Rewinding tray support, rewinding tray device and 3D printer

Abstract

The utility model discloses a rewinding tray support, a rewinding tray device and a 3D printer. The rewinding tray support is used for erecting a wire tray and comprises a base, a rewinding core and an elastic part, the base is fixedly arranged, the rewinding core is installed on the base and can rotate relative to the base, the elastic part is installed between the base and the rewinding core, and when the rewinding core rotates from a first position to a second position, the elastic part is fixed to the rewinding core. The rewinding core can be automatically reset to the first position through restoring force provided by the elastic piece. The rewinding tray device comprises a wire tray and a rewinding tray support, the friction portion of the rewinding core makes contact with the inner ring of the wire tray, and when the friction force between the wire tray and the friction portion is larger than the restoring force of the elastic piece, the wire tray and the rewinding core can reset together. The wire disc can be rewound by a certain angle along with the rewinding core during wire unwinding, the wire is tensioned, and winding of the wire is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a rewinding tray bracket for a 3D printer, a rewinding tray device and a 3D printer. Background Art

[0002] FDM (fused deposition modeling) 3D printers heat the print head at high temperature to melt the printing filament and deposit it onto the printing platform. When the molten filament contacts the printing platform, it cools and quickly solidifies. The print head deposits the filament layer by layer onto the printing platform along a set printing path, thereby constructing a model with a three-dimensional structure.

[0003] Typically, filament is wound into a coil on a filament reel for easier handling. 3D printers typically have a rewind tray support to hold the reel. However, most rewind tray supports only serve to suspend the reel. This can cause the filament to become fluffy during unwinding or when the reel is fully wound, making it prone to tangling. Summary of the Invention

[0004] In order to solve the above technical problems, the utility model provides a rewinding material tray bracket, a rewinding material tray device and a 3D printer, which can rewind the wire material tray to a certain extent and reduce the entanglement of the wire material.

[0005] The utility model adopts the following technical solutions:

[0006] In the first aspect, the present application provides a rewinding material tray bracket for setting up a wire material tray, comprising a base, a rewinding core, and an elastic member. The base is fixed, the rewinding core is installed on the base, the rewinding core is rotatable relative to the base, and the elastic member is installed between the base and the rewinding core. When the rewinding core rotates from a first position to a second position, the rewinding core can automatically reset to the first position through the restoring force provided by the elastic member.

[0007] Preferably, the rewinding core includes a rewinding portion and a rotating arm, the rewinding portion is arc-shaped, one end of the rotating arm is connected to the rewinding portion, and the rotating arm is rotatably installed on the base; the first protruding surface of the rewinding portion is provided with a friction portion, and the friction portion protrudes outward and is higher than the first surface of the rewinding portion.

[0008] Preferably, the base is provided with an opening portion for allowing the rewind core to pass through the surface of the base, and the opening portion has a sufficient size to enable the rewind core to rotate back and forth between the first position and the second position; the rewind material tray bracket includes a rotating shaft, which passes through the rotating arm and is fixed to both ends of the opening portion.

[0009] Preferably, the elastic member is sleeved on the rotating shaft, one end of the elastic member is fixed in the base, and the other end of the elastic member is movably abutted against the rotating arm.

[0010] Preferably, the base has a plurality of claws, the claws are cantilever structures, each claw is provided with more than two inclined surfaces or arc surfaces, and the maximum distance between two adjacent claws along the radial direction of the base is greater than the inner ring diameter of the wire disc.

[0011] Preferably, an elastic part is provided at the end of the rotating arm away from the base, and the elastic part includes an elastic protrusion, and the protrusion is arranged on a connecting bridge, and the connecting bridge is connected to the rotating arm. The protrusion and the outer surface of the friction part form a cylindrical surface, and the diameter of the cylindrical surface is greater than or equal to the inner ring diameter of the wire disc.

[0012] Preferably, an elastic portion is provided at one end of the rotating arm away from the base, and the elastic portion includes a spring and a protrusion. One end of the spring abuts against the rotating arm, and the other end of the spring abuts against the protrusion. The surface of the rotating arm away from the base has an opening, and the protrusion partially or completely protrudes from the opening.

[0013] In the second aspect, the present application provides a rewinding material tray device, comprising a wire tray and a rewinding material tray bracket, wherein the wire tray is mounted on the rewinding material tray bracket, and the rewinding material tray bracket is the aforementioned rewinding material tray bracket, and the wire feeding direction of the wire tray is consistent with the direction in which the rewinding core rotates from the first position to the second position.

[0014] The clamping claw clamps the wire disc in the axial direction, and the friction part contacts the inner ring of the wire disc. When the friction force between the wire disc and the friction part is greater than the restoring force of the elastic member, the wire disc can be reset together with the rewinding core.

