Energy absorption structure, vehicle body front end structure, vehicle body bottom assembly and vehicle

Abstract

The application provides an energy absorption structure, a front end structure of a vehicle body, a bottom assembly of a vehicle body and a vehicle. The energy absorption structure comprises a shell and a porous energy absorption piece. The shell has a plurality of side walls, the plurality of side walls surround to form an inner cavity of the shell, a plurality of partition walls are arranged in the inner cavity, adjacent partition walls are arranged in cross or interval, and the inner cavity of the shell is divided into a plurality of chambers. The porous energy absorption piece is arranged in at least one of the plurality of chambers, and the size of the pores in the porous energy absorption piece gradually decreases from the inside center of the porous energy absorption piece to the outer surface of the porous energy absorption piece. The inner pores of the porous energy absorption piece filled in the chamber are large in size and small in size, so that the inner density of the porous energy absorption piece presents a change of low inside and high outside, the energy absorption efficiency and the mechanical performance are balanced, the porous energy absorption piece is combined with the shell with a plurality of chambers, the high energy absorption capacity of the effective collision protection can be provided, and the overall weight is also reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to energy-absorbing structures, front-end vehicle structures, underbody vehicle assemblies, and vehicles. Background Technology

[0002] To improve a vehicle's crashworthiness, energy-absorbing structures are typically installed in areas of the vehicle body prone to impact. These structures absorb impact energy through deformation, reducing the impact on passengers. However, existing energy-absorbing structures, designed to meet vehicle mechanical requirements and prevent deformation during normal vehicle use, are often heavy and lack sufficient energy absorption capacity, making them increasingly unable to meet the ever-increasing crashworthiness demands of vehicles. Utility Model Content

[0003] This application provides an energy-absorbing structure, a front-end vehicle structure, a bottom vehicle assembly, and a vehicle to solve the aforementioned technical problems.

[0004] The embodiments of this application are implemented as follows:

[0005] An energy-absorbing structure includes a shell and a porous energy-absorbing element. The shell has multiple sidewalls that enclose an inner cavity forming the shell. Multiple partition walls are provided within the inner cavity, with adjacent partition walls intersecting or spaced apart, dividing the inner cavity into multiple chambers. The porous energy-absorbing element is disposed in at least one of the multiple chambers, and the pore size of the porous energy-absorbing element gradually decreases from its internal center towards its outer surface.

[0006] Thus, this application combines porous energy-absorbing components with a multi-chamber shell, providing high energy absorption capacity for effective impact protection. Furthermore, the porous energy-absorbing components allow for a reduction in the shell's thickness and weight, contributing to overall weight reduction. The porous energy-absorbing components filling the chambers have large internal pore sizes and small external pore sizes, resulting in a lower internal density and a higher external density. This balances the energy absorption efficiency and mechanical properties of the porous material, improving energy absorption while maintaining mechanical strength and reducing the weight of the energy-absorbing structure.

[0007] In one possible implementation: there are multiple porous energy absorbers, and porous energy absorbers are disposed in some of the multiple chambers.

[0008] In one possible implementation: multiple porous energy-absorbing elements are symmetrically distributed in the inner cavity with the center of the shell as the center of symmetry.

[0009] In one possible implementation: multiple porous energy-absorbing elements are symmetrically distributed in the inner cavity with the centerline of the shell as the axis of symmetry.

[0010] In one possible implementation: the number of porous energy absorbers is the same as the number of chambers, and each chamber contains one porous energy absorber.

[0011] In one possible implementation: the outer peripheral side of the porous energy absorber has a plurality of side surfaces, wherein at least one side surface is disposed adjacent to a partition wall, and / or at least one side surface is disposed adjacent to a side wall of the housing; the energy-absorbing structure further includes an adhesive component disposed between the porous energy absorber and the partition wall and / or between the porous energy absorber and the side wall of the housing.

[0012] In one possible implementation: the energy-absorbing structure further includes a beam structure having a receiving cavity, a shell disposed in the receiving cavity, and the shell being fixedly disposed relative to the beam structure.

