CN114069189A - Rectangular pyramid deployable unit and parabolic deployable antenna mechanism composed of same - Google Patents
Rectangular pyramid deployable unit and parabolic deployable antenna mechanism composed of same Download PDFInfo
- Publication number
- CN114069189A CN114069189A CN202111353495.2A CN202111353495A CN114069189A CN 114069189 A CN114069189 A CN 114069189A CN 202111353495 A CN202111353495 A CN 202111353495A CN 114069189 A CN114069189 A CN 114069189A
- Authority
- CN
- China
- Prior art keywords
- deployable
- rectangular pyramid
- connecting rod
- disc
- revolute pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/288—Satellite antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
- H01Q15/161—Collapsible reflectors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- Aviation & Aerospace Engineering (AREA)
- Toys (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a rectangular pyramid deployable unit and a parabolic deployable antenna mechanism composed of the rectangular pyramid deployable unit, wherein the rectangular pyramid deployable unit comprises a bottom flower disc, a top flower disc a, a top flower disc b, two identical top flower discs c, four web members, four synchronizing rods a and four synchronizing rods b; the lower surfaces of the top flower disc a, the top flower disc b and the top flower disc c are provided with annular grooves; the semicircular earrings at one ends of the web members are connected to the shaft holes of the annular grooves of the bottom face disc in a staggered and rotating mode through the revolute pairs, and the semicircular earrings at the other ends of the web members are connected to the shaft holes of the annular grooves of the lower face of one top face disc a, the shaft holes of the annular grooves of the lower face of one top face disc b and the shaft holes of the annular grooves of the lower face of two identical top face discs c through the revolute pairs respectively. The invention adopts a plurality of rod pieces to combine the deployable antenna mechanism, effectively realizes two motion states of complete deployment and furling, has high furling rate and lighter weight, is convenient for space transportation and saves load.
Description
Technical Field
The invention belongs to the technical field of deployable antenna mechanisms, and particularly relates to a rectangular pyramid deployable unit and a paraboloid deployable antenna mechanism formed by the same.
Background
At present, the competition of various countries in the aerospace field is more and more intense, and in order to safely and efficiently transport various mechanical devices to the space so as to further develop scientific research, the demand of space developable mechanisms is a necessary trend for future development. The space extensible unit is easy to unfold and fold, convenient to transport, simple and convenient to install, light in weight and the like, and has important research significance in the fields of important space projects such as space orbit construction and satellite communication.
With the rapid development of space technology, higher requirements are put forward on high precision, large caliber and light weight, and the deployable mechanism has a plurality of basic units which can realize the adjustment and flexible transformation of the antenna volume by different combination modes, numbers and sizes. The deployable mechanism represented by the rectangular pyramid deployable units and the paraboloid deployable antenna mechanism formed by the rectangular pyramid deployable units has a truss structure, so that the rigidity of the whole mechanism can be effectively improved, the adverse effect caused by deformation is reduced, and the space deployable antenna mechanism becomes safer, more efficient and more convenient in the working process.
In the field of deployable antenna research, various solutions have been provided by the inventors. For example, the chinese patent application "a high folding-unfolding ratio double-layer circular deployable antenna mechanism based on a straight quadrangular prism unit" (patent application No. CN 201910984462.4) discloses a deployable antenna mechanism, which includes a plurality of identical straight quadrangular prism units, each of which is fixedly connected by four connecting rods through upper and lower two layers of deployable modules in mirror symmetry, and a plurality of adjacent straight quadrangular prism units are networked. The deployable antenna mechanism can realize high-efficiency folding and unfolding of the double-layer loop antenna, but does not form a parabolic reflecting surface after unfolding.
For another example, chinese patent application "scissors type hexagonal prism deployable unit and spatial deployable mechanism formed by the same" (patent application No. CN 201710499274.3) also discloses a deployable antenna mechanism, which includes twelve flower discs, six sets of scissors folding rods and twelve sets of folding links, wherein one set of folding links limits the deployment degree of the basic deployable unit by virtue of the length of the links, and the remaining eleven sets of folding links are over-constrained folding links.
Disclosure of Invention
In view of the above problems in the prior art, a rectangular pyramid deployable unit and a parabolic deployable antenna mechanism formed by the rectangular pyramid deployable unit are provided, which enable devices such as a satellite antenna and the like to have better safety and folding and unfolding efficiency when working in space, and ensure that an antenna mechanism forms a stable parabolic reflecting surface after being unfolded, thereby ensuring stable signal reflection and transmission.
