3D printing device and cutter trigger apparatus

Abstract

Provided in the present application are a 3D printing device and a cutter trigger apparatus. A frame of the 3D printing device comprises a rear edge portion and side edge portions connected to two ends of the rear edge portion, a driving motor being mounted on the rear edge portion, and a nozzle wiper assembly being provided on the inner side of the rear edge portion. The 3D printing device further comprises a cutter trigger apparatus, the cutter trigger apparatus being arranged on at least one of the side edge portions. In the X-axis direction projection, the cutter trigger apparatus is at least partially located between a printing panel and the driving motor, and / or, the cutter trigger apparatus and the nozzle wiper assembly have an overlapping area. The cutter trigger apparatus comprises a base, a trigger assembly and a driving assembly, a trigger member of the trigger assembly being rotatably connected to the base; when in an initial position, the trigger member is located outside a movement space of a tool head, and when in a working position, the trigger member is at least partially located in the movement space, so as to be used for triggering a cutting assembly to cut a material. The driving assembly is mounted on the base, and is used for driving the trigger member to rotate. The 3D printing device of the present application can improve the space utilization rate, thereby facilitating the development towards miniaturization.

Description

3D printing equipment and cutter triggering device Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to a 3D printing device and a cutter triggering device. Background Technology

[0002] A 3D printer is a printing device that uses digital model files as a basis and powdered metal or plastic and other bondable materials as printing materials to form objects layer by layer. A typical 3D printing technology is fused deposition modeling (FDM), whose main printing process is as follows: the nozzle of the print head ejects filaments of molten polymer material. At the same time, the nozzle is driven by a motor to move in the XY plane according to a set path, so that the filaments of molten polymer material ejected by the nozzle form thin sheets of printing material on the two-dimensional plane. By repeating the above process and stacking the printing layers, the molten polymer material is finally printed into a three-dimensional object.

[0003] 3D printing equipment includes a frame, an XY motion mechanism, a printing panel, a tool head, and a cutter triggering device. In some existing technologies, the cutting component is located on the tool head, and the cutter triggering device is located on the frame. When it is necessary to switch filament during the printing process of the tool head, the tool head will drive the cutting component to the cutter triggering device, and the cutter triggering device will cut the current filament on the tool head so as to replace it with a different filament.

[0004] In existing technologies, the trigger element of the cutter triggering device is positioned along the X-axis. During cutting, the tool head moves along the X-axis and pushes against the trigger element to cut the filament. However, this structure occupies a large amount of space along the X-axis, significantly reducing the effective printing stroke of the tool head for 3D printing equipment with the same external shape. Therefore, when a large printing area is required, the 3D printing equipment will be very large, which is not conducive to miniaturization. Furthermore, the existing method also has low space utilization of the 3D printing equipment. Summary of the Invention

[0005] Based on the above situation, the main purpose of this application is to provide a 3D printing device and a cutting trigger device to improve the space utilization of the 3D printing device and facilitate the miniaturization of the 3D printing device.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] The first aspect of this application provides a 3D printing device, including a frame, an XY motion mechanism, a drive motor, a nozzle assembly, a tool head, a cutting assembly, and a printing panel. The XY motion mechanism is mounted on the frame, and the tool head is mounted on the XY motion mechanism and can move in the X and Y axes via the XY motion mechanism to print on the printing panel. The cutting assembly is disposed on the tool head.

[0008] The frame includes a rear part and side parts connected to both ends of the rear part. The drive motor is mounted on the rear part, and the wiping nozzle assembly is provided on the inner side of the rear part.

[0009] The 3D printing equipment also includes a cutter triggering device, which is at least disposed on one of the side portions and projected in the X-axis direction. The cutter triggering device is at least partially located between the printing panel and the drive motor, and / or the cutter triggering device has an overlapping area with the nozzle assembly.

[0010] The cutting triggering device includes a base, a triggering assembly, and a driving assembly. The triggering assembly includes a trigger element rotatably connected to the base. The trigger element has an initial position and a working position. In the initial position, the trigger element is located outside the movement space of the tool head. In the working position, the trigger element is at least partially located in the movement space, for triggering the cutting assembly to cut the material. The driving assembly is mounted on the base and is used to drive the trigger element to rotate.

[0011] Optionally, at least a portion of the inner side of the rear portion is recessed outward to form a recessed space, the recessed space penetrating the bottom surface of the rear portion, the recessed space being located on the side of the printing panel near the nozzle assembly, and the nozzle assembly being at least partially accommodated in the recessed space.

[0012] Optionally, the rotation axis of the trigger is parallel to the XY plane of the 3D printing device.

[0013] Optionally, the line connecting the trigger point of the trigger element and the center point of its rotating support segment is projected along a direction perpendicular to the XY plane as a center line, and the center line forms an angle with the rotation axis.

[0014] Alternatively, the normal direction of the trigger point of the trigger element at the time of triggering forms an angle with the rotation axis of the trigger element.

[0015] Optionally, the line connecting the trigger point of the trigger and the center point of its rotating support section is projected along the rotation axis of the trigger and taken as the center line, which is perpendicular to the rotation axis.

[0016] Alternatively, the normal direction of the trigger point of the trigger element is parallel to the rotation axis of the trigger element when it is triggered.

[0017] Optionally, the rotation axis of the trigger is perpendicular to the XY plane of the 3D printing equipment.

[0018] Optionally, the line connecting the trigger point of the trigger and the center point of its rotating support section is projected along the rotation axis of the trigger and taken as the center line, which is perpendicular to the rotation axis.

[0019] Alternatively, the normal direction of the trigger point of the trigger element is perpendicular to the rotation axis of the trigger element when it is triggered.

[0020] Optionally, the 3D printing equipment further includes an XY motion mechanism, which includes an X-axis slide rail and a Y-axis slide rail; each of the side portions is equipped with the Y-axis slide rail, and the two ends of the X-axis slide rail are slidably mounted on the two Y-axis slide rails respectively; the tool head is slidably mounted on the X-axis slide rail;

[0021] The rotation axis of the trigger is perpendicular to the X-axis slide rail and the Y-axis slide rail. The trigger is parallel to the Y-axis slide rail in the initial position and parallel to the X-axis slide rail in the working position.

[0022] Optionally, the XY motion mechanism further includes a Y-axis slider, and each Y-axis slide rail is slidably mounted with the Y-axis slider; the X-axis slide rail is slidably mounted on the Y-axis slide rail via the Y-axis slider; the Y-axis slider is used to drive the drive assembly to trigger the trigger element to rotate.

[0023] The movement space of the tool head covers the printing panel; when the Y-axis slider slides to rotate the trigger to the working position, the minimum distance between the nozzle of the tool head and the rear side of the printing panel along the Y-axis direction where the Y-axis slide rail is located is less than or equal to 15mm.

[0024] Optionally, the base is disposed above the Y-axis slide rail; the drive assembly includes a trigger rack, a drive gear, and a first transmission mechanism.

[0025] The trigger rack is slidably mounted on the base, and a trigger block is protruding from the side facing the Y-axis slide rail. The trigger block is located within the sliding stroke of the Y-axis slider.

[0026] The drive gear is rotatably mounted on the base and meshes with the trigger rack;

[0027] The trigger is provided with meshing teeth in at least a portion of the area along the rotation axis, and the meshing teeth are driven to engage with the drive gear through the first transmission mechanism.

[0028] Optionally, the first transmission mechanism includes an odd number of first transmission gears that mesh with each other sequentially, wherein the two most distant first transmission gears mesh with the driving gear and the meshing teeth on the trigger element, respectively; or,

[0029] The first transmission mechanism includes a drive rack, which is slidably mounted on the base along a direction parallel to the trigger rack, and is connected to the trigger rack via the drive gear;

[0030] The meshing teeth on the trigger engage with the drive rack.

[0031] Optionally, the trigger rack and the trigger assembly are both located on the same side of the drive rack away from the side portion, and in the direction of the Y-axis slide rail, the trigger element in the initial position is driven by the drive gear and located on the side of the drive gear away from the rear portion.

[0032] Optionally, when the trigger is in the working position, the distance between the wiping nozzle assembly and the trigger is between 5 and 25 mm.

[0033] Optionally, the rotation radius of the trigger end of the trigger element is 25 to 55 mm.

[0034] Optionally, the two ends of the rear portion are connected to the side portion through corner portions, and the top surface of the side portion is recessed from the corner portion to which it is connected, forming an accommodating space;

[0035] The base includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to the same side of the base plate and are spaced apart. The side of the first side plate facing away from the base plate forms a base overlapping surface. A first connecting lug is provided on the base overlapping surface near the second side plate. The first side plate overlaps the top surface of the side portion through the base overlapping surface and is locked to the side portion through the first connecting lug.

[0036] The rotation axis of the trigger is set on the base plate and located between the first side plate and the second side plate.

[0037] Optionally, the triggering element includes a rod body and a transmission element, the transmission element including a rotating part, the rotating part being rotatably mounted on the base; the rod body is slidably mounted on the rotating part along its centerline;

[0038] The trigger is rotatably connected to the base via the rotating part. In the working position, a buffer gap is left between the rod body and the side part along its center line direction, and under the action of the cutting assembly, it can cross the buffer gap and abut against the frame or the base.

[0039] Optionally, the rod is positioned below the rotating part when projected along a direction perpendicular to the X and Y axes.

[0040] Optionally, the transmission component further includes a sleeve portion, the rotating portion being connected to one end of the sleeve portion and located radially outward of the sleeve portion; the rod body is slidably inserted into the sleeve portion; or,

[0041] The cutter triggering device further includes a slider shaft, and the rotating part is rotatably mounted on the base via the slider shaft;

[0042] The rod body is provided with a strip-shaped hole, the extension direction of the strip-shaped hole is consistent with the center line of the rod body, and the slider shaft is slidably engaged with the strip-shaped hole so that the rod body can slide along the extension direction of the strip-shaped hole.

[0043] Optionally, the rod body and the sleeve portion are respectively provided with limiting surfaces, the two limiting surfaces are arranged facing each other along the center line of the rod body, and the reset member is disposed between the two limiting surfaces.

[0044] Optionally, a reset member is provided between the rod and the rotating part so that the rod can return to its original position after the cutting assembly is separated from the rod.

[0045] Optionally, the tool head has two nozzles; each of the side portions is respectively equipped with a cutting trigger device, which is used to cut the wire in the nozzle on the corresponding side.

[0046] Optionally, the trigger is rotatably connected to the base, and the trigger has an initial position and a working position. In the initial position, the trigger is located outside the movement space of the tool head. In the working position, the trigger is at least partially located in the movement space and on a plane parallel to the XY plane of the 3D printing device, for triggering the cutting assembly to cut the material.

[0047] The drive assembly includes a drive motor, the trigger motor is mounted on the base or frame, one end of the trigger is connected to the drive shaft of the drive motor and is rotatably mounted on the base so as to drive the trigger to rotate by the drive motor.

[0048] Optionally, the trigger includes a rod and a transmission component connected to each other, the transmission component including a rotating part, the rotating part being rotatably mounted on the base;

[0049] The drive shaft of the drive motor is connected to the rotating part in a transmission connection.

[0050] Optionally, the transmission component further includes a sleeve portion, and the rotating portion is connected to one end of the sleeve portion; the rod is slidably inserted into the sleeve portion, and in the working position, the rod can move relative to the sleeve to abut against the frame of the 3D printing equipment or the base.

[0051] Optionally, the sleeve portion is provided with a limiting hole penetrating its cylinder wall; the rod body is provided with a limiting groove;

[0052] The trigger also includes a limiting member, which is inserted into the limiting hole and has one end extending into the limiting groove.

[0053] Optionally, the rod body is provided with a stop step surface, the stop step surface facing the rotating part, and can be disposed opposite to the end of the sleeve part away from the rotating part.

[0054] Optionally, the base is mounted on the frame;

[0055] The triggering element includes a rod and a transmission element. The transmission element includes a rotating part, which is rotatably connected to the base. The rod is slidably connected to the rotating part along its centerline, and a reset element is provided between them. The triggering element has an initial position and a working position. In the initial position, the rod is located outside the movement space of the tool head. In the working position, the rod is at least partially located in the movement space, used to trigger the cutting assembly to cut material. The rod can slide against the base or the frame through the pushing of the cutting assembly, and the reset element is in a deformed state.

[0056] The drive assembly is mounted on the base and is used to drive the trigger to rotate.

[0057] Optionally, the drive assembly includes a drive rack, a trigger rack, and a drive gear. The drive rack and the trigger rack are arranged in parallel, and each of their opposite sides is provided with drive teeth. The drive rack and the trigger rack are slidably mounted on the base, and the drive gear is meshed with the drive teeth on the drive rack and the trigger rack.

[0058] The rotating part has a ring-shaped structure, and at least a portion of its outer peripheral surface is provided with meshing teeth that mesh with the driving teeth.

[0059] Optionally, the drive rack is closer to the frame than the trigger rack, the trigger and the trigger rack are located on the same side of the drive rack, the rod extends beyond the drive rack in the direction of the rotation axis of the rotating part, and in the working position, the trigger end of the rod is located on the side of the trigger rack.

[0060] Optionally, the base includes a base plate, a first side plate and a second side plate disposed opposite to each other, the drive rack is disposed in contact with the inner side surface of the first side plate; the trigger rack is disposed near the second side plate; the rotating part is rotatably connected to the base plate; wherein, the second side plate is notched at one end near the rotating part, so that the area corresponding to the notched corner on the base plate forms the rotation space of the trigger.

[0061] Optionally, the base plate, the first side plate, and the second side plate are in a U-shaped structure.

[0062] Optionally, a surrounding panel is also connected to the edge of the base plate, the surrounding panel being located between the first side plate and the second side plate, and on the same side of the base plate as the first side plate.

[0063] Optionally, in the direction of the rotation axis of the rotating part, the rod extends beyond the first side plate to the side opposite to the bottom plate; the side of the first side plate opposite to the bottom plate overlaps the frame, and the opening of the U-shaped structure faces downward.

[0064] Optionally, the frame and the base are an integral structure.

[0065] A second aspect of this application provides a cutter triggering device for any of the 3D printing devices described above, the 3D printing device including a frame, a tool head, and a cutting assembly, the cutting assembly being disposed on the tool head, the tool head being movably mounted on the frame; the cutter triggering device includes a base, a triggering component, and a driving component;

[0066] The triggering component includes a trigger member, which is rotatably connected to the base about a rotation axis that forms an angle with its center line. The trigger member has an initial position and a working position. In the initial position, the trigger member is located outside the movement space of the tool head. In the working position, the trigger member is at least partially located in the movement space, perpendicular to the Y-axis direction, and located on a plane parallel to the XY plane of the 3D printing device, for triggering the cutting component to cut the material.

[0067] The drive assembly includes a drive motor, the trigger motor is mounted on the base or frame, one end of the trigger is connected to the drive shaft of the drive motor and is rotatably mounted on the base so as to drive the trigger to rotate by the drive motor.

[0068] Optionally, the trigger includes a rod and a transmission component connected to each other, the transmission component including a rotating part, the rotating part being rotatably mounted on the base;

[0069] The drive shaft of the drive motor is connected to the rotating part in a transmission connection.

[0070] Optionally, the transmission component further includes a sleeve portion, and the rotating portion is connected to one end of the sleeve portion; the rod is slidably inserted into the sleeve portion, and in the working position, the rod can move relative to the sleeve portion to abut against the frame of the 3D printing equipment or the base.

[0071] Optionally, the sleeve portion is provided with a limiting hole penetrating its cylinder wall; the rod body is provided with a limiting groove;

[0072] The trigger also includes a limiting member, which is inserted into the limiting hole and has one end extending into the limiting groove.

[0073] Optionally, the rod body is provided with a stop step surface, the stop step surface faces the rotating part and can be disposed opposite to the end of the sleeve part away from the rotating part, and a return spring is provided between the rod body and the sleeve part.

[0074] This application places the cutter triggering device on the side, between the printing panel and the drive motor. The triggering device is a rotating structure; in its initial position, it is outside the movement space, rotating into the movement space only when cutting is required. This prevents the trigger from occupying the tool head's movement space when not cutting, thus increasing the printing space. This arrangement also fully utilizes the space near the nozzle assembly located outside the printing platform within the frame, further improving space utilization. With the same external dimensions, it increases the tool head's travel distance, especially in the X-axis direction; within a certain range of travel distance, it reduces the overall size of the 3D equipment, facilitating miniaturization.

[0075] Other beneficial effects of this application will be explained in detail through the introduction of specific technical features and technical solutions in the specific embodiments. Those skilled in the art should be able to understand the beneficial technical effects brought about by the technical features and technical solutions through the introduction of these technical features and technical solutions. Attached Figure Description

[0076] The preferred embodiments of this application will now be described with reference to the accompanying drawings.

[0077] Figure 1 is a partial structural schematic diagram of a preferred embodiment of the 3D printing equipment provided in this application;

[0078] Figure 2 is a magnified view of part I in Figure 1;

[0079] Figure 3 is a top view of a partial structure of a preferred embodiment of the 3D printing equipment provided in this application;

[0080] Figures 4-7 are schematic diagrams showing the initial position, working position, over-rotation position and avoidance position of the cutter triggering device in a preferred embodiment of the 3D printing equipment provided in this application;

[0081] Figure 8 is an exploded view of a preferred embodiment of the cutter triggering device in the 3D printing equipment provided in this application;

[0082] Figure 9 is a schematic diagram of a preferred embodiment of the trigger rotation method in the 3D printing equipment provided in this application;

[0083] Figure 11 is a schematic diagram of a preferred embodiment of the base in the 3D printing equipment provided in this application;

[0084] Figure 12 is an exploded view of a preferred embodiment of the triggering component in the 3D printing equipment provided in this application;

[0085] Figure 13 is an exploded view of a preferred embodiment of the drive component in the 3D printing equipment provided in this application;

[0086] Figure 14 is a structural schematic diagram of a preferred embodiment of the transmission component in the 3D printing equipment provided in this application;

[0087] Figure 15 is a structural schematic diagram of a preferred embodiment of the rod in the 3D printing equipment provided in this application;

[0088] Figures 16 and 17 are schematic diagrams of the structure of the rod body relative to the rotating part in two different states when the trigger is in the working position in a preferred embodiment of the 3D printing equipment provided in this application.

[0089] Figure 18 is a partial structural diagram of the frame in a preferred embodiment of the 3D printing equipment provided in this application;

[0090] Figure 19 is a partial enlarged view of the embodiment shown in Figure 3.

