Bidirectional flat antenna folding and unfolding mechanism based on scissor-type space folding and unfolding unit

Abstract

The present invention provides a bidirectional flat antenna folding and unfolding mechanism based on a scissor-fork space folding and unfolding unit, which comprises a scissor-fork space folding and unfolding unit, an antenna panel, a satellite body, a folding mechanism and a hinge assembly. The satellite body is located directly above the center of the antenna panel, panels located on the front and rear sides of the satellite body in the antenna panel are connected to the satellite body through the folding mechanism, panels located on the left and right sides of the satellite body in the antenna panel are connected through the scissor-fork space folding and unfolding unit, and adjacent panels are connected through the hinge assembly. The connection method between the components in the present invention only comprises a rotating pair, the structure is simple, and there is only one degree of freedom. Only one drive needs to be added to realize expansion and folding. The present invention has the advantages of simple structure, high structural rigidity, high stability, etc., can realize bidirectional folding and unfolding, and is conducive to realizing the folding and unfolding of a planar antenna with a larger physical caliber and high rigidity.

Description

Technical Field

[0001] The invention belongs to a space deployable mechanism, and in particular relates to a bidirectional flat antenna folding and unfolding mechanism based on a scissor-type space folding and unfolding unit. Background Art

[0002] With the rapid development of aerospace technology, aerospace technology occupies an important position in my country's strategic planning for scientific and technological development, and aerospace engineering has an increasingly urgent need for large deployable structures. However, due to the limitations of storage capacity in aerospace engineering, the demand for deployable antennas with high folding rate, high stiffness, and high stability has become increasingly urgent. The deployable structure is in a folded state during storage and transportation. When placed in the working track and ready, the drive device can unfold it into a predetermined working state.

[0003] The research on deployable antenna mechanism has become a research hotspot in the world today. However, among the deployable antenna mechanisms, the planar deployable antenna mechanism is an indispensable field. Research institutions in the United States, Japan, Germany, Russia and other countries have successively proposed various forms of satellite-borne planar antenna mechanisms. The pioneer of satellite-borne planar antenna was the Seasat SAR launched by the United States in 1978 to demonstrate the feasibility of measuring ocean dynamics. It consists of 8 The Radarsat-2 satellite was launched in 2007. The flat antenna consists of four antenna panels. The support mechanism is based on Radarsat-1, but a set of middle support rods are removed, and small sections of diagonal rods are left on the diagonal support rods to compensate for the thickness of the plate, making the structure more compact. The LLSBR large space radar of the L-band was jointly developed by the U.S. Air Force and JPL Laboratory. Every two units are combined into a module, and the single-module antenna is supported by a four-prism deployable mechanism. China started late in this regard. Zhejiang University, Tongji University, Tianjin University and Harbin Institute of Technology have conducted research in this area, focusing on the design of space station antennas, extension arms and foldable grid structures. Harbin Institute of Technology has developed a deployable planar antenna support mechanism with a quadrangular pyramid side, and the Shanghai Institute of Aerospace Systems Engineering has developed a folding mechanism for multi-panel foldable antennas for spacecraft.

[0004] In recent years, the demand for high-resolution imaging and the development trend of large sizes have posed new challenges to the performance of deployable mechanisms, requiring flat-panel deployable antenna mechanisms to be able to be deployed in both directions, but there are currently few reports on two-way flat-panel folding and unfolding mechanisms. Patent CN202110911953.3 proposes a two-way flat-panel folding and unfolding unit and a two-way flat-panel folding and unfolding antenna mechanism, and patent CN202011630804.1 proposes a flat-panel antenna folding and unfolding unit and a two-dimensional folding and unfolding antenna mechanism, but the two mechanisms have the same axial direction of the kinematic sub-axis and are planar mechanisms. After unfolding, the phased array antenna has low stiffness and poor stability. Other two-way flat-panel folding and unfolding mechanism panels are only connected by a connection, and there is no support mechanism. The solar wing is a common two-dimensional flat folding and unfolding mechanism at present, but the vast majority of solar wing panels are also connected by hinges, and no support mechanism is used to connect them.

[0005] In order to meet the growing demand for flat-plate foldable antennas in space, it is of great significance to propose more types of bidirectional flat-plate foldable antenna mechanisms with high rigidity, good stability, simple structure and easy control. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a bidirectional flat antenna folding and unfolding mechanism based on a scissor-type space folding and unfolding unit. The connection method between the components only includes a revolute pair, the structure is simple, and there is only one degree of freedom. Only one drive needs to be added to realize the unfolding and folding. It has the advantages of simple structure, high structural rigidity, high stability, etc., can realize bidirectional folding and unfolding, and is conducive to realizing the folding and unfolding of planar antennas with larger physical caliber and high rigidity.

