3D printer hot end convenient to maintain

Abstract

The utility model discloses a 3D printer hot end convenient to maintain. The 3D printer hot end comprises a nozzle and a radiator, the device further comprises a heating assembly. The heating assembly comprises a heating seat, and a thermistor and a heating block which are fixed on the heating seat; the nozzle is detachably mounted on the heating seat through a buckle; the heating seat is detachably mounted on the printing head mounting frame through the fixing seat; the nozzle and the heating assembly are detachably connected through the buckle, heating is guaranteed, meanwhile, the nozzle and the heating assembly can be quickly disassembled and assembled, and the hot end can be conveniently maintained.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing equipment, and in particular to a 3D printer hot end that is easy to maintain. Background Technology

[0002] A 3D printer, also known as a three-dimensional printer or stereo printer, is a rapid prototyping process. Currently, the 3D printing technology used in 3D printers is Fused Deposition Modeling (FDM), which uses powdered materials such as metal or plastic to construct three-dimensional objects layer by layer based on a digital model. Specifically, an FDM 3D printer uses a feeding mechanism to supply molten filament material to the hot end of the printer. The molten filament is heated to a molten state within the hot end. The hot end moves along the printing path of the 3D printer, extruding the molten material onto a printing plate, printing the three-dimensional object layer by layer.

[0003] For example, utility model patent CN2020227848867 discloses a snap-on quick-release nozzle device. This device includes a fixing component and a nozzle assembly. The fixing component includes a support plate for fixing to a moving mechanism and mounting slots at both ends of the support plate, with the openings of the two mounting slots facing each other. The support plate also has a first terminal for connecting an electrical signal. The nozzle assembly includes a mounting bracket, a heating nozzle mounted on the mounting bracket, and a second terminal electrically connected to the heating nozzle and cooperating with the first terminal. Elastic fixing components are provided on both sides of the mounting bracket. The two elastic fixing components are detachably snapped into the two mounting slots. When the elastic fixing components are installed in their respective mounting slots, the nozzle assembly is fixed to the fixing component, and the first terminal contacts the second terminal to achieve electrical connection. In this disclosed technical solution, the nozzle and heating assembly are an integrated structure. When a component in the heating end malfunctions, the entire assembly usually needs to be replaced, resulting in high maintenance costs. Summary of the Invention

[0004] The purpose of this invention is to provide a 3D printer hot end that is easy to maintain. In this invention, the nozzle and heating component are detachably connected by a rotating buckle, which ensures heating while facilitating quick disassembly and assembly of the nozzle and heating component, and making it easy to maintain the hot end.

[0005] To solve this technical problem, the technical solution of this utility model is: a 3D printer hot end that is easy to maintain, including a nozzle and a heat sink; and also including a heating component;

[0006] The heating assembly includes a heating base and a thermistor and a heating block fixed to the heating base;

[0007] The nozzle is detachably mounted to the heating seat via a snap fastener; the heating seat is detachably mounted to the printhead mounting bracket via a fixing seat.

[0008] In a further improvement, the heating seat is threadedly connected to the fixing seat; the fixing seat is threadedly mounted on the printhead mounting bracket.

[0009] In a further improvement, the nozzle and heating assembly are surrounded by a heat insulation unit. This invention reduces heat exchange between the nozzle and heating assembly and the surrounding environment by incorporating the heat insulation unit, thus facilitating temperature stability and detection.

[0010] In a further improvement, the insulation unit includes an insulation sleeve with a receiving groove and an insulation pad that covers the receiving groove, wherein the insulation pad covers the nozzle and the heating seat within the receiving groove of the insulation sleeve.

[0011] The heat-insulating pad is held between the heating base and the fixing base.

[0012] This utility model utilizes the insulation sleeve of the insulation unit to surround the nozzle and heating component, and further coordinates with the structure and connection between the heating seat and the fixed seat to simultaneously fix the insulation pad. This utility model has a compact structure and high integration.

[0013] In a further improvement, the heating block is connected to the heating base via a pressure plate thread; the thermistor is inserted into the heating base and separated from the heating block; the lower end of the pressure plate extends downwards towards the heating base with a bent portion for positioning the thermistor. In this invention, the thermistor is closer to the nozzle than the heating block, facilitating the detection of the nozzle temperature; this invention utilizes the pressure plate and its bent portion to simultaneously position the heating block and the thermistor, simplifying the assembly and disassembly of the heating block and the thermistor.

[0014] In a further improvement, the buckle is rotatably connected to the heating base, and the buckle and the heating base can rotate to clamp or release the nozzle between parallel and perpendicular positions. This invention achieves quick disassembly and assembly between the nozzle and the heating base through the structural cooperation between the buckle and the nozzle, and the buckle itself presses the nozzle firmly against the heating base, ensuring heat transfer.

