A large aperture reflector antenna servo mechanism

Abstract

The application provides a large aperture reflecting arc antenna servo mechanism, which comprises an antenna base, an azimuth gear bearing, an antenna turntable assembly, an azimuth transmission assembly, an elevation transmission assembly, a servo control assembly, a main reflecting surface assembly, a support arm assembly and a secondary reflecting surface assembly; the azimuth gear bearing is used for being installed on the antenna base, and the antenna turntable assembly is used for being installed on the azimuth gear bearing; the azimuth and elevation transmission assemblies are installed in the cavity of the antenna turntable assembly to control the transmission of the antenna. The main and secondary reflecting surfaces of the antenna adopt adjustable mechanisms, so that the measurement and adjustment of the reflecting surfaces of the antenna are fast and accurate. The elevation transmission of the antenna adopts a planetary gear reducer, which improves the carrying capacity, transmission efficiency and transmission precision, so that the structure is compact and the reliability is high. The azimuth shaft motor, the reducer and the high-precision shaft angle encoder adopt the same type design, so that the device replacement is convenient and the maintainability is good. The application adopts a fully-sealed seat frame design, is easy to install and meets the environmental adaptability and electromagnetic compatibility.

Description

Technical Field

[0001] This application relates to the technical field of antennas, and in particular to a servo mechanism for a large-aperture reflective arc antenna. Background Technology

[0002] With the rapid development of satellite communication technology, fixed-station communication has great application prospects in military and government security. As a fixed command station, fixed-station communication is a particularly important subsystem in satellite communication systems. In addition to providing beyond-line-of-sight communication and stable and reliable transmission, it also enables mobile stations and high bandwidth.

[0003] Large-aperture stationary communication antennas refer to antennas installed at fixed locations for satellite search. These fixed locations serve as the foundation for establishing the entire satellite system. Such antennas can only perform communication operations in a fixed state and cannot be moved or the satellite search process becomes complicated after moving them. Therefore, it is of great significance to study a large-aperture reflective arc antenna servo mechanism. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a large-aperture reflective arc antenna servo control mechanism, which is compact in structure, easy to maintain, lightweight, large in diameter, and highly reliable. At the same time, it can be mounted on the roof of a vehicle to establish a ground station at any designated location, and has a certain degree of transport and portability, and can carry out communication work in different locations.

[0005] The technical solution of this invention is:

[0006] A large-aperture reflective arc antenna servo mechanism is characterized by comprising an antenna base, an azimuth gear bearing, an antenna turntable assembly, an azimuth transmission assembly, an elevation transmission assembly, a servo control assembly, a main reflector assembly, a support arm assembly, and a secondary reflector assembly.

[0007] The azimuth gear bearing is mounted on the antenna base, and the antenna turntable assembly is mounted on the azimuth gear bearing; the azimuth drive assembly, the pitch drive assembly, and the servo control assembly are mounted inside the antenna turntable assembly cavity, the main reflector assembly is mounted on the pitch drive assembly, the support arm assembly is mounted on the main reflector assembly, and the secondary reflector assembly is mounted on the support arm assembly.

[0008] Furthermore, the antenna turntable assembly includes an antenna turntable frame, a left elevation cover plate, a right elevation cover plate, and an upper antenna turntable cover plate. The antenna turntable frame is mounted on the azimuth gear bearing, and the left elevation cover plate, the right elevation cover plate, and the upper antenna turntable cover plate are respectively mounted on the left, right, and top sides of the antenna turntable frame.

[0009] Furthermore, the azimuth transmission assembly includes an azimuth motor frame, an azimuth motor, an azimuth gear, an azimuth reducer, a large azimuth gear, a small azimuth gear, a slip ring bracket, and a multi-channel azimuth slip ring. The azimuth motor frame is installed within the antenna turntable frame cavity, the azimuth motor is mounted on the azimuth motor frame, and the azimuth gear is mounted on the output shaft of the azimuth motor. The azimuth reducer is installed within the antenna turntable frame cavity, the large azimuth gear is mounted on the input shaft of the azimuth reducer, and the small azimuth gear is mounted on the output shaft of the azimuth reducer. The azimuth gear and the large azimuth gear mesh, and the small azimuth gear meshes with the azimuth gear bearing. Thus, the azimuth motor drives the azimuth reducer to rotate, thereby driving the antenna turntable assembly to rotate. The slip ring bracket is installed within the antenna turntable frame cavity, and the multi-channel azimuth slip ring is mounted on the slip ring bracket. The multi-channel azimuth slip ring can connect the servo control component to an external interface.

