Antenna tilt adjustment device and base station antenna

Abstract

The present disclosure relates to the technical field of antennas, and particularly relates to an antenna downtilt angle adjusting device and a base station antenna, which comprises a mounting shell, a switching mechanism, a transmission mechanism, an electric adjusting mechanism and a self-locking mechanism, the switching mechanism comprises a switching support, a switching input gear combination and a compound gear, the last switching input gear of the switching input gear combination is engaged with the compound gear, a slot is arranged on the switching support, and a gear shifting knob matched with the slot is arranged on the compound gear; the number of the electric adjusting mechanism is multiple, and the end of the electric adjusting mechanism is provided with a first gear; the transmission mechanism comprises a transmission shaft, a transmission output gear, a position selection gear and a first transmission input gear; the transmission shaft is rotatably arranged in the mounting shell, the first transmission input gear is fixedly connected with the mounting shaft, the position selection gear is fixedly connected with the mounting shaft in the circumferential direction and slidably connected with the mounting shaft in the axial direction, and the position selection gear is connected with the switching support. The transmission speed is fast, and the motor precision requirement is not high.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of antennas, in particular to an antenna downtilt angle adjusting device and a base station antenna. BACKGROUND

[0002] The base station, i.e. a public mobile communication base station, is an interface device for mobile devices to access the Internet, and is also a form of a radio station. It is a wireless radio station that transmits and receives information between a mobile communication exchange center and a mobile phone terminal in a certain wireless coverage area. The base station and the terminal both transmit and receive signals through the antenna.

[0003] With the increasing number of mobile terminals, the demand for mobile communication base station antennas is also increasing. However, the resources of mobile base stations are limited, so it has become a trend to integrate multiple antennas together. For multi-frequency antennas, the current electrically adjustable mode is to use one downtilt angle adjusting device for each frequency band of antenna. The existing gear adjusting device generally uses a gear and rack mechanism or a screw and nut mechanism. The gear and rack mechanism has high transmission speed, but requires high control precision of the motor. The screw and nut mechanism has slow transmission speed, stable control, and low control precision of the motor, but for a transmission path with more routes, it takes a long time and has low efficiency. SUMMARY

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides an antenna downtilt angle adjusting device and a base station antenna.

[0005] The present disclosure provides an antenna downtilt angle adjusting device, comprising a mounting shell, a switching mechanism, a transmission mechanism, an electrically adjustable mechanism and a self-locking mechanism,

[0006] The switching mechanism comprises a switching support, a switching input gear combination and a compound gear. The switching support is movably arranged in the mounting shell. The last stage of the switching input gear combination is engaged with the compound gear. The switching support is provided with a slot. The compound gear is provided with a gear shifting dial matched with the slot. The gear shifting dial and the slot form a slot intermittent transmission mechanism.

[0007] The number of the electrically adjustable mechanisms is multiple. The multiple electrically adjustable mechanisms are arranged side by side. The end of the electrically adjustable mechanism is provided with a first gear.

[0008] The transmission mechanism comprises a transmission shaft, a transmission output gear, a position selection gear and a first transmission input gear, the number of the transmission output gears is equal to the number of the first gears, and the transmission output gears are engaged with the first gears one by one; the transmission shaft is rotatably arranged in the mounting shell, the position selection gear and the first transmission input gear are both sleeved on the mounting shaft, and the first transmission input gear is fixedly connected with the mounting shaft, the position selection gear is fixedly connected with the mounting shaft in the circumferential direction and is slidably connected with the mounting shaft in the axial direction, the position selection gear is connected with the switching support and can be selectively engaged with each transmission output gear when the switching support moves synchronously;

[0009] The self-locking mechanism is arranged corresponding to the transmission output gears and is used for locking the transmission output gears.

[0010] The switching support is provided with an unlocking part, and the unlocking part is used for unlocking the corresponding transmission output gear when the transmission output gear is engaged with the position selection gear.

[0011] In some embodiments, the self-locking mechanism comprises a self-locking piece and a return spring, the self-locking piece is arranged corresponding to the switching support and the transmission output gear, a first end of the self-locking piece is rotatably connected with the mounting shell, a second end of the self-locking piece is pressed on the transmission output gear through the return spring, a clamping groove is arranged on a side of the second end of the self-locking piece facing the transmission output gear, and the clamping groove is used for clamping the teeth of the transmission output gear.

[0012] In some embodiments, the unlocking part comprises a protruding part arranged on the upper surface of the switching support, and the protruding part is arranged corresponding to the position selection gear.

[0013] In some embodiments, inclined guide surfaces are arranged on both ends of the protruding part along the axial direction of the transmission shaft, and the guide surfaces are inclined to the center line of the protruding part in a direction away from the switching support.

