CN111146594A - Antenna, transmission device and switching mechanism - Google Patents
Antenna, transmission device and switching mechanism Download PDFInfo
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- CN111146594A CN111146594A CN201911424268.7A CN201911424268A CN111146594A CN 111146594 A CN111146594 A CN 111146594A CN 201911424268 A CN201911424268 A CN 201911424268A CN 111146594 A CN111146594 A CN 111146594A
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- gear
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- switching mechanism
- linkage
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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
Abstract
The invention discloses an antenna, a transmission device and a switching mechanism, wherein the switching mechanism comprises a screw rod, a first gear and a guide piece, wherein the screw rod is rotatably arranged, and the first gear is provided with an internal threaded hole in spiral transmission fit with the screw rod; the guide piece and the screw are arranged at intervals, and a linkage assembly is arranged between the guide piece and the first gear; when the guide piece is fixed relative to the screw rod, the first gear is in guide fit with the guide piece through the linkage assembly; when the guide piece rotates for the screw rod, the guide piece can drive first gear through the linkage subassembly and rotate for first gear and screw rod can be synchronous and syntropy rotate. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the multi-frequency antenna. The antenna adopts the transmission device, and has better reliability compared with the prior art.
Description
Technical Field
The invention relates to the technical field of communication, in particular to an 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, the motors used to drive the phase shifters in the conventional transmission device still correspond to the transmission mechanisms of the phase shifters one-to-one, the number of the motors is not reduced, and the number of the driving circuits in the control module is not reduced as the number of the motors. If the frequency bands of the antenna are increased, the structure of the transmission system is more complex and heavy, which affects the reliability of the multi-frequency antenna.
Disclosure of Invention
Accordingly, there is a need for an antenna, an actuator and a switching mechanism. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output. The transmission device adopts the switching mechanism, which is beneficial to simplifying the transmission structure and improving the reliability of the multi-frequency antenna. The antenna adopts the transmission device, and has better reliability compared with the prior art.
The technical scheme is as follows:
in one aspect, the present application provides a switching mechanism comprising: the screw rod can be arranged in a rotating mode, and the first gear is provided with an internal thread hole matched with the screw rod in a spiral transmission mode; the guide piece and the screw are arranged at intervals, and a linkage assembly is arranged between the guide piece and the first gear; when the guide piece is fixed relative to the screw rod, the first gear is in guiding fit with the guide piece through the linkage assembly; when the guide piece rotates relative to the screw rod, the guide piece can drive the first gear to rotate through the linkage assembly, so that the first gear and the screw rod can synchronously rotate in the same direction.
When the switching mechanism is used, corresponding parts are installed on a preset position or an installation unit of equipment, and power output or transmission is carried out by utilizing the first gear. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at the moment, the guide piece is fixed relative to the screw rod, the first gear is in guide fit with the guide piece through the linkage assembly, the guide piece is used as a guide limiting structure of the first gear, the screw rod is made to rotate, and then the first gear can be driven to move along the axis direction of the screw rod, so that the first gear is meshed with the input gear of the phase shifter. And then the guide piece rotates relative to the screw rod, the guide piece can drive the first gear to rotate through the linkage assembly, then the guide piece and the screw rod are rotated simultaneously, the guide piece can drive the first gear to rotate, so that the first gear and the screw rod synchronously rotate in the same direction, the first gear cannot slide relative to the axis of the screw rod, and synchronously rotate along with the screw rod in the same direction, and the first gear drives the input gear to rotate, so that power is provided for the movement of the medium plate. The switching mechanism can reduce the number of power equipment, and convert two powers into at least two powers to be output.
The technical solution is further explained below:
in one embodiment, the linkage assembly includes a second gear capable of driving the first gear to rotate, and a first linkage member, the second gear is movable along a length direction of the guide member, the guide member is capable of driving the second gear to rotate, and the first linkage member is capable of driving the second gear and the first gear to move along the length direction of the guide member.
