3D printing feeding mechanism with material breaking prevention function

Abstract

The invention discloses a 3D printing feeding mechanism with a material breaking prevention function, and belongs to the technical field of 3D printing, the 3D printing feeding mechanism comprises a case, a coil penetrating assembly arranged in the case and used for fixing a consumable reel, a driving assembly arranged on the case and used for driving the consumable reel to rotate, and a pay-off detection assembly and a pay-off pipe arranged in the case; a wire of the consumable reel penetrates through the pay-off detection assembly and then is output outwards from the pay-off pipe. The pay-off detection assembly comprises an installation block connected with the machine box, a strip-shaped limiting groove is formed in the installation block in the vertical direction, a first proximity sensor and a second proximity sensor are arranged in the strip-shaped limiting groove in a spaced mode, and a wire rod penetrates through the strip-shaped limiting groove. The wire rod is located between the first proximity sensor and the second proximity sensor, and gaps are formed between the wire rod and the first proximity sensor and between the wire rod and the second proximity sensor. According to the device, the tension borne by the wire can be adjusted by adjusting the pay-off speed, it is ensured that the wire cannot be snapped in the pay-off process, and 3D printing can be normally conducted.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more specifically to a 3D printing feeding mechanism with anti-material breakage function. Background Technology

[0002] Currently, the feeding mechanism of a printer typically consists of a filament reel, a mounting bracket, and a guide tube or guide wheels. The reel is rotatably mounted on the bracket. During the 3D printing process, the printer needs to continuously consume filament. The feeding drive mechanism on the 3D printer continuously applies traction force to the filament through feeding gears, pulling the filament into the print head. While bearing this traction force, the filament also transmits tension to the filament reel, causing the reel to rotate and release the filament, ensuring continuous feeding.

[0003] However, during the unwinding process, the weight of the spool itself and the rotational resistance increase the stress on the filament. For example, when the filament spool is fully wound, its weight is relatively large, and the starting torque required for rotation is large. At the same time, there is also resistance from bearing friction and interlayer friction of the filament. Therefore, the filament needs to withstand a large tensile force to drive the spool to rotate. In addition, when the spool jams, the rotational resistance of the spool will increase sharply, further increasing the tensile force on the filament. Since 3D printing filament itself has a certain tensile strength limit, when the tensile force on the filament exceeds its tensile strength, it is very easy to break, causing a material breakage failure. Summary of the Invention

[0004] The purpose of this invention is to provide a 3D printing feeding mechanism with anti-broken material function to solve the problem that existing 3D printing feeding mechanisms are prone to material breakage when the material is subjected to excessive tension.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A 3D printing feeding mechanism with anti-broken material function includes: a chassis, a winding assembly for fixing the filament reel inside the chassis, a drive assembly for rotating the filament reel on the chassis, and a wire feeding detection assembly and a wire feeding tube inside the chassis; the filament reel wire passes through the wire feeding detection assembly and is output from the wire feeding tube.

[0007] The wire laying detection assembly includes a mounting block connected to the chassis. The mounting block has a strip-shaped limiting groove in the vertical direction. A first proximity sensor and a second proximity sensor are spaced apart inside the strip-shaped limiting groove. The wire passes through the strip-shaped limiting groove and is located between the first proximity sensor and the second proximity sensor, with a gap between the wire and the first proximity sensor and the second proximity sensor.

[0008] Furthermore, the first proximity sensor is fixedly installed on the top of the strip-shaped limiting groove, and the second proximity sensor is slidably disposed within the strip-shaped limiting groove; the second proximity sensor is connected to the mounting block through an adjustment component.

[0009] Furthermore, the aforementioned adjustment assembly includes an adjustment screw, an adjustment block, an adjustment frame, and a slider; the adjustment screw is vertically arranged and rotates with the mounting block, the adjustment block is threadedly engaged with the adjustment screw, the adjustment frame is connected to both the adjustment block and the slider, the slider slides with the side wall of the strip-shaped limiting groove, and the second proximity sensor is connected to the slider.

[0010] Furthermore, along the extension direction of the wire, a wire feeding box is provided between the wire feeding detection component and the winding component, and a material breakage detection component is provided between the wire feeding detection component and the wire feeding tube. The wire feeding detection component is located below the wire feeding box and the material breakage detection component.

[0011] Furthermore, the aforementioned junction box is trumpet-shaped, with the top opening being larger than the bottom opening.

