A rotationally symmetric anti-oblique-compression paper tube collision energy absorption box

Abstract

This invention discloses a rotationally symmetric anti-oblique-pressure folded paper tube collision energy-absorbing box, belonging to the technical field of collision energy-absorbing boxes. It solves the problems of large initial collision loads and low energy absorption efficiency in existing collision energy-absorbing boxes. It includes at least one energy-absorbing box body, which includes a wall. Multiple energy-absorbing units are arranged along a circumferential direction on the wall. Each energy-absorbing unit includes a first polygonal folded paper unit and a second polygonal folded paper unit with identical structures. Adjacent first and second polygonal folded paper units are arranged alternately in a forward and backward orientation, respectively. The two first polygonal folded paper units located on the diagonal of the energy-absorbing box body are rotationally symmetric. This invention, through a diagonal misalignment design, provides support to the top corner that contacts the pressure head, causing the two sides of the top corner to jointly bear the load and concave inward, thereby deforming according to a preset, highly efficient, fully diamond-shaped deformation mode, providing resistance to oblique pressure.

Description

Technical Field

[0001] This invention relates to the field of collision energy absorption box technology, specifically to a rotationally symmetric anti-oblique pressure folding paper tube collision energy absorption box. Background Technology

[0002] Collision energy absorption design is a crucial aspect of passive safety design in automobiles. Current passive safety designs typically employ bumper systems installed at the front and rear of the vehicle to reduce structural damage during low-speed collisions, thereby ensuring the safety of occupants and the vehicle's main structure. To absorb as much kinetic energy as possible during an impact, modern bumper systems often incorporate a deformable element, known as a collision energy absorption box.

[0003] Collision energy-absorbing boxes are the main collision energy-absorbing components installed between the front and rear bumpers and the horizontal and vertical beams of a car. In the event of a collision, the energy-absorbing box can collapse, producing irreversible plastic deformation, thus converting the impact kinetic energy into the plastic deformation energy of the material, thereby protecting the safety of the passengers inside the vehicle.

[0004] Currently, in the automotive industry, traditional collision energy absorption boxes are mostly made of square or round tubes. Although these types of collision boxes are very easy to manufacture, they experience extremely high initial collision loads upon impact. Furthermore, square and round tubes have very low energy absorption efficiency during crumpling and deformation, which can easily threaten the vehicle frame and passenger safety. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides a rotationally symmetric anti-oblique pressure folding paper tube collision energy absorption box, which solves the problems of large initial collision load and low energy absorption efficiency in existing collision energy absorption boxes.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A rotationally symmetric anti-oblique-pressure folded paper tube collision energy-absorbing box is provided, comprising at least one energy-absorbing box body. The energy-absorbing box body includes a wall that unfolds into a planar rectangle. The wall is arranged around the body and adjacent short sides are welded together. Multiple energy-absorbing units are arranged along the surrounding direction on the wall. Each energy-absorbing unit includes a first polygonal folded paper unit and a second polygonal folded paper unit with the same structure. Adjacent first polygonal folded paper units and second polygonal folded paper units are arranged alternately in a forward and backward orientation, respectively. Two first polygonal folded paper units or two second polygonal folded paper units located on the diagonal of the energy-absorbing box body are rotationally symmetric. The forward orientation is the vertical upward direction of the wall. The creases between the first polygonal folded paper units and the second polygonal folded paper units are all peak creases. Each first polygonal folded paper unit includes at least an isosceles triangular plate and a quadrilateral plate connected from top to bottom. The crease between the base of the isosceles triangular plate and the top of the quadrilateral plate is a valley crease. The quadrilateral plate is in the shape of an isosceles trapezoid or a rectangle.

[0008] In this design, the first and second polygonal origami units on the main body of the energy-absorbing box are rotationally symmetrically arranged, forming a diagonal misalignment design. This diagonal misalignment design provides support to the top corner of the energy-absorbing box body that contacts the pressure head, causing the two sides of the top corner to jointly bear the load and concave inward. This results in deformation according to a preset, highly efficient, fully diamond deformation mode, making the energy-absorbing box more resistant to oblique pressure. Compared with ordinary rectangular cross-section tubes, i.e., traditional square tubes, the peak and valley creases created by the preset rotationally symmetrical energy-absorbing units can act as initial moving defects, guiding the energy-absorbing box to undergo preset deformation. Under positive pressure conditions, the initial buckling load is significantly reduced compared to traditional square tube structures. Simultaneously, as the energy-absorbing box continues to deform, the average force gradually increases, thereby achieving the goals of reducing the initial peak load, increasing the average force, improving collision load efficiency, and increasing specific energy absorption.

