Remote extruder applied to 3D printer

Abstract

The utility model discloses a remote extruder applied to a 3D printer. The remote extruder comprises a mounting base, a motor, an extrusion wheel, a fixing base, a pressing wheel, a magnet and a magnetic encoder, the motor is mounted on the mounting base, and the extrusion wheel is fixedly connected with an output shaft of the motor and rotates along with rotation of the output shaft of the motor; in the working process, the motor drives the extrusion wheel to rotate, the wire is extruded through friction among the extrusion wheel, the pressing wheel and the wire, and meanwhile the pressing wheel is driven to rotate; the pressing wheel is installed on the magnet base, the magnet is installed on the magnet base, the magnet rotates along with the magnet base, the extrusion condition of the wire can be controlled through the magnetic encoder, and the situations that the wire is not extruded and the extrusion speed is not matched are avoided. The remote extruder applied to the 3D printer provided by the utility model can adapt to wires with more wire diameters, can detect the feeding condition of the extruder, effectively avoids the occurrence of printing faults, and better completes the printing work.

Description

Technical Field

[0001] The utility model particularly relates to a remote extruder applied to a 3D printer, belonging to the technical field of 3D printing equipment. Background Art

[0002] With the rapid development of science and technology, 3D printing technology, as a key component of modern manufacturing, has gained widespread application and recognition worldwide. 3D printing, also known as additive manufacturing, constructs three-dimensional objects by gradually adding materials. Currently, the technology is widely used in a variety of fields, including aerospace, automotive manufacturing, medical devices, architectural design, and consumer goods manufacturing.

[0003] The extrusion principle of a 3D printer is to feed the filament into a heating block through an extruder. After the heating filament melts, the liquid filament flows out of the nozzle hole and solidifies at the designated position, building the printed part layer by layer. The extruder needs to precisely control the length of the extruded wire and is one of the core components of a 3D printer. The extruder is divided into a remote extruder and a short-range extruder. The remote extruder is separated from the nozzle and feeds the nozzle through a Teflon tube. Since the remote extruder is separated from the nozzle, it is easier to maintain. At the same time, the nozzle weight is reduced, the inertia is also small, the control is more precise, and the speed is faster. The existing remote extruder is mainly composed of a toothed feed shaft and a pinch wheel. The feed shaft is connected to the motor. When in use, the filament is clamped between the feed wheel and the pinch wheel. The feed wheel rotates to deliver the filament to the heater. However, during use, the feed wheel often rotates normally but the filament cannot be delivered due to reasons such as filament knotting, material tray jamming or nozzle clogging. At the same time, the extrusion rate and printing rate may not match, resulting in printing faults. At the same time, printers often need to print objects of different materials with different filament diameters. Existing extruders often cannot meet the needs of filaments of various diameters. Utility Model Content

[0004] The main purpose of the utility model is to provide a remote extruder for 3D printers. This extruder can adapt to wires of more wire diameters, and can detect the feeding situation of the extruder, effectively avoid the occurrence of printing faults, better complete the printing work, and thus overcome the shortcomings of the existing technology.

[0005] In order to achieve the above-mentioned purpose of the utility model, the technical solutions adopted by the utility model include:

[0006] The present invention provides a remote extruder for a 3D printer, comprising:

[0007] A motor and a wire extrusion structure, the wire extrusion structure comprising a fixed seat, an extrusion wheel, a pressure wheel, a wire input structure and a wire output structure, the fixed seat having a working chamber therein, the extrusion wheel and the pressure wheel being arranged in the working chamber, the extrusion wheel being fixedly connected to the output shaft of the motor and rotating synchronously with the output shaft, the pressure wheel being rotationally matched with the fixed seat, the wire input structure and the wire output structure being arranged on the fixed seat, the wire input structure and the wire output structure being oriented toward the wire channel between the extrusion wheel and the pressure wheel, the extrusion wheel and the pressure wheel extrude the wire by friction with the wire, and the pressure wheel being able to rotate driven by the friction between itself and the wire;

[0008] As well as, a signal transmitting mechanism and a speed detection mechanism, the signal transmitting mechanism is fixedly matched with the pinch wheel and rotates synchronously with the pinch wheel, the speed detection mechanism is fixedly matched with the fixed seat, the speed detection mechanism is used to monitor and obtain the speed V1 of the signal transmitting mechanism, the speed of the signal transmitting mechanism is equal to the speed of the pinch wheel, and the wire extrusion structure satisfies: the theoretical extrusion speed of the wire V2 = 2IIR1*V1, the speed of the extrusion wheel = the speed of the motor = V3 = V1*R1 / R2, R1 is the radius of the pinch wheel, and R2 is the radius of the extrusion wheel.

