A vehicle rear suspension structure includes a torsion beam and a pair of arm units. Each of the arm units includes a trailing arm formed in a tubular shape extending in the vehicle front-rear direction, an end plate occluding a rear side opening of the trailing arm, an upper reinforcing member, and a lower reinforcing member. A shaft insertion hole is formed in an inner side portion of a rear arm of the trailing arm, the upper reinforcing member is joined to the rear arm to fit an upper side edge portion of a peripheral edge portion of the shaft insertion hole, and the lower reinforcing member is joined to the rear arm to fit a lower side edge portion of the peripheral edge portion of the shaft insertion hole.

Embodiments relate to an off-road vehicle comprising a frame, including at least one cargo box support member, a suspension movably coupled to the frame, a passenger compartment, an engine, a transmission operatively coupled to the engine, and a cargo box. The cargo box includes a floor and a plurality of upwardly extending sidewalls, wherein at least a portion of the cargo box floor extends over the at least one cargo box support member and wherein the cargo box is removably coupled to the at least one cargo box support members and is removable from the off-road vehicle via the removal of fewer than eight fasteners.

A compressor for a shock absorber is provided, including a stretching mechanism and a clamping mechanism. The stretching mechanism includes a first main body and a second main body. The first main body is movably connected with the second main body. The clamping mechanism includes a first abutting assembly and a second abutting assembly which are configured to clamp the shock absorber.

A modular chassis is provided for an off-road vehicle to improve assembly, servicing, and repairing of a drivetrain of the off-road vehicle. The modular chassis includes a chassis to support components of the off-road vehicle. A front frame module couples with a front of the chassis, and a rear frame module couples with a rear of the chassis. The front frame module supports lower suspension arms of the off-road vehicle by way of inboard bushing joints. The front frame module supports at least a steering gear and a front differential of the off-road vehicle. The rear frame module is a tube-frame structure that supports components of the off-road vehicle. A lower portion of the rear frame module extends rearward and acutely upward to a top frame member that couples with upper side portions of the chassis. Several cross-members impart structural integrity to the rear frame module.

A shock absorber includes a cylinder and a movable piston rod inserted into the cylinder to be movable to generate a damping force and having one end which extends to the outside of the cylinder. A seal member is fixed to the cylinder to be in sliding contact with the piston rod, and a friction member generates a frictional force with respect to relative movement between the cylinder and the piston rod. The friction member includes first and second friction parts, respectively fixed to one of the cylinder and the piston rod to be in sliding contact with the other of the cylinder and the piston rod. The second friction part is configured to start to slide with respect to relative movement of the cylinder and the piston rod at a timing different from that of the first friction part and generate an adjustable frictional force.

An off-road vehicle includes a frame, a front suspension, and a rear suspension. In some examples of the off-road vehicle, the rear suspension includes trailing arms with are pivotally attached to the frame rearward of an operator area. Further, the frame can include a front subframe assembly and a rear subframe assembly which are easily removable from the main frame of the vehicle to permit access to various components of the off-road vehicle.

An arrangement for securing a vehicle vibration damper on a wheel support and/or on a vehicle body includes a rubber bearing secured by a fastener, the rubber bearing including at least two rubber bushings. When in an installed position, at least one of the rubber bushings is secured in three longitudinal degrees of freedom relative to the wheel support or the vehicle body, and a rotational degree of freedom of the one of the bushings about the axis of the fastener is blocked by a form-fitting arrangement. The form-fitting arrangement formed by engagement of a nose on the one of the bushings into a recess arranged in a rubber bearing receiving area of the wheel support and/or vehicle body. The nose and the recess are shaped such that the form fitting connection is formed only by installing the fastener, without the need for manually rotating the bushing with a tool.

A universal axle-hub assembly is provided for an off-road vehicle. The universal axle-hub assembly comprises a wheel hub that receives a constant velocity (CV) axle snout into an opening extending through an axle support of the wheel hub. An outboard-most portion of the opening is a splined portion that engages with similar splines disposed on an outboard-most portion of the CV axle snout. An inboard-most portion of the opening is a smooth portion that receives a smooth portion of the CV axle snout. The axle support extends through an entirety of the width of a bearing that supports the wheel hub, such that the bearing supports the smooth portion of the CV axle snout and substantially eliminates shear forces acting on the splined portion of the CV axle snout. A bearing carrier supports the bearing and may be fastened onto a trailing arm or a spindle of the off-road vehicle.

The invention relates to a connection system for connecting a damper unit of a vehicle inside a wheel suspension of the vehicle, the connection system having: an upper attachment region for attaching the damping unit, at least part of said region surrounding a receiving area for the damping unit and the receiving area extending around a first axis acting as the damping axis of the damping unit; a lower attachment region for coupling to the wheel-side portion of the wheel suspension, said lower attachment region having, in particular, two mutually spaced lower sections with an attachment area therebetween and an intermediate region which connects the upper attachment region to the lower attachment region. The main extension of the intermediate region corresponds to the direction of the first axis and the intermediate region allows the passage of a drive shaft of the vehicle. The connection system is made of an extruded part, the extrusion direction of which is the direction in which the extruded material extends, said material thus forming the intermediate region of the connection system. The invention also relates to a connection system comprising a clamping mechanism.

An assembly for a wheel suspension includes a vibration damper and an add-on part. The vibration damper includes a contact region on which the add-on part is configured to rest and wherein the contact region is configured to receive a force transmitted thereon. A welding element is mechanically connected to the add-on part and welded to the contact region. The contact region and the welding element include the same material or weldable material partners and the add-on part and the contact region are formed from dissimilar and not mutually weldable materials.