Tail structure for a motor vehicle and motor vehicle having such a tail structure

Abstract

The invention relates to a rear structure for a motor vehicle, comprising two longitudinal beams (8), a front cross beam (10) and a rear cross beam (12). The front cross beam and the rear cross beam connect the longitudinal beams to one another. The rear structure is a one-piece die-cast component which, as a one-piece component, also comprises extensions (20) of the longitudinal beams and a rear cover support (22), which, in a functionally installed state of the rear structure on the motor vehicle, respectively adjoin a relevant longitudinal beam among the longitudinal beams in the motor vehicle longitudinal direction to the rear, and which connects the extensions of the longitudinal beams to one another, the extensions of the longitudinal beams, the rear cross beam and the rear cover support defining a second interspace (28) in which a luggage compartment trough of the motor vehicle can be arranged. The invention also relates to a motor vehicle having such a rear structure.

Description

Technical Field

[0001] The present invention relates to a rear structure for a motor vehicle and a motor vehicle having such a rear structure. Background Technology

[0002] Tail structures for motor vehicles are known from the prior art in various embodiments.

[0003] DE102020214105A1 describes a rear structure for a motor vehicle, comprising two longitudinal beams extending in the longitudinal direction of the vehicle and two crossbeams. Each crossbeam extends in the transverse direction of the vehicle and connects the longitudinal beams to each other. For this purpose, each longitudinal beam includes a plurality of laterally fixed sections, through which each longitudinal beam is connected to each crossbeam.

[0004] The assembly of the tail structure described in DE102020214105A1 is complicated by the many lateral fixed sections. Summary of the Invention

[0005] Therefore, an object of the present invention is to provide a rear structure for a motor vehicle with low assembly complexity. Furthermore, an object of the present invention is to provide a motor vehicle having such a rear structure.

[0006] The objective is achieved according to the present invention through the tail structure and through a motor vehicle.

[0007] Therefore, according to the present invention, a rear structure for a motor vehicle is proposed, the rear structure comprising two longitudinal beams, a front crossbeam, and a rear crossbeam. The front and rear crossbeams respectively connect the longitudinal beams to each other. The rear structure is an integrally cast die-cast component, which, as an integral component, also includes extensions of each longitudinal beam and a rear cover support. In the functionally installed state of the rear structure on the motor vehicle, each extension is respectively adjacent to one of the corresponding longitudinal beams in the longitudinal direction of the motor vehicle. The rear cover support connects the extensions of each longitudinal beam to each other. The extensions of each longitudinal beam, the rear crossbeam, and the rear cover support define a second gap in which a luggage compartment of the motor vehicle can be provided.

[0008] Therefore, the core concept of this invention is to integrally construct the tail structure by means of die casting. This eliminates the assembly complexity required for the tail structure, especially for connecting the crossbeams and longitudinal beams.

[0009] This rear structure is, for example, a component of the body of a motor vehicle.

[0010] The longitudinal beams can, for example, be connected to the rear end of the side sill of the motor vehicle at their front end in the longitudinal direction of the motor vehicle.

[0011] Therefore, in the functional installation state of the rear structure on the motor vehicle, the longitudinal beams can respectively connect to the rear adjacent side door in the longitudinal direction of the motor vehicle.

[0012] For example, in the functional installation state of the rear structure on a motor vehicle, the two longitudinal beams may extend at least substantially in the longitudinal direction of the motor vehicle and be spaced apart from each other in the transverse direction of the motor vehicle.

[0013] In the functional installation configuration of the rear structure on a motor vehicle, the front and rear crossbeams can extend in the lateral direction of the vehicle. The front and rear crossbeams can be spaced apart from each other in the longitudinal direction of the vehicle.

[0014] By means of longitudinal beams, one side sill of the motor vehicle can be connected to the spring support of the motor vehicle.

[0015] In a preferred embodiment, the tail structure according to the invention includes extensions of each longitudinal beam.

[0016] In the functional installation state of the rear structure on the motor vehicle, the extension of each longitudinal beam is respectively adjacent to one of the relevant longitudinal beams in the longitudinal direction of the motor vehicle.

[0017] In one exemplary embodiment, the rear structure according to the invention includes a first gap, in which the bottom of the vehicle's luggage compartment can be disposed.

