Fabrication and debugging of key components and parts of lawn mower such that it is necessary to tell apart.
First of all, the docking station. It is based on a section of pipe. On the one hand welded it to the motor sprocket (g=15) of the motorcycle “Minsk”, on the other — the crown of the Cycling stars (g=18).
The latter, located close to similar (and related together cut roller chain), transmits torque to the input shaft of the gearbox. The crown of this sprocket-double welded to machined to a diameter of 37 mm the hub, once belonging to the gear with the slot-howl fit on the considered shaft (in those days, when the gearbox was part of the powertrain of the motor scooter “Vyatka”).
It is impossible here not to mention that when you install the intermediate compounds in place of the first fixed motor sprocket (g=15). And only after that cut the chain connecting two of the ring gear of the Cycling stars-twins. For the manufacture of gear mowers used compact power unit VP-150 from scooter “Vyatka”. In one housing there are three-speed gearbox, the mechanism of its switching and crankshaft.
This unit was completely disassembled: removed the intermediate gear unit, raslaan a damping mechanism is removed and helical crown. The hub of the intermediate block machined to 44 mm diameter, and welded the sprocket from the moped (g=14).
The old crankshaft bearings removed and installed new — 180206 (radial, single-row sealed). The inner diameter of these bearings is the crankshaft machined a new shaft — output. With one side milled a keyway, with the other welded the sprocket from the moped (g=13). Then the unit was assembled, now as gear — with a new output shaft and Bush roller chain connecting the sprockets.
To the “Ant” reducer is attached to its frame, which consists of two steel plates (large and small cheeks) with holes for coupling with the frame of the scooter. On top of both cheeks welded to the attachment housing reducer tube clamp, bottom (only to the big cheek) — other node — cantilever plate.
The left side rail of the mower from the square tube. To the ends it is welded on the plate: one for connection with the pivot node, the other (with two holes) for mounting the cutting unit. On top of the spar is cut a steel square with twelve holes for adjusting the tension of the compensating spring and the finger joints with a thrust of the lifting mechanism; a bottom “Shoe”, which is copied terrain
The right side rail like the left, only in the plate for suspending the cutting unit done another hole and welded in the axis of swing of the rocker arm. The bottom of the axle screwed in lubricating oiler.
A hinge Assembly is mounted in the tubular part of the frame of the scooter. The rubber bushing in it to reduce vibration. Pair of “rubber Bush — axis” smeared with grease.
Used factory crank, harvester combine “Niva”. However, with a small mod — with it removed the drive sprocket. Mounted on the splined end of the output shaft of the reducer crank connecting rod connected to the cutting apparatus.
The connecting rod is made of thin-walled tubes of rectangular cross section. Front of it is welded to the threaded sleeve, which is used to adjust operation of the cutting apparatus; on the other hand the drilled holes for connection to the crank.
The rocker is built like the similar parts of harvester combine “Niva”. For mounting of ball bearings here welded two sleeves with conical holes and the trunnion axis of the swing. As for the ball joints, they are taken from the sidecar of SZA.
With a yoke pivotally connected to the bracket knife cutting machine. It is made by welding segments of steel strips and riveted to the back of the knife.
As already mentioned, the cutter bar of the mower used from a harvester combine “Niva”. The back side of the carrier gon, however, had to be reduced to 20 mm. And the regular bolts finger to replace a similar, but flat-head (mounted mower KS-2,1). This upgrade gave the maximum effect, the holes in the fingers had been the first to razzenkovku and then turn a file into a square to prevent rotation of the bolt heads. The result has been to reduce the height of cut when mowing to 35 mm.
The lifting mechanism. Design it is possible to tell, typical for small-sized agricultural machinery. Based here arm-swivel system with adjusting rods, tension brackets, compensating springs, and stub connections. In our case the system is installed in its place using bolted connections in the middle part of the front fender “Ant”. Return the bracket with the “ears” on the base of the frame of the scooter.
Finally, the main swivel site. It is, in fact, rests on two coaxially (coaxially one inside the other) located pipes. The outer is a base, and the inner — shaft welded to it a lifting and control levers. Lift arms finger joints are connected with the adjusting rods. The latter are eliminated and biases (if they occur) of the cutting apparatus.
head of club “Young technician”, Kelmentsi, Chernivtsi region.