Positioning and locking structure of servo turntable and servo turntable

Abstract

The invention discloses a positioning and locking structure of a servo rotary table and the servo rotary table. The positioning and locking structure comprises a rotary table top, a supporting frame, a power assembly, a positioning assembly and at least one locking assembly. The power assembly comprises a rotating shaft, and the rotating shaft is sleeved with the rotating table top. The power assembly is configured to drive the rotary table top to rotate through the rotary shaft. The supporting frame is arranged below the rotary table top. The positioning assembly comprises a positioning parent part and at least one positioning child part, and the positioning parent part can move in the direction perpendicular to the table top of the rotary table, so that the positioning parent part ascends to be connected with or separated from the positioning child part in a matched mode; the locking assembly comprises a locking mother piece and a locking son piece, and the locking son piece and the locking mother piece are matched to lock and fix or loosen and release the rotary table top and the supporting frame. According to the positioning and locking structure of the servo rotary table and the servo rotary table, the problems that in the prior art, a servo rotary table is complex in positioning and locking and low in reliability can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of workpiece processing and manufacturing, and particularly relates to a positioning and locking structure of a servo turntable and a servo turntable. Background Art

[0002] A servo turntable is a high-precision motion control device, which is widely used in the fields of industrial automation, aerospace, precision machining, etc. The servo turntable is driven by a servo motor to achieve precise angle, speed, and position control.

[0003] The turntable of a groove grinding machine is a type of servo turntable, which is the core component of a groove grinding machine and is mainly used for precision grinding of workpieces, especially widely used in the manufacturing of precision parts such as bearings and gears. The turntable of the groove grinding machine drives the workpiece to rotate for grinding through rotation, and is usually equipped with high-precision bearings and a drive system to ensure machining accuracy and stability.

[0004] The turntable of the groove grinding machine generally includes a turntable body, a drive system, a bearing system, a fixture system, and a control system. Among them, the turntable body is used to carry the workpiece and is usually made of high-strength materials; the drive system mainly includes a motor and a reduction mechanism to drive the turntable body to provide smooth rotation; the bearing system includes high-precision bearings to support the turntable and ensure rotation accuracy; the fixture system is used to fix the workpiece on the turntable body to ensure machining stability; the control system is used to control the rotation speed and position to achieve automated machining.

[0005] The turntable of the groove grinding machine is a high-precision heavy-duty structure. The tabletop diameter of its turntable body can reach 1200 mm, the weight can reach 300 kg, and the load capacity of the turntable body can reach more than 800 kg. Generally, several processing stations are set on the tabletop of the turntable of the groove grinding machine, and the workpiece to be processed is placed on the processing station. When the groove grinding machine starts to work, the turntable rotates to make the workpiece on the processing station rotate to a predetermined position, and then the turntable needs to be positioned and locked so that the processing station accurately stops at the predetermined position and is locked. Then, the workpiece is processed. After the processing is completed, the turntable is released from the locked state, and then the turntable rotates to quickly make the next processing station rotate to the predetermined position, and then the above operation is repeated to process the workpiece at the next processing station.

[0006] During the working process of the groove grinding machine, when switching between different processing stations, the rotation time of the turntable body within a 90-degree range is less than 2 seconds, and the inertial kinetic energy is very large. Moreover, the positioning accuracy requirement of the turntable tabletop is very high, which needs to be within the range of ±5 arcseconds, and the repeatability accuracy shall not exceed the range of ±2 arcseconds. Under this requirement, the turntable tabletop needs to quickly and accurately reach the position and be accurately positioned and locked to ensure the subsequent machining accuracy. At the same time, the turntable also needs to be able to withstand the machining force impacts in all directions during machining.

[0007] The Chinese patent application with the publication number CN116571780A discloses a high-precision multi-groove grinding wheel hole processing assembly. In its solution, a positioning assembly is set up to position the multi-groove grinding wheel, and then the multi-groove grinding wheel is clamped by a clamping assembly. However, in its solution, the positioning assembly needs to lift the multi-groove grinding wheel every time it positions the multi-groove grinding wheel, and then transfer it to the clamping assembly for clamping. The operation is cumbersome, time-consuming and laborious. Moreover, the structural designs of the clamping assembly and the positioning assembly in its solution are relatively complex.