[0012] Furthermore, the aforementioned material breakage detection component includes a vertically mounted mounting sleeve and a through-beam photoelectric sensor mounted on the mounting sleeve; the wire passes through the mounting sleeve and is detected by the through-beam photoelectric sensor to determine if it is broken.

[0013] Furthermore, the aforementioned chassis has an installation port on the side corresponding to the consumable reel; the drive assembly includes two U-shaped frames located near the installation port and opposite each other on the inner side wall of the chassis, two slides located near the installation port and opposite each other on the outer side wall of the chassis, a driven roller shaft and a driving roller shaft respectively located at the top and bottom of the two U-shaped frames, a tensioning slider that slides with the slides and a tensioning roller shaft located on the tensioning slider, and a belt surrounding the driven roller shaft, the driving roller shaft and the tensioning roller shaft;

[0014] The driven roller, the driving roller, and the tensioning roller are arranged in parallel. The U-shaped groove of the U-shaped frame faces the consumable reel. The wire on the consumable reel is pressed and engaged with the belt. The driving roller is connected to a driver.

[0015] Furthermore, the aforementioned tensioning slider is connected to a tensioning assembly; the tensioning assembly includes a slide rod disposed on the outside of the chassis, a counterweight mounting block that slides with the slide rod in a vertical direction, a pull rope connecting the mounting block and the tensioning slider, and a counterweight block disposed on the counterweight mounting block.

[0016] Furthermore, the bottom of the two U-shaped frames is also provided with guide rollers that are parallel to the drive rollers, and the wire passes between the drive rollers and the guide rollers.

[0017] Furthermore, the aforementioned threading assembly includes a slide rail, a sliding plate that slides with the slide rail, and a mounting shaft disposed on the sliding plate; the consumable reel is mounted on the mounting shaft, and the chassis is provided with an adjusting member for adjusting the position of the sliding plate.

[0018] The present invention has the following beneficial effects:

[0019] (1) The wire feeding detection component of the present invention can detect the suspended wire through the first proximity sensor and the second proximity sensor, obtain the speed between the wire feeding speed and the wire speed by the distance between the wire and the first proximity sensor and the second proximity sensor, and adjust the tension on the wire by adjusting the wire feeding speed to ensure that the wire will not be broken during the wire feeding process, so that 3D printing can proceed normally.

[0020] (2) The belt of the present invention is attached to the wire of the consumable reel in a semi-wrapped state. The wire is unloaded by the belt. Not only can the wire be unloaded effectively by friction, but the belt can also flexibly limit the wire to avoid the consumable from becoming loose or misaligned, thus ensuring the stability of the consumable transport.

[0021] (3) The present invention adjusts the force between the belt and the wire by means of a tensioning component. When the diameter of the outermost winding wire becomes smaller, there is sufficient friction to ensure the smooth release of the wire and sufficient extrusion to ensure the stability of the consumables delivery. Attached Figure Description

[0022] Figure 1 A schematic diagram of the external front structure of a 3D printing feeding mechanism with anti-material breakage function provided in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the external back structure of a 3D printing feeding mechanism with anti-material breakage function provided in an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the internal structure of a 3D printing feeding mechanism with anti-material breakage function provided in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the threading assembly provided in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the driving component provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the wire laying detection component provided in an embodiment of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the material breakage detection component provided in an embodiment of the present invention.

[0029] In the diagram: 10-Chassis; 11-Consumable reel; 12-Wire; 13-Mounting port; 20-Threading assembly; 21-Slide rail; 22-Sliding plate; 23-Mounting shaft; 30-Drive assembly; 31-U-shaped frame; 32-Slide carriage; 33-Driven roller shaft; 34-Driven roller shaft; 35-Tensioning slider; 36-Tensioning roller shaft; 37-Belt; 38-Guide roller shaft; 40-Wire feeding detection assembly; 41-Mounting block; 42- 43-Strip limiting groove; 44-First proximity sensor; 45-Second proximity sensor; 50-Adjusting assembly; 60-Wire feeding tube; 70-Wire threading box; 71-Material breakage detection assembly; 72-Through-beam photoelectric sensor; 80-Tensioning assembly; 81-Slide rod; 82-Mounting block; 83-Pull rope; 84-Counterweight block; 451-Adjusting screw; 452-Adjusting block; 453-Adjusting frame; 454-Slider. Detailed Implementation

[0030] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0031] like Figures 1 to 3 As shown, this embodiment provides a 3D printing feeding mechanism with anti-broken material function, including: a chassis 10 and a filament reel 11 and a feed tube 50 disposed inside the chassis 10. The filament reel 11 is wound with filament 12 for 3D printing, and the feed tube 50 is connected to the outside of the chassis 10 for leading the filament 12 outward. The chassis 10 is provided with an opening door, which can be made of a transparent material, such as glass or transparent acrylic sheet, for easy observation.

