High-precision servo heavy-load rotary table device and method

Abstract

The application discloses a high-precision servo heavy-load rotary table device and method, and belongs to the technical field of heavy-load rotary tables. The high-precision servo heavy-load rotary table device comprises a fixed platform, a thrust aligning roller bearing is fixedly installed on the fixed platform, a driving mechanism is arranged on the fixed frame, a speed reduction mechanism is arranged in the fixed frame, and a positioning mechanism is arranged on the outer side of the lower end of the rotary table body. The application realizes the recording of the rotation data of the driving shaft by synchronous rotation of the driving shaft and the output shaft of the encoder driven by the rotating disc, can accurately control the angular position of the rotary table body, improves the control precision, can monitor the motion state of the rotary table body in real time, and drives the anti-skid positioning block to move towards the rotary table body by the positioning motor until the rotary table body is tightly pressed, so that the rotary table body is prevented from continuously moving after the driving motor is turned off due to the inertial effect, and the accuracy of the rotary table body is improved.

Description

Technical Field

[0001] This invention belongs to the field of heavy-duty turntable technology, and particularly relates to a high-precision servo heavy-duty turntable device and method. Background Technology

[0002] A servo heavy-duty rotary table is a rotating device with high load-bearing capacity, typically used in applications requiring precise rotation and positioning. Chinese Patent Publication No. CN109596430B discloses a heavy-duty precision rotary table, comprising a rotary cylinder, a thrust self-aligning roller bearing, a rotary platform, a drive component, a transmission component, and a fixed component. The rotary cylinder, drive component, and transmission component are all mounted on the fixed component. The thrust self-aligning roller bearing is connected to the bottom of the rotary cylinder and to the bottom of the piston. The rotary platform is located at the top of the rotary cylinder and connected to the top of the piston. The drive component is connected to the rotary platform via the transmission component to drive the rotary platform to rotate synchronously with the piston of the rotary cylinder. The rotary cylinder bears the load during the test. The rotary cylinder has a high load-bearing capacity, and the thrust self-aligning roller bearing restricts contact between the piston and the upper end cover of the rotary cylinder, keeping the piston in a suspended state. Furthermore, under the action of the thrust self-aligning roller bearing, the piston remains vertical, improving the rotational stability of the rotary platform.

[0003] The problem with the existing technology is that the turntable is connected to the rotary cylinder. After the rotary cylinder is closed, the turntable will continue to rotate at a certain angle under the action of heavy load inertia. It is difficult to accurately detect and control the position of the turntable, resulting in low positioning accuracy and low operational reliability. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a high-precision servo heavy-duty turntable device, which has the advantages of accurate positioning, easy control, and reliable operation. It solves the problem that existing turntables are connected to the turntable by a rotary cylinder. After the rotary cylinder is closed, the turntable will continue to rotate a certain angle under the action of heavy load inertia, making it difficult to accurately detect and control the position of the turntable, resulting in low positioning accuracy and low operational reliability.

[0005] This invention is implemented as follows: a high-precision servo heavy-duty turntable device includes a fixed platform, on which a thrust self-aligning roller bearing is fixedly installed. A turntable body is fixedly installed inside the thrust self-aligning roller bearing via an mounting sleeve. A fixed frame is fixedly installed on the lower surface of the fixed platform, and a drive mechanism is provided on the fixed frame. A reduction mechanism is provided inside the fixed frame, and the middle part of the reduction mechanism is rotatably connected to the middle of the lower surface of the turntable body via a mounting seat. A positioning mechanism is provided on the outer side of the lower end of the turntable body, and the positioning mechanism is fixedly connected to the inner side of the upper end of the fixed frame.

[0006] As a preferred embodiment of the present invention, the thrust self-aligning roller bearing includes an inner ring, balls, and an outer ring. The outer ring is fixedly installed inside the fixed platform, and the balls are rotatably connected between the inner ring and the outer ring. The upper surface of the inner ring is provided with a plurality of mounting grooves. The upper end of the mounting sleeve is interference-fitted with the mounting grooves, and the lower end of the mounting sleeve is fixedly connected to the inner wall of the inner ring. The turntable body is fixedly installed inside the mounting sleeve.

