A tensile-bending coupled multi-triangle lattice

Abstract

The application provides a pull-bending coupled multi-triangle lattice, and belongs to the technical field of 3D printing, comprising: a plurality of lattice units arranged in layers, and a plurality of unit cells arranged in each layer of the lattice units, wherein, when any two adjacent unit cells in each layer of the lattice units are projected onto the same horizontal plane, a rhombus-shaped intersection region is formed between the two unit cells, and the center line of the two unit cells in the horizontal plane divides the rhombus-shaped intersection region into two symmetrically arranged triangles; when any three adjacent unit cells in each layer of the lattice units are projected onto the same horizontal plane, rhombus-shaped intersection regions are formed between any two unit cells, and the center line of the three unit cells in the horizontal plane forms a triangle; and when any two adjacent lattice units are projected onto the same horizontal plane, the two lattice units coincide with each other. The application has high bearing capacity, strength and bending resistance.

Description

Technical Field

[0001] This invention belongs to the field of lattice structure technology and relates to a multi-triangular lattice with tension-bending coupling. Background Technology

[0002] Currently, with the advancement of technology, the aerospace field is no longer limited to basic flight. Energy conservation and emission reduction during flight have become mainstream topics. For example, the use of lightweight alloy lattice structures with high specific strength in wings and landing gear can achieve shock absorption, sound absorption, and weight reduction, thereby achieving energy conservation and emission reduction. Therefore, the aerospace field urgently needs to solve the problems of lightweight fuselage and high specific strength in structure.

[0003] Currently, researchers generally focus on material selection and structural design. However, material innovation is limited by its long development cycle, making structural design the dominant approach in this field. However, some lattice structures exhibit good rigidity but poor bending resistance, while others possess good bending resistance but insufficient rigidity, failing to simultaneously achieve both multi-directional rigidity and bending resistance. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a multi-triangular lattice that can simultaneously satisfy both rigidity and bending resistance.

[0005] The objective of this invention can be achieved through the following technical solution: a multi-triangular lattice of tension-bending coupling, comprising:

[0006] Multiple lattice units are stacked, and each layer of lattice units contains multiple unit cells. When any two adjacent unit cells in each layer are projected onto the same horizontal plane, a rhomboid intersection area is formed between them, and the line connecting the centers of the two unit cells in the horizontal plane divides the rhomboid intersection area into two symmetrical triangles. When any three adjacent unit cells in each layer are projected onto the same horizontal plane, a rhomboid intersection area is formed between any two unit cells, and the line connecting the centers of the three unit cells in the horizontal plane forms a triangle. When any two adjacent lattice units in any layer are projected onto the same horizontal plane, they overlap.

[0007] In the aforementioned tension-bending coupled multi-triangular lattice, each unit cell includes a vertically arranged central rod, and multiple supporting rods radiate outward from the two ends of the central rod, with the angle between adjacent supporting rods being consistent. When the central rod is projected onto the horizontal plane, it serves as the center of the unit cell.

[0008] In the aforementioned multi-triangular lattice of tension-bending coupling, there are six support rods on the same end of the central rod. Among them, some support rods are set perpendicular to the central rod and are horizontal support rods, while other support rods are set obliquely to the central rod and are oblique support rods. The horizontal support rods serve as common support rods between two adjacent unit cells and also serve as dividing lines that divide the rhomboid intersection area into two symmetrically arranged triangles.

[0009] In the aforementioned multi-triangular lattice of tension-bending coupling, the four sides of the intersection region arranged in a rhombus are two oblique support rods located at the same end of the central rod in two adjacent unit cells, while the common support rod serves as the common side that divides the intersection region into two symmetrical triangles.

[0010] In the aforementioned multi-triangular lattice of tension-bending coupling, among the multiple support rods at the same end of the central rod, the horizontal support rods and the diagonal support rods are arranged at intervals.

[0011] In the aforementioned multi-triangular lattice of tension-bending coupling, the positions of the horizontal support rods connected to both ends of the central rod correspond one-to-one, and the positions of the oblique support rods connected to both ends of the central rod also correspond one-to-one. The axes of the two oblique support rods located at the corresponding positions at both ends of the central rod extend in directions that are far apart from each other.

[0012] In the aforementioned tension-bending coupled multi-triangular lattice, two oblique support rods connected at corresponding positions at both ends of the central rod are connected by a vertical connecting rod, and the axial direction of the vertical connecting rod is parallel to the axial direction of the central rod. Among them, at least one vertical connecting rod is shared between two adjacent unit cells on the same horizontal plane.

[0013] In the aforementioned multi-triangular lattice of tension-bending coupling, when six support rods radiate outward from each end of the central rod, the number of diagonal support rods at each end of the central rod is three. These support rods form three frame-shaped supports in different vertical planes through vertical connecting rods. Each frame-shaped support is arranged in a trapezoidal structure. The upper ends of the three trapezoidal frame-shaped supports share a central rod, and the lower ends of the three trapezoidal frame-shaped supports are corresponding vertical connecting rods. The two sides of each trapezoidal frame-shaped support are two diagonal support rods at the corresponding positions at both ends of the central rod.

