Cutter device, 3D printer and wire placement assembly

Abstract

The utility model discloses a cutting device, 3D printer and line material placing subassembly relates to 3D printing technical field, and cutting device includes fixed frame, cutting knife module and buffer module, and fixed frame is equipped with the space of passing material, and the space of passing material is used to provide line material connection to the at least part path of printing head, cutting knife module is located in fixed frame, and cutting knife module is used for realizing the break of line material, buffer module includes mounting bracket and transmission shaft, and mounting bracket is connected to fixed frame, and transmission shaft is located in mounting bracket, and transmission shaft is equipped with the passage of passing material with the communication of space of passing material, and the passage of passing material is used to provide line material connection to the at least another part path of printing head, and transmission shaft has the first state and second state of position difference in the direction of at least another part path. The utility model provides technical scheme in the process of feeding and withdrawing material can cut material and buffer adjustment to line material, guarantees the reliability of 3D printing.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a cutting device, a 3D printer and a filament placement assembly. Background Technology

[0002] 3D printing technology has developed rapidly in recent years and has been widely used in industrial manufacturing, medical, aerospace and other fields, with an increasing demand for consumer-grade 3D printers. In the process of developing this application, the inventors discovered at least the following problems in the related technologies: poor stability of 3D printing. Utility Model Content

[0003] The main purpose of this invention is to provide a cutting device, a 3D printer, and a filament placement assembly, which aims to cut and buffer the filament during the feeding and unloading process, thereby improving the stability of 3D printing.

[0004] To achieve the above objectives, this utility model proposes a cutting device for use in a 3D printer. The 3D printer includes a print head for connecting filament, and the cutting device includes:

[0005] A mounting bracket is provided with a feed space for providing at least a partial path for the wire to connect to the print head;

[0006] A cutting module, mounted on the fixed frame, is used to cut the wire; and

[0007] A buffer module includes a mounting frame and a transmission shaft. The mounting frame is connected to the fixed frame, and the transmission shaft is disposed on the mounting frame. The transmission shaft has a material feeding channel communicating with the material feeding space. The material feeding channel is used to provide at least another part of the path for the wire to connect to the print head. The transmission shaft has a first state and a second state with different positions in the direction of the at least other part of the path.

[0008] In one embodiment, one of the fixing frame and the mounting frame is provided with a mounting groove, and the other of the fixing frame and the mounting frame is mounted in the mounting groove.

[0009] In one embodiment, at least one of the fixing frame and the mounting frame is provided with a connecting hole, and the connecting hole is connected to a connector for connecting the fixing frame and the mounting frame.

[0010] In one embodiment, at least one of the connecting holes extends along the direction of the at least other portion of the path.

[0011] In one embodiment, one of the mounting bracket and the transmission shaft is provided with a slide rail, and the other of the mounting bracket and the transmission shaft is provided with a slider, the slider being confined to the slide rail, and the extension direction of the slide rail being consistent with the extension direction of the at least other part of the path.

[0012] In one embodiment, the buffer module further includes at least one first positioning sensor, which is disposed on the mounting bracket and is used to detect the position of the transmission shaft.

[0013] In one embodiment, the buffer module further includes a first elastic element, one end of which is connected to the transmission shaft, and the other end of which is connected to the mounting bracket.

[0014] In one embodiment, a first pneumatic connector is provided at one end of the material passage near the material passage, and / or a second pneumatic connector is provided at one end of the material passage near the material passage, wherein the first pneumatic connector and / or the second pneumatic connector are used to provide at least a partial path for the wire between the material passage and the material passage.

[0015] In one embodiment, the cutting module includes a drive member and a cutting blade. The drive member is disposed on the fixed frame and is used to position the cutting blade in a first position or a second position. When the cutting blade is in the first position, the at least part of the path is released, and when the cutting blade is in the second position, the wire is disconnected.

[0016] In one embodiment, the cutter module further includes at least one second positioning sensor, which is disposed on the mounting bracket and is used to detect the position of the cutter.

[0017] In one embodiment, the fixing frame is provided with a guide groove, and the cutter is at least partially disposed in the guide groove.

[0018] In one embodiment, the cutting device further includes a guide member disposed on the fixed frame. The guide member has at least two inlets and an outlet. The outlet is closer to the material passage space than the at least two inlets. The at least two inlets and the outlet are used to provide a path for the wire material outside the material passage space to enter the material passage space.

[0019] In one embodiment, the cutting device further includes a material breakage detection module disposed on the fixed frame. The material breakage detection module is located between the cutting module and the guide component, and is used to detect the breakage of the wire.

[0020] This utility model also proposes a 3D printer, comprising:

[0021] Organism;

[0022] A print head, which is disposed on the machine body, is used to connect wire materials;

[0023] As described above, the cutting device provides at least a partial path for the filament to connect to the printhead.

[0024] In one embodiment, the cutting device is detachably mounted on the machine body.

[0025] In one embodiment, the 3D printer further includes a filament placement device for placing the filament, the filament placement device being disposed on the machine body, and the cutting device providing at least a partial path for the filament to be connected from the filament placement device to the print head.

[0026] This utility model also proposes a filament placement assembly for use in a 3D printer, the 3D printer including a print head for connecting filament, and the filament placement assembly comprising:

[0027] A wire placement device, the wire placement device being used to place the wire;

[0028] As described above, the cutting device provides at least a portion of the path through which the filament is connected from the filament placement device to the printhead.

