A turntable device and machine tool

Abstract

The utility model relates to the field of machine tool, concretely relates to a rotary table device and machine tool, and the rotary table device includes the accommodating groove on the base, the workstation is installed on the base, and is connected with the connecting shaft of the workstation and is inserted in the accommodating groove, and the brake assembly for locking the workstation is arranged in the accommodating groove. The detection assembly is arranged on the base, and the detection assembly includes the detection module and the indication module, the pressure detection channel that communicates with the first oil cavity is arranged on the base, the detection module is arranged in the pressure detection channel, and the indication module sends the indication signal under the state that the detection module is subjected to the oil pressure. According to the indication signal, the operator can clearly know whether the workstation is locked and whether it is in the state of not rotatable, so that the workstation can be used for processing high-precision products.

Description

Technical Field

[0001] This utility model relates to the field of machine tools, and more specifically, to a rotary table device and a machine tool. Background Technology

[0002] Turntables, as key devices capable of rotating objects or working parts around a specific axis, have wide and important applications. However, traditional turntables face a series of problems that urgently need to be solved in practical use; for example, monitoring the turntable's operational status.

[0003] In terms of operational status monitoring, traditional turntable devices lack effective monitoring methods. Operators find it difficult to understand the real-time and accurate operating status of the turntable braking system, such as changes in oil pressure during braking. This leads to the inability to detect and take appropriate measures in a timely manner when abnormalities occur in the braking system, such as insufficient oil pressure or leaks, thereby increasing the risk of equipment failure and affecting the continuity and stability of production. At the same time, due to the lack of an effective monitoring and indication mechanism, operators have difficulty judging whether the turntable is in a safe braking state, increasing the complexity and uncertainty of operation.

[0004] Therefore, how to determine the effective operating status of the turntable device's braking system is a technical problem that needs to be further solved by those skilled in the art. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a rotary table device and a machine tool.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A first aspect of this utility model provides a turntable device, comprising:

[0008] The base has a receiving groove;

[0009] The worktable is rotatably mounted on the base;

[0010] A connecting shaft, one end of which is fixedly connected to the worktable, and the other end is inserted into the receiving groove;

[0011] A braking assembly is disposed in a receiving groove. The braking assembly includes a brake cylinder and a brake piston. The brake cylinder is fixed on the base. The brake piston is disposed in the brake cylinder and can move along the axial direction of the connecting shaft, forming a first oil chamber with the brake cylinder. When there is pressurized oil in the first oil chamber, the connecting shaft engages or disengages from the base through the brake piston.

[0012] The detection component is mounted on the base and includes a detection module and an indicator module. The base is also provided with a pressure detection channel, which is connected to the first oil chamber. The detection module is located inside the pressure detection channel, and the indicator module sends an indicator signal based on the signal from the detection module.

[0013] Furthermore, the indicator module also includes:

[0014] The first indicator module is mounted on the base. When the detection module detects the presence of pressurized oil in the pressure detection channel, the first indicator module issues a first indicator signal.

[0015] The second indicator module is mounted on the base. When the detection module detects that there is no pressure oil in the pressure detection channel, the second indicator module issues a second indicator signal.

[0016] Furthermore, the detection module includes:

[0017] The elastic component is located within the pressure detection channel;

[0018] The detection component is connected to the elastic component. When there is pressurized oil in the pressure detection channel, the detection component is opposite to the first indicating module, and the first indicating module generates a first indicating signal. When there is no pressurized oil in the pressure detection channel, the detection component is opposite to the second indicating module, and the second indicating module generates a second indicating signal.

[0019] Furthermore, the extension direction of the pressure detection channel is perpendicular to the axis of the connecting shaft, and the first indicator module and the second indicator module are arranged side by side along the extension direction of the pressure detection channel, with the first indicator module located on the side away from the base relative to the second indicator module.

[0020] Furthermore, the braking assembly also includes:

[0021] The first brake pad is fixedly mounted on the outer edge of the brake cylinder;

[0022] The second brake pad is fixedly mounted on the connecting shaft and located inside the brake cylinder. The first brake pad and the second brake pad are positioned opposite each other.

[0023] The brake piston divides the brake cylinder into a second oil chamber and a first oil chamber. The brake cylinder is provided with a first oil passage and a second oil passage. The first oil passage connects to the first oil chamber, and the second oil passage connects to the second oil chamber. When there is pressurized oil in the first oil chamber, the brake piston engages with the first brake pad and the second brake pad. When there is pressurized oil in the second oil chamber, the brake piston separates from the first brake pad and the second brake pad.

