Vehicle carrying structure with closed hollow profile, in particular longitudinal beam, and vehicle frame structure with at least one such vehicle carrying structure

Abstract

The invention relates to a vehicle load-bearing structure (20) having a closed hollow profile, in particular a longitudinal beam of a vehicle (10). The vehicle load-bearing structure (20) according to the invention has a closed hollow profile, wherein a hollow space (46) extends in a main direction, referred to as longitudinal direction. Here, a reinforcing element (36) having a three-dimensional geometry is arranged in a torsionally rigid manner within the hollow space (46), wherein the reinforcing element (36) extends at least over half of the respective lateral extension of the hollow space (46) in a direction transverse to the longitudinal direction of the hollow space (46). The vehicle frame structure (14) according to the invention has at least two lateral longitudinal beams (16) extending in the vehicle longitudinal direction and at least one cross beam (18) connecting the longitudinal beams (16) to one another in the vehicle transverse direction.

Description

TECHNICAL FIELD

[0001] The invention relates to a vehicle load-bearing structure having a closed hollow profile, in particular a vehicle longitudinal beam. The invention further relates to a vehicle frame structure having at least one vehicle load-bearing structure, in particular a vehicle frame structure formed by lateral longitudinal beams extending in the vehicle longitudinal direction, wherein the longitudinal beams are arranged on the outside respectively and have a closed hollow profile in the vehicle transverse direction, wherein at least one cross beam is provided which connects the longitudinal beams to one another in the vehicle transverse direction. Preferably, two or more cross beams are provided, so that at least one closed vehicle frame structure consisting of at least two longitudinal beams and two cross beams is obtained in the perspective from above. In particular, reference is made to a motor vehicle, in particular to a passenger car. BACKGROUND

[0002] A vehicle underbody structure of a motor vehicle is known from EP 3616957 A1, which comprises two longitudinal beams, a plurality of cross beams connecting the longitudinal beams to one another and at least one reinforcing element extending between the cross beams in the longitudinal direction of the vehicle.

[0003] A vehicle body structure is known from US 2016 / 0272253 A1, which has a lower end wall separating the engine compartment from the passenger compartment, wherein the end wall extends on the outside respectively up to the region of the respective wheelhouse. Adjacent to the end wall, outer longitudinal beams extending in the vehicle longitudinal direction are arranged. In order to reinforce the end wall in the region of the wheelhouse, a separate reinforcing element is respectively provided, which extends from the outer longitudinal beam respectively in the vehicle transverse direction inwards towards the vehicle middle.

[0004] The structure of the longitudinal beams is not described or shown in detail in the above documents. SUMMARY

[0005] The invention is based on the task of improving a vehicle carrier structure having closed hollow profiles and a vehicle frame structure having such a vehicle carrier structure in terms of its rigidity and crash safety when forces act transversely onto the vehicle carrier structure. The invention is particularly suitable for use in the case where the vehicle carrier structure is a longitudinal beam arranged on the outside of the vehicle and optionally also part of the vehicle frame structure and which is loaded from the side, as in the case of a lateral obstacle crash, or when the vehicle carrier structure is loaded with a lateral obstacle having a limited surface, as in the case of a Pfahlcrash. In practice, the following problem arises in the case of such longitudinal beams: the hollow profiles are not accessible or can only be accessed with restrictions, or these hollow profiles have only a very small hollow space, whereby the introduction of reinforcement methods known from practice, such as transverse bulkheads, and fixings which can be carried out from the outside, cannot be implemented or can only be implemented with high outlay and correspondingly high production costs. With the aid of the invention, the following possibility should be provided in this respect, namely to achieve an increase in the rigidity of the vehicle carrier structure having hollow profiles in a simple and cost- appropriate manner even in the case where the hollow space is not accessible or only difficult to access.

[0006] According to the invention, the task is solved according to the invention. Further practical embodiments and advantages of the invention are described in connection with the description.

