If you decide to make a home-made walk-behind tractor from a motorcycle engine, the main condition is to make the most of the used motor equipment components, redoing them as little as possible. This will require some experience and accumulated knowledge, with a large supply of patience and work. The result of the summed up work will be a reliable farm machine, adapted to almost any conditions. If a malfunction occurs, the repair will be the replacement of a broken part, or a failed assembly.
For example, if we take a sub-frame or a power unit: they are manufactured at the factory. If we consider the reducer-adapter, it is taken from the main gear of the motorized carriage.
We make a homemade walk-behind tractor from a motorcycle engine
For the successful operation of the walk-behind tractor, a multi-stage kinematic transmission scheme was developed, which increases the accessory ratio, as well as tractive effort and torque. Together with the adapter reducer, the main reducer is provided in the kinematic diagram. When combining the gearbox with a wheel pair and final drive, a highly efficient propulsion unit is obtained.
A special mechanism tensions the drive chains. It is attached with studs to the sliders, which are made of a steel corner. The latter are also able to move by tightening or loosening the drive chain. For this purpose, grooves are provided in the sliders and there are two adjusting screws and M10 mounting bolts.
The most time-consuming design is the main gearbox. It is made from pre-prepared steel plates (10 mm). Reinforcement discs are placed at the bearing installation site. Welds are solid to prevent oil leakage. A bracket-bracket is welded onto the rear wall of the gearbox, which allows you to mount a cargo trolley or a trailed agricultural implement. If you use a cargo trolley, then the walk-behind tractor becomes a mini tractor.
A steel plate (5 mm) is used to make the gearbox cover. It is attached to the body with M6 screws. Cylindrical spur gears and shafts are taken from agricultural machines. It must be remembered that the purpose of the intermediate shaft is power take-off, so it is better to make new shafts than to use old ones. The differential of the main gearbox on the walk-behind tractor was part of a decommissioned electric car.
Blocking the wheels of a walk-behind tractor with an engine from a motorcycle
Wheel blocking is a necessary technical solution for a walk-behind tractor, from a design point of view. On the right axle shaft, where the splined end is, a cylindrical neck is machined, which should be slightly deeper than the splined groove. A threaded hole is made from the opposite end of the axle shaft.
When the M12 adjusting screw rotates, the axle shaft is shifted due to the action of the coil spring. Further inside the differential, the axle shaft moves away from engagement with the “native” gear and engages with the adjacent one, which blocks the wheels.
The impellers of the walk-behind tractor are made from the wheels of a decommissioned electric car. For each disc, 16 grooves are cut in the rim, and steel plates are welded in, which will serve as the basis for the lugs. After that, jumpers are welded to them, and the rims of arable wheels are obtained.
Plow for motoblock
The unit that regulates the entry of the plow into the soil is very effectively made. It consists of a welded U-shaped body, with mounting and restrictive ledges. The heel of the plow cooler is inserted into them, which is able to rotate in a vertical plane using a bushing-axial hinge. The required angle of rotation is set with an M16 pin. A channel beam is welded to the pivoting heel. Thanks to a slight turn to the side where the soil falls off the plow, it becomes possible to correctly install the latter.
The cutting knife is also attached to the bed. In order to install it at the right angle to the ground and to the required value, a standard clamp with a plate-plate and two M12 bolts with nuts is used. An auxiliary wheel is placed in front of the walk-behind tractor on a V-shaped bracket. Its purpose is to ensure ease during transportation, or when moving the walk-behind tractor backwards.
The walk-behind tractor is controlled by two rods from a mower with handles. Also for this, the reverse and speed switch knobs are used.
The performance of the walk-behind tractor is three to five acres of land per hour. Ordinary land can be plowed in second gear. For heavy soils work on first.
How to make a do-it-yourself walk-behind tractor from a planet engine
The scheme for creating this walk-behind tractor is perfect for Voskhod, Minsk, Ant engines. The engine from IZH Planet -3 proved to be the best. To make a walk-behind tractor with your own hands from the planet's engine, you need to make small design changes.
Engine cooling is forced, connected through the ignition - to the coil. Engine power 18 hp Thanks to the installed gearbox, there is a reverse gear.