[0024] Furthermore, the turntable device also includes:

[0025] The encoder includes a reading head on the outer ring and a scale on the inner ring. The reading head is fixed on the base, and the scale is fixedly connected to the connecting shaft. The reading head and the scale work together to read the angle of rotation of the connecting shaft.

[0026] The driver, connected to the reading head, is used to receive the angle signal read by the reading head.

[0027] Furthermore, the turntable device also includes a support structure, which includes:

[0028] The first bearing is located on the side of the base near the worktable. The outer side of the first bearing is fixedly connected to the base, and the inner side of the first bearing is connected to the connecting shaft.

[0029] The second bearing is located on the side of the base away from the worktable. The outer side of the second bearing is fixedly connected to the base, and the inner side of the second bearing is connected to the connecting shaft.

[0030] Furthermore, the turntable device also includes a sealing structure, which includes a sealing cover. The outer side of the sealing cover is fixed to the base, and the connecting shaft passes through the inner side of the sealing cover. The worktable and the sealing cover form an air curtain cavity, and a sealing ring is provided inside the air curtain cavity. An air curtain channel for ventilation into the air curtain cavity is provided on the base.

[0031] A second aspect of this utility model provides a machine tool, including a base, a column, a spindle component, and a turntable device of any one of the above. The column and the turntable device are disposed on both sides of the base, and the spindle component is disposed on the column, with the working end of the spindle component facing the worktable of the turntable device.

[0032] Furthermore, the machine tool also includes a controller, which is connected to the detection module and the indicator module of the detection component. The controller is used to send corresponding indicator signals to the indicator module according to the signals from the detection module; the controller is also used to control the movement of the spindle component according to the signals from the detection module.

[0033] The beneficial effects of this utility model are as follows: A receiving groove is provided on the base, the worktable is mounted on the base, and the connecting shaft connected to the worktable is inserted into the receiving groove. A braking component for locking the worktable is provided in the receiving groove. A detection component is provided on the base, including a detection module and an indicator module. A pressure detection channel communicating with the first oil chamber is provided on the base. The detection module is located in the pressure detection channel. When the detection module is under oil pressure, it connects to the indicator module, and the indicator module sends an indicator signal. According to the indicator signal, the operator can clearly know whether the worktable is locked or in a non-rotatable state, so that the worktable can be used to process high-precision products. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0035] Figure 1 This is a schematic diagram of the structure of the turntable device of this utility model;

[0036] Figure 2 This is a cross-sectional view of the braking assembly of the turntable device of this utility model;

[0037] Figure 3 This is a partially enlarged view of the braking assembly of this utility model;

[0038] Figure 4 This is a cross-sectional structural diagram of the detection component of the turntable device of this utility model.

[0039] The attached figures are labeled as follows:

[0040] 10-Base, 11-Receiving tank, 12-Pressure detection channel;

[0041] 20 - Workbench;

[0042] 30 - Connecting shaft;

[0043] 40-Brake assembly, 41-Brake cylinder, 411-First cylinder assembly, 4111-First protruding structure, 412-Second cylinder assembly, 42-Brake piston, 421-Second protruding structure, 43-First brake pad, 44-Second brake pad;

[0044] 50 - Detection component, 51 - Detection module, 511 - Elastic component, 512 - Detection component, 52 - Indicator module, 521 - First indicator module, 522 - Second indicator module;

[0045] 60-encoder;

[0046] 70 - Support structure, 71 - First bearing, 72 - Second bearing;

[0047] 80-Sealing structure, 81-Sealing cover, 82-Sealing ring, 83-Air curtain channel;

[0048] 90 - Drive components;

[0049] A - First oil chamber, B - Second oil chamber, C - First oil passage, D - Second oil passage. Detailed Implementation

[0050] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0051] refer to Figure 1 , Figure 2 and Figure 3 The first aspect of this utility model provides a turntable device, including a base 10, a worktable 20, a connecting shaft 30, a braking assembly 40, and a detection assembly 50. A receiving groove 11 is provided at the center of the base 10. The worktable 20 is a circular or square flat plate structure and is rotatably mounted on the base 10 via bearings. The connecting shaft 30 is a solid cylindrical shaft, one end of which is fixedly connected to the center of the worktable 20 by bolts, and the other end is inserted into the receiving groove 11 of the base 10.

