A cutter pressure rod mounting structure for a 3D printer printing head

Abstract

The utility model discloses to the inconvenient of dismounting, the inconvenient of maintenance of the cutting tool pressure lever installation structure in the prior art, provides a kind of cutting tool pressure lever installation structure for 3D printer printing head, including printing head bearing retainer and cutting tool pressure lever, printing head bearing retainer is fixedly provided with mounting shaft, and mounting shaft is equipped with limit slot, and the limit slot includes connecting groove and circular slot;Cutting tool pressure lever is equipped with cutting tool and the installation hole that is matched with mounting shaft, and the limit block that can move in limit slot is fixedly arranged in installation hole inner wall;Cutting tool pressure lever and printing head bearing retainer between are equipped with spring for driving cutting tool pressure lever reset and the limit screw that cutting tool pressure lever rotation angle limit avoids limit block from circular slot into connecting groove.The structure does not need to set up separate axle pin, but installs the structure of limit block and limit slot cooperation, reduces the quantity of part, makes the dismounting of cutting tool pressure lever more convenient.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printer technology, specifically relating to a cutter pressure bar mounting structure for a 3D printer print head. Background Technology

[0002] 3D printers, also known as three-dimensional printers, are a type of rapid prototyping equipment. 3D printing technology is widely used in various industries. The filament is printed through a print head, which is equipped with a cutting mechanism to cut the filament. Currently, the cutting blades in these mechanisms are mostly mounted on the print head bearing cage using pins. This method involves many parts, making disassembly and assembly cumbersome and inconvenient for maintenance. Summary of the Invention

[0003] This invention addresses the drawbacks of existing technologies where the cutter pressure bar is installed using a pin, leading to inconvenience in disassembly, assembly, and maintenance. It provides a new installation structure for the cutter pressure bar in a 3D printer printhead. This structure eliminates the need for a separate pin, instead employing a combination of a limiting block and a limiting groove for installation. This reduces the number of parts and makes the disassembly and assembly of the cutter pressure bar much easier.

[0004] The objective of this invention is achieved through the following technical solution: a cutter pressure rod mounting structure for a 3D printer printhead, comprising a printhead bearing retainer and a cutter pressure rod. A mounting shaft is fixedly mounted on the printhead bearing retainer, and a limiting groove is provided on the mounting shaft. The limiting groove includes a connecting groove and an arcuate groove arranged around the center line of the mounting shaft. One end of the connecting groove communicates with the end of the mounting shaft, and the other end communicates with the arcuate groove. The cutter pressure rod is provided with a cutter and a mounting hole that mates with the mounting shaft. A limiting block that can move within the limiting groove is fixedly mounted on the inner wall of the mounting hole. When the limiting block moves within the arcuate groove, the cutter pressure rod rotates around the mounting shaft. A spring for driving the cutter pressure rod to reset and a limiting screw for limiting the rotation angle of the cutter pressure rod and preventing the limiting block from entering the connecting groove from the arcuate groove are provided between the cutter pressure rod and the printhead bearing retainer.

[0005] Preferably, the connecting groove is arranged axially along the mounting shaft.

[0006] Preferably, the cutter pressure bar is provided with a waist-shaped countersunk hole, the limiting screw passes through the waist-shaped countersunk hole and is screwed to the print head bearing cage, and the nut part of the limiting screw cannot pass through the waist-shaped countersunk hole.

[0007] Preferably, the printhead bearing retainer is provided with a positioning hole, the cutter pressure rod is fixedly provided with a positioning post, one end of the spring extends into the positioning hole, and the other end is sleeved on the positioning post.

[0008] Preferably, the printhead bearing retainer is provided with a cutter groove that mates with the cutter. The cutter includes a blade holder and a blade fixed on the blade holder. Connecting shafts located on the same straight line are fixed at both ends of the blade holder. The cutter pressure rod is provided with a groove. The connecting shaft is embedded in the groove and can rotate within the groove. The front end of the blade extends into the cutter groove.

