Hidden cutting device and 3D printer and operation method applying the same

Abstract

The application relates to the field of 3D printing technology, in particular to a hidden cutting device, a 3D printer applying the same and an operation method. The hidden cutting device comprises a mounting main body fixedly installed in a frame structure at the periphery of a printing platform of a 3D printer, a cutter top rod rotationally connected to the mounting main body, the cutter top rod having a first state of being located in the periphery of the printing platform and extending along a first direction and a second state of being located in a printing area of the printing platform and extending along a second direction, when the cutter top rod is switched to the second state, a cutting part of a nozzle assembly of the 3D printer faces the cutter top rod, and a driving piece is connected to the cutter top rod in linkage and controls the cutter top rod to rotationally switch between the first state and the second state. The technical problem that the printing space of the 3D printer is occupied, the printing space is wasted and the printing efficiency is affected is solved.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and more particularly to a hidden cutting device, a 3D printer using the same, and a method of operation. Background Technology

[0002] A 3D printer works by heating the nozzle assembly at high temperatures to melt the printing filament and deposit it onto the printing platform. When the molten printing filament comes into contact with the printing platform, it cools and solidifies rapidly. The nozzle assembly then deposits the printing material layer by layer onto the printing platform along a pre-set printing path, thereby constructing a model with a three-dimensional structure.

[0003] Currently, the cutter push rods used in 3D printers to assist in cutting the filament on the printhead assembly are generally fixed in the corner of the printing platform to minimize the impact on the printing space. However, even so, the cutter push rods must extend at least, and their extended parts must fall within the printing area of ​​the printing platform. They always need to occupy a certain printing area so that the printhead assembly can move to that position within its printing stroke trajectory and collide with the extended cutter push rod. This causes the cutter push rod to insert and push the cutter handle on the printhead assembly, which in turn moves the cutter to cut the filament.

[0004] Even if the cutter push rod is placed in a corner of the printing platform to minimize its space occupation, the existing technology will still occupy at least a portion of the printing area, resulting in wasted printing space and affecting printing efficiency. Summary of the Invention

[0005] The purpose of this application is to provide a concealed cutting device, a 3D printer using the same, and an operating method thereon, in order to solve the technical problems of occupying printing space in the 3D printer, causing waste of printing space, and affecting printing efficiency.

[0006] In a first aspect, this application provides a concealed cutting device for use in a 3D printer, comprising:

[0007] The main body is fixedly installed within the frame structure surrounding the printing platform of the 3D printer;

[0008] A cutting rod connected to the mounting body is rotatably rotated. The cutting rod has a first state located within the periphery of the printing platform and extending along a first direction, and a second state located within the printing area of ​​the printing platform and extending along a second direction. When the cutting rod is switched to the second state, the cutting component of the nozzle assembly of the 3D printer faces the cutting rod.

[0009] A drive component that is linked to the cutter push rod controls the cutter push rod to rotate between its first state and its second state.

[0010] Furthermore, a buffer gear is rotatably connected to the mounting body, and the cutter push rod contacts and is positioned opposite to the buffer gear;

[0011] The driving component extends or retracts along the first direction, and a rack is provided on the side wall of the driving component, which meshes with the buffer gear.

[0012] The buffer gear is provided with a first buffer part, and the cutter push rod is provided with a second buffer part that corresponds to and cooperates with the first buffer part. When the cutter push rod rotates to its second state position, the driving member continues to move along the first direction, and the first buffer part of the buffer gear disengages from the second buffer part of the cutter push rod to provide buffering.

[0013] Furthermore, the mounting body is provided with a vertically arranged rotating shaft, on which the buffer gear is sleeved; the cutter push rod is rotatably connected to the rotating shaft and contacts and is positioned opposite to the buffer gear; and / or

[0014] The first buffer section is configured as a first buffer bevel structure, and the second buffer section is configured as a second buffer bevel structure.

[0015] Furthermore, the top of the buffer gear is provided with at least one first protrusion and at least one first recess spaced apart, as well as at least one first buffer portion, with adjacent first protrusions and first recesses being transitionally connected by the first buffer portion.