[0008] Therefore, for the positioning and locking of the servo turntable, a more simple, efficient and reliable structure needs to be proposed. Summary of the Invention

[0009] The purpose of the present invention is to provide a positioning and locking structure for a servo turntable and a servo turntable, so as to solve the problems of complex positioning and locking of the servo turntable and low reliability in the prior art.

[0010] To achieve the above purpose, the present invention provides a positioning and locking structure for a servo turntable, including a turntable table surface, a support frame, a power assembly, a positioning assembly and at least one locking assembly; the power assembly includes a rotating shaft, and the turntable table surface is sleeved and connected to the rotating shaft; the power assembly is configured to drive the turntable table surface to rotate through the rotating shaft; the support frame is arranged below the turntable table surface; the positioning assembly includes a positioning female part and at least one positioning male part, the positioning female part is arranged on the support frame, the positioning male part is arranged on the lower surface of the turntable table surface, and the positioning female part can move in a direction perpendicular to the turntable table surface, so that the positioning female part rises to be cooperatively connected with the positioning male part, or the positioning female part descends to be separated from the positioning male part; the locking assembly includes a locking female part and a locking male part, the locking female part is arranged on the support frame, the locking male part is arranged on the lower surface of the turntable table surface, and the locking male part cooperates with the locking female part to lock and fix or release and release the turntable table surface and the support frame.

[0011] Further, the number of the positioning male parts is at least 4, and the 4 positioning male parts are equally distributed circumferentially on the lower surface of the turntable table surface.

[0012] Further, the positioning female part includes a positioning pin, the positioning male part includes a plunger, an opening matching the plunger is opened on the lower surface of the turntable table surface, the plunger is fixedly arranged in the opening, a conical hole matching the head of the positioning pin is opened on the lower surface of the plunger close to the support frame, and the positioning pin is inserted into the conical hole when it rises.

[0013] Further, when the positioning pin rises to the highest point, it is in interference fit connection with the tapered hole, and the contact area between the two is greater than 70%.

[0014] Further, the cylindricity of the positioning pin is less than or equal to 0.005 mm.

[0015] Further, the tail of the positioning pin is connected to a hydraulic cylinder, and the hydraulic cylinder drives the movement of the positioning pin.

[0016] Further, the number of the locking assemblies is more than 3.

[0017] Further, the locking sub-component includes a driving member, a pressing plate and a base; the locking mother-component includes a bottom plate; a locking opening is formed on the lower surface of the turntable tabletop, and the driving member is arranged in the locking opening; the base is fixed on the lower surface of the turntable tabletop and is close to the locking opening; the pressing plate is hingedly arranged on the base; the driving member is configured to drive one end of the pressing plate to move so that the other end of the pressing plate contacts and presses against the bottom plate.

[0018] Further, the driving member is a hydraulic cylinder, and the piston of the hydraulic cylinder extends to drive one end of the pressing plate to move.

[0019] The present invention also provides a servo turntable, including the positioning and locking structure of the servo turntable as described above.

[0020] In summary, for the positioning and locking structure of the servo turntable provided by the present invention, both the positioning component and the locking component are arranged at the lower surface of the turntable tabletop, and will not have an adverse impact on the workpiece processing on the upper surface of the turntable tabletop.

[0021] The setting of the positioning component and the locking component can achieve the precise positioning of the turntable tabletop, and can realize the reliable locking between the turntable tabletop and the support frame, ensuring the machining accuracy.

[0022] The hydraulic cylinder pipelines of the positioning component and the locking component are both hidden inside the tabletop or the support frame, with high integration and minimizing the interference to other structures to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a color structure schematic diagram of a servo turntable provided by an embodiment of the present invention;

[0024] Figure 2 It is a line structure schematic diagram of a servo turntable provided by an embodiment of the present invention;

[0025] Figure 3 It is a plane structure schematic diagram of a servo turntable provided by an embodiment of the present invention;

[0026] Figure 4 An enlarged schematic view of part A of a positioning component of a servo turntable provided by an embodiment of the present invention when not positioned;

