Large-scale multi-module cable-rib tensioned antenna structure

Abstract

A large-scale multi-module cable-rib tensioned antenna mechanism comprises a multi-stage linkage module unit, wherein the multi-stage linkage module unit comprises an upper bracket, a lower bracket, a screw pair, a linkage rod, a cable-tie rod and a support seat, and also comprises a module unit interconnection mechanism; after the multi-stage linkage module unit is unfolded, the ends of the six groups of cable-tie rods are connected to form a regular hexagonal configuration; the module unit interconnection mechanism comprises a locking mechanism and a joint hinge, and any two adjacent multi-stage linkage module units are connected through the joint hinge, and any two adjacent multi-stage linkage module units are locked when the modular splicing tensioned antenna mechanism is unfolded and released when folded through the locking mechanism. The invention has a compact structure, high unfolding reliability, can meet the requirements of unfolding aperture and focal diameter ratio, and can adapt to the development trend of satellite platforms.

Description

Technical Field

[0001] The invention relates to an antenna mechanism, in particular to a large-scale multi-module cable-rib tensioned antenna mechanism. Background Art

[0002] At present, with the improvement of space application requirements, the research on new deployable structures with super-large size, high folding rate and light weight has become an important challenge in the field of spacecraft technology. Foreign countries with developed aerospace industries have successfully applied space folding antenna mechanisms in the field of aerospace engineering, which has important research value and good application background. The tensioned folding mechanism is a new type of deployable mechanism that has appeared internationally in recent years. However, the folding size of the tensioned folding mechanism is too large, and it is not easy to carry out multi-module networking, which restricts the application and development of the tensioned deployment mechanism in space antennas. CN109659661A discloses a cable-rod tensioned annular deployable antenna mechanism, which mainly adopts a double-layer annular truss structure and a torsion spring to achieve drive, and it is difficult to expand to form an antenna mechanism with a larger caliber. CN107939928A discloses a space folding mechanism connected by a flexible hinge imitating a mimosa. The flexible hinge connects two deployable modules, and different large-scale folding mechanisms are formed by an array. However, it is difficult to carry out layered networking, and it is impossible to meet the requirements of the deployment caliber and focal diameter ratio.

[0003] In general, the development of the tensioned deployment mechanism has the following shortcomings: There is currently no large-scale tensioned antenna mechanism in China. The tensioned antenna mechanism cannot currently be networked in modules, the scalability of the mechanism is not high, and it is difficult to adapt to the needs of larger-caliber antennas. Summary of the invention

[0004] The present invention is to overcome the shortcomings of the prior art and provide a large-scale multi-module cable-rib tensioned antenna mechanism. The antenna mechanism has high deployment reliability and can meet the requirements of deployment aperture and focal diameter ratio.

[0005] The technical solution of the present invention is: a modular splicing tensioned antenna mechanism, comprising a multi-stage linkage module unit, wherein the multi-stage linkage module unit comprises an upper bracket, a lower bracket, a lead screw pair, a connecting rod, a cable tie rod and a support seat; a lower bracket is installed on the support seat, and the two ends of the lead screw of the lead screw pair are rotatably arranged on the upper bracket and the lower bracket, the motor is installed on the upper bracket, and the output end of the motor is connected to the lead screw, and six groups of connecting rods and six groups of cable tie rods are arranged circumferentially on the nut of the lead screw pair, the connecting rods are respectively hinged to the nut and the lower bracket, and the cable tie rods are respectively hinged to the upper bracket and the connecting rod, and a connected cable is provided between the support seat and the corresponding cable tie rod, and a cable is connected between adjacent cable tie rods, and a cable is installed in each cable tie rod; it also comprises a module unit interconnection mechanism, and the ends of the six groups of cable tie rods after the multi-stage linkage module unit is unfolded are connected to form a regular hexagonal configuration, and the cable tie rods between the unfolded S multi-stage linkage module units are connected and spliced ​​into an N-layer topological configuration along the radial topology and along the circumferential array through the module unit interconnection mechanism;

