Feed line delivery device for a 3D printing apparatus and 3D printing apparatus

Abstract

The utility model discloses a kind of material line conveying devices and 3D printing equipment for 3D printing equipment, and the material line conveying device for 3D printing equipment includes: material line shell;Fixed pipeline and sliding block, one end of fixed pipeline is connected to one end of feed pipe, another end of feed pipe is connected to feeding assembly, buffer cavity is formed in sliding block, one end of discharge pipe, which is communicated with buffer cavity, is also connected to one end of sliding block away from feed pipe, another end of discharge pipe is coupled extrusion assembly;First elastic member and second elastic member.According to the material line conveying device for 3D printing equipment of the utility model, the movement of material line can be buffered, to change the length of the movement path of material line, reduce the movement resistance of material line, improve production efficiency and product quality, overall structure is relatively simple, easy to operate and realize.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202311086928.1, filed on August 25, 2023, entitled "A Material Line Resistance Detection Device, a 3D Printer Printhead and a 3D Printer", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This utility model relates to the field of printer technology, and in particular to a filament conveying device for 3D printing equipment and a 3D printing equipment having the filament conveying device for 3D printing equipment. Background Technology

[0004] For 3D printers equipped with filament boxes, the filament travels a relatively long path from the filament box to the print head, resulting in significant resistance. During the operation of the 3D printer, various factors, such as filament box jamming and filament tangling, can increase the filament's resistance. When the filament's resistance increases to a certain extent, it can lead to insufficient filament extrusion and slippage of the extrusion wheel, affecting the final print result or causing print failure. There is room for improvement in this regard. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this invention is to provide a filament conveying device for 3D printing equipment. This device can buffer the movement of the filament during normal filament conveying, thereby changing the length of the filament's movement path. It can buffer the force on the filament caused by the asynchrony between the extruders at both ends of the filament, improving production efficiency and product quality. It can also buffer the movement of the sliding block, ensuring the smoothness of the sliding block's movement. The overall structure is relatively simple and easy to operate and implement. Furthermore, the filament output device proposed in this invention also has a material entanglement buffering function; that is, when the resistance of the filament is too high, the length of the filament's movement path can be changed to prevent the filament from being torn apart due to excessive resistance. This invention uses two elastic elements with different elastic coefficients, which allows the buffering of normal filament conveying and the buffering of material entanglement to be independent of each other.

[0006] A filament conveying device for a 3D printing equipment according to an embodiment of the present invention includes: a filament housing; a fixed pipe and a sliding block, wherein the fixed pipe is installed in the filament housing, one end of the fixed pipe is connected to one end of a feed pipe, the other end of the feed pipe is used to connect to a feeding assembly, the sliding block is slidably installed in the filament housing, a buffer cavity communicating with the fixed pipe is formed in the sliding block, and one end of the sliding block away from the feed pipe is also connected to one end of an outlet pipe communicating with the buffer cavity, the other end of the outlet pipe is used to couple an extrusion assembly; a first elastic member and a second elastic member, wherein the elastic coefficient of the first elastic member is greater than the elastic coefficient of the second elastic member; wherein the first elastic member abuts between the fixed pipe and the side of the sliding block facing the feed pipe, and the second elastic member abuts between the filament housing and the side of the sliding block facing the outlet pipe, or, both the first elastic member and the second elastic member are disposed between the fixed pipe and the sliding block, and the second elastic member is sleeved outside the first elastic member.

[0007] According to the filament feeding device for 3D printing equipment of this utility model embodiment, a second elastic element can buffer the movement of the filament during normal filament feeding. The deformation of the second elastic element can change the length of the filament's movement path. Because the filament's movement path is relatively long, multiple extrusion components are generally required along the filament's movement path. Since the extrusion components are driven by motors, if the synchronization control between the two motors is not well done, the forces between the feeding component and the extrusion component will be asynchronous, leading to filament pulling. In this utility model, the second elastic element can buffer the force on the filament, reduce control difficulty, and improve production efficiency and product quality. In addition, the filament output device proposed in this utility model also has a filament entanglement buffer function. The filament entanglement buffer is different from the buffer during normal feeding. It is used when the filament resistance is too high due to reasons other than the asynchronous relationship between motors, such as filament box jamming or filament entanglement. At this time, the deformation of the first elastic element can change the length of the filament's movement path, preventing the filament from being torn apart when it is subjected to excessive resistance. By setting a first elastic element and a second elastic element, the movement of the sliding block can be buffered. Regardless of the positions of the first and second elastic elements in the filament conveying device of the 3D printing equipment, the smoothness of the sliding block's movement can be ensured. The overall structure is relatively simple and easy to operate and implement. In other words, the filament conveying device of this invention integrates filament conveying buffering and filament entanglement buffering into one unit, resulting in a simple and compact structure.

[0008] According to some embodiments of the present invention, a filament feeding device for a 3D printing equipment further includes: a first detection element and a first trigger element. The first detection element is disposed in one of the filament housing and the sliding block, and the first trigger element is disposed in the other of the sliding block and the filament housing. The first detection element is used to detect the relative distance or change in relative distance with the first trigger element, thereby detecting the relative distance or change in relative distance between the extrusion assembly and the feeding assembly. The present invention can detect changes in the relative distance between the extrusion assembly and the feeding assembly, thereby determining whether the filament resistance has increased. Furthermore, due to the presence of the first elastic element, a greater change in relative distance indicates greater resistance, thus allowing the determination of the resistance magnitude and preventing printing defects or failures. Moreover, the reduction in the relative distance between the extrusion assembly and the feeding assembly caused by excessive resistance can buffer the impact of excessive resistance, providing time for timely response during high-speed printing.

[0009] According to some embodiments of the present invention, in a filament conveying device for a 3D printing equipment, the first elastic member is in a compressed state, and / or the second elastic member is in a compressed state. Implementing the present invention, when the filament conveying device is not in operation, the two elastic members can define the initial position of the sliding block. The filament conveying device not being in operation can be understood as the feeding assembly not conveying filament, and the extrusion assembly not extruding filament.

[0010] According to some embodiments of the present invention, in a filament conveying device for 3D printing equipment, when the second elastic member is sleeved outside the first elastic member, there is a sliding distance between the sliding block and the filament housing. In this case, during normal filament conveying, if the extrusion speed of the extrusion assembly is less than the speed of the feeding assembly, and the filament's movement path needs to be longer, the second elastic member can be in a stretched state.

[0011] According to some embodiments of the present invention, a material conveying device for a 3D printing equipment further includes a second detection element and a second trigger element; the second detection element is fixed relative to the fixed pipe, and the second trigger element is movably installed in the fixed pipe along an axial direction perpendicular to the fixed pipe and extends at least partially into the fixed pipe; wherein the material thread is conveyed in the fixed pipe along the axial direction of the fixed pipe.

[0012] According to some embodiments of the present invention, in a material feeding device for a 3D printing equipment, the second detection element is used to detect the relative distance or change in relative distance with the second trigger element to detect whether the material thread has entered the fixed pipe.

[0013] According to some embodiments of the present invention, the feed line device for 3D printing equipment further includes an elastic reset member, one end of which is fixedly disposed relative to the fixed pipe, and the other end of which is connected to the second trigger member.

[0014] According to some embodiments of the present invention, in a feed line device for a 3D printing equipment, the second trigger member has an inclined pushing part that extends into the fixed pipe. The inclined pushing part has an inclined pushing surface that is inclined along the feed direction of the feed line.

[0015] According to some embodiments of the present invention, a filament conveying device for a 3D printing equipment further includes a press-type connector for connecting the sliding block and the discharge pipe. The press-type connector includes a press-unlocking part. The filament housing has an exposed opening along the axial direction of the discharge pipe, and the diameter of the exposed opening is larger than the diameter of the press-unlocking part.

[0016] According to some embodiments of the present invention, in a material conveying device for a 3D printing equipment, the sliding block is further provided with a pushing protrusion, which extends out of the material line housing in an axial direction perpendicular to the discharge pipe.

[0017] According to some embodiments of the present invention, the material line conveying device for 3D printing equipment further includes a limiting flange formed in the material line housing. The limiting flange is divided into two sets and is spaced apart. The sliding block is limited and installed between the two sets of limiting flanges and can slide along the limiting flange.

[0018] According to some embodiments of the present invention, the feed line device for 3D printing equipment includes a first flange and a second flange in each set of limiting flanges. The first flange and the second flange are spaced apart along the sliding direction of the sliding block and form an intermediate gap. The sliding block is adapted to slide into the second flange from the end away from the first flange, and the sum of the extension length of the first flange and the length of the intermediate gap is less than the extension length of the sliding block.

[0019] According to some embodiments of the present invention, the filament conveying device for 3D printing equipment further includes a first limiting part, and the sliding block presses against the first limiting part when it moves to its limit position in a direction close to the feed pipe.

