| 摘要 |
Provided are a structure for a shaft, a male member, and a female member in which the initial stiffness when the male member is twisted is reduced so as to be lower than that in the past, thereby preventing large power from being suddenly transmitted to the shaft and making it possible to reduce a sense of discomfort felt by the driver. The structure (20) for a shaft is provided with: a male member (21) having a plurality of male tooth parts and a plurality of male tooth bottom parts formed on the outer peripheral part (21b); a female member (22) having a plurality of female tooth parts (22b) and a plurality of female tooth bottom parts (22c) formed on the inner peripheral part (22a); and an elastic member (23) provided so as to cover the surface of the outer peripheral part of the male member (21). In an initial state in which the male member (21) is inserted in the female member (22), a first gap (S1) is present between the elastic member (23) and the portion of the side part (22d) of each of the female tooth parts (22b) facing the elastic member (23), and when the male member (21) is caused to rotate, a predetermined time difference is generated in the axial direction until the elastic member (23) and the side part of the female tooth part (22b) come into contact with each other. |