The purpose of the invention is realized as follows: the rectangular pyramid deployable unit is characterized by comprising a bottom flower disc, a top flower disc a, a top flower disc b, two identical top flower discs c, four web members, four synchronizing rods a and four synchronizing rods b;
the lower surfaces of the top flower disc a, the top flower disc b and the top flower disc c are provided with annular grooves, and shaft holes are formed in the annular grooves and used for connecting the web members;
the upper surface of the bottom faceplate is provided with an annular groove, and four shaft holes are circumferentially arranged in the annular groove;
the two ends of the four web members are respectively provided with a semicircular earring, one semicircular earring at one end of each web member is connected to the shaft hole of the annular groove of the bottom disc chuck in a staggered and rotating mode through a revolute pair, and the other semicircular earrings at the other ends of the four web members are respectively connected to the shaft hole of the annular groove of the lower surface of one top disc chuck a, the shaft hole of the annular groove of the lower surface of one top disc chuck b and the shaft holes of the annular grooves of the lower surfaces of two identical top disc chucks c through revolute pairs;
the outer side of the circumference of the top flower disc a is connected with a synchronizing rod a and a synchronizing rod b through revolute pairs respectively, and the top flower disc a is connected with a driving mechanism of a motorThe central axis of the synchronous rod a and the synchronous rod b is 90 degrees with the central axis of the top flower disc a。Arranging corners;
a synchronizing rod a and a synchronizing rod b are connected between the two identical flower ejecting disks c through a revolute pair, a synchronizing rod a and a synchronizing rod b are connected between the flower ejecting disks c and the flower ejecting disks b through a revolute pair, and a synchronizing rod a and a synchronizing rod b are connected between the flower ejecting disks b and the flower ejecting disks a through revolute pairs;
the four flower-ejecting disks are sequentially connected through revolute pairs between the synchronous rods a and the synchronous rods b, and a rectangular pyramid space structure is integrally formed; the central axis of the revolute pair between the synchronous rod a and the synchronous rod b is perpendicular to the synchronous rod and parallel to the lower surface of the bottom faceplate. By adopting the rectangular pyramid extensible unit, adverse effects caused by deformation can be effectively reduced, and the rigidity of the whole mechanism is improved; when the rectangular pyramid expandable unit is expanded and furled, the top flower disc a, the top flower disc b and the two top flower discs c which are connected by the revolute pair between the synchronizing rod a and the synchronizing rod b are stretched outwards to realize expansion, and are contracted inwards to realize furling; convenient and fast, save time, can not form unnecessary branch structure.
The antenna mechanism is formed by connecting and combining three groups of rectangular pyramid extensible units;
the three groups of rectangular pyramid deployable units share the flower jacking disc c when being connected and combined pairwise;
the central points of the bottom flower discs of the three groups of rectangular pyramid deployable units are positioned in the same plane, and the three points are connected end to end in sequence to form an equilateral triangle; the center points of the upper surfaces of the three groups of rectangular pyramids are also positioned in the same plane to form an equilateral triangle with the same size as the previous equilateral triangle;
the upper surfaces of the top flower discs of the three groups of rectangular pyramid deployable units are inclined in space and mutually combined into a paraboloid, and the upper surfaces of the top flower discs are tangent to the paraboloid;
by applying a driving force at the revolute pair, the folding and unfolding of the deployable antenna mechanism can be achieved.
Two shaft holes are circumferentially arranged in the annular groove on the lower surface of the top disc chuck c, the shaft holes are connected with the semicircular earrings of the two web members through a revolute pair, and the plane of the top disc chuck c and the central axes of the two web members form an inclined included angle;
four square notches are formed in the outer side of the top flower disc c in the circumferential direction, and every two adjacent square notches are 60. Angular disposition, one 120. Angular disposition, two 90. The four notches are connected with the two synchronizing rods a and the two synchronizing rods b through revolute pairs. The three rectangular pyramid extensible units are combined and connected pairwise and share the flower disc c, so that the paraboloid can be formed, and meanwhile, the connection relation among the rod pieces can be reduced; the antenna mechanism is convenient to fold, the space occupancy rate of the whole antenna mechanism can be reduced, and materials are saved.
The bottom flower disc is provided with two square notches along the outer side of the circumferential direction, and the two square notches are 60。The corners are arranged.
The outer sides of the top flower disc a in the circumferential direction are provided with three square notches, and one square notch is smaller in size; the other two square notches have larger size and are 90。The angle is arranged for placing the synchronizing rods a and b of the rectangular pyramid developable unit.
The outer sides of the top flower discs b in the circumferential direction are provided with three square notches, and one square notch is smaller in size; the other two square notches have larger size and are 90。The angle is arranged for placing the synchronizing rods a and b of the rectangular pyramid developable unit.
