Antenna phase shifter transmission device

Abstract

The present invention discloses an antenna phase shifter transmission device, including a transmission input part, a shift selection part and a transmission output part, wherein the transmission input part and the shift selection part are completely separated, and the shift selection part selects to establish a transmission connection with any output end of the transmission output part, thereby adjusting the phase of the phase shifter connected to the output end. The present invention uses two motors to respectively be responsible for power input and selection output, and can select to drive any number of phase shifters, with a compact structure, and the output end of the transmission output part can be spread out flat, which is beneficial to the antenna layout.

Description

Technical Field

[0001] The present invention relates to a transmission device in a mobile communication antenna, and in particular to a transmission device for driving a phase shifter in a mobile communication antenna. Background Art

[0002] The radiation angle of a mobile communication antenna needs to be adjusted according to the change of the main source of the antenna. The method is to drive the phase shifter in the antenna through a transmission device to adjust it. There are often many phase shifters in a mobile communication antenna, and these phase shifters often need to be adjusted differently.

[0003] Currently, most phase shifter driving devices on the market are one-to-one, with one motor controlling one phase shifter individually. To achieve separate adjustment of multiple phase shifters, multiple motors need to be configured. Since motors are expensive and heavy, not only does this make the antenna bulky, it also increases costs.

[0004] To solve this problem, people have also successively developed some one-band and two-band phase shifter transmission devices. For example, the patent application number CN201610049909.5 discloses a solution of an antenna azimuth adjustment device. However, there are the following defects to be improved in this solution: 1. The overall transmission ratio of the solution is insufficient, and the motor needs to be decelerated to increase the torque; 2. The use of gears and racks to mesh and change the rotation to translation transmission mode has the risk of tooth jumping; 3. The power can be transmitted back from the output end (that is, the adjustment driven device in the patent) to the input end (that is, the adjustment active device in the patent), which is easy to damage the structure; 4. The output ports are relatively concentrated and difficult to deploy, which is not conducive to antenna layout. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an antenna phase shifter transmission device which has a compact structure and is convenient for antenna layout.

[0006] To achieve the above object, the present invention proposes the following technical solution: an antenna phase shifter transmission device, comprising: a transmission input part, a gear shift selection part and a transmission output part,

[0007] The transmission input part includes a driving shaft, at least two driving gears axially fixedly mounted on the driving shaft, and a first driving assembly drivingly connected to the driving shaft;

[0008] The shift selection part includes a screw, a transmission assembly mounted on the screw, and a second drive assembly connected to the screw in a transmission manner;

[0009] The transmission output part includes an output shaft and at least two output gear sets rotating on the output shaft, one output gear set corresponding to a driving gear on the driving shaft;

[0010] The first driving assembly drives the driving gear on the driving shaft to rotate synchronously, the second driving assembly drives the screw to rotate, and the transmission assembly slides along the axial direction of the screw driven by the screw, and any driving gear on the driving shaft is selected to establish a transmission connection with a corresponding group of output gear groups on the output shaft.

[0011] Preferably, the first driving assembly includes a first motor, a first worm connected to the first motor, and a first worm wheel meshing with the first worm, the first worm wheel is fixedly mounted on the driving shaft, the first motor drives the first worm to drive the first worm wheel to rotate, and the first worm wheel drives the driving shaft to drive the driving gear to rotate synchronously.

[0012] Preferably, the second drive assembly includes a second motor, a second worm transmission connected to the second motor, and a second worm wheel meshing with the second worm, the second worm wheel is fixedly mounted on the screw, the second motor drives the second worm to rotate, and the second worm drives the second worm wheel to drive the screw to rotate.

[0013] Preferably, the second driving assembly further comprises a reversing gear set, which comprises a plurality of reversing gears, the reversing gears are meshed with each other, and one of the two outermost reversing gears is transmission connected to the second motor, and the other is transmission connected to the second worm gear.

[0014] Preferably, the output gear sets of the transmission output part move relatively independently.

[0015] Preferably, the output gear set includes a sleeve mounted on the output shaft, an output gear mounted on the sleeve, and an output assembly drivingly connected to the output gear, wherein the output gear is connected to the driving gear of the transmission input part.

