A double-shear fork super-large caliber load antenna based on orthographic projection division

Abstract

The application discloses a double-shear fork super-large-caliber load antenna based on orthographic projection division and relates to the field of spaceflight. The antenna comprises eight center-symmetrical double-shear units located at different topological positions and having different sizes, which constitute a plurality of six-prism ring periphery type antenna modules with intermediate tensioned cable nets, and a finally combined super-large-caliber load antenna folding and unfolding mechanism is a spherical 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 tensioned cable net of the antenna is a paraboloid, the cable net cooperates with the double-shear unit to form a rigid-flexible coupling structure, the cable net can provide the working surface of the antenna and help the tensioning, stabilization and stiffness of the antenna, the antenna has the advantages of high folding and unfolding ratio and large caliber, the cylindrical structure after storage of the antenna makes the antenna more easily stored and installed, and the antenna is more convenient for orbit insertion.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of aerospace technology, in particular to a double-shear fork super-large caliber load antenna based on orthogonal projection division. BACKGROUND

[0002] With the continuous exploration of human beings into deep space and near earth, aerospace technology as a key technology plays an increasingly important role 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 limited, which has caused a sharp contradiction with the increasing mission requirements, and thus promoted the development of space folding mechanisms. In this process, the volume and accuracy requirements of data transmission are increasingly high, and the breadth and depth of resource exploration are increasingly large, which has driven the design requirements of space deployable antennas to rapidly improve. Therefore, the development of super-large caliber space load antennas is increasingly urgent, and breakthroughs are needed in related technical fields. In the next few years, space data transmission and detection reconnaissance based on super-large space deployable mechanisms will become one of the focuses of competition among major countries.

[0003] Traditional antennas do not have great advantages in high folding ratio and large caliber, and due to the limitations of volume and weight, they are not easy to store and install, which is not convenient for the on-orbit use of antennas. Under this background, a super-large caliber load antenna based on a double-shear fork unit with high reliability and good stiffness in engineering practice has important practical significance for corresponding design, theoretical analysis and engineering application. In view of the above problems, a double-shear fork super-large caliber load antenna based on orthogonal projection division is proposed. SUMMARY

[0004] The present application relates to the field of aerospace technology, in particular to a double-shear fork super-large caliber load antenna based on orthogonal projection division.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a double-shear fork super-large caliber load antenna based on orthogonal projection division, comprising eight types of center-symmetric double-shear units with different sizes located at different topological positions, which constitute a plurality of intermediate tensioned net six-prism ring periphery type antenna modules. The final super-large caliber load antenna folding mechanism is a spherical mechanism with an unfolded caliber of not less than 50m. The eight types of double-shear units are double-shear unit type one, double-shear unit type two, double-shear unit type three, double-shear unit type four, double-shear unit type five, double-shear unit type six, double-shear unit type seven and double-shear unit type eight. The double-shear unit comprises a sliding rod, a center shear mechanism, a push rod, a center sliding module, an edge sliding module, a sliding module limit, a push rod connection one, a push rod connection two, a center sliding rod connector and a driving spring.

[0006] The planes where the double-shearing fork unit type one, double-shearing fork unit type two and double-shearing fork unit type three are located always keep corresponding parallel, and the sizes of the three are completely consistent, the center shearing fork mechanism in the double-shearing fork unit includes center shearing fork hinge, shearing fork mechanism long rod, shearing fork mechanism short rod and shearing fork rod edge connector, the length of the shearing fork mechanism long rod and the shearing fork mechanism short rod is the same, the upper and lower planes of each sliding rod in any double-shearing fork unit of the three types are coplanar, and there is no stepped height difference in the process of unfolding and folding.

