Rotary table with high applicability

Abstract

The invention relates to a high-applicability rotary table which comprises a shell and a fixed mandrel, the shell covers the outer surface of the fixed mandrel, a rotating assembly is arranged in the shell and comprises a stator and a rotor, the stator is fixedly connected to the inner circumferential side wall of the shell, the rotor is rotationally arranged in the shell, and the stator is fixedly connected to the inner circumferential side wall of the shell. The inner side wall of the shell is rotationally connected with a rotor fixing sleeve through a rotary table bearing, the end face of one side of the rotor fixing sleeve is fixedly connected with the rotor, and the end face of the other opposite side of the rotor fixing sleeve is fixedly connected with a main shaft connecting plate. Through the arrangement, a middle transmission means is omitted, and the possibility that the rotation precision of the rotary table is reduced due to the existence of a transmission gap is avoided. The rotary table has the effect of improving the applicability of the rotary table.

Description

Technical Field

[0001] The present application relates to the technical field of turntables, and in particular to a turntable with high applicability. Background Art

[0002] The turntable is an important functional component of the machining center. Its rotary motion is linked with other linear axes to process various complex curved surfaces or special-shaped parts. With the development of multifunctional composite CNC machine tools, using turntables to expand machine tool functions has become an important part of machine tool development.

[0003] A Chinese patent with publication number CN111922997A discloses a turntable. The turntable in the prior art does not have a motor disclosed inside, so the turntable can only be connected to the motor externally. When the turntable is installed, the external motor spindle needs to be connected to the turntable spindle through transmission connection means such as a worm gear or a cam roller. However, in the actual installation process of the turntable, no matter what transmission connection means are used, due to the actual needs of design and manufacturing, in order to ensure the smoothness of transmission and facilitate installation and debugging, it is inevitable that there is a certain transmission gap. At the same time, as the turntable is used, the transmission gap will increase due to the wear of the transmission parts, and the rotation accuracy of the turntable will be reduced due to the existence or increase of the gap. If the turntable in the prior art is used for high-precision equipment parts processing, the processing accuracy of the parts will be reduced, and the applicability of the turntable will be reduced. Summary of the invention

[0004] In order to improve the applicability of a turntable, the present application provides a turntable with high applicability.

[0005] The present application provides a highly applicable turntable adopting the following technical solution: A turntable with high applicability includes a shell and a fixed core shaft, the shell cover is arranged on the outer surface of the fixed core shaft, a rotating assembly is arranged inside the shell, the rotating assembly includes a stator and a rotor, the stator is fixedly connected to the inner peripheral side wall of the shell, the rotor is rotatably arranged inside the shell, the inner side wall of the shell is rotatably connected to a rotor fixing sleeve through a turntable bearing, one side end face of the rotor fixing sleeve is fixedly connected to the rotor, and the other side end face opposite to it is fixedly connected to a main shaft connecting plate.

[0006] By adopting the above technical scheme, the rotor is driven to rotate by electromagnetic induction between the stator and the rotor, the rotor drives the spindle connecting plate to rotate through the rotor fixing sleeve, the spindle connecting plate drives the externally connected tool to rotate, the stator and the rotor are installed inside the machine body, and the rotor is directly connected to the spindle connecting plate of the turntable. This arrangement eliminates the intermediate transmission means, avoids the possibility of reduced turntable rotation accuracy due to the existence of transmission gap, ensures the processing accuracy of the product, and thus makes the turntable suitable for more parts with higher processing dimensional accuracy requirements, thereby improving the applicability of the turntable.

[0007] Optionally, a brake mechanism is provided inside the shell, and the brake mechanism includes a brake ring assembly and a drive assembly, and the brake ring assembly includes a first brake ring, a second brake ring and a third brake ring, the first brake ring and the third brake ring are fixedly connected to the rotor fixing sleeve by bolts, the second brake ring is arranged between the first brake ring and the third brake ring, and the drive assembly is arranged on the fixed core shaft, when the turntable is powered on and rotated, the drive assembly makes the second brake ring be between the first brake ring and the third brake ring and not contact each other, and when the turntable is powered off and stops, the drive assembly drives the second brake ring to move toward the third brake ring.

[0008] By adopting the above technical scheme, when the turntable rotates to a predetermined angle, the brake mechanism is started, and the driving assembly drives the second brake ring to move toward the third brake ring. The bottom surface of the second brake ring gradually presses against the surface of the rotating third brake ring. When the second brake ring and the third brake ring are tightly fitted, since the third brake ring is stationary, the second brake ring will deform while pressing against the third brake ring, and the second brake ring will partially rise and contact the first brake ring. At this time, the upper and lower end faces of the second brake ring work together to prevent the rotation of the first brake ring and the third brake ring, so that the turntable stops quickly at a predetermined angle. The setting of the brake mechanism realizes rapid braking of the turntable and shortens the response time of the turntable stopping rotation, thereby further improving the rotation accuracy of the turntable and improving the applicability of the turntable.

