Extrusion device and 3D printer

Abstract

The invention relates to an extrusion device and a 3D printer. The extrusion device comprises: a support frame; the driving mechanism comprises a driving part, a transmission assembly and an output wheel, the transmission assembly is arranged at the output end of the driving part and rotatably installed on the supporting rack, and the output wheel is arranged on the transmission assembly; the extrusion wheel is rotatably arranged in the supporting rack, is meshed with the output wheel and is used for pushing or withdrawing the printing supplies; and the cutting mechanism comprises a cutting assembly movably arranged on the supporting rack and a switching part, and the switching part is in transmission fit with the output wheel, so that the cutting assembly moves to the cutting position from the initial position and cuts the printing consumables, or moves to the separation position from the initial position so as to be away from the printing consumables. Therefore, driving control is achieved through one driving component, the number of the driving components can be reduced, the overall size and weight of the extrusion device are reduced, motion control over the extrusion device is facilitated, and the printing precision is improved.

Description

Technical Field

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

[0002] FDM (Fused Deposition Modeling) 3D printers use solid filament as the printing material. The 3D printer's nozzle is used to melt and extrude the molten filament. Specifically, the filament enters the nozzle under external force, where it heats and melts inside the nozzle and is extruded from the nozzle outlet, gradually accumulating layer by layer to create a 3D model.

[0003] 3D printers use an extruder to deliver printing consumables. During printing, the extruder pushes the consumables into the nozzle. When changing consumables, the extruder needs to withdraw the consumables to facilitate the delivery of the next consumable to the nozzle. Typically, a consumable cut-off mechanism is integrated into the extruder to cut the consumables when changing, preventing them from being pulled out of the nozzle.

[0004] Current 3D printers use motors to drive the extruder to impact points outside the print area, achieving cutting during the collision. Alternatively, a motor-driven cutting blade can be used to achieve cutting. However, both methods require a separate motor, increasing costs, and also increasing the overall size and weight of the extruder, resulting in reduced printing accuracy. Summary of the Invention

[0005] Based on this, it is necessary to provide an extruder and a 3D printer to address the problems of high cost and reduced printing accuracy caused by the need to add a separate motor when cutting printing consumables in current 3D printers. The extruder can reduce the number of driving components, reduce the cost of the extruder, and reduce the overall volume and weight of the extruder, thereby facilitating the motion control of the extruder and improving printing accuracy.

[0006] An extrusion device comprising:

[0007] Support rack;

[0008] The driving mechanism includes a driving component, a transmission assembly, and an output wheel, wherein the driving component is arranged on the supporting frame, the transmission assembly is arranged at the output end of the driving component and is rotatably mounted on the supporting frame, and the output wheel is arranged on the transmission assembly;

[0009] an extrusion wheel rotatably disposed in the support frame and engaged with the output wheel for pushing or retracting printing consumables; and

[0010] The cutting mechanism includes a cutting assembly movably arranged on the support frame and a switching component. The switching component cooperates with the output wheel transmission to push the cutting assembly to move, so that the cutting assembly moves from an initial position to a cutting position and cuts the printing consumables, or moves from the initial position to a separation position to move away from the printing consumables.

[0011] In one embodiment of the present application, the cutting assembly includes a mounting seat, a cutting tool, and a toggle member, wherein the mounting seat is movably disposed on the support frame along the radial direction of the printing consumable, and the cutting tool is disposed at one end of the mounting seat facing the printing consumable and extends toward the printing consumable;

[0012] The toggle member is rotatably disposed on the support frame and can intermittently cooperate with the switching component so that the toggle member drives the mounting seat to drive the cutting tool to switch between the initial position, the separation position and the cutting position.

[0013] In one embodiment of the present application, the toggle member includes a first rotating portion, a first pushing portion, and a second pushing portion, wherein the first rotating portion is rotatably mounted on the supporting frame, and the first pushing portion and the second pushing portion are disposed on the first rotating portion;

[0014] The first pushing portion can abut against or separate from the switching component, and when the switching component abuts against the first pushing portion, it can drive the first rotating portion to rotate, thereby driving the second pushing portion to abut against or separate from the mounting seat.

[0015] In one embodiment of the present application, the switching component includes a switching wheel and a protrusion, wherein the protrusion is provided on a side of the switching wheel facing the cutting assembly and deviates from the rotation center of the switching wheel;

[0016] The protrusion can push the toggle member when the switching wheel rotates, so that the toggle member drives the mounting seat to drive the cutting tool to switch between the initial position, the separation position and the cutting position.

[0017] In one embodiment of the present application, the number of the protrusion is one, or the number of the protrusion is at least two, and the at least two protrusions are arranged at intervals along the circumference of the switching wheel;

[0018] And / or, the protrusion and the switching wheel are an integrated structure, or the protrusion and the switching wheel are arranged separately.

[0019] In one embodiment of the present application, the cutting mechanism further comprises a first elastic member, which is disposed on the support frame and connects the support frame and the mounting seat;

[0020] The elastic force of the first elastic member can enable the mounting seat to drive the cutting tool to move from the cutting position to the initial position.

[0021] In one embodiment of the present application, the cutting mechanism further includes a second elastic member, which is disposed on the supporting frame and connects the supporting frame and the toggle member;

[0022] The elastic force of the second elastic member can restore the toggle member from the separation position to the initial position.

[0023] In one embodiment of the present application, the support frame has a feed channel and a mounting groove, the feed channel is arranged corresponding to the extrusion wheel and is used to convey the printing consumables, and the mounting groove extends along the radial direction of the printing consumables and is connected to the feed channel;

[0024] The mounting seat is movably disposed in the mounting slot so that the cutting tool can be switched between the cutting position and the separation position.

[0025] In one embodiment of the present application, the mounting base includes a support shaft, a second rotating portion, and a mounting body, the support shaft is disposed on the support frame, the second rotating portion and the toggle member are rotatably disposed on the support frame, the mounting body is disposed on the second rotating portion, and is movably disposed in the mounting groove along a radial direction of the printing consumables, and the cutting tool is disposed at an end of the mounting body away from the second rotating portion;

[0026] And / or, the mounting base further includes a connecting body, the cutting assembly further includes a support member, the support member passes through the connecting body and extends radially along the printing consumables, the first elastic member of the cutting mechanism is sleeved on the support member and abuts against the support frame and the connecting body;

[0027] And / or, the support frame further has a cutting groove, the cutting groove passes through the feed channel to the mounting groove along the radial direction of the printing consumables, and the cutting tool can pass through the feed channel and extend into the cutting groove during cutting;

[0028] And / or, the outer periphery of the extrusion wheel has a conveying groove, the support frame has a feeding channel and an avoidance groove, the feeding channel is connected to the avoidance groove, the extrusion wheel is at least partially located in the avoidance groove, and the conveying groove is connected to the feeding channel to convey the printing consumables;

[0029] And / or, the transmission assembly is a gear transmission group, a belt transmission group or a worm gear transmission group;

[0030] And / or, the support frame includes a first support frame and a second support frame, the first support frame is arranged on the second support frame and enclosed to form an installation space, the transmission assembly, the output wheel, the extrusion wheel and the cutting mechanism can be movably arranged in the installation space, and the extrusion wheel cooperates with the first support frame to transport the printing consumables.

[0031] A 3D printer comprising a melting nozzle and an extrusion device according to any of the above technical features;

[0032] The melting nozzle is arranged below the extrusion device. The extrusion device can push the printing consumables into the melting nozzle. The extrusion device can also retract and cut off the printing consumables.

