| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a stepped automatic transmission device for 4-speed or more having a novel structure with a simple construction. <P>SOLUTION: The transmission device 31 has an input shaft 52, a first rotating shaft 53, a second rotating shaft 54, and a third rotating shaft 64 that are arranged in the front-rear direction. The input shaft 52 is provided with an upstream clutch group 81 having a first clutch 55 and a second clutch 59. The first and second clutches 55, 59 are provided with a first shift gear pair 86 and a second shift gear pair 83, respectively. The second rotating shaft 54 is provided with a downstream clutch group 82 having a third clutch 70 and a fourth clutch 66. The third clutch 70 and the fourth clutch 66 are provided with a third shift gear pair 91 and a fourth shift gear pair 90. The upstream and downstream clutch groups 81, 82 are arranged at positions at which the groups at least partly overlap each other in the axial direction of the input shaft 52. <P>COPYRIGHT: (C)2009,JPO&INPIT |
