| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the fatigue strength of a male spline portion by easing stress concentration of shear stress and tensile stress, and to facilitate assembly work of boots. <P>SOLUTION: The male spline portion Sm is formed in a periphery of the power transmission shaft. An enlarged diameter portion 21b gradually enlarging in the outer diameter toward the opposite shaft end side is arranged in a portion of the opposite shaft end side within a valley portion 21 of the male spline portion Sm. A rounded portion 21b1 having a circular cross section is arranged in the circumference directions of the enlarged diameter portion 21b, and a curvature radius of this R portion 21b1 is gradually enlarged toward the opposite shaft end side. A greater diameter A of the male spline portion Sm is made to be smaller than an outer diameter B of a shoulder 28 on both sides of a boots attachment groove 27. <P>COPYRIGHT: (C)2008,JPO&INPIT |
