Guide rod for wheel suspension in motor vehicle

Abstract

The invention relates to a guide rod (1) for a wheel suspension in a motor vehicle, comprising a guide rod body (2), which has two side walls (3), in at least one of which an elongated hole (4) is provided, in which an eccentric bracket (5) is fixed, which has a base plate (6) having an elongated hole opening (7), on the rear side of which an anchor body (8) is provided, the anchor body extends on the edge side of the slot opening, two eccentric stops (10) protruding from the base plate are arranged on the front side of the base plate, and the eccentric support is connected in the slot through the anchor body in a pressing mode in the slot, and the anchor body is formed around the slot opening in an annular surrounding mode. A crush engagement is created between the circumferential outer surface of the anchor body and the inner surface of the elongated hole in the sidewall. The guide rod is lightweight and functionally improved.

Description

Technical Field

[0001] The invention relates to a control arm for a wheel suspension in a motor vehicle, comprising a control arm body made of light metal, in particular aluminum, having two mutually parallel side walls, in at least one of which a slot for an eccentric support is provided. Background Art

[0002] The control arm is a component of the wheel suspension of a motor vehicle. The control arm needs to withstand high radial forces, such as braking forces and driving forces. In addition, the control arm supports the weight of the motor vehicle in cooperation with other chassis components.

[0003] The eccentric adjustment device can be used to orient the control arm relative to the connection on the wheel carrier side. The eccentric adjustment device usually has an eccentric element (e.g. an eccentric wheel or an eccentric screw) and / or a control element. In this way, vehicle deviations can be compensated and the toe and / or camber of the wheels of the motor vehicle can also be adjusted. The eccentric adjustment device interacts with the elongated holes in the side walls of the control arm, to which the eccentric adjustment device can be fastened by means of an eccentric bracket.

[0004] The prior art includes: embodiments of a guide rod with an eccentric adjustment device, as disclosed in US 2020 / 0361265 A1, DE 10 2019 002 874 A1 or KR 1009 07 068 B1.

[0005] In order to achieve the lowest possible component weight, the link body of the link is often produced from light metal or a light metal alloy, in particular from 5000 series to 7000 series aluminum.

[0006] A control arm body made of light metal is advantageous in terms of weight. However, due to the high forces and moments acting during operation, the components are also susceptible to damage or wear. The control arm body can also be damaged during assembly or during the adjustment process for the toe angle and camber angle. This also applies to control arm bodies made of other lightweight construction materials, for example, fiber composite plastics. Summary of the invention

[0007] Starting from the prior art, the object of the invention is to provide a guide arm of lightweight construction and improved in terms of function, which is improved with regard to wear protection, in particular in the area of ​​the connection of the eccentric adjustment device on or in the side wall of the guide arm body.

[0008] This object is achieved by a guide rod according to claim 1 .

[0009] Advantageous embodiments and developments of the control arm according to the invention are the subject matter of the dependent claims.

[0010] The features and modifications of the control arm according to the invention which, individually or in combination, develop and / or expand the invention in a technically advantageous manner also emerge from the description and the drawings.

[0011] The guide arm according to the invention for a wheel suspension in a motor vehicle has a guide arm body. In particular, the guide arm body is made of light metal, preferably aluminum or an aluminum alloy from the 5000 series to the 7000 series. The guide arm body has two side walls, which are in particular parallel to each other. An elongated hole for an eccentric support is provided in at least one of the side walls. The eccentric support cooperates with an eccentric adjustment device. By means of the eccentric adjustment device, the relative position of the guide arm and the wheel suspension can be determined and the camber angle and the toe angle can be adjusted.

