| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve the responsiveness of a driving force transmitting device by rolling a ball by the operation of a cam mechanism caused by the increase and decrease of the frictional engagement force when a pilot clutch mechanism is frictionally engaged, and acting the frictional force caused by the rolling of the ball in the moving direction of a clutch plate forming the pilot clutch mechanism. SOLUTION: A cam mechanism 10e is formed by a first cam member 19 connected to an inner shaft 10b integrally rotatably and axially movably, a ball 18 integrally rotatably held by an inner clutch plate 14a of a pilot clutch mechanism 10d, and a second cam member 17 holding the ball 18 with the frist cam member 19, and the ball 18 is rotatably fitted in a retainer 16 axially movably mounted on the inner clutch plate 14a.</p> |
