Patent ID: 8182352
Filing Date: 2012-05-22
Classification: F16D,Y10S

Abstract:
1. A constant velocity universal joint, comprising: an outer joint member having an inner spherical surface in which a plurality of track grooves are formed; an inner joint member having an outer spherical surface in which a plurality of track grooves paired with the track grooves of the outer joint member are formed; a plurality of balls interposed between the track grooves of the outer joint member and the track grooves of the inner joint member so as to transmit torque; and a cage interposed between the inner spherical surface of the outer joint member and the outer spherical surface of the inner joint member so as to retain the balls, wherein a curvature radius of an inner diameter surface of the cage and a curvature radius of the outer spherical surface of the inner joint member are substantially equal to each other, and wherein a tapered relief portion retracted with respect to the outer spherical surface is formed with low curvature with a range of 0.5 mm or more and 3 mm or less from a back end surface of the outer spherical surface of the inner joint member so as to be smoothly continuous with the outer spherical surface.