Extrusion assembly, spray head unit applying same and 3D printing equipment

Abstract

The embodiment of the utility model provides an extrusion assembly, a spray head unit applying the extrusion assembly and 3D printing equipment. The extrusion assembly comprises a first support, a second support, a connecting frame and a pair of extrusion wheels. The first bracket comprises a first lug boss; the second support is connected with the first support, the second support comprises second protruding parts, and the second protruding parts and the first protruding parts are arranged at intervals; the connecting frame is movably arranged between the first support and the second support, a containing groove and two mounting holes are formed in the connecting frame, the two mounting holes are located in the two opposite sides of the containing groove respectively, one mounting hole is used for containing the first protruding part, and the other mounting hole is used for containing the second protruding part; the pair of extrusion wheels is arranged between the first support and the second support, and one of the pair of extrusion wheels is arranged in the containing groove and rotationally connected with the connecting frame.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to an extrusion assembly, a nozzle unit using the same, and a 3D printing device. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies special wax materials, powdered metals, plastics, or other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling is one of the main 3D printing technologies. In this technology, a hot-melt filament is heated and melted, then extruded from a nozzle and deposited on a forming platform or the previously solidified material of the previous layer to finally form a physical object.

[0003] Extruding the consumable is a very crucial step in the 3D printing process. If the clamping or transmission of the consumable by the extrusion mechanism is unstable, it will directly lead to unstable transmission and printing of the consumable, and further result in poor printing effects or even failure. How to provide a compact, firm, and reliable extrusion mechanism and a 3D printing device using the same is something that those skilled in the art need to consider. Summary of the Utility Model

[0004] To solve the problems in the prior art, an embodiment of this application provides an extrusion assembly, a nozzle unit using the same, and a 3D printing device.

[0005] An extrusion assembly according to an embodiment of this application includes a first bracket, a second bracket, a connecting frame, and a pair of extrusion wheels. The first bracket includes a first protrusion; the second bracket is connected to the first bracket, and the second bracket includes a second protrusion that is spaced apart from the first protrusion; the connecting frame is movably disposed between the first bracket and the second bracket, the connecting frame is provided with a receiving groove and two mounting holes, the two mounting holes are respectively located on opposite sides of the receiving groove, one mounting hole is for receiving the first protrusion, and the other mounting hole is for receiving the second protrusion; the pair of extrusion wheels is disposed between the first bracket and the second bracket, and one of the pair of extrusion wheels is disposed in the receiving groove and rotatably connected to the connecting frame.

[0006] In one embodiment, the two mounting holes are a first mounting hole and a second mounting hole, the first protrusion is configured to be received in the first mounting hole, the second protrusion is configured to be received in the second mounting hole, the first protrusion and the second protrusion are spaced apart from the pair of extrusion wheels, a connection line between the first mounting hole and the mounting hole is a first axis, and the connecting frame is configured to be able to swing with the first axis as a rotation axis to drive one of the pair of extrusion wheels to approach or move away from the other.

[0007] In one embodiment, the connecting frame includes a first connecting plate, a first connecting arm and a second connecting arm, the first connecting arm and the second connecting arm are respectively connected to the first connecting plate, the first connecting arm and the second connecting arm are located on the same side of the first connecting plate, the first connecting plate, the first connecting arm and the second connecting arm surround the accommodating groove, the first mounting hole is penetrated through the first connecting arm, and the second mounting hole is penetrated through the second connecting arm.

[0008] In one embodiment, one of the pair of extrusion wheels is rotatably connected to the first connecting arm and the second connecting arm and is configured to rotate along a second axis, the first axis is parallel to the second axis, and the second axis is located on a side of the first axis away from the first connecting plate.

[0009] In one embodiment, the extrusion assembly further includes a reset member, the first connecting plate is provided with a third protrusion, the second bracket is provided with a third mounting groove on the side facing the connecting plate, one end of the reset member is sleeved on the outside of the third protrusion, and the other end of the reset member is received in the third mounting groove, the other of the pair of extrusion wheels is connected to the second bracket, and the connecting bracket is used to drive one of the pair of extrusion wheels to move closer to or farther away from the other.

