A leaf spring is a mechanical device primarily used in vehicle suspension systems, and its main functions are as follows:

Weight Support: Leaf springs are designed to support the weight of a vehicle, maintaining it at the appropriate height and distributing the weight to the vehicle's 
wheels to ensure stable operation.

Absorbing Vibrations and Shocks: Leaf springs can absorb uneven road surfaces and impact forces, providing a smoother driving experience.
When a vehicle encounters rough terrain or obstacles, leaf springs 
help reduce body bounce and vibrations.

Maintaining Tire Contact with the Road: Leaf springs contribute to keeping the vehicle's wheels in contact with 
the road surface, ensuring good traction and handling. This is crucial for 
safe driving and vehicle stability.

Load Distribution: Leaf springs can be designed and adjusted to balance 
the load distribution between the front and rear axles as needed.
This helps ensure vehicle stability and handling performance.