Embedded locking zero-backlash hub bearing machining numerical control lathe

Abstract

The utility model discloses an embedded locking zero play hub bearing processing is with numerical control lathe, including bottom plate and telescopic column, the top of bottom plate is installed telescopic column, the inside of telescopic column is provided with telescopic link, telescopic link penetrates telescopic column and extends to its outside, the top of telescopic link is installed with horizontal screw rod moving subassembly, the output of horizontal screw rod moving subassembly is installed with longitudinal screw rod moving subassembly. The utility model not only realized bearing processing is with numerical control lathe convenient adjustment position and angle to bearing processing, has been convenient to bearing self -transmission adjustment position, has increased the range of processing, and has been convenient to bearing and has been fixed tightly, has improved bearing processing is with numerical control lathe processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC lathes for bearing processing, specifically a CNC lathe for processing embedded locking zero-back wheel hub bearings. Background Technology

[0002] Embedded locking zero-clearance wheel hub bearings are a high-precision, high-rigidity bearing design, mainly used in applications requiring strict limitation of axial and radial clearance, such as precision machinery, robotics, aerospace, or high-end automotive wheel hub systems. CNC lathes for wheel hub bearing machining are CNC machine tools specifically designed for machining automotive wheel hubs and bearings, possessing high-precision and high-efficiency automated machining capabilities.

[0003] For example, the CNC lathe for bearing processing disclosed in the authorization announcement number CN221621648U includes a machining table, a control panel installed on the side wall of the machining table, a receiver installed on the side wall of the support plate, a laser diode installed on the receiver, an alarm light installed on the side wall of the support plate, the alarm light being connected to the control panel through an internal circuit, a tool head welded around the tool holder, and the laser diode being arranged opposite to the tool head; Although it achieves the goal of emitting a laser beam to the cutter head via a laser diode, the laser beam is reflected back to the receiver after encountering the side wall of the cutter head. The receiver receives the laser beam and performs signal processing. The signal processing involves the receiver internally calculating the time difference between the laser beam transmission and reception, and calculating the distance between the side wall of the cutter head and the laser diode based on the speed of light. The receiver sends the processed signal to the control panel through the circuit. The control panel controls the alarm light to turn on based on the processed signal. When the wear of the cutter head exceeds the accuracy value, the control panel controls the alarm light to turn on, which realizes the prompt of the cutter head's unqualified accuracy, which is beneficial to improving the detection efficiency of the cutter head and at the same time improving the bearing's pass rate; However, this does not solve the problem that existing CNC lathes for bearing processing are generally not conducive to convenient adjustment of the position and angle of the bearing during use, are not convenient for adjusting the bearing's self-rotation position, thus affecting the processing range, and are not convenient for tightening and fixing the bearing, thereby affecting the processing efficiency of CNC lathes for bearing processing. Utility Model Content

[0004] The purpose of this utility model is to provide a CNC lathe for machining embedded locking zero-back hub bearings, so as to solve the problems mentioned in the background art that the CNC lathe for machining bearings is not convenient to adjust the position and angle for machining bearings, not convenient to adjust the position of the bearing self-rotation, which affects the machining range, and not convenient to tighten and fix the bearing, which affects the machining efficiency of the CNC lathe for machining bearings.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A CNC lathe for machining embedded locking zero-back wheel hub bearings, comprising a base plate and a telescopic column. The telescopic column is mounted on the top of the base plate, and a telescopic rod is provided inside the telescopic column, extending through the telescopic column to its exterior. A transverse lead screw moving assembly is mounted on the top of the telescopic rod, and a longitudinal lead screw moving assembly is mounted on the output end of the transverse lead screw moving assembly. A rotary disk is provided outside the base plate, and three sets of U-shaped frames with equal spacing are mounted on the top of the rotary disk. A support plate is mounted on the top of each U-shaped frame, and each support plate has a... The system includes a rotating disk, an L-shaped arm mounted at the output end of the longitudinal lead screw moving assembly, a stepper motor mounted at the bottom end of the L-shaped arm, a rotating shaft mounted at the output end of the stepper motor, a power motor mounted at the output end of the rotating shaft, a cutting tool mounted at the output end of the power motor, servo motors symmetrically mounted inside the telescopic column, and a first threaded rod mounted at the output end of each servo motor. Each first threaded rod extends to the top of the telescopic column and is movably connected thereto. A first threaded block is fitted onto the surface of each first threaded rod, and the first threaded rod is threadedly connected to the first threaded block, which is then connected to the telescopic rod.