[0020] According to some embodiments of the present invention, in a material conveying device for a 3D printing equipment, the first limiting part is constructed as a triangular block and has a clearance slope, wherein the clearance slope is constructed to be inclined along the feeding direction of the fixed pipe.

[0021] According to some embodiments of the present invention, a material conveying device for a 3D printing equipment, the first trigger has a first sensing end and a second sensing end, the first sensing end and the second sensing end are spaced apart along the sliding direction of the sliding block, and the first detection element is located between the first sensing end and the second sensing end; wherein, when the sliding block moves to its limit position in the direction close to the feed pipe, the first detection element generates a first material entanglement signal, and when the sliding block moves to its limit position in the direction close to the discharge pipe, the first detection element generates a second material entanglement signal.

[0022] This utility model also proposes a 3D printing device.

[0023] The 3D printing equipment according to the present invention includes a feeding assembly, an extrusion assembly, and a material conveying device for the 3D printing equipment as described above, wherein the feeding assembly is connected to the feed pipe, and the extrusion assembly is connected to the discharge pipe.

[0024] The 3D printing equipment according to some embodiments of the present invention further includes a control module, wherein the feeding assembly is provided with a feeding drive and the extrusion assembly is provided with a discharging drive; wherein the control module is used to control the operation of the feeding drive and / or the discharging drive.

[0025] According to some embodiments of the present invention, in a 3D printing device, there are two material conveying devices for the 3D printing device, and the two material conveying devices for the 3D printing device are arranged side by side.

[0026] The 3D printing equipment according to some embodiments of the present invention further includes a chassis, wherein the filament conveying device for the 3D printing equipment is located inside the chassis. Optionally, the chassis provides a first limiting part corresponding to the second flange of the filament conveying device for the 3D printing equipment. The position of the first limiting part is closer to the second flange than the position where the sliding block slides in, so as to prevent the slider from moving towards the feed tube and sliding out of the filament housing when the material gets tangled.

[0027] According to some embodiments of the 3D printing equipment of the present invention, the chassis is provided with an openable door, and the sliding block is provided with a pushing protrusion, which protrudes toward the door.

[0028] The advantages of the 3D printing equipment and the aforementioned feed line device for 3D printing equipment compared to the prior art are the same, and will not be elaborated here.

[0029] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial cross-sectional view of a 3D printing device according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a partial cross-sectional view of a 3D printing device according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a partial cross-sectional view of a 3D printing device according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a partial cross-sectional view of a 3D printing device according to an embodiment of the present invention. Figure 4 ; Figure 5 This is a cross-sectional schematic diagram of two feed line input devices according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of two feed line input devices according to an embodiment of the present utility model; Figure 7 This is a partial cross-sectional view of a 3D printing device according to an embodiment of the present invention. Figure 5 ; Figure 8 This is a schematic diagram of the structure of a material line resistance detection device according to this utility model; Figure 9 This is a schematic diagram of the structure of a 3D printer printhead according to the present invention.

[0031] Figure label: Material conveyor 100 for 3D printing equipment, 3D printing equipment 200 The feed line housing 1 includes an exposed opening 101, a limiting flange 102, a first flange 1021, a second flange 1022, an intermediate gap 1023, a first limiting part 103, a clearance slope 1031, a fixed pipe 2, a sliding block 3, a buffer cavity 31, a pushing protrusion 32, a feed pipe 4, a first elastic element 6, a second elastic element 7, a first detection element 8, a first trigger element 9, a first sensing end 91, a second sensing end 92, a second detection element 10, a second trigger element 11, an inclined pushing part 111, an inclined pushing surface 112, an elastic reset element 13, a press-type connector 14, a press-unlock part 141, and an air pipe connector 15. 201 chassis, 202 extrusion assembly, 110 extrusion mechanism, 120 receiving cavity, 203 feeding assembly, 210 feeding channel, 300 elastic element, 400 triggering element, 500 detection element, 600 feed line tube, 700 feed port of the feeding device, 800 feed line resistance detection device, 900 hot end. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] The following is for reference. Figures 1-7 The material filament conveying device 100 for 3D printing equipment according to the present invention can buffer the movement of the material filament, thereby changing the length of the material filament's movement path, reducing the movement resistance of the material filament, and improving production efficiency and product quality. By setting the first elastic element 6 and the second elastic element 7, the movement of the sliding block 3 can be buffered, and the smoothness of the movement of the sliding block 3 can be ensured. The overall structure is relatively simple and easy to operate and implement.

[0034] like Figures 1-4 As shown, a filament conveying device 100 for a 3D printing equipment according to an embodiment of the present invention includes: a filament housing 1, a fixed pipe 2, a sliding block 3, a first elastic element 6, and a second elastic element 7.

[0035] A fixed pipe 2 is installed on the feed line housing 1. One end of the fixed pipe 2 is connected to one end of the feed pipe 4, and the other end of the feed pipe 4 is used to connect to the feeding assembly 203. A sliding block 3 is slidably installed on the feed line housing 1. A buffer cavity 31 communicating with the fixed pipe 2 is formed inside the sliding block 3. The end of the sliding block 3 away from the feed pipe 4 is also connected to one end of the discharge pipe communicating with the buffer cavity 31. The other end of the discharge pipe is used to couple the extrusion assembly 202. A first elastic element 6 and a second elastic element 7 are present. The elastic coefficient of the first elastic element 6 is greater than that of the second elastic element 7. The first elastic element 6 abuts against the side of the fixed pipe 2 and the sliding block 3 facing the feed pipe 4, and the second elastic element 7 abuts against the side of the feed line housing 1 and the sliding block 3 facing the discharge pipe. Alternatively, both the first elastic element 6 and the second elastic element 7 are disposed between the fixed pipe 2 and the sliding block 3, and the second elastic element 7 is sleeved outside the first elastic element 6 (not shown in the figure).

[0036] Specifically, the filament housing 1 provides an installation location for components within the filament conveying device 100 of the 3D printing equipment and protects them. Installing the fixed pipe 2 onto the filament housing 1 allows for the installation of the fixed pipe 2, which allows filament to pass through; that is, the fixed pipe 2 can be used to convey filament. One end of the fixed pipe 2 is connected to the feed pipe 4, and the other end of the feed pipe 4 is connected to the feeding assembly 203 via an air pipe connector 15. This allows the feeding assembly 203 to be connected to the fixed pipe 2 via an air inlet pipe, enabling the filament within the feeding assembly 203 to enter the fixed pipe 2 from the feed pipe 4 and be conveyed to other locations via the fixed pipe 2. At this time, the path length between the feeding assembly 203 and the fixed pipe 2 is fixed.

[0037] Meanwhile, a sliding block 3 is also provided inside the feed line housing 1. The sliding block 3 can slide relative to the feed line housing 1, and a buffer cavity 31 communicating with the fixed pipe 2 is formed inside the sliding block 3. This allows the other end of the fixed pipe 2 to be connected to the buffer cavity 31, so that the feed line in the feeding assembly 203 can further enter the buffer cavity 31. Moreover, at the end of the sliding block 3 away from the feed pipe 4, the buffer cavity 31 can also be connected to one end of the discharge pipe. This allows the buffer cavity 31 to be connected to both the fixed pipe 2 and the discharge pipe, so that the feed line entering the buffer cavity 31 from the fixed pipe 2 can enter the discharge pipe. The other end of the discharge pipe is used to couple the extrusion assembly 202, so that the other end of the discharge pipe is connected to the extrusion assembly 202. In other words, the buffer cavity 31 is connected to the extrusion assembly 202 through the discharge pipe, so that the feed line in the buffer cavity 31 can be transported from the discharge pipe to the extrusion assembly 202 to meet the user's needs. At this time, the path length between the end of the sliding block 3 connected to the discharge pipe and the discharge pipe is also fixed.

[0038] Furthermore, the feeding assembly 203, feed pipe 4, fixed pipe 2, buffer chamber 31, discharge pipe, and extrusion assembly 202 can be connected in sequence. The feeding assembly 203 can provide a material line, which can be transported to the extrusion assembly 202 in sequence through the feed pipe 4, fixed pipe 2, buffer chamber 31, and discharge pipe to meet the user's needs. During the process of the material line being transported from the feeding assembly 203 to the extrusion assembly 202, it can first be transported to the buffer chamber 31 of the sliding block 3. The sliding block 3 slides in the material line housing, which can change the length of the material line's movement path. The material line's transport path includes the feeding assembly 203 connecting the feed pipe to the fixed pipe 2, the fixed pipe 2 to the sliding block 3, and the sliding block 3 connecting the discharge pipe to the extrusion assembly 202. Since the lengths of the feed pipe 4 and the discharge pipe are fixed, the sliding block 3 slides in the material line housing 1, changing the distance between the fixed pipe 2 and the sliding block 3, which can also change the length of the material line's transport path.