[0013] This application also provides a front-end structure for a vehicle body, including the energy-absorbing structure and the anti-collision beam described in the above embodiments, wherein the energy-absorbing structure is connected to one side of the anti-collision beam.

[0014] This application also provides a vehicle body underbody assembly, including a frame and the energy-absorbing structure described in the above embodiments, or the vehicle body front-end structure described in the above embodiments. The energy-absorbing structure is mounted on the frame, or the vehicle body front-end structure is connected to the frame.

[0015] This application also provides a vehicle, including a body shell and the underbody assembly described in the above embodiments, the underbody assembly being disposed at the bottom of the body shell. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0018] Figure 2 This is a partial structural schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0019] Figure 3 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0021] Figure 5 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0022] Figure 6 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0023] Figure 7 This is a schematic diagram of the shell structure in an energy-absorbing structure according to an embodiment of this application.

[0024] Figure 8 This is a schematic diagram of the porous energy-absorbing element in an energy-absorbing structure according to an embodiment of this application.

[0025] Figure 9 This is a schematic diagram of the porous energy-absorbing element in an energy-absorbing structure according to an embodiment of this application.

[0026] Figure 10 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0027] Figure 11 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0028] Figure 12 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0029] Figure 13 This is a schematic diagram of the shell structure in an energy-absorbing structure according to an embodiment of this application.

[0030] Figure 14 This is a schematic diagram of the porous energy-absorbing element in an energy-absorbing structure according to an embodiment of this application.

[0031] Figure 15 This is a schematic diagram of an energy-absorbing structure according to an embodiment of this application.

[0032] Figure 16 This is a schematic diagram of the structure of a vehicle body bottom assembly according to an embodiment of this application.

[0033] Figure 17 The figures show the collision test results of an embodiment and a comparative example of the energy-absorbing structure.

[0034] Figure 18 The diagram shows the results of another collision test for an embodiment of the energy-absorbing structure and a comparative example.

[0035] Figure 19 The diagram shows the results of another collision test for an embodiment of the energy-absorbing structure and a comparative example.

[0036] Figure 20 This is a structural schematic diagram of a vehicle in one embodiment.

[0037] Explanation of key component symbols:

[0038] Energy absorption structure 100

[0039] Casing 10

[0040] Side wall 11

[0041] Inner cavity 12

[0042] Chamber 121

[0043] First chamber 121a

[0044] Second chamber 121b

[0045] Third chamber 121c

[0046] Fourth chamber 121d

[0047] Partition wall 13

[0048] Groove 14

[0049] Porous energy absorber 20

[0050] Side view 21

[0051] Adhesive component 30

[0052] Beam structure 40

[0053] Connecting part 41

[0054] Reception cavity 42

[0055] 200 front end structure of the vehicle body

[0056] 201 anti-collision beam

[0057] Connection structure 202

[0058] Body underbody assembly 300

[0059] Frame 301

[0060] Vehicle 400

[0061] Car body 401

[0062] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0063] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0064] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. When a component is said to be "set on" another component, it can be directly set on the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0066] Some embodiments of this application are described in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0067] See Figures 1 to 15 This application provides an energy-absorbing structure 100, comprising a housing 10 and a porous energy-absorbing element 20. The housing 10 has multiple sidewalls 11, which enclose an inner cavity 12. The inner cavity 12 contains multiple partition walls 13, which are arranged intersectingly or at intervals, dividing the inner cavity 12 of the housing 10 into multiple chambers 121. The porous energy-absorbing element 20 is disposed in at least one of the multiple chambers 121. From the inner center of the porous energy-absorbing element 20 towards its outer surface, the pore size of the porous energy-absorbing element 20 gradually decreases.

[0068] Thus, by combining the porous energy absorber 20 with the shell 10 of the multi-chamber 121, this application can provide high energy absorption capacity for effective collision protection. Furthermore, the thickness and weight of the shell 10 can be appropriately reduced due to the porous energy absorber 20, which helps to reduce the overall weight. The porous energy absorber 20, which fills the chamber 121, has large internal pore sizes and small external pore sizes, resulting in a change in internal density from low to high. This balances the energy absorption efficiency and mechanical properties of the porous material, improving energy absorption while ensuring mechanical strength and reducing the weight of the energy absorption structure 100.