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

[0008] Preferably, the upper surface of the six-prism ring-shaped peripheral antenna module is fitted by orthographic projection, each module is projected by orthographic projection from the projected planar hexagon with the same size and connected to the projection sphere in the positive direction of projection, the projection directions are parallel to each other and perpendicular to the projected planar hexagon, the corresponding projection space hexagon is obtained on the projection sphere by orthographic projection, thereby completing the division of the fitted sphere, i.e. the upper surface of the folding and unfolding mechanism, the included angle between the planes where each double-shearing fork unit is located is an integer multiple of 120° at each time of unfolding and folding, and the included angle between the planes where each double-shearing fork unit is located is unchanged, i.e. there is no mutual rotation and torsion of the planes where each double-shearing fork unit is located in the process of unfolding.

[0009] Preferably, a cable net cooperating with the six edge double-shearing fork units is stretched between each six-prism ring-shaped peripheral antenna module to form a rigid-flexible coupled structure, the cable net can provide a working surface for the antenna and help the tension, stability and stiffness of the antenna, the cable net is composed of front cable net, tension array, back cable net and cable net compensation rod.

[0010] Preferably, the upper surface of the folding and unfolding mechanism in the unfolded state of the antenna is a sphere, and the vertices of the upper surface of the folding and unfolding mechanism in the unfolded state are located on the same sphere, the antenna is a ring-shaped peripheral antenna connected in parallel with common edges, the antenna reflecting surface formed by the tensioned cable net is a parabolic surface, the folded state is a three-dimensional structure with a concave upper surface, a convex lower surface and a cylindrical side surface, and the front cable net attached to the upper surface of the folding and unfolding mechanism forms a parabolic working surface through the cable net compensation rod.

[0011] Preferably, the double scissor unit is achieved by arranging one edge sliding module or center sliding module on two different parallel axes on the sliding rod, so as to stagger the front and rear center scissor mechanisms on the same double scissor unit. The double scissor unit includes six, i.e. two groups of three front and rear staggered center scissor mechanisms connected in series. The four center scissor mechanisms at the edge are connected to the edge sliding module through a hinge at one end, realizing the combined motion of rotation and sliding, and connected to the push rod at the other end or connected to the center sliding rod connector through a hinge, realizing rotation around the hinge shaft. The two center scissor mechanisms in the center are connected to the center sliding module through a hinge at one end, realizing the combined motion of sliding and axial rotation with the axis being orthogonal, and connected to the center sliding rod connector through a hinge at the other end, realizing rotation around the hinge shaft. The three center scissor mechanisms located in the same plane realize the synchronous motion of the entire double scissor unit through the shared center sliding module.

[0012] Preferably, the center scissor mechanism includes a center scissor hinge, a scissor mechanism long rod, a scissor mechanism short rod and a scissor rod edge connector. The scissor mechanism long rod and the scissor mechanism short rod are both hollow tubular rod structures. The center scissor hinge allows the scissor mechanism long rod and the scissor mechanism short rod to rotate coaxially in cooperation. The scissor rod edge connector has two non-intersecting and mutually perpendicular staggered axes, so as to realize the rotation of the center scissor mechanism and the combined motion of rotation and sliding.

[0013] Preferably, the center sliding module includes a center sliding module sliding block, a center sliding module connecting plate, a center sliding module double hinge and a center sliding module bottom plate. The center sliding module sliding block can make the center sliding module slide on the sliding rod while maintaining good coaxiality. The edge sliding module includes an edge sliding module sliding block, an edge sliding module push plate, an edge sliding module single hinge and an edge sliding module bottom plate. The edge sliding module sliding block can make the edge sliding module slide on the sliding rod while maintaining good coaxiality.