[0029] One of the above technical solutions has the following advantages or beneficial effects: the cutting module can cut the filament to prevent the molten end of the filament from regressing into the transfer tube, causing blockage and affecting material ejection and subsequent feeding. The buffer module can buffer the filament along the path based on the filament transfer status in the print head and transfer device, avoiding asynchronous transfer between different devices from affecting the printing stability of 3D printing, thereby improving the stability of 3D printing. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 A schematic diagram of the cutting device in one embodiment of this utility model;

[0032] Figure 2An exploded view of the cutting device in one embodiment of this utility model;

[0033] Figure 3 A schematic diagram of the structure of the fixing frame in one embodiment of this utility model;

[0034] Figure 4 A schematic diagram of the structure of a portion of the cutting module in one embodiment of this utility model;

[0035] Figure 5 Another perspective structural schematic diagram of the cutting device in one embodiment of this utility model;

[0036] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure along the middle section A-A';

[0037] Figure 7 for Figure 5 A schematic diagram of the cross-sectional structure along the B-B' axis.

[0038] Explanation of icon numbers:

[0039] 100. Cutting device; 1. Fixing frame; 11. Material passage space; 111. First pneumatic connector; 12. Frame body; 121. Mounting slot; 122. Connecting hole; 123. Collection port; 13. Mounting plate; 131. Through hole; 132. Slide rod; 14. Mounting base; 141. Material guide channel; 15. Guide groove; 2. Buffer module; 21. Mounting frame; 211. Slide rail; 212. First frame body; 213. Second frame body; 214. Guide tube; 215. Through hole; 22. Transmission shaft; 221. Material passage; 222. Slider; 2 23. Trigger protrusion; 224. Protrusion; 23. First positioning sensor; 24. First elastic element; 3. Cutting module; 31. Driving element; 32. Cutting blade; 321. Second through hole; 33. Transmission mechanism; 331. Gear; 332. Rack; 3321. Sliding hole; 34. Second positioning sensor; 35. Mounting block; 351. First through hole; 352. Third pneumatic connector; 4. Material guide; 41. Inlet; 42. Outlet; 5. Material breakage detection module; 51. Contact element; 52. Third positioning sensor; 53. Second elastic element;

[0040] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0042] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0043] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0044] In related technologies, during the printing process of a 3D printer, filament from the filament placement device is transported to the print head via a transfer tube. In monochrome 3D printers, the filament end is manually inserted into or removed from the print head during feeding or unloading. To automate the feeding and unloading process in monochrome 3D printers, a transfer device can be installed in the filament placement device. This works in conjunction with the transfer mechanism within the print head to feed filament into or unload it from the print head to the filament placement device. However, during unloading, the molten end of the filament may enter the transfer tube, causing blockage and affecting the unloading and subsequent feeding processes.

[0045] Please refer to the reference. Figures 1 to 7As shown, this utility model proposes a cutting device 100 for use in a 3D printer. The 3D printer includes a print head for connecting filament. The cutting device 100 includes a fixed frame 1, a cutting module 3, and a buffer module 2. The fixed frame 1 has a feed space 11 for providing at least a partial path for the filament to connect to the print head. The cutting module 3 is located on the fixed frame 1 and is used to disconnect the filament. The buffer module 2 includes a mounting frame 21 and a transmission shaft 22. The mounting frame 21 is connected to the fixed frame 1, and the transmission shaft 22 is located on the mounting frame 21. The transmission shaft 22 has a feed channel 221 communicating with the feed space 11. The feed channel 221 is used to provide at least another part of the path for the filament to connect to the print head. The transmission shaft 22 has a first state and a second state with different positions in the direction of the at least other part of the path.

[0046] In this embodiment, the mounting bracket 1 serves as the mounting structure for the cutting device 100. The cutting device 100 can be installed into the 3D printer via the mounting bracket 1, effectively reducing the difficulty of modifying the 3D printer. Before entering the print head from the transfer tube, the filament passes through the material passage space 11 of the mounting bracket 1 and the material passage channel 221 of the transfer shaft 22. During material ejection, the cutting module 3 can cut the filament to prevent the molten end of the filament from retracting into the transfer tube, causing blockage and affecting material ejection and subsequent loading. The mounting bracket 21 serves as the mounting structure for the transfer shaft 22, facilitating the modular production and installation of the buffer module 2, improving the production efficiency of the cutting device 100, and also facilitating the maintenance and replacement of the buffer module 2. The buffer module 2 can buffer the filament along the path according to the filament transmission status in the print head and the transfer device, preventing asynchronous transmission between different devices from affecting the printing stability and quality of 3D printing.

[0047] Specifically, the transfer frame can move along the direction set for another part of the path. Optionally, when the transfer shaft 22 is in the first state, it is located close to the print head; when the transfer shaft 22 is in the second state, it is located away from the print head. It is understood that both the feed / unfeed module and the print head provide power for the feed / unfeed transfer of the filament, and the transfer shaft 22 is located between the two. When the feed / unfeed module and the print head are not synchronized, the transfer shaft 22 will move relative to the mounting frame 21 to buffer the force on the filament and prevent breakage or even printing failure.

