YJB4 mining intrinsic safety type disc brake clearance alarm

The utility model relates to the technical field of mining monitoring equipment, discloses a YJB4 mining intrinsic safety type disc-shaped brake gap alarm instrument, and solves the technical problem that the conventional YJB4 mining intrinsic safety type disc-shaped brake gap alarm instrument generally does not have a position adjusting function. Comprising a gap alarm device body and a rectangular frame, a shell is fixedly arranged at the top end of the gap alarm device body, a positive and negative tooth screw rod is rotationally connected into the shell, limiting mechanisms are in threaded connection with the two sides of the positive and negative tooth screw rod, vertical plates are slidably connected with the two sides of the bottom end of the rectangular frame, and limiting grooves are formed in the bottoms of the two vertical plates; the two limiting grooves are connected with the two limiting mechanisms in a clamped mode correspondingly. According to the gap alarm instrument, the rectangular frame is