[0007] In a preferred embodiment of the present invention, the reduction mechanism includes an internal gear ring, a sun gear, and three planetary gears. A connecting ring is fixedly connected to the outer circumferential surface of the internal gear ring, and the connecting ring is fixedly sleeved on the outer circumferential surface of the bottom of the turntable body. The three planetary gears are circumferentially arranged between the internal gear ring and the sun gear, and mesh with the internal gear ring and the sun gear. A bushing is fixedly connected inside the sun gear, and the bushing is rotatably connected inside the mounting base.

[0008] As a preferred embodiment of the present invention, each of the three planetary gears is fixedly connected to a second rotating shaft, and the bottom of each of the three second rotating shafts is rotatably connected to a base, which is fixedly installed on the inner wall of the lower end of the fixing frame.

[0009] In a preferred embodiment of the present invention, the driving mechanism includes a drive motor, an encoder, and a fixed plate. The fixed plate is fixedly connected to the lower surface of one end of the fixed frame. The drive motor and the encoder are both fixedly installed on one side of the fixed plate. The output end of the drive motor is fixedly connected to a drive shaft, and the output end of the encoder is fixedly installed with a driven shaft.

[0010] In a preferred embodiment of the present invention, the drive shaft rotates through the fixed frame, and a turntable is fixedly sleeved at the end of the drive shaft near the drive motor. The turntable is in rolling connection with the inner wall of the driven shaft. A worm gear is fixedly connected at the end of the drive shaft away from the drive motor. The connection between the worm gear and the drive shaft is rotatably mounted in a fixed seat, and the fixed seat is fixedly mounted on the lower inner wall of the fixed frame.

[0011] In a preferred embodiment of the present invention, a worm wheel and a first rotating shaft are provided on one side of the worm. The bottom of the first rotating shaft is rotatably mounted on the inner wall of the fixed frame, and the top of the first rotating shaft is fixedly sleeved inside the bushing. The worm wheel is fixedly sleeved in the middle of the first rotating shaft, and the worm wheel is meshed with the worm.

[0012] In a preferred embodiment of the present invention, the positioning mechanism includes a first fixing block, a positioning motor, a second fixing block, and a guide rail. The first fixing block, the second fixing block, and the guide rail are fixedly installed on the inner side wall of the upper end of the fixing frame. The positioning motor is fixedly installed on the first fixing block. The output end of the positioning motor is fixedly connected to a third rotating shaft. The upper and lower ends of the third rotating shaft are respectively fixedly fitted with a drive gear and an eccentric rotating block. A transmission gear ring is rotatably connected inside the guide rail, and the transmission gear ring meshes with the drive gear.

[0013] In a preferred embodiment of the present invention, a guide block is fixedly connected to the upper surface of the second fixed block, an anti-slip positioning block is provided on one side of the eccentric rotating block, a movable groove is provided at the bottom of the anti-slip positioning block, the movable groove is slidably connected to the guide block, an anti-slip groove is provided on the side of the anti-slip positioning block near the eccentric rotating block, and the eccentric rotating block abuts against the inner wall of the anti-slip groove.

[0014] This invention also provides a method for using a high-precision servo heavy-duty turntable device, specifically including the following steps:

[0015] S1: Start the drive motor, which drives the drive shaft and worm gear to rotate. The worm gear drives the worm wheel and the first rotating shaft to rotate. While the drive shaft is rotating, it also drives the turntable to rotate. The turntable then drives the driven shaft to rotate. During the rotation of the driven shaft, it drives the output shaft of the encoder to rotate synchronously, thereby recording the rotation data of the drive shaft. The start and stop of the drive motor are controlled according to the parameters set in the system, thereby controlling the start and stop of the turntable body, accurately positioning the angular position of the turntable body, improving control accuracy, and monitoring the motion status of the turntable body in real time.

