Nozzle structure and 3D printer

Abstract

The invention relates to the field of 3D printing, in particular to a nozzle structure and a 3D printer. The heating assembly and the heat dissipation assembly are arranged in a spaced mode in the first direction; the nozzle assembly sequentially penetrates through the heating assembly and the heat dissipation assembly in the first direction; the fixing assembly is in threaded connection with the heat dissipation assembly and can be screwed in or screwed out relative to the heat dissipation assembly in the second direction so as to abut against or loosen the nozzle assembly, and the second direction is perpendicular to the first direction. Quick mounting and quick dismounting are realized, and the mounting and dismounting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a nozzle structure and a 3D printer. Background Art

[0002] Fused Deposition Modeling (FDM) is a method of heating and melting filaments and then printing and stacking them layer by layer to form a three-dimensional object.

[0003] When the nozzle of a 3D printer is clogged, the nozzle needs to be removed from the 3D printer, cleaned and reinstalled. If the nozzle is severely clogged, it may even need to be replaced. Therefore, the convenience of nozzle removal and installation is very important.

[0004] In the related art, nozzles often do not have a quick-release function. Even if some nozzles can be quickly released, the disassembly process is cumbersome, which seriously affects the loading and unloading efficiency. Summary of the invention

[0005] The embodiments of the present application provide a nozzle structure and a 3D printer, which can not only achieve quick installation and quick disassembly, but also facilitate installation and disassembly, thereby improving loading and unloading efficiency.

[0006] In a first aspect, the nozzle structure provided by the embodiment of the present application includes:

[0007] Heat dissipation components;

[0008] A heating component is spaced apart from the heat dissipation component along a first direction;

[0009] a nozzle assembly, sequentially disposed through the heating assembly and the heat dissipation assembly along the first direction; and

[0010] The fixing assembly is threadedly connected to the heat dissipation assembly and can be screwed in or out along a second direction relative to the heat dissipation assembly to tighten or loosen the nozzle assembly, wherein the second direction is perpendicular to the first direction.

[0011] In some embodiments, the fixing assembly comprises:

[0012] A guide member connected to the heat dissipation assembly;

[0013] an abutment member, which is constrained by the guide member and is movable relative to the guide member along the second direction; and

[0014] A fastener, threadedly connected to the heat dissipation assembly, one end of the fastener abutting against the abutting member;

[0015] The fastener can be screwed in or out relative to the heat dissipation assembly along the second direction so that the abutment member can tighten or loosen the nozzle assembly.

[0016] In some embodiments, the fastener includes a threaded connection portion and a handle portion sequentially arranged along the second direction, the threaded connection portion is threadedly connected to the heat dissipation component and abuts against the abutment member, and the handle portion is exposed from the heat dissipation component;

[0017] The fixing assembly further comprises a first elastic member, and the first elastic member is arranged on a side of the handle facing the heat dissipation assembly;

[0018] When the abutting member is pressed against the nozzle assembly, the first elastic member is compressed between the handle portion and the heat dissipation assembly along the second direction.

[0019] In some embodiments, the fixing assembly further includes a second elastic member, the second elastic member is sleeved on the guide member, and one end of the second elastic member close to the nozzle assembly abuts against the heat dissipation assembly, and one end of the second elastic member away from the nozzle assembly abuts against the abutting member;

[0020] When the fastener causes the abutting member to abut against the nozzle assembly, the second elastic member is compressed between the abutting member and the heat dissipation assembly along the second direction.

[0021] In some embodiments, the heat dissipation component is provided with a first assembly hole extending along the first direction and an assembly cavity connected to one side of the first assembly hole;

[0022] The nozzle assembly is inserted into the first assembly hole and exposed in the assembly cavity;

[0023] The guide member, the abutment member and the second elastic member are arranged in the assembly cavity, and one end of the second elastic member close to the nozzle assembly abuts against the cavity wall of the assembly cavity.

[0024] In some embodiments, the fixing assembly includes two guide members, the two guide members are symmetrically arranged about the central axis of the abutment member, and each guide member is respectively sleeved with a second elastic member;

[0025] Two opposite ends of the abutment member are respectively sleeved on one of the guide members.

[0026] In some embodiments, a first matching groove is formed on a side of the abutment member facing the nozzle assembly, and the first matching groove has two groove walls arranged at an angle, and the two groove walls are symmetrically arranged about the central axis of the nozzle assembly;

[0027] When the abutment member is pressed against the nozzle assembly, the two groove walls are respectively in line contact or surface contact with the outer wall of the nozzle assembly.

[0028] In some embodiments, the nozzle assembly includes a first pipe and a second pipe connected along a first direction, wherein the first pipe is disposed through the heating assembly, and the second pipe is disposed through the heat dissipation assembly;

[0029] The heating component is provided with a second assembly hole matched with the first pipe, and the hole wall of the second assembly hole is in contact with the outer surface of the first pipe;

[0030] Wherein, the outer radial dimension of the first pipe piece gradually decreases in a direction approaching the second pipe piece.

[0031] In some embodiments, a second matching groove is formed on the hole wall of the second assembly hole, and a limiting portion is formed on the first pipe;

[0032] The limiting portion is inserted into the second matching groove to limit the first pipe member passing through the heating component from rotating relative to the heating component.

[0033] In some embodiments, the nozzle assembly further includes a reinforcing tube member sleeved outside the second tube member, and the reinforcing tube member is used to abut against the fixing assembly.

[0034] In some embodiments, the heating assembly includes a temperature-averaging element and a heating element;

[0035] The heating element is constructed as a cylindrical structure sleeved outside the temperature-averaging element;

[0036] The temperature-averaging component is spaced apart from the heat dissipation component, and the temperature-averaging component is used to transfer the heat of the heating component to the first pipe to heat the consumables passing through the first pipe;

[0037] The second assembly hole is opened in the temperature equalizing member.

[0038] In some embodiments, the nozzle structure further comprises a thermal insulation assembly;

[0039] The heat insulation component is connected between the heat dissipation component and the heating component, and the heat insulation component includes a body and a plurality of connecting parts;

[0040] The body is detachably connected to the heating assembly, and a third assembly hole matching the heating assembly is provided on the body;

[0041] All the connecting members are arranged at intervals around the axis of the third assembly hole and are respectively connected between the body and the heat dissipation component to prevent heat from being transferred from the body or the heating component to the heat dissipation component.

[0042] In some embodiments, the connecting member is detachably connected to the main body via a first fixing member, and a heat insulating member is provided on the first fixing member. The heat insulating member is arranged between the first fixing member and the main body to prevent heat from being transferred from the main body or the heating component to the first fixing member.