[0007] The vehicle carrying structure according to the application has a closed hollow profile, the hollow space of which extends in a main direction, which is referred to as the longitudinal direction. Here, a reinforcing element having a three-dimensional geometry is arranged in the hollow space in a torsion-resistant manner, wherein the reinforcing element extends at least over half of the respective lateral extension of the hollow space in a direction transverse to the longitudinal direction of the hollow space. The reinforcing element preferably extends over at least 75%, at least 80%, at least 90% of the entire respective lateral extension or particularly preferably over the entire respective lateral extension. In the last-mentioned case, the reinforcing element can be referred to as a support strut in this regard, which is located on the inside of the hollow profile in the hollow space and which significantly increases the stiffness of the vehicle carrying structure when a force is acting in the transverse direction. A further advantage in the case where the reinforcing element extends over the entire lateral extension of the hollow space is that the reinforcing element, if it is suitably designed in terms of geometry and implements the internal geometry of the hollow profile, can be positioned torsion-resistant and positionally fixed as a result of the interaction with the internal geometry of the hollow profile, so that no additional fixation by welding, bonding or other measures is required. In this case, a particularly simple assembly is achieved either by pressing through the opening into the hollow space or in the case of a two- or multi-part formed vehicle carrying structure with a shell element by inserting the reinforcing element before the shell element is joined. In the sense of the application, the torsion-resistant arrangement of the reinforcing element in the hollow space means in particular that the orientation of the reinforcing element in its orientation transverse to the longitudinal direction cannot be changed or can only be changed so restrictively that, for example, the horizontal orientation for producing reinforcement in the vehicle transverse direction in the x-y plane is maintained and thus ensures that forces introduced into the vehicle carrying structure in the transverse direction (y-direction) in this plane are also supported by the reinforcing structure. The reinforcing structure is preferably also arranged torsion-resistant in other rotational directions, in particular in that the length of the reinforcing element is selected to be greater than the maximum dimension of the hollow space transverse to, in particular perpendicular to, the longitudinal direction.

[0008] In a practical embodiment of the vehicle carrying structure according to the application, the reinforcing element is formed from a plate-like element and / or is configured with at least one groove (Sicke) and / or a wave-shaped geometry at the reinforcing element. This means in particular that the reinforcing element is made from a plate-like element, which can be reshaped into a structurally suitable reinforcing element relatively easily and cost- appropriately. In a particularly simple and cost-technically preferred embodiment, such a plate-like element has a constant material thickness at least before reshaping. A plate-like element is understood in particular as a sheet or a planar element made of a non-metallic material, the thickness of which is significantly smaller than the length and the width, in particular the maximum 10% or the maximum 5% or the maximum 1% of the minimum of the length and the width.

[0009] In the sense of the application, a recess is understood in particular as a press-in portion which has at least one modified edge and thus has a mathematical discontinuity in cross section. If the reinforcing element, despite a cross-sectional profile which is mathematically continuous, has at least one wave-shaped configuration, but a sufficient stiffening can also be achieved by means of the reinforcing element. It is also possible and targeted from the point of view of stiffening to combine a wave-shaped configuration with a recess. The recess is understood as a recess which has a modified edge with a flattened corner and thus also has a planar region in the area of the respective recess. This planar region can advantageously be used as a contact surface for a planar connection, if possible additional, of the reinforcing element to a wall section of the vehicle carrier structure, for example in such a way that a plurality of welding points are provided in the area of this contact surface.

[0010] If the reinforcing element is formed from a plate-like element, this reinforcing element can be produced in a particularly simple and cost- appropriate manner and can also be brought to a geometry which is suitable for achieving the desired protection against twisting. In particular, for this purpose, a standard plate material can be cut or punched to the desired dimensions. The recesses and / or the wave-shaped geometry can then be produced on the plate-like element (blank) by means of pressing, extrusion and / or other modifications, including bending.

[0011] The additional bending of the plate-like element, in particular around one or more axes which are transverse to the longitudinal axis of the carrier structure, has the advantage that in this way not only a geometry-induced fixing of the reinforcing element which prevents movement in the longitudinal direction of the hollow profile can be produced, but also a protection against twisting around different axes of rotation. This is particularly suitable for carrier structures in which the hollow space itself does not have a linear course, but a curved course.

[0012] In a further practical embodiment, the hollow profile and / or the reinforcing element is made of a weldable material and / or a metallic material. In this regard, reference is made in particular to the materials steel, aluminum and plastic. A weldable material pairing has the advantage that spot welding can be carried out in a simple and cost- appropriate manner in order to be able to achieve an automated fixing between the reinforcing element and the vehicle carrier structure.

