Multi-frequency shared variable-stiffness modular foldable antenna supporting mechanism

Abstract

The invention, which relates to the technical field of the space deployable antenna, provides a multi-frequency shared variable-stiffness modular foldable antenna supporting mechanism comprising a central module, a driving module and a peripheral module. The working frequency bands of the central module and the peripheral module are different, and the working efficiency of the antenna is ensured while multi-frequency sharing of the antenna is realized by changing the surface precision of the central module and the peripheral module. The structure that the center module is closed and the peripheral module is open is adopted, so that the rigidity of the center module is effectively enhanced. The motor drives the disc chuck to drive the device to be folded and unfolded, and the adjustability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of space deployable antennas, and in particular to a multi-frequency common type variable stiffness modular foldable antenna support mechanism. Background Art

[0002] In the field of space antennas, a multi-band, shared, variable-rigidity, modular, deployable antenna support structure allows for both folding and unfolding of the antenna, thereby increasing its reflective surface in space while reducing its collapsed volume. After the truss-type deployable antenna is deployed, the antenna support truss requires tensioning and securing the metal mesh.

[0003] However, the antenna connected by the tensioning cable has low rigidity and poor stability after being unfolded. It is prone to vibration during operation, which affects the reflection effect of the antenna. Summary of the Invention

[0004] In response to the technical problems mentioned in the above background technology, a multi-band common type variable stiffness modular foldable antenna support mechanism is provided. The present invention provides a multi-band common type variable stiffness modular foldable antenna support mechanism, which increases the stiffness of the antenna after deployment, improves the stability during operation, and ensures the antenna's reflection effect.

[0005] The technical means adopted in the present invention are as follows:

[0006] A multi-frequency common variable stiffness modular foldable antenna support mechanism, including: a central module, a driving module, a peripheral module, a tensioning cable, and a fixed disc;

[0007] The central module includes: an upper main beam connection block, a lower main beam connection block, a main beam, a side beam, an upper equal side bar, a lower equal side bar, an upper vertex connection block, a lower vertex connection block, a half bar and a half bar connection block. The lower part of the upper main beam connection block is fixed to the main beam by a pin connection, and the lower part of the main beam is fixed to the lower main beam connection block by a pin connection.

[0008] The two bolts are connected by a pin, and the pin holes of the two pin connections are parallel and of the same size; the upper main beam connecting block and the lower main beam connecting block each have two hinge holes; the two hinge holes of the upper main beam connecting block are respectively hinged to one end of the upper equal side rod; the two hinge holes of the lower main beam connecting block are respectively hinged to one end of the lower equal side rod; the other end of the upper equal side rod is hinged to the middle outer node of the upper vertex connecting block; the other end of the lower equilateral rod is hinged to the middle node of the lower vertex connecting block; the upper vertex connecting block is pin-connected to one end of the side beam; the lower vertex connecting block is pin-connected to the other end of the side beam, and the two pin holes located on the side beam are parallel and equal in size; the two sides of the upper vertex connecting block are respectively hinged to the half rod; the two sides of the lower vertex connecting block are respectively hinged to the half rod; the other end of the half rod is respectively hinged to the two ends of the half rod connecting block;

[0009] The driving module includes: a faceplate, an oblique connecting rod, an oblique rod connecting block, an oblique web rod and a corner connecting block; the faceplate is coaxial with the main beam; the upper part of the faceplate is hinged to one end of the oblique connecting rod; the other end of the oblique connecting rod is hinged to the middle node of the oblique rod connecting block; the lower part of the oblique rod connecting block is hinged to the lower main beam connecting block; the upper part of the oblique rod connecting block is hinged to one end of the oblique web rod; the other end of the oblique web rod is connected to the corner connecting block through a pin; the other end of the corner connecting block is hinged to the middle inner node of the upper vertex connecting block;

