A multi-point locking turntable structure

Abstract

This application discloses a multi-point locking rotary table structure, relating to the field of CNC rotary table technology. It includes a support base and a rotary table rotatably connected to the support base. The rotary table includes a worktable surface and a locking part. The rotary table structure also includes a locking unit, which comprises multiple locking modules driven by a hydraulic source. Each locking module includes a cylinder and elastic clamping plates. The cylinder has at least one piston chamber and an oil passage for distributing hydraulic oil between the piston chambers. A piston is disposed within each piston chamber. The clamping plates are positioned corresponding to the piston's movement direction and located between the piston and the locking part. When hydraulic oil is introduced into the oil passage, it drives the piston to extend out of the piston chamber, forcing the clamping plates to elastically deform and press against the locking part, achieving multi-point synchronous locking. When pressure is released, the clamping plates return to their original position due to their elasticity. This application achieves uniform multi-point locking of the rotary table in the circumferential direction, while simplifying the structure, improving reset reliability, and enhancing maintenance convenience.

Description

Technical Field

[0001] This application relates to the field of CNC rotary table technology, specifically to a rotary table structure with multi-point locking. Background Technology

[0002] As a workpiece support component of CNC machining equipment, the rotary table is mainly used to drive the workpiece to rotate around its own axis, achieving multi-faceted machining or indexing positioning. The performance of its locking structure determines the rotary table's positioning accuracy, load-bearing capacity, machining stability, and workpiece machining quality. The function of the locking structure is to firmly lock the rotary table after indexing positioning, to withstand the enormous torque and cutting force generated during cutting, preventing slight rotation or vibration of the rotary table and ensuring machining accuracy. In particular, the machining of some large workpieces often relies on large rotary tables with a diameter exceeding 1.5 meters. These rotary tables not only need to bear the weight of hundreds of kilograms or even several tons of workpieces, but also need to achieve rapid and precise locking after high-speed rotation. Currently, the rotary table locking structures widely used in the industry are mainly divided into two types: disc type and ring type.

[0003] The disc-type locking structure achieves locking through a set of annular discs consisting of alternating static and moving discs. The static discs are connected to the fixed components of the turntable, while the moving discs are connected to the rotating components. A hydraulically driven piston presses the disc assembly, using the friction between the discs to restrict the turntable's rotation. However, as the turntable diameter increases, the outer diameter of the disc assembly needs to be increased accordingly, significantly increasing the processing difficulty of individual discs. On the one hand, large-diameter discs require high flatness and parallelism, necessitating processing on large precision grinding machines, with processing cycles lasting several days and costs several times higher than those for small-diameter discs. On the other hand, large-diameter discs must be aligned with the turntable axis during assembly. Excessive assembly deviation can lead to uneven stress on the discs, resulting in excessively rapid local wear or weakened locking force, and in severe cases, even disc breakage.

[0004] The ring-type locking structure uses two or more arc-shaped claws to surround the rotating part of the turntable. The claws are hydraulically driven to retract, and locking is achieved by the friction between the inner arc surface of the claws and the outer circle of the rotating part. While this structure avoids the machining difficulties of large-diameter discs, it has the following drawbacks: First, the arc-shaped inner surface of the gripper needs to be precisely matched with the outer circle of the rotating parts of the turntable. When the diameter of the turntable exceeds a certain size, the machining of the arc surface requires customized special tooling, and the machining accuracy is difficult to guarantee. If the gap between the inner arc surface and the outer circle is too large, it will cause the gripper to be subjected to local force during locking, resulting in point contact rather than surface contact. The locking friction will be greatly reduced, which cannot meet the locking requirements of heavy workpieces. Second, the grippers of the ring-shaped structure are mostly integral designs. If a gripper is worn or malfunctions, the entire locking mechanism must be disassembled for replacement. During maintenance, the turntable must be removed from the machine tool, which takes up to several hours and seriously affects production efficiency. Third, when hydraulically driven, the movement of the gripper depends on the large piston. The larger the diameter of the turntable, the piston stroke and cylinder volume need to be increased simultaneously, which leads to a longer hydraulic oil filling time and a slower locking response speed. High-precision machining scenarios usually have high requirements for response time. The delayed locking action will cause deviations in the workpiece machining position and a significant increase in the scrap rate.

[0005] In addition, existing locking structures suffer from poor adaptability: the core components of disc-type and ring-type structures are strongly bound to the diameter of the turntable, requiring a set of dedicated locking components for each turntable, making them incompatible. This forces manufacturers to stock multiple specifications of spare parts, resulting in high inventory costs. At the same time, the locking force of existing structures is difficult to adjust. If workpieces of different weights need to be processed, the locking force needs to be adjusted, requiring the replacement of springs of different specifications or the adjustment of the hydraulic system pressure. This operation is complex and prone to adjustment errors, affecting locking stability.

[0006] Therefore, there is an urgent need in this field for a new type of turntable locking structure, especially suitable for large turntables, which has the advantages of low part processing difficulty, controllable cost, convenient assembly and maintenance, and fast locking response speed. Summary of the Invention

[0007] The purpose of this application is to overcome the shortcomings of the prior art and provide a multi-point locking turntable structure. Through modular and multi-point distributed design, it effectively solves the problems of processing, assembly, response speed and maintenance convenience of large turntable locking structures.

[0008] The technical solution adopted in this application is as follows:

[0009] A multi-point locking turntable structure includes a support base and a turntable rotatably connected to the support base. The turntable includes a worktable surface and a locking part. The turntable structure also includes a locking unit arranged around the locking part. The locking unit includes multiple locking modules, which are driven by a hydraulic source to synchronously generate locking forces at multiple circumferential points of the locking part. Each locking module includes a cylinder and an elastic clamping plate. The cylinder has at least one piston chamber and an oil passage for distributing hydraulic oil between the piston chambers. A piston is disposed in the piston chamber. The clamping plate is disposed corresponding to the movement direction of the piston and is located between the piston and the locking part. When hydraulic oil is introduced into the oil passage, it drives the piston to extend out of the piston chamber, forcing the clamping plate to elastically deform and press against the locking part, thereby achieving multi-point synchronous locking. When the oil passage is depressurized, the clamping plate returns to its original position due to its elasticity.