[0012] The eccentric support can also be fixed on or in the long hole of the side wall. According to the present invention, the eccentric support has a base plate, the base plate has a long hole opening, and an anchor body is arranged on the back side of the base plate, and the anchor body is arranged on the edge side of the long hole opening. Two eccentric stops extending from the base plate are arranged on the front side of the base plate. In particular, each eccentric stop is arranged on the edge side of the base plate, and each eccentric stop is used as a control track for an adjustment element of an eccentric adjustment device (especially an eccentric wheel). According to the present invention, the eccentric support is squeezed into the long hole by the anchor body. For this purpose, the anchor body of the eccentric support and the long hole in the side wall of the guide rod are manufactured and adapted to each other in configuration, so that a press fit is generated after joining at the connection point. Therefore, longitudinal forces and transverse forces can be transmitted in a force-locking manner.

[0013] The eccentric support according to the invention assumes a protective function in the component against wear and damage when setting the toe-in and camber and also serves as an eccentric stop for the eccentric adjustment device. In particular, the elongated hole in the side wall of the guide arm body or the area around the elongated hole is protected against wear and damage.

[0014] The eccentric support according to the invention is pressed and extruded into the long hole in the side wall of the guide rod body by an anchor body. This connection is highly stable and can withstand high loads. Forces are reliably received and transmitted. The guide rod body made of light metal is protected from wear and damage in the connection area by the eccentric support. In addition, material costs, weight and the material itself can be saved by the eccentric support. The eccentric support is also advantageous in terms of structural space technology. The eccentric support is fixed in the long hole by the anchor body, which is structural space optimized. The base plate of the eccentric support is directly against the side wall of the guide rod body. The anchor body ensures a highly load-bearing connection of the eccentric support on the side wall, the anchor body forms a mechanical protector, and the anchor body simultaneously provides a long hole opening for the eccentric adjustment device. Further structural space optimization is possible by integrating the eccentric stops into the eccentric support.

[0015] The anchor body of the eccentric support is arranged on the back side of the base plate. The back side of the base plate means that the anchor body protrudes from the base plate on the side of the side wall pointing to the guide rod body. Preferably, the anchor body is formed around the long hole opening. In this configuration, the anchor body is formed in an annular shape. The longitudinal walls or longitudinal connecting plates of the anchor body extend in parallel and transition to each other through semicircular wall sections of the anchor body. Preferably, the anchor body is a long hole-shaped ring or ring that is bent out of the plane of the base plate on the back side of the base plate.

[0016] In principle, the anchor body can also have a plurality of anchor body sections or anchor body elements which are arranged at the edge of the elongated hole opening.

[0017] The anchor body is arranged and determined to be introduced into the elongated hole of the side wall of the link body and to be pressed and engaged with the side wall in the elongated hole, so that the eccentric support is securely fixed on the side wall of the link body.

[0018] The eccentric support is formed in one piece. The base plate, the anchor body and the eccentric stop materials are formed uniformly and in one piece. In particular, the eccentric support is made of steel.

[0019] The eccentric stops are arranged on the front side of the base plate. The front side of the base plate means that the eccentric stops are arranged on the side of the eccentric support or the base plate facing away from the side wall of the guide rod body. The eccentric stops are formed from the material of the eccentric support in the base plate. The eccentric stops can be formed, for example, as protrusions or necks on or in the base plate. In particular, the eccentric stops are formed by edge connecting pieces bent out on the outer periphery of the base plate.

[0020] The eccentric stop formed by the edge connecting piece that bends out is produced by bending. Here, the tongue on the edge of the base plate is plastically deformed and bent forward from the plane of the base plate so that these tongues form the edge connecting piece.

[0021] The elongated hole in the side wall of the guide rod body and the elongated hole opening in the base plate of the eccentric support are oriented coaxially with respect to one another, or lie on a common center axis. The anchor body is pressed into engagement in the elongated hole in the side wall. After engagement at the connection point, a press fit is produced between the inner periphery of the elongated hole and the outer periphery of the anchor body. Longitudinal and transverse forces are transmitted in a force-locking manner.

[0022] In order to increase the pressing force of the anchor body in the slotted hole, the anchor body can be mechanically expanded. This is achieved by applying an external force on the inner side of the slotted hole opening.

