High-precision three-axis turntable with two-axis linkage

Abstract

The invention discloses a high-precision three-axis rotary table with a two-axis linkage function. The high-precision three-axis rotary table comprises a first motor, a second motor and a third motor. The third motor is located on the base, the third motor is connected with the azimuth shaft through a first transmission connection structure, and the azimuth shaft is connected with the base through a rotary support; a transmission supporting piece is arranged on the base, and the first motor and the second motor are installed on the transmission supporting piece. The first motor is connected with a first bevel pinion through a second transmission connection structure, the second motor is connected with the first bevel pinion through a third transmission connection structure, the first bevel pinion is connected with a mounting flange through a fourth transmission connection structure, and the mounting flange is used for mounting an antenna. According to the invention, pitching and polarization linkage is realized by adjusting the speeds and directions of the two motors, and meanwhile, full-coverage pointing of a hemisphere range above a horizontal plane is realized through the two linkage shafts and the azimuth axis.

Description

Technical Field

[0001] The present invention relates to the technical field of low-orbit satellite antennas, and in particular to a high-precision three-axis turntable with two-axis linkage. Background Art

[0002] In order to meet the requirement of satellites passing overhead, antenna turntables for general low-orbit satellite communications usually adopt an XY mount type turntable. For example, the publication number "CN 115036697 A" discloses an XY mount type turntable for low-orbit satellite communications, in which the rotation axis is configured horizontally to avoid the zenith tracking blind spot. However, the XY mount type does not eliminate the blind spot, but only transfers the blind spot of the antenna to the horizon. With the continuous development of communication technology, countries are actively deploying low-orbit constellations, and correspondingly put forward more requirements for satellite communication terminals. Whether it is the defect of the zenith blind spot of the pitch-azimuth type turntable or the defect of the ground plane blind spot of the XY type turntable, neither can fully meet the all-weather real-time tracking of low-orbit satellites. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a high-precision three-axis turntable with two-axis linkage in view of the deficiencies in the above-mentioned prior art, which solves the problem of blind spot defects of the antenna turntable when the existing equipment tracks low-orbit satellites.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-precision three-axis turntable with two-axis linkage, comprising a first motor, a second motor and a third motor; The third motor is located on the base, the third motor is connected to the azimuth shaft via a first transmission connection structure, and the azimuth shaft is connected to the base via a slewing support; A transmission support is provided on the base, and the first motor and the second motor are installed on the transmission support; The first motor is connected to the first small bevel gear through a second transmission connection structure, the second motor is connected to the first small bevel gear through a third transmission connection structure, the first small bevel gear is connected to a mounting flange through a fourth transmission connection structure, and the mounting flange is used for mounting the antenna.

[0005] Furthermore, the second transmission connection structure and the third transmission connection structure are symmetrical.

[0006] Furthermore, the second transmission connection structure includes a first pinion connected to the motor shaft of the first motor, the first pinion meshes with the first large gear, the first large gear meshes with the first worm, the first worm meshes with the first turbine, the first turbine meshes with the third pinion gear, the third pinion gear meshes with the first large bevel gear, the first large bevel gear is coaxially rotatably connected with the second large bevel gear, and the second large bevel gear meshes with the first pinion gear.

[0007] Furthermore, the third transmission connection structure includes a second pinion connected to the motor shaft of the second motor, the second pinion meshes with the second large gear, the second large gear meshes with the second worm, the second worm meshes with the second turbine, the second turbine meshes with the second small bevel gear, the second small bevel gear meshes with the fourth large bevel gear, the fourth large bevel gear is coaxially connected to the third large bevel gear, and the third large bevel gear meshes with the first small bevel gear.

[0008] Furthermore, the first transmission connection structure includes a third small gear connected to the motor shaft of the third motor, the third small gear is meshed with a third large gear, and the third large gear is connected to the azimuth shaft.

[0009] Furthermore, the fourth transmission connection structure includes an output shaft, the output shaft is meshed and linked with the first bevel gear, the output shaft is connected to a transfer flange, and the transfer flange is fixed on the mounting flange.

[0010] Furthermore, the transmission support member includes a first transmission support member and a second transmission support member, the first transmission support member and the second transmission support member are respectively connected to the base, the first transmission support member is installed with the first motor, and the second transmission support member is installed with the second motor.

