High-energy-absorption and high-safety anti-collision beam with bionic structure and vehicle

Abstract

The invention discloses a bionic-structure high-energy-absorption high-safety anti-collision beam which comprises a first beam body and a second beam body, and the first beam body and the second beam body are arranged in a spaced mode in the first direction of the anti-collision beam. The multiple cross beam walls are arranged at intervals in the second direction of the anti-collision beam, and the multiple cross beam walls are connected with the first beam body and the second beam body; the first direction is perpendicular to the second direction; the thin-wall ovoids are located between the first beam body and the second beam body in the first direction and are arranged in an adjacent mode, and the sectional areas of the thin-wall ovoids are gradually increased and expanded one by one from the first beam body to the second beam body. The energy absorption performance and safety of the anti-collision beam are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile anti-collision beams, and in particular relates to an anti-collision beam with a bionic structure, high energy absorption and high safety, and a vehicle. Background Art

[0002] The collision safety of automobiles has always been an issue of concern and research. The anti-collision beam of automobiles is of great significance to the frontal collision safety performance of the entire vehicle. The anti-collision beam can reasonably transfer and disperse the impact energy to the main force transmission path of the entire vehicle body during a collision. This requires the anti-collision beam to be able to effectively absorb energy and reduce the damage of the impact energy to the passenger compartment, and to have an efficient force transmission path to timely and effectively transfer the impact force to the vehicle body structure, thereby ensuring that the driver and passengers have enough living space.

[0003] At present, the structure of automobile anti-collision beams is generally steel stamping and welding parts, steel rolling parts, and aluminum extruded profiles, and the cross-sections are mostly in the shape of a square, a sun, and a mesh. For example, the existing patent number is CN201720358477.6, which is a front anti-collision beam assembly with a traction structure. The anti-collision beam adopts a traditional sun-shaped structure, and the test effect is limited when the collision energy absorption verification is carried out. Therefore, in order to improve the crash resistance of the anti-collision beam, it is also necessary to design a higher safety anti-collision beam to effectively reduce the probability of casualties and vehicle damage in a frontal collision. Summary of the invention

[0004] The purpose of the present invention is to solve the above technical problems and provide a bionic structure with high energy absorption and high safety anti-collision beam and vehicle, so as to improve the energy absorption and safety of the anti-collision beam. In order to achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A bionic structure, high energy absorption and high safety anti-collision beam, comprises a first beam body and a second beam body, wherein the first beam body and the second beam body are spaced apart along a first direction of the anti-collision beam; a plurality of cross beam walls, wherein the plurality of cross beam walls are spaced apart along a second direction of the anti-collision beam, and the plurality of cross beam walls are connected to the first beam body and the second beam body; the first direction and the second direction are arranged perpendicularly; a plurality of thin-walled ovoid bodies, wherein the plurality of thin-walled ovoid bodies are located between the first beam body and the second beam body and are arranged adjacent to each other along the first direction, and the plurality of thin-walled ovoid bodies are arranged to expand one by one with increasing cross-sectional areas from the first beam body to the second beam body.

[0006] The vehicle comprises the bionic structure high energy absorption and high safety anti-collision beam.

[0007] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1Schematic diagram of the anti-collision beam structure along the third direction according to an embodiment of the present invention;

[0009] Figure 2 is a schematic cross-sectional view of the anti-collision beam along a first direction in this embodiment;

[0010] Figure 3 is a schematic diagram of the dimensioning of the cross section of the anti-collision beam in this embodiment;

[0011] Figure 4 Schematic diagram of the anti-collision beam simulation model in this embodiment;

[0012] Figure 5 is the boundary condition of the collision test in this embodiment;

[0013] Figure 6 It is a top view schematic diagram of the crushing deformation of various types of anti-collision beams and energy absorption boxes in this embodiment;

[0014] Figure 7 It is a schematic side view of the crushing deformation of various types of anti-collision beams and energy absorption boxes in this embodiment;

