| 摘要 |
A rotation transmitting system comprises drive and driven wheels mounted on a stationary hub for rotation about a common axis. Radially spaced surfaces on the hub and driven wheel form a space in which clamping bodies are mounted. The space includes wedge portions in which the bodies are disposed, and a spring biases the bodies in a locking direction whereby the bodies prevent rotation of the driven wheel in respective directions of rotation. The drive wheel carries a claw member which forces a respective body out of its locking position when the driven wheel is rotated in either direction, thereby unlocking the driven wheel for rotation. A lost-motion connection between the drive and driven wheels connects those wheels for common rotation after the driven wheel has been unlocked.
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