Automatic monitoring and anti-abrasion device for deviation of variable-pitch toothed belt of fan

The utility model discloses a fan variable pitch tooth-shaped belt deviation automatic monitoring and anti-abrasion device which comprises a machine body, an inner groove is formed in the machine body, a support is arranged in the inner groove, a telescopic spring is arranged on the surface of the support, one end of the telescopic spring is fixedly connected with the support, and the other end of the telescopic spring is fixedly connected with the machine body. The other end of the telescopic spring is fixedly connected with the inner groove, a rotating shaft is arranged at the end of the support, a rolling wheel is arranged on the surface of the rotating shaft, and a variable pitch shaft is arranged between the machine bodies. Through mutual cooperation of the machine body, the inner groove, the support, the telescopic spring, the rotating shaft, the rolling wheel, the variable pitch shaft, the toothed belt and other parts, when the toothed belt deviates, the toothed belt can make contact with the rolling w