Satellite antenna transmission device capable of realizing overhead tracking

Abstract

The utility model discloses a satellite antenna transmission device capable of realizing overhead tracking, which belongs to the technical field of satellite antennas and comprises a base, an azimuth axis assembly, an inclined axis assembly and a pitch axis assembly. The azimuth axis assembly comprises an azimuth axis holder; the azimuth axis holder is rotationally connected to the base and rotates around the axis of the azimuth axis; the upper end surface of the azimuth axis holder is an inclined surface; the pitch axis assembly includes: a tilt axis holder; the inclined axis holder is rotationally connected to the inclined surface of the azimuth axis holder and rotates around an inclined axis; the antenna feeder assembly is connected with the tilt shaft holder through the pitch shaft assembly. According to the utility model, the pitching transmission angle can be increased under the condition that the overall height of the antenna is not increased or the area of the holder is not reduced, so that the pitching angle of the satellite antenna is within the range of 0-90 degrees, overhead tracking is realized, and the use requirements of the satellite antenna under various working conditions and in various regions are met.

Description

Technical Field

[0001] This utility model relates to the field of satellite antenna technology, specifically to a satellite antenna transmission device capable of over-the-top tracking. Background Technology

[0002] Existing satellite antenna transmission mainly includes azimuth transmission, elevation transmission, and polarization transmission. Azimuth and elevation transmission significantly affect the received signal strength. Due to factors such as terrain, antenna carrier, antenna placement orientation, and ground flatness, the angular range of azimuth and elevation transmission, especially the elevation transmission angle range, is crucial for the satellite antenna's functionality. Particularly in situations requiring over-the-sky tracking, the satellite antenna needs to be adjusted to a sufficient elevation angle to track satellites directly above it (at the zenith), and limiting the elevation angle range becomes a key technical challenge.

[0003] To ensure the functionality of a satellite antenna, its elevation angle (i.e., the angle between the antenna beam direction and the ground) needs to meet the requirement of 0° to 90°. However, traditional satellite antennas suffer from two problems when adjusting the elevation angle: when the satellite antenna is tilted down to a certain angle, interference from the edge of the gimbal prevents the elevation angle from reaching 0° (the angle between the antenna beam and the horizontal plane); when the satellite antenna is tilted up to a certain angle, interference from the height of the elevation assembly prevents the elevation angle from reaching 90°. These problems limit the functionality of traditional satellite antennas, especially when performing overhead tracking.

[0004] Traditional solutions include reducing the gimbal area or increasing the height of the pitch components. However, reducing the gimbal area affects the installation of the device, while increasing the height of the pitch components increases the overall height of the satellite antenna, increasing manufacturing costs and affecting the transportation and packaging of the satellite antenna. Therefore, these methods are not ideal solutions.

[0005] In summary, it is crucial to achieve the required pitch angle for satellite antennas without increasing their overall height or reducing the gimbal area. Utility Model Content

[0006] In view of this, the present invention provides a satellite antenna transmission device that can achieve over-the-top tracking, which can increase the pitch transmission angle without increasing the overall height of the antenna or reducing the gimbal area, thereby ensuring that the pitch angle of the satellite antenna is within the range of 0° to 90°, achieving over-the-top tracking while meeting the usage requirements of satellite antennas under various operating conditions and in various regions.

[0007] This utility model is achieved through the following technical solution:

[0008] A satellite antenna transmission device capable of over-the-top tracking, characterized in that it comprises: a base, an azimuth axis assembly, a tilt axis assembly, and a pitch axis assembly;

[0009] The azimuth axis assembly includes: an azimuth axis gimbal;

[0010] The azimuth axis gimbal is rotatably connected to the base and rotates around the azimuth axis; the upper surface of the azimuth axis gimbal is an inclined surface.

[0011] The pitch axis assembly includes: a tilt axis gimbal;

[0012] The tilt axis gimbal is rotatably connected to the tilt surface of the azimuth axis gimbal and rotates around the tilt axis.

[0013] The antenna feed assembly is connected to the tilt axis gimbal via the pitch axis assembly.

