3D printer consumable extruder structure
By employing a dual-gear structure and adjustment components in the 3D printing equipment, the problems of limited filament thrust and unstable extrusion under single-gear drive are solved, achieving stable and efficient filament extrusion.
Patent Information
- Application Number
- CN202511031835.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-25
- Publication Date
- 2025-10-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the extrusion mechanism of existing 3D printing equipment, the single gear drive method results in limited filament thrust, and the small contact area between the filament and the gear easily leads to unstable extrusion.
The device employs a dual-gear structure, connecting the first and second gear sets via a drive assembly. This increases the contact area between the consumables and the gear sets, and the meshing relationship between the two gear sets is adjusted via an adjustment assembly, ensuring the stability of the consumables during the extrusion process.
It increases the thrust of consumables, reduces slippage, and improves the extrusion stability and extrusion rate of consumables.
Smart Images
Figure CN120840082A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of 3D printing technology, and more particularly to a structure for a 3D printer filament extruder. Background Technology
[0002] 3D printing is a technology that constructs three-dimensional objects by printing layer by layer using powdered materials such as metal or plastic based on digital models. Specifically, in a 3D printer using FDM technology, a feeding mechanism provides the device with a thermoplastic filament, which is heated to a molten state within the hot end. The hot end then extrudes the molten material onto the printing panel as it moves along the printer's printing path, printing the three-dimensional object layer by layer.
[0003] 3D printing equipment is developing rapidly and has gradually come into people's view and been applied to various industries. Its printing process mainly relies on the extrusion mechanism to melt and extrude the printing material. Most existing extrusion mechanisms place the printing material between an actively rotating filament feeding gear and a driven wheel. The driven wheel compresses the printing material to ensure that the printing material is in close contact with the filament feeding gear, so that the filament feeding gear can drive the printing material to feed.
[0004] However, the single-gear drive method relies on only one drive gear and passive bearing to press the consumable, which limits the thrust of the consumable. In addition, the small contact area between the wire and the gear makes it easy for unstable extrusion to occur. Summary of the Invention
[0005] This invention specifically provides a structure for a 3D printer filament extruder.
[0006] The 3D printer filament extruder structure provided by the present invention includes a base plate (2), a cover plate (4), a first gear set (6), a second gear set (5), and a drive assembly (1); the cover plate (4) is fixed to one side of the base plate (2) by screws (9); the first gear set (6) and the second gear set (5) are both disposed between the base plate (2) and the cover plate (4); the first gear set (6) and the second gear set (5) are both connected to the drive assembly (1) for transmission; the filament (7) is clamped between the first gear set (6) and the second gear set (5).
[0007] Preferably, the drive assembly (1) includes a motor (11), a first drive gear (12), and an intermediate gear (13); the first gear set (6) includes a first drive wheel (62), a first roller (63), and a second roller (61); a motor output shaft (01), a second pin (08), a third pin (07), and a fourth pin (02) are fixed between the base plate (2) and the cover plate (4); the first drive gear (12) is fixed to the motor output shaft (01) via a bearing; the intermediate gear (13) is fixed to the second drive gear (61) via a bearing. The first roller (63) is fixed to the third pin (07) via a bearing; the second roller (61) is fixed to the fourth pin (02) via a bearing; the first drive gear (12) is fixed to the output shaft of the motor (11); the first drive gear (12), the intermediate gear (13) and the first drive wheel (62) mesh in sequence; the first roller (63) and the second roller (61) are respectively arranged on both sides of the first drive wheel (62) and both mesh with the first drive wheel (62).
