Swivel table and numerical control vertical lathe

Abstract

The application discloses a rotary table and a numerical control vertical lathe, and belongs to the technical field of machining, and mainly aims at cooling driving assemblies and transmission assemblies. The main technical scheme of the application is as follows: the rotary table comprises a rotating disc, a transmission base and a multistage lubricating system; the rotating disc is rotationally connected to the top end of the transmission base; the transmission base is internally provided with a driving assembly, a transmission assembly and a rotary shaft assembly; the driving assembly is in transmission connection with the transmission assembly; the rotary shaft assembly is connected with the rotating disc and the transmission assembly respectively to drive the rotating disc to rotate; the multistage lubricating system is connected with the driving assembly and the transmission assembly respectively, and is used for driving lubricating oil, whose temperature is regulated by a cooling control system, to form circulation in the driving assembly and the transmission assembly respectively, so that the driving assembly and the transmission assembly can be cooled.

Description

Technical Field

[0001] This application belongs to the field of machining technology, specifically relating to a rotary worktable and a CNC vertical lathe. Background Technology

[0002] In the aerospace field, casing-type and bladed disk-type parts are complex rotating parts with surfaces including planes, curved surfaces, inclined planes, and numerous holes, requiring extremely high dimensional accuracy. In the CNC machining of these parts, the rotary table is a core component for achieving precision machining of complex surfaces and efficient multi-station operation.

[0003] However, during prolonged high-load operation, the drive and transmission components of the rotary table generate a significant amount of heat due to friction and energy loss, causing the component temperatures to rise. Due to the thermal expansion characteristics of metallic materials, this temperature increase leads to thermal deformation of metal parts, disrupting the original precision fit clearances and reducing the geometric accuracy of the rotary shaft system. This, in turn, affects the positioning accuracy and repeatability of the rotary table. Utility Model Content

[0004] In view of this, this application provides a rotary table and a CNC vertical lathe, the main purpose of which is to cool down the drive assembly and transmission assembly.

[0005] To achieve the above objectives, this application mainly provides the following technical solutions: One aspect of this application provides a rotary worktable, including a turntable, a transmission base, and a multi-stage lubrication system; the turntable is rotatably connected to the top of the transmission base; the transmission base is provided with a drive assembly, a transmission assembly, and a rotary shaft assembly, the drive assembly being drively connected to the transmission assembly, and the rotary shaft assembly being connected to both the turntable and the transmission assembly to drive the turntable to rotate; the multi-stage lubrication system is connected to both the drive assembly and the transmission assembly, and is used to drive lubricating oil, whose temperature is regulated by a cooling control system, to circulate within the drive assembly and the transmission assembly respectively, so as to cool the drive assembly and the transmission assembly.

[0006] Optionally, the transmission base is an integral structure.

[0007] Optionally, a labyrinth seal is provided at the relative rotational engagement point between the turntable and the transmission base, and the labyrinth seal is arranged circumferentially along the rotational gap between the turntable and the transmission base; a water-blocking ring is provided on the outer periphery of the turntable, the water-blocking ring extends along the turntable toward the transmission base, and the extension range of the water-blocking ring covers the outer periphery of the labyrinth seal, so as to prevent external liquid from seeping into the engagement gap between the turntable and the transmission base and the labyrinth seal.

[0008] Optionally, the rotary shaft assembly includes a main shaft, a crossed roller bearing, and a gear ring; the main shaft is fixedly disposed within the transmission base; the crossed roller bearing is sleeved on the outer circumference of the main shaft; the gear ring is sleeved on the outer circumference of the crossed roller bearing, and the gear ring is relatively fixed to the turntable for driving the turntable to rotate synchronously; the output end of the transmission assembly is connected to the gear ring for driving the gear ring to rotate around the axis of the main shaft.

[0009] Optionally, the transmission assembly includes at least a first transmission stage, a second transmission stage, and a third transmission stage that are sequentially connected along the power transmission direction. Each of the first, second, and third transmission stages is rotatably supported within the transmission base via an independent bearing system. The output end of the drive assembly is connected to the input end of the first transmission stage, the output end of the first transmission stage is connected to the input end of the second transmission stage, the output end of the second transmission stage is connected to the input end of the third transmission stage, and the output end of the third transmission stage is connected to the gear ring of the rotary shaft assembly. This allows the power of the drive assembly to be sequentially transmitted through the first, second, and third transmission stages to the gear ring, thereby driving the gear ring to rotate around the axis of the main shaft.

[0010] Optionally, the transmission assembly further includes a transmission cover plate, which covers the opening of the transmission base and, together with the transmission base, forms a chamber for accommodating the first transmission stage, the second transmission stage, and the third transmission stage; the multi-stage lubrication system includes an oil inlet and an oil outlet on the outer wall of the transmission base, and a first oil inlet branch, a second oil inlet branch, a third oil inlet branch, a first oil outlet branch, a second oil outlet branch, and a third oil outlet branch disposed within the transmission base; the transmission cover plate is provided with a first flange corresponding to the position of the first transmission stage, and the first flange is provided with a first oil hole, which communicates with the oil inlet through the first oil inlet branch to receive lubricating oil input through the oil inlet; the transmission base is provided with a first oil trough corresponding to the position of the first transmission stage, the first oil trough being located below the first transmission stage, for receiving lubricating oil dripping after being transported to the first transmission stage through the first oil hole, and the first oil trough is communicated with the oil outlet through the first oil outlet branch to transport the recovered lubricating oil to the oil outlet; the transmission cover plate is provided with a first oil trough corresponding to the position of the first transmission stage, the first oil trough being located below the first transmission stage to receive ... The second transmission stage is provided with a second flange, on which a second oil hole is opened. The second oil hole is connected to the oil inlet through the second oil inlet branch to receive lubricating oil input through the oil inlet. The transmission base is provided with a second oil groove corresponding to the position of the second transmission stage. The second oil groove is located below the second transmission stage and is used to receive lubricating oil dripping after being delivered to the second transmission stage through the second oil hole. The second oil groove is connected to the oil outlet through the second oil outlet branch to transport the recovered lubricating oil to the oil outlet. One end of the third oil inlet branch is connected to the oil inlet, and the other end extends to the transmission connection between the rotary shaft assembly and the third transmission stage to deliver lubricating oil to the transmission connection between the rotary shaft assembly and the third transmission stage. The transmission base is provided with a third oil groove corresponding to the position of the third transmission stage. The third oil groove is located below the third transmission stage and is used to receive lubricating oil dripping from the third transmission stage. The third oil groove is connected to the oil outlet through the third oil outlet branch to transport the recovered lubricating oil to the oil outlet.