[0010] The peripheral module includes: an upper main beam connecting block, a lower main beam connecting block, a main beam, a side beam, an upper equilateral rod, a lower equilateral rod, an upper vertex connecting block and a lower vertex connecting block; the lower part of the upper main beam connecting block is fixed to the main beam by a pin connection; the lower part of the main beam is fixed to the lower main beam connecting block by a pin connection; the upper main beam connecting block and the lower main beam connecting block each have two hinge holes; the two hinge holes of the upper main beam connecting block are respectively hinged to one end of the upper equilateral rod; the two hinge holes of the lower main beam connecting block are respectively hinged to one end of the lower equilateral rod; the other end of the upper equilateral rod is hinged to the middle outer node of the upper vertex connecting block; the other end of the lower equilateral rod is hinged to the middle node of the lower vertex connecting block; the upper vertex connecting block is pin-connected to one end of the side beam; the lower vertex connecting block is pin-connected to the other end of the side beam, and the two pin holes arranged in the side beam are parallel and equal in size;

[0011] The stability of the deployment of the peripheral modules is achieved by driving the slow-release rope through a motor provided in the slow-release device;

[0012] The fixed disc is provided with three holes for fixing the side beams, which serve to fix the relative positions of the central module and the peripheral modules.

[0013] Furthermore, the faceplate is slidably mounted on the outside of the main beam; the faceplate and the lower vertex connecting block are connected by the faceplate height to limit the sliding limit position of the faceplate.

[0014] Furthermore, the middle node of the upper vertex connecting block has an inner hinge and an outer hinge; the upper plane of the upper vertex connecting block is horizontal, and the rotation direction of the inner hinge and the outer hinge is vertical; the upper vertex connecting block has three hinge nodes; the hinge nodes on both sides form an angle of 60° with the middle node; and the rotation direction of the hinges on both sides is horizontal.

[0015] Furthermore, the upper equilateral rod is connected to the outer hinge of the middle node of the upper vertex connection block; the inner hinge of the middle node of the upper vertex connection block is hinged to the corner connection.

[0016] Furthermore, the nodes on both sides of the upper vertex connecting block are hinged to the half-rod connecting block in the horizontal direction.

[0017] Furthermore, the rotation direction of the hinges of the nodes on both sides of the lower vertex connection block is a vertical direction, and the nodes on both sides of the lower vertex connection block are hinged to the half rod.

[0018] Furthermore, the other end of any one of the half-rods is connected to the nearest other half-rod via the half-rod connecting block; and the half-rods and the half-rod connecting block are connected in a hinged manner.

[0019] Furthermore, the central module and the peripheral modules are connected via the fixed disc.

[0020] Furthermore, the central module is a closed-loop structure, and the peripheral modules are open-loop structures.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention provides a variable stiffness concept. By changing the structure of the central module, the central module bears a larger load and has a higher stiffness, while the peripheral modules bear a smaller load and have a lower stiffness. While enhancing the overall structural stiffness of the antenna, the mass of the antenna is reduced as much as possible, which is suitable for the current development trend of large-scale antenna structures.

[0023] 2. Based on the traditional modular deployable antenna, the present invention changes the surface accuracy of the central module and the peripheral modules to make the operating frequency bands of the central module and the peripheral modules different, thereby achieving multi-frequency sharing of the antenna while ensuring the working efficiency of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0025] Figure 1 This is a schematic structural diagram of the multi-frequency common type variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when unfolded;

[0026] Figure 2 This is a schematic structural diagram of a multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when half-expanded;

[0027] Figure 3 This is a structural diagram of the multi-frequency common type variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when folded;

[0028] Figure 4 This is a structural schematic diagram of the central module of the multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when it is unfolded;

[0029] Figure 5 This is a schematic structural diagram of a central module of a multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when half-expanded;

[0030] Figure 6 This is a structural diagram of a central module of a multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when folded;

[0031] Figure 7 This is a schematic structural diagram of the peripheral modules of the multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when unfolded;

[0032] Figure 8 This is a schematic structural diagram of a semi-expanded peripheral module of a multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention;

[0033] Figure 9 This is a schematic structural diagram of the multi-frequency common type variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention when the peripheral modules are folded;

