| 摘要 |
The grain spreading device of this invention comprises an inverted conically-shaped hopper having an open upper end and a smaller open lower end. A variable speed motor is mounted within the hopper, and has an output power shaft which extends downwardly through the open lower end thereof. An elongated sleeve embraces the lower end of the power shaft, and the sleeve is operatively connected to the power shaft by a series of vertically disposed cam members which embrace the shaft within the sleeve. A resilient spring is mounted within the lower end of the sleeve around the lower end of the shaft and supports the lower cam member to which the sleeve is attached. The upper cam member is rigidly secured to the shaft and rotational power is imparted to the sleeve from the shaft through the cam members. The vertical position of the sleeve with respect to the shaft is dictated by the spring. A horizontally disposed screen spreader plate is mounted to the top of the sleeve and is normally held adjacent the open lower end of the hopper when the hopper is free of grain. Wing plates are pivotally secured to the grain spreader plate, and grain deflector flanges are secured to the side edges thereof to impart thrust to the grain deposited thereon. Weights are adjustably secured to the wing plates to influence their attitude while being rotated.
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