[0009] Preferably, the blade holder is provided with a groove, the tail end of the blade is inserted into the groove, and the blade and the blade holder are fixed together by using glue or screws.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The cutter pressure rod mounting structure provided in this application has a limit block on the cutter pressure rod. The cutter pressure rod is directly fitted into the mounting shaft on the printhead bearing retainer. The installation is achieved by the limit block cooperating with the limit groove on the mounting shaft. This structure eliminates the need for a separate shaft pin, reduces the number of parts, and makes the assembly and disassembly of the cutter pressure rod more convenient. Attached Figure Description

[0012] Figure 1 This is the front view of the present utility model;

[0013] Figure 2 This is a partial exploded view of the present invention;

[0014] Figure 3 This is a schematic diagram of the disassembled cutter pressure bar part of this utility model;

[0015] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0016] Figure 5 for Figure 3 Another angle diagram of the location at point B in the middle;

[0017] Figure 6 A 3D view of the cutter pressure bar;

[0018] The markings in the diagram are: 1. Printhead bearing retainer, 2. Cutter pressure bar, 3. Mounting shaft, 4. Limiting groove, 5. Connecting groove, 6. Arc groove, 7. Cutter, 8. Mounting hole, 9. Limiting block, 10. Spring, 11. Limiting screw, 12. Waist-shaped countersunk hole, 13. Positioning hole, 14. Positioning pin, 15. Knife groove, 16. Blade holder, 17. Blade, 18. Connecting shaft, 19. Groove, 20. Embedded groove. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0020] Example 1

[0021] like Figures 1-6 As shown, a cutter pressure rod mounting structure for a 3D printer printhead includes a printhead bearing retainer 1 and a cutter pressure rod 2. A mounting shaft 3 is fixedly mounted on the printhead bearing retainer 1. The mounting shaft 3 has a limiting groove 4, which includes a connecting groove 5 and an arcuate groove 6 arranged around the centerline of the mounting shaft 3. The connecting groove 5 is axially arranged along the mounting shaft 3, with one end connected to the end of the mounting shaft 3 and the other end connected to the arcuate groove 6. The cutter pressure rod 2 has a cutter 7 and a mounting hole 8 that mates with the mounting shaft 3. A limiting block 9, movable within the limiting groove 4, is fixed to the inner wall of the mounting hole 8. When the limiting block 9 moves within the arcuate groove 6, the cutter pressure rod 2 rotates around the mounting shaft 3. A spring 10 for driving the cutter pressure rod 2 to reset and a limiting screw 11 for limiting the rotation angle of the cutter pressure rod 2 to prevent the limiting block 9 from entering the connecting groove 5 from the arcuate groove 6 are provided between the cutter pressure rod 2 and the printhead bearing retainer 1.

[0022] The cutter pressure rod 2 has a countersunk hole 12. A limiting screw 11 passes through the countersunk hole 12 and is screwed to the printhead bearing retainer 1. The nut of the limiting screw 11 cannot pass through the countersunk hole 12, thus preventing the cutter pressure rod 2 from rotating outward at an excessive angle. The printhead bearing retainer 1 has a positioning hole 13. A positioning post 14 is fixed on the cutter pressure rod 2. One end of the spring 10 extends into the positioning hole 13, and the other end is sleeved on the positioning post 14. The spring 10 is positioned and installed by the positioning post 14 and the positioning hole 13.

[0023] The printhead bearing retainer 1 has a blade groove 15 that mates with the cutter 7. The cutter 7 includes a blade holder 16 and a blade 17 fixed on the blade holder 16. Connecting shafts 18, located on the same straight line, are fixed at both ends of the blade holder 16. The cutter pressure rod 2 has a groove 19, and the connecting shaft 18 is embedded in the groove 19 and can rotate within it. The front end of the blade 17 extends into the blade groove 15. The blade holder 16 has a recess 20, and the tail end of the blade 17 is inserted into the recess 20. The blade 17 and the blade holder 16 are fixed together using glue or screws.