[0009] Optionally, the driving assembly includes a hydraulic cylinder head arranged on the fixed core shaft, a support block is provided on the hydraulic cylinder head, the top surface of the support block is in contact with the bottom surface of the third brake ring, an oil chamber is formed between the inner circumferential side wall of the hydraulic cylinder head and the outer surface of the fixed core shaft, a piston block is slidably connected in the oil chamber, the second brake ring is fixedly connected to the piston block, a disc spring is arranged in the oil chamber, one end of the disc spring is connected to the bottom surface of the hydraulic cylinder head, and the other end is connected to the piston block, an oil channel connected to the oil chamber is opened on the fixed core shaft, and the oil channel is connected to an external hydraulic oil source. When the turntable rotates, the hydraulic oil enters the oil chamber through the oil channel, and the disc spring is compressed.

[0010] By adopting the above technical solution, when the turntable rotates, the hydraulic oil enters the oil chamber through the oil channel, and the oil pressure causes the piston block to move toward the third brake ring. At this time, the disc spring is compressed, and the oil pressure in the oil chamber and the thrust of the disc spring are gradually balanced. The piston block keeps the second brake ring between the first brake ring and the third brake ring and does not contact each other. At this time, the turntable rotates smoothly; when the turntable rotates to a predetermined angle and the power is cut off, the hydraulic oil in the oil chamber flows out through the oil channel, the pressure in the oil chamber is reduced, and the disc spring pressure is released to push the piston block to move in the direction away from the third brake ring. The movement of the piston block drives The second brake ring is close to the third brake ring. Since the bottom surface of the third brake ring is stably supported by the support block, the third brake ring cannot move and cannot deform. Therefore, when the second brake ring is pressed against the third brake ring, the second brake ring partially rises and contacts the first brake ring. At this time, the upper and lower end surfaces of the second brake ring work together to prevent the rotation of the first brake ring and the third brake ring, thereby playing a braking role. The setting of the brake mechanism realizes that when the turntable is rotating, the turntable can selectively brake or rotate automatically, so that the turntable can be used in different operating conditions, and the applicability of the turntable is further improved.

[0011] Optionally, a pressure block is provided on the surface of the second brake ring, and the pressure block and the second brake ring are fixedly connected to the piston block by bolts. When the turntable rotates, a gap is left between the bottom surface of the pressure block and the surface of the first brake ring.

[0012] By adopting the above technical solution, in the process that the piston block drives the second brake ring to move toward the third brake ring, the piston block drives the pressure block to move at the same time, and the movement of the pressure block pushes the part of the first brake ring and the pressure block that is tightly attached to deform toward the second brake ring, the contact area between the second brake ring and the first brake ring increases, and the friction force between the first brake ring and the second brake ring increases. At the same time, under the superposition effect of the pressure block and the first brake ring, the pressure applied to the second brake ring increases, thereby increasing the friction force between the second brake ring and the third brake ring. The setting of the pressure block significantly increases the total friction force used for braking in the brake mechanism, thereby enabling the turntable to achieve rapid braking in a shorter time, helping the turntable to stop accurately at a predetermined position, and improving the angular positioning accuracy of the turntable.

[0013] Optionally, the oil chamber is step-shaped, and the outer surface of the piston block is sleeved with a plurality of sealing rings.

[0014] By adopting the above technical solution, the stepped oil chamber structure can effectively reduce the existence of gaps, and at the same time cooperate with the sealing ring to improve the sealing performance at the disc spring installation position, reducing the adverse effect of the disc spring immersed in the hydraulic oil on the elastic force of the disc spring.

[0015] Optionally, a plurality of strip grooves are provided on the first brake ring, the second brake ring and the third brake ring, and chip removal holes are connected to the strip grooves. The chip removal holes on the first brake ring and the third brake ring are arranged toward the rotor, and a chip removal chamber is formed between the rotor and the fixed core shaft.

