A printhead and 3D printer

Abstract

This utility model relates to the field of additive manufacturing technology, specifically to a print head and a 3D printer, including a front housing, a rear housing, a mounting frame, a platform, and a printing hot end. Both the front and rear housings are located above the platform and are detachably connected to it. The mounting frame is located within the cavity formed by the front and rear housings. The bottom of the mounting frame is fixedly connected to the platform, and the outer side of the mounting frame is fixedly connected to the rear housing. The platform has mounting holes, and the bottom of the mounting frame has a latch that inserts into the mounting holes. The bottom of the mounting frame also has a receiving cavity. The top of the printing hot end passes through the platform and extends into the receiving cavity. The printing hot end is detachably connected to the bottom surface of the platform. This utility model, by providing mounting holes on the platform and a latch at the bottom of the mounting frame (the latch being a flexible structure), allows for quick installation and disassembly by pressing the latch into the mounting holes during installation, facilitating maintenance.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, specifically to a printhead and a 3D printer. Background Technology

[0002] FDM stands for "Fused Deposition Modeling," an important 3D printing technology. In FDM printing, the material used is a thermoplastic polymer in filament form. The filament is melted by the print head and selectively deposited layer by layer along a predetermined path to build the object.

[0003] Existing 3D printer print heads generally include an extrusion assembly, a hot printing end, and a heat dissipation assembly. The extrusion assembly is mounted on a fixed frame, and it has many individual parts, making its structure complex and difficult to install. In addition, in order to meet the needs of multi-color 3D printing and enable 3D printers to quickly change consumables, a cutter needs to be added to the print head to enable quick removal and replacement of consumables. This makes the print head structure even more complex and difficult to repair when the print head is damaged. Therefore, a print head that can simultaneously meet the requirements of heat dissipation, is easy to assemble, and has a high degree of integration is needed. Utility Model Content

[0004] This invention provides a printhead and a 3D printer to solve the technical problems of complex structure, difficult maintenance and low integration in the prior art.

[0005] To solve the above problems, the present invention provides a printhead with the following technical solution: A printhead includes a front housing, a rear housing, a mounting bracket, a lifting platform, and a printing hot end. The front housing and the rear housing are both located above the lifting platform and are detachably connected to the lifting platform. The mounting bracket is located in the cavity formed by the front housing and the rear housing. The bottom of the mounting bracket is fixedly connected to the lifting platform, and the outer side of the mounting bracket is fixedly connected to the rear housing. The hanging platform has an installation hole, and the bottom of the fixing frame has a latch. The latch is inserted into the installation hole. The bottom of the fixing frame also has a receiving cavity. The top of the printing hot end passes through the hanging platform and extends into the receiving cavity. The printing hot end is detachably connected to the bottom surface of the hanging platform.

[0006] Furthermore, a cutter assembly is provided on the outer side of the rear housing. The working end of the cutter assembly passes through the rear housing in a horizontal direction and extends into the fixing frame. The cutter assembly slides back and forth in a horizontal direction to cut the consumables.

[0007] Furthermore, the cutter assembly includes a sliding member, an inner mounting plate, a blade fixedly mounted on the mounting plate, guide posts on both sides of the mounting plate, one end of the guide post being an open structure and having a protruding edge.

[0008] Furthermore, the mounting bracket has a guide hole for inserting the mounting plate on the side near the cutter assembly, and the mounting plate is slidably connected to the guide hole.

[0009] Furthermore, positioning holes for inserting guide posts are provided on both sides of the guide hole, and the guide posts are slidably connected to the positioning holes.

[0010] Furthermore, the receiving cavity is provided with a cooling fan on the side away from the printing hot end for dissipating heat from the top of the printing hot end, and the cooling fan is fixedly connected to the fixing frame.

[0011] Furthermore, both the outer walls of the front and rear housings are provided with heat dissipation holes.

[0012] This utility model also provides a 3D printer, including a print head mounted on the 3D printer.

[0013] The beneficial effects of the print head and 3D printer provided by this utility model are: 1. This utility model consists of a front housing, a rear housing, a fixing frame, a hanging platform, and a printing hot end. The fixing frame is installed in the cavity formed by the front housing and the rear housing. The hanging platform has mounting holes, and the fixing frame has a locking buckle at the bottom. The locking buckle is a flexible structure. When installing the fixing frame, the locking buckle can be inserted into the mounting hole by pressing, thereby achieving quick installation and disassembly and facilitating maintenance.