[0010] This application employs a locking unit surrounding the locking section and multiple hydraulically driven locking modules. The locking unit is decomposed into multiple small, independent, mass-producible locking modules, which are arranged around the locking section to form a multi-point, modular locking structure. A unified hydraulic power source drives synchronous locking at multiple points around the turntable. This design offers the following advantages: each locking module has a smaller part size, eliminating the need for large machine tools; heat treatment deformation is easier to control, effectively reducing the manufacturing cost of individual parts; modularity implies standardization and easy replacement; assembly can be performed on the outside of the turntable, simplifying the assembly process; and during maintenance, only the damaged individual module needs to be replaced, unlike traditional solutions. Disassembling the entire turntable and the massive locking components significantly reduces maintenance downtime. Because each module requires only a small amount of drive oil, the overall system filling and draining time is shortened, resulting in a faster locking and unlocking response compared to traditional large hydraulic locking structures. This makes it particularly suitable for production lines requiring high cycle times. Multi-point force application helps distribute the locking force evenly around the locking section, improving the force concentration problem of traditional single-point locking. Even large turntables with diameters exceeding 2 meters and bearing several tons of workpieces can avoid deformation and locking offset, ensuring machining accuracy. Compared to mechanical drives, hydraulic drives can precisely control the synchronization of each module's movements, significantly improving response speed and meeting the high-precision machining requirements for rapid locking.

[0011] The piston chamber runs through the two working surfaces of the cylinder body, and two pistons are provided in each piston chamber. When hydraulic oil is introduced into the oil passage, the two pistons in the same piston chamber move in opposite directions and push the clamping plates provided on the two working surfaces of the cylinder body to press the locking part simultaneously from two directions.

[0012] This application designs the piston chamber to extend through both working surfaces of the cylinder and houses two pistons. When hydraulic oil is introduced, the two pistons move in opposite directions and push their corresponding clamping plates, forming a bidirectional, opposing locking mechanism. First, the bidirectional synchronous force applies force from both directions to form a symmetrical clamping of the locking part, effectively improving the stability and reliability of the locking force compared to unidirectional clamping. Second, the opposite movement of the two pistons balances the force on both ends of the cylinder, offsetting the deformation risk and overturning moment caused by unilateral force, resulting in higher locking rigidity, better stability, extended cylinder lifespan, and reduced maintenance costs during long-term use. In addition, the bidirectional clamping structure eliminates the need for additional reverse limiting components, simplifying the structure while making the transmission of locking force more direct, avoiding force loss in intermediate links, further optimizing the locking effect, and solving the problems of easy loosening and short lifespan of traditional unidirectional locking structures under heavy load and high-frequency use scenarios.

[0013] The locking part has an upper clamping surface and a lower clamping surface facing each other. The cylinder is arranged between the upper clamping surface and the lower clamping surface. The clamping plates on the two working surfaces are the upper clamping plate and the lower clamping plate, respectively. When hydraulic oil is introduced into the oil passage, the upper clamping plate presses the upper clamping surface upward, while the lower clamping plate presses the lower clamping surface downward.

[0014] By setting an upper clamping surface and a lower clamping surface in the locking part, and placing the cylinder body centrally between them, the upper and lower clamping plates are pressed together respectively, achieving bidirectional locking in the vertical direction. On the one hand, the dedicated clamping surfaces are precisely machined, and their flatness and roughness meet the requirements for locking force, avoiding wear or locking failure of the locking part caused by clamping force acting on non-designed areas; on the other hand, the facing arrangement of the upper and lower clamping surfaces and the central placement of the cylinder body ensure that the locking part is subjected to balanced force in the vertical direction, preventing the turntable from tilting due to uneven force distribution.

[0015] Both pistons in the same piston chamber have protrusions on their opposing end faces. After the oil passage is depressurized, the two pistons move toward each other under the elastic restoring force of the clamping plate and abut against each other through the protrusions to maintain an oil gap communicating with the oil passage between the two pistons.

[0016] This application features protrusions on the opposing end faces of two pistons. After pressure relief, the pistons abut against and maintain the oil gap via these protrusions. First, the protrusions restrict the piston's reset position, preventing the oil gap from disappearing. This allows hydraulic oil to directly enter the gap and drive the piston during subsequent oil intake, improving locking response speed. For example, in high-speed indexing machining scenarios, where the rotary table needs frequent locking and unlocking, a rapid response reduces process intervals and improves production efficiency. Second, the two pistons employ the same structural design, both featuring protrusions, enhancing part versatility. Pistons of the same specification can be interchanged in different positions, reducing processing difficulty and inventory costs. This solves the problem of traditional pistons requiring separate processing and complex inventory management. Simultaneously, the protrusions prevent direct rigid collisions between the two pistons, reducing wear on the piston end faces and extending piston lifespan. Especially in high-frequency locking and unlocking cycles, this effectively reduces the frequency of part replacement, further lowering operating costs and improving the problems of slow response, poor part versatility, and rapid wear associated with traditional piston structures.

[0017] One end of the clamping plate is fixedly connected to the cylinder body via a connector, and its main body extends outward to cover the open end of the piston chamber, thus forming a cantilever beam structure. When the piston extends, it acts on the extended part of the clamping plate, causing it to undergo bending elastic deformation to achieve clamping of the locking part.

[0018] This application designs the clamping plate as a cantilever beam structure with one end fixed and the main body extended. On the one hand, the elastic characteristics of the cantilever beam structure are adapted to the elasticity of the clamping plate itself. When the piston is pushed, the clamping plate can generate controllable bending deformation, avoiding damage caused by excessive deformation. For example, in long-term high-frequency use, this structure can ensure the elastic stability of the clamping plate and maintain the consistency of the locking effect. Moreover, the cantilever beam structure itself is like a highly efficient lever, which can generate a large clamping force at the end of the clamping plate with a small piston stroke, amplifying the locking effect. On the other hand, the connection method with one end fixed simplifies the assembly process of the clamping plate and the cylinder body. Installation can be achieved without complex positioning parts, reducing assembly difficulty and errors, and improving production efficiency. At the same time, the extended part covers the open end of the piston cavity, which can effectively prevent cutting chips, dust and other impurities from entering the piston cavity, avoiding piston movement obstruction or seal wear, and improving the sealing performance and reliability of the structure.