[0006] in,

[0007] The module unit interconnection mechanism includes a locking mechanism and a joint hinge. Any two adjacent multi-stage linkage module units are connected through the joint hinge. Any two adjacent multi-stage linkage module units can be locked when the modular splicing tensioned antenna mechanism is unfolded and released when it is folded through the locking mechanism.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention realizes the actual demand of large-aperture parabolic antennas by splicing a number of identical multi-stage linkage module units, and is suitable for networking of large-aperture parabolic antennas. The benefit brought is that the universality and scalability of the entire mechanism are improved. For example, to increase the area of ​​the antenna, the corresponding number of antenna modules can be directly added according to the demand. The antenna mechanism of the present invention has modular characteristics, can meet the requirements of the expansion aperture and focal diameter ratio, and can be assembled into a large antenna mechanism. It can adapt to the development trend of satellite platforms.

[0010] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments: BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of folding the large-scale multi-module cable-rib tensioned antenna mechanism of the present invention;

[0012] Figure 2 It is a schematic diagram of the deployment of a large-scale multi-module cable-rib tensioned antenna mechanism of the present invention;

[0013] Figure 3 It is a three-dimensional schematic diagram of the unfolded multi-level linkage module unit;

[0014] Figure 4 for Figure 2 The enlarged view of point E;

[0015] Figure 5 for Figure 4 A local enlarged view of point F;

[0016] Figure 6 for Figure 4 A local enlarged view of the H position;

[0017] Figure 7 It is a schematic diagram of the three-dimensional structure of the present invention containing a cable;

[0018] Figure 8 A schematic diagram of the three-dimensional structure of the multi-stage linkage module unit after it is unfolded as seen from another direction;

[0019] Fig. 9 It is a schematic diagram of the folding of the multi-stage linkage module unit;

[0020] Fig.10 It is a structural schematic diagram of the connecting rod;

[0021] Fig.11 is a structural schematic diagram of a cable tie rod;

[0022] Fig.12 Schematic diagram of a planar four-bar mechanism constructed with double-bar assemblies and joints as cable-stayed rods;

[0023] Fig.13 for Fig.11 D-direction view;

[0024] Fig.14 for Figure 8 K-direction view;

[0025] Fig.15 Schematic diagram of unfolding and locking hinge;

[0026] Fig.16 Schematic diagram of the cable net layout. DETAILED DESCRIPTION

[0027] like Figure 1-Figure 3As shown, the large-scale multi-module cable-rib tensioned antenna mechanism of this embodiment comprises a multi-stage linkage module unit A, wherein the multi-stage linkage module unit A comprises an upper bracket 1, a lower bracket 2, a screw pair, a connecting rod 4, a cable tie rod 5 and a support seat 6; the support seat 6 is mounted with the lower bracket 2, the two ends of the screw 31 of the screw pair are rotatably arranged on the upper bracket 1 and the lower bracket 2, the motor is mounted on the upper bracket 1, the output end of the motor is connected to the screw 31, six groups of connecting rods 4 and six groups of cable tie rods 5 are circumferentially arranged on the nut 32 of the screw pair, the connecting rod 4 is hinged to the nut 32 and the lower bracket 2 respectively, the cable tie rod 5 is hinged to the upper bracket 1 and the connecting rod 4 respectively, a connected cable 7 is arranged between the support seat 6 and the corresponding cable tie rod 5, a cable 7 is connected between adjacent cable tie rods 5, and a cable 7 is installed in each cable tie rod 5;

[0028] It also includes a module unit interconnection mechanism, where the ends of the six groups of cable tie rods 5 after the multi-stage linkage module units are deployed are connected to form a regular hexagonal configuration, and the cable tie rods 5 between the S multi-stage linkage module units after deployment are connected and spliced ​​into an N-layer topological configuration along the radial topology and along the circumferential array through the module unit interconnection mechanism 8;

[0029] in, i is a natural number;

[0030] The module unit interconnection mechanism includes a locking mechanism 8-1 and a joint hinge 8-2. Any two adjacent multi-stage linkage module units A are connected through the joint hinge 8-2. Any two adjacent multi-stage linkage module units A are locked when the modular splicing tension antenna mechanism is unfolded and released when it is folded through the locking mechanism 8-1. S represents the number of multi-stage linkage module units, and N represents the number of circumferentially extended layers of the multi-stage linkage module units.