[0009] Furthermore, the axes of the pressing wheel and the extrusion wheel are arranged in parallel, and the circumferential side of at least one of the pressing wheel and the extrusion wheel is also provided with a continuous guide groove structure, and the guide groove structure between the pressing wheel and the extrusion wheel forms the wire channel.

[0010] Furthermore, the guide groove structure is an annular groove extending continuously along the circumference of the pressing wheel or the extrusion wheel.

[0011] Furthermore, the motor may be a stepping motor or the like.

[0012] In a more specific embodiment, the remote extruder applied to the 3D printer also includes: a first assembly base, the first assembly base is arranged in the working chamber and rotates with the fixed seat, the pressure wheel and the signal transmitting mechanism are fixedly arranged on the first assembly base, the first assembly base, the pressure wheel and the signal transmitting mechanism rotate synchronously, wherein the pressure wheel has no direct contact with the fixed seat.

[0013] Furthermore, the pressure wheel is fixedly sleeved on the first assembly base, the signal transmitting mechanism is fixedly arranged at one end of the first assembly base, and the speed detection mechanism is located in the working chamber and has no direct contact with the signal transmitting mechanism.

[0014] Furthermore, the pressing wheel is coaxially arranged with the first assembly base.

[0015] Furthermore, a receiving groove is provided at one end of the first assembly base, and the signal transmitting mechanism is fixedly disposed in the receiving groove and faces the speed detecting mechanism.

[0016] Furthermore, the rotation speed detection mechanism is fixedly arranged on the fixing seat, or the wire extrusion structure further includes a second assembly base, the second assembly base is fixedly connected to the fixing seat, and the rotation speed detection mechanism is fixedly installed on the second assembly base.

[0017] Furthermore, a buffer pad is provided between the fixing seat and the second assembly base.

[0018] Furthermore, the signal transmitting mechanism includes a magnet, and the rotation speed detecting mechanism includes a magnetic encoder.

[0019] In a more specific embodiment, the remote extruder applied to the 3D printer also includes: a pressure swing arm, a spring adjustment column, and a spring. The pressure swing arm is arranged in the working chamber, and the pressure swing arm is rotatably connected to the fixed seat via a hinge pin. The first assembly base is connected to the pressure swing arm via a bearing, and the spring adjustment column is threadedly connected to the fixed seat. At least part of the spring adjustment column is exposed outside the working chamber, and the spring is confined between the pressure swing arm and the spring adjustment column. The pressure swing arm can rotate around the hinge pin under the drive of the combined force of the external force and the elastic force of the spring, so that the gap width between the extrusion wheel and the pressure wheel changes accordingly.

[0020] Furthermore, the wire input structure includes a wire tube fixing column and a wire passing column, the wire passing column is fixed on the fixing seat, a part of the wire passing column extends into the working chamber, the wire tube fixing column is fixedly arranged on the wire passing column, and the wire tube fixing column and the wire passing column have wire channels that are interconnected and can allow wires to pass through.

[0021] Furthermore, the wire tube fixing column and the wire passing column are coaxially arranged.

[0022] Furthermore, a wire pipe fixing seat is fixedly provided on the outside of the fixing seat.

[0023] Furthermore, the wire output structure includes a quick-insert connector, which is fixed on the fixing seat.

[0024] In a more specific implementation scheme, the remote extruder applied to the 3D printer further includes: a mounting base, on which the motor and the fixing base are fixedly mounted.

[0025] Compared with the prior art, the advantages of the present invention include: the remote extruder applied to a 3D printer provided by the embodiment of the present invention improves the wire adaptability of the equipment, can extrude wires of different diameters, improves the passability of the wire, and greatly reduces the occurrence of wire slippage; and, the remote extruder applied to a 3D printer provided by the embodiment of the present invention can adjust the speed of the motor according to the feedback status of the magnetic encoder in accordance with actual production, thereby greatly improving printing efficiency. At the same time, once the extruder has an extrusion abnormality, a warning can be issued immediately and the printer equipment can be paused, which can effectively avoid the printer from working ineffectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the overall structure of a remote extruder applied to a 3D printer provided in a typical embodiment of the present invention;