[0011] Optionally, the drive assembly includes a drive shaft, which is connected to the input end of the first transmission stage. The drive shaft is also rotatably supported by an independent bearing system within a cavity formed by the transmission cover plate and the transmission base. The multi-stage lubrication system further includes a fourth oil inlet branch and a fourth oil outlet branch disposed within the transmission base. The transmission cover plate is provided with a fourth flange corresponding to the position of the drive shaft. The fourth flange has a fourth oil hole, which is connected to the oil inlet through the fourth oil inlet branch to receive lubricating oil input through the oil inlet. The transmission base is provided with a fourth oil groove corresponding to the position of the drive shaft. The fourth oil groove is located below the drive shaft and is used to receive lubricating oil dripping from the drive shaft after being delivered through the fourth oil hole. The fourth oil groove is connected to the oil outlet through the fourth oil outlet branch to deliver the recovered lubricating oil to the oil outlet.

[0012] Optionally, the bottoms of the first oil tank, the second oil tank, the third oil tank, and the fourth oil tank are all inclined, and the inclination direction is consistent, gradually decreasing from the side away from the oil outlet to the side closer to the oil outlet.

[0013] Optionally, the rotary table further includes a rotation parameter detection component; the rotation parameter detection component includes a fixed part and a rotating part that cooperate with each other; the rotating part is fixed relative to the turntable and rotates synchronously with the turntable around the axis of the main shaft; the fixed part is fixedly disposed on the main shaft, and the fixed part and the rotating part are disposed opposite to each other along the axial direction of the main shaft, and the fixed part is used to read the angle signal when the rotating part rotates.

[0014] Another aspect of this application provides a CNC vertical lathe, including the rotary table described in any of the above claims.

[0015] By employing the above technical solution, this application has at least the following beneficial effects: The rotary platform provided in this application, through the setting of a multi-stage lubrication system, circulates lubricating oil, whose temperature is regulated by the cooling control system, within the drive and transmission components. This lubrication oil circulation not only lubricates and reduces friction in the drive and transmission components, but also allows the cooled lubricating oil to directly remove the heat generated by friction and energy loss, preventing thermal deformation of components due to temperature rise. This maintains the original precision fit clearance of the rotary shaft system, ensuring the positioning accuracy and repeatability of the worktable, and ultimately improving the operational stability and accuracy retention of the rotary worktable under long-term high-load conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a rotary table according to an optional embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the structure at point AA.

[0017] The reference numerals in the attached figures are as follows: 1. Turntable; 2. Transmission base; 21. First oil groove; 22. Second oil groove; 23. Third oil groove; 24. Fourth oil groove; 3. Multi-stage lubrication system; 31. Oil inlet; 32. Oil outlet; 4. Drive assembly; 41. Drive shaft; 42. Fourth flange; 5. Transmission assembly; 51. First transmission stage; 511. First flange; 52. Second transmission stage; 521. Second flange; 53. Third transmission stage; 531. Third flange; 54. Transmission cover plate; 6. Rotary shaft assembly; 61. Main shaft; 62. Crossed roller bearing; 63. Gear ring; 7. Labyrinth seal; 8. Water retaining ring; 9. Rotation parameter detection assembly; 91. Fixed part; 92. Rotating part. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0020] 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 connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection 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.

[0021] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] See Figure 1 and Figure 2 As shown, according to an embodiment of this application, a rotary worktable is provided, including a turntable 1, a transmission base 2, and a multi-stage lubrication system 3; the turntable 1 is rotatably connected to the top of the transmission base 2; the transmission base 2 is provided with a drive assembly 4, a transmission assembly 5, and a rotary shaft assembly 6, the drive assembly 4 and the transmission assembly 5 are connected in a transmission manner, and the rotary shaft assembly 6 is connected to the turntable 1 and the transmission assembly 5 respectively to drive the turntable 1 to rotate; the multi-stage lubrication system 3 is connected to the drive assembly 4 and the transmission assembly 5 respectively, and is used to drive the lubricating oil, whose temperature is regulated by the cooling control system, to form a circulation in the drive assembly 4 and the transmission assembly 5 respectively, so as to cool the drive assembly 4 and the transmission assembly 5.

[0023] The rotary platform provided in the embodiments of this application, by setting up a multi-stage lubrication system 3, circulates the lubricating oil, whose temperature is regulated by the cooling control system, in the drive component 4 and the transmission component 5 respectively. The lubricating oil circulation not only lubricates and reduces friction in the drive component 4 and the transmission component 5, but also directly removes the heat generated by friction and energy loss by using the cooled lubricating oil, thus preventing the components from thermally deforming due to temperature rise. This maintains the original precision fit clearance of the rotary shaft system, ensures the positioning accuracy and repeatability of the worktable, and ultimately improves the operational stability and accuracy retention of the rotary worktable under long-term high-load conditions.

[0024] Among them, turntable 1 is the actuator that realizes the rotation function and is used to support the workpiece or equipment to be processed.

[0025] Specifically, in terms of material selection, turntable 1 can be made of high-strength cast iron or alloy steel to balance the required rigidity and shock absorption. In terms of structural design, its surface can be machined with T-slots or positioning holes for fixing workpieces. For large turntables 1, weight reduction holes can also be designed to reduce rotational inertia by reducing its own weight.

[0026] Among them, the transmission base 2 serves as the load-bearing foundation, and integrates components such as the drive assembly 4, transmission assembly 5, and rotary shaft assembly 6. It provides a closed space to protect the internal structure, while bearing the weight of the turntable 1 and the workpiece to be processed.

[0027] Specifically, the transmission base 2 adopts an integral casting structure, which can not only ensure its own rigidity, but also enhance the stability of the turntable 1 and the transmission assembly 5, thereby improving the overall operating stability of the machine; the interior is divided into chambers to accommodate the drive assembly 4, the transmission assembly 5 and the rotary shaft assembly 6 respectively, reducing mutual interference between components.

[0028] The drive assembly 4 is used to provide rotational power and output torque to the transmission assembly 5.

[0029] Specifically, the specific form of the drive component 4 can be selected according to the actual working conditions. Common types include servo motors, geared motors, and hydraulic motors. This application does not limit its specific form. In this embodiment, the drive component 4 adopts a geared motor, which includes a drive motor and a reducer.

[0030] The transmission component 5 is used to transmit the power of the drive component 4 to the rotary shaft component 6 to achieve speed / torque matching.

[0031] Specifically, the specific form of the transmission component 5 can be selected according to the actual working conditions. Common types include gear transmission, belt transmission, and harmonic transmission. This application does not limit its specific form. In this embodiment, the transmission component 5 is selected as a gear transmission.

[0032] Among them, the rotary shaft assembly 6 is the bearing shaft system for rotary motion, used to connect the transmission assembly 5 and the turntable 1.