[0032] like Figures 3 to 5 As shown, the consumable reel 11 is mounted inside the housing 10 via a winding assembly 20. The winding assembly 20 includes two vertically corresponding slide rails 21, a sliding plate 22 positioned between and slidingly engaging with the two slide rails 21, and a mounting shaft 23, one end of which is fixedly mounted on the sliding plate 22, with the other end suspended. The consumable reel 11 is rotatably positioned in the middle of the mounting shaft 23. Limiting discs are located at both ends of the mounting shaft 23, which is a stepped shaft. The two limiting discs are axially limited by steps, ensuring that the two limiting discs can both position the consumable reel 11 and allow it to rotate normally. A tightening nut is threaded to the suspended end of the mounting shaft 23, and the limiting disc away from the sliding plate 22 is fixed by the tightening nut and the steps on the mounting shaft 23.

[0033] The housing 10 has a mounting opening 13 on the side facing the consumable reel 11. Near the mounting opening 13, the housing 10 has a drive assembly 30 for rotating the consumable reel 11. The drive assembly 30 includes two U-shaped frames 31, two slides 32, a driven roller shaft 33, a driving roller shaft 34, a tension slider 35, and a tension roller shaft 36. The two U-shaped frames 31 are horizontally spaced inside the housing 10 and located on both sides of the mounting opening 13, with the U-shaped grooves of the U-shaped frames 31 facing the direction of the consumable reel 11. The two slides 32 are horizontally spaced outside the housing 10 and located on both sides of the mounting opening 13. The driven roller shaft 33 and the driving roller shaft 34 are rotatably mounted on the top and bottom of the two U-shaped frames 31, respectively. The driving roller shaft 34 is connected to a driver, such as a motor with a reducer. The tensioning slider 35 is located between two slides 32 and slides with each of the two slides 32 respectively. A tensioning roller shaft 36 is rotatably connected to the tensioning slider 35.

[0034] The driven roller 33, the driving roller 34, and the tensioning roller 36 are arranged in parallel and in a triangular configuration. A belt 37 is provided on the outer side of each roller. When the belt 37 contacts the consumable reel 11, it concaves inward, partially wrapping the wire 12 on the reel. Because the belt 37 deforms, the tensioning slider 35 slides between the two carriages 32. To prevent the belt 37 from loosening, a tensioning assembly 80 is connected to the tensioning slider 35. Under the action of the tensioning assembly 80, the belt 37 provides pressure on the wire 12 on the reel 11. Driven by the driver, friction is generated between the belt 37 and the wire 12, causing the reel 11 to rotate and thus achieving the wire feeding function.

[0035] In this embodiment, due to the sliding fit between the slide rail 21 and the sliding plate 22, the position of the sliding plate 22 can be adjusted, thereby adjusting the position of the consumable reel 11 to ensure the contact area between the belt 37 and the wire 12 (ensuring the bending degree of the belt 37) and to prevent the belt 37 from slipping. In order to facilitate the adjustment of the position of the sliding plate 22, the housing 10 is provided with an adjusting component for adjusting the position of the sliding plate 22. The adjusting component can be a driving device that can provide linear stroke, such as a piston cylinder. Obviously, the adjusting component can also directly fix the sliding plate 22, such as with bolts. In this case, there are multiple bolt holes on the housing 10. The sliding plate 22 can be adjusted by setting the bolts in different positions. In this case, the adjustment method is manual.

[0036] In this embodiment, in order to guide the wire 12, the bottom of the two U-shaped frames 31 is also provided with a guide roller shaft 38. The guide roller shaft 38 is close to the drive roller shaft 34. The guide roller shaft 38 and the drive roller shaft 34 are located on the same horizontal plane and have a gap between them. This gap is used for the wire 12 to pass through and guide the wire 12.

[0037] like Figure 2 As shown, the tensioning assembly 80 includes a slide bar 81 disposed on the outside of the housing 10, a counterweight mounting block 82 that slides vertically with the slide bar 81, a pull rope 83 connecting the mounting block 82 and the tensioning slider 35, and a counterweight block 84 disposed on the counterweight mounting block 82. A pulley is rotatably connected between the two slides 32, and the pull rope 83 passes around the pulley, changing the position of the pull rope 83 and reducing wear on the pull rope 83 through the pulley.

