A two-dimensional radar guidance beacon structure suitable for large-aperture antenna loads

Abstract

The present invention relates to a two-dimensional radar guidance beacon structure suitable for large-aperture antenna loads. The beacon comprises a base, an inner ring frame, an outer ring frame, an inner ring reducer assembly, an outer ring reducer assembly, a cam bearing for outer ring support, an inner ring potentiometer, an outer ring potentiometer, an inner ring gyroscope, an outer ring gyroscope, and the like. The present invention shifts the outer ring support position from the traditional rotation axis to the concentric radius of the rotation axis, employing cam bearings to achieve outer ring support, thereby increasing the antenna outer ring scanning angle range and antenna aperture. Furthermore, the radial dimension of the inner ring support is minimized, allowing the antenna to be as close as possible to the antenna's rotation center, thereby increasing the antenna aperture. Finally, the transmission components and angle measurement components of the inner and outer rings are moved downward as much as possible to free up space for the installation and rotation of the antenna load.

Description

Technical Field

[0001] The invention belongs to the technical field of missile-borne weapon radar guidance and stabilization tracking, and in particular relates to a two-dimensional radar guidance position marker structure suitable for large-caliber antenna loads. Background Art

[0002] The seeker stabilization platform (also known as a position marker) is a core component of guided weapons that eliminates the effects of the carrier's disturbances on the detector's line of sight, enabling target acquisition and precision strike. The gain of a radar seeker antenna directly affects the radar's range, and the antenna aperture is the most direct and least expensive factor affecting antenna gain. The larger the antenna aperture, the greater the gain. Within a limited space, a larger radar antenna aperture requires closer proximity to the center of rotation. The antenna aperture is maximized when the antenna's radiating surface coincides with the center of rotation. However, to maintain a certain scanning range, the antenna cannot be infinitely close to the center of rotation. Therefore, the scanning range must be met first, followed by maximizing the antenna aperture.

[0003] Radar seeker supports are typically located directly below the radar antenna, unlike the structure of most optical seekers. For radar seekers, reducing the radial dimension of the inner ring support allows the antenna to be placed as close to the antenna's rotation center as possible, which helps increase the antenna's aperture. However, if the antenna is too close to the rotation center, the outer ring support structure will limit the inner ring's scanning angle.

[0004] To resolve the above contradictions and balance antenna aperture and scanning angle, the following solutions are proposed. The first is to adopt a polar coordinate structure, which converts pitch and heading motion into pitch and roll motion, and then uses an algorithm to convert the angle. The second is an arc-toothed position marker structure, the core of which is to use an arc-toothed gear as the outer ring. This shifts the outer ring support to a radius coaxial with the outer ring's rotation center, freeing up the position where the traditional support is located to make way for antenna scanning. The first solution has the problem of radar overhead scanning, and the cone angle can often only be minimized by selecting the largest possible drive motor, but the cone angle cannot be eliminated, limiting its use. In the second solution, the key component, the arc-toothed gear, is a typical U-shaped structure, which is often limited by space and weight, has poor rigidity, is easily deformed, and is difficult to process, with long processing cycles. Summary of the Invention

[0005] Technical problems to be solved

[0006] In order to avoid the shortcomings of the existing technology, the present invention provides a two-dimensional radar guidance beacon structure suitable for large-aperture antenna loads, which not only eliminates the problem of radar overhead scanning, but also greatly reduces the processing difficulty and improves production efficiency.

[0007] Technical Solution

[0008] A two-dimensional radar homing beacon structure suitable for large-aperture antenna loads, characterized in that it includes a base, an inner ring frame, an outer ring frame, an inner ring reducer assembly, an outer ring reducer assembly, an inner ring transmission gear assembly, an outer ring transmission gear assembly, an inner ring angle measurement gear, an outer ring angle measurement gear, an outer ring support cam bearing, an inner ring potentiometer, an outer ring potentiometer, an inner ring gyroscope, and an outer ring gyroscope; the outer ring frame is connected to the base through an outer ring support cam bearing; the inner ring frame is connected to the outer ring frame through a pair of ball bearings; the antenna load is fixed to the inner ring frame; the inner ring reducer assembly, the outer ring The reducer assembly is fixed on the outer ring frame and the base respectively; the inner ring transmission gear assembly and the outer ring transmission gear assembly are fixed on the inner ring frame and the outer ring frame respectively; the inner ring angle measurement gear and the outer ring angle measurement gear are fixed on the inner ring frame and the outer ring frame respectively; the inner ring potentiometer and the outer ring potentiometer are fixed on the outer ring frame and the base respectively; the inner ring gyroscope and the outer ring gyroscope are fixed on the inner ring frame and the outer ring frame respectively; the inner ring reducer assembly drives the inner ring transmission gear assembly to drive the inner ring frame to move, and the inner ring frame drives the inner ring angle measurement gear to rotate, thereby driving the inner ring potentiometer to measure the angle.

