A fiber feeding structure with adjustable damping function and a 3D printer

Abstract

This application relates to the field of 3D printing technology and discloses a feeding structure and 3D printer with adjustable damping function. It includes an adjusting component comprising a fixing component, an adjusting component, and a first magnet, the first magnet being connected to the lower end of the adjusting component, and the fixing component being movably connected to the adjusting component; a rotating component, drivenly connected to the fixing component; and a base comprising a seat and a second magnet. The second magnet is evenly embedded in the seat with its corresponding magnetic poles facing the first magnet, centered on the central axis of the rotating component. The adjusting component is configured to adjust the distance between the first and second magnets to control the rotational damping torque of the fixing component. This application achieves precise control of the damping torque through magnetic pole spacing adjustment, effectively avoiding fiber breakage and disc explosion, ensuring stable fiber output, and improving printing success rate.

Description

Technical Field

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

[0002] Continuous carbon fiber composite 3D printing technology has shown great application potential in aerospace, automotive manufacturing and other fields. Its core process consists of material system, nozzle system and digital control module. Current research focuses on short carbon fiber reinforced composites or continuous carbon fiber reinforced thermoplastic resin matrix composites. However, in the continuous fiber filament feeding stage, existing technologies still have significant bottlenecks.

[0003] Currently, the industry generally uses rotating shaft suspended feeders as feeding devices. However, when dealing with continuous fiber prepreg consumables with a wire diameter of only 0.4mm, traditional feeders cannot meet their special physical performance requirements. These consumables not only require a low-damping environment to avoid the "pulling" phenomenon caused by high friction, but also require the feeding system to have high rigidity to prevent fiber breakage.

[0004] However, in practical applications, when the fiber is under high damping, the friction between the fiber filament and the feed rack is too great, which can easily cause the fiber extruder to slip and make it impossible to feed the fiber stably. When the fiber is under low damping, the inertia of the feed tray is difficult to control, which can easily cause the "tray explosion" phenomenon, resulting in the filament tangling, breaking and clogging the nozzle, and thus causing printing failure. Utility Model Content

[0005] To address the shortcomings of the prior art, this application provides a feeding structure and 3D printer with adjustable damping function. By adjusting the magnetic pole spacing, the damping torque can be precisely controlled, effectively avoiding fiber breakage and disc explosion, ensuring stable fiber output, and improving the printing success rate.

[0006] The technical effects to be achieved in this application are realized through the following aspects:

[0007] In a first aspect, this application provides a fiber feeding structure with adjustable damping function, comprising:

[0008] An adjusting component includes a fixing member, an adjusting member, and a first magnet, wherein the first magnet is connected to the lower end of the adjusting member, and the fixing member is movably connected to the adjusting member;

[0009] The rotating component is driven to connect with the fixed component; and

[0010] The base includes a seat body and a second magnet. With the central axis of the rotating component as the center, the second magnet is evenly embedded in the seat body at intervals, and the same magnetic poles of the second magnet and the first magnet are opposite each other.

[0011] The adjusting member is configured to adjust the distance between the first magnet and the second magnet in order to control the rotational damping torque of the fixing member.

[0012] In some implementations, the adjusting element includes a threaded rod and a rotating block, the threaded rod being fixedly connected to the rotating block, and the rotating block being used to drive the threaded rod to rotate and rise.

[0013] In some implementations, the threaded rod is provided with a placement groove, and the first magnet is fixedly embedded in the placement groove.

[0014] In some implementations, the fixing member is provided with a movable groove and a threaded hole, the threaded hole passing through both ends of the movable groove; the threaded rod is connected to the threaded hole, and the rotating block is disposed in the movable groove.

[0015] In some implementations, the rotating component includes a rotating shaft; the base body has a through hole corresponding to the rotating shaft, the rotating shaft passes through the through hole, and is drivenly connected to the fixing member.

[0016] In some implementations, a detection component is also included, which includes a photoelectric detection switch and a sensing sheet. The photoelectric detection switch is fixedly connected to the base, and the transmitting end and the receiving end of the photoelectric detection switch are arranged opposite to each other to form a detection optical path.

[0017] The sensing element is connected to the fixing member, and the sensing surface of the sensing element is located in the detection optical path; the detection component is used to trigger the photoelectric detection switch to generate a detection signal when the sensing element rotates by blocking or reflecting the detection optical path.

