Rapidly-detached spray head mechanism

Abstract

The utility model discloses a spray head mechanism capable of being disassembled quickly, which comprises a heat dissipation assembly and a nozzle assembly, the nozzle assembly comprises a nozzle, a heat conduction block and a throat pipe, the heat conduction block surrounds part of the throat pipe, the heat dissipation assembly is positioned above the heat conduction block, surrounds part of the throat pipe and comprises a front heat dissipation sheet and a rear heat dissipation sheet, and the front heat dissipation sheet is positioned above the heat conduction block. And the front radiating fin and the rear radiating fin are hinged and attracted by a magnet. The heat dissipation assembly dissipates heat of the throat pipe. The heat dissipation assembly and the nozzle assembly are made into a split detachable structure, compared with the situation that the heat dissipation assembly and the nozzle assembly are integrated, only the nozzle assembly needs to be replaced when the plug is blocked, more convenience is achieved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of 3D printing, and in particular relates to a quick-disassembly nozzle mechanism. Background Art

[0002] 3D printer (also known as three-dimensional printer or stereo printer) is a rapid prototyping process equipment.

[0003] The 3D printing technology currently available for 3D printers is fused deposition modeling (FDM). FDM is a technology that constructs three-dimensional objects by printing layer by layer based on digital models using materials such as powdered metal or plastic.

[0004] In actual applications, a 3D printer using FDM technology uses a feeding mechanism to supply hot-melt filamentary materials to the hot end of the 3D printer, where the hot-melt filamentary materials are heated to a molten state. The hot end can extrude the molten material onto the printing panel while moving along the printing path of the 3D printer, printing a 3D object layer by layer.

[0005] The hot end usually includes the heat dissipation area, the throat area, and the heating area, among which the throat has a heat insulation effect. In actual applications, the hot end is prone to blockage and flow problems as the use time increases, and needs to be replaced as a whole. At present, the replacement of the hot end is inconvenient and costly, which has caused great trouble to users and maintenance personnel. Utility Model Content

[0006] The utility model aims to provide a quick-disassembly nozzle mechanism, which can be effectively and quickly disassembled, improve the stress of the throat pipe and prolong the service life.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A quick-detachable nozzle mechanism comprises a heat dissipation assembly and a nozzle assembly, wherein the nozzle assembly comprises a nozzle, a heat conductive block and a throat, wherein the heat conductive block surrounds a portion of the throat, the heat dissipation assembly is located above the heat conductive block, and the heat dissipation assembly surrounds a portion of the throat, and the heat dissipation assembly comprises a front heat dissipation fin and a rear heat dissipation fin, which are hinged and magnetically attracted.

[0009] The heat dissipation component dissipates heat from the throat. By making the heat dissipation component and the nozzle component into separate detachable structures, compared with the case where the heat dissipation component and the nozzle component are integrated, only the nozzle component needs to be replaced when a blockage occurs, which is more convenient and reduces maintenance costs.

[0010] Furthermore, the front heat sink and the rear heat sink are both provided with throat installation grooves and magnets, and the magnets provided on the front heat sink and the rear heat sink attract each other to clamp the throat.

[0011] The front heat sink and the rear heat sink can be opened and closed by being hinged, and closed adsorption is achieved by magnets. In the closed state, the front heat sink and the rear heat sink clamp the throat.

[0012] Furthermore, the quick-detachable nozzle mechanism also includes a fixing assembly and a heating device. The heating device contacts the heat-conducting block to heat the nozzle through the heat-conducting block. The nozzle assembly is detachably mounted on the fixing assembly and fixed by a fixing buckle.

[0013] The heat-conducting block is a metal with high thermal conductivity. After the heating device generates heat, the heat is transferred to the heat-conducting block to heat the throat. Usually, the installation of the nozzle mechanism is selected to be fixedly connected to the nozzle assembly in the heat dissipation area, so that the nozzle mechanism becomes a long cantilever structure, in which the throat is the weakest part of the structure, so the force-bearing capacity of the throat is also required to be high. In the present application, since the throat is surrounded by the heat-conducting block and fixed to the fixed assembly, the force it is subjected to is absorbed by the fixed assembly, thereby improving the stress on the throat and extending the service life. In addition, the nozzle assembly and the fixed assembly are fixed by a fixing buckle, which can be quickly disassembled and easily replaced.

[0014] Furthermore, the fixing assembly includes a fixing base, a fixing buckle holder is fixed to the fixing base, and the quick-detachable nozzle mechanism also includes an elastic device, the fixing buckle holder is provided with an installation groove, the elastic device is located in the installation groove, and the elastic device abuts against the heating device.

[0015] The elastic device is placed in the mounting groove of the fixing buckle holder and provides elastic force to be applied to the heating device, so that the heating device can be effectively contacted with the heat conductive block and efficient heat conduction can be achieved.

[0016] Furthermore, the fixing buckle holder is provided with a fixed rotating shaft, the fixing buckle is hinged to the fixed rotating shaft on one side, and the fixing buckle and the fixed rotating shaft on the other side are fastened by elastic deformation.

