CN113478816A

CN113478816A - Silk dish device of FDM three-dimensional inkjet printer

Info

Publication number: CN113478816A
Application number: CN202110771364.XA
Authority: CN
Inventors: 李思文; 何福蓉; 李义孥; 陈平雄
Original assignee: Shandong Yiren Intelligent Manufacturing Technology Co ltd
Current assignee: Peng Feng
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-10-08
Anticipated expiration: 2041-07-08
Also published as: CN113478816B

Abstract

The invention provides a wire disc device of an FDM three-dimensional printer, which comprises a printing platform, wherein a portal frame is fixed at the top end of the printing platform, symmetrically arranged support frames are fixed on the upper surface of the portal frame, a wire disc support assembly is rotatably connected between the two support frames, a wire feeding disc is sleeved on the outer surface of the wire disc support assembly, a first check assembly is arranged at one end of the wire disc support assembly, and a second check assembly is arranged at the other end of the wire disc support assembly. According to the invention, through the matching of the bending stress of the lath and the first and second check assemblies, the elastic stress of the wire material can not drive the wire feeding disc to rotate when the wire material stops moving, so that the rotation of the wire feeding disc becomes stable and uniform.

Description

Silk dish device of FDM three-dimensional inkjet printer

Technical Field

The invention mainly relates to the technical field of 3D printing, in particular to a wire disc device of an FDM three-dimensional printer.

Background

The 3D printer is also called a three-dimensional printer, and is a cumulative manufacturing technology, i.e., a machine of a rapid prototyping technology, and a wire feeding device is one of the most important components in the three-dimensional printer.

According to the novel FDM3D printer wire feeding device provided by the patent document with the application number of CN201620850709.5, the wire feeding device comprises a bottom plate, a base is arranged on the bottom plate, a wire feeding roller is arranged on the base, the surface of the wire feeding roller is of an inward concave structure, friction patterns are arranged on the surface of the wire feeding roller, the wire feeding roller is connected with a stepping motor, a pressing bearing is arranged right above the wire feeding roller, the pressing bearing is arranged on a pressing frame, the left end of the pressing frame is hinged on a hinged support through a bolt, the hinged support is arranged at the upper end of the left side of the base, an inverted T-shaped sliding groove is arranged at the upper end of the right side of the base, a sliding block is arranged in the inverted T-shaped sliding groove, a screw rod is arranged on the sliding block, the upper part of the screw rod is connected with the right end of the pressing frame through a pressing adjusting nut, a pressing spring is arranged between the upper end of the right side of the base and the lower side of the right end of the pressing frame, a blocking piece is provided with a blocking piece, the lower end of the blocking piece is provided with a pressure sensor, the wire feeding device is novel in structure, the operation is stable, the wire feeding pressure adjustment can be realized, the wire feeding pressure adjustment device is suitable for different wire feeding pressure requirements, and the use requirements are met.

However, the above wire feeding device still has a defect, for example, although the above wire feeding device can achieve wire feeding pressure adjustment to meet different requirements of wire feeding pressure, the wire disk of the conventional wire feeding device is not driven or restrained by any mechanical device, so that the wire disk can rotate back and forth along with the elastic action of the wire in the wire feeding process, and the wire can be wound seriously, thereby reducing the working efficiency of the 3D printer.

Disclosure of Invention

The invention mainly provides a wire disc device of an FDM three-dimensional printer, which is used for solving the technical problems in the background technology.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a wire disc device of an FDM three-dimensional printer comprises a printing platform, wherein a portal frame is fixed at the top end of the printing platform, symmetrically arranged support frames are fixed on the upper surface of the portal frame, a wire disc support assembly is rotatably connected between the two support frames, a wire feeding disc is sleeved on the outer surface of the wire disc support assembly, a first check assembly is arranged at one end of the wire disc support assembly, and a second check assembly is arranged at the other end of the wire disc support assembly;

the wire disc supporting assembly comprises a rotating shaft and key rings, wherein two ends of the rotating shaft are rotatably connected with the supporting frame through bearings, the key rings are sleeved on the peripheries of two ends of the rotating shaft and are inserted into two ends of the interior of the wire feeding disc, the key rings are connected with the rotating shaft through a plurality of laths, and the plurality of laths on the same side are arranged around the rotating shaft;

the first stopping component comprises a first tooth locking mechanism sleeved on the key ring shell and a first pawl mechanism which is connected with the driving end of the first tooth locking mechanism and fixed on the shell of the supporting frame;

the second check assembly comprises a second ratchet mechanism which is sleeved on the shell of the key ring and has the same structure with the first ratchet mechanism, a second pawl mechanism which is fixed on the shell of the support frame, and a locking mechanism which is connected with the execution end of the second pawl mechanism and is fixed on the shell of the support frame.

