| 摘要 |
PURPOSE:To secure the necessary up and down movement stroke of the operation member by holding both sides of a gear case with a link body in the lateral direction, and providing an input gear shaft and an output gear shaft at both sides of the gear case respectively. CONSTITUTION:A gear case 6 is provided at a power transmission shaft which links a power pickup shaft and an input shaft 2a, both sides of the gear case 6 are held with lower link 12, and an input gear shaft 7, an output gear shaft 9, and an intermediate gear shaft are arranged at both sides of the gear case 6. As a result, even though the power transmission shaft is made heavier by providing the gear case 6, an exclusive holding member is not necessary to provide, and the gear case 6 functions as an optimum strength reinforcing member of the lower link 12. Furthermore, since an unfavorable interference of the gear case 6 to the farming position or to the operation member 2 can be avoided, the up and down movement stroke necessary for the operation member 2 can be secured.
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