Reducer motors, called gear motors, are modularized and have larger output torque, i.e. 6 poles (output synchronous speed: 1000rpm) and 8 poles (output synchronous speed: 750rpm). Therefore, the speed of the motor is reduced by gear mechanism or other mechanisms (such as cycloid). However, the output speed or torque of motor can not meet the actual requirements, among which 4-pole motor is the most commonly used, because the speed used by equipment is generally relatively small, the higher the number of poles of motor, the more expensive it is. The common motor is 4 poles (output synchronous speed 1500rpm), which is a combination of reducer and motor. Reducer is a kind of transmission, which is generally used for transmission equipment with low speed and high torque. The principle is that the motor, internal combustion engine, motor or other power running at high speed meshes with the big gear on the output shaft through the gear with few teeth on the input shaft of reducer, so as to achieve the purpose of deceleration.

The ratio of the number of teeth of the big and small gears is the transmission ratio. Reducer is an independent component composed of gear drive, worm drive and gear worm drive enclosed in a rigid shell. It is often used as a reducer between the prime mover and the working machine?

It plays the role of matching speed and transferring torque between prime mover and working machine or actuator, and is widely used in modern machinery. Reducers can be divided into single-stage and multi-stage reducers according to different transmission stages, and factory wheel shape can be divided into cylindrical gear reducers, bevel gear reducers and bevel cylindrical gear reducers; According to the layout of the transmission, it can be divided into spread type, split type and shaft reducer.