Filament feeder for 3D printers and 3D printers

Abstract

Filament resistance detection device for a 3D printer (200), comprising: an extrusion assembly (202) provided with an extrusion mechanism (110), wherein the extrusion mechanism (110) is configured to drive a filament to be fed to the hotend (900);a feed assembly (203) which is provided with a feed channel (210), wherein a feed inlet of the feed channel (210) is configured to receive a filament from a feed device (100), the filament is fed from the feed device (100) from a feed opening (700) of the feed device (100) into the feed inlet of the feed channel (210), a filament tube (600) is provided between the feed opening (700) of the feed device (100) and the feed inlet of the feed channel (210), such that the length of a part of the filament between the feed opening (700) of the feed device (100) and the feed inlet of the feed channel (210) corresponds to the length of the filament tube (600);an elastic element (300), wherein one end of the elastic element (300) is connected to the extrusion assembly (202) and the other end is connected to the feed assembly (203), the elastic element (300) being configured to prevent the extrusion assembly (202) from approaching the feed assembly (203) in the direction of the filament in the feed channel (210), thus shortening the relative distance between the feed assembly (203) and the extrusion assembly (202); a trigger element (400) being arranged at one end of the extrusion assembly (202) and the feed assembly (203); a detection element (500) being arranged at the other end of the extrusion assembly (202) and the feed assembly (203) and being configured to shorten the relative distance between the extrusion assembly (202) and the Feed assembly (203) or a change in the relative distance is detected by detecting a relative distance to the trigger element (400).

Description

Material line conveying device for 3D printing equipment and 3D printing equipment

[0001] CROSS-REFERENCE 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 three-dimensional printer print head, and a three-dimensional printer,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of printers, and in particular to a material line conveying device for a 3D printing device and a 3D printing device having the material line conveying device for the 3D printing device. Background Art

[0004] For 3D printers equipped with wire magazines, the movement path of the wire from the wire magazine to the print head is long and the movement resistance is large. In addition, during the operation of the 3D printer, due to various reasons, in addition to the asynchrony between the motors causing the movement resistance of the wire to increase, there may be other reasons such as material jamming in the wire magazine, wire entanglement, etc., which sometimes cause the movement resistance of the wire to increase. When the movement resistance of the wire increases to a certain extent, it will lead to insufficient wire extrusion, slippage of the extrusion wheel and other problems, affecting the final printing results or causing printing failure. There is room for improvement.

[0005] Summary of the Invention

[0006] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a material line conveying device for 3D printing equipment, which can buffer the movement of the material line during normal material line transportation to change the length of the material line's movement path, and can buffer the asynchrony of the extruders at both ends of the material line that causes the material line to be stressed, thereby improving production efficiency and product quality, and can buffer the movement of the sliding block to ensure the smoothness of the sliding block's movement. The overall structure is relatively simple and easy to operate and implement. In addition, the material line output device proposed in the present application also has the function of material winding buffering, that is, when the material line's resistance is too large, the length of the material line's movement path can also be changed to avoid the material line being torn apart when the resistance is too large. The present application adopts two elastic parts with different elastic coefficients, which can achieve the buffering of normal material line transportation and the buffering of material winding without interfering with each other.

[0007] According to an embodiment of the present application, a material line conveying device for a 3D printing device includes: a material line housing; a fixed pipe and a sliding block, the fixed pipe is installed on the material 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 the feeding assembly, the sliding block is slidably installed on the material line housing, a buffer cavity connected to the fixed pipe is formed in the sliding block, the end of the sliding block away from the feed pipe is also connected to one end of the discharge pipe connected to the buffer cavity, and the other end of the discharge pipe is used to couple the extrusion assembly; a first elastic member and a second elastic member, 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 material line housing and the side of the sliding block facing the discharge pipe, or, the first elastic member and the second elastic member are both arranged between the fixed pipe and the sliding block, and the second elastic member is sleeved outside the first elastic member.

[0008] According to the wire conveying device for 3D printing equipment of the embodiment of the present application, a second elastic member is provided to buffer the movement of the wire during normal feeding of the wire, and the deformation of the second elastic member can change the length of the wire's motion path. Because the wire's motion path is relatively long, it is generally necessary to set up multiple extrusion assemblies along the wire's motion path. Since the extrusion assembly is driven by a motor, if the synchronization control between the two motors is not done well, the forces between the feeding assembly and the extrusion assembly will be out of sync, which will cause the wire to be pulled. In this application, the use of a second elastic member can buffer the force on the wire, reduce the control difficulty, and improve production efficiency and product quality. In addition, the wire output device proposed in this application also has the function of a material winding buffer. The material winding buffer is different from the buffer during the normal feeding process. In addition to the asynchrony between the motors, it is used to buffer the wire's resistance due to excessive material resistance caused by factors other than material jamming in the wire box or wire entanglement. In this case, the deformation of the first elastic member can change the length of the wire's motion path to prevent the wire from being torn apart when it is subjected to excessive resistance. The first and second elastic members are provided to cushion the movement of the slider, and regardless of the placement of the first and second elastic members in the wire conveyor device for 3D printing equipment, the slider's movement is ensured to be smooth. The overall structure is relatively simple, easy to operate and implement. In other words, the wire conveyor device of the present application integrates both a wire conveying buffer and a wire winding buffer, resulting in a simple and compact structure.

[0009] According to some embodiments of the present application, the material line conveying device for 3D printing equipment further includes: a first detection member and a first trigger member, the first detection member is arranged in one of the material line housing and the sliding block, the first trigger member is arranged in the other of the sliding block and the material line housing, and the first detection member is used to detect the relative distance or the change in the relative distance with the first trigger member to detect the relative distance or the change in the relative distance between the extrusion assembly and the feeding assembly. The present application can detect the change in the relative distance between the extrusion assembly and the feeding assembly, thereby determining whether the material line resistance increases. Moreover, due to the presence of the first elastic member, the greater the change in the relative distance, the greater the resistance, so the magnitude of the resistance can be determined, thereby avoiding printing defects or failures. Furthermore, the reduction in the relative distance between the extrusion assembly and the feeding assembly caused by excessive resistance can buffer the impact caused by excessive resistance, providing time for timely response during high-speed printing.

[0010] According to some embodiments of the present application, in a material line conveying device for a 3D printing device, the first elastic member is in a compressed state, and / or the second elastic member is in a compressed state. In implementing the present application, when the material line conveying device is not operating, the two elastic members can define the initial position of the sliding block. The material line conveying device being non-operating can be understood as the feed assembly not conveying the material line and the extrusion assembly not extruding the material line.

[0011] In some embodiments of the present application, in a feedline conveying device for 3D printing equipment, when the second elastic member is disposed outside the first elastic member, a sliding distance exists between the sliding block and the feedline housing. In this case, during normal feedline conveyance, if the extrusion speed of the extrusion assembly is slower than the speed of the feeder assembly, and the feedline's travel path needs to be lengthened, the second elastic member may be in a stretched state.

[0012] According to some embodiments of the present application, the material line conveying device for 3D printing equipment also includes a second detection member and a second trigger member, and a fixed pipe is formed in the fixed pipe at one end connected to the feed pipe; the second detection member is relatively fixed to the fixed pipe, and the second trigger member is movably installed in the fixed pipe along an axial direction perpendicular to the fixed pipe and at least partially extends into the fixed pipe; wherein, the material line is transmitted in the fixed pipe along the axial direction of the fixed pipe.

[0013] According to some embodiments of the material line conveying device for 3D printing equipment of the present application, the second detection member is used to detect the relative distance or the change in the relative distance with the second trigger member to detect whether the material line enters the fixed pipe.

[0014] According to some embodiments of the present application, the material line conveying device for 3D printing equipment further includes an elastic return member, one end of which is fixed relative to the fixed pipe, and the other end of the elastic return member is connected to the second trigger member.

[0015] According to some embodiments of the material line conveying device for 3D printing equipment of the present application, the second triggering member is formed with an inclined pushing portion, the inclined pushing portion extends into the fixed pipe, the inclined pushing portion is formed with an inclined pushing surface, and the inclined pushing surface is arranged obliquely along the feeding direction of the material line.

[0016] According to some embodiments of the present application, the material line conveying device for 3D printing equipment also includes a push-type joint, which is used to connect the sliding block and the discharge pipe. The push-type joint includes a push-to-unlock part, and the material line housing is provided with 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 push-to-unlock part.

[0017] According to some embodiments of the material line conveying device for 3D printing equipment of the present application, the sliding block is further provided with a pushing protrusion, and the pushing protrusion extends to the outside of the material line housing along an axial direction perpendicular to the discharge pipe.

