Disclosed are a vehicle suspension spring device and a vehicle suspension system having the same. The vehicle suspension spring device includes a leaf spring unit comprising at least one leaf spring disposed in a lateral direction of a vehicle, a pair of first coupling parts provided at opposite ends of the leaf spring unit in a longitudinal direction and rotatably coupled to a pair of axles on which opposite wheels of the vehicle are mounted, and a pair of second coupling parts provided at two points between the opposite ends of the leaf spring unit in the longitudinal direction to be rotatably coupled to a subframe of the vehicle.

A vehicle leaf spring shackle includes pair of longitudinal plate members opposed to each other, pair of devices for connecting the pair of longitudinal plate members to each other at their opposite end portions with respective predetermined spacing distances, and between pair of longitudinal plate members, one pair of devices is coupled to a member of a vehicle body while other pair of devices is coupled to one end portion of a leaf spring device provided to suspend the vehicle body. At least one end portion of the pair of longitudinal plate members on the leaf spring device side including a thick-walled portion formed with thickness larger than other portions of the pair of longitudinal plate members, the thick-walled portion is formed by press-forming operation to press at least one end portions of the longitudinal plate members on the leaf spring device side, in direction of the end portion plane.

A vehicle leaf spring shackle includes pair of longitudinal plate members opposed to each other, pair of devices for connecting the pair of longitudinal plate members to each other at their opposite end portions with respective predetermined spacing distances, and between pair of longitudinal plate members, one pair of devices is coupled to a member of a vehicle body while other pair of devices is coupled to one end portion of a leaf spring device provided to suspend the vehicle body. At least one end portion of the pair of longitudinal plate members on the leaf spring device side including a thick-walled portion formed with thickness larger than other portions of the pair of longitudinal plate members, the thick-walled portion is formed by press-forming operation to press at least one end portions of the longitudinal plate members on the leaf spring device side, in direction of the end portion plane.

A leaf spring device includes a main leaf made of a steel plate including an elastic section configured to generate elastic force when bent; and an eye section formed in an end portion of the elastic section, the elastic section and the eye section being tempered. There is also provided a method for manufacturing the leaf spring device. The eye section is formed by rolling the end of the elastic section into a circular form. The eye section is tempered at a higher temperature than the elastic section.

A leaf spring, particularly for articulated mechanical structures, includes at least one longitudinally extended elastic element and a pair of rigid elements which are configured to be associated with an articulated mechanical structure. Each one of the rigid elements is coupled rigidly, at a first end thereof, to a respective end of the elastic element. The elastic element is not associated with any constraint or load between its two ends.

A leaf spring, particularly for articulated mechanical structures, includes at least one longitudinally extended elastic element and a pair of rigid elements which are configured to be associated with an articulated mechanical structure. Each one of the rigid elements is coupled rigidly, at a first end thereof, to a respective end of the elastic element. The elastic element is not associated with any constraint or load between its two ends.

The disclosure relates to a bearing arrangement for a bearing end of a fastening shackle in a vehicle body of a vehicle that includes an outer sleeve, an inner sleeve and a sleeve-shaped plastic sliding bearing. The inner sleeve is mounted in the outer sleeve so that the inner sleeve is able to slide. The sleeve-shaped plastic sliding bearing surrounds the inner sleeve and is connected to the inner sleeve in a rotationally fixed manner. The sleeve-shaped plastic sliding bearing is also longer than the outer sleeve and is delimited by a first sleeve rim that protrudes beyond the outer sleeve, where the first sleeve rim is configurable to be form-locked and to resist rotation.

The disclosure relates to a bearing arrangement for a bearing end of a fastening shackle in a vehicle body of a vehicle that includes an outer sleeve, an inner sleeve and a sleeve-shaped plastic sliding bearing. The inner sleeve is mounted in the outer sleeve so that the inner sleeve is able to slide. The sleeve-shaped plastic sliding bearing surrounds the inner sleeve and is connected to the inner sleeve in a rotationally fixed manner. The sleeve-shaped plastic sliding bearing is also longer than the outer sleeve and is delimited by a first sleeve rim that protrudes beyond the outer sleeve, where the first sleeve rim is configurable to be form-locked and to resist rotation.

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.

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.