Threshold beam structure and vehicle

Abstract

The utility model relates to vehicle technical field discloses a kind of threshold beam structure and carrier, comprising: threshold beam body, along first direction setting, its inside has cavity;Reinforcing member, be located in cavity, and extend along first direction, its material is composite material;Energy-absorbing member, it is circumferentially arranged around reinforcing member, and is located between reinforcing member and threshold beam body, and energy-absorbing member is connected with threshold beam body. Composite material reinforcing member is used instead of traditional threshold beam inside metal reinforcing structure, utilize the characteristics of high specific strength, high specific stiffness of composite material, can be while greatly reducing threshold beam weight, enhance threshold beam structure performance, realize whole car light weight design, improve vehicle endurance, and energy-absorbing member circumferentially arrangement around reinforcing member, when vehicle side collision occurs, collision energy can be effectively absorbed, avoid threshold beam stress to occur serious deformation, guarantee vehicle safety performance, realized to the effective lateral collision protection of passenger cabin and chassis below battery pack.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a door sill beam structure and a vehicle. Background Technology

[0002] In the new energy vehicle industry, the door sill beam is a key component located below the door in the vehicle body structure. Its core function is structural support and safety protection, achieving effective lateral collision protection for the passenger compartment and the battery pack under the chassis.

[0003] In related technologies, door sill beams are mostly made of welded steel profiles to ensure that the door sill beams can absorb energy through appropriate deformation during a collision. At the same time, the interior of the welded steel profile door sill beams needs to be reinforced with metal plates and metal support structures to ensure the structural strength of the door sill beams.

[0004] However, this would significantly increase the weight of the door sill beam, thereby increasing the overall vehicle weight, which is detrimental to the lightweight design of the vehicle and affects its range. Utility Model Content

[0005] This utility model provides a door sill beam structure and carrier to solve or improve the problem in related technologies where door sill beams are made of steel or aluminum profiles, resulting in a large door sill beam weight, which increases the vehicle weight, is not conducive to the lightweight design of the whole vehicle, and affects the vehicle's range.

[0006] In a first aspect, this utility model provides a door sill beam structure, comprising:

[0007] A threshold beam body is provided along a first direction, and the interior of the threshold beam body has a cavity.

[0008] A reinforcing member is disposed within the cavity, the reinforcing member extends along the first direction, and the material of the reinforcing member is a composite material;

[0009] An energy-absorbing component is disposed within the cavity and circumferentially surrounds the reinforcing member. The energy-absorbing component is located between the reinforcing member and the sill beam body, and is connected to the sill beam body.

[0010] In one optional embodiment, the number of energy-absorbing elements is at least two, and each of the energy-absorbing elements is spaced apart along the first direction.

[0011] In one alternative embodiment, the energy-absorbing component is an injection-molded component, and / or the energy-absorbing component and the reinforcing component are an integral injection-molded structure.

[0012] In one optional embodiment, the sill beam body includes a first component and a second component connected to each other, the first component and the second component being disposed opposite to each other and enclosing to form the cavity, and the energy-absorbing member being connected to both the first component and the second component.

[0013] In one alternative embodiment, the energy-absorbing element is bonded to the sill beam body using foamed structural adhesive.

[0014] In one optional embodiment, the foamed structural adhesive is a strip structure, and the number of foamed structural adhesives is at least two, with each foamed structural adhesive being spaced apart along the circumferential direction of the energy-absorbing element;

[0015] And / or, the foamed structural adhesive is at least one of epoxy foam, polyurethane foam, and polypropylene foam.

[0016] In one alternative embodiment, the reinforcing member is a composite pultruded profile, and / or the reinforcing member is a hollow tubular structure.

[0017] In one alternative implementation, the energy-absorbing element is a mesh structure.

[0018] In one alternative embodiment, the sill beam body is made of metal, and / or the outer wall of the sill beam body is covered with an anti-corrosion layer.

[0019] Secondly, this utility model also provides a carrier, including a threshold beam structure as described in any of the above claims.

