Multi-density honeycomb core energy absorption structure and application thereof

Abstract

The invention discloses a multi-density honeycomb core energy absorption structure and application thereof.The energy absorption structure is integrally formed by adjacently arranging a plurality of honeycomb cores, the aperture of each honeycomb core is gradually decreased from the center of the energy absorption structure to the periphery, and the arrangement density of the honeycomb cores is gradually increased from the center of the energy absorption structure to the periphery. The multi-density honeycomb core energy absorption structure is small in middle density and large in periphery density, has the advantages of being good in energy absorption curve stability, small in trigger impact force, stable in curve, high in bending strength and the like, and compared with existing products at present, the multi-density honeycomb core energy absorption structure can effectively improve the compressive strength of unit area. And meanwhile, the cross section density of the energy absorption structure can be changed and adjusted, the size can be customized, and the application range is wider.

Description

Technical Field

[0001] The invention belongs to the technical field of structural materials, and in particular relates to a multi-density honeycomb core energy absorption structure and application thereof. Background Art

[0002] The honeycomb structure has a large strength-to-weight ratio, can meet the requirements of greater strength with a smaller cross-section, and can significantly reduce the weight of the structure itself. Therefore, the honeycomb structure has the advantages of good structural stability, good impact resistance and good buffering performance. The honeycomb panel made with the honeycomb structure as the prototype has good energy absorption, often due to a variety of impact-resistant structures, but the honeycomb panel has poor bending resistance and is prone to lateral bending when squeezed. A honeycomb core energy absorption structure that can effectively prevent lateral bending is proposed. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a multi-density honeycomb core energy absorption structure to solve the above problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-density honeycomb core energy absorption structure, comprising a plurality of honeycomb cores, wherein the aperture of the honeycomb core at the center decreases from the inside to the outside, and the arrangement density of the honeycomb core increases from the inside to the outside.

[0005] On the basis of the above technical solution, the present invention also provides the following optional technical solution:

[0006] A multi-density honeycomb core energy absorption structure, wherein the whole is composed of a plurality of honeycomb cores arranged adjacent to each other, wherein the aperture of the honeycomb core gradually decreases from the center of the energy absorption structure to the surrounding areas, and the arrangement density of the honeycomb core gradually increases from the center of the energy absorption structure to the surrounding areas.

[0007] The multi-density honeycomb core energy absorption structure is composed of multiple layers of honeycomb groups arranged in sequence from the center to the surrounding areas. Each layer of honeycomb groups is composed of multiple honeycomb cores. The honeycomb cores in the same layer of honeycomb groups have the same shape and aperture. The aperture of the honeycomb core of the multi-layer honeycomb group decreases from the inner layer to the outer layer, and the arrangement density of the honeycomb core of the multi-layer honeycomb group gradually increases from the inner layer to the outer layer.

[0008] The multi-density honeycomb core energy absorption structure, wherein the honeycomb group located at the center of the energy absorption structure is circular, and each layer of honeycomb groups surrounding the circular honeycomb group is a corresponding concentric ring, or, the honeycomb group surrounding the center of the energy absorption structure is a regular polygon, and each layer of honeycomb groups surrounding the rectangular honeycomb group is a corresponding regular polygon.

[0009] The multi-density honeycomb core energy absorption structure, wherein the honeycomb core is circular or regular polygonal, and the thickness of the honeycomb core in each layer of honeycomb group is the same.

[0010] The multi-density honeycomb core energy absorption structure is composed of three layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the density ratio from the center layer to the outermost layer is: (0.9-1.1): (1.2-1.3): (1.9-2.1)

[0011] The multi-density honeycomb core energy-absorbing structure is composed of three layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the density ratio from the center layer to the outermost layer is 1:1.2:2.

[0012] The multi-density honeycomb core energy absorption structure is composed of three layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the center layer is a regular hexagonal honeycomb core with a side length of 6 mm and a density of 0.14 g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

[0013] The multi-density honeycomb core energy absorption structure is composed of three layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the ratio of the area occupied by the central layer to the outermost layer of honeycomb groups is 1:3:5.

[0014] The multi-density honeycomb core energy-absorbing structure is characterized in that the multi-layer honeycomb groups are welded into a whole by brazing.

