Patent ID: 6843728

Claim:
A tripod type constant-velocity universal joint comprising: an outer ring formed with three axially extending track grooves in an inner periphery thereof; a tripod member mounted in said outer ring and having three trunnions formed thereon so as to oppose said track grooves, raceway grooves being formed in side faces of each of said track grooves and opposing each other in the circumferential direction of said outer ring, said raceway grooves extending in the axial direction of said outer ring; guide blocks respectively supported on said trunnions so as to be pivotable relative to said trunnions and respectively received in said track grooves, each of said guide blocks being formed with raceway grooves in side faces thereof so as to face said raceway grooves of said outer ring to thereby form a plurality of raceway groove pairs; a plurality of rolling elements mounted in said plurality of raceway groove pairs; retainers for retaining said rolling elements; and moving distance restricting mechanisms for restricting the moving distances of said retainers to half of the moving distances of said guide blocks, respectively; wherein said rolling members are arranged to roll over the entire moving range in the axial direction of said outer ring, wherein said retainers respectively have plate portions disposed between the inner surfaces of said track grooves and the outer surfaces of said guide blocks, and wherein each of said moving distance restricting mechanisms comprises a pivotable lever having its longitudinally central portion supported by said plate portion of said retainer, said pivotable lever being formed with a pair of guide grooves extending axially, and a pair of pins inserted in said guide grooves, one of said pair of pins being secured to said outer ring and the other being secured to a respective one of said guide blocks.