[0014] Furthermore, the pitch axis assembly includes: a pitch bracket, a pitch screw, and a pitch drive nut;

[0015] The pitch support and pitch screw are mounted on the tilt axis gimbal and arranged opposite to each other.

[0016] The drive mechanism of the pitch screw is hinged to the tilt axis gimbal.

[0017] The pitch transmission nut is threadedly connected to the pitch screw.

[0018] One end of the antenna feed assembly is hinged to the pitch support, and the other end of the antenna feed assembly is hinged to the pitch transmission nut.

[0019] Furthermore, a pitch encoder is provided at one end of the antenna feed assembly at the front hinge of the tilt axis gimbal.

[0020] Furthermore, the azimuth axis gimbal is supported on the base by an azimuth axis bearing and rotates around the azimuth axis under the drive of the azimuth axis drive unit.

[0021] The azimuth axis drive unit includes: a large azimuth axis gear, an azimuth axis motor assembly, and a small azimuth axis gear.

[0022] The azimuth shaft large gear is sleeved outside the azimuth shaft bearing and fixed to the base;

[0023] The azimuth axis pinion meshes with the azimuth axis gear;

[0024] The azimuth axis motor assembly is used to drive the azimuth axis pinion to rotate; the fixed end of the azimuth axis motor assembly is fixedly connected to the rear side of the azimuth axis gimbal, and the output end is coaxially fixedly connected to the azimuth axis pinion.

[0025] Furthermore, the base is provided with a trigger point a;

[0026] The azimuth axis assembly also includes: a contact switch;

[0027] The contact switch is fixed to the rear side of the azimuth axis gimbal;

[0028] When the azimuth axis gimbal rotates, and the contact switch contacts the trigger point a, the azimuth axis motor assembly is triggered to stop working.

[0029] Furthermore, the transmission device also includes: a speed reducer;

[0030] The speed reducer is mounted on the output shaft of the azimuth axis motor assembly.

[0031] Furthermore, the azimuth tilt axis gimbal is supported on the tilt surface of the azimuth gimbal by a tilt axis bearing, and rotates around the azimuth axis under the drive of the tilt axis drive unit.

[0032] The tilting shaft drive unit includes: a large tilting shaft gear, a tilting shaft motor assembly, and a small tilting shaft gear.

[0033] The large gear on the tilting shaft is fixed to the tilting surface of the azimuth gimbal.

[0034] The inclined shaft pinion meshes with the inclined shaft gear;

[0035] The tilt axis motor assembly is used to drive the tilt axis pinion to rotate; the fixed end of the tilt axis motor assembly is fixedly connected to the front side of the tilt axis gimbal, and the output end is coaxially fixedly connected to the tilt axis pinion.

[0036] Furthermore, the azimuth axis gimbal is provided with a trigger point b;

[0037] The tilting shaft assembly also includes: a contact switch;

[0038] The contact switch is fixed to the front side of the tilt axis gimbal.

[0039] When the tilt axis gimbal rotates, the contact switch contacts the trigger point b, triggering the tilt axis assembly to stop working.

[0040] Furthermore, the transmission device also includes: a speed reducer;

[0041] The speed reducer is mounted on the output shaft of the tilting shaft motor assembly.

[0042] Furthermore, the pitch screw and pitch transmission nut have T-shaped teeth.

[0043] Beneficial effects:

[0044] (1) The present invention provides a satellite antenna transmission device capable of over-the-top tracking. The antenna feed assembly is connected to the tilt axis gimbal via the pitch assembly, and the tilt axis gimbal is set on the tilt surface of the azimuth axis gimbal. The azimuth angle can be adjusted over a wide range by rotating the azimuth axis gimbal, and the pitch transmission angle can be adjusted over a wide range by rotating the tilt axis gimbal and adjusting the pitch of the pitch assembly. This avoids interference caused by the height of the pitch assembly and the edge of the gimbal on the pitch angle adjustment of the satellite antenna, so that the satellite antenna can meet the requirements of large-range satellite search and over-the-top tracking, thereby ensuring the antenna function and enabling the satellite antenna to meet the needs of different working conditions and regions.