[0018] According to some embodiments of the present application, the material line conveying device for 3D printing equipment is further formed with a limiting flange, the limiting flanges are divided into two groups and are spaced apart, and the sliding block is limitedly installed between the two groups of limiting flanges and can slide along the limiting flanges.

[0019] According to some embodiments of the present application, in a material line conveying device for a 3D printing device, each group of the limiting flanges includes a first flange and a second flange, and the first flange and the second flange are spaced apart and distributed along the sliding direction of the sliding block and form an intermediate gap; wherein, the sliding block is suitable for sliding in from an end of the second flange 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.

[0020] According to some embodiments of the material line conveying device for 3D printing equipment of the present application, the material line housing is further provided with a first limiting portion, and the sliding block is pressed against the first limiting portion when it moves toward the extreme position close to the feeding tube.

[0021] According to some embodiments of the material line conveying device for 3D printing equipment of the present application, the first limiting portion is configured as a triangular block and is formed with an avoidance slope, and the avoidance slope is configured to be inclined along the feeding direction of the fixed pipe.

[0022] According to some embodiments of the present application, in a material line conveying device for a 3D printing device, the first trigger member has a first sensing end and a second sensing end, the first sensing end and the second sensing end are spaced apart and distributed along the sliding direction of the sliding block, and the first detection member is located between the first sensing end and the second sensing end; wherein, when the sliding block moves toward the direction close to the feed pipe to the extreme position, the first detection member generates a first material entanglement signal, and when the sliding block moves toward the direction close to the discharge pipe to the extreme position, the first detection member generates a second material entanglement signal.

[0023] This application also proposes a 3D printing device.

[0024] According to an embodiment of the present application, the 3D printing device includes a feeding assembly, an extrusion assembly, and a material line conveying device for the 3D printing device as described above, wherein the feeding assembly is connected to the feed pipe, and the extrusion assembly is connected to the discharge pipe.

[0025] According to some embodiments of the present application, the 3D printing device further includes a control module, the feeding assembly is provided with a feed drive, and the extrusion assembly is provided with a discharge drive; wherein the control module is used to control the action of the feed drive and / or the discharge drive.

[0026] According to the 3D printing device of some embodiments of the present application, there are two material line conveying devices for the 3D printing device, and the two material line conveying devices for the 3D printing device are arranged side by side.

[0027] According to some embodiments of the present application, the 3D printing device further includes a chassis, wherein the material line conveying device for the 3D printing device is located inside the chassis. Optionally, the chassis is provided with a first stopper corresponding to the second flange of the material line conveying device for the 3D printing device. The first stopper is positioned closer to the second flange than the position where the slider slides in, thereby preventing the slider from moving toward the feed tube and sliding out of the material line housing when the material is wound.

[0028] According to the 3D printing device of some embodiments of the present application, the chassis is provided with an openable and closable door, and the sliding block is provided with a pushing protrusion, and the pushing protrusion is provided to protrude toward the direction of the door.

[0029] The advantages of the 3D printing device and the above-mentioned material line conveying device for the 3D printing device over the prior art are the same and will not be described in detail here.

[0030] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] FIG1 is a partial cross-sectional view of a 3D printing device according to an embodiment of the present application;

[0033] FIG2 is a second partial cross-sectional view of a 3D printing device according to an embodiment of the present application;

[0034] FIG3 is a third partial cross-sectional view of a 3D printing device according to an embodiment of the present application;

[0035] FIG4 is a partial cross-sectional view of a 3D printing device according to an embodiment of the present application;

[0036] FIG5 is a cross-sectional schematic diagram of two material line input devices according to an embodiment of the present application;

[0037] FIG6 is a schematic structural diagram of two material line input devices according to an embodiment of the present application;

[0038] FIG7 is a fifth partial cross-sectional view of a 3D printing device according to an embodiment of the present application;

[0039] FIG8 is a schematic structural diagram of a material line resistance detection device of the present application;

[0040] FIG9 is a schematic structural diagram of a print head of a 3D printer of the present application.

[0041] Reference numerals:

[0042] Material line conveying device 100 for 3D printing equipment, 3D printing equipment 200,

[0043] Feed line housing 1, exposed opening 101, limiting flange 102, first flange 1021, second flange 1022, intermediate gap 1023, first limiting portion 103, avoidance slope 1031, fixed pipe 2, sliding block 3, buffer chamber 31, pushing lug 32, feeding pipe 4, first elastic member 6, second elastic member 7, first detection member 8, first trigger member 9, first sensing end 91, second sensing end 92, second detection member 10, second trigger member 11, inclined pushing portion 111, inclined pushing surface 112, elastic reset member 13, press-type connector 14, press-unlocking portion 141, trachea connector 15,

[0044] Chassis 201, extrusion assembly 202, extrusion mechanism 110, accommodating chamber 120, feeding assembly 203, feeding channel 210, elastic element 300, trigger element 400, detection element 500, material line tube 600, feeding port 700 of feeding device, material line resistance detection device 800, hot end 900. DETAILED DESCRIPTION

[0045] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0046] The following describes, with reference to Figures 1 to 7, a material line conveying device 100 for a 3D printing device according to an embodiment of the present application. The material line can be buffered to change the length of the material line's movement path, reduce the material line's movement resistance, and improve production efficiency and product quality. By providing a first elastic member 6 and a second elastic member 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.

[0047] As shown in Figures 1 to 4, a material line conveying device 100 for a 3D printing device according to an embodiment of the present application includes: a material line housing 1, a fixed pipe 2, a sliding block 3, a first elastic member 6 and a second elastic member 7.

[0048] The fixed pipe 2 is installed on the material 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 the feeding assembly 203. The sliding block 3 is slidably installed on the material line housing 1, and a buffer cavity 31 connected to the fixed pipe 2 is formed in 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 connected to the buffer cavity 31, and the other end of the discharge pipe is used to couple the extrusion assembly 202; a first elastic member 6 and a second elastic member 7, the elastic coefficient of the first elastic member 6 is greater than the elastic coefficient of the second elastic member 7; wherein the first elastic member 6 abuts between the fixed pipe 2 and the side of the sliding block 3 facing the feed pipe 4, and the second elastic member 7 abuts between the material line housing 1 and the side of the sliding block 3 facing the discharge pipe, or, the first elastic member 6 and the second elastic member 7 are both arranged between the fixed pipe 2 and the sliding block 3, and the second elastic member 7 is sleeved outside the first elastic member 6 (not shown in the figure).

[0049] Specifically, the material line housing 1 is used to provide an installation location for the components within the material line conveying device 100 for 3D printing equipment and to protect them. By installing the fixed pipe 2 in the material line housing 1, the fixed pipe 2 can be installed, and the fixed pipe 2 can allow the material line to pass through, that is, the fixed pipe 2 can be used to convey the material line. One end of the fixed pipe 2 is connected to the feed pipe 4, and the other end of the feed pipe 4 can be connected to the feeding assembly 203 through the air pipe joint 15. The feeding assembly 203 can be connected to the fixed pipe 2 through the air inlet pipe, so that the material line in the feeding assembly 203 can enter the fixed pipe 2 from the feed pipe 4 and be transported to other locations through the fixed pipe 2. At this time, the path length between the feeding assembly 203 and the fixed pipe 2 is fixed.

[0050] At the same time, a sliding block 3 is also provided in the material line housing 1. The sliding block 3 can slide relative to the material line housing 1, and a buffer chamber 31 is formed in the sliding block 3 that is connected to the fixed pipe 2. The other end of the fixed pipe 2 can be connected to the buffer chamber 31, so that the material line in the feeding assembly 203 can further enter the buffer chamber 31. Moreover, at the end of the sliding block 3 away from the feeding pipe 4, the buffer chamber 31 can also be connected to one end of the discharge pipe, that is, the buffer chamber 31 can be connected to the fixed pipe 2 and the discharge pipe at the same time, so that the material line entering the buffer chamber 31 from the fixed pipe 2 can enter the discharge pipe, and the other end of the discharge pipe is used to couple with the extrusion assembly 202, that is, the other end of the discharge pipe can be connected to the extrusion assembly 202, that is, the buffer chamber 31 can be connected to the extrusion assembly 202 through the discharge pipe, so that the material line in the buffer chamber 31 can be transported from the discharge pipe to the extrusion assembly 202 to meet the user's usage requirements. 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.