[0052] The braking assembly 40 is disposed within the receiving groove 11. The braking assembly 40 includes a brake cylinder 41 and a brake piston 42. The brake cylinder 41 is bolted to the base 10 and is annular. The brake piston 42 is movably disposed within the brake cylinder 41 along the axial direction of the connecting shaft 30, forming a first oil chamber A between the brake piston 42 and the brake cylinder 41. When hydraulic oil is introduced into the first oil chamber A, the brake piston 42 moves along the axial direction of the connecting shaft 30 under the action of the hydraulic oil. The connecting shaft 30 engages with the base 10 through the brake piston 42, thereby braking the worktable 20. When the first oil chamber A is depressurized, the connecting shaft 30 separates from the base 10, and the worktable 20 can rotate freely.

[0053] The detection component 50 is mounted on the base 10. The detection component 50 includes a detection module 51 and an indicator module 52. A pressure detection channel 12 is also provided on the base 10. The detection module 51 uses a pressure sensor and is installed within the pressure detection channel 12, which is connected to the first oil chamber A via a pipe. The indicator module 52 uses an indicator light. When the detection module 51 detects that the pressure in the first oil chamber A reaches the braking pressure value, it sends a signal to the indicator module 52, causing the indicator light to illuminate, indicating to the operator that the braking component 40 is in braking mode. When the pressure in the first oil chamber A is lower than the set value, the indicator light goes out, indicating that the braking component 40 has been released.

[0054] Of course, in other embodiments, when hydraulic oil is introduced into the first oil chamber A, the base 10 separates from the connecting shaft 30, and the worktable 20 can rotate freely. At this time, the detection module 51 sends a signal to the indicator module 52, and the indicator light of the indicator module 52 lights up, indicating that the braking component 40 has been released from braking. When the first oil chamber A is depressurized, the connecting shaft 30 engages with the base 10 through the brake piston 42, thereby braking the worktable 20. At this time, the indicator light goes out, indicating to the operator that the braking component 40 is in the braking state.

[0055] In some implementations, reference Figure 3 and Figure 4 The indicator module 52 includes a first indicator module 521 and a second indicator module 522, both of which can be set as indicator lights. When the detection module 51 detects that there is pressurized oil in the pressure detection channel 12, that is, there is pressurized oil in the first oil chamber A, indicating that the braking assembly 40 is in a possible braking or braking state, the first indicator module 521 emits a first indicator signal that lights up, while the second indicator module 522 does not light up, prompting the operator to pay attention to the braking status.

[0056] When the detection module 51 detects that there is no pressurized oil in the pressure detection channel 12, that is, no pressurized oil in the first oil chamber A, and the braking assembly 40 is in the released braking state, the second indicator module 522 emits a lit second indicator signal to inform the operator that the worktable 20 can rotate freely. Through this dual indicator signal design, the operator can more intuitively and clearly understand the braking status of the turntable device, improving the safety and convenience of equipment operation.

[0057] In addition, the first indicator module 521 and the second indicator module 522 can be configured as traffic lights. When the detection module 51 detects the presence of pressurized oil in the pressure detection channel 12, the first indicator module 521 issues a green light as a first indicator signal. When the detection module 51 detects the absence of pressurized oil in the pressure detection channel 12, the second indicator module 522 issues a red light as a second indicator signal.

[0058] In some implementations, reference Figure 2 , Figure 3 and Figure 4 The detection module 51 includes an elastic component 511 and a detection component 512. The elastic component 511 is a spring, located within the pressure detection channel 12 near the connection port of the first oil chamber A. A stop is provided on the side of the spring near the connecting shaft 30, which seals the pressure detection channel 12 to prevent hydraulic oil leakage. When pressurized oil is present in the pressure detection channel 12, the hydraulic oil pushes the stop, causing the spring to compress. The detection component 512 is for signal sensing with the indicating module 52; for example, the detection component 512 can be configured as a magnetic metal slider connected to one end of the elastic component 511, which can slide axially within the pressure detection channel 12.

[0059] When there is pressurized oil in the pressure detection channel 12, that is, when there is pressurized oil in the first oil chamber A, the pressure of the hydraulic oil pushes the elastic component 511 to move towards the first indicating module 521 until it is opposite to the first indicating module 521. At this time, the first indicating module 521 detects the magnetic signal of the detection component 512, generates a first indicating signal and lights up the indicator light, prompting the operator that the braking component 40 is in a braking-related state.

[0060] When there is no pressurized oil in the pressure detection channel 12, that is, when there is no pressurized oil in the first oil chamber A, the elastic component 511 pulls the detection component 512 back using its own elastic force, so that it is aligned with the second indicator module 522. After the second indicator module 522 detects the magnetic signal of the detection component 512, it generates a red second indicator signal and illuminates the indicator light, informing the operator that the braking component 40 has been released and the worktable 20 can rotate normally. This design allows the operator to quickly and accurately judge the braking status of the turntable device, effectively improving production efficiency and equipment operation safety.

