A chiral modular self-locking energy absorption system

Abstract

The present invention discloses a chiral modular self-locking energy absorption system, which is formed by splicing a plurality of energy absorption 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 absorption tubes are spliced ​​together, the first protrusion is inserted into the recessed portion of the adjacent energy absorption tube. Since the blades are distributed along the circumference of the energy absorption tube, the recessed portion is also distributed along the circumference of the energy absorption tube. The cooperation formed by each pair of first protrusions and recessed portions constrains the energy absorption tube in a different direction, so that each energy absorption tube in the chiral modular self-locking energy absorption system is constrained in all directions on the radial plane, forming self-locking, so that the chiral modular self-locking energy absorption system can maintain good self-locking stability when responding to 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 across various fields, including transportation, civil engineering, mechanical engineering, and petroleum engineering. Impact loads not only threaten human life and property, but can also cause ecological damage, posing a significant safety hazard. Energy-absorbing structures are key protective devices against impact loads, typically absorbing the majority of the impact energy through plastic deformation.

[0003] Traditional circular tube energy-absorbing structures, without external restraints, can cause splashing when impacted, significantly reducing the structure's energy absorption efficiency. Most self-locking energy-absorbing systems in related technologies only maintain self-locking stability when responding to impact loads in specific directions, failing to adequately handle the complex impact loads encountered in actual production. Therefore, there is an urgent need for an energy-absorbing structure that can maintain good self-locking stability under impact loads from 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 responding to impact loads in a specific direction. It can maintain good self-locking stability when responding to impact loads in various directions.

[0005] To achieve the above objectives, the present invention provides a chiral modular self-locking energy absorption system, comprising a plurality of energy absorption tubes, each of which is provided with a plurality of blades along the circumference, wherein the blades include:

[0006] a first protrusion, the first protrusion being provided at an end of the blade;

[0007] a second protrusion, the second protrusion being connected to the first protrusion, the extension direction of the second protrusion intersecting with the extension direction of the first protrusion, and a plurality of the second protrusions on the same energy absorbing tube being arranged in the same direction along the circumference of the energy absorbing tube;

[0008] 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 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, forming a self-locking state, so that the chiral modular self-locking energy absorbing system can maintain good self-locking stability when responding to 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 in a circular 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 circular arc transition at the bend gives the energy absorbing tube better structural processability, which is beneficial to reducing the manufacturing cost of the energy absorbing tube and the chiral modular self-locking energy absorbing system, and improving the production efficiency of the energy absorbing tube and the chiral modular self-locking energy absorbing 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 absorbing system. It is easy to operate and flexible to use.

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

[0011] As an optional technical solution, the number of 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 gaps between the energy absorbing tubes, allowing 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same energy absorbing tube.

[0013] As an optional technical solution, the number of 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 gaps between the energy absorbing tubes, allowing 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same energy absorbing tube.

[0015] As an optional technical solution, the number of blades is six, and the six blades are evenly arranged along the circumference of the energy absorbing tube. This even distribution of blades can reduce the gaps between the energy absorbing tubes, allowing 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same 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 along the axial cross-section 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. In addition, 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 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 together a plurality of energy absorbing tubes having blades, wherein the blades include a first protrusion at an end portion 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 portions are 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 absorbing system is constrained in all directions on the radial plane, forming a self-locking state. This enables the chiral modular self-locking energy absorbing system to maintain good self-locking stability when responding to impact loads in various directions.

[0020] 2. The energy absorbing tube of the present invention can be produced using traditional manufacturing technology, such as stamping technology. 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 of 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 sizes of the medium 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 sizes of the medium energy absorbing tube;

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

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

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

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

[0035] Figure 13 for Figure 11 Schematic diagram of various sizes of the medium energy absorbing tube;

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

[0037] Figure 15 for Figure 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the present invention, terms such as "upper" and "outer" indicate orientations or positions based on those shown in the accompanying drawings. These terms are intended to better describe the present invention and its embodiments and are not intended to limit the devices, elements, or components indicated to specific orientations, or to their construction or operation.

[0041] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0043] Furthermore, the terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0044] Collision accidents are common across various fields, including transportation, civil engineering, mechanical engineering, and petroleum engineering. Impact loads not only threaten human life and property, but can also cause ecological damage, posing a significant safety hazard. Energy-absorbing structures are key protective devices against impact loads, typically absorbing the majority 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 an integrated manner 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 stress 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 that of traditional manufacturing. The scope of application is narrow, the industry scale is small, and the manufacturing cost is still much higher than that of traditional manufacturing. Therefore, how to manufacture metal-based energy-absorbing structures with reliable performance at low cost remains a challenge. In addition, the integrated structure is not flexible enough in responding to demand.