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

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

[0016] Preferably, the double-shear fork units close to each other are connected through a connecting assembly, the connecting assembly comprises a sliding rod connecting rod, a sliding rod connecting pin and five groups of parallel sliding rod connecting pieces, when the double-shear fork units close to each other are connected, the five groups of parallel sliding rod connecting pieces are connected with the corresponding hole positions on the sliding rods through the sliding rod connecting pin, and at the same time, a sliding rod connecting rod passes through the center holes of the five groups of sliding rod connecting pieces to limit the transverse displacement of the corresponding sliding rod connecting pieces.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1、In the present application, the double-shear fork ultra-large caliber load antenna based on orthogonal projection division comprises eight double-shear unit folding and unfolding mechanisms with similar configurations and different sizes located at different topological positions, which form a plurality of six-prism ring-shaped peripheral antenna modules with intermediate tensioned netting, and the final combined ultra-large caliber load antenna folding and unfolding mechanism is a spherical mechanism, the unfolded caliber is not less than 50m, the working surface of the netting after the antenna is unfolded is a parabolic surface, the vertex connecting surface of the folding and unfolding mechanism is a spherical surface, and the vertexes of the upper surfaces of the folding and unfolding mechanism in the unfolded state are located on the same spherical surface, the antenna is a ring-shaped peripheral antenna in parallel connection with shared edges, and the antenna reflecting surface formed by the tensioned netting thereon is a parabolic surface, the folded state is a three-dimensional structure with a concave upper surface, a convex lower surface and a cylindrical side surface, therefore, in the unfolding and folding process of the antenna, the included angle of the planes of the double-shear fork units is an integer multiple of 120° at each time of unfolding and folding, the included angle between the planes of the double-shear fork units is unchanged, that is, there is no mutual rotation and torsion of the planes of the double-shear fork units in the unfolding process.

[0019] 2、In the present application, the six-prism ring-shaped peripheral antenna modules are all tensioned with netting cooperating with the six double-shear fork units at the edges thereof to form a rigid-flexible coupled structure, the netting can provide the working surface for the antenna and help the tensioning, stability and stiffness of the antenna, therefore, the antenna in the present application has the advantages of high folding and unfolding ratio and large caliber, and the cylindrical structure after folding makes the antenna easier to be stored and installed, which provides convenience for the in-orbit installation of the antenna, the double-shear fork ultra-large caliber load antenna designed based on the double-shear fork units with high reliability and good stiffness in engineering practice has important practical significance for the corresponding design, theoretical analysis and engineering application, and plays a promoting role in the development of space technology, and has far-reaching significance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Figure 1 is a structure diagram of the unfolded state of the double-shear fork ultra-large caliber load antenna based on orthogonal projection division according to the present application;

[0021] Figure 2A folding state structure schematic diagram of a double-shear fork super-large caliber load antenna folding and unfolding mechanism based on orthogonal projection division of the application;

[0022] Figure 3 An antenna orthogonal projection division schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0023] Figure 4 Eight types of double-shear fork units of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0024] Figure 5 An antenna single module cable net schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0025] Figure 6 An equal-length double-shear fork unit unfolding schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0026] Figure 7 An equal-length double-shear fork unit folding schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0027] Figure 8 A center shear mechanism schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0028] Figure 9 An unequal-length double-shear fork unit unfolding state schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0029] Figure 10 An unequal-length double-shear fork unit folding state schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0030] Figure 11 A connection mode schematic diagram of adjacent connecting rods through a connecting assembly of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0031] Figure 12 A center sliding module schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0032] Figure 13 An edge sliding module schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0033] Figure 14 A center shear hinge schematic diagram of a double-shear fork super-large caliber load antenna based on orthogonal projection division of the application;

[0034] Figure 15 A schematic diagram of a push rod connection of a double-shear super-large-caliber load antenna based on orthogonal projection division of the application;

[0035] Figure 16 A schematic diagram of a push rod connection two of a double-shear super-large-caliber load antenna based on orthogonal projection division of the application;

[0036] Figure 17 A schematic diagram of a sliding rod of a double-shear super-large-caliber load antenna based on orthogonal projection division of the application;

[0037] Figure 18 A schematic diagram of a shear rod edge connector of a double-shear super-large-caliber load antenna based on orthogonal projection division of the application;

[0038] Figure 19 A schematic diagram of a sliding rod connector of a double-shear super-large-caliber load antenna based on orthogonal projection division of the application.

