Device for reinforcing a structural element
By designing two interconnected carriers to increase the connecting surface of the adhesive, the problem of poor connection between the carrier and the structural elements in the prior art is solved, and a better cavity enhancement effect is achieved, and the device is cost-effective.
Patent Information
- Application Number
- CN202380051760.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-07-14
- Filing Date
- 2023-07-06
- Publication Date
- 2025-02-25
AI Technical Summary
In the prior art, when connecting the carrier to the structural element, it is difficult to achieve the optimal connection effect, resulting in poor cavity enhancement effect.
By designing two interconnected carriers, a new integral carrier is provided, enlarging the connecting surface of the adhesive, thereby better connecting the carrier to the structural elements.
The connection quality of the carrier and structural elements is significantly improved, the cavity enhancement effect is improved, and the device can be realized under low cost and simple manufacturing conditions.
Smart Images
Figure CN119522178A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a device for reinforcing a structural element and to a reinforced structural element system in a motor vehicle. Background Art
[0002] In many cases, components, such as bodies and / or frames of vehicles and transports, in particular water or land or air vehicles, have structures with cavities in order to achieve a lightweight structure. However, these cavities cause various problems. Depending on the type of cavity, it must be sealed to prevent the ingress of moisture and dirt that can cause corrosion of the component. It is often also desirable to significantly strengthen the cavity and therefore the component, but keep the weight low. It is often also necessary to stabilize the cavity and therefore the component to reduce noise that would otherwise be transmitted along or through the cavity. Many of these cavities have irregular shapes or narrow dimensions, making them difficult to properly seal, strengthen and damp.
[0003] Therefore, in particular in automobile construction and in aircraft and boat construction, sealing elements (English: baffles) are used to seal and / or acoustically isolate cavities, or reinforcing elements (English: reinforcers) are used to reinforce cavities.
[0004] exist Figure 1 Schematically shows the body of a motor vehicle. The body 10 has a plurality of different structures with cavities, such as pillars 14 and beams or support bodies 12. Such structural elements 12, 14 with cavities are usually sealed or reinforced with sealing and / or reinforcement elements 16.
[0005] Figure 2 A known approach for sealing and / or reinforcing such a structural element with a cavity in a motor vehicle is schematically shown. Figure 2 The reinforcing element 16 in the structural element 12, 14 is shown before the expansion of the expandable material 13. In this example, the expandable material 13 is arranged on the surface of the carrier element 11 located near the structural elements 12, 14. The carrier element 11 has an M-shaped or W-shaped cross section in this embodiment. The rigidity of the carrier element 11 is thereby increased.
[0006] Such a carrier element 11 or reinforcing element 16 according to the prior art is designed in cross section in such a way that it can be produced in a simple manner using an injection molding process. For this purpose, adjacent surfaces of the carrier element 11 form an angle 15 that is slightly greater than 90°. By designing the carrier element 11 cross section in this way, the injection-molded carrier element 11 can be easily removed from the mold of the injection molding machine.
[0007] The surface of the carrier element 11 facing the inner side of the structural elements 12, 14 respectively usually has a checkerboard shape. In this case, the connecting material or expandable material 13 can be arranged only on the surface located near the structural elements 12, 14 respectively.
[0008] A disadvantage of such a reinforcing element 16 is that the carrier element 11 cannot be connected to the structural elements 12 , 14 in an optimal manner, since the surface of the carrier element 11 which is located in the vicinity of the structural elements 12 , 14 and is therefore suitable for applying the connecting material 13 is not sufficient for this purpose. Summary of the invention
[0009] The object of the present invention is therefore to provide an improved device of the type mentioned at the outset, which allows a better connection of a carrier to a structural element. In addition, the device should be cost-effective and simple to produce.
