Space-borne antenna rotating shaft device

Abstract

The utility model relates to a spaceborne antenna rotating shaft device, comprising a driving motor comprising a motor rotating shaft; the coupler is connected with a motor rotating shaft; the speed reducer is connected with the coupler and used for reducing the rotating speed of the motor rotating shaft and increasing torque; the output assembly is connected with the speed reducer and the spaceborne antenna, and the output assembly can drive the spaceborne antenna to move; and the angle feedback assembly is connected with the driving motor and the output assembly, and the angle feedback assembly is used for feeding back the first rotation angle of the driving motor and the second rotation angle of the output assembly. According to the utility model, the torque demand of the motor can be reduced and the pointing precision of the spaceborne antenna can be improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of antenna rotation shaft systems, and in particular to a satellite-borne antenna rotation shaft device. Background Art

[0002] In satellite communication systems, onboard antenna rotation axis devices play an important role. Their core function is to drive the payload antenna to rotate in one or two dimensions through their rotating axis system, so that the payload antenna can accurately point to the predetermined target direction.

[0003] Existing satellite antenna rotating shaft devices usually use a motor combined with a planetary reducer. This method may lead to excessive torque requirements for the motor and fail to provide real-time feedback on the position of the satellite antenna. The rotation accuracy of the entire rotating shaft system cannot meet the pointing requirements of the satellite antenna, resulting in low pointing accuracy of the satellite antenna. Utility Model Content

[0004] The technical problem to be solved by the present application is to provide a satellite-borne antenna shaft device, which can reduce the torque requirement of the motor and improve the pointing accuracy of the satellite-borne antenna.

[0005] The technical solution adopted by the present application to solve the above-mentioned technical problems is a satellite antenna shaft device, comprising: a drive motor, including a motor shaft; a coupling, connected to the motor shaft; a reducer, connected to the coupling, the reducer is used to reduce the speed of the motor shaft and increase the torque; an output component, respectively connected to the reducer and the satellite antenna, the output component can drive the satellite antenna to move; an angle feedback component, respectively connected to the drive motor and the output component, the angle feedback component is used to feedback a first rotation angle of the drive motor and a second rotation angle of the output component.

[0006] In one embodiment of the present application, the output assembly includes: an output shaft, a bearing, an output rotating shaft and a shaft seat. The output shaft is connected to the shaft seat through the bearing, and the output rotating shaft is respectively connected to the output shaft and the satellite antenna.

[0007] In one embodiment of the present application, the reducer is a harmonic reducer, which includes a wave generator and a flexible spline. During the rotation of the motor shaft, the motor shaft transmits power to the wave generator through the coupling and drives the flexible spline to rotate.

[0008] In one embodiment of the present application, a flange is provided on the flexspline, and the flexspline is connected to the output shaft via the flange.

[0009] In one embodiment of the present application, the bearing is a pair of angular contact bearings, and the pair of angular contact bearings are arranged back to back.

[0010] In one embodiment of the present application, the output shaft includes a hollow chamber, the bearing is arranged in the hollow chamber, and the side of the output shaft close to the output rotating shaft is stepped.

[0011] In one embodiment of the present application, the coupling includes an expansion sleeve and a pressure plate, the expansion sleeve circumferentially clamps the motor shaft, and the pressure plate presses the expansion sleeve.

[0012] In one embodiment of the present application, the angle feedback component includes a rotary transformer, and the rotary transformer is connected to the drive motor.

[0013] In one embodiment of the present application, the angle feedback assembly includes a Hall sensor and a magnet, the Hall sensor is connected to the shaft seat, and the magnet is connected to the output shaft.

[0014] In one embodiment of the present application, the satellite-borne antenna includes an antenna rotating arm and an antenna mounting base, and the output component is connected to the antenna rotating arm through the antenna mounting base.

[0015] The technical solution of the present application provides the original power for driving the movement of the satellite-borne antenna through a driving motor; considering that the satellite-borne antenna is usually in a zero-gravity environment and the acceleration is very small, the required torque only needs to consider the inertia moment of the load and the friction torque of the shaft system. Therefore, the present application reduces the torque requirement of the driving motor through the large deceleration feature of the reducer, and can use a motor with very small torque output to drive a mechanism with a large inertia requirement, thereby achieving high-load, high-precision low-backlash output, thereby improving the pointing accuracy of the satellite-borne antenna; the reducer can adopt a harmonic reducer, which can further reduce the weight of the entire shaft system; the error accumulation on the overall transmission path of the shaft system of the present application is small, and by setting an angle feedback component, the rotation angle of the shaft system end and the input end can be compared, and the angle of the input end can be calibrated as needed, thereby achieving closed-loop control of the rotation angle of the entire shaft system.