[0011] Compared with the prior art, the present invention has the following advantages: (1) A high-precision three-axis turntable with two-axis linkage of the present invention realizes pitch and polarization linkage by adjusting the speed and direction of two motors; (2) The present invention provides a high-precision three-axis turntable with two-axis linkage, which achieves full coverage of the hemispherical range above the horizontal plane through two linkage axes and the azimuth axis.

[0012] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure explosion of the present invention; Figure 2 It is a transmission relationship schematic diagram of the present invention; Figure 3 It is a schematic cross-sectional view of the XOZ plane of the present invention; Figure 4 It is a schematic cross-sectional view of the YOZ plane of the present invention; Figure 5 It is a schematic cross-sectional view of 1 / 4 of the shell of the present invention.

[0014] Description of reference numerals: 101, mounting flange; 102, adapter flange; 103, first oil seal; 104, first bearing; 105, second bearing gland; 106, second bearing; 107, output shaft; 108, first small bevel gear; 109, top screw; 201, spherical shell; 202, connecting shaft; 203, first support arm; 204, second support arm; 205, first small bearing end cover; 206, second small bearing end cover; 207, third bearing; 208, fourth bearing; 209, third large bevel gear; 211, fifth bearing; 212, second large bevel gear; 213, fourth large bevel gear; 214, gear shaft; 215 , the first large bevel gear; 216, the sixth bearing; 301, the gear set sleeve; 302, the seventh bearing; 303, the eighth bearing; 304, the seventh bearing cover; 305, the eighth bearing cover; 306, the second small bevel gear; 307, the first input shaft; 308, the second input shaft; 309, the third small bevel gear; 311, the connecting rod; 312, the first turbine; 313, the second turbine; 314, the first bearing group; 315, the turbine upper bearing cover; 316, the first motion shaft; 317, the ninth bearing; 318, the second motion shaft; 319, the tenth bearing; 321, the second turbine baffle; 322, the second shaft Bearing assembly; 323, first turbine baffle; 324, second turbine lower bearing pressure cover; 325, first turbine lower bearing pressure cover; 326, dual-axis sensor; 327, sensor mounting piece; 328, turbine bearing seat; 329, turbine bearing connector; 331, first large gear; 332, first motor fixing piece; 333, first small gear; 334, first motor; 335, second motor; 336, second worm fixing piece; 337, eleventh bearing; 338, second worm; 339, twelfth bearing; 341, second large gear; 342, second small gear; 343, second worm front mounting piece; 345, The second motor fixing member; 346, the second transmission support member; 347, the first worm fixing member; 348, the first worm front mounting member; 349, the thirteenth bearing; 351, the first worm; 352, the first transmission support member; 353, the main control board mounting member; 354, the fourteenth bearing; 355, the main control board; 401, the third motor; 402, the third motor fixing member; 403, the third small gear; 404, the third large gear; 405, the slewing support pressure ring; 406, the slewing support; 407, the azimuth shaft; 408, the second oil seal; 501, the upper shell; 502, the connector; 503, the base; 504, the lower shell. DETAILED DESCRIPTION

[0015] like Figure 1-5 As shown, the present invention provides a high-precision three-axis turntable with two-axis linkage, including a first motor 334, a second motor 335 and a third motor 401; The third motor 401 is located on the base 503, and the third motor 401 is connected to the azimuth shaft 407 through the first transmission connection structure, and the azimuth shaft 407 is connected to the base 503 through the slewing support 406; The base 503 is provided with a transmission support, and the first motor 334 and the second motor 335 are installed on the transmission support; The first motor 334 is connected to the first small bevel gear 108 through a second transmission connection structure, the second motor 335 is connected to the first small bevel gear 108 through a third transmission connection structure, and the first small bevel gear 108 is connected to the mounting flange 101 through a fourth transmission connection structure. The mounting flange 101 is used for installing the antenna.

[0016] The present invention transmits the movements of the first motor 334, the second motor 335 and the third motor 401 respectively through various transmission connection mechanisms, wherein the third motor 401 is used to make the entire turntable rotate in azimuth on the azimuth axis, and the linkage between the first motor 334 and the second motor 335 makes the first small bevel gear 108 perform polarization rotation or pitch rotation, which is then transmitted to the mounting flange 101 for polarization rotation or pitch rotation, thereby making the antenna perform polarization rotation or pitch rotation.

