Gear structure of 3D printer extruder

Abstract

The utility model discloses a 3D printer extruder gear structure in the technical field of 3D printing, which comprises a driving gear and a driven gear, the driving gear and the driven gear are flat-bottomed and wide-tangent-plane gears, the flat-bottomed and wide-tangent-plane gears are formed by connecting two cambered surfaces, the two end faces of each gear are flat, and the tangent plane of the periphery of each gear is provided with a certain radian. The driving gear is provided with a wide tangent plane, the driving gear and the driven gear further comprise an extrusion gear, a connecting part and a thrust gear, the extrusion gear is arranged at one end of the connecting part, the driving gear is arranged at the other end of the connecting part, and the extrusion gear, the connecting part and the thrust gear are of an integrated structure. When the extruder works and consumables deviate or are obliquely inserted for feeding, the movable gear is effectively and directly kept unchanged, and the deviation and slipping problems can be well corrected; meanwhile, it can be guaranteed that the thrust gear cannot fall off, so that the extrusion speed and the discharging amount are kept consistent, uneven discharging is completely avoided, and the defects that the surface of a printed piece is not smooth enough and other printing defects exist can be overcome.

Description

Technical Field

[0001] This utility model belongs to the technical field of 3D printing, specifically relating to an extruder gear structure for a 3D printer. Background Technology

[0002] 3D printing, also known as additive manufacturing, is a technology that has emerged in recent years. It involves adding materials layer by layer based on 3D CAD data to create solid parts. From its early days as a rapid prototyping technology to its current widespread applications, 3D printing technology is used in design and manufacturing fields such as jewelry design, footwear design and manufacturing, industrial design, architectural design, engineering design and construction, and automotive design and manufacturing, as well as in medical fields such as aerospace and dentistry.

[0003] In 3D printing, an important piece of equipment is the extruder, and the core component of the extruder is the gear. In the working device of a traditional extruder ( Figure 1 As shown, during the extrusion process, the extrusion gear and consumable may slip or jam. At the same time, in the working device of a traditional extruder, the rotation speed may be inconsistent due to the misalignment between the extrusion gear and the rotating shaft. This misalignment leads to uneven material output, resulting in an uneven surface of the printed parts and other printing defects. Utility Model Content

[0004] To address the aforementioned issues, the primary objective of this invention is to provide a gear structure for a 3D printer extruder. This gear structure features a flat-bottomed, wide-section extrusion gear that effectively keeps the moving gear constant during extruder operation. This effectively corrects slippage and offset issues, ensuring consistent extrusion speed and output, completely preventing uneven output, and resolving problems such as insufficient surface smoothness of printed parts and other printing defects.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows.

[0006] A gear structure for a 3D printer extruder includes a driving gear and a driven gear, wherein...

[0007] The driving gear and the driven gear are flat-bottomed, wide-sectioned gears. The flat-bottomed, wide-sectioned gear has a flat end face and the peripheral cross-section is formed by two arc surfaces connected together. That is, the peripheral cross-section is formed by two arc surfaces with a certain curvature connected together, thus having a wider cross-section. In this way, when the extrusion gear is working in the extruder, if the consumable material is deviated or obliquely inserted into the feed, the effective driving gear remains unchanged, which can effectively correct the deviation and slippage problem.

[0008] The gear structure of the extruder of the 3D printer comprises a driving gear, a connecting part and a thrust gear, the connecting part has the extruding gear at one end and the driving gear at the other end, the extruding gear, the connecting part and the thrust gear are integrated to maintain stability and ensure the concentricity after assembly; wherein the end surface of the extruding gear of the gear is flat, and the peripheral cutting surface is formed by two arc surfaces, which can ensure that the thrust gear does not fall off, so that the extrusion speed and the discharge amount are consistent, the uneven discharge is completely avoided, and the surface of the printed part is not smooth and other printing defects are solved.