[0033] Specifically, the form of the rotary shaft assembly 6 can be selected according to actual needs. Common forms include a combination of a spindle 61 and a bearing, or a hydrostatic shaft system. This application does not limit its specific form. In this embodiment, the rotary shaft assembly 6 is selected as a combination of a spindle 61 and a bearing.

[0034] The multi-stage lubrication system 3 lubricates and cools the drive assembly 4 and transmission assembly 5 through branching, and removes heat by circulating lubricating oil to maintain stable component temperature.

[0035] Specifically, the multi-stage lubrication system 3 includes an oil distribution block, which is connected to the outlet of the oil cooler, which serves as the lubricating oil supply source. The oil distribution block distributes the lubricating oil to different branches through internally preset oil passages, which are respectively directed to the drive component 4 and the transmission component 5. At the same time, it can be used in conjunction with flow regulation structures such as throttle valves to control the amount of lubricating oil in each branch, ensuring that different components receive the appropriate amount of lubricating oil, thereby further improving the targetedness and efficiency of lubrication.

[0036] The cooling control system regulates the lubricating oil temperature to ensure that the lubricating oil entering the drive assembly 4 and transmission assembly 5 is within its optimal operating temperature range. Here, the optimal operating temperature range for the lubricating oil is 30°C to 40°C.

[0037] Specifically, the cooling control system includes an oil cooler, a temperature sensor, and a controller. The temperature sensor monitors the lubricating oil temperature in the circulating oil circuit, such as at the lubricating oil outlet, in real time and transmits the temperature signal to the controller. The controller determines whether to start or adjust the operating status of the oil cooler based on a preset temperature threshold of 30°C to 40°C. When the detected oil temperature is higher than the threshold, the oil cooler starts and cools the lubricating oil; when the oil temperature drops to within the threshold range, the oil cooler automatically adjusts its cooling power or stops operating, thereby precisely controlling the lubricating oil temperature to ensure that it enters the drive assembly 4 and transmission assembly 5 at the optimal temperature, fully utilizing the lubrication and cooling effects.

[0038] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, a labyrinth seal 7 is provided at the relative rotational engagement point between the turntable 1 and the transmission base 2. The labyrinth seal 7 is arranged circumferentially along the rotational gap between the turntable 1 and the transmission base 2. A water-blocking ring 8 is provided on the outer periphery of the turntable 1. The water-blocking ring 8 extends along the turntable 1 toward the transmission base 2, and the extension range of the water-blocking ring 8 covers the outer periphery of the labyrinth seal 7, which is used to prevent external liquid from seeping into the engagement gap between the turntable 1 and the transmission base 2 and the labyrinth seal 7.

[0039] In this embodiment, a circumferential labyrinth seal 7 is provided at the relative rotational engagement point between the turntable 1 and the transmission base 2. Utilizing the tortuous channels of the labyrinth structure itself, external impurities and small amounts of liquid can be effectively blocked from entering the rotational gap between the two, initially forming a sealing barrier to protect precision components such as the internal rotary shaft assembly 6 from contaminant interference. Simultaneously, a water-retaining ring 8 is provided on the outer periphery of the turntable 1, extending towards the transmission base 2 and covering the outer periphery of the labyrinth seal 7. This further constructs an outer layer of protection, actively preventing external liquid from flowing directly to the engagement gap between the turntable 1 and the transmission base 2 and the labyrinth seal 7 through physical shielding. This avoids liquid accumulation or penetration into the labyrinth seal 7 at the gap, preventing liquid from damaging the sealing effect of the labyrinth seal 7, preventing liquid from entering the transmission base 2 and mixing with the lubricating oil, thus affecting the working efficiency of the lubrication and cooling system, and reducing liquid corrosion of the rotating engagement surfaces. Therefore, this comprehensively improves the sealing reliability and protection capability of the rotating engagement parts of the rotary table, ensuring the stable operation of internal components and extending the overall service life of the equipment.

[0040] The turntable 1 is detachably connected to the transmission base 2, with initial assembly achieved through a snap-fit ​​mechanism. The turntable 1 is initially positioned on the transmission base 2 by the engagement of the groove and boss of the labyrinth seal 7, ensuring connection stability and preventing external impurities and liquid infiltration. Similarly, the turntable 1 and the rotary shaft assembly 6 are detachably connected, secured by a bolted connection. For example, matching bolt holes are provided at the corresponding assembly positions of the rotary shaft assembly 6 and the turntable 1. Bolts are inserted and tightened to secure the connection. When disassembly is required, the turntable 1 can be separated from the rotary shaft assembly 6 simply by unscrewing the bolts, thus balancing connection stability with ease of assembly and disassembly.

[0041] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the rotary shaft assembly 6 includes a main shaft 61, a crossed roller bearing 62, and a gear ring 63; the main shaft 61 is fixedly installed inside the transmission base 2; the crossed roller bearing 62 is sleeved on the outer circumference of the main shaft 61; the gear ring 63 is sleeved on the outer circumference of the crossed roller bearing 62, and the gear ring 63 is relatively fixed to the turntable 1, for driving the turntable 1 to rotate synchronously; the output end of the transmission assembly 5 is connected to the gear ring 63 to drive the gear ring 63 to rotate around the axis of the main shaft 61.

[0042] In this embodiment, by fixing the main shaft 61 inside the transmission base 2, a stable rigid support is provided for the entire rotary shaft assembly 6, which can directly bear and transmit the longitudinal load of the turntable 1 and the workpiece to be processed. At the same time, the crossed roller bearing 62 sleeved on the outer periphery of the main shaft 61, with its structure in which the rolling elements and inner and outer raceways are arranged in a cross pattern, can not only bear the radial load, axial load and overturning moment at the same time, but also evenly distribute the load to the contact surface between the main shaft 61 and the bearing, avoiding local stress concentration and greatly enhancing the ability of the rotary shaft assembly 6 to resist load deformation. The gear ring 63, which is fixed relative to the turntable 1, can transmit power and simultaneously transmit the radial and axial loads applied by the turntable 1 to the crossed roller bearing 62, so that the turntable 1 can maintain structural stability and rotational accuracy when bearing a heavy workpiece to be processed or running under high load for a long time, thus improving the load-bearing capacity.

[0043] The spindle 61 has a stepped structure at its shaft end, forming a positioning surface for mounting the crossed roller bearing 62, to ensure that the radial and axial positions of the crossed roller bearing 62 are accurately fixed and to avoid assembly deviations affecting rotational accuracy.

[0044] The crossed roller bearing 62 has an upper bearing cap and a lower bearing cap at its upper and lower ends, respectively. The upper bearing cap is fixed relative to the main shaft 61, pressing the crossed roller bearing 62 from above to restrict its upward movement. The lower bearing cap is fixed to the bottom of the gear ring 63, pressing against the crossed roller bearing 62 from below to constrain its downward displacement. Based on this, the cooperation of the upper and lower bearing caps locks the crossed roller bearing 62 between the main shaft 61 and the gear ring 63, ensuring the stability of the crossed roller bearing 62 during operation and enhancing the overall rigidity of the rotary shaft assembly 6.

