Reinforced hexagonal lattice structure

Abstract

The application discloses a reinforced hexagonal lattice structure, and belongs to the technical field of aerospace impact buffering devices. In order to solve the defects of the soft landing buffering capacity of a traditional lander mainly adopting a honeycomb thin-walled tube structure, the lattice structure comprises a plurality of reinforced hexagonal lattice structure cell layers, the reinforced hexagonal lattice structure cell layers are sequentially arranged from top to bottom, and adjacent two reinforced hexagonal lattice structure cell layers are fixedly connected. Each reinforced hexagonal lattice structure cell layer comprises a plurality of reinforced hexagonal lattice structure cells, the plurality of reinforced hexagonal lattice structure cells are distributed in a rectangular array, and adjacent two reinforced hexagonal lattice structure cells are fixedly connected. The application is mainly used as a buffering structure of a lander in the field of aerospace.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aerospace impact cushioning devices, and particularly relates to a reinforced hexagonal lattice structure. BACKGROUND

[0002] The lattice structure is a kind of periodic arrangement structure composed of bars and nodes inspired by metal lattice structure, which has excellent energy absorption capacity and light weight. This kind of structure has great application potential in the field of aerospace landing cushioning, which aims to reduce the impact force by deforming the structure to absorb energy when collision, impact or vibration occurs, so as to protect the cabin passengers and equipment from damage or injury.

[0003] Under the same material, the structure shape of the lattice is closely related to its energy absorption capacity, and the proposal of the new lattice structure and the energy absorption mechanism and optimization design of the lattice structure under impact load are of great significance to improve the soft landing cushioning capacity of the lander. At present, the traditional landing cushioning device relying on structural deformation to absorb energy is mainly based on honeycomb thin-walled tube structure. The honeycomb thin-walled tube is filled in the landing leg of the lander to achieve the purpose of cushioning, and this traditional energy absorption method has the following defects:

[0004] First, the collision force is too large in the initial stage of cushioning, which is easy to cause impact damage;

[0005] Second, the bonding state between the thin-walled tubes is easy to fail due to temperature, humidity and other environmental factors, which reduces the reliability;

[0006] Third, the lateral impact cushioning capacity is poor;

[0007] Fourth, the manufacturing material is relatively single;

[0008] Therefore, it is very practical to develop a reinforced hexagonal lattice cushioning structure for the above problems. SUMMARY

[0009] The application is developed to solve the defects of the traditional landing cushioning device mainly based on honeycomb thin-walled tube structure, and further provides a reinforced hexagonal lattice structure;

[0010] A reinforced hexagonal lattice structure, the lattice structure comprises a plurality of reinforced hexagonal lattice structure cell layers, the plurality of reinforced hexagonal lattice structure cell layers are sequentially arranged from top to bottom, and adjacent two reinforced hexagonal lattice structure cell layers are fixedly connected, each reinforced hexagonal lattice structure cell layer comprises a plurality of reinforced hexagonal lattice structure cells, the plurality of reinforced hexagonal lattice structure cells are distributed in the form of a rectangular array, and adjacent two reinforced hexagonal lattice structure cells are fixedly connected.

[0011] The reinforced hexagonal lattice cell comprises two two-dimensional reinforced hexagonal structures which are distributed in a cross shape and integrally formed, each of the two-dimensional reinforced hexagonal structures comprises a hexagonal outer frame, a reinforcing unit, a first horizontal connecting rod and a second horizontal connecting rod, the reinforcing unit is arranged in the hexagonal outer frame and fixedly connected with the inner wall of the hexagonal outer frame, the first horizontal connecting rod and the second horizontal connecting rod are oppositely arranged on two sides of the hexagonal outer frame, the extension direction of the first horizontal connecting rod is the same as that of the second horizontal connecting rod, the length of the first horizontal connecting rod is the same as that of the second horizontal connecting rod, one end of the first horizontal connecting rod is fixedly connected with the connection position of two adjacent frame edges in the hexagonal outer frame, the other end of the first horizontal connecting rod is fixedly connected with the other end of the second horizontal connecting rod in the adjacent two-dimensional reinforced hexagonal structure, one end of the second horizontal connecting rod is fixedly connected with the connection position of the two adjacent frame edges of the hexagonal outer frame, and the other end of the second horizontal connecting rod is fixedly connected with the other end of the first horizontal connecting rod in the adjacent two-dimensional reinforced hexagonal structure.

