Extrusion device and 3D printer

Abstract

The utility model provides an extrusion device and a 3D printer, and relates to the technical field of printing equipment. The extrusion device comprises a feeding assembly, the feeding assembly comprises at least two conveying belts, the at least two conveying belts are arranged at intervals, consumable conveying channels are formed between the adjacent conveying belts, and the at least two conveying belts drive consumables to be extruded out along the conveying channels. By increasing the contact area of the feeding assembly and the consumables, the friction force between the feeding assembly and the consumables is increased, and the situation that the feeding assembly and the consumables slip due to large extrusion force can be avoided to a great extent; and meanwhile, within the same time, larger driving force can be transmitted to the consumables, and the conveying efficiency of the consumables during printing is further improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to an extrusion device and a 3D printer. BACKGROUND

[0002] Generally, the feeding assembly of the 3D printer for conveying the consumables is mostly to extrude and convey the consumables by using the wire feeding wheel. When the printing speed of the 3D printer is improved, the wire feeding wheel needs to act on the consumables with greater driving force. However, when the driving force of the wire feeding wheel acting on the consumables is too large, the wire feeding wheel and the consumables are prone to slip, which affects the conveying efficiency of the consumables. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application aims to overcome the deficiencies in the prior art, and provides an extrusion device and a 3D printer, which adopt a conveying belt to contact the consumables, increase the contact area with the consumables, can alleviate the slipping between the extrusion device and the consumables, and can transmit greater driving force to the consumables, meet the requirement of feeding the wire with greater driving force, and help to improve the conveying efficiency of the consumables.

[0004] The present application provides the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides an extrusion device, which comprises:

[0006] A feeding assembly, which comprises at least two conveying belts, the at least two conveying belts are arranged at intervals, so that a consumable conveying channel is formed between adjacent conveying belts, and the at least two conveying belts drive the consumables to extrude along the conveying channel.

[0007] In some embodiments of the first aspect, the feeding assembly further comprises a driving transmission wheel and a driven transmission wheel, the driving transmission wheel and the driven transmission wheel are arranged at intervals, one end of the conveying belt is sleeved on the driving transmission wheel, and the other end of the conveying belt is sleeved on the driven transmission wheel.

[0008] In some embodiments of the first aspect, the conveying belt is two, the conveying belt is provided with a wire feeding groove, the consumables are located in the wire feeding groove, and the groove wall of the wire feeding groove abuts against the consumables.

[0009] In some embodiments of the first aspect, the extrusion device comprises a driving gear and a driven gear, the driving gear and the driven gear are engaged, the driving gear is in driving connection with the driving transmission wheel of one of the conveying belts, and the driven gear is in driving connection with the driving transmission wheel of the other of the conveying belts.

[0010] In some embodiments of the first aspect, the extrusion device further comprises:

[0011] a driving member connected with the driving gear, the driving member being capable of driving the driving gear to rotate.

[0012] In some embodiments of the first aspect, the extrusion device further comprises a tensioning member, the tensioning member being located away from the conveying passage and abutting against the conveying belt, for adjusting the tension of the conveying belt.

[0013] In some embodiments of the first aspect, the extrusion device further comprises a pinch roller, the pinch roller being located between the driving pulley and the driven pulley and close to one side of the conveying passage, and abutting against the conveying belt.

[0014] In some embodiments of the first aspect, the extrusion device further comprises an adjusting member, the conveying belt and the adjusting member being connected, and a pair of the conveying belts being oppositely arranged, the adjusting member being capable of adjusting the distance between the pair of the conveying belts.

[0015] In some embodiments of the first aspect, the adjusting member comprises:

[0016] a frame, one of the conveying belts being arranged on the frame;

[0017] a mounting seat, the other of the conveying belts being arranged on the mounting seat, and the mounting seat and the frame being slidingly connected, so that the mounting seat is capable of moving along the opposite direction of the pair of the conveying belts;

[0018] a pinch portion, one end of the pinch portion being connected with the frame, the axial direction of the pinch portion being parallel to the conveying belt, and the other end of the pinch portion abutting against one end of the mounting seat away from the corresponding conveying belt.

[0019] In a second aspect, the present application further provides a 3D printer, the 3D printer comprising the extrusion device according to any one of the above embodiments.