[0045] The gear ring 63 is fitted around the outer circumference of the crossed roller bearing 62. On the one hand, it forms a relative rotatable fit with the main shaft 61 through the crossed roller bearing 62. On the other hand, it is fixed relative to the turntable 1 through bolt connection. When the output end of the transmission component 5 meshes with the gear ring 63, the gear ring 63 will rotate around the axis of the main shaft 61, thereby driving the turntable 1 to rotate synchronously, realizing the efficient transmission of power from the transmission component 5 to the turntable 1.

[0046] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the transmission assembly 5 includes at least a first transmission stage 51, a second transmission stage 52, and a third transmission stage 53 that are sequentially connected along the power transmission direction. The first transmission stage 51, the second transmission stage 52, and the third transmission stage 53 are all rotatably supported in the transmission base 2 by independent bearing systems. The output end of the drive assembly 4 is connected to the input end of the first transmission stage 51, the output end of the first transmission stage 51 is connected to the input end of the second transmission stage 52, the output end of the second transmission stage 52 is connected to the input end of the third transmission stage 53, and the output end of the third transmission stage 53 is connected to the gear ring 63 of the rotary shaft assembly 6. The power of the drive assembly 4 is sequentially transmitted to the gear ring 63 via the first transmission stage 51, the second transmission stage 52, and the third transmission stage 53, thereby driving the gear ring 63 to rotate around the axis of the main shaft 61.

[0047] In this embodiment, by setting multiple transmission stages, multi-stage matching of speed and torque can be flexibly achieved. This not only adapts to the output characteristics of the drive component 4, but also provides the gear ring 63 with power parameters that meet the load requirements of the turntable 1, avoiding wear or power loss caused by excessive load on a single transmission stage. At the same time, each transmission stage is supported in the transmission base 2 by an independent bearing system, which can effectively distribute the radial and axial loads of each stage of transmission components, prevent component deformation or vibration caused by load concentration, ensure the smoothness of the transmission process, reduce positioning errors caused by vibration, and improve the running accuracy and reliability of the rotary table.

[0048] The first transmission stage 51 includes a first transmission shaft, on which a first driving gear and a first driven gear are mounted. The first driven gear meshes with the output end of the drive assembly 4 to receive power, while the first driving gear meshes with the input end of the second transmission stage 52 to transmit power. Simultaneously, two first deep groove ball bearing assemblies are respectively fitted at both ends of the first transmission shaft. These first deep groove ball bearing assemblies rotatably support the first transmission shaft within the transmission base 2 and bear radial loads, ensuring the stability of the first transmission shaft during high-speed rotation and reducing the interference of radial runout on transmission accuracy. Furthermore, a first adjusting shim is provided at the bottom of the first transmission shaft. By increasing or decreasing the thickness of the first adjusting shim, the axial position of the first transmission shaft can be finely adjusted to ensure that the meshing clearance of each gear is in the optimal state, avoiding excessively tight or loose gear meshing due to assembly errors. If necessary, a first inner spacer can also be provided in the first deep groove ball bearing assembly to separate multiple first deep groove ball bearings within the first deep groove ball bearing assembly, ensuring uniform spacing between the first deep groove ball bearings, making the load distribution more balanced, and simultaneously enhancing the rigidity of the first deep groove ball bearing assembly.

[0049] The second transmission stage 52 includes a second transmission shaft, on which a second driving gear and a second driven gear are mounted. The second driven gear meshes with the first driving gear of the first transmission stage 51 to receive power, while the second driving gear meshes with the input end of the third transmission stage 53 to transmit power. Simultaneously, two second deep groove ball bearing assemblies are respectively fitted at both ends of the second transmission shaft. These assemblies rotatably support the second transmission shaft within the transmission base 2 and bear radial loads, ensuring stability during high-speed rotation and reducing interference from radial runout on transmission accuracy. Furthermore, a second adjusting shim is provided at the bottom of the second transmission shaft. By increasing or decreasing the thickness of the second adjusting shim, the axial position of the second transmission shaft can be finely adjusted to ensure optimal gear meshing clearances and prevent excessively tight or loose gear meshing due to assembly errors. If necessary, a second inner spacer can be provided within the second deep groove ball bearing assembly to separate multiple second deep groove ball bearings within the assembly, ensuring uniform spacing between the bearings, more balanced load distribution, and enhanced rigidity of the assembly.

[0050] The third transmission stage 53 includes a third transmission shaft, on which a third driving gear and a third driven gear are mounted. The third driven gear meshes with the second driving gear of the second transmission stage 52 to receive power, while the third driving gear meshes with the gear ring 63 of the rotary shaft assembly 6 to transmit power. Simultaneously, two third deep groove ball bearing assemblies are fitted onto the third transmission shaft. These bearing assemblies rotatably support the third transmission shaft within the transmission base 2 and bear radial loads, ensuring stability during high-speed rotation and reducing interference from radial runout on transmission accuracy. Furthermore, a third adjusting shim is provided at the bottom of the third transmission shaft. By increasing or decreasing the thickness of the third adjusting shim, the axial position of the third transmission shaft can be finely adjusted to ensure optimal gear meshing clearances and prevent excessively tight or loose gear meshing due to assembly errors. If necessary, a third inner spacer can be installed within the third deep groove ball bearing assembly to separate multiple bearings, ensuring uniform bearing spacing, more balanced load distribution, and enhanced rigidity of the bearing assembly.

[0051] It should be noted that, to accommodate the mounting position of the gear ring 63, the axial length of the third drive shaft is greater than that of the first and second drive shafts. Two third deep groove ball bearing assemblies are located at the bottom and middle of the third drive shaft, respectively. A locking nut is installed at the third deep groove ball bearing assembly located in the middle of the third drive shaft. Tightening the locking nut axially fixes the third deep groove ball bearing assembly, preventing axial movement during high-speed rotation of the third drive shaft and further ensuring the stability of the bearing support and transmission accuracy. The top of the third drive shaft is the shaft end, with a tapered outer surface for mounting the third drive gear that meshes with the gear ring 63. A locking flange, referred to as the third flange 531 (described later), is located on the outer axial side of the third drive gear. This flange firmly secures the third drive gear to the tapered shaft end of the third drive shaft, preventing axial displacement or loosening of the third drive gear during power transmission. This ensures that the third drive gear and gear ring 63 maintain a stable meshing state, guaranteeing the reliability of power transmission.