[0009] Further, the length of the cutting surface of the gear is one fourth of the diameter of the extruding gear.

[0010] Further, the diameter of the gear is 12mm, and the arc of each cutting surface of the two cutting surfaces of the gear is 3.07-3.33mm (error 0.8). The cooperation of the arc and the height of the cutting surface makes the gear have a wide cutting surface, so that the extrusion speed and the discharge amount are consistent.

[0011] Further, the surface of the gear is coated with RNC, so that the surface hardness is higher and the wear resistance is greatly improved.

[0012] Further, the coaxiality of the gear is controlled to be 0.01-0.02mm, so that the extrusion speed and the discharge amount are consistent.

[0013] Compared with the prior art, the technical effects of the present application are as follows:

[0014] The gear structure of the extruder of the 3D printer realized by the present application is a gear with a flat bottom and a wide cutting surface, which has a wide cutting surface, so that when the consumables are offset or inserted obliquely during the operation of the extruder, the effective gear remains unchanged, and the offset and slipping problems can be well corrected.

[0015] Meanwhile, the integrated structure of the gear can ensure the concentricity after assembly and will not produce debris, and can ensure that the thrust gear will not fall off, so that the extrusion speed and the discharge amount are consistent, the uneven discharge is completely avoided, and the surface of the printed part is not smooth and other printing defects are solved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the gear structure of the prior art.

[0017] Figure 2 is a schematic view of the structure realized by the present application.

[0018] Figure 3 is a schematic view of the gear structure of the prior art.

[0019] Figure 4 This is an assembly diagram of the moving gear and driving component realized by this utility model.

[0020] Figure 5 This is a schematic diagram of the gear structure implemented by this utility model.

[0021] Figure 6 This is a perspective view of the gear structure implemented by this utility model.

[0022] Figure 7 This is a front view of the gear structure implemented by this utility model.

[0023] Figure 8 yes Figure 7 A magnified view of part A in the middle.

[0024] Figure descriptions: 1. Driving component; 2. Moving gear; 3. Driven gear; 4. Fixing component; 5. Extruded material; 21. Moving gear extrusion gear; 22. Moving gear connecting part; 23. Moving gear thrust gear; 31. Driven gear extrusion gear; 32. Driven gear connecting part; 33. Driven gear thrust gear. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] Figure 2 As shown, this utility model discloses a gear structure for a 3D printer extruder, which mainly includes a driving gear 2 and a driven gear 3. The driving gear 2 is mounted on the driving component 1 and is fixed by a fixing component 4.

[0027] Combination Figures 3-5 As shown, the moving gear 2 further includes a moving gear extrusion gear 21, a moving gear connecting part 22, and a moving gear thrust gear 23. The moving gear connecting part 22 has the moving gear extrusion gear 21 at one end and the moving gear drive gear 23 at the other end. At the same time, the moving gear extrusion gear 21, the moving gear connecting part 22, and the moving gear thrust gear 23 are integrated into one structure to maintain stability and effectively ensure concentricity after assembly.

[0028] From the gear 3 contains from the gear extrusion gear 31, from the gear connecting part 32 and from the gear thrust gear 33, wherein, from the gear connecting part 32 one end has from the gear extrusion gear 31, the other end has from the gear drive gear 33;At the same time, from the gear extrusion gear 31, from the gear connecting part 32 and from the gear thrust gear 33 are integrated structure, to maintain stability, can effectively guarantee the concentricity after assembly. The pinion gear extrusion gear 21 corresponds to the pinion gear extrusion gear 31, and the pinion gear thrust gear 23 is engaged with the pinion gear thrust gear 33. In this way, the concentricity after assembly can be ensured without generating debris, and the thrust gear can be ensured not to fall off, so that the extrusion speed and the discharge amount remain consistent, completely avoiding uneven discharge, and the surface of the printed part is not smooth and other printing defects.

