| 摘要 |
A one-way clutch 10 has rollers 24, block bearings 30 and a cage 40 between outer and inner rings 21, 23. A cam surface 27 formed by a valley portion 25 and an inclined surface 26 is formed on an inner circumferential surface of the outer ring 21 so as to correspond to the rollers 24. A spring 33 is interposed between a recessed portion 31 of an inner circumferential surface of the outer ring 21 and a recessed portion of the block bearing 30 and biases the roller 24 against the cam surface 27 via the cage 40. The one-way clutch 10 engages when the inner ring 23 rotates along arrow F and idles when the inner ring 23 rotates along arrow R. Because the springs 3 are not necessarily provided for each of the rollers 24, the number of components is reduced and ideal torque capacity is obtained.
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