[0016] S2: The first rotating shaft drives the sun gear to rotate, which in turn drives the planetary gear to rotate. The planetary gear drives the second rotating shaft to rotate on the base and meshes with the internal gear ring, thereby driving the connecting ring and the turntable body to rotate at a low speed. This facilitates reducing the speed of the turntable body and increasing the torque, giving the turntable body greater driving force and providing precise speed and torque control, which helps to achieve precise positioning and motion control of the turntable body.

[0017] S3: When the parameters detected by the drive motor are consistent with the system preset parameters, the positioning motor starts. The positioning motor drives the third rotating shaft to rotate, which in turn drives the drive gear and the eccentric rotating block to rotate synchronously. The drive gear drives the transmission gear ring to rotate, causing the eccentric rotating blocks on both sides to rotate synchronously. The eccentric part of the eccentric rotating block moves into the anti-slip groove and pushes the anti-slip positioning block to move closer to the turntable body until the anti-slip positioning block presses against the turntable body. This prevents the turntable body from continuing to move due to inertia after the drive motor is turned off, thus improving the accuracy of the turntable body's rotation position.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By setting a thrust self-aligning roller bearing, the present invention can automatically adjust the center position to a certain extent, compensate for the skewness or installation error of the turntable body, and has a high load-bearing capacity, which can withstand a large axial load, thus improving the stability and reliability of operation.

[0020] 2. This invention sets up a turntable to drive the driven shaft to rotate. During the rotation of the driven shaft, the output shaft of the encoder rotates synchronously, thereby recording the rotation data of the drive shaft. The start and stop of the drive motor are controlled according to the parameters set in the system, thereby realizing the control of the start and stop of the turntable body. It can accurately position the angle of the turntable body, improve the control accuracy, and also monitor the motion status of the turntable body in real time.

[0021] 3. By setting the drive mechanism and the deceleration mechanism to work together, the present invention can reduce the speed and increase the torque, so that the turntable body has a greater driving force, provides precise speed and torque control, and helps to achieve precise positioning and motion control of the turntable body.

[0022] 4. This invention electrically connects the positioning motor, drive motor, and encoder to the control terminal of the equipment. The control terminal coordinates the work of each mechanism. When the parameters detected by the drive motor are consistent with the preset parameters of the system, the positioning motor starts and drives the anti-slip positioning block to move towards the turntable body until it is pressed against the turntable body. This prevents the turntable body from continuing to move due to inertia after the drive motor is turned off, thereby improving the accuracy of the turntable body's rotation position. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0024] Figure 2 This is an exploded view of the upper part of the structure of the present invention;

[0025] Figure 3 This is an exploded view of the lower half of the structure of the present invention;

[0026] Figure 4 This is a side view of the structure of the present invention;

[0027] Figure 5 For the present invention Figure 4 Schematic diagram of the three-dimensional structure of the AA cross section;

[0028] Figure 6 For the present invention Figure 5 Enlarged view of the structure at point A in the middle;

[0029] Figure 7 For the present invention Figure 4 Schematic diagram of the three-dimensional structure of the BB cross section;

[0030] Figure 8 For the present invention Figure 7 Enlarged view of the structure at point B in the middle;

[0031] Figure 9 This is an exploded view of a partial structure of the positioning mechanism in this invention;

[0032] Figure 10 This is a cross-sectional view of the anti-slip positioning block in this invention.

[0033] In the diagram: 1. Fixed platform; 2. Thrust self-aligning roller bearing; 201. Inner ring; 202. Mounting groove; 203. Ball bearing; 204. Outer ring; 3. Drive mechanism; 301. Drive motor; 302. Encoder; 303. Fixing plate; 304. Drive shaft; 305. Turntable; 306. Driven shaft; 307. Fixing seat; 308. Worm gear; 309. Worm wheel; 310. First rotating shaft; 4. Reduction mechanism; 401. Internal gear ring; 402. Sun gear; 403. Planetary gear; 404. Second rotating shaft; 405. Bushing; 406. Connecting ring; 407. Base; 5. Positioning mechanism; 501. First fixing block; 502. Positioning motor; 503. Second fixing block; 504. Guide rail; 505. Transmission gear ring; 506. Third rotating shaft; 507. Drive gear; 508. Eccentric rotating block; 509. Anti-slip positioning block; 510. Anti-slip groove; 511. Movable groove; 512. Guide block; 6. Turntable body; 7. Mounting sleeve; 8. Mounting base; 9. Fixing frame. Detailed Implementation