[0010] Furthermore, the pitch transmission assembly includes a pitch motor frame, a pitch motor, a pitch reducer, a pitch pinion, a pitch intermediate shaft, a pitch intermediate gear, an RV reducer, a pitch large gear, a pitch bearing housing, a pitch bearing, a left pitch shaft, a pitch bearing pressure ring, a pitch rotary encoder, a pitch position sensing plate, a pitch limit mounting plate, an upper limit switch, an upper limit Hall effect sensor, a start Hall effect sensor, a zero position Hall effect sensor, a lower limit Hall effect sensor, and a lower limit switch.

[0011] The pitch motor mount is installed in the right cavity of the antenna turntable frame. The pitch motor is installed in the pitch motor mount. The pitch reducer is installed in the right cavity of the antenna turntable frame. The pitch pinion is installed on the output shaft of the pitch reducer. The pitch intermediate shaft is installed in the right cavity of the antenna turntable frame. The pitch intermediate gear is installed on the pitch intermediate shaft. The RV reducer is installed in the right cavity of the antenna turntable frame. The pitch gear is installed on the input shaft of the RV reducer. The pitch pinion meshes with the pitch intermediate gear, and the pitch intermediate gear meshes with the pitch gear. Thus, the pitch motor drives the pitch reducer to rotate, thereby driving the... The RV reducer rotates; the pitch bearing housing is installed in the left cavity of the antenna turntable frame, the outer ring of the pitch bearing is installed on the pitch bearing housing, the left pitch shaft is installed on the inner ring of the pitch bearing, the pitch bearing pressure ring is installed on the pitch bearing housing, the pitch rotary encoder is installed on the pitch bearing pressure ring, the inner ring of the pitch rotary encoder is installed on the left pitch shaft, the pitch position sensing plate is installed on the left pitch shaft, the pitch limit mounting plate is installed on the pitch bearing housing, and the upper limit switch, the upper limit Hall effect sensor, the start Hall effect sensor, the zero position Hall effect sensor, the lower limit Hall effect sensor, and the lower limit switch are sequentially fixed on the pitch limit device mounting plate.

[0012] Furthermore, the servo control component includes an azimuth motor driver, a pitch motor driver, a controller, and a DC power supply. The azimuth motor driver, the controller, and the DC power supply are installed inside the antenna turntable frame cavity, and the pitch motor driver is installed inside the right cavity of the antenna turntable frame.

[0013] Furthermore, the main reflector assembly includes a main reflector, an antenna back frame, a left antenna plate, a right antenna plate, and an antenna axis. The main reflector is mounted on the antenna back frame, the left and right antenna plates are mounted on the antenna back frame, and the two ends of the antenna axis are respectively mounted on the left and right antenna plates. The left antenna plate is mounted on the left elevation axis, and the right antenna plate is mounted on the RV reducer. The rotation of the RV reducer sequentially drives the main reflector assembly to rotate in pitch, the left elevation axis to rotate, and the pitch position sensing plate to rotate, thereby obtaining the pitch position of the main reflector and controlling its start / stop. The azimuth transmission assembly drives the antenna turntable assembly to rotate in azimuth, thereby driving the main reflector assembly to rotate in azimuth.

