| 摘要 |
PROBLEM TO BE SOLVED: To provide a fixed type and sliding type constant velocity universal joint capable of reducing wear of a ball rolling face and improving durability. SOLUTION: This constant velocity universal joint is provided with an outward member forming a plurality of track grooves 22 on an inner spherical face 21, an inward member forming a plurality of track grooves 25 on an outer spherical face 24, a plurality of balls 28 provided among the track grooves 22 of the outward member and the track grooves 25 of the inward member, and a cage 29 provided between the inner spherical face 21 of the outward member and the outer spherical face 24 of the inward member to hold the balls 28. At least ball contact sections of the inward member, the outward member, and the cage are made hardened parts obtained by carbonitriding treatment. Hardness of each hardened part is HRC 58 or more. COPYRIGHT: (C)2008,JPO&INPIT
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