[0010] In one embodiment, the pair of extrusion wheels includes a first extrusion wheel and a second extrusion wheel, the first extrusion wheel and the second extrusion wheel are configured to be able to approach or move away from each other, the first extrusion wheel is arranged in the accommodating groove and connected to the connecting frame, the first extrusion wheel is arranged between the first mounting hole and the second mounting hole, the line connecting the first mounting hole and the second mounting hole passes through the first extrusion wheel, and the second extrusion wheel is connected to the first bracket and the second bracket.

[0011] In one embodiment, the connecting frame is further provided with a third mounting hole and a fourth mounting hole, the third mounting hole and the fourth mounting hole are respectively located on opposite sides of the receiving slot, the extrusion assembly further comprises a first latch, the first latch passes through the connecting frame via the third mounting hole, the receiving slot and the fourth mounting hole, one of the pair of extrusion wheels is sleeved on the outside of the first latch and is rotatably connected to the connecting frame, and the line connecting the third mounting hole and the fourth mounting hole is parallel to the line connecting the first mounting hole and the second mounting hole.

[0012] In one embodiment, a first mounting groove is formed on one side of the first bracket facing the second bracket, and a second mounting groove is formed on one side of the second bracket facing the first bracket. The first mounting groove and the first protrusion are disposed on the same side of the first bracket, and the second mounting groove and the second protrusion are disposed on the same side of the second bracket. The extrusion assembly further includes a second pin. One end of the second pin is disposed in the first mounting groove, and the other end of the second pin is disposed in the second mounting groove. The other one of the pair of extrusion wheels is sleeved and connected to the second pin.

[0013] An embodiment of the present application further provides a nozzle unit, which includes a nozzle assembly and the extrusion assembly as described in any one of the foregoing embodiments, and the nozzle assembly is connected to the extrusion assembly.

[0014] An embodiment of the present application further provides a 3D printing device, which includes a forming platform, a driving component, and the extrusion assembly as described in any one of the foregoing embodiments or the nozzle unit as described above. The driving component drives the nozzle unit to move relative to the forming platform.

[0015] It can be understood that a pair of extrusion wheels are used for extruding consumables. The pair of extrusion wheels are disposed between the first bracket and the second bracket and are limited by the first bracket and the second bracket. One mounting hole is used to accommodate the first protrusion, and the other mounting hole is used to accommodate the second protrusion. The connecting frame is movably disposed between the first bracket and the second bracket. One of the pair of extrusion wheels is disposed in the accommodating groove and is rotatably connected to the connecting frame. The connecting frame can drive one of the pair of extrusion wheels to move. Moreover, the two mounting holes are respectively located on opposite sides of the accommodating groove. Through the cooperation of the first protrusion, the second protrusion and the two mounting holes, the connection between the connecting frame and the extrusion wheel is realized in a relatively small space, and at the same time, the connection between the connecting frame and the first bracket and the second bracket is realized. In addition, the first bracket and the second bracket can limit the connecting frame and the pair of extrusion wheels, making the extrusion assembly structure compact, firm and reliable. Description of the Drawings

[0016] Figure 1 It is a three-dimensional schematic diagram of the extrusion assembly provided by an embodiment of the present application.

[0017] Figure 2 It is a partial three-dimensional schematic diagram of the extrusion assembly provided by an embodiment of the present application.

[0018] Figure 3 It is a three-dimensional schematic diagram of the first bracket of the extrusion assembly provided by an embodiment of the present application.

[0019] Figure 4 It is a three-dimensional schematic diagram of the second bracket of the extrusion assembly provided by an embodiment of the present application.

[0020] Figure 5Schematic perspective view of the connecting frame of the extrusion assembly provided by the embodiment of the present application.

[0021] Figure 6 Partial schematic perspective view of the extrusion assembly provided by the embodiment of the present application.

