Spray head unit and 3D printing equipment applying same

Abstract

The embodiment of the utility model provides a spray head unit and 3D printing equipment applying the same. The spray head unit comprises a frame body and a heat dissipation assembly; the frame body comprises a first fixing structure; the heat dissipation assembly comprises a second fixing structure; the heat dissipation assembly is detachably connected with the frame body, and the first fixing structure and the second fixing structure are configured to be in sliding fit. The 3D printing equipment comprises a forming platform, a driving assembly and the spray head unit, and the driving assembly drives the spray head unit to move relative to the forming platform.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing, in particular to a nozzle unit and a 3D printing device using the same. BACKGROUND

[0002] 3D printing technology is a rapid prototyping technology that uses special wax material, powdered metal or plastic and other adhesive materials to manufacture three-dimensional objects through layer-by-layer printing. The printing material is melted and extruded at the nozzle, and finally the molding is realized. The installation precision of the nozzle unit directly affects the printing precision. In the prior art, screws are usually used to lock the nozzle unit to ensure its installation precision. However, this installation method is relatively complex, and overly complex installation may cause installation errors, thereby reducing the printing precision. How to solve the above problems is a problem that needs to be considered by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems in the prior art, the embodiments of the present application provide a nozzle unit which is more convenient to disassemble and assemble, and a 3D printing device using the same.

[0004] The embodiments of the present application provide a nozzle unit, which comprises a frame body and a heat dissipation assembly; the frame body comprises a first fixing structure; the heat dissipation assembly comprises a second fixing structure; the heat dissipation assembly is detachably connected with the frame body, and the first fixing structure and the second fixing structure are configured to be in sliding fit.

[0005] In an embodiment, the second fixing structure is arranged at one end of the heat dissipation assembly along a first direction to lock the heat dissipation assembly along the first direction, and the sliding direction of the relative sliding between the first fixing structure and the second fixing structure intersects the first direction.

[0006] In an embodiment, the first fixing structure is formed with a first guide cavity, the second fixing structure comprises a first guide protrusion, the first guide protrusion is movably arranged in the first guide cavity, and the outer surface of the first guide protrusion at least partially abuts with the inner surface of the first guide cavity along the first direction.

[0007] In an embodiment, the first fixing structure comprises two first limiting arms, the two first limiting arms are arranged protruding towards the side where the heat dissipation assembly is located along the first direction, the two first limiting arms are both in a bent shape and cooperatively form the first guide cavity, and the heat dissipation assembly is clamped with the first limiting arms.

[0008] In an embodiment, the first limiting arm comprises a first connecting segment and a first bending segment, the first connecting segment is arranged along the first direction, the first bending segment is connected with the first connecting segment, each of the two first bending segments is bent towards the side where the other first limiting arm is located, and the two first connecting segments are arranged in a spaced manner.

[0009] In an embodiment, the first fixing structure comprises two second limiting arms, the first fixing structure is recessed from the side away from the heat dissipation assembly to form the first guide cavity along the first direction, the two second limiting arms are arranged in a facing manner from different sides of the first guide cavity, the extending direction of the second limiting arm intersects with the first direction, the two second limiting arms are arranged in a spaced manner, and the heat dissipation assembly is clamped with the second limiting arm.

[0010] In an embodiment, the first fixing structure comprises a second guide protrusion, the second fixing structure is formed with a second guide cavity, the second guide protrusion is movably arranged in the second guide cavity, and the outer surface of the second guide protrusion at least partially abuts with the inner surface of the second guide cavity along the first direction.

[0011] In an embodiment, the second fixing structure comprises two third limiting arms, the two third limiting arms are both in a bent shape and cooperatively form the second guide cavity, the third limiting arm comprises a third connecting segment and a third bending segment, the third connecting segment is arranged along the first direction, the third bending segment is connected with the third connecting segment, each of the two third bending segments is bent towards the side where the other third limiting arm is located, and the two third connecting segments are arranged in a spaced manner for clamping the second guide protrusion.

[0012] In an embodiment, the nozzle unit further comprises a mounting assembly, the mounting assembly comprises a movable piece and a connecting piece in a detachable connection, the connecting piece is connected with the frame body, and the movable piece is provided with a second locking structure; one end of the heat dissipation assembly along the first direction is provided with a first locking structure, the first locking structure and the second locking structure are detachably connected to lock the heat dissipation assembly along the first direction.

[0013] In an embodiment, the nozzle unit further comprises a nozzle assembly, which is connected with the heat dissipation assembly, so that the nozzle assembly is located on the side of the heat dissipation assembly away from the first fixing structure along the first direction.