[0014] Furthermore, the support arm assembly includes a left support arm, a right support arm, a reinforcing beam 1, a reinforcing beam 2, a left gas spring, and a right gas spring. The left and right support arms are fixed by the reinforcing beams 1 and 2. The left support arm is mounted on the left side plate of the antenna surface, and the right support arm is mounted on the right side plate of the antenna surface. The left support arm is connected to the antenna back frame via the left gas spring, and the right support arm is connected to the antenna back frame via the right gas spring. The main reflector assembly drives the support arm assembly to rise, and after rising, it maintains a certain angle with the main reflector assembly and the support arm assembly, and they rotate together in a pitching motion.

[0015] Further, the sub-reflector assembly includes a sub-reflector support frame, a sub-reflector rotating plate, a sub-reflector conversion plate, a sub-reflector left side support frame, a sub-reflector right side support frame, a sub-reflector, a sub-reflector support connecting rod, an upper fixing head, a lower fixing head, a hinge screw, a left wheel, and a right wheel. The sub-reflector rotating plate is mounted on the sub-reflector support frame, the sub-reflector conversion plate is mounted on the sub-reflector rotating plate, the sub-reflector left side support frame and the sub-reflector right side support frame are mounted on the sub-reflector conversion plate, the two ends of the sub-reflector are respectively mounted on the sub-reflector left side support frame and the sub-reflector right side support frame, the two ends of the sub-reflector support connecting rod are fixed to the sub-reflector left side support frame and the sub-reflector right side support frame, the upper fixing head is mounted on the sub-reflector support connecting rod, and the lower fixing head is mounted on the sub-reflector; the hinge screw connects the upper fixing head and the lower fixing head, and the hinge screw can adjust the pitch angle of the sub-reflector; the left wheel and the right wheel are mounted below the sub-reflector support frame. The secondary reflector support frame is fixed at both ends to the left and right support arms. After the main reflector assembly is raised, it maintains a certain angle with the secondary reflector assembly through the support arm assembly, and the main reflector assembly drives the secondary reflector assembly to pitch and rotate. When the antenna is stored, the secondary reflector assembly and the support arm assembly are smoothly lowered by the left and right wheels.

[0016] In summary, this application includes at least the following beneficial technical effects:

[0017] The present invention employs an azimuth transmission component and a pitch transmission component to adjust the accuracy of the antenna main reflector, enabling the antenna reflector to be quickly and accurately adjusted and measured in terms of rotation and pitch angles.

[0018] The pitch transmission of this invention uses a planetary gear reducer, which improves load-bearing capacity, transmission efficiency and transmission accuracy, resulting in a compact structure and improved system reliability.

[0019] This invention adopts a fully sealed bracket design, which is technically mature, easy to install, and meets the requirements of environmental adaptability and electromagnetic compatibility.

[0020] The present invention employs the aforementioned azimuth multi-channel slip ring to achieve 360-degree infinite azimuth rotation, ensuring continuous rotation of the antenna azimuth axis.

[0021] The servo control of this invention adopts a fully digital design, which is highly reliable, allows for quick and convenient parameter adjustment, has fewer components, and is easy to maintain.

[0022] In this invention, the azimuth motor and pitch motor are of the same model, and the azimuth and pitch motor drivers are of the same model. This design makes them easy to replace and convenient to maintain.

[0023] This invention employs comprehensive mechanical and electrical protection measures, ensuring safety and reliability. Attached Figure Description

[0024] Figure 1 This is a structural appearance diagram of the present invention;

[0025] Figure 2 This is a schematic diagram of the antenna base and azimuth gear bearing of the present invention;

[0026] Figure 3 This is a schematic diagram of the orientation turntable assembly of the present invention;

[0027] Figure 4 This is a schematic diagram of the orientation transmission component and servo control component of the present invention;

[0028] Figure 5 This is a schematic diagram of the orientation transmission component of the present invention;

[0029] Figure 6 This is a schematic diagram of the pitch transmission assembly and servo control assembly of the present invention;

[0030] Figure 7 This is a schematic diagram of the pitch transmission assembly of the present invention;

[0031] Figure 8 This is a schematic diagram of the main antenna surface assembly of the present invention;

[0032] Figure 9 This is a schematic diagram of the outrigger assembly of the present invention;

[0033] Figure 10 This is a schematic diagram of the sub-reflective surface assembly of the present invention.

