Energy absorption box based on bamboo joint bionics cylinder structure

Abstract

The application provides a bamboo joint bionic cylinder structure energy absorption box, which comprises an energy absorption box body and an auxiliary energy absorption column; the energy absorption box body is composed of a honeycomb-like structure of a regular hexagonal thin-walled tube, a six-prism cavity extending from each side and an inner cavity containing a regular hexagonal thin-walled structure; the auxiliary energy absorption column is composed of a plurality of layer plates and bamboo joint thin-walled tubes inserted into the layer plates; the layer plate is consistent with the shape and size of the middle cavity of the energy absorption box body, is connected with the inner wall of the middle cavity through welding, and the axial position of the layer plate is perpendicular to the horizontal plane of the collapse groove on the six-prism cavity; the bamboo joint thin-walled tube is connected by a plurality of truncated six-prism shell units, two adjacent units are connected together through an inverted unit, and the lower bottom surface and the upper bottom surface of the truncated six-prism shell unit are different in size but parallel regular hexagons.

Description

Technical Field

[0001] This invention relates to the field of automotive collision energy absorption box technology, specifically to an energy absorption box with a cylindrical structure based on bamboo biomimicry. Background Technology

[0002] The automotive industry has evolved over a century, and safety remains paramount. However, existing energy-absorbing boxes have several serious shortcomings. First, their large size and weight increase the overall vehicle weight and air resistance, impacting fuel efficiency. Second, existing energy-absorbing boxes have limited energy absorption efficiency during collisions, failing to completely prevent damage to vehicles and occupants. Furthermore, the high production cost of existing energy-absorbing box materials limits their widespread application.

[0003] A deeper problem lies in the fact that most existing energy-absorbing boxes use traditional materials such as metal and rubber, which have limited energy absorption efficiency and strength. In terms of design, existing energy-absorbing boxes often employ a single shape and structure, making them unable to adapt to different collision scenarios. Furthermore, existing energy-absorbing boxes cannot simultaneously possess the characteristics of lightweight, high strength, and high energy absorption efficiency, posing a challenge in meeting both safety and energy-saving requirements.

[0004] Therefore, developing novel energy-absorbing boxes is essential. These new boxes should employ advanced materials and structural designs, such as fiber-reinforced composites and polymer materials, to improve energy absorption efficiency and strength, while also being lightweight and durable. Furthermore, they should utilize a variety of shapes and structural designs to adapt to different collision scenarios and achieve better impact cushioning and protection. In addition, the design and manufacturing processes of these new energy-absorbing boxes should be optimized to improve production efficiency and reduce costs, enabling their widespread adoption and application in a broad range of automotive applications. Summary of the Invention

[0005] This invention provides a cylindrical energy-absorbing box based on bamboo-joint biomimicry, which aims to effectively solve the problems of simple structure and weak mechanical properties of existing energy-absorbing boxes, and achieve better energy absorption capacity.

[0006] To achieve the above technical objectives, the present invention provides a cylindrical energy-absorbing box based on bamboo biomimicry, comprising: an energy-absorbing box body and an auxiliary energy-absorbing column;

[0007] The main body of the energy-absorbing box is a honeycomb-like structure composed of a regular hexagonal thin-walled tube, a hexagonal prism cavity extending from each side, and an inner cavity containing a regular hexagonal thin-walled structure;

[0008] The auxiliary energy-absorbing column is composed of multiple layers of thin-walled tubes arranged at intervals and inserted into the layers. The layers are the same size and shape as the central cavity of the energy-absorbing box body and are connected to the inner wall of the central cavity by welding. The axial position of the layers is perpendicular to the horizontal plane where the collapse groove on the hexagonal cavity is located. The thin-walled tube is composed of multiple truncated hexagonal pyramid shell-shaped units connected together. Two adjacent units are connected together by an inverted unit. The lower and upper surfaces of the truncated hexagonal pyramid shell-shaped units are parallel regular hexagons of different sizes.

[0009] In a preferred embodiment: the auxiliary energy-absorbing columns are evenly arranged around the central axis of the energy-absorbing box.

