Assembly for a car body

Abstract

The invention relates to an assembly (2) for a motor vehicle body (3), comprising a longitudinal member (4) having a U-profile (6), which has a base wall (7) with an upper side (9) facing upwards in the vehicle vertical direction (8) and two side walls (10, 11) adjoining the base wall (7) on both sides in the vehicle transverse direction (5) and projecting from the base wall (7), comprising a threaded bushing (14) provided for fastening a chassis component (1), which is fastened on the upper side (9) to the base wall (7), and comprising a bulkhead element (16) having a U-profile (17), which is arranged on the upper side (9) and is welded to the base wall (7), wherein the side walls (10, 11) are supported on one another via the bulkhead element (16) in the vehicle transverse direction (8), and the bulkhead element (16) and the side walls (10,11) together form a housing (19) that completely surrounds the threaded bushing (14) in its circumferential direction (18).

Description

[0001] The invention relates to an assembly for a motor vehicle body according to claim 1.

[0002] Assemblies for motor vehicle bodies are already well known in the general state of the art. Chassis components, such as a rear axle or an axle support intended for the rear axle, can be mounted to body structures, for example, using screws. Body-mounted screw-in bushings, also known as threaded bushings, can be used for this purpose. These can be connected to longitudinal structural components and / or transverse structural components of the assembly, whereby such an assemblage can be additionally stiffened using so-called bulkhead plates. To meet operating loads and rigidity requirements, multiple bulkheads can typically be used.In the interaction between the body and the bearings, for example rubber bearings, of the vehicle axle, a particularly rigid body structure, in particular a particularly rigid axle mount, can be desirable with regard to driving dynamics, comfort and acoustics.

[0003] Furthermore, DE 196 37 241 A1 discloses a support for a motor vehicle, with at least one connection point for a motor vehicle component, wherein the support has an open section at least in the region of the connection point, into which a force absorption node can be inserted and fastened, the force absorption node has a connection point designed as a core for the motor vehicle component and webs extend from the core to at least two sections serving as force distribution surfaces and connecting plates with flanges are fastened to the sections, which lie against the corresponding walls of the support and are fastened there.

[0004] In addition, DE 10 2008 038 079 A1 discloses a fastening arrangement for at least one force-absorbing element on a support of a motor vehicle.

[0005] The object of the invention is to provide an assembly for a motor vehicle body so that a chassis component can be connected to the motor vehicle body in a particularly rigid manner.

[0006] This object is achieved according to the invention by an assembly for a motor vehicle body having the features of patent claim 1. Advantageous embodiments of the invention are the subject of the dependent patent claims and the description.

[0007] A first aspect of the invention relates to an assembly for a motor vehicle body. The motor vehicle body, particularly in its fully manufactured state, preferably comprises the assembly. The motor vehicle body is understood to be a body, for example a self-supporting one, of a motor vehicle or of the motor vehicle. The motor vehicle is designed, for example, as a passenger car.

[0008] The assembly has at least one longitudinal member having a U-profile. This means that the longitudinal member, in particular a cross-section of the longitudinal member, is designed as a U-profile, i.e. is shaped according to a U-profile. The longitudinal member has a base wall with an upper side facing upwards in the vertical direction of the vehicle, in particular when the assembly is installed in the motor vehicle body or in the motor vehicle. This means that the upper side of the base wall faces upwards in the vertical direction of the vehicle. Furthermore, the longitudinal member has two side walls adjoining the base wall on both sides, in particular directly, in the transverse direction of the vehicle, in particular when the assembly is installed in the motor vehicle body or in the motor vehicle.In other words, a first of the side walls is arranged on a first side of the base wall, and the second of the side walls is arranged on a second side of the base wall that is different from the first side, wherein the sides are different sides, in particular sides facing away from one another, with respect to the vehicle transverse direction. The side walls protrude, in particular obliquely or perpendicularly, from the base wall. In other words, the side walls extend obliquely or perpendicularly to the base wall. Thus, the side walls form, in particular, a respective side part of the U-profile, and the base wall forms a lower part of the U-profile, wherein this lower part can also be referred to as the base part.

[0009] The assembly has at least one threaded bushing provided or designed for fastening at least one chassis component. In other words, the chassis component can be fastened or is fastened to the threaded bushing, in particular via a screw connection. Thus, the chassis component can be fastened to the threaded bushing, in particular via the screw connection. The chassis component is, for example, an axle carrier, in particular a rear axle carrier. The axle carrier can also be referred to as a subframe, assembly carrier, or subframe. A vehicle axle, in particular a rear axle, of the motor vehicle can be connected to the assembly via the axle carrier, in particular via the threaded bushing, and can thereby be linked to the assembly.The threaded bushing is attached to the top side of the base wall, in particular directly, for example by means of at least one welded connection. Thus, the threaded bushing is welded to the base wall, for example, in particular by spot welding, preferably by laser welding.

[0010] Furthermore, the assembly comprises at least one bulkhead element having a U-shaped profile, which can also be referred to as an intermediate element. In other words, the bulkhead element, in particular a cross-section of the bulkhead element, is designed as a U-shaped profile, i.e., shaped according to a U-shaped profile. The bulkhead element is arranged on the upper side of the base wall and, in particular, directly welded to the base wall, preferably by laser welding. In other words, the longitudinal member, in particular the side walls and the base wall, delimits a receiving space in which the bulkhead element is arranged.

[0011] In order to be able to connect the chassis component to the motor vehicle body in a particularly rigid manner, in particular in a particularly weight-efficient manner, it is provided that the side walls are supported on one another in the transverse direction of the vehicle, in particular directly, via the bulkhead element, in particular in the installed position of the assembly in the motor vehicle body or the motor vehicle, and the bulkhead element and the side walls together form a housing that completely surrounds the threaded bushing at least in some areas, in particular predominantly or completely, in its circumferential direction.In other words, the side walls of the longitudinal member are located via the bulkhead element in, in particular direct, support in the transverse direction of the vehicle, wherein the threaded bushing is covered by the bulkhead element and the side walls of the longitudinal member together on both sides in the vehicle longitudinal direction and on both sides in the vehicle transverse direction, in particular completely in the circumferential direction of the threaded bushing. The fact that the housing completely surrounds the threaded bushing in its circumferential direction can be understood in particular to mean that the housing completely surrounds the threaded bushing in its circumferential direction. This means that the housing extends once, in particular completely, around the threaded bushing in the circumferential direction of the threaded bushing. The housing can thus be understood to mean a housing provided for the threaded bushing. This means that the threaded bushing is located, in particular completely, within the housing.