In one embodiment, the first linkage member is rotatably connected to the second gear and the first gear, respectively.
In one embodiment, the linkage assembly further includes a second linkage member, the first linkage member and the second linkage member cooperate to form a mounting cavity, the second gear and the first gear are respectively rotatably disposed in the mounting cavity, and the mounting cavity is provided with an opening for the first gear to mesh with.
In one embodiment, the second gear is in driving connection with the guide.
In one embodiment, the switching mechanism further comprises a mounting unit, and the screw is rotatably arranged on the mounting unit.
In one embodiment, one end of the screw rod is provided with a first transmission end, one end of the guide piece is provided with a second transmission end staggered with the first transmission end, and the first transmission end and the second transmission end are arranged on the outer side of the mounting unit.
In one embodiment, the switching mechanism further comprises a linkage gear, the linkage gear is movable relative to the mounting unit, the first transmission end is a first transmission gear, and the second transmission end is a second transmission gear; when the linkage gear is at a first position, the first transmission gear can rotate, and the second transmission gear cannot rotate; when the linkage gear is located at the second position, the linkage gear is meshed with the first transmission gear and the second transmission gear respectively.
In one embodiment, the first transmission end is disposed at one end of the screw, and the second transmission end is disposed near the other end of the screw.
On the other hand, the application also provides a transmission device, which comprises the switching mechanism in any one of the embodiments and the switching mechanism, wherein the switching mechanism comprises at least two transmission shafts arranged along the length direction of the screw rod and gear units in one-to-one correspondence with the transmission shafts, the transmission shafts are rotatably arranged on the mounting unit, and one ends of the transmission shafts are provided with driven bevel gears; the gear unit comprises a driving bevel gear and a driven gear used for driving the driving bevel gear to rotate, the driving bevel gear and the driven gear can be rotatably arranged on the mounting unit, the driving bevel gear can drive the corresponding driven bevel gear to rotate, and the first gear can selectively drive the driven gear to rotate.
When the transmission device is used, corresponding parts are installed on the installation unit, at least two transmission shafts are arranged along the length direction of the screw, and the first gear moves along the axis of the screw and can be meshed with the corresponding driven gear according to the adjustment requirement. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at the moment, the guide piece is fixed relative to the installation unit, the first gear is in guide fit with the guide piece through the linkage assembly, the guide piece is used as a guide limiting structure of the first gear, the screw rod is made to rotate, and then the first gear can be driven to move along the axis direction of the screw rod, so that the first gear is meshed with the driven gear. And then the guide piece rotates relative to the mounting unit, the guide piece can drive the first gear to rotate through the linkage assembly, then the guide piece and the screw rod are rotated simultaneously, the guide piece can drive the first gear to rotate, so that the first gear and the screw rod rotate synchronously and in the same direction, the first gear cannot slide relative to the axis of the screw rod, rotates synchronously and in the same direction along with the screw rod, drives the driven gear to rotate, drives the driven bevel gear to rotate through the driving bevel gear, further drives the transmission shaft to rotate, and utilizes the transmission shaft to provide power for the movement of the medium plate. The transmission device adopts the switching mechanism to facilitate the simplification of a transmission structure, so that the transmission mechanism of the phase shifter can be arranged at intervals along the axis direction of the screw rod, and the reliability of the antenna is improved.
In another aspect, the present application further provides an antenna including the transmission device in any of the above embodiments.
The antenna adopts the transmission device, and has better reliability compared with the prior art.
