Fiber feeding structure and continuous fiber 3D printer

Abstract

The utility model relates to the technical field of 3D printing, and discloses a fiber feeding structure and a continuous fiber 3D printer, and the fiber feeding structure comprises a fixed part, an adjusting part and a rotating part. The fixing part is used for supporting the fiber disc; the adjusting part comprises a containing shell and a steel ball, a containing cavity is formed in the containing shell to contain the steel ball, and the containing shell is connected to one side of the fixing part; the rotating part is connected with the adjusting part and drives the adjusting part and the fixing part to rotate synchronously. The fiber disc is supported by the fixing part, dynamic balance is achieved by matching with rolling of the steel balls in the adjusting part in the channel, the rotating part synchronously drives the adjusting part and the fixing part to rotate, the steel balls automatically adjust the position to balance the tension when the tension of the fiber changes, and therefore breakage or excessive unfolding caused by uneven stress of the fiber is avoided; the device has the advantages of simple structure, low cost and capability of effectively maintaining stable fiber tension.

Description

Technical Field

[0001] This application belongs to the field of 3D printing technology, specifically relating to a fiber feeding structure and a continuous fiber 3D printer. Background Technology

[0002] During continuous fiber 3D printing, the tension of the fiber gradually increases during curing, which can cause the material tray to break or over-spread due to uneven stress, seriously affecting the printing process and quality.

[0003] In existing technologies, common tension control methods include spring tension adjustment systems and sensor-based electronic control systems. While spring systems are simple and low-cost, they have poor adaptability to high-strength fiber materials such as carbon fiber. Electronic control systems, on the other hand, monitor tension changes in real time using tension sensors and adjust motor speed accordingly. However, these systems are more complex, more expensive, and sensitive to environmental factors such as temperature, humidity, and dust. These external factors can affect the accuracy of the sensors, leading to untimely or inaccurate system feedback. Both of these tension control methods can negatively impact the stability of material delivery and print quality. Utility Model Content

[0004] To address the shortcomings of the prior art, this application provides a fiber feeding structure and a continuous fiber 3D printer, which have the advantages of simple structure, low cost and the ability to effectively maintain stable fiber tension.

[0005] The technical effects to be achieved in this application are realized through the following aspects:

[0006] In a first aspect, this application provides a fiber feeding structure, comprising:

[0007] Fixed components used to support the fiber tray;

[0008] An adjusting component includes a receiving shell and a plurality of steel balls. The receiving shell has a receiving cavity, and the steel balls are disposed within the receiving cavity. The receiving shell is connected to one side of the fixing component.

[0009] A rotating component, connected to the adjusting component, is used to drive the adjusting component and the fixed component to rotate synchronously.

[0010] In some implementations, the receiving shell includes a shell and a cover plate, the cover plate being disposed on one side of the shell, and the receiving cavity being an area enclosed between the cover plate and the shell.

[0011] In some implementations, the adjusting component further includes a limiting plate disposed in the receiving cavity and connected to the receiving shell. A channel is formed in the area between the limiting plate and the inner wall of the outer edge of the receiving shell. The channel is used to load the steel ball, and the width of the channel is such that only one steel ball can move at a time.

[0012] In some implementations, at least one limiting plate is provided.

[0013] In some implementations, the fixing component includes a fixing block and a plurality of ball-head plungers, with the plurality of ball-head plungers arranged in a ring array along the outer edge of the fixing block, and the fixing block being used to insert and support the fiber disc.

[0014] In some implementations, the fixing component further includes a positioning block, which has a positioning groove adapted to the fiber disc, and the positioning groove is used to be embedded in the fiber disc.

[0015] In some implementations, a monitoring component is also included, which monitors the rotational state of the fiber disc and provides real-time feedback.

[0016] In some implementations, the monitoring component includes a sensing plate and a photoelectric sensor. The sensing plate is driven to connect with the rotating component. The sensing plate, the fixing component, and the adjusting component rotate synchronously. The photoelectric sensor is located on one side of the sensing plate and is used to monitor the rotation state of the sensing plate and provide real-time feedback.

