| 摘要 |
PROBLEM TO BE SOLVED: To solve such a problem in assembling or the like that the difference in level between a ball spline and a male screw interferes with a roller bearing within an output disk in inserting and assembling a rotating shaft. SOLUTION: Two output disks 18, 20 and an output gear 22, etc., are assembled into a gear housing 23, which is assembled into a transmission case 1. In this state, at the time of inserting a rotating shaft 3 into the inner hole of the output disks 18, 20, the small diameter part of a male screw part 3a forming the difference in level against the large diameter part of a ball spline 21 of the rotating shaft 3 is covered with a member to be engaged 41 where a tapered part 43 tapered from the end part of a large diameter 42 equivalent to the diameter of the ball spline 21 is formed. By screwing and fixing a female screw part 45 formed in the inner hollow 44 of the member to be engaged 41 to the male screw part 3a, the corner part of the ball spline 21 becomes gently tapered so that the difference in level between the ball spline 21 and the male screw part 3a hardly interferes. In addition, the end face of the ball spline 21 and the male screw part 3a are covered so as to be protected. |
