| 摘要 |
<p>The driving shaft is provided with a gear wheel (2) and a segment (3) without teeth. When the last tooth (10) of the wheel (2) comes out of engagement with the tooth (15) of the driven wheel (4), reverse rotation is prevented by the locking plate (7). The locking plate (7) is rigidly attached to the gear wheel (2) and has a circular outer edge (6) which matches the edge (8) of the plate (9) attached to the wheel (4). The wheel (4) is locked at the moment of disengagement of the teeth (10) and (15) since the edge (6a) makes simultaneous contact with the edge (12a) of the cut-out (12). The wheel (4) remains locked until the edge (6b) clears the edge (12b).</p> |