[0048] Optionally, the transmission shaft 22 and the printhead can be connected via a Teflon tube to prevent wire leakage. The mounting bracket 21 is detachably connected to the fixing bracket 1 by screws or clips. Optionally, the mounting bracket 21 and the fixing bracket 1 can be installed as a single unit.

[0049] Optionally, the mounting bracket 21 is provided with a guide tube 214, and the transmission shaft 22 is sleeved on the guide tube 214 to prevent the movement of the transmission shaft 22 from deviating.

[0050] Optionally, the buffer module 2 can be located on the side of the feed space 11 close to the print head, and the feed space 11 is connected to the feed channel of the print head through the feed channel 221; the buffer module 2 can also be located on the side of the feed space 11 away from the print head.

[0051] Understandably, the material handling space 11 refers to the space enclosed by the fixed frame 1. During material feeding and unloading, the wire material is transported through the transmission pipe within the material handling space 11. Pneumatic connectors are provided at both ends of the material handling space 11 for connecting the transmission pipe. At the same time, airflow can be introduced into the transmission shaft 22 and the transmission pipe to reduce the transmission resistance of the wire material and improve the smoothness of wire material transmission.

[0052] Optionally, the buffer module 2 and the cutter module 3 are respectively located on both sides of the fixed frame 1; the buffer module 2 and the cutter module 3 can also be located on the same side of the fixed frame 1, without any specific limitation.

[0053] In an embodiment of this utility model, one of the fixing frame 1 and the mounting frame 21 is provided with a mounting groove 121, and the other of the fixing frame 1 and the mounting frame 21 is installed in the mounting groove 121. Specifically, the fixing frame 1 is provided with a mounting groove 121, and a portion of the mounting frame 21 is limited in the mounting groove 121, or the mounting frame 21 is provided with a mounting groove 121, and a portion of the fixing frame 1 is limited within the mounting groove 121, thus facilitating the positioning and installation of the fixing frame 1 and the mounting frame 21.

[0054] In embodiments of this utility model, such as Figures 1 to 3 As shown, at least one of the fixing frame 1 and the mounting frame 21 is provided with a connecting hole 122. A connector is connected to the connecting hole 122, and the connector is used to connect the fixing frame 1 and the mounting frame 21. Specifically, both the fixing frame 1 and the mounting frame 21 may be provided with connecting holes 122, and the connector passes through the connecting hole 122 to fix the relative positions of the fixing frame 1 and the mounting frame 21. Alternatively, only one of the fixing frame 1 and the mounting frame 21 may be provided with a connecting hole 122, and the connector passes through the connecting hole 122 and abuts against the other to limit its movement, thereby fixing the relative positions of the fixing frame 1 and the mounting frame 21. The connector may be a bolt, screw, or pin, etc., and is not specifically limited here.

[0055] Optionally, at least one connection hole 122 extends along at least another portion of the path. Specifically, the connection hole 122 may be arranged in the form of a strip hole, allowing the relative positions of the fixing bracket 1 and the mounting bracket 21 to be adjusted according to the actual size of the module during assembly.

[0056] Optionally, multiple sets of connecting holes 122 and connecting parts are provided to improve the connection strength between the fixing bracket 1 and the mounting bracket 21.

[0057] In an embodiment of this utility model, as shown in Figures 1-2, one of the mounting bracket 21 and the transmission shaft 22 is provided with a slide rail 211, and the other of the mounting bracket 21 and the transmission shaft 22 is provided with a slider 222. The slider 222 is limited to the slide rail 211, and the extension direction of the slide rail 211 is consistent with the extension direction of at least another part of the path.

[0058] Specifically, the mounting bracket 21 may be equipped with a slide rail 211 and the transmission shaft 22 may be equipped with a slider 222, or the mounting bracket 21 may be equipped with a slider 222 and the transmission shaft 22 may be equipped with a slide rail 211.

[0059] In this embodiment, the transmission shaft 22 and the mounting bracket 21 are slidably connected through the cooperation of the slider 222 and the slide rail 211. During the feeding and unloading process, when the transmission tube and transmission shaft 22 become blocked or the drive of the print head and the transmission device are out of sync, the wire will drive the transmission shaft 22 to move along the slide rail 211, moving between the first state and the second state to buffer the force on the wire. The extension direction of the slide rail 211 is consistent with the extension direction of at least another part of the path, so that the moving direction of the transmission shaft 22 is consistent with the setting direction of at least another part of the path. This can reduce the resistance of the wire during normal transmission in the feed channel 221 and prevent the transmission shaft 22 from moving when the wire transmission is not abnormal.

[0060] Optionally, the transmission shaft 22 can be integrally set with the slider 222 to form the frame 12 structure, which facilitates sliding connection with the mounting frame 21.

[0061] Optionally, the slider 222 includes two sliders. Taking the mounting bracket 21 having a slide rail 211 and the transmission shaft 22 having a slider 222 as an example, the two sliders 222 are respectively located on both sides of the transmission shaft 22, and the two opposite side walls of the mounting bracket 21 have slide rails 211. The two sliders 222 are respectively limited to sliding within the two slide rails 211, which can make the force on the transmission shaft 22 uniform and improve the stability of the transmission shaft 22 during sliding. The slide rail 211 can be a groove recessed in the transmission shaft 22 or a groove formed by two limiting blocks protruding from the transmission shaft 22; no specific limitation is made here.

