ROTARY HOE

We return to a universal small-sized agricultural machine WSM-2 “Cinderella”, designed and built by members of the primary organization of VOIR Seversk secondary school № 44, Krasnodar region (“M-K” №9 1980, №6, 1981). Designed for use on the school experimental plot, student production brigades, in the household plots, collective and state greenhouses, USM-2 can already carry more than a dozen kinds of operations. Nevertheless, Seversky, students continue to improve “Cinderella” — come up with new and new agricultural tools that extend its capabilities. Today we will talk about two such soil-cultivating aggregates: cultivator and mower.

The unit is designed for loosening soil to a depth of 100-120 mm in width, 540 mm in a single pass. It is attached to the rear of the frame, USM-2 with four bolts and is driven by a chain from a sprocket located on the left side of microstructure on the shaft of the worm gear (Fig. 1).

The desire to improve the performance and reliability of the cutting apparatus brought man from simple braids to all sorts of mowers. Today there are many mechanisms by which to quickly and efficiently mow the grass, grains, krupnozubchatye plants. It would seem, what else can you come up with! And yet people continue to find new solutions. For example, the design suggested by a member Vorovskogo mug Sasha Nikolaev.

Developed small rotary hinged mower is designed for mowing and shredding grass. Working on it — the shaft with twenty-four knives-choppers, which are freely suspended between the welded to the shaft cheeks. Knives made from spring steel and have sharp cutting edges.

 

 

Rotary lawn mower:

 

1 — shaft, 2 — bearing housing, 3 — cheek, 4 — knives 5 — sprocket driven, 6 — circuit, 7 — sprocket, 8 — frame mower, 9 cover, 10 — bracket of the casing 11 intermediate shaft 12 and angular gear, 13 — PTO, 14 — housing support bearing 15 — V-belt drive, 16 — PAL worm gearbox, 17 — tool kit “Cinderella”.

 

The axis of the knives from bar Ø 9 mm press-fitted into coaxial holes of each pair of cheeks. In working condition knives are hanging on the axes down spikes; when the shaft rotates, the centrifugal force “throws” them and forces them to take a stable radial position. Any field of plants, trapped in this moment under racing in a circle of the tip will be inevitably skewed.

 

Such a rapid rotational movement of the working body gets from the PTO of “Cinderella”, to which the mower is mounted on the front four bolts. Torque via angular gear box located to the left on the frame of the mower is transmitted to the intermediate shaft with a leading asterisk. From it a chain driven sprocket and hence to work on.

 

If a knife hits a stone or other extraneous solid object, then spoiled the knife easy to remove, knocking the axle out of the holes through the core.

 

N. OBREJA, head of a school organization VOIR