[0018] The first gap can be defined laterally, i.e., in the transverse direction of the vehicle, by the longitudinal beams. In the longitudinal direction of the vehicle, the first gap can be defined in front by the front crossbeam and in the rear by the rear crossbeam. That is, the longitudinal beams, the front crossbeam, and the rear crossbeam define the first gap laterally.

[0019] The first gap is, for example, at least approximately cuboid in shape.

[0020] Therefore, the first gap can be at least approximately rectangular in the top view.

[0021] The first gap, for example, has no connecting piece, which extends from the longitudinal beam, the front crossbeam, and / or the rear crossbeam.

[0022] In one exemplary embodiment, the tail structure according to the invention includes a tail cover support.

[0023] When the rear structure is installed in its functional state on a motor vehicle, the rear cover support can extend in the lateral direction of the motor vehicle.

[0024] The rear cover support can, particularly in the transverse direction of the vehicle, be adjacent to the end regions of the extensions of each longitudinal beam on the end side, which are located rearward in the longitudinal direction of the vehicle. Therefore, the rear cover support can connect the extensions of each longitudinal beam to each other.

[0025] In a preferred embodiment, the tail structure according to the invention includes a second gap.

[0026] The second gap is defined laterally, for example, by the extensions of each longitudinal beam. In the longitudinal direction of the vehicle, at the front, the second gap is defined, for example, by the rear crossbeam.

[0027] The second gap may be open at the rear, especially in the longitudinal direction of the vehicle.

[0028] Each longitudinal beam extension may have a connecting element at the rear in the longitudinal direction of the vehicle, and the rear cover support of the vehicle can be fixed to the connecting element. The rear cover support is, for example, not part of the rear structure. The second gap can be closed at the rear in the longitudinal direction of the vehicle by means of the rear cover support.

[0029] In a preferred embodiment, the rear structure according to the invention includes extensions of each longitudinal beam and a rear cover support member. In a functionally installed state on a motor vehicle, the extensions are respectively adjacent to one of the relevant longitudinal beams in the longitudinal direction of the vehicle. The rear cover support member connects the extensions of each longitudinal beam to each other. The extensions of each longitudinal beam, the rear crossbeam, and the rear cover support member define a second gap in which a luggage compartment of the motor vehicle can be disposed. Therefore, in the longitudinal direction of the motor vehicle, the second gap is defined rearward by the rear cover support member, which is an integral part of the rear structure.

[0030] In a preferred embodiment, the tail structure according to the invention includes a tail cover.

[0031] The tail cover support and the tail cover can be integrally formed, that is, they together constitute a single component.

[0032] For example, a luggage compartment can be provided in the second gap, which defines the interior of the motor vehicle on the bottom side.

[0033] The luggage compartment can be a single piece or multiple pieces.

[0034] The second gap is, for example, at least approximately cuboid in shape.

[0035] Therefore, the second gap can be at least approximately rectangular in the top view.

[0036] When the rear structure is installed on the vehicle in a functional manner, the second gap can be located behind the first gap in the longitudinal direction of the vehicle.

[0037] The second gap may not have a connecting piece extending from the sidewall defining the gap, i.e. from the extension of each longitudinal beam, from the rear crossbeam and / or the tail cover support.

[0038] When the rear structure is installed in its functional state on a motor vehicle, the rear cover is adjacent to the rear cover support member in the longitudinal direction of the motor vehicle.

[0039] In one exemplary embodiment, the tail structure according to the invention includes a wheel cover, particularly a rear wheel cover, or includes at least a portion of a wheel cover.

[0040] In a preferred embodiment, the rear structure according to the invention includes spring supports. These spring supports respectively form connection points with the chassis. In particular, the spring supports can be used to secure the vehicle's spring legs.

[0041] In a preferred embodiment, the tail structure according to the invention is an aluminum die-cast component, i.e., a component made of aluminum in such a way that the aluminum is extruded into a preheated mold under high pressure in a liquid or flowing state.

[0042] In a preferred embodiment, the tail structure according to the invention is digitally optimized, i.e., simulated by computer using digital methods, with particular objectives of improving specific values, such as its stiffness, its acoustic excitation, and / or its strength.

[0043] The tail structure may be, for example, parameter-optimized, shape-optimized, and / or topology-optimized.

[0044] The parameter optimization involves the following issues: in particular, what dimensions, orientations, layouts, and / or materials and material qualities are required for the structural elements of the tail structure to achieve specific target values. Here, individual parameters, such as the cross-section of beam elements or the wall thickness of shell elements, are changed.

