A carbon fiber bicycle front fork rotation surface polishing device

Abstract

The application discloses a carbon fiber bicycle front fork rotary surface polishing device and relates to the technical field of carbon fiber part machining. A basic support and feeding assembly constitutes a static framework and a linear motion reference of the device. A centering and clamping rotating assembly is installed on the fixed part above the basic support and feeding assembly and is used for realizing non-damage centering and synchronous uniform rotation of the carbon fiber bicycle front fork. A constant force follow-up grinding assembly is installed on the movable execution end of the basic support and feeding assembly and is coaxially arranged opposite the working area of the centering and clamping rotating assembly. Through cooperation of the centering and clamping rotating assembly and the constant force follow-up grinding assembly, non-damage clamping, micron-level centering, constant force polishing and error compensation are realized, traditional extensive machining is upgraded to a cooperative system, machining consistency, robustness and adaptability are greatly improved, operation and maintenance and artificial costs are reduced, and a revolutionary solution is provided for high-end carbon fiber product precision machining.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber component processing technology, specifically a carbon fiber bicycle front fork rotary surface grinding device. Background Technology

[0002] High-precision grinding of the rotating surface of carbon fiber bicycle forks is a core process that determines the assembly accuracy with the head tube bearing of the frame, steering smoothness, and overall bicycle performance. Its processing quality directly affects the safety and reliability of the product, riding experience, and brand value. With the development of bicycles towards lightweight and high performance, developing an integrated intelligent grinding device that can simultaneously solve multiple contradictions such as flexible anti-pinch, ultra-high centering accuracy, constant grinding pressure, and adaptive shape error has become a key technological requirement for breaking through the bottleneck of precision processing of carbon fiber composite materials and achieving industrial upgrading.

[0003] The core contradiction of existing carbon fiber fork rotary surface grinding devices lies in the systemic conflict between the inherent fragility and anisotropy of the carbon fiber material's layered structure, as well as shape errors such as workpiece roundness and straightness, and the requirements for high-precision and consistent processing. Traditional devices employ rigid positioning and program control, mechanically linking clamping, rotation, feeding, and grinding modules in series. Key process parameters are statically preset, making it impossible to achieve dynamic adaptation between structure and working conditions. This makes it difficult to balance workpiece protection, processing accuracy, and self-adaptability, resulting in four inherent defects: First, clamping accuracy and workpiece protection are difficult to balance, and clamping can easily cause irreversible damage; rigid clamps require large clamping forces to maintain accuracy, easily causing crushing, scratching, or delamination of the carbon fiber laminate structure; simple flexible buffers can alleviate crushing, but insufficient support rigidity leads to poor workpiece coaxiality and large rotational runout, failing to meet high-precision grinding requirements; second, grinding pressure control is rigid, resulting in poor surface quality consistency; existing devices mostly use servo rigid feed and fixed trajectory control, which cannot compensate for workpiece elastic deformation and micro-deformation. The pressure fluctuations caused by unevenness and clamping eccentricity can easily lead to over-grinding, resin ablation, under-grinding, and residual material, resulting in inconsistent machining accuracy and low yield. Furthermore, the lack of shape error adaptive capability results in insufficient machining robustness. Traditional devices rely on preset paths and ideal workpiece contours; when there are shape deviations in the fork, the grinding head cannot follow the actual contour in real time, easily leading to detachment, sudden pressure changes, or even machining interference, affecting quality and posing a risk of damage. Simultaneously, they are highly specialized, lack flexibility and intelligence, and have poor adaptability. Traditional equipment is mostly customized for a single model, requiring extensive fixture replacement and parameter adjustments for production changes. Moreover, the lack of real-time sensing and closed-loop adjustment, and heavy reliance on manual experience, makes it difficult to meet the continuous production needs of high-end carbon fiber parts. Therefore, there is an urgent need for an innovative integrated grinding device that unifies flexible, non-destructive clamping and high-precision centering, achieving constant force adaptive grinding and shape error compensation, improving structural versatility, environmental tolerance, and maintainability, and meeting the precision machining requirements of high-end carbon fiber forks and similar rotating parts.

