| 摘要 |
PROBLEM TO BE SOLVED: To improve performance without complicating assembly. SOLUTION: A hub 6a is formed by combining a first and second inner member 4a, 5a with each other. A second small diameter part 11a initially fits with a second fitting surface part 19a with keeping interference prior to fitting of a female spline groove 9a with a male spline groove 17a formed in a first small diameter part 10a and a first fitting surface part 18a, respectively, at the time of combining work. Flexural rigidity can be enhanced by lengthening a length in an axial direction of a fitting part of the second small diameter part 11a with the second fitting surface part 19a. An engaging groove 32 formed in a second inner ring member and an engaging projection part provided in a push-in jig are engaged prior to the engagement of the second small diameter part 11a with the second fitting surface part 19a at the time of combining work. The second inner ring member 5a is then pushed into the first inner ring member 4a in a state of phases of both spline grooves 9a, 17a corresponding with each other, and the hub 6a is assembled. |
