| 摘要 |
Provided is a fixed type constant velocity universal joint which is capable of achieving the following even at the time of an unexpected high-angle operation, in particular, even when an angle expected during use of a constant velocity universal joint is exceeded: reduction of stress generated when balls and edge portions interfere with each other, suppression of chipping of the edge portions, and prolongation of a service life of the joint as a whole. The fixed type constant velocity universal joint includes: an outer joint member having an inner surface (21) in which a plurality of track grooves (22) are formed; an inner joint member having an outer surface (24) in which a plurality of track grooves (25) are formed; a plurality of balls (27) interposed between the track grooves (22) of the outer joint member and the track grooves (25) of the inner joint member, for transmitting torque; and a retainer (28) for retaining the balls (27), in which a cutout round portion (32) is provided at least at a ball-contact-point corresponding part on a track inlet end (22a) of each of the track grooves (22) of the outer joint member. |