[0015] In a third aspect, the present application provides a 3D printer, comprising a frame and a rewinding tray device, wherein the rewinding tray device is the aforementioned rewinding tray device, and the rewinding tray bracket is fixed to the frame.

[0016] Compared with the prior art, the present invention has the following advantages: when the rewinding material disc bracket sets up the wire disc, the wire disc rotates when the wire is fed in, and the friction between the wire disc and the rewinding material disc bracket drives the rewinding core to rotate and compresses the elastic part; when the wire is withdrawn, the elastic part rebounds, driving the rewinding core to rewind and reset. When the friction between the wire disc and the friction part is greater than the restoring force of the elastic part, the wire disc rewinds a certain angle with the rewinding core, tensioning the wire and avoiding entanglement of the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a 3D printer of the present application;

[0018] Figure 2 for Figure 1 The schematic diagram of the structure of the rewinding tray bracket fixed to the 3D printer is shown;

[0019] Figure 3 This is a schematic structural diagram of an embodiment of a rewinding tray device of the present application;

[0020] Figure 4 This is a structural diagram of an embodiment of the rewinding tray support of the present application; the rewinding core is in the first position;

[0021] Figure 5 for Figure 4 The structural diagram of the rewinding core, rotating shaft and elastic member shown;

[0022] Figure 6 for Figure 4 The bottom structure diagram of the rewinding tray support is shown;

[0023] Figure 7 for Figure 4 A schematic structural diagram of the base shown;

[0024] Figure 8 This is a structural schematic diagram of the rewinding core of the rewinding tray support of the present application in the second position;

[0025] Figure 9 for Figure 8 The structural diagram of the rewinding core, rotating shaft and elastic member shown;

[0026] Figure 10 A schematic structural diagram of an embodiment of the elastic portion of the rotating arm of the present application;

[0027] Figure 11 Schematic diagram of the structure of another embodiment of the elastic portion of the rotating arm of the present application.

[0028] In the figure, 10-rewinding material tray bracket, 1-base, 11-opening, 12-claw, 121-inclined surface, 13-fixed groove, 2-rewinding core, 21-rewinding portion, 211-first surface, 212-second surface, 22-rotating arm, 221-through hole, 222-stopper, 223-bump, 224-hollow portion, 225-connecting bridge, 226-spring, 227-protrusion, 228-support column, 229-opening, 3-elastic member, 31-fixed end, 32-movable end, 4-rotating shaft, 20-filament tray, 30-rewinding material tray device, 100-3D printer. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] like Figure 4-Figure 9 FIG. 1 shows an embodiment of a rewinding material tray support 1 of the present application. The rewinding material tray support 10 is used to support a wire reel 20 and includes a base 1, a rewinding core 2, and an elastic member 3. The base 1 is fixed, the rewinding core 2 is mounted on the base 1, and the rewinding core 2 is rotatable relative to the base 1. The elastic member 3 is mounted between the base 1 and the rewinding core 2. When the rewinding core 2 rotates from a first position to a second position, the rewinding core 2 can automatically return to the first position due to the rebound force provided by the elastic member 3.

[0033] In the specific implementation process, Figure 1 、 2 As shown, the base 1 can be fixed to the frame 5 of the 3D printer 100, or it can be fixed to a fixed base located outside the 3D printer 100. The base 1 is provided with an opening 11 for allowing the rewind core 2 to pass through the surface of the base 1. The opening 11 is of sufficient size to allow the rewind core 2 to rotate back and forth between the first position and the second position.

[0034] Each of the four corners of the base 1 is provided with a claw 12, and the claw 12 is a cantilever structure, and each claw 12 is provided with more than two inclined surfaces 121 or arc surfaces. The maximum distance H between two adjacent claws 11 along the radial direction of the base 1 is greater than the inner ring diameter D of the wire disc 2. During installation and removal, the inner ring of the wire disc 20 contacts the inclined surface 121 or the arc surface, and the claw 12 elastically contracts, causing the wire disc 20 to be clamped in or out, and rebounds after the wire disc 20 is clamped in or out. When the wire disc 20 is clamped in the rewinding disc bracket 10, the claw 12 can limit the transmission range of the wire disc 20, and is used to clamp the wire disc 20 in the axial direction to prevent it from falling off.

[0035] Specifically, the rewinding core 2 includes an arc-shaped rewinding portion 21 and a rotating arm 22 connected to the rewinding portion 21. The first surface 211 protruding outward of the rewinding portion 21 is provided with a friction portion 23. The friction portion 23 is preferably arranged at both ends of the first surface 211 arranged along the axial direction, and the friction portion 23 contacts the inner ring of the wire disc 20. The friction portion 23 is supported by wear-resistant materials, and the number is not limited, and multiple portions can be provided. The friction portion 23 protrudes outward and is higher than the first surface 211 of the rewinding portion 21. It preferentially contacts the inner ring of the wire disc 20 to ensure stable friction. The friction portion 23 can be provided as a detachable structure to facilitate replacement of a new friction portion 23 when worn.