[0004] Therefore, we propose a rotary surface grinding device for carbon fiber bicycle forks to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a rotary grinding device for carbon fiber bicycle forks. By coordinating a centering clamping and rotating component with a constant force follow-up grinding component, it achieves damage-free clamping, micron-level centering, constant force grinding, and error compensation. This upgrades traditional rough processing to a collaborative system, significantly improving processing consistency, robustness, and adaptability, reducing operation and maintenance costs and labor costs, and providing a disruptive solution for precision processing of high-end carbon fiber products.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a carbon fiber bicycle front fork rotary surface grinding device, comprising a base support and a feed assembly, which constitute the static frame and linear motion reference of the device;

[0007] A centering clamping rotating assembly is mounted on a fixed part above the base support and feed assembly to achieve damage-free centering and synchronous uniform rotation of the carbon fiber bicycle fork.

[0008] A constant force follower grinding assembly is installed on the movable actuator end of the base support and feed assembly, and is coaxially opposite to the working area of ​​the centering and clamping rotary assembly.

[0009] The centering clamping rotation assembly includes at least three sets of flexible gripper assemblies evenly distributed around the circumference, used to achieve three-point flexible adaptive clamping and high-precision centering of the workpiece.

[0010] The constant force follow-up grinding assembly includes a parallelogram linkage mechanism, an inclined constant force gas spring, and a grinding head. The fixed end of the parallelogram linkage mechanism is fixed to the movable execution end of the base support and the feed assembly, and the grinding head is mounted on the opposite movable end. The outer wall of the constant force gas spring is connected to the inclined bracket on the movable execution end of the base support and the feed assembly and the movable link of the parallelogram linkage mechanism through a hinge structure, which is used to drive the parallelogram linkage mechanism to swing and provide constant radial pressure to the grinding head.

[0011] Preferably, the base support and feed assembly includes a leveling cup, a base, a column, a crossbeam, a linear guide rail, and a slider; the base is provided with a leveling cup at its bottom; the column is vertically fixed to the base, and the crossbeam is fixedly connected to the top of the column; the linear guide rail is fixedly installed on the top of the base, and the slider is slidably disposed on the linear guide rail.

[0012] Preferably, the centering clamping rotation assembly includes a servo motor, a harmonic reducer, a shrinking sleeve, and an annular rotary table; the servo motor and the harmonic reducer are mounted on a crossbeam, and the output shaft of the servo motor is connected to the input shaft of the harmonic reducer; the output shaft of the harmonic reducer is connected to the annular rotary table through the shrinking sleeve; three sets of the flexible gripper assemblies are evenly distributed at 120 degrees on the annular rotary table.

[0013] Preferably, each set of flexible gripper assemblies includes a mounting base, a bidirectional flexible drive cylinder, a radial guide sleeve, a universal ball joint, and a composite flexible centering gripper; the mounting base is fixed to the lower surface of the annular rotary table; the bidirectional flexible drive cylinder is fixed to one side of the outer wall of the mounting base, and its piston rod is connected to the tail of the composite flexible centering gripper through the universal ball joint; the radial guide sleeve is fixed to the bottom of the mounting base and has a clearance fit with the guide section of the composite flexible centering gripper.

[0014] Preferably, one end of the working surface of the composite flexible centering gripper is provided with a gradually tapered groove; the composite flexible centering gripper adopts a composite structure with a flexible outer layer and a rigid inner layer.

[0015] Preferably, the constant force follower grinding assembly includes an inclined support, a U-shaped hinge seat, a constant force gas spring, a ball-head universal joint, a fixed rotating shaft seat, a movable rotating shaft seat, two upper connecting rods, two lower connecting rods, a high-frequency electric spindle, and a grinding head; the inclined support and the fixed rotating shaft seat are both fixed to the top of the slider; the cylinder end of the constant force gas spring is hinged to the inclined support through the U-shaped hinge seat; the fixed rotating shaft seat and the movable rotating shaft seat are hinged together through two upper connecting rods and two lower connecting rods to form a parallelogram mechanism; the piston rod end of the constant force gas spring is hinged to the outer wall of one of the lower connecting rods through the ball-head universal joint; the high-frequency electric spindle is fixed to the top of the movable rotating shaft seat, and its output shaft is connected to the grinding head.

[0016] Preferably, the axis of the constant force gas spring forms a 30-degree angle with the vertical direction; the constant force gas spring maintains a stable output force within its working stroke, which can continuously provide a constant radial grinding pressure to the grinding head, meeting the constant force grinding requirements of the rotating surface of the carbon fiber fork.

[0017] Preferably, in the parallelogram mechanism, the two upper connecting rods and the two lower connecting rods are of equal length and arranged in parallel; the movable pivot seat remains parallel to the fixed pivot seat during the swinging process of the parallelogram mechanism.