[0046] Traditional circular tube energy-absorbing structures, without external constraints, can splash when impacted, significantly reducing the structure's energy absorption efficiency. Furthermore, existing self-locking energy-absorbing systems often only maintain self-locking stability when responding to impact loads in a specific direction. Other issues hinder their application and widespread adoption, including complex and expensive configurations, unusual cross-sectional shapes, inconvenient assembly and disassembly, and unstable energy absorption. Therefore, there is an urgent engineering need to develop modular energy-absorbing structures that are inexpensive to produce, flexible to meet demand, and offer 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 absorption tubes with blades, wherein the blade includes 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 the adjacent blade to form a recessed portion. When multiple energy absorption tubes are spliced ​​together, the first protrusion is inserted into the recessed portion of the adjacent energy absorption tube. Since the blades are distributed along the circumference of the energy absorption tube, the recessed portion is also distributed along the circumference of the energy absorption tube. The cooperation formed by each pair of first protrusions and recessed portions constrains the energy absorption tube in a different direction, so that each energy absorption tube in the chiral modular self-locking energy absorption system is constrained in all directions on the radial plane, forming self-locking, so that the chiral modular self-locking energy absorption system can maintain good self-locking stability when responding to impact loads in various directions.

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

[0049] Example 1

[0050] The present invention provides a chiral modular self-locking energy absorption system, comprising a plurality of energy absorption tubes 1, each circumferentially provided with a plurality of blades 11. Blades 11 include a first protrusion 111 and a second protrusion 112. First protrusion 111 is disposed at the end of blade 11. Second protrusion 112 is connected to first protrusion 111, and the extension direction of second protrusion 112 intersects the extension direction of first protrusion 111. Multiple second protrusions 112 on the same energy absorption tube 1 are arranged in the same direction along the circumference of the 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 . 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 recess 12 of the adjacent energy absorbing tube 1. Since the blades 11 are distributed along the circumference of the energy absorbing tube 1, the recess 12 is also distributed along the circumference of the energy absorbing tube 1. The cooperation formed by each pair of first protrusions 111 and recesses 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, forming self-locking, so that the chiral modular self-locking energy absorbing system can maintain good self-locking stability when responding to impact loads in various directions.

[0053] Example 2

[0054] On the basis of Example 1, the outer wall of the energy absorbing tube 1 is bent to form blades 11, and the bend is an arc transition. Since the blades 11 are 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 out of ordinary round tubes, square tubes or polygonal tubes. In addition, the arc transition at the bend gives the energy absorbing tube 1 better structural processability, which is beneficial to reducing the manufacturing cost of the energy absorbing tube 1 and the chiral modular self-locking energy absorbing system, and improving the production efficiency of the energy absorbing tube 1 and the chiral modular self-locking energy absorbing 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 absorbing system, which is easy to operate and flexible to use.

[0055] As an optional embodiment, the depth h1 of the recessed portion 12 is equal to the length h2 of the first protruding portion 111, and the width w1 of the recessed portion 12 is equal to 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 more stable fit, thereby improving the stability of the constraint between adjacent energy absorbing tubes 1 and further enhancing the energy absorption effect of the chiral modular self-locking energy absorption system.

[0056] Example 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, allowing 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 Where L is the maximum distance between two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction. 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. 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] For example, 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 the figure below. 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 to the existing technology (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, and 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 the figure below. 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 to the existing technology (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0061] Example 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, allowing 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 Where L is the maximum distance between two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction. 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. 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 the figure below. Figure 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 existing technology (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 the figure below. Figure 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 to the existing technology (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0066] Example 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 blades 11 can reduce the gaps between the energy absorbing tubes 1, allowing 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 Where L is the maximum distance between two second protrusions 112 of two adjacent blades 11 of the same energy absorbing tube 1 along the tangential direction. 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. 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 the figure below. Figure 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 existing technology (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 the figure below. Figure 15 As shown, 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 to the existing technology (CN103398122A), and the total amount of energy absorbed is greatly improved.

[0071] Example 6

[0072] On the basis of Example 3, Example 4, or Example 5, 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 this technical solution achieves a dense paving effect of the energy absorbing tubes 1 along the axial cross-section of the energy absorbing tube 1, 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 absorbing system. In addition, 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 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 additional 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 may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A chiral modular self-locking energy absorption system, characterized in that: The energy absorbing tube comprises a plurality of energy absorbing tubes, each of which is provided with a plurality of blades along the circumferential direction, each blade comprising: a first protrusion, the first protrusion being provided at an end of the blade; a second protrusion, the second protrusion being connected to the first protrusion, the extension direction of the second protrusion intersecting with the extension direction of the first protrusion, and a plurality of the second protrusions on the same energy absorbing tube being arranged in the same direction along the circumference of the energy absorbing tube; In which, 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. The depth h1 of the recessed portion is the same as the length h2 of the first protrusion, and the width w1 of the recessed portion is the same as the width w2 of the first protrusion.

2. The 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 portion has an arc transition.

3. 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.

4. The chiral modular self-locking energy absorption system according to claim 3, 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same energy absorbing tube.

5. 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.

6. The chiral modular self-locking energy absorption system according to claim 5, 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same energy absorbing tube.

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

8. The chiral modular self-locking energy absorption system according to claim 7, 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 along the tangential direction of the energy absorbing tube and penetrating two adjacent blades of the same energy absorbing tube.

9. The chiral modular self-locking energy absorption system according to any one of claims 4 to 8, 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 blades on the same energy absorbing tube.

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