[0014] The application further provides a 3D printing device, which comprises a forming platform, a driving assembly and the nozzle unit according to any one of the preceding embodiments, wherein the driving assembly drives the nozzle unit to move relative to the forming platform.

[0015] Further, in the nozzle unit, the frame body comprises a first fixing structure, the heat dissipation assembly comprises a second fixing structure, and the first fixing structure and the second fixing structure are configured to be in sliding fit, so that the frame body and the heat dissipation assembly can be conveniently installed, and the installation convenience is improved; meanwhile, the frame body and the heat dissipation assembly are detachably connected, and after the first fixing structure and the second fixing structure are in sliding fit, the frame body and the heat dissipation assembly can be connected; in the subsequent alignment process of the 3D printing device, when the nozzle unit is touched, the first fixing structure and the second fixing structure can lock the heat dissipation assembly in the touching direction, so that the heat dissipation assembly is prevented from being inclined or deviated as much as possible, and the printing precision of the nozzle unit in the subsequent use process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a perspective view of a nozzle unit according to an embodiment of the application.

[0017] Figure 2 FIG. 2 is another perspective view of the nozzle unit according to the embodiment of the application.

[0018] Figure 3 FIG. 3 is a sectional view of the nozzle unit according to the embodiment of the application.

[0019] Figure 4 FIG. 4 is another sectional view of the nozzle unit according to the embodiment of the application.

[0020] Figure 5 FIG. 5 is a structural schematic view of a nozzle unit according to another embodiment of the application.

[0021] Figure 6 FIG. 6 is a structural schematic view of a nozzle unit according to still another embodiment of the application.

[0022] Figure 7 FIG. 7 is a state schematic view of an installation assembly of the nozzle unit according to the embodiment of the application.

[0023] Figure 8 FIG. 8 is a state schematic view of an installation assembly of the nozzle unit according to another embodiment of the application.

[0024] Figure 9 A three-dimensional schematic view of a 3D printing device provided for embodiments of the present application.

[0025] Main element symbol explanation

[0026] Nozzle unit 10

[0027] Transmission channel 100

[0028] Gap 1000

[0029] Frame body 11

[0030] Housing portion 110

[0031] Accommodation space 1100

[0032] First fixing structure 111

[0033] First guide cavity 1110

[0034] First limiting arm 1111

[0035] First connecting segment 11111

[0036] First bending segment 11112

[0037] Second limiting arm 1112

[0038] First opening 1113

[0039] Second opening 1114

[0040] Second guide protrusion 1115

[0041] Second guide strip 11151

[0042] Second connecting strip 11152

[0043] Avoidance cavity 1116

[0044] Heat dissipation assembly 12

[0045] Heat dissipation main body 120

[0046] Second fixing structure 121

[0047] Second guide cavity 1210

[0048] Third limiting arm 1211

[0049] Third connecting segment 12111

[0050] Third bending segment 12112

[0051] First guide protrusion 1212

[0052] First guide bar 12121

[0053] First connecting bar 1213

[0054] Third opening 1214

[0055] Fourth opening 1215

[0056] First locking structure 122

[0057] Radiating blade 123

[0058] Nozzle assembly 13

[0059] Mounting assembly 14

[0060] Movable piece 141

[0061] First connecting arm 1411

[0062] First end 14111

[0063] Second connecting arm 1412

[0064] Clamping protrusion 14121

[0065] Connecting piece 142

[0066] Mounting hole 1420

[0067] First extending part 1421

[0068] Rotating groove 14211

[0069] Second extending part 1422

[0070] Clamping groove 14221

[0071] Supporting step 14223

[0072] Connecting plate 1423

[0073] Latch 1425

[0074] Second locking structure 143

[0075] Upper locking bar 1431

[0076] Lower locking bar 1432

[0077] Clamping piece 1433

[0078] 3D printing device 1

[0079] Extrusion assembly 15

[0080] Material breaking assembly 16

[0081] Drive assembly 17

[0082] Forming platform 18

[0083] First direction Z

[0084] Second direction Y

[0085] Third direction X

[0086] The following detailed description will further describe the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0087] The following description will refer to the accompanying drawings to more fully describe the present application. The drawings show exemplary embodiments of the present application. However, the present application can be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like components throughout the specification. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" and / or "said" are used in the detailed description and / or claims, such terms are intended to be inclusive (i.e., in a manner that says that one), unless explicitly indicated to the contrary. As used herein, unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. Furthermore, unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this application belongs. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0088] Generally, 3D printing technology is a rapid prototyping technology that uses special wax material, powdered metal or plastic and other adhesive materials as the basis for digital model files, and three-dimensional objects are manufactured by printing layer by layer of materials. The printing material is melted and extruded at the nozzle, and finally the forming is realized; the installation precision of the nozzle unit directly affects its printing precision, and in the prior art, the nozzle unit is usually installed by screw locking and the like to ensure its installation precision, but such installation method is relatively complex, and too complex installation may cause installation error to occur, thereby causing the printing precision to decrease. How to solve the above problems is a consideration for those skilled in the art.