[0007] The present invention provides a bidirectional flat-panel antenna folding and unfolding mechanism based on a scissor-fork space folding and unfolding unit, which comprises a scissor-fork space folding and unfolding unit, an antenna panel, a satellite body, a folding mechanism and a hinge assembly, wherein the satellite body is located directly above the center of the antenna panel, and the panels of the antenna panel located on the front and rear sides of the satellite body are connected to the satellite body through the folding mechanism, and the panels of the antenna panel located on the left and right sides of the satellite body are connected through the scissor-fork space folding and unfolding unit, and adjacent panels are connected through the hinge assembly, and the scissor-fork space folding and unfolding unit comprises a first connecting seat, a second connecting seat, a third connecting seat, a fourth connecting seat, a first support rod, a second support rod, a third support rod, a fourth support rod, a first flower disc, a second flower disc, a first scissor rod and a second scissor rod, the first connecting seat and the third connecting seat are fixedly mounted on the first antenna panel, the second connecting seat and the fourth connecting seat are fixedly mounted on the second antenna panel, and the first connecting seat is connected to the second connecting seat, the third connecting seat The seat is symmetrically arranged with the fourth connecting seat, the first end of the first support rod is connected to the first connecting seat, the first end of the second support rod is connected to the second connecting seat, the second end of the first support rod is connected to the first end of the first face disc, the second end of the second support rod is connected to the second end of the first face disc, the first end of the third support rod is connected to the third connecting seat, the second end of the third support rod is connected to the first end of the second face disc, the first end of the fourth support rod is connected to the fourth connecting seat, the second end of the fourth support rod is connected to the second end of the second face disc, and the third end of the first face disc is connected to the third end of the second face disc through a scissors mechanism; the first support rod and the second support rod are respectively connected to the first face disc through a rotating pair I and a rotating pair J, the third support rod and the fourth support rod are respectively connected to the second face disc through a rotating pair D and a rotating pair E, and the rotating pair D is parallel to the axis of the rotating pair J, and the rotating pair E is parallel to the axis of the rotating pair I.The antenna panel includes a first antenna panel, a second antenna panel, a third antenna panel, a fourth antenna panel, a fifth antenna panel, a sixth antenna panel, a seventh antenna panel, an eighth antenna panel and a ninth antenna panel, each panel is arranged in a square shape, the fifth antenna panel is fixedly installed directly below the satellite body, the sixth antenna panel and the fourth antenna panel are symmetrically arranged on the front and rear sides of the satellite body, the second antenna panel and the eighth antenna panel are symmetrically arranged on the left and right sides of the satellite body, the second antenna panel, the fourth antenna panel, the sixth antenna panel and the eighth antenna panel are respectively rotatably connected to the fifth antenna panel through a first hinge, and the first antenna panel The panel is connected to the second antenna panel through a scissors-type space folding and unfolding unit, the seventh antenna panel is connected to the eighth antenna panel through a scissors-type space folding and unfolding unit, and the adjacent edges of the first antenna panel and the second antenna panel are rotatably connected through a second hinge, the seventh antenna panel is rotatably connected to the eighth antenna panel through a second hinge, the fourth antenna panel and the sixth antenna panel are respectively connected to the satellite body through a folding mechanism, and the first antenna panel and the second antenna panel, the second antenna panel and the third antenna panel, the seventh antenna panel and the eighth antenna panel, and the eighth antenna panel and the ninth antenna panel are all connected through a scissors-type space folding and unfolding unit.

[0008] Preferably, the folding mechanism includes a first folding rod, a second folding rod, a third folding rod and a fourth folding rod, the fourth antenna panel and the sixth antenna panel located on the front and rear sides of the satellite body are respectively connected to the first end of the second folding rod through a connecting seat, the first end of the first folding rod is connected to the second end of the second folding rod, the second end of the first folding rod is connected to the first end of the third folding rod, the second end of the third folding rod is connected to the first end of the fourth folding rod, the second end of the fourth folding rod is connected to the satellite body through a connecting seat, and the third end of the first folding rod is connected to the satellite body through a connecting seat.

[0009] Preferably, the scissors mechanism includes a first scissors rod and a second scissors rod, the six first scissors rods and the second scissors rods are connected in sequence via a rotating pair, the first support rod is connected to the first antenna panel via a first connecting seat, and the first support rod and the first connecting seat are connected via a rotating pair, the second support rod is connected to the second antenna panel via a second connecting seat, and the second support rod and the second connecting seat are connected via a rotating pair, and the connecting seat on the antenna panel is rotatably connected to the support rod.

[0010] Preferably, the nine-panel antenna folding and unfolding mechanism is in a folded state, and each panel of the antenna panels is folded on the left and right sides and the bottom of the satellite body respectively, the first antenna panel, the second antenna panel and the third antenna panel are folded on the left side of the satellite body, the seventh antenna panel, the eighth antenna panel and the ninth antenna panel are folded on the right side of the satellite body, the fourth antenna panel, the fifth antenna panel and the sixth antenna panel are folded at the bottom of the satellite body, the first support rod, the second support rod, the third support rod and the fourth support rod are close to and folded, the scissors mechanism is fully unfolded, and the scissors space folding unit and the folding mechanism are completely folded.

