Chiral modular self-locking energy absorption system

Abstract

The invention discloses a chiral modular self-locking energy absorption system which is formed by splicing a plurality of energy absorption pipes with blades, each blade comprises a first protruding part located at the end and a second protruding part connected with the first protruding part, the second protruding part is connected with the root of the adjacent blade to form a concave part, and when the energy absorption pipes are spliced, the second protruding part is connected with the root of the adjacent blade to form the concave part. The first protruding parts are inserted into the concave parts of the adjacent energy absorption pipes, the blades are distributed in the circumferential direction of the energy absorption pipes, the concave parts are also distributed in the circumferential direction of the energy absorption pipes, and the directions of restraining the energy absorption pipes through cooperation formed by cooperation of the first protruding parts and the concave parts in each pair are different. Therefore, each energy-absorbing tube in the chiral modularized self-locking energy-absorbing system is restrained in each direction on the plane where the energy-absorbing tube is located in the radial direction, self-locking is formed, and the chiral modularized self-locking energy-absorbing system can keep good self-locking stability when coping with impact loads in various directions.

Description

Technical Field

[0001] The present invention relates to the technical field of energy absorption systems, and in particular to a chiral modular self-locking energy absorption system. Background Art

[0002] Collision accidents are common in various fields such as transportation, civil engineering, mechanical engineering and petroleum engineering. Impact loads not only threaten the safety of human life and property, but also may cause ecological damage and pose a major safety hazard. Energy-absorbing structures are key protective devices against impact loads, and usually absorb most of the impact energy through plastic deformation.

[0003] For traditional circular tube energy absorption structures, splashing will occur when facing impact without external constraints, greatly reducing the energy absorption efficiency of the structure. In related technologies, most self-locking energy absorption systems can only maintain self-locking stability when dealing with impact loads in a specific direction, and cannot fully cope with complex impact loads in actual production. Therefore, there is an urgent need for an energy absorption structure that can maintain good self-locking stability when dealing with impact loads in various directions. Summary of the invention

[0004] The present invention provides a chiral modular self-locking energy absorption system, which improves the problem in the prior art that the energy absorption structure can only maintain self-locking stability when coping with impact loads in a specific direction. The system can maintain good self-locking stability when coping with impact loads in various directions.

[0005] To achieve the above object, the present invention provides a chiral modular self-locking energy absorption system, comprising a plurality of energy absorption tubes, wherein the energy absorption tubes are provided with a plurality of blades along the circumferential direction, and the blades include:

[0006] a first protrusion, wherein the first protrusion is arranged at an end of the blade;

[0007] A second protrusion, wherein the second protrusion is connected to the first protrusion, an extension direction of the second protrusion intersects with an extension direction of the first protrusion, and a plurality of the second protrusions on the same energy absorbing tube are arranged in the same direction along the circumference of the energy absorbing tube;

[0008] Wherein, the second protrusion is connected to the root of the adjacent blade of the same energy absorbing tube to form a recessed portion, and the recessed portion is used to cooperate with the first protrusion of the adjacent energy absorbing tube. In practice, a plurality of the energy absorbing tubes are spliced ​​together to form the chiral modular self-locking energy absorbing system, and the first protrusion is inserted into the recessed portion of the adjacent energy absorbing tube. Since the blades are distributed along the circumference of the energy absorbing tube, the recessed portion is also distributed along the circumference of the energy absorbing tube. The cooperation formed by each pair of the first protrusion and the recessed portion constrains the energy absorbing tube in a different direction, so that each energy absorbing tube in the chiral modular self-locking energy absorbing system is constrained in all directions on the radial plane to form self-locking, so that the chiral modular self-locking energy absorbing system can maintain good self-locking stability when dealing with impact loads in various directions.