[0018] In some implementations, a material tray and a tray placement component are also included, wherein the material tray and the tray placement component are detachably and fixedly connected.

[0019] In some implementations, the tray placement component includes a placement block and a chuck, the chuck being connected between the placement block and the fixing member; the material tray is fitted onto the placement block and is engaged with the chuck.

[0020] In some implementations, the surface of the placement block is provided with a plurality of evenly spaced ball-head plungers;

[0021] The chuck is provided with a slot, and the material tray is provided with a block corresponding to the slot, the block being embedded in the slot.

[0022] Secondly, this application provides a 3D printer, including a fiber feeding structure, which employs the fiber feeding structure with adjustable damping function as described above.

[0023] In summary, this application has at least the following advantages:

[0024] The fiber feeding structure and 3D printer with adjustable damping function provided in this application can adjust the damping by changing the magnetic repulsion force by adjusting the distance between the first magnet and the second magnet, thereby precisely controlling the damping torque of the rotating parts. This can avoid unstable fiber feeding caused by high friction and prevent inertial runaway under low damping conditions, effectively avoiding fiber breakage and disc explosion, ensuring stable fiber output and improving printing success rate. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the fiber feeding structure in Embodiment 1 of this application.

[0026] Figure 2 This is another schematic diagram of the fiber feeding structure in Embodiment 1 of this application.

[0027] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle.

[0028] Figure 4 This is a schematic diagram illustrating the structure of the through hole in Embodiment 1 of this application.

[0029] Figure 5 This is a schematic diagram of the fiber feeding structure in Embodiment 2 of this application.

[0030] Figure 6 This is a schematic diagram of the fiber feeding structure in Embodiment 3 of this application.

[0031] Figure 7 This is another structural schematic diagram of the fiber feeding structure in Embodiment 2 of this application.

[0032] Marked in the image:

[0033] 1. Adjusting component; 11. Fixing component; 111. Movable groove; 112. Threaded hole; 12. Adjusting component; 121. Threaded rod; 122. Rotating block; 123. Placement groove; 13. First magnet; 2. Rotating component; 3. Base; 31. Seat body; 311. Through hole; 32. Second magnet; 4. Detection component; 41. Photoelectric detection switch; 42. Sensing plate; 5. Material tray; 51. Clamping block; 6. Tray placement component; 61. Placement block; 611. Ball head plunger; 621. Clamping groove; 62. Chuck. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] Example 1:

[0037] Please see the appendix Figure 1-2 The fiber feeding structure with adjustable damping function of this application includes an adjusting component 1, a rotating component 2, and a base 3.

[0038] The adjusting component 1 includes a fixing component 11, an adjusting component 12, and a first magnet 13. The first magnet 13 is connected to the lower end of the adjusting component 12, and the fixing component 11 is movably connected to the adjusting component 12. The rotating component 2 is drivenly connected to the fixing component 11. The base 3 includes a seat body 31 and a second magnet 32. With the central axis of the rotating component 2 as the center, the second magnet 32 ​​is evenly embedded in the seat body 31 at intervals, and the same magnetic poles of the second magnet 32 ​​and the first magnet 13 are opposite each other. The adjusting component 12 is configured to adjust the distance between the first magnet 13 and the second magnet 32 ​​to control the rotational damping torque of the fixing component 11.

[0039] In this embodiment, the fiber feeding structure changes its distance from the first magnet 13 to the second magnet 32 ​​in the annular array within the base 3 when the adjusting member 12 moves the first magnet 13 axially. The repulsive force between the like magnetic poles decreases non-linearly with increasing distance, forming a modulated rotational resistance torque. This torque is transmitted to the rotating component 2 through the fixing member 11, producing a controllable braking effect when the feeding shaft rotates. The direction of the magnetic repulsive force is always perpendicular to the plane of rotation, avoiding axial component forces that could interfere with feeding stability. The symmetrically distributed annular magnetic poles ensure balanced torque in all directions during rotation, eliminating periodic fluctuations.

[0040] The above technical solution achieves stepless adjustment of the damping torque during fiber feeding. In a high-damping state, the distance between the first magnet 13 and the second magnet 32 ​​is increased, thereby reducing the magnetic repulsion and consequently reducing the friction between the fiber filament and the feed rack, preventing fiber extruder slippage and ensuring stable fiber delivery. In a low-damping state, the distance between the first magnet 13 and the second magnet 32 ​​is shortened, thereby increasing the magnetic repulsion and effectively suppressing the inertial rotation of the feed tray, preventing filament entanglement, breakage, and nozzle clogging, ensuring normal fiber output, and improving printing success rate.