[0015] An application of a multi-density honeycomb core energy-absorbing structure, wherein the structure is used to prepare a load-bearing structure.

[0016] Beneficial Effects

[0017] The present invention provides a multi-density honeycomb core energy absorption structure and its application, which has the following beneficial effects compared with the prior art:

[0018] The energy-absorbing structure of the present invention has a low density in the middle and a high density around it, which brings the characteristics of good stability of the energy-absorbing curve, small triggering impact force, smooth curve, high bending strength, etc. Compared with the existing products, the multi-density honeycomb core energy-absorbing structure of the present invention can effectively improve the compressive strength per unit area. At the same time, the cross-sectional density of the energy-absorbing structure can be changed, adjusted, and customized in size, and has a wider range of adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 3It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0022] Figure 4 It is an enlarged schematic diagram of the connecting rod structure of the present invention.

[0023] Figure 5 It is an enlarged schematic cross-section diagram of the worm structure of the present invention.

[0024] Figure 6 It is a schematic cross-sectional view of the screw structure of the present invention.

[0025] Figure 7 It is an enlarged schematic diagram of the push rod structure of the present invention.

[0026] Figure 8 It is a three-dimensional schematic diagram of the energy absorbing block structure of the present invention.

[0027] Fig. 9 This is a schematic diagram of the bottom of the energy absorbing block of the present invention.

[0028] Fig.10 It is a three-dimensional schematic diagram of the anti-climbing energy absorption structure of the present invention.

[0029] Notes on figure marks: upper base 101, adjustment assembly 2, transmission assembly 3, connecting rod assembly 4, lower base 102, left-handed screw 201, right-handed screw 202, slide 203, connecting rod B204, connecting rod A205, first slide 206, frame 207, honeycomb panel 208, second slide 209, pulley 301, belt 302, main shaft 303, worm 304, worm wheel 305, secondary shaft 306, second worm 307, second worm wheel 401, screw 402, slide 403, push rod A404, push rod B405, slide 406, mounting plate A501, outer cover plate 502, front sealing plate 503, mounting plate B601, outer cover plate B602, partition 603, guide tube 604, anti-climbing teeth 605. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0032] like Figure 1 A multi-density honeycomb core energy absorption structure is shown, wherein the whole is composed of a number of honeycomb cores arranged adjacent to each other, wherein the aperture of the honeycomb core gradually decreases from the center of the energy absorption structure to the surrounding areas, and the arrangement density of the honeycomb core gradually increases from the center of the energy absorption structure to the surrounding areas.

[0033] Preferably, the whole is formed by multi-layer honeycomb groups arranged in sequence from the center to the surroundings, and each layer of honeycomb groups is composed of multiple honeycomb cores. The honeycomb cores in the same layer of honeycomb groups have the same shape and aperture. The aperture of the honeycomb cores of the multi-layer honeycomb groups decreases from the inner layer to the outer layer, and the arrangement density of the honeycomb cores of the multi-layer honeycomb groups gradually increases from the inner layer to the outer layer. The multi-layer honeycomb group structure makes the processing of the energy-absorbing structure practical and feasible. Different layers of honeycomb groups are connected as a whole through processes such as brazing. The arrangement density of the honeycomb cores of the multi-layer honeycomb groups gradually increases from the inner layer to the outer layer. The density of the central honeycomb group is small, and the density of the outer honeycomb group is large, which makes the radial expansion of the energy-absorbing structure small. In addition, the outer side density of the multi-density honeycomb core energy-absorbing structure is large, and the bending resistance is good, which solves the problem of low bending resistance of single-density energy-absorbing blocks.

[0034] The shape of the honeycomb group is preferably a regular shape, that is, it is centrally symmetrical with the geometric center of the energy absorbing structure as the symmetry center, and other layers of regular-shaped honeycomb groups are also centrally symmetrical with the geometric center of the energy absorbing structure as the symmetry center. For example, in the preferred embodiment, the honeycomb group located at the center of the energy absorbing structure is circular, and each layer of honeycomb groups surrounding the circular honeycomb group is a corresponding concentric ring, or the honeycomb group surrounding the center of the energy absorbing structure is a regular polygon, and each layer of honeycomb groups surrounding the rectangular honeycomb group is a corresponding regular polygon. The honeycomb group of regular shape can ensure that the mechanical properties of the energy absorbing structure are the same in all directions, thereby achieving a stable and reliable structure.

