Stage high-precision thin rotary table

Abstract

The utility model provides a stage high-precision thin rotary table, and belongs to the field of stage mechanical equipment. The rotary table comprises a rotary table frame body and wood decorations, wherein the wood decorations are arranged on the top surface and the outer side surface of the rotary table frame body; the center of the bottom of the rotary table frame body is rotationally installed on a central bottom plate through an adjustable slewing bearing assembly, an annular rotary friction disc is further fixedly arranged at the bottom of the rotary table frame body, and two sets of symmetrical servo driving devices used for driving the rotary friction disc to rotate in a friction mode are arranged on the central bottom plate in the radial direction. An annular frame body supporting belt is fixedly arranged on the periphery of the bottom of the rotary table frame body, a plurality of supporting wheel assemblies are annularly arranged below the frame body supporting belt, and each supporting wheel assembly is in rolling contact with the frame body supporting belt. The servo driving device adopts the servo speed reducer, so that the size is small, and the height of the rotary table can be effectively reduced; the rotary friction disc is driven to rotate by adopting a clamping type friction driving mode, so that the rotary table frame body stably rotates by taking the adjustable rotary supporting assembly as a center, and the friction transmission reliability of the rotary table is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of stage mechanical equipment, and particularly relates to a high-precision thin turntable for a stage. Background Art

[0002] A stage turntable is a rotatable tabletop on a stage. In stage performances, it is often necessary to rotate the tabletop to set off the protagonist and create an atmosphere, which is particularly common on large stages. With the development of technology, stage turntables are also being innovated and improved. The traditional turntable structure is relatively bulky, with poor rotational stability and difficult to control. For example, in the traditional profile roll-bending friction belt drive, the rotational speed of the turntable is unstable due to the influence of the accuracy of the roll-bending arc. Summary of the Invention

[0003] Aiming at the problems existing in the prior art in the above background art, the utility model provides a high-precision thin turntable for a stage, which has high transmission accuracy, stable rotational speed of the turntable, and is convenient for assembly.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A high-precision thin turntable for a stage includes a turntable frame body and a wooden decoration. The wooden decoration is arranged on the top surface and the outer side surface of the turntable frame body; the center of the bottom of the turntable frame body is rotatably installed on a central bottom plate through an adjustable slewing bearing assembly. A ring-shaped rotary friction disc is also fixedly arranged at the bottom of the turntable frame body. Two sets of symmetric servo drive devices for frictionally driving the rotary friction disc to rotate are radially arranged on the central bottom plate. An annular frame support belt is fixedly arranged on the outer periphery of the bottom of the turntable frame body. A plurality of support wheel assemblies are annularly arranged below the frame support belt, and each support wheel assembly is in rolling contact with the frame support belt.

[0006] Further, the adjustable slewing bearing assembly includes a slewing bearing, an upper transition plate, a lower transition plate, and a plurality of studs evenly distributed in a circumferential manner. The outer ring of the slewing bearing is fixed on the turntable frame body through the upper transition plate. The inner ring of the slewing bearing is fixedly connected with the lower transition plate. The lower ends of the studs are fixed on the central bottom plate. The studs pass upward through the lower transition plate. Locking nuts and first adjusting nuts are threadedly connected on the studs, and the locking nuts and the first adjusting nuts are respectively located on the upper and lower sides of the lower transition plate.

[0007] Further, the servo drive device includes a drive bracket, a servo reduction gear, a drive rubber-coated wheel, and an adjustable clamping force top wheel assembly. The servo reduction gear is fixed on the drive bracket. One end of the drive bracket close to the adjustable slewing bearing assembly is hinged to a support fixed on the central bottom plate. The drive rubber-coated wheel is installed on the output shaft of the servo reduction gear. The drive rubber-coated wheel is in rolling friction contact with the upper surface of the rotary friction disc; one end of the adjustable clamping force top wheel assembly close to the adjustable slewing bearing assembly is rotatably installed on the drive bracket, and the other end thereof is in rolling contact with the lower surface of the rotary friction disc.

