The twist axle assembly includes a cross beam that extends along a length between opposite ends, and a pair of trailing arms are fixedly attached with the opposite ends. A spindle plate is fixedly attached with each of the trailing arms. For each spindle plate and trailing arm combination, the spindle plate and trailing arm are provided with cooperating orbital adjustment features which allow an orientation of the spindle plate relative to the trailing arm to be adjusted prior to the spindle plate being fixedly attached with the trailing arm for allowing preselection of a camber angle, a caster angle, and a toe angle for a wheel to be coupled with the spindle plate.

An axle for a vehicle, wherein the axle includes a transverse axle portion having a longitudinal end. The axle including a first axle portion connecting the transverse portion to a chassis of the vehicle and a second axle portion connecting the transverse portion to a wheel carrier for supporting a vehicle wheel. A vibration damper is arranged in a receiver in one of the axle portions.

A bush may include: a second inner pipe forming a central protrusion in a central section of the second inner pipe; and an outer pipe forming a third protrusion at a first inner side and a fourth protrusion at a second inner side. In particular, the third and fourth protrusions are arranged outside of the central protrusion.

A motor vehicle rear suspension includes left and right trailing links mounted, at respective forward ends thereof, to a vehicle body for pivoting movement about a transversely-extending axis. The trailing links extend rearward from the axis, and each has a wheel carrier attached thereto adjacent a rear end thereof. Left and right leaf springs are fixed, at respective forward ends thereof, to the vehicle body and extend rearward therefrom alongside and generally parallel with their respective trailing links. Rear ends of the leaf springs contact their respective trailing links and applying spring-force thereto.

The thickness of one of a pair of panels (an inner panel (20) and an outer panel (30)) of each trailing arm (12) is greater than the thickness of the other panel, and a rear wheel support unit (an axle unit (51)) configured to support each rear wheel is coupled to one of the pair of panels (the inner panel (20) and the outer panel (30)).

This torsion beam manufacturing method is a method for manufacturing a torsion beam which is provided with a uniformly shaped closed cross-sectional portion in which a cross section orthogonal to a longitudinal direction is a closed cross section having a substantial V-shape or a substantial U-shape with a pair of ear portions, and a shape changing portion which leads to the uniformly shaped closed cross-sectional portion and in which a shape of the closed cross section changes progressively away from the uniformly shaped closed cross-sectional portion, the torsion beam manufacturing method comprising: thickening to form a pair of thickened portions in at least the shape changing portion by pressurizing each of the pair of ear portions from outside against swelling of the pair of ear portions in a slate where both outer surfaces of each of the pair of ear portions are supported.

A coupled torsion beam axle apparatus of a vehicle includes: a left torsion bar and a right torsion bar arranged in an internal space of the torsion beam so to be separated from each other in a horizontal direction of a torsion beam. Torsion stiffness of the torsion beam is tuned by replacing the left torsion bar and the right torsion bar, and particularly, warping stiffness is tuned by changing a position where the left torsion bar is coupled to the torsion beam and a position where the right torsion bar is coupled to the torsion beam.

A wheel steering system includes: a rear suspension mechanism inclusive of a knuckle member for rotatably holding a right rear wheel; a first cam and a second cam that are rotatably supported; a first cam follower 18 that follows the first cam; a second cam follower 20 that follows the second cam 16; cam grooves 48 respectively provided in the first and second cams; a first engaging pin and a second engaging pin that engage with the respective cam grooves; and a rotational driving force transmitter that transmits a rotational driving force of an electric motor to the first and second cams, wherein the first cam and the first cam follower are arranged on a front side in the vehicle front-rear direction of an axle, and the second cam and the second cam follower are arranged on a rear side in the vehicle front-rear direction of the axle.

A removable spindle assembly improvement comprised of a spindle housing end unit having a threaded cavity. A corresponding threaded removable spindle is torqued into the threaded cavity. The spindle has a tapered section that includes O-rings for creating a seal along the corresponding section of the cavity to prevent corrosion which assists in the elimination of spindle seizure within the spindle housing end unit's cavity. The spindle housing end unit's housing includes at least two threaded apertures that cooperate with sealed set screws for securing the spindle in place during operation. The set screws are placed apart at an odd number of 15 degree increments. This assembly facilitates easy removal and replacement of a spindle on a spring axle.

A torsion beam of a vehicle torsion beam suspension has a closed cross section. A beam center portion has an inverse substantially v-shaped cross section or a substantially v-shaped cross section. Circumference increasing portions having a longer circumferential length toward the beam ends are disposed at opposite sides of the beam center portion. Each circumference increasing portion has a beam width that is a width in the fore and aft direction of a vehicle body, the beam width gradually increasing toward a beam end, and increasing at a higher rate as a position of the beam width is closer to the beam end.