WO2021135402A1 - Base station antenna, transmission device, switching mechanism and position selecting unit - Google Patents

Abstract

Disclosed are a base station antenna, a transmission device, a switching mechanism and a position selecting unit. The position selecting unit is applied to a multi-band antenna, and can facilitate an increase in frequency bands without making the volume of a transmission structure too large or making the transmission structure more complex. The switching mechanism uses the position selecting unit, and can drive output gears in at least two sets of output gear sets to rotate. The transmission device uses the switching mechanism, and can provide power for the adjustment of downward inclination angles of at least two antennas, thereby simplifying a transmission system. The base station antenna uses the transmission device to simplify a transmission system, and can adapt to an increase in antenna frequency bands, thereby facilitating an improvement in the reliability of the working performance of a multi-band antenna.

Description

Base station antenna, transmission device, switching mechanism and position selection unit Technical field

The present invention relates to the field of mobile communication technology, in particular to a base station antenna, a transmission device, a switching mechanism and a position selection unit.

Background technique

With the continuous increase in the number of mobile communication terminal users, there is an increasing demand for the network capacity of the sites in the mobile cellular network. At the same time, the interference between different sites and even between different sectors of the same site is required to be minimized, that is, to realize the network Maximize capacity and minimize interference. To achieve this goal, it is usually achieved by adjusting the downward tilt angle of the antenna beam on the station.

Among the two methods of adjusting the beam downtilt, mechanical downtilt and electronic downtilt, the advantage of electronic downtilt is obvious, which is the current mainstream and future development trend. The control of the electric downtilt angle is mainly divided into two categories: built-in and external, of which built-in control is the current and future mainstream.

However, when the traditional transmission device is applied to the electric downtilt adjustment of the multi-frequency antenna, there are still various defects, which are not conducive to improving the reliability of the multi-frequency antenna.

Summary of the invention

Based on this, it is necessary to provide a base station antenna, transmission device, switching mechanism, and location selection unit. The position selection unit is used in multi-frequency antennas, which can help increase the frequency band without causing the transmission structure to be too large or more complicated; the switching mechanism adopts the above position selection unit to achieve at least two sets of outputs The output gear in the gear set rotates; the transmission device adopts the above-mentioned switching mechanism, you can provide power for the adjustment of the downtilt angle of at least two antennas, simplifying the transmission system; the base station antenna adopts the above-mentioned transmission device, simplifying the transmission system, and The ability to adapt to the increase of antenna frequency bands is beneficial to improving the reliability of the working performance of the multi-frequency antenna.

The technical scheme is as follows:

On the one hand, the present application provides a position selection unit, including a mounting base; and a first transmission assembly, the first transmission assembly includes a driving wheel rotatably disposed on the mounting base, and a rotatably disposed on the mounting base At least one driven wheel on the seat, the driving wheel can drive all the driven wheels to rotate, the side of the driving wheel is provided with a first abutting part, and the side of the driven wheel is provided with a second abutting part.

When the above-mentioned position selection unit is used, the cooperation of the driving wheel and the driven wheel is used to form at least two abutting parts, which can more abut against the shaft of the output gear, so that more output gears can be powered in an effective space. . For example, the first abutment part can correspond to the shafts of 8 output gears, and the second abutment part can correspond to the shafts of 8 output gears. Through the rotation of the driving wheel and the driven wheel, any output gear of the 16 output gears can be realized. When the first abutment part or the second abutment part abuts against the shaft of the output gear, the output gear can be pushed into meshing with the transmission gear to realize power output. In the same way, in the case of the same size, more output gears can be abutted, which is beneficial to increase the frequency band, and will not cause the transmission structure to be too large or more complicated.

The technical solution is further explained below:

In one of the embodiments, the mounting seat is provided with a mounting cavity and a communication hole provided through a side wall of the mounting cavity, the first transmission assembly is built in the mounting cavity, and the communication hole is used for For the shaft for the output gear to pass through.

In one of the embodiments, when the first abutting portion abuts against the shaft of an output gear, the second abutting portion does not abut against the shaft of the output gear; when the second abutting portion abuts against the shaft of an output gear When conflicting, the first abutting portion does not conflict with the shaft of the output gear.

In one of the embodiments, the driving wheel is further provided with a plurality of first avoiding holes or at least one first strip hole, the first avoiding hole or the first strip hole and the first abutting portion Surrounded to form a ring; the driven wheel is also provided with a plurality of second avoiding holes or at least one second strip hole, the second avoiding hole or the second strip hole and the first abutting portion The enclosure forms a ring.