[0027] Figure 5 An enlarged schematic view of part A of a positioning component of a servo turntable provided by an embodiment of the present invention when positioned;

[0028] Figure 6 An enlarged schematic view of part B of a locking component of a servo turntable provided by an embodiment of the present invention when not locked;

[0029] Figure 7 An enlarged schematic view of part B of a locking component of a servo turntable provided by an embodiment of the present invention when locked;

[0030] Among them, the reference numerals are explained as follows:

[0031] 10 - turntable tabletop; 20 - support frame; 30 - power component; 40 - positioning component; 50 - locking component; 31 - servo motor; 32 - reduction mechanism; 33 - rotating shaft; 41 - positioning female part; 42 - positioning male part; 51 - locking female part; 52 - locking male part; 411 - positioning pin; 421 - plunger; 4211 - tapered hole; 511 - bottom plate; 521 - driving part; 522 - pressing plate; 523 - base. Detailed implementation manners

[0032] The following will describe the positioning and locking structure of the servo turntable and the servo turntable proposed by the present invention in more detail with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present invention.

[0033] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0034] In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] Figure 1 and Figure 2 are schematic views of a servo turntable provided by the present invention, as Figure 1 and Figure 2As shown in the figure, the servo turntable includes a turntable tabletop 10, a support frame 20, and a power assembly 30. The power assembly 30 generally includes a servo motor 31 and a speed reduction mechanism 32. The output shaft of the servo motor 31 is output to a rotating shaft 33 after being decelerated by the gear set of the speed reduction mechanism 32. The rotating shaft 33 drives the turntable tabletop 10 to rotate. The support frame 20 is generally sleeved outside the gear set of the speed reduction mechanism 32 but is not connected or in contact with the speed reduction mechanism 32, that is, the support frame 20 remains fixed and does not affect the rotation of the speed reduction mechanism 32 and the turntable tabletop 10. Several processing stations are designed on the turntable tabletop 10. On the turntable tabletop of a groove grinding machine, generally about 4 processing stations are designed and are evenly distributed along the circumferential direction. When the workpiece is processed at one processing station, the turntable tabletop 10 is fixed to the support frame 20. After the processing is completed, the turntable tabletop 10 is separated from the support frame 20, and the turntable tabletop 10 quickly rotates to make the next station reach the predetermined position to prepare for processing the workpiece at the next station.

[0036] In the solution of the present invention, a positioning and locking structure of a servo turntable is provided, which includes a turntable tabletop 10, a support frame 20, a power assembly 30, a positioning assembly 40, and at least one locking assembly 50; the power assembly 30 includes a rotating shaft 33, and the turntable tabletop 10 is sleeved and connected to the rotating shaft 33; the power assembly 30 is configured to drive the turntable tabletop 10 to rotate through the rotating shaft 33; the support frame 20 is arranged below the turntable tabletop 10; the positioning assembly 40 includes a positioning female part 41 and at least one positioning male part 42. The positioning female part 41 is arranged on the support frame, and the positioning male part 42 is arranged on the lower surface of the turntable tabletop 10. The positioning female part 41 can move in a direction perpendicular to the turntable tabletop 10 so that the positioning female part 41 rises to cooperate and connect with the positioning male part 42, or the positioning female part 41 descends to separate from the positioning male part 42; the locking assembly 50 includes a locking female part 51 and a locking male part 52. The locking female part 51 is arranged on the support frame 20, and the locking male part 52 is arranged on the lower surface of the turntable tabletop 10. The locking male part 52 cooperates with the locking female part 51 to lock and fix or release the turntable tabletop 10 and the support frame 20.

[0037] In the technical solution provided by the present invention, when the turntable tabletop 10 is in place, the turntable tabletop 10 can be accurately positioned through the positioning assembly 40 to prevent it from rotating around the axis, ensuring the positioning accuracy of the rotating tabletop 10; at the same time, when the positioning assembly 40 accurately positions the turntable tabletop 10, the rotating tabletop 40 can be locked and fixed on the support frame 20 through the locking assembly 50, restricting the movement of the rotating tabletop 40 during the subsequent workpiece processing, so that the position of the workpiece remains unchanged during processing, improving the processing accuracy of the workpiece.