[0091] In the diagram: 110, Frame; 111, Rear side; 1116, Recessed space; 113, Side side; 115, Front side; 121, First drive motor; 125, Y-axis slide rail; 126, Y-axis slider; 1261, Slider protrusion; 127, X-axis slide rail; 230, Printing panel; 400, Nozzle assembly; 500, Trash can; 600, Cutter triggering device; 610, Base; 611, Base plate; 612, First side plate; 6121, Base overlapping surface; 613, Second side plate; 614, Limiting groove; 615, First connecting lug; 616, Second connecting lug; 617, Enclosure plate; 620. Trigger assembly; 621. Trigger element; 6211. Trigger end; 6212. Rod body; 6212a. Limiting groove; 6213. Transmission element; 6213a. Rotating part; 6213b. Sleeve part; 6213c. Connecting plate; 6213e. Limiting hole; 6214. First trigger protrusion; 6215. Second trigger protrusion; 6216. Limiting element; 6217. Return spring; 6218a. Standby groove; 6218b. Working groove; 6218c. Over-rotation groove; 6218d. Communicating groove; 623. Rotating shaft; 630. Drive assembly; 631. Trigger rack; 6311. Mounting hole; 6312. Rack part; 6313. Trigger block; 632. Drive gear; 633. Drive rack; 640. Limiting ball; 650. Return torsion spring; 700, Tool head; 710, Feed inlet. Detailed Implementation

[0092] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the following detailed description of the present application, some specific details are described in detail, but well-known methods, processes, flows, and elements are not described in detail in order to avoid obscuring the substance of the present application.

[0093] Furthermore, those skilled in the art should understand that the accompanying drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale.

[0094] Unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as encompassing rather than being exclusive or exhaustive; that is, meaning "including but not limited to."

[0095] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0096]

Example 1

[0097] This application provides a 3D printing device, as shown in Figures 1-19. The 3D printing device includes a frame 110, an XY motion mechanism, a drive motor (denoted as the first drive motor), a nozzle assembly 400, a tool head 700, a cutting assembly, and a printing panel 230. The XY motion mechanism is mounted on the frame 110, and the tool head 700 is mounted on the XY motion mechanism. The tool head 700 can move in the X-axis and Y-axis directions through the XY motion mechanism to print on the printing panel 230. The frame 110 includes a rear portion 111 and side portions 113 connected to both ends of the rear portion 111. A drive motor is mounted on the rear portion 111, and a nozzle assembly 400 is disposed on the inner side of the rear portion 111. The 3D printing equipment also includes a cutter triggering device 600, which is disposed at least on one of the side portions 113. Projected in the X-axis direction, the cutter triggering device 600 is located between the printing panel 230 and the drive motor, and / or, the cutter triggering device 600 and the nozzle assembly 400 have an overlapping area. The cutting trigger device 600 includes a base 610, a trigger assembly 620, and a drive assembly 630. The trigger assembly 620 includes a trigger member 621, which is rotatably connected to the base 610. The trigger member 621 has an initial position (as shown in Figure 4) and a working position (as shown in Figure 5). In the initial position, the trigger member 621 is located outside the movement space of the tool head. In the working position, the trigger member 621 is at least partially located in the movement space and is used to trigger the cutting assembly to cut the material. The drive assembly 630 is mounted on the base 610 and is used to drive the trigger member 621 to rotate.

[0098] As shown in Figures 1-3 and 14, the frame 110 is a square frame 110, including a rear side 111 arranged opposite to each other, a side side 113 connected to both ends of the rear side 111, and a front side 115 opposite to the rear side 111 and connecting the two side side 113. That is, the rear side 111, one side side 113, the front side 115 and the other side side 113 are connected end to end in sequence. The XY motion mechanism includes an X-axis slide rail, an X-axis slider, a Y-axis slide rail 125, and a Y-axis slider 126. Y-axis slide rails 125 are mounted on each side 113, and Y-axis sliders 126 are slidably mounted on each Y-axis slide rail 125. Both ends of the X-axis slide rail are connected to the Y-axis sliders 126 on both sides. The X-axis slider is slidably mounted on the X-axis slider, and the tool head is connected to the X-axis slider. Driven by a first drive motor, the tool head moves along the X-axis and Y-axis directions through the sliding of the X-axis slider and the Y-axis slider 126, thus printing on the printing panel 230. The first drive motor is mounted on the rear 111 and can synchronously drive the X-axis and Y-axis sliders. The nozzle assembly 400 and the waste bin 500 of the 3D printing equipment are positioned near the rear 111. The cutter trigger device 600 can be installed on only one side 113, or the cutter trigger device 600 can be installed on both side 113 respectively. In the projection of the X-axis direction, the cutter trigger device 600 is basically located between the printing panel 230 and the first drive motor 121.

[0099] Referring to Figures 4-13, the trigger 621 has a trigger end 6211 and a connecting end. It is rotatably set relative to the base 610 at the connecting end. Within the rotation stroke of the trigger 621, it has an initial position, as shown in Figures 3 and 4, where the trigger 621 is close to the side edge 113 of the frame 110 on the same side, completely outside the movement space of the tool head, and also outside the space of the printing panel 230 on the side edge 113. When the trigger 621 rotates to the working position, as shown in Figure 5, the trigger 621 can rotate from the initial position toward the inside of the frame 110, i.e., rotate in the first rotation direction to the working position. At this time, the center line of the trigger 621 is perpendicular to the Y-axis slide rail, i.e., parallel to the X-axis slide rail. The tool head moves toward the trigger 621 along the X-axis slide rail, and the cutting assembly on it collides with the trigger end 6211 of the trigger 621, thereby pushing the cutting assembly to cut the material through the trigger 621.

[0100] This application places the cutter trigger device 600 on the side 113, between the printing panel 230 and the first drive motor 121. The cutter trigger device 600 is configured as a rotating structure. In the initial position, the trigger 621 is located outside the movement space. It rotates into the movement space only when cutting is required. In this way, the trigger 621 will not occupy the movement space of the tool head when not cutting, thereby increasing the printing space. This arrangement can make full use of the space near the nozzle assembly arranged outside the printing platform within the frame, thereby further improving the space utilization rate within the frame. Under the same external dimensions, the movement stroke of the tool head can be increased, especially the stroke in the X-axis direction. Within a certain range of movement stroke, the overall size of the 3D equipment can be reduced, which is conducive to miniaturization.

[0101] In one embodiment, when viewed along the Z-axis or along a direction perpendicular to the XY plane, the trigger 621 overlaps with the Y-axis slider 126 at at least one position in its initial position. It is understood that, due to positional interference, the movement limit of the tool head 700 along the X-axis will not exceed that of the Y-axis slider 126.

[0102] It should be noted that in the 3D printing equipment, the cutter trigger device 600 and the nozzle assembly 400 are arranged in pairs, and the same pair of cutter trigger devices 600 and nozzle assemblies 400 are located on the same side in the X-axis direction. That is, when only one side 113 is provided with a cutter trigger device 600, only one nozzle assembly 400 is provided, and it is located in the area of ​​the rear 111 near the side 113; when both side 113 are provided with cutter trigger devices 600, two nozzle assemblies 400 are provided, and they are respectively located in the area of ​​the rear 111 near the two side 113.

[0103] As shown in Figures 13 and 19, the 3D printing equipment also includes a nozzle assembly 400 and a trash can 500 arranged within the frame. The cutter triggering device 600 is positioned close to the nozzle assembly 400 and / or the trash can 500, and all three share the space within the frame 110 in the Y-axis direction. That is, when projected along the X-axis direction, the cutter triggering device 600 and the nozzle assembly 400 and / or the trash can 500 have an overlapping area. Thus, in the Y-axis direction, the cutter triggering device 600 and the nozzle assembly 400 and / or the trash can 500 share the space in the Y-axis direction within the frame, thereby further reducing the space occupied in the Y-axis direction and reducing the overall size of the 3D printing equipment in the Y-axis direction.

[0104] In the first embodiment, the rotation axis of the trigger 610 can be perpendicular to the XY plane of the 3D printing device, as shown in Figures 4 and 9. In these embodiments, the line connecting the trigger point of the trigger 610 and the center point of its rotation support section is projected along the rotation axis of the trigger 610 as a center line. This center line can be perpendicular to the rotation axis of the trigger 610. Alternatively, the normal direction of the trigger point of the trigger 610 during triggering can be perpendicular to the rotation axis of the trigger 610. In other words, the direction of the triggering force of the trigger 610 during triggering is perpendicular to the rotation axis of the trigger 610.

[0105] In the second embodiment, the rotation axis of the trigger 610 is parallel to the XY plane of the 3D printing device, as shown in Figure 10. In these embodiments, one approach is to project along a direction perpendicular to the XY plane, with the line connecting the trigger point of the trigger 610 and the center point of its rotating support segment as a center line, which forms an angle with the rotation axis of the trigger 610; or, the normal direction of the trigger point of the trigger 610 at the time of triggering forms an angle with the rotation axis of the trigger 610; or, the direction of the triggering force of the trigger 610 at the time of triggering forms an angle with the rotation axis of the trigger 610, as shown in Figure 10. In another embodiment, the line connecting the trigger point of the trigger 610 and the center point of its rotating support section is projected along the rotation axis of the trigger 610 as a center line, which is perpendicular to the rotation axis; or, the normal direction of the trigger point of the trigger 610 when it is triggered is parallel to the rotation axis of the trigger 610, or in other words, the direction of the triggering force of the trigger 610 when it is triggered is parallel to the rotation axis of the trigger 610.

[0106] It should be noted that the rotating support section of the trigger member mentioned above refers to the section located at the rotation axis of the trigger member. In the embodiment that includes a rotating part (described in detail below), it refers to the rotating part. The midpoint of the rotating support section refers to the center of the rotating support section in the direction of the rotation axis of the trigger member 610.

[0107] By using the two different ways of setting the rotation axis of the trigger 621 relative to the center line, the space occupied by the 3D printing equipment on the Z-axis (i.e., the axis in the height direction) can be significantly saved, further optimizing the overall structure of the 3D printing equipment.

[0108] In the above embodiments, the cross-sectional area of ​​the rear portion 111 is larger than that of the side portion 113 and the front portion 115. Furthermore, the rear portion 111 adopts a double-layer plate structure, while the side portion 113 and the front portion 115 adopt a single-plate structure. This can increase the strength of the entire frame 110 and increase the reliability of the first drive motor 121. At the same time, by setting the side portion 113 as a single-plate structure, the movement space of the tool head in the X-axis direction can be increased.

[0109] In this design, at least a portion of the inner surface of the rear portion 111 is recessed outward to form a recessed space 1116. The recessed space 1116 extends through the bottom surface of the rear portion 111 and is located on the side of the printing panel 230 near the nozzle assembly 230. The nozzle assembly 230 is at least partially accommodated within the recessed space 1116. Referring to Figure 18, the cross-section of the rear portion resembles an L-shaped structure, with the recessed space 1116 formed inside the L-shaped structure. The recessed space 1116 is located in the lower inner region of the rear portion and opens towards the lower inner side of the frame 110. The nozzle assembly 400 can be partially accommodated within this space, thus fully utilizing the thickness dimension of the rear portion 111 (i.e., the dimension parallel to the Y-axis), increasing the utilization rate of the internal space of the frame 110, and further facilitating the miniaturization of the entire 3D printing equipment.

[0110] The nozzle assembly 400 is located in the non-printing space between the printing panel 230 and the rear side 111. Therefore, printing cannot be performed in this non-printing space. This application sets most of the structure of the cutter triggering device 600 in the side side 111 corresponding to the non-printing space, which can further improve the space utilization of the entire frame and make the structure of the entire 3D printing equipment more compact.

[0111] In the second embodiment described above, preferably, the rotation axis of the trigger member 621 forms an acute angle with the center line of the trigger member 621, as shown in FIG10. Specifically, the trigger assembly 620 is such that the angle between the rotation axis of the trigger member 621 and the center line of the trigger member 621 is an acute angle. The solid line in the figure shows the initial position of the trigger member 621, and the dashed line shows the trigger member 621 rotating to the working position. By adopting this method, the flexibility of the trigger device setting can be increased, and the occupation of the printing space in the frame 110 can be further reduced.

[0112] In the first embodiment described above, the rotation axis of the trigger 621 is perpendicular to the center line of the trigger 621, as shown in FIG9. Specifically, the rotation axis of the trigger 621 is perpendicular to the center line of the trigger 621. Thus, the area swept by the rotation of the trigger 621 is a plane, which can better reduce the overall space of the cutter triggering device 600 and reduce the space occupied inside the frame 110.

[0113] The rotation axis of the trigger 621 can be perpendicular to the XY plane or form an angle with the XY plane. Preferably, the rotation axis of the trigger 621 is perpendicular to the XY plane of the XY motion mechanism. With this configuration, the tool head can be conveniently moved in the X and Y axes of the 3D printing equipment by the movement of the XY motion mechanism. The fact that the rotation axis of the trigger is perpendicular to the XY plane saves Z-axis space and facilitates the setting and positioning of the trigger.

[0114] As mentioned above, the 3D printing equipment also includes an XY motion mechanism, which includes an X-axis slide rail 127 and a Y-axis slide rail 125. Y-axis slide rails 125 are mounted on each side portion 113, and the two ends of the X-axis slide rail 127 are slidably mounted on the two Y-axis slide rails 125 respectively. The tool head is slidably mounted on the X-axis slide rail 127, specifically via an X-axis slider slidably mounted on the Z-axis slide rail 127. In the embodiment where the rotation axis of the trigger 621 is perpendicular to the X-axis slide rail 127 and the Y-axis slide rail 125 (i.e., perpendicular to the XY plane), the trigger 621 is parallel to the Y-axis slide rail 125 in the initial position and parallel to the X-axis slide rail 127 in the working position. Furthermore, in the initial position, the trigger 621 is positioned immediately adjacent to its side portion 113. This structure further reduces the space occupied by the cutter trigger device 600 in the X-axis direction in the initial position, thereby increasing the printing space in the X-axis direction.

[0115] In one embodiment, the cutter triggering device 600 is located above the Y-axis slide rail 125 on its side. The XY motion mechanism also includes a Y-axis slider 126, with each Y-axis slide rail 125 slidably mounted with a Y-axis slider 126; the X-axis slide rail 127 is slidably mounted on the Y-axis slide rail 125 via the Y-axis slider 126; the Y-axis slider 126 is used to drive the drive assembly 630 to trigger the trigger member 621 to rotate. That is, the rotation of the trigger member 621 is triggered by the Y-axis slider 126. As shown in Figure 2, the top of the Y-axis slider 126 has a slider protrusion 1261. When the Y-axis slider 126 slides, it pushes against the trigger assembly 630 through the slider protrusion 1261, thereby driving the trigger member 621 to rotate. Of course, the rotation of the trigger member 621 can also be driven by other means, such as direct drive by a rotary motor.

[0116] As shown in Figure 3, the movement space of the tool head covers the printing panel 230. That is, in the height direction (projection in the Z-axis direction), the movement space of the tool head is greater than that of the printing panel 230. The tool head can move to the cutter trigger device 600 and the nozzle assembly 400 to cut the wire on the tool head. When the Y-axis slider 126 slides to make the trigger 621 rotate to the working position, the minimum distance D1 between the nozzle of the tool head and the rear side of the printing panel 230 along the Y-axis direction where the Y-axis slide rail 125 is located is less than or equal to 15mm, such as 15mm, 20mm, 25mm or 30mm. In other words, when the Y-axis slider 126 drives the drive assembly 630 to rotate the trigger 621 to the working position, the tool head also moves to the vicinity of the cutter trigger device 600. At this time, the nozzle of the tool head can be located on the outside or inside of the printing panel 230. In either case, the minimum distance D1 between the nozzle and the rear edge of the printing panel 230 is less than or equal to 15mm, as shown in Figure 19. Figure 19 shows the feed inlet 710, which is located at the same position as the nozzle in the Y-axis direction. Therefore, in the top view of the figure, D1 indicates the position of the nozzle with the center of the feed inlet 710. This method can further reduce the size of the entire frame, which is beneficial for miniaturization.

[0117] Referring again to Figures 1 and 3, the base 610 is positioned above the Y-axis slide rail 125, and the cutter triggering device is also positioned above the Y-axis slide rail 125. Furthermore, in the initial position, the trigger element 621 has its trigger end 6211 located at the end of the trigger element 621 facing away from the rear edge 111. This allows most of the components of the cutter triggering device 600 to be positioned away from the print panel 230 and closer to the rear edge 111, further improving the space utilization of the entire frame 110 in the Y-axis direction.

[0118] Referring to Figures 4-15, the drive assembly 630 includes a trigger rack 631, a drive gear 632, and a first transmission mechanism. The trigger rack 631 is slidably mounted on the base 610, and the drive gear 632 is rotatably mounted on the base 610 and meshes with the trigger rack 631. The trigger member 621 has at least partially meshing teeth on its rotation axis, and the meshing teeth are driven to engage with the drive gear 632 through the first transmission mechanism. As the name suggests, the trigger rack 631 is triggered to slide, ultimately driving the cutter to be triggered. The movement of the trigger rack 631 after being triggered is transmitted through the drive gear 632 meshing with it. The drive gear 632 drives the meshing teeth on the trigger member 621 to rotate through the first transmission mechanism. The rotation of the meshing teeth drives the trigger member 631 to rotate, thereby realizing the rotation of the trigger member 621 from the initial position to the working position.

[0119] A trigger block 6313 protrudes from the side of the trigger rack 631 facing the Y-axis slide rail 125. The trigger block 6313 is located within the sliding stroke of the Y-axis slider 126. During the sliding of the Y-axis slider 126, the slider 126 pushes against the trigger block 6313, causing the trigger rack 631 to slide, thereby driving the trigger element 621 to rotate. Preferably, a slider protrusion 1261 protrudes from the side of the Y-axis slider 126 facing the cutter trigger device 600. The Y-axis slider 126 pushes the trigger rack 631 to slide through the pushing action of the slider protrusion 1261 and the trigger block 6313. This structure of the trigger block 6313 further reduces the size of the cutter trigger device in the Z-axis direction, thereby reducing the overall size of the 3D printing equipment.