[0062] In embodiments of this utility model, such as Figure 2 and Figure 7 As shown, the buffer module 2 also includes at least one first positioning sensor 23, which is mounted on the mounting bracket 21 and is used to detect the position of the transmission shaft 22.

[0063] In this embodiment, the first positioning sensor 23 can be used to detect whether the transmission shaft 22 is in a first state or a second state, so as to adjust the transmission speed of the transmission device or the print head accordingly, so that the transmission speed of the transmission device and the print head tends to be synchronized.

[0064] In actual implementation, the transmission shaft 22 is positioned close to the print head in the first state and away from the print head in the second state. The first positioning sensor 23 is set corresponding to the position of the transmission shaft 22 in the first state. When the fabric transmission speed of the print head is less than the fabric transmission speed of the transmission device, the transmission shaft 22 moves towards the first state until the first positioning sensor 23 is triggered. The first positioning sensor 23 sends a speed adjustment signal to the print head or the transmission device to adjust the transmission speed of the print head or the transmission device, so that the transmission speeds of the two tend to be synchronized. Alternatively, the first positioning sensor 23 can be set corresponding to the position of the transmission shaft 22 in the second state. When the fabric transmission speed of the print head is greater than the fabric transmission speed of the transmission device, the transmission shaft 22 moves towards the second state until the first positioning sensor 23 is triggered. The first positioning sensor 23 sends a speed adjustment signal to the print head or the transmission device to adjust the transmission speed of the print head or the transmission device, so that the transmission speeds of the two tend to be synchronized.

[0065] It is understandable that the positions of the transmission shaft 22 in the first and second states correspond to the extreme positions of the transmission shaft 22's movement.

[0066] Optionally, two first positioning sensors 23 can be provided, with the two first positioning sensors 23 respectively positioned corresponding to the first state and the second state of the transmission shaft 22. Specifically, the two first positioning sensors 23 are spaced apart on the fixing frame 1, and the transmission shaft 22 is provided with a trigger protrusion 223. The trigger protrusion 223 is used to trigger the first positioning sensors 23 and the second positioning sensor 34 to determine the relationship between the transmission speed of the print head and the transmission speed of the transmission device, so as to adjust the transmission speed of the print head and the transmission device to be closer to synchronization.

[0067] Optionally, the mounting frame 21 includes a first frame 212 and a second frame 213, which are detachably connected and enclose a cavity. The buffer module 2 is disposed within the cavity to protect the first positioning sensor 23 and prevent it from being interfered with by the external environment. Alternatively, the slide can also be formed by the first frame 212 and the second frame 213.

[0068] Optionally, the mounting bracket 21 is provided with a through hole 215 communicating with the cavity, and the transmission shaft 22 is provided with a protrusion 224 passing through the through hole 215. When the mounting bracket 21 moves between the first state and the second state, the protrusion 224 also moves within the through hole 215. The through hole 215 can further improve the stability of the mounting bracket 21 during sliding movement. At the same time, the user can visually judge the position of the transmission shaft 22 by the position of the protrusion 224 within the through hole 215, so as to make corresponding judgments. The travel of the transmission shaft 22 can be adjusted by adjusting the length of the slide groove and the length of the through hole 215.

[0069] In practical implementation, the first position sensor 23 can be a non-contact position sensor such as a photoelectric sensor or an electromagnetic sensor, or it can be a micro switch or a mechanically triggered contact position sensor; no specific limitation is made here. In this embodiment, the first position sensor 23 is a through-beam photoelectric switch. When the contact protrusion 224 moves between the output end and the receiving end of the through-beam photoelectric switch, the through-beam photoelectric switch is triggered; when the contact member 51 leaves the space between the output end and the receiving end of the through-beam photoelectric switch, the through-beam photoelectric switch is no longer triggered.

[0070] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the buffer module 2 also includes a first elastic element 24, one end of which is connected to the transmission shaft 22, and the other end of which is connected to the mounting bracket 21.

[0071] In this embodiment, when the transmission speeds of the print head and the transmission device are not synchronized, the filament drives the transmission shaft 22 to move between the first and second states to buffer the force on the filament. When the transmission shaft 22 moves to the second state position away from the print head, the first elastic element 24 deforms; when the transmission speeds of the print head and the transmission device are synchronized, the first elastic element 24 applies a restoring force to the transmission tube, causing the transmission shaft 22 to move in the opposite direction to reset.

[0072] Optionally, when the transmission shaft 22 moves to the position of the second state, the first elastic element 24 can be in a compressed or stretched state depending on the setting position.

[0073] Optionally, when the first elastic element 24 is in an undeformed state, the transmission shaft 22 can be positioned at an intermediate position between the first and second states. Thus, regardless of whether the transmission shaft 22 moves towards the first or second state, the first elastic element 24 deforms. After the transmission speeds of the print head and the transmission device are synchronized, the first elastic element 24 provides a restoring force to the transmission shaft 22, causing it to reset.

[0074] In actual implementation, the first elastic element 24 is a spring, and the extension direction of the spring is consistent with the movement direction of the transmission shaft 22 to ensure the stability of the transmission shaft 22 when sliding.