Transport speed - up to 70 km / h. The minimum speed is 5-6 km/h. The trolley is made from two old tarsion-type wheelchairs, and can withstand weights up to 500 kg.
A frame is welded to the channel. When modeling a walk-behind tractor, it is necessary to take into account the engine mount, so we offset the longitudinal axis of the gearbox by 10 mm relative to the engine axis. The engine can be mounted in different ways. To increase engine power, an additional shaft cuts into the channel.
After that we place the fuel tank. Upon completion of the assembly, we give the walk-behind tractor a beautiful appearance by painting.
This walk-behind tractor is capable of driving 50-70 km per day. On asphalt, you can keep the speed of 50-60 km / h. You can use it as a vehicle, and as a walk-behind tractor.
Do-it-yourself motoblock from a motorcycle video selection
To assemble a walk-behind tractor from an IZH, Vostok or Ural motorcycle, you will need to prepare drawings for the future unit. They indicate the dimensions of the structure. Any homemade products from a motorcycle are made subject to minimal tuning of used motor equipment components. This requires some experience and knowledge in this area.
To make a homemade walk-behind tractor from a motorcycle of any model, it is recommended to develop a multi-stage transmission. Such a gearbox will increase the ratio, traction and torque. The main element of the design is a gearbox with an adapter.
The mechanism that tensions the chains is fixed to the sliders with pins. The last details can be made from a steel corner. They are easily moved, which provides loosening or tensioning of the drive chain. To do this, we make grooves in the sliders.
It is more difficult to complete a home-made walk-behind tractor with a main gearbox. Steel plates are used for its assembly. A bracket is welded behind the gearbox, which makes it possible to equip a mini tractor with an engine from a motorcycle with any attached agricultural equipment (plough, cultivator). The gear is dismantled from the agricultural machine.
Motor cultivators require wheel locks. To do this, machine the cylindrical neck of the right axle shaft. At the other end, a thread is cut. The impellers are dismantled from the electric car. We cut 16 grooves in the rim of each disc. The plates welded into the structure serve as the basis for the lugs. Jumpers are welded to them. A homemade walk-behind tractor is controlled by 2 rods from a mower. The productivity of the received equipment is 3-5 hundred square meters per hour. Ordinary soil is plowed in second gear, and heavy soil is plowed in first.
simple technique
To assemble a walk-behind tractor for plowing ordinary soil with your own hands, use the engine from the Karpaty moped. To increase the power of the power unit, it is recommended to equip the equipment with an additional shaft. More powerful equipment can be made from a motorcycle Voskhod, Ant, Minsk.
A home-made walk-behind tractor, equipped with an engine from a Voskhod motorcycle, has a power of 13.5 hp. The ignition is dismantled from the Vyatka-Electron scooter. To maintain the normal operation of the motor, forced cooling is equipped. To do this, we use a supply type fan. The gearbox housing, dismantled from the ZIL-130, is used as the basis for the frame. To this design we weld the racks of the subframe of the power unit. We cut the receiver itself to 243 mm. We install a carburetor, gas tank on the subframe.
To assemble the drive shaft, use pieces of splined shafts from the following units:
- gearbox from ZIL-130;
- transfer case from GAZ-66.
The crankcase is fixed to the gearbox housing, in which we cut out a window for fixing the gears. The next stage is the manufacture of wheels. Experts recommend welding steel wheels. We weld a rim to the disk, to which lugs are welded (16 pieces).
To make control levers for motor vehicles, we use a steel pipe. At the top we connect the levers with a cross member, and at the bottom we weld the flanges. To shift gears, you need a handle. It can be installed on the left control lever.
To attach attachments to a walk-behind tractor equipped with a motorcycle engine, a suspension and adjustment units are made. A bracket is used to fix the first element. The downside of homemade agricultural machinery is the lack of a differential. It will take extra effort to turn around. But such a constructive solution has its plus - the movement of vehicles without adjustment by the driver.
Powertrain cooling
Before making a minitractor with an engine from a Ural motorcycle, a scheme of a forced cooling system is being prepared. Without it, the motor will overheat. Experts do not recommend equipping a liquid cooling system.