[0043] In some embodiments, the thermal insulation assembly includes three connectors, and central axes of the three connectors are respectively located on corresponding vertices of the same isosceles triangle, and the geometric center of the isosceles triangle is located on the axis of the third assembly hole.

[0044] In some embodiments, at least one of the connecting members is a first connecting member, which is connected to the heat dissipation component via a second fixing member, and a third mating groove is provided at one end of the first connecting member connected to the heat dissipation component, and the third mating groove is constructed as an annular groove with a central axis in the first direction, and the second fixing member is threadedly connected to the heat dissipation component in a direction perpendicular to the first direction and abuts against the groove wall of the third mating groove.

[0045] In some embodiments, at least one of the connecting members is a second connecting member, and the second connecting member includes a first connecting portion and a second connecting portion that are perpendicular to each other and connected as a whole, wherein the first connecting portion is detachably connected to the main body via a first fixing member, and the first connecting portion and the second connecting portion are respectively at least partially embedded in the heat dissipation component and detachably connected to the heat dissipation component via a third fixing member.

[0046] In some embodiments, the third assembly hole is a threaded hole threadedly connected to the heating component, and the body is further provided with a fourth assembly hole penetrating the third assembly hole in a direction perpendicular to the first direction, and the fourth assembly hole is a threaded hole;

[0047] The nozzle structure also includes a fourth fixing member, which is threadedly connected in the fourth assembly hole and abuts against the heating component.

[0048] In a second aspect, a 3D printer provided in an embodiment of the present application includes the nozzle structure provided in any of the above embodiments.

[0049] In some embodiments, the 3D printer further comprises a base, and the heat dissipation assembly is connected to the base via a pressure collection member.

[0050] In some embodiments, the 3D printer further includes a limiter, the heat dissipation assembly is further connected to the base via the limiter, and the limiter and the pressure collection member are respectively disposed at two ends of the heat dissipation assembly in the first direction;

[0051] Wherein, the limiting member is threadedly connected to the base and penetrates into the heat dissipation assembly along the first direction.

[0052] Compared with the prior art, the beneficial features of the embodiments of the present application are: the nozzle structure and the 3D printer, the nozzle structure, include a heat dissipation component, a heating component, a nozzle component and a fixing component, the heating component and the heat dissipation component are spaced apart along a first direction, the nozzle component is sequentially inserted into the heating component and the heat dissipation component along the first direction, the fixing component is threadedly connected to the heat dissipation component, and can be screwed in or out along a second direction relative to the heat dissipation component to tighten or loosen the nozzle component; through the implementation method of the present application, the nozzle component is sequentially inserted into the heating component and the heat dissipation component along the first direction, the nozzle component can be fixed to the heating component and the heat dissipation component by screwing the fixing component in along the second direction, quick installation can be achieved, and the installation process is simple, which improves the installation efficiency, the nozzle component can be loosened by screwing out the fixing component along the second direction, which facilitates the quick separation of the nozzle component from other components, and quick disassembly is achieved, and the disassembly process is simple, which improves the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is a three-dimensional diagram of the nozzle structure of an embodiment of the present application;

[0054] Figure 2 for Figure 1 Another perspective view of the nozzle structure shown;

[0055] Figure 3 for Figure 1 An exploded view of the nozzle structure is shown;

[0056] Figure 4 for Figure 1 A schematic diagram of the structure of the nozzle shown;

[0057] Figure 5 for Figure 4 AA section enlarged view;

[0058] Figure 6 for Figure 4 BB cross-sectional view;

[0059] Figure 7 for Figure 1 A partial enlarged view of the nozzle structure shown;

[0060] Figure 8 for Figure 1 An enlarged view of a fixed component in the nozzle structure shown;

[0061] Fig. 9 for Figure 1 An enlarged view of the heating component in the nozzle structure shown;

[0062] Fig.10 for Fig. 9 CC section view;

[0063] Fig.11 for Figure 1 An enlarged view of the heat insulation component in the nozzle structure shown;

[0064] Fig.12 for Fig.11 Another perspective diagram of the thermal insulation assembly shown;

[0065] Fig.13 for Fig.11 Another perspective diagram of the thermal insulation assembly shown;

[0066] Fig.14 for Fig.13 DD cross-sectional view;

[0067] Fig.15 for Figure 1 The simulation diagram of the stress distribution of the nozzle structure under dynamic conditions is shown;

[0068] Fig.16 for Figure 1 The temperature distribution simulation diagram of the nozzle structure shown in the working state of the heating component;

[0069] Among them: 1-heat dissipation assembly (11-heat sink (111-first assembly hole, 112-assembly cavity, 113-fifth assembly hole, 114-sixth assembly hole, 115-seventh assembly hole, 116-ninth assembly hole, 117-fifth matching groove, 118-sixth matching groove, 119-eighth assembly hole)), 2-heating assembly (21-temperature equalizing component (211-second assembly hole, 212-second matching groove), 22-heating component, 23-protective shell, 24-temperature sensor), 3-nozzle assembly (3a-feeding end, 3b-discharging end, 31-first pipe (311-outer side, 312-limiting part), 32-second pipe, 33-reinforcement pipe, 34-heat dissipation pipe, 35-hot end nozzle), 4-fixing assembly (41-guide member, 42-abutment member (421-first matching groove (4211-groove wall)), 43-fastener (431-threaded connection part, 432-handle part (4321-fourth matching groove)), 44-first elastic member, 45-second elastic member), 5-thermal insulation component (51-main body (511-third assembly hole, 512-fourth assembly hole), 52-first fixing member, 53-thermal insulation member, 54-first connecting member (541-third matching groove), 55-second fixing member, 56-second connecting member (561-first connecting part, 562-second connecting part), 57-third fixing member, 58-fourth fixing member), 6-pressure collection member (61-tenth assembly hole), 7-fifth fixing member, 8-limiting member. DETAILED DESCRIPTION

[0070] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive.

[0071] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0072] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0073] Please refer to Figures 1 to 5The nozzle structure of the embodiment of the present application includes a heat dissipation component 1, a heating component 2, a nozzle component 3 and a fixing component 4, wherein the heating component 2 and the heat dissipation component 1 are arranged at intervals along a first direction, and the nozzle component 3 is sequentially arranged through the heating component 2 and the heat dissipation component 1 along the first direction. The fixing component 4 is threadedly connected to the heat dissipation component 1. Moreover, the fixing component 4 can be screwed inward relative to the heat dissipation component 1 along a second direction to press against the nozzle component 3. The fixing component 4 can also be screwed out relative to the heat dissipation component 1 along the second direction to loosen the nozzle component 3. The second direction is perpendicular to the first direction.

