| 摘要 |
<p>An overdrive protection system and method for a mechanical assembly is provided. A cam gear is provided for driving a part. The cam gear includes a cylindrical outer surface is bounded on one end by a gear drive portion and on the other end by a cam face including a cam wedge. Additionally a cam groove is defined on the cylindrical outer surface of the cam gear, the cam groove engaging a cam follower on the driven part. Rotational movement of the cam gear is translated into a resultant linear movement of the part. At a predetermined position during the rotation of the cam gear, the cam wedge closes a switch, stopping the rotation of the cam gear preventing over rotation of the cam gear. A bias mechanism, such as a leaf spring, may be provided to prevent over rotation of the part driven by the cam gear.</p> |