[0120] In one embodiment, the first transmission mechanism includes one or more first transmission gears that mesh sequentially with each other. That is, there can be only one first transmission gear or multiple first transmission gears, such as an odd number, specifically three. Among the one or more odd number of meshing first transmission gears, the two most distant first transmission gears mesh with the meshing teeth on the drive gear 632 and the trigger 621, respectively. Through the transmission between the meshing teeth on the drive gear 632 and the trigger 621 by the odd number of meshing first transmission gears, the rotation direction of the trigger 621 can be aligned with the rotation direction of the drive gear 632, smoothly realizing the rotation of the trigger 621 from its initial position to its working position. There can be only one first transmission gear, or there can be three, five, or more. Preferably, only one first transmission gear is provided to further reduce the size of the cutter triggering device 600 in the Y-axis direction. In one embodiment, by means of an odd number of meshing first transmission gears, the transmission between the meshing teeth of the drive gear 632 and the trigger 621 can be made so that the trigger 610 can eventually rotate from the outside of the base to the inside of the base, thereby reducing the volume of the cutter triggering device 600 and smoothly realizing the rotation of the trigger 621 from the initial position to the working position.

[0121] In another embodiment, the first transmission mechanism includes a drive rack 633, which is slidably mounted on the base 610 in a direction parallel to the trigger rack 631, and is connected to the trigger rack 631 via a drive gear 632. The meshing teeth on the trigger member 631 mesh with the drive rack. As shown in Figure 4, the drive rack 633 and the trigger rack 631 are arranged parallel to each other and opposite each other in the X-axis direction. Both of them have drive teeth on their opposite sides. The drive gear 632 is located between them and meshes with the drive teeth of both. The meshing teeth on the trigger member 621 mesh with the drive teeth on the drive rack 633. Thus, when the trigger rack 631 is driven to slide, the transmission is realized sequentially through the trigger rack 631, the drive gear 632, the drive rack 633, and the meshing teeth. Finally, the trigger member is driven to rotate from the initial position to the working position.

[0122] In a preferred embodiment, both the trigger rack 631 and the trigger assembly 620 are located on the same side of the drive rack 633 away from the side portion 113. In the direction of the Y-axis slide rail 125, the trigger assembly 620, in its initial position, is arranged side-by-side with the drive gear 632, and is located on the side of the drive gear 632 away from the rear portion 111. Referring again to FIG3, when the trigger member 621 is in its initial position, the trigger rack 631 and the trigger assembly 620 are located on the same side of the drive rack 633. Specifically, both are located on the side of the drive rack 633 where the drive teeth are located. The trigger rack 631 and the trigger assembly 620 do not overlap in the X-axis direction. The trigger assembly 620 is located on the side of the drive gear 632 away from the rear portion 111, meaning the drive gear 632 is closer to the rear portion 111 than the trigger assembly 620. The trigger assembly 620 is also located on the side of the trigger rack 631 away from the rear portion 111. This approach reduces the space occupied by the cutting trigger device in the X-axis direction, and within the same sliding stroke of the trigger rack 631, the cutting trigger device 600 has the smallest size in the Y-axis direction, thereby further reducing the space occupied by the cutting trigger device in the Y-axis, and thus increasing the travel stroke of the tool head in both the X and Y axes. Of course, in some embodiments, the trigger element 621 and the trigger rack 631 can also be located on different sides of the drive rack 633, and the trigger assembly 621 and the trigger rack 631 can also be arranged side-by-side in the Y-axis direction.

[0123] Preferably, when the trigger 621 is in the working position, the distance between the wiping nozzle assembly 400 and the trigger 621 is between 5 and 25 mm, as shown in Figures 3 and 9. Projected along the X-axis, the centerline of the trigger is located inside the wiping nozzle assembly, and the distance D2 between the centerline of the trigger and the shape center of the wiping nozzle assembly is between 5 and 25 mm. This distance setting further improves the space utilization rate of the frame 110 in the Y-axis direction.

[0124] In a preferred embodiment, the rotation radius R of the trigger end 6211 of the trigger member 621 is 25-55mm, as shown in Figure 19. The distance between the trigger end 6211 and the rotation axis of the trigger member 621 is 25-55mm. This makes the Y-axis distance between the trigger end 6211 in the initial position and the working position as small as possible, thereby making the structure of the entire 3D printing equipment more compact and reducing the overall volume.

[0125] Referring again to Figure 18, the two ends of the rear portion 111 are connected to the side portion 113 via corners. The top surface of the side portion 113 is recessed compared to the corner to which it is connected, forming an accommodating space. The base 610 includes a base plate 611, a first side plate 612, and a second side plate 613, as shown in Figure 11. The first side plate 612 and the second side plate 613 are connected to the same side of the base plate 611 and are spaced apart. The side of the first side plate 612 facing away from the base plate 611 forms the base 610 overlapping surface 6121. A first connecting lug 615 protrudes from the area of ​​the base overlapping surface 6121 near the second side plate 613. The first side plate 612 overlaps the top surface of the side portion 113 via the base overlapping surface 6121 and is locked to the side portion 113 via the first connecting lug 615. The rotation axis of the trigger 621 is located on the base plate 611 and between the first side plate 612 and the second side plate 613. In other words, the first side plate 612, the second side plate 613, and the base plate 611 basically form a U-shaped structure. After the cutter triggering device 600 is installed on the frame 110, the opening of the U-shaped structure faces downwards, that is, the opening of the U-shaped structure faces the Y-axis slide rail 125. By adopting a U-shaped structure and setting it downwards, the strength of the base 610 can be increased, and the triggering component 610 and the drive component 620 can be partially covered to prevent debris from falling into the gears, racks, and other structural components. At the same time, the U-shaped structure has an open surface, which also facilitates the installation of the various components of the cutter triggering device 600. Furthermore, the base 610 also includes a surrounding plate 617, which is set along the edge of the base plate 611 and can be connected to one end of the first side plate 612 to further increase the strength of the base 610.

[0126] The 3D printing equipment also includes a frame, which is mounted on top of the frame 110 via its corners. A second connecting lug 616 protrudes from the side of the base plate 611 opposite to the first side plate 612, as shown in Figure 2. The side of the second connecting lug 616 opposite to the second side plate 613 forms a base positioning surface, which is positioned and locked to the inner side of the frame. A cutting trigger device 600 is mounted using both the first connecting lug 615 and the second connecting lug 616. Adding the frame and the second connecting lug 616 facilitates product manufacturing and assembly, and more importantly, increases the reliability and stability of the cutting trigger device 600, thereby enabling precise cutting of the filament.

[0127] In one embodiment, the trigger 621 includes a rod 6212 and a transmission member 6213. The transmission member 6213 includes a rotating part 6213a, which is rotatably mounted on the base 610. Specifically, it can be rotatably mounted on the base 610 via a rotating shaft, such as a rotating shaft that can be locked to the base 610, with the rotating part 6213a sleeved on the rotating shaft. When the base 610 includes a base plate 611, it can be rotatably mounted on the base plate 611. The rod 6212 is slidably mounted on the rotating part 6213a along its centerline, meaning that the rod 6212 can slide relative to the rotation axis of the trigger 621 (specifically, the rotation axis of the rotating part 6213a). In this embodiment, the trigger 621 is rotatably connected to the base 610 via the rotating part 6213a. In the working position, the rod 6212 has a buffer gap between itself and the side part 113 along its centerline direction, and under the action of the cutting assembly, it can cross the buffer gap and abut against the rear part 111. Referring to Figures 16 and 17, which are schematic diagrams of the trigger 621 in the working position, when the rod 6212 is not subjected to the force of the cutting assembly, although it has rotated to the working position, a buffer gap still remains between it and the rear part 111, as shown in Figure 16. This means that there is a distance between the two, so they will not contact or touch each other; when the rod 6212 is subjected to the pushing force of the cutting assembly, the rod 6212 slides relative to the rotating part towards the rear side 111 until it touches the rear side 111, as shown in Figure 17. The end of the rod 6212 away from the trigger end 6211 touches the rear side 111, thereby transmitting the pushing force of the cutting assembly to the frame 110. Therefore, it is possible to avoid the rotating part 6213a and the base 610 being subjected to too much force, thereby improving the reliability of the entire cutter triggering device.

[0128] Preferably, the rod 6212 and the rotating part 6213a are offset in the direction of the rotation axis of the trigger 621. When the cutter triggering device is installed on the side part 113, the rod 6212 is located below the rotating part 6213a in the projection along the Y-axis direction. In embodiments where the base 610 has a U-shaped structure, more preferably, the rod 6212 extends beyond the first side plate 612. In this way, the height of the cutter triggering device 600 can be further reduced, facilitating the manufacturing and assembly of components.

[0129] The sliding of the rod 6212 relative to the rotating part 6213a can be achieved in various ways, such as through a sleeve structure. Specifically, the transmission component 6213 also includes a sleeve part 6213b, as shown in Figures 5 and 12. The rotating part 6213a is connected to one end of the sleeve part 6213b and is located radially outside the sleeve part 6213b; the rod 6212 is slidably inserted into the sleeve part 6213b. This structure avoids single-point support of the rod 6212, improving sliding stability and preventing rod deformation, especially ensuring the structural stability of the rod under the resistance of the cutting assembly. Furthermore, this method allows the supporting force of the sliding of the rod 6212 to act on the sleeve part 6213b and then be transmitted to the rotating part 6213a, thus improving the overall reliability of the device.

[0130] For example, the rod 6212 can slide through the cooperation of the slide rail and the slider. The cutter triggering device 600 also includes a slider shaft, and the rotating part 6213a is rotatably mounted on the base 610 through the slider shaft. Correspondingly, the rod 6212 is provided with a strip hole, the extension direction of which is consistent with the center line of the rod 6212, and it slides with the slider shaft. Specifically, the base 610 is provided with a locking hole, and the slider shaft includes a locking section, a rotating shaft section, a sliding section, and a limiting section arranged in sequence. The slider shaft passes through the strip hole and the center hole of the rotating part 6213a in sequence. The locking section is threadedly locked to the locking hole. The rotating section serves as the rotating shaft of the rotating part 6213a. The sliding section slides with the strip hole. The limiting section is located on the side of the strip hole away from the rotating part 6213a, projected along the axis of the rotating shaft section, and at least part of the limiting section is located outside the strip hole. In this embodiment, the rotating shaft is directly reused as a slider that cooperates with the rod 6212, which can save the number of parts, reduce the cost of the product, and facilitate assembly.

[0131] Furthermore, a reset element is provided between the rod 6212 and the rotating part 6213a so that the rod 6212 can return to its original position after the cutting assembly is separated from the rod 6212. Specifically, the reset element can be a return spring 6217.

[0132] In some embodiments, the trigger member has a first trigger protrusion 6214 protruding outward. In the working position, the first trigger protrusion 6214 is located on the side near the drive gear and within the sliding stroke of the Y-axis slider, so that the trigger member 621 can be rotated from the working position to the initial position by pushing the first trigger protrusion 6214 through the Y-axis slider. Further, the trigger member 621 also has a second trigger protrusion 6215, and the first trigger protrusion 6214 and the second trigger protrusion 6215 are symmetrically arranged about the center line of the trigger member 621. The trigger member can also return to the initial position from the working position (or over-rotation position) by being pushed by the sliding Y-axis slider through the second trigger protrusion (described in detail below). Furthermore, by providing two protrusions, the same set of trigger members 621 can be used when the cutter triggering device is set on both sides, thereby improving the versatility of the cutter triggering device.

[0133] In some embodiments, in order to prevent the initial position and working position trigger 621 from rotating freely, a limiting groove 614 is provided on the base 610, specifically on the base plate 611, and a limiting ball 640 is installed in the limiting groove 614, as shown in Figure 8. Accordingly, the trigger member 621 is provided with a standby groove 6218a and a working groove 6218b, as shown in Figure 14. The standby groove 6218a and the working groove 6218b can be provided on the transmission member 6213, and more specifically, they can be provided on the connecting plate 6213c connected to the outer periphery of the bottom of the rotating part 6213a. When the trigger member 621 is in the initial position, the standby groove 6218a rotates to a position opposite to the limiting groove 614, and the limiting ball 640 is in a limiting engagement with the standby groove 6218a. When the trigger member 621 is in the working position, the working groove 6218b rotates to a position opposite to the limiting groove 614, and the limiting ball 640 is in a limiting engagement with the working groove 6218b. In some cases, the trigger 621 may be accidentally activated. To prevent the trigger 621 from being accidentally activated and rotated to an inappropriate position, the trigger of this application is also provided with an over-rotation groove 6218c, which can be specifically provided on the transmission member 6213 (further provided on the connecting plate 6213c). The trigger 621 also has an initial position, a working position and an over-rotation position in sequence along the first rotation direction within its rotation stroke. In the over-rotation position, the limiting ball 640 cooperates with the over-rotation groove 6218c to limit the trigger 621 to be positioned in the over-rotation position that exceeds the working position. The first rotation direction refers to the direction from the initial position to the working position with the minimum rotation angle. Furthermore, the cutter triggering device also includes a reset torsion spring 650, which is movably mounted on the base 710. Its first side abuts against the base 610 or the drive assembly (which can be a drive rack if a drive rack is included), and its second side is located in the section of the trigger member 621 that exceeds the over-rotation position during its rotational stroke in the first rotational direction. So that when the trigger member rotates in the first rotational direction to exceed the over-rotation position, it will return to the over-rotation position under the reset force of the reset torsion spring 640.

[0134] In the above embodiments, the tool head can be a single-nozzle or a dual-nozzle type. In a preferred embodiment, the tool head has two nozzles arranged side-by-side along the X-axis. This dual-nozzle structure reduces the number of filament changes, making printing more convenient and faster. In this embodiment, each side 113 is equipped with a cutter triggering device 600, which is used to cut the filament in the nozzle on the corresponding side. That is, as mentioned above, triggering devices 600 are installed on both side 113. Correspondingly, wiping nozzle assemblies 400 are also provided near both ends of the rear side 111.

[0135] In some embodiments, the 3D printing equipment also includes a trash can 500, as shown in Figure 3. A trash can 500 can be provided at each wiping nozzle assembly 400 so that the waste material removed by the wiping nozzle assembly 400 falls into the trash can 500.

[0136]

Example 2

[0137] In the above embodiments, the trigger element 621 of the cutter triggering device 600 can be driven by a motor in addition to being driven by the aforementioned drive assembly 630. Specifically, this application also provides a cutter triggering device 600 for a 3D printing device. The 3D printing device includes a frame 110, a tool head, and a cutting assembly. The cutting assembly is disposed on the tool head, and the tool head is movably mounted on the frame 110. The cutter triggering device 600 includes a base 610, a triggering assembly 620, and a drive assembly 630. The triggering assembly 620 includes a trigger element 621, which is rotatably connected to the base 610 about a rotation axis that forms an angle with its center line. The trigger element 621 has an initial position and a working position. In the initial position, the trigger element 621 is located outside the movement space of the tool head. In the working position, the trigger element 621 is at least partially located in the movement space, perpendicular to the Y-axis direction, and located on a plane parallel to the XY plane of the 3D printing device, for triggering the cutting assembly to cut material. In this embodiment, the drive assembly 630 includes a drive motor, referred to as the second drive motor, which is mounted on the base 610 or the frame 110. One end of the trigger 621 is connected to the drive shaft of the second drive motor and is rotatably mounted on the base 610 so as to drive the trigger 621 to rotate through the second drive motor.

[0138] In the above embodiments, the drive component 630 is equipped with a second drive motor, which drives the trigger 621 to rotate, thereby further reducing the size of the cutter trigger device 600.

[0139] As shown in Figures 1-3 and 14, the frame 110 can be a square frame 110, including a rear side 111 arranged opposite to each other, a side side 113 connected to both ends of the rear side 111, and a front side 115 opposite to the rear side 111 and connecting the two side side 113. That is, the rear side 111, one side side 113, the front side 115 and the other side side 113 are connected end to end in sequence. The XY motion mechanism includes an X-axis slide rail, an X-axis slider, a Y-axis slide rail 125, and a Y-axis slider 126. Y-axis slide rails 125 are mounted on each side 113, and Y-axis sliders 126 are slidably mounted on each Y-axis slide rail 125. Both ends of the X-axis slide rail are connected to the Y-axis sliders 126 on both sides. The X-axis slider is slidably mounted on the X-axis slider, and the tool head is connected to the X-axis slider. Driven by a first drive motor, the tool head moves along the X-axis and Y-axis directions through the sliding of the X-axis slider and the Y-axis slider 126, thus printing on the printing panel 230. The first drive motor is mounted on the rear 111 and can synchronously drive the X-axis slider and the Y-axis slider.

[0140] In this embodiment, the cutter trigger device 600 can be installed at any position on the side 113. In some embodiments, the nozzle assembly 400 and the trash can 500 of the 3D printing equipment are located near the rear 111. In order to further improve the space utilization of the entire equipment, the cutter trigger device 600 is preferably located near the rear of the side 113. Of course, only one side 113 can be equipped with the cutter trigger device 600, or both side 113 can be equipped with the cutter trigger device 600 respectively. In the projection of the X-axis direction, the cutter trigger device 600 is basically located between the printing panel 230 and the first drive motor 121.

[0141] Specifically, the trigger 621 has a trigger end 6211 and a connecting end. It is rotatably set relative to the base 610 at the connecting end. Within the rotation stroke of the trigger 621, it has an initial position. At this position, the trigger 621 is close to the side edge 113 of the frame 110, completely outside the movement space of the tool head, and of course, also outside the space of the printing panel 230 on the side edge 113. When the trigger 621 rotates to the working position, the center line of the trigger 621 is perpendicular to the Y-axis slide rail, that is, parallel to the X-axis slide rail. The tool head moves along the X-axis slide rail toward the trigger 621, and the cutting component on it collides with the trigger end 6211 of the trigger 621, thereby pushing the cutting component to cut the material through the trigger 621.

[0142] In some embodiments, the connecting end of the trigger 621 is directly rotatably connected to the second drive motor. In a preferred embodiment, the trigger 621 includes a rod 6212 and a transmission component 6213. The transmission component 6213 includes a rotating part 6213a, which is rotatably mounted on the base 610. Specifically, it can be rotatably mounted on the base 610 via a rotating shaft. For example, the rotating shaft can be locked to the base 610, and the rotating part 6213a is sleeved on the rotating shaft. When the base 610 includes a base plate 611, it can be rotatably mounted on the base plate 611. The drive shaft of the second drive motor is tractively connected to the rotating part 6213a, that is, the drive shaft of the second drive motor can be inserted into the rotating part 6213a to transmit the driving force of the second drive motor to the rotating part 6213a. The rotating part 6213a can be an annular structure, and the drive shaft is directly inserted into the central hole of the annular structure. Specifically, it can be connected by a key or an interference fit. By setting the trigger 621 as a rod 6212 and a rotating part 6213, the driving force of the second drive motor will not directly act on the rod 6212 that directly abuts against the cutting assembly, thus avoiding deformation of the rod 6212. Moreover, this split structure reduces the processing difficulty of the trigger 621 and facilitates the assembly of the entire cutting trigger device 600.

