An electrically adjustable antenna transmission device and a base station antenna

Abstract

This utility model relates to the field of antenna technology, and in particular to an electrically adjustable antenna transmission device and a base station antenna, including an electrically adjustable controller and a transmission device; the transmission device includes a gearbox assembly, a moving switching mechanism, a phase shifting module, and a selection wheel; the phase shifting module includes a supporting housing, multiple phase shifting racks arranged side by side, and multiple phase shifting wheel groups rotatably supported in the supporting housing, with each of the multiple phase shifting wheel groups meshing one-to-one with the multiple phase shifting racks; this utility model minimizes the space occupied by the device in the height direction, effectively solving the problem of increased antenna thickness after the expansion of traditional transmission systems, and providing core support for the miniaturization and thinning of multi-frequency antennas; the overall structure of this utility model is compact, reducing redundant components and wasted space, and the weight is significantly reduced compared to traditional bulky transmission systems, which better meets the requirements for lightweight assembly and use of base station antennas.

Description

Technical Field

[0001] This utility model relates to the field of antenna technology, and in particular to an electrically adjustable antenna transmission device and a base station antenna. Background Technology

[0002] With the rapid iteration of mobile communication technology, multi-band antennas have been widely used in various communication scenarios due to their excellent performance in signal coverage and frequency band adaptation. To achieve precise adjustment of the electrical downtilt angle of each frequency band of a multi-band antenna, the phase shifter needs to be selectively driven through a corresponding transmission mechanism. This is one of the core components for the multi-band antenna to achieve its function.

[0003] However, the increasing integration of base station antennas and the growing number of supported frequency bands have led to a corresponding increase in the overall width of the antenna. Under this trend, traditional transmission systems have revealed significant drawbacks: First, the structure is becoming increasingly complex and bulky, not only increasing the difficulty of antenna assembly but also reducing the long-term reliability of multi-frequency antennas; second, the original circumferentially distributed positioning adjustment device, when expanded to accommodate more frequency bands, will have a significantly increased height dimension, directly resulting in a larger overall antenna thickness, which is seriously contrary to the industry demand for miniaturized and thinner multi-frequency antennas.

[0004] Given the shortcomings of the existing technologies, there is an urgent need to develop a thin transmission device that is simple in structure, easy to manufacture, low in cost, lightweight, has significant advantages in terms of height and space occupation, and is reliable in quality, in order to solve the bottleneck problem currently faced by the development of multi-frequency antennas. Utility Model Content

[0005] The purpose of this utility model is to provide an electrically adjustable antenna transmission device that is simple in structure, easy to manufacture, low in cost, lightweight, has significant advantages in height space occupation, and is reliable in quality, as well as a base station antenna that uses the electrically adjustable antenna transmission device.

[0006] To achieve the purpose of this utility model, the following technical solution is adopted:

[0007] The first aspect of this utility model provides an electrically adjustable antenna transmission device, including an electrically adjustable controller and a transmission device; the transmission device includes a gearbox assembly, a moving switching mechanism, a phase shifting module and a selection wheel; the phase shifting module includes a support housing, a plurality of phase shifting racks arranged side by side and a plurality of phase shifting wheel groups rotatably supported in the support housing, wherein the plurality of phase shifting wheel groups mesh with the plurality of phase shifting racks in a one-to-one correspondence;

[0008] The gearbox assembly includes a position-selection transmission component and a phase-shifting transmission component. The electronic speed controller has a built-in position-selection motor and a phase-shifting motor. The output shaft of the position-selection motor is connected to the input end of the position-selection transmission component. The output end of the position-selection transmission component is connected to the position-selection pulley through a moving switching mechanism to drive the position-selection pulley to switch engagement among multiple phase-shifting pulley groups. The output shaft of the phase-shifting motor is connected to the input end of the phase-shifting transmission component. The output end of the phase-shifting transmission component is connected to the position-selection pulley through a moving switching mechanism to drive the position-selection pulley to rotate, thereby driving the corresponding phase-shifting rack to move.

[0009] A further improvement is that the support housing is provided with multiple phase-shifting guide grooves, and the phase-shifting rack can slide back and forth through the phase-shifting guide grooves of the support housing and one end is connected to the corresponding phase shifter pull rod to realize the adjustment of the phase shifter tilt angle. The phase-shifting guide groove is provided with a through hole for the phase-shifting wheel assembly in the support housing to mesh with the corresponding phase-shifting rack.

[0010] A further improvement is that the moving switching mechanism includes a positioning rack and a transmission guide shaft. The positioning rack is provided with a positioning fixing hole for rotatably mounting the positioning straight wheel. The transmission guide shaft passes through the positioning fixing hole and the hole of the positioning straight wheel and is rotatably supported on the support housing. The mating interface between the transmission guide shaft and the positioning straight wheel is splined. The output end of the positioning speed change component meshes with the teeth of the positioning rack, thereby driving the positioning rack and the positioning straight wheel to slide along the axial direction of the transmission guide shaft and realizing the switching engagement of the positioning straight wheel among multiple phase shifting wheel sets.

[0011] A further improvement is that the moving switching mechanism also includes a first conical wheel, which is sleeved on the transmission guide shaft. The interface between the transmission guide shaft and the first conical wheel is connected by a spline. The output end of the phase-shifting speed change component meshes with the first conical wheel, thereby driving the first conical wheel, the transmission guide shaft, and the selection wheel to rotate synchronously.

[0012] A further improvement is that the positioning and speed-changing component includes a positioning input sleeve and a speed-changing positioning wheel. The speed-changing positioning wheel is a double gear. The small-diameter gear segment of the speed-changing positioning wheel meshes with the teeth of the positioning rack. The outer end of the positioning input sleeve is connected to the output shaft of the positioning motor. The spur gear at the inner end of the positioning input sleeve meshes with the large-diameter gear segment of the speed-changing positioning wheel.

[0013] A further improvement is that the phase-shifting speed-changing component includes a phase-shifting input gear and a speed-changing phase-shifting gear. The speed-changing phase-shifting gear is a composite gear integrating a spur gear and a bevel gear, including a bevel gear at one end and a spur gear at the other end. The bevel gear at one end of the speed-changing phase-shifting gear meshes with a first bevel gear. The outer end of the phase-shifting input gear is connected to the output shaft of the phase-shifting motor, and the spur gear at the inner end of the phase-shifting input gear meshes with the spur gear at the other end of the speed-changing phase-shifting gear.

[0014] A further improvement is that each of the phase shifter sets includes a first phase shifter rotatably supported within the support housing and a second phase shifter meshing with the first phase shifter, with the plurality of first phase shifters arranged axially adjacent to each other;

[0015] The first phase shifting wheel is a double gear, including a phase shifting straight wheel at one end and a second conical wheel at the other end. The phase shifting straight wheel at one end of the first phase shifting wheel meshes with the positioning straight wheel.

[0016] The second phase shifter is a double gear, including a third conical gear at one end and a stud at the other end. The third conical gear at one end of the second phase shifter meshes with the second conical gear at the other end of the first phase shifter, and the stud at the other end of the second phase shifter meshes with the internal thread of the phase shifter rack.

[0017] A further improvement is that the number of phase-shifting modules is two sets, and the two sets of phase-shifting modules are symmetrically arranged on the left and right sides of the electronic control unit. The number of positioning rollers is two, and each positioning roller corresponds to one set of phase-shifting modules. The positioning rack has a positioning fixing hole at each end. The support housing includes a phase-shifting base and a phase-shifting cover. The phase-shifting base and the phase-shifting cover are integrated by fasteners and form a guide shaft fixing hole. The transmission guide shaft is rotatably supported between the guide shaft fixing holes of the support housing of the left and right sets of phase-shifting modules. The support housing also has a rack groove, which is used for the positioning rack to drive the positioning roller to extend into the support housing and mesh with the corresponding phase-shifting roller set.

[0018] A further improvement is that the overall height of the transmission device is not greater than the overall height of the electronic speed controller, and the highest point of the electronic speed controller is level with the highest point of the transmission device.

[0019] The second aspect of this utility model is a base station antenna, including an electrically adjustable antenna transmission device as described in any one of the first aspects.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention minimizes the space occupied by the device in the vertical direction, effectively solving the problem of increased antenna thickness after the expansion of traditional transmission systems, and providing core support for the miniaturization and thinning of multi-frequency antennas. The overall structure of this invention is compact, reducing redundant components and wasted space. Compared with traditional bulky transmission systems, the weight is significantly reduced, which better meets the requirements for lightweight assembly and use of base station antennas.

[0022] This invention designs a two-stage speed-regulating transmission mechanism, which allows for the design of the transmission ratio according to actual needs. Under the condition of constant motor speed, it achieves the optimal sliding speed of the positioning rack and the optimal rotation speed of the positioning spur wheel, respectively, thus avoiding the problems of low adjustment efficiency and poor accuracy caused by the fixed speed of traditional transmission systems. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an electrically adjustable antenna transmission device according to the present invention. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of an electrically adjustable antenna transmission device according to the present invention. Figure 2 ;

[0025] Figure 3 This is an exploded view of the gearbox assembly in this utility model;

[0026] Figure 4 This is a schematic diagram of the phase shifter assembly structure in this utility model. Figure 1 ;

[0027] Figure 5 This is an exploded view of phase-shifting module A in this utility model;

[0028] Figure 6 This is a schematic diagram of the structure of phase shifting module A and phase shifting module B in this utility model;

[0029] Figure 7 This is a schematic diagram of the phase shifter assembly structure in this utility model. Figure 2 .

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Gearbox assembly; 10. Positioning input sleeve wheel; 11. Gear shifting selection wheel; 12. First cone wheel; 13. Gear shifting phase shift wheel; 14. Phase shifting input sleeve wheel; 15. Drive guide shaft; 16. Positioning straight wheel; 17. Positioning rack; 18. Gearbox housing; 19. Gearbox cover; 2. Phase shifting module A; 20. Phase shifting rack; 21. Phase shifting cover A; 211. Phase shifting guide groove; 22. First phase shifting wheel; 22 1. Phase-shifting straight wheel; 222. Second conical wheel; 23. Second phase-shifting wheel; 231. Third conical wheel; 232. Stud; 24. Phase-shifting base A; 241. Guide shaft fixing hole A; 242. Rack groove A; 3. Phase-shifting module B; 31. Phase-shifting cover B; 34. Phase-shifting base B; 341. Guide shaft fixing hole B; 342. Rack groove B; 4. Electronic control controller; 5. Transmission device; 6. Fixing ring. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. These drawings are simplified schematic diagrams, illustrating only the basic structure of this utility model; therefore, the drawings only show the components relevant to this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] It should be noted that when a component is said to be "mounted" on another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The terms “and” and “and” as used herein include any and all combinations of one or more of the associated listed items.

[0035] Please refer to the attached document. Figure 1 - Appendix Figure 7 The first aspect of this utility model provides an electrically adjustable antenna transmission device, including an electrically adjustable controller 4 and a transmission device 5; the transmission device 5 includes a gearbox assembly 1, a moving switching mechanism, a phase shifting module, and a positioning wheel 16.

[0036] Specifically, the end face of the ESC controller 4 integrates a male-female compatible interface conforming to AISG v2.0 or higher standards. The shape and dimensions of this interface strictly follow the definition of StyleAf1 / Af2 external connectors and protective covers in the AISG Connector specification C485, with a maximum outer diameter of 20.5mm. Based on this, a 2mm installation and safety margin is reserved on each side around the interface, thereby optimizing the overall height H2 of the ESC controller 4 to no more than 24.5mm.

[0037] The phase-shifting module includes a support housing, a plurality of phase-shifting racks 20 arranged side by side, and a plurality of phase-shifting wheel sets rotatably supported in the support housing, wherein the plurality of phase-shifting wheel sets mesh with the plurality of phase-shifting racks 20 in a one-to-one correspondence.

[0038] Specifically, the gearbox assembly 1 includes a position shifting transmission component and a phase shifting transmission component. The gearbox assembly 1 also includes a gearbox housing 18 and a gearbox cover 19. The gearbox housing 18 and the gearbox cover 19 are connected by fastening screws or snap-fit ​​connections to form a cavity for accommodating the position shifting transmission component and the phase shifting transmission component.

[0039] Understandably, the gearbox assembly 1 can adjust the speed output by the electronic speed controller 4 as needed to adapt to the speed requirements of the transmission device 5 for positioning and the speed requirements of the phase shifting module.

[0040] The electronic speed controller 4 has a built-in position selection motor and a phase shifting motor, as well as a corresponding control circuit board (not shown in the figure). The position selection motor and the phase shifting motor can output a constant speed. The output shaft of the position selection motor is connected to the input end of the position selection speed change component. The output end of the position selection speed change component is connected to the position selection spur wheel 16 through a moving switching mechanism to drive the position selection spur wheel 16 to switch engagement among multiple phase shifting wheel groups. The output shaft of the phase shifting motor is connected to the input end of the phase shifting speed change component. The output end of the phase shifting speed change component is connected to the position selection spur wheel 16 through a moving switching mechanism to drive the position selection spur wheel 16 to rotate, thereby driving the corresponding phase shifting rack 20 to move.

[0041] In this embodiment, the support housing is provided with a plurality of phase shifting guide grooves 211. The phase shifting rack 20 is slidably inserted into the phase shifting guide groove 211 of the support housing and one end is connected to the corresponding phase shifter pull rod (not shown in the figure) to realize the adjustment of the phase shifter tilt angle. The phase shifting guide groove 211 is provided with a through hole for the phase shifting wheel assembly in the support housing to mesh with the corresponding phase shifting rack 20.

[0042] In this embodiment, the moving switching mechanism includes a positioning rack 17 and a transmission guide shaft 15. The positioning rack 17 is an elongated component with teeth. A positioning fixing hole is provided on the positioning rack 17 for rotatably mounting the positioning wheel 16. The transmission guide shaft 15 passes through the positioning fixing hole and the hole of the positioning wheel 16 and is rotatably supported on the support housing. The interface between the transmission guide shaft 15 and the positioning wheel 16 is splined, allowing the positioning wheel 16 to rotate with the transmission guide shaft 15. Simultaneously, the positioning wheel 16 can slide freely along the spline axis of the transmission guide shaft 15 under the drive of the positioning rack 17. The output end of the positioning speed change component meshes with the teeth of the positioning rack 17, thereby driving the positioning rack 17 and the positioning wheel 16 to slide along the axial direction of the transmission guide shaft 15 and enabling the positioning wheel 16 to switch engagement between multiple phase-shifting wheel sets.

[0043] In this embodiment, there are two sets of phase shifting modules, which are named phase shifting module A2 and phase shifting module B3. The two sets of phase shifting modules are symmetrically arranged on the left and right sides of the electronic control controller 4. There are two selection rollers 16, each of which corresponds to one set of phase shifting modules. The selection rack 17 has a selection fixing hole at each end for installing the selection roller 16.

[0044] Specifically, in this embodiment, the support housing of phase-shifting module A2 includes a phase-shifting base A24 and a phase-shifting cover A21 (similarly, the support housing of phase-shifting module B3 includes a phase-shifting base B34 and a phase-shifting cover B31). The phase-shifting base A24 and the phase-shifting cover A21 are integrated by fasteners and form a guide shaft fixing hole A241 (similarly, the phase-shifting base B34 and the phase-shifting cover B31 are integrated by fasteners and form a guide shaft fixing hole B341). The two ends of the shaft 15 are designed as cylinders. The two cylindrical ends of the transmission guide shaft 15 are rotatably supported between the guide shaft fixing hole A241 and the guide shaft fixing hole B341. The support housing of the phase shifting module A2 also has a rack groove A242 (similarly, the support housing of the phase shifting module B3 also has a rack groove B342). The rack groove A242 and the rack groove B342 are used for the selection rack 17 to drive the selection straight wheel 16 to extend into the support housing and mesh with the corresponding phase shifting wheel set.

[0045] Specifically, when it is necessary to drive phase shift module A2, the control rack 17 is slid towards phase shift module A2, pushing the selection wheel 16 on the selection rack 17 located on the phase shift module A2 side to mesh with the phase shift wheel group of phase shift module A2. At this time, the selection wheel 16 on the selection rack 17 located on the phase shift module B3 side is completely disengaged from the phase shift wheel group of phase shift module B3, achieving selective driving. Similarly, when it is necessary to drive phase shift module B3, the control rack 17 is slid towards phase shift module B3, pushing the selection wheel 16 on the selection rack 17 located on the phase shift module B3 side to mesh with the phase shift wheel group of phase shift module B3. At this time, the selection wheel 16 on the selection rack 17 located on the phase shift module A2 side is completely disengaged from the phase shift wheel group of phase shift module A2, achieving selective driving.

[0046] In this embodiment, the moving switching mechanism further includes a first conical wheel 12, which is sleeved on the transmission guide shaft 15. The interface between the transmission guide shaft 15 and the first conical wheel 12 is connected by a spline, so that the transmission guide shaft 15 can rotate together with the first conical wheel 12. The output end of the phase-shifting speed change component meshes with the first conical wheel 12, thereby driving the first conical wheel 12, the transmission guide shaft 15, and the positioning straight wheel 16 to rotate synchronously.

[0047] In addition, a fixing ring 6 is provided on one side of the gearbox seat 18 to rotatably mount the first cone wheel 12, thereby fixing the position of the first cone wheel 12.

[0048] Specifically, in a preferred embodiment, the positioning and speed-changing component includes a positioning input gear 10 and a speed-changing positioning gear 11. The speed-changing positioning gear 11 is a double gear. The small-diameter gear segment of the speed-changing positioning gear 11 meshes with the teeth of the positioning rack 17. The outer end of the positioning input gear 10 is connected to the output shaft of the positioning motor, and the spur gear at the inner end of the positioning input gear 10 meshes with the large-diameter gear segment of the speed-changing positioning gear 11.

[0049] It is understandable that the rotation of the positioning motor can drive the rotation of the positioning input sleeve 10, and the rotation of the positioning input sleeve 10 can drive the rotation of the speed-changing positioning wheel 11, thereby driving the positioning rack 17 to slide left and right along the axial direction of the transmission guide shaft 15.

[0050] Specifically, in a preferred embodiment of this invention, the phase-shifting speed-changing component includes a phase-shifting input gear 14 and a speed-changing phase-shifting gear 13. The speed-changing phase-shifting gear 13 is a composite gear integrating a spur gear and a bevel gear, including a bevel gear at one end and a spur gear at the other end. The bevel gear at one end of the speed-changing phase-shifting gear 13 meshes with a first bevel gear 12. The outer end of the phase-shifting input gear 14 is connected to the output shaft of the phase-shifting motor, and the spur gear at the inner end of the phase-shifting input gear 14 meshes with the spur gear at the other end of the speed-changing phase-shifting gear 13.

[0051] It is understandable that the rotation of the phase-shifting motor can drive the phase-shifting input sleeve 14 to rotate, and the rotation of the phase-shifting input sleeve 14 can drive the rotation of the variable speed phase-shifting wheel 13, thereby driving the rotation of the first conical wheel 12. Since the transmission guide shaft 15, the positioning straight wheel 16 and the first conical wheel 12 are splined, the rotation of the first conical wheel 12 can drive the synchronous rotation of the transmission guide shaft 15 and the positioning straight wheel 16 respectively.

[0052] Specifically, the position spacing between the position selection input wheel 10 and the phase shift input wheel 14 can be designed and laid out in a one-to-one correspondence according to the position of the position selection motor and the phase shift motor of the ESC controller 4.

[0053] In addition, those skilled in the art can design the transmission ratio between the spur gear of the selection input gear 10 and the speed-changing selection gear 11, as well as the transmission ratio between the selection rack 17 and the speed-changing selection gear 11, according to actual needs, so as to achieve the purpose of two-stage speed change. Under the condition that the speed of the selection motor of the electronic speed controller 4 remains unchanged, the optimal speed of the selection rack 17 sliding left and right is finally achieved.

[0054] Similarly, those skilled in the art can design the transmission ratio between the spur gear of the phase-shifting input gear 14 and the spur gear of the variable-speed phase-shifting gear 13, as well as the transmission ratio between the bevel gear of the variable-speed phase-shifting gear 13 and the first bevel gear 12, according to actual needs, so as to achieve the purpose of two-stage speed change. Under the condition that the speed of the phase-shifting motor of the electronic speed controller 4 remains unchanged, the optimal rotation speed of the position selection spur gear 16 is finally achieved.

[0055] Since phase shifting module A2 and phase shifting module B3 have a symmetrical structure, this embodiment uses phase shifting module A2 as an example to describe the structure of the phase shifting module. The structure of phase shifting module B3 can be referred to that of phase shifting module A2.

[0056] Specifically, each phase shifting wheel assembly within the support housing of the phase shifting module A2 includes a first phase shifting wheel 22 rotatably supported within the support housing and a second phase shifting wheel 23 meshing with the first phase shifting wheel 22, with the plurality of first phase shifting wheels 22 arranged axially adjacent to each other.

[0057] Specifically, the first phase shifter 22 is a double gear, including a phase shifter straight gear 221 at one end and a second conical gear 222 at the other end. The phase shifter straight gear 221 at one end of the first phase shifter 22 meshes with the positioning straight gear 16.

[0058] Specifically, the second phase shifter 23 is a double gear, including a third conical gear 231 at one end and a stud 232 at the other end. The third conical gear 231 at one end of the second phase shifter 23 meshes with the second conical gear 222 at the other end of the first phase shifter 22, and the stud 232 at the other end of the second phase shifter 23 meshes with the internal thread of the phase shifter rack 20.

[0059] Understandably, after the positioning wheel 16 selects a position, when the positioning wheel 16 rotates, the power is transmitted through the first phase shifting wheel 22 to the stud 232 of the second phase shifting wheel 23. The rotation of the stud 232 drives the phase shifting rack 20 to move linearly, thereby pushing the phase shifter connected to it, changing the phase of the antenna radiation wave, and realizing the electric downtilt angle adjustment.

[0060] In this embodiment, the rotation axes of all gears (including gearbox assembly 1 and phase shifting module gears) inside the transmission device 5 are arranged in the same horizontal plane, which greatly reduces the space stacking in the height direction.

[0061] In this embodiment, the overall height H1 of the transmission device 5 is not greater than the overall height H2 of the electronic speed controller 4 (i.e., ≤24.5mm), and the highest point of the electronic speed controller 4 is flush with the highest point of the transmission device 5, so as to minimize the height of the transmission device 5 and the electronic speed controller 4.

[0062] The second aspect of this utility model provides a base station antenna, which includes an electrically adjustable antenna transmission device as described in any of the embodiments of the first aspect above. Since the structure of other parts of the base station antenna is prior art, those skilled in the art can implement it by referring to the prior art, and this embodiment will not be described in detail here.

[0063] This invention minimizes the space occupied by the device in the vertical direction, effectively solving the problem of increased antenna thickness after the expansion of traditional transmission systems, and providing core support for the miniaturization and thinning of multi-frequency antennas. The overall structure of this invention is compact, reducing redundant components and wasted space. Compared with traditional bulky transmission systems, the weight is significantly reduced, which better meets the requirements for lightweight assembly and use of base station antennas.

[0064] This invention designs a two-stage speed-regulating transmission mechanism, which allows for the design of the transmission ratio according to actual needs. Under the condition of constant motor speed, it achieves the optimal sliding speed of the selection rack 17 and the optimal rotation speed of the selection spur wheel 16, respectively, thus avoiding the problems of low adjustment efficiency and poor accuracy caused by the fixed speed of traditional transmission systems.

[0065] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered as within the scope of this specification. The above embodiments only illustrate specific implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An electrically adjustable antenna transmission device, characterized in that, It includes an electronic speed controller and a transmission device; the transmission device includes a gearbox assembly, a moving switching mechanism, a phase shifting module and a selection wheel; the phase shifting module includes a support housing, multiple phase shifting racks arranged side by side and multiple phase shifting wheel sets rotatably supported in the support housing, and the multiple phase shifting wheel sets mesh with the multiple phase shifting racks one by one; The gearbox assembly includes a position-selection transmission component and a phase-shifting transmission component. The electronic speed controller has a built-in position-selection motor and a phase-shifting motor. The output shaft of the position-selection motor is connected to the input end of the position-selection transmission component. The output end of the position-selection transmission component is connected to the position-selection pulley through a moving switching mechanism to drive the position-selection pulley to switch engagement among multiple phase-shifting pulley groups. The output shaft of the phase-shifting motor is connected to the input end of the phase-shifting transmission component. The output end of the phase-shifting transmission component is connected to the position-selection pulley through a moving switching mechanism to drive the position-selection pulley to rotate, thereby driving the corresponding phase-shifting rack to move.

2. The electrically adjustable antenna transmission device according to claim 1, characterized in that, The support housing is provided with multiple phase shifting guide grooves. The phase shifting rack can slide back and forth through the phase shifting guide grooves of the support housing and one end is connected to the corresponding phase shifter pull rod to realize the adjustment of the phase shifter tilt angle. The phase shifting guide groove is provided with a through hole for the phase shifting wheel assembly in the support housing to mesh with the corresponding phase shifting rack.

3. The electrically adjustable antenna transmission device according to claim 1, characterized in that, The moving switching mechanism includes a positioning rack and a transmission guide shaft. The positioning rack is provided with a positioning fixing hole for rotatably mounting the positioning straight wheel. The transmission guide shaft passes through the positioning fixing hole and the hole of the positioning straight wheel and is rotatably supported on the support housing. The mating interface between the transmission guide shaft and the positioning straight wheel is splined. The output end of the positioning speed change component meshes with the teeth of the positioning rack, thereby driving the positioning rack and the positioning straight wheel to slide along the axial direction of the transmission guide shaft and realizing the switching engagement of the positioning straight wheel among multiple phase shifting wheel sets.

4. The electrically adjustable antenna transmission device according to claim 3, characterized in that, The moving switching mechanism also includes a first conical wheel, which is sleeved on the transmission guide shaft. The interface between the transmission guide shaft and the first conical wheel is connected by a spline. The output end of the phase-shifting speed change component meshes with the first conical wheel, thereby driving the first conical wheel, the transmission guide shaft, and the selection wheel to rotate synchronously.

5. The electrically adjustable antenna transmission device according to claim 3, characterized in that, The positioning and speed-changing component includes a positioning input sleeve and a speed-changing positioning wheel. The speed-changing positioning wheel is a double gear. The small-diameter gear segment of the speed-changing positioning wheel meshes with the teeth of the positioning rack. The outer end of the positioning input sleeve is connected to the output shaft of the positioning motor. The spur gear at the inner end of the positioning input sleeve meshes with the large-diameter gear segment of the speed-changing positioning wheel.

6. The electrically adjustable antenna transmission device according to claim 4, characterized in that, The phase-shifting speed-changing component includes a phase-shifting input gear and a speed-changing phase-shifting gear. The speed-changing phase-shifting gear is a composite gear integrating a spur gear and a bevel gear, including a bevel gear at one end and a spur gear at the other end. The bevel gear at one end of the speed-changing phase-shifting gear meshes with a first bevel gear. The outer end of the phase-shifting input gear is connected to the output shaft of the phase-shifting motor, and the spur gear at the inner end of the phase-shifting input gear meshes with the spur gear at the other end of the speed-changing phase-shifting gear.

7. The electrically adjustable antenna transmission device according to claim 1, characterized in that, Each of the phase shifter sets includes a first phase shifter rotatably supported within the support housing and a second phase shifter meshing with the first phase shifter, with a plurality of the first phase shifters arranged axially adjacent to each other; The first phase shifting wheel is a double gear, including a phase shifting straight wheel at one end and a second conical wheel at the other end. The phase shifting straight wheel at one end of the first phase shifting wheel meshes with the positioning straight wheel. The second phase shifter is a double gear, including a third conical gear at one end and a stud at the other end. The third conical gear at one end of the second phase shifter meshes with the second conical gear at the other end of the first phase shifter, and the stud at the other end of the second phase shifter meshes with the internal thread of the phase shifter rack.

8. The electrically adjustable antenna transmission device according to claim 3, characterized in that, The phase-shifting modules are arranged in two sets, symmetrically on the left and right sides of the electronic control unit. There are two positioning rollers, each corresponding to one set of phase-shifting modules. The positioning rack has a positioning fixing hole at each end. The support housing includes a phase-shifting base and a phase-shifting cover. The phase-shifting base and the phase-shifting cover are integrated by fasteners and form a guide shaft fixing hole. The transmission guide shaft is rotatably supported between the guide shaft fixing holes of the support housing of the left and right sets of phase-shifting modules. The support housing also has a rack groove, which is used for the positioning rack to drive the positioning roller to extend into the support housing and mesh with the corresponding phase-shifting roller set.

9. An electrically adjustable antenna transmission device according to any one of claims 1-8, characterized in that, The overall height of the transmission device is not greater than the overall height of the electronic speed controller, and the highest point of the electronic speed controller is level with the highest point of the transmission device.

10. A base station antenna, characterized in that, Includes an electrically adjustable antenna drive device as described in any one of claims 1-9.

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