[0015] In a further improvement, the buckle has a continuous integral body, and the body is provided with a connecting part, a clamping part for contacting the nozzle, and a pivot part that extends into the heating seat to form a rotatable connection in sequence towards the heating seat;

[0016] The heating base has mounting holes and clearance notches at its four corners to accommodate the pivot joint. This invention facilitates both the fixing of the nozzle to the heating base and ease of operation.

[0017] In a further improvement, the nozzle has symmetrically extending mounting protrusions on both sides for forming a clamping assembly with paired snap fasteners; the nozzle has a positioning protrusion on the side facing the heating seat.

[0018] By adopting the above technical solution, the beneficial effects of this utility model are:

[0019] This invention allows the nozzle to be detachably installed on the heating seat of the heating component via a snap-fit ​​mechanism, effectively realizing the detachable separation of the nozzle from the heating component and facilitating quick nozzle separation. In actual use, the integrated hot end also facilitates the assembly and disassembly with the printhead mounting frame. Therefore, this invention has the advantages of high production efficiency, convenient maintenance, and low replacement cost. Attached Figure Description

[0020] Figure 1 This is a perspective view of the hot end of a 3D printer that is easy to maintain, as described in this utility model, wherein the buckle and the heating seat are in a parallel position.

[0021] Figure 2 This is a schematic diagram illustrating the fit between the hot end and printhead mounting bracket of a 3D printer, which is easy to maintain, according to this utility model.

[0022] Figure 3 This is a first exploded view of the hot end of a 3D printer that is easy to maintain, according to this utility model.

[0023] Figure 4 This is a second exploded view of the hot end of a 3D printer that is easy to maintain, according to this utility model.

[0024] Figure 5 This is a third exploded view of the hot end of a 3D printer that is easy to maintain, according to this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the present invention, which uses a snap-fit ​​device to lock the nozzle to the heating base.

[0026] In the picture:

[0027] Nozzle 1; Mounting protrusion 11; Positioning protrusion 12; Radiator 2; Heating component 3; Heating base 31; Mounting hole 311; Clearance notch 312; Thermistor 32; Heating block 33; Buckle 34; Connecting part 341; Clamping part 342; Pivot part 343; Pressing plate 35; Bending part 351; Fixing base 4; Mounting bracket 5; Insulation unit 6; Insulation sleeve 61; Insulation pad 62. Detailed Implementation

[0028] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0029] This embodiment discloses a 3D printer hot end that is easy to maintain, such as... Figures 1 to 6As shown, the 3D printer includes a nozzle 1 and a radiator 2; it also includes a heating assembly 3; the heating assembly 3 includes a heating base 31 and a thermistor 32 and a heating block 33 fixed to the heating base 31; the nozzle 1 is detachably mounted to the heating base 31 via a snap-fit ​​34; the heating base 31 is threadedly connected to a fixing base 4; the fixing base 4 is threadedly mounted to a printhead mounting frame 5, thereby enabling quick assembly and disassembly between the hot end of the 3D printer with an integrated structure and the printhead mounting frame 5. In this embodiment, the nozzle 1 and the heating assembly 3 are surrounded by a heat insulation unit 6. This embodiment reduces heat exchange between the nozzle 1 and the heating assembly 3 and the surrounding environment by setting the heat insulation unit 6, which is beneficial for stabilizing and detecting the temperature.

[0030] In this embodiment, the heat preservation unit 6 includes a heat preservation sleeve 61 with a receiving groove and a heat preservation pad 62 covering the receiving groove. The heat preservation pad 62 covers the nozzle 1 and the heating seat 31 in the receiving groove of the heat preservation sleeve 61. The heat preservation pad 62 is sandwiched between the heating seat 31 and the fixing seat 4.

[0031] In this embodiment, the heat insulation unit 6 surrounds the nozzle 1 and the heating component 3, and the heat insulation pad 62 is simultaneously fixed in conjunction with the structure and connection relationship between the heating seat 31 and the fixing seat 4. This embodiment has a compact structure and high integration.

[0032] In this embodiment, the heating block 33 is threadedly connected to the heating base 31 via a pressure plate 35; the thermistor 32 is inserted into the heating base 31 and separated from the heating block 33; the lower end of the pressure plate 35 extends downwards towards the heating base 31 with a bent portion 351 for positioning the thermistor 32. In this embodiment, compared to the heating block 33, the thermistor 32, as a temperature detection component of the nozzle 1, is embedded in the heating base 31. The thermistor 32 is closer to the nozzle 1, allowing for more accurate temperature detection of the nozzle 1.

[0033] In this embodiment, the heating block 33 and the thermistor 32 are positioned simultaneously using the pressure plate 35 and its bending part 351, which facilitates the assembly and disassembly of the heating block 33 and the thermistor 32.

