Patent ID: 6220414
Filing Date: 2001-04-24
Classification: F16D

Abstract:
A one-way clutch comprising:an inner ring;an outer ring relatively rotatably assembled with the inner ring;a plurality of sprags that are each disposed between the inner and outer rings for rocking motion in a plane orthogonal to an axis of rotation of the inner and outer rings, tilt in a direction to wedge between the inner and outer rings to transmit torque therebetween, and tilt in a direction to slidingly contact the inner and outer rings to cut off transmission of torque therebetween;a ring-like cage that is disposed coaxially between the inner and outer rings and has a plurality of riding lands, arranged in a direction orthogonal to the plane where the respective sprags rock, on which the respective sprags during rocking motion are slidably guided; anda plurality of pressing members for normally pressing the respective sprags so that the sprags tilt in the direction to wedge between the inner and outer rings while shifting contact points at which the sprags contact the riding lands of the cage in the plane where the sprags rock,wherein a tangential tilting force acting on the contact point of each of the sprags with the riding land to tilt the sprag in the direction to wedge the sprag between the inner and outer rings is set larger than a frictional force between the sprag and the riding land acting on the contact point.