WO2022110471A1

WO2022110471A1 - 3d printing extrusion device and 3d printer

Info

Publication number: WO2022110471A1
Application number: PCT/CN2020/140123
Authority: WO
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 严罗林
Original assignee: 深圳市创想三维科技有限公司
Priority date: 2020-11-26
Filing date: 2020-12-28
Publication date: 2022-06-02
Also published as: CN112571786A

Abstract

A 3D printing extrusion device and a 3D printer. The 3D printing extrusion device comprises a feeding member (1), a driving gear (2), a first driven gear (31) and a second driven gear (41); one end of the feeding member (1) is provided with a discharge channel (11), and the other end thereof is provided with a first feeding channel (12) and a second feeding channel (13) both connected to the discharge channel (11); the driving gear (2) is provided at the ends of the first feeding channel (12) and the second feeding channel (13) away from the discharge channel (11); and the first driven gear (31) can be selectively engaged with the driving gear (2) so as to feed materials to the first feeding channel (12), and the second driven gear (41) can be selectively engaged with the driving gear (2) so as to feed materials to the second feeding channel (13). The first feeding channel (12) and the second feeding channel (13) are provided on the feeding member (1) to sequentially feed the materials to the discharge channel (11), and the first driven gear (31) and the second driven gear (41) are selectively engaged with the driving gear (2) to achieve automatic material exchange, thereby increasing the printing efficiency.

Description

A 3D printing extrusion device and 3D printer

technical field

The invention relates to the technical field of 3D printers, in particular to a 3D printing extrusion device and a 3D printer.

Background technique

3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing. It is a digital model file based, using powder metal or plastic and other adhesive materials, through layer-by-layer printing to construct. object technology.

At present, for 3D printers using rod-shaped materials, when a rod-shaped material is used, it is usually necessary to stop printing and replace the material, which greatly reduces the printing efficiency.

Therefore, there is an urgent need for a 3D printing extrusion device to solve the above problems.

SUMMARY OF THE INVENTION

Based on the above, the purpose of the present invention is to provide a 3D printing extrusion device and a 3D printer, which can automatically change materials and have high printing efficiency.

For achieving the above object, the present invention adopts the following technical solutions:

A 3D printing extrusion device, comprising:

a feeding part, one end of which is provided with a discharging channel, and the other end is provided with a first feeding channel and a second feeding channel which are both connected with the discharging channel;

a driving gear, arranged at one end of the first feeding channel and the second feeding channel away from the discharging channel;

A first driven gear and a second driven gear, the first driven gear can be selectively meshed with the driving gear to supply material to the first feeding channel, the second driven gear can be with the drive gear is selectively meshed to supply material to the second supply channel;

A driving member drives the driving gear to rotate. The material is supplied to the discharge channel through two feeding channels in turn; the first driven gear and the second driven gear are selectively meshed with the driving gear to realize automatic material change, which improves the printing efficiency.

As a preferred solution of a 3D printing extrusion device, it further includes an extrusion body, a first driven member and a second driven member, the first driven gear is arranged on the first driven member, and the first driven gear is arranged on the first driven member. Two driven gears are arranged on the second driven member, and the feeding member, the driving gear, the first driven member and the second driven member are all arranged on the extrusion body . The extrusion body, the first driven member and the second driven member are used to realize the connection and installation of the feeding member, the driving gear, the first driven gear and the second driven gear.

As a preferred solution of a 3D printing extrusion device, an elastic member is disposed between the first driven member and the second driven member, and the elastic member can extend to the first driven gear and the second driven member. The second driven gear provides elastic force in the direction of the driving gear. The elastic member is used to enable the driven member after the feeding is completed to drive the corresponding driven gear and the driving gear 2 to maintain the meshing state.

As a preferred solution of a 3D printing extrusion device, it further includes a first feeding part and a second feeding part, the first feeding part is connected with the first driven part, so that the first feeding part can be The driving gear and the driving gear are disengaged, and the second feeding member is connected with the second driven member, so that the second driven gear and the driving gear can be disengaged. The first feeding part and the second feeding part are used to realize feeding the 3D printing extrusion device.

As a preferred solution of a 3D printing extrusion device, it further includes a material changer, the material changer can selectively disengage the first driven gear and the driving gear or make the second driven gear disengaged from the drive gear. The exchanging member is used to achieve selective meshing between the first driven gear and the second driven gear and the driving gear.

