| 摘要 |
PURPOSE:To suppress the relative rotational vibration of a driven gear and an outer clutch member when torque is damped by a buffer spring, by applying a high frictional force to slipping surfaces between the outer clutch member and a side plate secured on the end face of the member. CONSTITUTION:A friction spring 30 for bringing driven gears 3 into pressure contact with an outer clutch member 1 is provided in a compressed state in a flat chamber 29 defined between the driven gear and the inside annular stepped part 6a of a side plate 6 which pinches the driven gears in cooperation with the end face 1a of the outer clutch member. A high frictional force is applied to slipping surfaces between the outer clutch member 1 and the side plate 6 so that the driven gears 3, the outer clutch member 1 and the side plate 6 perform relative rotation toward their original positions because of the repulsive force of a buffer spring 121 when the load upon a main shaft 14 is removed or sharply reduced. However, since the high friction force is applied to the slipping surfaces between the outer clutch member 1 and the side plate 6 by the elasticity of the spring 30, the repulsive force of the spring 121 is damped by the frictional force to suppress the vibration of parts having the slipping surfaces. |
