Double-scissor ultra-large-diameter load antenna based on orthographic projection division

Abstract

The invention discloses a double-shear-fork ultra-large-diameter load antenna based on orthographic projection division, and relates to the field of spaceflight, the antenna comprises eight double-shear-fork units which are located at different topological positions, are in central symmetry and are not completely the same in size, and the eight double-shear-fork units form a plurality of hexagonal prism type annular peripheral antenna modules with cable nets in the middles. And the finally spliced ultra-large-diameter load antenna folding and unfolding mechanism is a spherical surface mechanism. After the antenna is unfolded, the working surface of the cable net is a paraboloid, the vertex connecting surface of the folding and unfolding mechanism is a spherical surface, the antenna reflecting surface formed by the cable net tensioned on the antenna is a paraboloid, and the cable net is matched with the double-shear-fork unit to form a rigid-flexible coupled structure. The cable net can provide a working surface for the antenna and help tensioning, stability and rigidity of the antenna at the same time, the antenna has the advantages of being high in folding-unfolding ratio and large in caliber, the antenna is easier to store and install due to the cylinder-like structure after the antenna is stored, and convenience is provided for orbit injection of the antenna.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, in particular to a double-scissor-fork ultra-large-caliber payload antenna based on orthographic projection division. Background Art

[0002] As humans continue to move towards deep space and explore near the earth, aerospace technology, as a corresponding key technology, has become increasingly important in the development of science and technology. However, under the technical limitations of traditional chemical rockets, the volume and weight of spacecraft payloads are strictly restricted. These limitations have created a fierce conflict with the ever-increasing mission requirements, and have given rise to and promoted the development of space deployable mechanisms. In this process, the volume and accuracy of data transmission are becoming increasingly higher, and the breadth and depth of resource exploration are becoming increasingly larger. This has all driven the rapid improvement of the design requirements for space deployable antennas, and the demand for the development of ultra-large-aperture space payload antennas has become increasingly urgent. Breakthroughs are urgently needed in related technical fields. It can be said that in the coming years, space data transmission and detection and reconnaissance with ultra-large space deployable mechanisms as the technical background will become one of the focuses of competition among major countries.

[0003] However, traditional antennas do not have great advantages in high aspect ratio and large aperture. In addition, due to the limitations of volume and weight, traditional antennas are not easy to store and install, and it is not convenient to put the antenna into orbit. In this context, the ultra-large aperture payload antenna designed based on the double scissor-type unit with high reliability and good rigidity in engineering practice has important practical significance for the corresponding design, theoretical analysis and engineering application. To solve the above problems, a double scissor-type ultra-large aperture payload antenna based on orthographic projection partitioning is proposed. Summary of the invention

[0004] The object of the present invention is to provide a double scissor-type ultra-large aperture payload antenna based on orthographic projection partitioning to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double scissors-type ultra-large-caliber payload antenna based on orthographic projection division, comprising eight centrally symmetrical double scissors-type units located at different topological positions and with different sizes, which constitute a number of hexagonal prism-type annular peripheral antenna modules with cable nets in the middle, and the folding and unfolding mechanism of the ultra-large-caliber payload antenna finally assembled is a spherical mechanism, and its unfolded diameter is not less than 50m, and the eight types of double scissors-type units are double scissors-type unit type one, double scissors-type unit type two, double scissors-type unit type three, double scissors-type unit type four, double scissors-type unit type five, double scissors-type unit type six, double scissors-type unit type seven, and double scissors-type unit type eight, and the double scissors-type unit comprises a sliding rod, a central scissors-type mechanism, a push rod, a central sliding module, an edge sliding module, a sliding module limit, a push rod connection one, a push rod connection two, a central sliding rod connector and a driving spring;

[0006] The planes where the double scissor unit type 1, double scissor unit type 2 and double scissor unit type 3 are located always remain correspondingly parallel, and the sizes of the three are completely consistent. The central scissor mechanism in the double scissor unit includes a central scissor hinge, a long rod of the scissor mechanism, a short rod of the scissor mechanism and a scissor rod edge connector, wherein the long rod of the scissor mechanism is the same as the short rod of the scissor mechanism. The upper and lower planes of each sliding rod in any of the three types of double scissor units are coplanar, and there is no stepped height difference during the unfolding and folding process.

[0007] The sizes of the double scissors-fork unit type four, double scissors-fork unit type five, double scissors-fork unit type six, double scissors-fork unit type seven and double scissors-fork unit type eight are different from each other, the lengths of the long rod of the scissors-fork mechanism and the short rod of the scissors-fork mechanism included in the central scissors-fork mechanism in the double scissors-fork unit are different, the upper and lower planes of each sliding rod in any of the five types of double scissors-fork units are not coplanar, and there is a stepped height difference during the unfolding and folding process.

[0008] Preferably, the upper surface of the hexagonal prism-like annular peripheral antenna module is fitted by means of orthographic projection, and each module is projected from a projected plane hexagon with the same plane size and connected to a projection sphere through a projection direction, and the projection directions are parallel to each other and perpendicular to the projected plane hexagon. The corresponding projection space hexagon is obtained on the projection sphere by orthographic projection, thereby completing the division of the fitted sphere, that is, the upper surface of the folding mechanism. During the unfolding and folding process of the antenna, the angle of the plane where each double scissors unit is located is an integer multiple of 120° at each moment of unfolding and folding, and the angle between the planes where each double scissors unit is located remains unchanged, that is, there is no mutual rotation and torsion of the planes where the double scissors units are located during the unfolding process.

