Patent ID: 8011273
Filing Date: 2011-09-06
Classification: F16H,Y10T

Abstract:
1. A wave generator for a wave gear device comprising: a rigid cam plate having an elliptical profile; and a wave bearing mounted on an external peripheral surface of the rigid cam plate, wherein the wave bearing is provided with an inner ring and an outer ring capable of flexing in a radial direction, and a plurality of rolling elements rollably inserted therebetween, and the outer ring and the inner ring are elliptically flexed by the rigid cam plate, the rigid cam plate has a minor axis-side portion, which includes a minor axis-side external peripheral end portion positioned at two ends of a minor axis of the elliptical profile of the rigid cam plate, and the minor axis-side portion is formed from a material having a large coefficient of linear expansion in comparison with a remaining portion of the rigid cam plate.