[0017] In some implementations, the sensing sheet has equally spaced notches.

[0018] Secondly, this application provides a continuous fiber 3D printer, including a fiber feeding structure, which adopts the aforementioned fiber feeding structure.

[0019] In summary, this application has at least the following advantages:

[0020] This application provides a fiber feeding structure and a continuous fiber 3D printer. The fiber disc is supported by a fixed component, and the steel balls in the adjusting component roll in the channel to achieve dynamic balance. The rotating component synchronously drives the adjusting component and the fixed component to rotate. When the fiber tension changes, the steel balls automatically adjust their positions to balance the tension, thereby avoiding fiber breakage or over-expansion caused by uneven force. It has the advantages of simple structure, low cost and effective maintenance of stable fiber tension. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the fiber feeding structure in Embodiment 1 of this application.

[0022] Figure 2This is a cross-sectional view of the fiber feeding structure in Embodiment 1 of this application.

[0023] Figure 3 This is a schematic diagram of the limiting plate shown in Embodiment 1 of this application.

[0024] Figure 4 This is a structural schematic diagram of the fixing component shown in Embodiment 1 of this application.

[0025] Figure 5 This is a schematic diagram of the fiber feeding structure in Embodiment 2 of this application.

[0026] Marked in the image:

[0027] 1. Fixing component, 11. Fixing block, 12. Ball plunger, 13. Positioning block, 131. Positioning groove; 2. Adjusting component, 21. Receiving shell, 211. Shell, 212. Cover plate, 22. Steel ball, 23. Receiving cavity, 24. Limiting plate; 3. Rotating component; 4. Monitoring component, 41. Sensing plate, 411. Notch, 42. Photoelectric sensor; 5. Fiber disc. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some embodiments of this application, not all embodiments.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0030] Example 1:

[0031] Please see the appendix Figures 1-2 The fiber feeding structure of this application includes a fixing component 1, an adjusting component 2, and a rotating component 3. The fixing component 1 is used to support the fiber disc 5; the adjusting component 2 includes a receiving shell 21 and steel balls 22, and a receiving cavity 23 is formed in the receiving shell 21 to accommodate the steel balls 22. The receiving shell 21 is connected to one side of the fixing component 1; the rotating component 3 is connected to the adjusting component 2 and drives the adjusting component 2 to rotate synchronously with the fixing component 1.

[0032] The fixed component 1 refers to a support structure with load-bearing function, which can be implemented by combining a metal block with a plug-in device to fix the position of the fiber disc 5 through physical contact. The adjusting component 2 refers to a mechanical component that achieves dynamic balance, which can be implemented by combining an annular cavity with a rolling element, using the displacement of the steel ball 22 within the cavity to change the system's center of gravity. The receiving shell 21 refers to a container that constrains the movement trajectory of the steel ball 22, which can be implemented by combining a split shell 211 with a cover plate 212 to form a sealed space, restricting the movement of the steel ball 22 to a specific channel. The rotating component 3 refers to the power unit that drives the system, which can be implemented by connecting a stepper motor or a drive shaft to ensure that the material disc and the adjusting component 2 rotate synchronously.

[0033] Specifically, when the fiber disc 5 is installed on the fixed component 1, the steel balls 22 are initially evenly distributed at the bottom of the receiving cavity 23. When the rotating component 3 drives the system to rotate and transport fibers, the steel balls 22 move along the receiving cavity 23 under the combined action of centrifugal force and gravity. When the fiber tension increases, causing an increase in the rotational resistance of the fiber disc 5, the steel balls 22 move in the opposite direction of rotation, generating a reverse torque to balance the tension through the shift of the center of gravity. When the tension decreases, the steel balls 22 return to the bottom of the cavity due to gravity, restoring the initial equilibrium state. The entire process is dynamically regulated through the autonomous flow of the steel balls 22, without the need for external control signals.

