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, at least two first extrusion wheels, a movable unit, a rotating part and a first driving assembly; the at least two first extrusion wheels are arranged in sequence, and the first extrusion wheels are rotatably connected to the mounting frame; a movable unit is arranged on at least one side of each first extrusion wheel in the at least two first extrusion wheels, the movable unit is movably connected to the mounting frame and can be close to or away from the first extrusion wheel, and the movable unit is used for forming an extrusion channel after being close to the first extrusion wheel; the rotating part is configured to allow at least one movable unit to be close to the first extrusion wheel and abut against the remaining movable units to be away from the first extrusion wheel, and the rotating part is rotationally connected to the mounting frame and used for enabling the different movable units to be close to the first extrusion wheel; the first driving assembly is in transmission connection with the rotating part and used for driving the rotating part to rotate.

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 3D printers are equipped with a consumable switching mechanism to switch between two different consumable extrusion channels. However, with the rise of multi-color printing technology, 3D printers need to be equipped with multiple consumable switching mechanisms to achieve the switching of multiple consumable extrusion channels, which causes the size of the 3D printer's print head to become larger, 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 the first aspect, the present application provides a multi-consumable extrusion device, which includes a mounting frame, at least two first extrusion wheels, a movable unit, a rotating member and a first driving assembly; at least two of the first extrusion wheels are arranged in sequence, and the first extrusion wheels are rotatably connected to the mounting frame; at least one side of each of the at least two first extrusion wheels is provided with the movable unit, the movable unit is movably connected to the mounting frame, and can approach or move away from the first extrusion wheel, and the movable unit is used to form an extrusion channel after approaching the first extrusion wheel; the rotating member is configured to allow at least one of the movable units to approach the first extrusion wheel and to hold the remaining movable units away from the first extrusion wheel, and the rotating member is rotatably connected to the mounting frame to allow different movable units to approach the first extrusion wheel; the first driving assembly is transmission-connected to the rotating member, and the first driving assembly is used to drive the rotating member to rotate.

[0005] In a possible embodiment, the rotating member is provided with a groove portion, and the groove portion is used to at least partially accommodate the movable unit to allow the accommodated movable unit to form the extrusion channel after approaching the first extrusion wheel. When the groove portion accommodates the movable unit, the rotating member holds the remaining movable unit away from the first extrusion wheel.

[0006] In a possible embodiment, the movable unit is provided with a supporting portion, and the supporting portion of at least one of the movable units is arranged around the outer circumference of the rotating part, the outer circumference of the rotating part is used to support the supporting portion, the groove portion is recessed inward from the outer circumference of the rotating part, and the groove portion is used to accommodate the supporting portion.

[0007] In a possible implementation, the activity unit includes:

[0008] A movable bracket, one end of which is rotatably connected to the mounting bracket, and the other end of which is provided with a supporting portion, and the supporting portion is used to support the rotating member;

[0009] The second extrusion wheel is rotatably connected to the movable bracket, and the second extrusion wheel is used for transmission connection to the first extrusion wheel, so that the extrusion channel is formed between the first extrusion wheel and the second extrusion wheel.

[0010] In a possible embodiment, the multi-consumable material extrusion device also includes an elastic member, and the elastic member is provided between each movable unit and the mounting frame, and the two ends of the elastic member are elastically connected to the movable unit and the mounting frame respectively, for applying an elastic force to the movable unit close to the first extrusion wheel.

[0011] In a possible implementation, the first driving assembly includes a first driving member and a rotating shaft, the rotating shaft is drivingly connected to the first driving member, and the rotating shaft is rotatably connected to the mounting bracket, and the rotating member is sleeved on the outer circumference of the rotating shaft.

[0012] In a possible implementation, the first driving component includes:

[0013] A toggle member, comprising a first end and a second end, wherein the first end is rotatably connected to the mounting frame, and the second end is used to collide with a support frame of a 3D printing device to provide a driving force for driving the toggle member to rotate;

[0014] The anti-return member is connected to the toggle member, and the anti-return member is transmission-connected to the rotating member to drive the rotating member to rotate in one direction.

[0015] In a possible implementation, the multi-consumable material extrusion device further includes a second driving assembly, which is transmission-connected to the at least two first extrusion wheels and is used to drive the at least two first extrusion wheels to rotate synchronously.

[0016] 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.

[0017] In a third aspect, an embodiment of the present application further provides a 3D printing device, comprising a support frame and the above-mentioned print head, wherein the print head is movably connected to the support frame, and the support frame is used to support a driving member of the multi-consumable material extrusion device in a moving state to drive the driving member to rotate.

