3D printer consumable extrusion device

Abstract

The utility model relates to the technical field of 3D printing, in particular to a 3D printer consumable extrusion device which comprises an installation back plate, a driving mechanism is arranged on one side of the installation back plate, a transmission arm is movably installed on the side, close to the driving mechanism, of the installation back plate, and a plurality of guide rods are movably sleeved with the transmission arm. The end of the guide rod is in threaded connection with a transmission back plate, a driven mechanism matched with the driving mechanism is arranged on the transmission back plate, and the driving mechanism and the driven mechanism are the same in structure. According to the 3D printer consumable extrusion device designed by the utility model, the two groups of synchronous transmission toothed belts matched with each other are arranged, and the clamping concave surfaces matched with the linear consumables are formed in the synchronous transmission toothed belts, so that when the linear consumables are extruded, the linear consumables are clamped in the two groups of clamping concave surfaces matched with each other; the contact area of the linear consumables and the synchronous transmission toothed belt is large, and it is guaranteed that the synchronous transmission toothed belt can apply large friction force to the linear consumables.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, in particular to a consumable material extrusion device for a 3D printer. Background Art

[0002] 3D printer, also known as three-dimensional printer, is a kind of machine that uses cumulative manufacturing technology, that is, rapid prototyping technology. It is a machine that uses digital model files as the basis, and uses special wax materials, powdered metals or plastics and other adhesive materials to print layers of adhesive materials to create three-dimensional objects. In recent years, 3D printers have been used to manufacture various products.

[0003] The feeding device is a key component of a 3D printer, used to transfer 3D printing consumables to the extruder. The 3D printer feeding device usually transfers linear consumables to the extruder through consumable extrusion wheels. Specifically, a gap is maintained between the circumferences of the two consumable extrusion wheels, and the consumables are clamped in the gap. The two consumable extrusion wheels rotate, and the consumable extrusion wheels extrude the consumables through the friction force along the tangential direction of their circumferential surfaces, so as to form pressure on the molten consumables in the extruder, so that the molten consumables are continuously ejected to complete the printing operation. Figure 7 As shown, the 3D printer consumables extrusion wheel in the prior art has a plurality of anti-skid stripes evenly arranged along the axial direction on its circumferential surface to increase the tangential friction force of its circumferential surface on the linear consumables, but the friction force of the circumferential surface of the extrusion wheel on the linear consumables along the axial direction is small. In the process of conveying the consumables, the linear consumables are very easy to slip along the axial direction of the extrusion wheel and deviate in the axial direction of the extrusion wheel, resulting in poor guidance of the extrusion wheel and unstable conveying force of the linear consumables, thereby reducing the printing accuracy of the 3D printer. For this reason, we propose a 3D printer consumables extrusion device to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a 3D printer consumable material extrusion device.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a 3D printer consumables extrusion device, comprising a mounting back plate, a driving mechanism is arranged on one side of the mounting back plate, a transmission arm is movably mounted on the side of the mounting back plate close to the driving mechanism, and a plurality of guide rods are movably sleeved in the transmission arm, the ends of the guide rods are threadedly connected with a transmission back plate, and a driven mechanism cooperating with the driving mechanism is arranged on the transmission back plate, the driving mechanism and the driven mechanism have the same structure, both including a synchronous transmission toothed belt, a clamping concave surface, anti-slip stripes and two sets of synchronous transmission gears, linear consumables are clamped between the driving mechanism and the driven mechanism, a compression spring is movably sleeved on the outside of the guide rod, a servo motor transmission-connected to the driving mechanism is fixedly mounted on the side of the mounting back plate away from the driving mechanism, and an adjusting screw cooperating with the transmission arm is threadedly connected on the mounting back plate.