[0009] As an optional technical solution, the outer wall of the energy absorbing tube is bent to form the blade, and the bend is an arc transition. Since the blade is formed by bending the outer wall of the energy absorbing tube, and the energy absorbing tube does not have other complex closed structures, the energy absorbing tube can be stamped from ordinary round tubes, square tubes or polygonal tubes. In addition, the arc transition at the bend makes the energy absorbing tube have better structural processability, which is beneficial to reduce the manufacturing cost of the energy absorbing tube and the chiral modular self-locking energy absorption system, and improve the production efficiency of the energy absorbing tube and the chiral modular self-locking energy absorption system. In addition, the energy absorbing tube can be manufactured, transported and stored separately. When in use, multiple energy absorbing tubes can be spliced ​​and assembled as needed to form the chiral modular self-locking energy absorption system. It is easy to operate and flexible to use.

[0010] As an optional technical solution, the depth h1 of the recessed portion is the same as the length h2 of the first protruding portion, and the width w1 of the recessed portion is the same as the width w2 of the first protruding portion. Based on this, the first protruding portion and the recessed portion can achieve a more stable matching effect, thereby improving the stability of the constraint between the two adjacent energy absorbing tubes, and further improving the energy absorption effect of the chiral modular self-locking energy absorption system.

[0011] As an optional technical solution, the number of the blades is three, and the three blades are evenly arranged along the circumference of the energy absorbing tube. The even distribution of the three blades can reduce the gap between the energy absorbing tubes, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0012] As an optional technical solution, the depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

[0013] As an optional technical solution, the number of the blades is four, and the four blades are evenly arranged along the circumference of the energy absorbing tube. The even distribution of the four blades can reduce the gap between the energy absorbing tubes, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0014] As an optional technical solution, the depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

[0015] As an optional technical solution, the number of the blades is six, and the six blades are evenly arranged along the circumference of the energy absorbing tube. The even distribution of the blades can reduce the gaps between the energy absorbing tubes, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0016] As an optional technical solution, the depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

[0017] As an optional technical solution, the angle between the extension direction of the first protrusion and the extension direction of the second protrusion on the same blade satisfies 360° / n, where n is the number of blades on the same energy absorbing tube. The chiral modular self-locking energy absorbing system of this technical solution achieves a dense paving effect of the energy absorbing tubes in the cross section along the axial direction of the energy absorbing tubes, can reduce the gaps between the energy absorbing tubes, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorbing system. And the self-locking energy absorbing mechanism can be infinitely expanded within the axial cross section of the energy absorbing tube, and the number of the energy absorbing tubes required for each layer and each column can be flexibly adjusted according to actual conditions.

[0018] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0019] 1. The chiral modular self-locking energy absorbing system of the present invention is formed by splicing a plurality of energy absorbing tubes with blades, wherein the blades include a first protrusion located at the end and a second protrusion connected to the first protrusion, and the second protrusion is connected to the root of an adjacent blade to form a recessed portion. When the plurality of energy absorbing tubes are spliced ​​together, the first protrusion is inserted into the recessed portion of the adjacent energy absorbing tube. Since the blades are distributed along the circumference of the energy absorbing tube, the recessed portion is also distributed along the circumference of the energy absorbing tube. The direction of the energy absorbing tube constrained by the cooperation formed by each pair of the first protrusion and the recessed portion is different, so that each energy absorbing tube in the chiral modular self-locking energy absorbing system is constrained in each direction on the plane where the radial direction is located, forming self-locking, so that the chiral modular self-locking energy absorbing system can maintain good self-locking stability when dealing with impact loads in various directions;

[0020] 2. The energy absorbing tube of the present invention can be produced by traditional manufacturing technology such as stamping process. When in use, multiple energy absorbing tubes are spliced ​​and assembled to form a chiral modular self-locking energy absorbing system. The manufacturing process is mature and the production efficiency is high, which is conducive to reducing production costs;

[0021] 3. The chiral modular self-locking energy absorption system of the present invention can flexibly adjust the size and number of energy absorption tubes according to response requirements to meet actual needs, and has high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation on the embodiments of the present invention;

[0023] Figure 1 A schematic diagram of a chiral modular self-locking energy absorption system in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 A cross-sectional view of the middle energy absorbing tube along the axial direction;

[0025] Figure 3 for Figure 1 Schematic diagram of various dimensions of the energy absorbing tube;

[0026] Figure 4 for Figure 1 The displacement energy curve of the chiral modular self-locking energy absorption system under the first impact condition;

[0027] Figure 5 for Figure 1 The displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition;

