trolley is a type of adapter with a difference in the design of the undercarriage.
A purchased cart for a walk-behind tractor is expensive. To save financial resources, craftsmen make it themselves, design construction drawings, select the necessary materials. The process of creating such a useful vehicle does not take long and is not difficult. Even a beginner, at least a little versed in technology, can handle it.
A brief overview will help you figure out how to make a trolley for a walk-behind tractor yourself with good performance characteristics.
Before carrying out work on the manufacture of a trailer, it is necessary to develop a detailed action plan and adhere to it.
The work plan for the manufacture of a trailer for a walk-behind tractor is as follows:
- At the preparatory stage, it is necessary to familiarize yourself with the device of the mechanism, analyze its functionality, depending on the power of the walk-behind tractor.
- Sketch the structure. Self-made trailer diagram will greatly simplify the work.
- Calculate the dimensions of the cart for the walk-behind tractor.
- Design a drawing of the trolley, on which to render the main units, parameters and dimensions of parts.
- Plan the principle of operation of the main and additional mechanisms, think over ways of connecting all nodes and parts, their functioning.
- Prepare a list of required materials and tools.
- Start the assembly and finishing process.
Depending on the ability to transport cargo, trailers are divided into 3 types:
- A simple 1-axle attachment for motoblocks with a load capacity of up to 70 kg. Its design is simple and inexpensive.
- Universal cart with carrying capacity up to 110-120 kg. It is often used in the household.
- Carts for a walk-behind tractor with a carrying capacity of over 120 kg. Such mechanisms are designed to move heavy loads, therefore, they have a more complex device, respectively, the cost of materials for the frame and cladding increases. The functionality of this technique is expanding.
Based on these parameters, the material is chosen according to its strength for the frame and finishing of the mechanism.
Materials and tools
To work, you need the following tools:
- grinder for cutting parts;
- welding machine;
- welding electrodes;
- regular construction square for measuring angles.
In the manufacture of a trailed structure, the following materials and parts will be needed:
- metal profile pipes of square or rectangular cross-section;
- wheels and springs;
- duralumin sheets 2 mm thick;
- steel sheets;
- metal corners;
- metal rod;
All parts, especially if these are remnants of old metal products, are carefully inspected for damage, cracks, cleaned of rust, cut off.
Do-it-yourself trolley for a motorized towing vehicle
A motorized towing vehicle (motorized dog) is a device for transporting goods, traveling through snow and wetlands. The towing vehicle itself has a caterpillar track and is complemented by a sled. A sleigh trailer is convenient in winter, provided there is a large snow cover, however, in summer or in snowless winters, using such a trailer is problematic.
Agricultural machinery manufacturers offer a wide range of trailers, adapters and carts, including those for a motorized towing vehicle. Some owners of such equipment create a cart with their own hands. Its device practically does not differ from a trolley for a walk-behind tractor.
The main difference between a motorized towing vehicle, which dictates the features of the device of trailers, is a caterpillar track. These vehicles are ideal for off-roading, so the trailer must meet the same requirements.
Two types of trailers are recommended for motorized dogs: a loading platform and a skidder. Both options are complicated in execution, so it is better to adapt the finished trolley for the walk-behind tractor. Drawings and dimensions for the trolley of a motorized towing vehicle and a walk-behind tractor will be almost the same, so you can use any.
The main feature of the trailer for this type of equipment is the low pressure wheels. They have a high shock-absorbing effect and are excellent for off-road use. A cart with such wheels can be used at any time of the year. This modification requires axle reinforcement from the bogie, as well as wheel attachment. All other parts of the cart can remain unchanged.
In order to understand how to make a cart to a walk-behind tractor with your own hands, you need to perform the following algorithm of operations:
- For the manufacture of a supporting welded rigid frame, take 5 pipe blanks, cut the ends with a grinder.
- Press with clamps to the chipboard sheet and weld the joints of 3 longitudinal blanks with 2 perpendicular ones so that they create a lattice frame.
- Check the geometry of the structure with a regular construction square. The angles of the connected ribs must be 90 °.
- Install spacers between the tacked workpieces in the corners of the bottom and in the center, tack with welding.