[0018] The multi-consumable extrusion device of the present application is provided with at least two first extrusion wheels in sequence, and a movable unit is provided on one side or both sides of each first extrusion wheel, and an extrusion channel for the consumables is formed by the movable unit approaching the first extrusion wheel, thereby realizing the extrusion of multi-color consumables. In addition, the present application is provided with only a single rotating member, and the single rotating member is used in conjunction with each movable unit, which can allow at least one movable unit to approach the first extrusion wheel to form an extrusion channel, and the rotating member pushes the remaining movable units away from the first extrusion wheel, and the first driving component drives the rotating member to rotate to make different movable units approach the first extrusion wheel, thereby realizing the formation of extrusion channels for consumables of different colors, so as to extrude consumables of the desired color. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of the multi-consumable extrusion device in Example 1 of the present application.

[0020] Figure 2 for Figure 1 Schematic top view of the multi-consumable extrusion device in Example 1.

[0021] Figure 3 for Figure 1 A schematic diagram of the partial structure of the multi-consumable extrusion device in Example 1.

[0022] Figure 4 for Figure 1 Schematic diagram of the explosion of the multi-consumable extrusion device in Example 1.

[0023] Figure 5 This is a three-dimensional schematic diagram of the multi-consumable extrusion device in Example 2 of the present application.

[0024] Figure 6 for Figure 5 Schematic diagram of the explosion of the multi-consumable extrusion device in Example 2.

[0025] Figure 7 for Figure 5 Schematic diagram of the installation of the rotating parts and the anti-return parts of the multi-consumable extrusion device in Example 2.

[0026] Figure 8 FIG. 1 is a schematic diagram of the structure of a print head of the present application in one embodiment.

[0027] Fig. 9 This is a schematic diagram of the structure of a 3D printing device in one embodiment of the present application.

[0028] Fig.10 for Fig. 9 A schematic top view of a 3D printing device in one embodiment.

[0029] Description of main component symbols:

[0030] 3D printing equipment 300

[0031] Print head 200

[0032] Multi-consumable material extrusion device 100a, 100b

[0033] First direction X

[0034] Second direction Y

[0035] The third direction Z

[0036] The first surface P1

[0037] The second surface P2

[0038] Mounting frame 10

[0039] Side panel 11

[0040] The first rotating hole 110

[0041] The third perforation 111

[0042] Bottom plate 12

[0043] Second convex portion 121

[0044] Mounting column 1210

[0045] The second perforation 1211

[0046] Feed hole 122

[0047] Top plate 13

[0048] Fixed protrusion 131

[0049] Fixed slot 1310

[0050] Partition 14

[0051] Limit column 15

[0052] The second rotating hole 150

[0053] Accommodation chamber 16

[0054] Active cavity 17

[0055] The first extrusion wheel 21

[0056] First meshing portion 211

[0057] First extrusion portion 212

[0058] First rotating shaft 213

[0059] Activity Unit 22

[0060] Movable bracket 221

[0061] Supporting part 2210

[0062] Mounting slot 2211

[0063] The third rotating hole 2212

[0064] First convex part 2213

[0065] First perforation 2214

[0066] The second extrusion wheel 222

[0067] The second meshing portion 2221

[0068] Second extrusion part 2222

[0069] Second shaft 2223

[0070] The third rotating shaft 223

[0071] Elastic member 23

[0072] Extrusion channel 24

[0073] Rotating member 30

[0074] Groove portion 31

[0075] Rotating slot 32

[0076] Check groove 33

[0077] First drive assembly 40a, 40b

[0078] The first driving member 41

[0079] Rotating shaft 42

[0080] Toggle 43

[0081] First end portion 431

[0082] Second end 432

[0083] Anti-return piece 44

[0084] Center 441

[0085] Extension 442

[0086] Torsion spring 45

[0087] Second drive assembly 50

[0088] The second driving member 51

[0089] Transmission mechanism 52

[0090] First gear 521

[0091] Second gear 522

[0092] The third gear 523

[0093] Sprinkler device 60

[0094] Guide channel 61

[0095] Molding base plate 70

[0096] Support frame 80

[0097] Support body 81

[0098] Impact part 810

[0099] Optical axis 82

[0100] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0105] Example 1

[0106] like Figures 1 to 4 As shown, this embodiment provides a multi-consumable material extrusion device 100a. The multi-consumable material extrusion device 100a includes a mounting frame 10, at least two first extrusion wheels 21, a movable unit 22, a rotating member 30, and a first driving assembly 40a.

[0107] 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.

[0108] At least two first extrusion wheels 21 are arranged in sequence and spaced apart along the first direction X. The first extrusion wheel 21 is rotatably connected to the mounting frame 10 , and the first extrusion wheel 21 can rotate around the first direction X. Along the second direction Y, the movable unit 22 is arranged on at least one side of the first extrusion wheel 21 .

