Air guide device for a motor vehicle, arrangement and method

Abstract

The invention relates to an air guide device (10) for a motor vehicle, comprising a first component (20) which has at least one air guide surface (24) for guiding air flowing towards the air guide device (10) when the motor vehicle is in motion, and a second component (22) formed separately from the first component (20) which is held on the first component (20), wherein one of the components (20) has an opening (38) and the other of the components (22) has a retaining element (40) which extends at least partially through the opening (38) and which has a coupling area (46) formed by at least local melting of the retaining element (40), via which the retaining element (40) is positively connected to the component (20) having the opening (38).

Description

[0001] The invention relates to an air guide device for a motor vehicle according to the preamble of claim 1. Furthermore, the invention relates to an arrangement of such an air guide device on the outside of a motor vehicle according to claim 9, and to a method for manufacturing an air guide device for a motor vehicle according to the preamble of claim 10.

[0002] DE 10 2022 102 401 A1 discloses a rear spoiler with a flat base body, wherein a spoiler edge element is arranged on the base body, which forms the spoiler edge on the base body, wherein the spoiler edge element is attached to the base body both materially and form-fittingly.

[0003] Furthermore, a rear spoiler for a vehicle is known from DE 10 2016 214 834 A1, which is rigidly connected to a vehicle body or a tailgate or a rear door of the vehicle, wherein the rear spoiler has a spoiler base body to which two or more spoiler lips, each forming a wind separation edge, are assigned or assignable, from which a choice can be made or which are interchangeable with each other.

[0004] Furthermore, DE 10 2017 007 530 A1 discloses a composite component for a vehicle, comprising an outer shell and a support body held in the outer shell in a form-fitting manner, wherein the support body comprises a foam.

[0005] The object of the present invention is to provide an air guide device for a motor vehicle, an arrangement of an air guide device on the outside of a motor vehicle, and a method for manufacturing an air guide device for a motor vehicle, such that components of the air guide device can be attached to each other in a particularly secure manner.

[0006] This problem is solved according to the invention by an air guide device for a motor vehicle with the features of claim 1, by an arrangement of an air guide device on the outside of a motor vehicle with the features of claim 7, and by a method for manufacturing an air guide device for a motor vehicle with the features of claim 10. Advantageous embodiments with expedient further developments of the invention are specified in the remaining claims.

[0007] A first aspect of the invention relates to an air guide device for a motor vehicle, which is designed, for example, as a car, and in particular as a passenger car. Preferably, the motor vehicle, especially in its fully manufactured state, includes the air guide device. Preferably, the air guide device has at least one holding device by which the air guide device is held, or is held, on a component of the motor vehicle that is designed separately from the air guide device, particularly on an outer surface of the motor vehicle. The component is, for example, a body component or a wing element, in particular a tailgate of the motor vehicle. In the present context, the term "body component" refers to a component of a body of the motor vehicle, in particular a self-supporting body.

[0008] The air guide device comprises at least one first component, which is designed, for example, as the base body of the air guide device. The first component can also be referred to as the first air guide device part. The first component comprises at least one air guide surface for directing, in particular, the air flowing towards the air guide device, especially the air guide surface, during the movement of the motor vehicle. This means that, during the movement of the motor vehicle, the air, in particular referred to as the airflow, which flows towards or around the air guide device, especially the air guide surface, can be directed by means of the air guide surface. In other words, during the movement of the motor vehicle, the air guide surface is subjected to the air flowing towards or around the motor vehicle.The air guide surface is therefore an outer surface of the air guide device that points outwards, particularly in relation to the motor vehicle.

[0009] Furthermore, the air guide device comprises at least one second component, designed separately from the first component, which is held, for example, directly, to the first component. In other words, the components are attached to one another, particularly directly. This means that the first component is attached to the second component and / or that the second component is attached to the first component. The second component can also be referred to as the second air guide device part. The air guide device is thus multi-part, in particular at least two-part. The air guide device is therefore an assembly, which can also be described as a component assembly. This component assembly comprises at least the first and the second component. The second component can have at least one second air guide surface designed to direct the air flowing towards the air guide device when the motor vehicle is in motion.However, it is also possible that the second component does not have an air guide surface, i.e., it is free of the second air guide surface or free of all air guide surfaces.