- To the longitudinal pipes of the bottom, make tacks with a welding electrode 4 vertical posts in the corners.
- Check the perpendicularity of the corners, check the dimensions of the sides of the structure with the dimensions in the drawing of the cart for the walk-behind tractor.
- Finally weld all the workpieces to each other, grind the welded seams, clean them of sagging and formations.
- The body can be made of plywood or wooden planks, while the corner joints are fixed with steel corners.
- Boards are mounted on the frame and bolted on.
- durable sides of the master are made of steel sheets. The sides can be hinged and fixed. Hinged sides of the body are considered more rational, because unloading cargo of large volumes is easier. The sides are also made of square or rectangular metal pipes. They are performed, like the frame, they are grabbed, the geometry is checked for strength and to avoid braces and deviations, they are finally welded, rigidly attached to the frame. The tailgate is fastened with ordinary door hinges and equipped with latches.
- Take a metal rod with a diameter of 30 mm and a length of about 1050 mm to make an axle for wheels, connect it with a longitudinal hinge and corner supports. The length should be chosen so that the axle does not go beyond the limits of the wheels. Sharpen it to the required diameters of the bearings in the hubs.
- As a running gear, you can take a wheelbase from a scooter, stroller, wheelbarrow or other agricultural machinery. Heavy wheels from a car trailer with hubs are not recommended to be installed.
- For the manufacture of the drawbar, take 2 profile pipes with a diameter of 25×50 mm and a length of about 1.85 m, weld them to the frame beam so that a triangular structure is obtained. For reinforcement in the corners, metal kerchiefs with a thickness of 4 mm are attached by welding, a plate with a thickness of 8 mm is attached in front of the trolley.
- Tipper technology provides for the installation of door hinges attached to the bottom of the beam and to the bottom struts.
- Sheathe the frame of the structure made with wooden boards, plastic or metal.
- The driver’s seat on a walk-behind tractor with a trolley is installed ready-made or in the form of homemade boxes from a piece of chipboard and foam rubber sheathed with dermantin. Such boxes are necessary to hide inventory and materials.
- The machine’s parking brake can be used as a brake. Fix the brake pedal made of 6 mm thick plate on the footrest under the seat, weld 2 corners. Install the pedal in the front part, in the back. a plate with 2 holes for fastening brake cables, the ends of which are connected to a T-shaped plate with a rod.
In this way, you can make a trolley for a walk-behind tractor with your own hands.
Motoblocks and cultivators on trailers consist of the following basic elements:
- hitch or drawbar;
- driver’s seat;
- steering gear;
To withstand heavy loads, a home-made cart for a walk-behind tractor is reinforced with special stiffeners.
For a 1-axle trailer, a manual device is sufficient. A 2-axle tipper wagon with a heavy lifting capacity must be hydraulically operated against tipping.
Do-it-yourself wheelbarrow for a walk-behind tractor
A wheelbarrow for a walk-behind tractor is an irreplaceable assistant in the household. Such a device allows you to transport goods (crops, garbage, building materials, etc.). You can make a trolley for a walk-behind tractor with your own hands from auto parts or from individual materials. In both cases, welding and certain design skills are required. The wheelbarrow assumes the simplest design; any drawing of a trailer for motoblocks is suitable for its creation.
For the Neva mb-2 walk-behind tractor, a mounted wheelbarrow with an H-shaped coupling is suitable. This type of connection is universal and easy to manufacture. The hitching point of the wheelbarrow and the walk-behind tractor is one of the most important units that receives a large load, therefore the materials for its creation must be strong, it is mandatory to check for defects (cracks, rust).
A wheelbarrow for a walk-behind tractor consists of a frame, sides and wheels. If you add a seat and a steering column to it, you get an analogue of a mini-tractor. Any of the options for a wheelbarrow for a walk-behind tractor can be made from improvised means, there are many photos and videos on the Internet with the process of assembling devices.
Do you use trailers, adapters and wheelbarrows for motoblocks?
Why is it needed?
