A Retrofittable Air Suspension Brackets assembly comprises an air spring retained between an Upper Air Spring Mount and a Lower Air Spring Bracket. The Upper Air Spring Mount is attached to Upper Frame Brackets that are held in place by two U-Bolts, which also secure the Lower Air Spring Bracket and a Cradle Structure which limits movement of the vehicle frame member.

A releasable alignment clip secures a primary leaf spring to one or more secondary leaf springs of a suspension of a vehicle. The releasable alignment clip prevents separation of the primary leaf spring from the secondary leaf spring during normal operation while permitting relative sliding. The releasable alignment clip has a minimum separation force such that in response to a collision forcing a wheel forwardly, the releasable alignment clip deforms and permits separation of the primary leaf spring from the secondary leaf spring to avoid the primary leaf spring from breaking between the alignment clip and a point of attachment to the vehicle. The releasable alignment clip may have a reduced thickness, notches, or one or more perforations to achieve the minimum separation force.

A vehicle suspension system may include a first suspension assembly operably coupling a first wheel to a chassis of a vehicle, a second suspension assembly operably coupling a second wheel to the chassis where the first and second wheels form a pair of front wheels, a third suspension assembly operably coupling a third wheel to the chassis, a fourth suspension assembly operably coupling a fourth wheel to the chassis where the third and fourth wheels forming a first pair of rear wheels, and a payload extension kit that is attachable to the chassis non-permanently. The payload extension kit may include a fifth suspension assembly operably coupling a fifth wheel to a sub-frame extension of the payload extension kit, and a sixth suspension assembly operably coupling a sixth wheel to the sub-frame extension, where the fifth and sixth wheels form a second pair of rear wheels.

An overload suspension system configured for operative engagement to a vehicle having a first leaf spring and second leaf spring to provide auxiliary support to the vehicle when overloaded. A first control arm attached to a first torsion bar has a distal end positioned a separation distance from the first leaf spring. A second control arm attached to the second control arm has a distal end positioned substantially the same separation distance from the second leaf spring. The suspension system operates as an auxiliary suspension only when added weight to the vehicle deflects both leaf springs to contact a respective one of the control arms, thereby preserving the ride and suspension characteristics of the vehicle when the added weight is not present.

A spring hanger assembly may be formed pieces shaped to increase the stiffness and strength. The spring hanger assembly may comprise separate pieces, such as an inner section and an outer section. The spring hanger assembly may be attached to a frame using fasteners or hucks.

A tandem mechanical spring axle/suspension system for heavy-duty vehicles includes a tandem assembly that comprises a front beam of a suspension assembly of a front axle/suspension system, a rear beam of a suspension assembly of a rear axle suspension system, and a mechanical spring. The mechanical spring operatively engages the front beam and the rear beam and extends longitudinally therebetween, as well as operatively engages a main member of the vehicle frame.

The suspension device according to the present invention is provided with a leaf spring extending in a belt shape, a first arm, a second arm, and a coupling member for rotatably coupling the first arm and the second arm, wherein: a first holding part for holding one end of the leaf spring and a second holding part for holding the other end of the leaf spring are provided; and the first and second arms each support the leaf spring by at least one portion that is different from the one end or the other end of the leaf spring.

A spring assembly for a vehicle bogie suspension arrangement. The spring assembly includes a set of washers moulded into an elastomer body. The spring assembly has an axial extension in an axial direction and the washers are arranged relative to each other in the axial direction. At least one of the washers is a spring washer including a spring washer body and at least two spring tongues. Each spring tongue has a spring base connected to the spring washer body and a spring tip distal to the spring base. At least a portion of the spring tongue is located at a non-zero distance from the spring base in the axial direction.

The present invention relates to a coil spring support for a vehicular suspension system, which comprises a base plate and a support column protruding from the base plate, wherein a coil spring is coupled to the support column in such a manner that the lower end of the coil spring is fitted in and coupled to a coupling groove, which is formed on the outer peripheral surface of the support column and at a position having a predetermined height from the base plate, so that the coil spring support can be auxiliarily installed on a plate spring of a vehicle so as to compensate and improve a shock absorbing capability of the existing vehicle.

The suspension device according to the present invention is provided with a leaf spring extending in a belt shape, a first arm, a second arm, and a coupling member for rotatably coupling the first arm and the second arm, wherein: a first holding part for holding one end of the leaf spring and a second holding part for holding the other end of the leaf spring are provided; and the first and second arms each support the leaf spring by at least one portion that is different from the one end or the other end of the leaf spring.