[0010] In a preferred embodiment: the bottom surface of the unit is connected to the top surface of the inverted unit, and the connection is connected to the shelf; the bottom surface of the inverted unit is connected to the top surface of the next unit.

[0011] In a preferred embodiment: the hexagonal prism cavity of the energy-absorbing box body has spaced through slots.

[0012] In a preferred embodiment: the through groove is a strip-shaped groove, the long groove direction of which is perpendicular to the axial direction of the energy-absorbing box and intersects the plane of the layer plate.

[0013] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0014] 1. This invention provides a cylindrical energy-absorbing box based on bamboo biomimicry. The structure of this energy-absorbing box is a structure obtained from the macroscopic structure of bamboo joints. Bamboo joints have unique structural features and excellent mechanical properties, and as an impact-resistant tubular structure, they have excellent impact resistance.

[0015] 2. This invention provides a cylindrical energy-absorbing box based on bamboo-joint biomimicry, which exhibits good stability under pressure due to its hollow hexagonal thin-walled cross-section. Simultaneously, bamboo-joint layers ensure stability under localized pressure. The bamboo joints and internodes form a unified whole, coordinating deformation and providing excellent energy absorption and bending resistance when facing collisions at different angles.

[0016] 3. This invention provides a cylindrical energy-absorbing box based on bamboo-joint biomimicry, which has a compression efficiency far higher than traditional energy-absorbing box structures. The honeycomb-like energy-absorbing box body is combined with bamboo-joint structure auxiliary energy-absorbing columns, giving it a hierarchical internal structure. Under axial load, the honeycomb-like energy-absorbing box has a significant energy absorption advantage over square and circular energy-absorbing boxes. Under lateral load, the hierarchical structure formed by the energy-absorbing box body and auxiliary energy-absorbing columns can better achieve the energy absorption effect.

[0017] 4. This invention provides a cylindrical energy-absorbing box based on bamboo-joint biomimicry. The box is made of aluminum alloy, whose excellent material toughness allows the crushing induction grooves of the main body to more easily undergo multiple folding deformations, ensuring that the deformation of the energy-absorbing box remains within the optimal range for energy absorption. The concave portion of the auxiliary energy-absorbing column is not on the same plane as the layer plate, enabling a layer-by-layer crushing deformation mode and enhancing energy absorption capacity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the energy-absorbing box of the present invention;

[0019] Figure 2 This is a schematic diagram of the front view structure of the energy-absorbing box of the present invention;

[0020] Figure 3 This is a top view of the energy-absorbing box of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the energy-absorbing box body of the present invention;

[0022] Figure 5 This is a schematic diagram of the auxiliary energy-absorbing column structure of the energy-absorbing box of the present invention;

[0023] Figure 6 This is a schematic diagram of the explosion structure of the energy-absorbing box and auxiliary energy-absorbing column of the present invention;

[0024] Figure 7 This is a top view of the auxiliary energy-absorbing column structure of the energy-absorbing box of the present invention;

[0025] Figure 8 This is a schematic diagram of the main structure of the auxiliary energy-absorbing column of the energy-absorbing box of the present invention. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0029] like Figures 1 to 8 As shown, a bamboo-inspired cylindrical energy-absorbing box includes an energy-absorbing box body and an auxiliary energy-absorbing column. The energy-absorbing box body has a honeycomb-like structure, and the auxiliary energy-absorbing column is composed of a layered plate and a bamboo-shaped thin-walled tube.

[0030] like Figure 4 As shown, the main body of the energy-absorbing box consists of a regular hexagonal thin-walled tube 101, a hexagonal prism cavity 103 extending from each side, and an inner cavity 102 containing a regular hexagonal thin-walled structure. Its cross-section is honeycomb-like, with good structural strength. Furthermore, the hexagonal prism cavity 103 is provided with collapse grooves 104 on the spaced prism surfaces, which helps to better absorb energy during compression deformation.