[0019] The turntable structure also includes an auxiliary reset assembly, which includes a spring fixing plate fixed to the cylinder body and a spring mounting plate elastically connected to the spring fixing plate via a spring. The spring mounting plate abuts against the clamping plate. When the clamping plate is pushed by the piston and undergoes elastic deformation, it simultaneously compresses the spring through the spring mounting plate. When the oil passage is depressurized, the spring force released by the spring assists the clamping plate in resetting.

[0020] This application presents an auxiliary reset assembly comprising a spring fixing plate, a spring mounting plate, and a spring. Firstly, the spring is compressed and stores elastic potential energy when the clamping plate deforms. After decompression, the spring force is released to assist the clamping plate in resetting. Even if the clamping plate's elasticity decays, it ensures thorough and rapid reset, solving the problem of unreliable reset. Secondly, the design of the spring fixing plate being fixed to the cylinder body and the spring mounting plate abutting against the clamping plate ensures that the spring force is evenly transmitted to the clamping plate, avoiding reset offset caused by localized force. This ensures that the clamping plate returns to its precise position each time it resets, maintaining consistent locking accuracy. Simultaneously, the auxiliary reset assembly has a simple structure, without adding too many complex components, balancing practicality and economy. It significantly improves reset reliability without incurring substantial additional costs, making it particularly suitable for long-term continuous production scenarios, reducing downtime due to reset failures and improving production efficiency.

[0021] The locking part is configured as a shaft structure coaxial with the rotation axis of the turntable, and an annular locking groove is machined around its outer peripheral surface; the cylinder is embedded in the annular locking groove, and the working surface of the clamping plate is opposite to the groove wall of the annular locking groove, thereby applying the locking force to the groove wall.

[0022] This application features an annular locking groove machined on the outer periphery of the locking part, with the cylinder body embedded within it. On one hand, the annular locking groove provides dedicated installation space for the cylinder body and clamping plates. The locking force acts directly and evenly on the solid inner wall of the annular locking groove, ensuring reliable positioning of the locking module and preventing circumferential displacement. Simultaneously, the groove wall serves as a dedicated clamping surface for the corresponding clamping plates. During machining, the flatness and roughness can be controlled through appropriate processes to improve the fit between the clamping plates and the groove wall, enhancing locking friction. On the other hand, the design of the cylinder body embedded in the annular locking groove makes the overall structure of the locking unit more compact, reducing radial space occupation and adapting to the complex installation environment around the turntable. It can be flexibly combined with other components. Furthermore, the annular structure allows the locking module to be arranged at any circumferential position, and the number of modules can be increased or decreased according to the turntable size and locking torque requirements, improving adaptability and solving the problems of poor positioning, insufficient friction, large space occupation, and poor adaptability of traditional locking modules. It is suitable for turntables of different sizes and installation environments.

[0023] The cylinders of multiple locking modules are connected in series via oil pipes to form a continuous locking oil circuit.

[0024] This application connects the cylinders of multiple locking modules in series via oil pipes to form a continuous locking oil circuit. First, the series oil circuit ensures that hydraulic oil flows sequentially through each cylinder, guaranteeing consistent pressure in each piston chamber and enabling synchronized action of all modules, avoiding insufficient or excessive locking force in certain areas. Second, the series structure simplifies the oil circuit layout, requiring only one or two main interfaces to achieve hydraulic drive for all modules, reducing the number of oil pipes and connection points, and lowering the risk of oil leakage. Especially in high-pressure hydraulic systems, the reduction in leakage risk improves system safety and stability. Simultaneously, the series oil circuit facilitates unified control, allowing locking and unlocking of all modules to be achieved through a single hydraulic source. Operation is convenient, eliminating the need for separate adjustments to each circuit, reducing operational difficulty and errors, and solving the problems of poor synchronization, complex oil circuits, and high leakage risk associated with traditional multi-circuit drives. This makes it suitable for precision machining scenarios requiring high locking synchronization.

[0025] The locking unit consists of two parallel locking oil circuits, and the locking modules of the two locking oil circuits are symmetrically arranged around the rotation axis of the turntable; the two locking oil circuits share the same oil inlet and are driven by the same hydraulic source.

[0026] This application designs the locking unit as two parallel and symmetrically arranged locking oil circuits, sharing a hydraulic power source and oil inlet. First, the parallel connection of the two oil circuits ensures pressure synchronization, and the symmetrical arrangement ensures that the locking force is evenly distributed around the turntable, avoiding imbalance of force on one side. Second, the dual oil circuits form a redundant design. If one oil circuit fails to work due to oil pipe damage, seal failure, or other malfunctions, the other oil circuit can still maintain the basic locking function, preventing sudden loss of control of the turntable and reducing safety risks. Especially in heavy-duty and high-risk processing scenarios, the redundant design can significantly improve the reliability of equipment operation. At the same time, the two oil circuits share a hydraulic power source and oil inlet, eliminating the need for additional hydraulic control components. This improves reliability while controlling equipment costs, and solves the problems of low reliability and uneven force distribution in traditional single-oil-circuit structures.

[0027] The locking module also includes a mounting base, which has a mounting portion fixedly connected to the support base and a support portion for supporting and fixing the cylinder body.

[0028] By setting up a mounting base, the mounting part is fixed to the support base, and the support base fixes the cylinder body. On the one hand, the mounting base provides a stable installation reference for the locking module, ensuring that the module does not shift its position under working conditions such as high-speed rotation and cutting vibration, and maintaining locking accuracy. On the other hand, as an intermediate connecting component, the mounting base does not require complex processing of the support base. Only basic mounting holes need to be reserved to adapt to locking modules of different sizes, improving structural adaptability and reducing the processing cost of the support base. At the same time, during maintenance, only the connecting parts between the mounting base, support base, and cylinder body need to be disassembled to quickly remove the locking module without disassembling the turntable or the entire support base, which greatly shortens maintenance time. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 A cross-sectional view of the multi-point locking turntable structure provided in an embodiment of this application;

[0031] Figure 2 Assembly of the locking module provided in the embodiments of this application Figure 1 ;

[0032] Figure 3 Assembly of the locking module provided in the embodiments of this application Figure 2 ;

[0033] Figure 4 Cross-sectional view of the locking module provided in the embodiments of this application Figure 1 ;

[0034] Figure 5 Cross-sectional view of the locking module provided in the embodiments of this application Figure 2 ;

[0035] Figure 6 A partial cross-sectional view of the multi-point locking turntable structure provided in the embodiments of this application. Figure 1 ;

[0036] Figure 7 A partial cross-sectional view of the multi-point locking turntable structure provided in the embodiments of this application. Figure 2 ;

[0037] Figure 8 This is a schematic diagram of the structure of the turntable provided in the embodiments of this application;

[0038] Figure 9 This is a top view of the multi-point locking turntable structure provided in the embodiment of this application. In order to clearly show the arrangement of the locking units, the turntable that is obscured by the locking units is hidden from the field of view.