In one of the embodiments, the mounting seat is further provided with a second through hole and a third through hole, the second through hole corresponds to the first through hole, and the driven gear is provided with the The fourth through hole corresponding to the third through hole.

On the other hand, the present application provides a switching mechanism, including the position selection unit in the above embodiment, the first transmission assembly further includes a connecting shaft fixedly connected to the driving wheel, and the connecting shaft is provided with a first transmission shaft. A first through hole passing through, and an inner clamping portion provided in the first through hole, the inner clamping portion is used for detachably sleeved transmission cooperation with the first transmission shaft; the switching mechanism further includes :

An installation unit, the installation unit includes a first installation member and a second installation member, the first installation member and the second installation member are spaced apart to form a moving space for the position selection unit to move up and down;

A first transmission unit, the first transmission unit is used to drive the mounting base to move up and down; and

The second transmission unit, the second transmission unit includes a first transmission shaft and a second transmission shaft, the first transmission shaft rotatably penetrates the first through hole and the second through hole, and The first transmission shaft is provided with an outer clamping portion that is detachably sleeved and matched with the inner clamping portion, the second transmission shaft corresponds to the driven wheel one-to-one, and the second transmission shaft can be rotatably passed through In the third through hole and the fourth through hole;

Wherein, when the mounting seat moves down so that the inner card portion and the outer card portion are sleeved and matched for transmission, the first transmission shaft can drive the driving wheel to rotate; when the mounting seat moves up, When the inner locking part and the outer locking part are staggered, the first transmission shaft cannot drive the driving wheel to rotate.

When the above-mentioned switching mechanism is applied to a transmission device, the first transmission shaft and the first gear are integrally formed or connected by other existing connection means, so that the first transmission shaft can drive the first gear to rotate; similarly, the second transmission The shaft and the second gear are integrally formed or connected by other existing connecting means, so that the second transmission shaft can drive the second gear to rotate. The output gears of the same group are arranged at intervals along the outer circumference of the first gear, and belong to the same group. The output gears of the group are all arranged at intervals along the outer peripheral side of the second gear. When the output gear is in the initial state, the output gear is staggered with the first gear and the second gear; when the output gear is in the working state, that is, the mounting seat moves up, so that when the inner clamping part and the outer clamping part are staggered, the shaft body and The first abutment portion or the second abutment portion abuts, so that the output gear meshes with the corresponding first gear or the second gear. In this way, when the electric downtilt angle of a certain phase shifter needs to be adjusted, the first transmission shaft can be driven to rotate by the existing power source such as a motor or a rotary hydraulic cylinder, such as the inner and outer clamping parts are not covered. The first transmission unit drives the mounting seat to move, so that the inner clamping part and the outer clamping part are sleeved and engaged. At this time, the first transmission shaft can be used to drive the driving wheel to rotate, thereby making the first abutment or the second abutment The part is arranged below the output gear corresponding to the phase shifter; and then the first transmission unit is used to drive the mounting seat to move up, so that when the inner clamping part and the outer clamping part are staggered, the shaft body and the first abutting part or the second abutting part The abutment part abuts, so that the output gear meshes with the corresponding first gear or second gear, and then the first transmission shaft or the second transmission shaft is rotated correspondingly to achieve the rotation output power of the corresponding output gear, which is the phase shifter The movement of the media plate provides power, combined with other transmission structures to realize the movement of the media plate, and complete the adjustment of the downward inclination angle. The switching mechanism adopts the position selection unit described above, which can drive the output gears in at least two output gear sets to rotate, which simplifies the control circuit.

The technical solution is further explained below:

In one of the embodiments, the first transmission unit includes a screw rotatably arranged on the first mounting member, and a driver for driving the screw to rotate, and the mounting seat is provided with a screw matched with the screw. Internal threaded hole.

In one of the embodiments, a first limiting structure is provided between one end of the screw and the mounting seat, and a second limiting structure is provided between the other end of the screw and the first mounting member. The first limiting structure cooperates with the second limiting structure to limit the moving range of the mounting seat.

In one of the embodiments, the first transmission shaft includes a first shaft body and a second shaft body detachably sleeved and matched with the first shaft body for transmission, and the first shaft body is provided with the outer card Part, the second shaft body can be elastically reset;

Wherein, when the mounting seat moves down, so that the inner card portion and the outer card portion are sleeved and driven, the first shaft body is separated from the second shaft body; when the mounting seat moves up, The inner clamping part and the outer clamping part are staggered, and the first shaft body and the second shaft body are sleeved and matched for transmission.

