L-shaped basic piece and octahedral cell configuration and discrete assembly mechanics superstructure

Abstract

The application discloses an L-shaped basic piece, an octahedral unit cell configuration and a discrete assembly mechanical superstructure, relates to the technical field of mechanical superstructure, and comprises an L-shaped rod body, the corner of the L-shaped rod body is a right angle, the L-shaped rod body forms a rod body middle part shoulder structure and a rod body end part shoulder structure; and the rod body middle part shoulder structure and the rod body end part shoulder structure corresponding to the six L-shaped rod bodies are connected to form an octahedral unit cell configuration body. A plurality of octahedral unit cell configuration bodies are connected to each other to form a three-dimensional matrix structure by using the octahedral unit cell configuration. According to different connection forms, three different assembly configurations are provided. The discrete unit cell parts can be prepared in large quantities, and the production cost is effectively reduced. The discrete assembly mode further eliminates the limitation of the machining process and the machining size, and solves the problems that the integral forming technology cannot prepare a large-scale lattice superstructure, and the discrete assembly part structure is complex and troublesome to assemble.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical superstructure, in particular to a discrete assembly multi-mode mechanical superstructure, more particularly to an L-shaped basic piece, an octahedral unit cell configuration and a discrete assembly mechanical superstructure. BACKGROUND

[0002] With the continuous expansion of the scale of large space structures such as large-aperture infrared telescopes for space large communication antennas and space solar power stations, the mode of multiple launch components and on-orbit assembly has the disadvantages of time-consuming, high cost and poor reliability. The development of space manufacturing technology will realize the strategic transformation from "ground manufacturing for space use" to "space manufacturing for space use". However, how to realize the batch and rapid preparation of large-scale and high-reliability space structures is an important problem faced by current space manufacturing.

[0003] Mechanical superstructure has excellent mechanical properties such as low density, high specific strength and high specific stiffness, and is considered by the international community as the most promising new generation of advanced lightweight super-tough materials. At the same time, the large void ratio is more likely to realize the integrated design of many functions such as load bearing and damping, thermal control and energy absorption, and has a wide application prospect in the fields of aerospace, marine vessels and the like. Mechanical superstructure is expected to help space manufacturing realize the strategic shift from "ground manufacturing for space use" to "space manufacturing for space use".

[0004] Mechanical lattice superstructure has excellent mechanical properties, but due to the problems of complex geometric structure, difficulty in preparing large structures, long time-consuming for integrated forming and preparation, etc., it still cannot meet the needs of space manufacturing. At the same time, the integrated mechanical superstructure needs to be replaced as a whole in the case of local damage, which is too costly to produce and maintain.

[0005] In summary, how to utilize the discrete assembly design of mechanical lattice superstructure to make full use of space resources, realize the rapid batch preparation of large space structures, and reduce their maintenance cost is a key problem for realizing the strategic shift of space manufacturing from "ground manufacturing for space use" to "space manufacturing for space use". SUMMARY

[0006] Therefore, the present application provides an L-shaped basic piece, an octahedral unit cell configuration and a discrete assembly mechanical superstructure, which aims to solve the above technical problems.

[0007] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0008] An L-shaped basic piece comprises an L-shaped rod piece body:

[0009] The L-shaped rod body has right angles at its corners, and the right angle corners are chamfered to form flat angle transition sections. The upper and lower surfaces of the flat angle transition sections are formed with rod body middle fitting notches. The rod body middle fitting notches and the stepped portions on both sides form a rod body middle shoulder structure. The two ends of the L-shaped rod body have rod body end fitting notches. The opening directions of the rod body end fitting notches at both ends of the L-shaped rod body are the same. The rod body end fitting notches and the stepped portions near the L-shaped rod body form rod body end shoulder structures.

[0010] Preferably, in the above-mentioned L-shaped basic component, mounting holes are provided on the middle shoulder structure of the rod, the end shoulder structure of the rod, and the main body of the L-shaped rod.

[0011] Preferably, in the above-mentioned L-shaped basic component, the shoulder thickness of the middle shoulder structure and the shoulder thickness of the end shoulder structure of the rod are equal, and both are one-third of the thickness of their shoulder root.