[0012] Further, the hexagonal outer frame comprises a first inclined outer support rod, a first horizontal support rod, a second inclined outer support rod, a third inclined outer support rod, a second horizontal support rod and a fourth inclined outer support rod, the first inclined outer support rod, the first horizontal support rod, the second inclined outer support rod, the third inclined outer support rod, the second horizontal support rod and the fourth inclined outer support rod are sequentially and fixedly connected to form the hexagonal outer frame, the length of the first horizontal support rod is the same as that of the second horizontal support rod, the length of the first inclined outer support rod, the length of the second inclined outer support rod, the length of the third inclined outer support rod and the length of the fourth inclined outer support rod are the same, one end of the first horizontal connecting rod is fixedly connected with the connection position of the second inclined outer support rod and the third inclined outer support rod, and one end of the second horizontal connecting rod is fixedly connected with the connection position of the first inclined outer support rod and the fourth inclined outer support rod.

[0013] Further, the included angle between the first inclined outer support rod, the second inclined outer support rod, the third inclined outer support rod and the fourth inclined outer support rod and the inner side of the y-axis direction is γ.

[0014] Further, the value range of γ is 10°-80°.

[0015] Further, the value range of γ is 40°-60°.

[0016] Further, the reinforcing unit comprises a first inclined inner support rod, a second inclined inner support rod, a third inclined inner support rod and a fourth inclined inner support rod, the first inclined inner support rod, the second inclined inner support rod, the third inclined inner support rod and the fourth inclined inner support rod are arranged between the first horizontal support rod and the second horizontal support rod, the first inclined inner support rod and the second inclined inner support rod are arranged below the first horizontal support rod along the center line of the length direction of the first horizontal support rod, and the top end of the first inclined inner support rod and the top end of the second inclined inner support rod are fixedly connected with the first horizontal support rod, the third inclined inner support rod is arranged below the second inclined inner support rod, and the third inclined inner support rod and the second inclined inner support rod are arranged symmetrically along the axis of the second horizontal connecting rod, the top end of the third inclined inner support rod is fixedly connected with the bottom end of the second inclined inner support rod, and the bottom end of the third inclined inner support rod is fixedly connected with the second horizontal support rod, the fourth inclined inner support rod is arranged below the first inclined inner support rod, and the fourth inclined inner support rod and the first inclined inner support rod are arranged symmetrically along the axis of the first horizontal connecting rod, the top end of the fourth inclined inner support rod is fixedly connected with the bottom end of the first inclined inner support rod, and the bottom end of the fourth inclined inner support rod is fixedly connected with the second horizontal support rod, and the third inclined inner support rod and the fourth inclined inner support rod are arranged symmetrically along the center line of the length direction of the second horizontal support rod;

[0017] Further, the top end of the first inclined inner support rod is connected with the first horizontal support rod at a quarter of the length, the top end of the second inclined inner support rod is connected with the first horizontal support rod at three quarters of the length, the bottom end of the fourth inclined inner support rod is connected with the second horizontal support rod at a quarter of the length, and the bottom end of the third inclined inner support rod is connected with the second horizontal support rod at three quarters of the length.

[0018] Further, the length of the first inclined inner support rod, the length of the second inclined inner support rod, the length of the third inclined inner support rod and the length of the fourth inclined inner support rod are the same, the included angle between the first inclined inner support rod, the second inclined inner support rod, the third inclined inner support rod and the fourth inclined inner support rod and the inner side of the y-axis direction is the same and is θ, and the value range of θ is 10°-60°.

[0019] Further, the value range of θ is 20°-40°.

