Lightweight material breakage monitoring extruder structure and 3D printer

Abstract

The utility model discloses a light-weight material breakage monitoring extruder structure which comprises an extruder body, a driving extrusion mechanism arranged on the extruder body, and a driving mechanism used for controlling the driving extrusion mechanism to rotate, the lower swing arm is rotationally arranged on the extruder body; the driven extrusion mechanism is rotationally arranged on the lower swing arm; the upper swing arm is rotationally arranged on the extruder body and above the lower swing arm, and the upper swing arm enables the lower swing arm to abut against the driving extrusion mechanism by means of the elastic force of a first elastic piece and enables the driven extrusion mechanism and the driving extrusion mechanism to be in a matched state; the detection device is arranged right above the extrusion channel of the extruder body and is used for feeding consumables and detecting whether the consumables are broken or not; the 3D printing extrusion mechanism can solve the problems that a 3D printing extrusion mechanism is bloated in structure and large in occupied space, and material shortage or material breakage of consumables in the extrusion process cannot be detected.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a lightweight material breaking monitoring extruder structure and a 3D printer. Background Art

[0002] The extruder head of a traditional FDM-level 3D printer includes: a print head (including heat sink, throat, heating block, nozzle and other sub-components), an extruder (including extrusion gears, stepper motors and other structural parts). At the same time, the conventional extruder head structure is divided into two types: proximal extrusion and distal extrusion. These two structures are distinguished by the relative assembly position of the extruder and the print head. However, the traditional extruder or print head structure is relatively bloated, and there is no awareness of control over the external dimensions. The weight cannot meet the requirements of high-speed printing. During the normal printing process of the printer, it is impossible to detect the extrusion operation status of the consumables. For example, the abnormality of the consumables during the printing process may lead to material shortage or material breakage, resulting in printing failure, taking a lot of time and wasting a lot of consumables. Utility Model Content

[0003] The utility model aims to solve the above technical problems, namely, the 3D printing extrusion mechanism has a bloated structure, occupies a large space, and cannot detect the phenomenon of material shortage or material breakage during the extrusion process.

[0004] In a first aspect, the utility model provides a lightweight material-breaking monitoring extruder structure, comprising an extruder body and an active extrusion mechanism arranged on the extruder body, a driving mechanism for controlling the rotation of the active extrusion mechanism, and a lower swing arm rotatably arranged on the extruder body and a driven extrusion mechanism rotatably arranged on the lower swing arm;

[0005] An upper swing arm, the upper swing arm is rotatably arranged on the extruder body above the lower swing arm, the upper swing arm uses the elastic force of the first elastic member to abut the lower swing arm toward the active extrusion mechanism, and makes the driven extrusion mechanism and the active extrusion mechanism in a matching state, so that: an extrusion channel for the consumables to pass through is formed between the active extrusion mechanism and the driven extrusion mechanism;

[0006] The detection device is arranged on the extruder body just above the extrusion channel and is used for feeding the consumables and detecting whether the consumables are broken.

[0007] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, the driving mechanism includes a servo motor, a driving bevel gear configured at the rotating shaft end of the servo motor, a driven bevel gear configured at the active extrusion mechanism, and an idler gear meshingly connected between the driving bevel gear and the driven bevel gear.

[0008] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, the active extrusion mechanism includes an active extrusion shaft rotatably mounted on the extruder body and an active extrusion wheel and an active extrusion gear mounted on the active extrusion shaft.

[0009] In the preferred technical solution of the above-mentioned lightweight material break monitoring extruder structure, the driven extrusion mechanism includes a driven extrusion shaft rotatably mounted on the lower swing arm and a driven extrusion wheel and a driven extrusion gear mounted on the driven extrusion shaft, and the driven extrusion gear is meshed with the active extrusion gear.

[0010] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, the active extrusion mechanism is provided with a handle which rotates synchronously with the active extrusion mechanism at one end away from the driven bevel gear.