[0035] The honeycomb core is preferably a regular hollow shape, which can ensure the structural stability of the honeycomb core itself. Preferably, the honeycomb core is circular or regular polygonal, for example, a regular hexagon is used to imitate the shape of a honeycomb, and the best material is used to provide a high structural strength. In addition, it is necessary to ensure that the thickness of the honeycomb core in each layer of honeycomb group is the same, which is conducive to processing and can ensure that the honeycomb group in the same layer has excellent structural strength.

[0036] like Figure 1 The preferred embodiment shown is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the density ratio from the center layer to the outermost layer is: (0.9-1.1):(1.2-1.3):(1.9-2.1). The honeycomb groups are determined to be 3 groups, which is the minimum number of layers that can provide excellent anti-bending performance, taking into account both the realization of anti-bending performance and low processing cost.

[0037] Furthermore, the whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surroundings, wherein the density ratio from the center layer to the outermost layer is 1:1.2:2. Under this ratio, the energy-absorbing structure has excellent anti-bending performance. More layers of honeycomb groups will increase the difficulty and cost of processing materials, and at the same time, its mechanical properties will not be greatly improved.

[0038] In the best embodiment, the whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surroundings, wherein the center layer is a regular hexagonal honeycomb core with a side length of 6 mm and a density of 0.14 g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 The strength of the energy-absorbing structure of the present invention is described below through examples.

[0039] Once the side length of the honeycomb core is determined, the density of the honeycomb is determined. For example, the thickness of the aluminum foil is 0.2mm, the side length is 5mm, and the density of the regular hexagonal honeycomb core is 0.2g / cm 3

[0040] The experimental basis for compressive performance: GB / T 1453-2005 "Test method for flat compression performance of sandwich structures"

[0041] The test basis for bending performance: GB / T1456-2005 "Test method for bending performance of sandwich structures"

[0042] The experimental group can increase the comparison test by changing the side length of the honeycomb. By changing the side length of the hexagon, the density of the honeycomb changes accordingly. The thickness of the honeycomb aluminum foil is set to 0.2mm and the thickness of the honeycomb is 25mm:

[0043] Example 1

[0044] Experimental group 1: It is composed of 3 layers of honeycomb groups arranged in a circle from the center to the surroundings. The center layer is a regular hexagonal honeycomb core with a side length of 6mm and a density of 0.14g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

[0045] Experimental group 2: It is composed of 3 layers of honeycomb groups arranged in a circle from the center to the surroundings. The center layer is a regular hexagonal honeycomb core with a side length of 8mm and a density of 0.1g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 6 mm and a honeycomb core density of 0.14 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

[0046] Experimental group 3: It is composed of 3 layers of honeycomb groups arranged in a circle from the center to the surroundings. The center layer is a regular hexagonal honeycomb core with a side length of 8mm and a density of 0.1g / cm3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

[0047] Experimental group 4: It is composed of 2 layers of honeycomb groups arranged in a circle from the center to the surroundings. The center layer is a regular hexagonal honeycomb core with a side length of 6mm and a density of 0.14g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 .

[0048] Experimental group 5: It is composed of 2 layers of honeycomb groups arranged in a circle from the center to the surroundings. The center layer is a regular hexagonal honeycomb core with a side length of 6mm and a density of 0.14g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

[0049] Control group 1: The whole is composed of a regular hexagonal honeycomb core with a side length of 6 mm.

[0050] Control group 2: The whole is composed of a regular hexagonal honeycomb core with a side length of 3 mm.

