Panel antenna pedestal structure

Abstract

The utility model relates to a planar antenna pedestal structure, and belongs to the technical field of communication. Comprising a base and a rotary table, and the rotary table is rotationally arranged on the base through an orientation driving module; the azimuth driving module comprises a first driving motor, a first motor speed reducer, a driving gear, an external tooth type four-point ball bearing, a driven gear and a first photoelectric encoder; the first driving motor transmits torque to the driving gear through the first motor reducer, the driving gear is meshed with the outer tooth type four-point ball bearing, and the outer tooth type four-point ball bearing drives the rotary table to rotate. The outer tooth type four-point ball bearing is meshed with the driven gear, and the first photoelectric encoder is connected to the driven gear through a gear shaft so as to detect the azimuth angle. Through the above structure, azimuth rotation of the antenna pedestal is realized, the antenna pedestal is small, beautiful and portable, and the structure is compact, stable and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of communication and relates to a flat antenna seat structure. Background Art

[0002] With the rapid development of microwave communication industry and the increasing frequency of aerospace activities, traditional parabolic antennas can no longer meet our high requirements for high integration, high gain, wide bandwidth and easy installation and transportation of RF front-end antennas, so flat array antennas came into being. In order to meet the installation and movement of array antennas, considering the reliability, practicality and aesthetics of the overall structure, it is now necessary to design an antenna pedestal with a different structure from the traditional antenna pedestal.

[0003] In the prior art, compared with the traditional antenna base, the flat antenna base occupies less space overall, is flat, is easy to disassemble and assemble, and is more suitable for array antennas. Since the array antenna abandons the traditional parabolic antenna structure and has no electric axis, the flat antenna base can no longer adopt the traditional three-axis structure. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a flat antenna base structure to adapt to an array antenna.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] A flat antenna seat structure comprises a base and a turntable, wherein the turntable is rotatably arranged on the base by an azimuth drive module; the azimuth drive module comprises: a first drive motor, a first motor reducer, a driving gear, an externally-toothed four-point ball bearing, a driven gear, and a first photoelectric encoder; the first drive motor transmits torque to the driving gear via the first motor reducer, the driving gear meshes with the externally-toothed four-point ball bearing, and the externally-toothed four-point ball bearing drives the turntable to rotate; the externally-toothed four-point ball bearing meshes with the driven gear, and the first photoelectric encoder is connected to the driven gear via a gear shaft to detect an azimuth angle.

[0007] Optionally, a conductive slip ring is arranged at the center of the external gear four-point ball bearing to transmit electrical energy and signals; the conductive slip ring includes a rotor and a stator, wherein the rotor rotates synchronously with the turntable, and the stator is arranged on the base.

[0008] Optionally, an eccentric flange is provided on the base, and the driving gear is mounted on the eccentric flange to eliminate gear clearance.

[0009] Optionally, one side of the turntable is connected to the antenna board via a pitch arm, and the pitch arm drives the antenna board to open and close.

[0010] Optionally, the pitch arm is driven to move by a pitch drive module.

[0011] Optionally, the pitch drive module includes a second drive motor, a second reducer, a second photoelectric encoder, a pitch main axis, and a pitch secondary axis. The second drive motor transmits the torque to the pitch main axis via the second reducer, and the pitch main axis drives the pitch arm to move; the pitch main axis is fixedly connected to the pitch secondary axis, and the torque of the pitch main axis is directly transmitted to the pitch secondary axis; the second photoelectric encoder is arranged on the pitch secondary axis.

[0012] Optionally, the second photoelectric encoder is a hollow shaft encoder, including a rotor and a stator, wherein the rotor is fixedly arranged inside the turntable, and the rotor is sleeved on the pitch secondary axis.

[0013] Optionally, the rotation angle of the antenna board is -5° to 95°, wherein a limit block is provided in the turntable to ensure that the antenna board is limited when it is rotated to -5°; the turntable and the antenna board's own structure ensure that the rotation of the antenna board does not exceed 95°.

[0014] Optionally, the turntable and the base are made of aluminum alloy.

[0015] Optionally, the base and turntable are made of thin-walled structure and reinforcing ribs to ensure their lightness and structural rigidity.