[0031] This embodiment follows the design concept of the honeycomb, that is, the networking concept of the central module unit + the peripheral module unit is adopted. Since the ends of the six groups of cable rods 5 after the single multi-stage linkage module unit A is unfolded are connected to form a regular hexagonal configuration, the peripheral multiple multi-stage linkage module units are layered and expanded around the central multi-stage linkage module unit to form an N-layer configuration along the radial topology and the circumferential array. The cable rods 5 of the central multi-stage linkage module unit are connected to the six multi-stage linkage module units of the second layer through the module unit interconnection mechanism 8, and the 6 multi-stage linkage module units of the second layer are connected to the 12 multi-stage linkage module units of the third layer through the module unit interconnection mechanism 8, and so on, to construct a modular splicing tensioned antenna mechanism. Take the third layer as an example: among the six multi-stage linkage module units A of the second layer, each multi-stage linkage module unit A has three cable rods 5 remaining, and the adjacent two cable rods 5 of the current multi-stage linkage module unit A and its adjacent multi-stage linkage module unit A are respectively connected to the two cable rods 5 of a multi-stage linkage module unit A of the third layer through the module unit interconnection mechanism 8, and the remaining one cable rod 5 of the current multi-stage linkage module unit A is separately connected to one cable rod 5 of a multi-stage linkage module unit A of the third layer through the module unit interconnection mechanism 8, so that the six multi-stage linkage module units A of the second layer are connected to the 12 multi-stage linkage module units A of the third layer, and the arrangement is similar in radial and circumferential directions to form a modular spliced ​​tensioned antenna mechanism.

[0032] from Figure 1-Figure 3 It can be seen that each peripheral multi-stage linkage module unit A provides three cable tie rods 5 for connecting other multi-stage linkage module units A, and the remaining three cable tie rods 5 provide rigid support points for the peripheral mesh surface after the mechanism is deployed. This method can not only ensure the rigidity of the interconnection between the module units, but also provide sufficient rigid support points for the support mesh surface to ensure the mesh surface accuracy.

[0033] The antenna mechanism is driven by a lead screw, and the lead screw is arranged as follows: Figure 3 The adjacent radial cable pull rods 5 are linked to each other through the screw pair and the connecting rod 4, and the motor is connected to the screw pair to realize driving and control.

[0034] During the deployment of the antenna mechanism, all multi-stage linkage module units A are deployed simultaneously. The deployment process of the antenna mechanism is to unlock the mechanism, then deploy the cable pull rods 5 of all multi-stage linkage module units A, and finally deploy the mechanism by driving the connecting rods 4 of all modules with the lead screw pairs;

[0035] As an example: Figure 4-Figure 5As shown, the locking mechanism 8-1 includes a locking block 1 8-11, a locking block 2 8-12, a locking hook 8-13 and a torsion spring; the locking block 2 8-12 is rotatably connected to the locking hook 8-13, and a torsion spring is arranged between the locking block 2 8-12 and the locking hook 8-13 to resist the two. After the antenna mechanism is fully unfolded, the locking block 1 8-11 and the locking block 2 8-12 are locked by the locking hook 8-13.

[0036] As an embodiment, the locking block 1 8-11 and the locking block 2 8-12 are respectively provided with a limit rod 8-14, and after the antenna mechanism is fully deployed, the two limit rods 8-14 abut against each other. With such arrangement, after the antenna mechanism is fully deployed, positioning is achieved through the two limit rods 8-14.

[0037] Preferably, if Fig.10 As shown, the linkage 4 comprises a linkage 1 41, a linkage 2 42 and a linkage 3 43; the two ends of the linkage 3 43 are respectively hinged to the linkage 2 42 and the cable tie 5, the linkage 2 42 is hinged to the nut 32, and the two ends of the linkage 1 41 are respectively hinged to the lower bracket 2 and the linkage 3 43. The movement change of the linkage 4 is shown in FIG. Fig. 9 and Fig.10 As shown. Fig. 9 As shown, when the lead screw drives the nut 32 to move downward, the linkage rod 4 moves to drive the cable pull rod 5 to close; Fig.10 As shown, when the lead screw drives the nut 32 to move upward, the connecting rod 4 moves to drive the cable rod 5 to unfold.

