Full revolute pair framework type parabolic cylinder antenna device based on equal-size faceplates

Abstract

The invention provides a full-revolute-pair framework type parabolic cylinder antenna device based on equal-size face plates, and relates to the field of space deployable antenna manufacturing, the full-revolute-pair framework type parabolic cylinder antenna device comprises an upper-layer curved surface deployable mechanism and a lower-layer curved surface deployable mechanism which are oppositely arranged, the upper-layer curved surface deployable mechanism is rotatably connected with the lower-layer curved surface deployable mechanism through a supporting rod, and the lower-layer curved surface deployable mechanism is rotatably connected with the lower-layer curved surface deployable mechanism; therefore, a single-degree-of-freedom full-revolute pair deployable mechanism is formed. The sizes and the number of the equal-size flower discs, the folding rods and the supporting rods are all determined by projection molded surfaces, upper-layer curved surfaces and lower-layer curved surfaces, and the projection molded surfaces are obtained by splicing and expanding a plurality of same projection basic units in the bottom edge direction of the projection basic units and the vertical line direction of the bottom edge of the projection basic units. And fitting to obtain a parabolic cylinder antenna device with any aperture and size. The invention has the advantages of single degree of freedom, high degree of modularization, high degree of generalization of components, convenience in connection among components and the like, is easy to process and assemble, and is suitable for rapid mass production.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing space deployable antennas, and particularly to a fully rotating pair framed parabolic cylinder antenna device based on equal-sized flower plates. Background Art

[0002] Existing on-orbit cases of parabolic cylinder antennas are all small-aperture antennas, including solid surface antennas and thin film antennas. Framed parabolic cylinder antennas have the advantages of high precision, high deployment ratio, and easy implementation of large apertures, and their demand has been increasing year by year. In recent years, the demand for domestic satellites has increased significantly, putting forward requirements for the performance of framed parabolic cylinder antennas, such as the reliability of the deployment process, the convenience of design and processing, the realization of ultra-large or even extremely large apertures, and the surface accuracy in orbit.

[0003] In order to make up for the research gap of parabolic cylinder antennas at the present stage, domestic research institutions have successively carried out research on framed parabolic cylinder antennas in recent years. For example, Patent CN202111500464.5 proposes a parabolic cylinder antenna based on a triangular prism foldable unit. This antenna uses a triangular prism foldable unit to realize the deployment of the antenna structure, and the deployment size of the antenna can be expanded by splicing triangular prism foldable units. However, this prism unit has more degrees of freedom during the deployment process, and the degrees of freedom further increase as the number of networking units increases, which is not conducive to the realization of large apertures. In addition, this design cannot fully fit the parabolic cylinder surface, and its stiffness is inferior to that of pyramid units. Patent CN202211222567.4 proposes an inclined pentahedron unit array single-degree-of-freedom parabolic cylinder folding and unfolding antenna mechanism. Through the combination and size adjustment of multiple units, the design of a framed parabolic cylinder antenna with arbitrary curvature is realized. However, the connecting pairs include multiple universal joints and various flower plates, with a complex configuration and affecting the deployment accuracy. Patent CN202310805707.9 provides a tetrahedron framed deployable parabolic cylinder mesh antenna. The antenna is composed of multiple tetrahedron units arranged in an array. An unfolding linkage mechanism is provided at the vertices of the tetrahedron foldable units, which has high stiffness after unfolding. However, the linkage mechanism contains sliding pairs, and as the number of combined units increases, the number of sliding pairs increases. A large number of sliding pairs may cause jamming during the deployment process, reducing the deployment reliability.

[0004] In summary, all of the above have the situation that it is difficult to balance the degrees of freedom and the complexity of components. In order to meet the complete folding of the mechanism along the aperture plane, a large number of complex kinematic pairs, such as spherical pairs and universal joints, are used in the above mechanisms, reducing the deployment accuracy of the mechanism. In addition, such pyramid unit mechanisms will generate a large number of rod members and flower plate types when fitting the parabolic cylinder surface, thus increasing the complexity of components. Therefore, the present invention proposes a fully rotating pair framed parabolic cylinder antenna device based on equal-sized flower plates. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the present invention provides a fully rotating pair framework type parabolic cylinder antenna device based on equal-size flower plates. By controlling the parameters of the projection surface, the upper surface and the lower surface, the position relationship, quantity, size and other parameters of the equal-size flower plates and folding rods in the upper surface deployable mechanism and the lower surface deployable mechanism are obtained respectively. The equal-size flower plates and folding rods in the upper surface deployable mechanism and the lower surface deployable mechanism are the same, with few types of parts and a single type of equal-size flower plate. Therefore, it has good interchangeability and versatility. The connections between the equal-size flower plates, folding rods and struts are all rotational connections. Therefore, the obtained motion has unique certainty, and the obtained antenna device has the characteristics of single degree of freedom, single type of motion pair and high deployment and retraction ratio, is easy to achieve large aperture and high precision, and can be applied to satellite antennas of various apertures.