[0010] The object is achieved by a device for reinforcing a structural element in a motor vehicle, the device comprising: a first carrier, which comprises an outer side with a mostly closed surface and an inner side with a surface mostly defined by ribs, a first expandable material being at least partially arranged on the closed surface of the outer side; a second carrier, which comprises an outer side with a mostly closed surface and an inner side with a surface mostly defined by ribs, a second expandable material being at least partially arranged on the closed surface of the outer side; the first carrier and the second carrier are connected to each other so that the inner sides of the carriers face each other; and the outer sides of the carriers are respectively facing the walls of the structural element in the use state, so that the first expandable material and the second expandable material connect the carriers to the walls of the structural element after expansion.
[0011] The advantage of this solution is that the carrier can be connected to the structural element significantly better. The closed or substantially closed surface of the carrier element provides the possibility of applying the adhesive on both sides of the carrier in a surface-covering manner and thus better connecting the carrier element to the structural element. As a result, a significantly better cavity reinforcement can be achieved compared to arrangements according to the prior art.
[0012] The core idea of the invention is that by providing two carriers connected to each other, a new integral carrier can be provided, which provides a larger connection surface for the adhesive to connect the integral carrier to the structural element. The carrier can be assembled modularly to a certain extent. As a result, the device can be ideally adapted to the respective situation.
[0013] In an exemplary embodiment, the second expandable material of the second carrier is arranged in an outer edge region in such a way that, when expanded, the second expandable material connects the second carrier both to the wall of the structural element and to the inner side of the first carrier.
[0014] This has the advantage that, after the expansion of the second expandable material, a mechanically load-bearing connection is produced between the supports.
[0015] In an exemplary embodiment, the second expandable material is arranged on at least 40%, in particular at least 50%, in particular at least 60%, in particular at least 70%, in particular at least 80% of the outer edge region.
[0016] This has the advantage that larger surfaces of the two carriers can be connected to one another and / or that a connection to the first carrier can be realized on different sides of the second carrier, both of which lead to a more mechanically load-bearing connection between the carriers.
[0017] In an exemplary embodiment, the second expandable material is arranged in the outer edge region at a predefined distance from the ribs of the first carrier and substantially parallel so that upon expansion an elongated connection is formed between the first and second carrier by the second expandable material.
[0018] This has the advantage that suitable connection areas of the first carrier can thereby be used in order to achieve a connection between the carriers that is as mechanically stress-resistant as possible.
[0019] In one exemplary embodiment, the predefined distance is between 0.1 mm and 5 mm, in particular between 0.2 mm and 3 mm, in particular between 0.2 mm and 1 mm.
[0020] In an exemplary embodiment, the first carrier is larger than the second carrier.
[0021] In an exemplary embodiment, the area of the inner side of the second carrier is 10% to 80%, in particular 20% to 70%, in particular 30% to 60% of the area of the inner side of the first carrier.
[0022] In an exemplary embodiment, the outer side of the first carrier and / or the outer side of the second carrier has a closed surface over at least 70%, in particular at least 75%, in particular at least 80%.
[0023] This has the advantage that a larger surface is thereby available for connection to the structural element, so that better reinforcement can be achieved.
[0024] In an exemplary embodiment, the inner side of the first carrier and / or the inner side of the second carrier has a surface defined by ribs over at least 70%, in particular at least 85%, in particular at least 80%.
[0025] In an exemplary embodiment, the first carrier and the second carrier are connected to one another via at least two mechanical connections, each carrier comprising two coupling elements which can be mechanically connected to coupling elements of the respective other carrier.
[0026] This has the advantage that a pre-fixation of the supports to one another can thereby be achieved in a cost-effective and reliable manner.
[0027] In an exemplary embodiment, the coupling element is configured as a clip and a clip opening.
[0028] In one exemplary embodiment, the coupling element on the second carrier is arranged in an edge region of the inner side, and the coupling element on the first carrier is arranged on the inner side of the first carrier.
[0029] In an exemplary embodiment, the mechanical connection fixes the first carrier and the second carrier to one another for the purpose of mounting, rather than mechanically connecting the carriers to one another for a defined load situation.
[0030] In an exemplary embodiment, the first expandable material and the second expandable material have the same composition.