[0069] like Figures 1 to 15As shown, in some embodiments, the housing 10 can be divided into four, three, or six chambers 121, which can be arranged in two rows or a single row, and adjacent chambers 121 share a partition wall 13. In other embodiments, the number of chambers 121 in the housing 10 can be two, five, or more other numbers, as long as the design requirements are met, and this application is not limited thereto.

[0070] In the embodiments of this application, the pore size in the porous energy absorber 20 can be the pore volume or the pore diameter measured on the cross-section of the porous energy absorber 20. As long as the measurement and design requirements are met, this application is not limited to this. In some embodiments, the material of the porous energy absorber 20 can be, but is not limited to, aluminum foam, and the material of the shell 10 can be, but is not limited to, aluminum alloy.

[0071] Because the pore size in the porous energy absorber 20 gradually decreases from the inside to the outside, the density in different regions of the porous energy absorber 20 also gradually increases from the inside to the outside. The density of the porous energy absorber 20 is 0.3-0.9 g / cm³. 3 The porosity is 60-70%, and the compressive strength is 5-22 MPa. The density of the porous energy absorber 20 can vary linearly from the inside to the outside, or it can vary in a stepwise manner. For example, in one embodiment, from the inner center of the porous energy absorber 20 towards the outer surface, the porous energy absorber 20 is sequentially divided into a first region, a second region, and a third region, and the density of the first region can be 0.3-0.5 g / cm³. 3 Any value or any range of values ​​in the range, preferably 0.4 g / cm³. 3 The compressive strength is 5-8 MPa; the density of the second region can be 0.5-0.7 g / cm³. 3 Any value or any range of values ​​in the range, preferably 0.6 g / cm³. 3 The compressive strength is 12-16 MPa; the density of the third region can be 0.7-0.9 g / cm³. 3 Any value or any range of values ​​in the range, preferably 0.8 g / cm³. 3 The compressive strength is 18-22 MPa. The area closer to the outer surface of the porous energy absorber 20 has a higher density and correspondingly better mechanical strength, so as to maintain the mechanical properties of the energy absorber structure 100 while satisfying the energy absorption effect.

[0072] In some embodiments, such as Figure 2 As shown, the porous energy absorber 20 has a plurality of side surfaces 21 on its outer periphery, wherein at least one side surface 21 is disposed adjacent to the partition wall 13, and / or at least one side surface 21 is disposed adjacent to the side wall 11 of the housing 10. Figure 1 , Figures 3 to 6As shown, in some embodiments, one side of the porous energy-absorbing member 20 may be adjacent to the side 21 of the housing 10, and the other side may be adjacent to the partition wall 13. Figures 10 to 12 As shown, in some other embodiments, the opposite sides of the porous energy absorber 20 may be adjacent to the side surface 21 of the housing 10, or to the partition wall 13, respectively. Further, the energy-absorbing structure 100 also includes an adhesive member 30, which is disposed between the porous energy absorber 20 and the partition wall 13 and / or between the porous energy absorber 20 and the side wall 11 of the housing 10.

[0073] Thus, a sandwich-like sandwich structure is formed between the porous energy-absorbing component 20 and the partition wall 13 or the side wall 11 of the shell 10. The porous energy-absorbing component 20 is fixedly integrated with the shell 10 by the adhesive component 30, combining the structural strength of aluminum alloy and the energy absorption capacity of aluminum foam. During a collision, the outer metal panel can suppress the internal porous structure and delay fracture, while the internal porous structure can also prevent the panel from wrinkling. The internal porous structure can collapse under almost constant stress, absorbing 60-80% of the total energy, providing effective protection in collision accidents.