[0045] Shape optimization is performed to achieve the defined target values. This is achieved by adapting the shape of the tail structure, particularly the shape of at least one through-hole, at least one pressing section, and / or at least one rib, for example, to minimize stress peaks in the structural mechanism of the tail structure. Here, the geometric parameters of local regions of the tail structure are varied such that the stress is distributed more uniformly, and thus the stress peaks are minimized.

[0046] Geometric parameters may include component dimensions, hole radius and bend radius and / or hole location and bend location.

[0047] Shape optimization can be achieved using the Vertex-Morphing-Algorithmus.

[0048] Topology optimization involves optimizing the material distribution within a predetermined design space so that the tail structure satisfies the given objective values ​​using the least amount of material, or improves the objective values ​​with a fixed amount of material. To this end, a suitable frame is fabricated from the tail structure by avoiding carrying insufficient material in each iteration step, or by redistributing insufficient material. Therefore, topology optimization seeks the most material-efficient support structure under different variables, which simultaneously satisfies all objective values ​​on the tail structure, or achieves the best objective values ​​with a fixed amount of material.

[0049] The present invention also relates to a motor vehicle that includes the rear structure described above.

[0050] The motor vehicle may include a body, which includes the rear structure described above. Attached Figure Description

[0051] The invention will now be explained in more detail with the aid of embodiments described in the accompanying drawings. The drawings are as follows:

[0052] Figure 1 A perspective view showing the first tail structure according to the present invention;

[0053] Figure 2 Showing a top view of the first tail structure according to the present invention;

[0054] Figure 3 A top view of the second tail structure according to the present invention is shown; and

[0055] Figure 4 Showing a top view of the third tail structure according to the present invention. Detailed Implementation

[0056] exist Figure 1 and 2 The first rear structure 2 for a motor vehicle according to the invention is described herein. The first rear structure 2 is an integrally cast die-cast component comprising two longitudinal beams 8, a front crossbeam 10 and a rear crossbeam 12, two front wheel arch portion areas 14, two rear wheel arch portion areas 16, and two rear spring supports 18.

[0057] In the functional installation state of the first rear structure 2 on the motor vehicle, two longitudinal beams 8 extend in the longitudinal direction of the motor vehicle, and the front crossbeam 10 and the rear crossbeam 12 extend in the transverse direction of the motor vehicle. Therefore, the front crossbeam 10 and the rear crossbeam 12 extend orthogonally to each of the longitudinal beams 8.

[0058] The front crossbeam 10 and the rear crossbeam 12 are respectively adjacent to the first longitudinal beam of each of the longitudinal beams 8 at their first ends. The second end is opposite to the first end in the transverse direction of the motor vehicle, at which the front crossbeam 10 and the rear crossbeam 12 are adjacent to the second longitudinal beam of each of the longitudinal beams 8.

[0059] The front crossbeam 10, the rear crossbeam 12, and each longitudinal beam 8 thus define the first gap 26. For example, especially by... Figure 2 As can be seen, the first gap 26 has an approximately rectangular shape in the top view, that is, when viewed from above.

[0060] The bottom of the vehicle's luggage compartment can be installed in the first gap 26.

[0061] The first gap 26 is open both above and below in the vertical direction of the vehicle.

[0062] Figure 3 This illustrates a second rear structure 4 for a motor vehicle according to the present invention. This second rear structure 4 substantially corresponds to... Figure 1 and 2 The first tail structure 2 is described in the text. Therefore, only the distinguishing features will be explained below. For all other features, the preceding description relating to the first tail structure 2 applies.

[0063] In addition to the two longitudinal beams 8, the front crossbeam 10, the rear crossbeam 12, the two front wheel arch portion areas 14, the two rear wheel arch portion areas 16, and the two rear spring supports 18, the second tail structure 4 includes extensions 20 of the two longitudinal beams 8.

[0064] The extension 20 of each longitudinal beam 8 extends in the longitudinal direction of the motor vehicle and is adjacent to one of the relevant longitudinal beams 8 on the end side in the longitudinal direction of the motor vehicle.

[0065] The extensions 20 of each longitudinal beam 8, together with the rear cross beam 12, define a second gap 28. For example, a luggage compartment can be provided in this second gap 28.