[0020] The sill beam structure provided by this utility model uses a composite material reinforcement to replace the traditional metal reinforcement structure inside the sill beam. Utilizing the high specific strength and high specific stiffness of composite materials, the weight of the sill beam can be significantly reduced while its structural performance is significantly enhanced, achieving a lightweight design for the entire vehicle and improving the vehicle's range. Furthermore, the energy-absorbing component is arranged circumferentially around the reinforcement and fills the space between the reinforcement and the sill beam body. In the event of a side collision, it can effectively absorb collision energy, preventing severe deformation of the sill beam under stress and ensuring the vehicle's safety performance. This provides effective side collision protection for the passenger compartment and the battery pack under the chassis. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a front view of the threshold beam structure according to an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 Sectional view of AA;

[0024] Figure 3 for Figure 1 A cross-sectional view of BB.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Threshold beam body; 101. Cavity; 102. First component; 103. Second component; 2. Reinforcing component; 3. Energy-absorbing component; 4. Foamed structural adhesive. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0030] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following is combined Figures 1 to 3 This describes the threshold beam structure and carrier of an embodiment of the present utility model.

[0032] According to an embodiment of this utility model, a door sill beam structure is provided, including a door sill beam body 1, a reinforcing member 2, and an energy-absorbing member 3. Specifically, as... Figure 1 As shown, the sill beam body 1 is arranged along a first direction, and the interior of the sill beam body 1 has a cavity 101. A reinforcing member 2 is disposed within the cavity 101, extends along the first direction, and is made of a composite material. Optionally, the material density of the reinforcing member 2 is 1.9 g / cm³. 3 -2.0g / cm 3 Along the first direction, the tensile strength is >1000MPa and the tensile modulus is >40GPa; along the second direction, the tensile strength is >200MPa and the tensile modulus is >18MPa; the flexural strength is >1000MPa and the flexural modulus is >40GPa. The reinforcing member 2 replaces the traditional metal support structure inside the sill beam, serving as the main load-bearing component and strengthening the structural performance of the sill beam. Furthermore, the density of the composite material is lower than that of the metal material, significantly reducing the weight of the sill beam and meeting lightweight design requirements.

[0033] like Figure 2 and Figure 3 As shown, the energy-absorbing component 3 is disposed within the cavity 101, surrounding the reinforcing component 2 circumferentially, and positioned between the reinforcing component 2 and the sill beam body 1. That is to say, as... Figure 2 and Figure 3 As shown, in the planes containing the second and third directions, the energy-absorbing element 3 surrounds and encloses the reinforcing element 2. Optionally, the material density of the energy-absorbing element 3 is 1.5 g / cm³. 3 -1.6g / cm 3 The tensile strength is >200MPa, the flexural strength is >300MPa, and the flexural modulus is >12000MPa. The energy-absorbing component 3 primarily functions as a buffer to absorb energy, effectively providing protection against side collisions. It also enhances the overall strength. The energy-absorbing component 3 is connected to the sill beam body 1, optionally using an adhesive connection. This avoids the difficulties of welding energy-absorbing materials, simplifies assembly steps, and improves production efficiency.

[0034] This design uses a composite material reinforcement 2 to replace the traditional metal reinforcement structure inside the sill beam. By utilizing the high specific strength and high specific stiffness of composite materials, the weight of the sill beam can be significantly reduced while its structural performance is significantly enhanced, achieving a lightweight design for the entire vehicle and improving the vehicle's range. Furthermore, the energy-absorbing component 3 is arranged circumferentially around the reinforcement 2 and fills the space between the reinforcement 2 and the sill beam body 1. In the event of a side collision, it can effectively absorb collision energy, preventing the sill beam from undergoing severe deformation and ensuring the vehicle's safety performance. This design provides effective side collision protection for the passenger compartment and the battery pack under the chassis.

[0035] Optionally, in some embodiments of this utility model, such as Figure 1 As shown, the number of energy-absorbing components 3 is at least two, and each energy-absorbing component 3 is spaced apart along the first direction. It should be noted that the number of energy-absorbing components 3 can be specifically set according to the actual collision requirements of the sill beam. For example, the middle area and both ends (i.e., the area connecting with the A-pillar / B-pillar) of the sill beam are high-risk collision areas; therefore, as... Figure 1 As shown, energy-absorbing components 3 are provided at both ends and in the middle of the reinforcing member 2 to enhance the protection capability of high-risk areas and avoid material waste in low-risk areas. This arrangement forms a segmented energy-absorbing layout, which can reduce material usage and lower material costs while ensuring energy absorption efficiency, thus helping to reduce the weight of the sill beam. In addition, the spaced energy-absorbing components 3 can work synergistically with the composite material properties of the reinforcing member 2 to enhance the stiffness of local areas and achieve a gradient stiffness design for the sill beam.