[0051] Furthermore, the feeding component 203, the feed pipe 4, the fixed pipe 2, the buffer chamber 31, the discharge pipe and the extrusion component 202 can be connected in sequence. The feeding component 203 can provide a material line, so that the material line can be transported to the extrusion component 202 through the feed pipe 4, the fixed pipe 2, the buffer chamber 31 and the discharge pipe in sequence to meet the user's usage needs, and the material line can be first transported to the buffer chamber 31 of the sliding block in the process of being transported from the feeding component 203 to the extrusion component 202. The sliding block slides in the material line housing to change the length of the movement path of the material line. The transportation path of the material line includes the feeding component 203 connecting the feed pipe to the fixed pipe, the fixed pipe to the sliding block, and the sliding block connecting the discharge pipe to the extrusion component 202. Since the lengths of the feed pipe and the discharge pipe are fixed, the sliding block slides in the material line housing to change the distance between the fixed pipe and the sliding block, thereby changing the length of the transportation path of the material line.

[0052] Furthermore, the feed line conveying device 100 for a 3D printing device is provided with a first elastic member 6 and a second elastic member 7. The elastic coefficient of the first elastic member 6 is configured to be greater than that of the second elastic member 7. This allows the first elastic member 6 to withstand greater forces, and both the first elastic member 6 and the second elastic member 7 to be configured as springs. Different spring coefficients mean that the same force produces different deformations. Therefore, the different spring coefficients of the two elastic members can distinguish normal feeding from winding. For example, during normal feeding, when the feed assembly 203 feeds the feed line to the extruder assembly 202, the feed line's path needs to be lengthened, and the slider compresses the second elastic member 7. When the feed assembly 203 is not feeding new feed line, and the extruder assembly 202 is continuing to extrude, the feed line's path needs to be shortened. At this point, the second elastic member 7 can recover its deformation due to its own elasticity. During normal feeding, new feed line can continue when the slider returns to near its initial position. In this case, the first elastic member 6 does not function during normal feeding. If material entanglement occurs and the resistance of the material line continues to increase, the sliding block will compress the first elastic member 6. The resistance of the material entanglement is relatively large, so the first elastic member 6 with a larger spring coefficient is selected as a component for material entanglement buffering.

[0053] Among them, the first elastic member 6 can be abutted between the fixed pipe 2 and the side of the sliding block 3 facing the feed pipe 4, that is, the first elastic member 6 can be set between the fixed pipe 2 and the sliding block 3, and the second elastic member 7 can be abutted between the material line housing 1 and the side of the sliding block 3 facing the discharge pipe, that is, the second elastic member 7 can be set between the sliding block 3 and the discharge pipe, that is, the first elastic member 6 and the second elastic member 7 can be respectively set at the two ends of the sliding block 3. When feeding is not performed, the sliding block 3 is in a free state, and the first elastic member 6 and the second elastic member 7 are relatively balanced at the two ends of the sliding block 3. When feeding normally, the material The wire will enter the buffer chamber 31 and push the sliding block 3 to slide in the direction close to the discharge pipe. At this time, the second elastic member 7 can be compressed to buffer the movement of the sliding block 3, so that the sliding block 3 can slide smoothly. When the movement resistance of the material line is too large, the material line entering the buffer chamber 31 will become less, or even no material line will enter the buffer chamber 31, that is, the thrust of the material line on the sliding block 3 will be reduced or even disappear. The second elastic member 7 can push the sliding block 3 to slide in the direction close to the feed pipe 4 under the action of its own restoring force. At this time, the first elastic member 6 can be compressed to buffer the movement of the sliding block 3, so that the sliding block 3 can slide smoothly.

[0054] Alternatively, the first elastic member 6 and the second elastic member 7 can also be arranged between the fixed pipe 2 and the sliding block 3, and the second elastic member 7 can be sleeved outside the first elastic member 6 to ensure that the first elastic member 6 and the second elastic member 7 can both work normally. For example, the first elastic member 6 can be fixedly connected to the fixed pipe 2, and the second elastic member 7 can be fixedly connected to the fixed pipe 2 and the sliding block 3 at the same time. When feeding is not in progress, the first elastic member 6 and the second elastic member 7 are both in a balanced state. When feeding normally, the material line will push the sliding block 3 to move toward the direction close to the discharge pipe. At this time, the second elastic member 7 can be stretched to buffer the movement of the sliding block 3. When the movement resistance of the material line is too large, the sliding block 3 can move toward the direction close to the feed pipe 4 under the action of the second elastic member 7. At this time, the first elastic member 6 can be compressed to buffer the movement of the sliding block 3.

[0055] Among them, it should be noted that the elastic coefficient of the first elastic member 6 is constructed to be greater than the elastic coefficient of the second elastic member 7, so that the first elastic member 6 can withstand the elastic force from the second elastic member 7. That is, whether the first elastic member 6 and the second elastic member 7 are respectively arranged at the two ends of the sliding block 3, or the first elastic member 6 and the second elastic member 7 are both arranged between the fixed pipe 2 and the sliding block 3, it can be ensured that the first elastic member 6 can withstand the elastic force of the second elastic member 7, thereby ensuring the reliability of buffering the movement of the sliding block 3 by the first elastic member 6 and the second elastic member 7.

[0056] According to the material line conveying device 100 for 3D printing equipment in the embodiment of the present application, the movement of the material line can be buffered by providing a buffer chamber 31, so as to change the length of the movement path of the material line, reduce the movement resistance of the material line, and improve production efficiency and product quality. The movement of the sliding block 3 can be buffered by providing the first elastic member 6 and the second elastic member 7, and regardless of the setting position of the first elastic member 6 and the second elastic member 7 in the material line conveying device 100 for 3D printing equipment, the smooth movement of the sliding block 3 can be ensured. The overall structure is relatively simple and easy to operate and implement.

[0057] In some embodiments, the material line conveying device 100 for a 3D printing device further includes: a first detection member 8 and a first trigger member 9, the first detection member 8 being arranged in one of the material line housing 1 and the sliding block 3, and the first trigger member 9 being arranged in the other of the sliding block 3 and the material line housing 1, the first detection member 8 being used to detect the relative distance or the change in the relative distance with the first trigger member 9 to detect the relative distance or the change in the relative distance between the extrusion component 202 and the feeding component 203.

[0058] Specifically, a first detection member 8 and a first trigger member 9 are provided in the material line conveying device 100 for 3D printing equipment. The first detection member 8 can detect the relative distance between the first detection member 8 and the first trigger member 9, that is, the first detection member 8 can be used to detect the relative distance or the change in the relative distance between the first detection member 8 and the first trigger member 9. The first detection member 8 can be set on the material line housing 1, and the first trigger member 9 can be set on the sliding block 3, or the first detection member 8 can be set on the sliding block 3, and the first trigger member 9 can be set on the material line housing 1, both of which can realize the setting of the first detection member 8 and the first trigger member 9, and the sliding block 3 will drive the first detection member 8 or the first trigger member 9 connected to it to move during the sliding process, so that the relative distance between the first detection member 8 and the first trigger member 9 changes, even if the first detection member 8 can obtain different detection results.

[0059] For example, as shown in Figures 1 and 2, the first detection member 8 can be set on the material line housing 1, and the first trigger member 9 can be set on the sliding block 3, that is, the first detection member 8 can be fixedly connected to the material line housing 1, and the first trigger member 9 can be fixedly connected to the sliding block 3 to ensure the reliability of the operation of the first detection member 8 and the first trigger member 9. When the sliding block 3 moves relative to the material line housing 1, the relative distance between the first detection member 8 and the first trigger member 9 will change, causing the detection result of the first detection member 8 to change, that is, the first detection member 8 can detect the relative distance between it and the first trigger member 9 or the change in the relative distance.

[0060] Furthermore, when the sliding block 3 moves relative to the material line housing 1, the sliding block 3 will approach the feed pipe 4 or the discharge pipe. When the sliding block 3 moves in the direction close to the discharge pipe, the distance between the sliding block 3 and the feeding component 203 will increase, that is, the distance between the feeding component 203 and the extrusion component 202 will increase. When the sliding block 3 moves in the direction close to the feed pipe 4, the distance between the sliding block 3 and the feeding pipe 4 will decrease, that is, the distance between the feeding component 203 and the extrusion component 202 will decrease. That is to say, in the process of sliding of the sliding block 3, the relative distance between the first trigger member 9 connected to the sliding block 3 and the first detection member 8 will change. At the same time, the distance between the feeding component 203 and the extrusion component 202 will also change. Therefore, the relative distance or the change in relative distance between the extrusion component 202 and the feeding component 203 can be indirectly detected by the first detection member 8, and the movement resistance of the material line can be judged.

[0061] 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.

[0062] Specifically, as shown in Figures 1 to 3, when the first elastic member 6 and the second elastic member 7 are respectively arranged at the two ends of the sliding block 3, during the normal feeding process, the sliding block 3 can move toward the direction close to the discharge pipe under the thrust of the material line. At this time, the sliding block 3 can compress the second elastic member 7, so that the second elastic member 7 is in a compressed state. When the movement resistance of the material line is too large, the sliding block 3 can move toward the direction close to the feed pipe 4 under the action of the second elastic member 7. At this time, the sliding block 3 can compress the first elastic member 6, so that the first elastic member 6 is in a compressed state.