[0014] In some embodiments, the return spring is arranged above the self-locking piece to provide downward pressure to the self-locking piece.

[0015] In some embodiments, the mounting shell is further provided with a mounting shaft, the mounting shaft is arranged in parallel with the transmission shaft, a plurality of transmission output gears are arranged on the mounting shaft in a spaced manner, and the transmission output gears are fixedly connected with the mounting shaft in the axial direction and rotatably connected with the mounting shaft in the circumferential direction.

[0016] In some embodiments, the number of the position selection gears is two, and the two position selection gears are respectively connected with two ends of the switching support.

[0017] In some embodiments, the switching support includes a support body and limiting blocks, the support body is provided with the slot, the limiting blocks are two, the limiting blocks are arranged at two ends of the support body and below the support body, and the limiting blocks are provided with limiting slots, and the selecting gear is rotatably installed in the limiting slots.

[0018] In some embodiments, the composite gear includes a rotating shaft, gear parts arranged along the axial direction of the rotating shaft, and the gear shifting dial, the gear shifting dial includes cylindrical pins and sector wheels arranged along the axial direction of the rotating shaft, the cylindrical pins are arranged on opposite sides of the sector wheels, and the gear parts are engaged with the last stage of the switching input gear combined with the switching input gear.

[0019] The slot includes arc-shaped slots and circular slots, the number of the arc-shaped slots and the circular slots is multiple, the arc-shaped slots are sequentially arranged along the axial direction of the transmission shaft, the circular slots are arranged along the axial direction of the transmission shaft, the arc-shaped slots are used for cooperating with the sector wheels, and the circular slots are used for cooperating with the cylindrical pins.

[0020] In some embodiments, the interval between two adjacent transmission output gears is an integer multiple of the interval between two adjacent circular slots.

[0021] In some embodiments, the interval between two adjacent transmission output gears is Y, the interval between two adjacent circular slots is X, the number of the selecting gears is N, and Y = N * X.

[0022] In some embodiments, the switching support is provided with the slot on both sides.

[0023] The second aspect of the application provides a base station antenna including the antenna downtilt angle adjusting device.

[0024] Compared with the prior art, the technical scheme provided by the embodiments of the present disclosure has the following advantages:

[0025] The antenna downtilt angle adjusting device provided by the embodiment of the application is characterized in that: a slot intermittent transmission mechanism is formed by switching the slot on the support and the switching dial on the composite gear, the transmission speed of the slot intermittent transmission mechanism is fast, and the precision requirement of the motor is not high. The selection gear is movably arranged on the transmission shaft, and when the switching support moves, the selection gear moves with the switching support and is selectively engaged with each transmission output gear. The self-locking mechanism is arranged in correspondence with the transmission output gear, and when the transmission output gear is not engaged with the selection gear, the transmission output gear is locked, and the rotation of the selection gear does not drive the locked transmission output gear to rotate, so that the corresponding electric adjusting mechanism of the locked transmission output gear is also fixed. The unlocking part is arranged on the switching support, and when the transmission output gear is engaged with the selection gear, the corresponding transmission output gear is unlocked, and after the transmission output gear is unlocked, the transmission output gear can be normally engaged with the selection gear, and when the selection gear rotates, the unlocked transmission output gear rotates correspondingly, thereby driving the corresponding electric adjusting mechanism to act. Each electric adjusting mechanism is connected with a group of antenna phase shifters, so that when the selection gear moves with the switching support, the selection gear can be selectively engaged with different transmission output gears, the transmission output gear is unlocked through the unlocking part, and the other transmission output gears are in the locked state under the action of the self-locking mechanism. Only one electric adjusting mechanism acts each time, the different electric adjusting mechanisms can be controlled by switching the position of the selection gear, and the adjustment of the multiple groups of antenna phase shifters is realized. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0028] Figure 1 The structural schematic diagram of the antenna downtilt angle adjusting device described in some embodiments of the application;

[0029] Figure 2 The structural schematic diagram of the antenna downtilt angle adjusting device described in some embodiments of the application (without the switching support);

[0030] Figure 3 The structural schematic diagram of the switching support and the composite gear cooperating in some embodiments of the application;

[0031] Figure 4Structure diagram of the locking state of the self-locking part and the transmission output gear for some embodiments of the present application;

[0032] Figure 5 Structure diagram of the self-locking part for some embodiments of the present application;

[0033] Figure 6 Layout diagram of the motor module for some embodiments of the present application;

[0034] Figure 7 Layout diagram of the motor module for some embodiments of the present application.

