CN111129774A - Base station antenna, transmission device, switching mechanism and position selection unit - Google Patents
Base station antenna, transmission device, switching mechanism and position selection unit Download PDFInfo
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- CN111129774A CN111129774A CN201911416008.5A CN201911416008A CN111129774A CN 111129774 A CN111129774 A CN 111129774A CN 201911416008 A CN201911416008 A CN 201911416008A CN 111129774 A CN111129774 A CN 111129774A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/32—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by mechanical means
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Abstract
The invention discloses a base station antenna, a transmission device, a switching mechanism and a position selection unit, wherein the position selection unit is applied to a multi-frequency antenna, can be beneficial to increasing frequency bands and cannot cause the overlarge volume of a transmission structure or the more complex transmission structure; the switching mechanism adopts the position selecting unit to drive the output gears in at least two groups of output gear sets to rotate; the transmission device adopts the switching mechanism, can provide power for adjusting the downward inclination angles of at least two antennas, and simplifies a transmission system; the base station 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.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a base station antenna, a transmission device and a 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, when the conventional transmission device is applied to the electrical downtilt adjustment of the multi-frequency antenna, various defects still exist, which are not beneficial to improving the reliability of the multi-frequency antenna.
Disclosure of Invention
In view of the above, it is desirable to provide a base station antenna, an actuator, a switching mechanism and a position selecting unit. The position selection unit is applied to the multi-frequency antenna, so that the frequency band can be increased, and the phenomenon that the volume of a transmission structure is too large or the transmission structure is more complex can be avoided; the switching mechanism adopts the position selecting unit to drive the output gears in at least two groups of output gear sets to rotate; the transmission device adopts the switching mechanism, so that power can be provided for adjusting the downward inclination angles of the at least two antennas, and a transmission system is simplified; the base station 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.
The technical scheme is as follows:
in one aspect, the present application provides a site selection unit, including a mounting base; the first transmission assembly comprises a driving wheel and at least one driven wheel, the driving wheel is rotatably arranged on the mounting seat, the driven wheel is rotatably arranged on the mounting seat, the driving wheel can drive all the driven wheels to rotate, a first abutting portion is arranged on the side face of the driving wheel, and a second abutting portion is arranged on the side face of the driven wheel.
When the position selecting unit is used, at least two abutting parts are formed by matching the driving wheel and the driven wheel, and then more shaft bodies can be abutted to the output gears, so that power can be provided for more output gears in an effective space. If the first abutting portion can correspond to the shaft bodies of 8 output gears, the second abutting portion can correspond to the shaft bodies of 8 output gears, abutting of any output gear in the 16 output gears is achieved through rotation matching of the driving wheel and the driven wheel, namely when the first abutting portion or the second abutting portion abuts against the shaft bodies of the output gears, the output gears can be pushed into the shaft bodies to be meshed with the transmission gears, and power output is achieved. In a similar way, under the condition of the same size, more output gears can be abutted, the frequency band is increased favorably, and the overlarge size of the transmission structure or the more complex transmission structure cannot be caused.
The technical solution is further explained below:
in one embodiment, the mounting seat is provided with a mounting cavity and a communication hole which is arranged through one side wall of the mounting cavity, the first transmission assembly is arranged in the mounting cavity, and the communication hole is used for allowing a shaft body of the output gear to pass through.
In one embodiment, when the first butting part butts against the shaft of one output gear, the second butting part does not butt against the shaft of the output gear; when the second abutting part abuts against the shaft of one output gear, the first abutting part does not abut against the shaft of the output gear.
In one embodiment, the driving wheel is further provided with a plurality of first avoidance holes or at least one first strip-shaped hole, and the first avoidance holes or the first strip-shaped holes and the first butting portion are arranged in an enclosing manner to form a circular ring; the driven wheel is further provided with a plurality of second avoiding holes or at least one second strip-shaped hole, and the second avoiding holes or the second strip-shaped holes and the first abutting portion are arranged in an enclosing mode to form a circular ring.
In one embodiment, 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 a fourth through hole corresponding to the third through hole.