[0033] After adopting the above technical solution, this application has at least the following technical effects:

[0034] The extrusion device and 3D printer of the present application are characterized in that, in the extrusion device, when the driving component drives the transmission component to drive the output wheel to rotate in a first direction, the output wheel can drive the extrusion wheel to push the printing consumables, and at the same time, the output wheel can drive the switching component to move, so as to push the cutting component to move from an initial position to a separation position, so that the cutting component cannot cut the printing consumables. When the driving component drives the transmission component to drive the output wheel to rotate in a second direction, the output wheel can drive the extrusion wheel to retract the printing consumables, and at the same time, the output wheel can drive the switching component to move, so as to push the cutting component to move from an initial position to a cutting position, so that the cutting component cuts the printing consumables.

[0035] This extrusion device uses a single drive component to achieve the pushing, retraction, and cutting of printing consumables. When the drive component drives the output wheel to rotate in a first direction, the extrusion wheel pushes the printing consumables and the cutting component does not perform a cutting action. When the drive component drives the output wheel to rotate in a second direction, the extrusion wheel retracts the printing consumables, and the cutting component simultaneously cuts the printing consumables. In this way, using a single drive component to achieve drive control can reduce the number of drive components and lower the cost of the extrusion device. It can also reduce the space occupied by the drive component in the extrusion device and reduce the overall volume and weight of the extrusion device, thereby reducing the extrusion device's motion inertia, facilitating motion control of the extrusion device, and improving printing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of an extrusion device according to an embodiment of the present application from a viewing angle.

[0037] Figure 2 for Figure 1 A schematic diagram of the extrusion device shown in another perspective.

[0038] Figure 3 for Figure 1 A front view of the extrusion device is shown.

[0039] Figure 4 for Figure 1 A top view of the extrusion device is shown.

[0040] Figure 5 for Figure 4 The extrusion device is shown in a cross-sectional view along the AA direction.

[0041] Figure 6 for Figure 1 An exploded schematic diagram of the extrusion device is shown.

[0042] Figure 7 for Figure 1 The schematic diagram of the extrusion device shown is without the first support frame.

[0043] Figure 8 for Figure 7 A front view of the extrusion device is shown.

[0044] Figure 9 for Figure 7 A schematic diagram of a cutting mechanism in an extrusion device shown in one perspective.

[0045] Figure 10 for Figure 9 A schematic diagram of the cutting mechanism shown in another perspective.

[0046] Figure 11 for Figure 6 Schematic diagram of the toggle member in the extrusion device shown.

[0047] Figure 12 for Figure 6 Schematic diagram of the mounting base in the extrusion device shown.

[0048] Figure 13 for Figure 8 A schematic diagram of another embodiment of an extrusion device is shown.

[0049] Figure 14 for Figure 7 A front view of another embodiment of a switching component in an extrusion device is shown.

[0050] Figure 15 for Figure 14 A perspective view of the switching component is shown.

[0051] Figure 16 for Figure 14 A front view of another embodiment of a switching component is shown.

[0052] Figure 17 for Figure 16 A perspective view of the switching component is shown.

[0053] Figure 18 for Figure 1 A schematic diagram of the first support frame in the extrusion device is shown.

[0054] Wherein: 10, extrusion device; 100, support frame; 110, first support frame; 111, feed channel; 112, avoidance groove; 113, mounting groove; 114, cutting groove; 120, second support frame; 200, drive mechanism; 210, drive component; 220, transmission assembly; 221, drive wheel; 222, transmission wheel; 223, transmission shaft; 230, output wheel; 300, extrusion wheel; 310, conveying trough; 400, cutting mechanism; 410, cutting assembly; 4 11. Mounting seat; 4111. Mounting body; 4112. Second rotating part; 4113. Connecting body; 4114. Support shaft; 412. Cutting tool; 413. Driving member; 4131. First rotating part; 4132. First pushing part; 4133. Second pushing part; 4134. Protrusion; 414. Support member; 420. Switching member; 421. Switching wheel; 422. Protrusion; 430. First elastic member; 440. Second elastic member; 60. Printing consumables. DETAILED DESCRIPTION

[0055] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0056] In the description of this application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application.

[0057] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0058] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0059] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above," "above," and "above" the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below," "below," and "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0060] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0061] As you can understand, 3D printers use an extruder to deliver printing consumables. During printing, the extruder pushes the printing consumables into the nozzle. When changing the printing consumables, the extruder needs to withdraw the printing consumables to facilitate the delivery of the next printing consumables into the nozzle. Typically, a consumables cutting mechanism is integrated into the extruder to cut the printing consumables when changing the printing consumables, preventing the printing consumables from being pulled out of the nozzle.

[0062] Current 3D printers use motors to drive the extruder to impact points outside the print area, achieving cutting during the collision. Alternatively, a motor-driven cutting blade can be used to achieve cutting. However, both methods require a separate motor, increasing costs, and also increasing the overall size and weight of the extruder, resulting in reduced printing accuracy.

[0063] For this purpose, see Figures 1 to 5 , this application provides a new type of extrusion device 10. Figure 1 This is a schematic diagram of an extrusion device 10 according to an embodiment of the present application at a viewing angle. Figure 2 for Figure 1 The schematic diagram of the extrusion device 10 shown in another perspective, Figure 3 for Figure 1 The front view of the extrusion device 10 is shown, Figure 4 for Figure 1 The top view of the extrusion device 10 is shown, Figure 5 for Figure 4 The extrusion device 10 is shown in a cross-sectional view along the AA direction.

[0064] The extrusion device 10 is applied to a 3D printer (not shown), and the extrusion device 10 can push the printing consumables 60, retract the printing consumables 60, and cut the printing consumables 60. Specifically, the extrusion device 10 can be along Figures 1 to 3 、 Figure 5 The printing consumables 60 are pushed in the up-down direction as shown, that is, the extrusion device 10 pushes the printing consumables 60 from top to bottom. When the extrusion device 10 retracts the printing consumables 60, the printing consumables 60 move from bottom to top, that is, the extrusion device 10 retracts the printing consumables 60 from bottom to top.

[0065] Of course, in other embodiments of the present application, the extruder 10 can also be used in other wire feeding mechanisms, such as those in the spinning industry and automatic winding machines. This application only uses the extruder 10 in a 3D printer as an example for description. When describing the structure of the extruder 10, this application uses the direction of movement (up and down) of the printing consumables 60 as a reference to explain the overall structure of the extruder 10 and the layout of its components. Furthermore, when describing the structure of each component, the components are defined in terms of their circumferential and radial directions.

[0066] To better illustrate the structure of the extrusion device 10, we will first briefly describe the structure of a 3D printer. A 3D printer includes at least a melt nozzle (not shown) and the extrusion device 10 of the present application. The melt nozzle is disposed below the extrusion device 10. The extrusion device 10 is capable of pushing the printing consumable 60 into the melt nozzle. The melt nozzle transfers heat to the printing consumable 60 therein, melting the printing consumable 60 into a molten wire melt. The melt nozzle then extrude the wire melt to perform the 3D printing operation.

[0067] When a 3D printer performs multi-material or multi-color printing, it is necessary to remove the previous printing consumable 60 and push the next printing consumable 60. Since the printing consumable 60 gradually melts in the melting nozzle, the extruder 10 needs to cut the printing consumable 60 above the melting nozzle when retracting the printing consumable 60 to avoid pulling out the nearly melted printing consumable 60 in the melting nozzle. The extruder 10 then pushes the next printing consumable 60.

[0068] Alternatively, one extruder 10 may correspond to one melt nozzle, with the corresponding printing consumable 60 being extruded through the corresponding melt nozzle. Retracting and cutting the printing consumable 60 above the melt nozzle can avoid print quality issues caused by residual or clogged old consumables in the melt nozzle, ensuring that new consumables can smoothly and accurately enter the melt nozzle after material replacement.

