3D printing extrusion mechanism with continuously adjustable extrusion head and 3D printer

Abstract

The utility model relates to a 3D printing extrusion mechanism with stepless adjustment of extrusion head and 3D printer, and it relates to the technical field of 3D printer, wherein, 3D printing extrusion mechanism with stepless adjustment of extrusion head, it contains fixed frame, deformation assembly, deformation assembly is sleeved in the outside of fixed frame, and deformation assembly is detachably connected with fixed frame, extrusion head, extrusion head is elastic extrusion head, and extrusion head is located in fixed frame, and both ends of extrusion head extend deformation assembly, reset assembly, reset assembly is rotatably connected on fixed frame, and reset assembly is fixed on deformation assembly, stretch assembly, one end of stretch assembly is rotatably connected on fixed frame, and the other end is fixed on reset assembly, adopt above-mentioned technical scheme, can according to actual situation quick stepless adjustment of extrusion head internal flow, can effectively improve 3D printer work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of 3D printers, specifically to a 3D printing extrusion mechanism with an infinitely adjustable extruder head and a 3D printer. Background Technology

[0002] A 3D printer, also known as a three-dimensional printer (3DP), is a type of additive manufacturing technology, or rapid prototyping technology. It uses a digital model file as a basis and employs special waxes, powdered metals, or plastics—materials that can be bonded—to create three-dimensional objects by printing layer by layer of this bonding material. Currently, 3D printers are used to manufacture products. It's a technology that constructs objects by printing layer by layer. The principle of a 3D printer is that data and materials are put into the printer, and the machine will build the product layer by layer according to the program.

[0003] Traditional 3D printers have a fixed extrusion nozzle diameter, making it difficult to switch the nozzle diameter as needed and making it inconvenient to adjust the material flow rate inside the extrusion nozzle, which greatly affects the printing speed of 3D printers. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a 3D printing extrusion mechanism and 3D printer with an infinitely adjustable extrusion head. The internal flow rate of the extrusion head can be quickly and infinitely adjusted according to actual conditions. For example, when printing internal infill structures, the 3D printer can use a high-flow extrusion head to reduce the number of filaments in the 3D printer; when printing small external details, a low-flow extrusion head can be used to improve the accuracy and detail of the printed shape.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a 3D printing extrusion mechanism with an infinitely adjustable extrusion head, comprising: Fixture; A deformation component, which is sleeved on the outside of the fixed frame and is detachably connected to the fixed frame; An extrusion head, wherein the extrusion head is an elastic extrusion head and is located within a fixed frame, and both ends of the extrusion head extend out deformation components; A reset assembly, which is rotatably connected to a fixed frame and fixed to a deformation assembly; A tensioning assembly, one end of which is rotatably connected to a fixed frame, and the other end of which is fixed to a reset assembly; A driving component, which is connected to the tensioning component, is used to drive the tensioning component; When the drive component drives the stretching component to rotate in the forward direction, the stretching component will pull the reset component to rotate in the forward direction. Because the fixed frame positions the connection point of the deformation component, the deformation component will deform to squeeze the extruder head while rotating, and the flow rate in the extruder head will be infinitely reduced. When the reset component resets, it will drive the deformation component to reset, and the extruder head will gradually return to its original shape, and the flow rate in the extruder head will be infinitely increased.

[0006] Preferably, the deformation component includes a bracket and multiple adjusting ropes. The bracket is sleeved on the outside of the fixed frame, and the reset component is fixed on the bracket. The adjusting ropes are closed-loop adjusting ropes that are wound around the fixed frame and the bracket, forming a spatial structure between the adjusting ropes. When the reset component drives the bracket to rotate, it will drive the adjusting ropes to rotate, and the spatial structure will increase or decrease accordingly to adjust the flow rate inside the extruder.

[0007] Preferably, the bracket includes two annular plates and two connecting rods, the fixing frame is located between the two annular plates, the two connecting rods are fixed between the two annular plates, and the adjusting rope is wound around the fixing frame and the two annular plates.

[0008] Preferably, multiple first hooks are fixed on both the inner and outer sides of the annular plate, and multiple third hooks are fixed on the inner wall of the fixing frame. The adjusting rope is engaged between the multiple first hooks and the multiple third hooks.

[0009] Preferably, the reset component is a leaf spring, which includes an arc-shaped steel plate and two reset ears. The arc-shaped steel plate is rotatably connected to the outside of the fixed frame, and both ends of the arc-shaped steel plate are respectively fastened to the two connecting rods. The two reset ears are integrally formed on both sides of the arc-shaped steel plate, and the ends of the reset ears extend to the inside of the two connecting rods. The tension component is fixed to the arc-shaped steel plate.