[0020] The embodiments of the present application have the following advantages:

[0021] The present application provides an extrusion device, which uses a conveying belt to replace a conventional wire feeding wheel to convey a consumable. At least two conveying belts are arranged at intervals, so that a conveying passage is formed between the adjacent conveying belts. In operation, the conveying belt can directly extrude the consumable arranged in the conveying passage, and the portions of all the conveying belts in contact with the consumable maintain the same linear speed, so that the consumable is conveyed at a set speed.

[0022] Obviously, by adopting the way of increasing the contact area, the driving force can be more evenly distributed to the consumables; increasing the contact area between the conveying belt and the consumables, making the friction between them larger. Furthermore, it should be noted that, since the conveying belt can be elastically deformed, it can increase the extrusion force of the conveying belt acting on the consumables without damaging the consumables. Therefore, the application can alleviate or avoid the phenomenon of slipping caused by pressure concentration, and can transmit greater driving force to the consumables.

[0023] The application also relates to a 3D printer, since the above-mentioned extrusion device has the above-mentioned technical effects, the 3D printer comprising the extrusion device should have the same technical effects, which will not be described here.

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the application, therefore should not be regarded as a limitation to the scope, for those skilled in the art, without paying creative labor, other related drawings can also be obtained according to these drawings.

[0026] Figure 1 A perspective view of the structure of the extrusion device provided by the embodiment one of the application is shown;

[0027] Figure 2 Another perspective view of the structure of the extrusion device provided by the embodiment one of the application is shown;

[0028] Figure 3 Still another perspective view of the structure of the extrusion device provided by the embodiment one of the application is shown;

[0029] Figure 4 An exploded structural schematic view of the extrusion device provided by the embodiment one of the application is shown;

[0030] Figure 5 A perspective view of the structure of the extrusion device provided by the embodiment two of the application is shown.

[0031] Main element symbol explanation:

[0032] 10-extrusion device;

[0033] 100-feeding assembly; 110-conveying belt; 111-sending groove; 120-driven transmission wheel; 130-driven transmission wheel;

[0034] 200 - driving member; 300 - tensioning member; 310 - tensioning wheel; 320 - slide; 330 - spring;

[0035] 400 - consumable;

[0036] 500 - adjusting member; 510 - frame; 520 - guide rail; 530 - mounting seat; 540 - tightening portion;

[0037] 600 - driven gear;

[0038] 700 - driving gear. DETAILED DESCRIPTION

[0039] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which like or similar elements are denoted by the same or similar reference symbols throughout the drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application.

[0040] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. Like numbers refer to like elements throughout the description of the figures.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking", "fixing" and the like should be interpreted in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0044] In the related art, the feeding assembly of the 3D printer for conveying the consumable is mostly to extrude and convey the consumable by using the wire feeding wheel. When the printing speed of the 3D printer is improved, the wire feeding wheel needs to act on the consumable with greater driving force. However, when the driving force of the wire feeding wheel acting on the consumable is too large, the wire feeding wheel and the consumable are prone to slip, which affects the conveying efficiency of the consumable.

[0045] As shown in Figure 1 and Figure 2 To solve the above technical problems, the embodiments of the present application provide an extrusion device 10, which comprises a feeding assembly 100, and the feeding assembly 100 comprises at least two conveying belts 110, the at least two conveying belts 110 are arranged at intervals to form a conveying passage for the consumable 400 between adjacent conveying belts 110, and the at least two conveying belts 110 drive the consumable 400 to extrude along the conveying passage.

[0046] In these embodiments, an improved feeding assembly 100 design is provided to solve the problem of reduced conveying efficiency of the conventional 3D printer due to the slip between the wire feeding wheel and the consumable 400 at high printing speed.

[0047] Among them, the conveying belt 110 has a conveying direction, and the conveying directions of the at least two conveying belts 110 are the same. Since all the conveying belts 110 abut against the consumable 400 arranged in the conveying passage, the consumable 400 can be conveyed at a set speed.

[0048] For example, the surface of the conveying belt 110 is provided with a textured structure to further increase the friction between the conveying belt 110 and the consumable 400. For example, the textured structure is a protrusion on the surface of the conveying belt 110, a coating, etc.

[0049] Of course, the conveying belt 110 directly extrudes and transports the consumable 400. The material of the conveying belt 110 can be rubber, polyurethane, PVC, metal mesh or fabric, etc., which is not specifically limited here.

