FIXED TYPE CONSTANT VELOCITY UNIVERSAL JOINT

摘要

PROBLEM TO BE SOLVED: To alleviate concentration of both tensile stress and shearing stress applied to a male spline part and improve fatigue strength of an outside joint member.

SOLUTION: The male spline part Sm is formed on the outer periphery of a stem part of the outside joint member. An enlarged diameter part 21b of which outer diameter dimension is gradually enlarged toward a side opposite to a shaft end is provided in a portion in the side opposite to the shaft end out of a valley part 21 of the male spline part Sm. Round parts 21b1 having an arcuate cross section are provided in both sides in the circumferential direction of the enlarged diameter part 21b, and the curvature radius of the round part 21b1 is gradually increased toward the side opposite to the shaft end.

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