[0109] For example, Figure 1 As shown, the number of first extrusion wheels 21 in this embodiment is set to two, and each first extrusion wheel 21 is provided with two movable units 22 cooperating therewith, and the two movable units 22 are arranged on opposite sides of the first extrusion wheel 21, so that four-color printing can be achieved. It is understandable that the number of first extrusion wheels 21 can also be set to one or three or more, and the number of movable units 22 corresponding to a single first extrusion wheel 21 can also be set to only one. The number of first extrusion wheels 21 of the present application and the number of movable units 22 corresponding to each first extrusion wheel 21 can be adaptively selected according to actual design requirements.

[0110] Further, the movable unit 22 can be movably connected to the mounting frame 10, and the movable unit 22 can rotate around the first direction X to approach or move away from the first extrusion wheel 21. The movable unit 22 is used to form an extrusion channel 24 after approaching the first extrusion wheel 21, and the consumables are extruded through the cooperation of the movable unit 22 and the first extrusion wheel 21.

[0111] The rotating member 30 is configured to allow at least one active unit 22 to approach the first extrusion wheel 21 and to hold the remaining active units 22 away from the first extrusion wheel 21. The rotating member 30 is rotatably connected to the mounting frame 10 and rotates around the third direction Z to allow different active units 22 to approach the first extrusion wheel 21. The first driving assembly 40a is transmission-connected to the rotating member 30, and the first driving assembly 40a is used to drive the rotating member 30 to rotate.

[0112] In this way, the multi-consumable extrusion device 100a of the present application is provided with at least two first extrusion wheels 21 in sequence, and at least one side of each first extrusion wheel 21 is provided with a movable unit 22, and the extrusion channel 24 of the consumables is formed by the movable unit 22 approaching the first extrusion wheel 21, thereby realizing the extrusion of multi-color consumables. In addition, the present application is provided with only a single rotating member 30, and the single rotating member 30 is used in conjunction with each movable unit 22, so that at least one movable unit 22 can be allowed to approach the first extrusion wheel 21 to form an extrusion channel 24, and the rotating member 30 pushes the remaining movable units 22 away from the first extrusion wheel 21, and the first driving component 40a drives the rotating member 30 to rotate to make different movable units 22 approach the first extrusion wheel 21, thereby realizing the formation of extrusion channels 24 of consumables of different colors, so as to extrude consumables of the desired color.

[0113] Please combine again Figures 2 to 4 In this embodiment, the mounting frame 10 includes two side panels 11 , a bottom panel 12 , and a top panel 13 .

[0114] Along the first direction X, the two side plates 11 are arranged in parallel and spaced apart. Along the third direction Z, the bottom plate 12 is connected to the bottom ends of the two side plates 11 , and the top plate 13 is connected to the top ends of the two side plates 11 .

[0115] A limiting column 15 is protruded from one end of the bottom plate 12 near the top plate 13. The limiting column 15 protrudes toward the top plate 13, and its top end is spaced apart from the top plate 13. A partition 14 is provided at the top end of the limiting column 15, and both ends of the partition 14 are respectively connected to the two side plates 11. The partition 14 is spaced apart from the top plate 13, and a receiving cavity 16 is formed therebetween. The rotating member 30 is rotatably received in the receiving cavity 16.

[0116] Furthermore, the limiting column 15 is substantially located in the middle area between the two side plates 11 to divide the space between the two side plates 11 into two active chambers 17. The two first extrusion wheels 21 are respectively disposed in the two active chambers 17.

[0117] It is understandable that when the number of the first extrusion wheels 21 is three or more, the number of the limiting posts 15 can be multiple, and along the first direction X, the multiple limiting posts 15 are sequentially spaced to form multiple active cavities 17, and each active cavity 17 accommodates a first extrusion wheel 21.

[0118] Please combine again Figures 2 to 4 In this embodiment, the first extrusion wheel 21 is further provided with a first rotating shaft 213, the axial direction of the first rotating shaft 213 is parallel to the first direction X, and the first rotating shaft 213 is coaxially arranged with the first extrusion wheel 21. The first rotating shaft 213 is penetrated through the first extrusion wheel 21, and the two ends of the first rotating shaft 213 passing through the first extrusion wheel 21 are rotatably connected to the side plate 11 and the limiting column 15. Both side plates 11 are provided with a first rotating hole 110, and the limiting column 15 is provided with a second rotating hole 150. The first rotating hole 110 and the second rotating hole 150 are coaxially arranged, and the direction of the axes of the two are parallel to the first direction X. The two ends of the first rotating shaft 213 are rotatably received in the first rotating hole 110 and the second rotating hole 150.

[0119] The movable unit 22 includes a movable bracket 221 and a second extrusion wheel 222. One end of the movable bracket 221 is rotatably connected to the mounting frame 10, and the other end of the movable bracket 221 is provided with a supporting portion 2210, and the supporting portion 2210 is used to support the rotating member 30. The second extrusion wheel 222 is rotatably connected to the movable bracket 221, and the second extrusion wheel 222 is used for transmission connection to the first extrusion wheel 21, so that an extrusion channel 24 is formed between the first extrusion wheel 21 and the second extrusion wheel 222.

