| 摘要 |
A power roller (18c) comprises a power roller inner wheel (93) in frictional contact with a input/output disks (18a,18b), a power roller outer wheel (94) provided in a trunnion (17a), a ball bearing (92) interposed between the power roller inner wheel (93) and the power roller outer wheel (94), and an inner wheel supporting shaft (95) which supports the power roller inner wheel (93) such that it is free to rotate, the shaft having a shaft base part (95b) supported in the trunnion (17a), and arranged so that the radial support rigidity is set high in a gyration axis direction and set low in the direction perpendicular to the trunnion gyration axis (19a) and the power roller rotation axis (15d). When one of the disks is pressed and displaced in the direction of the other disk by the press member, the power roller inner wheel (93) displaces with the ball bearing (92) by the displacement of the one of the disks Therefore, as the radial support rigidity of the inner wheel supporting shaft (95) is different depending on the support direction, a slide function of the power roller (18c) can be provided by a simple structure having a small number of component parts which does not have a slide mechanism. <IMAGE> |
