The basic principle of the rice bran vibrating screen produced by Xinxiang Dayong Vibration Equipment Co., Ltd. is to convert the rotary motion of the motor into three-dimensional motion of degree, vertical and inclination by means of the heavy hammer (uneven hemispherical hammer) installed at the upper and lower ends of the motor shaft. This movement is then communicated to the sieve surface. It is assumed that changing the phase angle of the upper and lower weights can change the traveling direction of the raw material.