[0120] In some embodiments, along the second direction Y, the second extrusion wheel 222 is located on one side of the first extrusion wheel 21, and the axial direction of the second extrusion wheel 222 is parallel to the axial direction of the first extrusion wheel 21. The first extrusion wheel 21 includes a first meshing portion 211 and a first extrusion portion 212 coaxially arranged, and the second extrusion wheel 222 includes a second meshing portion 2221 and a second extrusion portion 2222 coaxially arranged.

[0121] When the second extrusion wheel 222 is close to the first extrusion wheel 21, the second meshing portion 2221 meshes with the first meshing portion 211, and the rotating first meshing portion 211 drives the second meshing portion 2221 to rotate, and then the second meshing portion 2221 drives the second extrusion portion 2222 to rotate. When the second meshing portion 2221 meshes with the first meshing portion 211, there is a gap between the second extrusion portion 2222 and the first extrusion portion 212, and the gap forms an extrusion channel 24. The consumables are transported along the extrusion channel 24 through the rotation of the first extrusion portion 212 and the second extrusion portion 2222.

[0122] In some embodiments, the movable bracket 221 is provided with a mounting groove 2211 , and the mounting groove 2211 penetrates the movable bracket 221 along the second direction Y. The second extrusion wheel 222 is rotatably received in the mounting groove 2211 .

[0123] The second extrusion wheel 222 is further provided with a second rotating shaft 2223, the axial direction of the second rotating shaft 2223 is parallel to the first direction X, and is coaxially arranged with the second extrusion wheel 222. The second rotating shaft 2223 is penetrated through the second extrusion wheel 222, and the two ends of the second rotating shaft 2223 passing through the second extrusion wheel 222 are rotatably connected to the two inner walls of the mounting groove 2211. Along the first direction X, the two inner walls of the mounting groove 2211 are both provided with a third rotating hole 2212, the axis direction of the third rotating hole 2212 is parallel to the first direction X, and the two ends of the second rotating shaft 2223 are rotatably received in the two third rotating holes 2212.

[0124] Along the second direction Y, the bottom end of the movable bracket 221 away from the first extrusion wheel 21 is provided with a first convex portion 2213, and the first convex portion 2213 is provided with a first through hole 2214. Along the second direction Y, the two opposite sides of the bottom plate 12 are provided with second convex portions 121, and the second convex portion 121 is located between two adjacent movable brackets 221 along the second direction Y. The second convex portion 121 is provided with a second through hole 1211. Along the second direction Y, the two opposite ends of the side plate 11 are provided with a third through hole 111. The first through hole 2214, the second through hole 1211 and the third through hole 111 located on the same side of the first extrusion wheel 21 are coaxially arranged, and the directions of the axes of the three are parallel to the first direction X.

[0125] The mounting frame 10 is further provided with a third rotating shaft 223, the axial direction of which is parallel to the first direction X, and is penetrated through the first through hole 2214, the second through hole 1211 and the third through hole 111, and the two ends of the third rotating shaft 223 are respectively received in the two third through holes 111. Each movable bracket 221 located on the same side of the first extrusion wheel 21 can rotate around the axis of the third rotating shaft 223, so that the second extrusion wheel 222 installed on the movable bracket 221 is close to or away from the first extrusion wheel 21.

[0126] It is understandable that, when other embodiments are adopted, the third rotating shaft 223 may be provided in plurality, that is, each movable bracket 221 is provided with a third rotating shaft 223. The two ends of the third rotating shaft 223 are respectively received in the third through hole 111 and the second through hole 1211.

[0127] Please combine again Figures 2 to 4 In this embodiment, the multi-consumable extrusion device 100a further includes an elastic member 23, and an elastic member 23 is provided between each movable unit 22 and the mounting frame 10. The two ends of the elastic member 23 are elastically connected to the movable unit 22 and the mounting frame 10, respectively, and are used to apply an elastic force to the movable unit 22 close to the first extrusion wheel 21, so that the movable unit 22 always maintains a rotation tendency close to the first extrusion wheel 21.

[0128] Specifically, two mounting posts 1210 are protruding from the top of the second protrusion 121, and along the first direction X, two elastic members 23 adjacent to the second protrusion 121 are respectively mounted on the two mounting posts 1210. One end of the elastic member 23 is elastically connected to the mounting post 1210, and the other end thereof is elastically connected to the movable bracket 221, and the elastic member 23 is in a compressed state. Along the first direction X, the two mounting posts 1210 are spaced apart, and the mounting posts 1210 are tilted upward and toward the limiting post 15, so that after the elastic member 23 is tilted, it applies an elastic force to the movable bracket 221 to rotate toward the first extrusion wheel 21.