The deployable antenna mechanism further comprises three top end connecting rods a, three top end connecting rods b, three bottom end connecting rods a and three bottom end connecting rods b;
when the peripheries of two adjacent rectangular pyramid deployable units are combined, a small-size square notch at the excircle of the top flower disc b of the 1 st rectangular pyramid deployable unit is connected with one end of the top connecting rod a through a revolute pair, a small-size square notch at the excircle of the top flower disc a of the 2 nd rectangular pyramid deployable unit is connected with one end of the top connecting rod b through a revolute pair, and the other end of the top connecting rod a is connected with the other end of the top connecting rod b through a revolute pair;
a square notch with a smaller size positioned at the excircle of the top flower disc a of the 1 st rectangular pyramid deployable unit is connected with one end of the top connecting rod b through a revolute pair, a square notch with a smaller size positioned at the excircle of the top flower disc b of the 3 rd rectangular pyramid deployable unit is connected with one end of the top connecting rod a through a revolute pair, and the other end of the top connecting rod b is connected with the other end of the top connecting rod a through a revolute pair;
a square notch with a smaller size positioned at the excircle of the top flower disc a of the 3 rd rectangular pyramid deployable unit is connected with one end of the top connecting rod b through a revolute pair, a square notch with a smaller size positioned at the excircle of the top flower disc b of the 2 nd rectangular pyramid deployable unit is connected with one end of the top connecting rod b through a revolute pair, and the other end of the top connecting rod a is connected with the other end of the top connecting rod b through a revolute pair;
a square notch at the excircle of the bottom faceplate of the 1 st rectangular pyramid expandable unit is connected with one end of a bottom connecting rod a through a revolute pair, a square notch at the excircle of the bottom faceplate of the 2 nd rectangular pyramid expandable unit is connected with one end of a bottom connecting rod b through a revolute pair, and the other end of the bottom connecting rod a is connected with the other end of the bottom connecting rod b through a revolute pair;
a square notch at the excircle of the bottom faceplate of the 1 st rectangular pyramid expandable unit is connected with one end of a bottom connecting rod b through a revolute pair, a square notch at the excircle of the bottom faceplate of the 3 rd rectangular pyramid expandable unit is connected with one end of a bottom connecting rod a through a revolute pair, and the other end of the bottom connecting rod b is connected with the other end of the bottom connecting rod a through a revolute pair;
one square notch at the excircle of the bottom faceplate of the 3 rd rectangular pyramid expandable unit is connected with one end of the bottom connecting rod b through a revolute pair, one square notch at the excircle of the bottom faceplate of the 2 nd rectangular pyramid expandable unit is connected with one end of the bottom connecting rod a through a revolute pair, and the other end of the bottom connecting rod b is connected with the other end of the bottom connecting rod a through a revolute pair. A reasonable driving force is applied through a revolute pair, so that the top flower disc a, the top flower disc b and the 2 top flower discs c connected through the synchronizing rod a and the synchronizing rod b are driven by the driving force to be closed to the central axis of the 2 nd rectangular pyramid extensible unit, and the folding is realized; the size of the square notch is adopted to distinguish the connection relation and the connection position between the square notch and the top flower disc a, the top flower disc b and the 2 top flower discs c which are connected through the square notch and the synchronizing rod a and the synchronizing rod b, so that the condition that the positions of the synchronizing rod a and the synchronizing rod b which are connected with the square notch are not right, the best furling effect cannot be achieved during furling is avoided, and the purpose of saving space cannot be achieved; meanwhile, when the antenna is unfolded, each rectangular pyramid deployable unit cannot reach the maximum paraboloid, and the stability of the deployable antenna mechanism cannot be ensured; the whole rectangular pyramid deployable unit and the paraboloid deployable antenna mechanism formed by the rectangular pyramid deployable unit are combined in a multi-rod combined flower disc mode, and each unit is simple in structure, easy to realize, high in feasibility, light in weight and capable of saving load.
The side length of an equilateral triangle formed by sequentially connecting the end to end of the central point of the bottom flower disc is equal to the sum of the lengths of the top connecting rod a and the top connecting rod b.
Compared with the prior art, the invention has the following advantages:
1. the invention is a rectangular pyramid deployable unit and a parabolic deployable antenna mechanism composed of the rectangular pyramid deployable units, and the parabolic deployable antenna mechanism is combined in a flower disc combined mode by adopting a plurality of rod pieces, and each unit has the advantages of simple structure, easy realization, high feasibility, lighter weight and load saving; the method has a good reference value for reducing energy consumption caused by carrying antenna equipment with large space volume in the field of aerospace.
2. Because the invention adopts the revolute pair to connect mostly, add the driving force in the revolute pair rationally to make every unit move flexibly, can carry on the attitude adjustment well, so as to realize the folding and unfolding of the antenna mechanism, and the volume is smaller under the folding state, facilitate the airship to carry the operation.
3. The invention uses the antenna units with different numbers, sizes and splicing combination modes to ensure that the surface area is easy to adjust, and the paraboloid is easy to form and is suitable for the requirements of any antenna caliber in different occasions.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic diagram of the structure of the rectangular pyramid deployable unit of the present invention.
Fig. 3 is a top view of the rectangular pyramid deployable unit of the present invention.
Fig. 4 is a partial view of the connection relationship between the synchronization rod a and the synchronization rod b according to the present invention.
Fig. 5 is an enlarged view of the invention at a.
FIG. 6 is a schematic view of the structure of the bottom faceplate of the present invention.
Fig. 7 is a schematic structural view of the ceiling disc a of the present invention.
Fig. 8 is a schematic structural view of the ceiling panel b of the present invention.
Fig. 9 is a schematic structural view of the ceiling panel c of the present invention.
Fig. 10 is a schematic view of a semi-closed structure of the parabolic deployable antenna mechanism composed of the rectangular pyramid deployable units according to the present invention.
