Engine, gearbox and axle are the three major power core assemblies of trucks, although the axle is not as often mentioned as the engine and gearbox, but it plays a role in the process of automobile power transmission, and plays a decisive role in the power and stability of the whole vehicle. As one of the four major assemblies of heavy trucks (cab, engine, transmission, axle), the industry and technology development level of heavy truck axle is to a certain extent related to the development of the heavy truck industry.
 
The drive axle is an important system of the automobile drive train, which affects the power and economy of the car. At present, the trend of automobile development to energy saving, environmental protection and comfort requires the axle to develop in the direction of lightweight, high torque, low noise, wide speed ratio, long life and low production cost.