3D printing wire feeding mechanism

Abstract

The utility model discloses a 3D printing wire feeding mechanism, and relates to the technical field of 3D printing wire feeding mechanisms. A 3D printing wire feeding mechanism comprises a material pipe mounted on a mounting plate and a printing head mounted on the material pipe, and further comprises a connecting plate connected with the mounting plate, and a wire penetrating hole is formed in the connecting plate; the driving wheel and the driven wheel are rotationally mounted in the connecting plate and are used for conveying wires; the periphery of the driving wheel and the periphery of the driven wheel are coated with the splayed anti-slip strips respectively, and the splayed anti-slip strips are oppositely arranged on the driving wheel and the driven wheel; according to the utility model, the inverted V-shaped anti-slip strips are oppositely arranged on the driving wheel and the driven wheel, the contact area of wires is gradually increased by utilizing a gradually-changed clamping area from a wide area to a narrow area, and the adsorption force generated by the negative pressure suction holes is combined, so that the dual effects are realized, the slip risk is remarkably reduced, the continuity and stability of wire conveying are ensured, and the problem of printing interruption or step loss is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of 3D printing filament feeding mechanism, specifically, it relates to a 3D printing filament feeding mechanism. Background Technology

[0002] A 3D printer is an additive manufacturing device based on the principle of layer-by-layer material deposition. It heats and melts thermoplastic materials and precisely extrudes them to create three-dimensional solids. It is one of the most widely used and lowest-cost 3D printing technologies currently available.

[0003] Most existing 3D printer filament feeding devices use a single-sided power drive. When using the above-mentioned 3D printer filament feeding devices to transmit filament, slippage between the feeding wheel and the filament can easily occur due to issues such as the type and thickness of the filament. Therefore, a 3D printing filament feeding mechanism is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a 3D printing filament feeding mechanism that can overcome or at least partially solve the above problems.

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: a 3D printing filament feeding mechanism, including a material tube mounted on a mounting plate and a print head mounted on the material tube, and further including: a connecting plate connected to the mounting plate, the connecting plate having a filament threading hole; a driving wheel and a driven wheel, rotatably mounted in the connecting plate for conveying filament; and figure-eight anti-slip strips, respectively circumferentially covering the outer circumference of the driving wheel and the driven wheel, the figure-eight anti-slip strips being arranged opposite to each other on the driving wheel and the driven wheel.

[0006] Furthermore, the figure-eight anti-slip strip has a narrow area at one end and a wide area at the other end, with a gradual clamping area formed between the narrow and wide areas.

[0007] Furthermore, negative pressure suction holes are formed on the outer circumference of the driving wheel and the driven wheel.

[0008] Furthermore, the negative pressure suction hole is located inside the figure-eight anti-slip strip.

[0009] Preferably, a motor is mounted on the connecting plate, and the drive wheel is mounted on the motor output shaft.

[0010] Furthermore, a connecting rod and a connecting block are rotatably connected to the connecting plate, one end of the connecting block is sleeved on the connecting rod, a spring is sleeved on the connecting rod located on one side of the connecting block, the compression of the spring is adjusted by an adjusting bolt, and the driven wheel is set on the connecting block.

[0011] Furthermore, an adjusting block is connected to the connecting block, and the driven wheel is rotatably connected to the adjusting block.

[0012] Furthermore, the connecting plate is provided with heat dissipation grooves.

[0013] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0014] 1. This 3D printing filament feeding mechanism uses figure-eight anti-slip strips arranged opposite each other on the driving and driven wheels to gradually increase the contact area of ​​the filament by using a gradually narrowing clamping area. Combined with the adsorption force generated by the negative pressure suction hole, the dual effect significantly reduces the risk of slippage, ensures the continuity and stability of filament feeding, and avoids printing interruption or step loss.