The clutch transfers torque from the engine crankshaft to the gearbox or gearbox shaft, performing important tasks:
Walk behind tractor split: clutch fix
- Soft disconnection of the gearbox and the motor at the moment of braking without the need for a complete stop of the engine;
- Smooth gear shifting and ignition on;
Comfortable work without unnecessary vibrations and shocks, especially when cornering. the main advantage of a walk-behind tractor with a clutch. But its mechanism accounts for the greatest frictional force. Therefore, you will periodically need to repair or completely replace the clutch. We tell you how to make a clutch at home.
How to mount a clutch on a walk-behind tractor with your own hands?
In the hot season, the walk-behind tractor is able to “pull out” on itself most of the garden and garden work, provided that all systems in it work harmoniously.
The connecting element of the transmission of most modern units is the clutch.
First, prepare a drawing of the product. The simplest belt clutch. it is a movable structure consisting of an input shaft, a hub with a key and locking grooves, a bushing, a release lever, a driven pulley, a drive flywheel and a bearing.
Details of the future device can be found in almost every garage. a crankshaft from the Moskvich checkpoint, a hub from Tavria, a cable from an old chainsaw, etc. You can also purchase ready-made hardware.
- Turn the shaft so that it rotates freely without touching other components and install the hub on it.
- Cut holes for the bearing from the bottom and top of the crankshaft so that the flywheel “sits” tightly and rotates on it without interference. In this case, the hub must completely encircle the shaft.
- On the pulley, we drill six through holes with a diameter of no more than 5 cm at an equal distance from each other. We install the pulley over the flywheel on the shaft and fasten it with bolts.
- We mark holes on the flywheel and make them exactly in the same places as earlier in the pulley.
- Mount the clutch lever from a pipe with a diameter of 10 and a length of 30 mm and install on the pulley.
- Take a cable or cord and wind it around any cassette.
Such a design, of course, will not replace the factory disc clutch, however, it requires a minimum investment of time and money, and is suitable for almost all known brands of motoblocks.
Basic elements of the mechanical system
To support the main elements in the gearbox (creeper), a system of shafts and axles is provided. In single-stage designs, shafts with a rigid fit of the driven and driving gears are used. The firmness of the fit is achieved through the use of keys or splines. Lateral displacements are adjusted with special nuts that press the gears or sprockets against the thrust collars. Structural steel is used as a material. It is great for making a creeper for a walk-behind tractor or cultivator.
Bearing units are supports for steel axles and creeper shafts on the walk-behind tractor. Bearings bear the main load during operation of the power unit.
It depends on the correctness and quality of bearing seating whether the creeper for a motor cultivator will work normally. For self-made designs, bearings with closed cages (closed type) are better suited. This saves you the hassle of regular grease changes. The type of gearbox bearing depends on the type of load being absorbed. Support bearings are installed on a creeper for a walk-behind tractor with straight gears, and support bearings are installed on gears with an oblique tooth profile and worm shafts. They are usually subject to longitudinal axial forces from an electric motor or an internal combustion engine.
It depends on the correct selection of geometric dimensions and gear ratio whether the creeper for the walk-behind tractor will normally perceive dynamic loads from the power unit. When installing gears, all necessary clearances must be maintained. To do this, carefully study the drawings. Clearances directly affect the ability to handle significant loads from an internal combustion engine or electric motor.
The raising and lowering gearbox for a minitractor is lubricated with industrial oil of the I-20 brand. The oil level is determined taking into account the operating conditions of the unit. Stuffing box seals are used to prevent leaks.
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Homemade angular gearbox for walk-behind tractor
In principle, the gearbox does not have too intricate
structure, it is quite possible to assemble it yourself. Do the correct one first
calculation in nominal power (Pn); Pn = Pe (hp) xFS. This will allow you to make a choice
in favor of the correct angle to be determined for the bevel gear. By
this principle will calculate not only the number of possible revolutions per
one minute, but also the calculation of the torque.
DIY gearbox needs definition
conditions of his work. Among them there is a radial load, or axial
which are at the shafts, at their ends. Its work will be optimal if
correctly selected temperature, type of lubricant.