[0143] The rod 6212 can be fixedly connected or movably connected. In a preferred embodiment, the rod 6212 is slidably mounted on the rotating part 6213a along its centerline. That is, the rod 6212 can slide relative to the rotation axis of the trigger 621 (specifically, the rotation axis of the rotating part 6213a). Specifically, in the working position, a buffer gap is left between the rod 6212 and the side part 113 along its centerline direction, and under the action of the cutting assembly, it can cross the buffer gap and abut against the rear part 111. Referring to Figures 16 and 17, which are schematic diagrams of the trigger 621 in the working position, when the rod 6212 is not subjected to external force, although it has rotated to the working position, a buffer gap is still left between it and the rear part 111, as shown in Figure 16. That is, there is a distance between the two, and they will not contact each other, let alone... When the rod 6212 is subjected to the pushing force of the cutting assembly, the rod 6212 slides relative to the rotating part towards the rear side 111 until it abuts against the rear side 111 or the base 610, as shown in Figure 17. The end of the rod 6212 away from the trigger end 6211 abuts against the rear side 111, thereby transmitting the pushing force of the cutting assembly to the frame 110. Therefore, it is possible to avoid excessive force on the rotating part 6213a and the base 610, thereby improving the reliability of the entire cutter triggering device.

[0144] Preferably, the rod 6212 and the rotating part 6213a are offset in the direction of the rotation axis of the trigger 621. When the cutter triggering device is installed on the side part 113, the rod 6212 is located below the rotating part 6213a in the projection along the Y-axis direction. In embodiments where the base 610 has a U-shaped structure, more preferably, the rod 6212 extends beyond the first side plate 612. In this way, the height of the cutter triggering device 600 can be further reduced, facilitating the manufacturing and assembly of components.

[0145] The sliding of the rod 6212 relative to the rotating part 6213a can be achieved in various ways. In one embodiment, the rod 6212 slides through a sleeve structure. Specifically, the transmission member 6213 also includes a sleeve part 6213b, as shown in Figure 12. The rotating part 6213a is connected to one end of the sleeve part 6213b, and the rotating part 6213a can be located radially outside the sleeve part 6213b. The rod 6212 is slidably inserted into the sleeve part 6213b. In the working position, the rod 6212 can move relative to the sleeve part 6213b to abut against the frame 110 or base 610 of the 3D printing equipment. This structure avoids single-point support of the rod 6212, improves sliding stability, and prevents rod deformation. In particular, it ensures the structural stability of the rod when subjected to the resistance force of the cutting assembly. Furthermore, in this way, the supporting force of the sliding of the rod 6212 acts on the sleeve part 6213b and is then transmitted to the rotating part 6213a, which also improves the reliability of the entire device.

[0146] Preferably, the sleeve portion 6213b is provided with a limiting hole penetrating its cylinder wall; the rod body 6212 is provided with a limiting groove 6212a; the trigger member 621 also includes a limiting member 6216, which is inserted into the limiting hole and one end extends into the limiting groove 6212a. Specifically, the limiting groove 6212a can be a strip groove, the extension direction of which is consistent with the center line of the rod 6212. When the rod 6212 slides relative to the sleeve 6213b, the limiting member 6216 slides on the limiting groove 6212a. When the limiting member 6216 slides to both ends of the limiting groove 6212a, it can restrict the sliding of the rod 6212 relative to the sleeve 6213b, thereby preventing the rod 6212 from detaching from the sleeve 6213b and causing deformation of the frame 110 or the base 610 when the cutting assembly and the trigger end 6211 push against each other. In some embodiments, the sliding limit between the rod 6212 and the sleeve portion 6213b is achieved by a stop step surface. Specifically, the rod 6212 is provided with a stop step surface, which faces the rotating portion 6213a and can be positioned opposite to the end of the sleeve portion 6213b away from the rotating portion 6213a. In the working position, when the cutting assembly does not push against the rod 6212, there is a certain distance between the stop step surface and the sleeve portion 6213b, that is, the stop step surface is located on the side of the sleeve portion 6213b away from the same side side 113. When the cutting assembly pushes against the rod 6212, the stop step surface moves towards the sleeve portion 6213b as the rod 6212 slides. When the rod 6212 contacts the side side 113 or the base 610, the stop step surface abuts against the sleeve portion 6213b, thereby preventing the rod 6212 from continuing to slide.

[0147] For example, the rod 6212 can slide through the cooperation of the slide rail and the slider. The cutter triggering device 600 also includes a slider shaft, and the rotating part 6213a is rotatably mounted on the base 610 through the slider shaft. Correspondingly, the rod 6212 is provided with a strip hole, the extension direction of which is consistent with the center line of the rod 6212, and it slides with the slider shaft. Specifically, the base 610 is provided with a locking hole, and the slider shaft includes a locking section, a rotating shaft section, a sliding section, and a limiting section arranged in sequence. The slider shaft passes through the strip hole and the center hole of the rotating part 6213a in sequence. The locking section is threadedly locked to the locking hole. The rotating section serves as the rotating shaft of the rotating part 6213a. The sliding section slides with the strip hole. The limiting section is located on the side of the strip hole away from the rotating part 6213a, projected along the axis of the rotating shaft section, and at least part of the limiting section is located outside the strip hole. In this embodiment, the rotating shaft is directly reused as a slider that cooperates with the rod 6212, which can save the number of parts, reduce the cost of the product, and facilitate assembly.

[0148] Furthermore, a reset element is provided between the rod 6212 and the sleeve portion 6213b so that the rod 6212 can return to its original position after the cutting assembly is separated from the rod 6212. Specifically, the reset element can be a return spring 6217.

[0149]

Example 3

[0150] This application also provides a cutter triggering device 600 for a 3D printing device. The 3D printing device includes a frame 110, an XY motion mechanism, a tool head, and a cutting assembly. The XY motion mechanism is mounted on the frame 110, the tool head is movably set relative to the frame 110 through the XY motion mechanism, and the cutting assembly is set on the tool head. The cutter triggering device 600 includes a base 610, a triggering assembly 620, and a drive assembly 630. The base 610 is mounted on the frame 110. The trigger assembly 620 includes a trigger element 621, which includes a rod 6212 and a transmission element 6213. The transmission element 6213 includes a rotating part 6213a, which is rotatably connected to the base 610. The rod 6212 is slidably connected to the rotating part 6213a along its centerline, and a reset element is provided between them. The trigger element 621 has an initial position and a working position. In the initial position, the rod 6212 is located outside the movement space of the tool head. In the working position, the rod 6212 is at least partially located in the movement space, used to trigger the cutting assembly to cut material. The rod 6212 can slide against the base 610 or the frame 110 by the push of the cutting assembly, and the reset element is in a deformed state. The drive assembly 630 is mounted on the base 610 and is used to drive the trigger element 621 to rotate.

[0151] The frame 110 of the 3D printing equipment can be a square frame 110, including a rear side 111 that is arranged opposite to each other, a side side 113 connected to both ends of the rear side 111, and a front side 115 that is opposite to the rear side 111 and connects the two side side 113, that is, the rear side 111, one side side 113, the front side 115 and the other side side 113 are connected end to end in sequence. The XY motion mechanism includes an X-axis slide rail, an X-axis slider, a Y-axis slide rail 125, and a Y-axis slider 126. Y-axis slide rails 125 are mounted on each side 113, and Y-axis sliders 126 are slidably mounted on each Y-axis slide rail 125. Both ends of the X-axis slide rail are connected to the Y-axis sliders 126 on both sides. The X-axis slider is slidably mounted on the X-axis slider, and the tool head is connected to the X-axis slider. Driven by a first drive motor, the tool head moves along the X-axis and Y-axis directions through the sliding of the X-axis slider and the Y-axis slider 126, thus printing on the printing panel 230. The first drive motor is mounted on the rear 111 and can synchronously drive the X-axis and Y-axis sliders. The nozzle assembly 400 and the waste bin 500 of the 3D printing equipment are positioned near the rear 111. The cutter trigger device 600 can be installed on only one side 113, or the cutter trigger device 600 can be installed on both side 113 respectively. In the projection of the X-axis direction, the cutter trigger device 600 is basically located between the printing panel 230 and the first drive motor 121.

[0152] Referring to Figures 4-13, the trigger 621 has a trigger end 6211 and a connecting end. It is rotatably set relative to the base 610 at the connecting end. Within the rotation stroke of the trigger 621, it has an initial position, as shown in Figures 3 and 4, where the trigger is completely outside the movement space of the tool head and also outside the space of the printing panel 230 on the side 113. When the trigger 621 rotates to the working position, as shown in Figure 5, the trigger 621 can rotate from the initial position toward the inside of the frame 110, i.e., rotate in the first rotation direction to the working position. At this time, the center line of the trigger 621 is perpendicular to the Y-axis slide rail, i.e., parallel to the X-axis slide rail. The tool head moves toward the trigger 621 along the X-axis slide rail, and the cutting assembly on it collides with the trigger end 6211 of the trigger 621, thereby pushing the cutting assembly to cut the material through the trigger 621. In this design, the rod 6212 of the trigger 621 is slidably disposed relative to the rotating part 6213a. In the initial position, under the action of the reset member, the trigger end 6211 of the rod 6212 is far from the rotation axis of the rotating part 6213a. When the trigger 621 rotates to the working position, before the cutting assembly pushes against the trigger end 6211 of the rod 6212, a buffer gap exists between the rod 6212 and the frame 110 (specifically the side part 113) or the first side plate 611 of the base 610 along its centerline direction. When the cutting assembly pushes against the trigger end 6211, the rod 6212 slides, allowing it to cross the buffer gap and abut against the frame 110 or the base 610. Figures 16 and 17 are schematic diagrams of the trigger 621 in the working position. When the rod 6212 is not subjected to the force of the cutting assembly, although it has rotated to the working position, there is still a buffer gap between it and the rear part 111, as shown in Figure 16. That is, there is a distance between the two, and they will not contact or abut against each other. When the rod 6212 is subjected to the pushing force of the cutting assembly, the rod 6212 slides relative to the rotating part towards the rear part 111 until it abuts against the rear part 111, as shown in Figure 17. The end of the rod 6212 away from the trigger end 6211 abuts against the rear part 111, thereby transmitting the pushing force of the cutting assembly to the frame 110. When the external force of the cutting assembly disappears, the rod 6212 can return to a position where the trigger end 6211 is far from the rotating part 6213a under the action of the reset member.

[0153] The cutting trigger device 600 of this application has a rotating structure, which reduces the space occupied by the entire cutting trigger device 600 on the internal space of the frame 110. Especially when the trigger element is in the initial position and no cutting is required, it can greatly increase the travel of the tool head in the X-axis direction, thus maintaining a small overall size even with a large travel requirement. At the same time, this application also sets the rod 6212 as a sliding structure. When the trigger element 621 works with the cutting assembly to cut the material, it can transfer the force of the cutting assembly to the base 610 or the frame, avoiding excessive force on the rotating part 6213a, thereby improving the reliability and stability of the entire cutting trigger device.

[0154] The aforementioned reset component can be a return spring 6217, specifically a cylindrical spring; the reset component can also be an elastic component, such as an elastic plastic component.

[0155] The sliding of the rod 6212 relative to the rotating part 6213a can be achieved in various ways. In one embodiment, the rod 6212 slides through a sleeve structure. Specifically, the transmission member 6213 also includes a sleeve part 6213b, as shown in Figure 12. The rotating part 6213a is connected to one end of the sleeve part 6213b, and the rotating part 6213a and the sleeve part 6213b can be misaligned in the direction of the rotation axis of the rotating part 6213a. Specifically, the rotating part 6213a can be located radially outside the sleeve part 6213b. The rod 6212 is slidably inserted into the sleeve part 6213b, and a reset member is disposed between the sleeve part 6213b and the rod 6212. In the working position, the rod 6212 can move relative to the sleeve part 6213b to abut against the frame 110 or base 610 of the 3D printing equipment. This structure avoids single-point support of the rod 6212, improves sliding stability, and prevents rod deformation. In particular, it ensures the structural stability of the rod when subjected to the resistance force of the cutting assembly. Furthermore, in this way, the supporting force of the sliding of the rod 6212 acts on the sleeve part 6213b and is then transmitted to the rotating part 6213a, which also improves the reliability of the entire device.

[0156] In this embodiment, limiting surfaces can be provided on the rod 6212 and the sleeve 6213b respectively. The two limiting surfaces are arranged facing each other along the centerline of the rod 6212, and the reset member is disposed between the two limiting surfaces. For example, a first stepped surface can be provided on the outer peripheral wall of the rod 6212, and a second stepped surface can be provided on the inner peripheral wall of the sleeve 6213b. The first and second stepped surfaces are arranged opposite each other in the direction of the centerline of the rod 6212. The reset member can be sleeved on the rod 6212 and located between the two stepped surfaces. By using this limiting surface method, the reset member is limited, and the force is applied to the reset member by changing the distance between the two limiting surfaces, making the overall dimensions of the trigger 621, especially the radial dimension, smaller. Of course, protruding structures can also be provided on the rod 6212 and the sleeve 6213b respectively, and the two ends of the reset member are connected to the two protruding structures respectively to fix the reset member and apply force.

[0157] Preferably, the sleeve portion 6213b is provided with a limiting hole penetrating its cylinder wall, as shown in Figure 14, 6213e; the rod body 6212 is provided with a limiting groove 6212a, as shown in Figure 15; the trigger member 621 also includes a limiting member 6216, as shown in Figure 12, the limiting member 6216 is inserted into the limiting hole, and one end extends into the limiting groove 6212a. Specifically, the limiting groove 6212a can be a strip groove, the extension direction of which is consistent with the center line of the rod 6212. When the rod 6212 slides relative to the sleeve 6213b, the limiting member 6216 slides on the limiting groove 6212a. When the limiting member 6216 slides to both ends of the limiting groove 6212a, it can restrict the sliding of the rod 6212 relative to the sleeve 6213b, thereby preventing the rod 6212 from detaching from the sleeve 6213b and causing deformation of the frame 110 or the base 610 when the cutting assembly and the trigger end 6211 push against each other.

[0158] In another embodiment, the sliding limit between the rod 6212 and the sleeve portion 6213b is achieved by a stop step surface. Specifically, the rod 6212 is provided with a stop step surface facing the rotating portion 6213a and can be positioned opposite to the end of the sleeve portion 6213b away from the rotating portion 6213a. In the working position, when the cutting assembly does not push against the rod 6212, there is a certain distance between the stop step surface and the sleeve portion 6213b, that is, the stop step surface is located on the side of the sleeve portion 6213b away from the same side side 113. When the cutting assembly pushes against the rod 6212, the stop step surface moves towards the sleeve portion 6213b as the rod 6212 slides. When the rod 6212 contacts the side side 113 or the base 610, the stop step surface abuts against the sleeve portion 6213b, thereby preventing the rod 6212 from continuing to slide.

[0159] In some embodiments, the rod 6212 can slide through the cooperation of a slide rail and a slider. The cutter triggering device 600 also includes a slider shaft, and the rotating part 6213a is rotatably mounted on the base 610 through the slider shaft. Correspondingly, the rod 6212 is provided with a strip-shaped hole, the extension direction of which is consistent with the center line of the rod 6212, and it slides with the slider shaft. Specifically, in the direction of the rotation axis of the rotating part 6213a, the rotating part 6213a is offset from the rod 6212; the base 610 is provided with a locking hole, and the slider shaft includes a locking section, a rotating shaft section, a sliding section, and a limiting section arranged in sequence. The slider shaft passes through the strip-shaped hole and the center hole of the rotating part 6213a in sequence, and the locking section is threadedly locked to the locking hole; the rotating section serves as the rotating shaft of the rotating part 6213a, the sliding section slides with the strip-shaped hole, and the limiting section is located on the side of the strip-shaped hole away from the rotating part 6213a, projected along the axis of the rotating shaft section, and at least part of the limiting section is located outside the strip-shaped hole. In this embodiment, the rotating shaft is directly reused as a slider that cooperates with the rod 6212, which can save the number of parts, reduce the cost of the product, and facilitate assembly.

[0160] Referring to Figures 4-15, the drive assembly 630 includes a trigger rack 631, a drive gear 632, and a first transmission mechanism. The trigger rack 631 is slidably mounted on the base 610, and the drive gear 632 is rotatably mounted on the base 610 and meshes with the trigger rack 631. The trigger member 621 has meshing teeth at least partially provided on its rotation axis. Specifically, the rotating part 6213a has an annular structure, and at least a portion of its outer circumferential surface is provided with meshing teeth. The meshing teeth are driven and engaged with the drive gear 632 through the first transmission mechanism. As its name suggests, the trigger rack 631 is triggered to slide, ultimately driving the cutter to be triggered. The movement of the trigger rack 631 after being triggered is transmitted through the drive gear 632 meshing with it. The drive gear 632 drives the meshing teeth on the trigger member 621 to rotate through the first transmission mechanism. The rotation of the meshing teeth drives the trigger member 631 to rotate, thereby realizing the rotation of the trigger member 621 from the initial position to the working position.

[0161] In one embodiment, the first transmission mechanism includes a drive rack 633, which is slidably mounted on the base 610 in a direction parallel to the trigger rack 631, and is connected to the trigger rack 631 via a drive gear 632. The meshing teeth on the trigger 631 mesh with the drive rack 633. As shown in Figure 4, the drive rack 633 and the trigger rack 631 are slidably mounted on the base 610, arranged in parallel, and opposite each other in the X-axis direction. Each of their opposite sides has a drive tooth 632. The drive gear 632 is located between them and meshes with the drive teeth on both the drive rack 633 and the trigger rack 631. The rotating part 6213a has an annular structure, and at least a portion of its outer circumference has meshing teeth that mesh with the drive teeth. That is, the meshing teeth on the trigger 621 mesh with the drive teeth on the drive rack 633. Thus, when the trigger rack 631 is driven to slide, the transmission is achieved sequentially through the trigger rack 631, the drive gear 632, the drive rack 633, and the meshing teeth. Finally, the trigger is driven to rotate from the initial position to the working position. Using this rack and gear drive method can further reduce the size of the entire cutter triggering device 600.

