A high-precision two-dimensional synchronous deployment mechanism for parabolic reflectors

Abstract

The present invention belongs to the technical field of aerospace folding and unfolding mechanisms, specifically, a high-precision two-dimensional synchronous unfolding mechanism for a parabolic cylindrical reflector. It includes an elbow synchronous unfolding beam, a root unfolding beam, an end unfolding beam, and two parallel parabolic ribs, wherein the parabolic ribs include a root rib, an elbow rib, an end rib, a root hinge, and an elbow hinge, wherein one end of the elbow rib is connected to one end of the root rib through a root hinge, and the other end of the elbow rib is connected to one end of the end rib through an elbow hinge; the root unfolding beam is connected between the ends of the two root ribs, the elbow synchronous unfolding beam is connected between the two elbow hinges, and the end is connected between the ends of the two end ribs through the end unfolding beam, and the elbow synchronous unfolding beam, the root unfolding beam, and the end unfolding beam are synchronously unfolded or folded with the two parabolic ribs. The present invention adopts a modular design, the product is easy to assemble, can be expanded as needed, and can meet large-scale requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of aerospace folding and unfolding mechanisms, in particular to a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector. Background Art

[0002] With the development of aerospace industry, reflector antennas are increasingly widely used. Limited by the volume of rockets, reflector antennas need to remain in a folded state. After entering orbit, it relies on its own power source to unfold to the target state, and needs to meet the high precision and high rigidity requirements during operation. In order to meet the needs of product folding and unfolding, a two-dimensional synchronous unfolding mechanism is used in the parabolic and cylindrical unfolding directions to achieve synchronous unfolding in the parabolic and cylindrical directions. The existing two-dimensional synchronous unfolding mechanism is implemented by a rod system mechanism, which is large in size and heavy in weight, and has high requirements for processing accuracy and assembly process.

[0003] When the reflector is laid with a metal mesh, a large driving force is required at the end of the mechanism to flatten the mesh. In order to solve the problems of driving force loss and structural space layout, a two-dimensional synchronous unfolding mechanism based on rope and gear transmission is urgently needed. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to provide a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector, so as to solve the problem that the existing two-dimensional synchronous unfolding mechanism is large in size and heavy in weight, and has high requirements on processing accuracy and assembly process.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention provides a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector, comprising two parallel-arranged parabolic ribs and a cylindrical unfolding beam connected between the two parabolic ribs, wherein the shapes of the two parabolic ribs are both parabolic;

[0007] The parabolic rib bar comprises a root rib bar, an elbow rib bar, an end rib bar, a root hinge and an elbow hinge, wherein one end of the elbow rib bar is connected to one end of the root rib bar through the root hinge, and the other end of the elbow rib bar is connected to one end of the end rib bar through the elbow hinge; the elbow hinge is connected to the cylindrical unfolding beam to realize the linkage unfolding or folding of the cylindrical unfolding beam and the two parabolic rib bars.

[0008] The elbow hinge comprises an elbow mother hinge A, an elbow mother hinge B, a fixing seat, a hinge driving torsion spring, an elbow hinge rotating pin, a synchronous rope transmission assembly and a synchronous gear transmission assembly, wherein the elbow mother hinge A and the elbow mother hinge B are respectively connected to the elbow rib bar and the end rib bar, the fixing seat is arranged between the elbow mother hinge A and the elbow mother hinge B, the front and rear ends of the fixing seat are respectively rotatably connected to the elbow mother hinge A and the elbow mother hinge B through two elbow hinge rotating pins, each elbow hinge rotating pin is sleeved with a hinge driving torsion spring, one end of the hinge driving torsion spring abuts against the fixing seat, and the other end abuts against the elbow mother hinge A or the elbow mother hinge B;

[0009] The synchronous rope transmission assembly is arranged on the fixed seat and connected with the elbow female hinge A and the elbow female hinge B. The synchronous rope transmission assembly is used for synchronously unfolding or folding the elbow female hinge A and the elbow female hinge B.