[0010] In order to securely fasten the components of the air guide device together, particularly in a particularly cost-effective manner, the invention provides that one of the components, for example the first component, has at least one opening, and the other component, for example the second component, has at least one retaining element that extends at least partially through the opening. In other words, the retaining element is arranged or received at least partially within the opening. The opening can also be referred to as a through-opening. The retaining element has at least one coupling area formed by at least local melting of the retaining element, in particular of a material of the retaining element, via which the retaining element is positively connected, in particular directly, to the component having the opening, in particular the first component.This means that the retaining element is connected, in particular directly, to a wall of the component containing the opening that defines or forms the opening via the coupling area. In other words, the retaining element has a receiving area and a coupling area that adjoins the receiving area, in particular at least indirectly or directly, wherein the receiving area is arranged or received in the opening, in particular by passing the retaining element through the opening, and the coupling area is formed or is formed by at least locally melting the retaining element after the receiving area has been arranged or received in the opening, whereby the retaining element is positively connected or is connected to the component containing the opening via the coupling area, in particular as a result of the melting.The intake area can also be referred to as the penetration area. The melting process can also be referred to as smelting.

[0011] In this context, "melting" refers to the process of subjecting the retaining element to heat, at least locally, for example, by means of a welding device. This results in a local change in the retaining element's shape, particularly due to the melting of a material within the element. This change in shape forms the coupling zone. Specifically, this means that before the aforementioned change in shape, the coupling zone is not present, and the retaining element is therefore free of it. Consequently, the retaining element is not positively connected to the component containing the opening. After the change in shape, or as a result of this change, the retaining element develops the coupling zone, and thus the retaining element is positively connected to the component containing the opening via this coupling zone.The coupling area can therefore be understood in particular as an attachment area which is designed for, in particular, direct contact with the wall.

[0012] The invention is based in particular on the following findings and considerations: In a conventional air guide device, the joining of two components, for example, a spoiler to a substructure or trunk lid, can be achieved in various ways. The joining, or the spoiler in question, can be attached, for example, using adhesive tape and a positive-locking connection formed by a snap-fit ​​mechanism. However, such a joining may not be ideal in terms of its permanent attachment, which could lead to the components unintentionally coming loose, for example, during operation of the vehicle.

[0013] In contrast, the aforementioned disadvantages can be avoided particularly reliably by means of the air guide device according to the invention. The air guide device according to the invention provides a locking mechanism to prevent loss by means of a positive-locking connection between the two components. This positive lock can be created by a geometry formed by melting the retaining element, for example, into one of the components to be attached. This allows the components to be secured particularly well. This positive lock can, for example, provide additional protection against loss of the components. This means that the components are connected to each other, for example, via a separate connection, and the positive lock achieved by means of the retaining element or the coupling area is an additional connection between the components.This allows the components to be connected particularly securely, preventing, for example, the loss of the component containing the retaining element (e.g., the second component) during vehicle operation. A positive locking connection, particularly a separate one, can thus be achieved through the retaining element or the coupling area. This positive locking can be achieved with minimal effort by melting the retaining element. This significantly reduces the manufacturing costs of the air guide device and, consequently, the manufacturing costs of the vehicle. The air guide device is, for example, designed as a spoiler. This provides a way to prevent the spoiler from falling off.

[0014] In a further embodiment, the coupling area is provided to have at least one contact area over which the retaining element, particularly for forming or effecting the positive locking, can be supported or supported in the axial direction of the opening against the wall of the component containing the opening, for example, the first component, which defines the opening. This means that the component containing the opening and the retaining element are in a support position, particularly directly, via the coupling area in the axial direction of the opening. In other words, the retaining element is secured by the contact area against any movement of the retaining element relative to the component containing the opening in the axial direction of the opening, particularly any unintended movement. This allows the components to be attached to each other with particular security.