[0008] Preferably, the 3D printer consumable (7) extruder structure provided by the present invention further includes an adjustment component (3); the adjustment component (3) includes a first rocker arm (33), a second rocker arm (31), a fifth pin (04), a sixth pin (05), and a seventh pin (03); the cover plate (4) is provided with a first through hole (43) and a second through hole (44); the second gear set (5) includes a second drive wheel (52), a third roller (53), and a fourth roller (51); one end of the fifth pin (04) is fixed on the base plate (2), and the other end passes through the cover plate (4) and protrudes outward and is hinged to one end of the first rocker arm (33) and the second rocker arm (31); one end of the sixth pin (05) and the first drive wheel (33) are hinged to one end of the second drive wheel (33) and the third drive wheel (31). One end of a rocker arm (33) is fixed away from the fifth pin (04), and the other end passes through the second through hole (44) and is fixed to the third roller (53) through a bearing; one end of the seventh pin (03) is fixed to the end of the second rocker arm (31) away from the fifth pin (04), and the other end passes through the first through hole (43) and is fixed to the fourth roller (51) through a bearing; the second drive wheel (52) is fixed to the fifth pin (04) through a bearing; the second drive wheel (52) meshes with the first drive wheel (62); the third roller (53) and the fourth roller (51) are arranged on both sides of the second drive wheel (52) and both mesh with the second drive wheel (52).
[0009] Preferably, the first roller (63), the second roller (61), the third roller (53), and the fourth roller (51) have the same structure; the first roller (63) includes a gear body (631) and a polyurethane wheel body (632); the gear body (631) is fixed to one side of the polyurethane wheel body (632); the diameter of the polyurethane wheel body (632) is larger than that of the gear body (631); the consumable (7) is clamped between the polyurethane wheel body (632) on the first roller (63) and the polyurethane wheel body (632) on the third roller (53), and between the polyurethane wheel body (632) on the second roller (61) and the polyurethane wheel body (632) on the fourth roller (51).
[0010] Preferably, the polyurethane wheel body (632) is provided with grooves.
[0011] Preferably, the adjustment assembly (3) further includes two sets of hand-tightening screws (31); the cover plate (4) has first bosses (41) on both sides; each of the two first bosses (41) has a threaded hole; the hand-tightening screws (31) are screwed into the threaded holes; the ends of the two hand-tightening screws (31) respectively abut against the first rocker arm (33) and the second rocker arm (31).
[0012] Preferably, the end of the hand-tightening screw (31) is hemispherical.
[0013] Preferably, each of the two first protrusions (41) is provided with a strip-shaped third through hole (42); the ends of the first rocker arm (33) and the second rocker arm (31) are fixed with limit rods (34); the two limit rods (34) are respectively inserted into the two third through holes (42).
[0014] Preferably, the bottom plate (2) is provided with a second boss (21) at both ends; a quick connector (8) is assembled on each of the second bosses (21).
[0015] Preferably, the base plate (2) is further provided with a third boss (22); the third boss (22) is located between the two quick connectors (8); the third boss (22) is provided with a fourth through hole; the two quick connectors (8) and the fourth through hole are coaxially arranged.
[0016] The 3D printer filament extruder structure provided by the present invention allows the filament (7) to pass between and be clamped between the first gear set (6) and the second gear set (5). Since both the first gear set (6) and the second gear set (5) are connected to the drive assembly (1), both the first gear set (6) and the second gear set (5) have driving force, thereby increasing the thrust of the filament (7). At the same time, the two gear sets increase the contact surface between the filament (7) and the gear sets, which can effectively reduce the slippage of the filament (7) and improve the stability of the filament (7) extrusion. Attached Figure Description
[0017] Figure 1 This is a first-view structural schematic diagram of the 3D printer consumable extruder structure provided by the present invention.
[0018] Figure 2 This is a first-view exploded view of the structure of the 3D printer consumable extruder provided by the present invention.
[0019] Figure 3 This is a second-view exploded view of the 3D printer consumable extruder structure provided by the present invention.
[0020] Figure 4 This is a second-view structural schematic diagram of the 3D printer consumable extruder structure provided by the present invention.
[0021] Figure 5 for Figure 4 Cross-sectional view of the central section line AA;
[0022] Figure 6 for Figure 4 Cross-sectional view of the central section line BB;
[0023] Figure 7 This is a third-view structural diagram of the 3D printer consumable extruder structure provided by the present invention.
