Sliding type constant velocity universal joint

摘要

A slide type constant velocity universal joint is disclosed which comprises, an outer member (110) having a plurality of axially extending track grooves (114) formed in a cylindrical inner circumferential surface thereof, an inner member (120) having a plurality of axially extending track grooves (124) in a spherical outer circumferential surface (122) thereof, balls (130) each incorporated in a ball track formed by a pair of the track groove (114) of said outer member (110) and the track groove (124) of said inner member (120), and a cage (140) having pockets (146) for holding said balls (130). Wherein the centre (Oo) of the outer spherical surface (142) of said cage (140) and the centre (Oi) of the inner spherical surface (144) of the cage are offset from each other by an equal distance axially in the opposite directions from the centre (O) of the pocket. The number of the balls (130) is six and the pitches of the ball tracks are random unequal pitches that are within the range of 60° +/- 3°. The pockets (146) are provided with equal pitch in the circumferential direction and window lengths are equal to each other.