[0031] like Figure 7 As shown, the auxiliary energy-absorbing column is composed of multiple layers of thin-walled tubes arranged at intervals and inserted into the layers. The layer 201 is identical in shape and size to the central cavity 102 of the energy-absorbing box body and is connected by welding. The axial position of the layer 201 is perpendicular to the horizontal plane containing the collapse groove 104 on the hexagonal cavity 103. Considering the seismic resistance characteristics of bamboo in building structures, a biomimetic hexagonal thin-walled energy-absorbing column structure was derived by studying the bamboo cavity and joint structure. The thin-walled tube is composed of multiple truncated hexagonal pyramidal shell-shaped units connected together, with adjacent units connected by an inverted unit. The lower base 203 and upper base 204 of the truncated hexagonal pyramidal shell-shaped units are parallel regular hexagons of different sizes.

[0032] The main body of the energy-absorbing box of this invention is made of metal, with a reinforcing fiber composite material as the inner lining. The metal is an aluminum alloy, manufactured using wire cutting technology, and is used for the main body's hexagonal thin-walled tube 101 outer shell, the extended hexagonal prism cavity 103 outer shell, the inner cavity 102 outer shell, and the overall structure of the auxiliary energy-absorbing columns. The inner lining is a carbon fiber composite material, manufactured using mold assistance, and serves as the inner wall of the extended hexagonal prism cavity 103 and the inner cavity 102 of the energy-absorbing box main body. The outer shell tube and the inner lining are connected by heat curing. The inner lining has high rigidity and strength, while the outer shell has good flexibility. Using materials with significantly different performance characteristics allows for weight reduction and performance enhancement.

[0033] Working principle:

[0034] When subjected to low-speed impact, the main body of the energy-absorbing box of this invention functions first, with the honeycomb-like thin-walled tube enhancing its impact resistance. After the auxiliary energy-absorbing column's upper bottom surface 204 is subjected to an impact load, it contracts along the prism of the connecting unit, transferring the impact load to the lower bottom surface 203 and the layer plate 201. At this time, the collapse groove 104 on the outer wall of the energy-absorbing box induces deformation. The auxiliary energy-absorbing column absorbs the impact load through plastic deformation, and the impact load is simultaneously transmitted between multiple energy absorbers, enhancing the energy absorption capacity. The two layers 201 are connected by the lower bottom surface 204, forming an open-bottom hexagonal pyramidal hollow shell with an overall concave shape and negative Poisson's ratio characteristics. During deformation, the overall structure deforms inward, guiding the collapse.

[0035] The above description is merely a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention by those skilled in the art within the scope of the technology disclosed in the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A cylindrical energy-absorbing box based on bamboo-joint biomimicry, characterized in that... include: The main body of the energy-absorbing box and the auxiliary energy-absorbing column; The main body of the energy-absorbing box is a honeycomb-like structure composed of a regular hexagonal thin-walled tube, a hexagonal prism cavity extending from each side, and an inner cavity containing a regular hexagonal thin-walled structure; The auxiliary energy-absorbing column is composed of multiple layers of plates arranged at intervals and bamboo-shaped thin-walled tubes inserted into the layers; wherein the layers are the same shape and size as the central cavity of the energy-absorbing box body, and are connected to the inner wall of the central cavity by welding, and the axial position of the layers is perpendicular to the horizontal plane where the collapse groove on the hexagonal cavity is located; the bamboo-shaped thin-walled tube is composed of multiple truncated hexagonal pyramid shell-shaped units connected together, wherein two adjacent units are connected together by an inverted unit, and the lower and upper base surfaces of the truncated hexagonal pyramid shell-shaped units are parallel regular hexagons of different sizes; The auxiliary energy-absorbing columns are evenly arranged around the central axis of the energy-absorbing box; the bottom surface of the unit is connected to the top surface of the inverted unit, and the connection is connected to the shelf; the bottom surface of the inverted unit is connected to the top surface of the next unit.

2. The energy-absorbing box with a cylindrical structure based on bamboo biomimicry according to claim 1, characterized in that: The energy-absorbing box body has a hexagonal prism cavity with spaced through slots.

3. The energy-absorbing box with a cylindrical structure based on bamboo joint biomimicry according to claim 2, characterized in that: The through groove is a strip-shaped groove, with the long groove direction perpendicular to the axis of the energy-absorbing box and intersecting the plane of the layer plate.

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