[0016] Conversely, the bottom of the cutter top rod is provided with at least one second protrusion and at least one second recess, and at least one second buffer portion, with adjacent second protrusions and second recesses being transitionally connected by the second buffer portion.

[0017] Furthermore, a spring is also fitted onto the rotating shaft, the spring being located below the buffer gear, and a slot is provided at the bottom of the buffer gear;

[0018] The top end of the spring is inserted into and fixed in the slot, and the bottom end of the spring is fixedly connected to the mounting body.

[0019] Furthermore, a reset torsion spring is sleeved and connected at the connection between the rotating shaft and the cutter push rod. One end of the reset torsion spring is fixedly connected to the cutter push rod, and the other end is fixedly connected to the mounting body. The first state of the cutter push rod is its initial reset state.

[0020] Furthermore, the driving member is configured as a striking block extending along a first direction, the striking block being mounted on the mounting body and moving outward or retracting along the first direction, with a first end of the striking block extending beyond the mounting body; and / or

[0021] Both the first direction and the second direction are horizontal and are set at an angle greater than 20°.

[0022] Furthermore, the concealed cutting device also includes a mounting connecting block, on which the cutting top rod and the driving component are mounted, and the mounting body has a recessed mounting notch, into which the mounting connecting block can be detachably mounted.

[0023] Secondly, this application provides a 3D printer that uses the hidden cutting device described in any of the preceding descriptions. The driving end of the driving member of the hidden cutting device extends toward a first direction, and the driving end moves and changes along the first direction by extending or retracting.

[0024] The 3D printer includes a printing platform, a frame structure that is supported and fixed outside the printing area of ​​the printing platform, a nozzle assembly with a cutting component that is slidably connected to a third sliding axis, and an impact assembly that is slidably connected to a first sliding axis. The cutting component is configured to face the cutting top rod of the concealed cutting device.

[0025] The frame structure has a first sliding shaft and a second sliding shaft that are fixedly arranged on opposite sides, extending along a first direction. The third sliding shaft extends along a direction perpendicular to the same horizontal plane as the first direction. The mounting body of the concealed cutting device is embedded and fixedly connected to the corner of the frame structure that is connected to the first sliding shaft. One end of the third sliding shaft is fixedly connected to the impact component, and the other end is slidably connected to the second sliding shaft through an adapter.

[0026] Thirdly, this application provides an operating method, including the aforementioned 3D printer, the operating method comprising:

[0027] Step 100: Control the impact component to move along the first sliding axis toward the mounting body of the concealed cutting device and impact the drive end of the drive component of the concealed cutting device, and cause the drive end to retract and move. At the same time, the cutter push rod changes from a first state located in the periphery of the printing platform and extending in the first direction to a second state located in the printing area of ​​the printing platform and extending in the second direction.

[0028] Step 200: The side of the nozzle assembly with the cutting component moves along the third sliding axis toward the cutter push rod, so that the cutter push rod abuts against the drive side of the cutter handle of the cutting component, driving the cutter to cut the filament.

[0029] Step 300: Control the nozzle assembly to move away from the cutter push rod along the third sliding axis, control the impact assembly to move away from the mounting body along the first sliding axis to disengage from the drive end, the drive end resets and extends, and at the same time the cutter push rod changes from the second state back to the first state.

[0030] Compared with the prior art, the concealed cutting device provided in this application is applied to a 3D printer. The mounting body of the concealed cutting device is fixedly installed within the frame structure surrounding the printing platform of the 3D printer, located outside the printing area, and does not occupy printing space. The cutting rod, which is rotatably connected to the mounting body, has a first state located within the periphery of the printing platform and extending along a first direction (such as the Y-axis) and a second state located within the printing area of ​​the printing platform and extending along a second direction (such as the X-axis). When cutting is not required, the cutting rod is in the initial state of the first state, hidden within the frame structure outside the printing area, without affecting the printing operation or occupying space. The printing space is used; when cutting is required, the cutter push rod switches to the second state, temporarily entering the printing area and the travel range of the nozzle assembly, so that the nozzle assembly can reach the cutting part of the 3D printer's nozzle assembly, which is positioned towards the cutter push rod and moves towards the cutter push rod, so that the cutter push rod abuts against the drive side of the cutter handle of the cutting part, driving the cutter to cut the filament; it is also provided with a drive component linked to the cutter push rod, which controls the rotation and transformation of the cutter push rod between its first state and its second state. Preferably, the drive end of the drive component extends towards the first direction, and the drive end moves and transforms along the first direction to further facilitate the control of the movement and transformation of the drive component.