[0035] Among them, 101, switching rack; 102, switching input rod; 103, switching input gear; 104, composite gear; 104a, gear part; 104b, cylindrical pin; 104c, sector; 105, switching support; 105a, circular groove; 105b, arc-shaped groove; 105c, limiting block; 105d, protruding part; 201, transmission rack; 202, transmission input rod; 203, second transmission input gear; 204, first transmission input gear; 205, transmission shaft; 206, position selection gear; 207, transmission output gear; 208, mounting shaft; 301, screw rod; 302, first gear; 303, nut; 401, self-locking part; 402, return spring; 501, motor module. DETAILED DESCRIPTION

[0036] In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present disclosure, the schemes of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0037] In the following description, a lot of specific details are set forth in order to give a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other manners different from those described herein; obviously, the embodiments described in the specification are only some embodiments of the present disclosure, not all embodiments.

[0038] The introduction of 5G makes the resources of iron towers and sky surfaces increasingly scarce, and the demand of operators for multi-standard multi-band antennas is increasing day by day; multi-band antennas not only can greatly save sky surface resources, but also can reduce the construction and operation cost of base stations.

[0039] In order to realize better network coverage and reduce inter-cell interference, the electrical downtilt angles of each frequency band of the multi-band antenna need to be remotely and independently adjusted. At present, one adjustment method is to adjust each frequency band by using one motor respectively, which has become less and less competitive due to high cost; another adjustment method is to adjust multiple frequency bands by using two motors, which generally can only support six frequency bands for independent electrical adjustment, and also has the disadvantages of large size and being not conducive to the layout of the antenna structure.

[0040] Meanwhile, the existing adjusting device generally adopts the gear and gear meshing mode for transmission, the mechanical efficiency is low, and the gear meshing process also has certain unstable factors, which is more obvious in the process of high-speed adjustment.

[0041] In order to solve the above technical problems, the antenna downtilt angle adjusting device provided by the embodiment of the present application realizes the intermittent movement of the switching support through the slot wheel gap cooperation mode, and then adjusts different antenna phase shifters.

[0042] Specifically, as shown in Figures 1 to 7 The antenna downtilt angle adjusting device provided by the embodiment of the present application comprises:

[0043] The mounting shell, the switching mechanism, the transmission input mechanism, the transmission output mechanism and the self-locking mechanism, the switching mechanism comprises a switching support 105, a switching input gear combination and a compound gear 104, the switching support 105 is movably arranged in the mounting shell, the last switching input gear 103 of the switching input gear combination is meshed with the compound gear 104, the switching support 105 is provided with a slot, the compound gear 104 is provided with a gear shifting dial matched with the slot, and the gear shifting dial and the slot form a slot intermittent transmission mechanism;

[0044] The number of the electric adjusting mechanisms is multiple, the multiple electric adjusting mechanisms are arranged side by side, and the end of the electric adjusting mechanism is provided with a first gear 302;

[0045] The transmission mechanism comprises a transmission shaft 205, a transmission output gear 207, a selection gear 206 and a first transmission input gear 204, the number of the transmission output gears 207 is equal to the number of the first gears 302, and the transmission output gears 207 are meshed with the first gears 302 one by one; the transmission shaft 205 is rotatably arranged in the mounting shell, the selection gear 206 and the first transmission input gear 204 are sleeved on a mounting shaft 208, and the first transmission input gear 204 is fixedly connected with the mounting shaft 208; the selection gear 206 is connected with the switching support 105 and can be selectively meshed with each transmission output gear 207 when moving synchronously with the switching support 105;

[0046] The self-locking mechanism is arranged correspondingly with the transmission output gears 207 and is used for locking the transmission output gears 207;

[0047] The switching support 105 is provided with an unlocking part, and the unlocking part is used for unlocking the corresponding transmission output gear 207 when the transmission output gear 207 is meshed with the selection gear 206.

[0048] The antenna downtilt angle adjusting device provided by the embodiment of the application forms a slot intermittent transmission mechanism through switching the slot on the support 105 and the switching dial on the composite gear 104. The slot intermittent transmission mechanism has a high transmission speed and a low precision requirement for the motor compared with the gear and rack mechanism and the screw rod 301 nut 303 mechanism. The indexing gear 206 is movably arranged on the transmission shaft 205. When the support 105 moves, the indexing gear 206 moves with the support 105 and can be selectively engaged with each transmission output gear 207. The self-locking mechanism is arranged corresponding to the transmission output gear 207. When the transmission output gear 207 is not engaged with the indexing gear 206, the transmission output gear 207 is locked. The rotation of the indexing gear 206 does not drive the locked transmission output gear 207 to rotate. Therefore, the corresponding electric adjusting mechanism of the locked transmission output gear 207 is also fixed. The support 105 is provided with an unlocking part. When the transmission output gear 207 is engaged with the indexing gear 206, the corresponding transmission output gear 207 is unlocked. After the transmission output gear 207 is unlocked, the transmission output gear 207 can be normally engaged with the indexing gear 206. When the indexing gear 206 rotates, the unlocked transmission output gear 207 rotates correspondingly and drives the corresponding electric adjusting mechanism to act. Each electric adjusting mechanism is connected with a group of antenna phase shifters. Therefore, when the indexing gear 206 moves with the support 105, the indexing gear 206 can be switched to be engaged with different transmission output gears 207. The transmission output gear 207 is unlocked through the unlocking part. The other transmission output gears 207 are in the locked state under the action of the self-locking mechanism. Only one electric adjusting mechanism acts each time. The position of the indexing gear 206 can be switched to control different electric adjusting mechanisms, thereby adjusting a plurality of groups of antenna phase shifters.

