CN211605413U

CN211605413U - Antenna, transmission device and switching mechanism

Info

Publication number: CN211605413U
Application number: CN201922491109.0U
Authority: CN
Inventors: 黄潮生; 段红彬; 游建军; 刘培涛
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-29
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses an antenna, transmission and switching mechanism, include: the screw rod, output gear and guide, the screw rod can be set up rotatably, the output gear has internal threaded hole cooperating with screw drive of the screw rod; when the guide piece is fixed relative to the screw rod, the guide piece is in guide fit with the output gear; when the guide piece rotates relative to the screw rod, the guide piece can drive the output gear to rotate, so that the output gear and the screw rod can synchronously rotate in the same direction. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the multi-frequency antenna. The antenna adopts the transmission device, and has better reliability compared with the prior art.

Description

Antenna, transmission device and switching mechanism

Technical Field

The utility model relates to the field of communication technology, especially, relate to an antenna, transmission and switching mechanism.

Background

With the increasing number of mobile communication terminal users, the demand for network capacity of stations in a mobile cellular network is increasing, and it is required to minimize interference between different stations, even between different sectors of the same station, that is, to maximize network capacity and minimize interference. This is usually achieved by adjusting the downtilt angle of the antenna beam at the station.

In the two ways of adjusting the beam downtilt angle, namely, mechanical downtilt and electronic downtilt, the advantage of electronic downtilt is obvious, and the method is currently a mainstream and future development trend. The control of the electrical downtilt angle mainly includes two major categories, namely an internal control and an external control, wherein the internal control is the mainstream at present and in the future.

However, the motors used to drive the phase shifters in the conventional transmission device still correspond to the transmission mechanisms of the phase shifters one-to-one, the number of the motors is not reduced, and the number of the driving circuits in the control module is not reduced as the number of the motors. If the frequency bands of the antenna are increased, the structure of the transmission system is more complex and heavy, which affects the reliability of the multi-frequency antenna.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for an antenna, an actuator and a switching mechanism. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the multi-frequency antenna. The antenna adopts the transmission device, and has better reliability compared with the prior art.

The technical scheme is as follows:

on one hand, the application provides a switching mechanism, which comprises a screw, an output gear and a guide piece, wherein the screw is rotatably arranged, and the output gear is provided with an internal thread hole matched with the screw in a spiral transmission manner; when the guide piece is fixed relative to the screw rod, the guide piece is in guide fit with the output gear; when the guide piece rotates relative to the screw rod, the guide piece can drive the output gear to rotate, so that the output gear and the screw rod can synchronously rotate in the same direction.

When the switching mechanism is used, corresponding parts are arranged on the preset position of the equipment, and power output or transmission is performed by utilizing the output gear. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide piece is fixed relative to the screw rod, the guide piece is used as a guide structure of the output gear, the screw rod is rotated, and then the output gear can be driven to move along the axial direction of the screw rod, so that the output gear is meshed with the input gear of the phase shifter. And then the guide piece rotates relative to the screw rod, and then the guide piece and the screw rod rotate simultaneously, so that the output gear and the screw rod synchronously rotate in the same direction, the output gear cannot slide relative to the axis of the screw rod and synchronously rotate in the same direction along with the screw rod, and the input gear is driven to rotate to provide power for the movement of the dielectric slab. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output.

The technical solution is further explained below:

in one embodiment, the switching mechanism further comprises a mounting unit, and the screw is rotatably arranged on the mounting unit.

In one embodiment, the guide member is rotatably disposed on the mounting unit, the guide member is sleeved on the screw rod, and the guide member is slidably connected with the output gear.

In one embodiment, the screw has a first drive end and the guide has a second drive end offset from the first drive end.

In one embodiment, the switching mechanism further comprises a linkage member movable relative to the mounting unit; when the linkage piece is located at the first position, the first transmission end can rotate, and the second transmission end can not rotate; or the first transmission end can not rotate, and the second transmission end can rotate; when the linkage piece is in the second position, the first transmission end and the second transmission end can synchronously and coaxially move through the linkage piece.

