System comprising a platform component and an add-on component of a motor vehicle, a motor vehicle having such a system, and a method

Abstract

The present invention relates to a system (100) comprising a platform component (10) and an add-on component (11) of a motor vehicle (25), wherein the platform component (10) and the add-on component (11) are connected to one another in at least one first region (12) by means of a non-positive connection and in at least one second region (13) by means of a material-bonded connection. The invention further relates to a motor vehicle (25) having such a system, and to a method for producing such a system.

Description

[0001] Description

[0002] System consisting of a platform component and an attachment component of a motor vehicle, a motor vehicle with such a system, and a method

[0003] The present invention relates to a system comprising a platform component and an attachment component for a motor vehicle. The invention further relates to a motor vehicle with such a system and to a method.

[0004] Known systems consisting of a platform component and an add-on component of a motor vehicle, joined by an adhesive bond and a screw connection, and known methods for joining such a system, have the disadvantage that the adhesive bead is laid on the same plane as the screw connection. This can cause adhesive to leak uncontrollably through the screw hole or at the component edges during assembly, leading to contamination of the system and the joining tool. Furthermore, adhesive can enter the threads of the screw hole, affecting thread friction. Due to its high viscosity and the resulting pasty consistency, which is displaced more or less uncontrollably when the components are joined, the adhesive makes it difficult to automatically set the target torque of the screw connection.Due to the gravity-dependent flow behavior of the adhesive, a constant clamping force is difficult to achieve or reproduce. Furthermore, if the adhesive bond is interrupted by screw holes, it cannot simultaneously provide a seal. Therefore, established systems utilize additional sealing measures to achieve a watertight seal, such as sealing tapes, polyvinyl chloride seams, or expanding sealants. This necessitates additional process steps. Moreover, the required sealants do not contribute to the structural and mechanical strength of the system.

[0005] It is therefore an object of the present invention to overcome, or at least partially overcome, the disadvantages of known systems consisting of a platform component and an add-on component of a motor vehicle, as described above. In particular, it is an object of the present invention to provide a system consisting of a platform component and an add-on component of a motor vehicle, a motor vehicle with such a system, and a method for joining such a system, which in a cost-effective manner create a simple, efficient, and reliable connection method that ensures the mechanical stability of the system and simultaneously enables a seal of the system. The foregoing object is achieved by the claims.Accordingly, the problem is solved by a system consisting of a platform component and an attachment component of a motor vehicle with the features of independent claim 1, by a motor vehicle with such a system with the features of dependent claim 12, and by a method for joining such a system with the features of dependent claim 13.

[0006] Further features and details of the invention will become apparent from the dependent claims, the description, and the drawings. Features and details described in connection with the system according to the invention naturally also apply in connection with the motor vehicle according to the invention with such a system, as well as with the method according to the invention for joining such a system, so that with regard to the disclosure of the individual aspects of the invention, there is always, or can always be, a reciprocal reference to the invention.

[0007] According to a first aspect of the invention, the problem is solved by a system comprising a platform component and an attachment component of a motor vehicle. The platform component and the attachment component of the system are connected to each other in at least a first region by means of a force-fit connection and in at least a second region by means of a material-fit connection. In the at least one first region, the platform component and the attachment component rest against each other on a common contact surface without a gap. The platform component and the attachment component are connected in the at least one first region by at least one screw connection. In the at least one second region, the platform component has a stepped, preferably parallel, surface relative to the contact surface.The attachment component is positioned at least partially above the stepped surface, spaced apart from it, to form a cavity between the attachment component and the platform component. An adhesive is placed within this cavity to bond the attachment component and the platform component together. The at least one screw connection is spaced apart from the cavity.

[0008] In other words, the system is a joining connection of two components of a motor vehicle, in particular a joining connection of two body components, preferably with a sill of a motor vehicle as a platform component and a side panel of a motor vehicle as an add-on component, by means of at least one screw connection in at least a first area and by means of at least one adhesive connection in a second area, wherein the at least one screw connection is spatially structurally separated from the at least one adhesive connection.The platform component and the attachment component are designed and arranged relative to each other in such a way that, in at least one first region of the force-fit connection, the components to be joined are screwed to a common contact surface flush against a stop without a gap, and in at least one second region, a cavity, in particular a gap or a hollow space with preferably partially or completely limited volume, forms between the platform component and the attachment component, in which the adhesive is located that bonds the platform component and the attachment component together by means of an adhesive connection. The common contact surface in the at least one first region is preferably designed as a screw plane. The stepped, and in particular parallel, surface in the at least one second region is preferably designed as an adhesive plane.In other words, the adhesive layer is preferably parallel to the screw plane and offset vertically. Furthermore, the adhesive layer can be spaced horizontally from the screw plane. The system can also include a plastic covering on the attachment.