[0049] Further, in some embodiments of the application, the self-locking mechanism includes a self-locking part 401 and a return spring 402. The self-locking part 401 corresponds to the upper part of the transmission output gear 207 and is transversely arranged between the support and the transmission output gear 207. The first end of the self-locking part 401 is rotatably connected to the mounting shell. The second end of the self-locking part 401 is pressed on the transmission output gear 207 through the return spring 402. The second end of the self-locking part 401 is provided with a clamping groove facing the side of the transmission output gear 207. The clamping groove is used for clamping the teeth of the transmission output gear 207.

[0050] Specifically, the self-locking piece 401 is in a strip shape, and the length direction of the self-locking piece 401 is perpendicular to the axial direction of the transmission shaft 205, the first end of the self-locking piece 401 is located on the side of the switching support 105 away from the transmission output gear 207, and is rotationally connected with the mounting shell, the second end is located above the transmission output gear 207, a reset spring 402 is arranged above the second end, the reset spring 402 is connected with the cover plate on the mounting shell, and the reset spring 402 provides downward pressure to the second end of the self-locking piece 401, so that the clamping groove on the second end of the self-locking piece 401 is clamped and fixed with the teeth on the transmission output gear 207, and the transmission output gear 207 is locked.

[0051] The number of the self-locking pieces 401 is equal to the number of the transmission output gears 207, and the self-locking pieces 401 are arranged in one-to-one correspondence with the transmission output gears 207, the unlocking part on the switching support 105 moves to the position corresponding to which self-locking piece 401 to unlock which self-locking piece 401, and then the corresponding transmission output gear 207 is unlocked, so that the selection gear 206 and the unlocked transmission output gear 207 can normally mesh and transmit power.

[0052] Further, in some embodiments of the present application, the self-locking mechanism includes a protruding part 105d arranged on the upper surface of the switching support 105, and the protruding part 105d is arranged in correspondence with the selection gear 206. That is, the protruding part 105d is located directly above the selection gear 206, when the selection gear 206 moves with the switching support 105 to the position corresponding to the first transmission output gear 207, the protruding part 105d can just lift the self-locking piece corresponding to the first transmission output gear 207 upward, so that the clamping groove on the second end of the self-locking piece is disengaged from the teeth of the transmission output gear 207, and the transmission output gear 207 is unlocked. At this time, when the selection gear 206 rotates, it can drive the first transmission output gear 207 to rotate, and then drive the first gear 302 engaged with the first transmission output gear 207 to rotate, and further drive the action of the electric adjustment mechanism, so as to realize the adjustment of the first group of antenna phase shifters corresponding to the first electric adjustment mechanism.

[0053] Further, in some embodiments of the present application, the protruding part 105d is provided with inclined guide surfaces at both ends along the axial direction of the transmission shaft 205, one end of the guide surface is connected with the top surface of the protruding part 105d, the other end is connected with the top surface of the switching support 105, and the guide surface is inclined to the center line of the protruding part 105d in a direction away from the switching support 105. That is, the protruding part 105d is formed to be small at the top and large at the bottom, when the switching support 105 moves to the position where the protruding part 105d touches a self-locking piece, the self-locking piece moves from top to bottom along the guide surface to the top surface of the protruding part 105d. The arrangement of the guide surface makes the self-locking piece not be stuck when it touches the self-locking piece, and plays a guiding role in the relative movement of the self-locking piece and the protruding part 105d.

[0054] Further, in some embodiments of the present application, the reset spring 402 is located above the self-locking piece 401 to provide downward pressure to the self-locking piece 401. Alternatively, the reset spring 402 can also be located below the self-locking piece 401 to provide downward tension to the self-locking piece 401. Depending on the location of the reset spring 402, the reset spring 402 is reasonably selected as a tension spring or a pressure spring.