[0061] In some implementations, reference Figure 2 , Figure 3 and Figure 4 The pressure detection channel 12 extends perpendicularly to the axis of the connecting shaft 30. The first indicator module 521 and the second indicator module 522 are arranged side-by-side on the outer wall of the base 10 along the extension direction of the pressure detection channel 12. Furthermore, the first indicator module 521 is located on the side furthest from the center of the base 10 relative to the second indicator module 522. This arrangement allows the operator to clearly observe the status of the indicator lights from a distance. When the detection component 512 is not subjected to oil pressure, it maintains its initial position, meaning that the detection component 512 and the second indicator module 522 are relative or approximately aligned. The second indicator module 522 can sense the detection component 512, and at this time, the second indicator module 522 illuminates. When pressurized oil is present in the pressure detection channel 12, the oil pressure pushes the elastic component 511, causing the detection component 512 to move away from the connecting shaft 30, so that the detection component 512 is opposite to the first indicator module 521, allowing the first indicator module 521 to detect the detection component 512. At this time, the first indicator module 521 illuminates, and the second indicator module 522 turns off. This design allows operators to more intuitively and conveniently judge the braking status of the turntable device, effectively improving equipment operation efficiency and safety during the production process.

[0062] In some implementations, reference Figure 2 and Figure 3The braking assembly 40 includes a first brake pad 43 and a second brake pad 44. An annular groove is provided on the end face of the brake cylinder 41. The brake piston 42 is movably disposed within the cylinder groove along the axial direction of the connecting shaft 30. The inner diameter of the brake piston 42 is tightly fitted against the inner wall of the cylinder groove, and the outer diameter of the brake piston 42 is tightly fitted against the outer wall of the cylinder groove. A seal can be provided between the brake piston 42 and the side wall of the cylinder for sealing. A first oil chamber A and a second oil chamber B are formed between the brake piston 42 and the cylinder groove, respectively. The first oil chamber A is located on the side of the brake piston 42 away from the worktable 20, and the second oil chamber B is located on the side of the brake piston 42 closer to the worktable 20.

[0063] Further, the brake cylinder 41 includes a first cylinder assembly 411 and a second cylinder assembly 412. A first protruding structure 4111 is provided on one side of the first cylinder assembly 411; a second protruding structure 421 is provided on one side of the brake piston 42. The second cylinder assembly 412 has an L-shaped structure, and the first cylinder assembly 411 is disposed on one side of the first cylinder assembly 411, forming a cylinder groove with the second cylinder assembly 412. The lower surface of the brake piston 42, the left sidewall of the cylinder body, the right sidewall of the cylinder body, and the bottom surface of the cylinder body (see reference) Figure 3 The first oil chamber A is formed by the direction of the first protruding structure 4111, the upper surface of the second protruding structure 421, the brake piston 42, and the first cylinder assembly 411 (reference). Figure 3 The direction) surrounds the second oil cavity B.

[0064] The first brake pad 43 is fixedly mounted on the outer edge of the brake cylinder 41. In this embodiment, part of the first brake pad 43 is fixedly mounted on the first cylinder assembly 411, while the other part is suspended above the cylinder groove. The second brake pad 44 is fixedly mounted on the connecting shaft 30, with part of the second brake pad 44 located above the cylinder groove and opposite to it. A first oil passage C and a second oil passage D are provided on the brake cylinder 41. The first oil passage C connects the first oil chamber A to the external oil supply system; the second oil passage D connects the second oil chamber B to the external oil supply system. The external oil supply system uses a hydraulic pump, which can provide stable oil pressure.

[0065] When the turntable is working normally, the external oil supply system does not supply oil to the first oil chamber A and the second oil chamber B. At this time, the brake piston 42 is in the initial position, maintaining a certain gap with the first brake pad 43 and the second brake pad 44, and no friction is generated. The worktable 20 rotates normally under the drive of the drive component 90.

[0066] When the worktable 20 needs to be stopped, the external oil supply system supplies oil to the first oil chamber A through the first oil passage C. As the oil pressure increases, the brake piston 42 moves towards the side closer to the worktable 20 under the action of the oil pressure, gradually contacting the first brake pad 43 and the second brake pad 44 and generating friction. The friction gradually increases, causing the rotational speed of the worktable 20 to gradually decrease until it comes to a complete stop.