[0009] An advantage of the system lies in the fact that the screw connection in the at least one first area is not influenced or hindered by the adhesive of the bonded joint in the at least one second area, thus ensuring a secure, reproducible, and high mechanical stability of the force-fit connection. This is achieved by the system according to the invention by preventing the adhesive, which is applied to the adhesive surface before the two components are joined, from entering the screw plane—i.e., a screw hole, through hole, blind hole, or thread of the force-fit connection—from the at least one stepped second area. The stepped surface and the resulting cavity for the adhesive ensure a spatial separation of the second area (i.e., the adhesive area) from the first area (i.e., the screw connections).This prevents the adhesive from influencing the target torque of the screw connection, for example, through thread friction in the screw connection. In an automated process, the system according to the invention can thus ensure that a constant and reproducible target torque of the screw connections can be automatically set, thereby guaranteeing the mechanical stability of the force-fit connection of the system.

[0010] Furthermore, the system according to the invention ensures that the adhesive is displaced in a controlled manner by the design of the stepped surface of the platform component and the cavity of the system, thus preventing contamination of the system or the tool used to join the system due to uncontrolled adhesive leakage at component edges or through a screw hole, through hole, blind hole, or thread of the force-fit connection. This eliminates the need for additional, costly process steps for cleaning the system or the tools used.

[0011] The force-fit connection in the at least one first area is achieved according to the invention by means of a screw connection, wherein in the at least one

[0012] In the first area, the platform component and the attachment component lie flush against each other on a common contact surface without any gap. Such a friction-fit connection has the advantage of achieving a tight seal on the contact surface, providing protection against the ingress of dust, dirt, liquids, or other foreign substances. The mechanical force between the attachment component and the platform component can be precisely adjusted by the torque of the screw connection, enabling precise control of the friction-fit connection and thus representing a simple, efficient, and reliable connection method. In at least one area of ​​the friction-fit connection, the attachment component preferably has a through hole, and the platform component preferably has a through hole or blind hole for the screw connection.The advantage of a blind hole in the platform component is that the screw connection is sealed to the closed side of the blind hole. The through hole is advantageously designed so that no leaks are created in the system through the through hole. Furthermore, the through hole or blind hole of the platform component has, for example, a threaded section, a threaded insert, or similar feature for the screw connection, particularly on the screw-in side, especially a nut thread. The threaded section or insert enables a precise and durable threaded connection. Alternatively, the screw of the screw connection can be a thread-forming screw. The use of a thread-forming screw eliminates the need for additional threading and simplifies the assembly process.The screw of the bolted connection can be sealed on the clamping side; preferably, the screw has an underhead seal, for example, an aluminum washer. Sealing the screw has the advantage of preventing the ingress of dust, dirt, liquids, or other foreign substances through the through-hole of the attachment and thus preventing damage to the attachment or its coating. It is possible to use a multitude of bolted connections, thereby ensuring a uniform load distribution, increased stability, and improved reliability of the connection. The force-fit connection in at least one primary area, particularly through the at least one bolted connection, allows for particularly effective absorption of tensile forces acting on the system.This advantageously prevents a peeling movement of the attachment component connected to the platform component along the contact surface in at least one first area, which could be caused by the action of an external tensile force. The force-fit connection thus has the advantage that a secure connection between the platform component and the attachment component can be ensured, particularly under tensile load.