[0038] Another embodiment based on the above scheme, as Figure 11-Figure 12 As shown, each of the cable pull rods 5 includes an upper cable rod 51, a lower cable rod 52, a plurality of double-rod components 53 and a plurality of joints 54; two adjacent double-rod components 53 are hinged in series through joints 54, the first double-rod component 53 is hinged to the upper bracket 1 and the connecting rod 4 respectively, the double-rod component 53 and the joint 54 constitute a planar four-rod mechanism, the last double-rod component 53 and the last joint 54 are hinged to the upper cable rod 51 respectively, the upper cable rod 51 and the lower cable rod 52 are hinged, the other ends of the two lower cable rods 52 of any two adjacent multi-stage linkage module units A are connected through joint hinges 8-2, and the other ends of the two upper cable rods 51 are locked when the modular splicing tensioned antenna mechanism is unfolded and released when folded through a locking mechanism 8-1;

[0039] A cable 7 is connected between the support seat 6 and the double-rod assembly 53, between the support seat 6 and the lower cable rod 52, and between the upper cable rod 51 and the lower cable rod 52; a cable 7 is provided between the end of any upper cable rod 51, the end of the lower cable rod 52 in the cable-stayed rod 5 adjacent to it, and the double-rod assembly 53; a cable 7 is provided between the end of any lower cable rod 52, the end of the upper cable rod 51, the end of the lower cable rod 52 in the cable-stayed rod 5 adjacent to it, and the double-rod assembly 53; and a cable 7 is provided between the end of the last double-rod assembly 53, the end of the upper cable rod 51, the end of the lower cable rod 52 in the cable-stayed rod 5 adjacent to it, and the last double-rod assembly 53.

[0040] The cable-tensioned rod is configured as multiple four-bar mechanisms, which rely on the stability of the four-bar mechanism transmission to ensure the stability of the mechanism movement. The transmission between multiple double-bar components also relies on the combination of the four-bar mechanism and the joint. The vertex of the previous four-bar mechanism is connected to the vertex of the next four-bar mechanism, that is, the diagonal lines of the trapezoid formed by the vertices of the two groups of four-bar mechanisms are connected. At this time, the mutual linkage between the four-bar mechanisms, that is, the mutual linkage between the cable-tensioned rod components, can be realized to achieve modular assembly. For the convenience of clear expression and display, such as Figure 7 and Figure 8 As shown, the cable 7 is represented by a dotted line, a dashed line, and a double-dotted line, respectively.

[0041] When unlocking, the lower cable rod 52 is unfolded first, and then the entire mechanism is unfolded. The distance between the lower cable rods 52 between the multi-stage linkage module units A remains unchanged during the unfolding process, and can be directly connected using a single joint hinge 8-2. At this time, the distance between the upper cable rods 51 of two identical multi-stage linkage module units A undergoes an "increase-decrease-increase-decrease" process. In order to ensure the feasibility and reliability of the mechanism, this embodiment does not add an additional linkage mechanism to the upper cable rod 51 of the antenna mechanism, but instead uses a locking mechanism 8-1 for locking. Its structural diagram is as follows: Figure 5 and Figure 6 shown.

[0042] Another embodiment, such as Fig.12 and Fig.13 As shown, the double-rod assembly 53 includes auxiliary ribs and main ribs, which are respectively the first auxiliary rib 53-1, the first main rib 53-2, the second auxiliary rib 53-3, the second main rib 53-4, the third auxiliary rib 53-5, and the third main rib 53-6, and the joints are respectively the first joint 54-1, the second joint 54-2, and the third joint 54-3;

[0043] The first auxiliary rib bar 53-1 and the first main rib bar 53-2 are arranged in parallel up and down, the second main rib bar 53-4 and the second auxiliary rib bar 53-3 are arranged in parallel up and down, and the third auxiliary rib bar 53-5 and the third main rib bar 53-6 are arranged in parallel up and down; the first auxiliary rib bar 53-1, the first main rib bar 53-2, the first joint 54-1 and the upper bracket 1 are correspondingly hinged to form a planar four-bar mechanism, and the first main rib bar 53-2 is hinged to the connecting rod 3 43;

[0044] The second auxiliary rib bar 53-3, the second main rib bar 53-4, the first joint 54-1 and the second joint 54-2 are correspondingly hinged to form a planar four-bar mechanism, and an auxiliary driving rod 55 hinged to the first main rib bar 53-2 and the second auxiliary rib bar 53-3 is arranged between the two.