After completing all of the above steps, you can
go to assembly. The case can be selected from the factory. The diameter of the case will tell you,
what will be the housing of the bearings for the shaft. To help with calipers and good
quality drill. Next, we take two bearings under the shaft itself.
It is important to install the steel flange on the front
reducer. Accordingly, inside: bearing, necessarily flanged and washer.
The flange is attached to the generator itself, using screws
Steel key, together
with a driving gear and a driven shaft. gears must be selected in advance. TO
the rotary generator is connected to all nodes that are connected to the mechanism,
being the transmission. It has a pulley that provides a V-belt
transfer. It should be secured to the driven shaft using a spring nut.
The main types, their purpose
In the household, walk-behind tractors and cultivators are most often used. By design features, they can be installed:
- Gear mechanism. Bevel or spur gears are mounted on the drive shafts. This design allows them to be used in direct transmission of rotation from the engine. It can be used as an angular gearbox for a walk-behind tractor, while the design uses a bevel gear.
- The device is gear. worm. Most often installed with a vertical engine crankshaft. A gear with a specific number of teeth and a worm screw with a specific thread pitch are a schematic description of the type of device. The main feature is the transmission of rotation of the motor shaft at right angles.
- Chain device. The shafts are equipped with toothed sprockets. On them, a special chain is put on, with the help of which the torque is transmitted from the motor. For good performance, the chain is tensioned using a roller. tensioner.
- Belt device. Rotation is transmitted using belts. Pulleys with grooves for belts are pressed onto the shafts, the belt is tensioned with a tension screw.
Most often, in equipping the angular gearbox of a boat motor, walk-behind tractors and other mechanisms, a chain, gear or gear-worm gear is used. Previously, the main one was the belt system, due to breaks, slipping of the belt from the pulleys, its work was recognized as not reliable.
Motoblock and reverse gear for it
The clutch is located strictly between the gears of the bevel
type, freely located on the main shaft. This is how the diagram is presented
reversal in the gearbox, which, if you look at it, is not too
It only clings to the splines in the gears. This is what allows her to change
the direction of the helical gear. Cam, or the fork itself is the clutch.
A reduction gear is a device that is designed to convert torque. There are worm, planetary and combined modifications. The geared motor is capable of operating at high rpm. The standard model consists of a shaft, pushers and gear. If necessary, a step-down device can be made by yourself.
How to make a reduction gear
One of the main and critical parts of the reduction gear is its housing. The relative position of the axes and shafts, the clearances between the gears and the alignment of the seats for the support bearings depend on how correctly it is designed and manufactured.In industrial gearboxes, almost all cases are made by casting from cast iron or aluminum alloys, but at home it is practically unrealistic. Therefore, it would be best either to select and finish a ready-made body to suit your needs, or to make it welded from sheet steel. However, in this case, it must be remembered that during welding the metal can “lead”, and in order to maintain the alignment of the shafts, it is necessary to leave an allowance for the final processing of the bearing seats.
Some craftsmen act differently. in order not to suffer with boring work, they weld the body completely, and use pipe sections as bearing seats, which are set in the desired position and only then are finally fixed in place with bolts or welding. In order to facilitate the maintenance of the gearbox, it is recommended to make the upper case cover removable, and at the bottom of it provide a drain hole for the waste oil drain
The shafts and axles of the gearbox serve as a support for the gears. As a rule, in a single-stage gearbox, only shafts with a rigid attachment of gears are used (fit in tension, on a key or splines). That is, both gears rotate with their shafts. The axis is used when we need to insert an intermediate gear into the gearbox (for example, to ensure the same direction of rotation of the input and output shafts). Such a gear rotates freely with a minimum clearance on its axis, and from lateral displacement it is fixed either by a thrust collar and a nut, or by locking split washers. It is recommended to use steel 10. 45 as a material for shafts, which has sufficient strength and lends itself well to machining;