On the other hand, the application provides a switching mechanism, which includes the position selecting unit in the above embodiment, the first transmission assembly further includes a connecting shaft fixedly connected with the driving wheel, the connecting shaft is provided with a first through hole for the first transmission shaft to pass through, and an inner clamping portion arranged in the first through hole, and the inner clamping portion is used for being detachably sleeved with the first transmission shaft for transmission matching; the switching mechanism further includes:
the mounting unit comprises a first mounting piece and a second mounting piece, and the first mounting piece and the second mounting piece are arranged at intervals to form a moving space for the position selecting unit to move up and down;
the first transmission unit is used for driving the mounting seat to move up and down; and
the second transmission unit comprises a first transmission shaft and a second transmission shaft, the first transmission shaft is rotatably arranged in the first through hole and the second through hole in a penetrating manner, the first transmission shaft is provided with an outer clamping part which is detachably sleeved and matched with the inner clamping part in a transmission manner, the second transmission shaft and the driven wheel correspond to each other one by one, and the second transmission shaft is rotatably arranged in the third through hole and the fourth through hole in a penetrating manner;
when the mounting base moves downwards to enable the inner clamping portion to be in sleeved connection with the outer clamping portion in a transmission matching mode, the first transmission shaft can drive the driving wheel to rotate; when the mounting seat moves upwards to enable the inner clamping part and the outer clamping part to be staggered, the first transmission shaft cannot drive the driving wheel to rotate.
When the switching mechanism is applied to a transmission device, the first transmission shaft and the first gear are integrally formed or connected through other existing connecting means, so that the first transmission shaft can drive the first gear to rotate; in a similar way, the second transmission shaft and the second gear are integrally formed or connected through other existing connecting means, so that the second transmission shaft can drive the second gear to rotate, the output gears belonging to one group are arranged at intervals along the peripheral side of the first gear, and the output gears belonging to one group are arranged at intervals along the peripheral side of the second gear. When the output gear is in an initial state, the output gear is staggered with the first gear and the second gear; when the output gear is in a working state, namely the mounting seat moves upwards, so that the inner clamping part and the outer clamping part are staggered, the shaft body abuts against the first abutting part or the second abutting part, and the output gear is meshed with the corresponding first gear or the second gear. Therefore, when the electrical downtilt 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, if the inner clamping part and the outer clamping part are not sleeved and clamped, the mounting seat is driven to move by the first transmission unit, so that the inner clamping part and the outer clamping part are sleeved and matched, the driving wheel can be driven to rotate by the first transmission shaft, and the first abutting part or the second abutting part is arranged below the output gear corresponding to the phase shifter; then utilize first drive unit to drive the mount pad and shift up again for when interior card portion staggers with outer card portion, the axis body offsets with first butt portion or second butt portion, makes output gear and corresponding first gear or second gear mesh mutually, then correspond rotatory first transmission shaft or second transmission shaft and can realize the rotatory output power that corresponds output gear, provide power for the medium plate removal of this looks shifter, combine other transmission structure to realize the removal of medium plate, accomplish the regulation at declination angle. The switching mechanism adopts the position selecting unit to drive the output gears in at least two groups of output gear sets to rotate, and a control circuit is simplified.
The technical solution is further explained below:
in one embodiment, the first transmission unit comprises a screw rotatably disposed on the first mounting member, and a driver for driving the screw to rotate, and the mounting seat is provided with an internal threaded hole matched with the screw.
In one embodiment, a first limiting structure is arranged between one end of the screw rod and the mounting seat, a second limiting structure is arranged between the other end of the screw rod and the first mounting part, and the first limiting structure and the second limiting structure are matched for limiting the moving range of the mounting seat.
In one embodiment, the first transmission shaft comprises a first shaft body and a second shaft body which is detachably sleeved and matched with the first shaft body in a transmission manner, the first shaft body is provided with the external clamping part, and the second shaft body can be elastically reset;
when the mounting base moves downwards, the inner clamping part is in sleeved transmission fit with the outer clamping part, and the first shaft body is separated from the second shaft body; when the mounting seat moves upwards, the inner clamping part and the outer clamping part are staggered, and the first shaft body and the second shaft body are in sleeve joint transmission fit.
