Floating type axial chamfering control system for VVT chain wheel

Abstract

The invention relates to the technical field of chain wheel chamfering, and discloses a floating type axial chamfering control system for a VVT chain wheel, which comprises a main shaft, a chamfering piece is mounted at the bottom of the main shaft, a connecting cylinder is fixedly connected to the bottom of an output shaft of the main shaft, a floating connecting piece is mounted at the bottom of the connecting cylinder, and the floating connecting piece and the chamfering piece are mounted mutually; the control system comprises a main shaft and a chamfering piece, the main shaft is arranged on the main shaft and provides rotating force for the main shaft, a mechanical holder is installed between the outer surface of the fixed end of the main shaft and the chamfering piece and used for adjusting the axial angle of the chamfering piece, and the chamfering piece is composed of a grinding wheel and a connecting rod which are fixedly connected with each other. The problem that traditional equipment is difficult to go deep into gaps and groove cavities of VVT chain wheels for chamfering is effectively solved, the angle adjusting mechanism of the mechanical holder can drive the chamfering piece to achieve multi-angle adjustment, and the chamfering piece can be precisely attached to complex outlines in cooperation with universal ball connection at the bottom of the connecting cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of sprocket chamfering, in particular to a floating axial chamfering control system for a VVT sprocket. Background Art

[0002] The full name of VVT sprocket is variable valve timing sprocket. It is the core component of the automobile engine valve mechanism. It works in conjunction with the chain or belt to accurately control the opening time and duration of the engine valve to achieve variable valve timing function. This technology can significantly improve the engine's fuel economy, optimize power output performance, and effectively reduce exhaust emissions. It is crucial to improving the overall performance and environmental protection level of the vehicle.

[0003] In actual applications, in order to meet the needs of efficient and stable operation of the engine, the VVT sprocket needs to be chamfered. On the one hand, chamfering can optimize the assembly process, making it easier to align and insert the sprocket with the shaft or other components, reducing assembly resistance and improving installation efficiency and accuracy; on the other hand, by eliminating the sharp angles of the sprocket edge, it can effectively disperse the stress concentration caused by tension and torque during operation, avoid fatigue cracks and fracture risks, and extend the service life of components.

[0004] However, there are still some problems with the existing VVT sprocket chamfering device: First, the VVT sprocket has a complex structure, and its key parts such as the root of the tooth groove and the edge of the shaft hole need to be finely chamfered, but the existing equipment mostly uses a rigidly fixed spindle and tool structure, which can only achieve plane or shallow surface chamfering. When it is necessary to chamfer hidden areas such as the gaps and grooves of the sprocket, traditional equipment lacks the ability to dynamically adjust the spindle angle, making it difficult for the tool to accurately fit the complex contour, resulting in blind spots in processing or out-of-tolerance chamfering dimensions. Some companies try to compensate for this defect by adjusting the workbench angle or segmented clamping, but frequent clamping and positioning operations not only prolong the auxiliary processing time, but also easily introduce cumulative errors, resulting in processing accuracy that is difficult to meet the stringent requirements of the engine valve mechanism.

[0005] Secondly, when adjusting the spindle angle, existing chamfering equipment mostly relies on rigid connectors to transmit power. Once the spindle deflects, the rigid connection structure will be subjected to additional torque and bending moment, which can easily cause problems such as spindle bearing wear, transmission component and tool breakage. Especially under high-frequency and large-angle angle adjustment conditions, the coaxiality and stability of the spindle will drop sharply, and may even cause the entire spindle to be scrapped. The high cost of replacing and repairing high-precision spindles seriously restricts the company's processing efficiency and economic benefits.

[0006] To this end, the present invention proposes a floating axial chamfer control system for a VVT sprocket. Summary of the Invention

[0007] The object of the present invention is to provide a floating axial chamfering control system for a VVT sprocket to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solution: A floating axial chamfering control system for a VVT sprocket, including a main shaft, a chamfering member is installed at the bottom of the main shaft, a connecting cylinder is fixedly connected to the bottom of the output shaft of the main shaft, a floating connecting member is installed at the bottom of the connecting cylinder, the floating connecting member and the chamfering member are mutually installed and provide a rotational force for it, a mechanical pan-tilt is installed between the outer surface of the fixed end of the main shaft and the chamfering member, and the mechanical pan-tilt is used to adjust the axial angle of the chamfering member.

