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Performance improvement technology of automobile rear axle

Release date:Dec 02,2021 Source:Yihe Axle 

In the field of auto parts, the rear axle is an extremely important component of the automobile chassis, which needs to bear the force in all directions during the driving process. Therefore, the stiffness, strength and fatigue life of automobile rear axle play a vital role in the safety and comfort of the whole vehicle. Among them, the design of wheel support and flange plate on automobile rear axle is to overcome the shortcomings of existing products. After improvement, a product design with simple structure, increased rear axle stiffness and fatigue and reduced manufacturing difficulty is proposed.

It is the connection diagram of wheel support and flange plate in automobile rear axle in the prior art. As shown in, the original design is to connect the flange plate 10 with the wheel support 11 through a complete weld a. the heat affected zone is too large and the beat is slow. The inner diameter of the central large hole 12 of the flange plate 10 and the wheel support 11 is also 34mm, and the inner diameter of the four small holes 13 is also 12.5mm. In the production process of the parts, it is impossible to ensure that the five holes on the two plates are completely concentric, which will lead to interference in the subsequent assembly process.

Schematic diagram of weld between wheel support and suspension arm in automobile rear axle in the prior art. The wheel support 11 is connected to the suspension arm 15 through three welds 14, and there is no overlap between the wheel support 11 and the shock absorber pin 16. Here, the overall strength of the automobile rear axle is weak, and early failure is easy to occur under the condition of alternating torsion.

The technical problem to be solved is to overcome the defects of weak overall strength of automobile rear axle and easy early failure under alternating torsion condition in the prior art, and provide an automobile rear axle.

It is solved through the following technical solutions:

The utility model relates to an automobile rear axle, which comprises a flange plate, a wheel support, a suspension arm and a shock absorber pin. The flange plate is welded on the wheel support, which is characterized in that at least one side of the flange plate is provided with a notch, and segmented weld welding is adopted between the side of the flange plate and the wheel support; The two sides of the wheel support are welded with the suspension arm respectively to form the first weld and the second weld; The bottom edge of the wheel support and the suspension arm are welded to form the third weld; The second weld is extended to the overlap between the wheel support and the shock absorber pin.

The flange plate and wheel support are welded by five section weld. A fourth weld is welded on the other side of the first weld formed between the side of the wheel support and the suspension arm, and the length of the fourth weld is 65mm. The upper and lower sides of the flange plate are respectively provided with a notch, the notch at the upper part and the wheel support are welded by two-stage weld, and the notch at the lower part and the wheel support are welded by an arc weld.

The left and right sides of the flange plate are welded with the wheel support respectively. The wheel support is provided with a central hole and a plurality of peripheral round holes. The diameter of the central hole is 35mm and the diameter of the peripheral round hole is 13mm.

Four peripheral round holes are arranged on the wheel support, and the peripheral round holes surround the central hole. The flange plate is provided with a central large hole and four peripheral small holes surrounding the central large hole. The central large hole on the flange plate covers the central hole on the wheel support, and the peripheral small hole on the flange plate covers the peripheral circular hole on the wheel support.

The effect of automobile rear axle reinforcement design lies in:

The design of the flange plate of the automobile rear axle is changed, the hollowing design is carried out without affecting the strength, and the weld is designed in sections, so as to reduce the weight of parts, shorten the weld length, reduce the beat, and reduce the impact of welding heat at the same time. The improved rear axle has the advantages of light weight, low machining accuracy, simple process, easy assembly, controllable welding deformation, high overall strength and stiffness and relatively low cost.

【Tag of this article】:Axle Front beam Truck axle Front Axle Steering Axles
【Editor】:Yihe Axleall rights reserved:https://chinaaxle.netPlease indicate the source

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