[0015] Figure 8 Energy absorption curves of four types of anti-collision beams with different cross sections in this embodiment;

[0016] Fig. 9 A comparative table of energy absorption of four types of cross-section anti-collision beams in this embodiment;

[0017] The numbers in the figure represent:

[0018] 1 first beam body, 2 second beam body, 3 cross beam wall, 4 thin-walled oval body, 41 arc-shaped wall, 42 connecting wall, 5 connecting end, 6 transition end, 7 fixed end. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] Refer to the following Figure 1-2 The embodiment of the present invention describes a bionic structure high energy absorption and high safety anti-collision beam and a vehicle. The anti-collision beam can be a front anti-collision beam of the vehicle. The present application takes the anti-collision beam as the front anti-collision beam as an example for explanation.

[0021] like Figure 2-3As shown, the anti-collision beam according to an embodiment of the present invention includes: a first beam body 1 and a second beam body 2, the first beam body 1 and the second beam body 2 are arranged at intervals along the first direction of the anti-collision beam, a plurality of cross beam walls 3, the plurality of cross beam walls 3 are arranged at intervals along the second direction of the anti-collision beam, the plurality of cross beam walls 3 are connected to the first beam body 1 and the second beam body 2, the first direction and the second direction are arranged vertically, a plurality of thin-walled oval bodies 4, the plurality of thin-walled oval bodies 4 are located between the first beam body 1 and the second beam body 2 along the first direction and are arranged adjacent to each other, and the plurality of thin-walled oval bodies 4 are arranged to expand one by one with increasing cross-sectional areas from the first beam body 1 to the second beam body 2.

[0022] Among them, the cross-section of the anti-collision beam can adopt a closed structure, which can be formed by mold forming and extrusion technology, providing a guarantee for the cross-section forming accuracy of the anti-collision beam, thereby improving the structural stability of the anti-collision beam and further improving the energy absorption effect of the anti-collision beam.

[0023] like Figure 3 The X direction shown can be the first direction, the Z direction can be the second direction, and the first direction and the second direction are arranged perpendicularly. A plurality of beam walls 3 are arranged at intervals along the second direction, and extend along the first direction to connect the first beam body 1 and the second beam body 2. Adjacent beam walls 3 are arranged at intervals along the second direction, and a closed cavity is formed between adjacent beam walls 3 and the first beam body 1 and the second beam body 2, and each beam wall is connected to the first beam body 1 and the second beam body 2. Among them, the first direction is the main length direction of the vehicle, the second direction is the height direction of the vehicle, and the first direction and the second direction are arranged perpendicularly.

[0024] The first beam body 1 is always at the front end position of the vehicle in the direction of travel, and the second beam body 2 is always at the rear end position of the vehicle in the direction of travel; specifically, the anti-collision beam can be installed at the front periphery position of the vehicle and / or the rear periphery position of the vehicle, and the first beam body 1 can be the initial contact surface subjected to the impact force.

[0025] The first beam body 1 and the second beam body 2 are arranged at intervals along the third direction. Figure 1 The Y direction shown can be the third direction, and the first direction, the second direction, and the third direction are all arranged perpendicular to each other. Along the third direction, the first beam body 1 and / or the second beam body 2 are arranged to protrude toward the first direction, and along the third direction, the first beam body 1 and / or the second beam body 2 can be constructed as an arc structure; along the third direction, a plurality of cross beam walls 3 are consistent with the structural trajectory of the first beam body 1 and the second beam body 2, and are all connected to the first beam body 1 and the second beam body 2.