[0011] In the preferred technical solution of the above-mentioned lightweight material break monitoring extruder structure, the detection device includes a detection frame, the detection frame is formed with a penetrating feed channel in the vertical direction, and is formed with a first detection channel and a second detection channel connected to the feed channel in the horizontal direction;

[0012] A second elastic member and a contact ball are disposed in both the first detection channel and the second detection channel. The second elastic member is electrically connected to the PCB board. With the help of the elastic force of the second elastic member, the two contact balls contact each other to put the circuit in a conducting state.

[0013] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, a plurality of concave structures spaced apart from each other are evenly formed on the circumferential surface of the active extrusion wheel and / or the driven extrusion wheel.

[0014] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, the extruder body is provided with a discharge pipe just below the extrusion channel.

[0015] In the preferred technical solution of the above-mentioned lightweight material breakage monitoring extruder structure, the first elastic member is a spring or elastic steel.

[0016] In a second aspect, the utility model further provides a 3D printer, wherein the 3D printer comprises the above-mentioned lightweight material breakage monitoring extruder structure.

[0017] The beneficial effects of the utility model are:

[0018] (1) The utility model sets the driving helical gear, the driven helical gear and the idler gear as helical gears. Compared with spur gears, helical gears have longer tooth surface length and a good number of teeth, and thus have better transmission performance, can withstand greater loads, and effectively reduce the generation of axial loads, thereby improving the stability and life of the equipment. In addition, the inclination angle design of the helical gears can effectively reduce the impact and vibration generated when the tooth surfaces contact, thereby reducing noise.

[0019] (2) The utility model reduces the outer diameters of the driving helical gear and the driven helical gear while satisfying the reduction ratio, and uses the idler gear as a transfer to compensate for the problem of insufficient center distance between the driving helical gear and the driven helical gear, thereby effectively avoiding the defect that the overall structure of the extruder is too bloated due to the excessive size of the driven helical gear in a large reduction ratio, thereby improving the aesthetics of the extruder.

[0020] (3) When the consumable material is broken, under the action of the two second elastic members, the two contact balls contact each other, the circuit is turned on, the driving mechanism stops working, and the upper swing arm is manually controlled to reverse so that the driven extrusion mechanism and the active extrusion mechanism are in a separable state. At this time, the consumable material is pulled to the outside, taken out through the extrusion channel and the detection device, and replaced. This can effectively improve the yield rate of printed products, reduce the scrap rate, and reduce the waste of consumables. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The main view of this utility model Figure 1 ;

[0022] Figure 2 The main view of the utility model Figure 2 ;

[0023] Figure 3 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0024] Figure 4 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0025] Figure 5 It is a connection diagram of the active extrusion mechanism and the driven extrusion mechanism;

[0026] Figure 6 is a cross-sectional view of the detection device;

[0027] In the figure: extruder body 1, active extrusion mechanism 2, active extrusion wheel 21, active extrusion gear 22, driving mechanism 3, servo motor 31, active bevel gear 32, driven bevel gear 33, idler gear 34, lower swing arm 4, driven extrusion mechanism 5, driven extrusion wheel 51, driven extrusion gear 52, upper swing arm 6, first elastic member 7, extrusion channel 8, detection device 9, detection frame 91, feed channel 92, first detection channel 93, second detection channel 94, second elastic member 95, contact ball 96, handle 10, discharge pipe 11. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0029] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "rear" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figures 1 to 6 As shown, the lightweight material breakage monitoring extruder structure of the utility model includes an extruder body 1 and an active extrusion mechanism 2 arranged on the extruder body 1, a driving mechanism 3 for controlling the rotation of the active extrusion mechanism 2, and a lower swing arm 4 rotatably arranged on the extruder body 1 and a driven extrusion mechanism 5 rotatably arranged on the lower swing arm 4; an upper swing arm 6, the upper swing arm 6 is rotatably arranged on the extruder body 1 above the lower swing arm 4, and the upper swing arm 6 uses the elastic force of the first elastic member 7 to abut the lower swing arm 4 toward the active extrusion mechanism 2, and makes the driven extrusion mechanism 5 and the active extrusion mechanism 2 in a matching state, so that: an extrusion channel 8 for the consumable to pass through is formed between the active extrusion mechanism 2 and the driven extrusion mechanism 5; a detection device 9, the detection device 9 is arranged on the extruder body 1 just above the extrusion channel 8, and is used to feed the consumable and detect whether the consumable is broken.