[0045] (2) A satellite antenna transmission device capable of over-the-top tracking according to the present invention has one end of the antenna feed assembly hinged to the elevation bracket and the other end of the antenna feed assembly hinged to the elevation transmission nut. When the elevation bracket is located at the lowest point of the azimuth axis gimbal tilting surface, the antenna feed assembly can avoid interference from the edge of the gimbal and ensure that the elevation angle reaches 0°. When the elevation bracket is located at the highest point of the azimuth axis gimbal tilting surface, the antenna feed assembly can avoid interference from the height of the elevation screw and ensure that the elevation angle reaches 90°, so that the elevation angle of the satellite antenna meets the requirements of 0°~90° and achieves over-the-top tracking.

[0046] (3) A satellite antenna transmission device that can achieve over-the-top tracking is provided with a pitch encoder at the hinge point between one end of the antenna feed assembly and the front side of the tilt axis gimbal, which can measure the pitch angle of the satellite antenna.

[0047] (4) The satellite antenna transmission device of this utility model that can realize over-the-top tracking is supported by an azimuth axis gimbal and the base through an azimuth axis bearing. The hollow structure of the bearing facilitates wiring and avoids wire twisting, thereby realizing unrestricted transmission of the azimuth axis gimbal in the azimuth range of 0° to 360°.

[0048] (5) A satellite antenna transmission device of the present invention can realize over-the-top tracking. When the azimuth axis gimbal rotates and the contact switch contacts the trigger point a, the azimuth axis motor assembly is triggered to stop working, thereby realizing the positioning of the azimuth axis gimbal.

[0049] (6) A satellite antenna transmission device that can achieve over-the-top tracking according to the present invention has a reducer on the azimuth axis motor assembly. The reducer can reduce the speed of the azimuth axis motor assembly while increasing the torque, which is beneficial to further reduce the size of the transmission device.

[0050] (7) The satellite antenna transmission device of this utility model that can realize over-the-top tracking is supported by the tilt axis gimbal and the tilt axis large gear through the tilt axis bearing. The hollow structure of the bearing facilitates the wiring and avoids wire twisting, thereby realizing the unlimited transmission of the azimuth axis gimbal in the azimuth range of 0° to 360°, which is beneficial to the adjustment of the pitch transmission angle.

[0051] (8) A satellite antenna transmission device of the present invention that can realize over-the-top tracking, when the tilt axis gimbal rotates and the contact switch contacts the trigger point b, triggers the tilt axis motor assembly to stop working, thereby realizing the positioning of the tilt axis gimbal.

[0052] (9) A satellite antenna transmission device that can achieve over-the-top tracking according to the present invention has a speed reducer on the output shaft of the tilt axis motor assembly, which can reduce the speed of the tilt axis motor assembly while increasing the torque, which is beneficial to further reduce the size of the transmission device.

[0053] (10) A satellite antenna transmission device of the present invention that can achieve over-the-top tracking has a T-shaped tooth profile for the pitch screw and the pitch transmission nut, which has a self-locking function and can provide stable support for the satellite antenna. Attached Figure Description

[0054] Figure 1 This is a perspective view of a satellite antenna transmission device capable of over-the-top tracking according to the present invention.

[0055] Figure 2 This is a cross-sectional view of a satellite antenna transmission device capable of over-the-top tracking according to the present invention.

[0056] Figure 3 This is a perspective view of the azimuth axis motor assembly of a satellite antenna transmission device capable of over-the-top tracking according to this utility model.

[0057] Figure 4 This is a perspective view of a tilting shaft motor assembly of a satellite antenna transmission device capable of over-the-top tracking according to the present invention.