[0039] In the figure: 1, projection direction; 2, projected plane hexagon; 3, projection space hexagon; 4, projection sphere; 11, double-shear unit type one; 12, double-shear unit type two; 13, double-shear unit type three; 14, double-shear unit type four; 15, double-shear unit type five; 16, double-shear unit type six; 17, double-shear unit type seven; 18, double-shear unit type eight; 21, front cable net; 22, tension array; 23, back cable net; 24, cable net compensation rod; 101, sliding rod; 102, center shear 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, driving spring; 1021, center shear hinge; 1022, shear mechanism long rod; 1023, shear mechanism short rod; 1024, shear 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 shear hinge half hinge; 10212, center shear hinge shaft; 10213, center shear hinge bearing; 10214, bearing retainer; 1071, push rod connector one; 1072, spring driving placement one; 1073, connecting pin one; 1081, push rod connector two; 1082, spring driving placement two; 1083, connecting pin two. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0041] Example 1: Reference Figure 1 - Figure 4 The figure shows a double-scissor-type ultra-large-aperture payload antenna based on orthographic projection division, comprising eight centrally symmetrical double-scissor-type units of varying sizes located in different topological positions, which form a number of hexagonal prism-like annular peripheral antenna modules with a cable net stretched in the middle. The resulting ultra-large-aperture payload antenna has a spherical folding and unfolding mechanism with a deployed aperture of no less than 50m. In the deployed state, the upper surface of the folding and unfolding mechanism is a sphere, and all vertices of the upper surface of the folding and unfolding mechanism in the deployed state are located on the same sphere. The antenna is a quasi-annular peripheral antenna with common edges connected in parallel. The cable net stretched on it forms a parabolic reflector surface. In the folded state, the antenna has a concave upper surface, a convex lower surface, and a cylindrical side surface.

[0042] In this embodiment, the double scissors units can be divided into eight different types according to their different positions relative to the center, and the eight types of double scissors units are double scissors unit type one 11, double scissors unit type two 12, double scissors unit type three 13, 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. The different types of scissors units have the same configuration and only differ in size. The sizes of the double scissors unit type one 11, the double scissors unit type two 12, and the double scissors unit type three 13 are exactly the same, and the sizes of the central scissors mechanisms 102 of the other five types of double scissors units are different.

[0043] In the embodiment, the upper surface of the hexagonal prism type annular peripheral antenna module is fitted by orthographic projection, each module is orthographically projected to the projection sphere 4 by the projection direction 1 from the projected planar hexagon 2, the projection direction 1 is parallel to each other and perpendicular to the projected planar hexagon 2 (the projected planar hexagon 2 is 19 regular hexagons connected by the mutually shared edges with the length of 15 m in the plane, arranged in the way of topology from the center to the periphery), the corresponding projection space hexagon 3 is obtained on the projection sphere 4 by orthographic projection, thereby completing the division of the fitted sphere, i.e. the upper surface of the folding and unfolding mechanism. In the process of unfolding and folding of the antenna, the included angle of the plane of each double scissor unit is an integer multiple of 120° at each time of unfolding and folding, and the included angle between the planes of each double scissor unit is unchanged, i.e. there is no mutual rotation and torsion of the planes of each double scissor unit in the process of unfolding.

[0044] Embodiment 2: which has the implementation content of the above embodiments, wherein for the specific implementation of the above embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the present application, the difference from the above embodiments is that:

[0045] In the embodiment, referring to Figure 5 Each hexagonal prism type annular peripheral antenna module is provided with a cable net cooperating with the six double scissor units at the edge thereof to form a rigid-flexible coupled structure, the cable net can provide a working surface for the antenna and help the tension, stability and stiffness of 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, and the front cable net 21 attached to the upper surface of the folding and unfolding mechanism forms a parabolic working surface through the cable net compensation rod 24;

[0046] In the 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 parabolic surface, and they together form the required parabolic reflecting 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 of the entire antenna has higher retention force, 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 with the sliding rod, and the other end is fixedly connected with the front cable net 21 or the back cable net 23, which is used to compensate the error between the upper surface of the antenna folding and unfolding mechanism and the working surface, i.e. the error between the spherical surface and the parabolic working surface.