[0009] Furthermore, each first polygonal origami unit comprises, from top to bottom, an isosceles triangular plate, a quadrilateral plate, and an isosceles trapezoidal plate connected to each other, and the crease between the top edge of the isosceles trapezoidal plate and the bottom edge of the quadrilateral plate is a peak crease.

[0010] Furthermore, the dimensional relationships within each energy-absorbing unit are as follows:

[0011]

[0012] Wherein, a1 and b1 are the top and bottom edge lengths of the quadrilateral plate in the second polygonal origami unit, respectively; a2 and b2 are the top and bottom edge lengths of the quadrilateral plate in the first polygonal origami unit, respectively; h1 is the height of the isosceles triangle plate in the first polygonal origami unit and the height of the isosceles trapezoid plate in the second polygonal origami unit; h2 is the height of the quadrilateral plate in the first polygonal origami unit and the height of the quadrilateral plate in the second polygonal origami unit; h3 is the height of the isosceles trapezoid plate in the first polygonal origami unit and the height of the isosceles triangle plate in the second polygonal origami unit; H is the height of the energy-absorbing unit and the main body of the energy-absorbing box; α is the folding angle between the isosceles trapezoid plate and the quadrilateral plate in the first polygonal origami unit and the folding angle between the triangle plate and the quadrilateral plate in the second polygonal origami unit; β is the folding angle between the quadrilateral plate and the isosceles triangle plate in the first polygonal origami unit and the folding angle between the quadrilateral plate and the isosceles trapezoid plate in the second polygonal origami unit.

[0013] In this scheme, as the height ratio h1(h2) / h3 increases, the initial peak force of the energy-absorbing box under different impact angles increases significantly. For the average force, the energy-absorbing box increases with the increase of the crease height ratio h1(h2) / h3, and the change in average force tends to be gradual after the height ratio reaches 11 / 8. The load crushing efficiency exceeds 100% when the height ratio is less than 1 / 2, but decreases significantly as the height ratio increases, and then the energy absorption performance of the energy-absorbing box decreases. As the crease length ratio a1(b1) / a2(b2) increases, α and β gradually increase, the initial stiffness of the energy-absorbing box decreases, and the initial peak force under different impact angles decreases. As the crease ratio increases, the ability of the edge corresponding to crease a2(b2) to guide deformation is enhanced, and the average force continuously increases. Similarly, the load crushing efficiency also increases with the increase of the crease length ratio.

[0014] Furthermore, in each energy-absorbing unit, a1 = b1 and a2 = b2.

[0015] Furthermore, in each energy-absorbing unit, a1>b1 and a2>b2.

[0016] Furthermore, in each energy-absorbing unit, a2>a1 and b2>a1.

[0017] Furthermore, the number of energy-absorbing box bodies is at least two, and the end faces of two adjacent energy-absorbing box bodies are fixedly connected and mirrored along the fixed end face.

[0018] Furthermore, the end faces of two adjacent energy-absorbing box bodies are welded, molded, or bonded together.

[0019] This invention discloses a rotationally symmetric anti-oblique pressure folding paper tube collision energy-absorbing box, the beneficial effects of which are:

[0020] 1. The invention has a lower initial collision load and a higher average collision load. The supporting effect of the peak fold and valley fold makes the deformation of the energy-absorbing box more stable and causes progressive deformation, resulting in higher energy absorption efficiency. The diagonal misalignment design provides support to the top corner of the energy-absorbing box that contacts the pressure head, so that the two sides of the top corner jointly bear the load and concave inward, thereby deforming according to the preset full diamond deformation mode with high energy absorption efficiency, making the energy-absorbing box more resistant to oblique pressure.

[0021] 2. By changing the geometric dimensions of the rotationally symmetric pattern and the height of each layer, the present invention can change the size of the energy-absorbing box, enhance the designability of the structure, and obtain energy-absorbing boxes with different energy absorption effects.