[0026] One side of the cross beam wall 3 is connected to the first beam body 1, and the other side of the cross beam wall 3 is connected to the second beam body 2. For example, the cross beam wall 3 and the first beam body 1 and the second beam body 2 can be welded, or the cross beam wall 3 and the first beam body 1 and the second beam body 2 can be bolted, but the present invention is not limited thereto. The cross beam wall 3 and the first beam body 1 and the second beam body 2 can also be connected in other ways, as long as several cross beam walls 3 are connected between the first beam body 1 and the second beam body 2. Thus, several cross beam walls 3 are connected between the first beam body 1 and the second beam body 2 to form a closed cavity structure, which can further improve the structural strength of the anti-collision beam, thereby further improving the safety performance of the vehicle.

[0027] A plurality of thin-walled ovoid bodies 4, along the first direction, the midlines of the plurality of thin-walled ovoid bodies 4 are located in the same straight line direction, the plurality of thin-walled ovoid bodies 4 are symmetrically structured along the midlines, and the plurality of thin-walled ovoid bodies 4 can be located between the first beam body 1 and the second beam body 2, for example: the plurality of thin-walled ovoid bodies 4 are located in the middle position between the first beam body 1 and the second beam body 2, or the plurality of thin-walled ovoid bodies 4 are located between the first beam body 1 and the second beam body 2 at a position closer to the first beam body 1, or between the first beam body 1 and the second beam body 2 at a position closer to the second beam body 2, but the present invention is not limited thereto, the plurality of thin-walled ovoid bodies 4 can also be located at other positions between the first beam body 1 and the second beam body 2, as long as the plurality of thin-walled ovoid bodies 4 are located between the first beam body 1 and the second beam body 2 along the first direction.

[0028] A plurality of thin-walled oval bodies 4 are arranged at intervals from the cross beam wall 3, and the plurality of thin-walled oval bodies 4 separate the closed cavities formed between the corresponding two cross beam walls 3. A plurality of cross beam walls 3 are arranged between the first beam body 1 and the second beam body 2, and the plurality of cross beam walls 3 may be two or more, and a plurality of thin-walled oval bodies 4 are arranged between two adjacent cross beam walls 3.

[0029] The two ends of a plurality of thin-walled oval bodies 4 along the first direction are respectively connected to the first beam body 1 and the second beam body 2. With such an arrangement, when the first beam body 1 is subjected to impact force, the energy can be dispersed to the plurality of thin-walled oval bodies 4 as quickly as possible, and then the energy can be dispersed to the second beam body 2, thereby improving the energy absorption effect of the anti-collision beam.

[0030] The plurality of thin-walled ovoid bodies 4 extend along the third direction and are consistent with the arrangement direction of the first beam body 1 and / or the second beam body 2. Along the third direction, the plurality of thin-walled ovoid bodies 4 connect and support the first beam body 1 and the second beam body 2, thereby improving the connection stability of the first beam body 1 and the second beam body 2.

[0031] The plurality of thin-walled oval bodies 4 can be arranged in two or more along the first direction, and the plurality of thin-walled oval bodies 4 are connected one by one from the first beam body 1 to the second beam body 2, and the cross-sectional area is continuously expanded. When the thin-walled oval body 4 close to the first beam body 1 is crushed by the impact force, the energy is transferred to the next thin-walled oval body 4, and the energy is continuously transferred to the next thin-walled oval body 4. Since the cross-sectional area of ​​the thin-walled oval body 4 is continuously expanded, the stress is effectively dispersed, and the energy is absorbed quickly to the maximum extent.

[0032] The thin-walled oval body 4 includes an arcuate wall 41 and a connecting wall 42 connecting two ends of the arcuate wall 41. The arcuate wall 41 of the thin-walled oval body 4 close to the first beam body 1 is connected to the first beam body 1, the two connecting walls 41 of the thin-walled oval body 4 close to the second beam body 2 are connected to the second beam body 2, and the two connecting walls 42 of the adjacent thin-walled oval bodies 4 are connected to the arcuate wall 41.