[0017] The cooperation of the fixing buckle and the fixing buckle holder realizes the fixation of the nozzle assembly.

[0018] Furthermore, the heat conducting block is provided with a limiting step, and the fixing buckle holder is provided with a limiting groove, and the limiting step matches the limiting groove.

[0019] When installing the nozzle assembly, align the limiting step with the limiting groove to achieve a limiting effect.

[0020] Furthermore, the fixed buckle seat is also provided with a limiting portion and a heating device installation slot, the limiting portions are respectively arranged at four corners above the heating device installation slot, and the heating device is installed between the heating device installation slot and the limiting portion.

[0021] The heating device installation groove is used to install the heating device, and the limiting part is used to limit the movement of the heating device.

[0022] Furthermore, the fixed buckle seat is also provided with a reference surface, which is located at the top of the heating device installation groove. When the heating device is located in the heating device installation groove, the surface of the heating device is higher than the reference surface and lower than the limiting surface of the limiting part.

[0023] The heating element protrudes from the reference surface, achieving effective contact between the heating element and the heat conductive block, thereby achieving efficient heat conduction.

[0024] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0025] By making the heat dissipation assembly and the nozzle assembly into separate detachable structures, compared to the case where the heat dissipation assembly and the nozzle assembly are a whole, when blockage occurs, only the nozzle assembly needs to be replaced, and there is no need to replace the heat dissipation assembly, which is more convenient and reduces maintenance costs.

[0026] The nozzle assembly surrounds the throat through the heat-conducting block, which is a highly thermally conductive metal. After the heating device generates heat, it conducts the heat to the heat-conducting block to heat the throat. Since the throat is surrounded by the heat-conducting block and fixed to the fixing assembly, the force it receives is absorbed by the fixing assembly, thereby improving the stress on the throat and extending its service life.

[0027] The nozzle assembly and the fixing assembly are fixed by fixing buckles, which can be quickly disassembled and replaced conveniently.

[0028] The elastic device is placed in the mounting groove of the fixing buckle holder and provides elastic force to be applied to the heating device, so that the heating device can be effectively contacted with the heat conductive block and efficient heat conduction can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model will be further described below with reference to the accompanying drawings.

[0030] Figure 1 The figure is a schematic diagram of the structure of a quick-disassembly nozzle mechanism.

[0031] Figure 2 for Figure 1 Schematic diagram of the structure when the middle fixing buckle and heat dissipation component are opened.

[0032] Figure 3 for Figure 2 Schematic diagram of the structure from another angle.

[0033] Figure 4 A schematic diagram of the structure of the nozzle assembly.

[0034] Figure 5 An exploded view of a quick-disassembly nozzle mechanism.

[0035] Figure 6 It is a schematic diagram of the structure when the fixing buckle in the fixing component is opened.

[0036] Figure 7 Exploded view of a fixed component. DETAILED DESCRIPTION

[0037] like Figures 1 to 7 A quick-disassembly nozzle mechanism shown includes a fixing assembly 1, a nozzle assembly 2, a heat dissipation assembly 3 and a heating device 15. The nozzle assembly 2 includes a nozzle 4, a heat conductive block 5 and a throat 6. The heat conductive block 5 surrounds a portion of the throat 6. The heating device 15 contacts the heat conductive block 5 to heat the nozzle 4 through the heat conductive block 5. The heating device 15 is located between the fixing assembly 1 and the heat conductive block 5. The nozzle assembly 2 is detachably mounted on the fixing assembly 1 and fixed by a fixing buckle 7. The heat dissipation assembly 3 is located above the heat conductive block 5. The heat dissipation assembly 3 surrounds a portion of the throat 6 and dissipates heat from the throat 6.

[0038] The heat conducting block 5 is a metal with high thermal conductivity. After the heating device 15 generates heat, the heat is transferred to the heat conducting block 5 to heat the throat 6. The heating device 15 is in the shape of a flat plate. In order to increase the contact area, the surface of the heat conducting block 5 in contact with the heating device 15 is also in the shape of a flat plate. Since the throat 6 is surrounded by the heat conducting block 5 and fixed to the fixing component 1, the force it receives is absorbed by the fixing component 1, thereby improving the force on the throat 6 and extending its service life. In addition, the nozzle assembly 2 is fixed to the fixing component 1 by a fixing buckle 7, which is quickly disassembled and easy to replace.

[0039] like Figure 2 and Figure 3 As shown, the heat dissipation assembly 3 includes a front heat sink 8 and a rear heat sink 9, which are hingedly connected, and are both provided with a throat installation groove 13 and a magnet 14. The magnets 14 provided on the front heat sink 8 and the rear heat sink 9 attract each other to clamp the throat 6. The front heat sink 8 and the rear heat sink 9 can be opened and closed by being hinged, and closed adsorption is achieved by the magnet 14. In the closed state, the front heat sink 8 and the rear heat sink 9 clamp the throat 6.

