CN111641020B - Deployable mechanism of triangular prism unit modular planar antenna - Google Patents
Deployable mechanism of triangular prism unit modular planar antenna Download PDFInfo
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- CN111641020B CN111641020B CN202010392299.5A CN202010392299A CN111641020B CN 111641020 B CN111641020 B CN 111641020B CN 202010392299 A CN202010392299 A CN 202010392299A CN 111641020 B CN111641020 B CN 111641020B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/10—Telescopic elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses an extensible mechanism of a triangular prism unit modular planar antenna. Existing deployable mechanism units are complex to assemble or are not easily fitted to a work plane. The periphery of a driving module at the central position of the invention is provided with N driving modules which are uniformly distributed along the circumferential direction; the driving module comprises a central connecting block, a spring, a driving slide block, a supporting circular tube, a driving connecting rod, a joint connecting rod and a cylindrical pin; every two adjacent peripheral driving modules are connected through two unfolding chords arranged at intervals, and each peripheral driving module is fixedly connected with the central position driving module through two unfolding chords arranged at intervals. The invention can realize the two-dimensional plane folding of the large-scale antenna, the folding ratio is large, and the rigidity is higher in the unfolded state; the triangular prism expandable mechanism unit is adopted, and the fitting of the working plane is accurate.
Description
Technical Field
The invention belongs to the technical field of aerospace, and relates to a deployable mechanism of a framework type planar antenna, in particular to a deployable mechanism of a triangular prism unit modular planar antenna.
Background
The framework antenna is a novel deployable antenna relative to the rigid reflector antenna or the inflatable reflector antenna. When the rocket is folded, the volume of the antenna can be effectively reduced, and the carrying capacity of the rocket is improved; when the antenna reaches the preset track to realize the unfolding, better structural rigidity can be provided for the antenna. The framework type antenna utilizes the idea of modularization expansion, an antenna supporting structure is built by using a modularization unit mechanism, and the deployable antenna supporting structures with different calibers can be obtained by changing the number and the size of the module units, so the framework type antenna is also called as a modularization antenna. At present, tetrahedron or hexagonal prism expandable structural units are mostly adopted, but the tetrahedron or hexagonal prism expandable structural units respectively have the defects of complex assembly and difficulty in fitting a working plane.
Disclosure of Invention
The invention aims to provide a triangular prism unit modularized plane antenna deployable mechanism which can reduce the antenna assembly difficulty and improve the fitting precision of a working plane compared with a tetrahedral and hexagonal prism deployable mechanism unit.
The invention comprises a driving module, an unfolding chord and a tensioning rope; n driving modules are uniformly distributed along the circumferential direction on the periphery of the driving module at the central position, and N is more than or equal to 6; the driving module comprises a central connecting block, a spring, a driving sliding block, a supporting circular tube, a driving connecting rod, a joint connecting rod and a cylindrical pin; the two ends of the supporting circular tube are both fixed with a central connecting block through cylindrical pins; the two driving sliding blocks and the supporting circular tube form a sliding pair, and each driving sliding block is connected with a central connecting block at the corresponding end position of the supporting circular tube through a spring; the spring is provided with pretension; the central connecting block and the driving sliding block are respectively provided with N hinge positions which are uniformly distributed along the circumferential direction, and the hinge positions on the central connecting block and the driving sliding block are in one-to-one correspondence in the circumferential direction; in the central position driving module, N hinge positions of each central connecting block are respectively hinged with one ends of N joint connecting rods, N hinge positions of each driving sliding block are respectively hinged with one ends of the N driving connecting rods, and the other end of each driving connecting rod at the same end is hinged with the middle part of one joint connecting rod; in the peripheral driving module, three continuous hinge positions of each central connecting block are respectively hinged with one end of each joint connecting rod, three continuous hinge positions of each driving sliding block are respectively hinged with one end of each driving connecting rod, and the other end of each driving connecting rod at the same end is hinged with the middle part of one joint connecting rod corresponding to the circumferential position. The unfolding chord comprises an unfolding round pipe and an elastic hinge; two ends of the elastic hinge are respectively fixed with one end of each of the two unfolding circular pipes; every two adjacent peripheral driving modules are connected through two unfolding chords arranged at intervals, and each peripheral driving module is fixedly connected with the central position driving module through two unfolding chords arranged at intervals. Two of the central connecting blocks at the diagonal positions of every two adjacent peripheral driving modules are connected through a tensioning rope, and each peripheral driving module and two of the central connecting blocks at the diagonal positions of the central driving module are connected through a tensioning rope.
Further, the connection mode of unfolding two ends of the chord and the two driving modules is as follows: the end parts of the two unfolded circular pipes, which are not connected with the elastic hinges, and the two joint connecting rods corresponding to the positions on the two driving modules are respectively fixed through cylindrical pins.
Furthermore, every two adjacent peripheral driving modules, the central position driving module, the three unfolding chords connected with the three driving modules and the three tensioning ropes form a triangular prism extensible mechanism unit.