Furthermore, the first locking tooth mechanism comprises a plurality of first ratchets fixed on the surface of the inner ring of the key ring and a plurality of second ratchets fixed on the surface of the outer ring of the key ring, so that the phenomenon that the wire on the wire feeding disc stops moving and drives the wire feeding disc to rotate due to the elastic stress of the wire feeding disc is reduced.

Furthermore, the first pawl mechanism comprises a first connecting rod which is rotatably connected with the shell of the support frame through a rotating shaft, a first pawl which is rotatably connected with one end of the first connecting rod through the rotating shaft and is abutted against the second ratchet, and a second pawl which is rotatably connected with the other end of the first connecting rod through the rotating shaft and is abutted against the first ratchet, and when the wire feeding disc rotates in the opposite direction, the first pawl and the second pawl limit the rotation of the wire feeding disc by clamping the second ratchet and the first ratchet.

Furthermore, the second pawl mechanism comprises a second connecting rod which is rotatably connected with the shell of the supporting frame through a rotating shaft, and the top end of the surface of one side, close to the key ring, of the second connecting rod is rotatably connected with a third pawl through the rotating shaft so as to limit the rotation of the key ring and prevent the key ring and a wire feeding disc on the key ring from driving the wire feeding disc to rotate due to the elastic stress of wires.

Furthermore, the locking mechanism comprises a plurality of third ratchets fixed on the outer surface of one end of the rotating shaft close to the second connecting rod and a fourth pawl which is abutted against the third ratchets and is rotationally connected with the shell of the supporting frame through the rotating shaft, so that the wire feeding disc is driven to rotate by the key ring due to the elastic stress of the wire material in a rapid balance manner.

Furthermore, the locking mechanism further comprises a rotating fork fixed on the upper surface of the fourth pawl, and a protruding block which is abutted against the top end of the rotating fork and fixed on the surface of one side, far away from the key ring, of the second connecting rod, and the rotating fork is fixed on the upper surface of the fourth pawl, so that the fourth pawl rotates in the direction opposite to the rotating direction of the second connecting rod.

Furthermore, the top of the rotating fork is provided with a groove for the lug to penetrate through, so that the lug further pushes the rotating fork to rotate by pushing the groove at the top end of the rotating fork.

Furthermore, a rubber pad is fixed on the inner wall of the groove body of the groove, so that the impact of the second connecting rod on the groove body is relieved by the groove through the rubber pad on the inner wall of the groove body, and the service life of the rotating fork is prolonged.

Furthermore, the rotating shaft penetrates through the supporting frame and extends to the outside, and one end of the rotating shaft is fixed with the angular speed sensor, so that the PLC can timely control a motor connected with the PLC and adjust the rotation of the wire feeding disc.

Furthermore, the driving end of the first pawl mechanism is connected with a power assembly, the power assembly comprises a motor fixed on the surface of one side, away from the wire feeding disc, of the support frame, a worm connected with an output shaft of the motor, and a worm wheel meshed with the worm and coaxially arranged with the first connecting rod, so that the first connecting rod sequentially pushes the second ratchet and the first ratchet to rotate through the first pawl and the second pawl on the first connecting rod, and the key ring is driven to rotate in a small range.

Compared with the prior art, the invention has the beneficial effects that:

firstly, the invention can ensure that the elastic stress of the wire material can not drive the wire feeding disc to rotate when the wire material stops moving through the bending stress of the lath, so that the rotation of the wire feeding disc becomes stable and uniform, and the invention specifically comprises the following steps: the shower nozzle of printer can be given the support frame and rotate a traction force of the silk material on the wire feeding dish of connecting, and this traction force is greater than the bending stress of lath in the wire feeding dish this moment, and the wire feeding dish just can rotate clockwise under the effect of traction force to the resilience force of lath adds the bending stress that the elastic stress of silk material is less than the lath simultaneously, makes the rotation of wire feeding dish become steadily even.