As a preferred solution of a 3D printing extrusion device, the material changing element includes a steering gear and a cam arranged at the movable end of the steering gear, and the cam can selectively make the first steering gear rotate as the steering gear rotates. The driven gear or the second driven gear is disengaged from the driving gear. When the long diameter of the cam is in contact with a driven gear, the driven gear is disengaged from the driving gear.

As a preferred solution of the 3D printing extrusion device, the first feeding channel and the second feeding channel are provided with feeding limit protrusions. Use to limit the loading position of the material.

As a preferred solution of a 3D printing extrusion device, it also includes a detection member disposed at one end of the driving gear away from the feeding member, the detection member is provided with a first detection channel and a second detection channel, the first detection channel A detection channel is used to detect whether a material enters the first driven gear and the driving gear, and the second detection channel is used to detect whether a material enters the second driven gear and the driving gear. The detection part is used to detect whether there is material entering into the feeding part.

As a preferred solution of a 3D printing extrusion device, it further includes a material guide member disposed between the feeding member and the driving gear, and the material guide member is provided with a first material guide channel and a second material guide channel, through which the material between the first driven gear and the driving gear can enter the first feeding channel through the first material guide channel; through the second driven gear and the driving gear The materials in between can enter the second supply channel through the second guide channel. The material guide is used to guide the material.

A 3D printer, comprising the 3D printing extrusion device described in any one of the above solutions.

The beneficial effects of the present invention are:

By setting the first feeding channel and the second feeding channel on the feeding part, feeding the discharging channel sequentially through the two feeding channels, and setting the driving gear, the first driven gear and the second driven gear, When the driving gear meshes with the first driven gear, the material is supplied to the discharge channel through the first feeding channel, and when the driving gear meshes with the second driven gear, the material is supplied to the discharge channel through the second feeding channel. The time required to stop and change materials after a certain channel of materials is used is reduced, and the first driven gear and the second driven gear are selectively meshed with the driving gear to realize automatic material change, which improves the printing efficiency.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. , for those of ordinary skill in the art, other drawings can also be obtained according to the contents of the embodiments of the present invention and these drawings without creative efforts.

1 is a schematic diagram of a 3D printing extrusion device provided by a specific embodiment of the present invention;

2 is a cross-sectional view of a 3D printing extrusion device provided by a specific embodiment of the present invention;

3 is a schematic diagram of a driving gear of a 3D printing extrusion device provided by a specific embodiment of the present invention;

FIG. 4 is a cross-sectional view of a state in which the cam and the first follower are in contact with the 3D printing extrusion device provided by the specific embodiment of the present invention.

In the picture:

1. Feeding parts; 11. Discharging channel; 12. First feeding channel; 13. Second feeding channel; 14. Loading limit protrusion;

2. Driving gear; 21. Driving part; 22. Groove;

31, the first driven gear; 32, the first follower; 33, the first feeding part; 34, the elbow; 35, the first abutment block; 36, the first shaft;

41, the second driven gear; 42, the second follower; 43, the second feeder; 44, the second abutment block; 45, the second shaft;

5. Extrusion body; 51. Elastic parts;

61, steering gear; 62, cam;

7. Detection part; 71. The first detection channel; 72. The second detection channel;

8. Material guide; 81, First material guide channel; 82, Second material guide channel; 83, Concave surface;

100. Materials.

Detailed ways:

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only the present invention. Some examples, but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 and FIG. 2 , this embodiment provides a 3D printing extrusion device for a 3D printer, the device includes a feeding member 1 , a driving gear 2 , a first driven gear 31 and a second driven gear 41. One end of the feeding member 1 is provided with a discharging channel 11, and the other end is provided with a first feeding channel 12 and a second feeding channel 13 which are both connected to the discharging channel 11; the driving gear 2 is provided in the first feeding channel. 12 and one end of the second feeding channel 13 away from the discharging channel 11; the first driven gear 31 can selectively engage with the driving gear 2 to supply material to the first feeding channel 12, and the second driven gear 41 can The driving gear 2 is selectively meshed to supply material to the second supply channel 13 .