[0006] As a further description of the above technical solution: the two groups of synchronous transmission gears in the driving mechanism are movably installed on the mounting back plate, the two groups of synchronous transmission gears in the driven mechanism are movably installed on the transmission back plate, the synchronous transmission toothed belt is meshingly sleeved on the outside of the synchronous transmission gear, and the synchronous transmission gear and the synchronous transmission toothed belt are driven by teeth to avoid slipping of the transmission of the two, thereby achieving smooth transportation of linear consumables.

[0007] As a further description of the above technical solution: the outside of the synchronous transmission toothed belt is provided with a clamping concave surface that cooperates with the linear consumable, and the linear consumable is clamped in the clamping concave surface at the long side of the synchronous transmission toothed belt. The surface of the clamping concave surface is provided with dense anti-slip stripes. The contact area between the linear consumable and the synchronous transmission toothed belt is large, ensuring that the synchronous transmission toothed belt can exert a large friction force on the linear consumable. At the same time, the clamping concave surface can also restrict the linear consumable to prevent the linear consumable from shifting during transportation.

[0008] As a further description of the above technical solution: a guide rail is fixedly installed on the side of the mounting backplate close to the driven mechanism, and a guide sleeve that cooperates with the guide rail is fixedly installed on the transmission arm and the transmission backplate. The guide sleeve cooperates with the guide rail to limit the position of the transmission backplate or the transmission arm, thereby ensuring the stability of the transmission backplate and the transmission arm during movement.

[0009] As a further description of the above technical solution: the number of the guide rods is 2-6 groups, the compression spring outside the guide rod is located between the transmission arm and the transmission back plate, and the compression spring can always apply elastic force to the transmission back plate. By applying elastic force to the transmission back plate through the compression spring, the driven mechanism can apply clamping force to the linear consumable, thereby increasing the friction force at the contact position between the linear consumable and the synchronous transmission toothed belt, thereby improving the conveying effect of the linear consumable.

[0010] As a further description of the above technical solution: a mounting plate cooperating with an adjusting screw is provided on the mounting back plate, and the end of the adjusting screw is rotatably connected to the transmission arm. Rotating the adjusting screw drives the transmission arm to move downward, and the position of the transmission back plate and the driven mechanism is adaptively adjusted, so that the driving mechanism and the driven mechanism can cooperate to transport linear consumables of different diameters.

[0011] As a further description of the above technical solution: the output shaft of the servo motor is fixedly connected to any synchronous transmission gear in the driving mechanism, and the two sets of synchronous transmission gears in the driving mechanism are connected to the servo motor through synchronous transmission toothed belts. The servo motor can drive the synchronous transmission gear on the output shaft to rotate, thereby driving the synchronous transmission toothed belt to rotate, providing power for the transportation and extrusion of linear consumables.

[0012] The utility model has the following beneficial effects:

[0013] The 3D printer consumables extrusion device designed by the utility model is provided with two sets of mutually matched synchronous transmission toothed belts, and a clamping concave surface matched with the linear consumables is provided on the synchronous transmission toothed belts. When the linear consumables are extruded, the linear consumables are clamped in the two sets of mutually matched clamping concave surfaces, and the contact area between the linear consumables and the synchronous transmission toothed belts is large, so that the synchronous transmission toothed belts can apply a large friction force to the linear consumables, the transmission force of the linear consumables is stable, and it is not easy to slip and deviate along the axial direction of the extrusion wheel, thereby improving the printing accuracy of the 3D printer.

[0014] The utility model designs a 3D printer consumable extrusion device, in which the driven mechanism as a whole is movably mounted on the mounting back plate through the transmission back plate, and an elastic force is applied to the transmission back plate through a compression spring, so that the driven mechanism can apply a clamping force to the linear consumable, further increasing the friction force at the contact position between the linear consumable and the synchronous transmission toothed belt, ensuring that the linear consumable can be smoothly transmitted, and improving the printing accuracy of the 3D printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model after overall assembly;

[0016] Figure 2 This is a schematic diagram of the structure of the back of the back plate installed in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the driving mechanism of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the installation position of the driven mechanism of the utility model;

[0019] Figure 5 This is a structural schematic diagram of the installation position of the transmission back plate of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the connection between the transmission arm and the adjusting screw rod of the utility model;

[0021] Figure 7 It is a schematic diagram of the structure of the consumable extrusion wheel in the prior art.