Fig. 11 is a schematic view of a folded structure of the parabolic deployable antenna mechanism composed of the rectangular pyramid deployable units according to the present invention.
The device comprises a1 st rectangular pyramid expandable unit, a 2 nd rectangular pyramid expandable unit, a 3 rd rectangular pyramid expandable unit, a4 top end connecting rod a, a 5 top end connecting rod b, a6 bottom connecting rod a, a 7 bottom connecting rod b, an 8 bottom faceplate, a9 top faceplate a, a 10 top faceplate b, a 11 top faceplate c, a 12 web member, a13 synchronizing rod a, a 14 synchronizing rod b and a 15 shaft hole.
Detailed Description
Exemplary embodiments, features and aspects of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements.
As shown in fig. 1, 2 and 3, a rectangular pyramid deployable unit and a parabolic deployable antenna mechanism formed by the rectangular pyramid deployable unit are provided, wherein the rectangular pyramid deployable unit is composed of a bottom flower disc 8, a top flower disc a9, a top flower disc b10, two identical top flower discs c11, four web members 12, four synchronizing rods a13 and four synchronizing rods b 14. Crisscross swivelling joint has four web members 12 in the annular groove of bottom flower disc 8 upper surface, and the both ends of four web members 12 all are provided with semi-circular earrings, and the semi-circular earring of one end of four web members 12 is connected to the shaft hole 15 department of bottom flower disc 8 annular groove through the revolute pair, and the semi-circular earring of the other end of four web members 12 is connected to the shaft hole 15 department of the lower surface annular groove of a top flower disc a9, a top flower disc b through the revolute pair respectively10 at the shaft hole 15 of the lower surface annular groove of the two identical face disks c 11. Two groups of notches on the outer side of the circumference of the flower-ejecting disk a9 are respectively connected with a synchronizing rod a13 and a synchronizing rod b14 through revolute pairs, and the central axis of the flower-ejecting disk a9 of the two synchronizing rods a13 and b14 is 90 degrees。The corners are arranged. A synchronizing rod a13 and a synchronizing rod b14 are connected between the two identical top flower discs c11 through a rotating pair, a synchronizing rod a13 and a synchronizing rod b14 are connected between the top flower discs c11 and the top flower discs b10 through a rotating pair, and a synchronizing rod a13 and a synchronizing rod b14 are connected between the top flower discs b10 and the top flower discs a9 through a rotating pair. A top flower disc a9, a top flower disc b10 and 2 top flower discs c11 are connected in sequence through a rotating pair between a synchronizing rod a13 and a synchronizing rod b14, and a rectangular pyramid space structure is integrally formed.
A synchronizing rod a13 and a synchronizing rod b14 are connected between the top flower disc a9 and the top flower disc c11 through a rotating pair, and the central axis of the rotating pair is perpendicular to the synchronizing rods and is parallel to the lower surface of the bottom flower disc 8.
In order to better show the connection mode of the common ceiling c11, the two web members 12, the two synchronizing rods a13 and the two synchronizing rods b14, a partial ceiling shown in fig. 5 is adopted. Two rectangular pyramid deployable units need to share the flower disc c11 when being connected and combined, two shaft holes 15 are arranged along the circumference in the annular groove on the lower surface of the flower disc c11, the shaft holes 15 are connected with the semicircular earrings of the two web members 12 through revolute pairs, and the plane where the flower disc c11 is located and the central axes of the two web members 12 form an inclined included angle. As shown in fig. 9, four sets of notches with large size and arranged at an angle on the outer circle side of the top panel c11 in the circumferential direction are used for placing two synchronizing rods a13 and two synchronizing rods b14, and the four notches are connected with the two synchronizing rods a13 and the two synchronizing rods b14 through revolute pairs.
When the peripheries of two adjacent rectangular pyramid deployable units are combined, a group of small-size square notches at the excircle of the top flower disc b10 of the 1 st rectangular pyramid deployable unit are connected with one end of the top end connecting rod a4 through a revolute pair, a group of small-size square notches at the excircle of the top flower disc a9 of the 2 nd rectangular pyramid deployable unit are connected with one end of the top end connecting rod b5 through a revolute pair, and the other end of the top end connecting rod a4 is connected with the other end of the top end connecting rod b5 through a revolute pair.
A group of small-size square notches at the excircle of the top flower disc a9 of the 1 st rectangular pyramid deployable unit are connected with one end of the top end connecting rod b5 through a revolute pair, a group of small-size square notches at the excircle of the top flower disc b10 of the 3 rd rectangular pyramid deployable unit are connected with one end of the top end connecting rod a4 through a revolute pair, and the other end of the top end connecting rod b5 is connected with the other end of the top end connecting rod a4 through a revolute pair.
A group of small-size square notches at the excircle of the top flower disc a9 of the 3 rd rectangular pyramid deployable unit are connected with one end of the top end connecting rod b5 through a revolute pair, a group of small-size square notches at the excircle of the top flower disc b10 of the 2 nd rectangular pyramid deployable unit are connected with one end of the top end connecting rod b5 through a revolute pair, and the other end of the top end connecting rod a4 is connected with the other end of the top end connecting rod b5 through a revolute pair.