[0039] List of components and reference numerals:

[0040] 1. Support base;

[0041] 3. Turntable, 31. Worktable surface, 32. Locking part, 321. Upper clamping surface, 322. Lower clamping surface, 323. Annular locking groove;

[0042] 4 Locking unit, 41 Locking module, 411 Cylinder body, 4111 Piston chamber, 4112 Oil passage, 4113 Oil interface, 412 Clamping plate, 4121 Upper clamping plate, 4122 Lower clamping plate, 413 Piston, 4131 Protrusion, 414 Oil gap, 415 Connector, 416 Spring fixing plate, 417 Spring, 418 Spring mounting plate, 419 Mounting seat, 4191 Mounting part, 4192 Support part, 42 Oil pipe, 43 Oil inlet. Detailed Implementation

[0043] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0045] Furthermore, it should be understood in the description of this application that the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0046] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0048] In the embodiments of this application, reference is made to Figures 1 to 9 This application provides a multi-point locking turntable structure. For ease of explanation and understanding, the following descriptions are based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is merely a specific example and illustrative illustration, and does not constitute a specific limitation on the technical solution provided in this application.

[0049] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 9 As shown, the multi-point locking turntable structure includes a support base 1 and a turntable 3 rotatably connected to the support base 1. The turntable 3 includes a worktable surface 31 and a locking part 32. The turntable 3 structure also includes a locking unit 4 arranged around the locking part 32. The locking unit 4 includes multiple locking modules 41, which are driven by a hydraulic source to synchronously generate locking force at multiple points in the circumference of the locking part 32. The locking module 41 includes a cylinder 411 and a flexible clamping plate 412. The cylinder 411 is provided with at least one piston chamber 411. 1. An oil passage 4112 for distributing hydraulic oil between each piston chamber 4111. A piston 413 is provided in the piston chamber 4111. A clamping plate 412 is provided corresponding to the movement direction of the piston 413 and is located between the piston 413 and the locking part 32. When hydraulic oil is introduced into the oil passage 4112, the piston 413 is driven to extend out of the piston chamber 4111, forcing the clamping plate 412 to undergo elastic deformation and press against the locking part 32, thereby achieving multi-point synchronous locking. When the oil passage 4112 is depressurized, the clamping plate 412 returns to its original position due to its own elasticity.

[0050] It should be noted that although the accompanying drawings illustrate an embodiment where the locking unit 4 includes six locking modules 41, this should not be construed as limiting the scope of this application. In other embodiments, the locking unit 4 may employ other suitable numbers of locking modules 41, such as four, eight, etc. Furthermore, although the accompanying drawings illustrate an embodiment where the cylinder 411 has five piston chambers 4111 arranged in a straight line along the length of the cylinder 411, this should not be construed as limiting the scope of this application. In other embodiments, the cylinder 411 may also have other suitable numbers of piston chambers 4111, and the piston chambers 4111 may be arranged in other suitable ways, such as three piston chambers 4111 arranged in a triangle, four piston chambers 4111 arranged in a rectangle, etc.

[0051] Support base 1 is the basic load-bearing component of rotary table 3. In CNC machine tool applications, from the perspective of the overall machine structure, the machine bed or base is the basic frame of the entire machine. The support base is usually fixed to a designated installation area of ​​the machine bed with bolts, or it is integrally cast with the machine bed, and it is a dedicated support branch extending from the machine bed to the rotary table. Its core function is to provide a stable installation reference and load-bearing support for the rotary table, directly connecting the machine bed and the rotary table. The rotary table 3 is assembled with support base 1 through bearings. Support base 1, through its own structure, transmits the weight of the rotary table 3 and the workpiece, as well as the cutting force during machining, to the machine bed, and finally distributes it to the machine tool foundation, preventing displacement or vibration of the rotary table 3 during operation.

[0052] Specifically, such as Figure 2 and Figure 3 As shown, the cylinder body 411 can be equipped with two oil ports 4113 to allow hydraulic oil to enter and exit the oil passage 4112, thereby realizing pressurization and depressurization.

[0053] Furthermore, this application does not specifically limit the locking position of the clamping piece 412 on the locking part 32. In other words, it does not specifically limit the point of application of pressure applied by the clamping piece 412 on the locking part 32. For example, the point of application can be the outer peripheral surface, bottom surface or other suitable position of the locking part 32.

[0054] As a key actuator that converts the thrust of the piston 413 into a large frictional force on the locking part 32, the clamping plate 412's structural design directly affects its locking performance, service life, and reliability. In a preferred embodiment, the clamping plate 412 can be designed as a single, highly elastic metal plate, such as spring steel. In other embodiments, the clamping plate 412 can also be designed as a split composite structure, such as an elastic matrix composite friction pad. The matrix is ​​made of high-strength spring steel, which provides the main elastic restoring force. On its surface in contact with the locking part 32, a replaceable friction pad is installed by riveting, bonding, or embedded slots. The pad can be made of composite materials or special engineering plastics, possessing a high coefficient of friction and wear resistance. The friction pad can be directly replaced after wear, without replacing the entire clamping plate 412, resulting in low maintenance costs. This is suitable for operating conditions with extremely high locking frequencies and severe wear, such as the turntable 3 on an automated automotive parts production line.

[0055] Traditional large rotary table locking solutions, such as large-diameter disc spring assemblies or ring-shaped structures, suffer from the core problems of enormous part size, high processing costs, difficult assembly and maintenance, and slow hydraulic system response. In practical applications, such as when machining large engineering machinery, the diameter of the CNC rotary table used often exceeds two meters. Traditional solutions face significant challenges in this regard. This application employs a locking unit 4 surrounding the locking part 32 and multiple hydraulically driven locking modules 41. By decomposing the locking unit 4 into multiple small, independent, mass-producible locking modules 41 and arranging them around the locking part 32, a multi-point, modular locking structure is formed, which is then uniformly driven by a hydraulic source to achieve synchronous locking at multiple circumferential points.