[0052] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2As shown, the transmission assembly 5 also includes a transmission cover plate 54, which covers the opening of the transmission base 2 and forms a chamber with the transmission base 2 to accommodate the first transmission stage 51, the second transmission stage 52, and the third transmission stage 53. The multi-stage lubrication system 3 includes an oil inlet 31 and an oil outlet 32 ​​opened on the outer wall of the transmission base 2, as well as a first oil inlet branch, a second oil inlet branch, a third oil inlet branch, a first oil outlet branch, a second oil outlet branch, and a third oil outlet branch disposed within the transmission base 2. The transmission cover plate 54 is positioned corresponding to the first transmission stage 51. A first flange 511 is provided, on which a first oil hole is opened. The first oil hole is connected to an oil inlet 31 through a first oil inlet branch to receive lubricating oil input through the oil inlet 31. A first oil groove 21 is provided on the transmission base 2 corresponding to the position of the first transmission stage 51. The first oil groove 21 is located below the first transmission stage 51 and is used to receive lubricating oil dripping after being delivered to the first transmission stage 51 through the first oil hole. The first oil groove 21 is connected to an oil outlet 32 ​​through a first oil outlet branch to deliver the recovered lubricating oil to the oil outlet 32. Transmission cover plate 54 A second flange 521 is provided corresponding to the position of the second transmission stage 52. A second oil hole is provided on the second flange 521, which is connected to the oil inlet 31 via a second oil inlet branch to receive lubricating oil input through the oil inlet 31. A second oil trough 22 is provided on the transmission base 2 corresponding to the position of the second transmission stage 52. The second oil trough 22 is located below the second transmission stage 52 and is used to collect lubricating oil dripping from the second transmission stage 52 after being delivered through the second oil hole. The second oil trough 22 is connected to the oil outlet 32 ​​via a second oil outlet branch to transport the recovered lubricating oil. The oil outlet is 32; one end of the third oil inlet branch is connected to the oil inlet 31, and the other end extends to the transmission connection between the rotary shaft assembly 6 and the third transmission stage 53 to deliver lubricating oil to the transmission connection between the rotary shaft assembly 6 and the third transmission stage 53; the transmission base 2 is provided with a third oil groove 23 corresponding to the position of the third transmission stage 53. The third oil groove 23 is located below the third transmission stage 53 and is used to receive the lubricating oil dripping from the third transmission stage 53. The third oil groove 23 is connected to the oil outlet 32 ​​through the third oil outlet branch to deliver the recovered lubricating oil to the oil outlet 32.

[0053] In this embodiment, an oil inlet 31 and an oil outlet 32 ​​are provided on the outer wall of the transmission base 2, and a first oil inlet branch, a second oil inlet branch, a third oil inlet branch, a first oil outlet branch, a second oil outlet branch, and a third oil outlet branch are provided inside the transmission base 2. Simultaneously, a first flange 511 with a first oil hole is provided on the transmission cover plate 54 at a position corresponding to the first transmission stage 51, so that the first oil hole communicates with the oil inlet 31 via the first oil inlet branch. Furthermore, a first oil groove 21 is provided inside the transmission base 2 at a position corresponding to the first transmission stage 51, located below it and communicating with the first oil outlet branch. Additionally, on the transmission cover plate 54… A second flange 521 with a second oil hole is provided at the position corresponding to the second transmission stage 52, so that the second oil hole is connected to the oil inlet 31 via the second oil inlet branch. A second oil groove 22, located below the second transmission stage 52 and connected to the second oil outlet branch, is provided inside the transmission base 2 at the position corresponding to the second transmission stage 52. One end of the third oil inlet branch is connected to the oil inlet 31, and the other end extends to the transmission connection between the gear ring 63 of the rotary shaft assembly 6 and the third drive gear of the third transmission stage 53. Simultaneously, a third oil groove 23, located below the third transmission stage 53 and connected to the third oil outlet branch, is provided inside the transmission base 2 at the position corresponding to the third transmission stage 53. This constitutes a complete multi-stage lubrication circulation path, allowing the cooling lubricating oil input through the oil inlet 31 to be delivered to the meshing area of ​​the first transmission stage 51 through the first oil inlet branch and the first oil hole for lubrication and cooling, before dripping into the first oil trough 21, and then flowing to the oil outlet 32 ​​through the first oil outlet branch; simultaneously, the lubricating oil is delivered to the meshing area of ​​the second transmission stage 52 through the second oil inlet branch and the second oil hole for lubrication and cooling, before dripping into the second oil trough 22, and then flowing to the oil outlet 32 ​​through the second oil outlet branch; in addition, the lubricating oil is also directly delivered to the gear ring 63 of the rotary shaft assembly 6 and the third transmission stage 53 through the third oil inlet branch. The meshing area of ​​the third drive gear is lubricated and cooled, while the lubricating oil droplets generated by the third transmission stage 53 fall into the third oil trough 23 and flow to the oil outlet 32 ​​through the third oil outlet branch. Finally, all the used lubricating oil is returned to the oil cooler from the oil outlet 32 ​​for cooling treatment. This achieves effective and directional lubrication and heat dissipation at the transmission connection between the first transmission stage 51, the second transmission stage 52, and the rotary shaft assembly 6 and the third transmission stage 53, ensuring the temperature stability and lubrication reliability of each transmission component under long-term high-load operation, reducing wear and thermal deformation, and improving transmission accuracy and continuous stability of system operation.

[0054] When a first deep groove ball bearing assembly is provided at the end of the first transmission shaft in the first transmission stage 51, the inner ring of the first deep groove ball bearing assembly located at the upper end of the first transmission shaft is installed on the journal of the first transmission shaft by interference fit and rotates together with the first transmission shaft. The outer ring of the first deep groove ball bearing assembly is installed in the inner hole of the first flange 511 by interference fit. The first flange 511 is fixedly connected to the transmission cover plate 54. Through the fixing effect of the first flange 511 on the outer ring of the first deep groove ball bearing assembly, radial support and axial positioning of the upper end of the first transmission shaft are achieved. Similarly, when a second deep groove ball bearing assembly is provided at the end of the second transmission shaft in the second transmission stage 52, the inner ring of the second deep groove ball bearing assembly located at the upper end of the second transmission shaft is installed on the journal of the second transmission shaft by interference fit and rotates with the second transmission shaft. The outer ring of the second deep groove ball bearing assembly is installed in the inner hole of the second flange 521 by interference fit. The second flange 521 is fixedly connected to the transmission cover plate 54. Through the fixing effect of the second flange 521 on the outer ring of the second deep groove ball bearing assembly, radial support and axial positioning of the upper end of the second transmission shaft are achieved. As for the third transmission stage 53, since the axial length of the third transmission shaft is greater than the axial length of the first transmission shaft and the second transmission shaft, the third flange 531 provided at the upper end of the third transmission shaft is not fixedly connected to the transmission cover plate 54, but is fixedly connected to the third transmission shaft to lock the third drive gear.