[0012] This invention also provides an octahedral unit cell configuration: assembled using six of the aforementioned L-shaped basic components. Assuming a cube model is established in three-dimensional space, the six L-shaped rod bodies are placed within the cube model, such that the central shoulder structures of the six L-shaped rod bodies are located at the center points of the six faces of the cube model, and the two end shoulder structures of each L-shaped rod body are located at the center points of two opposite faces of the cube model. The rods of the six L-shaped rod bodies do not overlap. The central shoulder structures and end shoulder structures corresponding to the center points of the six faces of the cube model are connected to form an octahedral unit cell configuration.

[0013] Preferably, in the above-mentioned octahedral unit cell configuration, the middle shoulder structure of each L-shaped rod body is sandwiched between the end shoulder structures of two connected L-shaped rod bodies.

[0014] Preferably, in the above-mentioned octahedral unit cell configuration, the interconnected middle shoulder structure of the rod and the end shoulder structure of the rod are connected by unit cell connecting bolts.

[0015] Preferably, in the above-mentioned octahedral unit cell configuration, the thickness t of the L-shaped rod body is 1 / 35 to 1 / 15 of the length of the octahedral unit cell configuration body; the shoulder thickness is 0.75t to 1.5t.

[0016] The present invention also provides a discrete assembly mechanical superstructure: using the above-mentioned octahedral unit cell configuration, multiple octahedral unit cell bodies are connected to each other to form a three-dimensional matrix structure.

[0017] Preferably, in the above-mentioned discrete assembly mechanical superstructure, the connection relationship between multiple octahedral unit cell configuration bodies in the same layer is as follows: adjacent octahedral unit cell configuration bodies are connected through the position of the flat angle transition section of the L-shaped rod body; or, adjacent octahedral unit cell configuration bodies are connected through the rod body of the L-shaped rod body.

[0018] Preferably, in the above-mentioned discrete assembly mechanical superstructure, the connection relationship between multiple octahedral unit cell configuration bodies in two adjacent layers is as follows: the octahedral unit cell configuration bodies in two adjacent layers are connected through the position of the flat angle transition section of the L-shaped rod body; or, an additional octahedral unit cell configuration body is provided between the octahedral unit cell configuration bodies in two adjacent layers, and is connected to the rod body of the other adjacent L-shaped rod body through the rod body of the additionally provided L-shaped rod body.

[0019] As can be seen from the above technical solution, compared with the prior art, the present invention discloses an L-shaped basic component and an octahedral unit cell configuration and a discrete assembly mechanical superstructure, which has the following beneficial effects:

[0020] 1. This invention designs a novel discrete assembly mechanical superstructure. The superstructure unit cell is composed of a basic component, and the assembled structure contains only two components: an L-shaped basic component and a bolt group of the same specification. Following the discrete-assembly design concept, the unit cell is discretized into identical basic components, which are then connected and assembled through mortise and tenon structures and bolt groups to form a complete lattice unit cell.

[0021] 2. Compared to monolithic lattice structures, this invention enables the fabrication of large-scale lattice structures and offers superior repairability. Damaged unit cells can be quickly replaced, restoring their original mechanical properties. Compared to other non-monolithic lattice structures, this invention utilizes a single basic component that can be flexibly assembled, reducing the scale and technical requirements of space additive manufacturing equipment, making manufacturing more flexible, and simplifying the assembly process.

[0022] 3. The discrete unit cell designed in this invention can be designed with unit cells of different sizes to form mechanical superstructures of arbitrary size and rich shape. This avoids the limitations of the manufacturing volume of the fabrication equipment itself, enabling the fabrication of large-scale structures at the centimeter and meter levels. It overcomes the limitations of small-size integrally formed lattice structures. Based on different space equipment and their performance requirements, the standardized discrete structures fabricated can have their performance customized and adjustable according to the matrix material, the topological configuration of the component cells, and the assembly scale.

[0023] 4. The present invention can use materials with different coefficients of thermal expansion to prepare unit components. Through a certain assembly sequence, negative thermal expansion characteristics can be achieved to form a negative thermal expansion superlattice structure.