[0016] This application utilizes an innovative combination of a reducer and angle feedback assembly, resulting in a large reduction ratio, low motor torque requirements, real-time feedback of satellite antenna position information, and the ability to perform zero-position calibration at any time, all while maintaining a relatively low overall weight and cost. This application optimizes the cost, accuracy, real-time feedback, and reliability of a high-pointing-precision satellite antenna shaft while maintaining a lightweight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to make the above-mentioned objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a schematic structural diagram of a satellite-borne antenna shaft device according to an embodiment of the present application;

[0019] Figure 2This is a partial exploded view of a rotating shaft device for a satellite-borne antenna in one embodiment of the present application;

[0020] Figure 3 It is a partial cross-sectional view of a rotating shaft device of a satellite-borne antenna in one embodiment of the present application;

[0021] Figure 4 is a cross-sectional view of a drive motor and a coupling in one embodiment of the present application;

[0022] Figure 5 is a schematic diagram of a flexible spline and a flange in one embodiment of the present application;

[0023] Figure 6 is a schematic diagram of a bearing and an output shaft in one embodiment of the present application;

[0024] Figure 7 It is a cross-sectional view of a bearing and an output shaft in one embodiment of the present application.

[0025] Description of the accompanying drawings in the specific embodiment:

[0026] 100. Satellite antenna shaft assembly; 110. Drive motor; 1101. Motor shaft; 120. Coupling; 1201. Expansion sleeve; 1202. Pressure plate; 130. Reducer; 1301. Wave generator; 1302. Flexspline; 1303. Flange; 140. Output assembly; 1401. Output shaft; 1402. Bearing; 1403. Output shaft; 1404. Shaft seat; 1405. Bearing end fixing surface; 150. Satellite antenna; 1501. Antenna rotating arm; 1502. Antenna mounting base; 1503. Fixing flange; 160. Angle feedback assembly; 1601. Rotary transformer; 1602. Hall sensor. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objectives, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] As used in this application and the claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not intended to refer to the singular but may include the plural. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements.

[0030] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0031] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0032] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is solely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. Furthermore, while the terms used in this application are selected from commonly known and commonly used terms, some terms mentioned in this specification may have been selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant sections of this description. Furthermore, this application should be understood not only by the actual terms used, but also by the meaning implied by each term.

[0033] The following describes the embodiments of the present application based on the accompanying drawings. However, the embodiments shown below are examples of satellite antenna pivot devices for embodying the technical ideas of the present application, and the satellite antenna pivot devices of the present application are not specifically the following contents. Furthermore, in order to facilitate the understanding of the scope of the claims, this specification assigns numbers corresponding to the components shown in the embodiments to the components shown in the "Claims" and "Utility Model Contents" columns. However, the components shown in the claims are by no means specific to the components of the embodiments. In particular, the dimensions, materials, shapes, and relative configurations of the constituent components described in the embodiments, unless specifically described, are not intended to limit the scope of the present application to these, and are merely illustrative examples.

[0034] However, the dimensions or positional relationships of the components shown in the drawings are sometimes exaggerated for the purpose of clarifying the description. Furthermore, in the following description, for components that are identical or homogeneous, the same name or symbol indicates that its detailed description will be omitted as appropriate. Furthermore, the various elements constituting the present application may be in the form of multiple elements being constituted by the same component so that one component serves as multiple elements, or conversely, multiple components sharing the function of one component. In addition, the contents described in some embodiments and implementation methods may also be utilized in other embodiments, implementation methods, etc. In addition, in this specification, "on" is not limited to the case where it is formed in contact with the upper surface, but also includes the case where it is formed separately above, and is also used to include the meaning of the presence of an intervening layer between layers.

[0035] The present application proposes a satellite-borne antenna rotation axis device, which can be used in a space environment with no gravity, very small acceleration, and weight sensitivity. The satellite-borne antenna rotation axis device can serve as the axis system of a large-diameter rotatable satellite antenna.

[0036] Figure 1 This is a schematic structural diagram of a satellite antenna shaft device according to an embodiment of the present application. Figure 2 This is a partial exploded view of the satellite antenna shaft device in one embodiment of the present application. Figure 1 and Figure 2 As shown, the satellite antenna shaft device 100 of this embodiment includes: a driving motor 110, including a motor shaft 1101; a coupling 120, connected to the motor shaft 1101; a reducer 130, connected to the coupling 120, and the reducer 130 is used to reduce the speed of the motor shaft 1101 and increase the torque; an output component 140, respectively connected to the reducer 130 and the satellite antenna 150, and the output component 140 can drive the satellite antenna 150 to move; an angle feedback component 160, respectively connected to the driving motor 110 and the output component 140, and the angle feedback component 160 is used to feedback a first rotation angle of the driving motor 110 and a second rotation angle of the output component 140.