[0033] According to the embodiment of the present invention, the anti-collision beam with bionic structure, high energy absorption and high safety is connected to the first beam body 1 and the second beam body 2 on both sides of a plurality of cross beam walls 3, and the plurality of cross beam walls 3 are correspondingly connected to the first beam body 1 and the second beam body 2 along the third direction. The first beam body 1, the second beam body 2, and the plurality of cross beam walls 3 form a closed structure, which improves the supporting performance of the anti-collision beam, improves the connection stiffness of the anti-collision beam, and provides a stable inner cavity structure for the plurality of thin-walled oval bodies 4 therein, thereby improving the energy absorption effect of the anti-collision beam and improving the safety performance of the anti-collision beam.

[0034] According to some embodiments of the present invention, the first beam body 1 may be an arc-shaped structure, and along the third direction, the first beam body 1 is convexly arranged toward the first direction.

[0035] Specifically, the first beam body 1 can be constructed in a C-shape or a roughly C-shape. The cross-section of the first beam body 1 is a plate structure. The first beam body 1 has the characteristics of a tortoise shell-like bionic structure, which improves the energy absorption effect of the first beam body 1 as the surface subjected to impact force, thereby improving the connection strength of the anti-collision beam, and further improving the safety performance of the vehicle.

[0036] According to some embodiments of the present invention, the second beam body 2 may be an arc-shaped structure, and along the third direction, the second beam body 2 is convexly arranged toward the first direction.

[0037] The second beam body 2 can be constructed in a C-shape or substantially C-shape, and the arc tracks of the second beam body 2 and the first beam body 1 are arranged concentrically. The cross section of the second beam body 2 is a plate structure.

[0038] According to some embodiments of the present invention, along the third direction, the first beam body 1 and / or the second beam body 2 may be configured as a straight plate structure.

[0039] According to some embodiments of the present invention, one side of the cross beam wall 3 is connected to the first beam body 1 and is conformally connected to the first beam body 1, and the other side of the cross beam wall 3 is connected to the second beam body 2 and is conformally connected to the second beam body 2. When the first beam body 1 and the second beam body 2 are both arc-shaped structures, both sides of the cross beam wall 3 are also arc-shaped. When the first beam body 1 is an arc-shaped structure, when the second beam body 2 is a straight line, one side of the cross beam wall 3 is an arc-shaped connection end, and the other side of the cross beam wall 3 is a straight line connection end. A plurality of cross beam walls 3 stably support and connect the first beam body 1 and the second beam body 2, and maintain an effective conformal connection with the first beam body 1 and the second beam body 2, thereby improving the connection strength of the anti-collision beam.

[0040] According to some embodiments of the present invention, along the second direction, a plurality of beam walls 3 are relatively parallel and spaced apart, providing a stable and reliable inner cavity structure for a plurality of thin-walled ovoid bodies 4.

[0041] According to some embodiments of the present invention, a plurality of thin-walled oval bodies 4 are located in the middle position between the first beam body 1 and the second beam body 2, and the plurality of thin-walled oval bodies 4 are connected to the corresponding first beam body 1. For example, the plurality of thin-walled oval bodies 4 and the corresponding first beam body 1 may be welded, or the plurality of thin-walled oval bodies 4 and the corresponding first beam body 1 may be bolted, and the present invention is not limited thereto. The plurality of thin-walled oval bodies 4 and the corresponding first beam body 1 may also be connected in other ways, as long as the plurality of thin-walled oval bodies 4 and the corresponding first beam body 1 are connected and fixed.

[0042] According to some embodiments of the present invention, a plurality of thin-walled oval bodies 4 are located in the middle position between the first beam body 1 and the second beam body 2, and the plurality of thin-walled oval bodies 4 are connected to the corresponding second beam body 2. For example, the plurality of thin-walled oval bodies 4 and the corresponding second beam body 2 may be welded, or the plurality of thin-walled oval bodies 4 and the corresponding second beam body 2 may be bolted, and the present invention is not limited thereto. The plurality of thin-walled oval bodies 4 and the corresponding second beam body 2 may also be connected in other ways, as long as the plurality of thin-walled oval bodies 4 and the corresponding second beam body 2 are connected and fixed.