[0034] To further understand the invention's content, features, and effects, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0035] The structure of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1 to 10 As shown in the figure, a high-precision servo heavy-duty turntable device provided by the present invention includes a fixed platform 1, on which a thrust self-aligning roller bearing 2 is fixedly installed. A turntable body 6 is fixedly installed inside the thrust self-aligning roller bearing 2 through a mounting sleeve 7. A fixed frame 9 is fixedly installed on the lower surface of the fixed platform 1. A drive mechanism 3 is provided on the fixed frame 9. A reduction mechanism 4 is provided inside the fixed frame 9. The middle part of the reduction mechanism 4 is rotatably connected to the middle part of the lower surface of the turntable body 6 through a mounting seat 8. A positioning mechanism 5 is provided on the outer side of the lower end of the turntable body 6. The positioning mechanism 5 is fixedly connected to the inner side of the upper end of the fixed frame 9.

[0037] Furthermore, the thrust self-aligning roller bearing 2 includes an inner ring 201, balls 203 and an outer ring 204. The outer ring 204 is fixedly installed inside the fixed platform 1. The balls 203 are tumbling between the inner ring 201 and the outer ring 204. The upper surface of the inner ring 201 is provided with several mounting grooves 202. The upper end of the mounting sleeve 7 is interference-fitted with the mounting grooves 202. The lower end of the mounting sleeve 7 is fixedly connected to the inner wall of the inner ring 201. The turntable body 6 is fixedly installed inside the mounting sleeve 7.

[0038] In this application, the thrust self-aligning roller bearing 2 can automatically adjust its center position to a certain extent, compensate for the misalignment or installation error of the turntable body 6, and has a high load-bearing capacity, capable of withstanding large axial loads, thus improving the stability and reliability of operation. By opening an installation groove 202 on the upper surface of the inner ring 201, the upper end of the installation sleeve 7 is snapped into the installation groove 202 and fixed, which can improve the tightness of the connection between the installation sleeve 7 and the inner ring 201, thereby improving the stability of the turntable body 6 within the thrust self-aligning roller bearing 2.

[0039] Furthermore, the reduction mechanism 4 includes an internal gear ring 401, a sun gear 402, and three planetary gears 403. A connecting ring 406 is fixedly connected to the outer circumferential surface of the internal gear ring 401. The connecting ring 406 is fixedly sleeved on the bottom outer circumferential surface of the turntable body 6. The three planetary gears 403 are circumferentially arranged between the internal gear ring 401 and the sun gear 402, and mesh with the internal gear ring 401 and the sun gear 402. A bushing 405 is fixedly connected inside the sun gear 402. The bushing 405 is rotatably connected inside the mounting base 8. A second rotating shaft 404 is fixedly connected inside each of the three planetary gears 403. The bottom of each of the three second rotating shafts 404 is rotatably connected inside the base 407. The base 407 is fixedly installed on the lower inner wall of the fixed frame 9.

[0040] In this application, the reduction mechanism 4 can reduce the speed and increase the torque, giving the turntable body 6 a greater driving force and providing precise speed and torque control, which helps to achieve precise positioning and motion control of the turntable body 6. The internal gear ring 401 is fixedly connected to the turntable body 6 through the connecting ring 406. The sun gear 402 is rotatably connected to the bottom of the turntable body 6 through the bushing 405 and the mounting seat 8. During operation, the sun gear 402 drives the planetary gear 403 to rotate. The planetary gear 403 drives the second rotating shaft 404 to rotate on the base 407 and meshes with the internal gear ring 401, thereby driving the connecting ring 406 and the turntable body 6 to rotate at low speed. The sun gear 402 is driven by the drive mechanism 3.

