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How Does Gearbox Work

Aug 21, 2017

                                                   How does Gearbox Work?

All gearboxes work in a similar fashion. The directions the gears rotate are dependent on the input direction and orientation of the gears. For 

example, if the initial gear is rotating in a clockwise direction, the gear it engages will rotate counterclockwise. This continues down the line for 

multiple gears. The combination of different size gears and the number of teeth on each gear plays a significant role in the output torque and speed 

of the shaft. High gear ratios allow for more output torque and lower speeds, while lower gear ratios allow for higher output speed and less output 


A planetary gearbox works relatively the same. A planetary gearbox system is constructed with three main components: a central sun gear, a planet 

carrier (carrying one or more planet gears) and an annulus (an outer ring). The central sun gear is orbited by planet gears (of the same size) 

mounted to the planet carrier. The planet gears are meshed with the sun gear while the outer rings teeth mesh with the planet gears. There are 

several configurations for a gearbox system. Typical configurations consist of three components: the input, the output and one stationary 


For example: one possible configuration is the sun gear as the input, the annulus as the output and the planet carrier remaining stationary. In this 

configuration, the input shaft rotates the sun gear, the planet gears rotate on their own axes, simultaneously applying a torque to the rotating planet 

carrier that in turn applies torque to the output shaft (which in this case is the annulus). The rate at which the gears rotate (gear ratio) is determined 

by the number of teeth in each gear. The torque (power output) is determined by both the number of teeth and by which component in the planetary 

system is stationary.https://ttmotorhk.en.alibaba.com  

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