[0012] The bulkhead element can thus be used to create the housing, which can also be referred to as a cage bulkhead, which geometrically encloses the threaded bushing, also simply referred to as a bushing. The housing can significantly increase the rigidity of the assembly in the connection area of ​​the chassis component to the assembly or to the vehicle body. This can particularly improve the rigidity of a connection node around the threaded bushing. Furthermore, the bulkhead element or the housing can keep the number of parts in the assembly particularly low, which has a positive effect on the weight of the assembly. The number of parts and / or weight of the assembly or of the vehicle body can therefore be particularly low.By increasing the rigidity, the mechanical load-bearing capacity of the assembly can also be significantly increased, which can, for example, significantly improve the load path in the event of a rear-end crash. The described arrangement and housing of the threaded bushing makes it possible to distribute operating loads particularly effectively into designated load paths in the assembly, also known as the body structure, and to create the highest possible connection rigidity for the chassis components in order to counteract excitations and vibrations that can be introduced into the body by the vehicle axle, especially the rear axle. This allows a particularly advantageous design of the body structure for accommodating chassis components.

[0013] Furthermore, it is provided that the bulkhead element is connected to the threaded bushing on a side of the threaded bushing facing away from the base wall of the longitudinal member by means of a welded connection, in particular by means of a laser welded connection, i.e. by means of at least one welded connection, for example by means of a third welded connection, for example directly. In other words, the welded connection by means of which the bulkhead element is welded to the threaded bushing is arranged on a side of the threaded bushing facing away from the base wall of the longitudinal member, i.e. for example on the side of the base wall pointing upwards in the vertical direction of the vehicle. Furthermore, the bulkhead element or the threaded bushing has at least one elevation formed separately from this welded connection, i.e. from the welded connection arranged on the side of the threaded bushing facing away from the base wall.This means that no welded connection, in particular no weld seam, is or will be formed by this elevation. The bulkhead element rests on the side of the threaded bushing facing away from the base wall, in particular directly, against the threaded bushing. In other words, the bulkhead element is supported on the threaded bushing via the elevation, for example downwards in the vertical direction of the vehicle, in particular directly. The elevation, which can also be referred to as a "dimple", can thus enable a defined distance between the threaded bushing and the bulkhead element, in particular a sheet of the bulkhead element, in particular before the welded connection is formed, by means of which reliable laser welding can be achieved.For laser welding, the defined distance between the components to be welded is advantageous because this distance can serve for degassing, i.e. as a degassing channel, of evaporating substances during laser welding. The distance can also be referred to as a gap. This elevation can be arranged in the bulkhead element, which can also be referred to as a bulkhead plate. Alternatively, it is conceivable that this elevation, which can also be referred to as a spacer dimple, is arranged in the threaded bushing, for example rotationally symmetrically, and that the sheet metal of the bulkhead element is flat, for example. This can achieve the same effect, so to speak. The elevation thus allows the bulkhead element and the threaded bushing to be welded together in a particularly reliable and, in particular, particularly inexpensive manner.This makes it possible to significantly improve the manufacturing quality of the assembly, particularly in a particularly low-cost manner.

[0014] In a further embodiment, the bulkhead element completely surrounds or runs around a central axis of the threaded bushing, which runs in the axial direction of the threaded bushing, in the circumferential direction of the threaded bushing. In other words, the bulkhead element extends in the circumferential direction of the threaded bushing around the central axis, in particular completely, with the central axis running parallel to the axial direction of the threaded bushing. This allows the threaded bushing to be particularly well enclosed by the bulkhead element, which can significantly increase the rigidity in the area of ​​the chassis component connection.

[0015] In a further embodiment, it is provided that an axial direction of the U-profile of the longitudinal member and an axial direction of the U-profile of the bulkhead element run obliquely or perpendicular to one another. In other words, the longitudinal member, in particular the U-profile of the longitudinal member, and the bulkhead element, in particular the U-profile of the bulkhead element, extend obliquely or perpendicular to one another. In other words, the U-profiles of the longitudinal member and the bulkhead element are arranged rotated relative to one another, for example about a vertical axis of the motor vehicle body or of the motor vehicle running in the vehicle's vertical direction. As a result, transverse loads running in the vehicle's transverse direction, for example, can be supported particularly well via the side walls with the aid of the bulkhead element, whereby the mechanical load-bearing capacity of the assembly can be particularly increased.This allows the chassis component to be connected to the vehicle body in a particularly rigid manner.

[0016] In a further embodiment, it is provided that the bulkhead element is constructed in several parts, in particular in two parts. In other words, the bulkhead element has at least two, for example exactly two, bulkhead element parts that are formed separately from one another and connected to one another. As a result, the bulkhead element or the housing can lie particularly tightly against the threaded bushing, in particular over a large area, because the multi-part design, in particular in two parts, allows manufacturing tolerances to be maintained with particularly little effort. The tight housing allows a particularly good supporting effect of the threaded bushing on the bulkhead element to be achieved. Furthermore, the bulkhead element can be connected to the threaded bushing particularly firmly, for example by welding, preferably by laser welding. The mechanical load-bearing capacity of the motor vehicle body can thus be particularly increased in a particularly low-cost manner.In particular, the manufacturing costs of the assembly or the vehicle body can be kept particularly low.

[0017] In a further embodiment, it is provided that the bulkhead element and the threaded bushing are or will be connected to each other, for example directly, by means of laser welding, spot welding, and / or wobble riveting. This means that the bulkhead element is or will be attached to the threaded bushing, in particular by means of laser welding, spot welding, and / or wobble riveting. This allows the threaded bushing to be particularly well supported on the bulkhead element, which can significantly improve the mechanical load-bearing capacity of the assembly in the area of ​​the threaded bushing.

