Adjustable printhead device for 3D printer

Abstract

The present invention relates to the technical field of 3D printing, and provides an adjustable printhead device for a 3D printer. The adjustable printhead device comprises a base plate, an inner tube, an outer tube, and an adjusting member; the inner tube is rotatably arranged on the base plate and has an inner channel, the inner tube is provided with an inner feed port and an inner discharge port, and a stirring portion is provided on an outer shaft wall of the inner tube; the outer tube is sleeved outside the inner tube and is movably arranged on the base plate, an outer channel is defined among the outer tube, the base plate and the inner tube, the base plate is provided with an outer feed port connected to the outer channel, the bottom end of the outer tube is provided with an outer discharge port, and the distance between the outer discharge port and the inner discharge port is adjustable due to the movement of the outer tube relative to the base plate; the adjusting member is arranged on the outer tube and can rotate around the axis of the adjusting member, a plurality of adjusting holes corresponding to the outer discharge port are provided on the adjusting member, and each adjusting hole can at least partially overlap with the outer discharge port.

Description

Adjustable nozzle device for 3D printer TECHNICAL FIELD

[0001] The present application relates to the technical field of 3D printing, in particular to an adjustable nozzle device for 3D printer. BACKGROUND

[0002] The nozzle in the 3D printer is the main structure for discharging, and the material in a flowing state is discharged through the discharging channel in the nozzle. However, due to the fixed structure of the nozzle, the function is single, and only a single solid material can be printed, which not only wastes materials, but also makes the printing process less flexible.

[0003] SUMMARY

[0004] The present application provides an adjustable nozzle device for 3D printer, comprising: a base plate; an inner tube rotatably arranged on the base plate and having an inner channel, an inner feeding port communicated with the inner channel is arranged on the inner tube, an inner discharging port is arranged at the bottom end of the inner tube, and a stirring part is arranged on the outer shaft wall of the inner tube; an outer tube is sleeved outside the inner tube and movably arranged on the base plate, the outer tube, the base plate and the inner tube define an outer channel, an outer feeding port communicated with the outer channel is arranged on the base plate, an outer discharging port is arranged at the bottom end of the outer tube, and the distance between the outer discharging port and the inner discharging port can be adjusted due to the movement of the outer tube relative to the base plate; an adjusting member is arranged on the outer tube and rotatably arranged on the outer tube about its axis, a plurality of adjusting holes are arranged on the adjusting member corresponding to the outer discharging port, and each adjusting hole can at least partially coincide with the outer discharging port due to the rotation of the adjusting member.

[0005] The present application has the following advantages:

[0006] (1) The flexibility of the adjustable nozzle device for 3D printer in use is improved;

[0007] (2) The stirring effect is good, which is beneficial to reduce the resistance of the spiral blade in use;

[0008] (3) The through hole on the spiral blade is beneficial to further reduce the resistance in use;

[0009] (4) The position of the outer discharging port can be adjusted conveniently;

[0010] (5) The structure of the adjusting shaft and the adjusting plate is simple, and the installation on the outer tube is convenient;

[0011] (6) The structure of the adjusting arm and the adjusting hole is simple, and the use effect is good.

[0012] (7) By setting a chamfer on the edge of the adjusting arm, it is convenient for the adjusting arm to rotate to the outer discharge port, so that the outer discharge port cooperates with the adjusting hole, and it is also convenient for the outer discharge port and the inner discharge port to discharge materials;

[0013] (8) By setting a guide groove, the stability of the adjusting shaft when rotating with the outer tube is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is a structural schematic diagram of the present application from one perspective;

[0015] Fig. 2 is a structural schematic diagram of the present application from another perspective;

[0016] Fig. 3 is a top view of the nozzle of the present application;

[0017] Fig. 4 is a sectional view in the direction of A-A in Fig. 3;

[0018] Fig. 5 is a structural schematic diagram of the substrate of the present application;

[0019] Fig. 6 is a structural schematic diagram of the outer tube of the present application;

[0020] Fig. 7 is a structural schematic diagram of the inner tube of the present application;

[0021] Fig. 8 is a structural schematic diagram of the adjusting member of the present application;

[0022] Fig. 9 is an enlarged view of part B in Fig. 8. DETAILED DESCRIPTION

[0023] The present embodiment relates to an adjustable nozzle device for a 3D printer, which comprises a substrate 1, an inner tube 2, an outer tube 3 and an adjusting member. The inner tube 2 is rotatably arranged on the substrate 1 and has an inner channel. An inner inlet 202 is arranged on the inner tube 2 and communicates with the inner channel. An inner outlet is arranged at the bottom end of the inner tube 2, and a stirring part is arranged on the outer shaft wall of the inner tube 2.