[0018] Preferably, the constant force follower grinding assembly further includes a dustproof protective cover, which is disposed outside the grinding head and the high-frequency electric spindle.

[0019] Preferably, the constant force follow-up grinding assembly further includes a dust removal nozzle and a cooling air nozzle, which are installed on the inner surface of the dustproof protective cover and point towards the contact area between the grinding head and the workpiece.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In this invention, through the principle innovation and deep synergy of the centering clamping rotating component and the constant force follow-up grinding component, the four major pain points of traditional carbon fiber fork grinding devices are fundamentally solved: damage upon clamping, contradiction between centering and flexibility, pressure fluctuation, and inability to adapt to shape errors. This achieves a closed-loop process, improves processing accuracy and efficiency, reduces maintenance costs, and adapts to the large-scale precision processing needs of high-end carbon fiber forks.

[0022] The centering and clamping rotary assembly breaks through the bottleneck of traditional discrete passive systems, with the following core benefits: First, it employs three sets of composite flexible grippers evenly distributed at 120 degrees, using a modified polyurethane outer layer and a carbon fiber inner layer combined with a gradient conical groove to prevent carbon fiber crushing and scratching, while ensuring clamping rigidity and anti-slip properties, thus resolving the contradiction between clamping accuracy and workpiece protection; second, the grippers are equipped with brass precision guide sleeves, combined with a ring base for precise indexing, ensuring centering and coaxiality, and solving the problems of reference drift and rotational runout; furthermore, it uses a harmonic reducer and a backlash-free transmission with a shrink sleeve to construct a high-rigidity rotational reference, avoiding grinding marks; simultaneously, the grippers are radially adjustable to adapt to different pipe diameters, achieving constant force clamping and solving the pain points of cumbersome changeovers and reliance on manual labor;

[0023] The constant force follow-up grinding assembly abandons complex electronic control and breaks through traditional bottlenecks through pure mechanical coupling: First, the parallelogram rigid frame ensures that the grinding posture is horizontal and without skew, solving the problem of uneven grinding accuracy; second, the constant force gas spring tilts and drives the single-sided connecting rod, converting the force into an effective component and solving the problems of traditional gas spring jamming and asynchronous double springs; and the U-shaped hinge and ball joint universal joint achieve angle self-adaptation, eliminating jamming and wear; at the same time, relying on the constant force characteristics of the gas spring, combined with the follow-up function, it achieves no fluctuation in grinding pressure, adapts to workpiece shape errors, solves the problems of over-grinding and under-grinding, and has fast response, high reliability, and simple maintenance.

[0024] In summary, this invention achieves non-destructive clamping, micron-level centering, constant-force grinding, and error compensation through the synergy of two major components. It elevates traditional rough processing to a collaborative system, significantly improving processing consistency, robustness, and adaptability, while reducing maintenance and labor costs, providing a disruptive solution for precision machining of high-end carbon fiber products. Attached Figure Description

[0025] Figure 1 This is a perspective view of the main structure of a carbon fiber bicycle front fork rotary surface grinding device according to the present invention.

[0026] Figure 2This is a schematic diagram of the installation position of the centering clamping rotating component in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0027] Figure 3 This is a schematic diagram of the installation positions of the servo motor, harmonic reducer, and expansion sleeve in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0028] Figure 4 This is a schematic diagram of the installation position structure of the composite flexible centering gripper and the gradient conical groove in the rotating surface grinding device for carbon fiber bicycle forks of the present invention.

[0029] Figure 5 This is a schematic diagram of the installation positions of the bidirectional flexible drive cylinder, radial guide sleeve, and universal ball joint in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0030] Figure 6 This is a schematic diagram of the installation position of the constant force follow-up grinding component in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0031] Figure 7 This is a schematic diagram of the installation positions of the slider, tilting bracket, and U-shaped hinge seat in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0032] Figure 8 This is a schematic diagram of the installation positions of the U-shaped hinge seat, constant force gas spring, and ball joint universal joint in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0033] Figure 9 This is a schematic diagram of the installation positions of the fixed pivot seat, upper connecting rod, lower connecting rod, and movable pivot seat in a carbon fiber bicycle front fork rotary surface grinding device of the present invention.

[0034] Figure 10 for Figure 9 Enlarged detail image of point A in the middle.

