Structure and function of axles
As a key component on the rear axle of a semi-trailer, the strength of the axle determines the load-bearing capacity of the axle. Among them, the axle head is a key part of the rear axle of a semi-trailer, and its strength and stability directly affect the safe operation of the whole vehicle. The axle head not only connects the wheel hub, brake drum, bearing and other wheel end components, but also serves as the basis for ensuring the stability of the wheel hub assembly. It can be said that the strength, toughness and precision of the axle head are like the foundation of a high-rise building, providing solid support for the safe and stable operation of the whole vehicle.
△ Classification of axle heads
The axle head structure of the rear axle of a semi-trailer can usually be divided into two categories: American and German. These two structures are also one of the main differences between American and German axles. From the appearance analysis, the shape of the American axle head is more standardized, mostly cylindrical, and the axle diameter is designed to be relatively thick.