[0051] The experimental results are shown in the following table:

[0052] Group Compressive strength MPa Bending performance MPa Experimental Group 1 6.11 159.3 Experimental Group 2 5.45 141 Experimental Group 3 5.74 149.6 Experimental Group 4 4.8 133.7 Experimental Group 5 6.5 152.4 Control group 1 4.36 127.3 Control group 2 8.73 173.5

[0053] It can be seen from the results that the outer side density of the energy-absorbing structure of the present invention is large and the bending resistance is good. Compared with the single-density energy-absorbing block, its bending resistance is significantly improved. The energy-absorbing structure of the present invention solves the problem of the energy-absorbing structure falling sideways when compressed by designing different densities. The energy-absorbing structure of the present invention is brazed as a whole, and the structure is stable and reliable, and the brazing node strength is high. The energy-absorbing structure of the present invention is an aluminum honeycomb hollow structure with low density in the central area and high density around it, and the radial expansion of the product is small. The energy-absorbing structure of the present invention has the characteristics of stable force value, designable trigger force and platform compression force, and high axial bending strength.

[0054] In another preferred embodiment, the whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surroundings, wherein the area ratio of the area occupied by the center layer to the outermost honeycomb group is 1:3:5. The area size determines the structural performance and mechanical properties of the final energy-absorbing structure as a whole. Since it is composed of multiple layers of different honeycomb groups, it is necessary to verify the area size of each layer of honeycomb groups. The strength of the energy-absorbing structure of the present invention is described below through examples.

[0055] Taking a 3-layer honeycomb group and a determined honeycomb side length as an example, the honeycomb specifications are: the 3-layer honeycomb group is arranged in a circle from the center to the surroundings, wherein the center layer is a regular hexagonal honeycomb core with a side length of 6mm; the second layer is a regular hexagonal honeycomb core with a side length of 5mm; and the third layer is a regular hexagonal honeycomb core with a side length of 3mm. The area ratio of the center layer, the second layer, and the third layer is changed for experimental verification.

[0056] Example 2

[0057] Experimental group 1: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the central layer to the outermost layer of honeycomb groups is 1:3:5.

[0058] Experimental group 2: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the central layer to the outermost layer of honeycomb groups is 1:5:3.

[0059] Experimental group 3: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the central layer to the outermost layer of honeycomb groups is 3:1:5.

[0060] Experimental group 4: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the central layer to the outermost layer of honeycomb groups is 3:5:1.

[0061] Experimental group 5: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the center layer to the outermost layer of honeycomb groups is 5:3:1.

[0062] Experimental group 6: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the area ratio of the center layer to the outermost layer of honeycomb groups is 5:1:3.

[0063] Control group 1: It is composed of the central layer honeycomb group in experimental group 1.

[0064] Control group 2: It is composed of the outermost honeycomb group in experimental group 1.

[0065] The experimental results are shown in the following table:

[0066] Group Compressive strength MPa Bending performance MPa Experimental Group 1 7.08 186.9 Experimental Group 2 6.3 166.3 Experimental Group 3 6.8 179.5 Experimental Group 4 5.33 140.7 Experimental Group 5 5.14 135.6 Experimental Group 6 5.9 155.7 Control group 1 4.36 127.3 Control group 2 8.73 173.5

[0067] The energy-absorbing structure of the present invention has a large outer density and good bending resistance. Compared with a single-density energy-absorbing block, its bending resistance is significantly improved. The energy-absorbing structure of the present invention solves the problem of the energy-absorbing structure falling sideways when compressed by designing different densities. The energy-absorbing structure of the present invention is brazed as a whole, and the structure is stable and reliable, and the brazing node strength is high. The energy-absorbing structure of the present invention is an aluminum honeycomb hollow structure with a low density in the center area and a high density around it, resulting in a small radial expansion of the product. The energy-absorbing structure of the present invention has the characteristics of stable force value, designable trigger force and platform compression force, and high axial bending strength.

[0068] The multi-density honeycomb core energy-absorbing structure is characterized in that the multi-layer honeycomb groups are welded into a whole by brazing.

[0069] Since the structure has low density in the middle and high density around, it has the characteristics of good stability of energy absorption curve, small triggering impact force, smooth curve, high bending strength, etc. Variable density honeycomb blocks can meet the energy absorption requirements of different application scenarios under limited space and weight requirements.