[0022] Figure 7 Partial schematic perspective view of the extrusion assembly provided by the embodiment of the present application.

[0023] Figure 8 Partial schematic perspective view of the extrusion assembly provided by the embodiment of the present application.

[0024] Figure 9 Schematic perspective view of the nozzle unit provided by the embodiment of the present application.

[0025] Figure 10 Schematic perspective view of the 3D printing device provided by the embodiment of the present application.

[0026] Description of main element symbols

[0027] Extrusion assembly 10

[0028] Transport channel 100

[0029] First bracket 11

[0030] First protrusion 111

[0031] First main body part 112

[0032] First connecting rod 113

[0033] First installation groove 114

[0034] Second coordination hole 115

[0035] Third coordination hole 116

[0036] Second bracket 12

[0037] Second protrusion 121

[0038] Second main body part 122

[0039] Second connecting rod 123

[0040] Third connecting rod 124

[0041] Second installation groove 125

[0042] First coordination hole 126

[0043] Third installation groove 127

[0044] Connecting frame 13

[0045] Receiving groove 1301

[0046] Mounting hole 1302

[0047] First connecting arm 131

[0048] First mounting hole 1311

[0049] Third mounting hole 1313

[0050] Second connecting arm 132

[0051] Second mounting hole 1322

[0052] Fourth mounting hole 1324

[0053] First connecting plate 133

[0054] Second connecting plate 134

[0055] Third protrusion 135

[0056] First plug 141

[0057] Second plug 142

[0058] Pair of extrusion wheels 15

[0059] First extrusion wheel 151

[0060] Second extrusion wheel 152

[0061] Reset member 16

[0062] Drive motor 17

[0063] Receiving space 18

[0064] First axis M1

[0065] Second axis M2

[0066] Nozzle unit 1

[0067] Nozzle assembly 19

[0068] 3D printing device 2

[0069] Forming platform 21

[0070] Drive assembly 22

[0071] The following specific embodiments will further illustrate the present application in conjunction with the above drawings. Specific embodiments

[0072] The following description will describe the content of the present application more comprehensively with reference to the accompanying drawings. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as 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 denote the same or similar components. The terms used herein are for the purpose of describing particular exemplary embodiments only 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 include the plural forms as well. Further, when used herein, "comprising" and / or "including" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Further, terms such as those defined in a general dictionary should be construed to have a meaning consistent with their meaning in the relevant art and the content of the present application, and will not be construed as idealized or overly formal meanings.

[0073] Generally, 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies adhesives such as special wax materials, powdered metals, or plastics to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling is one of the main 3D printing technologies. This technology melts the hot melt filament and extrudes it from the nozzle, depositing it on the forming platform or the previously cured material of the previous layer to finally generate a physical object. Extruding the consumable is a very crucial step in the 3D printing process. If the extrusion mechanism is unstable in clamping or transporting the consumable, it will directly lead to unstable transmission and printing of the consumable, and further result in poor printing effects or even failure. How to provide an extrusion mechanism with a compact structure, firmness and reliability and a 3D printing device applying the same is something that those skilled in the art need to consider.

[0074] Correspondingly, an embodiment of the present application provides an extrusion assembly, a nozzle unit and a 3D printing device applying the same. The extrusion assembly includes a first bracket, a second bracket, a connecting frame and a pair of extrusion wheels. The first bracket includes a first convex portion; the second bracket is connected to the first bracket, the second bracket includes a second convex portion, and the second convex portion is spaced from the first convex portion; the connecting frame is movably disposed between the first bracket and the second bracket, the connecting frame is provided with a receiving groove and two mounting holes, the two mounting holes are respectively located on opposite sides of the receiving groove, one mounting hole is for receiving the first convex portion, and the other mounting hole is for receiving the second convex portion; a pair of extrusion wheels are disposed between the first bracket and the second bracket, and one of the pair of extrusion wheels is disposed in the receiving groove and rotatably connected to the connecting frame.