[0010] The synchronous gear transmission assembly is arranged on the fixing seat and connected with the cylindrical unfolding beam. The synchronous gear transmission assembly is used for synchronously unfolding or folding the cylindrical unfolding beam and the parabolic rib rod.

[0011] The synchronous rope transmission assembly includes a synchronous rope driving wheel, a synchronous rope, a synchronous rope driven wheel and two synchronous rope transmission idle wheels, wherein the synchronous rope driving wheel and the synchronous rope driven wheel are respectively arranged on the two elbow hinge rotating pins, and the two synchronous rope transmission idle wheels are installed on the fixed seat for vertical rotation, and the synchronous rope is wrapped around the synchronous rope driving wheel, the synchronous rope driven wheel and the two synchronous rope transmission idle wheels.

[0012] The synchronous rope is arranged in an "8" shape near the synchronous rope driven wheel side, so that the rotation directions of the synchronous rope driving wheel and the synchronous rope driven wheel are opposite; a synchronous rope tensioner is provided on the synchronous rope driven wheel, and the synchronous rope is installed on the synchronous rope tensioner, and tensioning is achieved through the synchronous rope tensioner.

[0013] The synchronous gear transmission assembly includes a driven bevel gear and a driving bevel gear, wherein the driving bevel gear is installed on a rotating pin of the elbow hinge, the driven bevel gear is rotatably installed on the side of the fixed seat, and the driven bevel gear is meshed with the driving bevel gear; the driven bevel gear is connected to the cylindrical expansion beam.

[0014] The cylindrical expansion beam comprises an elbow synchronous expansion beam, a root expansion beam and an end expansion beam, wherein the elbow synchronous expansion beam is connected between two elbow hinges, the root expansion beam is connected between the ends of two root ribs, and the end expansion beam is connected between the ends of two end ribs.

[0015] The elbow synchronous deployment beam comprises two elbow beams and an elbow pin hinge connected between the two elbow beams, and the ends of the two elbow beams are respectively connected to the elbow hinges on both sides;

[0016] An elbow beam synchronous deployment component is also connected between the two elbow beams; the elbow beam synchronous deployment component includes an elbow oblique beam, an elbow synchronous deployment gear, an elbow synchronous deployment gear seat and an elbow deployment rotating pin, wherein there are two elbow oblique beams, one end of the two elbow oblique beams are respectively hinged to the two elbow beams, and the other ends of the two elbow oblique beams are respectively fixed with elbow synchronous deployment gears, and the elbow synchronous deployment gears and the elbow synchronous deployment gear seat are hinged through the elbow deployment rotating pin to ensure that the two elbow synchronous deployment gears are meshed with each other.

[0017] The root expansion beam comprises a root expansion beam fixing seat, a root expansion beam rotating pin, a root beam and a root expansion hinge, wherein there are two root beams, the two root beams are connected by a root expansion hinge, the ends of the two root beams are rotationally connected to the two root expansion beam fixing seats respectively through the root expansion beam rotating pin, and the two root expansion beam fixing seats are respectively connected to the root rib rods on both sides.

[0018] The end unfolding beam comprises a plurality of end beams connected in sequence by end pin hinges, and the folding directions of two adjacent end beams are opposite, and the end beams located at the two side ends are hinged to the two end ribs by hinges.

[0019] The length of the root rib is smaller than that of the elbow rib and the end rib; the root hinge and the elbow hinge are finely adjusted in angle according to the posture requirements during assembly to meet the deployment accuracy requirements, and are self-locking in place after being rotated to a specified angle; micro switches are installed on the root hinge and the elbow hinge, which will feedback a signal of being in place after being deployed into place.

[0020] The advantages and positive effects of the present invention are as follows: the high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector provided by the present invention can simplify the deployment process, and reduce the weight of the product while ensuring the motion accuracy compared with the connecting rod mechanism through the combination of the synchronization rope and the gear transmission, thereby achieving the advantages of lightweight, high precision and high rigidity.

[0021] The present invention adopts a synchronous rope and a gear rigid-flexible combined transmission configuration, which reduces the processing accuracy requirement while ensuring high transmission accuracy compared with a rigid structure transmission.

