| 摘要 |
PURPOSE: To provide an overrunning clutch for correctly and easily performing absorption of shock torque, namely, setting of the maximum transmitting torque. CONSTITUTION: The outer cylindrical part 3a and the inner cylindrical part 5a of a one-way clutch are fixed independently from each other on the internal gear and the center case of a planetary gear transmission mechanism respectively, a wedge groove 3 for housing a rolling body 3b in either one of the inner circumferential surface of the outer cylindrical part 3a and the outer circumferential surface of the inner cylindrical part 5a, and a locking recessed part 5e for locking the rolling body 3b in the other one of the inner circumferential surface of the outer cylindrical part 3a and the outer circumferential surface of the inner cylindrical part 5a. By such a way, a torque value given when the rolling body 3b is released from its diameter small recessed part 5e can be surely set by only setting the depth of the locking recessed part 5e. And also since both forces in radial direction locking in respective opposite directions on both cylindrical part 3a and 5a while sandwiching the rolling body 3b are reduced, strengths of both cylindrical parts 3a, 5a can be reduced, and reduction of both weights of cylindrical parts 3a, 5a can be realized. Since torque is not transmitted by frictional force, reduction of abrasion can be realized. |