[0010] Preferably, the tensioning assembly includes a rotating frame and a pull rope, the rotating frame being rotatably connected to a fixed frame, and the pull rope being fixed between the rotating frame and the arc-shaped steel plate.

[0011] Preferably, two second hooks are fixed on the arc-shaped steel plate, the pull rope is a closed loop pull rope, and one end of the pull rope is hooked onto one of the second hooks, and the other end is wrapped around the rotating frame and hooked onto the other second hook.

[0012] Preferably, the drive component is a geared motor, which is detachably connected to the rotating frame.

[0013] Preferably, the extrusion head includes a nozzle and a throat, the nozzle is fixed to the throat, the nozzle is a flexible tube, and the nozzle is located inside the fixing frame, with deformation components extending from both ends of the nozzle.

[0014] This utility model also provides a 3D printer, including the above-mentioned 3D printing extrusion mechanism with stepless adjustment of the extruder head.

[0015] After adopting the above technical solution, the beneficial effects of this utility model are as follows: When the stretching component pulls the reset component to rotate forward, the fixed frame positions the deformation component at the connection point, causing the deformation component to deform and squeeze the extruder head as it rotates, thus infinitely reducing the flow rate within the extruder head. When the reset component resets, it drives the deformation component to reset as well, and the extruder head gradually returns to its original shape, infinitely increasing the flow rate within the extruder head. This design allows for rapid adjustment of the internal flow rate of the extruder head according to actual conditions, effectively improving the working efficiency of the 3D printer. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the practical deformation component and fixing frame; Figure 3 This is another three-dimensional structural diagram of the deformation component and fixing frame of this utility model; Figure 4 This is a three-dimensional structural diagram of the extruder head of this utility model.

[0018] Explanation of reference numerals in the attached drawings: Extrusion head 1, Nozzle 11, Throat 12, Extrudate 2, Gear motor 3, Rotating frame 4, Pull rope 5, Deformation component 6, Annular plate 61, First hook 611, Connecting rod 62, Adjusting rope 63, Reset component 7, Arc-shaped steel plate 71, Second hook 711, Reset ear 72, Fixing frame 8, Third hook 81. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive element, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0021] This embodiment relates to a 3D printing extrusion mechanism with a steplessly adjustable extruder head, such as... Figure 1 As shown, the 3D printer includes a fixed frame 8, a deformation component 6, an extrusion head 1, a reset component 7, a stretching component, and a drive component. The fixed frame 8 is fixed inside the 3D printer. The deformation component 6 is sleeved on the outside of the fixed frame 8 and is detachably connected to the fixed frame 8. The extrusion head 1 is an elastic extrusion head located inside the fixed frame 8, with the deformation component 6 extending from both ends of the extrusion head 1. The reset component 7 is rotatably connected to the fixed frame 8, with a rotation angle range of 0°-90°, and is fixed to the deformation component 6. One end of the stretching component is rotatably connected to the fixed frame 8, and the other end is fixed to the reset component 7. The drive component is connected to the stretching component and is used to drive the stretching component. When the drive component drives the stretching component to rotate forward, the stretching component, in turn, pulls the reset component 7 to rotate forward. Because the fixing frame 8 positions the connection point of the deformation component 6, the deformation component 6 deforms while rotating, squeezing the extruder head 1 and infinitely reducing the flow rate inside the extruder head 1. When the reset component 7 resets, it drives the deformation component 6 to reset, and the extruder head 1 gradually returns to its original shape, infinitely increasing the flow rate inside the extruder head 1. Through the design of this application, the internal flow rate of the extruder head 1 can be quickly adjusted according to the actual situation, which can effectively improve the working efficiency of the 3D printer.

[0022] like Figure 2-3 As shown, the deformation component 6 includes a bracket and multiple adjusting ropes 63. The bracket is sleeved on the outside of the fixed frame 8, and the reset component 7 is fixed on the bracket. The adjusting ropes 63 are preferably two, and the adjusting ropes 63 are preferably closed-loop adjusting ropes. Of course, the adjusting ropes 63 can also be formed by fixing multiple rope segments together to form a closed loop. The adjusting ropes 63 are wound around the fixed frame 8 and the bracket, and a spatial structure is formed between the adjusting ropes 63. When the reset component 7 drives the bracket to rotate, it will drive the adjusting ropes 63 to rotate. The spatial structure will increase or decrease accordingly to adjust the flow rate in the extruder head 1.

