An embodiment component integration type rear lower includes a body frame having an end portion of a first side and an end portion of a second side and having a predetermined length, a front-rear connection member connecting a side sill at the end portion of the first side and connecting a rear side member at the end portion of the second side, a bush mounting member coupling a bush to the end portion of the first side, and a coupled torsion beam axle (CTBA) mounting member coupled to at least one of a CTBA, a chassis spring, or a shock absorber, the at least one of the CTBA, the chassis spring, or the shock absorber being engaged with the end portion of the second side.

An embodiment component integration type rear lower includes a body frame having an end portion of a first side and an end portion of a second side and having a predetermined length, a front-rear connection member connecting a side sill at the end portion of the first side and connecting a rear side member at the end portion of the second side, a bush mounting member coupling a bush to the end portion of the first side, and a coupled torsion beam axle (CTBA) mounting member coupled to at least one of a CTBA, a chassis spring, or a shock absorber, the at least one of the CTBA, the chassis spring, or the shock absorber being engaged with the end portion of the second side.

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)).

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)).

A twist axle assembly (20) of a vehicle includes a pair of trailing arms (22) and a twist beam (24) having a base portion (46) extending along an axis (A) between first and second twist beam ends (42, 44). The twist beam (24) includes a pair of side walls (48) extending downwardly from the base portion (46) and each disposed in spaced relationship with the trailing arms (22). At least one mounting bracket (54) extends from a first mounting bracket end (56) disposed in abutting relationship with a respective trailing arm (22) to a second mounting bracket end (58) disposed in overlaying relationship the side walls (48) of the twist beam (24) for allowing the mounting bracket to axially slip or slide along the side walls (48) of the twist beam (24) and provide for lateral or axial adjustment of the twist axle assembly (20) during the manufacturing process.

A hub carrier includes a front arm part extending toward an inner side of a vehicle on a front side of an axle of a rear wheel; and a rear arm part extending on a rear side of the axle of the rear wheel. The rear arm part is joined to a lateral beam on the rear side of the axle of the rear wheel. A vehicle rear end portion of a trailing arm, extending in a vehicle front-rear direction, is joined to the lateral beam. A vehicle front end portion of the trailing arm is joined to a vehicle body using a first bush. A front arm part is joined to a front arm attachment part disposed on the trailing arm using a second bush. First and second support shafts of the first and second bushes have respectively axial directions oriented differently from each other.

The present invention is a torsion beam suspension 100 including an upper member 10 and a lower member 20, and including right and left trailing arms 50 configured to include a pair of trailing arm configuration members 11 and the pair of lower members and configured to extend in a longitudinal direction of a vehicle body and to be swingable in a vertical direction and a torsion beam 16 which is disposed between the right and left trailing arm configuration members of the upper member 10. The lower member includes an upper connection 21 and a beam joint portion 22 inclined from the upper connection 21 to a bottom portion of the U-shaped cross section of the torsion beam and joined with the torsion beam.

There is provided a torsion beam joint structure in a torsion beam suspension including a torsion beam and right and left trailing arms connected to end portions of the torsion beam. The torsion beam has front and rear wall portions, an upper wall portion, and an opening provided at a lower side in an upper-lower direction of the vehicle. The front wall portion and the rear wall portion have a set of joint portions on their right side and left side in the vehicle width direction, by which the front wall portion and the rear wall portion are joined to each of the trailing arms. The set of joint portions includes an outer joint portion located on an outer side at a lowermost position, and an inner joint portion located on an inner side at an uppermost position. The inner joint portion is located higher than the outer joint portion.

A twist axle assembly (20) of a vehicle includes a pair of trailing arms (22) and a twist beam (24) having a base portion (46) extending along an axis (A) between first and second twist beam ends (42, 44). The twist beam (24) includes a pair of side walls (48) extending downwardly from the base portion (46) and each disposed in spaced relationship with the trailing arms (22). At least one mounting bracket (54) extends from a first mounting bracket end (56) disposed in abutting relationship with a respective trailing arm (22) to a second mounting bracket end (58) disposed in overlaying relationship the side walls (48) of the twist beam (24) for allowing the mounting bracket to axially slip or slide along the side walls (48) of the twist beam (24) and provide for lateral or axial adjustment of the twist axle assembly (20) during the manufacturing process.

A torsion beam suspension capable of preventing a rapid change in rigidity at a connection portion between a trailing arm and a torsion beam is provided.

The present invention is a torsion beam suspension 100 including an upper member 10 and a lower member 20, and including right and left trailing arms 50 configured to include a pair of trailing arm configuration members 11 and the pair of lower members and configured to extend in a longitudinal, direction of a vehicle body and to be swingable in a vertical direction and a torsion beam 16 which is disposed between the right and left trailing arm configuration members the upper member 10. The lower member includes an upper connection 21 and a beam joint portion 22 inclined from the upper connection 21 to a bottom portion of the U-shaped cross section of the torsion beam and joined with the torsion beam.