[0069] Of course, multiple extruders 10 may correspond to one melt nozzle, with each extruder 10 delivering a different type of printing consumable 60. When the previous extruder 10 finishes delivering the corresponding printing consumable 60, the extruder 10 retracts and cuts the printing consumable 60 above the melt nozzle. Subsequently, the next extruder 10 delivers the corresponding printing consumable 60 to the melt nozzle.

[0070] The 3D printer also includes a column (not shown) and multiple connecting rods (not shown). One end of each connecting rod is rotatably connected to the column, and the other end is rotatably connected to the extruder 10. In this way, the connecting rods can drive the extruder 10 and the melting nozzle to move in the X-axis, Y-axis, and Z-axis directions, so that the extruder 10 moves along the printing trajectory. At the same time, the melting nozzle extrudes the filament melt and prints and stacks them layer by layer to construct a 3D model.

[0071] It is worth noting that the focus of this application is on the structure and working principle of the extrusion device 10. The structure, working principle of the melting nozzle and the structure and working principle of other components of the 3D printer are not the focus of this application and will not be explained later. Only the extrusion device 10 will be described.

[0072] The extrusion device 10 of the present application uses a driving component 210 to realize the pushing, retraction and cutting control of the printing consumables 60, which can reduce the number of driving components 210 and reduce the cost of the extrusion device 10. Moreover, it can also reduce the space occupied by the driving component 210 in the extrusion device 10 and reduce the overall volume and weight of the extrusion device 10, thereby reducing the motion inertia of the extrusion device 10, facilitating the motion control of the extrusion device 10, and improving printing accuracy.

[0073] In the present application, the printing consumables 60 are made of soft consumables (TPU, Thermoplastic Polyurethane), hard consumables (ABS, Acrylonitrile Butadiene Styrene; PLA, Poly Lactic Acid), and highly rigid consumables (PLA-CF, Polylactic acid-polycaprolactone-polylactic acid-I4-lactide copolymer; PETG, Polyethylene Terephthalate Glycol-modified; PC, Polycarbonate). The extrusion device 10 is capable of cutting the printing consumables 60 of soft consumables, hard consumables, and highly rigid consumables, so that the extrusion device 10 covers the cutting of commonly used types of printing consumables 60.

[0074] See Figures 1 to 6 In one embodiment, the extrusion device 10 includes a support frame 100, a drive mechanism 200, an extrusion wheel 300, and a cutting mechanism 400. The drive mechanism 200 includes a drive component 210, a transmission assembly 220, and an output wheel 230. The drive component 210 is disposed on the support frame 100, the transmission assembly 220 is disposed at the output end of the drive component 210 and is rotatably mounted on the support frame 100, and the output wheel 230 is disposed on the transmission assembly 220. The extrusion wheel 300 is rotatably disposed in the support frame 100 and engages with the output wheel 230 to push or retract the printing consumables 60.

[0075] The cutting mechanism 400 includes a cutting assembly 410 movably arranged on the support frame 100 and a switching component 420. The switching component 420 cooperates with the output wheel 230 to drive the cutting assembly 410 to move, so that the cutting assembly 410 moves from the initial position to the cutting position and cuts the printing consumables 60, or moves from the initial position to the separation position to move away from the printing consumables 60. Figure 6 for Figure 1 An exploded schematic diagram of the extrusion device 10 is shown.

[0076] The support frame 100 is the support framework of the extrusion device 10. All components of the extrusion device 10 are mounted on the support frame 100. The support frame 100 integrates the components to achieve integrated assembly of the extrusion device 10. Meanwhile, the melting nozzle is located below the support frame 100. The extrusion device 10 is connected to the connecting rod via the support frame 100, and the connecting rod drives the extrusion device 10 to move via the support frame 100.

[0077] In the drive mechanism 200, the drive component 210 is the power source of the drive mechanism 200 and also the power source of the entire extruder 10. The drive component 210 is used to push, retract, and switch the printing consumables 60. The drive component 210 is disposed on the support frame 100. The transmission assembly 220 is the power transmission component in the drive mechanism 200. The transmission assembly 220 is rotatably disposed on the support frame 100 and is disposed at the output end of the drive component 210.

[0078] The output wheel 230 is disposed on the transmission assembly 220. The output wheel 230 is the power output component of the drive mechanism 200. The transmission assembly 220 can drive the output wheel 230 to rotate, thereby enabling the output wheel 230 to cooperate with the extrusion wheel 300 and the switching component 420 in the cutting mechanism 400. The extrusion wheel 300 is the component that pushes and retracts the printing consumables 60. The extrusion wheel 300 is rotatably disposed on the support frame 100.

[0079] In the cutting mechanism 400, the switching component 420 is a transmission component between the output wheel 230 and the cutting assembly 410. The cutting assembly 410 is a component that cuts the printing consumables 60. The cutting assembly 410 is disposed in the support frame 100 so as to be movable along the radial direction of the printing consumables 60. The extrusion wheel 300 is rotatably positioned above the cutting assembly 410. The switching component 420 is movably disposed on the support frame 100 and is capable of transmitting and cooperating with the output wheel 230 and the cutting assembly 410, so that the cutting assembly 410 can cut or move away from the printing consumables 60.

[0080] It is understood that while the extrusion wheel 300 is pushing the printing consumable 60, the cutting assembly 410 is away from the printing consumable 60. That is, the cutting assembly 410 does not perform a cutting action when the extrusion wheel 300 is pushing the printing consumable 60. When the extrusion wheel 300 is retracting the printing consumable 60, the printing consumable 60 above the melting nozzle needs to be cut off. That is, the cutting assembly 410 performs a cutting action when the extrusion wheel 300 is retracting the printing consumable 60.

[0081] In the present application, the cutting assembly 410 has an initial position, a cutting position, and a separation position. In the initial position, a predetermined distance exists between the cutting assembly 410 and the extending direction of the printing consumables 60. The driving component 210 drives the output wheel 230 to rotate in a first direction, thereby driving the switching component 420 to push the cutting assembly 410 from the initial position to the separation position away from the printing consumables 60. The driving component 210 drives the output wheel 230 to rotate in a second direction, thereby driving the switching component 420 to push the cutting assembly 410 from the initial position to the cutting position and cut the printing consumables 60.

[0082] Specifically, when the extruder 10 is in a stationary state, the drive component 210 is not operating. At this time, the output wheel 230, the extruder wheel 300, and the switching component 420 all remain stationary, the cutting assembly 410 is in an initial position, and there is a certain distance between the cutting assembly 410 and the position where the extension line of the printing consumables 60 is located. Optionally, the drive component 210 is a motor, etc.

[0083] When the extrusion device 10 pushes the printing consumables 60, the drive component 210 drives the transmission assembly 220 to drive the output wheel 230 to rotate in a first direction. The output wheel 230 can then drive the extrusion wheel 300 to rotate, so that the extrusion wheel 300 pushes the printing consumables 60 from top to bottom. At the same time, the output wheel 230 and the switching component 420 are in transmission cooperation. The output wheel 230 can drive the switching component 420 to drive the cutting assembly 410 from the initial position to the separated position, so that the cutting assembly 410 does not perform the cutting action. Furthermore, when the switching component 420 is separated from the cutting assembly 410, the cutting assembly 410 can return from the separated position to the initial position, so that the cutting assembly 410 can perform the cutting action later.

[0084] When the extruder 10 retracts the printing consumables 60, the drive component 210 drives the transmission assembly 220 to rotate the output wheel 230 in the second direction. The output wheel 230 then drives the extruder wheel 300 to rotate, causing the extruder wheel 300 to retract the printing consumables 60 from the bottom to the top. Simultaneously, the output wheel 230 cooperates with the switching component 420, driving the switching component 420 to move the cutting assembly 410 from the initial position to the cutting position, whereupon the cutting assembly 410 cuts the printing consumables 60. Furthermore, when the switching component 420 separates from the cutting assembly 410, the cutting assembly 410 returns from the cutting position to the initial position.