[0028] Figure 2 This is an exploded diagram of the structure of a remote extruder used in a 3D printer provided in a typical embodiment of the present invention;

[0029] Figure 3 This is a schematic cross-sectional view of a remote extruder for a 3D printer provided in a typical embodiment of the present invention;

[0030] Figure 4 A schematic diagram of the internal partial structure of a remote extruder used in a 3D printer provided in a typical embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the internal partial structure of a remote extruder used in a 3D printer provided in a typical implementation case of the present utility model. DETAILED DESCRIPTION

[0032] In view of the shortcomings of the prior art, the inventors of this case have proposed the technical solution of the present utility model after long-term research and extensive practice. The following will further explain this technical solution, its implementation process and principles, etc. in conjunction with the accompanying drawings and specific implementation examples. Unless otherwise specified, the various functional components used in the embodiments of the present utility model are all known in the art and can be purchased commercially or obtained by processing using known methods in the art. In addition, the fixed connection and rotating connection mentioned in the embodiments of the present utility model can be achieved by structures or methods known in the art and will not be described in detail here.

[0033] Example

[0034] See also Figure 1 A remote extruder for a 3D printer includes a motor 20, a wire extrusion structure, and a mounting base 8. The motor 20 and the wire extrusion structure are fixed on the mounting base 8, which can be fixedly mounted on the printer table. The wire extrusion structure includes a fixing base 5, an extrusion wheel 12, a pinch wheel 4, a mounting base 8, a wire input structure, and a wire output structure. The fixing base 5 has a working chamber inside, and the extrusion wheel 12 and the pinch wheel 4 are arranged in the working chamber. The extrusion wheel 12 and the pinch wheel 4 are rotatably matched with the fixing base 5, that is, the extrusion wheel 12 and the pinch wheel 4 can rotate in the working chamber, and the axes of the extrusion wheel 12 and the pinch wheel 4 are arranged in parallel. A wire channel for the wire to pass through is formed between the rolling surfaces (i.e., the circumferential side surfaces) of the wheel 12 and the pressure wheel 4, wherein the extrusion wheel 12 is fixedly connected to the output shaft of the motor 10 and rotates synchronously with the output shaft, and the pressure wheel 4 rotates in coordination with the fixed seat 5. The extrusion wheel 12 and the pressure wheel 4 extrude the wire by friction with the wire, and the pressure wheel 4 can rotate driven by the friction between itself and the wire. The wire input structure and the wire output structure are fixed on the fixed seat 5. The wire input structure and the wire output structure correspond to the wire channel between the extrusion wheel 12 and the pressure wheel 4 respectively. The wire enters from the wire input structure and is output from the wire output structure after passing through the wire channel.

[0035] In this embodiment, the inlet and outlet of the wire input structure and the wire output structure are opposite to the wire channel between the extrusion wheel 12 and the pressure wheel 4. The wire input structure and the wire output structure can play a guiding role to facilitate threading. In this embodiment, the wire input structure includes a wire tube fixing column 10 and a wire passing column 11. The wire passing column 11 is fixed on the fixing seat 5. A part of the wire passing column 11 extends into the working chamber. The wire tube fixing column 10 is fixed on the wire passing column 11. The wire tube fixing column 10 and the wire passing column 11 have wire channels that are interconnected and can allow wires to pass through. Specifically, the wire tube fixing column 10 and the wire passing column 11 are coaxially arranged. In this embodiment, the wire output structure includes a quick-connect connector 19. The quick-connect connector 19 is fixed on the fixing seat 5. The quick-connect connector 19 also has a wire channel for wires to pass through. Preferably, a wire tube fixing seat 6 is also fixed on the outside of the fixing seat 5. The wire tube fixing seat 6 is used to fix the wiring harness of the encoder.

[0036] In this embodiment, a continuous guide groove structure is further provided on the circumferential side surface of at least one of the pressure wheel 4 and the extrusion wheel 12, and the guide groove structure between the pressure wheel 4 and the extrusion wheel 12 forms a wire channel; wherein, the guide groove structure is an annular groove extending continuously along the circumference of the pressure wheel 4 or the extrusion wheel 12.

