Grinding wheel cap servo device

The utility model discloses a grinding wheel cap servo device. A motor and reducer component is fixed on a motor base, the motor and reducer component is fixed with a drive screw rod by a coupler, a screw nut seat is arranged on the drive screw rod, the screw nut seat is fixedly connected with a grinding wheel cap by a guide rail shaft and a linear bearing, a protective cover is fixed outside the screw nut seat and on the motor seat, and two inductive switches and a displacement inductive switch are arranged in the protective cover. In the grinding wheel cap servo device, the grinding wheel cap can automatically track along with the size of a grinding wheel through electrical control so that the safe distance between the grinding wheel cap and the grinding wheel is kept. The grinding wheel cap servo device has elaborate structure, is flexible to use and is convenient for disassembly and assembly of the grinding wheel.