[0031] With this configuration, the hidden cutting device, the 3D printer using the hidden cutting device, and the operating method provided in this application can completely hide outside the printing area when not cutting, without occupying any printing space, thus greatly improving printing efficiency. Only when preparing to cut is the cutting blade of the hidden cutting device rotated to enter the printing area and enter the movement range of the nozzle assembly with the cutting component to cut the material. The cutting process will not involve printing, so it does not affect the printing efficiency at all. Overall, the printing efficiency is greatly improved. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1 This is a partial structural diagram of the 3D printer provided in the embodiments of this application. Figure 1 ;

[0034] Figure 2 This is a schematic diagram of the structure of the 3D printer provided in the embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the concealed cutting device provided in the embodiments of this application;

[0036] Figure 4 This is an exploded view of the concealed cutting device provided in the embodiments of this application;

[0037] Figure 5 A partial structural diagram of the cutter push rod of the concealed cutting device provided in the embodiments of this application in the first state;

[0038] Figure 6 A partial structural diagram of the cutter push rod of the concealed cutting device provided in the embodiments of this application in the second state;

[0039] Figure 7 This is a schematic diagram of the structure of the buffer gear provided in the embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the structure of the cutter push rod provided in the embodiment of this application;

[0041] Figure 9 This is a partial structural diagram of the concealed cutting device provided in the embodiments of this application. Figure 1 ;

[0042] Figure 10 This is a partial structural diagram of the concealed cutting device provided in the embodiments of this application. Figure 2 ;

[0043] Figure 11 This is a partial structural diagram of the 3D printer provided in the embodiments of this application. Figure 2 ;

[0044] Figure 12 This is a schematic diagram of the impact component impacting the concealed cutting device provided in the embodiment of this application;

[0045] Figure 13 This is a schematic diagram of the structure of the contact assembly provided in an embodiment of this application.

[0046] Figure label:

[0047] 100 - Concealed cutting device;

[0048] 10-Installation body;

[0049] 11-Installation notch;

[0050] 20-Cutter push rod;

[0051] 21-Second buffer oblique cut structure;

[0052] 22-The second convex part;

[0053] 23-Second recess;

[0054] 30-Bumper Block;

[0055] 31-Rack;

[0056] 32 - First end;

[0057] 40-Spindle;

[0058] 50-Buffer Gear;

[0059] 51-First buffer oblique cut structure;

[0060] 52-The first convex part;

[0061] 53-First recess;

[0062] 54-slot;

[0063] 60 - Spring component;

[0064] 61 - Top part;

[0065] 62 - Bottom end;

[0066] 70 - Return torsion spring;

[0067] 80 - Install connecting block;

[0068] 81 - Mounting hole;

[0069] 90-Connector;

[0070] 200-Printing platform;

[0071] 300-Frame Structure;

[0072] 301 - First Y-axis;

[0073] 302 - Second Y-axis;

[0074] 303-X-axis;

[0075] 400 - Nozzle assembly;

[0076] 401 - Cutter Handle;

[0077] 402 - Cutting blade;

[0078] 403 - Silk material;

[0079] 500-impact assembly;

[0080] 600-Adapter. Detailed Implementation

[0081] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0082] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0083] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0084] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0085] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0086] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0087] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0088] like Figure 1 , Figure 2 and Figures 10 to 13 As shown, this application embodiment provides a concealed cutting device 100 and a 3D printer using the concealed cutting device 100. This application embodiment uses a first direction as an example. Figure 1 and Figure 2 Taking the Y-direction as an example, the X-direction is the direction perpendicular to the first direction on the same horizontal plane. The 3D printer includes a printing platform 200, a frame structure 300 that is supported and fixed outside the printing area of ​​the printing platform 200, a nozzle assembly 400 with a cutting component that is slidably connected to the X-axis 303 (that is, the third sliding axis) of the 3D printer, and an impact assembly 500 that is slidably connected to the first Y-axis 301 (that is, the first sliding axis) of the 3D printer. The cutting component can be positioned toward the cutter push rod 20 of the concealed cutting device 100.