The principle of such a system can be taken from motor vehicles (transfer of force from the crankshaft to the fan). We cut a thread at the end of the pulley. To fix it to the crankshaft, you need an M7 screw. The supply fan is equipped with 4 petals cut from a steel sheet. The fan shaft is presented in the form of a driven pulley design.
The shaft bearing is installed in the housing. For the manufacture of the protective ring, we use a steel sheet 3 mm thick. We mount the housing with bearings on 4 steel spokes in the center. To fix the ring to the motor, you will need 3 brackets. The guide casing is made of duralumin. This detail reduces the dispersion of air flow from the fan.
A home-made mini tractor is equipped with a gearbox from Pobeda, a bridge from Moskvich 408. The wheels can be removed from the UAZ, and the wheels from Volvo. To change the direction of rotation, turn the gearbox 180º on the bridge. With the help of chains, you can get compact mini-equipment (the length is like the "Ural").
To assemble a heavy walk-behind tractor, an engine from an IZH motorcycle is used. Since the speed of movement of equipment during operation is low, a forced cooling system is therefore installed. To do this, use an electric fan or a device with a drive. To direct the flow of air masses to the working cylinder of the power unit, a protective cover is installed.
With the help of a home-made walk-behind tractor from an IZH motorcycle, large areas of land can be cultivated.
The idea of how to make a homemade gearbox for a walk-behind tractor was taken from the Modeler-Constructor magazine, the design of the unit was redesigned in accordance with the following requirements: exclude chain transmission from the transmission design, ensure the lowest possible center of gravity. Since the necessary gearbox was missing, the transmission was made from spare parts of gears for the engine of the Elektron scooter.
Motoblock: 1 - engine; 2 - casing; 3 - gas tank; 4 - ignition coil; 5 - switch; 6 - pin for fixing the angle of inclination of the working body (not shown conventionally in the top view); 7 - bolt M16; 8 - axis of attachment of the working body; 9 - working body (plow); 10 - holder; 11 - frame; 12 - carrier with control handles; 13 - wheel with lugs.
We make a homemade gearbox for a walk-behind tractor
To make a home-made gearbox for a walk-behind tractor, parts were taken from the V-150 M engine: crankcase, gears, chain sprockets, as well as an additional gearbox shaft. The crankcase must be cut into two halves and the kickstarter, gearshift mechanism and crank chamber removed from it. At the exit point of the kickstarter, it is required to install a plug and weld it using argon welding.
In the left half of the crankcase we install the bearing box of the right running wheel of the walk-behind tractor. A spare crankcase of the same engine is used as an axle box.
As the left cover, a part of the crankcase of the V-150 M engine is also used, which is supplemented with one part - a duralumin bushing. The sleeve is pressed into the crank chamber and has a hole corresponding to the diameter of the engine output shaft shank.
Chassis of a walk-behind tractor
- 1 - right wheel;
- 2 – left wheel;
- 3 – a gear wheel of the first transfer;
- 4 - drive shaft;
- 5- reducer;
- 6 - drive gear;
- 7 - bushing;
- 8 - locking screw;
- 9 - housing of the drive shaft;
- 10 - box flange;
- 11 - nut and bolt M8;
- 12 - slotted sleeve;
- 13 - shaft;
- 14 - nuts M14;
- 15 - washer;
- 16 - stuffing box;
- 17.18 - bearings;
- 19 - engine.
Walk-behind tractor drive shaft
- 1,2 - cantilever parts of the shaft (from the secondary shafts of V-150 M gears);
- 3 - gear wheel (from the gear of the first gear V-150M);
- 4 - front part of the shaft (bar d22 mm);
- 5 - cut off shoulder.
The motor and gearbox are fixed relative to each other by means of an M10 screw.
How to make a homemade walk-behind tractor with an ant gearbox
The two-stage chain reducer is designed to reduce the speed of rotation and increase the torque transmitted from the output shaft of the power unit of the walk-behind tractor to wheels or cutters.