[0038] As a preferred solution of the present invention, the number of the positioning sub-components 42 includes at least 4, and the 4 positioning sub-components 42 are equally distributed along the circumferential direction on the lower surface of the turntable table 10. Generally speaking, the processing stations on the surface of most servo machines such as slot grinders are about 4, which means that the turntable table will rotate 4 times during a processing cycle, so that the 4 processing stations will stop at the designated positions in turn to process the workpiece. Correspondingly, the number of positioning sub-components 42 can also be set to more than 4. When a processing station of the rotating table 10 is rotated to the designated position, the positioning mother component 41 cooperates with a corresponding positioning sub-component 42 to position the turntable table 10. The specific setting position of the positioning sub-component 42 is not limited in the solution of the present invention. It can be set below the corresponding processing station or staggered at a certain angle with the corresponding processing station.

[0039] like Figures 1 to 7 As shown, as an implementation of the present invention, the positioning mother component 41 includes a positioning pin 411, the positioning subcomponent 42 includes a plunger 421, an opening matching the plunger 421 is provided on the lower surface of the turntable table 10, the plunger 421 is fixedly arranged in the opening, and a tapered hole 4211 matching the head of the positioning pin 411 is provided on the lower surface of the plunger 421 close to the support frame 20, and the positioning pin 411 is inserted into the tapered hole 4211 when it rises. Preferably, when the positioning pin 411 rises to the highest point, it is connected with the tapered hole 4211 by interference fit, and the contact area between the two is greater than 70%. During the positioning process of the turntable table 10, when the turntable table 10 rotates into place, the positioning pin 411 will rise under the drive of external force, wherein the tail of the positioning pin 411 can be connected to a hydraulic cylinder, and the hydraulic cylinder provides driving force to drive the positioning pin 411 to move up and down, and the hydraulic pipeline of the hydraulic cylinder can be hidden inside the support frame 20, which improves the integration on the one hand and avoids affecting the movement of the turntable table 10 on the other hand. The positioning pin 411 rises and inserts into the tapered hole 4211 of the plunger 421. When it rises to the highest point, the two are connected by interference fit, completing the positioning process and limiting the axial rotation of the turntable table 10. Among them, the shape of the plunger 421 is not limited in the scheme of the present invention, and it can be a cylindrical shape or a T-shaped plunger. In the scheme of the present invention, the plunger can preferably be a T-shaped plunger. An opening matching the shape of the plunger 421 is opened on the lower surface of the turntable table 10, and then the plunger 421 is placed and fixed in the opening. Then, a tapered hole 4211 matching the head of the positioning pin 411 is opened on the lower surface of the plunger 421. The positioning pin 411 cooperates with the tapered hole 4211 to realize the positioning of the turntable table 10.

[0040] In a preferred embodiment of the present invention, the positioning pin 411 is a quenched part with a cylindricity accuracy of ≤0.005 mm, and its head is conical. Openings are machined on the lower surface of the turntable table 10 according to the number of positioning sub-pieces 42. For example, 4 openings are machined, and the 4 openings are equally circumferentially distributed. Then, taper holes are machined on the lower surface of the plunger 421 with a machining accuracy of 0.05 mm and a positional tolerance of not more than 0.04 mm. A machining allowance of 0.03 - 0.08 mm is reserved for the taper holes during machining for subsequent further grinding. Then, the plunger 421 is installed in the opening, and the lower surface of the plunger 421 is ground with the head of the positioning pin 411 as the male head until the contact area between the two is greater than 70%, thus completing the machining of the taper hole 4211.

[0041] As an implementation solution of the present invention, the number of the locking assemblies 50 is more than 3, that is, the locking and fixing between the turntable table 10 and the support frame 20 is realized by means of a three-point positioning surface. Preferably, the locking assemblies 50 are equally circumferentially distributed along the turntable table 10.

