As the mainstream suspension form for commercial vehicles, leaf springs offer core advantages for both light and heavy trucks, including reliable structure, excellent load-bearing capacity, and easy maintenance. Meanwhile, their key focuses vary according to different vehicle positioning.
For light trucks, leaf springs mostly adopt a tapered leaf design with fewer leaves, focusing on lightweight construction and ride comfort. Their lower curb weight effectively increases the vehicle’s effective payload and reduces fuel consumption, making them suitable for urban distribution and short-distance transportation. With low friction between leaves, they deliver better ride smoothness and a more comfortable driving experience. The simple and compact structure takes up little space, facilitating chassis layout. Additionally, they are convenient to repair and replace at a low cost, balancing flexibility under light loads and support under medium-heavy loads to meet the multi-condition needs of urban and rural logistics.
For heavy trucks, leaf springs mainly feature a multi-leaf constant cross-section structure, with core strengths of super load-bearing capacity and high rigidity. The stacked multi-leaf design distributes force evenly, providing outstanding bending and impact resistance to meet heavy-duty working conditions such as sand and gravel, coal, and heavy equipment transportation. The high rigidity of the suspension minimizes body roll and ensures stable handling when fully loaded, especially adapting to complex road conditions such as mountainous areas, construction sites, and unpaved roads. Made of high-strength spring steel with enhanced treatment, they boast a long fatigue life and can withstand long-distance, high-intensity operation. Without complex electronic or hydraulic components, they feature strong environmental adaptability—high temperature resistance, dust resistance, and bump resistance—with an extremely low failure rate and controllable later maintenance costs, making them a highly cost-effective suspension choice for heavy-duty transportation.
Overall, leaf springs feature strong versatility and high reliability. Light trucks prioritize lightweight design, comfort, and flexibility, while heavy trucks focus on ultimate load-bearing capacity, durability, and stability. They can fully meet the application requirements of commercial vehicles under different loads and road conditions.