Chain reducer drawing
1 - body made of channel No. 20); 2 - cover from Art. sheet s5); 3 - gasket made of oil and petrol resistant technical plate) 4 - drive sprocket of the second stage (z = 11, t = 19.05); 5-key; 6 - bearing 206 (2 pcs.); 7- compensation sleeve; 8 - shaft; 9 - nut M22x1.5 with a spring washer; 10 - stuffing box; 11 - remote bushing with keyway; 12-eccentric bearing housing (St3, 2 pcs.); 13 - M8 screw with spring washer (30 pcs.);
14 - driven sprocket of the second stage (z = 25, t = 19.05); 15- bearing 3008 (2 pcs.); 16 - bearing housing; 17 - sealing sleeve; 18 - left axle shaft; 19-oil drain plug (M10 screw); 20 - the bottom of the hull from Art. sheet s4); 21 - oil filler plug (Ml0 screw); 22.23 - oil seals (2 pcs.); 24 - right axle shaft; 25 - fixing screws M6 (8 pcs.); 26 - M8 bolt; 27 - chain t = 19.05; 28 - driven sprocket of the first stage (z = 57, t = 12.7); 29 - remote bushing
The first stage of the gearbox includes two sprockets with 17 and 57 teeth, respectively, with a pitch of 12.75 mm. The 17-tooth drive sprocket sits on the output shaft of the power unit, the driven sprocket sits on the outer flange of the second stage input shaft.
The second stage of the gearbox is reinforced and made with an 11-tooth drive sprocket and a 25-tooth driven sprocket, the tooth pitch is 19.05 mm. Since during the operation of the walk-behind tractor the second stage is located close to the cultivated soil, it is protected from dust by a closed crankcase, which is directly connected by welding to the crossbars, and the crankcase is connected to the spars by welding through steel spacers.
A strut is welded between the crankcase and the cross member for reliability. The crankcase is welded from two channels No. 2 with shelves, which are reduced in length to 35 mm. In the lower parts of the walls of the channels have the shape of a semicircle, instead of cut shelves, the bottom is welded from a steel sheet of 4 mm, which is curved along the walls of the channels in the form of a semi-cylinder. From above, the crankcase is closed with a cover with a gasket made of oil and petrol resistant technical plate.
Two coaxial holes d = 100 mm are made in both walls for bearing housings. Around each of them, six other threaded holes with M8 thread are evenly made, the purpose of which is to fasten the housings to the crankcase. The lower bearings of the semi-axes have conventional housings, the upper bearings of the shaft have eccentric housings. By turning them around the axis by at least 15 °, the chain tension of the second gear stage is adjusted in steps.
The shaft of the second stage of the gearbox is mounted in two ball bearings 206. By means of two spacer bushings, the drive sprocket is fixed exactly in the middle between the inner walls of the crankcase and is connected to the shaft by means of a parallel key. A large driven sprocket sits on the centering boss of the right axle shaft, fixed with six M8 bolts between the opposite flanges of the axle shafts. The lower part of the large driven sprocket and part of the chain are constantly immersed in oil.
The moving chain, when the motoblock engine is running, transfers oil to the upper part of the crankcase - thus lubricating the rubbing parts of the second stage is organized. To prevent oil leakage, stuffing box seals are provided in the bearing housings. A rigid flange connection of the axle shafts forms a single shaft mounted in two 308 ball bearings.
Homemade gearbox for walk-behind tractor photo selection
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Do-it-yourself shovel for a walk-behind tractorI understand that both walk-behind tractors are Chinese.
Just a limited budget.
Eduard GT 700 is better, it is faster and has more power
Arthur Better Motoblock - cultivator Patriot Chicago Sasha, cheaper, but no worse.
If you choose from those presented by you, my choice is a foreman.
Tags: How to, make, walk-behind tractor, from, ant, video
self-made walk-behind tractor from ICE T-200 (Ant) plow
how to make a motoblock how to make a walk-behind tractor from an ant scooter? | Topic author: Vyacheslav
I understand that both walk-behind tractors are Chinese. Just a limited budget.
Igor
Anton For this you need hands and a head... . nothing else matters.
Homemade walk-behind tractor with a motorcycle engine, video...