[0074] In the embodiment of the present application, the nozzle assembly 3 has a feed end 3a and a discharge end 3b arranged opposite to each other. The heating assembly 2 is used to heat the portion of the nozzle assembly 3 near the discharge end 3b, thereby melting the consumables in the portion, so that the discharge end 3b of the nozzle assembly 3 can extrude the molten consumables. The heat dissipation assembly 1 is used to dissipate heat from the portion of the nozzle assembly 3 near the feed end 3a, so that the consumables in the portion are not melted and can be smoothly fed toward the discharge end 3b.

[0075] In the embodiment of the present application, the heating component 2 and the heat dissipation component 1 are arranged at intervals along the first direction, and the nozzle component 3 is sequentially inserted into the heating component 2 and the heat dissipation component 1 along the first direction. The nozzle component 3 can be fixed to the heat dissipation component 1 by screwing the fixing component 4 in the second direction, thereby fixing the nozzle component 3 in the heat dissipation component 1 and the heating component 2, realizing quick installation, and it is easy to use, the installation process is simple, and the installation efficiency is improved. Moreover, it is firmly fixed, so that the nozzle structure can still remain stable during high-speed movement. The nozzle component 3 can be loosened by screwing out the fixing component 4 in the second direction, and the nozzle component 3 can fall off from the heat dissipation component 1 and the heating component 2 along the first direction, thereby quickly separating the nozzle component 3 from other components of the nozzle structure, realizing quick disassembly, and the quick disassembly steps are simplified, which improves the disassembly efficiency, solves the problem of cumbersome quick disassembly operation in the related technology, and realizes one-twist quick disassembly, which is convenient for users to use.

[0076] In some preferred embodiments, please refer to Figure 5 , Figure 7 and Figure 8, the above-mentioned fixing assembly 4 may include a guide member 41, an abutment member 42 and a fastener 43. The guide member 41 is connected to the heat dissipation assembly 1 and extends along the second direction. The abutment member 42 is restricted on the guide member 41. Specifically, the abutment member 42 is arranged on the guide member 41 along the second direction and cannot be separated from the guide member 41. The abutment member 42 can only move on the guide member 41 relative to the guide member 41 along the second direction and cannot rotate around the second direction relative to the guide member 41. The fastener 43 is threadedly connected to the heat dissipation assembly 1 and extends along the second direction, and one end of the fastener 43 abuts against the abutment member 42. The fastener 43 can be screwed in relative to the heat dissipation assembly 1 along the second direction to apply a thrust to the abutment member 42 to move along the second direction until the abutment member 42 presses the nozzle assembly 3 between the abutment member 42 and the heat dissipation assembly 1. The fastener 43 can also be rotated out along the second direction relative to the heat dissipation assembly 1 to cancel the thrust, so that the abutment member 42 no longer abuts against the nozzle assembly 3 , thereby loosening the nozzle assembly 3 .

[0077] In this embodiment, the abutment member 42 can only move along the second direction, so as to avoid the abutment member 42 rotating together with the fastener 43 when the fastener 43 is screwed in or out, resulting in the abutment member 42 being unable to effectively fix the nozzle assembly 3.

[0078] As an optional implementation, please refer to Figure 5 , Figure 7 and Figure 8 The fixing assembly 4 may include two guide members 41, and the two guide members 41 are symmetrically arranged about the central axis of the abutment member 42. The two oppositely arranged ends of the abutment member 42 are respectively sleeved on a guide member 41, so that the abutment member 42 can move more stably and effectively along the second direction, and can further prevent the abutment member 42 from rotating, further improving the tightening effect.

[0079] As an optional implementation, please refer to Figure 5 The central axis of the abutment 42 and the central axis of the fastener 43 can be located on the same straight line L, so that the abutment 42 is subjected to more uniform force and can abut the nozzle assembly 3 more stably or loosen the nozzle assembly 3 more effectively.

[0080] As an example, the guide member 41 can be threadedly connected to the heat dissipation assembly 1, which makes it easier to install and remove the guide member 41.

[0081] In some preferred embodiments, please refer to Figure 5 , Figure 7 and Figure 8The fastener 43 includes a threaded connection portion 431 and a handle portion 432, and the threaded connection portion 431 and the handle portion 432 are fixed together along the second direction. The threaded connection portion 431 is threadedly connected to the heat dissipation component 1 and can abut against the abutment member 42, and the handle portion 432 is exposed to the heat dissipation component 1. By screwing the handle portion 432, the threaded connection portion 431 can be screwed in or out along the second direction, so that the abutment member 42 can tighten or loosen the nozzle assembly 3.

[0082] In some more preferred embodiments, please refer to Figure 5 and Figure 8 The fixing assembly 4 may further include a first elastic member 44, which is disposed on the side of the handle portion 432 facing the heat dissipation assembly 1. When the abutting member 42 abuts against the nozzle assembly 3, the first elastic member 44 is compressed along the second direction between the handle portion 432 and the heat dissipation assembly 1. The first elastic member 44 compressed along the second direction can apply a thrust to the fastener 43 away from the heat dissipation assembly 1, that is, the resilience of the first elastic member 44 keeps the fastener 43 in a tensioned state, thereby reducing the thread gap between the threaded connection portion 431 and the heat dissipation assembly 1, and preventing the fastener 43 from rotating relative to the heat dissipation assembly 1 during the high-speed operation of the nozzle structure, further improving the stability of the nozzle structure, and thereby solving the problem of the fastener 43 deflecting after long-term use. Even long-term use will not change the performance of the nozzle structure.

[0083] As an optional implementation, please refer to Figure 5 and Figure 8 The first elastic member 44 may be a wear-resistant nitrile O-ring. The wear-resistant nitrile O-ring has the property of restoring elasticity after being squeezed, so that the thread gap between the threaded connection part 431 and the heat dissipation component 1 is smaller, preventing the fastener 43 from rotating relative to the heat dissipation component 1 during the high-speed operation of the nozzle structure, and further improving the stability of the nozzle structure.

[0084] As an example, please refer to Figure 5 A fourth mating groove 4321 is provided on the side of the handle portion 432 facing the heat dissipation component 1. The first elastic member 44 is interference fit with the fourth mating groove 4321, thereby preventing the first elastic member 44 from falling off from the fourth mating groove 4321, and making the installation more reliable. Specifically, part of the first elastic member 44 is embedded in the fourth mating groove 4321, and the other part of the first elastic member 44 is exposed from the fourth mating groove 4321, which is convenient for installation and replacement of the first elastic member 44. When the fastener 43 is screwed into place, the first elastic member 44 is squeezed between the handle portion 432 and the heat dissipation component 1, and the resilience of the first elastic member 44 acts as a thrust on the fastener 43, which can prevent the fastener 43 from rotating relative to the heat dissipation component 1.

[0085] It should be noted that, in other embodiments, the first elastic member 44 may also be made of other materials or other elastic structures, which will not be elaborated herein.

