Bladfjærer

Bladfjærer, also known as leaf springs, are a common type of spring used in the suspension system of vehicles. They are composed of a series of thin, curved metal plates, or leaves, stacked on top of each other. The leaves are typically made of steel and are tapered in thickness, being thicker in the center and thinner at the ends. This design allows the spring to bend and absorb shocks from the road surface.

The leaves are bound together at the center, often by a bolt or clamp, which also serves as the attachment point to the vehicle's axle. The ends of the spring are usually attached to the vehicle's frame using shackles, which allow the spring to lengthen and shorten as it deflects. This movement is crucial for maintaining tire contact with the road and providing a smoother ride.

Bladfjærer can be classified into several types, including semi-elliptical, full-elliptical, quarter-elliptical, and transverse. The semi-elliptical design is the most common in automotive applications, where the spring arcs over the axle. They are known for their durability and ability to carry heavy loads, making them suitable for trucks, buses, and older passenger cars. While their use has declined in favor of more advanced suspension systems in modern cars, they remain a significant component in many heavy-duty vehicles.