[0014] 2. This utility model provides a receiving cavity at the bottom of the fixed frame, extends the top of the printing hot end into the receiving cavity, and installs a cooling fan on the outside of the receiving cavity. This method has a high degree of integration and is conducive to heat dissipation of the printing hot end.

[0015] This invention enables quick installation of the cutter assembly by setting guide holes and positioning holes on the fixed frame, and setting guide posts and mounting plates on the sliding parts, so that the guide posts are inserted into the positioning holes and the mounting plates are inserted into the guide holes. Furthermore, when replacing the blades on the cutter assembly, it is not necessary to disassemble the front and rear housings, making the operation convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the isometric structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the isometric structure of this utility model. Figure 2 ; Figure 3This is an isometric structural diagram of the cutting blade assembly in this utility model; Figure 4 This is a partial isometric structural diagram of the present invention; Figure 5 This is a partial isometric structural diagram of the present invention. Figure 6 This is a schematic diagram of the structure of the hanging platform and the printing hot end in this utility model; Figure 7 This is a schematic diagram of the structure of the fixing frame and cooling fan in this utility model.

[0017] Explanation of reference numerals in the attached figures: 1. Front housing; 2. Rear housing; 3. Lifting platform; 301. Mounting hole; 302. Threaded hole; 4. Heat dissipation hole; 5. Cutter assembly; 501. Sliding component; 502. Mounting plate; 503. Positioning protrusion; 504. Blade; 505. Guide post; 506. Protruding edge; 6. Fixing bracket; 7. Guide hole; 8. Positioning hole; 9. Cooling fan; 10. Printing hot end; 11. Receiving cavity; 12. Locking latch. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0020] The principles of this utility model will be explained in detail below with reference to several representative embodiments.

[0021] As is known, the print head of an existing 3D printer generally includes an extrusion assembly, a hot printing end, and a heat dissipation assembly. The extrusion assembly is used to extrude the filament and mount it on the mounting bracket. In addition, in order to meet the needs of multi-color 3D printing and enable the 3D printer to quickly change filaments, a cutting assembly needs to be added to the print head. That is, a cutting assembly is set above the feed end of the hot printing end. When changing filaments, the original filament is cut off to enable quick removal and replacement. This adds a cutting assembly to the print head, making the print head structure more complex and difficult to repair when the print head is damaged. Therefore, a print head that can simultaneously meet the requirements of heat dissipation, easy assembly, and high integration is needed.

[0022] An embodiment of a printhead and 3D printer provided by this utility model: Example 1

[0023] like Figures 1 to 7 As shown, it includes a front housing 1, a rear housing 2, a fixing frame 6, a lifting platform 3, and a printing hot end 10. The front housing 1 and the rear housing 2 are both located above the lifting platform 3 and are detachably connected to the lifting platform 3. The fixing frame 6 is located in the cavity formed by the front housing 1 and the rear housing 2. The bottom of the fixing frame 6 is fixedly connected to the lifting platform 3, and the outer side of the fixing frame 6 is fixedly connected to the rear housing 2. The mounting platform 3 has a mounting hole 301, and the bottom of the fixing frame 6 has a locking buckle 12. The locking buckle 12 is inserted into the mounting hole 301. The locking buckle 12 is a flexible structure. When installing the fixing frame 6, the locking buckle 12 can be deformed by pressing and inserted into the mounting hole 301, thereby achieving quick installation and disassembly and facilitating maintenance. The bottom of the fixing frame 6 also has a receiving cavity 11. The top of the printing hot end 10 passes through the mounting platform 3 and extends into the receiving cavity 11. This design can save space for the print head and make effective use of space. The printing hot end 10 is detachably connected to the bottom surface of the mounting platform 3. In specific operation, the mounting platform 3 has a threaded hole 302, and the printing hot end 10 has a through hole corresponding to the position of the threaded hole 302. The bolt passes through the through hole of the printing hot end 10 and connects with the threaded hole 302 on the mounting platform 3 to complete the installation. Example 2

[0024] Based on Embodiment 1, a cutter assembly 5 is provided on the outer side of the rear housing 2. The working end of the cutter assembly 5 passes through the rear housing 2 in a horizontal direction and extends into the fixing frame 6. The cutter assembly 5 slides back and forth in a horizontal direction to cut the consumables. The cutter assembly 5 includes a sliding member 501, an inner mounting plate 502, a blade 504 fixedly mounted on the mounting plate 502, and guide posts 505 on both sides of the mounting plate 502. One end of the guide post 505 is open and has a protruding edge 506. The fixing bracket 6 has a guide hole 7 for inserting the mounting plate 502 on the side near the cutter assembly 5. The mounting plate 502 is slidably connected to the guide hole 7. Positioning holes 8 for inserting the guide post 505 are provided on both sides of the guide hole 7. The length of the positioning hole 8 is less than the length of the guide post 505. The guide post 505 is slidably connected to the positioning hole 8.