[0020] Further, the rod section of the first inclined outer support rod, the rod section of the first inclined inner support rod, the rod section of the first horizontal support rod, the rod section of the second inclined inner support rod, the rod section of the second inclined outer support rod, the rod section of the first horizontal connecting rod, the rod section of the third inclined outer support rod, the rod section of the third inclined inner support rod, the rod section of the second horizontal support rod, the rod section of the fourth inclined inner support rod, the rod section of the fourth inclined outer support rod and the rod section of the second horizontal connecting rod are all square and have the same area.

[0021] The application has the following advantages over the prior art:

[0022] The reinforced hexagonal lattice structure provided by the application has the following advantages over the conventional landing buffer device that relies on the deformation of the honeycomb thin-walled tube structure to absorb energy:

[0023] First, the buffer performance of the reinforced hexagonal lattice structure provided by the application is more controllable. By adjusting the size relationship between the rod members, the peak collision stress in the initial stage of the buffer can be greatly reduced, the buffer stability is improved, and the risk of damage to the precision instruments carried by the lander due to excessive collision stress in the initial stage of the buffer is reduced.

[0024] Second, the reinforced hexagonal lattice structure provided by the application is an integrated structure obtained by wire cutting or metal 3D printing. Compared with the glued state between the thin-walled tubes, it has stronger stability and is less affected by temperature, humidity and other environmental factors in unknown landing environments, thereby reducing the reliability of the buffer capacity. Moreover, this structure does not require the introduction of new connecting components during preparation, so it has a lighter mass compared to the buffer structure in the conventional lander, which is more conducive to reducing the overall mass of the aerospace and aviation aircraft.

[0025] Third, the reinforced hexagonal lattice structure provided by the application has stronger lateral impact buffering capacity by optimizing the structure of the individual cell, and does not strictly require the impact direction to be the positive axis. Compared with the conventional landing buffer device, it can provide a more stable buffering process.

[0026] Fourth, the individual cell in the reinforced hexagonal lattice structure provided by the application is an integrated structure obtained by wire cutting or metal 3D printing, which makes the manufacturing material selection more diverse, including metals, ceramics and composite materials, etc., greatly increasing the application potential of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a perspective view of the reinforced hexagonal lattice structure described in the application;

[0028] Figure 2Front view of the reinforced hexagonal lattice structure according to the present application;

[0029] Figure 3 Top view of the reinforced hexagonal lattice structure according to the present application;

[0030] Figure 4 Axonometric view of the reinforced hexagonal lattice cell according to the present application;

[0031] Figure 5 Front view of the reinforced hexagonal lattice cell according to the present application;

[0032] Figure 6 Top view of the reinforced hexagonal lattice cell according to the present application;

[0033] Figure 7 Axonometric view of the two-dimensional reinforced hexagonal structure according to the present application;

[0034] Figure 8 Dimensional parameter view of the two-dimensional reinforced hexagonal structure according to the present application;

[0035] Figure 9 Impact working condition view of the reinforced hexagonal lattice structure according to the present application;

[0036] Figure 10 Front view of the impact working condition of the reinforced hexagonal lattice structure according to the present application;

[0037] Figure 11 View of the reinforced hexagonal lattice structure according to the second size combination according to the present application;

[0038] Figure 12 View of the variation of the diagonal strut angle θ within the cell according to the present application;

[0039] Figure 13 Impact force-displacement graph of the structure corresponding to the variation of the diagonal strut angle θ within the cell according to the present application;

[0040] Figure 14 Buffering performance index graph of the structure corresponding to the variation of the diagonal strut angle θ within the cell according to the present application;

[0041] Figure 15 View of the variation of the diagonal strut angle γ outside the cell according to the present application;

[0042] Figure 16 Impact force-displacement graph of the structure corresponding to the variation of the diagonal strut angle γ outside the cell according to the present application;

[0043] Figure 17 Buffering performance index graph of the structure corresponding to the variation of the diagonal strut angle γ outside the cell according to the present application;

[0044] The first inclined outer support rod 1, the first inclined inner support rod 2, the first horizontal support rod 3, the second inclined inner support rod 4, the second inclined outer support rod 5, the first horizontal connecting rod 6, the third inclined outer support rod 7, the third inclined inner support rod 8, the second horizontal support rod 9, the fourth inclined inner support rod 10, the fourth inclined outer support rod 11, and the second horizontal connecting rod 12 shown in FIG. 1. DETAILED DESCRIPTION