[0034] Figure 10 This is a schematic structural diagram of a driving module of a multi-frequency common type variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention;

[0035] Figure 11A schematic structural diagram of a fixed disk of a multi-frequency common variable stiffness modular foldable antenna support mechanism disclosed in an embodiment of the present invention;

[0036] In the figure: 100, a multi-frequency common type variable stiffness modular foldable antenna support mechanism;

[0037] 1. Central module; 2. Peripheral module; 3. Drive module; 4. Upper main beam connection block; 5. Main beam; 6. Lower main beam connection block; 7. Upper equilateral rod; 8. Lower equilateral rod; 9. Upper vertex connection block; 10. Lower vertex connection block; 11. Half rod; 12. Half rod connection block; 13. Side beam; 14. Corner connection block; 15. Diagonal web rod; 16. Diagonal rod connection block; 17. Diagonal connecting rod; 18. Flower plate; 19. Fixed disc; 20. Side beam mounting hole. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0042] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0043] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0044] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0045] Example 1

[0046] The present invention provides a multi-frequency common type variable stiffness modular foldable antenna support mechanism 100, please refer to Figures 1-6The central module 1 includes: an upper main beam connection block 4, a lower main beam connection block 6, a main beam 5, a side beam 12, an upper equilateral rod 7, a lower equilateral rod 8, an upper vertex connection block 9, a lower vertex connection block 10, a half rod 11 and a half rod connection block 12. The lower part of the upper main beam connection block 4 is fixed to the main beam 5 by a pin connection, and the lower part of the main beam 5 is fixed to the lower main beam connection block 6 by a pin connection; and the pin holes of the above two pin connections are on the main beam 5, parallel and of the same size; the two nodes of the upper main beam connection block 4 are respectively hinged to one end of the upper equilateral rod 7, the two nodes of the lower main beam connection block 6 are respectively hinged to one end of the lower equilateral rod 8, the other end of the upper equilateral rod 7 is hinged to the middle outer node of the upper vertex connection block 9, and the other end of the lower equilateral rod 8 is hinged to the middle outer node of the upper vertex connection block 9. The end is hinged to the middle node of the lower vertex connecting block 10, the upper vertex connecting block 9 is pin-connected to one end of the side beam 13, the lower vertex connecting block 10 is pin-connected to the other end of the side beam 13, and the two pin holes located on the side beam 13 are parallel and equal in size, the two sides of the upper vertex connecting block 9 are respectively hinged to the half rod 11, the two sides of the lower vertex connecting block 10 are respectively hinged to the half rod 11, and the other end of the half rod 11 is respectively hinged to the two ends of the half rod connecting block 12; the driving module 3 includes a disc 18, an oblique connecting rod 17, an oblique rod connecting block 16, an oblique web bar 15 and a corner connecting block 14, the disc 18 is coaxial with the main beam 5, the top of the disc 18 is hinged to one end of the oblique connecting rod 17, the other end of the oblique connecting rod 17 is hinged to the middle of the oblique rod connecting block 16 The nodes are hinged, the lower part of the diagonal rod connecting block 16 is hinged to the lower main beam connecting block 6, the upper part of the diagonal rod connecting block 16 is hinged to one end of the diagonal web member 15, the other end of the diagonal web member 15 is connected to the corner connecting block 14 through a pin shaft, and the other end of the corner connecting block 14 is hinged to the middle inner node of the upper vertex connecting block 9; the peripheral module 2 includes an upper main beam connecting block 4, a lower main beam connecting block 6, a main beam 5, a side beam 13, an upper equilateral rod 7, a lower equilateral rod 8, an upper vertex connecting block 9 and a lower vertex connecting block 10, the lower part of the upper main beam connecting block 4 is fixed to the main beam 5 by a pin connection, and the lower part of the main beam 5 is fixed to the lower main beam connecting block 6 by a pin connection; and the pin holes of the above two pin connections are on the main beam, parallel and of the same size; the two nodes of the upper main beam connecting block 4 are respectively It is hinged to one end of the upper equilateral rod 7, and the two nodes of the lower main beam connecting block 6 are respectively hinged to one end of the lower equilateral rod 8. The other end of the upper equilateral rod 7 is hinged to the middle outer node of the upper vertex connecting block 9, and the other end of the lower equilateral rod 8 is hinged to the middle node of the lower vertex connecting block 10. The upper vertex connecting block 9 is pin-connected to one end of the side beam 13, and the lower vertex connecting block 10 is pin-connected to the other end of the side beam 13, and the two pin holes located on the side beam 13 are parallel and equal in size; the tensioning cable is controlled by the driving module of the central module, and the stability of the deployment of the peripheral module is achieved by driving the slow-release rope through the motor; the fixed disc 19 has three side beam mounting holes 20 for fixing the side beams, which are used to fix the relative position of the central module and the peripheral module.