[0018] Particularly preferred is connecting the bulkhead element and the threaded bushing by means of laser welding. This embodiment is based in particular on the knowledge that with a conventional spot-welded connection, there may be a risk of corrosion on bearing screw-on surfaces due to the weld spots. For example, spot welding can burn a zinc layer arranged on the base wall, which is particularly designed as a sheet metal. Since the zinc layer, which can also be referred to as a zinc coating, can usually be provided as a corrosion protection layer on the base wall, in particular on the longitudinal member, the risk of corrosion can be particularly increased if the zinc layer is damaged. This risk of corrosion can be particularly minimized by laser welding. The durability of the assembly can thus be particularly improved.In this embodiment, the multi-part design, in particular the two-part design, of the bulkhead element is also particularly preferred, because the multi-part design allows the tolerances required for laser welding between the threaded bushing and the bulkhead element to be maintained particularly well, in particular in a particularly low-cost manner.

[0019] In a further embodiment, it is provided that the threaded bushing is or will be welded, in particular directly, to the base wall of the longitudinal member, preferably by means of laser welding. In other words, the threaded bushing is fastened, in particular directly, preferably by means of laser welding, to the base wall of the longitudinal member. Alternatively or additionally, the bulkhead element is or will be welded, for example, in particular directly, to the side walls of the longitudinal member, preferably by means of laser welding. This means that the bulkhead element is or will be fastened, in particular directly, to the side walls by welding, preferably by means of laser welding. Alternatively or additionally, it is provided, for example, that the bulkhead element is or will be welded, in particular directly, to the base wall of the longitudinal member, preferably by means of laser welding.This means that the bulkhead element is or will be attached, in particular directly, to the base wall of the longitudinal member by welding, preferably by laser welding. Welding, in particular laser welding, can create a particularly strong connection between the threaded bushing and the base wall, or between the bulkhead element and the side walls, or between the bulkhead element and the base wall, which can significantly increase the mechanical load-bearing capacity of the assembly.

[0020] In a further embodiment, it is provided that the threaded bushing has a round, in particular circular, cross-section. In other words, the threaded bushing, for example a shank of the threaded bushing, is round at least in some regions. This allows the threaded bushing to be manufactured with particularly little effort. In particular, the geometric complexity of the threaded bushing, also referred to as the axle bushing, can thus be kept particularly low, whereby the weight of the threaded bushing and / or costs, in particular manufacturing costs, of the threaded bushing can be kept particularly low. The round cross-section of the threaded bushing can be particularly advantageous in conjunction with laser welding, since flat contact surfaces for bulkhead spot welds are no longer required on the sides during laser welding.Preferably, the threaded bushing is designed to be completely rotationally symmetrical, whereby the manufacturing complexity of the threaded bushing can be particularly reduced.

[0021] In a further embodiment, it is provided that the bulkhead element and the threaded bushing are or will be welded to one another, in particular directly, on three different, i.e., mutually different, sides of the threaded bushing. In other words, at least three welded joints, in particular laser-welded joints, are provided, via which the bulkhead element and the threaded bushing are welded to one another, in particular directly, wherein a first of the welded joints is arranged on a first side of the threaded bushing, a second of the welded joints is arranged on a second side of the threaded bushing, and the third of the welded joints is arranged on the third side of the threaded bushing.The first side is, for example, a side facing forward in the vehicle's longitudinal direction, the second side is, for example, a side facing rearward in the vehicle's longitudinal direction, and the third side is, for example, a side of the threaded bushing that points upwards in the vehicle's vertical direction. This allows the bulkhead element to be attached to the threaded bushing particularly securely. Weld seams, in particular laser weld seams, can thus extend between the bulkhead element and the bushing, for example, at the top in the vehicle's vertical direction and on the sides of the threaded bushing facing forwards and rearwards in the vehicle's longitudinal direction. These welded connections can particularly improve the rigidity of the connection between the chassis component and the vehicle body.

[0022] In a further embodiment, at least one cross member formed separately from the longitudinal member and the bulkhead element is arranged on the first side wall of the longitudinal member on a side of the first side wall facing away from the bulkhead element, at least partially overlapping with the bulkhead element. In other words, the bulkhead element is covered, for example in the vehicle transverse direction, in particular inwards, at least partially, in particular predominantly or completely, by the cross member, in particular through the mediation of the first side wall of the longitudinal member. Furthermore, the cross member and the bulkhead element are supported on one another via the first side wall in the vehicle transverse direction, in particular directly. This means that the cross member and the bulkhead element are in mutual support in the vehicle transverse direction via the first side wall.Thus, in particular, the first side wall is arranged between the cross member and the bulkhead element in the vehicle's transverse direction. As a result, the cross member and the bulkhead element can be supported on one another via the first side wall in the vehicle's transverse direction in such a way that walls of the bulkhead element, referred to in particular as flanks, and walls of the cross member, referred to in particular as flanks, are aligned with one another. This ensures that forces running in the vehicle's transverse direction (Y-forces) can be cleanly transmitted from the threaded bushing and / or the bulkhead element into the cross member. This can significantly increase the mechanical load-bearing capacity of the assembly. The flanks of the bulkhead element can also be referred to as "cage bulkhead flanks." The flanks of the cross member can also be referred to as "cross member flanks."

[0023] Also disclosed is an arrangement, in particular a fastening arrangement, of the chassis component on the assembly according to the invention, in particular on the longitudinal member of the assembly. Advantages and advantageous embodiments of the assembly according to the invention are to be regarded as advantages and advantageous embodiments of the arrangement, and vice versa.

[0024] A further aspect relates to a method for producing the assembly and / or for producing the arrangement and / or for producing the motor vehicle comprising the assembly. Advantages and advantageous embodiments of the invention are to be regarded as advantages and advantageous embodiments of the further aspect, and vice versa.