[0013] Depending on the application and the framework conditions, the reinforcing element can be fixed in the hollow space in an arbitrary manner, material- locking, force- locking and / or form- locking. For example, the reinforcing element can be fixed at the peripheral wall of the hollow space material- locking by means of one or more welding points. When the vehicle carrier structure is formed from two or more shell elements, this can be particularly well achieved in such a way that the reinforcing element is first fixed at a shell element and the shell element is then connected with a further shell element or a plurality of further shell elements to a hollow profile.

[0014] A simple and cost-effective possibility of force-fittingly fixing the reinforcement element in the hollow space of the vehicle carrier structure according to the application consists in configuring the reinforcement element such that it is arranged without play in the hollow space. To this end, the reinforcement element can be configured, for example, as a plate having one or more spring- elastically pre-tensioned clamping regions. Such a reinforcement element can then either be positioned in the hollow space with the pre-tensioning force before the joining of the vehicle carrier structure formed from the plurality of shell elements, in order to enclose it in the hollow space during manufacture. Alternatively, such a reinforcement element can subsequently be inserted or pressed into the hollow space of the vehicle carrier structure, which has already been brought to its final shape having the hollow space.

[0015] In a further practical embodiment of the vehicle carrier structure according to the application, the hollow profile is formed from at least two mutually connected shell elements, and / or the reinforcement element is positioned in a defined position in the hollow profile without twisting and / or positionally fixedly, as a result of its three-dimensional geometry, in interaction with the inner geometry of the hollow profile.

[0016] The configuration of the vehicle carrier structure from two or more mutually connected, in particular mutually welded, shell elements has the advantage that complex three-dimensional geometries can also be realized, and the positioning and fixing of the reinforcement element within the vehicle carrier structure can be carried out in a simple manner before the joining of the shell elements.

[0017] If the reinforcement element is positioned in a defined position in the hollow profile without twisting and / or positionally fixedly, as a result of its three-dimensional geometry, in interaction with the inner geometry of the hollow profile, not only is assembly easy, but in this case also a separate fixing process, for example welding, bonding or other fixing by a separate work step, can be dispensed with.

[0018] If the reinforcement structure has at least one contact point with the hollow profile, which is spaced apart from the lateral edge of the reinforcement structure, the fixing of the reinforcement structure in the hollow space at this contact point takes place spaced apart from the lateral edge of the reinforcement structure. This is particularly advantageous when the contact area between the lateral edge of the reinforcement structure and the hollow profile is difficult to access or is not suitable for implementing the fixing due to structural constraints.

[0019] The application also relates to a vehicle frame structure having at least two lateral longitudinal beams which extend in the vehicle longitudinal direction and at least one cross beam which connects the longitudinal beams to one another in the vehicle transverse direction. Here, the longitudinal beams or the cross beams are configured as a vehicle load-bearing structure as described above. In this regard, particular reference is made to a vehicle frame structure in which the longitudinal beams are each arranged laterally outside in the vehicle transverse direction. The application is particularly combined with a vehicle frame structure in which the longitudinal beams are arranged laterally outside to such an extent that they serve as lateral crash structures and should prevent the intrusion of obstacles acting laterally on the motor vehicle or should resist such intrusion as efficiently as possible.

[0020] In a further practical embodiment of the vehicle frame structure according to the application, the reinforcing element is arranged in the longitudinal beam in the vehicle transverse direction and / or is configured with a groove and / or a wave-shaped geometry which extends in the vehicle transverse direction at the reinforcing element. This arrangement or configuration is particularly suitable for stiffening the longitudinal beam in order to support forces acting on the vehicle from the side and from the outside in the vehicle transverse direction and to react to the bending of the respective vehicle load-bearing structure. Here, the groove and / or the wave-shaped geometry preferably extends over the entire width of the reinforcing element which extends in the vehicle transverse direction.