[0014] In the aforementioned multi-triangular lattice of tension-bending coupling, the midpoint of the vertical connecting rod of each trapezoidal frame support is connected to both ends of the central rod by diagonal connecting rods, dividing the entire trapezoidal frame support into three triangles.

[0015] In the aforementioned multi-triangular lattice of tension-bending coupling, the lengths and diameters of the horizontal support rods, diagonal support rods, central rods, and diagonal connecting rods are all equal. Among them, the length of the vertical connecting rod is twice that of the central rod, and the diameter of the vertical connecting rod is the same as that of the central rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention provides a multi-triangular lattice with tension-bending coupling, which has high load-bearing capacity and strength, and good bending resistance. It can ensure the integrity of the lattice structure when subjected to external impact, and avoid deformation or damage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the unit cell in this invention.

[0019] Figure 2 This is a schematic diagram of the unit cell from another perspective in this invention.

[0020] Figure 3 This is a schematic diagram of the structure of a single-layer lattice unit in this invention.

[0021] Figure 4 This is a schematic diagram of the single-layer lattice unit from another perspective in this invention.

[0022] Figure 5 This is a schematic diagram of a multi-triangular lattice structure with tension-bending coupling according to the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of a multi-triangular lattice with tension-bending coupling from another perspective of the present invention.

[0024] In the diagram, 10 is the intersection area; 20 is the center rod; 30 is the horizontal support rod; 40 is the diagonal support rod; 50 is the vertical connecting rod; and 60 is the diagonal connecting rod. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0027] like Figures 1 to 6As shown, the present invention provides a multi-triangular lattice of tension-bending coupling, comprising: multiple stacked lattice units, each layer of which contains multiple unit cells; wherein, when any two adjacent unit cells in each layer of lattice units are projected onto the same horizontal plane, a rhomboid intersection region 10 is formed between them, and the center line connecting the two unit cells in the horizontal plane divides the rhomboid intersection region 10 into two symmetrically arranged triangles; when any three adjacent unit cells in each layer of lattice units are projected onto the same horizontal plane, a rhomboid intersection region 10 is formed between any two unit cells, and the center line connecting the three unit cells in the horizontal plane forms a triangle; when any two adjacent lattice units in any layer are projected onto the same horizontal plane, they overlap.

[0028] It is worth mentioning that all the triangles mentioned above are equilateral triangles.

[0029] The present invention provides a multi-triangular lattice with tension-bending coupling, which has high load-bearing capacity and strength, and good bending resistance. It can ensure the integrity of the lattice structure when subjected to external impact, and avoid deformation or damage.

[0030] Preferably, each unit cell includes a vertically arranged central rod 20, and multiple support rods radiate outward from the two ends of the central rod 20, with the angle between adjacent support rods being the same. The length and diameter of each support rod are equal, and the central rod 20 serves as the center of the unit cell when projected onto the horizontal plane.

[0031] Furthermore, the length and diameter of the central rod 20 are equal to the length and diameter of the support rod, respectively.

[0032] It is worth mentioning that the diameter of both the support rod and the center rod 20 is 0.4mm-1mm. The length of both the support rod and the center rod 20 is 5mm-10mm.

[0033] Preferably, there are six support rods on the same end of the central rod 20. When the six support rods are projected onto the same horizontal plane, the included angle between two adjacent support rods is 60°. Among them, a part of the support rods are set perpendicular to the central rod 20, which are horizontal support rods 30, and another part of the support rods are set obliquely to the central rod 20, which are oblique support rods 40. The horizontal support rods 30 serve as common support rods between two adjacent unit cells, and at the same time, they serve as dividing lines that divide the diamond-shaped intersection area 10 into two symmetrically arranged triangles.

[0034] It is worth mentioning that the angle between the inclined support rod 40 and the central rod 20 is 120°.

[0035] In addition, the rhomboid intersection area 10 is formed by splicing the oblique support rods 40 located at the same end of the central rod 20 in two adjacent unit cells to form the four sides of the rhombus, while the common support rod serves as the common side that divides the rhombus into two symmetrical triangles.

[0036] More preferably, among the multiple support rods at the same end of the central rod 20, the horizontal support rod 30 and the inclined support rod 40 are arranged at intervals.

[0037] More preferably, the positions of the horizontal support rods 30 connected to both ends of the central rod 20 are one-to-one, and the positions of the inclined support rods 40 connected to both ends of the central rod 20 are one-to-one, wherein the axes of the two inclined support rods 40 located at the corresponding positions at both ends of the central rod 20 extend in a direction away from each other.

