High-precision heavy-load horizontal rotary table

Abstract

The high-precision heavy-load horizontal rotary table comprises a base, a mounting plate is fixedly connected to the upper end face of the base, an opening is formed in the middle of the upper end face of the mounting plate, a fixing ring is fixedly connected to the middle of the upper end face of the mounting plate, and the fixing ring is sleeved with a supporting ring; sliding supporting devices are evenly arranged on the lower end face of the supporting ring, a driven gear is fixedly connected to the outer wall of the supporting ring, a bearing penetrates through the rear portion of the right side of the upper end face of the mounting plate, a fixing shaft is fixedly connected to an inner ring of the bearing, and a driving gear is fixedly connected to the upper end face of the fixing shaft. The lower end of the fixing shaft is movably connected to the bottom end face of an inner cavity of the base, a driving device is arranged on the right side of the lower portion of the inner cavity of the base and movably connected with the fixing shaft, a rotary disc is fixedly connected to the upper end face of the supporting ring, the device is simple in structure and convenient to operate, and the precision and the bearing strength of the rotary platform are effectively improved.

Description

Technical Field

[0001] The present disclosure specifically discloses a technical field of rotary tables, and particularly relates to a high-precision heavy-duty horizontal rotary table. Background Art

[0002] With the entry of robots into people's sight, the manufacturing of robot-assisted devices has become increasingly perfect. Various platform fixtures appear in robot-assisted devices. Their appearance is to improve the working efficiency and working ability of robots. The traditionally used horizontal rotary table device includes a rotary platform, a combination of a motor and a reducer, and a base. The connecting flange of the combination of the motor and the reducer is fixedly connected to the base, and the output shaft of the rotary platform is directly connected to the combination of the motor and the reducer, resulting in low precision of the traditional horizontal rotary table.

[0003] According to Application No. 201620253464.8, a high-precision and high-load horizontal rotary table is disclosed, which includes a base and a rotary disk arranged on the base. A slewing bearing mounting plate is arranged above the rotary disk base, and a slewing bearing is fixed on the slewing bearing mounting plate. The slewing bearing includes a slewing bearing gear, a slewing bearing fixed ring, and rolling elements connecting the slewing bearing gear and the slewing bearing fixed ring; a power device is arranged in the base, and the power device is connected to the rotary disk through the slewing bearing gear. The power device includes a driving gear, the driving gear is fixed below the rotary disk through a gear baffle and meshes with the slewing bearing gear, the driving gear is connected to a reducer through a reducer output shaft arranged below the gear, and the reducer is connected to a motor through a reducer input shaft.

[0004] The existing horizontal rotary table reduces the rotation speed of the slewing bearing fixed ring through the cooperation of the driving gear and the reducer motor shaft. Moreover, no rolling device is arranged on the lower end face of the existing slewing bearing fixed ring, resulting in the reduction of the power of the slewing bearing fixed ring due to friction. In addition, the existing driving device uses a servo motor in cooperation with the driving gear, which is not suitable for the design and manufacture of various medium-low speed and medium-high load numerical control turntables, resulting in low machining precision. Therefore, we propose a high-precision heavy-duty horizontal rotary table. Summary of the Invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, the present application aims to provide a structure with high precision and a support sliding device.

[0006] A high-precision heavy-duty horizontal turntable, comprising a base, an installation plate is fixedly connected to the upper end surface of the base, an opening is formed in the middle of the upper end surface of the installation plate, a fixed ring is fixedly connected to the middle of the upper end surface of the installation plate, the inner wall of the inner ring of the fixed ring is flush with the inner wall of the opening cavity, a support ring is sleeved outside the fixed ring, sliding support devices are uniformly arranged on the lower end surface of the support ring, a driven gear is fixedly connected to the outer wall of the support ring, a bearing is penetrated and arranged at the rear part on the right side of the upper end surface of the installation plate, a fixed shaft is fixedly connected to the inner ring of the bearing, a driving gear is fixedly connected to the upper end surface of the fixed shaft, the driving gear is meshed with the driven gear, the lower end of the fixed shaft is movably connected to the bottom end surface of the inner cavity of the base, a driving device is arranged on the lower right side of the inner cavity of the base, the driving device is movably connected to the fixed shaft, and a turntable is fixedly connected to the upper end surface of the support ring.

[0007] According to the technical solution provided by the embodiment of the present application, the driving device includes a fixing plate, a rotating shaft, a worm, a worm wheel and a reduction motor. The reduction motor is fixedly connected to the lower part of the right end surface of the base. The motor shaft of the reduction motor penetrates and extends into the inner cavity of the base and is fixedly connected to the worm. The rotating shaft is fixedly connected to the left end surface of the worm. A fixing plate is longitudinally fixedly connected to the middle of the bottom end surface of the inner cavity of the base. The end of the rotating shaft is movably connected to the right end surface of the fixing plate. A worm wheel is fixedly connected to the lower part of the outer part of the fixed shaft. The worm wheel is meshed with the worm.