In one of the embodiments, the second transmission unit further includes a second transmission component, and the second transmission component is used to drive the first transmission shaft and the second transmission shaft to rotate synchronously.

On the other hand, the present application also provides a transmission device, including the switching mechanism in any one of the above embodiments, and further including a first gear that is in transmission cooperation with the first transmission shaft, and is in transmission cooperation with the second transmission shaft. At least one second gear and at least two sets of output gear sets, each set of output gear sets includes at least one output gear that can be elastically reset, and the output gear may correspond to the first gear or the second gear Meshed, the output gear is provided with a shaft that abuts against the first abutting portion or the second abutting portion; when the output gear is in the initial state, the output gear and the first gear and The second gear is staggered; when the mounting seat moves upward so that the inner clamping portion and the outer clamping portion are staggered, the shaft body and the first abutting portion or the second abutting portion Conflict, so that the output gear meshes with the corresponding first gear or the second gear.

When the transmission device is used, the first transmission shaft and the first gear are integrally formed or connected by other existing connection means, so that the first transmission shaft can drive the first gear to rotate; in the same way, the second transmission shaft is connected to the second gear. The gears are integrally formed or connected by other existing connecting means, so that the second transmission shaft can drive the second gear to rotate. The output gears of the same group are arranged at intervals along the outer circumference of the first gear, and the output gears of the same group They are arranged at intervals along the outer peripheral side of the second gear. When the output gear is in the initial state, the output gear is staggered with the first gear and the second gear; when the output gear is in the working state, that is, the mounting seat moves up, so that when the inner clamping part and the outer clamping part are staggered, the shaft body and The first abutment portion or the second abutment portion abuts, so that the output gear meshes with the corresponding first gear or the second gear. In this way, when the electric downtilt angle of a certain phase shifter needs to be adjusted, the first transmission shaft can be driven to rotate by the existing power source such as a motor or a rotary hydraulic cylinder, such as the inner and outer clamping parts are not covered. The first transmission unit drives the mounting seat to move, so that the inner clamping part and the outer clamping part are sleeved and engaged. At this time, the first transmission shaft can be used to drive the driving wheel to rotate, thereby making the first abutment or the second abutment The part is arranged below the output gear corresponding to the phase shifter; and then the first transmission unit is used to drive the mounting seat to move up, so that when the inner clamping part and the outer clamping part are staggered, the shaft body and the first abutting part or the second abutting part The abutment part abuts, so that the output gear meshes with the corresponding first gear or second gear, and then the first transmission shaft or the second transmission shaft is rotated correspondingly to achieve the rotation output power of the corresponding output gear, which is the phase shifter The movement of the media plate provides power, combined with other transmission structures to realize the movement of the media plate, and complete the adjustment of the downward inclination angle. The transmission device adopts the above-mentioned switching mechanism to provide power for adjusting the downtilt angle of at least two antennas and simplify the transmission system.

In still another aspect, the present application also provides a base station antenna, including the transmission device in the foregoing embodiment.

The base station antenna adopts the above-mentioned transmission device, simplifies the transmission system, and can adapt to the increase of antenna frequency band, which is beneficial to improve the reliability of the working performance of the multi-frequency antenna and is beneficial to the development of antenna miniaturization.

Description of the drawings

Fig. 1 is a schematic structural diagram of a transmission device in an embodiment;

FIG. 2 is a schematic diagram of the structure of the transmission device shown in FIG. 1 with partial parts hidden;

Fig. 3 is a half-sectional schematic diagram of the transmission device shown in Fig. 1;

Figure 4 is a schematic diagram of the coordination of the position selection unit shown in Figure 1 with other transmission structures;

FIG. 5 is a schematic diagram of the structure of the bit selection unit shown in FIG. 4;

Fig. 6 is a schematic diagram showing the coordination of the position selection unit and other transmission structures in another embodiment.

Description of reference signs:

100. Position selection unit; 110, mounting seat; 111, mounting cavity; 112, communicating hole; 113, second through hole; 114, third through hole; 115, internal threaded hole; 120, first transmission component; 122, Driving wheel; 122a, first abutting portion; 122b, first avoiding hole; 124, driven wheel; 124a, second abutting portion; 124b, second avoiding hole; 124c, fourth through hole; 126, connecting shaft; 126a, First through hole; 126b, inner card part; 200, mounting unit; 210, first mounting part; 220, second mounting part; 300, first transmission unit; 310, screw rod; 400, second transmission unit; 410, The first transmission shaft; 412, the first shaft body; 414, the second shaft body; 402, the external clamping part; 420, the second transmission shaft; 430, the second transmission assembly; 500, the first gear; 600, the second gear ; 700, output gear set; 710, output gear; 712, shaft body.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