[0039] Furthermore, the filament feeding device 100 for 3D printing equipment is equipped with a first elastic element 6 and a second elastic element 7. The elastic coefficient of the first elastic element 6 is configured to be greater than that of the second elastic element 7, so that the first elastic element 6 can withstand a larger force. Both the first elastic element 6 and the second elastic element 7 can be constructed as springs. Different spring coefficients mean that the deformation produced by the same force is different. Therefore, the different spring coefficients of the two elastic elements can distinguish between normal feeding and entanglement. For example, during normal feeding, the feeding assembly 203 feeds the filament to the extrusion assembly 202, and the movement path of the filament needs to be longer. The sliding block 3 compresses the second elastic element 7. When the feeding assembly 203 does not feed new filament, but the extrusion assembly 202 continues to extrude, the movement path of the filament needs to be shorter. At this time, the second elastic element 7 can recover its deformation by its own elasticity. If it is during normal feeding, new filament can be fed when the sliding block 3 returns to near its initial position. In this case, the first elastic element 6 will not work during normal feeding. If material entanglement occurs, the resistance of the material line will continue to increase. Then the sliding block 3 will compress the first elastic element 6. Since the resistance of material entanglement is relatively large, the first elastic element 6 with a larger spring coefficient is selected as the material entanglement buffer.

[0040] Specifically, the first elastic element 6 can be abutted between the fixed pipe 2 and the side of the sliding block 3 facing the feed pipe 4, thus placing the first elastic element 6 between the fixed pipe 2 and the sliding block 3. The second elastic element 7 can be abutted between the material line housing 1 and the side of the sliding block 3 facing the discharge pipe, thus placing the second elastic element 7 between the sliding block 3 and the discharge pipe. In other words, the first elastic element 6 and the second elastic element 7 are respectively placed at both ends of the sliding block 3. When no material is being fed, the sliding block 3 is in a free state, and the first elastic element 6 and the second elastic element 7 are relatively balanced at both ends of the sliding block 3. When normal material is being fed, the material... The wire enters the buffer chamber 31 and pushes the sliding block 3 towards the direction of the discharge pipe. At this time, the second elastic element 7 can be compressed to buffer the movement of the sliding block 3, so that the sliding block 3 can slide smoothly. When the resistance of the wire movement is too large, the amount of wire entering the buffer chamber 31 will decrease, or even no wire will enter the buffer chamber 31. That is, the pushing force of the wire on the sliding block 3 will decrease or even disappear. The second elastic element 7 can push the sliding block 3 towards the direction of the feed pipe 4 under the action of its own restoring force. At this time, the first elastic element 6 can be compressed to buffer the movement of the sliding block 3, so that the sliding block 3 can slide smoothly.

[0041] Alternatively, both the first elastic element 6 and the second elastic element 7 can be positioned between the fixed pipe 2 and the sliding block 3, with the second elastic element 7 fitted over the first elastic element 6 to ensure that both the first elastic element 6 and the second elastic element 7 can function normally. For example, the first elastic element 6 can be fixedly connected to the fixed pipe 2, and the second elastic element 7 can be fixedly connected to both the fixed pipe 2 and the sliding block 3. When no material is being fed, both the first elastic element 6 and the second elastic element 7 are in a balanced state. When material is being fed normally, the material line will push the sliding block 3 towards the direction of the discharge pipe. At this time, the second elastic element 7 can be stretched to buffer the movement of the sliding block 3. When the resistance of the material line is too great, the sliding block 3 can move towards the direction of the feed pipe 4 under the action of the second elastic element 7. At this time, the first elastic element 6 can be compressed to buffer the movement of the sliding block 3.

[0042] It should be noted that the elastic coefficient of the first elastic element 6 is constructed to be greater than that of the second elastic element 7, so that the first elastic element 6 can withstand the elastic force from the second elastic element 7. That is, whether the first elastic element 6 and the second elastic element 7 are respectively set at both ends of the sliding block 3, or both the first elastic element 6 and the second elastic element 7 are set between the fixed pipe 2 and the sliding block 3, it can be ensured that the first elastic element 6 can withstand the elastic force of the second elastic element 7, thereby ensuring the reliability of the movement of the sliding block 3 being buffered by the first elastic element 6 and the second elastic element 7.

[0043] According to the embodiment of the present invention, the filament conveying device 100 for 3D printing equipment can buffer the movement of the filament by setting a buffer cavity 31, thereby changing the length of the filament's movement path, reducing the filament's movement resistance, and improving production efficiency and product quality. The movement of the sliding block 3 can be buffered by setting a first elastic member 6 and a second elastic member 7. Regardless of the setting position of the first elastic member 6 and the second elastic member 7 in the filament conveying device 100 for 3D printing equipment, the smoothness of the movement of the sliding block 3 can be ensured. The overall structure is relatively simple and easy to operate and implement.

[0044] In some embodiments, the filament conveying device 100 for a 3D printing equipment further includes: a first detection element 8 and a first trigger element 9. The first detection element 8 is disposed in one of the filament housing 1 and the sliding block 3, and the first trigger element 9 is disposed in the other of the sliding block 3 and the filament housing 1. The first detection element 8 is used to detect the relative distance or change in relative distance with the first trigger element 9, so as to detect the change in relative distance or change in relative distance between the extrusion assembly 202 and the feeding assembly 203.

[0045] Specifically, the filament conveying device 100 for 3D printing equipment is provided with a first detection element 8 and a first trigger element 9. The first detection element 8 can detect the relative distance between itself and the first trigger element 9. That is, the first detection element 8 can be used to detect the relative distance or the change of the relative distance between the first detection element 8 and the first trigger element 9. The first detection element 8 can be set on the filament housing 1 and the first trigger element 9 can be set on the sliding block 3, or the first detection element 8 can be set on the sliding block 3 and the first trigger element 9 can be set on the filament housing 1. In both cases, the first detection element 8 and the first trigger element 9 can be set. During the sliding process, the sliding block 3 will drive the first detection element 8 or the first trigger element 9 connected to it to move, thereby changing the relative distance between the first detection element 8 and the first trigger element 9, so that the first detection element 8 can obtain different detection results.

[0046] For example, such as Figures 1-2 As shown, the first detection element 8 can be set on the feed line housing 1, and the first trigger element 9 can be set on the sliding block 3. This will fix the first detection element 8 to the feed line housing 1 and the first trigger element 9 to the sliding block 3, ensuring the reliability of the operation of the first detection element 8 and the first trigger element 9. When the sliding block 3 moves relative to the feed line housing 1, the relative distance between the first detection element 8 and the first trigger element 9 will change, causing the detection result of the first detection element 8 to change. That is, the first detection element 8 can detect the relative distance or the change of the relative distance between itself and the first trigger element 9.

[0047] Furthermore, when the sliding block 3 moves relative to the feed line housing 1, the sliding block 3 will move closer to the feed pipe 4 or the discharge pipe. When the sliding block 3 moves closer to the discharge pipe, the distance between the sliding block 3 and the feeding assembly 203 will increase, that is, the distance between the feeding assembly 203 and the extrusion assembly 202 will increase. When the sliding block 3 moves closer to the feed pipe 4, the distance between the sliding block 3 and the feed pipe 4 will decrease, that is, the distance between the feeding assembly 203 and the extrusion assembly 202 will decrease. In other words, during the sliding process of the sliding block 3, the relative distance between the first trigger 9 and the first detection 8 connected to the sliding block 3 will change. At the same time, the distance between the feeding assembly 203 and the extrusion assembly 202 will also change. Thus, the relative distance or the change in relative distance between the extrusion assembly 202 and the feeding assembly 203 can be indirectly detected by the first detection 8, thereby allowing the determination of the magnitude of the movement resistance of the feed line.

[0048] In some embodiments, the first elastic member 6 is in a compressed state, and / or the second elastic member 7 is in a compressed state.

[0049] Specifically, such as Figures 1-3As shown, when the first elastic element 6 and the second elastic element 7 are respectively set at both ends of the sliding block 3, during normal feeding, the sliding block 3 can move towards the discharge pipe under the thrust of the material line. At this time, the sliding block 3 can compress the second elastic element 7, so that the second elastic element 7 is in a compressed state. When the resistance of the material line is too large, the sliding block 3 can move towards the feed pipe 4 under the action of the second elastic element 7. At this time, the sliding block 3 can compress the first elastic element 6, so that the first elastic element 6 is in a compressed state.