[0047] Embodiment 3: which has the implementation content of the above embodiments, wherein for the specific implementation of the above embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the present application, the difference from the above embodiments is that:

[0048] In the embodiment, referring to Figure 6 -Figure 8 The double scissor unit comprises a sliding rod 101, a central scissor mechanism 102, a pushing rod 103, a central sliding module 104, an edge sliding module 105, a sliding module limit 106, a pushing rod connection one 107, a pushing rod connection two 108, a central sliding rod connector 109 and a driving spring 110;

[0049] In the embodiment, the central scissor mechanism 102 of the same double scissor unit is divided into two parts which do not interfere with each other in forward and backward movement by two parallel sliding axes on the sliding rod 101, the sliding block movement directions of the two parts of scissor rods are opposite, and the upper and lower arrangements are also opposite, the three central scissor mechanisms 102 in the same part can realize synchronous movement and expansion through the connection of the central sliding module 104;

[0050] In the embodiment, one edge sliding module 105 or central sliding module 104 is arranged on each of the two different parallel axes on the sliding rod 101 in the double scissor unit, so as to realize the staggered placement of the front and rear central scissor mechanisms 102 on the same double scissor unit, one double scissor unit of the antenna includes six, i.e. two groups of three front and rear staggered central scissor mechanisms 102 connected in series, one end of the four central scissor mechanisms 102 at the edge is connected with the edge sliding module 105 through a hinge to realize the combined movement of rotation and sliding, the other end is connected with the pushing rod connection two 108 or the central sliding rod connector 109 through a hinge to realize rotation around the hinge shaft, one end of the two central scissor mechanisms 102 at the center is connected with the central sliding module 104 through a hinge to realize the combined movement of sliding and axial rotation with the axis being orthogonal, the other end is connected with the central sliding rod connector 109 through a hinge to realize rotation around the hinge shaft, and the three central scissor mechanisms 102 located in the same plane realize synchronous movement of the whole double scissor unit through the shared central sliding module 104;

[0051] In the embodiment, two pushing rods 103 are fixed on the side surface of each of the two sliding rods 101 at the outer edge, which are connected with the sliding rod 101 through the pushing rod connection one 107 and the pushing rod connection two 108, and the driving spring 110 is arranged on each pushing rod 103 to drive the expansion of the antenna, the driving springs 110 on the two pushing rods 103 connected with the same sliding rod 101 are arranged in opposite directions, and the driving springs 110 on the pushing rods 103 of the central scissor mechanisms 102 in the same group of three are arranged in the same way;

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

[0053] In the embodiment, the planes where the double scissor unit type one 11, the double scissor unit type two 12 and the double scissor unit type three 13 are located always keep corresponding parallel, and the sizes of the three are completely consistent, the center scissor mechanism 102 in the double scissor unit comprises a center scissor hinge 1021, a scissor mechanism long rod 1022, a scissor mechanism short rod 1023 and a scissor rod edge connector 1024, wherein the lengths of the scissor mechanism long rod 1022 and the scissor mechanism short rod 1023 are the same, and the upper and lower planes of each sliding rod 101 in any double scissor unit in the three types are coplanar, and there is no stepped height difference in the unfolding and folding process.

[0054] Embodiment 4: It has the implementation content of the above-mentioned embodiments, wherein for the specific implementation of the above-mentioned embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the application, the difference from the above-mentioned embodiments is that:

[0055] In the embodiment, referring to Figures 9-10 , the sizes of the double scissor unit type four 14, the double scissor unit type five 15, the double scissor unit type six 16, the double scissor unit type seven 17 and the double scissor unit type eight 18 are different, the lengths of the scissor mechanism long rod 1022 and the scissor mechanism short rod 1023 contained in the center scissor mechanism 102 in the double scissor unit are different, and the upper and lower planes of each sliding rod 101 in any double scissor unit in the five types are not coplanar, and there is a stepped height difference in the unfolding and folding process.

