| 摘要 |
<p>The invention provides a continuous excavating apparatus principally designed for use in mining operations and includes an endless bucket line arranged to pass over a boom and driven by a pair of sprockets. Adjacent buckets of the line are connected by a hinge pin having an enlarged end piece at each end of the pin. The enlarged end pieces, in operation, contact the pair of sprockets and roll on them with rolling friction to cause rotation of the center portion of the pins and thereby reduces wear.</p> |