[0006] The present invention provides a fully rotatable joint framed parabolic cylinder antenna device based on equal-sized flower plates, which comprises an upper curved surface deployable mechanism and a lower curved surface deployable mechanism. The upper curved surface deployable mechanism and the lower curved surface deployable mechanism are placed opposite to each other and are rotationally connected by a strut. The upper curved surface deployable mechanism and the lower curved surface deployable mechanism respectively comprise equal-sized flower plates and folding rods. Two adjacent equal-sized flower plates are connected by a folding rod. The rotation axis of the connection between the equal-sized flower plate and the folding rod is parallel to the projected profile surface forming the curved surface deployable mechanism, and the rotation axis is orthogonal to the connection line of the centers of the two adjacent equal-sized flower plates connected by the folding rod. When the upper curved surface deployable mechanism is fully deployed, the central node of the equal-sized flower plate is located within the upper curved surface of the upper curved surface deployable mechanism. When the lower curved surface deployable mechanism is fully deployed, the central node of the equal-sized flower plate is located within the lower curved surface of the lower curved surface deployable mechanism. The lower curved surface is a parabolic cylinder surface, the upper curved surface is a cylindrical surface, and the projected profile surface is a quasi-rectangular plane, which comprises a plurality of identical projected basic units. The projected basic units are respectively spliced and extended along the direction of their own bottom edges and the perpendicular direction of the bottom edges to form a projected profile surface with u rows and v columns, where both u and v are integers greater than or equal to 2. The projected basic unit comprises a first unit vertex, a second unit vertex, a third unit vertex and an in-unit point. The first unit vertex, the second unit vertex and the third unit vertex are respectively located at the vertices of the outer shape of the projected basic unit. The in-unit point is located on the perpendicular bisector of the bottom edge inside the projected basic unit. The first unit vertex, the second unit vertex and the third unit vertex are respectively projected onto the lower curved surface to obtain the positions of the equal-sized flower plates in the lower curved surface deployable mechanism. The in-unit point is projected onto the upper curved surface to obtain the positions of the equal-sized flower plates in the upper curved surface deployable mechanism. Six first hinge seats are distributed along the circumference of the outer ring of the equal-sized flower plate, and three second hinge seats are distributed along the circumference of the inner ring of the equal-sized flower plate. There is a height difference h in the normal direction of the plane of the equal-sized flower plate between the height of the first hinge seat and the height of the second hinge seat. The center of the first hinge seat is located on the plane where the center of the equal-sized flower plate is located, and the radial distance between the center of the first hinge seat and the center of the equal-sized flower plate is r1; there is a height difference h in the normal direction of the plane of the equal-sized flower plate between the height of the second hinge seat and the height of the first hinge seat, and the radial distance between the center of the second hinge seat and the center of the equal-sized flower plate is r2.

[0007] Preferably, the folding rod includes a first end hinge of the folding rod, a second end hinge of the folding rod, a first straight rod of the folding rod, a second straight rod of the folding rod, and an eccentric hinge. The first connection end of the first straight rod of the folding rod is connected to the first end hinge of the folding rod. The second connection end of the first straight rod of the folding rod is connected to the inner eccentric hinge seat of the eccentric hinge. The outer eccentric hinge seat of the eccentric hinge is connected to the first connection end of the second straight rod of the folding rod. The second connection end of the second straight rod of the folding rod is connected to the second end hinge of the folding rod.

[0008] Preferably, the eccentric hinge includes an inner eccentric hinge seat, an outer eccentric hinge seat, a torsion spring, and a pin shaft. The fixed ends of the inner eccentric hinge seat and the outer eccentric hinge seat are both cylindrical plugs. The axial width of the rotating end of the inner eccentric hinge seat is greater than the axial width of the rotating end of the outer eccentric hinge seat. The inner cavity with a groove and a limiting surface are provided at the rotating ends of the inner eccentric hinge seat and the outer eccentric hinge seat. The inner cavity of the rotating end of the inner eccentric hinge seat is connected to the inner cavity of the rotating end of the outer eccentric hinge seat through a torsion spring and a pin shaft. The axes of the cylindrical plugs are perpendicular to the rotation axes of the inner eccentric hinge seat and the outer eccentric hinge seat respectively.

[0009] Preferably, the rotation axes of the first end hinge of the folding rod, the second end hinge of the folding rod, and the eccentric hinge are parallel to each other. The difference in length between the first straight rod of the folding rod and the second straight rod of the folding rod is equal to the difference in length between the strut straight rod on the adjacent side of the first straight rod of the folding rod and the strut straight rod on the adjacent side of the second straight rod of the folding rod.

[0010] Preferably, the strut includes a strut straight rod, a first end hinge of the strut, and a second end hinge of the strut. The first connection end and the second connection end of the strut straight rod are respectively connected to the first end hinge of the strut and the second end hinge of the strut. The length of the strut straight rod is equal to the distance between the hinge seats on the equal-sized flower plates connected by the first end hinge and the second end hinge of the strut in the strut minus twice the length of the end hinge.

