A semi-rigid cable net structure and a deployable umbrella-shaped antenna with repeatability

Abstract

The present application provides a semi-rigid cable net structure and a repeatable folding and unfolding umbrella-shaped antenna. The cable net structure is arranged outside the unfolding frame, and the cable net structure includes: a first support rib, a second support rib, a first support inner rib, a first support outer rib, a second support inner rib, a second support outer rib and a cable net rod group; the first support rib and the second support rib are alternately and evenly distributed around the outer circumference of the unfolding frame, and the second support outer rib is arranged at the bottom of the second support inner rib; a cable net rod group is arranged between the first support outer rib and the second support outer rib. The present invention connects the first support rib and the second support rib through the cable net rod group to form a new type of cable net structure, which can realize the arrangement of the cable net structure only through a single-layer design. The new type of cable net structure is more reliable when repeatedly folded and unfolded, and the silk winding caused by rapid local deformation is reduced to the greatest extent, and the surface error is further controlled.

Description

Technical Field

[0001] This application belongs to the technical field of antennas, and specifically relates to a semi-rigid cable net structure and a deployable umbrella-shaped antenna that can be repeatedly folded and unfolded. Background Art

[0002] One of the development trends of space antennas is to achieve their repeatable folding and unfolding. A typical umbrella-shaped antenna consists of a driving device, a transmission device, support ribs, and a main and secondary profile cable net. The cable net is attached to the support ribs. After the antenna reaches the predetermined orbit, the outer support ribs are released to form a complete reflector surface. By referring to relevant materials, it can be found that there are mainly the following two ways to deploy a high-precision umbrella-shaped antenna: 1 - Driving the deployment through a wire pulling method, which is applied to the "Ray 5" relay satellite developed by Russia. Patent CN113517544A also mentions a deployment structure of a wire-pulling umbrella-shaped antenna. Through a wire structure arranged symmetrically up and down, a more reliable deployment accuracy and a storage ratio are achieved; 2 - Driving the deployment through a lead screw, which is the driving method adopted by the antenna carried on the American TDRS satellite. In addition, domestic research institutes in related fields also mostly adopt this drive. Patent CN104617369A introduces a new rib deployment structure of a high-precision umbrella-shaped antenna, which has the characteristics of high repeatable deployment accuracy and small thermal deformation. The cable net of the umbrella-shaped antenna relies on the support ribs. Patent CN104241805A mentions a reflective cable net applied to the umbrella-shaped antenna reflector of a fixed-network combination, including a front tension net, a rear tension net, and a tension array. The front tension net and the rear tension net are symmetrical to each other, and have a high profile accuracy and profile retention ability.

[0003] Combined with Patent CN113517544A, for the umbrella-shaped antenna driven by the wire pulling method to deploy, the deployment process cannot be intervened, it is difficult to retract after deployment, it is impossible to achieve the rapid deformation of the local part of the umbrella-shaped antenna, and the cable net system composed entirely of flexible ropes and tension bands increases the probability of wire entanglement during the repeated folding and unfolding process; combined with Patent CN104617369A, for the space antenna driven by the lead screw to deploy, its profile accuracy depends on the number of support ribs arranged on the outer cable net. The more support ribs, the higher the profile accuracy will be. However, with the increase in the number of support ribs, the diameter of the central connection disk increases accordingly, further reducing the folding and unfolding ratio. On this antenna with low scalability, the reduction of the folding and unfolding ratio is an undeniable disadvantage; combined with Patent CN104241805A, this layout method of the mesh surface requires a symmetrical structure and a high degree of flexibility, which is not conducive to the realization of the rapid deformation of the local part of the space antenna. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a semi-rigid cable net structure and a repeatedly foldable and deployable umbrella-shaped antenna. By connecting the first support rib and the second support rib through a cable net rod group to form a new cable net structure, it can be realized that the layout of the cable net structure can be completed with only a single-layer design. The new cable net structure is more reliable when repeatedly folded and deployed, and the wire entanglement caused by rapid local deformation is reduced to the greatest extent. The surface error is further controlled. It can be repeatedly folded and deployed, with single drive, excellent deployment coordination and synchronization; a high-precision, semi-rigid antenna reflector surface can enable the reflector surface to reach the mainstream high-precision level.

