Granule discharging mechanism and three-dimensional printer

Abstract

The utility model relates to a granular material discharging mechanism and a three-dimensional printer, and the granular material discharging mechanism comprises a material barrel assembly which defines a containing cavity used for containing granular materials; the discharging pipeline assembly is connected to the material barrel assembly, a pipe cavity communicated with the containing cavity is defined by the discharging pipeline assembly, and the pipe cavity is used for providing a path from the containing cavity to the printing head; the vibration assembly is installed on the discharging pipeline assembly and used for vibrating the discharging pipeline assembly. The situation that the particles cannot enter the printing head during discharging can be reduced.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and in particular to a granular material feeding mechanism and a 3D printer. Background Technology

[0002] A stereo printer, also known as a 3D printer or three-dimensional printer, is a device that uses consumables to construct 3D models. The consumables can be granular, which are fed into the print head of the stereo printer for stereo printing. In developing this application, the inventors discovered at least the following problem in the related technology: granular material may fail to enter the print head during feeding. Utility Model Content

[0003] This application provides a granular material feeding mechanism and a 3D printer, which can reduce the occurrence of granular material failing to enter the print head during feeding.

[0004] In a first aspect, the granular material feeding mechanism provided in the embodiments of this application is applied to a stereo printer, the stereo printer including a print head for receiving granular material, and the granular material feeding mechanism including:

[0005] A hopper assembly defines a receiving cavity for containing the granular material;

[0006] A feeding pipe assembly is connected to the material barrel assembly and defines a cavity communicating with the receiving cavity, the cavity being used to provide a path for the granular material from the receiving cavity to the print head;

[0007] A vibration assembly is installed on the feeding pipe assembly and is used to vibrate the feeding pipe assembly.

[0008] In some embodiments, the pellet feeding mechanism further includes:

[0009] A detection component is installed on the feed pipe assembly.

[0010] In some embodiments, the pellet feeding mechanism further includes:

[0011] A first controller is installed in the feeding pipe assembly;

[0012] A first cable connects the first controller and the detection component;

[0013] The second cable connects the first controller and the vibration component.

[0014] In some embodiments, the vibration assembly includes:

[0015] A vibration motor is installed in the feeding pipe assembly, and the vibration motor includes an output shaft;

[0016] A cam, fixedly mounted on the output shaft, is used to vibrate the feed pipe assembly.

[0017] In some embodiments, the vibration assembly further includes:

[0018] The second controller is connected to the vibration motor, and the second controller and the first controller are connected via the second cable.

[0019] In some embodiments, the upper end of the feeding pipe assembly is connected to the material bucket assembly, and the lower end of the feeding pipe assembly is used to connect to the print head; or

[0020] The vibration assembly is installed at the upper end of the feeding pipe assembly; or

[0021] The vibration assembly is installed outside the cavity.

[0022] In some embodiments, the feeding pipe assembly includes a first connector, a pipe body, and a second connector connected in sequence, the first connector being connected to the material bucket assembly, and the second connector being used to connect to the print head;

[0023] The vibration component is connected to the first connector.

[0024] In some embodiments, the first connector and the tube body are detachably connected; or

[0025] The tube body and the second connector are detachably connected; or

[0026] The first connector and the tube body are detachably connected, and the tube body and the second connector are detachably connected.

[0027] In some embodiments, the first connector has a first cavity connecting the bucket assembly and the tube, the cross-sectional area of ​​the first cavity gradually decreasing from the bucket assembly to the tube.

[0028] In some embodiments, the hopper assembly includes an openable and closable hopper body and a first cover body, the hopper body and the first cover body surrounding the receiving cavity.

[0029] In some embodiments, the outer surface of the feed pipe assembly has a protrusion defining a mounting hole for mounting the vibration assembly.

[0030] In some embodiments, the mounting hole has a first opening, and the pellet feeding mechanism further includes a support member connected to the protrusion, the support member closing the first opening, and the support member supporting the vibration assembly; and / or

[0031] The mounting hole has a second opening, and the granular material feeding mechanism further includes a second cover, which is movably connected to the protrusion and is used to open and close the second opening.

[0032] Secondly, the stereo printer provided in the embodiments of this application includes:

[0033] ontology;

[0034] The printhead is movably mounted on the main body;

[0035] The granular material feeding mechanism provided in any of the above embodiments has a feeding pipe assembly connected to the print head.