[0089] The frame structure 300 has fixed edges on both sides. Figure 1 and Figure 2 The first Y-axis 301 and the second Y-axis 302, which extend in the Y direction, are shown. The first Y-axis 301 is the first sliding axis, the second Y-axis 302 is the second sliding axis, and the X-axis 303 is the third sliding axis. The third sliding axis extends in a direction perpendicular to the horizontal plane of the first direction. The mounting body 10 of the concealed cutting device 100 provided in this application embodiment is embedded and fixedly connected at the corner position of the frame structure 300 connected to the first Y-axis 301. One end of the X-axis 303 is fixedly connected to the impact component 500, and the other end is slidably connected to the second Y-axis 302 through the adapter 600, so as to drive the nozzle assembly 400 slidably connected thereto to move in the Y direction.

[0090] like Figures 1 to 3As shown, the concealed cutting device 100 provided in this application embodiment includes a mounting body 10 fixedly installed within a frame structure 300 surrounding the printing platform 200 of a 3D printer, a cutting rod 20 rotatably connected to the mounting body 10, and a driving member linked to the cutting rod 20. The driving member controls the cutting rod 20 to rotate between its first state and its second state. The cutting rod 20 has a first state located within the periphery of the printing platform 200 (i.e., outside the printing area) and extending along a first direction (e.g., the Y direction), and a second state located within the printing area of ​​the printing platform 200 and extending along a second direction. The second direction can be as follows: Figure 1 and Figure 2 The X-direction shown is perpendicular to the first direction at the same horizontal level. Alternatively, the second direction can be set at an angle greater than 20° to the first direction at the same horizontal level. As long as the cutter push rod 20 rotates to the second direction, the cutter push rod 20 can contact the drive side of the cutter handle of the cutting component, thereby driving the cutter to cut the filament. The first state is the initial state of the cutter push rod 20. When the cutter push rod 20 is switched to the second state, the cutting component of the nozzle assembly 400 of the 3D printer faces the cutter push rod 20.

[0091] Compared with the prior art, the concealed cutting device 100 provided in this application embodiment is applied to a 3D printer. The mounting body 10 of the concealed cutting device 100 is fixedly installed within the frame structure 300 surrounding the printing platform 200 of the 3D printer, located outside the printing area, and does not occupy printing space. The cutting rod 20, which is rotatably connected to the mounting body 10, has a first state located within the periphery of the printing platform 200 and extending along a first direction, and a second state located within the printing area of ​​the printing platform 200 and extending along a second direction. When cutting is not required... When the material is being printed, the cutter push rod 20 is in its initial first state, hidden within the frame structure 300 outside the printing area, without affecting the printing process or occupying printing space. When cutting is required, the cutter push rod 20 switches to its second state, temporarily entering the printing area and the travel range of the nozzle assembly 400, allowing the nozzle assembly 400 to reach the cutting component of the 3D printer's nozzle assembly 400, which is positioned towards and moves toward the cutter push rod 20, causing the cutter push rod 20 to contact the drive side of the cutter handle 401 of the cutting component. Figure 11 The image shows a partial structural diagram of a 3D printer with the nozzle assembly 400 in position and aligned with the cutter push rod 20. At this point, as shown... Figure 13As shown, the cutter push rod 20 can touch the cutter handle 401 and drive the cutter handle 401 forward, while driving the drive cutter 402 connected to the cutter handle 401 to cut the wire material 403; it is also provided with a drive component linked to the cutter push rod 20 to control the cutter push rod 20 to rotate between its first state and its second state. Preferably, the drive end of the drive component extends toward the first direction, and the drive end moves and changes along the first direction to further facilitate the control of the movement and change of the drive component.

[0092] With this configuration, the hidden cutting device 100 and the 3D printer using the hidden cutting device 100 provided in this application embodiment can be completely hidden outside the printing area when not cutting, without occupying any printing space, which greatly improves printing efficiency. Only when preparing to cut is the cutting top rod 20 of the hidden cutting device 100 rotated to enter the printing area, so as to enter the moving range of the nozzle assembly 400 with the cutting component to cut. The cutting process will not be printed, so it does not affect the printing efficiency at all. Overall, the printing efficiency is greatly improved.

