A work vehicle includes a plurality of traveling devices driven for traveling, a plurality of articulated link mechanisms having a plurality of links pivotally coupled to each other to provide two or more joints and configured to independently support the traveling devices to a vehicle body with allowing lifting/lowering of the traveling devices independently relative to the vehicle body, and a plurality of hydraulic cylinders capable of changing respective postures of the plurality of links included in the articulated link mechanisms. A first link located at a position nearest the vehicle body is supported to be pivotable about a body side coupling portion. A first hydraulic cylinder for operating the first link has its cylinder tube side pivotally coupled to a coupled portion on the side of the vehicle body and has its piston rod side pivotally coupled to a coupled portion on the side of the first link.

A suspension structure of a utility vehicle includes: a shock absorber; and a trailing arm extending in a longitudinal direction of the utility vehicle. A lower end of the shock absorber is supported by a rear end of the trailing arm within a wheel as viewed in a side view of the utility vehicle.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a rear wheel assembly, a front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position. At least one of the wheel assemblies is powered by a selectively engageable drive assembly including a motor, transmission, driveshaft, selectively engageable clutch and hub, to drive the rotation of at least one of the wheels.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a steerable rear wheel assembly, a steerable front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

A suspension assembly for a heavy-duty vehicle axle/suspension system that includes a geometry that enables components of a brake system to be mounted above and be protected by a beam of the suspension assembly. In an embodiment of the suspension assembly, the beam includes a recessed area that allows a brake actuator to be positioned at least partially within or disposed adjacent the recessed area.

A vehicle with a chassis supported by a multiple-lifting-tandems suspension of four, six, eight, ten or twelves lifting tandem pairs, where each lifting tandem pair comprises a front wheel and a rear wheel rotatably mounted to a rocker arm whereas both wheels may or may not be steerable; a link arm having a proximal end rotatably mounted to the chassis and a distal end rotatably mounted to a central portion of the rocker arm; an actuator having a proximal end rotatably mounted to the chassis a distance from the proximal end of the link arm and a distal end rotatably mounted to a central portion of the rocker arm or to a distal end of the link arm, the actuator extending to move the rocker arm to an extended position and retracting to move the rocker arm to a retracted position; and drive means engaging each front wheel and each rear wheel.

An apparatus for pivotally fixing a non-driven wheel assembly to a vehicle frame is disclosed. The apparatus provides a trough through which non-driven wheel assembly components can be passed and protected. In one embodiment, the trough is circular in shape and is fully enclosed by the apparatus. In other embodiments, the trough has various shapes and comprises retaining members to secure and protect non-driven wheel assembly components. A suspension system interface is provided that allows the apparatus to suspend the non-driven wheel assembly. Openings used to pivotally and rigidly fix a mounting plate, suspension system, pivotal axes, and fender assemblies are also disclosed and claimed herein.

An apparatus for pivotally fixing a non-driven wheel assembly to a vehicle frame is disclosed. The apparatus provides a trough through which non-driven wheel assembly components can be passed and protected. In one embodiment, the trough is circular in shape and is fully enclosed by the apparatus. In other embodiments, the trough has various shapes and comprises retaining members to secure and protect non-driven wheel assembly components. A suspension system interface is provided that allows the apparatus to suspend the non-driven wheel assembly. Openings used to pivotally and rigidly fix a mounting plate, suspension system, pivotal axes, and fender assemblies are also disclosed and claimed herein.

A vehicle has a frame, driver and passenger seats, two front and two rear suspension assemblies, two front and two rear wheels, and a motor operatively connected to at least two of the wheels. Each rear suspension assembly has a trailing arm having a front end pivotally connected to the frame, a knuckle pivotally connected to a rear portion of the trailing arm, a link having a laterally outward end pivotally connected to the trailing arm and the knuckle and a laterally inward end pivotally connected to the frame, and a fastener fastening the laterally outward end of the link, the knuckle and the trailing arm together.

A vehicle suspension assembly includes a trailing axle carried by a frame of the assembly. The frame can retract to a retracted state from an extended state and extend from the retracted state to the extended state. The retraction and extension can occur along a longitudinal axis of the frame. An operator can pivotally raise and lower a free end of frame in the retracted or extended state along an arcuate path when the vehicle suspension assembly connects to a vehicle.