Suspension linkage and method for manufacturing a suspension linkage

Abstract

Suspension link (1) with a one-piece, materially uniform base body (2) which is made from an extruded hollow profile with several hollow chambers (3-5), wherein the base body (2) has at least one bearing receptacle (6, 11, 15) which penetrates the base body (2), wherein a first bearing receptacle (6) is formed by one of the hollow chambers (3), wherein the first bearing receptacle (6) has a first bearing axis (L1) whose direction corresponds to the extrusion direction (E) of the hollow profile forming the first bearing receptacle (6), wherein the base body (2) has a second bearing receptacle (11) in a first end section (10) of the base body (2) which has a second bearing axis (L2), wherein the suspension link (1) is designed as a triangular link, with a further bearing receptacle (15) in a second end section (14) of the base body (2), wherein a central section (7) with the first bearing receptacle (6) is located between the both end sections (10,14) is arranged and wherein the base body (2) has a first leg (8) extending from the first end section (10) to the central section (7) and a second leg (9) extending from the second end section (14) to the central section (7), characterized in that the direction of the second bearing axis (L2) deviates from the extrusion direction (E).

Description

[0001] The invention relates to a chassis control arm, in particular a wishbone according to the features of patent claim 1, and to a method for producing such a control arm according to the features of patent claim 8.

[0002] Chassis control arms, also known as automotive control arms or simply control arms, are typically designed as single- or multi-layer sheet metal components or as forged components in the form of a forged control arm. Such a chassis control arm typically has a base body with bearing mounts for two to three bearings.

[0003] DE 10 2006 051 609 A1 discloses a control arm constructed as a two-part welded component. Two shell elements interlock and are joined by welding. The production of such a control arm is relatively complex, as the various components must be manufactured separately and joined precisely. This places increased demands on the accuracy of the geometry of the components to be joined. Furthermore, welds create thermal influence zones that potentially weaken the material.

[0004] According to DE 10 2010 006 284 A1, cast wishbones are also considered state-of-the-art. Cast construction is inexpensive to manufacture, but requires minimum wall thicknesses, which can lead to increased weight. More complex mechanical post-processing is required.

[0005] DE 197 20 134 A1 discloses a wheel control arm. It is a wishbone manufactured using the extrusion process. In order to manufacture the arm cost-effectively while still allowing the inclusion of additional components, in particular a damper, without excessive effort due to additional components or accessories, a recess in the wishbone for accommodating a damper is formed substantially perpendicular to the extrusion process, with a cutting direction of the recess running in substantially the same direction as the cutting line for cutting out the arm.

[0006] DE 10 2010 051 884 A1 discloses a method for manufacturing a wishbone from a light metal extruded profile. The profile should have at least three adjacent hollow chambers. An upper side and a lower side of a central chamber are shortened at the ends, so that the outer chambers form bearing arms that protrude from the base body. The bearing arms are bent, and connection receptacles are formed in the bearing arms. This is a four-point control arm.

[0007] DE 199 61 425 A1 discloses a multi-part wishbone for a motor vehicle. Several complementary, interlocking profiles are to be coupled together to create a positive connection. The individual profiles are produced separately and, if necessary, using different manufacturing processes, and then joined, for example, using a plug-in or snap-in connection. Truss-type structures are preferably used to meet lightweight construction requirements. The motor vehicle component is preferably a wishbone.

[0008] EP 2 995 481 B1 discloses a method for producing a rod guide from an extruded hollow profile. The rod guide has several longitudinally extending chambers, at least one of which is opened at the edge, so that the rod guide is narrower in the central region than at its ends.

[0009] In the area of ​​the ends, bearing supports are arranged, which penetrate the rod guide transversely to the extrusion direction.

[0010] DE 10 2017 127 788 A1 discloses a manufacturing method for a motor vehicle control arm made from an extruded aluminum profile. The extruded profile initially has at least three hollow profiles or chambers, whose longitudinal axes are aligned parallel to one another in the extrusion direction. It is initially a rod-shaped component that is bent into a U-shaped wishbone. The longitudinal axes of the end bearings are oriented so that they point towards one another. In the central region, the orientation of the hollow chambers there is changed by bending the hollow profile. This is possible because parts of the extruded profile were removed in the central region prior to bending. All bearing mounts are integrally connected to the control arm sections using the same material, even though they point in different spatial directions.Two bearing receptacles are arranged at the ends of the arch and at least one bearing receptacle is arranged in an inner section of the arch.