[0037] In this embodiment, the remote extruder applied to the 3D printer further includes a signal transmitting mechanism 15 and a speed detecting mechanism 31. The signal transmitting mechanism 15 is fixedly matched with the pinch wheel 4 and rotates synchronously with the pinch wheel 4. The speed detecting mechanism 31 is fixedly matched with the fixing seat 5. The speed detecting mechanism 31 is used to monitor and obtain the speed V1 of the signal transmitting mechanism 15. The speed of the signal transmitting mechanism 15 is equal to the speed of the pinch wheel 4. In addition, the wire extrusion structure satisfies: the theoretical extrusion speed of the wire V2 = 2ΠR1*V1, the speed of the extrusion wheel 12 = the speed of the motor 20 = V3 = V1*R1 / R2, R1 is the radius of the pinch wheel 4, and R2 is the radius of the extrusion wheel 12. Specifically, the signal transmitting mechanism 15 includes a magnet, and the speed detecting mechanism 31 includes a magnetic encoder.

[0038] Specifically, the magnetic encoder can be used to determine the wire extrusion speed and the motor speed, so that the motor speed can be adjusted according to the actual production situation. At the same time, the motor speed and the actual speed of the pinch wheel can be used to determine whether the wire is slipping or there is no material, thereby avoiding ineffective operation of the printer. It is understandable that since the rotation of the pinch wheel is driven by the friction with the wire, once slippage or no material occurs, the pinch wheel will not rotate or rotate abnormally. In this way, the magnetic encoder can immediately detect the abnormality of wire extrusion, quickly issue a warning to indicate the abnormality, and suspend the printing of the printer, thereby avoiding ineffective operation of the printer.

[0039] In this embodiment, the wire extrusion structure also includes a first assembly base 3, which is arranged in the working chamber and rotates with the fixed base 5. The pressure wheel 4 and the signal transmitting mechanism 15 are fixedly arranged on the first assembly base 3. The first assembly base 3, the pressure wheel 4, and the signal transmitting mechanism 15 rotate synchronously, wherein the pressure wheel 4 has no direct contact with the fixed base 5. Specifically, the pressure wheel 4 is fixedly sleeved on the first assembly base 3, the signal transmitting mechanism 15 is fixedly arranged at one end of the first assembly base 3, and the speed detection mechanism 31 is located in the working chamber and has no direct contact with the signal transmitting mechanism 15. As a preferred solution, the pressure wheel 4 is coaxially arranged with the first assembly base 3. More specifically, a receiving groove is provided at one end of the first assembly base 3, and the signal transmitting mechanism 15 is fixedly arranged in the receiving groove and faces the speed detection mechanism 31.

[0040] In this embodiment, the speed detection mechanism 31 can be directly fixed on the fixed seat 5, and the speed detection mechanism 31 can be located in the working chamber, or the wire extrusion structure also includes a second assembly base 9, the second assembly base 9 is fixedly connected to the fixed seat 5, and the speed detection mechanism 31 is fixedly installed on the second assembly base 9 and is located in the working chamber, that is, it can be understood that in this solution, the fixed seat 5 is a semi-closed structure, the second assembly base 9 is fixedly connected to the fixed seat 5 and is correspondingly arranged in the open area of the fixed seat 5, and the working chamber can be formed by the fixed seat 5 and the second assembly base 9. Specifically, a buffer pad 13 can also be provided between the fixed seat 5 and the second assembly base 9 so that the fixed seat 5 and the second assembly base 9 can better achieve sealed assembly. Exemplarily, the fixed seat 5 and the second assembly base 9 can be fixedly assembled by screws or the like.

[0041] In this embodiment, please refer to Figure 2 one Figure 5The remote extruder applied to the 3D printer also includes a pressure swing arm, a spring adjustment column 7, and a spring 17. The pressure swing arm is arranged in the working chamber, and the pressure swing arm is rotatably connected to the fixed seat 5 via a hinge pin 16. The first assembly base 3 is connected to the pressure swing arm via a bearing 14, and the spring adjustment column 7 is threadedly connected to the fixed seat 5. At least part of the spring adjustment column 7 is exposed outside the working chamber. The spring 17 is confined between the pressure swing arm and the spring adjustment column 7. The pressure swing arm can rotate around the hinge pin 16 under the combined force of the external force and the elastic force of the spring 17, so that the gap width between the extrusion wheel 12 and the pressure wheel 4 changes accordingly. Specifically, an adjustment hole is provided on the fixing seat 5, and the spring adjustment column 7 is provided in the adjustment hole. The adjustment hole is a threaded hole. By screwing the spring adjustment column 7, the spring adjustment column 7 can be moved along the adjustment hole, thereby changing the pressure on the spring 17, and then the pressure swing arm rotates around the hinge pin 16, thereby changing the gap width between the extrusion wheel 12 and the pressure wheel 4, so that the pressure wheel 4 presses the wire. By controlling the gap size between the extrusion wheel 12 and the pressure wheel 4, wires of different wire diameters can pass through. At the same time, adjusting the friction between the wire and the pressure wheel 4 can reduce the occurrence of slippage during wire extrusion. It should be noted that one end of the spring 17 is connected to the pressure swing arm, and the other end can be sleeved on the spring adjustment column 7. Of course, the spring 17 can also be restricted between the pressure swing arm and the spring adjustment column 7 by other limiting structures.