[0067] When it is necessary to resume the rotation of the worktable 20, the external oil supply system stops supplying oil to the first oil chamber A and supplies oil to the second oil chamber B through the second oil passage D. Under the action of oil pressure, the brake piston 42 moves away from the worktable 20, disconnects from the first brake pad 43 and the second brake pad 44, the friction disappears, and the worktable 20 can start rotating again under the drive of the drive component 90.

[0068] Through the design and operation of the braking component 40 described above, the turntable device can achieve fast and reliable braking or stopping functions, ensuring the safety and stability of the equipment during operation.

[0069] In other embodiments, positioning structures are provided on the facing surfaces of the brake piston 42 and the first brake pad 43 and the second brake pad 44. For example, a protruding structure is provided on the brake piston 42, and a groove structure is provided on the first brake pad 43 and the second brake pad 44. When the worktable 20 stops rotating, the protruding structure on the brake piston 42 is inserted into the groove on the first brake pad 43 and the second brake pad 44, thereby fixing the position of the worktable 20 relative to the base 10. In this embodiment, the worktable 20 can avoid or reduce shaking during processing, which is convenient for processing products with high precision requirements.

[0070] In some implementations, reference Figure 2 and Figure 3 The turntable device also includes an encoder 60 and a driver (not shown in the figure), wherein the encoder 60 and the driver are paired to acquire and control the rotation angle of the worktable 20. A dedicated mounting area is provided on the base 10 for fixing the reading head of the encoder 60. The encoder 60 includes a reading head and a scale. The reading head is fixed to the base 10 and precisely positioned by a locating pin to ensure the relative positional accuracy between the reading head and the scale. The reading head internally houses a photoelectric sensor and signal processing circuitry, capable of converting the engraved information on the scale into electrical signals.

[0071] The scale is engraved with high-precision lines and is fixedly sleeved on the connecting shaft 30 by a high-precision threaded connection and locating pin, rotating synchronously with the connecting shaft 30. The driver can use a high-performance digital signal processor (DSP) as the core control unit. The driver communicates with the reading head of the encoder 60 and can receive the angle signal read by the reading head in real time.

[0072] When the power to the drive unit 90 is turned on, the connecting shaft 30 rotates smoothly under the support of the support structure 70, causing the worktable 20 and the scale of the encoder 60 to rotate together. At this time, the reading head of the encoder 60 starts to work. The photoelectric sensor inside the reading head detects the engraving information on the scale in real time and converts the engraving information into electrical signals. These electrical signals are transmitted to the driver through a high-speed serial communication interface.

[0073] The encoder 60 continuously reads the rotation angle of the connecting shaft 30 and feeds the angle signal back to the driver. The driver then sends the acquired angle signal to the host computer, which can then control the drive component 90 based on the acquired angle signal, forming a closed-loop control system. Through continuous comparison and adjustment, the rotation angle of the worktable 20 is ultimately made to accurately reach the preset value.

[0074] After the worktable 20 reaches the preset rotation angle, it enters the normal operation stage. At this time, the encoder 60 continues to monitor the rotation angle of the connecting shaft 30 in real time and feeds the angle signal back to the driver and the host computer. The host computer can display and record the rotation angle of the worktable 20 in real time, so that the operator can understand the operating status of the worktable 20 at any time. At the same time, the driver can analyze and process the angle signal fed back by the encoder 60; for example, it can detect whether there is abnormal vibration or angle deviation of the worktable 20 during operation. If an abnormality is detected, the driver will send an alarm signal to the host computer in a timely manner. The host computer can take corresponding measures based on the alarm information, such as stopping the operation of the worktable 20 or performing fault diagnosis.

[0075] When it is necessary to stop the rotation of the worktable 20, the host computer sends a braking (or braking) command to the driver. The driver controls the braking assembly 40 to work, causing the brake piston 42 to contact the brake pads and generate friction, thereby gradually decelerating the worktable 20 until it stops. During the braking process, the encoder 60 continues to monitor the rotation angle of the connecting shaft 30 and feeds the angle signal back to the driver and the host computer to ensure that the worktable 20 can stop accurately at the preset position.

[0076] After the worktable 20 stops, the encoder 60 continues to monitor the rotation angle of the connecting shaft 30 to prevent the worktable 20 from rotating slightly due to external interference while stationary. If a slight rotation of the worktable 20 is detected, the driver will promptly adjust the braking force of the braking assembly 40 to maintain the worktable 20 at rest. Through the above-described operation of the encoder 60 and the driver, this rotary table device can achieve precise measurement and control of the rotation angle of the worktable 20, improving the processing accuracy and reliability of the equipment.