It should be noted that when an element is referred to as being "fixed to", "installed on", "fixed on" or "installed on" another element, it can be directly on the other element or there may also be a centered element. . When an element is considered to be "connected" to another element, it can be directly connected to the other element or an intermediate element may be present at the same time. Further, when one element is regarded as a "transmission connection" and another element, the two can be fixed by a detachable connection or a non-detachable connection, and only need to be able to achieve power transmission, such as socket, clip, One-piece molding, fixing, welding, etc., can be realized in the prior art, and it will not be redundant here. When a component and another component are perpendicular or nearly perpendicular to each other, it means that the ideal state of the two is perpendicular, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only, and are not meant to be the only embodiments.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the specification of the present invention herein is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and/or" as used herein includes any and all combinations of one or more related listed items.

The "first" and "second" involved in the present invention do not represent a specific number or order, but are merely used to distinguish names.

The adjustment of the downtilt angle of the base station antenna often relies on the phase shifter to adjust, and the actual adjustment process is to adjust the position of the dielectric plate in the phase shifter, that is, adjust the downtilt angle by moving the dielectric plate. At this time, it is necessary to use some transmission mechanisms to realize the movement of the media plate; at the same time, the power of the existing power equipment such as motors, linear motors, and pneumatic cylinders can be output at different positions through the transmission device.

As shown in Figures 1 to 3, the present application provides a transmission device that can realize power output of two or three power sources at different positions, and can continuously increase output terminals as needed, and is applied to multi-frequency antennas. , Which can simplify the transmission system and facilitate the development of antenna miniaturization. , Used in multi-frequency antennas, it can simplify the transmission system, which is conducive to the development of antenna miniaturization.

Each component of the transmission will be introduced one by one below.

As shown in FIGS. 3 to 6, in one embodiment, a position selection unit 100 is provided, which includes a mounting base 110 and a first transmission assembly 120. The first transmission assembly 120 includes a driving wheel rotatably disposed on the mounting base 110 122, and at least one driven wheel 124 rotatably arranged on the mounting seat 110, the driving wheel 122 can drive all the driven wheels 124 to rotate, the side of the driving wheel 122 is provided with a first abutment portion 122a, and the side of the driven wheel 124 is provided with The second abutment 124a.

When the above-mentioned position selection unit 100 is used, at least two abutting parts are formed by the cooperation of the driving wheel 122 and the driven wheel 124, so as to abut the shaft 712 of the output gear 710 (it can be the shaft of the gear shaft, or the shaft of the output gear 710). The drive shaft of the output gear), so that more output gears 710 can be powered in an effective space. For example, the first abutting portion 122a can correspond to the shafts 712 of the eight output gears 710, and the second abutting portion 124a can correspond to the shafts 712 of the eight output gears 710. Through the rotation of the driving wheel 122 and the driven wheel 124, 16 The abutment of any output gear 710 in the output gear 710, that is, when the first abutting portion 122a or the second abutting portion 124a abuts against the shaft of the output gear 710, the output gear 710 can be pushed into meshing with the transmission gear, Realize power output. In the same way, in the case of the same size, more output gears 710 can be abutted, which is beneficial to increase the frequency band, and will not cause the transmission structure to be too large or more complicated.

It should be noted that the first transmission assembly 120 can be a gear assembly. Correspondingly, the driving wheel 122 is a driving gear, and the driven wheel 124 is a driven gear, and the driving gear can directly mesh with the driven gear, or The driven gear is driven to rotate by other transmission gears; or the first transmission component 120 is a flexible transmission component, such as a belt transmission mechanism, a chain transmission mechanism, etc., and the driving wheel 122 corresponds to a belt pulley or a sprocket. That is, the first transmission assembly 120 can be designed and modified for any existing wheeled transmission mechanism that can meet the requirements. The technical solution with corresponding characteristics of the first transmission assembly 120 of the present application should be equivalent to or equivalent to the present application. The same technical solution.

It should be noted that "removable socket transmission coordination" belongs to one of the detachable transmission connection methods. It adopts the socket connection to realize the butt connection, and uses the non-circular hole and the corresponding column to realize the transmission coordination, but through the up and down The movement can separate the non-circular hole from the corresponding cylinder. For example, polygonal holes correspond to polygonal bodies, tooth-shaped holes and tooth bodies, and so on.