[0056] This design offers several advantages: each locking module 41 has a smaller part size, eliminating the need for large machine tools for machining, and heat treatment deformation is easier to control, effectively reducing the manufacturing cost of individual parts; modularity means standardization and easy replacement, allowing assembly to be performed on the outside of the turntable 3, simplifying the assembly process; during maintenance, only the damaged individual module needs to be replaced, without disassembling the entire turntable 3 and the huge locking components as in traditional solutions, significantly reducing maintenance downtime; due to the small amount of driving oil required for each module, the total oil filling and draining time of the system is shortened, and the locking and unlocking response speed is faster than traditional large hydraulic locking structures, making it particularly suitable for production lines requiring high cycle times; multi-point force application locking helps to evenly distribute the locking force circumferentially in the locking part 32, improving the force concentration problem of traditional single-point locking, and even for large turntables with a diameter exceeding 2 meters and bearing several tons of workpieces, it can avoid deformation and locking offset of the locking part, ensuring machining accuracy; compared to mechanical drive, hydraulic drive can precisely control the synchronization of the actions of each module, significantly improving the response speed and meeting the high-precision machining requirements for rapid locking.

[0057] As a preferred embodiment of this application, such as Figure 5 As shown, the piston chamber 4111 extends through the two working surfaces of the cylinder body 411, and two pistons 413 are provided in each piston chamber 4111. When hydraulic oil is introduced into the oil passage 4112, the two pistons 413 in the same piston chamber 4111 move in opposite directions and push the clamping plates 412 provided on the two working surfaces of the cylinder body 411 respectively, so as to press the locking part 32 simultaneously from two directions. Figure 5 The illustration shows an embodiment in which the piston chamber 4111 passes through the top working surface and the bottom working surface of the cylinder body 411. Two pistons 413 are arranged vertically in each piston chamber 4111. When hydraulic oil is introduced into the oil passage 4112, the upper piston 413 moves upward and the lower piston 413 moves downward, so that they move away from each other in opposite directions. When the pressure is released, the upper piston 413 moves downward and the lower piston 413 moves upward, so that they move closer to each other.

[0058] Traditional locking structures are mostly designed with unidirectional force application. If the friction plate is pressed only from one side, the locking force stability is insufficient. When subjected to huge cutting torque, a tilting moment will be generated that causes the turntable to rise or fall. This not only affects the life of the spindle bearing, but may also cause slight sway of the turntable, impairing machining accuracy. In this application, the piston chamber 4111 is designed to penetrate the two working surfaces of the cylinder body 411 and contains two pistons 413. When hydraulic oil is introduced, the two pistons 413 move in opposite directions and push the corresponding clamping plates 412 respectively, forming a bidirectional counter-locking mechanism. First, the bidirectional synchronous force application forms a symmetrical clamping of the locking part 32 from two directions. Compared with unidirectional clamping, the stability and reliability of the clamping force are effectively improved. For example, in the machining of large gears, the turntable 3 needs to withstand the impact of cutting forces. Bidirectional clamping can effectively prevent the turntable 3 from loosening in a single direction, ensuring the gear indexing accuracy. Second, the reverse movement of the two pistons 413 makes the forces on both ends of the cylinder 411 balanced, offsetting the deformation risk and overturning moment caused by unilateral forces. The locking rigidity is higher, the stability is better, the service life of the cylinder 411 is extended, and the maintenance cost during long-term use is reduced. In addition, the bidirectional clamping structure does not require additional reverse limit components. While simplifying the structure, it makes the transmission of the clamping force more direct, avoids force loss in the intermediate links, further optimizes the locking effect, and solves the problems of easy loosening and short service life of traditional unidirectional clamping structures in heavy-load and high-frequency use scenarios.

[0059] As a preferred embodiment of this implementation, such as Figure 2 , Figure 5 , Figure 6 and Figure 7As shown, the locking part 32 has an upper clamping surface 321 and a lower clamping surface 322 directly opposite each other. The cylinder body 411 is arranged between the upper clamping surface 321 and the lower clamping surface 322. The clamping plates 412 on the two working surfaces are the upper clamping plate 4121 and the lower clamping plate 4122, respectively. When hydraulic oil is introduced into the oil passage 4112, the upper clamping plate 4121 presses upward against the upper clamping surface 321, while the lower clamping plate 4122 presses downward against the lower clamping surface 322. In order to implement the bidirectional locking concept into a relatively ideal structural form, the direction of the locking force has been further optimized. By setting the upper clamping surface 321 and the lower clamping surface 322 in the locking part 32, and arranging the cylinder body 411 in the center between the two, the upper clamping plate 4121 and the lower clamping plate 4122 are pressed together respectively, realizing bidirectional locking in the vertical direction. On the one hand, the dedicated clamping surface is precisely machined, and its flatness and roughness meet the requirements for locking force, avoiding wear or locking failure of the locking part 32 caused by clamping force acting on non-designed areas. On the other hand, the facing arrangement of the upper clamping surface 321 and the lower clamping surface 322 and the central arrangement of the cylinder body 411 ensure that the locking part 32 is subjected to balanced force in the vertical direction, preventing the turntable 3 from tilting due to uneven force in the vertical direction. It is especially suitable for large worktables that bear heavy objects, and can ensure the horizontal accuracy of the worktable in the locking state, so that the workpiece is always in a stable force environment during the processing. It solves the problem of uneven force and easy damage to the locking part 32, and improves the processing qualification rate of large precision workpieces.

[0060] It should be noted that this application does not limit the specific formation of the upper clamping surface 321 and the lower clamping surface 322. As long as there are two surfaces on the locking part 32 that are arranged opposite each other in space and can form an effective pressing contact with the upper clamping piece 4121 and the lower clamping piece 4122, whether they are continuous or segmented, protruding or recessed, they are within the protection scope of this embodiment.