[0041] In this structure, the non-contact damping formed by magnetic repulsion avoids energy loss caused by mechanical friction, ensuring long-term stability of damping control. This structure maintains appropriate tension for continuous fibers throughout the conveying process, resolving the technical contradiction between low friction and high rigidity inherent in traditional feeders, and ensuring stable fiber output.

[0042] In some embodiments, please refer to the appendix. Figure 3 The adjusting component 12 includes a threaded rod 121 and a rotating block 122. The threaded rod 121 is fixedly connected to the rotating block 122, and the rotating block 122 is used to drive the threaded rod 121 to rotate and rise. The rotating block 122 is a control component rigidly connected to the threaded rod 121, and can be made of plastic or metal with anti-slip texture. Its rotation directly drives the threaded rod 121 to rotate around its axis, thereby changing the vertical distance between the first magnet 13 and the second magnet 32.

[0043] Specifically, when a rotational torque is applied to the rotating block 122, the threaded rod 121 undergoes helical motion within the threaded hole 112 of the fixing member 11, and its axial position changes with the direction of rotation. Since the threaded rod 121 is rigidly connected to the first magnet 13, linear adjustment of the magnet spacing is achieved. Furthermore, the threaded drive has a self-locking characteristic, maintaining the current spacing state without external force, thus avoiding displacement deviations caused by vibration or inertia. The fixed connection between the rotating block 122 and the threaded rod 121 eliminates transmission gaps, ensuring the stability of torque transmission during adjustment, thereby precisely controlling the magnitude of the repulsive force between the magnetic poles.

[0044] By utilizing the mechanical transmission characteristics of the aforementioned threaded pair, rotational motion is converted into precise linear displacement. This allows for real-time adjustment of the magnetic pole spacing during continuous fiber feeding, thereby adjusting the rotational damping torque. This prevents extruder slippage caused by excessive fiber friction and also prevents fiber entanglement and breakage caused by uncontrolled inertia of the feed tray under low damping conditions, ensuring a stable and controllable feeding process.

[0045] In some embodiments, the threaded rod 121 is provided with a placement groove 123, and the first magnet 13 is fixedly embedded in the placement groove 123. The placement groove 123 refers to a recessed structure formed by machining the surface of the threaded rod 121, which can be achieved by milling or stamping. Its depth matches the thickness of the first magnet 13, and the bonding strength between the two can be enhanced by mechanical constraint or chemical bonding, specifically by interference fit or adhesive filling.

[0046] With the above configuration, the outline dimensions of the placement groove 123 perfectly match the shape of the first magnet 13, ensuring that the magnet cannot shift or rotate in the horizontal plane after being embedded. This guarantees the absolute stability of the position of the first magnet 13 under dynamic working conditions, ensures the linear change of the rotational damping torque, and avoids fiber breakage or extrusion slippage caused by magnetic pole spacing deviation or loss of control during fiber feeding. When the threaded rod 121 is driven by the rotating block 122 to move up and down, the first magnet 13 moves synchronously with the threaded rod 121, which can control the up and down movement of the first magnet 13 in a timely manner, thereby adjusting the damping force and ensuring the accuracy of the spacing adjustment between the first magnet 13 and the second magnet 32.

[0047] In some embodiments, the fixing member 11 is provided with a movable groove 111 and a threaded hole 112, the threaded hole 112 passing through both ends of the movable groove 111; the threaded rod 121 is connected to the threaded hole 112, and the rotating block 122 is disposed in the movable groove 111. This arrangement ensures that the through structure of the threaded hole 112 and the movable groove 111 keeps the threaded rod 121 coaxially aligned with the fixing member 11 during rotation and lifting, preventing misalignment between the first magnet 13 and the second magnet 32 ​​due to thread misalignment, and ensuring that the damping force changes linearly with the magnet spacing. The rotation of the rotating block 122 within the movable groove 111 directly translates into the size of the distance between the first magnet 13 and the second magnet 32. Mechanical limiting eliminates the influence of the rotating block 122's oscillation on the magnetic pole spacing, thereby ensuring the linear accuracy of the damping torque adjustment and ensuring that the magnet spacing adjustment process always proceeds along a predetermined trajectory, significantly improving adjustment stability.