[0011] Preferably, the straight line directions of the parabolic cylinder surface and the cylindrical surface are respectively parallel to the bottom edge of the projection basic unit.

[0012] Preferably, the surface fitted by the central nodes of the equal-sized flower plates when the upper surface deployable mechanism is fully deployed is determined by adjusting the projection direction angle of the projection basic unit and the curvature of the upper surface.

[0013] Preferably, the axis of the hinge connection between the first end of the strut and the medium-sized flower plate of the upper surface deployable mechanism is parallel to the projected surface forming the upper surface deployable mechanism, and the axis of the hinge connection between the second end of the strut and the medium-sized flower plate of the lower surface deployable mechanism is parallel to the projected surface forming the lower surface deployable mechanism. The axis of the hinge connection between the first end of the strut and the medium-sized flower plate of the upper surface deployable mechanism is orthogonal to the line connecting the in-cell point of the projected surface forming the surface deployable mechanism and the cell vertex corresponding to the projection position on the medium-sized flower plate of the lower surface deployable mechanism. The axis of the hinge connection between the second end of the strut and the medium-sized flower plate of the lower surface deployable mechanism is orthogonal to the line connecting the in-cell point of the projected surface forming the surface deployable mechanism and the cell vertex corresponding to the projection position on the medium-sized flower plate of the lower surface deployable mechanism.

[0014] Preferably, in the deployed state, the distance between the upper surface deployable mechanism and the lower surface deployable mechanism is determined by the distance between the upper surface and the lower surface. The number and positions of the equal-sized flower plates are both determined by the projected surface, and the folded length is determined by the distance between two adjacent equal-sized flower plates.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The antenna device obtained by the present invention through the projected surface, upper surface and lower surface expanded by splicing the projected basic units has only one degree of freedom. The upper surface deployable mechanism and the lower surface deployable mechanism are synchronously deployed and retracted, and the deployment process is determined and unique. No additional conformal mechanism is required, and the deployment process is easy to control.

[0017] 2. The antenna device of the present invention has the characteristic of being completely retracted along the aperture direction, and the deployment-retraction ratio is large. The configuration process is convenient. After determining the size, number of rows u and number of columns v of the projected basic unit of the given projected surface, the upper surface, the lower surface, and the projection angle of the projected basic unit, the size of the parabolic cylinder antenna device can be obtained. Different-sized parabolic cylinder antenna devices can be obtained by modifying the number of rows u and number of columns v. The reflector surface of the parabolic cylinder antenna device with any aperture can be fitted by modifying the lower surface. Parabolic cylinder antenna devices with different deployment performances and deployment-retraction ratios can be obtained by modifying the upper surface and the projection angle of the projected basic unit to meet various complex engineering requirements.

[0018] 3. The parts of the parabolic cylinder antenna device of the present invention are of a single type. The types of the end hinges in the equal-sized flower plates, struts and folding rods and the eccentric hinges in the folding rods are all one. The connection pairs between the equal-sized flower plates, struts and folding rods are all rotating pairs, which are easier to process and achieve high precision compared with spherical pairs and universal pairs, are easy to process and assemble, and are suitable for rapid mass production. Description of the Drawings

[0019] Figure 1 This is the structural diagram of the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0020] Figure 2 This is the unfolded diagram of the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0021] Figure 3 This is the diagram of the hinge position relationship of the equal-size flower plates in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0022] Figure 4 This is the structural diagram of the equal-size flower plates in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0023] Figure 5 This is the structural diagram of the folding rod in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0024] Figure 6 This is the structural diagram of the eccentric hinge in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0025] Figure 7 This is the structural diagram of the strut in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0026] Figure 8 This is the semi-unfolded diagram of the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0027] Figure 9 This is the fully retracted diagram of the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0028] Figure 10 This is the projected surface diagram of the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention;

[0029] Figure 11 This is the diagram of the positions of the projected basic unit and the flower plate nodes in the full-rotating-pair framework parabolic cylinder antenna device based on equal-size flower plates of the present invention.

[0030] Main reference numerals:

[0031] Upper surface deployable mechanism 1, lower surface deployable mechanism 2, strut 3, straight strut 31 of the strut, first end hinge 32 of the strut, second end hinge 33 of the strut, equal-size flower plate 4, axis Ai (i = 1, 2, 3, 4, 5, 6) of the first hinge seat, axis Bi (i = 1, 2, 3) of the second hinge seat, folding rod 5, eccentric hinge 51, inner eccentric hinge seat 511, outer eccentric hinge seat 512, torsion spring 513, first end hinge 52 of the folding rod, second end hinge 53 of the folding rod, first straight rod 54 of the folding rod, second straight rod 55 of the folding rod, projection basic unit 6, first unit vertex 61, second unit vertex 62, third unit vertex 63, in-unit point 64, lower surface f1, upper surface f2. Detailed implementation mode

[0032] To elaborate on the technical content, structural features, achieved objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings of the specification.