[0032] See also Figures 2 to 4 The upper swing arm 6 is rotatably mounted on the extruder body 1 through a shaft, and the first elastic member 7 is mounted on the shaft; the lower swing arm 4 is rotatably mounted on the extruder body 1 through a shaft, and the driven extrusion mechanism 5 is rotatably mounted on the lower swing arm 4.

[0033] See also Figures 2 to 4 In the initial state, under the action of the elastic force of the first elastic member 7, the upper swing arm 6 abuts the lower swing arm 4 toward the active extrusion mechanism 2, thereby causing the lower swing arm 4 to rotate, and the driven extrusion mechanism 5 on the lower swing arm 4 contacts and meshes with the active extrusion mechanism 2.

[0034] When extruding the consumables, the consumables are first placed into the extrusion channel 8 formed between the active extrusion mechanism 2 and the driven extrusion mechanism 5 through the detection device 9, and the active extrusion mechanism 2 is controlled to work by the driving mechanism 3, and the active extrusion mechanism 2 drives the driven extrusion mechanism 5 to rotate, so that the consumables located in the extrusion channel 8 can be extruded and discharged to the bottom of the extruder body 1; if the detection device 9 detects that the consumables are broken, the driving mechanism 3 will be controlled to stop working, and the upper swing arm 6 will be manually controlled to reverse to overcome the elastic force of the first elastic member 7, so that the upper swing arm 6 does not contact the lower swing arm 4, and the lower swing arm 4 is not squeezed by the upper swing arm 6, so that the driven extrusion mechanism 5 and the active extrusion mechanism 2 are in a separable state. At this time, the consumables are pulled to the outside, the consumables are taken out through the extrusion channel 8 and the detection device 9, and the consumables are replaced, which can effectively improve the yield rate of printed products, reduce the scrap rate, and reduce the waste of consumables.

[0035] In one or more embodiments, the driving mechanism 3 includes a servo motor 31, a driving bevel gear 32 configured at the rotating shaft end of the servo motor 31, a driven bevel gear 33 configured on the active extrusion mechanism 2, and an idler gear 34 meshingly connected between the driving bevel gear 32 and the driven bevel gear 33.

[0036] See also Figure 1 , Figure 4 The driving helical gear 32, the driven helical gear 33, and the idler gear 34 are all helical gears. Compared with spur gears, helical gears have longer tooth surface length and a good number of teeth, so they have better transmission performance, can withstand greater loads, and effectively reduce the generation of axial loads, thereby improving the stability and life of the equipment. And the inclination angle design of the helical gear can effectively reduce the impact and vibration generated when the tooth surface contacts, thereby reducing noise. In addition, when the reduction ratio is met, the idler gear 34 is used as a transfer method to make up for the problem of insufficient center distance between the driving helical gear 32 and the driven helical gear 33, effectively avoiding the defect that the driven helical gear 33 is too large in size in a large reduction ratio, which makes the overall structure of the extruder too bloated, thereby improving the aesthetics of the extruder.

[0037] In one or more embodiments, the active extrusion mechanism 2 includes an active extrusion shaft rotatably mounted on the extruder body 1 , and an active extrusion wheel 21 and an active extrusion gear 22 mounted on the active extrusion shaft.

[0038] See also Figures 3 to 5 , the active extrusion wheel 21 and the active extrusion gear 22 rotate synchronously with the active extrusion shaft. When the active extrusion wheel 21 needs to be controlled to rotate, the active bevel gear 32 is first controlled to rotate by the servo motor 31, and the active bevel gear 32 drives the driven bevel gear 33 to rotate through the idler gear 34, so that the active extrusion shaft, the active extrusion wheel 21, and the active extrusion gear 22 rotate synchronously with the driven bevel gear 33, which has the characteristics of simple structure and convenient operation.