[0034] The fiber feeding structure in this embodiment achieves real-time adjustment directly through the physical coupling of steel balls 22 and rotational motion, utilizing mechanical energy conversion. This eliminates the inherent signal transmission links in electronic systems and effectively solves the problem of fiber breakage or loosening caused by sudden tension changes during fiber transport. The adaptive motion of the steel balls 22 keeps the center of gravity of the fiber disc 5 in a dynamic equilibrium state, ensuring that the fiber tension remains stable within a reasonable range. Furthermore, the mechanical adjustment method adopted in this technical solution avoids the risk of electronic components being affected by the environment, while simplifying the system structure and reducing manufacturing and maintenance costs.

[0035] In some embodiments, the housing 21 includes a housing 211 and a cover plate 212, the cover plate 212 being disposed over one side of the housing 211, and a housing cavity 23 being formed in the area enclosed between the cover plate 212 and the housing 211.

[0036] Among them, the shell 211 refers to a rigid base component with load-bearing function, which can be made of aluminum alloy material through machining to form an annular groove structure, and its outer contour is adapted to the installation space of the fiber feeding system.

[0037] The cover plate 212 is a closed component that mates with the housing 211. Specifically, it can be made of steel plate with a thickness of 1-3 mm, which is stamped and then fastened to the edge of the housing 211 with bolts. The cover plate 212 forms a planar contact with the end face of the housing 211.

[0038] Specifically, the housing 211 and the cover plate 212 adopt a split assembly structure. An annular positioning step is machined on the end face of the housing 211, and the cover plate 212 is connected to the housing 211 by multiple evenly distributed M4 hexagon socket screws. When the cover plate 212 is fastened, an annular channel with a width of 3.5 mm is formed between its inner edge and the side wall of the groove in the housing 211. The size of this channel is controlled by the superposition of the groove depth of the housing 211 and the thickness of the cover plate 212, ensuring that the steel balls 22 can only be arranged in a single layer. Driven by the rotating component 3, the steel balls 22 are distributed circumferentially in the channel under the action of centrifugal force, and the fiber tension is adjusted in real time by changing the distribution density. The split structure allows the cover plate 212 to be disassembled separately during maintenance, which is convenient for cleaning the surface of the steel balls 22 or replacing worn parts.

[0039] This embodiment utilizes a combination structure of a detachable cover plate 212 and a housing 211, allowing the channel width to be finely adjusted by changing the assembly position of the cover plate 212. For example, by adding a 0.1 mm thick adjusting shim between the cover plate 212 and the housing 211, the channel width can be precisely controlled at 3.6 mm. This adjustability effectively solves the problem of steel ball 22 jamming caused by machining errors in the casting cavity.

[0040] Through the above-mentioned configuration, modular assembly and precise dimensional control of the cavity 23 structure are achieved, ensuring the stability of the movement trajectory of the steel ball 22 within the channel. The rigid connection between the cover plate 212 and the housing 211 prevents the steel ball 22 from detaching due to cavity deformation after long-term use. The split structure design reduces the maintenance time for the steel ball 22 by approximately 60%, while the channel width adjustment function allows the equipment to accommodate different batches of steel balls 22 with a diameter tolerance of ±0.2 mm.

[0041] In some embodiments, please refer to the appendix Figure 3 The adjusting component 2 includes a limiting plate 24, which is disposed in the receiving cavity 23 and connected to the receiving shell 21. The area between the limiting plate 24 and the inner wall of the outer edge of the receiving shell 21 forms a channel for loading steel balls 22. The width of the channel is such that only one steel ball 22 can move at a time.

[0042] The limiting plate 24 refers to the plate-shaped structure set inside the receiving cavity 23. Specifically, it can be achieved by bolting an annular metal plate to the receiving shell 21. The gap between its outer contour and the inner wall of the receiving shell 21 forms the movement path of the steel ball 22.

