| 摘要 |
PROBLEM TO BE SOLVED: To perform automatic control of the opening of a grain screening fin of a thresher with a simple structure. SOLUTION: A hydraulic stepless transmission (HST) is operated by the driving motion of a motor 35 through a speed reducer 39, a gear 37, a fan gear and a trunnion shaft 79. A link 86 is shifted in lateral direction by swinging a lever 83 around a shaft 83a to change the angles of a plurality of fins 85 and change the opening between adjacent fins 85, 85. The fan gear 38 is connected to the lever 83 through a wire 80 as an interlocking means. When the fan gear 38 is turned in the direction of the arrow K1 to increase the HST output and the amount of treated grains, the opening of the fin 85 is increased interlocked with the increase of the HST output to increase the amount of screened grain. COPYRIGHT: (C)2007,JPO&INPIT
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