[0035] In the diagram: 100, leveling foot cup; 200, base; 300, column; 400, crossbeam; 500, centering clamping rotating assembly; 501, servo motor; 502, harmonic reducer; 503, expansion sleeve; 504, annular rotary table; 505, mounting base; 506, bidirectional flexible drive cylinder; 507, radial guide sleeve; 508, universal ball joint; 509, composite flexible centering gripper; 510, gradient conical groove; 6 00. Constant force follow-up grinding assembly; 601. Linear guide rail; 602. Slider; 603. Inclined bracket; 604. U-shaped hinge seat; 605. Constant force gas spring; 606. Ball joint universal joint; 607. Fixed spindle seat; 608. Upper connecting rod; 609. Lower connecting rod; 610. Movable spindle seat; 611. High frequency electric spindle; 612. Grinding head; 613. Dustproof protective cover; 614. Dust removal nozzle; 615. Cooling air nozzle. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 as well as Figure 6 As shown, this embodiment discloses a carbon fiber bicycle front fork rotary surface grinding device, including a base support and a feed assembly, which constitute the static frame and linear motion reference of the device.

[0038] In this embodiment of the invention, the structure serves to ensure that the base support and feed assembly achieve overall machine leveling through the leveling feet 100, ensuring a stable static foundation for the equipment during installation and operation; the base 200, column 300, and crossbeam 400 together form a rigid frame, providing solid support for the centering and clamping rotating assembly 500 and the constant force follow-up grinding assembly 600; the linear guide rail 601 and the slider 602 cooperate to form a precision linear feed system, which can realize the smooth movement of the grinding head 612 along the workpiece axis, providing precise motion trajectory control for full-length grinding of the rotating surface.

[0039] like Figure 1 As shown, the centering clamping rotating assembly 500 is mounted on the fixed part above the base support and feed assembly, and is used to achieve damage-free centering and synchronous uniform rotation of the carbon fiber bicycle fork.

[0040] In this embodiment of the invention, the structure functions as follows: the centering and clamping rotation assembly 500 adaptively clamps the workpiece using three sets of flexible gripper assemblies evenly distributed at 120 degrees, achieving micron-level centering while avoiding damage to the carbon fiber surface; wherein the servo motor 501 drives the harmonic reducer 502, which is transmitted to the annular rotary table 504 via the expansion sleeve 503, causing the workpiece to rotate at a uniform speed, providing a stable and non-jumping rotation reference for the grinding process, and ensuring the roundness and coaxiality of the grinding contour.

[0041] like Figure 1 As shown, the constant force follower grinding assembly 600 is installed on the movable actuator end of the base support and feed assembly, and is coaxially opposite to the working area of ​​the centering and clamping rotary assembly 500.

[0042] In this embodiment of the invention, the function of this structure is that the constant force follow-up grinding component 600 is mechanically coupled with the constant force gas spring 605 through the parallelogram linkage mechanism, so that the grinding head 612 can adaptively oscillate with the fluctuation of the workpiece surface shape while feeding along the workpiece axis, and always maintain a constant radial grinding pressure; this structure effectively avoids over-grinding or under-grinding caused by workpiece shape errors, and improves grinding consistency and surface quality.

[0043] like Figure 2 As shown, the centering clamping rotation assembly 500 includes at least three sets of flexible gripper assemblies evenly distributed in a circle, used to achieve three-point flexible adaptive clamping and high-precision centering of the workpiece.

[0044] In this embodiment of the invention, the structure functions as follows: the three-point layout conforms to the principle of statically determinate positioning, which can achieve high-precision centering of the workpiece without exceeding the constraints; the flexible gripper assembly, through the design of composite material and gradient conical groove 510, provides sufficient clamping force while dispersing contact stress, preventing the carbon fiber laminate structure from being damaged by pressure, and taking into account clamping rigidity, centering accuracy and workpiece protection.

[0045] like Figures 6-7 As shown, the constant force follower grinding assembly 600 includes a parallelogram linkage mechanism, an inclined constant force gas spring 605, and a grinding head 612. The fixed end of the parallelogram linkage mechanism is fixed to the base support and the movable actuator end of the feed assembly, and the grinding head 612 is mounted on the opposite movable end. The two ends of the constant force gas spring 605 are respectively connected to the inclined bracket 603 on the movable actuator end of the base support and the feed assembly and the movable link of the parallelogram linkage mechanism through a hinge structure, which is used to drive the parallelogram linkage mechanism to swing and provide constant radial pressure to the grinding head 612.

