Component arrangement for a motor vehicle, method for producing such a component arrangement and method for dismantling a component arrangement

Abstract

The invention relates to a component arrangement (1) for a motor vehicle (16), comprising a first component (2), a second component (3) which is spaced from the first component (2) at least in regions by a gap (4) and is integrally connected to the first component (2) by an adhesive layer (5) present in the gap (4), and an expansion element (6) arranged in the gap (4), which expansion element is intended and designed to force the components (2, 3) away from one another by expansion and to release the integral connection. It is provided that the expansion element (6) is designed as a flat expansion cushion. The invention further relates to a method for producing a component arrangement (1) for a motor vehicle (16) and to a method for dismantling a component arrangement (1) for a motor vehicle (16).

Description

[0001] The invention relates to a component arrangement for a motor vehicle, comprising a first component, a second component which is spaced from the first component at least in regions by a gap and is integrally connected to the first component by an adhesive layer present in the gap, and an expansion element arranged in the gap, which is provided and designed to force the components away from one another by expansion and to release the integral connection. The invention further relates to a method for producing a component arrangement for a motor vehicle and to a method for dismantling a component arrangement for a motor vehicle.

[0002] For example, DE 197 54 814 A1 is known from the prior art. This document relates to a device for removing a window pane from its frame. An inflatable pressure hose is arranged between the frame and the window, which, when inflated, pushes the window pane out of the frame. To ensure safe and smooth removal of the window pane from the frame, the pressure hose is to consist of a high-strength or low-stretch flexible casing and an airtight inner tube.

[0003] DE 39 25 430 A1 also discloses a locking mechanism for a window pane in a vehicle window opening that can be used as an emergency exit. The window pane is secured to the vehicle door via a holder that is at least operatively connected to a deformable, gas-fillable hollow body, which is released when the hollow body is inflated.

[0004] Furthermore, the document DE 197 33 034 A1 discloses a device for removing a window pane of a motor vehicle as an emergency exit. In order to be able to install such a device in a motor vehicle in a structurally simple manner and so that such a device can also provide an emergency exit for injured vehicle occupants, the device comprises at least one explosively inflatable gas bag arranged between a vehicle-side frame and the window pane attached thereto, at least one pyrotechnic gas generator connected to the gas bag, an ignition unit connected to the gas generator for igniting the gas generator, and at least one sensor connected to the ignition unit for triggering the device.

[0005] Finally, the document US 2020 / 0 198 707 A1 discloses a system with connected body elements, comprising a first body element and a second body element. The first body element has a channel, with a shoulder formed adjacent to the channel. The system further comprises an adhesive which is applied at least partially in the channel and at least partially on the shoulder and adhesively connects the first body element to the second body element. A connecting region of the surface of the first body element immediately adjacent to the shoulder is free of adhesive at this point. A first space between the shoulder and the second body element and a second space between the connecting region and the second body element are arranged open to one another.

[0006] It is an object of the invention to propose a component arrangement for a motor vehicle which has advantages over known component arrangements, in particular enabling simple separation of the components of the component arrangement from one another and thus improving the recyclability of the component arrangement.

[0007] This is achieved according to the invention with a component arrangement for a motor vehicle having the features of claim 1. It is provided that the expansion element is designed as a flat expansion cushion.

[0008] Advantageous embodiments with useful further developments of the invention are specified in the dependent claims. It should be noted that the exemplary embodiments explained in the description are not limiting; rather, any variations of the features disclosed in the description, the claims, and the figures are feasible.

[0009] The component arrangement is preferably a component of the motor vehicle, but it can of course also be separate from it, in particular until the component arrangement is mounted in or on the motor vehicle. In any case, the component arrangement has a plurality of components, namely the first component and the second component. The gap is present at least in some areas between the two components, so that they are at least partially spaced from one another and do not lie directly against one another. An adhesive is arranged in the gap in order to bond the two components together. The adhesive forms the adhesive layer present in the gap and engages the first component on the one hand and the second component on the other, so that the two components are fastened to one another by means of the adhesive or the adhesive layer formed by it.

