| 摘要 |
PURPOSE:To raise the level of a transfer torque by providing plural resistance plates in a viscous fluid between the first and the second shafts and providing a cam measure by which resistance plates are forced to be caught and fastened by the differential motion of both shafts. CONSTITUTION:Around the periphery of a sleeve 15 inside a case 19 a sleeve 23 with a flange having a L-letter form in sectional view is so fitted in that it freely rotates and shifts in the shaft direction as a movable unit. Between the outer side face 24 of a flange of the sleeve 23 with the flange and a cam ring 26 engaging with the second shaft 15 is provided a cam measure 25. Consequently, when a differential rotation is generated between the first shaft 13 and the second shaft 15, one rotating torque at that time comes to the cam measure 25 from the case 19 on the first shaft 13 side through a resistance plate 31 and the sleeve 23 and the other comes to the cam measure 25 from the second shaft 15, and then a thrust in the shaft direction is generated by the inclination of a projection with inclination of the cam measure 25. With this thrust, the sleeve 23 shifts in the shaft direction to push the resistance plate 31. |