[0034] In this embodiment, the buckle 34 is rotatably connected to the heating base 31. The buckle 34 and the heating base 31 can rotate to clamp or release the nozzle 1 between parallel and perpendicular positions. This embodiment achieves quick disassembly and quick assembly between the nozzle 1 and the heating base 31 through the structural cooperation between the buckle 34 and the nozzle 1. Furthermore, the buckle 34 presses the nozzle 1 firmly against the heating base 31 through its own structure, ensuring heat transfer.

[0035] In this embodiment, the buckle 34 has a continuous, integral body. The body extends sequentially towards the heating base 31, comprising a connecting portion 341, a clamping portion 342 for contacting the nozzle 1, and a pivot portion 343 that extends into the heating base 31 to form a rotatable connection. The heating base 31 has mounting holes 311 and clearance notches 312 at its four corners for accommodating the pivot portion 343. This embodiment facilitates both fixing the nozzle 1 to the heating base 31 and operation. Figure 6 As shown, the clamping part 342 of the buckle 34 comes into contact with the nozzle 1, and uses the deformation of its own structure to press the nozzle 1 tightly against the heating seat 31.

[0036] In this embodiment, the nozzle 1 has symmetrically extending mounting protrusions 11 on both sides for forming a pressing assembly with the paired buckles 34; the nozzle 1 has a positioning protrusion 12 on the side facing the heating seat 31 that nests with the heating seat 31 to facilitate the assembly of the buckles 34.

[0037] The specific assembly process of the hot end of a 3D printer that is easy to maintain, as disclosed in this embodiment, is as follows:

[0038] First, rotate the two latches 34 relative to each other until they are parallel to the heating base 31, such as... Figure 1 As shown;

[0039] Align nozzle 1 with heating base 31, and rotate the two latches 34 until they are perpendicular to heating base 31. Figure 6 As shown, the clamping part 342 of the buckle 34 tightly attaches the nozzle 1 to the heating base 31;

[0040] Screws are used to fix the pressure plate 35, the thermistor 32 and the heating block 33 to the heating base 31;

[0041] The insulation pad 62 and the fixing base 4 are fixed to the heating base 31 using screws, and the hot end disclosed in this embodiment is fixed to the printhead mounting frame 5 using screws through the fixing base 4. In this embodiment, the nozzle 1 is detachably installed on the heating base 31 of the heating assembly 3 via the clip 34, which effectively realizes the detachable separation of the nozzle 1 and the heating assembly 3, facilitating quick separation of the nozzle 1. In actual use, the hot end, which is assembled as an integral structure, is also easy to disassemble and assemble with the printhead mounting frame 5; therefore, this utility model has the advantages of high production efficiency, convenient maintenance, and low replacement cost.

Claims

1. A maintenance-friendly hot end for a 3D printer, characterized in that: Including nozzles and radiators; It also includes heating components; The heating assembly includes a heating base and a thermistor and a heating block fixed to the heating base; The nozzle is detachably mounted to the heating seat via a snap fastener; the heating seat is detachably mounted to the printhead mounting bracket via a fixing seat.

2. The easily maintainable hot end of a 3D printer as described in claim 1, characterized in that: The nozzle and heating assembly are surrounded by a heat preservation unit.

3. The easily maintainable hot end of a 3D printer as described in claim 2, characterized in that: The heat preservation unit includes a heat preservation sleeve with a receiving groove and a heat preservation pad covering the receiving groove. The heat preservation pad covers the nozzle and the heating seat inside the receiving groove of the heat preservation sleeve. The heat insulation pad is held between the heating base and the fixing base.

4. The easily maintainable hot end of a 3D printer as described in claim 1, characterized in that: The heating block is connected to the heating base via a pressure plate thread; The thermistor is inserted into the heating base and separated from the heating block; The lower end of the pressure plate extends downward toward the heating base with a bent portion for positioning the thermistor.

5. The easily maintainable hot end of a 3D printer as described in claim 1, characterized in that: The buckle is rotatably connected to the heating base, and the buckle and the heating base can rotate to clamp or release the nozzle between parallel and perpendicular positions.

6. The easily maintainable hot end of a 3D printer as described in claim 5, characterized in that: The buckle has a continuous integral body, and the body is provided with a connecting part, a clamping part for contacting the nozzle, and a pivot part that extends into the heating seat to form a rotatable connection in sequence towards the heating seat. The heating base is provided with mounting holes and clearance notches at its four corners to accommodate the pivot joint.

7. The easily maintainable hot end of a 3D printer as described in claim 6, characterized in that: The nozzle has symmetrically extending mounting protrusions on both sides for forming a clamping assembly with paired snap fasteners; the nozzle has a positioning protrusion on the side facing the heating base.

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