[0050] Alternatively, when both the first elastic element 6 and the second elastic element 7 are positioned between the sliding block 3 and the fixed pipe 2, during normal feeding, the sliding block 3 can move towards the discharge pipe under the thrust of the material line. At this time, the sliding block 3 can stretch the second elastic element 7. When the resistance of the material line is too great, the sliding block 3 can move towards the feed pipe 4 under the action of the second elastic element 7. At this time, the sliding block 3 can simultaneously compress the first elastic element 6 and the second elastic element 7.

[0051] In some embodiments, when the second elastic member 7 is sleeved outside the first elastic member 6, there is a sliding distance between the sliding block 3 and the feed line housing 1.

[0052] Specifically, when the second elastic element 7 is sleeved outside the first elastic element 6, both the first elastic element 6 and the second elastic element 7 can be set between the sliding block 3 and the fixed pipe 2. At this time, there is a certain distance between the end of the sliding block 3 facing the discharge pipe and the end of the material line housing 1 facing the discharge pipe, that is, there is a sliding distance between the sliding block 3 and the material line housing 1, so as to provide sufficient sliding space for the sliding block 3, thereby ensuring that during the normal feeding process, the sliding block 3 can slide towards the discharge pipe under the thrust of the material line.

[0053] In some embodiments, the filament conveying device 100 for a 3D printing equipment further includes a second detection element 10 and a second trigger element 11; the second detection element 10 is fixed relative to the fixed pipe 2, and the second trigger element 11 is movably installed in the fixed pipe 2 along an axial direction perpendicular to the fixed pipe 2 and extends at least partially into the fixed pipe 2; wherein the filament is conveyed in the fixed pipe 2 along the axial direction of the fixed pipe 2.

[0054] Specifically, by fixing the second detection element 10 relative to the fixed pipe 2, the second detection element 10 and the fixed pipe 2 can be fixedly connected. By movably installing the second trigger element 11 in the fixed pipe 2 along the axial direction perpendicular to the fixed pipe 2, the second trigger element 11 can be movably connected to the side wall of the fixed pipe 2, and the second trigger element 11 can move along the axial direction perpendicular to the fixed pipe 2. The second trigger element 11 can be partially extended into the fixed pipe 2, or the second trigger element 11 can be fully extended into the fixed pipe 2, so as to achieve a reliable connection between the second trigger element 11 and the fixed pipe 2.

[0055] Furthermore, the feed line can be transmitted in the fixed pipe 2 along the axial direction of the fixed pipe 2, that is, the direction of movement of the feed line is along the axial direction of the fixed pipe 2, and at least a portion of the second trigger 11 extends into the fixed pipe 2, so that at least a portion of the second trigger 11 can block the movement of the feed line in the fixed pipe 2, that is, the feed line entering the fixed pipe 2 from the feed pipe 4 can generate a thrust on the second trigger 11 and push the second trigger 11 to move.

[0056] In some embodiments, the second detection element 10 is used to detect the relative distance or the change in relative distance with the second trigger element 11 to detect whether the material line has entered the fixed pipe 2.

[0057] Specifically, the second detection element 10 can detect the relative distance between itself and the second trigger element 11. That is, the second detection element 10 can be used to detect the relative distance or changes in the relative distance between itself and the second trigger element 11. The second detection element 10 and the second trigger element 11 can be spaced apart along the axial direction perpendicular to the fixed pipe 2, and the second detection element 10 is fixedly connected to the fixed pipe 2. At least a portion of the second trigger element 11 can be movably extended into the fixed pipe 2. During normal feeding, the material line entering the fixed pipe 2 can push the second trigger element 11, causing the second trigger element 11 to move towards the second detection element 10, thereby changing the relative distance between the second detection element 10 and the second trigger element 11. This allows the second detection element 10 to obtain different detection results. Thus, it can be determined whether a material line has entered the fixed pipe 2 based on the detection results of the second detection element 10. In other words, the second detection element 10 can be used to detect whether a material line has entered the fixed pipe 2.

[0058] In some embodiments, the feed line conveying device 100 for a 3D printing equipment further includes an elastic reset member 13, one end of which is fixed relative to the fixed pipe 2, and the other end of which is connected to the second trigger member 11.

[0059] Specifically, the material line inside the fixed pipe 2 can push the second trigger 11 to move towards the second detection element 10, such as... Figures 1-2 and Figure 7As shown, the material conveying device 100 for 3D printing equipment is also provided with an elastic reset member 13. The elastic reset member 13 is arranged in an axial direction perpendicular to the fixed pipe 2. One end of the elastic reset member 13 is fixed relative to the fixed pipe 2, so that one end of the elastic reset member 13 is relatively fixed to the fixed pipe 2. The other end of the elastic reset member 13 is connected to the second trigger member 11, so that the other end of the elastic reset member 13 is fixedly connected to the second trigger member 11. This enables the setting of the elastic reset member 13 and ensures the reliability of the operation of the elastic reset member 13.

[0060] For example, such as Figures 1-2 and Figure 7 As shown, the elastic reset member 13 can be disposed between the second detection member 10 and the second trigger member 11. When the second trigger member 11 moves toward the second detection member 10 under the thrust of the material line, the elastic reset member 13 can be compressed. At this time, the elastic reset member 13 can apply an elastic force toward the fixed pipe 2 to the second trigger member 11 under the action of its own restoring force, and can push the second trigger member 11 toward the fixed pipe 2 when the resistance of the material line movement is too large. The elastic reset member 13 can be constructed as a spring.

[0061] In some embodiments, the second trigger member 11 is formed with an inclined pushing part 111, the inclined pushing part 111 is formed with an inclined pushing surface 112, and the inclined pushing surface 112 is inclined along the feeding direction of the feed line.

[0062] Specifically, the second trigger 11 can move towards the second detection element 10 under the thrust of the feed line. An inclined pushing part 111 is formed on the second trigger 11. Extending the inclined pushing part 111 into the fixed pipe 2 allows the feed line entering the fixed pipe 2 to push the inclined pushing part 111, causing the second trigger 11 to move towards the second detection element 10. Simultaneously, an inclined pushing surface 112 is formed on the inclined pushing part 111. The inclined pushing surface 112 increases the contact area between the feed line and the inclined pushing part 111, improving the reliability of the feed line pushing the inclined pushing part 111. Furthermore, the inclined pushing surface 112 is inclined along the feed direction of the feed line, so that the feed line pushes the inclined pushing part 111 through the inclined pushing surface 112 during the feeding process. This ensures the reliability of the second trigger 11 moving towards the second detection element 10 under the thrust of the feed line. The inclined pushing surface 112 allows for pushing the inclined pushing part 111 away with a smaller thrust, preventing the trigger from obstructing the feed line.

[0063] In some embodiments, the filament conveying device 100 for a 3D printing equipment further includes a press-type connector 14 for connecting the sliding block 3 and the discharge tube. The press-type connector 14 includes a press-unlocking portion 141. The filament housing 1 is provided with an exposed opening 101 in the axial direction along the discharge tube. The diameter of the exposed opening 101 is larger than the diameter of the press-unlocking portion 141.

[0064] Specifically, the press-type connector 14 is used to connect the sliding block 3 and the discharge pipe, so that the buffer chamber 31 and the discharge pipe can be connected through the press-type connector 14, thereby ensuring the reliability of the material line entering the discharge pipe from the buffer chamber 31. The press-type connector 14 is connected to the sliding block 3, so that the press-type connector 14 can move under the drive of the sliding block 3. At the same time, the press-type connector 14 is provided with a press-unlocking part 141, which is used to unlock the discharge pipe when pressed, so that the discharge pipe can be removed for maintenance. The press-unlocking part 141 can extend to the outside of the material line housing 1, so that the user can easily operate the press-unlocking part 141.

[0065] Furthermore, an exposed opening 101 is provided on the feed line housing 1, which connects the inner and outer sides of the feed line housing 1 and allows at least a portion of the press-type connector 14 to pass through. By setting the exposed opening 101 on the feed line housing 1 along the axial direction of the discharge pipe, the exposed opening 101 can be positioned on the movement path of the press-type connector 14, so that at least a portion of the press-type connector 14 can extend from the exposed opening 101. Also, the press-unlocking portion 141 is the part with the largest diameter on the press-type connector 14. By constructing the diameter of the exposed opening 101 to be larger than the diameter of the press-unlocking portion 141, it is easy for at least a portion of the press-type connector 14 to extend from the exposed opening 101.

[0066] It should be noted that the press-type connector 14 is used to connect the sliding block 3 and the discharge pipe. When the discharge pipe needs to be inspected, at least a portion of the press-type connector 14, including the press-unlocking part 141, can be extended out of the outside of the material line housing 1. Then, by pressing the press-unlocking part 141, the discharge pipe can be unlocked from the press-type connector 14, and the discharge pipe can be easily pulled off the press-type connector 14 for inspection, which can reduce the later maintenance cost.

