A high-rigidity direct-drive horizontal turntable

Abstract

The utility model relates to the technical field of turntables, and discloses a high-rigidity direct-drive horizontal turntable. The high-rigidity direct-drive horizontal turntable comprises: an outer shell, an inner shell is fixedly installed below the outer shell, gas path 1 and gas path 2 are arranged inside the inner shell, an air intake pipe is fixedly installed below the inner shell, and a bottom cover is fixedly installed inside the inner shell. When gas path 2 is ventilated and gas path 1 is not ventilated, the gas generates an upward thrust, and the upper piston and the lower piston move upward as a whole, further compressing the bow-shaped deformation part on the basis of the spring elastic force. The inner diameter of the bow-shaped deformation part becomes smaller under the action of pressure, and the inner wall of the bow-shaped deformation part will contact the rotating shaft, and the relative pressure between the inner wall of the bow-shaped deformation part and the rotating shaft will increase under the influence of air pressure, thereby increasing the friction between the bow-shaped deformation part and the rotating shaft, thereby increasing the braking torque to enhance the braking effect.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a high-rigidity direct-drive horizontal turntable. Background Art

[0002] Direct drive turntable is also called DD drive turntable. Its working principle is to use direct drive method to directly transmit the motor drive torque to the rotating parts, so as to achieve high-precision rotation. Direct drive turntable usually adopts brushless motor and computer control system, which can achieve high-speed, high-precision and high-efficiency rotation. Direct drive turntable is suitable for application scenarios with high requirements for rotation smoothness, rotation speed and accuracy. For example, machine tools, semiconductor equipment, medical equipment, precision measuring instruments, etc.

[0003] The existing referenceable Chinese utility model patent with announcement number CN209375317U discloses a direct-drive turntable, including a motor housing, a motor rotor, and a front bearing assembly. The motor housing is open at both ends and hollow inside. The motor rotor is rotatably built into the motor housing, and both ends of the motor rotor pass through the motor housing. The front bearing assembly includes a front end cover, a front bearing inner cover, a front bearing outer cover, and a spherical roller bearing. The front end cover is sleeved on the motor rotor, and the front end cover is connected to an open end of the motor housing. The front bearing inner cover and the front bearing outer cover are coaxially arranged with the motor rotor and are respectively connected to the inner and outer sides of the front end cover. The front bearing outer cover is arranged on the side of the front end cover away from the motor housing. The spherical roller bearing is sleeved on the motor rotor shaft shoulder and is arranged between the front bearing inner cover and the front bearing outer cover. The outer peripheral surface of the spherical roller bearing abuts the front end cover. The front bearing adopts a spherical roller bearing, so that the motor rotor can adapt to the eccentricity error within a specified range and will not burn the spherical roller bearing.

[0004] The existing turntable brake mechanism is large in size, resulting in a large overall height of the turntable, which results in a large distance between the top of the turntable and the table surface when the turntable is placed on the workbench surface, affecting maintenance operations, and the existing turntable brake mechanism generally uses hydraulic equipment to adjust the spacing between the brake mechanisms, thereby clamping the annular brake pad fixedly connected to the turntable to achieve the braking effect. This method can only apply pressure to part of the brake pad, and the braking effect is poor. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a high-rigidity direct-drive horizontal turntable, which has the advantages of improving braking effect and small overall height of the turntable, thereby solving the above-mentioned technical problems.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-rigidity direct-drive horizontal turntable, comprising: an outer shell, an inner shell is fixedly installed below the outer shell, gas path 1 and gas path 2 are arranged inside the inner shell, an air intake pipe is fixedly installed below the inner shell, a bottom cover is fixedly installed inside the inner shell, a skeleton oil seal is embedded and installed above the bottom cover, a positioning pin is inserted and installed at the upper end of the inner shell, a bow-shaped deformation piece is inserted and installed below the positioning pin, an upper piston is movably installed below the bow-shaped deformation piece, a spring is fixedly installed below the upper piston, and a spring is fixedly installed below the spring. Cylinder body, a lower piston is movably installed below the upper piston, a rotating shaft is movably installed inside the bottom cover, a rotor connecting ring is inserted and installed above the rotating shaft, a motor rotor is fixedly installed below the rotor connecting ring, a motor stator is fixedly installed inside the outer shell, a limit block is fixedly installed above the outer shell, a V-seal base is fixedly installed above the limit block, a V-shaped seal is embedded above the V-seal base, a workbench is fixedly installed on the upper end of the rotating shaft, a bearing is fixedly installed below the workbench, and an encoder is fixedly installed above the bottom cover; the encoder is a time grating encoder, which can improve positioning accuracy.

