DE102013213038A1 - Wishbone for a vehicle suspension - Google Patents

Abstract

A suspension arm for a vehicle wheel suspension comprises a wheel-side attachment portion (4), a first body-side attachment portion (5), a second body-side attachment portion (6), and a connection structure (7) extending between these attachment portions (4, 5, 6). The connecting structure (7) has a pocket (8) extending from the wheel-side connecting section (4) to the second body-side connecting section (6), which pocket is curved and past the first body-side connecting section (5). In a middle section (9) of the pocket (8), a raised portion (10) opposite the same is formed next to the first body-side connecting portion (5). The elevation (10) is formed as an inclined plane (12) which angled to a through the bottom (13) of the pocket (8) pocket plane (14) and in the direction of an imaginary, the wheel-side connecting portion (4) and the second body side Connecting portion (6) connecting line (15) is inclined towards. The inclination of the survey (10) causes a targeted application of force in this area in case of failure and initiates a defined biaxial folding in the desired direction. This allows for abuse load cases a particularly high energy consumption.

Description

The invention relates to a suspension arm for a vehicle wheel suspension comprising a wheel-side attachment portion, a first body-side attachment portion, a second body-side attachment portion, and a connection structure extending between these attachment portions and a extending from the wheel-side attachment portion to the second body-side attachment portion pocket which is arc-shaped and guided past the first body-side attachment portion, wherein in a central portion of the pocket adjacent to the first body-side attachment portion opposite to the same remote collection is formed.

Wishbones are used in vehicle wheel suspensions to support a wheel carrier relative to a vehicle body or component such as a subframe. They are in a barely manageable variety of configurations state of the art.

In the construction of wishbones a high rigidity with low component weight and low space requirement is sought. In terms of the production of large numbers of wishbones must also be as simple and inexpensive to produce.

A wishbone of the type mentioned is out EP 0 794 075 A2 known. Other wishbone are, for example, in DE 10 2007 049 113 A1 and DE 10 2010 007 944 A1 described.

Against this background, the invention has the object to provide further alternatives to existing wishbones.

In particular, the invention aims to improve the energy absorption potential of a control arm of the type mentioned in Abuse's load case without sacrificing the component weight and ease of manufacture.

This object is achieved by a wishbone according to claim 1. The wishbone according to the invention comprises a wheel-side attachment portion, a first body-side attachment portion, a second body-side attachment portion, and a connection structure extending between these attachment portions and having an arcuate pocket extending from the wheel-side attachment portion to the second body-side attachment portion adjacent to the first body-side attachment Connecting portion is guided past, and is formed in a central portion of the arcuate pocket adjacent to the first body-side connection portion opposite the same raised survey. It is characterized in that the offset relative to the bag elevation is formed as an inclined plane, which is angled at a defined by the bottom of the bag pocket level and inclined in the direction of an imaginary, the wheel-side connecting portion and the second body-side connecting portion connecting line.

The allows by a biaxial folding of the control arm in case of misuse load cases, a particularly high energy consumption.

The inclination of the survey causes a targeted application of force in this area in case of failure and initiates a defined biaxial folding in the desired direction.

Compared to einachsig kinking arm, an inventive wishbone collapses less up and down.

In addition, comparatively more material is deformed within the wishbone.

Another advantage is that the energy absorption takes place over a larger deformation path.

Advantageous embodiments of the control arm according to the invention are specified in further claims.

In particular, it has been shown that the desired effect can be realized even with small angles of inclination, whereby the shape of the control arm is not affected. Preferably, the inclined plane is angled at an angle of inclination in the range of 1 ° to 10 ° to the pocket plane.

In view of a high rigidity, the connecting structure may have a first bead, which extends from the wheel-side connecting portion on the first body-side connecting portion to the second body-side connecting portion.

In a preferred embodiment, the apex of the first sipe defines a major plane, the inclined plane being disposed between the pocket plane and the middle between the pocket plane and the main plane. In this area, the height of the inclined plane above the pocket level can easily be varied to influence the deformation result in case of failure.