It should be noted that the first abutting portion 122a and the second abutting portion 124a are used to abut against the shaft of the output gear 710, so that the output gear 710 can mesh with the transmission gear (the first gear 500 or the second gear 600)

On the basis of the above embodiment, as shown in Figures 2 to 3, in one embodiment, the mounting base 110 is provided with a mounting cavity 111 and a communication hole 112 provided through a side wall of the mounting cavity 111, and the first transmission assembly 120 is built in the mounting cavity 111, and the communicating hole 112 is used for the shaft 712 of the output gear 710 to pass through. In this way, the installation cavity 111 facilitates the reliable installation of the first transmission component 120 and facilitates the lubrication of the first transmission component 120.

On the basis of any of the foregoing embodiments, in one embodiment, when the first abutting portion 122a abuts against the shaft of an output gear 710, the second abutting portion 124a does not abut against the shaft of the output gear 710; when the second abutting portion 122a abuts against the shaft of the output gear 710; When 124a abuts against the shaft of one output gear 710, the first abutting portion 122a does not abut against the shaft of the output gear 710. In this way, the first abutting portion 122a and the second abutting portion 124a do not simultaneously cooperate with the shaft of the output gear 710, which is beneficial to using the present position selection unit 100 to provide more power output.

It should be noted that the “first abutting portion 122a” and the “second abutting portion 124a” may be a convex structure protruding from the surface, or abutting structure formed by a groove or a hole with the wheel body, and so on.

On the basis of any of the above embodiments, as shown in FIG. 6, in one embodiment, the driving wheel 122 is further provided with a plurality of first avoiding holes 122b or at least one first strip hole (not shown). The avoiding hole 122b or the first strip-shaped hole and the first abutting portion 122a enclose to form a ring; the driven wheel 124 is also provided with a plurality of second avoiding holes 124b or at least one second strip-shaped hole (not shown). The two avoiding holes 124b or the second strip-shaped hole and the first abutting portion 122a are surrounded to form a circular ring. In this way, the avoiding hole and the bar-shaped hole can form corresponding abutting portions, so that when one of the output gears 710 abuts against the abutting portion, the other output gears 710 are inserted into the avoiding hole or the bar-shaped hole without being pushed up. The specific positions of the first avoiding hole 122b or the second avoiding hole 124b, and the first or second strip-shaped hole can be designed according to the arrangement position of the output gear 710, as long as the above requirements can be met.

The first strip-shaped hole and the second strip-shaped hole are arc-shaped. On the basis of any of the foregoing embodiments, as shown in FIG. 5, in one embodiment, the mounting seat 110 is further provided with a second through hole 113 and a third through hole 114, and the second through hole 113 and the first through hole 126a Correspondingly, the driven gear is provided with a fourth through hole 124c corresponding to the third through hole 114. In this way, it is convenient to insert the first transmission shaft 410 and the second transmission shaft 420, and the first transmission shaft 410 can be used to drive the driving wheel 122 to rotate.

It should be noted that the above-mentioned through holes may be formed directly or formed at intervals, that is, formed by using a bearing sleeve.

Based on the above embodiment of the position selection unit 100, as shown in FIGS. 1 to 4, in an embodiment, a transmission device is provided, including a switching mechanism (not labeled), a first gear 500, and at least one second Gear 600 and at least two output gear sets 700. among them:

The first transmission assembly further includes a connecting shaft 126 fixedly connected to the driving wheel 122. The connecting shaft 126 is in transmission connection with the driving wheel 122. The connecting shaft 126 is provided with a first through hole 126a for the first transmission shaft 410 to pass through, and is arranged at The inner clamping portion 126b in the first through hole 126a, the inner clamping portion 126b is used for detachably sleeved transmission cooperation with the first transmission shaft 410;

The switching mechanism includes the position selection unit 100 in the above embodiment, and also includes an installation unit 200, a first transmission unit 300, and a second transmission unit 400. The installation unit 200 includes a first installation member 210 and a second installation member 220. The mounting member 210 and the second mounting member 220 are spaced apart to form a moving space for the position selection unit 100 to move up and down; the first transmission unit 300 is used to drive the mounting base 110 to move up and down; the second transmission unit 400 includes a transmission connection with the first gear 500 The first transmission shaft 410 is connected to the second gear 600, and the second transmission shaft 420 is connected to the second gear 600. The first transmission shaft 410 rotatably penetrates the first through hole 126a and the second through hole 113, and the first transmission shaft 410 is provided with an outer card portion 402 that is detachably sleeved and matched with the inner card portion 126b. The second transmission shaft 420 corresponds to the driven wheel 124 one-to-one. The second transmission shaft 420 is rotatably penetrated through the third through hole 114 and the first Four through holes 124c.

