A torsion beam type of rear suspension comprising a pair of right-and-left trailing arms and a torsion beam. A floor under cover for airflow straightening is attached to a portion of a vehicle body in front of the rear suspension so as to cover a vehicle-body lower face. A cover-support bracket is laid between a rear portion of a side sill and an inward side, in a vehicle width direction, of an arm pivot of the trail arm. A portion of the floor under cover which is positioned in the vicinity of its rear end is engaged with the cover-support bracket such that a rear end portion of the floor under cover is extended from an inward-side edge of a front portion of a rear wheel house to an inside of the rear wheel house.

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.

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.

Torsion beam axles for vehicles are disclosed. An example torsion beam axle disclosed herein includes a first side assembly, the first side assembly including a longitudinal member and a receiver. The example torsion beam axle further including a second side assembly, and a cross strut extending transversely between the first side assembly and the second side assembly.

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 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.

A trailing arm device (1) of a drivable torsion beam axle (2) is described. The trailing arm device (1) has a housing (5) in which a drive-train (8) can be arranged and is connected to a trailing arm (4). The housing (5), as fitted into position within a vehicle, has a sidewall (11) formed integrally with a central housing region (9) on a side facing toward a wheel. The sidewall delimits a housing interior space (10) that accommodates, at least partially, the drive-train (8). On the side facing away from the wheel, the housing interior space (10) is delimited by at least one cover element (14) that can be detachably connected to the central housing region (9).

A tubular type torsion beam is manufactured by bending and welding and coupling a plate material. The plate material has a plurality of protrusions disposed on a plurality of side surfaces in a width direction of the vehicle. The torsion beam is manufactured by molding the plate material in a pipe shape by bending the plate material in the width direction and molding the plate material to dispose the plurality of protrusions to contact each other to form a gap between the plurality of side surfaces of the plate material and then welding and coupling the plurality of side surfaces of the plate material.

The invention relates to a twist-axle that includes a cross-beam member and two trailing arms, each trailing arm rigidly secured to the cross-beam member in one of two connection regions of the cross-beam member or formed integrally with and extending from one of the two connection regions. The cross-beam member is formed from a tubular blank and has a torsionally elastic central portion and two torsionally stiff connection regions. The cross-beam member has a wall thickness that varies longitudinally along the length of the cross-beam member from the torsionally elastic central portion to each of the torsionally stiff connection regions.

The disclosure relates to a method for producing an axle component for a motor vehicle, in which at least two metallic axle parts are joined integrally to one another. The axle component is a twist beam axle, in which lateral trailing arms are connected to each other via a transverse profile. In order to establish a target geometry of the axle component, the heat induced by a welding operation is utilized. The welding operation can be a specifically positioned weld, an additional weld or a blind weld. The heat of welding is utilized in order to achieve a compensation deformation and to compensate for distortion states and/or to align the axle component.