[0047] The multi-band, common, variable-stiffness, modular, foldable antenna support mechanism 100 of the present invention has two antenna positions: an extended state and a retracted state. When the antenna moves from the extended state to the retracted state, a motor drives the faceplate 18 to slide upward along the main beam 5. The diagonal connecting rod 17 drives the diagonal connecting block 16 to rotate counterclockwise. Simultaneously, the diagonal connecting block 16 drives the diagonal brace 15 to rotate clockwise. The diagonal brace 15 drives the corner connecting block 14 and the upper vertex connecting block 9 to rotate clockwise simultaneously, achieving full retraction of the antenna. After the antenna is fully retracted, the faceplate 18 is locked, thereby securing the retracted position. After the antenna is launched into space in the retracted position, the faceplate 18 is unlocked and, driven by the motor, slides downward along the main beam 5. Similarly, the diagonal connecting rod 17 drives the diagonal connecting block 16 to rotate clockwise. Simultaneously, the diagonal brace 15, driven by the diagonal connecting block 16, rotates counterclockwise, driving the corner connecting block 14 and the upper vertex connecting block 9 to rotate counterclockwise simultaneously, achieving full deployment of the antenna. After the antenna is fully deployed, the pre-tensioned state is maintained under the joint action of the tensioning cable, the disc 18 and the half rod 11, and the drive mechanism is locked by the baffle on the diagonal rod connecting block 16, and the drive mechanism is connected to each module, thereby maintaining the stability of the entire mechanism.

[0048] The faceplate 18 is slidably mounted on the outside of the main beam 5, ensuring that the faceplate 18 can slide smoothly along the main beam 5 and simultaneously drive the drive device to complete the expansion and contraction of the antenna. In this application, the height of the faceplate itself can be adjusted by design. When fully expanded, the bottom of the faceplate contacts the lower main beam connecting block to prevent excessive sliding of the faceplate.

[0049] In this specific embodiment, the height of the faceplate 18 is used to limit the sliding limit position of the faceplate 18 between the faceplate 18 and the lower vertex connecting block 10, so as to avoid the faceplate 18 being unable to be positioned on the main beam 5 and affecting the deployment of the antenna, thereby ensuring the accuracy of the antenna during deployment.

[0050] Specifically, the upper main beam connecting block 4 and the lower main beam connecting block 6 are connected to the main beam 5 by pin connection. Through the pin connection, the relative positions of the upper main beam connecting block 4, the lower main beam connecting block 6 and the main beam 5 are fixed to prevent relative sliding and improve structural stability.

[0051] It should also be noted that the two pin holes of the main beam 5 are parallel and equal in size, so as to avoid the antenna being unable to expand and contract normally due to the side surfaces of the upper main beam connecting block 4 and the lower main beam connecting block 6 not being on the same plane, thereby ensuring the reliability of the antenna expansion.

[0052] It is also important to note that the middle node of the upper vertex connecting block 9 has an inner hinge and an outer hinge. The upper plane of the upper vertex connecting block 9 is horizontal, and the rotation direction of the inner and outer hinges is vertical. Similarly, on the upper vertex connecting block 9, the rotation direction of the hinges of the two side nodes at a 60° angle to the middle node is horizontal. This ensures that the antenna can be smoothly deployed while saving space.

