A turntable structure supported by air floating bearings

Abstract

The application discloses a kind of air bearing supported turntable structure of air float turntable technical field, including support seat, motor stator and motor rotor are installed in the inside of support seat, the center of motor stator is connected with the axle, the top of axle is equipped with bearing turntable;Brake frame is installed at the top of support seat, brake plate is connected with the inside of brake frame by elastic expansion piece, the top of brake plate is equipped with brake block compatible with the bottom brake groove of bearing turntable, the present application solves the existing air float turntable in the power of clamping control basically comes from air pressure, if air float turntable internal air pressure is insufficient or no air pressure, clamping effect can be greatly reduced, leading to air float turntable can continue to rotate, the precision of control is poor, and air float turntable is used before, when air pressure is not sufficient friction is greater, it can still rotate, easy to bring certain wear to air float bearing, affect component precision, not conducive to people use problem.

Description

Technical Field

[0001] This invention relates to the field of air-bearing turntable technology, specifically a turntable structure supported by air-bearing bearings. Background Technology

[0002] An air-floating turntable suspends a rotating platform in the air, allowing it to rotate stably and with high precision. This suspension effect is achieved by introducing compressed air, with minimal pressure relief gaps to ensure the platform's levitation. This structure offers advantages such as high speed, high precision, no friction, no wear, no need for lubrication, excellent speed control performance, and zero noise.

[0003] Existing air-bearing turntables primarily rely on air pressure for clamping control. If the internal air pressure is insufficient or nonexistent, the clamping effect is significantly reduced, allowing the turntable to continue rotating with poor control precision. Furthermore, before use, the turntable can still rotate even with insufficient air pressure and high friction, easily causing wear on the air bearings, affecting component precision, and hindering usability. Therefore, those skilled in the art have provided a turntable structure supported by air bearings to address the problems mentioned in the background section. Summary of the Invention

[0004] The purpose of this invention is to provide a turntable structure supported by an air bearing to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a turntable structure supported by an air bearing, comprising a support base, wherein a motor stator and a motor rotor are installed inside the support base, a rotating shaft is connected to the center of the motor stator, and a bearing turntable is provided at the top end of the rotating shaft;

[0006] A brake frame is installed on the top of the support base. A brake plate is connected inside the brake frame through an elastic telescopic member. A brake block is provided on the top of the brake plate to match the brake groove at the bottom of the bearing turntable.

[0007] An upper floating plate and a lower floating plate are detachably installed between the top of the support base and the bottom of the bearing turntable. The brake block moves through the upper floating plate and the lower floating plate. A ventilation assembly is installed between the upper floating plate and the lower floating plate. An air passage is provided between the upper floating plate and the lower floating plate, which extends into the bearing turntable and the brake frame.

[0008] Preferably, the elastic telescopic component includes multiple sets of telescopic springs equidistantly installed in the brake frame, with a lifting ring connected to the top of each telescopic spring, and the top of the lifting ring connected to the bottom of the brake plate.

[0009] Preferably, the inner ring at the top of the brake frame is provided with a limiting groove for the lifting ring to move up and down.

[0010] Preferably, a positioning rod is welded to the bottom of the lifting ring, and a positioning tube is installed at the bottom of the inner cavity of the brake frame at the center of each set of telescopic springs, and the positioning rod can slide up and down inside the positioning tube.

[0011] Preferably, the bottom of the upper floating plate and the top of the lower floating plate are both provided with a first channel that can be spliced ​​together. The interior of the upper floating plate is provided with a first upper air hole that connects the bearing turntable and the first channel. The interior of the lower floating plate is provided with a first lower air hole that connects the brake frame and the first channel.

[0012] Preferably, the inner ring of the first channel on the upper and lower float plates is connected to a second channel through a perforation, the upper float plate has a second upper air hole connected to the second channel, and the lower float plate has a second lower air hole connected to the second channel.

[0013] Preferably, the ventilation assembly includes an air inlet end disposed between the upper float plate and the lower float plate, the air inlet end is connected to an air pipe extending into the interior of the first channel, a sealing ring is connected to the air pipe, and a sealing groove matching the sealing ring is provided at the bottom of the upper float plate and the top of the lower float plate.

