| 摘要 |
PROBLEM TO BE SOLVED: To provide a boot for a constant velocity universal joint having improved fatigue strength particularly at its boundary between a small diameter part and a bellows part. SOLUTION: In the boot for the constant velocity universal joint, a connection part 35 provided at the end of the bellows part 30 on the side of the small diameter part 10 has a circular-arc outer face 35a whose curvature radius Ra is larger than a curvature radius R1 of the outer face of a mountain portion 31a of the bellows part 30. The connection part 35 is not thinner at any point than at the end of the connection part 35 on the side of a large diameter part 20. COPYRIGHT: (C)2009,JPO&INPIT
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