[0089] Correspondingly, embodiments of the present application provide a nozzle unit and a 3D printing device using the same. The nozzle unit includes a frame and a heat dissipation assembly; the frame includes a first fixing structure; the heat dissipation assembly includes a second fixing structure; the heat dissipation assembly is detachably connected to the frame, and the first fixing structure and the second fixing structure are configured to slide together. The 3D printing device includes a build platform, a drive assembly, and the nozzle unit; the drive assembly drives the nozzle unit to move relative to the build platform.

[0090] Furthermore, in the nozzle unit of the present application, the frame includes a first fixing structure, and the heat dissipation component includes a second fixing structure. The first fixing structure and the second fixing structure are constructed to slide together, which can realize convenient installation between the frame and the heat dissipation component bracket, thereby improving the convenience of installation. At the same time, the frame and the heat dissipation component are detachably connected, and the connection can be achieved after the first fixing structure and the second fixing structure slide together. During the subsequent alignment process of the 3D printing device, the nozzle unit is touched. The first fixing structure and the second fixing structure can lock the heat dissipation component along the touching direction, so as to minimize the tilting or offset of the heat dissipation component, which can improve the printing accuracy of the nozzle unit during subsequent use.

[0091] 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.

[0092] 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.

[0093] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0094] like Figures 1 to 4 As shown, an embodiment of the present application provides a nozzle unit 10, which includes a frame 11, a heat dissipation assembly 12, and a nozzle assembly 13. The frame 11 includes a first fixing structure 111; the heat dissipation assembly 12 is detachably connected to the frame 11, and a second fixing structure 121 is provided at one end of the heat dissipation assembly 12 along a first direction Z. The second fixing structure 121 and the first fixing structure 111 are configured to slide together to lock the heat dissipation assembly 12 along the first direction Z; the nozzle assembly 13 is connected to the heat dissipation assembly 12 so that the nozzle assembly 13 is located on the side of the heat dissipation assembly 12 away from the first fixing structure 111 along the first direction Z.

[0095] It can be understood that the nozzle unit 10 of the present application, the nozzle assembly 13 is connected with the heat dissipation assembly 12, the nozzle assembly 13 is located on the side away from the first fixed structure 111 of the heat dissipation assembly 12 along the first direction Z, and the consumables can be transmitted and printing is completed along the first direction Z. The frame body 11 can be a main support bracket of the nozzle unit 10; the nozzle assembly 13 can be used for melting and extruding the consumables, and the heat dissipation assembly 12 can be used for dissipating heat for the nozzle assembly 13. The heat dissipation assembly 12 is connected to one side of the frame body 11 along the first direction Z, the nozzle assembly 13 is connected to the same side of the frame body 11 along the first direction Z with the heat dissipation assembly 12, and the nozzle assembly 13 is connected to the frame body 11 through the heat dissipation assembly 12. The nozzle assembly 13, the heat dissipation assembly 12, and at least part of the frame body 11 connected with the heat dissipation assembly 12 have an arrangement relationship along the first direction Z, and by locking the two ends of the heat dissipation assembly 12 located in the middle along the first direction Z, the offset of the heat dissipation assembly 12 in the first direction Z can be reduced, and the installation stability and printing stability of the nozzle assembly 13 can be improved.

[0096] It can be understood that in the alignment process of the 3D printing device 1, the nozzle unit 10 is driven along the first direction Z, so that the nozzle assembly 13 is touched, and at the same time, the heat dissipation assembly 12 and the frame body 11 are extruded by external force. The frame body 11 and the heat dissipation assembly 12 are detachably connected through the first fixed structure 111 and the second fixed structure 121 to lock the heat dissipation assembly 12 along the first direction Z, so as to avoid the heat dissipation assembly 12 from tilting or offsetting along the first direction Z, thereby avoiding the nozzle assembly 13 connected therewith from tilting or offsetting along the first direction Z. By strengthening the firmness of the nozzle unit 10 along the first direction Z, the printing accuracy of the nozzle unit 10 in the subsequent use process can be improved.

[0097] At the same time, the frame body 11 and the heat dissipation assembly 12 are detachably connected through the first fixed structure 111 and the second fixed structure 121, so that the convenient installation between the frame body 11 and the heat dissipation assembly 12 support can be realized.

