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What are the main components of a drive axle?

1 Answers

BlakelyAnn

07/30/25 7:28am

Drive axles generally consist of the main reducer, differential, wheel drive mechanism, and drive axle housing. A steering drive axle also includes a constant velocity universal joint. Additionally, the drive axle bears vertical forces, longitudinal forces, lateral forces, as well as braking torque and reaction forces between the road surface and the vehicle frame or body. The function of the drive axle is to transmit engine torque from the universal transmission to the drive wheels through the main reducer, differential, and axle shafts, thereby reducing speed and increasing torque. The bevel gears of the main reducer change the direction of torque transmission, achieve speed differential, ensure different turning speeds for the inner and outer wheels, and facilitate bearing and torque transmission. The drive axle is a structure located at the end of the transmission system that can alter the speed and torque of the transmission. Drive axles are categorized into non-disconnect test drive axles and disconnect drive axles. To match with independent suspension, the main reducer housing is fixed to the frame (or body), and the drive axle housing is connected in sections via hinges. To meet the need for independent vertical movement of the drive wheels, the axle shaft sections between the differential and the wheels are connected by universal joints.

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