[0162] Preferably, the drive rack 633 is closer to the frame 110 than the trigger rack 631, that is, the trigger rack 631 is located on the side of the drive rack 633 away from the frame 110 (specifically the side portion 113). The trigger rack 631 and the trigger assembly 620 can be that the trigger member 621 is located on the same side of the drive rack 633, that is, both are located on the same side of the drive rack 633 away from the side portion 113. In the direction of the rotation axis of the rotating part 6213a, the rod 6212 is set beyond the drive rack 633. In the working position, the trigger end 6211 of the rod 6212 is located on the side where the trigger rack 631 is located. When the triggering device 600 is installed on the frame, the rod 6212 is located below and the drive rack 633 is located above. In this way, when the trigger 621 rotates, especially when it rotates to the working position, the trigger 621 can utilize the width of the drive rack 633 to further reduce the space occupied by the cutter trigger assembly in the X-axis, thereby increasing the stroke of the tool head in the X-axis direction, which is conducive to miniaturization.

[0163] Specifically, in the direction of the Y-axis slide rail 125, the drive gear 632 and the trigger rack 631 are basically located on the side of the drive rack 631 closer to the rear side 111. The trigger component 620, in its initial position, is arranged side by side with the drive gear 632 and is located on the side of the drive gear 632 away from the rear side 111. Referring again to Figure 3, when the trigger component 621 is in its initial position, the trigger rack 631 and the trigger component 620 are located on the same side of the drive rack 633. Specifically, both are located on the side of the drive rack 633 where the drive teeth are located, and the projections of the trigger rack 631 and the trigger component 620 in the X-axis direction do not coincide. The trigger component 620 is located on the side of the drive gear 632 away from the rear side 111, that is, the drive gear 632 is closer to the rear side 111 than the trigger component 620, and the trigger component 620 is also located on the side of the trigger rack 631 away from the rear side 111. This approach reduces the space occupied by the cutting trigger device in the X-axis direction, and within the same sliding stroke of the trigger rack 631, the cutting trigger device 600 has the smallest size in the Y-axis direction, thereby further reducing the space occupied by the cutting trigger device in the Y-axis, and thus increasing the travel stroke of the tool head in both the X and Y axes. Of course, in some embodiments, the trigger element 621 and the trigger rack 631 can also be located on different sides of the drive rack 633, and the trigger assembly 621 and the trigger rack 631 can also be arranged side-by-side in the Y-axis direction.

[0164] The base 610 includes a base plate 611, a first side plate 612, and a second side plate 613 disposed opposite to each other, as shown in FIG11. The first side plate 612 and the second side plate 613 are connected to the same side of the base plate 611 and are spaced apart, thereby forming a U-shaped structure with the first side plate 612, the second side plate 613, and the base plate 611 to improve the structural strength of the base 610. In this embodiment, the drive rack 633 is disposed against the inner side of the first side plate 612; the trigger rack 631 is disposed near the second side plate 613; the rotating part 6213a is rotatably connected to the base plate 611; and the trigger member 621 is rotatably connected to the base plate 611. The second side plate 613 has a notch at one end near the rotating part 6213a, so that the area corresponding to the notch on the base plate 611 forms the rotation space for the trigger member 621. In other words, the second side plate 613 has a notch on the side near the trigger assembly 620, which is a clearance space. This creates a space for the rotation of the trigger member 621, thereby further reducing the size of the cutter trigger device in the X-axis direction.

[0165] Furthermore, the base 610 also includes a surrounding plate 617 connected to it. The surrounding plate 617 is located between the first side plate 612 and the second side plate 613, and is located on the same side of the base plate 611 as the first side plate 612. Specifically, the surrounding plate 617 is arranged along the edge of the base plate 611, and one end can be connected to one end of the first side plate 612 to better increase the strength of the base 610.

[0166] In the direction of the rotation axis of the rotating part 6213a, the rod 6212 extends beyond the first side plate 612 and faces away from the base plate 611; the side of the first side plate 612 facing away from the base plate 611 overlaps with the frame 110, and the opening of the U-shaped structure faces downward. The overlap of the first side plate 612 increases the reliability of the cutter triggering device 600 installation, and the downward-facing U-shaped opening provides some coverage for the triggering assembly 610 and the drive assembly 620, preventing debris from falling into the gears, racks, and other structural components; simultaneously, the open surface of the U-shaped structure facilitates the installation of the various components of the cutter triggering device 600. Of course, the opening of the U-shaped structure can also face upward.

[0167]

Example 4

[0168] This application also provides a cutter triggering device 600 for a 3D printing device. The 3D printing device includes a tool head 700 and a cutting assembly. The cutting assembly is disposed on the tool head 700. The tool head 700 operates by moving in the X-axis and Y-axis directions of the 3D printing device. As shown in Figures 4-15, the cutter triggering device 600 includes a base 610, a triggering assembly 620, and a driving assembly 630.

[0169] The triggering assembly 620 includes a trigger member 621, which is rotatably connected to the base 610 about a rotation axis that forms an angle with its center line. The trigger member 621 has an initial position and a working position. In the initial position, the trigger member 621 is located outside the movement space of the tool head 700 and is parallel to the Y-axis direction. In the working position, the trigger member 621 is at least partially located in the movement space and is perpendicular to the Y-axis direction, for triggering the cutting assembly to cut the material.

[0170] The drive assembly 630 is mounted on the base 610 and is used to drive the trigger 621 to rotate.

[0171] For 3D printing equipment, a cutting assembly (including a cutter) is usually set in the tool head 700 to cut the 3D printing material. The cutter in this application is triggered by the cutter triggering device 600 with the above-mentioned specific structure. Specifically, it is triggered by the trigger member 621 in the triggering assembly 620 of the cutter triggering device 600.

[0172] In the cutter triggering device 600 of this application, when the trigger 621 is in the initial position (at which time the cutter is not triggered and obviously does not work), the trigger 621 is located outside the movement space of the tool head 700 and parallel to the Y-axis direction. Therefore, the trigger 621 does not occupy the movement space of the tool head 700. This makes the cutter triggering device 600 effectively save the internal space of the 3D printing equipment and significantly increase the movement space of the tool head 700. It is a significant innovation and improvement compared to the existing cutter triggering device 600 in the 3D printing equipment (which occupies the movement space of the tool head 700 even in the initial position).

[0173] When the trigger 621 is in the working position, it needs to contact the cutter to trigger it. At this time, the trigger 621 will be at least partially located in the movement space of the tool head 700 to trigger the cutting assembly to cut the material. The transition between the initial position and the working position of the trigger 621 is achieved by the drive assembly 630 installed on the base 610. The preferred structural form of the drive assembly 630 will be described later.

[0174] Preferably, the rotation axis of the trigger 621 forms an acute angle with the center line.

[0175] Alternatively, preferably, the rotation axis is perpendicular to the center line of the trigger 621.

[0176] By using the two different settings for the relative relationship between the rotation axis of the trigger 621 and its center line, the space occupied by the 3D printing equipment on the Z-axis (i.e., the axis in the height direction) can be significantly saved, further optimizing the overall structural form of the 3D printing equipment.

[0177] Preferably, the 3D printing equipment includes a frame 110 and an XY motion mechanism, wherein the tool head 700 is movably mounted on the frame 110 via the XY motion mechanism; the rotation axis of the trigger 621 is perpendicular to the XY plane of the XY motion mechanism.

[0178] With the above settings, the tool head 700 can be conveniently moved along the X and Y axes of the 3D printing equipment by the movement of the XY motion mechanism. The rotation axis of the trigger 621 is perpendicular to the XY plane, which saves space on the Z axis and facilitates the setting and positioning of the trigger 621.

[0179] Preferably, the drive assembly 630 includes a trigger rack 631, a drive gear 632, and a first transmission mechanism. The trigger rack 631 is slidably mounted on the base 610, and the drive gear 632 is rotatably mounted on the base 610 and meshes with the trigger rack 631.

[0180] The trigger 621 is provided with meshing teeth at the rotation axis, and the meshing teeth are driven to engage with the drive gear 632 through the first transmission mechanism.

[0181] As the name suggests, the trigger rack 631 is triggered to drive the cutter. The movement of the trigger rack 631 after being triggered is transmitted through the drive gear 632 meshing with it. The drive gear 632 drives the first transmission mechanism to drive the meshing teeth to rotate. The rotation of the meshing teeth causes the trigger element 621 to rotate from the initial position to the working position.

[0182] Preferably, the first transmission mechanism includes an odd number of first transmission gears that mesh with each other in sequence. Among the odd number of meshing first transmission gears, the two most distant first transmission gears mesh with the meshing teeth on the drive gear 632 and the trigger 621, respectively.

[0183] By transmitting power between the meshing teeth of the drive gear 632 and the trigger 621 through an odd number of meshing first transmission gears, the meshing teeth can eventually rotate in the desired direction of rotation, thus smoothly enabling the trigger 621 to rotate from the initial position to the working position.

[0184] Preferably, the first transmission mechanism includes a drive rack 633, which is slidably mounted on the base 610 in a direction parallel to the trigger rack 631, and is connected to the trigger rack 631 via the drive gear 632.

[0185] The meshing teeth on the trigger 621 mesh with the drive rack 633.

[0186] In this implementation, the transmission is achieved sequentially through the trigger rack 631, the drive gear 632, the drive rack 633, and the meshing teeth, and finally the trigger 621 is driven to rotate from the initial position to the working position.

[0187] Preferably, at least one of the trigger rack 631 and the drive rack 633 is a sliding rack, and the sliding rack is provided with a plurality of mounting holes 6311 along its sliding direction; the base 610 is provided with a sliding mounting groove 6111 corresponding to the position of the sliding rack;

[0188] The drive assembly 630 further includes a limiting member 6216, which can be selectively installed in at least one of the mounting holes 6311, with its end extending out of the mounting hole 6311 and slidingly engaging with the sliding mounting groove 6111 to adjust the sliding stroke and starting position of the sliding rack.

[0189] Preferably, the transmission end of the trigger 621 meshes with the drive rack 633. In the initial position, the trigger 621 and the drive rack 633 are arranged parallel to each other. The trigger end 6211 of the trigger 621 and the drive gear 632 are located on both sides of the transmission end, and the trigger rack 631 and the trigger 621 are located on the same side of the drive rack 633.

[0190] In the initial position, the trigger 621 is arranged parallel to the drive rack 633, which significantly reduces the space occupied by the trigger 621 in the movement space of the tool head 700. The two ends of the trigger 621 are the transmission end and the trigger end 6211, respectively. The transmission end meshes with the drive rack 633 and receives transmission from the drive rack 633; ​​the trigger end 6211 is used to trigger the cutting assembly.

[0191] Preferably, when projected along the rotation axis 623 of the trigger 621, the active space of the trigger 621 overlaps with the sliding stroke of the trigger rack 631.

[0192] With the above settings, the space occupied by the cutter triggering device 600 in the Y-axis direction can be significantly reduced. Of course, the overall structure of the 3D printing setup can also be reduced as a result.

[0193] Preferably, the 3D printing equipment includes a frame 110 and a Y-axis slider 126, wherein the Y-axis slider 126 is slidably mounted on the frame 110;

[0194] The base 610 is mounted on the frame 110. In the initial position, the center line of the trigger 621 is parallel to the Y-axis slide rail 125. In the working position, the center line of the trigger 621 is perpendicular to the Y-axis slide rail 125. The trigger rack 631 is at least partially located within the sliding stroke of the Y-axis slider 126, so as to drive the trigger rack 631 to move through the sliding of the Y-axis slider 126. Referring to Figure 2, a slider protrusion 1261 may be provided on the Y-axis slider 126, through which the trigger rack 631 is driven to move.

[0195] Preferably, the trigger rack 631 includes a rack portion 6312 and a trigger block 6313. The trigger block 6313 protrudes from the rack portion 6312 and is located within the stroke of the Y-axis slider 126. The Y-axis slider 126 drives the trigger rack 631 to move by triggering the trigger block 6313.

[0196] The trigger rack 631 meshes with the drive gear 632 through the rack portion 6312, and the rack portion 6312 is offset from the Y-axis slider 126 in the Z-axis direction, wherein the Z-axis direction is perpendicular to the XY plane of the tool head 700 movement.

[0197] With the above configuration, when the Y-axis slider 126 slides to its position, it contacts the trigger block 6313 on the trigger rack 631, applying power to the trigger block 6313. The trigger block 6313 then begins to move, driving the trigger rack 631 to move. Ultimately, this allows the trigger member 621 to switch between the initial position and the working position, triggering the cutting assembly to cut the material. Furthermore, the trigger block 6313 only requires a portion of the trigger rack 631 to protrude, which helps reduce the size of the triggering device. Moreover, by offsetting the rack portion 6312 and the Y-axis slider 126 in the Z-axis direction, the space utilization in the XY plane can be further improved.

[0198] Preferably, the trigger member 621 is provided with a first trigger protrusion 6214 protruding outward. In the working position, the first trigger protrusion 6214 is located on the side close to the drive gear 632 and within the sliding stroke of the Y-axis slider 126, so that the trigger member 621 can be rotated from the working position to the initial position by pushing the first trigger protrusion 6214 through the Y-axis slider 126.

[0199] The trigger 621 returns to its initial position from its working position by being pushed by the sliding of the Y-axis slider 126 through the first trigger protrusion 6214 on it. Therefore, in the working position of the trigger 621, the first trigger protrusion 6214 is positioned within the sliding stroke of the Y-axis slider 126.

[0200] Preferably, the trigger member 621 is further provided with a second trigger protrusion 6215, and the first trigger protrusion 6214 and the second trigger protrusion 6215 are symmetrically arranged about the center line of the trigger member 621.

[0201] The trigger 621 can return from its working position to its initial position by being pushed by the sliding Y-axis slider 126 through the second trigger protrusion 6215 on it. By setting the first trigger protrusion 6214 and the second trigger protrusion 6215, the same set of triggers 621 can be used when the cutter triggering device is set on both sides, thereby improving the versatility of the cutter triggering device.

[0202] Preferably, the first trigger protrusion 6214 and the second trigger protrusion 6215 each form a guide slope 6214a at two ends along the center line, and the free ends of the two guide slopes 6214a located on the same side of the center line are close to each other.

[0203] With the above-mentioned guide slope 6214a, the Y-axis slider 126 can move along the guide slope 6214a. Therefore, the contact surfaces of the Y-axis slider 126 with the first trigger protrusion 6214 and the second trigger protrusion 6215 are smooth, and the corresponding components will not be damaged due to hard collision.

[0204] Preferably, the sliding directions of the trigger rack 631 and the drive rack 633 relative to the base 610 are opposite, and during the process of the Y-axis slider 126 triggering the drive rack 633, it first passes the position of the trigger member 621 and then moves to the position of triggering the trigger rack 631.

[0205] With the above settings, the matching of the trigger 621 and the tool head 700 can be achieved more smoothly. Since the tool head 700 must have a thickness in the Y direction, and the cutter can be set in a higher position (at this time, the trigger block 6313 is naturally in a lower position), the Y-axis slider 126 needs to pass through the position of the cutter to contact and push the trigger block 6313.

[0206] Preferably, the trigger 621 includes a rod 6212 and a transmission member 6213 connected to each other. The transmission member 6213 includes a rotating part 6213a, which has an annular structure. At least a portion of its outer circumferential surface is provided with meshing teeth that mesh with the driving teeth. The rotating part 6213a is rotatably mounted on the base 610. The trigger 621 is rotatably connected to the base 610 through the rotating part 6213a.

[0207] By setting the trigger 621 to the above structural form, it is convenient to process and manufacture the trigger 621, and its function can be successfully realized.

[0208] Preferably, the rod 6212 and the rotating part 6213a are misaligned in the direction of the rotation axis 623.

[0209] Specifically, after the cutter triggering device 600 is installed, the rod 6212 is located below the rotating part 6213a.

[0210] In addition, mounting holes 6311 are respectively provided on the upper and lower end faces of the rotating part 6213a of the trigger member 621, and a through hole can be provided on the bottom surface of the mounting hole 6311; bearings are respectively installed in the mounting holes 6311, and the rotating part 6213a is rotatably connected to the base 610 through the mounting hole 6311 and the through hole by a locking member.

[0211] Preferably, the rod 6212 is slidably disposed relative to the transmission member 6213 along its centerline; in the working position, the rod 6212 slides away from the tool head 700 under the action of the cutting assembly and can abut against the base 610.

[0212] Specifically, the rod 6212 abuts against the base 610 in two ways: one is direct abutment, that is, the rod 6212 directly abuts against the base 610; the other is indirect abutment, in which the rod 6212 first abuts against the frame 110 of the 3D printing equipment, and the base 610 is installed on the frame 110, so the rod 6212 indirectly abuts against the base 610.

[0213] Preferably, the transmission component 6213 further includes a sleeve portion 6213b, the rotating portion 6213a is connected to one end of the sleeve portion 6213b, and the rod body 6212 is slidably inserted into the sleeve portion 6213b.

[0214] Alternatively, preferably, it further includes a sliding shaft, through which the rotating part 6213a is rotatably mounted to the base 610;

[0215] The rod 6212 is provided with a strip-shaped hole, the extension direction of which is consistent with the center line of the rod 6212 and slides with the slider shaft.

[0216] Both of the above implementation methods can reliably achieve a sliding connection between the rod 6212 and the transmission component 6213 with a simple structural form.

[0217] Preferably, it further includes a position detection mechanism, which is mounted on at least one of the base 610 and the trigger 621 to detect the rotational position of the trigger 621.

[0218] The position detection mechanism facilitates the detection of whether the trigger 621 has rotated into position, such as whether it has moved from the initial position to the working position.

[0219] Preferably, the position detection mechanism includes a magnet and a Hall sensor. In the region of the base 610 and the trigger 621 near the rotation axis, one is provided with a magnet and the other with a Hall sensor. In the working position, the magnet is opposite to the Hall sensor to detect that the trigger 621 has rotated to the working position.

[0220] Alternatively, preferably, the position detection mechanism includes a displacement switch and a detection structure. One of the trigger 621 and the base 610 is provided with a displacement switch, and the other is provided with a detection structure. When the trigger 621 rotates to the working position, the detection structure triggers the displacement switch.

[0221] Both of the above-mentioned position detection mechanisms with different structures can detect the position of the trigger 621 in a simple manner, and the detection results are accurate and reliable.

[0222] Preferably, the axis of rotation is parallel to the XY plane in which the tool head 700 moves.

