The invention relates to a first leaf spring bracket having a longitudinal axis and a transverse axis which is configured to be secured to a vehicle frame and which receives a rear end portion of a leaf spring so as to allow the leaf spring rear end portion to slide longitudinally relative to the first leaf spring bracket, characterized in that the first leaf spring bracket comprises an insert comprising an insert pad extending transversally and two perpendicular arms, the insert comprising a bottom surface and a top surface and being made of austempered ductile iron, and a bracket comprising a bracket pad extending transversally and two perpendicular arms, the bracket comprising a bottom surface and a top surface, the bottom surface of the bracket pad being configured to receive the top surface of the insert, the bracket being made of spheroidal graphite cast iron.

An embodiment composite material spring for a suspension device of a vehicle includes a leaf spring configured to be installed in a body of the vehicle and a wheel of the vehicle, a first fluid container installed at a left side of a center of the leaf spring and including a first magnetorheological fluid, and a second fluid container installed at a right side of the center of the leaf spring and including a second magnetorheological fluid.

An electrically controlled suspension includes a first spring with a first end and a second end, where the first end of the first spring is connectable to a forward frame bracket of a frame of a vehicle and where the second end of the first spring is connectable to a rear frame bracket of the frame of the vehicle via a rear spring support. The suspension includes a second spring with a first end and a second end, where the second end of the second spring is connected to the second end of the first spring. An electrically operated suspension control actuator is provided where the first end of the second spring is connected to the electrically operated suspension control actuator.

An X-shaped spring for a transportation vehicle wheel suspension system having, per wheel side, a first leaf spring and a second leaf spring made from fiber-reinforced arranged to lie above one another and combined at a respective first end on a first fastening device for transportation vehicle body-side support, wherein the first leaf spring has a second fastening device at its second end for wheel-side support, and the second leaf spring is supported at its second end on the transportation vehicle body side. Towards its second end, the second leaf spring is an arc section curved away from the first leaf spring.

A leaf spring bearing for supporting a leaf spring against a transportation vehicle body having a body-side coupling portion and at least one elastomer portion for compensating displacements transverse to the supporting direction. A centering apparatus for interlockingly engaging with a vehicle-body-side counter-contour is provided on the coupling portion. The centering apparatus on the coupling portion guides the coupling portion of the leaf spring bearing in the event of deviations from a target contact position on the transportation vehicle body transverse to the supporting direction, toward the target contact position. Also disclosed is a transportation vehicle wheel suspension having the disclosed leaf spring bearing and an assembly method.

A leaf spring bearing for supporting a leaf spring against a transportation vehicle body having a body-side coupling portion and at least one elastomer portion for compensating displacements transverse to the supporting direction. A centering apparatus for interlockingly engaging with a vehicle-body-side counter-contour is provided on the coupling portion. The centering apparatus on the coupling portion guides the coupling portion of the leaf spring bearing in the event of deviations from a target contact position on the transportation vehicle body transverse to the supporting direction, toward the target contact position. Also disclosed is a transportation vehicle wheel suspension having the disclosed leaf spring bearing and an assembly method.

The invention relates to a tracked vehicle (V1, V2) comprising a vehicle body (20; 120), at least one track assembly (10) and a suspension device (S). Said track assembly (10) is arranged to be supported by said vehicle body (20; 120) by means of said suspension device (S). Said track assembly comprises a track support beam (12) for supporting a plurality of road wheels (16), an endless track (14) being disposed around said road wheels. Said suspension device (S) comprises a leaf spring arrangement (30; 130, 142, 144) having portions transversally arranged relative to the longitudinal extension of the vehicle. Said leaf spring arrangement comprises L-shaped leaf spring members (30; 130), each leaf spring member (30; 130) having a first portion (32; 132) attached to said vehicle body (20; 120), a second portion (34; 134) attached to said track support beam (12) and a transition portion (36; 136) there between, so that compressive and tensile stresses are located to said transition portion (36; 136) for generating a compressive action in said transition portion.

An illustrative example composite leaf spring includes first and second bushing tubes near longitudinal ends. A ribbon of base material is wrapped at least partially around the first and second bushing tubes. The base material has a width that defines a width of the leaf spring. First portions of the base material are near the longitudinal ends and a second portion is between the first portions. The second portion is thicker than the first portions. A plurality of layers of a ribbon of tension material are wrapped around the base material. The tension material defines an outermost layer of the leaf spring. The tension material has warp strands in a longitudinal direction between the first and second longitudinal ends of the leaf spring and weft strands transverse to the warp strands. The warp strands establish a majority of a composition of the tension material.

An independent wheel suspension for a two-track vehicle has a wheel carrier, a vibration damper designed and arranged in the manner of a damper strut, and a leaf spring element, which has, in particular, a fiber composite material or is made from a fiber composite material. The leaf spring element is oriented at least approximately in the transverse direction of the vehicle and is designed to provide a suspension function and, together with the vibration damper, to guide a vehicle wheel fastened to the wheel carrier when the independent wheel suspension is installed in a vehicle for functional usage. The leaf spring element is connected, on the wheel carrier end, to the wheel carrier via two rubber bearings, each having a bearing axis and a central bearing point, so as to be rotatable about the respective bearing axis of each rubber bearing and is designed to be connected, on the vehicle body end, to an axle support in a torsion-resistant manner and/or directly to a vehicle body.

A leaf spring structure is designed as a single piece to be able to change the spring rates of leaf springs under a load independently from the manufacturing material. The operating mechanism of the leaf spring allows for increasing the spring rates by deactivating the short spring, which remains between the point A and the point B, as a result of the interaction between the short spring and the long spring after a certain amount of vertical displacement in the leaf spring.