CN113478816B

CN113478816B - Silk dish device of FDM three-dimensional printer

Info

Publication number: CN113478816B
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: 2023-05-12
Anticipated expiration: 2041-07-08
Also published as: CN113478816A

Abstract

The invention provides a wire tray 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 supporting frames are fixed on the upper surface of the portal frame, a wire tray supporting assembly is rotationally connected between the two supporting frames, a wire feeding tray is sleeved on the outer surface of the wire tray supporting assembly, a first return component is arranged at one end of the wire tray supporting assembly, and a second return component is arranged at the other end of the wire tray supporting assembly. According to the invention, through the cooperation of the bending stress of the batten, the first return component and the second return component, the elastic stress of the wire rod can not drive the wire feeding disc to rotate when the wire rod stops moving, so that the rotation of the wire feeding disc becomes stable and uniform.

Description

Silk dish device of FDM three-dimensional printer

Technical Field

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

Background

The 3D printer is also called a three-dimensional printer, is a machine for accumulating manufacturing technology, namely rapid prototyping technology, and the wire feeder is one of the most important components in the three-dimensional printer.

According to the novel FDM3D printer wire feed device that patent document of application number CN201620850709.5 provided, this wire feed device includes the bottom plate, be equipped with the base on the bottom plate, be equipped with the wire feed gyro wheel on the base, the wire feed gyro wheel surface is indent structure, the wire feed gyro wheel surface is equipped with friction decorative pattern, step motor is connected to the wire feed gyro wheel, be equipped with the hold-down bearing directly over the wire feed gyro wheel, hold-down bearing installs on the clamp frame, the clamp frame left end passes through the bolt to be articulated on the hinge support, the hinge support is put in base left side upper end, base right side upper end is equipped with the T shape spout that falls, be equipped with the screw rod on the slider, the screw rod top is equipped with the clamp frame right-hand member through compressing tightly adjusting nut connection, be equipped with the separation blade below the compression spring, the separation blade lower extreme is equipped with pressure sensor, this wire feed device novel structure, the operation is stable, can realize wire feed pressure adjustment, the different material silk feeding pressure requirements of adaptation, the operation requirement has been satisfied.

However, the above wire feeder still has drawbacks, for example, although the above wire feeder can realize wire feeding pressure adjustment and adapt to different wire feeding pressure requirements, the wire tray of the conventional wire feeder is not driven or held by any mechanical device, so that the wire tray can rotate back and forth along with the elastic action of the wire in the wire feeding process, and the wire can be wound when serious, thereby reducing the working efficiency of the starved 3D printer.

Disclosure of Invention

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

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

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

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

the first return component comprises a first locking tooth mechanism sleeved on the key ring shell and a first pawl mechanism connected with the driving end of the first locking tooth mechanism and fixed on the shell of the support frame;

the second return component comprises a second ratchet mechanism which is sleeved on the shell of the key ring and has the same structure as the first locking tooth 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.

Further, the first tooth locking mechanism comprises a plurality of first ratchets fixed on the inner ring surface of the key ring and a plurality of second ratchets fixed on the outer ring surface of the key ring, so that the wire stop motion on the wire feeding disc is reduced, and the wire feeding disc is driven to rotate due to elastic stress of the wire stop motion.

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

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

Further, the locking mechanism comprises a plurality of third ratchets which are fixed on the outer surface of the rotating shaft close to one end of the second connecting rod, and a fourth pawl which is abutted to the third ratchets and is rotationally connected with the shell of the supporting frame through the rotating shaft, so that the key ring can quickly balance the wire feeding disc to drive the wire feeding disc to rotate due to elastic stress of wires.

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

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

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

Further, the rotating shaft penetrates through the supporting frame and extends to one end of the outside, an angular velocity sensor is fixed at the end of the rotating shaft, so that the PLC controller timely controls a motor connected with the rotating shaft, and rotation of the wire feeding disc is adjusted.

Further, the drive end of the first pawl mechanism is connected with the power assembly, the power assembly comprises a motor fixed on the surface of one side of the support frame far away from the wire feeding disc, 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 a first pawl and a second pawl on the first connecting rod, and the key ring is driven to rotate in a small amplitude.