Each output gear set 700 includes at least one output gear 710 that can be elastically reset. The output gear 710 can mesh with the corresponding first gear 500 or the second gear 600. The output gear 710 is provided with a first abutment portion 122a or a second gear 600. When the output gear 710 is in the initial state, the output gear 710 is offset from the first gear 500 and the second gear 600.

Wherein, when the mounting seat 110 is moved down so that the inner card portion 126b and the outer card portion 402 are in a sleeved transmission fit, the first transmission shaft 410 can drive the driving wheel 122 to rotate, and at this time, when the output gear 710 is in the initial state, the output The gear 710 is offset from the first gear 500 and the second gear 600.

When the mounting seat 110 moves upward so that the inner locking portion 126b and the outer locking portion 402 are staggered, the first transmission shaft 410 cannot drive the driving wheel 122 to rotate, and the shaft 712 of the output gear is in contact with the first abutting portion or the second abutting portion. The contact portion abuts, so that the output gear 710 meshes with the corresponding first gear 500 or second gear 600.

When the transmission device is used, the first transmission shaft 410 and the first gear 500 are integrally formed or connected by other existing connection means, so that the first transmission shaft 410 can drive the first gear 500 to rotate; similarly, the second transmission The shaft 420 and the second gear 600 are integrally formed or connected by other existing connecting means, so that the second transmission shaft 420 can drive the second gear 600 to rotate. The output gears 710 of the same group are all along the outer circumference of the first gear 500 The output gears 710 of the same group are all arranged at intervals along the outer peripheral side of the second gear 600. When the output gear 710 is in the initial state, the output gear 710 is staggered with the first gear 500 and the second gear 600; when the output gear 710 is in the working state, the mounting seat 110 moves up, so that the inner card portion 126b and the outer card portion When 402 is out of phase, the shaft 712 abuts against the first abutting portion or the second abutting portion, so that the output gear 710 meshes with the corresponding first gear 500 or the second gear 600. In this way, when the electric downtilt angle of a certain phase shifter needs to be adjusted, the first transmission shaft 410 can be driven to rotate by an existing power source such as a motor or a rotary hydraulic cylinder, such as the inner card portion 126b and the outer card portion If 402 is not sleeved and engaged, the first transmission unit 300 drives the mounting base 110 to move, so that the inner clamping portion 126b and the outer clamping portion 402 are sleeved and matched. At this time, the first transmission shaft 410 can be used to drive the driving wheel 122 to rotate, and then The first abutting portion 122a or the second abutting portion 124a is arranged below the output gear 710 corresponding to the phase shifter; and then the first transmission unit 300 is used to drive the mounting seat 110 to move upward, so that the inner clamping portion 126b and the outer clamping portion 126b When 402 is out of phase, the shaft 712 abuts against the first abutting portion or the second abutting portion, so that the output gear 710 meshes with the corresponding first gear 500 or the second gear 600, and then rotates the first transmission shaft 410 or The second transmission shaft 420 can realize the rotation output power corresponding to the output gear 710 without driving the driving wheel 122 to rotate. At this time, it provides power for the movement of the medium plate of the phase shifter, and realizes the movement of the medium plate in combination with other transmission structures. Complete the downward tilt adjustment. The transmission device can provide power for the adjustment of the downtilt angles of at least two antennas and simplify the transmission system.

It should be noted that the connecting shaft 126 and the driving wheel 122 may be integrally formed and manufactured, or may be manufactured separately and assembled together.

In one embodiment, the output gears 710 of a set of output gear sets 700 are arranged at even intervals along the outer peripheral side of the first gear 500, and the output gears 710 of a set of output gear sets 700 are arranged at even intervals along the outer peripheral side of the second gear 600.

In one embodiment, a guiding structure (not labeled) is provided between the output gear 710 and the first gear 500 or the second gear 600 to facilitate the introduction during plug-in meshing.

The first transmission unit 300 can be implemented in a variety of ways, such as directly selecting reciprocating telescopic power output equipment, such as air cylinders, linear motors, hydraulic cylinders, etc.; or rotating power equipment (such as servo motors) + screw nuts Transmission mechanism, or rotary power equipment (such as servo motor) + rack and pinion transmission mechanism, or rotary power equipment + conveyor belt mechanism (such as belt mechanism or chain mechanism, etc.) to achieve indirect reciprocating telescopic movement, as long as it can meet the requirements of use , There is no restriction here.

As shown in FIG. 2, in the specific embodiment, the first transmission unit 300 includes a screw 310 rotatably arranged on the first mounting member 210, and a driver for driving the screw 310 to rotate, and the mounting seat 110 is provided with the screw 310 Matching internal threaded hole 115. In this way, a driver (motor or rotary hydraulic cylinder) is used to directly or indirectly drive the screw 310 to rotate, so as to provide power for the mounting base 110 to move up and down.