Drawings
FIG. 1 is a schematic diagram of a transmission in one embodiment;
FIG. 2 is a schematic view of the transmission shown in FIG. 1 from another perspective;
fig. 3 is a schematic structural view of the switching mechanism shown in fig. 1 (with the mounting unit hidden);
FIG. 4 is a schematic view of the linkage assembly of FIG. 3 assembled with the first gear;
FIG. 5 is an exploded view of the linkage assembly and the first gear of FIG. 4;
FIG. 6 is a schematic view of the output gear shown in FIG. 5;
FIG. 7 is a schematic structural view of the shift mechanism of FIG. 1;
FIG. 8 is an enlarged partial view of A shown in FIG. 7;
description of reference numerals:
100. a switching mechanism; 110. a mounting unit; 120. a screw; 122. a first transmission end; 124. a first limiting part; 126. a second limiting part; 130. a first gear; 132. an internally threaded bore; 134. a third limiting part; 136. a fourth limiting part; 140. a guide member; 142. a second transmission end; 150. a linkage assembly; 152. a second gear; 154. a first linkage member; 156. a second linkage member; 102. an opening; 200. a switching mechanism; 210. a drive shaft; 220. a driven bevel gear; 230. a gear unit; 232. a drive bevel gear; 234. a driven gear; 202. a first introduction part.
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 do not denote any particular order or quantity, but rather are used to distinguish one element from another.
The adjustment of the down tilt angle of the antenna is often performed by means of a phase shifter, and the position of the dielectric plate in the phase shifter is adjusted in the actual adjustment process, that is, the down tilt angle is adjusted by moving the dielectric plate. At this time, some transmission mechanisms are needed to realize the movement of the medium plate; meanwhile, the power of the existing power equipment such as the motor, the linear motor, the pneumatic cylinder and the like can be output at different positions through the transmission device.
As shown in fig. 1 and fig. 2, the present application provides a transmission device, which can realize power output of two power sources at different positions, and can continuously increase output ends as required, and is applied to a multi-frequency antenna, so as to simplify a transmission system and facilitate the miniaturization development of the antenna.
The transmission of the present application is described below.
As shown in fig. 1 and 2, in one embodiment, an actuator is provided, which includes a switching mechanism 100 and a switching mechanism 200. The switching mechanism 100 can convert two powers into a plurality of powers to be output, and the switching mechanism 200 can convert the powers into powers which can be conveniently supplied to the respective phase shifters and supply the powers to the transmission mechanisms of the phase shifters.
Referring to fig. 3 to 6 together, the switching mechanism 100 includes: the mounting unit 110, the screw 120, the first gear 130 and the guide 140, the screw 120 is rotatably disposed on the mounting unit 110, the first gear 130 is provided with an internal threaded hole 132 in screw driving fit with the screw 120; the guide 140 is spaced apart from the screw 120, and when the guide 140 is fixed with respect to the mounting unit 110, the guide 140 is slidably engaged with the first gear 130; when the guide 140 rotates relative to the mounting unit 110, the guide 140 can drive the first gear 130 to rotate, so that the first gear 130 and the screw 120 can rotate synchronously and in the same direction.
Referring to fig. 7 and 8 together, the conversion mechanism 200 includes at least two transmission shafts 210 disposed along a length direction of the screw 120, and gear units 230 corresponding to the transmission shafts 210 one to one, the transmission shafts 210 are rotatably installed at the installation unit 110, and one end of the transmission shafts 210 is provided with a driven bevel gear 220; the gear unit 230 includes a drive bevel gear 232 and a driven gear 234 for driving the drive bevel gear 232 to rotate, both the drive bevel gear 232 and the driven gear 234 are rotatably mounted on the mounting unit 110, the drive bevel gear 232 can drive the corresponding driven bevel gear 220 to rotate, and the first gear 130 can selectively drive the driven gear 234 to rotate.
