High-precision single-shaft turntable with large-diameter hollow shaft hole

Abstract

The high-precision single-shaft rotary table with the large-diameter hollow shaft hole comprises a mechanical table body, a double-tooth-piece assembly and two driving assemblies, the double-tooth-piece assembly and the two driving assemblies are arranged in the mechanical table body, and the mechanical table body comprises a table top, a rotary supporting gear and a base; the double-tooth-piece assembly and the two driving assemblies are installed on the base and distributed along the outer edge of a hollow shaft hole formed in the middle of the base, and the double-tooth-piece assembly is meshed with the rotary supporting gear and comprises a first tooth piece, a second tooth piece, a tooth piece shaft, a spring and an encoder assembly; according to the high-precision single-shaft rotary table with the large-diameter hollow shaft hole, the large-diameter hollow shaft hole can meet the test requirement, the encoder assembly is installed on the double-tooth-piece assembly to accurately collect the position of a rotary terminal, the encoder selection difficulty and cost are reduced through the structural design, and the detection accuracy is improved. And meanwhile, the two driving assemblies are arranged on the base, the two driving assemblies are adopted for eliminating gaps, the structural rigidity can be improved, and the position precision is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of test turntables, in particular to a high-precision single-axis turntable with a large-diameter hollow shaft hole. Background Art

[0002] There are three main types of existing single-axis turntable structures: torque motor direct drive, worm gear + servo motor + reducer, gear pair + servo motor + reducer. However, considering the need for a test turntable with a larger hollow shaft hole, most of the current turntable structures still have the following defects: (1) If the purpose is to test a hollow shaft hole with a larger diameter, the center hole of the torque motor and worm gear must be larger than the hollow shaft hole. However, larger motors and worm gears significantly increase production costs. (2) In existing test turntables, the encoder is generally installed on the rotary terminal. However, the larger diameter of the hollow shaft hole greatly increases the cost of installing the encoder on the rotary terminal. When the shaft hole size exceeds 600mm, the encoders on the market cannot meet the requirements.

[0003] Therefore, the present application provides a high-precision single-axis turntable with a large-diameter hollow shaft hole, which does not require the high cost of producing larger motors and worm gears, and can be used for testing larger diameter hollow shaft holes while meeting the requirements of easy and low-cost installation of the encoder. Summary of the invention

[0004] Purpose of the invention: To provide a high-precision single-axis turntable with a large-diameter hollow shaft hole, which does not require the production of larger motors and worm gears at high costs, and can also be used for testing hollow shaft holes with larger diameters while meeting the requirements of easy and low-cost installation of encoders.

[0005] Technical solution:

[0006] A high-precision single-axis turntable with a large-diameter hollow shaft hole, comprising a mechanical table body, a double-toothed plate assembly arranged in the mechanical table body, and two sets of driving assemblies, wherein the mechanical table body comprises a table top, a slewing support gear and a base, wherein the table top is connected to the slewing support gear, the slewing support gear is rotatably arranged on the base, and the two sets of driving assemblies are symmetrically arranged on both sides of the slewing support gear for driving the slewing support gear to rotate; The double-toothed plate assembly and the two groups of driving assemblies are all mounted on the base and are distributed along the outer edge of the hollow shaft hole opened in the middle of the base, and the double-toothed plate assembly is meshed with the rotary supporting gear. The double-toothed plate assembly comprises a first toothed plate, a second toothed plate, a toothed plate shaft, a spring and an encoder assembly, and the toothed plate shaft is rotatably arranged on the base, the first toothed plate is fixedly sleeved on the toothed plate shaft, the second toothed plate is movably sleeved on the toothed plate shaft and is located parallel to the first toothed plate, the encoder assembly is connected to the toothed plate shaft, the toothed blocks corresponding to the upper and lower parts of the first toothed plate and the second toothed plate overlap and are located in the same tooth groove of the rotary supporting gear, one of the two opposite groove surfaces of the same tooth groove is in contact with one side of the tooth block of the first toothed plate, and the other groove surface is in contact with one side of the tooth block of the second toothed plate, and one side of the tooth block of the first toothed plate is opposite to one side of the tooth block of the second toothed plate; The spring is located between the first tooth plate and the second tooth plate, one end of the spring is connected to the first connection point of the first tooth plate, and the other end is fixed to the second connection point of the second tooth plate, and the line between the first connection point and the second connection point is perpendicular to the axis of the tooth plate shaft.