[0021] The vehicle frame structure according to the application has proven particularly useful in practice if the reinforcing element is arranged in a longitudinal beam section which extends at least partially in front of the wheelhouse of the vehicle viewed in the vehicle longitudinal direction and / or if the reinforcing element is arranged in a longitudinal beam section which extends between two cross beams viewed in the vehicle longitudinal direction. In most vehicles, the longitudinal beams each have a bend towards the inside of the vehicle in the wheelhouse region, so that the distance between the two outer longitudinal beams narrows. For this reason, the installation space is generally tighter in the region of the narrowing, which makes the arrangement of additional cross beams difficult. The advantages of the application come into play, inter alia, where a greater distance is provided (or must be provided) in the vehicle longitudinal beam between two cross beams. In such regions, the lateral stiffness in the longitudinal beam itself can be significantly improved by the arrangement of the reinforcing element, and a favourable force distribution from one longitudinal beam to one or more adjacent cross beams can be achieved by a suitable structural design of the reinforcing element.

[0022] In this regard, reference is made to the practical embodiment with at least one reinforcing element (or a plurality of reinforcing elements) which is used in the region between two cross beams which have a maximum distance of 500 mm from one another in the vehicle longitudinal direction.

[0023] An advantageous force distribution in the vehicle carrier structure according to the application can be achieved, inter alia, by providing a reinforcement structure which has a recessed and / or undulating geometry, said reinforcement structure having an orientation in the vehicle longitudinal direction in addition to an orientation in the vehicle transverse direction, which is oriented in the direction of the next cross beam. If the reinforcement structure is arranged in the longitudinal beam between two cross beams, viewed in the longitudinal direction, it is correspondingly advantageous, viewed from the outside towards the middle of the vehicle, for the V-shaped arrangement of two recesses or undulating geometries to be advantageous in order to transmit forces from the central region between the cross beams, as in a frame structure, through the recesses and / or undulations in the direction of the cross beams.

[0024] Advantages in connection with a vehicle carrier structure have been referred to, in particular in the form of two longitudinal beams which are arranged on the outside of the vehicle respectively, said longitudinal beams having a reduced distance from one another viewed in the vehicle transverse direction over a partial region and being connected by at least one cross beam. In this regard, reference is made once again, in particular, to such a vehicle frame structure formed by two longitudinal beams and two cross beams, in particular to such a vehicle frame structure in which at least one cross beam has a smaller width extending in the vehicle transverse direction, since said cross beam is located in a region with a reduced distance of the longitudinal beams.

[0025] If a battery receptacle structure is arranged in the region between the longitudinal beams viewed in the vehicle longitudinal direction, in particular a battery box for receiving a module of a traction battery, i.e. an energy store which is provided for supplying a motor vehicle with drive energy, the improved stiffness achieved by the design of the vehicle carrier structure and the vehicle frame structure according to the application is particularly advantageous. BRIEF DESCRIPTION OF DRAWINGS

[0026] Further practical embodiments of the application are described below in connection with the drawings. In the drawings:

[0027] Figure 1 A motor vehicle is shown in a view from above;

[0028] Figure 2 A motor vehicle is shown in a view from below Figure 1 The underside of a motor vehicle in a view from below in

[0029] Figure 3 A vehicle carrier structure according to the application in the form of a longitudinal beam arranged in the region marked with V in Figure 2 is shown in an isometric view;

[0030] Figure 4 The vehicle carrier structure in Figure 3 is shown in an isometric exploded view;

[0031] Figure 5 in a view from below Figure 3 and Figure 4 of the vehicle carrying structure in Figure 3 the area marked with V in which the reinforcing element is visible due to the transparent illustration of the shell element which covers the reinforcing element;

[0032] Figure 6a in an isometric view from the side showing only the reinforcing element of the vehicle carrying structure according to Figures 3 to 5 ;

[0033] Figure 6b in a view from the front showing only the reinforcing element of the vehicle carrying structure according to Figures 3 to 5 ;

[0034] Figure 7 in an isometric view showing the reinforcing element together with the transparently illustrated shell element connected thereto;

[0035] Figure 8 showing the vehicle carrying structure according to the view in Figure 5 in a load state loaded by a lateral force F;

[0036] Figure 9 showing a schematic longitudinal sectional view through an alternative embodiment of a vehicle carrying structure having a hollow space and a reinforcing element having a regular wave shape arranged in the hollow space, and

[0037] Figure 10 showing a schematic longitudinal sectional view through another alternative embodiment of a vehicle carrying structure having a hollow space and a reinforcing element having a regular V shape arranged in the hollow space. DETAILED DESCRIPTION

[0038] Figure 1 showing the motor vehicle 10 in a view from above. In Figure 1 and in all other views, the vehicle longitudinal direction (x direction) in which the vehicle is oriented forwards, the vehicle transverse direction (y direction) and the vehicle vertical direction (z direction) are marked with the arrows x, y and z. If only individual elements of the motor vehicle 10 are shown, the respective arrow relates to the respective mounting position in the motor vehicle 10.

