The basic structure of the worm gear reducer is mainly composed of the worm gear, the shaft, the bearing, the box body and its accessories. Can be divided into three basic structural parts: box, worm gear, bearing and shaft combination. The box is the base of all the accessories in the worm gear reducer. It is an important part that supports the fixed shaft parts, ensures the correct relative position of the transmission parts and supports the load acting on the reducer. The main function of the worm gear is to transmit the motion and power between the two staggered shafts. The main function of the bearing and the shaft is power transmission, operation and efficiency. RV is a transmission device usually used for low-speed and high-torque. The motor, internal combustion engine or other high-speed operation power is transmitted through the gear on the input shaft of the reducer to mesh the large gear on the output shaft to reach the intention of deceleration. The reducer will also have several pairs of the same principle gear to reach the deceleration effect of the interest, the ratio of the number of teeth of the large gear is the transmission ratio. The reducer is a power transmission organization that uses a gear speed converter to decelerate the number of revolutions of the motor to the desired number of revolutions and to obtain a tissue with a large torque. In the current mechanisms for transmitting power and motion, the range of applications of the reducer is quite extensive.