[0050] For example, conveyor belts 110 are used instead of feed rollers to transport the consumable 400. These conveyor belts 110 are spaced apart, forming a transport channel between adjacent conveyor belts 110. This allows each conveyor belt 110 to directly extrude into contact with the consumable 400 passing through the transport channel. Optionally, the portions of all conveyor belts 110 in contact with the consumable 400 maintain the same linear speed, that is, the consumable 400 can be transported at a set speed, improving the extrusion effect of the consumable 400.

[0051] Clearly, by increasing the contact area, the driving force can be distributed more evenly to the consumable 400. The increased contact area through the conveyor belt 110 increases the friction between the conveyor belt 110 and the consumable 400. Furthermore, because the conveyor belt 110 is elastically deformable, it can increase the compressive force exerted by the conveyor belt 110 on the consumable 400 and the contact area between them without compressing the consumable 400. Therefore, this application can reduce slippage caused by pressure concentration and transmit greater driving force to the consumable 400.

[0052] In other words, even when higher driving force is required, this structure can better maintain the stable delivery of consumable 400. This design has better compatibility with consumable 400 of different diameters or types because the position of the conveyor belt 110 can be adjusted to accommodate different materials.

[0053] like Figure 2 and Figure 3 As shown, in some embodiments, the feeding assembly 100 further includes a drive wheel 130 and a driven wheel 120, with the drive wheel 130 and the driven wheel 120 spaced apart. One end of the conveyor belt 110 is fitted onto the drive wheel 130, and the other end of the conveyor belt 110 is fitted onto the driven wheel 120.

[0054] In these embodiments, the drive wheel 130 and the driven wheel 120 are connected by a conveyor belt 110, thereby causing the drive wheel 130 to drive the conveyor belt 110 to rotate, so as to move the consumable 400 along the consumable 400 conveying channel.

[0055] For example, in these embodiments, the number of driving pulleys 130 and driven pulleys 120 is not limited to one. These driving pulleys 130 and driven pulleys 120 are arranged at intervals and kept parallel to the conveying direction, so that the conveyor belt 110 can pass around the driving pulleys 130 and driven pulleys 120.

[0056] Multiple drive pulleys 130 and driven pulleys 120 are evenly spaced in the conveying direction to ensure the smooth operation of the conveyor belt 110. The number, position, and spacing of the drive pulleys 130 and driven pulleys 120 need to be determined according to specific design requirements. The conveyor belt 110 forms a closed loop through these drive pulleys, thereby ensuring that the consumables 400 can be conveyed stably and continuously. Furthermore, the tension of the conveyor belt 110 can be controlled by adjusting the position of the drive pulleys or by using a tensioning device.

[0057] It should be noted that these drive wheels are arranged parallel to the conveying direction, which ensures that the filament 400 maintains a straight line throughout the conveying process. This parallel relationship helps reduce bending or twisting of the filament 400 and improves printing accuracy.

[0058] For example, in this embodiment, there is one driving drive wheel 130 and one driven drive wheel 120. Of course, in other embodiments, there is one driving drive wheel 130 and two driven drive wheels. Or, there are two driving drive wheels 130 and one driven drive wheel, etc., and no specific limitation is made here.

[0059] Clearly, with the support of multiple drive pulleys, the conveyor belt 110 can maintain a consistent tension over a longer distance, reducing the risk of slack or breakage and increasing the lateral pressure exerted on the consumable 400 by the middle section of the conveyor belt 110. Each drive pulley can act as a control point, with its speed synchronously controlled by a precision drive system (such as a stepper motor or servo motor), ensuring that all sections of the conveyor belt 110 operate at the same linear speed. This multi-point control mechanism facilitates finer speed regulation and better synchronization.

[0060] For example, both the driving drive wheel 130 and the driven drive wheel 120 should be connected to a reliable drive source to ensure that all drive wheels can rotate synchronously. Of course, in other embodiments, the driving drive wheel 130 and the driven drive wheel 120 may share a single drive source. Alternatively, only the driving drive wheel 130 may have a drive source.

[0061] like Figure 1 As shown, in some embodiments, there are two conveyor belts 110, each conveyor belt 110 is provided with a wire feeding groove 111, the consumable 400 is located in the wire feeding groove 111, and the groove wall of the wire feeding groove 111 abuts against the consumable 400.