[0063] Alternatively, when the first elastic member 6 and the second elastic member 7 are both arranged between the sliding block 3 and the fixed pipe 2, during the normal feeding process, the sliding block 3 can move toward the direction close to the discharge pipe under the thrust of the material line. At this time, the sliding block 3 can stretch the second elastic member 7. When the movement resistance of the material line is too large, the sliding block 3 can move toward the direction close to the feed pipe 4 under the action of the second elastic member 7. At this time, the sliding block 3 can simultaneously compress the first elastic member 6 and the second elastic member 7.

[0064] 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 material line housing 1 .

[0065] Specifically, when the second elastic member 7 is sleeved outside the first elastic member 6, the first elastic member 6 and the second elastic member 7 can be both arranged 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 shell 1 facing the discharge pipe, that is, there is a sliding distance between the sliding block 3 and the material line shell 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 toward the discharge pipe under the thrust of the material line.

[0066] In some embodiments, the material line conveying device 100 for 3D printing equipment also includes a second detection member 10 and a second trigger member 11, and a fixed pipe 12 is formed in the fixed pipe 2 at one end connected to the feed pipe 4; the second detection member 10 is relatively fixed to the fixed pipe 2, and the second trigger member 11 is movably installed in the fixed pipe 2 along the axial direction perpendicular to the fixed pipe 2 and at least partially extends into the fixed pipe 2; wherein, the material line is transmitted in the fixed pipe 2 along the axial direction of the fixed pipe 2.

[0067] Specifically, by fixing the second detection member 10 relative to the fixed pipe 2, the second detection member 10 can be fixedly connected to the fixed pipe 2, and the second trigger member 11 can be movably installed on the fixed pipe 2 along the axial direction perpendicular to the fixed pipe 2, so that the second trigger member 11 can be movably connected to the side wall of the fixed pipe 2, and the second trigger member 11 can be moved along the axial direction perpendicular to the fixed pipe 2, and the second trigger member 11 can be partially extended into the fixed pipe 2, or the second trigger member 11 can be fully extended into the fixed pipe 2, so as to achieve a reliable connection between the second trigger member 11 and the fixed pipe 2.

[0068] In addition, the material line can be transmitted in the fixed pipe 2 along the axial direction of the fixed pipe 2, that is, the movement direction of the material line is along the axial direction of the fixed pipe 2, and the fixed pipe 12 is formed in one end of the fixed pipe 2 connected to the feed pipe 4, that is, the fixed pipe 12 can be set in the fixed pipe 2 at one end close to the feed pipe 4, and at least a part of the second trigger member 11 can be extended into the fixed pipe 2, even if at least a part of the second trigger member 11 can block the movement of the material line in the fixed pipe 2, that is, the material line entering the fixed pipe 2 from the feed pipe 4 can generate thrust on the second trigger member 11 and push the second trigger member 11 to move.

[0069] In some embodiments, the second detecting member 10 is used to detect the relative distance or the change in the relative distance with the second triggering member 11 to detect whether the material line enters the fixed pipe 2 .

[0070] Specifically, the second detection member 10 can detect the relative distance between itself and the second trigger member 11, that is, the second detection member 10 can be used to detect the relative distance or change in the relative distance between itself and the second trigger member 11. The second detection member 10 and the second trigger member 11 can be spaced apart and arranged along the axial direction perpendicular to the fixed pipe 2, and the second detection member 10 can be fixedly connected to the fixed pipe 2, and at least part of the second trigger member 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 member 11, so that the second trigger member 11 moves in the direction close to the second detection member 10, thereby changing the relative distance between the second detection member 10 and the second trigger member 11, so that the second detection member 10 can obtain different detection results. Therefore, it can be judged whether the material line has entered the fixed pipe 2 based on the detection result of the second detection member 10, that is, whether the material line has entered the fixed pipe 2 can be detected by the second detection member 10.

[0071] In some embodiments, the material line conveying device 100 for 3D printing equipment further includes an elastic return member 13 , one end of the elastic return member 13 is fixedly arranged relative to the fixed pipe 2 , and the other end of the elastic return member 13 is connected to the second trigger member 11 .

[0072] Specifically, the material line in the fixed pipe 2 can push the second trigger member 11 to move toward the direction close to the second detection member 10. As shown in Figures 1-2 and 7, an elastic reset member 13 is also provided in the material line conveying device 100 for 3D printing equipment. The elastic reset member 13 is arranged along the 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 and the fixed pipe 2 can be fixed, and 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 and the second trigger member 11 can be fixedly connected, thereby realizing the setting of the elastic reset member 13 and ensuring the reliability of the operation of the elastic reset member 13.

[0073] For example, as shown in Figures 1-2 and 7, the elastic return member 13 can be arranged 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 return member 13 can be compressed. At this time, the elastic return 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 to move into the fixed pipe 2 when the movement resistance of the material line is too large. The elastic return member 13 can be constructed as a spring.

[0074] In some embodiments, the second trigger member 11 is formed with an inclined pushing portion 111, which extends into the fixed pipe 12. The inclined pushing portion 111 is formed with an inclined pushing surface 112, which is inclined along the feeding direction of the material line.

[0075] Specifically, the second trigger member 11 can move toward the direction approaching the second detection member 10 under the thrust of the material line, and an inclined pushing portion 111 is formed on the second trigger member 11. The inclined pushing portion 111 is extended into the fixed pipe 12, and the fixed pipe 12 is set in the fixed pipe 2, so that the material line entering the fixed pipe 2 can push the inclined pushing portion 111 to move the second trigger member 11 toward the direction approaching the second detection member 10. At the same time, an inclined pushing surface 112 is formed on the inclined pushing portion 111, and the inclined pushing surface 112 can increase the contact area between the material line and the inclined pushing portion 111, thereby improving the reliability of the material line pushing the inclined pushing portion 111 to move, and the inclined pushing surface 112 is inclined along the feeding direction of the material line, so that the material line can push the inclined pushing portion 111 to move through the inclined pushing surface 112 during the feeding process, thereby ensuring the reliability of the second trigger member 11 moving toward the second detection member 10 under the thrust of the material line. The inclined pushing surface 112 can push the inclined pushing portion 111 away with a relatively small thrust, thereby preventing the triggering member from blocking the conveyance of the material line.

[0076] In some embodiments, the material line conveying device 100 for 3D printing equipment also includes a press-type joint 14, which is used to connect the sliding block 3 and the discharge pipe. The press-type joint 14 includes a press-unlocking part 141, and the material line housing 1 is provided with an exposed opening 101 along the axial direction of the discharge pipe. The diameter of the exposed opening 101 is larger than the diameter of the press-unlocking part 141.

[0077] Specifically, the push-type joint 14 is used to connect the sliding block 3 and the discharge pipe, that is, the buffer chamber 31 is connected to the discharge pipe through the push-type joint 14, thereby ensuring the reliability of the material line entering the discharge pipe from the buffer chamber 31, and the push-type joint 14 is connected to the sliding block 3, even if the push-type joint 14 can move under the drive of the sliding block 3, at the same time, a push-type unlocking part 141 is provided on the push-type joint 14, and the push-type unlocking part 141 is used to unlock the material line from the discharge pipe when pressed, so that the discharge pipe can be removed for maintenance, and the push-type unlocking part 141 can extend to the outside of the material line housing 1, which is convenient for the user to operate the push-type unlocking part 141.

[0078] In addition, an exposed port 101 is provided on the material line housing 1, and the exposed port 101 connects the inner side and the outer side of the material line housing 1, and allows at least part of the push-type connector 14 to pass through, and the exposed port 101 is provided on the material line housing 1 along the axial direction of the discharge pipe, that is, the exposed port 101 can be provided on the movement path of the push-type connector 14, so that at least part of the push-type connector 14 can extend from the exposed port 101, and the press-unlocking portion 141 is the largest diameter part on the push-type connector 14, and the diameter of the exposed port 101 is constructed to be larger than the diameter of the press-unlocking portion 141, so that at least part of the push-type connector 14 can extend from the exposed port 101.

[0079] Among them, it should be noted that the push-type joint 14 is used to connect the sliding block 3 and the discharge pipe. When the discharge pipe needs to be inspected, at least part of the push-type joint 14 including the push-unlocking part 141 can be extended out of the outside of the material line shell 1, and then the push-unlocking part 141 is pressed to unlock the discharge pipe and the push-type joint 14. Then, the discharge pipe can be easily pulled out from the push-type joint 14 to inspect the discharge pipe, which can reduce the subsequent maintenance cost.