[0022] Legend:

[0023] 1. Install the back plate; 2. Drive mechanism; 21. Synchronous transmission gear; 22. Synchronous transmission toothed belt; 23. Snap-on concave surface; 24. Anti-slip stripes; 3. Transmission back plate; 4. Follower mechanism; 5. Linear consumables; 6. Guide sleeve; 7. Transmission arm; 8. Guide rod; 9. Compression spring; 10. Adjustment screw; 11. Servo motor; 12. Guide rail. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Please refer to Figure 1-6 The utility model provides a technical solution: a 3D printer consumable extrusion device, comprising a mounting back plate 1, a driving mechanism 2 is arranged on one side of the mounting back plate 1, a transmission arm 7 is movably mounted on one side of the mounting back plate 1 close to the driving mechanism 2, and a plurality of guide rods 8 are movably sleeved in the transmission arm 7, a transmission back plate 3 is threadedly connected to the end of the guide rod 8, and a driven mechanism 4 cooperating with the driving mechanism 2 is arranged on the transmission back plate 3, the driving mechanism 2 and the driven mechanism 4 have the same structure, both including a synchronous transmission toothed belt 22, a clamping concave surface 23, an anti-slip stripe 24 and two groups of synchronous transmission gears 21, a linear consumable 5 is clamped between the driving mechanism 2 and the driven mechanism 4, two groups of mutually cooperating synchronous transmission toothed belts 22 are arranged, and a clamping concave surface 23 cooperating with the linear consumable 5 is provided on the synchronous transmission toothed belt 22, and the linear consumable 5 is clamped in the two groups of mutually cooperating clamps In the concave surface 23, the contact area between the linear consumable 5 and the synchronous transmission toothed belt 22 is relatively large, ensuring that the synchronous transmission toothed belt 22 can apply a large friction force to the linear consumable 5. The external movable sleeve of the guide rod 8 is provided with a compression spring 9, and the compression spring 9 applies elastic force to the transmission back plate 3, so that the driven mechanism 4 can apply a clamping force to the linear consumable 5, thereby increasing the friction force at the contact position between the linear consumable 5 and the synchronous transmission toothed belt 22, and ensuring that the linear consumable 5 can be smoothly transmitted. A servo motor 11 connected to the drive mechanism 2 is fixedly installed on the side of the mounting back plate 1 away from the drive mechanism 2, and an adjusting screw 10 cooperating with the transmission arm 7 is threadedly connected to the mounting back plate 1. Rotating the adjusting screw 10 drives the transmission arm 7 to move downward, and adaptively adjusts the position of the transmission back plate 3 and the driven mechanism 4, so that the drive mechanism 2 and the driven mechanism 4 can clamp linear consumables 5 of different diameters.

[0026] As a further implementation plan of the above technical scheme: the two groups of synchronous transmission gears 21 in the driving mechanism 2 are movably mounted on the mounting back plate 1, the two groups of synchronous transmission gears 21 in the driven mechanism 4 are movably mounted on the transmission back plate 3, and the synchronous transmission toothed belt 22 is meshingly sleeved on the outside of the synchronous transmission gear 21. The synchronous transmission toothed belt 22 is supported by the two groups of synchronous transmission gears 21 to ensure the stability of the synchronous transmission toothed belt 22 during rotation. At the same time, the synchronous transmission gear 21 and the synchronous transmission toothed belt 22 are transmitted through teeth to avoid slipping of the transmission between the two. According to needs, more synchronous transmission gears 21 can be added to the synchronous transmission toothed belt 22 to achieve stable support for the middle part of the synchronous transmission toothed belt 22.