[0010] For example, the two components are each part of a body of the motor vehicle and / or a chassis of the motor vehicle and / or a traction battery of the motor vehicle. The body is preferably designed as a self-supporting body, so that it is composed of the chassis and a structure of the motor vehicle. The traction battery is to be understood as an electrical energy storage device that is electrically connected to a drive device of the motor vehicle. The drive device serves, at least temporarily, to drive the motor vehicle, thus providing a drive torque directed towards driving the motor vehicle. To provide the drive torque, the drive device has at least one drive unit, which in the present case is an electric traction machine that is electrically connected to the traction battery.To provide the drive torque, the traction motor is at least temporarily supplied with electrical energy stored in the traction battery. Conversely, it can be provided that electrical energy generated by the traction motor is fed to the traction battery for intermediate storage.

[0011] In a preferred embodiment, the components of the component arrangement consist at least partially of the same material, in particular of metal and / or plastic, or they each comprise at least one of these materials. However, it can also be provided that one of the components consists of metal or plastic or comprises one of these materials, and the other of the components consists of the other material, i.e., of plastic or metal, or comprises one of these materials.

[0012] The gap in which the adhesive layer is arranged has a specific gap depth which corresponds to the distance between the two components. Since the gap, viewed in section from the first component to the second component, is completely filled with the adhesive, the adhesive layer has a layer thickness which corresponds to the gap depth and thus the distance between the two components. Preferably, the first component has a first adhesive surface facing the second component and the second component has a second adhesive surface facing the first component, with the adhesive layer acting on the one hand on the first adhesive surface and on the other hand on the second adhesive surface. Preferably, the two adhesive surfaces, i.e. the first adhesive surface and the second adhesive surface, are arranged parallel and spaced apart from one another, at least in some regions.

[0013] A center plane of the gap or adhesive layer is located centrally in the gap and / or in the adhesive layer and consequently centrally between the two adhesive surfaces. The center plane is preferably arranged at a continuous distance from the two components, at least across the adhesive layer. Away from the adhesive layer, the center plane can intersect one of the components. A direction in which the gap depth or the layer thickness of the adhesive layer is present is in particular perpendicular to the center plane. Two further directions are perpendicular to this direction, which are also perpendicular to one another and which each run parallel to the center plane, in particular each lie completely in the center plane.

[0014] In at least one of the latter directions, preferably in both of these directions, the adhesive layer has dimensions that are greater than the layer thickness, preferably by a factor of at least 2, at least 5, or at least 10. This means that the adhesive layer has a greater extent in the lateral directions, which run parallel to the center plane, than in the vertical direction, which is perpendicular to the center plane. The adhesive layer therefore does not merely form a local bond, but rather a flat bond over a large area.

[0015] Such a surface bond is comparatively difficult to remove after it has been created, meaning that the two components cannot be separated again, or can only be separated with considerable effort. Accordingly, the recyclability of the component assembly is low, and the cost of recycling it is high. For this reason, the expansion element should be located in the gap. This serves to separate the two components from each other after they have been joined, preferably during disassembly of the component assembly or the motor vehicle.

[0016] The two components are separated from one another by supplying a fluid, in particular a gaseous or liquid fluid, to the expansion element, which expands the expansion element so that its external dimensions increase in at least one direction. The expansion element is arranged and designed such that as it expands it pushes the two components away from one another, so that the distance between the two components increases. This breaks the material connection between the two components, namely by breaking up the adhesive or the adhesive layer. After this breaking up of the adhesive layer, it is possible to finally separate the two components from one another with comparatively little effort, so that they can, for example, be recycled separately.

[0017] The expansion element is temporarily in a non-expanded first state and temporarily in an expanded second state. The first state is maintained as long as the two components are to remain attached to each other. If the components are to be separated, the expansion element is converted from its first state to its second state, in particular by supplying fluid to the expansion element.