[0041] Furthermore, the drive mechanism 3 includes a drive motor 301, an encoder 302, and a fixing plate 303. The fixing plate 303 is fixedly connected to the lower surface of one end of the fixing frame 9. The drive motor 301 and the encoder 302 are both fixedly installed on one side of the fixing plate 303. The output end of the drive motor 301 is fixedly connected to a drive shaft 304, and the output end of the encoder 302 is fixedly installed with a driven shaft 306. The drive shaft 304 rotates through the fixing frame 9. A turntable 305 is fixedly sleeved on the end of the drive shaft 304 near the drive motor 301. The turntable 305 and the inner wall of the driven shaft 306 are connected. A rolling connection is used, with a worm 308 fixedly connected to the end of the drive shaft 304 away from the drive motor 301. The connection between the worm 308 and the drive shaft 304 is rotatably mounted in a fixed seat 307. The fixed seat 307 is fixedly mounted on the lower inner wall of the fixed frame 9. A worm wheel 309 and a first rotating shaft 310 are provided on one side of the worm 308. The bottom of the first rotating shaft 310 is rotatably mounted on the inner wall of the fixed frame 9. The top of the first rotating shaft 310 is fixedly sleeved inside the bushing 405. The worm wheel 309 is fixedly sleeved in the middle of the first rotating shaft 310. The worm wheel 309 is meshed with the worm 308.

[0042] In this application, the drive mechanism 3 and the reduction mechanism 4 work together to drive the turntable body 6 to rotate, providing a larger reduction ratio and higher transmission accuracy, and can withstand a larger load. During operation, the drive motor 301 drives the drive shaft 304 and the worm gear 308 to rotate, and the worm gear 308 drives the worm wheel 309 and the first rotating shaft 310 to rotate, thereby driving the sun gear 402 to rotate, so that the reduction mechanism 4 can work. While the drive shaft 304 is rotating, it also drives the turntable 305 to rotate, and the turntable 305 drives the driven shaft 306 to rotate. During the rotation of the driven shaft 306, the output shaft of the encoder 302 rotates synchronously, realizing the recording of the rotation data of the drive shaft 304. The start and stop of the drive motor 301 are controlled according to the parameters set in the system, thereby realizing the start and stop control of the turntable body 6. It can accurately position the angle of the turntable body 6, improve the control accuracy, and also monitor the motion status of the turntable body 6 in real time.

[0043] Furthermore, the positioning mechanism 5 includes a first fixing block 501, a positioning motor 502, a second fixing block 503, and a guide rail 504. The first fixing block 501, the second fixing block 503, and the guide rail 504 are fixedly installed on the inner side wall of the upper end of the fixing frame 9. The positioning motor 502 is fixedly installed on the first fixing block 501. The output end of the positioning motor 502 is fixedly connected to a third rotating shaft 506. The upper and lower ends of the third rotating shaft 506 are respectively fixedly sleeved with a drive gear 507 and an eccentric rotating block 508. The guide rail 502... 4. An internally rotating transmission gear ring 505 is connected to the drive gear 507. The transmission gear ring 505 is meshed with the drive gear 507. A guide block 512 is fixedly connected to the upper surface of the second fixed block 503. An anti-slip positioning block 509 is provided on one side of the eccentric rotating block 508. A movable groove 511 is opened at the bottom of the anti-slip positioning block 509. The movable groove 511 is slidably connected to the guide block 512. An anti-slip groove 510 is opened on the side of the anti-slip positioning block 509 near the eccentric rotating block 508. The eccentric rotating block 508 abuts against the inner wall of the anti-slip groove 510.