[0036] Optionally, in some embodiments of this utility model, the energy-absorbing component 3 is an injection-molded part, and the energy-absorbing component 3 and the reinforcing component 2 are an integral injection-molded structure. It should be noted that the injection area of ​​the already formed reinforcing component 2 is first roughened by grinding to enhance the interface adhesion. After grinding, the residual dust, oil and other impurities on the surface are thoroughly removed, and then it is placed into the injection mold cavity. Molten plastic particles are injected into the mold cavity through an automated feeding system. The high-pressure filling process of the injection molding machine is used to fully coat the surface of the composite material profile with liquid plastic. After cooling and shaping, an integral structural part of composite material and plastic is formed. Optionally, the injection-molded particles are granulated by mixing thermoplastic resin and chopped fibers. The thermoplastic resin is PA (polyamide), PP (polypropylene), ABS (acrylonitrile-butadiene-styrene copolymer), etc., and the chopped fibers are glass fiber, basalt fiber, carbon fiber, etc. The length of the chopped fibers is generally 0.5mm-6mm, and the fiber content is 30%-60%.

[0037] With this design, the energy-absorbing component 3 is an injection-molded product with a low modulus of elasticity, which helps it to be crushed during impact, absorb collision energy, and reduce external damage to the door sill beam. The energy-absorbing component 3 and the reinforcing component 2 are integrally injection molded, eliminating physical gaps between them, improving structural integrity and load transfer efficiency, enhancing overall impact resistance, reducing processes, and allowing the entire component to be produced in a single injection molding process, shortening the production cycle and reducing equipment and labor costs.

[0038] Optionally, in some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the sill beam body 1 includes a first component 102 and a second component 103 connected to each other. The first component 102 and the second component 103 are arranged opposite each other and enclose a cavity 101. The energy-absorbing component 3 is connected to both the first component 102 and the second component 103. This arrangement allows the first component 102 and the second component 103 to form a closed cavity structure through enclosing connection (such as laser welding, riveting, or structural adhesive bonding), significantly enhancing the sill beam's bending and torsional resistance. The energy-absorbing component 3 is connected to the inner surfaces of the first component 102 and the second component 103, filling the cavity 101 and further improving the overall rigidity. Furthermore, the sill beam body 1 is manufactured in parts and then reassembled, reducing the difficulty of overall molding and improving production flexibility and processing accuracy.

[0039] Optionally, in some embodiments of this utility model, the energy-absorbing component 3 and the sill beam body 1 are bonded together using a foamed structural adhesive 4. It should be noted that the foamed structural adhesive 4 serves both a connecting and filling function, with a material density of 0.1g / cc-0.2g / cc, tensile strength > 2MPa, compressive strength > 2MPa, and water absorption rate < 0.2%. This arrangement, using the foamed structural adhesive 4 to fill the gap between the energy-absorbing component 3 and the sill beam body 1, on the one hand, ensures a stronger bond between the energy-absorbing component 3 and the sill beam body 1, avoiding problems such as electrochemical corrosion; on the other hand, after high-temperature foaming, the foamed adhesive can fill the entire connection gap, preventing water ingress due to the gap, which could lead to corrosion and abnormal noise.

[0040] Optionally, in some embodiments of this utility model, the foamed structural adhesive 4 is a strip structure, and the number of foamed structural adhesive 4 is at least two, with each foamed structural adhesive 4 spaced apart along the circumferential direction of the energy-absorbing member 3. That is, as... Figure 2 and Figure 3 As shown, within the planes containing the second and third directions, the foamed structural adhesives 4 are spaced apart around the energy-absorbing element 3. Optionally, the foamed structural adhesive 4 is at least one of epoxy foam, polyurethane foam, and polypropylene foam.

[0041] It should be noted that the amount of foamed structural adhesive 4 can be determined specifically according to actual design requirements. For example, as... Figure 2 and Figure 3 As shown, there are three sets of foamed structural adhesive 4, which are respectively set in the corner area of ​​the threshold beam body 1. This can effectively improve the impact resistance and structural sealing at the corner. At the same time, the expansion characteristics of the foamed adhesive after curing are used to fill the gaps, achieving the dual functions of mechanical support and waterproof sealing.