Jump to How to make a do-it-yourself walk-behind tractor from an engine ... - The scheme for creating this walk-behind tractor is perfect for Voskhod, Minsk, Ant engines. Best of all myself ... To make a walk-behind tractor your own ...
How to make a mini-tractor from a walk-behind tractor - Udec
The home-made mini-tractor from the walk-behind tractor described below was created from the parts of the Ant cargo scooter - it is excellent ... You can make such a mini-tractor yourself from scrap: various components and parts from ... Watch the video "Home-made mini-tractor" to clearly see how...
All motoblock units are based on one frame. Frame design: two spars, the front and rear ends of which are bent up, and the front ends are also opposite and connected by welding. To the rear ends, also by welding, a design from the Izh motorcycle is attached - a steering wheel with control levers. The material of the spars is a steel water pipe (an inch and a quarter).
Do-it-yourself frame drawing of a walk-behind tractor
Motoblock frame: 1 - steering wheel (from the Izh motorcycle); 2 - bracket for fastening the instrument panel (corner 25 × 25); 3 - platform and battery mounting bracket; 4 - frame spar (pipe with a diameter of 32); 5 - chain drive housing of the second stage; 6 - subframe; 7 - first stage power transmission chain tensioner (M10 bolt); 8 - emphasis of the chain tensioner; 9 - strut (pipe with a diameter of 22); 10 - bracket for attaching a cultivator subframe (milled channel No. 8); 11 - bracket for attaching a transport trolley; 12-crossbar (strip 30x4.3 pcs.)
The spars are connected along the length by several crossbars. The front of them is a stop for the chain tensioner of the 1st transmission stage. Some parts of the walk-behind tractor also serve as crossbars - for example, a platform for a battery.
One of the frame components, the gearbox housing, also serves as a stand between the power unit and the chassis. A cultivator subframe or a two-axle trolley for transporting goods can be hooked to the lower rear of the crankcase.
Motoblock engine
In the design, I used a two-stroke gasoline 13-horsepower motor of the cargo scooter "Ant" has forced air cooling. This is an indisputable plus in a situation of inevitable overheating of the motor due to low speed. The four-speed gearbox is interlocked with the engine, the muffler is homemade: a steel pipe filled with metal shavings (pipe length 250 mm, diameter 70 mm, exhaust port 16 mm). The exhaust tract has a complex shape, due to the layout of the walk-behind tractor and the fact that the exhaust must be to the side.
The frame on which the engine is located is a skid, to the cross members of which an arc from a water pipe (d = 42 mm) is welded. Brackets-brackets are welded to the arc in the center and at the ends.
Underframe
1 - slide skid (corner 40 × 40, 2 pcs.); 2- rear cross member; 3 - ridge (steel pipe 1 1/4 "); 4-bracket-bracket (StZ, strip 50×4, 3 pcs.); 5 - middle cross member: 6 - front cross member; 7 - traverse (corner 32×32); details 2,5,6 are made of steel strip 40×4
In place, along the holes in the ears on the engine crankcase, holes were drilled in the brackets for M8 bolts, after which the arc was installed on the spinal side and welded to the middle cross member of the slide, the extreme cross members were brought under the arc, bent, and their middle was also knocked out in place so that the crossbars are in contact with the arc over their entire width. Then the arc was attached to the crossbars by welding along the lines of contact, and the ends of the crossbars were welded to the guide rails, made from an equal-shelf 40 mm steel angle.
Engine Dimensions and Mounting Points
In the center of the vertical flange of the traverse, welded from above to the front ends of the guides, a hole for the bolt was drilled. The bolt (M10) also enters the front cross member of the frame and is designed to adjust the chain tension from the 1st stage of the gearbox. The sled moves along the spars in the longitudinal grooves (there are four of them, two in each skid). The subframe is mounted on the main frame through the grooves with four M10 bolts.
chain reducer
The two-stage chain reducer is designed to reduce the rotation speed and increase the torque transmitted from the output shaft of the power unit to the wheels or rippers.