[0061] As a preferred embodiment of this implementation, such as Figure 4 and Figure 5As shown, both pistons 413 in the same piston chamber 4111 have protrusions 4131 on their opposing end faces. After the oil passage 4112 is depressurized, the two pistons 413 move towards each other under the elastic restoring force of the clamping plate 412 and abut against each other through the protrusions 4131 to maintain an oil gap 414 between the two pistons 413 that communicates with the oil passage 4112. Those skilled in the art will understand that a common hidden danger of hydraulic locking systems is that after depressurization and reset, the piston may completely seal the oil chamber, preventing the oil from quickly entering the working chamber when oil is supplied again, resulting in air resistance or cavitation, causing delayed, weak, or even failed locking actions. This application provides a protrusion 4131 on the opposing end faces of two pistons 413. After pressure is released, the pistons 413 abut against and maintain the oil gap 414 through the protrusion 4131. The figure shows an embodiment in which the protrusion 4131 is located in the middle of the pistons 413. When the upper and lower pistons 413 abut against each other, a middle abutment is formed, and the oil gap 414 surrounds the protrusion 4131. First, the protrusion 4131 restricts the reset position of the piston 413, preventing the oil gap 414 from disappearing. This allows hydraulic oil to directly enter the gap and drive the piston 413 during subsequent oil intake, improving the locking response speed. For example, in high-speed indexing machining scenarios, the rotary table 3 needs to frequently lock and release. A rapid response can reduce process interval time and improve production efficiency. Second, the two pistons 413 adopt the same structural design, both with protrusions 4131, improving the versatility of parts. Pistons 413 of the same specification can be interchanged in different positions, reducing processing difficulty and inventory costs. This solves the problem of traditional pistons 413 with different structures needing to be processed separately and having complex inventory management. At the same time, the protrusion 4131 abuts against and avoids direct rigid collision between the two pistons 413, reducing wear on the piston 413 end face and extending the service life of the piston 413. Especially in high-frequency locking and releasing cycles, it can effectively reduce the frequency of parts replacement, further reducing usage costs and improving the problems of slow response, poor parts versatility, and rapid wear of traditional piston 413 structures.

[0062] The accompanying drawings of this application only illustrate an embodiment where the piston chamber 4111 extends through both working surfaces of the cylinder body 411 and each piston chamber 4111 contains two pistons 413. In an alternative embodiment, one end of the piston chamber may be closed and the other end open, with only one piston in each piston chamber. The oil gap 414 is formed between the piston and the closed end of the piston chamber. In this case, only a clamping plate needs to be arranged at the open end of the piston chamber. When hydraulic oil is introduced, the piston presses the clamping plate against the locking part to achieve one-way locking.

[0063] As a preferred embodiment of this application, such as Figure 2 and Figure 6As shown, one end of the clamping plate 412 is fixedly connected to the cylinder body 411 via a connector 415. Its main body extends over the open end of the piston chamber 4111, thus forming a cantilever beam structure. When the piston 413 extends, it acts on the overhanging portion of the clamping plate 412, causing it to undergo bending elastic deformation to press against the locking part 32. Specifically, the connector 415 can be a screw, which passes through the clamping plate 412 and is tightened to the cylinder body 411. The clamping plate 412 is designed as a cantilever beam structure with one end fixed and the main body extended. On the one hand, the elastic characteristics of the cantilever beam structure are adapted to the elasticity of the clamping plate 412 itself. When the piston 413 pushes, the clamping plate 412 can generate controllable bending deformation, avoiding damage caused by excessive deformation. For example, in long-term high-frequency use, this structure can ensure the elastic stability of the clamping plate 412 and maintain the consistency of the locking effect. Moreover, the cantilever beam structure itself is like an efficient lever, which can generate a large clamping force at the end of the clamping plate 412 with a small piston stroke, thus amplifying the locking effect. On the other hand, the connection method with one end fixed simplifies the assembly process of the clamping plate 412 and the cylinder 411. Installation can be achieved without complex positioning parts, reducing assembly difficulty and errors, and improving production efficiency. At the same time, the extended part covers the open end of the piston cavity 4111, which can effectively prevent cutting chips, dust and other impurities from entering the piston cavity 4111, avoiding obstruction of piston 413 movement or wear of seals, thus improving the sealing performance and reliability of the structure.

[0064] Furthermore, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the turntable 3 structure also includes an auxiliary reset assembly. The auxiliary reset assembly includes a spring fixing plate 416 fixed to the cylinder body 411 and a spring mounting plate 418 elastically connected to the spring fixing plate 416 via a spring 417. The spring mounting plate 418 abuts against the clamping plate 412. When the clamping plate 412 is pushed by the piston 413 and undergoes elastic deformation, the spring 417 is compressed simultaneously through the spring mounting plate 418. When the oil passage 4112 is depressurized, the elastic force released by the spring 417 assists the clamping plate 412 in resetting. Since the attached drawings show embodiments where the clamping plates 412 are the upper clamping plate 4121 and the lower clamping plate 4122, each locking module 41 can be configured with two sets of auxiliary reset assemblies, distributed on the upper and lower sides of the cylinder body 411, and arranged one-to-one with the upper clamping plate 4121 and the lower clamping plate 4122. Since the spring fixing plate 416 and the clamping plate 412 are arranged on the same side of the cylinder 411, and both need to be fixed to the cylinder 411, in a preferred embodiment, the same connector 415 can be used to fix the spring fixing plate 416 and the clamping plate 412 together to the cylinder 411. For example, screws can be used to pass through the spring fixing plate 416 and the clamping plate 412 in sequence and then tighten them to the cylinder 411. This helps to simplify the structure and reduce the number of screws used.

[0065] First, the spring 417 is compressed and stores elastic potential energy when the clamping plate 412 deforms. After decompression, the spring force is released to assist the clamping plate 412 in resetting. Even if the elasticity of the clamping plate 412 decays, it can still ensure a thorough and fast reset, solving the problem of unreliable reset. For example, in a low-temperature processing environment, the elasticity of the clamping plate 412 itself will be reduced due to temperature. The auxiliary reset component can effectively compensate for this defect and ensure the normal switching state of the turntable 3. Second, the design of fixing the spring fixing plate 416 to the cylinder 411 and abutting the spring mounting plate 418 to the clamping plate 412 ensures that the force of the spring 417 is evenly transmitted to the clamping plate 412, avoiding reset offset caused by local force, and ensuring that the clamping plate 412 returns to the precise position every time it resets, maintaining consistent locking accuracy. At the same time, the auxiliary reset component has a simple structure and does not add too many complex parts, taking into account practicality and economy. It can significantly improve reset reliability without adding a lot of extra costs, which is especially suitable for production scenarios with long-term continuous operation, reducing downtime caused by reset failure and improving production efficiency.