[0043] The channel refers to the annular space formed by the outer edge of the limiting plate 24 and the inner wall of the receiving shell 21. Specifically, the difference between the diameter of the limiting plate 24 and the inner diameter of the receiving shell 21 can be adjusted to form the moving width of a single row of steel balls 22, so that the steel balls 22 can be arranged linearly in the channel.

[0044] Among them, the movement restriction of steel ball 22 means that the channel width is equal to 1.0-1.2 times the diameter of a single steel ball 22. Specifically, it can be achieved by precision machining the matching dimensions of the limiting plate 24 and the receiving shell 21, ensuring that the steel ball 22 can only roll in a single row along the channel.

[0045] Specifically, the limiting plate 24 is fixedly installed inside the receiving cavity 23, forming a continuous annular channel between its outer edge and the inner wall of the receiving shell 21. The width of this channel is strictly controlled to allow only a single steel ball 22 to pass through. The steel ball 22 rolls along the channel under the action of the rotating component 3. When the fiber tension changes, the steel ball 22 is displaced by centrifugal force within the channel. Due to the channel width constraint, the steel balls 22 cannot be stacked laterally or misaligned, but can only form a continuous rolling sequence in a single direction. This arrangement allows the rolling resistance of each steel ball 22 to be independently superimposed, transforming it into a uniform damping effect, thereby counteracting the fluctuations in fiber tension.

[0046] In this embodiment, a single-row channel is constructed by limiting plate 24, which forces the steel balls 22 to be arranged linearly, eliminating the interference caused by multi-directional movement, and transforming the movement of the group of steel balls 22 into a continuous and controllable mechanical response. This effectively prevents the steel balls 22 from getting stuck or local pressure concentration due to disordered movement, significantly improving the stability of tension regulation during fiber feeding and avoiding fiber breakage or over-spreading.

[0047] In some embodiments, at least one limiting plate 24 is provided.

[0048] The limiting plate 24 is a structural component used to separate the movement path of the steel ball 22 within the receiving cavity 23. Specifically, it can be achieved by maintaining a gap between the annular thin plate and the inner wall of the receiving shell 21, forming a channel of a specific width by fixing it inside the receiving shell 21. This structure solves the problem that a single channel cannot adapt to multiple working conditions by adjusting the number of limiting plates 24.

[0049] Specifically, when there is only one limiting plate 24, it forms a single annular channel with the inner wall of the outer edge of the receiving shell 21. The steel balls 22 are evenly distributed within the channel under the action of centrifugal force, achieving the basic tension adjustment function. When there are multiple limiting plates 24, the multiple limiting plates 24 form independent sub-channels with the inner wall of the receiving shell 21, or form a composite channel network through staggered layout. For example, two limiting plates 24 can form a double-layer annular channel, or three limiting plates 24 can form a hexagonal multi-channel structure. The movement path of the steel balls 22 in different channels can be flexibly selected according to the fiber tension change requirements, avoiding congestion or jamming of the steel balls 22 due to insufficient capacity of a single channel. At the same time, the channel width can be controlled by adjusting the spacing of the limiting plates 24 to ensure that the steel balls 22 can only move along the preset path.

[0050] By setting at least one limiting plate 24, the number of limiting plates 24 can be increased or decreased according to actual needs. For example, when dealing with high tension fluctuation scenarios, the limiting plates 24 can be increased to expand the channel capacity, or the limiting plates 24 can be reduced to simplify the structure when dealing with low tension scenarios, thereby improving the adaptability of the adjustment component 2.

[0051] This embodiment can form moving channels of steel balls 22 in different shapes by flexibly configuring the number of limiting plates 24, ensuring the uniform distribution of steel balls 22 during the feeding process of fiber materials of different specifications, avoiding the problem of tension adjustment failure caused by the single channel structure, and significantly improving the stability of the fiber conveying process.

[0052] In some embodiments, please refer to the appendix Figure 4 The fixing component 1 includes a fixing block 11 and a plurality of ball-head plungers 12. The plurality of ball-head plungers 12 are arranged in a ring array on the outer edge of the fixing block 11. The fixing block 11 is used to insert and support the fiber disc 5.