[0070] In the embodiment of the present invention, the cross section of the multi-density honeycomb core can be a regular shape such as a square, a rectangle, or a circle. The honeycomb core structure with different densities is arranged in the cross section, the honeycomb core is sparsely arranged in the center, and the density increases gradually toward the surroundings, and the density change increases in a gradient. By not changing the material thickness of the honeycomb core, the size of the honeycomb core aperture is mainly changed to adjust the density of the honeycomb core. By designing the density distribution of the hexagonal grid, the compressive strength of the material can be effectively improved, and an ideal force-deformation curve can be obtained. Each layer of honeycomb core is arranged in sequence. This scheme changes the density arrangement of the honeycomb core, improves the compressive strength per unit area with less weight increase, and improves the deformation stability and guidance, improves the ability to resist lateral bending, solves the problem of large radial expansion during the compression process of the honeycomb core, and by setting honeycomb panels with decreasing density in sequence, the honeycomb core has a larger deformation space inside, thereby reducing the radial expansion caused by the deformation of the honeycomb core with larger density on the outside.

[0071] The present invention also provides an application of a multi-density honeycomb core energy-absorbing structure, wherein the structure is applied to prepare a load-bearing structure. Figure 2-7 , provided in one embodiment of the present invention, is a load-bearing structure using a multi-density honeycomb core energy-absorbing structure, comprising an upper base 101 and a lower base 102, and further comprising:

[0072] Adjusting component 2, for adjusting the spacing between the energy absorbing honeycomb panels;

[0073] The adjusting assembly 2 comprises a left-handed screw 201, a right-handed screw 202 and a slide 203. One end of the left-handed screw 201 is rotatably connected to the upper base 101, and the other end of the left-handed screw 201 is fixedly connected to the right-handed screw 202. The other end of the right-handed screw 202 is rotatably connected to the upper base 101. The left-handed screw 201 and the left-handed screw 201 are respectively threadedly connected with a slide 203. The two slides 203 are slidably connected to the upper base 101, and the right-handed screw 202 is connected to the transmission assembly 3.

[0074] Specifically, the upper base 101 is slidably connected with a plurality of frames 207, the frames 207 are provided with slide rails, the slide rails are slidably connected with a first slide 206 and a second slide 209, rubber strips are provided at the sliding connections between the first slide 206 and the second slide 209 and the frames 207, and the plurality of frames 207 are detachably and fixedly connected with honeycomb panels 208.

[0075] Specifically, the honeycomb panel 208 is a mesh honeycomb structure, and is provided with a plurality of hollow hexagonal structures welded from energy-absorbing materials, and the diameter of the hexagonal structures gradually decreases from the outside to the inside.

[0076] Specifically, the upper and lower ends of the first slide 206 are respectively hinged with a connecting rod B204 and a connecting rod A205, the connecting rod A205 is hinged to the slide 203 threadedly connected to the right-hand screw 202, and the connecting rod B204 is hinged to the second slide 209 slidably connected in the upper frame 207.

[0077] Specifically, the second slide 209 is hinged with a connecting rod A205 and a connecting rod B204 at the upper and lower ends respectively. The connecting rod B204 is hinged to the slide 203 threadedly connected to the left-handed screw 201, and the connecting rod A205 is hinged to the first slide 206 slidably connected in the upper frame 207.

[0078] In the embodiment of the present invention, the relevant technicians install multiple honeycomb panels 208 on the frame 207 respectively, and adjust the spacing between the frames 207 as needed. At this time, the relevant technicians control the left-hand screw 201 to start rotating, so that the left-hand screw 201 drives the right-hand screw 202 fixedly connected thereto to start rotating synchronously, so that the slide cylinder 203 threadedly connected on the left-hand screw 201 and the right-hand screw 202 starts to perform linear motion synchronously along the sliding connection with the upper base 101, so that the two slide cylinders 203 drive the connecting rod B204 and the connecting rod A205 hinged thereto to start rotating. The first slide 206 and the second slide 209 are hinged at the other ends of the connecting rod A205 and the connecting rod B204, and start to move linearly in opposite directions, so that the first slide 206 and the second slide 209 move in opposite directions along the slide groove on the frame 207, and the frame 207 starts to rise at a uniform speed. At the same time, the first slide 206 and the second slide 209 respectively drive the connecting rod B204 and the connecting rod A205 hinged thereon to start synchronous movement, so that multiple frames 207 start to rise synchronously, thereby adjusting their spacing so as to give full play to the energy absorption effect of the honeycomb panel 208.

