| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable the main speed change mechanism to be compactly configured by shortening the arrangement of the driven gears of a main speed change mechanism on a countershaft in the axial direction. <P>SOLUTION: Driven gears 39b-42b of a main speed change mechanism 9 on a countershaft 38 are arranged sequentially from a high-speed side at the front to a low-speed side in the rear; an auxiliary low-speed drive gear 46 for an auxiliary speed change mechanism 10 is provided at the front side of the highest-speed driven gear 42b on the countershaft 38; and the next-highest-speed driven gear 41b is set as the auxiliary high-speed drive gear for the auxiliary speed change mechanism 10. An auxiliary low-speed driven gear 48 and an auxiliary high-speed driven gear 49 for the auxiliary speed change mechanism 10 are arranged on an output shaft 47 and engage with the auxiliary low-speed drive gear 46 and the next-highest-speed driven gear 41b, respectively, and are made to overlap the highest-speed driven gear 42b, the auxiliary low-speed drive gear 46, and the next-highest-speed driven gear 41b in the front-rear direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