[0098] For the convenience of understanding, the first direction Z, the second direction Y and the third direction X are introduced in the embodiments of the present application for description, the first direction Z, the second direction Y and the third direction X are three mutually non-parallel directions in a spatial coordinate system; in the subsequent embodiments, the first direction Z, the second direction Y and the third direction X are taken as three mutually perpendicular reference directions in a three-dimensional Cartesian coordinate system as an example for description, the directions shown in the embodiments of the present application are used to help understand the mutual positional relationship of the parts, but the specific directions are not limited.

[0099] In an embodiment, the first fixed structure 111 and the second fixed structure 121 are slidingly connected, and the sliding direction of the relative sliding of the first fixed structure 111 and the second fixed structure 121 intersects the first direction Z.

[0100] In the embodiment, the sliding direction of the relative sliding between the first fixing structure 111 and the second fixing structure 121 is the second direction Y, which can be any direction in a plane perpendicular to the first direction Z.

[0101] It can be understood that the first fixing structure 111 and the second fixing structure 121 can be arranged to be relatively slidable along the second direction Y, so that the frame body 11 and the heat dissipation assembly 12 can be quickly disassembled. Meanwhile, the second direction Y intersects the first direction Z, so that the first fixing structure 111 and the second fixing structure 121 arranged to be relatively slidable along the first direction Z have a relative position relationship of mutual abutment, and the heat dissipation assembly 12 can be locked along the first direction Z.

[0102] In an embodiment, the frame body 11 includes a housing portion 110, and the first fixing structure 111 is included in the housing portion 110. The housing portion 110 can have an accommodation space 1100 inside, which can accommodate an extrusion assembly 15 for extruding a consumable and a cutting assembly 16 for cutting the consumable. The transmission channel 100 can pass through the extrusion assembly 15, the heat dissipation assembly 12 and the nozzle assembly 13 in sequence along the first direction Z; and the transmission channel 100 can be arranged in two parts, and the transmission channel 100 arranged in the extrusion assembly 15 and the transmission channel 100 arranged in the heat dissipation assembly 12 are constructed to be arranged at intervals and have a gap 1000, and the cutting assembly 16 is arranged corresponding to the gap 1000 and used for cutting the consumable exposed through the gap 1000.

[0103] It can be understood that the transmission channel 100 arranged in two parts can ensure that the cutting assembly 16 can effectively cut the consumable, and can also enable the transmission channel 100 arranged in the heat dissipation assembly 12 to be pre-installed with the heat dissipation assembly 12, and then be positioned after the installation of the heat dissipation assembly 12 is completed.

[0104] In an embodiment, the heat dissipation assembly 12 includes a heat dissipation body 120, a second fixing structure 121 and a first locking structure 122, and the second fixing structure 121 and the first locking structure 122 are respectively located at two ends of the heat dissipation body 120 along the first direction Z. The heat dissipation body 120 can be provided with a plurality of heat dissipation fins 123 for improving the heat dissipation efficiency. It can be understood that the second fixing structure 121 and the first locking structure 122 can be synchronously manufactured and / or integrally formed with the heat dissipation body 120; or the second fixing structure 121 and the first locking structure 122 can be the heat dissipation fins 123 themselves.

[0105] In an embodiment, the first fixing structure 111 is formed with a first guide cavity 1110, and the second fixing structure 121 comprises a first guide protrusion 1212. The first guide protrusion 1212 is movably arranged in the first guide cavity 1110, and an outer surface of the first guide protrusion 1212 at least abuts with an inner surface of the first guide cavity 1110 along the first direction Z.

[0106] In the embodiment, the first guide cavity 1110 is configured to extend along the second direction Y, so that the first guide protrusion 1212 can slide in the first guide cavity 1110 along the second direction Y. Meanwhile, the first guide cavity 1110 has an inner surface along the first direction Z, so that the outer surface of the first guide protrusion 1212 can abut with the inner surface of the first guide cavity 1110 along the first direction Z.

[0107] In the embodiment, the first fixing structure 111 is formed with a first opening 1113, the first opening 1113 is arranged along the first direction Z, and the first guide cavity 1110 is in communication with the first opening 1113. The first guide cavity 1110 also has a width along the third direction X, and the width of the first opening 1113 along the third direction X is smaller than the inner diameter of the first guide cavity 1110 along the third direction X. Thus, the first guide protrusion 1212 can be connected with the part of the heat dissipation assembly 12 outside the first guide cavity 1110 when arranged in the first guide cavity 1110, so as to realize the connection between the frame body 11 and the heat dissipation assembly 12.

[0108] In the embodiment, the first fixing structure 111 is formed with a second opening 1114, the second opening 1114 is arranged along the second direction Y, and the first guide cavity 1110 is in communication with the second opening 1114, so as to enable the first guide protrusion 1212 to slide in or out of the first guide cavity 1110 along the second direction Y.

