| 摘要 |
PURPOSE:To contrive to achieve high efficiency of torque transmission by a method wherein a torque fluctuation is made absorbable with the sliding of friction plate group during the low speed system gear operation under comparatively violent torque fluctuation condition, and the frictional force of the friction plate group is made increasable correspond to the torque increasing with a thrust generating mechanism. CONSTITUTION:The third speed driven gear 123 is integrally provided on a pipe-shaped shaft 11 which is rotatably and externally engaged with an output power shaft 5, the second speed driven gear 122 and the like are engaged to the pipe-shaped shaft 11 via a bearing 292. The forth speed driven gear 124 and the like are made spline fitting to the output power shaft 5, a torsional vibration absorbing device D is interposed between the gear 124 and the pipe-shaped shaft 11. The device D is composed of the first cam plate 161 which is made spline fitting to a cylinder-shaped extended part 14 of the pipe-shaped shaft 11, the second cam plate 162 which is made spline fitting to an outer cylinder 18, each plural driving and driven friction plate 21, 22, primary and secondary springs 241, 242. The secondary spring 242 is operated according to the relative motion caused by the both cam plates 161, 162, thus, a thrust generating device G which increases the frictional force between both friction plates 21, 22 is composed. |
