| 摘要 |
PROBLEM TO BE SOLVED: To improve lubricity of grease in a contact part of each component to enhance durability in the contact part. SOLUTION: The constant velocity universal joint is provided with an outer side joint member 10 which forms three track grooves 12 in an axial direction of an inner periphery and has roller guide surfaces 14 in an axial direction on both sides of each track channel 12 respectively, a tripod member 20 which contains three leg shafts 22 protruding in a radial direction and has a lateral cross section of the leg shaft 22 with a substantially elliptical shape in which a major axis is disposed orthogonal to an axial line of a joint, and roller mechanisms 37 which is respectively mounted on each leg shaft 22 of the tripod member 20 so as to be freely oscillatable with respect to the leg shaft 22. The roller mechanism 37 is an assembly body composed of a roller 34 which is guided in parallel with an axial line of the outer side joint member 10 along the roller guide surface 14 and of a ring 32 which is externally fitted to an outer peripheral surface of the leg shaft 22 and which freely rotatably supports the roller 34 through the medium of a plurality of rolling bodies 36. Oil grooves for holding grease are provided in the inner peripheral surface of the ring 32. COPYRIGHT: (C)2007,JPO&INPIT
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