[0036] One of the above technical solutions has the following advantages or beneficial effects: the vibration component is installed on the feeding pipe component, thereby vibrating the feeding pipe component, so that the granules blocked in the feeding pipe component can be shaken open, so that the granules can enter the print head, reducing the occurrence of granules not being able to enter the print head during feeding. Attached Figure Description

[0037] Figure 1 This is a partial explosion diagram of the pellet feeding mechanism in an embodiment of this application;

[0038] Figure 2 for Figure 1 A magnified view of a portion of the A structure;

[0039] Figure 3 This is a partial structural diagram of the pellet feeding mechanism in an embodiment of this application;

[0040] Figure 4 for Figure 3 BB cross-sectional view;

[0041] Figure 5 for Figure 4 A magnified view of a portion of the C-structure;

[0042] Figure 6 for Figure 4 A magnified view of a local D-structure;

[0043] Figure 7 for Figure 4 A magnified view of the local E-structure;

[0044] Figure 8 for Figure 3The left view;

[0045] Figure 9 for Figure 8 Enlarged cross-sectional view of the FF structure;

[0046] Wherein: 1-Bug assembly (101-Receiving cavity, 102-Bug body, 103-Fixed plate, 104-Movable plate, 105-Assembly chamber, 106-Viewing window, 107-Scale line, 108-First cover, 109-Hinge, 110-First docking plate, 111-Second docking plate), 2-Discharge pipe assembly (201-First connector (2011-First cavity, 2012-Body, 2013-Flange, 2014-Mounting hole (20141-First opening, 20142-Second opening)). 201-Second opening), 2015-Protrusion), 202-Pipe body (2021-Cavity), 203-Second connector (2031-Second cavity), 204-Unloading valve), 3-Vibration assembly (301-Vibration motor (3011-Output shaft), 302-Cam), 4-Detection assembly (401-Material breakage detection switch), 5-Print head (501-Material cylinder), 6-Second controller, 7-Second cable, 8-First controller, 9-First cable, 10-Second cover, 11-Fixing component, 12-Support component. Detailed Implementation

[0047] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0048] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0049] Unless otherwise defined, all 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. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0050] Please refer to Figures 1 to 9This application embodiment describes a pellet feeding mechanism applied to a 3D printer. The 3D printer includes a printhead 5 for receiving pellets. The pellet feeding mechanism includes a feed hopper assembly 1, a feeding pipe assembly 2, and a vibration assembly 3. The feed hopper assembly 1 defines a receiving cavity 101 for storing pellets. The feeding pipe assembly 2 is connected to the feed hopper assembly 1 and defines a tube 2021 that communicates with the receiving cavity 101. The tube 2021 provides a path for the pellets from the receiving cavity 101 to the printhead 5, allowing the pellets in the receiving cavity 101 to be transported to the printhead 5 via the feeding pipe assembly 2. The vibration assembly 3 is installed on the feeding pipe assembly 2 and vibrates the feeding pipe assembly 2, causing the pellets to enter the feed hopper 501 of the printhead 5, achieving smooth feeding.

[0051] In this embodiment, the vibration component 3 is installed on the feeding pipe component 1, which can vibrate the feeding pipe component 1 more directly and effectively, so that the granules blocked in the feeding pipe component 1 can be fully shaken open, and then the granules can enter the print head 5, reducing the occurrence of the situation where the granules cannot enter the print head 5 during feeding.

[0052] It should be noted that the print head 5 in this embodiment is existing technology and is not limited here.

[0053] In some embodiments, the feeding pipe assembly 2 has an upper end and a lower end that are arranged opposite to each other, the upper end of the feeding pipe assembly 2 is connected to the material bucket assembly 1, and the lower end of the feeding pipe assembly 2 is connected to the print head 5.

[0054] In some embodiments, the granular material feeding mechanism further includes a detection component 4, which is installed on the feeding pipe assembly 2. The detection component 4 is used to detect whether granular material is passing through the feeding pipe assembly 2. For example, the detection component 4 is installed at the lower end of the feeding pipe assembly 2, and can detect whether granular material is passing through the lower end of the feeding pipe assembly 2. In use, the detection component 4 can be used to detect whether granular material is passing through the lower end of the feeding pipe assembly 2. If no granular material is passing through the lower end of the feeding pipe assembly 2, the vibration component 3 can be activated to vibrate the granular material in the feeding pipe assembly 2, allowing the granular material to enter the print head 5, thereby quickly and effectively feeding the granular material. When granular material has passed through the feeding pipe assembly 2 or the vibration component 3 has worked for a preset time, the vibration component 3 can be stopped, reducing operating costs and making it more environmentally friendly.