In one embodiment, the second transmission unit further includes a second transmission assembly, and the second transmission assembly is configured to drive the first transmission shaft and the second transmission shaft to rotate synchronously.
On the other hand, the present application further provides a transmission device, including the switching mechanism in any of the above embodiments, further including a first gear in transmission fit with the first transmission shaft, at least one second gear in transmission fit with the second transmission shaft, and at least two sets of output gear sets, where each set of output gear set at least includes an output gear capable of being elastically reset, the output gear may be engaged with the corresponding first gear or the corresponding second gear, and the output gear is provided with a shaft body abutting against the first abutting portion or the second abutting portion; when the output gear is in an initial state, the output gear is staggered with the first gear and the second gear; when the mounting seat moves upwards to enable the inner clamping portion and the outer clamping portion to be staggered, the shaft body abuts against the first abutting portion or the second abutting portion, and the output gear is meshed 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 through other existing connecting means, so that the first transmission shaft can drive the first gear to rotate; in a similar way, the second transmission shaft and the second gear are integrally formed or connected through other existing connecting means, so that the second transmission shaft can drive the second gear to rotate, the output gears belonging to one group are arranged at intervals along the peripheral side of the first gear, and the output gears belonging to one group are arranged at intervals along the peripheral side of the second gear. When the output gear is in an initial state, the output gear is staggered with the first gear and the second gear; when the output gear is in a working state, namely the mounting seat moves upwards, so that the inner clamping part and the outer clamping part are staggered, the shaft body abuts against the first abutting part or the second abutting part, and the output gear is meshed with the corresponding first gear or the second gear. Therefore, when the electrical downtilt 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, if the inner clamping part and the outer clamping part are not sleeved and clamped, the mounting seat is driven to move by the first transmission unit, so that the inner clamping part and the outer clamping part are sleeved and matched, the driving wheel can be driven to rotate by the first transmission shaft, and the first abutting part or the second abutting part is arranged below the output gear corresponding to the phase shifter; then utilize first drive unit to drive the mount pad and shift up again for when interior card portion staggers with outer card portion, the axis body offsets with first butt portion or second butt portion, makes output gear and corresponding first gear or second gear mesh mutually, then correspond rotatory first transmission shaft or second transmission shaft and can realize the rotatory output power that corresponds output gear, provide power for the medium plate removal of this looks shifter, combine other transmission structure to realize the removal of medium plate, accomplish the regulation at declination angle. The transmission device adopts the switching mechanism to provide power for adjusting the downward inclination angles of the at least two antennas, and simplifies a transmission system.
In still another aspect, the present application further provides a base station antenna including the transmission device in the above embodiment.
The base station antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of antenna frequency bands, is favorable for improving the reliability of the working performance of the multi-frequency antenna, and is favorable for the miniaturization development of the antenna.
Drawings
FIG. 1 is a schematic diagram of a transmission in one embodiment;
FIG. 2 is a schematic illustration of the transmission shown in FIG. 1 with parts hidden;
FIG. 3 is a schematic half-section view of the transmission shown in FIG. 1;
FIG. 4 is a schematic view of the positioning unit shown in FIG. 1 in cooperation 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 of the matching between the position selecting unit and other transmission structures in another embodiment.
Description of reference numerals:
100. a bit selection unit; 110. a mounting seat; 111. a mounting cavity; 112. a communicating hole; 113. a second through hole; 114. a third through hole; 115. an internally threaded bore; 120. a first transmission assembly; 122. a driving wheel; 122a, a first butting part; 122b, a first avoidance hole; 124. a driven wheel; 124a and a second butting part; 124b, a second avoidance hole; 124c, a fourth via hole; 126. a connecting shaft; 126a, a first through hole; 126b, an inner clamping part; 200. a mounting unit; 210. a first mounting member; 220. a second mount; 300. a first transmission unit; 310. a screw; 400. a second transmission unit; 410. a first drive shaft; 412. a first shaft body; 414. a second shaft body; 402. an outer clip portion; 420. a second drive shaft; 430. a second transmission assembly; 500. a first gear; 600. a second gear; 700. an output gear set; 710. an output gear; 712. a shaft body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the 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.