[0029] Combination Figure 8 As shown, in order to better solve the problem of uneven discharge when extruding the consumables, the extrusion pinion gear 2 and the pinion gear 3 are flat bottom wide section gears. Specifically, the flat bottom wide section is that the end face of the gear is flat, and the peripheral section of the pinion gear extrusion gear 21 and the pinion gear extrusion gear 31 is connected by two arc surfaces, that is, the peripheral section is connected by two arc surfaces with a certain arc, so as to have a wide section. In this way, when the consumables are offset or obliquely inserted into the extruder during the extrusion of the extrusion gear, the effective pinion gear remains unchanged, and the offset slip problem can be well corrected.

[0030] Generally, in the pinion gear 2 and the pinion gear 3, the length of the section is one fourth of the diameter of the extrusion gear.

[0031] A specific embodiment is that the diameter of the pinion gear and the pinion gear is 12mm, and the arc of each section of the pinion gear and the pinion gear is 3.07-3.33mm. The cooperation of the section arc and the height makes the gear have a good wide section, so as to stably and consistently maintain the extrusion speed and the discharge amount.

[0032] Usually, RNC coating is used on the surface of the pinion gear and the pinion gear to improve the surface hardness and greatly improve the wear resistance.

[0033] In order to maintain the consistency of the extrusion speed and the discharge amount, the coaxiality of the pinion gear and the pinion gear is controlled to be 0.01-0.02mm.

[0034] Working principle: combination Figure 6 , 7As shown, the driving gear 1 drives the movable gear 2 to rotate, and since the movable gear thrust gear 23 of the movable gear 2 meshes with the from gear thrust gear 33, the movable gear 2 drives the from gear 3 to rotate at the same time, so that the extrusion material 5 is extruded from between the movable gear extrusion gear 21 and the from gear extrusion gear 31. Since the movable gear 2 and the from gear 3 are integrally designed, when the consumables are offset or obliquely inserted during the operation of the extruder, the effective movable gear remains unchanged, which can well correct the offset and slipping problem; and the concentricity after assembly is ensured without generating debris, and the thrust gear cannot fall off, so that the extrusion speed and the output are kept consistent.

[0035] In summary, the 3D printer extruder gear structure of the present application has a movable gear and a from gear with a flat bottom and a wide cutting surface, which has a wide cutting surface. When the consumables are offset or obliquely inserted during the operation of the extruder, the effective movable gear remains unchanged, which can well correct the offset and slipping problem; and the movable gear and the from gear are integrally structured, which can ensure the concentricity after assembly without generating debris, and the thrust gear cannot fall off, so that the extrusion speed and the output are kept consistent, completely avoiding uneven output, and solving the problem of not smooth enough surface of the printed part and other printing defects.

[0036] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A 3D printer extruder gear structure comprising a driving gear and a driven gear, characterized in that: The driving gear and driven gear are flat-bottom wide-section gears, the flat-bottom wide-section gear has flat ends and a circumferential section formed by two arc surfaces. The driving gear and driven gear further comprise an extrusion gear, a connecting part and a thrust gear, one end of the connecting part is provided with the extrusion gear, the other end is provided with the driving gear, the extrusion gear, the connecting part and the thrust gear are integrated, the end surface of the extrusion gear of the driving gear and the driven gear is flat, and the circumferential section is formed by two arc surfaces.

2. The 3D printer extruder gear structure of claim 1, wherein: The length of the circumferential section of the driving gear and the driven gear is one fourth of the diameter of the extrusion gear.

3. The 3D printer extruder gear structure of claim 2, wherein: The diameter of the driving gear and the driven gear is 12 mm, and the arc of each circumferential section of the driving gear and the driven gear is 3.07-3.33 mm.

4. The 3D printer extruder gear structure of claim 1, wherein: The surface of the driving gear and the driven gear is provided with an RNC coating.

5. The 3D printer extruder gear structure of claim 1, wherein: The coaxiality of the driving gear and the driven gear is controlled to be 0.01-0.02 mm.

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