[0017] According to the transmission relationship of the present invention, when the motor shaft of the first motor 334 and the motor shaft of the second motor 335 rotate at the same speed, the motor shaft of the first motor 334 and the motor shaft of the second motor 335 rotate in the same direction so that the mounting flange 101 rotates around the X-axis, that is, performs a pitch rotation, and the motor shaft of the first motor 334 and the motor shaft of the second motor 335 rotate in the opposite direction so that the mounting flange 101 rotates on itself, that is, performs a polarization rotation. When the motor shaft of the first motor 334 and the motor shaft of the second motor 335 rotate at different speeds, no matter whether the motor shaft of the first motor 334 and the motor shaft of the second motor 335 are in the same direction or in the opposite direction, the mounting flange 101 not only performs a pitch rotation, but also performs a polarization rotation.

[0018] Therefore, when adjusting the azimuth of the antenna, it is only necessary to adjust the motor shafts of the first motor 334, the second motor 335 and the third motor 401 to achieve full coverage of the hemispherical range above the horizontal plane.

[0019] In the present invention, in order to make the structure clear and concise, the second transmission connection structure and the third transmission connection structure are symmetrical.

[0020] Among them, the second transmission connection structure includes a first pinion 333 connected to the motor shaft of the first motor 334, the first pinion 333 is meshed with the first large gear 331, the first large gear 331 is meshed with the first worm 351, the first worm 351 is meshed with the first turbine 312, the first turbine 312 is meshed with the third pinion gear 309, the third pinion gear 309 is meshed with the first large bevel gear 215, the first large bevel gear 215 is coaxially rotatably connected with the second large bevel gear 212, and the second large bevel gear 212 is meshed with the first pinion gear 108.

[0021] Among them, the third transmission connection structure includes a second pinion 342 connected to the motor shaft of the second motor 335, the second pinion 342 is meshed with the second large gear 341, the second large gear 341 is meshed with the second worm 338, the second worm 338 is meshed with the second turbine 313, the second turbine 313 is meshed with the second small bevel gear 306, the second small bevel gear 306 is meshed with the fourth large bevel gear 213, the fourth large bevel gear 213 is coaxially connected to the third large bevel gear 209, and the third large bevel gear 209 is meshed with the first small bevel gear 108.

[0022] In the present invention, the first transmission connection structure includes a third small gear 403 connected to the motor shaft of the third motor 401 , the third small gear 403 is meshed with a third large gear 404 , and the third large gear 404 is connected to the azimuth axis 407 .

[0023] In the present invention, the fourth transmission connection structure includes an output shaft 107 , the output shaft 107 is meshed and linked via the first bevel pinion 108 , the output shaft 107 is connected to the adapter flange 102 , and the adapter flange 102 is fixed on the mounting flange 101 .

[0024] In the present invention, the transmission support member includes a first transmission support member 352 and a second transmission support member 346. The first transmission support member 352 and the second transmission support member 346 are respectively connected to the base 503. The first transmission support member 352 is installed with the first motor 334, and the second transmission support member 346 is installed with the second motor 335.

[0025] Specifically in the implementation process, the present invention provides a high-precision three-axis turntable with two-axis linkage; it includes two motor-driven output shafts 107 and one motor-driven azimuth axis 407, is equipped with a dual-axis sensor 326 and a main control board 355, and is connected to the external control through the connector 502 on the lower shell 504.

[0026] The two motors are a first motor 334 (UIM2842-IE / 28-32) and a second motor 335 (UIM2842-IE / 28-32). A first pinion 333 is fixed on the first motor 334, which is further connected to the turbine bearing seat 328 through the first motor fixing member 332. The first pinion 333 is meshed with the first large gear 331. The first large gear 331 is fixed on the first worm 351. The first worm 351 is fixed to the first worm fixing member 347 through the thirteenth bearing 349 (708_AC) and the fourteenth bearing 354 (708_AC). The fourteenth bearing 354 in the first worm fixing member 347 is pressed and fixed by the first worm front mounting member 348. The first worm fixing member 347 is fixed to the turbine bearing seat 328.