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

firstly, the elastic stress of the wire rod can not drive the wire feeding disc to rotate when the wire rod stops moving through the bending stress of the plate strip, so that the rotation of the wire feeding disc becomes stable and uniform, and the method specifically comprises the following steps: the nozzle of the printer can give a traction force to the wires on the wire feeding disc which is rotationally connected on the supporting frame, at the moment, the traction force is larger than the bending stress of the battens in the wire feeding disc, the wire feeding disc can rotate clockwise under the action of the traction force, and meanwhile, the resilience force of the battens and the elastic stress of the wires are smaller than the bending stress of the battens, so that the rotation of the wire feeding disc becomes stable and uniform.

And secondly, because one end of the key ring on the wire feeding disc is fixedly provided with the first tooth locking mechanism, and the supporting frame is fixedly provided with the first pawl mechanism, when the wire stops moving, the elastic stress drives the wire feeding disc to rotate, and 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, so that the wire is difficult to rotate.

And 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, and when the key ring cannot rotate positively, the fourth pawl clamps the third ratchet on the key ring, so that the key ring cannot rotate reversely, and the key ring can quickly balance the elastic stress of the wire to drive the wire feeding disc to rotate.

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

Drawings

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

FIG. 2 is a schematic view of a first check assembly according to the present invention;

FIG. 3 is a schematic view of a second stop assembly according to the present invention;

FIG. 4 is a schematic 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 area A structure of FIG. 2;

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

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

In the figure: 10. a printing platform; 20. a portal frame; 30. a support frame; 40. a wire tray support assembly; 41. a key ring; 42. a slat; 43. a rotation shaft; 44. an angular velocity sensor; 50. wire feeding disc; 60. a first backstop assembly; 61. a first tooth locking mechanism; 611. a second ratchet; 612. a first ratchet; 62. a first detent 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 wheel; 70. a second backstop assembly; 71. a locking mechanism; 711. a bump; 712. rotating the fork; 7121. a groove; 7122. a rubber pad; 713. a fourth pawl; 714. a third ratchet; 72. a second detent mechanism; 721. a second link; 722. a third pawl; 73. a second ratchet mechanism.

Detailed Description

In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.

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

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

Referring to fig. 1-4, a wire tray device of an FDM three-dimensional printer includes a printing platform 10, a portal frame 20 is fixed at the top end of the printing platform 10, symmetrically arranged supporting frames 30 are fixed on the upper surface of the portal frame 20, a wire tray supporting assembly 40 is rotatably connected between the two supporting frames 30, a wire feeding tray 50 is sleeved on the outer surface of the wire tray supporting assembly 40, a first return component 60 is arranged at one end of the wire tray supporting assembly 40, and a second return component 70 is arranged at the other end of the wire tray supporting assembly 40;

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

the first return assembly 60 comprises a first locking tooth mechanism 61 sleeved on the shell of the key ring 41, and a first pawl mechanism 62 connected with the driving end of the first locking tooth mechanism 61 and fixed on the shell of the support frame 30;

the second return assembly 70 includes a second ratchet mechanism 73 that is sleeved on the housing of the key ring 41 and has the same structure as the first locking tooth mechanism 61, a second pawl mechanism 72 that is fixed on the housing of the support 30, and a locking mechanism 71 that is connected to the actuating end of the second pawl mechanism 72 and is fixed on the housing of the support 30.

It should be noted that, in this embodiment, when the printer starts to work, the nozzle of the printer will give the wire on the wire feeding tray 50 rotatably connected to the support frame 30 a traction force, and this traction force is greater than the bending stress of the batten 42 in the wire feeding tray 50, the wire feeding tray 50 will rotate clockwise under the action of the traction force, and meanwhile, the elastic stress of the elastic stress plus the batten 42 is smaller than the bending stress of the batten 42, so when the wire stops moving, the elastic stress cannot drive the wire feeding tray 50 to rotate, so that the rotation of the wire feeding tray 50 becomes stable and uniform;

further, since the first locking 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 supporting frame 30, when the elastic stress of the wire stops moving to drive the wire feeding disc 50 to rotate, the first ratchet teeth 612 and the second ratchet teeth 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, and are difficult to rotate;

further, since the second ratchet mechanism 73 and the second pawl mechanism 72 are fixed at the other end of the key ring 41, when the third pawl 722 is engaged with the second ratchet 611 on the key ring 41, and the key ring 41 cannot rotate forward, the fourth pawl 713 is engaged with the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate reversely, and the wire feeding disc 50 is driven to rotate by the elastic stress of the wire material in the wire feeding disc 50.