[0016] Preferably, the output assembly includes a first output worm mounted on a sleeve, a first output worm wheel meshing with the first output worm, and a second output worm drivingly connected to the first output worm wheel, the first output worm rotates synchronously with the sleeve, the first output worm drives the first output worm wheel to rotate, and the first output worm wheel drives the second output worm to rotate.

[0017] Preferably, the transmission assembly includes a nut fixedly mounted on the screw and an idle gear mounted on the nut. The idle gear slides axially along the screw driven by the nut, and selectively engages with any driving gear on the driving shaft and the corresponding output gear on the output shaft to establish a transmission connection.

[0018] Preferably, the screw is located between the driving shaft and the output shaft, and the screw, the driving shaft and the output shaft are all parallel to each other.

[0019] Preferably, the cross-section of the contact portion between the driving shaft and the driving gear, and between the driving shaft and the first worm gear is a regular hexagon, but may also be other shapes if the solution is feasible.

[0020] Preferably, the screw rod and the nut are transmission connected via external and internal threads.

[0021] Preferably, the driving shaft and the driving gear, and the driving shaft and the first worm gear are fixed by a retaining spring.

[0022] Preferably, a wing for limiting relative rotation between the nut and the idle gear is fixed to one end of the nut, and the idle gear is sandwiched between the nut and the wing.

[0023] Preferably, all tooth surfaces of the driving gear, the output gear and the idler gear are chamfered.

[0024] Preferably, each of the second output worm gears is provided with a rack meshing therewith, and the rack is a helical gear and is connected to a phase shifter.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention has two motors responsible for power input and selective output respectively, and can selectively drive any number of phase shifters, which can effectively reduce the number of motors used, has a compact structure, and saves space.

[0027] 2. The output end can be spread out flat, which is conducive to antenna layout, and the number of outputs can be increased or decreased as needed, and the equipment has strong versatility.

[0028] 3. The entire reversing structure uses worm gear transmission to reduce installation requirements, and the entire transmission process is from worm to worm wheel, which increases the reverse transmission resistance. Finally, the output part changes rotation to translation through the connection between the worm and the rack to prevent tooth jumping. At the same time, the transmission from the worm to the worm has self-locking protection to prevent reverse transmission, thereby preventing the position of the phase shifter from changing and ensuring the adjustment accuracy of the phase shifter.

[0029] 4. It has built-in deceleration and does not require additional motor deceleration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention after assembly;

[0031] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0032] Figure 3 It is a schematic diagram of the overall structure of the present invention after removing the shell;

[0033] Figure 4 It is a structural schematic diagram of the transmission input part of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the gear shift selection part of the present invention;

[0035] Figure 6 It is a partial structural schematic diagram of the transmission output part of the present invention;

[0036] Figure 7 It is a schematic diagram of the overall structure of the transmission output part of the present invention.

[0037] Reference numerals:

[0038] 100. Transmission input part, 101. Driving shaft, 102. Driving gear, 103. First motor, 104. First worm, 105. First worm wheel, 200. Gear shift selection part, 201. Screw, 202. Second motor, 203. Second worm, 204. Second worm wheel, 205. Leftmost reversing gear, 206. Rightmost reversing gear, 207. Middle reversing gear, 208. Nut, 209. Idle gear, 210. Wings, 300. Transmission output part, 301. Output shaft, 302. Bushing, 303. Output gear, 304. First output worm, 305. First output worm wheel, 306. Second output worm, 307. Rack, 308. Output gear set, 400. Housing. DETAILED DESCRIPTION

[0039] The technical solutions of the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention.

[0040] Combination Figure 1 to Figure 3 As shown, an antenna phase shifter transmission device disclosed in an embodiment of the present invention includes a transmission input part 100, a shift selection part 200 and a transmission output part 300, wherein the transmission input part 100 and the shift selection part 200 are completely separated, and the shift selection part 200 selects to establish a transmission connection with any output end of the transmission output part 300, so as to adjust the phase of the phase shifter (not shown) connected to the output end.

