Multi-consumable extrusion device, printing head and 3D printing equipment

Abstract

The utility model provides a multi-consumable extrusion device, a printing head and 3D printing equipment. The multi-consumable extrusion device comprises a mounting frame, an extrusion driving wheel, a plurality of extrusion assemblies and a switching piece; the extrusion driving wheel is rotatably arranged on the mounting frame; the multiple extrusion assemblies are sequentially arranged in the first direction and are movably arranged on the mounting frame between a first position and a second position in the second direction, and each extrusion assembly comprises an extrusion driven wheel; the switching piece is arranged on the first side of the extrusion assemblies and is configured to move relative to the multiple extrusion assemblies, so that at least one extrusion assembly is located at the first position, and the other extrusion assemblies are located at the second position; the extrusion driven wheel of the extrusion assembly located at the first position is arranged close to the extrusion driving wheel, so that an extrusion channel is formed in the third direction; and the extrusion driven wheel of the extrusion assembly located at the second position is far away from the extrusion driving wheel.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a multi-consumable material extrusion device, a print head and a 3D printing device. Background Art

[0002] Traditional two-color FDM (Fused Deposition Modeling) 3D printers are equipped with a consumable switching mechanism, which drives the driven extruder wheel to move closer to or away from the active extruder wheel to switch between two different consumable extrusion channels. At present, two-color printing can no longer meet the needs of current consumers, and multi-color printing technology has begun to emerge, resulting in the need for 3D printers to be equipped with multiple consumable switching mechanisms to switch between multiple consumable extrusion channels, resulting in a larger print head for the 3D printer, which not only increases the space occupied by the print head, but also affects the movement accuracy of the print head. Utility Model Content

[0003] The present application provides a multi-consumable material extrusion device, a print head and a 3D printing device to solve the problem that the print head of a multi-color 3D printer in the known technology is large in size and has low movement accuracy.

[0004] In a first aspect, the present application provides a multi-consumable extrusion device, which includes a mounting frame, an extrusion driving wheel, a plurality of extrusion components, and a switching member; the extrusion driving wheel is rotatably disposed on the mounting frame; the plurality of extrusion components are sequentially arranged along a first direction, and are movably arranged on the mounting frame between a first position and a second position along a second direction, each of the extrusion components includes an extrusion driven wheel, and the second direction is arranged to intersect with the first direction; the switching member is arranged on a first side of the extrusion component, and the switching member is configured to be movable relative to the plurality of extrusion components so that at least one extrusion component is located at the first position and the other extrusion components are located at the second position; wherein, for the extrusion component located at the first position, the extrusion driven wheel is arranged close to the extrusion driving wheel to form an extrusion channel in a third direction; for the extrusion component located at the second position, the extrusion driven wheel is arranged away from the extrusion driving wheel, and the third direction is arranged to intersect with the first direction and the second direction.

[0005] In a possible implementation manner, the switching member is provided with a supporting surface near the first side, and the supporting surface is configured to support at least one of the extrusion components so that the extrusion driven wheel thereof is away from the extrusion driving wheel;

[0006] The abutting surface is provided with a groove portion, and the groove portion is configured to partially accommodate the extrusion component to allow the extrusion component to approach the extrusion driving wheel.

[0007] In a possible implementation manner, each of the extrusion assemblies is provided with a supporting member, and at least a portion of the supporting member can be received in the groove portion, and the supporting members of the plurality of extrusion assemblies are located on a rotation path of the groove portion.

[0008] In one possible embodiment, the number of the groove portions is less than the number of the abutting members, and the extrusion assembly is configured such that each of the abutting members is located on the rotation path of at least one of the groove portions in the switching member, and at the same time, only one of the abutting members is located in the groove portion.

[0009] In a possible implementation manner, the extrusion assembly further includes a sliding member, and the extrusion driven wheel is rotatably disposed on the sliding member;

[0010] The sliding member is movably disposed on the mounting frame along the second direction to drive the extrusion driven wheel to approach or move away from the extrusion driving wheel.

[0011] In a possible implementation manner, along the first direction, a through hole and a mounting groove are provided on one side of the sliding member, the mounting groove and the through hole are spaced apart, the extrusion driving wheel is passed through the through hole and rotatably mounted in the mounting groove;

[0012] The inner peripheral wall of the installation groove is provided with a connection port, and the connection port is connected to the through hole to allow a part of the extrusion driven wheel to pass through the connection port.

[0013] In a possible implementation, the multi-consumable material extrusion device further includes an elastic member, wherein the elastic member is located on a second side of the extrusion assembly, and the first side and the second side are opposite sides of the extrusion assembly;

[0014] The elastic member is elastically connected between the sliding member and the mounting frame to provide an elastic force for making the sliding member close to the extrusion driving wheel.