[0045] The third auxiliary rib rod 53-5, the third main rib rod 53-6, the second joint 54-2 and the third joint 54-3 are correspondingly hinged to form a planar four-bar mechanism, the upper cable rod 51 is hinged to the third joint 54-3, an auxiliary driving rod 55 hinged to the third main rib rod 53-6 and the upper cable rod 51 is arranged between the two, and the upper cable rod 51 is hinged to the lower cable rod 52;

[0046] Cables 7 are connected between the support seat 6 and the third main rib rod 53-6, between the support seat 6 and the lower cable rod 52, and between the upper cable rod 51 and the lower cable rod 52.

[0047] A cable 7 is arranged between the end of the upper cable rod 51 in any cable-stayed rod and the end of the upper cable rod 51, the end of the lower cable rod 52 in the adjacent cable-stayed rod and the third main rib rod 53-6; a cable 7 is arranged between the end of the lower cable rod 52 in any cable-stayed rod and the end of the upper cable rod 51, the end of the lower cable rod 52 in the adjacent cable-stayed rod and the third main rib rod 53-6; a cable 7 is arranged between the third main rib rod 53-6 of any cable-stayed rod and the end of the upper cable rod 51, the end of the lower cable rod 52 in the adjacent cable-stayed rod and the third main rib rod 53-6. For the convenience of clear expression and display, as shown in FIG. Figure 7 and Figure 8 As shown, the cable 7 is represented by a dotted line, a dashed line, and a double-dotted line, respectively.

[0048] The main ribs and auxiliary ribs are two sides of the parallelogram structure. Fig.13 As shown, an auxiliary driving rod 55 is connected to the end of the main rib rod, and the auxiliary driving rod 55 is also connected to the auxiliary rib rod in the next double-rod assembly to drive the movement of the next double-rod assembly and the four-bar mechanism constructed by the joint. In a four-bar mechanism, the main rib rod, the auxiliary rib rod, and the auxiliary driving rod are all connected to the joint.

[0049] like Fig.15As shown, in order to obtain a larger folding and unfolding ratio, the upper cable rod 51 and the lower cable rod 52 are unfolded by designing the unfolding locking hinge. Fig.15 As shown, among them, the spring 20, the cylindrical pin 21, the upper rod hinge 22, the torsion spring 23, the lower rod hinge 24, the deployment drive between the upper cable rod 51 and the lower cable rod 52 is driven by the torsion spring 23, and the locking method is a spring lock pin form. During the deployment of the lower cable rod 52, the cylindrical pin 21 and the spring 20 are arranged in the pin hole of the upper rod hinge 22. The spring 20 is always in a compressed state under the action of the lower rod hinge 24. One end of the spring 20 is pressed on the baffle and the other end is pressed on the cylindrical pin 21. When the lower cable rod 52 is deployed in place, the spring 20 pushes the cylindrical pin 21 to move, cooperates with the conical hole on the lower rod hinge 24, and completes the locking of the lower cable rod 52. The locking structure of this scheme is reliable, and the lower cable rod 52 can be reliably locked during deployment. In addition, the main rib rod of the multi-stage linkage modular unit is the dead point position of the four-bar mechanism when horizontally deployed, which has the effect of stabilizing and improving the structural stiffness, and the lead screw nut and the motor have self-locking properties, which ensures the stiffness of the antenna after deployment. After the upper cable rod 51 and the lower cable rod 52 are locked and limited, in order to realize the function of extending and retracting the main rib rod, the following design is made: Fig.10 The motor, the lead screw pair, the connecting rod 4 and the cable pull rod 5 are assembled.

