Nozzle assembly and 3D printing apparatus applying same

Abstract

Embodiments of the present application provide a nozzle assembly and a 3D printing apparatus applying the same. The nozzle assembly comprises a nozzle part, a heat dissipation part, a first connecting piece, a second connecting piece and a support. The nozzle part comprises a nozzle body and a throat tube which are connected to each other. The heat dissipation part is connected to the nozzle body by means of the throat tube. The first connecting piece and the throat tube are both arranged between the nozzle body and the heat dissipation part. The first connecting piece is connected to the nozzle body and the heat dissipation part. The second connecting piece is connected to the heat dissipation part and the support, so that the heat dissipation part is fixed to the support. The 3D printing apparatus comprises a forming platform, a drive assembly and the nozzle assembly. The drive assembly drives at least one of the forming platform and the nozzle assembly to move relative to the other. The nozzle part is used for spraying consumables on the forming platform.

Description

Nozzle assembly and 3D printing device using the same

[0001] This application claims priority to a Chinese patent application filed with the Patent Office of China on September 28, 2023, with application number 202322682097.6 and application name “Nozzle assembly and 3D printing device using the same”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of 3D printing, and in particular to a nozzle assembly and a 3D printing device using the same. Background Art

[0003] 3D printing is a rapid prototyping technology that uses digital model files as a foundation and utilizes adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects layer by layer. Fused deposition modeling (FDP) is one of the main 3D printing technologies. This technology heats and melts a hot-melt filament, extruding it from a nozzle and depositing it onto a build platform or a previously solidified layer of material, ultimately creating the object.

[0004] In the prior art, consumables are usually heated and melted at the nozzle before being extruded. The nozzle of the nozzle assembly usually has a heating unit and is required to keep the nozzle at a relatively high temperature. At the same time, in order to prevent the nozzle assembly from overheating, the nozzle assembly is also provided with a heat sink. In order to improve the respective heating and heat dissipation effects, it is often necessary to separate the nozzle and the heat sink and connect them through a throat. The existing throat is often relatively thin, so when the nozzle touches other units such as the forming platform, the external force is concentrated on the throat, causing the throat to break. The existing solution is usually to use titanium or its oxide as the material of the throat to improve the strength of the throat; however, this structural change will not only lead to an increase in material costs, but also has limited improvement in its strength.

[0005] How to solve the above problems is something that those skilled in the art need to consider.

[0006] Summary of the Invention

[0007] In order to solve the problems in the prior art, the embodiments of the present application provide a nozzle assembly with a strong structure and high reliability, and a 3D printing device using the same.

[0008] The present invention provides a nozzle assembly, comprising:

[0009] a nozzle portion comprising a connected nozzle body and a throat;

[0010] a heat dissipation portion connected to the nozzle body through the throat;

[0011] a first connecting member, wherein the first connecting member and the throat are both provided between the nozzle body and the heat dissipation portion, and the first connecting member connects the nozzle body and the heat dissipation portion;

[0012] The second connecting member connects the heat dissipation portion and a bracket to fix the heat dissipation portion and the bracket.

[0013] In one embodiment, the first connecting member and the second connecting member are both bolts, the first connecting member extends along a first direction, and the second connecting member extends along a second direction, and the first direction and the second direction are different and non-parallel.

[0014] In one embodiment, the nozzle assembly further includes a heat insulating member, which is disposed between the heat dissipation portion and the first connecting member and is used to reduce thermal interaction between the first connecting member and the heat dissipation portion.

[0015] In one embodiment, the first connecting member includes a first section, a second section, and a third section connected in sequence, the first section is connected to the nozzle body, the second section is located between the nozzle body and the heat dissipation part, the third section extends into the heat dissipation part, and the thermal insulation member is sleeved on the outside of the third section.

[0016] In one embodiment, the second connecting member passes through the heat dissipation portion, and at least a portion of the second connecting member extends into the bracket and is connected to the bracket.