[0056] Embodiment 5: It has the implementation content of the above-mentioned embodiments, wherein for the specific implementation of the above-mentioned embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the application, the difference from the above-mentioned embodiments is that:

[0057] In the embodiment, referring to Figure 11, the double shear fork units are connected in a fixed manner because no relative rotation and torsion are generated in the planes in which the double shear fork units are located, the double shear fork units close to each other are connected through a connecting assembly, the connecting assembly includes a sliding rod connecting rod 202, a sliding rod connecting pin 203, and five groups of parallel sliding rod connecting pieces 201, when the double shear fork units close to each other are connected, the five groups of parallel sliding rod connecting pieces 201 are connected with corresponding hole positions on the sliding rod 101 through the sliding rod connecting pin 203, and at the same time, one sliding rod connecting rod 202 passes through the center holes of the five groups of sliding rod connecting pieces 201 to limit the transverse displacement of the corresponding sliding rod connecting pieces 201.

[0058] Embodiment 6: It has the implementation content of the above-mentioned embodiments, wherein for the specific implementation of the above-mentioned embodiments, reference can be made to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the present application, the difference from the above-mentioned embodiments is that:

[0059] In the embodiment, reference is made to Figure 12 The center sliding module 104 includes a center sliding module sliding block 1041, a center sliding module connecting plate 1042, a center sliding module double hinge 1043, and a center sliding module bottom plate 1044. The center sliding module sliding block 1041 can make the center sliding module 104 slide on the sliding rod 101 while maintaining good coaxiality. The center sliding module connecting plate 1042 is connected with the center sliding module double hinge 1043 through the internal hole of the center sliding module connecting plate 1042. The center sliding module double hinge 1043 has two parallel shafts connected with the center shear mechanism 102 through a hinge, realizing the rotation and linkage of the center shear mechanism 102. The shaft orthogonal to the above two shafts realizes the combined motion of rotation and sliding of the center shear mechanism 102. The center sliding module bottom plate 1044 is in contact with the sliding module limiting piece 106 after the double shear fork unit expansion process is completed, realizing the limiting of the mechanism. The above components all have notches, which can avoid interference between the center sliding module 104 and the connecting plate on the sliding rod 101 during movement along the sliding rod 101.

[0060] In the embodiment, reference is made to Figure 13The edge sliding module 105 includes an edge sliding module sliding block 1051, an edge sliding module push 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 push plate 1052 is connected with the edge sliding module single hinge 1053 through the internal hole of the edge sliding module push plate 1052, and the push rod 103 passes through the central hole of the edge sliding module push plate 1052, so as to realize the sliding movement of the edge sliding module 105 along the sliding rod 101 and the push rod 103. The edge sliding module single hinge 1053 has two mutually orthogonal shafts to realize the combined movement of the rotation and sliding of the center scissor mechanism 102. The edge sliding module bottom plate 1054 is in contact with the sliding module limiting part 106 after the double scissor unit is unfolded, so as to realize the limiting of the mechanism. The above components all have notches, so that the edge sliding module 105 can avoid interference with the connecting plate on the sliding rod 101 during the movement along the sliding rod 101.

[0061] Embodiment 7: It has the implementation content of the above-mentioned embodiments, wherein for the specific implementation of the above-mentioned embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the application, the difference from the above-mentioned embodiments is that:

[0062] In this embodiment, refer to Figure 14 The center scissor hinge 1021 includes a center scissor hinge half hinge 10211, a center scissor hinge shaft 10212, a center scissor hinge bearing 10213, and a bearing retainer 10214. The center scissor hinge half hinge 10211 has connecting holes at both ends connected with the scissor mechanism long rod 1022 and the scissor mechanism short rod 1023, and a limiting structure on the side surface that can limit the center scissor mechanism 102 when it is folded to make the axis of the scissor mechanism long rod 1022 and the scissor mechanism short rod 1023 parallel to each other. The center scissor hinge shaft 10212 cooperates with the center scissor hinge half hinge 10211 and the center scissor hinge bearing 10213 to realize the rotation of the center scissor hinge 1021.