[0041] Specifically, combined Figure 4 As shown, the transmission input part 100 includes a driving shaft 101 , at least two driving gears 102 and a first driving assembly. The driving gears 102 are evenly distributed along the axial direction of the driving shaft 101 , and each driving gear 102 is fixedly mounted on the driving shaft 101 .

[0042] The first driving assembly is used to drive the driving shaft 101 to drive all the driving gears 102 installed thereon to rotate synchronously. Specifically, in this embodiment, the first driving assembly includes a first motor 103, a first worm 104 and a first worm wheel 105. The extension direction of the rotating shaft of the first motor 103 is perpendicular to the driving shaft 101. The first worm 104 is connected to the rotating shaft of the first motor 103 or shares the rotating shaft with the first motor 103. When the first motor 103 drives its own rotating shaft to rotate axially, the first worm 104 will rotate synchronously along the axial direction; the first worm wheel 105 is installed on the driving shaft 101 and is located between the two driving gears 102. The first worm wheel 105 is meshed with the first worm 104, and the two cooperate to achieve 90° reversing rotation, that is, after the rotation of the first worm 104 is transmitted to the first worm wheel 105, the first worm wheel 105 rotates synchronously in the radial direction. When the first worm wheel 105 rotates, it drives all the driving gears 102 on the driving shaft 101 to rotate synchronously in the radial direction.

[0043] In this embodiment, the driving gear 102 and the first worm gear 105 are both positioned and fixed on the driving shaft 101 by means of a retaining spring (not shown in the figure), and in order to make the driving gear 102, the first worm gear 105 and the driving shaft 101 rotate synchronously, the cross-section of the contact portion between the driving shaft 101 and the driving gear 102, and between the driving shaft 101 and the first worm gear 105 is set to be a regular hexagon.

[0044] The transmission input part of the present invention adopts a worm gear structure for power transmission from the first motor 103 to the driving shaft 101, which does not interfere with the installation of the driving gear 102, so that the driving gear 102 can be adjusted in position (such as adjusting the spacing between the driving gears) and quantity as needed. Compared with the existing structure that uses helical gears to achieve transmission, the worm gear has a low installation accuracy, which greatly prevents the phenomenon of tooth jumping.

[0045] Combination Figure 5 As shown, the shift selection part 200 specifically includes a screw 201, a second drive assembly and a transmission assembly. The screw 201 is parallel to the driving shaft 101, and the surface of the screw 201 has an external thread (not shown). The second drive assembly is used to drive the screw 201 to rotate radially, and specifically includes a second motor 202, a reversing gear set, a second worm 203 and a second worm wheel 204. The extension direction of the rotation axis of the second motor 202 is perpendicular to both the driving shaft 101 and the screw 201, and the second motor 202 drives its own rotation axis to rotate axially.

[0046] The reversing gear set is used to convert the axial rotation of the rotating shaft of the second motor 202 into radial rotation. In this embodiment, the reversing gear set includes a plurality of reversing gears, each of which is fixed on a rotating shaft. The extension direction of each rotating shaft is also perpendicular to the driving shaft 101 and the screw 201. The reversing gears are meshed with each other, and the two outermost reversing gears (for the convenience of the following description, the two outermost reversing gears are defined here as the leftmost reversing gear 205 and the rightmost reversing gear 206, and the reversing gear located between the leftmost and rightmost reversing gears 205 and 206 is defined as the middle reversing gear 207), wherein the leftmost reversing gear 205 is transmission-connected to the rotating shaft of the second motor 202 or shares a rotating shaft with the second motor 202, and the rightmost reversing gear 206 is transmission-connected to the second worm 203. In this way, the rotating shaft of the second motor 202 drives the leftmost reversing gear shaft 205 connected thereto to rotate axially, and the reversing gear 205 then drives the intermediate reversing gear 207 meshing therewith to rotate axially, which is in turn transmitted to the rightmost reversing gear 206 connected to the second worm 203 for transmission.

[0047] The second worm 203 is connected to the rotating shaft of the rightmost reversing gear 206 or shares a rotating shaft with the rightmost reversing gear 206 . The rightmost reversing gear 206 drives the second worm 203 to perform synchronous axial rotation.