Specifically, please refer again to fig. 2 and 7, the first tooth locking mechanism 61 includes a plurality of first ratchet teeth 612 fixed on the inner ring surface of the key ring 41, and a plurality of second ratchet teeth 611 fixed on the outer ring surface of the key ring 41, the first pawl mechanism 62 includes a first link 621 rotatably connected to the housing of the support frame 30 through a rotation shaft, a first pawl 622 rotatably connected to one end of the first link 621 through a rotation shaft and abutting against the second ratchet teeth 611, and a second pawl 623 rotatably connected to the other end of the first link 621 through a rotation shaft and abutting against the first ratchet teeth 612, the second pawl mechanism 72 includes a second link 721 rotatably connected to the housing of the support frame 30 through a rotation shaft, and a third pawl 722 is rotatably connected to the top end of the second link 721 near one side surface of the key ring 41 through a rotation shaft;

it should be noted that, in the present embodiment, the key ring 41 is made to cooperate with the first pawl mechanism 62 to limit the rotation direction of the key ring by the second ratchet teeth 611 on the outer surface and the first ratchet teeth 612 on the inner surface, so as to reduce the stop motion of the wire on the wire feeding disc 50, and the wire feeding disc 50 is driven to rotate due to the elastic stress thereof;

further, when the printer prints and feeds the wire on the wire feeding tray 50 with a traction force, since the first link 621 on the support 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, the rotation directions of the second ratchet 611 and the first ratchet 612 are respectively limited by the first pawl 622 and the second pawl 623, so that when the wire feeding tray 50 feeds the wire, the second ratchet 611 and the first ratchet 612 on the key ring 41 of the wire feeding tray 50 continuously slide over the first pawl 622 and the second pawl 623, and when the wire feeding tray 50 rotates in opposite directions, the first pawl 622 and the second pawl 623 clamp the second ratchet 611 and the first ratchet 612, and the rotation of the wire feeding tray 50 is limited;

further, the second link 721 on the supporting frame 30 is made to pass through the second ratchet 611 on the key ring 41 with the third pawl 722 turned back to limit the rotation of the key ring 41, so as to prevent the key ring 41 and the wire feeding tray 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 ratchet teeth 714 fixed on an outer surface of the rotating shaft 43 near one end of the second connecting rod 721, and a fourth pawl 713 that is abutted against the third ratchet teeth 714 and is rotationally connected with the housing of the supporting frame 30 through a rotating shaft, the locking mechanism 71 further includes a rotating fork 712 fixed on an upper surface of the fourth pawl 713, and a protruding block 711 abutted against a top end of the rotating fork 712 and fixed on a surface of the second connecting rod 721 far away from the key ring 41, a groove 7121 for inserting the protruding block 711 is provided at a top end of the rotating fork 712, and a rubber pad 7122 is fixed on an inner wall of the groove 7121;

in the present embodiment, when the fourth pawl 713 rotates to abut against the third ratchet 714 on the rotating shaft 43, the third ratchet 714 is opposite to the second ratchet 611, so that the third pawl 722 blocks the second ratchet 611 on the key ring 41, and when the key ring 41 cannot rotate forward, the fourth pawl 713 blocks the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate reversely, and the wire feeding disc 50 is driven to rotate by the elastic stress of the wire material in the wire feeding disc 50;

further, when the second link 721 drives the key ring 41 to rotate due to the elastic stress of the wire rod and the key ring 41 is driven by the second link 721 to perform angular displacement, the bump 711 is abutted 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 opposite to the rotation direction of the second link 721;

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

so that the groove 7121 slows down the impact of the second connecting rod 721 to the groove through the rubber pad 7122 on the inner wall of the groove body, and the service life of the rotary fork 712 is prolonged.

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

in this embodiment, the PLC controller is caused to sense the angular displacement of the rotating shaft 43 by the angular velocity sensor 44 connected to the PLC controller and having the BMG160 model, so that the PLC controller can timely control the motor 631 connected to the PLC controller 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 meshed 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 thereon, so as to drive the key ring 41 to rotate by a small margin.