[0038] like Figure 3 As shown, along the direction of outward conveying of wire 12, the housing 10 is sequentially equipped with a wire threading box 60, a wire feeding detection component 40, and a wire breakage detection component 70. The wire feeding detection component 40 is located between and below the wire threading box 60 and the wire breakage detection component 70. The wire threading box 60 guides the wire 12 downward in the vertical direction, and the wire breakage detection component 70 guides the wire 12 upward in the vertical direction.

[0039] The cable tray 60 is flared, with its top opening larger than its bottom opening and also larger than the length of the consumable reel 11. The bottom opening of the cable tray 60 is adapted to the diameter of the cable 12, ensuring proper cable feeding and straightening. To accommodate different cable specifications, the cable tray 60 is available in various sizes and is detachably connected to the chassis 10. The appropriate cable tray 60 is selected and installed within the chassis 10 according to the specific cable specification.

[0040] like Figure 6 As shown, the wire feeding detection assembly 40 includes a mounting block 41 connected to the chassis 10. The mounting block 41 has a vertically oriented strip-shaped limiting groove 42 extending to the bottom of the mounting block 41. A first proximity sensor 43 and a second proximity sensor 44 are spaced apart from top to bottom within the strip-shaped limiting groove 42. The wire 12 passes through the cable box 60 and then through the strip-shaped limiting groove 42. The wire 12 is positioned between the first proximity sensor 43 and the second proximity sensor 44 and is respectively connected to the first proximity sensor 43 and the second proximity sensor 44. There is a gap between the devices 44. The wire 12 is in a relaxed state in the strip-shaped limiting groove 42. The distance between the wire 12 and the first proximity sensor 43 and the second proximity sensor 44 is obtained, thereby obtaining the difference between the wire feeding speed and the material feeding speed. For example, when the wire 12 moves closer to the first proximity sensor 43, the material feeding speed is greater than the wire feeding speed. At this time, the driver increases the wire feeding speed. When the wire 12 moves closer to the second proximity sensor 44, the material feeding speed is less than the wire feeding speed. At this time, the driver decreases the wire feeding speed.

[0041] To adjust the movement space of the wire 12 in the strip-shaped limiting groove 42, in this embodiment, the wire feeding detection assembly 40 further includes an adjustment assembly 45. The adjustment assembly 45 includes an adjustment screw 451, an adjustment block 452, an adjustment bracket 453, and a slider 454. The adjustment screw 451 is vertically arranged and rotates with the mounting block 41. The adjustment block 452 is threadedly engaged with the adjustment screw 451. The adjustment bracket 453 is connected to both the adjustment block 452 and the slider 454. The slider 454 slides against the side wall of the strip-shaped limiting groove 42. The second proximity sensor 44 is connected to the slider 454. The first proximity sensor 43 is fixedly installed on the top of the strip-shaped limiting groove 42 and extends into the top of the strip-shaped limiting groove 42.

[0042] The wire feeding detection component 40 in this embodiment can detect the suspended wire 12 through the first proximity sensor 43 and the second proximity sensor 44. The distance between the wire 12 and the first proximity sensor 43 and the second proximity sensor 44 is used to obtain the speed between the wire feeding speed and the wire drawing speed. The tension on the wire 12 can be adjusted by adjusting the wire feeding speed to ensure that the wire 12 will not be broken during the wire feeding process, so that 3D printing can proceed normally.

[0043] like Figure 7 As shown, the wire breakage detection assembly 70 includes a vertically mounted mounting sleeve 71 and a through-beam photoelectric sensor 72 mounted on the mounting sleeve 71. The wire 12 passes through the mounting sleeve 71 and is detected by the through-beam photoelectric sensor 72 to determine if it is broken.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A 3D printing feeding mechanism with anti-material breakage function, characterized in that, include: The consumable reel (11) is housed in a chassis (10), a winding assembly (20) for fixing the consumable reel (11) is disposed inside the chassis (10), a drive assembly (30) for rotating the consumable reel (11) is disposed on the chassis (10), and a wire feeding detection assembly (40) and a wire feeding tube (50) are disposed inside the chassis (10); the wire (12) of the consumable reel (11) passes through the wire feeding detection assembly (40) and is output from the wire feeding tube (50); The wire feeding detection assembly (40) includes a mounting block (41) connected to the chassis (10). The mounting block (41) has a strip-shaped limiting groove (42) in the vertical direction. A first proximity sensor (43) and a second proximity sensor (44) are provided at intervals in the inner part of the strip-shaped limiting groove (42). The wire (12) passes through the strip-shaped limiting groove (42). The wire (12) is located between the first proximity sensor (43) and the second proximity sensor (44) and has a gap between the first proximity sensor (43) and the second proximity sensor (44).