[0043] According to some embodiments of the present invention, the thin-walled oval body 4 may include an arcuate wall 41 and a connecting wall 42 connecting the two ends of the arcuate wall 41. The arcuate wall 41 may be constructed as a C-shaped structure, and the two connecting walls 42 are connected to the two ends of the arcuate wall 41, and the two connecting walls 42 are extended and arranged along the general direction of the arcuate wall 41. The connecting wall 42 and the arcuate wall 41 may be welded, or the connecting wall 42 and the arcuate wall 41 may be integrally connected and formed, but the present invention is not limited thereto, and the connecting wall 42 and the arcuate wall 41 may also be connected in other ways, as long as the connecting wall 42 and the arcuate wall 41 are connected.

[0044] According to some embodiments of the present invention, the arc-shaped wall 41 of the thin-walled oval body 4 near the first beam body 1 is connected to the first beam body 1, and the arc-shaped wall 41 of the thin-walled oval body 4 near the first beam body 1 and the first beam body 1 can be welded, or the arc-shaped wall 41 of the thin-walled oval body 4 near the first beam body 1 and the first beam body 1 are integrally connected and formed, but the present invention is not limited to this, and the arc-shaped wall 41 of the thin-walled oval body 4 near the first beam body 1 and the first beam body 1 can also be connected to the first beam body 1 in other ways, as long as the arc-shaped wall 41 of the thin-walled oval body 4 near the first beam body 1 is connected to the first beam body 1.

[0045] According to some embodiments of the present invention, the two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 are connected to the second beam body 2. The two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 and the second beam body 2 can be welded, or the two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 and the second beam body 2 are integrally connected and formed, but the present invention is not limited to this. The two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 and the second beam body 2 can also be connected to the second beam body 2 in other ways, as long as the two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 are connected to the second beam body 2.

[0046] According to some embodiments of the present invention, two connecting walls 42 of adjacent thin-walled oval bodies 4 are connected to the arcuate wall 41, and the two connecting walls 42 of the thin-walled oval body 4 with a smaller cross-sectional area are connected to the convex surface of the arcuate wall 41 of the thin-walled oval body 4 with a larger cross-sectional area. The two connecting walls 42 of one thin-walled oval body 4 and the arcuate wall 41 of another thin-walled oval body 4 can be welded, or the two connecting walls 42 of one thin-walled oval body 4 and the arcuate wall 41 of another thin-walled oval body 4 are integrally connected and formed, but the present invention is not limited to this. The two connecting walls 42 of a thin-walled oval body 4 and the arcuate wall 41 of another thin-walled oval body 4 can also be connected in other ways, as long as the two connecting walls 42 of one thin-walled oval body 4 are connected to the arcuate wall 41 of another thin-walled oval body 4.

[0047] According to some embodiments of the present invention, a connecting end 5 is provided between the arc-shaped wall 41 of the thin-walled oval body 4 close to the first beam body 1 and the first beam body 1. The connecting end 5 and the first beam body 1 and / or the arc-shaped wall 41 of the thin-walled oval body 4 can be welded, or the connecting end 5 and the first beam body 1 and / or the arc-shaped wall 41 of the thin-walled oval body 4 are integrally connected and formed, but the present invention is not limited to this, and the connecting end 5 and the arc-shaped wall 41 of the first beam body 1 or the thin-walled oval body 5 can also be connected in other ways.

[0048] According to some embodiments of the present invention, the connection end 5 is extended along the surface of the arc-shaped wall 41 of the thin-walled oval body 4 to both sides thereof. The connection end 5 increases the contact area between the arc-shaped wall 41 of the thin-walled oval body 4 and the first beam body 1. When the first beam body 1 absorbs energy by impact force, the connection end 5 can effectively receive the crushing energy and evenly transfer the energy to the arc-shaped wall of the thin-walled oval body 4, thereby improving the energy absorption effect of the arc-shaped wall 41 of the thin-walled oval body 4, thereby improving the safety performance of the anti-collision beam.