[0067] In some embodiments, the sliding block 3 is further provided with a pushing protrusion 32, which extends to the outside of the material line housing 1 in a direction perpendicular to the axial direction of the discharge pipe.

[0068] Specifically, the push handle 32 provides a position for the user to operate. By extending the push handle 32 along the axial direction perpendicular to the discharge pipe to the outside of the material line housing 1, the push handle 32 is exposed to the user, allowing the user to operate the push handle 32. The push handle 32 is also mounted on the sliding block 3, allowing the user to operate the sliding block 3 and, consequently, the press-type connector 14 on the sliding block 3. Furthermore, when the user applies force to the push handle 32, the force is transmitted from the push handle 32 to the press-type connector 14 through the sliding block 3, causing the push handle 32 to move the sliding block 3 and the press-type connector 14 together toward the discharge pipe. This allows at least a portion of the press-unlocking part 141 on the press-type connector 14 to extend to the outside of the material line housing 1, facilitating the user to separate the discharge pipe from the press-type connector 14 for inspection / replacement of the discharge pipe. The user can pull out the discharge tube by pinching the protruding handle 32 and pressing the unlocking part 141 at the same time.

[0069] Furthermore, it should be noted that when the discharge pipe needs to be inspected, the push protrusion 32 can be pushed to make at least a portion of the press-to-unlock part 141 on the press-type connector 14 extend out of the material line housing 1. Then, by pinching the push protrusion 32 and the press-to-unlock part 141, the press-to-unlock part 141 is pressed to unlock the discharge pipe from the press-type connector 14. The discharge pipe can then be easily pulled off the press-type connector 14, allowing the discharge pipe to be disassembled for inspection, which can reduce the later maintenance cost.

[0070] In some embodiments, the feed line housing 1 also forms a limiting flange 102, which consists of two sets and is spaced apart. The sliding block 3 is limited and installed between the two sets of limiting flanges 102 and can slide along the limiting flange 102.

[0071] Specifically, the limiting flange 102 can be used to limit the sliding block 3. The limiting flange 102 is formed on the feed line housing 1, which allows the limiting flange 102 to be relatively fixed to the feed line housing 1, thereby improving the reliability of the limiting flange 102 in limiting the sliding block 3. Furthermore, by setting two sets of limiting flanges 102, the sliding block 3 can be limited by both sets of limiting flanges 102, further improving the reliability of the limiting flange 102 in limiting the sliding block 3. Simultaneously, the two sets of limiting flanges... The two sets of limiting flanges 102 are spaced apart, so that there is a certain distance between them. This allows the sliding block 3 to be limited and installed between the two sets of limiting flanges 102. The two sets of limiting flanges 102 can simultaneously limit the sliding block 3 from both sides. The sliding block 3 can slide along the limiting flanges 102 between the two sets of limiting flanges 102. The two sets of limiting flanges 102 can guide the movement of the sliding block 3, thereby improving the accuracy of the movement direction of the sliding block 3.

[0072] In some embodiments, each set of limiting flanges 102 includes a first flange 1021 and a second flange 1022. The first flange 1021 and the second flange 1022 are spaced apart along the sliding direction of the sliding block 3 and have an intermediate gap 1023. The sliding block 3 is adapted to slide into the second flange 1022 from the end away from the first flange 1021, and the sum of the extension length of the first flange 1021 and the length of the intermediate gap 1023 is less than the extension length of the sliding block 3.

[0073] Specifically, by distributing the first flange 1021 and the second flange 1022 at intervals along the sliding direction of the sliding block 3, the end of the sliding block 3 facing the discharge pipe and the end away from the discharge pipe can slide along the first flange 1021 and the second flange 1022 respectively. Thus, the two first flanges 1021 and the two second flanges 1022 can guide the end of the sliding block 3 facing the discharge pipe and the end away from the discharge pipe respectively, effectively improving the reliability of the two sets of limiting flanges 102 in guiding the movement of the sliding block 3. Furthermore, by forming an intermediate gap 1023 between the first flanges 1021 and the second flanges 1022, the end of the sliding block 3 away from the discharge pipe can be prevented from sliding between the two first flanges 1021. This ensures that the two first flanges 1021 and the two second flanges 1022 can guide the end of the sliding block 3 facing the discharge pipe and the end away from the discharge pipe respectively.

[0074] Furthermore, by sliding the sliding block 3 into the second flange 1022 from the end away from the first flange 1021, the end of the sliding block 3 facing the discharge pipe can be slid into the second flange 1022 from the end away from the first flange 1021. This allows the sliding block 3 to be positioned between the two sets of limiting flanges 102. The sum of the extension length of the first flange 1021 and the length of the intermediate gap 1023 is less than the extension length of the sliding block 3. This ensures that when the sliding block 3 slides to its limit position towards the discharge pipe, the end of the sliding block 3 away from the discharge pipe will not come off from the second flange 1022. This ensures the smoothness of the movement of the sliding block 3 and prevents the sliding block 3 from coming off from the limiting flange 102.

[0075] In some embodiments, the feed line housing 1 is further provided with a first limiting part 103, and the sliding block 3 presses against the first limiting part 103 when it moves to the limit position in the direction close to the feed pipe 4.

[0076] Specifically, the first limiting part 103 is used to limit the sliding block 3 when it moves to the limit position. By setting the first limiting part 103 inside the feed line housing 1, the first limiting part 103 can be fixed relative to the feed line housing 1 to ensure the reliability of the first limiting part 103 in limiting the sliding block 3. When the sliding block 3 moves to the limit position in the direction closer to the feed pipe 4, it presses against the first limiting part 103. That is, when the sliding block 3 moves to the limit position in the direction closer to the feed pipe 4, the first limiting part 103 can limit the sliding block 3, which can prevent the sliding block 3 from coming out of the limiting flange 102 due to the excessively long movement path of the sliding block 3.

[0077] In some embodiments, the first limiting part 103 is constructed as a triangular block and has a relief slope 1031, which is inclined along the feeding direction of the fixed pipe 2.

[0078] Specifically, the first limiting part 103 is used to limit the sliding block 3 when it moves to its limit position in the direction close to the feed pipe 4, such as... Figures 3-4 As shown, the first limiting part 103 can be constructed as a triangular block, and an avoidance slope 1031 is formed on the first limiting part 103. The avoidance slope 1031 is inclined along the feeding direction of the fixed pipe 2, so that the avoidance slope 1031 is set on the side of the triangular block near the feed pipe 4, so that the avoidance slope 1031 can be used to avoid the fixed pipe 2 and the second detection element 10 and other components, ensuring the reliable operation of the second detection element 10 and other components. At the same time, the side of the first limiting part 103 facing the sliding block 3 can be made into a plane to ensure the reliability of the first limiting part 103 in limiting the sliding block 3.

[0079] It should be noted that the shape of the first limiting part 103 is not limited to that described in this embodiment. In actual design, it can be flexibly set on the premise of limiting the sliding block 3 and avoiding the components in the material line housing 1.

[0080] In some embodiments, the first trigger 9 has a first sensing end 91 and a second sensing end 92, the first sensing end 91 and the second sensing end 92 are spaced apart along the sliding direction of the sliding block 3, and the first detection element 8 is located between the first sensing end 91 and the second sensing end 92; wherein, when the sliding block 3 moves to its limit position in the direction close to the feed pipe 4, the first detection element 8 generates a first entanglement signal, and when the sliding block 3 moves to its limit position in the direction close to the discharge pipe, the first detection element 8 generates a second entanglement signal.

[0081] Specifically, the first trigger 9 can cooperate with the first detection element 8 to detect the current position of the sliding block 3. The first trigger 9 has a first sensing end 91 and a second sensing end 92. The first sensing end 91 and the second sensing end 92 are spaced apart along the sliding direction of the sliding block 3, and the first trigger 9 and the first detection element 8 are spaced apart along the sliding direction perpendicular to the sliding block 3. This allows the first sensing end 91 and the second sensing end 92 to both face the first detection element 8, so that the first detection element 8 can detect the distance to the first sensing end 91 and the second sensing end 92. Furthermore, by placing the first detection element 8 between the first sensing end 91 and the second sensing end 92, the distance between the first detection element 8 and the first sensing end 91 and the second sensing end 92 is relatively close, which facilitates the first detection element 8 to detect the distance to the first sensing end 91 and the second sensing end 92 simultaneously.

[0082] Meanwhile, the end closer to the feed pipe 4 can be designated as the first sensing end 91, and the end closer to the discharge pipe as the second sensing end 92. When the sliding block 3 moves to its limit position in the direction closer to the feed pipe 4, the distance between the first detection element 8 and the first sensing end 91 increases, and the distance between the first detection element 8 and the second detection element 10 decreases. At this time, the first detection element 8 can generate a first entanglement signal. Conversely, when the sliding block 3 moves to its limit position in the direction closer to the discharge pipe, the distance between the first detection element 8 and the first sensing end 91 decreases, and the distance between the first detection element 8 and the second sensing end 92 increases. At this time, the first detection element 8 can generate a second entanglement limit signal.