[0039] In one or more embodiments, the driven extrusion mechanism 5 includes a driven extrusion shaft rotatably mounted on the lower swing arm 4 , and a driven extrusion wheel 51 and a driven extrusion gear 52 mounted on the driven extrusion shaft.

[0040] See also Figures 2 to 5 , the driven extrusion wheel 51 and the driven extrusion gear 52 rotate synchronously with the driven extrusion shaft. The driven extrusion gear 52 is separable from the active extrusion gear 22. When the upper swing arm 6 pushes the lower swing arm 4 to move toward the active extrusion mechanism 2, the active extrusion gear 22 can mesh with the driven extrusion gear 52. When the upper swing arm 6 no longer presses the lower swing arm 4, the driven extrusion gear 52 can not mesh with the active extrusion gear 22 under the action of the lower swing arm 4, and the driven extrusion gear 52 is in a free state, so that the space of the extrusion channel 8 becomes larger, which is convenient for the consumables to exit the extrusion channel 8.

[0041] In one or more embodiments, the active extrusion mechanism 2 is provided with a handle 10 at one end away from the driven bevel gear 33 , which rotates synchronously with the active extrusion mechanism 2 .

[0042] See also Figure 2 When the servo motor 31 drives the active extrusion shaft to rotate through the active bevel gear 32, the idler gear 34, and the driven bevel gear 33, the handle 10 can rotate synchronously with the active extrusion shaft. When the consumable material is cut off, the servo motor 31 can be stopped, and the handle can be rotated in the reverse direction to make the active extrusion wheel 21 rotate in the reverse direction, so as to realize the extrusion channel 8 for the consumable material to exit. The operation is convenient and the structure is simple.

[0043] In one or more embodiments, the detection device 9 includes a detection frame 91, the detection frame 91 is formed with a penetrating feed channel 92 in the vertical direction, and is formed with a first detection channel 93 and a second detection channel 94 connected to the feed channel 92 in the horizontal direction;

[0044] A second elastic member 95 and a contact ball 96 are disposed in the first detection channel 93 and the second detection channel 94. The second elastic member 95 is electrically connected to the PCB board. With the elastic force of the second elastic member 95, the two contact balls 96 contact each other to put the circuit in a conducting state.

[0045] See also Figure 3 , Figure 4 , Figure 6 The first detection channel 93 and the second detection channel 94 are located at the same horizontal line, and the first detection channel 93, the second detection channel 94 and the feeding channel 92 are interconnected. The two second elastic members 95 in the first detection channel 93 and the second detection channel 94 are respectively connected to the pins of the PCB board.

[0046] In the initial state, when no material is fed into the feed channel 92 of the detection frame 91, under the action of the second elastic member 95 in the first detection channel 93 and the second detection channel 94, the two contact balls 96 are partially located in the feed channel 92 and contact each other to form a closed loop.

[0047] When the consumable is extruded, the consumable is placed in the feed channel 92. Under the extrusion of the consumable, the two second elastic members 95 are compressed, and the contact balls 96 in the first detection channel 93 and the second detection channel 94 move away from each other. The active extrusion mechanism 2 is controlled to extrude and transport the consumable. When the consumable is broken, under the action of the two second elastic members 95, the two contact balls 96 contact each other, and the circuit is turned on. At this time, the PCB board feeds back the signal to the main board, thereby making an instruction judgment, suspending printing and informing the user of the abnormal state of lack of material or broken material, so that the user can continue printing after repairing it to avoid waste.

[0048] In one or more embodiments, a plurality of concave structures spaced apart from each other are uniformly formed on the circumferential surface of the active extrusion wheel 21 and / or the driven extrusion wheel 51 .

