A synchronous pitch drive mechanism for dual-frequency communication-in-motion antenna

Abstract

The present invention discloses a dual-frequency mobile communication antenna pitch synchronous driving mechanism, comprising: an azimuth rotating platform and a motor, an arm is arranged on the azimuth rotating platform, a first axis and a second axis are rotatably arranged on the arm, the first axis is parallel to the second axis, a Ku flat-plate antenna is rotatably arranged on the first axis, a Ka flat-plate antenna is rotatably arranged on the second axis, and the Ku flat-plate antenna is perpendicular to the aperture of the Ka flat-plate antenna; the motor and encoder combination are directly or indirectly assembled on the arm, the main shaft of the motor is simultaneously connected to the Ku flat-plate antenna and the Ka flat-plate antenna, and the transmission ratio is equal. The dual-frequency mobile communication antenna pitch synchronous driving mechanism of the present invention shortens the adjustment time, improves the adjustment accuracy, simplifies the adjustment mechanism, reduces the mechanism size, and reduces the mechanism weight.

Description

Technical Field

[0001] The invention belongs to the field of satellite communication equipment, and in particular relates to a dual-frequency communication-in-motion antenna pitch synchronization driving mechanism. Background Art

[0002] With the rapid development of modern satellite communication technology, the application of dual-frequency satellite antennas in motion is becoming more and more extensive. In order to ensure that the antenna tracks the target satellite and establishes a stable satellite link. The servo tracking structure transmission system must be stable and reliable. In order to ensure good tracking accuracy, the backlash on the transmission chain must be reduced as much as possible; for the gear transmission chain, the tooth side clearance must be adjusted. For dual-frequency Ku / Ka flat antennas, under normal circumstances, the Ku antenna and the Ka antenna do not need to work at the same time. The general solution is that the two antenna surfaces are arranged in the same direction, but in order to avoid beam blocking and pitch rotation interference, the pitch axes of the two antennas must be pulled apart by a certain distance, and generally there will be a certain height difference; for the drive system, two sets of drives are generally used to work independently or a single set of linkage is used, but the single drive form The transmission chain must be made very long, which has many disadvantages for the overall stability of the system, transmission accuracy, overall height, installation area occupied by the overall machine, overall weight, and cost. Summary of the invention

[0003] In view of this, an object of the present invention is to overcome the above problems or at least partially solve or alleviate the above problems.

[0004] The present invention provides a dual-frequency communication-in-motion antenna pitch synchronization driving mechanism, comprising:

[0005] An azimuth rotating platform, wherein an arm is provided on the azimuth rotating platform, a first axis and a second axis are rotatably provided on the arm, the first axis is parallel to the second axis, a Ku flat-plate antenna is rotatably provided on the first axis, a Ka flat-plate antenna is rotatably provided on the second axis, and the Ku flat-plate antenna is perpendicular to the aperture of the Ka flat-plate antenna; and

[0006] A motor and encoder combination, wherein the motor and encoder combination is directly or indirectly mounted on the support arm, and the main shaft of the motor and encoder combination is simultaneously transmission-connected with the Ku flat antenna and the Ka flat antenna, and the transmission ratio is equal.

[0007] The synchronous pitch drive mechanism of the dual-frequency communication-in-motion antenna of the present invention also has the following optional features.

[0008] Optionally, a driving gear is provided on the main shaft of the motor and encoder combination, a first passive gear is rotatably provided on the first shaft, the first passive gear is coaxially fixedly connected to the Ku flat antenna, a second passive gear is rotatably provided on the second shaft, the second passive gear is coaxially fixedly connected to the Ka flat antenna, and the driving gear is respectively meshed with the first passive gear and the second passive gear at the same time.

[0009] Optionally, a first lug is rotatably provided on the first rotating shaft, and the Ku flat antenna is fixed on the first lug; a second lug is provided on the second rotating shaft, and the Ka flat antenna is fixed on the second lug.

[0010] Optionally, the first passive gear and the second passive gear are both sector gears, the center of gravity of the first passive gear and the Ku flat antenna is distributed on one side of the first rotating shaft, and the center of gravity of the second passive gear and the Ka flat antenna is distributed on the other side of the second rotating shaft.

[0011] Optionally, a first limiting long hole is provided on the first passive gear, a second limiting long hole is provided on the second passive gear, two limiting screws are provided on the support arm, and the two limiting screws extend into the first limiting long hole and the second limiting long hole respectively.

[0012] Optionally, it also includes a motor and encoder combination seat, the lower end of which is fixedly connected to the azimuth rotating platform, and the motor and encoder combination seat is provided with a plurality of vertical long holes, and is fixedly connected to the motor and encoder combination through connecting parts passing through the vertical long holes.