Secondly, the first lock tooth mechanism is fixed at one end of the key ring on the wire feeding disc, and the first pawl mechanism is fixed on the support frame, so that when the wire stops moving and the wire feeding disc is driven to rotate by elastic stress of the wire, the first ratchet and the second ratchet on the key ring are blocked by the first pawl and the second pawl in the first pawl mechanism in sequence, and the wire is difficult to rotate.

Thirdly, the second ratchet mechanism and the second pawl mechanism are fixed at the other end of the key ring, so that the third pawl clamps the second ratchet on the key ring, when the key ring cannot rotate forwards, the fourth pawl clamps the third ratchet on the key ring, so that the key ring cannot rotate backwards, and the key ring rapidly balances the wire feeding disc to drive the wire feeding disc to rotate due to the elastic stress of the wire.

The present invention will be explained in detail below with reference to the drawings and specific embodiments.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural diagram of a first stopping assembly according to the present invention;

FIG. 3 is a schematic structural view of a second check assembly of the present invention;

FIG. 4 is a schematic structural view of a second detent mechanism of the present invention;

FIG. 5 is an isometric view of the present invention;

FIG. 6 is an enlarged view of the structure in area A of FIG. 2;

FIG. 7 is an enlarged view of the structure of region A in FIG. 3;

fig. 8 is an enlarged view of the structure of region a in fig. 5.

In the figure: 10. a printing platform; 20. a gantry; 30. a support frame; 40. a wire reel support assembly; 41. a key ring; 42. a slat; 43. a rotating shaft; 44. an angular velocity sensor; 50. a wire feeding disc; 60. a first stopping assembly; 61. a first latch mechanism; 611. a second ratchet; 612. a first ratchet; 62. a first pawl mechanism; 621. a first link; 622. a first pawl; 623. a second pawl; 63. a power assembly; 631. a motor; 632. a worm; 633. a worm gear; 70. a second check assembly; 71. a locking mechanism; 711. a bump; 712. a rotating fork; 7121. a groove; 7122. a rubber pad; 713. a fourth pawl; 714. a third ratchet; 72. a second pawl mechanism; 721. a second link; 722. a third pawl; 73. a second ratchet mechanism.

Detailed Description

In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in different forms and not limited to the embodiments described herein, but which are provided so as to provide a more thorough and complete disclosure of the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may be present, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, as the terms "vertical", "horizontal", "left", "right" and the like are used herein for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the knowledge of the terms used herein in the specification of the present invention is for the purpose of describing particular embodiments and is not intended to limit the present invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In an embodiment, referring to fig. 1-4, a wire reel device of an FDM three-dimensional printer includes a printing platform 10, a gantry 20 is fixed at a top end of the printing platform 10, symmetrically arranged support frames 30 are fixed on an upper surface of the gantry 20, a wire reel support assembly 40 is rotatably connected between the two support frames 30, a wire feeding reel 50 is sleeved on an outer surface of the wire reel support assembly 40, a first check assembly 60 is arranged at one end of the wire reel support assembly 40, and a second check assembly 70 is arranged at the other end of the wire reel support assembly;

the wire reel supporting assembly 40 comprises a rotating shaft 43 with two ends rotatably connected with the supporting frame 30 through bearings, and key rings 41 sleeved on the peripheries of the two ends of the rotating shaft 43 and inserted into the two ends of the interior of the wire feeding reel 50, wherein the key rings 41 are connected with the rotating shaft 43 through a plurality of strips 42, and the plurality of strips 42 on the same side are arranged around the rotating shaft 43;

the first stopping element 60 comprises a first lock gear mechanism 61 sleeved on the casing of the key ring 41, and a first pawl mechanism 62 connected with the driving end of the first lock gear mechanism 61 and fixed on the casing of the supporting frame 30;

the second check assembly 70 includes a second ratchet mechanism 73 sleeved on the housing of the key ring 41 and having the same structure as the first ratchet mechanism 61, a second pawl mechanism 72 fixed on the housing of the supporting frame 30, and a locking mechanism 71 connected to an actuating end of the second pawl mechanism 72 and fixed on the housing of the supporting frame 30.