[0042] Among them, the locking sub-piece 52 includes a driving member 521, a pressing plate 522 and a base 523. The locking sub-piece 52 can be arranged on the lower surface of the turntable table 10 near the edge portion of the turntable table 10; the locking mother-piece 51 includes a bottom plate 511, such as Figure 3 、 Figure 6 and Figure 7As shown, the bottom plate 511 can be arranged on the outer wall of the support frame 20. Of course, the bottom plate 511 can also be of other structures. For example, it can be an annular component arranged along the circumferential direction of the support frame 20, etc.; a locking opening is formed on the lower surface of the turntable tabletop 10, and the driving member 521 is arranged in the locking opening; the base 523 is fixed on the lower surface of the turntable tabletop 10 and is close to the locking opening; the pressing plate 522 is hinged on the base 523; the driving member 521 is configured to drive one end of the pressing plate 522 to move, so that the other end of the pressing plate 522 contacts and presses against the bottom plate 511. In the solution of the present invention, the driving member 521 can drive one end of the pressing plate 522 to move downward. Since the pressing plate 522 is hinged on the base 523, under the lever principle, the other end of the pressing plate 522 will rise and abut against the bottom plate 511. With the continuous external force provided by the driving member 521, the other end of the pressing plate 522 can be tightly abutted and pressed against the bottom plate 511, so as to lock and fix the turntable tabletop 10 and the support frame 20. Preferably, a groove can be formed on the lower surface of the bottom plate 511, and the shape of the other end of the pressing plate 522 is designed to match the shape of the groove. In this way, when the other end of the pressing plate 522 moves upward, it can just be stuck in the groove. Under the action of the continuous external force, the pressing plate 522 can be better pressed against the bottom plate 511, preventing the relative movement between the turntable tabletop 10 and the support frame 20 caused by the misalignment of the two.

[0043] Preferably, the driving member 521 can be a hydraulic cylinder, such as a small-angle hydraulic cylinder. The hydraulic pipeline is integrated inside the turntable tabletop 10. When locking, the piston of the hydraulic cylinder extends out and abuts against one end of the pressing plate 522 to drive one end of the pressing plate 522 to move.

[0044] In the solution of the present invention, as Figures 3 to 7As shown, the working process of the positioning and locking structure of the servo turntable is that when the turntable table 10 rotates, the piston of the hydraulic cylinder of the locking assembly 50 retracts, the pressure plate 522 is in the initial position, and the position of the other end is separated from the base plate 511. At the same time, the positioning pin 411 is also in a retracted state, and its head is separated from the tapered hole 4211. At this time, the turntable table 10 can rotate freely. When the turntable table 10 is rotated into place, the piston of the hydraulic cylinder connected to the tail of the positioning pin 411 extends to drive the positioning pin 411 to move upward, so that the positioning pin 411 rises to a high position and is inserted into the tapered hole 4211 and is fixed with an interference fit with the tapered hole. Under the action of the 2.5Mpa hydraulic cylinder, the positioning pin 411 can provide an upward force of nearly 4000N to the tapered hole 4211, thereby positioning the turntable table 10. At this time, the processing station of the turntable table 10 is in a predetermined position. Then, the piston of the hydraulic cylinder of the locking assembly 50 extends and moves downward, resisting the downward movement of one end of the push plate 522. The other end of the pressing plate 522 moves upward under the action of the lever and contacts the bottom plate 511. The hydraulic cylinder of the locking assembly 50 provides continuous external force to make the other end of the pressing plate 522 contact and press the bottom plate 511 tightly. Under the action of the 2.5Mpa hydraulic cylinder, the pressing force between the pressing plate 522 and the bottom plate 511 can be close to 20000N, realizing the locking and fixing between the turntable table 10 and the support frame 20, which is sufficient to withstand the impact of the processing force in all directions during processing. At this time, the turntable table 10 has completed the positioning and locking, and the workpiece on the processing station can be processed in the next step. When the processing is completed, the pistons of the hydraulic cylinder of the locking assembly 50 and the hydraulic cylinder connected to the tail of the positioning pin 411 are retracted, so that the positioning pin 411 is separated from the tapered hole 4211, the other end of the pressing plate 522 is separated from the bottom plate 511, and the turntable table 10 is separated from the support frame 20, and the turntable table 10 can rotate freely to the next processing station.

[0045] The present invention also provides a servo turntable, comprising the positioning and locking structure of the servo turntable as described above.

[0046] The servo turntable of the present invention can be applied to the turntable structure of a slot mill, and can also be applied to other heavy-load turntable mechanisms.