[0074] In some embodiments, along the stacking direction of the partition wall 13, the adhesive 30, and the porous energy-absorbing component 20, the thickness of the sidewall 11 or partition wall 13 of the housing 10 is 1-2 mm, the thickness of the adhesive 30 is 0.1-0.5 mm, and the thickness of the porous energy-absorbing component 20 is 10-50 mm. By constraining the dimensions of each part, the energy absorption effect is improved, and the wall thickness of the housing 10 is reduced.

[0075] In some embodiments, the adhesive 30 may also be disposed around the outer periphery of the porous energy absorber 20 to ensure a stable connection between the porous energy absorber 20 and the inner wall of the corresponding chamber 121. The adhesive 30 may be applied to a partial area or the entire outer periphery of the energy absorber, as long as the design requirements are met, and this application is not limited thereto.

[0076] In some embodiments, the number of porous energy-absorbing elements 20 is multiple, and porous energy-absorbing elements 20 are disposed in a portion of the multiple chambers 121. Specifically, as shown in the figure Figures 1 to 5 , Figure 10 As shown, there can be two porous energy-absorbing elements 20, and the number of chambers 121 in the inner cavity 12 of the housing 10 is more than two. The porous energy-absorbing elements 20 can fill a portion of the chambers 121, while the other portion of the chambers 121 remains empty. Please refer to... Figure 13 When the number of chambers 121 in the inner cavity 12 of the housing 10 is greater than two, the number of porous energy-absorbing elements 20 can also be greater than two, as long as the design requirements are met. Please refer to Figure 11In some embodiments, the number of porous energy absorbers 20 may be one, disposed in one of the chambers 121 within the housing 10, to meet different energy absorption requirements, and to meet the condition that at least one of the multiple chambers 121 is provided with a porous energy absorber 20.

[0077] When the porous energy absorber 20 partially fills the inner cavity 12 of the shell 10, it can also fill only the impact end of the shell 10. In the cross-section of the energy-absorbing structure 100, the porous energy absorber 20 can occupy 30%-50% of the area of ​​the inner cavity 12 of the shell 10. The energy absorption mechanism is as follows: the porous energy absorber 20 breaks and absorbs the initial impact energy, reducing the peak force. During energy absorption, the porous energy absorber 20 interacts with the shell 10, stabilizing wall deformation and promoting the gradual folding of the unfilled portion. Compared to the case where the cavity 121 of the shell 10 is completely unfilled with the porous energy absorber 20, the partially filled embodiment can reduce the peak force during energy absorption and also has higher specific energy absorption (the porous energy absorber 20 adds minimal mass but improves breakage stability). This achieves the goal of optimizing overall weight and improving energy absorption performance.

[0078] In some embodiments, a plurality of porous energy-absorbing elements 20 are symmetrically distributed in the inner cavity 12 with the center of the housing 10 as the center of symmetry. For example... Figure 1 , Figure 3 As shown, there are two porous energy-absorbing elements 20, and four chambers 121 within the housing 10. The four chambers 121 are evenly distributed in a left-right, top-bottom, and bottom-up manner, with adjacent chambers 121 sharing a partition wall 13 in either the horizontal or vertical direction. Two chambers 121 with porous energy-absorbing elements 20 are diagonally adjacent to each other. In other embodiments, the number of chambers 121 can be increased, arranged in multiple rows, and the number of energy-absorbing elements can also be increased, as long as the angular symmetry distribution is satisfied. This helps to balance the force and energy absorption effect at various points of the energy-absorbing structure 100, comprehensively improving the performance of the energy-absorbing structure 100.

[0079] In some embodiments, a plurality of porous energy-absorbing elements 20 are symmetrically distributed in the inner cavity 12 about the centerline of the housing 10. For example... Figure 4 , Figure 5 , Figure 10 As shown, the porous energy-absorbing element 20 is symmetrically distributed in corresponding chambers 121 on both sides of the vertical centerline of the housing 10, with the centerline as the axis of symmetry. Adjacent chambers 121 with the porous energy-absorbing element 20 can share a partition wall 13, or they can be separated by empty chambers 121. Figure 11 As shown, the porous energy-absorbing element 20 can also be disposed in the chamber 121 through which the centerline of the housing 10 passes in the vertical direction. In this way, the energy absorption requirements under different conditions can be met.

