Bottom guard plate for vehicle
By arranging composite material layers on both sides of the support plate of the vehicle underbody guard and opening through holes on the support plate to form a raised structure, the problem of easy falling off and delamination of the metal underbody guard is solved, the durability and protection effect are improved, and material costs are saved.
Patent Information
- Application Number
- CN202422986759.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-12-04
AI Technical Summary
Metal vehicle underbody guards are prone to coating peeling, hollowing and delamination under long-term exposure and frequent impact, which weakens the protection of the battery.
Composite material layers are arranged on both sides of the support plate, and through holes are opened on the support plate to form a raised structure. The composite material layers are connected as a whole through the through holes to enhance the bonding strength. The raised structure absorbs energy during impact and improves the protection effect.
The aging resistance and corrosion resistance of the bottom guard plate are enhanced, delamination and displacement are avoided, the service life and protection effect of the battery are increased, and the cost of raw materials is saved.
Smart Images
Figure CN223327433U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automobile structure protection devices, and in particular to an underbody guard plate for a vehicle. Background Art
[0002] With the development of new energy, electric vehicles are becoming increasingly popular. As a core component of electric vehicles, batteries are typically installed under the vehicle's chassis. However, during driving, batteries are easily damaged by road scrapes or impacts from flying stones. Therefore, an underbody guard is often installed to protect the batteries.
[0003] Currently, vehicle underbody guards are often made of metal materials. However, metal underbody guards are prone to problems such as coating peeling, hollowing and delamination under long-term exposure and frequent impact, which weakens their protective effect. Utility Model Content
[0004] In order to solve the above technical problems, the present application provides a vehicle underbody guard plate, which avoids the occurrence of delamination and displacement and improves the protection effect.
[0005] According to some embodiments, the present application provides a vehicle underbody guard plate, comprising:
[0006] A support plate, wherein a plurality of through holes are formed on the support plate, and edges of the through holes extend toward at least one side of the support plate to form a protruding structure;
[0007] A composite material layer covers both sides of the support plate.
[0008] In some embodiments of the present application, the composite material layers disposed on both sides of the support plate are connected to form an integrated structure through the through holes.
[0009] In some embodiments of the present application, the area of the composite material layer is larger than the area of the support plate, and the support plate is wrapped in the composite material layer.
[0010] In some embodiments of the present application, the protruding structure is embedded in the composite material layer.
[0011] In some embodiments of the present application, the cross-sectional area of the protruding structure gradually decreases in a direction away from the support plate.
[0012] In some embodiments of the present application, the plurality of through holes are evenly arranged on the support plate, and the extension directions of the plurality of protrusion structures are all the same.
[0013] In some embodiments of the present application, the plurality of through holes are evenly arranged on the support plate, and the protrusion structures in two adjacent rows extend in different directions.
[0014] In some embodiments of the present application, the composite material layer is a fiber-reinforced composite material layer, and some fibers in the composite material layer pass through the through holes.
[0015] In some embodiments of the present application, the matrix of the composite material layer is a thermosetting resin or a thermoplastic resin, and the fibers account for 30-80% by mass of the fiber-reinforced composite material.
[0016] In some embodiments of the present application, the thickness of the vehicle bottom guard plate is 0.5-30 mm.
[0017] The vehicle underbody guard provided by this application can achieve the following beneficial technical effects:
[0018] The vehicle underbody guard provided in the present application, by arranging composite material layers on both sides of the support plate, ensures the supporting strength of the underbody guard plate while also increasing the aging resistance, corrosion resistance and other properties of the underbody guard plate; by opening multiple through holes on the support plate and extending the edges of the through holes to form a raised structure, not only is the bonding strength between the composite material layer and the support plate increased, delamination and displacement are avoided, but the raised structure can also absorb impact energy through deformation when impacted, thereby improving the life of the vehicle underbody guard plate and the protection effect on the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the present application, not all embodiments. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.
