A breakage protection device for an FDM printer

Abstract

This utility model relates to the field of FDM printer technology, and more particularly to a wire breakage protection device for FDM printers, including a wire feeder and a feed port. The wire feeder has a first support roller and a second support roller movably mounted for overlapping the wire, and a support mechanism that tensions the wire via the first and second support rollers. An elastic clamping member is movably mounted on the feed port to hold the wire. This utility model features a wire feeder with the first and second support rollers staggered to maintain the taut and orderly state of the S-shaped wire. A drive gear and a driven gear are meshed at the annular feed port. A driven disk is rotatably mounted on the driven gear, and crescent-shaped protrusions are circumferentially distributed on the driven disk to facilitate the traction of the elastic clamping member, thereby symmetrically clamping and limiting the wire passing through the feed port.

Description

Technical Field

[0001] This utility model relates to the field of FDM printer technology, and in particular to a wire breakage protection device for FDM printers. Background Technology

[0002] FDM materials are generally thermoplastics, such as wax, ABS, and nylon. They are fed in filaments. The material is heated and melted inside the nozzle, which moves along the cross-sectional contour and filling trajectory of the part, simultaneously extruding the molten material. The material quickly solidifies and binds with the surrounding material.

[0003] Existing FDM printers use a wire breakage protection device disclosed in CN209599854U, which uses a spring to support a limiting rod, ensuring the stability of the filament within the limiting ring. An adjusting disc and adjusting block form an engaging connection, facilitating the simultaneous sliding of the adjusting rod within the limiting ring and thus fixing the filament position. However, the filament itself is thin, long, flexible, and easily deformable, making it difficult to precisely limit and fix it. Furthermore, during feeding, it's impossible to guarantee orderly filament delivery, easily leading to wrinkles, overlaps, or even breakage. This can easily cause filament breakage and feeding stoppage, severely impacting the smooth operation of the printing process. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the long, soft, and lightweight filamentous wire structure in the prior art affects the orderly feeding of materials, and to propose a wire breakage protection device for FDM printers.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wire breakage protection device for an FDM printer includes a wire feeder and a feed outlet. The wire feeder is provided with a support mechanism that tensions the wire through a first support roller and a second support roller. The feed outlet is movably provided with an elastic clamping member that holds the wire, and the feed outlet is provided with a traction mechanism for adjusting the radial movement of the elastic clamping member.

[0006] Preferably, the wire feeder and the discharge port are distributed from left to right, and the discharge port has a ring-shaped structure.

[0007] Preferably, the support mechanism includes a traction turntable rotatably mounted on the wire feeder, two traction rods integrally connected to the traction turntable, two guide holes in the wire feeder, and movable sliders slidably mounted in the two guide holes, which are movably pulled by the traction rods and used to rotatably mount the first support roller and the second support roller, and a third support roller for upward support of the wire is fixedly provided on the discharge port.

[0008] Preferably, the traction rod is eccentrically mounted on the traction turntable, and the two guide holes are symmetrically arranged about the center of the traction turntable.

[0009] Preferably, the traction mechanism includes a drive gear rotatably mounted on the discharge port, a guide disc rotatably mounted on the discharge port, a driven gear integrally connected to the guide disc and meshing with the drive gear, a crescent-shaped protrusion fixedly mounted on the guide disc, and a driven bolt integrally connected to the elastic clamping member that movably abuts against the crescent-shaped protrusion.

[0010] Preferably, the discharge port is provided with a guide ring groove for slidingly mounting a guide disc.

[0011] Compared with the prior art, the present invention has the following advantages: 1. This utility model is equipped with a wire feeder, on which a first support roller and a second support roller are staggered. The moving slider used to install the first support roller and the second support roller is synchronously pulled by a traction turntable. By adjusting the first support roller and the second support roller, the wire can be staggered and supported, so that the S-shaped wire remains taut and orderly.

[0012] 2. The annular structure of this utility model has a drive gear and a driven gear that are meshed together at the outlet position. A driven disk is mounted on the driven gear and crescent-shaped protrusions are circumferentially distributed on the driven disk to facilitate the movement and traction of the elastic clamping member, thereby symmetrically clamping and limiting the wire passing through the outlet. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a wire breakage protection device for an FDM printer proposed in this utility model; Figure 2 Left view of a wire breakage protection device for an FDM printer proposed in this utility model; Figure 3 This is a right view of a wire breakage protection device for an FDM printer proposed in this utility model; Figure 4 This is a cross-sectional view of a wire breakage protection device for an FDM printer proposed in this utility model. Figure 5 This is an enlarged schematic diagram of part A of a wire breakage protection device for an FDM printer proposed in this utility model.

[0014] In the diagram: 1. Wire feeder; 2. Discharge port; 3. Support mechanism; 31. Traction turntable; 32. Traction rod; 33. Guide elongated hole; 34. Moving slider; 35. First support roller; 36. Second support roller; 37. Third support roller; 4. Traction mechanism; 41. Drive gear; 42. Guide ring groove; 43. Guide disc; 44. Driven gear; 45. Crescent-shaped protrusion; 46. Elastic clamping element; 47. Driven bolt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1-5 A wire breakage protection device for an FDM printer includes a wire feeder 1 and a wire outlet 2. See the attached instruction manual for details. Figure 1 -Appendix Figure 3 The wire is introduced from the left side, passes through the first support roller 35, the second support roller 36 and the third support roller 37 in sequence, and is then output from the center of the outlet 2.