[0033] The full-rotating pair framework parabolic cylinder antenna device based on an equal-size flower plate has advantages such as few degrees of freedom, single types of kinematic pairs and flower plates, thus obtaining an optimized antenna device. As Figure 1 and Figure 2 shown, it includes an upper surface deployable mechanism 1 and a lower surface deployable mechanism 2. The upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 are placed facing each other. During the movement process, the folding rod 5 in the upper surface deployable mechanism 1 folds downward, and the folding rod 5 in the lower surface deployable mechanism 2 folds upward, and is limited at the position where the first straight rod 54 and the second straight rod 55 of the folding rod 5 are collinear when unfolded. The upper surface deployable mechanism 1 is rotationally connected to the lower surface deployable mechanism 2 through the strut 3. The antenna device rotationally connected by the upper surface deployable mechanism 1 through the strut 3 and the lower surface deployable mechanism 2 is a single-degree-of-freedom full-rotating pair deployable device. The unfolding process of the antenna device is a single-degree-of-freedom movement. All the equal-size flower plates 4 of the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 move away synchronously, and the torsion springs 513 of the eccentric hinges 51 in all the folding rods 5 unfold synchronously. The relative movement relationships of all the struts 3, equal-size flower plates 4 and folding rods 5 inside the antenna device are determined and unique. The unfolding drive is the kinetic energy generated by the release of each torsion spring 513. Specifically, the scales of the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 are determined by the projection profile, and the connection methods of the strut 3 with the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 are also determined by the projection profile.

[0034] The axis connecting the first end hinge 32 of the strut to the equal-size flower plate 4 in the upper surface deployable mechanism 1 and the axis connecting the second end hinge 33 of the strut to the equal-size flower plate 4 in the lower surface deployable mechanism 2 are respectively parallel to the projection profile and orthogonal to the connection line between the in-unit point 64 and the unit vertex corresponding to the position projected onto the equal-size flower plate 4 in the lower surface deployable mechanism 2.

[0035] The upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 have the same structure, including equal-sized flower plates 4 and folding rods 5. In the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2, two adjacent equal-sized flower plates 4 are connected by a folding rod 5. The rotation axis of the connection between the equal-sized flower plate 4 and the folding rod 5 is parallel to the projection surface, and the rotation axis is orthogonal to the connection line of the center points of the two adjacent equal-sized flower plates 4 connected by the folding rod 5. In the unfolded state, the distance between the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 is determined by the distance between the upper surface f2 and the lower surface f1. The number and positions of the equal-sized flower plates 4 are determined by projecting the projection surface onto the lower surface f1 and the upper surface f2. The planes where the equal-sized flower plates are located are parallel to each other. The postures of the equal-sized flower plates 4 in the same layer of the surface deployable mechanism are the same. The centers of the equal-sized flower plates 4 in the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 are symmetric. The length of the folding rod 5 is determined by the distance between two adjacent equal-sized flower plates 4.

[0036] When the upper surface deployable mechanism 1 is fully unfolded, the central nodes of the equal-sized flower plates 4 are located within the upper surface f2. When the lower surface deployable mechanism 2 is fully unfolded, the central nodes of the equal-sized flower plates 4 are located within the lower surface f1. The lower surface f1 is a parabolic cylinder surface, and the upper surface f2 is a cylinder surface. The linear directions of the parabolic cylinder surface and the cylinder surface are respectively parallel to the bottom edge of the projection basic unit 6. The linear direction of the parabolic cylinder surface is parallel to the connection line direction of the second unit vertex 62 and the third unit vertex 63, and the linear direction of the cylinder surface is parallel to the connection line direction of the second unit vertex 62 and the third unit vertex 63.

[0037] As Figure 10 shown, the projection surface is a quasi-rectangular plane, including a plurality of identical projection basic units 6. The projection basic units 6 are respectively spliced and extended along their own bottom edge direction and the perpendicular direction of the bottom edge to form a projection surface with u rows and v columns. Both u and v are integers greater than or equal to 2. As the number of projection basic units 6 increases in both directions, the aperture of the parabolic cylinder antenna device formed becomes larger. Projecting the multiple identical projection basic units 6 in the projection surface onto the upper surface f1 and the lower surface f2 respectively can obtain Figure 1 the positions of the equal-sized flower plates 4 in the parabolic cylinder antenna device shown.

[0038] The projection basic unit 6, as Figure 11As shown, it includes a first unit vertex 61, a second unit vertex 62, a third unit vertex 63 and an in-unit point 64. The first unit vertex 61, the second unit vertex 62 and the third unit vertex 63 are respectively located at the vertices of the outer shape of the projection basic unit 6. The in-unit point 64 is located on the perpendicular bisector of the bottom side inside the projection basic unit 6. The first unit vertex 61, the second unit vertex 62 and the third unit vertex 63 are respectively projected downward onto the lower surface f1 to obtain the position of the medium-sized flower plate 4 in the lower surface deployable mechanism 2. The in-unit point 64 is projected upward onto the upper surface f2 to obtain the position of the medium-sized flower plate 4 in the upper surface deployable mechanism 1.