[0006] Preferably, a variable frequency motor is installed on the top side of the base plate away from the telescopic column, a worm gear is installed at the output end of the variable frequency motor, a rotating column is installed at the bottom end of the rotating disk, the rotating column extends into the interior of the base plate and is movably connected thereto, a worm wheel is fitted on the surface of the rotating column, and the worm gear meshes with the worm wheel.

[0007] Preferably, a first motor is installed at the bottom of each support plate, a small gear is installed at the output end of each first motor, a rotating column is movably installed inside each support plate, the rotating column extends through the support plate to its outside, a large gear is installed at the bottom of each rotating column, the small gear meshes with the large gear, and the top of the rotating column is connected to the rotating disk.

[0008] Preferably, the top of each support plate is equipped with four sets of equally spaced support frames, each support frame has a movably installed roller, the roller is slidably connected to the rotating disk, and the top of each rotating disk is equipped with a hollow column.

[0009] Preferably, each of the hollow columns is equipped with a dual-axis motor, and each of the dual-axis motors has a second threaded rod installed at its output end.

[0010] Preferably, the second threaded rods extend to both sides of the hollow column and are movably connected thereto. The surfaces of the second threaded rods are fitted with second threaded blocks, and the second threaded blocks extend through the hollow column to its exterior.

[0011] Preferably, three sets of first shafts with equal spacing are movably mounted on the surface of the second threaded block, and a connecting arm is fitted on the surface of each first shaft. A second shaft is movably mounted on the end of each connecting arm away from the first shaft.

[0012] Preferably, the hollow column is provided with three sets of top plates at equal intervals on its exterior, and the second shaft is movably connected to the top plates.

[0013] Compared with the prior art, the beneficial effects of this utility model are: this CNC lathe for bearing processing not only enables convenient adjustment of the position and angle for bearing processing, facilitating the self-rotation adjustment of the bearing position and increasing the processing range, but also facilitates the clamping and fixing of the bearing, thus improving the processing efficiency of the CNC lathe for bearing processing. The transverse lead screw moving assembly drives the longitudinal lead screw moving assembly, L-arm, stepper motor, power motor, and cutting tool to move. The longitudinal lead screw moving assembly drives the L-arm, stepper motor, power motor, and cutting tool to move. The stepper motor drives the rotary shaft to rotate, the rotary shaft drives the power motor to rotate, and the power motor drives the cutting tool to rotate, so that the cutting tool moves to the top of the bearing. The servo motor drives the first threaded rod to rotate, the first threaded rod drives the first threaded block to move downward. The first threaded block drives the telescopic rod, transverse lead screw moving assembly, longitudinal lead screw moving assembly, L-arm, and cutting tool to move downward, so that the cutting tool moves to the surface of the bearing for processing. The stepper motor drives the rotary shaft to rotate, the rotary shaft drives the power motor and cutting tool to rotate for processing. This enables the CNC lathe for bearing processing to conveniently adjust the position and angle for processing the bearing, facilitates multi-position movement and rotation for processing, and improves the convenience of adjusting the position and angle for processing the bearing on the CNC lathe for bearing processing. The first motor drives the pinion to rotate, which in turn drives the large gear to rotate. The large gear then drives the rotating column to rotate. With the sliding connection between the roller and the rotating disk, the rotating column drives the rotating disk, the hollow column, and the bearing to rotate around the rotating column as an axis to adjust their positions for processing. When multiple sets of bearings need to be processed sequentially, the bearings are fixed sequentially. The variable frequency motor drives the worm gear to rotate, which in turn drives the worm wheel to rotate. The worm wheel drives the rotating column and the rotating disk to rotate, and the rotating disk drives the processed bearing to rotate to one side. The bearing to be processed is then rotated to the processing area. This allows the CNC lathe for bearing processing to conveniently adjust the position of the bearing by rotation, increasing the processing range and improving the processing efficiency of the CNC lathe for bearing processing. A dual-axis motor drives two sets of second threaded rods to rotate. The second threaded rods drive the second threaded blocks to move in opposite directions. The second threaded blocks drive the connecting arms to move in opposite directions through the first shaft. The connecting arms drive the second shaft and the top plate to open outward, so that the three sets of top plates tighten and fix the bearing. This enables the CNC lathe for bearing processing to conveniently tighten and fix the bearing, avoids shaking due to improper fixing, and improves the convenience of tightening and fixing the bearing on the CNC lathe for bearing processing. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view structural diagram of the present utility model; Figure 3 This is a three-dimensional structural diagram of the L-shaped arm of this utility model; Figure 4 This is a three-dimensional structural diagram of the stepper motor of this utility model; Figure 5 This is a front view cross-sectional structural diagram of the telescopic column of this utility model; Figure 6 This is a three-dimensional structural diagram of the worm gear of this utility model; Figure 7 This is a three-dimensional structural diagram of the rotating disk of this utility model; Figure 8 This is a three-dimensional structural diagram of the rotating column of this utility model; Figure 9 This is a schematic diagram of the three-dimensional structure of the hollow column of this utility model.