[0223] In the above case, the rotation plane of the trigger 621 is in the YZ plane, providing another configuration possibility for the cutter trigger device 600.

[0224] Preferably, the transmission end of the trigger 621 is provided with meshing teeth; the drive assembly 630 includes a drive motor and a second transmission mechanism. The drive motor is mounted on the base 610 and engages with the meshing teeth of the trigger 621 through the second transmission mechanism to drive the trigger 621 to rotate.

[0225] Preferably, the second transmission mechanism includes a worm gear, which is slidably mounted on the base 610 and meshes with the meshing teeth; the drive motor drives the worm gear to slide.

[0226] In the above scenario, if the drive motor is a linear motor, then the output end of the linear motor is directly connected to the worm to drive the worm to slide; while when the drive motor is a rotary motor, the output shaft of the rotary motor is connected to a third transmission gear, which is connected to the worm.

[0227] Preferably, the centerline of the trigger 621 is parallel to the Y-axis in the initial position and parallel to the X-axis in the working position, wherein the Y-axis is the axis in which the X-axis system moves, and the X-axis is the axis in which the tool head 700 moves.

[0228] The above configuration facilitates the design and manufacture of the cutter triggering device 600, and also helps to further optimize and improve the overall miniaturization of the 3D printing equipment.

[0229] This application also provides a 3D printing device, including a frame 110, a tool head 700, a cutting assembly, and a cutting trigger device 600 as described above. The tool head 700 is movably mounted on the frame 110, the cutting assembly is disposed on the tool head 700, and the base 610 is mounted on the frame 110.

[0230] In the initial position, the trigger 621 is disposed adjacent to the frame 110 and located outside the movement space of the tool head 700; in the working position, the trigger 621 is at least partially located within the movement space of the tool head 700, and its trigger end 6211 is disposed opposite to the cutting assembly for triggering the cutting assembly to cut the material.

[0231] Since the cutting trigger device 600 provided in this application is adopted, the cutting trigger device 600 as a whole is miniaturized, so the 3D printing equipment can also be significantly miniaturized.

[0232]

Example 5

[0233] Referring to Figures 4-15, this embodiment provides a cutter triggering device 600 for a 3D printing device. The 3D printing device includes a tool head 700 and a cutting assembly, with the cutting assembly disposed on the tool head 700. The cutter triggering device 600 includes a base 610, a triggering assembly 620, and a driving assembly 630.

[0234] The base 610 is provided with a limiting groove 614, and a limiting ball 640 is installed in the limiting groove 614.

[0235] The triggering component 620 includes a trigger member 621, which has a standby groove 6218a and a working groove 6218b. The trigger member 621 is rotatably connected to the base 610. The trigger member 621 has an initial position and a working position. In the initial position, the trigger member 621 is located outside the movement space of the tool head 700, and the limiting ball 640 is limited and engaged with the standby groove 6218a. In the working position, the trigger member 621 is at least partially located in the movement space, and the limiting ball 640 is limited and engaged with the working groove 6218b, so as to trigger the cutting component to cut material through the trigger member 621.

[0236] The drive assembly 630 is mounted on the base 610 and is used to drive the trigger 621 to rotate.

[0237] For 3D printing equipment, a cutting assembly (including a cutter) is typically located on the tool head 700 to cut the 3D printing material. In this embodiment, the cutter is triggered by the cutter triggering device 600 with the specific structural form described above. Specifically, it is triggered by the trigger member 621 in the triggering assembly 620 of the cutter triggering device 600. When the trigger member 621 is in the initial position, the cutter is not triggered and does not work; when the trigger member 621 is in the working position, it contacts the cutter and triggers it, and the cutter begins to work.

[0238] Since the trigger 621 in the cutter triggering device 600 of this embodiment is located outside the movement space of the tool head 700 and parallel to the Y-axis direction when it is in the initial position, the trigger 621 does not occupy the movement space of the tool head 700. This makes the cutter triggering device 600 effectively save the internal space of the 3D printing equipment and significantly increase the movement space of the tool head 700.

[0239] By providing a standby groove 6218a and a working groove 6218b on the trigger element 621, and with the limiting ball 640 in the limiting groove 614 on the base 610 positioned in the standby groove 6218a and the working groove 6218b respectively, the trigger element 621 is securely positioned in each location. When triggered, the triggering force is concentrated, preventing the trigger element 621 from easily shaking. This fully ensures the reliability of the cutter triggering device 600 and improves the stability and reliability of the 3D printing equipment. Adjacent grooves are connected by a connecting groove 6218d.

[0240] Preferably, the trigger 621 includes a transmission component 6213 and a rod 6212 connected to each other. The transmission component 6213 includes a rotating part 6213a and a connecting plate 6213c. The rotating part 6213a is rotatably mounted on the base 610. The connecting plate 6213c is connected to the rotating part 6213a and is located on the side of the rotating part 6213a closer to the base 610. The standby groove 6218a and the working groove 6218b are both disposed on the connecting plate 6213c. Within the rotation stroke of the trigger 621, the limiting ball 640 is pressed against the connecting plate 6213c.

[0241] The trigger 621 is rotatably connected to the base 610 via the connector.

[0242] The trigger 621 triggers the cutting assembly via the rod 6212, while the connecting plate 6213c in its transmission component 6213 serves as the carrier for setting the standby groove 6218a and the working groove 6218b. During the rotation stroke of the trigger 621, the limiting ball 640 presses against the connecting plate 6213c. When it is located in the standby groove 6218a, the trigger 621 is not driven by the transmission and is in the initial position; when the limiting ball 640 is located in the working groove 6218b, the trigger 621 has been driven to the working position.

[0243] Preferably, in the direction of the rotation axis 623 of the rotating part 6213a, the rod 6212 is offset from the rotating part 6213a, and the rod 6212 is slidably disposed relative to the transmission member 6213 along its center line; in the working position, the rod 6212 slides away from the tool head 700 under the action of the cutting assembly, and can abut against the base 610 or the frame 110 of the 3D printing equipment.

[0244] By misaligning the rod 6212 with the rotating part 6213a, the internal space of the cutting trigger device 600 can be fully utilized, reducing the space occupied by the device itself and contributing to the miniaturization of the 3D printing equipment. When the trigger 621 is in the working position, the rod 6212 can slide to abut against the base 610 or the frame 110 of the 3D printing equipment, transmitting the force from the cutting assembly to the base 610 or the frame 110 of the 3D printing equipment. The rod 6212 does not need to bear a large force and can be made of materials such as plastic, eliminating the need for high-strength and high-cost metal materials.

[0245] Preferably, the transmission component 6213 further includes a sleeve portion 6213b, a rotating portion 6213a connected to one end of the sleeve portion 6213b, and a rod 6212 slidably inserted into the sleeve portion 6213b.

[0246] Alternatively, preferably, it also includes a slider shaft, and the rotating part 6213a is rotatably mounted on the base 610 via the slider shaft;

[0247] The rod 6212 is provided with a strip-shaped hole, the extension direction of which is consistent with the center line of the rod 6212, and it slides with the slider shaft.

[0248] The above are two ways to achieve the sliding fit between the rod 6212 and the transmission component 6213. For the design where the rod 6212 has a slotted hole, the base 610 can have a locking hole. The sliding shaft includes a locking section, a rotating shaft section, a sliding section, and a limiting section arranged sequentially. The sliding shaft passes through the slotted hole and the center hole of the rotating part 6213a sequentially. The locking section is threadedly locked to the locking hole. The rotating section serves as the rotating shaft 623 of the rotating part 6213a. The sliding section slides with the slotted hole. The limiting section is located on the side of the slotted hole away from the rotating part 6213a, projected along the axis of the rotating shaft section. At least part of the limiting section is located outside the slotted hole.

[0249] Preferably, the drive assembly 630 includes a trigger rack 631, a drive gear 632, and a first transmission mechanism. The trigger rack 631 is slidably mounted on the base 610, and the drive gear 632 is rotatably mounted on the base 610 and meshes with the trigger rack 631.

[0250] The outer periphery of the rotating part 6213a is provided with meshing teeth, which are driven to engage with the drive gear 632 through the first transmission mechanism.

[0251] As the name suggests, the trigger rack 631 is triggered to drive the material cutting component. The movement of the trigger rack 631 after being triggered is transmitted through the drive gear 632 meshing with it. The drive gear 632 drives the first transmission mechanism to drive the meshing teeth to rotate. The rotation of the meshing teeth causes the trigger element 621 to rotate from the initial position to the working position.

[0252] Preferably, the first transmission mechanism includes an odd number of first transmission gears that mesh with each other in sequence. Among the odd number of meshing first transmission gears, the two most distant first transmission gears mesh with the meshing teeth on the drive gear 632 and the trigger 621, respectively.

[0253] By transmitting power between the meshing teeth of the drive gear 632 and the trigger 621 through an odd number of meshing first transmission gears, the meshing teeth can eventually rotate in the desired direction of rotation, thus smoothly enabling the trigger 621 to rotate from the initial position to the working position.

[0254] Preferably, the first transmission mechanism includes a drive rack 633, which is slidably mounted on the base 610 in a direction parallel to the trigger rack 631, and is connected to the trigger rack 631 via the drive gear 632.

[0255] The meshing teeth on the rotating part 6213a mesh with the driving rack 633.

[0256] In this implementation, the transmission is achieved sequentially through the trigger rack 631, the drive gear 632, the drive rack 633, and the meshing teeth, and finally the trigger 621 is driven to rotate from the initial position to the working position.

[0257] Preferably, the center of the working groove 6218b forms a central surface with the rotation axis 623 of the rotating part 6213a; the connecting plate 6213c is disposed along the outer periphery of the rotating part 6213a, and two standby grooves 6218a are disposed thereon, and the two standby grooves 6218a are symmetrically disposed about the central surface.

[0258] The two symmetrically arranged standby grooves 6218a make the installation of the cutter trigger device 600 more flexible, expand the application range of the cutter trigger device 600, and save manufacturing costs. For example, the cutter trigger device 600 can be set on any side near the Y-axis slide rail 125. Especially when some printheads are dual printheads, the cutter trigger device 600 can be installed on the side of both Y-axis slide rails 125 at the same time.

[0259] Preferably, the connecting plate 6213c is further provided with a communicating groove 6218d; each standby groove 6218a is connected to the working groove 6218b through the communicating groove 6218d.

[0260] Specifically, the connecting groove 6218d can be an arc-shaped groove, which is arranged circumferentially along the rotating part 6213a.

[0261] Preferably, the cutter triggering device 600 further includes a reset torsion spring 650, which is movably mounted on the base 610, with one side relatively fixed relative to the base 610 and the other side being a free end;

[0262] Along the first rotational direction from the initial position to the working position, the free end is located outside the working position so that it can abut against the reset torsion spring 650 when the trigger 621 rotates to the working position.

[0263] If the trigger 621 is over-triggered (e.g., due to excessive external triggering force), the trigger 621 may rotate beyond its working position. Once it reaches a certain point, it will block the return torsion spring 650. After the external triggering force disappears, the trigger 621 can return to its working position under the action of the return torsion spring 650.

[0264] In this application, the direction in which the trigger 621 rotates from the initial position to the working position is denoted as the first rotation direction, i.e., the positive direction below; the direction in which it rotates from the working position to the initial position is denoted as the second rotation direction, i.e., the opposite direction below. The area swept by the trigger 621 as it rotates from the initial position to the working position is called the first region, and the area swept by the trigger 621 as it continues to rotate along the first direction from the working position is called the second region. In the free state of the return torsion spring 650, the free end is located outside the working position, i.e., in the second region.

[0265] Preferably, the trigger member 621 is provided with an abutment groove 6213d or an abutment protrusion; the free end of the reset torsion spring 650 is located within the stroke of the abutment groove 6213d or the abutment protrusion, so that when the trigger member 621 rotates to the outside of the working position along the first rotation direction, it abuts against the reset torsion spring 650 through the abutment groove 6213d or the abutment protrusion.

[0266] By setting the aforementioned abutment groove 6213d or abutment protrusion, the trigger 621 and the reset torsion spring 650 can form a reliable abutment. After the external triggering force disappears, the trigger 621 can smoothly return to the working position under the action of the reset torsion spring 650.

[0267] Preferably, the center and rotation axis of the limiting ball 640 are coplanar with the center line of the trigger 621 in the working position.

[0268] Therefore, when the cutting assembly is triggered, the force on the trigger 621 from the cutting assembly, the force on the limit ball 640, and the force on the rotating shaft 623 are coaxial, which enhances the force stability of the entire cutter triggering device 600.

[0269] Preferably, a compression spring is installed between the groove of the limiting ball 640 and the limiting ball 640.

[0270] By setting a compression spring, the limiting ball 640 can always be in contact with the connecting plate 6213c and the base 610 during the entire operation of the cutter triggering device 600, thereby making the relative sliding between the limiting ball 640 and the connecting plate 6213c more stable.

[0271]

Example 6

[0272] Referring to Figures 4-15, this embodiment provides a cutter triggering device 600 for a 3D printing device. The 3D printing device includes a tool head 700 and a cutting assembly, with the cutting assembly disposed on the tool head 700. The cutter triggering device 600 includes a base 610, a triggering assembly 620, a driving assembly 630, and a reset torsion spring 650.

[0273] The base 610 is provided with a limiting groove 614, and a limiting ball 640 is installed in the limiting groove 614.

[0274] The triggering assembly 620 includes a trigger member 621, which is provided with a standby groove 6218a, a working groove 6218b, and an over-rotation groove 6218c. The trigger member 621 is rotatably mounted on the base 610. Within its rotational stroke, the trigger member 621 is sequentially provided with an initial position, a working position, and an over-rotation position along a first rotational direction. In the initial position, the trigger member 621 is located outside the movement space of the tool head 700, and the limiting ball 640 engages with the standby groove 6218a for limiting engagement. In the working position, the trigger member 621 is at least partially located within the movement space, and the limiting ball 640 engages with the working limiting engagement to trigger the cutting assembly to cut material. In the over-rotation position, the limiting ball 640 engages with the over-rotation groove 6218c for limiting engagement, positioning the trigger member 621 at an over-rotation position exceeding the working position. The first rotational direction refers to the direction from the initial position to the working position with a minimum rotation angle.

[0275] The reset torsion spring 650 is movably mounted on the base 610, with its first side abutting against the base 610 or the drive assembly 630, and its second side located in the section of the rotational stroke of the trigger 621 along the first direction that exceeds the over-rotation position, so that when the trigger 621 rotates along the first direction to exceed the over-rotation position, it will return to the over-rotation position under the reset force of the reset torsion spring 650.

[0276] The drive assembly 630 is mounted on the base 610 and is used to drive the trigger 621 to rotate.

[0277] Since the trigger 621 in the cutter triggering device 600 of this embodiment is located outside the movement space of the tool head 700 and parallel to the Y-axis direction when it is in the initial position, the trigger 621 does not occupy the movement space of the tool head 700. This makes the cutter triggering device 600 effectively save the internal space of the 3D printing equipment and significantly increase the movement space of the tool head 700.

[0278] By providing a standby groove 6218a and a working groove 6218b on the trigger member 621, and with the limiting ball 640 in the limiting groove 614 on the base 610 positioned in the standby groove 6218a and the working groove 6218b respectively, the initial and working positions of the trigger member 621 are determined. This ensures that the trigger member 621 is securely positioned in each position, and the triggering force is concentrated when triggered, making it less prone to shaking. This fully guarantees the reliability of the cutter triggering device 600 and improves the stability and reliability of the 3D printing equipment.

[0279] Furthermore, this embodiment also provides an over-rotation groove 6218c on the trigger member 621. At the over-rotation position of the trigger member 621, the limiting ball 640 can cooperate with the over-rotation groove 6218c to position the trigger member 621 at the over-rotation position (which can be returned to the working position by external force later). The purpose of the reset torsion spring 650 is to provide a reset force after the rotation stroke of the trigger member 621 exceeds the over-rotation position, so that the trigger member 621 returns to the over-rotation position in the opposite direction, helping the cutter triggering device 600 return to the normal working state.

[0280] Preferably, the drive assembly 630 includes a drive rack 633, a trigger rack 631, and a drive gear 632. The drive rack 633 and the trigger rack 631 are arranged in parallel, and each of their opposite sides is provided with drive teeth. The drive rack 633 is slidably mounted on the base 610, and the trigger rack 631 is slidably mounted on the base 610. The drive gear 632 is meshed with the drive teeth on both the drive rack 633 and the trigger rack 631.

[0281] One end of the trigger 621 is engaged with the drive tooth so that the trigger 621 can be moved by the sliding of the trigger rack 631;

[0282] The reset torsion spring 650 is located on one side of the trigger rack 631 along its length, and the first side is fixed relative to the base 610 by abutting against the drive rack 633.

[0283] With the aforementioned configuration of the drive rack 633, trigger rack 631, and drive gear 632, the trigger rack 631, by sliding relative to the base 610, can drive the trigger element 621 to move from the initial position to the working position to trigger the cutting assembly. The reset torsion spring 650, with its first side fixed to the base 610 by abutting against the drive rack 633, can be reliably installed, ensuring its operational reliability. After the trigger element 621's rotational stroke exceeds the over-rotation position, a reliably resetting force is provided to return the trigger element 621 to the over-rotation position.

[0284] Preferably, the base 610 has a U-shaped structure, including a base plate 611, a first side plate 612, and a second side plate 613. The first side plate 612 and the second side plate 613 are arranged opposite to each other and connected to the same side of the base plate 611.

[0285] Therefore, the aforementioned drive rack 633, trigger rack 631, drive gear 632, and reset torsion spring 650 can all be installed inside the U-shaped structure to protect these components.

[0286] Preferably, the drive rack 633 and the trigger rack 631 are disposed inside the U-shaped structure and are respectively disposed close to the first side plate 612 and the second side plate 613; the reset torsion spring 650 is movably mounted on the base plate 611, with its first side abutting against the inner side of the first side plate 612; and the limiting ball 640 is disposed on the base plate 611.

[0287] Therefore, the drive rack 633, trigger rack 631, and return torsion spring 650 can be arranged in a reasonable manner so that they can work together without interfering with each other.

[0288] Preferably, the trigger 621, the limiting ball 640, and the reset torsion spring 650 are all located on the same side of the drive gear 632; the second side plate 613 has a notched corner on the side near the limiting ball 640 to prevent interference when the trigger 621 rotates.

[0289] This reduces the width of the U-shaped structure, i.e., reduces the distance between the first side plate 612 and the second side plate 613, because without this notch, the U-shaped structure would require a larger internal width for the trigger 621 to rotate.