In one embodiment, the first transmission end is a first transmission gear, the second transmission end is a second transmission gear, the linkage member is provided with an inner gear ring structure and an outer gear ring structure, the inner gear ring structure can be meshed with the first transmission gear and the second transmission gear, and the mounting unit is provided with a limiting member in rotation stopping fit with the outer gear ring structure.

In one embodiment, the first transmission end is disposed at one end of the screw, and the second transmission end is disposed adjacent to the other end of the screw.

In one embodiment, the guide member is provided with a guide slot along its length and the output gear is provided with a conductor in sliding engagement with the guide slot.

On the other hand, the application also provides a transmission device, which comprises the switching mechanism in any one of the embodiments, and further comprises a first switching mechanism, wherein the first switching mechanism comprises at least two first transmission shafts arranged along the length direction of the screw rod, and gear units in one-to-one correspondence with the first transmission shafts, the first transmission shafts are rotatably arranged on the mounting unit, and one ends of the first transmission shafts are provided with driven bevel gears; the gear unit comprises a driving bevel gear and a first driven gear used for driving the driving bevel gear to rotate, the driving bevel gear and the first driven gear can be rotatably arranged on the mounting unit, the driving bevel gear can drive the corresponding driven bevel gear to rotate, and the output gear can selectively drive the first driven gear to rotate.

When the transmission device is used, corresponding parts are installed on the installation unit, at least two first transmission shafts are arranged along the length direction of the screw rod, the output gear moves along the axis of the screw rod, and the output gear can be meshed with the corresponding first driven gear according to adjustment requirements. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide piece is fixed relative to the screw rod, the guide piece is used as a guide structure of the output gear, the screw rod is rotated, and then the output gear can be driven to move along the axial direction of the screw rod, so that the output gear is meshed with the first driven gear. And then the guide piece rotates relative to the screw rod, and then the guide piece and the screw rod are simultaneously rotated, so that the output gear and the screw rod synchronously rotate in the same direction, the output gear cannot slide relative to the axis of the screw rod and synchronously rotate in the same direction along with the screw rod, the first driven gear is driven to rotate, the driven bevel gear is driven to rotate through the driving bevel gear, the first transmission shaft is driven to rotate, and power is provided for the movement of the medium plate by utilizing the first transmission shaft. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the antenna.

On the other hand, the present application further provides a transmission device, which includes the switching mechanism in any of the above embodiments, and further includes a second switching mechanism, where the second switching mechanism includes at least two second transmission shafts arranged at intervals along an outer circumference of the output gear, the second transmission shafts are provided with second driven gears engaged with the output gear, and the second driven gears are arranged at intervals along an axial direction of the screw.

When the transmission device is used, corresponding parts are installed on the installation unit, at least two second transmission shafts are arranged along the outer periphery of the output gear at intervals, the second driven gears are arranged along the axial direction of the screw at intervals, the output gear moves along the axial direction of the screw, and the output gear can be meshed with the corresponding second driven gears according to adjustment requirements. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide piece is fixed relative to the screw rod, the guide piece is used as a guide structure of the output gear, the screw rod is rotated, and then the output gear can be driven to move along the axial direction of the screw rod, so that the output gear is meshed with the second driven gear. And then the guide piece rotates relative to the screw rod, and then the guide piece and the screw rod rotate simultaneously, so that the output gear and the screw rod synchronously rotate in the same direction, the output gear cannot slide relative to the axis of the screw rod and synchronously rotate in the same direction along with the screw rod, the driven gear is driven to rotate, the driven bevel gear is driven to rotate through the driving bevel gear, the second transmission shaft is driven to rotate, and power is provided for the movement of the medium plate by the second transmission shaft. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the antenna.

In another aspect, the present application further provides an antenna including the transmission device in any of the above embodiments.

The antenna adopts the transmission device, and has better reliability compared with the prior art.