[0015] In the diagram: 1. Base plate; 2. Telescopic column; 3. Telescopic rod; 4. Lateral lead screw moving assembly; 5. Longitudinal lead screw moving assembly; 6. Rotary disk; 7. U-shaped frame; 8. Support plate; 9. Rotating disk; 10. L-shaped arm; 11. Stepper motor; 12. Rotating shaft; 13. Power motor; 14. Servo motor; 15. First threaded rod; 16. First threaded block; 17. Variable frequency motor; 18. Worm gear; 19. Rotating column; 20. Worm wheel; 21. First motor; 22. Small gear; 23. Rotating column; 24. Large gear; 25. Roller; 26. Support frame; 27. Hollow column; 28. Dual-axis motor; 29. ​​Second threaded rod; 30. Second threaded block; 31. First shaft; 32. Connecting arm; 33. Second shaft; 34. Top plate; 35. Cutting tool. Detailed Implementation

[0016] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, 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., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0019] Example 1 Please see Figures 1 to 9This utility model provides an embodiment of a CNC lathe for machining embedded locking zero-back hub bearings, comprising a base plate 1 and a telescopic column 2. The telescopic column 2 is mounted on the top of the base plate 1, and a telescopic rod 3 is provided inside the telescopic column 2, extending through the telescopic column 2 to its exterior. A transverse lead screw moving assembly 4 is mounted on the top of the telescopic rod 3, and a longitudinal lead screw moving assembly 5 is mounted on the output end of the transverse lead screw moving assembly 4. A rotary disk 6 is provided on the exterior of the base plate 1, and three sets of U-shaped frames 7 with equal spacing are mounted on the top of the rotary disk 6. Each U-shaped frame 7 has a support plate 8 mounted on its top, and each support plate 8 has a rotating disk 9 mounted on its top. The longitudinal lead screw moving assembly... The output end of component 5 is equipped with an L-shaped arm 10, the bottom end of the L-shaped arm 10 is equipped with a stepper motor 11, the output end of the stepper motor 11 is equipped with a rotating shaft 12, the output end of the rotating shaft 12 is equipped with a power motor 13, the output end of the power motor 13 is equipped with a cutter 35, the inside of the telescopic column 2 is symmetrically equipped with servo motors 14, the output end of each servo motor 14 is equipped with a first threaded rod 15, the first threaded rod 15 extends to the top of the telescopic column 2 and is movably connected thereto, the surface of each first threaded rod 15 is fitted with a first threaded block 16, the first threaded rod 15 is threadedly connected to the first threaded block 16, and the first threaded block 16 is connected to the telescopic rod 3; Embedded locking zero-backlash hub bearings are high-precision, high-rigidity bearing structures with stringent precision requirements. They necessitate a special locking structure to avoid stress concentration caused by traditional keyways or press-fitting, achieving zero-backlash machining with no relative sliding. When using a CNC lathe to machine embedded locking zero-backlash hub bearings, the bearing is fixed, the transverse lead screw moving assembly 4 is opened, and supported by the telescopic rod 3, the transverse lead screw moving assembly 4 drives the longitudinal lead screw moving assembly 5, L-shaped arm 10, stepper motor 11, power motor 13, and tool 35 to move. The longitudinal lead screw moving assembly 5 is opened, and supported by the transverse lead screw moving assembly 4, the longitudinal lead screw moving assembly 5 drives the L-shaped arm 10, stepper motor 11, power motor 13, and tool 35 to move. The stepper motor 11 is opened, and supported by the L-shaped arm 10, the stepper motor 11 drives the rotary shaft 12 to rotate, which in turn drives the power motor 13 to rotate. The power motor 13 is then opened, and the power motor 13 drives the tool. The tool 35 rotates, moving it above the bearing. Two sets of servo motors 14 are activated. Supported by the telescopic column 2, the servo motors 14 drive the first threaded rod 15 to rotate. With the threaded connection between the first threaded rod 15 and the first threaded block 16, the first threaded rod 15 drives the first threaded block 16 to move downward. The first threaded block 16 drives the telescopic rod 3, the transverse lead screw moving assembly 4, the longitudinal lead screw moving assembly 5, the L-shaped arm 10, and the tool 35 to move downward, allowing the tool 35 to move to the surface of the bearing for processing. When a rotation angle is required for processing, the stepper motor 11 is activated. Supported by the L-shaped arm 10, the stepper motor 11 drives the rotating shaft 12 to rotate. The rotating shaft 12 drives the power motor 13 and the tool 35 to rotate for processing. This enables