Constant velocity universal joint

摘要

A constant velocity universal joint comprises an outer joint member 10 formed with three track grooves 12 having roller guide surfaces 14 arranged in circumferentially opposed relation to each other, a tripod member 20 having three radially projecting trunnions 22, rollers 34 inserted in the track grooves 12, and rings 32 fitted on the trunnions 22 to support the rollers 34 for rotation, the rollers 34 being movable along the roller guide surfaces 14 axially of the outer joint member 10, wherein the roller 34 is composed of a set of annular roller portions 34a and 34b and a plurality of balls 36 are interposed between outer raceway surfaces formed in rows each in the inner periphery of the annular roller portion 34 and two rows of inner raceway surfaces formed in the outer periphery of the ring 32.