[0017] In one embodiment, the heat dissipation portion includes a heat dissipation body and a plurality of heat dissipation blades, the plurality of heat dissipation blades are connected to the heat dissipation body and extend outward, and the second connecting member is connected to the heat dissipation body.

[0018] In one embodiment, the heat dissipation body includes a first supporting part and a second supporting part connected to each other, the thickness of the first supporting part is greater than the thickness of the second supporting part to form a matching groove, and the bracket includes a protruding matching part, the shape of the matching part matches the shape of the matching groove.

[0019] In one embodiment, the first connecting member passes through the first carrying portion and is connected to the matching portion, and the second connecting member passes through the second carrying portion and is connected to the matching portion.

[0020] In one embodiment, a first connecting member is provided on each of two opposite sides of the throat, and a plurality of second connecting members are provided, the plurality of second connecting members are spaced apart and each second connecting member is connected to the heat dissipation portion and the bracket.

[0021] An embodiment of the present application also provides a 3D printing device, which includes a forming platform, a drive assembly, and a nozzle assembly as described in any one of the aforementioned embodiments, wherein the drive assembly drives at least one of the forming platform and the nozzle assembly to move relative to the other, and the nozzle portion is used to spray consumables onto the forming platform.

[0022] The nozzle assembly and 3D printing device provided by the present application are connected at the same time by a throat and a first connecting piece between the nozzle part for heating the extruded consumables and the heat dissipation part for dissipating heat. The connection structure between the nozzle body and the heat dissipation part is expanded from a single throat in the prior art to a throat and a first connecting piece, so that the first connecting piece and the throat are subjected to force at the same time, reducing the probability of damage to the throat due to external force or excessive concentration of internal stress. On the other hand, the heat dissipation part and the waiting part connected by the throat and the first connecting piece can be understood as a force-bearing whole. The heat dissipation part and the bracket are further fixed by the second connecting piece, so that the heat dissipation part and the bracket can be connected into a force-bearing whole. When the nozzle part is subjected to external force, the heat dissipation part and the bracket, as a force-bearing whole connected to the nozzle part, can share the external force on the nozzle part, so that the nozzle assembly structure is firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a perspective schematic diagram of a nozzle assembly provided in an embodiment of the present application at one angle.

[0024] FIG2 is a three-dimensional schematic diagram of the nozzle assembly provided in an embodiment of the present application from another angle.

[0025] FIG3 is a partial three-dimensional schematic diagram of the nozzle assembly provided in an embodiment of the present application.

[0026] FIG4 is an exploded schematic diagram of the nozzle portion of the showerhead assembly provided in an embodiment of the present application.

[0027] FIG5 is a schematic cross-sectional view along the VV direction of FIG3 .

[0028] FIG6 is a schematic cross-sectional view of FIG3 along the VI-VI direction.

[0029] FIG7 is a partial exploded perspective view of a nozzle assembly provided in an embodiment of the present application at one angle.

[0030] FIG8 is a partial exploded perspective view of the nozzle assembly provided in an embodiment of the present application from another angle.

[0031] FIG9 is a schematic three-dimensional diagram of a 3D printing device provided in an embodiment of the present application.

[0032] Description of the main component symbols: Nozzle assembly 10 Bracket 11 Receiving groove 111 Matching portion 112 First connecting hole 1121 Second connecting hole 1122 Nozzle portion 13 Nozzle body 131 Throat 132 Outer sheath 133 Heating element 134 Heat dissipation portion 14 Heat dissipation body 141 Matching groove 1410 First bearing portion 1411 First through hole 14110 Second bearing portion 1412 Second through hole 14120 Heat dissipation blade 142 First connecting member 15 First section 151 Second section 152 Third section 153 Second connecting member 16 Transmission channel 17 Heat insulation member 18 3D printing device 2 Forming platform 21 Driving assembly 22 First direction Z Second direction Y Third direction X

[0033] The following specific embodiments will further illustrate this application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Illustrated 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 limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Like reference numerals represent identical or similar components.