[0016] By adopting the above technical solution, during the braking process, the first brake ring, the second brake ring and the third brake ring are constantly rubbed, and the material of the brake ring is gradually worn to form fine granular waste chips. During the rotation of the turntable, the waste chips mixed in the brake ring assembly will be subjected to the centrifugal force away from the center of the turntable. At this time, the waste chips between the brake ring assemblies are thrown along the strip grooves to the chip removal holes, and finally accumulated at the bottom of the chip removal chamber through the chip removal chamber. Such a setting reduces the possibility of residual waste chips reducing the brake contact area, thereby effectively ensuring the friction between the second brake ring and the first brake ring and the second brake ring, reducing the influence of waste chips on the braking effect. At the same time, the setting of the strip grooves and the chip removal chamber provides a heat dissipation channel for the brake ring assembly, reducing the possibility of heat accumulation between the brake ring assemblies and causing deformation of the brake ring.

[0017] Optionally, a sealing assembly is provided on the shell, and the sealing assembly includes a sealing cover plate and a waterproof sealing cover, the sealing cover plate is provided on the shell, the waterproof sealing cover is provided on the main shaft connecting plate, the shell and the sealing cover plate are provided with mutually connected air passages, the air passages are externally connected to positive pressure air, a primary sealing cavity is formed between the sealing cover plate and the main shaft connecting plate, the primary sealing cavity is connected to the air passage, a primary sealing slit is formed between the main shaft connecting plate and the sealing cover plate, a secondary sealing cavity connected to the primary sealing slit is formed between the sealing cover plate and the waterproof sealing cover, and a secondary sealing slit is formed between the sealing cover plate and the waterproof sealing cover.

[0018] By adopting the above technical scheme, when the turntable rotates, positive-pressure air flows into the primary sealing chamber through the airway, and the pressure of the primary sealing chamber gradually increases. When the pressure in the primary sealing chamber is higher than the pressure in the secondary sealing chamber, the positive-pressure air flows into the secondary sealing chamber through the primary sealing slit, so that the pressure in the secondary sealing chamber gradually becomes higher than the external atmospheric pressure. When the turntable is used in an environment with severe water mist in the machine tool, under the existence of pressure difference, it is difficult for external water mist and waste particles to overcome the resistance of positive-pressure air and enter the interior of the turntable. At the same time, the positive-pressure air forms a layer of high-speed flowing air curtain at the two sealing slits, which further blocks external pollutants from entering the interior of the turntable. The setting of the sealing assembly improves the sealing performance of the turntable and reduces the adverse effects of external pollutants entering the interior of the turntable on the rotating assembly and the braking mechanism.

[0019] Optionally, the sealing assembly further includes a contact seal arranged between the sealing cover plate and the rotor fixing sleeve.

[0020] By adopting the above technical scheme, heat will be dissipated during the rotation of the turntable, and the air temperature in the turntable will increase. When the turntable stops rotating, the air inside the turntable expands and contracts, and the pressure in the primary sealing chamber and the secondary sealing chamber decreases. At this time, the external air enters the primary sealing chamber along the primary sealing slit, and the contact seal can prevent the external air from being sucked into the shell, thereby preventing external moisture from entering the shell. At the same time, the contact seal is arranged at the innermost part of the shell, and the contact seal is closest to the rotation center. Therefore, when the turntable rotates, the contact seal rotates at a low linear speed and generates little heat during rotation, which is adapted to the high rotation speed of the turntable.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application sets a rotating assembly, installs the stator and the rotor inside the machine body, and uses the rotor to directly connect with the main shaft connecting plate of the turntable. The setting of the rotating assembly eliminates the intermediate transmission means, avoids the possibility of reducing the rotation accuracy of the turntable due to the existence of transmission gap, ensures the processing accuracy of the product, and thus enables the turntable to be applicable to more parts with higher processing dimensional accuracy requirements, and improves the applicability of the turntable; 2. The present application provides a brake mechanism, which realizes rapid braking of the turntable and shortens the response time of the turntable stopping rotation, thereby further improving the rotation accuracy of the turntable and improving the applicability of the turntable; 3. The present application provides strip grooves, chip removal holes and chip removal chambers, which reduce the possibility of residual waste chips reducing the brake contact area, thereby effectively ensuring the friction between the second brake ring and the first brake ring and the second brake ring, and reducing the impact of waste chips on the braking effect. At the same time, the provision of the strip grooves and chip removal chambers provides a heat dissipation channel for the brake ring assembly, reducing the possibility of heat accumulation between the brake ring assemblies and causing deformation of the brake ring; 4. The present application improves the sealing performance of the turntable by setting up a sealing component, through a multiple combination of positive pressure air seals and contact seals, so that the turntable can be used in harsh water mist environments, reducing the possibility of water mist and waste particles entering the interior of the turntable, thereby ensuring the normal operation of the rotating components and brake mechanisms in the turntable and improving the applicability of the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of this application.