[0009] As a preferred technical solution of the utility model, the outer shell and the inner shell are connected by bolts, the air intake pipe is installed at the lower end of air path one and air path two, and the air intake pipe is connected to air path one and air path two; the outer shell can limit the position of the motor stator.

[0010] As a preferred technical solution of the utility model, the bottom cover is installed at the center of the bottom surface of the inner shell by bolts, and the inner side surface of the skeleton oil seal is in contact with the rotating shaft; the bottom cover can limit the gas position.

[0011] As a preferred technical solution of the utility model, the positioning pin is fixed to the top of the inner shell in a circular shape at equal angles based on the center of the inner shell, and the lower end of the positioning pin passes through the top plane of the bow-shaped deformable part; the positioning pin can limit the position of the bow-shaped deformable part.

[0012] As a preferred technical solution of the utility model, a gap is left between the inner side surface of the bow-shaped deformation piece and the outer side surface of the rotating shaft, the upper end of the spring is fixedly connected to the upper piston, and the lower end of the spring is fixedly connected to the lower piston; the bow-shaped deformation piece can facilitate locking the rotating shaft.

[0013] As an optimal technical solution of the present utility model, the motor rotor is fixedly connected to the rotor connecting ring by bolts, the rotor connecting ring is fixed to the lower end of the outer ring structure at the top of the rotating shaft by bolts, the bearing is fixed to the bottom of the workbench by bolts, and the rotating shaft is rotatably connected to the outer shell through the bearing; the motor rotor can drive the rotating shaft to rotate.

[0014] As the preferred technical solution of the utility model, the limit block is connected to the V-seal base and the outer shell by bolts, and the top surface of the V-seal is in contact with the bottom surface of the workbench; the V-seal can play a sealing role and the limit block can easily limit the position of the bearing.

[0015] Compared with the prior art, the utility model provides a high-rigidity direct-drive horizontal turntable, which has the following beneficial effects:

[0016] 1. The utility model provides a bow-shaped deformation piece, which is annular and has a "bow"-shaped cross section. In the initial state, the spring applies a pressure upward to the upper piston, and the upper piston applies an upward pressure to the bow-shaped deformation piece, causing it to undergo initial deformation, and the inner diameter becomes smaller and holds the rotating shaft, thereby realizing the brake self-locking function. When the air circuit one is ventilated and the air circuit two is not ventilated, the upper piston and the lower piston move downward as a whole, and the bow-shaped deformation piece returns to its original state, the inner diameter becomes larger, and the inner side surface of the bow-shaped deformation piece does not contact the rotating shaft. When the air circuit two is ventilated and the air circuit one is not ventilated, the gas generates an upward thrust, and the upper piston and the lower piston move upward as a whole, further pressing the bow-shaped deformation piece on the basis of the spring elastic force. The inner diameter of the bow-shaped deformation piece becomes smaller under the action of pressure, and the inner wall of the bow-shaped deformation piece will contact the rotating shaft, and the relative pressure between the inner wall of the bow-shaped deformation piece and the rotating shaft will increase under the influence of the air pressure, thereby increasing the friction between the bow-shaped deformation piece and the rotating shaft, thereby increasing the braking torque to enhance the braking effect.