[0020] Figure 1 1 is a schematic diagram of the layer structure of a vehicle underbody guard plate according to an embodiment of the present application;
[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle support plate;
[0022] Figure 3 yes Figure 2 Front view of the middle support plate.
[0023] Reference numerals:
[0024] 100, support plate; 110, through hole; 120, protrusion structure;
[0025] 200. Composite material layer. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other in any way.
[0027] Currently, vehicle underbody guards are often made of metal or composite materials. However, metal underbody guards are prone to problems such as coating peeling, hollowing and delamination under long-term exposure and frequent impact. Composite underbody guards are made of laminated composites and are also prone to delamination and degumming, which weakens the life of the underbody guard and its protection of the battery.
[0028] To solve the above problems, by arranging composite material layers on both sides of the support plate, while ensuring the supporting strength of the bottom guard plate, the aging resistance, corrosion resistance and other properties of the bottom guard plate are also increased; by opening multiple through holes on the support plate and extending the edges of the through holes to form a raised structure, the bonding strength between the composite material layer and the support plate is increased, and delamination and displacement are avoided. The raised structure can also absorb impact energy through deformation when impacted, thereby improving the life and protection effect of the bottom guard plate.
[0029] The vehicle underbody guard provided in accordance with the present application is described in detail below with reference to the accompanying drawings.
[0030] An exemplary embodiment of the present application provides a vehicle underbody guard, such as Figure 1 and Figure 2 As shown, the vehicle underbody guard plate includes a support plate 100 and a composite material layer 200, wherein the composite material layer 200 covers the two sides of the support plate 100 perpendicular to the z-axis direction, that is, the support plate 100 is wrapped in the middle of the two layers of composite material layers 200; the support plate 100 is provided with a plurality of through holes 110, and the edges of the through holes 110 extend toward at least one side of the support plate 100, that is, the z-axis direction, to form a protruding structure 120.
[0031] The through hole 110 and the protruding structure 120 in this embodiment can be formed by punching or stamping. Of course, other methods can also be used, all of which are within the scope of protection of this application.
[0032] By arranging composite material layers 200 on both sides of the support plate 100, the supporting strength of the bottom guard plate is ensured while the aging resistance, corrosion resistance and other properties of the bottom guard plate are increased; by opening a plurality of through holes 110 on the support plate 100 and extending the edges of the through holes 110 to form a protruding structure 120, the bonding strength between the composite material layer 200 and the support plate 100 is increased, and delamination and displacement are avoided. When impacted, the protruding structure 120 can also absorb impact energy through deformation, thereby improving the life and protection effect of the bottom guard plate.
[0033] In some embodiments, the composite material layers 200 disposed on both sides of the support plate 100 are connected into an integrated structure through the through holes 110. This design greatly improves the bonding strength between the support plate 100 and the composite material layers 200, and avoids delamination during use.
[0034] In some embodiments, continue to refer to Figure 1 The area of the composite material layer 200 is larger than that of the support plate 100, and the support plate 100 is encapsulated in the composite material layer 200. Encapsulation here means that the composite material layer 200 not only covers the two surfaces of the support plate 100 perpendicular to the z-axis direction, but also covers the four side surfaces of the support plate 100. This not only provides protection for the four side surfaces of the support plate 100, but also ensures that the two layers of composite material layers 200 and the encapsulated support plate 100 are connected as an integrated structure, thereby improving the bonding strength.
[0035] Since the raised structure 120 embedded in the composite material layer 200 can prevent the support plate 100 and the composite material layer 200 from displacing in the plane direction of the x-axis and y-axis, the area of the composite material layer 200 only needs to be slightly larger than the area of the support plate 100 to ensure that the composite material layers 200 on both sides of the support plate 100 can be connected into an integrated structure at the edge of the support plate 100. There is no need to set the area of the composite material layer 200 to be much larger than the area of the support plate 100 to ensure that no displacement occurs between the two. This saves raw material costs while ensuring the structural strength of the vehicle underbody guard plate.