[0008] Preferably, the adjustable clamping force top wheel assembly includes a clamping top wheel, a shaft rod, a fixing plate, a screw rod, a tension spring, a limiting piece, and a second adjusting nut. The clamping top wheel is rotatably installed at one end of the shaft rod and is in rolling contact with the lower surface of the rotary friction disc. The other end of the shaft rod is hinged to the driving bracket. The fixing plate is fixed on the driving bracket. The screw rod passes through the fixing plate downward and is movably connected to the middle part of the shaft rod. A tension spring and a limiting piece are sleeved on the screw rod. The tension spring is located between the limiting piece and the fixing plate. The second adjusting nut is threadedly connected to the screw rod, and the limiting piece is located between the tension spring and the second adjusting nut.

[0009] Furthermore, the support wheel assembly includes an outer peripheral bottom plate, a support wheel, and a first wheel frame. The support wheel is installed on the first wheel frame and is in rolling contact with the frame support belt. The first wheel frame is fixedly installed on the outer peripheral bottom plate through an adjusting cushion plate.

[0010] Furthermore, a plurality of position encoders are evenly installed on the inner wall of the wooden decoration on the outer side of the turntable frame body.

[0011] Furthermore, anti-swing top wheel assemblies are symmetrically installed on the left and right sides of the driving bracket. The anti-swing top wheel assembly includes an anti-swing top wheel and a second wheel frame. The second wheel frame is fixed on the central bottom plate. The anti-swing top wheel is installed on the second wheel frame and is in rolling contact with the driving bracket.

[0012] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0013] 1. The servo drive device provided by the present utility model adopts a servo reducer. Compared with a three-phase asynchronous reduction motor, it can achieve precise control, has a smaller volume, can effectively reduce the height of the turntable, and has a larger starting torque and stronger overload capacity.

[0014] 2. The adjustable slewing bearing assembly provided by the present utility model can realize the height adjustment and leveling of the slewing bearing through the adjustment of the first adjusting nut and the locking nut, ensuring that the assembly has a leveling function and the slewing bearing is the rotation center of the high-precision thin turntable of the stage, ensuring that the turntable does not deviate.

[0015] 3. The tails of the driving brackets of the two sets of servo drive devices provided by the present utility model are both hinged to the support. It can ensure that when the edge of the turntable frame body floats slightly, the driving rubber wheels of the servo drive device can adaptively float with the rotary friction disc and always maintain frictional contact, enhancing the reliability of frictional transmission.

[0016] 4. The servo drive device provided by the present utility model adopts a follow-up adjustable clamping force top wheel assembly. By adjusting the adjustable clamping force top wheel assembly, the clamping force between the driving rubber wheel and the rotary friction disc can be adjusted to ensure sufficient driving force for the turntable.

[0017] 5. The rotating friction disc of the present utility model is designed as an annular shape. Compared with the traditional profiled bar rolling friction belt drive, the rotation speed of the turntable is unstable due to the influence of the precision of the rolling arc. The annular rotating friction disc has a lower processing cost, a simple processing technology, and high processing precision, which can ensure high-precision transmission and stable rotation speed of the turntable.

[0018] 6. The supporting wheel assembly of the present utility model is fixed on the base surface, which greatly reduces the weight of the turntable frame. There is an adjusting shim between the first wheel frame and the outer peripheral bottom plate of the supporting wheel assembly. After the adjustable slewing bearing assembly levels the turntable frame, the adjusting shim can easily adjust the supporting wheel to be in close contact with the frame supporting belt.