[0129] It is worth noting that when the rotating member 30 allows a movable unit 22 to approach the first extrusion wheel 21, the elastic member 23 gradually resets to drive the movable bracket 221 to rotate toward the first extrusion wheel 21, until the movable bracket 221 drives the second meshing portion 2221 of the second extrusion wheel 222 to mesh with the first meshing portion 211, and the movable bracket 221 partially abuts against the limiting column 15 to prevent the movable bracket 221 from continuing to rotate toward the first extrusion wheel 21, so as to avoid the second meshing portion 2221 squeezing the first meshing portion 211 and causing damage.

[0130] Please combine again Figures 2 to 4 In this embodiment, the multi-consumable material extrusion device 100a further includes a second driving component 50, which is transmission-connected to at least two first extrusion wheels 21 and is used to drive the at least two first extrusion wheels 21 to rotate synchronously.

[0131] Specifically, the second driving assembly 50 includes a second driving member 51 and a transmission mechanism 52 .

[0132] The second driving member 51 is mounted on the outer side of the side plate 11 of the mounting frame 10. The second driving member 51 is a motor or the like. The second driving member 51 is connected to each of the at least two first extrusion wheels 21 through a transmission mechanism 52 to drive each of the first extrusion wheels 21 to rotate synchronously. The use of a single second driving member 51 in conjunction with the transmission mechanism 52 can avoid the setting of multiple second driving members 51, which results in an excessively large volume of the entire multi-consumable extrusion device 100a and increased costs.

[0133] The transmission mechanism 52 includes a first gear 521, a second gear 522 and a third gear 523. The first gear 521 is transmission-connected to the driving end of the second driving member 51, and the first gear 521 is meshedly connected with a second gear 522 adjacent thereto. The number of the second gears 522 is the same as the number of the first extrusion wheels 21. In this embodiment, the number of the first extrusion wheels 21 is two, and the two second gears 522 are respectively arranged on the outer sides of the two side plates 11. One end of the first rotating shaft 213 provided on the first extrusion wheel 21 passes through the side plate 11 and is connected to a second gear 522, so that the first gear 521 is driven to rotate by the second driving member 51, and then the second gear 522 meshed therewith is driven to rotate by the first gear 521.

[0134] The number of the third gears 523 is the same as that of the second gears 522, that is, the number of the third gears 523 is two, and each of the third gears 523 is located on the same side of the first extrusion wheel 21. The two third gears 523 are rotatably connected to the two side plates 11 respectively. One third gear 523 is rotatably connected to the side plate 11 close to the second driving member 51, and the third gear 523 is meshed with the second gear 522 meshed with the first gear 521, so that the second gear 522 driven by the first gear 521 to rotate further drives the third gear 523 meshed with it to rotate. Each of the remaining third gears 523 is respectively meshed with each of the remaining second gears 522, and each third gear 523 is coaxially connected to the third rotating shaft 223, so that the third gear 523 driven by the second gear 522 to rotate drives the third rotating shaft 223 to rotate, and the third rotating shaft 223 drives the remaining third gears 523 to rotate, and the remaining third gears 523 further drive the second gears 522 meshed with them to rotate, and the second gear 522 further drives the first extrusion wheel 21 connected to it to rotate, thereby realizing the synchronous rotation of each first extrusion wheel 21.

[0135] In this way, each third gear 523 and each movable bracket 221 located on the same side as the third gear 523 share the same third rotating shaft 223, which can reduce the volume of the entire multi-consumable extrusion device 100a. When the third rotating shaft 223 rotates with the third gear 523, the third rotating shaft 223 will apply a certain torque to the movable bracket 221 sleeved on the outer peripheral surface of the third rotating shaft 223, which may easily cause the second extrusion wheel 222 to deviate when working with the first extrusion wheel 21. Therefore, in actual design, it is necessary to adjust the compression degree of the elastic member 23 to ensure that the elastic force applied by the elastic member 23 to the movable bracket 221 can ensure the stability of the second extrusion wheel 222 when working with the first extrusion wheel 21.

[0136] It is understandable that when other embodiments are adopted, each third gear 523 can also be connected by other shafts, and the third rotating shaft 223 is only used for installing the movable bracket 221, which can improve the stability of the second extrusion wheel 222 and the first extrusion wheel 21 when working together.

[0137] Please combine again Figures 2 to 4 In this embodiment, the rotating member 30 is a substantially disc-shaped structure, and the rotating member 30 is located in the receiving chamber 16, and the bottom end surface of the rotating member 30 abuts against the partition 14, and the partition 14 supports the rotating member 30. The top end surface of the rotating member 30 is spaced from the top plate 13 to prevent the top plate 13 from affecting the rotation of the rotating member 30.