[0044] In this application, the positioning mechanism 5 can limit the turntable body 6 and assist the turntable body 6 to stop quickly. The positioning motor 502, drive motor 301, and encoder 302 are electrically connected to the equipment's control terminal, which coordinates the operation of each mechanism. When the parameters detected by the drive motor 301 match the system's preset parameters, the positioning motor 502 starts, driving the third rotating shaft 506 to rotate. The third rotating shaft 506 drives the drive gear 507 and the eccentric rotating block 508 to rotate synchronously. The drive gear 507 drives the transmission gear ring 505 to rotate, causing the eccentric blocks on both sides to rotate. The rotating block 508 rotates synchronously, and the eccentric part of the eccentric rotating block 508 moves into the anti-slip groove 510, pushing the anti-slip positioning block 509 to move closer to the turntable body 6 until the anti-slip positioning block 509 presses against the turntable body 6, preventing the turntable body 6 from continuing to move after the drive motor 301 is turned off due to inertia, thereby improving the accuracy of the rotation position of the turntable body 6. By setting the guide block 512 to slide with the movable groove 511, it can guide and limit the anti-slip positioning block 509, improve the stability of the movement of the anti-slip positioning block 509 and the tightness of the connection with the turntable body 6.

[0045] like Figures 1-10 As shown in the figure, the method of using a high-precision servo heavy-duty turntable device provided by an embodiment of the present invention includes the following steps:

[0046] S1: Start the drive motor 301, which drives the drive shaft 304 and worm gear 308 to rotate. The worm gear 308 drives the worm wheel 309 and the first rotating shaft 310 to rotate. While the drive shaft 304 is rotating, it also drives the turntable 305 to rotate. The turntable 305 then drives the driven shaft 306 to rotate. During the rotation of the driven shaft 306, the output shaft of the encoder 302 rotates synchronously, thereby recording the rotation data of the drive shaft 304. The start and stop of the drive motor 301 are controlled according to the parameters set in the system, thereby controlling the start and stop of the turntable body 6, accurately positioning the angular position of the turntable body 6, improving control accuracy, and monitoring the motion status of the turntable body 6 in real time.

[0047] S2: The first rotating shaft 310 drives the sun gear 402 to rotate, which in turn drives the planet gear 403 to rotate. The planet gear 403 drives the second rotating shaft 404 to rotate on the base 407 and meshes with the internal gear ring 401, thereby driving the connecting ring 406 and the turntable body 6 to rotate at a low speed. This facilitates reducing the rotational speed of the turntable body 6 and increasing the torque, giving the turntable body 6 greater driving force and providing precise speed and torque control, which helps to achieve precise positioning and motion control of the turntable body 6.

[0048] S3: When the parameters detected by the drive motor 301 are consistent with the system preset parameters, the positioning motor 502 starts. The positioning motor 502 drives the third rotating shaft 506 to rotate. The third rotating shaft 506 drives the drive gear 507 and the eccentric rotating block 508 to rotate synchronously. The drive gear 507 drives the transmission gear ring 505 to rotate, so that the eccentric rotating blocks 508 on both sides rotate synchronously. The eccentric part of the eccentric rotating block 508 moves into the anti-slip groove 510 and pushes the anti-slip positioning block 509 to move towards the turntable body 6 until the anti-slip positioning block 509 presses against the turntable body 6, so as to prevent the turntable body 6 from continuing to move after the drive motor 301 is turned off due to inertia, thereby improving the accuracy of the rotation position of the turntable body 6.