[0063] Embodiment 8: It has the implementation content of the above-mentioned embodiments, wherein for the specific implementation of the above-mentioned embodiments, please refer to the above description, and the embodiment here is not repeated in detail; and in the embodiment of the application, the difference from the above-mentioned embodiments is that:

[0064] In this embodiment, refer to Figure 15The push rod connecting piece one 1071 connects the sliding rod 101 and the push rod 103 and makes the axis of the two parallel, the spring driving placement piece one 1072 is connected with the push rod connecting piece one 1071 and is used for being fixedly connected with one end of the driving spring 110, and the connecting pin one 1073 is connected with the push rod connecting piece one 1071, the spring driving placement piece one 1072 and the sliding rod 101 through the pin holes matched therebetween.

[0065] In the embodiment, referring to Figure 16 The push rod connecting piece two 1081 connects the sliding rod 101 and the push rod 103 and makes the axis of the two parallel, the spring driving placement piece two 1082 is connected with the push rod connecting piece two 1081 and is used for being fixedly connected with one end of the driving spring 110, and the connecting pin two 1083 is connected with the push rod connecting piece two 1081, the spring driving placement piece two 1082 and the sliding rod 101 through the pin holes matched therebetween.

[0066] Embodiment 9: which has the implementation content of the above-mentioned embodiments, wherein, for the specific implementation of the above-mentioned embodiments, refer to the above description, the embodiment here is not repeated in detail; and in the embodiment of the application, the difference from the above-mentioned embodiments is that:

[0067] In the embodiment, referring to Figure 17 The sliding rod 101 is connected by two axis-parallel hollow tubular rods through the connecting plates; each sliding rod 101 has five connecting plates, each of which has two pin holes, which are used for cooperating with the small holes on the sliding rod connecting piece 201 and connecting the two; the two rod pieces have four pin holes at the two ends, which are used for cooperating with the pin holes on the push rod connecting one 107 or the push rod connecting two 108 to realize connection.

[0068] In the embodiment, referring to Figure 18 The scissor rod edge connecting piece has two mutually perpendicular axes, one end of which is connected with the long scissor mechanism rod 1022 or the short scissor mechanism rod 1023, and the other end is hingedly connected with the related structure to realize the movement of the center scissor mechanism 102.

[0069] In the embodiment, referring to Figure 19 The sliding rod connecting piece 201 has a through hole in the center for the push rod 103 to pass through, and the side has three protruding structures with weight-reducing hollow structures distributed at an angle of 120°, and the pin holes on the protruding structures are used for cooperating with the pin holes on the sliding rod 101 to realize connection.

[0070] The device's usage and working principle: The dual-scissor-type ultra-large-aperture payload antenna, based on orthographic projection division, includes eight dual-scissor-type unit folding and deployment mechanisms with similar configurations but different sizes located in different topological positions. These mechanisms form several hexagonal prism-like annular peripheral antenna modules with cable nets in the middle. The resulting ultra-large-aperture payload antenna folding and deployment mechanism is a spherical mechanism with a deployed aperture of no less than 50m.

[0071] When the antenna of the present invention is deployed, the working surface of the cable net is a parabola, while the vertex connecting surface of the folding and unfolding mechanism is a sphere. In the deployed state, the vertices of the upper surface of the folding and unfolding mechanism all lie on the same sphere. The antenna is a quasi-annular peripheral antenna formed by connecting the common edges in parallel. The cable net stretched thereon forms the antenna reflector surface of a parabola. In the retracted state, the antenna has a three-dimensional structure with a concave upper surface, a convex lower surface, and cylindrical side surfaces. Therefore, during the deployment and retraction process of the antenna of the present invention, the angle between the planes containing the double scissor units is an integer multiple of 120° at each moment of deployment and retraction, and the angle between the planes containing the double scissor units remains unchanged. That is, during deployment, there is no relative rotation or twisting between the planes containing the double scissor units.