[0005] To solve the above problems, this application provides a semi-rigid cable net structure. The cable net structure is arranged outside the deployment frame. The cable net structure includes: a first support rib, a second support rib, a first support inner rib, a first support outer rib, a second support inner rib, a second support outer rib and a cable net rod group;

[0006] The first support rib and the second support rib are alternately and evenly distributed around the outer circumference of the deployment frame. The first support rib includes a first support inner rib and a first support outer rib, and the first support outer rib is arranged at the bottom of the first support inner rib;

[0007] The second support rib includes a second support inner rib and a second support outer rib, and the second support outer rib is arranged at the bottom of the second support inner rib;

[0008] A cable net rod group is arranged between the first support outer rib and the second support outer rib.

[0009] Optionally, the cable net rod group includes: a sliding hinge, a fixed hinge and a cable net support rod;

[0010] A sliding space is opened in the middle of the first support outer rib, the sliding hinge is arranged in the sliding space, a fixed hinge is arranged at the bottom of the second support outer rib, and both ends of the cable net support rod are movably connected between the sliding hinge and the fixed hinge.

[0011] Optionally, the cable net support rod is connected to the sliding hinge and the fixed hinge through spherical pairs respectively.

[0012] Optionally, elastic hinges are arranged between the first support inner rib and the first support outer rib and between the second support inner rib and the second support outer rib.

[0013] On the other hand, the present application provides a repeatedly foldable umbrella-shaped antenna, which includes a driving structure, a moving slider, an unfolding upper plate, a first support rod, a second support rod, a self-locking structure and an antenna structure, and further includes the semi-rigid cable net structure as described above. The moving slider is arranged on the unfolding frame, and the driving structure is arranged on the unfolding frame and is used to drive the moving slider to move along the axis direction of the unfolding frame. The unfolding upper plate is arranged on the unfolding frame. First support rods are arranged between the moving slider and both the first support rib and the second support rib. Second support rods are arranged between the unfolding upper plate and both the first support rib and the second support rib. When the driving structure drives the moving slider to move along the axis of the unfolding frame, the first support rib and the second support rib can be driven to unfold and fold around the unfolding frame through the first support rod and the second support rod;

[0014] The self-locking structure is arranged on the side of the unfolding frame away from the driving structure, and the antenna structure is arranged on the self-locking structure.

[0015] Optionally, the driving structure includes: a lower support plate, a guide rod, a driving motor and a ball screw pair;

[0016] A plurality of guide rods are arranged between the lower support plate and the unfolding frame. The moving slider is slidably arranged on the guide rod. The driving motor is arranged on the lower support plate. The ball screw pair is arranged between the output end of the driving motor and the unfolding frame. When the driving motor drives the ball screw pair to rotate, the moving slider can be driven to move up and down along the guide rod.

[0017] Optionally, the first support rod includes a straight rod section and a scissors section. One end of the straight rod section is rotatably connected to the moving slider, and the open end of the scissors section is rotatably connected to the first support inner rib or the second support inner rib. The second support rod includes a first connecting rod and a second connecting rod. The first end of the first connecting rod is rotatably connected to the unfolding upper plate. The second end of the first connecting rod passes through the scissors section and is rotatably connected to the first end of the second connecting rod. The second end of the second connecting rod is rotatably connected to the first support inner rib or the second support inner rib. The first connecting rod is rotatably connected to the scissors section.

[0018] Optionally, the self-locking structure includes: a self-locking frame, a locking block, a self-locking motor and a self-locking rotating rod;

[0019] The self-locking frame is connected to the deployment frame. The locking blocks are symmetrically arranged at the bottom of the self-locking frame. A pin hole is formed in each locking block. The self-locking motor is arranged on the self-locking frame. The self-locking rotating rod is arranged at the output end of the self-locking driving motor. When the first support inner rib extends into the pin hole, the self-locking motor can drive the self-locking frame to fix the first support inner rib.

[0020] Optionally, a detection member is arranged at the top of the pin hole.