convenient adjustment of the position and angle of the bearing for processing on the CNC lathe, facilitating multi-position movement and rotation for processing, and improving the convenience of adjusting the position and angle of the bearing for processing on the CNC lathe. A variable frequency motor 17 is installed on the top side of the base plate 1 away from the telescopic column 2. A worm gear 18 is installed at the output end of the variable frequency motor 17. A rotating column 19 is installed at the bottom end of the rotating disk 6. The rotating column 19 extends into the interior of the base plate 1 and is movably connected thereto. A worm wheel 20 is fitted on the surface of the rotating column 19. The worm gear 18 meshes with the worm wheel 20. A first motor 21 is installed at the bottom of each support plate 8. A small gear 22 is installed at the output end of each first motor 21. A rotating column 23 is movably installed inside each support plate 8. The rotating column 23 extends through the support plate 8 to its outside. A large gear 24 is installed at the bottom of each rotating column 23. The small gear 22 meshes with the large gear 24. The top of the rotating column 23 is connected to the rotating disk 9. The top of each support plate 8 is equipped with four sets of equally spaced support frames 26. Each support frame 26 has a movably installed roller 25 inside. The roller 25 is slidably connected to the rotating disk 9. The top of each rotating disk 9 is equipped with a hollow column 27. When the bearing needs to be rotated for position adjustment, the first motor 21 is turned on. Supported by the support plate 8, the first motor 21 drives the pinion 22 to rotate. With the pinion 22 meshing with the large gear 24, the pinion 22 drives the large gear 24 to rotate, which in turn drives the rotating column 23 to rotate. Through the sliding connection between the roller 25 and the rotating disk 9, the rotating column 23 drives the rotating disk 9, the hollow column 27, and the bearing to rotate around the rotating column 23 as an axis for position adjustment. When multiple sets of bearings need to be processed sequentially, the bearings are arranged according to... The first step involves fixing the bearing in place and turning on the variable frequency motor 17. With the support of the base plate 1, the variable frequency motor 17 drives the worm gear 18 to rotate. Under the meshing of the worm gear 18 and the worm wheel 20, the worm gear 18 drives the worm wheel 20 to rotate. The worm wheel 20 drives the rotating column 19 and the rotating disk 6 to rotate. The rotating disk 6 drives the finished bearing to rotate to one side, thus rotating the bearing to be processed to the processing area. This allows the CNC lathe for bearing processing to conveniently adjust the bearing's self-rotation position, increases the processing range, and improves the processing efficiency of the CNC lathe for bearing processing. The hollow column 27 is equipped with a dual-axis motor 28, and the output end of the dual-axis motor 28 is equipped with a second threaded rod 29. The second threaded rods 29 all extend to both sides of the hollow column 27 and are movably connected thereto. The surfaces of the second threaded rods 29 are all fitted with second threaded blocks 30, and the second threaded blocks 30 all penetrate the hollow column 27 and extend to its exterior. The surface of the second threaded block 30 is movably mounted with three sets of first shafts 31 at equal intervals. The surface of each first shaft 31 is fitted with a connecting arm 32. The end of the connecting arm 32 away from the first shaft 31 is movably mounted with a second shaft 33. The hollow column 27 is provided with three sets of top plates 34 at equal intervals on the outside, and the second shaft 33 is movably connected to the top plate 34; When it is necessary to fix and tighten the bearing, place the bearing outside the three sets of top plates 34, turn on the dual-axis motor 28, and under the support of the hollow column 27, the dual-axis motor 28 drives the two sets of second threaded rods 29 to rotate. With the threaded connection between the second threaded rods 29 and the second threaded blocks 30, the second threaded rods 29 drive the second threaded blocks 30 to move towards each other. The second threaded blocks 30 drive the connecting arms 32 to move towards each other through the first shaft 31. The connecting arms 32 drive the second shaft 33 and the top plates 34 to open outward, so that the three sets of top plates 34 tighten and fix the bearing. This realizes the convenient tightening and fixing of the bearing on the CNC lathe for bearing processing, avoids the shaking caused by improper fixing, and improves the convenience of tightening and fixing the bearing on the CNC lathe for bearing processing.