Drawings

FIG. 1 is a schematic diagram of a transmission in one embodiment;

FIG. 2 is a schematic diagram of a transmission in one embodiment;

FIG. 3 is a schematic structural view of the first output mechanism shown in FIG. 1;

FIG. 4 is a partially enlarged view of B shown in FIG. 3;

fig. 5 is a schematic structural view (with the mounting unit hidden) of the switching mechanism shown in fig. 1 or 2;

FIG. 6 is a schematic front view of the switching mechanism shown in FIG. 5;

FIG. 7 is a schematic half-section view of the switching mechanism shown in FIG. 6;

fig. 8 is a partially enlarged schematic view of a shown in fig. 1.

Description of reference numerals:

100. a switching mechanism; 110. a mounting unit; 112. a limiting member; 120. a screw; 122. a first transmission end; 130. an output gear; 132. an internally threaded bore; 134. a conductor; 140. a guide member; 142. a second transmission end; 144. a guide groove; 150. a linkage member; 152. an inner gear ring structure; 154. an outer gear ring structure; 200. a first output mechanism; 210. a first drive shaft; 220. a driven bevel gear; 230. a gear unit; 232. a drive bevel gear; 234. a first driven gear; 202. a first introduction part; 300. a second output mechanism; 310. a second drive shaft; 320. a second driven gear.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

It will be understood that when an element is referred to as being "secured to," "disposed on," "secured to," or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Further, when one element is considered as being in "transmission connection" with another element, the two elements can be fixed in a detachable connection mode or in an undetachable connection mode, and power transmission can be achieved, such as sleeving, clamping, integrally-formed fixing, welding and the like, and can be achieved in the prior art, so that the two elements are not redundant. When an element is perpendicular or nearly perpendicular to another element, it is desirable that the two elements are perpendicular, but some vertical error may exist due to manufacturing and assembly effects. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, 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 belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The references to "first" and "second" in the present invention do not denote any particular quantity or order, but rather are merely used to distinguish one name from another.

The adjustment of the down tilt angle of the antenna is often performed by means of a phase shifter, and the position of the dielectric plate in the phase shifter is adjusted in the actual adjustment process, that is, the down tilt angle is adjusted by moving the dielectric plate. At this time, some transmission mechanisms are needed to realize the movement of the medium plate; meanwhile, the power of the existing power equipment such as the motor, the linear motor, the pneumatic cylinder and the like can be output at different positions through the transmission device.

As shown in fig. 1 to fig. 2, the present application provides a transmission device, which can realize power output of two power sources at different positions, and can continuously increase output ends as required, and is applied to a multi-frequency antenna, so as to simplify a transmission system and facilitate the miniaturization development of the antenna.

The transmission of the present application is described below.

As shown in fig. 1, in one embodiment, a transmission device is provided, which includes a switching mechanism 100 and a first switching mechanism. The switching mechanism 100 can convert two powers into a plurality of powers to be output, and the first switching mechanism can convert the powers into powers which can be conveniently provided to each phase shifter, and provide the powers for the transmission mechanism of the phase shifter.

Referring to fig. 5 to 7 together, the switching mechanism 100 includes a mounting unit 110, a screw 120, an output gear 130 and a guide 140, wherein the screw 120 is rotatably disposed on the mounting unit 110, and the output gear 130 is provided with an internal threaded hole 132 in screw-driving engagement with the screw 120; when the guide 140 is fixed relative to the mounting unit 110 (i.e., fixed relative to the screw 120), the guide 140 is in guiding engagement with the output gear 130; when the guide 140 rotates relative to the mounting unit 110 (i.e., rotates relative to the screw 120), the output gear 130 and the screw 120 are enabled to rotate synchronously and in the same direction.

As shown in fig. 3 to 4, the first conversion mechanism includes at least two first transmission shafts 210 arranged along the length direction of the screw 120, and gear units 230 corresponding to the first transmission shafts 210 one by one, the first transmission shafts 210 are rotatably installed on the installation unit 110, and one end of the first transmission shafts 210 is provided with a driven bevel gear 220; the gear unit 230 includes a driving bevel gear 232 and a first driven gear 234 for driving the driving bevel gear 232 to rotate, both the driving bevel gear 232 and the first driven gear 234 are rotatably mounted on the mounting unit 110, the driving bevel gear 232 can drive the corresponding driven bevel gear 220 to rotate, and the output gear 130 can selectively drive the first driven gear 234 to rotate.