Chain reducer drawing
1 - body (channel No. 20); 2 - cover (StZ, sheet s5); 3 - gasket (oil-resistant rubber) 4 - drive sprocket of the second stage (z = 11, t = 19.05); 5-key; 6 - bearing 206 (2 pcs.); 7- compensation sleeve; 8 - shaft; 9 - nut M22x1.5 with a spring washer; 10 - stuffing box; 11 - remote bushing with keyway; 12-eccentric bearing housing (St3, 2 pcs.); 13 - M8 screw with spring washer (30 pcs.); 14 - driven sprocket of the second stage (z = 25, t = 19.05); 15- bearing 3008 (2 pcs.); 16 - bearing housing; 17 - sealing sleeve; 18 - left axle shaft; 19-oil drain plug (M10 screw); 20 - bottom of the body (StZ, sheet s4); 21 - oil filler plug (Ml0 screw); 22.23 - oil seals (2 pcs.); 24 - right axle shaft; 25 - fixing screws M6 (8 pcs.); 26 - M8 bolt; 27 - chain t = 19.05; 28 - driven sprocket of the first stage (z = 57, t = 12.7); 29 - remote bushing
The 1st stage of the gearbox consists of two sprockets (17 and 57 teeth with a pitch of 12.75 mm). The drive sprocket (17 teeth) is mounted on the output shaft of the power unit, the driven one - on the outer flange of the input shaft of the 2nd stage. 2nd gear stage - reinforced (11-tooth drive sprocket, 25-tooth driven sprocket, tooth pitch 19.05 mm). Since this stage is close to the cultivated soil during the operation of the walk-behind tractor, it is placed in a closed crankcase to protect it from dust, welded directly to the crossbars and to the spars through steel spacers.
A strut is welded between the crankcase and the cross member for reliability. The crankcase is welded from two channels No. 2 with shelves reduced in length to 35 mm. In the lower part, the shape of the walls of the channels is a semicircle, instead of the shelves that are cut off, the bottom is welded from a 4-mm steel sheet, curved in the form of a semi-cylinder along the walls of the channels. From above, the crankcase is closed by a cover with a gasket made of oil-resistant rubber.
Both walls have two coaxial holes for bearing housings (d = 100 mm). Each of these holes is flanked by six other threaded holes (M8) for attaching the housings to the crankcase. The lower bearings (that is, the axle shaft bearings) have conventional housings, the upper ones (shaft bearings) have eccentric ones. By turning them around the axis (at least 15 °), the chain tension of the 2nd stage of the gearbox is adjusted in steps.
The shaft of this gear stage is mounted in two ball bearings 206. The drive sprocket is fixed with two spacer bushings between the inner walls of the crankcase, exactly in the middle, and is connected to the shaft with a parallel key. A large driven sprocket sits on the centering boss of the right axle shaft and is fixed with six M8 bolts between the opposite flanges of the axle shafts. Its lower teeth, along with the chain links on them, are constantly immersed in oil. During the operation of the walk-behind tractor, the oil is transferred by the chain to the upper part of the crankcase - thus, the rubbing parts of the 2nd stage are lubricated. Oil seals in the bearing housings protect against leakage of oil to the outside. The rigid flange connection of the axle shafts forms a single shaft placed in two 308 ball bearings.
Homemade wheels
Through the slotted cuts at the ends of the axle shafts, the torque is transmitted to the rippers or to the wheels. The rippers are homemade, the wheels with 5-10″ tires are borrowed from the SMZ motorized stroller. In order to improve the grip of the wheels with the ground in winter or when cultivating the soil, a home-made tire is put on the tires from a steel strip with a section of 90 x 5 mm with lugs from an equal-angle 25 mm angle.
Homemade lugs
Collapsible bandage with lugs: 1 - bandage semi-ring (steel strip 60 × 5.2 pieces); 2 - hinge loop; 3 - locking lug; 4 - transverse grouser (corner 25 × 25, 11 pcs.); 5 - diagonal grouser (corner shelf, 12 pcs.); 6 - M8 bolt of the locking device (2 pcs.); 7 - reciprocal half of the locking device (corner 25 × 25)
The slipping of the bandage from the tire is prevented by the antennae on the lugs with parts of the vertical shelves cut off on their sides. The antennae are bent inside the bandage hoop, and the cut parts of the shelves are welded to the hoop obliquely between the corners. The bandage hoop is composite: its two halves are connected by a hinge on one side and a locking device on the other (a similar locking device is used on the cover of the gearbox housing). It is convenient to mount such a hoop on tires.