[0017] 2. The utility model sets an outer shell, and the motor stator is fixed to the inside of the outer shell by bolts. The motor rotor is installed below the top outer structure of the rotating shaft through a rotor connecting ring and bolts. The position of the bearing is limited by a limit block, and the bearing is fixed to the bottom of the workbench by bolts. The rotating shaft is rotatably connected with the outer shell through the bearing. After the motor rotor is energized, the rotating shaft will be driven to rotate under the influence of the motor stator and electromagnetic force. This method eliminates the connection between the turntable and the motor, and directly fixes the motor rotor and the motor stator inside the turntable, thereby reducing the overall height of the turntable. At the same time, the braking mechanism is driven by pneumatic means, which avoids the influence of the height of the hydraulic rod on the overall height in the hydraulic drive method, making the overall structure more compact and further shortening the turntable height. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the connection structure between the bow-shaped deformation member and the inner shell of the utility model;

[0021] Figure 4 This is a schematic diagram of the connection structure between the rotating shaft and the motor rotor of the utility model;

[0022] Among them: 1. outer shell; 2. inner shell; 3. gas circuit 1; 4. gas circuit 2; 5. intake pipe; 6. bottom cover; 7. skeleton oil seal; 8. positioning pin; 9. bow-shaped deformation part; 10. upper piston; 11. spring; 12. cylinder body; 13. lower piston; 14. rotating shaft; 15. rotor connecting ring; 16. motor rotor; 17. motor stator; 18. limit block; 19. V-seal base; 20. V-shaped seal; 21. workbench; 22. bearing; 23. encoder. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] See also Figure 1 - Figure 4In this embodiment, a high-rigidity direct-drive horizontal turntable includes: an outer shell 1, an inner shell 2 is fixedly installed below the outer shell 1, an air path 1 3 and an air path 2 4 are arranged inside the inner shell 2, an air intake pipe 5 is fixedly installed below the inner shell 2, a bottom cover 6 is fixedly installed inside the inner shell 2, a skeleton oil seal 7 is embedded and installed above the bottom cover 6, a positioning pin 8 is inserted and installed at the upper end of the inner shell 2, a bow-shaped deformation member 9 is inserted and installed below the positioning pin 8, an upper piston 10 is movably installed below the bow-shaped deformation member 9, a spring 11 is fixedly installed below the upper piston 10, and a cylinder 1 is fixedly installed below the spring 11 2. A lower piston 13 is movably installed below the upper piston 10, a rotating shaft 14 is movably installed inside the bottom cover 6, a rotor connecting ring 15 is inserted and installed above the rotating shaft 14, a motor rotor 16 is fixedly installed below the rotor connecting ring 15, a motor stator 17 is fixedly installed inside the outer shell 1, a limit block 18 is fixedly installed above the outer shell 1, a V-seal base 19 is fixedly installed above the limit block 18, a V-shaped seal 20 is embedded and installed above the V-seal base 19, a workbench 21 is fixedly installed on the upper end of the rotating shaft 14, a bearing 22 is fixedly installed below the workbench 21, and an encoder 23 is fixedly installed above the bottom cover 6.

[0027] The outer shell 1 and the inner shell 2 are connected by bolts, and the air intake pipe 5 is installed at the lower ends of the air path 1 3 and the air path 2 4 , and the air intake pipe 5 is connected with the air path 1 3 and the air path 2 4 .

[0028] The bottom cover 6 is installed at the center of the bottom surface of the inner housing 2 by bolts, and the inner side surface of the skeleton oil seal 7 is in contact with the rotating shaft 14 .

[0029] The positioning pin 8 is fixed to the top of the inner shell 2 in a circular shape with the center of the inner shell 2 as a reference and at equal angles, and the lower end of the positioning pin 8 passes through the top plane of the bow-shaped deformation member 9.

[0030] A gap is left between the inner side surface of the bow-shaped deformation member 9 and the outer side surface of the rotating shaft 14 . The upper end of the spring 11 is fixedly connected to the upper piston 10 , and the lower end of the spring 11 is fixedly connected to the lower piston 13 .