The excircle of the bottom flower disc 8 of the 1 st rectangular pyramid deployable unit is provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod a6 through revolute pairs, and the excircle of the bottom flower disc 8 of the 2 nd rectangular pyramid deployable unit is also provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod b7 through revolute pairs. The other end of the bottom link a6 and the other end of the bottom link b7 are connected through a revolute pair.
The excircle of the bottom flower disc 8 of the 1 st rectangular pyramid deployable unit is provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod b7 through revolute pairs, and the excircle of the bottom flower disc 8 of the 3 rd rectangular pyramid deployable unit is also provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod a6 through revolute pairs. The other end of the bottom link b7 and the other end of the bottom link a6 are connected through a revolute pair.
The outer circle of the 3 rd rectangular pyramid deployable unit bottom flower disc 8 is provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod b7 through revolute pairs, and the outer circle of the 2 nd rectangular pyramid deployable unit bottom flower disc 8 is also provided with a group of square notches with small sizes, and the square notches are connected with one end of the bottom connecting rod a6 through revolute pairs. The other end of the bottom link b7 and the other end of the bottom link a6 are connected through a revolute pair.
The central points of the bottom flower discs of the three groups of rectangular pyramid deployable units are positioned in the same plane, and the three points are sequentially connected end to form an equilateral triangle with the length and the size of the top end connecting rod a4 and the top end connecting rod b 5. The central points of the upper surfaces of the three groups of rectangular pyramids are also positioned in the same plane to form an equilateral triangle with the same size as the previous equilateral triangle.
The upper surfaces of the top flower discs of the three groups of rectangular pyramid deployable units are inclined in space and mutually combined into a paraboloid, and the upper surfaces of the top flower discs are tangent to the paraboloid.
In this example, the bottom faceplate 8 is shown in fig. 6, and the bottom faceplate 8 is provided with two sets of square notches with smaller size at 60 on the outer side in the circumferential direction。Corner arrangements for placing the bottom link a6 and the bottom link b 7. Four shaft holes 15 are circumferentially arranged in the annular groove in the upper surface of the bottom faceplate 8, and the shaft holes 15 are used for placing four web members 12.
Top flower disc a9 as shown in fig. 7, top flower disc a9 all is equipped with three different square notches of group size along the circumferencial direction outside, have a set of less square notch in the square notch, be used for placing top connecting rod b5, two sets of square notch sizes are great and are 90 in addition。And the angle is provided with a synchronizing rod a13 and a synchronizing rod b14 for placing the rectangular pyramid deployable unit. An axle hole 15 is circumferentially arranged in the annular groove on the lower surface of the top face disc a9, and the axle hole 15 is used for placing a web member 12.
The top flower disc b10 is shown in fig. 8, the top flower disc b10 and the top flower disc a9 have the same characteristics, the top flower disc b10 is provided with three groups of square notches with different sizes along the outer side of the circumference direction, a group of smaller square notches are arranged in the square notches and used for placing the top connecting rod a4, and the other two groups of square notches are larger in size and are 90-degree square notches。And the angle is provided with a synchronizing rod a13 and a synchronizing rod b14 for placing the rectangular pyramid deployable unit. A shaft hole 15 is circumferentially arranged in the annular groove on the lower surface of the top flower disc b10, and the shaft hole 15 is used for accommodating a piece of materialA web member 12.
As shown in FIG. 9, the top faceplate c11 has four sets of square notches with larger size at the outer side of the top faceplate c11 along the circumferential direction, and every two adjacent square notches are 60。Angular arrangement, one 120。Angular arrangement, two 90。The corners are arranged. The square notches are used for placing the synchronizing bar a13 and the synchronizing bar b14 of the rectangular pyramid deployable unit. Two shaft holes 15 are circumferentially arranged in the annular groove on the lower surface of the top disc chuck c11, and the shaft holes 15 are used for placing two web members 12.
As shown in fig. 10 and 11, a driving force is reasonably applied to a revolute pair of the rectangular pyramid deployable unit and the parabolic deployable antenna mechanism composed of the rectangular pyramid deployable unit, so as to realize the folding and unfolding motion states of the deployable antenna mechanism, and the rods move close to each other and are folded and contracted, so that the space occupancy rate is reduced.
Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The rectangular pyramid deployable unit is characterized by comprising a bottom flower disc (8), a top flower disc a (9), a top flower disc b (10), two identical top flower discs c (11), four web members (12), four synchronizing rods a (13) and four synchronizing rods b (14);
the lower surfaces of the top flower disc a (9), the top flower disc b (10) and the top flower disc c (11) are provided with annular grooves, and shaft holes (15) are formed in the annular grooves and used for being connected with the web members (12);
an annular groove is formed in the upper surface of the bottom face disc chuck (8), and four shaft holes (15) are circumferentially arranged in the annular groove;
the two ends of the four web members (12) are respectively provided with a semicircular earring, the semicircular earrings at one end of the four web members (12) are connected to the shaft hole (15) of the annular groove of the bottom disc chuck (8) in a staggered and rotating mode through revolute pairs, and the semicircular earrings at the other end of the four web members (12) are respectively connected to the shaft hole (15) of the annular groove on the lower surface of one top disc chuck a (9), the shaft hole (15) of the annular groove on the lower surface of one top disc chuck b (10) and the shaft holes (15) of the annular grooves on the lower surfaces of two identical top disc chucks c (11) through revolute pairs;
the outer side of the circumference of the top flower disc a (9) is respectively connected with a synchronizing rod a (13) and a synchronizing rod b (14) through a revolute pair, and the synchronizing rod a (13) and the synchronizing rod b (14) are arranged in a way that the central axis of the top flower disc a (9) is 90 degrees;
a synchronizing rod a (13) and a synchronizing rod b (14) are connected between the two identical top flower discs c (11) through a revolute pair, a synchronizing rod a (13) and a synchronizing rod b (14) are connected between the top flower discs c (11) and b (10) through a revolute pair, and a synchronizing rod a (13) and a synchronizing rod b (14) are connected between the top flower discs b (10) and a top flower disc a (9) through a revolute pair;
the four flower-ejecting disks are sequentially connected through revolute pairs between the synchronizing rods a (13) and b (14) to integrally form a rectangular pyramid space structure; the central axis of the revolute pair between the synchronizing rod a (13) and the synchronizing rod b (14) is perpendicular to the synchronizing rods and parallel to the lower surface of the bottom faceplate (8).
2. A parabolic deployable antenna mechanism comprising the rectangular pyramid deployable units of claim 1, wherein the antenna mechanism is formed by connecting and combining three groups of rectangular pyramid deployable units;
the three groups of rectangular pyramid deployable units share the top flower disc c (11) when being connected and combined pairwise;
the central points of the bottom flower plates (8) of the three groups of rectangular pyramid deployable units are positioned in the same plane, and the three points are connected end to end in sequence to form an equilateral triangle; the center points of the upper surfaces of the three groups of rectangular pyramids are also positioned in the same plane to form an equilateral triangle with the same size as the previous equilateral triangle;
the upper surfaces of the top flower discs of the three groups of rectangular pyramid deployable units are inclined in space and mutually combined into a paraboloid, and the upper surfaces of the top flower discs are tangent to the paraboloid;
by applying a driving force at the revolute pair, the folding and unfolding of the deployable antenna mechanism can be achieved.
3. The parabolic deployable antenna mechanism composed of rectangular pyramid deployable units according to claim 2, characterized in that two shaft holes (15) are circumferentially arranged in the annular groove on the lower surface of the top flower disc c (11), the shaft holes (15) are connected with the semicircular earrings of the two web members (12) through revolute pairs, and the plane of the top flower disc c (11) forms an inclined included angle with the central axes of the two web members (12);
the top faceplate c (11) is provided with four square notches along the outer side of the circumferential direction, every two adjacent square notches are arranged at an angle of 60 degrees, an angle of 120 degrees and two angles of 90 degrees and are used for placing two synchronizing rods a (13) and two synchronizing rods b (14), and the four notches are connected with the two synchronizing rods a (13) and the two synchronizing rods b (14) through revolute pairs.
4. Parabolic deployable antenna mechanism according to claim 3, characterised in that the bottom disc (8) is provided with two square notches arranged at an angle of 60 ° on the circumferential outer side.
5. The parabolic deployable antenna mechanism composed of rectangular pyramid deployable units according to claim 3, wherein the top flower disc a (9) is provided with three square notches along the outer side in the circumferential direction, and one of the square notches is smaller in size; the other two square notches are larger in size and arranged at an angle of 90 DEG for placing the synchronizing bar a (13) and the synchronizing bar b (14) of the rectangular pyramid developable unit.
6. The parabolic deployable antenna mechanism composed of rectangular pyramid deployable units according to claim 3, wherein the top faceplate b (10) is provided with three square notches along the outer side in the circumferential direction, and one of the square notches is smaller in size; the other two square notches are larger in size and arranged at an angle of 90 DEG for placing the synchronizing bar a (13) and the synchronizing bar b (14) of the rectangular pyramid developable unit.