By arranging the first feeding channel 12 and the second feeding channel 13 on the feeding member 1, the discharging channel 11 is fed sequentially through the two feeding channels, and the driving gear 2, the first driven gear 31 and the The second driven gear 41, when the driving gear 2 meshes with the first driven gear 31, feeds the discharge channel 11 through the first feeding channel 12, and when the driving gear 2 meshes with the second driven gear 41, The discharge channel 11 is supplied with material through the second feeding channel 13, which reduces the time required to stop and change the material after the material 100 of a certain channel is used. The driving gear 2 meshes to realize automatic material change, which improves the printing efficiency.

Specifically, as shown in FIGS. 1 and 2 , the 3D printing extrusion device further includes an extrusion body 5 , a first follower 32 and a second follower 42 , and the first driven gear 31 is rotatably arranged on the first follower. On the driven member 32, the second driven gear 41 is rotatably arranged on the second driven member 42, and the feeding member 1, the driving gear 2, the first driven member 32 and the second driven member 42 are all arranged on the extrusion body 5 , and the driving gear 2 , the first follower 32 and the second follower 42 are rotatably arranged with the extrusion body 5 .

Further, as shown in FIG. 1 and FIG. 2 , the first driven member 32 is provided with a first rotating shaft 36 , and the first driven member 32 and the first driven gear 31 are relative to the extrusion body 5 along the first rotating shaft 36 . Rotate to achieve selective meshing between the first driven gear 31 and the driving gear 2; the second driven member 42 is provided with a second rotating shaft 45, and the second driven member 42 and the second driven gear 41 The two rotating shafts 45 rotate relative to the extrusion body 5 to achieve selective meshing between the second driven gear 41 and the driving gear 2 .

Further, as shown in FIG. 1 and FIG. 2 , a driving member 21 is arranged below the extrusion body 5 , the driving gear 2 is arranged on the driving end of the driving member 21 , and the driving member 21 can drive the driving gear 2 to rotate. The driving gear 2 is coaxially provided with a driving wheel, correspondingly, the first driven gear 31 is coaxially provided with a first driven wheel, and the second driven gear 41 is coaxially provided with a second driven wheel. When the driving gear 31 meshes with the driving gear 2, the material 100 can enter the first feeding channel 12 through between the rotating driving gear and the first driven wheel. When the second driven gear 41 meshes with the driving gear 2, the material 100 can enter the first feeding channel 12. Enter the second feeding channel 13 through between the rotating driving pulley and the second driven pulley. As shown in FIG. 3 , in order to position and guide the rod-shaped material 100, grooves 22 are provided on the outer peripheral wall of the driving wheel. Correspondingly, grooves are provided on the outer peripheral walls of the first driven wheel and the second driven wheel. 22. The material 100 is placed between the driving wheel and the opposite groove 22 of the first driven wheel or the driving wheel or the second driven wheel.

As shown in FIG. 1 and FIG. 2 , the 3D printing extrusion device further includes a material guide member 8 disposed between the material supply member 1 and the driving gear 2 for guiding the material 100 . Correspondingly, the material guide 8 is provided with a concave surface 83 which is matched with the driving gear 2 , the first driven gear 31 and the second driven gear 32 , so as to facilitate the visualization of the operation process and facilitate the operator to view the first driven gear 31 , the relative position of the second driven gear 32 and the driving gear 2; the material guide 8 is provided with a first material guide channel 81 and a second material guide channel 82, through which the material 100 between the first driven wheel and the driving wheel can pass through The first material guide channel 81 enters the first material supply channel 12 ; the material 100 passing between the second driven wheel and the driving wheel can enter the second material supply channel 13 through the second material guide channel 82 .

Further, in order to realize the feeding of the 3D printing extrusion device, as shown in FIG. 1 and FIG. 2 , the 3D printing extrusion device further includes a first feeding part 33 and a second feeding part 43 . The first feeding part 33 is connected to the first follower 32, and the first feeder 33 is toggled. The first follower 32 and the first driven gear 31 rotate relative to the extrusion body 5 along the first rotating shaft 36, and the first driven gear 31 and the driving gear 2 are disengaged, the second feeding member 43 is connected with the second driven member 42, and the second feeding member 43 is toggled, the second driven member 42 and the second driven gear 41 along the second rotating shaft 45 Rotating relative to the extrusion body 5, the second driven gear 41 and the driving gear 2 are disengaged. In this embodiment, an elbow 34 is provided at one end of the first feeding member 33 and the second feeding member 43 away from the driving gear 2, so that the operator can easily move the first feeding member 33 and the second feeding member 43, so that the Manual feeding is more convenient.