[0013] Optionally, an adjustment plate is further included, and the end of the main shaft of the motor and encoder combination cooperates with the adjustment plate through a bearing, and the adjustment plate is directly or indirectly connected to the support arm.

[0014] Optionally, a transverse plate is provided on the support arm, a through hole and a screw hole are provided on the transverse plate, a screw corresponding to the through hole is provided on the upper end of the adjustment plate, an upward adjustment screw is provided in the through hole, the upward adjustment screw passes through the through hole and is screwed into the screw hole on the adjustment plate, a downward adjustment screw is assembled in the screw hole on the transverse plate, and the lower end of the downward adjustment screw is pressed against the upper end surface of the transverse plate.

[0015] The dual-frequency mobile antenna pitch synchronous driving mechanism of the present invention adopts the Ku flat-panel antenna and the Ka flat-panel antenna to be arranged back to back, which reduces the overall height of the mobile antenna and reduces the height of the center of mass of the antenna to a certain extent. The other two antenna surfaces are respectively on both sides of the azimuth rotation center, achieving the purpose of balancing each other, and the center of mass is closer to the azimuth rotation center of the antenna, reducing the eccentric rotational inertia and reducing the probability of rollover when the vehicle body turns. The main shaft of the motor and encoder combination is connected to the Ku flat-panel antenna and the Ka flat-panel antenna at the same transmission ratio at the same time. The motor and encoder combination can drive the Ku flat-panel antenna and the Ka flat-panel antenna at the same time, and the two antenna surfaces are perpendicular to each other, solving the problem of mutual shielding of the same-direction surfaces, and also reducing the height of the antenna to a certain extent, which can greatly reduce the roof space required for the overall installation of the antenna, so that the antenna can be installed on a variety of vehicles without being too wide or too limited, and has a wider adaptability.

[0016] Furthermore, the pitch synchronous driving mechanism of the dual-band mobile communication antenna of the present invention solves the simultaneous synchronous driving of the dual-band antenna through a set of driving systems, reduces a set of driving systems, simplifies the adjustment mechanism, reduces the weight of the entire antenna driving mechanism, and improves system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the external structure of the pitch synchronization driving mechanism of the dual-frequency communication-in-motion antenna of the present invention;

[0019] Figure 2 It is a schematic diagram of the external structure of the pitch synchronization driving mechanism of the dual-frequency communication-in-motion antenna of the present invention in another angle state;

[0020] Figure 3 It is a rear view structural schematic diagram of the pitch synchronization driving mechanism of the dual-frequency communication-in-motion antenna of the present invention;

[0021] Figure 4 yes Figure 3 A side cross-sectional view of .

[0022] In the above figure: 1 azimuth rotary platform; 2 support arm; 201 horizontal plate; 3 first axis; 301 first support ear; 4 second axis; 401 second support ear; 5Ku flat antenna; 6Ka flat antenna; 7 adjustment plate; 8 motor and encoder combination; 9 driving gear; 10 first passive gear; 11 second passive gear; 12 first limit long hole; 13 second limit long hole; 14 limit screw; 15 motor and encoder combination seat. DETAILED DESCRIPTION

[0023] refer to Figure 1 and Figure 2 The present invention is an embodiment of a dual-frequency mobile communication antenna pitch synchronous driving mechanism, comprising: an azimuth rotating platform 1 and a motor and encoder combination 8, the azimuth rotating platform 1 is provided with a support arm 2, the support arm 2 is rotatably provided with a first axis 3 and a second axis 4, the first axis 3 is parallel to the second axis 4, a Ku flat-plate antenna 5 is rotatably provided on the first axis 3, a Ka flat-plate antenna 6 is rotatably provided on the second axis 4, and the apertures of the Ku flat-plate antenna 5 and the Ka flat-plate antenna 6 are perpendicular to each other; the motor and encoder combination 8 is directly or indirectly mounted on the support arm 2, the main shaft of the motor and encoder combination 8 is simultaneously connected to the Ku flat-plate antenna 5 and the Ka flat-plate antenna 6 by transmission, and the transmission ratio is equal, when the motor and encoder combination 8 drives the Ku flat-plate antenna 5 to rotate, the Ka flat-plate antenna 6 also rotates in the same direction at the same time, during the use of the Ku flat-plate antenna and the Ka flat-plate antenna, when the Ku flat-plate antenna needs to be aligned with the satellite, the Ku flat-plate aperture rotates to the front; when the Ka flat-plate antenna needs to be aligned with the satellite, the Ka flat-plate aperture rotates to the front, and the Ku flat-plate antenna and the Ka flat-plate antenna aperture are always in a vertical state.

