The leaf spring plays a buffering role in the truck suspension system, and is also responsible for transmitting all forces and moments in all directions, as well as determining the track of wheel movement, and playing a guiding role. Compared with airbag suspension, leaf spring is widely used on trucks because of its simple structure, low cost and convenient maintenance.
In the process of vehicle operation, abnormal use and lack of good maintenance awareness will cause the leaf spring to be damaged in advance. The following is a summary of the causes of damage to the leaf spring and how to avoid such a situation.
Vehicle overloaded for a long time
The leaf spring is originally designed according to the design loading weight of the vehicle. If it is overloaded for a long time, the leaf spring will be subject to excessive bending stress, which will reduce the fatigue strength of the leaf spring, so it is easy to fracture the leaf spring. Overload will not only damage the leaf spring, but also cause certain damage to the engine and transmission components, and excessive tire wear.
Suggestion: Try to ensure that the vehicle is not overloaded or overloaded, and reasonably utilize the vehicle's performance.
Driving speed too high
Driving at an economical speed can ensure safety and save fuel. However, if some vehicles drive at a high speed, especially on poor roads, the deformation amplitude of the leaf spring will increase and the frequency will increase, which will accelerate the damage of the leaf spring. These situations occur more frequently on dump trucks, most of which operate on earthwork and construction sites. The road conditions are relatively poor, and some drivers blindly pursue economic benefits. Overloading and high-speed driving accelerate the fatigue of the vehicle and lead to body damage. In addition, such driving habits are also unsafe.
Suggestion: Vehicles should drive lowly on harsh road sections, especially when crossing ditches. Slow down in advance and avoid crossing ditches with brakes.
Vehicle speed on curved roads
When the vehicle goes through a bend, it will generate a large centrifugal force. For example, when the vehicle goes through a turn and turns quickly, the larger centrifugal force will increase the load of the leaf spring on the outside of the vehicle at the same time, which will cause the deformation of the leaf spring, causing the stress of the leaf spring on the outside to be too large, fatigue and fracture.
Suggestion: The vehicle should slow down when turning, with low and medium speeds being the optimal speed, which is both safe and can reduce vehicle malfunctions.