[0031] In an alternative embodiment, the first expandable material and the second expandable material do not have the same composition, the materials differing in particular by different expansion rates.
[0032] In an exemplary embodiment, the first expandable material and / or the second expandable material has an expansion ratio greater than 100% and less than 800%, in particular greater than 200% and less than 700%, in particular greater than 250% and less than 600%.
[0033] In principle, different types of materials can be used as expandable materials. For example, the following commercially available adhesives can be used: and
[0035] In an exemplary embodiment, the first expandable material and / or the second expandable material can be cured by a temperature above 120°.
[0036] In an exemplary embodiment, the first carrier and / or the second carrier together with the expandable material respectively arranged thereon are produced by a two-component injection molding process.
[0037] This has the advantage that a cost-effective device can be produced thereby.
[0038] In an exemplary embodiment, the carrier comprises plastic, fiber-reinforced plastic (in particular carbon fiber-reinforced plastic or glass fiber-reinforced plastic) or a combination of these materials.
[0039] Furthermore, the object stated at the outset is achieved by a reinforced structural element system in a motor vehicle, comprising a structural element; a device according to the above description, which is arranged in a structural component; and an expanded material connecting the carrier to the structural element and connecting the carriers to one another. BRIEF DESCRIPTION OF THE DRAWINGS
[0040] The details and advantages of the present invention are described below with the aid of exemplary embodiments and with reference to the schematic drawings. The drawings are as follows:
[0041] Figure 1 An exemplary view showing a vehicle body;
[0042] Figure 2 A schematic diagram showing an exemplary device according to the prior art;
[0043] Figure 3a and 3b A schematic diagram showing an exemplary first carrier;
[0044] Figure 4a and 4b A schematic diagram showing an exemplary second carrier;
[0045] Figure 5 a schematic diagram showing an exemplary apparatus; and
[0046] Figure 6a and 6b A schematic diagram of an exemplary apparatus is shown. DETAILED DESCRIPTION
[0047] exist Figure 3a and 3b An exemplary first carrier 2 is shown in FIG. Figure 3a In the figure, the outer side of the first carrier 2 can be seen, which has a largely closed surface on which the first expandable material 4 is arranged. Figure 3b The inner side of the carrier 2 can be seen in FIG. 1 , which has a surface that is largely defined by ribs 6 .
[0048] In this embodiment, the first carrier 2 has a first opening 8 extending from the outer side to the inner side.
[0049] exist Figure 4a and 4b An exemplary second carrier 3 is shown in FIG. Figure 4a The inner side of the second carrier 3 can be seen in FIG, which has a surface that is largely defined by ribs 6. Figure 4bIn the figure the outer side of the second carrier 3 can be seen, which has a largely closed surface on which the second expandable material 5 is arranged.
[0050] In this embodiment, the second carrier 2 has a second opening 9 extending from the outer side to the inner side.
[0051] exist Figure 5 , an exemplary device 1 is shown, which comprises both a first carrier 2 and a second carrier 3. In this case, the carriers 2, 3 are connected to one another in such a way that the inner sides of the carriers 2, 3 face one another.
[0052] In this exemplary embodiment, the first carrier 2 and the second carrier 3 each have two connecting elements 7 which can each be mechanically connected to a connecting element 7 of the other carrier 2 , 3 .
[0053] exist Figure 6a and 6b An exemplary device 1 is shown in FIG. Figure 6b shows the situation before the first carrier 2 and the second carrier 3 are connected, and Figure 6a The device 1 is shown with mutually connected carriers 2 , 3 . In this example, the carriers 2 , 3 are also mechanically connected to one another in that a coupling element 7 engages in a respective coupling element 7 of the other carrier 2 , 3 .
[0054] The openings 8 , 9 of the carriers 2 , 3 are designed in such a way that they substantially overlap in the connected state of the carriers 2 , 3 , so that the device 1 has an opening through both the first carrier 2 and the second carrier 3 .