[0046] In this embodiment of the invention, the function of this structure is that the parallelogram mechanism ensures that the grinding head 612 maintains a constant posture during the swing process, avoiding uneven grinding caused by tilting; the tilted constant force gas spring 605 converts its output force into a stable torque acting on the connecting rod, which remains basically unchanged within the swing range of the mechanism, thereby providing continuous and stable radial pressure to the grinding head 612, realizing true constant force grinding, and adapting to the pressure-sensitive characteristics of grinding carbon fiber materials.

[0047] like Figure 1 as well as Figure 6 As shown, the base support and feed assembly includes a leveling cup 100, a base 200, a column 300, a crossbeam 400, a linear guide rail 601, and a slider 602; the base 200 is provided with a leveling cup 100 at its bottom; the column 300 is vertically fixed on the base 200, and the crossbeam 400 is fixedly connected to the top of the column 300; the linear guide rail 601 is fixedly installed on the top of the base 200, and the slider 602 is slidably disposed on the linear guide rail 601.

[0048] In this embodiment of the invention, the function of the structure is that the leveling feet 100 can adapt to different ground conditions, ensure the overall level of the equipment, and provide a benchmark for high-precision machining; the frame structure composed of the base 200, column 300 and crossbeam 400 has high rigidity and high stability, and can effectively isolate external vibration interference; the precision linear motion pair composed of linear guide rail 601 and slider 602 is driven by a motor, which can realize the precise and smooth feed of grinding head 612 along the workpiece axis, and control the grinding trajectory and machining allowance.

[0049] like Figure 3 As shown, the centering clamping rotation assembly 500 includes a servo motor 501, a harmonic reducer 502, a tension sleeve 503, and an annular rotary table 504; the servo motor 501 and the harmonic reducer 502 are mounted on the crossbeam 400, and the output shaft of the servo motor 501 is connected to the input shaft of the harmonic reducer 502; the output shaft of the harmonic reducer 502 is connected to the annular rotary table 504 through the tension sleeve 503; three sets of flexible gripper assemblies are evenly distributed at 120 degrees on the annular rotary table 504.

[0050] In this embodiment of the invention, the function of this structure is as follows: the servo motor 501 provides precise speed and torque control; the harmonic reducer 502 has the characteristics of high transmission accuracy and zero backlash, ensuring smooth and wobbly movement of the rotary table; the expansion sleeve 503 realizes keyless connection, transmits large torque and has good centering, further ensuring the accuracy of the rotation reference; the annular rotary table 504 serves as the mounting base for the gripper assembly, and its precision machining and indexing ensure the uniform position accuracy of the three sets of grippers, which is the basis for achieving high coaxiality centering.

[0051] like Figures 4-5As shown, each flexible gripper assembly includes a mounting base 505, a bidirectional flexible drive cylinder 506, a radial guide sleeve 507, a universal ball joint 508, and a composite flexible centering gripper 509. The mounting base 505 is fixed to the lower surface of the annular rotary table 504. The bidirectional flexible drive cylinder 506 is fixed to one side of the outer wall of the mounting base 505, and its piston rod is connected to the tail of the composite flexible centering gripper 509 through the universal ball joint 508. The radial guide sleeve 507 is fixed to the bottom of the mounting base 505 and has a clearance fit with the guide section of the composite flexible centering gripper 509.

[0052] In this embodiment of the invention, the structure functions as follows: the bidirectional flexible drive cylinder 506 can precisely control the clamping and releasing actions of the gripper, and its built-in buffer structure makes the action smooth and avoids impact; the universal ball joint 508 allows the gripper to have slight angle self-adaptation during the drive process, preventing jamming caused by installation errors; the radial guide sleeve 507 is made of wear-resistant materials such as brass, providing high-precision linear guidance for the composite flexible centering gripper 509, restricting its radial motion freedom, and ensuring that the gripper moves along the set trajectory, which is the key to achieving precise radial positioning.

[0053] like Figures 4-5 As shown, the composite flexible centering gripper 509 has a gradually tapered groove 510 on one end of its working surface; the composite flexible centering gripper 509 adopts a composite structure with a flexible outer layer and a rigid inner layer.