[0109] In the embodiment, the first guide protrusion 1212 comprises two first guide strips 12121, and the two first guide strips 12121 are respectively arranged to protrude to two sides along the third direction X. The second fixing structure 121 further comprises a first connecting strip 1213 connected with the first guide protrusion 1212. The first connecting strip 1213 is connected with the middle section of the first guide protrusion 1212 along the third direction X, and the first connecting strip 1213 is arranged on the side of the first guide protrusion 1212 close to the nozzle assembly 13 along the first direction Z. The width of the first connecting strip 1213 along the third direction X is smaller than the width of the first guide protrusion 1212 along the third direction X, and the first connecting strip 1213 can be arranged at the first opening 1113.

[0110] In an embodiment, the first guide cavity 1110 has a substantially rectangular cross-sectional shape corresponding to the plane formed by the first direction Z and the third direction X, and the first guide protrusion 1212 has a cross-sectional shape corresponding to the plane formed by the first direction Z and the third direction X that is similar or identical to the cross-sectional shape of the first guide cavity 1110. The inner diameter of the first guide cavity 1110 along the first direction Z is substantially the same as the outer diameter of the first guide protrusion 1212 along the first direction Z. When the first guide protrusion 1212 is arranged in the first guide cavity 1110, the two outer surfaces of the first guide protrusion 1212 along the first direction Z are respectively in abutment with the two inner surfaces of the first guide cavity 1110 along the first direction Z, so as to avoid relative displacement of the heat dissipation assembly 12 with respect to the frame 11 along the first direction Z, thereby locking the heat dissipation assembly 12 along the first direction Z.

[0111] In an embodiment, the side of the first fixing structure 111 away from the second fixing structure 121 along the first direction Z is further provided with an avoiding cavity 1116. The avoiding cavity 1116 extends along the first direction Z and penetrates the second guide protrusion 1115 along the second direction Y. The avoiding cavity 1116 is in communication with the first guide cavity 1110. The nozzle unit 10 further comprises a transmission channel 100 for transmitting consumables. At least part of the transmission channel 100 penetrates the heat dissipation assembly 12 and the nozzle assembly 13 along the first direction Z, and part of the transmission channel 100 protrudes from the end of the heat dissipation assembly 12 away from the nozzle assembly 13 along the third direction X. The avoiding cavity 1116 is used for avoiding the part of the transmission channel 100 to interfere with the quick installation of the heat dissipation assembly 12 and the frame 11.

[0112] In an embodiment, the first fixing structure 111 comprises two first limiting arms 1111. The two first limiting arms 1111 protrude towards the side where the heat dissipation assembly 12 is located along the first direction Z. The two first limiting arms 1111 are both in a bent shape and cooperatively form the first guide cavity 1110. The heat dissipation assembly 12 is in clamping connection with the first limiting arms 1111.

[0113] In an embodiment, the first limiting arm 1111 comprises a first connecting segment 11111 and a first bent segment 11112. The first connecting segment 11111 is arranged along the first direction Z, and the first bent segment 11112 is connected with the first connecting segment 11111. The two first bent segments 11112 are respectively bent towards the side where the other first limiting arm 1111 is located, and the two first connecting segments 11111 are arranged in a spaced manner.

[0114] In the embodiment, the first guiding cavity 1110 is formed by the first limiting arms 1111 protruding from the first fixing structure 111. The first opening 1113 is formed on at least one side of the first guiding cavity 1110 along the second direction Y. The second opening 1114 is formed by the two first connecting segments 11111.

[0115] In other embodiments, the first connecting segments 11111 and the first bending segments 11112 can also be connected in a curved manner.

[0116] Further combining Figure 5 As shown, in an embodiment, the first fixing structure 111 includes two second limiting arms 1112. The first guiding cavity 1110 is formed by the first fixing structure 111 recessed from the side away from the heat dissipation assembly 12 along the first direction Z. The two second limiting arms 1112 extend from the different sides of the first guiding cavity 1110. The extending direction of the second limiting arms 1112 intersects with the first direction Z. The two second limiting arms 1112 are spaced apart. The heat dissipation assembly 12 is connected with the second limiting arms 1112.

[0117] In the embodiment, the first guiding cavity 1110 is formed by the frame body 11 recessed. The two second limiting arms 1112 are spaced apart along the first direction Z. The two second limiting arms 1112 are both located on the side of the first guiding cavity 1110 closer to the heat dissipation assembly 12 or the nozzle assembly 13 along the first direction Z.