[0020] Work steps The transverse lead screw moving assembly 4 drives the longitudinal lead screw moving assembly 5, L-shaped arm 10, stepper motor 11, power motor 13, and cutter 35 to move. The longitudinal lead screw moving assembly 5 drives the L-shaped arm 10, stepper motor 11, power motor 13, and cutter 35 to move. The stepper motor 11 drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the power motor 13 to rotate. When the power motor 13 is turned on, it drives the cutter 35 to rotate, causing the cutter 35 to move above the bearing. The servo motor 14 drives the first threaded rod 15 to rotate. The first threaded rod 15 drives the first threaded block 16 to move downwards. The first threaded block 16 drives the telescopic rod 3, the transverse lead screw moving assembly 4, the longitudinal lead screw moving assembly 5, the L-shaped arm 10, and the cutting tool 35 to move downwards, so that the cutting tool 35 moves to the surface of the bearing for machining. When rotation angle machining is required, the stepper motor 11 drives the rotating shaft 12 to rotate. The rotating shaft 12 drives the power motor 13 and the cutting tool 35 to rotate for machining. When the bearing needs to be rotated to adjust its position, the first motor 21 drives the pinion 22 to rotate. The small gear 22 drives the large gear 24 to rotate, which in turn drives the rotating column 23 to rotate. With the roller 25 slidingly connected to the rotating disk 9, the rotating column 23 drives the rotating disk 9, the hollow column 27, and the bearings to rotate around the rotating column 23 as an axis to adjust their positions for machining. When multiple sets of bearings need to be machined sequentially, the bearings are fixed in sequence. The variable frequency motor 17 drives the worm gear 18 to rotate, which in turn drives the worm wheel 20 to rotate. The worm wheel 20 drives the rotating column 19 and the rotating disk 6 to rotate, and the rotating disk 6 drives the machined bearings to... The machine tool is rotated to one side, and the bearing to be processed is rotated to the processing area. When it is necessary to fix and tighten the bearing, the bearing is placed outside the three sets of top plates 34. The dual-axis motor 28 drives the two sets of second threaded rods 29 to rotate. The second threaded rods 29 drive the second threaded blocks 30 to move towards each other. The second threaded blocks 30 drive the connecting arms 32 to move towards each other through the first shaft 31. The connecting arms 32 drive the second shaft 33 and the top plates 34 to open outward, so that the three sets of top plates 34 tighten and fix the bearing, thus completing the use of the CNC lathe for bearing processing.