[0008] According to the technical solution provided by the embodiment of the present application, the sliding support device includes a limiting groove, a connecting seat and a roller. A limiting groove is formed in the outer part of the upper end surface of the installation plate. Connecting seats are uniformly fixedly connected to the lower end surface of the support ring. A roller is movably connected to the inner cavity of the connecting seat. The roller is located inside the limiting groove.

[0009] According to the technical solution provided by the embodiment of the present application, the limiting groove is in a V-shaped structure, the limiting groove is matched with the roller, there are twelve groups of rollers, and the twelve groups of rollers are arranged in a circular array on the lower end surface of the support ring.

[0010] According to the technical solution provided by the embodiment of the present application, counterbores are uniformly formed in the upper end surface of the turntable, the counterbores correspond to the threaded holes on the upper end surface of the support ring, and locking bolts are arranged in the inner cavities of the counterbores.

[0011] According to the technical solution provided by the embodiment of the present application, arc-shaped grooves are formed in both the outer wall of the fixed ring and the inner wall of the support ring, spheres are arranged in the inner cavities of the arc-shaped grooves, and the spheres are matched with the arc-shaped grooves.

[0012] In summary, the present application discloses a high-precision heavy-duty horizontal turntable.

[0013] Beneficial effects:

[0014] 1. Through a driving device, a fixed shaft, bearings, a driving gear, and a driven gear, a combined worm and worm gear transmission method is adopted to achieve backlash-free transmission between the fixed shaft and the worm. On the basis of ensuring the transmission accuracy, a large transmission ratio is obtained to meet the requirements of a small backlash, adjustable backlash, and a large-load rotating disk, with the advantages of strong load-bearing capacity, high transmission accuracy, zero backlash, and low noise.

[0015] 2. Through an arc-shaped groove, a sphere, and a sliding support device, by the cooperation of the arc-shaped groove and the sphere, a gap is ensured between the support ring and the fixed ring, while ensuring normal rotation and reducing friction. By the cooperation of the roller and the limit groove, it is ensured that the support ring does not fit the mounting plate, greatly reducing friction and at the same time having a supporting force, making the horizontal turntable have a strong anti-overload capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects, and advantages of the present application will become more apparent:

[0017] Figure 1 is a schematic diagram of the high-precision heavy-duty horizontal turntable in the present application;

[0018] Figure 2 is a schematic diagram of the lower structure of the high-precision heavy-duty horizontal turntable in the present application;

[0019] Figure 3 is a schematic sectional view of the high-precision heavy-duty horizontal turntable in the present application;

[0020] Figure 4 is in the present application Figure 2 is an enlarged schematic view of part A in the

[0021] In the figure: 1. Base; 2. Mounting plate; 3. Rotating disk; 4. Counterbore; 5. Locking bolt; 6. Driving device; 61. Fixed plate; 62. Rotating shaft; 63. Worm; 64. Worm wheel; 65. Reducing motor; 7. Opening; 8. Fixed ring; 9. Support ring; 10. Driven gear; 11. Driving gear; 12. Bearing; 13. Arc-shaped groove; 14. Sphere; 15. Fixed shaft; 16. Limit groove; 17. Connecting seat; 18. Roller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the present application in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related invention and are not intended to limit the invention. Additionally, it should be noted that for the sake of description, only the parts related to the invention are shown in the drawings.

[0023] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0024] As mentioned in the background art, in the prior art, the horizontal turntable reduces the rotation speed of the fixed ring of the slewing bearing through the cooperation of the driving gear and the reduction motor shaft. Moreover, there is no rolling device provided on the lower end surface of the existing fixed ring of the slewing bearing, resulting in a reduction in the power of the fixed ring of the slewing bearing due to friction. In addition, the existing driving device uses a servo motor in cooperation with the driving gear, which is not suitable for the design and manufacture of various medium-low speed and medium-high load CNC turntables, leading to low machining accuracy. The present disclosure proposes a structure with high precision and a supporting sliding device.

[0025] Embodiment 1

[0026] Please refer to Figure 1 , a high-precision heavy-duty horizontal turntable, including a base 1. The base 1 is a groove device with the groove facing upwards, ensuring the convenient installation of the internal driving device 6. For the convenient installation of the exhibition disc 3, a mounting plate 2 is fixedly connected to the upper end surface of the base 1. The mounting plate 2 is a square structure and has an area larger than the upper end surface of the base 1. An opening 7 is provided in the middle of the upper end surface of the mounting plate 2. A fixed ring 8 is fixedly connected to the middle of the upper end surface of the mounting plate 7. The inner wall of the inner ring of the fixed ring 8 is flush with the inner wall of the inner cavity of the opening 7, facilitating the welding of the fixed ring 8 to the upper end surface of the mounting plate 2 and effectively ensuring the stability of the fixed ring 8.