[0025] Further features of the invention emerge from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown alone in the figures, can be used not only in the respective specified combination, but also in other combinations or on their own.

[0026] The invention will now be explained in more detail using a preferred embodiment and with reference to the drawings. They show: Fig. 1 is a schematic bottom view of an arrangement of a chassis component on a motor vehicle body assembly according to the invention; and Fig. 2 is a schematic and perspective partial view of an assembly according to the invention; and Fig. 3 is a schematic partial sectional view of an assembly according to the invention; and Fig. 4 is a schematic perspective view of a threaded bushing of an assembly according to the invention; and Fig. 5 is a schematic partial sectional view of an arrangement of a chassis component on a motor vehicle body assembly according to the invention; and Fig. 6 is a schematic and perspective partial view of an assembly according to the invention according to a further embodiment; and Fig. 7 is a schematic partial sectional view of the assembly according to the embodiment of Fig. 6; and Fig. 8 is a further schematic partial sectional view of the assembly according to the embodiment of Fig. 6; and Fig. 9 is a further schematic partial sectional view of the assembly according to the embodiment of Fig. 6; and Fig. 10 is a schematic and perspective partial sectional view of an assembly according to the invention according to a further embodiment; and Fig. 11 is a schematic partial sectional view of an assembly according to the invention according to a further embodiment; and Fig. 12 is a schematic partial sectional view of an assembly according to the invention according to a further embodiment; and Fig. 13 is a schematic and perspective partial view of an assembly according to the invention according to a further embodiment; and Fig. 14 is a schematic and perspective partial view of an assembly according to the invention according to a further embodiment; and

[0027] In the figures, identical or functionally identical elements are provided with the same reference symbols.

[0028] Fig. 1 shows, in a schematic and perspective bottom view, an arrangement of a chassis component 1 on an assembly 2 for a motor vehicle body 3. The assembly 2 is designed, for example, as the rear section of the motor vehicle body 3. In the exemplary embodiment, the chassis component 1 is an axle support, in particular a rear axle support. In the present case, the chassis component 1 is arranged, in particular held, on a side of the assembly 2 facing downward in the vehicle's vertical direction 8.

[0029] The assembly 2 has at least one longitudinal member 4, which in this case is designed as a rear or tail-side longitudinal member. In the exemplary embodiment, the assembly has two such longitudinal members 4, which are spaced apart from one another in the vehicle transverse direction 5. As shown in Fig. As can be seen in Figure 1, the longitudinal members 4 are arranged in the vehicle transverse direction 5 on different sides of the assembly 2 or the vehicle body 3. The longitudinal members 4 can be constructed identically. However, only one of the longitudinal members 4 will be described in more detail below by way of example, although these configurations can apply to both longitudinal members 4.

[0030] Fig. Figure 2 shows the assembly 2, in particular the longitudinal member 4, in a schematic and perspective partial view. As in Fig. 2, the longitudinal member 4 has a U-profile 6. The longitudinal member 4 has a base wall 7 which has an upper side 9 facing upwards in the vehicle vertical direction 8. Furthermore, the longitudinal member 4 has two side walls 10, 11 which adjoin the base wall 7 on both sides in the vehicle transverse direction 5, in particular directly, and protrude from the base wall 7, in particular obliquely or vertically. Thus, in the present case, a first of the side walls 10 adjoins the base wall 7 on a first side of the longitudinal member 4 or the base wall 7, in particular directly, in the vehicle transverse direction 5, and the second of the side walls 11 adjoins the base wall 7 on a side of the longitudinal member 4 or the base wall 7 facing away from the first side in the vehicle transverse direction 5, and the second of the side walls 11 adjoins the base wall 7, in particular directly, in the present case.Thus, the U-profile 6 of the longitudinal member 4 is formed by the base wall 7 and the side walls 10, 11. As also shown in . Fig. 2, the longitudinal member 4 has a main extension direction that runs at least substantially in the vehicle's longitudinal direction 12. An axial direction 13 of the U-profile 6 of the longitudinal member 4 preferably runs at least substantially in the vehicle's longitudinal direction 12. A main extension direction of the longitudinal member 4 preferably runs at least substantially in the vehicle's longitudinal direction 12.

[0031] Fig. 3 shows the assembly 2 and in particular the longitudinal member 4, in a schematic partial sectional view. The assembly 2 has at least one threaded bushing 14 provided for fastening the chassis component 1, which is fastened, in particular directly, to the upper side 9 of the base wall 7. Thus, the threaded bushing 14 is arranged or received in a receiving space 15 which is delimited by the base wall 7 and the side walls 10, 11 or formed by the base wall 7 and the side walls 10, 11. The chassis component 1 can be screwed or is screwed to the assembly 2 or the motor vehicle body 3 via the threaded bushing 14, in particular directly. Thus, for example, at least one screw element is provided, by means of which the chassis component 1 can be screwed or is screwed to the threaded bushing 14. The screw element is designed, for example, as a screw.The threaded bushing 14 preferably has an internal thread. The screw element preferably has an external thread.

[0032] As in Fig. 1, a corresponding threaded bushing 14 for fastening the chassis component 1 can be provided in both longitudinal members 4. A respective rear fastening point 14a for the chassis component 1, relative to the vehicle longitudinal direction 12, can be formed by the respective threaded bushing 14. In addition, at least one respective front fastening point 14b, arranged in front of the rear fastening point 14a in the vehicle longitudinal direction 12, can be provided for fastening the chassis component 1 to the motor vehicle body 3, in particular to the assembly 2.

[0033] At least one bulkhead element 16 is arranged or accommodated in the longitudinal member 4, in particular in the aforementioned receiving space. The bulkhead element 16 has a U-profile 17. The bulkhead element 16 is arranged on the upper side 9 of the base wall 7 and welded to the base wall 7, for example by laser welding.