[0075] Furthermore, a pair of extrusion wheels are used for extruding consumables, and the pair of extrusion wheels are disposed between the first bracket and the second bracket and are limited by the first bracket and the second bracket. One mounting hole is for receiving the first convex portion, and the other mounting hole is for receiving the second convex portion. The connecting frame is movably disposed between the first bracket and the second bracket. One of the pair of extrusion wheels is disposed in the receiving groove and rotatably connected to the connecting frame. The connecting frame can drive one of the pair of extrusion wheels to move; and the two mounting holes are respectively located on opposite sides of the receiving groove. Through the cooperation of the first convex portion, the second convex portion and the two mounting holes, the connection between the connecting frame and the extrusion wheel is realized in a relatively small space, and at the same time, the connection between the connecting frame and the first bracket and the second bracket is realized. Moreover, the first bracket and the second bracket can limit the connecting frame and the pair of extrusion wheels, making the extrusion assembly compact, firm and reliable.

[0076] Those skilled in the art can understand that "3D printing" refers to a technology that constructs an object by layer-by-layer printing based on a digital model file and using powdery metals, plastics or other bondable materials.

[0077] The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be denoted by the same or similar reference numerals or similar technical terms.

[0078] The following will refer to the accompanying drawings to further describe the specific embodiments of the present application in detail.

[0079] As Figures 1 to 8As shown in the figure, an extrusion assembly 10 according to an embodiment of the present application has a transmission channel 100 for transmitting consumables (not shown in the figure). The extrusion assembly 10 includes a first bracket 11, a second bracket 12, a connecting frame 13, and a pair of extrusion wheels 15. The first bracket 11 is connected to the second bracket 12, and the connecting frame 13 and the pair of extrusion wheels 15 are disposed between the first bracket 11 and the second bracket 12. The pair of extrusion wheels 15 includes a first extrusion wheel 151 and a second extrusion wheel 152. The first extrusion wheel 151 is connected to the connecting frame 13, and the second extrusion wheel 152 is connected to the first bracket 11 and the second bracket 12. The first extrusion wheel 151 and the second extrusion wheel 152 are respectively located on opposite sides of the transmission channel 100. By driving the connecting frame 13, the first extrusion wheel 151 is moved closer to or away from the second extrusion wheel 152 to clamp or loosen the consumables located in the transmission channel 100.

[0080] In one embodiment, the first bracket 11 includes a first protrusion 111; the second bracket 12 is connected to the first bracket 11, and the second bracket 12 includes a second protrusion 121 spaced apart from the first protrusion 111; the connecting frame 13 is movably disposed between the first bracket 11 and the second bracket 12. The connecting frame 13 is provided with a receiving groove 1301 and two mounting holes 1302, and the two mounting holes 1302 are respectively located on opposite sides of the receiving groove 1301. One mounting hole 1302 is used to receive the first protrusion 111, and the other mounting hole 1302 is used to receive the second protrusion 121; the pair of extrusion wheels 15 is disposed between the first bracket 11 and the second bracket 12, and one of the pair of extrusion wheels 15 is disposed in the receiving groove 1301 and rotatably connected to the connecting frame 13.

[0081] It can be understood that the pair of extrusion wheels 15 is used to extrude the consumables, and the pair of extrusion wheels 15 is disposed between the first bracket 11 and the second bracket 12 and is limited by the first bracket 11 and the second bracket 12. One mounting hole 1302 is used to receive the first protrusion 111, and the other mounting hole 1302 is used to receive the second protrusion 121. The connecting frame 13 is movably disposed between the first bracket 11 and the second bracket 12, and one of the pair of extrusion wheels 15 is disposed in the receiving groove 1301 and rotatably connected to the connecting frame 13. The connecting frame 13 can drive one of the pair of extrusion wheels 15 to move; and the two mounting holes 1302 are respectively located on opposite sides of the receiving groove 1301. Through the cooperation of the first protrusion 111, the second protrusion 121 and the two mounting holes 1302, the connection between the connecting frame 13 and the pair of extrusion wheels 15 is realized in a relatively small space, and the connection between the connecting frame 13 and the first bracket 11 and the second bracket 12 is also realized. Moreover, the first bracket 11 and the second bracket 12 can limit the connecting frame 13 and the pair of extrusion wheels 15, making the extrusion assembly 10 compact and reliable.