[0048] In some embodiments, please refer to the appendix. Figure 4 The rotating component 2 includes a rotating shaft; the base 31 is provided with a through hole 311 corresponding to the rotating shaft, the rotating shaft passes through the through hole 311, and is drivenly connected to the fixing component 11.

[0049] Specifically, the rotating shaft is configured as a through hole 311 penetrating the base 3, with its axis coinciding with the center line of the through hole 311. This ensures that the rotating component 2 maintains axial stability during rotation, resulting in a more compact overall structure. Furthermore, a rigid transmission path is formed between the rotating shaft and the fixing member 11 via a mechanical connection. When the damping torque generated by the adjusting component 1 acts on the fixing member 11, this torque is directly transmitted to the rotating component 2 through the rotating shaft, forming a closed-loop control. This ensures the accuracy of the torque transmission path during damping adjustment and prevents fiber breakage or extrusion abnormalities caused by axial misalignment or loose connections during fiber feeding.

[0050] Example 2:

[0051] The difference between this embodiment and Embodiment 1 is that, please refer to... Figure 5 The fiber feeding structure of this embodiment also includes a detection component 4, which includes a photoelectric detection switch 41 and a sensing plate 42. The photoelectric detection switch 41 is fixedly connected to the base 31, and the transmitting end of the photoelectric detection switch 41 and its receiving end are arranged opposite to each other to form a detection optical path. The sensing plate 42 is connected to the fixing member 11, and the sensing surface of the sensing plate 42 is located in the detection optical path. The detection component 4 is used to trigger the photoelectric detection switch 41 to generate a detection signal when the sensing plate 42 rotates by blocking or reflecting the detection optical path.

[0052] Among them, the sensing sheet 42 refers to a thin sheet of metal or plastic with specific reflective or blocking characteristics. Specifically, it can be an aluminum sheet with a high reflective coating on its surface, and its edges are evenly spaced with sensing surfaces.

[0053] In this embodiment, the detection component 4 and the photoelectric detection switch 41 are fixed to the base 31, forming a stable detection optical path between the transmitting and receiving ends. The sensing plate 42 rotates synchronously with the fixing component 11, and its edge periodically passes through the detection optical path. When the sensing plate 42 blocks or reflects the light beam, the photoelectric detection switch 41 outputs a pulse signal. The frequency of the pulse signal directly reflects the rotational speed of the rotating component 2, and the angular velocity of the material tray can be calculated in real time by monitoring the pulse interval. During the printing process, the system compares the actual pulse frequency with the theoretical feeding speed. When an abnormal decrease in pulse frequency is detected, it is determined that the fiber has broken or the extruder has slipped; when an abnormal increase in pulse frequency is detected, it is determined that the material tray has lost inertial control, leading to the risk of tray explosion. At this time, the system automatically adjusts the magnet spacing to change the damping torque, forming a closed-loop control.

[0054] This solution, through real-time comparison of pulse signal frequency with theoretical values, can identify abnormal states where the rotational speed deviation exceeds 5% within 0.5 seconds. It achieves millisecond-level real-time monitoring of the motion state of rotating component 2, effectively identifying fiber breakage, entanglement, and inertial runaway of the material tray, and triggering an automatic adjustment mechanism. By linking the rotational speed data with the feeding control system, a closed-loop feedback adjustment mechanism is formed, maintaining a low-friction feeding environment while reducing the tray explosion rate to less than 10% of traditional structures. The accuracy rate of abnormal state identification reaches 98%, and the system response time is shortened to less than 0.3 seconds, significantly improving the stability and reliability of the continuous fiber 3D printing process.

[0055] Example 3:

[0056] The difference between this embodiment and Embodiment 2 is that, please refer to... Figures 6-7 The fiber feeding structure of this embodiment also includes a material tray 5 and a tray placement component 6, which are detachably and fixedly connected. The material tray 5 refers to a disc-shaped carrier that carries fiber consumables, and can be implemented as a disc structure with a central through hole 311.

[0057] In this embodiment, the fiber feeding structure features a material tray 5 rigidly connected to the tray placement component 6 via a snap-fit ​​structure. This connection allows the material tray 5 to withstand centrifugal force and torque during rotational feeding, preventing fiber feeding path deviation due to loosening. The elastic snap-fit ​​design of the tray placement component 6 enables the material tray 5 to be quickly locked during installation using axial pressure, and to be released during disassembly using reverse force, eliminating the need for auxiliary tools. This structure arranges multiple snap-fit ​​points around the circumference of the material tray 5, ensuring uniform load distribution and preventing connection failure caused by localized stress concentration.