[0055] Further, in some embodiments of the present application, the mounting shell further has a mounting shaft 208, which is arranged in parallel with the transmission shaft 205. The plurality of transmission output gears 207 are spaced apart and sleeved on the mounting shaft 208, and are fixed in the axial direction and rotatably connected in the circumferential direction with the mounting shaft 208.

[0056] Each transmission output gear 207 is independent of each other, and the rotation of one transmission output gear 207 does not affect the other transmission output gears 207, thereby achieving independent adjustment of the plurality of electric adjustment mechanisms.

[0057] Further, in some embodiments of the present application, the number of the selection gear 206 is two, and the two selection gears 206 are respectively connected with the two ends of the switching bracket 105. In the movement process of the switching bracket 105, the two selection gears 206 are alternately engaged with the transmission output gear 207, thereby shortening the stroke of the switching selection.

[0058] Of course, the number of the selection gear 206 can also be one, three or more, and the number of the transmission output gear 207 is multiple, and each transmission output gear 207 corresponds to at least one selection gear 206.

[0059] Further, in some embodiments of the present application, the switching bracket 105 includes a bracket body and a limiting block 105c. The bracket body is provided with a slot, which is arranged along the length direction of the bracket body. The length direction of the bracket body is parallel to the axial direction of the transmission shaft 205. The number of the limiting block 105c is two, and the two limiting blocks 105c are respectively arranged at the two ends of the length direction of the bracket body and located below the bracket body. The limiting block 105c is provided with a limiting slot, and the selection gear 206 is rotatably installed in the limiting slot.

[0060] Specifically, the slot of the limiting slot is towards the side wall of the mounting shell, the transmission shaft 205 passes through the limiting slot, the selection gear 206 is sleeved on the transmission shaft 205, and the selection gear 206 can rotate in the limiting slot and can move along the axial direction of the transmission shaft 205 with the switching bracket 105.

[0061] Further, in some embodiments of the present application, the composite gear 104 comprises a rotating shaft and gear portions 104a, cylindrical pins 104b and sector gears 104c arranged along the axial direction of the rotating shaft in sequence, the cylindrical pins 104b and the sector gears 104c constitute a shift dial, wherein the cylindrical pins 104b are arranged on opposite sides of the sector gears 104c, the gear portions 104a are engaged with the last stage of the shift input gear in the shift input gear set; the slot strip comprises arc-shaped slots 105b and circular slots 105a, the number of the arc-shaped slots 105b and the circular slots 105a is multiple, the multiple arc-shaped slots 105b are arranged along the axial direction of the transmission shaft 205 in sequence, the multiple circular slots 105a are arranged along the axial direction of the transmission shaft 205 in sequence and are used for cooperating with the sector gears 104c, and the circular slots 105a are used for cooperating with the cylindrical pins 104b.

[0062] Specifically, the slot strip and the shift dial can push the shift support 105 to move along the length direction through intermittent movement of the slot strip, and the principle is that the sector gears 104c are disengaged after rotating a certain angle along the arc-shaped slots 105b, the cylindrical pins 104b are cut into the circular slots 105a and push the cylindrical pins 104b to move axially a certain distance through circular motion, the cylindrical pins 104b are disengaged from the circular slots 105a, the sector gears 104c are cut into the arc-shaped slots 105b 3023, and so on, so as to push the shift support 105 to move intermittently along the length direction.

[0063] Further, in some embodiments of the present application, the distance between the adjacent two transmission output gears 207 is an integer multiple of the distance between the adjacent two circular slots 105a, so that the selection gear can be stably stopped at the position engaged with the transmission output gear 207 when the shift support 105 is intermittently stopped.

[0064] Further, in some embodiments of the present application, the distance between the adjacent two transmission output gears 207 is Y, the distance between the adjacent two circular slots 105a is X, and the number of the selection gears 206 is N, then Y=N×X. N is a positive integer, and N can be 1, 2, 3, 4 or more.

[0065] When the shift support 105 is intermittently stopped, only one selection gear is stopped at the position engaged with the transmission output gear 207 each time.

[0066] Further, in some embodiments of the present application, the slot strip is arranged on both sides of the shift support 105 in the width direction, so that the composite gear 104 can be matched with the slot strip on any side of the shift support 105, and the position of the motor module 501 is conveniently arranged.

[0067] Further, in some embodiments of the present application, the transmission mechanism further comprises a transmission input rod 202 and a second gear, the transmission input rod 202 is fixedly connected with a second transmission input gear 203, the second transmission input gear 203 is engaged with a first transmission input gear 204, the axial direction of the second transmission input gear 203 is perpendicular to the axial direction of the transmission shaft 205, the transmission input rod 202 is arranged along the axial direction of the second transmission input gear 203, the motor is connected with the transmission input rod 202 to drive the second transmission input gear 203 to rotate, and further drive the transmission shaft 205 to rotate, and further drive the selection gear 206 to rotate, and the transmission output gear 207 engaged with the selection gear 206 and the first gear 302 rotate in turn, and further drive the electric adjustment mechanism to act, so as to realize the adjustment of a group of antenna phase shifters.

