Patent ID: 7128654
Filing Date: 2006-10-31
Classification: F16D,Y10S

Abstract:
1. A constant velocity joint provided with an inner joint member whose outer surface takes a spherical surface and has plural first guide tracks extending in the axial direction thereof; an outer joint member of a cup shape whose internal surface takes a spherical surface and has second guide tracks of the same number as the first guide tracks, extending in the axial direction thereof; a cage fit between the inner and outer joint members; and balls retained respectively in ball retaining windows of the cage and engaged with the first and second guide tracks, characterized in that at least one of each first guide track and each second guide track is made to be smaller in contact angle with the ball at a bottom portion side than at an opening portion side of the outer joint member and is made to be larger in curvature radius for the one guide track at the bottom portion side than at the opening portion side.