[0048] The second worm gear 204 is fixedly mounted on the screw 201 and meshes with the second worm 203. In this embodiment, the second worm gear 204 is fixedly mounted on the right end of the screw 201. The second worm gear 204 cooperates with the second worm 203 to achieve 90° reversal rotation, that is, after the rotation of the second worm 203 is transmitted to the second worm gear 204, the second worm gear 204 rotates synchronously in the radial direction, and the second worm gear 204 rotates while driving the screw 201 to rotate synchronously.

[0049] The transmission assembly is mounted on the screw 201, and is used to slide along the axial direction of the screw 201 under the drive of the screw 201. Specifically, in this embodiment, the transmission assembly includes a nut 208 and an idler gear 209. The inner surface of the nut 208 is provided with an internal thread (not shown) that matches the external thread on the screw 201. When the screw 201 rotates radially, the nut 208 is driven to slide along its axial direction; the idler gear 209 is mounted on the nut 208 and slides synchronously with the nut 208 along the axial direction of the screw 201.

[0050] Preferably, a wing 210 is fixed at one end of the nut 208 to limit the relative rotation between the nut 208 and the idle gear 209. The idle gear 209 is clamped between the nut 208 and the wing 210. At the same time, the wing 210 on the nut 208 also acts as a shaft shoulder.

[0051] Combination Figure 6 and Figure 7As shown, the transmission output part 300 specifically includes an output shaft 301 and at least two output gear sets 308 mounted on the output shaft 301. The output shaft 301 does not rotate and is responsible for supporting each set of output gear sets 308. The movements of each output gear set 308 on the output shaft 301 are independent and do not interfere with each other. Which output gear set 308 moves depends on the movement position of the idle gear 209 of the shift selection part. In this embodiment, the positional relationship between the driving shaft 101, the screw 201 and the output shaft 301 is that the three are parallel to each other, and the screw 201 is located between the driving shaft 101 and the output shaft 301.

[0052] Each output gear set 308 includes a sleeve 302, an output gear 303 and an output assembly. The sleeve 302 is sleeved on the output shaft 301, and the output gear 303 is installed on the sleeve 302. The output gear 303 corresponds to the driving gear 102 of the transmission input part one by one (that is, the positions and quantities of the two are corresponding). The output gear 303 drives the sleeve 302 to rotate synchronously. The idle gear 209 of the shift selection part selects to mesh with different driving gears 102 and corresponding output gears 303 according to its different sliding positions, establishes a transmission connection, and realizes the selected transmission.

[0053] Preferably, in order to facilitate the axial movement engagement of the idle gear 209 with the driving gear 102 and the output gear 303 , all tooth surfaces of the driving gear 102 , the output gear 303 and the idle gear 209 of this embodiment are chamfered.

[0054] Each output assembly includes a first output worm 304, a first output worm wheel 305, and a second output worm 306. The first output worm 304 is also mounted on the sleeve 302, and rotates radially synchronously with the sleeve 302. The first output worm wheel 305 meshes with the first output worm 304 to achieve a 90° reversing transmission, that is, the first output worm wheel 305 rotates axially synchronously with the first output worm 304.

[0055] The second output worm 306 is connected to the first output worm wheel 305 in a transmission manner. The second output worm 306 and the first output worm wheel 305 may share a rotating shaft or the rotating shaft of the second output worm 306 is connected to the rotating shaft of the first output worm wheel 305. The extending direction of the rotating shaft of the first output worm wheel 305 is perpendicular to the output shaft 301. The rotation of the first output worm wheel 305 is transmitted to the second output worm 306, driving the second output worm 306 to rotate synchronously.

[0056] Each second output worm 306 is also provided with a gear rack 307 meshing therewith. The gear rack 307 is helical gear and connected to a phase shifter. The gear rack 307 rotates axially synchronously with the second output worm 306 , thereby driving the phase shifter connected thereto to move and adjust its phase.

[0057] In addition, the antenna phase shifter actuator of this embodiment is integrally mounted on a housing 400, and the housing 400 serves to support and install various components.

