Broken material and winding material detection integrated device for material strip in 3D printer

Abstract

The utility model relates to a material cutting and winding detection integrated device for a material strip in a 3D printer. The material cutting and winding detection integrated device comprises a shell, a rocker arm assembly, an extrusion assembly and a composite sensor module, the composite sensor module comprises a mainboard, a Hall sensor and a photoelectric sensor; the rocker arm assembly comprises a rocker arm, an idle wheel and an induction magnet, the rocker arm can swing transversely and is connected with the shell through a spring, the induction magnet is arranged at the tail of the other side end of the rocker arm, and the idle wheel is rotationally arranged on the upper portion of the rocker arm. The extrusion assembly comprises a shaft rod, extrusion teeth and a code disc, the shaft rod is rotatably arranged in the shell, the extrusion teeth are arranged on the lower portion of the shaft rod, and the code disc is arranged on the upper portion of the shaft rod. According to the utility model, the automatic detection of whether the material strip is broken or not is realized through the relative action of the induction magnet and the Hall sensor, and the automatic detection of whether the material strip is wound or not is realized through the relative action of the coded disc and the photoelectric sensor, so that the simultaneous monitoring of the two conditions of material breaking and material winding is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to 3D printer technical field, specifically, it shows a kind of material strip's material breakage and winding detection integrated device in 3D printer. BACKGROUND

[0002] 3D printer, it is a kind of machine of rapid prototyping technology, it is a kind of digital model file is based on, using powder-like metal or plastic and other adhesion materials, by layer-by-layer printing to construct object technology, it is often used in mold manufacturing, industrial design etc.

[0003] In the existing 3D printing process, the supply of material (such as plastic filament) is a key factor. Traditional 3D printers usually rely on user manual monitoring of material usage to prevent problems such as material breakage or winding. Some newer devices have begun to use sensors to monitor the state of the material, such as detecting the presence or absence of material through optical sensors, or using tension sensors to determine whether the material is flowing normally. However, these solutions are often single-function, i.e. can only detect one of material breakage or winding, and their accuracy is limited. SUMMARY

[0004] The utility model aims at providing a kind of material strip's material breakage and winding detection integrated device in 3D printer, simple structure is practical, can detect the occurrence of material breakage or winding simultaneously.

[0005] Technical scheme as follows:

[0006] A kind of material strip's material breakage and winding detection integrated device in 3D printer, including shell, the opposite two side walls of the shell are formed with the through port for material strip to pass through before and after, is provided in the shell:

[0007] Rocking arm assembly, extrusion assembly distributed in the straight line channel formed by two through ports two sides, and composite sensor module located at the same side of rocking arm assembly and extrusion assembly;

[0008] The composite sensor module includes mainboard and Hall sensor, photoelectric sensor electrically connected with mainboard;

[0009] The rocking arm assembly includes rocker, idler and inductive magnet, one side end of the rocker is rotatably connected between the bottom of shell, so that rocker can swing transversely, the other side end side of the rocker is connected by spring between the inner side wall of shell, the inductive magnet is arranged at the other side end end of rocker, for interacting with Hall sensor, the idler is rotatably arranged on the middle position of upper end of rocker;

[0010] The extrusion assembly includes a shaft, extrusion teeth, and a code disk. The shaft is rotatably mounted in a vertical position within the housing. The extrusion teeth are located at the lower part of the shaft and are used to interact with an idler wheel. The code disk is located at the upper part of the shaft and is used to interact with a photoelectric sensor.

[0011] Furthermore, the housing includes an upper cover and a bottom cover assembled from the upper and lower parts. The upper cover and the bottom cover are detachably connected by several screws, and the two access ports are opened on opposite sides of the bottom cover.

[0012] Furthermore, the bottom cover has guides on opposite sides inside, allowing material strips to pass through from front to back. The two guides are spaced apart and communicate with the passage opening.

[0013] Furthermore, both sides of the inner end of the guide body are constructed with semi-circular notches.

[0014] Furthermore, the idler wheel has a V-shaped concave cross-section.

[0015] Furthermore, the surface of the code disk has multiple marking holes arranged in a circumferential array.

[0016] Furthermore, the Hall sensor is disposed on the lower outer side of the motherboard and faces outward toward the sensing magnet, while the photoelectric sensor is disposed on the upper outer side of the motherboard and faces downward toward the code disk.