[0021] Optionally, the antenna structure includes: a mounting platform, an electric telescopic rod, and a sub-reflector;

[0022] The mounting platform is arranged on the self-locking frame. The mounting platform is located above the self-locking rotating rod. The electric telescopic rod is arranged on the mounting platform. The sub-reflector is arranged at the output end of the electric telescopic rod.

[0023] Beneficial effects

[0024] In the embodiments of the present invention, a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna are provided. The cable net rod group connects the first support rib and the second support rib to form a new cable net structure, which can realize the layout of the cable net structure with only a single-layer design. The new cable net structure is more reliable when repeatedly folded and deployed, and the wire winding caused by rapid local deformation is reduced to the greatest extent. The surface error is further controlled. It can be repeatedly folded and deployed, driven by a single drive, with excellent deployment coordination and synchronization; a high-precision, semi-rigid antenna reflector surface can make the reflector surface reach the mainstream high-precision level. Description of the drawings

[0025] Figure 1 It is a cable net structure diagram of a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna according to the present application;

[0026] Figure 2 It is a connection structure diagram of the first support rib and the second support rib of a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna according to the present application;

[0027] Figure 3 It is a connection structure diagram of the first support outer rib and the sliding hinge of a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna according to the present application;

[0028] Figure 4 It is a sliding hinge structure diagram of a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna according to the present application;

[0029] Figure 5 It is a connection structure diagram of the sliding second support rib and the fixed hinge member of a semi-rigid cable net structure and a re-foldable umbrella-shaped antenna according to the present application;

[0030] Figure 6 This is the unfolded structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0031] Figure 7 This is the sectional view structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0032] Figure 8 This is the drive structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0033] Figure 9 This is the self-locking structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0034] Figure 10 This is the antenna structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0035] Figure 11 This is the moving slider structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0036] Figure 12 This is the first support rod structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0037] Figure 13 This is the first connecting rod structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0038] Figure 14 This is the second connecting rod structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application;

[0039] Figure 15 This is the folded structure diagram of a semi-rigid cable net structure and a deployable umbrella-shaped antenna for this application.

[0040] The reference signs are shown as:

[0041] 1. Deployment frame; 2. Cable net structure; 21. First support rib; 22. Second support rib; 211. First inner support rib; 212. First outer support rib; 221. Second inner support rib; 222. Second outer support rib; 23. Cable net rod group; 231. Sliding hinge; 232. Fixed hinge; 233. Cable net support rod; 24. Elastic hinge; 3. Driving structure; 4. Moving slider; 5. Upper deployment plate; 6. First support rod; 7. Second support rod; 8. Self-locking structure; 9. Antenna structure; 31. Lower support plate; 32. Guide rod; 33. Driving motor; 34. Ball screw pair; 61. Straight rod section; 62. Scissor section; 71. First connecting rod; 72. Second connecting rod; 81. Self-locking frame; 82. Locking block; 83. Self-locking motor; 84. Self-locking rotating rod; 85. Detection piece; 91. Installation platform; 92. Electric telescopic rod; 93. Sub-reflector. Detailed implementation manners

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0044] In the present application, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0046] Combined with Figures 1-15 As shown, this embodiment provides a semi-rigid cable net structure. The cable net structure 2 is arranged outside the deployment frame 1. The cable net structure 2 includes: a first support rib 21, a second support rib 22, a first support inner rib 211, a first support outer rib 212, a second support inner rib 221, a second support outer rib 222, and a cable net rod group 23. The first support rib 21 and the second support rib 22 are alternately and evenly distributed around the outer circumference of the deployment frame 1. The first support rib 21 includes a first support inner rib 211 and a first support outer rib 212. The first support outer rib 212 is arranged at the bottom of the first support inner rib 211. The second support rib 22 includes a second support inner rib 221 and a second support outer rib 222. The second support outer rib is arranged at the bottom of the second support inner rib 221. A cable net rod group 23 is arranged between the first support outer rib 212 and the second support outer rib 222.

[0047] Specifically, the cable net structure 2 is installed outside the deployment frame 1. The first support rib 21 and the second support rib 22 in the cable net structure 2 are alternately and evenly distributed around the outer circumference of the deployment frame 1. The first support rib 21 includes a first support inner rib 211 and a first support outer rib 212 installed up and down. The second support rib 22 includes a second support inner rib 221 and a second support outer rib 222 installed up and down. The first support outer rib 212 and the second support outer rib 222 are connected by a cable net rod group 23. The first support rib 21 and the second support rib 22 are connected by the cable net rod group 23 to form a new cable net structure 2, which can realize the layout of the cable net structure 2 with only a single-layer design. The new cable net structure 2 is more reliable when repeatedly folded and unfolded, and can greatly reduce the wire winding caused by rapid local deformation to a greater extent. The surface error is also further controlled.

[0048] Specifically, the cross-sectional shapes of both the first support rib 21 and the second support rib 22 are parabolas, not straight rods. The purpose of the two-section design of the first support rib 21 and the second support rib 22 is to increase the folding and unfolding ratio of the antenna. Only with a larger folding and unfolding ratio can a larger antenna be placed in the limited launch cabin of a launch vehicle.

[0049] The cable net rod group 23 includes: a sliding hinge 231, a fixed hinge member 232, and a cable net support rod 233. A sliding space is provided in the middle of the first support outer rib 212. The sliding hinge 231 is arranged in the sliding space. A fixed hinge member 232 is arranged at the bottom of the second support outer rib 222. Both ends of the cable net support rod 233 are movably connected between the sliding hinge 231 and the fixed hinge member 232.

[0050] Specifically, a sliding space is provided at the bottom of the first support outer rib 212. A number of sliding hinges 231 are installed at intervals in the sliding space. The number of sliding hinges 231 can slide in the sliding space. A number of fixed hinge members 232 are fixedly installed at intervals at the bottom of the second support outer rib 222. Cable net support rods 233 are installed between the sliding hinges 231 and the fixed hinge members 232. Moreover, the cable net support rods 233 are movably connected to the sliding hinges 231 and the fixed hinge members 232. Through such a setting, during the unfolding and folding process of the cable net structure 2, the sliding hinges 231 can perform orderly translation in the sliding space. This not only facilitates the unfolding and folding of the cable net structure 2, but also prevents the cable net structure 2 from getting entangled, and the repeated folding and unfolding is more reliable and convenient. At the same time, during the unfolding process, the overall area of the cable net structure 2 does not continuously increase, but experiences a state of minimum area - maximum area - unfolding area (slightly smaller than the maximum area). Thus, the length of the cable net support rods 233 ensures that when the cable net structure 2 unfolds from the unfolded state to the maximum area state, the sliding hinges 231 can move outward to reach the farthest point, and then the subsequent process from the maximum area state to the folded state can be completed normally.

[0051] The cable net support rods 233 are connected to the sliding hinges 231 and the fixed hinge members 232 through spherical pairs.

[0052] Specifically, the two ends of the cable net support rods 233 are rotatably connected to the sliding hinges 231 and the fixed hinge members 232 through spherical pairs. Through such a setting, the flexibility between the cable net support rods and the sliding hinges 231 and the fixed hinge members 232 can be improved, facilitating the unfolding and folding of the cable net structure 2 and enhancing the convenience of unfolding and folding.

[0053] Elastic hinges 24 are provided between the first support inner rib 211 and the first support outer rib 212, and between the second support inner rib 221 and the second support outer rib 222.

[0054] Specifically, the elastic hinges 24 are installed between the first support inner rib 211 and the first support outer rib 212, and are also installed between the second support inner rib 221 and the second support outer rib 222, improving the connection stability between the first support inner rib 211 and the first support outer rib 212, and between the second support inner rib 221 and the second support outer rib 222.

[0055] On the other hand, this embodiment provides a repeatable folding and unfolding umbrella-shaped antenna, which includes a driving structure 3, a moving slider 4, an unfolding upper disk 5, a first support rod 6, a second support rod 7, a self-locking structure 8 and an antenna structure 9. It also includes the semi-rigid cable net structure as described above. The moving slider 4 is arranged on the unfolding frame 1, and the driving structure 3 is arranged on the unfolding frame 1 and is used to drive the moving slider 4 to move along the axis direction of the unfolding frame 1. The unfolding upper disk 5 is arranged on the unfolding frame 1. First support rods 6 are arranged between the moving slider 4 and the first support rib 21 and the second support rib 22 respectively. Second support rods 7 are arranged between the unfolding upper disk 5 and the first support rib 21 and the second support rib 22 respectively. When the driving structure 3 drives the moving slider 4 to move along the axis of the unfolding frame 1, the first support rib 21 and the second support rib 22 can be driven to unfold and fold around the unfolding frame 1 through the first support rod 6 and the second support rod 7. The self-locking structure 8 is arranged on one side of the unfolding frame 1 away from the driving structure 3, and the antenna structure 9 is arranged on the self-locking structure 8.

[0056] Specifically, on the other hand, this embodiment provides a repeatable folding and unfolding umbrella-shaped antenna. The moving slider 4 is installed on the unfolding frame 1. The moving slider 4 is circumferentially connected to the spaced first support rib 21 and second support rib 22 through the first support rod 6. The unfolding upper disk 5 installed on the unfolding frame 1 is circumferentially connected to the spaced first support rib 21 and second support rib 22 through the second support rod 7. The driving structure 3 is installed on the unfolding frame 1, and the driving structure 3 is used to drive the moving slider 4 to move up and down along the axis of the unfolding frame 1. During the process of the driving structure 3 driving the moving slider 4 to move up and down, the cable net structure 2 can be unfolded and folded around the unfolding frame 1 through the first support rod 6 and the second support rod 7. The self-locking structure 8 is installed at the bottom of the unfolding frame 1 and can lock the unfolded first inner support rib 211 to improve the stability of the unfolded cable net structure 2. When the cable net structure 2 needs to be folded, the self-locking structure 8 can release the first inner support rib 211 for convenient use. The antenna structure 9 is installed on the self-locking structure 8 and is used to receive signals.

[0057] The driving structure 3 includes: a lower support plate 31, a guide rod 32, a driving motor 33 and a ball screw pair 34;

[0058] A plurality of guide rods 32 are arranged between the lower support plate 31 and the unfolding frame 1. The moving slider 4 is slidably arranged on the guide rods 32. The driving motor 33 is arranged on the lower support plate 31. The ball screw pair 34 is arranged between the output end of the driving motor 33 and the unfolding frame 1. When the driving motor 33 drives the ball screw pair 34 to rotate, the moving slider 4 can be driven to move up and down along the guide rods 32.

[0059] Specifically, the driving structure 3 includes a lower support plate 31, guide rods 32, a driving motor 33 and a ball screw pair 34. A plurality of guide rods 32 are arranged between the lower support plate 31 and the unfolding frame 1. The guide rods 32 are circumferentially spaced along the axis of the unfolding frame 1. The driving motor 33 is installed on the lower support plate 31. The ball screw pair is installed between the output end of the driving motor 33 and the unfolding frame 1. The moving slider 4 is installed on the guide rods 32 and is connected to the ball screw pair. The driving motor 33 can drive the ball screw pair to rotate, and then drive the moving slider 4 to move up and down on the guide rods 32. Finally, the cable structure is driven to unfold and fold by the first support rod 6, providing power for the unfolding and folding of the cable structure.

[0060] The first support rod 6 includes a straight rod section 61 and a scissors section 62. One end of the straight rod section 61 is rotatably connected to the moving slider 4. The open end of the scissors section 62 is rotatably connected to the inner hole position of the first support inner rib 211 or the second support inner rib 221. The second support rod 7 includes a first connecting rod 71 and a second connecting rod 72. The first end of the first connecting rod 71 is rotatably connected to the upper unfolding disc 5. The second end of the first connecting rod 71 passes through the scissors section 62 and is rotatably connected to the first end of the second connecting rod 72. The second end of the second connecting rod 72 is rotatably connected to the outer hole position of the first support inner rib 211 or the second support inner rib 221. The first connecting rod 71 is rotatably connected to the scissors section 62.

[0061] The self-locking structure 8 includes a self-locking frame 81, a locking block 82, a self-locking motor 83 and a self-locking rotating rod 84;

[0062] The self-locking frame 81 is connected to the unfolding frame 1. The locking blocks 82 are symmetrically arranged at the bottom of the self-locking frame 81. A pin hole is formed in the locking block 82. The self-locking motor 83 is arranged on the self-locking frame 81. The self-locking rotating rod 84 is arranged on the output end of the self-locking driving motor 33. When the first support inner rib 211 extends into the pin hole, the self-locking motor 83 can drive the self-locking frame 81 to fix the first support inner rib 211.

[0063] A detection member 85 is arranged on the top of the pin hole.

[0064] Specifically, the self-locking frame 81 is installed at the bottom of the deployment frame 1. On the bottom of one side of the self-locking frame 81 away from the deployment frame 1, two locking blocks 82 are symmetrically installed. A pin hole with an open bottom is provided on the locking block 82, which can accommodate the first support inner rib 211 to enter the pin hole from the bottom of the locking block 82. The lengths of two of the several first support inner ribs 211 are longer than those of the other first support inner ribs 211. After the cable net structure 2 is deployed, the two first support inner ribs 211 with lengths longer than those of the others will slide into the pin hole from the bottom of the locking block 82. At this time, the detector installed on the top of the pin hole can detect the first support inner rib 211 and then transmit it to the controller. The controller controls the self-locking motor 83 to drive the self-locking rotating rod 84 to rotate, and the pin hole closes, realizing the fixation of the first support inner rib 211 entering the pin hole. The cooperation of the two locking blocks 82 realizes the locking after the cable net structure 2 is deployed.

[0065] Specifically, the self-locking motor is a stepper motor, and the control is more convenient.

[0066] Specifically, the detection part 85 is an infrared distance measuring sensor, which is used to detect the entry of the first support inner rib 211 into the pin hole.

[0067] The antenna structure 9 includes: a mounting platform 91, an electric telescopic rod 92 and a sub-reflector 93;

[0068] The mounting platform 91 is arranged on the self-locking frame 81, the mounting platform 91 is located above the self-locking rotating rod 84, the electric telescopic rod 92 is arranged on the mounting platform 91, and the sub-reflector 93 is arranged on the output end of the electric telescopic rod 92.

[0069] Specifically, the antenna structure 9 includes a mounting platform 91, an electric telescopic rod 92 and a sub-reflector 93. The mounting platform 91 is installed on the self-locking frame 81 and is located above the self-locking rotating rod 84. Therefore, the mounting platform 91 will not interfere with the use of the self-locking structure 8. The rotation range of the self-locking rotating rod 84 should be 0-90°, and 60-90° is the best, which can not only ensure the reliability of the operation of the self-made motor 83, but also does not affect the mutual connection of the entire deployment frame 1 and the self-locking frame 81. The electric telescopic rod 92 is installed on the mounting platform 91, and the sub-reflector 93 is installed on the telescopic end of the electric telescopic rod 92. After the device reaches the predetermined orbit, the cable net structure 2 is deployed under the drive of the drive structure 3. After the cable net structure 2 is deployed, the sub-reflector 93 moves to the designated position under the drive of the electric telescopic rod to receive signals.

[0070] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0071] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and variations can be made without departing from the technical principle of the present application, and these improvements and variations should also be regarded as within the protection scope of the present application.

