Torque limiter

The utility model relates to the technical field of torque limiters, in particular to a torque limiter. According to the technical scheme, the device comprises an input shaft, a sealing sleeve A, a sealing sleeve B and an output shaft, the outer surface of the input shaft is sleeved with a moving ring, the outer surface of the moving ring is sleeved with a disc spring, one end of the output shaft is fixedly connected to a rotating ring, the outer surface of the input shaft is sleeved with the rotating ring, and a gear ring B is welded to the outer side of the rotating ring; a gear ring A is welded to the position, between the disc spring and the rotating ring, of the outer surface of the input shaft, a steel ball is arranged between the gear ring A and the gear ring B, a pressing ring is arranged between the disc spring and the steel ball, fan blades are welded to the outer surface of the pressing ring, the outer surface of the moving ring is sleeved with a sealing sleeve A, and the outer surface of the outpu