[0055] As an example, please refer to Figure 7The detection component 4 may include a material breakage detection switch 401, which can be a sensor. For example, the material breakage detection switch 401 can be an infrared sensor or a through-beam sensor. Alternatively, the material breakage detection switch 401 can also be other types of sensors, which can be set according to the actual situation, and will not be elaborated here.

[0056] In one implementation, the detection component 4 can be configured such that after detecting that no granular material passes through the lower end of the feeding pipe component 2, the detection component 4 triggers the vibration component 3 to vibrate for a preset time.

[0057] The preset duration can be, but is not limited to, 10 seconds, 15 seconds, 20 seconds, 25 seconds, 30 seconds, 35 seconds, or 40 seconds, etc. The specific duration can be set according to the actual situation, which will not be elaborated here.

[0058] As an example, the vibration component 3 can vibrate for 30 seconds and then stop. If the detection component 4 still does not detect the granular material passing through the lower end of the feeding pipe component 2 after the vibration component 3 has vibrated for 30 seconds, the detection component 4 will trigger the vibration component 3 to vibrate again for 30 seconds, and so on, until the detection component 4 detects that granular material has passed through the lower end of the feeding pipe component 2.

[0059] As one implementation method, please refer to Figure 2 The granular material feeding mechanism may further include a first controller 8, a first cable 9, and a second cable 7. The first controller 8 is installed on the feeding pipe assembly 2, connected to the detection assembly 4 via the first cable 9, and also connected to the vibration assembly 3 via the second cable 7. As an example, the first controller 8 may be directly installed on the feeding pipe assembly 2. Alternatively, the first controller 8 may be indirectly installed on the feeding pipe assembly 2, for example, on the printhead 5.

[0060] As one implementation method, please refer to Figure 2 and Figure 9 The vibration assembly 3 may include a vibration motor 301 and a cam 302. The vibration motor 301 is mounted on the feeding pipe assembly 2 and includes an output shaft 3011. The cam 302 is fixedly mounted on the output shaft 3011 and contacts the feeding pipe assembly 2. When the vibration motor 301 drives the cam 302 to vibrate, the cam 302 can vibrate the feeding pipe assembly 2.

[0061] As one implementation method, please refer to Figure 2 and Figure 9 The vibration assembly 3 may also include a second controller 6. The second controller 6 is electrically connected to the vibration motor 301, and the second controller 6 is connected to the first controller 8 via a second cable 7.

[0062] The working principle of this embodiment is as follows: when the detection component 4 detects that no granular material passes through the lower end of the feeding pipe component 2, the detection component 4 feeds back the material cut-off signal to the first controller 8. After receiving the material cut-off signal, the first controller 8 transmits a control signal to the second controller 6, and the second controller 6 controls the vibration motor 301 to start vibrating.

[0063] It should be noted that the first controller 8, the second controller 6, and the related control principles in this embodiment are all existing technologies and will not be described in detail here.

[0064] In other embodiments, the vibration component 3 can be kept vibrating continuously, and the detection component 4 can be used to continuously detect whether there is a continuous flow of granular material passing through the lower end of the feeding pipe component 2. This not only ensures that the granular material is continuously supplied, but also enables real-time monitoring.

[0065] It is understood that the specific working method of the vibration component 3 includes, but is not limited to, the above-described implementation method, and can be set according to the actual situation, which will not be elaborated here.

[0066] In some implementation methods, please refer to Figure 2 The vibration component 3 is installed at the upper end of the feeding pipe component 2. It can not only vibrate the feeding pipe component 2 so that the granules in the feeding pipe component 2 can smoothly enter the print head 5, but also drive the material bucket component 1 to vibrate so that the granules in the material bucket component 1 can smoothly enter the feeding pipe component 2.

[0067] It should be noted that in other embodiments, the vibration component 3 can be set in the middle of the feeding pipe component 2, or the vibration component 3 can be set near the lower end of the feeding pipe component 2, or the vibration component 3 can be set at a position in the feeding pipe component 2 where material is easily blocked. It can be set according to the actual situation, and will not be elaborated here.

[0068] In some implementation methods, please refer to Figure 2 and Figure 9 The vibration component 3 is installed outside the feeding pipe component 2, which not only facilitates the maintenance and replacement of the vibration component 3, but also avoids the vibration component 3 from occupying the feeding channel of the granular material and affecting the feeding of the granular material.