[0035] The terms used herein are only used to describe the purpose of specific exemplary embodiments and are not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. In addition, when used in this article, "include" and / or "comprise" and / or "have", 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 used herein (including technical and scientific terms) have the same meaning as those of ordinary skill in the art to which this application belongs. In addition, unless clearly defined herein, those 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 idealized or overly formal meanings.

[0036] Generally, in the prior art, consumables are usually heated and melted at the nozzle before being extruded. The nozzle of the nozzle assembly usually has a heating unit and there is a need to keep the nozzle at a relatively high temperature. At the same time, in order to prevent the nozzle assembly from overheating, the nozzle assembly is also provided with a heat sink. In order to improve the respective heating and heat dissipation effects, it is often necessary to separate the nozzle and the heat sink and connect them through a throat. The existing throat is often relatively thin, so when the nozzle touches other units such as the forming platform, the external force is concentrated on the throat, causing the throat to break. The existing solution is usually to use titanium or its oxide as the material of the throat to improve the strength of the throat; however, this structural change will not only lead to an increase in material costs, but also has limited improvement in its strength.

[0037] Correspondingly, an embodiment of the present application provides a nozzle assembly and a 3D printing device using the same. The nozzle assembly includes a nozzle portion, a heat dissipation portion, a first connecting member, a second connecting member, and a bracket; the nozzle portion includes a connected nozzle body and a throat; the heat dissipation portion and the nozzle body are connected through a throat; the first connecting member and the throat are both arranged between the nozzle body and the heat dissipation portion, and the first connecting member connects the nozzle body and the heat dissipation portion; the second connecting member connects the heat dissipation portion and the bracket to fix the heat dissipation portion and the bracket. The 3D printing device includes a molding platform, a drive assembly, and a nozzle assembly as described above, the drive assembly drives at least one of the molding platform and the nozzle assembly to move relative to the other, and the nozzle portion is used to spray consumables onto the molding platform.

[0038] Furthermore, the nozzle portion for heating the extruded consumables and the heat dissipation portion for heat dissipation are connected at the same time through the throat and the first connecting piece. The connection structure between the nozzle body and the heat dissipation portion is expanded from a single throat in the prior art to a throat and the first connecting piece. This allows the first connecting piece and the throat to be stressed at the same time, reducing the probability of damage to the throat due to concentrated external force. On the other hand, the heat dissipation portion and the waiting portion connected by the throat and the first connecting piece can be understood as a force-bearing whole. The heat dissipation portion and the bracket are further fixed by the second connecting piece, so that the heat dissipation portion and the bracket can be connected into a force-bearing whole. When the nozzle portion is subjected to external force, the heat dissipation portion and the bracket, as a force-bearing whole connected to the nozzle portion, can share the external force on the nozzle portion, making the nozzle assembly structure firm and highly reliable.

[0039] Those skilled in the art will understand that "3D printing" refers to a technology that uses a digital model file as the basis and uses adhesive materials such as powdered metal or plastic to construct objects by printing layer by layer.

[0040] The following describes exemplary embodiments with reference to the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0041] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0042] As shown in Figures 1 and 2, an embodiment of the present application provides a nozzle assembly 10, including a nozzle portion 13, a heat dissipation portion 14, and a bracket 11. The bracket 11 can be the main load-bearing structure of the nozzle assembly 10. The nozzle portion 13 and the heat dissipation portion 14 are connected to the bracket 11. Other necessary structures in the nozzle assembly 10 (such as the consumable extrusion structure, fan, circuit board, etc.) can also be connected to the bracket 11.

[0043] In one embodiment, the nozzle portion 13 is connected to the heat dissipation portion 14 to dissipate heat from the nozzle portion 13. The heat dissipation portion 14 is connected to the bracket 11 to secure the heat dissipation portion 14. In particular, the nozzle assembly 10 may further include a housing (not shown) connected to the bracket 11 to shield other structures mounted on the bracket 11 and enhance the aesthetics of the nozzle assembly 10. Furthermore, at least one side of the heat dissipation portion 14 is not covered by the housing to enhance the heat dissipation effect of the heat dissipation portion 14.