[0007] In a further embodiment, the rotary support gear includes a support rotor and a support stator, the support rotor is connected to the table top by screws, and the support stator is fixed to the base by screws.

[0008] In a further embodiment, the table top and the middle of the slewing support gear are both provided with through holes connected to the hollow shaft hole, the two through holes and the center of the hollow shaft hole are on the same vertical line, and the empty groove is provided with an antifreeze liquid supply component; The antifreeze liquid supply component includes a water hinge, which is installed on a hinge bracket and a hinge adapter plate. The hinge bracket is fixed to the base by screws, and the hinge adapter plate is connected to the table top by screws.

[0009] In a further embodiment, a limit assembly is further provided between the base and the table top, the limit assembly comprising a mechanical limit block, a mechanical stop block, a rubber block and a sensing sheet, the mechanical limit block is provided on the base, and the mechanical stop block and the sensing sheet are both provided on a side of the table top facing the base; The rubber block is mounted on the mechanical stopper by screws, the induction sheet is electrically connected to the induction switch, and the induction switch is mounted on the base by a switch bracket.

[0010] In a further embodiment, the gear shaft is installed on a bearing seat, the bearing seat is arranged on the base, two inner bearings are installed in the bearing seat, a first retaining ring is provided between the two inner bearings, the outer rings of the two inner bearings are abutted against the inner wall of the bearing seat through the first retaining ring, and a second retaining ring is provided on the gear shaft, and the second retaining ring is fixed to the inner bearings through a locking nut.

[0011] In a further embodiment, the encoder assembly includes an encoder body and a connecting seat, the encoder body includes an encoder rotor and an encoder stator, the connecting seat is connected below the bearing seat and presses the outer ring of the inner bearing, the connecting seat is connected to the encoder stator, and the encoder rotor is radially fixed to the gear shaft by screws.

[0012] In a further embodiment, a shaft retaining ring is sleeved and fixed on the gear shaft, and the shaft retaining ring is used to limit the axial position of the second gear.

[0013] In a further embodiment, the driving assembly includes a servo motor, a reducer and a pinion gear, the servo motor is connected to the pinion gear via the reducer, and the pinion gear is meshingly connected to the slewing support gear.

[0014] In a further embodiment, a control system hardware is also provided in the base, and the control system hardware includes a display control screen, a warning light, a local control box, a main control box, a control box, a drive control box and a bottom box, the bottom box is located in the base, the bottom box is connected to the main control box through an aviation plug, the control box and the drive control box are provided in the bottom box, the main control box is connected to the local control box and the warning light through a cable, the local control box and the warning light are installed in an operating room, and the display screen and the main control box connected through a DVI cable and a USB cable are provided on the operating table in the operating room.

[0015] Beneficial effects of the present invention: the hollow shaft hole with a larger diameter of the present invention can meet the testing requirements. Compared with the traditional encoder directly installed on the rotary terminal to collect the setting of the rotary terminal position, the present invention adopts a structure in which the encoder assembly is installed on the double-tooth plate assembly to accurately collect the rotary terminal position. The difficulty and cost of encoder selection are reduced through structural design. At the same time, two groups of drive assemblies are provided on the base. The two groups of drive assemblies are used to eliminate the gap, which can improve the structural rigidity and ensure the positioning accuracy. The drive assembly and the double-tooth plate assembly are both engaged with the setting of the rotary support gear to ensure that the rotary support gear always receives the tensioning force. The encoder assembly installed on the double-tooth plate assembly can rotate at a certain reduction ratio without any gap, further ensuring the positioning accuracy of the turntable. The single-axis turntable table is 2m and adopts a splicing structure to reduce the production cost of structural parts. The drive assembly is connected to the table body with a connecting plate, which has high maintainability and further reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the mechanical platform of the present invention when viewed from above.