References to "first" and "second" in this disclosure are not intended to be specific in number or order, but merely in order to distinguish between the names.
The adjustment of the down tilt angle of the base station 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 3, the present application provides a transmission device, which can realize power output of two or three 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 antenna is applied to a multi-frequency antenna, can simplify a transmission system and is beneficial to the miniaturization development of the antenna.
The components of the transmission will be described one by one.
As shown in fig. 3 to 6, in an embodiment, a position selecting unit 100 is provided, which includes a mounting base 110 and a first transmission assembly 120, where the first transmission assembly 120 includes a driving wheel 122 rotatably disposed on the mounting base 110 and at least one driven wheel 124 rotatably disposed on the mounting base 110, the driving wheel 122 can drive all the driven wheels 124 to rotate, a first abutting portion 122a is disposed on a side surface of the driving wheel 122, and a second abutting portion 124a is disposed on a side surface of the driven wheel 124.
When the position selecting unit 100 is used, at least two abutting parts are formed by the cooperation of the driving wheel 122 and the driven wheel 124, and further more shaft bodies 712 (shafts of the gear shafts or transmission shafts of the output gears) of the output gears 710 can be abutted, so that more power can be provided for the output gears 710 in an effective space. For example, the first abutting portion 122a may correspond to the shaft body 712 of the 8 output gears 710, and the second abutting portion 124a may correspond to the shaft body 712 of the 8 output gears 710, and the driving wheel 122 and the driven wheel 124 are rotationally matched to realize abutting of any output gear 710 of the 16 output gears 710, that is, when the first abutting portion 122a or the second abutting portion 124a abuts against the shaft body of the output gear 710, the output gear 710 may be pushed into engagement with the transmission gear to realize power output. In a similar way, under the condition of the same size, more output gears 710 can be abutted, the frequency band is increased favorably, and the overlarge volume of the transmission structure or the more complex transmission structure cannot be caused.
It should be noted that the first transmission assembly 120 may be a gear assembly, and 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 drive the driven gear to rotate through other transmission gears; or the first transmission assembly 120 is a flexible transmission assembly, such as a belt transmission mechanism, a chain transmission mechanism, etc., and the driving wheel 122 is a pulley or a sprocket, etc. That is, the first transmission assembly 120 may be designed and modified for any existing wheel type transmission mechanism that can meet the requirements, and the technical solution having the corresponding features of the first transmission assembly 120 of the present application shall belong to the same or equivalent technical solution as the present application.
It should be noted that the term "detachable sleeve transmission fit" belongs to one of detachable transmission connection modes, and it uses the sleeve connection mode to realize butt joint, and uses the non-circular hole to realize transmission fit with the corresponding cylinder, but through moving up and down, can make the non-circular hole separate from the corresponding cylinder. Such as polygonal bodies, toothed shaped holes and toothed bodies, etc., corresponding to the polygonal holes.
The first abutting portion 122a and the second abutting portion 124a are used for abutting against the shaft body of the output gear 710, so that the output gear 710 can be meshed with the transmission gear (the first gear 500 or the second gear 600)
On the basis of the above embodiments, as shown in fig. 2 to 3, in one embodiment, the mounting base 110 is provided with a mounting cavity 111 and a communication hole 112 penetrating through a side wall of the mounting cavity 111, the first transmission assembly 120 is embedded in the mounting cavity 111, and the communication hole 112 is used for allowing the shaft body 712 of the output gear 710 to pass through. As such, the provision of the mounting cavity 111 facilitates reliable mounting of the first drive assembly 120 and facilitates lubrication of the first drive assembly 120.
In addition to any of the above embodiments, in an embodiment, when the first abutting portion 122a abuts against a shaft of one output gear 710, the second abutting portion 124a does not abut against the shaft of the output gear 710; when the second abutting portion 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. Thus, 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 providing more power output by using the position selecting unit 100.
It should be noted that the "first abutting portion 122 a" and the "second abutting portion 124 a" may be a protrusion structure with a convex surface, or an abutting structure formed by a groove or a hole and a wheel body, and so on.
