FIXED UNIFORM-MOTION UNIVERSAL COUPLING

摘要

Provided is a fixed type constant velocity universal joint capable of, without involving decreases in load capacity of an inner joint member (inner member) and in spherical area, increasing rigidity of a cage and stabilizing durability. Pockets (29) of a cage (28) include four pockets including a pair of long pockets (30) with large circumferential intervals and a pair of short pockets (31) with small circumferential intervals. The pair of long pockets (30) can be shifted by 180 degrees along a circumferential direction, and the pair of short pockets (31) can be shifted by 180 degrees along the circumferential direction. The long pockets (30) and the short pockets (31) are arranged alternately to each other along the circumferential direction. Two balls (27) are accommodated in each of the long pockets (30), while one ball is accommodated in each of the short pockets (31). A cutout portion (45) is provided to an inner end portion of at least one of the track grooves (25) of the inner member.