| 摘要 |
Drill wrench apparatus for use with a drill bit, drilling steel, and a drive source for drilling a hole in the ceiling of a mine is disclosed. The drill wrench (18) includes a first end (50) having a non-circular aperture (58) suitable for receiving a hexagon-shaped drill bit shaft and the square head of a ceiling bolt. A central portion (52) connects first end (50) to second end (54) which also defines a non-circular aperture (38) extending through the wrench (18) to allow the removal of drill dust and debris. The second end (54) is cylindrically shaped, and includes pipe threads (62) on the outside surface suitable for meshing with threads (74) on the inside surface of a binding ring (72). The second end has a non-circular aperture (63) for receiving a hexagonal drill steel, and also defines a conical end surface (64). Binding ring (72) includes a bearing surface (76) for forcing a resilient annular shaped member (68) into the concave recess (64 ). Thus when a drill steel (20) is inserted in aperture (63), resilient member (68) positioned around drill steel (20) may be forced into recess (64) such that it tightly grasps drill steel (20) to prevent unintentional separation of the drill steel from the wrench.
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