[0079] See also Figure 2-7 As an embodiment of the present invention, the transmission assembly 3 includes a pulley 301, a belt 302 and a main shaft 303. The pulley 301 is fixedly connected to the right-hand screw 202 on the right-hand screw 202. The belt 302 is transmission-connected to the pulley 301. The other end of the belt 302 is transmission-connected to the main shaft 303 through the pulley on the main shaft 303. The main shaft 303 is rotationally connected to the upper base 101.

[0080] Specifically, a worm 304 is fixedly connected to the main shaft 303, a worm wheel 305 is meshingly connected to one side of the worm 304, a secondary shaft 306 is fixedly connected at the axis of the worm wheel 305, the secondary shaft 306 is rotatably connected to the upper base 101, a second worm 307 is fixedly connected to the secondary shaft 306, and the second worm 307 is connected to the connecting rod assembly 4.

[0081] Specifically, the connecting rod assembly 4 includes a second worm gear 401, a screw 402 and a slide 403. The second worm gear 401 is meshingly connected with the second worm 307. The screw 402 is fixedly connected to the axis of the second worm gear 401. The screw 402 is rotatably connected to the upper base 101 in the groove of the upper base 101. The slide 403 is threadedly connected to the screw 402. The slide 403 is slidably connected to the upper base 101 through the groove on the upper base 101.

[0082] Specifically, a push rod A404 is hinged on the slide cylinder 403, and the other end of the push rod A404 is hinged to the lower base 102 through a hinge seat on the lower base 102. The lower base 102 is slidably connected to the slide 406 through its upper slide rail. A push rod B405 is hinged on the slide 406, and the push rod B405 is rotatably connected to the push rod A404 through rivets thereon. The other end of the push rod B405 is hinged to the upper base 101.

[0083] In the embodiment of the present invention, when the lateral spacing between the plurality of honeycomb panels 208 needs to be adjusted, the right-handed screw 202 is controlled to rotate to drive the pulley 301 fixed thereon to start to rotate synchronously, so that the pulley 301 drives the belt 302 connected thereto to start to rotate synchronously, so that the belt 302 drives the main shaft 303 connected thereto to start to rotate, so that the main shaft 303 drives the worm 304 fixed thereto to start to rotate synchronously, so that the worm 304 drives the worm wheel 305 meshing therewith to start to rotate, so that the worm wheel 305 drives the secondary shaft 306 fixed at its axis to start to rotate, so that the secondary shaft 306 drives the second worm 307 fixed at its other end to start to rotate, so that the second worm 307 drives the second worm gear 401 meshingly connected thereon to start rotating, thereby the second worm gear 401 drives the screw 402 fixedly connected at its axis to start rotating, thereby the screw 402 drives the slide 403 threadedly connected thereon to start linear motion along the guide rail on the upper base 101 slidably connected thereto, thereby the slide 403 drives the top rod A404 hinged thereto to start synchronous linear motion, thereby the top rod B405 drives the slide 406 hinged thereto to start linear motion along the slide rail at the sliding connection between it and the lower base 102, thereby the lower base 102 is pushed to start linear motion with the cooperation of the top rod B405 and the top rod A404, thereby adjusting the lateral spacing between the multiple honeycomb panels 208.

[0084] See also Figures 8-9 , provided as an embodiment of the present invention, is a protective structure using a multi-density honeycomb core energy absorption structure, comprising an outer cover plate 502, a front sealing plate 503 and a mounting plate A501, wherein the outer cover plate 502 is fixedly connected to the mounting plate A501, and a plurality of threaded holes are provided on the mounting plate A501, the purpose of which is to facilitate the installation and fixing of the device at a corresponding position; the cross-section of the outer cover plate 502 is an isosceles trapezoid, the purpose of which is to enable the device to be evenly stressed when impacted; the front sealing plate 503 is detachably fixedly mounted on the upper end of the outer cover plate 502.

[0085] In an embodiment of the present invention, relevant technicians fill a plurality of honeycomb panels into the outer cover panel 502, wherein the honeycomb panels may be honeycomb panels with different densities in the upper and lower layers or each layer may be a honeycomb panel with different density structures, and fix the device at a predetermined position, so as to absorb the impact force when hit and protect the target facility to the maximum extent.