[0024] Figure 8 for Figure 7 Cross-sectional view of the central section line CC;
[0025] Figure 9 This is a schematic diagram of the assembly of the first roller, second roller, third roller, fourth roller and consumables provided in an embodiment of the present invention. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0027] like Figures 1-9 As shown, the 3D printer filament extruder structure provided in this embodiment includes a base plate 2, a cover plate 4, a first gear set 6, a second gear set 5, and a drive assembly 1. The cover plate 4 is fixed to one side of the base plate 2 by screws 9. The first gear set 6 and the second gear set 5 are both disposed between the base plate 2 and the cover plate 4. The first gear set 6 and the second gear set 5 are both connected to the drive assembly 1. The filament 7 is clamped between the first gear set 6 and the second gear set 5. Those skilled in the art will understand that the filament 7 passes through and is clamped between the first gear set 6 and the second gear set 5. Since both the first gear set 6 and the second gear set 5 are connected to the drive assembly 1, both the first gear set 6 and the second gear set 5 have driving force, thereby increasing the thrust of the filament 7. Simultaneously, the two gear sets increase the contact surface between the filament 7 and the gear sets, effectively reducing slippage of the filament 7 and improving the stability of the filament 7 extrusion.
[0028] Furthermore, the drive assembly 1 includes a motor 11, a first drive gear 12, and an intermediate gear 13; the first gear set 6 includes a first drive wheel 62, a first roller 63, and a second roller 61; a motor output shaft 01, a second pin 08, a third pin 07, and a fourth pin 02 are fixed between the base plate 2 and the cover plate 4; the first drive gear 12 is fixed to the motor output shaft 01 via bearings; the intermediate gear 13 is fixed to the second pin 08 via bearings; the first roller 63 is fixed to the third pin 07 via bearings; the second roller 61 is fixed to the fourth pin 02 via bearings; the first drive gear 12 is fixed to the output shaft of the motor 11; the first drive gear 12, the intermediate gear 13, and the first drive wheel 62 mesh sequentially; the first roller 63 and the second roller 61 are respectively disposed on both sides of the first drive wheel 62 and both mesh with the first drive wheel 62. Those skilled in the art will understand that the rotation of the motor 11, through the transmission of the intermediate gear 13, drives the first drive wheel 62 to rotate, which in turn drives the first roller 63 and the second roller 61 to rotate, and the first roller 63 and the second roller 61 rotate in the same direction.
[0029] Furthermore, the 3D printer consumable 7 extruder structure provided in this embodiment also includes an adjustment component 3; the adjustment component 3 includes a first rocker arm 33, a second rocker arm 31, a fifth pin 04, a sixth pin 05, and a seventh pin 03; the cover plate 4 is provided with a first through hole 43 and a second through hole 44; the second gear set 5 includes a second drive wheel 52, a third roller 53, and a fourth roller 51; one end of the fifth pin 04 is fixed to the base plate 2, and the other end passes through the cover plate 4 and protrudes outward and is hinged to one end of the first rocker arm 33 and the second rocker arm 31; one end of the sixth pin 05 is connected to the first rocker arm 33... 3. One end of the seventh pin 03 is fixed away from the fifth pin 04, and the other end passes through the second through hole 44 and is fixed to the third roller 53 through a bearing; one end of the seventh pin 03 and the second rocker arm 31 are fixed away from the fifth pin 04, and the other end passes through the first through hole 43 and is fixed to the fourth roller 51 through a bearing; the second drive wheel 52 is fixed to the fifth pin 04 through a bearing; the second drive wheel 52 meshes with the first drive wheel 62; the third roller 53 and the fourth roller 51 are arranged on both sides of the second drive wheel 52 and both mesh with the second drive wheel 52. Those skilled in the art will understand that, since the first roller 63 and the second roller 61 are fixed between the base plate 2 and the cover plate 4, and the third roller 53 and the fourth roller 51 are suspended between the base plate 2 and the cover plate 4 respectively by the first rocker arm 33 and the second rocker arm 31, the distance between the third roller 53 and the first roller 63, the fourth roller 51 and the second roller 61 can be adjusted by rotating the first rocker arm 33 and the second rocker arm 31. The rotation axis of the first rocker arm 33 and the rotation axis of the second rocker arm 31 are coaxial with the axis of the second driving gear, which ensures that the second driving wheel 52 is always properly meshed with the third roller 53 and the fourth roller 51 when the first rocker arm 33 and the second rocker arm 31 are rotating.