[0015] In a possible implementation, the multi-consumable material extrusion device further includes a first driving member, which is transmission-connected to the switching member to drive the switching member to rotate.

[0016] In a possible implementation, the multi-consumable material extrusion device further includes a second driving member, the second driving member is mounted on the mounting frame, and the second driving member is drivingly connected to the extrusion driving wheel to drive the extrusion driving wheel to rotate.

[0017] In a second aspect, an embodiment of the present application further provides a print head, comprising a nozzle device and the above-mentioned multi-consumable material extrusion device, wherein the nozzle device is connected to the multi-consumable material extrusion device and is used to guide the consumables extruded by the multi-consumable material extrusion device to a molding substrate.

[0018] In a third aspect, an embodiment of the present application further provides a 3D printing device, comprising the above-mentioned multi-consumable material extrusion device or the above-mentioned print head.

[0019] The multi-consumable extrusion device of the present application is arranged in sequence along the first direction, and along the second direction, each extrusion component can be close to or away from the extrusion driving wheel, and the extrusion component can form an extrusion channel for the consumables after approaching the extrusion driving wheel, thereby realizing the extrusion of multi-color consumables. At the same time, the arrangement direction of the extrusion component and the movement direction of the extrusion component are staggered, which can make use of the plane space to a large extent, and this staggered arrangement makes the area occupied by the entire multi-consumable extrusion device in the plane space smaller, reducing the volume of the multi-consumable extrusion device. In addition, the present application is only provided with a single switching member, and the single switching member is used in conjunction with each extrusion component, which can allow at least one extrusion component to form an extrusion channel after approaching the extrusion driving wheel, and hold other extrusion components away from the extrusion driving wheel, thereby realizing the formation of extrusion channels for consumables of different colors, so as to extrude consumables of the required color. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a multi-consumable material extrusion device in one embodiment of the present application.

[0021] Figure 2 for Figure 1 An exploded schematic diagram of a multi-consumable extrusion device in one embodiment.

[0022] Figure 3 for Figure 1 An exploded schematic diagram of a partial structure of a multi-consumable extrusion device in one embodiment.

[0023] Figure 4 for Figure 1 An exploded schematic diagram of an extrusion component of a multi-consumable extrusion device in one embodiment.

[0024] Figure 5 for Figure 1 Schematic diagram of the positions of the switching member and the supporting member in the multi-consumable material extrusion device in one embodiment.

[0025] Figure 6 for Figure 1 Schematic diagram of the distribution of the supporting parts of the multi-consumable material extrusion device in one embodiment.

[0026] Figure 7 FIG. 1 is a schematic diagram of the structure of a print head of the present application in one embodiment.

[0027] Figure 8 This is a schematic diagram of the structure of a 3D printing device in one embodiment of the present application.

[0028] Description of main component symbols:

[0029] 3D printing equipment 300

[0030] Print head 200

[0031] Sprinkler device 210

[0032] Feeding channel 211

[0033] Molding base plate 220

[0034] Support frame 230

[0035] Multi-consumable extrusion device 100

[0036] First direction X

[0037] Second direction Y

[0038] The third direction Z

[0039] First side W1

[0040] Second side W2

[0041] Rotation axis H

[0042] First inner wall P1

[0043] Top wall P2

[0044] Bottom wall P3

[0045] Second inner wall P4

[0046] Mounting frame 10

[0047] Storage tank 11

[0048] First opening 12

[0049] Guide groove 13

[0050] Second opening 14

[0051] The third opening 15

[0052] Connection slot 16

[0053] Through hole 17

[0054] Extrusion driving wheel 20

[0055] Extrusion assembly 30

[0056] Sliding member 31

[0057] Sliding protrusion 311

[0058] Feed hole 312

[0059] Discharge hole 313

[0060] Mounting slot 314

[0061] Rotating column 3141

[0062] Connection port 3142

[0063] Perforation 315

[0064] Mounting hole 316 Extrusion driven wheel 32

[0065] Elastic member 33

[0066] Abutment 34

[0067] The first abutting portion 341

[0068] The second abutting portion 342

[0069] Switching element 40

[0070] Groove portion 41

[0071] First groove 411

[0072] Second groove 412

[0073] Extrusion channel 50

[0074] Protection frame 60

[0075] The first driving member 70

[0076] The second driving member 80

[0077] Adapter 90

[0078] Feed channel 91

[0079] Control port 92

[0080] Control valve 93

[0081] Cutting parts 94

[0082] Baffle 95

[0083] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0084] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0085] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0086] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0087] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0088] like Figure 1 to Figure 2 As shown, this embodiment provides a multi-consumable material extrusion device 100. The multi-consumable material extrusion device 100 includes a mounting frame 10, an extrusion driving wheel 20, a plurality of extrusion components 30, and a switching member 40.