[0024] 5. This invention proposes a method for producing large-scale lattice structures by discrete assembly of modular, mass-produced basic components, and proposes a simple, low-cost, and highly repeatable preparation method. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0026] Figure 1 The attached figure is a schematic diagram of the L-shaped rod body structure provided by the present invention;

[0027] Figure 2 The attached figure is a front view of the L-shaped rod body provided by the present invention;

[0028] Figure 3 The attached figure is a top view of the L-shaped rod body provided by the present invention;

[0029] Figure 4 The attached figure is a side view of the L-shaped rod body provided by the present invention;

[0030] Figure 5 The attached figure is a schematic diagram of the assembly of the L-shaped rod body provided by the present invention;

[0031] Figure 6 The attached figure is a schematic diagram of the octahedral unit cell configuration body structure provided by the present invention;

[0032] Figure 7 The attached figure is a schematic diagram of the assembly structure of two discrete superstructure units in Embodiment 1 of the present invention;

[0033] Figure 8 The attached figure is of the present invention. Figure 7 Partial cross-sectional view of two discrete assembly superstructure unit cell assemblies;

[0034] Figure 9 The attached figure is a schematic diagram of a 2×2×2 order discrete assembly superstructure in Embodiment 1 of the present invention;

[0035] Figure 10 The attached figure is a schematic diagram of a 4×4×4 order discrete assembly superstructure in Embodiment 1 of the present invention;

[0036] Figure 11 The attached figure is a schematic diagram of the assembly structure of two discrete assembly superstructures in Embodiment 2 of the present invention;

[0037] Figure 12 The attached figure is of the present invention. Figure 11 Partial cross-sectional view of two discrete assembly superstructure unit cell assemblies;

[0038] Figure 13 The attached figure is a schematic diagram of a 2×2×2 order discrete assembly superstructure in Embodiment 2 of the present invention;

[0039] Figure 14 The attached figure is a schematic diagram of a 4×4×4 order discrete assembly superstructure in Embodiment 2 of the present invention;

[0040] Figure 15 The attached figure is a schematic diagram of a 2×2×2 order discrete assembly superstructure in Embodiment 3 of the present invention;

[0041] Figure 16 The attached figure is a schematic diagram of a 4×4×4 order discrete assembly superstructure in Embodiment 3 of the present invention;

[0042] Figure 17 The attached figure is a schematic diagram of the axial compressive load and constraint settings in the finite element analysis of Embodiment 4 of the present invention;

[0043] Figure 18 The attached figure is a schematic diagram of the force-displacement curve of a unit cell in Embodiment 4 of the present invention;

[0044] Figure 19 The attached figure is a stress cloud diagram of the peak load on a single cell in Embodiment 4 of the present invention;

[0045] Figure 20 The attached figure is a schematic diagram of the force-displacement curves of the 2×2×2 order discrete assembly superstructure in Embodiment 4 of the present invention;

[0046] Figure 21 The attached figure is a stress cloud diagram of the 2×2×2 structure in Embodiment 4 of the present invention under the peak load.

[0047] in:

[0048] 1-L-shaped bar body one; 2-L-shaped bar body two; 3-L-shaped bar body three; 4-L-shaped bar body four; 5-L-shaped bar body five; 6-L-shaped bar body six;

[0049] 10-L-shaped rod body; 101-Through hole one; 102-Through hole two; 103-Through hole three; 104-Through hole four; 105-Through hole five; 106-Through hole six; 107-Through hole seven; 108-Shoulder structure in the middle of the rod; 109-Shoulder structure at the end of the rod;

[0050] 201 - Unit cell connection bolt; 202 - Structural connection bolt;

[0051] 301-Octahedral unit cell configuration body. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] See appendix Figure 1 This invention discloses an L-shaped basic component, including an L-shaped rod body 10:

[0054] The L-shaped rod body 10 has right angles at its corners, and the right angle corners are chamfered to form flat angle transition sections. The upper and lower surfaces of the flat angle transition sections are formed with rod middle insertion notches. The rod middle insertion notches and the stepped portions on both sides form a rod middle shoulder structure 108. The two ends of the L-shaped rod body 10 have rod end insertion notches. The rod end insertion notches at both ends of the L-shaped rod body 10 have the same opening direction. The rod end insertion notches and the stepped portions near the L-shaped rod body 10 form rod end shoulder structures 109.

[0055] To further optimize the above technical solution, mounting holes are provided on the middle shoulder structure 108, the end shoulder structure 109, and the L-shaped rod body 10. Specifically, the L-shaped rod body 10 has 7 mounting holes: through hole 101 and through hole 3 103 are located on the two end shoulder structures 109 respectively; through hole 2 102 is located on the middle shoulder structure 108; through hole 4 104 and through hole 5 105 are located on the same long side; and through hole 6 106 and through hole 7 107 are located on the other long side.