[0049] According to some embodiments of the present invention, a transition end 6 is provided between two connecting walls 42 and the arcuate wall 41 of adjacent thin-walled oval bodies 4, and the transition end 6 and the connecting wall 42 and / or the arcuate wall 41 can be welded, or the transition end 6 and the connecting wall 42 and / or the arcuate wall 41 can be integrally connected and formed, but the present invention is not limited thereto, and the transition end 6 and the connecting wall 42 and / or the arcuate wall 41 can also be connected in other ways. The transition end 6 increases the contact area between the connecting wall 42 and the arcuate wall 41, so that the connecting wall 42 and the arcuate wall 41 have a higher connection strength at the separation position of the connection, and the energy of the previous thin-walled oval body 4 at the connecting wall 42 is transferred to the arcuate wall 41 of the next thin-walled oval body 4 through the transition end 6, thereby improving the stability of energy transfer, and the energy is smoothly transferred from the previous thin-walled oval body 4 at the connecting wall 42 to the arcuate wall 41 of the next thin-walled oval body 4, thereby improving the energy absorption effect of the anti-collision beam, thereby improving the safety performance of the vehicle.

[0050] According to some embodiments of the present invention, the two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 are respectively provided with fixed ends 7 between the second beam body 2, and the fixed ends 7 are connected to the two connecting walls 42 of the thin-walled oval body 4 and / or the second beam body 2 by welding, or the fixed ends 7 are connected to the two connecting walls 42 of the thin-walled oval body 4 and / or the second beam body 2 as one piece, but the present invention is not limited thereto, and the fixed ends 7 and the two connecting walls 42 of the thin-walled oval body 4 and / or the second beam body 2 can also be connected in other ways. The fixed ends 7 increase the connection strength of the connection between the two connecting walls 42 of the thin-walled oval body 4 and the second beam body 2, and the two connecting walls 42 of the thin-walled oval body 4 can transfer the absorbed energy to the second beam body 2, thereby improving the energy absorption effect of the anti-collision beam, and thus improving the safety performance of the vehicle.

[0051] According to some embodiments of the present invention, Figure 3As shown, there are two thin-walled ovoid bodies 4 along the first direction, the midline distance between the arcuate walls 41 of the two thin-walled ovoid bodies 4 is W1, and the midline distance between the arcuate wall 41 of the thin-walled ovoid body 4 and the second beam body 2 is W2, which satisfies the relationship, W2>W1. W1=25-28mm, W2=37-40mm. For example: W1 can be a value such as 25mm or 28mm, W2 can be a value such as 37mm or 40mm, when W1 is 25mm, W2 is 40mm; when W1 is 28mm, W2 is 37mm.

[0052] According to some embodiments of the present invention, Figure 3 As shown, along the second direction, the maximum distance between the two connecting walls 42 of the thin-walled oval body 4 close to the first beam body 1 is H1, the maximum distance between the two connecting walls 42 of the thin-walled oval body 4 close to the second beam body 2 is H2, and the distance between adjacent cross beam walls 3 is H3, satisfying the relationship: H1:H3=1:2, H2:H3=0.58:1. Several thin-walled oval bodies 4 present a trend of gradually expanding cross-sectional areas along the first direction, so that when energy is transferred from the first beam body 1 to the second beam body 2, there is a gradient transition state, and several thin-walled oval bodies 4 can stably transfer energy along the force direction, thereby improving the energy absorption stability of the anti-collision beam.

[0053] According to some embodiments of the present invention, Figure 3 As shown, the minimum thickness of the connecting wall 42 of the thin-walled oval body 4 close to the first beam body 1 is T1, and the minimum thickness of the connecting wall 42 of the thin-walled oval body 4 close to the second beam body 2 is T2, satisfying the relationship: T2>T1.