[0080] In some embodiments, such as Figure 6 , Figure 12 and Figure 14 As shown, the number of porous energy-absorbing elements 20 is the same as the number of chambers 121, and each chamber 121 is provided with one porous energy-absorbing element 20. In this way, the inner cavity 12 of the shell 10 is filled with porous energy-absorbing elements 20 on the one hand, and the partitioning is also achieved on the other hand, which is conducive to improving the overall energy absorption effect.

[0081] When the porous energy absorber 20 completely fills the inner cavity 12 of the shell 10, the energy absorption mechanism is as follows: when the porous energy absorber 20 is crushed under pressure, the shell 10 wrinkles. The porous energy absorber 20 provides lateral support to prevent instability of the side walls 11 or partition walls 13 of the shell 10. Although complete filling will increase the overall structural mass to some extent compared to partial filling, the energy absorption effect can also be further improved.

[0082] Please see Figures 1 to 12 , Figure 16 In some embodiments, the energy-absorbing structure 100 can be configured as an energy-absorbing box structure, with the housing 10 serving as the outer shell of the energy-absorbing box and connected to the collision beam at the front of the vehicle 400. The energy-absorbing box is used to absorb energy when the collision beam bears a load, thereby reducing injury to passengers inside the vehicle 400.

[0083] Please see Figures 17 to 19 This demonstrates an embodiment of the energy-absorbing structure 100 as an energy-absorbing box, along with comparative collision test results. Please refer again. Figures 1 to 6 In the test embodiment, the housing 10 is generally configured as a cuboid structure with four chambers 121. The chamber 121 in the upper left corner is defined as the first chamber 121a, the chamber 121 in the upper right corner is defined as the second chamber 121b, the chamber 121 in the lower left corner is defined as the third chamber 121c, and the chamber 121 in the lower right corner is defined as the fourth chamber 121d. Figure 1 The diagram can represent a cross-sectional view of the energy-absorbing box in Embodiment 1, wherein the second chamber 121b and the third chamber 121c are filled with porous energy-absorbing elements 20, while the first chamber 121a and the fourth chamber 121d are empty. Figure 3 The diagram can represent a cross-sectional view of the energy-absorbing box in Embodiment 2, wherein the first chamber 121a and the fourth chamber 121d are filled with porous energy-absorbing elements 20, while the second chamber 121b and the third chamber 121c are empty. Figure 4 The diagram can represent a cross-sectional view of the energy-absorbing box in Embodiment 3, wherein the first chamber 121a and the second chamber 121b are filled with porous energy-absorbing elements 20, and the third chamber 121c and the fourth chamber 121d are empty. Figure 5 The diagram can represent a cross-sectional view of the energy-absorbing box in Embodiment 4, wherein the first chamber 121a and the second chamber 121b are empty, and the third chamber 121c and the fourth chamber 121d are filled with porous energy-absorbing elements 20. Figure 6The diagram shows a cross-sectional view of the energy-absorbing box in Embodiment 5, where each chamber 121 is filled with a porous energy-absorbing element 20. A comparative example is a case where the housing 10 has four empty chambers 121, without being filled with porous energy-absorbing elements 20. See [reference needed] for further details. Figure 7 The shell structure 10.

[0084] from Figure 17 As can be seen from the collision simulation test diagram, under the same collision conditions, the deformation of the energy-absorbing box filled with porous energy-absorbing material is less than that of the control group, proving that the energy absorption capacity of the energy-absorbing box filled with porous energy-absorbing material is improved.

