| 摘要 |
A rotary motion one way-clutch having an outer race having a cylindrical inner peripheral surface, an inner race formed therein with a cam surface, a rolling element for transmitting a torque between the outer race and the inner race, an urging spring for urging the rolling element, and a weight element for pressing the rolling element in an engaging direction under a centrifugal force, overcoming an urging force of the urging spring, wherein a bearing member having a weight element operating surface for guiding the operation of the weight element and a bearing surface having a bearing action against the cylindrical inner peripheral surface of the outer race is provided between the outer race and the inner race.
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