TIE LINKS

Description

[0001] The invention relates to a support arm according to the features in the preamble of claim 1 or 2.

[0002] Suspension control arms are part of a vehicle's wheel suspension and absorb dynamic driving forces. The bearings dampen these absorbed forces and increase ride comfort. Suspension control arms perform both wheel-guiding functions and the transmission of spring, damping, and stabilization forces.

[0003] Depending on their function, a distinction is made between guide arms, suspension arms, and auxiliary arms. Guide arms guide the wheel without supporting the vehicle's weight. Mainly axial forces are introduced at the joints of the guide arms. Suspension arms absorb radial forces such as braking and drive forces. In addition, they support the vehicle's weight together with other chassis components. Suspension arms have additional force introduction points for spring and damper forces. Auxiliary arms are responsible for connecting the guide arms and suspension arms to each other or, in special axle designs, to the wheel carrier.

[0004] Suspension control arms are also differentiated by the number of their connection points. The simplest design is the two-point control arm. This type of control arm has one ball joint and one rubber bearing, or two rubber or hydraulic bearings. Control arms with ball joints are always used to connect the wheel carrier to the body on the front axle. These allow the necessary freedom of movement for steering the wheel.

[0005] According to DE 10 2010 010 665 B4, a chassis control arm is considered state-of-the-art. It features an elongated control arm body made of sheet metal. The control arm body has a bearing mount at each of its two longitudinal ends.

[0006] DE 10 2008 015 393 C5 describes a chassis control arm and a method for its production. The chassis control arm is formed from a one-piece sheet metal shell and has a U-shaped cross-section. The sheet metal shell is formed as a molded part of two partial shells and a back connecting the partial shells.

[0007] WO 2015 / 003769 A1 also discloses a chassis control arm comprising an elongated control arm body made of a one-piece sheet metal, which is bent and has two spaced-apart, opposing side walls. The side walls are connected to each other at least in sections along their free longitudinal sides. The control arm body has a bearing mount at each of its axial ends.

[0008] DE 10 2012 018 553 A1 discloses a chassis control arm with a wheel-side joint and a body-side joint, as well as a control arm body extending between the joints. The control arm body is made of a fiber-reinforced plastic.

[0009] A control arm with a shell-type control arm body is considered state of the art according to WO 2020 / 010199 A1. A ball joint shell is arranged at a first end of the control arm body. The control arm body is made of sheet metal and has a hollow chamber section. The ball joint shell is a forged or cast metal part and has a fastening extension. The ball joint shell engages the hollow chamber section with the fastening extension and is joined to the control arm body.

[0010] DE 11 2010 001 366 T5 describes a wheel suspension arm or a wheel suspension strut for a motor vehicle.

[0011] Furthermore, a control arm for a wheel suspension of a motor vehicle is disclosed in DE 10 2014 226 536 A1.

[0012] DE 10 2014 117 207 A1 describes an axle guide for attachment to an axle tube of a commercial vehicle.

[0013] US Pat. No. 8,690,176 B2 discloses a wheel suspension component in the form of a chassis control arm. This comprises a control arm body formed from two metal sheets. A ball joint assembly is provided at one longitudinal end of the control arm body, and a pivot pin is provided at the other end. A bushing sleeve is secured to an extension of the control arm body.

[0014] CN 203 460 639 U discloses a support link according to the respective preambles of claims 1 and 2, wherein the support link comprises a link body that is leaf-shaped and L-shaped. The link body is formed by a sheet metal shell with a folded edge on the circumference. A reinforcement plate is accommodated between the two, which is adapted to the shape of the link body and is L-shaped.

[0015] A support arm with a ball joint shell, which is a forged or cast part and has a fastening extension that engages in a hollow chamber section of the control arm body, is disclosed in KR 1998 0037783 U.

[0016] Furthermore, JP 2002 337525 A also discloses a chassis control arm.