[0068] The electric adjustment mechanism comprises a lead screw 301 connected with the first gear 302 and a nut 303 sleeved on the lead screw 301, and the antenna phase shifter is connected on the nut 303, when the first gear 302 rotates, the lead screw 301 is driven to rotate, and further drives the nut 303 to move linearly, and further adjusts the position of the antenna phase shifter.

[0069] Further, in some embodiments of the present application, the switching input gear combination comprises a switching input gear 103 and a switching input rod 102, the rotation axis of the compound gear 104 is arranged perpendicularly to the transmission shaft 205, the axial direction of the switching input gear 103 is arranged perpendicularly to the rotation shaft and the transmission shaft 205, and the axial direction of the switching input gear 103 is parallel to the axial direction of the second transmission input gear 203, the switching input rod 102 is fixedly connected with the switching input gear 103, the motor is connected with the switching input rod 102 to drive the switching input gear 103 and the compound gear 104 to rotate, and the intermittent motion mechanism of the slot and the gear shifting dial is used to realize the intermittent motion of the switching support 105.

[0070] In some embodiments of the present application, a total of 12 electric adjustment mechanisms are arranged, of which 6 electric adjustments are located on the left side, and 6 electric adjustment mechanisms are located on the right side, two selection gears 206 are arranged correspondingly with the 6 electric adjustment mechanisms on the left side and the electric adjustment mechanisms on the right side, for corresponding connection of the left selection gear 206 and the 6 electric adjustment mechanisms on the left side through the transmission output gear 207 when the switching support 105 moves, and corresponding arrangement of the right selection gear 206 and the 6 electric adjustment mechanisms on the right side for corresponding connection with the 6 electric adjustment mechanisms on the right side through the transmission output gear 207 when the switching support 105 moves; the left selection gear 206 and the right selection gear 206 are alternately selected during the movement of the switching support 105.

[0071] The motor module 501 is placed between the left electric adjusting mechanism and the right electric adjusting mechanism, facilitating the layout of the overall structure. Of course, in other embodiments, the 12 electric adjusting mechanisms can also be arranged without spacing.

[0072] The motor module 501 can be located on either side of the switching support 105. For example, as shown in FIG. 1, the motor module 501 is located between the left electric adjusting mechanism and the right electric adjusting mechanism. Figure 6 As shown in FIG. 1, the motor module 501 can also be located on the opposite side of the Figure 7 As shown in FIG. 1, the motor module 501 can also be located on the opposite side of the Figure 6 As shown in FIG. 1, the motor module 501 can also be located on the opposite side of the

[0073] The number of transmission output mechanisms is not limited to 12, and the number and layout can be reasonably adjusted according to actual needs.

[0074] Further, in some embodiments of the present application, the two side walls of the mounting shell in the length direction are respectively provided with a stop block, and when the switching support 105 moves to contact the stop block, the selection gear 206 is also blocked and stopped from rotating, so as to feedback the zero position of the switching support 105.

[0075] The mounting shell includes the switching rack 101 and the transmission rack 201. The number of the switching rack 101 is two, which is respectively arranged corresponding to the left six electric adjusting mechanisms and the right six electric adjusting mechanisms. The transmission rack 201 is located between the two switching racks 101 and is fixedly connected with the two switching racks 101. The transmission input rod 202 and the switching input rod 102 are both installed on the transmission rack 201.

[0076] Further, in some embodiments of the present application, a base station antenna is also provided, which includes the antenna downtilt angle adjusting device in the above embodiments.

[0077] The working action principle of the base station antenna is described in detail as follows:

[0078] The antenna downtilt angle adjusting device and the base station antenna provided by the embodiment of the application can drive the switching input rod 102 to rotate in the first direction or the second direction, drive the switching input gear 103 and the compound gear 104 to rotate in the corresponding rotation direction in sequence, drive the gear shifting dial on the compound gear 104 to cooperate with the slot of the switching support 105 to drive the switching support 105 to move in the first direction or the second direction intermittently, until the switching support 105 contacts the stop block on the mounting shell, indicating that the switching support 105 reaches the zero position, and then control the switching output rod to rotate for a set number of turns, thereby driving the selecting gear 206 to move in the axial direction of the transmission shaft 205, and enabling the selecting gear 206 to mesh with the first transmission output gear 207, and enabling the protruding part 105d on the switching support 105 to push the self-locking part 401 of the first transmission output gear 207, thereby unlocking the first transmission output gear 207.