When the transmission device is used, corresponding parts are installed on the installation unit 110, at least two transmission shafts 210 are arranged along the length direction of the screw rod 120, and the first gear 130 moves along the axis of the screw rod 120 and can be meshed with the corresponding driven gear 234 according to the adjustment requirement. Specifically, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for the movement of the dielectric plate; at this time, the guide 140 is fixed relative to the mounting unit 110, the first gear 130 is in guiding fit with the guide 140 through the linkage assembly 150, and the guide 140 is used as a guiding and limiting structure of the first gear 130, so that the screw 120 is rotated, and the first gear 130 can be driven to move along the axial direction of the screw 120 (i.e., the screw drives the screw to move along the length direction of the screw), so that the first gear 130 is engaged with the driven gear 234. Then, the guide member 140 rotates relative to the mounting unit 110, the guide member 140 can drive the first gear 130 to rotate through the linkage assembly 150, and then the guide member 140 and the screw rod 120 are rotated simultaneously, the guide member 140 can drive the first gear 130 to rotate, so that the first gear 130 and the screw rod 120 synchronously and equidirectionally rotate (i.e. the screw rod and the nut synchronously and equidirectionally rotate), the first gear 130 cannot slide relative to the axis of the screw rod 120, and synchronously and equidirectionally rotate along with the screw rod 120, and drive the driven gear 234 to rotate, and drive the driven bevel gear 220 to rotate through the driving bevel gear 232, and further drive the transmission shaft 210 to rotate, and the transmission shaft 210 is used for providing power for the movement of the medium plate. The transmission device adopts the switching mechanism 100, which is beneficial to simplifying the transmission structure, so that the transmission mechanism of the phase shifter can be arranged at intervals along the axial direction of the screw rod 120, and the reliability of the antenna can be improved.
The "mounting unit 110" may be any mounting structure capable of mounting the above-described components, such as a mounting bracket, a mounting seat, and a mounting case.
In addition, in the present embodiment, relevant parts of the switching mechanism 100 are integrated into the mounting unit 110, which facilitates modular assembly. In other embodiments, the relevant parts of the switching mechanism 100 can be installed at the preset position of the device to achieve the above-mentioned functions.
It should be noted that the aforementioned matching relationship between the drive bevel gear 232 and the driven bevel gear 220 and between the drive bevel gear 232 and the driven gear 234 includes, but is not limited to, direct engagement transmission, and may also be indirect engagement transmission, that is, power transmission is performed by using other gears.
In addition, the two states of "the guide 140 is fixed with respect to the mounting unit 110" and "the guide 140 rotates with respect to the mounting unit 110" are switched, and specific implementation includes, but is not limited to, that the guide 140 is rotatably connected with the mounting unit 110, and the guide 140 is fixed or rotated by using a locking structure (the locking structure includes mechanical locking and also includes electrical locking); or the guide 140 may be rotatably coupled to the mounting unit 110, and the guide 140 may be fixed or rotated by a power device.
Alternatively, the rotation center line of the screw 120 and the rotation center line of the first gear 130 are on the same straight line, so that the transmission precision between the two is higher.
In one embodiment, the switching mechanism 100 further includes a locking structure (not shown) for locking the guide 140 or releasing the guide 140. As such, the guide 140 is locked using the locking structure such that the guide 140 is fixed with respect to the mounting unit 110; and when the guide 140 is released, the guide 140 is rotated with respect to the mounting unit 110.
The locking structure includes, but is not limited to, any one of the existing mechanical locking structures or electrical locking structures capable of locking a rotating shaft or a rotating member.
On the basis of any of the above embodiments, as shown in fig. 7, in an embodiment, the first introduction portions 202 are disposed on both sides of the gear teeth of the driven gear 234, and two adjacent first introduction portions 202 cooperate to form a first introduction groove. In this way, the first introduction part 202 forms the first introduction groove, so that the gear teeth of the driven gear 234 can be conveniently introduced into the gear teeth of the first gear 130, the meshing between the two is smoother, the switching is smoother, and the phenomenon of locking can be avoided.
Similarly, in an embodiment, two sides of the gear teeth of the first gear 130 are provided with second guiding portions (not labeled), and two adjacent second guiding portions cooperate to form a second guiding groove (not labeled). The gear teeth of the driven gear 234 can be guided into the gear teeth of the driving gear, so that the two gears can be meshed more smoothly, the switching is smoother, and the phenomenon of jamming can be avoided.
