Electric cultivator. Drawing, description

TOOLS AND MECHANISMS FOR AGRICULTURE
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Electric cultivator. Drawing, description

Tools and mechanisms for agriculture

Directory / Tools and mechanisms for agriculture

No doubt, a motor plow or a microtractor in a household plot is a jack-of-all-trades assistant. But where the plot is small, and trees and shrubs are planted quite densely in the garden, a walk-behind tractor with an internal combustion engine simply cannot turn around. This is where a simple but very effective one comes to the rescue! cultivator based on an electric motor from a washing machine. Its impeller with narrow long teeth leaves behind a perfectly loosened strip of earth with a width of about 120 mm at a digging depth of up to 150 mm.

And the overall layout of the structure ensures the minimum width of the working unit (without handles) - only 175 mm. This makes it easy to maneuver between the ridges, on narrow plots of land along the house, between the bushes - that is, where only hand tools could previously be used.

electric cultivator

The main working body of the cultivator is a steel drum Ø 200 mm, to which narrow saber-shaped teeth are welded around the circumference. The layout of their ends (like the teeth of a circular saw) ensures uniform loosening of the soil along the width of the cultivated strip.

The frame is formed by a U-shaped steel pipe with an outer diameter of 20-25 mm. From below, pieces of steel corners 25x40 mm are welded to it, serving as brackets for the wheel axle and bolts that fasten the bearing plates of the electric motor. From above, to the longitudinal sections of the frame are bolted or welded handles bent from pipes of the same diameter.

The transmission of torque from the engine is carried out using a two-stage belt-chain transmission with a total gear ratio of about 35, which allows the use of a motor with a power of only 0,125 kW. From the output shaft, through a pulley Ø 40 mm, the moment is transmitted to a pulley Ø 300 mm, mounted on the intermediate shaft, from the second shank of which through the sprocket from the moped Z=10 - to the sprocket Z2=41, fixedly fixed on the impeller.

Rice. 1. Electric cultivator (click to enlarge): 1 - handle, 2 - motor carrier plate, 3 - motor pulley, 4 - tensioner, 5 - intermediate shaft pulley, 6 - chain. 7 - teeth of the impeller. 8 - ground discharges, 9 - bracket. 10 - electric motor, 11 - side carrier plate. 12 - impeller, 13 - horizontal cross member of the frame, pipe Ø 25 mm

Rice. 2. Kinematic diagram (click to enlarge): 1 - motor, 2 - pulley, Ø 40 mm, 3 - intermediate shaft pulley, Ø 300 mm, 4 - intermediate shaft bearing assembly, 5 - intermediate shaft sprocket Z1=10, 6 - wheel sprocket, Z2=41, 7-bearing impeller assembly

Rice. 3. Impeller bearing assembly (click to enlarge): 1 - bracket. 2 - cotter pin. 3 - wheel axle, 4 - washer. 5 - thrust bushing. 6 - bearing No. 204, 7 - sprocket hub. 8 - sprocket, 9 - wheel drum

electric cultivator
Rice. 4. Bearing assembly of the intermediate shaft: 1 - pulley, 2 - shaft, 3 - housing, 4 - bearings No. 202, 5 - sprocket bushing, 6 - sprocket, 7 - pin, 8 - motor carrier plate

The electric motor and the housing of the intermediate shaft bearing assembly are mounted on a bearing steel plate 3-4 mm thick. The necessary rigidity is given to it by the second L-shaped plate connected to it in the upper part. In the lower part, both plates are connected to the frame corner with two bolts and can be rotated around a common axis - to adjust the chain tension. The power unit is fixed with a special screw.

To prevent wet clay soil from getting stuck between the teeth, two tubes running tangentially to the wheel drum are welded to the front horizontal cross member of the frame, serving as a cleaner.

Author: Yu.Grigoriev

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