| 摘要 |
<p>An improved trim chain take-up is provided for mining machines in which the trim chain extends around the rotary cutting auger and the auger support arm and is driven by the auger to cut clearance for the support arm. The takeup includes a yoke slideably mounted behind each auger support arm in guide means affixed to the machine framework, and supports a cylindrical idler roller in a manner allowing free rotation of the roller. The idler roller bears against the inner side of the endless chain loop and tensions the chain when the yoke is pushed away from the auger support arm by push means mounted either on the frame or integral with the yoke. A locking device in the embodiment of a self-actuating wedge-shaped spacer means is included with the take-up to be positioned between the take-up and auger support arm to prevent the take-up from backing off even when the push means relaxes.</p> |