[0022] 3. The main body of the energy-absorbing box of the present invention is a specially shaped thin-walled tube formed by introducing peak and valley fold lines with rotationally symmetrical patterns onto the wall of an ordinary thin-walled tube. A significant feature of the present invention is that its side edges are, along the axial direction, inwardly folded isosceles triangles, quadrilaterals parallel to the axial direction or protruding outwards, and inwardly folded isosceles trapezoids. The heights of the three layers along the axial direction can be the same or different, and the double-layer structure obtained by removing one layer can also serve as the smallest unit of the energy-absorbing box. Attached Figure Description

[0023] Figure 1 This is a planar development of a rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box;

[0024] Figure 2 This is a schematic diagram of a rotationally symmetric anti-oblique-pressure-folding paper tube collision energy-absorbing box after molding.

[0025] Figure 3 A schematic diagram comparing the force-displacement curves of a rotationally symmetric, oblique-pressure resistant origami tube collision energy-absorbing box and a traditional square tube energy-absorbing box under positive pressure load.

[0026] Figure 4 A schematic diagram comparing the force-displacement curves of a rotationally symmetric anti-oblique-compression paper tube collision energy-absorbing box with traditional square tube energy-absorbing boxes and diamond-patterned tube energy-absorbing boxes under oblique-compression load.

[0027] Figure 5 A schematic diagram of a rotationally symmetric anti-oblique-compression paper tube collision energy-absorbing box;

[0028] Figure 6 A schematic diagram of a rotationally symmetric anti-oblique-compression paper tube collision energy-absorbing box;

[0029] Figure 7 A schematic diagram of a rotationally symmetric anti-oblique-compression paper tube collision energy-absorbing box;

[0030] Figure 8A schematic diagram of a rotationally symmetric anti-oblique pressure folding paper tube collision energy-absorbing box connecting two energy-absorbing box bodies;

[0031] Figure 9 A schematic diagram of a rotationally symmetric anti-oblique pressure folding paper tube collision energy-absorbing box connecting two energy-absorbing box bodies;

[0032] Among them, 1. Energy-absorbing box body; 2. Lower end free boundary; 3. Peak fold; 4. Valley fold; 5. Upper end free boundary; 6. Isosceles triangular plate; 7. Quadrilateral plate; 8. Isosceles trapezoidal plate. Detailed Implementation

[0033] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0034] Example 1

[0035] refer to Figure 1 and Figure 2 This embodiment provides a rotationally symmetric anti-oblique pressure paper tube collision energy-absorbing box, including at least one energy-absorbing box body 1. The energy-absorbing box body 1 includes a wall that unfolds into a planar rectangle. The wall is arranged around the body and adjacent short sides are welded together. The top and bottom ends of the wall are respectively the upper end free boundary 6 and the lower end free boundary 2.

[0036] Multiple energy-absorbing units are arranged along the surrounding direction on the wall. Each energy-absorbing unit includes a first polygonal origami unit and a second polygonal origami unit with the same structure. Adjacent first polygonal origami units and second polygonal origami units are arranged alternately in the forward and backward directions, respectively. The two first polygonal origami units or the two second polygonal origami units located on the diagonal of the energy-absorbing box body 1 are arranged in rotational symmetry. The forward direction is the vertical upward direction of the wall. The crease between the first polygonal origami unit and the second polygonal origami unit is a peak crease 3.

[0037] Because the first and second polygonal origami units on the energy-absorbing box body 1 are rotationally symmetrically arranged, a diagonal offset design is formed. This diagonal offset design allows the top corner of the energy-absorbing box body 1, which contacts the indenter, to provide support. This causes the two sides of the top corner to share the load and concave inward, thus deforming according to a pre-set, highly energy-absorbing, fully diamond-shaped deformation mode, making the energy-absorbing box more resistant to oblique pressure. Furthermore, when the indenter acts on the edge of the energy-absorbing box body 1, the lower top corner of the energy-absorbing box body 1 can also provide support. That is, if the external load (such as the impact force) mainly acts on one edge of the energy-absorbing box body 1, rather than directly perpendicular to its surface, the design of the energy-absorbing box body 1 allows its lower top corner to also participate in supporting and resisting the load. This design enhances the effectiveness and stability of the energy-absorbing box under multi-directional loads, ensuring that even at unexpected collision angles, energy can be effectively absorbed and dispersed, reducing the impact on other parts of the vehicle.