[0034] In order to be able to connect the chassis component 1 particularly rigidly to the assembly 2 or the motor vehicle body 3, the side walls 10, 11 are supported on one another via the bulkhead element 16 in the vehicle transverse direction 5, in particular directly, and the bulkhead element 16 and the side walls 10, 11 together form a housing 19 that completely surrounds or encircles the threaded bushing 14 in its circumferential direction 18. In other words, the bulkhead element 16 and the side walls 10, 11 of the longitudinal member 4 delimit or form a receiving area 20, in particular referred to as a receiving space, in which the threaded bushing 14 is arranged or received, in particular completely. As in Fig. 2 and Fig. 3, the bulkhead element 16 extends at least on a side 20 of the threaded bushing 14 facing forward in the vehicle longitudinal direction 12 and on a side 22 of the threaded bushing 14 facing rearward in the vehicle longitudinal direction 12. This enclosure 19 allows the chassis component 1 to be connected to the motor vehicle body 3 or the assembly 2 in a particularly stable, in particular particularly rigid, manner via the threaded bushing 14. The mechanical load-bearing capacity of the assembly 2 or the motor vehicle body 3 can thus be particularly increased.

[0035] As can be seen from Fig. 2 and Fig. 3, in the exemplary embodiment, the bulkhead element 16 completely surrounds or runs around a central axis 24 of the threaded bushing 14, which runs in the axial direction 23 of the threaded bushing 14, in the circumferential direction 18 of the threaded bushing 14. As a result, the bulkhead element 16 can extend not only on the side 21 pointing forward in the vehicle longitudinal direction 12 and the side 22 pointing rearward in the vehicle longitudinal direction 12, but also on the side of the threaded bushing 14 pointing inwards and outwards in the vehicle transverse direction 5, whereby the bulkhead element 16, for example viewed from above in the vehicle vertical direction 8, can extend completely along the circumferential direction 18 of the threaded bushing 14, that is to say completely, around the threaded bushing 14 or its central axis 24. As also shown in Fig. As can be seen in Figure 2, in the exemplary embodiment, the axial direction 13 of the U-profile 6 of the longitudinal member 4 and an axial direction 23 of the U-profile 17 of the bulkhead element 16 run obliquely or perpendicular to one another. In this case, the U-profile 6 or the longitudinal member 4 is open upwards in the vehicle's vertical direction 8, and the bulkhead element 16 or the U-profile 17 is open downwards in the vehicle's longitudinal direction 12. This allows the mechanical load-bearing capacity of the assembly 2 to be significantly increased.

[0036] In the exemplary embodiment, the threaded bushing 14 is welded, in particular directly, to the base wall 7 of the longitudinal member 4, preferably by means of laser welding. A weld seam 26, via which the threaded bushing 14 is connected to the base wall 7 of the longitudinal member 4, is in Fig. 3. This weld seam 26 is preferably a laser weld seam. The weld seam 26 is preferably circular, which in Fig. 4, in which the threaded bushing 14 is shown in a schematic perspective view. Thus, the threaded bushing 14 can be connected to the base wall 7 of the longitudinal member 4 at the bottom relative to the vehicle vertical direction 8, i.e., to its underside, by circular laser welding. Thus, it is particularly provided that the threaded bushing 14 is mounted in the longitudinal member 4, which is designed as a U-profile 6, in particular directly, via welding, preferably by means of laser welding.

[0037] Furthermore, in the exemplary embodiment, the bulkhead element 16 and the threaded bushing 14 are connected to one another, in particular directly, wherein this connection is preferably effected by laser welding. For this purpose, a plurality of weld seams 27, 28, 29 are provided, via which the bulkhead element 16 and the threaded bushing 14 are welded to one another. These weld seams 27, 28, 29 are preferably laser weld seams. To distinguish them from the weld seam 26, the weld seam 27 is referred to as the second weld seam, the weld seam 28 as the third weld seam, and the weld seam 29 as the fourth weld seam. As in Fig. 3, in the present case the second weld seam 27 is arranged on the side 21 of the threaded bushing 14 facing forward in the vehicle longitudinal direction 12. The side 21 can also be referred to as the first side of the threaded bushing 14. Furthermore, in the present case the third weld seam 28 is arranged on the side 22 of the threaded bushing 14 facing rearward in the vehicle longitudinal direction 12. The side 22 can also be referred to as the second side of the threaded bushing 14. Furthermore, in the present case the fourth weld seam 29 is arranged on a side 30 of the threaded bushing 14 facing upward in the vehicle vertical direction 8. This means that the threaded bushing 14 is or will be welded to the bulkhead element 16 on the side 30, also referred to as the top side of the threaded bushing 14, that is to say in particular on a shaft end of the threaded bushing 14, preferably by laser welding. The side 30 can also be referred to as the third side of the threaded bushing 14.Thus, in the present case, the bulkhead element 16 and the threaded bushing 14 are welded to the threaded bushing 14 on the three mutually different sides 21, 22, 30 of the threaded bushing 14. At least one of the weld seams 27, 28 is designed, for example, as a slot weld, which is shown in . Fig. 2 is illustrated by way of example for the third weld seam 28. Thus, the bulkhead element 16 has, for example, an elongated hole, via which the bulkhead element 16 is welded to the threaded bushing 14, in particular by the second or third weld seam 27, 28. As in Fig. 4, the fourth weld seam 29 can be circular. This allows the threaded bushing 14 to be laser-welded to the bulkhead element 16 from above in a circular manner in the vertical direction 8 of the vehicle. Alternatively, the fourth weld seam 29 can be designed as a slot weld. In the present case, the first weld seam 26 is formed on one end of the threaded bushing 14 in the axial direction 23 of the threaded bushing 14, and the fourth weld seam 29 is formed on the other end of the threaded bushing 14 in the axial direction 23. Instead of the connection by laser welding, it can alternatively be provided that the bulkhead element 16 and the threaded bushing 14 are connected to one another by spot welding or wobble riveting.

[0038] Furthermore, the exemplary embodiment provides for the bulkhead element 16 to be welded to the side walls 10, 11 of the longitudinal member 4 and / or to the base wall 7 of the longitudinal member 4, preferably by laser welding. Thus, the bulkhead element 16 can be welded to the longitudinal member 4, in particular to its base wall 7, in front of and behind the threaded bushing 14, i.e., on sides 21 and 22, with respect to the vehicle's longitudinal direction 12, preferably by laser welding. Furthermore, the bulkhead element 16 can be welded to the side walls 10, 11, which can also be referred to as longitudinal member flanks, in the vehicle's transverse direction, i.e., for example, to the left and right, of the threaded bushing 14, preferably by laser welding.