Preferably, as shown in FIG. 2 , the first feeding channel 12 and the second feeding channel 13 are provided with feeding limiting protrusions 14 for limiting the feeding position of the material 100 . When the material 100 is not loaded to the top When the material limit protrusion 14 is placed, there will be a long feeding time after printing starts, so that the material 100 moves to the discharge channel 11, which affects the printing efficiency; when the material 100 is loaded beyond the feeding limit protrusion 14, The material 100 in the two feeding channels interfered, resulting in abnormal discharge.

When feeding is required, firstly turn the first feeding member 33, the first driven member 32 drives the first driven gear 31 to disengage from the driving gear 2, and the material 100 is placed between the first driven wheel and the driving wheel respectively. and then pass through the first feeding channel 81 and the first feeding channel 12 in sequence, and reach the feeding limit protrusion 14; then the second feeding member 43 is toggled, and the second driven member 42 drives the second driven member The gear 41 is disengaged from the driving gear 2, and the material 100 is placed between the second driven wheel and the driving wheel respectively, and then passes through the second material guide channel 82 and the second material supply channel 13 in turn, and reaches the feeding limit protrusion. 14; Or move the first feeding part 33 and the second feeding part 43 at the same time, and then complete the feeding of the two materials 100 in turn; finally reset the first feeding part 33 and the second feeding part 43 to realize the material 100 feed.

In this embodiment, as shown in FIG. 2 , an elastic member 51 is provided between the first driven member 32 and the second driven member 42 , and the elastic member 51 can move the first driven gear 31 and the second driven gear 41 to the The elastic force is provided towards the driving gear 2, so that the driven member after the feeding is completed can drive the corresponding driven gear and the driving gear 2 to maintain the meshing state.

Further, in order to achieve selective meshing between the first driven gear 31 and the second driven gear 41 and the driving gear 2, the 3D printing extrusion device further includes a material changer, which can selectively push the first driven gear 41. The driven member 32 disengages the first driven gear 31 from the driving gear 2 , or pushes the second driven member 42 to disengage the second driven gear 41 from the driving gear 2 .

In this embodiment, as shown in FIG. 4 , the refueling member includes a steering gear 61 and a cam 62 arranged at the movable end of the steering gear 61 , and the cam 62 can selectively make the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 31 or the first driven gear 61 rotate with the rotation of the steering gear 62 in this embodiment. The two driven gears 41 are disengaged from the driving gear 2 . Exemplarily, as shown in FIG. 4 , when the long diameter of the cam 62 is in contact with the first follower 32, the first driven gear 31 is disengaged from the driving gear 2; when the long diameter of the cam 62 is in contact with the second follower When the movable member 42 is in contact, the second driven gear 41 is disengaged from the driving gear 2 .

Preferably, as shown in FIG. 1 and FIG. 4 , the first follower 32 is provided with a first abutment block 35 , the second follower 42 is provided with a second abutment block 44 , and the cam 62 can selectively interact with the The first abutting block 35 or the second abutting block 44 abuts against each other, so as to reduce the damage of the cam 62 to the loading part.

As shown in FIG. 1 and FIG. 2 , the 3D printing extrusion device further includes a detection member 7 disposed at one end of the driving gear 2 away from the feeding member 1 . The detection member 7 is provided with a first detection channel 71 and a second detection channel 72 . A detection channel 71 is used to detect whether the material 100 enters the first driven gear 31 and the driving gear 2 , and the second detection channel 72 is used to detect whether the material 100 enters the second driven gear 41 and the driving gear 2 . Wherein, how the detection member 7 detects whether there is material 100 in the first detection channel 71 and the second detection channel 72 is in the prior art, and details are not described herein again.

When the feeding is completed, the long diameter end of the cam 62 is in contact with the second driven member 42, so that the second driven gear 41 is disengaged from the driving gear 2, and the first driven gear 31 is meshed with the driving gear 2. The driving member 21 drives the driving wheel to rotate, and the material 100 in the first detection channel 71 sequentially passes between the first driven wheel and the driving wheel, the first material guide channel 81 and the first feed channel 12 into the discharge channel 11 for 3D Printing; until the material 100 printed in the first detection channel 71 is used up, at this time, the driving member 21 drives the driving wheel to reversely rotate a certain angle, so that the material 100 is returned from the discharge channel 11 to the first supply channel 12, and then The steering gear 61 drives the cam 62 to rotate, so that the long diameter of the cam 62 is in contact with the second driven member 42 , so that the first driven gear 31 is disengaged from the driving gear 2 , and the second driven gear 41 is contacted with the driving gear. 2 meshing, the driving member 21 continues to drive the driving wheel to rotate in the reverse direction, and the material 100 in the second detection channel 72 enters through the second driven wheel and the driving wheel, the second material guide channel 82, and the second feeding channel 13. The discharge channel 11 is 3D printed to realize automatic material change.