[0027] Please refer to Figure 2 and Figure 3 , to ensure that the support ring 9 can move in a circular motion normally, a support ring 9 is sleeved outside the fixed ring 8. To ensure that the support ring 9 does not rub against the mounting plate 2, a sliding support device is evenly arranged on the lower end surface of the support ring 9. To ensure that the support ring 9 can rotate, a driven gear 10 is fixedly connected to the outer wall of the support ring 9. A bearing 12 is penetrated through the right rear part of the upper end surface of the mounting plate 2. A fixed shaft 15 is fixedly connected to the inner ring of the bearing 12. A driving gear 11 is fixedly connected to the upper end surface of the fixed shaft 15. The driving gear 11 meshes with the driven gear 10. The lower end of the fixed shaft 15 is movably connected to the bottom end surface of the inner cavity of the base 1. A driving device 6 is arranged on the lower right side of the inner cavity of the base 1, and the driving device 6 is movably connected to the fixed shaft 15. To ensure that larger or heavier workpieces can be rotated and machined on the platform, a turntable 3 is fixedly connected to the upper end surface of the support ring 9, and the diameter of the turntable 3 is larger than the diagonal of the mounting plate 2.

[0028] Please refer to Figure 3, in order to improve the transmission accuracy, obtain a larger transmission ratio on the basis of ensuring the transmission accuracy to meet the requirements of a small backlash, adjustable backlash and large-load CNC turntables, a drive device 6 is composed of a fixing plate 61, a rotating shaft 62, a worm 63, a worm gear 64 and a reduction motor 65. A reduction motor 65 is fixedly connected to the lower part of the right end face of the base 1, and the motor shaft of the reduction motor 65 penetrates and extends into the inner cavity of the base 1 and is fixedly connected to a worm 63. A rotating shaft 62 is fixedly connected to the left end face of the worm 63. A fixing plate 61 is longitudinally and fixedly connected to the middle of the bottom end face of the inner cavity of the base 1, and the end of the rotating shaft 62 is movably connected to the right end face of the fixing plate 61. In order to drive the fixed shaft 15 to rotate, a worm gear 64 is fixedly connected to the lower part of the outside of the fixed shaft 15, and the worm gear 64 meshes with the worm 63. The reduction motor 65 drives the worm 63 to rotate, the worm 63 drives the worm gear 64 to rotate, and the worm gear 64 drives the fixed shaft 15 to rotate.

[0029] Please refer to Figure 2 and Figure 4 , in order to ensure that the support ring 9 does not rub against the mounting plate 2 and does not consume a large torque force, and at the same time has a supporting effect on the support ring 9, a sliding support device is composed of a limiting groove 16, a connecting seat 17 and a roller 18. A limiting groove 16 is opened on the outside of the upper end face of the mounting plate 2, and the limiting groove 16 is annular. Connecting seats 17 are evenly and fixedly connected to the lower end face of the support ring 9. A roller 18 is movably connected to the inner cavity of the connecting seat 17, and the roller 18 is located inside the limiting groove 16.

[0030] Please refer to Figure 3 , in order to ensure that the roller 18 will not get stuck inside the limiting groove 16 when rolling, the limiting groove 16 is of a V-shaped structure, and the outer ring cross-section of the roller 18 is also of a V-shaped structure to ensure that the limiting groove 16 matches the roller 18. There are twelve groups of rollers 18, and the twelve groups of rollers 18 are arranged in an annular array on the lower end face of the support ring 9 to ensure that the support ring 9 can make a stable and normal circular motion under the drive of the driving gear 11.

[0031] Please refer to Figure 1 , in order to facilitate the replacement of the turntable 3, counterbores 4 are evenly opened on the upper end face of the turntable 3, and the counterbores 4 correspond to the threaded holes on the upper end face of the support ring 9. A locking bolt 5 is arranged in the inner cavity of the counterbore 4. In order to facilitate the screwing out of the locking bolt 5, an internal hexagonal groove is opened in the middle of the upper end face of the locking bolt 5 to facilitate the disassembly and assembly of the turntable 3.