[0083] It should be noted that when the sliding block 3 moves to its limit position in the direction of approaching the feed pipe 4, the resistance of the material line is too great, that is, the first entanglement signal can be the feeding signal. When the sliding block 3 moves to its limit position in the direction of approaching the discharge pipe, the material line can feed normally, that is, the second entanglement signal can be the feeding signal.

[0084] This utility model also proposes a 3D printing device 200.

[0085] The 3D printing equipment 200 according to an embodiment of the present utility model includes a feeding component 203, an extrusion component 202, and a material conveying device 100 for 3D printing equipment, any one of the above. The feeding component 203 is connected to the feed pipe 4, and the extrusion component 202 is connected to the discharge pipe.

[0086] Specifically, the feeding assembly 203 is connected to the feed pipe 4, allowing the feeding filament to be fed into the feed pipe 4. Simultaneously, the extrusion assembly 202 is connected to the discharge pipe, allowing the feeding filament to be transported to the extrusion assembly 202 through the discharge pipe, thus providing the feeding filament for the extrusion assembly 202 and meeting the user's needs. Furthermore, a filament conveying device 100 for 3D printing equipment is provided between the feeding assembly 203 and the extrusion assembly 202, allowing the feeding filament to be transported from the feeding assembly 203 to the extrusion assembly 202. This shortens the movement path of the feeding filament, reduces its movement resistance, improves production efficiency and product quality, and buffers the movement of the sliding block 3, ensuring the smoothness of its movement.

[0087] In some embodiments, the 3D printing equipment 200 further includes a control module, the feeding assembly 203 is provided with a feeding drive, and the extrusion assembly 202 is provided with a discharging drive; wherein, the control module is used to control the operation of the feeding drive and / or the discharging drive.

[0088] Specifically, a feeding drive is provided in the feeding assembly 203, which can provide driving force to the material line in the feeding assembly 203 to transport the material line. A discharging drive is provided at the extrusion assembly 202, which can provide driving force to the material line at the extrusion assembly 202. The feeding drive and the discharging drive can ensure reliable material line transport, thereby ensuring smooth printing process. The control module can be electrically connected to the first detection element 8 so that the first winding signal or the second winding signal generated by the first detection element 8 can be transmitted to the control module, so that the control module can control the operation of the feeding drive and the discharging drive according to the first winding signal and the second winding signal respectively.

[0089] Furthermore, the control module can drive the feeding drive to move according to the first winding signal, so as to transport the material line from the feeding assembly 203 to the buffer chamber 31. Alternatively, the control module can drive the discharging drive to move according to the second winding signal, so as to transport the material line from the buffer chamber 31 to the extrusion assembly 202.

[0090] In some embodiments, there are two feed line conveyors 100 for 3D printing equipment, and the two feed line conveyors 100 for 3D printing equipment are arranged side by side.

[0091] Specifically, the filament conveying device 100 for 3D printing equipment is used to convey the filament, such as... Figures 5-6As shown, two filament conveying devices 100 can be simultaneously installed in the 3D printing equipment 200. These devices can convey filament separately or simultaneously. By arranging the two devices side-by-side, or by spacing them apart, interference between them can be avoided, preventing filament conveying failure. Furthermore, both devices can convey multiple filaments simultaneously, improving printing efficiency and preventing printing interruptions. When one filament conveyor is replaced or repaired, the other can continue operating, reducing downtime due to maintenance. Additionally, the two devices can be controlled independently, enhancing the flexibility and adaptability of the printing process.

[0092] It should be noted that, in actual design, the material line housings 1 of the two material line conveying devices 100 used for 3D printing equipment can also be integrated.

[0093] In some embodiments, the 3D printing equipment 200 further includes a chassis 201, with a feed line conveyor 100 for the 3D printing equipment located inside the chassis 201.

[0094] Specifically, the filament conveyor 100 for the 3D printing equipment is located inside the chassis 201. This provides space for the filament conveyor 100 and protects it from damage or failure due to accidental bumps. Furthermore, the filament conveyor 100 can be positioned towards the front of the chassis 201, i.e., towards the user, to facilitate observation and maintenance.

[0095] In some embodiments, the chassis 201 is provided with an openable door, and the sliding block 3 is provided with a push protrusion 32, which protrudes toward the door.

[0096] Specifically, the chassis 201 is provided with an openable and closable door, which can be used to open or close the chassis 201. When the chassis 201 is open, the material conveying device 100 for the 3D printing equipment can be set or moved out. When the door is closed, the material conveying device 100 for the 3D printing equipment can be protected. The push protrusion 32 on the sliding block 3 is set towards the door so that the user can operate the push protrusion 32 when the door is open. By pushing the protrusion 32, the sliding block 3 drives the press-type connector 14 to move, so that at least part of the press-type connector 14 can be extended to the outside of the material line housing 1, so that the user can separate the discharge pipe from the press-type connector 14 and perform maintenance on the discharge pipe.

[0097] Reference Figure 8 The diagram shows a structural schematic of a material line resistance detection device according to the present invention. The material line resistance detection device may specifically include the following components: The extrusion assembly 202 is equipped with an extrusion mechanism 110, which is used to drive the material line to the hot end. The heating block on the hot end can heat the material line and extrude it to form a three-dimensional model.

[0098] The feeding assembly 203 is provided with a feeding channel 210. The inlet of the feeding channel 210 is used to receive the feed line from the feeding device, and the outlet of the feeding channel 210 faces the extrusion assembly 202. The extrusion assembly 202 can move relative to the feeding assembly 203 along the direction of the feed line in the feeding channel 210. The feed line from the feeding device is conveyed from the feed port 700 of the feeding device to the inlet of the feeding channel 210.

[0099] The feeding channel 210 has at least one inlet and one outlet, meaning that the feeding channel 210 can be a feeding channel for single-line materials or a feeding channel for multi-line materials.

[0100] An elastic element 300 is provided, with one end connected to the extrusion assembly 202 and the other end connected to the feeding assembly 203, to prevent the extrusion assembly 202 and the feeding assembly 203 from approaching each other in the direction of the material line in the feeding channel 210. The elastic element 300 may be disposed between the extrusion assembly 202 and the feeding assembly 203.

[0101] The trigger element 400 is disposed in one of the extrusion assembly 202 or the feeding assembly 203.

[0102] The detection element 500, disposed in another of the extrusion assembly 202 or the feeding assembly 203, is used to detect the relative distance or change in the relative distance between the extrusion assembly 202 and the feeding assembly 203 by detecting the relative distance with respect to the trigger element 400.

[0103] In some feasible implementations, the wire resistance detection device can be located at any position along the wire's transport path. The triggering element and the detection element can also be located at any position along the wire's transport path. For example, they can be located in the wire box, on the chassis of the 3D printing equipment, or on the wire support, etc.

[0104] For example, the trigger element 400 is disposed on the extrusion assembly 202, and the detection element 500 is disposed on the feeding assembly 203. The trigger element 400 and the detection element 500 are paired parts.

[0105] The wire is usually wound on a spool, layered on top of each other, with the end of the wire fixed to the spool. If the wire slips out of the spool during printing, or if the end of the wire is fixed to the spool and cannot be released after use, the wire resistance will increase or the wire will get stuck. Since the extrusion component 202 and the feeding component 203 can move when the wire resistance is too high, the magnitude of the wire resistance can be determined by the relative distance between the extrusion component 202 and the feeding component 203.

[0106] In an optional implementation of this utility model, the feeding device has a material tray.

[0107] In this invention, the feeding device has a material tray on which wire is wound.

[0108] In an optional implementation of this utility model, the feed line of the feed tray is fed from the feed port of the feeding device to the feed port of the feeding channel 210. A feed line tube 600 is provided between the feed port of the feeding device and the feed port of the feeding channel 210, such that the length of the feed line between the feed port of the feeding device and the feed port of the feeding channel 210 is the length of the feed line tube 600.

[0109] By setting up the feed tube 600, the filament fed from the feed port of the feeding device is guided by the feed tube 600 to the feed inlet of the feeding channel 210. When the resistance of the filament increases, a force is generated that causes the distance between the feed tray and the extrusion assembly 202 to shorten. Since the length of the feed tube 600 remains constant, the feeding assembly 203 will move closer to the extrusion assembly 202, thus changing the relative distance between the feeding assembly 203 and the extrusion assembly 202. Therefore, the increase in filament resistance can be determined based on the shortening of the relative distance between the feeding assembly 203 and the extrusion assembly 202. Furthermore, due to the presence of the elastic element 300, the greater the change in the relative distance between the feeding assembly 203 and the extrusion assembly 202, the greater the resistance, thus allowing the magnitude of the resistance to be determined. Moreover, the reduction in the relative distance between the extrusion assembly 202 and the feeding assembly 203 caused by excessive resistance can buffer the effects of excessive resistance, providing time for timely response during high-speed printing.