[0015] 2. The 3D printing filament feeding mechanism adopts an elastic clamping function combining springs and adjusting bolts, which can finely adjust the clamping force of the driven wheel to adapt to filaments of different diameters or surface roughness; the cooperation between the adjusting block and the connecting block further enables rapid spacing adjustment, improving the compatibility and ease of operation of this device.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the outer shell of a 3D printing filament feeding mechanism proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the material tube and mounting plate of a 3D printing filament feeding mechanism proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the print head structure of a 3D printing filament feeding mechanism proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the negative pressure tube of a 3D printing filament feeding mechanism proposed in this utility model;

[0022] Figure 5 This is a schematic diagram of the connecting plate of a 3D printing filament feeding mechanism proposed in this utility model;

[0023] Figure 6 This is a schematic diagram of the driving wheel and driven wheel of a 3D printing filament feeding mechanism proposed in this utility model;

[0024] Figure 7 This is a schematic diagram of the filament feeding hole of a 3D printing filament feeding mechanism proposed in this utility model;

[0025] Figure 8 This is a schematic diagram of the anti-slip strip of a 3D printing filament feeding mechanism proposed in this utility model.

[0026] Figure 9 This is a schematic diagram of the wide and narrow sections of a 3D printing filament feeding mechanism proposed in this utility model.

[0027] Figure 10 This is a schematic diagram of the negative pressure suction hole of a 3D printing filament feeding mechanism proposed in this utility model.

[0028] In the diagram: 1. Mounting plate; 10. Wire; 11. Feed tube; 12. Print head; 2. Motor; 20. Drive wheel; 200. Wire threading hole; 21. Connecting plate; 22. Connecting rod; 23. Connecting block; 24. Spring; 25. Adjusting bolt; 26. Adjusting block; 27. Driven wheel; 28. Negative pressure pipe; 29. ​​Heat dissipation groove; 3. Figure-eight anti-slip strip; 31. Wide area; 32. Narrow area; 33. Gradient clamping area; 4. Negative pressure suction hole; 5. Outer shell. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] Example: Refer to Figures 1-10 A 3D printing filament feeding mechanism includes a fused deposition modeling (FDM) 3D printed housing 5, a feed tube 11 mounted on a mounting plate 1, and a print head 12 mounted on the feed tube 11. The mounting plate 1 is located inside the housing 5. The mechanism also includes a connecting plate 21 connected to the mounting plate 1, the connecting plate 21 having a filament threading hole 200; a drive wheel 20 and a driven wheel 27, rotatably mounted in the connecting plate 21 for feeding filament 10; and figure-eight anti-slip strips 3, which respectively circumferentially cover the outer periphery of the drive wheel 20 and the driven wheel 27, and are arranged opposite to each other on the drive wheel 20 and the driven wheel 27.

[0031] The figure-eight anti-slip strip 3 has a narrow area 32 at one end and a wide area 31 at the other end, with a gradually changing clamping area 33 between the narrow area 32 and the wide area 31.

[0032] Negative pressure suction holes 4 are provided on the outer circumference of the driving wheel 20 and the driven wheel 27. Negative pressure pipes 28 are rotatably connected to the shafts of the driving wheel 20 and the driven wheel 27 respectively, so that the negative pressure suction holes 4 generate negative pressure suction.

[0033] The negative pressure suction hole 4 is located inside the figure-eight anti-slip strip 3.

[0034] The motor 2 is mounted on the connecting plate 21, and the drive wheel 20 is mounted on the output shaft of the motor 2.

[0035] A connecting rod 22 and a connecting block 23 are rotatably connected to the connecting plate 21. One end of the connecting block 23 is sleeved on the connecting rod 22. A spring 24 is sleeved on the connecting rod 22 located on one side of the connecting block 23. The compression of the spring 24 is adjusted by adjusting bolt 25. The adjusting bolt 25 is threadedly connected to one end of the connecting rod 22. A driven wheel 27 is set on the connecting block 23.

[0036] An adjusting block 26 is connected to the connecting block 23, and the driven wheel 27 is rotatably connected to the adjusting block 26.

[0037] The connecting plate 21 has heat dissipation slots 29, which effectively reduce the working temperature of the motor 2, the drive wheel 20, and the driven wheel 27, and extend their service life.

[0038] When in use, one end of the filament 10 is passed through the filament hole 200 on the connecting plate 21, and the filament 10 is positioned between the driving wheel 20 and the driven wheel 27. The driving wheel 20 and the driven wheel 27 clamp the filament 10. The filament 10 that has passed through the filament hole 200 is then passed into the feed tube 11 and exits from the print head 12.