Further, the connection structure may have a second bead to further increase the rigidity of the control arm without appreciable weight gain. Preferably, the second bead extends with respect to the pocket opposite the first bead from the wheel-side attachment portion to the second body-side attachment portion.

To further improve a targeted biaxial folding, the raised opposite the pocket survey can pass in a continuous away from the pocket plane arc into inner side walls of the first and second beads. In particular, this reduces the risk of increased deflection upwards or downwards and promotes biaxial folding.

For this purpose, it is also advantageous if the first bead with an inner side wall wall section continuously limits the inclined plane over the entire length of the survey. A branch of the bag into the first connection section, as in EP 0 794 075 A2 would be counterproductive.

Furthermore, the arcuate pocket can be recessed in the connecting structure such that the pocket plane is enclosed by a continuous side wall. This allows an additional gain in stiffness without gaining weight.

In a further preferred embodiment, the survey is offset on both sides by at least two angled edges relative to the arcuate pocket, wherein the edges are predominantly transverse to the pocket and form two desired folding areas for a purposeful collapse of the wishbone. In a collapse of the control arm so its arms can be approximated substantially in the main extension plane of the handlebar, whereby due to the resulting deformation much energy is absorbed, which can reduce the total energy of an impact.

With regard to a defined compact biaxial folding, it has also been found to be advantageous if imaginary continued extensions of the edges intersect each other, but the point of intersection outside the transverse link lies within the connecting line between the wheel-side connecting section and the second body-side connecting section.

The above concept of directional biaxial folding can be realized regardless of the construction and production manner of the control arm. However, this is preferably used in transverse links, in which the wheel-side connection portion, the first body-side connection portion, the second body-side connection portion and the connection structure are formed as a single-shell sheet metal part. Such is particularly simple and inexpensive to produce and therefore particularly suitable for mass production.

The invention will be explained in more detail with reference to an embodiment shown in the drawing. The drawing shows in

1 a top view of an embodiment of a control arm according to the invention,

2 a view obliquely from above the wishbone 1 .

3 another view from diagonally above the wishbone 1 ,

4 a sectional view taken along the line IV-IV in 1 , and in

5 a sectional view taken along the line VV in 1 ,

The embodiment shows a control arm 1 for a wheel suspension of a motor vehicle, in particular a passenger car or a light commercial vehicle.

The wishbone 1 is with two legs arranged approximately at right angles to each other 2 and 3 shown. However, such a handlebar 1 also be used as a semi-trailing arm, including the angle between the legs 2 and 3 smaller or larger can be selected.

When installed in a suspension, a first leg extends 2 predominantly in the vehicle transverse direction, whereas the second leg 3 predominantly runs in the vehicle longitudinal direction.

At a free end of the first leg 2 is a wheel-sided connecting section 4 provided, via which a wheel carrier can be coupled.

The storage section 4 at the other end of the first thigh 2 opposite is a first body-side attachment section 5 provided over which the wishbone 1 can be articulated on the vehicle body.

A second body-side connection section 6 is located as a second body-side pivot point at the free end of the second leg 3 ,

The articulation can be done directly on the construction of the motor vehicle or on a subframe connected to the structure.

In 1 is the first body-side connection section 5 in the vehicle longitudinal direction in front of the second body-side connection portion 6 ,

The thigh 2 and 3 define a connection structure 7 , which are located between the aforementioned connection sections 4 . 5 . 6 extends.

The wheel-side connection section 4 , the first body-side attachment section 5 , the second body-side attachment section 6 and the connection structure 7 can be integrated into a single-shell sheet metal part. The sheet metal part can be produced with low degrees of deformation, preferably in one go.

The connection structure 7 has a from the wheel-side connection section 4 to the second body-side attachment section 6 extending arched bag 8th on. This is in the first and second thighs 2 and 3 recessed and leads in an arc at the first body-side connection portion 5 past.

In a middle section 9 the arched bag 8th is next to the first body-side connection section 5 one opposite the bag 8th detached survey 10 educated. From the survey 10 starting the bag falls 8th in the direction of the free ends of both legs 2 and 3 from. The assessment 10 can from an opening 11 be interspersed.

