The 3-stage micro planetary gear motor is a type of planetary gear motor, which is normally applied when high torque is needed in limited space. Planetary gearbox has better reliability and longer service life than spur gearbox.
The 3-stage micro planetary gear motor is named according to the number of stages of gear. A set of planetary gear motor includes sun wheel, planet gear, and ring gear.
The Reason Why the 3-stage Micro Gear Motor is Invented
When the reduction ratio of the 1-stage and 2-stage planetary gear cannot meet customer needs, a 3-stage micro planetary gear motor that meshes with more gear sets can provide a large gear ratio, meeting the demands.
Due to the increasing number of the planetary gear stages, the length of the motor with a 2-stage gearbox or 3-stage gearbox increases, and the efficiency reduces. Generally, there are 1-stage, 2-stage, and 3-stage gearboxes on the market, while ZHAOWEI provides motors with a 4-stage planetary gearbox.
The Structure of 3-stage Micro Planetary Gear Motor
The transmission structure of the planetary gear motor mainly consists of planet gear, sun gear, and ring gear. The characteristics of planetary gear transmission are small size, large loading capacity, and smooth operation. The transmission structure of planetary gear with high power and high speed is relatively complicated, which requires high precision.
The 3-stage planetary gear motor includes a shell, output device, and input device that coaxially and rotationally are assembled at the front and rear positions of the shell. The transmission structure of a 3-stage planetary gear set is between input and output devices and inside the shell. The output device is an output shaft, which is an internal spline sleeve. The transmission structure of planetary gear of all stages meshes with the ring gear, while the planet gears are assembled between the sun gear and ring gear, with the planet gear carrier. Sun gear of a 1-stage gearbox is integrally arranged with an output device. Apart from the planet gear carriers of a 3-stage gearbox, which are integrally arranged with an output device, planet gear carriers in other transmission structures, like 1-stage, 2-stage planetary gearboxes, are in coaxial transmission cooperation with lower-stage sun gear through splines.