A 3D printer material changing mechanism, a 3D printer and a working method

Abstract

The application discloses a 3D printer material changing mechanism, a 3D printer and a working method, wherein the 3D printer material changing mechanism comprises a first driving device, a feeding mechanism, a feeding driven assembly, a material selecting mechanism, a first transmission assembly, a feeding linkage mechanism, a second driving device and a consumable roll mechanism, and the components, the devices and the mechanisms are connected according to a set connection relationship; wherein the feeding driven assembly is provided with a plurality of groups, and the feeding mechanism and each group of the feeding driven assembly can be arranged with consumables, so that a plurality of types of consumables can be selected for printing; through the 3D printer material changing mechanism, the desired consumables can be selected and delivered to the nozzle for printing. The 3D printer material changing mechanism can flexibly change and select consumables for printing, and can meet the diversified printing needs of people. The application can be used for printing multi-color consumables by a single-nozzle 3D printer, or for printing consumables of different materials by a single-nozzle 3D printer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of 3D printing, and particularly relates to a 3D printer material changing mechanism, a 3D printer and a working method. BACKGROUND

[0002] Today, the 3D printing forming technology presents a pattern of a hundred flowers blooming and a hundred schools of thought contending. The 3D printer is widely applied in various industries, various trades and various fields. The FDM (fused deposition modeling) forming technology is not only applied in industrial production, but also appears in daily learning and life. A large number of 3D printer enthusiasts emerge in daily learning and life, and the desktop FDM forming technology 3D printer is highly praised by the printer enthusiasts. The desktop FDM forming technology 3D printer can excellently complete the printing of a part model, and has a good printing performance for a complex model and a hand-made product. With more and more printing enthusiasts, the printing demand of people is also more and more rich, and the demand for "printing a model of multiple colors" or "combining multiple colors of consumables to print a model" or "combining multiple different materials of consumables to print a model" is more and more. The ordinary single-color 3D printer or double-color printer cannot meet the printing demand. At present, there is a lack of a reliable and durable 3D printer material changing mechanism to flexibly change and select consumables for printing and meet the diversified printing demand of people. At present, there is a lack of a 3D printer with a new type of 3D printer material changing mechanism to facilitate people to print a model. At present, there is a lack of a working method of the 3D printer material changing mechanism to scientifically guide people to use the new type of 3D printer material changing mechanism.

[0003] Therefore, a new technology is needed to solve the problem of lacking a new type of 3D printer material changing mechanism in the prior art, a new technology is needed to solve the problem of lacking "a 3D printer with a new type of 3D printer material changing mechanism" in the prior art, and a new technology is needed to solve the problem of lacking "a working method of the new type of 3D printer material changing mechanism" in the prior art. SUMMARY

[0004] To solve the above problems in the prior art, the application provides a reliable and durable 3D printer material changing mechanism which can flexibly change and select consumables for printing and meet the diversified printing demand of people.

[0005] The application adopts the following technical scheme:

[0006] A 3D printer material changing mechanism, comprising a first driving device, a feeding mechanism, a feeding driven assembly, a material selecting mechanism, a first transmission assembly, a feeding linkage mechanism, a second driving device and a consumable roll mechanism.

[0007] The first driving device is connected with the first set position of the feeding mechanism, and is used for driving the feeding mechanism to rotate;

[0008] The second set position of the feeding mechanism is connected with the feeding linkage mechanism through the first transmission assembly;

[0009] The second driving device is connected with the material selecting mechanism, and is used for driving the material selecting mechanism to move;

[0010] The feeding driven assemblies are provided in groups, and the feeding driven assemblies in the groups are respectively arranged beside the feeding mechanism and the material selecting mechanism;

[0011] After the material selecting mechanism acts, the feeding driven assembly at the set position can be driven to move close to the feeding mechanism, so as to clamp the consumable; meanwhile, the feeding driven assembly can connect the feeding linkage mechanism with the consumable roll mechanism;

[0012] The consumable roll mechanism is connected with the consumable roll transmission; the consumable roll is used for carrying the consumable; after the consumable is drawn out from the consumable roll, the consumable can be initially arranged between the feeding mechanism and the feeding driven assemblies; the consumable is clamped and conveyed by the feeding mechanism and the feeding driven assemblies at the set position.

[0013] Further, the first driving device, the feeding mechanism, the feeding driven assemblies, the material selecting mechanism, the feeding linkage mechanism, the second driving device and the consumable roll mechanism are arranged at the set positions of the shell.

[0014] Further, the feeding mechanism comprises a first rotating shaft, feeding wheels and first bearings; the feeding wheels are provided in a plurality of groups, and the feeding wheels in the groups are arranged on the first rotating shaft at a set interval; the first end of the first rotating shaft is connected with the first driving device; the second end of the first rotating shaft is connected with the feeding linkage mechanism through the first transmission assembly; the first rotating shaft is arranged at the set position of the shell through the first bearings.

[0015] Further, each group of the feeding driven assemblies comprises a consumable passage, an elastically deformable member, a lever bracket, a feeding driven wheel and a transmission wheel; the feeding driven wheel is arranged at the first set position of the lever bracket; the transmission wheel is arranged at the second set position of the lever bracket; the lever bracket is rotatably arranged on the consumable passage through the elastically deformable member; the consumable passage has a feeding passage for the consumable; the consumable passage can be arranged on the shell, and after being arranged, the feeding driven wheel and the feeding wheel maintain a set adjustable clamping and conveying gap.

[0016] Further, each of the feeding driven assemblies is further provided with a detection device for detecting whether the consumable passes through the feeding wheel or the feeding channel.