On the basis of any of the above embodiments, as shown in fig. 6, in an embodiment, the driving wheel 122 is further provided with a plurality of first avoiding holes 122b or at least one first bar-shaped hole (not shown), and the first avoiding holes 122b or the first bar-shaped hole and the first abutting portion 122a are enclosed to form a ring; the driven wheel 124 is further provided with a plurality of second avoiding holes 124b or at least one second strip-shaped hole (not shown), and the second avoiding holes 124b or the second strip-shaped hole and the first abutting portion 122a are enclosed to form a circular ring. Therefore, the avoiding holes and the bar-shaped holes form corresponding abutting parts, so that when one of the output gears 710 abuts against the abutting part, other output gears 710 are inserted into the avoiding holes or the bar-shaped holes and cannot be jacked up. The specific positions of the first or second avoiding hole 122b or 124b and the first or second bar-shaped hole may be designed according to the arrangement position of the output gear 710, as long as the above requirements are satisfied.
The first strip-shaped hole and the second strip-shaped hole are arc-shaped. In addition to any of the above embodiments, as shown in fig. 5, in an embodiment, the mounting base 110 further has a second through hole 113 and a third through hole 114, the second through hole 113 corresponds to the first through hole 126a, and the driven gear has a fourth through hole 124c corresponding to the third through hole 114. Therefore, the first transmission shaft 410 and the second transmission shaft 420 can be inserted conveniently, and the driving wheel 122 can be driven to rotate by the first transmission shaft 410.
The through holes may be formed directly or may be formed at intervals, that is, by using a bearing housing.
On the basis of the above embodiments of the bit selecting unit 100, as shown in fig. 1 to 4, in one embodiment, a transmission device is provided, which includes a switching mechanism (not labeled), a first gear 500, at least one second gear 600, and at least two output gear sets 700. Wherein:
the first transmission assembly further comprises a connecting shaft 126 fixedly connected with 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 an inner clamping portion 126b arranged in the first through hole 126a, and the inner clamping portion 126b is detachably sleeved with the first transmission shaft 410 for transmission matching;
the switching mechanism includes the position selecting unit 100 in the above embodiment, and further includes a mounting unit 200, a first transmission unit 300, and a second transmission unit 400, the mounting unit 200 includes a first mounting part 210 and a second mounting part 220, and the first mounting part 210 and the second mounting part 220 are arranged at an interval to form a moving space for the position selecting unit 100 to move up and down; the first transmission unit 300 is used for driving the mounting base 110 to move up and down; the second transmission unit 400 includes a first transmission shaft 410 in transmission connection with the first gear 500 and a second transmission shaft 420 in transmission connection with the second gear 600, the first transmission shaft 410 is rotatably inserted into the first through hole 126a and the second through hole 113, the first transmission shaft 410 is provided with an outer clamping portion 402 detachably sleeved and in transmission connection with the inner clamping portion 126b, the second transmission shafts 420 are in one-to-one correspondence with the driven wheels 124, and the second transmission shafts 420 are rotatably inserted into the third through hole 114 and the fourth through hole 124 c.
Each set of output gear set 700 at least comprises an output gear 710 capable of being elastically reset, the output gear 710 can be meshed with the corresponding first gear 500 or second gear 600, and the output gear 710 is provided with a shaft body 712 in contact with the first abutting part 122a or the second abutting part 124 a; when the output gear 710 is in the initial state, the output gear 710 is misaligned with the first gear 500 and the second gear 600.
When the mounting base 110 moves downward to make the inner engaging portion 126b and the outer engaging portion 402 engage in a sleeve-connection transmission manner, the first transmission shaft 410 can drive the driving wheel 122 to rotate, and at this time, when the output gear 710 is in an initial state, the output gear 710 is staggered from the first gear 500 and the second gear 600.
When the mounting base 110 moves upward to make the inner locking portion 126b and the outer locking portion 402 staggered, the first transmission shaft 410 cannot drive the driving wheel 122 to rotate, and the shaft body 712 of the output gear abuts against the first abutting portion or the second abutting portion, so that the output gear 710 is engaged with the corresponding first gear 500 or the second gear 600.