Claims

1. A semi-rigid cable net structure, wherein the cable net structure (2) is arranged outside the deployment frame (1), characterized in that, The cable net structure (2) includes: a first support rib (21), a second support rib (22), a first inner support rib (211), a first outer support rib (212), a second inner support rib (221), a second outer support rib (222), and a cable net rod group (23); The first support rib (21) and the second support rib (22) are alternately and evenly distributed around the outer circumference of the deployment frame (1). The first support rib (21) includes a first inner support rib (211) and a first outer support rib (212), and the first outer support rib (212) is arranged at the bottom of the first inner support rib (211); The second support rib (22) includes a second inner support rib (221) and a second outer support rib (222), and the second outer support rib (222) is arranged at the bottom of the second inner support rib (221); A cable net rod group (23) is arranged between the first outer support rib (212) and the second outer support rib (222); The cable net rod group (23) includes: a sliding hinge (231), a fixed hinge member (232), and a cable net support rod (233); A sliding space is formed in the middle of the first outer support rib (212), the sliding hinge (231) is arranged in the sliding space, a fixed hinge member (232) is arranged at the bottom of the second outer support rib (222), and both ends of the cable net support rod (233) are movably connected between the sliding hinge (231) and the fixed hinge member (232); Elastic hinges (24) are arranged between the first inner support rib (211) and the first outer support rib (212), and between the second inner support rib (221) and the second outer support rib (222); 2. The semi-rigid cable net structure according to claim 1, characterized in that, The cable net support rod (233) is connected to the sliding hinge (231) and the fixed hinge member (232) through spherical pairs; 3. A retractable umbrella-shaped antenna, characterized in that, It includes a driving structure (3), a moving slider (4), a deployment upper disc (5), a first support rod (6), a second support rod (7), a self-locking structure (8), and an antenna structure (9). It further includes the semi-rigid cable net structure according to any one of claims 1 to 2. The moving slider (4) is arranged on the deployment frame (1), the driving structure (3) is arranged on the deployment frame (1) and is used to drive the moving slider (4) to move along the axis direction of the deployment frame (1). The deployment upper disc (5) is arranged on the deployment frame (1). First support rods (6) are arranged between the moving slider (4) and the first support rib (21) and the second support rib (22). Second support rods (7) are arranged between the deployment upper disc (5) and the first support rib (21) and the second support rib (22). When the driving structure (3) drives the moving slider (4) to move along the axis of the deployment frame (1), the first support rib (21) and the second support rib (22) can be driven to deploy and fold around the deployment frame (1) through the first support rods (6) and the second support rods (7); The self-locking structure (8) is arranged on the side of the unfolding frame (1) away from the driving structure (3), and the antenna structure (9) is arranged on the self-locking structure (8).

4. The retractable umbrella-shaped antenna according to claim 3, characterized in that The driving structure (3) includes: a lower support plate (31), a guide rod (32), a driving motor (33), and a ball screw pair (34); A plurality of guide rods (32) are arranged between the lower support plate (31) and the unfolding frame (1). The moving slider (4) is slidably arranged on the guide rod (32). The driving motor (33) is arranged on the lower support plate (31), and the ball screw pair (34) is arranged between the output end of the driving motor (33) and the unfolding frame (1). When the driving motor (33) drives the ball screw pair (34) to rotate, it can drive the moving slider (4) to move up and down along the guide rod (32).

5. The retractable umbrella-shaped antenna according to claim 4, characterized in that, The first support rod (6) includes a straight rod section (61) and a scissor section (62). One end of the straight rod section (61) is rotatably connected to the moving slider (4), and the open end of the scissor section (62) is rotatably connected to the first support inner rib (211) or the second support inner rib (221); The second support rod (7) includes a first connecting rod (71) and a second connecting rod (72). The first end of the first connecting rod (71) is rotatably connected to the upper unfolding disk (5). The second end of the first connecting rod (71) passes through the scissor section (62) and is rotatably connected to the first end of the second connecting rod (72). The second end of the second connecting rod (72) is rotatably connected to the first support inner rib (211) or the second support inner rib (221), and the first connecting rod (71) is rotatably connected to the scissor section (62).

6. The retractable umbrella-shaped antenna according to claim 5, characterized in that, The self-locking structure (8) includes: a self-locking frame (81), a locking block (82), a self-locking motor (83), and a self-locking rotating rod (84); The self-locking frame (81) is connected to the unfolding frame (1). The locking blocks (82) are symmetrically arranged at the bottom of the self-locking frame (81). A pin hole is formed in the locking block (82). The self-locking motor (83) is arranged on the self-locking frame (81). The self-locking rotating rod (84) is arranged on the output end of the self-locking driving motor (33). When the first support inner rib (211) extends into the pin hole, the self-locking motor (83) can drive the self-locking frame (81) to fix the first support inner rib (211).

7. The retractable umbrella-shaped antenna according to claim 6, wherein, A detection member (85) is arranged on the top of the pin hole.

8. The retractable umbrella-shaped antenna according to claim 7, wherein The antenna structure (9) includes: a mounting platform (91), an electric telescopic rod (92), and a sub-reflector (93); The mounting platform (91) is arranged on the self-locking frame (81). The mounting platform (91) is located above the self-locking rotating rod (84). The electric telescopic rod (92) is arranged on the mounting platform (91), and the sub-reflector (93) is arranged on the output end of the electric telescopic rod (92).

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