The bearings in the gearbox support the shafts and absorb the loads that occur during gearbox operation. The efficiency and reliability of the gearbox as a whole depends on how correctly the bearings are selected. For a homemade gearbox, it is better to choose closed-type bearings that are lubricated with grease and require a minimum of maintenance. The type of bearings depends on the type of load being absorbed. In the case of using spur gears, conventional single or double row ball bearings will be sufficient. If the gearbox has helical gears or a worm gear, then an axial load is transferred to the shaft (and, accordingly, the bearings). In this case, you will have to provide a roller or ball angular contact bearing;
Gears are equally important parts of the gearbox. It is with the help of the gearing that we change the rotational speed of the output shaft. For the manufacture of gears, special metal-cutting equipment is required, so it will be economically feasible to use ready-made parts from decommissioned units. It is on the geometric dimensions of the gears and their gear ratio that the center distance between the shafts of the gearbox will depend, as well as the layout of its housing
During the installation of the gears, it is important to correctly set the gap between them, since the load capacity and the noise level during the operation of the gearbox depend on this. Liquid industrial oil of the I-20 brand is well suited for lubricating gears, which is poured to such a level as to cover the teeth of the lower gear
The rest of the parts will be lubricated by spraying oil along the inner cavity of the gearbox;
Stuffing box shaft seals are needed to prevent oil from leaking out of the gearbox. They are mounted on shaft outputs and are usually fixed in bearing caps;
Safety clutch. In order to avoid accidental destruction of gearbox parts from excessive load, a so-called overload clutch is usually used. It can be in the form of a shear pin, spring-loaded friction discs or bellows and is selected in place;
Bearing caps. These parts greatly facilitate the installation and maintenance of bearing assemblies and can be blind or through. You can pick them up from finished parts or turn them on a lathe.
Motor block reducer device
Like any other mechanism of a walk-behind tractor, the reducer of an agricultural unit consists of certain elements. Taking into account the type of the gearbox, its design can be equipped with certain parts. Basically, the gearbox device in detail looks like this:
- Cover and pulley;
- Input shaft bushings;
- Adjustment and shift lever;
- Fork and shift axle;
- Gear wheel in the intermediate shaft;
- Shaft block;
- Double-row chain;
- Sprocket block;
- Washers and seals;
- Input shaft;
- Right and left axle shafts;
- Double asterisk;
- Bracket and spring;
- Clutch fork.
How the gearbox of the walk-behind tractor works will be described in more detail by the mechanism diagram below.
Despite the rather complex design of the mechanism, its dismantling and reassembly will not raise questions even for a beginner. This requires:
- Completely remove the gearbox from the walk-behind tractor;
- Unscrew the screws and remove the protective covers;
- Carefully remove the bushing on the input shaft, dismantle the lever and the fork, the switching mechanism;
- Remove the input shaft and gear from it;
- Remove the shaft bushings and the chain;
- Dismantle the shaft block and remove the sprockets from it;
- Remove the intermediate shaft together with the gears;
- Remove the clutch, left and right axle shafts.
After completing all the above steps, you get the walk-behind tractor gearbox in disassembly. After repair, the mechanism must be assembled in the reverse order.
Assembling a homemade cultivator
Its capacity is 1.4 liters. from. It is also suitable for use as a cultivator unit.
One of the most important stages of work is connecting the base with cutters to the trimmer.
This operation is greatly simplified if there is a reverse thread at the end of the shaft, to which the tooling is simply screwed. The trimmer DDE GB 32 RD is just such a model.
In this case, a nut of the required diameter is welded onto the steel tube. There are also trimmers that have a thread inside the shaft.
Gearbox for walk-behind tractor
Detailed step-by-step assembly of a homemade minitractor with a breakable frame: 150 photos with a description for building a tractor with your own hands at home.
Craftsman Gennady independently at home built a very practical mini-tractor with attachments, the design is made on a break-type frame, 4 x 4 drive, an engine is used for a walk-behind tractor. We recommend that you see all the photos of the main stages of work on the manufacture of homemade products.
Step-by-step instructions for assembling a homemade mini tractor 4 x 4 with a fracture frame.
We shorten the driveshafts taken from the VAZ classics.
We adjust the gearbox under the pulley.
Cut the half-shafts to the desired length.
New splines cut.
Tractor frame manufacturing process.
The fracture node is made from the front hub of the Lada.
Swing angle of frames.
Wheels from the walk-behind tractor.
13hp Honda engine.