[0009] Preferably, a cable net is stretched between each of the hexagonal prism-like annular peripheral antenna modules to cooperate with the six double scissors-type units on its edge to form a rigid-flexible coupling structure therewith. The cable net can provide a working surface for the antenna while helping the antenna to be tensioned, stable and rigid. The cable net is composed of a front cable net, a tension array, a back cable net and a cable net compensation rod.

[0010] Preferably, the upper surface of the folding mechanism of the antenna in the expanded state is a spherical surface, and the vertices of the upper surface of the folding mechanism in the expanded state are all located on the same spherical surface. The antenna is a quasi-annular peripheral antenna with common edges connected in parallel, and the antenna reflecting surface formed by the cable net stretched thereon is a parabola. In the folded state, the upper surface is concave, the lower surface is convex, and the side surface is a three-dimensional structure with a cylindrical surface. The front cable nets attached to the upper surface of the folding mechanism through the cable net compensation rod constitute a parabolic working surface.

[0011] Preferably, in the double scissors-fork unit, an edge sliding module or a center sliding module is respectively arranged on two different parallel axes on the sliding rod, so as to realize the staggered placement of the front and rear center scissors-fork mechanisms on the same double scissors-fork unit. A double scissors-fork unit of the antenna includes six center scissors-fork mechanisms staggered front and back, which are connected in two groups of three by three. One end of the four center scissors-fork mechanisms at the edge is connected to the edge sliding module by a hinge to realize the compound movement of rotation and sliding, and the other end is connected to the push rod connection two or the center sliding rod connecting piece by a hinge to realize the rotation around the hinge axis. One end of the two center scissors-fork mechanisms located in the center is connected to the center sliding module by a hinge to realize the compound movement of sliding orthogonal to the motion axis and axial rotation, and the other end is connected to the center sliding rod connecting piece by a hinge to realize the rotation around the hinge axis. At the same time, the three center scissors-fork mechanisms located in the same plane realize the synchronous movement of the entire double scissors-fork unit through the common center sliding module.

[0012] Preferably, the central scissors-fork mechanism includes a central scissors-fork hinge, a long rod of the scissors-fork mechanism, a short rod of the scissors-fork mechanism and an edge connector of the scissors-fork rods. The long rod of the scissors-fork mechanism and the short rod of the scissors-fork mechanism are both hollow tubular rod structures. The central scissors-fork hinge can make the long rod of the scissors-fork mechanism and the short rod of the scissors-fork mechanism cooperate with each other to rotate coaxially. The edge connector of the scissors-fork rod has two non-intersecting and mutually perpendicular staggered axes to realize the rotation of the central scissors-fork mechanism and the composite motion of rotation and sliding.

[0013] Preferably, the central sliding module includes a central sliding module sliding block, a central sliding module connecting plate, a central sliding module double hinge and a central sliding module bottom plate, and the central sliding module sliding block can enable the central sliding module to maintain good coaxiality while sliding on the sliding rod, and the edge sliding module includes an edge sliding module sliding block, an edge sliding module pushing plate, an edge sliding module single hinge and an edge sliding module bottom plate, and the edge sliding module sliding block can enable the edge sliding module to maintain good coaxiality while sliding on the sliding rod.

[0014] Preferably, the center scissors hinge includes a center scissors hinge half hinge, a center scissors hinge shaft, a center scissors hinge bearing and a bearing retaining ring. The center scissors hinge shaft cooperates with the center scissors hinge half hinge and the center scissors hinge bearing to realize the rotation of the center scissors hinge.

[0015] Preferably, the push rod connection one includes a push rod connection piece one, a spring-driven placement piece one and a connecting pin one, and the push rod connection two includes a push rod connection piece two, a spring-driven placement piece two and a connecting pin two, and the push rod connection piece one connects the sliding rod and the push rod and makes the axes of the two parallel.

[0016] Preferably, the double scissor-type units that are close to each other are connected via a connecting assembly, which includes a sliding rod connecting rod, a sliding rod connecting pin and five groups of parallel sliding rod connecting parts. When the double scissor-type units that are close to each other are connected, the five groups of parallel sliding rod connecting parts are connected to corresponding hole positions on the sliding rod through the sliding rod connecting pins, and at the same time, a sliding rod connecting rod passes through the center holes of the five groups of sliding rod connecting parts to limit the lateral displacement of the corresponding sliding rod connecting parts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. In the present invention, the double scissor-type ultra-large-caliber payload antenna based on orthographic projection division includes eight double scissor-type unit folding and unfolding mechanisms with similar configurations and different sizes located in different topological positions, which constitute a number of hexagonal prism-type annular peripheral antenna modules with cable nets in the middle. The ultra-large-caliber payload antenna folding and unfolding mechanism finally assembled is a spherical mechanism, and its unfolded aperture is not less than 50m. After the antenna is unfolded, the working surface of the cable net is a parabola, and the vertex connection surface of the folding and unfolding mechanism is a spherical surface, and the vertices on the upper surface of the folding and unfolding mechanism in the unfolded state are all located at 90°. On the same spherical surface, the antenna is a quasi-annular peripheral antenna with a common edge connected in parallel, and the antenna reflector formed by the cable net stretched thereon is a parabola, and in the folded state, the upper surface is concave, the lower surface is convex, and the side surface is a three-dimensional structure of a cylinder. Therefore, in the process of unfolding and folding of the antenna of the present invention, the angle of the plane where each double scissor unit is located is an integer multiple of 120° at each moment of unfolding and folding, and the angle between the planes where each double scissor unit is located remains unchanged, that is, there is no mutual rotation and torsion between the planes where each double scissor unit is located during the unfolding process;