[0047] In summary, in the positioning and locking structure of the servo turntable provided by the present invention, the positioning assembly and the locking assembly are both arranged on the lower surface of the turntable table, and will not have an adverse effect on the processing of the workpiece on the upper surface of the turntable table.

[0048] The arrangement of the positioning assembly and the locking assembly can realize the precise positioning of the turntable surface, and can realize the reliable locking between the turntable surface and the supporting frame, thereby ensuring the processing accuracy.

[0049] The hydraulic cylinder pipelines of the positioning component and the locking component are both hidden inside the tabletop or the support frame, with high integration and minimizing interference with other structures to the greatest extent.

[0050] The above are only the preferred embodiments of the present invention and do not impose any restrictive effect on the present invention. Any person skilled in the art within the technical field, without departing from the technical solution of the present invention, makes any form of equivalent substitution or modification and other changes to the technical solution and technical content disclosed by the present invention, which are all within the content of the technical solution of the present invention and still fall within the protection scope of the present invention.

Claims

1. A positioning and locking structure of a servo turntable, characterized in that, It includes a turntable tabletop, a support frame, a power component, a positioning component, and at least one locking component; The power component includes a rotating shaft, and the turntable tabletop is sleeved and connected to the rotating shaft; The power component is configured to drive the turntable tabletop to rotate through the rotating shaft; The support frame is arranged below the turntable tabletop; The positioning component includes a positioning female part and at least one positioning male part. The positioning female part is arranged on the support frame, and the positioning male part is arranged on the lower surface of the turntable tabletop. The positioning female part can move in a direction perpendicular to the turntable tabletop so that the positioning female part rises to be connected with the positioning male part in cooperation, or the positioning female part descends to be separated from the positioning male part; The locking component includes a locking female part and a locking male part. The locking female part is arranged on the support frame, and the locking male part is arranged on the lower surface of the turntable tabletop. The locking male part cooperates with the locking female part to lock and fix or release the turntable tabletop and the support frame.

2. The positioning and locking structure of the servo turntable according to claim 1, characterized in that, The number of the positioning male parts is at least 4, and the 4 positioning male parts are equally distributed circumferentially on the lower surface of the turntable tabletop.

3. The positioning and locking structure of the servo turntable according to claim 1, characterized in that, The positioning female part includes a positioning pin, and the positioning male part includes a plunger. An opening matching the plunger is formed on the lower surface of the turntable tabletop. The plunger is fixedly arranged in the opening. A tapered hole matching the head of the positioning pin is formed on the lower surface of the plunger close to the support frame. When the positioning pin rises, it is inserted into the tapered hole.

4. The positioning and locking structure of the servo turntable according to claim 3, characterized in that, When the positioning pin rises to the highest point, it is in interference fit connection with the tapered hole, and the contact area between the two is greater than 70%.

5. The positioning and locking structure of the servo turntable according to claim 3, characterized in that, The cylindricity of the positioning pin is less than or equal to 0.005 mm.

6. The positioning and locking structure of the servo turntable according to claim 3, characterized in that, The tail of the positioning pin is connected to a hydraulic cylinder, and the hydraulic cylinder drives the positioning pin to move.

7. The positioning and locking structure of the servo turntable according to claim 1, characterized in that, The number of the locking components is more than 3.

8. The positioning and locking structure of the servo turntable according to claim 1, characterized in that, The locking male part includes a driving part, a pressing plate, and a base; the locking female part includes a bottom plate; A locking opening is formed on the lower surface of the turntable tabletop, and the driving part is arranged in the locking opening; The base is fixed on the lower surface of the turntable tabletop and is arranged close to the locking opening; The pressing plate is hinged to the base; The driving part is configured to drive one end of the pressing plate to move so that the other end of the pressing plate contacts and presses against the bottom plate.

9. The positioning and locking structure of the servo turntable according to claim 8, characterized in that, The driving part is a hydraulic cylinder, and the piston of the hydraulic cylinder extends to drive one end of the pressing plate to move.

10. A servo turntable, characterized in that, It includes the positioning and locking structure of the servo turntable according to any one of claims 1-9.

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