[0077] In some implementations, reference Figure 2 and Figure 3This rotary table device is designed to achieve stable and precise rotation of the worktable 20 to meet the needs of various precision machining and testing scenarios. The rotary table device also includes a support structure 70. The support structure 70 plays a crucial role in ensuring the stable operation of the connecting shaft 30 and the worktable 20.

[0078] The support structure 70 includes a first bearing 71 and a second bearing 72. The first bearing 71 is selected to provide axial and radial support for the turntable device. This first bearing 71 has advantages such as a low coefficient of friction, high limiting speed, and simple structure. The first bearing 71 is positioned on the base 10 near the worktable 20. The outer side of the first bearing 71 is fixedly connected to the mounting hole of the base 10 using an interference fit. The inner side of the first bearing 71 is clearance-fitted to the connecting shaft 30, ensuring flexible rotation between the inner ring of the bearing and the connecting shaft 30 while preventing excessive clearance that could lead to vibration.

[0079] The second bearing 72 is selected to withstand a large radial load and is suitable for supporting the connecting shaft 30 on the side away from the worktable 20 in this turntable device. The outer side of the second bearing 72 is interference-fitted with the mounting hole of the base 10, and the inner side of the first bearing 71 is clearance-fitted with the connecting shaft 30.

[0080] When the power to the drive component 90 (servo motor) is turned on, the motor starts running, transmitting power to the connecting shaft 30 via the coupling. Supported by the first bearing 71 and the second bearing 72, the connecting shaft 30 rotates smoothly, driving the worktable 20 to rotate as well. In the initial startup phase, due to the inertia of the worktable 20 and the connecting shaft 30, the motor needs to provide a large torque to overcome this inertia and allow the worktable 20 to reach the set speed. At this time, the first bearing 71 and the second bearing 72 primarily bear the radial load, effectively distributing and bearing these loads to ensure the stable rotation of the connecting shaft 30.

[0081] After the worktable 20 reaches the set speed, it enters the normal operation stage. At this time, the drive component 90 precisely controls the speed and direction of the worktable 20 according to the preset program. The first bearing 71 and the second bearing 72 continue to provide support, ensuring that the connecting shaft 30 maintains a stable rotational state during operation. Since the worktable 20 may be subject to some external disturbances during rotation, such as cutting forces and vibrations, the first bearing 71 and the second bearing 72 can absorb and buffer these disturbances through their own elastic deformation, reducing the impact on the rotational accuracy of the worktable 20.

[0082] During braking, the connecting shaft 30 is subjected to significant axial and radial forces. The first bearing 71 and the second bearing 72 effectively withstand these forces, preventing axial movement and radial displacement of the connecting shaft 30, thus ensuring the smoothness and safety of the braking process. Simultaneously, the detection component 50 monitors relevant parameters during braking in real time, such as brake pressure and the rotational speed of the worktable 20, and feeds the data back to the control system for timely adjustments to the braking strategy.

[0083] Through the design and operation of the above support structure 70, this turntable device can ensure that the worktable 20 maintains a stable rotation state in all stages such as start-up, operation, braking and restart, thereby improving the reliability and processing accuracy of the equipment.

[0084] In some implementations, reference Figure 2 and Figure 3 During operation, this rotary table device needs to effectively prevent external dust and impurities from entering the device and affecting the normal operation and accuracy of key components such as the worktable 20 and connecting shaft 30. Therefore, a sealing structure 80 has been added to the rotary table device to improve its sealing performance and reliability.

[0085] Specifically, the sealing structure 80 includes a sealing cover 81, which is annular in shape. The outer side of the sealing cover 81 is fixed to the mounting area of ​​the base 10 by multiple bolts to ensure a tight connection between the sealing cover 81 and the base 10. A closing ring is provided along the edge of the back of the worktable 20. The closing ring, the back of the worktable 20, and the sealing cover 81 form a closed air curtain cavity. A sealing ring 82, such as a V-shaped sealing ring 82, is provided in the air curtain cavity for sealing.

[0086] An air curtain channel 83, communicating with the air curtain cavity, is provided on the base 10. Clean gas is introduced into the air curtain cavity through the air curtain channel 83, forming an air curtain inside the cavity to further prevent external dust and other impurities from entering the device. When the connecting shaft 30 rotates, the sealing ring 82 seals, preventing external dust and impurities from entering the air curtain cavity. By setting this sealing structure 80, this turntable device effectively prevents external dust and impurities from entering the device during actual operation, ensuring the cleanliness and normal operation of key components such as the worktable 20 and the connecting shaft 30, extending the service life of the device, and reducing maintenance costs.