The first lead-in portion 202 or the second lead-in portion may have a rounded or reverse tapered structure.
On the basis of any of the above embodiments, as shown in fig. 3 to 5, in an embodiment, the linkage assembly 150 includes a second gear 152 and a first linkage 154, the second gear 152 can drive the first gear 130 to rotate, the guide 140 can drive the second gear 152 to rotate, and the first linkage 154 can drive the second gear 152 and the first gear 130 to move along the length direction of the guide 140. Thus, when the guide member 140 is fixed relative to the mounting unit 110, the second gear 152 is not driven by the guide member 140 to rotate, but only moves along the length direction of the guide member 140, at this time, the first gear 130 can slide along the length direction of the screw 120 (i.e., the screw drives the nut to move along the length direction of the screw) by using the limit guiding function of the second gear 152 and the first linking member 154, and at this time, the screw 120 is rotated, so that the second gear 152 and the first gear 130 move along the length direction of the screw 120; when the guide member 140 rotates relative to the mounting unit 110, the guide member 140 can drive the second gear 152 to rotate, and further the second gear 152 can drive the first gear 130 to rotate, and the guide member 140 and the screw rod 120 are synchronously rotated, so that the first gear 130 and the screw rod 120 can synchronously and equidirectionally rotate (i.e. the screw rod and the nut synchronously and equidirectionally rotate).
It should be noted that the aforementioned matching relationship between the second gear 152 and the first gear 130 includes, but is not limited to, direct meshing transmission, and may also be indirect meshing transmission, that is, power transmission is performed by using other gears.
Further, in one embodiment, the second gear 152 is in transmission connection with the guide member 140. As such, the guide 140 includes a non-cylindrical structure such as a tooth structure, a polygonal structure, and the like, and the second gear 152 is provided with a non-circular hole such as a tooth hole, a polygonal hole, and the like adapted to the guide 140.
Further, in an embodiment, the first linking member 154 is rotatably connected to the second gear 152 and the first gear 130, respectively. Thus, the first linking member 154 is used to connect the second gear 152 and the first gear 130, so that the first linking member 154 drives the second gear 152 and the first gear 130 to slide synchronously.
Based on any of the embodiments of the linkage assembly 150, as shown in fig. 3 to 5, in an embodiment, the linkage assembly 150 further includes a second linkage member 156, the first linkage member 154 and the second linkage member 156 cooperate to form a mounting cavity, the second gear 152 and the first gear 130 are respectively rotatably disposed in the mounting cavity, and the mounting cavity is provided with an opening 102 for the first gear 130 to engage. Thus, the first linkage 154 and the second linkage 156 are respectively disposed at two sides of the first gear 130 and the second gear 152, that is, when the first gear 130 and the second gear 152 move along the first direction of the guide 140, the first linkage 154 can be used for linkage; when the first gear 130 and the second gear 152 move in the direction opposite to the first direction of the guide 140, they are interlocked by the second interlocking member 156. Meanwhile, the first linkage member 154 and the second linkage member 156 cooperate to form a mounting cavity, which is beneficial to lubrication and protection of the first gear 130 and the second gear 152.
In addition to any of the above embodiments, as shown in fig. 2 and fig. 6, in an embodiment, the screw 120 is provided with a first limiting portion 124 and a second limiting portion 126 which are arranged at intervals, and the first gear 130 is provided with a third limiting portion 134 which is in rotation-stopping fit with the first limiting portion 124 and a fourth limiting portion 136 which is in rotation-stopping fit with the second limiting portion 126. Thus, the first gear 130 can move within a predetermined range by the cooperation of the first position-limiting portion 124 and the third position-limiting portion 134 and the cooperation of the second position-limiting portion 126 and the fourth position-limiting portion 136, so as to prevent the first gear 130 from interfering with other parts.