[0022] The present invention adopts modular design, the product is easy to assemble, can be expanded as needed, and can meet large-scale requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an axonometric diagram of the unfolded state of a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector of the present invention;

[0024] Figure 2It is an axonometric diagram of a high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector in a folded state according to the present invention;

[0025] Figure 3 This is a structural schematic diagram of a high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector of the present invention in a folded state with one side of the parabolic rib bar hidden;

[0026] Figure 4 It is a structural schematic diagram of the parabolic rib bar in the present invention;

[0027] Figure 5 is an axonometric view of the elbow hinge of the present invention;

[0028] Figure 6 is a top view of the elbow hinge of the present invention;

[0029] Figure 7 It is a structural schematic diagram of the elbow synchronous deployment beam in the present invention;

[0030] Figure 8 It is a partial schematic diagram of the elbow synchronous deployment beam in the present invention;

[0031] Fig. 9 It is a structural schematic diagram of the root expansion beam in the present invention;

[0032] Fig.10 It is a schematic diagram of the unfolded state of the end unfolded beam in the present invention;

[0033] Fig.11 It is a schematic diagram of the folded state of the end unfolded beam in the present invention.

[0034] In the figure: 1-parabola rib, 11-root rib, 12-elbow rib, 13-end rib, 14-root hinge, 15-elbow hinge, 1501-elbow mother hinge A, 1502-elbow mother hinge B, 1503-synchronous rope driving wheel, 1504-synchronous rope transmission idler wheel, 1505-synchronous rope, 1506-synchronous rope driven wheel, 1507-synchronous rope tensioner, 1508-fixed seat, 1509-driven bevel gear, 1510-driving bevel gear, 1511-hinge driving torsion spring, 1512-elbow hinge swivel pin;

[0035] 2-elbow synchronous unfolding beam, 21-elbow beam, 22-elbow pin hinge, 23-elbow inclined beam, 24-elbow synchronous unfolding gear, 25-elbow synchronous unfolding gear seat, 26-elbow unfolding rotary pin;

[0036] 3-root expansion beam, 31-root expansion beam fixing seat, 32-root expansion beam swivel pin, 33-root beam, 34-root expansion hinge;

[0037] 4-end unfolded beam, 41-end pin hinge, 42-end beam. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] See also Figures 1 to 4 As shown, the present invention provides a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector, comprising two parallel parabolic ribs 1 and a cylindrical unfolding beam connected between the two parabolic ribs 1, wherein the two parabolic ribs 1 are both parabolic in shape; the parabolic rib 1 comprises a root rib 11, an elbow rib 12, an end rib 13, a root hinge 14 and an elbow hinge 15, wherein one end of the elbow rib 12 is connected to one end of the root rib 11 through the root hinge 14, and the other end of the elbow rib 12 is connected to one end of the end rib 13 through the elbow hinge 15; the elbow hinge 15 is connected to the cylindrical unfolding beam to realize the linkage unfolding or folding of the cylindrical unfolding beam and the two parabolic ribs 1.

[0040] See also Figures 1 to 3 As shown, in an embodiment of the present invention, the cylindrical expansion beam includes an elbow synchronous expansion beam 2, a root expansion beam 3 and an end expansion beam 4, wherein the elbow synchronous expansion beam 2 is connected between two elbow hinges 15, the root expansion beam 3 is connected between the ends of two root ribs 11, and the end expansion beam 4 is connected between the ends of two end ribs 13, and the elbow synchronous expansion beam 2, the root expansion beam 3 and the end expansion beam 4 are synchronously expanded or folded with the two parabolic ribs 1. The synchronous expansion is mainly achieved by the elbow synchronous expansion beam 2, and the root expansion beam 3 and the end expansion beam 4 are auxiliary expansion mechanisms. The two parabolic ribs 1 are connected by the root expansion beam 3, the elbow synchronous expansion beam 2 and the end expansion beam 4, and the linkage expansion is achieved by the two-dimensional synchronous expansion mechanism.