[0028] Figure 6 A schematic diagram of a chiral modular self-locking energy absorption system in another embodiment of the present invention;

[0029] Figure 7for Figure 6 A cross-sectional view of the middle energy absorbing tube along the axial direction;

[0030] Figure 8 for Figure 6 Schematic diagram of various dimensions of the energy absorbing tube;

[0031] Fig. 9 for Figure 6 The displacement energy curve of the chiral modular self-locking energy absorption system under the first impact condition;

[0032] Fig.10 for Figure 6 The displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition;

[0033] Fig.11 A schematic diagram of a chiral modular self-locking energy absorption system in another embodiment of the present invention;

[0034] Fig.12 for Fig.11 A cross-sectional view of the middle energy absorbing tube along the axial direction;

[0035] Fig.13 for Fig.11 Schematic diagram of various dimensions of the energy absorbing tube;

[0036] Fig.14 for Fig.11 The displacement energy curve of the chiral modular self-locking energy absorption system under the first impact condition;

[0037] Fig.15 for Fig.11 Displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition.

[0038] Among them, energy absorbing tube-1; blade-11; first protruding portion-111; second protruding portion-112; recessed portion-12. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In the present invention, the directions or positional relationships indicated by the terms "upper" and "outer" are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0041] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0044] Collision accidents are common in various fields such as transportation, civil engineering, mechanical engineering and petroleum engineering. Impact loads not only threaten the safety of human life and property, but also may cause ecological damage and pose a major safety hazard. Energy absorbing structures are key protective devices against impact loads, and usually absorb most of the impact energy through plastic deformation.

[0045] Some energy-absorbing structures in related technologies use metal-based mechanical metamaterials, which usually have complex artificially designed cellular structures and need to be produced in one piece through additive manufacturing (also known as 3D printing). Although additive manufacturing technology has made great progress in recent years, the internal defects, rough surfaces, microstructural unevenness and residual stresses generated during the processing of additively manufactured metal parts will significantly reduce the fatigue performance of the structure. Moreover, the technical maturity of additive manufacturing is still not comparable to traditional manufacturing, the application range is narrow, the industry scale is small, and the manufacturing cost is still much higher than traditional manufacturing. Therefore, how to manufacture metal-based energy-absorbing structures with reliable performance at low cost remains a challenge. In addition, the one-piece structure is not flexible enough in responding to demand.

[0046] For traditional circular tube energy absorption structures, splashing will occur when facing impact without external constraints, greatly reducing the energy absorption efficiency of the structure. In addition, most existing self-locking energy absorption systems can only maintain self-locking stability when dealing with impact loads in a specific direction, or have complex configurations and high costs, special cross-sectional shapes, inconvenient disassembly and assembly, unstable energy absorption, etc., which restricts the application and promotion of such energy absorption systems. Therefore, there is an urgent engineering need to develop modular energy absorption structures with low production costs, flexible response to needs, and stable energy absorption.

[0047] Based on this, the present invention provides a chiral modular self-locking energy absorption system, which is formed by splicing multiple energy absorbing tubes with blades, wherein the blades include a first protrusion located at the end and a second protrusion connected to the first protrusion, and the second protrusion is connected to the root of an adjacent blade to form a recessed portion. When the multiple energy absorbing tubes are spliced ​​together, the first protrusion is inserted into the recessed portion of the adjacent energy absorbing tube. Since the blades are distributed along the circumference of the energy absorbing tube, the recessed portion is also distributed along the circumference of the energy absorbing tube. The cooperation formed by each pair of first protrusions and recessed portions constrains the energy absorbing tube in a different direction, so that each energy absorbing tube in the chiral modular self-locking energy absorption system is constrained in all directions on the radial plane to form self-locking, so that the chiral modular self-locking energy absorption system can maintain good self-locking stability when dealing with impact loads in various directions.

[0048] The technical solution of the present invention will be described in detail below in conjunction with embodiments and drawings.