[0082] In one embodiment, the first bracket 11 and the second bracket 12 are two interconnected load-bearing structures in the extrusion assembly 10. The first bracket 11 includes a connected first main body portion 112 and a first connecting rod 113. A first protruding portion 111 is provided on the surface of the first main body portion 112. The first connecting rod 113 and the first protruding portion 111 are on the same side of the first main body portion 112 and protrude in the same direction. The protruding height of the first connecting rod 113 is greater than the protruding height of the first protruding portion 111. The second bracket 12 includes a connected second main body portion 122, a second connecting rod 123, and a third connecting rod 124. A second protruding portion 121 is provided on the surface of the second main body portion 122. The second connecting rod 123, the third connecting rod 124, and the second protruding portion 121 are on the same side of the second main body portion 122 and protrude in the same direction. The protruding heights of the second connecting rod 123 and the third connecting rod 124 are respectively greater than the protruding height of the second protruding portion 121.

[0083] In one embodiment, the first main body portion 112 and the second main body portion 122 are spaced apart. The first protruding portion 111 is provided on the side of the first main body portion 112 facing the second main body portion 122. The second protruding portion 121 is provided on the side of the first main body portion 112 facing the first main body portion 112, and the first protruding portion 111 and the second protruding portion 121 are spaced apart.

[0084] In this embodiment, the first connecting rod 113 extends to the side surface of the second main body portion 122. The first main body portion 112 and the second main body portion 122 are on the same side of the first connecting rod 113. A first coordination hole 126 is formed in the side surface of the second main body portion 122. The first coordination hole 126 corresponds to the first connecting rod 113 for connecting the first connecting rod 113 and the second main body portion 122 through a bolt (not shown in the figure). The second connecting rod 123 and the third connecting rod 124 abut against the surface of the first main body portion 112 where the first protruding portion 111 is provided. The first main body portion 112 is provided with a second coordination hole 115 and a third coordination hole 116. The second coordination hole 115 corresponds to the second connecting rod 123 for connecting the second connecting rod 123 and the first main body portion 112 through a bolt (not shown in the figure). The third coordination hole 116 corresponds to the third connecting rod 124 for connecting the third connecting rod 124 and the first main body portion 112 through a bolt (not shown in the figure).

[0085] It can be understood that the first main body portion 112 and the second main body portion 122 are connected by the first connecting rod 113, the second connecting rod 123, and the third connecting rod 124, and further a receiving space 18 that can accommodate a pair of extrusion wheels 15 and a connecting frame 13 is constructed between the first main body portion 112 and the second main body portion 122. The transmission channel 100 is arranged to pass through the extrusion assembly 10 from the receiving space 18.

[0086] In one embodiment, the two mounting holes 1302 include a first mounting hole 1311 and a second mounting hole 1322. The first protruding portion 111 is configured to be received in the first mounting hole 1311, and the second protruding portion 121 is configured to be received in the second mounting hole 1322. The first protruding portion 111 and the second protruding portion 121 are spaced apart from a pair of extrusion wheels 15. The line connecting the first mounting hole 1311 and the second mounting hole 1322 is a first axis M1. The connecting frame 13 is configured to be able to swing about the first axis M1 to drive one of the pair of extrusion wheels 15 to approach or move away from the other one.

[0087] In one embodiment, the connecting frame 13 includes a first connecting plate 133, a first connecting arm 131, and a second connecting arm 132. The first connecting arm 131 and the second connecting arm 132 are respectively connected to the first connecting plate 133, and the first connecting arm 131 and the second connecting arm 132 are located on the same side of the first connecting plate 133. The first connecting plate 133, the first connecting arm 131, and the second connecting arm 132 enclose a receiving groove 1301. The first mounting hole 1311 is formed through the first connecting arm 131, and the second mounting hole 1322 is formed through the second connecting arm 132.