[0044] 3 to 6 , the nozzle assembly 10 further includes a first connector 15 and a second connector 16. The nozzle portion 13 includes a nozzle body 131 and a throat 132 connected thereto. The heat dissipation portion 14 is connected to the nozzle body 131 via the throat 132. The first connector 15 and the throat 132 are both disposed between the nozzle body 131 and the heat dissipation portion 14, with the first connector 15 connecting the nozzle body 131 and the heat dissipation portion 14. The second connector 16 connects the heat dissipation portion 14 and the bracket 11, thereby securing the heat dissipation portion 14 to the bracket 11.

[0045] As can be understood, the nozzle portion 13, which is used to heat the extruded consumable, and the heat dissipation portion 14, which is used to dissipate heat, are simultaneously connected via the throat 132 and the first connector 15. This expansion of the connection structure between the nozzle body 131 and the heat dissipation portion 14 from the single throat 132 in the prior art to a simultaneous connection of the throat 132 and the first connector 15 allows the first connector 15 and the throat 132 to be subjected to force simultaneously, reducing the probability of damage to the throat 132 due to external forces or excessive internal stress. Furthermore, the heat dissipation portion 14 and the nozzle portion, connected by the throat 132 and the first connector 15, can be understood as a single force-bearing entity. Furthermore, the heat dissipation portion 14 and the bracket 11 are fixed to each other via the second connector 16, allowing the heat dissipation portion 14 and the bracket 11 to be connected as a single force-bearing entity. When the nozzle portion 13 is subjected to external forces, the heat dissipation portion 14 and the bracket 11, as a force-bearing entity connected to the nozzle portion 13, can share the external forces exerted on the nozzle portion 13, making the nozzle assembly 10 structurally strong and highly reliable.

[0046] In one embodiment, the nozzle portion 13 further includes an outer sheath 133 and a heating element 134. The nozzle body 131 is housed within the outer sheath 133, with the bottom end of the nozzle body 131 extending beyond the outer sheath 133 to facilitate ejection of consumables. The heating element 134 is connected to the outer periphery of the nozzle body 131 and is located within the outer sheath 133 to heat the nozzle body 131.

[0047] The throat tube 132 is a columnar structure made of a heat-conducting material. One end of the throat tube 132 is connected to the top of the nozzle body 131, and the other end is connected to the bottom of the heat dissipation portion 14. This allows the throat tube 132 to transfer some of the heat from the nozzle body 131 to the heat dissipation portion 14, thereby preventing the nozzle body 131 from overheating.

[0048] In particular, the outer diameter of the throat 132 is much smaller than that of the nozzle body 131 to prevent the throat 132 from transferring more heat from the nozzle body 131 to the heat dissipation portion 14 , causing more heat loss from the nozzle body 131 and affecting the normal operation of the nozzle body 131 .

[0049] It is understood that the cross-section of the throat pipe 132 can be circular, rectangular, or other shapes. Along the extension direction of the throat pipe 132, the outer diameters of each section of the throat pipe 132 can be the same. Alternatively, the outer diameters of each section of the throat pipe 132 can be different along the extension direction of the throat pipe 132, such that the throat pipe 132 is composed of multiple columnar structures with different outer diameters connected in sequence.

[0050] In one embodiment, the first connecting member 15 and the second connecting member 16 are both bolts. The first connecting member 15 extends along a first direction Z, and the second connecting member 16 extends along a second direction Y. The first direction Z and the second direction Y are different and non-parallel.

[0051] It can be understood that the first connecting member 15 and the second connecting member 16 are bolts. As a common connecting unit, bolts have high guarantees in cost, reliability, practicality, adaptability, etc.; on the premise of ensuring the connection effect between the first connecting member 15 and the second connecting member 16, the first connecting member 15 and the second connecting member 16 can also be connected by connecting members of other shapes or fixing methods.

