The difference between planetary gearbox and ordinary gear reducer

Actually, the planetary gearbox is a kind of gear reducer if it is to be classified. Like most gear reducers, the planetary reducer reduces the speed and increases the output torque through gear transmission. However, compared with the common gear reducer, the structure of the planetary gearbox is more compact and reasonable, which makes full use of all the parts to work for the reduction drive. Ordinary gear reducers reduce the speed through the meshing of the gears. In addition to the meshing between the gears, the planetary reducer works also passing through a planetary structure. The principle is that the planets rotate around the sun gear. The sun gear acts as the origin, that is,   the input shaft gear of the motor drives the planet gears of the planetary gearbox. And there are also teeth inside of the planetary reducer shell to participate in the deceleration work of the planetary reducer. With such structure, not only precision is greatly improved, but also large reduction ratios can be achieved through adding multiple planetary gear combinations in the same planetary reducer, which, at the same time, will not affect the structure and strength of the planetary reducer itself.