[0089] For the convenience of subsequent reading, the present application introduces a first direction X, a second direction Y, and a third direction Z to describe the embodiments of the present application. The first direction X, the second direction Y, and the third direction Z may be three non-parallel linear directions in space; further, the first direction X, the second direction Y, and the third direction Z may be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In the subsequent embodiments, the first direction X is the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Y is the Y-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Z is the Z-axis direction of the coordinate axis of the three-dimensional coordinate system.

[0090] The extrusion driving wheel 20 is rotatably disposed on the mounting frame 10. A plurality of extrusion assemblies 30 are sequentially disposed along a first direction X, and each of the plurality of extrusion assemblies 30 includes an extrusion driven wheel 32. A plurality of extrusion assemblies 30 are movably disposed on the mounting frame 10 between a first position and a second position along a second direction Y. The first position and the second position are two positions spaced apart on the moving path of the extrusion assembly 30, and their specific positions relative to the mounting frame 10 can be adaptively designed according to actual design requirements. The first position and the second position are introduced in this application only to indicate that the extrusion assembly 30 can move back and forth between the first position and the second position relative to the mounting frame 10.

[0091] The switching member 40 is disposed on the first side W1 of the extrusion assembly 30 , and is configured to be movable relative to the plurality of extrusion assemblies 30 , so that at least one extrusion assembly 30 is located at the first position and the other extrusion assemblies 30 are located at the second position.

[0092] The extrusion driven wheel 32 of the extrusion assembly 30 located at the first position is arranged close to the extrusion driving wheel 20 to form an extrusion channel 50 in the third direction Z. The extrusion driven wheel 32 of the extrusion assembly 30 located at the second position is arranged away from the extrusion driving wheel 20 so that no extrusion channel 50 is formed between the extrusion driving wheel 20 and the extrusion driven wheel 32.

[0093] In this way, the multi-consumable extrusion device 100 of the present application, by sequentially arranging multiple extrusion components 30 along the first direction X, and along the second direction Y, each extrusion component 30 can be close to or away from the extrusion driving wheel 20, and the extrusion component 30 can form an extrusion channel 50 of the consumables after approaching the extrusion driving wheel 20, thereby realizing the extrusion of multi-color consumables. At the same time, the arrangement direction of the extrusion component 30 and the moving direction of the extrusion component 30 are staggered, which can make use of the plane space to a large extent, and this staggered arrangement makes the area occupied by the entire multi-consumable extrusion device 100 in the plane space smaller, reducing the volume of the multi-consumable extrusion device 100. In addition, the present application is only provided with a single switching member 40, and the single switching member 40 is used in conjunction with each extrusion component 30, which can allow at least one extrusion component 30 to form an extrusion channel 50 after approaching the extrusion driving wheel 20, and hold the remaining extrusion components 30 away from the extrusion driving wheel 20, thereby realizing the formation of extrusion channels 50 of consumables of different colors, so as to facilitate the extrusion of consumables of the desired color.

[0094] Please combine again Figures 2 to 4In one embodiment, the mounting frame 10 is generally arranged in a rectangular structure. A first opening 12 is provided on one side of the mounting frame 10 along a first direction X. A receiving groove 11 is provided on one side of the mounting frame 10 along a second direction Y, and the receiving groove 11 is connected to the first opening 12. Along the second direction Y, the receiving groove 11 does not penetrate the mounting frame 10, so that the receiving groove 11 has a first inner wall P1. Along the third direction Z, the inner walls of the upper and lower sides of the receiving groove 11 are a top wall P2 and a bottom wall P3, respectively. A plurality of extrusion assemblies 30 can be slidably connected to the receiving groove 11.

[0095] Furthermore, the multi-consumable extrusion device 100 also includes a protection frame 60 and a second driving member 80. The protection frame 60 is generally arranged in an "L"-shaped structure, and the protection frame 60 is arranged around the notch of the mounting frame 10 provided with the receiving groove 11 and the outer periphery of the first opening 12 to close the receiving groove 11 to prevent the extrusion assembly 30 located in the receiving groove 11 from being damaged. The protection frame 60 and the mounting frame 10 can be detachably connected by fasteners such as screws.

[0096] Along the first direction X, a through hole 17 is provided on the side of the mounting frame 10 away from the first opening 12, and the through hole 17 is connected to the receiving groove 11. The second driving member 80 is a motor or the like, and is installed on the side of the mounting frame 10 away from the first opening 12. The driving end of the second driving member 80 passes through the through hole 17 and is located in the receiving groove 11, one end of the extrusion driving wheel 20 is fixed to the driving end of the second driving member 80 located in the receiving groove 11, and the other end of the extrusion driving wheel 20 is passed through the plurality of extrusion components 30.