[0009] A further technical solution of the present invention is as follows: the base includes a bottom plate, a left arm and a right arm symmetrically mounted on the bottom plate, a left bracket mounted on the left arm, and a right-left bracket mounted on the right arm.

[0010] A further technical solution of the present invention is as follows: the outer ring frame includes an outer ring frame body, a left arc track and a right arc track; the inner ring transmission gear assembly and the outer ring angle measurement gear are installed on the right arc track.

[0011] Further technical solution of the present invention: the cam bearing for outer ring support includes a radial clamping cam bearing, a radial positioning cam bearing and an axial cam bearing. The radial support of the outer ring frame is achieved by 4 radial positioning cam bearings installed on the left support arm and 4 radial clamping cam bearings installed on the right support arm. The axial support of the outer ring frame is achieved by 2 axial cam bearings installed on the left bracket and 2 installed on the right bracket.

[0012] A further technical solution of the present invention is as follows: the inner ring frame is connected to the outer ring frame through a pair of ball bearings, each ball bearing is constrained in four directions, and the axial clearance of the ball bearings is eliminated by adjusting the washers; the inner ring transmission gear set and the inner ring angle measurement gear are respectively installed on both sides of the inner ring frame, and move together with the inner ring frame.

[0013] A further technical solution of the present invention is as follows: the inner ring transmission large gear assembly is composed of a first inner ring transmission gear, a second inner ring transmission gear and an inner ring transmission anti-backlash tension spring; the gear fixedly connected to the inner ring frame is the second inner ring transmission gear, and the first inner ring transmission gear is sleeved on the second inner ring transmission gear; one end of the inner ring transmission anti-backlash tension spring is installed on the first inner ring transmission gear, and the other end is installed on the second inner ring transmission gear.

[0014] A further technical solution of the present invention is as follows: the inner ring reducer assembly includes an inner ring motor, motor teeth, a large gear set, and a small gear set. One side of the small gear set is engaged with the motor teeth, and the other side is engaged with the large gear set. The other side of the large gear set is respectively engaged with the first inner ring transmission gear and the second inner ring transmission gear.

[0015] A further technical solution of the present invention is as follows: the large gear set and the small gear set are respectively composed of 4 gears. First, the first gear and the second gear are fixed together by interference pressing and inserted into the gear shaft, and then the third gear is pressed into the gear shaft by interference pressing.

[0016] A further technical solution of the present invention is that the inner ring potentiometer and the outer ring potentiometer are respectively meshed with the angle measuring gears on the inner ring frame and the outer ring frame through double-piece gears with a first-level torsion spring to eliminate backlash.

[0017] A further technical solution of the present invention also includes a drive control module, which controls the inner ring reducer assembly and the outer ring reducer assembly.

[0018] Beneficial effects

[0019] The present invention provides a two-dimensional radar homing beacon structure suitable for large-aperture antenna loads. On the one hand, the outer ring support position is moved from the traditional rotation axis to the concentric circle radius of the rotation axis, and cam bearings are used to realize the outer ring support, which is conducive to increasing the scanning angle range of the antenna outer ring; on the other hand, the radial dimension of the inner ring support is minimized, so that the antenna is as close as possible to the antenna rotation center, which is conducive to increasing the antenna aperture; finally, the transmission components and angle measurement components of the inner and outer rings are moved downward as much as possible to free up space for the installation of the antenna load. The details are as follows:

[0020] 1. Minimize the radial dimension of the inner ring support by removing the upper half of the flange edge of the inner ring bearing sleeve where the deep groove ball bearing is placed, and place the screws for fixing the inner ring bearing sleeve in the lower half of the flange edge of the bearing sleeve.