[0053] More specifically, upper equilateral rod 7 is connected to an external hinge at the midpoint of upper vertex connecting block 9, while an internal hinge at the midpoint of upper vertex connecting block 9 is hinged to corner connecting block 14. The internal and external hinges of upper vertex connecting block 9 ensure that upper equilateral rod 7 and diagonal web rod 15 do not interfere when the antenna is retracted, thereby improving the structural stability and operational reliability of the antenna when deployed.

[0054] In addition, the upper vertex connecting block 9 is connected to the side beam 13 through a pin at the bottom, and the lower vertex connecting block 10 is connected to the side beam 13 through a pin at the top. The pin connection fixes the relative positions of the upper vertex connecting block 9, the lower vertex connecting block 10 and the side beam 13, and the two pin holes of the side beam 13 are parallel and equal in size to prevent relative sliding and improve structural stability.

[0055] Furthermore, the nodes on either side of the upper vertex connecting block 9 are hinged horizontally to the half-rod 11, while the hinges on either side of the lower vertex connecting block 6 rotate vertically, and the nodes on either side of the lower vertex connecting block 6 are hinged to the half-rod 11. The upper and lower vertex connecting blocks 9, 10, and the half-rod 11 are hinged in different directions, ensuring that the half-rod 11 does not interfere when the antenna is retracted, conserving space, and ensuring the accuracy of the antenna's deployment.

[0056] Correspondingly, the other ends of the half-rods 11 are connected to the nearest other half-rods 11 via half-rod connecting blocks 12, and the half-rods 11 and the half-rod connecting blocks 12 are hinged. Through the half-rod connecting blocks 12, the antenna can be deployed at different angles, improving the smoothness of the antenna deployment.

[0057] Furthermore, the central module 1 and the peripheral modules 2 are connected via a fixed disc 19. This ensures the relative position between the modules, allowing the central module 1 and the peripheral modules 2 to be deployed and retracted synchronously.

[0058] In this specific embodiment, based on the principle that a high-precision antenna surface is suitable for low-frequency operation and a low-precision antenna surface is suitable for high-frequency operation, it is adapted to operate in different frequency bands, thereby achieving multi-frequency sharing of the antenna.

[0059] It should also be emphasized that after full deployment, the central module 1 will be subject to pressure from multiple peripheral modules 2, so the central module 1 should have greater rigidity than the peripheral modules 2. In the central module 1 of the present invention, the upper vertex connecting blocks 9 and the lower vertex connecting blocks 10 are connected by half-rods 11 and half-rod connecting blocks 12. At this point, the central module 1 can be regarded as a closed-loop hexagonal pyramid composed of six closed-loop triangular pyramids. Because closed-loop structures have strong anti-interference capabilities, in order to achieve the required rigidity and weight, the central module 1 of the present invention is a closed-loop structure, while the peripheral modules 2 are open-loop structures.