[0062] In these embodiments, the number of conveyor belts 110 is set to two, and the two conveyor belts 110 are arranged in opposition. This means that the two conveyor belts 110 are arranged face-to-face, forming a space for clamping the consumable 400, i.e. a consumable 400 conveying channel. In addition, each conveyor belt 110 is provided with a wire feed groove 111 on the outer circumferential surface thereof, and the wire feed grooves 111 extend along the extension direction of the conveyor belt 110 and are connected end-to-end so as to be able to accommodate part of the consumable 400.

[0063] Obviously, the wire feed groove 111 is designed such that at least part of the consumable 400 is embedded in the wire feed groove 111, increasing the contact area and friction, thereby reducing the possibility of slippage. Moreover, the close contact between the groove wall of the wire feed groove 111 and the consumable 400 ensures that the consumable 400 can be stably conveyed even in the case of high driving force.

[0064] At the same time, since the consumable 400 is confined within the wire feed groove 111, this helps to maintain its straightness, reducing deviation or bending, and is conducive to ensuring that the consumable 400 can be stably conveyed. Such a design is particularly important for applications that require precise control of the amount of consumable 400.

[0065] Exemplarily, a plurality of conveyor belts 110 are provided, and the plurality of conveyor belts 110 respectively have wire feed grooves 111 of different specifications, so that the conveyor belt 110 can be adjusted and replaced according to consumables 400 of different diameters, so that the same set of feeding assembly 100 can support consumables 400 of multiple specifications. This can improve efficiency for users who need to frequently change the type of consumable 400.

[0066] Of course, in the case of wear or damage of the wire feed groove 111, the system can be quickly repaired by replacing the conveyor belt 110 with a new wire feed groove 111, so that maintenance is also relatively simple.

[0067] Furthermore, the use of two opposed conveyor belts 110 is more compact in mechanical structure than the use of multiple dispersed conveyor belts 110, meaning lower cost, less maintenance requirement and higher reliability.

[0068] It should be noted that the shape and size of the wire feed groove 111 should be optimized according to the most commonly used consumable 400 diameter to ensure optimal contact and minimal gap.

[0069] Exemplarily, the wire feed groove 111 is provided as a V-shaped groove. Of course, in other embodiments, the wire feed groove 111 can also be an arc-shaped groove, a rectangular groove, a U-shaped groove, etc.

[0070] It is important to note that the drive of both belts 110 must be fully synchronized, otherwise it can cause the consumable 400 to twist or break. The material of the belts 110 and the spooling slot 111 should be both wear-resistant and have sufficient flexibility to facilitate installation and disassembly.

[0071] As shown in FIGS. 1 1 and 12, in some embodiments, the extrusion device 10 includes a driving gear 700 and a driven gear 600, the driving gear 700 meshes with the driven gear 600, the driving gear 700 is drivingly connected with the driving pulley 130 of one of the belts 110, and the driven gear 600 is drivingly connected with the driving pulley 130 of the other belt 110. Figure 2 Figure 4 In these embodiments, the synchronous operation of the two belts 110 is achieved through a gear transmission system. Specifically, the driving gear 700 meshes with the driven gear 600. That is, the rotation of the driving gear 700 can drive the rotation of the driven gear 600, thereby achieving the rotation of the two belts 110.

[0072] It should be noted that the driving gear 700 and the driven gear 600 mesh with each other to form a gear transmission system. When the driving member 200 drives the driving gear 700 to rotate below, the driving gear 700 will drive the driven gear 600 meshing therewith to rotate together. Due to the mechanical connection between the driving gear 700 and the driven gear 600, the two belts 110 can maintain strict synchronous operation. This mechanical connection ensures that the two belts 110 can maintain consistent speed and position even under high load or high speed.

[0073] Obviously, the gear transmission system provides very high synchronization accuracy because the meshing between the gears is rigid and there is no elastic sliding in the transmission of the belts 110. This synchronization is particularly important for applications that require high-precision printing. The structure of the gear transmission system is relatively simple and reliable, reducing the failure rate caused by complex transmission mechanisms. The mechanical connection is more stable than other forms of transmission, especially under long-term operation and high load.

[0074] Of course, in other embodiments, the driving gear 700 is drivingly connected with the driven pulley 120 of one of the belts 110, and the driven gear 600 is drivingly connected with the driven pulley 120 of the other belt 110. Alternatively, the driving gear 700 is drivingly connected with the driving pulley 130 of one of the belts 110, and the driven gear 600 is drivingly connected with the driven pulley 120 of the other belt 110, and so on.