[0054] In this embodiment of the invention, the structure functions as follows: the gradient conical groove 510 increases the contact area with the workpiece tube wall and converts the concentrated load into a distributed load, effectively reducing the contact pressure and preventing indentation or scratches on the carbon fiber surface; the outer flexible material (e.g., modified polyurethane) provides cushioning and protection, while the inner rigid material (e.g., carbon fiber reinforced composite material) ensures the overall rigidity and shape stability of the gripper. The combination of the two achieves the unity of effective clamping force transmission and workpiece surface protection.

[0055] like Figures 8-9 As shown, the constant force follower grinding assembly 600 includes an inclined support 603, a U-shaped hinge seat 604, a constant force gas spring 605, a ball-head universal joint 606, a fixed rotating shaft seat 607, a movable rotating shaft seat 610, two upper connecting rods 608, two lower connecting rods 609, a high-frequency electric spindle 611, and a grinding head 612; the inclined support 603 and the fixed rotating shaft seat 607 are both fixed to the top of the slider 602; the cylinder end of the constant force gas spring 605 is hinged to the inclined support 603 through the U-shaped hinge seat 604; the fixed rotating shaft seat 607 and the movable rotating shaft seat 610 are hinged together through the two upper connecting rods 608 and the two lower connecting rods 609 to form a parallelogram mechanism; the piston rod end of the constant force gas spring 605 is hinged to the outer wall of one of the lower connecting rods 609 through the ball-head universal joint 606; as shown Figure 10As shown, the high-frequency electric spindle 611 is fixed to the top of the movable rotating shaft seat 610, and its output shaft is connected to the grinding head 612.

[0056] In this embodiment of the invention, the function of this structure is that the U-shaped hinge seat 604 and the ball-head universal hinge 606 constitute a multi-degree-of-freedom hinge system, allowing the constant force gas spring 605 to adapt to angle changes when driving the parallelogram mechanism to swing, eliminating additional bending moment, and ensuring smooth and unhindered movement of the mechanism; the high-frequency electric spindle 611 provides high-speed and high-precision grinding power; the entire constant force follower system converts the linear thrust of the constant force gas spring 605 into stable radial pressure on the grinding head 612, and through the follower characteristics of the parallelogram mechanism, ensures that the grinding pressure does not change with the fluctuation of the workpiece contour.

[0057] like Figure 7 As shown, the axis of the constant force gas spring 605 forms a 30-degree angle with the vertical direction; the constant force gas spring 605 maintains a stable output force within its working stroke and can continuously provide a constant radial grinding pressure for the grinding head 612, meeting the constant force grinding requirements of the rotating surface of the carbon fiber fork.

[0058] In this embodiment of the invention, the function of this structure is that the 30-degree tilt angle is mechanically optimized so that the output force of the constant force gas spring 605 can be effectively converted into the radial pressure required by the grinding head 612 under the transmission of the parallelogram mechanism, while taking into account the spatial layout and range of motion of the mechanism; the output force of the constant force gas spring 605 fluctuates very little within its working stroke, ensuring that the pressure acting on the workpiece surface remains constant from the start of contact to the entire grinding process, which is the fundamental guarantee for obtaining a uniform material removal rate and consistent surface finish.

[0059] like Figure 9 As shown, in the parallelogram mechanism, the two upper connecting rods 608 and the two lower connecting rods 609 are of equal length and arranged in parallel; the movable pivot seat 610 remains parallel to the fixed pivot seat 607 during the swinging process of the parallelogram mechanism.

[0060] In this embodiment of the invention, the function of this structure is that the design of parallel connecting rods of equal length ensures that when the mechanism swings, the movable pivot seat 610 (i.e., the grinding head mounting seat) always maintains a parallel posture with the fixed pivot seat 607. This means that the axial direction of the grinding head 612 will not deflect during the follow-up process and will always be perpendicular to the theoretical rotation axis of the workpiece, thereby ensuring the correctness of the grinding trajectory and the surface forming accuracy.

[0061] like Figure 10 As shown, the constant force follower grinding assembly 600 also includes a dustproof protective cover 613, which covers the outside of the grinding head 612 and the high-frequency electric spindle 611.

[0062] In this embodiment of the invention, the structure functions as follows: the dustproof protective cover 613 encloses the grinding area, effectively preventing the carbon fiber dust and resin particles generated during grinding from spreading outward, protecting other precision components of the equipment from contamination, and extending their service life; at the same time, it provides a sealed space for integrated dust removal and cooling functions, improving the working environment and meeting the requirements of clean production and occupational health.