[0017] Further, the material selecting mechanism comprises a movable abutting assembly and a position adjusting assembly; the movable abutting assembly is movably arranged on the position adjusting assembly; the position adjusting assembly is connected with the second driving device and can be driven by the second driving device, thereby driving the movable abutting assembly to displace along a guiding direction; after the movable abutting assembly is displaced, the movable abutting assembly can abut against the rocker support at a set position, thereby reducing the clamping gap for clamping the consumable by the feeding driven wheel.

[0018] Further, the feeding linkage mechanism comprises a second rotating shaft and linkage wheels; the linkage wheels are provided in plurality; the plurality of linkage wheels are arranged on the second rotating shaft at a set interval; the second rotating shaft is rotatably arranged at a set position of the housing; the second end of the first rotating shaft is connected with one end of the second rotating shaft through the first transmission assembly;

[0019] The consumable roll mechanism comprises a third rotating shaft and rolls; the rolls are provided in plurality; the plurality of rolls are rotatably arranged on the third rotating shaft at a set interval; the third rotating shaft is arranged at a set position of the housing; the rolls can be connected with the transmission part of the consumable roll;

[0020] The linkage wheels are in transmission connection with the rolls through the transmission wheels, thereby driving the consumable roll to rotate.

[0021] Another object of the present application is to provide a 3D printer to facilitate people to print models and meet the diversified printing needs of people.

[0022] A 3D printer comprises a nozzle, a branched converging channel, a consumable roll and the 3D printer material changing mechanism; the branched converging channel comprises a main channel and a plurality of branched channels; one end of each of the plurality of branched channels is in communication with the feeding channel of the consumable channel piece of the feeding driven assembly at a set position, and the other end of each of the plurality of branched channels is in communication with the main channel; the front end of the main channel is in communication with the printing channel of the nozzle; the consumable on the consumable roll can be guided into the feeding channel of the consumable channel piece of the feeding driven assembly.

[0023] Further, the 3D printer further comprises a control device; the first driving device and the second driving device are respectively connected with the control device.

[0024] Another object of the present application is to provide a working method of the 3D printer material changing mechanism, to scientifically guide people to use the new 3D printer material changing mechanism.

[0025] A working method of the 3D printer material changing mechanism, based on the 3D printer material changing mechanism, characterized in that the working method is one or more of the following: a first working method, a second working method, a third working method, and a fourth working method.

[0026] The first working method is a working method in a state without feeding instruction, which includes the following working steps:

[0027] SA1, in the state without feeding instruction, the movable abutting component of the material selecting mechanism stops at a set initial position, and at the initial position, the movable abutting component is away from the feeding driven component;

[0028] The second working method is a working method in a state with feeding instruction, which includes the following working steps:

[0029] SB1, in the state with feeding instruction, the control device of the 3D printer sends a feeding instruction, the second driving device is started to drive the movable abutting component on the material selecting mechanism to move to the corresponding feeding driven component selected by the instruction, the movable abutting component abuts against the lever support of the feeding driven component, the feeding driven wheel of the feeding driven component approaches the feeding wheel of the feeding mechanism, the clamping gap becomes smaller, and then the consumable between the feeding driven wheel and the feeding wheel is clamped;

[0030] SB2, after the state that the movable abutting component accurately abuts against the lever support is confirmed, the second driving device stops moving, and the first driving device is started to drive the first rotating shaft and the feeding wheel of the feeding mechanism to rotate, and then the consumable is transported under the action of the feeding wheel and the feeding driven wheel;

[0031] The third working method is a working method in a state with material changing instruction, which includes the following working steps:

[0032] SC1, in the state with material changing instruction, the second driving device is switched from the closed state to the started state to drive the movable abutting component on the material selecting mechanism to move to the next group of feeding driven components to abut against the lever support of the feeding driven component, so that the consumable between the feeding driven wheel and the feeding wheel is clamped;

[0033] SC2. After the state of the movable contact component accurately pressing against the rocker arm bracket is confirmed, the second drive device stops moving, while the first drive device starts, driving the first rotating shaft and the feeding wheel of the feeding mechanism to rotate, and then the consumables are conveyed under the action of the feeding wheel and the feeding driven wheel.

[0034] The fourth working method is a working method in the state of "all printing instructions have ended", which includes the following working steps:

[0035] SD1. When all printing commands have ended, the first drive device drives the first rotating shaft and feeding wheel of the feeding mechanism to rotate, and then the last printed consumable is returned to the set position and shut off. The second drive device drives the movable abutment component on the material selection mechanism to stop at the initial position.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] This invention discloses a 3D printer material changing mechanism that allows for flexible material selection, meeting diverse printing needs. This invention can be used in single-nozzle 3D printers to print multi-color materials or multiple materials of different types. The feeding follower assembly of this invention comprises several groups, allowing users to place materials between the feeding mechanism and each group of feeding follower assemblies. This enables the 3D printer material changing mechanism to simultaneously accommodate multiple materials (such as materials of different colors or materials). Through this 3D printer material changing mechanism, users can select the desired material from a variety of options and have it delivered to the nozzle for printing. Specifically, this invention uses a material selection mechanism to press against a pre-positioned feeding follower assembly, thereby clamping the target material. Then, the feeding mechanism, in conjunction with the feeding follower assembly, conveys the material. Simultaneously, a feeding linkage mechanism, through the feeding follower assembly and the material roll mechanism, rotates, causing the material roll to rotate with the feeding mechanism, thus achieving efficient material delivery, such as material feeding or unloading.

[0038] The present invention discloses a 3D printer with a novel material changing mechanism, which can facilitate the printing of models of different styles and meet people's diverse printing needs.