[0075] In embodiments of this utility model, such as Figure 1 , Figure 2 , Figures 5 to 7 As shown, a first pneumatic connector 111 is provided at one end of the material passage 11 near the material passage 221. Optionally, a second pneumatic connector is provided at one end of the material passage 221 near the material passage 11. In some embodiments, the first pneumatic connector 111 and the second pneumatic connector can be provided simultaneously. The first pneumatic connector 111 and / or the second pneumatic connector are used to provide at least a partial path for the wire material between the material passage 11 and the material passage 221. The provision of the first pneumatic connector 111 and the second pneumatic connector facilitates the insertion of a transmission tube such as a Teflon tube into the material passage 11, thereby providing path space for the transmission of the wire material.

[0076] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cutter module 3 includes a drive unit 31 and a cutter 32. The drive unit 31 is mounted on the fixed frame 1. The drive unit 31 is used to position the cutter 32 in a first position or a second position. When the cutter 32 is in the first position, at least part of the path is released. When the cutter 32 is in the second position, the wire is disconnected.

[0077] In this embodiment, the fixing frame 1 serves as the mounting structure for the cutter module 3, and the driving component 31 drives the cutter 32 to move between a first position and a second position. During the material transfer process, the cutter 32 is in the first position, ensuring that the material transfer path is unobstructed and avoiding any impact on the material transfer. During material retraction, when the cutter module 3 needs to perform a cutting action, the driving component 31 drives the cutter 32 to move to the second position and cut the material. Afterward, the driving component 31 drives the cutter 32 back to the first position via the transmission mechanism 33, completing one cutting action.

[0078] Understandably, the wire material is conveyed at an angle to the moving direction of the cutter module 3, allowing the cutter 32 to cleanly and efficiently cut the wire material. Optionally, the blade direction of the cutter 32 is inclined to the wire material conveying direction, with the inclination angle ranging from 0° to 90°.

[0079] In actual implementation, the drive unit 31 can be an encoder actuator or an electric cylinder, etc. The drive unit 31 can control the start and stop of the cutter 32 and the drive path.

[0080] In some embodiments of this utility model, such as Figure 1 and Figure 2As shown, the cutter module 3 also includes a transmission mechanism 33. The drive unit 31 controls the start, stop, and movement of the cutter 32 through the transmission mechanism 33. The transmission mechanism 33 can be a cam mechanism, a lead screw and slide rail mechanism, etc., and the cutter 32 can be a translational cutter or a scissor-type rotary cutter; no specific limitation is made here.

[0081] Optionally, the transmission mechanism 33 includes a gear 331 and a rack 332. The gear 331 is connected to the output end of the drive member 31. The rack 332 is slidably disposed on the mounting plate 13 and meshes with the gear 331. The cutter 32 is connected to the rack 332. The moving direction of the rack 332 is set at an angle to the extension direction of part of the path.

[0082] The gear 331 and rack 332 mechanism can convert the rotational output of the drive 31 into the translational motion of the cutter 32, so that the cutter 32 can perform translational cutting on the wire material.

[0083] Specifically, the rack 332 is slidably connected to the mounting plate 13 via the slide rod 132. The slide rod 132 guides the movement of the rack 332, causing the rack 332 to drive the cutter 32 to move in a preset direction, and also improves the stability of the rack 332 and the cutter 32 during movement. In actual implementation, the rack 332 is provided with a sliding hole 3321 corresponding to the slide rod 132, and the slide rod 132 is confined within the sliding hole 3321 to achieve a sliding fit between the rack 332 and the mounting plate 13. Optionally, the slide rod 132 can also be mounted on the fixing frame 1.

[0084] In some embodiments, such as Figure 1 and Figure 2 As shown, the mounting bracket 1 includes a frame body 12 and a mounting plate 13. Optionally, the mounting plate 13 is connected to the frame body 12, and the mounting plate 13 is provided with a through hole 131 for avoiding obstruction of wire material, so that the wire material can be transported normally. Optionally, the mounting plate 13 and the frame body 12 are spaced apart to avoid obstruction of wire material.

[0085] Both the drive unit 31 and the transmission mechanism 33 are mounted on the mounting plate 13. When producing the cutting device 100, the mounting plate 13, drive unit 31, transmission mechanism 33 and cutting blade 32 can be assembled, and then the cutting module 3 can be installed on the frame 12. This allows for modular production and installation of the cutting module 3, which is beneficial to improving production efficiency. It also makes it easy to disassemble, repair or replace the cutting module 3 separately.

[0086] Specifically, due to the large size of the drive unit 31, it is mounted on the side of the mounting plate 13 near the buffer module 2 to fully utilize the mounting space of the fixing frame 1, making the cutting device 100 more compact. The gear 331, rack 332, and cutter 32 are located on the side of the mounting plate 13 away from the drive unit 31. The output end of the drive unit 31 passes through the mounting plate 13 and connects to the gear 331. The drive unit 31 drives the gear 331 to move the rack 332 and cutter 32. The cutter 32 moves towards the through hole 131 to cut the wire passing through the through hole 131, or is positioned in a second position away from the through hole 131 to avoid interfering with the passage of the wire. The mounting plate 13 can be detachably connected to the frame 12 by means of clips or screws.