[0049] In summary, this high-precision servo heavy-duty turntable device, by incorporating a thrust self-aligning roller bearing 2, can automatically adjust its center position to a certain extent, compensating for the misalignment or installation error of the turntable body 6. It also possesses high load-bearing capacity, capable of withstanding large axial loads, thus improving operational stability and reliability. The turntable 305 drives the driven shaft 306 to rotate, which in turn drives the output shaft of the encoder 302 to rotate synchronously, recording the rotational data of the drive shaft 304. Based on parameters set in the system, the start and stop of the drive motor 301 are controlled, thereby controlling the start and stop of the turntable body 6. This allows for precise angular positioning of the turntable body 6, improving control accuracy, and also enables real-time monitoring of the turntable body 6's motion status. The drive mechanism 3 and the reduction mechanism 4 work together to reduce the speed and increase the torque, giving the turntable body 6 greater driving force and providing precise speed and torque control. This helps to achieve accurate positioning and motion control of the turntable body 6. By electrically connecting the positioning motor 502, drive motor 301, and encoder 302 to the control terminal of the equipment, the control terminal coordinates the work of each mechanism. When the parameters detected by the drive motor 301 are consistent with the system preset parameters, the positioning motor 502 starts. The positioning motor drives the anti-slip positioning block to move towards the turntable body 6 until it is pressed against the turntable body 6. This prevents the turntable body 6 from continuing to move due to inertia after the drive motor 301 is turned off, thereby improving the accuracy of the rotation position of the turntable body 6.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision servo heavy-duty turntable device, comprising a fixed platform (1), characterized in that: A thrust self-aligning roller bearing (2) is fixedly installed on the fixed platform (1). A turntable body (6) is fixedly installed inside the thrust self-aligning roller bearing (2) through an installation sleeve (7). A fixed frame (9) is fixedly installed on the lower surface of the fixed platform (1). A drive mechanism (3) is provided on the fixed frame (9). A deceleration mechanism (4) is provided inside the fixed frame (9). The middle part of the deceleration mechanism (4) is rotatably connected to the middle part of the lower surface of the turntable body (6) through a mounting seat (8). A positioning mechanism (5) is provided on the outer side of the lower end of the turntable body (6). The positioning mechanism (5) is fixedly connected to the inner side of the upper end of the fixed frame (9). The positioning mechanism (5) includes a first fixing block (501), a positioning motor (502), a second fixing block (503), and a guide rail (504). The first fixing block (501), the second fixing block (503), and the guide rail (504) are fixedly installed on the inner side wall of the upper end of the fixing frame (9). The positioning motor (502) is fixedly installed on the first fixing block (501). The output end of the positioning motor (502) is fixedly connected to a third rotating shaft (506). The upper and lower ends of the third rotating shaft (506) are respectively fixedly fitted with a drive gear (507) and an eccentric rotating block (508). The guide rail (504) is internally... A transmission gear ring (505) is rotatably connected, and the transmission gear ring (505) meshes with the drive gear (507). A guide block (512) is fixedly connected to the upper surface of the second fixed block (503). An anti-slip positioning block (509) is provided on one side of the eccentric rotating block (508). An active groove (511) is opened at the bottom of the anti-slip positioning block (509). The active groove (511) is slidably connected to the guide block (512). An anti-slip groove (510) is opened on the side of the anti-slip positioning block (509) near the eccentric rotating block (508). The eccentric rotating block (508) abuts against the inner wall of the anti-slip groove (510).

2. The high-precision servo heavy-duty turntable device as described in claim 1, characterized in that: The thrust self-aligning roller bearing (2) includes an inner ring (201), balls (203) and an outer ring (204). The outer ring (204) is fixedly installed inside the fixed platform (1). The balls (203) are tumbling between the inner ring (201) and the outer ring (204). The upper surface of the inner ring (201) is provided with several mounting grooves (202). The upper end of the mounting sleeve (7) is interference-fitted with the mounting groove (202). The lower end of the mounting sleeve (7) is fixedly connected to the inner wall of the inner ring (201). The turntable body (6) is fixedly installed inside the mounting sleeve (7).

3. The high-precision servo heavy-duty turntable device as described in claim 1, characterized in that: The deceleration mechanism (4) includes an internal gear ring (401), a sun gear (402) and three planetary gears (403). A connecting ring (406) is fixedly connected to the outer circumferential surface of the internal gear ring (401). The connecting ring (406) is fixedly sleeved on the bottom outer circumferential surface of the turntable body (6). The three planetary gears (403) are circumferentially arranged between the internal gear ring (401) and the sun gear (402) and mesh with the internal gear ring (401) and the sun gear (402). A bushing (405) is fixedly connected inside the sun gear (402). The bushing (405) is rotatably connected inside the mounting base (8).