When the transmission is used, corresponding parts are mounted on the mounting unit 110, at least two first transmission shafts 210 are arranged along the length direction of the screw 120, and the output gear 130 moves along the axis of the screw 120 and can be engaged with the corresponding first driven gear 234 according to adjustment requirements. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide 140 is fixed relative to the mounting unit 110, and the guide 140 is used as a guide structure of the output gear 130, so that the screw 120 is rotated, and the output gear 130 is driven to move along the axial direction of the screw 120 (i.e., the screw drives the nut to move along the length direction of the screw), so that the output gear 130 is engaged with the first driven gear 234. Then, the guide member 140 rotates relative to the mounting unit 110, and then the guide member 140 and the screw 120 rotate simultaneously, so that the output gear 130 and the screw 120 rotate synchronously, the output gear 130 does not slide relative to the axis of the screw 120, and rotates synchronously and in the same direction with the screw 120, and drives the first driven gear 234 to rotate, and drives the driven bevel gear 220 to rotate through the driving bevel gear 232, and further drives the first transmission shaft 210 to rotate, and the first transmission shaft 210 is used for providing power for the movement of the dielectric slab. The transmission device adopts the switching mechanism 100, which is beneficial to simplifying the transmission structure, so that the transmission mechanism of the phase shifter can be arranged at intervals along the axial direction of the screw rod 120, and the reliability of the antenna can be improved.

As shown in fig. 2, in another embodiment, an actuator is provided, which includes a switching mechanism 100 and a second switching mechanism. The switching mechanism 100 can convert two powers into a plurality of powers to be output, and the second switching mechanism can convert the powers into powers which can be conveniently supplied to the respective phase shifters and supplies the powers to the transmission mechanisms of the phase shifters.

Referring to fig. 5 to 7 together, the switching mechanism 100 includes a mounting unit 110, a screw 120, an output gear 130 and a guide 140, wherein the screw 120 is rotatably disposed on the mounting unit 110, and the output gear 130 is provided with an internal threaded hole 132 in screw-driving engagement with the screw 120; when the guide 140 is fixed relative to the mounting unit 110 (i.e., fixed relative to the screw 120), the guide 140 is in guiding engagement with the output gear 130; when the guide 140 is rotated with respect to the mounting unit 110 (i.e., rotated with respect to the screw 120), the output gear 130 is allowed to rotate synchronously in the same direction as the screw 120.

The second conversion mechanism includes at least two second transmission shafts 310 arranged at intervals along the outer circumference of the output gear 130, the second transmission shafts 310 are provided with second driven gears 320 engaged with the output gear 130, and the second driven gears 320 are arranged at intervals along the axial direction of the screw 120.

When the transmission device is used, corresponding parts are installed on the installation unit 110, at least two second transmission shafts 310 are arranged at intervals along the outer circumference of the output gear 130, the second driven gears 320 are arranged at intervals along the axial direction of the screw rod 120, and the output gear 130 moves along the axial direction of the screw rod 120 and can be meshed with the corresponding second driven gears 320 according to adjustment requirements. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide 140 is fixed with respect to the mounting unit 110, and the guide 140 is used as a guide structure of the output gear 130, so that the screw 120 is rotated, and the output gear 130 is moved along the axial direction of the screw 120, so that the output gear 130 is engaged with the second driven gear 320. Then, the guide member 140 rotates relative to the mounting unit 110, and then the guide member 140 and the screw 120 rotate simultaneously, so that the output gear 130 and the screw 120 rotate synchronously and in the same direction, the output gear 130 does not slide relative to the axis of the screw 120, and rotates synchronously and in the same direction with the screw 120, and drives the driven gear to rotate, and drives the driven bevel gear 220 to rotate through the driving bevel gear 232, and further drives the second transmission shaft 310 to rotate, and the second transmission shaft 310 is used for providing power for the movement of the dielectric slab. The transmission device adopts the switching mechanism 100, which is beneficial to simplifying the transmission structure, so that the transmission mechanism of the phase shifter can be arranged at intervals along the outer circumference of the output gear 130, and the reliability of the antenna can be improved.

