| 摘要 |
Provided is a fixed type constant velocity universal joint (1) of a track groove crossing type, in which track grooves (7) of an outer joint member (2) are each formed into an arc shape having a curvature center at a joint center (O), the track grooves (7) being inclined in a peripheral direction of the outer joint member (2) with respect to a joint axial line (N-N) and being adjacent to each other in the peripheral direction with their inclination directions opposite to each other, and in which track grooves (9) of an inner joint member (3) are formed so as to be mirror-image symmetrical with the paired track grooves (7) of the outer joint member (2) with respect to a joint center plane (P) at an operating angle of 0°. The track grooves (7, 9) of both the joint members (2, 3) each have a length corresponding to a maximum operating angle (¸max) required for a rear-wheel drive shaft. Further, each axial clearance (”Sia1, ”sia2) between the inner joint member (3) and the cage (5) is set larger than an axial clearance (”Tao+”Tai) formed by a ball track clearance (”T) between each of balls (4) and each track groove (7, 9). |