[0017] The present invention relates to a control arm. As already explained, control arms have the function of supporting the torques generated during braking or acceleration and absorbing the forces acting from a spring / damper element. Therefore, very high demands are placed on the rigidity of a control arm, particularly in its vertical direction. Therefore, control arms are usually manufactured from steel or aluminum using a forging or casting process. The wheel-side joint establishes the connection between the suspension control arm and the wheel carrier via a ball joint. The ball joint is attached to a wheel carrier. The opposite bearing, usually a rubber bearing or a sleeve bearing, is attached to an axle carrier. An additional connection point in the center of the control arm body serves to accommodate a spring or damper element. Disadvantages are the high production costs and weight associated with this process.

[0018] Based on the prior art, the invention is based on the object of creating a support arm which is improved in terms of component weight and advantageous in terms of manufacturing technology and which reliably meets the load requirements, in particular the high rigidity requirements.

[0019] To solve this problem, the invention shows two independent solutions in claims 1 and 2, the technological connection of which consists in the integration of a ball joint holder into the support arm.

[0020] Advantageous embodiments and further developments of the support arm according to the invention are the subject of the dependent claims.

[0021] The support arm has an elongated control arm body. A ball joint socket is arranged at one end of the control arm body. The control arm body is made of sheet metal and has a hollow chamber section. The ball joint socket is a forged or cast metal part, particularly steel or aluminum. The ball joint socket has a fastening extension. The fastening extension is formed integrally with the ball joint socket and made of the same material. The ball joint socket engages with the fastening extension in the hollow chamber section of the control arm body and is joined to the control arm body.

[0022] A key aspect of the invention is that the ball joint shell is forged or cast from metal with a one-piece, integrally formed or molded fastening extension. The connection to the handlebar body is made via the fastening extension. The handlebar body is made of sheet metal from shell segments or sheet metal shells. Weldable steels are preferably used here. Shell segments form the handlebar body as components. Shell segments are understood to mean, in particular, sheet metal shells. These are produced in particular by tensile and compressive forming of a sheet metal blank. The handlebar body is composed of two sheet metal shells. These are joined, in particular welded, to one another at least in regions along their contact surfaces. The handlebar body can also be formed from a sheet metal blank using forming or folding techniques.The handlebar body is then rectangular in cross-section and features two spaced-apart, parallel side walls connected by a web. The side opposite the web can be closed by a flange section, also manufactured in one piece using folding technology. It is also possible to connect the side opposite the web with tabs.

[0023] The handlebar body is made of a steel material and has the following mechanical properties: Yield strength Rp0.2: 480 - 880 MPa Tensile strength R m : 580 - 1,050 MPa Elongation at break min. A 80mm : >8%

[0024] The ball joint shell is made of a steel material and is designed as a forged or cast part and has the following mechanical properties: Yield strength Rp0.2: 400 - 600 MPa Tensile strength R m : 600 - 820 MPa Elongation at break min. A5: >14%

[0025] Tensile tests for metallic materials to determine their mechanical properties are standardized in ISO 6892.

[0026] The sheet metal blank(s) forming the handlebar body are cut to fit the final contour of the handlebar body and, if necessary, pre-formed, in particular provided with indentations, adjustments, bearing openings or beads and / or ribbing.

[0027] The shell segments or sheet metal shells have a wall thickness between 2.0 mm and 4.5 mm. The attachment extension has a width between 20 mm and 40 mm. The ball joint shell has a largest outer diameter between 35 mm and 60 mm.

[0028] The handlebar body has a height and a width in vertical cross-section, with the height being greater than the width. The height is in particular twice as large as or greater than the width. The ratio of height to width is preferably greater than 2:1 and in particular lies in the range between 3:1 and 5:1.

[0029] The control arm body is formed by shell segments or two sheet metal shells, with the front hollow chamber section facing the ball joint shell. The control arm body can have additional hollow chamber sections in the longitudinal direction. The control arm body has a rectangular vertical cross-section, with one longer side of the rectangle aligned vertically relative to the installation position of the suspension control arm. This meets the high rigidity requirements in the vertical direction of the vehicle.

[0030] The cross-sectional geometry of the handlebar body can be adjusted according to stiffness requirements. It is also possible to vary the stiffness locally, particularly by varying the cross-sectional geometry.