[0080] In some embodiments, the sliding block 3 is further provided with a pushing lug 32 , and the pushing lug 32 extends to the outside of the material line housing 1 along an axial direction perpendicular to the discharge pipe.

[0081] The push lug 32 is provided on the sliding block 3 so that the user can operate the sliding block 3 by pushing the lug 32. Furthermore, when the user applies a force to the push lug 32, the force applied by the user can be transmitted from the push lug 32 to the pressing joint 14 through the sliding block 3, so that the push lug 32 can drive the sliding block 3 and the pressing joint 14 to move together in the direction close to the discharge pipe, and at least a portion of the pressing unlocking portion 141 on the pressing joint 14 can be extended to the outside of the material line housing 1, so that the user can separate the discharge pipe from the pressing joint 14 and inspect / replace the discharge pipe. That is, the user pinches the protruding handle 32 and presses the unlocking portion 141 to pull out the discharge tube.

[0082] In addition, it should be noted that when the discharge pipe needs to be inspected, the pushing handle 32 can be pushed to make at least part of the push-unlocking part 141 on the push-type connector 14 extend out of the material line housing 1, and then the push-unlocking part 141 can be pressed by kneading the pushing handle 32 and the push-unlocking part 141 to unlock the discharge pipe and the push-type connector 14. The discharge pipe can then be easily pulled off the push-type connector 14, and the discharge pipe can be disassembled for inspection, which can reduce the subsequent maintenance costs.

[0083] In some embodiments, the material line housing 1 further forms a limiting flange 102 , which is divided into two groups and spaced apart. The sliding block 3 is limitedly installed between the two groups of limiting flanges 102 and can slide along the limiting flange 102 .

[0084] Specifically, the limiting flange 102 can be used to limit the sliding block 3. The limiting flange 102 is formed on the material line housing 1, so that the limiting flange 102 and the material line housing 1 can be relatively fixed to improve the reliability of the limiting flange 102 in limiting the sliding block 3. The limiting flange 102 is set as two groups, and the sliding block 3 can be limited by the two groups of limiting flanges 102 to further improve the reliability of the limiting flange 102 in limiting the sliding block 3. At the same time, the two groups of limiting flanges 102 are distributed at intervals, so that there is a certain distance between the two sets of limiting flanges 102, so that the sliding block 3 can be limited and installed between the two sets of limiting flanges 102, and then the sliding block 3 can be limited from both sides of the sliding block 3 at the same time by the two sets of limiting flanges 102, and the sliding block 3 can slide along the limiting flanges 102 between the two sets of limiting flanges 102, and the movement of the sliding block 3 can be guided by the two sets of limiting flanges 102 to improve the accuracy of the movement direction of the sliding block 3.

[0085] In some embodiments, each group of limiting flanges 102 includes a first flange 1021 and a second flange 1022, and the first flange 1021 and the second flange 1022 are spaced apart and distributed along the sliding direction of the sliding block 3 and form an intermediate gap 1023; wherein, the sliding block 3 is suitable for sliding in from an end of the second flange 1022 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.

[0086] Specifically, the first flange 1021 and the second flange 1022 are spaced apart and distributed along the sliding direction of the sliding block 3, so that the sliding block 3 can slide along the first flange 1021 and the second flange 1022 toward the end of the discharge pipe and away from the discharge pipe respectively, and then the two first flanges 1021 and the two second flanges 1022 can respectively guide the sliding block 3 toward the end of the discharge pipe and away from the discharge pipe, effectively improving the reliability of the two sets of limiting flanges 102 in guiding the movement of the sliding block 3, and forming an intermediate gap 1023 between the first flange 1021 and the second flange 1022, which can prevent the end of the sliding block 3 away from the discharge pipe from sliding between the two first flanges 1021, thereby ensuring that the two first flanges 1021 and the two second flanges 1022 can respectively guide the sliding block 3 toward the end of the discharge pipe and away from the discharge pipe.

[0087] In addition, the sliding block 3 can be slid into the end of the second flange 1022 away from the first flange 1021, and the sliding block 3 can be slid into the end toward the discharge pipe from the end of the second flange 1022 away from the first flange 1021, and then the sliding block 3 can be set between the two sets of limiting flanges 102, and the sum of the extension length of the first flange 1021 and the length of the middle gap 1023 is less than the extension length of the sliding block 3, so that when the sliding block 3 slides to the extreme position in the direction close to the discharge pipe, the end of the sliding block 3 away from the discharge pipe will not fall out of the second flange 1022, which can ensure the smooth movement of the sliding block 3 and prevent the sliding block 3 from falling out of the limiting flange 102.

[0088] In some embodiments, the feed line housing 1 is further provided with a first limiting portion 103 , and the sliding block 3 is pressed against the first limiting portion 103 when it moves toward the limit position close to the feed pipe 4 .

[0089] Specifically, the first limiting portion 103 is used to limit the sliding block 3 when the sliding block 3 moves to the extreme position. The first limiting portion 103 is set in the material line housing 1, and the first limiting portion 103 and the material line housing 1 can be relatively fixed to ensure the reliability of the first limiting portion 103 in limiting the sliding block 3, and the sliding block 3 is pressed against the first limiting portion 103 when it moves to the extreme position in the direction close to the feeding pipe 4, that is, when the sliding block 3 moves to the extreme position in the direction close to the feeding pipe 4, the first limiting portion 103 can limit the sliding block 3, which can avoid the sliding block 3 from falling out of the limiting flange 102 due to the long movement path of the sliding block 3.

[0090] In some embodiments, the first limiting portion 103 is configured as a triangular block and is formed with an avoidance slope 1031 , and the avoidance slope 1031 is configured to be inclined along the feeding direction of the fixed pipe.

[0091] Specifically, the first limiting portion 103 is used to limit the sliding block 3 when the sliding block 3 moves to the extreme position toward the direction close to the feed pipe 4. As shown in Figures 3-4, the first limiting portion 103 can be constructed as a triangular block, and an avoidance slope 1031 is formed on the first limiting portion 103. The avoidance slope 1031 is tilted along the feeding direction of the fixed pipe 2, so that the avoidance slope 1031 is set on the side of the triangular block close to the feed pipe 4, so that the avoidance slope 1031 can be used to avoid the fixed pipe 2 and the second detection part 10 and other components, ensuring the reliable operation of the second detection part 10 and other components. At the same time, the side of the first limiting portion 103 facing the sliding block 3 can be flat, so as to ensure the reliability of the first limiting portion 103 in limiting the sliding block 3.

[0092] It should be noted that the shape of the first limiting portion 103 is not limited to that described in this embodiment. In actual design, it can be flexibly set under the premise of limiting the sliding block 3 and avoiding the components in the material line housing 1.

[0093] In some embodiments, the first trigger member 9 has a first sensing end 91 and a second sensing end 92, and the first sensing end 91 and the second sensing end 92 are spaced apart and distributed along the sliding direction of the sliding block 3, and the first detection member 8 is located between the first sensing end 91 and the second sensing end 92; wherein, when the sliding block 3 moves toward the direction close to the feed pipe 4 to the extreme position, the first detection member 8 generates a first material entanglement signal, and when the sliding block 3 moves toward the direction close to the discharge pipe to the extreme position, the first detection member 8 generates a second material entanglement signal.

[0094] Specifically, the first trigger member 9 can cooperate with the first detection member 8 to detect the current position of the sliding block 3. The first trigger member 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 member 9 and the first detection member 8 are spaced apart along the sliding direction perpendicular to the sliding direction of the sliding block 3. The first sensing end 91 and the second sensing end 92 can be set toward the first detection member 8 so that the first detection member 8 can detect the distance from the first sensing end 91 and the second sensing end 92. Moreover, the first detection member 8 is set between the first sensing end 91 and the second sensing end 92, so that the distance between the first detection member 8 and the first sensing end 91 and the second sensing end 92 can be made closer, so that the first detection member 8 can simultaneously detect the distance from the first sensing end 91 and the second sensing end 92.

[0095] At the same time, the end close to the feed pipe 4 can be set as the first sensing end 91, and the end close to the discharge pipe can be set as the second sensing end 92. When the sliding block 3 moves to the extreme position in the direction close to the feed pipe 4, the distance between the first detection member 8 and the first sensing end 91 becomes larger, and the distance between the first detection member 8 and the second detection member 10 becomes smaller. At this time, the first detection member 8 can generate a first material winding signal. Conversely, when the sliding block 3 moves to the extreme position in the direction close to the discharge pipe, the distance between the first detection member 8 and the first sensing end 91 becomes smaller, and the distance between the first detection member 8 and the second sensing end 92 becomes larger. At this time, the first detection member 8 can generate a second material winding limit signal.