[0011] DE 10 2017 109 996 A1 discloses a wishbone whose base body consists of a U-shaped sheet metal part. The opposite legs of the U-shaped sheet metal part are provided with aligned bearing eyes. A third bearing of the link is mechanically connected to the opposite walls of the U-shaped sheet metal part. Therefore, at least two profile bodies are provided. Each of the two profile bodies can alternatively be made of an extruded profile, in particular of plastic, in particular of a fiber-reinforced plastic.

[0012] The invention is based on the object of providing a lightweight motor vehicle steering column that is simple and cost-effective to manufacture. Furthermore, a suitable manufacturing method for such a steering column is to be provided.

[0013] The objective part of the problem is solved by a vehicle driver having the features of patent claim 1.

[0014] A method according to claim 8 solves the above-mentioned problem.

[0015] Advantageous further developments of the invention are the subject of the respective subclaims.

[0016] The chassis link according to the invention has a one-piece base body made of the same material. The base body consists of an extruded hollow profile with several hollow chambers. The base body has at least one bearing recess extending through the base body.

[0017] This bearing support is a first bearing support of the chassis link. It is formed by one of the hollow chambers of the extruded hollow profile. The first bearing support has a first bearing axis, the direction of which corresponds to the extrusion direction of the hollow profile forming the first bearing support in the area of ​​the bearing support.

[0018] The extruded hollow profile is designed during the extrusion process so that the cross-section of one of the several hollow chambers serves as the bearing receptacle. For this purpose, the hollow chamber preferably has a circular internal cross-section. In particular, the cross-section of this hollow chamber does not require any further machining to remove material. This makes the production of the chassis link cost-effective. Due to the manufacturing process of the extruded profile, the hollow chamber points in a predetermined direction. This direction is referred to as the extrusion direction. This extrusion direction is retained even if the chassis link or the base body is bent in certain areas after extrusion. After this bending process, the extrusion direction is no longer a straight line. However, within the bearing receptacle, the bearing axis remains a straight line. It points in the extrusion direction in the area of ​​this bearing receptacle.

[0019] Adapted wall thicknesses are possible in this hollow chamber area, which can be achieved through profiling during the extrusion process. This also keeps the suspension link lightweight.

[0020] The chassis link according to the invention provides that a second bearing receptacle has a second bearing axis whose direction deviates from the extrusion direction. In particular, the second bearing axis is perpendicular to the extrusion direction. The second bearing receptacle in the first end section is produced after the hollow profile has been manufactured by material-removing machining. For example, an opening, in particular a bore, is introduced transversely to the hollow profile. In the case of pressed-in bearings, the bearing axes correspond to the respective press-in direction.

[0021] The invention does not preclude the second bearing receptacle from being formed in a further hollow chamber, with the bearing axis of this second bearing receptacle also pointing in the extrusion direction. However, for kinematic reasons, it may be necessary to provide bearing axes in different spatial directions. The invention assumes that at least one of the bearing axes coincides with the extrusion direction of the respective bearing receptacle.

[0022] The chassis control arm is designed as a wishbone with three bearings. According to the invention, it has a bearing receptacle in a second end section of the base body. A middle section with the first bearing receptacle is located between the two end sections. The base body has a first leg that extends from the first end section to the middle section. Furthermore, the base body has a second leg that extends from the second end section to the middle section. It is considered advantageous to connect a separately manufactured bearing to the wishbone via the third bearing receptacle. With a bearing receptacle in the form of a bearing connection, the bearing axis can deviate from the orientation of the bearing connection, e.g., be perpendicular to it. The bearing receptacle can, in particular, be a wall section to which any desired bearing can be attached.

[0023] The base body, as a hollow profile, preferably has opposing, preferably parallel walls and webs connecting the walls. This forms the hollow chambers of the base body. The webs have a longitudinal extension. Due to the extrusion process, the longitudinal extension of the webs corresponds to the extrusion direction. According to the invention, the webs are oriented in the longitudinal direction of the first leg. This means that they also correspond to the extrusion direction of the longitudinal direction of the first leg. Accordingly, the webs run essentially transversely to the second leg if the second leg is arranged at an angle to the first leg.