[0050] Alternatively, if Fig.12 and Fig.13 As shown, the first joint 54-1 and the second joint 54-2 are two baffles with isosceles trapezoidal cross sections, and the second joint 54-2 is inverted. The third joint 54-3 is a baffle with a triangular cross section. On the side close to the mesh surface, a joint ball shell 56 is also installed on the upper part of the baffle to prevent the joint from scratching the mesh surface. Fig.14 As shown in the last double-bar assembly or four-bar mechanism, the auxiliary driving rod 55 connected to the main rib bar is connected to the upper cable rod 51, and the upper cable rod 51 is connected to the lower cable rod 52. When the nut drives the connecting rod to push the main rib bar outward, the third auxiliary rib bar 53-5 and the third main rib bar 53-6 form a parallelogram connecting rod mechanism through the connecting chain plate, and finally the rotation of the main rib bar is controlled by the following steps: Fig.14 The four-link hinge structure shown in FIG. realizes the scissor-like unfolding motion. Figure 2 The second layer is a structural entity model of 6 multi-level linkage module units A connected together, such as Figure 2 Shown is a schematic diagram of the antenna mechanism's full deployment process.

[0051] As an implementation method, the cables 7 are all Kevlar ropes or carbon fiber ropes. In this way, Kevlar ropes have the advantages of high temperature resistance, fire retardancy, light weight, high strength, high modulus, dimensional stability, low shrinkage, puncture resistance, wear resistance, heat resistance, chemical corrosion resistance, good mechanical properties, good dielectric properties, etc.; carbon fiber ropes have the characteristics of high strength and excellent conductivity, which is convenient for ensuring repeated deployment accuracy.

[0052] The rods in the connecting rod 4 and the cable tie rod 5 are made of carbon fiber composite materials or aviation aluminum alloy materials. In this way, the aviation aluminum alloy material has the comprehensive properties of high strength, high toughness and fatigue resistance, and the carbon fiber composite material has the characteristics of high temperature resistance, friction resistance, electrical conductivity, heat conduction, corrosion resistance and light weight.

[0053] like Fig.16 As shown, the antenna mechanism also includes a cable net 9, which includes a front cable net 9-1, an adjustment cable 9-2 and a support cable 9-3; the support cable 9-3 is arranged on the cable pull rod 5 to form an annular cable pull net, and the adjustment cable 9-2 is connected to the front cable net 9-1 and the support cable 9-3 respectively to control the deployment shape of the front cable net 9-1. The cable net 9-1 realizes a parabolic shape that meets actual needs by pulling the adjustment cable 9-2, and the support cable 9-3 is supported on the cable pull rod 5.

[0054] The steps for deploying the antenna mechanism are:

[0055] The motor drives the transmission screw 31, and the nut 32 on the screw 31 moves to drive the linkage rod 4; the linkage rod 4 drives the cable rod 5 to move, and the two four-bar mechanisms are driven by the auxiliary driving rod 55. The upper cable rod 51 and the lower cable rod 52 are connected to the terminal four-bar mechanism and driven by the auxiliary driving rod 55. At the same time, the main rib rod and the upper cable rod 51 and the lower cable rod 52 are deployed through the four-bar mechanism, and finally the synchronous deployment and retraction function of each radial rod is realized. During the deployment process of the antenna mechanism, all the multi-stage linkage module units A are deployed at the same time. The deployment process of the antenna mechanism is to unlock the mechanism, then the cable rods 5 of all the multi-stage linkage module units A are deployed, and finally the screw pair drive of all the module units is deployed.

[0056] The antenna mechanism of the above-mentioned implementation mode has the characteristics of modularization, etc., is suitable for networking of large-aperture parabolic antennas, and adapts to the development trend of satellite platforms.

[0057] The present invention has been disclosed as above with preferred implementation cases, but it is not used to limit the present invention. Any technician familiar with the profession can make slight changes or modifications to equivalent implementation cases with equivalent changes by using the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention, which still fall within the scope of the technical solution of the present invention.