The "mounting unit 110" may be any mounting structure capable of mounting the above-described components, such as a mounting bracket, a mounting seat, and a mounting case.

In addition, in the present embodiment, relevant parts of the switching mechanism 100 are integrated into the mounting unit 110, which facilitates modular assembly. In other embodiments, the relevant parts of the switching mechanism 100 can be installed at the preset position of the device to achieve the above-mentioned functions.

It should be noted that the aforementioned matching relationship between the drive bevel gear 232 and the driven bevel gear 220 and between the drive bevel gear 232 and the first driven gear 234 includes, but is not limited to, direct engagement transmission, and may also be indirect engagement transmission, that is, power transmission is performed by using other gears.

In addition, the two states of "the guide 140 is fixed with respect to the mounting unit 110 (i.e., fixed with respect to the screw 120)" and "the guide 140 is rotated with respect to the mounting unit 110 (i.e., rotated with respect to the screw 120)" are switched, and in practice, the two states include, but are not limited to, the guide 140 is rotatably connected with the mounting unit 110, and the guide 140 is fixed or rotated by using a locking structure (the locking structure includes mechanical locking and also includes electrically controlled locking); or the guide 140 may be rotatably coupled to the mounting unit 110, and the guide 140 may be fixed or rotated by a power device.

In addition to any of the above embodiments, as shown in fig. 4, in an embodiment, the first lead-in portions 202 are disposed on both sides of the gear teeth of the first driven gear 234, and two adjacent first lead-in portions 202 cooperate to form a first lead-in groove. Therefore, the first leading-in part 202 is used for forming the first leading-in groove, so that the gear teeth of the driven gear can be conveniently led into the gear teeth of the output gear 130, the meshing between the gear teeth and the gear teeth is smoother, the switching is smoother, and the phenomenon of blocking can be avoided.

Similarly, in an embodiment, two sides of the gear teeth of the output gear 130 are provided with second guiding portions (not labeled), and two adjacent second guiding portions cooperate to form a second guiding groove (not labeled). The gear teeth of the driven gear can be led into the gear teeth of the driving gear, so that the gear teeth and the driving gear can be meshed more smoothly, the switching is smoother, and the phenomenon of jamming can be avoided.

The first introduction portion 102 or the second introduction portion may have a rounded or reverse tapered structure.

Similarly, the second driven gear 320 may also adopt the above-mentioned leading-in portion structure.

In addition to any of the above embodiments, as shown in fig. 1 or fig. 2, in an embodiment, the guide 140 is rotatably disposed on the mounting unit 110, the guide 140 is sleeved on the screw rod 120, and the guide 140 is slidably connected to the output gear 130. In this way, the guide 140, the screw 120 and the output gear 130 can be compactly mounted on the mounting unit 110, which is advantageous in reducing the size of the transmission.

Specifically, the rotation center line of the guide 140, the rotation center line of the screw 120, and the rotation center line of the output gear 130 are on the same straight line, so that the transmission accuracy between the three is higher.

Of course, in other embodiments, the guiding element 140 may be spaced apart from the screw 120 and directly or indirectly drive the output gear 130 to rotate, or serve as a guiding structure for the output gear 130. If the guide 140 is a gear, the guide is a guide structure of the output gear 130 when the guide 140 is not moved; when the guide 140 is movable, the output gear 130 can be driven to rotate synchronously and in the same direction as the screw 120.

In addition to any of the above embodiments, as shown in fig. 8, in one embodiment, the screw 120 is provided with a first transmission end 122, and the guide 140 is provided with a second transmission end 142 offset from the first transmission end 122. Thus, the screw rod 120 can be driven to rotate by driving the first transmission end 122 to rotate, and the screw rod 120 can be driven to rotate by driving the second transmission end 142 to rotate, so that the power equipment can be conveniently arranged on the mounting unit 110.