[0011] Preferably, the antenna panels in the ten-panel antenna folding and unfolding mechanism are arranged in two rows, and five panels are provided in each row, the satellite body is fixedly installed directly above the fifth antenna panel, the panels located on the left and right sides of the satellite body are connected through the scissors-space folding and unfolding unit, the sixth antenna panel located on the front side of the satellite body is connected to the satellite body through a folding mechanism, the first antenna panel and the second antenna panel, the seventh antenna panel and the eighth antenna panel are respectively connected through the scissors-space folding and unfolding unit, and the scissors-space folding and unfolding unit is connected to the satellite body through a synchronization rod, the second antenna panel and the seventh antenna panel are respectively connected to the fifth antenna panel through a first hinge, and the first hinge is horizontally installed, the third antenna panel is connected to the fourth antenna panel through a first hinge, the ninth antenna panel is connected to the tenth antenna panel through a first hinge, the fourth antenna panel and the sixth antenna panel, the sixth antenna panel and the tenth antenna panel are respectively connected to the fifth antenna panel through a second hinge, and the second hinge is vertically installed.

[0012] Preferably, the hinge assembly includes a first hinge and a second hinge, the first hinge includes a first horizontal hinge and a second horizontal hinge, the first horizontal hinge is connected to the second horizontal hinge via a rotating pair G, the second hinge includes a first vertical hinge and a second vertical hinge, the first vertical hinge is connected to the second vertical hinge via a rotating pair H, and when the antenna folding mechanism is in the unfolded state, the axes of the rotating pair G and the rotating pair H are perpendicular.

[0013] Preferably, the ten-panel antenna folding and unfolding mechanism is in a folded state, and each panel of the antenna panels is folded on the left and right sides and the bottom of the satellite body respectively, the first antenna panel, the second antenna panel, the third antenna panel and the fourth antenna panel are folded on the left side of the satellite body, the seventh antenna panel, the eighth antenna panel, the ninth antenna panel and the tenth antenna panel are folded on the right side of the satellite body, the fifth antenna panel and the sixth antenna panel are folded at the bottom of the satellite body, the first support rod, the second support rod, the third support rod and the fourth support rod are close to being folded, the scissors mechanism is fully unfolded, and the scissors space folding unit and the folding mechanism are fully folded.

[0014] Preferably, the first horizontal hinge is connected to the second horizontal hinge through a rotating pair A, the first vertical hinge is connected to the second vertical hinge through a rotating pair B, and when the antenna folding and unfolding mechanism is in an unfolded state, the axes of the rotating pair A and the rotating pair B are perpendicular, the first support rod and the second support rod are connected to the first face disc through a rotating pair D and a rotating pair E respectively, the third support rod and the fourth support rod are connected to the first face disc through a rotating pair I and a rotating pair J respectively, and the axes of the rotating pair D and the rotating pair J are parallel, and the rotating pair E and the axis of the rotating pair I are parallel.

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

[0016] 1. The connection method between the components of the present invention only includes a revolute pair, which has a simple structure and only one degree of freedom. Only one drive needs to be added to realize expansion and folding.

[0017] 2. The antenna folding and unfolding mechanism of the present invention has the advantages of simple structure, high structural rigidity, high stability, etc. It can realize bidirectional folding and unfolding, which is conducive to the folding and unfolding of planar antennas with larger physical caliber and high rigidity.

[0018] 3. The antenna folding and unfolding mechanism of the present invention has a simple and reasonable structure. Four support rods support two flat plates at the same time, and the axes of the four support rods are arranged in a spatially inclined manner. The scissor rods connect the support rods of the two sections, which improves the support stiffness and further enhances the stability of the unfolding structure of the antenna folding and unfolding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the folding and unfolding mechanism of the bidirectional flat antenna of the present invention;

[0020] Figure 2 It is a schematic structural diagram of a scissor-type space folding and unfolding unit in a folding and unfolding mechanism of a bidirectional flat antenna of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the folding mechanism in the folding and unfolding mechanism of the bidirectional flat antenna of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the scissor mechanism in the folding and unfolding mechanism of the bidirectional flat antenna of the present invention;

[0023] Figure 5 It is a partial structural schematic diagram of the folding and unfolding mechanism of the bidirectional flat antenna of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the bidirectional flat antenna of the present invention when the folding and unfolding mechanism is completely folded;

[0025] Figure 7 It is a schematic diagram of the overall structure of the nine-panel bidirectional flat antenna of the present invention when the folding and unfolding mechanism is fully unfolded;

[0026] Figure 8 It is a schematic diagram of the overall structure of the ten-panel bidirectional flat antenna of the present invention when the folding and unfolding mechanism is completely folded.