[0118] Further combining Figure 6 As shown, in an embodiment, the first fixing structure 111 includes a second guiding protrusion 1115. The second fixing structure 121 forms a second guiding cavity 1210. The second guiding protrusion 1115 is movably arranged in the second guiding cavity 1210. The outer surface of the second guiding protrusion 1115 at least partially abuts with the inner surface of the second guiding cavity 1210 along the first direction Z.

[0119] In the embodiment, the second guiding protrusion 1115 includes two second guiding strips 11151. The two second guiding strips 11151 protrude to the two sides along the third direction X, respectively. The first fixing structure 111 further includes a second connecting strip 11152 connected with the second guiding protrusion 1115. The second connecting strip 11152 is connected with the middle segment of the second guiding protrusion 1115 along the third direction X. The two second guiding strips 11151 are located on the two sides of the second connecting strip 11152 along the third direction X, respectively. The second connecting strip 11152 is arranged on the side of the second guiding protrusion 1115 away from the nozzle assembly 13. The width of the second connecting strip 11152 along the third direction X is smaller than the width of the second guiding protrusion 1115 along the third direction X.

[0120] In an embodiment, the second fixing structure 121 comprises two third limiting arms 1211, each of which is in a bent shape and cooperates with the other to form a second guide cavity 1210. The third limiting arm 1211 comprises a third connecting segment 12111 and a third bent segment 12112. The third connecting segment 12111 is arranged along the first direction Z, and the third bent segment 12112 is connected to the third connecting segment 12111. Each of the two third bent segments 12112 is bent towards the side where the other third limiting arm 1211 is located. The two third connecting segments 12111 are arranged in a spaced manner for clamping the second guide protrusion 1115.

[0121] In the embodiment, the second guide cavity 1210 is arranged to extend along the second direction Y, so that the second guide protrusion 1115 can slide along the second direction Y in the second guide cavity 1210. Meanwhile, the second guide cavity 1210 has an inner surface along the first direction Z, so that the outer surface of the second guide protrusion 1115 can abut against the inner surface of the second guide cavity 1210 along the first direction Z.

[0122] In the embodiment, the second fixing structure 121 is provided with a third opening 1214, which is arranged to penetrate along the first direction Z, and the second guide cavity 1210 communicates with the third opening 1214. The second guide cavity 1210 also has a certain width along the third direction X, and the width of the third opening 1214 along the third direction X is smaller than the inner diameter of the second guide cavity along the third direction X. Thus, when the second guide protrusion 1115 is arranged in the second guide cavity 1210, it can be connected to the part of the heat dissipation assembly 12 located outside the second guide cavity 1210, thereby realizing the connection between the frame body 11 and the heat dissipation assembly 12.

[0123] In the embodiment, the second fixing structure 121 is provided with a fourth opening 1215, which is arranged to penetrate along the second direction Y, and the second guide cavity 1210 communicates with the fourth opening 1215, for enabling the second guide protrusion 1115 to slide in or out of the second guide cavity 1210 along the second direction Y.

[0124] In an embodiment, the second guide cavity 1210 has a substantially rectangular cross-sectional shape corresponding to the first direction Z and the third direction X, and the second guide protrusion 1115 has a similar or identical rectangular cross-sectional shape corresponding to the first direction Z and the third direction X. The inner diameter of the second guide cavity 1210 along the first direction Z is substantially the same as the outer diameter of the second guide protrusion 1115 along the first direction Z. When the second guide protrusion 1115 is arranged in the second guide cavity 1210, the two outer surfaces of the second guide protrusion 1115 along the first direction Z are respectively in contact with the two inner surfaces of the second guide cavity 1210 along the first direction Z, so as to avoid relative displacement of the heat dissipation assembly 12 along the first direction Z relative to the frame 11, thereby locking the heat dissipation assembly 12 along the first direction Z.

[0125] In an embodiment, the first fixing structure 111 further has an avoiding cavity 1116 on the side away from the second fixing structure 121 along the first direction Z. The avoiding cavity 1116 extends along the first direction Z and penetrates the second guide protrusion 1115 along the second direction Y. At least part of the transmission channel 100 penetrates the heat dissipation assembly 12 and the nozzle assembly 13 along the first direction Z, and part of the transmission channel 100 protrudes from the heat dissipation assembly 12 away from the nozzle assembly 13 along the first direction Z. The avoiding cavity 1116 is used to avoid interference of the part of the transmission channel 100 with the heat dissipation assembly 12 and the frame 11 during rapid installation.

[0126] Further combining Figure 4 、 Figure 7 and Figure 8 , in an embodiment, the nozzle unit 10 further includes a mounting assembly 14 including a movable member 141 and a connecting member 142. The connecting member 142 is connected to the frame 11, and the movable member 141 is provided with a second locking structure 143. The heat dissipation assembly 12 is provided with a first locking structure 122 at one end along the first direction Z, and the first locking structure 122 is detachably connected to the second locking structure 143 to lock the heat dissipation assembly 12 along the first direction Z.

