LEAF SPRING FOR A VEHICLE

The invention concerns a leaf spring (1, 2) for a vehicle suspension system, the leaf spring (1, 2) comprising a middle leaf plate (4) located between an upper leaf plate (5) and a lower leaf plate (3) and a center bolt (6) extending through an aperture (8a, 8b, 8c) of each of the leaf plates (3, 4, 5) at a central region (9) of the leaf spring (1, 2), wherein the middle leaf plate (4) has a wavy structure in the longitudinal direction where troughs and crests of waves (20) of the wavy structure form longitudinally distributed contact points (21) for transfer of load between the middle leaf plate (4) and the upper and lower leaf plates (3, 5), wherein the center bolt aperture (8b) of the middle leaf plate (4) has an elongation in the longitudinal direction that is greater than that of the center bolt aperture (8a, 8c) of the upper and lower leaf plates (3, 5) so as to allow the middle leaf plate (4) to move in the longitudinal direction relative to the upper and lower leaf plates (3, 5), wherein the middle leaf plate (4) is slidably arranged relative to the upper and lower leaf plates (3, 5) in the longitudinal direction.