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What about the damage and deformation of the front axle of the auto?

Release date:Aug 16,2021 Source:Yihe Axle 

During the use of the vehicle, the front axle is damaged due to long-term force on the front axle. In the process of vehicle maintenance, we must attach great importance to the research and analysis of the damage of the front axle, improve the attention to the safety performance of the front axle, and conduct in-depth research and analysis on the wear of the front axle, the crack of the front axle and the deformation of the front axle, Practical maintenance measures and methods are put forward.


[Key words] automobile maintenance; Front axle damage; Cause analysis; Maintenance measures


In the process of driving, the bearing of the front wheel inevitably bears various forces, which need to be transmitted to the suspension through the front axle; The front axle will be subjected to various forces, which needs to ensure that the automobile front axle has sufficient strength and stiffness. In the driving process of the vehicle, the friction between the steering knuckle and the front axle kingpin and the front axle must be minimized as much as possible, and the service life of the front axle must be prolonged as much as possible with the support of modern science and technology.

Analysis on the causes of automobile front axle wear


1.1 design idea analysis of automobile front axle

The front axle of an automobile mainly includes the front axle, kingpin and steering knuckle. The front axle is not only the main force point of the vehicle front axle, but also an important load-bearing part; In China's market, the front axle is mainly tubular or forged, but the forged front axle occupies the mode, and the section of the forged front axle is "I", which can ensure the stiffness and strength of the front axle; Two sides in the middle of the front axle are leaf spring support surfaces, which are used to install leaf springs and their accessories; The middle part of the front axle is designed to bend downward, which can reduce the installation position of the engine and the center of gravity of the vehicle; There is a thick part at both ends of the front axle, which presents the shape of a fist and has a hole in the middle, which is mainly used to install the kingpin.


1.2 cause analysis of automobile front axle wear

The main reasons for the hand wear of the front axle of the automobile are the gap in the kingpin hole and the wear of the leaf spring cushion. The main reasons for the wear are: when the automobile is in the form process, according to the use of the automobile, we can see that the vertical bending moment on the front axle is much greater than the horizontal bending moment. For this reason, the The transverse wear of the lower two end faces is obviously greater than the longitudinal wear, that is, the transverse force is greater than the longitudinal force; The fit between the kingpin hole of the automobile front axle and the kingpin during automobile operation is a transitional fit. The wedge-shaped cross pin in the middle is mainly to prevent the kingpin from jumping up and down and rotating. Except that the kingpin hole of the automobile is very easy to be worn, the surface of the leaf spring seat, the screw bolt hole and its positioning hole are very easy to be worn; The main reason for this wear phenomenon is that the clearance between the fastening bolt and screw of the leaf spring is too large, resulting in the relative movement between the positioning pin and the positioning hole during the operation of the vehicle, resulting in wear.


1.3 causes of automobile front axle crack

The main reason for the crack phenomenon of the automobile front axle is that the front axle is excessively bent due to stress during the operation of the automobile, and the metal structure of the front axle is excessively stressed. With the accumulation of time, it will cause fatigue and crack of front axle metal material.


1.4 the front axle of the vehicle is bent or distorted

When the vehicle is driving, the force of the ground will be transmitted to the front axle through the force of the wheel. At this time, the vertical force and lateral reaction force on the front axle will cause the vertical upward bending moment in the middle part of the front axle and around the kingpin hole. The wear of the kingpin hole on the right side of the front axle is greater than that on the left side.
【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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