[0052] It is understood that the first direction Z and the second direction Y are different and non-parallel, which corresponds to the different and non-parallel extension directions of the first connector 15 and the second connector 16. Furthermore, this corresponds to the different priorities of the first connector 15 and the second connector 16 in transmitting force in different directions. The non-co-directional arrangement of the first connector 15 and the second connector 16 allows the connected force-bearing component to more stably withstand external forces from different directions. The first connector 15 and the second connector 16 can disperse the forces in different directions, avoiding damage caused by excessive concentration of external forces or internal stress, thereby improving the reliability of the nozzle assembly 10.

[0053] In one embodiment, a first connecting member 15 is provided on opposite sides of the throat 132 . There are multiple second connecting members 16 , which are spaced apart and each second connecting member 16 is connected to the heat dissipation portion 14 and the bracket 11 .

[0054] In this embodiment, there are two first connectors 15 and two second connectors 16. The two first connectors 15 are spaced apart along a third direction X on opposite sides of the nozzle portion. The two second connectors 16 are also spaced apart along the third direction X on opposite sides of the transmission channel 17 of the nozzle assembly 10. The transmission channel 17 sequentially passes through the heat dissipation portion 14 and the nozzle portion 13 along the first direction Z. The multiple spaced-apart first connectors 15 and second connectors 16 can further improve the reliability of the nozzle assembly 10.

[0055] It will be appreciated that, for ease of description, in the description of the embodiments of this application, the first direction Z is used as the Z-axis direction of a Cartesian coordinate system, the second direction Y is used as the Y-axis direction of the Cartesian coordinate system, and the third direction X is used as the X-direction of the Cartesian coordinate system. In other embodiments, the first direction Z, the second direction Y, and the third direction X may also be other three intersecting directions.

[0056] In one embodiment, further shown in FIG3 , the bracket 11 is formed with a receiving slot 111, and the heat dissipation unit is matchedly disposed in the receiving slot 111. Two second connectors 16 are disposed on a side of the heat dissipation portion 14 away from the nozzle portion 13, for connecting the second connectors 16 to the bracket 11. The nozzle portion 13 is connected to a side of the heat dissipation portion 14 not surrounded by the bracket 11 and extends toward a side away from the bracket 11. A first connector 15 connects the nozzle portion 13 and the heat dissipation portion 14.

[0057] In one embodiment, further shown in conjunction with FIG5 , the second connector 16 penetrates the heat dissipation portion 14, and at least a portion of the second connector 16 extends into the interior of the bracket 11 to connect with the bracket 11. Specifically, the second connector 16 extends along the second direction Y and penetrates the heat dissipation portion 14. The portion that passes through the heat dissipation portion 14 continues to extend into the interior of the bracket 11, thereby securing the heat dissipation portion 14 to the bracket 11 via the second connector 16. It is understood that the surface of the second connector 16 may be provided with external threads (not shown), and the surface of the bracket 11 for accommodating the second connector 16 may also be provided with internal threads (not shown) to achieve the connection and fixation between the second connector 16 and the bracket 11.

[0058] In one embodiment, further in combination with Figure 6, the first connecting member 15 includes a first section 151, a second section 152 and a third section 153 connected in sequence, the first section 151 is connected to the nozzle body 131, the second section 152 is located between the nozzle body 131 and the heat dissipation part 14, the third section 153 extends into the heat dissipation part 14, and the thermal insulation member 18 is sleeved on the outside of the third section 153.

[0059] As can be understood, the first section 151 is the side of the first connector 15 with the nut. The first section 151 is connected to the nozzle body 131, and the nut is locked with the nozzle body 131 in an inverted manner to support the nozzle body 131. The second section 152 is connected to the first section 151 and is located between the nozzle body 131 and the heat dissipation portion 14. The second section 152 is arranged parallel to the throat 132 and is spaced apart to strengthen the connection between the nozzle body 131 and the heat dissipation portion 14. The third section 153 further extends into the heat dissipation portion 14, connecting the heat dissipation portion 14 and the nozzle portion 13 to form a force-bearing whole. The third section 153 further extends into the bracket 11 and connects to the bracket 11, further connecting the heat dissipation portion 14 and the nozzle portion 13 to the bracket 11 to form a force-bearing whole, further improving the reliability of the nozzle assembly 10.