[0045] DETAILED DESCRIPTION Figures 1 to 17 In this embodiment, a reinforced hexagonal lattice structure is provided, which includes a plurality of reinforced hexagonal lattice structure cell layers arranged from top to bottom, and adjacent two reinforced hexagonal lattice structure cell layers are fixedly connected. Each reinforced hexagonal lattice structure cell layer includes a plurality of reinforced hexagonal lattice structure cells, which are distributed in a rectangular array and adjacent two reinforced hexagonal lattice structure cells are fixedly connected.

[0046] The reinforced hexagonal lattice cell includes two two-dimensional reinforced hexagonal structures, which are distributed in a cross shape and integrally formed. Each two-dimensional reinforced hexagonal structure includes a hexagonal outer frame, a reinforcing unit, a first horizontal connecting rod 6, and a second horizontal connecting rod 12. The reinforcing unit is arranged in the hexagonal outer frame and fixedly connected with the inner wall of the hexagonal outer frame. The first horizontal connecting rod 6 and the second horizontal connecting rod 12 are arranged on opposite sides of the hexagonal outer frame. The extension direction of the first horizontal connecting rod 6 is the same as that of the second horizontal connecting rod 12, and the length of the first horizontal connecting rod 6 is the same as that of the second horizontal connecting rod 12. One end of the first horizontal connecting rod 6 is fixedly connected with the connection between two adjacent frame edges of the hexagonal outer frame, and the other end of the first horizontal connecting rod 6 is fixedly connected with the other end of the second horizontal connecting rod 12 in the adjacent two-dimensional reinforced hexagonal structure. One end of the second horizontal connecting rod 12 is fixedly connected with the connection between two adjacent frame edges of the hexagonal outer frame, and the other end of the second horizontal connecting rod 12 is fixedly connected with the other end of the first horizontal connecting rod 6 in the adjacent two-dimensional reinforced hexagonal structure.

[0047] DETAILED DESCRIPTION Figures 1 to 17The embodiment is different from the first embodiment in that the hexagonal outer frame comprises a first inclined outer support rod 1, a first horizontal support rod 3, a second inclined outer support rod 5, a third inclined outer support rod 7, a second horizontal support rod 9 and a fourth inclined outer support rod 11, the first inclined outer support rod 1, the first horizontal support rod 3, the second inclined outer support rod 5, the third inclined outer support rod 7, the second horizontal support rod 9 and the fourth inclined outer support rod 11 are sequentially and fixedly connected to form a hexagonal outer frame, the length of the first horizontal support rod 3 is the same as the length of the second horizontal support rod 9, the length of the first inclined outer support rod 1 is the same as the length of the second inclined outer support rod 5, the length of the third inclined outer support rod 7 is the same as the length of the fourth inclined outer support rod 11, one end of the first horizontal connecting rod 6 is fixedly connected to the connection between the second inclined outer support rod 5 and the third inclined outer support rod 7, and one end of the second horizontal connecting rod 12 is fixedly connected to the connection between the first inclined outer support rod 1 and the fourth inclined outer support rod 11. The other components and connection modes are the same as those in the first embodiment.

[0048] The third embodiment is combined with the first embodiment. Figures 1 to 17 The embodiment is different from the second embodiment in that the first inclined outer support rod 1, the second inclined outer support rod 5, the third inclined outer support rod 7 and the fourth inclined outer support rod 11 have the same angle γ with the inner side of the y-axis direction. The other components and connection modes are the same as those in the second embodiment.

[0049] The fourth embodiment is combined with the third embodiment. Figures 1 to 17 The embodiment is different from the third embodiment in that the value range of γ is 10°-80°. The other components and connection modes are the same as those in the third embodiment.

[0050] The fifth embodiment is combined with the fourth embodiment. Figures 1 to 17 The embodiment is different from the fourth embodiment in that the value range of γ is 40°-60°. The other components and connection modes are the same as those in the fourth embodiment.