[0034] Explanation of reference numerals in the attached diagram: 1-Antenna base; 2-Azimuth gear bearing; 3-Antenna turntable assembly; 4-Antenna turntable frame; 5-Left elevation cover plate; 6-Right elevation cover plate; 7-Upper antenna turntable cover plate; 9-Azimuth motor bracket; 10-Azimuth motor; 11-Azimuth gear; 12-Azimuth reducer; 13-Large azimuth gear; 14-Small azimuth gear; 15-Slip ring bracket; 16-Multi-channel azimuth slip ring; 18-Elevation motor bracket; 19 20-Pitch motor; 21-Pitch reducer; 22-Pitch pinion; 23-Pitch intermediate shaft; 24-Pitch intermediate gear; 25-RV reducer; 26-Pitch gear; 27-Pitch bearing housing; 28-Pitch left shaft; 29-Pitch bearing pressure ring; 30-Pitch rotary encoder; 31-Pitch position sensing plate; 32-Pitch limit mounting plate; 33-Upper limit switch; 34-Upper limit Hall effect sensor. 35-Start Hall Effect; 36-Zero Position Hall Effect; 37-Lower Limit Hall Effect; 38-Lower Limit Switch; 40-Azimuth Motor Driver; 41-Pitch Motor Driver; 42-Controller; 43-DC Power Supply; 44-Main Reflector Assembly; 45-Main Reflector; 46-Antenna Back Mount; 47-Left Side Antenna Plate; 48-Right Side Antenna Plate; 49-Antenna Axis; 50-Arm Assembly; 51-Left Arm; 52-Right Arm; 5 3-Reinforcing beam 1; 54-Reinforcing beam 2; 55-Left side gas spring; 56-Right side gas spring; 57-Sub-reflector assembly; 58-Sub-reflector support frame; 59-Sub-reflector rotating plate; 60-Sub-reflector conversion plate; 61-Left side support frame of sub-reflector; 62-Right side support frame of sub-reflector; 63-Sub-reflector; 64-Sub-reflector support connecting rod; 65-Upper fixing head; 66-Lower fixing head; 67-Hinge screw; 68-Left wheel; 69-Right wheel. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that terms such as "upper," "lower," "left," "right," "middle," "outer," "first," and "second" are used merely to distinguish descriptions and do not indicate or imply that the entities or operations referred to must have a specific orientation or order. Furthermore, the terms "install," "set," and "connect" should be interpreted broadly. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] like Figure 1-2As shown, the present invention provides a technical solution: a large-aperture reflector antenna servo mechanism, including an antenna base 1, an azimuth gear bearing 2, an antenna turntable assembly 3, an azimuth transmission assembly 8, an elevation transmission assembly 17, a servo control assembly 39, a main reflector assembly 44, a support arm assembly 50, and a secondary reflector assembly 57. The azimuth gear bearing 2 is mounted on the antenna base 1, with its outer and inner rings rotatably connected. The outer ring of the azimuth gear bearing 2 is rotatably connected to the antenna base 1, while its inner ring is fixedly connected to the antenna base 1. The antenna turntable assembly 3 is mounted on the azimuth gear bearing 2. The azimuth transmission assembly 5, the elevation transmission assembly 17, and the servo control assembly 39 are installed inside the cavity of the antenna turntable assembly 3. The main reflector assembly 44 is mounted on the elevation transmission assembly 17, the support arm assembly 50 is mounted on the main reflector assembly 44, and the secondary reflector assembly 57 is mounted on the support arm assembly 50.

[0038] like Figure 3 As shown, the antenna turntable assembly 3 includes an antenna turntable frame 4, a left elevation cover plate 5, a right elevation cover plate 6, and an upper antenna turntable cover plate 7. The antenna turntable frame 4 is mounted on the top of the outer ring of the azimuth gear bearing 2, and the left elevation cover plate 5, the right elevation cover plate 6, and the upper antenna turntable cover plate 7 are respectively mounted on the left, right, and top sides of the antenna turntable frame 4.