[0127] In the present embodiment, the first locking structure 122 protrudes from the heat dissipation body 120, i.e., the first locking structure 122 is protrudingly arranged relative to the heat dissipation body 120. Correspondingly, the second locking structure 143 is formed on the side of the movable member 141 facing the heat dissipation assembly 12, and the second locking structure 143 is formed with a groove capable of accommodating the first locking structure 122. The movable member 141 can be moved to contact the heat dissipation assembly 12 and make the first locking structure 122 and the second locking structure 143 engaged. After the engagement is completed, at least one side of the first locking structure 122 along the first direction Z is tightly pressed by the second locking structure 143 to lock the heat dissipation assembly 12 along the first direction Z.

[0128] In an embodiment, the connecting piece 142 comprises a connecting plate 1423, a first extending part 1421 and a second extending part 1422, the first extending part 1421 and the second extending part 1422 are arranged apart from each other and connected with the connecting plate 1423. The first connecting arm 1411 is rotationally connected with the first extending part 1421, and the second connecting arm 1412 is detachably connected with the second extending part 1422. The connecting plate 1423, the first extending part 1421, the second extending part 1422 and the movable piece 141 enclose a mounting hole 1420, and the nozzle assembly 13 is arranged through the mounting hole 1420.

[0129] In an embodiment, the first connecting arm 1411 is rotationally connected with the first extending part 1421, and the second connecting arm 1412 is detachably connected with the second extending part 1422. A clamping groove 14221 is arranged on the side of the second extending part 1422 away from the first extending part 1421, and the clamping groove 14221 is recessed towards the side of the first extending part 1421. A clamping protrusion 14121 is arranged on the side of the second connecting arm 1412 facing the first extending part 1421. When the first connecting arm 1411 is rotated to be capable of contacting the second extending part 1422, the second connecting arm 1412 moves to the side of the second extending part 1422 away from the first extending part 1421 and contacts the surface of the second extending part 1422 away from the first extending part 1421. The first connecting arm 1411 and the second connecting arm 1412 both have a certain deformation ability, and the second connecting arm 1412 and the second extending part 1422 are configured to achieve clamping in a tight fit manner.

[0130] It can be understood that the clamping protrusion 14121 can have a circular-arc-shaped protruding surface, the clamping groove 14221 has a circular-arc-shaped recessed surface matching the shape of the clamping protrusion 14121, and the first connecting arm 1411 and the second connecting arm 1412 have a certain elastic deformation ability, so that the first connecting arm 1411 and the second connecting arm 1412 can achieve clamping and dismounting of the second connecting arm 1412 and the second extending part 1422 through slight deformation. At the same time, the second connecting arm 1412 and the second extending part 1422 arranged in a tight fit manner can have better connecting effect.

[0131] In an embodiment, the first extending part 1421 is provided with a rotating groove 14211, and the first connecting arm 1411 comprises a first end part 14111, which is accommodated in the rotating groove 14211. The first end part 14111 and the first extending part 1421 are connected by a pin 1425, and the first end part 14111 is configured to be rotationally arranged in the rotating groove 14211 with the pin 1425 as the axis. The second extending part 1422 comprises a supporting step 14223 for supporting the first connecting arm 1411.

[0132] In the embodiment, the rotating groove 14211 is located on the side away from the connecting piece 142 compared with the supporting step 14223. Meanwhile, the movable piece 141 supported by the supporting step 14223 is also configured to be spaced apart from the nozzle assembly 13, so as to avoid excessive heat of the nozzle assembly 13 from being transferred to the movable piece 141, and avoid the temperature of the movable piece 141 from being too high.

[0133] In an embodiment, the first extending part 1421 and the second extending part 1422 are located on the same side of the connecting plate 1423 away from the frame body 11, the first connecting arm 1411 is located on the side of the first extending part 1421 and the second extending part 1422 away from the connecting plate 1423, and the second connecting arm 1412 is located between the first connecting arm 1411 and the connecting plate 1423. For example Figure 7 As shown, the second locking structure 143 is located on the side of the second connecting arm 1412 toward the mounting hole 1420, and the second locking structure 143 includes the upper locking strip 1431 and the integral lower locking strip 1432. In other embodiments, one of the upper locking strip 1431 or the lower locking strip 1432 can also be split type, for example Figure 8 As shown, the lower locking strip 1432 includes two spaced-apart clamping pieces 1433. The split lower locking strip 1432 should have good heat insulation effect, so as to avoid excessive heat of the nozzle assembly 13 from being transferred to the movable piece 141, and avoid the temperature of the movable piece 141 from being too high.