[0023] Figure 2 It is a cross-sectional view of the shell used to illustrate the rotating component in the embodiment of the present application.

[0024] Figure 3 It is a cross-sectional view of the housing used to illustrate the brake mechanism in the embodiment of the present application.

[0025] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0026] Figure 5 It is a schematic diagram of an explosion between the first brake ring, the second brake ring and the third brake ring in an embodiment of the present application.

[0027] Figure 6 It is a cross-sectional view of the shell used to illustrate the position of the airway and the sealing component in the embodiment of the present application.

[0028] Figure 7 It is a cross-sectional view of a waterproof sealing cover used to illustrate a primary sealing cavity and a secondary sealing cavity in an embodiment of the present application.

[0029] Figure 8 yes Figure 7 Enlarged view of point B in the middle.

[0030] Fig. 9 It is a schematic diagram of the structure of the horizontal installation of the turntable in the embodiment of the present application.

[0031] Description of reference numerals: 1. housing; 2. fixed spindle; 21. oil channel; 22. hydraulic oil interface; 23. air channel; 24. air pipe joint; 3. spindle connecting plate; 4. rotating assembly; 41. stator; 42. rotor; 43. turntable bearing; 44. rotor fixing sleeve; 5. encoder assembly; 6. brake mechanism; 61. brake ring assembly; 611. first brake ring; 612. second brake ring; 613. third brake ring; 62. drive assembly; 621. Hydraulic cylinder head; 622. Support block; 623. Piston block; 624. Disc spring; 7. Oil chamber; 8. Sealing ring; 9. Pressure block; 10. Strip groove; 101. Chip removal hole; 102. Chip removal chamber; 11. Sealing assembly; 111. Sealing cover plate; 112. Waterproof sealing cover; 113. Contact seal; 12. Primary sealing chamber; 121. Primary sealing slit; 13. Secondary sealing chamber; 131. Secondary sealing slit; 14. Box body. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-9 This application is described in further detail.

[0033] The embodiment of the present application discloses a turntable with high applicability.

[0034] Reference Figure 1A turntable with high applicability includes a shell 1 and a fixed spindle 2. The shell 1 is fixed on the outer surface of the fixed spindle 2 through a bolt fixing cover. The fixed spindle 2 is used to connect with a machine tool. A spindle connecting plate 3 is provided on the top surface of the shell 1. The spindle connecting plate 3 is used to be connected to a tool shaft to be connected. A rotating component 4 for driving the spindle connecting plate 3 to rotate is provided inside the shell 1.

[0035] Reference Figure 1 and Figure 2 The rotating assembly 4 includes a stator 41 and a rotor 42. The stator 41 is fixedly connected to the inner peripheral side wall of the shell 1 by bolts. The rotor 42 is arranged inside the shell 1. A rotor fixing sleeve 44 is rotatably connected to the inner side wall of the shell 1 near the main shaft connecting plate 3 through a turntable bearing 43. The upper surface of the rotor fixing sleeve 44 is fixedly connected to the main shaft connecting plate 3 by bolts, and the lower surface is fixedly connected to the rotor 42 by bolts. In order to achieve precise rotation of the turntable, an encoder assembly 5 for detecting the rotation angle of the main shaft connecting plate 3 is fixedly installed inside the fixed core shaft 2 and the shell 1. Detecting the rotation angle of the main shaft connecting plate 3 by an encoder is a prior art and will not be repeated in this embodiment.

[0036] After the fixed core shaft 2 is installed on the machine tool, the stator 41 inside the turntable is energized, and the rotor 42 is driven to rotate through the electromagnetic induction between the stator 41 and the rotor 42. The rotor 42 drives the spindle connecting plate 3 to rotate through the rotor fixing sleeve 44, and the spindle connecting plate 3 drives the externally connected tool to rotate. The stator 41 and the rotor 42 are installed inside the machine body, and the rotor 42 is directly connected to the spindle connecting plate 3 of the turntable. This arrangement eliminates the intermediate transmission means, avoids the possibility of reduced turntable rotation accuracy due to the existence of transmission gap, ensures the processing accuracy of the product, and enables the turntable to be suitable for processing more parts with higher dimensional accuracy requirements, thereby improving the applicability of the turntable.

[0037] Reference Figure 2 and Figure 3 When the encoder assembly 5 detects that the turntable rotates to a predetermined angle, the encoder assembly 5 disconnects the current transmission to the rotating assembly 4 through the control system, and the turntable stops rotating at this time. However, since the turntable has a certain inertia during the rotation process, and the electromagnetic induction does not disappear immediately after the current is suddenly disconnected, but gradually weakens in a certain room, the spindle connecting plate 3 may still produce a slight rotation after the current is disconnected, thereby reducing the rotation accuracy of the turntable.