[0039] like Figure 4-5 As shown, the azimuth transmission assembly 8 includes an azimuth motor frame 9, an azimuth motor 10, an azimuth gear 11, an azimuth reducer 12, a large azimuth gear 13, a small azimuth gear 14, a slip ring bracket 15, and a multi-channel azimuth slip ring 16. An azimuth motor bracket 9 is installed inside the antenna turntable frame 4 cavity, an azimuth motor 10 is installed on the azimuth motor bracket 9, and an azimuth gear 11 is installed on the output shaft of the azimuth motor 10. An azimuth reducer 12 is installed inside the antenna turntable frame 4 cavity, a large azimuth gear 13 is installed on the input shaft of the azimuth reducer 12, and a small azimuth gear 14 is installed on the output shaft of the azimuth reducer 12. The azimuth gear 11 and the large azimuth gear 13 mesh, and the small azimuth gear 14 meshes with the azimuth gear bearing 2. In this way, the azimuth motor 10 drives the azimuth reducer 12 to rotate, thereby driving the antenna turntable assembly 3 to rotate. A slip ring bracket 15 is installed inside the antenna turntable frame 4 cavity, and an azimuth multi-channel slip ring 16 is installed on the slip ring bracket 15. The azimuth multi-channel slip ring 16 can transfer the servo control assembly 39 to an external interface.

[0040] like Figure 6-7As shown, the pitch transmission assembly 17 includes a pitch motor frame 18, a pitch motor 19, a pitch reducer 20, a pitch pinion 21, a pitch intermediate shaft 22, a pitch intermediate gear 23, an RV reducer 24, a pitch gear 25, a pitch bearing housing 26, a pitch bearing 27, a left pitch shaft 28, a pitch bearing pressure ring 29, a pitch rotary encoder 30, a pitch position sensing plate 31, a pitch limit mounting plate 32, an upper limit switch 33, an upper limit Hall sensor 34, a start Hall sensor 35, a zero position Hall sensor 36, a lower limit Hall sensor 37, and a lower limit switch 38. The pitch motor mount 18 is installed in the right cavity of the antenna turntable frame 4. The pitch motor 19 is installed in the pitch motor mount 18. The pitch reducer 20 is installed in the right cavity of the antenna turntable frame 4. The pitch pinion gear 21 is installed on the output shaft of the pitch reducer 20. The pitch intermediate shaft 22 is installed in the right cavity of the antenna turntable frame 4. The pitch intermediate gear 23 is installed on the pitch intermediate shaft 22. The RV reducer 24 is installed in the right cavity of the antenna turntable frame 4. The pitch gear 25 is installed on the input shaft of the RV reducer 24. The pitch pinion gear 21 meshes with the pitch intermediate gear 23, and the pitch intermediate gear 23 meshes with the pitch gear 25. The output shaft of the pitch motor 19 is connected to the input shaft of the pitch reducer 20, thereby driving the pitch reducer. 20 rotates, thereby driving RV reducer 24 to rotate; pitch bearing housing 26 is installed in the left cavity of antenna turntable frame 4, the outer ring of pitch bearing 27 is installed on pitch bearing housing 26, the left pitch shaft 28 is installed on the inner ring of pitch bearing 27, the pitch bearing pressure ring 29 is installed on pitch bearing housing 26, the pitch rotary encoder 30 is installed on the pitch bearing pressure ring 29, the inner ring of the pitch rotary encoder 30 is installed on the left pitch shaft 28, the position sensing plate 31 is installed on the left pitch shaft 28, the pitch limit mounting plate 32 is installed on pitch bearing housing 26, and the upper limit switch 33, upper limit Hall 34, start Hall 35, zero position Hall 36, lower limit Hall 37, and lower limit switch 38 are sequentially fixed on the pitch limit device mounting plate 32.