[0019] 7. The present utility model can achieve double detection control of the position loop and the speed loop through the position encoder and the servo encoder of the servo reducer, ensuring the rotation precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the main sectional view of a high-precision thin turntable for a stage of the present utility model;

[0021] Figure 2 is the internal top view of a high-precision thin turntable for a stage of the present utility model;

[0022] Figure 3 is Figure 1 the layout top view of the supporting wheel assembly and the servo drive device in

[0023] Figure 4 is Figure 1 the partial enlarged view at A in

[0024] Figure 5 is Figure 1 the partial enlarged view at B in

[0025] Figure 6 is Figure 1 the structural schematic diagram of the adjustable clamping force top wheel assembly in

[0026] Figure 7 is Figure 1 the partial enlarged view at C in

[0027] Reference numerals: 1 - turntable frame body, 2 - rotary friction disc, 3 - adjustable slewing bearing assembly, 301 - slewing bearing, 302 - upper transition plate, 303 - lower transition plate, 304 - stud, 305 - locking nut, 306 - first adjusting nut, 4 - servo drive device, 401 - drive bracket, 402 - servo reducer, 403 - drive rubberized wheel, 404 - adjustable clamping force top wheel assembly, 4041 - clamping top wheel, 4042 - shaft rod, 4043 - fixing plate, 4044 - screw rod, 4045 - tension spring, 4046 - limiting piece, 4047 - second adjusting nut, 5 - frame body support belt, 6 - support wheel assembly, 601 - outer peripheral bottom plate, 602 - adjusting cushion plate, 603 - support wheel, 604 - first wheel frame, 7 - wooden decoration, 8 - position encoder, 9 - anti-sway top wheel assembly, 901 - anti-sway top wheel, 902 - second wheel frame, 10 - support, 11 - central bottom plate. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Please refer to the attached Figure 1-7 As shown, a high-precision thin turntable for a stage includes a turntable frame body 1 and a wooden decoration 7, and the wooden decoration 7 is arranged on the top surface and the outer side surface of the turntable frame body 1; the center of the bottom of the turntable frame body 1 is rotationally installed on a central bottom plate 11 through an adjustable slewing bearing 301 assembly 3, and an annular rotary friction disc 2 is fixedly arranged at the bottom of the turntable frame body 1. Two sets of symmetric servo drive devices 4 for frictionally driving the rotary friction disc 2 to rotate are radially arranged on the central bottom plate 11. An annular frame body support belt 5 is fixedly arranged on the outer periphery of the bottom of the turntable frame body 1, and a plurality of support wheel 603 assemblies 6 are annularly arranged below the frame body support belt 5, and each support wheel 603 assembly 6 is in rolling contact with the frame body support belt 5.

[0030] The present utility model drives the turntable frame body 1 to rotate around the adjustable slewing bearing 301 assembly 3 by friction through two sets of servo drive devices 4. The support wheel 603 assemblies 6 are fixed on the base surface, which greatly reduces the weight of the turntable frame body 1. The support wheel 603 assemblies 6 and the adjustable slewing bearing 301 assembly 3 jointly ensure the stable rotation of the turntable frame body 1 and prevent the turntable frame body 1 from tipping over. The circular rotary friction disc 2 has a low processing cost, a simple processing process, and high processing precision, which can ensure high-precision transmission and stable rotation speed of the turntable.

[0031] Specifically, the adjustable slewing bearing 301 assembly 3 includes a slewing bearing 301, an upper transition plate 302, a lower transition plate 303, and several studs 304 evenly distributed in a circumferential manner. The outer ring of the slewing bearing 301 is fixed to the turntable frame 1 through the upper transition plate 302. The inner ring of the slewing bearing 301 is fixedly connected to the lower transition plate 303. The lower ends of the studs 304 are fixed to the central bottom plate 11. The studs 304 pass upward through the lower transition plate 303. Locking nuts 305 and first adjusting nuts 306 are threadedly connected to the studs 304. The locking nuts 305 and the first adjusting nuts 306 are respectively located on the upper and lower sides of the lower transition plate 303.

[0032] The adjustable slewing bearing 301 assembly 3 provided by the present utility model can realize the height adjustment and leveling of the slewing bearing 301 through the adjustment of the first adjusting nut 306 and the locking nut 305, ensuring that the assembly has a leveling function and the slewing bearing 301 is the rotation center of the high-precision thin turntable of the stage, and ensuring that the turntable does not shift.