[0056] To further optimize the above technical solution, the shoulder thickness of the middle shoulder structure 108 and the end shoulder structure 109 of the rod is equal, and both are one-third of the thickness of their shoulder root.

[0057] See appendix Figure 5 and attached Figure 6The present invention also discloses an octahedral unit cell configuration, which is assembled using six of the above-mentioned L-shaped basic components: Assuming a cube model is established in three-dimensional space, and six L-shaped rod bodies 10 are placed inside the cube model, such that the middle shoulder structure 108 of the rod body of the six L-shaped rod bodies 10 is located at the center point of the six faces of the cube model, and the two end shoulder structures 109 of each L-shaped rod body 10 are located at the center point of two opposite faces of the cube model, and the rods of the six L-shaped rod bodies 10 do not overlap. The middle shoulder structure 108 and the end shoulder structure 109 of the rod body corresponding to the center point of the six faces of the cube model are connected to form an octahedral unit cell configuration body 301.

[0058] like Figure 5 As shown, each vertex of the octahedral unit cell configuration body 301 is assembled sequentially from the shoulder structures of three L-shaped rod bodies 10 according to the mortise and tenon principle. The entire octahedral unit cell configuration body 301 is assembled sequentially from six L-shaped rod bodies 10, forming a closed loop, thus forming a complete octahedral basic unit cell, and thus forming a complete discrete assembly superstructure unit cell.

[0059] To further optimize the above technical solution, the middle shoulder structure 108 of each L-shaped rod body 10 is clamped between the end shoulder structures 109 of the two connected L-shaped rod bodies 10.

[0060] To further optimize the above technical solution, the middle shoulder structure 108 and the end shoulder structure 109 of the rod are connected by a unit cell connecting bolt 201.

[0061] See appendix Figure 2 To be continued Figure 4 The thickness t of the L-shaped rod body 10 is 1 / 35 to 1 / 15 of the length of the octahedral unit cell body 301; the shoulder thickness b is 0.75t to 1.5t, and the thickness at the root of the shoulder is 3b. The diameter of the mounting hole is d, the through hole size is generally 1.1 times the outer diameter of the standard bolt, the short side thickness W is generally 2.5d to 5d of the mounting hole diameter, the shoulder size is W×W mm, and the distance between the upper and lower ends of the shoulder of the shoulder structure 108 in the middle of the rod body is b.

[0062] like Figure 3 As shown in the figure, L is the projected length of the L-shaped rod body 10 in the top view.

[0063] The size of the shoulder is generally determined based on the dimensions of the octahedral unit cell structure body 301 and the bolt size, and is generally 2.5d-3d. The thickness of the shoulder is generally 1 / 2t-4 / 5t.

[0064] The unit cells based on the L-shaped rod body 10 can form a variety of different superstructure configurations:

[0065] Configuration 1 uses mounting holes on the shoulders of L-shaped rod bodies 10 to connect unit cells, and structural connectors 202 are used to connect the unit cells. The unit cells are assembled using unit cell connecting bolts 201. Through assembly, a mechanical lattice superstructure with a BCC configuration can be formed.

[0066] Configuration 2 uses mounting holes on the long side of the unit cell to connect the units. In the direction perpendicular to the long side connection, the connection method of Configuration 1 is used. Configuration 2 adopts two assembly methods to achieve expansion in different directions, and proposes a novel method for the production and preparation of anisotropic superstructures.

[0067] Configuration 3 uses mounting holes on the L-shaped rod body 10 for assembling unit cells, introducing an additional octahedral unit cell configuration body 301. Mounting holes on the long side of the additional octahedral unit cell configuration body 301 are used to connect the upper and lower layers of unit cells, thus replacing the long bolt connection in Configuration 2 and achieving long-side connection in any direction. Through assembly, a mechanical lattice superstructure of the Octet configuration can be formed, with standard bolts used for connection.

[0068] The L-shaped rod body 10 is connected by mortise and tenon joints and bolts to form a complete unit cell. Multiple lattice unit cells can be periodically assembled and connected by bolts. Discrete unit cell parts can be mass-produced using traditional manufacturing processes, effectively reducing production costs. The discrete assembly method also further eliminates limitations on processing technology and dimensions. Furthermore, compared to other discrete assembly structures, the designed discrete assembly lattice structure is composed of a single basic component, enabling faster mass production and better repairability. This lattice structure features scalability, multifunctionality, and high reliability.