[0051] The sixth embodiment is combined with the fifth embodiment. Figures 1 to 17The embodiment is described. The embodiment is different from the fifth specific embodiment in that the reinforcing unit comprises a first inclined inner support rod 2, a second inclined inner support rod 4, a third inclined inner support rod 8 and a fourth inclined inner support rod 10, the first inclined inner support rod 2, the second inclined inner support rod 4, the third inclined inner support rod 8 and the fourth inclined inner support rod 10 are arranged between the first horizontal support rod 3 and the second horizontal support rod 9, the first inclined inner support rod 2 and the second inclined inner support rod 4 are arranged below the first horizontal support rod 3 along the center line of the length direction of the first horizontal support rod 3, and the top end of the first inclined inner support rod 2 and the top end of the second inclined inner support rod 4 are fixedly connected with the first horizontal support rod 3, the third inclined inner support rod 8 is arranged below the second inclined inner support rod 4, and the third inclined inner support rod 8 is arranged symmetrically with the second inclined inner support rod 4 along the axis of the second horizontal connecting rod 12, the top end of the third inclined inner support rod 8 is fixedly connected with the bottom end of the second inclined inner support rod 4, and the bottom end of the third inclined inner support rod 8 is fixedly connected with the second horizontal support rod 9, the fourth inclined inner support rod 10 is arranged below the first inclined inner support rod 2, and the fourth inclined inner support rod 10 is arranged symmetrically with the first inclined inner support rod 2 along the axis of the first horizontal connecting rod 6, the top end of the fourth inclined inner support rod 10 is fixedly connected with the bottom end of the first inclined inner support rod 2, and the bottom end of the fourth inclined inner support rod 10 is fixedly connected with the second horizontal support rod 9, and the third inclined inner support rod 8 and the fourth inclined inner support rod 10 are arranged symmetrically along the center line of the length direction of the second horizontal support rod 9. The other components and connection modes are the same as those in the fifth specific embodiment.

[0052] The seventh specific embodiment is combined. Figures 1 to 17 The embodiment is described. The embodiment is different from the sixth specific embodiment in that the top end of the first inclined inner support rod 2 is connected with the quarter length of the first horizontal support rod 3, the top end of the second inclined inner support rod 4 is connected with the three-quarter length of the first horizontal support rod 3, the bottom end of the fourth inclined inner support rod 10 is connected with the quarter length of the second horizontal support rod 9, and the bottom end of the third inclined inner support rod 8 is connected with the three-quarter length of the second horizontal support rod 9. The other components and connection modes are the same as those in the sixth specific embodiment.

[0053] The eighth specific embodiment is combined. Figures 1 to 17 The embodiment is described. The embodiment is different from the seventh specific embodiment in that the length of the first inclined inner support rod 2, the length of the second inclined inner support rod 4, the length of the third inclined inner support rod 8 and the length of the fourth inclined inner support rod 10 are the same, the included angle between the first inclined inner support rod 2, the second inclined inner support rod 4, the third inclined inner support rod 8 and the fourth inclined inner support rod 10 and the inner side of the y-axis direction is the same and is θ, and the value of θ is in the range of 10°-60°. The other components and connection modes are the same as those in the seventh specific embodiment.

[0054] Specific implementation nine: combination Figures 1 to 17 This embodiment is explained, and the difference between this embodiment and specific implementation eight is that the value range of θ is 20°-40°. The other components and connection modes are the same as those of specific implementation eight.

[0055] Specific implementation ten: combination Figures 1 to 17 This embodiment is explained, and the difference between this embodiment and specific implementation nine is that the rod sections of the first inclined outer support rod 1, the first inclined inner support rod 2, the first horizontal support rod 3, the second inclined inner support rod 4, the second inclined outer support rod 5, the first horizontal connecting rod 6, the third inclined outer support rod 7, the third inclined inner support rod 8, the second horizontal support rod 9, the fourth inclined inner support rod 10, the fourth inclined outer support rod 11, and the second horizontal connecting rod 12 are all square and have the same rod section area. The other components and connection modes are the same as those of specific implementation nine.