[0079] When the first group of antenna phase shifters is adjusted, stop driving the transmission input rod 202, and drive the switching input rod 102 again, and drive another selecting gear to mesh with the second group of transmission output gears 207, and stop, and then drive the transmission input rod 202 to rotate in the first direction or the second direction, and enable the second group of antenna phase shifters to be adjusted according to the above process.

[0080] In this way, the switching input rod 102 can enable the two selecting gears 206 to selectively mesh with all the transmission input gears, and then drive the transmission input rod 202 to rotate in the first direction or the second direction, thereby enabling all the phase shifters to be adjusted one by one, and achieving the effect that two power sources can be used to adjust multiple phase shifters.

[0081] The antenna downtilt angle adjusting device provided by the embodiment of the application has the following beneficial effects:

[0082] 1) The antenna downtilt adjustment device provided in this embodiment uses a slotted intermittent motion mechanism to move and control the switching bracket 105, thereby precisely controlling the intermittent stopping position of the switching bracket 105. This ensures that the selection gear 206 is stably engaged with a transmission output gear 207 each time it stops intermittently. Simultaneously, the intermittent stroke allows for a larger allowable control error on the shift input lever. Compared to the lead screw 301 and nut 303 mechanism, it offers faster control; compared to the gear and rack mechanism, it has lower control precision requirements.

[0083] 2) The antenna downtilt adjustment device provided in this application embodiment has two selection gears 206. The two selection gears 206 always maintain a constant axial distance, ensuring that when one selection gear 206 is engaged with the transmission output gear 207, the other selection gear 206 is in an idle state. Each selection gear 206 controls half of the ESC mechanism in the shift adjustment device, which shortens the stroke and volume of the switching bracket 105.

[0084] 3) In the antenna downtilt adjustment device provided in the embodiments of the present invention, the gears, shafts, screws and other components used in the switching mechanism, transmission mechanism and electronic adjustment mechanism can all be designed with their axes on the same flat layer. In this way, the thickness of the entire shift adjustment device can be made very thin. Compared with the "cylindrical" layout or the solution with high spatial staggered stacking of shift components in the same field, it has a great advantage in height.

[0085] 5) Further, direction changes (such as...) Figure 7 As shown in the figure, the antenna downtilt adjustment device provided in this application embodiment can have the switching input rod 102 and the transmission input rod 202 arranged on either side of the transmission shaft 205 and the switching bracket 105. The motor module 501 and the control system components can also be connected to the antenna downtilt adjustment device on both sides. It can be adjusted according to the actual use and adapted to more antenna layouts.

[0086] 6) Further, length adjustment (such as...) Figure 7 As shown in the figure, the antenna downtilt adjustment device provided in this application embodiment can also be adjusted in length. The length of the adjustment device can be changed by simply replacing three components: the mounting base of different lengths, the switching bracket 105 and the drive shaft 205, to adapt to different antenna layouts.

[0087] 7) The antenna shifting adjustment device provided in this application embodiment has a compact and flat structure. It can selectively output multiple sets of power through two motor inputs. The layout is easy to adjust and change, which is conducive to the miniaturization, thinning and lightening of multi-frequency fusion antennas and more layout requirements.

[0088] It has to be noted that, in the present document, relational terms are intended only to convey a possible relationship between elements or

[0089] The above description is merely that of the specific embodiments of the present disclosure and therefore is not intended to limit the present disclosure. Various modifications made to the embodiments of the present disclosure will be apparent to those skilled in the art to which the present disclosure pertains, and such modifications are not to be interpreted within the scope or spirit of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein but will be construed to include all modifications, equivalents, and substitutes falling within the scope of the present disclosure.

Claims

1. An antenna downtilt adjustment device, characterized by, The transmission comprises a mounting shell, a switching mechanism, a transmission mechanism, an electric adjusting mechanism and a self-locking mechanism, The switching mechanism comprises a switching support (105) movably arranged in the mounting shell, a switching input gear combination and a compound gear (104), the last stage of the switching input gear combination is in mesh with the compound gear (104), the switching support (105) is provided with a slot, the compound gear (104) is provided with a gear shifting dial matched with the slot, and the gear shifting dial and the slot form a slot intermittent transmission mechanism. The electric adjusting mechanism is provided in multiple numbers, and the end of the electric adjusting mechanism is provided with a first gear (302). The transmission mechanism comprises a transmission shaft (205), transmission output gears (207), a position selecting gear (206) and a first transmission input gear (203), the number of the transmission output gears (207) is equal to that of the first gears (302), and the transmission output gears (207) are in one-to-one correspondence with the first gears (302) and in mesh with the first gears (302); the transmission shaft (205) is rotatably arranged in the mounting shell, the position selecting gear (206) and the first transmission input gear (203) are both sleeved on the transmission shaft (205), and the first transmission input gear (203) is fixedly connected with the transmission shaft (205); the position selecting gear (206) is fixedly connected with the transmission shaft (205) in the circumferential direction and is slidably connected with the transmission shaft (205) in the axial direction, the position selecting gear (206) is connected with the switching support (105) and can be selectively engaged with each transmission output gear (207) when the switching support (105) moves synchronously. The self-locking mechanism is arranged in correspondence with the transmission output gears (207) and is used for locking the transmission output gears (207). The switching support (105) is provided with an unlocking portion, and the unlocking portion is used for unlocking the corresponding transmission output gear (207) when the transmission output gear (207) is engaged with the position selecting gear (206).

