Planetary gearbox one

Several concepts of planetary gearbox: Stage: Number of sets of planetary gears Due to the inability of one set of planetary gears to meet larger transmission ratios, sometimes 2 or 3 sets are needed to meet the requirement of supporting larger transmission ratios Due to the increase in the number of planetary gears, the length of the 2nd or 3rd stage gearbox will increase and the efficiency will decrease Return clearance: When the output end is fixed and the input end rotates clockwise and counterclockwise to generate a rated torque of+-2%, there is a slight angular displacement at the input end of the reducer, which is the return clearance The unit is' fen ', which is one sixtieth of one degree Some people also call it a back gap The main transmission structure of the planetary gearbox is: planetary gear, sun gear, and external gear ring Due to structural reasons, the minimum single-stage reduction of planetary reducers is 3, and the maximum is generally not more than 10. The common reduction ratio is 3.4.5.6.8.10, and the number of reducer stages generally does not exceed 3. However, some customized reducers with large reduction ratios have 4 stages of reduction Compared to other reducers, planetary reducers have the characteristics of high rigidity, high precision (up to 1 point per stage), high transmission efficiency (97% -98% per stage), high torque/volume ratio, and lifetime maintenance free