[0009] Preferably, the chamfering member is composed of a grinding wheel and a connecting rod, and the two are fixedly connected to each other. One end of the connecting rod close to the main shaft is a spherical structure, and a hemispherical groove adapted to the spherical structure is provided at the bottom of the connecting cylinder, and the two form a universal ball connection. The connecting rod is rotatably connected to the bottom of the mechanical pan-tilt.

[0010] Preferably, the floating connecting member includes: A bottom plate, which is fixedly connected to the surface of the connecting rod; A plurality of flexible belts, and a plurality of the flexible belts are fixedly connected to the surface of the bottom plate in a circumferential arrangement; A top plate, which is fixedly connected to the surface of the connecting cylinder and is fixedly connected to a plurality of the flexible belts.

[0011] Preferably, the flexible belt is made of an elastic material.

[0012] Preferably, a lubrication limiting member is installed inside the connecting cylinder, and the lubrication limiting member includes: An oil cavity, which is opened inside the connecting cylinder; An oil tank, which is fixedly connected to the outer surface of the connecting cylinder, and lubricating oil is provided inside the oil tank; An oil pipe, which is fixedly communicated between the oil cavity and the oil tank.

[0013] Preferably, the lubrication limiting member further includes: A plurality of placement grooves, and a plurality of the placement grooves are opened at the bottom of the oil cavity in a circumferential arrangement with the universal structure as the center; A plurality of lubrication strips, and a plurality of the lubrication strips are installed inside the corresponding placement grooves, and the lubrication strips are in contact with the spherical structure.

[0014] Preferably, the lubrication strip is made of a fiber material.

[0015] Preferably, a lubricating oil feeding device is installed inside the fuel tank and the oil chamber. The lubricating oil feeding device controls the supply of lubricating oil by detecting the thickness of the lubricating oil film on the surface of the lubricating strip.

[0016] Preferably, a moving unit and a fixture are respectively installed outside the main shaft.

[0017] Preferably, the main shaft, the mechanical pan-tilt, the moving unit, the fixture, and the lubricating oil feeding device are all electrically connected to an external controller.

[0018] Preferably, the mechanical pan-tilt includes: an angle adjustment mechanism for driving the chamfering part to rotate around the horizontal axis and / or the vertical axis to adjust the axial angle of the chamfering part; a servo drive unit, electrically connected to the external controller, for receiving an angle adjustment instruction and driving the angle adjustment mechanism to act.

[0019] Preferably, the flexible belt is made of polyurethane elastomer material, and both ends of the flexible belt are fixedly connected to the bottom plate and the top plate through vulcanization process or mechanical fasteners.

[0020] Preferably, the lubricating oil feeding device includes: an external solenoid valve installed at the connection of the fuel tank and the oil pipe for controlling the flow of lubricating oil; a capacitive contact sensor installed inside the oil chamber and arranged non-contact with the surface of the lubricating strip for detecting the thickness of the lubricating oil film on the surface of the lubricating strip; wherein, the external controller controls the opening and closing of the external solenoid valve according to the detection signal of the capacitive contact sensor to maintain the thickness of the lubricating oil film on the surface of the lubricating strip within a preset range.

[0021] Preferably, the moving unit is used to drive the main shaft to move in the X-axis, Y-axis, and Z-axis directions to adjust the position of the chamfering part; The fixture is used to fix the VVT sprocket workpiece and cooperate with the moving unit to realize the axial chamfering processing of the workpiece by the chamfering part.

[0022] Preferably, the lubricating strip is specifically made of absorbent cotton material.

[0023] Compared with the prior art, the beneficial effects of the present invention are: 1. This control system adopts a floating axial chamfering design. Through the cooperation of the mechanical pan-tilt and the universal ball connection structure, it effectively solves the problem that it is difficult for traditional equipment to chamfer deep into the gaps and cavities of the VVT sprocket. The angle adjustment mechanism of the mechanical pan-tilt can drive the chamfering part to achieve multi-angle adjustment. Combined with the universal ball connection at the bottom of the connecting cylinder, the chamfering part can accurately fit the complex contour; For example, when processing concealed areas such as the root of the sprocket tooth groove, the chamfering part can flexibly adjust the angle to avoid machining blind spots. At the same time, the flexible belt in the floating connecting piece has high elasticity. Even under the working condition of large-angle inclination, it can still compensate for the angle difference through stretching and twisting deformation, continuously and stably transmit power, ensure the effective contact between the tool and the workpiece, and achieve fine chamfering processing that cannot be completed by traditional rigid structures.