[0037] For example, continue to refer to Figure 1 and Figure 2 As shown, the structure of the satellite antenna shaft device 100 is, from left to right,: a rotary transformer 1601, a drive motor 110, a coupling 120, a reducer 130 (e.g., a harmonic reducer), an output component 140, a Hall sensor 1602, and a satellite antenna 150. The rotary transformer 1601 is connected to the drive motor 110 and can feedback the first rotation angle of the drive motor 110. The Hall sensor 1602 is connected to the output component 140 and can calibrate the rotation angle fed back by the rotary transformer 1601 and obtain the zero position of the second rotation angle. The drive motor 110 serves as the input end of the force, and the output component 140 serves as the output end of the force. The output shaft 1403 of the output component 140 can drive the satellite antenna 150 to rotate together.

[0038] The technical solution of the present application provides the original power for driving the satellite antenna 150 through the drive motor 110; considering that the satellite antenna 150 is usually in a zero-gravity environment and the acceleration is very small, the required torque only needs to consider the inertia moment of the load and the friction torque of the shaft system. Therefore, the present application reduces the torque requirement of the drive motor 110 through the large deceleration feature of the reducer 130, and can use a motor with very small torque output to drive a mechanism with a large inertia requirement, thereby achieving high-load, high-precision, low-backlash output, thereby improving the pointing accuracy of the satellite antenna 150; the reducer 130 can adopt a harmonic reducer, which can further reduce the weight of the entire shaft system; the error accumulation on the overall transmission path of the shaft system of the present application is small. By setting an angle feedback component 160 (such as a rotary transformer 1601 and a Hall sensor 1602), the rotation angle of the shaft system end and the input end can be compared, and the angle of the input end can be calibrated as needed, thereby achieving closed-loop control of the rotation angle of the entire shaft system.

[0039] This application utilizes an innovative combination of a reducer 130 and an angle feedback assembly 160, resulting in a large reduction ratio, low motor torque requirements, real-time feedback of the position of the satellite antenna 150, and the ability to perform zero-position calibration at any time, all while maintaining a relatively low overall weight and cost. This application optimizes the cost, accuracy, real-time feedback, and reliability of a high-pointing-precision satellite antenna shaft while maintaining a lightweight design.

[0040] refer to Figure 1 and Figure 2As shown, in some embodiments, the output assembly 140 includes: an output shaft 1401, a bearing 1402, an output rotating shaft 1403, and a shaft seat 1404. The output shaft 1401 is fixedly connected to the shaft seat 1404 via the bearing 1402, and the output rotating shaft 1403 is respectively connected to the output shaft 1401 and the satellite antenna 150. For example, the output shaft 1401 is equivalent to the output shaft seat, the shaft seat 1404 is equivalent to the output seat flange surface, and the output assembly 140 is equivalent to the output end shaft. This configuration of the present application can achieve stable connection and rotational support between the output shaft 1401 and the satellite antenna 150.

[0041] Figure 4 is a cross-sectional view of a drive motor and a coupling in one embodiment of the present application, Figure 5 Schematic diagram of the flexible wheel and flange in one embodiment of the present application. Figure 2 、 Figure 4 and Figure 5 As shown, in some embodiments, the reducer 130 is a harmonic reducer, which includes a wave generator 1301 and a flexible spline 1302; during the rotation of the motor shaft 1101, the motor shaft 1101 transmits power to the wave generator 1301 through the coupling 120 and drives the flexible spline 1302 to rotate, and the output is amplified through the flexible spline 1302 to amplify the motor input torque and holding torque.

[0042] For example, a harmonic reducer utilizes a staggered tooth principle, featuring small backlash (not shown) and multi-tooth meshing, enabling high-load, high-precision, low-backlash output. In practical applications, a Type 14 harmonic reducer can achieve a reduction ratio of 100:1 or higher while weighing only 100g, achieving a high reduction ratio with a low weight.