[0087] In some embodiments of this utility model, such as Figure 4 As shown, the cutter module 3 includes a mounting block 35, on which a cutter 32 is mounted. The mounting block 35 has a first through hole 351, and the cutter 32 has a second through hole 321 corresponding to the first through hole 351. When the cutter 32 is in the second position, the wire is transmitted through the first through hole 351 and the second through hole 321. When the wire needs to be cut, the wire first moves along the path and exits from the first through hole 351 and the second through hole 321. The driving member 31 drives the mounting block 35 and moves the cutter 32 to the first position. At this time, the wire is then driven to move towards the cutter 32 to pass through the cutting edge of the cutter 32. After that, the driving member 31 drives the cutter 32 to the second position again to cut the wire.

[0088] Specifically, the mounting block 35 is located at one end of the material passage space 11 away from the material passage channel 221. The second opening is connected to the material passage channel 221 through a transmission pipe such as a Teflon tube, which forms a transmission path for the wire within the material passage space 11. When the wire is cut, it exits from the transmission pipe, and the molten end of the wire falls into the fixing frame 1. The fixing frame 1 can be equipped with a collection port 123 corresponding to the molten end of the wire to collect the cut portion of the wire.

[0089] Optionally, a third pneumatic connector 352 is provided at the end of the second opening near the material passage 221. This facilitates the user inserting a Teflon tube or other transmission tube into the material passage space 11. Gas can be introduced into the transmission tube supplying the wire material through the first pneumatic connector 111, the second pneumatic connector, and the third pneumatic connector 352 to reduce the transmission resistance of the wire material. Understandably, air vents can be opened on the side wall of the pneumatic connectors to introduce positive or negative pressure into the transmission tube; the specific air pressure can be set according to the transmission direction of the wire material.

[0090] In actual implementation, the mounting block 35 can be integrated with the rack 332, or it can be directly driven by the drive component 31.

[0091] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cutter module 3 also includes at least one second positioning sensor 34, which is disposed on the fixing frame 1 and is used to detect the position of the cutter 32.

[0092] In this embodiment, the second position sensor 34 can be set to a first position or a second position of the cutter 32 in order to determine whether the cutter 32 has completed its cutting action.

[0093] Optionally, the second positioning sensor 34 is set to correspond to the first position of the cutter 32. When the cutter 32 is in the first position, the second positioning sensor 34 is triggered, and the wire can be transmitted normally. When the cutter 32 moves away from the first position to the second position, the second positioning sensor 34 stops triggering, the cutter 32 cuts the wire, and after the cutting is completed, the wire returns to the first position, the second positioning sensor 34 is triggered again, and it is determined that the cutting action of the wire is completed.

[0094] Optionally, the second positioning sensor 34 is set to correspond to the second position of the cutter 32. When the cutter 32 is in the first position, the first positioning sensor 23 is not triggered. When the cutter 32 moves from the first position to the second position and reaches the second position, the second positioning sensor 34 is triggered, and the cutter 32 cuts the wire. After the cutting is completed, the wire returns to the first position, the second positioning sensor 34 stops triggering, and it is determined that the cutting action of the wire is completed.

[0095] Optionally, the second positioning sensor 34 includes two sensors, which are respectively set to the first position and the second position of the cutter 32 to improve the accuracy of the position judgment of the cutter 32.

[0096] In actual implementation, the second position sensor 34 detects the position of the cutter 32 by judging the position of the rack 332. The second position sensor 34 can be a non-contact position sensor such as a photoelectric sensor or an electromagnetic sensor, or it can be a contact position sensor triggered by a micro switch or mechanical trigger; no specific limitation is made here.

[0097] In an embodiment of this utility model, the fixing frame 1 is provided with a guide groove 15, and the cutter 32 is at least partially disposed in the guide groove 15. The guide groove 15 is used to guide the cutter 32 to avoid the cutter 32 from becoming skewed during movement, which would affect the cutting effect on the wire.

[0098] In embodiments of this utility model, such as Figure 1 , Figure 2 , Figures 5 to 7As shown, the cutting device 100 also includes a guide member 4 disposed on the fixed frame 1. The guide member 4 is provided with at least two inlets 41 and outlets 42. The outlets 42 are closer to the material passage space 11 than the at least two inlets 41. The at least two inlets 41 and outlets 42 are used to provide a path for wire material outside the material passage space 11 to enter the material passage space 11.

[0099] In this embodiment, the filament enters the cutting device 100 from the guide 4. Each inlet 41 can supply filament of one color, and the outlet 42 only allows one filament to exit. The feed and discharge module drives the filament to pass through the inlet 41 and then out of the outlet 42 to feed the print head. This allows the cutting device 100 to simultaneously accept multiple different filaments, facilitating the switching between different filaments to the print head, thereby achieving multi-color printing.

[0100] In actual implementation, the guide component 4 is provided with a guide cavity, and all the inlets 41 and outlets 42 are connected to the guide cavity at the same time. The guide cavity is used to guide the incoming wire material to move towards the inlet 41.

[0101] Optionally, the guide component 4 is located on the side of the cutter module 3 away from the print head.

[0102] In embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the cutting device 100 also includes a material breakage detection module 5 disposed on the fixed frame 1. The material breakage detection module 5 is located between the cutting module 3 and the guide component 4. The material breakage detection module 5 is used to detect the breakage of the wire material.

