Power head for coal mine all-dimensional automatic drilling machine

The utility model discloses a power head for a coal mine all-dimensional automatic drilling machine. The power head comprises a power head shell, a power head output main shaft, a power head motor, a chuck and a transmission structure arranged between the power head motor and the power head output main shaft. A water supply transmission device is fixed in the power head output main shaft; the water supply transmission device comprises a transmission rod assembly arranged in the power head output main shaft and a water supply assembly arranged in the transmission rod assembly. The transmission rod assembly comprises a rod body and a connector detachably arranged at one end of the rod body. The water supply assembly comprises a water supply sleeve, a water supply shaft and a water distribution seat. By means of the detachable assembly and disassembly transmission rod assembly in the output main shaft of the power head, in the drilling or pulling-out process, the driving drill rod drives other drill rods to dril