[0017] The wire feeder 1 is movably equipped with a first support roller 35 and a second support roller 36 for overlapping the wire, and the wire feeder 1 is also equipped with a support mechanism 3 for tightening the wire through the first support roller 35 and the second support roller 36. The support mechanism 3 includes a traction turntable 31 rotatably mounted on the wire feeder 1, and a first motor is provided on the wire feeder 1 for driving the traction turntable 31 to rotate. Two traction rods 32 are integrally connected to the traction turntable 31, and two guide elongated holes 33 are opened in the wire feeder 1. A traction rod is slidably installed in the two guide elongated holes 33. The pull rod 32 is used to pull and rotate the movable slider 34 that mounts the first support roller 35 and the second support roller 36. It should be noted that the pull rod 32 has a pull groove, and the movable slider 34 is integrally connected to a pull yoke that is slidably fitted in the pull groove. Under the pull action of the pull turntable 31, the first support roller 35 and the second support roller 36 move towards or away from each other. A third support roller 37 is fixedly installed on the discharge port 2 to support the wire upward. It is obliquely arranged so that the wire passes horizontally through the center position of the discharge port 2.

[0018] The discharge port 2 is movably provided with an elastic clamping member 46 for clamping the wire, and the discharge port 2 is provided with a traction mechanism 4 for adjusting the radial movement of the elastic clamping member 46. The traction mechanism 4 includes a drive gear 41 rotatably mounted on the discharge port 2, a guide disk 43 rotatably mounted on the discharge port 2, and a driven gear 44 integrally connected to the guide disk 43 and meshing with the drive gear 41. It should be noted that the discharge port 2 is provided with a second motor for driving the drive gear 41 to rotate. A crescent-shaped protrusion 45 is fixedly mounted on the guide disk 43, and a driven bolt 47 that movably abuts against the crescent-shaped protrusion 45 is integrally connected to the elastic clamping member 46. The crescent-shaped protrusions 45 and the elastic clamping members 46 are circumferentially equidistantly distributed in a one-to-one correspondence. The elastic clamping member 46 performs radial extension and retraction movement under the pressure of the crescent-shaped protrusions 45, so as to clamp and limit the wire passing through the discharge port 2 from multiple directions such as up, down, left, and right.

[0019] The wire feeder 1 and the discharge port 2 are distributed from left to right, and the discharge port 2 has a ring structure so that the wire can pass through the discharge port 2 in an orderly manner after being tightened, thus achieving orderly feeding.

[0020] The traction rod 32 is eccentrically mounted on the traction turntable 31, and the two guide holes 33 are symmetrically arranged about the center of the traction turntable 31 to facilitate the setting of the first support roller 35 and the second support roller 36 that are staggered vertically, so that the wire has a taut S-shaped structure.

[0021] The discharge port 2 is provided with a guide ring groove 42 for sliding installation of guide disc 43.

[0022] It should be noted that the specific models and specifications of the first and second motors need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods use existing technology in this field, so they will not be elaborated here.

[0023] The functional principle of this utility model can be explained through the following operation methods: The traction turntable 31 is controlled to deflect, and the traction turntable 31 drives the movable slider 34 to move in the opposite direction along the guide hole 33, so that the first support roller 35 and the second support roller 36 move in the opposite direction to tighten the wire. The drive gear 41 is controlled to rotate, and the driven gear 44 drives the guide disk 43 to deflect. The guide disk 43 applies pressure to the driven bolt 47 through the crescent-shaped protrusion 45, so that the elastic clamping member 46 performs radial extension and retraction to clamp and limit the wire passing through the discharge port 2.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A wire breakage protection device for an FDM printer, comprising a wire feeder (1) and a feed outlet (2), characterized in that, The wire feeder (1) is movably provided with a first support roller (35) and a second support roller (36) for overlapping the wire, and the wire feeder (1) is provided with a support mechanism (3) for tightening the wire through the first support roller (35) and the second support roller (36). The discharge port (2) is movably provided with an elastic clamping member (46) for clamping the wire, and the discharge port (2) is provided with a traction mechanism (4) for adjusting the radial movement of the movable traction elastic clamping member (46).

2. The wire breakage protection device for an FDM printer according to claim 1, characterized in that, The wire feeder (1) and the discharge port (2) are distributed from left to right, and the discharge port (2) has a ring structure.

3. A wire breakage protection device for an FDM printer according to claim 1, characterized in that, The support mechanism (3) includes a traction turntable (31) rotatably mounted on the wire feeder (1). Two traction rods (32) are integrally connected to the traction turntable (31). Two guide holes (33) are opened in the wire feeder (1). A movable slider (34) is slidably mounted in the two guide holes (33), which is movably pulled by the traction rods (32) and used to rotatably mount the first support roller (35) and the second support roller (36). A third support roller (37) for supporting the wire upward is fixedly set on the discharge port (2).

4. A wire breakage protection device for an FDM printer according to claim 3, characterized in that, The traction rod (32) is eccentrically mounted on the traction turntable (31), and the two guide holes (33) are symmetrically arranged about the center of the traction turntable (31).

5. A wire breakage protection device for an FDM printer according to claim 1, characterized in that, The traction mechanism (4) includes a drive gear (41) rotatably mounted on the discharge port (2), a guide disc (43) rotatably mounted on the discharge port (2), and a driven gear (44) integrally connected to the guide disc (43) and meshing with the drive gear (41). A crescent-shaped protrusion (45) is fixedly mounted on the guide disc (43), and a driven bolt (47) that moves against the crescent-shaped protrusion (45) is integrally connected to the elastic clamping member (46).

6. A wire breakage protection device for an FDM printer according to claim 5, characterized in that, The discharge port (2) is provided with a guide ring groove (42) for sliding installation of guide disc (43).

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