[0049] Embodiment 1

[0050] The present invention provides a chiral modular self-locking energy absorption system, comprising a plurality of energy absorption tubes 1, wherein the energy absorption tubes 1 are provided with a plurality of blades 11 along the circumferential direction, and the blades 11 include a first protrusion 111 and a second protrusion 112. The first protrusion 111 is arranged at the end of the blade 11. The second protrusion 112 is connected to the first protrusion 111, and the extension direction of the second protrusion 112 intersects with the extension direction of the first protrusion 111. The plurality of second protrusions 112 on the same energy absorption tube 1 are arranged in the same direction along the circumferential direction of the energy absorption tube 1.

[0051] The second protruding portion 112 is connected to the root of the adjacent blade 11 of the same energy absorbing tube 1 to form a recessed portion 12 , and the recessed portion 12 is used to cooperate with the first protruding portion 111 of the adjacent energy absorbing tube 1 .

[0052] In practice, multiple energy absorbing tubes 1 are spliced ​​together to form a chiral modular self-locking energy absorbing system. The first protrusion 111 is inserted into the recessed portion 12 of the adjacent energy absorbing tube 1. Since the blades 11 are distributed along the circumference of the energy absorbing tube 1, the recessed portion 12 is also distributed along the circumference of the energy absorbing tube 1. The cooperation formed by each pair of first protrusions 111 and recessed portions 12 constrains the energy absorbing tube 1 in different directions, so that each energy absorbing tube 1 in the chiral modular self-locking energy absorbing system is constrained in all directions on the radial plane to form self-locking, so that the chiral modular self-locking energy absorbing system can maintain good self-locking stability when dealing with impact loads in various directions.

[0053] Embodiment 2

[0054] On the basis of the first embodiment, the outer wall of the energy absorbing tube 1 is bent to form the blade 11, and the bend is an arc transition. Since the blade 11 is formed by bending the outer wall of the energy absorbing tube 1, and the energy absorbing tube 1 does not have other complex closed structures, the energy absorbing tube 1 can be stamped from ordinary round tubes, square tubes or polygonal tubes. In addition, the arc transition at the bend makes the energy absorbing tube 1 have better structural processability, which is conducive to reducing the manufacturing cost of the energy absorbing tube 1 and the chiral modular self-locking energy absorption system, and improving the production efficiency of the energy absorbing tube 1 and the chiral modular self-locking energy absorption system. In addition, the energy absorbing tube 1 can be manufactured, transported and stored separately. When in use, multiple energy absorbing tubes 1 can be spliced ​​and assembled as needed to form a chiral modular self-locking energy absorption system, which is easy to operate and flexible to use.

[0055] As an optional embodiment, the depth h1 of the recessed portion 12 is the same as the length h2 of the first protruding portion 111, and the width w1 of the recessed portion 12 is the same as the width w2 of the first protruding portion 111. Based on this, the first protruding portion 111 and the recessed portion 12 can achieve a relatively stable matching effect, thereby improving the stability of the constraint between the two adjacent energy absorbing tubes 1, and further improving the energy absorption effect of the chiral modular self-locking energy absorption system.

[0056] Embodiment 3

[0057] like Figures 1 to 3 As shown, based on the first or second embodiment, the number of blades 11 is three, and the three blades 11 are evenly arranged along the circumference of the energy absorbing tube 1. The even distribution of the three blades 11 can reduce the gaps between the energy absorbing tubes 1, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0058] As an optional embodiment, the depth h1 of the recessed portion 12, the length h2 of the first protruding portion 111, and the wall thickness t of the energy absorbing tube 1 satisfy Wherein L is the maximum distance between the two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction of the energy absorbing tube 1. Wherein the depth h1 of the recessed portion 12 refers to the vertical distance between the bottom of the recessed portion 12 and the top of the adjacent second protrusion 112, and the length h2 of the first protrusion 111 refers to the distance between the end of the first protrusion 111 and the connected second protrusion 112 along the extension direction of the blade 11.