Of course, in other embodiments, the above-mentioned limiting structure may be provided on the guide 140 and the linkage assembly 150, and the first gear 130 may be moved within a predetermined range.
In addition to any of the above embodiments, as shown in fig. 2 and 3, in one embodiment, the screw rod 120 is provided with a first transmission end 122, the guide member 140 is provided with a second transmission end 142 staggered from the first transmission end 122, and the first transmission end 122 and the second transmission end 142 are disposed outside the mounting unit 110. Thus, the screw rod 120 can be driven to rotate by driving the first transmission end 122 to rotate, and the screw rod 120 can be driven to rotate by driving the second transmission end 142 to rotate, so that the power equipment can be conveniently installed on the outer side of the installation unit 110.
The specific structures of the first transmission end 122 and the second transmission end 142 can be set according to actual needs, such as non-cylindrical structures such as a tooth-shaped structure and a polygonal structure.
Further, in one embodiment, the switching mechanism 100 further comprises a linkage gear (not shown) movable relative to the mounting unit 110, the first transmission end 122 is a first transmission gear, and the second transmission end 142 is a second transmission gear; when the linkage gear is at the first position, the first transmission gear can rotate, and the second transmission gear can not rotate; when the linkage gear is at the second position, the linkage gear is meshed with the first transmission gear and the second transmission gear respectively. Therefore, the linkage gear can be driven by the first power equipment to switch between the first position and the second position, the first transmission end 122 is directly or indirectly driven by the second power equipment, and the second transmission end 142 can be driven to perform synchronous transmission, so that a mechanical synchronous structure is formed.
Specifically, in one embodiment, when a dielectric plate of a certain phase shifter needs to be adjusted, power needs to be provided for movement of the dielectric plate; at this time, the linkage gear is in the first position, the guide 140 is fixed relative to the mounting unit 110, the guide 140 and the linkage assembly 150 are used as a guide structure of the first gear 130, the screw 120 is rotated, and the first gear 130 is driven to move along the axial direction of the screw 120, so that the first gear 130 is meshed with the input gear of the phase shifter. The linkage gear is moved to the second position by the first device, the guide member 140 rotates relative to the mounting unit 110, and then the guide member 140 and the screw rod 120 are simultaneously rotated, the guide member 140 drives the first gear 130 to rotate through the linkage assembly 150, so that the first gear 130 and the screw rod 120 synchronously and unidirectionally rotate, and power is provided for the movement of the dielectric plate.
This first power equipment can be for can providing the existing equipment of flexible power, like linear electric motor, pneumatic cylinder etc.. The second power device may be an existing device capable of providing rotational power, such as a servo motor, a rotary hydraulic cylinder, or the like.
In another embodiment, the first transmission end 122 is disposed at one end of the screw 120, and the second transmission end 142 is disposed near the other end of the screw 120. Thus, one power device, which may be a servo motor, is used to drive the rotation of the screw 120 and the other power device is used to drive the rotation of the guide 140.
Specifically, the first transmission end 122, the second transmission end 142 and the servo motor can directly transmit power by using a gear transmission mechanism (as shown in fig. 1 and 2), a chain transmission mechanism or a belt transmission mechanism.
In one embodiment, an antenna is provided, which includes the actuator of any of the above embodiments. The antenna adopts the transmission device, simplifies a transmission system, can adapt to the increase of the frequency range of the antenna, and is favorable for improving the reliability of the working performance of the multi-frequency antenna.
At present, for a super multi-band antenna, along with the increase of frequency bands, for example, after the frequency band is greater than 8 frequencies, the size of a traditional transmission device is greatly increased, for example, each frequency band in the transmission device is distributed in a circular ring shape, the frequency bands are more and the diameter is larger, and along with the increase of the frequency bands, the frequency selection time of the transmission device is also greatly increased, the response speed is slow, and the reliability of the working performance of the multi-band antenna is also influenced.