[0087] A second aspect of the present invention provides a machine tool, including a base, a column, a spindle assembly, and a turntable device of any one of the above. The column and the turntable device are disposed on both sides of the base, the spindle assembly is disposed on the column, and the working end of the spindle assembly faces the worktable 20 of the turntable device.

[0088] The base provides a stable mounting foundation for the column and rotary table assembly. The column is a rectangular column, securely connected to the base by multiple high-strength bolts. Guide rails are installed on the column to ensure smooth and precise vertical movement of the spindle assembly. The working end of the spindle assembly faces the worktable of the rotary table assembly. During machining, the spindle drives the cutting tool to rotate, cutting the workpiece placed on the worktable. The rotary table assembly is mounted on the other side of the base, opposite the column.

[0089] In actual machining, the operator places the automotive parts to be processed on the turntable and adjusts the workpiece to a suitable machining position by controlling the turntable. Then, the operator operates the spindle assembly, causing its working end to drive the cutting tool to cut the workpiece. During machining, the turntable can be braked and rotated as needed to achieve multi-faceted machining.

[0090] In some implementations, reference Figure 2 and Figure 3 The machine tool also includes a controller, which is a high-performance programmable logic controller (PLC) connected to the detection module 51 and indicator module 52 of the detection component via cables, and is also connected to the drive system of the spindle component.

[0091] When the brake assembly 40 of the turntable device is in the braking state and there is pressurized oil in the first oil chamber A, the hydraulic oil pressure in the pressure detection channel 12 pushes the detection component 512 to overcome the elastic force of the elastic component 511 and move towards the first indicator module 521 until it is opposite to the first indicator module 521. After the detection module 51 detects the change in position of the detection component 512, it transmits the corresponding electrical signal to the controller. After receiving the signal, the controller immediately sends an indicator signal to the first indicator module 521, and the light on the first indicator module 521 illuminates, indicating to the operator that the brake assembly 40 is in the braking-related state, the worktable is locked, and cannot be rotated.

[0092] When the operator needs to input a command through the control panel to release the brake on the turntable, the controller receives the command and depressurizes the hydraulic system, removing pressure oil from the first oil chamber A. At this time, the elastic component 511 uses its own elasticity to pull the detection component 512 back, aligning it with the second indicating module 522. The detection module 51 detects the position change of the detection component 512 again and transmits the signal to the controller. The controller sends an indicator signal to the second indicating module 522, causing the indicator light on the second indicating module 522 to illuminate, informing the operator that the brake assembly 40 has been released and the worktable can rotate normally.

[0093] During machining, the detection module 51 continuously monitors the braking status of the turntable and transmits the signal to the controller in real time. When the controller detects that the turntable has been released from braking and the worktable is stable, it issues a command to start the spindle assembly to the drive system of the spindle assembly according to the preset machining program. The spindle assembly begins to rotate, driving the cutting tool to cut the aerospace parts placed on the worktable 20. If, during machining, the detection module 51 detects abnormal braking of the turntable or instability of the worktable 20, it immediately transmits a signal to the controller. The controller quickly issues a command to stop the spindle assembly to ensure machining safety and avoid workpiece damage or personnel injury due to equipment failure.

[0094] Through the coordinated operation of the controller, detection component 50, and spindle components, the machine tool can accurately monitor and indicate the braking status of the turntable device, as well as intelligently control the movement of the spindle components, greatly improving the machining accuracy, safety, and automation level of the machine tool, and meeting the high-precision and high-reliability machining requirements of aerospace parts.

[0095] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A turntable device, characterized in that, include: The base (10) has a receiving groove (11); The worktable (20) is rotatably mounted on the base (10); A connecting shaft (30) is provided, one end of which is fixedly connected to the worktable (20), and the other end is inserted into the receiving groove (11). A braking assembly (40) is disposed in the receiving groove (11). The braking assembly (40) includes a brake cylinder (41) and a brake piston (42). The brake cylinder (41) is fixed on the base (10). The brake piston (42) is disposed in the brake cylinder (41) and is movable along the axial direction of the connecting shaft (30). It forms a first oil chamber (A) with the brake cylinder (41). When there is pressurized oil in the first oil chamber (A), the connecting shaft (30) is engaged or disengaged from the base (10) through the brake piston (42). A detection component (50) is disposed on the base (10). The detection component (50) includes a detection module (51) and an indicator module (52). A pressure detection channel (12) is also disposed on the base (10). The pressure detection channel (12) is connected to the first oil chamber (A). The detection module (51) is disposed in the pressure detection channel (12). The indicator module (52) issues an indicator signal according to the signal from the detection module (51).