[0059] Exemplarily, the energy absorbing tube 1 adopts the following parameters: L = 28mm, t = 1mm, h1 = h2 = 5mm, w1 = w2 = 7mm, r = 2mm, T = 80mm, where r is the radius of the arc transition at the bend of the outer wall of the energy absorbing tube 1, and T is the length of the energy absorbing tube 1. Several energy absorbing tubes 1 are assembled to form a chiral modular self-locking energy absorption system. Set the first impact condition: impact speed v = 72km / h = 20m / s, impact mass m = 133kg, and calculate the theoretical impact energy E = 1 / 2mv 2 =1 / 2×133×20 2 J = 2.66 × 10 4 J. The displacement energy curve of the chiral modular self-locking energy absorption system under the first impact condition is shown in Figure 4 As shown, the maximum energy absorbed is E max =2.629×10 4 J, absorbing 98.83% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 2190J compared with the prior art (CN110263454A), and the total amount of energy absorbed is greatly improved.

[0060] Set the second impact condition: impact speed v = 50km / h = 13.89m / s, impact mass m = 150kg, calculate the theoretical impact energy E = 1 / 2mv 2 =1 / 2×150×13.89 2 J = 1.447 × 10 4 J. The displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition is shown in Figure 5 As shown, the maximum energy absorbed is E max =1.443×10 4 J, absorbing 99.72% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 800J compared with the prior art (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0061] Embodiment 4

[0062] like Figures 6 to 8As shown, based on the first or second embodiment, the number of blades 11 is four, and the four blades 11 are evenly arranged along the circumference of the energy absorbing tube 1. The even distribution of the four blades 11 can reduce the gaps between the energy absorbing tubes 1, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0063] As an optional embodiment, the depth h1 of the recessed portion 12, the length h2 of the first protruding portion 111, and the wall thickness t of the energy absorbing tube 1 satisfy Wherein L is the maximum distance between the two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction of the energy absorbing tube 1. Wherein the depth h1 of the recessed portion 12 refers to the vertical distance between the bottom of the recessed portion 12 and the top of the adjacent second protrusion 112, and the length h2 of the first protrusion 111 refers to the distance between the end of the first protrusion 111 and the connected second protrusion 112 along the extension direction of the blade 11.

[0064] For example, the energy absorbing tube 1 adopts the following parameters: L = 28mm, t = 1mm, h1 = h2 = 9.3mm, w1 = w2 = 7mm, r = 2mm, T = 80mm. Among them, r is the radius of the arc transition at the bend of the outer wall of the energy absorbing tube 1, and T is the length of the energy absorbing tube 1. Several energy absorbing tubes 1 are assembled to form a chiral modular self-locking energy absorbing system. The displacement energy curve of the chiral modular self-locking energy absorbing system under the first impact condition is shown in Fig. 9 As shown, the maximum energy absorbed is E max =2.596×10 4 J, absorbing 97.59% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 1860J compared with the prior art (CN110263454A), and the total amount of energy absorbed is greatly improved.

[0065] The displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition is shown in Fig.10 As shown, the maximum energy absorbed is E max =1.437×10 4 J, absorbing 99.31% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 740J compared with the prior art (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0066] Embodiment 5

[0067] like Figures 11 to 13 As shown, based on the first or second embodiment, the number of blades 11 is six, and the six blades 11 are evenly arranged along the circumference of the energy absorbing tube 1. The even distribution of the blades 11 can reduce the gaps between the energy absorbing tubes 1, and can cause more structures to undergo plastic deformation when subjected to impact loads, thereby improving the energy absorption capacity of the chiral modular self-locking energy absorption system.

[0068] As an optional embodiment, the depth h1 of the recessed portion 12, the length h2 of the first protruding portion 111, and the wall thickness t of the energy absorbing tube 1 satisfy Wherein L is the maximum distance between the two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction of the energy absorbing tube 1. Wherein the depth h1 of the recessed portion 12 refers to the vertical distance between the bottom of the recessed portion 12 and the top of the adjacent second protrusion 112, and the length h2 of the first protrusion 111 refers to the distance between the end of the first protrusion 111 and the connected second protrusion 112 along the extension direction of the blade 11.