[0085] Figure 18 The diagrams show the deformation of the energy-absorbing box at different angles after simulated collisions in comparative examples and embodiments 1-5. Figure 19 The figures show the stress change curves of the energy-absorbing boxes in the comparative and embodiment examples during the collision process. A comprehensive comparison of the test results shows that in the comparative example, the shell 10 lacks porous energy-absorbing material, resulting in unstable asymmetric folding at the impact end, rapidly progressing to bending, and buckling leading to early structural collapse. Energy absorption during the collapse process is limited. In Embodiment 1, the porous energy-absorbing component 20 partially fills the inner cavity 12 of the shell 10, leading to asymmetric buckling and collapse due to stress concentration. During the collapse process, the energy absorption effect is significantly improved compared to the comparative example. Embodiment 2 is similar to Embodiment 1; during the collapse process, the energy absorption effect is significantly improved compared to the comparative example. The porous energy-absorbing component 20 can stabilize the corresponding wall panel, allowing the energy-absorbing box to gradually bend. In Embodiment 3, the porous energy-absorbing components 20 in the first chamber 121a and the second chamber 121b absorb energy and limit deformation, while the buckling deformation in the third chamber 121c and the fourth chamber 121d is minimal. In Embodiment 4, the hollow portion deforms, and the later deformation resistance of the filled portion leads to incomplete compaction. The energy absorption effect is still significantly improved compared to the comparative example. In Example 5, the porous energy absorber 20 dominates energy absorption during breakage, and the energy absorption effect is significantly improved compared to the comparative example during the collapse process. In summary, Examples 1 and 2 perform better in terms of impact end control. When the porous energy absorber 20 partially fills the inner cavity 12 of the shell 10, the porous energy absorber 20 can control the folding and collapse process of the energy-absorbing box. The porous energy absorber 20 transfers stress to the hollow chamber 121 through the partition wall 13, and absorbs the residual energy during compression. The partial filling method also minimizes the structural weight of the energy-absorbing box.

[0086] In some embodiments, such as Figure 13 , Figure 14 and Figure 15As shown, the energy-absorbing structure 100 also includes a beam structure 40, which has a receiving cavity 42. The housing 10 is disposed in the receiving cavity 42 and is fixedly disposed relative to the beam structure 40. Thus, the energy-absorbing structure 100 can be configured as a sill beam, body crossbeam, longitudinal beam, or other structure of the vehicle 400, and can be installed at various locations on the vehicle body to meet various collision protection requirements.

[0087] exist Figure 13 and Figure 14 In the illustrated embodiment, six chambers 121 can be provided within the housing 10, arranged in two rows, with six porous energy-absorbing elements 20 filling each chamber 121 respectively. Figure 15 In the illustrated embodiment, the porous energy absorber 20 may also partially fill the housing 10, and the porous energy absorber 20 is symmetrically arranged in the chambers 121 on both sides of the transverse centerline of the housing 10. In other embodiments, the number of chambers 12 inside the housing 10 may be more or less than six, and the porous energy absorber 20 may be arranged according to the need for partial or complete filling; this application is not limited thereto. The beam structure 40 includes, but is not limited to, I-beams to improve manufacturing versatility.

[0088] Please refer to it again. Figure 15 In some embodiments, the receiving cavity 42 of the beam structure 40 is further provided with a connecting part 41 for connecting the housing 10 and the beam structure 40 to fix the installation position of the housing 10 in the receiving cavity 42. In other embodiments, the housing 10 may also be directly connected to the inner wall of the beam structure 40.

[0089] Please see Figure 16 The embodiments of this application also provide a front end structure 200 of a vehicle body, including the energy-absorbing structure 100 and the anti-collision beam 201 described in the above embodiments, wherein the energy-absorbing structure 100 is connected to one side of the anti-collision beam 201.

[0090] In one embodiment, the energy-absorbing structure 100 can be an energy-absorbing box connected to the side of the crash beam 201 away from the collision target, to absorb energy transmitted from the crash beam 201. See also... Figure 7 The energy-absorbing structure 100 can also have a groove 14 at one end of its housing 10, and the anti-collision beam 201 can be partially set in the groove 14 to assemble the energy-absorbing structure 100 and the anti-collision beam 201, which helps to improve the connection reliability and reduce the installation difficulty.