[0014] Preferably, the bottom of the lower float plate is provided with a slot for the brake plate to move, and the top of the upper float plate is provided with a venting groove. Both the slot and the venting groove are provided with a slide for the brake block to move.

[0015] Preferably, the upper float plate, the lower float plate, and the outer ring of the brake frame are connected by multiple sets of fixing screws.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, an externally connected air pump pressurizes the interior of the brake frame through an air passage. The pressurization inside the air passage can drive the brake plate, the elastic telescopic component to extend and retract, and the brake block to move. This allows the air bearing turntable to reach a certain air-float state before rotating, thereby effectively reducing the wear of the components.

[0018] 2. In this invention, when the air pressure inside the brake frame decreases, the brake block can be driven to brake the bearing turntable by the reset of the elastic telescopic component, which can effectively improve the braking efficiency and thus improve the rotation accuracy of the air-bearing turntable.

[0019] 3. In this invention, by setting a sealing ring on the air pipe, and opening a sealing groove at the bottom of the upper float plate and the top of the lower float plate to match the sealing ring, the sealing performance between the upper float plate and the lower float plate can be improved by adding the sealing ring inside the sealing groove between the upper float plate and the lower float plate.

[0020] 4. In this invention, the turntable structure supported by the air bearing has a simple overall structure, is easy to manufacture and assemble, and has flexible component settings, which facilitates maintenance. The overall structure is reasonably set, the equipment operates stably, and it is easy to extend the service life of the equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a first exploded view of the overall structure of the present invention;

[0023] Figure 3 This is a second exploded view of the overall structure of the present invention;

[0024] Figure 4 This is a first schematic diagram of the floating plate structure of the present invention;

[0025] Figure 5 This is a second schematic diagram of the floating plate structure of the present invention;

[0026] Figure 6 This is a second schematic diagram of the brake frame and support structure of the present invention;

[0027] Figure 7 This is a cross-sectional view of the overall structure of the present invention;

[0028] Figure 8 For the present invention Figure 7 A magnified view of A in the middle.

[0029] In the diagram: 1. Support base; 2. Motor stator; 3. Motor rotor; 4. Shaft; 5. Bearing turntable; 6. Brake frame; 7. Brake plate; 8. Brake groove; 9. Brake block; 10. Upper float plate; 11. Lower float plate; 12. Telescopic spring; 13. Lifting ring; 14. Limiting groove; 15. Positioning rod; 16. Positioning tube; 17. First channel; 18. First upper air hole; 19. First lower air hole; 20. Perforation; 21. Second channel; 22. Second upper air hole; 23. Second lower air hole; 24. Air inlet end; 25. Air pipe; 26. Sealing ring; 27. Sealing groove; 28. Slot; 29. ​​Ventilation groove; 30. Slide rail; 31. Fixing screw. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figures 1 to 8In this embodiment of the invention, a turntable structure supported by an air bearing includes a support base 1. A motor stator 2 and a motor rotor 3 are installed inside the support base 1. A rotating shaft 4 is connected to the center of the motor stator 2. A bearing turntable 5 is provided at the top of the rotating shaft 4. A brake frame 6 is installed on the top of the support base 1. A brake plate 7 is connected inside the brake frame 6 through an elastic telescopic member. A brake block 9 is provided on the top of the brake plate 7, which is adapted to the brake groove 8 at the bottom of the bearing turntable 5. An upper floating plate 10 and a lower floating plate 11 are detachably installed between the top of the support base 1 and the bottom of the bearing turntable 5. The brake block 9 moves through the upper floating plate 10 and the lower floating plate 11. A ventilation assembly is installed between the upper floating plate 10 and the lower floating plate 11. An air passage is provided between the upper floating plate 10 and the lower floating plate 11, which extends into the bearing turntable 5 and the brake frame 6.