[0075] As shown in FIGS. 1 1 and 12, in some embodiments, the extrusion device 10 includes a driving gear 700 and a driven gear 600, the driving gear 700 meshes with the driven gear 600, the driving gear 700 is drivingly connected with the driving pulley 130 of one of the belts 110, and the driven gear 600 is drivingly connected with the driving pulley 130 of the other belt 110.

[0076] As shown in FIGS. 1 1 and 12, in some embodiments, the extrusion device 10 includes a driving gear 700 and a driven gear 600, the driving gear 700 meshes with the driven gear 600, the driving gear 700 is drivingly connected with the driving pulley 130 of one of the belts 110, and the driven gear 600 is drivingly connected with the driving pulley 130 of the other belt 110. Figure 4 ​As shown, in some embodiments, the extrusion device 10 further includes a drive member 200, which is connected to the drive gear 700, and the drive member 200 is capable of driving the drive gear 700 to rotate.

[0077] In these embodiments, the drive element 200 may be a motor, such as a stepper motor, a servo motor, or other type of drive device. Clearly, the drive element 200 is connected to the drive gear 700 and provides driving force to rotate it.

[0078] To ensure synchronized operation of the two conveyor belts 110, the drive unit 200 must be able to precisely control the speed and position of each conveyor belt 110. A closed-loop control system (e.g., a servo system with feedback sensors) can be used to monitor and adjust the speed of the conveyor belts 110 to ensure that they remain consistent at all times.

[0079] For example, the drive gear 700, the drive wheel 130 and the drive shaft are coaxially connected, and the drive member 200 is connected to the drive shaft, so that the drive member 200 is used to drive the drive shaft to rotate.

[0080] like Figure 4 As shown, in some embodiments, the extrusion device 10 includes a tensioner 300, which is located away from the conveying channel and abuts against the conveyor belt 110 for adjusting the tension of the conveyor belt 110.

[0081] In these embodiments, this design ensures that the conveyor belt 110 maintains appropriate tension during operation, thereby improving conveying efficiency and system stability.

[0082] For example, tensioner 300 is a tensioner, which can be a manual or automatic adjustment device. The tensioner 300 is mechanically connected to the conveyor belt 110. For instance, the tensioner 300 includes a tensioning wheel 310, a slide block 320, a slide rail, and a spring 330. The outer circumferential surface of the tensioning wheel 310 abuts against the conveyor belt 110. The tensioning wheel 310 is slidably connected to the slide rail via the slide block 320, and one end of the spring 330 is connected to the slide block 320, while the other end is connected to the slide rail. It automatically fine-tunes according to the actual tension of the conveyor belt 110 to maintain a constant tension.

[0083] Clearly, proper tension can prevent the conveyor belt 110 from slackening or jumping, ensuring stable delivery of the consumable 400. It also reduces slippage caused by a loose conveyor belt 110, improving printing accuracy and quality.

[0084] like Figure 5 In some embodiments, the extrusion device 10 includes a clamping wheel located between the drive wheel 130 and the driven wheel 120 and close to the side of the conveying channel, and abutting against the conveyor belt 110.

[0085] In these embodiments, the pinch rollers are arranged between the driving wheel 130 and the driven wheel 120, and abut the inner side of a portion of the conveying channel, supporting the conveying belt 110 and effectively limiting the oscillation of the conveying belt 110 on the side that contacts the consumable 400, thereby increasing the squeezing friction.

[0086] Of course, in other embodiments, pinch plates can be provided instead of pinch rollers, both of which serve the same purpose. This is an alternative operation for those skilled in the art.

[0087] For example, in the present embodiment, the number of pinch rollers is two. Of course, in other embodiments, the number of pinch rollers is one, three, four, five, six, etc.

[0088] As Figure 4 shown, some embodiments of the extrusion device 10 further include an adjusting member 500, and a pair of conveying belts 110 are connected to the adjusting member 500. The pair of conveying belts 110 are arranged opposite to each other, and the adjusting member 500 is capable of adjusting the distance between the pair of conveying belts 110.

[0089] In these embodiments, the adjusting member 500 is introduced to adjust the distance between the two conveying belts 110. This design allows users to flexibly adjust the position of the conveying belts 110 according to the diameter of the consumable 400 or the printing requirements, thereby optimizing the clamping effect of the consumable 400.