[0097] The second driving member 80 is installed on the mounting frame 10 , and the second driving member 80 is transmission-connected to the extrusion driving wheel 20 to drive the extrusion driving wheel 20 to rotate.

[0098] Please combine again Figures 2 to 4 In one embodiment, the extrusion assembly 30 further includes a sliding member 31. The extrusion driven wheel 32 is rotatably connected to the sliding member 31, and the direction of the axis of the extrusion driven wheel 32 is parallel to the first direction X, so that the extrusion driven wheel 32 can rotate around the first direction X. After the extrusion driven wheel 32 approaches the extrusion driving wheel 20, the extrusion driving wheel 20 engages with the extrusion driven wheel 32, and the extrusion driven wheel 32 is driven by the extrusion driving wheel 20 to rotate. When the extrusion driving wheel 20 engages with the extrusion driven wheel 32, there is a gap between at least part of the extrusion driving wheel 20 and the extrusion driven wheel 32 to form an extrusion channel 50, so that the extrusion driving wheel 20 and the extrusion driven wheel 32 apply an external force to the consumables located in the extrusion channel 50 during the rotation process, and the consumables are continuously pulled to move along the extrusion channel 50 by the external force.

[0099] Along the second direction Y, the sliding member 31 is slidably connected to the mounting frame 10, so that the sliding member 31 carries the extrusion driven wheel 32 to move between the first position and the second position, so as to drive the extrusion driven wheel 32 to approach or move away from the extrusion driving wheel 20. The top wall P2 and the bottom wall P3 are both provided with a plurality of guide grooves 13, and the number of the guide grooves 13 is the same as the number of the extrusion assembly 30. Along the first direction X, the plurality of guide grooves 13 are arranged at intervals, and the extending direction of the guide grooves 13 is parallel to the second direction Y. Along the third direction Z, the upper and lower sides of the sliding member 31 are both provided with sliding protrusions 311, and the sliding protrusion 311 on the upper side of each sliding member 31 can be slidably received in a guide groove 13 opened at the top wall P2, and the sliding protrusion 311 on the lower side of each sliding member 31 can be slidably received in a guide groove 13 opened at the bottom wall P3, so as to ensure that the sliding direction of the sliding member 31 is not easily offset. The above-mentioned "accommodation" means that the guide groove 13 provides an installation space for the sliding protrusion 311, and the installation space can be used for the sliding protrusion 311 to slide, and the inner wall of the installation space is used to support the sliding protrusion 311 to play a role of limiting. When the sliding protrusion 311 is accommodated in the guide groove 13, the sliding protrusion 311 can be in a state of sliding connection with the groove wall of the guide groove 13, and the sliding protrusion 311 can also be in a state of being disconnected from the groove wall of the guide groove 13. The "accommodation" that appears later in this article all refers to the same meaning.

[0100] Further, along the first direction X, a through hole 315 and a mounting groove 314 are provided on one side of the sliding member 31 close to the first opening 12. Along the second direction Y, the mounting groove 314 and the through hole 315 are spaced apart. Along the first direction X, the mounting groove 314 does not penetrate the sliding member 31, so that the mounting groove 314 has a second inner wall P4. A rotating column 3141 is convexly provided at the center of the second inner wall P4, and the extrusion driven wheel 32 is rotatably connected to the rotating column 3141, so that the extrusion driven wheel 32 can rotate around the axis of the rotating column 3141. The outer circumference of the extrusion driven wheel 32 is spaced apart from the inner circumference of the mounting groove 314 to prevent the inner circumference of the mounting groove 314 from contacting the extrusion driven wheel 32 and affecting its rotation.

[0101] In particular, a connection opening 3142 is formed on the inner peripheral wall of the installation groove 314 on one side close to the through hole 315 . The connection opening 3142 is connected to the through hole 315 to allow a portion of the extruded driven wheel 32 to pass through the connection opening 3142 .

[0102] Along the first direction X, the through hole 315 passes through the sliding member 31, the extrusion driving wheel 20 is arranged in the through hole 315, and the portion of the extrusion driving wheel 20 located in the through hole 315 can form an extrusion channel 50 with the portion of the extrusion driven wheel 32 passing through the connecting port 3142. The extrusion driving wheel 20 is arranged in the through hole 315 opened by the sliding member 31 of each extrusion assembly 30, so that each extrusion assembly 30 shares one extrusion driving wheel 20, thereby reducing the volume of the multi-consumable extrusion device 100.