[0096] Among them, it should be noted that when the sliding block 3 moves to the extreme position in the direction close to the feed pipe 4, the movement resistance of the material line is too large, that is, the first material winding signal can be a feeding signal, and when the sliding block 3 moves to the extreme position in the direction close to the discharge pipe, the material line can be fed normally, that is, the second material winding signal can be a feeding signal.

[0097] This application also proposes a 3D printing device 200 .

[0098] According to an embodiment of the present application, the 3D printing device 200 includes a feeding component 203, an extrusion component 202, and any one of the above-mentioned material line conveying devices 100 for 3D printing devices. The feeding component 203 is connected to the feed pipe 4, and the extrusion component 202 is connected to the discharge pipe.

[0099] Specifically, the feeding component 203 is connected to the feed pipe 4, and the material line can be conveyed into the feed pipe 4 through the feeding component 203. At the same time, the extrusion component 202 is connected to the discharge pipe, and the material line can be conveyed to the extrusion component 202 through the discharge pipe, so as to provide the extrusion component 202 with the material line to meet the user's usage needs. In addition, a material line conveying device 100 for 3D printing equipment is set between the feeding component 203 and the extrusion component 202, and the material line can be conveyed from the feeding component 203 to the extrusion component 202 through the material line conveying device 100 for 3D printing equipment. The movement path of the material line can be shortened, the movement resistance of the material line can be reduced, the production efficiency and product quality can be improved, and the movement of the sliding block 3 can be buffered to ensure the smooth movement of the sliding block 3.

[0100] In some embodiments, the 3D printing device 200 further includes a control module, the feeding assembly 203 is provided with a feed drive, and the extrusion assembly 202 is provided with a discharge drive; wherein the control module is used to control the action of the feed drive and / or the discharge drive.

[0101] Specifically, a feed drive is provided in the feeding component 203, and the feed drive can provide driving force to the material line in the feeding component 203 to transport the material line. A discharge drive is provided at the extrusion component 202, and the discharge drive can provide driving force to the material line at the extrusion component 202. The feed drive and the discharge drive can ensure reliable transportation of the material line, thereby ensuring the smoothness of the printing process, and the control module can be electrically connected to the first detection component 8, so that the first material winding signal or the second material winding signal generated by the first detection component 8 can be transmitted to the control module, so that the control module can control the actions of the feed drive and the discharge drive according to the first material winding signal and the second material winding signal respectively.

[0102] Furthermore, the control module can drive the feed drive member to move according to the first winding signal to transport the material line from the feeding component 203 to the buffer chamber 31, or the control module can drive the discharge drive member to move according to the second winding signal to transport the material line from the buffer chamber 31 to the extrusion component 202.

[0103] In some embodiments, there are two material line conveying devices 100 for 3D printing equipment, and the two material line conveying devices 100 for 3D printing equipment are arranged side by side.

[0104] Specifically, the material line conveying device 100 for the 3D printing device is used to convey the material line. As shown in Figures 5 and 6, two material line conveying devices 100 for the 3D printing device can be simultaneously arranged in the 3D printing device 200, that is, the material line can be conveyed separately or simultaneously by the two material line conveying devices 100 for the 3D printing device, and the two material line conveying devices 100 for the 3D printing device are arranged side by side, that is, the two material line conveying devices 100 for the 3D printing device are spaced apart to avoid interference between the two, which results in the inability to convey the material line, and the two material line conveying devices 100 for the 3D printing device can convey multiple material lines at the same time, which can improve printing efficiency and avoid printing interruption. Moreover, when one of the material line conveying devices is replaced or repaired, the other material line conveying device 100 for the 3D printing device can continue to work, reducing the downtime caused by maintenance, and the two material line conveying devices 100 for the 3D printing device can be controlled separately, which can improve the flexibility and adaptability of the printing process.

[0105] It should be noted that, in actual design, two material line housings 1 of the material line conveying devices 100 for 3D printing equipment can also be integrated.

[0106] In some embodiments, the 3D printing device 200 further includes a chassis 201 , and the material line conveying device 100 for the 3D printing device is located inside the chassis 201 .

[0107] Specifically, the material line conveying device 100 for the 3D printing equipment is arranged on the inner side of the chassis 201, so that the chassis 201 can provide a setting space for the material line conveying device 100 for the 3D printing equipment, and the chassis 201 can protect the material line conveying device 100 for the 3D printing equipment to avoid damage and failure of the material line conveying device 100 for the 3D printing equipment due to accidental bumps, and the material line conveying device 100 for the 3D printing equipment can be arranged toward the front side of the chassis 201, that is, toward the direction close to the user, so as to facilitate observation and maintenance of the material line conveying device 100 for the 3D printing equipment.

[0108] In some embodiments, the chassis 201 is provided with an openable and closable door, and the sliding block 3 is provided with a pushing protruding handle 32 , which is protruding toward the door.

[0109] Specifically, a door that can be opened and closed is provided on the chassis 201, and the chassis 201 can be opened or closed by opening and closing the door. When the chassis 201 is opened, the material line conveying device 100 for the 3D printing equipment can be set or removed. When the door is closed, the material line conveying device 100 for the 3D printing equipment can be protected, and the pushing protrusion 32 on the sliding block 3 is set toward the direction of the door, so that the user can operate the pushing protrusion 32 when the door is opened, and the sliding block 3 drives the push-type joint 14 to move by pushing the protrusion 32, so that at least a part of the push-type joint 14 can be extended to the outside of the material line housing 1, so that the user can separate the discharge pipe from the push-type joint 14 and inspect the discharge pipe.

[0110] 8 , a schematic structural diagram of a material line resistance detection device of the present application is shown. The material line resistance detection device may specifically include the following components:

[0111] The extrusion assembly 202 is provided with an extrusion mechanism 110, which is used to drive the material line to the hot end. Among them, the heating block on the hot end can heat the material line, and the hot end is extruded to form a 3D model.

[0112] The feeding assembly 203 is provided with a feeding channel 210. The feeding port of the feeding channel 210 is used to receive the material line from the feeding device. The discharge port of the feeding channel 210 faces the extrusion assembly 202, and the extrusion assembly 202 can move relative to the feeding assembly 203 along the direction of the material line in the feeding channel 210. The material line of the feeding device is transported from the feeding port 700 of the feeding device to the feeding port of the feeding channel 210.

[0113] The feeding channel 210 has at least one feeding port and one discharging port, that is, the feeding channel 210 can be a feeding channel 210 for a single-line material or a feeding channel 210 for multiple-line materials.

[0114] An elastic element 300 is connected to the extrusion assembly 202 at one end and to the feeding assembly 203 at the other end, and is used 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 can be disposed between the extrusion assembly 202 and the feeding assembly 203.

[0115] The trigger element 400 is disposed in one of the extrusion component 202 or the feeding component 203 .

[0116] The detection element 500 is provided in the other one of the extrusion component 202 or the feeding component 203 , and is used to detect the relative distance or the change of the relative distance between the extrusion component 202 and the feeding component 203 by detecting the relative distance to the trigger element 400 .

[0117] In some feasible embodiments, the wire resistance detection device can be installed at any location along the wire transmission path. The trigger element and detection element can be installed at any location along the wire transmission path. For example, they can be installed on the wire box, on the chassis of the 3D printing device, or on the wire support, etc.

[0118] For example, the trigger element 400 is disposed on the extrusion component 202, and the detection element 500 is disposed on the feeding component 203. The trigger element 400 and the detection element 500 are components disposed in pairs.

[0119] The material line is usually wound around the material tray, stacked layer by layer, and the tail end of the material line is fixed on the material tray. If the material line slips out of the material tray during printing, or the tail end of the material line is fixed to the material tray and cannot be loosened after the material line is used up, it will cause the material line resistance to increase or the material line to get stuck. Since the extrusion component 202 and the feeding component 203 can move when the line resistance is too large, the relative distance between the extrusion component 202 and the feeding component 203 can determine the size of the line resistance.

[0120] In an optional implementation of the present application, the feeding device has a feeding tray.

[0121] In the present application, the feeding device is provided with a material tray on which wire material is wound.

[0122] In an optional implementation of the present application, the material line of the material tray is sent out from the feeding port of the feeding device to the feed port of the feeding channel 210, and a material line pipe 600 is provided between the feeding port of the feeding device and the feed port of the feeding channel 210, so that the material line length between the feeding port of the feeding device and the feed port of the feeding channel 210 is the length of the material line pipe 600.