[0017] Figure 2 It is a front sectional structural schematic diagram of the mechanical platform of the present invention.

[0018] Figure 3 It is a front cross-sectional structural schematic diagram of the double-tooth plate assembly of the present invention.

[0019] Figure 4 It is a schematic diagram of the partial structure of the double tooth plate meshing with the slewing support gear in a top view of the present invention. Figure 5 It is a front structural schematic diagram of the driving component of the present invention.

[0020] Figure 6 It is a schematic diagram of the front structure of the mechanical platform of the present invention.

[0021] Figure 7 It is a front sectional structural schematic diagram of the meshing of the double-tooth plate assembly and the slewing support gear of the present invention.

[0022] Figure 8 It is a schematic diagram of the main interface structure of the turntable of the present invention.

[0023] The accompanying drawings are marked as: mechanical platform body 1, table top 11, hinge adapter plate 12, slewing support gear 13, base 14, hinge bracket 15, water hinge 16, limit assembly 17, mechanical limit block 171, mechanical stop block 172, rubber block 173, induction sheet 174, induction switch 175, lifting eye screw 18, double gear assembly 2, first gear 21, second gear 22, gear shaft 23, shaft retaining ring 231, shaft retaining ring 231, bearing seat 24, inner bearing 241, connecting seat 25, first retaining ring 26, second retaining ring 27, encoder body 28, spring 29, drive assembly 3, servo motor 31, reducer 32, pinion 33, connecting plate 34, control system hardware 4. DETAILED DESCRIPTION