[0053] The fixing block 11 is a central support component used to support the fiber disc 5. It can be implemented as a cylindrical metal block with a shaft hole, whose outer diameter matches the central hole of the fiber disc 5 for insertion and positioning, thus providing basic support. The ball-head plunger 12 is a plunger-type clamping device with an elastic element. It can be implemented as a plunger structure with a built-in spring, and its end has a ball-head contact surface to apply a uniform clamping force to the outer edge of the fiber disc 5 through elastic contact. The annular array refers to multiple ball-head plungers 12 evenly distributed along the circumference, so that the clamping force is evenly transmitted to the circumferential edge of the fiber disc 5 through symmetrical arrangement.

[0054] Specifically, the fixing block 11, after being inserted into the central hole of the fiber disc 5, forms an axial positioning reference. The annular array of ball-head plungers 12 provides multi-point flexible support to the outer edge of the fiber disc 5 through elastic contact. When the fiber disc 5 deforms due to external tension, the ball-head contact surface can adaptively adjust the contact angle, absorbing local stress changes through elastic compression. The annular arrangement of support points disperses the dynamic load in the circumferential direction, avoiding single-point stress concentration that could lead to fiber breakage. The elastic clamping force allows for slight displacement while maintaining the radial constraint of the fiber disc 5, compensating for the jump deviation caused by inertia or vibration during rotation. The fixing block 11 and the ball-head plungers 12 form a synergistic structure of central rigid positioning and outer edge flexible clamping, balancing the dynamic force state of the fiber disc 5 during rotation through a graded support mechanism.

[0055] The ring-array ball plunger 12 structure achieves multi-dimensional dynamic force compensation without the need for additional sensors. The adaptive nature of the ball contact surface eliminates localized stress concentration while maintaining stable clamping. Compared to the single-point clamping method of spring systems, the ring-distributed elastic support points can synchronously respond to the deformation requirements of different positions on the fiber disc 5, significantly improving force balance.

[0056] Through the above technical solution, this embodiment effectively prevents fiber breakage caused by localized stress concentration in the fiber disc 5, while also avoiding fiber unfolding problems caused by excessive clamping. The synergistic effect of central rigid positioning and outer edge elastic support ensures that the fiber disc 5 maintains a stable feeding state during high-speed rotation, dynamically balancing the impact of external tension changes on the fiber disc 5 and improving the reliability of the continuous printing process.

[0057] In some embodiments, the fixing component 1 further includes a positioning block 13, which is provided with a positioning groove 131 adapted to the fiber disc 5, and the positioning groove 131 is used to be embedded in the fiber disc 5.

[0058] The positioning block 13 refers to a support component with a specific shape and structure, which can be made of metal or engineering plastic material. The positioning groove 131 on its surface forms a complementary interlocking relationship with the edge contour of the fiber disc 5. This structure can provide physical limiting constraints when the fiber disc 5 is installed.

[0059] The positioning block 13 can be formed by machining or injection molding. Its inner wall shape matches the geometric features of the outer edge of the fiber disc 5. The shape of the contact surface restricts the radial displacement freedom of the fiber disc 5, eliminating the positional deviation caused by the assembly gap.

[0060] Specifically, during installation, the fiber disc 5 is guided into the positioning groove 131. The geometric boundary of the positioning groove 131 forms surface contact with a portion of the structure of the fiber disc 5, preventing radial slippage or circumferential rotation of the fiber disc 5 during rotation. When external tension is applied to the fiber material, the positioning groove 131, through its shape constraint, counteracts torque changes caused by uneven force distribution, maintaining a stable coaxial state between the fiber disc 5 and the fixing block 11, thus avoiding fluctuations in material tensile strength caused by eccentric rotation.

[0061] In this embodiment, mechanical positioning is achieved through the geometric interlocking structure of the positioning groove 131, which reduces the impact of human assembly errors on positioning accuracy. At the same time, the positional stability of the fiber disc 5 can be maintained without relying on a complex electronic adjustment system.