[0024] A chassis link is subject to significantly different local loads. Therefore, the at least two webs of the hollow profile preferably have a different thickness. In more highly loaded areas, the thickness of the at least one web arranged there is greater than the thickness of a web in a less loaded area of ​​the chassis link. The term "thickness" refers to the average thickness of a web that extends between two opposite walls. Strictly speaking, the thickness of an individual web is not constant across its extension from wall to wall. For manufacturing reasons, transition radii are always present between a web and the respective inner side of the wall. The thickness refers to the average thickness of the web and in particular the thickness in the middle region of the web, whereby it is assumed that the web has its thinnest thickness in the middle region and that the thickness may increase slightly towards the ends of the web.A difference in thickness exists in particular when the difference is greater than 5%, in particular greater than 10% and preferably greater than 20%.

[0025] In a further development of the invention, at least one web is arranged in the first leg and at least one web is arranged in the second leg. The web in the first leg should preferably have a greater thickness than the web in the second leg. The web in the first leg simultaneously forms the boundary between the hollow chamber that serves as the bearing receptacle and the adjacent hollow chamber, which is consequently arranged in the region of the central section and continues into the second leg.

[0026] It is possible to provide more than two hollow chambers. In this case, several hollow chambers or webs are preferably located in the central section, and especially in the area of ​​the first leg. Thicker webs and smaller spacing between adjacent webs significantly stiffen the suspension arm. This allows very high loads to be absorbed, particularly in the area of ​​the first leg, even with a lightweight construction that is extremely cost-effective to manufacture.

[0027] The at least one web in the first leg can simultaneously form the edge region of the first leg. For this purpose, it can be arranged in the edge region of the first leg. The term “edge region” refers not only to the outermost edge or long side of a wall, but also to the region that is a short distance (< 50% of the width of the leg) from the long side. In particular, the web is set back slightly from the outer long side. The distance of the web from the machined long edge of the leg is at least large enough that when a material-removing tool, in particular a milling tool, is used, there is no risk of the respective web coming into contact with the milling tool. Because the webs are preferably arranged as far out as possible in the edge region, i.e. relatively far to the outside, the area moment of inertia of the base body and thus the resistance to torsion is increased.

[0028] In a further development of the invention, opposing walls of the base body can be bent over, at least in some areas, in an edge region of the base body in such a way that the bent, free ends of the walls point towards each other. This additionally closes the base body. The ends pointing towards each other can be joined together, in particular by means of a material-to-material connection (welding, soldering, gluing). In addition, by bending the walls adjacent to a web, the respective edge region of the base body can be significantly stiffened. When bending the ends, a web adjacent to the ends can in particular serve as an abutment for the forming forces, which simplifies forming. A further advantage is that after the material-removing machining, an edge contour can be created which runs partially perpendicular to the extrusion direction.The bent edge areas can run perpendicularly or generally at an angle to the extrusion direction and thus at an angle to the webs. This significantly improves the rigidity of the base body.

[0029] To ensure that forces in the area of ​​the second bearing receptacle can be transmitted even better, it is advantageous if the second bearing receptacle passes through the base body in such a way that the course of at least one of the webs in the base body is interrupted by the bearing receptacle. The at least one web is preferably arranged and oriented such that it intersects the bearing receptacle. In particular, several of the webs intersect the bearing receptacle. This creates a connection between the walls on both sides of the bearing receptacle. The bearing receptacle passes through both opposite walls in particular. A bearing sleeve inserted into the bearing receptacle can transfer the forces to be transmitted not only to the walls, but also to the webs.

[0030] The inventive method for producing such a chassis link is characterized by first providing a base body with an extruded hollow profile. The hollow profile is intended to have several hollow chambers of different cross-sections created by the extrusions. One of the hollow chambers is used to form a bearing mount. To save material, it is provided that an edge-side hollow chamber is shortened by removing material from the hollow profile to form a first bearing mount.

[0031] A hollow chamber at the edge is particularly suitable for forming a bearing support because it positions the bearing as exposed as possible on the hollow profile. Due to manufacturing constraints, the hollow profile has hollow chambers of uniform length after extrusion. For a bearing support, it is not necessary for the length of the bearing support to correspond to the length of the entire chassis link. Therefore, the plan is to remove material from the edge of the base body in the area of ​​this hollow chamber, thus making the bearing support only as long as necessary. This combines maximum weight savings with a cost-effective manufacturing process.