[0024] 2. The system adopts a modular structure design, significantly reducing the maintenance cost and operation difficulty. Among them, key components such as the flexible belt of the floating connecting piece and the lubricating strip of the lubricating and limiting piece are all independent modules. Both ends of the flexible belt are connected to the bottom plate and the top plate through vulcanization process or mechanical fasteners. If there is wear or fracture, it can be quickly disassembled and replaced without the need to disassemble the equipment as a whole. The lubricating strip adopts a detachable structure. When the oil storage capacity of the absorbent cotton fiber decreases due to long-term friction loss, the operator can directly take it out and replace it from the placement groove at the bottom of the oil cavity, avoiding component damage caused by lubrication failure. This modular design not only shortens the downtime for maintenance but also greatly reduces the maintenance cost, especially suitable for the production scenario of automotive parts with high requirements for processing continuity.

[0025] 3. The system realizes a low-cost transition of technology upgrade by integrating innovative modules on the traditional spindle structure. Enterprises do not need to replace the core components of the original chamfering machine tool. They only need to integrate new modules such as the mechanical cloud platform, floating connecting piece, and lubricating and limiting piece into the existing equipment to quickly complete the transformation. This design takes into account both technological advancement and equipment compatibility, significantly reducing the enterprise's technology transformation cost and implementation threshold.

[0026] 4. This system significantly improves the chamfering efficiency through multi-dimensional optimization. First, the coordinated control of the mechanical cloud platform and the moving unit realizes the rapid positioning and angle adjustment of the chamfering part. Compared with the traditional equipment that relies on manual or multiple clamping methods, it greatly reduces the auxiliary processing time. Second, the flexible belt of the floating connecting piece can quickly accumulate and release torque when the spindle rotates, driving the chamfering part to rotate at high speed, avoiding the power transmission delay caused by rigid connection. In addition, the closed-loop control of the lubricating oil feeding device ensures that the universal ball connection is always in the best lubrication state, reducing the frictional resistance and ensuring the continuity of the chamfering process. Through actual tests, when processing the VVT sprocket with complex contours, the processing efficiency of this system is improved compared with traditional equipment, effectively meeting the needs of large-scale production of automotive parts.

[0027] 5. When the traditional chamfering equipment adjusts the spindle angle, the rigid connecting piece is prone to wear or even breakage of the spindle bearing due to the concentration of torque and bending moment. However, the flexible belt adopted by this system can absorb the stress generated by the angle change, avoiding direct impact on the spindle. At the same time, the universal ball connection structure evenly disperses the radial force through the cooperation of the spherical structure and the hemispherical groove, preventing the chamfering part from being overstressed. In addition, the capacitive contact sensor in the lubrication limiting part real-time monitors the oil film thickness of the lubrication strip. When the oil film is lower than the threshold value, it automatically replenishes lubricating oil to ensure that the universal ball connection surface is always in a lubricated state, reducing friction and wear. Brief Description of the Drawings

[0028] Figure 1 is a front three-dimensional schematic view of the main structure of the present invention; Figure 2 is a front three-dimensional schematic view of the assembly of the main structure of the present invention and the chamfering machine tool; Figure 3 is a front plane schematic view of the assembly of the main structure of the present invention and the chamfering machine tool; Figure 4 is a side three-dimensional schematic view of the assembly of the main structure of the present invention and the chamfering machine tool; Figure 5 is a partial three-dimensional schematic view of the main structure of the present invention; Figure 6 For the present invention Figure 5 is a three-dimensional schematic view of the enlarged structure at position A in; Figure 7 For the present invention Figure 5 is a three-dimensional schematic view of the enlarged structure at position B in; Figure 8 is a sectional three-dimensional schematic view of the main structure of the present invention; Figure 9 For the present invention Figure 8 is a three-dimensional schematic view of the enlarged structure at position C in; Figure 10 is a three-dimensional schematic view of the mechanical cloud platform, floating connecting piece and connecting cylinder of the present invention.

[0029] In the figure: 11. Spindle; 12. Chamfering part; 13. Moving unit; 14. Fixture.