The opposite the bag 8th detached survey 10 is as inclined plane 12 formed in the direction of the curvature inner side of the control arm 1 drops. In particular, the inclined plane 12 to one by the reason 13 the pocket 8th defined pocket level 14 angled and in the direction of an imaginary, the wheel-side connection section 4 and the second body-side attachment portion 6 connecting line connecting 15 inclined towards.

The angle of inclination of the inclined plane 12 to the pocket level 14 is preferably in the range of 1 ° to 10 °. As a result, in abuse abuse a targeted biaxial folding of the wishbone 1 essentially in the pocket plane 14 achieved without causing large deviations across the pocket level 14 comes up or down.

The inclined plane 12 is on both sides by at least two angled edges 16 and 17 such as 18 and 19 opposite the arched bag 8th discontinued. As a result, transition sections are formed over which the inclined plane 12 each in the ground 13 the pocket 8th passes. The reason 13 can be formed by flat pocket sections, which in the pocket level 14 can fall.

The edges 16 to 19 each run mostly across the bag 8th and form two desired folding areas for a purposeful collapse of the control arm 1 ,

Both the imaginary continued extensions of the inner edges 16 and 18 as well as the imaginary continued extensions of the inner edges 17 and 19 intersect each other, with the respective intersection S1 and S2 outside the wishbone 1 however within the connecting line 15 between the wheel-side connection section 4 and the second body-side attachment portion 6 lies.

The pocket 8th is limited by two beads which are formed in the connecting structure.

A first bead 20 extends from the wheel-side connection section 4 at the first body-side attachment portion 5 over to the second body-side attachment section 6 runs. While an inside sidewall 21 the first bead 20 the pocket 8th arcuate limited, and in particular the inclined plane 12 over the entire length of the survey 10 continuously and continuously limited, is the opposite, outside sidewall 22 the first bead 20 at least in the region between the second body-side attachment section 6 and the first body-side attachment portion 5 exhibited down, with the edge of the outside sidewall 22 up to the level of the pocket level 14 extends downwards. Also in the area between the first body-side connection section 5 and the wheel-side attachment portion may be the outside sidewall 22 up to the level of the pocket level 14 be pulled down. However, this may be the edge of the outside sidewall 22 at least in one to the first connection section 5 expiring portion to be bent outwards.

The connection structure 7 also has a second bead 23 on, the first bead 20 in terms of the bag 8th opposite from the wheel-side connection section 4 to the second body-side attachment section 6 runs.

The arched bag 8th is recessed in the connection structure 7 is, so the pocket level 14 is enclosed by a continuous sidewall. In the area of the leg ends can each have a bead 24 respectively. 25 the pocket level 14 opposite the respective connection section 4 respectively. 6 delimit.

In the area of the survey 10 closes the inclined plane 12 flush with the inner side walls 21 and 26 the two beads 20 and 23 at. Notches between the inclined plane 12 and the side walls 21 and 26 are avoided. Rather, the opposite goes to the bag 8th detached survey 10 in each case one from the pocket level 14 guiding bow 27 respectively. 28 in the inner side walls 21 and 26 the first and second bead 20 and 23 above.

The inclined plane 12 preferably extends in the lower half of the pocket depth. Like through the crown 29 the first bead 20 a main level 30 defined, so is the inclined plane 12 between the pocket level 14 and the middle between the pocket level 14 and the main level 30 arranged. The location of the inclined plane 12 can be varied in this range to optimize the desired deformation result.

The above-explained geometry allows a targeted introduction of force in the region of the survey 10 , In the case of failure, the arrangement of the geometry causes a collapse with particularly high energy consumption by the emergence of two folding areas instead of a single folding area.

As a result, this leads to a significantly higher material deformation within the component. The deformation energy required for this reduces the total energy of an impact to a correspondingly increased extent.

The invention has been explained above with reference to an embodiment. However, it is not limited thereto, but includes all the embodiments defined by the claims.