[0069] As one implementation method, please refer to Figure 2 , Figure 3 , Figure 8 and Figure 9 The pellet feeding mechanism also includes a second cover 10, which is detachably connected to the feeding pipe assembly 2, thereby covering the vibration motor 301 inside the second cover 10, thus effectively protecting the vibration motor 301 and extending its service life.

[0070] In some implementation methods, please refer to Figure 2 , Figure 3 , Figure 6 and Figure 7 The feeding pipe assembly 2 includes a first connector 201, a pipe body 202, and a second connector 203. The first connector 201, the pipe body 202, and the second connector 203 are connected sequentially from the top to the bottom. The first connector 201 is used to connect to the material bucket assembly 1, the second connector 203 is connected to the print head 5, and the vibration assembly 3 is connected to the first connector 201.

[0071] In one embodiment, the tube body 202 is detachably connected to at least one of the first connector 201 and the second connector 203. For example, the first connector 201 is detachably connected to the tube body 202; or, the second connector 203 is detachably connected to the tube body 202; or, both the first connector 201 and the tube body 202 are detachably connected.

[0072] In this embodiment, the feeding pipe assembly 2 is assembled from multiple parts. When a part fails, it can be replaced, reducing operating costs. The first connector 201 and the second connector 203 can be made of rigid materials, such as stainless steel or plastic, facilitating assembly with other components. The pipe body 202 can be a deformable flexible hose or a rigid, non-deformable pipe, allowing for greater flexibility depending on the specific requirements.

[0073] As an example, please refer to Figure 6 The first connector 201 can be inserted and fixed to the pipe body 202, and the first connector 201 and the pipe body 202 are interference fit. In other embodiments, the first connector and the pipe body can be threaded. Alternatively, the first connector and the pipe body can be connected in other ways, depending on the actual situation.

[0074] In some implementation methods, please refer to Figure 6 The first connector 201 has a first cavity 2011, which extends through the first connector 201. The first cavity 2011 is used to connect the receiving cavity 101 of the material bucket assembly 1 and the tube cavity 2021 of the tube body 202. The first cavity 2011 is a conical cavity, and the cross-sectional area of ​​the first cavity 2011 gradually decreases from the material bucket assembly 1 to the tube body 202, so that the granular material in the receiving cavity 101 can enter the tube cavity 2021 more smoothly.

[0075] In some implementation methods, please refer to Figure 2 , Figure 3 , Figure 8 and Figure 9The outer surface of the feeding pipe assembly 2 has a protrusion 2015, which defines a mounting hole 2014, and a vibration assembly is installed in the mounting hole 2014.

[0076] As one implementation method, please refer to Figure 2 , Figure 3 , Figure 8 and Figure 9 A protrusion 2015 is formed on the outer surface of the first connector 201. The mounting hole 2014 is located near the first cavity 2011, but the mounting hole 2014 is not connected to the first cavity 2011. The mounting hole 2014 is used to install the vibration motor 301.

[0077] As an example, please refer to Figure 9 The mounting hole 2014 can penetrate the first connector 201, meaning that the mounting hole 2014 has a first opening 20141 at the lower end of the mounting hole 2014 and a second opening 20142 at the upper end of the mounting hole 2014. The vibration motor 301 can be inserted into the mounting hole 2014 from bottom to top through the first opening 20141 and fixed inside the mounting hole 2014. The pellet feeding mechanism also includes a support member 12, which is connected to the protrusion 2015. The support member 12 can close the first opening 20141 and is used to support the vibration assembly 3. The pellet feeding mechanism also includes a second cover 10, which is movably connected to the protrusion 2015. The second cover 10 can cover the upper end of the mounting hole 2014 to open and close the second opening 20142.

[0078] It should be noted that, in other embodiments, the vibration motor 301 may be mounted on the first connector 201 in other ways. The mounting hole may have only a first opening 20141 or only a second opening 20142.

[0079] As one implementation method, please refer to Figure 7 The second connector 203 can be inserted and fixed to the pipe body 202, and the second connector 203 and the pipe body 202 are interference fit.

[0080] In other embodiments, the second connector 203 and the pipe body 202 can be connected by a thread. Alternatively, the second connector 203 and the pipe body 202 can be connected in other ways, depending on the actual situation.

[0081] In some implementation methods, please refer to Figure 7 The second connector 203 has a second cavity 2031, which connects the tube 2021 and the material cylinder 501. The material breakage detection switch 401 can be set inside the second cavity 2031.

[0082] It should be noted that in other embodiments, the material breakage detection switch 401 can also be installed on the second connector 203 in other ways.