[0027] Main reference numerals:

[0028] Scissor space folding unit 1, first connection seat 101, second connection seat 102, third connection seat 103, fourth connection seat 104, first support rod 105, second support rod 106, third support rod 107, fourth support rod 108, first flower disc 109, second flower disc 110, first scissor rod 111, second scissor rod 112, antenna panel 2, first antenna panel 21, second antenna panel 22, third antenna panel 23, fourth antenna panel 24, fifth antenna panel 25 Line panel 25, sixth antenna panel 26, seventh antenna panel 27, eighth antenna panel 28, ninth antenna panel 29, tenth antenna panel 210, satellite body 3, folding mechanism 4, first folding rod 41, second folding rod 42, third folding rod 43, fourth folding rod 44, synchronization rod 45, hinge assembly 5, first hinge 51, first horizontal hinge 511, second horizontal hinge 512, second hinge 52, first vertical hinge 521, second vertical hinge 522. DETAILED DESCRIPTION

[0029] In order to fully describe the technical content, structural features, objectives and effects of the present invention, the following will be described in detail with reference to the accompanying drawings.

[0030] The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit provided by the present invention is as follows: Figure 1As shown, it includes a scissor-shaped space folding and unfolding unit 1, an antenna panel 2, a satellite body 3, a folding mechanism 4 and a hinge assembly 5. The satellite body 3 is located above the center of the antenna panel 2. The panels on the front and rear sides of the satellite body 3 in the antenna panel 2 are connected to the satellite body 3 through the folding mechanism 4. The panels on the left and right sides of the satellite body 3 in the antenna panel 2 are connected through the scissor-shaped space folding and unfolding unit 1, and adjacent panels are connected through the hinge assembly 5. The antenna panel 2 includes a first antenna panel 21, a second antenna panel 22, a third antenna panel 23, a fourth antenna panel 24, a fifth antenna panel 25, a sixth antenna panel 26, a seventh antenna panel 27, an eighth antenna panel 28 and a ninth antenna panel 29. Each panel is arranged in a square shape. The fifth antenna panel 25 is fixedly installed directly below the satellite body 3. The sixth antenna panel 26 and the fourth antenna panel 24 are fixedly installed directly below the satellite body 3. The satellite body 3 is symmetrically arranged on the front and rear sides, the second antenna panel 22 and the eighth antenna panel 28 are symmetrically arranged on the left and right sides of the satellite body 3, the second antenna panel 22, the fourth antenna panel 24, the sixth antenna panel 26 and the eighth antenna panel 28 are respectively rotatably connected to the fifth antenna panel 25 through the first hinge 51, the first antenna panel 21 is connected to the second antenna panel 22 through the scissors-type space folding and unfolding unit 1, the seventh antenna panel 27 is connected to the eighth antenna panel 28 through the scissors-type space folding and unfolding unit 1, and the adjacent edges of the first antenna panel 21 and the second antenna panel 22 are rotatably connected through the second hinge 52, the adjacent edges of the seventh antenna panel 27 and the eighth antenna panel 28 are rotatably connected through the second hinge 52, the fourth antenna panel 24 and the sixth antenna panel 26 are respectively connected to the satellite body 3 through the folding mechanism 4, the first antenna panel 21 and the second antenna panel 22, the second antenna panel 22 and the third antenna panel 23, the seventh antenna panel 27 and the eighth antenna panel 28, and the eighth antenna panel 28 and the ninth antenna panel 29 are all connected through the scissors-type space folding and unfolding unit 1.

[0031] like Figure 2As shown, the scissor-fork space folding unit 1 includes a first connecting seat 101, a second connecting seat 102, a third connecting seat 103, a fourth connecting seat 104, a first support rod 105, a second support rod 106, a third support rod 107, a fourth support rod 108, a first flower disc 109, a second flower disc 110, a first scissor rod 111 and a second scissor rod 112, the first connecting seat 101 and the third connecting seat 103 are fixedly mounted on the first antenna panel 21, the second connecting seat 102 and the fourth connecting seat 104 are fixedly mounted on the second antenna panel 22, and The first connecting seat 101 and the second connecting seat 102, the third connecting seat 103 and the fourth connecting seat 104 are symmetrically arranged, the first end of the first support rod 105 is connected to the first connecting seat 101, the first end of the second support rod 106 is connected to the second connecting seat 102, the second end of the first support rod 105 is connected to the first end of the first flower disc 109, the second end of the second support rod 106 is connected to the second end of the first flower disc 109, the first end of the third support rod 107 is connected to the third connecting seat 103, the second end of the third support rod 107 is connected to the first end of the second flower disc 110, the first end of the fourth support rod 108 is connected to the fourth connecting seat 104, the second end of the fourth support rod 108 is connected to the second end of the second flower disc 110, and the third end of the first flower disc 109 is connected to the third end of the second flower disc 110 through a scissors mechanism. The first support rod 105 and the second support rod 106 are connected to the first faceplate 109 through the rotation pair I and the rotation pair J respectively, the third support rod 107 and the fourth support rod 108 are connected to the second faceplate 110 through the rotation pair D and the rotation pair E respectively, and the axis of the rotation pair D is parallel to the axis of the rotation pair J, and the axis of the rotation pair E is parallel to the axis of the rotation pair I.