[0032] The extruded hollow profile is bent into its final shape. As already explained, the hollow profile can be bent after extrusion so that its extrusion axis is no longer straight, but instead curves along the longitudinal axis of the chassis link. Bending into its final shape can occur before and / or after the material is removed from the edges. By bending, a first leg, running in the extrusion direction, can be brought into the desired position. The middle section is followed by the second leg, which is angled to the middle section. The base body is essentially L-shaped with an obtuse angle.

[0033] A second bearing receptacle is formed in the hollow profile, which extends through the base body transversely to the extrusion direction. During material-removing machining, at least one web extending between opposite walls of the hollow profile is removed in the area of ​​the second bearing receptacle. Preferably, two or more webs are removed in the area of ​​the bearing receptacle. The webs serve to improve force transmission from the bearing receptacle to the adjacent areas of the base body. The bearing receptacles can also be slightly widened after punching.

[0034] As a further stiffening measure for the base body, its edges can be bent over, at least in some areas, so that the free ends of the opposing walls face each other. This creates further mutual support for all walls. In addition, the bent walls can be joined together at the ends, particularly by fusion welding.

[0035] Finally, in a further development, a fork-shaped bearing receptacle is formed at a free end region of the second leg. The design is created by the spaced walls. Only edge contouring takes place by machining to remove material. A bearing is connected to the bearing receptacle via at least one connecting element. The bearing can be, for example, a cast component or forged component. Preferably, the fork-shaped bearing receptacle contains several connecting elements that pass through the fork-shaped bearing receptacle, as well as a fastening section of the bearing that engages in the fork-shaped bearing receptacle. In particular, the said components are riveted together. In this case, the connecting elements are rivets.

[0036] The chassis link according to the invention has the advantage that its rigidity can be specifically adjusted using webs of varying thickness. These webs can also be referred to as stiffening ribs. The additional edge-side bending or repositioning of the walls, which can also be referred to as the floor or ceiling of the chassis link, is an important aspect for further increasing rigidity. The bending of the walls occurs particularly in the area of ​​the inner radius of the chassis link, i.e., in the area of ​​the obtuse angle (90° < angle < 180°) at which its two legs are positioned relative to each other.

[0037] A further cost reduction results from the fact that the base body can be used as both a left and right suspension arm. In addition, the modular design makes it possible to connect special bearing components in the area of ​​the forked bearing mount to the suspension arm. In particular, ball joints can be purchased inexpensively and connected to the suspension arm. In particular, the use of separate bearing components enables a mix of materials. The base body, or thus also the forked bearing mount, can be made of aluminum, while the bearing component can be made of steel. Aluminum alloys from the 6000 and 7000 series are particularly used for the base body. With a base body made of these materials, it is possible to press bearings directly into the bearing mounts without the use of additional bearing sleeves.

[0038] The walls and the thinner webs of the base body can each have a thickness of 5-8 mm, while the thickness of one or more webs in the middle section, or in the area of ​​the first leg, is preferably at least 20% greater than the thickness of the thinner web in the second leg. Individual webs can, for example, be 10 mm thick, while the walls are 5-8 mm thick.

[0039] The invention is explained in more detail below using an exemplary embodiment illustrated in schematic drawings. They show: Fig. 1 A perspective view of a chassis link; Fig. 2 A basic body of the chassis link of the Fig. 1 in perspective view; Fig. 3 The basic body of the Fig. 2 in horizontal longitudinal section; Fig. 4 The basic body of the Fig. 2 in a view obliquely from below; Fig. 5 The basic body of the Fig. 3 and Fig. 4 in a side view in the direction of a first bearing axis; Fig. 6 in an enlarged view a detail of the basic body in perspective view and Fig. 7 another embodiment in perspective view.

[0040] The Fig. 1 shows a chassis link 1 in the form of a triangular link. The chassis link 1 comprises a one-piece base body 2 made of the same material. The base body 2 is made of an extruded hollow profile. The illustration of the Fig. 2 shows the base body 2 without attachments. The extruded hollow profile has several hollow chambers 3 to 5 ( Fig. 2). The hollow chamber 3 on the left in the image plane is also designed as a bearing receptacle 6. This bearing receptacle 6 extends through the base body 2. It forms the first bearing receptacle 6. The first bearing receptacle 6 has a first bearing axis L1. This first bearing axis L1 runs parallel to the closed wall of the hollow cylindrical hollow chamber 6. The direction of the bearing axis L1 thus corresponds to the extrusion direction E. To illustrate the (local) extrusion direction, this is drawn near the bearing receptacle 6.