[0025] In practical applications, the mounting plate 502 is provided with a positioning protrusion 503 and the blade 504 is provided with a through hole. When installing the blade 504, the positioning protrusion 503 passes through the through hole on the blade 504, which enables the blade 504 to be quickly positioned and installed.

[0026] When installing the guide post 505, one end of the guide post 505 passes through the positioning hole 8, and the protrusion 506 passes through the positioning hole 8 and extends to the outside. During the reciprocating movement of the guide post 505, the protrusion 506 can prevent the cutter assembly 5 from disengaging from the fixing frame 6. In addition, in order to automatically reset the cutter assembly 5 after use, a spring can be sleeved on the outside of the guide post 505, and the spring force can be used to automatically reset the cutter assembly 5.

[0027] In the above embodiment, the side of the receiving cavity 11 away from the printing hot end 10 is also provided with a cooling fan 9 for dissipating heat from the top of the printing hot end 10. The cooling fan 9 is fixedly connected to the fixing frame 6. During operation, the cooling fan 9 cools the printing hot end 10 located in the receiving cavity 11, reduces the temperature of the feeding end of the printing hot end 10, prevents the consumable from melting at the feeding end of the printing hot end 10, and ensures that the consumable can smoothly enter the printing hot end 10. In addition, in order to facilitate the dissipation of heat inside the print head, heat dissipation holes 4 are provided on the outer walls of the front housing 1 and the rear housing 2. There are multiple heat dissipation holes 4.

[0028] During assembly, a channel is provided in the middle of the hanging platform 3. First, the feed end of the printing hot end 10 is passed through the channel on the hanging platform 3, and the outer side of the printing hot end 10 is fixedly connected to the bottom of the hanging platform 3. Then, the two latches 12 at the bottom of the fixing frame 6 are inserted into the mounting holes 301 on the hanging platform 3 to complete the installation. In order to improve the connection strength of the fixing frame 6, a threaded hole 302 corresponding to the position of the threaded hole 302 on the hanging platform 3 can be opened at the bottom of the fixing frame 6, and the bolts fixing the printing hot end 10 are passed through the hanging platform 3 and connected to the fixing frame 6 to complete the secondary fastening. After installing the printing hot end 10 and the fixing frame 6, the rear housing 2 and the front housing 1 can be installed on the outside of the fixing frame 6 in sequence to complete the assembly.

[0029] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0030] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A printhead, characterized by: It includes a front housing, a rear housing, a mounting bracket, a lifting platform, and a printing hot end. The front housing and the rear housing are both located above the lifting platform and are detachably connected to the lifting platform. The mounting bracket is located in the cavity formed by the front housing and the rear housing. The bottom of the mounting bracket is fixedly connected to the lifting platform, and the outer side of the mounting bracket is fixedly connected to the rear housing. The hanging platform has an installation hole, and the bottom of the fixing frame has a latch. The latch is inserted into the installation hole. The bottom of the fixing frame also has a receiving cavity. The top of the printing hot end passes through the hanging platform and extends into the receiving cavity. The printing hot end is detachably connected to the bottom surface of the hanging platform.

2. A printhead as in claim 1, wherein: A cutting assembly is provided on the outer side of the rear housing. The working end of the cutting assembly passes through the rear housing in a horizontal direction and extends into the fixing frame. The cutting assembly slides back and forth in a horizontal direction to cut the consumables.

3. A printhead as in claim 2, wherein: The cutter assembly includes a sliding member, an inner mounting plate, a blade fixedly mounted on the mounting plate, and guide posts on both sides of the mounting plate. One end of the guide post is open and has a raised edge.

4. A printhead as in claim 3 wherein: The mounting bracket has a guide hole for inserting the mounting plate on the side near the cutter assembly, and the mounting plate is slidably connected to the guide hole.

5. A printhead as claimed in claim 4, wherein: The guide hole has positioning holes on both sides for inserting guide posts, and the guide posts are slidably connected to the positioning holes.

6. A printhead as in Claim 1, wherein: The receiving cavity is also provided with a cooling fan on the side away from the printing hot end for dissipating heat from the top of the printing hot end, and the cooling fan is fixedly connected to the fixing frame.

7. A printhead as in Claim 1 wherein: Both the front and rear housings have heat dissipation holes on their outer walls.

8. A 3D printer characterized by: Includes a printhead as described in any one of claims 1-7.

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