[0024] The outer tube 3 is sleeved on the outer tube 2 and movably arranged on the substrate 1. The outer tube 3, the substrate 1 and the inner tube 2 define an outer channel. An outer inlet 104 is arranged on the substrate 1 and communicates with the outer channel. An outer outlet is arranged at the bottom end of the outer tube 3. The distance between the outer outlet and the inner outlet is adjustable due to the movement of the outer tube 3 relative to the substrate 1. The adjusting member is arranged on the outer tube 3 and rotatably arranged on the outer tube 3 about its own axis. A plurality of adjusting holes 5011 are arranged on the adjusting member corresponding to the outer outlet. Due to the rotation of the adjusting member, each adjusting hole 5011 can at least partially coincide with the outer outlet.

[0025] An exemplary structure of the adjustable nozzle device of the 3D printer of the present embodiment is shown in FIG. 1 and FIG. 2, wherein the base plate 1 is used as the mounting base, and the structure is simple and easy to design and implement. The structure of the inner tube 2 is shown in FIG. 3, FIG. 4 and FIG. 7. In order to facilitate the mounting of the inner tube 2 on the base plate 1, a bearing is provided on the base plate 1, and a connecting section 204 is provided on the top of the inner tube 2, the radial cross-sectional area of the connecting section 204 is smaller than that of the inner tube 2, the connecting section 204 is mounted on the inner ring of the bearing and extends out of the base plate 1. The inner feeding port 202 is provided on the top of the connecting section 204.

[0026] The inner nozzle 207 is connected to the inner discharge port of the inner tube 2, the bottom of the inner nozzle 207 is conical, and it can be connected to the bottom end of the inner tube 2 in a screwing manner. In order to realize the rotating mounting of the inner tube 2 on the base plate 1, as shown in FIG. 1 to FIG. 3, a first motor 103 is provided on the upper surface of the base plate 1, a driving wheel 1031 is connected to the power output end of the first motor 103, a driven wheel 201 is provided on the connecting section 204, and a transmission belt 203 is sleeved on the driving wheel 1031 and the driven wheel 201. Under the drive of the first motor 103, the driving wheel 1031 drives the driven wheel 201 to rotate the inner tube 2 through the transmission belt 203.

[0027] The stirring part is a spiral blade 205 spirally arranged on the inner tube 2, and the specification of the spiral blade 205 gradually decreases along the direction of discharge. As shown in FIG. 4, the spiral blade 205 is arranged spirally downward along the direction from top to bottom, so as to improve the stirring effect of the material in the outer channel. The specification of the spiral blade 205 refers to the distance between the edge of the spiral blade 205 and the axis of the inner tube 2, which gradually decreases along the direction from top to bottom. This is beneficial to reducing the resistance of stirring while stirring the material.

[0028] In order to further reduce the resistance of the spiral blade 205 in use, a plurality of through holes 206 are provided on the spiral blade 205, and the diameter of the through holes 206 gradually decreases along the direction of discharge. As a preferred, the through holes 206 on the adjacent two spiral blade 205 segments are arranged alternately.

[0029] The outer tube 3 is columnar, and the top is open. The outer tube 3 is coaxially arranged with the inner tube 2. A threaded hole is provided on the base plate 1, and the top of the outer tube 3 is movably connected to the base plate 1 through the threaded hole. As shown in FIG. 5 and FIG. 6, an outer thread 304 is provided on the outer peripheral wall of the top of the outer tube 3, and corresponding to the outer tube 3, a convex ring 102 is provided on the bottom of the base plate 1, and an inner thread is provided on the inner wall surface of the convex ring 102. The outer tube 3 is connected to the base plate 1 through the threaded connection of the outer thread 304 and the inner thread. In addition, an outer nozzle 301 is threadedly connected to the outer discharge port of the bottom of the outer tube 3, and the bottom of the outer nozzle 301 is also conical.

[0030] The outer tube 3 is connected to the base plate 1 by screwing, which is convenient to install, and the position of the outer tube 3 can be adjusted by changing the length of the screwing between the protrusion and the outer tube 3, so as to change the distance between the discharge port of the outer nozzle 301 and the inner nozzle 207. In this embodiment, the discharge effect of the nozzle can be changed by changing the distance between the discharge port of the outer nozzle 301 and the inner nozzle 207 and the discharge of the inner tube 2 and / or the outer tube 3.