[0030] 21. Mechanical cloud platform; 22. Floating connecting piece; 221. Bottom plate; 222. Flexible belt; 223. Top plate; 23. Connecting cylinder; 24. Lubrication limiting part; 241. Oil cavity; 242. Lubrication strip; 243. Oil pipe; 244. Oil tank. Detailed Embodiments

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] It should be noted that the main shaft 11 only provides the rotation function for the chamfering part 12, the mechanical pan-tilt 21 only provides the function of changing the angle of the chamfering part 12, the lubricating oil feeding device only provides the function of feeding lubricating oil, and the moving unit 13 only provides the moving function for the main shaft 11. The working principles and specific structures of the above-mentioned structures are all prior arts. Therefore, due to the generality of the above-mentioned structures, the specific principles will not be described in detail hereinafter.

[0033] Please refer to Figures 1 to 10 , the present invention provides an embodiment: A floating axial chamfering control system for a VVT sprocket, comprising a main shaft 11, a chamfering part 12 is installed at the bottom of the main shaft 11, a connecting cylinder 23 is fixedly connected to the bottom of the output shaft of the main shaft 11, a floating connecting part 22 is installed at the bottom of the connecting cylinder 23, the floating connecting part 22 is installed with the chamfering part 12 and provides a rotational force for it, and a mechanical pan-tilt 21 is installed between the outer surface of the fixed end of the main shaft 11 and the chamfering part 12, and the mechanical pan-tilt 21 is used to adjust the axial angle of the chamfering part

[0034] It should be noted that the chamfering member 12 is composed of a grinding wheel and a connecting rod, which are fixedly connected to each other. One end of the connecting rod close to the main shaft 11 is a spherical structure. A hemispherical groove adapted to the spherical structure is provided at the bottom of the connecting cylinder 23. The two form a universal ball connection, allowing the connecting rod to rotate around the horizontal axis and the vertical axis within the range of ±30°, while restricting the radial displacement. The connecting rod is rotatably connected to the bottom of the mechanical pan-tilt 21. The floating connecting member 22 includes: a bottom plate 221, which is fixedly connected to the surface of the connecting rod; a plurality of flexible belts 222, which are arranged in a circular pattern and fixedly connected to the surface of the bottom plate 221; a top plate 223, which is fixedly connected to the surface of the connecting cylinder 23 and is fixedly connected to the plurality of flexible belts 222. The flexible belts 222 are made of an elastic material. A lubrication limiting member 24 is installed inside the connecting cylinder 23. The lubrication limiting member 24 includes: an oil cavity 241, which is opened inside the connecting cylinder 23; an oil tank 244, which is fixedly connected to the outer surface of the connecting cylinder 23, and lubricating oil is provided inside the oil tank 244; an oil pipe 243, which is fixedly communicated between the oil cavity 241 and the oil tank 244. The lubrication limiting member 24 further includes: a plurality of placement grooves, which are arranged in a circular pattern with the universal structure as the center and opened at the bottom of the oil cavity 241; a plurality of lubrication strips 242, which are all installed inside the corresponding placement grooves and are in contact with the spherical structure. The lubrication strips 242 are made of a fiber material. A lubricating oil feeding device is installed inside the oil tank 244 and the oil cavity 241. The lubricating oil feeding device controls the supply of lubricating oil by detecting the thickness of the lubricating oil film on the surface of the lubrication strip 242. A moving unit 13 and a fixture 14 are respectively installed outside the main shaft 11. The main shaft 11, the mechanical pan-tilt 21, the moving unit 13, the fixture 14, and the lubricating oil feeding device are all electrically connected to an external controller. The mechanical pan-tilt 21 includes: an angle adjustment mechanism, which is used to drive the chamfering member 12 to rotate around the horizontal axis and / or the vertical axis to adjust the axial angle of the chamfering member 12; a servo drive unit, which is electrically connected to the external controller and is used to receive an angle adjustment instruction and drive the angle adjustment mechanism to act. The flexible belts 222 are made of polyurethane elastomer material, and both ends of the flexible belts 222 are fixedly connected to the bottom plate 221 and the top plate 223 respectively through a vulcanization process or mechanical fasteners. The lubricating oil feeding device includes: an external solenoid valve, which is installed at the connection between the oil tank 244 and the oil pipe 243 and is used to control the flow of lubricating oil; a capacitive contact sensor, which is installed inside the oil cavity 241 and is arranged non-contact with the surface of the lubrication strip 242 and is used to detect the thickness of the lubricating oil film on the surface of the lubrication strip 242. Among them, the external controller controls the opening and closing of the external solenoid valve according to the detection signal of the capacitive contact sensor to maintain the thickness of the lubricating oil film on the surface of the lubrication strip 242 within a preset range. The moving unit 13 is used to drive the main shaft 11 to move in the X-axis, Y-axis, and Z-axis directions to adjust the position of the chamfering member 12;The fixture 14 is used to fix the VVT sprocket workpiece and cooperate with the moving unit 13 to achieve the axial chamfering of the workpiece by the chamfering part 12. The lubricating strip 242 is specifically made of absorbent cotton. An external annular support base is provided at the bottom of the mechanical pan-tilt 21. The external annular support base is rotatably connected to the middle of the connecting rod and provides radial constraint through a high-precision bearing to ensure that the coaxiality error during the rotation of the chamfering part 12 is ≤0.02 mm.;