The specific operation mode of the invention is as follows:

when the printer starts to work, the spray head of the printer gives a traction force to the wire on the wire feeding disc 50 rotationally connected to the support frame 30, at the moment, the traction force is larger than the bending stress of the batten 42 in the wire feeding disc 50, the wire feeding disc 50 rotates clockwise under the action of the traction force, and meanwhile, the resilience force of the batten 42 plus the elastic stress of the wire are smaller than the bending stress of the batten 42, so that when the wire stops moving, the elastic stress cannot drive the wire feeding disc 50 to rotate, and the rotation of the wire feeding disc 50 becomes stable and uniform;

since the first locking 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 supporting frame 30, when the elastic stress of the wire stops moving to drive the wire feeding disc 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 in sequence and are difficult to rotate;

since the second ratchet mechanism 73 and the second pawl mechanism 72 are fixed at the other end of the key ring 41, when the third pawl 722 is engaged with the second ratchet 611 on the key ring 41, and the key ring 41 cannot rotate in the forward direction, the fourth pawl 713 is engaged with the third ratchet 714 on the key ring 41, so that the key ring 41 cannot rotate in the reverse direction, and the wire feeding disc 50 is driven to rotate by the wire feeding disc 50 due to elastic stress of the wire material in a rapid balance manner.

While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the embodiments described above, but is intended to be within the scope of the invention, as long as such insubstantial modifications are made by the method concepts and technical solutions of the invention, or the concepts and technical solutions of the invention are applied directly to other occasions without any modifications.

Claims

1. The wire tray 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 supporting frames (30) are fixed on the upper surface of the portal frame (20), a wire tray supporting component (40) is rotationally connected between the two supporting frames (30), a wire feeding tray (50) is sleeved on the outer surface of the wire tray supporting component (40), a first return component (60) is arranged at one end of the wire tray supporting component (40), and a second return component (70) is arranged at the other end of the wire tray supporting component;

the wire tray 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 inside of the wire feeding tray (50), wherein the key rings (41) are connected with the rotating shaft (43) through a plurality of battens (42), and a plurality of battens (42) on the same side are arranged around the rotating shaft (43);

the first return assembly (60) comprises a first locking tooth mechanism (61) sleeved on the shell of the key ring (41), and a first pawl mechanism (62) connected with the driving end of the first locking tooth mechanism (61) and fixed on the shell of the support frame (30);

the second return assembly (70) comprises a second ratchet mechanism (73) sleeved on the shell of the key ring (41) and having the same structure as the first locking tooth mechanism (61), a second pawl mechanism (72) fixed on the shell of the support frame (30), and a locking mechanism (71) connected with the execution end of the second pawl mechanism (72) and fixed on the shell of the support frame (30);

the second pawl mechanism (72) comprises a second connecting rod (721) rotatably connected with the shell of the support frame (30) through a rotating shaft, and the top end of one side surface, close to the key ring (41), of the second connecting rod (721) is rotatably connected with a third pawl (722) through the rotating shaft;

the locking mechanism (71) comprises a plurality of third ratchets (714) which are fixed on the outer surface of the rotating shaft (43) close to one end of the second connecting rod (721), and a fourth pawl (713) which is abutted with the third ratchets (714) and is rotatably connected with the shell of the supporting frame (30) through the rotating shaft.

2. The wire tray device of an FDM three-dimensional printer according to claim 1, wherein the first tooth locking mechanism (61) includes 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 wire tray device of an FDM three-dimensional printer according to claim 2, wherein 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 the rotation shaft and abutted to the second ratchet (611), and a second pawl (623) rotatably connected to the other end of the first link (621) by the rotation shaft and abutted to the first ratchet (612).

4. A wire tray device of an FDM three-dimensional printer according to claim 3, wherein the locking mechanism (71) further comprises a rotating fork (712) fixed to an upper surface of the fourth pawl (713), and a projection (711) abutted against a tip of the rotating fork (712) and fixed to a side surface of the second link (721) remote from the key ring (41).

5. The wire tray device of the FDM three-dimensional printer according to claim 4, wherein a groove (7121) through which the bump (711) is inserted is provided at a top end of the rotating fork (712).

6. The wire tray device of the FDM three-dimensional printer according to claim 5, wherein a rubber pad (7122) is fixed on the inner wall of the groove (7121).

7. The wire tray device of the FDM three-dimensional printer according to claim 1, wherein an angular velocity sensor (44) is fixed to one end of the rotating shaft (43) extending to the outside through the supporting frame (30).

8. A wire tray device of an FDM three-dimensional printer according to claim 3, wherein the driving end of the first pawl mechanism (62) is connected to a power unit (63), the power unit (63) includes a motor (631) fixed to a side surface of the support frame (30) remote from the wire feeding tray (50), a worm (632) connected to an output shaft of the motor (631), and a worm wheel (633) meshed with the worm (632) and coaxially disposed with the first link (621).