[0103] In particular, the diameter of the through hole 315 is larger than the outer diameter of the extrusion driving wheel 20, so that an escape space is left between the extrusion driving wheel 20 and the hole wall of the through hole 315 to prevent the hole wall of the through hole 315 from abutting against the extrusion driving wheel 20 and affecting the rotation of the extrusion driving wheel 20 during the sliding process of the sliding member 31.

[0104] Furthermore, along the third direction Z, a feed hole 312 and a discharge hole 313 are respectively formed on opposite sides of the sliding member 31 , and the feed hole 312 and the discharge hole 313 are respectively used to connect the two ends of the extrusion channel 50 .

[0105] The feed hole 312 , the discharge hole 313 , and the connection port 3142 are substantially located in the same vertical direction, and the feed hole 312 and the discharge hole 313 are both connected to the connection port 3142 , so that the feed hole 312 and the discharge hole 313 can both be connected to the extrusion channel 50 .

[0106] A second opening 14 is formed on the top wall P2 of the mounting frame 10. The second opening 14 passes through the top wall P2 and is connected to a feed hole 312 formed on a sliding member 31 of a plurality of extrusion assemblies 30, so that the plurality of extrusion assemblies 30 can receive consumables from the second opening 14 to the feed hole 312 and then enter the extrusion channel 50.

[0107] A third opening 15 is formed on the bottom wall P3 of the mounting frame 10. The third opening 15 passes through the bottom wall P3 and is connected to discharge holes 313 formed on the sliding members 31 of the plurality of extrusion assemblies 30, so that the plurality of extrusion assemblies 30 can deliver the consumables in the extrusion channel 50 from the discharge holes 313 to the third opening 15 to leave the multi-consumable extrusion device 100.

[0108] Please combine again Figures 2 to 4 In one embodiment, the multi-consumable extrusion device 100 further includes an elastic member 33, which is located at the second side W2 of the extrusion assembly 30, and the first side W1 and the second side W2 are two opposite sides of the extrusion assembly 30 along the second direction Y. The elastic member 33 is located on the side of the sliding member 31 away from the switching member 40, and the elastic member 33 is elastically connected between the sliding member 31 and the mounting frame 10 to provide an elastic force to make the sliding member 31 close to the extrusion driving wheel 20.

[0109] Specifically, the elastic member 33 is a compression spring or the like. The elastic member 33 is located between the sliding member 31 and the first inner wall P1, and the two ends of the elastic member 33 are elastically connected to the sliding member 31 and the first inner wall P1, respectively, so that the elastic member 33 applies an elastic force to the sliding member 31 to move away from the first inner wall P1, so that the sliding member 31 always has a tendency to approach the switching member 40. The first inner wall P1 is provided with a connecting groove 16, and one end of the elastic member 33 away from the sliding member 31 is received in the connecting groove 16.

[0110] In particular, the number of elastic members 33 in one extrusion assembly 30 is two, and along the third direction Z, the two elastic members 33 are arranged at intervals, and the two elastic members 33 jointly apply elastic force to the sliding member 31, which can improve the stability of the sliding member 31 during movement. In addition, along the third direction Z, the elastic members 33 of each extrusion assembly 30 are located at the same height, so that the movement state of the sliding member 31 of each extrusion assembly 30 when pushed by the elastic member 33 can be substantially the same.

[0111] Please combine again Figures 2 to 5 In one embodiment, the multi-consumable extrusion device 100 further includes a first driving member 70. The first driving member 70 is transmission-connected to the switching member 40, and is used to drive the switching member 40 to rotate. The first driving member 70 is a motor, and along the second direction Y, the first driving member 70 is installed on the side of the protective frame 60 away from the mounting frame 10. The switching member 40 is rotatably received in the receiving groove 11, and is located on the side of the sliding member 31 away from the elastic member 33. The driving end of the first driving member 70 passes through the protective frame 60 and is transmission-connected to the switching member 40, and is used to drive the switching member 40 to rotate. The switching member 40 has a rotation axis H, and the switching member 40 can rotate around the rotation axis H.

[0112] The switching member 40 is generally cylindrical in structure, and a supporting surface is provided near the first side W1 of the switching member 40, and the supporting surface is a planar structure. The supporting surface is configured to support the sliding member 31 of each extrusion assembly 30 away from the extrusion driving wheel 20. The supporting surface is provided with a groove portion 41, which is formed by being recessed inward from the supporting surface, and the groove portion 41 is used to partially accommodate the extrusion assembly 30 to allow the extrusion assembly 30 to approach the extrusion driving wheel 20.