The specific structures of the first transmission end 122 and the second transmission end 142 can be set according to actual needs, such as non-cylindrical structures such as a tooth-shaped structure and a polygonal structure.

Further, as shown in fig. 7 and 8, in an embodiment, the switching mechanism 100 further includes a linkage member 150, and the linkage member 150 is movable relative to the mounting unit 110; when the linkage 150 is in the first position, the first transmission end 122 may rotate and the second transmission end 142 may not rotate; or the first transmission end 122 may not rotate and the second transmission end 142 may rotate; when the linkage 150 is in the second position, the first transmission end 122 and the second transmission end 142 are enabled to move synchronously and coaxially through the linkage 150. Thus, the linkage member 150 can be driven by the first power device to switch between the first position and the second position, and the second power device directly or indirectly drives the first transmission end 122. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the link 150 is located at the first position, the guide 140 is fixed with respect to the mounting unit 110, the guide 140 is used as a guide structure of the output gear 130, the screw 120 is rotated, and the output gear 130 is moved along the axial direction of the screw 120, so that the output gear 130 is engaged with the input gear of the phase shifter. Then, the link 150 is set at the second position, the guide 140 rotates relative to the mounting unit 110, and then the guide 140 and the screw rod 120 are simultaneously rotated, so that the output gear 130 and the screw rod 120 rotate synchronously and coaxially, thereby enhancing the power for the movement of the dielectric plate.

This first power equipment can be for can providing the existing equipment of flexible power, like linear electric motor, pneumatic cylinder etc.. The second power device may be an existing device capable of providing rotational power, such as a servo motor, a rotary hydraulic cylinder, or the like. Further, as shown in fig. 1, 5 and 8, in an embodiment, the first transmission end 122 is a first transmission gear, the second transmission end 142 is a second transmission gear, the linkage 150 is provided with an inner gear ring structure 152 and an outer gear ring structure 154, the inner gear ring structure 152 can be engaged with the first transmission gear and the second transmission gear, and the mounting unit 110 is provided with a limiting member 112 in rotation-stopping fit with the outer gear ring structure 154. Thus, when the linkage member 150 is located at the first position, the inner gear ring structure 152 of the linkage member 150 is engaged with the second transmission gear, and meanwhile, the outer gear ring structure 154 is in rotation-stopping fit with the limiting member 112, so that the second transmission end 142 is fixed, at this time, the first transmission end 122 can rotate, and the second transmission end 142 cannot rotate; when the link 150 is at the second position, the ring gear structure 152 is engaged with the first transmission gear and the second transmission gear at the same time, and at this time, the first transmission end 122 can drive the second transmission end 142 to rotate, so as to form a mechanical synchronization structure, so that the screw rod 120, the guide 140 and the output gear 130 rotate synchronously.

In another embodiment, the first transmission end 122 is disposed at one end of the screw 120, and the second transmission end 142 is disposed near the other end of the screw 120. Thus, one power device, which may be a servo motor, is used to drive the rotation of the screw 120 and the other power device is used to drive the rotation of the guide 140.

In addition to any of the above embodiments, as shown in fig. 5 to 7, in one embodiment, the guide member 140 is provided with a guide groove 144 along the length direction thereof, and the output gear 130 is provided with the conductor 134 slidably engaged with the guide groove 144. In this way, the output gear 130 is slidably engaged with the guide 140 by the engagement of the conductor 134 and the guide groove 144, and the output gear 130 and the screw 120 can be driven by the guide 140 to synchronously rotate in the same direction. In one embodiment, an antenna is provided, which includes the actuator of any of the above embodiments. The antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of the frequency range of the antenna, and is favorable for improving the reliability of the working performance of the multi-frequency antenna.