[0024] refer to Figure 1 and Figure 2 According to an embodiment of the present invention, a driving gear 9 is provided on the main shaft of the motor and encoder combination 8, a first passive gear 10 is rotatably provided on the first shaft 3, the first passive gear 10 is coaxially fixedly connected with the Ku flat antenna 5, a second passive gear 11 is rotatably provided on the second shaft 4, the second passive gear 11 is coaxially fixedly connected with the Ka flat antenna 6, and the driving gear 9 is simultaneously meshed with the first passive gear 10 and the second passive gear 11. When the motor and encoder combination 8 drives the first passive gear 10 and the second gear 11 to rotate synchronously through the driving gear 9, the Ku flat antenna 5 and the Ka flat antenna 6 both rotate simultaneously.

[0025] refer to Figure 1 and Figure 2 According to an embodiment of the present invention, a first lug 301 is rotatably provided on the first rotating shaft 3, the Ku flat antenna 5 is fixed on the first lug 301, the first passive gear 11 is fixedly connected to the first lug 301 and can rotate synchronously, a second lug 401 is provided on the second rotating shaft 4, the Ka flat antenna 6 is fixed on the second lug 401, and the second passive gear 12 is fixedly connected to the second lug 401 and can rotate synchronously.

[0026] refer to Figure 1 and Figure 2According to an embodiment of the present invention, the first passive gear 10 and the second passive gear 11 are both fan-shaped gears, and the center of gravity of the first passive gear 10 and the center of gravity of the Ku flat antenna 5 are distributed on both sides of the first rotating shaft 3, which can effectively reduce the eccentricity of the Ku flat antenna 5 and the first passive gear 10 during rotation; the center of gravity of the second passive gear 11 and the center of gravity of the Ka flat antenna 6 are distributed on both sides of the second rotating shaft 4, which can effectively reduce the eccentricity of the Ka flat antenna 6 and the second passive gear 11 during rotation; the Ku flat antenna and the Ka flat antenna are balanced with each other, effectively reducing the torque required for the driving gear 9 to drive the first passive gear 10 and the second passive gear 11.

[0027] refer to Figure 1 According to an embodiment of the present invention, a first limiting long hole 12 is provided on the first passive gear 10, a second limiting long hole 13 is provided on the second passive gear 11, and two limiting screws 14 are provided on the support arm 2, and the two limiting screws 14 extend into the first limiting long hole 12 and the second limiting long hole 13 respectively. When the first passive gear 10 and the second passive gear 11 rotate, the first limiting long hole 12 and the second limiting long hole 13 rotate along with the first passive gear 10 and the second passive gear 11 respectively, until one end of the first limiting long hole 12 or the second limiting long hole 13 contacts the limiting-related screw 14, the first passive gear 10 or the second passive gear will be stopped by the screw 14, and then stop rotating.

[0028] refer to Figure 3 and Figure 4 According to an embodiment of the present invention, it further comprises a motor and encoder assembly seat 15, the lower end of which is fixedly connected to the azimuth rotary platform 1, and a plurality of vertical long holes are provided on the motor and encoder assembly seat 15, and the motor and encoder assembly seat 15 is fixedly connected to the motor and encoder assembly 8 through a connecting piece passing through the vertical long holes. By adjusting the up and down position of the connecting piece on the motor and encoder assembly 8 in the vertical long holes, the up and down displacement of the driving gear 9 on the main shaft of the motor and encoder assembly 8 can be adjusted, and then the meshing clearance between the driving gear 9 and the first passive gear 10 and the second passive gear 11 meshing therewith can be adjusted.

[0029] refer to Figure 4According to an embodiment of the present invention, it also includes an adjusting plate 7, the end of the main shaft of the motor and encoder combination 8 cooperates with the adjusting plate 7 through a bearing, a plurality of vertical long holes are arranged on the adjusting plate 7, and the surface of the vertical long holes and the support arm 2 are connected by a connecting piece, and a transverse plate 201 is also arranged on the support arm 2, and a through hole and two screw holes are arranged on the transverse plate 201, and the two screw holes are symmetrically arranged on both sides of a through hole, and two screws corresponding to the two through holes are arranged on the upper end of the adjusting plate 7, and an upward adjustment screw is arranged in the through hole, and the upward adjustment screw passes downward through the through hole and is screwed into the screw hole on the adjusting plate 7, and a downward adjustment screw is assembled in the screw hole on the transverse plate 201, and the lower end of the downward adjustment screw is against the upper end surface of the transverse plate 201. When the active gear 9 needs to move upward, loosen the lower adjustment screw and tighten the upper adjustment screw at the same time. The upper adjustment screw rotates in situ in the through hole, and the lower end of the upper adjustment screw is screwed into the adjustment plate 7. Since the adjustment plate 7 cannot rotate, the adjustment plate 7 is pulled upward by the upper adjustment screw, and then the lower adjustment screw is rotated to ensure that the adjustment plate 7 is fixed by the lower adjustment screw. When the active gear 9 needs to move downward, tighten the two lower adjustment screws, and the ends of the two lower adjustment screws move downward to push the adjustment plate 7 downward. At the same time, loosen the upper adjustment screw, and the adjustment plate 7 will move downward. After adjusting the position of the adjustment plate 7, the motor and encoder combination seat 15 and the motor and encoder combination 8 can be connected and fixed.