[0113] Further, the extrusion assembly 30 is provided with a supporting member 34. The supporting member 34 is convexly arranged on the side of the sliding member 31 away from the elastic member 33, and the extending direction of the supporting member 34 is parallel to the second direction Y. The supporting member 34 includes a first supporting portion 341 and a second supporting portion 342. A mounting hole 316 is provided on the side of the sliding member 31 away from the elastic member 33. The mounting hole 316 is a blind hole, and the axis of the mounting hole 316 is parallel to the second direction Y. The first supporting portion 341 is a cylindrical structure, and one end of the first supporting portion 341 is accommodated in the mounting hole 316, and the second supporting portion 342 is connected to or supported by the other end of the first supporting portion 341. The second supporting portion 342 can be integrally formed with the first supporting portion 341 or separately arranged. The second supporting portion 342 can be partially exposed to the mounting hole 316 or fully exposed to the mounting hole 316.

[0114] The second abutting portion 342 is provided in a spherical structure, the groove portion 41 is provided in a hemispherical structure, and the groove portion 41 is adapted to the second abutting portion 342. The second abutting portions 342 of the plurality of extrusion assemblies 30 are all located on the rotation path of the groove portion 41, so that during the rotation of the switching member 40, the groove portion 41 can cooperate with different second abutting portions 342.

[0115] When the abutting surface abuts against the second abutting portion 342 , the elastic member 33 is in a compressed state, and the extrusion driven wheel 32 moves away from the extrusion driving wheel 20 .

[0116] When the switching member 40 rotates until the second supporting portion 342 of a sliding member 31 is partially accommodated in the groove portion 41, the elastic member 33 connected to the sliding member 31 applies an elastic force to it, so that the sliding member 31 can approach a certain distance toward the switching member 40, and then the sliding member 31 drives the extrusion driven wheel 32 to approach the extrusion driving wheel 20 to form an extrusion channel 50.

[0117] In particular, the spacing between the inner wall of the groove portion 41 and the abutting surface is the same as the distance when the sliding member 31 moves from the second position to the first position, so as to ensure that when the second abutting portion 342 is accommodated in the groove portion 41, the extrusion driven wheel 32 moves to the appropriate position to form an extrusion channel 50 with the extrusion driving wheel 20.

[0118] Please combine again Figures 2 to 5 In one embodiment, the number of the grooves 41 is less than the number of the abutting members 34. The extrusion assembly 30 is configured such that each abutting member 34 is located on the rotation path of at least one groove 41 in the switching member 40, and only one abutting member 34 is located in the groove 41 at the same time.

[0119] In some embodiments, the number of the abutting members 34 is A+B (A and B are both positive integers greater than or equal to 1, and A≥B), and the spacing between any two adjacent abutting members 34 in the first direction X is the same. Along the first direction X, the abutting members 34 are distributed on both sides of the rotation axis H. Figure 6 As shown, along the first direction X, the number of the abutting members 34 located on the right side of the rotation axis H is A, and the number of the abutting members 34 located on the left side of the rotation axis H is B. The abutting members 34 of number B can all find corresponding abutting members 34 among the abutting members 34 of number A, so that the two abutting members 34 can share one groove portion 41.

[0120] Among them, among the abutting members 34 located on the right side of the rotation axis H, in order from left to right, the distances between each abutting member 34 and the rotation axis H are L 11 , L 12 ...L 1A Among the abutting members 34 located on the left side of the rotation axis H, the distances from each abutting member 34 to the rotation axis H are L, ... 21 , L 22 ...L 2B .

[0121] Along the first direction X, the groove portions 41 are distributed on the left side or the right side of the rotation axis H alone, or the groove portions 41 are distributed on both the left side and the right side of the rotation axis H. The number of the groove portions 41 is C.

[0122] The grooves 41 are arranged in the order of the closest distance to the rotation axis H to the farthest distance, and each groove 41 corresponds to each abutment member 34 located on the right side of the rotation axis H, and the distance between each groove 41 and the rotation axis H is L 31 , L 32 ...L 3C .

[0123] Where C = A, and A ≥ B, L 11 =L 31 ,L 12 =L 32 ,L 1A =L 3C And so on, to ensure that the abutting members 34 located on the right side of the rotation axis H along the first direction X are all located on the rotation path of the groove portions 41 of number C. In addition, L 11 =L 21 ,L 12 =L 22 ,L 1B =L 2B and so on.

[0124] It can be understood that the distribution of the abutting members 34 located on the right side of the rotation axis H may not be arranged in sequence along the first direction X, that is, the abutting members 34 located on the right side of the rotation axis H may be staggered in the third direction Z, as long as the above formula is satisfied to ensure that L 1A =L 3C Correspondingly, the distribution of the abutting members 34 located on the left side of the rotation axis H may not be arranged in sequence along the first direction X, that is, the abutting members 34 located on the left side of the rotation axis H may be staggered in the third direction Z, as long as the above formula is satisfied to ensure that L 2B =L 3B That's it.