[0027] Furthermore, a first bearing group 314 (7000_AC) is installed on the turbine bearing seat 328 and fixed by the first turbine lower bearing pressure cover 325. The first turbine 312 passes through the inner hole of the first bearing group 314 and is connected by the first turbine baffle 323. The upper part of the first turbine 312 is connected to the turbine bearing connector 329 to which the ninth bearing 317 (61800_2Z) is fixed by the turbine upper bearing pressure cover 315. The upper shaft of the first turbine 312 is fixedly connected to the first movement shaft 316 by the top screw 109. The upper part of the first movement shaft 316 is fixedly connected to the first input shaft 307 by the top screw 109. The first input shaft 307 is installed on the connecting rod 311 to which the eighth bearing 303 (61800_2Z) is fixed by the eighth bearing pressure cover 305. The upper part of the first movement shaft 316 is connected and fixed to the third small bevel gear 309. The third small bevel gear 309 is meshed with the first large bevel gear 215. The first large bevel gear 215 is connected to the second large bevel gear 309. Gear 212, gear shaft 214 is connected to the gear set sleeve 301 through the sixth bearing 216 (61800_2Z), the lower part of the gear set sleeve 301 is fixed on the connecting rod 311, and the gear shaft 214 is fixed to the connecting shaft 202 through the first support arm 203 and the second support arm 204, including the second small bearing end cover 206, the fourth bearing 208 (637 / 6), the first small bearing end cover 205, the third bearing 207 (637 / 6), the connecting shaft A second bearing 106 (61800_2Z) is installed on 202 and fixed by a second bearing cover 105. The lower part of the output shaft 107 passes through the inner hole of the second bearing 106 and is connected and fixed to the first small bevel gear 108. The first small bevel gear 108 is meshed with the second large bevel gear 212. The upper part of the output shaft 107 is connected to the first bearing 104 (61800_2Z) and the first oil seal 103 (10-17-3). The outside of the first bearing 104 is connected to the spherical shell 201.

[0028] A second small gear 342 is fixed on the second motor 335 (UIM2842-IE / 28-32), which is further connected to the turbine bearing seat 328 through the second motor fixing piece 345. The second small gear 342 is meshed with the second large gear 341. The second large gear 341 is fixed on the second worm 338. The second worm 338 is fixed to the second worm fixing piece 336 through the eleventh bearing 337 (708_AC) and the twelfth bearing 339 (708_AC). The twelfth bearing 339 in the second worm fixing piece 336 is pressed and fixed by the second worm front mounting piece 343. The second worm fixing piece 336 is fixed to the turbine bearing seat 328.

[0029] Furthermore, a second bearing group 322 (7000_AC) is installed on the turbine bearing seat 328 and fixed by a second turbine lower bearing pressure cover 324. The second turbine 313 passes through the inner hole of the second bearing group 322 and is connected by a second turbine baffle 321. The upper part of the second turbine 313 is connected to a turbine bearing connector 329 to which a tenth bearing 319 (61800_2Z) is fixed by a turbine upper bearing pressure cover 315. The upper shaft of the second turbine 313 is fixedly connected to the second motion shaft 318 by a top screw 109. The upper part of the second motion shaft 318 is connected to the second input shaft. 308 is fixedly connected by a top screw 109, the second input shaft 308 is installed on the connecting rod 311 to which the seventh bearing 302 (61800_2Z) is fixed through the seventh bearing cover 304, the upper part of the second motion shaft 318 is connected and fixed to the second small bevel gear 306, the second small bevel gear 306 is meshed with the fourth large bevel gear 213, the fourth large bevel gear 213 is connected to the third large bevel gear 209, and is connected to the gear shaft 214 through the fifth bearing 211 (61800_2Z), and the first small bevel gear 108 is meshed with the third large bevel gear 209.

[0030] Furthermore, the turbine bearing seat 328 is connected and fixed to the base 503 through the first transmission support 352 and the second transmission support 346. The turbine bearing seat 328 is provided with a main control board mounting member 353, and the main control board 355 is fixed to the main control board mounting member 353 through copper studs. The turbine bearing connector 329 is provided with a sensor mounting member 327, and the dual-axis sensor 326 is fixed to the sensor mounting member 327 through copper studs.

