Vääntösauvaa

Vääntösauvaa, often translated as torsion bar, is a type of spring used in vehicle suspension systems. It is essentially a long, solid metal bar that, when one end is twisted, stores and releases energy. One end of the torsion bar is fixed to the vehicle's chassis, while the other end is connected to a suspension arm. As the wheel encounters a bump or dips into a hole, the suspension arm moves, causing the torsion bar to twist. This twisting action acts as a spring, absorbing the shock and returning the suspension arm to its original position.

Torsion bars offer several advantages. They are relatively simple in design and can be very durable. They also allow for a compact suspension design, as they can be mounted longitudinally or transversely within the vehicle's frame, freeing up space that might otherwise be occupied by coil springs or leaf springs. This space-saving aspect has made them popular in various types of vehicles, including some cars, trucks, and military vehicles. The stiffness of the torsion bar can be adjusted by changing its diameter, length, or material, allowing manufacturers to fine-tune the suspension's ride and handling characteristics.