[0069] The discrete assembly design of superstructures in Configurations 1, 2, and 3 offers numerous advantages, including low density, high reliability, repairability, high load-bearing capacity, shock resistance, and ease of deployment. The material properties, topological configuration, and dimensional parameters of the discrete component units can be customized according to different space requirements and payload missions.

[0070] The unit cell is assembled from six L-shaped rod bodies 10 made of different materials, which can form a multi-material superlattice structure.

[0071] The unit cell volume fraction of the discrete assembly mechanical superstructure can be controlled within the range of 4% to 15% by changing parameters such as L, W, and t of the L-shaped rod body 10.

[0072] Example 1:

[0073] See Figures 7-10 To achieve the production and fabrication of large-scale discrete assembly superstructures and their expansion in various directions, individual cells can be connected through assembly, thereby enabling expansion in any size and direction.

[0074] Specifically, the unit cell connecting bolt 201 is replaced by a long structural connecting bolt 202, thereby assembling two unit cells together using the long bolt, such as... Figure 7 and Figure 8 As shown.

[0075] Using the method described above, multi-cell assembly is performed in three mutually perpendicular directions, such as... Figure 9 As shown. This allows for further expansion to any size and in any direction. Figure 10 This invention presents the first 4×4×4 order discrete assembly superstructure.

[0076] Example 2:

[0077] See Figures 11-14 To adapt to different load-bearing requirements and meet different performance requirements, a second assembly method is proposed to replace the connection between some vertices by connecting the long sides, thereby improving its load-bearing performance.

[0078] Based on Example 1, mounting holes on the long side are used to connect the long side of a unit cell to the long side of an adjacent unit cell, such as... Figure 11 and Figure 12 As shown.

[0079] Following the above method, the plane where the long side connects to the adjacent side is used for connection. In the vertical direction, the long bolt connection as described in Example 1 is employed, thereby achieving expansion in three directions, such as... Figure 13 Due to the different extension connection methods in the three directions, the proposed second splicing method can exhibit different mechanical properties in different directions, which can meet some specific engineering needs and propose a new production method and preparation method for anisotropic discrete assembly superstructures.

[0080] By employing two assembly methods, expansion in different directions was achieved, and a novel method for the production and fabrication of anisotropic superstructures was proposed. Figure 14 This is the second 4×4×4 order discrete assembly superstructure provided in this invention.

[0081] Example 3:

[0082] See Figures 15-16To further improve the load-bearing performance of the structure and achieve characteristics such as lightweight, high load-bearing capacity, impact resistance, and easy deployment, this invention proposes a third assembly method. All connections between unit cells are assembled using mounting holes on the long side, thereby further improving the load-bearing performance of the structure.

[0083] As used in Example 2, the mounting holes on the long side are used to connect the long side of the unit cell to the long side of the adjacent unit cell.

[0084] In the direction perpendicular to the aforementioned connection, another unit cell is introduced to connect the unit cells in the vertical direction. An additional octahedral unit cell configuration body 301 uses mounting holes on its long side to connect the upper and lower unit cells, thus replacing the long bolt connection in Embodiment 1 and achieving long-side connection in any direction, such as... Figure 15 As shown. Figure 16 This is the third 4×4×4 order discrete assembly superstructure proposed in this invention.

[0085] Example 4:

[0086] See Figures 17-19 To further illustrate the mechanical load-bearing performance of the superstructure based on discrete assembly of L-shaped basic components, finite element analysis was performed on the regular octahedral unit cell composed of the L-shaped rod body 10 and the first type of 2×2×2 unit cell.

[0087] In the finite element analysis, the given dimensions of the structure are L = 93.9 mm and W = 5 mm. The unit cell volume fraction based on the L-shaped rod body 10 assembly is approximately 4.9%. The material of the structure is defined as 316 stainless steel with a density of 7980 kg / m³. 3 Its elastic modulus is 206 GPa and its Poisson's ratio is 0.3.

[0088] Figure 17 The axial compression and boundary conditions are for a regular octahedral unit cell in finite element analysis. Axial compression is applied to the upper surface of the unit cell with an axial compression displacement of 10 mm, and fixed support is applied to the lower surface of the unit cell.