[0031] The motor rotor 16 is fixedly connected to the rotor connecting ring 15 by bolts, the rotor connecting ring 15 is fixed to the lower end of the outer ring structure at the top of the rotating shaft 14 by bolts, the bearing 22 is fixed to the bottom of the workbench 21 by bolts, and the rotating shaft 14 is rotatably connected to the outer shell 1 through the bearing 22.

[0032] The limiting block 18 is connected to the V-shaped seal base 19 and the outer shell 1 through bolts, and the top surface of the V-shaped seal 20 is in contact with the bottom surface of the workbench 21 .

[0033] Specifically, the outer shell 1 can limit the position of the motor stator 17, the inner shell 2 can limit the position of the bow-shaped deformation member 9 through the positioning pin 8, the air circuit 1 3 can make the upper piston 10 and the lower piston 13 move downward as a whole after the air is introduced, and the air circuit 2 4 can make the upper piston 10 and the lower piston 13 move upward as a whole after the air passes through, the intake pipe 5 can facilitate the air to enter the inside of the air circuit 1 3 and the air circuit 2 4, the bottom cover 6 can limit the gas position, the skeleton oil seal 7 can play a sealing role, the positioning pin 8 can limit the position of the bow-shaped deformation member 9, the bow-shaped deformation member 9 can facilitate locking the rotating shaft 14, the upper piston 10 can facilitate applying an upward force to the bow-shaped deformation member 9, and the spring 11 can make the bow-shaped deformation Component 9 produces initial deformation, cylinder body 12 can limit the position of the lower end of spring 11, lower piston 13 can support upper piston 10, rotating shaft 14 can drive workbench 21 to rotate, rotor connecting ring 15 can facilitate fixed connection between motor rotor 16 and rotating shaft 14, motor rotor 16 can drive rotating shaft 14 to rotate, motor stator 17 can facilitate rotation of motor rotor 16, limit block 18 can facilitate limiting the position of bearing 22, V-seal base 19 can limit the position of V-shaped seal 20, V-shaped seal 20 can play a sealing role, workbench 21 can support maintenance equipment, bearing 22 can facilitate rotation of rotating shaft 14, encoder 23 is a time grating encoder, which can improve positioning accuracy.

[0034] When in use, the bow-shaped deformation piece 9 is annular and has a "bow"-shaped cross-section. In the initial state, the spring 11 applies a pressure upward to the upper piston 10, and the upper piston 10 applies an upward pressure to the bow-shaped deformation piece 9, causing it to undergo initial deformation, and the inner diameter becomes smaller and holds the rotating shaft 14, thereby realizing the brake self-locking function. When the gas circuit 1 3 is ventilated and the gas circuit 2 4 is not ventilated, the upper piston 10 and the lower piston 13 move downward as a whole, and the bow-shaped deformation piece 9 returns to its original state, the inner diameter becomes larger, and the inner side of the bow-shaped deformation piece 9 does not contact the rotating shaft 14. When the gas circuit 2 4 is ventilated and the gas circuit 1 3 is not ventilated, the gas generates an upward thrust, and the upper piston 10 and the lower piston 13 move upward as a whole, further compressing the bow-shaped deformation piece 9 on the basis of the elastic force of the spring 11. The inner diameter of the bow-shaped deformation piece 9 becomes smaller under the action of pressure, and the inner wall of the bow-shaped deformation piece 9 will contact the rotating shaft 14, and the relative pressure between the inner wall of the bow-shaped deformation piece 9 and the rotating shaft 14 will be affected by the air pressure. The friction between the bow-shaped deformation member 9 and the rotating shaft 14 is increased, thereby increasing the braking torque to enhance the braking effect. The motor stator 17 is fixed to the inside of the outer shell 1 by bolts, and the motor rotor 16 is installed below the top shape structure of the rotating shaft 14 through the rotor connecting ring 15 and bolts. The position of the bearing 22 is limited by the limit block 18, and the bearing 22 is fixed to the bottom of the workbench 21 by bolts. The rotating shaft 14 is connected to the outer shell 1 through the bearing 22. After the motor rotor 16 is energized, the rotating shaft 14 is driven to rotate under the influence of the motor stator 17 and the electromagnetic force. This method cancels the connection between the turntable and the motor, and directly fixes the motor rotor 16 and the motor stator 17 inside the turntable, thereby reducing the overall height of the turntable. At the same time, the braking mechanism is driven by pneumatic means, which avoids the influence of the height of the hydraulic rod on the overall height in the hydraulic drive method, making the overall more compact and further shortening the turntable height.

