Nut rotating ball screw device for numerical control surface grinding machine

The nut rotating ball screw device for the numerical control surface grinding machine comprises a numerical control surface grinding machine body and an electric grinding head mechanism, and a ball screw is fixedly connected to the middle position of the top of the electric grinding head mechanism. The lead screw is installed on the upper side of the electric grinding head mechanism, the rotating nut drives the fixed lead screw to move vertically through the lead screw nut rotating device, the lead screw bears tensile stress and is not prone to deformation, the transmission precision of the lead screw is guaranteed, the lead screw does not penetrate through the grinding head, the lead screw is installed in the middle of the grinding head, and a guide rail is evenly stressed. The service life of the guide rail is prolonged, a motor synchronous belt wheel on the motor and a synchronous belt wheel installed on the rotating nut transmit rotating motion through a synchronous belt, the defect that the repeated prec