[0024] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0026] Reference Figure 1-8, is a high-precision single-axis turntable with a large-diameter hollow shaft hole disclosed in the present invention, comprising a mechanical table body 1, a double-toothed plate assembly 2 and two groups of driving assemblies 3 arranged in the mechanical table body 1, the mechanical table body 1 comprises a table top 11, a rotary support gear 13 and a base 14, the table top 11 is connected to the rotary support gear 13, the rotary support gear 13 is rotatably arranged on the base 14, and the two groups of driving assemblies 3 are symmetrically arranged on both sides of the rotary support gear 13 for driving the rotary support gear 13 to rotate; the double-toothed plate assembly 2 and the two groups of driving assemblies 3 are both installed on the base 14, and are distributed along the outer edge of the hollow shaft hole opened in the middle of the base 14, the double-toothed plate assembly 2 is meshed with the rotary support gear 13, and the double-toothed plate assembly 2 comprises a first toothed plate 2 1. A second tooth piece 22, a tooth piece shaft 23, a spring 29 and an encoder assembly, wherein the tooth piece shaft 23 is rotatably arranged on the base 14, the first tooth piece 21 is fixedly sleeved on the tooth piece shaft 23, the second tooth piece 22 is movably sleeved on the tooth piece shaft 23 and is located parallel to the first tooth piece 21, the encoder assembly is connected to the tooth piece shaft 23, the upper and lower corresponding tooth blocks of the first tooth piece 21 and the second tooth piece 22 partially overlap and are located in the same tooth groove of the slewing support gear 13, one of the two opposite groove surfaces of the same tooth groove is in contact with one side of the tooth block of the first tooth piece 21, and the other groove surface is in contact with one side of the tooth block of the second tooth piece 22, one side of the tooth block of the first tooth piece 21 is opposite to one side of the tooth block of the second tooth piece 22, as shown in FIG. Figure 4As shown in the figure, the solid line position is the first tooth piece 21, and the dotted line position is the second tooth piece 22. When the first tooth piece 21 and the second tooth piece 22 of the same size are completely overlapped, the spring 29 is in a compressed or pulled apart state. When the upper and lower corresponding tooth blocks of the completely overlapping first tooth piece 21 and the second tooth piece 22 enter the same tooth groove, one side of the tooth blocks of the first tooth piece 21 and the second tooth piece 22 on the same side are both in contact with a groove surface of the tooth groove. As the spring 29 is reset, the second tooth piece 22 is bounced open or pulled, so that the two tooth pieces in the completely overlapping state are transformed into a partially overlapping state. At this time, the one side of the second tooth piece 22 facing away from the first tooth piece 21 is in contact with the other opposite surface of the tooth groove under the action of the spring 29, completing the tensioning operation of the two tooth pieces and the slewing support gear 13. The second tooth piece 22 driven by the elastic potential energy of the reset of the spring 29 rotates along the axis of the gear shaft 23. The second tooth piece 22 on the gear shaft 23 The rotation angle range is 0-1°; the spring 29 is located between the first tooth plate 21 and the second tooth plate 22, one end of the spring 29 is connected to the first connection point of the first tooth plate 21, and the other end is fixed to the second connection point of the second tooth plate 22, the line between the first connection point and the second connection point is perpendicular to the axis of the tooth plate shaft 23, and the line between the first connection point and the second connection point is consistent with the tangent direction of the tooth plate. Due to the height difference between the second tooth plate 22 and the first tooth plate 21, the line between the two connection points is not completely horizontal with the tangent of the tooth plate. Furthermore, placement grooves are provided on the opposite sides of the first tooth plate 21 and the second tooth plate 22, and the first connection point and the second connection point are respectively located in the two placement grooves. The setting of the placement grooves enables the spring 29 set at a certain inclination angle to be as parallel to the tangent as possible, and to be as close to perpendicular to the axis of the tooth plate shaft 23 as possible.

[0027] The slewing support gear 13 includes a support rotor and a support stator, the support rotor is connected to the table 11 by screws, and the support stator is fixed to the base 14 by screws. The slewing support gear 13 adopts a special bearing for a turntable, which can withstand comprehensive loads such as axial, radial and overturning moments. It is a precision bearing that integrates support, rotation, transmission, and fixation functions. The table 11 is made of aluminum alloy. The table 11 ensures that the flatness after fine processing is not greater than 0.1mm. 60 M12 threaded holes are arranged on the table 11 for connection of load products, and 4 evenly distributed lifting eye screws 18 are arranged for overall lifting. The base 14 is provided with 18 M12 threaded holes and 2 pin holes, and the 2 pin holes are used for positioning to ensure the accurate installation position of the turntable.

[0028] The table top 11 and the slewing support gear 13 are both provided with through holes in communication with the hollow shaft hole in the middle, the two through holes and the center of the hollow shaft hole are on the same vertical line, and an antifreeze liquid supply component is provided in the empty groove; the antifreeze liquid supply component includes a water hinge 16, and the water hinge 16 is installed on a hinge bracket 15 and a hinge adapter plate 12, the hinge bracket 15 is connected and fixed to the base 14 by screws, and the hinge adapter plate 12 is connected to the table top 11 by screws, the water hinge 16 includes a hinge stator and a hinge rotor, and the hinge stator and the hinge rotor are both connected and fixed to the hinge bracket 15, and the user can pass antifreeze liquid to the test piece above the table top 11 through the water hinge 16.