[0021] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An embedded locking zero-backlash hub bearing machining numerical control lathe, characterized in that: The system includes a base plate and a telescopic column. The telescopic column is mounted on the top of the base plate. A telescopic rod is installed inside the telescopic column, extending through it to the outside. A transverse lead screw moving assembly is mounted on the top of the telescopic rod. A longitudinal lead screw moving assembly is mounted at the output end of the transverse lead screw moving assembly. A rotating disk is located outside the base plate. Three equally spaced U-shaped frames are mounted on the top of the rotating disk. A support plate is mounted on the top of each U-shaped frame. A rotating disk is mounted on the top of each support plate. An L-shaped arm is mounted at the output end of the longitudinal lead screw moving assembly. A stepper motor is mounted at the bottom end of the L-shaped arm. A rotating shaft is mounted on the output end of the stepper motor. A power motor is mounted on the output end of the rotating shaft. A cutting tool is mounted on the output end of the power motor. Servo motors are symmetrically mounted inside the telescopic column. A first threaded rod is mounted on the output end of each servo motor. Each first threaded rod extends to the top of the telescopic column and is movably connected thereto. A first threaded block is fitted onto the surface of each first threaded rod. The first threaded rod and the first threaded block are threadedly connected. The first threaded block is connected to the telescopic rod.

2. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 1, characterized in that: A variable frequency motor is installed on the top of the base plate away from the telescopic column. A worm gear is installed at the output end of the variable frequency motor. A rotating column is installed at the bottom end of the rotating disk. The rotating column extends into the interior of the base plate and is movably connected thereto. A worm wheel is fitted on the surface of the rotating column, and the worm gear meshes with the worm wheel.

3. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 2, characterized in that: Each support plate is equipped with a first motor at its bottom end, and a small gear is installed at the output end of each first motor. A rotating column is movably installed inside each support plate, and the rotating column extends through the support plate to its outside. A large gear is installed at the bottom end of each rotating column, and the small gear meshes with the large gear. The top end of each rotating column is connected to a rotating disk.

4. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 3, characterized in that: The top of each support plate is equipped with four sets of equally spaced support frames. Each support frame has a movably installed roller inside. The rollers are slidably connected to the rotating disk. The top of each rotating disk is equipped with a hollow column.

5. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 4, characterized in that: Each hollow column is equipped with a dual-axis motor, and each dual-axis motor has a second threaded rod installed at its output end.

6. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 5, characterized in that: The second threaded rods extend to both sides of the hollow column and are movably connected thereto. The surfaces of the second threaded rods are fitted with second threaded blocks, which extend through the hollow column to its exterior.

7. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 6, characterized in that: The surface of the second threaded block is movably mounted with three sets of first shafts at equal intervals. The surface of each first shaft is fitted with a connecting arm, and the end of each connecting arm away from the first shaft is movably mounted with a second shaft.

8. The numerical control lathe for machining the embedded lock zero free hub bearing according to claim 7, characterized in that: The hollow column is provided with three sets of top plates at equal intervals on the outside, and the second shaft is movably connected to the top plates.

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