The reducer is a separate component consisting of a gear drive, a worm drive, and a gear-worm drive enclosed in a rigid housing. It is often used as a reduction gear between the prime mover and the work machine. The function of matching the rotational speed and transmitting torque between the prime mover and the working machine or the actuator is widely used in modern machinery.
The reducer is generally used for low-speed and high-torque transmission equipment. The motor, internal combustion engine or other high-speed power is transmitted through the gears on the input shaft of the reducer to mesh the large gears on the output shaft to achieve the purpose of deceleration. The reducer will also have several pairs of identical principle gears to achieve the desired deceleration effect. The ratio of the number of teeth of the large and small gears is the transmission ratio.