[0041] The base body 2 is essentially L-shaped. It has a central section 7 with the first bearing receptacle 6. A first leg 8 and a second leg 9 adjoin the central section 7. The two legs 8, 9 are at an obtuse angle to each other and have a rounded transition area. Opposite the concavely rounded transition area is the first bearing receptacle 6. A second bearing receptacle 11 is located in a first end section 10 of the first leg 8. The second bearing receptacle 11 extends through the base body 2 ( Fig. 2). It has a bearing axis L2 whose direction deviates from the extrusion direction E.

[0042] In particular, the second bearing axis L2 is perpendicular to the extrusion direction E. The second bearing holder 11 is circular in cross-section.

[0043] The bearing support 11 passes through the base body 2 in the figure from top to bottom, ie from its upper side 12, as shown in Fig. 1 can be seen up to its underside 13, as shown in the Fig. 4. The upper side 12 and the lower side 13 are flat, apart from the hollow chamber 3 which forms the first bearing seat 6. The diameter of this first bearing seat 6 is larger inside and outside than the distance between the upper side 12 and the lower side 13. The base body 2 of the chassis link 1 is therefore predominantly considerably narrower than the extruded first bearing seat 6. Fig. 5 shows in a side view looking towards the first bearing holder 6 that the diameter of the bearing holder 6 is considerably larger than the thickness of the base body 2 in the remaining areas.

[0044] A third bearing receptacle 15 is arranged at a second end section 14, which is located on the second leg 9 at a distance from the central section 7. It has a fork at the end section 14. It is formed by two opposing walls 16, 17, which bound the top side 12 and the bottom side 13 of the chassis link 1, respectively. The walls 16, 17 run parallel to one another. The walls 16, 17 are connected to one another via a first web 18. This web 18 is located at a distance from the outer end of the end section 14, so that the walls 16, 17 continue beyond the web 18 into the region of the end section 14 and thus form the forked bearing receptacle 15.

[0045] The Fig. Figure 1 shows that bearings 19 and 20 are pressed into the bearing receptacles 6 and 11, respectively, and that a bearing 21 is attached to the bearing receptacle 15. These are rubber-metal bearings.

[0046] The bearing 21 on the third bearing receptacle 15 has an arm 22 that engages in the bearing receptacle 15 and is connected there to the walls 16, 17 and thus to the base body 2 via three rivets 23. On the other hand, the arm 22 has a bearing pin 24 at its free end, which is bent relative to the arm 22 and is movably mounted relative to the arm 22 of the bearing 21 via a rubber bearing.

[0047] From a manufacturing point of view, it should be noted that such a chassis link 1 cannot be the result of an extrusion process alone. Fig. To better illustrate the manufacturing process, Figure 3 shows that, in addition to the shorter first web 18, the chassis link 1 has another web 25 adjacent to the bearing mount 15, which begins in the central section 7 and continues into the end section 10 of the first leg 8. This significantly longer web 25 is curved in an arc shape. This is due to the fact that the chassis link 1 was bent after or during extrusion. The extrusion direction of the web 25 still corresponds to the course of the web 25.

[0048] The desired edge contour of the chassis link 1 cannot be achieved exclusively by extrusion. The edge contours of the chassis link 1 were created by material removal, particularly machining. Fig. 3 shows openings 27 in the area of ​​the bearing connection 15 for the passage of connecting elements 23, in particular rivets. Fig. 3 clearly shows that the longer, curved web 25 runs in the area of ​​the second bearing support 11. It intersects the bearing support 11 off-center. The bearing support 11 therefore not only penetrates the respective walls 16, 17, but also the web 25.