It should be noted that, in this embodiment, when the printer starts to work, the head of the printer will provide a traction force to the filament on the filament feeding disc 50 rotatably connected to the supporting frame 30, at this time, the traction force is greater than the bending stress of the slat 42 in the filament feeding disc 50, the filament feeding disc 50 will rotate clockwise under the action of the traction force, and simultaneously, the resilience force of the slat 42 plus the elastic stress of the filament is smaller than the bending stress of the slat 42, so that the elastic stress of the filament cannot drive the filament feeding disc 50 to rotate when the filament stops moving, and the rotation of the filament feeding disc 50 becomes smooth and uniform;

further, since the first lock tooth mechanism 61 is fixed at one end of the key ring 41 on the wire feeding plate 50 and the first pawl mechanism 62 is fixed on the support frame 30, when the wire stops moving and the elastic stress drives the wire feeding plate 50 to rotate, the first ratchet 612 and the second ratchet 611 on the key ring 41 are blocked by the first pawl 622 and the second pawl 623 in the first pawl mechanism 62, and are difficult to rotate;

furthermore, the second ratchet mechanism 73 and the second pawl mechanism 72 are fixed at the other end of the key ring 41, so that the third pawl 722 is clamped on the second ratchet 611 on the key ring 41, when the key ring 41 cannot rotate forward, the fourth pawl 713 is clamped on the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate backward, and the key ring 41 rapidly balances the wire feeding plate 50 and drives the wire feeding plate 50 to rotate due to the elastic stress of the wire.

Specifically, referring again to fig. 2 and 7, the first latch mechanism 61 includes a plurality of first ratchet teeth 612 fixed to an inner circumferential surface of the key ring 41, and a plurality of second ratchet teeth 611 fixed to an outer circumferential surface of the key ring 41, the first pawl mechanism 62 includes a first link 621 rotatably connected to a housing of the support frame 30 by a rotation shaft, a first pawl 622 rotatably connected to one end of the first link 621 by a rotation shaft and abutting against the second ratchet 611, and a second pawl 623 rotatably connected to the other end of the first link 621 via a rotating shaft and abutting against the first ratchet 612, the second click mechanism 72 includes a second link 721 rotatably connected to the housing of the supporting frame 30 by a rotating shaft, the top end of the second link 721 close to one side surface of the key ring 41 is rotatably connected with a third pawl 722 through a rotating shaft;

in the present embodiment, the second ratchet 611 on the outer surface and the first ratchet 612 on the inner surface of the key ring 41 cooperate with the first pawl mechanism 62 to limit the rotation direction thereof, so as to reduce the rotation of the feeding plate 50 caused by the elastic stress of the stop of the wire on the feeding plate 50;

further, when the printer is enabled to print and provide a drawing force to the filament on the filament feeding tray 50, the first link 621 of the supporting frame 30 is rotatably connected with the first pawl 622 and the second pawl 623 through the rotating shaft, and the first pawl 622 and the second pawl 623 are respectively abutted against the second ratchet 611 and the first ratchet 612, so that the first pawl 622 and the second pawl 623 are respectively used for limiting the rotating direction of the second ratchet 611 and the first ratchet 612, when the filament feeding tray 50 feeds the filament, the second ratchet 611 and the first ratchet 612 on the key ring 41 of the filament feeding tray 50 continuously slide over the first pawl 622 and the second pawl 623, and when the filament feeding tray 50 rotates in the opposite direction, the first pawl 622 and the second pawl 623 limit the rotation of the filament feeding tray 50 by clamping the second ratchet 611 and the first ratchet 612;

further, the second connecting rod 721 on the supporting frame 30 passes through the second ratchet 611 on the key ring 41 on which the third pawl 722 reversely rotates to limit the rotation of the key ring 41, and prevent the key ring 41 and the wire feeding plate 50 thereon from rotating due to the elastic stress of the wire.