[0085] That is, when the drive component 210 is not operating, the cutting assembly 410 is in the initial position. When the drive component 210 drives the output wheel 230 to rotate in a first direction, the output wheel 230 drives the extrusion wheel 300 to push the printing consumables 60. At the same time, the output wheel 230 drives the cutting assembly 410 from the initial position to the separated position via the switching component 420. When the drive component 210 drives the output wheel 230 to rotate in a second direction, the output wheel 230 drives the extrusion wheel 300 to retract the printing consumables 60. At the same time, the output wheel 230 drives the cutting assembly 410 from the initial position to the cutting position via the switching component 420 to cut the printing consumables 60.

[0086] Furthermore, after the cutting assembly 410 moves to the separation position or the cutting position and completes cutting, the cutting assembly 410 can also return to the initial position to facilitate the next movement to the separation position or the cutting position. For example, the first direction is clockwise and the second direction is counterclockwise. Of course, in other embodiments of the present application, the first direction can also be counterclockwise and the second direction can be clockwise.

[0087] The extrusion device 10 of the above embodiment uses a driving component 210 to realize the pushing, retraction and cutting control of the printing consumables 60, which can reduce the number of driving components 210 and reduce the cost of the extrusion device 10. Moreover, it can also reduce the space occupied by the driving component 210 in the extrusion device 10 and reduce the overall volume and weight of the extrusion device 10, thereby reducing the motion inertia of the extrusion device 10, facilitating the motion control of the extrusion device 10, and improving printing accuracy.

[0088] See Figure 6 In one embodiment, the support frame 100 includes a first support frame 110 and a second support frame 120. The first support frame 110 is disposed on the second support frame 120 and encloses an installation space (not shown). The transmission assembly 220, the output wheel 230, the extrusion wheel 300, and the cutting mechanism 400 are movably disposed in the installation space. The extrusion wheel 300 cooperates with the first support frame 110 to transport the printing consumables 60. The first support frame 110 and the second support frame 120 are the main components that support the extrusion device 10. The first support frame 110 and the second support frame 120 are disposed opposite and connected to each other. The first support frame 110 and the second support frame 120 can enclose an installation space, and the various components of the extrusion device 10 are mounted on the first support frame 110 and the second support frame 120.

[0089] exist Figure 6 In the figure, the first support frame 110 is at the bottom and the second support frame 120 is at the top. Figure 1In the figure, the left side is the first support frame 110, and the right side is the second support frame 120. The first support frame 110 and the second support frame 120 are reliably connected by fasteners such as screws and rivets, so that the first support frame 110 and the second support frame 120 form an integral support frame 100. The driving component 210 is disposed on the second support frame 120, and the output end of the driving component 210 passes through the second support frame 120 and extends into the installation space, and is connected to the transmission assembly 220.

[0090] The transmission assembly 220 and the extrusion wheel 300 are rotatably mounted on the first support frame 110 and the second support frame 120, and are rotatably located in the installation space. It should be noted that the extrusion wheel 300 and the transmission assembly 220 are rotatably mounted on the first support frame 110 and the second support frame 120 via bearings to ensure smooth rotation of the extrusion wheel 300 and the transmission assembly 220 and avoid jamming during rotation. The method of rotatably supporting the bearings will not be described below. In addition, the cutting assembly 410 is movably arranged in the installation space and is arranged corresponding to the extrusion wheel 300 so that the cutting assembly 410 can cut the printing consumables 60.

[0091] See Figure 1 、 Figure 5 and Figure 18 In one embodiment, the outer periphery of the extrusion wheel 300 has a conveying groove 310, the support frame 100 has a feed channel 111 and an avoidance groove 112, the feed channel 111 is connected to the avoidance groove 112, the extrusion wheel 300 is at least partially located in the avoidance groove 112, and the conveying groove 310 is connected to the feed channel 111 to convey the printing consumables 60. Figure 18 for Figure 1 The figure shows a schematic diagram of the first support frame 110 in the extrusion device 10. A feed channel 111 runs through the first support frame 110 from top to bottom, transporting the printing consumables 60 from top to bottom through the feed channel 111. The side of the first support frame 110 facing the extrusion wheel 300 is provided with an escape groove 112 connected to the feed channel 111. The extrusion wheel 300 is rotatably mounted between the first support frame 110 and the second support frame 120, and is partially located in the escape groove 112. The feed channel 111 is open in the middle and connected to the escape groove 112.

[0092] The outer periphery of the extrusion wheel 300 has a recessed conveying groove 310 that is in communication with the feed channel 111. The printing consumables 60 extend through the upper feed channel 111, the conveying groove 310, and the lower feed channel 111. At this point, the inner walls of the conveying groove 310 and the inner walls of the feed channel 111 can clamp the printing consumables 60. When the transmission assembly 220 drives the extrusion wheel 300 to rotate, the extrusion wheel 300 exerts a squeezing force and friction on the printing consumables 60 through the conveying groove 310, pushing the printing consumables 60 downward or upward along the feed channel 111, thereby pushing or withdrawing the printing consumables 60.

[0093] It is worth noting that the structures of the first support frame 110 and the second support frame 120 are not limited in principle, as long as the first support frame 110 and the second support frame 120 can play a supporting role and the first support frame 110 cooperates with the extrusion wheel 300 to transport the printing consumables 60.

[0094] See Figures 1 to 6 In one embodiment of the present application, the transmission assembly 220 is a gear transmission group. That is, the transmission assembly 220 drives the output wheel 230 to rotate through gear transmission. Specifically, the transmission assembly 220 includes a driving wheel 221, a transmission wheel 222, and a transmission shaft 223. The driving wheel 221 is disposed at the output end of the driving component 210. The transmission wheel 222 and the output wheel 230 are spaced apart along the axial direction of the transmission shaft 223 and are rotatably mounted on the support frame 100. The transmission wheel 222 is meshed with the driving wheel 221, and the output wheel 230 is in transmission connection with the extrusion wheel 300 and the switching component 420.

[0095] When the driving component 210 controls the driving wheel 221 to rotate, the driving wheel 221 drives the transmission wheel 222 to rotate, and the transmission wheel 222 drives the transmission shaft 223 to rotate relative to the support frame 100, so that the transmission shaft 223 drives the output wheel 230 to rotate, and then the output wheel 230 can drive the extrusion wheel 300 to rotate, so that the extrusion wheel 300 can drive the printing consumables 60 to extrude or retract. At the same time, the output wheel 230 can cooperate with the switching component 420 to drive the cutting assembly 410 to move to the separation position or the cutting position. Of course, in other embodiments of the present application, the transmission assembly 220 can also be a belt drive group, a worm gear drive group, or other structures that can drive the output wheel 230 to rotate, and this application will not repeat them.

[0096] See Figure 1 、 Figures 5 to 10In one embodiment, the cutting assembly 410 includes a mounting base 411, a cutting blade 412, and a toggle member 413. The mounting base 411 is movably mounted on the support frame 100 along the radial direction of the printing consumable 60. The cutting blade 412 is disposed at an end of the mounting base 411 facing the printing consumable 60 and extends toward the printing consumable 60. The toggle member 413 is rotatably mounted on the support frame 100 and is capable of intermittently cooperating with the switching component 420, so that the toggle member 413 drives the mounting base 411 to switch the cutting blade 412 between the initial position, the separation position, and the cutting position. Figure 7 for Figure 1 The schematic diagram of the extrusion device 10 shown in FIG. 1 is a schematic diagram of the extrusion device 10 without the first support frame 110. Figure 8 for Figure 7 The front view of the extrusion device 10 is shown, Figure 9 for Figure 7 The schematic diagram of the cutting mechanism 400 in the extrusion device 10 shown in one viewing angle is shown in FIG. Figure 10 for Figure 9 The cutting mechanism 400 is shown as a schematic diagram from another perspective.