[0039] Figure 2 showing Figure 1 the underside of the motor vehicle 10 in Figure 1 and 2The longitudinal beams 16 in the motor vehicle 10 shown in the figures are configured in the sense of the application as a vehicle load-bearing structure 20. Viewed in the vehicle longitudinal direction (x direction), the longitudinal beams 16 extend from the motor vehicle middle region between the front wheel arch and the rear wheel arch 12 over a length I indicated by double arrows up to the region of the rear wheel arch 12.

[0040] In Figure 2 addition, it can be seen in that the longitudinal beams 16 taper in the region of the rear wheel arch 12, i.e. the distance between the two longitudinal beams 16 decreases in the region of the rear wheel arch 12. The front cross beam 18 is for this reason somewhat longer than the rear cross beam 18. In the embodiment shown, the distance I of the cross beams 18 relative to one another is Q approximately 500 mm.

[0041] The application serves to improve the crash safety of a vehicle frame structure 14 in a motor vehicle 10, which has a vehicle load-bearing structure 20 with hollow profiles, which is designed, for example, like the longitudinal beams 16 as described in more detail below. The improvement in crash safety relates in particular to the case in which a side force F acts onto the longitudinal beams 16, which is, for example, Figure 2 the force F caused by a collision with a side barrier 22, which is indicated by an arrow in B or Figure 2 the force F caused by a collision with a pile 24, which is indicated by an arrow in P . As a result of this, the battery receptacle structure 44 for the traction battery or the fuel tank (indicated by a dashed box in Figure 2 ) is particularly protected in the region between the longitudinal beams 16. As a result, the risk of explosion, fire and / or fire is significantly reduced.

[0042] As can be seen very well from the overview in Figure 3 and Figure 4 , the base body of the longitudinal beam 16 is formed in the region relevant to the application from a total of four shell elements 26, i.e. from an upper shell 28, a lower shell 30, a first side shell 32 and a second side shell 34. The shell elements 26 are connected to one another, here by welding, to form a closed hollow profile. Inside the hollow space 46 formed by the hollow profile, a reinforcement element 36 is arranged (cf. Figure 3 and 5 ).

[0043] The reinforcement element 36 can only be seen partially in Figure 3 and 4 . In Figure 5 , the relative arrangement of the reinforcement element 36 within the hollow profile of the longitudinal beam 16 can be seen very well. In Figure 6a and 6b , the geometric design of the reinforcement element 36 itself can be seen very well. In Figure 6a and 6bAs can be seen very well in the middle, a plurality of grooves 38 extending over the entire width are configured at the reinforcing element 36. Between two adjacent grooves 38, respectively, a connecting section 40 is configured, wherein, in the embodiment shown, each connecting section 40 either has a flat surface or a curved surface. In all cases, however, the surface is a smooth surface. As a result, the reinforcing element 36 can be made relatively easily and cost- appropriately from a simple plate, which is brought to the desired shape by pressing the grooves 38.

[0044] As can be seen very well in the middle, a plurality of grooves 38 extending over the entire width are configured at the reinforcing element 36. Between two adjacent grooves 38, respectively, a connecting section 40 is configured, wherein, in the embodiment shown, each connecting section 40 either has a flat surface or a curved surface. In all cases, however, the surface is a smooth surface. As a result, the reinforcing element 36 can be made relatively easily and cost- appropriately from a simple plate, which is brought to the desired shape by pressing the grooves 38. Figure 6a and 6b As can be seen very well in the middle, a plurality of grooves 38 extending over the entire width are configured at the reinforcing element 36. Between two adjacent grooves 38, respectively, a connecting section 40 is configured, wherein, in the embodiment shown, each connecting section 40 either has a flat surface or a curved surface. In all cases, however, the surface is a smooth surface. As a result, the reinforcing element 36 can be made relatively easily and cost- appropriately from a simple plate, which is brought to the desired shape by pressing the grooves 38.