Specifically, please refer to fig. 3, 4 and 8 again, the locking mechanism 71 includes a plurality of third ratchets 714 fixed on the outer surface of the rotating shaft 43 near one end of the second link 721, and a fourth pawl 713 abutting against the third ratchets 714 and rotatably connected to the housing of the supporting frame 30 through a rotating shaft, the locking mechanism 71 further includes a rotating fork 712 fixed on the upper surface of the fourth pawl 713, and a protrusion 711 abutting against the top end of the rotating fork 712 and fixed on the surface of the second link 721 far from the key ring 41, the top end of the rotating fork 712 is provided with a groove 7121 for the protrusion 711 to penetrate, and a rubber pad 7122 is fixed on the inner wall of the groove 7121;

in this embodiment, when the fourth pawl 713 is rotated to abut against the third ratchet 714 on the rotating shaft 43, the third ratchet 714 and the second ratchet 611 face opposite directions, so that when the third pawl 722 catches the second ratchet 611 on the key ring 41, and the key ring 41 cannot rotate forward, the fourth pawl 713 catches the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate backward, and the wire feeding plate 50 is driven to rotate by the elastic stress of the wire material by the rapidly balanced wire feeding plate 50;

further, when the second link 721 drives the key ring 41 to rotate due to the elastic stress of the wire material of the key ring 41, the second link 721 drives the protrusion 711 fixed thereon to perform angular displacement, since the protrusion 711 abuts against the top end of the rotating fork 712, and the rotating fork 712 is fixed on the upper surface of the fourth pawl 713, so that the fourth pawl 713 performs rotation in the direction opposite to the rotation direction of the second link 721;

further, the projection 711 further pushes the rotary fork 712 to rotate by pushing the groove 7121 at the top end of the rotary fork 712;

the impact of the second connecting rod 721 on the groove 7121 is relieved by the rubber pad 7122 on the inner wall of the groove body, and the service life of the rotating fork 712 is prolonged.

Specifically, referring to fig. 1, 5 and 6 again, an angular velocity sensor 44 is fixed to one end of the rotating shaft 43 extending to the outside through the supporting frame 30, a driving end of the first click mechanism 62 is connected to the power assembly 63, the power assembly 63 includes a motor 631 fixed to a side surface of the supporting frame 30 away from the wire feeding disc 50, a worm 632 connected to an output shaft of the motor 631, and a worm wheel 633 engaged with the worm 632 and coaxially disposed with the first connecting rod 621;

in the present embodiment, the PLC controller senses the angular displacement of the rotating shaft 43 through the connected angular velocity sensor 44 of the BMG160, so that the PLC controller controls the connected motor 631 in time to adjust the rotation of the wire feeding disc 50;

further, when the output shaft of the motor 631 drives the worm 632 to rotate, the worm 632 is engaged with the worm wheel 633, and the worm wheel 633 is coaxially disposed with the first link 621, so as to drive the first link 621 to swing, so that the first link 621 sequentially pushes the second ratchet 611 and the first ratchet 612 to rotate through the first pawl 622 and the second pawl 623 on the first link 621, so as to drive the key ring 41 to rotate by a small amount.

The specific operation mode of the invention is as follows:

when the printer starts to work, the spray head of the printer can provide traction force for the wires on the wire feeding disc 50 which is rotatably connected with the support frame 30, at the moment, the traction force is greater than the bending stress of the battens 42 in the wire feeding disc 50, the wire feeding disc 50 can rotate clockwise under the action of the traction force, and simultaneously, the resilience force of the battens 42 and the elastic stress of the wires are less than the bending stress of the battens 42, so that the elastic stress of the wires can not drive the wire feeding disc 50 to rotate when the wires stop moving, and the rotation of the wire feeding disc 50 becomes stable and uniform;

because the first lock tooth mechanism 61 is fixed at one end of the key ring 41 on the wire feeding disc 50, and the first pawl mechanism 62 is fixed on the support frame 30, when the wire feeding disc 50 is driven to rotate by the elastic stress of the wire when the wire stops moving, the first ratchet 612 and the second ratchet 611 on the key ring 41 are blocked by the first pawl 622 and the second pawl 623 in the first pawl mechanism 62 in sequence, so that the wire is difficult to rotate;

because the second ratchet mechanism 73 and the second pawl mechanism 72 are fixed at the other end of the key ring 41, the third pawl 722 is clamped on the second ratchet 611 on the key ring 41, so that when the key ring 41 cannot rotate forwards, the fourth pawl 713 is clamped on the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate backwards, and the key ring 41 can rapidly balance the wire feeding disc 50 and drive the wire feeding disc 50 to rotate due to the elastic stress of the wire.

The invention is described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the above-described embodiments, and it is within the scope of the invention to adopt such insubstantial modifications of the inventive method concept and solution, or to apply the inventive concept and solution directly to other applications without modification.