[0027] As a further implementation scheme of the above technical scheme: a clamping concave surface 23 cooperating with the linear consumable 5 is provided on the outside of the synchronous transmission toothed belt 22. After the linear consumable 5 is clamped in the clamping concave surface 23, the clamping concave surface 23 can also prevent the linear consumable 5 from shifting during the transportation process. The linear consumable 5 is clamped in the clamping concave surface 23 at the long side position of the synchronous transmission toothed belt 22. The surface of the clamping concave surface 23 is provided with dense anti-slip stripes 24. The contact area between the linear consumable 5 and the synchronous transmission toothed belt 22 is large, ensuring that the synchronous transmission toothed belt 22 can apply a large friction force to the linear consumable 5. The transmission force of the linear consumable 5 is stable, and it is not easy to slip and shift along the axial direction of the extrusion wheel, thereby improving the printing accuracy of the 3D printer.

[0028] As a further implementation scheme of the above technical scheme: a guide rail 12 is fixedly installed on the side of the installation back plate 1 close to the driven mechanism 4, and a guide sleeve 6 that cooperates with the guide rail 12 is fixedly installed on the transmission arm 7 and the transmission back plate 3. The position of the transmission back plate 3 or the transmission arm 7 is limited by the cooperation between the guide sleeve 6 and the guide rail 12 to ensure the stability of the transmission back plate 3 and the transmission arm 7 during movement, and at the same time ensure that the driven mechanism 4 can accurately cooperate with the driving mechanism 2 to achieve stable transportation of the linear consumables 5.

[0029] As a further implementation scheme of the above technical scheme: the number of guide rods 8 is 2-6 groups, and the position of the transmission back plate 3 is limited by the guide rods 8 to ensure that the connection between the transmission back plate 3 and the transmission arm 7 is stable, and at the same time, the transmission back plate 3 can be stably adjusted. The compression spring 9 outside the guide rod 8 is located between the transmission arm 7 and the transmission back plate 3. The compression spring 9 can always apply elastic force to the transmission back plate 3. By applying elastic force to the transmission back plate 3 through the compression spring 9, the driven mechanism 4 can apply clamping force to the linear consumable 5, thereby further increasing the friction force at the contact position between the linear consumable 5 and the synchronous transmission toothed belt 22.

[0030] As a further implementation scheme of the above technical scheme: a mounting plate cooperating with the adjusting screw 10 is provided on the mounting back plate 1, and the end of the adjusting screw 10 is rotatably connected to the transmission arm 7. Rotating the adjusting screw 10 drives the transmission arm 7 to move downward, and the position of the transmission back plate 3 and the driven mechanism 4 is adaptively adjusted, so that the driving mechanism 2 and the driven mechanism 4 can clamp linear consumables 5 of different diameters.

[0031] As a further implementation scheme of the above technical scheme: the output shaft of the servo motor 11 is fixedly connected to any synchronous transmission gear 21 in the driving mechanism 2, and the two sets of synchronous transmission gears 21 in the driving mechanism 2 are connected to the servo motor 11 through a synchronous transmission belt 22. The servo motor 11 is a common prior art, which can drive the synchronous transmission gear 21 on the output shaft to rotate, thereby driving the synchronous transmission belt 22 to rotate, thereby realizing stable transportation of the linear consumable 5.

[0032] Working principle:

[0033] When using the utility model, the linear consumable 5 is clamped in the clamping concave surface 23 of the surface of the two sets of synchronous transmission toothed belts 22 on the driving mechanism 2 and the driven mechanism 4. According to the diameter value of the linear consumable 5, the adjusting screw 10 is rotated to drive the transmission arm 7 to move downward, so as to adaptively adjust the position of the transmission back plate 3 and the driven mechanism 4, so that the driving mechanism 2 and the driven mechanism 4 can clamp the linear consumable 5 of different diameters, and the synchronous transmission gear 21 on the output shaft is driven to rotate by the servo motor 11, and the synchronous transmission toothed belt 22 is driven to rotate, and the friction between the linear consumable 5 and the synchronous transmission toothed belt 22 is driven. The linear consumable 5 moves, and the linear consumable 5 contacts the long side of the synchronous transmission toothed belt 22 and is clamped in the clamping concave surface 23 on the surface of the synchronous transmission toothed belt 22. At the same time, anti-slip stripes 24 are arranged on the surface of the clamping concave surface 23 to ensure that the synchronous transmission toothed belt 22 can apply a large friction force to the linear consumable 5, thereby realizing smooth transportation of the linear consumable 5. At the same time, elastic force is applied to the transmission back plate 3 through the compression spring 9, so that the synchronous transmission toothed belt 22 on the driven mechanism 4 applies a clamping force to the linear consumable 5, thereby further improving the friction between the linear consumable 5 and the synchronous transmission toothed belt 22, thereby improving the 3D printing accuracy.