[0039] As Figure 3 and Figure 4 shown, six first hinge seats are distributed along the circumference of the outer ring of the equal-sized flower plate 4. The axes of the six first hinge seats are respectively A1, A2, A3, A4, A5 and A6. The axes A1, A2, A3, A4, A5, A6 and the central node O of the equal-sized flower plate 4 are coplanar and are used to connect the folding rods 5. Three second hinge seats are distributed along the circumference of the inner ring of the equal-sized flower plate 4. The axes of the three second hinge seats are respectively B1, B2 and B3. The axes B1, B2 and B3 are coplanar and are used to connect the struts 3. There is a height difference h between the height of the first hinge seat and the height of the second hinge seat in the plane normal direction of the equal-sized flower plate 4, which is convenient for processing and dimension adjustment, and the height difference h does not affect the degrees of freedom of the antenna device. The included angle α between two adjacent first hinge seats, the included angle β between two adjacent second hinge seats, and the included angle γ between an adjacent first hinge seat and a second hinge seat in the plane normal direction of the equal-sized flower plate 4 are all determined according to the projection profile. Specifically, the center of the first hinge seat is located on the plane where the center of the equal-sized flower plate 4 is located, and the radial distance between the center of the first hinge seat and the center of the equal-sized flower plate 4 is r1; there is a height difference h between the height of the second hinge seat and the height of the first hinge seat in the plane normal direction of the equal-sized flower plate 4, and the radial distance between the center of the second hinge seat and the center of the equal-sized flower plate 4 is r2. The first hinge seat is used to connect the folding rod 5, and the second hinge seat is used to connect the strut 3.

[0040] The folding rod 5, as Figure 5As shown, it includes the first-end hinge 52 of the folding rod, the second-end hinge 53 of the folding rod, the first straight rod 54 of the folding rod, the second straight rod 55 of the folding rod, and the eccentric hinge 51. The axis C2 of the turning pair of the first-end hinge 52 of the folding rod, the axis C3 of the turning pair of the second-end hinge 53 of the folding rod, and the axis C1 of the turning pair of the eccentric hinge 51 are parallel to each other. The first connection end of the first straight rod 54 of the folding rod is connected to the first-end hinge 52 of the folding rod, the second connection end of the first straight rod 54 of the folding rod is connected to the inner eccentric hinge seat 511 of the eccentric hinge 51, the outer eccentric hinge seat 512 of the eccentric hinge 51 is connected to the first connection end of the second straight rod 55 of the folding rod, and the second connection end of the second straight rod 55 of the folding rod is connected to the second-end hinge 53 of the folding rod. Specifically, when the axis C2 of the turning pair of the first-end hinge 52 of the folding rod is connected to the axis A1 of the first hinge seat of the equal-sized flower disc 4, the axis C3 of the turning pair of the second-end hinge 53 of the folding rod is connected to the axis A4 of the first hinge seat of the adjacent equal-sized flower disc 4.

[0041] The eccentric hinge 51, as Figure 6 shown, includes an inner eccentric hinge seat 511, an outer eccentric hinge seat 512, a torsion spring 513, and a pin shaft. The fixed ends of both the inner eccentric hinge seat 511 and the outer eccentric hinge seat 512 are cylindrical plugs, which are used to be inserted into the straight rod and fixedly connected using a positioning pin. The axial width of the rotating end of the inner eccentric hinge seat 511 is greater than the axial width of the rotating end of the outer eccentric hinge seat 512. When cooperating with the outer eccentric hinge seat 512, the inner wall of the inner eccentric hinge seat 511 fits with the outer wall of the outer eccentric hinge seat 512. The rotating ends of the inner eccentric hinge seat 511 and the outer eccentric hinge seat 512 are provided with an inner cavity with a groove and a limiting surface. The groove is used to place the torsion spring rod to convert the potential energy of the torsion spring into deployment kinetic energy. When the folding rod 5 is deployed until the first straight rod 54 and the second straight rod 55 of the folding rod are collinear, the limiting surfaces of the inner eccentric hinge seat 511 and the outer eccentric hinge seat 512 are in contact and limit the folding rod 5 from continuing to deploy; the inner cavity of the rotating end of the inner eccentric hinge seat 511 is rotationally connected to the inner cavity of the rotating end of the outer eccentric hinge seat 512 through the torsion spring 513 and the pin shaft, and the axis of the turning pair is C1. The axis D1 of the cylindrical joint of the inner eccentric hinge seat 511 is not coplanar with the axis C1 of the turning pair of the torsion spring 513, and the axis D2 of the cylindrical joint of the outer eccentric hinge seat 512 is not in the same plane as the axis C1 of the turning pair of the torsion spring 513, being in a non-coplanar state to achieve the hinge eccentricity effect and avoid interference problems during the folding and unfolding process of the folding rod.

[0042] Further, to ensure that the antenna device is fully retracted along the aperture direction to maximize the expansion and contraction ratio in the aperture direction, the lengths of the first straight rod 54 and the second straight rod 55 of the folding rod 5 in the folding rod are determined by the length of the adjacent straight rod 31 of the strut. The length relationship is: the difference between the lengths of the first straight rod 54 and the second straight rod 55 of the folding rod is equal to the difference between the lengths of the straight rod 31 of the strut adjacent to the first straight rod 54 of the folding rod and the straight rod 31 of the strut adjacent to the second straight rod 55 of the folding rod.