[0031] The side walls of the hollow chamber section and the lateral sections of the attachment extension contact each other. The attachment extension can be designed to locally support the side walls of the hollow chamber section or the shell segments. For this purpose, support flanks can be formed on the attachment extension, which are in contact with support sections provided on the handlebar body.

[0032] The handlebar body has a rectangular configuration in its vertical cross-section in some areas. A rectangular cross-section configuration is provided, particularly in the hollow chamber section.

[0033] Furthermore, the handlebar body can be configured in a double-T shape in some areas in its vertical cross-section. Such a double-T configuration can be formed particularly in the central longitudinal section of the handlebar body. In this case, adjacent longitudinal walls of the shell segments forming the handlebar body contact each other and form a vertical web. Hollow chamber sections run longitudinally above and below the vertical web.

[0034] The support arm has a ball joint socket at its first longitudinal end. A bearing receptacle is provided at its second longitudinal end, opposite the first longitudinal end. This bearing receptacle is formed by bearing openings located in parallel sidewall sections in the area of ​​the second bearing end.

[0035] The ball joint socket at the first longitudinal end forms a first connection point. The bearing receptacle at the second longitudinal end is a second connection point. Furthermore, the support arm has another connection point for a spring / damper element. This third connection point is an additional force introduction point for spring and damper forces that act vertically and are greater than the horizontal forces. The joint integrated there is therefore also called a ball joint. The third connection point for the spring / damper element can be formed in the control arm body. The bearing receptacle of the third connection point is formed by bearing openings in the side walls of the control arm body or the sheet metal shells forming the control arm body. In a variant according to the invention, each bearing opening has a circumferential collar directed into the interior of the control arm body. The collars of the two bearing openings contact each other and form a bearing ring.

[0036] The support link according to the invention provides that the connection point for the spring / damper element is formed in the hollow chamber section and in the attachment extension. The hollow chamber section has two spaced-apart, opposite side walls, with a bearing opening provided in each side wall. The attachment extension also has a bearing opening. The bearing openings in the side walls and the bearing opening in the attachment extension are arranged coaxially to one another, thus sharing a common axis.

[0037] The control arm body can have at least one bead oriented in its longitudinal direction. Preferably, a bead is formed in each shell segment approximately above the central longitudinal section. Accordingly, the control arm body has a bead along each of its longitudinal sides. The shape, arrangement, and design of the bead or multiple bead(s) can influence the stiffness and force absorption capacity of the suspension control arm.

[0038] Furthermore, the control arm body can have at least one predetermined bending point. The predetermined bending point is preferably provided near the axle carrier connection, i.e., in the area in front of the second longitudinal end.

[0039] A predetermined bending point can be designed as a bead running in the z-direction (vertical direction) and extending across the entire height of the control arm body. The predetermined bending point is intended to ensure that the suspension control arm or its control arm body specifically bends when a predetermined force level is exceeded on the wheel in the transverse direction of the vehicle. The support arm is also designed to collapse in a so-called small overlap crash with a force acting on the wheel in the longitudinal direction of the vehicle.

[0040] With a bead running in the z-direction and extending across the entire height of the control arm body, the control arm body has a curved contour in this area. A predetermined bending point can alternatively and / or additionally be created by locally tapering the control arm body or by recesses in the control arm body, as well as by reducing the wall thickness of the control arm body in certain areas. A wall thickness reduction can be achieved, for example, by reducing the sheet thickness in at least one shell segment.

[0041] The ball joint shell, with its one-piece mounting extension made of the same material, and the control arm body are joined together. This can be achieved by a material fit, particularly by welding. Alternatively and / or additionally, the ball joint shell and the control arm body can also be joined together with a form-fitting connection. A form-fitting connection is particularly achieved by a riveted joint, i.e., using riveting technology.