[0041] like Figure 4 and 6As shown, the servo control component 39 includes an azimuth motor driver 40, a pitch motor driver 41, a controller 42, and a DC power supply 43. The azimuth motor driver 40, controller 42, and DC power supply 43 are installed inside the antenna turntable frame 4 cavity, while the pitch motor driver 41 is installed inside the right cavity of the antenna turntable frame 4. The DC power supply 43 provides power to the azimuth motor driver 40, pitch motor driver 41, controller 42, DC power supply 43, and other devices requiring power. The azimuth motor driver 40 sends control signals to the azimuth motor 10, which receives and executes the control signals. The pitch motor driver 41 sends control signals to the pitch motor 19, which receives and executes the control signals. The controller 42 controls the azimuth motor driver 40 and the pitch motor driver 41.

[0042] like Figure 8 As shown, the main reflector assembly 44 includes a main reflector 45, an antenna back frame 46, a left antenna plate 47, a right antenna plate 48, and an antenna shaft 49. The main reflector 45 is mounted on the antenna back frame 46, the left antenna plate 47 and the right antenna plate 48 are mounted on the antenna back frame 46, and the two ends of the antenna shaft 49 are respectively mounted on the left antenna plate 47 and the right antenna plate 48. The left antenna plate 47 is mounted on the left elevation shaft 28, and the right antenna plate 48 is mounted on the RV reducer 24. The rotation of the RV reducer 24 sequentially drives the main reflector assembly 44 to rotate in pitch, the left elevation shaft 28 to rotate, and the pitch position sensing plate 31 to rotate, thereby obtaining the pitch position of the main reflector 45 and controlling its start and stop. The azimuth transmission assembly 8 drives the antenna turntable assembly 3 to rotate in azimuth, thereby driving the main reflector assembly 44 to rotate in azimuth.

[0043] like Figure 9 The shown support arm assembly 50 includes a left support arm 51, a right support arm 52, a reinforcing beam 153, a reinforcing beam 254, a left gas spring 55, and a right gas spring 56. The left support arm 51 and the right support arm 52 are fixed by the reinforcing beams 153 and 254. The left support arm 51 is rotatably mounted on the left side plate 47 of the antenna surface, and the right support arm 52 is rotatably mounted on the right side plate 48 of the antenna surface. The left side plate 47 and the right side plate 48 are connected by limit bolts, which are located on the side of the left support arm 51 and the right support arm 52 away from the main reflector assembly 44. The left support arm 51 is connected to the antenna back frame 46 through the left gas spring 55, and the right support arm 52 is connected to the antenna back frame 46 through the right gas spring 56. The main reflector assembly 44 drives the support arm assembly 50 to rise, and after rising, it maintains a certain angle with the main reflector assembly 44 and the support arm assembly 50 to pitch and rotate together.

[0044] like Figure 10As shown, the sub-reflector assembly 57 includes a sub-reflector support frame 58, a sub-reflector rotating plate 59, a sub-reflector conversion plate 60, a sub-reflector left side support frame 61, a sub-reflector right side support frame 62, a sub-reflector 63, a sub-reflector support connecting rod 64, an upper fixing head 65, a lower fixing head 66, a hinge screw 67, a left wheel 68, and a right wheel 69. The sub-reflector rotating plate 59 is rotatably mounted on the sub-reflector support frame 58. The sub-reflector rotating plate 59 and the sub-reflector support frame 58 are connected by locking bolts. When the locking bolts are loosened, the sub-reflector rotating plate 59 can rotate relative to the center of the sub-reflector support frame 58 to adjust the reflection angle; conversely, when the bolts are tightened, the sub-reflector rotating plate 59 is fixed to the sub-reflector support frame 58. The sub-face conversion plate 60 is fixedly mounted on the sub-face rotating plate 59. The sub-face left support frame 61 and the sub-face right support frame 62 are mounted on the sub-face conversion plate 60. The two ends of the sub-reflective surface 63 are respectively mounted on the sub-face left support frame 61 and the sub-face right support frame 62. Specifically, the sub-reflective surface 63 is rotatably connected to the sub-face left support frame 61 and the sub-face right support frame 62. The left support frame 61 and the sub-face right support frame 62 are provided with arc-shaped slots with the rotation axis of the sub-reflective surface 63 as the axis. The sub-reflective surface 63 is connected with fastening bolts, which are inserted into the arc-shaped slots. When the fastening bolts are tightened, the sub-reflector 63 is fixed relative to the left support frame 61 and the right support frame 62 and cannot continue to rotate. The two ends of the sub-reflector support connecting rod 64 are fixed to the left support frame 61 and the right support frame 62. The upper fixing head 65 is installed on the sub-reflector support connecting rod 64, and the lower fixing head 66 is installed on the sub-reflector 63. The hinge screw 67 connects the upper fixing head 65 and the lower fixing head 66, and the hinge screw 67 can adjust the pitch angle of the sub-reflector 63. The left wheel 68 and the right wheel 69 are installed under the sub-reflector support frame 58. The two ends of the sub-reflector support frame 58 are fixed to the left support arm 51 and the right support arm 52. After the main reflector assembly 44 is raised, it maintains a certain angle with the sub-reflector assembly 57 through the support arm assembly 50, and the main reflector assembly 44 drives the sub-reflector assembly 57 to pitch and rotate. When storing the antenna, the sub-reflector assembly 57 and the support arm assembly 50 are smoothly lowered using the left wheel 68 and the right wheel 69.

