Automatic change drilling

The utility model relates to an automatic drilling technical field, and disclose an automatic change drilling, including the base, the last fixed surface of base is connected with the stand, the top fixedly connected with bearing of stand, and the top of bearing and the bottom swing joint of pivot, the top of pivot and the output shaft fixed connection of first motor, the fixedly connected with sleeve is located to the outer wall of pivot, the swing arm of telescopic outer wall fixedly connected with, one side fixedly connected with second motor of swing arm outer wall. This automatic change drilling through setting up fan, first tuber pipe and air outlet, utilizes fan work to discharge wind from the air outlet, has reached the effect that blows away the sweeps below the cutter when the cutter work, has avoided the sweeps to stockpile the problem of the normal work that influences the cutter, has lengthened the life of equipment, utilizes in the air pump collects the dust hopper with the sweeps, has reached t