[0125] When other embodiments are adopted, the distances between any two adjacent abutting members 34 in the first direction X may be different from each other, and ... 11 , L 12 ...L 1A Set the corresponding L 31 , L 32 ...L 3C Distance is enough.

[0126] When other embodiments are adopted, the groove portion 41 may also be provided with only one groove. Accordingly, the second abutting portions 342 of each extrusion assembly 30 are arranged roughly in an arc shape. In this embodiment, each second abutting portion 342 is at the same distance from the rotation axis H to ensure that each second abutting portion 342 is located on the rotation path of the groove portion 41.

[0127] In this embodiment, the number of the extrusion components 30 is four. It is understandable that in other embodiments, the number of the extrusion components 30 may also be six or eight or other numbers.

[0128] The groove portion 41 includes a first groove 411 and a second groove 412, and the first groove 411 and the second groove 412 have the same size and shape. The distance between the first groove 411 and the center of the abutting surface is smaller than the distance between the second groove 412 and the center of the abutting surface. Among the four extrusion assemblies 30, the second abutting portions 342 of the two middle extrusion assemblies 30 are located on the rotation path of the first groove 411, so that the second abutting portions 342 of the two middle extrusion assemblies 30 are used in conjunction with the first groove 411, and the second abutting portions 342 of the two outermost extrusion assemblies 30 are located on the rotation path of the second groove 412, so that the second abutting portions 342 of the two outermost extrusion assemblies 30 are used in conjunction with the second groove 412.

[0129] In particular, by adjusting the positions of the first groove 411 and the second groove 412 on the abutting surface, the arrangement direction of the second abutting portions 342 of the four extrusion components 30 can be made parallel to the first direction X, so that the positions at which the external force is applied to each sliding member 31 by the switching member 40 are roughly the same, ensuring that the moving states of each sliding member 31 can remain roughly the same, so as to improve the consistency of the extrusion channels 50 formed by each extrusion component 30.

[0130] Please combine again Figures 2 to 4 In one embodiment, the multi-consumable material extrusion device 100 further includes an adapter frame 90 . The top end of the adapter frame 90 is located in the third opening 15 , and the portion of the adapter frame 90 located in the third opening 15 is connected to the mounting frame 10 .

[0131] The top surface of the adapter frame 90 is provided with a plurality of material introduction channels 91, and the number of the plurality of material introduction channels 91 is the same as the number of the plurality of extrusion assemblies 30. The extending direction of the material introduction channel 91 is parallel to the third direction Z and passes through the adapter frame 90. The top of the material introduction channel 91 is connected to the discharge hole 313 to receive the consumables sent from the discharge hole 313. Along the first direction X, the plurality of material introduction channels 91 are sequentially spaced.

[0132] Along the second direction Y, a plurality of control ports 92 are provided at the middle position of one side of the adapter frame 90. The plurality of control ports 92 are provided corresponding to the plurality of material introduction channels 91, and the control ports 92 are connected to the corresponding material introduction channels 91.

[0133] In some embodiments, the adapter frame 90 is further provided with a plurality of control valves 93, and the plurality of control valves 93 are provided corresponding to the plurality of control ports 92, and a control valve 93 is installed in each control port 92. A cutting piece 94 is provided at the driving end of the control valve 93, and the control valve 93 can drive the cutting piece 94 to rotate or slide, so that the cutting piece 94 approaches or moves away from the consumables in the guide channel 91 to achieve the cutting effect on the consumables.

[0134] The adapter frame 90 is further provided with a baffle 95 , which is installed on one side of the adapter frame 90 where the control ports 92 are provided, and is used to close the multiple control ports 92 . The baffle 95 can be used to install the control valve 93 .

[0135] It is understandable that, when other embodiments are adopted, the control valve 93 can also be used to detect whether consumables are passing through the current feed channel 91 .

[0136] like Figure 7 As shown, combined with Figure 3 The embodiment of the present application further provides a print head 200, including a nozzle device 210 and the above-mentioned multi-consumable material extrusion device 100. The nozzle device 210 is connected to the multi-consumable material extrusion device 100, and is used to guide the consumables extruded by the multi-consumable material extrusion device 100 to the molding substrate 220.

[0137] Specifically, the nozzle device 210 is detachably connected to one end of the adapter frame 90 away from the mounting frame 10. The nozzle device 210 is provided with a feeding channel 211, the number of which can be one, and the number of the feeding channel 211 can also be the same as the number of the guide channel 91.

[0138] One end of the feeding channel 211 is connected to one end of the guide channel 91 away from the discharge hole 313 , and the other end of the feeding channel 211 is used to guide the consumables to the molding substrate 220 .