2. The turntable device according to claim 1, characterized in that, The indicator module (52) further includes: A first indicator module (521) is disposed on the base (10). When the detection module (51) detects that there is pressurized oil in the pressure detection channel (12), the first indicator module (521) issues a first indicator signal. The second indicator module (522) is disposed on the base (10). When the detection module (51) detects that there is no pressure oil in the pressure detection channel (12), the second indicator module (522) issues a second indicator signal.

3. The turntable device according to claim 2, characterized in that, The detection module (51) includes: An elastic component (511) is disposed within the pressure detection channel (12); The detection component (512) is connected to the elastic component (511). When there is pressurized oil in the pressure detection channel (12), the detection component (512) is opposite to the first indicator module (521), and the first indicator module (521) generates the first indicator signal. When there is no pressurized oil in the pressure detection channel (12), the detection component (512) is opposite to the second indicator module (522), and the second indicator module (522) generates the second indicator signal.

4. The turntable device according to claim 3, characterized in that, The extension direction of the pressure detection channel (12) is perpendicular to the axis of the connecting shaft (30). The first indicator module (521) and the second indicator module (522) are arranged side by side along the extension direction of the pressure detection channel (12), and the first indicator module (521) is located on the side away from the base (10) relative to the second indicator module.

5. The turntable device according to claim 4, characterized in that, The braking assembly (40) also includes: The first brake pad (43) is fixedly disposed on the outer edge of the brake cylinder (41); The second brake pad (44) is fixedly mounted on the connecting shaft (30) and located inside the brake cylinder (41). The first brake pad (43) and the second brake pad (44) are arranged opposite to each other. The brake piston (42) divides the brake cylinder (41) into a second oil chamber (B) and a first oil chamber (A). The brake cylinder (41) is provided with a first oil passage (C) and a second oil passage (D). The first oil passage (C) connects to the first oil chamber (A), and the second oil passage (D) connects to the second oil chamber (B). When there is pressurized oil in the first oil chamber (A), the brake piston (42) engages with the first brake pad (43) and the second brake pad (44). When there is pressurized oil in the second oil chamber (B), the brake piston (42) separates from the first brake pad (43) and the second brake pad (44).

6. The turntable device according to any one of claims 1-5, characterized in that, Also includes: The encoder (60) includes a reading head located on the outer ring and a scale located on the inner ring. The reading head is fixed on the base (10), and the scale is fixedly connected to the connecting shaft (30). The reading head and the scale cooperate to read the angle of rotation of the connecting shaft (30). A driver, connected to the reading head, is used to receive the angle signal read by the reading head.

7. The turntable device according to any one of claims 1-5, characterized in that, It also includes a support structure (70), which comprises: A first bearing (71) is disposed on the side of the base (10) near the worktable (20). The outer side of the first bearing (71) is fixedly connected to the base (10), and the inner side of the first bearing (71) is connected to the connecting shaft (30). The second bearing (72) is disposed on the side of the base (10) away from the worktable (20). The outer side of the second bearing (72) is fixedly connected to the base (10), and the inner side of the second bearing (72) is connected to the connecting shaft (30).

8. The turntable device according to any one of claims 1-5, characterized in that, It also includes a sealing structure (80), which includes a sealing cover (81). The outer side of the sealing cover (81) is fixed on the base (10). The connecting shaft (30) passes through the inner side of the sealing cover (81). The worktable (20) and the sealing cover (81) form an air curtain cavity. A sealing ring (82) is provided in the air curtain cavity. An air curtain channel (83) for venting air into the air curtain cavity is provided on the base (10).

9. A machine tool, characterized in that, The device includes a base, a column, a spindle assembly, and a turntable device as described in any one of claims 1-8. The column and the turntable device are disposed on both sides of the base, and the spindle assembly is disposed on the column. The working end of the spindle assembly faces the worktable (20) of the turntable device.

10. The machine tool according to claim 9, characterized in that, It also includes a controller, which is connected to the detection module (51) and the indicator module (52) of the detection component (50). The controller is used to send a corresponding indicator signal to the indicator module (52) according to the signal of the detection module (51). The controller is also used to control the operation of the spindle component according to the signal of the detection module (51).

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