Cam-retractable paddy field driving wheel
A drive wheel, telescopic technology, applied in the direction of the wheel with shovel-shaped grip teeth, etc., can solve the problems of increased power consumption, increased dead weight of the drive wheel, and low work efficiency, so as to reduce the total power consumption and increase the driving speed Resistance, work efficiency improvement effect
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[0023] As shown in the figure, the present invention includes a main drive wheel 7 and a drive shaft 8, both of which are connected with a flat key 9. There is a telescopic opening 13 on the main drive wheel 7, and the telescopic blade 5 expands and contracts in the telescopic opening 13 under the action of the elastic force. The generation of the elastic force and the telescopic movement depend on the shape of the conical compression spring 6, the cam 10 and the rotation of the main driving wheel 7. The other links are formed in cooperation with each other. The contact pressure plate 11 forms a whole with the blade connecting shaft 12 and the telescopic blade 5. The conical compression spring 6 is mounted on the blade connecting shaft 12. The small-diameter end of the conical compression spring 6 contacts the inner circle surface of the main driving wheel 7, and the large-diameter end exerts pressure on the contact platen 11 so that it remains in contact with the cam 10 all t...
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