[0021] 2. The deep groove ball bearings are constrained in four directions, and the axial clearance of the bearings is eliminated by adjusting the washers. At this time, it is equivalent to a four-point contact ball bearing, which increases the support stiffness and helps improve the system gain;

[0022] 3. After the inner and outer ring reducer components are assembled into parts, the parts are installed as a whole on the outer ring frame and base; the power transmission chain adopts double-piece gear transmission, and tension springs are used to dynamically eliminate the backlash of the double-piece gears to improve the transmission rigidity;

[0023] 4. By optimizing and adjusting the gear meshing position, the inner and outer ring reducer components are arranged as close to the bottom as possible, freeing up space for the installation of large antenna loads;

[0024] 5. The inner and outer ring potentiometers eliminate the angular measurement backlash through the double-piece gears and torsion springs installed on the output shafts of the inner and outer ring potentiometers, thereby improving the angle measurement accuracy;

[0025] 6. The base and outer ring frame are processed in combination to reduce processing difficulty and improve processing efficiency.

[0026] Compared with the existing structural position markers, the structure of the present invention does not have the overhead scanning problem of polar coordinate structure position markers. The base and the outer ring frame are processed in a combined manner, which greatly reduces the processing difficulty of the arc tooth structure and improves production efficiency.

[0027] The position marker of the present invention can realize the frame angular motion range of the inner ring ±20° and the outer ring ±27° in the available space of Φ162mm, and the antenna aperture is not less than Φ150mm and the thickness is not less than 10mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0029] Figure 1 It is the front view of the present invention;

[0030] Figure 2 It is a cross-sectional view along the inner ring axis of the present invention;

[0031] Figure 3 It is a left side view of the present invention;

[0032] Figure 4 It is a partial cross-sectional view of PP of the present invention;

[0033] Figure 5 This is a cross-sectional view of the MM of the present invention;

[0034] Figure 6 Base assembly diagram;

[0035] Figure 7 Gear set installation diagram;

[0036] Figure 8 Installation diagram of inner ring transmission gear assembly;

[0037] Figure 9 The three-dimensional model diagram of the present invention: (a) left view; (b) right view;

[0038] Among them: 1-base plate; 2-left support arm; 3-right support arm; 4-left bracket; 5-right bracket; 6-outer ring frame body; 7-left arc track; 8-right arc track; 9-inner ring frame; 10-outer ring drive gear; 11-inner ring gyroscope; 12-outer ring gyroscope; 13-antenna load; 14-eccentric shaft sleeve; 15-radial clamping cam bearing; 16-radial positioning cam bearing; 17-axial cam bearing; 18-potentiometer gear clamping nut; 19-outer ring potentiometer; 20-inner ring potentiometer; 21-inner ring angle measuring gear; 22-outer ring angle measuring gear; 23-first potentiometer anti-backlash gear; 24-second potentiometer anti-backlash gear; 25-electric Position gauge gear anti-backlash torsion spring; 26-inner ring bearing sleeve; 27-inner ring bearing; 28-inner ring bearing inner ring clamping nut; 29-inner ring bearing outer ring clamping nut; 30-inner ring reducer assembly; 31-outer ring reducer assembly; 32-outer ring motor; 33-inner ring motor; 34-inner ring transmission anti-backlash tension spring; 35-first inner ring transmission gear; 36-second inner ring transmission gear; 37-large gear set; 38-small gear set; 39-motor teeth; 40-retaining ring; 41-gear shaft; 42-first gear; 43-second gear; 44-third gear; 45 drive control module; 46-base; 47-outer ring frame; 48-inner ring transmission large gear assembly. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0040] The present invention provides a two-dimensional radar guidance beacon structure suitable for large-aperture antenna loads, which mainly includes a base 46, an inner ring frame 9, an outer ring frame 47, an inner ring reducer assembly 30, an outer ring reducer assembly 31, an inner ring angle measurement gear 21, an outer ring angle measurement gear 22, an inner ring transmission gear assembly 48, an outer ring transmission gear assembly 10, cam bearings 15-17 for outer ring support, an inner ring potentiometer 20, an outer ring potentiometer 19, an inner ring gyroscope 11, an outer ring gyroscope 12, an inner ring motor 33, an outer ring motor 32, a drive control module 42, etc.

[0041] like Figure 6As shown, the base 46 is the main part of the stable platform, which is composed of five parts: bottom plate 1, left support arm 2, right support arm 3, left bracket 4 and right bracket 5. They are fixed together by positioning pins and screws and then finely processed.