Cases mount for gearbox.
Installing the engine to the frame.
Carved brake disc.
Assembling the pedal assembly.
Carved a pulley at the checkpoint.
Attachments for a tractor.
Here is such a mini-tractor made by craftsman Gennady from Grodno.
A few videos about a homemade mini tractor: plowing the field.
hilling with a homemade tractor.
David Bradley “Super Power” walk behind tractor (transmission / gearbox cut-a-way)
Planting potatoes with a tractor.
Homemade angular gearbox for walk-behind tractor
The walk-behind tractor gearbox can be made by yourself. To do this, you will need to calculate the rated power (Pn); Pn = Pe (hp) xFS, as a result of which the correct type of angle is determined for the bevel gear. Torque and RPM are also calculated.
You also need to determine the operating conditions of a home-made gearbox for a walk-behind tractor, which includes: radial and axial loads on the shaft ends, minimum and maximum temperatures, determination of environmental conditions, intermittent or non-intermittent operating cycle, type of lubricant.
After determining the technical parameters, you can start assembling the bevel gear.
To do this, select the bevel gearbox housing.
For example, you can use a factory one, from a Ural or Dnepr motorcycle. Then, based on the diameter of the gearbox housing, we make the gear shaft bearing housing from steel. Here we use an appropriately sized drill and a vernier caliper. Then, in accordance with the intended dimensions, we select the gear shaft bearings (2 pcs).
Install a steel flange on the reverse side of the gearbox. It will have a steel washer and a flange bearing inside. Using a few screws, attach the steel flange to the generator body. Before that, we select the driven gear shaft, steel key and drive gear. All units are connected to the transmission mechanism and the shaft of the rotary generator. The V-belt pulley is located on the transmission mechanism and is attached to the driven pinion shaft with a nut and a spring washer.
To assemble a homemade bevel gear, you will need the following tools: a vernier caliper and a ruler, a straight and Phillips screwdriver, metal drills, files and files for metal, wire cutters and pliers, rubber gaskets, a vice and a hammer.
Gearbox for walk-behind tractor
Motoblocks with a gear reducer and a reduction gear for a walk-behind tractor
A reduction gear for a walk-behind tractor, in the common people a creeper, is installed on modern diesel and gasoline air-cooled walk-behind tractors. Thanks to this, the user can use the walk-behind tractor on especially heavy soils for plowing and digging out potatoes. Reduction gear helps with wheel slip when its own power is not enough.
How to make a gearbox for a walk-behind tractor with your own hands
There are several important differences between the worm and chain gearboxes for a walk-behind tractor: gear ratio, efficiency, number of shafts and gears, angular speeds and power.
What are the gearboxes for the walk-behind tractor
Non-collapsible gearboxes are usually installed on cheap walk-behind tractors. The design of such a unit is not particularly reliable. It also has a short service life. In addition, it is impossible to carry out repairs or disassembly-assembly. In the manufacture of such units, low-quality metal and non-cased parts are used. In order to understand why it is impossible to use the gearbox for a long time, you need to familiarize yourself with its diagram.
It is customary to install collapsible gearboxes on expensive walk-behind tractors. Thanks to this, you can disassemble the gearbox of the walk-behind tractor and carry out maintenance. They repair the gearbox of the walk-behind tractor to increase the service life, if high-quality spare parts are used when replacing faulty elements.
It is imperative that you regularly diagnose the gearbox in order to repair the required unit in time. Regular lubrication of the gearbox must also be carried out, which will allow the unit to be used for much longer.
Most often, a gearbox for a walk-behind tractor is used to convert a high angular speed to a low one. The input shaft shows a high speed and the output shaft shows a low speed.
In order to avoid unexpected breakdowns, it is necessary to carry out regular maintenance in order to successfully operate the agricultural machine. If the change in the angular speed occurs in steps, the gearbox is called a gearbox, if the change occurs continuously, it is called a variator.
Motoblocks with gear reducer
To understand what a gear reducer is, consider the structure of the transmission. It transfers torque from the engine to the wheels, and changes the speed and direction of the walk-behind tractor. The transmission consists of a gearbox, differential, gearbox and clutch. Transmission units are gear, chain, belt or combine one or the other.