[0045] Preferably, the grooves 38 are configured such that they completely or at least largely fill the hollow space 46 in a direction transverse to the longitudinal direction, in particular in the vertical direction (z direction) of the motor vehicle 10. As a result, the torsional protection and the position fixing of the reinforcing element 36 within the hollow space 46 are optimized.

[0046] Figure 7 The reinforcing element 36 is shown together with the upper shell 28, wherein the reinforcing element 36 is shown in places covered by the upper shell 28 with dashed lines. The reinforcing element 36 at least partially abuts at the upper shell 28 with its connecting sections 40 and is connected to the upper shell 28 in material- locking fashion by a large number of weld points 42.

[0047] Figure 8 The arrangement of the reinforcing element 36 within the hollow space 46 of the longitudinal beam 16 and the functional principle and mode of action of the reinforcing element 36 when a lateral force F acting on the longitudinal beam 16 in the vehicle transverse direction is acting are shown. The lateral force F is first introduced laterally into the longitudinal beam 16 and is then guided through the shell element 26 and the reinforcing element 36 arranged within the shell element 26 into the cross beam 18 (cf. two arrows within the cross beam 18 in Figure 2 In this regard, the reinforcing element 36 in particular contributes to the longitudinal beam 16 not being bent even in the case of low loads in the vehicle transverse direction (y direction), but rather having a higher bending stiffness. The two outer grooves 38 and the corresponding lateral outer contour at the front end in the vehicle longitudinal direction and at the rear end in the vehicle longitudinal direction are arranged V-shaped from the outside to the inside in the vehicle transverse direction (y direction) such that the force introduced laterally into the longitudinal beam 16 is introduced in a truss-like manner outwards towards the cross beam 18. This is also shown in Figure 8 by the arrows F V and F HVisualisation.

[0048] In the embodiment shown in Figures 1 to 8 , the width of the reinforcing element 36 extending in the vehicle transverse direction precisely adapts to the width of the hollow space 46 of the longitudinal beam 16 over its entire length, which can be seen very well in Figure 8 . The three-dimensionality produced by the grooves 38 and the resulting wavelike geometry furthermore results in the reinforcing element 36 being arranged without play and torsionally fixed in the hollow space 46 of the longitudinal beam 16. Thereby it is ensured that forces are also transmitted by the reinforcing element 36 when the longitudinal beam 16 is loaded in the vehicle transverse direction (y direction) without the risk of the reinforcing element 36 being twisted. The additional torsionally fixed provision (optional) welds 42.

[0049] In Figure 9 and 10 two further alternative vehicle load-bearing structures 20 are shown in longitudinal sectional view. Here, the vehicle load-bearing structures are exemplarily shown as elements of one-piece construction. Alternatively, these vehicle load-bearing structures can also be formed from two or more shell units (not shown in Figure 9 and 10 ).

[0050] In Figure 9 , the reinforcing element 36 is shown with a regular wavelike geometry without discontinuities in the mathematical sense.

[0051] The reinforcing element 36 shown in Figure 10 has a wavelike geometry with blunt shaped angles and regularly configured grooves 38, two of which are shown, which have a regular V-shape.

[0052] Not only in the embodiment shown in Figure 9 but also in the embodiment shown in Figure 10 , the respective reinforcing element 36 preferably extends over the entire transverse direction within the hollow space 46 (i.e. into and out of the plane of the drawing, up to the respective transverse boundaries within the hollow space 46. As can be seen from the figures, the reinforcing element 36 is furthermore designed such that it extends completely from top to bottom within the hollow space 46 in the vertical direction (z direction) and is thus fixed within the hollow space 46 in the vertical direction and in the transverse direction. Due to the respective design, only a small (more precisely linear) contact surface 48 is obtained in the case of the arcuate wavelike geometry according to Figure 9 , whereas a large contact surface 48 is obtained in the case of the linear wavelike geometry according to Figure 10In the design according to Figure 2, a larger contact surface 48 is obtained in the region of the recess 38. In both cases, additional fastenings (for example welds) can be dispensed with. Alternatively, fastening can be carried out on the upper side and / or on the lower side, which is particularly advantageous when lateral accessibility is restricted or does not exist for structural space reasons.