[0039] For example, in Fig. 2 and Fig. 3, it is particularly preferably provided that the bulkhead element 16 is formed in multiple parts, in particular in two parts. Thus, the bulkhead element 16 in the present case has the first bulkhead element part 31 and a second bulkhead element part 32 formed separately from the first bulkhead element part 31, wherein the bulkhead element parts 31, 32 are connected to one another, in particular directly. For example, the bulkhead element parts 31, 32 are fastened to one another, in particular directly. In particular, the U-profile 17 is or will be formed by both bulkhead element parts 31, 32. In the exemplary embodiment, a first of the bulkhead element parts 31 extends on the side 21 of the threaded bushing 14 facing forward in the vehicle longitudinal direction 12 and on the side 30 of the threaded bushing 14 facing upward in the vehicle vertical direction 8. Furthermore, the second bulkhead element part 32 extends on the side 22 of the threaded bushing 14 facing rearward in the vehicle longitudinal direction 12.Thus, in the present case, the second bulkhead element part 32 is arranged behind the threaded bushing 14 in the vehicle longitudinal direction 12 and the first bulkhead element part 31 extends at least partially further forward in the vehicle longitudinal direction 12 than the threaded bushing 14. For example, the first bulkhead element part 31 is welded to the threaded bushing 14 via the second weld seam 27 and / or via the fourth weld seam 29. Furthermore, the second bulkhead element part 32 is welded to the threaded bushing 14, for example, via the third weld seam 28. Furthermore, in the present case, the first bulkhead element part 31 is related to the base wall 7 via a fifth weld seam 33, in particular a laser weld seam, and / or the second bulkhead element part 32 is welded to the base wall 7 via a sixth weld seam 34. In . Fig. 3, a corresponding section through the weld seams 26, 29, 33, 34 is illustrated by points provided with the reference numerals 26, 29, 33 and 34.

[0040] Due to the two-part design of the bulkhead element 16, the bulkhead element 16 can be welded to the threaded bushing 14, particularly in a particularly low-cost manner, using laser welding. This allows, for example, additional options for connecting the threaded bushing 14 to the bulkhead element 16, particularly using the aforementioned elongated hole welding. The two-part design allows for particularly reliable compliance with the tolerances required for laser welding, particularly while minimizing manufacturing costs.

[0041] Fig. Figure 5 shows the arrangement of the chassis component 1 on the assembly 2 or the vehicle body 3 in a schematic partial sectional view to illustrate a force introduction into the longitudinal member 4 in the event of a rear-end collision. An accident-related force acting on the longitudinal member 4 in the event of a rear-end collision is shown in Fig. 5 is illustrated by an arrow 35. Because the threaded bushing 14 is seated, in particular directly, on or at the longitudinal member 4, a particularly optimized load path can be achieved in the event of a rear-end impact. Force can be introduced from the longitudinal member 4 or the threaded bushing 14 directly into the chassis component 1, in particular into the rear axle. The load path can be kept free of offsets, and the number of parts through which the force or load path passes in the event of a rear-end impact can be kept particularly low. The mechanical load-bearing capacity of the motor vehicle body 3 can thus be particularly improved.

[0042] In the Fig. 6 to 9 illustrate an alternative embodiment to the multi-part design of the partition element 16, wherein in this alternative embodiment, the partition element 16 is formed in one piece. The corresponding housing 19 can therefore also be formed by a one-piece design of the partition element 16. Fig. 6, the assembly 2 or the longitudinal member 4 and the bulkhead element 16 is shown in a schematic and perspective partial view. Fig. 7 to Fig. 9 show the assembly 2, in particular the longitudinal member 4 and the bulkhead element 16 and the threaded bushing 14, in a respective schematic partial sectional view, wherein in Fig. 7 a section perpendicular to the vehicle longitudinal direction 12 (X-section), in Fig. 8 a section perpendicular to the vehicle transverse direction 5 (Y-section) and in Fig. 9 shows a section (Z-section) running perpendicular to the vehicle vertical direction 8. In Fig. 7 and Fig. 9 further welded joints 36, 37 are illustrated, via which the bulkhead element 16 is welded, in particular directly, to the side walls 10, 11 of the longitudinal member 4.

[0043] In order to keep the manufacturing costs of the assembly 2 or the motor vehicle body 3 particularly low, it is provided in the exemplary embodiment that the threaded bushing 14 has a round, in particular circular, cross-section. This is, for example, in Fig. 4. This design is possible, among other things, because the corresponding laser-welded connections eliminate the need for flat contact surfaces, as would be necessary, for example, with a spot welding process. Furthermore, a base flange of the threaded bushing 14 can be dimensioned particularly small, which can be referred to in particular as a "reduced base flange." This is also particularly advantageous in conjunction with the aforementioned laser welding, since, for example, spot welding is no longer necessary. This allows the weight of the threaded bushing 14 to be kept particularly low.

[0044] Both in the two-part embodiment of the threaded bushing 14 and in the one-part embodiment of the threaded bushing 14, the chassis component 1 can be connected to the longitudinal member 4 in a particularly load-efficient manner, whereby, for example, a torque can be introduced from the chassis component 1, for example via a rear axle screw or a screwed-on rear axle bearing, into the threaded bushing 14. Such a torque is in Fig. 3, Fig. 7 and Fig. 8 is illustrated by way of example by means of an arrow 38.

[0045] Furthermore, in the exemplary embodiment, the longitudinal member 4, in particular the U-profile 6, is formed in one piece. This means that the base wall 7 and the side walls 10, 11 are formed in one piece, i.e., from a single piece, for example, a monoblock. This allows the manufacturing effort of the assembly 2 to be kept particularly low. Furthermore, the mechanical load-bearing capacity of the assembly 2 can be significantly increased.