[0049] The Fig. 3 further shows that a third web 26 forms the transition to the first bearing receptacle 6. The thickness D1 of this third web 26 is greater than the thickness D2 of the first web 18, which is arranged remote from the central section 7. In addition, the distance between the second and third webs 25 and 26 is smaller than the distance between the first web 18 and the second web 25. As a result, the central hollow chamber 5 ( Fig. 2) is considerably larger in cross-section than the hollow chamber 4 which is adjacent to the first bearing receptacle 6. In the area of ​​the bearing receptacle 6 or in the area of ​​the central section 7, this makes it possible to achieve increased rigidity. In addition, the web 25 runs close to an edge region 28 of the first leg 8. Although it still runs at a certain distance from the edge region 28, it approaches the edge region, particularly in the transition to the central section 7 and also in the area of ​​the first end section 10 with the second bearing receptacle 11. In the central region of the first leg 8, the distance is somewhat increased, which is due to the curved shape, whereas the edge side 28 of the first leg 8 is essentially straight. This edge side 28 can also be referred to as the outer side of the first leg 8. The opposite inner side 29 is curved in an arc.The arched shape transitions smoothly and without jumps from the first leg 8 into the second leg 9. This inner side 29 can also be referred to as the arched side or concave side. If more webs or stiffening ribs are present, a web can also be arranged in the edge region. In this exemplary embodiment, there is no web on this inner side 29, but by bending the outer edge regions 30, 31 on the upper and lower walls 16, 17, the two edge regions 30, 31 are brought closer together. In this exemplary embodiment, both edge regions 30, 31 are bent in the same way. Their opposite, free ends 32, 33 point towards one another. In a manner not shown in detail, these free ends 32, 33 of the walls 16, 17 can be joined together, in particular welded together (. Fig. 6).

[0050] The Fig. Figure 5 shows, in side view, that the two walls 16, 17 are connected to one another across several areas, firstly via the differently thick webs 18, 25, 26, whereby the thinner web 18 can have a thickness D2 of 5 to 8 mm, while at least the thicker web 26 has a greater thickness D1 of approximately 8 to 10 mm. The intermediate web 25 can also have a thickness of 8 to 10 mm. At the same time, the wall thickness of the base body 2 is largely constant with respect to the walls 16, 17. Only in the area of ​​the first bearing receptacle 6 can the wall thickness be significantly reduced, essentially halving it. Thickenings of the walls 16, 17 are located on the outer edge side 28 of the first leg 8 due to compression of the base body 2 when the first leg 8 is bent relative to the second leg 9.

[0051] Such a chassis link 1 can be used for both the left and right side of a motor vehicle. The base body 2 is Fig. 3 is mirror-symmetrical with respect to the top and bottom sides. It can be manufactured cost-effectively by extrusion with subsequent forming and machining. During material-removing machining, in particular the first hollow chamber 3 of the hollow profile is shortened to such an extent that only the above-described first bearing mount 6 remains, which, viewed approximately in the direction of its longitudinal axis L1, has the same length as the bearing mount 15 on the second end section 14 of the second leg 9. Such a chassis link 1 is particularly suitable as a lower wishbone of a McPherson spring axle. The chassis link 1 shown here is made of an aluminum alloy from the 6000 or 7000 series.

[0052] The Fig. Figure 7 shows a perspective view of another embodiment of a chassis link 1. The same reference numerals are used for components that are essentially functionally identical as in the Fig. 1 to 6. Reference is made to the description of the Fig. 1 and Fig. 2, the differences being explained below. In this exemplary embodiment, additional webs 34-37 and the resulting additional hollow chambers are arranged in the chassis link 1. This allows the base body 2 to be significantly stiffened. Since this is an extruded profile, no additional manufacturing step is required to create additional webs 34-37.

[0053] A further difference compared to the first embodiment is that the third bearing support 15 is directly integrated into the chassis link 1, i.e. it is designed as a further opening in the base body 2. The bearing support 15 is oriented in such a way that a bearing 21 with bearing pin 24 does not have to be screwed on using additional connecting means, but can be pressed directly into the base body 2, as shown in the Fig. 7 is shown.

[0054] The Fig. Figure 7 further shows that the thickness of the walls 16, 17 can vary transversely to the extrusion direction. Directly opposite wall sections can be thicker or thinner in some areas. It is also possible for only one of the two walls 16, 17 to have a different thickness in some areas. Reference symbol: 1 chassis link 2 basic bodies 3 hollow chamber 4 hollow chamber 5 hollow chamber 6 first inventory 7 Middle section 8 first leg 9 second leg 10 first end section of 8 11 stock intake in 10 12 Top of 2 13 bottom of 2 14 second end section of 9 15 stock recording at 14 16 upper wall 17 lower wall 18 jetty 19 camps in 6 20 warehouses in 11 21 warehouses at 15 22 arm of 21 23 Connecting element 24 bearing journals of 21 25 jetty 26 jetty 27 Opening in 2 28 margin page of 8 29 inside of 8 30 edge area of ​​17 31 edge area of ​​16 32 free end of 31 33 free end of 30 34 jetty 35 jetty 36 jetty 37 jetty D1 thickness of 26 D2 thickness of 18 E Extrusion direction L1 bearing axis of 6 L2 bearing axis of 11