[0110] In an optional implementation of this utility model, the extrusion assembly 202 is provided with a receiving cavity 120, and the discharge port of the feeding assembly 203 is sleeved within the receiving cavity 120.

[0111] The extrusion assembly 202 has a receiving cavity 120 inside, which can be an open receiving cavity 120, such as... Figure 1 As shown, the receiving cavity 120 has no top surface. The discharge port of the feeding assembly 203 is fitted inside the receiving cavity 120. This structure can stabilize the spatial relationship between the feeding assembly 203 and the extrusion assembly 202.

[0112] In an optional implementation of this utility model, a groove is provided in the receiving cavity 120, which is used to guide the direction of relative movement between the extrusion assembly 202 and the feeding assembly 203.

[0113] A chute is provided inside the receiving cavity 120, and the protrusion on the outer side of the feeding component 203 can be slidably connected to the chute. When the extrusion component 202 and the feeding component 203 move relative to each other, the chute guides the direction of their relative movement and prevents the extrusion component 202 and the feeding component 203 from being misaligned.

[0114] Specifically, the chute is an elongated hole, and the trigger element 400 is disposed on a protrusion on the outer side of the feeding assembly 203. The protrusion extends into the chute for sliding connection. The detection element 500 may be disposed on the elongated hole. The chute is an opening communicating with the outside of the receiving cavity for detection by the detection element 500.

[0115] The chute is an elongated hole, and the feeding assembly 203 moves along the axial direction of the chute. The trigger element 400 can be disposed on a protrusion on the outer side of the feeding assembly 203, which protrudes into the chute. The detection element 500 is disposed on the elongated hole so that when the feeding assembly 203 and the extrusion assembly 202 move relative to each other, the detection element 500 can directly detect the relative distance between the trigger element 400 and the extrusion assembly 202.

[0116] Furthermore, a limiting member can be provided on the receiving cavity 120 of the extrusion assembly 202 to restrict the sliding position of the feeding assembly 203 when it moves away from the extrusion assembly 202, thus preventing the feeding assembly 203 from dislodging from the receiving cavity 120. This limiting member can be an inclined surface that contacts the feeding assembly 203.

[0117] The limiting member can also be a cover with a through hole in the receiving cavity 120. This cover can be snapped onto the receiving cavity 120. The middle of the discharge port of the feeding assembly 203 can pass through this through hole, but the end of the discharge port of the feeding assembly 203 near the extrusion assembly 202 has a protrusion, preventing the discharge port from detaching from the through hole of the cover. Specifically, the side of the discharge port near the extrusion assembly 202 has a protrusion, and the through hole of the cover has an opening allowing the protrusion to pass through. This allows the protrusion and the opening to align when the discharge port rotates relative to the cover to a first angle, enabling the discharge port to detach from the through hole. However, when the discharge port rotates relative to the cover to a second angle, the discharge port cannot detach from the through hole of the cover. Furthermore, when the cover is snapped onto the receiving cavity 120, the inner wall of the receiving cavity can limit the protrusion, preventing it from aligning with the opening. In other words, the discharge port cannot rotate relative to the cover to the first angle but is restricted to the second angle.

[0118] In one optional implementation of this utility model, such as Figure 8 As shown, the discharge port of the feeding assembly 203 is cylindrical, and the elastic element 300 includes a spring. One end of the spring is sleeved on the discharge port, and the other end abuts against the extrusion assembly 202.

[0119] like Figure 8 As shown, the elastic element 300 can be, for example, a cylindrical helical spring. Specifically, the extrusion assembly 202 may have an annular protrusion matching the size of the spring, and the spring can abut against the inside or outside of the annular protrusion. Specifically, the annular protrusion may also form a groove with the inner wall of the receiving cavity 120 to receive the other end of the spring.

[0120] When there is no resistance or minimal resistance in the feed line, the spring, based on its own elastic force, holds the feeding assembly 203 within the receiving cavity 120, preventing the feeding assembly 203 from sliding down due to its own gravity and causing relative movement with the extrusion assembly 202, thus affecting the detection results. When the feed line encounters resistance or excessive resistance, the relative movement between the feeding assembly 203 and the extrusion assembly 202 compresses the spring. When the resistance is eliminated, the spring, based on the elastic force generated by the compression, resets the feeding assembly 203 and the extrusion assembly 202, ensuring automatic reset after the abnormal resistance situation is resolved. Furthermore, due to the presence of the spring, a smaller relative distance indicates greater resistance. Therefore, the magnitude of the resistance can be determined, allowing for early detection and warning before it affects printing, thereby preventing print quality from being compromised. Furthermore, if abnormal resistance occurs, the relative movement between the feeding component 203 and the extrusion component 202 allows the material line between them to be temporarily used for printing, thus providing time to react promptly during high-speed printing, such as pausing printing and informing the user.

[0121] In an optional implementation of this utility model, the extrusion mechanism 110 includes a first extrusion wheel and a second extrusion wheel symmetrically arranged based on the material line, and the first extrusion wheel and the second extrusion wheel jointly extrude the material line.

[0122] In this invention, the extrusion mechanism 110 may include a first extrusion wheel and a second extrusion wheel. The first and second extrusion wheels are symmetrically arranged relative to the feed line. The first and second extrusion wheels jointly extrude the feed line; that is, both sides of the feed line are compressed, thereby uniformly pulling the feed line, making the movement of the feed line smoother, reducing interference from the detection of feed line resistance, and resulting in more accurate results. In addition, the gap between the first and second extrusion wheels can be slightly smaller than the width of the feed line, so that the feed line can be conveyed based on friction.

[0123] In an optional implementation of this utility model, the trigger element 400 includes a magnetic element; Correspondingly, the detection element 500 includes a Hall sensor for detecting the distance to the magnetic element.

[0124] The trigger element 400 can be, for example, a magnet. The magnetic element is embedded in the feeding assembly 203, i.e., fixed within it. Correspondingly, the detection element 500 includes a Hall sensor. Based on the Hall principle, when the magnetic element approaches the Hall detection circuit in the Hall sensor, the magnetic field changes, and the output voltage of the Hall detection circuit changes accordingly. The relative distance between the magnetic element and the Hall element can be determined by the output voltage of the Hall detection circuit, thereby determining the wire resistance. The magnetic element can be disposed on a protrusion on the outer side of the feeding assembly 203, the protrusion protruding into a groove with an opening on the outer wall of the extrusion assembly 202 for sliding connection to the groove. The Hall sensor can be disposed outside the groove. The magnetic element can also be embedded in the feeding channel 210. To enable those skilled in the art to understand the detection process of this utility model, refer to... Figure 1 The following explanation uses a Hall sensor as the detection element 500 and a magnetic element as the trigger element 400 as an example: When the 3D printer is working normally, the extrusion assembly 202 pulls the material line to move. If there is no resistance or very little resistance in the material line, the spring will prevent the relative movement between the feeding assembly 203 and the extrusion assembly 202. The feeding assembly 203 is located above the receiving cavity 120. At this time, the Hall sensor will detect that the relative distance between the trigger element 400 is the longest.

[0125] When the feed line resistance increases or becomes excessive, the extrusion mechanism 110 moves the feed line downwards, shortening the feed line length between the feed tray or feeding device and the extrusion assembly 202. The feeding assembly 203 then moves downwards, compressing the elastic element 300. The magnetic element moves with the feeding assembly 203, and the Hall sensor detects the position of the magnetic element, obtaining its distance from the magnetic element, and thus calculating the feed line resistance. When the feed line resistance is different, the elastic element 300 is compressed to different lengths, corresponding to different positions of the trigger element 400, and different distances between the trigger element 400 and the Hall sensor. Therefore, the feed line resistance can be detected based on the position of the trigger element 400 relative to the detected magnetic element. When the resistance is too high, printing can be paused immediately to check the cause of the abnormality, the feed line can be cut and retracted, and the user can be notified that the feed line resistance is too high. Printing can resume after the resistance returns to normal.

[0126] In an optional implementation of this invention, the trigger element 400 includes a protrusion (not shown in the figure). Correspondingly, the detection element 500 includes at least one limit switch (not shown in the figure). When the relative distance between the extrusion assembly 202 and the feeding assembly 203 is a preset value, the protrusion touches and triggers the limit switch. In other words, the protrusion moves with the feeding assembly 203 and touches the limit switch during the movement of the feeding assembly 203 toward the extrusion assembly 202.