[0029] A limit assembly 17 is further provided between the base 14 and the table 11, and the limit assembly 17 includes a mechanical limit block 171, a mechanical stop block 172, a rubber block 173 and a sensing sheet 174. The mechanical limit block 171 is provided on the base 14, and the mechanical stop block 172 and the sensing sheet 174 are both provided on the side of the table 11 facing the base 14; the rubber block 173 is installed on the mechanical stop block 172 by screws, and the sensing sheet 174 is electrically connected to the sensing switch 175. The sensing switch 175 is electrically connected to the sensing switch 175. 75 is installed on the base 14 through the switch bracket, the rubber block 173 is installed on the mechanical stopper 172 through screws to play a buffering role, the sensor sheet 174 monitors the rotation information of the table top 11 and sends the monitored information to the controller, and the controller controls the drive component 3 to stop running. When the sensor sheet 174 fails, the turntable stops rotating through the collision between the mechanical limit block 172 and the mechanical stopper 172, double protection, the mechanical limit block 171 is installed at 14±65° of the base, and the sensor switch 175 is installed at 14±62° of the base.

[0030] The gear shaft 23 is installed on the bearing seat 24, and the bearing seat 24 is arranged on the base 14. Two inner bearings 241 are installed in the bearing seat 24, and a first retaining ring 26 is provided between the two inner bearings 241. The outer rings of the two inner bearings 241 are abutted against the inner wall of the bearing seat 24 through the first retaining ring 26. A second retaining ring 27 is provided on the gear shaft 23, and the second retaining ring 27 is fixed to the inner bearing 241 through a locking nut. The second retaining ring 27 enables the inner bearing 241 to achieve axial preload.

[0031] The encoder assembly includes an encoder body 28 and a connecting seat 25. The encoder body 28 includes an encoder rotor and an encoder stator. The connecting seat 25 is connected to the bottom of the bearing seat 24 and presses the outer ring of the inner bearing 241. The connecting seat 25 is connected to the encoder stator. The encoder rotor is radially fixedly connected to the gear shaft 23 by screws. The encoder collects the rotation information of the slewing support gear 13 as the gear shaft rotates.

[0032] A shaft retaining ring 231 is fixedly mounted on the tooth plate shaft 23, and the shaft retaining ring 231 is used to limit the axial position of the second tooth plate 22. After the second tooth plate 22 is movably mounted on the gear shaft, the shaft retaining ring 231 is fixed on the gear shaft and limits the second tooth plate 22. A certain movable space is left between the second tooth plate 22 and the gear shaft, so that the second tooth plate 22 can cooperate with the first tooth plate 21 under the action of the spring 29 to play a tensioning role in the tooth groove of the slewing support gear 13.

[0033] The driving assembly 3 includes a servo motor 31, a speed reducer 32 and a pinion 33. The servo motor 31 is connected to the pinion 33 through the speed reducer 32. The pinion 33 is meshed with the slewing support gear 13. Two groups of driving assemblies 3 are symmetrically arranged on both sides of the slewing support gear 13 at an angle of 180°. The two groups of driving assemblies 3 are installed on the base 14 through a connecting plate 34. The servo motor 31 rotates upon receiving a command, and the pinion 33 is driven to rotate through the speed reducer 32 to increase torque. The two pinions 33 are respectively fitted with two opposite tooth surfaces of the slewing support gear 13 to ensure that the slewing support gear 13 is always subjected to tensioning force, and the back-and-forth movement due to the existence of tooth gap can be avoided. The driving assembly 3 is connected to the base 14 through the connecting plate 34, which is convenient for users to repair and disassemble.

[0034] A control system hardware 4 is also provided in the base 14, and the control system hardware 4 includes a display screen, a warning light, a main control box, a main control box, a control box, a drive control box and a bottom box. The bottom box is located in the base 14, and the bottom box is connected to the main control box through an aviation plug. The control box and the drive control box are provided in the bottom box. The main control box is connected to the main control box and the warning light through a cable. The main control box and the warning light are installed in the operating room. The operating table in the operating room is provided with the display screen and the main control box connected through a DVI cable and a USB cable. The control system hardware 4 is arranged in the base 14 to facilitate the control operation of the electrical components, and at the same time, the turntable has a relatively high integration.