[0123] By providing the material line tube 600, the material feed from the feed tray through the feed port of the feed device is guided by the material line tube 600 to the feed port of the feed channel 210. When the material resistance increases, a force is generated that shortens the distance between the material tray and the extrusion assembly 202. Since the length of the material line tube 600 remains unchanged, the feed assembly 203 moves closer to the extrusion assembly 202, thereby changing the relative distance between the feed assembly 203 and the extrusion assembly 202. Therefore, the increase in material resistance can be determined based on the shortening of the relative distance between the feed 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 feed assembly 203 and the extrusion assembly 202, the greater the resistance, thus determining the magnitude of the resistance. Furthermore, the reduction in the relative distance between the extrusion assembly 202 and the feed assembly 203 caused by excessive resistance can mitigate the impact of excessive resistance, providing time for timely response during high-speed printing.

[0124] In an optional implementation of the present application, the extrusion assembly 202 is provided with a receiving cavity 120 , and the discharge port of the feeding assembly 203 is sleeved in the receiving cavity 120 .

[0125] The extrusion assembly 202 is internally provided with a housing chamber 120. This housing chamber 120 can be an open housing chamber 120, as shown in FIG1 , and has no top surface above the housing chamber 120. The discharge port of the feed assembly 203 is sleeved within the housing chamber 120. This structure stabilizes the spatial relationship between the feed assembly 203 and the extrusion assembly 202.

[0126] In an optional implementation of the present application, a slide groove is provided in the accommodating cavity 120 , and the slide groove is used to guide the direction of relative movement between the extrusion component 202 and the feeding component 203 .

[0127] A slide groove is provided inside the accommodating cavity 120, and the protrusion on the outer side surface of the feeding component 203 can be slidably connected to the slide groove. When the extrusion component 202 and the feeding component 203 move relative to each other, the direction of the relative movement of the two is guided to avoid movement dislocation of the extrusion component 202 and the feeding component 203.

[0128] Specifically, the chute is an elongated hole, and the trigger element 400 is disposed on a protrusion on the outer side of the feed assembly 203. The protrusion protrudes into the chute so as to be slidably connected to the chute. The detection element 500 can be disposed on the elongated hole. The chute is an opening that connects to the outside of the accommodating cavity to facilitate detection by the detection element 500.

[0129] The chute is an elongated hole, along which the feed assembly 203 moves axially. The trigger element 400 can be located on a protrusion on the outer side of the feed assembly 203, which protrudes into the chute. The detection element 500 is located on the elongated hole so that when the feed assembly 203 and the extrusion assembly 202 move relative to each other, the detection element 500 can directly detect the relative distance between them.

[0130] In addition, a stopper may be provided on the accommodating chamber 120 of the extrusion assembly 202 to limit the sliding position of the feed assembly 203 when it moves away from the extrusion assembly 202, thereby preventing the feed assembly 203 from escaping from the accommodating chamber 120. The stopper may be an inclined surface that contacts the feed assembly 203.

[0131] The stopper may also be a lid having a through hole in the accommodating chamber 120. The lid can be snap-fitted to the accommodating chamber 120, and the middle portion of the discharge port of the feed assembly 203 can pass through the through hole. However, the discharge port of the feed assembly 203 has a protrusion on the end near the extrusion assembly 202, preventing the discharge port from detaching from the through hole in the lid. Specifically, the discharge port has a protrusion on one side of the end near the extrusion assembly 202, and the through hole in the lid has an opening through which the protrusion passes. When the discharge port is rotated to a first angle relative to the lid, the protrusion and the opening can align, allowing the discharge port to detach from the through hole. However, when the discharge port is rotated to a second angle relative to the lid, the discharge port cannot detach from the through hole in the lid. Furthermore, when the lid is snap-fitted to the accommodating chamber 120, the inner wall of the accommodating chamber can limit the protrusion so that the protrusion cannot align with the opening. In other words, the discharge port cannot rotate to the first angle relative to the lid and is restricted to the second angle.

[0132] In an optional implementation of the present application, as shown in FIG8 , the discharge port of the feeding component 203 is cylindrical, and the elastic element 300 includes a spring, one end of which is sleeved on the discharge port, and the other end abuts against the extrusion component 202 .

[0133] As shown in FIG8 , the elastic element 300 can be, for example, a cylindrical coil spring. Specifically, an annular protrusion matching the size of the spring can be provided within the extrusion assembly 202, and the spring can abut against the inside or outside of the annular protrusion. Specifically, the annular protrusion can also form a groove with the inner wall of the accommodating cavity 120 to accommodate the other end of the spring.

[0134] When the material line has no resistance or the resistance is small, the spring, based on its own elastic force, presses against the feed assembly 203 within the accommodating chamber 120, preventing the feed assembly 203 from sliding down due to its own gravity and causing relative movement with the extrusion assembly 202, which would affect the detection results. When the material line is subject to resistance or the resistance is too large, the relative movement of the feed assembly 203 and the extrusion assembly 202 compresses the spring. When the material line resistance is eliminated, the spring, based on the elastic force generated by the compression, resets the feed assembly 203 and the extrusion assembly 202. After the abnormal material line resistance is eliminated, the feed assembly 203 and the extrusion assembly 202 are automatically reset. In addition, due to the presence of the spring, the smaller the relative distance, the greater the resistance. Therefore, the magnitude of the resistance can be determined so that it can be detected in advance before the resistance affects printing and an early warning is issued, thereby preventing the print quality from being affected. Moreover, once an abnormal resistance occurs, the relative movement of the feeding component 203 and the extrusion component 202 allows the material line between the feeding component 203 and the extrusion component 202 to be temporarily used for printing, thereby providing time for timely response during high-speed printing, so as to make timely responses or related processing, such as pausing printing and informing the user.

[0135] In an optional implementation of the present application, the extrusion mechanism 110 includes a first extrusion wheel and a second extrusion wheel that are symmetrically arranged based on the material line, and the first extrusion wheel and the second extrusion wheel jointly extrude the material line.

[0136] In the present application, 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 co-extrude the feed line; that is, both sides of the feed line are squeezed, thereby evenly pulling the feed line. This results in smoother feed line movement, less interference in detecting feed line resistance, and more accurate results. Furthermore, the gap between the first and second extrusion wheels can be slightly smaller than the width of the feed line to enable friction-based feed line conveyance.

[0137] In an optional implementation of the present application, the trigger element 400 includes a magnetic element;

[0138] Correspondingly, the detection element 500 includes a Hall sensor for detecting the distance from the magnetic element.

[0139] The trigger element 400 can be, for example, a magnet. The magnetic element is embedded in the feeding component 203, that is, fixed in the feeding component 203. 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, that is, the relative distance between the magnetic element and the magnetic element can be determined by the output voltage of the Hall detection circuit, and then the wire resistance can be determined. The magnetic element can be arranged on a protrusion on the outer side of the feeding component 203, and the protrusion protrudes into the chute opened on the outer wall of the extrusion component 202 so as to be slidably connected to the chute. The Hall sensor can be arranged outside the chute. The magnetic element can also be embedded in the feeding channel 210. In order to enable those skilled in the art to clarify the detection process of the present application, refer to Figure 1, and take the Hall sensor as the detection element 500 and the magnetic element as the trigger element 400 as an example for explanation:

[0140] When the 3D printer is working normally, the extrusion assembly 202 pulls the material line to move. If the material line resistance is no resistance or very small, the spring will prevent the relative movement of the feeding assembly 203 and the extrusion assembly 202. The feeding assembly 203 is located above the accommodating cavity 120. At this time, the Hall sensor will detect that the relative distance of the trigger element 400 is the longest.

[0141] When the material line resistance becomes larger or too large, as the extrusion mechanism 110 moves the material line downward, the material line length between the material tray or feeding device and the extrusion assembly 202 will become shorter, and the feeding assembly 203 will move downward accordingly, compressing the elastic element 300. The magnetic element moves with the feeding assembly 203, and the position of the magnetic element is detected in the Hall sensor to obtain the distance between it and the magnetic element, and then the material line resistance is calculated. When the material line resistance is different, the elastic element 300 is compressed to different lengths, corresponding to different positions of the trigger element 400, and the distance between the trigger element 400 and the Hall sensor is different. Therefore, the material line resistance can be detected based on the position of the trigger element 400 to the detection magnetic element. When the resistance is too large, printing can be paused in time to check the cause of the abnormality, cut off the material line and return it, and then the user is prompted that the material line resistance is too large, and printing can be continued after returning to normal.

[0142] In an optional implementation of the present application, the trigger element 400 includes a protrusion (not shown in the figure),

[0143] Correspondingly, the detection element 500 includes at least one travel switch (not shown). When the relative distance between the extrusion assembly 202 and the feeding assembly 203 reaches a preset value, the protrusion contacts and triggers the travel switch. In other words, the protrusion moves with the feeding assembly 203 and contacts the travel switch as the feeding assembly 203 moves toward the extrusion assembly 202.