[0019] 2. In the present invention, a cable net is stretched between each hexagonal prism-like annular peripheral antenna module, which is matched with the six double scissor-type units on its edge to form a rigid-flexible coupling structure. The cable net can provide a working surface for the antenna while helping the antenna to be tightened, stable and rigid. Therefore, the antenna in the present invention has the advantages of high folding ratio and large aperture. Its cylindrical structure after storage also makes the antenna easier to store and install, which facilitates the antenna's entry into orbit. In the present invention, the ultra-large aperture load antenna designed based on the double scissor-type units with higher reliability and better rigidity in engineering practice has important practical significance for the corresponding design, theoretical analysis and engineering application. It also has a driving effect on the development of aerospace technology and has far-reaching significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the deployed state of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0021] Figure 2It is a schematic structural diagram of a folding state of a folding and unfolding mechanism of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0022] Figure 3 It is a schematic diagram of antenna orthographic projection division of a double scissor-type ultra-large-aperture payload antenna based on orthographic projection division according to the present invention;

[0023] Figure 4 Schematic diagram of eight types of double scissor units of a double scissor super-large aperture payload antenna based on orthographic projection division according to the present invention;

[0024] Figure 5 It is a schematic diagram of an antenna single module cable net of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection partitioning according to the present invention;

[0025] Figure 6 It is a schematic diagram of the deployment of a double scissor unit with equal length of scissor rods of a double scissor super-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0026] Figure 7 It is a schematic diagram of folding double scissor units with equal length of scissor rods of a double scissor super-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0027] Figure 8 It is a schematic diagram of a central scissor mechanism of a double-scissor super-large-aperture payload antenna based on orthographic projection division according to the present invention;

[0028] Fig. 9 It is a schematic diagram of the unfolded state of a double scissor unit of a double scissor super-large-caliber payload antenna with unequal lengths of scissor rods based on orthographic projection division according to the present invention;

[0029] Fig.10 It is a schematic diagram of a double scissor unit in a folded state with unequal lengths of scissor rods of a double scissor super-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0030] Fig.11 It is a schematic diagram of a connection method of adjacent connecting rods of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division through a connecting assembly according to the present invention;

[0031] Fig.12 It is a schematic diagram of a central sliding module of a double-scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to the present invention;

[0032] Fig.13 It is a schematic diagram of an edge sliding module of a double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to the present invention;

[0033] Fig.14 It is a schematic diagram of a central scissor hinge of a double-scissor super-large-aperture payload antenna based on orthographic projection partitioning of the present invention;

[0034] Fig.15 A schematic diagram of a push rod connection of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0035] Fig.16 It is a schematic diagram of the second connection of the push rod of the double scissor-type ultra-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0036] Fig.17 A schematic diagram of a sliding rod of a double-scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to the present invention;

[0037] Fig.18 It is a schematic diagram of a scissor rod edge connector of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division according to the present invention;

[0038] Fig.19 The present invention is a schematic diagram of a sliding rod connector of a double scissor-type ultra-large-caliber payload antenna based on orthographic projection division.

[0039] In the figure: 1. Projection direction; 2. Projected plane hexagon; 3. Projection space hexagon; 4. Projection sphere; 11. Double scissors unit type 1; 12. Double scissors unit type 2; 13. Double scissors unit type 3; 14. Double scissors unit type 4; 15. Double scissors unit type 5; 16. Double scissors unit type 6; 17. Double scissors unit type 7; 18. Double scissors unit type 8; 21. Front cable net; 22. Tension array; 2 3. Back cable net; 24. Cable net compensation rod; 101. Sliding rod; 102. Center scissor mechanism; 103. Push rod; 104. Center sliding module; 105. Edge sliding module; 106. Sliding module limit; 107. Push rod connection one; 108. Push rod connection two; 109. Center sliding rod connector; 110. Drive spring; 1021. Center scissor hinge; 1022. Scissor mechanism long rod; 1023. Scissor mechanism short rod; 1024. Scissor rod edge connector; 201. Sliding rod connector; 202. Sliding rod connecting rod; 203. Sliding rod connecting pin; 1041. Center sliding module sliding block; 1042. Center sliding module connecting plate; 1043. Center sliding module double hinge; 1044. Center sliding module bottom plate; 1051. Edge sliding module sliding block; 1052. Edge sliding module push plate; 1053. Edge sliding Module single hinge; 1054, edge sliding module bottom plate; 10211, center scissor hinge half hinge; 10212, center scissor hinge shaft; 10213, center scissor hinge bearing; 10214, bearing retaining ring; 1071, push rod connecting piece one; 1072, spring-driven placement piece one; 1073, connecting pin one; 1081, push rod connecting piece two; 1082, spring-driven placement piece two; 1083, connecting pin two. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1: Reference Figure 1 - Figure 4 As shown: A double scissor-type ultra-large-caliber payload antenna based on orthographic projection division includes eight centrally symmetrical double scissor-type units located in different topological positions and with different sizes, which constitute a number of hexagonal prism-like annular peripheral antenna modules with cable nets in the middle. The folding and unfolding mechanism of the ultra-large-caliber payload antenna finally assembled is a spherical mechanism, and its unfolded diameter is not less than 50m. The upper surface of the folding and unfolding mechanism of the antenna in the unfolded state is a sphere, and the vertices of the upper surface of the folding and unfolding mechanism in the unfolded state are all located on the same sphere. The antenna is a quasi-annular peripheral antenna with common edges connected in parallel, and the antenna reflector formed by the cable net stretched on it is a parabola. In the folded state, the upper surface is concave, the lower surface is convex, and the side surface is a three-dimensional structure of a cylinder;