[0086] In some preferred embodiments, please refer to Figures 1 to 5 , Figure 7 and Figure 8 The fixing assembly 4 may further include a second elastic member 45. The second elastic member 45 is sleeved on the guide member 41, and one end of the second elastic member 45 close to the nozzle assembly 3 abuts against the heat dissipation assembly 1, and one end of the second elastic member 45 away from the nozzle assembly 3 abuts against the abutment member 42. When the fastener 43 causes the abutment member 42 to abut against the nozzle assembly 3, the second elastic member 45 is compressed along the second direction between the abutment member 42 and the heat dissipation assembly 1, and the first elastic member 44 compressed along the second direction can apply a thrust to the fastener 43 away from the heat dissipation assembly 1, thereby further reducing the thread gap between the threaded connection portion 431 and the heat dissipation assembly 1, thereby solving the problem of the fastener 43 deflecting after long-term use, and the performance of the nozzle structure will not be changed even if it is used for a long time. Furthermore, when the nozzle assembly 3 needs to be disassembled, the fastener 43 only needs to be unscrewed along the second direction. Since the second elastic member 45 is compressed between the abutment 42 and the heat dissipation assembly 1 along the second direction, the abutment 42 can quickly loosen the nozzle assembly 3 under the action of the rebound force of the second elastic member 45, thereby effectively preventing the abutment 42 from being stuck on the guide member 41 and causing the abutment 42 to be unable to loosen the nozzle assembly 3.

[0087] As an optional implementation, please refer to Figures 1 to 5 , Figure 7 and Figure 8 The second elastic member 45 may be a compression spring, which is easy to install. When the second elastic member 45 fails, it is also easy to replace the second elastic member 45.

[0088] It should be noted that, in other embodiments, the second elastic member 45 may also be other elastic structures, which will not be described in detail herein.

[0089] It can be understood that when the fixing assembly 4 includes a plurality of guide members 41 , a second elastic member 45 is correspondingly sleeved on each guide member 41 , so that the fastener 43 and the abutment member 42 are subjected to more uniform force.

[0090] For some examples, see Figures 1 to 6The heat dissipation assembly 1 includes a heat sink 11, and a first assembly hole 111 and an assembly cavity 112 are provided on the heat sink 11. The first assembly hole 111 extends along the first direction and penetrates the heat sink 11, and the assembly cavity 112 is connected to one side of the first assembly hole 111. The nozzle assembly 3 is penetrated in the first assembly hole 111, and part of the outer surface of the nozzle assembly 3 is exposed in the assembly cavity 112. The guide member 41, the abutment member 42 and the second elastic member 45 are arranged in the assembly cavity 112, so as to protect the guide member 41, the abutment member 42 and the second elastic member 45, and improve the service life of the fixing assembly 4. Correspondingly, one end of the second elastic member 45 close to the nozzle assembly 3 abuts against the cavity wall of the assembly cavity 112. The heat sink 11 is also provided with a fifth assembly hole 113, a sixth assembly hole 114 and a seventh assembly hole 115 connected to the assembly cavity 112. The fifth assembly hole 113 is a threaded hole threadedly connected to the threaded connection part 431. Specifically, the fifth assembly hole 113 is a through hole and is disposed on the side of the assembly cavity 112 away from the first assembly hole 111. The sixth assembly hole 114 and the seventh assembly hole 115 are respectively disposed corresponding to the guide member 41. Specifically, the sixth assembly hole 114 is a through hole and is disposed on the side of the assembly cavity 112 away from the first assembly hole 111. The seventh assembly hole 115 is disposed on the first side of the assembly cavity 112 close to the first assembly hole 111, and the seventh assembly hole 115 can be a threaded hole. One end of the guide member 41 is provided with an external thread that cooperates with the seventh assembly hole 115. The end of the guide member 41 provided with the above-mentioned external thread can be inserted into the sixth assembly hole 114 along the second direction and then extend into the assembly cavity 112. Then, the abutment member 42 and the second elastic member 45 are sequentially sleeved on the end of the guide member 41 extending into the assembly cavity 112, and then the guide member 41 is screwed into the seventh assembly hole 115, so that the abutment member 42 and the second elastic member 45 are restricted on the guide member 41, which is not only convenient for installation, but also can effectively protect the guide member 41, the abutment member 42 and the second elastic member 45.

[0091] In some preferred embodiments, please refer to Figure 5 , Figure 7 and Figure 8 A first matching groove 421 may be provided on one side of the abutting member 42 facing the nozzle assembly 3 . When the abutting member 42 abuts against the nozzle assembly 3 , the nozzle assembly 3 abuts against a groove wall 4211 of the first matching groove 421 .

[0092] In some more preferred embodiments, please refer to Figure 8The first matching groove 421 has two groove walls 4211 set at an angle, and the two groove walls 4211 are symmetrically arranged about the central axis of the nozzle assembly 3. The two groove walls 4211 symmetrically abut against the nozzle assembly 3, so that the nozzle assembly 3 is more evenly stressed and has a larger stress-bearing area, thereby reducing damage to the nozzle assembly 3, thereby solving the problem of damage to the nozzle assembly 3 after long-term use, and making the nozzle assembly 3 less likely to rust.

[0093] As an example, the cross-sectional shape of the first matching groove 421 may be V-shaped. Figure 8 As shown, when the abutment member 42 is pressed against the nozzle assembly 3, the two groove walls 4211 are in line contact with the outer wall of the nozzle assembly 3 respectively. Compared with point contact, the two groove walls 4211 of the first matching groove 421 are in line contact with the outer wall of the nozzle assembly 3 respectively, so that the force on the nozzle assembly 3 is more dispersed and more uniform, and the force-bearing area is larger, thereby reducing damage to the nozzle assembly 3, thereby solving the problem of damage to the nozzle assembly 3 after long-term use, and making the nozzle assembly 3 less prone to rust. Moreover, even if there is a processing error in the nozzle assembly 3, the two groove walls 4211 of the first matching groove 421 can also be in line contact with the outer wall of the nozzle assembly 3 respectively, ensuring the stability of the nozzle structure and preventing the nozzle assembly 3 from shaking when the nozzle structure runs at high speed.

[0094] As an example, the cross-sectional shape of the first mating groove 421 can also be U-shaped, and the two groove walls 4211 are smoothly connected as a whole. When the abutment member 42 is pressed against the nozzle assembly 3, the two groove walls 4211 are in contact with the outer wall surface of the nozzle assembly 3, and the force-bearing area is larger, thereby reducing damage to the nozzle assembly 3, thereby solving the problem of damage to the nozzle assembly 3 after long-term use, and making the nozzle assembly 3 less prone to rust.