[0091] In other embodiments, the energy-absorbing structure 100 may also be configured as a collision beam that is arranged parallel to and connected to the anti-collision beam 201 along the height direction of the vehicle 400, so as to directly contact the collision target and absorb the collision energy.

[0092] Please see Figure 16This application also provides a vehicle body bottom assembly 300, including a frame 301 and the energy-absorbing structure 100 described in the above embodiments, or the vehicle body front end structure 200 described in the above embodiments. The energy-absorbing structure 100 is mounted on the frame 301, or the vehicle body front end structure 200 is connected to the frame 301.

[0093] In some embodiments, the energy-absorbing structure 100 may serve as a door sill beam, disposed on both sides of the frame 301 along the width direction of the vehicle 400, to absorb energy during a side collision. In other embodiments, the energy-absorbing structure 100 may also be disposed in other crossbeams and longitudinal beams of the frame 301, as long as the collision protection requirements are met; this application is not limited thereto.

[0094] In some instances, the front-end structure 200 may further include a connecting structure 202 to connect the energy-absorbing structure 100, which serves as an energy-absorbing box, to the frame 301. In other embodiments, the energy-absorbing structure 100 in the front-end structure 200 may also be directly connected to the frame 301, and this application is not limited thereto.

[0095] Please see Figure 20 This application also provides a vehicle 400, including a body shell 401 and a body bottom assembly 300 as described in the above embodiments, wherein the body bottom assembly 300 is disposed at the bottom of the body shell 401.

[0096] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the above preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of this application should not depart from the spirit and scope of the technical solutions of this application.

Claims

1. An energy-absorbing structure, characterized in that, include: The shell has multiple sidewalls, which surround and form an inner cavity of the shell. Multiple partition walls are provided in the inner cavity, and adjacent partition walls are arranged intersecting or spaced apart to divide the inner cavity of the shell into multiple chambers. A porous energy absorber is disposed in at least one of the plurality of chambers, and the pore size in the porous energy absorber gradually decreases from the inner center of the porous energy absorber toward the outer surface of the porous energy absorber.

2. The energy-absorbing structure according to claim 1, characterized in that: The number of porous energy-absorbing elements is multiple, and the porous energy-absorbing elements are disposed in some of the multiple chambers.

3. The energy-absorbing structure according to claim 2, characterized in that: Multiple porous energy-absorbing elements are symmetrically distributed in the inner cavity with the center of the shell as the center of symmetry.

4. The energy-absorbing structure according to claim 2, characterized in that: Multiple porous energy-absorbing elements are symmetrically distributed in the inner cavity with the centerline of the shell as the axis of symmetry.

5. The energy-absorbing structure according to claim 1, characterized in that: The number of porous energy-absorbing elements is the same as the number of chambers, and each chamber is provided with one porous energy-absorbing element.

6. The energy-absorbing structure according to claim 1, characterized in that: The porous energy absorber has multiple side surfaces on its outer periphery, wherein at least one side surface is adjacent to the partition wall, and / or at least one side surface is adjacent to the side wall of the housing. The energy-absorbing structure further includes an adhesive component, which is disposed between the porous energy-absorbing component and the partition wall and / or between the porous energy-absorbing component and the side wall of the housing.

7. The energy-absorbing structure according to any one of claims 1-6, characterized in that: It also includes a beam structure having a receiving cavity, the housing being disposed in the receiving cavity, and the housing being fixedly disposed relative to the beam structure.

8. A front-end structure for a vehicle body, characterized in that, include: The energy-absorbing structure according to any one of claims 1-7; A crash beam, wherein the energy-absorbing structure is connected to one side of the crash beam.

9. A vehicle body underbody assembly, characterized in that, include: Frame; The energy-absorbing structure according to any one of claims 1-7, wherein the energy-absorbing structure is mounted on the vehicle frame; Alternatively, the vehicle front end structure as described in claim 8, wherein the vehicle front end structure is connected to the vehicle frame.

10. A vehicle, characterized in that, include: Car body; The vehicle body bottom assembly of claim 9, wherein the vehicle body bottom assembly is disposed at the bottom of the vehicle body.

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