This embodiment also discloses a 3D printer, including a mobile device and the above-mentioned 3D printing extrusion device disposed on a mobile end of the mobile device.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include other equivalent embodiments without departing from the concept of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings, only for the purpose of It is convenient to describe the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance. Therein, the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; may be mechanical connection or electrical connection; may be direct connection or indirect connection through an intermediate medium, and may be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Claims

A 3D printing extrusion device, comprising:

A feeding member (1) is provided with a discharging channel (11) at one end and a first feeding channel (12) and a second feeding channel (13) which are both connected to the discharging channel (11) at the other end. );

a driving gear (2), disposed at one end of the first feeding channel (12) and the second feeding channel (13) away from the discharging channel (11);

A first driven gear (31) and a second driven gear (41), the first driven gear (31) can be selectively meshed with the driving gear (2) to supply the first feeding channel (12) feeding, the second driven gear (41) can selectively engage with the driving gear (2) to feed the second feeding channel (13);

A driving member (21), the driving member (21) drives the driving gear (2) to rotate.
The 3D printing extrusion device according to claim 1, further comprising an extrusion body (5), a first follower (32) and a second follower (42), the first follower The gear (31) is arranged on the first driven member (32), the second driven gear (41) is arranged on the second driven member (42), the feeding member (1), The driving gear (2), the first follower (32) and the second follower (42) are all arranged on the extrusion body (5).
The 3D printing extrusion device according to claim 2, characterized in that, an elastic member (51) is provided between the first follower (32) and the second follower (42), and the The elastic member (51) can provide the first driven gear (31) and the second driven gear (41) with an elastic force in the direction of the driving gear (2).
The 3D printing extrusion device according to claim 2, further comprising a first feeding part (33) and a second feeding part (43), the first feeding part (33) being connected to the The first driven member (32) is connected, so that the first driven gear (31) and the driving gear (2) can be disengaged, and the second feeding member (43) is connected with the second driven gear The second driven gear (41) can be disengaged from the driving gear (2) by connecting the second driven gear (41).
The 3D printing extrusion device according to claim 1, characterized in that it further comprises a material changing part, and the material changing part can selectively make the first driven gear (31) and the driving gear (2) Disengage or disengage the second driven gear (41) and the driving gear (2).
The 3D printing extrusion device according to claim 5, characterized in that, the material changing part comprises a steering gear (61) and a cam (62) arranged at the movable end of the steering gear (61), the cam (62) ) can selectively disengage the first driven gear (31) or the second driven gear (41) from the driving gear (2) as the steering gear (61) rotates.
The 3D printing extrusion device according to claim 1, wherein the first feeding channel (12) and the second feeding channel (13) are provided with feeding limit protrusions (14) .
The 3D printing extrusion device according to any one of claims 1-7, characterized in that, further comprising a detection member (7) disposed at one end of the driving gear (2) away from the feeding member (1), The detection member (7) is provided with a first detection channel (71) and a second detection channel (72), and the first detection channel (71) is used for detecting the first driven gear (31) and the Whether material (100) enters between the driving gear (2), the second detection channel (72) is used to detect whether there is material between the second driven gear (41) and the driving gear (2) (100) ENTER.
The 3D printing extrusion device according to any one of claims 1-7, characterized in that it further comprises a material guide (8) disposed between the feeding member (1) and the driving gear (2) ), the material guide (8) is provided with a first material guide channel (81) and a second material guide channel (82), through the connection between the first driven gear (31) and the driving gear (2) The material (100) in between can enter the first feeding channel (12) through the first guiding channel (81); through the connection between the second driven gear (41) and the driving gear (2) The material (100) in between can enter the second supply channel (13) through the second material guide channel (82).
A 3D printer, characterized in that it comprises a mobile device and the 3D printing extrusion device according to any one of claims 1-9, which is arranged on a mobile end of the mobile device.