3-stage micro planetary gear motor is a kind of planetary gear motor, which is normally applied when high torque is needed in limit space.Planetary gearbox has better reliability and longer service life than spur gearbox.
3-stage micro planetary gear motor is named according to the number of stages of gear. In the case of a small gear driving a big gear to decelerate, the gear motor is named stage1 micro planetary motor. The set of planetary gear of planetary gear motor includes sun wheel, planet gear and ring gear.
The reason why 3-stage micro gear motor comes out
When deceleration in 1-stage and 2-stage can not reach enough transmission ratio, 3-stage micro planetary gear motor in meshing transmission of multistage gear (planetary gear series with 3 or 4 sets) can meet the deceleration requirements.
Due to the increasing number of planetary gear, the length of gear motor in 2-stage or 3-stage increases, and the efficiency reduces. The stages of gear motor include 1-stage, 2-stage and 3-stage in normal, while the reduction ratio of ZHAOWEI planetary gear motor can reach 4-stage.
The structure of 3-stage micro planetary gear motor
The transmission structure of planetary gear motor mainly consists of planetary is planet gear, sun wheel and ring gear. The characteristics of planetary gear transmission are small size, great loading capacity and smooth running, while 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 shell(NO.4 in pic.), output device (NO.1) and input device (NO.15) that coaxially and rotationally assembled at that front and rear positions of the shell and transmission structure of 3-stage planetary gear set between input and output devices inside the shell(NO.4). output device (NO.1) is output shaft, and output device (NO.15) is internal spline sleeve. Transmission structure of planetary gear in all stages includes ring gear fixed with shell (NO.4), three planet gears assembled between sun wheel and ring gear,and planetary carrier. Sun wheel in stage-1 integrally arranged with output device (NO.1).Besides planetary carrier in 3-stage (NO.17) integrally arranged with output device (NO.15), planetary carriers in other transmission structure of 1-stage,2-stage planet gear are in coaxial transmission cooperation with lower-level sun gear through splines.