[0023] An advantageous embodiment provides that a positive connection is additionally produced between the anchor body and the side wall. For this purpose, the anchor body is additionally formed. This is preferably achieved by the anchor body being crimped, stamped, riveted or pressed from the back side of the base plate or on the side of the side wall opposite to the base plate. Through-joining is also conceivable.

[0024] In particular, the anchor body at least partially penetrates the elongated hole in the side wall and is formed on the side of the side wall opposite the base plate.

[0025] As already mentioned, the guide rod body is preferably made of light metal or a light metal alloy. In particular, the guide rod body is made of aluminum or an aluminum alloy.

[0026] The link body can be produced from a lightweight material, more precisely a metallic lightweight material or a non-metallic lightweight material such as, in particular, a fiber-composite plastic.

[0027] The eccentric support is made of a material having a higher strength than the material of the guide rod body.

[0028] The eccentric support is produced in particular from steel.

[0029] A further advantageous embodiment provides that the eccentric support has a surface coating. In practice, in particular zinc coatings or zinc flake coatings are particularly well suited.

[0030] Depending on the structural form or model series, the base plate has a rectangular outer contour. It is also possible that the base plate has a circular or oval outer contour.

[0031] It is also conceivable that the base plate is inserted into a receptacle in the side wall. The side wall of the link body then has a recess in the region around the slotted hole which is adapted to or matched to the outer contour of the base plate, into which recess the base plate is preferably inserted flush. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be described in more detail below with the aid of the embodiments described in the accompanying drawings. The accompanying drawings are as follows:

[0033] Figure 1 A detail of the guide rod is shown in a perspective view, wherein the side wall and the eccentric bracket engaging with the side wall are depicted;

[0034] Figure 2 The eccentric bracket is shown in side view;

[0035] Figure 3 Show the eccentric bracket in top view;

[0036] Figure 4 show Figure 2 as well as Figure 5 a sectional view along line AA of the view; and

[0037] Figure 5 A further embodiment of an eccentric support is shown in a front view. DETAILED DESCRIPTION

[0038] exist Figure 1 Detailed description of a control arm 1 for a wheel suspension in a motor vehicle is provided. The control arm has a control arm body 2 made of a light metal material, in particular an aluminum material from the 5000 series to the 7000 series. The control arm body 2 has two mutually parallel side walls 3, of which only the longitudinal section of one side wall 3 of the control arm body on the wheel carrier side is described here.

[0039] An elongated hole 4 for an eccentric support 5 is provided in the side wall 3. The eccentric support 5 is also Figures 2~5 The eccentric support 5 has a base plate 6 with a slotted opening 7. An anchor body 8 is formed on the back side of the base plate 6 and extends around the slotted opening 7 on the edge side. On the front side or on the front side 9 of the base plate 6, two eccentric stops 10 extending from the base plate 6 are provided. The anchor body 8 is formed in an annular manner around the slotted opening 7. The anchor body 8 has a ring 11 extending around the slotted opening 7 and extending from the back side 12 of the base plate 6.

[0040] The eccentric support 5 with the base plate 6 , the anchor body 8 and the eccentric stops 10 is formed from a uniform material in one piece.

[0041] The eccentric support 5 is introduced into the elongated hole 4 of the side wall 3 via the anchor body 8 and is pressed into engagement in the elongated hole 4. The outer contour of the anchor body 8 and the inner contour of the elongated hole 4 in the side wall 3 of the guide rod body 2 are manufactured and dimensionally and geometrically adapted to each other so that a press fit is produced by pressing engagement on the circumferential engagement surface.

[0042] The eccentric stops 10 are formed by edge webs 13 which are bent over on the outer periphery 14 of the base plate 6 .

[0043] The eccentric support 5 is made of steel and provided with a surface coating, which is in particular a zinc coating or a zinc flake coating.