[0058] The detachable snap-fit ​​structure enables rapid loading and unloading of the material tray 5, reducing the replacement time to the second level while ensuring connection rigidity, thus facilitating maintenance. Simultaneously, it effectively prevents axial movement and radial displacement of the material tray 5 under high-speed rotation, ensuring the stability of the fiber feeding path.

[0059] In some embodiments, the tray placement component 6 includes a placement block 61 and a chuck 62, with the chuck 62 connected between the placement block 61 and the fixing member 11; the material tray 5 is sleeved on the placement block 61 and engaged with the chuck 62. The surface of the placement block 61 is provided with a plurality of evenly spaced ball-head plungers 611; the chuck 62 is provided with a slot 621, and the material tray 5 is provided with a locking block 51 corresponding to the slot 621, the locking block 51 being embedded in the slot 621.

[0060] Among them, the placement block 61 refers to the rigid support structure that supports the material disk 5. Specifically, it can be implemented by a cylindrical metal block, whose outer diameter forms a clearance fit with the inner hole of the material disk 5 for quick positioning and installation.

[0061] The ball-head plunger 611 refers to a plunger structure with a spring-loaded spherical end. Specifically, it can be implemented using an elastic contact component that combines steel balls and springs. Radial pressure is generated through the elastic contact between the ball head and the inner wall of the material disk 5.

[0062] Specifically, when the material disk 5 is fitted into the placement block 61, its inner wall forms surface contact with the outer surface of the placement block 61. The spring compression of the ball plunger 611 is configured to generate a constant radial pressure, so that the inner wall of the material disk 5 is subjected to a uniformly distributed elastic constraint force, thereby suppressing the displacement caused by inertia during high-speed rotation. The embedded engagement of the locking block 51 and the locking groove 621 forms a mechanical limit. When the material disk 5 is subjected to rotational inertial force, the side wall of the locking block 51 contacts the side wall of the locking groove 621 to generate a reaction force, preventing the material disk 5 from moving. The circumferential uniform distribution of the ball plunger 611 ensures that the material disk 5 is subjected to balanced force in all directions, avoiding stress concentration in local areas that could cause the locking block 51 to disengage from the locking groove 621.

[0063] In some specific embodiments, the installation position of the ball plunger 611 is set to be phase-shifted from the distribution of the slots 621. For example, the ball plunger 611 is located in the middle area between two adjacent slots 621, thereby achieving a spatially complementary distribution of the constraint force. The opening width of the slot 621 can be slightly larger than the width of the locking block 51, for example, the gap between the two is controlled within the range of 0.1-0.3 mm, which ensures both smooth assembly and prevents excessive wobbling during rotation.

[0064] Through the above technical solution, this application can effectively suppress the offset and movement of the material disk 5 due to inertia during high-speed rotation, preventing disk breakage caused by loosening of the locking structure. The elastic contact ball plunger 611 continuously compensates for the dimensional tolerances of the material disk 5 caused by temperature changes or mechanical vibration, maintaining a stable radial constraint force; the mechanical interlocking structure of the slot 621 and the locking block 51 provides reliable limiting when the rotation direction changes abruptly, avoiding entanglement and breakage of the filament due to displacement of the material disk 5. The synergistic effect of the two constraint mechanisms ensures that the material disk 5 is always in a stable working state during the feeding process, ensuring stable fiber output.

[0065] Example 4:

[0066] Based on the above embodiments, this embodiment provides a 3D printer that adopts the fiber feeding structure with adjustable damping function as described above.

[0067] In this embodiment of the 3D printer, when the adjusting member 12 drives the first magnet 13 closer to the second magnet 32 ​​inside the base 3, the repulsive force between the like magnetic poles increases, resulting in a larger torque that hinders the rotation of the rotating component 2. When the adjusting member 12 drives the first magnet 13 away from the second magnet 32, the magnetic repulsive force weakens, thus reducing the rotational resistance. When the rotating component 2 drives the fixing member 11 to rotate, the annular magnet array inside the base 3 and the first magnet 13 in the adjusting member 1 form a circumferentially uniformly distributed repulsive field, avoiding torque fluctuations caused by local magnetic field strength differences. The coaxial connection design between the fixing member 11 and the rotating component 2 eliminates the interference of lateral forces on the fiber feeding path, ensuring stable delivery of the fiber filaments under low friction.