[0039] The present invention provides a working method for a 3D printer material changing mechanism, which can scientifically guide people in using the new 3D printer material changing mechanism and help improve the service life and safety of the new 3D printer material changing mechanism. Attached Figure Description

[0040] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0041] Figure 1 This is a schematic diagram showing the arrangement of the filament changing mechanism and the filament roll in a 3D printer. Figure 1 (The shell cover is not shown);

[0042] Figure 2 yes Figure 1 A 3D diagram showing the consumable rolls and outer boxes after removal;

[0043] Figure 3 yes Figure 2 The diagram shows the positions and connections of the "first drive device, feeding mechanism, feeding driven component, material selection mechanism, first transmission component, feeding linkage mechanism, second drive device, and consumable roller mechanism".

[0044] Figure 4 yes Figure 3 A magnified view of the area at point B;

[0045] Figure 5 yes Figure 3 A three-dimensional diagram from another perspective;

[0046] Figure 6 yes Figure 3 A three-dimensional schematic diagram of the central feeding mechanism;

[0047] Figure 7 yes Figure 3 A three-dimensional schematic diagram (also a schematic diagram of the connection relationship) of the first drive device, the feeding mechanism and the feeding linkage mechanism;

[0048] Figure 8 yes Figure 3 A three-dimensional schematic diagram of the central feeding mechanism and a set of feeding driven components;

[0049] Figure 9 yes Figure 8 A three-dimensional diagram from another perspective;

[0050] Figure 10 yes Figure 9 A magnified view of the area at point C;

[0051] Figure 11 yes Figure 3 A three-dimensional schematic diagram of the material selection mechanism;

[0052] Figure 12 The movable contact component has not yet pressed against the rocker arm bracket. (Diagram showing the positional relationship between the feeding driven wheel, transmission wheel, and other components.) Figure 12 (This can represent the relationship between the main components of the 3D printer's material changing mechanism in the non-feeding state);

[0053] Figure 13 yes Figure 12 Diagram showing the positional relationship between the movable contact assembly, the rocker arm support, the feeding driven wheel, the transmission wheel, and other components.Figure 13 The connection relationship between the main components of the 3D printer material changing mechanism in the feeding state can be represented.

[0054] Reference signs:

[0055] 1-3D printer material changing mechanism; 11-first driving device; 12-feeding mechanism; 13-feeding driven assembly; 14-material selecting mechanism; 15-first transmission assembly; 16-feeding linkage mechanism; 17-second driving device; 18-consumable roll mechanism; 19-consumable roll; 20-consumable; 21-housing; 22-transmission part; 23-first rotating shaft; 24-feeding wheel; 25-first bearing; 26-first motor; 27-second transmission assembly; 28-consumable passage; 29-elastic deformation part; 30-tilting rod support; 31-feeding driven wheel; 32-transmission wheel; 33-feeding passage; 34-clamping and feeding gap; 35-first rotating shaft; 36-second rotating shaft; 37-third rotating shaft; 38-torsional spring; 39-detecting device; 40-consumable leading-out connecting part; 41-movable abutting assembly; 42-position adjusting assembly; A-leading direction; 43-second motor; 44-third transmission assembly; 45-sliding part; 46-abutting part; 47-screw; 48-optical axis; 49-first through hole; 50-second through hole; 51-second bearing; 52-bearing; 53-protruding part; 54-second rotating shaft; 55-linkage wheel; 56-third rotating shaft; 57-roll; 58-fourth bearing; 59-first synchronous wheel; 60-first annular synchronous belt; 61-second synchronous wheel; 62-third synchronous wheel; 63-second annular synchronous belt; 64-fourth synchronous wheel; 65-fifth synchronous wheel; 66-third annular synchronous belt; 67-sixth synchronous wheel; 68-outer box; 69-inner box; 70-feeding hole; B-local enlarged view reference sign; C-local enlarged view reference sign. DETAILED DESCRIPTION

[0056] The concept, specific structure and generated technical effects of the present application will be described clearly and completely in combination with the embodiments and the drawings below, so as to fully understand the purpose, scheme and effects of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The same reference signs used in the drawings indicate the same or similar parts.

[0057] It should be noted that, unless otherwise specified, when a certain feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right and the like used in the present application are only relative to the mutual position relationship of the components of the present application in the drawings.

[0058] Reference Figures 1 to 13A 3D printer material changing mechanism 1 includes a first drive device 11, a feeding mechanism 12, a feeding driven component 13, a material selection mechanism 14, a first transmission component 15, a feeding linkage mechanism 16, a second drive device 17, and a consumable roll mechanism 18.

[0059] The first driving device 11 is connected to the first set position of the feeding mechanism 12 and is used to drive the feeding mechanism 12 to rotate;

[0060] The second set position of the feeding mechanism 12 is connected to the feeding linkage mechanism 16 through the first transmission component 15;

[0061] The second driving device 17 is connected to the material selection mechanism 14 and is used to drive the material selection mechanism 14 to move;

[0062] The feeding follower assembly 13 is provided in several groups, which can be used to cooperate with the material selection mechanism 14 to select the consumable 20; the several groups of the feeding follower assembly 13 are respectively arranged next to the feeding mechanism 12 and the material selection mechanism 14;

[0063] After the material selection mechanism 14 is activated, it can act on the feeding driven component 13 at a set position, driving the feeding driven component 13 to approach the feeding mechanism 12 for clamping the consumable 20; wherein, while the feeding driven component 13 is approaching the feeding mechanism 12, it can drive the feeding linkage mechanism 16 to the consumable rolling roller mechanism 18.

