| 摘要 |
To secure sealing capability of a boot for a constant velocity joint, the boot has a large diameter-side mounting portion mounted on an outer ring of a constant velocity joint, the outer ring has circumferential recess portions on its outer peripheral surface, a tubular portion fitted on the outer peripheral side of the outer ring, circumferential convex portions provided on the inner peripheral surface of the tubular portion in correspondence to the recess portions, and an axial end surface portion opposite to a leading end surface of the outer ring are integrally formed in the large diameter-side mounting portion, end surface seal portions are provided at positions opposite to leading end surfaces of recess portions of the axial end surface portion, and the end surface seal portions are in close contact with the leading end surfaces of the recess portions.
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