[0072] Each hexagonal prism-like annular peripheral antenna module is equipped with a cable net that cooperates with the 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 to tighten, stabilize and strengthen 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. 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 parabolic surfaces). The same parts together constitute the required parabolic reflective 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 of the entire antenna is more retained and the antenna structure 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. It 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 of the present invention has the advantages of a high aspect ratio and a large aperture. Its cylindrical structure after being stored 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 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. It also has a driving effect on the development of aerospace technology and has far-reaching significance.

[0074] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A double-scissor-type ultra-large-aperture payload antenna based on orthographic projection partitioning, characterized by: The invention comprises eight types of centrally symmetrical double scissor units with different sizes located in different topological positions, which constitute a number of hexagonal prism-like annular peripheral antenna modules with a cable net in the middle. The folding and unfolding mechanism of the super-large-aperture payload antenna finally assembled is a spherical mechanism with an unfolding aperture of not less than 50m. The eight types of double scissor units are double scissor unit type 1 (11), double scissor unit type 2 (12), double scissor unit type 3 (13), double scissor unit type 4 (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 unit type 1 (11), double scissor unit type 2 (12) and double scissor unit type 3 (13) are located always remain correspondingly parallel, and the sizes of the three are completely consistent. The central scissor mechanism (102) in the double scissor unit includes a central scissor hinge (1021), a scissor mechanism long rod (1022), a scissor mechanism short rod (1023) and a scissor rod edge connector (1024), wherein the scissor mechanism long rod (1022) and the scissor mechanism short rod (1023) are the same length. The upper and lower planes of each sliding rod (101) in any of the three types of double scissor units are all coplanar, and there is no stepped height difference during the expansion and contraction process. The sizes of the double scissor unit type four (14), double scissor unit type five (15), double scissor unit type six (16), double scissor unit type seven (17) and double scissor unit type eight (18) are different from each other. The lengths of the scissor mechanism long rod (1022) and the scissor mechanism short rod (1023) included in the central scissor mechanism (102) in the double scissor unit are different. The upper and lower planes of each sliding rod (101) in any of the five types of double scissor units are not coplanar, and there is a stepped height difference during the expansion and contraction 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 formed by positively projecting a projected plane hexagon (2) with the same plane size and connected to each other onto a projection sphere (4) through a projection direction (1). 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 mechanism. During the process of unfolding and folding the antenna, the included 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 included 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 each double scissor unit is located during the unfolding process.

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, which is matched with 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 to tighten, stabilize and strengthen 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: In the unfolded state, the upper surface of the folding mechanism of the antenna is a sphere, and the vertices of the upper surface of the folding 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. 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 parabola 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), thereby realizing 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) through a hinge to realize the composite motion of rotation and sliding, and the other end is connected to the push The rod connection 2 (108) or the central sliding rod connection (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 a composite motion of sliding orthogonal to the motion axis and axial rotation. The other end is connected to the central sliding rod connection (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 motion of the entire double scissor-fork unit through the shared 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 mechanism hinge (1021), a long rod (1022) of the scissor mechanism, a short rod (1023) of the scissor mechanism and a scissor mechanism edge connector (1024). The long rod (1022) and the short rod (1023) of the scissor mechanism are both hollow tubular rod structures. The central scissor mechanism hinge (1021) enables the long rod (1022) and the short rod (1023) of the scissor mechanism to rotate around the same axis in cooperation with each other. The scissor mechanism edge connector (1024) has two non-intersecting, mutually perpendicular, staggered axes, so as to realize the rotation and the composite motion of rotation and sliding of the central scissor mechanism (102).

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) enables 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) enables 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, characterized in that: The push rod connection 1 (107) includes a push rod connection member 1 (1071), a spring-driven placement member 1 (1072) and a connecting pin 1 (1073); the push rod connection 2 (108) includes a push rod connection member 2 (1081), a spring-driven placement member 2 (1082) and a connecting pin 2 (1083); the push rod connection member 1 (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, characterized in that: The double scissor-fork units that are close to each other are connected through 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-fork units that are close to each other are connected, the five groups of parallel sliding rod connecting members (201) are connected to 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).

Images