[0060] Example 2

[0061] This embodiment provides a detector, including the multi-frequency common type variable stiffness modular foldable antenna support mechanism 100 of the first embodiment.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-frequency common variable stiffness modular foldable antenna support mechanism, characterized in that: include: Central module, drive module, peripheral module, tensioning cable and fixed disc; The central module includes: an upper main beam connection block, a lower main beam connection block, a main beam, a side beam, an upper equal side bar, a lower equal side bar, an upper vertex connection block, a lower vertex connection block, a half bar and a half bar connection block. The lower part of the main beam connection block is fixed to the main beam by a pin connection, and the lower part of the main beam is fixed to the lower main beam connection block by a pin connection. The two bolts are connected by a pin, and the pin holes of the two pin connections are parallel and of the same size; the upper main beam connecting block and the lower main beam connecting block each have two hinge holes; the two hinge holes of the upper main beam connecting block are respectively hinged to one end of the upper equal side rod; the two hinge holes of the lower main beam connecting block are respectively hinged to one end of the lower equal side rod; the other end of the upper equal side rod is hinged to the middle outer node of the upper vertex connecting block; the other end of the lower equilateral rod is hinged to the middle node of the lower vertex connecting block; the upper vertex connecting block is pin-connected to one end of the side beam; the lower vertex connecting block is pin-connected to the other end of the side beam, and the two pin holes located on the side beam are parallel and equal in size; the two sides of the upper vertex connecting block are respectively hinged to the half rod; the two sides of the lower vertex connecting block are respectively hinged to the half rod; the other end of the half rod is respectively hinged to the two ends of the half rod connecting block; The driving module includes: a faceplate, an oblique connecting rod, an oblique rod connecting block, an oblique web rod and a corner connecting block; the faceplate is coaxial with the main beam; the upper part of the faceplate is hinged to one end of the oblique connecting rod; the other end of the oblique connecting rod is hinged to the middle node of the oblique rod connecting block; the lower part of the oblique rod connecting block is hinged to the lower main beam connecting block; the upper part of the oblique rod connecting block is hinged to one end of the oblique web rod; the other end of the oblique web rod is connected to the corner connecting block through a pin; the other end of the corner connecting block is hinged to the middle inner node of the upper vertex connecting block; The peripheral module includes: an upper main beam connecting block, a lower main beam connecting block, a main beam, a side beam, an upper equilateral rod, a lower equilateral rod, an upper vertex connecting block and a lower vertex connecting block; the lower part of the upper main beam connecting block is fixed to the main beam by a pin connection; the lower part of the main beam is fixed to the lower main beam connecting block by a pin connection; the upper main beam connecting block and the lower main beam connecting block each have two hinge holes; the two hinge holes of the upper main beam connecting block are respectively hinged to one end of the upper equilateral rod; the two hinge holes of the lower main beam connecting block are respectively hinged to one end of the lower equilateral rod; the other end of the upper equilateral rod is hinged to the middle outer node of the upper vertex connecting block; the other end of the lower equilateral rod is hinged to the middle node of the lower vertex connecting block; the upper vertex connecting block is pin-connected to one end of the side beam; the lower vertex connecting block is pin-connected to the other end of the side beam, and the two pin holes arranged in the side beam are parallel and equal in size; The stability of the deployment of the peripheral modules is achieved by driving the slow-release rope through a motor provided in the slow-release device; The fixed disc is provided with three holes for fixing the side beams, which serve to fix the relative positions of the central module and the peripheral modules.

2. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The faceplate is slidably mounted on the outside of the main beam; The height of the faceplate is used to limit the sliding limit position of the faceplate between the faceplate and the lower vertex connecting block.

3. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The middle node of the upper vertex connecting block has an inner hinge and an outer hinge; the upper plane of the upper vertex connecting block is horizontal, and the rotation direction of the inner hinge and the outer hinge is vertical; the upper vertex connecting block has three hinge nodes; the hinge nodes on both sides form an angle of 60° with the middle node; and the rotation direction of the hinges on both sides is horizontal.

4. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The upper equilateral rod is connected to the outer hinge of the middle node of the upper vertex connection block; the inner hinge of the middle node of the upper vertex connection block is hinged to the corner connection.

5. The multi-frequency common type variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The nodes on both sides of the upper vertex connection block are hinged to the half-rod connection block in the horizontal direction.

6. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The rotation direction of the hinges of the nodes on both sides of the lower vertex connection block is the vertical direction, and the nodes on both sides of the lower vertex connection block are hinged to the half rod.

7. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The other end of any one of the half rods is connected to the nearest other half rods via the half rod connecting block; the half rods and the half rod connecting block are connected in a hinged manner.

8. The multi-frequency common variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The central module and the peripheral modules are connected via the fixed disc.

9. The multi-frequency common type variable stiffness modular foldable antenna support mechanism according to claim 1, characterized in that: The central module is a closed-loop structure, and the peripheral modules are open-loop structures.

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