[0056] In combination with specific implementations one to ten, the reinforced hexagonal lattice structure described in this application is connected in the form of a common rod by connecting a plurality of reinforced hexagonal lattice cells in the x-axis direction and the y-axis direction through horizontal connecting rods, and connecting the inclined outer support rods and the inclined inner support rods of adjacent reinforced hexagonal lattice structure cells in the z-axis direction through horizontal support rods, to finally form a three-dimensional reinforced hexagonal lattice structure. Each reinforced hexagonal lattice cell is the core component of this application, which is composed of two two-dimensional reinforced hexagonal structures arranged at a 90° deflection, in combination with Figure 7 and Figure 8 As shown in the drawings, the rods used to form the two-dimensional reinforced hexagonal structure are all square rods with a side length of T, the first horizontal support rod 3 and the second horizontal support rod 9 have the same length H1, the first horizontal connecting rod 6 and the second horizontal connecting rod 12 have the same length H2, the first inclined outer support rod 1, the second inclined outer support rod 5, the third inclined outer support rod 7, and the fourth inclined outer support rod 11 have the same length L1; the first inclined inner support rod 2, the second inclined inner support rod 4, the third inclined inner support rod 8, and the fourth inclined inner support rod 10 have the same length L2.

[0057] Based on the above size parameters, the working condition is simulated to establish a finite element simulation model, Al6061-T6 material is used, and beam element is selected according to the first size combination in Table 1 to establish a lattice structure finite element simulation model, and simulation results are obtained by calculation. Taking the peak collision stress and the mass specific energy absorption as the optimization objectives, and taking each size variable as the optimization variable, the structure is optimized by using a multi-objective optimization algorithm to obtain the second size combination. The simulation model is established again, and the results are calculated. The results show that after using the second size combination, the mass specific energy absorption is increased by 1.6% compared with before, the peak collision stress is reduced by 60.4% compared with before, the buffer process of the structure is more stable, the initial peak collision stress is smaller, the mass specific energy absorption is larger, and the impact buffering capacity is better;

[0058]

[0059] Table 1 Size combination of two reinforced hexagonal lattice structures

[0060]

[0061] Table 2 Buffering results of two reinforced hexagonal lattice structures

[0062] The reinforced hexagonal lattice structure described in the application is designed to avoid structural interference, so the inner diagonal brace angle θ should be less than or equal to the inner diagonal brace angle γ, that is, θ≤γ. In order to clearly observe the changes of various crashworthiness indicators when the angle θ changes in a larger range, the angle γ between the outer diagonal edge and the bottom edge is 60°, and the angle θ between the inner diagonal edges is set to 10°, 20°, 30°, 40°, 50° and 60°, and the simulation results are obtained by calculation. Figure 13 It can be seen that as the angle increases, the average buffering force of the buffering force curve increases slightly, the peak collision force decreases slightly, and the compression stroke decreases, and Figure 14 It can be seen that the overall trend of the mass specific energy absorption decreases as the angle increases, and the compression stroke in the compression process becomes the main reason for the decrease of the total energy absorption. For the peak collision stress and the average collision stress, the peak collision stress reaches the minimum value when the angle is 30°, and the average collision stress reaches the minimum value when the angle is 20°;

[0063] In order to intuitively study the influence of the outer diagonal edge angle γ of the unit cell on the impact resistance of the structure, the outer diagonal edge angle γ is set to 10°, 20°, 30°, 40°, 50°, 60°, 70° and 80° respectively. By Figure 16 It can be seen that the buffering force curves corresponding to different angles γ differ greatly, mainly in terms of compression stroke, buffering force and fluctuation degree. It is obvious that the smaller the angle, the shorter the corresponding buffering force curve, the higher the buffering force and the more obvious the fluctuation degree. By Figure 17It can be seen that the mass specific energy absorption continuously increases when the cell angle γ increases from 10° to 30°, slightly decreases when the cell angle γ increases from 30° to 40°, and continuously increases when the cell angle γ increases from 40° to 80°. The peak impact force slightly decreases when the cell angle γ increases from 10° to 20°, and sharply increases when the cell angle γ increases from 20° to 80°. The average impact force always increases when the cell angle γ increases from 10° to 80°. The angle γ affects other dimensions, and in order to ensure the rationality of the structure, the length L1 is kept unchanged and the length L2 is reduced when the angle γ increases. The greater the angle γ, the smaller the length L2. The phenomenon that the greater the angle γ, the greater the specific energy absorption is actually because the length L2 has a greater impact on the specific energy absorption than the angle γ, and the reduction of the length L2 causes the increase of the specific energy absorption.