[0013] The material-bonded connection, in particular the adhesive bond, between the attachment component and the platform component is formed in the cavity created by the at least partial arrangement of the attachment component over the stepped surface of the platform component between the attachment component and the platform component. To form the material-bonded connection in the at least one second region of the system, adhesive is preferably applied to the stepped surface, in particular the adhesive layer, of the platform component before the components are joined. Alternatively or additionally, the adhesive can also be applied to the attachment component before joining. The adhesive is preferably applied selectively and does not necessarily have to cover the entire stepped surface, in particular the adhesive layer, of the platform component and / or not necessarily the entire surface of the at least one second region of the attachment component.Preferably, the adhesive is applied continuously, particularly as an uninterrupted adhesive bead, and especially as a closed ring, to the platform component and / or the attachment component. This has the advantage that the ingress of dust, dirt, liquids, or other foreign substances into the cavity is at least partially or completely prevented. The surface to which the adhesive is applied can be roughened mechanically, chemically, or otherwise before application to increase the adhesive's adhesion and thus improve the reliability of the bond. It is also possible that, after the components have been joined in at least a first area, the adhesive is introduced into the cavity formed between the attachment component and the platform component in at least a second area by means of the force-fit connection.The material-bonded connection using adhesive has the advantage of being applicable in a wide variety of applications and for joining materials with different mechanical or thermal properties. The physical properties of the adhesive enable a permanent bond between the components. This material-bonded connection, particularly through the adhesive bond, allows for the effective absorption of shear forces acting on the system. These forces are distributed across the surface of the adhesive bond, thus ensuring a secure connection between the platform component and the attachment component under shear stress.

[0014] Ideally, the system features numerous screw connections, and the adhesive is applied to the stepped surface, particularly the bonding plane, of the platform component and / or the attachment in at least one other area before the components are joined. This allows only some of the screw connections to be made initially after the attachment is positioned on the platform component, ensuring the positioning and initial fixation of the components. After a defined waiting period while the adhesive cures, or alternatively without delay, the remaining screw connections are made to permanently secure the connection between the platform component and the attachment. This process enables precise alignment of the components during adhesive curing and, through the subsequent screw connections, ensures an optimized distribution of mechanical stresses within the joint.

[0015] The system has the advantage that the combination of material-bonded and force-fit connections results in increased strength, stability, and safety. The combination of material-bonded and force-fit connections in the system is particularly advantageous because, in at least one area, especially with the at least one screw connection, tensile forces acting on the system can be absorbed particularly well, thus preventing peeling due to tensile stress. Meanwhile, in at least one area, especially the at least one adhesive bond, the material-bonded connection can absorb shear stress acting on the system particularly well by distributing the load over a larger area compared to the force-fit connection, especially the area of ​​the at least one adhesive bond.The system further improves the reliability of the connection between the platform component and the attachment component by spacing the adhesive bond within the cavity from the screw connection, thus preventing any negative interaction between the two joining methods. The use of adhesive also reduces the number of required screw connections, resulting in weight savings, simplified design, and faster assembly without compromising the stability and load-bearing capacity of the connection.

[0016] The platform component can preferably be a component manufactured by casting, extrusion, and / or machining. Advantageously, the platform component is, for example, an extruded profile or a cast component, preferably made of aluminum or an alloy, such as a TL119 alloy. A platform component made of an extruded profile and / or a cast component has the particular advantage that a complex welded assembly consisting of many sheet metal parts can be replaced by a few cast and / or extruded components, which simplifies the manufacturing of the system and allows for greater automation. This thus enables a high degree of functional and component integration.A system according to the invention with a platform component manufactured by casting, extrusion, and / or machining further offers the advantage of enabling the production of specific spatial geometries of the components and the system, in particular the spatial separation of the force-fit connection in at least a first region and the material-fit connection in at least a second region, which would be difficult to achieve with other methods. Advantageously, this results in a high degree of freedom in the design of the system. A platform component made of an aluminum extrusion profile and / or an aluminum casting has the advantage of allowing for easy subsequent machining by drilling, cutting, welding, or machining. Furthermore, an aluminum platform component does not require additional painting, thus saving additional process steps.The surface of the platform component can be pretreated to ensure a reliable, material-bonded connection. For example, the surface of the platform component can be pretreated with a laser beam surface treatment.

[0017] The add-on component is preferably a side panel of a motor vehicle. The add-on component can be, for example, a sheet metal part, ideally a hot-formed sheet metal part, a cast component, or a plastic part. It is also possible for the add-on component to have a coating, such as cathodic dip coating (e-coating). Coating the add-on component with e-coating has the advantage that the surface of the add-on component is both solvent- and corrosion-resistant, as well as insensitive to acids and alkalis. Furthermore, the e-coating of the add-on component can interact with the adhesive, for example, through a chemical reaction, thereby forming an improved or strengthened adhesive bond. The add-on component can also have additional seals, for example, a welt seal, preferably on the end face, or an edge seal, preferably on the end face.

