WHEEL DRIVE LINE FOR AUTOMOBILE

摘要

PROBLEM TO BE SOLVED: To provide structure capable of reducing a size and weight, and to secure sufficient durability. SOLUTION: Separation between a hub 4a constituting a bearing unit 1b for supporting a wheel and a drive shaft member 18b constituting a constant velocity universal joint 2a is prevented by a snap ring 33a. A diameter D43 of a constricted part 43 provided in an inner end part of a spline shaft 17a constituting the member 18b is made larger than a groove bottom diameter D27 of a male spline part 27 of a drive shaft 26 with its outer end part coupled to an inner ring 16 for the constant velocity universal joint. By this constitution, strength of the spline shaft 17a is enhanced to solve a problem in the purpose.