A spring carrier of a motor vehicle axle, particularly of a portal axle, with a longitudinal portion (1) and a flange portion (2) which adjoins the one end of the longitudinal portion (1) and which has a flange (8). The longitudinal portion (1) includes at least one fastening point for fastening to a shock absorber and/or to a suspension. At least the longitudinal portion (1) of the spring carrier arm comprises a lower shell (4) and an upper shell (3) of metallic material or of a plastic with or without fiber reinforcement, the shell edges (6, 7) thereof extending along the neutral bending axis (5) of the spring carrier arm, and the lower shell (4) and upper shell (3) are connected to one another along the neutral bending axis (5) of the spring carrier arm by bonding engagement.

An electric resistance welded steel pipe for manufacturing a hollow stabilizer has a Lankford value in a pipe longitudinal direction of from 0.7 to less than 1.0. The electric resistance welded steel pipe is subjected to cold bending and then to a heat treatment including quenching and tempering to manufacture a stabilizer. The cold bending is cold rotary draw bending. When bent with a bend radius of from 1.0 times to 3.0 times an outer diameter of the pipe before cold bending, a flattening ratio is from 0% to 10%, a thickness reduction rate on a bending outside and a thickness increase rate on a bending inside are from 0% to 10%, and additionally, a circumferential length change of a bending center portion is from 0% to 10%. A Vickers hardness of the stabilizer after the heat treatment is adjusted to from 400 HV to less than 580 HV.

A shock absorber according to the present embodiment includes a shock absorber main body having a cylindrical outer shell and a rod movably inserted into the outer shell, and a knuckle bracket attached to an outer periphery of a lower end of the outer shell, in which the knuckle bracket includes a pair of clamping pieces that are curved along an outer periphery of the outer shell and clamp the outer shell, a pair of attachment pieces that extend in a radial direction of the outer shell from the ends in a circumferential direction of the respective clamping pieces and face each other, and a connecting piece that connects ends of the attachment pieces, a width between the tip ends in the circumferential direction of the inner peripheral surfaces of the respective clamping pieces is larger than the outer diameter of the outer shell, and the proximal end side than the tip ends in the circumferential direction of the inner peripheral surfaces of the respective clamping pieces abuts on the outer periphery of the outer shell.

A shock absorber according to the present embodiment includes a shock absorber main body having a cylindrical outer shell and a rod movably inserted into the outer shell, and a knuckle bracket attached to an outer periphery of a lower end of the outer shell, in which the knuckle bracket is formed by bending a single metal plate as a base material and includes a pair of clamping pieces that are curved along the outer periphery of the outer shell and clamp the outer shell, a pair of attachment pieces that extend in a radial direction of the outer shell from ends in a circumferential direction of the respective clamping pieces and face each other, a connecting piece that connects ends of the attachment pieces, and a pair of notches that cut off the three-plane intersection point where the clamping pieces, the attachment pieces, and the connecting piece intersect.

A stabilizer manufacturing method includes forming a first end and a second end of a stabilizer by processing a tubular member such that each of the first end and the second end has a wall thickness equivalent to a wall thickness of a main body of the stabilizer. The first end and the second end constitutes both ends of the stabilizer, and the first end and the second end are formed by sandwiching and pressing the ends of the tubular member by two pairs of pressing members, facing directions of the two pairs of pressing members being different from each other.

A press-formed product includes a main body part having a first end part and a second end part respectively on both ends, and a protruded part that protrudes outward of bending from a bent part of the main body part. On a surface of the top plate part of the main body part, a groove part is provided in a domain on the first end part side from a root of the protruded part. A first vertical wall part extending from the first end part of the main body part to the protruded part has a corner part connecting the main body part and the protruded part. An angle that is formed by a part which is on the main body part side from the corner part and a part which is on the protruded part side from the corner part is an acute angle.

Providing a method of manufacturing a vehicular arm component having a torsional rigidity of a predetermined level or less and a sufficient tensile strength in the entire circumferential direction.

A method of manufacturing a vehicular arm component for manufacturing the vehicular arm component 1 having a hollow shape in open cross-section by subjecting a workpiece W, which is a flat plate, extending in an XY plane formed by an X direction and a Y direction to pressing in stages such that two side surfaces W1, W2 of the workpiece in an XZ plane formed by the X direction and a Z direction face one another across a gap G, the method including a restriking process in which a protrusion 113 disposed on a restriking die 110 to be extended in the X direction is arranged in the gap between the two side surfaces facing one another and the two side surfaces are brought into contact with the protrusion such that the workpiece is pressed from an outer periphery to an inner periphery.

[Object] Damage to a surface of a resin bush caused by press-fitting is prevented even when a configuration for positioning during welding is added.

[Solving Means] A rolled collar (40) is a steel rolled collar into which a resin bush (90) is pressed-fitted, and which is joined to a joining member by welding. The rolled collar includes a main body part (50) formed in a hollow cylindrical shape, and a clinch part that joins both end surfaces of the main body part together by fitting. The rolled collar includes a notch part (70) formed by cutting off a portion of an annular edge (53) in the main body part. Here, a convex jig determining a position of the main body part at a time of welding is fit into the notch part. The rolled collar includes a cavity part (80) formed to be hollow from an inner circumferential surface side on a wall surface around the notch part to form a clearance (81) between the press-fitted resin bush and an edge portion (71) of the notch part on the inner circumferential surface side.

A spring carrier of a motor vehicle axle, particularly of a portal axle, with a longitudinal portion (1) and a flange portion (2) which adjoins the one end of the longitudinal portion (1) and which has a flange (8). The longitudinal portion (1) includes at least one fastening point for fastening to a shock absorber and/or to a suspension. At least the longitudinal portion (1) of the spring carrier arm comprises a lower shell (4) and an upper shell (3) of metallic material or of a plastic with or without fiber reinforcement, the shell edges (6, 7) thereof extending along the neutral bending axis (5) of the spring carrier arm, and the lower shell (4) and upper shell (3) are connected to one another along the neutral bending axis (5) of the spring carrier arm by bonding engagement.

A suspension arm for multi-link suspensions of automotive vehicles, comprising a body formed by a hollow extruded profile the cross-section of which has a closed outer contour formed by side walls and comprising at least one inner partition internally splitting the profile into at least two inner cavities, the extruded profile having the length of the arm to be obtained, according to a longitudinal axis of the arm, where a central section of the arm is machined in at least one side wall having no inner partition extending therefrom without the machining ever reaching an inner partition, and where the side walls having the at least one inner partition extending therefrom comprise an end opening in each end area of the arm, between which the central section is arranged, and a method for making the suspension arm.