[0097] The mounting seat 411 is a base for installing the cutting assembly 410. The mounting seat 411 is movably arranged in the first support frame 110 of the support frame 100. The cutting tool 412 is arranged at one end of the mounting seat 411 and extends toward the feed channel 111. The toggle member 413 is rotatably arranged on the first support frame 110 and the second support frame 120, and contacts the mounting seat 411. The toggle member 413 can also intermittently cooperate with the switching component 420. When the output wheel 230 drives the switching component 420 to contact the toggle member 413, the toggle member 413 can move from the initial position to the separation position, or the toggle member 413 can push the mounting seat 411 to move to the cutting position. Optionally, the cutting tool 412 is a blade or other structure capable of cutting the printing consumables 60.

[0098] It is understood that when the cutting assembly 410 is in the initial position, the toggle member 413 and the mounting base 411 are both in the initial position; when the cutting assembly 410 is in the separation position, the switching component 420 drives the toggle member 413 to move from the initial position to the separation position, separating the toggle member 413 from the mounting base 411; when the cutting assembly 410 is in the cutting position, the switching component 420 drives the toggle member 413 to push the mounting base 411 from the initial position to the cutting position, so that the cutting blade 412 cuts the printing consumables 60. The initial position, separation position, and cutting position will not be further described below.

[0099] When the output wheel 230 rotates in the first direction, it can drive the extrusion wheel 300 to rotate in the second direction, causing the extrusion wheel 300 to push the printing consumables 60. Simultaneously, the output wheel 230 can drive the switching component 420 to rotate in the second direction, thereby causing the switching component 420 to push the toggle member 413 from the initial position to the separation position, preventing the cutting tool 412 from cutting the printing consumables 60. When the output wheel 230 rotates in the second direction, it can drive the extrusion wheel 300 to rotate in the first direction, causing the extrusion wheel 300 to retract the printing consumables 60. Simultaneously, the output wheel 230 can drive the switching component 420 to rotate in the first direction, thereby causing the switching component 420 to push the toggle member 413 to move, thereby pushing the mounting seat 411 from the initial position to the cutting position, allowing the cutting tool 412 to extend into the feed channel 111 to cut the printing consumables 60.

[0100] See Figures 5 to 11 In one embodiment, the toggle member 413 includes a first rotating portion 4131, a first pushing portion 4132, and a second pushing portion 4133. The first rotating portion 4131 is rotatably mounted on the support frame 100, and the first pushing portion 4132 and the second pushing portion 4133 are disposed on the first rotating portion 4131. The first pushing portion 4132 can abut against or separate from the switching member 420. When the switching member 420 abuts against the first pushing portion 4132, it can drive the first rotating portion 4131 to rotate, thereby driving the second pushing portion 4133 to abut against or separate from the mounting base 411. Figure 11 for Figure 6 A schematic diagram of the toggle member 413 in the extrusion device 10 is shown.

[0101] The first rotating portion 4131 is a component that rotatably connects the toggle member 413 to the first support frame 110 and the second support frame 120. It will be appreciated that the cutting assembly 410 further includes a support shaft 4114, which is mounted on the first support frame 110 and the second support frame 120. The toggle member 413 is rotatably mounted on the support shaft 4114 via the first rotating portion 4131, so that the toggle member 413 can rotate relative to the first support frame 110 and the second support frame 120. The first pushing portion 4132 and the second pushing portion 4133 are disposed on the first rotating portion 4131, and the first pushing portion 4132 and the second pushing portion 4133 extend radially and are spaced apart circumferentially.

[0102] When the switching component 420 rotates, the switching component 420 can intermittently contact the first pushing portion 4132, and the second pushing portion 4133 can contact or separate from the mounting seat 411. When the switching component 420 pushes the first pushing portion 4132 in the second direction, the first pushing portion 4132 can drive the first rotating portion 4131 to rotate relative to the first support frame 110, thereby separating the second pushing portion 4133 from the mounting seat 411, so that the toggle member 413 moves to the separation position. When the switching component 420 pushes the first pushing portion 4132 in the first direction, the first pushing portion 4132 can drive the first rotating portion 4131 to rotate relative to the first support frame 110, causing the second pushing portion 4133 to contact the mounting seat 411, and the second pushing portion 4133 pushes the mounting seat 411 to move to the cutting position.

[0103] In one embodiment, the first rotating portion 4131 is a support with an axial hole, and the first rotating portion 4131 is rotatably mounted on the support shaft 4114. In one embodiment, the first pushing portion 4132 and the second pushing portion 4133 are protrusions provided on the first rotating portion 4131. Optionally, the first rotating portion 4131, the first pushing portion 4132 and the second pushing portion 4133 are an integrated structure. In this way, the structural strength of the toggle member 413 can be ensured, and at the same time, the production process can be simplified. Of course, in other embodiments of the present application, the first rotating portion 4131, the first pushing portion 4132 and the second pushing portion 4133 can also be provided separately and fixed by means of threaded connections or the like.

[0104] See Figures 5 to 10 In one embodiment, the cutting mechanism 400 further includes a first elastic member 430, which is disposed on the support frame 100 and connects the support frame 100 and the mounting base 411. The elastic force of the first elastic member 430 enables the mounting base 411 to drive the cutting tool 412 from the cutting position to the initial position. The first elastic member 430 elastically connects the first support frame 110 and the mounting base 411, and is used to maintain the mounting base 411 in the initial position. Optionally, the first elastic member 430 is a spring.

[0105] When the extrusion device 10 is not in operation, the first elastic member 430 applies an elastic force to the mounting seat 411, causing the mounting seat 411 to be in the initial position, thereby causing the cutting tool 412 to move out of the feed channel 111. While the extrusion device 10 pushes the printing consumables 60 via the extrusion wheel 300, the switching component 420 drives the toggle member 413 to move to the separation position. At this time, the cutting tool 412 will not cut the printing consumables 60. Moreover, even if the extrusion device 10 vibrates to a certain extent, the elastic force of the first elastic member 430 on the mounting seat 411 will prevent the cutting tool 412 from accidentally extending into the feed channel 111 to cut the printing consumables 60. While the extrusion device 10 is retracting the printing consumables 60 via the extrusion wheel 300, the switching component 420 pushes the toggle member 413 to move. The toggle member 413 then pushes the mounting seat 411 to overcome the elastic force of the first elastic member 430 and extend radially into the feed channel 111 along the printing consumables 60. At this point, the cutting blade 412 can cut the printing consumables 60. When the switching component 420 is disengaged from the toggle member 413, the elastic force of the first elastic member 430 pushes the mounting seat 411 from the cutting position back to the initial position.

[0106] See Figures 5 to 10 In one embodiment, the support frame 100 has a feed channel 111 and a mounting slot 113. The feed channel 111 is provided corresponding to the extrusion wheel 300 and is used to convey the printing consumables 60. The mounting slot 113 extends radially along the printing consumables 60 and is connected to the feed channel 111. The mounting seat 411 is movably disposed in the mounting slot 113 to enable the cutting tool 412 to switch between a cutting position and a separation position.

