Quantitative feeding device of grinding machine

A quantitative feeding device of a grinding machine comprises a closed belt supported by a plurality of supporting rotating rollers and a frame body, the belt evenly penetrates through a deep conveying groove, a driving rotating shaft driven by a pushing motor to rotate is located on the axis of a material storage disc, and arc-shaped pushing plates distributed around the center of the driving rotating shaft are fixed to the side walls of the periphery of the driving rotating shaft correspondingly; a sliding platform is supported below the upper portion of the belt through supporting legs, a weighing groove is formed in the sliding platform below one conveying groove, a discharging opening used for discharging is formed in the bottom face of the material storage disc above the conveying groove on the front side of the weighing groove, a weighing sensor is arranged in the weighing groove, and a horizontal weighing plate is arranged at the detection end of the weighing sensor. The upper surface of the weighing