According to the above technology are made, as already mentioned, the two side of the gearbox. On the output shaft each placed in the hub and attached by bolt-on transitional disk (improvised|. Assemble the gears with their wheels.
Rear axle, the MT — home-made, welded. But in order to make, you need to know the exact distance that should be between the plates. And this requires a (albeit minimal volume) mathematical calculation.
Measuring the distance from the wheel center to the outer edges of the plate, double it; the result is subtracted NZ previously selected (at the stage of thinking about “technical conditions”) track width tractors.
In particular, the MT, shown in the illustration, the distance from the wheel center to the edge of the plate is equal to 132,5 mm. After doubling received 265 mm. And the track width of the tractor 765. Then: 765 mm — 265 Mm = 500 mm. It is this length must be elements of the rear axle connecting the two plates with each other. And as the material is best suitable area of appropriate sizes. For example, the rear elements, which would bear essentially the entire load will approach the area 70S 70 mm, while for the front you can restrict the area 35 X35 mm.
Well and how to weld them to the plates without breaking the alignment of the gears!
Wheel at this stage it is advisable to disconnect. But the primary shafts of the gearboxes are temporarily bonded to each other using the segment of support pipe. And its internal diameter must be such that the primary shaft gear units would be in it tight enough. Inserting in its place the connecting elements of the area length (for this version of MT) 500 mm, welded to the ends of the latter to the plates, after which the auxiliary tube is cut and removed.
Frame min and t R a C t o R a (see Fig.) also welded. It can be made out of pipe segments, channel or area of appropriate size, and the required reserves of strength. In the present embodiment, the side members of the frame of MT — segments of a seamless steel pipe GOST 8734-75 external diameter 60 mm n a wall thickness of 5 mm. the Length is determined based on the planned dimensions of the mini-tractor, with the driver’s seat and size of the power unit, n is 1190 mm. the side members are welded to the front upper end plate of the gearbox. The connection is enhanced by the gusset in a horizontal n vertical planes, keeping parallel to the main power elements. With regard to the shape of the power unit and other major nodes of MT welded frame-arc power unit. In the present embodiment, material for its production was also
seamless steel pipe, but with an outer diameter of 27 mm n wall thickness of 3.5 mm.
Attaching rear wheels to the gears, install the front side frame MT on stands (temporary) so that the spar is parallel to the surface of the earth. Then determine the height of the bushings of the slewing mechanism of the front, steered wheels. Welded to the side members of the channel 100X X 60 mm (seam solid, bottom) and the crossmember (area 30X30 mm, top). In the sides (strictly in the middle! channel, enhanced fatty pads, that a hole is drilled under the swing axis with a diameter of 30 mm.
Front axle (see picture). homemade. Details of the slewing mechanism are machined after you have determined the height of the bushings. Then build the left and right nodes of the slewing mechanism to the front wheels. From the pipe a suitable cross section cut out two segments of appropriate length (calculated based on track width and other parameters associated with the nodes of the slewing gear Assembly with wheel). Being welded to the right (left) sleeve of the slewing nodes — on the one hand, and on the other to the hub node of the swing of the front axle, they will serve as the beams swing.
Assembled the front axle down under the frame of MT. When combining holes (in the hub site swing and the sidewalls of channel frame) is inserted into the axis of the swing — bolt MLO, tighten the nut n raskryvayut. Chassis ready.
The location of units and parts on the chassis, it is possible to tell, typical. The rear axle housing is the gearbox main gear. A flexible coupling connecting the shaft of the main peredachi with the primary shafts final drives from the sidecar of SZA. If you get such fails they can be replaced with homemade. As an elastic connecting element well will serve the disks with a minimum thickness of 20 mm with four holes each. Disks are inserted between the coupling halves and attach to them boltan. Here, on the rear axle, set the seat, made of a conventional chair with metal legs.
However, the legs had to be shortened in order to comply with the requirements of ergonomics and technical aesthetics and modern design.
Front panel with Polikom — old scooter “Tula 200”. Equally unusual use of the MT is found for the back of the hood of a battered motor scooter “Vyatka — Electron”. From her and another structural node: Polycom cut crosswise on the frame of the power unit and mounted on the frame of the mini-tractor.
Frame welded together. Moreover, the rear portion of the power unit through the area attached to the frame of the mini-tractor.