[0064] The consumable roll mechanism 18 is connected to the consumable roll 19 for transmission; wherein, the consumable roll 19 is used to carry the consumable 20; after the consumable 20 is led out from the consumable roll 19, it can be initially positioned between the feeding mechanism 12 and several sets of feeding driven components 13; the consumable 20 is clamped and conveyed in a timely manner by the feeding mechanism 12 and the feeding driven components 13 at the set position, and finally the consumable 20 is conveyed forward into the nozzle of the 3D printer.

[0065] Reference Figures 1 to 13 In one embodiment, the 3D printer material changing mechanism 1 further includes a housing 21; the first drive device 11, the feeding mechanism 12, the feeding follower component 13, the material selection mechanism 14, the feeding linkage mechanism 16, the second drive device 17, and the consumable roll mechanism 18 are respectively disposed at a set position on the housing 21.

[0066] In one embodiment, the 3D printer material changing mechanism 1 further includes a cover ( Figure 1 (Not shown); the cover can be placed on the housing 21 to protect the structure installed in the housing 21, such as the consumable roll 19 and other structures.

[0067] ReferenceFigures 1 to 13 In one embodiment, the feeding mechanism 12 comprises a first rotating shaft 23, a plurality of feeding wheels 24, and a plurality of first bearings 25; the plurality of feeding wheels 24 are arranged on the first rotating shaft 23 at a certain interval; the first end of the first rotating shaft 23 is connected with the first driving device 11; the second end of the first rotating shaft 23 is connected with the feeding linkage mechanism 16 through the first transmission assembly 15; the first rotating shaft 23 is arranged on the housing 21 at a certain position through the plurality of first bearings 25. The feeding wheels 24 rotate with the first rotating shaft 23, and can drive the clamped consumables 20 to advance or retreat; the feeding wheels 24 are provided with at least two.

[0068] In one embodiment, the feeding wheels 24 are metal wheels with small teeth or lines, or the feeding wheels 24 are plastic wheels with small teeth or lines; the feeding wheels 24 have shaft holes, and the feeding wheels 24 are matched with the first rotating shaft 23 through the shaft holes. In another embodiment, the feeding wheels 24 are cylindrical cams which are integrally machined with the first rotating shaft 23, and the cylindrical cams are coaxial with the first rotating shaft 23.

[0069] Referring to Figures 1 to 13 In one embodiment, the first driving device 11 comprises a first motor 26 and a second transmission assembly 27, and the output shaft of the first motor 26 is connected with the first rotating shaft 23 through the second transmission assembly 27. The first driving device 11 can improve the power of feeding or retreat.

[0070] Referring to Figures 1 to 13 In one embodiment, each feeding driven assembly 13 comprises a consumable passage 28, an elastically deformable member 29, a lever bracket 30, a feeding driven wheel 31, and a transmission wheel 32; the feeding driven wheel 31 is arranged at a first certain position of the lever bracket 30; the transmission wheel 32 is arranged at a second certain position of the lever bracket 30; the lever bracket 30 is rotatably arranged on the consumable passage 28 through the elastically deformable member 29; the consumable passage 28 has a feeding passage 33 for the consumables 20 to pass through; the consumable passage 28 can be arranged on the housing 21, and after being arranged, the feeding driven wheel 31 and the feeding wheel 24 maintain a certain adjustable pinch gap 34. The initial pinch gap 34 is relatively large, and is greater than the diameter of the consumables 20, so that the consumables 20 passing through the initial pinch gap 34 will not be clamped, and thus the consumables 20 will not be fed or retreated.

[0071] In one embodiment, the elastic deformation member 29 is one of a torsion spring, a compression spring, and a tension spring. The presence of the elastic deformation member 29 allows the lever bracket 30 to return to the initial position after losing the pressing effect of the movable abutting assembly 41 of the selection mechanism 14, so that the initial pinch gap 34 between the feed driven wheel 31 and the feed wheel 24 is restored. Referring to Figures 1 to 13 In this embodiment, the elastic deformation member 29 is a torsion spring 38. The lever bracket 30 is rotatably arranged on the consumable passage member 28 by the torsion spring 38.

[0072] Referring to Figures 1 to 13 In one embodiment, each of the feed driven assemblies 13 further comprises a first rotating shaft 35, a second rotating shaft 36, and a third rotating shaft 37. The first rotating shaft 35 connects the lever bracket 30 and the torsion spring 38. The lever bracket 30 is rotatably and returnably arranged on the consumable passage member 28 by the first rotating shaft 35 and the torsion spring 38. The two legs of the torsion spring 38 maintain a set opening angle. One leg is connected to the consumable passage member 28, and the other leg is connected to the lever bracket 30. The feed driven wheel 31 is rotatably arranged on the lever bracket 30 by the second rotating shaft 36. The transmission wheel 32 is rotatably arranged on the lever bracket 30 by the third rotating shaft 37. The lever bracket 30 can be flexibly tilted by the torsion spring 38. Therefore, in a timely manner, when the feed driven wheel 31 approaches the feed wheel 24, the transmission wheel 32 can also approach the linkage wheel 55 of the feed linkage mechanism 16 and the roller 57 of the consumable roller mechanism 18. Therefore, in a timely manner, when the feed driven wheel 31 moves away from the feed wheel 24, the transmission wheel 32 can also move away from the linkage wheel 55 of the feed linkage mechanism 16 and the roller 57 of the consumable roller mechanism 18. The linkage wheel 55 is in transmission connection with the roller 57 of the consumable roller mechanism 18 through the transmission wheel 32 in a timely manner, thereby driving the consumable roll 19 to rotate and achieving the release or recovery of the consumable 20 by the consumable roll 19.

[0073] In one embodiment, the feed driven assembly 13 is used to clamp the selected consumable 20 between the feed driven wheel 31 and the feed wheel 24 after the selected consumable 20 is selected. With the driving of the first driving device 11, the feed wheel 24 rotates, and finally the consumable 20 is forwarded to the nozzle of the 3D printer.