[0036] In some embodiments, the raised structure 120 is embedded in the composite material layer 200. The raised structure 120 increases the contact area between the support plate 100 and the composite material layer 200. The setting of the raised structure 120 also avoids the displacement of the support plate 100 and the composite material layer 200 in the plane direction of the x-axis and y-axis, thereby increasing the bonding strength between the two. In addition, the raised structure 120 can deform to absorb impact energy when subjected to external impact, thereby further increasing the impact resistance of the vehicle bottom guard plate.
[0037] In some embodiments, the cross-sectional area of the protrusion structure 120 gradually decreases in the direction away from the support plate 100, that is, gradually converges inward. This shape of the protrusion structure 120 can be directly formed when punching the support plate 100, simplifying the operation steps.
[0038] In some embodiments, as Figure 3 As shown, the through holes 110 are evenly distributed on the support plate 100, meaning that the raised structures 120 are evenly distributed on the support plate 100. The raised structures 120 all extend in the same direction, toward one side of the support plate 100. Since one side of the vehicle underbody guard needs to be flat, the raised structures 120 are all positioned toward one side, so the composite material layer 200 on the other side does not need to be too thick, which helps reduce the overall thickness of the vehicle underbody guard.
[0039] In some embodiments, the protruding structures 120 uniformly arranged on the support plate 100 may extend in different directions. For example, two adjacent rows of protruding structures 120 may extend in different directions, i.e., one row facing upward and the other row facing downward (up and down here refers to the z-axis direction); in other embodiments, the protruding structures 120 may be arranged in one row facing upward and the other row facing downward, or in two rows facing upward and two rows facing downward. Those skilled in the art may adjust this according to actual conditions, and all are within the scope of protection of this application. The different orientations of the protruding structures 120 can increase the bonding strength between the composite material layer 200 on both sides and the support plate 100.
[0040] In some embodiments, support plate 100 is made of a metal material, such as a lightweight, high-strength metal material such as steel, aluminum, or titanium alloy; composite material layer 200 is a fiber-reinforced composite material layer, and some fibers in composite material layer 200 are able to pass through through-holes 110 of support plate 100. Reinforced fibers, such as glass fiber, carbon fiber, or basalt fiber, are examples. The ability of composite material layer 200 to pass through through-holes 110 further enhances the bond strength between composite material layer 200 and support plate 100, and also increases the strength of the composite material at through-holes 110, thereby increasing the overall strength of the vehicle underbody panel.
[0041] In some embodiments, the matrix of the composite material layer 200 can be a thermoplastic resin, such as at least one of polypropylene (PP), nylon (PA), high-density polyethylene (HDPE) or polyethylene terephthalate (PET); the matrix of the composite material layer 200 can also be a thermosetting resin, such as at least one of epoxy resin, polyurethane resin or modified acrylic resin. Those skilled in the art can select according to actual needs and will not go into details here.
[0042] In this embodiment, the fiber accounts for 30-80% by weight of the fiber reinforced composite material, and the weight of the prepreg (i.e., the mixture of fiber and resin matrix) is 200-2000 g / m 2 Those skilled in the art can adjust the layout of the fibers and resins in the composite material layer 200 through material placement design to adjust the overall or local strength of the vehicle underbody guard.
[0043] In some embodiments, the thickness range of the vehicle underbody guard is 0.5-30 mm. The vehicle underbody guard within this thickness range can not only ensure structural strength and protection effect, but also reduce space occupation and waste of raw materials. Technical personnel in this field can adjust the total thickness of the vehicle underbody guard according to actual needs by adjusting the thickness of the composite material layer 200.
[0044] The preparation process of the above-mentioned vehicle underbody guard is as follows:
[0045] Step 1: Preparation of the support plate 100 : Punch the plate to obtain the support plate 100 with the protruding structure 120 .