[0018] The expansion element has, for example, a first outer surface facing the first component and a second outer surface facing the second component. Provision can be made for the expansion element to be fully embedded in the adhesive layer, such that the first outer surface is spaced from the first component and the second outer surface is spaced from the second component. Alternatively, provision can be made for the expansion element to bear against one of the components and to be spaced from the other of the components. Alternatively, the expansion element bears against both the first component and the second component.

[0019] Preferably, at least one of the outer surfaces or both outer surfaces are flat across the entire expansion element as long as the expansion element is in its first state. When the expansion element is expanded, i.e., in its second state, the at least one outer surface is deformed, in particular, it is curved.

[0020] As a result, the dimensions of the expansion element increase in at least one direction, so that the integral connection between the components is reliably released. A particularly preferred embodiment of the expansion element is one in which the expansion element, or one or both of its outer surfaces, has a surface structure designed to improve adhesion. The surface structure is designed in such a way that the integral connection between the adhesive layer is improved. Accordingly, it can also be referred to as an adhesive structure.

[0021] For example, the surface structure has a plurality of structural elements, in particular a plurality of projections encompassed by the adhesive layer and / or a plurality of depressions accommodating the adhesive layer. The surface structure can be a roughness structure with a specific roughness or roughness, wherein the roughness structure is characterized by an irregular configuration. Alternatively, however, the surface structure can also have a uniform configuration in which the structural elements are arranged according to a pattern.

[0022] In order to be able to use the expansion element in the context of the above-described material-to-material connection between the two components, it is designed to be flat or cushion-shaped, thus serving as an expansion cushion. This means that the expansion element has comparatively large dimensions in the lateral direction, i.e., in at least one direction parallel to the center plane, compared to its dimensions in the vertical direction, so that when the expansion element expands, the two components are pushed apart from each other in a flat manner, reliably breaking up the adhesive layer.

[0023] Due to the flat design of the expansion element, only low compressive forces act on the two components during expansion, so that the surface pressure is low compared to a smaller expansion element, and damage or even deformation of the two components is reliably avoided. Rather, the two components are simply separated from each other, leaving them undamaged. The expansion element is therefore designed and constructed for damage-free release of the material connection. This results in the advantages already mentioned.

[0024] A further development of the invention provides that the expansion element has larger dimensions in at least one first direction, which runs parallel to a central plane penetrating the center of the gap, than in a second direction perpendicular to the central plane. The definition of the central plane as well as the first direction and the second direction has already been mentioned. The first direction or the perpendicular first directions are each parallel to the central plane arranged centrally in the gap, in particular they lie in the central plane. The second direction is perpendicular to the central plane and therefore also to the first direction or directions. In at least one first direction, but preferably in both first directions, the expansion element has larger dimensions than in the second direction, so that the flat design is implemented in a structurally simple manner.

[0025] A further development of the invention provides that a region enclosing the expansion element has dimensions in two mutually perpendicular directions, each parallel to the center plane, of at least the dimensions of the expansion element in the respective direction plus a gap depth of the gap in a direction perpendicular to the center plane, and that the gap has a gap depth across the region that changes by a maximum of 20%, a maximum of 10%, or a maximum of 5%. In other words, the expansion element is located in the region of the adhesive layer over which the gap depth or layer thickness does not change or changes only slightly.

[0026] The region has specific dimensions in directions perpendicular to one another and parallel to or within the center plane. These dimensions correspond to the dimensions of the expansion element in the respective direction plus the gap depth, preferably plus the gap depth multiplied by a factor of at least 2, at least 5, or at least 10. The region always encloses the expansion element, i.e., the expansion element is arranged entirely within the region, particularly centrally. The gap depth around the expansion element does not change, or at most changes slightly, namely within the stated values. This ensures reliable separation of the two components from one another with low surface pressure.

[0027] A further development of the invention provides that the expansion element has two plate-shaped parts joined at the edges. The parts are joined together at their edges, for example, by a material fit and / or a form-fitting connection. Away from their edges, the parts are preferably flat, in particular continuous, at least on the side facing the nearest component. The edges of the parts are connected, for example, by a material fit by welding, soldering or gluing and / or by a form-fitting connection, in particular by forming joining, for example, by flanging, folding, clinching or the like. In any case, the two parts are connected to one another in a fluid-tight manner via their edges. This provides a simple way of achieving the flat design of the expansion element as an expansion cushion.

[0028] A further development of the invention provides that the parts are made of metal or at least comprise metal. The expansion element is thus made of metal, at least in part, namely the metallic parts. The metal used can be steel, preferably stainless steel, aluminum, an aluminum alloy, or the like. The use of metal for the expansion element has the advantage of high strength of the adhesive layer, since this is not compromised by the embedding of an elastic element.

[0029] A further development of the invention provides that an interior of the expansion element is filled with a filling material that connects the parts to one another, in particular fastens them to one another in a materially bonded manner. The interior is preferably completely filled with the filling material, so that the filling material rests against the parts of the expansion element on opposite sides. The filling material is preferably a material that, on the one hand, reliably ensures easy expansion of the expansion element and, on the other hand, avoids any impairment of the strength of the adhesive layer. For this purpose, it is provided, for example, that the filling material engages the parts of the expansion element in a materially bonded manner. For this purpose, an adhesive is used in particular as the filling material, wherein this adhesive has a lower strength than the adhesive of the adhesive layer. For example, the filling material is an adhesive pad.This ensures that the material connection between the components can be separated and that the connection is highly rigid.

[0030] A further development of the invention provides that the interior space can be supplied with a fluid via a fluid connection of the expansion element to expand the expansion element. The expansion element has the fluid connection, which is fluidly connected to the interior space. The fluid can be supplied to the interior space via the fluid connection in such a way that the expansion element widens or expands, and the two components are accordingly forced apart to release their connection.

[0031] For example, a fluid line, in particular a flexible hose line, is connected to the fluid connection. The fluid line is led out of the adhesive layer and is therefore accessible from outside the adhesive layer. It can also be provided that the fluid line extends through one of the components, in particular is arranged in a recess in the component, so that the fluid can be introduced into the expansion element through the fluid line from a side of the component facing away from the adhesive layer. Preferably, a fluid coupling for connecting a fluid source is arranged and / or fastened to the component and is fluidically connected to the fluid line. The described embodiment enables easy handling of the expansion element, in particular during disassembly of the component arrangement.

[0032] A further development of the invention provides that the expansion element is configured such that, upon expansion, its dimensions increase in the second direction and decrease in the at least one first direction, so that the components are pushed apart and a cavity is formed in the adhesive layer, released by the expansion element. The two directions are preferably perpendicular to one another. The second direction is, in particular, the direction perpendicular to the central plane, whereas the at least one first direction is completely contained in the central plane or runs parallel to it.

[0033] The expansion of the expansion element occurs in such a way that, by expanding the expansion element in the second direction, the two components are pushed apart in order to release the material connection between them. At the same time, the expansion in the second direction reduces the dimensions of the expansion element in at least one first direction, in particular in several mutually perpendicular first directions. Accordingly, the expansion element releases the cavity that is not filled with the adhesive. This further simplifies the separation of the two components from each other.

[0034] A further development of the invention provides that at least one fluid channel is created in the filler material. The fluid channel is fluidically connected to the fluid connection, in particular, it borders on it within the expansion element. Fluid introduced into the expansion element through the fluid connection consequently flows along the fluid channel through the expansion element. The fluid channel, for example, completely penetrates the filler material in one direction; in particular, it is open at both edges in the filler material. This means, for example, that it is bordered on opposite sides by the preferably plate-shaped parts of the expansion element.

[0035] However, it can alternatively also be provided that the fluid channel is enclosed in the filler material at its edges, i.e., is bounded by the filler material in at least one imaginary plane. In a further alternative, the fluid channel is designed as a recess in the filler material, so that it extends through the filler material only on one side and has a base formed by the filler material on the other side. In any case, the fluid channel is preferably closed at its end, i.e., on the side facing away from the fluid connection.

[0036] It can be provided that the fluid channel is produced by punching the filler material, for example if this is present as an adhesive pad. However, it can also be provided that the fluid channel is formed by producing an adhesive bead in the expansion element. The fluid channel has a length which preferably corresponds to at least 40%, at least 50% or at least 60% of a maximum extension of the expansion element, so that the fluid channel penetrates the expansion element to a relevant extent. The fluid channel is, for example, designed in a meandering shape so that it has a length which is greater than 50% of the maximum extension of the expansion element. Preferably, the fluid channel has a volume which is smaller than a volume of the filler material. In particular, the volume of the fluid channel is at most 15%, at most 10% or at most 5% of the volume of the filler material.

[0037] For example, the fluid channel passes through the expansion element in a first region in a first direction to at least 70%, at least 80% or at least 90%. This first region is followed by a reversal region in which the fluid channel changes direction and runs at least partially in a second direction arranged perpendicular to the first direction. The reversal region is followed by a second region in which the fluid channel again passes through the expansion element in the first direction to at least 70%, at least 80% or at least 90%. The second region is arranged at a distance from the first region, in particular in the second direction. The fluid channel preferably has a plurality of repetitions of the first region, the reversal region and the second region. The second region is followed by another reversal region, which is followed by a further first region, and so on.

[0038] Particularly preferably, there are multiple fluid channels, each of which can be configured as described, for example, exactly two or exactly three fluid channels. The multiple fluid channels are each connected to the fluid connection, for example, they each originate from it and preferably extend in opposite directions. In particular, the multiple fluid channels each run in a meandering pattern. The fluid channel or multiple fluid channels ensure that the fluid can flow into the expansion element, thus ensuring reliable and uniform expansion and forcing the components apart.

[0039] The invention naturally also relates to a motor vehicle with a component arrangement, namely a component arrangement according to the statements in this description. Regarding the advantages and possible advantageous developments of the motor vehicle or the component arrangement, reference is made in full to the description.

[0040] The invention further relates to a method for producing a component arrangement for a motor vehicle, in particular a component arrangement according to the embodiments within the scope of this description, wherein the component arrangement has a first component and a second component which is spaced from the first component at least in regions by a gap and is integrally connected to the first component by an adhesive layer present in the gap, wherein an expansion element is arranged in the gap and is intended and designed to force the components away from one another by expansion and to release the integral connection. It is provided that the expansion element is designed as a flat expansion cushion.

[0041] The advantages of such a procedure or such a design of the component arrangement have already been pointed out. Both the component arrangement and the method for its manufacture can be further developed according to the explanations in this description, so reference is made to these in this regard.

[0042] The invention also relates to a method for dismantling a component arrangement for a motor vehicle, in particular a component arrangement according to this description, wherein the component arrangement comprises a first component, a second component which is spaced from the first component at least in regions by a gap and is integrally connected to the first component by an adhesive layer present in the gap, and an expansion element arranged in the gap, which is expanded by exposure to fluid and, as a result of the expansion, forces the components away from one another and releases the integral connection. It is provided that the expansion element is designed as a flat expansion cushion.

[0043] Again, with regard to the advantages and possible benefits of further training, reference is made to the explanations in this description.

[0044] The features and feature combinations described in the description, in particular the features and feature combinations described in the following description of the figures and / or shown in the figures, can be used not only in the respective combination specified, but also in other combinations or on their own, without departing from the scope of the invention. Thus, embodiments are also to be considered encompassed by the invention that are not explicitly shown or explained in the description and / or the figures, but which emerge from or can be derived from the explained embodiments.

[0045] The invention will be explained in more detail below with reference to the exemplary embodiments shown in the drawings, without limiting the invention. In the drawings: Fig. 1 a schematic representation of a component arrangement for a motor vehicle with an expansion element in a first state, Fig. 2 a schematic representation of the component arrangement with the expansion element in a second state, and Fig. 3 a schematic representation of a motor vehicle with an exemplary embodiment of the component arrangement as a motor vehicle component arrangement.

[0046] The Fig. 1 shows a schematic representation of a component arrangement 1, which is used, for example, for a motor vehicle. The component arrangement 1 has a first component 2 and a second component 3, which are only shown in part, namely in a region in which they are integrally connected to one another. Between the components 2 and 3 there is a gap 4, in which an adhesive layer 5 is produced for the integral connection of the two components 2 and 3. An expansion element 6 is arranged in the gap 4 or in the adhesive layer 5. The expansion element 6 serves to release the integral connection between the components 2 and 3 by forcing them away from one another by the expansion element 6.

[0047] The expansion element 6 is shown in a first state in which it is not expanded, i.e., has smaller dimensions. The first state is an initial state of the expansion element 6, in which it is arranged in the gap 4 or in the adhesive layer 5 during the manufacture of the component assembly 1. An imaginary center plane 7 passes through the center of the gap 4. In the exemplary embodiment shown here, the center plane 7 is arranged parallel to the two components 2 and 3. An imaginary axis 8 is perpendicular to the center plane 7.

[0048] The expansion element 6 is in the form of an expansion cushion and is correspondingly flat. It therefore has larger dimensions in at least one first direction, which lies entirely in the imaginary central plane 7 or is arranged parallel to it, than in a second direction running in the direction of the axis 8. For example, the expansion element 6 is composed of two plate-shaped parts 9 and 10, which are joined together at their edges, preferably in a form-fitting and / or material-fitting manner. The two parts 9 and 10 together enclose an interior space 11 in which a filling material 12 is present. It can be seen that outer surfaces 13 and 14 of the expansion element 6, which face the components 2 and 3, are flat in the first state of the expansion element 6, resulting in a rectangular shape of the expansion element 6 in cross-section.

[0049] The Fig. Figure 2 again shows a schematic representation of the component arrangement 1, but with the expansion element 6 in a second state in which it has expanded. It can be clearly seen that the expansion element 6 has expanded in the direction of the axis 8 due to the expansion, whereas it has smaller dimensions in the direction lying in the center plane 7 than in the first state. Accordingly, the expansion of the expansion element 6 creates at least one cavity 15 in the adhesive layer 5.

[0050] Preferably, several cavities 15 are created on opposite sides of the expansion element 6, or a continuous cavity 15 is created, for example, in a ring shape, which surrounds the expansion element 6. The expansion of the expansion element 6 creates, on the one hand, at least one cavity 15, and, on the other hand, forces the components 2 and 3 away from each other, namely in the direction of the axis 8. This locally breaks open the adhesive layer 5, so that the two components 2 and 3 can subsequently be separated from each other relatively easily.

[0051] The Fig.3 shows a schematic representation of a motor vehicle 16 having multiple component arrangements 1. The motor vehicle 16 has, for example, multiple motor vehicle components 17, 18, and 19, wherein the motor vehicle component 17 is, for example, a front-end component, the motor vehicle component 18 is an underbody component, and the motor vehicle component 19 is a rear-end component. The motor vehicle component 18 is integrally connected to each of the motor vehicle components 17 and 19, namely via a respective adhesive layer 5. Each of the motor vehicle components 17 and 19 thus represents a first component 2, whereas the motor vehicle component 18 is always configured as a second component 3.

[0052] One of several expansion elements 6 is arranged in each of the adhesive layers 5 in order to be able to reliably separate the motor vehicle components 17, 18 and 19 from one another, in particular during disassembly of the motor vehicle 16. For example, a fluid line is led out of the respective expansion element 6, which protrudes from the adhesive layer 5 on its side facing away from the expansion element 6 and can be supplied with fluid from there. Due to the resulting expansion of the expansion element 6, the components 2 and 3 or the motor vehicle components 17, 18 and 19 are pushed away from one another and, at the same time, the respective adhesive layer 5 is broken open. Accordingly, the materially bonded connection between motor vehicle components 17, 18 and 19 is reliably released, resulting in good recyclability of the component arrangement 1 or the motor vehicle 16. LIST OF REFERENCE SYMBOLS: 1 Component arrangement 2 1. Component 3 2nd component 4 gap 5 adhesive layer 6 Expansion element 7 Middle level 8 axis Part 9 10 part 11 Interior 12 Filling material 13 Exterior area 14 Exterior surface 15 Cavity 16 motor vehicle 17 Motor vehicle component 18 Motor vehicle component 19 Motor vehicle component

Claims

[1] Component arrangement (1) for a motor vehicle (16), comprising a first component (2), a second component (3) which is spaced apart from the first component (2) at least in regions by a gap (4) and is integrally connected to the first component (2) by an adhesive layer (5) present in the gap (4), and an expansion element (6) arranged in the gap (4), which expansion element is provided and designed to force the components (2, 3) away from one another by expansion and to release the integral connection, characterized by that the expansion element (6) is designed as a flat expansion cushion. [2] Component arrangement according to claim 1, characterized by that the expansion element (6) has larger dimensions in at least one first direction, which runs parallel to a central plane (7) passing through the center of the gap (4), than in a second direction perpendicular to the central plane (7). [3] Component arrangement according to one of the preceding claims, characterized by that a region enclosing the expansion element (6) has dimensions in two directions perpendicular to one another and each running parallel to the center plane (7) of at least the dimensions of the expansion element (6) in the respective direction plus a gap depth of the gap (4) in a direction perpendicular to the center plane (7), and the gap (4) has a gap depth over the region which changes by at most 20%, at most 10% or at most 5%. [4] Component arrangement according to one of the preceding claims, characterized by that the expansion element (6) has two plate-shaped parts (9, 10) joined at the edges. [5] Component arrangement according to one of the preceding claims, characterized by that the parts (9, 10) consist of metal or at least comprise metal. [6] Component arrangement according to one of the preceding claims, characterized by that an interior space (11) of the expansion element (6) is filled with a filling material (12) which connects the parts (9, 10) to one another. [7] Component arrangement according to one of the preceding claims, characterized by that the interior (11) can be supplied with a fluid via a fluid connection of the expansion element (6) for expanding the expansion element (6). [8] Component arrangement according to claim 2, characterized by that the expansion element (6) is designed such that during expansion its dimensions increase in the second direction and decrease in the at least one first direction, so that the components (2, 3) are pushed away from one another and a cavity (15) released by the expansion element (6) is formed in the adhesive layer (5). [9] Method for producing a component arrangement (1) for a motor vehicle (16) according to one or more of the preceding claims, wherein the component arrangement (1) has a first component (2) and a second component (3) which is spaced from the first component (2) at least in regions by a gap (4) and is integrally connected to the first component (2) by an adhesive layer (5) present in the gap (4), wherein an expansion element (6) is arranged in the gap (4), which expansion element is provided and designed to force the components (2, 3) away from one another by expansion and to release the integral connection, characterized by that the expansion element (6) is designed as a flat expansion cushion. [10] Method for dismantling a component arrangement (1) for a motor vehicle (16) according to one or more of claims 1 to 8, wherein the component arrangement (1) has a first component (2), a second component (3) which is spaced from the first component (2) at least in regions by a gap (4) and is integrally connected to the first component (2) by an adhesive layer (5) present in the gap (4), and an expansion element (6) arranged in the gap (4), which is expanded by the application of fluid and, by expanding, forces the components (2, 3) away from one another and releases the integral connection, characterized by that the expansion element (6) is designed as a flat expansion cushion.

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