[0032] Embodiment 2

[0033] Please refer to Figure 3, in order to further ensure that the torque force will not decrease due to friction, arc-shaped grooves 13 are provided on the outer wall of the fixed ring 8 and the inner wall of the support ring 9, and the inner arc-shaped groove 13 and the outer arc-shaped groove 13 correspond to each other. A sphere 14 is installed in the inner cavity of the arc-shaped groove 13, and the sphere 14 matches the arc-shaped groove 13 to ensure that the support ring 9 can rotate normally.

[0034] Working principle: During use, the workpiece to be processed is placed on the upper end surface of the rotary disk 3. Using an external power source, the reduction motor 65 is started. The reduction motor 65 drives the worm 43 to rotate. The rotation of the worm 63 drives the worm gear 64 to rotate. The rotation of the worm gear 64 drives the fixed shaft 15 to rotate, thereby driving the driving gear 11 to rotate. The driving gear 11 meshes with the driven gear 10 to drive the driven gear 10 to rotate, and further drives the support ring 9 to perform a circular motion. In order to ensure the stability of the support ring 9, the rotation of the support ring 9 drives the roller 18 to perform a circular motion inside the limit groove 16. Through the sliding support device, the stability of the rotary disk 3 is further ensured.

[0035] The above description is only the preferred embodiment of the present application and the explanation of the applied technical principle. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by mutually replacing the above features with the (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A high-precision heavy-load horizontal turntable, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixedly connected to a mounting plate (2), an opening (7) is provided in the middle of the upper end surface of the mounting plate (2), a fixing ring (8) is fixedly connected in the middle of the upper end surface of the mounting plate (2), the inner wall of the inner circle of the fixing ring (8) is flush with the inner wall of the inner cavity of the opening (7), a supporting ring (9) is sleeved on the outside of the fixing ring (8), a sliding supporting device is evenly provided on the lower end surface of the supporting ring (9), a driven gear (10) is fixedly connected to the outer wall of the supporting ring (9), and the rear right portion of the upper end surface of the mounting plate (2) penetrates A bearing (12) is provided, the inner ring of the bearing (12) is fixedly connected to a fixed shaft (15), the upper end surface of the fixed shaft (15) is fixedly connected to a driving gear (11), the driving gear (11) is meshed with a driven gear (10), the lower end of the fixed shaft (15) is movably connected to the bottom end surface of the inner cavity of the base (1), a driving device (6) is provided on the right side of the lower part of the inner cavity of the base (1), the driving device (6) is movably connected to the fixed shaft (15), and the upper end surface of the support ring (9) is fixedly connected to a rotating disk (3).

2. A high-precision heavy-load horizontal turntable according to claim 1, characterized in that: The driving device (6) comprises a fixed plate (61), a rotating shaft (62), a worm (63), a worm wheel (64) and a reduction motor (65); the reduction motor (65) is fixedly connected to the lower part of the right end surface of the base (1); the motor shaft of the reduction motor (65) extends through the inner cavity of the base (1) and is fixedly connected to the worm (63); the left end surface of the worm (63) is fixedly connected to the rotating shaft (62); the middle part of the bottom end surface of the inner cavity of the base (1) is longitudinally fixedly connected to the fixed plate (61); the end of the rotating shaft (62) is movably connected to the right end surface of the fixed plate (61); the lower part of the outer portion of the fixed shaft (15) is fixedly connected to the worm wheel (64); the worm wheel (64) is meshed with the worm (63).

3. A high-precision heavy-load horizontal turntable according to claim 2, characterized in that: The sliding support device comprises a limiting groove (16), a connecting seat (17) and a roller (18); the limiting groove (16) is provided on the outer portion of the upper end surface of the mounting plate (2); the connecting seat (17) is evenly and fixedly connected to the lower end surface of the support ring (9); the inner cavity of the connecting seat (17) is movably connected to the roller (18); and the roller (18) is located inside the limiting groove (16).

4. The high-precision heavy-load horizontal turntable according to claim 3 is characterized in that: The limiting groove (16) is of a V-shaped structure, and the limiting groove (16) matches the roller (18). Twelve groups of the rollers (18) are provided, and the twelve groups of the rollers (18) are arranged in a ring array on the lower end surface of the support ring (9).

5. The high-precision heavy-load horizontal turntable according to claim 1, characterized in that: The upper end surface of the rotary disk (3) is evenly provided with countersunk holes (4), the countersunk holes (4) correspond to the threaded holes on the upper end surface of the support ring (9), and the inner cavity of the countersunk holes (4) is provided with locking bolts (5).

6. The high-precision heavy-load horizontal turntable according to claim 1, characterized in that: The outer wall of the fixing ring (8) and the inner wall of the supporting ring (9) are both provided with an arc-shaped groove (13), the inner cavity of the arc-shaped groove (13) is provided with a sphere (14), and the sphere (14) matches the arc-shaped groove (13).

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