[0038] Referring to the figure, in order to solve the above problem, a brake mechanism 6 is arranged inside the shell 1, and the brake mechanism 6 includes a brake ring assembly 61 and a drive assembly 62. The brake ring assembly 61 includes a first brake ring 611, a second brake ring 612 and a third brake ring 613 which are arranged in sequence in the vertical direction from the main shaft connecting plate 3 to the fixed core shaft 2. The axes of the first brake ring 611, the second brake ring 612 and the third brake ring 613 are on the same straight line with the axis of the main shaft connecting plate 3. The first brake ring 611 and the third brake ring 613 are fixedly connected to the bottom surface of the rotor fixing sleeve 44 by bolts and brake ring pressing blocks 9. The first brake ring 611 and the third brake ring 613 have the same size and shape, and the outer ring diameter of the second brake ring 612 is smaller than that of the first brake ring 611.

[0039] Reference Figure 3 and Figure 4 When the turntable is powered on and rotated, the driving component 62 drives the second brake ring 612 to be between the first brake ring 611 and the third brake ring 613 and not in contact with each other. When the turntable rotates to a predetermined angle and the power is turned off, the driving component 62 drives the second brake ring 612 to move toward the third brake ring 613, and the bottom surface of the second brake ring 612 gradually presses against the surface of the rotating third brake ring 613. When the second brake ring 612 and the third brake ring 613 are closely fitted, since the third brake ring 613 does not move, the second brake ring 612 will deform while pressing against the third brake ring 613, and the second brake ring 612 partially tilts up and contacts the first brake ring 611. At this time, the upper and lower end surfaces of the second brake ring 612 work together to prevent the rotation of the first brake ring 611 and the third brake ring 613, so that the turntable stops quickly at a predetermined angle. The setting of the brake mechanism 6 realizes the rapid braking of the turntable and shortens the response time of the turntable stopping rotation, thereby further improving the rotation accuracy of the turntable and improving the applicability of the turntable.

[0040] Reference Figure 2 , Figure 3 and Figure 4The driving assembly 62 includes a hydraulic cylinder cover 621 fixedly connected to the fixed core shaft 2 by bolts. The hydraulic cylinder cover 621 is L-shaped. A support block 622 is fixedly connected to the surface of the hydraulic cylinder cover 621. The surface of the support block 622 is in contact with the bottom surface of the third brake ring 613. The inner peripheral side wall of the hydraulic cylinder cover 621 and the outer surface of the fixed core shaft 2 form an oil chamber 7. A piston block 623 is slidably connected in the oil chamber 7. The piston block 623 is L-shaped. The two opposite surfaces of the vertical section of the piston block 623 are respectively in contact with the hydraulic cylinder cover 621 and the fixed core shaft 2. The second brake ring 612 is fixedly connected to the surface of the vertical section of the piston block 623, a disc spring 624 is arranged in the oil chamber 7, one end of the disc spring 624 is fixedly connected to the bottom surface of the hydraulic cylinder cover 621, and the other end is fixedly connected to the surface of the horizontal section of the piston block 623, an oil passage 21 connected to the oil chamber 7 is opened on the fixed core shaft 2, the oil passage 21 is connected to the external hydraulic oil source through the hydraulic oil interface 22, and the hydraulic oil interface 22 is fixedly installed on the outer surface of the shell 1, when the turntable rotates, the hydraulic oil enters the oil chamber 7 through the oil passage 21, and the disc spring 624 is compressed.

[0041] Reference Figure 2 , Figure 3 and Figure 4 The oil chamber 7 is stepped and the outer surface of the horizontal section of the piston block 623 is sleeved with a plurality of sealing rings 8. This arrangement improves the sealing performance at the installation position of the disc spring 624 and reduces the adverse effect of the disc spring 624 immersed in the hydraulic oil on the elastic force of the disc spring 624.