[0017] Furthermore, the top and bottom ends of the shaft are rotatably mounted within the housing via bearing components.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: it realizes automatic detection of whether the material strip is broken by the relative interaction of the induction magnet and the Hall sensor, and realizes automatic detection of whether the material strip is entangled by the relative interaction of the code disk and the photoelectric sensor. Thus, it realizes simultaneous monitoring of both material breakage and entanglement, which not only improves detection accuracy and reduces false alarms and missed alarms, but also reduces printing interruptions caused by material problems, thereby improving the printing success rate and ultimately reducing costs. This device can be widely used. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an integrated device for detecting material breakage and entanglement in a 3D printer according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of an integrated device for detecting material breakage and entanglement in a 3D printer according to an embodiment of the present invention.

[0021] Figure 3This is a schematic diagram of the bottom cover of the housing in an embodiment of this utility model;

[0022] The relevant markings in the attached diagram are: 1-housing, 2-rocker arm assembly, 3-extrusion assembly, 4-composite sensor module; 11-top cover, 12-bottom cover, 121-through port, 122-guide body, 1221-semi-circular notch, 21-rocker arm, 22-idler wheel, 23-induction magnet, 24-spring, 31-shaft, 32-extrusion tooth, 33-code disk, 34-bearing component, 331-marking hole, 41-main board, 42-Hall sensor, 43-photoelectric sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] This utility model provides an integrated device for detecting material breakage and entanglement in a 3D printer, which solves the technical problems mentioned in the background art.

[0025] Please see Figure 1 , Figure 2 , Figure 3 As shown. Specifically, it mainly includes a housing 1, with passage openings 121 formed on the opposite left and right side walls of the housing 1 for material strips to pass horizontally back and forth. Inside the housing 1, a rocker arm assembly 2, an extrusion assembly 3, and a composite sensor module 4 are arranged. The rocker arm assembly 2 and the extrusion assembly 3 are respectively distributed on both sides of the straight channel formed by the two passage openings 121, arranged on the left and right, while the composite sensor module 4 is located on the same side of the rocker arm assembly 2 and the extrusion assembly 3.

[0026] The composite sensor module 4 includes a motherboard 41 and a Hall sensor 42 and a photoelectric sensor 43 electrically connected to the motherboard 41. The Hall sensor can detect the presence of material, while the photoelectric sensor can sense changes in the tension of the material, thereby determining whether material entanglement has occurred.

[0027] The rocker arm assembly 2 includes a rocker arm 21, an idler wheel 22, and an induction magnet 23. One end of the rocker arm 21 is rotatably connected to the bottom of the housing 1, allowing the rocker arm to swing freely laterally relative to the housing. The other end of the rocker arm 21 is movably connected to the inner wall of the housing 1 by a spring 24. That is, when an external force is applied to the rocker arm 21, the rocker arm 21 will swing clockwise or counterclockwise. The induction magnet 23 is located at the end of the other end of the rocker arm 21 and is used to interact with the Hall sensor 42. The idler wheel 22 is rotatably located at the middle of the upper end of the rocker arm 21.

[0028] The extrusion assembly 3 includes a shaft 31, extrusion teeth 32, and a code disk 33. The shaft 31 is rotatably mounted in the housing 1 in a vertical position. The extrusion teeth 32 are located at the lower part of the shaft 31 and are used to interact with the idler wheel 22. The code disk 33 is located at the upper part of the shaft 31 and is used to interact with the photoelectric sensor 43. Multiple marking holes 331 are arranged in a circumferential array on the surface of the code disk 33. The shaft 31 can drive the extrusion teeth 32 and the code disk 33 to rotate clockwise or counterclockwise synchronously.

[0029] First, the printing material strip enters the housing 1 through the through-hole 121 on one side of the housing 1, passes between the idler wheel 22 and the extrusion tooth 32, and then exits through the through-hole 121 on the other side of the housing 1.

[0030] Material breakage detection principle: When the 3D printer is in normal working condition, the rocker arm 21 will maintain a stable position, and the sensing magnet 23 on it will be within the sensing range of the Hall sensor 42. However, once a material breakage occurs, since there is no material exerting a reaction force on the idler wheel 22, and under the restoring force of the spring 24, the spring 24 will push the rocker arm 21 to move outward, causing the sensing magnet 23 on it to move away from the sensing range of the Hall sensor 42. As a result, the Hall sensor 42 cannot detect the change in the magnetic field below, and the system quickly determines that a material breakage event has occurred.

[0031] Material entanglement detection principle: During normal printing, the extrusion teeth 32 in the extrusion assembly 3 will continuously rotate due to the push of the material, and at the same time drive the code disk 33 to rotate synchronously through the shaft 31. The photoelectric sensor 43 monitors the position of the marking hole 331 on the code disk 33 at all times and receives periodic blocking signals within a set time interval. If the photoelectric sensor 43 receives a continuous normally open or normally closed signal within the specified time, instead of the expected periodic blocking signal, it indicates that the material delivery is abnormal, which may be caused by material entanglement or other blockage problems. At this time, the system will trigger a material entanglement alarm and take corresponding measures.