The invention has the following beneficial effects:
1. the invention can realize the two-dimensional plane folding and unfolding of the large-scale antenna, the folding ratio is large, and the rigidity is higher in the unfolding state; the triangular prism expandable mechanism unit is adopted, and fitting of the supporting plane is accurate.
2. The invention provides driving force by using the spring, realizes the unfolding action by using the crank-slider mechanism, does not need additional power input and has high reliability in the unfolding process.
3. The invention has simple structure principle, the kinematic pairs are all revolute pairs, and the assembly difficulty is low.
4. The invention has structural symmetry, and the deployable mechanisms of the framed planar antenna with different sizes can be formed by changing the number of the triangular prism deployable mechanism units, the length of the deployed chord and the length of the supporting circular tube, so that the deployable mechanisms can be better applied to the planar deployable antenna.
Drawings
FIG. 1 is a perspective view of the present invention in a fully deployed condition;
FIG. 2 is a structural perspective view of the present invention in a fully collapsed condition;
fig. 3 is a structural perspective view of the triangular prism deployable mechanism unit in a fully deployed state in the present invention;
fig. 4 is a structural perspective view of the triangular prism deployable mechanism unit in a completely collapsed state in the present invention;
FIG. 5 is a schematic structural diagram of a driving module according to the present invention;
FIG. 6 is a schematic structural view of an expanding chord of the present invention;
in the figure: 1. the triangular prism deployable mechanism unit comprises 2 parts of a triangular prism deployable mechanism unit, 2 parts of a driving module, 2-1 parts of a spring, 2-2 parts of a driving sliding block, 2-3 parts of a driving connecting rod, 2-4 parts of a joint connecting rod, 2-5 parts of a central connecting block, 2-6 parts of a supporting circular tube, 2-7 parts of a cylindrical pin, 3 parts of a deploying chord, 3-1 parts of a deploying circular tube, 3-2 parts of an elastic hinge, 4 parts of a tensioning rope.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, a triangular prism unit modular planar antenna deployable structure includes a driving module 2, a deployment chord 3, and a tension rope 4; the periphery of the driving module 2 at the central position is provided with N driving modules 2 which are uniformly distributed along the circumferential direction, N is more than or equal to 6, and the value of N in the embodiment is 6.
As shown in fig. 3, 4 and 5, the driving module 2 comprises a central connecting block 2-5, a spring 2-1, a driving slider 2-2, a supporting circular tube 2-6, a driving connecting rod 2-3, a joint connecting rod 2-4 and a cylindrical pin 2-7; two ends of the supporting circular tube 2-6 are both fixed with a central connecting block 2-5 through a cylindrical pin 2-7; the two driving sliding blocks 2-2 and the supporting circular tube 2-6 form a sliding pair, and each driving sliding block 2-2 is connected with the central connecting block 2-5 at the corresponding end position of the supporting circular tube 2-6 through a spring 2-1; the spring 2-1 is provided with pretension; the central connecting block 2-5 and the driving slide block 2-2 are respectively provided with N hinge positions which are uniformly distributed along the circumferential direction, and the hinge positions on the central connecting block 2-5 and the driving slide block 2-2 are in one-to-one correspondence in the circumferential direction; in the central position driving module 2, N hinge positions of each central connecting block 2-5 are respectively hinged with one end of N joint connecting rods 2-4, N hinge positions of each driving sliding block 2-2 are respectively hinged with one end of N driving connecting rods 2-3, and the other end of each driving connecting rod 2-3 at the same end is hinged with the middle part of one joint connecting rod 2-4; in the peripheral driving module 2, three continuous hinge positions of each central connecting block 2-5 are respectively hinged with one end of each of the three joint connecting rods 2-4, three continuous hinge positions of each driving sliding block 2-2 are respectively hinged with one end of each of the three driving connecting rods 2-3, and the other end of each driving connecting rod 2-3 at the same end is hinged with the middle part of one joint connecting rod 2-4 corresponding to the circumferential position.
As shown in fig. 3, 4 and 6, the expanding chord 3 includes an expanding circular tube 3-1 and an elastic hinge 3-2; two ends of the elastic hinge 3-2 are respectively fixed with one end of the two unfolded circular pipes 3-1, so that the included angle of the two unfolded circular pipes 3-1 can be changed.
Every two adjacent peripheral driving modules 2 are connected through two unfolding chords 3 arranged at intervals, and each peripheral driving module 2 is connected with the central position driving module 2 through two unfolding chords 3 arranged at intervals; the connection mode of two ends of the unfolding chord 3 and the two driving modules 2 is as follows: the end parts of the two unfolded circular tubes 3-1 which are not connected with the elastic hinges 3-2 are respectively fixed with two joint connecting rods 2-4 corresponding to the positions of the two driving modules 2 through cylindrical pins 2-7. Two of the central connecting blocks 2-5 at diagonally opposite positions of every two adjacent peripheral drive modules 2 are connected by a tension rope 4, and two of the central connecting blocks 2-5 at diagonally opposite positions of each peripheral drive module 2 and the central drive module 2 are connected by a tension rope 4.