[0032] like Figure 3 As shown, the folding mechanism 4 includes a first folding rod 41, a second folding rod 42, a third folding rod 43 and a fourth folding rod 44. The fourth antenna panel 24 and the sixth antenna panel 26 located on the front and rear sides of the satellite body 3 are respectively connected to the first end of the second folding rod 42 through a connecting seat, the first end of the first folding rod 41 is connected to the second end of the second folding rod 42, the second end of the first folding rod 41 is connected to the first end of the third folding rod 43, the second end of the third folding rod 43 is connected to the first end of the fourth folding rod 44, the second end of the fourth folding rod 44 is connected to the satellite body 3 through the connecting seat, and the third end of the first folding rod 41 is connected to the satellite body 3 through the connecting seat.

[0033] like Figure 4 and Figure 5As shown, the scissors mechanism includes a first scissors rod 111 and a second scissors rod 112, and the six first scissors rods 111 and the second scissors rods 112 are connected in sequence through a rotating pair, the first connecting seat 101 on the first antenna panel 21 is connected to the first support rod 105 through a rotating pair F, and there is a certain angle between the axis of the rotating pair F and the axis of the rotating pair D, the second support rod 106 is connected to the second antenna panel 22 through the second connecting seat 12, and the second support rod 106 is connected to the second connecting seat 12 through a rotating pair, and the connecting seat on the antenna panel is rotationally connected to the support rod.

[0034] like Figure 6 As shown, the nine-panel antenna folding and unfolding mechanism is in a folded state, and each panel in the antenna panel 2 is folded on the left and right sides and the bottom of the satellite body 3 respectively, the first antenna panel 21, the second antenna panel 22 and the third antenna panel 23 are folded on the left side of the satellite body 3, the seventh antenna panel 27, the eighth antenna panel 28 and the ninth antenna panel 29 are folded on the right side of the satellite body 3, the fourth antenna panel 24, the fifth antenna panel 25 and the sixth antenna panel 26 are folded at the bottom of the satellite body 3, the first support rod 105, the second support rod 106, the third support rod 107 and the fourth support rod 108 are close to being folded, the scissors mechanism is fully unfolded, and the scissors space folding and unfolding unit 1 and the folding mechanism 4 are fully folded.

[0035] like Figure 7As shown, in the ten-panel antenna folding and unfolding mechanism, the antenna panels 2 are arranged in two rows, and five panels are arranged in each row. The satellite body 3 is fixedly installed directly above the fifth antenna panel 25. The panels located on the left and right sides of the satellite body 3 are connected through the scissor-shaped space folding and unfolding unit 1. The sixth antenna panel 26 located on the front side of the satellite body 3 is connected to the satellite body 3 through the folding mechanism 4. The first antenna panel 21 and the second antenna panel 22, and the seventh antenna panel 27 and the eighth antenna panel 28 are respectively connected through the scissor-shaped space folding and unfolding unit 1, and the scissor-shaped space folding and unfolding unit 1 is connected to the satellite body 3 through the synchronization rod 45. The second antenna panel 22 and the seventh antenna panel 27 are respectively connected to the fifth antenna panel 25 through the first hinge 51. The hinge assembly 5 comprises a first hinge 51 and a second hinge 52, wherein the first hinge 51 comprises a first horizontal hinge 511 and a second horizontal hinge 512, wherein the first horizontal hinge 511 is connected to the second horizontal hinge 512 through a rotating pair G, and the second hinge 52 comprises a first vertical hinge 521 and a second vertical hinge 522, wherein the first vertical hinge 521 is connected to the second vertical hinge 522 through a rotating pair H, and when the antenna folding and unfolding mechanism is in the unfolded state, the axes of the rotating pair G and the rotating pair H are perpendicular.

[0036] like Figure 8 As shown, the ten-panel antenna folding and unfolding mechanism is in a folded state, and each panel in the antenna panel 2 is folded on the left and right sides and the bottom of the satellite body 3 respectively, the first antenna panel 21, the second antenna panel 22, the third antenna panel 23 and the fourth antenna panel 24 are folded on the left side of the satellite body 3, the seventh antenna panel 27, the eighth antenna panel 28, the ninth antenna panel 29 and the tenth antenna panel 210 are folded on the right side of the satellite body 3, the fifth antenna panel 25 and the sixth antenna panel 26 are folded at the bottom of the satellite body 3, the first support rod 105, the second support rod 106, the third support rod 107 and the fourth support rod 108 are close to being folded, the scissors mechanism is fully unfolded, and the scissors space folding and unfolding unit 1 and the folding mechanism 4 are fully folded.

