| 摘要 |
<p>1. A cutting arm for a rock cutting apparatus, comprising a frame structure (1) bordered by longitudinal members (2, 3), at the ends of which there are respectively mounted a drive wheel (17) and a return wheel (26) of an endless member (37) which externally carries cutting members (40) and which internally carries guide shoes (38) slidable in a groove (10), characterized in that the endless member comprises a belt (37) which internally carries guide shoes (38), each of which comprises a block extending over the entire width of said groove (10), the bottom (9 and 16) of which has injectors (11) for supplying a fluid which is spread out therein by the shoes (38) in movement thereof to form a layer of fluid which completely covers said groove (10), for permitting sliding movement of the shoes on said layer of fluid.</p> |