[0032] In use, the ventilation assembly connects to the air pump. Starting the motor stator 2 and rotor 3 inside the support base 1 drives the rotating shaft 4 to rotate. The rotating shaft 4 then drives the bearing turntable 5 to rotate. The air pump vents air into the bearing turntable 5, keeping it in an air-floating state during rotation. This air-floating bearing turntable 5 drives the component placed on top of it to rotate, improving rotational accuracy. An air passage is provided between the upper floating plate 10 and the lower floating plate 11 for ventilation. Before the bearing turntable 5 rotates, the air pump pressurizes the brake frame 6. The pressurization of the brake plate 7 can drive the brake plate 7 to move inside the brake frame 6. The brake plate 7 drives the elastic telescopic component to extend and retract and the brake block 9 to move up and down. When the air pressure inside the brake frame 6 reaches the limit value, the brake block 9 disengages from the brake groove 8 at the bottom of the bearing turntable 5, which enables the air bearing turntable 5 to reach a certain air buoyancy state before rotating. When the air bearing turntable 5 needs to stop rotating, the air pressure inside the brake frame 6 can drop, which will cause the elastic telescopic component to reset and drive the brake block 9 to brake the bearing turntable 5, which can effectively improve the braking efficiency.

[0033] In one embodiment, the elastic telescopic component includes multiple sets of telescopic springs 12 circumferentially and equidistantly installed inside the brake frame 6. The top of the telescopic spring 12 is connected to a lifting ring 13, and the top of the lifting ring 13 is connected to the bottom of the brake plate 7. By using a venting component to pressurize the top of the lifting ring 13, the lifting ring 13 can drive the telescopic spring 12 to extend and retract. The lifting ring 13 drives the brake plate 7 and brake block 9 at the top to move. After the telescopic spring 12 is retracted by the external force, it can quickly drive the brake block 9 to reset and brake using its own elasticity.

[0034] The inner ring at the top of the brake frame 6 is provided with a limiting groove 14 for the lifting ring 13 to move up and down. This groove restricts the range of movement of the lifting ring 13 and improves the sealing of the outer ring of the lifting ring 13. A positioning rod 15 is welded to the bottom of the lifting ring 13. A positioning tube 16 is installed at the bottom of the inner cavity of the brake frame 6 at the center of each set of telescopic springs 12. The positioning rod 15 can slide up and down inside the positioning tube 16. During the up and down movement of the lifting ring 13, the positioning rod 15 can move up and down inside the positioning tube 16, which can improve the stability of the lifting ring 13 and the telescopic spring 12 when they move.

[0035] In one embodiment, the bottom of the upper floating plate 10 and the top of the lower floating plate 11 are both provided with a first channel 17 that can be spliced ​​together. The interior of the upper floating plate 10 is provided with a first upper air hole 18 that connects the bearing turntable 5 and the first channel 17. The interior of the lower floating plate 11 is provided with a first lower air hole 19 that connects the brake frame 6 and the first channel 17. Furthermore, the inner ring of the first channel 17 on the upper floating plate 10 and the lower floating plate 11 is connected to a second channel 21 through a through hole 20. The interior of the upper floating plate 10 is provided with a second upper air hole 22 that connects to the second channel 21. The interior of the lower floating plate 11 is provided with a second lower air hole 23 that connects to the second channel 21.

[0036] During use, during the installation of the upper floating plate 10 and the lower floating plate 11, the first channels 17 on the upper floating plate 10 and the lower floating plate 11 are aligned. Air is supplied to the interior of the first channel 17 through the ventilation component. The first channel 17 pressurizes the interior of the bearing turntable 5 and the brake frame 6 through the first upper air hole 18 and the first lower air hole 19, so that the two reach a stable balance pressure. The second channel 21, the second upper air hole 22 and the second lower air hole 23 with an inner ring are connected through the perforation 20, so that the top of the bearing turntable 5 and the lifting ring 13 can be subjected to uniform pneumatic thrust, thereby improving the stability of the component operation.

[0037] The ventilation assembly includes an air inlet 24 disposed between the upper float plate 10 and the lower float plate 11. The air inlet 24 is connected to an air pipe 25 extending into the first channel 17. A sealing ring 26 is connected to the air pipe 25. A sealing groove 27 matching the sealing ring 26 is provided at the bottom of the upper float plate 10 and the top of the lower float plate 11. When installing the air pipe 25, the sealing ring 26 is added inside the sealing groove 27 between the upper float plate 10 and the lower float plate 11, which can improve the sealing performance between the upper float plate 10 and the lower float plate 11.