[0042] This setup creates a bonding system of "multi-point bonding + gap filling," which increases the contact area with the sill beam body 1 and energy-absorbing component 3. Compared with traditional continuous adhesive layers, it reduces the amount of adhesive used while ensuring bonding strength, thereby lowering material costs and meeting lightweight design requirements.

[0043] Optionally, in some embodiments of this utility model, the reinforcing member 2 is a composite pultruded profile, and the reinforcing member 2 is a hollow tubular structure. It should be noted that the composite pultruded profile is formed by high-temperature curing of fiber materials and resin materials through a pultrusion mold. The fiber materials include glass fiber, carbon fiber, basalt fiber, etc., and the resin materials include epoxy resin, polyurethane resin, PA resin, etc. The mold heating temperature is 130℃-160℃. The reinforcing member 2 is a hollow square tube shape, and its surface is wrapped with glass fiber cloth, basalt fiber cloth, or carbon fiber cloth, with a surface density of 200g / m³. 2 -400g / m 2To increase product strength, composite pultruded profiles are produced continuously with a constant cross-section, cut to the required length, and the edges are smoothed by grinding. It should be noted that the wall thickness of the composite pultruded profiles is 2mm-3mm, the fiber material is continuous fiber, and the fiber mass content is 60%-80%, preferably 55%-75%. Additionally, as... Figure 2 and Figure 3 As shown, the reinforcing member 2 can be designed as a multi-cavity structure, which provides higher strength and better energy absorption in the event of a side collision. With this design, the reinforcing member 2 is manufactured through pultrusion, resulting in high material utilization, continuous production, high efficiency, and low process cost. The hollow structure effectively improves the energy absorption effect of the door sill beam.

[0044] Optionally, in some embodiments of this utility model, the energy-absorbing component 3 is a mesh structure, specifically, the mesh structure wall thickness is 1.5mm-2mm. This configuration, employing a mesh topology design, allows for a multi-level energy-absorbing buffer mechanism to be formed through the progressive buckling and plastic deformation of the mesh units under collision conditions. This significantly improves the buffering and energy-absorbing effect of the energy-absorbing component 3, reduces the impact load transmitted to the vehicle body, and effectively ensures the structural integrity and operational safety of the power battery system during a collision.

[0045] Optionally, in some embodiments of this utility model, the material of the sill beam body 1 is metal, such as high-strength steel, aluminum alloy, magnesium alloy, titanium alloy, etc. Taking steel profiles as an example, the sill beam body 1 includes a first component 102 and a second component 103. Both the first component 102 and the second component 103 are made of steel profiles and can be formed by rolling or stamping processes, resulting in high production efficiency and suitability for mass production. After forming, the first component 102 and the second component 103 can be welded together to improve the overall structural strength. In addition, the wall thickness of the sill beam body 1 is 0.8mm-1.2mm, and the sill beam body 1 can be connected and fixed to the vehicle body structure by welding, riveting, bolting, etc. This design, with the sill beam body 1 made of metal, provides basic structural support for the sill beam, preventing excessive deformation of the sill beam during a collision and ensuring the structural integrity of the passenger compartment.

[0046] In some embodiments, the outer wall of the sill beam body 1 is covered with an anti-corrosion layer. It should be noted that the anti-corrosion treatment of the outer surface of the sill beam body 1 can be performed by electrophoresis, painting, or other methods. This design directly isolates the metal body of the sill beam from external corrosive media (such as moisture, salt spray, chemicals, etc.), extending the service life of the sill beam and reducing maintenance and replacement costs.

[0047] In conjunction with the above embodiments, this utility model provides a novel door sill beam structure, including a door sill beam body 1, a reinforcing member 2, an energy-absorbing member 3, and a foamed structural adhesive 4. Specifically, the door sill beam body 1 is made of metal and can be formed by rolling or stamping processes. The outer wall of the door sill beam body 1 is covered with an anti-corrosion layer, which can be treated with electrophoresis, painting, etc. The door sill beam body 1 is arranged along a first direction, and the interior of the door sill beam body 1 has a cavity 101. Figure 2 and Figure 3 As shown, the sill beam body 1 includes a first component 102 and a second component 103 that are arranged opposite to each other and connected to each other, and the first component 102 and the second component 103 enclose a cavity 101. A reinforcing member 2 is disposed in the cavity 101 and extends along a first direction to serve as a main load-bearing member. The reinforcing member 2 is a composite pultruded profile and has a hollow tubular structure.