[0060] In one embodiment, the showerhead assembly 10 further includes a heat insulating member 18 . The heat insulating member 18 is disposed between the heat dissipation portion 14 and the first connecting member 15 to mitigate thermal interaction between the first connecting member 15 and the heat dissipation portion 14 .

[0061] It is understood that the two ends of the first connector 15 are connected to both the nozzle 13 for heating the extruded consumable and the heat dissipation section 14 for dissipating heat. Without the thermal insulator 18, the heat generated by the nozzle 13 when heated could be directly transferred through the first connector 15 to the heat dissipation section 14, reducing both the heating efficiency of the nozzle 13 and the heat dissipation efficiency of the heat dissipation section 14. However, installing the thermal insulator 18 outside the portion of the first connector 15 that extends into the heat dissipation section 14 can mitigate thermal interaction between the first connector 15 and the heat dissipation section 14, thereby preventing a decrease in both the heating efficiency of the nozzle 13 and the heat dissipation efficiency of the heat dissipation section 14. The thermal insulator 18 can be made of Teflon.

[0062] 7 and 8 , in one embodiment, the heat dissipation portion 14 includes a heat dissipation body 141 and a plurality of heat dissipation blades 142 . The plurality of heat dissipation blades 142 are connected to the heat dissipation body 141 and extend outward. The second connecting member 16 is connected to the heat dissipation body 141 .

[0063] In this embodiment, the heat sink body 141 extends generally along a first direction Z. The heat sink fins 142 are connected to the heat sink body 141 and extend outward from the heat sink body 141 along a second direction Y, thereby enhancing the heat dissipation efficiency of the heat sink 14. The heat sink body 141 is constructed to be thicker than the heat sink fins 142. The first and second connectors 15 and 16 are primarily connected to the heat sink body 141. While ensuring the connection strength between the first and second connectors 15 and 16 and the heat sink 14, the thickness of the heat sink fins 142 is kept relatively thin to ensure heat dissipation efficiency of the heat sink 14.

[0064] In one embodiment, the heat dissipation body 141 includes a first supporting portion 1411 and a second supporting portion 1412 connected to each other. The thickness of the first supporting portion 1411 is greater than the thickness of the second supporting portion 1412 to form a matching groove 1410. The bracket 11 includes a protruding matching portion 112, and the shape of the matching portion 112 matches the shape of the matching groove 1410.

[0065] In this embodiment, the second supporting portion 1412 is thinner than the first supporting portion 1411 and is offset to one side relative to the first supporting portion 1411 along the second direction Y, forming a matching groove 1410 between the first supporting portion 1411 and the second supporting portion 1412. A relatively thin matching portion 112 is provided on the bracket 11 at a portion protruding from the receiving groove 111. The second supporting portion 1412 and the matching portion 112 are arranged side by side along the second direction Y. The first supporting portion 1411 is located on the side of the first supporting portion 1411 and the matching portion 112 closer to the nozzle portion 13. The sum of the thickness of the second supporting portion 1412 and the matching portion 112 along the second direction Y is approximately equal to the thickness of the first supporting portion 1411 along the first direction Z.

[0066] In one embodiment, the first connecting member 15 passes through the first carrying portion 1411 and is connected to the matching portion 112 , and the second connecting member 16 passes through the second carrying portion 1412 and is connected to the matching portion 112 .

[0067] In this embodiment, the first supporting portion 1411 defines two spaced-apart first through-holes 14110 along the first direction Z. The first through-holes 14110 extend through the first supporting portion 1411 along the first direction Z. The second supporting portion 1412 defines two spaced-apart second through-holes 14120 along the second direction Y. The second through-holes 14120 extend through the second supporting portion 1412 along the second direction Y. The matching portion 112 defines a first connecting hole 1121 along the first direction Z. The first connecting hole 1121 is a blind hole with its opening facing the first supporting portion 1411, connecting the first connecting hole 1121 with the first through-hole 14110 to accommodate the first connector 15. The matching portion 112 defines a second communication hole 1122 along the second direction Y. The second communication hole 1122 is a blind hole with an opening facing the second supporting portion 1412 . The second communication hole 1122 communicates with the second through hole 14120 to receive the second connecting member 16 .

