| 摘要 |
PURPOSE:To facilitate the assembly of a lower gear case by fitting the front axle and a planetary gears unit at the cover side. CONSTITUTION:A lower gear case 4 that can freely be rotated around the central axle 9 in the rotating direction is provided with a planetary gears mechanism 16 and a cover 15 inside and supports a front axle 14. This cover 15 mounts the front axle 14 by bearings 25 and 26 and a ring gear 27 by a bolt 28. As a result, after the planetary gears mechanism is fit in the cover 14, the lower gear case can be assembled and assembly can be facilitated. |