[0015] In a further embodiment, the retaining element is connected via a connection area to a base part of the component containing the retaining element, for example, the second component, particularly directly. Thus, one of the components, for example, the second component, comprises the retaining element and the base part, with the base part and the retaining element being connected to each other via the connection area. The retaining element and the base part can be formed integrally. This means that the retaining element can be integrally formed with the base part. The retaining element projects obliquely or perpendicularly from the base part. This means that the retaining element connects to the base part via the connection area, projecting obliquely or perpendicularly, for example, directly. In other words, the base part and the retaining element extend obliquely or perpendicularly to each other.The connecting area is located on a first side of the opening, particularly with respect to the axial direction of the opening, and the coupling area is located on a second side of the opening, different from the first side, particularly with respect to the axial direction of the opening. In other words, the coupling area and the connecting area are located on different sides of the opening, particularly with respect to the axial direction of the opening. The retaining element, particularly the receiving area of ​​the retaining element, is thus designed, for example, as a web, which can also be referred to as a tab or a blade. Alternatively or additionally, the retaining element, particularly the receiving area, is designed, for example, as a longitudinal rivet. The positive-locking connection can thus be realized in a particularly cost-effective manner.In particular, the retaining element can be guided through the opening with minimal effort due to its protrusion from the base part, i.e., it can be threaded into the opening, thus keeping assembly effort to a minimum.

[0016] In a further embodiment, the coupling area is designed to have a cross-section shaped like a circular segment. This means that the cross-section of the coupling area is shaped as a segment of a circle, particularly an imaginary one. The coupling area is thus shaped, for example, as a mushroom head or a longitudinal rivet boss. This allows for a particularly secure positive connection between the components in a very simple manner.

[0017] For example, the second component is designed as a cladding part, in particular as a decorative panel. The cladding part has, for example, at least one separation edge, which is why the cladding part can also be referred to as a separation edge element. The separation edge can also be referred to as a flow separation edge. Thus, the cladding part can be attached to the first component particularly securely.

[0018] In a further embodiment, the air guide device is designed as a roof spoiler, specifically a roof edge spoiler. In other words, the air guide device, particularly in its installed position in the vehicle, can be attached to or is attached to an upper surface pointing upwards in the vehicle's vertical direction. The roof spoiler can thus be designed to be particularly secure against loss. For example, the air guide device is designed for integration into the vehicle's tailgate. Thus, the air guide device is specifically integrated into the tailgate.

[0019] In a further embodiment, it is provided that the components are welded together, particularly in addition to the positive-locking connection, for example by means of plastic welding. This means that the separate connection can be a separate weld. The components can thus, for example, first be welded together, and then the retaining element can be locally melted to form the coupling area. The same welding equipment can be used for both the welding and the local melting, or the welding device used for welding can be extended to include a welding element specifically designed to melt the retaining element. This allows the manufacturing effort for the air guide device to be kept particularly low.Furthermore, welding allows for a particularly secure fastening of the components to one another. A sonotrode, which can be responsible for locally melting the holding element, can be integrated into a welding system, in particular into the welding unit.

[0020] In a further embodiment, the retaining element, in particular its receiving area, is movable relative to the component containing the opening (e.g., the first component) in a direction perpendicular to the axial direction of the opening, which can also be described as the direction of movement. In other words, the retaining element, and especially its receiving area, is movably mounted in the opening relative to the component containing the opening in the direction of movement. This allows the components to be moved relative to each other, for example, to compensate for tolerances. This significantly reduces the manufacturing effort required for the air guide device. Furthermore, the components can be aligned with exceptional precision relative to each other. This enables both precise alignment and particularly secure fastening.The direction of movement, particularly when the air guide device is installed, runs within or on the vehicle, at least essentially in the vehicle's vertical direction, which can also be referred to as the "z-direction". Therefore, there may be a possibility for further alignment in the vehicle's vertical direction (z-alignment) within the assembly.

[0021] Overall, it is evident that a locking mechanism can be achieved through the positive-locking connection of two parts in the form of the aforementioned components of the air guide device. This positive lock can be created by the mushroom-shaped head on the component being attached. The mushroom head can be formed by melting the retaining element, which may be designed, for example, as a plastic tab and / or plastic blade. This ensures that the welded decorative trim on the roof spoiler, which is additionally connected via a "mushroom head," is secured against loss during vehicle operation. Furthermore, the positive-locking interlocking can provide additional security for a series welding process.

[0022] A second aspect of the invention relates to an arrangement of at least one air guide device according to the first aspect of the invention on an outer surface, in particular on a roof or in the roof area, of a motor vehicle. Advantages and advantageous embodiments of the first aspect of the invention are to be regarded as advantages and advantageous embodiments of the second aspect of the invention and vice versa.

[0023] A third aspect of the invention relates to a method for manufacturing an air guide device comprising at least one first and at least one second component, particularly according to the first aspect of the invention, for a motor vehicle. Advantages and advantageous embodiments of the first and second aspects of the invention are to be regarded as advantages and advantageous embodiments of the third aspect of the invention, and vice versa. At least the first component comprises at least one air guide surface designed or configured to guide air flowing towards the air guide device when the motor vehicle is in motion.