[0043] This application utilizes the high deceleration characteristics of the harmonic reducer to reduce the torque requirements of the motor. When the rated output of the input drive motor 110 is 50mNm (millinewton-meters), the harmonic reduction ratio is 100:1, and the transmission efficiency at room temperature is 75%, the output torque is 50*100*0.75*1.0e-3=3.75Nm. Because the satellite antenna 150 is typically in a zero-gravity environment and has very low acceleration, the required torque only needs to consider the load's moment of inertia and the shaft friction torque. Therefore, this application adopts this solution to use a motor with very low torque output to drive a mechanism with a large inertia requirement.

[0044] refer to Figure 5As shown, in some embodiments, a flange 1303 is provided on the flexspline 1302. The flexspline 1302 and the flange 1303 can be integrally provided, and the flexspline 1302 is connected to the output shaft 1401 via the flange 1303. For example, the output end of the flexspline 1302 can be configured to have a flange with a diameter of 23 mm. When the output is 3.75 Nm, the torsional deformation of the output shaft 1401 can be negligible.

[0045] Figure 3 is a partial cross-sectional view of a satellite antenna shaft device according to an embodiment of the present application. Figure 6 is a schematic diagram of a bearing and an output shaft in one embodiment of the present application, Figure 7 This is a cross-sectional view of the bearing and the output shaft in one embodiment of the present application. Figure 3 、 Figure 6 and Figure 7 As shown, in some embodiments, the bearing 1402 is a pair of angular contact bearings, and the pair of angular contact bearings are arranged back to back.

[0046] For example, Figure 2 As shown, output shaft 1401 is secured to shaft seat 1404 by a pair of angular contact bearings. Angular contact bearings 1402 ensure the accuracy and coaxiality of harmonic output. Angular contact bearings 1402 have a constant contact angle, ensuring stable axial and radial output when used in a back-to-back pair. Furthermore, the pressure points of the two bearings 1402 are greater than the distance between their center points, ensuring greater shafting rigidity.

[0047] refer to Figure 2 、 Figure 6 and Figure 7 As shown, in some embodiments, the output shaft 1401 includes a hollow chamber (not shown), the bearing 1402 is disposed within the hollow chamber, and the side of the output shaft 1401 near the output rotating shaft 1403 is stepped. For example, the output shaft 1401 can be designed with a continuous hollow outer frame to reduce the step at the end of the output shaft 1401. By reducing the distance between the output shaft 1401 and the bearing end fixing surface 1405, the torsional resistance of the output shaft 1401 can be improved, and deformation under load can be ignored.

[0048] refer to Figure 2 and Figure 4 As shown, in some embodiments, coupling 120 includes an expansion sleeve 1201 and a pressure plate 1202. Expansion sleeve 1201 circumferentially clamps motor shaft 1101, while pressure plate 1202 compresses expansion sleeve 1201. For example, this application utilizes a small-angle expansion sleeve 1201 to replace a traditional coupling design. Because expansion sleeve 1201 circumferentially clamps and applies force evenly, it ensures the coaxiality of wave generator 1301 and output shaft 1401, facilitating high-precision output of flexspline 1302 and extending its service life.

[0049] refer to Figure 2 As shown, in some embodiments, the angle feedback component 160 includes a rotary transformer 1601, which is connected to the drive motor 110. For example, the rotary transformer 1601 and the drive motor 110 can be integrated, with the drive motor 110 serving as the force input, and the rotary transformer 1601 providing high-precision, real-time feedback on the rotation angle of the drive motor 110.

[0050] Continue to refer Figure 2 As shown, in some embodiments, the angle feedback assembly 160 includes a Hall sensor 1602 and a magnet (not shown), wherein the Hall sensor 1602 is connected to the shaft seat 1404, and the magnet is connected to the output shaft 1403. For example, the present application adopts a design of zero-position calibration of the Hall sensor 1602 and the magnet at the output end of the shaft system, wherein the magnet is mounted on the output shaft 1403 and the Hall sensor 1602 is mounted on the shaft seat 1404, thereby being able to feedback the rotation angle of the shaft and the fixed end of the shaft mechanism at the final output.

[0051] For example, the error accumulation on the overall transmission path of the shaft system of the present application is extremely small, so the angle measuring rotary transformer 1601 can be installed at the input end, and the reducer 130 can be used to greatly improve the angle measurement accuracy; the output end uses a Hall sensor 1602 to detect the rotation angle of the output shaft 1403 relative to the mechanism mounting surface, and the input end can be angularly calibrated by comparing the positions of the end and the input end, thereby achieving closed-loop control of the rotation angle of the entire shaft system.