[0074] Referring to Figures 1 to 13 In one embodiment, each of the feed driven assemblies 13 is further provided with a detection device 39. The detection device 39 is arranged on the consumable passage member 28 and is used to detect whether the consumable 20 passes through the feed wheel 24 or the feed passage 33.

[0075] In one embodiment, the detecting device 39 is one of an optical coupling switch, a displacement sensor, a micro switch, and a Hall sensor. Refer to Figures 1 to 13 In this embodiment, the detecting device 39 is an optical coupling switch.

[0076] Refer to Figures 1 to 13 In one embodiment, each of the feeding follower assemblies 13 further comprises a consumable leading connector 40; the consumable leading connector 40 is arranged on the consumable passage member 28, and the consumable leading connector 40 is in communication with the feeding passage 33; the consumable leading connector 40 is capable of being in communication with a branch passage of a 3D printer (the branch passage is mentioned below).

[0077] Refer to Figures 1 to 13 In one embodiment, the material selecting mechanism 14 comprises a movable abutting assembly 41 and a position adjusting assembly 42; the movable abutting assembly 41 is movably arranged on the position adjusting assembly 42; the position adjusting assembly 42 is connected with the second driving device 17 and is capable of being driven by the second driving device 17, thereby capable of driving the movable abutting assembly 41 to displace along the guiding direction A; wherein, after the movable abutting assembly 41 moves, it is capable of abutting against the rocker bracket 30 at a set position, thereby reducing the pinch gap 34, for clamping the consumable 20 by the feeding follower wheel 31. The movable abutting assembly 41 in combination with the feeding follower assembly 13 at the set position can select the consumable to be printed.

[0078] Refer to Figures 1 to 13 In one embodiment, the second driving device 17 comprises a second motor 43 and a third transmission assembly 44; the output shaft of the second motor 43 is connected with the position adjusting assembly 42 through the third transmission assembly 44.

[0079] Refer to Figures 1 to 13 In this embodiment, the movable abutting assembly 41 comprises a sliding member 45 and an abutting member 46; the position adjusting assembly 42 comprises a lead screw 47 and a light shaft 48; the abutting member 46 is arranged on the sliding member 45 and is used for abutting against the rocker bracket 30; the sliding member 45 has a first through hole 49 and a second through hole 50; the first through hole 49 is in sliding connection (such as threaded connection) with the lead screw 47; the second through hole 50 is connected (such as smooth connection) with the light shaft 48.

[0080] Refer to Figures 1 to 13 In this embodiment, the position adjusting assembly 42 further comprises a second bearing 51; the lead screw 47 is rotatably fixed on a set position of the housing 21 through the second bearing 51; the light shaft 48 is (directly) fixed on a set position of the housing 21.

[0081] In another embodiment, the movable abutting assembly comprises a sliding block and an abutting block; the abutting block is arranged on the sliding block, and the abutting block is used to abut against the lever support; the position adjusting assembly comprises a sliding block guide rail and a conveying belt; the sliding block is arranged on the sliding block guide rail and the conveying belt; the second driving device drives the conveying belt to move, so as to drive the sliding block to displace along the guide direction of the sliding block guide rail, thereby realizing that the abutting block abuts against the lever support at the set position.

[0082] The transmission mode for driving the movable abutting assembly of the present application includes but is not limited to a lead screw transmission or a "sliding block guide rail + conveying belt" transmission.

[0083] Referring to Figures 1 to 13 In one embodiment, the abutting member 46 can be a bearing 52 or an arc-shaped protrusion on the sliding member 45. Correspondingly, in order to better enable the lever support 30 to receive the abutting pressure of the abutting member 46, a convex part 53 is arranged at a corresponding position on the lever support 30.

[0084] In one embodiment, the movable abutting assembly 41 moves to abut against the convex part 53 of the lever support 30, which can be accurately controlled by the control program of the 3D printer, so as to accurately control the operation of the second driving device 17 (such as a stepping motor), accurately control the rotation of the lead screw 47, accurately control the moving distance of the sliding member 45 on the lead screw 47, and accurately control the stopping position of the sliding member 45. In another embodiment, the movable abutting assembly 41 moves to abut against the convex part 53 of the lever support 30, which is realized by using the detection function of the sensor switch to accurately stop the sliding member 45. For example, when the sliding member 45 moves to abut against the target convex part 53, the sensor switch generates detection information, and feeds back the detection information to the control device of the 3D printer ("control device" is mentioned below). After judgment and analysis, the control device accurately stops the operation of the second driving device 17 to accurately stop the sliding member 45 at the target position; wherein the sensor switch and the control device are connected by wire or wirelessly.

[0085] Referring to Figures 1 to 13 In one embodiment, the feeding linkage mechanism 16 comprises a second rotating shaft 54 and linkage wheels 55; the linkage wheels 55 are provided in plurality; the plurality of linkage wheels 55 are arranged on the second rotating shaft 54 at a set interval, and the linkage wheels 55 rotate together with the second rotating shaft 54; the second rotating shaft 54 is rotatably arranged at a set position of the housing 21; and the second end of the first rotating shaft 23 is connected with one end of the second rotating shaft 54 through the first transmission assembly 15.

[0086] The consumable roll mechanism 18 comprises a third rotating shaft 56 and a plurality of roll rollers 57; the plurality of roll rollers 57 are rotatably arranged on the third rotating shaft 56 at a set interval; the third rotating shaft 56 is arranged at a set position of the housing 21; the roll rollers 57 are connectable with the transmission part 22 of the consumable roll 19;

[0087] The linkage wheel 55 is in transmission connection with the roll rollers 57 through the transmission wheel 32 in time, thereby driving the consumable roll 19 to rotate.

