What is the difference between planetary gear reducer and general gear reducer

2021-11-22

The reducer is generally used for the transmission equipment with low speed and large torque. The motor, internal combustion engine or other high-speed running power is used to achieve the purpose of speed reduction by meshing the small number of teeth on the input shaft of the reducer with the large gear on the output shaft. The ordinary reducer will also have several pairs of gears with the same principle to achieve the ideal deceleration effect. The ratio of the number of teeth of the large and small gears is the transmission ratio. The reducer is a power transmission mechanism, which uses the speed converter of the gear to reduce the rotation of the motor to the required number of revolutions and obtain a larger torque.

Type of reducer

General reducers include helical gear reducers (including parallel shaft helical gear reducers, worm gear reducers, bevel gear reducers, etc.), planetary gear reducers, cycloidal pinwheel reducers, worm gear and worm gear reducers, planetary friction mechanical stepless transmissions, etc.

Characteristics of common reducer types

1) The main feature of worm gear reducer is that it has reverse self-locking function and can have a large reduction ratio. The input shaft and output shaft are not on the same axis or plane. However, it is generally large, with low transmission efficiency and accuracy.

2) The harmonic drive of the harmonic reducer uses the controllable elastic deformation of the flexible elements to transmit the motion and power, which is small in size and high in accuracy. However, the disadvantages are the limited life of the flexible wheel, the impact resistance, and the rigidity is poor compared with the metal parts. The input speed cannot be too high.

3) The advantages of planetary reducer are compact structure, small return clearance, high accuracy, long service life, and large rated output torque, but the price is slightly expensive.

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