[0052] refer to Figure 1 As shown, in some embodiments, the satellite antenna 150 includes an antenna rotating arm 1501 and an antenna mounting base 1502, and the output assembly 140 is connected to the antenna rotating arm 1501 through the antenna mounting base 1502. For example, a fixing flange 1503 can also be provided between the output shaft 1401 and the antenna mounting base 1502, so that the stability of the connection can be enhanced. In actual applications, the shaft system can be installed on the mounting base of the antenna and the warehouse plate through an adapter plate, and the antenna rotating arm 1501 can be connected through the coupling 120, so as to achieve the purpose of driving the antenna rotating arm 1501 to rotate with high precision. The present application adopts a series of designs that are conducive to improving the overall output accuracy of the shaft system and reducing the transmission error of the entire shaft.

[0053] This application has conducted some tests, and these tests show that this application has the following characteristics: (1) High feedback accuracy: Under normal circumstances, the rotation accuracy of the satellite antenna is about 3'. This application uses a single-channel rotary transformer with an angular measurement accuracy of ±15'. After deceleration, the angular measurement accuracy of the output end can reach ±9", which fully meets the high-precision requirements. (2) Closed-loop control: The rotary transformer is used to output the rotation angle information in real time, and a Hall sensor is set at the end of the shaft system to detect the accumulation of zero-position correction errors. (3) Weight control: Under the conditions of 3Nm torque and 3' accuracy output, the overall weight of the shaft system of this application is less than 500g. (4) Through reasonable selection and matching, the performance requirements of each component can be reduced, and the low cost of the final solution can be achieved.

[0054] Although the above disclosure discusses some currently believed useful utility model embodiments through various examples, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the spirit and scope of the embodiments of the application. For example, although the system components described above can be implemented using hardware devices, they can also be implemented using software solutions, such as installing the described system on an existing server or mobile device.

[0055] Similarly, it should be noted that, in order to simplify the description of the present disclosure and thus facilitate understanding of one or more utility model embodiments, the foregoing description of the present embodiment sometimes combines multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of the present application requires more features than those recited in the claims. In fact, the features of an embodiment may be fewer than the total features of a single embodiment disclosed above.

[0056] In some embodiments, numbers are used to describe the quantity of components and attributes. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise stated, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the description and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the settings of such numerical values ​​are as accurate as possible within the feasible range.

[0057] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A satellite antenna shaft device, characterized in that: include: a drive motor, including a motor shaft; a coupling connected to the motor shaft; a reducer connected to the coupling, the reducer being used to reduce the rotation speed of the motor shaft and increase the torque; an output component, connected to the reducer and the satellite-borne antenna respectively, and capable of driving the satellite-borne antenna to move; An angle feedback component is connected to the drive motor and the output component respectively, and the angle feedback component is used to feed back a first rotation angle of the drive motor and a second rotation angle of the output component.

2. The satellite antenna shaft device according to claim 1, wherein: The output assembly includes: an output shaft, a bearing, an output rotating shaft and a shaft seat. The output shaft is connected to the shaft seat through the bearing, and the output rotating shaft is connected to the output shaft and the satellite antenna respectively.

3. The satellite antenna shaft device according to claim 2, wherein: The reducer is a harmonic reducer, which includes a wave generator and a flexible spline. During the rotation of the motor shaft, the motor shaft transmits power to the wave generator through the coupling and drives the flexible spline to rotate.

4. The satellite antenna rotating shaft device according to claim 3, wherein: The flexible spline is provided with a flange, and the flexible spline is connected to the output shaft through the flange.

5. The satellite antenna rotating shaft device according to claim 2, wherein: The bearings are a pair of angular contact bearings, and the pair of angular contact bearings are arranged back to back.

6. The satellite antenna shaft device according to claim 2, wherein: The output shaft includes a hollow chamber, the bearing is arranged in the hollow chamber, and a side of the output shaft close to the output rotating shaft is stepped.

7. The satellite antenna rotating shaft device according to claim 1, wherein: The coupling includes an expansion sleeve and a pressure plate. The expansion sleeve circumferentially clamps the motor shaft, and the pressure plate presses the expansion sleeve.

8. The satellite antenna rotating shaft device according to claim 1, wherein: The angle feedback component includes a rotary transformer, and the rotary transformer is connected to the drive motor.

9. The satellite antenna rotating shaft device according to claim 2, wherein: The angle feedback component includes a Hall sensor and a magnet. The Hall sensor is connected to the shaft seat, and the magnet is connected to the output shaft.

10. The satellite antenna shaft device according to claim 1, wherein: The satellite-borne antenna comprises an antenna rotating arm and an antenna mounting seat, and the output assembly is connected to the antenna rotating arm via the antenna mounting seat.

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