[0088] In an embodiment, the feeding linkage mechanism 16 further comprises a plurality of third bearings; the plurality of third bearings are arranged on the second rotating shaft 54 at a set interval; the second rotating shaft 54 is rotatably fixed at a set position of the housing 21 through the plurality of third bearings;

[0089] Referring to Figures 1 to 13 In an embodiment, the consumable roll mechanism 18 further comprises a plurality of fourth bearings 58; the plurality of fourth bearings 58 are arranged on the third rotating shaft 56 at a set interval; the third rotating shaft 56 is fixed at a set position of the housing 21 through the plurality of fourth bearings 58 (wherein the third rotating shaft 56 is fixed on the housing 1 and does not rotate by itself, while the roll rollers 57 can rotate on the third rotating shaft 56).

[0090] In an embodiment, the first transmission assembly 15 is one of a synchronous wheel belt assembly, a shaft coupling assembly, and a gear assembly; the second transmission assembly 27 is one of a synchronous wheel belt assembly, a shaft coupling assembly, and a gear assembly; the third transmission assembly 44 is one of a synchronous wheel belt assembly, a shaft coupling assembly, and a gear assembly.

[0091] Referring to Figures 1 to 13 In the embodiment, the first transmission assembly 15 is a synchronous wheel belt assembly, which comprises a first synchronous wheel 59, a first annular synchronous belt 60, and a second synchronous wheel 61; the first synchronous wheel 59 is arranged at the second end of the first rotating shaft 23; the second synchronous wheel 61 is arranged at one end of the second rotating shaft 54; the first annular synchronous belt 60 connects the first synchronous wheel 59 and the second synchronous wheel 61. Wherein the number of teeth of the second synchronous wheel 61 is different from that of the first synchronous wheel 59, and the number of teeth of the second synchronous wheel 61 is greater than that of the first synchronous wheel 59, which is designed to realize transmission deceleration. The first transmission assembly 15 can drive the second rotating shaft 54 and the linkage wheel 55 to rotate, thereby driving the roll rollers 57 to rotate through the transmission wheel 32, and thereby driving the consumable roll 19 to rotate through the roll rollers 57, so as to realize the release or recovery of the consumable roll 19.

[0092] Referring toFigures 1 to 13 In the embodiment, the second transmission assembly 27 is a synchronous wheel belt assembly, which comprises a third synchronous wheel 62, a second annular synchronous belt 63 and a fourth synchronous wheel 64; the third synchronous wheel 62 is arranged on the output shaft of the first motor 26; the fourth synchronous wheel 64 is arranged on the first end of the first rotating shaft 23; and the second annular synchronous belt 63 connects the third synchronous wheel 62 and the fourth synchronous wheel 64.

[0093] With reference to Figures 1 to 13 In the embodiment, the third transmission assembly 44 is a synchronous wheel belt assembly, which comprises a fifth synchronous wheel 65, a third annular synchronous belt 66 and a sixth synchronous wheel 67; the fifth synchronous wheel 65 is arranged on the output shaft of the second motor 43; the sixth synchronous wheel 67 is arranged on one end of the screw rod 47; and the third annular synchronous belt 66 connects the fifth synchronous wheel 65 and the sixth synchronous wheel 67.

[0094] Another purpose of the present application is to provide a 3D printer to facilitate people to print models and meet the diversified printing needs of people.

[0095] With reference to Figure 1 A 3D printer comprises a nozzle, a branch converging channel, a consumable roll 19 and the 3D printer material changing mechanism 1; the branch converging channel comprises a main channel and a plurality of branch channels; one end of each of the branch channels is in communication with the feed channel 33 of the consumable channel piece 28 of the feed driven assembly 13 at a designated position, and the other end of each of the branch channels is in communication with the main channel; the front end of the main channel is in communication with the printing channel of the nozzle; and the consumable 20 on the consumable roll 19 can be introduced into the feed channel 33 of the consumable channel piece 28 of the feed driven assembly 13. In one embodiment, the consumable 20 is a consumable filament with a circular cross section.

[0096] In one embodiment, the branch converging channel is a five-way pipe.

[0097] With reference to Figures 1 to 13 In one embodiment, a plurality of consumable rolls 19 are provided; each of the consumable rolls 19 carries a consumable 20; each of the consumable rolls 19 is rotatably arranged in the housing 21; each of the transmission parts 22 of the consumable rolls 19 is connected to the corresponding roll 57; and different colors or materials of the consumables 20 can be carried by the corresponding consumable rolls 19 according to actual needs.

[0098] In one embodiment, the 3D printer further comprises a control device (such as a controller); the first driving device 11, the second driving device 17, the detection device 39, and the sensor switch are respectively connected with the control device. The control device can issue control instructions.

[0099] Referring to Figures 1 to 13 In one embodiment, the shell 21 comprises an outer box 68 and an inner box 69, the outer box 68 is mounted on the inner box 69; the first driving device 11, the feeding mechanism 12, the feeding driven assembly 13, the material selecting mechanism 14, the feeding linkage mechanism 16, the second driving device 17, the consumable roll mechanism 18, the consumable roll 19, and the control device are respectively arranged at the set positions of the inner box 69; the outer box 68 is provided with a plurality of feeding holes 70; the plurality of feeding holes 70 correspond to the pinch gap 34 respectively; the consumable 20 on the consumable roll 19 is guided into the pinch gap 34 and the feeding channel 33 through the feeding holes 70. The detection device 39 on the consumable channel 28 can detect whether the consumable 20 passes through the feeding wheel 24 or the feeding channel 33, for judging whether the consumable 20 at each position is ready or not; if the detection device 39 detects that the consumable 20 is ready, corresponding feeding or feeding reversing actions can be performed; if the detection device 39 cannot detect that the consumable 20 passes through the feeding wheel 24 or the feeding channel 33, a signal is fed back to the control device, so that the first driving device 11 does not work or pauses the current work, so that the first rotating shaft 23 and the feeding wheel 24 of the feeding mechanism 12 do not rotate, and at the same time, the linkage wheel 55, the transmission wheel 32, the roll 57, and the corresponding transmission part 22 also do not rotate.