[0107] The mounting groove 113 extends radially along the printing consumables 60 and is connected to the feed channel 111. The mounting seat 411 is movably disposed in the mounting groove 113. The mounting groove 113 can guide the movement of the mounting seat 411, ensuring that the movement trajectory of the mounting seat 411 between the cutting position and the initial position is accurate. After the toggle member 413 pushes the mounting seat 411 to overcome the elastic force of the first elastic member 430, the mounting seat 411 can move along the mounting groove 113, so that the mounting seat 411 accurately drives the cutting tool 412 to extend into the feed channel 111 to cut the printing consumables 60. After cutting is completed, the elastic force of the first elastic member 430 can push the mounting seat 411 to drive the cutting tool 412 to accurately move out of the feed channel 111.

[0108] See Figure 5 In one embodiment, the support frame 100 further has a cutting groove 114, which extends along the radial direction of the printing consumables 60 through the feed channel 111 to the mounting groove 113, and the cutting tool 412 can penetrate the feed channel 111 into the cutting groove 114 during cutting. Figure 5In the figure, the left side of the feed channel 111 is a mounting groove 113, and the right side of the feed channel 111 is a cutting groove 114. The cutting groove 114, the feed channel 111, and the mounting groove 113 are connected. When the cutting tool 412 cuts the printing consumables 60, the cutting tool 412 can extend into the feed channel 111 to cut the printing consumables 60, and then extend into the cutting groove 114 after the printing consumables 60 are cut. Thus, after the cutting groove 114 is provided, it can provide space for the cutting tool 412 to cut, ensuring that the cutting tool 412 can cut the printing consumables 60 and preventing the printing consumables 60 from being left uncut.

[0109] See Figures 5 to 10 、 Figure 12 In one embodiment, the mounting seat 411 includes a support shaft 4114, a second rotating portion 4112 and a mounting body 4111, the support shaft 4114 is arranged on the supporting frame 100, the second rotating portion 4112 and the toggle member 413 are rotatably arranged on the supporting frame 100, the mounting body 4111 is arranged on the second rotating portion 4112, and is movably arranged in the mounting groove 113 along the radial direction of the printing consumables 60, and the cutting tool 412 is arranged at one end of the mounting body 4111 away from the second rotating portion 4112. Figure 12 for Figure 6 A schematic diagram of the mounting base 411 in the extrusion device 10 is shown.

[0110] The second rotating portion 4112 is coaxially arranged with the first rotating portion 4131 of the toggle member 413 and is supported and mounted to the first support frame 110 and the second support frame 120 via a support shaft 4114. The second rotating portion 4112 and the toggle member 413 are rotatably mounted to the support shaft 4114. The mounting body 4111 is the main component of the mounting base 411. The mounting body 4111 is disposed on the second rotating portion 4112 and extends radially along the printing consumables 60. The mounting body 4111 is located in the mounting groove 113. The cutting tool 412 is mounted on the end of the mounting body 4111 away from the second rotating portion 4112. The first elastic member 430 elastically connects the first support frame 110 and the mounting body 4111.

[0111] When the toggle member 413 pushes the mounting base 411 from the initial position to the cutting position, the second pushing portion 4133 pushes the mounting body 4111, thereby driving the second rotating portion 4112 to rotate relative to the support shaft 4114. Guided by the mounting slot 113, the mounting body 4111 drives the cutting tool 412 toward the printing consumables 60, thereby causing the cutting tool 412 to extend into the feed channel 111 and cut the printing consumables 60. After cutting is completed, the first elastic member 430 pushes the mounting body 4111 along the mounting slot 113 from the cutting position back to the initial position.

[0112] See Figure 9 、 Figure 10 and Figure 12 In one embodiment, the mounting base 411 further includes a connecting body 4113, and the cutting assembly 410 further includes a support member 414. The support member 414 penetrates the connecting body 4113 and extends radially along the printing consumable 60. The first elastic member 430 of the cutting mechanism 400 is sleeved on the support member 414 and abuts against the support frame 100 and the connecting body 4113. The connecting body 4113 is provided on the side of the mounting body 4111, and a fastener extends through the connecting body 4113. The first elastic member 430 is sleeved on the support member 414. The arrangement of the connecting body 4113 and the support member 414 facilitates the installation of the first elastic member 430, thereby enabling the first elastic member 430 to elastically connect the first support frame 110 and the mounting base 411.

[0113] In one embodiment, the second rotating portion 4112, the mounting body 4111, and the connecting body 4113 are integrally formed. This ensures the structural strength of the mounting base 411 and simplifies the production and assembly process. Of course, in other embodiments of the present application, the second rotating portion 4112, the mounting body 4111, and the connecting body 4113 may also be separate components connected by screws or the like.

[0114] See Figure 2 and Figure 6 In one embodiment, the cutting mechanism 400 further includes a second elastic member 440, which is disposed on the support frame 100 and connects the support frame 100 and the toggle member 413. The elastic force of the second elastic member 440 can restore the toggle member 413 from the separated position to the initial position. The second elastic member 440 is a component that maintains the toggle member 413 in the initial position and elastically connects the support shaft 4114 and the toggle member 413.

[0115] When the extrusion device 10 is not working, the second elastic member 440 applies an elastic force to the toggle member 413, so that the toggle member 413 is in the initial position, and the toggle member 413 will not push the mounting seat 411 to move toward the feed channel 111. While the extrusion device 10 pushes the printing consumables 60 through the extrusion wheel 300, the switching component 420 drives the toggle member 413 to overcome the elastic force of the second elastic member 440 and move from the initial position to the separation position. When the switching component 420 is separated from the toggle member 413, the elastic force of the second elastic member 440 can push the toggle member 413 from the separation position back to the initial position. While the extrusion device 10 retracts the printing consumables 60 through the extrusion wheel 300, the switching component 420 drives the toggle member 413 to overcome the elastic force of the second elastic member 440 and push the mounting seat 411 from the initial position to the cutting position.

[0116] In this embodiment, the second elastic member 440 is a torsion spring. The torsion spring is fixed to the support shaft 4114, and one arm of the torsion spring is connected to the toggle member 413. When the switching member 420 drives the toggle member 413 to the disengaged position, the toggle member 413 rotates relative to the support shaft 4114, overcoming the elastic force of the torsion spring. When the switching member 420 disengages the toggle member 413, the elastic force exerted by the torsion spring on the toggle member 413 drives the toggle member 413 back to its initial position. Of course, in other embodiments of the present application, the second elastic member 440 may also be a coil spring.

[0117] See Figure 9 and Figure 10 In one embodiment, the toggle member 413 includes a protrusion 4134 that protrudes from the second rotating portion 4112. The second elastic member 440 is disposed on the support shaft 4114, and one end of the second elastic member 440 is connected to the protrusion 4134. In this way, the second elastic member 440 can apply force to the toggle member 413 through the protrusion 4134, causing the toggle member 413 to return to its initial position.

[0118] See Figures 5 to 11 In one embodiment, the switching member 420 includes a switching wheel 421 and a protrusion 422. The protrusion 422 is disposed on the side of the switching wheel 421 facing the cutting assembly 410 and offset from the rotation center of the switching wheel 421. When the switching wheel 421 rotates, the protrusion 422 can push the toggle member 413, so that the toggle member 413 drives the mounting base 411 to drive the cutting tool 412 to switch between the initial position, the separation position, and the cutting position.

[0119] The switching wheel 421 is rotatably mounted between the first support frame 110 and the second support frame 120. A protrusion 422 is offset from the center of rotation of the switching wheel 421 and protrudes toward the direction of the toggle member 413. The switching member 420 intermittently engages with the toggle member 413 via the protrusion 422. The switching wheel 421 is capable of meshing with the output wheel 230. When the output wheel 230 rotates in a first direction, it drives the extruder wheel 300 to push the printing consumables 60. Simultaneously, the output wheel 230 drives the switching wheel 421 to rotate in a second direction. When the protrusion 422 of the switching wheel 421 contacts the first pusher 4132 of the toggle member 413, the protrusion 422 pushes the toggle member 413 toward the disengaged position, overcoming the elastic force of the second elastic member 440. After the protrusion 422 clears the toggle member 413, the elastic force of the second elastic member 440 pushes the toggle member 413 back to its initial position. This continuous reciprocating process achieves continuous transportation of the printing consumables 60.