[0018] According to a preferred further development of the invention, a system may be provided in which the adhesive is a structural adhesive, in particular a two-component adhesive, and is preferably designed as a sealing adhesive for sealing the attachment part and the platform component.

[0019] The adhesive is preferably a structural adhesive specifically designed to ensure high mechanical strength and the effective transfer of loads, particularly tensile, compressive, and shear forces, within such a system. The structural adhesive contributes significantly to the structural integrity of the overall system by distributing stresses evenly across the bonding surface and minimizing material fatigue and failure under dynamic loads.

[0020] Two-component adhesives, such as epoxy resins or polyurethanes, are particularly suitable for this purpose, as they offer high mechanical strength as well as excellent chemical and thermal resistance, thus ensuring a reliable and durable bond even under demanding conditions. Furthermore, they enable

[0021] Two-component adhesives allow for precise adjustment of curing time and conditions, enabling flexible processing tailored to specific requirements. When using a plastic component, an acrylate adhesive can be used as a...

[0022] Structural adhesives are used. In this application, the term "structural adhesive" refers to an adhesive characterized by high strength and high stiffness.

[0023] Furthermore, the adhesive is preferably designed as a sealant. Due to the structural spatial separation of the screw connection in at least a first area and the bonded connection in at least a second area, the adhesive can preferably be applied to the platform component as an uninterrupted, continuous adhesive bead, particularly preferably as a closed ring, which is not interrupted by the screw connection. Thus, the bonded connection of such a system is not interrupted by the frictional connection. This has the advantage that the bonded connection or the adhesive connection can simultaneously perform a sealing function, thereby eliminating the need for additional sealing measures. This saves on additional sealing process steps and keeps the system costs low.Furthermore, this results in large degrees of freedom in the design of the system, enabling a combination of structural and sealing adhesives.

[0024] In a particularly preferred embodiment of the invention, the system may be provided in such a way that the stepped surface is offset from the contact surface by 0.2 - 0.6 mm, preferably

[0025] is arranged offset by 0.3 - 0.5 mm, particularly preferably by 0.4 mm.

[0026] In order for an adhesive to create a structurally bonded connection between the platform component and the attachment component, a cavity with a distance from the stepped surface to the attachment component in the range of 0.2 - 0.6 mm is preferably used.

[0027] A cavity width of 0.3–0.5 mm, particularly preferably 0.4 mm, is provided. A cavity that is too narrow (less than 0.2 mm) could lead to uneven adhesive distribution and stress concentrations, which could compromise structural integrity. A cavity that is too wide (over 0.6 mm) could cause the adhesive to yield under load, as many structural adhesives exhibit reduced strength in thicker layers. Furthermore, a cavity that is too wide (over 0.6 mm) could fail under load due to internal material weaknesses (e.g., cracks or porosity) in the adhesive bond. The specific design of this system has the advantage that two-component adhesives, such as epoxy resins, cure particularly effectively within this distance range (0.2–0.6 mm). Furthermore, many structural adhesives, such as epoxy resins or polyurethanes, develop their maximum shear and tensile strength in this range (0.2 - 0.6 mm), as the thickness is ideal for the internal cohesion of the material.This ensures a reliable connection method between the attachment component and the platform component.

[0028] According to a preferred embodiment of the invention, a system may further provide that the volume of the cavity is larger than the volume of the adhesive introduced into the cavity.

[0029] In other words, the width of the cavity can be greater than the adhesive layer width of the adhesive applied to the cavity. Preferably, the adhesive layer width is greater or

[0030] The cavity width can be greater than or equal to 10 mm. Furthermore, the cavity width can be greater than or equal to 20 mm. This embodiment of the system has the advantage that at least one reservoir or buffer zone is formed within the cavity. This ensures that any excess adhesive can be displaced in a controlled manner into a designated area, preferably into the reservoir, when the components are joined. This also effectively prevents the adhesive from entering the contact surface, screw plane, or the screw connection of the friction-fit joint. A negative impact of the adhesive on the screw connection is thus avoided. Furthermore, an adhesive layer width of greater than or equal to 10 mm ensures that the bonding surface is large enough to form a secure and reliable adhesive bond.

[0031] Particularly preferred is that the cavity is designed as an open cavity, with the adhesive being applied up to or beyond the opening of the cavity.

[0032] The open cavity has at least one opening. The open cavity can preferably be an open gap. The adhesive can preferably be applied to the stepped surface of the platform component in such a way that a reservoir sealed by the adhesive is formed in the open cavity.

[0033] Because the adhesive is applied up to or beyond the opening of the open cavity, no dust, dirt, liquid, or other foreign matter can enter the cavity through the opening. Furthermore, this design has the advantage that no standing moisture accumulates in the open cavity due to capillary action. This ensures reliable electrochemical separation when using, for example, steel and aluminum components, thus preventing corrosion caused by moisture. Additionally, the open cavity design ensures a reliable release of adhesive during the assembly of the components. The formation of a sealed reservoir also prevents adhesive from the bonded joint from entering the area of ​​the screw connection or the screw plane.This prevents contamination of the system and avoids any influence on the clamping force of the screw connection due to uncontrolled adhesive leakage.

[0034] According to the invention, it is further preferred in a system that the attachment component extends beyond the opening of the cavity.

[0035] Preferably, the attachment component extends 5 mm or more beyond the cavity opening. This ensures a reliable seal and precise positioning of the adhesive dispensed during assembly. This eliminates system contamination and the need for cleaning the system or tooling. Furthermore, the extension of the attachment component beyond the opening creates a greater distance between the platform component and the attachment component than within the cavity itself. This improves ventilation of the cavity opening and ensures electrochemical isolation. When using materials such as steel and aluminum components, this prevents moisture-induced corrosion.

[0036] According to a preferred embodiment of the invention, an undercut, in particular a chamfered, beveled surface, can be provided at the end of the stepped surface in a system.

[0037] This ensures a reliable adhesive release process during component assembly. Contamination of the system and any necessary cleaning steps for the system or tooling used in its manufacture are thus avoided. Furthermore, the clamping force of the screw connection is not affected by uncontrolled adhesive release. Additionally, the undercut in this area creates a greater distance between the platform component and the attachment component than within the cavity, resulting in better ventilation of the cavity opening and ensuring electrochemical separation of the components. This prevents corrosion due to moisture when using, for example, steel and aluminum components.In another preferred embodiment, the cavity of a system can be designed as a closed cavity, with the attachment component arranged completely over the stepped surface.

[0038] The stepped surface can be designed as a groove, with the attached component positioned entirely over the groove, so that the system forms a closed cavity in at least one other area. This closed cavity protects the adhesive bond from external influences such as the ingress of dust, dirt, liquids, or other foreign substances, significantly increasing the reliability of the adhesive bond.

[0039] Furthermore, in a system according to the invention, an edge seal, in particular a seam seal, can be provided on an end face of the attachment component and the platform component.

[0040] Edge sealing offers the advantage of protecting the cavity, screw plane, and / or contact surface against the ingress of dust, dirt, liquids, or other foreign substances, thus increasing the durability and function of the adhesive bond and the system. Furthermore, sealing the edge significantly reduces the risk of corrosion or oxidation at the edges, particularly in the case of metal components.

[0041] In a system according to the invention, the platform component can have at least one

[0042] third area in which the platform component has a further stepped, preferably parallel, surface to the mounting surface, wherein the attachment component is arranged at least partially above the further stepped surface, spaced apart from it, to form a further cavity between the attachment component and the platform component.

[0043] The contact surface in the at least one first region preferably forms a screw boss between the two stepped surfaces in the at least one second region and the at least one third region. The height of the screw boss and the offset of the stepped surfaces of the at least one first region and the at least one third region can preferably be variably manufactured by machining. This allows the screw boss to be easily and individually adapted to the requirements of the system. Furthermore, the screw boss provides stable and precise positioning for screws, thus ensuring a reliable connection between the components. The further cavity can be designed as an open cavity or as a closed cavity. An adhesive, in particular a structural adhesive, and especially preferably a two-component adhesive, can be arranged in the further cavity.Preferably, the adhesive acts as a sealing adhesive for sealing the attachment part and the platform component, preferably for sealing the cavity between the attachment part and the platform component.

[0044] Furthermore, it is possible that the stepped surface in the at least one third area is directly adjacent to the stepped surface in the at least one second area, such that a further stepped surface is formed in the at least one third area. In other words, the platform component has two steps, like a kind of staircase. For example, the stepped surface in the at least one second area can have a structural adhesive, and the stepped surface in the at least one third area can have a sealing adhesive.

[0045] According to a preferred embodiment of the invention, in a system a sealing adhesive can be arranged in the further cavity in such a way that it connects the attachment component and the platform component to each other in a materially bonded and sealing manner.

[0046] In particular, in a further cavity between the attachment component and the platform component, where the stepped surface is offset by, for example, more than 0.6 mm, a sealing adhesive can be arranged to seal the attachment component and the platform component, especially the cavity. The term "sealing adhesive" as used in this application can be understood to mean an adhesive characterized by a permanent sealing effect. Furthermore, sealing adhesives are flexible, reliably absorb movements, vibrations, and material expansions, and adapt to the components, for example, through their extensibility, so that manufacturing tolerances can also be compensated for. Moreover, sealing adhesives are more resistant to aging than structural adhesives and lose less adhesion over time, especially when in contact with other different media.Sealing adhesives are easy to apply and do not require complex pretreatments or special mixing systems, such as two-component adhesives. Furthermore, sealing adhesives cure faster than structural adhesives or are immediately functional, thus reducing processing times. The sealing adhesive can be, for example, a polyvinyl chloride or polyurethane adhesive.

[0047] According to a second aspect of the invention, the problem is solved by a motor vehicle. According to the invention, the vehicle comprises at least one system described above. Thus, a motor vehicle according to the invention offers the same advantages as those already described in detail with regard to a system according to the invention. In principle, a motor vehicle can be any type of motor-driven vehicle. The motor vehicle can be designed as a land, water, or air vehicle.

[0048] In particular, the motor vehicle can be a car or a truck. Furthermore, the motor vehicle can have an internal combustion engine and / or an electric motor. It is also possible for the motor vehicle to be powered exclusively by electricity.

[0049] According to a third aspect of the invention, the problem is solved by a method for joining at least one of the systems described above. The method steps comprise providing the platform component, applying the adhesive to the stepped surface of the platform component, providing the attachment component, positioning the attachment component on the contact surface of the platform component such that the attachment component is arranged at least partially above the stepped surface, spaced apart from it, on the adhesive to form a material-bonded connection between the attachment component and the platform component, and connecting the platform component and the attachment component in the at least one first region with at least one screw connection.

[0050] Thus, a method according to the invention offers the same advantages as those already described in detail with regard to a system according to the invention and a motor vehicle according to the invention.

[0051] A system according to the invention, comprising a platform component and an attachment component of a motor vehicle, as well as a motor vehicle according to the invention with a system according to the invention, are explained in more detail below with reference to the drawings. The drawings schematically show:

[0052] Figure 1 shows a section view of a system according to a preferred embodiment of the invention.

[0053] Figure 2 shows a section view of a system according to a further preferred embodiment of the invention.

[0054] Figure 3 shows a section view of a system according to a further preferred embodiment of the invention.

[0055] Figure 4 shows a section of a system according to a further preferred embodiment of the invention in a sectional view; Figure 5 shows a section of a system according to a further preferred embodiment of the invention in a sectional view.

[0056] Figure 6 shows a section view of a system according to a further preferred embodiment of the invention and

[0057] Figure 7 shows a side view of a preferred embodiment of a motor vehicle according to the invention.

[0058] Elements with the same function and mode of operation are each provided with the same reference numerals in Figs. 1 to 7.

[0059] Figures 1 to 6 each schematically depict a section of a system 100 consisting of a platform component 10 and an attachment component 11 of a motor vehicle 25 according to a preferred embodiment of the invention. The embodiments have a common contact surface 14 in at least one first region 12, where the platform component 10 and the attachment component 11 lie against each other without a gap, and a stepped, preferably parallel, surface 15 in a second region 13. Furthermore, in the embodiments, the platform component 10 is connected to the attachment component 11 by a screw connection 26 in a first region 12 and by an adhesive connection 27 using the adhesive 17 in a second region.The adhesive is arranged in a cavity 16 between the platform component 10 and the attachment component 11, the cavity 16 being formed by the at least partial arrangement of the attachment component 11 above the stepped surface 15, spaced apart from it. In the embodiments shown in Figures 1 to 6, the attachment component 11 has a through-hole for the screw connection 26. A system 100 according to the invention can further comprise an additional seal, for example a bead seal, as well as plastic cladding.

[0060] Figures 1, 2, 4, and 5 show an embodiment of a system 100 with a cavity 16 as an open cavity, for example, as a gap, wherein the adhesive 17 is applied up to or beyond the opening 18 of the cavity 16. The adhesive 17 can preferably be applied to the stepped surface 15 in such a way that a reservoir sealed by the adhesive is formed in the cavity 16. The open cavity 16 and the targeted positioning of the adhesive 17 ensure that, when the attachment component 11 is positioned on the platform component 10, the adhesive 17, which has been applied to the stepped surface 15, in particular the adhesive layer, can escape through the opening 18 of the cavity 16, so that no standing moisture can form in the cavity 16 and no adhesive 17 enters the screw plane or the thread or through-hole of the screw connection 26.

[0061] Fig. 1 shows an embodiment of a system 100 in which the system 100 has an undercut 19, in particular a chamfered, beveled surface, at the end of the stepped surface 15. This creates an enlarged opening at the cavity 16, which enables controlled and reliable adhesive dispensing. The platform component 10 is a hollow component, in particular an aluminum extrusion profile, and has a through-hole for the screw connection 26.

[0062] Fig. 2 shows an embodiment of a system 100 in which the attachment component 11 extends beyond the opening 18 of the cavity 16, preferably by 5 mm or more. The platform component 10 is a hollow component, in particular an aluminum extrusion profile, and has a through-hole for the screw connection 26.

[0063] Fig. 4 shows an embodiment of a system 100, wherein the platform component 10 has a third area 21 in which the platform component 10 has a further stepped, preferably parallel, surface 22, wherein the attachment component 11 is arranged at least partially above the further stepped surface 22, spaced apart from it, to form a further cavity 23 between the attachment component 11 and the platform component 10. The further stepped surface 22 is arranged such that the contact surface 14 forms a screw boss between the two stepped surfaces 15, 22. The platform component 10 is a cast component, in particular an aluminum cast component, and has a blind hole for the screw connection 26.

[0064] Fig. 6 shows an embodiment of a system 100, wherein the platform component 10

[0065] The platform component 10 has two third areas 21, in which it has a further stepped, preferably parallel, surface 22, the latter being stepped relative to the mounting surface 14. The attachment component 11 is arranged at least partially above this further stepped surface 22, spaced apart from it, to form a further cavity 23 between the attachment component 11 and the platform component 10. In this third area, one of the stepped surfaces 22 is directly adjacent to and offset from the stepped surface 15, forming a kind of staircase with two steps. This further cavity 23, adjacent to the cavity 16, has a sealing adhesive. The other further stepped surface 22 is arranged such that the mounting surface 14 forms a screw boss between the two stepped surfaces 15 and 22. The platform component 10 is a cast component, in particular an aluminum cast component, and has a blind hole for the screw connection 26. Fig. 3 and Fig.Figures 5 each show an embodiment of a system 100 with a cavity 16 as a closed cavity 16, wherein the adhesive 17 is arranged centrally on the stepped surface 15. The adhesive 17 can preferably be applied to the stepped surface 15 such that two reservoirs are formed in one cavity 16, which are at least partially separated from each other by the adhesive. The targeted positioning of the adhesive 17 ensures that when the attachment component 11 is positioned on the platform component 10, the adhesive 17, which has been applied to the stepped surface 15, in particular the adhesive plane, does not enter the screw plane or the thread or through-hole of the screw connection 26.

[0066] The embodiment of a system 100 in Fig. 3 has an edge seal 20, in particular a seam seal, on an end face of the attachment component 11 and the platform component 10. The platform component 10 is a hollow component, in particular an aluminum extrusion profile, and has a through-hole for the screw connection 26.

[0067] The embodiment of a system 100 in Fig. 5 has a further cavity 23 in a third area 21 as an open cavity in which a sealing adhesive 24 is applied up to or beyond the opening of the cavity 23 and bonds the attachment component 11 and the platform component 10 together in a material-bonded and sealing manner. The sealing adhesive 24 can preferably be applied to the stepped surface 22 such that a reservoir enclosed by the sealing adhesive 24 is formed in the cavity 23. The platform component 10 is a cast component, in particular an aluminum cast component, and has a blind hole for the screw connection 26.