[0054] According to some embodiments of the present invention, Figure 3 As shown, the thickness of the first beam body 1 along the first direction is T3, the thickness of the beam wall 3 along the second direction is T4, and the thickness of the second beam body 2 along the first direction is T5, satisfying the relationship: T3<T2<T5.

[0055] The vehicle according to the embodiment of the present invention includes the above-mentioned bionic structure high-energy absorption and high-safety anti-collision beam, which can improve the connection strength and energy absorption effect of the anti-collision beam, thereby improving the safety performance of the vehicle.

[0056] The advantages of the above anti-collision beams can be compared and analyzed through CAE. Specifically, the distance in the first direction of various anti-collision beams is 75mm, and the distance in the second direction of the anti-collision beams is 120mm. The analysis method is as follows:

[0057] 1) Select anti-collision beams with high energy absorption double bionic double oval cross-section and three contrasting cross-sections of double bionic single oval, eye-shaped, and sun-shaped. The length and width of the cross-section are consistent, and the length, curvature and other matching parts of the anti-collision beam are consistent.

[0058] 2) According to the test methods and technical requirements of C-NCAP 2018 for the whole vehicle, CAE analysis technology is used to compare and analyze the collision performance of the double-oval structure anti-collision beam compared with the other three cross-section structures under the 100% rigid wall frontal collision condition.

[0059] 3) The simulation model mainly includes: anti-collision beam assembly, car, barrier; Figure 4 shown.

[0060] 4) Boundary conditions: The front anti-collision beam assembly is fixed in front of the mobile car. The mass center information of the car is based on the mass and mass center of the original model and the weight of the dummy specified by the regulations. Figure 5 shown.

[0061] 5) Judgment criteria: a. The energy absorption box is fully deformed and crushed; b. The deformation mode is stepped from front to back; Figure 6-7 shown.

[0062] 6) Analyze the results, refer to Figure 8-9 Energy absorption of four types of impact beam cross-sections.

[0063] The above results show that the energy absorption of the anti-collision beam with a double-oval cross-section structure is 4.86KJ, the energy absorption of the anti-collision beam with a single-oval cross-section structure is 4.73KJ, the energy absorption of the anti-collision beam with a .-shaped cross-section structure is 3.93KJ, and the energy absorption of the anti-collision beam with a .-shaped cross-section structure is 3.98KJ. The total energy absorption of the anti-collision beam with a double-oval cross-section structure is equivalent to that of the single-oval structure, which is better than the total energy absorption of the .-shaped and .-shaped cross-sections, and the energy absorption ratio of the anti-collision beam with a double-oval structure is the largest. Through the design of the double bionic cross-section of the anti-collision beam, a tortoise-shell arc collision surface and an oval inner cavity structure are formed, which optimizes the force transmission path and efficiency, efficiently absorbs energy, improves the crash resistance of the anti-collision beam, and improves the frontal collision safety of the vehicle.

[0064] In the description of this specification, the description of the term "specific embodiment" 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 invention. In this specification, the schematic representation of the above terms does 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.

[0065] Although the embodiments disclosed in the present invention are as above, the contents described are only embodiments adopted to facilitate understanding of the present invention and are not intended to limit the present invention. Any technician in the field to which the present invention belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the present invention, but the patent protection scope of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. The anti-collision beam with bionic structure, high energy absorption and high safety, is characterized by: It includes a first beam body and a second beam body, the first beam body and the second beam body are arranged at intervals along the first direction of the anti-collision beam; a plurality of cross beam walls, the plurality of cross beam walls are arranged at intervals along the second direction of the anti-collision beam, and the plurality of cross beam walls are connected to the first beam body and the second beam body; the first direction and the second direction are arranged perpendicularly; a plurality of thin-walled ovoid bodies, the plurality of thin-walled ovoid bodies are located between the first beam body and the second beam body and are arranged adjacent to each other along the first direction, and the plurality of thin-walled ovoid bodies are arranged to expand one by one with increasing cross-sectional areas from the first beam body to the second beam body.