[0042] It should be noted that the connection between the first assembly base 3 and the pressure swing arm via the bearing 14 specifically means that the first assembly base 3 is fixedly connected to the inner ring of the bearing 14 , and the pressure swing arm is fixedly connected to the outer ring of the bearing 14 .

[0043] In this embodiment, the pressure swing arm may include a pressure swing arm cover 1 and a pressure swing arm seat 2. The pressure swing arm cover 1 and the pressure swing arm seat 2 are fixed by connecting parts such as screws. Of course, the pressure swing arm cover 1 and the pressure swing arm seat 2 may also be integrated.

[0044] The embodiment of the present invention provides a remote extruder for a 3D printer, which improves the wire adaptability of the device, can extrude wires of different diameters, improves the passability of the wire, and greatly reduces the occurrence of wire slippage; and the embodiment of the present invention provides a remote extruder for a 3D printer, which can adjust the speed of the motor according to the feedback status of the magnetic encoder in accordance with actual production, greatly improving the printing efficiency. At the same time, once the extruder has an extrusion abnormality, it can immediately issue a warning and pause the printer device, effectively avoiding ineffective operation of the printer.

[0045] An embodiment of the present invention provides a remote extruder for a 3D printer, in which a magnet is provided on a pinch wheel, and a magnetic encoder is provided to match the magnet. The magnetic encoder can be used to determine the wire extrusion speed and the motor speed, so that the motor speed can be adjusted according to actual production conditions. At the same time, whether the wire is slipping or out of material can be determined based on the motor speed and the actual speed of the pinch wheel, thereby effectively avoiding ineffective operation of the printer.

[0046] An embodiment of the present invention provides a remote extruder for a 3D printer, wherein a pinch wheel is arranged on a pressure swing arm, one end of which is fixed and the other end is rotatable. In this way, the pinch force of the pinch wheel can be adjusted by a spring, thereby allowing wires of various diameters to pass through. In addition, by adjusting the pinch force, the occurrence of wire extrusion slippage can be reduced.

[0047] It should be understood that the above embodiments are merely illustrative of the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A remote extruder for a 3D printer, characterized in that: include: A motor (20) and a wire extrusion structure, wherein the wire extrusion structure comprises a fixed seat (5), an extrusion wheel (12), a pressure wheel (4), a wire input structure and a wire output structure, wherein the fixed seat (5) has a working chamber inside, the extrusion wheel (12) and the pressure wheel (4) are arranged in the working chamber, the extrusion wheel (12) is fixedly connected to the output shaft of the motor (20) and rotates synchronously with the output shaft, the pressure wheel (4) rotates in coordination with the fixed seat (5), the wire input structure and the wire output structure are arranged on the fixed seat (5), the wire input structure and the wire output structure are oriented toward the wire channel between the extrusion wheel (12) and the pressure wheel (4), the extrusion wheel (12) and the pressure wheel (4) extrude the wire by friction with the wire, and the pressure wheel (4) can rotate under the drive of the friction between itself and the wire; And, a signal transmitting mechanism (15) and a speed detecting mechanism (31), wherein the signal transmitting mechanism (15) is fixedly matched with the pinch wheel (4) and rotates synchronously with the pinch wheel (4), the speed detecting mechanism (31) is fixedly matched with the fixing seat (5), the speed detecting mechanism (31) is used to monitor and obtain the speed V1 of the signal transmitting mechanism (15), the speed of the signal transmitting mechanism (15) is equal to the speed of the pinch wheel (4), and the wire extrusion structure satisfies: the theoretical extrusion speed of the wire V2 = 2ΠR1*V1, the speed of the extrusion wheel (12) = the speed of the motor (20) = V3 = V1*R1 / R2, R1 is the radius of the pinch wheel (4), and R2 is the radius of the extrusion wheel (12).