[0068] It can be understood that the first connecting member 15 connects the nozzle portion 13, the heat dissipation portion 14, and the bracket 11 along the first direction Z, and the second connecting member 16 connects the heat dissipation portion 14 and the bracket 11 along the second direction Y. The first connecting member 15 and the second connecting member 16 can disperse the external force exerted on the nozzle portion 13 to the heat dissipation portion 14, and further disperse the external force to the bracket 11 through the heat dissipation portion 14, so that the nozzle assembly 10 of the present application has a strong structure and high reliability.

[0069] Further in combination with Figure 9, an embodiment of the present application also provides a 3D printing device 2, which includes a forming platform 21, a driving component 22 and a nozzle assembly 10 as any one of the aforementioned embodiments, the driving component 22 drives at least one of the forming platform 21 and the nozzle assembly 10 to move relative to the other, and the nozzle part 13 is used to spray consumables onto the forming platform 21.

[0070] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. Such modifications and substitutions are intended to fall within the scope of the present application.

Claims

1. A nozzle assembly, characterized in that: include: a nozzle portion, which includes a connected nozzle body and a throat; a heat dissipation portion connected to the nozzle body through the throat; A first connecting member, which and the throat are both disposed between the nozzle body and the heat dissipation portion, and the first connecting member connects the nozzle body and the heat dissipation portion; The second connecting member connects the heat dissipation part and a bracket to fix the heat dissipation part and the bracket.

2. The nozzle assembly according to claim 1, characterized in that: The first connecting member and the second connecting member are both bolts. The first connecting member is extended along a first direction, and the second connecting member is extended along a second direction. The first direction is different from the second direction and is not parallel.

3. The nozzle assembly according to claim 1, characterized in that: The nozzle assembly further includes a heat insulating member, which is disposed between the heat dissipation portion and the first connecting member and is used to mitigate thermal interaction between the first connecting member and the heat dissipation portion.

4. The nozzle assembly according to claim 3, characterized in that: The first connecting member includes a first section, a second section and a third section which are connected in sequence, the first section is connected to the nozzle body, the second section is located between the nozzle body and the heat dissipation part, the third section extends into the heat dissipation part, and the heat insulating member is sleeved on the outside of the third section.

5. The nozzle assembly according to claim 1, characterized in that: The second connecting member passes through the heat dissipation portion, and at least a portion of the second connecting member extends into the bracket to be connected to the bracket.

6. The nozzle assembly according to claim 1, characterized in that: The heat dissipation part includes a heat dissipation body and a plurality of heat dissipation blades, the plurality of heat dissipation blades are connected to the heat dissipation body and extend outward, and the second connecting member is connected to the heat dissipation body.

7. The nozzle assembly according to claim 6, characterized in that: The heat dissipation body includes a first bearing part and a second bearing part connected to each other, the thickness of the first bearing part is greater than the thickness of the second bearing part to form a matching groove, and the bracket includes a protruding matching part, the shape of the matching part matches the shape of the matching groove.

8. The nozzle assembly according to claim 7, characterized in that: The first connecting member passes through the first bearing portion and is connected to the matching portion, and the second connecting member passes through the second bearing portion and is connected to the matching portion.

9. The nozzle assembly according to claim 1, characterized in that: A first connecting member is respectively provided on two opposite sides of the throat, and the number of the second connecting members is multiple, and the multiple second connecting members are arranged in an interval distribution, and each of the second connecting members is connected to the heat dissipation part and the bracket.

10. A 3D printing device, characterized in that: It includes a molding platform, a driving component and a nozzle assembly as described in any one of claims 1 to 9, wherein the driving component drives at least one of the molding platform and the nozzle assembly to move relative to the other, and the nozzle part is used to spray consumables onto the molding platform.

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