[0062] With the above settings, the positioning block 13 can effectively suppress the axial offset and radial slippage of the fiber disc 5 during the feeding process, avoid the problem of excessive material unfolding or breakage caused by positioning deviation, ensure the straightness and tension uniformity of the fiber conveying path, and thus improve the reliability of the continuous printing process.

[0063] Example 2:

[0064] The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 5The fiber feeding structure in this embodiment also includes a monitoring component 4, which is used to monitor the rotation status of the fiber disc 5 and provide real-time feedback.

[0065] The monitoring component 4 refers to a device capable of capturing the dynamic changes of the fiber disc 5. Specifically, it can be implemented using a photoelectric sensor 42 in conjunction with a sensing plate 41 with a notch 411. The sensing plate 41 is driven and connected to the rotating component 3. By rotating synchronously, the photoelectric sensor 42 detects the passing frequency of the notch 411, thereby inferring the rotational speed and offset of the fiber disc 5. Real-time feedback refers to transmitting the monitoring data to the control system. This can be achieved through wired or wireless communication modules, such as using a digital signal processor to convert sensor signals into control commands.

[0066] Specifically, when the fiber disc 5 rotates abnormally due to uneven tension, the interval between the notch 411 of the sensing plate 41 and the photoelectric sensor 42 changes. The photoelectric sensor 42 converts the detected pulse signal into an electrical signal and transmits it to the control unit. The control unit determines whether the fiber disc 5 has speed fluctuations or positional deviations based on the signal changes, and then adjusts the drive parameters of the rotating component 3 or the distribution of the steel balls 22 in the adjustment component 2 to restore the fiber disc 5 to stable rotation. Through continuous monitoring and dynamic adjustment, fiber breakage or over-spreading due to force imbalance can be avoided.

[0067] The fiber feeding structure in this embodiment eliminates errors caused by indirect calculation by directly monitoring the rotation state of the fiber disc 5, while simplifying the complexity of sensor arrangement and reducing sensitivity to external factors such as temperature and humidity.

[0068] The above settings enable rapid identification of speed fluctuations and positional shifts during the rotation of the fiber disc 5, allowing for timely adjustments to the feeding mechanism to prevent fiber breakage or loosening due to sudden tension changes. Simultaneously, by reducing reliance on complex electronic control systems, the system's stability in harsh environments is improved, ensuring controllability of the material delivery process and printing quality.

[0069] In some embodiments, the monitoring component 4 includes a sensing plate 41 and a photoelectric sensor 42. The sensing plate 41 is driven to connect with the rotating component 3. The sensing plate 41, the fixing component 1, and the adjusting component 2 rotate synchronously. The photoelectric sensor 42 is located on one side of the sensing plate 41 and is used to monitor the rotation state of the sensing plate 41 and provide real-time feedback. The sensing plate 41 is provided with equally spaced notches 411.

[0070] The sensing element 41 refers to a sheet-like structure mechanically linked to the rotating component 3. Specifically, it can be implemented by cutting a thin sheet of metal or plastic into evenly spaced notches 411. These notches 411, in conjunction with the photoelectric sensor 42, generate pulse signals. The photoelectric sensor 42 is a detection device based on the photoelectric effect principle. Specifically, it can be implemented using an infrared transmitter and receiver in a through-beam structure. It detects changes in the position of the notches 411 of the sensing element 41 and converts these changes into electrical signals. Synchronous rotation refers to the coaxial rotation of the sensing element 41 with the fixed component 1 and the adjusting component 2 through a rigid connection. This can be achieved using a keyway fit or bolt fastening, eliminating the influence of transmission backlash on signal acquisition.