[0039] When it is necessary to feed the wire, the motor 2 drives the drive wheel 20 to rotate. Under the action of friction with the wire 10, it cooperates with the driven wheel 27 to feed the wire 10.

[0040] To further prevent slippage between the wire 10 and the driving wheel 20 and driven wheel 27, the figure-eight anti-slip strip 3 is provided. As the driving wheel 20 and driven wheel 27 rotate, the strip gradually moves from the wide area 31 towards the wire 10, so that the wire 10 is located in the gradually changing clamping area 33. When the gradually changing clamping area 33 comes into contact with the wire 10, the inner wall of the figure-eight anti-slip strip 3 will gradually come into contact with the surface of the wire 10, generating a clamping action. This increases the contact area between the wire 10 and the driving wheel 20 and driven wheel 27, thereby preventing slippage.

[0041] Furthermore, the negative pressure suction holes 4 on the drive wheel 20 and driven wheel 27 can also adsorb the filament 10 when it is close to it. This further avoids slippage between the filament 10 and the drive wheel 20 and driven wheel 27, thereby preventing problems such as interruption or loss of steps during the conveying process of the filament 10.

[0042] Secondly, the driven wheel 27 can also adjust the distance between itself and the driving wheel 20, and adjust the clamping force of the driven wheel 27 on the driving wheel 20. In this way, the clamping force on the filament 10 can be adjusted according to the thickness and surface roughness of different filaments 10, so as to further avoid slippage.

[0043] Specifically, by turning the adjusting bolt 25, the thrust of the spring 24 on the connecting block 23 can be adjusted, thereby causing the driven wheel 27 to move closer to or further away from the driving wheel 20, thus achieving fine-tuning operation;

[0044] The distance between the driven wheel 27 and the driving wheel 20 can be quickly adjusted by changing the position of the adjusting block 26 on the connecting block 23.

[0045] In another embodiment, the anti-slip strips 3 on the driving wheel 20 and the driven wheel 27, as well as the negative pressure suction holes 4, can be optionally configured.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A 3D printing filament feeding mechanism, comprising a feed tube (11) mounted on a mounting plate (1) and a print head (12) mounted on the feed tube (11), characterized in that, Also includes: A connecting plate (21) connected to the mounting plate (1) is provided with a wire threading hole (200); The driving wheel (20) and the driven wheel (27) are rotatably mounted in the connecting plate (21) for conveying the wire (10); The figure-eight anti-slip strips (3) are respectively circumferentially wrapped around the outer periphery of the driving wheel (20) and the driven wheel (27), and the figure-eight anti-slip strips (3) are arranged opposite to each other on the driving wheel (20) and the driven wheel (27).

2. The 3D printing filament feeding mechanism according to claim 1, characterized in that, The figure-eight anti-slip strip (3) has a narrow area (32) at one end and a wide area (31) at the other end, and a gradient clamping area (33) is formed between the narrow area (32) and the wide area (31).

3. A 3D printing filament feeding mechanism according to claim 1 or 2, characterized in that, Negative pressure suction holes (4) are provided on the outer circumference of the driving wheel (20) and the driven wheel (27).

4. A 3D printing filament feeding mechanism according to claim 3, characterized in that, The negative pressure suction hole (4) is located inside the figure-eight anti-slip strip (3).

5. A 3D printing filament feeding mechanism according to claim 3, characterized in that, A motor (2) is mounted on the connecting plate (21), and the drive wheel (20) is mounted on the output shaft of the motor (2).

6. A 3D printing filament feeding mechanism according to claim 5, characterized in that, The connecting plate (21) is rotatably connected to a connecting rod (22) and a connecting block (23). One end of the connecting block (23) is sleeved on the connecting rod (22). A spring (24) is sleeved on the connecting rod (22) located on one side of the connecting block (23). The compression of the spring (24) is adjusted by adjusting the bolt (25). The driven wheel (27) is set on the connecting block (23).

7. A 3D printing filament feeding mechanism according to claim 6, characterized in that, An adjusting block (26) is connected to the connecting block (23), and the driven wheel (27) is rotatably connected to the adjusting block (26).

8. A 3D printing filament feeding mechanism according to claim 6, characterized in that, The connecting plate (21) is provided with heat dissipation grooves (29).

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