[0064] The present application has been disclosed as above with preferred embodiments, however, not for limiting the present application, any person skilled in the art can make some changes or modifications to the above disclosed structure and technical content without departing from the scope of the present application, and the equivalent embodiments with equivalent changes are obtained, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the present application.

[0065] Working principle

[0066] In use, the size and positional relationship of each component are determined according to the working condition and the pre-designed result, and each component is assembled according to the connection described in the specific embodiment, and finally the assembled reinforced hexagonal lattice structure is arranged between the upper impact plate and the lower support plate, as shown in Figure 9 It is worth noting that the upper impact plate is kept a certain distance from the upper end surface of the reinforced hexagonal lattice structure, and the lower support plate is in close contact with the lower end surface of the lattice in the arrangement. In actual application, the upper impact plate will collide with the upper end surface of the lattice at a certain initial speed, and the impact will be transmitted to the lattice structure. The lattice absorbs the impact energy by plastic deformation, thereby achieving the purpose of anti-collision and buffering.

Claims

1. A reinforced hexagonal lattice structure, characterized in that: The lattice structure includes multiple reinforced hexagonal lattice structure cell layers, which are arranged sequentially from top to bottom, and adjacent reinforced hexagonal lattice structure cell layers are fixedly connected. Each reinforced hexagonal lattice structure cell layer includes multiple reinforced hexagonal lattice structure cells, which are distributed in a rectangular array, and adjacent reinforced hexagonal lattice structure cells are fixedly connected. The reinforced hexagonal lattice structure cell includes two two-dimensional reinforced hexagonal structures. The two two-dimensional reinforced hexagonal structures are arranged in a cross pattern and are integrally formed. Each two-dimensional reinforced hexagonal structure includes a hexagonal outer frame, a reinforcing unit, a first horizontal connecting rod (6), and a second horizontal connecting rod (12). The reinforcing unit is set in the hexagonal outer frame and is fixedly connected to the inner wall of the hexagonal outer frame. The first horizontal connecting rod (6) and the second horizontal connecting rod (12) are arranged opposite to each other on both sides of the hexagonal outer frame, and the extension direction of the first horizontal connecting rod (6) and the second horizontal connecting rod (12) are aligned. The extension direction of 12) is the same. The length of the first horizontal connecting rod (6) is the same as that of the second horizontal connecting rod (12). One end of the first horizontal connecting rod (6) is fixedly connected to the connection point of two adjacent frame edges in the hexagonal outer frame. The other end of the first horizontal connecting rod (6) is fixedly connected to the other end of the second horizontal connecting rod (12) in the adjacent two-dimensional reinforced hexagonal structure. One end of the second horizontal connecting rod (12) is fixedly connected to the connection point of two adjacent frame edges in the hexagonal outer frame. The other end of the second horizontal connecting rod (12) is fixedly connected to the other end of the first horizontal connecting rod (6) in the adjacent two-dimensional reinforced hexagonal structure. The hexagonal outer frame includes a first inclined outer support rod (1), a first horizontal support rod (3), a second inclined outer support rod (5), a third inclined outer support rod (7), a second horizontal support rod (9), and a fourth inclined outer support rod (11). The first inclined outer support rod (1), the first horizontal support rod (3), the second inclined outer support rod (5), the third inclined outer support rod (7), the second horizontal support rod (9), and the fourth inclined outer support rod (11) are sequentially fixed end to end to form a hexagonal outer frame, and the length dimension of the first horizontal support rod (3) is... The length of the second horizontal support rod (9) is the same. The lengths of the first inclined outer support rod (1), the second inclined outer support rod (5), the third inclined outer support rod (7), and the fourth inclined outer support rod (11) are the same. One end of the first horizontal connecting rod (6) is fixedly connected to the connection point of the second inclined outer support rod (5) and the third inclined outer support rod (7). One end of the second horizontal connecting rod (12) is fixedly connected to the connection point of the first inclined outer support rod (1) and the fourth inclined outer support rod (11). The reinforcing unit includes a first inclined inner support rod (2), a second inclined inner support rod (4), a third inclined inner support rod (8), and a fourth inclined inner support rod (10). The first inclined inner support rod (2), the second inclined inner support rod (4), the third inclined inner support rod (8), and the fourth inclined inner support rod (10) are all disposed between the first horizontal support rod (3) and the second horizontal support rod (9). The first inclined inner support rod (2) and the second inclined inner support rod (4) are symmetrically disposed below the first horizontal support rod (3) along the centerline of the length direction of the first horizontal support rod (3), and the top ends of the first inclined inner support rod (2) and the second inclined inner support rod (4) are both fixedly connected to the first horizontal support rod (3). The third inclined inner support rod (8) is disposed below the second inclined inner support rod (4), and the third inclined inner support rod (8)... The first inclined inner support rod (2) and the second inclined inner support rod (4) are symmetrically arranged along the axis of the second horizontal connecting rod (12). The top end of the third inclined inner support rod (8) is fixedly connected to the bottom end of the second inclined inner support rod (4). The bottom end of the third inclined inner support rod (8) is fixedly connected to the second horizontal support rod (9). The fourth inclined inner support rod (10) is arranged below the first inclined inner support rod (2). The fourth inclined inner support rod (10) and the first inclined inner support rod (2) are symmetrically arranged along the axis of the first horizontal connecting rod (6). The top end of the fourth inclined inner support rod (10) is fixedly connected to the bottom end of the first inclined inner support rod (2). The bottom end of the fourth inclined inner support rod (10) is fixedly connected to the second horizontal support rod (9). The third inclined inner support rod (8) and the fourth inclined inner support rod (10) are symmetrically arranged along the center line of the length direction of the second horizontal support rod (9). The top end of the first inclined inner support rod (2) is connected to the first horizontal support rod (3) at one-quarter of its length; the top end of the second inclined inner support rod (4) is connected to the first horizontal support rod (3) at three-quarters of its length; the bottom end of the fourth inclined inner support rod (10) is connected to the second horizontal support rod (9) at one-quarter of its length; and the bottom end of the third inclined inner support rod (8) is connected to the second horizontal support rod (9) at three-quarters of its length.