[0046] Fig. 10 shows the assembly 2 in a schematic and perspective partial sectional view according to a further embodiment, in which the longitudinal member 4, in particular the U-profile 6 of the longitudinal member 4, is closed upwards in the vehicle vertical direction 8 by means of at least one locking plate 39. The locking plate 39 can be designed as a luggage compartment floor panel 40. Alternatively, the locking plate 39 is designed as a further component 41 formed separately from the luggage compartment floor panel 40, which is, for example, an upper extension of the longitudinal member 4 in the vehicle vertical direction 8, which can also be referred to as a "longitudinal member upper extension". As in Fig. 10, the longitudinal member 4 or its U-profile 6 can also be closed at the top by the luggage compartment floor sheet 40 and the further component 41 in the vehicle vertical direction 8.

[0047] In the exemplary embodiment, a cross member 42, which is formed separately from the longitudinal member 4 and the bulkhead element 16, is arranged on the longitudinal member 4, in particular inwardly in the vehicle transverse direction 5. In this case, the cross member 42 is arranged on a side 43 of the first side wall 10 of the longitudinal member 4 facing away from the bulkhead element 16, at least partially overlapping with the bulkhead element 16. This is also the case in Fig. 11, in which the assembly 2 is shown in a schematic partial sectional view from above in the vehicle vertical direction 8. In the exemplary embodiment, the cross member 42 has two side walls 42a, 42b extending in the vehicle transverse direction 5. In this case, a first of the side walls 42a has an inner side facing rearward in the vehicle longitudinal direction 12, and the second of the side walls 42b has an inner side facing forward in the vehicle longitudinal direction 12. The term "inner side" is understood here to mean that the respective side of the respective side wall 42a, 42b faces inward with respect to the cross member 42.The bulkhead element 16, in particular the first bulkhead element part 31, has, for example, a first support region 45, via which the bulkhead element 16, in particular the first bulkhead element part 31, is supported on the first side wall 10 in the vehicle transverse direction 5, for example inwards. Furthermore, the bulkhead element 16, in particular the second bulkhead element part 32, has a second support region 46, via which the bulkhead element 16, in particular the second bulkhead element part 32, is supported on the first side wall 10 of the longitudinal member 4 in the vehicle transverse direction 5, for example inwards. The cross member 42, in particular the first side wall 42a, in the present case has a third support region 47, via which the cross member 42 is supported on the first side wall 10 of the longitudinal member 4 in the vehicle transverse direction 5, for example outwards.Furthermore, in the present case, the cross member 42, in particular the second side wall 42b, has a fourth support region 48, via which the cross member 42 is supported on the first side wall 10 of the longitudinal member 4. As shown in . Fig. 11, in the exemplary embodiment, the support regions 45, 47 and the support regions 46, 48 overlap one another. This means that the support regions 45, 47 and 46, 48 cover one another in the vehicle transverse direction 5, even though they are arranged on different sides of the side wall 10 of the longitudinal member 4. Thus, for example, a first straight line, in particular an imaginary one, which extends perpendicular to the side wall 10 of the longitudinal member 4, runs through both the first and the third support region 45, 47. Furthermore, for example, a second straight line, in particular an imaginary one, which extends perpendicular to the first side wall 10 of the longitudinal member 4, runs through both the second and the fourth support region 46, 48.As a result, the bulkhead element 16 and the cross member 42 can be particularly well supported against one another, thereby significantly increasing the mechanical load-bearing capacity of the assembly 2. For example, it is provided that the first bulkhead element part 31 and the first side wall 42a of the cross member 42 are aligned with one another and / or that the second bulkhead element part 32 and the second side wall 42b of the cross member 42 are aligned with one another.

[0048] As in Fig. As can be seen in Figure 11, at least one of the support areas 47, 48 can be designed to be particularly wide, for example, to enable a common three-sheet spot weld. Accordingly, at least one of the support areas 45, 46 can also be designed to be particularly wide.

[0049] Fig. 12 shows the assembly 2, in particular the bulkhead element 16 and the threaded bushing 14, in a schematic partial sectional view according to another embodiment. The bulkhead element 16, for example the first bulkhead element part 31, has a raised portion 49 formed separately from the fourth weld seam 29, in particular separately from any welded joints, which is arranged on the side 30 facing upward in the vehicle's vertical direction 8, which in the present case is a side 30 of the threaded bushing 14 facing away from the base wall 7 of the longitudinal member 4. In the exemplary embodiment, the raised portion 49 is arranged within the weld seam 29.Via the elevation 49, the bulkhead element 16, in particular the first bulkhead element part 31, rests, in particular directly, on the threaded bushing 14 on the side 30 of the threaded bushing 14 facing away from the base wall 7, whereby a gap 50 extends in the vertical direction 8 of the vehicle between the bulkhead element 16 and the threaded bushing 14, in particular before the welded connection between the bulkhead element 16 and the threaded bushing 14 is formed. This gap 50 can be at least partially closed or bridged by the weld seam 29. During welding, however, this gap 50 can be used for degassing, i.e. for discharging gases, during the welding process. For example, the elevation 49 has at least one curvature. This means that the elevation 49 is curved at least in some regions. Alternatively, it is possible for the threaded bushing 14, rather than the bulkhead element 16, to have the elevation 49.

[0050] Fig. 13 shows the assembly 2 in a schematic and perspective partial view according to a further embodiment, in which at least one channel 51 provided for discharging at least one liquid medium is formed or is formed through the bulkhead element 16. Thus, the liquid medium can flow through the channel 51, in particular. The channel 51 is designed, for example, as a targeted elevation or depression in order to be able to discharge the cohesive medium in a targeted manner from the bulkhead element 16. The liquid medium is, for example, a paint, in particular intended for cathodic dip painting, or another liquid intended for cathodic dip painting.During dipping processes during painting, for example, cathodic dip painting and its pretreatments, body structures of the motor vehicle body 3, and in particular their cavities, can be flooded with liquids several times, and the liquid medium is subsequently required to drain away again. For this purpose, the corresponding channel 51 or several such channels 51 can be provided to ensure flooding or drainage in the U-profile 6 of the longitudinal member 4. This prevents the "bulkhead" from completely closing off a longitudinal member channel, as in a submarine, but rather being permeable to liquids during dip painting.

