What Are Planetary Gear Reducers?
Planetary gear reducers are reduction gears that use planetary gears. Planetary gears are a mechanism that reduces speed by rotating two or three small gears around a gear attached to the input shaft, which in turn rotates the output shaft. The single gear at the center is called the sun gear, and the multiple smaller gears that rotate around it are called planetary gears. In addition, there is an internal gear on the outer circumference that assists the rotational motion of the planetary gears.
In order to extract the orbital motion of the planetary gears as output, the planetary gears are connected by a component called a planetary carrier.
Applications of Planetary Gear Reducers
Planetary gear reducers can incorporate multiple gears in a single mechanism, making it possible to reduce the size of the device compared to a reduction mechanism that combines multiple spur gears. This allows a large reduction ratio to be achieved with a single mechanism, which is an advantage when space and other constraints are limited, but it also has the disadvantage of increasing the number of parts due to the large number of gears.
However, it also has the disadvantage of requiring numerous parts due to the large number of gears.
Principle of Planetary Gear Reducers
Planetary gear reducers are reduction gears that use a planetary gear mechanism. The planetary gear mechanism consists of three gears: sun gear, planetary gear, and internal gear. The sun gear is used as the input shaft and the planetary gear revolving around it is connected by a planetary carrier and used as the output shaft. The internal gears are placed on the outer circumference to assist the orbital rotation and spinning of the planetary gears.
Planetary gear reducers have the advantages of a large reduction ratio with a single mechanism and a large transmission torque because the load can be distributed among multiple planetary gears, but they also have the disadvantages of a complicated mechanism that requires more frequent gear repairs due to severe adjustment of the gear center distance and more complicated gear ratio calculations. There are also disadvantages, such as more frequent gear repairs and more complicated gear ratio calculations. In addition, the gears themselves require high precision, which can lead to high costs in terms of machining, assembly, and other aspects of manufacturing.
Therefore, it is important to understand the conditions of use and manufacturing characteristics of planetary gear reducers before using them, or the disadvantages may be even greater.