[0031] When only the inner tube 2 or the outer tube 3 discharges, the single solid structure can be excluded, and when the inner tube 2 and the outer tube 3 discharge respectively, the solid materials of both can be discharged. When the distance between the discharge ports of the outer nozzle 301 and the inner nozzle 207 is large, the size of the material between the inner tube 2 and the outer tube 3 is large, and vice versa.

[0032] The adjusting member includes an adjusting shaft 5 rotatably arranged outside the outer tube 3, and an adjusting plate detachably connected to the bottom end of the adjusting shaft 5, and adjusting holes 5011 are arranged on the adjusting plate, and the distance between the center of at least one adjusting hole 5011 and the adjusting shaft 5 is not equal.

[0033] Referring to FIGS. 1, 2 and 8, the adjusting shaft 5 in this embodiment is arranged parallel to the axial direction of the outer tube 3. In order to facilitate the installation of the adjusting shaft 5, upper and lower mounting blocks 302 and 303 are arranged on the outer peripheral wall of the outer tube 3 in the height direction, and upper and lower bearings are respectively arranged on the upper and lower mounting blocks 302 and 303, and the adjusting shaft 5 passes through the inner rings of the upper and lower bearings. A second motor 4 is arranged on the lower mounting plate, a driving gear 401 is arranged on the second motor 4, and a driven gear 502 is arranged on the adjusting shaft 5 corresponding to the driving gear 401. Under the driving of the second motor 4, the driving gear 401 and the driven gear 502 mesh to drive the adjusting shaft 5 to rotate.

[0034] The adjusting plate is connected to the bottom end of the adjusting shaft 5, and has three adjusting arms 501 arranged around the circumference, and three adjusting holes 5011 are respectively arranged on the corresponding adjusting arms 501. Among them, the distance between the center of two second adjusting holes 5011 and the adjusting shaft 5 is equal, but the diameters are not equal. When the larger adjusting hole 5011 is rotated to the discharge port of the outer nozzle 301, the adjusting hole 5011 is completely coincident with the discharge port. When the smaller adjusting hole 5011 is rotated to the discharge port of the outer nozzle 301, the adjusting hole 5011 is coaxial with the discharge port, but covers the outer periphery of the discharge port, so as to reduce the actual area of the discharge port.

[0035] When the third adjusting hole 5011 of the three adjusting holes 5011 is rotated to the discharge port of the outer nozzle 301, it is not concentric with the discharge port, and at the same time, it partially covers the discharge port.

[0036] The number of the adjusting arms 501 can be increased or decreased according to the use requirement, and the size of the adjusting hole 5011 is designed according to the use requirement.

[0037] In order to improve the use effect of the adjusting arm 501, a chamfer is arranged at the edge of the adjusting arm 501 corresponding to the adjusting hole 5011, which not only facilitates the rotation of the adjusting arm 501 to the bottom of the outer nozzle 301 and abutting on the bottom surface of the outer nozzle 301, but also facilitates the cutting of the materials discharged from the inner pipe 2 and the outer pipe 3.

[0038] Corresponding to the top end of the adjusting shaft 5, a ring-shaped guide groove is arranged on the base plate 1, and the top end of the adjusting shaft 5 is guided to slide in the guide groove. Two ring-shaped protrusions 101 are arranged on the base plate 1 in a spaced manner, and the guide groove is defined between the two ring-shaped protrusions 101 and the base plate 1.

[0039] As shown in FIG. 9, a connecting hole 504 is arranged on the adjusting plate, a protrusion is arranged on the inner circumferential wall of the connecting hole 504, a mounting groove 503 is arranged on the outer circumferential wall of the bottom end of the adjusting shaft 5 corresponding to the protrusion, the mounting groove 503 includes a first part 5032 extending in the axial direction, and a second part 5031 connected with the first part 5032 and arranged in the circumferential direction, and a limiting protrusion 5033 is arranged at the connection position of the first part 5032 and the second part 5031. The opening of the first part 5032 is located at the bottom end of the adjusting shaft 5, the protrusion can slide into the first part 5032 along the axial direction of the adjusting shaft 5, and when the protrusion reaches the end of the first part 5032, the adjusting plate is rotated to make the protrusion slide into the second part 5031 by passing the limiting protrusion 5033, and the protrusion is limited in the second part 5031 by the limiting protrusion 5033.

[0040] When the adjusting plate needs to be replaced, the adjusting plate is reversely rotated to make the protrusion pass the limiting protrusion 5033, and then the protrusion is slid out of the first part 5032 along the axial direction of the adjusting shaft 5.