[0066] In a preferred embodiment, limiting grooves can be provided on the opposite sides of the spring fixing plate 416 and the spring mounting plate 418, and several springs 417 can be arranged in the limiting grooves. This is beneficial to the working stability of the springs 417 and can also play a limiting role. It not only limits the deformation trajectory of the springs 417, but also limits the working trajectory of the spring mounting plate 418 in the opposite direction.

[0067] As a preferred embodiment of this application, such as Figure 6 , Figure 7 , Figure 8 and Figure 9 As shown, the locking part 32 is a shaft-shaped structure coaxial with the rotation axis of the turntable 3. An annular locking groove 323 is machined around the outer peripheral surface of the locking part 32. The cylinder body 411 is embedded in the annular locking groove 323, and the working surface of the clamping plate 412 is opposite to the groove wall of the annular locking groove 323, so that the locking force is applied to the groove wall. Figure 1 and Figure 8The illustration shows an embodiment where the locking part 32 is a convex shaft formed at the bottom of the turntable 3. The diameter of the locking part 32 is smaller than the diameter of the worktable surface 31. This allows the space below the worktable surface 31 to accommodate the locking module 41, resulting in a compact structure and preventing the locking module 41 from interfering with personnel walking around the equipment. Those skilled in the art will understand that while applying the locking force to the outer cylindrical surface of the locking part 32 is feasible, it is not the optimal choice. Concentrating the force in a localized area of ​​the outer cylindrical surface may cause stress concentration and places high demands on the structural strength of the locking part 32. This application machines an annular locking groove 323 on the outer periphery of the locking part 32 and embeds the cylinder body 411 into the groove. On the one hand, the annular locking groove 323 provides a dedicated installation space for the cylinder body 411 and the clamping plate 412. The locking force acts directly and evenly on the solid inner wall of the annular locking groove 323, ensuring reliable positioning of the locking module 41 and avoiding circumferential displacement. At the same time, the groove wall serves as a dedicated clamping surface for the corresponding clamping plate 412. During machining, the flatness and roughness can be controlled through appropriate processes to improve the fit between the clamping plate 412 and the groove wall, enhancing the locking friction. For example, in the machining of heavy workpieces, sufficient friction can... Effectively prevents the turntable 3 from loosening and ensures processing safety; on the other hand, the design of the cylinder body 411 embedded in the annular locking groove 323 makes the overall structure of the locking unit 4 more compact, reduces the radial space occupied, adapts to the complex installation environment around the turntable 3, and can be flexibly matched with other components; at the same time, the annular structure allows the locking module 41 to be arranged at any position in the circumference, and the number of modules can be increased or decreased according to the size of the turntable 3 and the locking torque requirements, which improves the adaptability and solves the problems of poor positioning, insufficient friction, large space occupation, and poor adaptability of traditional locking modules 41, and is suitable for turntables 3 of different sizes and different installation environments.

[0068] Based on this embodiment, as a preferred implementation, the annular locking groove 323 naturally defines two opposing and parallel inner surfaces, wherein the top wall of the groove forms the upper clamping surface 321, and the bottom wall of the groove forms the lower clamping surface 322. By housing the locking module 41 within this annular locking groove 323, a direct and robust load-bearing structure is provided for the clamping force, resulting in the shortest force flow path and optimal overall rigidity.

[0069] In a preferred embodiment of this application, the cylinders 411 of multiple locking modules 41 are connected in series via oil pipes 42 to form a continuous locking oil circuit. Those skilled in the art will understand that for a large system composed of multiple locking modules 41, the connection of the oil circuit directly affects performance. If independent hydraulic circuits are used for drive, pressure differences in each circuit are likely to occur, leading to asynchronous operation of the locking modules 41, uneven distribution of locking force, and complex oil circuit connections, resulting in a high risk of oil leakage. This application connects the cylinders 411 of multiple locking modules 41 in series via oil pipes 42 to form a continuous locking oil circuit. First, the series oil circuit allows hydraulic oil to flow sequentially through each cylinder 411, ensuring consistent pressure in each piston chamber 4111 and enabling synchronized action of all modules. This avoids insufficient or excessive locking force in certain areas. For example, when multiple modules are arranged circumferentially on a large turntable 3, synchronized action ensures uniform distribution of locking force and prevents deformation of the turntable 3. Second, the series structure simplifies the oil circuit layout, requiring only one or two main interfaces to achieve hydraulic drive for all modules. This reduces the number of oil pipes 42 and connection nodes, lowering the risk of oil leakage. Especially in high-pressure hydraulic systems, reduced leakage risk improves system safety and stability. Simultaneously, the series oil circuit facilitates unified control. Locking and releasing of all modules can be achieved through a single hydraulic source, making operation convenient and eliminating the need to adjust each circuit separately. This reduces operational difficulty and errors, solving the problems of poor synchronization, complex oil circuits, and high leakage risk associated with traditional multi-circuit drives. It is suitable for precision machining scenarios with high requirements for locking synchronization.

[0070] In a preferred embodiment, such as Figure 9 As shown, the locking unit 4 consists of two parallel locking oil circuits, and the locking modules 41 of the two locking oil circuits are symmetrically arranged around the rotation axis of the turntable 3; the two locking oil circuits share the same oil inlet 43 and are driven by the same hydraulic source. To clearly illustrate the arrangement of the locking unit, Figure 9 The lieutenant general concealed the turntable 3, which was obscured by the locking unit, from the field of vision. Based on the embodiment in the attached figure where the locking unit 4 includes six locking modules 41, it is preferable that each locking oil circuit includes three locking modules 41, wherein the three locking modules 41 of one locking oil circuit and the locking module 41 of another locking oil circuit have the oil inlet 43 located in the middle of the two locking oil circuits.

[0071] Furthermore, to ensure the hydraulic system functions properly and establishes the hydraulic pressure required to drive piston 413, each locking oil circuit must be a closed loop or a terminally closed circuit. Therefore, specifically regarding the two parallel locking oil circuits of this application, each locking oil circuit has an inlet end connected to the hydraulic source and a sealed distal end. This distal end refers to the oil interface 4113 on the cylinder body 411 of the last locking module 41, furthest from the inlet 43. The sealing of this oil interface 4113 can employ a screw plug seal, a blind seal, a blind hole design, etc.