[0044] By means of a press fit between the surrounding outer surface of the anchor body 8 and the inner surface of the slot 4 in the side wall 3, a force-locking joint that can withstand high loads is produced. In order to increase the contact pressure, the anchor body 8 can expand from the slot opening 7 internally. Alternatively or additionally, the press fit can be supplemented by a form-locking joint. For this purpose, the anchor body 8 is at least partially crimped, stamped, riveted or pressed on the side 15 of the side wall 3 opposite the base plate 6. In particular, the anchor body 8 can at least partially penetrate the slot 4 in the side wall 3 and be formed, for example crimped, stamped, riveted or pressed on the side of the side wall 3 opposite the base plate 6.

[0045] exist Figure 1 and Figure 2 As can be seen from the view of FIG. 5 , the base plate 6 has a substantially rectangular outer contour.

[0046] As in Figure 5The eccentric support 5 described in the figure corresponds functionally to the eccentric support described above. The base plate 6 has a circular outer contour.

[0047] As in Figure 1 As can be seen in the figure, the base plate 6 rests with its back side 12 on the outside of the side wall 3 and projects relative to the outer surface of the side wall 3. It is also possible to provide a recess in the side wall 3 that is adapted in configuration to the outer geometry of the base plate 6, into which the eccentric support 5 is inserted with the base plate 6. Reference numerals list

[0048] 1 Guide rod

[0049] 2 guide rod body

[0050] 3 Sidewall

[0051] 4 Long hole in side wall 3

[0052] 5 Eccentric bracket

[0053] 6 substrates

[0054] 7 Long hole opening

[0055] 8 Anchor

[0056] 9 Front side of substrate 6

[0057] 10 Eccentric stop

[0058] 11 rings

[0059] 12 Back side of substrate 6

[0060] 13 Edge connection piece

[0061] 14 Surroundings

[0062] 15 One side of the side wall 3

Claims

1. A guide rod (1) for a wheel suspension in a motor vehicle, the guide rod comprising a guide rod body (2), the guide rod body having two side walls (3), a long hole (4) being arranged in at least one of the side walls (3), an eccentric bracket (5) being fixed in the long hole, the eccentric bracket (5) having a base plate (6), the base plate having a long hole opening (7), an anchor body (8) being arranged on the back side of the base plate (6), the anchor body extending on the edge side of the long hole opening (7), and two eccentric stops (10) extending from the base plate (6) being arranged on the front side of the base plate (6), and the eccentric bracket (5) being pressed and engaged in the long hole (4) by the anchor body (8), characterized in that The anchor body (8) is designed to be annularly circumferential around the elongated hole opening (7), producing a press fit between the circumferential outer surface of the anchor body (8) and the inner surface of the elongated hole (4) in the side wall (3).

2. The guide rod (1) according to claim 1, characterized in that The anchor body (8) has a ring (11) extending around the slotted opening (7) and projecting from the rear side (12) of the base plate (6).

3. The guide rod (1) according to claim 1 or 2, characterized in that: The eccentric stop (10) is formed by a bent-out edge web (13) on the outer periphery (14) of the base plate (6).

4. The guide rod (1) according to any one of claims 1 to 3, characterized in that The eccentric support (5) having the base plate (6), the anchor body (8) and the eccentric stops (10) is formed of a uniform material and in one piece.

5. The guide rod (1) according to any one of claims 1 to 4, characterized in that The anchor body (8) at least partially penetrates the elongated hole (4) in the side wall (3) and is formed on a side (15) of the side wall (3) opposite to the base plate (6).

6. The guide rod (1) according to any one of claims 1 to 5, characterized in that The guide rod body (8) is made of aluminum.

7. The guide rod (1) according to any one of claims 1 to 6, characterized in that The eccentric bracket (5) is made of steel.

8. The guide rod (1) according to any one of claims 1 to 7, characterized in that The eccentric support (5) has a surface coating, in particular a zinc coating or a zinc flake coating.

9. The guide rod (1) according to any one of claims 1 to 8, characterized in that The base plate (6) has a rectangular outer contour.

10. The guide rod (1) according to any one of claims 1 to 8, characterized in that The base plate (6) has a circular or oval outer contour.

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