[0034] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printer consumable material extrusion device, comprising a mounting back plate (1), characterized in that: A driving mechanism (2) is arranged on one side of the mounting back plate (1); a transmission arm (7) is movably mounted on a side of the mounting back plate (1) close to the driving mechanism (2); a plurality of guide rods (8) are movably mounted in the transmission arm (7); the ends of the guide rods (8) are threadedly connected to a transmission back plate (3); and a driven mechanism (4) cooperating with the driving mechanism (2) is arranged on the transmission back plate (3); the driving mechanism (2) and the driven mechanism (4) have the same structure and both include a synchronous transmission toothed belt (22). , a snap-fitting concave surface (23), anti-slip stripes (24) and two sets of synchronous transmission gears (21); a linear consumable (5) is clamped between the driving mechanism (2) and the driven mechanism (4); a compression spring (9) is mounted on the outer movable sleeve of the guide rod (8); a servo motor (11) connected to the driving mechanism (2) is fixedly mounted on the side of the mounting back plate (1) away from the driving mechanism (2); and an adjusting screw (10) that cooperates with the transmission arm (7) is threadedly connected on the mounting back plate (1).

2. A 3D printer consumables extrusion device according to claim 1, characterized in that: The two sets of synchronous transmission gears (21) in the driving mechanism (2) are movably mounted on the mounting back plate (1), the two sets of synchronous transmission gears (21) in the driven mechanism (4) are movably mounted on the transmission back plate (3), and the synchronous transmission toothed belt (22) is meshedly sleeved on the outside of the synchronous transmission gears (21).

3. A 3D printer consumables extrusion device according to claim 1, characterized in that: The synchronous transmission toothed belt (22) is provided with a clamping concave surface (23) cooperating with the linear consumable (5) on the outside, the linear consumable (5) is clamped in the clamping concave surface (23) at the long side of the synchronous transmission toothed belt (22), and the surface of the clamping concave surface (23) is provided with dense anti-slip stripes (24).

4. A 3D printer consumables extrusion device according to claim 1, characterized in that: A guide rail (12) is fixedly mounted on one side of the mounting back plate (1) close to the driven mechanism (4), and a guide sleeve (6) cooperating with the guide rail (12) is fixedly mounted on both the transmission arm (7) and the transmission back plate (3).

5. A 3D printer consumables extrusion device according to claim 1, characterized in that: The number of the guide rods (8) is 2-6 groups, and the compression spring (9) outside the guide rods (8) is located between the transmission arm (7) and the transmission back plate (3), and the compression spring (9) can always apply elastic force to the transmission back plate (3).

6. A 3D printer consumables extrusion device according to claim 1, characterized in that: The mounting back plate (1) is provided with a mounting plate that matches the adjusting screw (10), and the end of the adjusting screw (10) is rotatably connected to the transmission arm (7).

7. A 3D printer consumables extrusion device according to claim 1, characterized in that: The output shaft of the servo motor (11) is fixedly connected to any one of the synchronous transmission gears (21) in the driving mechanism (2), and the two sets of synchronous transmission gears (21) in the driving mechanism (2) are transmission-connected to the servo motor (11) via a synchronous transmission toothed belt (22).

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