[0045] The antenna's main and secondary reflectors employ an adjustable mechanism, enabling rapid and accurate measurement and adjustment. The elevation drive utilizes a planetary gear reducer (24), improving load-bearing capacity, transmission efficiency, and accuracy, resulting in a compact structure and enhanced system reliability. A fully sealed mounting design is employed, featuring mature technology, ease of installation, and compliance with environmental adaptability and electromagnetic compatibility requirements. A multi-channel azimuth slip ring (16) enables 360-degree infinite azimuth rotation, ensuring continuous rotation of the antenna's azimuth axis. The servo control employs a fully digital design, offering high reliability, quick and convenient parameter adjustment, fewer components, and ease of maintenance. The azimuth and elevation motors, along with their drivers, are of the same model, facilitating easy replacement and maintenance. Comprehensive mechanical and electrical protection measures ensure safety and reliability.

[0046] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims of the present invention.

Claims

1. A servo mechanism for a large-aperture reflective arc antenna, characterized in that: It includes an antenna base (1), an antenna turntable assembly (3), an azimuth gear bearing (2), a main reflector assembly (44), a support arm assembly (50), a secondary reflector assembly (57), an azimuth drive assembly (8), and a pitch drive assembly (17); The antenna turntable assembly (3) is rotatably connected to the antenna base (1) via the azimuth gear bearing (2), and the azimuth transmission assembly (8) is used to adjust the angle between the antenna turntable assembly (3) and the antenna base (1); The sub-reflector assembly (57) is connected to the arm assembly (50), the main reflector assembly (44) and the arm assembly (50) are connected to the antenna turntable assembly (3), and the pitch drive assembly (17) is used to adjust the pitch angle of the main reflector assembly (44) and the sub-reflector assembly (57). The azimuth transmission assembly includes an azimuth motor (10) and an azimuth pinion (14). The azimuth motor (10) is connected to the antenna turntable assembly. The azimuth motor (10) is used to drive the azimuth pinion (14) to rotate. The inner ring of the azimuth pinion bearing is fixedly connected to the antenna base, and the outer ring of the azimuth pinion bearing is rotatably connected to the antenna base. The azimuth pinion (14) meshes with the inner ring of the azimuth pinion bearing. The azimuth transmission assembly also includes an azimuth gear (11), an azimuth reducer (12), and an azimuth gear (13). The azimuth gear (11) is connected to the output shaft of the azimuth motor (10), the azimuth gear (13) is connected to the input shaft of the azimuth reducer (12), the azimuth gear (11) meshes with the azimuth gear (13), and the azimuth pinion (14) is connected to the output shaft of the azimuth reducer (12). The main reflector assembly (44) includes a main reflector (45), an antenna back frame (46), a left antenna plate (47), a right antenna plate (48), and an antenna shaft (49). The main reflector (45) is mounted on the antenna back frame (46), the left antenna plate (47) and the right antenna plate (48) are mounted on the antenna back frame (46), and the two ends of the antenna shaft (49) are respectively mounted on the left antenna plate (47) and the right antenna plate (48). The left antenna plate (47) and the right antenna plate (48) are both rotatably connected to the antenna turntable assembly. The pitch transmission assembly includes a pitch motor (19), a pitch reducer (20), a pitch pinion (21), an RV reducer (24), and a pitch gear (25). The pitch motor (19) is connected to the antenna turntable assembly. The output shaft of the pitch motor (19) is connected to the input shaft of the pitch reducer (20). The output shaft of the pitch reducer (20) is connected to the pitch pinion (21). The pitch pinion (21) meshes with the pitch gear (25). The pitch gear (25) is connected to the input shaft of the RV reducer (24). The output shaft of the RV reducer (24) is connected to the right side plate (48) of the antenna surface. The pitch transmission assembly also includes a left pitch shaft (28), a pitch position sensing plate (31), a pitch limiting mounting plate (32), and multiple sensors connected to the pitch limiting mounting plate (32). The left pitch shaft (28) is rotatably connected to the antenna turntable assembly and is connected to the left side plate (47) of the antenna surface. The pitch limiting mounting plate (32) is fixedly connected to the left pitch shaft (28) and the antenna turntable assembly. The pitch limiting mounting plate (32) rotates together with the left pitch shaft (28). When the pitch limiting mounting plate (32) is sensed by sensors at different positions on the pitch limiting mounting plate (32), the pitch angle of the main reflector assembly (44) can be accurately positioned. The arm assembly includes a left arm (51), a right arm (52), a reinforcing beam 1 (53), a reinforcing beam 2 (54), a left gas spring (55), and a right gas spring (56); the left arm (51) and the right arm (52) are fixed by the reinforcing beam 1 (53) and the reinforcing beam 2 (54), the left arm (51) is rotatably mounted on the left side plate (47) of the antenna surface, the right arm (52) is rotatably mounted on the right side plate (48) of the antenna surface, the left arm (51) is connected to the antenna back frame (46) by the left gas spring (55), and the right arm (52) is connected to the antenna back frame (46) by the right gas spring (56); The sub-reflector assembly (57) includes a sub-reflector support frame (58), a sub-reflector rotating plate (59), a sub-reflector conversion plate (60), a sub-reflector left side support frame (61), a sub-reflector right side support frame (62), a sub-reflector (63), a sub-reflector support connecting rod (64), an upper fixing head (65), a lower fixing head (66), and a hinged screw (67). The sub-reflector rotating plate (59) is rotatably mounted on the sub-reflector support frame (58), and the sub-reflector conversion plate (60) is fixedly mounted on the sub-reflector rotating plate (59). The sub-reflector left side support frame (61) and the sub-reflector right side support frame (62) are mounted on the sub-reflector conversion plate (60). On the sub-reflector (63), the two ends of the sub-reflector (63) are respectively mounted on the left side support frame (61) and the right side support frame (62) of the sub-reflector. The two ends of the sub-reflector support connecting rod (64) are fixed on the left side support frame (61) and the right side support frame (62) of the sub-reflector. The upper fixing head (65) is mounted on the sub-reflector support connecting rod (64), and the lower fixing head (66) is mounted on the sub-reflector (63). The hinge screw (67) connects the upper fixing head (65) and the lower fixing head (66). The hinge screw (67) can adjust the pitch angle of the sub-reflector (63).

2. The servo mechanism for a large-aperture reflective arc antenna according to claim 1, characterized in that: The left side plate (47) and the right side plate (48) are connected to limit bolts, which are located on the side of the left support arm (51) and the right support arm (52) away from the main reflector assembly (44).

3. The servo mechanism for a large-aperture reflective arc antenna according to claim 2, characterized in that: The bottom of the secondary support frame (58) is rotatably equipped with a left wheel (68) and a right wheel (69).

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