2. The remote extruder for a 3D printer according to claim 1, characterized in that: The axes of the pressing wheel (4) and the extrusion wheel (12) are arranged in parallel, and the circumferential side surface of at least one of the pressing wheel (4) and the extrusion wheel (12) is also provided with a continuous guide groove structure, and the guide groove structure between the pressing wheel (4) and the extrusion wheel (12) forms the wire channel.

3. The remote extruder for a 3D printer according to claim 2, characterized in that: The guide groove structure is an annular groove that continuously extends along the circumference of the pressing wheel (4) or the extrusion wheel (12).

4. The remote extruder for a 3D printer according to claim 1, 2 or 3, wherein: Also includes: A first assembly base (3), wherein the first assembly base (3) is arranged in the working chamber and is rotatably matched with the fixed base (5), the pressure wheel (4) and the signal transmitting mechanism (15) are fixedly arranged on the first assembly base (3), and the first assembly base (3), the pressure wheel (4) and the signal transmitting mechanism (15) rotate synchronously, wherein the pressure wheel (4) has no direct contact with the fixed base (5).

5. The remote extruder for a 3D printer according to claim 4, characterized in that: The pressure wheel (4) is fixedly sleeved on the first assembly base (3), the signal transmitting mechanism (15) is fixedly arranged at one end of the first assembly base (3), and the speed detection mechanism (31) is located in the working chamber and has no direct contact with the signal transmitting mechanism (15).

6. The remote extruder for a 3D printer according to claim 5, characterized in that: The pressing wheel (4) is coaxially arranged with the first assembly base (3).

7. The remote extruder for a 3D printer according to claim 4, characterized in that: One end of the first assembly base (3) is provided with a receiving groove, and the signal transmitting mechanism (15) is fixedly arranged in the receiving groove and faces the rotation speed detection mechanism (31).

8. The remote extruder for a 3D printer according to claim 5, 6 or 7, characterized in that: The rotation speed detection mechanism (31) is fixedly arranged on the fixing seat (5); alternatively, the wire extrusion structure further includes a second assembly base (9), the second assembly base (9) is fixedly connected to the fixing seat (5), and the rotation speed detection mechanism (31) is fixedly mounted on the second assembly base (9).

9. The remote extruder for a 3D printer according to claim 8, characterized in that: A buffer pad (13) is also provided between the fixing seat (5) and the second assembly base (9).

10. The remote extruder for a 3D printer according to claim 1, characterized in that: The signal transmitting mechanism (15) includes a magnet, and the rotation speed detecting mechanism (31) includes a magnetic encoder.

11. The remote extruder for a 3D printer according to claim 4, characterized in that: Also includes: A pressure swing arm, a spring adjustment column (7), and a spring (17), wherein the pressure swing arm is arranged in the working chamber, the pressure swing arm is rotatably connected to the fixing seat (5) via a hinge pin (16), the first assembly base (3) is connected to the pressure swing arm via a bearing (14), the spring adjustment column (7) is threadedly connected to the fixing seat (5), at least part of the spring adjustment column (7) is exposed outside the working chamber, the spring (17) is confined between the pressure swing arm and the spring adjustment column (7), and the pressure swing arm can rotate around the hinge pin (16) under the combined force of an external force and the elastic force of the spring (17), thereby changing the gap width between the extrusion wheel (12) and the pressure wheel (4).

12. The remote extruder for a 3D printer according to claim 1, characterized in that: The wire input structure comprises a wire tube fixing column (10) and a wire passing column (11), wherein the wire passing column (11) is fixed on the fixing seat (5), a portion of the wire passing column (11) extends into the working chamber, the wire tube fixing column (10) is fixedly arranged on the wire passing column (11), and the wire tube fixing column (10) and the wire passing column (11) have wire passages that are interconnected and can allow wires to pass through.

13. The remote extruder for a 3D printer according to claim 12, characterized in that: The wire tube fixing column (10) and the wire passing column (11) are coaxially arranged.

14. The remote extruder for a 3D printer according to claim 12, characterized in that: A wire pipe fixing seat (6) is also fixedly provided on the outside of the fixing seat (5).

15. The remote extruder for a 3D printer according to claim 12, characterized in that: The wire output structure comprises a quick-insert connector (19), and the quick-insert connector (19) is fixed on the fixing seat (5).

16. The remote extruder for a 3D printer according to claim 1, characterized in that: Also includes: A mounting seat (8), the motor (20) and the fixing seat (5) are fixedly mounted on the mounting seat (8).

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