[0083] In some implementation methods, please refer to Figure 2 and Figure 7 The second connector 203 is also equipped with a discharge valve 204. During normal use, the discharge valve 204 is closed and not connected to the second connector 203, allowing the granules in the second connector 203 to be conveyed to the material cylinder 501 of the print head 5. When the print head 5 stops extruding, if there are still unused granules in the material cylinder assembly 1, the discharge valve 204 can be opened to discharge the remaining granules through its outlet, thus recovering the excess material. Additionally, when the granules stored in the material cylinder assembly 1 deteriorate or become damp, the discharge valve 204 can also be opened to discharge the waste material.

[0084] As one implementation method, please refer to Figure 1 , Figure 2 , Figure 5 and Figure 6 The material bucket assembly 1 includes a bucket body 102, a fixed plate 103, and a movable plate 104. A receiving cavity 101 is formed inside the bucket body 102. The fixed plate 103 is fixed to the lower end of the bucket body 102 and protrudes from the circumference of the bucket body 102. The movable plate 104 is disposed at the lower end of the fixed plate 103. The fixed plate 103 and the movable plate 104 are detachably connected. The fixed plate 103 and the movable plate 104 surround and form an assembly chamber 105. The upper end of the first connector 201 is fixed inside the assembly chamber 105.

[0085] As an example, please refer to Figure 6 The first connector 201 includes a body 2012 and a flange 2013 formed on the upper end of the body 2012. The flange 2013 protrudes circumferentially from the body 2012. During assembly, the first connector 201 can be inserted into the movable plate 104 from top to bottom, so that the lower end of the body 2012 extends out of the movable plate 104. The flange 2013 rests on the upper end of the movable plate 104. Then, the movable plate 104 is connected to the lower end of the fixed plate 103, so that the fixed plate 103 and the movable plate 104 form an assembly chamber 105. The flange 2013 is received in the assembly chamber 105. Then, the fixed plate 103 and the movable plate 104 are fixed together by fasteners such as screws 11. This method is not only easy to assemble, but also easy to disassemble and convenient to use.

[0086] As one implementation method, please refer to Figure 6 The lower end of the first connector 201 is inserted into the upper end of the tube body 202, which can prevent the upper end of the tube body 202 from interfering with the granular material when the granular material enters the tube body 202 from the first connector 201.

[0087] In some implementation methods, please refer to Figure 1 , Figure 3 and Figure 5 The material bucket assembly 1 has a viewing window 106 for easy observation of the granular material inside the receiving cavity 101.

[0088] As an example, the viewport 106 is made of transparent plastic.

[0089] As one implementation method, please refer to Figure 1 and Figure 3 The viewing window 106 can be set on the side of the barrel 102, and the viewing window 106 can extend from the upper end of the barrel 102 to the lower end of the barrel 102 or extend to the lower end near the barrel 102, so that the granular material in the receiving cavity 101 can be observed more intuitively and comprehensively.

[0090] As an example, please refer to Figure 1 and Figure 3 The viewing window 106 can also be equipped with scale lines 107, which allow users to visually observe the amount of granular material.

[0091] In some implementation methods, please refer to Figure 1 as well as Figures 3 to 5 The material bucket assembly 1 also includes a first cover 108, which is closable and connectable to the bucket body 102. The first cover 108 and the bucket body 102 together form a receiving cavity 101. The first cover 108 can effectively protect the granular material in the receiving cavity 101 and prevent the granular material from spilling out when vibrating.

[0092] In some implementation methods, please refer to Figure 1 as well as Figures 3 to 5 The first cover 108 and the barrel 102 are connected by a hinge 109, which not only makes it easy to open and close the first cover 108, but also prevents the first cover 108 from being lost, making it convenient to use.

[0093] As an example, to prevent the first cover 108 from accidentally opening during printing, the first cover 108 and the barrel 102 can also be secured with fasteners. For example, the fasteners can be, but are not limited to, magnetic fasteners, adhesive fasteners, or threaded fasteners, which can be set according to the actual situation and will not be elaborated here.

[0094] As one implementation method, please refer to Figure 5The upper end of the barrel 102 can also be fixed with a first docking plate 110, and the lower end of the first cover 108 can be fixed with a second docking plate 111. When the first cover 108 and the barrel 102 are closed, the first docking plate 110 is supported by the lower end of the second docking plate 111. This can prevent the first cover 108 from being trapped inside the barrel 102 due to deformation of the first cover 108 or the barrel 102 after long-term use, which would make it difficult to open the first cover 108.