[0090] For example, one of the pair of conveying belts 110 is a fixed conveying belt 110, and the other is a movable conveying belt 110. The position of the fixed conveying belt 110 is fixed and does not move with the adjusting member 500. A stable reference point is provided to facilitate the consumable 400 to enter the heating channel of the subsequent heating assembly for melting.

[0091] The movable conveying belt 110 is connected to the adjusting member 500 and can move in the opposite direction as needed. By adjusting the position of the movable conveying belt 110 relative to the fixed conveying belt 110 through the adjusting member 500, it can adapt to consumables 400 of different diameters.

[0092] In short, the adjusting member 500 is used to adjust the distance between the movable conveying belt 110 and the fixed conveying belt 110. Furthermore, by adjusting the appropriate distance, the friction and lateral squeezing force between the conveying belt 110 and the consumable 400 can be changed, which can reduce the slippage of the consumable 400 and improve the conveying efficiency. It ensures that the consumable 400 is stably and uniformly conveyed throughout the printing process, thereby improving the printing quality.

[0093] Exemplarily, the adjusting member 500 is a manual adjusting member 500, such as a screw rod, a hand wheel or a knob, which is rotated or pushed to adjust the interval. Of course, in other embodiments, the adjusting member 500 can also be an electric adjusting member 500, such as a linear actuator driven by a servo motor or a stepping motor, which automatically adjusts the interval through a control system. Alternatively, the adjusting member 500 can also be a pneumatic adjusting member 500, which uses a pneumatic cylinder or other pneumatic elements to achieve precise interval adjustment.

[0094] Of course, in other embodiments, the adjusting member 500 can simultaneously drive a pair of conveying belts 110 to move closer to or further away from each other.

[0095] As shown in FIG. 1, in some embodiments, the adjusting member 500 includes a frame 510, a mounting seat 530 and a tightening portion 540, wherein one conveying belt 110 is arranged on the frame 510; the other conveying belt 110 is arranged on the mounting seat 530, and the mounting seat 530 and the frame 510 are slidingly connected so that the mounting seat 530 can move in the opposite direction of the pair of conveying belts 110; one end of the tightening portion 540 is connected with the frame 510, the axial direction of the tightening portion 540 is parallel to the opposite direction, and the other end of the tightening portion 540 abuts against one end of the mounting seat 530 away from the corresponding conveying belt 110. Figure 4

[0096] In these embodiments, taking the adjusting member 500 for adjusting the position of the movable conveying belt 110 as an example, of course, in other embodiments, the adjusting member 500 can also be used to simultaneously adjust the positions of a pair of conveying belts 110. This design allows the position of the movable conveying belt 110 to be adjusted manually or by a simple mechanical means, thereby changing the interval between the two conveying belts 110. The frame 510 serves as the basic structure of the entire adjusting member 500, providing support and guiding functions. It is usually made of a strong material, such as metal or high-strength plastic.

[0097] The mounting seat 530 is connected with the driving transmission wheel 130 and the driven transmission wheel 120 corresponding to the movable conveying belt 110, and the mounting seat 530 is used to carry the movable conveying belt 110 and its related components. The mounting seat 530 is slidingly connected with the frame 510 and can move in the opposite direction.

[0098] Exemplarily, the frame 510 is provided with a guide rail 520, which extends in the opposite direction, and the mounting seat 530 and the guide rail 520 are slidingly connected. That is, the guide rail 520 is used to limit the movable direction of the mounting seat 530.

[0099] ​The top tight part 540 is connected with the rack 510, and the axial direction of the top tight part 540 is parallel to the conveying belt direction. One end of the top tight part 540 abuts against the end of the mounting seat 530 away from the fixed conveying belt 110, so as to limit the position of the conveying belt in the opposite direction.

[0100] Exemplarily, the top tight part 540 is threadedly connected with the rack 510. By rotating the top tight part 540, the mounting seat 530 can be pushed to move towards the fixed conveying belt 110, so as to adjust the position of the movable conveying belt 110.