[0042] The outer ring frame 47 is composed of an outer ring frame body 6, a left arc track 7 and a right arc track 8; the outer ring frame body 6, the left arc track 7 and the right arc track 8 are fixed together by positioning pins and screws, and then finely processed; the outer ring transmission gear assembly 10 and the outer ring angle measurement gear 22 are installed on the right arc track 8.

[0043] The outer ring frame 47 is supported on the base 46 by radial clamping cam bearings 15, radial positioning cam bearings 16, and axial cam bearings 17. Specifically, radial support for the outer ring frame 47 is provided by four radial positioning cam bearings 16 mounted on the left support arm 2 and four radial clamping cam bearings 15 mounted on the right support arm 3. Axial support for the outer ring frame 47 is provided by two axial cam bearings 17 mounted on the left bracket 4 and two on the right bracket 5. The upper four radial positioning cam bearings (i.e., the radial positioning cam bearings 16) serve as positioning elements, while the lower four cam bearings (i.e., the radial clamping cam bearings 15) are adjusted by an eccentric bushing 14 with a 0.5 mm eccentricity to achieve radial clamping of the outer ring frame. The two axial cam bearings 17 mounted on the left bracket 4 serve as positioning elements, and axial clamping of the outer ring frame 43 is achieved by adjusting the two axial cam bearings 17 mounted on the right bracket 5.

[0044] The inner ring frame 9 is supported on the outer ring frame 1 by a pair of deep groove ball bearings 27. Each deep groove ball bearing is constrained in four directions, and the axial clearance of the ball bearing is eliminated by adjusting the gasket; an inner ring transmission gear assembly 48 is installed on one side of the inner ring frame 9 and moves together with the inner ring frame 9.

[0045] like Figure 8 As shown, the inner ring transmission gear assembly 48 consists of a first inner ring transmission gear 35, a second inner ring transmission gear 36, and an inner ring transmission anti-backlash tension spring 34. The gear fixedly connected to the inner ring frame 9 is the second inner ring transmission gear 36, and the first inner ring transmission gear 35 is sleeved on the second inner ring transmission gear 36. The first inner ring transmission gear 35 is axially limited by a retaining ring 40, and a small axial gap is generally reserved to ensure that the first inner ring transmission gear 35 can rotate around the second inner ring transmission gear 36. The inner ring transmission anti-backlash tension spring 34 is mounted on one end of the first inner ring transmission gear 35 and on the other end of the second inner ring transmission gear 36. The structure of the outer ring transmission gear assembly is the same as that of the inner ring transmission gear assembly.

[0046] The inner ring reducer assembly 30 is composed of an inner ring motor 33, motor gears 39, a large gear set 37, a small gear set 38, etc. Figure 7 As shown, the large and small gear sets 37-38 each consist of four gears. First, the first gear 42 and the second gear 43 are pressed together by interference fit and inserted into the gear shaft 41. Then, the third gear 44 is pressed into the gear shaft 41 by interference fit. Ensure that the assembly formed by the first gear 42 and the second gear 43 is installed with clearance between the gear shaft 41 so that they can rotate relative to each other. The large gear set 37 and the small gear set 38 are meshed.

[0047] The inner ring reducer assembly 30 is mounted on the outer ring frame 47. During installation, the first inner ring transmission gear 35 in the inner ring transmission gear assembly 48 is rotated 3-4 teeth, and then the inner ring reducer assembly 30 is pushed into the correct meshing position. At this time, the gear backlash is eliminated under the action of the spring force of the inner ring transmission backlash elimination spring 34. The outer ring reducer assembly 31 is mounted on the base 46 and the installation method is the same as that for the inner ring reducer assembly 30.

[0048] The inner ring potentiometer 20 is mounted on the outer ring frame 47. The first potentiometer anti-backlash gear 23, the second potentiometer anti-backlash gear 24, the potentiometer gear anti-backlash torsion spring 25, and the potentiometer gear clamping nut 18 are mounted on the output shaft of the inner ring potentiometer 20. When installing the inner ring potentiometer, the second potentiometer anti-backlash gear 24 is rotated 4-8 teeth around the first potentiometer anti-backlash gear 23 and then pushed into the correct installation position. The gear anti-backlash is eliminated under the elastic force of the potentiometer gear anti-backlash torsion spring 25. The outer ring potentiometer 19 is mounted on the base 46 using the same installation method as the inner ring potentiometer 20.

