Patent ID: 8282495
Filing Date: 2012-10-09
Classification: F16D

Abstract:
1. A fixed type constant velocity universal joint, comprising: an outer member having an inner spherical surface in which multiple track grooves are formed; an inner member having an outer spherical surface in which multiple track grooves are formed; a plurality of balls interposed between the track grooves of the outer member and the track grooves of the inner member so as to transmit torque; and a cage having pockets for accommodating the balls, the cage being interposed between the outer member and the inner member, and the cage having a rigid structure, wherein: the cage comprises four pockets including a pair of long pockets with large circumferential intervals and a pair of short pockets with small circumferential intervals; the cage having the rigid structure has centers of the long pockets positioned 180 degrees from each other along a circumferential direction and centers of the short pockets positioned 180 degrees from each other along the circumferential direction so that the long pockets and the short pockets are arranged alternately to each other along the circumferential direction, and has two of the balls accommodated in each of the long pockets and one of the balls accommodated in each of the short pockets; and an inner end portion of at least one of the track grooves of the inner member has a cutout portion provided thereto.