When the transmission device is used, the first transmission shaft 410 and the first gear 500 are integrally molded or connected through other existing connecting means, so that the first transmission shaft 410 can drive the first gear 500 to rotate; similarly, the second transmission shaft 420 and the second gear 600 are integrally molded 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 arranged along the outer peripheral side of the first gear 500 at intervals, and the output gears 710 of the same group are all arranged along the outer peripheral side of the second gear 600 at intervals. When the output gear 710 is in the initial state, the output gear 710 is staggered from the first gear 500 and the second gear 600; when the output gear 710 is in an operating state, that is, when the mounting base 110 moves upward and the inner locking portion 126b is displaced from the outer locking portion 402, the shaft body 712 abuts against the first abutting portion or the second abutting portion, and the output gear 710 is engaged with the corresponding first gear 500 or the second gear 600. Thus, when the electrical downtilt of a certain phase shifter needs to be adjusted, the first transmission shaft 410 can be driven to rotate by the existing power source such as a motor or a rotary hydraulic cylinder, if the inner clamping portion 126b is not sleeved and clamped with the outer clamping portion 402, the first transmission unit 300 drives the mounting base 110 to move, so that the inner clamping portion 126b is sleeved and matched with the outer clamping portion 402, and at this time, the first transmission shaft 410 can be used to drive the driving wheel 122 to rotate, so that the first abutting portion 122a or the second abutting portion 124a is arranged below the output gear 710 corresponding to the phase shifter; then, the first transmission unit 300 is utilized to drive the mounting base 110 to move upwards, so that when the inner clamping portion 126b is staggered with the outer clamping portion 402, the shaft body 712 abuts against the first abutting portion or the second abutting portion, so that the output gear 710 is engaged with the corresponding first gear 500 or the second gear 600, and then the first transmission shaft 410 or the second transmission shaft 420 is correspondingly rotated to realize the rotary output power of the corresponding output gear 710, and the driving wheel 122 cannot be driven to rotate, so that power is provided for the movement of the dielectric plate of the phase shifter, the movement of the dielectric plate is realized by combining other transmission structures, and the adjustment of the downward inclination angle is completed. The transmission device can provide power for adjusting the downward inclination angles of at least two antennas, and a transmission system is simplified.
It should be noted that the connecting shaft 126 and the driving wheel 122 may be integrally formed, or may be separately manufactured and assembled together.
In one embodiment, the output gears 710 of the output gear sets 700 are evenly spaced along the outer peripheral side of the first gear 500, and the output gears 710 of the output gear sets 700 are evenly spaced along the outer peripheral side of the second gear 600.
In one embodiment, a guiding structure (not labeled) is disposed between the output gear 710 and the first gear 500 or the second gear 600, so as to facilitate guiding in during the engagement.
The first transmission unit 300 can be implemented in various ways, such as directly selecting a reciprocating telescopic power output device, such as an air cylinder, a linear motor, a hydraulic cylinder, etc.; the indirect reciprocating telescopic movement can also be realized by adopting a rotary power device (such as a servo motor) + a screw rod and nut transmission mechanism, or a rotary power device (such as a servo motor) + a gear rack transmission mechanism, or a rotary power device + a conveying belt mechanism (such as a belt mechanism or a chain mechanism and the like), as long as the use requirements can be met, and the limitation is not required here.
As shown in fig. 2, in the embodiment, the first transmission unit 300 includes a screw 310 rotatably disposed on the first mounting member 210, and a driver for driving the screw 310 to rotate, and the mounting base 110 is provided with an internally threaded hole 115 for cooperating with the screw 310. In this way, the driver (motor or rotary hydraulic cylinder) is used to directly or indirectly drive the screw rod 310 to rotate, so as to provide power for the up-and-down movement of the mounting base 110.
It can be understood that, since the first transmission shaft 410 and the second transmission shaft 420 are inserted into the mounting base 110, they play a guiding role, so that the mounting base 110 can only move up and down along the axial direction of the screw 310.
Further, in an embodiment, a first limiting structure (not labeled) is disposed between one end of the screw 310 and the mounting base 110, and a second limiting structure (not labeled) is disposed between the other end of the screw 310 and the first mounting element 210, and the first limiting structure and the second limiting structure cooperate to limit a moving range of the mounting base 110. The specific implementation manner of the first limiting structure and the second limiting structure can be implemented in the prior art, and is not described in detail herein.