[0101] The mounting seat 530 is connected with the rack 510 through the guide rail 520 or other sliding mechanisms, so as to ensure that the mounting seat 530 can move smoothly in the opposite direction. The top tight part 540 is threadedly connected with the rack 510. When the top tight part 540 is rotated, the top tight part 540 will move along the axial direction, push the mounting seat 530, and thus change the distance between the movable conveying belt 110 and the fixed conveying belt 110. Obviously, the user can accurately adjust the position of the movable conveying belt 110 by rotating the top tight part 540, so as to adapt to different diameters of the consumables 400 or different printing requirements.

[0102] It should be noted that the threaded connection provides fine adjustment capability, and can realize millimeter-level or even smaller distance adjustment. Through scale marks or other indication devices, the user can accurately know the current distance setting. The user only needs to rotate the top tight part 540 to complete the adjustment, without the need of complex tools or professional knowledge. Different consumable 400 specifications can be quickly switched, and the work efficiency is improved.

[0103] Exemplarily, the transmission wheel of the fixed conveying belt 110 is rotatably installed on the bracket, and the driving member 200 is installed on the bracket.

[0104] Exemplarily, in the present application, the top tight part 540 is a top tight bolt. Of course, in other embodiments, the top tight part 540 is a top tight screw, a stud, or the like.

[0105] In some embodiments, the present application also provides a 3D printer, which comprises the extrusion device 10 according to any one of the above embodiments.

[0106] Since the above-mentioned feeding assembly 100 has the above-mentioned technical effects, the 3D printer comprising the feeding assembly 100 should also have the same technical effects, which will not be described here again.

[0107] Exemplarily, in the present embodiment, the 3D printer is an FDM (Fused Deposition Modeling) type 3D printer. Of course, in other embodiments, the 3D printer can also be an SLA (Stereolithography) type 3D printer, or the like.

[0108] In all of the examples shown and described herein, any specific values should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments can have different values.

[0109] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it is not necessary to further define and explain it in the subsequent views.

[0110] The above-described embodiments are merely illustrative for the present application and do not restrict the scope of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these should be within the scope of the present application.

Claims

1. An extrusion device, characterized in that, The extrusion device comprises: a feeding assembly comprising at least two conveying belts, the at least two conveying belts being arranged in a spaced manner to form a material conveying channel between adjacent conveying belts, and the at least two conveying belts driving the material to be extruded along the conveying channel.

2. The extrusion device of claim 1, wherein, The feeding assembly further comprises a driving gear and a driven gear, the driving gear and the driven gear being arranged in a spaced manner, one end of the conveying belt being sleeved on the driving gear, and the other end of the conveying belt being sleeved on the driven gear.

3. The extrusion device of claim 2, wherein, The conveying belt is provided with a wire feeding groove, the material to be extruded is located in the wire feeding groove, and the groove wall of the wire feeding groove abuts against the material to be extruded.

4. The extrusion device of claim 3, wherein, The extrusion device comprises a driving gear and a driven gear, the driving gear and the driven gear being arranged in a spaced manner, one end of the conveying belt being sleeved on the driving gear, and the other end of the conveying belt being sleeved on the driven gear.

5. The extrusion device of claim 4, wherein, The extrusion device further comprises: a driving member connected with the driving gear, the driving member being capable of driving the driving gear to rotate.

6. The extrusion device of claim 1, wherein, The extrusion device comprises a tensioning member, the tensioning member being away from the conveying channel and abutting against the conveying belt, and being used for adjusting the tension of the conveying belt.

7. The extrusion device of claim 2, wherein, The extrusion device comprises a pressing wheel, the pressing wheel being located between the driving gear and the driven gear and being close to one side of the conveying channel, and abutting against the conveying belt.

8. The extrusion device of claim 3, wherein, The extrusion device further comprises an adjusting member, the conveying belt and the adjusting member being connected, and a pair of conveying belts being arranged in a spaced manner, the adjusting member being capable of adjusting the distance between the pair of conveying belts.

9. The extrusion device of claim 8, wherein, The adjusting member comprises: a rack, one of the conveying belts being arranged on the rack; a mounting seat, the other conveying belt being arranged on the mounting seat, and the mounting seat and the rack being connected in a sliding manner, so that the mounting seat is capable of moving along the opposite direction of the pair of conveying belts; a pressing portion, one end of the pressing portion being connected with the rack, the axial direction of the pressing portion being parallel to the conveying belt, and the other end of the pressing portion abutting against the end of the mounting seat away from the corresponding conveying belt.

10. A 3D printer characterized by, The 3D printer comprises the extrusion device according to any one of claims 1 to 9.

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