Cultivators (one, two or three legs) are mounted on a T-shaped composite subframe made of a 60 x 40 mm rectangular tube. The traverse can be detached. These parts are factory-made, they are picked up at the dump of agricultural machinery. In the front part of the subframe, a coupling device from channel No. 6.5 is welded.
Cultivator subframe
1 - traverse; 2 - bracket (2 pcs.); 3 - M12 bolt (3 pcs.); 4 - flange for fastening the traverse (corner 30 × 30.2 pcs.); 5 - bolt M8 (4 tt.); 6 - ridge; 7 - coupling device (channel No. 6.5); 8- M8 bolt for fastening the subframe (2 pcs.); 9- counterpart of the coupling device (milled channel No. 8: the size between the shelves is 65 mm); 10 - an earring for attaching a trolley; 11 - gearbox housing; 12 - king pin (pipe diameter 22 with M22 thread and M22 nut); parts 1,2,6 are made of steel rectangular pipe 60×40; a - three rectangular holes for racks of cultivator legs (dimensions in place)
For connection, the subframe is inserted into the bracket on the frame (gear housing). Bracket material - channel No. 8 with shelves milled so that there is 66 mm between them. The subframe and bracket are connected with M8 bolts.
The use of a walk-behind tractor paired with a single-share plow (also home-made) had to be abandoned, so it was difficult to work with such a kit, and things progressed slowly. The role of a homemade plow for tillage is performed by two rippers (two cutters, that is, several knives with cutters) installed in place of the wheels.
Rippers
Assembly elements of the ripper: a - slotted sleeve with four flanges and end washer; b - knife with a cutter (16 pcs.)
The cutters are fixed with M8 bolts on flanges mounted on the bushing and welded to it. The diameter of the splined part of the axle shaft is slightly smaller than the diameter of the bushing. The material of the knives is a steel strip 50 x 60 mm, the cutters are from a decommissioned mower. For loosening the soil, one or two paws are installed in the cultivator subframe, which create a braking moment. In this case, during rotation, the rippers slip, go deep into the soil and finely crush it. By varying the number of paws and varying degrees of their deepening, you can adjust the braking torque. If it is adjusted, the walk-behind tractor moves evenly forward by itself and is easy to control. When handling ups and downs, you will have to adjust the braking torque manually, with an effort on the steering wheel, plunging the blades deeper or shallower into the soil. The depth of processing with rippers, like with a conventional shovel, is about 20 centimeters. The soil after loosening is soft, even, and does not need to be harrowed.
Homemade trailer
As mentioned above, the walk-behind tractor can be converted into a vehicle for cargo transportation, with a two-wheeled semi-trailer trolley. It turned out to be very easy to make a trailer for a walk-behind tractor with your own hands. The undercarriage of the trolley is the front axle of the SMZ motorized carriage, assembled (with wheels). The main frame is two spars with two crossbars made of steel pipe, in the section of which a rectangle is 60 x 30 mm. In the front part, where the side members converge, is the seat.
The drawbar of the cart is stepped so that the hitch is closer to the axle of the wheels. The result is handling that is as easy as articulated-frame designs. Half-inch tube struts are designed to reinforce drawbar steps. Footboards are welded to it from below. The design of the hitch is relatively simple: like a swivel, so that you can turn on uneven roads or slopes, about a horizontal longitudinal axis.
In the upper part of the main frame there is a frame that borders the cargo platform, from an equal-shelf 35 mm steel angle. Additional connections were created to strengthen the structure: the bogie frame is connected to the bridge levers through racks reinforced with struts (racks from the same pipe as the frame). The frame-edging of the platform is lined with a grooved board 25 mm thick. In further author's developments, removable or folding sides are provided.
The electrical equipment of the walk-behind tractor is designed for a voltage of 12 V: a regular ignition coil, two 9MT-14 batteries, a starter, a 90 W generator, and a car headlight.