[0024] When assembling this utility model, first insert the tail of the blade 17 into the groove 20, and fix the blade 17 to the blade holder 16 with glue or screws. Then, embed the connecting shafts 18 at both ends of the blade holder 16 into the grooves 19. Next, align the limiting block 9 on the cutter pressure rod 2 with the connecting groove 5, and insert the mounting shaft 3 into the mounting hole 8 on the cutter pressure rod 2. During this process, the limiting block 9 enters the arc groove 6 along the connecting groove 5. Rotate the cutter pressure rod 2 to move the limiting block 9 within the arc groove 6. Then, insert the cutter 7 into the blade groove 15, install the spring 10, and use the limiting screw 11 to pass through the waist-shaped countersunk hole 12 on the cutter pressure rod 2 and screw it into the print head bearing retainer 1. The nut of the limiting screw 11 cannot pass through the waist-shaped countersunk hole 12. This is used to limit the rotation angle of the cutter pressure rod 2, preventing the limiting block 9 from entering the connecting groove 5 from the arc groove 6, that is, preventing the cutter pressure rod 2 from detaching from the mounting shaft 3, and also preventing the blade 17 from detaching from the blade groove 15. In this application, the cutter pressure rod 2 is directly sleeved on the connecting shaft 18, and a connection structure with the limiting block 9 and the limiting groove 4 is adopted. There is no need to set up separate parts such as shaft pins, which can reduce the number of parts and make disassembly and assembly simpler and faster, and facilitate maintenance.

[0025] In a 3D printer, the filament used for printing passes through the printhead bearing retainer 1. The blade 17 cuts the filament by penetrating the cutter groove 15. During use, by moving the printhead bearing retainer 1, the fixed top block (not shown in the figure) in the 3D printer strikes the cutter pressure rod 2. The cutter pressure rod 2 rotates around the mounting shaft 3, which drives the cutter 7 to penetrate into the cutter groove 15 to cut the filament. When the cutter pressure rod 2 separates from the fixed top block in the 3D printer, the cutter pressure rod 2 rotates and returns to its initial straight position under the action of the spring 10. At this time, the nut of the limit screw 11 abuts against the cutter pressure rod 2 to limit the rotation angle.

[0026] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A cutter pressure bar mounting structure for a 3D printer print head, characterized in that, The device includes a printhead bearing retainer and a cutter pressure rod. A mounting shaft is fixedly mounted on the printhead bearing retainer, and a limiting groove is provided on the mounting shaft. This limiting groove includes a connecting groove and an arcuate groove arranged around the center line of the mounting shaft. One end of the connecting groove communicates with the end of the mounting shaft, and the other end communicates with the arcuate groove. The cutter pressure rod has a cutter and a mounting hole that mates with the mounting shaft. A limiting block that can move within the limiting groove is fixed to the inner wall of the mounting hole. When the limiting block moves within the arcuate groove, the cutter pressure rod rotates around the mounting shaft. A spring for driving the cutter pressure rod to reset and a limiting screw for limiting the rotation angle of the cutter pressure rod to prevent the limiting block from entering the connecting groove from the arcuate groove are provided between the cutter pressure rod and the printhead bearing retainer.

2. The cutter pressure bar mounting structure for a 3D printer print head according to claim 1, characterized in that... The connecting groove is arranged axially along the mounting shaft.

3. The cutter pressure bar mounting structure for a 3D printer print head according to claim 1, characterized in that... The cutter pressure rod is provided with a waist-shaped countersunk hole, and the limiting screw passes through the waist-shaped countersunk hole and is screwed to the print head bearing cage.

4. The cutter pressure bar mounting structure for a 3D printer print head according to claim 1, characterized in that... The printhead bearing retainer is provided with a positioning hole, and a positioning post is fixed on the cutter pressure rod. One end of the spring extends into the positioning hole, and the other end is sleeved on the positioning post.

5. The cutter pressure bar mounting structure for a 3D printer print head according to claim 1, characterized in that... The printhead bearing retainer is provided with a cutter groove that mates with the cutter. The cutter includes a blade holder and a blade fixed on the blade holder. The blade holder has connecting shafts fixed at both ends on the same straight line. The cutter pressure rod is provided with a groove. The connecting shaft is embedded in the groove and can rotate within the groove. The front end of the blade extends into the cutter groove.

6. A cutter pressure bar mounting structure for a 3D printer print head according to claim 5, characterized in that... The blade holder is provided with a groove, and the tail end of the blade is inserted into the groove. The blade and the blade holder are fixed together by using glue or screws.

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