[0033] Specifically, the servo drive device 4 includes a drive bracket 401, a servo reducer 402, a drive rubber-coated wheel 403, and an adjustable clamping force top wheel assembly 404. The servo reducer 402 is fixed to the drive bracket 401. One end of the drive bracket 401 close to the adjustable slewing bearing 301 assembly 3 is hinged to the support 10 fixed on the central bottom plate 11. The drive rubber-coated wheel 403 is installed on the output shaft of the servo reducer 402, and the drive rubber-coated wheel 403 is in rolling friction contact with the upper surface of the rotary friction disc 2. One end of the adjustable clamping force top wheel assembly 404 close to the adjustable slewing bearing 301 assembly 3 is rotatably installed on the drive bracket 401, and the other end thereof is in rolling contact with the lower surface of the rotary friction disc 2. The adjustable clamping force top wheel assembly 404 includes a clamping top wheel 4041, a shaft rod 4042, a fixing plate 4043, a screw rod 4044, a tension spring 4045, a limiting piece 4046, and a second adjusting nut 4047. The clamping top wheel 4041 is rotatably installed at one end of the shaft rod 4042 and is in rolling contact with the lower surface of the rotary friction disc 2. The other end of the shaft rod 4042 is hinged to the drive bracket 401. The fixing plate 4043 is fixed to the drive bracket 401. The screw rod 4044 passes downward through the fixing plate 4043 and is movably connected to the middle part of the shaft rod 4042. The tension spring 4045 and the limiting piece 4046 are sleeved on the screw rod 4044. The tension spring 4045 is located between the limiting piece 4046 and the fixing plate 4043. The second adjusting nut 4047 is threadedly connected to the screw rod 4044. The limiting piece 4046 is located between the tension spring 4045 and the second adjusting nut 4047.

[0034] The driving rubber-coated wheel 403 of the servo drive device 4 provided in the utility model clamps the annular rotary friction disc 2 installed below the turntable frame body 1 by bolting with the clamping top wheel 4041, and drives the rotation of the turntable frame body 1 by friction. By adjusting the adjustable clamping force top wheel assembly 404, the clamping force between the driving rubber-coated wheel 403 and the rotary friction disc 2 can be adjusted to ensure sufficient driving force for the turntable. Moreover, the servo drive device 4 uses a servo reducer 402. Compared with a three-phase asynchronous reduction motor, it can achieve precise control, has a smaller volume, can effectively reduce the height of the turntable, and has a larger starting torque and stronger overload capacity. The tails of the driving brackets 401 are all hinged to the support 10, which can ensure that when the edge of the turntable frame body 1 floats slightly, the driving rubber-coated wheel 403 of the servo drive device 4 floats adaptively with the rotary friction disc 2, always maintaining frictional contact and enhancing the reliability of frictional transmission.

[0035] Specifically, the support wheel 603 assembly 6 includes an outer peripheral bottom plate 601, a support wheel 603, and a first wheel frame 604. The support wheel 603 is installed on the first wheel frame 604, the support wheel 603 is in rolling contact with the frame support belt 5, and the first wheel frame 604 is fixedly installed on the outer peripheral bottom plate 601 through an adjusting pad 602.

[0036] Specifically, in order to prevent the servo drive device 4 hinged to the support 10 from swinging left and right, anti-swing top wheel assemblies 9 are symmetrically installed on the left and right sides of the driving bracket 401. The anti-swing top wheel assembly 9 includes an anti-swing top wheel 901 and a second wheel frame 902. The second wheel frame 902 is fixed to the central bottom plate 11, the anti-swing top wheel 901 is installed on the second wheel frame 902, and the anti-swing top wheel 901 is in rolling contact with the driving bracket 401.

[0037] Specifically, a plurality of position encoders 8 are uniformly installed on the inner wall of the wooden decoration 7 on the outer side surface of the turntable frame body 1.

[0038] The utility model can realize double detection control of the position loop and the speed loop through the provided position encoder 8 and the servo encoder of the servo reducer 402 to ensure the rotation accuracy. The position encoder 8 and the servo reducer 402 are both electrically connected to an externally provided control system, which is convenient for precisely controlling the rotation process of the turntable frame body 1.

