A suspension assembly for a commercial vehicle includes a first linkage, an air spring, a carriage, and a second linkage. The first linkage is pivotally coupled at a first end with a structural member of a frame. The structural member extends downwards from the frame. The air spring is coupled with the frame and a second end of the first linkage. The air spring drives the first linkage to pivot about the first end relative to the structural member. The carriage is pivotally coupled with the first linkage at a position between the first end and the second end of the first linkage. The second linkage is pivotally coupled at a first end with the structural member, and pivotally coupled with the carriage at a second end. The structural member, the first linkage, the second linkage, and the carriage define a four-bar linkage.

A coupled torsion beam axle for vehicles may include a torsion beam disposed in a vehicle width direction and trailing arms disposed at both ends of the torsion beam in a length direction of a vehicle body, wherein the torsion beam has an opened cross section formed in a reverse U shape by press-forming one sheet member machined so that lengths of right and left sides are different from each other on the basis of a center, and cross section widths which are different from each other along vehicle width directions of both sides on the basis of the center between the trailing arms of both sides, and front and rear surfaces formed in a wave shape along the vehicle width directions of both sides on the basis of the center.

A trailing arm bush may include a cylindrical outer pipe, an inner pipe inserted to a central portion of the outer pipe at an interval, a first bush rubber unit, a second bush rubber unit and a third bush rubber unit that connect between an inner peripheral surface of the outer pipe and an outer peripheral surface of the inner pipe, respectively, a hollow void part formed between the inner peripheral surface of the outer pipe and the outer peripheral surface of the inner pipe, and a stopper attached to the inner peripheral surface of the outer pipe and disposed among the first bush rubber unit, the second bush rubber unit and the third bush rubber unit.

A torsion beam which is used in a suspension system of an automobile which is provided with a pair of arm members which extend in a front-rear direction of the automobile and are designed to be connected to a chassis of the automobile so as to be able to swing and to have wheels attached rotably to them is disclosed. The torsion beam is formed with a recess which extends in the longitudinal direction whereby that torsion beam has first and second leg parts in a plane vertical to the longitudinal direction and exhibits a substantially V-shaped or substantially U-shaped cross-sectional shape. The torsion beam is provided with connection parts which are provided at the two ends of that torsion beam and are connected to the arm members, a fixed shape part which is provided at a center part in the longitudinal direction of that torsion beam, and asymmetric shape parts which are provided between that fixed shape part and the connection parts. At the asymmetric shape parts, the depth of the recess becomes gradually deeper from the connection parts toward the fixed shape part and the first leg part has a larger width dimension than the width dimension of the second leg part.

A twist beam axle has two side arms and a torsion profile. The torsion profile is connected to a side arm by a weld seam in each case. At least in the area of the welded connection, the torsion profile has a wall having a wall thickness that is greater than the wall thickness of a wall of a side arm. The torsion profile has a joining surface at each end section and the side arms each have a joining surface, wherein the torsion profile and the side arms are each connected at mutually facing joining surfaces by a weld seam. The joining surface at the end section of the torsion profile has a bevel. The joining gap formed between the mutually facing joining surfaces of the end section and the side arm is configured as V-shaped.

A twist beam axle has two side arms and a twist profile. The twist profile is joined to a side arm by a weld. At least in the area of the welded joint, the twist profile has a wall with a wall thickness that is greater than the wall thickness of a wall of one side arm. The twist profile has a joining surface at each end section and the side arms each have a joining surface, wherein the twist profile and the side arms are each joined at mutually facing joining surfaces by a weld. The joining surface on the end section of the twist profile has a bevel manufactured without cutting. The joining gap formed between the mutually facing joining surfaces of the end section and the side arm is configured in a V-shape.

A motor vehicle component has two component parts made of steel with different wall thicknesses, which are arranged at an angle to one another and are connected by a weld seam. A joining surface at the end portion of the first component part has a bevel produced without cutting. In order to form the bevel, an end portion of an initial blank is formed without cutting. The end portion is then trimmed at the end and an abutment surface is created on the front side of the end portion. The two component parts are positioned relative to each other so that the joining surface of the first component part and the joining surface of the second component part face each other. The material-locking joining of the first component part and the second component part is achieved by a weld seam on the joining surfaces.

A suspension for a vehicle includes an arm including an arm body, a transverse leaf spring including a fixed leaf end and a free leaf end, and a link connecting the arm and the transverse leaf spring. The link includes a first link end connected to the arm body and configured to rotate relative to the arm body, where a rotation center of the first link end is located at the arm body, a second link end connected to the free leaf end and configured to rotate relative to the arm, and a link body that extends between the first link end and the second link end, the link body being spaced apart from the arm body.

A suspension for a vehicle includes an arm including an arm body, a transverse leaf spring including a fixed leaf end and a free leaf end, and a link connecting the arm and the transverse leaf spring. The link includes a first link end connected to the arm body and configured to rotate relative to the arm body, where a rotation center of the first link end is located at the arm body, a second link end connected to the free leaf end and configured to rotate relative to the arm, and a link body that extends between the first link end and the second link end, the link body being spaced apart from the arm body.

A vehicle includes an axle with an apparatus that includes a first cylinder, a bearing and a second cylinder positioned around the first cylinder and coaxial with the first cylinder. The bearing is positioned between the first and second cylinders, and the first and second cylinders rotate relatively about an axis and are fixed in a direction of the axis.