[0041] See also Figure 4 As shown, in an embodiment of the present invention, the length of the root rib 11 is less than the length of the elbow rib 12 and the end rib 13. The root hinge 14 and the elbow hinge 15 can be finely adjusted in angle according to the posture requirements during assembly to meet the deployment accuracy requirements, and can be self-locked in place after rotating to a specified angle (such as a pin-locking groove hinge commonly used in the industry). Furthermore, micro switches are installed on the root hinge 14 and the elbow hinge 15, and a signal of being in place will be fed back after being deployed in place. By fine-tuning the deployment angle of the root hinge 14 and the elbow hinge 15, the target parabolic accuracy requirements can be met, and locking in place can be achieved. The angle adjustment method and the locking method of the root hinge 14 and the elbow hinge 15 are common methods in the industry and will not be repeated here.

[0042] See also Figure 5and Figure 6 As shown, in the embodiment of the present invention, the elbow hinge 15 includes an elbow mother hinge A1501, an elbow mother hinge B1502, a fixing seat 1508, a hinge driving torsion spring 1511, an elbow hinge swivel pin 1512, a synchronous rope transmission assembly and a synchronous gear transmission assembly, wherein the elbow mother hinge A1501 and the elbow mother hinge B1502 are fixedly connected to the elbow rib rod 12 and the end rib rod 13 respectively, the fixing seat 1508 is arranged between the elbow mother hinge A1501 and the elbow mother hinge B1502, and the front of the fixing seat 1508 is The rear end is rotatably connected to the elbow mother hinge A1501 and the elbow mother hinge B1502 respectively through two elbow hinge rotating pins 1512. Each elbow hinge rotating pin 1512 is sleeved with a hinge driving torsion spring 1511. One end of the hinge driving torsion spring 1511 abuts against the fixed seat 1508, and the other end abuts against the elbow mother hinge A1501 or the elbow mother hinge B1502. The hinge driving torsion spring 1511 can drive the elbow mother hinge A1501 and the elbow mother hinge B1502 to rotate around the elbow hinge rotating pin 1512. The synchronous rope transmission assembly is arranged on the fixed seat 1508 and is connected to the elbow mother hinge A1501 and the elbow mother hinge B1502. The synchronous rope transmission assembly is used for the synchronous unfolding or folding of the elbow mother hinge A1501 and the elbow mother hinge B1502; the synchronous gear transmission assembly is arranged on the fixed seat 1508 and is connected to the elbow rib rod 12. The synchronous gear transmission assembly is used for the synchronous unfolding or folding of the elbow rib rod 12 and the parabolic rib rod 1.

[0043] In an embodiment of the present invention, the synchronous rope transmission assembly includes a synchronous rope driving wheel 1503, a synchronous rope 1505, a synchronous rope driven wheel 1506 and two synchronous rope transmission idler wheels 1504, wherein the synchronous rope driving wheel 1503 and the synchronous rope driven wheel 1506 are respectively arranged on two elbow hinge rotating pins 1512 (the installation of the synchronous rope driving wheel 1503 and the synchronous rope driven wheel 1506 has no mandatory corresponding relationship with the installation of the driving elbow mother hinge A1501 and the elbow mother hinge B1502), the two synchronous rope transmission idler wheels 1504 are installed on the fixed seat 1508 for vertical rotation, and the synchronous rope 1505 is wrapped around the synchronous rope driving wheel 1503, the synchronous rope driven wheel 1506 and the two synchronous rope transmission idler wheels 1504.

[0044] Furthermore, the synchronous rope 1505 is arranged in an "8" shape near the synchronous rope driven wheel 1506, so that the rotation directions of the synchronous rope driving wheel 1503 and the synchronous rope driven wheel 1506 are opposite; a synchronous rope tensioner 1507 is provided on the synchronous rope driven wheel 1506. The synchronous rope 1505 is installed on the synchronous rope tensioner 1507, and the synchronous rope 1505 is tensioned by the synchronous rope tensioner 1507, which can drive the elbow female hinge A1501 and the elbow female hinge B1502 to rotate synchronously.