[0038] Preferably, the two inclined support rods 40 connected at corresponding positions at both ends of the central rod 20 are connected by a vertical connecting rod 50, and the axial direction of the vertical connecting rod 50 is parallel to the axial direction of the central rod 20. At least one vertical connecting rod 50 is shared between two adjacent unit cells on the same horizontal plane.

[0039] It is worth mentioning that since there are three diagonal support rods 40 at each end of the central rod 20, three frame-shaped supports are formed in different vertical planes, and each frame-shaped support is set in a trapezoidal structure. The upper ends of the three frame-shaped supports in a trapezoidal structure share a central rod 20, and the lower ends of the three frame-shaped supports in a trapezoidal structure are corresponding vertical connecting rods 50. The two sides of each frame-shaped support in a trapezoidal structure are two diagonal support rods 40 at the corresponding positions at both ends of the central rod 20.

[0040] More preferably, the midpoint of the vertical connecting rod 50 of each trapezoidal frame bracket is connected to both ends of the central rod 20 by diagonal connecting rods 60, dividing the entire trapezoidal frame bracket into three triangles.

[0041] It is worth mentioning that all three triangles mentioned above are equilateral triangles.

[0042] In addition, the multi-triangular lattice of bending coupling in this invention is prepared by SLM (selective laser sintering) additive manufacturing technology. Among the process parameters used in SLM, the laser power is 220-270W, the scanning speed is 750-1000mm / s, the scanning spacing is 100-120μm, the powder thickness is 40-60μm, and the substrate preheating is set to 120℃.

[0043] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0045] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A multi-triangular lattice with tension-bending coupling, characterized in that, include: Multiple lattice units are stacked, and each layer of lattice units contains multiple unit cells. When any two adjacent unit cells in each layer are projected onto the same horizontal plane, a rhomboid intersection area is formed between them, and the line connecting the centers of the two unit cells in the horizontal plane divides the rhomboid intersection area into two symmetrical triangles. When any three adjacent unit cells in each layer are projected onto the same horizontal plane, a rhomboid intersection area is formed between any two of them, and the line connecting the centers of the three unit cells in the horizontal plane forms a triangle. When any two adjacent lattice units in any layer are projected onto the same horizontal plane, they overlap. Each unit cell includes a vertically arranged central rod, and multiple supporting rods radiate outward from the two ends of the central rod, with the angle between adjacent supporting rods being the same. The central rod is the center of the unit cell when it is projected onto the horizontal plane. There are six support rods on the same end of the central rod. Some of the support rods are set perpendicular to the central rod and are horizontal support rods. Other support rods are set at an angle to the central rod and are oblique support rods. The horizontal support rods serve as common support rods between two adjacent unit cells and also serve as dividing lines that divide the diamond-shaped intersection area into two symmetrically arranged triangles. The positions of the horizontal support rods connected to both ends of the central rod are one-to-one, and the positions of the diagonal support rods connected to both ends of the central rod are one-to-one. Among them, the axes of the two diagonal support rods located at the corresponding positions at both ends of the central rod extend in a direction away from each other. Two inclined support rods connected at corresponding positions at both ends of the central rod are connected by a vertical connecting rod, and the axial direction of the vertical connecting rod is parallel to the axial direction of the central rod. At least one vertical connecting rod is shared between two adjacent unit cells on the same horizontal plane.

2. The multi-triangular lattice of tension-bending coupling according to claim 1, characterized in that, In the intersecting region arranged in a rhombus shape, the four sides are two oblique support rods located at the same end of the central rod in two adjacent unit cells, while the common support rod serves as the common side that divides the intersecting region into two symmetrical triangles.

3. The multi-triangular lattice of tension-bending coupling according to claim 1, characterized in that, Among the multiple support rods at the same end of the central rod, the horizontal support rods and the diagonal support rods are arranged at intervals.

4. The multi-triangular lattice of tension-bending coupling according to claim 1, characterized in that, When six support rods radiate outward from each end of the central rod, there are three diagonal support rods at each end of the central rod. These support rods form three frame-shaped brackets in different vertical planes through vertical connecting rods. Each frame-shaped bracket is arranged in a trapezoidal structure. The upper ends of the three trapezoidal frame-shaped brackets share a central rod, and the lower ends of the three trapezoidal frame-shaped brackets are corresponding vertical connecting rods. The two sides of each trapezoidal frame-shaped bracket are two diagonal support rods at the corresponding positions at both ends of the central rod.

5. A multi-triangular lattice with tension-bending coupling according to claim 4, characterized in that, The midpoint of the vertical connecting rod of each trapezoidal frame support is connected to both ends of the central rod by diagonal connecting rods, dividing the entire trapezoidal frame support into three triangles.

6. A multi-triangular lattice with tension-bending coupling according to claim 4, characterized in that, The horizontal support rod, the diagonal support rod, the central rod, and the diagonal connecting rod are all of equal length and diameter. The vertical connecting rod is twice the length of the central rod, and its diameter is the same as that of the central rod.

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