Wheel axle with the brake drum removed. Outside strictly according to the center for her welded steel round bars — future new shaft is of such length that sprocket on the gearbox main gear would be placed on one line, and at the end of the shaft that would make the rolling bearing. The shaft blank is inserted into the lathe for finishing to the required diameter.
As for the parameters of most of the chain transmission, it all depends on your existing particular saadeldin possibilities. If the main transmission is used the sprocket from the motor scooter “Vyatka — Electron”, shaft (new!) excellent work the sprocket from a motorcycle “Minsk”. Well, if the main transmission to apply Izhevsk, the asterisk “lengthened” the shaft will have to do yourself. The number of teeth is selected according to the desired gear ratio.
“Lengthened” the shaft is mounted on the seat Assembly with the brake drum pressed the sprocket and bearing.
Rulemaklng from the GAZ — 51, cropped. She is a steering shaft is inserted in the hole of the front panel so that the reducer pad was placed between the body of the target power unit and the frame. And the site columns to the cross beam (channel 100X60 mm) welded, while the steering shaft to the frame of the power unit is mounted that neither is an ordinary clamp.
From the site column to the corner of the mounting panel is mounted another area, which supports the end bearing of the shaft of the power unit. The angle is welded, in this, holes are drilled for fastening the bearing housing (see figure).
Other structural features of the MT should be noted that the rods used here the shift rod from the car BelAZ. The wings of the rear wheels is cut from the body of the old “cargo” of the car and attached to struts (area 25 X X25 mm). For the PTO shaft on the lower branch of the circuit provides for the installation of angle gearbox (outboard motor or from any farm). But it can not be put: it all depends on performed using the mini-tractor work.
Truck (trailer) with carrying capacity 0,5 t — homemade (see figure). Its frame is made of tubes, racks of wheels and the outer wheels from the truck for transportation of the boat “Progress”. You can, of course, to simplify the design, and taking the entire wheel and strut Assembly — boat “Progress”. The body of the trailer made of wood. Side and rear sides open.
The hitch mechanism of aggregates even in
respects similar to those used on standard commercially available tractors, but instead of the power cylinder is driven by a conventional lever having the latch. On top of that made the mechanism detachable. Assembled on a metal baseplate (STZ 5 mm thick) with a hole for passage of the PTO shaft”
Welded to the plate 2 area. In the upper part to the corners of the welded sleeve for the shaft (axis) of the lifting levers. At the bottom of the drilled holes for the axes of the longitudinal rods.
Traction is made from a strip of steel St3 (thickness 5 mm, width 50 mm). As balls for ball joints used similar items from ball bearings of the appropriate size. To drill holes in them, the balls are let go in the charcoal (lay in a burning oven and leave there until cool). Technological repeating this operation twice, start drilling, not giving the ball to heat up.
Drill the diameter of the balls, but not completely, leaving on the exit hole of smaller diameter. Of course, this work is not to hurry, but the hinges but work with such balls excellent.
The entire hitch mechanism of the tractor is mounted with four bolts.
Plow many homebrew, is based on the Coulter. At the same old stand at the top of the bend cut off and cut and welded “area of attachment”. Case increase, privaris to the blade top and the rear end of the steel strip (preferably steel jointers Л65) width of 50-70 mm and a thickness of 5 mm. Suture treated flush. And in the bottom of the rack is welded triangle and the emphasis for field Board.
The entire circuit adjustment and control the plow from the tractor. Plough frame from the metal strip (St3) with a thickness of 10 mm and a width of 60 mm.
Hilling potatoes, the author recommends to perform a regular horse trailer Hiller. It is not difficult to do, of course, and mounted the Hiller, but the use of such planting potatoes should be performed with strict observance of the distances between the rows. Even the rows to be perfectly smooth, though almost everywhere we have the tubers are dug into the soil immediately behind the plow, when the above requirement is not practicable.
To increase the adhesion of the rear wheels with the ground provided by the use of special cleats, and hanging additional weight to the frame of the mini-tractor.
The author constructs deliberately moved away from specifying the sizes of various components and parts. Most importantly, in his opinion, the idea at the basis of any other technical solution. By understanding this idea, a true homebrew will find a way of its realization, focusing on their own “material database”, on their specific capabilities. And for beginners, it might be useful and more detailed elaboration of the design in sketches and drawings.
V. BOLDYSHEV, Vologda region