[0058] Among them, 1-base, 2-azimuth axis large gear, 3-azimuth axis bearing, 4-azimuth axis gimbal, 5-azimuth axis gimbal cover, 6-azimuth axis motor assembly, 7-azimuth axis small gear, 8-azimuth axis motor protective cover, 9-tilt axis large gear, 10-tilt axis bearing, 11-tilt axis gimbal, 12-contact switch, 13-tilt axis motor assembly, 14-tilt axis small gear, 15-antenna feeder assembly bracket, 16-antenna feeder assembly, 17-pitch shaft, 18-pitch encoder, 19-pitch lower support, 20-pitch upper support, 21-pitch screw, 22-pitch lower support shaft, 23-pitch transmission nut, 24-pitch screw protective cover, 25-pitch bracket. Detailed Implementation

[0059] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] This embodiment provides a satellite antenna transmission device that can achieve over-the-top tracking, including: a base 1, an azimuth axis assembly, a tilt axis assembly, and a pitch assembly.

[0061] like Figure 2 and Figure 3 As shown, the azimuth axis assembly includes: an azimuth axis bearing 3, an azimuth axis gimbal 4, and an azimuth axis drive unit;

[0062] The azimuth axis gimbal 4 is supported by the azimuth axis bearing 3, allowing for relative rotation (specifically, the outer ring of the azimuth axis bearing 3 is fixedly connected to the base 1, and its inner ring is fixedly connected to the azimuth axis gimbal 4). The azimuth axis gimbal 4 is cylindrical, and its upper end surface is an inclined surface (i.e., the upper end surface of the azimuth axis gimbal 4 forms an angle with the horizontal plane where the base 1 is located).

[0063] The azimuth axis gimbal 4 can rotate around the azimuth axis (the normal direction of the bottom surface of the azimuth axis gimbal 4) under the drive of the azimuth axis drive unit to adjust the azimuth angle.

[0064] As an example, the azimuth axis drive unit includes: azimuth axis large gear 2, azimuth axis motor assembly 6, azimuth axis small gear 7, and azimuth axis motor protective cover 8.

[0065] The azimuth axis large gear 2 is sleeved on the outside of the azimuth axis bearing 3 and fixedly connected to the base 1. The azimuth axis large gear 2 is sleeved on the azimuth axis gimbal cover 5, which is fixedly connected to the azimuth axis gimbal 4. The azimuth axis gimbal cover 5 can prevent the azimuth axis large gear 2 from being damaged by external factors.

[0066] The small gear 7 of the azimuth axis meshes with the large gear 2 of the azimuth axis.

[0067] The fixed end of the azimuth motor assembly 6 is fixedly connected to the azimuth gimbal 4, and its output end is coaxially fixedly connected to the azimuth pinion. After power is applied, the azimuth motor assembly 6 drives the azimuth pinion 7 to rotate. The azimuth pinion 7 meshes with the azimuth gear 2, causing the azimuth gimbal 4 to rotate around the azimuth axis, thereby adjusting the azimuth angle of the antenna. An azimuth motor protective cover 8 is fitted over the azimuth motor assembly 6 and the azimuth pinion 7 to prevent external damage.

[0068] like Figure 1 , Figure 2 and Figure 4 As shown, the tilt axis assembly is disposed on the tilt surface of the azimuth axis gimbal 4, and includes: tilt axis bearing 10, tilt axis gimbal 11 and tilt axis drive unit;

[0069] The tilt axis gimbal 11 is supported on the tilt surface of the azimuth axis gimbal 4 by the tilt axis bearing 10, and there is relative rotation between them; the tilt axis gimbal 11 is parallel to the tilt surface of the azimuth axis gimbal 4.

[0070] The tilt axis drive unit is used to drive the tilt axis gimbal 11 to rotate around the tilt axis (the normal direction of the tilt surface of the azimuth axis gimbal 4) to adjust the position of the pitch component, thereby cooperating with the adjustment of the pitch angle to meet the pitch angle requirements.

[0071] As an example, the tilting shaft drive unit includes: a tilting shaft large gear 9, a tilting shaft bearing 10, a tilting shaft motor assembly 13, and a tilting shaft small gear 14.

[0072] The large gear 9 of the tilting shaft is coaxially fixed to the tilting surface of the azimuth axis gimbal 4.

[0073] The inclined shaft pinion 14 meshes with the inclined shaft gear 9.

