| 摘要 |
A one-way clutch comprises an inner race (2), an outer race (3) driven in a specific direction and provided with a plurality of pockets (4) in its inner circumference facing the outer circumference of the inner race (2) and threaded attachment holes (3a) to be used for attaching a driven member to the outer race (3), rollers (5) respectively placed in the plurality of pockets (4), and elastic members (6) pressing the rollers (5) in a specific direction. An center angular interval between the middle pocket (4) in any three successive pockets (4) among the plurality of pockets (4) and the adjacent pocket (4) on the forward side of the middle pocket (4), and an center angular interval between the middle pocket (4) and the adjacent pocket (4) on the backward side of the middle pocket are different from each other. Thus the distance (d) between the front end surface (4b) of the pocket (4) and the threaded attachment hole (3a) on the forward side of the pocket (4) is sufficient, and the reduction of the rigidity of the outer race (3) can be prevented without increasing the diameter of the outer race (3). The springs (6) may be flat coil springs of a cross section having longer sides parallel t the length of the roller (5), and a U-shaped spring caps (7) each having a pair of side walls may be put on end on the side of the rollers (5) of the springs (6), respectively. |