[0032] As can be seen, the integrated device for detecting material breakage and entanglement provided in this embodiment has a simple and practical structure. It can detect material breakage or entanglement at the same time. By timely detection and handling of material breakage and entanglement problems, the probability of printing failure is greatly reduced, and economic losses caused by material waste and machine failure are reduced. Users can enjoy a smoother printing process without frequent intervention.

[0033] In this embodiment, the housing 1 includes an upper cover 11 and a bottom cover 12 assembled from two parts. The upper cover 11 and the bottom cover 12 are detachably connected by several screws, and two access ports 121 are provided on opposite sides of the bottom cover 12. In this way, the assembly and connection of the upper cover and the bottom cover can cover the internal components to protect the internal structure from the influence of the external environment.

[0034] Furthermore, the bottom cover 12 has guides 122 on opposite sides inside, allowing the material strip to pass through from front to back. The two guides 122 are spaced apart and communicate with the passage opening 121. The guides on both sides ensure that the material strip can pass smoothly through the gap between the idler wheel and the extrusion teeth, and maintain the tension of the material strip during continuous feeding.

[0035] The inner ends of the guide body 122 are both constructed with semi-circular notches 1221. The idler wheel 22 and the extrusion tooth 32 are located on the middle two sides of a pair of guide bodies 122. The semi-circular notches are designed to accommodate the installation requirements of the idler wheel and the extrusion tooth.

[0036] The idler wheel 22 has a V-shaped concave cross section to ensure that the material strip can pass through the idler wheel smoothly and avoid misalignment.

[0037] Hall sensor 42 is located on the lower outer side of motherboard 41 and faces outward toward induction magnet 23. Photoelectric sensor 43 is located on the upper outer side of motherboard 41 and faces downward toward encoder 33. Furthermore, by integrating the signal transmission lines of photoelectric sensor 43 and Hall sensor 42 onto motherboard 41, the overall size of the two sensors is reduced.

[0038] The top and bottom ends of the shaft 31 are rotatably mounted in the housing 1 via bearings 34, ensuring that the shaft can rotate smoothly.

[0039] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A device for detecting material breakage and entanglement in a 3D printer, characterized in that, Includes a housing, wherein the housing has openings formed on opposite side walls for material strips to pass through from front to back, and is provided within the housing: The rocker arm assembly and the extrusion assembly are distributed on both sides of the straight channel formed by the two through ports, and the composite sensor module is located on the same side of the rocker arm assembly and the extrusion assembly. The composite sensor module includes a motherboard and a Hall sensor and a photoelectric sensor electrically connected to the motherboard. The rocker arm assembly includes a rocker arm, an idler wheel, and a sensing magnet. One end of the rocker arm is rotatably connected to the bottom of the housing, allowing the rocker arm to swing laterally. The other end of the rocker arm is connected to the inner wall of the housing by a spring. The sensing magnet is located at the end of the other end of the rocker arm and is used to interact with a Hall sensor. The idler wheel is rotatably located at the middle of the upper end of the rocker arm. The extrusion assembly includes a shaft, extrusion teeth, and a code disk. The shaft is rotatably mounted in a vertical position within the housing. The extrusion teeth are located at the lower part of the shaft and are used to interact with an idler wheel. The code disk is located at the upper part of the shaft and is used to interact with a photoelectric sensor.

2. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 1, characterized in that, The housing includes an upper cover and a bottom cover assembled from the upper and lower parts. The upper cover and the bottom cover are detachably connected by several screws, and the two access ports are opened on opposite sides of the bottom cover.

3. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 2, characterized in that, The bottom cover has guides on opposite sides inside, allowing material strips to pass through from front to back. The two guides are spaced apart and communicate with the passage opening.

4. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 3, characterized in that, Both sides of the inner end of the guide body are constructed with semi-circular notches.

5. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 1, characterized in that, The idler wheel has a V-shaped concave cross-section.

6. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 1, characterized in that, The surface of the code disk has multiple marking holes arranged in a circumferential array.

7. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 1, characterized in that, The Hall sensor is located on the lower outer side of the motherboard and faces outward toward the sensing magnet, while the photoelectric sensor is located on the upper outer side of the motherboard and faces downward toward the code disk.

8. The integrated device for detecting material breakage and entanglement in a 3D printer according to claim 1, characterized in that, The top and bottom ends of the shaft are rotatably mounted inside the housing via bearing components.

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