[0095] In some preferred embodiments, please refer to Figure 3 , Figure 6 and Figure 7The nozzle assembly 3 includes a first pipe fitting 31 and a second pipe fitting 32, which are connected and fixed along a first direction, wherein the first pipe fitting 31 is inserted into the heating assembly 2, and the second pipe fitting 32 is inserted into the heat dissipation assembly 1. The heating assembly 2 is provided with a second assembly hole 211 that matches the first pipe fitting 31, and the hole wall of the second assembly hole 211 is attached to the outer surface of the first pipe fitting 31, that is, the first pipe fitting 31 and the heating assembly 2 are attached to each other, so that the first pipe fitting 31 is heated more evenly, and the heat transfer efficiency is improved. Among them, the outer radial dimension of the first pipe fitting 31 gradually decreases in the direction close to the second pipe fitting 32, and accordingly, the aperture of the second assembly hole 211 gradually decreases in the direction close to the second pipe fitting 32, which can not only prevent the first pipe fitting 31 inserted in the heating assembly 2 from moving upward relative to the heating assembly 2 along the first direction, but also realize the rapid positioning of the nozzle assembly 3 in the heating assembly 2, and improve the stability of the nozzle structure. Moreover, this embodiment makes it easier to separate the nozzle assembly 3 from the heating assembly 2. When the nozzle assembly 3 needs to be removed, the fastener 43 can be screwed so that the nozzle assembly 3 automatically falls off under the action of gravity. The outer radial dimension of the first pipe 31 gradually decreases in the direction close to the second pipe 32, making it easier to quickly remove the nozzle assembly 3. In addition, this embodiment can also increase the heat transfer area.

[0096] As an optional implementation, please refer to Figure 3 , Figure 6 and Figure 7 The outer side surface 311 of the first pipe fitting 31 can be a frustum surface whose diameter gradually decreases along the direction approaching the second pipe fitting 32. Correspondingly, the hole wall of the second assembly hole 211 is also a frustum surface whose diameter gradually decreases along the direction approaching the second pipe fitting 32. The frustum surfaces are in contact with each other, and the heat is more evenly received, which can increase the heat transfer area and effectively prevent the nozzle assembly 3 from moving upward, thereby improving the stability of the nozzle structure.

[0097] As an optional implementation, please refer to Figure 6 One end of the second pipe fitting 32 is inserted into the first pipe fitting 31 along the first direction, and there is an interference fit between the first pipe fitting 31 and the second pipe fitting 32, so the connection is more secure.

[0098] As an example, the second pipe 32 may be a titanium pipe. It should be noted that in other embodiments, the second pipe 32 may also be made of other materials.

[0099] In some more preferred embodiments, please refer to Figure 6The second fitting groove 212 is provided on the hole wall of the second assembly hole 211, and the outer side surface 311 of the first pipe 31 is provided with a stopper 312 exposed from the outer side surface 311. When the first pipe 31 is inserted into the heating component 2 along the first direction, the stopper 312 can be inserted into the second fitting groove 212 along the first direction, thereby preventing the nozzle component 3 inserted into the heating component 2 from rotating relative to the heating component 2, making the nozzle structure more reliable and stable.

[0100] As an optional implementation, please refer to Figure 6 The hole wall of the second assembly hole 211 may be provided with two second matching grooves 212, and the two second matching grooves 212 are arranged axially symmetrically about the axis of the second assembly hole 211. Accordingly, two limiting portions 312 are fixed on the first pipe 31, and the two limiting portions 312 are arranged one-to-one with the two second matching grooves 212. Each limiting portion 312 is inserted into the corresponding second matching groove 212 along the first direction, so that the nozzle assembly 3 is subjected to more uniform force.

[0101] Since the nozzle assembly 3 and the abutment member 42 are fixed by pressure, the second pipe member 32 passing through the heat dissipation assembly 1 needs to bear the pressure applied by the abutment member 42. In some more preferred embodiments, please refer to Figure 3 ,as well as Figures 5 to 7 The nozzle assembly 3 also includes a reinforcing pipe 33, which is sleeved and fixed outside the second pipe 32. The reinforcing pipe 33 is used to abut against the abutment 42 to prevent the abutment 42 from crushing the second pipe 32, thereby increasing the service life of the nozzle assembly 3.

[0102] As an optional implementation, the reinforcing pipe 33 is nitrided with SKD11 and then chrome-plated, so that the reinforcing pipe 33 has greater hardness and is not easy to rust.

[0103] In some more preferred embodiments, please refer to Figure 3 , Figure 6 and Figure 7 The nozzle assembly 3 also includes a heat dissipation pipe 34, which is sleeved and fixed outside the second pipe 32, and the heat dissipation pipe 34 and the second pipe 32 are interference fit, so that the heat of the second pipe 32 can be transferred to the heat dissipation assembly 1 more quickly and effectively through the heat dissipation pipe 34.

[0104] As an optional implementation, compared with the reinforcing pipe 33, the heat dissipation pipe 34 is arranged closer to the first pipe 31, so as to avoid heat transfer to the fixing component 4 as much as possible, thereby improving the user experience and safety.

[0105] In some more preferred embodiments, please refer to Figure 3 , Figure 6 and Figure 7The nozzle assembly 3 also includes a hot end nozzle piece 35, which is inserted into an end of the first pipe piece 31 away from the second pipe piece 32, and the hot end nozzle piece 35 and the first pipe piece 31 are interference fit, thereby improving the structural stability of the nozzle assembly 3.

[0106] In some preferred embodiments, please refer to Figure 6 , Fig. 9 and Fig.10 The heating component 2 includes a temperature-averaging component 21 and a heating component 22. The temperature-averaging component 21 is spaced apart from the heat dissipation component 1, and a second assembly hole 211 is provided in the temperature-averaging component 21. The heating component 22 is constructed as a cylindrical structure sleeved outside the temperature-averaging component 21, and the heating component 22 is used to heat the temperature-averaging component 21, and the temperature-averaging component 21 is used to uniformly transfer the heat from the heating component 22 to the nozzle assembly 3 inserted in the temperature-averaging component 21, so as to uniformly and effectively heat the consumables to a molten state. As an example, the heating component 22 can be an annular ceramic ring, and the annular ceramic ring is used to heat the temperature-averaging component 21. On the basis of realizing quick disassembly, the heat transfer efficiency can also be made more efficient, thereby solving the problem of uneven heating of the nozzle assembly 3.

[0107] As an example, in order to facilitate loading and unloading and protect the heating element 22 at the same time, a clearance fit is formed between the heating element 22 and the temperature-uniform element 21 .