Compared with the prior art, the method has the following advantages and beneficial effects:
1. the adjustment of the electrical downtilt angles of at least two antennas can be controlled by only two power sources, and the antenna is applied to a multi-frequency antenna, so that the cost can be greatly reduced.
2. The transmission device can realize unit design and production, greatly improve the production efficiency and improve the reliability of a transmission system.
3. The structure of the transmission device is very compact, the transmission device can adapt to the increase of the frequency range of the antenna and only needs to expand the driving gear and the transmission shaft 210, the volume of the transmission structure is not too large or the transmission structure is not more complex, the overall rotation efficiency is basically unchanged, and the reliability of the working performance of the multi-frequency antenna is improved.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some 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 (11)
1. A switching mechanism, comprising: the screw rod is rotatably arranged;
the first gear is provided with an internal threaded hole in screw transmission fit with the screw; and
the guide piece and the screw are arranged at intervals, and a linkage assembly is arranged between the guide piece and the first gear; when the guide piece is fixed relative to the screw rod, the first gear is in guiding fit with the guide piece through the linkage assembly; when the guide piece rotates relative to the screw rod, the guide piece can drive the first gear to rotate through the linkage assembly, so that the first gear and the screw rod can synchronously rotate in the same direction.
2. The switching mechanism of claim 1, wherein the linkage assembly comprises a second gear capable of rotating the first gear, and a first linkage member, the second gear being movable along a length of the guide member, the guide member being capable of rotating the second gear, the first linkage member being capable of moving the second gear and the first gear along the length of the guide member.
3. The switching mechanism of claim 2, wherein the first linkage member is in rotational communication with the second gear and the first gear, respectively.
4. The switching mechanism of claim 2, wherein the linkage assembly further comprises a second linkage member, the first linkage member and the second linkage member cooperate to form a mounting cavity, the second gear and the first gear are rotatably disposed in the mounting cavity, and the mounting cavity is provided with an opening for the first gear to engage.
5. The switching mechanism of claim 2, wherein the second gear is in driving connection with the guide.
6. The switching mechanism of any one of claims 1 to 5, further comprising a mounting unit, wherein the screw is rotatably disposed on the mounting unit.
7. The switching mechanism of claim 6, wherein one end of the screw is provided with a first transmission end, one end of the guide is provided with a second transmission end that is offset from the first transmission end, and the first transmission end and the second transmission end are disposed outside the mounting unit.
8. The switching mechanism of claim 7, further comprising a linkage gear movable relative to the mounting unit, the first drive end being a first drive gear and the second drive end being a second drive gear; when the linkage gear is at a first position, the first transmission gear can rotate, and the second transmission gear cannot rotate; when the linkage gear is located at the second position, the linkage gear is meshed with the first transmission gear and the second transmission gear respectively.
9. The switching mechanism of claim 7, wherein the first drive end is disposed at one end of the threaded rod and the second drive end is disposed proximate another end of the threaded rod.
10. A transmission device comprising the switching mechanism according to any one of claims 6 to 9, and further comprising a switching mechanism including at least two transmission shafts provided in a length direction of the screw, and gear units in one-to-one correspondence with the transmission shafts, the transmission shafts being rotatably mounted to the mounting unit, one end of the transmission shafts being provided with a driven bevel gear; the gear unit comprises a driving bevel gear and a driven gear used for driving the driving bevel gear to rotate, the driving bevel gear and the driven gear can be rotatably arranged on the mounting unit, the driving bevel gear can drive the corresponding driven bevel gear to rotate, and the first gear can selectively drive the driven gear to rotate.
11. An antenna comprising the actuator of claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911424268.7A CN111146594A (en) | 2019-12-31 | 2019-12-31 | Antenna, transmission device and switching mechanism |
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| CN113540796A (en) * | 2021-07-14 | 2021-10-22 | 京信通信技术(广州)有限公司 | Multi-frequency antenna, frequency-selecting phase-modulating mechanism and device |
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Application publication date: 20200512 |