[0016] The beneficial effects of the utility model are:

[0017] The antenna base structure of the utility model not only meets the requirements of the antenna's motion index, but also meets the requirements of the antenna and the antenna base's appearance and weight. The utility model not only ensures that the antenna base can achieve infinite azimuth rotation and pitch -5° to 95° operation, but also ensures that the antenna base is small, beautiful, portable, compact, stable and reliable.

[0018] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0020] Figure 1 is a cross-sectional view of the antenna base;

[0021] Figure 2 It is a schematic diagram of azimuth transmission;

[0022] Figure 3 It is a schematic diagram of pitch transmission;

[0023] Figure 4 It is a schematic diagram of the working state of the utility model;

[0024] Figure 5 It is a schematic diagram of the storage state of the utility model.

[0025] Figure numerals: 1 turntable, 2 base, 3 external gear four-point ball bearing, 4 first drive motor, 5 conductive slip ring, 6 first photoelectric encoder, 7 driving gear, 8 driven gear, 9 second photoelectric encoder, 10 pitch arm, 11 second drive motor, 12 second reducer. DETAILED DESCRIPTION

[0026] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0027] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] See also Figure 1 to Figure 5Starting from the appearance structure, the utility model provides a flat grid structure similar to the appearance of the array antenna in order to adapt to the antenna plate structure of the array antenna. The overall structure still belongs to the traditional azimuth and pitch structure, the lower half of which is a square fixed base 2, and the upper half is a square turntable 1. However, since the traditional shaft system structure is generally larger in the vertical direction, this design adopts an external gear four-point ball bearing 3 structure for azimuth rotation; and for pitch transmission, the general azimuth and pitch coaxial structure cannot meet this demand, so an eccentric seat frame structure is adopted.

[0030] The flat antenna seat structure is divided into two parts: azimuth transmission and pitch transmission. The azimuth transmission includes an azimuth drive device, an azimuth axis position monitoring device, and a slip ring device. The azimuth drive device includes a first drive motor 4, a first reducer, an eccentric flange, and an azimuth active gear 7. The first drive motor 4 and the reducer transmit the driving force to the active gear 7, and then transmit the torque to the external four-point ball bearing 3 through the gear transmission; the inner ring of the external four-point ball bearing 3 drives the pitch turntable 1 and the antenna plate to perform azimuth rotation. The eccentric flange plays a role in eliminating gear clearance.

[0031] The azimuth axis position monitoring device includes a first photoelectric encoder 6 and an azimuth encoder gear shaft. Through the gear transmission of the azimuth encoder gear shaft, the azimuth angle position information is transmitted to the first photoelectric encoder 6 by the driven gear 8; and the azimuth encoder gear adopts a double gear torsion spring clearance elimination method to improve the accuracy and precision of the information collected by the first photoelectric encoder 6. The conductive slip ring 5 device plays the role of transmitting electrical energy and signals between the upper transmission and the lower transmission. Its stator is fixed on the lower transmission base 2, and the rotor is driven to rotate by the upper transmission turntable 1.

[0032] The pitch transmission includes a pitch drive device, a pitch axis position monitoring device, and a pitch limit device. Considering the overall appearance is beautiful and compact, the pitch axis is offset to one end, and the drive device, pitch axis position monitoring device, and pitch limit device are coaxially installed to ensure the compactness of the pitch transmission and the reliability of the overall solution.

[0033] The pitch transmission chain is composed of the second drive motor 11 and the second reducer 12, which transmit the motion to the pitch axis, and use the motion of the pitch arm 10 to drive the antenna to do pitch motion; the pitch axis on the other side is connected to the absolute hollow shaft encoder (the second photoelectric encoder 9), so as to feed back the pitch motion information to the second photoelectric encoder 9. The pitch drive device includes the second drive motor 11 and the second reducer 12; it directly transmits the driving force to the pitch main axis, and the pitch main axis also acts as the left arm to transmit the driving force to the antenna board. The pitch axis position monitoring device is an absolute hollow shaft encoder (the second photoelectric encoder 9); its stator is fixed on the inner side of the pitch turntable 1, and the rotor is locked on the pitch secondary axis.