[0093] One specific embodiment is, as follows: Figures 1 to 6 As shown, the driving component in the aforementioned embodiment can specifically be configured as a striking block 30 extending along a first direction (e.g., the Y direction). The striking block 30 is mounted on the mounting body 10, and it extends or retracts along the first direction (e.g., the Y direction). The first end 32 of the striking block 30 extends beyond the mounting body 10. When the striking block 30 is struck by an external force (specifically, an impact component 500) and retracts along the first direction (e.g., the Y direction), the cutter push rod 20 transitions from its first state to its second state, as... Figure 12 The diagram shows the structure of the impact component 500 impacting the impact block 30, causing the cutter push rod 20 to be in the second state. When the external force impacting the impact block 30 is removed, the cutter push rod 20 returns from its second state to its first state.

[0094] This configuration allows the impact component 500 to move directly along the Y-axis (specifically, the first Y-axis 301) and strike the first end 32 of the impact block 30. The drive control method is simpler and more efficient. While the impact component 500 strikes the impact block 30, since one end of the impact component 500 is connected to the X-axis 303, it also drives the nozzle assembly 400, which is connected to the X-axis 303 and has a cutting component, to move closer to the hidden cutting device 100. This reduces the distance between the nozzle assembly 400 and the hidden cutting device 100. The two steps are performed simultaneously, improving work efficiency.

[0095] In one alternative embodiment, a gear may be fixedly connected to the bottom of the cutter push rod 20, and a rack 31 may be correspondingly provided on the side wall of the aforementioned impact block 30. The rack 31 and the gear are meshed together to drive the cutter push rod 20 to rotate.

[0096] A preferred embodiment is, as follows: Figures 4 to 8 As shown, the mounting body 10 may also be provided with a vertically arranged rotating shaft 40, and the cutter top rod 20 is rotatably connected to the rotating shaft 40. The rotating shaft 40 is also fitted with a buffer gear 50, which contacts and is positioned opposite to the cutter top rod 20. Specifically, the buffer gear 50 may be located below the cutter top rod 20. The buffer gear 50 may be provided with a first buffer part, specifically, the top of the buffer gear 50 is provided with a first buffer oblique cutting structure 51, which can be the first buffer part. Correspondingly, the cutter top rod 20 may be provided with a second buffer part, specifically, the bottom of the cutter top rod 20 is provided with a second buffer oblique cutting structure 21 that corresponds to and cooperates with the first buffer oblique cutting structure 51, which can be the second buffer part. The side wall of the impact block 30 may be provided with a rack 31, which meshes with the buffer gear 50.

[0097] When the impact block 30 retracts along the Y-axis, the impact block rack 31 drives the buffer gear 50 to rotate. The friction between the buffer gear 50 and the cutter push rod 20 is greater than the friction between the cutter push rod 20 and the mounting body 10, causing the cutter push rod 20 to swing synchronously. When the cutter push rod 20 reaches its position, its swing is restricted, the impact block 30 continues to move, and the first buffer oblique cutting structure 51 of the buffer gear 50 disengages from the second buffer oblique cutting structure 21 of the cutter push rod 20. Figure 6 As shown, the buffer gear 50 and the cutter push rod 20 are temporarily separated, and the excess force given by the excessive stroke of the aforementioned impact block 30 is buffered and consumed, avoiding the Y-axis stroke from being limited and causing the motor to lose steps.

[0098] Furthermore, one specific embodiment is, as follows: Figure 7 As shown, the top surface of the aforementioned buffer gear 50 is preferably a helical surface. Specifically, the top of the buffer gear 50 may be provided with at least one first protrusion 52 and at least one first recess 53 spaced apart, and adjacent first protrusions 52 and first recesses 53 are transitionally connected by a first buffer oblique cut structure 51; correspondingly, as Figure 7 As shown, the bottom surface of the cutter top rod 20 is preferably a spiral surface. Specifically, the bottom of the cutter top rod 20 may be provided with at least one second protrusion 22 and at least one second concave portion 23 spaced apart, and adjacent second protrusions 22 and second concave portions 23 are connected by a second buffer oblique cutting structure 21.