[0037] The following is a further description of a bidirectional flat antenna folding and unfolding mechanism based on a scissor-type space folding and unfolding unit of the present invention in combination with an embodiment:

[0038] When the present invention is used to complete the space folding and unfolding task, it is necessary to ensure that the scissor-type space folding and unfolding unit 1, the antenna panel 2, the satellite body 3, the folding mechanism 4 and the hinge assembly 5 are well installed, reasonably arranged and run smoothly.

[0039] Embodiment 1:

[0040] In this embodiment, the nine antenna panels of the nine-panel antenna folding and unfolding mechanism are arranged in three rows. Figure 1 As shown in Figure 2, the first antenna panel 21, the second antenna panel 22, and the third antenna panel 23 constitute a first unit, the fourth antenna panel 24, the fifth antenna panel 25, and the sixth antenna panel 26 constitute a second unit, the seventh antenna panel 27, the eighth antenna panel 28, and the ninth antenna panel 29 constitute a third unit, and the satellite body 3 is located above the fifth antenna panel 25 and is fixedly connected thereto. The first unit and the third unit located on the left and right sides of the satellite body 3 have the same structure, and are both composed of two vertical scissor-shaped space folding units 1 sharing the same adjacent antenna panel. The fourth antenna panel 24 and the sixth antenna panel 26 in the second unit are distributed on the front and rear sides of the satellite body 3, and are respectively connected to the satellite body 3 through the folding mechanism 4.

[0041] The outer sides of the connection between the first antenna panel 21 and the second antenna panel 22 in the first unit are connected by a second hinge 52, the reflecting surface of the connection between the second antenna panel 22 and the third antenna panel 23 is connected by a first hinge 51, the outer sides of the connection between the seventh antenna panel 27 and the eighth antenna panel 28 in the third unit are connected by a second hinge 52, and the eighth antenna panel 28 and the ninth antenna panel 29 are connected by a first hinge 51; the fourth antenna panel 24 and the fifth antenna panel 25 in the second unit and the fifth antenna panel 25 The first unit and the second unit are connected to the sixth antenna panel 27 through the first hinge 51; the first unit and the second unit are connected through the first hinge 51 between the second antenna panel 22 and the fifth antenna panel 25, and the second unit and the third unit are connected through the first hinge 51 between the fifth antenna panel 25 and the eighth antenna panel 28; the first hinge 51 includes a first horizontal hinge 511 and a second horizontal hinge 512, the first horizontal hinge 511 and the second horizontal hinge 512 are respectively fixedly connected to the plane of the folding direction of the antenna panel 2, and the protruding connecting seats of the first horizontal hinge 511 and the second horizontal hinge 512 are connected through a rotating pair, and the axis of the rotating pair is parallel to the adjacent edge of the antenna panel 2; the second hinge 52 includes a first vertical hinge 521 and a second vertical hinge 522, the first vertical hinge 521 and the second vertical hinge 522 are fixedly connected to the outer side surfaces of the two antenna panels, the first vertical hinge 521 is connected to the second vertical hinge 522 through a rotating pair, and the axis of the rotating pair is parallel to the adjacent edge of the antenna panel 2.

[0042] The folding mechanism 4 provided in this embodiment includes a first folding rod 41, a second folding rod 42, a third folding rod 43 and a fourth folding rod 44, and the lengths of the four folding rods are different. The satellite body 3 and the fourth antenna panel 24 are connected through the first folding rod 41 and the second folding rod 42. The first end of the first folding rod 41 is connected to the connecting seat on the satellite body 3 through a rotating pair, the second end of the first folding rod 41 is connected to the first end of the second folding rod 42 through a rotating pair, and the second end of the second folding rod 42 is connected to the connecting seat on the fourth antenna panel 24 through a rotating pair, and all the rotating pair axes are perpendicular to the folding rod axes; the rod body of the first folding rod 41 is connected to the satellite body 3 through the third folding rod 43 and the fourth folding rod 44, the first end of the fourth folding rod 44 is connected to the connecting seat on the satellite body 3 through a rotating pair, and the fourth folding rod 44 is connected to the connecting seat on the satellite body 3 through a rotating pair. The second end of the third folding rod 43 is connected to the first end of the third folding rod 43 through a rotating pair, and the second end of the third folding rod 43 is connected to the rod body of the first folding rod 41 through a rotating pair, and all the rotating pair axes are perpendicular to the folding rod axis; when the nine-panel antenna folding and unfolding mechanism is fully unfolded, the third folding rod 43 and the fourth folding rod 44 are in a fully unfolded state, which plays a supporting and limiting role on the folding mechanism 4.