[0030] refer to Figures 1 to 3 The Ku flat antenna 5 and the Ka flat antenna 6 are arranged on both sides of the rotation center of the azimuth rotating platform 1, which plays a role of balancing each other. In addition, the eccentricity of the steering system is reduced to a certain extent, the moment of inertia of the entire system is reduced, the dynamic responsiveness of the system is optimized, and the stability and tracking accuracy of the system are improved.

[0031] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A dual-frequency mobile communication antenna pitch synchronization drive mechanism, characterized in that: include: An azimuth rotating platform (1), wherein a support arm (2) is provided on the azimuth rotating platform (1), a first axis (3) and a second axis (4) are rotatably provided on the support arm (2), the first axis (3) and the second axis (4) are parallel, a Ku flat-plate antenna (5) is rotatably provided on the first axis (3), a Ka flat-plate antenna (6) is rotatably provided on the second axis (4), and the apertures of the Ku flat-plate antenna (5) and the Ka flat-plate antenna (6) are perpendicular to each other; and a motor and encoder combination (8), the motor and encoder combination (8) being directly or indirectly mounted on the support arm (2), the main shaft of the motor and encoder combination (8) being simultaneously transmission-connected to the Ku flat antenna (5) and the Ka flat antenna (6), and having an equal transmission ratio; A driving gear (9) is arranged on the main shaft of the motor and encoder combination (8); a first passive gear (10) is rotatably arranged on the first shaft (3); the first passive gear (10) is coaxially fixedly connected to the Ku flat antenna (5); a second passive gear (11) is rotatably arranged on the second shaft (4); the second passive gear (11) is coaxially fixedly connected to the Ka flat antenna (6); and the driving gear (9) is simultaneously meshed with the first passive gear (10) and the second passive gear (11); A first lug (301) is rotatably arranged on the first shaft (3), the Ku flat antenna (5) is fixed on the first lug (301), a second lug (401) is arranged on the second shaft (4), and the Ka flat antenna (6) is fixed on the second lug (401); The first passive gear (10) and the second passive gear (11) are both sector gears; the center of gravity of the first passive gear (10) and the center of gravity of the Ku flat antenna (5) are distributed on both sides of the first axis (3); and the center of gravity of the second passive gear (11) and the center of gravity of the Ka flat antenna (6) are distributed on both sides of the second axis (4); It also includes a motor and encoder assembly seat (15), the lower end of which is fixedly connected to the azimuth rotary platform (1), and the motor and encoder assembly seat (15) is provided with a plurality of vertical long holes, and is fixedly connected to the motor and encoder assembly (8) via a connecting piece passing through the vertical long holes.

2. The pitch synchronous driving mechanism for the dual-frequency communication-in-motion antenna according to claim 1, characterized in that: The first passive gear (10) is provided with a first limiting long hole (12), the second passive gear (11) is provided with a second limiting long hole (13), and the support arm (2) is provided with two limiting screws (14), the two limiting screws (14) respectively extending into the first limiting long hole (12) and the second limiting long hole (13).

3. The pitch synchronous driving mechanism for the dual-frequency communication-in-motion antenna according to claim 1, characterized in that: It also includes an adjustment plate (7), the end of the main shaft of the motor and encoder combination (8) cooperates with the adjustment plate (7) through a bearing, and the adjustment plate (7) is directly or indirectly connected to the support arm (2).

4. The pitch synchronous driving mechanism for the dual-frequency communication-in-motion antenna according to claim 3, characterized in that: The support arm (2) is provided with a transverse plate (201), the transverse plate (201) is provided with a through hole and a screw hole, the upper end of the adjustment plate (7) is provided with a screw corresponding to the through hole, the through hole is provided with an upward adjustment screw, the upward adjustment screw passes through the through hole and is screwed into the screw hole on the adjustment plate (7), the screw hole on the transverse plate (201) is equipped with a downward adjustment screw, the lower end of the downward adjustment screw is pressed against the upper end surface of the transverse plate (201).

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