[0088] In this embodiment, the connecting frame 13 further includes a second connecting plate 134. The first connecting arm 131 and the second connecting arm 132 are respectively connected to the second connecting plate 134. The first connecting arm 131 and the second connecting arm 132 are located on the same side of the second connecting plate 134, and the first connecting plate 133 and the second connecting plate 134 are located on opposite sides of the first connecting arm 131 and the second connecting arm 132. The first connecting plate 133, the first connecting arm 131, the second connecting plate 134, and the second connecting arm 132 are sequentially connected end to end to enclose and define the receiving groove 1301.

[0089] In one embodiment, a pair of extrusion wheels 15 includes a first extrusion wheel 151 and a second extrusion wheel 152. The first extrusion wheel 151 and the second extrusion wheel 152 are configured to be able to approach or move away from each other. The first extrusion wheel 151 is disposed in the receiving groove 1301 and connected to the connecting frame 13. The first extrusion wheel 151 is disposed between the first mounting hole 1311 and the second mounting hole 1322. The line connecting the first mounting hole 1311 and the second mounting hole 1322 passes through the first extrusion wheel 151. The second extrusion wheel 152 is connected to the first bracket 11 and the second bracket 12.

[0090] In this embodiment, the first extrusion wheel 151 is connected to the connecting frame 13, and the two are located on the same side of the transmission channel 100. The second extrusion wheel 152 is located on the other side of the transmission channel 100. The straight line where the rotation axis of the first extrusion wheel 151 is located passes through the first connecting arm 131 and the second connecting arm 132, and the first extrusion wheel 151 separates the first mounting hole 1311 and the second mounting hole 1322.

[0091] In one embodiment, the connecting frame 13 is further provided with a third mounting hole 1313 and a fourth mounting hole 1324, and the third mounting hole 1313 and the fourth mounting hole 1324 are respectively located on opposite sides of the receiving groove 1301. The extrusion assembly 10 further includes a first latch 141, which penetrates the connecting frame 13 via the third mounting hole 1313, the receiving groove 1301 and the fourth mounting hole 1324. One of the pair of extrusion wheels 15 is sleeved on the outside of the first latch 141 and is rotatably connected to the connecting frame 13. The line connecting the third mounting hole 1313 and the fourth mounting hole 1324 is parallel to the line connecting the first mounting hole 1311 and the second mounting hole 1322.

[0092] It can be understood that by reasonably setting the positions of the first mounting hole 1311, the second mounting hole 1322, the third mounting hole 1313 and the fourth mounting hole 1324, and matching the first protrusion 111 and the second protrusion 121 with a smaller protrusion height, and the flat first extrusion wheel 151 and the second extrusion wheel 152, the first axis M1 overlaps with the area where the first extrusion wheel 151 is located, so that the extrusion assembly 10 has a compact structure.

[0093] In one embodiment, the extrusion assembly 10 further includes a reset member 16, the first connecting plate 133 is provided with a third protrusion 135, the second bracket 12 is provided with a third mounting groove 127 on the side facing the connecting plate, one end of the reset member 16 is sleeved on the outside of the third protrusion 135, and the other end of the reset member 16 is received in the third mounting groove 127. The other of the pair of extrusion wheels 15 is connected to the second bracket 12, and the connecting frame 13 is used to drive one of the pair of extrusion wheels 15 to move closer to or farther from the other.

[0094] In one embodiment, one of the pair of extrusion wheels 15 is rotatably connected to the first connecting arm 131 and the second connecting arm 132 and is configured to rotate along a second axis M2, the first axis M1 is parallel to the second axis M2, and the second axis M2 is located on the side of the first axis M1 away from the first connecting plate 133.