[0042] When the turntable rotates, the hydraulic oil enters the oil chamber 7 through the oil passage 21, and the oil pressure pushes the piston block 623 to move toward the third brake ring 613. At this time, the disc spring 624 is compressed, and the oil pressure in the oil chamber 7 and the thrust of the disc spring 624 are gradually balanced. The piston block 623 keeps the second brake ring 612 between the first brake ring 611 and the third brake ring 613 and does not contact each other. At this time, the turntable rotates smoothly; when the turntable rotates to a predetermined angle and the power is cut off, the hydraulic oil in the oil chamber 7 flows out through the oil passage 21, the pressure in the oil chamber 7 is reduced, and the pressure of the disc spring 624 is released to push the piston block 623 to move in the direction away from the third brake ring 613, and the piston block 623 moves The second brake ring 612 is driven to move. Since the bottom surface of the third brake ring 613 is stably supported by the support block 622, the third brake ring 613 cannot move and cannot be deformed. Therefore, when the second brake ring 612 is pressed against the third brake ring 613, the second brake ring 612 is partially tilted and contacts the first brake ring 611. At this time, the upper and lower end surfaces of the second brake ring 612 work together to prevent the rotation of the first brake ring 611 and the third brake ring 613, thereby playing a braking role. The setting of the brake mechanism 6 realizes that when the turntable is rotating, the turntable can be selectively braked or rotated automatically, so that the turntable can be used in different operating conditions, and the applicability of the turntable is further improved.

[0043] Reference Figure 2 , Figure 3 and Figure 4 The surface of the second brake ring 612 is provided with a pressure block 9, and the pressure block 9 and the second brake ring 612 are connected to the piston block 623 by bolts. When the turntable rotates, a gap is left between the bottom surface of the pressure block 9 and the surface of the first brake ring 611. In the process that the piston block 623 drives the second brake ring 612 to move toward the third brake ring 613, the piston block 623 drives the pressure block 9 to move at the same time. The movement of the pressure block 9 pushes the part of the first brake ring 611 that is tightly attached to the pressure block 9 to deform toward the second brake ring 612, and the second brake ring 612 and the first brake ring 611 are deformed. The contact area between them increases, and the friction force between the first brake ring 611 and the second brake ring 612 increases. At the same time, under the superposition effect of the pressure block 9 and the first brake ring 611, the pressure applied to the second brake ring 612 increases, thereby increasing the friction force between the second brake ring 612 and the third brake ring 613. The setting of the pressure block 9 further increases the total friction force used for braking in the brake mechanism 6, so that the turntable can be braked quickly in a shorter time, which helps the turntable to stop accurately at a predetermined position, and further improves the angular positioning accuracy of the turntable.

[0044] Reference Figure 2 , Figure 3 and Figure 4 During the braking process, the first brake ring 611, the second brake ring 612 and the third brake ring 613 are constantly rubbing against each other, and the materials of the brake rings are gradually worn to form fine granular waste chips. If the waste chips are not discharged in time, they will accumulate in the gap between the first brake ring 611 and the third brake ring 613 and the second brake ring 612. When the turntable rotates, the presence of the waste chips will cause the first brake ring 611 and the third brake ring 613 to be subjected to friction, thereby reducing the rotation accuracy of the turntable. When the turntable brakes to a stop, the presence of the waste chips will cause the actual contact area between the two surfaces of the second brake ring 612 and the first brake ring 611 and the third brake ring 613 to become smaller, thereby reducing the braking friction between the brake ring assembly 61 and weakening the braking effect.

[0045] Reference Figure 5 and Figure 6 In order to solve the above technical problems, a plurality of strip grooves 10 are provided on the first brake ring 611, the second brake ring 612 and the third brake ring 613. The plurality of strip grooves 10 are evenly and equidistantly distributed on the outer ring of the brake ring assembly 61. Each strip groove 10 is connected to a chip removal hole 101. The diameter of the chip removal hole 101 is greater than the width of the strip groove 10. The chip removal holes 101 on the first brake ring 611 and the third brake ring 613 are both arranged toward the rotor 42. A chip removal cavity 102 is formed between the inner surface of the rotor 42 and the outer surface of the fixed core shaft 2. The chip removal cavity 102 is connected to the chip removal hole 101.

[0046] During the rotation of the turntable, the waste chips mixed in the brake ring assembly 61 will be subjected to the centrifugal force away from the center of the turntable. Therefore, most of the brake assembly moves along the strip groove 10 to the chip removal holes 101 of the first brake ring 611 and the third brake ring 613, and finally falls to the bottom of the chip removal chamber 102. This arrangement reduces the possibility of residual waste chips reducing the braking contact area, thereby effectively ensuring the friction between the second brake ring 612 and the first brake ring 611 and the second brake ring 612, reducing the influence of waste chips on the braking effect. At the same time, the arrangement of the strip groove 10 and the chip removal chamber 102 provides a heat dissipation channel for the brake ring assembly 61, reducing the possibility of heat accumulation between the brake ring assembly 61 and causing deformation of the brake ring.