[0086] See also Fig.10 , provided as an embodiment of the present invention, is a multi-density honeycomb core energy absorption structure, comprising a mounting plate B601, an outer cover plate B602, a partition 603, a guide tube 604 and an anti-climbing tooth 605, wherein the outer cover plate B602 is fixedly connected to the mounting plate B601, a plurality of partitions 603 are detachably and fixedly connected to the outer cover plate B602, a honeycomb panel is filled between any two partitions 603, a guide tube 604 is fixedly connected between the plurality of partitions 603, an anti-climbing tooth 605 is fixedly connected to the top of the guide tube 604, and the anti-climbing tooth 605 is fixedly connected to the outer cover plate B602.

[0087] In the embodiment of the present invention, relevant technicians fix the structure at a predetermined position through the mounting plate B601. When the structure is hit, the honeycomb panels filled between the partitions 603 and 603 are deformed step by step during compression, thereby absorbing energy to the maximum extent. The guide tubes 604 between the partitions 603 can play a guiding role, thereby preventing the structure from falling sideways.

[0088] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-density honeycomb core energy absorption structure, characterized in that: The whole is composed of a number of honeycomb cores arranged adjacent to each other, wherein the aperture of the honeycomb core gradually decreases from the center of the energy absorption structure to the surrounding areas, and the arrangement density of the honeycomb core gradually increases from the center of the energy absorption structure to the surrounding areas.

2. The multi-density honeycomb core energy absorption structure according to claim 1, characterized in that: The whole is composed of multi-layer honeycomb groups arranged in sequence from the center to the surroundings, each layer of honeycomb groups is composed of multiple honeycomb cores, the honeycomb cores in the same layer of honeycomb groups have the same shape and aperture, the aperture of the honeycomb cores of the multi-layer honeycomb groups decreases from the inner layer to the outer layer, and the arrangement density of the honeycomb cores of the multi-layer honeycomb groups gradually increases from the inner layer to the outer layer.

3. The multi-density honeycomb core energy absorption structure according to claim 2, characterized in that: The honeycomb group located at the center of the energy absorbing structure is circular, and the layers of honeycomb groups surrounding the circular honeycomb group are corresponding concentric rings. Alternatively, the honeycomb group surrounding the center of the energy absorbing structure is a regular polygon, and the layers of honeycomb groups surrounding the rectangular honeycomb group are corresponding regular polygons.

4. The multi-density honeycomb core energy absorption structure according to claim 2, characterized in that: The honeycomb core is circular or regular polygonal, and the thickness of the honeycomb core in each layer of honeycomb groups is the same.

5. The multi-density honeycomb core energy absorption structure according to claim 2, characterized in that: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, wherein the density ratio from the center layer to the outermost layer is: (0.9-1.1):(1.2-1.3):(1.9-2.1).

6. The multi-density honeycomb core energy absorption structure according to claim 5, characterized in that: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surrounding areas, among which the density ratio from the center layer to the outermost layer is 1:1.2:

2.

7. The multi-density honeycomb core energy absorption structure according to claim 6, characterized in that: The whole is composed of 3 layers of honeycomb groups arranged in sequence from the center to the surroundings. Among them, the central layer is a regular hexagonal honeycomb core with a side length of 6mm and a density of 0.14g / cm 3 The second layer is a regular hexagonal honeycomb core with a side length of 5 mm and a honeycomb core density of 0.17 g / cm 3 The third layer is a regular hexagonal honeycomb core with a side length of 3 mm and a honeycomb core density of 0.28 g / cm 3 .

8. The multi-density honeycomb core energy absorption structure according to claim 2, characterized in that: The whole is composed of 3 layers of honeycomb groups which are arranged in sequence from the center to the surrounding areas, wherein the area ratio of the honeycomb groups from the center layer to the outermost layer is 1:3:

5.

9. The multi-density honeycomb core energy absorption structure according to claim 2, characterized in that: The multi-layer honeycomb group is welded into a whole by brazing.

10. An application of a multi-density honeycomb core energy absorption structure, characterized in that: Used in the preparation of load-bearing structures.

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