[0036] The rewind core 2 is rotatable relative to the base 1, preferably via a rotating shaft 4. A through hole 221 is provided in the center of the rotating arm 22. After the rotating shaft 4 passes through the through hole 221, the ends of the rotating shaft 4 are fixed in the fixing grooves 13 of the base 1. The fixing grooves 13 are located at both ends of the opening 11 and are used to secure the rotating shaft 4.

[0037] The elastic member 3 is sleeved around the rotating shaft 4 and mounted between the base 1 and the rewind core 2. Specifically, the elastic member 3 may be a torsion spring, with its fixed end 31 secured within the base. For example, a fixing hole 31 through which only one end of the torsion spring passes may be provided in the base 1. The movable end 32 of the elastic member 3 abuts below a stopper 222 of the rotating arm 22, which is positioned above the through-hole 221. The number of elastic members 3 is not limited and may be one, as in this embodiment, or two, arranged symmetrically.

[0038] One end of the rotating arm 22 is connected to the second surface 212 of the rewinding portion 21, and the second surface 212 is arranged opposite the first surface 211. The other end of the rotating arm 22 away from the rewinding portion 21 is provided with an elastic portion, which can be of any form and is used to provide a certain amount of elasticity to adapt to wire discs with different inner diameters.

[0039] In this embodiment, the elastic part structure is as follows Figure 10As shown, the device includes a protrusion 223 made of an elastic material and mounted on a connecting bridge 225 connected to the rotating arm 22. The elastic portion also has a hollow portion 224, with both sides of the protrusion 223 having hollow portions 224. The protrusion 223 and the outer surface of the friction portion 23 form a cylindrical surface, the axis of which is the axis of the rotating shaft 4. The diameter of this cylindrical surface is preferably greater than or equal to the inner diameter D of the filament disc 20. When the filament disc 20 is inserted, the protrusion 223 compresses, generating a rebound force between the filament disc 20 and the friction portion 23, ensuring that the friction force is consistently greater than the restoring force of the elastic member 3. In this case, the filament disc 20 can be reset together with the rewind core 2, achieving a rewinding effect. The friction portion 23 is used to increase friction, and the design of the elastic portion ensures that the pressure between the filament disc 20 and the friction portion 23 can consistently drive the rewind core 2 to rotate. The rotating arm 22 is only provided with an elastic part at the end, and has a certain rigidity as a whole, so that when the protrusion 223 is compressed to a large stroke, the rebound force generated will not be very large, thereby avoiding the need to overcome too much friction after the wire disc 20 is separated from the rewinding core 2.

[0040] like Figure 3 As shown, a rewinding material tray device 30 includes a wire tray 20 and a rewinding material tray bracket 10. The wire tray bracket 20 is mounted on the rewinding material tray bracket 10. The rewinding material tray bracket 10 is the aforementioned rewinding material tray bracket 10. The wire feeding direction of the wire tray 20 is consistent with the direction (rotation direction) in which the rewinding core 2 rotates from a first position to a second position. The claw 12 axially clamps the wire tray 20, and the friction portion 23 contacts the inner ring of the wire tray 20. When the friction between the wire tray 20 and the friction portion 23 is greater than the restoring force of the elastic member 3, the wire tray 20 can be reset together with the rewinding core 2.

[0041] like Figure 1 、 Figure 2 As shown, an embodiment of a 3D printer 100 includes the aforementioned rewind tray device 30 and a frame 5. As previously described, the rewind tray device 30 comprises a rewind tray bracket 10 fixedly mounted on the frame 5. A filament tray 20 is inserted into the rewind tray bracket 1, and a clamping claw 12 restrains the filament tray 20. During installation, the filament feed direction must align with the rotation direction of the rewind core 2 from the first position to the second position.

[0042] When the rewind core 2 is located at Figure 4 In the first position shown in FIG. 1 , the elastic member 3 is not compressed. When the filament on the filament tray 20 begins to be fed into the nozzle (not shown in the figure) of the 3D printer 100, the rewind core 2 is pulled from the first position to the position shown in FIG. Figure 8In the second position shown, the elastic member 3 is compressed, and the restoring force of the elastic member 3 is accumulated, driving the rewinding core 2 to return from the second position to the first position (rewinding direction). Since the friction between the wire disc 20 and the friction portion 23 of the rewinding core 2 is greater than the restoring force of the elastic member 3, the wire disc 20 can be reset to the first position together with the rewinding core 2, which has a certain effect of rewinding the wire and reducing the knotting of the wire.