[0099] Regarding the automatic reset method of the cutter push rod 20, a preferred embodiment is as follows: Figure 9 As shown, a spring 60 may also be fitted onto the aforementioned rotating shaft 40. The spring 60 is located below the buffer gear 50, and the bottom of the buffer gear 50 may be provided with a slot 54. The top end 61 of the spring 60 is inserted into and fixed in the slot 54, and the bottom end 62 of the spring 60 is fixedly connected to the mounting body 10. When the impact block 30 retracts and moves into place along the Y-axis, the first buffer oblique cutting structure 51 of the buffer gear 50 disengages from the second buffer oblique cutting structure 21 of the cutter top rod 20 and moves downward to compress the spring 60, retaining elastic potential energy. When the external force applied to the impact block 30 is removed, the elastic potential energy is automatically released, and the impact block 30 and the cutter top rod 20 automatically reset.

[0100] Another preferred embodiment is, as Figure 10 As shown, a reset torsion spring 70 can be sleeved and connected at the connection between the aforementioned rotating shaft 40 and the cutter push rod 20. One end of the reset torsion spring 70 is fixedly connected to the cutter push rod 20, and the other end is fixedly connected to the mounting body 10. The first state of the cutter push rod 20 is its initial reset state.

[0101] In addition, such as Figure 3 and Figure 4 As shown, the concealed cutting device 100 provided in this application embodiment may further include a mounting connecting block 80. The aforementioned cutting top rod 20, driving component (specifically, a striking block 30), rotating shaft 40, buffer gear 50, spring component 60, and reset torsion spring 70 may all be mounted and connected to the mounting connecting block 80. The mounting body 10 is recessed and has a mounting notch 11. The mounting connecting block 80 can be detachably mounted in the mounting notch 11 to facilitate disassembly, maintenance, and replacement of the mounting connecting block 80. Specifically, the mounting connecting block 80 may have a mounting hole 81, which can be detachably and fixedly connected by a connecting member 90, which may specifically be a screw.

[0102] This application also provides an operation method based on any of the aforementioned embodiments of the concealed cutting device 100 and any embodiment of a 3D printer having the concealed cutting device 100. The operation method includes:

[0103] Step 100: Control the impact component 500 to move along the first Y-axis 301 (i.e. the first sliding axis) toward the mounting body 10 of the concealed cutting device 100 and impact the driving end of the driving member of the concealed cutting device 100 (specifically, the first end 32 of the impact block 30), and cause the driving end to retract and move. At the same time, the cutter top rod 20 changes from a first state located in the periphery of the printing platform 200 and extending in the first direction to a second state located in the printing area of ​​the printing platform 200 and extending in the second direction.

[0104] Step 200: The side of the nozzle assembly 400 with the cutting component moves along the X-axis 303 (i.e., the third sliding axis) toward the cutter push rod 20, so that the cutter push rod 20 abuts against the drive side of the cutter handle 401 of the cutting component, and drives the cutter 402 to cut the filament 403.

[0105] Step 300: Control the nozzle assembly 400 to move away from the cutter push rod 20 along the X-axis 303 (i.e., the third sliding axis), and control the impact assembly 500 to move away from the mounting body 10 along the first Y-axis 301 (i.e., the first sliding axis) to disengage from the drive end. The drive end is reset and extended, and at the same time, the cutter push rod 20 returns from the second state to the first state.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A concealed cutting device for use in a 3D printer, characterized in that, include: The main body is fixedly installed within the frame structure surrounding the printing platform of the 3D printer; Rotary cutting rod connected to the mounting body, the cutting rod has a first state located within the periphery of the printing platform and extending in a first direction and a second state located within the printing area of ​​the printing platform and extending in a second direction. When the cutting rod is switched to the second state, the cutting component of the nozzle assembly of the 3D printer faces the cutting rod. as well as A drive component linked to the cutter push rod controls the cutter push rod to rotate between its first state and its second state; The mounting body is provided with a vertically arranged rotating shaft, and a buffer gear is sleeved on the rotating shaft. The cutter top rod is rotatably connected to the rotating shaft and contacts and is arranged opposite to the buffer gear. The driving component extends or retracts along the first direction, and a rack is provided on the side wall of the driving component, which meshes with the buffer gear. The buffer gear is provided with a first buffer oblique cutting structure, and the cutter push rod is provided with a second buffer oblique cutting structure that corresponds to and cooperates with the first buffer part. When the cutter push rod rotates to its second state position, the driving member continues to move along the first direction, and the first buffer oblique cutting structure of the buffer gear disengages from the second buffer oblique cutting structure of the cutter push rod to provide buffering.