[0049] The accompanying drawings do not show the concave structure on the surface of the active extrusion wheel 21 and the driven extrusion wheel 51 . The concave structure can increase the friction between the active extrusion wheel 21 and the driven extrusion wheel 51 and the consumables, thereby ensuring the passage of the consumables.

[0050] In one or more embodiments, the extruder body 1 is provided with a discharge pipe 11 directly below the extrusion channel 8. Figure 2 The discharge pipe 11 is used to transport the qualified consumables to avoid the deviation of the consumable position and improve the conveying effect of the consumables.

[0051] In one or more embodiments, the first elastic member 7 is a spring or elastic steel.

[0052] In addition, the utility model also provides a 3D printer, which includes the above-mentioned lightweight material breakage monitoring extruder structure.

[0053] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A lightweight material breaking monitoring extruder structure, characterized in that: It includes an extruder body and an active extrusion mechanism arranged on the extruder body, a driving mechanism for controlling the rotation of the active extrusion mechanism, and a lower swing arm rotatably arranged on the extruder body and a driven extrusion mechanism rotatably arranged on the lower swing arm; An upper swing arm, the upper swing arm is rotatably arranged on the extruder body above the lower swing arm, the upper swing arm uses the elastic force of the first elastic member to abut the lower swing arm toward the active extrusion mechanism, and makes the driven extrusion mechanism and the active extrusion mechanism in a matching state, so that: an extrusion channel for the consumables to pass through is formed between the active extrusion mechanism and the driven extrusion mechanism; The detection device is arranged on the extruder body just above the extrusion channel and is used for feeding the consumables and detecting whether the consumables are broken.

2. The lightweight material breaking monitoring extruder structure according to claim 1 is characterized in that: The driving mechanism includes a servo motor, a driving helical gear configured at the rotating shaft end of the servo motor, a driven helical gear configured at the active extrusion mechanism, and an idler gear meshingly connected between the driving helical gear and the driven helical gear.

3. The lightweight material breaking monitoring extruder structure according to claim 1 is characterized in that: The active extrusion mechanism comprises an active extrusion shaft rotatably mounted on the extruder body, and an active extrusion wheel and an active extrusion gear mounted on the active extrusion shaft.

4. The lightweight material breaking monitoring extruder structure according to claim 3 is characterized in that: The driven extrusion mechanism comprises a driven extrusion shaft rotatably mounted on the lower swing arm, a driven extrusion wheel and a driven extrusion gear mounted on the driven extrusion shaft, and the driven extrusion gear is meshed with the active extrusion gear.

5. The lightweight material breaking monitoring extruder structure according to claim 2 is characterized in that: The active extrusion mechanism is provided with a handle at one end away from the driven bevel gear and is rotated synchronously with the active extrusion mechanism.

6. The lightweight material breaking monitoring extruder structure according to claim 1 is characterized in that: The detection device comprises a detection frame, wherein the detection frame is formed with a penetrating feed channel in the vertical direction, and is formed with a first detection channel and a second detection channel communicating with the feed channel in the horizontal direction; A second elastic member and a contact ball are disposed in both the first detection channel and the second detection channel. The second elastic member is electrically connected to the PCB board. With the help of the elastic force of the second elastic member, the two contact balls contact each other to put the circuit in a conducting state.

7. The lightweight material breaking monitoring extruder structure according to claim 4 is characterized in that: A plurality of concave structures spaced apart from each other are uniformly formed on the circumferential surface of the active extrusion wheel and / or the driven extrusion wheel.

8. The lightweight material breaking monitoring extruder structure according to claim 1, characterized in that: The extruder body is provided with a discharge pipe just below the extrusion channel.

9. The lightweight material breaking monitoring extruder structure according to claim 1, characterized in that: The first elastic member is a spring or elastic steel.

10. A 3D printer, characterized in that: The lightweight material-breaking monitoring extruder structure comprises the structure described in any one of claims 1 to 9, and is used to monitor whether the consumable material is breaking.

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