[0055] To ensure the directional distribution of lubricating oil supplied from the third oil inlet branch to the transmission connection between the rotary shaft assembly 6 and the third transmission stage 53 and to prevent excessive splashing, an oil baffle is provided on the axial outer side of the third drive gear, and this oil baffle is fixed above the third drive gear. It should be noted that when a locking flange, i.e., a third flange 531, is also provided on the axial outer side of the third drive gear, the third flange 531 is located inside the oil baffle and is fixedly connected to the third transmission shaft by bolts.

[0056] When a locking nut is provided at the third deep groove ball bearing assembly located in the middle of the third drive shaft, an oil passage hole is provided on the locking nut. The oil passage hole passes through the locking nut, allowing lubricating oil to pass through the locking nut to lubricate and cool the components below the locking nut. This ensures that the lubricating oil can be smoothly delivered to the bearing area of ​​the third deep groove ball bearing assembly and the meshing area between the third driven gear and the second driving gear.

[0057] When the bottom of the first drive shaft, the second drive shaft, and the third drive shaft are respectively provided with a first adjusting shim, a second adjusting shim, and a third adjusting shim, oil passage holes are also opened on the first adjusting shim, the second adjusting shim, and the third adjusting shim. The oil passage holes are arranged through the thickness direction of the adjusting shim, so that the return oil generated after the first drive stage 51, the second drive stage 52, and the third drive stage 53 have completed lubrication and cooling can pass through the oil passage holes on the first adjusting shim and flow into the first oil groove 21 below the first drive stage 51, through the oil passage holes on the second adjusting shim and flow into the second oil groove 22 below the second drive stage 52, and through the oil passage holes on the third adjusting shim and flow into the third oil groove 23 below the third drive stage 53. The recovered lubricating oil is then transported to the oil outlet 32 ​​through the first oil outlet branch, the second oil outlet branch, and the third oil outlet branch, and finally returned to the oil cooler for cooling treatment, thus forming a complete lubricating oil circulation loop.

[0058] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the drive assembly 4 includes a drive shaft 41, which is connected to the input end of the first transmission stage 51. The drive shaft 41 is also rotatably supported by an independent bearing system within the cavity formed by the transmission cover plate 54 and the transmission base 2. The multi-stage lubrication system 3 also includes a fourth oil inlet branch and a fourth oil outlet branch disposed within the transmission base 2. The transmission cover plate 54 is provided with a fourth flange 42 corresponding to the position of the drive shaft 41. A fourth oil hole is provided on the fourth flange 42. The fourth oil hole is connected to the oil inlet 31 through the fourth oil inlet branch to receive the lubricating oil input through the oil inlet 31. The transmission base 2 is provided with a fourth oil groove 24 corresponding to the position of the drive shaft 41. The fourth oil groove 24 is located below the drive shaft 41 and is used to receive the lubricating oil dripping after being delivered to the drive shaft 41 through the fourth oil hole. The fourth oil groove 24 is connected to the oil outlet 32 ​​through the fourth oil outlet branch to deliver the recovered lubricating oil to the oil outlet 32.

[0059] In this embodiment, by providing a fourth oil inlet branch and a fourth oil outlet branch within the transmission base 2, and by providing a fourth flange 42 with a fourth oil hole on the transmission cover plate 54 corresponding to the position of the drive shaft 41, the fourth oil hole is connected to the oil inlet 31 via the fourth oil inlet branch. Simultaneously, a fourth oil groove 24 is provided below the drive shaft 41 within the transmission base 2, corresponding to the position of the drive shaft 41, and connected to the fourth oil outlet branch. This integrates the drive shaft 41 of the drive assembly 4 into the overall lubrication system. This allows the cooling and lubricating oil input through the oil inlet 31 to be precisely delivered to the bearing support area of ​​the drive shaft 41 via the fourth oil inlet branch and the fourth oil hole. The lubricating oil is lubricated and cooled at the meshing part of the drive shaft 4 and the input end of the first transmission stage 51. Then, the lubricating oil drips into the fourth oil tank 24 under the action of gravity and is transported to the oil outlet 32 ​​through the fourth oil outlet branch. Finally, it returns to the oil cooler along with the return oil from other branches for cooling. This achieves fixed-point oil supply and efficient heat dissipation for the key moving parts of the drive assembly 4, effectively reducing the friction loss and temperature rise of the drive shaft 41 during operation, preventing bearing failure or gear wear caused by local overheating, improving the smoothness, reliability and service life of the drive assembly 4, and enhancing the continuous working ability of the whole machine under long-term high-load conditions.

[0060] The drive assembly 4 also includes a reducer and a reducer bracket. The reducer bracket is fixedly mounted on the transmission cover plate 54, and the reducer is fixedly mounted on the reducer bracket. The reducer is used to connect to the drive motor, and transmits the power output by the drive motor to the drive shaft 41 after reduction and torque amplification, and then inputs it to the first transmission stage 51. Here, the output shaft of the reducer is connected to the drive shaft 41 by a coupling or by direct connection.

[0061] Specifically, a drive gear is mounted on the drive shaft 41, which meshes with the first driven gear of the first transmission stage 51 to transmit power. Simultaneously, two fourth deep groove ball bearing assemblies are respectively fitted at both ends of the drive shaft 41. These fourth deep groove ball bearing assemblies rotatably support the drive shaft 41 within the transmission base 2 and bear radial loads, ensuring the stability of the drive shaft 41 during high-speed rotation and reducing the interference of radial runout on transmission accuracy. Furthermore, a fourth adjusting shim is provided at the bottom of the drive shaft 41. By increasing or decreasing the thickness of the fourth adjusting shim, the axial position of the drive shaft 41 can be finely adjusted to ensure that the meshing clearance between the drive gear and the first driven gear is in the optimal state, avoiding excessively tight or loose meshing due to assembly errors. If necessary, a fourth inner spacer can also be provided in the fourth deep groove ball bearing assembly to separate multiple fourth deep groove ball bearings within the assembly, ensuring uniform spacing between the bearings, resulting in a more balanced load distribution and enhancing the rigidity of the fourth deep groove ball bearing assembly. Here, two fourth deep groove ball bearing assemblies are located at the upper and lower ends of the drive shaft 41, respectively. The inner ring of the upper fourth deep groove ball bearing assembly is installed on the journal of the drive shaft 41 by interference fit, and the outer ring is installed in the inner hole of the fourth flange 42 by interference fit. The fourth flange 42 is fixedly connected to the transmission cover plate 54, and the inner hole of the fourth flange 42 and the drive shaft 41 maintain a clearance fit in the non-bearing support area. Alternatively, sealing structures such as oil seals and labyrinth seals 7 can be set at this clearance to form a dynamic seal, thereby achieving radial support and axial positioning of the upper end of the drive shaft 41, while preventing external contaminants from entering the transmission cavity and lubricating oil from leaking between the drive shaft 41 and the fourth flange 42, ensuring the sealing and reliability of the drive assembly 4.