[0035] It should be noted that components such as the main shaft 11 and the moving unit 13 are all integrated on the chamfering machine tool, and the machine tool provides stable power input and machining reference.

[0036] Specifically, first, the VVT sprocket workpiece is fixed on the fixture 14, and then, the external controller starts the main shaft 11 and the moving unit 13.

[0037] The moving unit 13 drives the main shaft 11 to move along the X, Y, and Z axes, and adjusts the chamfering part 12 to the position where the workpiece is to be machined; at the same time, the main shaft 11 starts to rotate, driving the connecting cylinder 23 to rotate synchronously.

[0038] The rotational power of the main shaft 11 is transmitted to the floating connecting piece 22 through the connecting cylinder 23. Specifically, the top plate 223 at the bottom of the connecting cylinder 23 rotates with the connecting cylinder 23, driving the circumferentially distributed flexible belt 222. Since the flexible belt 222 is made of polyurethane elastomer material and has high elasticity and flexibility, when the top plate 223 rotates, the flexible belt 222 generates torsional deformation due to elastic deformation and accumulates torque, and then drives the bottom plate 221 to rotate through the accumulated torque force. The bottom plate 221 is fixed to the connecting rod of the chamfering part 12, thereby driving the chamfering part 12 to rotate at high speed to perform axial chamfering on the VVT sprocket workpiece.

[0039] During this process, the mechanical pan-tilt 21 restricts the radial displacement of the chamfering part 12 through a stable support structure to ensure its coaxiality and stability during rotation; When the chamfering part 12 needs to penetrate into the gap of the workpiece or adapt to complex chamfering angles, the external controller sends an instruction to the servo drive unit of the mechanical pan-tilt 21 to drive the angle adjustment mechanism to act. The mechanical pan-tilt 21 drives the chamfering part 12 to rotate around the horizontal axis and / or the vertical axis to adjust the axial angle. At this time, the spherical structure of the connecting rod of the chamfering part 12 rotates flexibly within the universal ball connection structure at the bottom of the connecting cylinder 23 to achieve multi-angle adjustment.

[0040] It should be noted that the elastic characteristics of the flexible belt 222 play a key role in this process: it can continuously transmit power within a certain range of angular deviation. Even if the chamfering part 12 tilts, the flexible belt 222 can still compensate for the angular difference through stretching and twisting deformation, ensuring stable power transmission to the chamfering part 12 and maintaining continuous processing. At the same time, several flexible belts 222 are symmetrically distributed in a circle, ensuring that regardless of whether the main shaft 11 rotates forward or backward, the torque generated by elastic deformation can be synchronously transmitted to the bottom plate 221 through the symmetrical flexible belts 222, avoiding eccentric loading caused by unidirectional force.

[0041] In addition, the lubricating oil in the fuel tank 244 flows into the oil cavity 241 of the connecting cylinder 23 through the oil pipe 243 and infiltrates the lubricating strip 242 installed in the placement groove at the bottom of the oil cavity 241. The micron-level pores between the degreased cotton fibers form a capillary network, which sucks in and stores the lubricating oil through surface tension. When the spherical structure squeezes the lubricating strip 242, the pore volume is compressed, forcing the lubricating oil to seep out along the fiber gaps to form a lubricating oil film with a uniform thickness on the friction surface.

[0042] It should be noted that the lubricating strip 242 is a detachable structure, and the worn lubricating strip 242 can be replaced regularly.

[0043] During the above process, the lubricating oil feeding device monitors the thickness of the lubricating oil film on the surface of the lubricating strip 242 in real time through a capacitive contact sensor. When the sensor detects that the oil film thickness is lower than the preset threshold, it sends a signal to the external controller, and the controller immediately opens the external solenoid valve at the connection of the fuel tank 244 and the oil pipe 243 to supplement the lubricating oil; When the oil film thickness reaches the upper limit threshold, the solenoid valve closes to avoid excessive consumption of lubricating oil.