[0103] In this implementation, the material breakage detection module 5 can detect whether the end of the wire has passed through, and based on this, can detect whether the wire has been successfully cut and successfully fed. The user judges whether the wire feeding and unloading is smooth based on the detection results of the material breakage detection module 5, so that the user can troubleshoot the fault in a timely manner.

[0104] Specifically, the material breakage detection module 5 includes a contact member 51 and a third positioning sensor 52. The contact member 51 is movably mounted on the fixed frame 1, and the third positioning sensor 52 is mounted on the fixed frame 1. The third positioning sensor 52 is used to detect the position of the contact member 51.

[0105] Optionally, the mounting frame 1 includes a frame body 12 and a mounting base 14. The mounting base 14 is provided with a material guide channel 141 communicating with the discharge port 42. The mounting base 14 is connected to the frame body 12, the contact member 51 is movably disposed on the mounting base 14, and the third positioning sensor 52 is disposed on the mounting base 14. Understandably, the material breakage detection module 5 is disposed between the material guide frame and the cutter module 3.

[0106] Specifically, during the unloading process, the wire material is conveyed to the guide member 4 via the guide channel 141. The contact member 51 is movably mounted on the mounting base 14 and extends at least partially into the guide channel 141 to abut against the wire material within the guide channel 141. When the contact member 51 abuts against the wire material within the guide channel 141, the contact member 51 is in the third position, and the third positioning sensor 52 is continuously triggered to determine that wire material has passed through the guide channel 141; when the contact member 51 is not in contact with the wire material, the contact member 51 is in the fourth position, and the fifth positioning sensor is no longer triggered to determine that no wire material has passed through the guide channel 141.

[0107] During the feeding and unloading process, the position of the wire end can be determined by the change in the state of the third positioning sensor 52 between triggered and non-triggered states. During unloading, the successful unloading is determined by the change of the third positioning sensor 52 from a triggered state to a non-triggered state. During feeding, the successful feeding is determined by the change of the third positioning sensor 52 from a non-triggered state to a triggered state.

[0108] Understandably, during the unloading process, the molten end of the wire can be withdrawn to the contact 51 first, so that the third positioning sensor 52 is switched to an untriggered state. Then, the wire is moved in the feeding direction. The feeding length of the wire can be determined by the duration of the third positioning sensor 52 switching to the triggered state again, thereby controlling the cutting length of the cutter module 3 to reduce wire waste.

[0109] In actual implementation, the mounting base 14 can be detachably connected to the fixing frame 1 by means of clips or screws. In this embodiment, the third position sensor 52 can be a non-contact position sensor such as a photoelectric sensor or an electromagnetic sensor, or it can be a contact position sensor triggered by a micro switch or mechanical trigger; no specific limitation is made here.

[0110] In embodiments of this utility model, such as Figure 1 , Figure 2 and Figure 7 As shown, the material breakage detection module 5 also includes a second elastic element 53, one end of which is connected to the fixing frame 1, and the other end of which is connected to the contact element 51.

[0111] In this embodiment, the contact 51 is elastically connected to the fixing frame 1 via the second elastic member 53. When the wire passes through the guide channel 141 and abuts against the contact 51, the contact 51 moves to the third position, at which point the second elastic member 53 deforms. When there is no wire in the guide channel 141 abutting against the contact 51, the second elastic member 53 drives the contact 51 to reset to the fourth position. The second elastic member 53 allows the contact 51 to tightly abut against the wire and promptly change to the fourth position as the end of the wire enters or leaves the guide channel 141, improving the timeliness and accuracy of the third positioning sensor 52.

[0112] This utility model also proposes a 3D printer, which includes a cutting device 100, a print head, and a body. The specific structure of the cutting device 100 is as described in the above embodiments. Since this 3D printer adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The print head is located in the body and is used to connect filament. The cutting device 100 provides at least a partial path for the filament to connect to the print head.

[0113] In an embodiment of this utility model, the cutting device 100 is detachably mounted on the machine body.

[0114] Specifically, the cutter device 100 is detachably connected to the machine body via clips or screws, allowing users to install the cutter device 100 independently. In actual implementation, the print head is mounted on the drive unit of the machine body.

[0115] In an embodiment of this utility model, the 3D printer further includes a filament placement device for placing filament, the filament placement device being disposed in the machine body, and the cutting device 100 providing at least a partial path for the filament to be connected from the filament placement device to the print head.

[0116] This utility model also proposes a filament placement assembly for use in a 3D printer. The 3D printer includes a print head for connecting filament. The filament placement assembly includes a filament placement device and a cutting device 100. The specific structure of the cutting device 100 is as described in the above embodiments. Since this filament placement device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The filament placement device is used to place the filament; the cutting device 100 provides at least a partial path for the filament to connect from the filament placement device to the print head.

[0117] An embodiment of this utility model also provides another cutting device 100, applied to a 3D printer, the 3D printer including a print head for connecting filament.