Claims

[1] Chassis link (1) with a one-piece, uniformly formed base body (2), which is made of an extruded hollow profile with a plurality of hollow chambers (3-5), wherein the base body (2) has at least one bearing receptacle (6, 11, 15) which passes through the base body (2), wherein a first bearing receptacle (6) is formed by one of the hollow chambers (3), wherein the first bearing receptacle (6) has a first bearing axis (L1), the direction of which corresponds to the extrusion direction (E) of the hollow profile forming the first bearing receptacle (6), wherein the base body (2) has a second bearing receptacle (11) in a first end section (10) of the base body (2), which second bearing receptacle has a second bearing axis (L2), wherein the chassis link (1) is designed as a triangular link, with a further bearing receptacle (15) in a second end section (14) of the base body (2), wherein a central section (7) is connected to the first Bearing support (6) between the two end sections (10,14) and wherein the base body (2) has a first leg (8) which extends from the first end section (10) to the middle section (7) and a second leg (9) which extends from the second end section (14) to the middle section (7), , characterized by that the direction of the second bearing axis (L2) deviates from the extrusion direction (E). [2] Chassis link (1) according to claim 1 characterized by that the base body (2) has opposite walls (16, 17) and webs (18, 25, 26, 34-37) connecting the walls (16, 17) to form the hollow chambers (3-5), wherein the webs (18, 25, 26, 34-37) are oriented in the longitudinal direction of the first leg (8) and wherein at least two webs (18, 26) have a different thickness (D1, D2) from one another, [3] Chassis link (1) according to claim 2 characterized bythat at least one web (25) is arranged in the first leg (8) and at least one web (18) is arranged in the second leg (9), wherein the web (25) in the first leg (8) has a greater thickness (D1) than the web (18) in the second leg (9). [4] Chassis link (1) according to claim 3 characterized by that at least one web (25) in the first leg (8) is arranged in an edge region (28) of the first leg (8). [5] Chassis link (1) according to one of claims 2 to 4, characterized by that the opposite walls (16, 17) of the base body (2) are bent at least partially in their edge regions (30, 31) so that the free ends (32, 33) of the walls (16, 17) point towards each other. [6] Chassis link (1) according to claim 5, characterized by that the free ends (32, 33) of the mutually bent edge regions (30, 31) of the walls (16, 17) are joined together. [7] Chassis link (1) according to one of claims 1 to 6, characterized by that the second bearing receptacle (11) passes through the base body (2), wherein the course of at least one web (25) in the base body (2) is interrupted by the bearing receptacle (11). [8] Method for producing a chassis link (1), wherein a base body (2) is provided from an extruded hollow profile with a plurality of hollow chambers (3-5) of different cross-section produced by the extrusion, characterized byin that an edge-side hollow chamber (3) is shortened by removing material from the hollow profile to form a first bearing receptacle (6), the extruded hollow profile being bent into its final shape and material being machined to remove the edge, so that a first leg (8) running in the extrusion direction is formed, to which a central section (7) adjoins, and a second leg (9) running transversely or at an obtuse angle to the extrusion direction (E) is formed and adjoins the central section (7), a second bearing receptacle (11) being formed in the hollow profile, the second bearing receptacle (11) passing through a base body (2) formed by the hollow profile transversely to the extrusion direction (E), at least one web (25) extending between opposite walls (16, 17) of the hollow profile being removed in the region of the second bearing receptacle (11). [9] Method according to claim 8, characterized bythat the opposite walls (16, 17) of the base body (2) are bent at least partially in its edge regions (30, 31) so that the free ends (32, 33) of the walls (16, 17) point towards each other. [10] Method according to claim 9 characterized by that the edge regions (30, 31) of the walls (16, 17) which are bent towards one another are joined together at the end faces. [11] Method according to claim 10, characterized by that a fork-shaped bearing receptacle (15) is formed on a free end region (14) of the second leg (8) by machining the hollow profile to remove material, wherein a bearing (21) is connected to the fork-shaped bearing receptacle (15) via at least one connecting element (23).

Images