[0041] The outer surface of the limiting protrusion 5033 is in a circular arc shape, which facilitates the protrusion to pass the limiting protrusion 5033, and facilitates the mounting and dismounting between the adjusting plate and the adjusting shaft 5. In order to improve the connection effect between the adjusting plate and the adjusting shaft 5, the rotating direction of the adjusting shaft 5 in this embodiment is the same as the direction in which the protrusion slides into the second part 5031.

[0042] When there is material in the outer channel during use, the first motor 103 is started to drive the inner pipe 2 to rotate, and the material in the outer channel is stirred by the helical blade 205. When the size of the discharge port needs to be changed, the corresponding adjusting hole 5011 is adjusted to the bottom of the discharge port of the outer nozzle 301 by starting the second motor 4.

[0043] By setting the stirring part on the outer peripheral wall of the inner tube 2, the discharge effect of the outer channel is improved, and by moving the outer tube 3 relative to the base plate 1, the spacing between the outer discharge port and the inner discharge port can be adjusted, so that the different discharge structures of the nozzle are changed, and by adjusting the adjusting hole 5011 on the adjusting part, at least part of the outer discharge port is overlapped, so that the position and size of the outer discharge port are changed.

Claims

1. A nozzle device for an adjustable 3D printer, characterized in that, The utility model relates to a kind of agitator, including: Substrate (1); Inner tube (2), rotatably arranged on the substrate (1), and having inner channel, the inner tube (2) is equipped with inner feed port (202) being communicated with the inner channel, the bottom end of the inner tube (2) is equipped with inner discharge port, and stirring portion is equipped on the outer shaft wall of the inner tube (2); Outer tube (3), sleeve is equipped in the inner tube (2) outside, and movably arranged on the substrate (1), the outer tube (3) and the substrate (1) and the inner tube (2) between limit outer channel, the substrate (1) is equipped with outer feed port (104) being communicated with the outer channel, the bottom end of the outer tube (3) is equipped with outer discharge port respectively, the spacing between the outer discharge port and the inner discharge port can be adjusted by the movement of the outer tube (3) relative to the substrate (1); Adjusting member, arranged on the outer tube (3), and rotatably arranged on the outer tube (3) around its axis, corresponding to the outer discharge port, a plurality of adjusting holes (5011) are equipped on the adjusting member, due to the rotation of the adjusting member, each adjusting hole (5011) can at least partially coincide with the outer discharge port.

2. The adjustable nozzle assembly for a 3D printer of claim 1, wherein: The stirring portion adopts helical blade (205) arranged on the inner tube (2) by helix, the specification of the helical blade (205) is gradually reduced along the direction of discharge.

3. The adjustable nozzle assembly for a 3D printer of claim 2, wherein: A plurality of through holes (206) are equipped on the helical blade (205), the diameter of the through hole (206) is gradually reduced along the direction of discharge.

4. The adjustable nozzle assembly for a 3D printer of claim 1, wherein: Threaded hole is equipped on the substrate (1), and the top of the outer tube (3) is movably connected to the substrate (1) through the threaded hole.

5. The adjustable nozzle arrangement for a 3D printer according to any one of claims 1 to 4, characterized in that: The adjusting member includes adjusting shaft (5) rotatably arranged outside the outer tube (3), and adjusting plate detachably connected to the bottom end of the adjusting shaft (5), the adjusting hole (5011) is arranged on the adjusting plate, and the spacing between the center of at least one adjusting hole (5011) and the adjusting shaft (5) is not equal.

6. The adjustable nozzle assembly for a 3D printer of claim 5, wherein: The adjusting plate has a plurality of adjusting arms (501) arranged at intervals around its circumference, and the adjusting hole (5011) is arranged on the corresponding adjusting arm (501).

7. The adjustable nozzle assembly for a 3D printer of claim 5, wherein: Corresponding to the top end of the adjusting shaft (5), a ring-shaped guide groove is arranged on the substrate (1), and the top end of the adjusting shaft (5) is guided to slide in the guide groove.

8. The adjustable nozzle assembly for a 3D printer of claim 5, wherein: A connecting hole (504) is arranged on the adjusting plate, a protrusion is arranged on the inner circumferential wall of the connecting hole (504), corresponding to the protrusion, a mounting groove (503) is formed on the outer circumferential wall of the bottom end of the adjusting shaft (5), the mounting groove (503) includes a first portion (5032) extending in the axial direction, and a second portion (5031) connected to the first portion (5032) and arranged in the circumferential direction, and a limiting protrusion (5033) is arranged at the connection between the first portion (5032) and the second portion (5031), the protrusion enters the second portion (5031) through the first portion (5032), and is limited in the second portion (5031) by the limiting protrusion (5033).

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