[0089] Furthermore, plot the force-displacement curves of the unit cell, such as... Figure 18 As shown in the figure, through finite element analysis, the support reaction force of the unit cell exhibits a trend of first increasing and then decreasing during the compression process. Figure 19 The stress contour plot corresponds to the peak load.

[0090] Furthermore, finite element analysis was performed on the 2×2×2 order discrete assembly superstructure in Example 3, and the force-displacement curves of the 2×2×2 order (configuration two) discrete assembly superstructure were obtained, as follows: Figure 20 As shown. Figure 21 This is the stress contour plot corresponding to the peak value of the force-displacement curve.

[0091] In summary, the superstructure designed in this invention based on discrete assembly of L-shaped basic components has the characteristics and performance of being lightweight, having high load-bearing capacity, being impact-resistant, and being easy to deploy.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0093] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An octahedral unit cell configuration, characterized in that, The six L-shaped basic components are assembled: The L-shaped basic component comprises an L-shaped rod body (10); the corner of the L-shaped rod body (10) is a right angle, and the right angle corner is formed into a flat corner transition section; the upper and lower surfaces of the flat corner transition section are both formed with a rod body middle embedded notch, the rod body middle embedded notch and the stepped portions on both sides thereof form a rod body middle shoulder structure (108), both ends of the L-shaped rod body (10) are formed with a rod body end embedded notch, the rod body end embedded notches at both ends of the L-shaped rod body (10) are in the same opening direction, and the rod body end embedded notches and the stepped portions close to the L-shaped rod body (10) form a rod body end shoulder structure (109); The rod body middle shoulder structure (108), the rod body end shoulder structure (109) and the rod body of the L-shaped rod body (10) are all provided with mounting holes; The shoulder thicknesses of the rod body middle shoulder structure (108) and the rod body end shoulder structure (109) are equal, and each is one third of the thickness of the shoulder root portion; Suppose that a cubic model is established in a three-dimensional space, and six L-shaped rod bodies (10) are placed in the cubic model, so that the rod body middle shoulder structures (108) of the six L-shaped rod bodies (10) are respectively located at the center points of the six faces of the cubic model, and so that the two rod body end shoulder structures (109) of each L-shaped rod body (10) are respectively located at the center points of two opposite faces of the cubic model, and the rod bodies of the six L-shaped rod bodies (10) do not overlap each other, the rod body middle shoulder structures (108) and the rod body end shoulder structures (109) corresponding to the center points of the six faces of the cubic model are connected, forming an octahedral unit cell configuration body (301).

2. An octahedral unit cell configuration according to claim 1, wherein, The rod body middle shoulder structure (108) of each L-shaped rod body (10) is clamped between the rod body end shoulder structures (109) of two connected L-shaped rod bodies (10).

3. An octahedral unit cell configuration according to claim 1, wherein, The mutually connected rod body middle shoulder structures (108) and the rod body end shoulder structures (109) are connected by a unit cell connecting bolt (201).

4. An octahedral unit cell configuration according to claim 1, wherein, The rod body thickness t of the L-shaped rod body (10) is 1 / 35-1 / 15 of the long dimension of the outer shape of the octahedral unit cell configuration body (301); the shoulder thickness is 0.75t-1.5t.

5. A discrete assembled mechanical superstructure, characterized in that, A plurality of octahedral unit cell configuration bodies (301) are connected to each other to form a three-dimensional matrix structure by using the octahedral unit cell configuration of any one of claims 1-4.

6. A discrete assembled mechanical superstructure according to claim 5, wherein, For the connection relationship between a plurality of octahedral unit cell configuration bodies (301) of the same layer: adjacent octahedral unit cell configuration bodies (301) are connected by the positions of the flat corner transition sections of the L-shaped rod bodies (10); or, adjacent octahedral unit cell configuration bodies (301) are connected by the rod bodies of the L-shaped rod bodies (10).

7. A discrete assembled mechanical superstructure according to claim 6, wherein, For the connection relationship between the plurality of octahedral cell configuration bodies (301) of the upper and lower adjacent two layers: the upper and lower adjacent octahedral cell configuration bodies (301) are connected through the position of the flat angle transition section of the L-shaped rod body (10); or, the upper and lower adjacent octahedral cell configuration bodies (301) are provided with additional octahedral cell configuration bodies (301), and the rod bodies of the additional L-shaped rod bodies (10) are connected with the rod bodies of other adjacent L-shaped rod bodies (10).

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