[0095] In this embodiment, the third protrusion 135 and the first extrusion wheel 151 are located on the same side of the transmission channel 100, and the reset member 16 is disposed between the first connecting plate 133 and the third protrusion 135. The reset member 16 may be a spring, and the reset member 16 is configured to be in a compressed state. The reset member 16 pushes the first connecting plate 133 to move toward a side away from the third protrusion 135, and the first connecting plate 133 drives the first connecting arm 131 and the second connecting arm 132 to rotate about the first axis M1, so that the first connecting arm 131 and the second connecting arm 132 drive the first extrusion wheel 151 to approach the second extrusion wheel 152.

[0096] In this embodiment, the second connecting plate 134 extends out of the accommodating space 18. The second connecting plate 134 is used to be pushed so as to drive the first connecting arm 131 and the second connecting arm 132 to rotate about the first axis M1, and the first connecting arm 131 and the second connecting arm 132 drive the first extrusion wheel 151 away from the second extrusion wheel 152.

[0097] In one embodiment, a first installation groove 114 is formed on one side of the first bracket 11 facing the second bracket 12, and a second installation groove 125 is formed on one side of the second bracket 12 facing the first bracket 11. The first installation groove 114 and the first protrusion 111 are arranged on the same side of the first bracket 11, and the second installation groove 125 and the second protrusion 121 are arranged on the same side of the second bracket 12. The extrusion assembly 10 further includes a second pin 142. One end of the second pin 142 is arranged in the first installation groove 114, and the other end of the second pin 142 is arranged in the second installation groove 125. The other one of the pair of extrusion wheels 15 is sleeved and connected with the second pin 142.

[0098] In this embodiment, the first extrusion wheel 151 is sleeved on the first pin 141 and connected with the connecting frame 13, and the second extrusion wheel 152 is sleeved on the second pin 142 and connected with the first bracket 11 and the second bracket 12. The connecting frame 13 is movably connected with the first bracket 11 and the second bracket 12 through the first protrusion 111 and the second protrusion 121. By driving the connecting frame 13, the first extrusion wheel 151 can be driven to approach or move away from the second extrusion wheel 152. Moreover, the first extrusion wheel 151 can rotate relative to the first pin 141, and the second extrusion wheel 152 can rotate relative to the second pin 142, so that the first extrusion wheel 151 and the second extrusion wheel 152 can cooperate with each other to realize the extrusion of the consumable.

[0099] In one embodiment, the extrusion assembly 10 further includes a driving motor 17. The driving motor 17 is connected with the second bracket 12. The second extrusion wheel 152 serves as a driving wheel and is fixed to the second bracket 12 and is drivingly connected with the driving motor 17. The first extrusion wheel 151 serves as a driven wheel and is connected with the connecting frame 13. The driving motor 17 can be a known and feasible structure and will not be elaborated herein.

[0100] Further combined with Figure 9 As shown, the embodiment of the present application further provides a nozzle unit 1, which includes a nozzle assembly 19 and the extrusion assembly 10 in any one of the foregoing embodiments. The nozzle assembly 19 is connected with the extrusion assembly 10, and the transmission channel 100 further penetrates through the nozzle assembly 19.

[0101] Further combined with Figure 10As shown, an embodiment of the present application further provides a 3D printing device 2, which includes a forming platform 21 and a driving component 22, and an extrusion component 10 as described in any one of the foregoing embodiments, or the nozzle unit 1 as described above. The driving component 22 drives the nozzle unit 1 to move relative to the forming platform 21.

[0102] In the foregoing, specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. An extrusion component, characterized in that: include: A first bracket including a first protrusion; A second bracket connected to the first bracket, the second bracket comprising a second protrusion, the second protrusion being spaced apart from the first protrusion; A connecting frame, which is movably disposed between the first bracket and the second bracket, the connecting frame is provided with a receiving slot and two mounting holes, the two mounting holes are respectively located on opposite sides of the receiving slot, one mounting hole is used to receive the first protrusion, and the other mounting hole is used to receive the second protrusion; A pair of extrusion wheels is arranged between the first bracket and the second bracket, and one of the pair of extrusion wheels is arranged in the accommodating groove and is rotatably connected to the connecting frame.