[0062] It is understandable that an oil passage hole is also provided on the fourth adjusting shim. The oil passage hole is set through the thickness direction of the fourth adjusting shim, so that the return oil generated after the drive component 4 completes lubrication and cooling can pass through the oil passage hole on the fourth adjusting shim and flow into the fourth oil tank 24 located below the drive component 4. The recovered lubricating oil is then transported to the oil outlet 32 ​​through the fourth oil outlet branch, and finally returned to the oil cooler for cooling treatment, thus forming a complete lubricating oil circulation loop.

[0063] In the above embodiments, see Figure 2 As shown, the bottoms of the first oil tank 21, the second oil tank 22, the third oil tank 23 and the fourth oil tank 24 are all inclined, and the inclination direction is consistent, gradually decreasing from the side away from the oil outlet 32 ​​to the side closer to the oil outlet 32.

[0064] Here, by setting the bottoms of the first oil tank 21, the second oil tank 22, the third oil tank 23, and the fourth oil tank 24 to be inclined, with the inclination direction uniformly decreasing from the side away from the oil outlet 32 ​​to the side closer to the oil outlet 32, the lubricating oil dripping from the first transmission stage 51, the second transmission stage 52, the third transmission stage 53, and the drive assembly 4 into the corresponding oil tanks can automatically and quickly converge towards the oil outlet 32 ​​along the inclined bottom of the tanks under the action of gravity. This effectively avoids local accumulation or stagnation of lubricating oil in the oil tanks and significantly improves the oil return efficiency. Meanwhile, it ensures the uniformity and continuity of the multi-channel lubricating oil confluence path, so that the lubricating oil recovered from each branch can flow smoothly through the first, second, third, and fourth oil outlet branches to the oil outlet 32, and finally return to the oil cooler for cooling circulation. This ensures the smooth operation of the entire multi-stage lubrication system 3 oil circuit, reduces the risk of increased oil level in the cavity, increased oil mist, or poor lubrication caused by poor oil return, and further improves the stability and reliability of the lubrication and cooling system, which is conducive to the continuous and stable operation of the rotary table under long-term high-load conditions.

[0065] In some possible implementations disclosed in this application, see [link to relevant documentation]. Figure 2 As shown, the rotary table also includes a rotary parameter detection component 9; the rotary parameter detection component 9 includes a fixed part 91 and a rotating part 92 that cooperate with each other; the rotating part 92 is fixed relative to the turntable 1 and rotates synchronously with the turntable 1 around the axis of the main shaft 61; the fixed part 91 is fixedly set on the main shaft 61, and the fixed part 91 and the rotating part 92 are set relative to each other along the axial direction of the main shaft 61, and the fixed part 91 is used to read the angle signal when the rotating part 92 rotates.

[0066] In this embodiment, a rotation parameter detection component 9, comprising a fixed part 91 and a rotating part 92, is provided on the rotary table. The rotating part 92 is fixed relative to the turntable 1 and rotates synchronously around the axis of the spindle 61. The fixed part 91 is fixedly installed on the spindle 61 and is axially opposite to the rotating part 92. This allows the rotating part 92 to generate an angular displacement relative to the fixed part 91 as the turntable 1 rotates, enabling the fixed part 91 to read the angle signal output by the rotating part 92 in real time. Since the spindle 61 is fixed while the turntable 1 rotates with the gear ring 63, this layout ensures the stability of the detection reference and avoids signal transmission difficulties or reference drift caused by installation on rotating components. This achieves high-precision, real-time online detection of the rotation angle, speed, and position of the turntable 1, significantly improving the positioning accuracy and repeatability of the rotary table, providing reliable feedback signals for the CNC system, and ensuring the accuracy and automation control level of the machining process.

[0067] The fixed part 91 and the rotating part 92 together constitute a circular grating. The rotation parameter detection component 9 also includes a thin plate, a circular grating adjustment pad, a connecting plate, and a circular grating support.

[0068] Specifically, the rotating part 92 of the circular grating is mounted on the bottom of the turntable 1 via a thin plate and a circular grating adjustment pad, and remains relatively fixed to the turntable 1. It rotates synchronously with the turntable 1 around the axis of the main shaft 61. The circular grating adjustment pad is used to fine-tune the axial position and flatness of the rotating part 92 to ensure a uniform axial gap between it and the fixed part 91. The fixed part 91 of the circular grating is connected to the circular grating bracket via a connecting plate. The circular grating bracket is fixedly mounted on the main shaft 61, and the main shaft 61 is fixedly set inside the transmission base 2, so that the fixed part 91 remains stationary during operation and does not rotate with the turntable 1. The connecting plate is used to achieve a reliable connection between the fixed part 91 and the circular grating bracket and ensure coaxiality. The overall structure makes the fixed part 91 and the rotating part 92 of the circular grating axially opposite each other along the main shaft 61, forming a stable non-contact angle measurement system. It can detect the rotation angle, angular velocity and position changes of the turntable 1 with high precision, providing accurate closed-loop feedback signals for the rotary table and improving positioning accuracy and operational stability.

[0069] Furthermore, embodiments of this application also provide a CNC vertical lathe, including a rotary table as described above. The CNC vertical lathe further includes a bed, a vertically arranged column, a slide, a tool post, and a CNC system. The rotary table is fixedly mounted on the bed, used to carry the workpiece to be processed and to achieve high-precision indexing or continuous rotary motion. The column is vertically arranged on one side of the bed, the slide moves vertically up and down along the guide rail of the column, and the tool post is mounted on the slide and can be fed laterally in the horizontal direction to achieve radial and axial cutting of the workpiece. The CNC system is electrically connected to the drive assembly 4 of the rotary table, the rotation parameter detection assembly 9, and the feed drive devices of the slide and the tool post, coordinating the movement of each axis according to a preset machining program to achieve multi-axis linkage control. Because this CNC vertical lathe uses a rotary table with a multi-stage lubrication and cooling system, a high-rigidity rotary shaft system, and high-precision angle feedback, it not only effectively suppresses thermal deformation and vibration during long-term high-load machining, but also significantly improves the rotational positioning accuracy and repeatability of the workpiece under heavy-load cutting conditions. This ensures high-efficiency and high-precision machining quality for large and complex disc and shell parts, and broadens the machining range and application adaptability of the machine tool.