[0068] This application utilizes a non-contact magnetic repulsion adjustment mechanism to achieve linear control of damping torque without physical contact. This eliminates fiber breakage due to pulling under high damping conditions and prevents tray explosion caused by inertial runaway under low damping conditions. It achieves dynamic and precise adjustment of damping torque during continuous fiber feeding, effectively solving the problem of unstable fiber conveying caused by excessive friction. Simultaneously, magnetic braking suppresses tray inertial movement, preventing fiber entanglement and nozzle clogging. The uniform distribution of the magnetic repulsion field ensures the smooth operation of the rotating component 2, guaranteeing continuous and stable fiber output during printing, ensuring print quality, and effectively improving print success rate.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 with adjustable damping function, characterized in that, include: The adjusting component (1) includes a fixing member (11), an adjusting member (12), and a first magnet (13). The first magnet (13) is connected to the lower end of the adjusting member (12), and the fixing member (11) is movably connected to the adjusting member (12). The rotating component (2) is driven to connect with the fixed component (11); and The base (3) includes a seat body (31) and a second magnet (32). With the central axis of the rotating component (2) as the center, the second magnet (32) is evenly embedded in the seat body (31) at intervals, and the same magnetic poles of the second magnet (32) and the first magnet (13) are opposite to each other. The adjusting member (12) is configured to adjust the distance between the first magnet (13) and the second magnet (32) to control the rotational damping torque of the fixing member (11).

2. The fiber feeding structure with adjustable damping function according to claim 1, characterized in that, The adjusting component (12) includes a threaded rod (121) and a rotating block (122). The threaded rod (121) is fixedly connected to the rotating block (122), and the rotating block (122) is used to drive the threaded rod (121) to rotate and rise.

3. The fiber feeding structure with adjustable damping function according to claim 2, characterized in that, The threaded rod (121) is provided with a placement groove (123), and the first magnet (13) is fixedly embedded in the placement groove (123).

4. The fiber feeding structure with adjustable damping function according to claim 2, characterized in that, The fixing member (11) is provided with a movable groove (111) and a threaded hole (112), the threaded hole (112) passing through both ends of the movable groove (111); the threaded rod (121) is connected to the threaded hole (112), and the rotating block (122) is provided in the movable groove (111).

5. The fiber feeding structure with adjustable damping function according to claim 1, characterized in that, The rotating component (2) includes a rotating shaft; the base (31) is provided with a through hole (311) corresponding to the rotating shaft, the rotating shaft passes through the through hole (311) and is driven to connect with the fixing member (11).

6. The fiber feeding structure with adjustable damping function according to any one of claims 1-5, characterized in that, It also includes a detection component (4), which includes a photoelectric detection switch (41) and a sensing sheet (42). The photoelectric detection switch (41) is fixedly connected to the base (31), and the transmitting end of the photoelectric detection switch (41) and its receiving end are arranged opposite to each other to form a detection optical path. The sensing sheet (42) is connected to the fixing member (11), and the sensing surface of the sensing sheet (42) is located in the detection optical path; the detection component (4) is used to trigger the photoelectric detection switch (41) to generate a detection signal when the sensing sheet (42) rotates by blocking or reflecting the detection optical path.

7. The fiber feeding structure with adjustable damping function according to any one of claims 1-5, characterized in that, It also includes a material tray (5) and a tray placement component (6), wherein the material tray (5) and the tray placement component (6) are detachably and fixedly connected.

8. The fiber feeding structure with adjustable damping function according to claim 7, characterized in that, The tray placement component (6) includes a placement block (61) and a chuck (62), the chuck (62) being connected between the placement block (61) and the fixing member (11); the material tray (5) is fitted onto the placement block (61) and is engaged with the chuck (62).

9. The fiber feeding structure with adjustable damping function according to claim 8, characterized in that, The surface of the placement block (61) is provided with a plurality of evenly spaced ball-head plungers (611). The chuck (62) is provided with a slot (621), and the material tray (5) is provided with a block (51) corresponding to the slot (621). The block (51) is embedded in the slot (621).

10. 3D printer, characterized in that, Includes a fiber feeding structure, employing a fiber feeding structure with adjustable damping function as described in any one of claims 1-9.

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