[0063] like Figure 10 As shown, the constant force follower grinding assembly 600 also includes a dust removal nozzle 614 and a cooling air nozzle 615. The dust removal nozzle 614 and the cooling air nozzle 615 are installed on the inner surface of the dustproof protective cover 613 and point towards the contact area between the grinding head 612 and the workpiece.

[0064] In this embodiment of the invention, the structure functions as follows: the dust removal nozzle 614 is connected to an external negative pressure system to form a local negative pressure zone near the grinding point, which promptly removes the generated dust, maintains a clear view of the grinding area, and prevents secondary dust adhesion from affecting the surface quality; the cooling air nozzle 615 introduces clean compressed air or cold air to force-cool the grinding point, removes grinding heat, effectively prevents the carbon fiber resin matrix from being burned, softened, or damaged by thermal stress due to local overheating, and ensures the microscopic integrity of the processed surface.

[0065] In use, the carbon fiber bicycle fork workpiece is first placed under the centering clamping and rotating assembly 500, so that the rotating surface to be ground is coaxially aligned with the grinding head 612; then the control system is activated, and three sets of bidirectional flexible drive cylinders 506 move synchronously, pushing the composite flexible centering jaws 509 to move towards the center along the radial guide sleeve 507; the gradient conical groove 510 at the front end of the jaws gently contacts the outer circle of the workpiece, and under the action of the flexible outer layer, it adapts to the micro-shape of the workpiece, achieving damage-free clamping and automatically completing high-precision centering;

[0066] After the workpiece is clamped and centered, the servo motor 501 is started, which drives the annular rotary table 504 and the workpiece to rotate at a constant speed through the harmonic reducer 502 and the expansion sleeve 503; at the same time, the high-frequency electric spindle 611 is started, driving the grinding head 612 to rotate at high speed. The control slider 602 is fed smoothly along the axial direction of the linear guide rail 601, so that the constant force follow-up grinding assembly 600 is fed axially towards the workpiece;

[0067] During the feeding process, the constant force gas spring 605 drives the parallelogram mechanism through the U-shaped hinge seat 604 and the ball-head universal joint 606, causing the grinding head 612 mounted on the movable rotating shaft seat 610 to press against the rotating workpiece surface with constant pressure. If the workpiece has roundness or straightness errors, the parallelogram mechanism will automatically swing under the thrust of the constant force gas spring 605, causing the grinding head 612 to rise and fall accordingly, achieving follow-up grinding. During this process, due to the characteristics of the constant force gas spring 605, the grinding pressure remains constant, effectively avoiding over-grinding or under-grinding.

[0068] Dust removal nozzle 614 and cooling nozzle 615 operate continuously, respectively removing dust and cooling the grinding area to ensure process cleanliness and processing quality. After grinding the entire rotating surface length, the feed stops, the workpiece rotation stops, the grippers release, and the processed workpiece is removed. This device achieves full automation and high precision throughout the entire process from clamping, centering, rotation to constant force follow-up grinding through mechanical coordination, significantly improving the processing consistency, surface quality, and production efficiency of the carbon fiber fork rotating surface.

[0069] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for grinding the rotating surface of a carbon fiber bicycle fork, characterized in that, Including: The basic support and feed components constitute the static framework and linear motion reference of the device; A centering clamping rotating assembly (500) is mounted on a fixed part above the base support and feed assembly to achieve damage-free centering and synchronous uniform rotation of the carbon fiber bicycle fork. A constant force follower grinding assembly (600) is installed on the movable actuator end of the base support and feed assembly and is coaxially opposite to the working area of ​​the centering clamping rotary assembly (500). The centering clamping rotation assembly (500) includes at least three sets of flexible gripper assemblies evenly distributed around the circumference, used to achieve three-point flexible adaptive clamping and high-precision centering of the workpiece; The constant force follow-up grinding assembly (600) includes a parallelogram linkage mechanism, an inclined constant force gas spring (605), and a grinding head (612). The fixed end of the parallelogram linkage mechanism is fixed to the movable execution end of the base support and the feed assembly, and the grinding head (612) is installed on the opposite movable end. The outer wall of the constant force gas spring (605) is connected to the inclined bracket (603) on the movable execution end of the base support and the feed assembly and the movable link of the parallelogram linkage mechanism through a hinge structure, which is used to drive the parallelogram linkage mechanism to swing and provide constant radial pressure to the grinding head (612).