[0047] Reference Figure 6 , Figure 7 and Figure 8 A sealing assembly 11 is provided on the shell 1, and the sealing assembly 11 includes a sealing cover plate 111 and a waterproof sealing cover 112. The sealing cover plate 111 is fixedly connected to the shell 1 by bolts, and the waterproof sealing cover 112 is fixedly connected to the main shaft connecting plate 3 by bolts. The shell 1 and the sealing cover plate 111 are provided with air passages 23 that are interconnected. An air pipe joint 24 connected to an external positive pressure air source is fixedly installed on the outer surface of the shell 1. A primary sealing cavity 12 that is connected to the air path is enclosed between the sealing cover plate 111 and the main shaft connecting plate 3. A primary sealing slit 121 is formed between the main shaft connecting plate 3 and the sealing cover plate 111. A secondary sealing cavity 13 that is connected to the primary sealing slit 121 is enclosed between the sealing cover plate 111 and the waterproof sealing cover 112. A secondary sealing slit 131 is formed between the sealing cover plate 111 and the waterproof sealing cover 112. Both the primary sealing cavity 12 and the secondary sealing cavity 13 are stepped.

[0048] When the turntable rotates, the positive-pressure air flows into the primary sealing chamber 12 through the air passage 23, and the pressure of the primary sealing chamber 12 gradually increases. When the pressure in the primary sealing chamber 12 is higher than that in the secondary sealing chamber 13, the positive-pressure air flows into the secondary sealing chamber 13 through the primary sealing slit 121, thereby causing the pressure in the secondary sealing chamber 13 to gradually become higher than the external atmospheric pressure. When the turntable is used in an environment where there is severe water mist in the machine tool, under the existence of a pressure difference, it is difficult for the external water mist and waste particles to overcome the resistance of the positive-pressure air and enter the interior of the turntable. At the same time, when the positive-pressure air passes through the primary sealing slit 121 and the secondary sealing slit 131, the flow rate of the positive-pressure air is significantly increased. The positive-pressure air is squeezed by the primary sealing slit 121 and the secondary sealing slit 131 to form a layer of high-speed flowing air curtain, which further blocks external pollutants from entering the interior of the turntable. The setting of the sealing assembly 11 improves the sealing performance of the turntable, and reduces the adverse effects of external pollutants entering the interior of the turntable on the rotating assembly 4 and the brake mechanism 6.

[0049] Reference Figure 6 , Figure 7 and Figure 8 The sealing assembly 11 also includes a contact seal 113 arranged between the sealing cover plate 111 and the rotor fixing sleeve 44. In the present embodiment, the contact seal 113 is a TC skeleton oil seal, which will emit heat during the rotation of the turntable, and the air temperature in the turntable will increase. When the turntable stops rotating, the air inside the turntable expands and contracts due to heat and cold, and the pressure in the primary sealing chamber 12 and the secondary sealing chamber 13 decreases. At this time, the external air enters the primary sealing chamber 12 along the primary sealing slit 121, and the contact seal 113 can prevent the external air from being sucked into the shell 1, thereby preventing external moisture from entering the shell 1. At the same time, the contact seal 113 is arranged at the innermost part of the shell 1, and the contact seal 113 is closest to the rotation center. Therefore, when the turntable rotates, the contact seal 113 rotates at a low linear speed and generates little heat during rotation, which is adapted to the high rotation speed of the turntable.

[0050] Reference Fig. 9 In order to realize the horizontal installation of the turntable on the machine tool, the outer surface of the shell 1 is fixedly connected with a box 14. When the turntable needs to be horizontally installed on the machine tool, the worker connects to the machine tool through the box 14. This arrangement allows the turntable to adapt to different installation requirements and further improves the applicability of the turntable.

[0051] The implementation principle of a turntable with high applicability in an embodiment of the present application is as follows: the rotor 42 is driven to rotate by electromagnetic induction between the stator 41 and the rotor 42, the rotor 42 drives the spindle connecting plate 3 to rotate through the rotor fixing sleeve 44, and the spindle connecting plate 3 drives the externally connected tool to rotate, the stator 41 and the rotor 42 are installed inside the machine body, and the rotor 42 is directly connected to the spindle connecting plate 3 of the turntable. This arrangement eliminates the intermediate transmission means, avoids the possibility of reduced turntable rotation accuracy due to the existence of transmission gap, ensures the processing accuracy of the product, and thus makes the turntable applicable to more parts with higher processing dimensional accuracy requirements, thereby improving the applicability of the turntable.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A turntable with high applicability, comprising a housing (1) and a fixed core shaft (2), wherein the housing (1) is covered on the outer surface of the fixed core shaft (2), characterized in that: A rotating assembly (4) is arranged inside the housing (1), and the rotating assembly (4) comprises a stator (41) and a rotor (42). The stator (41) is fixedly connected to the inner peripheral side wall of the housing (1), and the rotor (42) is rotatably arranged inside the housing (1). The inner side wall of the housing (1) is rotatably connected to a rotor fixing sleeve (44) via a turntable bearing (43). One end face of the rotor fixing sleeve (44) is fixedly connected to the rotor (42), and the other end face opposite thereto is fixedly connected to a main shaft connecting plate (3).