[0042] In this embodiment, according to the different positions of each double scissor unit relative to the center, it can be divided into eight different types, and the eight types of double scissor units are double scissor unit type one 11, double scissor unit type two 12, double scissor unit type three 13, double scissor unit type four 14, double scissor unit type five 15, double scissor unit type six 16, double scissor unit type seven 17, double scissor unit type eight 18, wherein the configurations of the different types of scissor units are the same, and only the size is different, wherein the size of the double scissor unit type one 11, the double scissor unit type two 12, and the double scissor unit type three 13 are exactly the same, and the size of the central scissor mechanism 102 of the other five types of double scissor units is different;

[0043] In this embodiment, the upper surface of the hexagonal prism-like annular peripheral antenna module is fitted by means of orthographic projection. Each module is projected from a projected plane hexagon 2 of the same plane size and connected to a projection sphere 4 by means of a projection direction 1. The projection directions 1 are parallel to each other and perpendicular to the projected plane hexagon 2 (the projected plane hexagon 2 is 19 regular hexagons connected by mutually shared edges with a side length of 15m selected on the plane, and arranged in a topological manner from the center to the surroundings). The corresponding projection space hexagon 3 is obtained by orthographic projection on the projection sphere 4, thereby completing the division of the fitted sphere, that is, the upper surface of the folding and unfolding mechanism. During the process of unfolding and folding the antenna, the angle of the plane where each double scissor unit is located is an integer multiple of 120° at each moment of unfolding and folding, and the angle between the planes where each double scissor unit is located remains unchanged, that is, there is no mutual rotation and torsion of the planes where the double scissor units are located during the unfolding process.

[0044] Embodiment 2: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0045] In this embodiment, refer to Figure 5 A cable net is stretched between each hexagonal prism-like annular peripheral antenna module, which cooperates with six double scissor units on its edge to form a rigid-flexible coupling structure. The cable net can provide a working surface for the antenna while helping the antenna to be tightened, stable and rigid. The cable net is composed of a front cable net 21, a tension array 22, a back cable net 23 and a cable net compensation rod 24. The front cable nets 21 attached to the upper surface of the folding and unfolding mechanism through the cable net compensation rod 24 form a parabolic working surface;

[0046] In this embodiment, the front cable net 21 is responsible for reflecting electromagnetic waves. The front cable nets 21 of different modules are different parts of the parabola, which together constitute the required parabola reflection surface. The tension array 22 is responsible for tensioning the front cable net 21 and the back cable net 23, so that the cable net profile holding force of the entire antenna is higher and the structure of the antenna is more stable. The back cable net 23 provides corresponding support for the tensioning of the front cable net 21 of the antenna and the maintenance of the mechanical properties of the entire cable net structure. One end of the cable net compensation rod 24 is fixedly connected to the sliding rod, and the other end is fixedly connected to the front cable net 21 or the back cable net 23, which is used to compensate for the error between the upper surface of the antenna folding and unfolding mechanism and the working surface, that is, the error between the spherical surface and the parabola working surface.

[0047] Embodiment 3: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0048] In this embodiment, refer to Figure 6 - Figure 8 The double scissor unit includes a sliding rod 101, a central scissor mechanism 102, a push rod 103, a central sliding module 104, an edge sliding module 105, a sliding module limiter 106, a push rod connection 107, a push rod connection 2 108, a central sliding rod connector 109 and a driving spring 110;

[0049] In this embodiment, two parallel sliding axes on the sliding rod 101 that are kept at a certain distance are used to divide the central scissor mechanism 102 of the same double scissor unit into two parts that do not interfere with each other in forward and backward movements. The sliding blocks of the two parts of the scissor rods move in opposite directions and are arranged in opposite directions up and down. The three central scissor mechanisms 102 in the same part can be connected by the central sliding module 104 to achieve synchronous movement and deployment.