[0043] As another embodiment, the diameter of the cylindrical surface formed by the protrusion 223 and the outer surface of the friction part 23 can also be smaller than the inner ring diameter of the wire disc 20. In this case, the total gravity of the wire disc 20 and the wire wound on the wire disc 20 generates friction between the friction part 23, so that the friction force is greater than the restoring force of the elastic part 3. At this time, the wire disc 20 has the same rewinding effect as the previous embodiment; as the wire is consumed, the total gravity becomes smaller, and the friction force generated is less than the restoring force of the elastic part 3, and there is no rewinding effect at this time. However, as the wire is consumed, the wire winding diameter is smaller than the outer ring diameter of the wire disc 20. The wire is fluffy but not easy to run out of the wire disc, so it is not easy to get tangled.

[0044] See also Figure 11 , which is another embodiment of the elastic portion of the present application, comprises a spring 226 and a protrusion 227. One end of the spring 226 abuts against the rotating arm 22. A support column 228 is provided at the end of the rotating arm 22 away from the rewinding portion 21. The spring 226 is partially sheathed within the support column 228, and the other end of the spring 22 abuts against the protrusion 227. The surface of the rotating arm 22 away from the base 1 has an opening 229, and the protrusion 227 partially or completely protrudes from the opening 229. When matching different filament reels, the spring 22 can be appropriately compressed to adjust the degree to which the protrusion 227 is located outside the opening 229 to accommodate filament reels with different inner diameters.

[0045] The above are only preferred embodiments of the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims. Several improvements and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall also be regarded as the scope of protection of the present invention.

Claims

1. A rewinding material tray support for setting up a wire material tray, characterized by: It includes a base, a rewind core, and an elastic member. The base is fixed, the rewind core is installed on the base, the rewind core is rotatable relative to the base, and the elastic member is installed between the base and the rewind core. When the rewind core rotates from a first position to a second position, the rewind core can automatically reset to the first position through the restoring force provided by the elastic member.

2. The rewinding tray support according to claim 1, wherein: The rewinding core includes a rewinding portion and a rotating arm, the rewinding portion is arc-shaped, one end of the rotating arm is connected to the rewinding portion, and the rotating arm is rotatably installed on the base; the first protruding surface of the rewinding portion is provided with a friction portion, and the friction portion protrudes outward and is higher than the first surface of the rewinding portion.

3. The rewinding tray support according to claim 2, wherein: The base is provided with an opening for allowing the rewind core to pass through the surface of the base, and the opening has a sufficient size to enable the rewind core to rotate back and forth between the first position and the second position; The rewinding material tray bracket includes a rotating shaft, and the rotating shaft passes through the rotating arm and is fixed to both ends of the opening.

4. The rewinding tray support according to claim 3, wherein: The elastic member is sleeved on the rotating shaft, one end of the elastic member is fixed in the base, and the other end of the elastic member is movably abutted against the rotating arm.

5. The rewinding tray support according to claim 1, wherein: The base has a plurality of claws, each of which is a cantilever structure. Each claw is provided with more than two inclined surfaces or arc surfaces. The maximum distance between two adjacent claws along the radial direction of the base is greater than the inner circle diameter of the wire disc.

6. The rewinding tray support according to claim 2, wherein: An elastic part is provided at the end of the rotating arm away from the base, and the elastic part includes an elastic protrusion. The protrusion is arranged on a connecting bridge, and the connecting bridge is connected to the rotating arm. The protrusion and the outer surface of the friction part form a cylindrical surface, and the diameter of the cylindrical surface is greater than or equal to the inner ring diameter of the wire disc.

7. The rewinding tray support according to claim 2, wherein: An elastic portion is provided at one end of the rotating arm away from the base, and the elastic portion includes a spring and a protrusion. One end of the spring abuts against the rotating arm, and the other end of the spring abuts against the protrusion. The surface of the rotating arm away from the base has an opening, and the protrusion partially or completely protrudes from the opening.

8. A rewinding tray device, comprising a wire tray and a rewinding tray support, wherein the wire tray is mounted on the rewinding tray support, and characterized in that: The rewinding material tray bracket is the rewinding material tray bracket according to any one of claims 1 to 7, and the wire feeding direction of the wire tray is consistent with the direction in which the rewinding core rotates from the first position to the second position.

9. The rewinding tray device according to claim 8, characterized in that: The clamping claw clamps the wire disc in the axial direction, and the friction part contacts the inner ring of the wire disc. When the friction force between the wire disc and the friction part is greater than the restoring force of the elastic member, the wire disc can be reset together with the rewinding core.

10. A 3D printer comprising a frame and a rewinding tray device, characterized in that: The rewinding tray device is the rewinding tray device according to any one of claims 8 to 9, and the rewinding tray bracket is fixed to the frame.

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