The main transmission structure of the planetary gear reducer is: planetary gear, sun gear, inner ring gear.
Due to structural reasons, the planetary reducer has a minimum of 3 for single-stage deceleration and a maximum of 10 for maximum. The common reduction ratio is 8.10. The number of reduction gears is generally not more than 3, but there are some large reduction ratios. Compared with other reducers, planetary reducers have high rigidity, high precision (single level can be less than 1 point), high transmission efficiency (97%-98% for single stage), high torque/volume ratio, lifetime maintenance free, etc. Features. Because of these characteristics, planetary reducers are mostly installed on stepper motors and servo motors to reduce the speed, increase the torque, and match the inertia.