2. A turntable with high applicability according to claim 1, characterized in that: A brake mechanism (6) is arranged inside the housing (1), and the brake mechanism (6) comprises a brake ring assembly (61) and a drive assembly (62). The brake ring assembly (61) comprises a first brake ring (611), a second brake ring (612) and a third brake ring (613). The first brake ring (611) and the third brake ring (613) are fixedly connected to the rotor fixing sleeve (44) by bolts. The second brake ring (612) is arranged between the first brake ring (611) and the third brake ring (613). The drive assembly (62) is arranged on the fixed spindle (2). When the turntable is powered on and rotated, the drive assembly (62) makes the second brake ring (612) be in a state between the first brake ring (611) and the third brake ring (613) and not in contact with each other. When the turntable is powered off and stopped, the drive assembly (62) drives the second brake ring (612) to move toward the third brake ring (613).

3. A turntable with high applicability according to claim 2, characterized in that: The driving assembly (62) comprises a hydraulic cylinder head (621) arranged on the fixed core shaft (2), a support block (622) being arranged on the hydraulic cylinder head (621), the top surface of the support block (622) being in contact with the bottom surface of the third brake ring (613), an inner peripheral side wall of the hydraulic cylinder head (621) and an outer surface of the fixed core shaft (2) enclosing an oil chamber (7), a piston block (623) being slidably connected in the oil chamber (7), and the second brake ring (612) being fixedly connected to the third brake ring (613). On the piston block (623), a disc spring (624) is arranged in the oil chamber (7), one end of the disc spring (624) is connected to the bottom surface of the hydraulic cylinder cover (621), and the other end is connected to the piston block (623). An oil passage (21) connected to the oil chamber (7) is opened on the fixed core shaft (2), and the oil passage (21) is connected to an external hydraulic oil source. When the turntable rotates, the hydraulic oil enters the oil chamber (7) through the oil passage (21), and the disc spring (624) is compressed.

4. A turntable with high applicability according to claim 3, characterized in that: A pressure block (9) is provided on the surface of the second brake ring (612), and the pressure block (9) and the second brake ring (612) are fixedly connected to the piston block (623) by bolts. When the turntable rotates, a gap is left between the bottom surface of the pressure block (9) and the surface of the first brake ring (611).

5. A turntable with high applicability according to claim 3, characterized in that: The oil chamber (7) is in a step shape, and the outer surface of the piston block (623) is sleeved with a plurality of sealing rings (8).

6. A turntable with high applicability according to claim 2, characterized in that: The first brake ring (611), the second brake ring (612) and the third brake ring (613) are each provided with a plurality of strip grooves (10), and the strip grooves (10) are connected with chip removal holes (101). The chip removal holes (101) on the first brake ring (611) and the third brake ring (613) are arranged toward the rotor (42), and a chip removal chamber (102) is formed between the rotor (42) and the fixed core shaft (2).

7. A turntable with high applicability according to claim 1, characterized in that: The housing (1) is provided with a sealing assembly (11), the sealing assembly (11) comprising a sealing cover plate (111) and a waterproof sealing cover (112), the sealing cover plate (111) being provided on the housing (1), the waterproof sealing cover (112) being provided on the main shaft connecting plate (3), the housing (1) and the sealing cover plate (111) being provided with mutually communicating air passages (23), the air passages (23) being externally connected to positive pressure air, the sealing cover plate (111) and the main shaft connecting plate (3) A primary sealing cavity (12) is formed between the main shaft connecting plate (3) and the sealing cover plate (111), the primary sealing cavity (12) is connected to the air passage (23), a primary sealing slit (121) is formed between the main shaft connecting plate (3) and the sealing cover plate (111), a secondary sealing cavity (13) connected to the primary sealing slit (121) is formed between the sealing cover plate (111) and the waterproof sealing cover (112), and a secondary sealing slit (131) is formed between the sealing cover plate (111) and the waterproof sealing cover (112).

8. A turntable with high applicability according to claim 1, characterized in that: The sealing assembly (11) further comprises a contact seal (113) arranged between the sealing cover plate (111) and the rotor fixing sleeve (44).

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