[0050] In this embodiment, the double scissor unit is provided with an edge sliding module 105 or a center sliding module 104 on two different parallel axes on the sliding rod 101, so as to realize the staggered placement of the front and rear center scissor mechanisms 102 on the same double scissor unit. A double scissor unit of the antenna includes six, two groups of three-by-three connected front and rear staggered center scissor mechanisms 102. One end of the four center scissor mechanisms 102 at the edge is connected to the edge sliding module 105 by a hinge to realize the composite motion of rotation and sliding, and the other end is connected to the push rod 104. The movable rod connection 108 or the central sliding rod connection piece 109 is connected by a hinge to realize rotation around the hinge axis. One end of the two central scissor-fork mechanisms 102 located in the center is connected to the central sliding module 104 by a hinge to realize the composite movement of sliding orthogonal to the movement axis and axial rotation. The other end is connected to the central sliding rod connection piece 109 by a hinge to realize rotation around the hinge axis. At the same time, the three central scissor-fork mechanisms 102 located in the same plane realize the synchronous movement of the entire double scissor-fork unit through the common central sliding module 104.

[0051] In this embodiment, two push rods 103 are fixed to the sides of the two sliding rods 101 at the outer edges, which are connected to the sliding rod 101 through a push rod connection 107 and a push rod connection 2 108. A driving spring 110 is arranged on each push rod 103 to drive the antenna to unfold. The driving springs 110 on the two push rods 103 connected to the same sliding rod 101 are arranged oppositely, while the driving springs 110 on the push rods 103 of the same set of triple central scissor-fork mechanisms 102 are arranged the same;

[0052] In this embodiment, the central scissor mechanism 102 includes a central scissor hinge 1021, a long rod 1022 of the scissor mechanism, a short rod 1023 of the scissor mechanism and a scissor rod edge connector 1024. The long rod 1022 of the scissor mechanism and the short rod 1023 of the scissor mechanism are both hollow tubular rod structures. The central scissor hinge 1021 can make the long rod 1022 of the scissor mechanism and the short rod 1023 of the scissor mechanism rotate around the same axis in cooperation with each other. The scissor rod edge connector 1024 has two non-intersecting mutually perpendicular staggered axes to realize the rotation of the central scissor mechanism 102 and the composite motion of rotation and sliding.

[0053] In this embodiment, the planes where the double scissors-fork unit type one 11, the double scissors-fork unit type two 12 and the double scissors-fork unit type three 13 are located always remain corresponding and parallel, and the sizes of the three are exactly the same, and the central scissors mechanism 102 in the double scissors-fork unit includes a central scissors-fork hinge 1021, a scissors-fork mechanism long rod 1022, a scissors mechanism short rod 1023 and a scissors rod edge connector 1024, wherein the scissors mechanism long rod 1022 and the scissors mechanism short rod 1023 have the same length, and the upper and lower planes of each sliding rod 101 in any of the three types of double scissors-fork units are coplanar, and there is no stepped height difference during the unfolding and folding process.

[0054] Embodiment 4: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0055] In this embodiment, refer to Figure 9-10 The sizes of double scissors unit type four 14, double scissors unit type five 15, double scissors unit type six 16, double scissors unit type seven 17 and double scissors unit type eight 18 are different. The lengths of the long scissors mechanism rod 1022 and the short scissors mechanism rod 1023 included in the central scissors mechanism 102 in the double scissors unit are different. The upper and lower planes of each sliding rod 101 in any of the five types of double scissors units are not coplanar, and there is a stepped height difference during the expansion and contraction process.

[0056] Embodiment 5: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0057] In this embodiment, refer to Fig.11Since there is no relative rotation and torsion between the double scissor units in the plane where they are located, they can be connected in a fixed manner. The double scissor units that are close to each other are connected by a connecting assembly, which includes a sliding rod connecting rod 202, a sliding rod connecting pin 203 and five groups of parallel sliding rod connecting members 201. When the double scissor units that are close to each other are connected, the five groups of parallel sliding rod connecting members 201 are connected to the corresponding holes on the sliding rod 101 through the sliding rod connecting pin 203, and at the same time, a sliding rod connecting rod 202 passes through the center holes of the five groups of sliding rod connecting members 201 to limit the lateral displacement of the corresponding sliding rod connecting members 201.

[0058] Embodiment 6: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0059] In this embodiment, refer to Fig.12 The central sliding module 104 includes a central sliding module sliding block 1041, a central sliding module connecting plate 1042, a central sliding module double hinge 1043 and a central sliding module bottom plate 1044. The central sliding module sliding block 1041 can make the central sliding module 104 slide on the sliding rod 101 while maintaining good coaxiality. The central sliding module connecting plate 1042 can connect the central sliding module double hinge 1043 with the central sliding module sliding block 1041 through its internal opening. There are two parallel axes on 1043 that can be connected to the central scissor mechanism 102 through hinges to realize the rotation and linkage of the central scissor mechanism 102. The axis orthogonal to the above two axes can realize the composite movement of rotation and sliding of the central scissor mechanism 102. The central sliding module bottom plate 1044 can contact with the sliding module limit 106 after the double scissor unit unfolding process is completed to realize the limit of the mechanism. The above components all contain notches, which can prevent the central sliding module 104 from interfering with the connecting plate thereon when moving along the sliding rod 101;