4. The high-precision servo heavy-duty turntable device as described in claim 3, characterized in that: Each of the three planetary gears (403) is fixedly connected to a second rotating shaft (404), and the bottom of each of the three second rotating shafts (404) is rotatably connected to a base (407), which is fixedly installed on the inner wall of the lower end of the fixing frame (9).

5. The high-precision servo heavy-duty turntable device as described in claim 3, characterized in that: The drive mechanism (3) includes a drive motor (301), an encoder (302) and a fixing plate (303). The fixing plate (303) is fixedly connected to the lower surface of one end of the fixing frame (9). The drive motor (301) and the encoder (302) are both fixedly installed on one side of the fixing plate (303). The output end of the drive motor (301) is fixedly connected to a drive shaft (304), and the output end of the encoder (302) is fixedly installed with a driven shaft (306).

6. The high-precision servo heavy-duty turntable device as described in claim 5, characterized in that: The drive shaft (304) rotates through the fixed frame (9). A turntable (305) is fixedly sleeved on one end of the drive shaft (304) near the drive motor (301). The turntable (305) is rotatably connected to the inner wall of the driven shaft (306). A worm gear (308) is fixedly connected to one end of the drive shaft (304) away from the drive motor (301). The connection between the worm gear (308) and the drive shaft (304) is rotatably installed in the fixed seat (307). The fixed seat (307) is fixedly installed on the lower inner wall of the fixed frame (9).

7. A high-precision servo heavy-duty turntable device as described in claim 6, characterized in that: The worm (308) is provided with a worm wheel (309) and a first rotating shaft (310) on one side. The bottom of the first rotating shaft (310) is rotatably mounted on the inner wall of the fixed frame (9). The top of the first rotating shaft (310) is fixedly sleeved inside the bushing (405). The worm wheel (309) is fixedly sleeved in the middle of the first rotating shaft (310). The worm wheel (309) is meshed with the worm (308).

8. The method of using a high-precision servo heavy-duty turntable device according to claim 7, characterized in that: Includes the following steps: S1: Start the drive motor (301), drive the drive shaft (304) and worm (308) to rotate through the drive motor (301), drive the worm wheel (309) and the first rotating shaft (310) to rotate through the worm (308), drive the turntable (305) to rotate while the drive shaft (304) rotates, and drive the driven shaft (306) to rotate through the turntable (305). During the rotation of the driven shaft (306), drive the output shaft of the encoder (302) to rotate synchronously, realize the recording of the rotation data of the drive shaft (304), control the start and stop of the drive motor (301) according to the parameters set in the system, thereby realizing the control of the start and stop of the turntable body (6), accurately the angle position of the turntable body (6), improve the control accuracy and monitor the motion status of the turntable body (6) in real time; S2: The first rotating shaft (310) drives the sun gear (402) to rotate, and the sun gear (402) drives the planet gear (403) to rotate. The planet gear (403) drives the second rotating shaft (404) to rotate on the base (407) and mesh with the internal gear ring (401), thereby driving the connecting ring (406) and the turntable body (6) to rotate at a low speed. This facilitates reducing the rotation speed of the turntable body (6) and increasing the torque, giving the turntable body (6) greater driving force, providing precise speed and torque control, and helping to achieve precise positioning and motion control of the turntable body (6). S3: When the parameters detected by the drive motor (301) are consistent with the system preset parameters, the positioning motor (502) starts and drives the third rotating shaft (506) to rotate. The third rotating shaft (506) drives the drive gear (507) and the eccentric rotating block (508) to rotate synchronously. The drive gear (507) drives the transmission gear ring (505) to rotate, so that the eccentric rotating blocks (508) on both sides rotate synchronously. The eccentric part of the eccentric rotating block (508) moves into the anti-slip groove (510) and pushes the anti-slip positioning block (509) to move towards the turntable body (6) until the anti-slip positioning block (509) presses against the turntable body (6) to prevent the turntable body (6) from continuing to move after the drive motor (301) is turned off due to inertia, thereby improving the accuracy of the rotation position of the turntable body (6).

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