[0074] The fixed end of the tilt axis motor assembly 13 is fixed to the front side of the tilt axis gimbal 11 (i.e., Figure 2 On the left side of the azimuth axis gimbal 4, at the lowest point of the tilt surface, its output end is coaxially fixed to the tilt axis pinion 14. After being powered on, the tilt axis motor assembly 13 drives the tilt axis pinion 14 to rotate, and the tilt axis pinion 14 meshes with the tilt axis gear 9, causing the tilt axis gimbal 11 to rotate around the tilt axis.

[0075] The pitch component is mounted on the tilt axis gimbal 11.

[0076] The antenna feed assembly 16 is used for signal transmission and reception, and is supported on the pitch assembly by the antenna feed assembly bracket 15.

[0077] Specifically, the pitch assembly includes: a pitch bracket 25, a pitch encoder 18, a lower pitch support 19, an upper pitch support 20, a pitch screw 21, a lower pitch support shaft 22, a pitch transmission nut 23, a pitch screw protective cover 24, and several pitch shafts 17.

[0078] The pitch support 25 and the pitch lower support 19 are both located on the upper surface of the tilt axis gimbal 11 and are arranged opposite to each other.

[0079] The drive mechanism of the pitch screw 21 is hinged to the pitch support 19 via the pitch support shaft 22. The pitch screw 21 rotates around its own axis through the drive mechanism. As an example, the pitch screw 21 can be an electric lead screw. The drive mechanism of the electric lead screw adopts a dual output shaft, so that the pitch screw 21 can be controlled both electrically and manually.

[0080] The pitch transmission nut 23 is threadedly connected to the pitch screw 21, converting the rotation of the pitch screw 21 into linear motion along its length (i.e., when the pitch screw 21 rotates, the pitch transmission nut 23 moves linearly along the pitch screw 21).

[0081] As an example, the pitch screw 21 and the pitch transmission nut 23 have T-shaped teeth. The T-shaped teeth have a self-locking function, which can prevent the threads from loosening and ensure the stability of the threaded connection.

[0082] The pitch screw protective cover 24 is sleeved on the outside of the pitch screw 21 and fixed to the top of the pitch transmission nut 23 to protect the pitch screw 21 from external damage.

[0083] The pitch support 20 is located at one end of the antenna feeder component bracket 15; the pitch support 20 is hinged to the transmission nut 23 via the pitch pivot 17, and the other end of the antenna feeder component bracket 15 is hinged to the pitch support 25 via the pitch pivot 17.

[0084] When the pitch screw 21 rotates, it drives the pitch transmission nut 23 to move along the length of the pitch screw 21, raising or lowering one end of the antenna feed assembly 16, while the other end rotates around the pitch axis 17, thereby changing the pitch angle of the antenna feed assembly 16.

[0085] The pitch encoder 18 is fixed to the connection end between the antenna component bracket 15 and the pitch bracket 25, and reads the rotation angle of this end of the antenna component bracket 15 relative to the pitch bracket 25, thereby measuring the pitch angle of the antenna component 16.

[0086] Working principle:

[0087] Driven by the azimuth axis motor assembly 6, the azimuth axis gimbal 4 can rotate relative to the base 1, thereby achieving azimuth angle adjustment. Since the azimuth axis gimbal 4 and the base 1 are supported by the azimuth axis bearing 3, and the hollow structure of the bearing facilitates cable routing and avoids cable twisting, it can achieve unrestricted azimuth rotation from 0° to 360°, meeting the needs of star finding over a wide range of azimuth angles.

[0088] Driven by the tilt axis motor assembly 13, the tilt axis gimbal 11 can rotate freely within a range of 0° to 360° relative to the tilt surface of the azimuth axis 4, thereby adjusting the relative position of the pitch assembly and thus coordinating with the adjustment of the pitch angle. Figure 1As shown, when the pitch support 25 is located at the lowest point of the tilt surface of the azimuth axis gimbal 4, the edge of the azimuth axis gimbal 4 is avoided from limiting the pitch transmission angle (the pitch transmission angle can be increased by ±10°), so that the pitch angle of the satellite antenna can reach 0°; when the pitch support 25 is located at the highest point of the tilt surface of the azimuth axis gimbal 4, the height of the pitch screw is avoided from limiting the pitch transmission angle, so that the pitch angle of the satellite antenna can reach 90°, thereby achieving over-the-top tracking.