[0095] As an example, please refer to Figure 5 The first mating plate 110 can be formed inside the barrel 102, and correspondingly, the second mating plate 111 is formed inside the first cover 108. For example, the first mating plate 110 can be a flanged structure bent inward relative to the barrel 102, and the first mating plate 110 configured as a flanged structure can increase the strength of the barrel 102. The second mating plate 111 can be a flanged structure bent inward relative to the first cover 108, and the second mating plate 111 configured as a flanged structure can increase the strength of the first cover 108.

[0096] It should be noted that in other embodiments, the first cover 108 and the barrel 102 can also be detachably connected. The first cover 108 and the barrel 102 can also be connected by magnetic attraction, or by threaded fasteners, or by other means, depending on the actual situation, which will not be elaborated here.

[0097] The 3D printer of this application includes a body, a printhead 5, and a granular material feeding mechanism provided in any of the above embodiments. The printhead 5 is movably mounted on the body, and the feeding pipe assembly 2 of the granular material feeding mechanism is connected to the printhead 5.

[0098] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0099] The above embodiments merely illustrate preferred implementations of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A pellet feeding mechanism, the pellet feeding mechanism being applied to a 3D printer, the 3D printer including a print head for receiving pellets, characterized in that, The pellet feeding mechanism includes: A hopper assembly defines a receiving cavity for containing the granular material; A feeding pipe assembly is connected to the material barrel assembly and defines a cavity communicating with the receiving cavity, the cavity being used to provide a path for the granular material from the receiving cavity to the print head; A vibration assembly is installed on the feeding pipe assembly and is used to vibrate the feeding pipe assembly.

2. The pellet feeding mechanism as described in claim 1, characterized in that, Also includes: A detection component is installed on the feed pipe assembly.

3. The pellet feeding mechanism as described in claim 2, characterized in that, Also includes: A first controller is installed in the feeding pipe assembly; A first cable connects the first controller and the detection component; The second cable connects the first controller and the vibration component.

4. The pellet feeding mechanism as described in claim 3, characterized in that, The vibration component includes: A vibration motor is installed in the feeding pipe assembly, and the vibration motor includes an output shaft; A cam, fixedly mounted on the output shaft, is used to vibrate the feed pipe assembly.

5. The pellet feeding mechanism as described in claim 4, characterized in that, The vibration assembly also includes: The second controller is connected to the vibration motor, and the second controller and the first controller are connected via the second cable.

6. The pellet feeding mechanism as described in claim 1, characterized in that, The upper end of the feeding pipe assembly is connected to the material bucket assembly, and the lower end of the feeding pipe assembly is used to connect to the print head; or The vibration assembly is installed at the upper end of the feeding pipe assembly; or The vibration assembly is installed outside the cavity.

7. The pellet feeding mechanism as described in claim 1, characterized in that, The feeding pipe assembly includes a first connector, a pipe body, and a second connector connected in sequence. The first connector is connected to the material bucket assembly, and the second connector is used to connect to the print head. The vibration component is connected to the first connector.

8. The pellet feeding mechanism as described in claim 7, characterized in that, The first connector and the tube body are detachably connected; or The tube body and the second connector are detachably connected; or The first connector and the tube body are detachably connected, and the tube body and the second connector are detachably connected.

9. The pellet feeding mechanism as described in claim 7, characterized in that, The first connector has a first cavity connecting the bucket assembly and the tube, and the cross-sectional area of ​​the first cavity gradually decreases from the bucket assembly to the tube.

10. The pellet feeding mechanism as described in claim 1, characterized in that, The hopper assembly includes an openable and closable hopper body and a first cover, the hopper body and the first cover forming the receiving cavity.

11. The pellet feeding mechanism as described in claim 1, characterized in that, The outer surface of the feeding pipe assembly has a protrusion that defines a mounting hole, and the vibration assembly is installed in the mounting hole.

12. The pellet feeding mechanism as described in claim 11, characterized in that, The mounting hole has a first opening, and the pellet feeding mechanism further includes a support member connected to the protrusion. The support member closes the first opening, and the support member is used to support the vibration assembly; and / or The mounting hole has a second opening, and the granular material feeding mechanism further includes a second cover, which is movably connected to the protrusion and is used to open and close the second opening.

13. A 3D printer, characterized in that, include: ontology; The printhead is movably mounted on the main body; The pellet feeding mechanism as described in any one of claims 1 to 12, wherein the feeding pipe assembly of the pellet feeding mechanism is connected to the print head.

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