[0108] As an optional implementation, please refer to Figure 6 , Fig. 9 and Fig.10 The heating component 2 may further include a protective shell 23, which covers the temperature-averaging component 21 and the heating component 22 to prevent heat leakage, thereby ensuring a heating effect and being safer.

[0109] As an optional implementation, please refer to Fig.10 In order to better control the heating effect, the heating component 2 may further include a temperature sensor 24 .

[0110] In some preferred embodiments, please refer to Figures 1 to 4 , Figure 6 ,as well as Figures 11 to 14 The nozzle structure also includes a heat insulation component 5, which is connected between the heat dissipation component 1 and the heating component 2, thereby blocking heat from being transferred from the body 51 or the heating component 2 to the heat dissipation component 1, thereby preventing the occurrence of thermal creep of the consumables.

[0111] Specifically, the thermal insulation component 5 may include a main body 51 and a plurality of connectors. The main body 51 is detachably connected to the heating component 2. As an example, a third assembly hole 511 is provided on the main body 51 to cooperate with the temperature equalizer 21. All connectors are arranged at intervals around the axis of the third assembly hole 511, and are respectively connected between the main body 51 and the heat dissipation component 1, which not only allows the heating component 2 and the heat dissipation component 1 to be securely fixed together through the thermal insulation component 5, but also effectively prevents the heat of the heating component 2 from being transferred from the main body 51 to the heat dissipation component 1, which not only ensures the heating effect of the heating component 2, but also avoids the heat of the main body 51 or the heating component 2 from being transferred toward the heat dissipation component 1 as much as possible, prevents the occurrence of thermal creep of consumables, and also avoids the heat from being transferred to the fixing component 4, thereby improving the user experience.

[0112] As an optional embodiment, the connector can be made of a heat-insulating material. As an example, the connector can be made of a composite material of polyetheretherketone (PEEK) and glass fiber (GF), which is not only resistant to high temperatures but also wear-resistant, thereby increasing the service life of the heat dissipation component 1.

[0113] It should be noted that in other embodiments, the connecting piece may also be made of other materials, which will not be elaborated here.

[0114] In some more preferred embodiments, please refer to Figure 6 and Fig.14 The connecting member can be detachably connected to the main body 51 through the first fixing member 52, and a heat insulating member 53 is provided on the first fixing member 52, and the heat insulating member 53 is arranged between the first fixing member 52 and the main body 51. The first fixing member 52 and the main body 51 are not in direct contact, and there is a gap between the two, which blocks the heat from being transferred from the main body 51 to the first fixing member 52, thereby blocking the heat from being transferred from the main body 51 or the heating component 2 to the heat dissipation component 1 as much as possible.

[0115] As an example, the first fixing member 52 may be a threaded member. For example, the first fixing member 52 may be a screw.

[0116] As an optional implementation, please refer to Figures 11 to 14The thermal insulation component 5 includes three connecting parts, and the central axes of the three connecting parts are respectively located on the corresponding vertices of the same isosceles triangle. The geometric center of the isosceles triangle is located on the axis of the third assembly hole 511. Not only can the thermal insulation component 5 stably and effectively connect the heating component 2 and the heat dissipation component 1, but the second pipe 32 is also penetrated by the thermal insulation component 5. Compared with only a single or two connecting parts, the three connecting parts can withstand forces from different directions. In addition to having an insulating effect, they can also protect the second pipe 32 and effectively prevent the second pipe 32 from breaking.

[0117] In some preferred embodiments, please refer to Figures 11 to 14 At least one of the connectors is a first connector 54. The first connector 54 is detachably connected to the body 51 through a first fixing member 52. The first connector 54 is also detachably connected to the heat dissipation assembly 1 through a second fixing member 55. The first fixing member 52 does not directly contact the heat sink 11, further preventing the heat of the heating assembly 2 from being transferred from the body 51 to the heat dissipation assembly 1, thereby blocking the heat from being transferred from the body 51 or the heating assembly 2 to the heat dissipation assembly 1 as much as possible, further improving the heat insulation effect. A third matching groove 541 is provided at one end of the first connector 54 connected to the heat dissipation assembly 1. The third matching groove 541 is constructed as an annular groove with the central axis in the first direction. The second fixing member 55 is threadedly connected to the heat dissipation assembly 1 in a direction perpendicular to the first direction, and the end of the second fixing member 55 abuts against the groove wall 4211 of the third matching groove 541, thereby fixing the first connector 54 to the heat dissipation assembly 1.

[0118] As an optional implementation, please refer to Fig.13 As shown, the third matching groove 541 may be an annular groove with a V-shaped cross section, so that the second fixing member 55 may be more securely abutted against the groove wall 4211 of the third matching groove 541, thereby improving the overall stability of the nozzle structure.

[0119] As an example, the second fixing member 55 may be a threaded member. For example, the second fixing member 55 may be a screw.

[0120] In some more preferred embodiments, in order to improve the stability of the overall structure, each first connecting member 54 is connected to the heat dissipation assembly 1 through two second fixing members 55 , and the two second fixing members 55 are symmetrically arranged about the central axis of the first connecting member 54 .

[0121] As an example, the heat sink 11 may be provided with an eighth assembly hole 119 that is plugged into and matched with the first connector 54. The eighth assembly hole 119 may be a light hole. Two ninth assembly holes 116 are symmetrically provided on the hole wall of the eighth assembly hole 119. The ninth assembly holes 116 are matched with the second fixing member 55 in a one-to-one correspondence. The ninth assembly holes 116 may be threaded holes and through holes. During installation, the first connector 54 may be first inserted into the eighth assembly hole 119, and then the second fixing member 55 may be screwed into the corresponding ninth assembly hole 116 until the end of the second fixing member 55 abuts against the third matching groove 541.

[0122] In some preferred embodiments, please refer to Figures 11 to 14 , at least one connecting member is a second connecting member 56. The second connecting member 56 includes a first connecting portion 561 and a second connecting portion 562, which are perpendicular to each other and fixed as a whole. The first connecting portion 561 is detachably connected to the body 51 through the first fixing member 52, and the second connecting portion 562 is detachably connected to the heat dissipation component 1 through the third fixing member 57. The first fixing member 52 does not directly contact the heat sink 11, further preventing the heat of the heating component 2 from being transferred from the body 51 to the heat dissipation component 1, thereby blocking the heat from being transferred from the body 51 or the heating component 2 to the heat dissipation component 1 as much as possible, further improving the heat insulation effect.

[0123] As an example, the third fixing member 57 may be a threaded member. For example, the third fixing member 57 may be a screw.

[0124] In some more preferred embodiments, the first connection portion 561 is at least partially embedded in the heat dissipation component 1, and the second connection portion 562 is at least partially embedded in the heat dissipation component 1, which makes it easier to quickly and accurately position the second connection member 56 on the heat dissipation component 1 and prevent the second connection member 56 from rotating relative to the heat dissipation component 1.