[0043] The strut 3, as Figure 7 shown, includes a strut straight rod 31, a first end hinge 32 of the strut, and a second end hinge 33 of the strut. The first connection end and the second connection end of the strut straight rod 31 are respectively connected to the first end hinge 32 and the second end hinge 33 of the strut. The axis E1 of the rotating pair of the first end hinge 32 of the strut is parallel to the axis E2 of the rotating pair of the second end hinge 33 of the strut. The length of the strut straight rod 31 is determined according to the parabolic cylinder surface fitted by the lower surface f1, the cylindrical surface fitted by the upper surface f2, and the projection surface. The length of the strut straight rod 31 is equal to the distance between the hinge seats in the equal-sized flower plate 4 connected by the first end hinge 32 and the second end hinge 33 of the strut 3 minus twice the length of the end hinge. The first end hinge 32 of the strut is embedded in the hinge seat of the equal-sized flower plate 4 of the upper surface deployable mechanism 1, so that the axis E1 of the rotating pair of the first end hinge 32 of the strut is collinear with the axis B1 or B2 or B3 of the second hinge seat of the equal-sized flower plate 4 of the upper surface deployable mechanism 1; the second end hinge 33 of the strut is embedded in the hinge seat of the equal-sized flower plate 4 of the lower surface deployable mechanism 2, so that the axis E2 of the rotating pair of the second end hinge 33 of the strut is collinear with the axis B1 or B2 or B3 of the second hinge seat of the equal-sized flower plate 4 of the lower surface deployable mechanism 2.

[0044] Further, in the antenna device of the present invention, the types of the equal-sized flower plate 4 and the eccentric hinge 51 are unique, and the sizes of the first end hinge 32 of the strut, the second end hinge 33 of the strut, the first end hinge 52 of the folding rod, and the second end hinge 53 of the folding rod are the same. By changing the projection surface, the upper surface f2, and the lower surface f1, the lengths of the strut straight rod 31, the first straight rod 54 of the folding rod, and the second straight rod 55 of the folding rod can be obtained to realize the fitting of different parabolic cylinders, and then parabolic cylinder antenna devices with different apertures and shapes can be constructed. The projection direction angle between the surface of the antenna device and the directrix of the parabolic cylinder is variable, and the surface fitted by the central node of the equal-sized flower plate 4 when the upper surface deployable mechanism 1 is fully unfolded is also variable. By adjusting the projection direction angle of the projection basic unit 6 and the curvature of the upper surface f2, the length uniformity of the strut 3 in the antenna device can be changed, so as to meet the expansion and contraction ratio requirements of the antenna device.

[0045] The following further describes an all-rotating pair frame type parabolic cylinder antenna device based on an equal-sized flower disc according to the present invention in conjunction with embodiments:

[0046] In a specific embodiment of the present invention, first project the first unit vertex 61, the second unit vertex 62, and the third unit vertex 63 of the projection basic unit 6 onto the lower layer surface f1 to obtain the central nodes of the first equal-sized flower disc 5A, the second equal-sized flower disc 5B, and the third equal-sized flower disc 5C of the lower layer surface deployable mechanism 2, and project the in-unit point 64 of the projection basic unit 6 onto the upper layer surface f2 to obtain the central node of the fourth equal-sized flower disc 5D of the upper layer surface deployable mechanism 1.

[0047] Then determine the attitude relationship of the equal-sized flower discs 4 in the upper layer surface deployable mechanism 1 and the lower layer surface deployable mechanism 2: The first equal-sized flower disc 5A, the second equal-sized flower disc 5B, and the third equal-sized flower disc 5C are located in the lower layer surface deployable mechanism 2, and the attitudes of the three equal-sized flower discs are the same. The fourth equal-sized flower disc 5D is located in the upper layer surface deployable mechanism 1 and is placed opposite to the equal-sized flower disc 4 in the lower layer surface deployable mechanism 2. The specific positional relationship is: The axis B1 of the fourth equal-sized flower disc 5D is parallel to the axis B1 of the first equal-sized flower disc 5A or the second equal-sized flower disc 5B or the third equal-sized flower disc 5C; the axis B2 of the fourth equal-sized flower disc 5D is parallel to the axis B3 of the first equal-sized flower disc 5A or the second equal-sized flower disc 5B or the third equal-sized flower disc 5C; the axis B3 of the fourth equal-sized flower disc 5D is parallel to the axis B2 of the first equal-sized flower disc 5A or the second equal-sized flower disc 5B or the third equal-sized flower disc 5C.