[0089] Example 2:

[0090] This embodiment provides a satellite antenna transmission device capable of overhead tracking. The transmission device is based on the structure in Embodiment 1, with a contact switch 12 provided in both the azimuth axis assembly and the tilt axis assembly.

[0091] The base 1 is provided with trigger point a, and the azimuth axis gimbal 4 is provided with trigger point b on its inclined surface.

[0092] In the azimuth axis assembly, contact switch 12 (hereinafter referred to as switch a) is fixedly connected to the rear side of the azimuth axis gimbal 4. The contact of switch a cooperates with trigger point a. When the contact of switch a contacts trigger point a, the azimuth axis motor assembly 6 is triggered to stop working, thereby realizing the positioning of the azimuth axis. The trigger point a serves as the zero point, thereby realizing the reset of the azimuth axis and recording the number of rotations of the azimuth axis gimbal 4.

[0093] In the tilt axis assembly, contact switch 12 (hereinafter referred to as switch b) is fixedly connected to the front side of the tilt axis gimbal 11. The contact of switch b cooperates with trigger point b. When the contact of switch b contacts trigger point b, it triggers the tilt axis motor assembly 13 to stop working, thereby positioning the tilt axis. The trigger point b serves as a zero point, thereby realizing the tilt axis reset and recording the number of rotations of the tilt axis gimbal 11.

[0094] In this embodiment, the appendix Figure 2 The initial state is defined as the state when the pitch support 25 is at the lowest point of the tilt plane of the azimuth axis gimbal 4, that is, at this time both the azimuth axis gimbal 4 and the tilt axis gimbal 11 are at zero.

[0095] Example 3:

[0096] This embodiment provides a satellite antenna transmission device capable of overhead tracking. The transmission device is based on the structure in Embodiment 1, with a speed reducer installed in both the azimuth axis assembly and the tilt axis assembly.

[0097] In the azimuth axis assembly, a speed reducer is mounted on the output shaft of the azimuth axis motor assembly 6. The speed reducer slows down the rotational speed of the output shaft of the azimuth axis motor assembly 6, allowing the azimuth axis gimbal 4 to rotate stably. At the same time, the speed reducer increases the output torque of the azimuth axis motor assembly 6, allowing the use of a smaller power motor assembly, which helps to reduce the size of the transmission device.

[0098] In the tilt axis assembly, a speed reducer is mounted on the output shaft of the tilt axis motor assembly 13. The speed reducer slows down the rotational speed of the output shaft of the tilt axis motor assembly 13, allowing the tilt axis gimbal 11 to rotate stably. At the same time, the speed reducer increases the output torque of the tilt axis motor assembly 13, allowing the selection of a smaller power motor assembly for the tilt axis motor assembly 13, which helps to reduce the size of the transmission device.

[0099] As an example, the reducer is a dual-output shaft reducer, which can be manually controlled by an external handle for the orientation axis motor assembly 6 and the orientation tilt axis motor assembly 13.

[0100] As an example, the reducer is a worm gear reducer, which can achieve a power-off self-locking function, thereby improving the stability of the azimuth axis assembly and the tilt axis assembly.

[0101] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A satellite antenna drive that enables over-the-top tracking, characterized by, Comprise: Base (1), azimuth axis assembly, tilt axis assembly, antenna feeder assembly (16) and elevation axis assembly; The azimuth axis assembly comprises an azimuth axis holder (4); The azimuth axis holder (4) is rotatably connected to the base (1) and rotates around the azimuth axis; the upper end surface of the azimuth axis holder (4) is a tilt surface; The elevation axis assembly comprises a tilt axis holder (11); The tilt axis holder (11) is rotatably connected to the tilt surface of the azimuth axis holder (4) and rotates around the tilt axis; The antenna feeder assembly (16) is connected to the tilt axis holder (11) through the elevation axis assembly.

