Planetary gear speed reducers are a core reduction equipment in the industrial transmission field. Its core structure consists of a sun gear, planetary gear, inner ring gear, and planetary carrier, and is widely used in scenarios such as robot joints, machine tool spindles, and new energy vehicle drive systems.
Its working principle is that power is transmitted from the input shaft to the sun gear, which drives the planetary gears that rotate around it. The planetary gears roll along the inner gear ring at the same time, and finally transmit the reduced power to the output shaft through the planetary carrier, achieving speed reduction and torque amplification.
This reducer has outstanding advantages, high transmission efficiency (usually up to 90% -98%), and low energy loss; Compact structure, with a much smaller body area than cylindrical gear reducers for the same reduction ratio, saving installation space; Strong load-bearing capacity, multiple gears simultaneously mesh to disperse loads, and can withstand large impact torques. Common applications include joint drives for industrial robots, feed systems for precision machine tools, and powertrains for electric vehicles.
However, its manufacturing accuracy requirements are high, and the maintenance cost after gear wear is high. When selecting, it is necessary to accurately match the working conditions with parameters such as transmission ratio, rated torque, and working speed.