[0138] Each movable unit 22 is provided with a supporting portion 2210, which protrudes outward from the top surface of the movable bracket 221, and along the third direction Z, the top surface of the supporting portion 2210 is located higher than the position of the partition 14, so that the rotating member 30 can be in contact with the supporting portion 2210. The supporting portion 2210 of each movable unit 22 is arranged around the outer peripheral surface of the rotating member 30, and the outer peripheral surface of the rotating member 30 is used to abut the supporting portion 2210, and the force applied by the rotating member 30 to the supporting portion 2210 is greater than the elastic force applied by the elastic member 23 to the movable bracket 221, so as to prevent the movable bracket 221 from approaching the first extrusion wheel 21 under the elastic force of the elastic member 23.

[0139] Furthermore, a groove portion 31 is provided on the outer circumference of the rotating member 30, and the groove portion 31 is recessed inward from the outer circumference of the rotating member 30. The groove portion 31 is used to accommodate the abutting portion 2210, so as to allow the active unit 22 where the abutting portion 2210 is accommodated to be close to the first extrusion wheel 21 to form an extrusion channel 24. When the groove portion 31 accommodates the abutting portion 2210, the rotating member 30 simultaneously abuts against the abutting portions 2210 of the remaining active units 22, so that the second extrusion wheels 222 of the remaining active units 22 are all away from the first extrusion wheel 21.

[0140] It is understandable that the number of the grooves 31 may be one or more. When the number of the grooves 31 is one, the rotating member 30 only allows one second extrusion wheel 222 to approach the first extrusion wheel 21, that is, the multi-consumable extrusion device 100a only extrude consumables of a single color. When the number of the grooves 31 is multiple, the rotating member 30 may allow multiple second extrusion wheels 222 to approach the first extrusion wheel 21, that is, the multi-consumable extrusion device 100a may extrude consumables of multiple colors at the same time.

[0141] In addition, in another embodiment, the number of the first extrusion wheels 21 is three or more. In this case, the rotating member 30 may be provided in an elliptical belt-shaped structure. Along the rotation direction of the rotating member 30, a plurality of protrusions are sequentially provided on the outer peripheral surface of the rotating member 30, and the number of the protrusions is the same as the number of the movable brackets 221, and each protrusion is used to abut against the abutting portion 2210 of a movable bracket 221. A groove portion 31 is recessed on one side of one or more of the protrusions away from the rotating member 30, and the groove portion 31 is used to accommodate a abutting portion 2210, thereby realizing the switching effect of a single rotating member 30 on the extrusion channels 24 of three or more first extrusion wheels 21.

[0142] Please combine again Figures 2 to 4 In this embodiment, the first driving assembly 40 a includes a first driving member 41 and a rotating shaft 42 .

[0143] The first driving member 41 is mounted on one end of the top plate 13 away from the bottom plate 12, and the first driving member 41 is a motor or a motor. One end of the rotating shaft 42 is connected to the driving end of the first driving member 41, and the other end of the rotating shaft 42 is rotatably connected to the top plate 13. The end of the rotating shaft 42 away from the first driving member 41 passes through the top plate 13 and is connected to the rotating member 30. The first driving member 41 drives the rotating member 30 to rotate through the rotating shaft 42, and the rotation direction of the rotating member 30 can be switched by adjusting the forward and reverse directions of the first driving member 41.

[0144] Example 2

[0145] like Figures 5 to 7 As shown, this embodiment provides a multi-consumable material extrusion device 100 b , which includes a mounting frame 10 , at least two first extrusion wheels 21 , a movable unit 22 , a rotating member 30 , a first driving assembly 40 b , and a second driving assembly 50 .

[0146] In this embodiment, the first driving assembly 40 b includes a shifting member 43 and a stop member 44 .

[0147] The toggle member 43 is generally arranged in an "L"-shaped structure, and the toggle member 43 includes a first end 431 and a second end 432. The first end 431 and the second end 432 are arranged perpendicular to each other, and one end of the second end 432 is connected to one end of the first end 431. The second end 432 is integrally formed with the first end 431 or detachably connected. The second end 432 is located on the side of the top plate 13 away from the bottom plate 12, and the second end 432 is used to drive the toggle member 43 to rotate after the second end 432 collides with the support frame 80 during the movement relative to the support frame 80. The first end 431 is rotatably connected to the top plate 13 of the mounting frame 10, and the end of the first end 431 away from the second end 432 passes through the top plate 13 and is connected to the anti-return member 44.

[0148] The anti-return member 44 is transmission-connected to the rotating member 30 and is used for driving the rotating member 30 to rotate in one direction.

[0149] Specifically, a rotation groove 32 is formed on the end surface of the rotating member 30 close to the top plate 13. The anti-return member 44 is accommodated in the rotation groove 32, and includes a central portion 441 and an extension portion 442 connected to the outer peripheral surface of the central portion 441. The central portion 441 is sleeved on the outer peripheral surface of the first end portion 431 and rotates with the first end portion 431. There are multiple extension portions 442, and the multiple extension portions 442 are arranged in sequence around the outer peripheral surface of the central portion 441, and the multiple extension portions 442 are integrally formed with the central portion 441. The extension portion 442 is generally arranged in a curved structure.