[0125] As an example, the two outer sides of the heat sink 11 may be provided with a fifth matching groove 117 and a sixth matching groove 118 that are connected as one. The first connecting portion 561 is partially embedded in the fifth matching groove 117 , and the second connecting portion 562 is partially embedded in the sixth matching groove 118 .

[0126] As an optional implementation, please refer to Figures 11 to 14 The heat insulation assembly 5 includes three connecting members, namely a first connecting member 54 and two second connecting members 56. The two first connecting members 54 are symmetrically arranged about the axis of the third assembly hole 511, which is not only easy to install, but also has a reliable connection and strong stability. Figure 2 , Figure 6 and Fig.15It can be seen that a portion of the second pipe 32 is exposed between the heat dissipation pipe 34 and the first pipe 31. Compared with other portions of the first pipe 31, the stress on this portion of the first pipe 31 is greater. In this embodiment, under dynamic conditions such as high-speed operation of the nozzle structure, when a force of 100N is applied to the nozzle structure in the positive direction along the Z direction, please refer to Fig.15 As shown, the maximum stress of the nozzle structure is close to 94 MPa, while the maximum stress of the first pipe 31 is less than 11 MPa, which is much smaller than the tensile strength of the first pipe 31 . The risk of breakage of the first pipe 31 is low. Therefore, this embodiment can effectively avoid the breakage of the second pipe 32 .

[0127] In this embodiment, the heat insulation component 5 has good heat insulation performance, which can reduce the high temperature of the heating component 2 to the heat dissipation component 1, thereby further preventing the occurrence of thermal creep of consumables. Fig.16 As shown, when the maximum temperature of the first tube 31 and the hot end nozzle 35 is as high as 210°C or above, the second tube 32 is exposed from the first tube 31 and the temperature near the first tube 31 is less than 43°C. Therefore, the nozzle structure of this embodiment can effectively prevent the consumables in the second tube 32 from being melted, so that the consumables in the second tube 32 can be smoothly transported to the first tube 31.

[0128] In some preferred embodiments, please refer to Figures 11 to 14 , the third assembly hole 511 is a threaded hole threadedly connected to the heating component 2. The body 51 is also provided with a fourth assembly hole 512, which is a threaded hole, and the fourth assembly hole 512 passes through the third assembly hole 511 in a direction perpendicular to the first direction. The nozzle structure also includes a fourth fixing member 58, which is used to further fasten the heating component 2 and the thermal insulation component 5. Specifically, the fourth fixing member 58 is threadedly connected in the fourth assembly hole 512, and the end of the fourth fixing member 58 abuts against the heating component 2.

[0129] As an optional implementation, please refer to Figure 3 , Figure 6 ,as well as Figures 11 to 14 The third assembly hole 511 is a threaded hole threadedly connected to the temperature equalizer 21, the fourth fixing member 58 is a threaded member, the fourth fixing member 58 is threadedly connected to the fourth assembly hole 512, and the end of the fourth fixing member 58 abuts against the temperature equalizer 21, thereby firmly fixing the heating component 2 and the insulation component 5 to prevent the temperature equalizer 21 from deflecting relative to the main body 51 after the installation is completed.

[0130] As an example, please refer to Fig.14 The nozzle assembly 3 may include a plurality of fourth fixing members 58 to further improve the fastening effect.

[0131] In some examples, the fourth fixing member 58 may be a screw.

[0132] The 3D printer of the embodiment of the present application includes the nozzle structure provided by any of the above embodiments.

[0133] In the embodiment of the present application, the heating component 2 and the heat dissipation component 1 are arranged at intervals along the first direction, and the nozzle component 3 is sequentially inserted into the heating component 2 and the heat dissipation component 1 along the first direction. The nozzle component 3 can be fixed to the heat dissipation component 1 by screwing the fixing component 4 in the second direction, thereby fixing the nozzle component 3 in the heat dissipation component 1 and the heating component 2, achieving quick installation, and being easy to use and having a simple installation process, thereby improving installation efficiency. The nozzle component 3 can be loosened by screwing out the fixing component 4 in the second direction, and the nozzle component 3 can fall off from the heat dissipation component 1 and the heating component 2 along the first direction, thereby quickly separating the nozzle component 3 from other components of the nozzle structure, achieving quick disassembly, improving disassembly efficiency, solving the problem of cumbersome quick disassembly operation in the related art, and achieving one-twist quick disassembly, which is convenient for users to use.

[0134] In some preferred embodiments, the 3D printer further comprises a base (not shown), and the heat sink 11 of the heat dissipation assembly 1 is connected by Figures 1 to 4 The pressure collection component 6 shown is connected to the base, and the pressure collection component 6 can collect the pressure signal provided by the heat sink 11.

[0135] As an example, please refer to Figure 1 The pressure collection member 6 can be a strain gauge. The heat sink 11 and the pressure collection member 6 are fixedly connected by the fifth fixing member 7, and the pressure collection member 6 is fixed to the base by the sixth fixing member (not shown in the figure). The pressure collection member 6 is provided with a tenth assembly hole 61 that cooperates with the sixth fixing member.

[0136] As an example, the fifth fixing member 7 and the sixth fixing member can both be threaded members. For example, the fifth fixing member 7 can be a screw. The sixth fixing member can be a screw.

[0137] In some preferred embodiments, the 3D printer further includes a stopper 8, see Figures 1 to 4 The heat dissipation component 1 is also connected to the base through a stopper 8, and the stopper 8 and the pressure collection component 6 are respectively arranged at two ends of the heat dissipation component 1 in the first direction, thereby effectively preventing the nozzle structure from shaking during high-speed movement.

[0138] As an optional embodiment, the limit member 8 can be threadedly connected to the base, and the limit member 8 is inserted into the heat sink 11 of the heat dissipation component 1 along the first direction, which is not only convenient for installation but also can effectively limit the heat dissipation component 1, making the heat dissipation component 1 more securely and stably installed.

[0139] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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.

[0140] The above embodiments only express the preferred implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. Nozzle structure, characterized in that: include: Heat dissipation components; A heating component is spaced apart from the heat dissipation component along a first direction; A nozzle assembly, sequentially arranged through the heating assembly and the heat dissipation assembly along the first direction; and The fixing assembly is threadedly connected to the heat dissipation assembly and can be screwed in or out along a second direction relative to the heat dissipation assembly to tighten or loosen the nozzle assembly, wherein the second direction is perpendicular to the first direction.