[0072] This application designs the locking unit 4 as two parallel and symmetrically arranged locking oil circuits, sharing a hydraulic power source and oil inlet 43. First, the parallel connection of the two oil circuits ensures pressure synchronization, and the symmetrical arrangement ensures that the locking force is evenly distributed around the locking part 32, avoiding imbalance of force on one side. For example, in the application of ultra-large turntable 3 with a diameter of more than 3 meters, the uniform locking force can effectively prevent the turntable 3 from tilting and ensure the horizontal accuracy of the worktable surface 31. Second, the dual oil circuits form a redundant design. If one oil circuit cannot work due to failure of oil pipe 42, seal failure, or other faults, the other oil circuit can still maintain the basic locking function, avoiding sudden loss of control of the turntable 3 and reducing safety risks. Especially in heavy-duty and high-risk processing scenarios, the redundant design can significantly improve the reliability of equipment operation. At the same time, the two oil circuits share a hydraulic power source and oil inlet 43, eliminating the need for additional hydraulic control components. This improves reliability while controlling equipment costs and solves the problems of low reliability and uneven force distribution in traditional single oil circuit structures.

[0073] As a preferred embodiment of this application, such as Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, the locking module 41 also includes a mounting base 419, which has a mounting portion 4191 fixedly connected to the support base 1 and a support portion 4192 for supporting and fixing the cylinder body 411. In a preferred embodiment, the mounting base 419 can be fixedly connected to the support base 1 and the cylinder body 411 respectively by bolts to ensure stable installation and detachability. By setting the mounting base 419, with its mounting portion 4191 fixed to the support base 1 and its support portion 4192 fixing the cylinder body 411, on the one hand, the mounting base 419 provides a stable installation reference for the locking module 41, ensuring that the module does not shift its position under conditions such as high-speed rotation and cutting vibration, and maintaining locking accuracy. For example, in heavy cutting, severe vibration can easily cause the module to loosen, and the mounting base 419 can effectively offset the vibration effect and ensure the locking effect. On the other hand, as an intermediate connecting component, the mounting base 419 does not require complex processing of the support base 1. The design allows for easy installation by simply pre-drilling basic mounting holes to accommodate locking modules 41 of different sizes, improving structural adaptability and reducing the processing cost of the support base 1. Furthermore, during maintenance, only the connecting parts between the mounting base 419 and the support base 1 and cylinder 411 need to be disassembled to quickly remove the locking module 41, without disassembling the turntable 3 or the entire support base 1. This significantly shortens maintenance time. For example, in continuous production line operation scenarios, rapid maintenance can reduce downtime losses, improve production efficiency, and address the problems of unstable connections, poor adaptability, and inconvenient maintenance associated with traditional locking modules.

[0074] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0075] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0076] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A multi-point locking turntable structure, characterized in that, The support base and the rotary table are rotationally connected, the rotary table comprises a workbench and a locking part, the rotary table structure further comprises a locking unit arranged around the locking part, the locking unit comprises a plurality of locking modules, the plurality of locking modules are driven by a hydraulic source to synchronously generate locking force at multiple points around the locking part; The locking part is arranged in the shape of a shaft coaxial with the rotary axis of the rotary table, and an annular locking groove is formed around the outer circumferential surface of the locking part; The locking module comprises a cylinder body and an elastic clamping sheet, the cylinder body is provided with at least one piston cavity and an oil channel for distributing hydraulic oil between the piston cavities, the piston cavities pass through the two working surfaces of the cylinder body, and two pistons are arranged in each piston cavity, the cylinder body is embeddedly installed in the annular locking groove, and the working surface of the clamping sheet is opposite to the groove wall of the annular locking groove, so that the locking force is applied to the groove wall; The clamping sheet is arranged corresponding to the movement direction of the piston and located between the piston and the locking part, one end of the clamping sheet is fixedly connected with the cylinder body through a connecting piece, and the main body part of the clamping sheet overhangs and covers the open end of the piston cavity, so as to form a cantilever beam structure; When the oil channel is filled with hydraulic oil, the pistons are driven to extend out of the piston cavities, the overhanging part of the clamping sheet is acted on, the clamping sheet is forced to elastically deform and press the locking part, and multi-point synchronous locking is realized, the two pistons in the same piston cavity move in opposite directions and respectively push the clamping sheets arranged on the two working surfaces of the cylinder body to press the locking part from two directions at the same time, the locking part is provided with an upper clamping surface and a lower clamping surface opposite to each other, the cylinder body is arranged between the upper clamping surface and the lower clamping surface, the clamping sheets on the two working surfaces are respectively upper clamping sheets and lower clamping sheets, the upper clamping sheets press the upper clamping surface upward, and the lower clamping sheets press the lower clamping surface downward at the same time; When the oil channel is depressurized, the clamping sheet is reset by its own elasticity.

2. The multi-point detent locked turntable structure of claim 1, wherein, The end faces of the two pistons in the same piston cavity are provided with protrusions opposite to each other, after the oil channel is depressurized, the two pistons move towards each other under the elastic restoring force of the clamping sheet and abut against each other through the protrusions to maintain the oil gap between the two pistons in communication with the oil channel.

3. The multi-point detent locked turntable structure of claim 1, wherein, The rotary table structure further comprises an auxiliary reset assembly, the auxiliary reset assembly comprises a spring fixing plate fixed with the cylinder body and a spring mounting plate elastically connected with the spring fixing plate through a spring, and the spring mounting plate abuts against the clamping sheet; When the clamping sheet is elastically deformed by the piston, the spring is compressed through the spring mounting plate at the same time, and when the oil channel is depressurized, the elastic force of the spring helps reset the clamping sheet.

4. The multi-point detent gimbals structure of claim 1, wherein, The cylinder bodies of the plurality of locking modules are connected in series through oil pipes to form a continuous locking oil circuit.

5. The multi-point detent locked turntable structure of claim 4, wherein, The locking unit is composed of two parallel locking oil circuits, and the locking modules of the two locking oil circuits are symmetrically arranged around the rotary axis of the rotary table, and the two locking oil circuits share the same oil inlet and are driven by the same hydraulic source.

6. The multi-point detent gimbals structure of claim 1, wherein, The locking module further comprises a mounting seat having a mounting portion fixedly connected with the support seat and a support portion for supporting and fixing the cylinder body.

Images