[0048] Next, the equal-sized flower plates 4 in the upper surface developable mechanism 1 and the lower surface developable mechanism 2 are connected by the support rods 3. Some of the connection relationships are as follows: The fourth equal-sized flower plate 5D is connected to the first equal-sized flower plate 5A by the support rod 3, such that the axis E1 of the first end hinge 32 of the support rod 3 coincides with the axis B1 of the second hinge seat in the fourth equal-sized flower plate 5D, and the axis E2 of the second end hinge 33 of the support rod 3 coincides with the axis B1 of the second hinge seat in the first equal-sized flower plate 5A. The above-mentioned axes are parallel to the projection surface and orthogonal to the line connecting the unit interior point 64 and the first unit vertex 61; The fourth equal-sized flower plate 5D is connected to the second equal-sized flower plate 5B by the support rod 3, such that the axis E1 of the first end hinge 32 of the support rod 3 coincides with the axis B3 of the second hinge seat in the fourth equal-sized flower plate 5D, and the axis E2 of the second end hinge 33 of the support rod 3 coincides with the axis B2 of the second hinge seat in the second equal-sized flower plate 5B. The above-mentioned axes are parallel to the projection surface and orthogonal to the line connecting the unit interior point 64 and the first unit vertex 62; The fourth equal-sized flower plate 5D is connected to the third equal-sized flower plate 5C by the support rod 3, such that the axis E1 of the first end hinge 32 of the support rod 3 coincides with the axis B2 of the second hinge seat in the fourth equal-sized flower plate 5D, and the axis E2 of the second end hinge 33 of the support rod 3 coincides with the axis B3 of the second hinge seat in the third equal-sized flower plate 5C. The above-mentioned axes are parallel to the projection surface and orthogonal to the line connecting the unit interior point 64 and the first unit vertex 63.

[0049] Finally, when multiple projection basic units 6 are spliced and projected, there will be a situation where an equal-sized flower plate 4 is shared at the splicing node. After multiple projection basic units 6 are projected, the number and positions of the equal-sized flower plates 4 in the upper surface mechanism 1 and the equal-sized flower plates 4 in the lower surface mechanism 2 are respectively determined. The equal-sized flower plates 4 in the same surface mechanism are all rotationally connected by the folding rods 5.

[0050] In this specific embodiment, the projection basic unit 6 can be triangular or rectangular. For the parabolic cylinder antenna device formed by the above method, the projection direction angle δ between its surface and the directrix of the parabolic cylinder is variable, and the upper surface f2 is also variable. By adjusting the projection direction angle δ and the curvature of the upper surface f2, the length uniformity of the straight rods 31 of the support rods in the parabolic cylinder antenna device can be changed, so as to meet the requirements of the deployment and retraction ratio of the antenna device.

[0051] Unfold and fold the obtained parabolic cylinder antenna device, as Figure 8As shown in the figure, it is the unfolding process of the parabolic cylinder antenna device of the present invention. Its unfolding process is a single-degree-of-freedom movement. All the equal-sized flower plates 4 of the upper surface deployable mechanism 1 and the lower surface deployable mechanism 2 move away synchronously. The torsion springs 513 in the eccentric hinges 51 of all the folding rods 5 deploy synchronously. The relative movement relationships of all the struts 3, equal-sized flower plates 4, and folding rods 5 inside the antenna device are determined and unique. The unfolding drive is the kinetic energy generated by the release of each torsion spring 513. Figure 9 It is the retracted state of the parabolic cylinder antenna device of the present invention. The retracting process is opposite to the unfolding process.

[0052] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A fully rotating sub-frame parabolic antenna device based on an equal-size faceplate, comprising an upper curved surface deployable mechanism and a lower curved surface deployable mechanism, the upper curved surface deployable mechanism and the lower curved surface deployable mechanism are placed opposite to each other and are rotatably connected by a strut, characterized in that: The upper curved surface deployable mechanism and the lower curved surface deployable mechanism respectively include equal-sized flower discs and folding rods, two adjacent equal-sized flower discs are connected by the folding rod, the rotation axis connecting the equal-sized flower discs and the folding rod is parallel to the projection profile of the curved surface deployable mechanism, and the rotation axis is orthogonal to the line connecting the center points of the two adjacent equal-sized flower discs connected by the folding rod; When the upper curved surface deployable mechanism is fully deployed, the center node of the equal-size flower disk is located in the upper curved surface of the upper curved surface deployable mechanism, and when the lower curved surface deployable mechanism is fully deployed, the center node of the equal-size flower disk is located in the lower curved surface of the lower curved surface deployable mechanism, the lower curved surface is a parabolic cylinder, the upper curved surface is a cylinder, and the projection profile is a quasi-rectangular plane, which includes a plurality of identical projection basic units, and the projection basic units are respectively spliced ​​and expanded along the bottom edge direction and the vertical line direction of the bottom edge to form a projection profile with u rows and v columns, and u and v are both integers greater than or equal to 2; The projection basic unit comprises a first unit vertex, a second unit vertex, a third unit vertex and a unit internal point, wherein the first unit vertex, the second unit vertex and the third unit vertex are respectively located at the vertices of the outer shape of the projection basic unit, and the unit internal point is located on the perpendicular midline of the bottom edge inside the projection basic unit, and the first unit vertex, the second unit vertex and the third unit vertex are respectively projected on the lower curved surface to obtain the position of the middle-sized faceplate of the lower curved surface deployable mechanism, and the unit internal point is projected on the upper curved surface to obtain the position of the middle-sized faceplate of the upper curved surface deployable mechanism; The outer circle of the equal-sized flower disc has six first hinge seats distributed along the circumference, and the inner circle of the equal-sized flower disc has three second hinge seats distributed along the circumference. The center of the first hinge seat is located on the plane where the center of the equal-sized flower disc is located, and the radial distance between the center of the first hinge seat and the center of the equal-sized flower disc is r1; there is a height difference h between the height of the second hinge seat and the height of the first hinge seat in the plane normal direction of the equal-sized flower disc, and the radial distance between the center of the second hinge seat and the center of the equal-sized flower disc is r2.

2. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1 is characterized in that: The folding rod comprises a hinge at the first end of the folding rod, a hinge at the second end of the folding rod, a first straight rod of the folding rod, a second straight rod of the folding rod and an eccentric hinge. The first connecting end of the first straight rod of the folding rod is hingedly connected to the first end of the folding rod, the second connecting end of the first straight rod of the folding rod is connected to the inner eccentric hinge seat of the eccentric hinge, the outer eccentric hinge seat of the eccentric hinge is connected to the first connecting end of the second straight rod of the folding rod, and the second connecting end of the second straight rod of the folding rod is hingedly connected to the second end of the folding rod.

3. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 2 is characterized in that: The eccentric hinge comprises an inner eccentric hinge seat, an outer eccentric hinge seat, a torsion spring and a pin shaft. The fixed ends of the inner eccentric hinge seat and the outer eccentric hinge seat are both cylindrical plugs. The axial width of the rotating end of the inner eccentric hinge seat is greater than the axial width of the rotating end of the outer eccentric hinge seat. The rotating ends of the inner eccentric hinge seat and the outer eccentric hinge seat are provided with an inner cavity with a groove and a limiting surface. The inner cavity of the rotating end of the inner eccentric hinge seat is connected to the inner cavity of the rotating end of the outer eccentric hinge seat through a torsion spring and a pin shaft. The axis of the cylindrical plug is perpendicular to the rotating axis of the inner eccentric hinge seat and the outer eccentric hinge seat, respectively.

4. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 2 or 3, characterized in that: The rotation axes of the first end hinge of the folding rod, the second end hinge of the folding rod and the eccentric hinge are parallel to each other, and the difference in length between the first straight rod of the folding rod and the second straight rod of the folding rod is equal to the difference in length between the support rod straight rod on the adjacent side of the first straight rod of the folding rod and the support rod straight rod on the adjacent side of the second straight rod of the folding rod.

5. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1 is characterized in that: The support rod comprises a support rod straight rod, a support rod first end hinge and a support rod second end hinge. The first connecting end and the second connecting end of the support rod straight rod are respectively connected to the support rod first end hinge and the support rod second end hinge. The length of the support rod straight rod is equal to the hinge seat spacing in the same size flower disk connected to the support rod first end hinge and the support rod second end hinge in the support rod minus twice the length of the end hinge.

6. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1 is characterized in that: The straight line directions of the parabolic cylinder and the cylinder are respectively parallel to the bottom edge of the projection basic unit.

7. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1 or 6, characterized in that: When the upper curved surface deployable mechanism is fully deployed, the curved surface fitted by the central nodes of the equal-sized faceplates is determined by adjusting the projection direction angle of the projection basic unit and the curvature of the upper curved surface.

8. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1 is characterized in that: The axis connecting the hinge of the first end of the strut and the medium-sized faceplate of the upper curved surface expandable mechanism is parallel to the projection surface of the upper curved surface expandable mechanism, the axis connecting the hinge of the second end of the strut and the medium-sized faceplate of the lower curved surface expandable mechanism is parallel to the projection surface of the lower curved surface expandable mechanism, the axis connecting the hinge of the first end of the strut and the medium-sized faceplate of the upper curved surface expandable mechanism is orthogonal to the line connecting the unit inner point of the projection surface of the curved surface expandable mechanism and the unit vertex corresponding to the position of the medium-sized faceplate of the lower curved surface expandable mechanism projected, and the axis connecting the hinge of the second end of the strut and the medium-sized faceplate of the lower curved surface expandable mechanism is orthogonal to the line connecting the unit inner point of the projection surface of the curved surface expandable mechanism and the unit vertex corresponding to the position of the medium-sized faceplate of the lower curved surface expandable mechanism projected.

9. The fully rotating sub-frame parabolic antenna device based on equal-size faceplates according to claim 1, characterized in that: In the unfolded state, the distance between the upper curved surface expandable mechanism and the lower curved surface expandable mechanism is determined by the distance between the upper curved surface and the lower curved surface, the number of equal-sized flower discs and the positions of the equal-sized flower discs are determined by the projection profile, and the folded length is determined by the distance between two adjacent equal-sized flower discs.

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