[0030] Furthermore, the first roller 63, the second roller 61, the third roller 53, and the fourth roller 51 have the same structure; the first roller 63 includes a gear body 631 and a polyurethane wheel body 632; the gear body 631 is fixed to one side of the polyurethane wheel body 632; the diameter of the polyurethane wheel body 632 is larger than that of the gear body 631; the consumable 7 is clamped between the polyurethane wheel body 632 on the first roller 63 and the polyurethane wheel body 632 on the third roller 53, and between the polyurethane wheel body 632 on the second roller 61 and the polyurethane wheel body 632 on the fourth roller 51. Those skilled in the art will understand that the diameter of the polyurethane wheel body 632 is larger than the diameter of the toothed portion, thus ensuring that the gear portion does not mesh or interfere when the polyurethane wheel body 632 clamps the consumable 7.
[0031] Furthermore, the polyurethane wheel body 632 is provided with grooves. Those skilled in the art will understand that the consumable 7 abuts against the grooves, which can limit the consumable 7 and thereby increase the extrusion rate of the consumable 7.
[0032] Furthermore, the adjustment assembly 3 also includes two sets of hand-tightening screws 31; the cover plate 4 has first protrusions 41 on both sides; each of the two first protrusions 41 has a threaded hole; the hand-tightening screws 31 are screwed into the threaded holes; the ends of the two hand-tightening screws 31 respectively abut against the first rocker arm 33 and the second rocker arm 31. Those skilled in the art will understand that the clamping force between the first roller 63 and the third roller 53, and between the second roller 61 and the fourth roller 51, can be adjusted by tightening the hand-tightening screws 31.
[0033] Furthermore, the end of the hand-tightening screw 31 is hemispherical. Those skilled in the art will understand that the hemispherical head structure at the end of the hand-tightening screw 31 can maintain good contact during the rotation of the first rocker arm 33 and the second rocker arm 31.
[0034] Furthermore, each of the two first protrusions 41 is provided with a strip-shaped third through hole 42; the ends of the first swing rod 33 and the second swing rod 31 are both fixed with limiting rods 34; the two limiting rods 34 are respectively inserted into the two third through holes 42. Those skilled in the art will understand that the third through hole 42 provides support to one end of the first swing rod 33 or the second swing rod 31 by means of the limiting rods 34, preventing the first swing rod 33 or the second swing rod 31 from becoming a cantilever beam, and increasing the stress stability of the first swing rod 33 and the second swing rod 31.
[0035] Furthermore, the base plate 2 is provided with second protrusions 21 at both ends; quick connectors 8 are mounted on each of the second protrusions 21. Those skilled in the art will understand that the quick connectors 8 are prior art and will not be described in detail here. The two quick connectors 8 are used for the inlet and outlet of the consumable 7, respectively.
[0036] Furthermore, the base plate 2 is also provided with a third protrusion 22; the third protrusion 22 is located between the two quick connectors 8; the third protrusion 22 is provided with a fourth through hole; the two quick connectors 8 and the fourth through hole are coaxially arranged. Those skilled in the art will understand that the third through hole 42 can restrict the bending of the consumable 7, keeping the consumable 7 straight and preventing it from breaking.
[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A structure for a 3D printer filament extruder, characterized in that, It includes a base plate (2), a cover plate (4), a first gear set (6), a second gear set (5), and a drive assembly (1); the cover plate (4) is fixed to one side of the base plate (2) by screws (9); the first gear set (6) and the second gear set (5) are both disposed between the base plate (2) and the cover plate (4); the first gear set (6) and the second gear set (5) are both connected to the drive assembly (1) for transmission; and a consumable (7) is clamped between the first gear set (6) and the second gear set (5).