The gear transmission consists of bevel and spur gears (gear reducer). It is used on some models of cars and heavy walk-behind tractors. The figure shows the gear transmission of the NMB-1 motor-block “Ugra”, where a gear reducer is used.
Yak zrobiti self-propelled walk-behind tractor with his own hands
This article reveals the topic of how to assemble a walk-behind tractor at home to modernize farm hard labor on land plots. Plowing, weeding, digging, loosening, sowing seeds, harrowing, hilling, fertilizing the soil, cultivation, transportation of goods, harvesting. all this and other agricultural operations will be performed in a short time, replacing completely manual hours of labor. With the help of additional attachments, the walk-behind tractor can be used to remove dry foliage, caked snow, and also use it for drilling and sweeping. If you want to save a tidy sum and a lot of time, you need to understand the design of this device.
The design of the unit is simple. it replaces an ox or horse, which in the old days had to be dragged along with a bridle. The minitractor and the motorized tractor do not always reach hard-to-reach places due to their large dimensions. A walk-behind tractor, unlike its “brothers”, is able to reach and process even the most difficult to reach place.
What parts are needed to assemble a homemade walk-behind tractor?
In order to make a frame, prepare:
- Steel pipes 6 x 5 x 0.2 cm
- Steel corners 3.6 x 3.6 cm
The main tools are used in the work:
- Welding machine
- Grinder with disc for cutting metal
- Powerful drill
- Spanner wrench set
The following tools come in handy from the old technique:
- Fuel tank
- Exhaust system
- Kick starter
- Steering control system
- Air filter
Methods for assembling a walk-behind tractor
Let’s take a look at the three most popular assembly methods. One of them is assembly from a car, the other is from a chainsaw, the third is from a motorcycle.
Step-by-step instructions for making a walk-behind tractor yourself
- Make a transmission. To do this, you need to make an intermediate shaft with 2 sprockets. If 1st gear is needed, the working gear can be used. The chain drive remains the main one. It is important that the 2nd sprocket matches the ratio of teeth 1: 4.5.
- Frame welding. For its manufacture, it is best to use steel pipes and corners. To secure the engine strut, weld it to the front of the frame.
Assembling a walk-behind tractor from a chainsaw
If an unnecessary saw is lying around somewhere in the garage, then you can easily convert it to a motor cultivator. Here you can not do without understanding the drawings. A drawing for a walk-behind tractor from a chainsaw is necessary primarily in order to be able to maintain the highest accuracy during installation.
Recommendation: It is better to take a powerful, compact and lightweight chainsaw with high performance to create a cultivator.
- Frame creation. It needs to be made in a cubic shape with corners measuring 32 x 32 cm.
- Installing the engine. It should be attached to the cross member of the frame.
- Install the fuel tank. It is installed under the frame cross member. It is best to use brackets to implement this item.
- Weld bearings on the support.
- Steering creation. Weld the center of gravity to the wheel support, which is located above the wheelbase. The ignition switch for starting the engine will suit absolutely any.
The advantages are obvious: there are no serious requirements for lubrication and fuel, it works in an autonomous mode, it can be used in hard-to-reach places. In addition, such a homemade cultivator made from improvised means is very compact and lightweight.
We will also highlight the drawings as a separate item. Before starting work, we recommend that you carefully look at them. For this, the manual for any mini walk-behind tractor is suitable. Gardenshop store has collected for you the necessary drawings for assembling a walk-behind tractor with your own hands.
Assembling a walk-behind tractor from a car
Any car is suitable for this. What tools will be needed?
- Onboard reducers
- Front suspension
- Steering rack
At the very beginning of the assembly, you need to weld a strong metal pipe up to 10 cm in size to create an axis. On both sides of the end of the pipe, you need to weld ball bearings to the body, then attach the wheels from the motorcycle to them. A gearbox from the same motorcycle must be attached to the pipe by welding the brackets. After carrying out such a cycle of work, it is possible to install a full-fledged engine on the basis of the ZAZ gearbox. The last step is to attach the implement control handles to the vertical holder.