[0120] When the output wheel 230 rotates in the second direction, it drives the extruder wheel 300 to retract the printing consumables 60. Simultaneously, the output wheel 230 drives the switching wheel 421 to rotate in the first direction. When the protrusion 422 of the switching wheel 421 contacts the first push portion 4132 of the toggle member 413, the protrusion 422 pushes the toggle member 413 toward the mounting seat 411. The mounting seat 411 then overcomes the elastic force of the first elastic member 430 and drives the cutting tool 412 to the cutting position. At this point, the cutting tool 412 extends into the feed channel 111 to cut the printing consumables 60. After the protrusion 422 passes over the toggle member 413, the elastic force of the first elastic member 430 pushes the mounting seat 411, driving the toggle member 413 back to its initial position, completing the cutting of the printing consumables 60.

[0121] See Figures 5 to 10 In one embodiment of the present application, there is only one protrusion 422. Thus, when retracting the printing consumable 60, the switching wheel 421 drives the protrusion 422 to rotate to a position where it contacts the toggle member 413, thereby pushing the mounting base 411 to the cutting position, thereby causing the cutting blade 412 to cut the printing consumable 60.

[0122] Of course, in other embodiments of the present application, the number of protrusions 422 is at least two, and at least two protrusions 422 are spaced apart along the circumference of the switching wheel 421. It is understood that when the printing consumable 60 is withdrawn, there may be situations where the protrusion 422 just passes over the toggle member 413 (i.e., the protrusion 422 is at a certain position), which will cause the printing consumable 60 to be withdrawn too long. To this end, the present application increases the number of protrusions 422 on the side of the switching wheel 421. When one protrusion 422 just passes over the toggle member 413, the next protrusion 422 can also approach the toggle member 413, achieving cutting after the printing consumable 60 is withdrawn.

[0123] For example, Figure 13 As shown, Figure 13 for Figure 8 The schematic diagram of another embodiment of the extrusion device 10 is shown. Figure 13 In the embodiment, four protrusions 422 are provided on the switching wheel 421. This allows the printing consumables 60 to be cut within a predetermined retraction size (e.g., 3 mm), meeting practical application requirements. Of course, in other embodiments of the present application, the number of protrusions 422 may also be three or any other number.

[0124] See Figures 5 to 10 In one embodiment, the protrusion 422 is cylindrical. The protrusion 422 can contact the first push portion 4132 of the toggle member 413. Of course, in other embodiments of the present application, the protrusion 422 can also have other shapes as long as it can cooperate with the first push portion 4132.

[0125] See Figures 14 to 17 , Figure 14 for Figure 7 A front view of another embodiment of the switching component 420 in the extrusion device 10 is shown. Figure 15 for Figure 14 The switching component 420 is shown in a perspective view. Figure 16 for Figure 14 The front view of another embodiment of the switching component 420 is shown. Figure 17 for Figure 16 The switching component 420 is shown in FIG. Figure 14 and Figure 15 In the embodiment, the number of the protrusion 422 is one and it is arranged in a cam shape. Figure 16 and Figure 17 In the embodiment, the number of the protrusions 422 is multiple.

[0126] In one embodiment, the protrusion 422 and the switching wheel 421 are integrally formed. This ensures the structural strength of the switching component 420 and simplifies the assembly process of the switching component 420. Of course, in other embodiments of the present application, the protrusion 422 and the switching wheel 421 are provided as separate bodies and connected by screws or the like.

[0127] by Figure 5 The orientation shown illustrates the working process of the extrusion device 10: when the extrusion device 10 pushes the printing consumables 60, the driving component 210 drives the transmission assembly 220 (the driving wheel 221 cooperates with the transmission wheel 222) to drive the output wheel 230 to rotate in a first direction (clockwise), and then the output wheel 230 drives the extrusion wheel 300 to rotate in a second direction (counterclockwise), and the extrusion wheel 300 cooperates with the inner wall of the feed channel 111 to push the printing consumables 60 from top to bottom, thereby pushing the printing consumables 60.

[0128] As the output wheel 230 rotates in the first direction, it drives the switching wheel 421 to rotate in the second direction, which in turn drives the protrusion 422 to rotate in the second direction. When the protrusion 422 contacts the first pusher 4132 of the toggle member 413, it pushes the first pusher 4132 to the right (in the second direction), causing the toggle member 413 to move from its initial position to its disengaged position, overcoming the elastic force of the second elastic member 440. When the protrusion 422 disengages from the first pusher 4132 of the toggle member 413, the elastic force of the second elastic member 440 pushes the toggle member 413 back to its initial position. This reciprocating motion continuously achieves the desired delivery of the printing consumables 60.

[0129] When the extrusion device 10 retracts the printing consumables 60, the driving component 210 drives the transmission assembly 220 (the driving wheel 221 and the transmission wheel 222 cooperate) to drive the output wheel 230 to rotate in the second direction (counterclockwise), and then the output wheel 230 drives the extrusion wheel 300 to rotate in the first direction (clockwise). The extrusion wheel 300 cooperates with the inner wall of the feed channel 111 to push the printing consumables 60 from bottom to top, thereby realizing the retraction of the printing consumables 60.

[0130] While the output wheel 230 rotates in the second direction, the output wheel 230 drives the switching wheel 421 to rotate in the first direction, which in turn drives the protrusion 422 to rotate in the first direction. When the protrusion 422 contacts the first pushing portion 4132 of the toggle member 413, the protrusion 422 can toggle the first pushing portion 4132 to the left (in the first direction), causing the toggle member 413 to push the mounting seat 411, causing the mounting seat 411 to overcome the elastic force of the first elastic member 430 and move from the initial position to the cutting position. At this point, the cutting tool 412 can extend into the feed channel 111 and cut the printing consumables 60. When the protrusion 422 disengages from the first pushing portion 4132 of the toggle member 413, the elastic force of the first elastic member 430 pushes the mounting seat 411 back to the initial position, completing the withdrawal and cutting of the printing consumables 60.

[0131] The extrusion device 10 of the present application, through the output wheel 230, can also drive the switching wheel 421 to rotate while driving the extrusion wheel 300. The design of the second elastic member 440 ensures that the mounting seat 411 and the toggle member 413 remain in their initial positions during the stage of pushing the printing consumable 60. The design of the first elastic member 430 ensures that the mounting seat 411 and the toggle member 413 return to their initial positions during the stage of withdrawing the printing consumable 60. In this way, the extrusion device 10 can achieve the pushing, withdrawing, and cutting of the printing consumable 60 using a single driving component 210, without the need for an externally powered consumable cutting mechanism.

[0132] At the same time, by providing a protrusion 422 on the switching wheel 421, the switching component 420 forms a cam structure. When the switching wheel 421, the protrusion 422, and the toggle member 413 cooperate, they can push the mounting seat 411 to move radially along the printing consumable 60, thereby converting rotational motion into linear motion, thereby ensuring the realization of the function. In addition, the cooperation between the toggle member 413 and the second elastic member 440 prevents the cutting assembly 410 from performing the cutting operation when the printing consumable 60 is pushed. The toggle member 413 is reset by the second elastic member 440, and the cutting assembly 410 is reset by the first elastic member 430, ensuring that the cutting assembly 410 only cuts when withdrawing, and does not cut when pushing.