2. The 3D printer filament extruder structure as described in claim 1, characterized in that, The drive assembly (1) includes a motor (11), a first drive gear (12), and an intermediate gear (13); the first gear set (6) includes a first drive wheel (62), a first roller (63), and a second roller (61); a motor output shaft (01), a second pin (08), a third pin (07), and a fourth pin (02) are fixed between the base plate (2) and the cover plate (4); the first drive gear (12) is fixed to the motor output shaft (01) via a bearing; the intermediate gear (13) is fixed to the second pin via a bearing. (08) Fixed to each other; the first roller (63) is fixed to the third pin (07) through a bearing; the second roller (61) is fixed to the fourth pin (02) through a bearing; the first drive gear (12) and the output shaft of the motor (11) are fixed to each other; the first drive gear (12), the intermediate gear (13) and the first drive wheel (62) mesh in sequence; the first roller (63) and the second roller (61) are respectively arranged on both sides of the first drive wheel (62) and both mesh with the first drive wheel (62).
3. The 3D printer filament extruder structure as described in claim 2, characterized in that, It also includes an adjustment assembly (3); the adjustment assembly (3) includes a first rocker arm (33), a second rocker arm (31), a fifth pin (04), a sixth pin (05), and a seventh pin (03); the cover plate (4) is provided with a first through hole (43) and a second through hole (44); the second gear set (5) includes a second drive wheel (52), a third roller (53), and a fourth roller (51); one end of the fifth pin (04) is fixed to the base plate (2), and the other end passes through the cover plate (4) and protrudes outward and is hinged to one end of the first rocker arm (33) and the second rocker arm (31); one end of the sixth pin (05) and the first rocker arm (33) are away from the fifth pin. One end of the shaft (04) is fixed, and the other end passes through the second through hole (44) and is fixed to the third roller (53) through a bearing; one end of the seventh pin (03) is fixed to the end of the second rocker arm (31) away from the fifth pin (04), and the other end passes through the first through hole (43) and is fixed to the fourth roller (51) through a bearing; the second drive wheel (52) is fixed to the fifth pin (04) through a bearing; the second drive wheel (52) meshes with the first drive wheel (62); the third roller (53) and the fourth roller (51) are arranged on both sides of the second drive wheel (52) and both mesh with the second drive wheel (52).
4. The 3D printer filament extruder structure as described in claim 3, characterized in that, The first roller (63), the second roller (61), the third roller (53), and the fourth roller (51) have the same structure; the first roller (63) includes a gear body (631) and a polyurethane wheel body (632); the gear body (631) is fixed to one side of the polyurethane wheel body (632); the diameter of the polyurethane wheel body (632) is larger than that of the gear body (631); the consumable (7) is clamped between the polyurethane wheel body (632) on the first roller (63) and the polyurethane wheel body (632) on the third roller (53), and between the polyurethane wheel body (632) on the second roller (61) and the polyurethane wheel body (632) on the fourth roller (51).
5. The 3D printer filament extruder structure as described in claim 4, characterized in that, The polyurethane wheel body (632) is provided with grooves.
6. The 3D printer filament extruder structure as described in claim 5, characterized in that, The adjustment assembly (3) also includes two sets of hand-tightening screws (31); the cover plate (4) has first bosses (41) on both sides; each of the two first bosses (41) has a threaded hole; the hand-tightening screws (31) are screwed into the threaded holes; the ends of the two hand-tightening screws (31) respectively abut against the first rocker arm (33) and the second rocker arm (31).
7. The 3D printer filament extruder structure as described in claim 6, characterized in that, The end of the hand-tightening screw (31) is hemispherical.
8. The 3D printer filament extruder structure as described in claim 7, characterized in that, Both of the first bosses (41) are provided with strip-shaped third through holes (42); the ends of the first rocker arm (33) and the second rocker arm (31) are fixed with limit rods (34); the two limit rods (34) are respectively inserted into the two third through holes (42).
9. The 3D printer filament extruder structure as described in claim 8, characterized in that, The base plate (2) has a second boss (21) at each end; quick connectors (8) are mounted on the second boss (21).
10. The 3D printer filament extruder structure as described in claim 9, characterized in that, The base plate (2) is also provided with a third boss (22); the third boss (22) is located between the two quick connectors (8); the third boss (22) is provided with a fourth through hole; the two quick connectors (8) and the fourth through hole are coaxially arranged.