Patent ID: 7698968

Claim:
A method for reducing an input-side holding torque required for holding a rotation input member of a wave gear device, comprising the steps of: providing the wave gear device having a rigid internal gear, a flexible external gear and a wave generator as the rotation input member; mounting a movable component of the wave generator on an input-side rotating shaft of a motor, the movable component being movable in an axial direction of the input-side rotating shaft; disposing a fixed member at a position adjacent to the movable component in a direction in which a thrust force produced by a loading torque applied to the flexible external gear is applied, the fixed member being fixed in a rotational direction about an axis of the input-side rotating shaft and in the axial direction of the input-side rotating shaft; using the thrust force to press the movable component of the wave generator against the fixed member during operation of the wave gear device; and using a friction force generated between the movable component and the fixed member as part of the input-side holding torque.