[0100] Another purpose of the present application is to provide a working method of the 3D printer feeding mechanism, to scientifically guide people to use the novel 3D printer feeding mechanism.

[0101] Referring to ​ A working method of the 3D printer feeding mechanism, based on the 3D printer feeding mechanism 1, characterized in that the working method is one or more of the following: a first working method, a second working method, a third working method, and a fourth working method.

[0102] The first working method is a working method in a state without feeding instruction, which comprises the following working steps:

[0103] SA1, in the state without feeding instruction, the movable abutting assembly 41 of the material selecting mechanism 14 stops at a set initial position, at the initial position, the movable abutting assembly 41 is away from the feeding driven assembly 13;

[0104] The second working method is a working method in a feeding instruction state, and the method comprises the following working steps:

[0105] SB1, in the feeding instruction state, the control device of the 3D printer sends a feeding instruction, the second driving device 17 is started to drive the movable abutting assembly 41 on the material selecting mechanism 14 to move to the corresponding feeding driven assembly 13 selected by the instruction, the movable abutting assembly 41 abuts against the rocker bracket 30 of the feeding driven assembly 13, so that the feeding driven wheel 31 of the feeding driven assembly 13 approaches the feeding wheel 24 of the feeding mechanism 12, so that the pinch gap 34 is reduced, and then the consumable 20 between the feeding driven wheel 31 and the feeding wheel 24 is clamped;

[0106] SB2, after the state that the movable abutting assembly 41 accurately abuts against the rocker bracket 30 is confirmed, the second driving device 17 stops moving, and the first driving device 11 starts to drive the first rotating shaft 23 and the feeding wheel 24 of the feeding mechanism 12 to rotate, and then the consumable 20 is transported (can be fed or retreated) under the action of the feeding wheel 24 and the feeding driven wheel 31;

[0107] The third working method is a working method in a material changing instruction state, and the method comprises the following working steps:

[0108] SC1, after the current printing is completed, another consumable is to be printed, in the material changing instruction state, the second driving device 17 is switched from the closed state to the started state to drive the movable abutting assembly 41 on the material selecting mechanism 14 to move to the next group of feeding driven assemblies 13 to abut against the rocker bracket 30 of the feeding driven assembly 13, so that the consumable 20 between the feeding driven wheel 31 and the feeding wheel 24 is clamped;

[0109] SC2, after the state that the movable abutting assembly 41 accurately abuts against the rocker bracket 30 is confirmed, the second driving device 17 stops moving, and the first driving device 11 starts to drive the first rotating shaft 23 and the feeding wheel 24 of the feeding mechanism 12 to rotate, and then the consumable 20 is transported (can be fed or retreated) under the action of the feeding wheel 24 and the feeding driven wheel 31;

[0110] The fourth working method is a working method in a state that all printing instructions are completed, and the method comprises the following working steps:

[0111] In the state that all the printing instructions are finished, the first driving device 11 drives the first rotating shaft 23 and the feeding wheel 24 of the feeding mechanism 12 to rotate, and after the last printed consumable 20 is returned to the set position, the first driving device 11 is closed, and the second driving device 17 drives the movable abutting component 41 on the material selecting mechanism 14 to stop at the initial position.

[0112] When the working method of the 3D printer material changing mechanism is one of the first working method, the second working method, the third working method and the fourth working method, the 3D printer material changing mechanism executes one of the working methods.

[0113] When the working method of the 3D printer material changing mechanism is one of the first working method, the second working method, the third working method and the fourth working method, the 3D printer material changing mechanism executes one of the working methods.

[0114] The other contents of the 3D printer material changing mechanism, the 3D printer and the working method of the present application can refer to the prior art, which will not be repeated here.

[0115] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any modification, equivalent change and modification of the above embodiment according to the technical essence of the present application, which does not deviate from the technical solution content of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A 3D printer material exchange mechanism, characterized in that, The first driving device, the feeding mechanism, the feeding driven assembly, the material selecting mechanism, the first transmission assembly, the feeding linkage mechanism, the second driving device, and the consumable roll mechanism are arranged on the housing. The first driving device is connected with the first setting position of the feeding mechanism, and is used to drive the feeding mechanism to rotate. The second setting position of the feeding mechanism is connected with the feeding linkage mechanism through the first transmission assembly. The second driving device is connected with the material selecting mechanism, and is used to drive the material selecting mechanism to move. The feeding driven assembly is provided with a plurality of groups, and the plurality of groups of the feeding driven assembly are arranged beside the feeding mechanism and the material selecting mechanism. The consumable roll mechanism is connected with the consumable roll transmission. The consumable roll is used to carry the consumable. After the consumable is drawn out from the consumable roll, the consumable can be initially arranged between the feeding mechanism and the plurality of groups of the feeding driven assembly. The consumable is clamped and conveyed by the feeding mechanism and the feeding driven assembly at the setting position in time. The first driving device, the feeding mechanism, the feeding driven assembly, the material selecting mechanism, the feeding linkage mechanism, the second driving device, and the consumable roll mechanism are arranged on the housing. The feeding mechanism comprises a first rotating shaft, a plurality of feeding wheels, and a first bearing. The plurality of feeding wheels are arranged on the first rotating shaft at a set interval. The first end of the first rotating shaft is connected with the first driving device. The second end of the first rotating shaft is connected with the feeding linkage mechanism through the first transmission assembly. The first rotating shaft is arranged on the housing at a set position through the plurality of first bearings. Each group of the feeding driven assembly comprises a consumable passage, an elastically deformable member, a lever bracket, a feeding driven wheel, and a transmission wheel. The feeding driven wheel is arranged at the first setting position of the lever bracket. The transmission wheel is arranged at the second setting position of the lever bracket. The lever bracket is rotatably arranged on the consumable passage through the elastically deformable member. The consumable passage has a feeding channel for the consumable. The consumable passage can be arranged on the housing. After being arranged, the feeding driven wheel and the feeding wheel maintain a set adjustable clamping and conveying gap. After the material selecting mechanism acts, the feeding driven assembly at the setting position is driven to move close to the feeding mechanism, so as to clamp the consumable. When the feeding driven assembly moves close to the feeding mechanism, the feeding linkage mechanism and the consumable roll mechanism are connected through the transmission wheel. The first driving device comprises a first motor and a second transmission assembly. The output shaft of the first motor is connected with the first rotating shaft through the second transmission assembly.