2. The carbon fiber bicycle fork rotary surface grinding device according to claim 1, characterized in that: The basic support and feed assembly includes a leveling cup (100), a base (200), a column (300), a crossbeam (400), a linear guide rail (601), and a slider (602); the base (200) is provided with a leveling cup (100) at its bottom; the column (300) is vertically fixed on the base (200), and the crossbeam (400) is fixedly connected to the top of the column (300); the linear guide rail (601) is fixedly installed on the top of the base (200), and the slider (602) is slidably disposed on the linear guide rail (601).

3. The carbon fiber bicycle fork rotary surface grinding device according to claim 2, characterized in that: The centering clamping rotation assembly (500) includes a servo motor (501), a harmonic reducer (502), a shrinking sleeve (503), and an annular rotary table (504); the servo motor (501) and the harmonic reducer (502) are mounted on a crossbeam (400), and the output shaft of the servo motor (501) is connected to the input shaft of the harmonic reducer (502); the output shaft of the harmonic reducer (502) is connected to the annular rotary table (504) through the shrinking sleeve (503); three sets of the flexible gripper assemblies are evenly distributed at 120 degrees on the annular rotary table (504).

4. The carbon fiber bicycle fork rotary surface grinding device according to claim 3, characterized in that: Each set of flexible gripper assemblies includes a mounting base (505), a bidirectional flexible drive cylinder (506), a radial guide sleeve (507), a universal ball joint (508), and a composite flexible centering gripper (509); the mounting base (505) is fixed to the lower surface of the annular rotary table (504); the bidirectional flexible drive cylinder (506) is fixed to one side of the outer wall of the mounting base (505), and its piston rod is connected to the tail of the composite flexible centering gripper (509) through the universal ball joint (508); the radial guide sleeve (507) is fixed to the bottom of the mounting base (505) and has a clearance fit with the guide section of the composite flexible centering gripper (509).

5. The carbon fiber bicycle fork rotary surface grinding device according to claim 4, characterized in that: The composite flexible centering gripper (509) has a gradient conical groove (510) on one end of its working surface; the composite flexible centering gripper (509) adopts a composite structure with a flexible outer layer and a rigid inner layer.

6. The carbon fiber bicycle fork rotary surface grinding device according to claim 2, characterized in that: The constant force follow-up grinding assembly (600) includes an inclined bracket (603), a U-shaped hinge seat (604), a constant force gas spring (605), a ball joint (606), a fixed rotating shaft seat (607), a movable rotating shaft seat (610), two upper connecting rods (608), two lower connecting rods (609), a high-frequency electric spindle (611), and a grinding head (612); the inclined bracket (603) and the fixed rotating shaft seat (607) are both fixed to the top of the slider (602); the cylinder end of the constant force gas spring (605) is open to... The U-shaped hinge seat (604) is hinged to the inclined bracket (603); the fixed rotating shaft seat (607) and the movable rotating shaft seat (610) are hinged to form a parallelogram mechanism through two upper connecting rods (608) and two lower connecting rods (609); the piston rod end of the constant force gas spring (605) is hinged to the outer wall of one of the lower connecting rods (609) through the ball head universal joint (606); the high frequency electric spindle (611) is fixed to the top of the movable rotating shaft seat (610), and its output shaft is connected to the grinding head (612).

7. The carbon fiber bicycle fork rotary surface grinding device according to claim 6, characterized in that: The axis of the constant force gas spring (605) forms a 30-degree angle with the vertical direction; the constant force gas spring (605) maintains a stable output force within its working stroke and can continuously provide a constant radial grinding pressure to the grinding head (612) to meet the constant force grinding requirements of the rotating surface of the carbon fiber fork.

8. A carbon fiber bicycle fork rotary surface grinding device according to claim 6, characterized in that: In the parallelogram mechanism, the two upper connecting rods (608) and the two lower connecting rods (609) are of equal length and arranged in parallel; the movable pivot (610) remains parallel to the fixed pivot (607) during the swinging process of the parallelogram mechanism.

9. A carbon fiber bicycle fork rotary surface grinding device according to claim 6, characterized in that: The constant force follow-up grinding assembly (600) also includes a dustproof protective cover (613), which covers the outside of the grinding head (612) and the high-frequency electric spindle (611).

10. A carbon fiber bicycle fork rotary surface grinding device according to claim 9, characterized in that: The constant force follow-up grinding assembly (600) also includes a dust removal nozzle (614) and a cooling nozzle (615), which are installed on the inner surface of the dustproof protective cover (613) and point towards the contact area between the grinding head (612) and the workpiece.

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