Patent ID: 8833205
Filing Date: 2014-09-16
Classification: F16H,Y10T

Abstract:
1. A wave generator of a wave gear device in which a cup-shaped or a silk-hat-shaped flexible externally toothed gear is flexed into a predetermined ellipsoidal shape and formed into a state of partially meshing with a rigid internally toothed gear, a position in which both gears mesh is moved in a circumferential direction as the wave generator rotates, and relative rotation corresponding to the difference in the number of teeth on the gears is generated between both gears, wherein a plurality of rollers are provided for contacting an inner peripheral surface of the flexible externally toothed gear and flexing the flexible externally toothed gear into the ellipsoidal shape; the rollers include at least two first rollers arranged on a major axis of the ellipsoidal shape; and when the ellipsoidally flexed flexible externally toothed gear is sectioned along a plane including a gear axis center line and the major axis, a circular outer peripheral surface of the first rollers is inclined relative to the gear center axis line so that an incline thereof is identical to an incline, relative to the gear center axis line, of a region of the inner peripheral surface making contact with the outer peripheral surface of the first rollers on the flexible externally toothed gear.