[0045] In an embodiment of the present invention, the synchronous gear transmission assembly includes a driven bevel gear 1509 and a driving bevel gear 1510, wherein the driving bevel gear 1510 is installed on an elbow hinge rotating pin 1512, and the driven bevel gear 1509 is rotatably installed on the side of the fixed seat 1508, and the driven bevel gear 1509 is meshed with the driving bevel gear 1510; the driven bevel gear 1509 is connected to the elbow synchronous unfolding beam 2.

[0046] Specifically, the elbow hinge 15 drives the elbow mother hinge A1501 and the elbow mother hinge B1502 to rotate respectively through two hinge driving torsion springs 1511, and realizes the synchronization of the elbow mother hinge A1501 and the elbow mother hinge B1502 through the synchronization rope 1505, and drives the driven bevel gear 1509 to rotate through the driving bevel gear 1510, which can meet the bidirectional synchronous power output requirements of the elbow hinge 15, realize two-dimensional synchronous transmission, and also facilitate structural expansion. The driven bevel gear 1509 is fixedly installed with the elbow synchronous deployment beam 2, because it can provide the deployment power for the elbow synchronous deployment beam 2, and can also ensure synchronous deployment.

[0047] See also Figure 7 and Figure 8 As shown, in an embodiment of the present invention, the elbow synchronous deployment beam 2 includes two elbow beams 21 and an elbow pin hinge 22 connected between the two elbow beams 21, and an elbow beam synchronous deployment component is also connected between the two elbow beams 21, and the ends of the two elbow beams 21 are respectively connected to the elbow hinges 15 on both sides.

[0048] In an embodiment of the present invention, the elbow beam synchronous deployment component includes an elbow inclined beam 23, an elbow synchronous deployment gear 24, an elbow synchronous deployment gear seat 25 and an elbow deployment rotating pin 26, wherein there are two elbow inclined beams 23, one end of the two elbow inclined beams 23 is respectively hinged to the two elbow beams 21, and the other ends of the two elbow inclined beams 23 are respectively fixed with elbow synchronous deployment gears 24, and the elbow synchronous deployment gear 24 is hinged to the elbow synchronous deployment gear seat 25 through the elbow deployment rotating pin 26 to meet the mutual meshing of the two elbow synchronous deployment gears 24, and the elbow synchronous deployment gear 24 can rotate around the axis of the elbow deployment rotating pin 26. The elbow synchronous deployment gear seat 25 ensures the center distance of the transmission of the two elbow synchronous deployment gears 24, and prevents other things from floating in the space into the two elbow synchronous deployment gears 24, causing jamming. The two mutually meshing elbow synchronous deployment gear seats 25 ensure that the two elbow beams 21 are folded or unfolded synchronously.

[0049] Specifically, the end of the elbow beam 21 is fixedly mounted to the driven bevel gear 1509 in the elbow hinge 15, and the driven bevel gear 1509 rotates to drive the elbow beam 21 to unfold or fold. The elbow pin hinge 22 is a common pin hinge, and the built-in torsion spring can provide a rotational driving force, and can achieve a locking function after being unfolded. The elbow synchronous unfolding gear 24, the elbow synchronous unfolding gear seat 25, the elbow pin hinge 22 and the elbow oblique beam 23 constitute a single-degree-of-freedom connecting rod mechanism. As the elbow pin hinge 22 is driven to unfold, the elbow beams 21 on both sides can be unfolded synchronously.

[0050] See also Fig. 9 As shown, in an embodiment of the present invention, the root deployment beam 3 includes a root deployment beam fixing seat 31, a root deployment beam rotating pin 32, a root beam 33 and a root deployment hinge 34, wherein there are two root beams 33, the two root beams 33 are connected by a root deployment hinge 34, the ends of the two root beams 33 are rotatably connected to the two root deployment beam fixing seats 31 respectively through the root deployment beam rotating pin 32, and the two root deployment beam fixing seats 31 are respectively connected to the root rib rods 11 on both sides.

[0051] Specifically, the root deployment hinge 34 has a built-in torsion spring, which can drive the root deployment beam 3 to rotate and deploy and lock in place.