[0060] In this embodiment, refer to Fig.13The edge sliding module 105 includes an edge sliding module sliding block 1051, an edge sliding module pushing plate 1052, an edge sliding module single hinge 1053 and an edge sliding module bottom plate 1054. The edge sliding module sliding block 1051 can make the edge sliding module 105 slide on the sliding rod 101 while maintaining good coaxiality. The edge sliding module pushing plate 1052 can connect the edge sliding module single hinge 1053 with the edge sliding module sliding block 1051 through its internal opening. At the same time, the central opening can make the pushing rod 103 The edge sliding module single hinge 1053 has two mutually orthogonal axes to realize the composite movement of rotation and sliding of the central scissors-fork mechanism 102. The edge sliding module bottom plate 1054 can contact with the sliding module limit 106 after the double scissors-fork unit unfolding process is completed to realize the limitation of the mechanism. The above-mentioned components all contain notches, which can prevent the edge sliding module 105 from interfering with the connecting plate thereon when moving along the sliding rod 101.

[0061] Embodiment 7: It has the implementation contents of the above embodiments, wherein the specific implementation methods of the above embodiments can refer to the above description, and the embodiments here will not be repeated in detail; and in the embodiments of the present application, it is different from the above embodiments in that:

[0062] In this embodiment, refer to Fig.14 The central scissors-fork hinge 1021 includes a central scissors-fork hinge half-hinge 10211, a central scissors-fork hinge shaft 10212, a central scissors-fork hinge bearing 10213 and a bearing retaining ring 10214, wherein there are connecting holes at both ends of the central scissors-fork hinge half-hinge 10211 connected to the scissors-fork mechanism long rod 1022 and the scissors-fork mechanism short rod 1023, and there is a limiting structure on the side which can play a limiting role when the central scissors-fork mechanism 102 is folded so that the axes of the scissors-fork mechanism long rod 1022 and the scissors-fork mechanism short rod 1023 are parallel to each other, the central scissors-fork hinge shaft 10212 cooperates with the central scissors-fork hinge half-hinge 10211 and the central scissors-fork hinge bearing 10213 to realize the rotation of the central scissors-fork hinge 1021.

[0063] Embodiment 8: It has the implementation contents of the above embodiments, wherein the specific implementation methods of the above embodiments can refer to the above description, and the embodiments here will not be repeated in detail; and in the embodiments of the present application, it is different from the above embodiments in that:

[0064] In this embodiment, refer to Fig.15The push rod connection 107 includes a push rod connection piece 1071, a spring driven placement piece 1072 and a connection pin 1073. The push rod connection piece 1071 does not contain a rotation pair related structure and is not connected to the central scissor mechanism 102 through a hinge. It can connect the sliding rod 101 and the push rod 103 and make the axes of the two parallel. The spring driven placement piece 1072 is connected to the push rod connection piece 1071 and is used to be fixedly connected to one end of the driving spring 110. The connection pin 1073 can connect the three through the matching pin holes between the push rod connection piece 1071, the spring driven placement piece 1072 and the sliding rod 101;

[0065] In this embodiment, refer to Fig.16 The push rod connection 108 includes a push rod connection piece 1081, a spring-driven placement piece 1082 and a connecting pin 1083. The push rod connection piece 1071 connects the sliding rod 101 and the push rod 103 and makes the axes of the two parallel. The spring-driven placement piece 1082 is connected to the push rod connection piece 1081 for fixed connection with one end of the driving spring 110. The connecting pin 1083 can connect the three through the matching pin holes between the push rod connection piece 1081, the spring-driven placement piece 1082 and the sliding rod 101.

[0066] Embodiment 9: It has the implementation contents of the above embodiments, wherein the specific implementation methods of the above embodiments can refer to the above description, and the embodiments here will not be repeated in detail; and in the embodiments of the present application, it is different from the above embodiments in that:

[0067] In this embodiment, refer to Fig.17 The sliding rod 101 is connected by two hollow tubular rods with parallel axes through a connecting plate; each sliding rod 101 has five connecting plates, each of which has two pin holes, which are used to cooperate with the small holes on the sliding rod connecting member 201 and connect the two; there are four pin holes at both ends of the two rods, which can be matched with the pin holes on the push rod connecting member 107 or the push rod connecting member 208 to achieve connection;

[0068] In this embodiment, refer to Fig.18 The edge connector of the scissor rod has two mutually perpendicular axes, one end of which can be connected to the long rod 1022 of the scissor mechanism or the short rod 1023 of the scissor mechanism, and the other end is hinged to the relevant structure to realize the movement of the central scissor mechanism 102;

[0069] In this embodiment, refer to Fig.19 The center of the sliding rod connector 201 has a through hole for the push rod 103 to pass through, and its side has three protruding structures with weight-reducing hollows evenly distributed at an angle of 120°, and the pin holes on the protruding structures can cooperate with the pin holes on the sliding rod 101 to achieve connection.