[0035] The implementation principle of the present invention is: when the control is in operation, the main control box of the equipment and the control box need to be connected to the power supply, and the user can power on and off the system through the main switch circuit breaker. The control box is mainly used for forward or reverse control of the turntable in the user's local control mode. The control box is equipped with a warning light, an "emergency stop" button, a power indicator light, a "local control / remote control" selection knob, and a "forward / reverse" selection knob. Rotate the "forward" button, the servo motor 31 rotates, and drives the pinion 33 to rotate through the reducer 32, and the pinion 33 further drives the slewing support gear 13 to rotate. The two pinions 33 are always in contact with the two opposite surfaces of the slewing support gear 13 to ensure that there is tension inside, thereby ensuring that there is no backlash when the turntable rotates. When the slewing support gear 13 rotates, since one side of the tooth blocks correspondingly arranged above and below the first tooth piece 21 and the second tooth piece 22 respectively fits two opposite surfaces in the same tooth groove of the slewing support gear 13, there is also a certain tension between the first tooth piece 21 and the second tooth piece 22 and the slewing support gear 13, and the encoder body 28 installed on the tooth piece shaft 23 can rotate at a certain reduction ratio without any gap, further ensuring the positioning accuracy of the turntable 5". When the turntable is working or not working, the user can pass antifreeze liquid to the measured part above the table 11 through the water hinge 16.

[0036] When operating remote control, the main control box and display screen of the device need to be connected to the power supply. The user can power on and off the system through the main switch circuit breaker. After waiting for the system to start, click the "Start" software button on the touch screen desktop to perform remote control. Its working principle is the same as this control, so it will not be repeated here. Further introduce the main interface function.

[0037] The main interface of the host computer software is as follows Figure 8As shown, it can be divided into four areas: 1, 2, 3, and 4. Area 1 displays the status of the driver, motor, and PLC, including the alarm indicator light of the turntable, the communication indicator light, the connection status of the PLC, the turntable angle, the turntable status, and the fault code; among them, the "alarm indicator light" is used to remind the operator whether the driver and motor are alarming, the "communication indicator light" is used to indicate whether the connection between the host computer and the PLC is successful, and the "system status" has two prompts: "PLC not connected" and "PLC connected". The "turntable angle" displays the current angle of the turntable, and the "turntable" has two prompts: "Run" and "Stop". When the turntable fails, the "fault code" will prompt the corresponding fault code. Area 2 displays the current angle, speed, upper limit, and lower limit of the turntable. Area 3 is divided into positioning control and stepping control areas, and the turntable can be positioned and stepped. In "positioning control", there are "speed setting" and "positioning angle" input boxes, which can set the speed and positioning angle of the turntable respectively. After setting the angle and speed, the turntable can be controlled by the "positioning" and "stop" buttons. When you click the "Zero" button, the turntable can be moved to the zero position. In "Step Control", there are "Step Angular Speed" and "Step Angle" input boxes, which can set the speed and step angle of the turntable stepping respectively. After setting the angle and speed, you can step the turntable through "Step Reverse" and "Step Forward", or stop the turntable by clicking the "Stop" button. In case of emergency, you can click the "Emergency Stop" button to stop the turntable immediately. In Zone 4, the drawing control displays the angle curve of the turntable in real time.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0039] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A high-precision single-axis turntable with a large-diameter hollow shaft hole, characterized in that: It comprises a mechanical platform, a double-toothed plate assembly arranged in the mechanical platform, and two sets of driving assemblies, wherein the mechanical platform comprises a table, a rotary support gear and a base, wherein the table is connected to the rotary support gear, the rotary support gear is rotatably arranged on the base, and the two sets of driving assemblies are symmetrically arranged on both sides of the rotary support gear for driving the rotary support gear to rotate; The double-toothed plate assembly and the two groups of driving assemblies are all mounted on the base and are distributed along the outer edge of the hollow shaft hole opened in the middle of the base, and the double-toothed plate assembly is meshed with the rotary supporting gear. The double-toothed plate assembly comprises a first toothed plate, a second toothed plate, a toothed plate shaft, a spring and an encoder assembly, and the toothed plate shaft is rotatably arranged on the base, the first toothed plate is fixedly sleeved on the toothed plate shaft, the second toothed plate is movably sleeved on the toothed plate shaft and is located parallel to the first toothed plate, the encoder assembly is connected to the toothed plate shaft, the toothed blocks corresponding to the upper and lower parts of the first toothed plate and the second toothed plate overlap and are located in the same tooth groove of the rotary supporting gear, one of the two opposite groove surfaces of the same tooth groove is in contact with one side of the tooth block of the first toothed plate, and the other groove surface is in contact with one side of the tooth block of the second toothed plate, and one side of the tooth block of the first toothed plate is opposite to one side of the tooth block of the second toothed plate; The spring is located between the first tooth plate and the second tooth plate, one end of the spring is connected to the first connection point of the first tooth plate, and the other end is fixed to the second connection point of the second tooth plate, and the line between the first connection point and the second connection point is perpendicular to the axis of the tooth plate shaft.

2. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: The rotary support gear comprises a support rotor and a support stator. The support rotor is connected to the table top by screws, and the support stator is connected and fixed to the base by screws.

3. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: The table top and the middle of the slewing support gear are both provided with through holes communicating with the hollow shaft hole, the two through holes and the center of the hollow shaft hole are on the same vertical line, and the empty groove is provided with an antifreeze liquid supply component; The antifreeze liquid supply component includes a water hinge, which is installed on a hinge bracket and a hinge adapter plate. The hinge bracket is fixed to the base by screws, and the hinge adapter plate is connected to the table top by screws.

4. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: A limit assembly is also provided between the base and the table top, and the limit assembly includes a mechanical limit block, a mechanical stop block, a rubber block and a sensing sheet. The mechanical limit block is provided on the base, and the mechanical stop block and the sensing sheet are both provided on a side of the table top facing the base. The rubber block is mounted on the mechanical stopper by means of screws, the induction sheet is electrically connected to the induction switch, and the induction switch is mounted on the base by means of a switch bracket.

5. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: The gear shaft is installed on the bearing seat, and the bearing seat is arranged on the base. Two inner bearings are installed in the bearing seat, and a first retaining ring is arranged between the two inner bearings. The outer rings of the two inner bearings are abutted against the inner wall of the bearing seat through the first retaining ring. A second retaining ring is arranged on the gear shaft, and the second retaining ring is fixed to the inner bearings through a locking nut.

6. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 5, characterized in that: The encoder assembly includes an encoder body and a connecting seat, the encoder body includes an encoder rotor and an encoder stator, the connecting seat is connected below the bearing seat and presses the outer ring of the inner bearing, the connecting seat is connected to the encoder stator, and the encoder rotor is radially fixedly connected to the gear shaft by screws.

7. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 5, characterized in that: A shaft retaining ring is sleeved and fixed on the gear shaft, and the shaft retaining ring is used to limit the axial position of the second gear.

8. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: The driving assembly comprises a servo motor, a reducer and a pinion gear. The servo motor is connected to the pinion gear via the reducer, and the pinion gear is meshedly connected to the slewing support gear.

9. The high-precision single-axis turntable with a large-diameter hollow shaft hole according to claim 1, characterized in that: The base is also provided with control system hardware, which includes a display control screen, a warning light, a main control box, a main control box, a control box, a drive control box and a bottom box. The bottom box is located in the base, and the bottom box is connected to the main control box through an aviation plug. The control box and the drive control box are arranged in the bottom box. The main control box is connected to the main control box and the warning light through a cable. The main control box and the warning light are installed in an operating room. The display screen and the main control box connected through a DVI cable and a USB cable are arranged on the operating table in the operating room.

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