2. The extrusion assembly according to claim 1, characterized in that The two mounting holes are a first mounting hole and a second mounting hole, the first protrusion is configured to be accommodated in the first mounting hole, the second protrusion is configured to be accommodated in the second mounting hole, the first protrusion and the second protrusion are spaced apart from the pair of extrusion wheels, a line connecting the first mounting hole and the mounting holes is a first axis, and the connecting frame is configured to be able to swing with the first axis as a rotating shaft to drive one of the pair of extrusion wheels to be closer to or farther away from the other.

3. The extrusion assembly according to claim 2, characterized in that The connecting frame includes a first connecting plate, a first connecting arm and a second connecting arm, the first connecting arm and the second connecting arm are respectively connected to the first connecting plate, the first connecting arm and the second connecting arm are located on the same side of the first connecting plate, the first connecting plate, the first connecting arm and the second connecting arm surround the accommodating groove, the first mounting hole is penetrated through the first connecting arm, and the second mounting hole is penetrated through the second connecting arm.

4. The extrusion assembly according to claim 3, characterized in that One of the pair of extrusion wheels is rotatably connected to the first connecting arm and the second connecting arm and is configured to rotate along a second axis, wherein the first axis is parallel to the second axis and the second axis is located on a side of the first axis away from the first connecting plate.

5. The extrusion assembly according to claim 3, characterized in that The extrusion assembly also includes a reset member, the first connecting plate is provided with a third protrusion, the second bracket is provided with a third installation groove on the side facing the connecting plate, one end of the reset member is sleeved on the outside of the third protrusion, and the other end of the reset member is accommodated in the third installation groove, the other of the pair of extrusion wheels is connected to the second bracket, and the connecting frame is used to drive one of the pair of extrusion wheels to move closer to or away from the other.

6. The extrusion assembly according to claim 2, characterized in that The pair of extrusion wheels includes a first extrusion wheel and a second extrusion wheel, the first extrusion wheel and the second extrusion wheel are constructed to be able to approach or move away from each other, the first extrusion wheel is arranged in the accommodating groove and connected to the connecting frame, the first extrusion wheel is arranged between the first mounting hole and the second mounting hole, the connecting line between the first mounting hole and the second mounting hole passes through the first extrusion wheel, and the second extrusion wheel is connected to the first bracket and the second bracket.

7. The extrusion assembly according to claim 2, characterized in that The connecting frame is further provided with a third mounting hole and a fourth mounting hole, the third mounting hole and the fourth mounting hole are respectively located on opposite sides of the accommodating groove, the extrusion assembly further comprises a first latch, the first latch passes through the connecting frame via the third mounting hole, the accommodating groove and the fourth mounting hole, one of the pair of extrusion wheels is sleeved on the outside of the first latch and is rotatably connected to the connecting frame, and a line connecting the third mounting hole and the fourth mounting hole is parallel to a line connecting the first mounting hole and the second mounting hole.

8. The extrusion assembly according to claim 1, characterized in that The first bracket is provided with a first mounting groove on a side facing the second bracket, and the second bracket is provided with a second mounting groove on a side facing the first bracket, the first mounting groove and the first protrusion are provided on the same side of the first bracket, and the second mounting groove and the second protrusion are provided on the same side of the second bracket, and the extrusion assembly also includes a second latch, one end of the second latch is provided in the first mounting groove, and the other end of the second latch is provided in the second mounting groove, and the other of the pair of extrusion wheels is sleeved and connected with the second latch.

9. A nozzle unit, characterized in that: It comprises a nozzle assembly and an extrusion assembly as claimed in any one of claims 1 to 8, wherein the nozzle assembly is connected to the extrusion assembly.

10. A 3D printing device, characterized in that: It comprises a molding platform and a driving assembly, and an extrusion assembly as described in any one of claims 1 to 8, or a nozzle unit as described in claim 9, wherein the driving assembly drives the nozzle unit to move relative to the molding platform.

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