[0042] According to the invention, a support arm is provided. It has a ball joint socket on the wheel side. On the body side, at the second longitudinal end opposite the first longitudinal end, the support arm has a bearing mount, in particular a bearing mount for a rubber mount. The support arm furthermore has an additional force introduction point for spring and damper forces. This third connection point for a spring / damper element is advantageously integrated into the support arm. The support arm transmits spring, damping, and stabilization forces in accordance with the load and meets the highest strength and rigidity requirements. Synergistic effects are achieved by combining the ball joint socket, in the form of a forged or cast metal part, with the sheet metal control arm body. The control arm body made of sheet metal, particularly in the shell construction made of shell segments, allows for significant weight savings.The production of the support arm according to the invention is efficient and advantageous.

[0043] The invention is described in more detail below with reference to exemplary embodiments illustrated in the drawings. In the drawings: Figure 1 shows a first embodiment of a support arm according to the invention in a perspective view; Figure 2 shows the support arm in a different perspective; Figure 3 shows the components of the support arm in an exploded view; Figure 4 shows the support arm in a plan view and in relation to the installation position in a vehicle without a rear shell segment; Figure 5 shows the plan view of the support arm with the rear shell segment; Figure 6 shows a vertical cross section through the support arm of the Figure 5 along the line AA; Figure 7 a vertical cross section through the support arm of the Figure 5along the line BB; Figure 8 shows, in an exploded view, the components of a first example of a support arm not according to the invention; Figure 9 shows a side view of the support arm and related to the installation position in a vehicle without a rear shell segment; Figure 10 shows the representation corresponding to the Figure 9 in a plan view; Figure 11 shows a second embodiment of a support arm according to the invention with an exploded view of its components; Figure 12 shows a side view of the support arm of the Figure 11 and related to the installation position in a vehicle without the rear shell segment; Figure 13 the representation of the support arm according to the Figure 12 in a plan view; Figure 14 a third embodiment of a support arm in a side view and related to the installation position in a vehicle without the representation of the rear shell segment and Figure 15 the representation of the support arm according to the Figure 14 in a top view.

[0044] Based on the Figures 1 - 7 A first embodiment of a support arm 1 according to the invention is explained. Figures 8 to 10 show a first example of a support arm 2 not according to the invention. Figures 11 to 13 illustrate a second embodiment of a support arm 3. The Figures 14 and 15 illustrate a third embodiment of a support arm 4.

[0045] Each support arm 1 - 4 has an elongated link body 5 with a first longitudinal end 6 and a second longitudinal end 7. A ball joint shell 8 is arranged at the first longitudinal end 6.

[0046] The ball joint shell 8 is a forged or cast metal part, in particular made of steel or aluminum or an aluminum alloy. A fastening extension 9 is integrally formed on the ball joint shell 8, made of the same material.

[0047] The link body 5 is made of sheet metal and has a hollow chamber section 10 at its first longitudinal end 6. The link body 5 is composed of two shell segments in the form of sheet metal shells 11, 12. The sheet metal shells 11, 12 contact one another at joining surfaces and are joined, in particular welded, there. The sheet metal shells 11, 12 are butt-joined at their joining surfaces, resulting in a continuous outer surface along the joining surfaces. The assembled sheet metal shells 11, 12 form the hollow chamber section 10 at their first longitudinal end facing the ball joint shell 8. The ball joint shell 8 engages with the fastening extension 9 into the hollow chamber section 10 and is joined to the link body 5.

[0048] In the Figures 4 , 9 , 10 , 12 , 13 , 14 and 15 the rear sheet metal shell 11 is hidden in the installation position of the respective support arm 1 - 4.

[0049] In the support link 1, the ball joint shell 8 and the link body 5 are joined by a form-fitting rivet connection 13. For this purpose, rivets are placed in the area of ​​the hollow chamber section 10 through the link body 5 and the attachment extension 9 of the ball joint shell 8. Matching through-holes for rivets are provided in the sheet metal shells 11, 12 and the attachment extension 9.

[0050] The connection between the ball joint shell 8 and the support arm 2 is also made by riveting. The openings provided for the rivet connection 13 are in the Figure 8 to recognize.

