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What is the function and principle of automobile reducer?

Publish Time: 2022-10-09 Origin: site

The reducer is a mechanism that can change the torque and speed of the drive axle. The basic function is to increase the torque from the transmission or universal transmission, while reducing the speed and changing the direction of torque transmission. The main reducer consists of one or several pairs of reduction gear pairs. Power is input by driving gear and output by driven gear. Now let's talk about the function of automobile reducer? The main reducer has two functions:


1. Change the direction of power transmission.


2. As an extension of the gearbox, it provides a common transmission ratio for all gears. The output of the transmission is the torque rotating around the longitudinal axis, and the wheels must rotate around the transverse axis of the vehicle, which requires a device to change the direction of power transmission. The reason why the main reducer is called the main reducer is that the transmission ratio of this device is a factor of the total transmission ratio, no matter what gear the transmission is in. Through this transmission ratio, the requirements on the deceleration capability of the transmission can be effectively reduced. The advantage of this design is that it can effectively reduce the size of the transmission and make the overall layout of the vehicle more reasonable.


The main function of automobile main reducer is to reduce speed and increase torque. We know that the output power of the engine is certain. According to the power calculation formula W=M * v (power=torque * speed), when the main reducer reduces the transmission speed, higher output torque can be obtained, so as to obtain greater driving force. In addition, the main reducer also has the function of changing the power output direction to achieve the differential speed between left and right wheels or the differential speed between the middle and rear axles.


The working principle of the automobile reducer is that when the output speed of the motor is input from the drive shaft, it drives the small gear to rotate, and the small gear drives the big gear to move. The number of teeth of the big gear is more than that of the small gear, and the speed of the big gear is slower than that of the small gear. Then the shaft (output shaft) of the big gear outputs, thus playing the role of output deceleration. All levels of gear transmission are used to reduce the speed to meet the work needs. The reducer is composed of gear pairs at all levels. If the gear with few teeth drives the big gear, the purpose of mechanical deceleration can be achieved. If the structure of multi-stage transmission is adopted, the mechanical deceleration and torque can be greatly increased.


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