[0038] Compared with ordinary rectangular cross-section tubes, i.e. traditional square tubes, the peak fold 3 and valley fold 4 brought about by the pre-set rotationally symmetric energy-absorbing unit can exist as moving initial defects, guiding the energy-absorbing box to undergo pre-set deformation. Under positive pressure conditions, the initial buckling load is significantly reduced compared with the traditional square tube structure. At the same time, as the energy-absorbing box continues to deform, the average force gradually increases, thereby achieving the purpose of reducing the initial peak load, increasing the average force, improving the collision load efficiency, and increasing the specific energy absorption.

[0039] For details, please refer to the following: Figure 3 , Figure 3 This diagram illustrates the force-displacement curves of a rotationally symmetric, oblique-pressure resistant origami tube impact energy-absorbing box and a traditional square tube energy-absorbing box under positive pressure load. It can be observed that the rotationally symmetric, oblique-pressure resistant origami tube method, by introducing peak crease 3 and valley crease 4 as initial defects, significantly reduces the initial peak force under positive pressure compared to the traditional square tube, by 60.1%. Simultaneously, the average force borne by the impact energy-absorbing box is greatly increased, and the force-displacement curve remains at a high level after the initial peak, indicating a significant improvement in energy absorption efficiency, by 42.3%, thus enhancing the impact resistance of the energy-absorbing box.

[0040] Example 2

[0041] refer to Figure 1 and Figure 2 This embodiment is based on Embodiment 1 with further limitations. The specific improvement is in providing the specific structure of the first polygonal origami unit and the second polygonal origami unit. Other parts not mentioned refer to Embodiment 1 or the prior art.

[0042] Each first polygonal origami unit includes, from top to bottom, an isosceles triangular plate 6, a quadrilateral plate 7, and an isosceles trapezoidal plate 8 connected to each other. The quadrilateral plate 7 is in the shape of an isosceles trapezoid or a rectangle, and the crease between the top edge of the quadrilateral plate 7 and the wall of the isosceles triangular plate 6 is a valley crease 4, and the crease between the bottom edge of the quadrilateral plate 7 and the top edge of the isosceles trapezoidal plate 8 is a peak crease 3.

[0043] This arrangement causes the isosceles triangular plate 6 to fold inward and be recessed, the quadrilateral plate 7 to bulge outward, and the isosceles trapezoidal plate 8 to fold inward and be recessed, resulting in creases with peaks and troughs between each pair of the three regions, thus improving the impact resistance of the energy-absorbing box.

[0044] The dimensional relationships within each energy-absorbing unit are as follows:

[0045]

[0046] Wherein, a1 and b1 are the top and bottom edge lengths of the quadrilateral plate 7 in the second polygonal origami unit, respectively; a2 and b2 are the top and bottom edge lengths of the quadrilateral plate 7 in the first polygonal origami unit, respectively; h1 is the height of the isosceles triangle plate 6 in the first polygonal origami unit and the height of the isosceles trapezoid plate 8 in the second polygonal origami unit; h2 is the height of the quadrilateral plate 7 in the first polygonal origami unit and the height of the quadrilateral plate 7 in the second polygonal origami unit; h3 is the height of the isosceles trapezoid plate 8 in the first polygonal origami unit and the height of the isosceles triangle plate 6 in the second polygonal origami unit; H is the height of the energy-absorbing unit and the energy-absorbing box body 1; α is the folding angle between the isosceles trapezoid plate 8 and the quadrilateral plate 7 in the first polygonal origami unit, and the folding angle between the triangle plate and the quadrilateral plate 7 in the second polygonal origami unit; β is the folding angle between the quadrilateral plate 7 and the isosceles triangle plate 6 in the first polygonal origami unit, and the folding angle between the quadrilateral plate 7 and the isosceles trapezoid plate 8 in the second polygonal origami unit.