[0035] 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.

Claims

1. A high-rigidity direct-drive horizontal turntable, characterized in that: include: An outer shell (1), an inner shell (2) is fixedly installed below the outer shell (1), an air path 1 (3) and an air path 2 (4) are arranged inside the inner shell (2), an air intake pipe (5) is fixedly installed below the inner shell (2), a bottom cover (6) is fixedly installed inside the inner shell (2), a skeleton oil seal (7) is embedded and installed above the bottom cover (6), a positioning pin (8) is inserted and installed at the upper end of the inner shell (2), a bow-shaped deformation member (9) is inserted and installed below the positioning pin (8), an upper piston (10) is movably installed below the bow-shaped deformation member (9), a spring (11) is fixedly installed below the upper piston (10), a cylinder (12) is fixedly installed below the spring (11), and a lower portion of the upper piston (10) is provided with a spring (11). A lower piston (13) is movably mounted, a rotating shaft (14) is movably mounted inside the bottom cover (6), a rotor connecting ring (15) is inserted and mounted above the rotating shaft (14), a motor rotor (16) is fixedly mounted below the rotor connecting ring (15), a motor stator (17) is fixedly mounted inside the outer shell (1), a limit block (18) is fixedly mounted above the outer shell (1), a V-shaped seal base (19) is fixedly mounted above the limit block (18), a V-shaped seal (20) is embedded and mounted above the V-shaped seal base (19), a workbench (21) is fixedly mounted on the upper end of the rotating shaft (14), a bearing (22) is fixedly mounted below the workbench (21), and an encoder (23) is fixedly mounted above the bottom cover (6).

2. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: The outer shell (1) and the inner shell (2) are connected by bolts, and the air intake pipe (5) is installed at the lower ends of the air path one (3) and the air path two (4), and the air intake pipe (5) is connected to the air path one (3) and the air path two (4).

3. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: The bottom cover (6) is installed at the center of the bottom surface of the inner shell (2) by means of bolts, and the inner side surface of the skeleton oil seal (7) is in contact with the rotating shaft (14).

4. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: The positioning pin (8) is fixed to the top of the inner shell (2) in a circular shape with the center of the inner shell (2) as a reference and at equal angles, and the lower end of the positioning pin (8) passes through the top plane of the bow-shaped deformation piece (9).

5. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: A gap is left between the inner side surface of the bow-shaped deformation member (9) and the outer side surface of the rotating shaft (14); the upper end of the spring (11) is fixedly connected to the upper piston (10); and the lower end of the spring (11) is fixedly connected to the lower piston (13).

6. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: The motor rotor (16) is fixedly connected to the rotor connecting ring (15) by bolts, the rotor connecting ring (15) is fixed to the lower end of the outer ring structure at the top of the rotating shaft (14) by bolts, the bearing (22) is fixed to the bottom of the workbench (21) by bolts, and the rotating shaft (14) is rotatably connected to the outer shell (1) through the bearing (22).

7. The high-rigidity direct-drive horizontal turntable according to claim 1, characterized in that: The limit block (18) is connected to the V-shaped seal base (19) and the outer shell (1) through bolts, and the top surface of the V-shaped seal (20) is in contact with the bottom surface of the workbench (21).

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