| 摘要 |
<p>A drive provides rotational movement and linear movement to an output. A first gear is operatively connected to the output, such as a roller. A drive assembly comprises a first cam surface, a second cam surface and a second gear. The first cam surface engages a first follower where the first follower is operatively connected to the output such that linear movement of the first cam follower results in linear movement of the output. The second cam surface engages a stationary follower. The second gear engages the first gear. The drive assembly rotates over a range of motion such that for a first portion of the range of motion the drive assembly causes the rotational and linear movement of the output and rotation of the drive assembly for a second portion of the range of motion causes only the rotational movement of the output.</p> |