It is understandable that the first transmission shaft 410 and the second transmission shaft 420 are inserted into the mounting base 110 to play a guiding role, so that the mounting base 110 can only move up and down along the axis of the screw 310.

Further, in an embodiment, a first limiting structure (not marked) is provided between one end of the screw 310 and the mounting seat 110, and a second limiting structure (not shown) is provided between the other end of the screw 310 and the first mounting member 210 Mark), the first limiting structure and the second limiting structure cooperate to limit the moving range of the mounting seat 110. The specific implementation of the first limiting structure and the second limiting structure can be implemented in the prior art, and will not be described in detail here.

On the basis of any of the foregoing transmission device embodiments, as shown in FIG. 3, in one embodiment, the first transmission shaft 410 includes a first shaft body 412 and a first shaft body 412 detachably sleeved and matched for transmission. Two shaft bodies 414, the first shaft body 412 is provided with an outer card portion 402, and the second shaft body 414 is in transmission connection with the first gear 500;

Wherein, when the mounting seat 110 moves down, the inner card portion 126b and the outer card portion 402 are sleeved and driven, and the first shaft body 412 is separated from the second shaft body 414; when the mounting seat 110 moves up, the inner card portion 126b and The outer clamping parts 402 are staggered, and the first shaft body 412 and the second shaft body 414 are sleeved and matched for transmission. In this way, by using the detachable socket fitting of the first shaft body 412 and the second shaft body 414, when the mounting seat 110 is moved down, the inner clamping portion 126b and the outer clamping portion 402 are sleeved and matched for transmission, and the first shaft 412 and the second shaft The two shafts 414 are separated. At this time, rotating the first shaft 412 can drive the driving wheel 122 to rotate, but will not drive the first gear 500 to rotate, which is beneficial to improve the reliability of transmission.

In the same way, the second transmission shaft 420 may also adopt a split structure to realize the transmission cooperation and separation of the second gear 600.

On the basis of any of the foregoing transmission device embodiments, as shown in FIGS. 2 and 3, in one embodiment, the second transmission unit 400 further includes a second transmission assembly 430, and the second transmission assembly 430 is used to drive the first The transmission shaft 410 and the second transmission shaft 420 rotate synchronously. In this way, the second transmission assembly 430 can drive the first transmission shaft 410 and the second transmission shaft 420 to rotate synchronously with only one power device.

The second transmission component 430 includes, but is not limited to, a gear transmission component (as shown in FIG. 2), a pulley transmission component, a chain transmission component, and the like.

In an embodiment, a base station antenna is also provided, which includes the transmission device in any of the above embodiments.

The base station antenna adopts the above-mentioned transmission device, simplifies the transmission system, and can adapt to the increase of antenna frequency band, which is beneficial to improve the reliability of the working performance of the multi-frequency antenna and is beneficial to the development of antenna miniaturization.

At present, for ultra-multi-band antennas, with the increase of frequency bands, for example, after the frequency is greater than 8, the volume of the traditional transmission device will greatly increase. For example, the various frequency bands in the transmission device are circularly distributed, and the more frequency bands, the larger the diameter. Moreover, as the frequency band increases, the frequency selection time of the transmission device will greatly increase, and problems such as slow response speed will also affect the reliability of the performance of the multi-frequency antenna. Compared with the prior art, this application has the following advantages and beneficial effects:

1. It can control the adjustment of the electric downtilt angle of at least two antennas with only two power sources, which can greatly reduce the cost when applied to multi-frequency antennas.

2. The transmission device can realize the unitized design and production, which greatly improves the production efficiency and the reliability of the transmission system.

3. The structure of the transmission device is very compact, and it can adapt to the increase of the antenna frequency band by expanding the driving gear and output shaft, which will not cause the transmission structure to be too large or the transmission structure more complicated, and the overall rotation efficiency is basically unchanged, which is beneficial Improve the reliability of the working performance of the multi-frequency antenna.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present invention, and their description is relatively specific and detailed, but they should not be understood as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (12)