On the basis of any one of the above embodiments of the transmission device, as shown in fig. 3, in an embodiment, the first transmission shaft 410 includes a first shaft body 412 and a second shaft body 414 detachably sleeved and transmission-fitted with the first shaft body 412, the first shaft body 412 is provided with an external clamping portion 402, and the second shaft body 414 is in transmission connection with the first gear 500;
when the mounting base 110 moves downward, the inner locking portion 126b is in sleeve transmission fit with the outer locking portion 402, and the first shaft 412 is separated from the second shaft 414; when the mounting base 110 moves upward, the inner locking portion 126b is offset from the outer locking portion 402, and the first shaft 412 and the second shaft 414 are engaged in a driving manner. Thus, the detachable sleeve-joint fit of the first shaft body 412 and the second shaft body 414 is utilized, so that when the mounting base 110 moves down, the inner clamping portion 126b is in sleeve-joint transmission fit with the outer clamping portion 402, the first shaft body 412 is separated from the second shaft body 414, and at this time, the rotating first shaft body 412 can drive the driving wheel 122 to rotate, but cannot drive the first gear 500 to rotate, which is beneficial to improving the reliability of transmission.
Similarly, the second transmission shaft 420 can also adopt a split structure to realize the transmission matching and separation of the second gear 600.
On the basis of any one of the above embodiments of the transmission device, as shown in fig. 2 and fig. 3, in an embodiment, the second transmission unit 400 further includes a second transmission assembly 430, and the second transmission assembly 430 is used for driving the first transmission shaft 410 and the second transmission shaft 420 to synchronously rotate. Thus, only one power device is needed to drive the first transmission shaft 410 and the second transmission shaft 420 to rotate synchronously by using the second transmission assembly 430.
The second transmission assembly 430 includes, but is not limited to, a gear assembly (as shown in fig. 2), a pulley assembly, a chain assembly, etc.
In one embodiment, there is also provided a base station antenna including the actuator in any of the above embodiments.
The base station antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of antenna frequency bands, is favorable for improving the reliability of the working performance of the multi-frequency antenna, and is favorable for the miniaturization development of the 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 the frequency range of the antenna and only needs to expand the driving gear and the output shaft, the volume of the transmission structure is not too large or the transmission structure is not more complex, the overall rotating efficiency is basically unchanged, and the reliability of the working performance of the multi-frequency antenna is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911416008.5A CN111129774B (en) | 2019-12-31 | 2019-12-31 | Base station antenna, transmission device, switching mechanism and position selection unit |
| PCT/CN2020/116093 WO2021135402A1 (en) | 2019-12-31 | 2020-09-18 | Base station antenna, transmission device, switching mechanism and position selecting unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911416008.5A CN111129774B (en) | 2019-12-31 | 2019-12-31 | Base station antenna, transmission device, switching mechanism and position selection unit |
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| CN111129774A true CN111129774A (en) | 2020-05-08 |
| CN111129774B CN111129774B (en) | 2024-11-22 |
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| CN201911416008.5A Active CN111129774B (en) | 2019-12-31 | 2019-12-31 | Base station antenna, transmission device, switching mechanism and position selection unit |
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| WO (1) | WO2021135402A1 (en) |
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| CN111129770A (en) * | 2019-12-31 | 2020-05-08 | 京信通信技术(广州)有限公司 | Antenna, transmission device and transmission mechanism |
| CN111370872A (en) * | 2020-05-28 | 2020-07-03 | 南京擅水科技有限公司 | Antenna inclination angle adjusting device |
| WO2021135402A1 (en) * | 2019-12-31 | 2021-07-08 | 京信通信技术(广州)有限公司 | Base station antenna, transmission device, switching mechanism and position selecting unit |
| WO2022141501A1 (en) * | 2020-12-29 | 2022-07-07 | 京信通信技术(广州)有限公司 | Multiband antenna, phase shifting device, and transmission mechanism |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111129774B (en) | 2024-11-22 |
| WO2021135402A1 (en) | 2021-07-08 |
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