[0049] The inner ring gyroscope 11 is mounted on the inner ring frame 9 , and the outer ring gyroscope 12 is mounted on the outer ring frame 47 .

[0050] The inner ring angle measuring gear 21 and the outer ring angle measuring gear 22 are respectively engaged with the inner ring potentiometer output shaft gear and the outer ring potentiometer output shaft gear, driving the potentiometer gears to move.

[0051] The wire harness is tied through the wire harness tying holes 46 on the base and the wire harness fixing plate installed on the base, thereby reducing the wire harness disturbance torque and making the wire harness firm, safe and beautiful.

[0052] The drive control module 45 is installed below the base 46 and is used to drive and control the position marker motor and is electrically interconnected via a multi-core socket installed on the base.

[0053] like Figure 5As shown, the motor teeth on the output shaft of the inner ring motor 33 are meshed with two gears of the small gear set 38, the other two gears of the small gear set 38 are meshed with two gears of the large gear set 37, and the other two gears of the large gear set 37 are meshed with the first inner ring transmission gear 35 and the second inner ring transmission gear 36 respectively.

[0054] Figures 1-8 The present invention shows the structure of a two-dimensional radar guidance beacon suitable for large-caliber antenna loads and the assembly and installation diagram of some components.

[0055] The first step is to sub-assemble the inner ring reducer assembly 30 and the outer ring reducer assembly 31. This is done using the large gear set 37, the small gear set 38, the corresponding housing, the cover plate, and the bearings. Adjusting washers are added to the ends of the bearings to control the axial clearance between the large gear set 37 and the small gear set 38 within an effective range.

[0056] In the second step, the base 46 is assembled by positioning the base plate 1, the left support arm 2, the right support arm 3, the left bracket 4 and the right bracket 5 by means of locating pins and connecting them with screws.

[0057] The third step is to assemble the outer ring frame 47. The outer ring frame body 6, the left arc track 7, and the right arc track 8 are positioned by positioning pins and then connected with screws. The outer ring drive gear 10 is installed on the left arc track 6.

[0058] The fourth step is to support the assembled outer ring frame 47 on the base 46 through the radial clamping cam bearing 15, the radial positioning cam bearing 16, and the axial cam bearing 17; adjust the radial clearance by rotating the eccentric sleeve 14; and adjust the axial clearance by adjusting the position of the left bracket 4.

[0059] In the fifth step, the inner ring transmission gear assembly 48 and the inner ring angle measurement gear 21 are respectively installed on the inner ring frame 9.

[0060] In the sixth step, the inner ring frame assembly formed in the fifth step is supported on the outer ring frame 47 through the inner ring bearing sleeve 26 and the inner ring bearing 27, and the bearing clearance is eliminated by adjusting the gasket, and then the inner ring bearing inner ring clamping nut 28 and the inner ring bearing outer ring clamping nut 29 are installed and tightened.

[0061] Step 6: Install the inner ring reducer assembly 30 and the outer ring reducer assembly 31.

[0062] The seventh step is to install the inner ring angle measuring potentiometer 20 and the outer ring angle measuring potentiometer 19.

[0063] The eighth step is to install the inner ring gyroscope 11 and the outer ring gyroscope 12. When installing, ensure that the gyroscope installation reference surface is close to the reference surfaces on the inner ring frame 9 and the outer ring frame 47 to ensure the accuracy of gyroscope measurement.

[0064] Step 9: Install the antenna load 3 onto the inner ring frame 9.

[0065] The tenth step is to install the drive control module 45 into the bottom of the base 46.

[0066] The motion process of the present invention's structure is as follows: the inner ring motor 33, via motor teeth 39 mounted on its output shaft, drives the small gear set 38, which in turn drives the large gear set 37, and finally the inner ring transmission large gear assembly 48, driving the inner ring frame 9 and antenna payload 13. The inner ring frame 9 then drives the inner ring angle measurement large gear 21, which in turn drives the first and second potentiometer anti-backlash gears 23 and 24 mounted on the output shaft of the inner ring potentiometer 20, ultimately driving the inner potentiometer rotor to achieve angle measurement. The outer ring's power transmission and angle measurement are similar to those of the inner ring.

[0067] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the scope of protection of the present invention.