2. The bionic structure high energy absorption and high safety anti-collision beam according to claim 1 is characterized by: The adjacent cross beam walls are arranged at intervals along the second direction, and a closed cavity is formed between the adjacent cross beam walls and the first beam body and the second beam body.

3. The bionic structure high energy absorption and high safety anti-collision beam according to claim 1 is characterized by: The first beam body and the second beam body are arranged at intervals along the third direction, and the first direction, the second direction and the third direction are all perpendicular to each other.

4. The bionic structure high energy absorption and high safety anti-collision beam according to claim 3 is characterized by: Along the third direction, the first beam body and / or the second beam body is / are arranged to protrude toward the first direction.

5. The bionic structure high energy absorption and high safety anti-collision beam according to claim 4 is characterized by: Along the third direction, the first beam body and / or the second beam body is configured as an arc structure.

6. The bionic structure high energy absorption and high safety anti-collision beam according to claim 3 is characterized by: Along the third direction, the first beam body and / or the second beam body is configured as a straight plate structure.

7. The bionic structure high energy absorption and high safety anti-collision beam according to any one of claims 1 to 6, characterized in that: The plurality of cross beam walls are consistent with the structural tracks of the first beam body and the second beam body.

8. The bionic structure high energy absorption and high safety anti-collision beam according to any one of claims 1 to 6, characterized in that: Along the first direction, the midlines of the plurality of thin-walled ovoids are located in the same straight line direction.

9. The bionic structure high energy absorption and high safety anti-collision beam according to claim 8 is characterized by: Along the first direction, the plurality of thin-walled ovoid bodies are in a symmetrical structure along the midline.

10. The bionic structure high energy absorption and high safety anti-collision beam according to claim 2, characterized in that: A plurality of thin-walled ovoid bodies separate the closed cavities formed between the corresponding two beam walls.

11. The bionic structure high energy absorption and high safety anti-collision beam according to claim 3 is characterized by: The plurality of thin-walled oval bodies extend along a third direction and are consistent with an arrangement direction of the first beam body and / or the second beam body.

12. The bionic structure high energy absorption and high safety anti-collision beam according to any one of claims 1 to 6, characterized in that: The thin-walled oval body comprises an arc-shaped wall and a connecting wall connecting two ends of the arc-shaped wall.

13. The bionic structure high energy absorption and high safety anti-collision beam according to claim 12, characterized in that: The arcuate wall of the thin-walled oval body close to the first beam body is connected to the first beam body, the two connecting walls of the thin-walled oval body close to the second beam body are connected to the second beam body, and the two connecting walls of adjacent thin-walled oval bodies are connected to the arcuate wall.

14. The bionic structure high energy absorption and high safety anti-collision beam according to claim 13, characterized in that: A connecting end is arranged between the arc-shaped wall of the thin-walled oval body close to the first beam body and the first beam body.

15. The bionic structure high energy absorption and high safety anti-collision beam according to claim 14, characterized in that: The connecting end is arranged to extend along the surface of the arc-shaped wall of the thin-walled oval body toward both sides thereof.

16. The bionic structure high energy absorption and high safety anti-collision beam according to claim 13, characterized in that: A transition end is arranged between the two connecting walls and the arc-shaped wall of the adjacent thin-walled oval bodies.

17. The bionic structure high energy absorption and high safety anti-collision beam according to claim 13, characterized in that: Fixed ends are respectively arranged between the two connecting walls of the thin-walled oval body close to the second beam body and the second beam body.

18. A vehicle, characterized in that: It comprises a high-energy-absorbing and high-safety anti-collision beam with a bionic structure as described in any one of claims 1 to 17.

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