[0055] Reference numerals list
[0056] 1 device
[0057] 2First carrier
[0058] 3 Second carrier
[0059] 4. The first expandable material
[0060] 5. Second expandable material
[0061] 6 ribs
[0062] 7Connection elements
[0063] 8 First Opening
[0064] 9 Second opening
[0065] 10 Body
[0066] 11 Carrier
[0067] 12 Structural elements
[0068] 13 Adhesive
[0069] 14 Structural elements
[0070] 15 Angle
[0071] 16 Reinforcement components
Claims
1. A device (1) for reinforcing a structural element (12, 14) in a motor vehicle, the device comprising: a first carrier (2) comprising an outer side with a largely closed surface and an inner side with a surface largely defined by ribs (6), on the closed surface of the outer side a first expandable material (4) is at least partially arranged; a second carrier (3) comprising an outer side with a largely closed surface and an inner side with a surface largely defined by ribs (6), on the closed surface of the outer side a second expandable material (5) is at least partially arranged; - the first carrier (2) and the second carrier (3) are connected to each other so that the inner sides of the carriers (2, 3) face each other; and The outer sides of the carriers (2, 3) face the walls of the structural elements (12, 14) in the use state, so that the first expandable material (4) and the second expandable material (5) connect the carriers (2, 3) to the walls of the structural elements (12, 14) after expansion.
2. The device according to claim 1, wherein: The second expandable material (5) of the second carrier (3) is arranged in an outer edge region so that when expanded, the second expandable material (5) connects the second carrier (3) both to the wall of the structural element (12, 14) and to the inner side of the first carrier (2).
3. The device according to claim 2, wherein: The second expandable material (5) is arranged in the outer edge region at a predefined distance from and substantially parallel to the ribs (6) of the first carrier (2), so that when expanded, an elongated connection is formed between the first and second carriers (2, 3) by the second expandable material (5).
4. The device according to claim 3, wherein: The predefined distance is between 0.1 mm and 5 mm.
5. A device according to any one of the preceding claims, wherein: The first carrier (2) is larger than the second carrier (3).
6. A device according to any one of the preceding claims, wherein: The area of the inner side of the second carrier (3) is 10% to 80% of the area of the inner side of the first carrier (2).
7. A device according to any one of the preceding claims, wherein: The outer side of the first carrier (2) and / or the outer side of the second carrier (3) has a closed surface over at least 70%.
8. A device according to any one of the preceding claims, wherein: The inner side of the first carrier (2) and / or the inner side of the second carrier (3) has a surface defined by ribs (6) over at least 70%.
9. The device according to any one of the preceding claims, wherein: The first carrier (2) and the second carrier (3) are connected to each other via at least two mechanical connections, and each carrier (2, 3) comprises two coupling elements (7) which can be mechanically connected to the coupling elements (7) of the respective other carrier (2, 3).
10. The device according to claim 9, wherein: The coupling element (7) is configured as a clip and a clip opening.
11. The device according to claim 9 or 10, wherein: The coupling element (7) on the second carrier (3) is arranged in an inner edge region, and the coupling element (7) on the first carrier (2) is arranged on the inner side of the first carrier.
12. The device according to any one of claims 9 to 11, wherein: The mechanical connection fixes the first carrier (2) and the second carrier (3) to each other for the purpose of assembly, but does not mechanically connect the carriers to each other for a defined load situation.
13. The device according to any one of the preceding claims, wherein: The first expandable material (4) and the second expandable material (5) have the same composition.
14. A device according to any one of the preceding claims, wherein: The first expandable material (4) and / or the second expandable material (5) has an expansion ratio greater than 100% and less than 800%.
15. A reinforced structural element (12, 14) system in a motor vehicle, the system comprising: - structural elements (12, 14); - a device (1) according to any one of claims 1 to 14, arranged in a structural element (12, 14); The expanded material (4, 5) connects the carrier (2, 3) to the structural element (12, 14) and connects the carrier (2, 3) to one another.