7. A parabolic deployable antenna mechanism according to any one of claims 2 to 6, characterised in that the deployable antenna mechanism further comprises three top links a (4), three top links b (5), three bottom links a (6), three bottom links b (7);
when the peripheries of two adjacent rectangular pyramid deployable units are combined, a small-size square notch at the excircle of the top flower disc b (10) of the 1 st rectangular pyramid deployable unit (1) is connected with one end of the top connecting rod a (4) through a revolute pair, a small-size square notch at the excircle of the top flower disc a (9) of the 2 nd rectangular pyramid deployable unit (2) is connected with one end of the top connecting rod b (5) through a revolute pair, and the other end of the top connecting rod a (4) is connected with the other end of the top connecting rod b (5) through a revolute pair;
a square notch with a smaller size at the excircle of the top flower disc a (9) of the 1 st rectangular pyramid deployable unit (1) is connected with one end of the top connecting rod b (5) through a revolute pair, a square notch with a smaller size at the excircle of the top flower disc b (10) of the 3 rd rectangular pyramid deployable unit (3) is connected with one end of the top connecting rod a (4) through a revolute pair, and the other end of the top connecting rod b (5) is connected with the other end of the top connecting rod a (4) through a revolute pair;
a square notch with a smaller size at the excircle of the top flower disc a (9) of the 3 rd rectangular pyramid deployable unit (3) is connected with one end of the top connecting rod b (5) through a revolute pair, a square notch with a smaller size at the excircle of the top flower disc b (10) of the 2 nd rectangular pyramid deployable unit (2) is connected with one end of the top connecting rod b (5) through a revolute pair, and the other end of the top connecting rod a (4) is connected with the other end of the top connecting rod b (5) through a revolute pair;
a square notch at the outer circle of the bottom flower disc (8) of the 1 st rectangular pyramid deployable unit (1) is connected with one end of the bottom connecting rod a (6) through a revolute pair, a square notch at the outer circle of the bottom flower disc (8) of the 2 nd rectangular pyramid deployable unit (2) is connected with one end of the bottom connecting rod b (7) through a revolute pair, and the other end of the bottom connecting rod a (6) is connected with the other end of the bottom connecting rod b (7) through a revolute pair;
a square notch at the excircle of the bottom faceplate (8) of the 1 st rectangular pyramid deployable unit is connected with one end of a bottom connecting rod b (7) through a revolute pair, a square notch at the excircle of the bottom faceplate (8) of the 3 rd rectangular pyramid deployable unit (3) is connected with one end of a bottom connecting rod a (6) through a revolute pair, and the other end of the bottom connecting rod b (7) is connected with the other end of the bottom connecting rod a (6) through a revolute pair;
a square notch at the outer circle of the bottom flower disc (8) of the 3 rd rectangular pyramid deployable unit (3) is connected with one end of the bottom connecting rod b (7) through a revolute pair, a square notch at the outer circle of the bottom flower disc (8) of the 2 nd rectangular pyramid deployable unit (2) is connected with one end of the bottom connecting rod a (6) through a revolute pair, and the other end of the bottom connecting rod b (7) is connected with the other end of the bottom connecting rod a (6) through a revolute pair.
8. The parabolic deployable antenna mechanism formed by the rectangular pyramid deployable units according to claim 7, wherein the side length of the equilateral triangle formed by sequentially connecting the central points of the bottom flower discs (8) end to end is equal to the sum of the lengths of the top end connecting rod a (4) and the top end connecting rod b (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111353495.2A CN114069189B (en) | 2021-11-16 | 2021-11-16 | Parabolic expandable antenna mechanism composed of rectangular pyramid expandable units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111353495.2A CN114069189B (en) | 2021-11-16 | 2021-11-16 | Parabolic expandable antenna mechanism composed of rectangular pyramid expandable units |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114069189A true CN114069189A (en) | 2022-02-18 |
| CN114069189B CN114069189B (en) | 2023-09-15 |
Family
ID=80273491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111353495.2A Active CN114069189B (en) | 2021-11-16 | 2021-11-16 | Parabolic expandable antenna mechanism composed of rectangular pyramid expandable units |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114069189B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824727A (en) * | 2022-04-21 | 2022-07-29 | 燕山大学 | Hexagonal frustum table type folding and unfolding unit and folding and unfolding mechanism formed by same |
| CN115101917A (en) * | 2022-06-27 | 2022-09-23 | 江苏科技大学 | Deployable antenna mechanism based on rectangular bottom surface rectangular pyramid and lightweight networking method |
| CN115377643A (en) * | 2022-09-20 | 2022-11-22 | 江苏科技大学 | Deployable antenna mechanism based on heterogeneous pyramid module |
| CN116885454A (en) * | 2023-08-10 | 2023-10-13 | 江苏科技大学 | Method for networking expandable antenna parabolic reflecting surface based on isosceles trapezoid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007096651A (en) * | 2005-09-28 | 2007-04-12 | Alps Electric Co Ltd | Antenna assembly |