2. The antenna tilt adjustment apparatus of claim 1, wherein, The self-locking mechanism comprises a self-locking piece (401) and a return spring (402), the self-locking piece (401) is correspondingly arranged above the switching support (105) and the transmission output gears (207), the first end of the self-locking piece (401) is rotatably connected with the mounting shell, the second end of the self-locking piece (401) is pressed on the transmission output gears (207) through the return spring (402), the second end of the self-locking piece (401) is provided with a clamping groove on the side facing the transmission output gears (207), and the clamping groove is used for clamping the teeth of the transmission output gears (207).

3. The antenna tilt adjustment apparatus of claim 1, wherein, The unlocking portion comprises a protruding portion (105d) arranged on the upper surface of the switching support (105), and the protruding portion (105d) is arranged in correspondence with the position selecting gear (206).

4. The antenna tilt adjustment apparatus of claim 3, wherein, The protruding part (105d) is provided with inclined guide surfaces at both ends of the axial direction of the transmission shaft (205), which are inclined to the center line of the protruding part (105d) in the direction away from the switching support (105).

5. The antenna tilt adjustment apparatus of claim 2, wherein, The reset spring (402) is located above the self-locking part (401) and provides downward pressure to the self-locking part (401).

6. The antenna tilt adjustment apparatus of claim 1, wherein The mounting shell is further provided with a mounting shaft (208) which is parallel to the transmission shaft (205), a plurality of transmission output gears (207) are arranged on the mounting shaft (208) in a sleeved manner, and the mounting shaft (208) is fixed in the axial direction and rotatably connected in the circumferential direction.

7. The antenna tilt adjustment apparatus of claim 1, wherein The number of the selection gears (206) is two, and the two selection gears (206) are respectively connected to both ends of the switching support (105).

8. The antenna tilt adjustment apparatus of claim 1, wherein, The switching support (105) comprises a support body and a limiting block (105c), the support body is provided with the slot, the number of the limiting blocks (105c) is two, the two limiting blocks (105c) are respectively arranged at both ends of the support body and located below the support body, the limiting blocks (105c) are provided with limiting slots, and the selection gears (206) are rotatably arranged in the limiting slots.

9. The antenna tilt adjustment apparatus of claim 7, wherein, The composite gear (104) comprises a rotating shaft, gear parts (104a) arranged in the axial direction of the rotating shaft, and a gear shifting dial, the gear shifting dial comprises cylindrical pins (104b) and sector gears (104c) arranged in the axial direction of the rotating shaft, the cylindrical pins (104b) are arranged on opposite sides of the sector gears (104c), and the gear parts (104a) are engaged with the last stage switching input gear (103) combined with the switching input gear. The slot comprises arc-shaped slots (105b) and circular slots (105a), the number of the arc-shaped slots (105b) and the circular slots (105a) is multiple, the arc-shaped slots (105b) are sequentially arranged in the axial direction of the transmission shaft (205), the circular slots (105a) are arranged in the axial direction of the transmission shaft (205) in a spaced manner, the arc-shaped slots (105b) are used for cooperating with the sector gears (104c), and the circular slots (105a) are used for cooperating with the cylindrical pins (104b).

10. The antenna tilt adjustment apparatus of claim 9, wherein, The interval between two adjacent transmission output gears (207) is an integer multiple of the interval between two adjacent circular slots (105a).

11. The antenna tilt adjustment apparatus of claim 10, wherein, The interval between two adjacent transmission output gears (207) is Y, the interval between two adjacent circular slots (105a) is X, the number of the selection gears (206) is N, and Y=N×X.

12. The antenna tilt adjustment apparatus of claim 1, wherein, Both sides of the switching support (105) are provided with slots.

13. A base station antenna, comprising: The antenna inclination angle adjusting device comprises the antenna inclination angle adjusting device according to any one of claims 1 to 12.

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