Leaf spring, also known as steel leaf spring, has the following structure and function:
I. Structure
Main Leaf and Auxiliary Leaf
Generally, it is composed of several spring steel sheets of different lengths, curvature radii, and equal widths. The main leaf is usually the longest leaf, with a curling ear in the center, which is installed on the bracket or hanging ear on the frame. The length of the auxiliary leaf decreases in sequence and is stacked on the main leaf.Curling Ear
The two ends of the leaf spring are bent to form curling ears, which can be connected to the bracket or hanging ear on the frame through a pin, allowing the leaf spring to elastically deform with the movement of the wheel during the vehicle's driving.Center Bolt
This bolt is used to fix each spring steel sheet together to prevent them from being misplaced during operation.Spring Clip
Installed between adjacent spring leaves, it plays a role in fixing and positioning to prevent lateral movement between spring leaves.
II. Function
Load-Bearing
Leaf springs can bear the vertical load of the vehicle, including the weight of the vehicle body, passengers, and cargo. When the vehicle is stationary or driving on a flat road, the leaf spring supports the weight of the vehicle through its own elastic deformation, maintaining the vehicle's height stability.Shock Absorption
When a vehicle drives on an uneven road, the impact force on the wheel is transmitted to the leaf spring through the suspension system. The leaf spring absorbs and buffers these impact forces through its elastic deformation, reducing vibration and bumps of the vehicle body and improving riding comfort.Transmitting Force and Torque
During driving, the leaf spring not only bears the vertical load but also transmits the longitudinal force (driving and braking force) and lateral force (steering force) from the wheel. It transmits these forces and torques to the frame through the connection with the frame and axle, enabling smooth vehicle driving and turning.Maintain Wheel Positioning
The stiffness and elastic properties of the leaf spring help position the wheel, limiting up-and-down jumping and left-and-right swinging, keeping the wheel in the correct position, and ensuring driving stability and handling of the vehicle.