[0043] Embodiment 2:

[0044] In this embodiment, the ten antenna panels of the nine-panel antenna folding and unfolding mechanism are arranged in two rows, such as Figure 8 As shown, the satellite body 3 is located on the fifth antenna panel 25 of the first row and is fixedly connected thereto; the ten-panel antenna folding and unfolding mechanisms are respectively unfolded in the horizontal and vertical directions, and the horizontal support mechanism includes two horizontal scissor-shaped space folding and unfolding units 1, which are symmetrically distributed on both sides of the satellite body 3, and the horizontal scissor-shaped space folding and unfolding units 1 on both sides are respectively connected to the satellite body 3 through two synchronization rods 45; the vertical support mechanism includes four vertical scissor-shaped space folding and unfolding units 1 and a folding mechanism 4 connecting the sixth antenna panel 26 to the satellite body 3. The two ends of the outer side of the sixth antenna panel 26 are respectively connected to the outer ends of the fourth antenna panel 24 and the tenth antenna panel 210 through the second hinge 52, and the other antenna panels are connected through the first hinge 51.

[0045] The synchronization rod 45 includes two connecting rods of unequal lengths, and the two connecting rods are connected by a rotating pair. The end of the first connecting rod is connected to the first disc 109 through a rotating pair, and the axis of the rotating pair is perpendicular to the axis of the connecting rod. The end of the second connecting rod is connected to the sliding rod on the satellite body 3 through a cylindrical pair. The axis of the rotating pair in the cylindrical pair is perpendicular to the axis of the connecting rod, and the axis of the movable pair is parallel to the axis of the sliding rod. The sliding rod is fixedly connected to the satellite body 3 through a connecting seat on the satellite body 3.

[0046] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A bidirectional flat antenna folding and unfolding mechanism based on a scissor-type space folding and unfolding unit, characterized in that: It includes a scissor-shaped space folding unit, an antenna panel, a satellite body, a folding mechanism and a hinge assembly. The scissor-type space folding unit includes a first connecting seat, a second connecting seat, a third connecting seat, a fourth connecting seat, a first support rod, a second support rod, a third support rod, a fourth support rod, a first faceplate, a second faceplate, a first scissor-type rod and a second scissor-type rod. The first connecting seat and the third connecting seat are fixedly mounted on the first antenna panel, the second connecting seat and the fourth connecting seat are fixedly mounted on the second antenna panel, and the first connecting seat and the second connecting seat, the third connecting seat and the fourth connecting seat are symmetrically arranged. The first end of the first support rod is connected to the first connecting seat, the first end of the second support rod is connected to the second connecting seat, the second end of the first support rod is connected to the first end of the first faceplate, and the second support rod The second end of the first faceplate is connected to the second end of the first faceplate, the first end of the third support rod is connected to the third connecting seat, the second end of the third support rod is connected to the first end of the second faceplate, the first end of the fourth support rod is connected to the fourth connecting seat, the second end of the fourth support rod is connected to the second end of the second faceplate, the third end of the first faceplate is connected to the third end of the second faceplate through a scissor mechanism, the first support rod and the second support rod are connected to the first faceplate through a rotating pair I and a rotating pair J respectively, the third support rod and the fourth support rod are connected to the second faceplate through a rotating pair D and a rotating pair E respectively, and the axis of the rotating pair D is parallel to the axis of the rotating pair J, and the rotating pair E is parallel to the axis of the rotating pair I; The antenna panel includes a first antenna panel, a second antenna panel, a third antenna panel, a fourth antenna panel, a fifth antenna panel, a sixth antenna panel, a seventh antenna panel, an eighth antenna panel and a ninth antenna panel, each panel is arranged in a square shape, the fifth antenna panel is fixedly installed directly below the satellite body, the sixth antenna panel and the fourth antenna panel are symmetrically arranged on the front and rear sides of the satellite body, the second antenna panel and the eighth antenna panel are symmetrically arranged on the left and right sides of the satellite body, the second antenna panel, the fourth antenna panel, the sixth antenna panel and the eighth antenna panel are respectively rotatably connected to the fifth antenna panel through a first hinge, and the first antenna panel The panel is connected to the second antenna panel through a scissor-fork space folding and unfolding unit, the seventh antenna panel is connected to the eighth antenna panel through a scissor-fork space folding and unfolding unit, and the adjacent edges of the first antenna panel and the second antenna panel are rotatably connected through a second hinge, the seventh antenna panel is rotatably connected to the eighth antenna panel through a second hinge, the fourth antenna panel and the sixth antenna panel are respectively connected to the satellite body through a folding mechanism, and the first antenna panel and the second antenna panel, the second antenna panel and the third antenna panel, the seventh antenna panel and the eighth antenna panel, and the eighth antenna panel and the ninth antenna panel are all connected through a scissor-fork space folding and unfolding unit; The satellite body is located directly above the center of the antenna panel, the panels of the antenna panel located on the front and rear sides of the satellite body are connected to the satellite body through a folding mechanism, the panels of the antenna panel located on the left and right sides of the satellite body are connected through the scissor space folding unit, and adjacent panels are connected through the hinge assembly; The hinge assembly includes a first hinge and a second hinge, the first hinge includes a first horizontal hinge and a second horizontal hinge, the first horizontal hinge is connected to the second horizontal hinge via a rotating pair G, the second hinge includes a first vertical hinge and a second vertical hinge, the first vertical hinge is connected to the second vertical hinge via a rotating pair H, and when the antenna folding and unfolding mechanism is in an unfolded state, the axes of the rotating pair G and the rotating pair H are perpendicular.

2. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: The folding mechanism includes a first folding rod, a second folding rod, a third folding rod and a fourth folding rod. The fourth antenna panel and the sixth antenna panel located on the front and rear sides of the satellite body are respectively connected to the first end of the second folding rod through a connecting seat, the first end of the first folding rod is connected to the second end of the second folding rod, the second end of the first folding rod is connected to the first end of the third folding rod, the second end of the third folding rod is connected to the first end of the fourth folding rod, the second end of the fourth folding rod is connected to the satellite body through a connecting seat, and the third end of the first folding rod is connected to the satellite body through a connecting seat.

3. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: The scissors mechanism includes a first scissors rod and a second scissors rod. The six first scissors rods and the second scissors rods are connected in sequence through a rotating pair. The first connecting seat on the first antenna panel is connected to the first support rod through a rotating pair F, and there is a certain angle between the axis of the rotating pair F and the axis of the rotating pair D. The second support rod is connected to the second antenna panel through a second connecting seat, and the second support rod is connected to the second connecting seat through a rotating pair. The connecting seat on the antenna panel is rotatably connected to the support rod.

4. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: The nine-panel antenna folding and unfolding mechanism is in a folded state, and each panel of the antenna panels is folded on the left and right sides and the bottom of the satellite body respectively, the first antenna panel, the second antenna panel and the third antenna panel are folded on the left side of the satellite body, the seventh antenna panel, the eighth antenna panel and the ninth antenna panel are folded on the right side of the satellite body, the fourth antenna panel, the fifth antenna panel and the sixth antenna panel are folded at the bottom of the satellite body, the first support rod, the second support rod, the third support rod and the fourth support rod are close to and folded, the scissors mechanism is fully unfolded, and the scissors space folding unit and the folding mechanism are fully folded.

5. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: Ten-panel antenna folding and unfolding mechanism: The antenna panels in the antenna folding and unfolding mechanism are arranged in two rows, and five panels are set in each row. The satellite body is fixedly installed directly above the fifth antenna panel. The panels located on the left and right sides of the satellite body are connected through the scissor space folding and unfolding unit. The sixth antenna panel located on the front side of the satellite body is connected to the satellite body through a folding mechanism. The first antenna panel and the second antenna panel, the seventh antenna panel and the eighth antenna panel are respectively connected through the scissor space folding and unfolding unit, and the scissor space folding and unfolding unit is connected to the satellite body through a synchronization rod. The second antenna panel and the seventh antenna panel are respectively connected to the fifth antenna panel through a first hinge, and the first hinge is installed horizontally. The third antenna panel is connected to the fourth antenna panel through a first hinge, and the ninth antenna panel is connected to the tenth antenna panel through a first hinge. The fourth antenna panel and the sixth antenna panel, and the sixth antenna panel and the tenth antenna panel are respectively connected to the fifth antenna panel through a second hinge, and the second hinge is installed vertically.

6. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: The ten-panel antenna folding and unfolding mechanism is in a folded state, and each panel of the antenna panels is folded on the left and right sides and the bottom of the satellite body respectively, the first antenna panel, the second antenna panel, the third antenna panel and the fourth antenna panel are folded on the left side of the satellite body, the seventh antenna panel, the eighth antenna panel, the ninth antenna panel and the tenth antenna panel are folded on the right side of the satellite body, the fifth antenna panel and the sixth antenna panel are folded at the bottom of the satellite body, the first support rod, the second support rod, the third support rod and the fourth support rod are close to and folded, the scissors mechanism is fully unfolded, and the scissors space folding unit and the folding mechanism are fully folded.

7. The bidirectional flat antenna folding and unfolding mechanism based on the scissor-type space folding and unfolding unit according to claim 1, characterized in that: The first horizontal hinge is connected to the second horizontal hinge through a rotating pair A, the first vertical hinge is connected to the second vertical hinge through a rotating pair B, and when the antenna folding and unfolding mechanism is unfolded, the axes of the rotating pair A and the rotating pair B are perpendicular, the first support rod and the second support rod are connected to the first faceplate through a rotating pair D and a rotating pair E respectively, the third support rod and the fourth support rod are connected to the first faceplate through a rotating pair I and a rotating pair J respectively, the axes of the rotating pair D and the rotating pair J are parallel, and the rotating pair E is parallel to the axis of the rotating pair I.

Images