A bit selection unit, characterized in that it comprises: Mounting seat; and The first transmission assembly, the first transmission assembly includes a driving wheel rotatably arranged on the mounting seat, and at least one driven wheel rotatably arranged on the mounting seat, and the driving wheel can drive all the The driven wheel rotates, the side surface of the driving wheel is provided with a first abutting portion, and the side surface of the driven wheel is provided with a second abutting portion. The position selection unit according to claim 1, wherein the mounting seat is provided with a mounting cavity and a communication hole provided through a side wall of the mounting cavity, and the first transmission assembly is built in the mounting cavity. In the cavity, the communicating hole is used for the shaft of the output gear to pass through. The position selection unit according to claim 1, wherein when the first abutting portion abuts against the shaft of an output gear, the second abutting portion does not abut against the shaft of the output gear; when the second abutting portion abuts against the shaft of the output gear; When the abutting portion abuts against the shaft of one output gear, the first abutting portion does not abut the shaft of the output gear. The position selection unit according to claim 1, wherein the driving wheel is further provided with a plurality of first avoiding holes or at least one first strip hole, the first avoiding hole or the first strip hole The hole and the first abutting portion are arranged at intervals along the same circumference; the driven wheel is also provided with a plurality of second avoiding holes or at least one second strip hole, the second avoiding hole or the second strip hole And the first abutting portion is arranged at intervals along the same circumference. The position selection unit according to any one of claims 1 to 4, wherein the mounting seat is further provided with a second through hole and a third through hole, the second through hole and the first through hole Correspondingly, the driven gear is provided with a fourth through hole corresponding to the third through hole. A switching mechanism, characterized in that it comprises the position selection unit according to claim 5, the first transmission assembly further comprises a connecting shaft fixedly connected to the driving wheel, and the connecting shaft is provided for the first transmission shaft to pass through. The first through hole passed through, and an inner clamping portion provided in the first through hole, the inner clamping portion is used for detachably sleeved transmission cooperation with the first transmission shaft; the switching mechanism further includes: An installation unit, the installation unit includes a first installation member and a second installation member, the first installation member and the second installation member are spaced apart to form a moving space for the position selection unit to move up and down; A first transmission unit, the first transmission unit is used to drive the mounting base to move up and down; and The second transmission unit, the second transmission unit includes a first transmission shaft and a second transmission shaft, the first transmission shaft rotatably penetrates the first through hole and the second through hole, and The first transmission shaft is provided with an outer clamping portion that is detachably sleeved and matched with the inner clamping portion, the second transmission shaft corresponds to the driven wheel one-to-one, and the second transmission shaft can be rotatably passed through In the third through hole and the fourth through hole; Wherein, when the mounting seat moves down so that the inner card portion and the outer card portion are sleeved and matched for transmission, the first transmission shaft can drive the driving wheel to rotate; when the mounting seat moves up, When the inner locking part and the outer locking part are staggered, the first transmission shaft cannot drive the driving wheel to rotate. The switching mechanism according to claim 6, wherein the first transmission unit includes a screw rotatably arranged on the first mounting member, and a driver for driving the screw to rotate, and the mounting seat It is provided with an internal threaded hole matched with the screw. The switching mechanism according to claim 7, wherein a first limit structure is provided between one end of the screw and the mounting seat, and a second end is provided between the other end of the screw and the first mounting member. Two limiting structures, the first limiting structure and the second limiting structure cooperate to limit the moving range of the mounting seat. The switching mechanism according to claim 6, wherein the first transmission shaft comprises a first shaft body and a second shaft body detachably sleeved and matched with the first shaft body, and the first shaft The body is provided with the outer card portion, and the second shaft body can be elastically reset and set; Wherein, when the mounting seat moves down, so that the inner card portion and the outer card portion are sleeved and driven, the first shaft body is separated from the second shaft body; when the mounting seat moves up, The inner clamping part and the outer clamping part are staggered, and the first shaft body and the second shaft body are sleeved and matched for transmission. The switching mechanism according to claim 6, wherein the second transmission unit further comprises a second transmission assembly, and the second transmission assembly is used to drive the first transmission shaft and the second transmission shaft to synchronize Perform rotation. A transmission device, characterized by comprising the switching mechanism according to any one of claims 6 to 10, and further comprising a first gear which is matched with the first transmission shaft in transmission, and is matched with the second transmission shaft in transmission. At least one second gear and at least two sets of output gear sets, each set of output gear sets includes at least one output gear that can be elastically reset, and the output gear may correspond to the first gear or the second gear Meshed, the output gear is provided with a shaft that abuts against the first abutting portion or the second abutting portion; when the output gear is in the initial state, the output gear and the first gear and The second gear is staggered; when the mounting seat moves upward so that the inner clamping portion and the outer clamping portion are staggered, the shaft body and the first abutting portion or the second abutting portion Conflict, so that the output gear meshes with the corresponding first gear or the second gear. A base station antenna, characterized by comprising the transmission device according to claim 11.

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