(Planetary gear reducer) operates based on the principle of gear reduction. In its internal structure, there is a gear at the fixed axis position, which we call the central gear, also often known as the sun gear. Around the sun gear, there are a type of special gears that not only rotate around their own axes but also revolve around the sun gear. These gears are named planetary gears. The component used to support the planetary gears is called the planet carrier. Power is transmitted to the shaft via the planet carrier and then to other gears.
This series of gears together form a gear train. It should be noted that in this gear train, there is only one original power input component. When there is only one prime mover in this situation, this epicyclic gear train is defined as a planetary gear train.
The principle of planetary gear reduction lies in achieving the adjustment of the input speed and torque by ingeniously designing the tooth number ratio among the sun gear, planetary gears, and planet carrier. When power is input to the sun gear, since the planetary gears mesh with both the sun gear and the ring gear (sometimes there may be no ring gear) simultaneously, the planetary gears, in the combined motion of rotation and revolution, change the output characteristics of speed and torque.
In practical applications, the planetary gear reduction device is widely used in many fields due to its compact structure, high transmission efficiency, and large load-carrying capacity, providing stable and reliable reduction transmission solutions for various mechanical equipment.