2. A satellite antenna drive capable of over-the-top tracking as claimed in claim 1, wherein, The elevation axis assembly comprises an elevation support (25), an elevation screw (21) and an elevation transmission nut (23); The elevation support (25) and the elevation screw (21) are arranged on the tilt axis holder (11) in opposite positions; The driving mechanism of the elevation screw (21) is hinged to the tilt axis holder (11); The elevation transmission nut (23) is threadedly connected to the elevation screw (21); One end of the antenna feeder assembly (16) is hinged to the elevation support (25), and the other end of the antenna feeder assembly (16) is hinged to the elevation transmission nut (23).

3. A satellite antenna drive capable of over-the-top tracking as claimed in claim 2, wherein, One end of the antenna feeder assembly (16) is hinged to the front side of the tilt axis holder (11), and the other end is provided with an elevation encoder (18).

4. The satellite antenna drive of claim 1 wherein, The azimuth axis holder (4) is supported on the base (1) by an azimuth axis bearing (3) and rotates around the azimuth axis under the driving of an azimuth axis driving unit; The azimuth axis driving unit comprises an azimuth axis large gear (2), an azimuth axis motor assembly (6) and an azimuth axis small gear (7); The azimuth axis large gear (2) is sleeved outside the azimuth axis bearing (3) and is fixed to the base (1); The azimuth axis small gear (7) is engaged with the azimuth axis large gear (2); The azimuth axis motor assembly (6) is used to drive the azimuth axis small gear (7) to rotate; the fixed end of the azimuth axis motor assembly (6) is fixed to the rear side of the azimuth axis holder (4), and the output end is coaxially fixed to the azimuth axis small gear (7).

5. A satellite antenna drive unit capable of over-the-top tracking as defined in claim 4, wherein, A trigger point a is arranged on the base (1); The azimuth axis assembly further comprises a contact switch (12); The contact switch (12) is fixed to the rear side of the azimuth axis holder (4); When the azimuth axis holder (4) rotates and the contact of the contact switch (12) contacts the trigger point a, the azimuth axis motor assembly (6) is triggered to stop working.

6. A satellite antenna drive unit capable of over-the-top tracking as defined in claim 5, wherein Further comprising: A speed reducer; The speed reducer is arranged on the output shaft of the azimuth axis motor assembly (6).

7. The satellite antenna actuator enabling over-the-top tracking of claim 1, wherein, The tilt axis holder (11) is supported on the tilt surface of the azimuth axis holder (4) by a tilt axis bearing (10) and rotates around the tilt axis under the driving of a tilt axis driving unit; The tilt axis driving unit comprises a tilt axis large gear (9), a tilt axis motor assembly (13) and a tilt axis small gear (14); The tilt axis large gear (9) is fixed to the tilt surface of the azimuth axis holder (4); The tilt axis small gear (14) is engaged with the tilt axis large gear (9); The tilt axis small gear (14) is engaged with the tilt axis large gear (9); The tilt shaft motor assembly (13) is used to drive the tilt shaft pinion (14) to rotate; the fixed end of the tilt shaft motor assembly (13) is fixedly connected to the front side of the tilt shaft holder (11), and the output end is coaxially fixedly connected to the tilt shaft pinion (14).

8. A satellite antenna drive capable of over-the-top tracking as claimed in claim 7, wherein, The azimuth holder (4) is provided with a trigger point b; The tilt shaft assembly further comprises a contact switch (12). The contact switch (12) is fixedly connected to the front side of the tilt shaft holder (11). When the tilt shaft holder (11) rotates, the contact of the contact switch (12) contacts the trigger point b, and the tilt shaft motor assembly (13) is triggered to stop working.

9. A satellite antenna drive unit capable of over-the-top tracking as defined in claim 8, wherein, Further comprising: A speed reducer; The speed reducer is arranged on the output shaft of the tilt shaft motor assembly (13).

10. A satellite antenna drive capable of over-the-top tracking as claimed in claim 2 or 3, wherein, The tooth shape of the pitch screw (21) and the pitch transmission nut (23) is a T-shaped tooth.

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