[0058] The present invention has two motors responsible for power input and output selection respectively, and can selectively drive any number of phase shifters. The structure is compact, and the output end of the transmission output part can be spread out flat, and the output quantity can be increased or decreased as needed. In addition, the entire reversing structure uses worm gear transmission to reduce installation requirements, and the entire transmission process is from worm to worm wheel, which increases the reverse transmission resistance. Finally, the output part changes rotation into translation through the connection between the worm and the infinite turbine to prevent tooth jumping. At the same time, the transmission from the turbine to the worm has self-locking protection to prevent reverse transmission, thereby preventing the position of the phase shifter from changing.

[0059] The technical contents and technical features of the present invention have been disclosed as above. However, those skilled in the art may still make various substitutions and modifications based on the teachings and disclosures of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to the contents disclosed in the embodiments, but should include various substitutions and modifications that do not depart from the present invention and are covered by the claims of this patent application.

Claims

1. An antenna phase shifter transmission device, characterized in that: include: Transmission input part, gear shift selection part and transmission output part, The transmission input part includes a driving shaft, at least two driving gears axially fixedly mounted on the driving shaft, and a first driving assembly drivingly connected to the driving shaft; The shift selection part includes a screw, a transmission assembly mounted on the screw, and a second drive assembly connected to the screw in a transmission manner; The transmission output part includes an output shaft and at least two output gear sets rotating on the output shaft, one output gear set corresponding to a driving gear on the driving shaft; The first driving assembly drives the driving gear on the driving shaft to rotate synchronously, the second driving assembly drives the screw to rotate, and the transmission assembly slides along the axial direction of the screw driven by the screw, and any driving gear on the driving shaft is selected to establish a transmission connection with a corresponding group of output gear groups on the output shaft.

2. The antenna phase shifter actuator according to claim 1, characterized in that: The first driving assembly includes a first motor, a first worm connected to the first motor, and a first worm wheel meshing with the first worm. The first worm wheel is fixedly mounted on the driving shaft. The first motor drives the first worm to drive the first worm wheel to rotate. The first worm wheel drives the driving shaft to drive the driving gear to rotate synchronously.

3. The antenna phase shifter actuator according to claim 1, characterized in that: The second driving assembly includes a second motor, a second worm gear transmission-connected to the second motor, and a second worm wheel meshing with the second worm gear. The second worm wheel is fixedly mounted on the screw. The second motor drives the second worm gear to rotate, and the second worm gear drives the second worm wheel to drive the screw gear to rotate.

4. The antenna phase shifter actuator according to claim 3, characterized in that: The second driving assembly also includes a reversing gear set, which includes a plurality of reversing gears that are meshed with each other, and one of the two outermost reversing gears is transmission-connected to the second motor, and the other is transmission-connected to the second worm gear.

5. The antenna phase shifter actuator according to claim 1, characterized in that: The output gear sets of the transmission output part move relatively independently.

6. The antenna phase shifter actuator according to claim 1 or 5, characterized in that: The output gear set includes a sleeve mounted on the output shaft, an output gear mounted on the sleeve and an output assembly drivingly connected to the output gear. The output gear corresponds to the driving gear of the transmission input part one by one, and the sleeve rotates synchronously with the output gear.

7. The antenna phase shifter actuator according to claim 6, characterized in that: The output assembly includes a first output worm mounted on a sleeve, a first output worm wheel meshing with the first output worm, and a second output worm wheel drivingly connected to the first output worm wheel. The first output worm wheel rotates synchronously with the sleeve, the first output worm wheel drives the first output worm wheel to rotate, and the first output worm wheel drives the second output worm wheel to rotate.

8. The antenna phase shifter actuator according to claim 6, characterized in that: The transmission assembly includes a nut fixedly mounted on the screw and an idle gear mounted on the nut. The idle gear slides along the axial direction of the screw driven by the nut, and selectively meshes with any driving gear on the driving shaft and the corresponding output gear on the output shaft to establish a transmission connection.

9. The antenna phase shifter actuator according to claim 1, characterized in that: The screw rod is located between the driving shaft and the output shaft, and the screw rod, the driving shaft and the output shaft are all parallel to each other.

10. The antenna phase shifter actuator according to claim 7, characterized in that: Each of the second output worms is provided with a rack meshing therewith, wherein the rack is a helical gear and is connected to a phase shifter.

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