[0051] Fig. 14 shows the assembly 2 in a schematic and perspective partial view according to a further embodiment, in which the threaded bushing 14 arranged within the housing 19 is accommodated in the housing 19 prior to its fastening, in particular welding to the base wall 7, so as to be movable, for example, in the vehicle longitudinal direction 12 and / or in the vehicle transverse direction 5. As a result, the threaded bushing 14 can be displaced or adjusted in the vehicle longitudinal direction 12 and the vehicle transverse direction 5 during production, in particular prior to welding, without other sheets having to be displaced as well. This can be a particularly helpful contribution to a particularly high body construction quality in order to be able to react to tolerance fluctuations of neighboring components or the like. This embodiment is particularly advantageous when the bulkhead element 16 is formed in one piece. Directions of movement of the threaded bushing 14 are in Fig. 14 is illustrated by arrows 52.

[0052] Overall, it can be seen that the enclosure 19, also referred to as a cage, for the threaded bushing 14 can be formed by means of the bulkhead element 16, whereby the bulkhead element 16 can also be referred to as a "cap bulkhead" or "hood bulkhead." Laser welding allows the enclosure 19 to be completely locked, for example, at the top, bottom, left, and right. This can result in the following advantages in particular: - Local dynamic connection stiffness of the chassis component 1. - No welding points on contact surfaces (corrosion prevention). - Not a classic rear axle mount, but a mount in the U-profile 6 and thus in a rear crash path. - Round bushing design of the threaded bushing 14 by laser cutting. List of reference symbols 1 chassis component 2 Assembly 3 Motor vehicle body 4 longitudinal members 5 Vehicle transverse direction 6 U-profile of the longitudinal member 7 Base wall 8 Vehicle vertical direction 9 Top 10 first side wall of the longitudinal member 11 second side wall of the longitudinal member 12 Vehicle longitudinal direction 13 axial direction of the U-profile of the longitudinal member 14 threaded bushing 15 Recording room 16 bulkhead element 17 U-profile of the bulkhead element 18 Circumferential direction 19 Enclosure 20 Recording area 21 first page 22 second page 23 axial direction 24 Central axis 26 Weld seam 27 second weld 28 third weld 29 fourth weld 30 third page 31 first bulkhead element part 32 second bulkhead element part 33 additional welds 34 additional welds 35 Arrow 36 additional welded joints 37 additional welded joints 38 Arrow 39 Strike plate 40 Luggage compartment floor sheet 41 additional component 42 cross members 42a first side wall of the cross member 42b second side wall of the cross member 43 pages 45 first support area 46 second support area 47 third support area 48 fourth support area 49 Survey 50 gap 51 channel 52 Arrow

Claims

[1] Assembly (2) for a motor vehicle body (3), with a longitudinal member (4) having a U-profile (6), which has a base wall (7) with an upper side (9) facing upwards in the vehicle vertical direction (8) and two side walls (10, 11) adjoining the base wall (7) on both sides in the vehicle transverse direction (5) and projecting from the base wall (7), with a threaded bushing (14) provided for fastening a chassis component (1), which is fastened on the upper side (9) to the base wall (7), and with a bulkhead element (16) which is arranged on the upper side (9), wherein the side walls (10, 11) are supported on one another via the bulkhead element (16) in the vehicle transverse direction (8) and the bulkhead element (16) and the side walls (10, 11) together form a form enclosure (19), characterized byin that the bulkhead element (16) has a U-profile (17) and is welded to the base wall (7), wherein the bulkhead element (16) is connected to the threaded bushing (14) by means of a welded connection on a side (30) of the threaded bushing (14) facing away from the base wall (7) of the longitudinal member (4), and the bulkhead element (16) or the threaded bushing (14) has a raised portion (49) formed separately from the welded connection, via which the bulkhead element (16) rests on the threaded bushing (14) on the side facing away from the base wall (7). [2] Assembly (2) according to claim 1, characterized by that the bulkhead element (16) completely surrounds a central axis (24) of the threaded bushing (14) running in the axial direction (23) of the threaded bushing (14) in the circumferential direction (18) of the threaded bushing (14). [3] Assembly (2) according to claim 1 or 2, characterized bythat an axial direction (23) of the U-profile (6) of the longitudinal member (4) and an axial direction of the U-profile (17) of the bulkhead element (6) run obliquely or perpendicular to one another. [4] Assembly (2) according to one of the preceding claims, characterized by that the bulkhead element (16) is formed in several parts, in particular in two parts. [5] Assembly (2) according to one of the preceding claims, characterized by that the bulkhead element (16) and the threaded bushing (14) are connected to one another, in particular by means of laser welding, spot welding or wobble riveting. [6] Assembly (2) according to one of the preceding claims, characterized by , that • the threaded bushing (14) is welded to the base wall (7) of the longitudinal member (4), preferably by means of laser welding, and / or • the bulkhead element (16) is welded to the side walls (10, 11) of the longitudinal member (4), preferably by means of laser welding, and / or • the bulkhead element (16) is welded to the base wall (7) of the longitudinal member (4), preferably by means of laser welding. [7] Assembly (2) according to one of the preceding claims, characterized by that the threaded bushing (14) has a round, in particular circular, cross-section. [8] Assembly (2) according to one of the preceding claims, characterized by that the bulkhead element (16) and the threaded bushing (14) are welded together on three different sides (21, 22, 30) of the threaded bushing (14). [9] Assembly (2) according to one of the preceding claims, characterized bythat a cross member (42) formed separately from the longitudinal member (4) and the bulkhead element (16) is arranged on a first of the side walls (10) of the longitudinal member (4) on a side (43) of the first side wall (10) facing away from the bulkhead element (16) in at least partial overlap with the bulkhead element (16) and the cross member (42) and the bulkhead element (16) are supported on one another via the first side wall (10) in the vehicle transverse direction (5).

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