[0066] Therefore, the second gap 28 is defined in the longitudinal direction of the vehicle at the front by the crossbeam 12, and in the transverse direction of the vehicle at the side by each longitudinal beam 8. The second gap 28 is open in the longitudinal direction of the vehicle at the rear, and in the vertical direction of the vehicle at the top and bottom.

[0067] The second gap 28 is located behind the first gap 26 in the longitudinal direction of the motor vehicle.

[0068] Each longitudinal beam 8 extension 20 may have a (undescribed) connecting element at the rear in the longitudinal direction of the vehicle. The (undescribed) rear cover support of the vehicle may be fixable to each connecting element.

[0069] exist Figure 4 The third rear structure 6 for a motor vehicle according to the present invention is described herein. This third rear structure 6 substantially corresponds to... Figure 3 The second tail structure 4 is described in the text. Therefore, only the distinguishing features will be explained below. For all other features, the preceding explanations relating to the second tail structure 4 apply.

[0070] In addition to the two longitudinal beams 8, the front crossbeam 10, the rear crossbeam 12, the two front wheel arch portion areas 14, the two rear wheel arch portion areas 16, the two rear spring supports 18, and the extensions 20 of the two longitudinal beams 8, the third tail structure 6 includes a tail cover support 22 and a tail cover 24.

[0071] The rear cover support 22 extends in the transverse direction of the vehicle and is adjacent to the rearward end of the extension 20 of each longitudinal beam 8 in the longitudinal direction of the vehicle. Therefore, the rear cover support 22 connects the extensions 20 of each longitudinal beam 8 to each other and defines the second gap 28 in the longitudinal direction of the vehicle.

[0072] The rear cover 24 is adjacent to the rear cover support 22 in the longitudinal direction of the vehicle.

[0073] Alternatively, the tail cover 24 may not be a component of the third tail structure 6, i.e., not a component of the integral component, but may be fixed to the tail cover support 22 via connecting elements.

[0074] List of reference numerals

[0075] 2 First tail structure

[0076] 4. Second tail structure

[0077] 6. Third tail structure

[0078] 8 Longitudinal beams

[0079] 10. Front crossbeam

[0080] The crossbeam behind 12

[0081] 14. Front wheel arch area

[0082] 16. Rear wheel arch area

[0083] 18. Rear spring support

[0084] 20 Extension

[0085] 22 Rear end cover support

[0086] 24 Rear Cover

[0087] 26 First gap

[0088] 28 Second gap

Claims

1. A rear structure for a motor vehicle, comprising two longitudinal beams (8), a front cross beam (10) and a rear cross beam (12), the front cross beam (10) and the rear cross beam (12) connecting the longitudinal beams (8) to each other, respectively, characterized in that, The rear structure (2, 4, 6) is an integrally cast die-cast component which, as an integral component, also comprises extension parts (20) of the respective longitudinal beams (8) and a rear cover support (22), the extension parts each adjoining a respective associated longitudinal beam of the respective longitudinal beams (8) behind in the motor vehicle longitudinal direction in the functionally installed state of the rear structure (2, 4, 6) on the motor vehicle, the rear cover support connecting the extension parts (20) of the respective longitudinal beams (8) to one another, the extension parts of the respective longitudinal beams (8), the rear cross member (12) and the rear cover support (22) defining a second interspace (28) in which a luggage compartment trough of the motor vehicle can be arranged.

2. The tail structure of claim 1, wherein, The rear structure (2, 4, 6) is an aluminum die-cast component.

3. The tail structure according to claim 1 or 2, characterized in that The respective longitudinal beam (8), the front cross member (10) and the rear cross member (12) define a first interspace (26) in which a luggage compartment floor can be arranged.

4. The tail structure according to claim 1 or 2, characterized in that The rear cover (24) is not an integral component of the rear structure (6), but is fastened to the rear cover support (22) by means of a connecting element.

5. The tail structure of claim 1 or 2, wherein The rear cover (24), the spring support (18) and / or at least a part of the wheelhouse (14, 16).

6. The tail structure of claim 1 or 2, wherein, The rear structure (2, 4, 6) is digitally structure-optimized.

7. The tail structure of claim 1 or 2, wherein, The rear structure (2, 4, 6) is shape-optimized, parameter-optimized and / or topologically optimized.

8. Motor vehicle, characterized in that The rear structure (2, 4, 6) according to any one of claims 1 to 7. The rear structure (2, 4, 6) according to any one of claims 1 to 7.

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