[0051] For the support links 3 and 4, a material-to-material joint is provided between the ball joint shell 8 and the link body 5. For this purpose, the link body 5 and the ball joint shell 8 are welded together. In particular, the material-to-material connection is made at the joining surfaces between the hollow chamber section 10 and the fastening extension 9.

[0052] Each link body 5 of the support links 1 - 4 has a height h and a width b in vertical cross-section. The height h is larger than the width b, see in particular the illustration of the Figures 6 and 7 .

[0053] The control arm body 5 has a substantially rectangular outer cross-sectional contour, with a longer side of the rectangle corresponding to the height h. This is arranged in the vertical direction of the vehicle relative to the installation position of a support arm 1-4. The control arm body 5 has a correspondingly high section modulus.

[0054] The handlebar body 5 is configured rectangularly, particularly in the hollow chamber section 10 ( Figure 6 ). In the middle length section, the handlebar body 5 is partially double-T-shaped in vertical cross-section ( Figure 7 ) configured.

[0055] Each sheet metal shell 11, 12 has a bead 14 extending in the longitudinal direction of the handlebar body 5. The side walls 15, 16 of the sheet metal shells 11, 12, which run parallel to one another in the region of the bead 14, contact one another and form a vertical web 17. Above and below the vertical web 17, the side walls 15, 16 or the sheet metal shells 11, 12 form hollow chamber sections 18, 19, which extend in the longitudinal direction of the handlebar body 5 from the first longitudinal end 6 to the second longitudinal end 7.

[0056] A bearing mount 20 is provided at the second longitudinal end 7 of the control arm body 5. The bearing mount 20 is formed by bearing openings 21, 22 in the spaced-apart, parallel side walls 15, 16 in the second longitudinal end 7. Each bearing opening 21, 22 has a circumferential rim 23 directed inward toward the interior of the control arm body 5. The bearing mount 20 forms a second connection point for a body-side joint. A rubber bearing is typically installed in the bearing mount 20.

[0057] The control arms 1-4 have a third connection point in the form of a ball joint mount 24. A spring / damper element is connected there. A ball joint installed in the ball joint mount 24 forms a force introduction point for spring and damper forces that act vertically and are greater than the horizontal forces.

[0058] In the support arm 1, the ball joint receptacle 24 is formed by bearing openings 25, 26, 27 arranged coaxially to one another. The hollow chamber section 10 has a bearing opening 25, 26 in each of the two spaced-apart, opposite side walls 15, 16. Furthermore, a bearing opening 27 is formed in the fastening extension 9. The bearing openings 25, 26 in the side walls 15, 16 and the bearing opening 27 in the fastening extension 9 are congruent or coaxial with one another and form the ball joint receptacle 24. This configuration is particularly advantageous when the distance between the ball joint or the ball joint shell 8 and a spring / damper element is small, since particularly high forces act in this case and high rigidity is necessary. The high load-bearing capacity is achieved in particular by the fact that the bearing opening 27 in the fastening extension 9 is designed from solid material.

[0059] The ball joint receptacle 24 of the support arm 2 is formed in the attachment extension 9. For this purpose, the attachment extension 9 has a front ball joint section 28 extending from the ball joint shell 8, to which an end section 29 adjoins. The front ball joint section 28 is thicker than the end section 29. A bearing opening 30 extending the width of the attachment extension 9 is formed in the ball joint section 28. Rear areas of the ball joint section 28 are rounded. The free ends of the sheet metal shells 11, 12 have a recess 31 adapted to the contour of the rear area of ​​the ball joint section 28. The sheet metal shells 11, 12 are attached to the ball joint section 28 and joined to it. Prong-shaped projections 32 of the end section 29 project rearward into the hollow chamber section 10 of the link body 5.Support flanks 33 are formed on the fastening extension 9, which are in contact with support sections 34 in the handlebar body 5 and support the sheet metal shells 11, 12.

[0060] In the control arms 3 and 4, the ball joint receptacle 24 is formed by communicating bearing openings 35, 36 in the side walls 15, 16 of the sheet metal shells 11, 12 of the control arm body 5. The fastening extension 9 is shorter and ends before the ball joint receptacle 24. The bearing openings 35, 36 each have a circumferential, inwardly directed rim 37, which forms the bearing seat in the ball joint receptacle 24.