2. The 3D printing feeding mechanism with anti-material breakage function according to claim 1, characterized in that, The first proximity sensor (43) is fixedly installed on the top of the strip-shaped limiting groove (42), and the second proximity sensor (44) is slidably disposed in the strip-shaped limiting groove (42); the second proximity sensor (44) is connected to the mounting block (41) through the adjustment component (45).

3. The 3D printing feeding mechanism with anti-material breakage function according to claim 2, characterized in that, The adjustment assembly (45) includes an adjustment screw (451), an adjustment block (452), an adjustment bracket (453), and a slider (454); the adjustment screw (451) is vertically arranged and rotates with the mounting block (41); the adjustment block (452) is threaded with the adjustment screw (451); the adjustment bracket (453) is connected to the adjustment block (452) and the slider (454) respectively; the slider (454) slides with the side wall of the strip-shaped limiting groove (42); and the second proximity sensor (44) is connected to the slider (454).

4. The 3D printing feeding mechanism with anti-material breakage function according to claim 1, characterized in that, Along the extension direction of the wire (12), a wire feeding box (60) is provided between the wire feeding detection component (40) and the winding component (20), and a material breakage detection component (70) is provided between the wire feeding detection component (40) and the wire feeding tube (50). The wire feeding detection component (40) is located below the wire feeding box (60) and the material breakage detection component (70).

5. The 3D printing feeding mechanism with anti-material breakage function according to claim 4, characterized in that, The junction box (60) is flared, and the top opening of the junction box (60) is larger than the bottom opening.

6. The 3D printing feeding mechanism with anti-material breakage function according to claim 4, characterized in that, The material breakage detection component (70) includes a vertically mounted mounting sleeve (71) and a through-beam photoelectric sensor (72) mounted on the mounting sleeve (71); the wire (12) passes through the mounting sleeve (71) and is detected by the through-beam photoelectric sensor (72) whether it is broken.

7. The 3D printing feeding mechanism with anti-material breakage function according to any one of claims 1 to 6, characterized in that, The chassis (10) has an installation port (13) on the side corresponding to the consumable reel (11); the drive assembly (30) includes two U-shaped frames (31) near the installation port (13) and disposed opposite to each other on the inner side wall of the chassis (10), two slides (32) near the installation port (13) and disposed opposite to each other on the outer side wall of the chassis (10), a driven roller shaft (33) and a driven roller shaft (34) respectively disposed on the top and bottom of the two U-shaped frames (31), a tensioning slider (35) that slides with the slides (32), a tensioning roller shaft (36) disposed on the tensioning slider (35), and a belt (37) surrounding the driven roller shaft (33), the driven roller shaft (34) and the tensioning roller shaft (36). The driven roller (33), the driving roller (34) and the tensioning roller (36) are arranged in parallel. The U-shaped groove of the U-shaped frame (31) faces the consumable reel (11). The wire (12) of the consumable reel (11) is squeezed and engaged with the belt (37). The driving roller (34) is connected to a driver.

8. The 3D printing feeding mechanism with anti-material breakage function according to claim 7, characterized in that, The tensioning slider (35) is connected to a tensioning assembly (80); the tensioning assembly (80) includes a slide rod (81) disposed on the outside of the chassis (10), a counterweight mounting block (82) that slides in a vertical direction with the slide rod (81), a pull rope (83) connecting the mounting block (82) and the tensioning slider (35), and a counterweight block (84) disposed on the counterweight mounting block (82).

9. The 3D printing feeding mechanism with anti-material breakage function according to claim 7, characterized in that, The bottom of the two U-shaped frames (31) is also provided with a guide roller (38) arranged parallel to the active roller (34), and the wire (12) passes between the active roller (34) and the guide roller (38).

10. The 3D printing feeding mechanism with anti-material breakage function according to claim 7, characterized in that, The threading assembly (20) includes a slide rail (21), a slide plate (22) that slides with the slide rail (21), and a mounting shaft (23) disposed on the slide plate (22); the consumable reel (11) is mounted on the mounting shaft (23), and the chassis (10) is provided with an adjusting member for adjusting the position of the slide plate (22).

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