[0024] In order to securely fasten the components together, at least the following steps are carried out in the process: - Providing the components, one of which has an opening and the other of which has a retaining element, and - in particular, at least partially passing the retaining element through the opening, whereby in particular at least one receiving area of ​​the retaining element is received in the opening, and - at least local melting of the retaining element which is at least partially passed through the opening, for example by means of a welding device, whereby, in particular by a change in shape of the retaining element caused by the melting, a coupling area is formed or shaped, via which the retaining element is or is connected, in particular directly, in a form-fitting manner to the component having the opening, in particular to connect the components to each other in a form-fitting manner.

[0025] Further advantages, features, and details of the invention will become apparent from the following description of a preferred embodiment and from the drawings. The features and combinations of features mentioned above in the description, as well as those mentioned below in the figure description and / or shown in the figures alone, can be used not only in the combinations specified, but also in other combinations or individually, without departing from the scope of the invention.

[0026] This shows: Fig. 1 a schematic and perspective partial view of an arrangement of an air guide device according to the invention on the outside of a motor vehicle; and Fig. 2 a schematic and perspective partial sectional view of an air guide device according to the invention in an incomplete state; and Fig. 3 a schematic and perspective partial view of an air guide device according to the invention, viewed from the inside in an incompletely manufactured state; and Fig. 4 a schematic partial sectional view of an air guide device according to the invention in an incomplete state; and Fig. 5 a schematic partial sectional view of an air guide device according to the invention; and Fig. 6 a schematic and perspective partial view of an air guidance device according to the invention.

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

[0028] Fig. Figure 1 shows a schematic and perspective partial view of an arrangement of an air guide device 10 on the outer surface 12 of a motor vehicle. The following is shown in Fig. Figure 1 shows a tailgate 14 of the motor vehicle. The tailgate 14 can also be referred to as a trunk lid or rear door. In this embodiment, the air guide device 10 is designed as a roof spoiler 16, which is integrated into the tailgate 14. The air guide device 10 is thus attached, for example, directly to a tailgate part 18 of the tailgate 14.

[0029] The air guide device 10 is designed in multiple parts. The air guide device 10 thus comprises at least a first component 20 and a second component 22, which is designed separately from the first component 20. The first and second components 20, 22 can therefore form a subassembly, in particular a joined subassembly, within the air guide device 10. The first component 20 can also be referred to as the first roof spoiler component, and the second component 22 can also be referred to as the second roof spoiler component. As in Fig. As can be seen in Figure 1, the second component 22 is located in the longitudinal direction of the vehicle, and in particular directly, adjacent to the first component 20. The second component 22 is therefore positioned further back in the longitudinal direction of the vehicle, at least in some areas, than the first component 20.

[0030] The first component 20 has at least one air guide surface 24 for directing the airflow towards the air guide device 10 when the motor vehicle is in motion. As in Fig. As can be seen in Figure 1, the air guide surface 24 is oriented upwards in the vehicle's vertical direction. The second component 22 is designed in this embodiment as a trim part 26, for example, as a decorative panel. The trim part 26 can be understood as an add-on component.

[0031] Fig. Figure 2 shows the air guide device 10 in a schematic partial sectional view, wherein in Fig. 2 The air guide device 10 is shown in an incomplete state. A section plane 28 for the sectional view according to Fig. 2 is in Fig. Figure 1 illustrates this. In this embodiment, the second component 22 has a second air guide surface 30, which is designed to direct the air flowing towards the air guide device 10 when the vehicle is in motion. In this case, the second air guide surface 30 adjoins the first air guide surface 24 to the rear in the longitudinal direction of the vehicle, in particular directly. This allows the air flowing towards or around the vehicle or the air guide device 10 to be directed, in a controlled manner, to the second air guide surface 30 in the longitudinal direction of the vehicle to the rear by means of the first air guide surface 24. For example, the second component 22 has a trailing edge 32 that, for instance, limits the second air guide surface 30 to the rear in the longitudinal direction of the vehicle.The air directed to the second air guide surface 30 can thus be guided, in a targeted manner, by means of the second air guide surface 30 to the separation edge 32, by means of which the air can be directed downwards, for example in the upward direction of the vehicle, in particular towards a rear window 34. As in . Fig. 1 and Fig. As can be seen in Figure 2, the second air guide surface 30 is oriented upwards in the vehicle's vertical direction.