[0039] The above are the preferred embodiments of the utility model for explaining the technical solutions of the utility model. Those skilled in the art can also make conventional modifications, equivalent replacements, and improvements within the spirit and principles of the utility model. Various modifications to these embodiments will be obvious to those skilled in the art and can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein.

Claims

1. A high-precision thin turntable for a stage, comprising a turntable frame and wooden decoration, wherein the wooden decoration is arranged on the top surface and outer side surface of the turntable frame; characterized in that: The center of the bottom of the turntable frame is rotatably mounted on the central base plate through an adjustable slewing bearing assembly. An annular slewing friction disk is also fixedly provided at the bottom of the turntable frame. Two sets of symmetrical servo drive devices for frictionally driving the slewing friction disk to rotate are radially arranged on the central base plate. An annular frame support belt is fixedly provided at the outer periphery of the bottom of the turntable frame. A plurality of support wheel assemblies are arranged in an annular manner below the frame support belt, and each support wheel assembly is in rolling contact with the frame support belt.

2. The high-precision thin turntable for stage according to claim 1, characterized in that: The adjustable slewing bearing assembly includes a slewing bearing, an upper transition plate, a lower transition plate and a plurality of studs evenly distributed along the circumference. The outer ring of the slewing bearing is fixed to the turntable frame through the upper transition plate, the inner ring of the slewing bearing is fixedly connected to the lower transition plate, the lower end of the stud is fixed to the central bottom plate, the stud passes upward through the lower transition plate, the stud is threadedly connected to a locking nut and a first adjusting nut, and the locking nut and the first adjusting nut are respectively located on the upper and lower sides of the lower transition plate.

3. The high-precision thin turntable for stage according to claim 2, characterized in that: The servo drive device includes a drive bracket, a servo reducer, a drive rubber wheel, and an adjustable clamping force top wheel assembly. The servo reducer is fixed on the drive bracket, one end of the drive bracket close to the adjustable slewing bearing assembly is hinged to the support fixed on the central bottom plate, the drive rubber wheel is installed on the output shaft of the servo reducer, and the drive rubber wheel is in rolling friction contact with the upper surface of the slewing friction disk; one end of the adjustable clamping force top wheel assembly close to the adjustable slewing bearing assembly is rotatably installed on the drive bracket, and the other end thereof is in rolling contact with the lower surface of the slewing friction disk.

4. The high-precision thin turntable for stage according to claim 3, characterized in that: The adjustable clamping force top wheel assembly includes a clamping top wheel, a shaft, a fixing plate, a screw, a tensioning spring, a limiting plate, and a second adjusting nut. The clamping top wheel is rotatably mounted on one end of the shaft and is in rolling contact with the lower surface of the rotating friction disk. The other end of the shaft is hinged to the driving bracket. The fixing plate is fixed to the driving bracket. The screw passes downward through the fixing plate and is movably connected to the middle part of the shaft. A tensioning spring and a limiting plate are sleeved on the screw. The tensioning spring is located between the limiting plate and the fixing plate. The second adjusting nut is threadedly connected to the screw, and the limiting plate is located between the tensioning spring and the second adjusting nut.

5. The high-precision thin turntable for stage according to claim 1, characterized in that: The support wheel assembly includes an outer peripheral bottom plate, a support wheel, and a first wheel frame. The support wheel is installed on the first wheel frame. The support wheel is in rolling contact with the frame support belt. The first wheel frame is fixedly installed on the outer peripheral bottom plate by adjusting a pad.

6. The high-precision thin turntable for stage according to claim 1, characterized in that: A plurality of position encoders are evenly installed on the inner wall of the wooden decoration located on the outer side of the turntable frame.

7. The high-precision thin turntable for stage according to claim 3, characterized in that: The anti-sway top wheel assembly is symmetrically installed on the left and right sides of the driving bracket. The anti-sway top wheel assembly includes an anti-sway top wheel and a second wheel frame. The second wheel frame is fixed to the central bottom plate, and the anti-sway top wheel is installed on the second wheel frame. The anti-sway top wheel is in rolling contact with the driving bracket.

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