[0144] In practical applications, a travel switch can be used as the detection element 500, and resistance detection can be performed using a detection method that corresponds to different resistance values ​​based on the moving position. The trigger element 400 includes a protrusion, which is located on the side of the feed assembly 203 facing the accommodating chamber 120 or on the bottom facing the extrusion mechanism 110. This allows the protrusion to contact the travel switch during the sliding of the feed assembly 203. There is at least one travel switch, which can be located on the inside of the accommodating chamber 120 and arranged along the extrusion assembly 202 and the feed assembly 203 in the direction of the feed line in the feed channel 210. If there are multiple travel switches, they can be distributed at equal or variable intervals, which is not specifically limited in this application. When the feed assembly 203 and the extrusion assembly 202 move relative to each other, when the protrusion contacts the travel switch corresponding to different resistance values ​​(different travel switch positions correspond to different resistance values), the relative distance between the extrusion assembly 202 and the feed assembly 203 reaches the corresponding preset value, indicating that the resistance of the feed line has reached the corresponding resistance value.

[0145] In an optional implementation of the present application, the displacement between the extrusion component 202 and the feeding component 203 can also be detected by a grating sensor.

[0146] In an optional implementation of the present application, the trigger element 400 includes a metal element; correspondingly, the detection element 500 includes an eddy current coil for detecting the distance to the metal element.

[0147] The metal element can be mounted on a protrusion on the outer side of the feed assembly 203, which protrudes into a chute opened on the outer wall of the extrusion assembly 202 for sliding connection to the chute. The eddy current coil can be mounted outside the chute. The metal element can also be embedded in the feed channel 210.

[0148] In an optional implementation of the present application, the detection element 500 includes: a force sensor (not shown in the figure), the elastic element 300 may also not be provided, the trigger element 400 is a protrusion, and accordingly, the positional relationship between the extrusion component 202 and the feeding component 203 may be fixed, and the two are abutted against each other through the protrusion and the force sensor. When the resistance increases or is too large, the extrusion component 202 generates pressure to the force sensor on the feeding component 203 through the protrusion to indicate the resistance encountered by the material line.

[0149] In an optional implementation of the present application, the detection element 500 includes a force sensor (not shown in the figure), and the trigger element 400 may not be provided, and the elastic element 300 abuts against the force sensor. The resistance is detected by detecting the elastic force of the spring.

[0150] The types of the force sensor include but are not limited to strain tube type, diaphragm type, and strain beam type, which are not limited in this application.

[0151] 9 , a schematic structural diagram of a 3D printer print head of the present application is shown; the 3D printer print head includes the material line resistance detection device 800 and the hot end 900 as described above,

[0152] The extrusion mechanism of the material line resistance detection device 800 is used to drive the material line to be transmitted to the hot end 900.

[0153] The feeding assembly 203 of the material line resistance detection device 800 is used to receive the material line from the feeding device.

[0154] 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.

[0155] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0156] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0157] In the description of this application, “plurality” means two or more.

[0158] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0159] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0160] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0161] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A material line conveying device for 3D printing equipment, wherein: include: Material line housing; A fixed pipe and a sliding block, wherein the fixed pipe is installed on the material 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 the feeding assembly, and the sliding block is slidably installed on the material line housing, a buffer cavity connected to 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 the discharge pipe connected to the buffer cavity, and the other end of the discharge pipe is used to couple the 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; The first elastic member abuts between the fixed pipe and the side of the sliding block facing the feed pipe, the second elastic member abuts between the material line housing and the side of the sliding block facing the discharge pipe, or the first elastic member and the second elastic member are both arranged between the fixed pipe and the sliding block, and the second elastic member is sleeved outside the first elastic member.

2. The material line conveying device for 3D printing equipment according to claim 1, wherein: Also includes: A first detection member and a first trigger member, wherein the first detection member is arranged in one of the material line housing and the sliding block, and the first trigger member is arranged in the other of the sliding block and the material line housing, and the first detection member is used to detect the relative distance or the change of the relative distance with the first trigger member to detect the relative distance or the change of the relative distance between the extrusion component and the feeding component.

3. The material line conveying device for 3D printing equipment according to claim 1 or 2, wherein: The first elastic member is in a compressed state, and / or the second elastic member is in a compressed state.

4. The material line conveying device for 3D printing equipment according to any one of claims 1 to 3, wherein: When the second elastic member is sleeved outside the first elastic member, there is a sliding distance between the sliding block and the material line housing.

5. The material line conveying device for 3D printing equipment according to any one of claims 1 to 4, wherein: Also includes a second detection member and a second trigger member; The second detection member is relatively fixed to the fixed pipe, and the second trigger member is movably mounted on the fixed pipe along an axial direction perpendicular to the fixed pipe and at least partially extends into the fixed pipe; Wherein, the material line is transmitted in the fixed pipe along the axial direction of the fixed pipe.

6. The material line conveying device for 3D printing equipment according to claim 5, wherein: The second detection member is used to detect the relative distance or the change of the relative distance with the second trigger member to detect whether the material line enters the fixed pipeline.

7. The material line conveying device for 3D printing equipment according to claim 5 or 6, wherein: It also includes an elastic reset member, one end of which is fixedly arranged relative to the fixed pipe, and the other end of which is connected to the second trigger member.

8. The material line conveying device for 3D printing equipment according to any one of claims 5 to 7, wherein: The second trigger member is formed with an inclined pushing portion, the inclined pushing portion extends into the fixed pipe, the inclined pushing portion is formed with an inclined pushing surface, and the inclined pushing surface is inclinedly arranged along the feeding direction of the material line.

9. The material line conveying device for 3D printing equipment according to any one of claims 1 to 8, wherein: It also includes a push-type joint, which is used to connect the sliding block and the discharge pipe. The push-type joint includes a push-to-unlock part. The material line shell is provided with 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 push-to-unlock part.

10. The material line conveying device for 3D printing equipment according to claim 9, wherein: The sliding block is also provided with a pushing lug, and the pushing lug extends to the outside of the material line housing along an axial direction perpendicular to the discharge pipe.

11. The material line conveying device for 3D printing equipment according to any one of claims 1 to 10, wherein: The material line housing is also formed with a limit flange, the limit flanges are in two groups and are spaced apart from each other, the sliding block is limit-installed between the two groups of the limit flanges and can slide along the limit flanges.

12. The material line conveying device for 3D printing equipment according to claim 11, wherein: Each group of the limiting flanges includes a first flange and a second flange, wherein the first flange and the second flange are spaced apart and distributed along the sliding direction of the sliding block and form an intermediate gap; The sliding block is suitable for sliding in from an end of the second flange away from the first flange, and the sum of the extension length of the first flange and the length of the middle gap is smaller than the extension length of the sliding block.

13. The material line conveying device for 3D printing equipment according to any one of claims 1 to 12, wherein: The material line housing is also provided with a first limiting portion, and the sliding block is pressed against the first limiting portion when the sliding block moves to an extreme position in a direction close to the feeding pipe.

14. The material line conveying device for 3D printing equipment according to claim 13, wherein: The first limiting portion is configured as a triangular block and is formed with an avoidance slope, and the avoidance slope is configured to be inclined along a feeding direction of the fixed pipe.

15. The material line conveying device for 3D printing equipment according to any one of claims 2 to 14, wherein: The first trigger member has a first sensing end and a second sensing end, the first sensing end and the second sensing end are spaced apart and distributed along the sliding direction of the sliding block, and the first detection member is located between the first sensing end and the second sensing end; Wherein, when the sliding block moves to the extreme position in the direction close to the feeding pipe, the first detecting member generates a first material entanglement signal, and when the sliding block moves to the extreme position in the direction close to the discharging pipe, the first detecting member generates a second material entanglement signal.

16. A 3D printing device, wherein: It comprises a feeding component, an extrusion component and a material line conveying device for a 3D printing device according to any one of claims 1 to 15, wherein the feeding component is connected to the feed pipe, and the extrusion component is connected to the discharge pipe.

17. The 3D printing device according to claim 16, wherein: 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; Wherein, the control module is used to control the action of the feed drive and / or the discharge drive.

18. The 3D printing device according to claim 16 or 17, wherein: There are two material line conveying devices for the 3D printing equipment, and the two material line conveying devices for the 3D printing equipment are arranged side by side.

19. The 3D printing device according to any one of claims 16 to 19, wherein: It also includes a chassis, and the material line conveying device for the 3D printing equipment is located on the inner side of the chassis.

20. The 3D printing device according to claim 19, wherein: The case is provided with an openable and closable case door, and the sliding block is provided with a pushing lug, which is protruding toward the case door.

Images