The utility model discloses a detachable and replaceable
drill bit which comprises a
drill rod and a
drill bit body. One end of the drill rod is provided with a connecting part, the connecting part is sleeved with a locking piece, a spring and a locking ring, the locking piece and the spring are limited through the locking ring, the end face of the connecting part is provided with a limiting hole, and the outer wall of the locking piece is provided with two protruding blocks; a connecting groove is formed in the end face of the
drill bit, a protruding limiting block is arranged at the bottom of the connecting groove, an annular groove is formed in the side wall of the connecting groove, two guide grooves are formed from the annular groove to the end face of the
drill bit, and two limiting grooves extending towards the connecting groove are formed in the annular groove. The locking piece, the spring and the locking ring are arranged on the drill rod, the locking piece is matched with the limiting groove in the connecting groove of the
drill bit to achieve the locking function, the locking piece rotates to be disengaged from the limiting groove, namely the drill rod is separated from the drill bit, and therefore the convenience of quick disassembly and quick
assembly can be achieved, one drill rod can be matched with a plurality of drill bits, and the drilling efficiency is improved. The space of the storage box is saved, the overall weight is reduced, and carrying is more convenient.