Claims

1. A two-dimensional radar guidance beacon structure suitable for large-aperture antenna load, characterized by It includes a base, an inner ring frame, an outer ring frame, an inner ring reducer assembly, an outer ring reducer assembly, an inner ring transmission gear assembly, an outer ring transmission gear assembly, an inner ring angle measurement gear, an outer ring angle measurement gear, an outer ring support cam bearing, an inner ring potentiometer, an outer ring potentiometer, an inner ring gyroscope, and an outer ring gyroscope; the outer ring frame is connected to the base through an outer ring support cam bearing; the inner ring frame is connected to the outer ring frame through a pair of ball bearings; the antenna load is fixed to the inner ring frame; the inner ring reducer assembly and the outer ring reducer assembly are respectively fixed to the outer ring frame and On the base; the inner ring transmission gear assembly and the outer ring transmission gear assembly are fixed on the inner ring frame and the outer ring frame respectively; the inner ring angle measurement gear and the outer ring angle measurement gear are fixed on the inner ring frame and the outer ring frame respectively; the inner ring potentiometer and the outer ring potentiometer are fixed on the outer ring frame and the base respectively; the inner ring gyroscope and the outer ring gyroscope are fixed on the inner ring frame and the outer ring frame respectively; the inner ring reducer assembly drives the inner ring transmission gear assembly to drive the inner ring frame to move, and the inner ring frame drives the inner ring angle measurement gear to rotate, thereby driving the inner ring potentiometer to measure angle; The base comprises a bottom plate (1), a left support arm (2) and a right support arm (3) symmetrically mounted on the bottom plate (1), a left bracket (4) mounted on the left support arm (2), and a right bracket (5) mounted on the right support arm (3); The outer ring frame comprises an outer ring frame body (6), a left arc-shaped track (7) and a right arc-shaped track (8); an outer ring transmission gear assembly (10) and an outer ring angle measuring gear (22) are mounted on the right arc-shaped track (8); The cam bearing for outer ring support includes a radial clamping cam bearing (15), a radial positioning cam bearing (16) and an axial cam bearing (17); radial support of the outer ring frame (47) is achieved by four radial positioning cam bearings (16) mounted on the left support arm (2) and four radial clamping cam bearings (15) mounted on the right support arm (3); and axial support of the outer ring frame (47) is achieved by two axial cam bearings (17) mounted on the left bracket (4) and two mounted on the right bracket (5); The inner ring frame is connected to the outer ring frame via a pair of ball bearings, each ball bearing is constrained in four directions, and the axial clearance of the ball bearings is eliminated by adjusting washers; an inner ring transmission gear assembly (48) and an inner ring angle measurement gear (21) are respectively installed on both sides of the inner ring frame, and move together with the inner ring frame; The inner ring transmission gear assembly (48) is composed of a first inner ring transmission gear (35), a second inner ring transmission gear (36) and an inner ring transmission anti-backlash tension spring (34); the gear fixedly connected to the inner ring frame (9) is the second inner ring transmission gear (36), and the first inner ring transmission gear (35) is sleeved on the second inner ring transmission gear (36); one end of the inner ring transmission anti-backlash tension spring (34) is installed on the first inner ring transmission gear (35), and the other end is installed on the second inner ring transmission gear (36).

2. A two-dimensional radar guidance beacon structure suitable for large-aperture antenna load according to claim 1, characterized in that The inner ring reducer assembly comprises an inner ring motor (33), motor teeth (39), a large gear set (37), and a small gear set (38). One side of the small gear set (38) is meshed with the motor teeth (39), and the other side is meshed with the large gear set (37). The other side of the large gear set (37) is meshed with the first inner ring transmission gear (35) and the second inner ring transmission gear (36).

3. A two-dimensional radar guidance beacon structure suitable for large-aperture antenna load according to claim 2, characterized in that The large gear set (37) and the small gear set (38) are respectively composed of four gears. First, the first gear (42) and the second gear (43) are fixed together by interference fit and inserted into the gear shaft (41). Then, the third gear (44) is pressed into the gear shaft (41) by interference fit.

4. The two-dimensional radar guidance beacon structure suitable for large-aperture antenna load according to claim 1, characterized in that The inner ring potentiometer and the outer ring potentiometer are respectively meshed with the angle measuring gears on the inner ring frame and the outer ring frame through double-piece gears with a first-level torsion spring to eliminate backlash.

5. The two-dimensional radar guidance beacon structure suitable for large-aperture antenna load according to claim 1, characterized in that It also includes a drive control module, which controls the inner ring reducer assembly and the outer ring reducer assembly.

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