What is a square reducer[汽车基本知识]

Drive axleBy the main reducer, differential,Half shaftAnd driveAxle housingIt is composed of several parts, and its function is to transfer the engine torque from the universal transmission to the driving wheels to reduce the speed to increase the torque.

The main reducer iscarReduced in the drive trainRotating speed, The main component to increase torque. For cars with vertical engines, the final drive also uses bevel gear transmission to change the direction of power.

When a car is running normally, the engine speed is usually around 2000 to 3000r/min. If such a high speed is reduced by the gearbox alone, then the transmission ratio of the gear pair in the gearbox needs to be large, and the transmission of the gear pair The larger the ratio, the larger the radius ratio of the two gears, in other words, the larger the size of the gearbox. In addition, the speed drops and the torque will inevitably increase, which increases the transmission load of the gearbox and the rear-stage transmission mechanism of the gearbox. Therefore, a final drive is installed before the differential that splits the power to the left and right drive wheels, so that the transmission components in front of the final drive, such as the gearbox,Splitter, The torque transmitted by the universal transmission device is reduced, and the size and mass of the gearbox can also be reduced, and the operation is labor-saving.

Spiral bevel gears and hyperboloid gears are widely used in the final drive of modern cars. When the hyperboloid gear is working, the pressure and sliding between the tooth surfaces are large, and the oil film on the tooth surface is easy to be damaged. Hyperboloid gear oil must be used for lubrication. It is never allowed to replace with ordinary gear oil, otherwise the tooth surface will be quickly scratched and worn. , Greatly reducing the service life.

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