[0053] The features of the present application disclosed in the specification, the drawings and the claims can be important both individually and in any combination for implementing the application in its different embodiments. The application can vary within the scope of the claims and in the light of the knowledge of the skilled person.

[0054] List of reference signs

[0055] 10 motor vehicle

[0056] 12 wheel housing

[0057] 14 vehicle frame structure

[0058] 16 longitudinal beam

[0059] 18 cross beam

[0060] 20 vehicle load-bearing structure

[0061] 22 side barrier

[0062] 24 post

[0063] 26 shell element

[0064] 28 upper shell

[0065] 30 lower shell

[0066] 32 side shell

[0067] 34 side shell

[0068] 36 reinforcing element

[0069] 38 recess

[0070] 40 connecting section

[0071] 42 weld

[0072] 44 battery receptacle

[0073] 46 hollow space

[0074] 48 contact surface

Claims

1. A vehicle load-bearing structure having a closed hollow profile, the hollow space of the hollow profile extending in a main direction called the longitudinal direction to the rear wheel arch (12), wherein, The hollow profile is formed by at least two interconnected shell elements (26). Its features are, A reinforcing element (36) having a three-dimensional geometry extending in the longitudinal and transverse directions of the vehicle is arranged in a torsional manner within the hollow space (46), wherein the reinforcing element (36) is formed of a plate-like element, wherein the reinforcing element (36) extends at least half of the corresponding transverse extension of the hollow space (46) in a direction transverse to the longitudinal direction of the hollow space (46), and wherein the reinforcing element (36) is materially fixed to one of the shell elements (26), wherein the reinforcing element (36) is arranged in a section of the vehicle load-bearing structure that extends between two crossbeams (18) when viewed in the longitudinal direction of the vehicle.

2. The vehicle load-bearing structure according to the preceding claim, characterized in that, At least one groove (38) and / or a wavy geometry are constructed at the reinforcing element (36).

3. The vehicle load-bearing structure according to any one of the preceding claims, characterized in that, The hollow profile and / or the reinforcing element (36) are made of weldable material and / or metallic material.

4. The vehicle load-bearing structure according to the preceding claim, characterized in that, The reinforcing element (36) is fixed in the hollow space (46) in a material-compatible, force-compatible, and / or shape-compatible manner.

5. The vehicle load-bearing structure according to any one of the preceding claims, characterized in that, The reinforcing element (36) is constructed such that it is arranged without gaps in the hollow space (46).

6. The vehicle load-bearing structure according to any one of the preceding claims, characterized in that, The reinforcing element (36) is positioned in a predetermined location in the hollow profile in a torsion-resistant and / or position-fixed manner due to its three-dimensional geometry and its interaction with the internal geometry of the hollow profile.

7. The vehicle load-bearing structure according to any one of the preceding claims, characterized in that, The reinforcing element has at least one contact portion with the hollow profile, the contact portion being spaced apart from the lateral edge of the reinforcing element.

8. A vehicle frame structure having at least two lateral longitudinal beams (16) extending in the longitudinal direction of the vehicle and at least one transverse beam (18) connecting the longitudinal beams (16) to each other in the transverse direction of the vehicle. Its features are, At least one longitudinal beam (16) or transverse beam (18) is configured as a vehicle load-bearing structure according to any one of claims 1 to 7.

9. The vehicle frame structure according to the preceding claim, characterized in that, The longitudinal beams (16) are respectively arranged on the outer side in the transverse direction of the vehicle, and at least one longitudinal beam (16) is configured as a vehicle load-bearing structure (20) according to any one of claims 1 to 6.

10. The vehicle frame structure according to any one of the preceding two claims, characterized in that, The reinforcing element (36) is arranged in a longitudinal beam section that extends at least partially before the wheel arch (12) when viewed in the longitudinal direction of the vehicle, and / or the reinforcing element (36) is arranged in a longitudinal beam section that extends between two crossbeams (18) when viewed in the longitudinal direction of the vehicle.

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