| CN107275794A (en) * | 2017-05-05 | 2017-10-20 | 燕山大学 | 9RR 12URU 3URU symmetric forms can open up elementary cell mechanism |
| CN109687091A (en) * | 2019-01-18 | 2019-04-26 | 燕山大学 | Pyramid packing forms annular truss deployable antenna mechanism |
| CN109860972A (en) * | 2018-12-19 | 2019-06-07 | 燕山大学 | A kind of modularization Deployable antenna mechanism based on symmetrical structure tetrahedron assembled unit |
| US20190221944A1 (en) * | 2018-01-12 | 2019-07-18 | Eagle Technology, Llc | Deployable reflector antenna system |
-
2021
- 2021-11-16 CN CN202111353495.2A patent/CN114069189B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007096651A (en) * | 2005-09-28 | 2007-04-12 | Alps Electric Co Ltd | Antenna assembly |
| CN107275794A (en) * | 2017-05-05 | 2017-10-20 | 燕山大学 | 9RR 12URU 3URU symmetric forms can open up elementary cell mechanism |
| US20190221944A1 (en) * | 2018-01-12 | 2019-07-18 | Eagle Technology, Llc | Deployable reflector antenna system |
| CN109860972A (en) * | 2018-12-19 | 2019-06-07 | 燕山大学 | A kind of modularization Deployable antenna mechanism based on symmetrical structure tetrahedron assembled unit |
| CN109687091A (en) * | 2019-01-18 | 2019-04-26 | 燕山大学 | Pyramid packing forms annular truss deployable antenna mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 杨毅;丁希仑: "四棱锥单元平板式可展开收拢机构的运动特性分析", 航空学报, vol. 31, no. 6, pages 1257 - 1265 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114824727A (en) * | 2022-04-21 | 2022-07-29 | 燕山大学 | Hexagonal frustum table type folding and unfolding unit and folding and unfolding mechanism formed by same |
| CN114824727B (en) * | 2022-04-21 | 2023-03-24 | 燕山大学 | Hexagonal frustum table type folding and unfolding unit and folding and unfolding mechanism formed by same |
| CN115101917A (en) * | 2022-06-27 | 2022-09-23 | 江苏科技大学 | Deployable antenna mechanism based on rectangular bottom surface rectangular pyramid and lightweight networking method |
| CN115101917B (en) * | 2022-06-27 | 2023-08-04 | 江苏科技大学 | Expandable antenna mechanism based on rectangular pyramid with rectangular bottom surface and lightweight networking method |
| CN115377643A (en) * | 2022-09-20 | 2022-11-22 | 江苏科技大学 | Deployable antenna mechanism based on heterogeneous pyramid module |
| CN115377643B (en) * | 2022-09-20 | 2024-05-31 | 江苏科技大学 | Expandable antenna mechanism based on heterogeneous pyramid module |
| CN116885454A (en) * | 2023-08-10 | 2023-10-13 | 江苏科技大学 | Method for networking expandable antenna parabolic reflecting surface based on isosceles trapezoid |
| CN116885454B (en) * | 2023-08-10 | 2024-06-11 | 江苏科技大学 | Method for networking expandable antenna parabolic reflecting surface based on isosceles trapezoid |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114069189B (en) | 2023-09-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114069189A (en) | Rectangular pyramid deployable unit and parabolic deployable antenna mechanism composed of same | |
| US7059094B2 (en) | Frame structure | |
| CN107685880B (en) | Expandable combined unit and large-scale space expandable mechanism composed of same | |
| US6618025B2 (en) | Lightweight, compactly deployable support structure with telescoping members | |
| CN107933959B (en) | Six-rod mechanism and expandable module, extension arm and plane expansion truss formed by six-rod mechanism | |
| JP6024061B2 (en) | Large and robust deployable structures and methods for deploying and locking such structures | |
| US6313811B1 (en) | Lightweight, compactly deployable support structure | |
| CN110828964B (en) | Torsion spring driven single-layer regular hexagon conical deployable truss antenna structure | |
| CN106058415A (en) | Scissors type hexagonal-prism-shaped extensible unit and space extensible mechanism formed by the same | |
| CN114024121B (en) | Array type folding and unfolding antenna mechanism based on rectangular pyramid units | |
| US4845511A (en) | Space deployable domed solar concentrator with foldable panels and hinge therefor | |
| US11791568B2 (en) | Bi-directional flat plate foldable unit and bi-directional flat plate foldable antenna mechanism | |
| CN106450647A (en) | Shears-fork type hexagonal-prism extensible unit and space extensible mechanism formed by the same | |
| CN108945523B (en) | Quadrangular prism expandable unit and space expansion mechanism based on same | |
| CN113258249A (en) | On-orbit ultra-large deployable space structure system | |
| US20230344110A1 (en) | Hexagonal frustum deployable unit and deployable mechanism formed by the same | |
| CN113071710B (en) | Method for fitting cylindrical surface based on isosceles trapezoid cross section straight quadrangular mechanism | |
| CN112490616B (en) | Novel solid surface expandable antenna structure | |
| CN115548693A (en) | Parabolic reflector framework extensible antenna mechanism based on asymmetric rectangular pyramid unit | |
| CN111934098A (en) | Annular deployable antenna truss based on bennett mechanism | |
| CN110970701A (en) | Conical single-layer annular truss deployable antenna mechanism driven by torsion spring | |
| CN115101917B (en) | Expandable antenna mechanism based on rectangular pyramid with rectangular bottom surface and lightweight networking method | |
| CN114180101B (en) | Truss type telescopic arm mechanism and planar expandable truss array | |
| CN115000671A (en) | Pyramid shearing and hinging unit mixed array type single-degree-of-freedom double-layer peripheral truss folding and unfolding antenna | |
| CN109659657B (en) | Perimeter truss expandable antenna mechanism based on conical shear fork mechanism unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |