Device for adjusting declination angle of communication antenna

Abstract

The invention relates to the technical field of communication antenna installation, and discloses a device for adjusting the declination angle of a communication antenna, and the device comprises an installation rod, an adjusting seat, an abutting rod, a wind measuring disc and an adjusting intelligent controller, the abutting rod is vertically connected with the installation rod in an inserted manner, and the bottom of the abutting rod abuts against the top of the adjusting seat; an electromagnet mounted with the mounting rod is arranged on one side of the propping rod; the middle part of the wind measuring disc is rotationally connected with the mounting rod through a conduction rod I, and the lower part of the conduction rod I is connected with the middle part of the volute spiral spring; a wind speed detection module and a regulation and control module are arranged on the regulation intelligent controller; according to the invention, the wind speed state is automatically detected, the locking transition state of the adjusting seat is controlled according to the wind speed, the downward inclination angle adjusting device of the communication antenna module can be automatically locked in a strong wind environment, the influence of strong wind on the installation stability of the communication antenna module is reduced, and the communication antenna module is still stable in the strong wind environment; and the deviation change of the downward inclination angle is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of communication antenna installation, and in particular to a device for adjusting the downtilt angle of a communication antenna. Background Art

[0002] Base station antennas are devices that wirelessly connect mobile communication networks to user mobile devices over the air. Base station antennas are primarily categorized into two types: omnidirectional and directional. Omnidirectional antennas exhibit uniform 360-degree radiation in the horizontal pattern and are suitable for large-scale, suburban district-based stations, offering wide coverage. Directional antennas radiate within a defined angular range in the horizontal pattern and are suitable for small-scale, urban district-based stations, offering narrow coverage, high user density, and efficient frequency utilization. Base stations using directional antennas typically have three or four sectors, each with one or more antennas, providing 360-degree coverage.

[0003] In the prior art, Chinese Patent Publication No. CN119153949A discloses a device for adjusting the downtilt angle of a communication antenna, comprising a main shaft and a bottom bracket fixed to the main shaft, wherein the bottom bracket has multiple mounting shafts uniformly fixed in an annular pattern on the upper end thereof, wherein the side walls of the multiple mounting shafts are each rotatably connected to a screw rod, and further comprising: communication antennas rotatably connected to the multiple mounting shafts, and sliding sleeves slidably connected to the multiple mounting shafts; wherein the multiple sliding sleeves are each rotatably connected to a connecting rod. By pushing different lifting slides upward by a driving mechanism and rotating the drive shaft, the downtilt angles of the multiple communication antennas can be adjusted separately, thereby simplifying the steps for adjusting the downtilt angles of the multiple communication antennas. The aforementioned adjustment structure is relatively complex, and multiple linkage mechanisms are provided to adjust the downtilt angles of the communication antennas. After adjustment, the adjusted communication antennas can remain stable in favorable weather conditions. However, in windy conditions, the stability of the adjustment device is difficult to ensure, and it is prone to shaking, thereby affecting the stability of the adjusted communication antennas.

[0004] Therefore, it is necessary to provide a device for adjusting the downtilt angle of a communication antenna to solve the above technical problems. Summary of the Invention

[0005] The object of the present invention is to provide a device for adjusting the downtilt angle of a communication antenna to solve the existing problems in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for adjusting the downtilt angle of a communication antenna, comprising: a mounting rod, a plurality of single rods mounted on the outer ring of the mounting rod, a communication antenna module mounted on each of the single rods, the lower end of the communication antenna module being rotatably connected to the single rod via a rotating seat, and the upper end of the communication antenna module being connected to the single rod via a telescopic connecting rod, and further comprising:

[0008] An adjustment seat, the adjustment seat is vertically slidably connected to the mounting rod, the middle portion of the adjustment seat is rotatably connected to an adjustment screw, the outer ring of the adjustment seat is connected to the telescopic connecting rod on the communication antenna module through a control assembly, and the telescopic connecting rod is controlled to be extended and retracted by vertical movement of the adjustment seat to adjust the inclination angle of the communication antenna module;

[0009] A push rod, the push rod is vertically plugged into the mounting rod, the bottom of the push rod is in contact with the top of the adjustment seat, and one side of the push rod is provided with an electromagnet mounted on the mounting rod;

[0010] A wind measuring disc is arranged on the top of the mounting rod, the middle portion of the wind measuring disc is rotatably connected to the mounting rod via a first conducting rod, the lower portion of the first conducting rod is connected to the middle portion of a volute spring, and a pressure sensor is installed on the outer ring of the volute spring;

[0011] An adjusting intelligent controller is installed on the mounting rod. A wind speed detection module and a control module are provided on the adjusting intelligent controller. The wind speed detection module is respectively connected to the control module and the pressure sensor signal, and the control module is connected to the electromagnet signal.

[0012] As a further solution of the present invention, the regulating assembly includes a guide rod plugged into the outer ring of the adjusting seat and an adjusting ring sleeved with the single rod. The end of the guide rod is rotatably connected to the adjusting ring. The outer ring of the adjusting ring is rotatably connected to a connecting rod at a position corresponding to the telescopic connecting rod. The end of the connecting rod is rotatably connected to the central axis on the corresponding telescopic connecting rod.

[0013] As a further solution of the present invention, the spiral spring is installed in the middle of the mounting rod, a limit block fixed to the inner wall of the mounting rod is provided on the outside of the spiral spring, and the pressure sensor is installed between the limit block and the outer wall of the spiral spring.

[0014] As a further solution of the present invention, a ratchet assembly is installed between the transmission rod 1 and the inner wall of the mounting rod to limit the transmission rod 1 from rotating in a single direction.

[0015] As a further solution of the present invention, the lower part of the transmission rod one is designed as a segmented design, and the lower section of the transmission rod one is set as the transmission rod two. The bottom of the transmission rod two is connected to the middle part of the spiral spring. The bottom of the transmission rod one is installed with an upper gear, and the top of the transmission rod two is provided with a lower gear meshing with the upper gear. The lower gear is vertically slidably connected to the transmission rod two, and a knocking mechanism is installed on the transmission rod two to drive the installation rod to vibrate through the rotation of the transmission rod two.

[0016] As a further solution of the present invention, the knocking mechanism includes a conduction disk vertically slidably connected to the conduction rod 2, and a protrusion fixed along the outer ring of the conduction disk, the protrusion corresponds to the top of the abutment rod, and the conduction disk is connected to the gear below.

[0017] As a further solution of the present invention, a plug rod is vertically inserted into the middle of the conduction rod 1, a receiving plate is fixed on the top of the plug rod, the bottom end of the plug rod passes through the upper gear and is connected to the lower gear, and a support spring is installed at the bottom of the lower gear.

[0018] As a further solution of the present invention, the support spring is embedded in the second conducting rod, and the top of the support spring is connected to the gear below.

[0019] As a further solution of the present invention, the conductive disk is a disc-shaped structure, and the outer ring of the conductive disk abuts against the inner wall of the mounting rod.

[0020] As a further solution of the present invention, a driving member is installed at the end of the adjusting screw to drive the adjusting screw to rotate.

[0021] The present invention adjusts the downtilt angle of the communication antenna module by controlling the adjustment seat to move vertically along the installation rod, and after adjusting the downtilt angle, uses the wind speed detection module to automatically detect the external environment. When it is determined that the wind speed of the external environment is too high, the control module controls the electromagnet to work, locks the position of the push rod, thereby limiting the top of the adjustment seat and generating a continuous downward force on the adjustment seat. The position of the adjustment seat is locked by adjusting the screw and the push rod, realizing automatic detection of the wind speed state, and controlling the locking state of the adjustment seat according to the wind speed. The downtilt angle adjustment device of the communication antenna module can be automatically locked in a strong wind environment, reducing the influence of strong wind on the installation stability of the communication antenna module, so that the module remains stable in a strong wind environment and the offset change of the downtilt angle is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the mounting rod and the adjustment seat in the present invention;

[0025] Figure 3 It is a schematic diagram of the internal structure of the mounting rod in the present invention;

[0026] Figure 4 This is a block diagram of the control principle of the regulating intelligent controller in the present invention;

[0027] Figure 5 This is a schematic diagram of the position structure of the conductive rod 1 and the conductive rod 2 in the present invention;

[0028] Figure 6 It is a schematic diagram of the position of the conducting plate after the receiving plate bears the weight in the present invention.

[0029] In the figure: 1. Mounting rod; 2. Single rod; 3. Communication antenna module; 4. Rotating seat; 5. Telescopic connecting rod; 6. Adjustment seat; 7. Adjustment intelligent controller; 8. Transmission rod 1; 9. Wind measuring disk; 10. Receiving disk; 11. Insertion rod; 12. Adjustment ring; 13. Connecting rod; 14. Guide rod; 15. Adjustment screw; 16. Push rod; 17. Electromagnet; 18. Volute spring; 19. Pressure sensor; 20. Ratchet assembly; 21. Upper gear; 22. Lower gear; 23. Transmission disk; 24. Transmission rod 2; 25. Support spring. DETAILED DESCRIPTION

[0030] Example 1

[0031] like Figures 1-4 As shown, a device for adjusting the downtilt angle of a communication antenna comprises: a mounting rod 1, a plurality of single poles 2 are mounted on the outer ring of the mounting rod 1, a communication antenna module 3 is mounted on each single pole 2, the lower end of the communication antenna module 3 is rotatably connected to the single pole 2 via a rotating seat 4, the upper end of the communication antenna module 3 is connected to the single pole 2 via a telescopic connecting rod 5, a plurality of communication antenna modules 3 are mounted on the corresponding single pole 2, and the downtilt angle of the communication antenna module 3 is adjusted by adjusting the angle between the communication antenna module 3 and the single pole 2, and further comprises: an adjustment seat 6, a support rod 16, a wind measuring disc 9 and an adjustment Intelligent controller 7; the adjustment seat 6 is vertically slidably connected to the mounting rod 1, and the middle part of the adjustment seat 6 is rotatably connected to the adjustment screw 15. The outer ring of the adjustment seat 6 is connected to the telescopic link 5 on the communication antenna module 3 through a control component. The telescopic link 5 is controlled to be telescopic by the vertical movement of the adjustment seat 6 to adjust the inclination angle of the communication antenna module 3. The vertical movement of the adjustment seat 6 is adjusted by controlling the rotation of the adjustment screw 15. The vertical movement of the adjustment seat 6 adjusts the telescopic length of the telescopic link 5, thereby adjusting the deflection of the communication antenna module 3 around the rotating seat 4 and adjusting the downward inclination angle of the communication antenna module 3.

[0032] It is worth mentioning that Figure 2 and Figure 3As shown, the supporting rod 16 is vertically plugged into the mounting rod 1, and the bottom of the supporting rod 16 is in contact with the top of the adjustment seat 6. An electromagnet 17 installed on the mounting rod 1 is provided on one side of the supporting rod 16. After adjusting the downward tilt angle of the communication antenna module 3 by moving the adjustment seat 6, the position of the adjustment seat 6 is limited, thereby locking the telescopic length of the telescopic link 5, so that the communication antenna module 3 remains stable after adjusting the downward tilt angle. During the vertical movement of the adjustment seat 6, the bottom of the supporting rod 16 is always in contact with it. At this time, the electromagnetic 17 is controlled to generate a magnetic attraction on the supporting rod 16. The supporting rod 16 is made of ferromagnetic metal. After being magnetically locked by the electromagnet 17, the supporting rod 16 remains motionless. At this time, the bottom of the supporting rod 16 is in contact with the adjustment seat 6, locking the position of the adjustment seat 6.

[0033] In addition, if Figure 3 and Figure 5 As shown, the wind measuring disc 9 is arranged on the top of the mounting rod 1, and the middle part of the wind measuring disc 9 is rotatably connected to the mounting rod 1 through the conduction rod 18. The lower part of the conduction rod 18 is connected to the middle part of the volute spring 18. The outer ring of the volute spring 18 is installed with a pressure sensor 19. When the outdoor wind speed increases, the strong wind will blow the wind measuring disc 9 to rotate, thereby driving the conduction rod 18 to rotate. The conduction rod 18 rotates to store force on the volute spring 18 through its bottom. The volute spring 18 accumulates elastic potential energy. The outer ring of the volute spring 18 that accumulates elastic potential energy generates continuous pressure on the pressure sensor 19. As the outdoor wind speed gradually increases, the pressure When the pressure value detected by the sensor 19 gradually increases and exceeds the set value, the position of the push rod 16 is locked by controlling the operation of the electromagnet 17, thereby limiting the top of the adjustment seat 6 and generating a continuous downward pressure on the adjustment seat 6. Since the adjustment seat 6 can only move vertically with the mounting rod 1 and cannot rotate, it does not rotate with the thread of the adjusting screw 15. The position of the adjustment seat 6 is locked by the joint action of the adjusting screw 15 and the push rod 16, and the downward tilt adjustment device of the communication antenna module 3 can be automatically locked in a strong wind environment, reducing the impact of strong winds on the installation stability of the communication antenna module 3.

[0034] In this embodiment, the regulating intelligent controller 7 is installed on the mounting rod 1. The regulating intelligent controller 7 is provided with a wind speed detection module and a control module. The wind speed detection module is respectively connected to the control module and the pressure sensor 19 signal, and the control module is connected to the electromagnet 17 signal. By rotating the adjusting screw 15 to adjust the position of the adjusting seat 6, the downward inclination angle of the communication antenna module 3 is adjusted. The strong wind blows the wind measuring disk 9 to rotate. At this time, the vortex spring 18 continues to accumulate elastic potential energy. The pressure sensor 19 detects the pressure value of the outer shell of the vortex spring 18 and feeds the pressure value back to the wind speed detection module. The wind speed detection module compares the received pressure value with the preset pressure threshold (the wind speed detection module is preset with a wind pressure threshold). When the wind speed exceeds the limit value, the pressure sensor 19 detects the corresponding pressure value) and compares it with the wind speed detection module. When the wind speed detection module determines that the pressure value exceeds the preset pressure threshold, it determines that the wind speed of the external environment is too large at this time. The wind speed detection module sends a locking signal to the control module. The control module controls the electromagnet 17 to work. The electromagnet 17 generates magnetic force and magnetically attracts the push rod 16, locks the position of the push rod 16, and then limits the position of the adjustment seat 6, realizes automatic detection of the wind speed state, and controls the locking state of the adjustment seat 6 according to the wind speed. It can automatically lock the downtilt angle adjustment device of the communication antenna module 3 in a strong wind environment, reducing the impact of strong wind on the installation stability of the communication antenna module 3.

[0035] See also Figure 1 The control component includes a guide rod 14 plugged into the outer ring of the adjustment seat 6 and an adjusting ring 12 sleeved with the single rod 2. The end of the guide rod 14 is rotatably connected to the adjusting ring 12. The outer ring of the adjusting ring 12 is rotatably connected to the corresponding position of the telescopic link 5 with a connecting rod 13. The end of the connecting rod 13 is rotatably connected to the central axis on the corresponding telescopic link 5. When the downtilt angle of the communication antenna module 3 needs to be adjusted, the vertical movement of the adjustment seat 6 is controlled to drive the guide rod 14 to move vertically, and then the adjusting ring 12 is controlled to move along the single rod 2. Since the guide rod 14 is plugged into the adjustment seat 6, when the adjusting ring 12 moves along the single rod 2, the guide rod 14 and the adjustment seat 6 are automatically driven to slide, so that the adjusting ring 12 can move stably along the single rod 2. When the adjusting ring 12 moves along the single rod 2, the adjusting ring 12 will push the central axis of the telescopic link 5 to move through the connecting rod 13, thereby adjusting the extension distance of the telescopic link 5 and adjusting the downtilt angle of the communication antenna module 3. Figure 1 In the double-link structure commonly used in the prior art, the distance between the two ends of the double-link can be adjusted by controlling the position of the central axis of the double-link, thereby adjusting the telescopic amount of the ends of the double-link.

[0036] Preferably, Figure 3As shown, the spiral spring 18 is installed in the middle part of the mounting rod 1, and a limit block fixed to the inner wall of the mounting rod 1 is provided on the outer side of the spiral spring 18. The pressure sensor 19 is installed between the limit block and the outer wall of the spiral spring 18. When the elastic potential energy accumulated in the spiral spring 18 is released, it will drive the outer shell of the spiral spring 18 to rotate and generate continuous pressure on the pressure sensor 19, so that it is convenient to stably detect the force exerted by the spiral spring 18 on it through the pressure sensor 19. A driving part is installed at the end of the adjusting screw 15 for driving the adjusting screw 15 to rotate, so that the adjusting screw 15 can be driven to rotate by the driving part, thereby driving the adjusting seat 6 to move vertically and adjust the downward tilt angle of the communication antenna module 3.

[0037] Example 2

[0038] Based on the first embodiment, Figure 3 、 Figure 5 and Figure 6 As shown, a ratchet assembly 20 is installed between the conduction rod 8 and the inner wall of the mounting rod 1 to limit the conduction rod 8 from rotating in one direction. When a strong wind blows the wind measuring disk 9 and drives the conduction rod 8 to rotate, the conduction rod 8 controls the vortex spring 18 to accumulate elastic potential energy. In order to prevent the vortex spring 18 from driving the conduction rod 8 in the reverse direction when the wind force is small, the ratchet assembly 20 limits the conduction rod 8 from rotating in the reverse direction, so that the vortex spring 18 continues to accumulate elastic potential energy.

[0039] In actual use environment, in winter environment, not only strong wind will affect the installation position of communication antenna module 3, but continuous snowfall outdoors will also gradually cover communication antenna module 3, which will not only affect the signal strength emitted by communication antenna module 3, but also cause the communication antenna module 3 to deviate, affecting its downward tilt angle. The lower section of the transmission rod 1 8 is designed as a transmission rod 2 24. The bottom of the transmission rod 2 24 is connected to the middle part of the spiral spring 18. The bottom of the transmission rod 1 8 is installed with an upper gear 21, and the top of the transmission rod 2 24 is provided with a lower gear 22 that meshes with the upper gear 21. The lower gear 22 is meshed with the transmission rod 2 24 is vertically slidably connected, and a knocking mechanism is installed on the transmission rod 24, which is used to drive the installation rod 1 to vibrate by rotating the transmission rod 24, and the transmission rod 1 8 rotates to drive the upper gear 21 to rotate, and drives the transmission rod 2 24 to rotate through the lower gear 22 engaged therewith, so that the spiral spring 18 accumulates elastic potential energy, and when it is necessary to remove snow from the communication antenna module 3, the lower gear 22 is controlled to move downward and disengage from the upper gear 21, and the knocking mechanism drives the installation rod 1 to vibrate, shaking off the snow on the communication antenna module 3, which can reduce the accumulation of snow on the communication antenna module 3, reduce the snow removal maintenance cycle of personnel, and reduce maintenance costs.

[0040] It is worth mentioning that Figure 5 and Figure 6As shown, the knocking mechanism includes a conduction disc 23 vertically slidably connected to the conduction rod 24, a convex block fixed along the outer ring of the conduction disc 23, the convex block corresponding to the top of the push rod 16, and the conduction disc 23 is connected to the gear 22 below. By controlling the conduction disc 23 to move downward and abut against the top of the push rod 16, the conduction rod 24 rotates and drives the conduction disc 23 to rotate. The conduction disc 23 controls the convex block to knock on the top of the push rod 16, thereby driving the push rod 16 to vibrate, and then driving the entire mounting rod 1 to vibrate to remove the accumulated snow. At the same time, during the vibration process, the conduction disc 23 is in a downward pressing state on the top of the push rod 16, which can be removed by the push rod 1 6 further locks the adjustment seat 6, thereby keeping the position of the adjustment seat 6 stable during the vibration snow removal process, so that the position of the communication antenna module 3 after adjusting the downtilt angle remains stable. The middle part of the conductive rod 8 is vertically plugged with a plug rod 11, and a receiving plate 10 is fixed on the top of the plug rod 11. The bottom end of the plug rod 11 passes through the upper gear 21 and is connected to the lower gear 22. A supporting spring 25 is installed at the bottom of the lower gear 22. When there is wind and snow outdoors, the strong wind will drive the wind measuring disc 9 to rotate and make the scroll spring 18 accumulate elastic potential energy. At this time, snow will also accumulate on the receiving plate 10. When the snow accumulates too much and reaches the preset value, such as Figure 6 As shown, the receiving plate 10 drives the insertion rod 11 to press down and pushes the lower gear 22 at the bottom to disengage from the upper gear 21. At this time, the lower gear 22 is not restricted, and the elastic potential energy of the spiral spring 18 is released and drives the transmission rod 24 and the lower gear 22 to rotate, thereby driving the transmission plate 23 to rotate. The rotating transmission plate 23 knocks the top of the rod 16 through the protrusion, and removes the snow on the communication antenna module 3 through vibration, thereby achieving the purpose of automatic snow removal and reducing personnel maintenance costs.

[0041] In this embodiment, if Figure 5As shown, the support spring 25 is embedded in the transmission rod 24, and the top of the support spring 25 is connected to the gear 22 below. By setting the support spring 25, a supporting force can be provided to the transmission plate 23. According to the snowfall intensity in different geographical locations, different types of support springs 25 can be replaced to adjust the supporting force on the transmission plate 23, thereby adjusting the weight of the heavy snow borne by the receiving plate 10, so that the receiving plate 10 compresses the support spring 25 after bearing the preset weight of heavy snow. At this time, the transmission plate 23 moves down and abuts against the top of the support rod 16, and after the snow on the receiving plate 10 synchronously vibrates and falls, the support spring 25 pushes the transmission plate 23 to move up and back Position, repeating the above operation can reduce the influence of snow accumulation on the adjustment device and the signal emitted by the communication antenna module 3 in a strong wind and snow environment. The conduction disk 23 is a disc-shaped structure. The outer ring of the conduction disk 23 abuts against the inner wall of the mounting rod 1. The conduction disk 23 can limit the position of the conduction rod 24, so that the conduction rod 24 is always located in the middle of the inner cavity of the mounting rod 1. When the conduction rod 24 rotates stably, the volute spring 18 is controlled to gradually accumulate elastic potential energy. When the weapon moves down along the conduction disk 23 along the conduction rod 24, the lower gear 22 is driven to disengage from the upper gear 21, and the elastic potential energy of the volute spring 18 is released to drive the conduction rod 24 to rotate stably.

Claims

1. A device for adjusting the downtilt angle of a communication antenna, comprising: A mounting rod, wherein a plurality of single rods are mounted on the outer ring of the mounting rod, a communication antenna module is mounted on each of the single rods, the lower end of the communication antenna module is rotatably connected to the single rod via a rotating seat, and the upper end of the communication antenna module is connected to the single rod via a telescopic connecting rod, characterized in that it also includes: An adjustment seat, the adjustment seat is vertically slidably connected to the mounting rod, the middle portion of the adjustment seat is rotatably connected to an adjustment screw, the outer ring of the adjustment seat is connected to the telescopic connecting rod on the communication antenna module through a control assembly, and the telescopic connecting rod is controlled to be extended and retracted by vertical movement of the adjustment seat to adjust the inclination angle of the communication antenna module; A push rod, the push rod is vertically plugged into the mounting rod, the bottom of the push rod is in contact with the top of the adjustment seat, and one side of the push rod is provided with an electromagnet mounted on the mounting rod; A wind measuring disc is arranged on the top of the mounting rod, the middle portion of the wind measuring disc is rotatably connected to the mounting rod via a first conducting rod, the lower portion of the first conducting rod is connected to the middle portion of a volute spring, and a pressure sensor is installed on the outer ring of the volute spring; An adjusting intelligent controller is installed on the mounting rod. A wind speed detection module and a control module are provided on the adjusting intelligent controller. The wind speed detection module is respectively connected to the control module and the pressure sensor signal, and the control module is connected to the electromagnet signal.

2. The device for adjusting the downtilt angle of a communication antenna according to claim 1, wherein: The regulating assembly includes a guide rod plugged into the outer ring of the adjusting seat and an adjusting ring sleeved with the single rod. The end of the guide rod is rotatably connected to the adjusting ring. The outer ring of the adjusting ring is rotatably connected to a connecting rod at a position corresponding to the telescopic connecting rod. The end of the connecting rod is rotatably connected to the central axis on the corresponding telescopic connecting rod.

3. The device for adjusting the downtilt angle of a communication antenna according to claim 1, wherein: The spiral spring is installed in the middle of the mounting rod. A limit block fixed to the inner wall of the mounting rod is provided on the outer side of the spiral spring. The pressure sensor is installed between the limit block and the outer wall of the spiral spring.

4. The device for adjusting the downtilt angle of a communication antenna according to claim 1, wherein: A ratchet assembly is installed between the transmission rod 1 and the inner wall of the installation rod to limit the transmission rod 1 from rotating in a single direction.

5. The device for adjusting the downtilt angle of a communication antenna according to claim 4, characterized in that: The lower part of the transmission rod one is designed as a segmented design, and the lower section of the transmission rod one is set as the transmission rod two. The bottom of the transmission rod two is connected to the middle part of the spiral spring. The bottom of the transmission rod one is installed with an upper gear, and the top of the transmission rod two is provided with a lower gear engaged with the upper gear. The lower gear is vertically slidably connected to the transmission rod two. The transmission rod two is installed with a knocking mechanism for driving the mounting rod to vibrate through the rotation of the transmission rod two.

6. The device for adjusting the downtilt angle of a communication antenna according to claim 5, characterized in that: The knocking mechanism includes a conduction disk vertically slidably connected to the conduction rod, and a convex block fixed along the outer ring of the conduction disk, the convex block corresponds to the top of the abutment rod, and the conduction disk is connected to the gear below.

7. The device for adjusting the downtilt angle of a communication antenna according to claim 6, characterized in that: A plug rod is vertically inserted into the middle of the transmission rod 1, a receiving plate is fixed on the top of the plug rod, the bottom end of the plug rod passes through the upper gear and is connected to the lower gear, and a support spring is installed at the bottom of the lower gear.

8. The device for adjusting the downtilt angle of a communication antenna according to claim 7, wherein: The support spring is embedded in the second transmission rod, and the top of the support spring is connected to the gear below.

9. The device for adjusting the downtilt angle of a communication antenna according to claim 7, wherein: The conductive disk is a disc-shaped structure, and the outer ring of the conductive disk abuts against the inner wall of the mounting rod.

10. The device for adjusting the downtilt angle of a communication antenna according to claim 1, wherein: A driving member is installed at the end of the adjusting screw to drive the adjusting screw to rotate.

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