[0032] In the Fig. In the embodiment shown in Figure 2, the air guide device 10 has a third component 36 that is formed separately from the components 20 and 22. In this case, the first component 22 is designed as an outer shell, and the third component 36 is, for example, designed as an inner shell. For example, the first and third components 20 and 36 are connected to each other, in particular by welding.

[0033] The second component 22 is held, in particular directly, to the first component 20. The components 20 and 22 are, for example, welded together, that is, joined by welding. Thus, the second component 22 can be attached to the third component 36 via the first component 20. The first and second components 20 and 22 are, for example, at least partially, in particular predominantly or completely, made of plastic. Therefore, the welding can be plastic welding.

[0034] To ensure particularly secure attachment of the components 20, 22 to one another, a positive-locking connection is formed between the first and second components 20, 22, in particular in addition to the welded joint. A method for manufacturing the air guide device 10, in particular a method for connecting the components 20, 22, is described below, wherein the positive-locking connection is formed in this method. For example, a first step of the method comprises providing the components 20, 22. One of the components 20, 22 has an opening 38, and the other of the components 20, 22 has a retaining element 40, in particular one corresponding to the opening 38. As in Fig. As shown in Figure 2, the first component 20 has the opening 38 and the second component 22 has the retaining element 40. Fig. Figure 3 shows the air guide device 10 in a schematic partial view from the inside, wherein in Fig. 3 the opening 38 and the retaining element 40 are particularly easy to see. In Fig. 3 The air guide device 10 is also in the incomplete state. The opening 38 is, in this case, particularly in its radial direction, limited or formed by a wall 42 of the first component 22.

[0035] A second step of the procedure can include passing the retaining element 40 through the opening 38. This means that the retaining element 40, in particular at least a receiving area 44 of the retaining element 40, is passed at least partially through the opening 38. Fig. 3. The retaining element 40 has already been passed through the opening 38, whereby at least the receiving area 44 of the retaining element 40 is received in the opening 38. As a result, at least the receiving area 44 of the retaining element 40, particularly in the radial direction of the opening 38, is covered by the wall 42. This is also evident in Fig. 4, in which the air guide device 10 is shown in a schematic partial sectional view.

[0036] A third step of the process can include at least locally melting the retaining element 40, which is at least partially guided through the opening 38, thereby forming a coupling area 46 through which the retaining element 40 is or will be positively connected to the first component 20. This means that after the retaining element 40 has been guided through the opening 38, that is, in particular after the receiving area 44 has been received in the opening 38, the retaining element 40 can be locally melted, at least partially, in particular by applying heat, resulting in a change in the shape of the retaining element 40, which forms the coupling area 46. The coupling area 46 is in Fig. Figure 5 illustrates the air guide device 10, particularly in its fully manufactured state, in a schematic partial sectional view. Thus, before at least local melting, the retaining element 40 has, for example, a first shape 48, and after at least local melting, i.e., after the shape change, the retaining element 40 has a second shape 50 that differs from the first shape 48. The respective shapes 48 and 50 can be understood as the respective geometries of the retaining element 40.

[0037] The coupling area 46 or the second form 50 is also in Fig. Figure 6 illustrates this, showing a schematic and perspective partial view of the air guide device 10. The air guide device 10 thus has the retaining element 40, which extends at least partially through the opening 38. This retaining element, particularly in the fully manufactured state of the air guide device 10, has the coupling area 46 formed by at least local melting of the retaining element 40. The retaining element 40 is positively connected to the first component 20 via this coupling area 46. This results in a positive connection between the first and second components 20, 22. This means that the aforementioned positive connection is achieved, or is achieved, by the coupling area 46.This creates a locking mechanism that prevents the detachment of the subassembly, joined for example by plastic welding, between the outer shell and the decorative trim of the roof spoiler 16 integrated into the tailgate 14 of the motor vehicle. The method can also include welding, which is preferably carried out before the formation of the positive-locking connection, i.e., before local melting.