[0044] Through closed-loop control, the system can dynamically maintain the optimal lubrication state of the lubricating strip 242, effectively reduce the friction coefficient of the spherical structure, reduce wear, and use the viscosity of the lubricating oil to provide buffering for the universal ball connection, limit the excessive floating of the chamfering part 12, prevent it from falling off or becoming loose due to uneven force, and ensure the stability and reliability of the processing process. Compared with the traditional rigid connection chamfering device, the present invention solves the problems of power interruption and connection stability during complex angle chamfering through the collaborative design of elastic force transmission by the flexible belt 22 to and floating connection of the universal ball, not only improving the processing accuracy but also extending the service life of the chamfering part 12.

[0045] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0046] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A floating axial chamfering control system for a VVT sprocket, comprising a main shaft (11), and a chamfering member (12) is installed at the bottom of the main shaft (11), characterized in that: A connecting cylinder (23) is fixedly connected to the bottom of the output shaft of the main shaft (11). A floating connecting member (22) is installed at the bottom of the connecting cylinder (23), and the floating connecting member (22) is installed with the chamfering member (12) and provides rotational power for it. A mechanical pan-tilt (21) is installed between the outer surface of the fixed end of the main shaft (11) and the chamfering member (12), and the mechanical pan-tilt (21) is used to adjust the axial angle of the chamfering member (12).

2. The floating axial chamfering control system for a VVT sprocket according to claim 1, wherein: The chamfering member (12) is composed of a grinding wheel and a connecting rod, and the two are fixedly connected to each other. One end of the connecting rod close to the main shaft (11) is a spherical structure. A hemispherical groove adapted to the spherical structure is provided at the bottom of the connecting cylinder (23), and the two form a universal ball connection. The connecting rod is rotatably connected to the bottom of the mechanical pan-tilt (21).

3. A floating axial chamfering control system for a VVT sprocket according to claim 1, characterized in that: The floating connecting member (22) includes: A bottom plate (221), and the bottom plate (221) is fixedly connected to the surface of the connecting rod; A plurality of flexible belts (222), and the plurality of flexible belts (222) are fixedly connected to the surface of the bottom plate (221) in a circumferential arrangement; A top plate (223), and the top plate (223) is fixedly connected to the surface of the connecting cylinder (23), and is fixedly connected to the plurality of flexible belts (222).

4. A floating axial chamfering control system for a VVT sprocket according to claim 3, characterized in that: The flexible belt (222) is made of an elastic material.

5. A floating axial chamfer control system for a VVT sprocket according to claim 1, characterized in that: A lubricating and limiting member (24) is installed inside the connecting cylinder (23), and the lubricating and limiting member (24) includes: An oil cavity (241), and the oil cavity (241) is opened inside the connecting cylinder (23); An oil tank (244), and the oil tank (244) is fixedly connected to the outer surface of the connecting cylinder (23), and lubricating oil is provided inside the oil tank (244); An oil pipe (243), and the oil pipe (243) is fixedly communicated between the oil cavity (241) and the oil tank (244).

6. The floating axial chamfer control system for a VVT sprocket according to claim 5, wherein: The lubricating and limiting member (24) further includes: A plurality of placement grooves, and the plurality of placement grooves are opened at the bottom of the oil cavity (241) in a circumferential arrangement with the universal structure as the center; A plurality of lubricating strips (242), and the plurality of lubricating strips (242) are all installed inside the corresponding placement grooves, and the lubricating strips (242) are in contact with the spherical structure.

7. A floating axial chamfering control system for a VVT sprocket according to claim 6, characterized in that: The lubricating strip (242) is made of a fiber material.

8. A floating axial chamfer control system for a VVT sprocket according to claim 6, characterized in that: A lubricating oil feeding device is installed inside the oil tank (244) and the oil cavity (241), and the lubricating oil feeding device controls the supply of lubricating oil by detecting the thickness of the lubricating oil film on the surface of the lubricating strip (242).

9. A floating axial chamfer control system for a VVT sprocket according to claim 1, characterized in that: A moving unit (13) and a fixture (14) are respectively installed outside the main shaft (11).

10. A floating axial chamfering control system for a VVT sprocket according to claim 9, characterized in that: The main shaft (11), the mechanical pan-tilt (21), the moving unit (13), the fixture (14), and the lubricating oil feeding device are all electrically connected to an external controller.

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