| 摘要 |
PROBLEM TO BE SOLVED: To enlarge the length dimension of a column part and improve strength and durability of a cage by regulating the dimensions of the cage and each pocket to a state as expressed by a specific equation, when the central axis of an inner ring and the central axis of the outer ring of a constant velocity joint after completion are displaced to the maximum in a used state. SOLUTION: When difference in circular arc lengths, or the lengths in the circumferential direction of pockets 10a, 10b in the outer circumferential side of a cage 9b is set toΔL, the dimensions of the cage 9b and the respective pockets 10a, 10b are so regulated as to satisfy an equation (γ0-γ1).Dc/2 <ΔL<(γ0-γ1).Dc. In the equation,γ0 andγ1 are set to the maximum values out of the angles or balls, which are already incorporates in other pockets 10a, 10b or incorporated in the respective pockets 10a, 10b respectively, displaced in the circumferential direction, and the external shape of the case 9b is set to Dc. The length of the column 30 extending circumferentially between the respective pockets 10a, 10b can be enlarged by satisfying this condition. This constitution can improve the durability of the cage 9b.
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