[0047] In this embodiment, as the height ratio h1(h2) / h3 increases, the initial peak force of the energy-absorbing box at different impact angles increases significantly. For the average force, the energy-absorbing box increases with the increase of the crease height ratio h1(h2) / h3, and the change in average force tends to be gradual after the height ratio reaches 11 / 8. The load crushing efficiency exceeds 100% when the height ratio is less than 1 / 2, but decreases significantly as the height ratio increases, and then the energy absorption performance of the energy-absorbing box decreases. As the crease length ratio a1(b1) / a2(b2) increases, α and β gradually increase, the initial stiffness of the energy-absorbing box decreases, and the initial peak force at different impact angles decreases. As the crease ratio increases, the ability of the edge corresponding to crease a2(b2) to guide deformation is enhanced, and the average force continuously increases. Similarly, the load crushing efficiency also increases with the increase of the crease length ratio.

[0048] To illustrate the superior impact resistance of the energy-absorbing box in this embodiment, a comparison is made with the inventor's previous patent publication CN101638076B—a crease-type impact energy-absorbing box. That invention employs a diamond-shaped crease pattern impact energy-absorbing box, which not only absorbs more impact energy but also significantly reduces the initial peak impact load compared to traditional square tubes. However, this invention further enhances impact resistance through a diagonal offset design.

[0049] For details, please refer to the following: Figure 4 , Figure 4 This diagram compares the force-displacement curves of a rotationally symmetric anti-oblique-pressure origami tube collision energy-absorbing box with those of a traditional square tube energy-absorbing box and a diamond-patterned tube energy-absorbing box under oblique-pressure load. It can be observed that this rotationally symmetric diagonal offset origami design, due to the supporting effect of the apex corner, still deforms according to the preset diamond deformation pattern under oblique pressure, resulting in a significant reduction in the initial peak force. Compared to the traditional square tube, the initial peak force is reduced by 55.7%. Simultaneously, the average load of the collision energy-absorbing box is improved. It is noteworthy that compared to the diamond-patterned tube energy-absorbing box, the average load of the rotationally symmetric anti-oblique-pressure origami tube collision energy-absorbing box is also improved. The force-displacement curve remains at a high level after the initial peak, with an average force increase of 26.4% compared to the diamond-patterned tube energy-absorbing box, thus enhancing the impact resistance of the energy-absorbing structure under oblique pressure.

[0050] As a further embodiment, refer to Figure 5 In each energy-absorbing unit, a1 = b1 and a2 = b2.

[0051] As another solution in this embodiment, refer to Figure 6 In each energy-absorbing unit, a1>b1 and a2>b2.

[0052] As another solution in this embodiment, refer to Figure 7 In each energy-absorbing unit, a1>b1 and a2>b2.

[0053] Example 3

[0054] Referring to the figure, this embodiment is a further limitation based on embodiment 2. The specific improvement is in providing the specific structure of the first polygonal origami unit and the second polygonal origami unit. Other parts not mentioned refer to embodiment 1 or the prior art.

[0055] refer to Figure 5 Each first polygonal origami unit includes at least an isosceles triangular plate 6 and a quadrilateral plate 7 connected from top to bottom. The crease between the bottom edge of the isosceles triangular plate 6 and the top edge of the quadrilateral plate 7 is a valley crease 4. The quadrilateral plate 7 is in the shape of an isosceles trapezoid or a rectangle.

[0056] Example 4

[0057] This embodiment is a further limitation based on embodiment 2. The specific improvement is to provide another component structure of the rotationally symmetric anti-oblique pressure folding paper tube collision energy absorption box. Other parts not mentioned refer to embodiment 2 or the prior art.

[0058] refer to Figure 8 and Figure 9 In this embodiment, the number of energy-absorbing box bodies 1 is at least two, and the end faces of two adjacent energy-absorbing box bodies 1 are fixedly connected and mirror-image arranged along the fixed end face. The end faces of two adjacent energy-absorbing box bodies 1 are fixed by welding, molding or bonding.

[0059] In summary, the processing methods in this scheme include three types;

[0060] The first method uses an integral casting process, employing a mold with pre-processed crease patterns, where the casting material is either a metal or a composite material with good plasticity.

[0061] The second method, considering that the walls of the rotationally symmetrical anti-oblique-pressure impact energy-absorbing box are all expandable, utilizes a pressing process with steel, aluminum, or other metal sheets ranging from 0.5 to 10 mm thick. Specifically, this method involves first processing half or a portion of the energy-absorbing box body 1, also known as a half-shell or partial shell, and then assembling two half-shells or partial shells into the overall energy-absorbing box body 1 structure. After each half-shell or partial shell is formed, they overlap and interlock at their longitudinal edges and are connected to each other by welding, high-strength adhesive, or other methods. To reduce processing costs, the half-shells or partial shells use identical shapes, thus simplifying the production process to require only one type of shell-processing equipment during industrial production.