2. The reinforced hexagonal lattice structure according to claim 1, characterized in that: The first inclined outer support rod (1), the second inclined outer support rod (5), the third inclined outer support rod (7) and the fourth inclined outer support rod (11) all have the same angle γ with the inner side of the y-axis direction.

3. The reinforced hexagonal lattice structure according to claim 2, characterized in that: The value of γ ranges from 10° to 80°.

4. The reinforced hexagonal lattice structure according to claim 2, characterized in that: The value of γ ranges from 40° to 60°.

5. The reinforced hexagonal lattice structure according to claim 4, characterized in that: The length dimensions of the first inclined inner support rod (2), the second inclined inner support rod (4), the third inclined inner support rod (8), and the fourth inclined inner support rod (10) are the same. The angle between the first inclined inner support rod (2), the second inclined inner support rod (4), the third inclined inner support rod (8), and the fourth inclined inner support rod (10) and the inner side of the y-axis is the same, which is θ. The value of θ ranges from 10° to 60°.

6. The reinforced hexagonal lattice structure according to claim 5, characterized in that: The value of θ ranges from 20° to 40°.

7. The reinforced hexagonal lattice structure according to claim 6, characterized in that: The cross-sections of the first inclined outer support rod (1), the first inclined inner support rod (2), the first horizontal support rod (3), the second inclined inner support rod (4), the second inclined outer support rod (5), the first horizontal connecting rod (6), the third inclined outer support rod (7), the third inclined inner support rod (8), the second horizontal support rod (9), the fourth inclined inner support rod (10), the fourth inclined outer support rod (11), and the second horizontal connecting rod (12) are all square and have the same cross-sectional area.

Images