Planetary gear reducer is also known as planetary reducer, gear reducer. In the reducer family, planetary gear reducer is widely used in automobile drive, communication antenna ESC system, precision medical equipment, smart home and other fields with its small size, high transmission efficiency, wide range of deceleration, high precision, long life and many other advantages.
The main structure of the planetary gear reducer by the planetary wheel, sun wheel, internal gear ring, drive shaft, drive motor combination; planetary gear reducer because of structural reasons, the single-stage deceleration of the small 3, generally not more than 10, common reduction ratio: 3/4/5/6/8/10, reducer level generally not more than 3, but there are some customized gear reducer with a 4-stage deceleration of the large reduction ratio. Relative to other reducers, planetary gear reducer has high rigidity, high precision (single stage can be achieved within 1 minute), high transmission efficiency (single stage in 97%-98%), high torque/volume ratio, life-long maintenance-free and so on.
Number of stages: number of sets of planetary gears. Since one set of planetary gears can not meet the larger ratio, sometimes 2 or 3 sets are needed to meet the requirement of embracing larger ratio. Due to the increase in the number of planetary gears, the length of the 2-stage or 3-stage reducer will be increased and the efficiency will be decreased.
Return clearance: When the output is fixed and the input is rotated clockwise and counterclockwise so that the input produces +-2% of the rated torque, there is a small angular displacement at the input end of the speed reducer, and this angular displacement is the return clearance. The unit is "minute", which is one sixtieth of a degree. It is also called backlash.
Use: automobile driver, communication antenna equipment, medical equipment, electronic products, household appliances, intelligent home equipment, intelligent kitchen and bathroom equipment, intelligent wearable equipment, massage and health care equipment, security equipment, optical equipment, photographic equipment, home audio-visual equipment, intelligent office equipment, robotics equipment, industrial automation equipment and so on.