| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve such problem that torsion of a shaft caused by functioning an unequal speed conversion means in a rice transplanter having a rotary planting device. <P>SOLUTION: The planting device 8 includes: a rotary case 36; and a pair of scraping units 37 mounted on the rotary case. A sun gear 92, an intermediate gear 93, and a planetary gear 94 are incorporated in the rotary case 36. The sun gear 94 is fixed to a planting center shaft 91. Power is transmitted from a planting transmission shaft 87 to a planting center shaft 91 through third bevel gears 98, 99. Half or more of the required acceleration or deceleration speed is given to a power transmission passage by an unequal speed gear incorporated in a spacing changing device in sparse planting. Half or less of the acceleration or deceleration speed in sparse planting is always given in the third bevel gears 98, 99. Acceleration or deceleration is performed at multiple locations, thus, oscillation is suppressed, and torsion deformation of the shaft is suppressed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