[0150] The inner circumferential wall of the rotating groove 32 is provided with a plurality of non-return grooves 33, the number of which is the same as the number of the extension portion 442, and the non-return groove 33 is used to accommodate one end of the extension portion 442 away from the central portion 441. The non-return groove 33 has a first curved surface P1 and a second curved surface P2, and the first curved surface P1 and the second curved surface P2 are arranged at an angle, and the angle between the two is an acute angle. Along the bending direction of the extension portion 442, the first curved surface P1 and the second curved surface P2 both extend inward and forward from the inner circumferential wall of the rotating groove 32, and the second curved surface P2 is located in front of the first curved surface P1. Along the bending direction of the extension portion 442, when the toggle member 43 rotates, it will drive the non-return member 44 to rotate along the bending direction of its extension portion 442, and the extension portion 442 of the non-return member 44 abuts against the second curved surface P2, and then drives the rotating member 30 to rotate synchronously. When the direction of rotation of the toggle member 43 is opposite to the bending direction of the extension portion 442, the extension portion 442 slides along the first curved surface P1 to disengage from the anti-return groove 33. The anti-return member 44 will not apply external force to the rotating member 30 to rotate the rotating member 30 when rotating with the toggle member 43, thereby realizing unidirectional rotation of the rotating member 30.

[0151] Furthermore, the first driving assembly 40b also includes a torsion spring 45. The torsion spring 45 is sleeved on one end of the first end portion 431 that is exposed outside the top plate 13. The top plate 13 is provided with two fixing protrusions 131, and both fixing protrusions 131 are provided with fixing grooves 1310. The two ends of the torsion spring 45 are respectively received in the two fixing grooves 1310, so that the torsion spring 45 can apply elastic force to the toggle member 43, so that when the toggle member 43 collides with the support frame 80, the torsion spring 45 provides a certain elastic force to the toggle member 43 to balance the external force applied to the toggle member 43 when the support frame 80 collides with the toggle member 43, thereby avoiding damage to the toggle member 43. At the same time, the setting of the torsion spring 45 can also provide elastic force to the toggle member 43 to drive the toggle member 43 to reset, so as to facilitate the switching of consumables after the toggle member 43 hits the support frame 80 again.

[0152] In addition to the above structure, the structures and principles of the mounting frame 10, the first extrusion wheel 21, the movable unit 22, the rotating member 30, and the second driving assembly 50 in the multi-consumable material extrusion device 100b of this embodiment 2 are the same as those in embodiment 1 and are not repeated here.

[0153] like Figure 8 See Figure 4 and Figure 5 The embodiment of the present application also provides a print head 200, including a nozzle device 60, and the multi-consumable extrusion device 100a in the above-mentioned embodiment 1 or the multi-consumable extrusion device 100b in embodiment 2. Specifically, the nozzle device 60 is connected to the multi-consumable extrusion device 100a, and the nozzle device 60 is provided with a guide channel 61, the number of the guide channels 61 is the same as the number of the extrusion channels 24 that can be formed by the multi-consumable extrusion device 100a, and the guide channel 61 of the nozzle device 60 is connected to the extrusion channel 24 of the multi-consumable extrusion device 100a, and is used to guide the consumables extruded by the multi-consumable extrusion device 100a through the nozzle device 60 to the molding substrate 70 for molding. Specifically, the bottom plate 12 is provided with a feed hole 122, and the feed hole 122 is connected to the extrusion channel 24 and the guide channel 61.

[0154] like Fig. 9 and Fig.10 See Figure 2 and Figure 4 The embodiment of the present application further provides a 3D printing device 300, including a support frame 80, a molding substrate 70 and the above-mentioned print head 200. The molding substrate 70 is located below the print head 200, and the print head 200 is movably connected to the support frame 80, and the print head 200 can slide relative to the support frame 80 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 70.

[0155] When some implementation methods are adopted, the 3D printing device 300 of this embodiment adopts the multi-consumable extrusion device 100b in Example 2. Specifically, the support frame 80 includes two support bodies 81 and an optical axis 82. Along the second direction Y, the two support bodies 81 are arranged at intervals, the axial direction of the optical axis 82 is parallel to the second direction Y, and the two ends of the optical axis 82 are respectively connected to the two support bodies 81, and the print head 200 is slidably mounted on the optical axis 82 so that the print head 200 can slide along the axial direction of the optical axis 82. Only one of the two supporting bodies 81 uses the impact part 810, and the impact part 810 is used to drive the toggle member 43 to rotate after colliding with the toggle member 43. During the movement of the print head 200 relative to the optical axis 82, each time the print head 200 approaches the impact part 810, the impact part 810 collides with the toggle member 43, causing the toggle member 43 to drive the rotating member 30 to rotate a certain rotation angle. The rotation angle requires the rotating member 30 to rotate until its groove portion 31 accommodates another abutting portion 2210, so that the multi-consumable extrusion device 100a can switch from the currently formed extrusion channel 24 to the extrusion channel 24 of another consumable.

