What Are the Causes of Front Axle Damage and Deformation?
1 Answers
The reason is that vertical and lateral reaction forces generate bending moments in the vertical plane of the front axle, causing vertical bending in the middle of the front axle and near the kingpin holes. The bending and bending stress are greatest near the leaf spring seats, the kingpin holes, and the middle section of the front axle. As a result, the lateral wear on the kingpin holes and their upper and lower surfaces is greater than the longitudinal wear. Additionally, due to the greater upward force, the wear on the lower part of the kingpin holes is more severe than on the upper part. More details are as follows: 1. Definition of the Front Axle: The front axle is one of the main structures of a vehicle. The finished product is called the "front axle assembly." It uses the swing of the steering knuckle to achieve vehicle steering, hence it is also called the steering axle. Located at the front of the vehicle, it is also referred to as the "front bridge." To ensure safe driving, the front axle is equipped with appropriate front wheel alignment angles. 2. Working Principle: When the front axle is subjected to force, the kingpin can only swing with the transverse pin as the pivot point. Due to the large swing amplitude at both ends, the wear on the upper and lower parts of the kingpin holes is greater than in the middle. The wear on the leaf spring seat plane, positioning holes, and bolt holes is mainly caused by the relative movement between the leaf spring and the seat, the positioning pin and the hole, and the bolt and the hole when the leaf spring fastening bolts become loose during vehicle operation. The front axle is subjected to complex and variable forces, with vertical bending moments being the most significant. When the vehicle brakes, the load on the front axle increases. When the vehicle travels on uneven roads, the front axle is subjected to impact loads, which can easily cause metal fatigue and lead to cracks in areas with the highest bending stress.