[0052] See also Fig.10 and Fig.11 As shown, in the embodiment of the present invention, the end unfolding beam 4 includes a plurality of end beams 42 connected in sequence through an end pin hinge 41, and the folding directions of two adjacent end beams 42 are opposite, and the end beams 42 located at the two ends are connected to the two end ribs 13 through the end pin hinge 41. Specifically, the end pin hinge 41 is a common pin hinge, with a built-in torsion spring that can provide a rotation driving force, and can achieve a locking function in place after being unfolded. The plurality of end beams 42 are folded forward and backward in sequence and then gathered between the two parabolic ribs 1.

[0053] See also Figure 3 As shown, the present invention provides a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector, and the folded state is: the elbow rib bar 12 is folded nearly 90° relative to the root rib bar 11, and the end rib bar 13 is folded nearly 180° to the bottom of the elbow rib bar 12; at this time, the elbow synchronous unfolding beam 2, the root unfolding beam 3 and the end unfolding beam 4 are all folded between the two parabolic rib bars 1.

[0054] The invention provides a high-precision two-dimensional synchronous unfolding mechanism for a parabolic reflector, which is mainly used in the field of aerospace folding and unfolding mechanism technology. The unfolding process can be simplified by the two-dimensional synchronous unfolding mechanism. The synchronous rope and gear transmission combination is adopted to reduce the weight of the product under the condition of ensuring the motion accuracy compared with the connecting rod mechanism; the synchronous rope and gear rigid-flexible combined transmission configuration is adopted, which reduces the processing accuracy requirements while ensuring high transmission accuracy compared with the transmission of rigid structure transmission, takes into account the high storage ratio and high-precision performance, and meets the advantages of lightweight requirements. In addition, the modular design is adopted, and the product is easy to assemble and can meet the requirements of large-scale.

[0055] The above description is only an embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, expansion, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector, characterized in that: It comprises two parabolic ribs (1) arranged in parallel and a cylindrical unfolded beam connected between the two parabolic ribs (1), wherein the two parabolic ribs (1) are both parabolic in shape; The parabola rib bar (1) comprises a root rib bar (11), an elbow rib bar (12), an end rib bar (13), a root hinge (14) and an elbow hinge (15), wherein one end of the elbow rib bar (12) is connected to one end of the root rib bar (11) via the root hinge (14), and the other end of the elbow rib bar (12) is connected to one end of the end rib bar (13) via the elbow hinge (15); the elbow hinge (15) is connected to the column unfolding beam, so as to realize the linkage unfolding or folding of the column unfolding beam and the two parabola rib bars (1); The elbow hinge (15) comprises an elbow mother hinge A (1501), an elbow mother hinge B (1502), a fixing seat (1508), a hinge driving torsion spring (1511), an elbow hinge swivel pin (1512), a synchronous rope transmission assembly and a synchronous gear transmission assembly, wherein the elbow mother hinge A (1501) and the elbow mother hinge B (1502) are respectively connected to the elbow rib rod (12) and the end rib rod (13), and the fixing seat (1508) is arranged on the elbow mother hinge A (1501) and Between the elbow female hinge B (1502), the front and rear ends of the fixed seat (1508) are rotatably connected to the elbow female hinge A (1501) and the elbow female hinge B (1502) respectively through two elbow hinge rotating pins (1512), and each elbow hinge rotating pin (1512) is sleeved with a hinge driving torsion spring (1511), one end of the hinge driving torsion spring (1511) is in contact with the fixed seat (1508), and the other end is in contact with the elbow female hinge A (1501) or the elbow female hinge B (1502); The synchronous rope transmission assembly is arranged on the fixing seat (1508) and is connected to the elbow female hinge A (1501) and the elbow female hinge B (1502). The synchronous rope transmission assembly is used for synchronously unfolding or folding the elbow female hinge A (1501) and the elbow female hinge B (1502); The synchronous gear transmission assembly is arranged on the fixing seat (1508) and is connected to the cylindrical unfolding beam. The synchronous gear transmission assembly is used for synchronously unfolding or folding the cylindrical unfolding beam and the parabolic rib rod (1).

2. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 1, characterized in that: The synchronous rope transmission assembly comprises a synchronous rope driving wheel (1503), a synchronous rope (1505), a synchronous rope driven wheel (1506) and two synchronous rope transmission idle wheels (1504), wherein the synchronous rope driving wheel (1503) and the synchronous rope driven wheel (1506) are respectively arranged on the two elbow hinge rotating pins (1512), the two synchronous rope transmission idle wheels (1504) are installed on the fixing seat (1508) to rotate up and down, and the synchronous rope (1505) is wrapped around the synchronous rope driving wheel (1503), the synchronous rope driven wheel (1506) and the two synchronous rope transmission idle wheels (1504).

3. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 2, characterized in that: The synchronous ropes (1505) are arranged crosswise in an "8" shape near the synchronous rope driven wheel (1506), so that the rotation directions of the synchronous rope driving wheel (1503) and the synchronous rope driven wheel (1506) are opposite; a synchronous rope tensioner (1507) is provided on the synchronous rope driven wheel (1506), and the synchronous rope (1505) is mounted on the synchronous rope tensioner (1507) and tensioned by the synchronous rope tensioner (1507).

4. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 1, characterized in that: The synchronous gear transmission assembly comprises a driven bevel gear (1509) and a driving bevel gear (1510), wherein the driving bevel gear (1510) is mounted on a rotating pin shaft (1512) of the elbow hinge, and the driven bevel gear (1509) is rotatably mounted on the side of the fixed seat (1508), and the driven bevel gear (1509) is meshed with the driving bevel gear (1510); the driven bevel gear (1509) is connected to the cylindrical unfolding beam.

5. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 1, characterized in that: The cylindrical expansion beam comprises an elbow synchronous expansion beam (2), a root expansion beam (3) and an end expansion beam (4), wherein the elbow synchronous expansion beam (2) is connected between two elbow hinges (15), the root expansion beam (3) is connected between the ends of two root ribs (11), and the end expansion beam (4) is connected between the ends of two end ribs (13).

6. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 5, characterized in that: The elbow synchronous deployment beam (2) comprises two elbow beams (21) and an elbow pin hinge (22) connected between the two elbow beams (21), and the ends of the two elbow beams (21) are respectively connected to the elbow hinges (15) on both sides; An elbow beam synchronous deployment component is also connected between the two elbow beams (21); the elbow beam synchronous deployment component comprises an elbow inclined beam (23), an elbow synchronous deployment gear (24), an elbow synchronous deployment gear seat (25) and an elbow deployment rotating pin (26), wherein there are two elbow inclined beams (23), one end of the two elbow inclined beams (23) is respectively hinged to the two elbow beams (21), and the other ends of the two elbow inclined beams (23) are respectively fixed with elbow synchronous deployment gears (24), and the elbow synchronous deployment gear (24) and the elbow synchronous deployment gear seat (25) are hinged via the elbow deployment rotating pin (26) to ensure that the two elbow synchronous deployment gears (24) are meshed with each other.

7. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 5, characterized in that: The root expansion beam (3) comprises a root expansion beam fixing seat (31), a root expansion beam swivel pin (32), a root beam (33) and a root expansion hinge (34), wherein there are two root beams (33), the two root beams (33) are connected via a root expansion hinge (34), the ends of the two root beams (33) are rotatably connected to the two root expansion beam fixing seats (31) via the root expansion beam swivel pin (32), and the two root expansion beam fixing seats (31) are respectively connected to the root rib bars (11) on both sides.

8. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 5, characterized in that: The end unfolding beam (4) comprises a plurality of end beams (42) connected in sequence via end pin hinges (41), and the folding directions of two adjacent end beams (42) are opposite, and the end beams (42) located at the two side ends are hinged to the two end ribs (13) via hinges.

9. The high-precision two-dimensional synchronous deployment mechanism for a parabolic reflector according to claim 1, characterized in that: The length of the root rib (11) is smaller than the length of the elbow rib (12) and the end rib (13); the root hinge (14) and the elbow hinge (15) are finely adjusted in angle according to posture requirements during assembly to meet the requirements of unfolding accuracy, and are self-locking in place after being rotated to a specified angle; micro switches are installed on the root hinge (14) and the elbow hinge (15), and a position signal is fed back after being unfolded into place.

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