[0068] Fig. 7 schematically shows a preferred embodiment of a motor vehicle 25 according to the invention in a side view. The motor vehicle 25 has a system 100 according to the invention. List of reference numerals

[0069] Platform component

[0070] Add-on component

[0071] first area

[0072] second area

[0073] Site area

[0074] stepped surface

[0075] cavity

[0076] adhesive

[0077] opening

[0078] Undercut

[0079] Edge seal

[0080] third area

[0081] further terraced area

[0082] further cavity

[0083] Sealing adhesive

[0084] motor vehicle

[0085] screw connection

[0086] adhesive bond

[0087] system

Claims

Patent claims 1. System (100) consisting of a platform component (10) and an attachment component (11) of a motor vehicle (25), characterized by that the platform component (10) and the attachment component (11) are connected to each other in at least a first area (12) by means of a force-fit connection and in at least a second area (13) by means of a material-fit connection, - wherein in at least one first area (12) the platform component (10) and the attachment component (11) lie flush against each other on a common mounting surface (14) without a gap, - wherein the platform component (10) and the attachment component (11) are connected in the at least one first region (12) by at least one screw connection (26), - wherein in the at least one second region (13) the platform component (10) has a stepped, preferably parallel, surface (15) relative to the contact surface (14), - wherein the attachment component (11) is arranged at least partially above the stepped surface (15), spaced apart from it, to form a cavity (16) between the attachment component (11) and the platform component (10), - wherein an adhesive (17) is arranged in the cavity (16) such that it connects the attachment component (11) and the platform component (10) to each other by means of an adhesive bond (27), - wherein at least one screw connection (26) is spaced apart from the cavity (16).

2. System (100) according to claim 1, characterized by that the adhesive (17) is a structural adhesive, in particular a Two-component adhesive, is and preferably designed as a sealing adhesive for sealing the attachment part (11) and the platform part (10).

3. System (100) according to claim 2, characterized by that the stepped surface (15) is offset from the contact surface (14) by 0.2 - 0.6 mm, preferably by 0.3 - 0.5 mm, particularly preferably by 0.4 mm.

4. System (100) according to one of the preceding claims, characterized by that the volume of the cavity (16) is larger than the volume of the adhesive (17) introduced into the cavity (16).

5. System (100) according to any one of the preceding claims, characterized by that the cavity (16) is designed as an open cavity, with the adhesive (17) being applied up to or beyond the opening (18) of the cavity.

6. System (100) according to claim 4, characterized by that the attachment component (11) extends beyond the opening (18) of the cavity (16).

7. System (100) according to any one of the preceding claims, characterized by that at the end of the stepped surface (15) an undercut (19), in particular a chamfered, beveled surface, is provided.

8. System (100) according to claims 1 to 3, characterized by that the cavity (16) is designed as a closed cavity, wherein the attachment component (11) is arranged completely over the stepped surface (15).

9. System (100) according to claim 7, characterized by that an edge seal (20), in particular a seam seal, is provided on an end face of the attachment component (11) and the platform component (10).

10. System (100) according to any one of the preceding claims, characterized by that the platform component (10) has at least a third area (21) in which the platform component (10) has a further stepped, preferably parallel, surface (22) to the mounting surface (14), wherein the attachment component (11) is arranged at least partially above the further stepped surface (22), spaced apart from it, to form a further cavity (23) between the attachment component (11) and the platform component (10).

11. System (100) according to claim 9 or 10, characterized by that in the further cavity (23) a sealing adhesive (24) is arranged in such a way that it connects the attachment component (11) and the platform component (10) together in a materially bonded and sealing manner.

12. Motor vehicle (25), characterized by that the vehicle (25) comprises at least one system (100) according to one of the preceding claims.

13. Method for joining a system (100) according to any one of the preceding claims 1 to 11, comprising the following method steps: Provision of the platform component (10), - Applying the adhesive (17) to the stepped surface (15) of the platform component (10), Providing the attachment component (11), Positioning the attachment component (11) on the mounting surface (14) of the platform component (10) such that the attachment component (11) is arranged at least partially above the stepped surface (15), spaced apart from it, on the adhesive (17) to form a material-bonded connection between the attachment component (11) and the platform component (10), and Connecting the platform component (10) and the attachment component (11) in at least one first area (12) with at least one screw connection (26).

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