[0046] Step 2: Pre-treat the support plate 100. Surface roughening: Sandblasting the surface of the support plate 100 increases its surface roughness and improves its physical bonding with the composite material layer 200. Surface activation: Soaking the support plate 100 in a coupling agent forms a film on its surface, improving its chemical bonding with the composite material layer 200. These treatments help enhance the surface bonding of the support plate 100.
[0047] Step 3: Preparation of composite material layer 200. When the matrix is a thermoplastic material, modified plastic particles are extruded, passed into a mold to impregnate the fibers, and then passed through rollers and cooled to form a fiber-reinforced thermoplastic tape. When the matrix is a thermosetting material, the resin matrix is dissolved or melted in an appropriate solvent, mixed, and then the reinforcing material is impregnated with the resin matrix. Drying is performed under controlled temperature and humidity conditions to form a fiber-reinforced thermosetting tape. After cutting, the anisotropic composite material layer 200 is obtained.
[0048] Step 4: Laying down the layers: Lay down the composite material layer 200, the support plate 100, and the composite material layer 200 in the mold in sequence.
[0049] Step 5: Mold Closing. The laminated composite material is pressurized and heated. The composite material layer 200 melts under the heat, passes through the through-holes 110 of the support plate 100, and forms a physical fit with the support plate 100 under pressure. After solidification and cooling, the mold is released to obtain the vehicle underbody guard.
[0050] The vehicle underbody guard provided by the present application has a through hole 110 formed on the support plate 100, so that the composite material layers 200 on both sides of the support plate 100 can pass through the through hole 110 and are combined into an integrated structure in a mold after being heated, pressurized and cured. In addition, the contact area between the composite material layer 200 and the support plate 100 is increased by the provision of the raised structure 120. The above provision greatly increases the interlayer bonding strength of the underbody guard, avoids delamination during use, and increases the life of the underbody guard. In addition, the composite material layer 200 covers the support plate 100, and the support plate 100 provides strength support for the underbody guard, and the composite material layer 200 provides durability for the underbody guard. The life of the vehicle underbody guard is increased, the cost of raw materials is saved, and the underbody guard is corrosion-resistant and wear-resistant, thereby enhancing the protection effect on the battery.
[0051] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the scope of protection of this application.
[0052] It should be noted that, in the description of this application, the terms "upper", "lower", "front", "back", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0054] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0055] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.
[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A vehicle underbody guard, characterized in that: The vehicle bottom guard plate comprises: A support plate, wherein a plurality of through holes are formed on the support plate, and edges of the through holes extend toward at least one side of the support plate to form a protruding structure; A composite material layer covers both sides of the support plate.
2. The vehicle underbody guard according to claim 1, wherein: The composite material layers arranged on both sides of the support plate are connected into an integrated structure through the through holes.
3. The vehicle underbody guard according to claim 1, wherein: The area of the composite material layer is larger than that of the support plate, and the support plate is wrapped in the composite material layer.
4. The vehicle underbody guard according to claim 1, wherein: The raised structure is embedded in the composite material layer.
5. The vehicle underbody guard according to claim 1, wherein: The cross-sectional area of the protruding structure gradually decreases in a direction away from the supporting plate.
6. The vehicle underbody guard according to claim 1, wherein: The plurality of through holes are evenly arranged on the support plate, and the plurality of protrusion structures extend in the same direction.
7. The vehicle underbody guard according to claim 1, wherein: The plurality of through holes are evenly arranged on the support plate, and the protrusion structures in two adjacent rows extend in different directions.
8. The vehicle underbody guard according to claim 1, wherein: The support plate is a metal plate, the composite material layer is a fiber-reinforced composite material layer, and some fibers in the composite material layer pass through the through holes.
9. The vehicle underbody guard according to claim 8, characterized in that: The matrix of the composite material layer is a thermosetting resin or a thermoplastic resin, and the mass proportion of the fibers in the fiber-reinforced composite material is 30-80%.
10. The vehicle underbody guard according to claim 1, wherein: The thickness of the vehicle bottom guard plate is 0.5-30 mm.