To secure the sufficient fatigue strength of a spline while inhibiting the rattling in the circumferential direction of power transmitting members, in a spline fitting structure of the power transmitting members wherein the direction of load torque is variable.
An angle of torsion of which the direction is changed at an intermediate part of a fitting part is applied to a shaft spline 6 of a power transmitting shaft 1, and a maximum value of fitting pressure p1 is reduced by providing a distribution of the fitting pressure p1 acting on the shaft spline 6 from a hole spline 7 of the fitting part, with a maximum value, whereby the stress of each spline 6, 7 corresponding to a base side is released regardless of the direction of the load torque T and the lowering of the fatigue strength can be prevented while inhibiting the rattling in the circumferential direction of a constant velocity universal joint with an inner ring 3.
NAKAGAWA AKIRA
Higashio Masahiro
Torii Kazuhisa