[0038] Based on the above embodiments, the bottom of the lower float plate 11 is provided with a slot 28 for the brake plate 7 to move, which can improve the sealing effect of the brake plate 7 when it is inside the slot 28, thereby improving the braking agility. The top of the upper float plate 10 is provided with a venting groove 29. The slot 28 and the venting groove 29 are both provided with slides 30 for the brake block 9 to move. The slides 30 inside the upper float plate 10 can be used as air passages. The venting groove 29 connecting multiple sets of slides 30 facilitates uniform ventilation of the bearing turntable 5. The upper float plate 10, the lower float plate 11 and the outer ring of the brake frame 6 are connected by multiple sets of fixing screws 31. The bottom end of the fixing screws 31 is threaded to the inside of the brake frame 6, which can facilitate the assembly between components.

[0039] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A turntable structure supported by an air bearing, comprising a support base (1), characterized in that: The support base (1) is equipped with a motor stator (2) and a motor rotor (3). The center of the motor stator (2) is connected to a rotating shaft (4), and the top of the rotating shaft (4) is provided with a bearing turntable (5). A brake frame (6) is installed on the top of the support base (1). The brake plate (7) is connected inside the brake frame (6) through an elastic telescopic member. The top of the brake plate (7) is provided with a brake block (9) that is compatible with the brake groove (8) at the bottom of the bearing turntable (5). An upper floating plate (10) and a lower floating plate (11) are detachably installed between the top of the support base (1) and the bottom of the bearing turntable (5). The brake block (9) moves through the upper floating plate (10) and the lower floating plate (11). A ventilation assembly is installed between the upper floating plate (10) and the lower floating plate (11). An air passage is provided between the upper floating plate (10) and the lower floating plate (11) to extend into the bearing turntable (5) and the brake frame (6).

2. The turntable structure supported by an air bearing according to claim 1, characterized in that: The elastic telescopic component includes multiple sets of telescopic springs (12) installed circumferentially and equidistantly inside the brake frame (6). The top of the telescopic spring (12) is connected to a lifting ring (13), and the top of the lifting ring (13) is connected to the bottom of the brake plate (7).

3. The turntable structure supported by an air bearing according to claim 2, characterized in that: The inner ring at the top of the brake frame (6) is provided with a limiting groove (14) for the lifting ring (13) to move up and down.

4. The turntable structure supported by an air bearing according to claim 3, characterized in that: The bottom of the lifting ring (13) is welded with a positioning rod (15), and the bottom of the inner cavity of the brake frame (6) is equipped with a positioning tube (16) at the center of each set of telescopic springs (12). The positioning rod (15) can slide up and down inside the positioning tube (16).

5. A turntable structure supported by an air bearing according to any one of claims 1-4, characterized in that: The bottom of the upper floating plate (10) and the top of the lower floating plate (11) are provided with a first channel (17) that can be spliced. The interior of the upper floating plate (10) is provided with a first upper air hole (18) that connects the bearing turntable (5) and the first channel (17). The interior of the lower floating plate (11) is provided with a first lower air hole (19) that connects the brake frame (6) and the first channel (17).

6. The turntable structure supported by an air bearing according to claim 5, characterized in that: The inner ring of the first channel (17) on the upper float plate (10) and the lower float plate (11) is connected to the second channel (21) through the perforation (20). The upper float plate (10) is provided with a second upper air hole (22) that communicates with the second channel (21), and the lower float plate (11) is provided with a second lower air hole (23) that communicates with the second channel (21).

7. The turntable structure supported by an air bearing according to claim 6, characterized in that: The ventilation assembly includes an air inlet (24) disposed between the upper float (10) and the lower float (11). The air inlet (24) is connected to an air pipe (25) extending into the first channel (17). A sealing ring (26) is connected to the air pipe (25). A sealing groove (27) matching the sealing ring (26) is provided at the bottom of the upper float (10) and the top of the lower float (11).

8. The turntable structure supported by an air bearing according to claim 5, characterized in that: The bottom of the lower float plate (11) is provided with a slot (28) for the brake plate (7) to move, and the top of the upper float plate (10) is provided with a venting groove (29). The slot (28) and the venting groove (29) are both provided with a slide (30) for the brake block (9) to move.

9. The turntable structure supported by an air bearing according to claim 1, characterized in that: The outer rings of the upper floating plate (10), the lower floating plate (11), and the brake frame (6) are connected by multiple sets of fixing screws (31).

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