[0023] Furthermore, the support includes two annular plates 61 and two connecting rods 62. The fixing frame 8 is located between the two annular plates 61, the two connecting rods 62 are fixed between the two annular plates 61, and the adjusting rope 63 is wound around the fixing frame 8 and the two annular plates 61.

[0024] Specifically, multiple first hooks 611 are fixed on both the inner and outer sides of the annular plate 61, and multiple third hooks 81 are fixed on the inner wall of the fixing frame 8. The adjusting rope 63 is engaged between the multiple first hooks 611 and the multiple third hooks 81 to position the adjusting rope 63 and at the same time form a spatial structure between the adjusting ropes 63.

[0025] like Figure 2As shown, the reset assembly 7 is a leaf spring, which includes an arc-shaped steel plate 71 and two reset ears 72. The arc-shaped steel plate 71 is rotatably connected to the outside of the fixed frame 8, and both ends of the arc-shaped steel plate 71 are respectively fastened to two connecting rods 62. The two reset ears 72 are integrally formed on both sides of the arc-shaped steel plate 71, and the ends of the reset ears 72 extend to the inside of the two connecting rods 62. The tension assembly is fixed to the arc-shaped steel plate 71. When the tension assembly drives the leaf spring to rotate, the two reset ears 72 will abut against the two connecting rods 62; when the reset assembly 7 is reset, the connecting rods 62 cause the bracket and adjusting rope 63 to reset under the pressure of the reset ears 72.

[0026] like Figure 1-2 As shown, the tensioning assembly includes a rotating frame 4 and a pull rope 5. The rotating frame 4 is rotatably connected to the fixed frame 8, and the pull rope 5 is fixed between the rotating frame 4 and the arc-shaped steel plate 71. When the rotating frame 4 rotates, it drives the pull rope 5 to rotate together, and the pull rope 5 drives the reset assembly 7 to rotate.

[0027] Furthermore, two second hooks 711 are fixed on the curved steel plate 71. The pull rope 5 is preferably a closed-loop pull rope. Of course, the pull rope 5 can also be formed by fixing multiple rope segments together to form a closed loop, with one end of the pull rope 5 hooked onto one of the second hooks 711, and the other end wrapped around the rotating frame 4 and hooked onto the other second hook 711. At this time, the pull rope 5 has two stress points on the curved steel plate 71, which helps to make the curved steel plate 71 more stable when rotating.

[0028] like Figure 1 As shown, the driving component is a geared motor 3, which is detachably connected to the rotating frame 4. The geared motor 3 is a bidirectional motor and is used to drive the rotating frame 4 to rotate at low speed, and can drive the rotating frame 4 to rotate in the forward or reverse direction.

[0029] like Figure 1-4 As shown, the extruder head 1 includes a throat 12 and a nozzle 11. The throat 12 is fixed to the nozzle 11, which is a flexible tube and located within the mounting bracket 8. Deformation components 6 extend from both ends of the nozzle 11. The nozzle 11 is used to discharge the extrudate 2. When the adjusting rope 63 deforms, it squeezes the nozzle 11 to change the flow rate within the nozzle 11.

[0030] This utility model also provides a 3D printer, including the above-mentioned 3D printing extrusion mechanism with stepless adjustment of the extrusion head. Since the 3D printer has all the structures and connections of the 3D printing extrusion mechanism with stepless adjustment of the extrusion head, it has all the advantages of the 3D printing extrusion mechanism with stepless adjustment of the extrusion head, which will not be elaborated here.

[0031] The working principle of this utility model is roughly as follows: After the reduction motor 3 is powered on, it will drive the rotating frame 4 to rotate at a low speed, thereby pulling the pull rope 5. After the pull rope 5 is under force, it will drive the leaf spring to rotate at a low speed on the fixed frame 8. At the same time, the reset ear 72 on the leaf spring will abut against the two connecting rods 62. The leaf spring will drive the bracket and the adjusting rope 63 to rotate together. Since the fixed frame 8 is not stationary, the adjusting rope 63 is engaged between multiple first hooks 611 and multiple third hooks 81, so the adjusting rope 63 will deform. As a result, the space formed between the adjusting ropes 63 will become smaller. Both adjusting ropes 63 will squeeze the nozzle 11 in the extruder head 1, so that the flow rate inside the nozzle 11 will decrease, and the flow rate of the nozzle 11 can be infinitely reduced. After the flow rate of the nozzle 11 is adjusted, the reduction motor 3 is turned off.