[0048] In this embodiment, the energy-absorbing component 3 is arranged circumferentially around the reinforcing component 2, and is disposed between the reinforcing component 2 and the sill beam body 1. The energy-absorbing component 3 and the sill beam body 1 are bonded together by a foamed structural adhesive 4. Specifically, there are multiple energy-absorbing components 3, which are spaced apart along a first direction. Energy-absorbing components 3 are respectively provided at both ends and the middle part of the reinforcing component 2. The energy-absorbing component 3 is an injection-molded part and forms a mesh structure. The energy-absorbing component 3 and the reinforcing component 2 are integrally injection-molded. The foamed structural adhesive 4 is bonded between the energy-absorbing component 3 and the sill beam body 1 in the form of adhesive strips. There are multiple foamed structural adhesives 4, which are spaced apart along the circumferential direction of the energy-absorbing component 3. The foamed structural adhesive 4 is at least one of epoxy foam, polyurethane foam, and polypropylene foam.

[0049] This design provides the basic structural support for the sill beam body 1, made of metal material. Internally, it utilizes pultruded composite profiles and injection-molded energy-absorbing components to replace the traditional metal reinforcement structure, reducing internal metal supports and welding processes. While maintaining the overall structural strength of the sill beam, this significantly reduces its weight, increases the vehicle's driving range, and reduces carbon emissions. In the event of a side collision, it effectively absorbs impact energy, preventing severe deformation of the sill beam and ensuring vehicle safety. Furthermore, its molding process is simple, suitable for mass production, with high production efficiency, low production costs, and improved product yield.

[0050] According to an embodiment of the present invention, another aspect provides a vehicle including the sill beam structure as described in the various embodiments above. Optionally, the vehicle is a vehicle, a low-altitude aircraft, etc. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the sill beam structure described above, and therefore will not be repeated here.

[0051] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A threshold beam structure, characterized in that, include: A threshold beam body (1) is provided along a first direction, and the interior of the threshold beam body (1) has a cavity (101); A reinforcing member (2) is disposed in the cavity (101), the reinforcing member (2) extends along the first direction, and the material of the reinforcing member (2) is a composite material; An energy-absorbing component (3) is disposed in the cavity (101) and is arranged circumferentially around the reinforcing component (2). The energy-absorbing component (3) is disposed between the reinforcing component (2) and the sill beam body (1), and the energy-absorbing component (3) is connected to the sill beam body (1).

2. The sill beam structure according to claim 1, characterized in that, The number of energy-absorbing elements (3) is at least two, and each of the energy-absorbing elements (3) is spaced apart along the first direction.

3. The sill beam structure according to claim 1, characterized in that, The energy-absorbing component (3) is an injection-molded part, and / or the energy-absorbing component (3) and the reinforcing component (2) are an integral injection-molded structure.

4. The threshold beam structure according to any one of claims 1 to 3, characterized in that, The threshold beam body (1) includes a first component (102) and a second component (103) connected to each other. The first component (102) and the second component (103) are arranged opposite to each other and enclose the cavity (101). The energy-absorbing component (3) is connected to both the first component (102) and the second component (103).

5. The threshold beam structure according to any one of claims 1 to 3, characterized in that, The energy-absorbing component (3) is bonded to the sill beam body (1) by foamed structural adhesive (4).

6. The sill beam structure according to claim 5, characterized in that, The foamed structural adhesive (4) is a strip structure, and the number of foamed structural adhesives (4) is at least two, with each foamed structural adhesive (4) spaced apart along the circumference of the energy-absorbing member (3); And / or, the foamed structural adhesive (4) is at least one of epoxy foam, polyurethane foam, and polypropylene foam.

7. The threshold beam structure according to any one of claims 1 to 3, characterized in that, The reinforcing member (2) is a composite pultruded profile, and / or the reinforcing member (2) is a hollow tubular structure.

8. The threshold beam structure according to any one of claims 1 to 3, characterized in that, The energy-absorbing component (3) has a grid structure.

9. The threshold beam structure according to any one of claims 1 to 3, characterized in that, The material of the threshold beam body (1) is metal, and / or the outer wall of the threshold beam body (1) is covered with an anti-corrosion layer.

10. A vehicle, characterized in that, Includes the threshold beam structure as described in any one of claims 1 to 9.

Images