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US 2006/0217205 A1Published application
Tripod constant velocity universal joint
AssigneeNtn Corporation
InventorsJunichi Izumino, Minoru Ishijima
Life of this patent
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Abstract
A tripod constant velocity universal joint comprises among others an inner joint member having a boss 22 and journals 24 radially protruding from the boss, a radius of curvature R1 as viewed in a cross section of a journal bottom part 23 connecting the boss 22 to the journal 24 and as measured at locations opposing circumferentially of the joint is larger than a radius of curvature R2 of the journal bottom part as viewed in its cross section and as measured at locations opposing axially of the joint and R1 gradually decreases down to R2.
Claims8
A tripod constant velocity universal joint comprising:
- an outer joint member having three, cicumferentially equispaced, axially extending track grooves formed in an inner circumference thereof, the outer joint member being connected to a first rotary shaft for transmission of torque;
- an inner joint member having a boss connected to a second rotary shaft for transmission of torque and three circumferentially equispaced journals each radially protruding from the boss;
- and
- a roller cassette interposed between the outer joint member and the inner joint member for transmission of torque,
- wherein a radius of curvature (R1) of a journal bottom part connecting the boss to the journal as viewed in a plane perpendicular to an axis of the joint is larger than a radius of curvature (R2) of the journal bottom part as viewed in a plane including the axis of the joint and an axis of the journal and the radius of curvature of the journal bottom part gradually decreases from R1 down to R2.
2 more elements
Dependencies are inferred from the claim text.