[0133] The extrusion device 10 of the present application adopts a driving component 210 to realize driving control, which can reduce the number of driving components 210 and reduce the cost of the extrusion device 10. Moreover, it can also reduce the space occupied by the driving component 210 in the extrusion device 10 and reduce the overall volume and weight of the extrusion device 10, thereby reducing the motion inertia of the extrusion device 10, facilitating the motion control of the extrusion device 10, and improving printing accuracy.

[0134] At the same time, the design of the second elastic member 440 ensures that the switching member 420 remains in its initial position during the pushing phase of the printing consumable 60, and the design of the first elastic member 430 ensures that the cutting assembly 410 returns to its initial position during the retraction phase of the printing consumable 60. In this way, the pushing, retraction, and cutting of the printing consumable 60 are achieved without the need for an additional drive member 210 or separate operations.

[0135] The present application also provides a 3D printer, comprising a melt nozzle and an extruder 10 as in any of the above-described embodiments. The melt nozzle is disposed below the extruder 10, and the extruder 10 is capable of pushing a printing consumable 60 into the melt nozzle. The extruder 10 is also capable of withdrawing and cutting the printing consumable 60. The 3D printer of the present application, employing the extruder 10 of the above-described embodiment, achieves the pushing, withdrawing, and cutting of the printing consumable 60 without adding an additional drive component 210 or performing separate operations.

[0136] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0137] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An extrusion device, characterized in that: include: Support rack (100); A driving mechanism (200) comprising a driving component (210), a transmission assembly (220), and an output wheel (230), wherein the driving component (210) is disposed on the supporting frame (100), the transmission assembly (220) is disposed at an output end of the driving component (210) and is rotatably mounted on the supporting frame (100), and the output wheel (230) is disposed on the transmission assembly (220); an extrusion wheel (300) rotatably disposed in the support frame (100) and engaged with the output wheel (230) for pushing or retracting the printing consumables (60); and The cutting mechanism (400) comprises a cutting assembly (410) movably arranged on the support frame (100) and a switching component (420), wherein the switching component (420) cooperates with the output wheel (230) to drive the cutting assembly (410) to move, so that the cutting assembly (410) moves from an initial position to a cutting position and cuts the printing consumables (60), or moves from the initial position to a separation position to move away from the printing consumables (60).

2. The extrusion device according to claim 1, characterized in that The cutting assembly (410) comprises a mounting seat (411), a cutting tool (412), and a toggle member (413); the mounting seat (411) is movably arranged on the support frame (100) along the radial direction of the printing consumable (60); the cutting tool (412) is arranged at one end of the mounting seat (411) facing the printing consumable (60) and extends toward the printing consumable (60); The toggle member (413) is rotatably arranged on the support frame (100) and can intermittently cooperate with the switching component (420) so that the toggle member (413) drives the mounting seat (411) to drive the cutting tool (412) to switch between the initial position, the separation position and the cutting position.

3. The extrusion device according to claim 2, characterized in that The toggle member (413) comprises a first rotating portion (4131), a first pushing portion (4132) and a second pushing portion (4133); the first rotating portion (4131) is rotatably mounted on the support frame (100); the first pushing portion (4132) and the second pushing portion (4133) are arranged on the first rotating portion (4131); The first pushing portion (4132) can abut against or separate from the switching component (420), and when the switching component (420) abuts against the first pushing portion (4132), it can drive the first rotating portion (4131) to rotate, thereby driving the second pushing portion (4133) to abut against or separate from the mounting seat (411).

4. The extrusion device according to claim 2, characterized in that The switching component (420) comprises a switching wheel (421) and a protruding portion (422), wherein the protruding portion (422) is arranged on a side of the switching wheel (421) facing the cutting assembly (410) and deviates from the rotation center of the switching wheel (421); The protrusion (422) is capable of pushing the toggle member (413) when rotating with the switching wheel (421), so that the toggle member (413) drives the mounting seat (411) to drive the cutting tool (412) to switch between the initial position, the separation position, and the cutting position.

5. The extrusion device according to claim 4, characterized in that The number of the protrusion (422) is one, or the number of the protrusion (422) is at least two, and the at least two protrusions (422) are arranged at intervals along the circumference of the switching wheel (421); And / or, the protruding portion (422) and the switching wheel (421) are an integral structure, or the protruding portion (422) and the switching wheel (421) are separately provided.

6. The extrusion device according to claim 2, characterized in that The cutting mechanism (400) further comprises a first elastic member (430), wherein the first elastic member (430) is arranged on the supporting frame (100) and connects the supporting frame (100) and the mounting seat (411); The elastic force of the first elastic member (430) enables the mounting seat (411) to drive the cutting tool (412) to move from the cutting position to the initial position.

7. The extrusion device according to claim 2, characterized in that The cutting mechanism (400) further comprises a second elastic member (440), wherein the second elastic member (440) is arranged on the supporting frame (100) and connects the supporting frame (100) and the toggle member (413); The elastic force of the second elastic member (440) can restore the toggle member (413) from the separation position to the initial position.

8. The extrusion device according to any one of claims 2 to 7, characterized in that The support frame (100) has a feed channel (111) and a mounting groove (113), wherein the feed channel (111) is provided corresponding to the extrusion wheel (300) and is used to convey the printing consumables (60), and the mounting groove (113) extends along the radial direction of the printing consumables (60) and is connected to the feed channel (111); The mounting seat (411) is movably arranged in the mounting slot (113) so that the cutting tool (412) can be switched between the cutting position and the separation position.

9. The extrusion device according to claim 8, characterized in that The mounting seat (411) comprises a support shaft (4114), a second rotating portion (4112) and a mounting body (4111), wherein the support shaft (4114) is arranged on the supporting frame (100), the second rotating portion (4112) and the toggle member (413) are rotatably arranged on the supporting frame (100), the mounting body (4111) is arranged on the second rotating portion (4112) and is movably arranged in the mounting groove (113) along the radial direction of the printing consumables (60), and the cutting tool (412) is arranged on an end of the mounting body (4111) away from the second rotating portion (4112); And / or, the mounting seat (411) further includes a connecting body (4113), the cutting assembly (410) further includes a support member (414), the support member (414) passes through the connecting body (4113) and extends radially along the printing consumables (60), and the first elastic member (430) of the cutting mechanism (400) is sleeved on the support member (414) and abuts against the support frame (100) and the connecting body (4113); And / or, the support frame (100) further comprises a cutting groove (114), wherein the cutting groove (114) extends through the feed channel (111) along the radial direction of the printing consumable (60) to the mounting groove (113), and the cutting tool (412) can pass through the feed channel (111) and extend into the cutting groove (114) during cutting; And / or, the outer periphery of the extrusion wheel (300) has a conveying groove (310), the support frame (100) has a feeding channel (111) and an avoidance groove (112), the feeding channel (111) is connected to the avoidance groove (112), the extrusion wheel (300) is at least partially located in the avoidance groove (112), and the conveying groove (310) is connected to the feeding channel (111) to convey the printing consumables (60); And / or, the transmission assembly (220) is a gear transmission assembly, a belt transmission assembly, or a worm gear transmission assembly; And / or, the support frame (100) includes a first support frame (110) and a second support frame (120), the first support frame (110) is arranged on the second support frame (120) and is surrounded by an installation space, the transmission assembly (220), the output wheel (230), the extrusion wheel (300) and the cutting mechanism (400) are movably arranged in the installation space, and the extrusion wheel (300) cooperates with the first support frame (110) to transport the printing consumables (60).

10. A 3D printer, characterized in that: comprising a melting nozzle and an extrusion device (10) according to any one of claims 1 to 9; The melting nozzle is arranged below the extrusion device (10), and the extrusion device (10) can push the printing consumables (60) into the melting nozzle. The extrusion device (10) can also retract and cut off the printing consumables (60).

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