[0034] The pitch limit device includes software limit, electrical limit and mechanical limit. Among them, the electrical limit is composed of a locking clamp and an induction screw structure in combination with a Hall sensor. The mechanical limit includes the pitch upper limit and the pitch lower limit. The pitch upper limit uses the structure of the antenna base itself. When the flat antenna pitches to 95°, the antenna base itself forms a limit block for it; and the pitch lower limit uses an additional limit block to limit the flat antenna when it turns to -5°, and shock-absorbing measures are taken for the upper and lower limits.

[0035] In other aspects, the flat antenna base adopts a sealing pad waterproof design; the azimuth box adopts a heat dissipation slot to increase the heat dissipation area for heat dissipation. Most of the structural parts of the antenna base are made of aluminum alloy, and important shaft system structures and gears are made of alloy structural steel. The azimuth base 2 and the pitch turntable 1 adopt a combination of thin-walled structure and reinforcing ribs to ensure sufficient overall strength and rigidity while achieving the purpose of lightweight. The azimuth base 2 and the pitch turntable 1 are made of aluminum alloy, and milling is mainly used for processing. The design of the antenna base strictly calculates the load and selects the motor according to the use environment and application requirements to ensure the functional indicators of the antenna base.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A flat antenna base structure, characterized in that: It comprises a base (2) and a turntable (1), wherein the turntable (1) is rotatably arranged on the base (2) by an azimuth drive module; The azimuth drive module comprises: a first drive motor (4), a first motor reducer, a driving gear (7), an externally-toothed four-point ball bearing (3), a driven gear (8), and a first photoelectric encoder (6); the first drive motor (4) transmits torque to the driving gear (7) via the first motor reducer, the driving gear (7) meshes with the externally-toothed four-point ball bearing (3), and the externally-toothed four-point ball bearing (3) drives the turntable (1) to rotate; the externally-toothed four-point ball bearing (3) meshes with the driven gear (8), and the first photoelectric encoder (6) is connected to the driven gear (8) via a gear shaft to detect an azimuth angle.

2. The flat antenna base structure according to claim 1, characterized in that: A conductive slip ring (5) is arranged at the center of the external gear four-point ball bearing (3) to transmit electric energy and signals; the conductive slip ring (5) comprises a rotor and a stator, wherein the rotor rotates synchronously with the turntable (1), and the stator is arranged on the base (2).

3. The flat antenna base structure according to claim 1, characterized in that: An eccentric flange is provided on the base (2), and the driving gear (7) is mounted on the eccentric flange to eliminate gear clearance.

4. The flat antenna base structure according to claim 1, characterized in that: One side of the turntable (1) is connected to the antenna board via a pitch arm (10), and the pitch arm (10) drives the antenna board to open and close.

5. The flat antenna base structure according to claim 4, characterized in that: The pitch support arm (10) is driven to move by a pitch drive module.

6. The flat antenna base structure according to claim 5, characterized in that: The pitch drive module comprises a second drive motor (11), a second reducer (12), a second photoelectric encoder (9), a pitch main axis, and a pitch secondary axis; the second drive motor (11) transmits torque to the pitch main axis via the second reducer (12), and the pitch main axis drives the pitch support arm (10) to move; the pitch main axis is fixedly connected to the pitch secondary axis, and directly transmits the torque of the pitch main axis to the pitch secondary axis; the second photoelectric encoder (9) is arranged on the pitch secondary axis.

7. The flat antenna base structure according to claim 6, characterized in that: The second photoelectric encoder (9) is a hollow shaft encoder, comprising a rotor and a stator, wherein the rotor is fixedly arranged inside the turntable (1), and the rotor is sleeved on the pitch secondary axis.

8. The flat antenna base structure according to claim 4, characterized in that: The rotation angle of the antenna plate is -5°-95°, wherein a limit block is provided in the turntable (1) to ensure that the antenna plate is limited when it is rotated to -5°; the turntable (1) and the antenna plate's own structure ensure that the rotation of the antenna plate does not exceed 95°.

9. The flat antenna base structure according to claim 1, characterized in that: The turntable (1) and the base (2) are made of aluminum alloy.

10. The flat antenna base structure according to claim 1, characterized in that: The base (2) and the turntable (1) are made of thin-walled structures and reinforced ribs to ensure their lightness and structural rigidity.

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