[0290] Preferably, the base 610 further includes a bending plate 617, which is connected to the side of the base plate 611 away from the drive gear 632 and to the end of the first side plate 612; a limiting groove 614 is provided on the inner side of the bending plate 617.

[0291] The overall strength of the base 610 can be increased by the aforementioned bending plate 617. Furthermore, multiple reinforcing ribs can be provided on the base plate 611, the first side plate 612, and the second side plate 613 to further increase the strength of the base 610; recessed structures can also be provided on the base plate 611 and the first side plate 612 to reduce the overall weight of the base 610.

[0292] Preferably, the base 610 is provided with a limiting groove 614 and a limiting hole 6112, which extend along the length direction of the drive rack 633; ​​the cutter triggering device 600 also includes a limiting shaft, which is movably installed in the limiting groove 614 and the limiting hole 6112, and a reset torsion spring 650 is sleeved on the limiting shaft.

[0293] In the above manner, the reset torsion spring 650 is movably installed. In the free state, the limiting shaft is located at one end close to the trigger rack 631. After abutting against the trigger 621, it gradually moves away from the trigger rack 631. In this way, the force applied when squeezed is too large, and the impact during return to position is prevented after the external force disappears.

[0294] In addition, the cross section of the limiting shaft can be designed as a cross-shaped structure.

[0295] Preferably, the 3D printing equipment includes a frame 110 and a Y-axis slider 126, the Y-axis slider 126 being slidably mounted on the frame 110; the trigger member 621 includes a rod 6212 and a transmission member 6213, the transmission member 6213 including a sleeve portion 6213b, the rod 6212 being inserted into the sleeve portion 6213b; one end of the sleeve portion 6213b is rotatably mounted on the base 610 and meshes with the driving teeth of the drive rack 633; ​​the sleeve portion 6213b has a first trigger protrusion 6214 and a second trigger protrusion 6215 respectively on both radial sides.

[0296] In the initial position, both the first trigger protrusion 6214 and the second trigger protrusion 6215 are outside the travel of the Y-axis slider 126; in the working position, at least the first trigger protrusion 6214 is within the travel of the Y-axis slider 126; in the over-rotation position, at least the second trigger protrusion 6215 is within the travel of the Y-axis slider 126.

[0297] With the above settings, in the working position, the Y-axis slider 126 can move to contact the first trigger protrusion 6214, thereby pushing the trigger 621 from the working position back to the initial position; while in the over-rotation position, the Y-axis slider 126 can move to contact the second trigger protrusion 6215, thereby pushing the trigger 621 from the over-rotation position back to the working position.

[0298] Preferably, the transmission component 6213 further includes a rotating part 6213a connected to one end of the sleeve part 6213b. The rotating part 6213a is rotatably mounted on the base 610 to drive the sleeve and the rod 6212 to rotate. The outer periphery of the rotating part 6213a meshes with the drive teeth.

[0299] There is a clearance space between the drive gear 632 and the rotating part 6213a for the rod 6212 to rotate. When the rod 6212 is located in the clearance space, the reset torsion spring 650 abuts against the trigger member 621, and the Y-axis slider 126 can make the rod 6212 located in the clearance space by pushing against the second trigger protrusion 6215. In at least one position, the Y-axis slider 126 can pass over the second trigger protrusion 6215.

[0300] At this time, after the Y-axis slider 126 pushes against the second trigger protrusion 6215, the Y-axis slider 126 continues to move forward, and the trigger 621 changes position as it is pushed by the Y-axis. The second trigger protrusion 6215 is no longer within the movement stroke of the Y-axis slider 126, and the Y-axis slider 126 can pass over the second trigger protrusion 6215.

[0301] Preferably, the transmission member 6213 further includes a stop portion, which is disposed on the radially outer side of the sleeve portion 6213b. The stop portion is provided with a stop groove 6213d or a stop protrusion so that when the trigger member 621 rotates beyond the over-rotation position, the second side of the reset torsion spring 650 abuts against the stop groove 6213d or the stop protrusion.

[0302] Therefore, the return torsion spring 650 can reliably abut against the transmission component 6213.

[0303] Preferably, the center of the working groove 6218b forms a central plane with the rotation axis 623 of the trigger member 621; the trigger member 621 is provided with two standby grooves 6218a and two over-rotation grooves 6218c that are symmetrical about the central plane.

[0304] The two symmetrically arranged standby grooves 6218a make the installation of the cutter trigger device 600 more flexible, expand the application range of the cutter trigger device 600, and save manufacturing costs. For example, the cutter trigger device 600 can be set on any side near the Y-axis slide rail 125. Especially when some printheads are dual printheads, the cutter trigger device 600 can be installed on the sides of both Y-axis slide rails 125 at the same time.

[0305]

Example 7

[0306] Referring to Figures 1-3, this embodiment provides a printing device, including a frame 110, an XY motion mechanism, a tool head 700, and a controller. The frame 110 includes a rear portion 111 and side portions 113 connected to both ends of the rear portion 111. The side portions 113 have a Y-axis mounting structure. The XY motion mechanism, as described above, includes a Y-axis slide rail 125 and a Y-axis slider 126. The Y-axis slide rail 125 is mounted on the Y-axis mounting structure, and the Y-axis slider 126 is slidably mounted on the Y-axis slide rail 125. The tool head 700 is mounted on the XY motion mechanism.

[0307] The side portion 113 has a Y-axis zero-position surface 1131 in the region near the rear portion 111;

[0308] The 3D printing equipment further includes a cutter triggering device 600, which includes a base 610, a triggering component 620, and a driving component 630. The base 610 is installed on the side portion 113 near the rear portion 111. The triggering component 620 includes a trigger member 621, which is rotatably connected to the base 610 about a rotation axis 623 perpendicular to the XY plane of the XY motion mechanism. The driving component 630 includes a trigger driving member and a first transmission mechanism. The trigger driving member is slidably disposed on the base 610 along a direction parallel to the Y-axis slide rail 125, and drives the trigger member 621 to rotate through the first transmission mechanism.

[0309] The Y-axis zero-position surface 1131 and the trigger drive are both located within the sliding stroke of the Y-axis slider 126, and the Y-axis zero-position surface 1131 is closer to the rear part 111 than the trigger drive, so that the trigger drive is triggered first to drive the trigger 621 to rotate during the sliding of the Y-axis slider 126 toward the rear part 111, and then touches the Y-axis zero-position surface 1131;

[0310] When the tool head 700 is performing zero-position verification, the Y-axis slider 126 is controlled to slide towards the rear side 111. When a second collision is detected, it is determined that the Y-axis slider 126 has touched the Y-axis zero-position surface 1131. The position of the tool head 700 at this time is taken as its zero position in the Y-axis direction.

[0311] The cutting trigger device 600, which is the first of its kind in this application, introduced above, has the technical effect of significantly saving the internal space of the 3D printing equipment and significantly increasing the working space of the tool head 700. The 3D printing equipment provided in this embodiment adopts the cutting trigger device 600 and provides a method for positioning the zero position in the Y-axis direction when using the cutting trigger device 600. Thus, the cutting trigger device 600 introduced above can be applied to the 3D printing equipment without technical obstacles. Moreover, the positioning method is simple and the positioning result is accurate, which greatly improves the working efficiency of the 3D printing equipment.

[0312] Preferably, a reset torsion spring 650 is provided between the trigger 621 and the base 610 so that the trigger 621 can rotate in the opposite direction under the action of the reset torsion spring 650 when the external force disappears.

[0313] Preferably, when performing zero-position verification at the tool head 700,

[0314] If the trigger 621 is in the initial position

[0315] Control the Y-axis slider 126 to slide to the rear side 111 until it passes the trigger 621 and pushes the trigger drive to slide until the Y-axis slider 126 collides with the Y-axis zero surface 1131, which is the first collision of the Y-axis slider 126.

[0316] Then, the Y-axis slider 126 is controlled to slide a first preset distance away from the rear side 111 until it is separated from the trigger drive. At the same time, the trigger 621 rotates in the opposite direction to the over-rotation position under the action of the reset torsion spring 650.

[0317] Then, control the Y-axis slider 126 to slide to the rear side 111 until the Y-axis slider 126 slides to the Y-axis zero surface 1131 and touches it again, which is the second collision of the Y-axis slider 126.

[0318] The over-rotation position is located where the trigger 621 exceeds the working position in the first rotation direction, and after exceeding the over-rotation position, the trigger 621 abuts against the reset torsion spring 650; the first direction is the direction in which the trigger 621 rotates from the initial position to the working position.

[0319] Preferably, the trigger member 621 has a second trigger protrusion 6215 protruding radially. In the initial position, the second trigger protrusion 6215 is located on the side of the trigger member 621 near the same side edge 113. When the tool head 700 performs zero-position verification, if the trigger member 621 is in a position other than the initial position,

[0320] Control the Y-axis slider 126 to slide to the rear side 111 until it pushes against the second trigger protrusion 6215, causing the trigger 621 to rotate until the Y-axis slider 126 passes the second trigger protrusion 6215 and separates from the second trigger protrusion 6215;

[0321] The Y-axis slider 126 is controlled to continue sliding to the rear side 111 until it collides with the Y-axis zero surface 1131, which is the first collision. After that, the Y-axis slider 126 is controlled to move in the opposite direction for a second preset distance. At the same time, the trigger drive is rotated in the opposite direction to the over-rotation position under the action of the reset torsion spring 650 (at this time, the Y-axis slider 126 is located between the trigger drive and the trigger 621).

[0322] Then control the Y-axis slider 126 to slide to the rear side 111 until it collides with the Y-axis zero surface 1131, which is the second collision;

[0323] The over-rotation position is located where the trigger 621 exceeds the working position in the first rotation direction, and after exceeding the over-rotation position, the trigger 621 abuts against the reset torsion spring 650; the first direction is the direction in which the trigger 621 rotates from the initial position to the working position.

[0324] The above settings can improve the positioning accuracy of the Y-axis zero position. This is because when the Y-axis slider 126 experiences its first collision, it may not necessarily be that the Y-axis slider 126 collided with the Y-axis zero position surface 1131; it could also be that the Y-axis slider 126 accidentally touched another component. However, as long as the Y-axis slider 126 experiences a second collision, it will definitely collide with the Y-axis zero position surface 1131. Therefore, the position of the tool head 700 at the time of the second collision is taken as its zero position in the Y-axis direction.

[0325] Preferably, the base 610 is provided with a limiting groove 614, and a limiting ball 640 is installed in the limiting groove 614; the trigger member 621 is provided with a standby groove 6218a, a working groove 6218b, and a rotation groove 6218c; the initial position, working position, and rotation position are sequentially arranged in the first rotation direction of the trigger member 621. In the initial position, the limiting ball 640 is limited and engaged with the standby groove 6218a; in the working position, the limiting ball 640 is limited and engaged with the working groove 6218b; in the rotation position, the limiting ball 640 is limited and engaged with the rotation groove 6218c.

[0326] Therefore, no matter what position the trigger 621 is in, it can be reliably positioned by the limiting ball 640 and the corresponding groove. Without the application of obvious external force, the position of the trigger 621 will not change, thus improving the reliability and stability of the cutter triggering device 600.

[0327] Preferably, it also includes a drive motor, which is mounted on the rear side 111 and is used to drive the Y-axis slider 126 to slide.

[0328] The collision of the Y-axis slider 126 is determined by detecting the change in the current of the drive motor. The second collision of the Y-axis slider 126 occurs when the drive motor experiences the second change in current.

[0329] By detecting whether the current of the drive motor changes abruptly, it can be confirmed whether the Y-axis slider 126 has collided. The second collision occurs when the drive motor experiences a second sudden current change.

[0330] Preferably, it also includes an encoder connected to the drive motor, which records the current angle of the encoder as zero when a second change in the drive motor is detected.

[0331] At this point, the adjustment of the tool head 700's movement displacement can be based on the zero position obtained from the encoder.

[0332] Preferably, it also includes a nozzle assembly 400 and a printing panel, with the nozzle assembly 400 disposed on the inner side of the rear portion 111;

[0333] Projected along the X-axis, the cutter trigger device 600 is located between the printing panel and the drive motor, and has an overlapping area with the nozzle assembly 400.

[0334] The wiping nozzle assembly 400 is used to wipe away any remaining printing material at the outlet after cutting. The overlapping area between the cutter trigger device 600 and the wiping nozzle assembly 400 when projected along the X-axis saves space along the Y-axis.

[0335] This embodiment also provides a zero-position calibration method for a 3D printing device, including a frame 110, an XY motion mechanism, a tool head 700, and a controller. The frame 110 includes a rear portion 111 and side portions 113 connected to both ends of the rear portion 111. The side portions 113 have a Y-axis mounting structure. The XY motion mechanism includes a Y-axis slide rail 125 and a Y-axis slider 126. The Y-axis slide rail 125 is mounted on the Y-axis mounting structure, and the Y-axis slider 126 is slidably mounted on the Y-axis slide rail 125. The tool head 700 is mounted on the XY motion mechanism.

[0336] The side portion 113 has a Y-axis zero position in the region near the rear portion 111;

[0337] The 3D printing equipment further includes a cutter triggering device 600, which includes a base 610, a triggering component 620, and a driving component 630. The base 610 is installed on the side portion 113 near the rear portion 111. The triggering component 620 includes a trigger member 621, which is rotatably connected to the base 610 about a rotation axis 623 perpendicular to the XY plane of the XY motion mechanism. The driving component 630 includes a trigger driving member and a first transmission mechanism. The trigger driving member is slidably disposed on the base 610 along a direction parallel to the Y-axis slide rail 125, and drives the trigger member 621 to rotate through the first transmission mechanism.

[0338] The Y-axis zero-position surface 1131 and the trigger drive are both located within the sliding stroke of the Y-axis slider 126, and the Y-axis zero-position surface 1131 is closer to the rear side 111 than the trigger drive, so that the trigger drive is triggered first to drive the trigger 621 to rotate during the sliding of the Y-axis slider 126 toward the rear side 111, and then touches the Y-axis zero position.

[0339] The zero-position verification method includes:

[0340] When the tool head 700 receives a command to perform zero-position verification, the Y-axis slider 126 is controlled to slide towards the rear part 111;

[0341] When a second collision is detected with the Y-axis slider 126, it is determined that the Y-axis slider 126 has touched the Y-axis zero-position surface 1131, and the position of the tool head 700 at this time is taken as its zero position in the Y-axis direction.

[0342] The zero-position verification method for 3D printing equipment provided in this embodiment enables the cutting trigger device 600 described above to be applied to 3D printing equipment without technical obstacles. Moreover, the positioning method is simple and the positioning result is accurate, which greatly improves the working efficiency of 3D printing equipment.

[0343] Preferably, a reset torsion spring 650 is provided between the trigger 621 and the base 610, so that the trigger 621 can rotate in the opposite direction under the action of the reset torsion spring 650 when the external force disappears; the zero-position verification method includes:

[0344] When the tool head 700 receives an instruction to perform a zero-position check, if the trigger 621 is in the initial position, then

[0345] Control the Y-axis slider 126 to slide towards the rear part 111 until it passes the trigger 621 and pushes against the trigger drive until the Y-axis slider 126 collides with the Y-axis zero surface 1131, which is the first collision of the Y-axis slider 126.

[0346] Then, the Y-axis slider 126 is controlled to slide a first preset distance away from the rear part 111 until it is separated from the trigger drive member. At the same time, the trigger member 621 rotates in the opposite direction to the over-rotation position under the action of the reset torsion spring 650.

[0347] Then, control the Y-axis slider 126 to slide towards the rear part 111 until the Y-axis slider 126 slides to touch the Y-axis zero position again, which is the second collision of the Y-axis slider 126.

[0348] The over-rotation position is located where the trigger 621 exceeds the working position in the first rotation direction, and after exceeding the over-rotation position, the trigger 621 abuts against the reset torsion spring 650; the first direction is the direction in which the trigger 621 rotates from the initial position to the working position.

[0349] Preferably, the trigger member 621 has a second trigger protrusion 6215 protruding radially, and in the initial position, the second trigger protrusion 6215 is located on the side of the trigger member 621 near the side portion 113 on the same side; the zero-position verification method includes:

[0350] When the tool head 700 receives a command to perform a zero-position check, if the trigger 621 is in a position other than its initial position, then

[0351] Control the Y-axis slider 126 to slide towards the rear part 111 until it pushes against the second trigger protrusion 6215, causing the trigger 621 to rotate until the Y-axis slider 126 passes the second trigger protrusion 6215 and separates from the second trigger protrusion 6215;

[0352] The Y-axis slider 126 is controlled to continue sliding towards the rear portion 111 until it collides with the Y-axis zero surface 1131, which is the first collision. After that, the Y-axis slider 126 is controlled to move in the opposite direction a second preset distance; at the same time, the trigger drive member rotates in the opposite direction to the over-rotation position under the action of the reset torsion spring 650; (in the specification, at this time the Y-axis slider 126 is located between the trigger drive member and the trigger member 621)

[0353] Then, control the Y-axis slider 126 to slide towards the rear part 111 until it collides with the Y-axis zero surface 1131, which is the second collision.

[0354] The over-rotation position is located where the trigger 621 exceeds the working position in the first rotation direction, and after exceeding the over-rotation position, the trigger 621 abuts against the reset torsion spring 650; the first direction is the direction in which the trigger 621 rotates from the initial position to the working position.

[0355] The above method can improve the positioning accuracy of the Y-axis zero position. When the Y-axis slider 126 experiences its first collision, it may not necessarily be that the Y-axis slider 126 collided with the Y-axis zero position surface 1131; it could also be that the Y-axis slider 126 accidentally touched another component. However, as long as the Y-axis slider 126 experiences a second collision, it will definitely collide with the Y-axis zero position surface 1131. Therefore, the position of the tool head 700 at the time of the second collision is taken as its zero position in the Y-axis direction.

[0356] Preferably, the 3D printing equipment further includes a drive motor, which is mounted on the rear part 111 and is used to drive the Y-axis slider 126 to slide.

[0357] The collision of the Y-axis slider 126 is determined by detecting the change in the current of the drive motor. The second collision of the Y-axis slider 126 occurs when the drive motor experiences a second change in current.

[0358] By detecting whether the current of the drive motor changes abruptly, it can be confirmed whether the Y-axis slider 126 has collided. The second collision occurs when the drive motor experiences a second sudden current change.