[0070] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0071] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A rotary worktable, characterized in that, The device includes a turntable, a transmission base, and a multi-stage lubrication system. The turntable is rotatably connected to the top of the transmission base. The transmission base contains a drive assembly, a transmission assembly, and a rotary shaft assembly. The drive assembly is drively connected to the transmission assembly, and the rotary shaft assembly is connected to both the turntable and the transmission assembly to drive the turntable to rotate. The multi-stage lubrication system is connected to both the drive assembly and the transmission assembly, and is used to drive lubricating oil, whose temperature is regulated by the cooling control system, to circulate within the drive assembly and the transmission assembly to cool them.

2. The rotary table according to claim 1, characterized in that, The transmission base is a one-piece structure.

3. The rotary table according to claim 1, characterized in that, A labyrinth seal is provided at the relative rotational engagement point between the turntable and the transmission base. The labyrinth seal is arranged circumferentially along the rotational gap between the turntable and the transmission base. A water-blocking ring is provided on the outer periphery of the turntable. The water-blocking ring extends along the turntable toward the transmission base, and the extension range of the water-blocking ring covers the outer periphery of the labyrinth seal, so as to prevent external liquid from seeping into the engagement gap between the turntable and the transmission base and the labyrinth seal.

4. The rotary table according to claim 1, characterized in that, The rotary shaft assembly includes a main shaft, a crossed roller bearing, and a gear ring; the main shaft is fixedly installed inside the transmission base; the crossed roller bearing is sleeved on the outer circumference of the main shaft; the gear ring is sleeved on the outer circumference of the crossed roller bearing, and the gear ring is relatively fixed to the turntable, for driving the turntable to rotate synchronously; the output end of the transmission assembly is connected to the gear ring to drive the gear ring to rotate around the axis of the main shaft.

5. The rotary table according to claim 4, characterized in that, The transmission assembly includes at least a first transmission stage, a second transmission stage, and a third transmission stage that are sequentially connected along the power transmission direction. Each of the first, second, and third transmission stages is rotatably supported within the transmission base via an independent bearing system. The output end of the drive assembly is connected to the input end of the first transmission stage, the output end of the first transmission stage is connected to the input end of the second transmission stage, the output end of the second transmission stage is connected to the input end of the third transmission stage, and the output end of the third transmission stage is connected to the gear ring of the rotary shaft assembly. This allows the power of the drive assembly to be sequentially transmitted through the first, second, and third transmission stages to the gear ring, thereby driving the gear ring to rotate around the axis of the main shaft.

6. The rotary table according to claim 5, characterized in that, The transmission assembly further includes a transmission cover plate, which covers the opening of the transmission base and together with the transmission base forms a chamber for accommodating the first transmission stage, the second transmission stage, and the third transmission stage; the multi-stage lubrication system includes an oil inlet and an oil outlet on the outer wall of the transmission base, and a first oil inlet branch, a second oil inlet branch, a third oil inlet branch, a first oil outlet branch, a second oil outlet branch, and a third oil outlet branch disposed within the transmission base; the transmission cover plate is provided with a first flange corresponding to the position of the first transmission stage, and the first flange is provided with a first oil hole, which is connected to the oil inlet through the first oil inlet branch to receive lubricating oil input through the oil inlet; the transmission base is provided with a first oil trough corresponding to the position of the first transmission stage, the first oil trough being located below the first transmission stage, for receiving lubricating oil dripping after being transported to the first transmission stage through the first oil hole, and the first oil trough is connected to the oil outlet through the first oil outlet branch to transport the recovered lubricating oil to the oil outlet; the transmission cover plate is provided with a first oil trough corresponding to the position of the first transmission stage, which is located below the first transmission stage to receive lubricating oil dripping after being transported to the first transmission stage through the first oil hole, and the first oil trough is connected to the oil outlet through the first oil outlet branch to transport the recovered lubricating oil to the oil outlet; the transmission cover plate is provided with a first oil outlet branch corresponding to the first transmission stage, which covers the opening of the transmission base and forms a chamber for accommodating the first transmission stage, the second transmission stage, and the third transmission stage; the transmission cover plate is provided with a first flange corresponding to the first transmission stage, and the first flange is provided with a first oil outlet branch, which is connected to the first transmission stage, the second transmission stage, and the third transmission stage. A second flange is provided at the position of the second transmission stage, and a second oil hole is opened on the second flange. The second oil hole is connected to the oil inlet through the second oil inlet branch to receive lubricating oil input through the oil inlet. A second oil groove is provided at the position of the transmission base corresponding to the second transmission stage. The second oil groove is located below the second transmission stage and is used to receive lubricating oil dripping after being delivered to the second transmission stage through the second oil hole. The second oil groove is connected to the oil outlet through the second oil outlet branch to transport the recovered lubricating oil to the oil outlet. One end of the third oil inlet branch is connected to the oil inlet, and the other end extends to the transmission connection between the rotary shaft assembly and the third transmission stage to deliver lubricating oil to the transmission connection between the rotary shaft assembly and the third transmission stage. A third oil groove is provided at the position of the transmission base corresponding to the third transmission stage. The third oil groove is located below the third transmission stage and is used to receive lubricating oil dripping from the third transmission stage. The third oil groove is connected to the oil outlet through the third oil outlet branch to transport the recovered lubricating oil to the oil outlet.

7. The rotary table according to claim 6, characterized in that, The drive assembly includes a drive shaft, which is connected to the input end of the first transmission stage. The drive shaft is also rotatably supported by an independent bearing system within a cavity formed by the transmission cover plate and the transmission base. The multi-stage lubrication system further includes a fourth oil inlet branch and a fourth oil outlet branch disposed within the transmission base. The transmission cover plate is provided with a fourth flange corresponding to the position of the drive shaft. The fourth flange has a fourth oil hole, which is connected to the oil inlet through the fourth oil inlet branch to receive lubricating oil input through the oil inlet. The transmission base is provided with a fourth oil groove corresponding to the position of the drive shaft. The fourth oil groove is located below the drive shaft and is used to receive lubricating oil dripping from the drive shaft after being delivered through the fourth oil hole. The fourth oil groove is connected to the oil outlet through the fourth oil outlet branch to deliver the recovered lubricating oil to the oil outlet.

8. The rotary table according to claim 7, characterized in that, The bottoms of the first oil tank, the second oil tank, the third oil tank, and the fourth oil tank are all inclined, and the inclination direction is consistent, gradually decreasing from the side away from the oil outlet to the side closer to the oil outlet.

9. The rotary table according to claim 4, characterized in that, It also includes a rotation parameter detection component; the rotation parameter detection component includes a fixed part and a rotating part that cooperate with each other; the rotating part is fixed relative to the turntable and rotates synchronously with the turntable around the axis of the main shaft; the fixed part is fixedly disposed on the main shaft, and the fixed part and the rotating part are disposed opposite to each other along the axial direction of the main shaft, and the fixed part is used to read the angle signal when the rotating part rotates.

10. A CNC vertical lathe, characterized in that, Includes the rotary table as described in any one of claims 1-9.

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