Underground metal drill bit clamp for coal mine

The invention relates to an underground metal drill bit clamp for coal mine. The underground metal drill bit clamp comprises a chuck and a screw mounted on the tail part of the chuck, wherein the chuck is in threaded fit to the front end of the screw; the tail end of the screw is connected with a power source through a bolt; the chuck is one of a drill bit, a grinding head or a screw tap head; the power source is a pneumatic trigger or a wind coal drill; a spiral slot is formed in the screw; and the spiral slot is close to the front end of the screw. The underground metal drill bit clamp has the advantages that: the underground metal clamp for coal mine is developed for adapting to a special underground using condition, the clamp can be matched with drill bits, grinding heads, screw tap heads and the like of various specifications, is relatively wide in scope of application, is especially matched with various pneumatic and hydraulic tools, and is simple and easy to operate. 本发明涉及种煤矿井下用金属钻头夹具，包括夹头以及安装在夹头尾部的螺杆，