[0139] like Figure 8 As shown, combined with Figure 2 The embodiment of the present application further provides a 3D printing device 300, comprising a support frame 230, a molding substrate 220, and the above-mentioned print head 200. The molding substrate 220 is located below the print head 200. The print head 200 is movably connected to the support frame 230, and the print head 200 can slide relative to the support frame 230 along the first direction X, the second direction Y, or the third direction Z to adjust the position of the print head 200 relative to the molding substrate 220.

[0140] Furthermore, the 3D printing device 300 further includes a feeding assembly (not shown), which is connected to the feed hole 312 of the multi-consumable extrusion device 100 through a pipe. The feeding assembly can be installed at the proximal end or the distal end of the multi-consumable extrusion device 100 to achieve proximal or distal feeding of the 3D printing device 300.

[0141] In the above, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A multi-consumable extrusion device, characterized in that: include: Mounting frame; An extrusion driving wheel is rotatably arranged on the mounting frame; A plurality of extrusion assemblies, the plurality of extrusion assemblies are sequentially arranged along a first direction and movably arranged on the mounting frame between a first position and a second position along a second direction, each of the extrusion assemblies comprises an extrusion driven wheel, and the second direction is arranged to intersect with the first direction; a switching member disposed on a first side of the extrusion assembly, the switching member being configured to be movable relative to the plurality of extrusion assemblies so that at least one of the extrusion assemblies is located at the first position and the other extrusion assemblies are located at the second position; Among them, the extrusion driven wheel of the extrusion assembly located at the first position is arranged close to the extrusion driving wheel to form an extrusion channel in the third direction; the extrusion driven wheel of the extrusion assembly located at the second position is arranged away from the extrusion driving wheel, and the third direction is arranged to intersect with the first direction and the second direction.

2. The multi-consumable material extrusion device according to claim 1, characterized in that: The switching member is provided with a supporting surface near the first side, and the supporting surface is configured to support at least one of the extrusion components so that the extrusion driven wheel thereof is away from the extrusion driving wheel; The abutting surface is provided with a groove portion, and the groove portion is configured to partially accommodate the extrusion component to allow the extrusion component to approach the extrusion driving wheel.

3. The multi-consumable extrusion device according to claim 2, characterized in that: Each of the extrusion assemblies is provided with a supporting member, and at least a portion of the supporting member can be received in the groove portion, and the supporting members of the plurality of extrusion assemblies are located on a rotation path of the groove portion.

4. The multi-consumable material extrusion device according to claim 3, characterized in that: The number of the groove portions is less than the number of the abutting members, and the extrusion assembly is configured such that each of the abutting members is located on the rotation path of at least one of the groove portions in the switching member, and at the same time, only one of the abutting members is located in the groove portion.

5. The multi-consumable material extrusion device according to claim 1, characterized in that: The extrusion assembly further comprises a sliding member, and the extrusion driven wheel is rotatably disposed on the sliding member; The sliding member is movably disposed on the mounting frame along the second direction to drive the extrusion driven wheel to approach or move away from the extrusion driving wheel.

6. The multi-consumable material extrusion device according to claim 5, characterized in that: Along the first direction, a through hole and a mounting groove are provided on one side of the sliding member, the mounting groove and the through hole are arranged at intervals, the extrusion driving wheel is passed through the through hole and rotatably mounted in the mounting groove; The inner peripheral wall of the installation groove is provided with a connection port, and the connection port is connected to the through hole to allow a part of the extrusion driven wheel to pass through the connection port.

7. The multi-consumable material extrusion device according to claim 5, characterized in that: The multi-consumable material extrusion device further comprises an elastic member, wherein the elastic member is located at a second side of the extrusion assembly, and the first side and the second side are opposite sides of the extrusion assembly; The elastic member is elastically connected between the sliding member and the mounting frame to provide an elastic force for making the sliding member close to the extrusion driving wheel.

8. The multi-consumable extrusion device according to any one of claims 1 to 7, characterized in that: The multi-consumable material extrusion device also includes a first driving member, which is transmission-connected to the switching member to drive the switching member to rotate.

9. The multi-consumable extrusion device according to any one of claims 1 to 7, characterized in that: The multi-consumable material extrusion device also includes a second driving member, which is installed on the mounting frame and is transmission-connected to the extrusion driving wheel to drive the extrusion driving wheel to rotate.

10. A print head, characterized in that: It comprises a nozzle device and a multi-consumable material extrusion device as described in any one of claims 1 to 9, wherein the nozzle device is connected to the multi-consumable material extrusion device and is used to guide the consumables extruded by the multi-consumable material extrusion device to a molding substrate.

11. A 3D printing device, characterized in that: It comprises the multi-consumable material extrusion device as claimed in any one of claims 1 to 9 or the print head as claimed in claim 10.

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