At present, for a super multi-band antenna, along with the increase of frequency bands, for example, after the frequency band is greater than 8 frequencies, the size of a traditional transmission device is greatly increased, for example, each frequency band in the transmission device is distributed in a circular ring shape, the frequency bands are more and the diameter is larger, and along with the increase of the frequency bands, the frequency selection time of the transmission device is also greatly increased, the response speed is slow, and the reliability of the working performance of the multi-band antenna is also influenced.

Compared with the prior art, the method has the following advantages and beneficial effects:

1. the adjustment of the electrical downtilt angles of at least two antennas can be controlled by only two power sources, and the antenna is applied to a multi-frequency antenna, so that the cost can be greatly reduced.

2. The transmission device can realize unit design and production, greatly improve the production efficiency and improve the reliability of a transmission system.

3. The structure of the transmission device is very compact, the transmission device can adapt to the increase of antenna frequency bands and only needs to expand the driving gear and the transmission shaft, the overlarge size of the transmission structure or the more complex transmission structure can not be caused, the overall rotation efficiency is basically unchanged, and the reliability of the working performance of the multi-frequency antenna is improved.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A switching mechanism, comprising:

the screw rod is rotatably arranged;

the output gear is provided with an internal threaded hole in spiral transmission fit with the screw; and

a guide in guiding engagement with the output gear when the guide is fixed relative to the screw; when the guide piece rotates relative to the screw rod, the guide piece can drive the output gear to rotate, so that the output gear and the screw rod can synchronously rotate in the same direction.

2. The switching mechanism of claim 1, further comprising a mounting unit, wherein the threaded rod is rotatably disposed to the mounting unit.

3. The switching mechanism of claim 2, wherein the guide is rotatably disposed on the mounting unit, the guide is sleeved on the threaded rod, and the guide is slidably coupled to the output gear.

4. The switching mechanism of claim 3, wherein the threaded rod has a first drive end and the guide has a second drive end offset from the first drive end.

5. The switching mechanism of claim 4, further comprising a linkage member movable relative to the mounting unit, wherein the threaded rod is provided with a connecting body disposed through the second drive end, and wherein one end of the connecting body is drivingly connected to the first drive end; when the linkage piece is in a first position, the first transmission end can rotate, and the second transmission end cannot rotate; or the first transmission end can not rotate, and the second transmission end can rotate; when the linkage piece is in the second position, the first transmission end and the second transmission end can synchronously and coaxially move through the linkage piece.

6. The switching mechanism according to claim 5, wherein the first transmission end is a first transmission gear, the second transmission end is a second transmission gear, the linkage member is provided with an inner gear ring structure and an outer gear ring structure, the inner gear ring structure is capable of being engaged with the first transmission gear and the second transmission gear, and the mounting unit is provided with a limiting member engaged with the outer gear ring structure in a rotation-stopping manner.

7. The switching mechanism of claim 4, wherein the first drive end is disposed at one end of the threaded rod and the second drive end is disposed proximate another end of the threaded rod.

8. The switching mechanism of any one of claims 2 to 7, wherein the guide member is provided with a guide slot along a length thereof, and the output gear is provided with a conductor in sliding engagement with the guide slot.

9. A transmission device, comprising the switching mechanism according to any one of claims 2 to 8, and further comprising a first switching mechanism including at least two first transmission shafts provided in a length direction of the screw, and gear units in one-to-one correspondence with the first transmission shafts, the first transmission shafts being rotatably installed in the mounting unit, one ends of the first transmission shafts being provided with driven bevel gears; the gear unit comprises a driving bevel gear and a first driven gear used for driving the driving bevel gear to rotate, the driving bevel gear and the first driven gear can be rotatably installed on the installation unit, the driving bevel gear can drive the corresponding driven bevel gear to rotate, and the output gear can selectively drive the first driven gear to rotate.

10. A transmission device comprising the switching mechanism according to any one of claims 2 to 8, and further comprising a second switching mechanism including at least two second transmission shafts provided at intervals along an outer periphery of the output gear, wherein the second transmission shafts are provided with second driven gears that mesh with the output gear, and the second driven gears are provided at intervals along an axial direction of the screw.

11. An antenna comprising an actuator device according to claim 9 or 10.