[0134] It can be understood that the movable piece 141 can be spaced apart from the nozzle assembly 13 along the first direction Z, or the second locking structure 143 is spaced apart from the nozzle assembly 13 along the first direction Z. Avoiding the heat generated by the nozzle assembly 13 in the work from being directly transferred to the heat dissipation assembly 12 through the movable piece 141 (for example, the second locking structure 143 and the first locking structure 122 connected and arranged), and improving the respective thermal efficiency of the nozzle assembly 13 and the heat dissipation assembly 12.

[0135] Further combining Figure 9 As shown, the application also provides a 3D printing device 1, which includes a forming platform 18, a driving assembly 17, and a nozzle unit 10 according to any one of the preceding embodiments. The driving assembly 17 drives the nozzle unit 10 to move relative to the forming platform 18.

[0136] In the foregoing, the specific embodiments of the application are described with reference to the accompanying drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the application without departing from the spirit and scope of the application. These changes and replacements are all within the scope defined by the application.

Claims

1. A showerhead unit, characterized by, The application relates to a heat dissipation device for a spray head unit. The heat dissipation device comprises a frame body and a heat dissipation assembly. The frame body comprises a first fixing structure. The heat dissipation assembly comprises a second fixing structure.

2. The showerhead assembly of claim 1, wherein, The heat dissipation assembly is detachably connected with the frame body.

3. The showerhead assembly of claim 2, wherein, The first fixing structure and the second fixing structure are configured to be in sliding fit.

4. The showerhead assembly of claim 3, wherein, The second fixing structure is arranged at one end of the heat dissipation assembly along a first direction to lock the heat dissipation assembly along the first direction.

5. The showerhead assembly of claim 4, wherein: The first fixing structure is formed with a first guide cavity.

6. The showerhead assembly of claim 3, wherein: The second fixing structure comprises a first guide protrusion.

7. The showerhead assembly of claim 2, wherein, The first guide protrusion is movably arranged in the first guide cavity.

8. The showerhead assembly of claim 7, wherein, The outer surface of the first guide protrusion at least partially abuts the inner surface of the first guide cavity along the first direction.

9. The showerhead assembly of claim 2, wherein, The first fixing structure comprises two first limiting arms. The two first limiting arms are arranged on the side of the heat dissipation assembly along the first direction. The two first limiting arms are in bending shape and cooperatively form the first guide cavity.

10. The showerhead assembly of claim 1, wherein, The heat dissipation assembly is clamped with the first limiting arms. The first limiting arm comprises a first connecting segment and a first bending segment. The first connecting segment is arranged along the first direction. The first bending segment is connected with the first connecting segment. The two first bending segments are respectively bent towards the side of the other first limiting arm. The two first connecting segments are arranged in a spaced manner. The first fixing structure comprises two second limiting arms. The first fixing structure is recessed to form the first guide cavity from the side of the heat dissipation assembly along the first direction. The two second limiting arms are arranged in a facing manner from the different sides of the first guide cavity. The extending direction of the second limiting arm intersects with the first direction. The two second limiting arms are arranged in a spaced manner. The heat dissipation assembly is clamped with the second limiting arms. The first fixing structure comprises a second guide protrusion. The second fixing structure is formed with a second guide cavity. The second guide protrusion is movably arranged in the second guide cavity. The outer surface of the second guide protrusion at least partially abuts the inner surface of the second guide cavity along the first direction. The second fixing structure comprises two third limiting arms. The two third limiting arms are in bending shape and cooperatively form the second guide cavity. The third limiting arm comprises a third connecting segment and a third bending segment. The third connecting segment is arranged along the first direction. The third bending segment is connected with the third connecting segment. The two third bending segments are respectively bent towards the side of the other third limiting arm. The two third connecting segments are arranged in a spaced manner to clamp the second guide protrusion. The spray head unit further comprises a mounting assembly. The mounting assembly comprises a movable piece and a connecting piece. The connecting piece is connected with the frame body. The movable piece is provided with a second locking structure. The heat dissipation assembly is provided with a first locking structure at one end along the first direction. The first locking structure is detachably connected with the second locking structure to lock the heat dissipation assembly along the first direction. The spray head unit further comprises A nozzle assembly is connected with the heat dissipation assembly, so that the nozzle assembly is located on the side of the heat dissipation assembly away from the first fixed structure in a first direction.

11. A 3D printing device, characterized by The method comprises the steps of: providing a molding platform, a driving assembly and a nozzle unit as claimed in any one of claims 1 to 10, and driving the nozzle unit to move relative to the molding platform by the driving assembly.

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