[0070] The use method and working principle of this device: The double scissor-type ultra-large-caliber payload antenna based on orthographic projection division includes eight double scissor-type unit folding and unfolding mechanisms with similar configurations and different sizes located in different topological positions, which constitute several hexagonal prism-type annular peripheral antenna modules with cable nets in the middle. The folding and unfolding mechanism of the ultra-large-caliber payload antenna finally assembled is a spherical mechanism, and its unfolded diameter is not less than 50m;

[0071] After the antenna of the present invention is unfolded, the working surface of the cable net is a parabola, and the vertex connecting surface of the folding and unfolding mechanism is a spherical surface, and the vertices of the upper surface of the folding and unfolding mechanism in the unfolded state are all located on the same spherical surface, the antenna is a quasi-annular peripheral antenna with common edges connected in parallel, and the antenna reflection surface formed by the cable net stretched thereon is a parabola, and in the folded state, the upper surface is concave, the lower surface is convex, and the side surface is a three-dimensional structure of a cylinder; therefore, in the process of unfolding and folding of the antenna of the present invention, the angle of the plane where each double scissor unit is located is an integer multiple of 120° at each time of unfolding and folding, and the angle between the planes where each double scissor unit is located is unchanged, that is, there is no mutual rotation and torsion of the planes where each double scissor unit is located during the unfolding process;

[0072] A cable net is stretched between each hexagonal prism-like annular peripheral antenna module, which cooperates with the six double scissor-fork units on its edge to form a rigid-flexible coupling structure. The cable net can provide a working surface for the antenna while helping the antenna to be tensioned, stable and rigid. The cable net is composed of a front cable net 21, a tension array 22, a back cable net 23 and a cable net compensation rod 24. The front cable nets 21 attached to the upper surface of the folding and unfolding mechanism through the cable net compensation rod 24 form a parabolic working surface (the front cable net 21 is responsible for reflecting electromagnetic waves, and the front cable nets 21 of different modules are different parabolas). The same parts together constitute the required parabolic reflection surface. The tension array 22 is responsible for tensioning the front cable net 21 and the back cable net 23, so that the cable net profile retention force of the entire antenna is higher and the structure of the antenna is more stable. The back cable net 23 provides corresponding support for the tensioning of the front cable net 21 of the antenna and the mechanical properties of the entire cable net structure. One end of the cable net compensation rod 24 is fixedly connected to the sliding rod, and the other end is fixedly connected to the front cable net 21 or the back cable net 23, which is used to compensate for the error between the upper surface of the antenna folding and unfolding mechanism and the working surface, that is, the error between the spherical surface and the parabolic working surface);

[0073] The antenna in the present invention has the advantages of high folding-to-expansion ratio and large aperture, and its cylindrical structure after storage also makes the antenna easier to store and install, providing convenience for the antenna to enter orbit; in the present invention, the ultra-large aperture load antenna designed based on the double scissor-type unit with high reliability and good rigidity in engineering practice has important practical significance for the corresponding design, theoretical analysis, and engineering application, and also has a driving effect on the development of aerospace technology, which is of far-reaching significance.

[0074] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning, characterized in that: The invention comprises eight types of centrally symmetrical double scissor units located at different topological positions and with different sizes, which constitute a number of hexagonal prism-like annular peripheral antenna modules with cable nets in the middle. The folding and unfolding mechanism of the super-large-caliber payload antenna finally assembled is a spherical mechanism with an unfolded diameter of not less than 50m. The eight types of double scissor units are double scissor unit type one (11), double scissor unit type two (12), double scissor unit type three (13), double scissor unit type four (14), double scissor unit type Type five (15), double scissors fork unit type six (16), double scissors fork unit type seven (17), double scissors fork unit type eight (18), the double scissors fork unit comprising a sliding rod (101), a central scissors fork mechanism (102), a push rod (103), a central sliding module (104), an edge sliding module (105), a sliding module limiter (106), a push rod connection one (107), a push rod connection two (108), a central sliding rod connector (109) and a driving spring (110); The planes where the double scissor-fork unit type 1 (11), the double scissor-fork unit type 2 (12) and the double scissor-fork unit type 3 (13) are located always remain correspondingly parallel, and the sizes of the three are completely consistent. The central scissor-fork mechanism (102) in the double scissor-fork unit includes a central scissor-fork hinge (1021), a scissor-fork mechanism long rod (1022), a scissor-fork mechanism short rod (1023) and a scissor-fork rod edge connector (1024), wherein the scissor-fork mechanism long rod (1022) and the scissor-fork mechanism short rod (1023) are the same length, and the upper and lower planes of each sliding rod (101) in any of the three types of double scissor-fork units are coplanar, and there is no stepped height difference during the unfolding and folding process; The sizes of the double scissor-fork unit type four (14), double scissor-fork unit type five (15), double scissor-fork unit type six (16), double scissor-fork unit type seven (17) and double scissor-fork unit type eight (18) are different from each other. The lengths of the scissor-fork mechanism long rod (1022) and the scissor-fork mechanism short rod (1023) included in the central scissor-fork mechanism (102) in the double scissor-fork unit are different from each other. The upper and lower planes of each sliding rod (101) in any of the five types of double scissor-fork units are not coplanar, and there is a stepped height difference during the unfolding and folding process.

2. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The upper surface of the hexagonal prism-like annular peripheral antenna module is fitted by means of positive projection. Each module is positively projected onto a projection sphere (4) by means of a projection direction (1) from a projected plane hexagon (2) having the same plane size and being connected. The projection directions (1) are mutually parallel and perpendicular to the projected plane hexagon (2). The corresponding projection space hexagon (3) is obtained by positive projection on the projection sphere (4), thereby completing the division of the fitted sphere, i.e., the upper surface of the folding and unfolding mechanism. During the process of unfolding and folding of the antenna, the included angle of the plane where each double scissor-fork unit is located is an integer multiple of 120° at each moment of unfolding and folding, and the included angle between the planes where each double scissor-fork unit is located remains unchanged, i.e., during the unfolding process, there is no mutual rotation and twisting of the planes where each double scissor-fork unit is located.

3. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: A cable net is stretched between each of the hexagonal prism-like annular peripheral antenna modules and is matched with six double scissor-type units at its edge to form a rigid-flexible coupling structure. The cable net can provide a working surface for the antenna while helping to tighten, stabilize and stiffen the antenna. The cable net is composed of a front cable net (21), a tension array (22), a back cable net (23) and a cable net compensation rod (24).

4. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 3 is characterized in that: The upper surface of the folding mechanism of the antenna in the unfolded state is a spherical surface, and the vertices of the upper surface of the folding mechanism in the unfolded state are all located on the same spherical surface. The antenna is a quasi-annular peripheral antenna with common edges connected in parallel, and the antenna reflection surface formed by the cable net stretched on it is a parabola. In the folded state, the upper surface is concave, the lower surface is convex, and the side surface is a three-dimensional structure with a cylindrical surface. The front cable nets (21) attached to the upper surface of the folding mechanism through the cable net compensation rod (24) form a parabolic working surface.

5. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: In the double scissor unit, an edge sliding module (105) or a center sliding module (104) is respectively arranged on two different parallel axes on the sliding rod (101), so as to realize the staggered placement of the front and rear center scissor mechanisms (102) on the same double scissor unit. A double scissor unit of the antenna includes six, two groups of three-by-three connected front and rear staggered center scissor mechanisms (102). One end of the four center scissor mechanisms (102) at the edge is connected to the edge sliding module (105) by a hinge to realize the composite movement of rotation and sliding, and the other end is connected to the push rod (104). The rod connection 2 (108) or the central sliding rod connection piece (109) is connected by a hinge to realize rotation around the hinge axis. One end of the two central scissor-type mechanisms (102) located in the center is connected to the central sliding module (104) by a hinge to realize the composite movement of sliding orthogonal to the movement axis and axial rotation. The other end is connected to the central sliding rod connection piece (109) by a hinge to realize rotation around the hinge axis. At the same time, the three central scissor-type mechanisms (102) located in the same plane realize the synchronous movement of the entire double scissor-type unit through the common central sliding module (104).

6. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The central scissor mechanism (102) comprises a central scissor hinge (1021), a long rod (1022) of the scissor mechanism, a short rod (1023) of the scissor mechanism and a scissor rod edge connector (1024). The long rod (1022) of the scissor mechanism and the short rod (1023) of the scissor mechanism are both hollow tubular rod structures. The central scissor hinge (1021) can make the long rod (1022) of the scissor mechanism and the short rod (1023) of the scissor mechanism rotate around the same axis in cooperation with each other. The scissor rod edge connector (1024) has two non-intersecting mutually perpendicular staggered axes, so as to realize the rotation of the central scissor mechanism (102) and the composite motion of rotation and sliding.

7. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The central sliding module (104) comprises a central sliding module sliding block (1041), a central sliding module connecting plate (1042), a central sliding module double hinge (1043) and a central sliding module bottom plate (1044); the central sliding module sliding block (1041) can enable the central sliding module (104) to maintain good coaxiality while sliding on the sliding rod (101); the edge sliding module (105) comprises an edge sliding module sliding block (1051), an edge sliding module pushing plate (1052), an edge sliding module single hinge (1053) and an edge sliding module bottom plate (1054); the edge sliding module sliding block (1051) can enable the edge sliding module (105) to maintain good coaxiality while sliding on the sliding rod (101).

8. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The central scissor hinge (1021) comprises a central scissor hinge half hinge (10211), a central scissor hinge shaft (10212), a central scissor hinge bearing (10213) and a bearing retaining ring (10214); the central scissor hinge shaft (10212) cooperates with the central scissor hinge half hinge (10211) and the central scissor hinge bearing (10213) to realize the rotation of the central scissor hinge (1021).

9. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The push rod connection one (107) includes a push rod connection piece one (1071), a spring-driven placement piece one (1072) and a connecting pin one (1073); the push rod connection two (108) includes a push rod connection piece two (1081), a spring-driven placement piece two (1082) and a connecting pin two (1083); the push rod connection piece one (1071) connects the sliding rod (101) and the push rod (103) and makes the axes of the two parallel.

10. The double scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning according to claim 1 is characterized in that: The double scissor-type units that are close to each other are connected via a connecting assembly, wherein the connecting assembly comprises a sliding rod connecting rod (202), a sliding rod connecting pin (203) and five groups of parallel sliding rod connecting members (201). When the double scissor-type units that are close to each other are connected, the five groups of parallel sliding rod connecting members (201) are connected to corresponding hole positions on the sliding rod (101) via the sliding rod connecting pin (203), and at the same time, a sliding rod connecting rod (202) passes through the central holes of the five groups of sliding rod connecting members (201) to limit the lateral displacement of the corresponding sliding rod connecting members (201).

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