[0071] Specifically, the sensing element 41 is fixed to the output end of the rotating component 3 and rotates synchronously with the rotating component 3. During rotation, the notch 411 on the sensing element 41 periodically blocks or transmits the light beam of the photoelectric sensor 42, generating a pulse signal proportional to the rotational speed. Since the sensing element 41 is rigidly connected to the fixed component 1 and the adjusting component 2, the rotational state of the fiber disc 5 is directly reflected as the rotational displacement of the sensing element 41. The photoelectric sensor 42 captures this displacement information in a non-contact manner and converts it into an electrical signal, which is then transmitted to the control system in real time. The synchronous rotation mechanism avoids the errors introduced by transmission components such as gears and belts in traditional indirect measurements. At the same time, the non-contact detection method of the photoelectric sensor 42 reduces the risk of mechanical wear and sensitivity to environmental interference.

[0072] In this embodiment, by synchronously rotating the associated sensing plate 41 and the fiber disk 5, a direct correspondence between the photoelectric signal and the rotation state of the fiber disk 5 is established, simplifying the signal transmission link; the photoelectric sensor 42 does not need to physically contact the sensing plate 41, avoiding signal distortion caused by friction loss and dust contamination, and improving monitoring stability and anti-interference capability.

[0073] Through the above technical solution, this application can eliminate the signal drift caused by environmental factors in traditional tension sensors and accurately reflect the dynamic tension changes when the fiber disc 5 rotates; by combining non-contact photoelectric detection with synchronous rotation mechanism, the complexity of the system is reduced while achieving high-reliability monitoring, ensuring the real-time feedback accuracy of the rotation state during fiber conveying.

[0074] The equally spaced notches 411 refer to recessed structures distributed at the same interval along the edge of the sensing sheet 41. Specifically, they can be implemented using fan-shaped or rectangular grooves distributed at equal angles. The equally spaced notches 411 design provides a periodic signal trigger reference for the photoelectric sensor 42, preventing signal fluctuations caused by external environmental factors. The notches 411 also refer to the hollowed-out portions along the edge of the sensing sheet 41, which can be formed through laser cutting or stamping processes. The presence of the notches 411 allows the photoelectric sensor 42 to detect the rotation frequency of the rotating component 3 by observing the on / off state of the optical path. The uniformly distributed notches 411 ensure that a signal is triggered once every fixed angle, thereby improving the accuracy of rotational speed calculation.

[0075] Specifically, when the rotating component 3 drives the sensing plate 41 to rotate, the light beam emitted by the photoelectric sensor 42 periodically passes through the notch 411 or is blocked by the solid part of the sensing plate 41. The equally spaced notches 411 make the beam switching frequency linearly correlated with the rotation speed. The rotation speed can be calculated by counting the number of switching times per unit time. Because the notches 411 are evenly spaced, even if dust adheres or temperature and humidity changes cause light intensity fluctuations, it will not affect the statistical results of the switching times, thereby eliminating the impact of environmental interference on monitoring accuracy. The design of equally spaced notches 411 does not rely on complex signal filtering algorithms, but directly improves signal stability through mechanical structure, and reduces system complexity and environmental sensitivity.

[0076] The above technical solution solves the problem of untimely or inaccurate sensor feedback caused by environmental factors in the electronic control system. The design of equal intervals of the gaps 411 optimizes the signal acquisition method through mechanical structure, enabling the photoelectric sensor 42 to accurately monitor the rotation state of the fiber disc 5, avoiding misjudgment caused by external interference, thereby ensuring the stability of the fiber conveying process.

[0077] Example 3:

[0078] Based on the above embodiments, this embodiment provides a continuous fiber 3D printer, including a fiber feeding structure. The fiber feeding structure includes a fixing component 1, an adjusting component 2, and a rotating component 3. The fixing component 1 is used to support the fiber disk 5. The adjusting component 2 includes a receiving shell 21 and steel balls 22. The receiving shell 21 is provided with a receiving cavity 23. The steel balls 22 are located in the receiving cavity 23. The rotating component 3 is connected to the adjusting component 2 and drives it to rotate synchronously with the fixing component 1.