2. The concealed cutting device according to claim 1, characterized in that, The top of the buffer gear is provided with at least one first protrusion and at least one first recess, and at least one first buffer portion, which are spaced apart. Adjacent first protrusions and first recesses are transitionally connected by the first buffer portion. Conversely, the bottom of the cutter top rod is provided with at least one second protrusion and at least one second recess, and at least one second buffer portion, with adjacent second protrusions and second recesses being transitionally connected by the second buffer portion.

3. The concealed cutting device according to claim 1, characterized in that, A spring is also fitted on the rotating shaft. The spring is located below the buffer gear, and the bottom of the buffer gear has a slot. The top end of the spring is inserted into and fixed in the slot, and the bottom end of the spring is fixedly connected to the mounting body.

4. The concealed cutting device according to claim 1, characterized in that, A reset torsion spring is sleeved at the connection between the rotating shaft and the cutter top rod. One end of the reset torsion spring is fixedly connected to the cutter top rod, and the other end is fixedly connected to the mounting body. The first state of the cutter top rod is its initial reset state.

5. The concealed cutting device according to any one of claims 1 to 4, characterized in that, The driving component is configured as a striking block extending along a first direction, the striking block being mounted on the mounting body and moving outward or retracting along the first direction, with a first end of the striking block extending beyond the mounting body; and / or Both the first direction and the second direction are horizontal and are set at an angle greater than 20°.

6. The concealed cutting device according to claim 1, characterized in that, It also includes a mounting connection block, on which the cutter top rod and the drive component are mounted, and the mounting body has a recessed mounting notch, into which the mounting connection block can be detachably mounted.

7. A 3D printer, characterized in that, The concealed cutting device includes any one of claims 1 to 6, wherein the driving end of the driving member of the concealed cutting device extends toward a first direction, and the driving end moves and changes along the first direction by extending or retracting. The 3D printer includes a printing platform, a frame structure that is supported and fixed outside the printing area of ​​the printing platform, a nozzle assembly with a cutting component that is slidably connected to a third sliding axis, and an impact assembly that is slidably connected to a first sliding axis. The cutting component is configured to face the cutting top rod of the concealed cutting device. The frame structure has a first sliding shaft and a second sliding shaft that are fixedly arranged on opposite sides, extending along a first direction. The third sliding shaft extends along a direction perpendicular to the same horizontal plane as the first direction. The mounting body of the concealed cutting device is embedded and fixedly connected to the corner of the frame structure that is connected to the first sliding shaft. One end of the third sliding shaft is fixedly connected to the impact component, and the other end is slidably connected to the second sliding shaft through an adapter.

8. An operating method, characterized in that, The method of operation, applied to the 3D printer of claim 7, includes: Step 100: Control the impact component to move along the first sliding axis toward the mounting body of the concealed cutting device and impact the drive end of the drive component of the concealed cutting device, and cause the drive end to retract and move. At the same time, the cutter push rod changes from a first state located in the periphery of the printing platform and extending in the first direction to a second state located in the printing area of ​​the printing platform and extending in the second direction. Step 200: The side of the nozzle assembly with the cutting component moves along the third sliding axis toward the cutter push rod, so that the cutter push rod abuts against the drive side of the cutter handle of the cutting component, driving the cutter to cut the filament. Step 300: Control the nozzle assembly to move away from the cutter push rod along the third sliding axis, control the impact assembly to move away from the mounting body along the first sliding axis to disengage from the drive end, the drive end resets and extends, and at the same time the cutter push rod changes from the second state back to the first state.

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