LIST OF REFERENCE NUMBERS

1

wishbone

2

first leg

3

second leg

4

wheel-side connection section

5

first body-side connection section

6

second body-side connection section

7

connecting structure

8th

bag

9

Middle section of the bag

10

survey

11

opening

12

inclined plane

13

Reason of the bag

14

pocket level

15

imaginary connecting line

16

inside edge

17

outboard edge

18

inside edge

19

outboard edge

20

first bead

21

inside side wall

22

outside sidewall

23

second bead

24

bead

25

bead

26

inside side wall

27

bow

28

bow

29

vertex

30

main level

S1

intersection

S2

intersection

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0794075 A2 [0004, 0019]
• DE 102007049113 A1 [0004]
• DE 102010007944 A1 [0004]

Claims (9)

A transverse link for a vehicle wheel suspension, comprising: a wheel-side attachment section ( 4 ), a first body-side attachment section ( 5 ), a second body-side attachment section ( 6 ), and a connection structure ( 7 ), which are located between these connection sections ( 4 . 5 . 6 ) and extending from the wheel-side attachment section (FIG. 4 ) to the second body-side attachment section (FIG. 6 ) extending pocket ( 8th ), which is arc-shaped and formed on the first body-side attachment section (FIG. 5 ) is passed, wherein in a middle section ( 9 ) the pocket ( 8th ) next to the first body-side attachment section ( 5 ) a survey on the same ( 10 ) is formed, characterized in that the opposite the bag ( 8th ) remote survey ( 10 ) as an inclined plane ( 12 ) formed by one of the reason ( 13 ) the pocket ( 8th ) defined pocket level ( 14 ) and in the direction of an imaginary, the wheel-side connection section ( 4 ) and the second body-side attachment section ( 6 ) connecting line ( 15 ) is inclined. Wishbone according to claim 1, characterized in that the inclined plane ( 12 ) with an inclination angle in the range of 1 ° to 10 ° to the pocket plane ( 14 ) is angled. Wishbone according to claim 1 or 2, characterized in that the connection structure ( 7 ) a first bead ( 20 ) connected by the wheel-side connecting section ( 4 ) on the first body-side attachment section ( 5 ) over to the second body-side attachment section ( 6 ), the vertex ( 29 ) of the first bead a main plane ( 30 ), and the inclined plane ( 12 ) between the pocket level ( 14 ) and the middle between the pocket level ( 14 ) and the main level ( 30 ) is arranged. Wishbone according to claim 3, characterized in that the connection structure ( 7 ) a second bead ( 23 ), the first bead ( 20 ) in relation to the bag ( 8th ) opposite the wheel-side connecting section (FIG. 4 ) to the second body-side attachment section (FIG. 6 ) and the opposite of the bag ( 8th ) remote survey ( 10 ) in a continuous manner from the pocket level ( 14 ) leading away arc ( 27 . 28 ) in internal side walls ( 21 . 26 ) of the first and second beads ( 20 . 23 ) passes over. Wishbone according to claim 3 or 4, characterized in that the first bead ( 20 ) with an inner sidewall wall section the inclined plane ( 12 ) over the entire length of the survey ( 10 ) continuously limited. Wishbone according to one of claims 1 to 5, characterized in that the arcuate pocket ( 8th ) in the connection structure ( 7 ) is recessed so that the pocket plane ( 14 ) is enclosed by a continuous sidewall. Wishbone according to one of claims 1 to 6, characterized in that the survey ( 10 ) on both sides by at least two angled edges ( 16 . 17 . 18 . 19 ) opposite the arcuate pocket ( 8th ), which are predominantly transverse to the pocket ( 8th ) and two desired folding areas for a targeted collapse of the control arm ( 1 ) form. A transverse link according to claim 7, characterized in that imaginary continued extensions of two edges ( 16 . 17 . 18 . 19 ) on both sides of the inclined surface ( 12 ) intersect each other, wherein the intersection (S1, S2) outside the transverse link ( 1 ) but within the connecting line ( 15 ) between the wheel-side connecting section ( 4 ) and the second body-side attachment section ( 6 ) lies. Wishbone according to one of claims 1 to 8, characterized in that the wheel-side connecting portion ( 4 ), the first body-side attachment section ( 5 ), the second body-side attachment section ( 6 ) and the connection structure ( 7 ) are formed as einschaliges sheet metal part.

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