[0062] The third type uses additive manufacturing technology to 3D print a rotationally symmetric anti-oblique-pressure collision energy-absorbing box.

[0063] Although specific embodiments of the invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by a person skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. A rotationally symmetric anti-oblique-pressure folding paper tube collision energy-absorbing box, characterized in that, It includes at least one energy-absorbing box body (1), the energy-absorbing box body (1) includes a wall that is a planar rectangle when unfolded, the wall is arranged around and adjacent short sides are welded together; Multiple energy-absorbing units are arranged along the surrounding direction on the wall. Each energy-absorbing unit includes a first polygonal origami unit and a second polygonal origami unit with the same structure. Adjacent first polygonal origami units and second polygonal origami units are arranged alternately in the forward and backward directions, respectively. The two first polygonal origami units or the two second polygonal origami units located on the diagonal of the energy-absorbing box body (1) are arranged in rotational symmetry. The forward direction is the vertical upward direction of the wall. The creases between the first polygonal origami unit and the second polygonal origami unit are all peak creases (3). Each of the first polygonal origami units includes at least an isosceles triangular plate (6) and a quadrilateral plate (7) connected from top to bottom, wherein the crease between the bottom edge of the isosceles triangular plate (6) and the top edge of the quadrilateral plate (7) is a valley crease (4), and the quadrilateral plate (7) is in the shape of an isosceles trapezoid or a rectangle.

2. The rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box according to claim 1, characterized in that, Each of the first polygonal origami units includes, from top to bottom, the isosceles triangular plate (6), the quadrilateral plate (7), and the isosceles trapezoidal plate (8) connected to each other, and the crease between the top edge of the isosceles trapezoidal plate (8) and the bottom edge of the quadrilateral plate (7) is a peak crease (3).

3. The rotationally symmetric anti-oblique pressure folding paper tube collision energy-absorbing box according to claim 2, characterized in that, The dimensional relationships of each energy-absorbing unit are as follows: Wherein, a1 and b1 are the top and bottom lengths of the quadrilateral plate (7) in the second polygonal origami unit, respectively; a2 and b2 are the top and bottom lengths of the quadrilateral plate (7) in the first polygonal origami unit, respectively; h1 is the height of the isosceles triangle plate (6) in the first polygonal origami unit and the height of the isosceles trapezoid plate (8) in the second polygonal origami unit; h2 is the height of the quadrilateral plate (7) in the first polygonal origami unit and the height of the quadrilateral plate (7) in the second polygonal origami unit; h3 is the isosceles trapezoid plate in the first polygonal origami unit. (8) Height of the isosceles triangle plate (6) in the second polygon origami unit; H is the height of the energy-absorbing unit and the main body (1) of the energy-absorbing box; α is the folding angle between the isosceles trapezoid plate (8) and the quadrilateral plate (7) in the first polygon origami unit, and the folding angle between the triangle plate and the quadrilateral plate (7) in the second polygon origami unit; β is the folding angle between the quadrilateral plate (7) and the isosceles triangle plate (6) in the first polygon origami unit, and the folding angle between the quadrilateral plate (7) and the isosceles trapezoid plate (8) in the second polygon origami unit.

4. The rotationally symmetric anti-oblique pressure folding paper tube collision energy-absorbing box according to claim 3, characterized in that, In each of the energy-absorbing units, a1 = b1 and a2 = b2.

5. The rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box according to claim 3, characterized in that, In each of the energy-absorbing units, a1>b1 and a2>b2.

6. The rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box according to claim 3, characterized in that, In each of the energy-absorbing units, a2>a1 and b2>a1.

7. The rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box according to claim 1, characterized in that, The number of energy-absorbing box bodies (1) is at least two, and the end faces of two adjacent energy-absorbing box bodies (1) are fixedly connected and mirrored along the fixed end face.

8. The rotationally symmetric anti-oblique-pressure paper tube collision energy-absorbing box according to claim 7, characterized in that, The end faces of two adjacent energy-absorbing box bodies (1) are welded, molded, or bonded together.

Images