Claims

1. The wire reel device of the FDM three-dimensional printer comprises a printing platform (10), and is characterized in that a portal frame (20) is fixed at the top end of the printing platform (10), symmetrically arranged support frames (30) are fixed on the upper surface of the portal frame (20), a wire reel support assembly (40) is rotatably connected between the two support frames (30), a wire feeding reel (50) is sleeved on the outer surface of the wire reel support assembly (40), a first check assembly (60) is arranged at one end of the wire reel support assembly (40), and a second check assembly (70) is arranged at the other end of the wire reel support assembly;

the wire disc supporting assembly (40) comprises a rotating shaft (43) and key rings (41), wherein two ends of the rotating shaft (43) are rotatably connected with the supporting frame (30) through bearings, the key rings (41) are sleeved on the outer peripheries of two ends of the rotating shaft (43) and are inserted into two ends of the inner part of the wire feeding disc (50), the key rings (41) are connected with the rotating shaft (43) through a plurality of laths (42), and the plurality of laths (42) on the same side are arranged around the rotating shaft (43);

the first return component (60) comprises a first lock gear mechanism (61) sleeved on the shell of the key ring (41) and a first pawl mechanism (62) which is connected with the driving end of the first lock gear mechanism (61) and fixed on the shell of the support frame (30);

the second check assembly (70) comprises a second ratchet mechanism (73) which is sleeved on the shell of the key ring (41) and has the same structure with the first ratchet mechanism (61), a second pawl mechanism (72) which is fixed on the shell of the support frame (30), and a locking mechanism (71) which is connected with the execution end of the second pawl mechanism (72) and is fixed on the shell of the support frame (30).

2. The filament tray device of an FDM three-dimensional printer according to claim 1, wherein the first latch mechanism (61) comprises a plurality of first ratchet teeth (612) fixed to an inner ring surface of the key ring (41) and a plurality of second ratchet teeth (611) fixed to an outer ring surface of the key ring (41).

3. The filament reel device of an FDM three-dimensional printer according to claim 2, wherein the first pawl mechanism (62) comprises a first link (621) rotatably connected to the housing of the support frame (30) via a rotating shaft, a first pawl (622) rotatably connected to one end of the first link (621) via the rotating shaft and abutting against the second ratchet (611), and a second pawl (623) rotatably connected to the other end of the first link (621) via the rotating shaft and abutting against the first ratchet (612).

4. The filament tray device of an FDM three-dimensional printer according to claim 1, wherein the second pawl mechanism (72) comprises a second link (721) rotatably connected to the housing of the support frame (30) through a rotating shaft, and a third pawl (722) is rotatably connected to a top end of the second link (721) near one side surface of the key ring (41) through a rotating shaft.

5. The filament reel device of an FDM three-dimensional printer according to claim 4, wherein the locking mechanism (71) comprises a plurality of third ratchet teeth (714) fixed on an outer surface of one end of the rotating shaft (43) near the second link (721), and a fourth pawl (713) abutting against the third ratchet teeth (714) and rotatably connected with the housing of the supporting frame (30) through a rotating shaft.

6. The filament reel device of an FDM three-dimensional printer according to claim 5, wherein said lock mechanism (71) further comprises a rotary fork (712) fixed to an upper surface of said fourth pawl (713), and a projection (711) abutting against a tip end of said rotary fork (712) and fixed to a side surface of said second link (721) away from said key ring (41).

7. The silk plate device of the FDM three-dimensional printer according to claim 6, wherein the top end of the rotating fork (712) is provided with a groove (7121) for the protrusion (711) to penetrate through.

8. The filament tray device of an FDM three-dimensional printer according to claim 7, wherein the inner wall of the groove (7121) is fixed with a rubber pad (7122).

9. The filament tray device of an FDM three-dimensional printer according to claim 1, wherein the rotating shaft (43) extends through the support frame (30) to an external end where an angular velocity sensor (44) is fixed.

10. The yarn tray device of an FDM three-dimensional printer according to claim 3, wherein the driving end of the first click mechanism (62) is connected with a power assembly (63), the power assembly (63) comprises a motor (631) fixed on one side surface of the support frame (30) far away from the yarn feeding tray (50), a worm (632) connected with an output shaft of the motor (631), and a worm wheel (633) engaged with the worm (632) and coaxially arranged with the first connecting rod (621).