[0032] If the flow rate inside nozzle 11 needs to be increased later, start the reduction motor 3 to drive the rotating frame 4 to rotate in the opposite direction. The tension applied by the pull rope 5 to the leaf spring will gradually decrease, and the leaf spring will gradually return to its original position. Under the pressure of the return ear 72, the connecting rod 62 will reset the bracket and the adjusting rope 63. The squeezing force of the adjusting rope 63 on nozzle 11 will gradually decrease, thereby increasing the flow rate inside nozzle 11. The flow rate of nozzle 11 can be infinitely increased. After the flow rate of nozzle 11 is adjusted, turn off the reduction motor 3.

[0033] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A 3D printing extrusion mechanism with a steplessly adjustable extruder head, characterized in that, include: Fixture (8); Deformation component (6), which is sleeved on the outside of the fixing frame (8) and is detachably connected to the fixing frame (8); The extrusion head (1) is an elastic extrusion head, and the extrusion head (1) is located inside the fixed frame (8). Deformation components (6) extend from both ends of the extrusion head (1). The reset assembly (7) is rotatably connected to the fixed frame (8) and fixed to the deformation assembly (6); A stretching assembly, one end of which is rotatably connected to a fixed frame (8), and the other end is fixed to a reset assembly (7); A driving component, which is connected to the tensioning component, is used to drive the tensioning component; When the drive component drives the stretching component to rotate in the forward direction, the stretching component will pull the reset component (7) to rotate in the forward direction. Because the fixed frame (8) positions the connection point of the deformation component (6), the deformation component (6) will deform to squeeze the extrusion head (1) while rotating, and the flow rate in the extrusion head (1) will be infinitely reduced. When the reset component (7) resets, it will drive the deformation component (6) to reset, and the extrusion head (1) will gradually return to its original state, and the flow rate in the extrusion head (1) will be infinitely increased.

2. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 1, characterized in that: The deformation component (6) includes a bracket and multiple adjusting ropes (63). The bracket is sleeved on the outside of the fixed frame (8). The reset component (7) is fixed on the bracket. The adjusting ropes (63) are closed-loop adjusting ropes. The adjusting ropes (63) are wrapped around the fixed frame (8) and the bracket. The adjusting ropes (63) form a spatial structure. When the reset component (7) drives the bracket to rotate, it will drive the adjusting ropes (63) to rotate. The spatial structure will increase or decrease accordingly to adjust the flow rate in the extruder (1).

3. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 2, characterized in that: The bracket includes two annular plates (61) and two connecting rods (62). The fixing frame (8) is located between the two annular plates (61), and the two connecting rods (62) are fixed between the two annular plates (61). The adjusting rope (63) is wrapped around the fixing frame (8) and the two annular plates (61).

4. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 3, characterized in that: Multiple first hooks (611) are fixed on both the inner and outer sides of the annular plate (61), and multiple third hooks (81) are fixed on the inner wall of the fixing frame (8). The adjusting rope (63) is engaged between the multiple first hooks (611) and the multiple third hooks (81).

5. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 3, characterized in that: The reset assembly (7) is a leaf spring, which includes an arc-shaped steel plate (71) and two reset ears (72). The arc-shaped steel plate (71) is rotatably connected to the outside of the fixed frame (8), and the two ends of the arc-shaped steel plate (71) are respectively fastened to the two connecting rods (62). The two reset ears (72) are integrally formed on both sides of the arc-shaped steel plate (71), and the ends of the reset ears (72) extend to the inside of the two connecting rods (62). The tension assembly is fixed on the arc-shaped steel plate (71).

6. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 5, characterized in that: The tensioning assembly includes a rotating frame (4) and a pull rope (5). The rotating frame (4) is rotatably connected to the fixed frame (8), and the pull rope (5) is fixed between the rotating frame (4) and the arc-shaped steel plate (71).

7. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 6, characterized in that: Two second hooks (711) are fixed on the arc-shaped steel plate (71). The pull rope (5) is a closed loop pull rope, and one end of the pull rope (5) is hooked onto one of the second hooks (711), and the other end is wrapped around the rotating frame (4) and hooked onto the other second hook (711).

8. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 6, characterized in that: The drive component is a geared motor (3), which is detachably connected to the rotating frame (4).

9. The 3D printing extrusion mechanism with stepless adjustment of the extrusion head according to claim 1, characterized in that: The extrusion head (1) includes a throat (12) and a nozzle (11). The throat (12) is fixed on the nozzle (11). The nozzle (11) is a flexible tube and is located inside the fixing frame (8). Deformation components (6) extend from both ends of the nozzle (11).

10. 3D printer, characterized in that, Including a 3D printing extrusion mechanism with an infinitely adjustable extrusion head as described in any one of claims 1-9.

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