[0061] The side walls 15, 16 in the hollow chamber section 10 and the fastening extension 9 contact each other and support each other. Support flanks 33 are also formed on the fastening extension 9 of the supporting links 1, 3, and 4, which are in contact with support sections 34 provided on the link body 5.

[0062] The control arms 5 of the support arms 1 - 4 have a predetermined bending point 38 near the axle carrier-side connection, i.e. in the area of ​​the second longitudinal end 7. This is formed by a bead 39 running in the z-direction, which extends over the entire height h of the control arm 5. The predetermined bending point 38 causes the control arm 5 to bend in a targeted manner in the transverse direction of the vehicle when a certain force level on the wheel is exceeded. Even in the event of an impact with lesser overlap and a force acting on the wheel in the longitudinal direction of the vehicle, a collapse of the control arm 5 is initiated via the predetermined bending point 38. Due to the bead 39 running in the z-direction, i.e. in the vertical direction of the control arm 5, the control arm 5 is curved in the area of ​​the predetermined bending point or has a curved longitudinal extension in its longitudinal extent.

[0063] The control arms 5 of the support arms 1-4 have a yield strength R p 0.2 between 480-880 MPa, a tensile strength R m between 580-1050 MPa, and a minimum elongation at break A 80mm of >8%. The ball joint shells 8 of the support arms 1-4 have a yield strength R p 0.2 between 400-600 MPa, a tensile strength R m between 600-820 MPa, and a minimum elongation at break A5 of >14%.

[0064] The control arms 1-4 with a control arm body 5 and a ball joint shell 8, in the material combination and mechanical properties as described above, as well as the geometric design, complement each other synergistically and ensure that the control arms 1-4 meet high and extremely high rigidity requirements and can withstand even the highest dynamic loads. The geometric design refers to the installation position of the control arms 1-4 in a motor vehicle. The control arm body 5 has a height h and a width b in its vertical cross-section. It is essential that the height h is greater than the width b. Reference symbol:

[0065] 1 - Suspension arm 2 - Suspension arm 3 - Suspension arm 4 - Suspension arm 5 - Control arm body 6 - First longitudinal end of 5 7 - Second longitudinal end of 5 8 - Ball joint shell 9 - Fastening extension 10 - Hollow chamber section 11 - Sheet metal shell 12 - Sheet metal shell 13 - Rivet connection 14 - Bead 15 - Side wall 16 - Side wall 17 - Vertical web 18 - Hollow chamber section 19 - Hollow chamber section 20 - Bearing holder 21 - Bearing opening 22 - Bearing opening 23 - Rim 24 - Ball joint holder 25 - Bearing opening of 15 26 - Bearing opening of 16 27 - Bearing opening of 9 28 - Ball joint section 29 - End section 30 - Bearing opening 31 - Recess 32 -Protrusions 33 -Support flank 34 -Support section 35 -Bearing opening 36 -Bearing opening 37 -Rim 38 -Predetermined bending point 39 -Bead h -Height b -Width

Claims

1. Support link arm, which has an elongated link arm body (5), wherein a ball joint shell (8) is disposed at a first longitudinal end (6) of the link arm body (5), which forms a first connection point, wherein the link arm body (5) is made of sheet metal, wherein the link arm body (5) is composed of shell segments, in particular of two sheet metal shells (11, 12), and wherein the link arm body (5) has a height (h) and a width (b) in vertical cross-section, wherein the height (h) is greater than the width (b) of the link arm body (5) and the link arm body (5) has a hollow chamber section (10) and the ball joint shell (8) is a forged or cast part, made of metal, and has a fastening extension (9), wherein the ball joint shell (8) engages with the fastening extension (9) in the hollow chamber section (10) of the link arm body (5) and is joined to the link arm body (5), characterised in that a bearing mount (20) is provided at the second longitudinal end (7) opposite the first longitudinal end (6), which forms a second connection point, wherein the bearing mount (20) is formed by bearing openings (21, 22) in side walls (15, 16), that are spaced apart parallel to one another, in the second longitudinal end (7), wherein each bearing opening (21, 22) has a circumferential ring directed inwards towards the interior of the control link arm body (5) and the support link arm (1) has a third connection point in the form of a bearing joint mount (24), which is configured and intended to connect a spring and damper element, wherein the bearing joint mount (24) is formed by bearing openings (25, 26) in the two spaced-apart opposite side walls (15, 16) of the hollow chamber section (10) and by a bearing opening (27) in the fastening extension (9), wherein the bearing openings (25, 26) in the side walls (15, 16) and the bearing opening (27) in the fastening extension (9) are disposed coaxially to one another.