2. The nozzle structure according to claim 1, characterized in that: The fixing assembly comprises: A guide member connected to the heat dissipation assembly; an abutment member, which is restricted by the guide member and can move relative to the guide member along the second direction; and A fastener, threadedly connected to the heat dissipation assembly, one end of the fastener abutting against the abutting member; The fastener can be screwed in or out relative to the heat dissipation assembly along the second direction so that the abutment member can tighten or loosen the nozzle assembly.

3. The nozzle structure according to claim 2, characterized in that: The fastener comprises a threaded connection portion and a handle portion sequentially arranged along the second direction, the threaded connection portion is threadedly connected to the heat dissipation component and abuts against the abutment member, and the handle portion is exposed from the heat dissipation component; The fixing assembly further comprises a first elastic member, and the first elastic member is arranged on a side of the handle facing the heat dissipation assembly; When the abutting member is pressed against the nozzle assembly, the first elastic member is compressed between the handle portion and the heat dissipation assembly along the second direction.

4. The nozzle structure according to claim 2, characterized in that: The fixing assembly further comprises a second elastic member, the second elastic member is sleeved on the guide member, and one end of the second elastic member close to the nozzle assembly abuts against the heat dissipation assembly, and one end of the second elastic member away from the nozzle assembly abuts against the abutting member; When the fastener causes the abutting member to abut against the nozzle assembly, the second elastic member is compressed between the abutting member and the heat dissipation assembly along the second direction.

5. The nozzle structure according to claim 4, characterized in that: The heat dissipation component is provided with a first assembly hole extending along the first direction and an assembly cavity connected to one side of the first assembly hole; The nozzle assembly is inserted into the first assembly hole and exposed in the assembly cavity; The guide member, the abutment member and the second elastic member are arranged in the assembly cavity, and one end of the second elastic member close to the nozzle assembly abuts against the cavity wall of the assembly cavity.

6. The nozzle structure according to claim 4, characterized in that: The fixing assembly comprises two guide members, which are symmetrically arranged about the central axis of the abutment member, and each guide member is sleeved with a second elastic member; Two opposite ends of the abutment member are respectively sleeved on one of the guide members.

7. The nozzle structure according to claim 2, characterized in that: A first matching groove is formed on a side of the abutment member facing the nozzle assembly, wherein the first matching groove has two groove walls arranged at an angle, and the two groove walls are symmetrically arranged about the central axis of the nozzle assembly; When the abutment member is pressed against the nozzle assembly, the two groove walls are respectively in line contact or surface contact with the outer wall of the nozzle assembly.

8. The nozzle structure according to claim 1, characterized in that: The nozzle assembly comprises a first pipe and a second pipe connected along a first direction, wherein the first pipe is disposed through the heating assembly, and the second pipe is disposed through the heat dissipation assembly; The heating component is provided with a second assembly hole matched with the first pipe, and the hole wall of the second assembly hole is in contact with the outer surface of the first pipe; Wherein, the outer radial dimension of the first pipe piece gradually decreases in a direction approaching the second pipe piece.

9. The nozzle structure according to claim 8, characterized in that: A second matching groove is formed on the hole wall of the second assembly hole, and a limiting portion is formed on the first pipe member; The limiting portion is inserted into the second matching groove to limit the first pipe member passing through the heating component from rotating relative to the heating component.

10. The nozzle structure according to claim 8, characterized in that: The nozzle assembly further comprises a reinforcing pipe member sleeved outside the second pipe member, and the reinforcing pipe member is used for abutting against the fixing assembly.

11. The nozzle structure according to claim 8, characterized in that: The heating assembly includes a temperature-averaging element and a heating element; The heating element is constructed as a cylindrical structure sleeved outside the temperature-averaging element; The temperature-averaging component is spaced apart from the heat dissipation component, and the temperature-averaging component is used to transfer the heat of the heating component to the first pipe to heat the consumables passing through the first pipe; The second assembly hole is opened in the temperature equalizing member.

12. The nozzle structure according to claim 1, characterized in that: The nozzle structure also includes a heat insulation component; The heat insulation component is connected between the heat dissipation component and the heating component, and the heat insulation component includes a body and a plurality of connecting parts; The body is detachably connected to the heating assembly, and a third assembly hole matching the heating assembly is provided on the body; All the connecting members are arranged at intervals around the axis of the third assembly hole and are respectively connected between the body and the heat dissipation component to prevent heat from being transferred from the body or the heating component to the heat dissipation component.

13. The nozzle structure according to claim 12, characterized in that: The connecting member is detachably connected to the main body via a first fixing member, and a heat insulating member is sleeved on the first fixing member. The heat insulating member is arranged between the first fixing member and the main body to prevent heat from being transferred from the main body or the heating component to the first fixing member.

14. The nozzle structure according to claim 12, characterized in that: The thermal insulation assembly includes three connecting parts, and the central axes of the three connecting parts are respectively located on the corresponding vertices of the same isosceles triangle, and the geometric center of the isosceles triangle is located on the axis of the third assembly hole.

15. The nozzle structure according to claim 14, characterized in that: At least one of the connecting parts is a first connecting part, which is connected to the heat dissipation component via a second fixing part, and a third matching groove is provided at one end of the first connecting part connected to the heat dissipation component, and the third matching groove is constructed as an annular groove with a central axis in the first direction, and the second fixing part is threadedly connected to the heat dissipation component in a direction perpendicular to the first direction and abuts against the groove wall of the third matching groove.

16. The nozzle structure according to claim 14 or 15, characterized in that: Two of the connecting parts are second connecting parts, and the two second connecting parts are symmetrically arranged about the central axis of the isosceles triangle. The second connecting part includes a first connecting part and a second connecting part which are perpendicular to each other and connected as a whole, wherein the first connecting part is detachably connected to the main body through a first fixing part, and the first connecting part and the second connecting part are respectively at least partially embedded in the heat dissipation component and detachably connected to the heat dissipation component through a third fixing part.

17. The nozzle structure according to claim 12, characterized in that: The third assembly hole is a threaded hole threadedly connected to the heating component, and the main body is further provided with a fourth assembly hole penetrating the third assembly hole in a direction perpendicular to the first direction, and the fourth assembly hole is a threaded hole; The nozzle structure also includes a fourth fixing member, which is threadedly connected in the fourth assembly hole and abuts against the heating component.

18. A 3D printer, characterized in that: Comprising the nozzle structure according to any one of claims 1 to 17.

19. The 3D printer according to claim 18, wherein: The 3D printer also includes a base, and the heat dissipation component is connected to the base via a pressure collection member.

20. The 3D printer according to claim 19, wherein: The 3D printer further includes a limiting member, the heat dissipation component is further connected to the base through the limiting member, and the limiting member and the pressure collection member are respectively arranged at two ends of the heat dissipation component in the first direction; Wherein, the limiting member is threadedly connected to the base and penetrates into the heat dissipation assembly along the first direction.

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