Drilling tool |
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| 申请号 | JP7078389 | 申请日 | 1989-03-24 | 公开(公告)号 | JPH01290889A | 公开(公告)日 | 1989-11-22 |
| 申请人 | Hilti Ag; | 发明人 | ERUMARU MAIAA; | ||||
| 摘要 | PURPOSE: To retreat a drilling tool from a hole by rotating the drilling tool in the opposite direction of the work rotating direction by arranging fastening shoulde parts on both sides of an area extending in the axial direction, and arranging a part expansively opening in the circumferential direction in an area corresponding to a projecting part in a cutout. CONSTITUTION: When inserting a drilling tool, a butting shoulder part 4a of a projecting lug 4 butts against an expansively opening part 7c opposed in the circumferential direction to be hookingly joined to an expansively opening part 8b of the other cutout 8. When rotatably driving a holder 1 in the clockwise direction, the projecting lug 4 transmits rotary motion to a cutter head 2 by the shoulder part 4a. In retreating the drilling device from a formed hole, when rotating the holder 1 in the anticlockwise direction, the lug 4 is hookingly joined to an expansively opening part 7b, and a butting shoulder part 5a of a projecting lug 5 is hookingly joined to an expansively opening part 8c to transmit rotation of the holder 1 to the head 2. The drilling device is rotated by manual operation, and a lock of the head 2 is released so that the device is pulled out of the hole. | ||||||
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| 说明书全文 | |||||||
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