Claims

1. A large-scale multi-module cable-rib tensioned antenna mechanism, comprising a multi-stage linkage module unit (A), wherein the multi-stage linkage module unit (A) comprises an upper bracket (1), a lower bracket (2), a lead screw pair, a linkage rod (4), a cable pull rod (5) and a support seat (6); the support seat (6) is mounted with the lower bracket (2), the two ends of a lead screw (31) of the lead screw pair are rotatably arranged on the upper bracket (1) and the lower bracket (2), a motor is mounted on the upper bracket (1), an output end of the motor is connected to the lead screw (31), and the lead screw (31) is connected to the upper bracket (1). Six groups of connecting rods (4) and six groups of cable tie rods (5) are arranged circumferentially on the nut (32) of the lever pair. The connecting rods (4) are respectively hinged to the nut (32) and the lower bracket (2). The connecting rods (4) include connecting rod one (41), connecting rod two (42) and connecting rod three (43); the two ends of connecting rod three (43) are respectively hinged to connecting rod two (42) and the cable tie rod (5), connecting rod two (42) is hinged to the nut (32), and the two ends of connecting rod one (41) are respectively hinged to the lower bracket (2) and connecting rod three (43); The cable-stayed rod (5) is hinged to the upper bracket (1) and the connecting rod (4) respectively; a connecting cable (7) is provided between the support seat (6) and the corresponding cable-stayed rod (5); a cable (7) is connected between adjacent cable-stayed rods (5); and a cable (7) is installed in each cable-stayed rod (5); each cable-stayed rod (5) comprises an upper cable rod (51), a lower cable rod (52), a plurality of double-rod assemblies (53) and a plurality of joints (54); two adjacent double-rod assemblies (53) are hinged in series through the joint (54); the first double-rod assembly (53) is hinged to the upper bracket (1) and the connecting rod (4) respectively; the double-rod assembly (53) and the joint (54) form a planar four-rod mechanism; the last double-rod assembly (53) and the last joint (54) are hinged to the upper cable rod (51) respectively; and the upper cable rod (51) and the lower cable rod (52) are hinged; Features: It also comprises a module unit interconnection mechanism, wherein the ends of the six groups of cable tie rods (5) after the multi-stage linkage module units are deployed are connected to form a regular hexagonal configuration, and the cable tie rods (5) between the S multi-stage linkage module units after deployment are connected and spliced ​​through the module unit interconnection mechanism (8) to form an N-layer topological configuration along the radial topology and along the circumferential array; in, The module unit interconnection mechanism (8) comprises a locking mechanism (8-1) and a joint hinge (8-2); the other ends of the two lower cable rods (52) of any two adjacent multi-stage linkage module units (A) are connected via the joint hinge (8-2), while the other ends of the two upper cable rods (51) are locked when the modular splicing tensioned antenna mechanism is unfolded and released when it is folded, so as to be suitable for networking of large-caliber parabolic antennas.

2. According to claim 1, the large-scale multi-module cable-rib tensioned antenna mechanism is characterized in that: The locking mechanism (8-1) comprises a locking block 1 (8-11), a locking block 2 (8-12), a locking hook (8-13) and a torsion spring; the locking block 2 (8-12) is rotatably connected to the locking hook (8-13); a torsion spring is arranged between the locking block 2 (8-12) and the locking hook (8-13) to abut against the two; after the antenna mechanism is fully unfolded, the locking block 1 (8-11) and the locking block 2 (8-12) are locked by the locking hook (8-13).

3. According to claim 1, the large-scale multi-module cable-rib tensioned antenna mechanism is characterized in that: Cables (7) are respectively connected between the support seat (6) and the double rod assembly (53), between the support seat (6) and the lower cable rod (52), and between the upper cable rod (51) and the lower cable rod (52); A cable (7) is provided between the end of any upper cable rod (51), the end of the upper cable rod (51) in the cable pull rod (5) adjacent thereto, the end of the lower cable rod (52) and the double rod assembly (53); A cable (7) is provided between the end of any lower cable rod (52), the end of the upper cable rod (51) in the cable pull rod (5) adjacent thereto, the end of the lower cable rod (52) and the double rod assembly (53); The last double-rod assembly (53) is provided with a cable (7) between the end of the upper cable rod (51) in the cable pull rod (5) adjacent to it, the end of the lower cable rod (52) and the last double-rod assembly (53).

4. The large-scale multi-module cable-rib tensioned antenna mechanism according to claim 3, characterized in that: The double-rod assembly (53) comprises auxiliary ribs and main ribs, which are respectively a first auxiliary rib (53-1), a first main rib (53-2), a second auxiliary rib (53-3), a second main rib (53-4), a third auxiliary rib (53-5), and a third main rib (53-6), and the joints are respectively a first joint (54-1), a second joint (54-2), and a third joint (54-3); The first auxiliary rib bar (53-1) and the first main rib bar (53-2) are arranged in parallel up and down, the second main rib bar (53-4) and the second auxiliary rib bar (53-3) are arranged in parallel up and down, and the third auxiliary rib bar (53-5) and the third main rib bar (53-6) are arranged in parallel up and down; The first auxiliary rib bar (53-1), the first main rib bar (53-2), the first joint (54-1) and the upper bracket (1) are correspondingly hinged to form a planar four-bar mechanism, and the first main rib bar (53-2) is hinged to the third connecting rod (43); The second auxiliary rib bar (53-3), the second main rib bar (53-4), the first joint (54-1) and the second joint (54-2) are correspondingly hinged to form a planar four-bar mechanism; an auxiliary driving rod (55) hinged to the first main rib bar (53-2) and the second auxiliary rib bar (53-3) is arranged between the two. The third auxiliary rib rod (53-5), the third main rib rod (53-6), the second joint (54-2) and the third joint (54-3) are correspondingly hinged to form a planar four-bar mechanism; the upper cable rod (51) is hinged to the third joint (54-3); an auxiliary driving rod (55) hinged to the third main rib rod (53-6) and the upper cable rod (51) is arranged between the two; and the upper cable rod (51) is hinged to the lower cable rod (52); Cables (7) are respectively connected between the support seat (6) and the third main rib rod (53-6), between the support seat (6) and the lower cable rod (52), and between the upper cable rod (51) and the lower cable rod (52); A cable (7) is provided between the end of an upper cable rod (51) in any cable rod tensioning assembly and the end of an upper cable rod (51) in an adjacent cable rod tensioning assembly, the end of a lower cable rod (52) and the third main rib rod (53-6); A cable (7) is provided between the end of the lower cable rod (52) in any cable rod tensioning assembly and the end of the upper cable rod (51) in the adjacent cable rod tensioning assembly, the end of the lower cable rod (52) and the third main rib rod (53-6); A cable (7) is provided between the third main rib (53-6) in any one of the cable-rod tensioning assemblies and the ends of the upper cable rod (51), the ends of the lower cable rod (52) and the third main rib (53-6) in the adjacent cable-rod tensioning assemblies.

5. The large-scale multi-module cable-rib tensioned antenna mechanism according to claim 4, characterized in that: The first joint (54-1) and the second joint (54-2) are both connecting parts with isosceles trapezoidal cross-sections, and the second joint (54-2) is arranged inverted.

6. The large-scale multi-module cable-rib tensioned antenna mechanism according to claim 5, characterized in that: The third joint (54-3) is a connecting member with a triangular cross section.

7. The large-scale multi-module cable-rib tensioned antenna mechanism according to any one of claims 1 to 6, characterized in that: The cables (7) are all Kevlar ropes or carbon fiber ropes.

8. The large-scale multi-module cable-rib tensioned antenna mechanism according to claim 2, characterized in that: The locking block 1 (8-11) and the locking block 2 (8-12) are respectively provided with limit rods (8-14); after the antenna mechanism is fully unfolded, the two limit rods (8-14) abut against each other.

9. The large-scale multi-module cable-rib tensioned antenna mechanism according to any one of claims 1 to 6, characterized in that: It also comprises a cable net (9), which comprises a front cable net (9-1), an adjusting cable (9-2) and a supporting cable (9-3); the supporting cable (9-3) is arranged on the cable pull rod (5) to form an annular cable pull net, and the adjusting cable (9-2) is respectively connected to the front cable net (9-1) and the supporting cable (9-3) to control the unfolding shape of the front cable net (9-1).

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