[0118] The cutting device 100 includes a fixing frame 1 and a buffer module 2. The fixing frame 1 has a feed space 11, which provides at least a partial path for the wire to connect to the print head. The buffer module 2 includes a mounting frame 21 and a transmission shaft 22. The mounting frame 21 is connected to the fixing frame 1, and the transmission shaft 22 is disposed on the mounting frame 21. The transmission shaft 22 has a feed channel 221 communicating with the feed space 11. The feed channel 221 provides at least another partial path for the wire to connect to the print head. The transmission shaft 22 has a first state and a second state with different positions in the direction of the at least other partial path. A first pneumatic connector 111 is provided at one end of the feed space 11 near the feed channel 221, and / or a second pneumatic connector is provided at one end of the feed channel 221 near the feed space 11. The first pneumatic connector 111 and / or the second pneumatic connector provide at least a partial path for the wire between the feed space 11 and the feed channel 221. Other structures of the alternative cutting device 100, the specific structure of the first pneumatic connector 111, the specific structure of the second pneumatic connector, and the beneficial effects thereof can be found in the above embodiments, and will not be repeated here.

[0119] The present invention also provides another 3D printer, which includes the cutting device 100 of the above embodiment. Other structures and beneficial effects of the 3D printer can be found in the above embodiment, and will not be repeated here.

[0120] The embodiments of this utility model also provide another wire placement assembly, which includes the other cutting device 100 described above. Other structures and beneficial effects of this wire placement assembly can be found in the above embodiments, and will not be repeated here.

[0121] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cutting device for use in a 3D printer, the 3D printer including a print head for connecting filament, characterized in that, The cutting device includes: A mounting bracket is provided with a feed space for providing at least a partial path for the wire to connect to the print head; A cutting module, mounted on the fixed frame, is used to cut the wire; and A buffer module includes a mounting frame and a transmission shaft. The mounting frame is connected to the fixed frame, and the transmission shaft is disposed on the mounting frame. The transmission shaft has a material feeding channel communicating with the material feeding space. The material feeding channel is used to provide at least another part of the path for the wire to connect to the print head. The transmission shaft has a first state and a second state with different positions in the direction of the at least other part of the path.

2. The cutting device as described in claim 1, characterized in that, One of the fixing frame and the mounting frame is provided with a mounting groove, and the other of the fixing frame and the mounting frame is mounted in the mounting groove.

3. The cutting device as described in claim 1, characterized in that, At least one of the fixing frame and the mounting frame is provided with a connecting hole, and a connector is connected to the connecting hole. The connector is used to connect the fixing frame and the mounting frame.

4. The cutting device as described in claim 3, characterized in that, At least one of the connecting holes extends along the direction of the at least other portion of the path.

5. The cutting device as described in claim 1, characterized in that, One of the mounting bracket and the transmission shaft is provided with a slide rail, and the other of the mounting bracket and the transmission shaft is provided with a slider. The slider is confined within the slide rail, and the extending direction of the slide rail is consistent with the extending direction of the at least other part of the path; or The buffer module further includes at least one first positioning sensor, which is disposed on the mounting bracket and is used to detect the position of the transmission shaft; or The buffer module further includes a first elastic element, one end of which is connected to the transmission shaft, and the other end of which is connected to the mounting bracket; or A first pneumatic connector is provided at one end of the material passage near the material passage, and / or a second pneumatic connector is provided at one end of the material passage near the material passage, the first pneumatic connector and / or the second pneumatic connector being used to provide at least a partial path for the wire between the material passage and the material passage.

6. The cutting device as claimed in claim 1, characterized in that, The cutting module includes a drive unit and a cutting blade. The drive unit is disposed on the fixed frame. The drive unit is used to position the cutting blade in a first position or a second position. When the cutting blade is in the first position, the at least part of the path is released. When the cutting blade is in the second position, the wire is disconnected.

7. The cutting device as described in claim 6, characterized in that, The cutting module further includes at least one second positioning sensor, which is disposed on the fixing frame and is used to detect the position of the cutting blade.

8. The cutting device as described in claim 6, characterized in that, The mounting bracket is provided with a guide groove, and the cutter is at least partially disposed in the guide groove.

9. The cutting device as claimed in claim 1, characterized in that, The cutting device further includes a material guide provided on the fixed frame. The material guide has at least two inlets and an outlet. The outlet is closer to the material passage space than the at least two inlets. The at least two inlets and the outlet are used to provide a path for the wire material outside the material passage space to enter the material passage space.

10. The cutting device as claimed in claim 9, characterized in that, The cutting device also includes a material breakage detection module disposed on the fixed frame. The material breakage detection module is located between the cutting module and the guide component. The material breakage detection module is used to detect the breakage of the wire.

11. A 3D printer, characterized in that, include: Organism; A print head, which is disposed on the machine body, is used to connect wire materials; The cutting device as claimed in any one of claims 1 to 10, wherein the cutting device provides at least a partial path for the filament to connect to the printhead.

12. The 3D printer as claimed in claim 11, characterized in that, The cutting device is detachably mounted on the machine body; or The 3D printer also includes a filament placement device for placing the filament, the filament placement device being disposed on the machine body, and the cutting device providing at least a partial path for the filament to be connected from the filament placement device to the print head.

13. A filament placement assembly for use in a 3D printer, the 3D printer including a print head for connecting filament, characterized in that, The wire placement assembly includes: A wire placement device, the wire placement device being used to place the wire; The cutting device as claimed in any one of claims 1 to 10, wherein the cutting device provides at least a portion of the path through which the filament is connected to the printhead by the filament placement device.

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