[0079] In this embodiment of the continuous fiber 3D printer, the fiber disc 5 is held in a ring by the ball-head plunger 12 of the fixing component 1 to ensure uniform force during rotation. The steel ball 22 of the adjusting component 2 rolls within the channel of the receiving cavity 23. When the fiber tension increases, the steel ball 22 moves outward under centrifugal force, increasing frictional resistance to slow the rotational speed of the fiber disc 5, thereby reducing the peak tension. The rotating component 3 is connected to the printer drive system via a coupling, synchronizing the rotational speed of the fiber disc 5 with the movement speed of the print head. If a monitoring component 4 is included, when the sensing plate 41 rotates with the rotating component 3, the photoelectric sensor 42 acquires real-time rotational speed data by detecting the position of the notch 411, and adjusts the output of the drive motor through closed-loop control to further optimize the tension balance.

[0080] Through the above technical solution, this application achieves adaptive tension adjustment during fiber transport, effectively preventing fiber breakage or excessive unfolding caused by sudden changes in curing tension. The multi-point clamping of the fixing component 1 and the mechanical buffering of the adjusting component 2 work together to ensure the rotational stability of the fiber disc 5, avoiding the jamming phenomenon caused by uneven force in traditional solutions. The closed-loop feedback of the monitoring component 4 further improves the accuracy of speed control, ensuring dynamic matching between fiber transport and printing speed, ultimately improving the printing quality.

[0081] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0082] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0083] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0084] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0085] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A fiber feeding structure, characterized in that, include: Fixing component (1) is used to support the fiber disc (5); Adjustment component (2) includes a receiving shell (21) and a plurality of steel balls (22), wherein the receiving shell (21) has a receiving cavity (23), the steel balls (22) are disposed in the receiving cavity (23), and the receiving shell (21) is connected to one side of the fixing component (1); and The rotating component (3) is connected to the adjusting component (2) and is used to drive the adjusting component (2) and the fixed component (1) to rotate synchronously.

2. The fiber feeding structure according to claim 1, characterized in that, The receiving shell (21) includes a shell (211) and a cover plate (212), the cover plate (212) covering one side of the shell (211), and the receiving cavity (23) is the area enclosed between the cover plate (212) and the shell (211).

3. The fiber feeding structure according to claim 1, characterized in that, The adjusting component (2) further includes a limiting plate (24), which is disposed in the receiving cavity (23) and connected to the receiving shell (21). A channel is formed in the area between the limiting plate (24) and the inner wall of the outer edge of the receiving shell (21). The channel is used to load the steel ball (22), and the width of the channel is such that only one steel ball (22) can move.

4. The fiber feeding structure according to claim 3, characterized in that, At least one limiting plate (24) shall be provided.

5. The fiber feeding structure according to claim 1, characterized in that, The fixing component (1) includes a fixing block (11) and a plurality of ball-head plungers (12). The plurality of ball-head plungers (12) are arranged in a ring array on the outer edge of the fixing block (11). The fixing block (11) is used to insert and support the fiber disc (5).

6. The fiber feeding structure according to claim 5, characterized in that, The fixing component (1) also includes a positioning block (13), which has a positioning groove (131) adapted to the fiber disc (5) and is used to be embedded in the fiber disc (5).

7. The fiber feeding structure according to any one of claims 1-6, characterized in that, It also includes a monitoring component (4), which is used to monitor the rotation status of the fiber disc (5) and provide real-time feedback.

8. The fiber feeding structure according to claim 7, characterized in that, The monitoring component (4) includes a sensing plate (41) and a photoelectric sensor (42). The sensing plate (41) is driven to connect with the rotating component (3). The sensing plate (41), the fixing component (1), and the adjusting component (2) rotate synchronously. The photoelectric sensor (42) is located on one side of the sensing plate (41) and is used to monitor the rotation state of the sensing plate (41) and provide real-time feedback.

9. The fiber feeding structure according to claim 8, characterized in that, The sensing sheet (41) has equally spaced notches (411).

10. A continuous fiber 3D printer, characterized in that, Includes a fiber feeding structure, which adopts the fiber feeding structure according to any one of claims 1-9.

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