2. The 3D printer material exchange mechanism of claim 1, wherein, Each group of the feeding driven assembly is further provided with a detection device. The detection device is used to detect whether the consumable passes through the feeding wheel or the feeding channel.

3. The 3D printer material exchange mechanism of claim 2, wherein, The material selecting mechanism comprises a movable abutting assembly and a position adjusting assembly; the movable abutting assembly is movably arranged on the position adjusting assembly; the position adjusting assembly is connected with the second driving device and can be driven by the second driving device, thereby driving the movable abutting assembly to displace along a guide direction; after the movable abutting assembly moves, it can abut against the rocker support at a set position to reduce the pinch gap for clamping the consumable by the feed driven wheel.

4. The 3D printer material exchange mechanism of claim 3, wherein, The feed linkage mechanism comprises a second rotating shaft and linkage wheels; the linkage wheels are provided in plurality; the linkage wheels are arranged on the second rotating shaft at a set interval; the second rotating shaft is rotatably arranged at a set position of the housing; the second end of the first rotating shaft is connected with one end of the second rotating shaft through the first transmission assembly; The consumable roll mechanism comprises a third rotating shaft and roll rollers; the roll rollers are provided in plurality; the roll rollers are rotatably arranged on the third rotating shaft at a set interval; the third rotating shaft is arranged at a set position of the housing; the roll rollers can be connected with the transmission part of the consumable roll; The linkage wheels are in transmission connection with the roll rollers through the transmission wheels, thereby driving the consumable roll to rotate.

5. A 3D printer characterized by, The 3D printer comprises a nozzle, a branched and converged channel, a consumable roll and the material changing mechanism of any one of claims 1 to 4; the branched and converged channel comprises a main channel and branched channels in plurality; one end of each of the branched channels is in communication with the feed channel of the consumable channel piece of the feed driven assembly at a set position, and the other end of each of the branched channels is in communication with the main channel; the front end of the main channel is in communication with the printing channel of the nozzle; the consumable on the consumable roll can be guided into the feed channel of the consumable channel piece of the feed driven assembly.

6. The 3D printer of claim 5, wherein, The 3D printer further comprises a control device; the first driving device and the second driving device are connected with the control device respectively.

7. A method of operating a 3D printer material exchange mechanism according to claim 3, characterized in that, The working method comprises a first working method, a second working method, a third working method and a fourth working method; The first working method is a working method in a state without feed instruction, which comprises the following working steps: SA1, in the state without feed instruction, the movable abutting assembly of the material selecting mechanism is stopped at a set initial position, and the movable abutting assembly is away from the feed driven assembly at the initial position; The second working method is a working method in a state with feed instruction, which comprises the following working steps: SB1, in the state with feed instruction, the control device of the 3D printer sends a feed instruction, the second driving device is started to drive the movable abutting assembly on the material selecting mechanism to move to the corresponding feed driven assembly selected by the instruction, the movable abutting assembly abuts against the rocker support of the feed driven assembly, the feed driven wheel of the feed driven assembly is close to the feed wheel of the feed mechanism, the pinch gap is reduced, and the consumable between the feed driven wheel and the feed wheel is clamped. SB2, after the state that the movable abutting assembly accurately abuts against the lever support is confirmed, the second driving device stops moving, and the first driving device starts to start, drives the first rotating shaft and the feeding wheel of the feeding mechanism to rotate, and then the consumables are transported under the action of the feeding wheel and the feeding driven wheel; The third working method is a working method in a "material replacement instruction state", and the method comprises the following working steps: SC1, in the material replacement instruction state, the second driving device is switched from the closed state to the starting state, drives the movable abutting assembly on the material selection mechanism to move to the next group of feeding driven assemblies, abuts against the lever support of the feeding driven assembly, and makes the consumables between the feeding driven wheel and the feeding wheel be clamped; SC2, after the state that the movable abutting assembly accurately abuts against the lever support is confirmed, the second driving device stops moving, and the first driving device starts to start, drives the first rotating shaft and the feeding wheel of the feeding mechanism to rotate, and then the consumables are transported under the action of the feeding wheel and the feeding driven wheel; The fourth working method is a working method in a "state that all printing instructions are ended", and the method comprises the following working steps: SD1, in the state that all printing instructions are ended, the first driving device drives the first rotating shaft and the feeding wheel of the feeding mechanism to rotate, retreats the last printed consumables to the set position, and then closes, and the second driving device drives the movable abutting assembly on the material selection mechanism to stop at the initial position.

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