2. Support link arm, which has an elongated link arm body (5), wherein a ball joint shell (8) is arranged at a first longitudinal end (6) of the link arm body (5), which forms a first connection point, wherein the link arm body (5) is made of sheet metal, wherein the link arm body (5) is composed of shell segments in the form of two sheet metal shells (11, 12), and wherein the link arm body (5) has a height (h) and a width (b) in vertical cross-section, wherein the height (h) is greater than the width (b) of the link arm body (5) and the link arm body (5) has a hollow chamber section (10) and the ball joint shell (8) is a forged or cast part, made of metal, and has a fastening extension (9), wherein the ball joint shell (8) engages with the fastening extension (9) in the hollow chamber section (10) of the link arm body (5) and is joined to the link arm body (5), characterised in that a bearing mount (20) is provided at the second longitudinal end (7) opposite the first longitudinal end (6), which forms a second connection point, wherein the bearing mount (20) is formed by bearing openings (21, 22) in side walls (15, 16), that are spaced apart parallel to one another, in the second longitudinal end (7), wherein each bearing opening (21, 22) has a circumferential ring directed inwards towards the interior of the control link arm body (5) and the support link arm (1) has a third connection point in the form of a bearing joint mount (24), which is configured and intended to connect a spring and damper element, wherein the bearing joint mount (24) is configured by mutually communicating bearing openings (35, 36) in the side walls (15, 16) of the sheet metal shells (11, 12) of the control link arm body (5), wherein the bearing openings (35, 36) each have a circumferential inwardly directed ring (37) which form the bearing seat in the bearing joint mount (24) and the fastening extension (9) ends in front of the bearing joint mount (24).

3. Support link arm according to claim 1 or 2, characterised in that side walls (15, 16) of the hollow chamber section (10) and the fastening extension (9) contact one another.

4. Support link arm according to any one of claims 1 to 3, characterised in that support flanks (33) are formed on the fastening extension (9), which are in contact with support sections (34) provided on the link arm body (5).

5. Support link arm according to any one of claims 1 to 4, characterised in that the link arm body (5) is configured to be rectangular in part in vertical cross-section.

6. Support link arm according to any one of claims 1 to 5, characterised in that the link arm body (5) is configured in part as a double-T shape in vertical cross section.

7. Support link arm according to any one of claims 1 to 6, characterised in that the link arm body (5) has at least one bead (14) oriented in its longitudinal direction.

8. Support link arm according to any one of claims 1 to 7, characterised in that the link arm body (5) has at least one predetermined bending point (38).

9. Support link arm according to any one of claims 1 to 8, characterised in that the ball joint shell (8) and the link arm body (5) are joined by material bonding, in particular by welding.

10. Support link arm according to any one of claims 1 to 9, characterised in that the ball joint shell (8) and the link arm body (5) are joined in a form-fitting manner, in particular by riveting.

11. Support link arm according to any one of claims 1 to 10, characterised in that the link arm body (5) has a yield strength Rp0.2 of between 480 - 880 MPa inclusive, a tensile strength Rm of between 580 - 1,050 MPa inclusive and an elongation at break min. A80mm of > 8%, and the ball joint shell has a yield strength Rp0.2 of between 400 - 600 MPa inclusive, a tensile strength Rm of between 600 - 820 MPa inclusive and an elongation at break min. A5 of greater than > 14%.