[0038] As in Fig. As shown in Figure 5, the coupling area 46 in the exemplary embodiment has a contact area 52 over which the retaining element 40 is supported in the axial direction 54 of the opening 38, in particular directly, on the wall, i.e., on the first component 20. Furthermore, the retaining element 40 is, as shown for example in Fig. 2 and Fig. Figure 4 shows a connection area 56 to a base part 58 of the second component 22, for example, in one piece, with the retaining element 40 projecting obliquely or perpendicularly from the base part 58. The connection area 56 is arranged on a first side 60 of the opening 38, and the coupling area 46 is arranged on a second side 62 of the opening 38, which differs from the first side 60. This means that the connection area 56 and the coupling area 46 are arranged on opposite sides of the wall 42.

[0039] In this case, the connecting area 56 is arranged at one end on the retaining element 40, and the coupling area 46 is arranged at the other end of the retaining element 40. This means that the coupling area 46 is arranged, for example, at an end 64 of the retaining element 40 facing away from the base part 58, in particular the connecting area 56. Thus, to guide the retaining element 40 through the opening 38, the end 64 can be inserted into the opening 38. The retaining element 40 is guided through the opening 38 in such a way that the receiving area 44 is received in the opening 38 and the end 64 is located outside the opening 38, i.e., it has been led back out of the opening 38. The end 64 can be formed into the coupling area 46 by locally melting the retaining element 40.In this process, the cross-section 66 of the coupling area 46 is larger than the opening 38, whereas the corresponding cross-section of the end 64 is smaller than the opening 38 before melting. This allows the end 64 to initially pass through the opening 38. However, after melting, or rather after the coupling area 46 has formed, the cross-section 66 is too large, preventing the coupling area 46 from being guided back through the opening 38. This allows the aforementioned positive locking to occur.

[0040] The cross-section 66, for example, is shaped as a circular segment, i.e., mushroom-shaped. As in Fig. As can be seen in Figure 6, the coupling area 46 is shaped as a longitudinal rivet boss. The coupling area 46 can therefore also be referred to as a rivet head.

[0041] Overall, it is evident that the assembly of two components, in the form of the first and second components 20 and 22, can be achieved by welding and additionally by creating a positive-locking connection through the melting (or erosion) of a web integrated into the second component 22, forming the retaining element 40. This means that the positive lock can be created by melting the retaining element 40, which may be a plastic web, into a mushroom head or longitudinal rivet, for example, only after the components 20 and 22 have been joined and welded. This additional positive-locking connection can be implemented in a "welding cartridge" provided during the assembly process and serve as an additional safety device to prevent the components 20 and 22 from coming apart unintentionally in the event of incorrect welding, thus minimizing the risk of the components 20 and 22 detaching unintentionally.In other words, the positive locking mechanism, created by melting a plastic bridge into the second component 22 (decorative panel) to be attached, can secure it against loss during vehicle operation. This positive locking connection can therefore be achieved after welding both components 20 and 22, for example, using one or more specially integrated sonotrodes 69, which perform the melting process. The welding or melting of the plastic bridge can be carried out in the same system (assembly step) as the series welding. For the aforementioned positive locking mechanism (e.g., twice within the component), two additional sonotrodes 69 can be integrated into the welding system.

[0042] The resulting positive fit can be detected by camera using the mushroom-shaped head that forms during the process. The mushroom-shaped form of the coupling area 46 is particularly well-suited for reliable camera detection. A further step of the process can therefore involve verifying the positive fit using a camera. This can preferably be done automatically.

[0043] Preferably, the retaining element 40 is movable in a direction 68 perpendicular to the axial direction 54 relative to the first component 20, in particular the wall 42. For this purpose, a gap can be provided, particularly in the radial direction of the opening 38, between the receiving area 44 of the retaining element 40 and the first component 20 or its wall 42. This gap is Fig. 4 is illustrated by arrows 70 and is, for example, a maximum of 0.6 mm. The direction 68 preferably runs in the vertical direction of the vehicle. Thus, a longitudinal web of the retaining element 40, which is shaped into a mushroom head, can previously function as a kind of tuning surface in the vertical direction of the vehicle (z-tuning surface) within the component assembly. This allows the air guide device 10 to be manufactured and, in particular, assembled with minimal effort.

[0044] As in Fig. As shown in Figure 4, the retaining element 40 on the first side 60 extends beyond the first component 20 by a length 72, where this length 72 is, for example, 8 mm. The retaining element 40 is, for example, rib-shaped. A rib thickness 74 of the retaining element 40 is, for example, at least 1.2 mm. In a thinner version, for example, support ribs are used.

