Patent ID: 6955251
Filing Date: 2005-10-18
Classification: B60N,F16D

Abstract:
1. A clutch unit comprising: an input-side member to which a torque is input; an output-side member from which a torque is output; a control member intervening in a torque transmission path between the input-side member and the output-side member; a stationary-side member constrained from rotation; a first clutch part arranged between the input-side member and the control member; and a second clutch part arranged between the stationary-side member and the output-side member, wherein an input torque from the input-side member is transmitted to the output-side member through the first clutch part and the control member, and a reverse input torque from the output-side member is locked with the stationary-side member through the second clutch part, and wherein the first clutch part comprises locking means for locking the input-side member and the control member with respect to the inpit torque from the input-side member, and returning means for returning the input-side member to a nuetral position at which the input torque is not input when the input-side member is released, and wherein the locking means comprises cam surfaces provided to the input-side member, a circumferential surface provided to the control member, and engaging members interposed between the cam surfaces and the circumferential surface, and the returning means comprises a rotatable retainer for retaining the engaging members and an elastic member for coupling the retainer with a non-rotating member in the direction of rotation.