[0359] Preferably, the 3D printing equipment further includes an encoder connected to the drive motor; the zero-position verification method further includes:

[0360] When a second change in the drive motor is detected, the current angle of the encoder is recorded as zero.

[0361] At this point, the adjustment of the tool head 700's movement displacement can be based on the zero position obtained from the encoder.

[0362] It should be noted that in this application, the frame and the base can be separate structures, that is, they are manufactured and processed separately, and then the base is installed on the frame by screws, snap-fit ​​or other means; or the frame and the base can be integrated into one structure, such as an integral molding structure, an integral injection molding structure or welded molding, that is, the frame and the base form a single part, such as by casting in one piece, and then only a few high-precision mounting surfaces need to be precision machined.

[0363] The following describes the working process of the cutter triggering device 600, taking as an example that the cutter triggering device 600 is installed on the side 113 on the left side of Figure 3 and close to the rear side 111, that is, the triggering end of the trigger is located on the side away from the rear side 111. The rotation direction of the trigger 621 from the initial position to the working position is called the first rotation direction, and the opposite direction is called the second rotation direction; the direction in which the Y-axis slider slides towards the rear side 111 is called the first sliding direction, and the opposite direction is called the second sliding direction. Referring to Figure 4, which is a structural schematic diagram of the trigger 621 in its initial state, the standby groove 6218a is engaged with the limiting ball 640 in this position. When cutting is required, the Y-axis slider slides along the first sliding direction, passing through the position corresponding to the trigger 621 (including the working position) until the Y-axis slider collides with the trigger block, pushing the trigger rack 631 to slide along the first sliding direction. Through the sequential transmission of the drive gear 632, drive rack 633, and rotating part 6213c, the trigger 621 is driven to rotate along the first rotation direction until the rotating rod rotates to the working position. The working groove 6218b on the trigger 621 engages with the limiting ball 640 to limit the trigger 621 to the working position, as shown in Figure 5. At this time, the tool head slides along the X-axis, causing the cutting assembly to push against the trigger 621, thereby cutting the wire. Of course, in the embodiment where the rod 6212 slides relative to the rotating part 6213a, when the tool head slides to the point where the cutting assembly contacts the trigger 621, the rod 6212 will first slide to abut against the base 610 or the frame 110 as the cutting assembly continues to slide, before it can cut the wire. Afterward, the Y-axis slider slides along the second sliding direction, thereby pushing the trigger 621 to rotate along the second rotation direction. Specifically, it may push against the first trigger protrusion 6214 on the trigger 621 and return to the initial position.

[0364] As mentioned earlier, sometimes the trigger 621 may be accidentally triggered or an unexpected operation may occur, causing it to rotate under the action of external force. With the setting of the reset torsion spring 650, when it rotates beyond the over-rotation position, it can also return to the over-rotation position under the action of the reset torsion spring 650 after the external force disappears. The trigger 621 is then restricted to the over-rotation position by the cooperation of the over-rotation groove 6218c and the limiting ball 640, as shown in Figure 6. In this scenario, when the wire needs to be cut, the Y-axis slider slides along the first sliding direction. It first slides past the working position and then continues to slide, thereby pushing the trigger 621 to rotate. Specifically, the Y-axis slider can push against the second trigger protrusion 6215 to make the trigger 621 rotate along the first rotation direction. During the continued rotation of the trigger 621, the reset torsion spring 650 abuts against the trigger 621. When the trigger 621 rotates to a certain position, as shown in Figure 7, the trigger 621 separates from the Y-axis slider, meaning the Y-axis slider has passed the second trigger protrusion 6215. Under the reset force of the reset torsion spring 650, the trigger 621 rotates in the opposite direction. That is, it rotates along the second rotation direction. When it rotates to the over-rotation position, it stops rotating under the action of the limiting ball 640. By the reverse movement of the Y-axis slider, that is, moving along the second sliding direction, it can push the trigger 621 to continue rotating in the second rotation direction until it rotates to the working position and stops pushing. Specifically, the Y-axis slider can push the first trigger protrusion 6214. In the working position, under the limiting cooperation of the working groove and the limiting ball 640, the trigger 621 can be reliably and stably restricted in the working position. Then, as described above, the tool head moves in the normal state to cut the material. After cutting the material, the trigger 621 is reset to the initial position in the aforementioned manner.

[0365] Those skilled in the art will understand that, without conflict, the above-mentioned preferred solutions can be freely combined and superimposed.

[0366] It should be understood that the above-described embodiments are merely exemplary and not restrictive. Any obvious or equivalent modifications or substitutions made by those skilled in the art regarding the above details without departing from the basic principles of this application shall be included within the scope of the claims of this application.

Claims

1. A 3D printing device, comprising a frame, an XY motion mechanism, a drive motor, a nozzle assembly, a tool head, a cutting assembly, and a printing panel, wherein the XY motion mechanism is mounted on the frame, the tool head is mounted on the XY motion mechanism and is movable in the X-axis and Y-axis directions via the XY motion mechanism to perform printing on the printing panel; the cutting assembly is disposed on the tool head, characterized in that, The frame includes a rear part and side parts connected to both ends of the rear part. The drive motor is mounted on the rear part, and the wiping nozzle assembly is provided on the inner side of the rear part. The 3D printing equipment also includes a cutter triggering device, which is at least disposed on one of the side portions and projected in the X-axis direction. The cutter triggering device is at least partially located between the printing panel and the drive motor, and / or the cutter triggering device has an overlapping area with the nozzle assembly. The cutting triggering device includes a base, a triggering assembly, and a driving assembly. The triggering assembly includes a trigger element rotatably connected to the base. The trigger element has an initial position and a working position. In the initial position, the trigger element is located outside the movement space of the tool head. In the working position, the trigger element is at least partially located in the movement space, for triggering the cutting assembly to cut the material. The driving assembly is mounted on the base and is used to drive the trigger element to rotate.

2. The 3D printing equipment according to claim 1, characterized in that, At least a portion of the inner side of the rear portion is recessed outward to form a recessed space, the recessed space penetrates the bottom surface of the rear portion, the recessed space is located on the side of the printing panel near the nozzle assembly, and the nozzle assembly is at least partially accommodated in the recessed space.

3. The cutter triggering device according to claim 1, characterized in that, The rotation axis of the trigger is parallel to the XY plane of the 3D printing equipment.

4. The cutter triggering device according to claim 3, characterized in that, Projecting along a direction perpendicular to the XY plane, the line connecting the trigger point of the trigger element and the center point of its rotating support section is taken as the center line, and the center line forms an angle with the rotation axis. Alternatively, the normal direction of the trigger point of the trigger element at the time of triggering forms an angle with the rotation axis of the trigger element.

5. The cutter triggering device according to claim 3, characterized in that, Projecting along the rotation axis of the trigger, the line connecting the trigger point of the trigger and the center point of its rotation support section is taken as the center line, which is perpendicular to the rotation axis. Alternatively, the normal direction of the trigger point of the trigger element is parallel to the rotation axis of the trigger element when it is triggered.

6. The cutter triggering device according to claim 1, characterized in that, The rotation axis of the trigger is perpendicular to the XY plane of the 3D printing equipment.

7. The cutter triggering device according to claim 6, characterized in that, Projecting along the rotation axis of the trigger, the line connecting the trigger point of the trigger and the center point of its rotation support section is taken as the center line, which is perpendicular to the rotation axis. Alternatively, the normal direction of the trigger point of the trigger element is perpendicular to the rotation axis of the trigger element when it is triggered.

8. The 3D printing equipment according to claim 7, characterized in that, The 3D printing equipment also includes an XY motion mechanism, which includes an X-axis slide rail and a Y-axis slide rail; each of the side portions is equipped with the Y-axis slide rail, and the two ends of the X-axis slide rail are slidably mounted on the two Y-axis slide rails respectively; the tool head is slidably mounted on the X-axis slide rail; The rotation axis of the trigger is perpendicular to the X-axis slide rail and the Y-axis slide rail. The trigger is parallel to the Y-axis slide rail in the initial position and parallel to the X-axis slide rail in the working position.

9. The 3D printing equipment according to claim 8, characterized in that, The XY motion mechanism further includes a Y-axis slider, and each Y-axis slide rail is slidably mounted with the Y-axis slider; the X-axis slide rail is slidably mounted on the Y-axis slide rail via the Y-axis slider; the Y-axis slider is used to drive the drive assembly to trigger the trigger element to rotate. The movement space of the tool head covers the printing panel; When the Y-axis slider slides to rotate the trigger to the working position, the minimum distance between the nozzle of the tool head and the rear side of the printing panel along the Y-axis direction where the Y-axis slide rail is located is less than or equal to 15mm.

10. The 3D printing equipment according to claim 8, characterized in that, The base is positioned above the Y-axis slide rail; the drive assembly includes a trigger rack, a drive gear, and a first transmission mechanism. The trigger rack is slidably mounted on the base, and a trigger block is protruding from the side facing the Y-axis slide rail. The trigger block is located within the sliding stroke of the Y-axis slider. The drive gear is rotatably mounted on the base and meshes with the trigger rack; The trigger is provided with meshing teeth in at least a portion of the area along the rotation axis, and the meshing teeth are driven to engage with the drive gear through the first transmission mechanism.

11. The cutter triggering device according to claim 10, characterized in that, The first transmission mechanism includes an odd number of sequentially meshing first transmission gears. Of these odd number of meshing first transmission gears, the two most distant first transmission gears mesh with the driving gear and the meshing teeth on the trigger element, respectively; or, The first transmission mechanism includes a drive rack, which is slidably mounted on the base along a direction parallel to the trigger rack, and is connected to the trigger rack via the drive gear; The meshing teeth on the trigger engage with the drive rack.

12. The 3D printing equipment according to claim 11, characterized in that, Both the trigger rack and the trigger assembly are located on the same side of the drive rack away from the side portion. In the direction of the Y-axis slide rail, the trigger element in its initial position is driven by the drive gear and is located on the side of the drive gear away from the rear portion.

13. The 3D printing equipment according to claim 7, characterized in that, When the trigger is in the working position, the distance between the wiping nozzle assembly and the trigger is between 5 and 25 mm.

14. The 3D printing equipment according to claim 7, characterized in that, The rotation radius of the trigger end of the trigger element is 25-55 mm.

15. The 3D printing equipment according to claim 7, characterized in that, The two ends of the rear portion are respectively connected to the side portion through corner portions, and the top surface of the side portion is recessed from the corner portion to which it is connected, forming an accommodating space; The base includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to the same side of the base plate and are spaced apart. The side of the first side plate facing away from the base plate forms a base overlapping surface. A first connecting lug is provided on the base overlapping surface near the second side plate. The first side plate overlaps the top surface of the side portion through the base overlapping surface and is locked to the side portion through the first connecting lug. The rotation axis of the trigger is set on the base plate and located between the first side plate and the second side plate.

16. The 3D printing equipment according to claim 7, characterized in that, The triggering element includes a rod body and a transmission element. The transmission element includes a rotating part, which is rotatably mounted on the base. The rod body is slidably mounted on the rotating part along its center line. The trigger is rotatably connected to the base via the rotating part. In the working position, a buffer gap is left between the rod body and the side part along its center line direction, and under the action of the cutting assembly, it can cross the buffer gap and abut against the frame or the base.

17. The 3D printing equipment according to claim 16, characterized in that, Projected along directions perpendicular to the X and Y axes, the rod is located below the rotating part.

18. The 3D printing equipment according to claim 16, characterized in that, The transmission component further includes a sleeve portion, the rotating portion being connected to one end of the sleeve portion and located radially outward of the sleeve portion; the rod body is slidably inserted into the sleeve portion; or, The cutter triggering device further includes a slider shaft, and the rotating part is rotatably mounted on the base via the slider shaft; The rod body is provided with a strip-shaped hole, the extension direction of the strip-shaped hole is consistent with the center line of the rod body, and the slider shaft is slidably engaged with the strip-shaped hole so that the rod body can slide along the extension direction of the strip-shaped hole.

19. The 3D printing equipment according to claim 18, characterized in that, Limiting surfaces are respectively provided on the rod body and the sleeve portion, and the two limiting surfaces are arranged facing each other along the center line of the rod body. The reset member is disposed between the two limiting surfaces.

20. The 3D printing equipment according to claim 16, characterized in that, A reset element is provided between the rod and the rotating part so that the rod can return to its original position after the cutting assembly is separated from the rod.

21. The 3D printing equipment according to claim 1, characterized in that, The tool head has two nozzles; each of the side portions is respectively equipped with a cutting trigger device, which is used to cut the wire in the nozzle on the corresponding side.

22. The 3D printing equipment according to claim 1, characterized in that, The trigger is rotatably connected to the base. The trigger has an initial position and a working position. In the initial position, the trigger is located outside the movement space of the tool head. In the working position, the trigger is at least partially located in the movement space and on a plane parallel to the XY plane of the 3D printing device, for triggering the cutting assembly to cut the material. The drive assembly includes a drive motor, the trigger motor is mounted on the base or frame, one end of the trigger is connected to the drive shaft of the drive motor and is rotatably mounted on the base so as to drive the trigger to rotate by the drive motor.

23. The 3D printing equipment according to claim 22, characterized in that, The triggering element includes a rod and a transmission element connected to each other. The transmission element includes a rotating part, which is rotatably mounted on the base. The drive shaft of the drive motor is connected to the rotating part in a transmission connection.

24. The 3D printing equipment according to claim 23, characterized in that, The transmission component also includes a sleeve portion, and the rotating portion is connected to one end of the sleeve portion; the rod body is slidably inserted into the sleeve portion, and in the working position, the rod body can move relative to the sleeve to abut against the frame of the 3D printing equipment or the base.

25. The 3D printing equipment according to claim 23, characterized in that, The sleeve portion is provided with a limiting hole that penetrates its cylinder wall; the rod body is provided with a limiting groove; The trigger also includes a limiting member, which is inserted into the limiting hole and has one end extending into the limiting groove.

26. The 3D printing equipment according to claim 23, characterized in that, The rod body is provided with a stop step surface, which faces the rotating part and can be arranged opposite to the end of the sleeve part away from the rotating part.

27. The 3D printing equipment according to claim 1, characterized in that, The base is mounted on the frame; The triggering element includes a rod and a transmission element. The transmission element includes a rotating part, which is rotatably connected to the base. The rod is slidably connected to the rotating part along its centerline, and a reset element is provided between them. The triggering element has an initial position and a working position. In the initial position, the rod is located outside the movement space of the tool head. In the working position, the rod is at least partially located in the movement space, used to trigger the cutting assembly to cut material. The rod can slide against the base or the frame through the pushing of the cutting assembly, and the reset element is in a deformed state. The drive assembly is mounted on the base and is used to drive the trigger to rotate.

28. The 3D printing equipment according to claim 27, characterized in that, The drive assembly includes a drive rack, a trigger rack, and a drive gear. The drive rack and the trigger rack are arranged in parallel, and each of them has a drive tooth on its opposite side. The drive rack and the trigger rack are slidably mounted on the base. The drive gear is meshed with the drive teeth on the drive rack and the trigger rack. The rotating part has a ring-shaped structure, and at least a portion of its outer peripheral surface is provided with meshing teeth that mesh with the driving teeth.

29. The 3D printing equipment according to claim 28, characterized in that, The drive rack is closer to the frame than the trigger rack. The trigger and the trigger rack are located on the same side of the drive rack. In the direction of the rotation axis of the rotating part, the rod extends beyond the drive rack. In the working position, the trigger end of the rod is located on the side of the trigger rack.

30. The 3D printing equipment according to claim 28, characterized in that, The base includes a base plate, a first side plate and a second side plate disposed opposite to each other, and a drive rack disposed against the inner side surface of the first side plate; a trigger rack disposed near the second side plate; and a rotating part rotatably connected to the base plate; wherein the second side plate has a notched corner at one end near the rotating part, so that a rotation space for the trigger is formed in the area corresponding to the notched corner on the base plate.

31. The 3D printing equipment according to claim 30, characterized in that, The base plate, the first side plate, and the second side plate are in a U-shaped structure.

32. The 3D printing equipment according to claim 31, characterized in that, A surrounding panel is also connected to the edge of the base plate. The surrounding panel is located between the first side panel and the second side panel, and is located on the same side of the base plate as the first side panel.

33. The 3D printing equipment according to claim 31, characterized in that, In the direction of the rotation axis of the rotating part, the rod extends beyond the first side plate and is opposite to the bottom plate; the side of the first side plate opposite to the bottom plate overlaps the frame, and the opening of the U-shaped structure faces downward.

34. The 3D printing equipment according to claim 1, characterized in that, The frame and the base are an integral structure.

35. A cutting triggering device for use in the 3D printing equipment according to any one of claims 1-34, the 3D printing equipment comprising a frame, a tool head, and a cutting assembly, the cutting assembly being disposed on the tool head, and the tool head being movably mounted on the frame; characterized in that, The cutter triggering device includes a base, a triggering component, and a driving component; The triggering component includes a trigger member, which is rotatably connected to the base about a rotation axis that forms an angle with its center line. The trigger member has an initial position and a working position. In the initial position, the trigger member is located outside the movement space of the tool head. In the working position, the trigger member is at least partially located in the movement space, perpendicular to the Y-axis direction, and located on a plane parallel to the XY plane of the 3D printing device, for triggering the cutting component to cut the material. The drive assembly includes a drive motor, the trigger motor is mounted on the base or frame, one end of the trigger is connected to the drive shaft of the drive motor and is rotatably mounted on the base so as to drive the trigger to rotate by the drive motor.

36. The cutter triggering device according to claim 35, characterized in that, The triggering element includes a rod and a transmission element connected to each other. The transmission element includes a rotating part, which is rotatably mounted on the base. The drive shaft of the drive motor is connected to the rotating part in a transmission connection.

37. The cutter triggering device according to claim 36, characterized in that, The transmission component also includes a sleeve portion, and the rotating portion is connected to one end of the sleeve portion; the rod body is slidably inserted into the sleeve portion, and in the working position, the rod body can move relative to the sleeve portion to abut against the frame or base of the 3D printing equipment.

38. The cutter triggering device according to claim 37, characterized in that, The sleeve portion is provided with a limiting hole that penetrates its cylinder wall; the rod body is provided with a limiting groove; The trigger also includes a limiting member, which is inserted into the limiting hole and has one end extending into the limiting groove.

39. The cutter triggering device according to claim 37, characterized in that, The rod body is provided with a stop step surface, which faces the rotating part and can be disposed opposite to the end of the sleeve part away from the rotating part. A return spring is provided between the rod body and the sleeve part.

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