[0069] For example, the energy absorbing tube 1 adopts the following parameters: L = 28mm, t = 1mm, h1 = h2 = 12mm, w1 = w2 = 7mm, r = 2mm, T = 80mm. Among them, r is the radius of the arc transition at the bend of the outer wall of the energy absorbing tube 1, and T is the length of the energy absorbing tube 1. Several energy absorbing tubes 1 are assembled to form a chiral modular self-locking energy absorbing system. The displacement energy curve of the chiral modular self-locking energy absorbing system under the first impact condition is shown in Fig.14 As shown, the maximum energy absorbed is E max =2.621×10 4 J, absorbing 98.53% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 2110J compared with the prior art (CN110263454A), and the total amount of energy absorbed is greatly improved.

[0070] The displacement energy curve of the chiral modular self-locking energy absorption system under the second impact condition is shown in Fig.15 As shown in the figure, the maximum energy absorbed is E max =1.444×10 4 J, absorbing 99.79% of the total impact energy. Under the same impact conditions, the total absorbed energy is increased by 810J compared with the prior art (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0071] Embodiment 6

[0072] On the basis of the third embodiment, the fourth embodiment or the fifth embodiment, the angle between the extension direction of the first protrusion 111 and the extension direction of the second protrusion 112 on the same blade 11 satisfies 360° / n, where n is the number of blades 11 on the same energy absorbing tube 1. The chiral modular self-locking energy absorbing system of the present technical solution realizes the dense paving effect of the energy absorbing tubes 1 in the cross section along the axial direction of the energy absorbing tube 1, can reduce the gaps between the energy absorbing tubes 1, can make more structures undergo plastic deformation when subjected to impact loads, and improve the energy absorption capacity of the chiral modular self-locking energy absorbing system. And the self-locking energy absorbing structure can be infinitely expanded within the axial cross section of the energy absorbing tube 1, and the number of energy absorbing tubes 1 required for each layer and each column can be flexibly adjusted according to actual conditions.

[0073] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0074] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A chiral modular self-locking energy absorption system, characterized in that: It comprises a plurality of energy absorbing tubes, each of which is provided with a plurality of blades along the circumferential direction, and each of the blades comprises: a first protrusion, wherein the first protrusion is arranged at an end of the blade; A second protrusion, wherein the second protrusion is connected to the first protrusion, an extension direction of the second protrusion intersects with an extension direction of the first protrusion, and a plurality of the second protrusions on the same energy absorbing tube are arranged in the same direction along the circumference of the energy absorbing tube; The second protrusion is connected to the root of an adjacent blade of the same energy absorbing tube to form a recessed portion, and the recessed portion is used to cooperate with the first protrusion of the adjacent energy absorbing tube.

2. A chiral modular self-locking energy absorption system according to claim 1, characterized in that: The outer wall of the energy absorbing tube is bent to form the blade, and the bending part has an arc transition.

3. The chiral modular self-locking energy absorption system according to claim 1, characterized in that: The depth h1 of the recessed portion is the same as the length h2 of the first protruding portion, and the width w1 of the recessed portion is the same as the width w2 of the first protruding portion.

4. The chiral modular self-locking energy absorption system according to claim 1, characterized in that: The number of the blades is three, and the three blades are evenly arranged along the circumference of the energy absorbing tube.

5. The chiral modular self-locking energy absorption system according to claim 4, characterized in that: The depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

6. The chiral modular self-locking energy absorption system according to claim 1, characterized in that: The number of the blades is four, and the four blades are evenly arranged along the circumference of the energy absorbing tube.

7. The chiral modular self-locking energy absorption system according to claim 6, characterized in that: The depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

8. The chiral modular self-locking energy absorption system according to claim 1, characterized in that: The number of the blades is six, and the remaining blades are evenly arranged along the circumference of the energy absorbing tube.

9. The chiral modular self-locking energy absorption system according to claim 8, characterized in that: The depth h1 of the recessed portion, the length h2 of the first protruding portion, and the wall thickness t of the energy absorbing tube satisfy Wherein L is the maximum distance between the two second protrusions that penetrate two adjacent blades of the same energy absorbing tube along the tangential direction of the energy absorbing tube.

10. The chiral modular self-locking energy absorption system according to any one of claims 4 to 9, characterized in that: The angle between the extension direction of the first protrusion and the extension direction of the second protrusion on the same blade satisfies 360° / n, where n is the number of the blades on the same energy absorbing tube.

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