Crane motor insulation monitoring device

The utility model discloses an insulation monitoring device for a crane motor. The insulation monitoring device comprises a bottom plate, a supporting unit and a monitoring unit, the supporting unit comprises a supporting plate, a telescopic rod and a spring, the lower end of the telescopic rod is fixedly connected with the middle of the upper surface of the bottom plate, the upper end of the telescopic rod is fixedly connected with the side face of the middle of the supporting plate, the supporting plate is in an arc shape, and the telescopic rod is sleeved with the spring; the two ends of the spring are fixedly connected with the upper surface of the bottom plate and the side face of the middle of the supporting plate. The monitoring unit comprises a current transformer, a current-conducting plate, a grounding wire, a wire, an ampere meter and an audible and visual alarm, the current-conducting plate is arc-shaped, the insulation monitoring device for the crane motor can monitor the insulation capability of