[0045] The sonotrode 69, for example, has an inner diameter 76, which is approximately 6.2 mm. Furthermore, the sonotrode 69 has an outer diameter 78, which is approximately 8 mm. A distance 80 between the sonotrode 69 and an interference contour is, for example, at least 2 mm.

[0046] For example, the retaining element 40 is made of a semi-crystalline plastic. Such a plastic is, for example, polypropylene (PP), polypropylene-ethylene propylene diene monomer (PP / EPDM), or polyethylene terephthalate (PET). Preferably, the retaining element 40 is made of an amorphous plastic, in particular an amorphous plastic mixture. The amorphous plastic mixture comprises, for example, acrylonitrile butadiene styrene copolymer (ABS) and polycarbonate (PC). This means that the retaining element 40 can be made of ABS and PC. The retaining element 40 can thus be manufactured from a composite of ABS and PC (amorphous plastic). Reference symbol list 10 Air guide device 12 Outside 14 Tailgate 16 roof spoilers 18 tailgate part 20 first component 22 second component 24 Air guide surface 26 Trim part 28 Section plane 30 second air guide surface 32 Tear-off edge 34 Rear window 36 third component 38 Opening 40 retaining element 42 wall 44 Recording area 46 coupling area 48 first form 50 second form 52 Investment area 54 axial direction 56 Connection area 58 Base part 60 first page 62 second page 64 End 66 Cross section 68 direction 69 Sonotrodes 70 Arrow 72 Length 74 rib thickness 76 inner diameter 78 Outer diameter 80 distance QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2022 102 401 A1

[0002] DE 10 2016 214 834 A1

[0003] DE 10 2017 007 530 A1

[0004]

Claims

[1] Air guide device (10) for a motor vehicle, comprising a first component (20) which has at least one air guide surface (24) for guiding air flowing towards the air guide device (10) when the motor vehicle is in motion, and comprising a second component (22) formed separately from the first component (20) which is held on the first component (20), characterized by , that one of the components (20) has an opening (38) and the other of the components (22) has a retaining element (40) which extends at least partially through the opening (38) and which has a coupling area (46) formed by at least local melting of the retaining element (40), via which the retaining element (40) is positively connected to the component (20) having the opening (38). [2] Air guide device (10) according to claim 1, characterized by, that the coupling area (46) has a contact area (52) over which the retaining element (40) can be supported or supported in the axial direction (54) of the opening (38) on a wall (42) of the component (20) having the opening (38) which limits the opening (38). [3] Air guide device (10) according to claim 1 or 2, characterized by , that the retaining element (40) is connected via a connecting area (56) to a base part (58) of the component (22) comprising the retaining element (40) and protrudes obliquely or perpendicularly from the base part (58), wherein the connecting area (56) is arranged on a first side (60) of the opening (38) and the coupling area (46) is arranged on a second side (62) of the opening (38) that differs from the first side (60). [4] Air guide device (10) according to one of the preceding claims, characterized by , that the coupling area (46) has a cross-section (66) shaped as a circular segment. [5] Air guide device (10) according to one of the preceding claims, characterized by , that the second component (22) is designed as a cladding part (26). [6] Air guide device (10) according to one of the preceding claims, characterized by , that the air guide device (10) is designed as a roof spoiler (16), in particular a roof edge spoiler. [7] Air guide device (10) according to one of the preceding claims, characterized by , that the components (20, 22) are welded together. [8] Air guide device (10) according to one of the preceding claims, characterized by , that the retaining element (40) is movable in a direction (68) perpendicular to the axial direction (54) of the opening (38) relative to the component (20) having the opening (38). [9] Arrangement of an air guide device (10) according to one of the preceding claims on an outside (12) of a motor vehicle. [10] Method for manufacturing an air guide device (10) for a motor vehicle comprising a first and a second component (20, 22), wherein the first component (20) has at least one air guide surface (24) provided for guiding air flowing towards the air guide device (10) when the motor vehicle is in motion, characterized by the steps: • Providing the components (20, 22), wherein one of the components (20) has an opening (38) and the other of the components (22) has a retaining element (40); • Passing the retaining element (40) through the opening (38); and • At least local melting of the retaining element (40) which is passed at least partially through the opening (38), thereby forming a coupling area (46) through which the retaining element (40) is positively connected to the component (20) having the opening (38).

Images