The Axle Head Structure Of American Rear Axle Of Semi-trailer Is Divided Into Several Typeswhich Axle Head Has Higher Strength And Longer Effect

The axle is one of the core components on the rear axle of the semi-trailer. The strength of the axle is directly related to the bearing capacity of the axle. For the axle, the performance of the axle head is very important.
The axle head is the key part of the axle connecting the wheel hub, brake drum, bearing and other wheel end components. Whether the performance of the subsequent wheel hub assembly is stable depends largely on the strength, toughness and accuracy of the axle head. For example, if the wheel end is a high-rise building, then the axle head is the foundation. Only when the foundation is laid can the building be solid and stable.
Generally speaking, the axle head structure of the rear axle of semi-trailer can be divided into two categories: American and German, which is also one of the main differences between American and German axles.
From the appearance, the shape of American shaft head is relatively regular, basically cylindrical, and the shaft diameter is relatively thicker;
The shape of the German shaft head is relatively complex, with more inclined planes, and is generally thinner.
This leads to thicker axle heads of American type axles, higher strength of the parts connected with the bearings, and higher load that can be borne;
The diameter of German axle head is smaller, relatively thinner, and the production accuracy requirements are high. Its advantages are more concentrated in the self-weight, which is more in line with the trend of lightweight.
Strictly speaking, there is one difference between the American axle and the German axle: the connection between the axle head and the axle tube is different.
The axle head and axle tube of the American type axle are integrated and are made from a steel pipe, and the two are naturally connected;
The axle head and the axle tube of the German axle are "three-piece", that is, the axle heads at both ends and the axle tube in the middle are made separately, and then fused together by welding technology.
Different production methods bring different product advantages:
There is no manual welding between the axle head and the axle tube of the American axle, which fully avoids the welding deformation. The strength of natural connection is high, and the ability of resisting heavy load is also stronger;
The axle head of the German axle is welded subsequently, and the connection angle between the axle head and the axle tube can be artificially interfered with to achieve the purpose of tire saving and fuel saving.
However, at present, the axles produced by domestic axle factories, whether American or German, basically adopt the "integrated" heat treatment technology, that is, the axle head and axle tube are directly formed from a steel pipe. To some extent, this is also to meet the needs of the domestic freight market.
In general, American axles have high cost performance, relatively low purchase cost, good heavy-load performance, large inventory and more convenient maintenance; The disadvantages are heavy self-weight and relatively high maintenance frequency. In general, American axle can be widely used in all kinds of general cargo transportation conditions, especially in the transportation of heavy goods such as gravel, steel coil, wood, coal, etc.
German axle has light dead weight, relatively good heat dissipation and braking performance, stronger stability and reliability, less tire and fuel consumption, long maintenance cycle and relatively longer efficiency; The disadvantage is that the price is high, the front cost is high, and the accessories are also difficult to buy. Generally, German axles are more widely used in long-distance transportation with standard load, especially in the transportation of valuables or complex mountain roads, and the demand for German axles is higher.