The working principle of the deployable mechanism of the triangular prism unit modular planar antenna is as follows:
when the unfolding is carried out, the spring 2-1 of each driving module 2 pulls the driving slide block 2-2 to the central connecting block 2-5, so that the driving connecting rod 2-3 drives the two unfolding circular tubes 3-1 of the unfolding chord 3 to be unfolded mutually, and the elastic hinge 3-2 also provides partial unfolding driving force; after being completely unfolded, as shown in fig. 1, each tension rope 4 is tensioned, and the triangular prism unit modular planar antenna can be unfolded to be in a static stable structure.
When the foldable frame is folded, the driving sliding blocks 2-2 of the driving modules 2 are pulled away from the central connecting block 2-5, so that the driving connecting rods 2-3 drive the elastic hinges 3-2 of the unfolding chords 3 to bend, two unfolding circular pipes 3-1 of the unfolding chords 3 are close to each other, and the tensioning ropes 4 are loosened; after completely furled, as shown in fig. 2, it can be seen that the unfolding mechanism of the triangular prism unit modular planar antenna has a large folding ratio, which is beneficial to space rocket carrying.
In the deployable mechanism of the triangular prism unit modularized planar antenna, every two adjacent peripheral driving modules 2, a central position driving module 2, three deployment chords 3 and three tensioning ropes which are connected with the three driving modules 2 form a triangular prism deployable mechanism unit 1; therefore, there are N triangular prism deployable mechanism units 1 in total. The framework type planar antenna deployable mechanisms with different sizes can be formed by changing the number of the triangular prism deployable mechanism units, the length of the deployable chord and the length of the supporting circular tube; the triangular prism expandable mechanism unit 1 is adopted, and the working plane is easy to fit. Therefore, the invention can be better applied to the plane deployable antenna.
Claims (2)
1. The utility model provides a but triangular prism unit modularization plane antenna deployment mechanism, includes drive module, expansion chord member and tensioning rope, its characterized in that: n driving modules are uniformly distributed along the circumferential direction on the periphery of the driving module at the central position, and N is more than or equal to 6; the driving module comprises a central connecting block, a spring, a driving sliding block, a supporting circular tube, a driving connecting rod, a joint connecting rod and a cylindrical pin; the two ends of the supporting circular tube are both fixed with a central connecting block through cylindrical pins; the two driving sliding blocks and the supporting circular tube form a sliding pair, and each driving sliding block is connected with a central connecting block at the corresponding end position of the supporting circular tube through a spring; the spring is provided with pretension; the central connecting block and the driving sliding block are respectively provided with N hinge positions which are uniformly distributed along the circumferential direction, and the hinge positions on the central connecting block and the driving sliding block are in one-to-one correspondence in the circumferential direction; in the central position driving module, N hinge positions of each central connecting block are respectively hinged with one ends of N joint connecting rods, N hinge positions of each driving sliding block are respectively hinged with one ends of the N driving connecting rods, and the other end of each driving connecting rod at the same end is hinged with the middle part of one joint connecting rod; in the peripheral driving module, three continuous hinge positions of each central connecting block are respectively hinged with one end of three joint connecting rods, three continuous hinge positions of each driving sliding block are respectively hinged with one end of the three driving connecting rods, and the other end of each driving connecting rod at the same end is hinged with the middle part of one joint connecting rod corresponding to the circumferential position; the unfolding chord comprises an unfolding round pipe and an elastic hinge; two ends of the elastic hinge are respectively fixed with one end of each of the two unfolding circular pipes; each two adjacent peripheral driving modules are connected through two unfolding chords arranged at intervals, and each peripheral driving module is fixedly connected with the central position driving module through two unfolding chords arranged at intervals; two central connecting blocks at the diagonal positions of every two adjacent peripheral driving modules are connected through a tensioning rope, and each peripheral driving module is connected with two central connecting blocks at the diagonal positions of the central driving modules through the tensioning rope;
every two adjacent peripheral driving modules, the central position driving module, the three unfolding chords connected with the three driving modules and the three tensioning ropes form a triangular prism extensible mechanism unit.
2. The triangular prism unit modular planar antenna deployable mechanism of claim 1, wherein: the connection mode of two ends of the unfolding chord and the two driving modules is as follows: the end parts of the two unfolded circular pipes, which are not connected with the elastic hinges, and the two joint connecting rods corresponding to the positions on the two driving modules are respectively fixed through cylindrical pins.
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| CN202010392299.5A CN111641020B (en) | 2020-05-11 | 2020-05-11 | Deployable mechanism of triangular prism unit modular planar antenna |
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| CN202010392299.5A CN111641020B (en) | 2020-05-11 | 2020-05-11 | Deployable mechanism of triangular prism unit modular planar antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112319855A (en) * | 2020-11-06 | 2021-02-05 | 哈尔滨工业大学 | Spatial extensible prism unit for on-orbit assembly |
| CN114256604B (en) * | 2021-12-09 | 2024-04-16 | 上海宇航系统工程研究所 | Parabolic cylinder antenna based on triangular prism foldable unit |
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