[0127] In practical applications, limit switches can be used as detection elements 500, and resistance detection is performed based on the detection method where the moving position corresponds to different resistance values. The trigger element 400 includes a protrusion, which is disposed on the side of the feeding assembly 203 facing the receiving cavity 120 or on the underside facing the extrusion mechanism 110, meaning it can contact the limit switch during the sliding process of the feeding assembly 203. There is at least one limit switch, which can be disposed inside the receiving cavity 120 and along the direction of the material line in the feeding channel 210 between the extrusion assembly 202 and the feeding assembly 203. Multiple limit switches can be evenly spaced or have varying spacing; this invention does not specifically limit this. When the feeding assembly 203 and the extrusion assembly 202 move relative to each other, when the protrusion contacts the limit switch corresponding to different resistance values ​​(different limit switch positions correspond to different resistances), the relative distance between the extrusion assembly 202 and the feeding assembly 203 reaches the corresponding preset value, meaning the material line resistance reaches the corresponding resistance value.

[0128] In an optional implementation of this invention, the displacement between the extrusion assembly 202 and the feeding assembly 203 can also be detected by a grating sensor.

[0129] In an optional implementation of this utility model, the triggering element 400 includes a metal element; correspondingly, the detection element 500 includes an eddy current coil for detecting the distance to the metal element.

[0130] Metal components can be disposed on protrusions on the outer side of the feeding assembly 203, the protrusions protruding into a groove in the outer wall of the extrusion assembly 202 for slidable connection to the groove. Eddy current coils can be disposed outside the groove. Metal components can also be embedded in the feeding channel 210.

[0131] In an optional implementation of this utility model, the detection element 500 includes a force sensor (not shown in the figure). Alternatively, the elastic element 300 may not be provided. The trigger element 400 is a protrusion. Correspondingly, the positional relationship between the extrusion assembly 202 and the feeding assembly 203 can be fixed. The two are in contact with each other through the protrusion and the force sensor. When the resistance increases or becomes too large, the extrusion assembly 202 generates pressure on the force sensor on the feeding assembly 203 through the protrusion to indicate the resistance of the feed line.

[0132] In an optional implementation of this invention, the detection element 500 includes a force sensor (not shown in the figure). Alternatively, the trigger element 400 may be omitted, and the elastic element 300 may rest against the force sensor. Resistance is detected by detecting the spring force.

[0133] The type of force sensor includes, but is not limited to, strain tube type, diaphragm type, and strain beam type; this utility model does not limit the type.

[0134] Reference Figure 9 The diagram shows a structural schematic of a 3D printer printhead according to the present invention; the 3D printer printhead includes the material resistance detection device 800 and the hot end 900 as described above. The extrusion mechanism of the feed line resistance detection device 800 is used to drive the feed line to be transmitted to the hot end 900.

[0135] The feeding assembly 203 of the feed line resistance detection device 800 is used to receive the feed line from the feeding device.

[0136] The hot end 900 is used to heat the material line in the hot end 900 to a molten state, and is also used to extrude the molten material line to print a three-dimensional model.

[0137] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0138] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0139] In the description of this utility model, "multiple" means two or more.

[0140] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0141] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0142] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0143] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A feed line conveying device for 3D printing equipment, characterized in that, include: Material line housing; A fixed pipe and a sliding block are provided. The fixed pipe is installed in the feed line housing. One end of the fixed pipe is connected to one end of the feed pipe, and the other end of the feed pipe is used to connect to the feeding assembly. The sliding block is slidably installed in the feed line housing. A buffer cavity communicating with the fixed pipe is formed inside the sliding block. The end of the sliding block away from the feed pipe is also connected to one end of the discharge pipe communicating with the buffer cavity. The other end of the discharge pipe is used to couple the extrusion assembly. A first elastic element and a second elastic element, wherein the elastic coefficient of the first elastic element is greater than the elastic coefficient of the second elastic element; Wherein, the first elastic element abuts against the fixed pipe and the side of the sliding block facing the feed pipe, and the second elastic element abuts against the material line housing and the side of the sliding block facing the discharge pipe; or, both the first elastic element and the second elastic element are disposed between the fixed pipe and the sliding block, and the second elastic element is sleeved outside the first elastic element.

2. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, Also includes: A first detection element and a first trigger element are provided. The first detection element is disposed in one of the feed line housing and the sliding block, and the first trigger element is disposed in the other of the sliding block and the feed line housing. The first detection element is used to detect the relative distance or change in relative distance with the first trigger element, so as to detect the relative distance or change in relative distance between the extrusion assembly and the feeding assembly.

3. The feed line conveying device for 3D printing equipment according to claim 1 or 2, characterized in that, The first elastic element is in a compressed state, and / or the second elastic element is in a compressed state.

4. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, When the second elastic element is sleeved outside the first elastic element, there is a sliding distance between the sliding block and the material line housing.

5. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, It also includes a second detection element and a second trigger element; The second detection element is fixed relative to the fixed pipe, and the second trigger element is movably installed in the fixed pipe along an axial direction perpendicular to the fixed pipe and extends at least partially into the fixed pipe; The material is transported within the fixed pipe along the axial direction of the fixed pipe.

6. The feed line conveying device for 3D printing equipment according to claim 5, characterized in that, The second detection element is used to detect the relative distance or changes in the relative distance with the second trigger element, in order to detect whether the material line has entered the fixed pipe.

7. The feed line conveyor for 3D printing equipment according to claim 5 or 6, characterized in that, It also includes an elastic reset member, one end of which is fixed relative to the fixed pipe, and the other end of which is connected to the second trigger member.

8. The feed line conveying device for 3D printing equipment according to claim 5, characterized in that, The second trigger has an inclined pushing part that extends into the fixed pipe. The inclined pushing part has an inclined pushing surface that is inclined along the feeding direction of the material line.

9. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, It also includes a press-type connector for connecting the sliding block and the discharge pipe. The press-type connector includes a press-to-unlock part. The material line housing has an exposed opening along the axial direction of the discharge pipe. The diameter of the exposed opening is larger than the diameter of the press-to-unlock part.

10. The feed line conveying device for 3D printing equipment according to claim 9, characterized in that, The sliding block is also provided with a pushing protrusion, which extends to the outside of the material line housing in a direction perpendicular to the axial direction of the discharge pipe.

11. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, The material line housing also forms a limiting flange, which consists of two sets and is spaced apart. The sliding block is installed between the two sets of limiting flanges and can slide along the limiting flange.

12. The feed line conveying device for 3D printing equipment according to claim 11, characterized in that, Each set of limiting flanges includes a first flange and a second flange, the first flange and the second flange are spaced apart along the sliding direction of the sliding block and form an intermediate gap; The sliding block is adapted to slide into the second flange from the end away from the first flange, and the sum of the extension length of the first flange and the length of the intermediate gap is less than the extension length of the sliding block.

13. The feed line conveying device for 3D printing equipment according to claim 1, characterized in that, The feed line housing is also provided with a first limiting part, and the sliding block presses against the first limiting part when it moves to the limit position in the direction close to the feed pipe.

14. The feed line conveying device for 3D printing equipment according to claim 13, characterized in that, The first limiting part is constructed as a triangular block and has a clearance slope, which is inclined along the feeding direction of the fixed pipe.

15. The feed line conveying device for 3D printing equipment according to claim 2, characterized in that, The first trigger has a first sensing end and a second sensing end, the first sensing end and the second sensing end are spaced apart along the sliding direction of the sliding block, and the first detection element is located between the first sensing end and the second sensing end; When the sliding block moves to its limit position in the direction of approaching the feed pipe, the first detection element generates a first entanglement signal, and when the sliding block moves to its limit position in the direction of approaching the discharge pipe, the first detection element generates a second entanglement signal.

16. A 3D printing device, characterized in that, The device includes a feeding assembly, an extrusion assembly, and a feed line conveying device for a 3D printing equipment according to any one of claims 1-15, wherein the feeding assembly is connected to the feed pipe, and the extrusion assembly is connected to the discharge pipe.

17. The 3D printing equipment according to claim 16, characterized in that, It also includes a control module, the feeding assembly is provided with a feeding drive, and the extrusion assembly is provided with a discharging drive; The control module is used to control the operation of the feeding drive and / or the discharging drive.

18. The 3D printing equipment according to claim 16, characterized in that, There are two feed line conveyors for the 3D printing equipment, and the two feed line conveyors for the 3D printing equipment are arranged side by side.

19. The 3D printing equipment according to claim 16, characterized in that, It also includes a chassis, with the feed line device for the 3D printing equipment located inside the chassis.

20. The 3D printing equipment according to claim 19, characterized in that, The chassis is equipped with an openable door, and the sliding block is equipped with a push protrusion protruding towards the door.

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