[0031] Furthermore, a slewing support 406 is installed on the base 503 and fixed by a slewing support pressure ring 405. The azimuth shaft 407 passes through the inner hole of the slewing support 406 and is connected to the third large gear 404. A second oil seal 408 is arranged between the azimuth shaft 407 and the base 503. The third large gear 404 is meshed with the third small gear 403. The third small gear 403 is connected to the motor shaft of the third motor 401 (UIM2842-IE / 28-32) and is fixed to the base 503 by the third motor fixing member 402.

[0032] Furthermore, a lower shell 504 is provided to be connected to the base 503 , and an upper shell 501 is connected to the lower shell 504 to wrap the entire transmission mechanism, and a connector 502 is provided on the lower shell 504 .

[0033] Furthermore, the azimuth rotation is achieved by controlling the third motor 401 , and the linkage of pitch and polarization is achieved by controlling the directions and rotation speeds of the first motor 334 and the second motor 335 .

[0034] It is worth noting that the worm gear device is internally arranged in the present invention to ensure that the turntable is self-locking in the power-off state, and the transmission reversing is realized through the multi-stage bevel gear transmission, and the output torque of the two motors is meshed to the first small bevel gear 108 and then output, thereby increasing the output torque.

[0035] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A high-precision three-axis turntable with two-axis linkage, characterized in that: It includes a first motor (334), a second motor (335) and a third motor (401); The third motor (401) is located on the base (503); the third motor (401) is connected to the azimuth shaft (407) via a first transmission connection structure; the azimuth shaft (407) is connected to the base (503) via a slewing support (406); A transmission support is provided on the base (503), and the first motor (334) and the second motor (335) are mounted on the transmission support; The first motor (334) is connected to the first small bevel gear (108) via a second transmission connection structure, the second motor (335) is connected to the first small bevel gear (108) via a third transmission connection structure, the first small bevel gear (108) is connected to the mounting flange (101) via a fourth transmission connection structure, and the mounting flange (101) is used for mounting the antenna.

2. A high-precision three-axis turntable with two-axis linkage according to claim 1, characterized in that: The second transmission connection structure and the third transmission connection structure are symmetrical.

3. A high-precision three-axis turntable with two-axis linkage according to claim 2, characterized in that: The second transmission connection structure comprises a first pinion gear (333) connected to the motor shaft of the first motor (334); the first pinion gear (333) meshes with the first large gear (331); the first large gear (331) meshes with the first worm gear (351); the first worm gear (351) meshes with the first turbine (312); the first turbine (312) meshes with the third pinion gear (309); the third pinion gear (309) meshes with the first large bevel gear (215); the first large bevel gear (215) is coaxially rotatably connected with the second large bevel gear (212); and the second large bevel gear (212) meshes with the first pinion gear (108).

4. A high-precision three-axis turntable with two-axis linkage according to claim 2, characterized in that: The third transmission connection structure comprises a second pinion (342) connected to the motor shaft of the second motor (335); the second pinion (342) meshes with the second large gear (341); the second large gear (341) meshes with the second worm (338); the second worm (338) meshes with the second turbine (313); the second turbine (313) meshes with the second pinion gear (306); the second pinion gear (306) meshes with the fourth large bevel gear (213); the fourth large bevel gear (213) is coaxially rotatably connected to the third large bevel gear (209); and the third large bevel gear (209) meshes with the first pinion gear (108).

5. A high-precision three-axis turntable with two-axis linkage according to claim 1, characterized in that: The first transmission connection structure comprises a third pinion (403) connected to the motor shaft of the third motor (401), the third pinion (403) meshing with a third large gear (404), and the third large gear (404) connected to the azimuth axis (407).

6. A high-precision three-axis turntable with two-axis linkage according to claim 1, characterized in that: The fourth transmission connection structure comprises an output shaft (107), the output shaft (107) is meshed and linked via the first bevel pinion gear (108), the output shaft (107) is connected to an adapter flange (102), and the adapter flange (102) is fixed on the mounting flange (101).

7. A high-precision three-axis turntable with two-axis linkage according to claim 1, characterized in that: The transmission support member comprises a first transmission support member (352) and a second transmission support member (346); the first transmission support member (352) and the second transmission support member (346) are respectively connected to the base (503); the first transmission support member (352) is mounted with the first motor (334); and the second transmission support member (346) is mounted with the second motor (335).

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