[0040] like Figure 5 , Figure 6 and Figure 7 The fixing assembly 1 shown includes a fixing base 11, a fixing buckle holder 12 is fixed to the fixing base 11, the heating structure includes a heating device 15 and an elastic device 16, the fixing buckle holder 12 is provided with a mounting groove 17, the elastic device 16 is located in the mounting groove 17, and the elastic device 16 generates an elastic force on the heating device 15 so that the heating device 15 presses against the heat conductive block 5.

[0041] The elastic device 16 is placed in the mounting groove 17 of the fixing buckle holder 12 and provides elastic force to be applied to the heating device 15, so that the heating device 15 can be effectively contacted with the heat conducting block 5, thereby achieving efficient heat conduction.

[0042] like Figure 4 and Figure 5 As shown, the heat conducting block 5 is provided with a limiting step 10, and the fixing buckle holder 12 is provided with a limiting groove 18, and the limiting step 10 matches the limiting groove 18. When the nozzle assembly 2 is installed, the limiting step 10 is aligned with the limiting groove 18 to achieve a limiting effect.

[0043] The fixing buckle holder 12 is provided with a fixing shaft 19, the fixing buckle 7 is hinged to the fixing shaft 19 on one side, and the fixing buckle 7 is buckled with the fixing shaft 19 on the other side through elastic deformation. The fixing buckle 7 and the fixing buckle holder 12 cooperate to fix the nozzle assembly 2.

[0044] The fixed buckle seat 12 is also provided with a limiting portion 20 and a heating device installation groove 21. The limiting portions 20 are respectively provided at the four corners above the heating device installation groove 21. There is a certain gap between the limiting surface 201 of the limiting portion 20 and the groove bottom of the heating device installation groove 21. The gap is greater than the thickness of the heating device 15. The heating device 15 is installed between the heating device installation groove 21 and the limiting portion 20. The fixed buckle seat 12 is also provided with a reference surface 22. The reference surface 22 is located at the top of the heating device installation groove 21. When the heating device 15 is located in the heating device installation groove 21, the surface of the heating device 15 is higher than the reference surface 22 and lower than the limiting surface 201 of the limiting portion 20.

[0045] When installing the nozzle assembly 2, open the front heat sink 8 and the fixing buckle 7, align the limiting step 10 in the nozzle assembly 2 with the limiting groove 18 of the fixing buckle holder 12, align the throat 6 with the throat installation groove 13, make the heat conductive block 5 close to the heating element 15, rotate to close the front heat sink 8, and the front heat sink 8 and the rear heat sink 9 are closed and adsorbed by the magnet 14, rotate the fixing buckle 7 to fasten the fixing shaft 19, and complete the installation of the nozzle assembly 2. The disassembly process is the opposite of the installation process.

[0046] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A quick-disassembly nozzle mechanism, characterized in that: It includes a heat dissipation component and a nozzle component, the nozzle component includes a nozzle, a heat conductive block and a throat, the heat conductive block surrounds part of the throat, the heat dissipation component is located above the heat conductive block, the heat dissipation component surrounds part of the throat, the heat dissipation component includes a front heat sink and a rear heat sink, the front heat sink and the rear heat sink are hinged and magnetically attracted.

2. A quick-detachable nozzle mechanism according to claim 1, characterized in that: The front heat sink and the rear heat sink are both provided with a throat installation groove and a magnet, and the magnets provided on the front heat sink and the rear heat sink are attracted to each other to clamp the throat.

3. A quick-detachable nozzle mechanism according to claim 1, characterized in that: The quick-detachable nozzle mechanism also includes a fixing assembly and a heating device, wherein the heating device contacts the heat-conducting block to heat the nozzle through the heat-conducting block, and the nozzle assembly is detachably mounted on the fixing assembly and fixed by a fixing buckle.

4. A quick-detachable nozzle mechanism according to claim 3, characterized in that: The fixing assembly includes a fixing base, a fixing buckle base is fixed to the fixing base, and the quick-detachable nozzle mechanism also includes an elastic device, the fixing buckle base is provided with an installation groove, the elastic device is located in the installation groove, and the elastic device abuts against the heating device.

5. A quick-detachable nozzle mechanism according to claim 4, characterized in that: The fixing buckle holder is provided with a fixing shaft, the fixing buckle is hinged to the fixing shaft on one side, and the fixing buckle and the fixing shaft on the other side are fastened by elastic deformation.

6. A quick-detachable nozzle mechanism according to claim 3, characterized in that: The heat conducting block is provided with a limiting step, and the fixing buckle holder is provided with a limiting groove, and the limiting step matches the limiting groove.

7. A quick-detachable nozzle mechanism according to claim 3, characterized in that: The fixed buckle seat is also provided with a limiting portion and a heating device installation slot, the limiting portion is respectively arranged at four corners above the heating device installation slot, and the heating device is installed between the heating device installation slot and the limiting portion.

8. A quick-detachable nozzle mechanism according to claim 7, characterized in that: The fixed buckle seat is also provided with a reference surface, which is located at the top of the heating device installation groove. When the heating device is located in the heating device installation groove, the surface of the heating device is higher than the reference surface and lower than the limiting surface of the limiting part.

Images