Underground borer with down hammer |
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| 申请号 | EP94303286.2 | 申请日 | 1994-05-06 | 公开(公告)号 | EP0627543A3 | 公开(公告)日 | 1995-08-02 |
| 申请人 | KENCHO KOBE CO., LTD.; Mo, Jeon Jin; | 发明人 | Mo, Jeon Jin; | ||||
| 摘要 | In an underground borer with down hammer having a vehicle body 1. a guide stilt 2 standing on the vehicle body, and a rotary machine 4 having its bottom coupled with a screw shaft 3 and a down hammer B. a supply unit 5 is interposed between the rotary machine 4 and the screw shaft 3, a fluid conduit 6 is formed centrally of the screw shaft 3, compressed air conduits 7 and 7' are formed to surround the fluid conduit 6. and a fluid jetting pipe 8 is arranged centrally of the down hammer B to extend until the inside of a bit body 9 so that water may be discharged, along with high-pressure compressed air, from a central portion of the bottom surface of the bit body during boring to cool the bit body, promote anti-wear properties, suppress powdery dirts, reduce noises and increase the boring speed. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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