[0156] When other implementations are adopted, the 3D printing device 300 of this embodiment adopts the multi-consumable material extrusion device 100a in Example 1, and the support frame 80 does not need to be provided with the impact part 810.

[0157] It is understandable that the impact portion 810 can be set at other positions of the support frame 80, so that when the print head 200 moves along the first direction X or the third direction Z relative to the support frame 80, the impact portion 810 collides with the toggle member 43, causing the toggle member 43 to drive the rotating member 30 to rotate.

[0158] Furthermore, the 3D printing device 300 further includes a feeding assembly (not shown), which is connected to the feeding end of the multi-consumable extrusion device 100a through a pipe. The feeding assembly can be installed at the proximal end or the distal end of the multi-consumable extrusion device 100a to achieve proximal or distal feeding of the 3D printing device 300.

[0159] 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; At least two first extrusion wheels, at least two of which are arranged in sequence, and the first extrusion wheels are rotatably connected to the mounting frame; A movable unit, wherein at least one side of each of the at least two first extrusion wheels is provided with the movable unit, the movable unit is movably connected to the mounting frame, and can be close to or away from the first extrusion wheel, and the movable unit is used to form an extrusion channel after approaching the first extrusion wheel; a rotating member, the rotating member being configured to allow at least one of the movable units to approach the first extrusion wheel and to hold the remaining movable units away from the first extrusion wheel, the rotating member being rotatably connected to the mounting frame and used to allow different movable units to approach the first extrusion wheel; The first driving assembly is transmission-connected to the rotating member, and the first driving assembly is used to drive the rotating member to rotate.

2. The multi-consumable material extrusion device according to claim 1, characterized in that: The rotating member is provided with a groove portion, and the groove portion is used to at least partially accommodate the movable unit to allow the accommodated movable unit to be close to the first extrusion wheel to form the extrusion channel. When the groove portion accommodates the movable unit, the rotating member holds the remaining movable unit away from the first extrusion wheel.

3. The multi-consumable extrusion device according to claim 2, characterized in that: The movable unit is provided with a supporting portion, and the supporting portion of at least one movable unit is arranged around the outer circumference of the rotating part, the outer circumference of the rotating part is used to support the supporting portion, the groove portion is recessed inward from the outer circumference of the rotating part, and the groove portion is used to accommodate the supporting portion.

4. The multi-consumable material extrusion device according to claim 1, characterized in that: The activity unit comprises: A movable bracket, one end of which is rotatably connected to the mounting bracket, and the other end of which is provided with a supporting portion, and the supporting portion is used to support the rotating member; The second extrusion wheel is rotatably connected to the movable bracket, and the second extrusion wheel is used for transmission connection to the first extrusion wheel, so that the extrusion channel is formed between the first extrusion wheel and the second extrusion wheel.

5. The multi-consumable material extrusion device according to claim 1, characterized in that: The multi-consumable material extrusion device also includes an elastic member, which is provided between each movable unit and the mounting frame, and the two ends of the elastic member are elastically connected to the movable unit and the mounting frame respectively, for applying an elastic force to the movable unit close to the first extrusion wheel.

6. The multi-consumable material extrusion device according to claim 1, characterized in that: The first driving assembly includes a first driving member and a rotating shaft. The rotating shaft is drivingly connected to the first driving member, and the rotating shaft is rotatably connected to the mounting bracket. The rotating member is sleeved on the outer circumference of the rotating shaft.

7. The multi-consumable material extrusion device according to claim 1, characterized in that: The first driving assembly comprises: A toggle member, comprising a first end and a second end, wherein the first end is rotatably connected to the mounting frame, and the second end is used to collide with a support frame of a 3D printing device to provide a driving force for driving the toggle member to rotate; The anti-return member is connected to the toggle member, and the anti-return member is transmission-connected to the rotating member to drive the rotating member to rotate in one direction.

8. The multi-consumable material extrusion device according to claim 1, characterized in that: The multi-consumable material extrusion device further includes a second driving assembly, which is transmission-connected to the at least two first extrusion wheels and is used to drive the at least two first extrusion wheels to rotate synchronously.

9. 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 8, 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.

10. A 3D printing device, characterized in that: It comprises a support frame and a print head as claimed in claim 9, wherein the print head is movably connected to the support frame, and the support frame is used to abut against a driving member of the multi-consumable material extrusion device in a moving state to drive the driving member to rotate.

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