Multi-jet switching device and 3D printer and its jet switching use method

Abstract

The application relates to the field of 3D printing technology, in particular to a multi-nozzle switching device, a 3D printer and a nozzle switching use method thereof. The multi-nozzle switching device comprises a nozzle seat which is slidably connected to a movement track of the 3D printer and can be moved to a first end portion of the movement track; a nozzle mounting member which is connected to the 3D printer and can be moved along a first direction, and the side of the nozzle mounting member facing the nozzle seat is provided with a plurality of nozzles arranged along the first direction in sequence; the nozzle mounting member is moved along the first direction, and simultaneously drives each nozzle to move along the first direction, so that each nozzle can be moved to a position opposite to the nozzle seat in sequence; and a locking connection mechanism is arranged to lock the nozzle seat and the nozzle opposite to the nozzle seat. The technical problem that the nozzle switching assembly of the existing multi-nozzle 3D printer is limited by the structural frame of the printer, the number of replaceable nozzles is limited by the size of the structural frame of the installable nozzle, and the adaptability is poor is solved.

Description

Technical Field

[0001] This application relates to the field of 3D printing technology, and in particular to a multi-nozzle switching device and a 3D printer and a method for switching nozzles. Background Technology

[0002] Existing multi-nozzle 3D printing technology is often based on the CoreXY structural framework, in which multiple nozzles of the printer are mounted on the structural framework of the printer. When switching nozzles, the nozzle mount moves along the XY plane and is positioned sequentially to the position of each nozzle and connected and fixed to the nozzle, thus realizing the switching of nozzles.

[0003] However, this approach limits the printhead switching component to the printer's structural frame. For example, this type of printhead switching component cannot be directly applied to other common printer frames such as the Prusa i3. It also limits the number of replaceable printheads to the size of the printing device and the size of the structural frame that can accommodate the printheads. Furthermore, traditional multi-printhead mechanisms may have cable interference issues when applied to other printer frames, resulting in poor compatibility. Summary of the Invention

[0004] The purpose of this application is to provide a multi-nozzle switching device and a 3D printer, as well as a method for switching nozzles, to solve the technical problems of existing multi-nozzle 3D printers where the nozzle switching components are limited by the printer's structural frame, and the number of replaceable nozzles is limited by the size of the structural frame on which the nozzles can be installed, resulting in poor adaptability.

[0005] In a first aspect, this application provides a multi-nozzle switching device for use in a 3D printer, comprising: A nozzle holder is slidably connected to the motion track of the 3D printer, and the nozzle holder is movable to a first end position of the motion track; A nozzle mounting component, movable along a first direction and connected to a 3D printer, has a plurality of nozzles arranged sequentially along the first direction mounted on the side of the nozzle mounting component facing the nozzle holder. As the nozzle mounting component moves along the first direction, it simultaneously moves each of the nozzles along the first direction, allowing each nozzle to be sequentially moved to a position opposite to the nozzle holder. A locking connection mechanism is used to lock the nozzle holder and the nozzle opposite it to each other.

[0006] Furthermore, the multi-nozzle switching device also includes: a support connecting base, which is detachably and fixedly connected to the 3D printer, and the nozzle mounting component is movably connected to the support connecting base; The support connection seat includes a seat body and a connecting arm connected to the seat body. The nozzle mounting component is installed on the seat body. The extended end of the connecting arm is fixedly connected to the motion track of the 3D printer near the first end. The seat body is disposed opposite to the first end.

[0007] Furthermore, the seat portion is vertically arranged, one end of the connecting arm is connected to the bottom of the seat portion, and the protruding end of the connecting arm extends at an angle from the bottom of the seat portion away from the seat portion, and is directly or indirectly connected to the outer wall or bottom wall of the first end; and / or When the nozzle holder moves to the first end position, there is no gap or the gap is within ±0.1mm between the nozzle holder and the nozzle opposite it.

[0008] Furthermore, the upper and lower edges of the nozzle mounting component are respectively provided with a first optical rod and a second optical rod extending along the first direction; correspondingly, The upper top and lower bottom of the seat are respectively provided with at least one first roller corresponding to the first light rod and at least one second roller corresponding to the second light rod.

[0009] Furthermore, the multi-nozzle switching device also includes a linear movement control component, which includes a drive motor mounted on the support connecting base on the side of the base body opposite to the nozzle mounting member, and a linear movement structure mounted on the nozzle mounting member on the side opposite to each nozzle, moving along the first direction, wherein the linear movement structure is drivenly connected to the drive motor.

[0010] Furthermore, the linear movement structure is a rack extending along the first direction, and a gear is connected to the output shaft of the drive motor, the gear meshing with the rack; or The linear moving structure is a synchronous belt extending along the first direction, and the output shaft end of the drive motor is connected to a pulley, the tooth groove of the pulley meshing with the tooth structure of the synchronous belt.

[0011] Furthermore, a nozzle sensing circuit board is also embedded within the nozzle mounting component, and both the nozzle sensing circuit board and the drive motor are electrically connected to the control terminal; and / or The linear moving structural component is embedded inside the nozzle mounting component; and / or The nozzle mounting component is provided with at least one positioning pin at the position corresponding to the installation of each nozzle. Each nozzle is installed on the nozzle mounting component by means of the positioning pin, and the positioning pin extends in the direction away from the nozzle mounting component.

[0012] Furthermore, the locking connection mechanism includes a first locking connector disposed on the side of the nozzle holder facing the nozzle for gripping and locking the nozzle, and a second locking connector disposed on the side of each nozzle facing the nozzle holder, capable of locking with the first locking connector.

[0013] Furthermore, the first locking connector is configured as an electromagnet structure, and correspondingly, each of the second locking connectors is configured as a magnetic metal sheet. When the electromagnet structure is energized, it can be magnetically locked to the magnetic metal sheet; when the electromagnet structure is de-energized and demagnetized, it can be unlocked and disconnected from the magnetic metal sheet. The first locking connector is configured as a locking ring, which has a locking position and an unlocking position. Correspondingly, each of the second locking connectors is configured as a locking boss. By switching the locking ring to the locking position or the unlocking position, the locking boss is locked or unlocked to the locking ring.

[0014] Secondly, this application provides a 3D printer, including a motion track and the multi-nozzle switching device described in any one of the preceding statements.

[0015] Furthermore, the motion track includes a transverse rail extending along the second transverse direction and a lifting rail extending along the longitudinal direction. The transverse rail is slidably connected to the lifting rail, and the nozzle seat of the multi-nozzle switching device is slidably connected to the transverse rail. One end of the transverse rail is the first end. Furthermore, the first direction is a first horizontal direction parallel to the horizontal plane, and the first horizontal direction and the second horizontal direction are perpendicular to each other on the same horizontal plane, and the longitudinal direction is perpendicular to both the first horizontal direction and the second horizontal direction.

[0016] Thirdly, this application also provides a method for switching nozzles in a multi-nozzle switching device, applicable to any of the aforementioned multi-nozzle switching devices, the method comprising: Installing a multi-nozzle switching device includes: slidingly connecting the nozzle holder to the motion track of the 3D printer; and fixing the support connecting seat with the nozzle mounting piece to the outer wall or bottom wall of the motion track of the 3D printer near the first end. The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder, moving the nozzle holder to the first end position of the motion track, and unlocking the locking connection mechanism to release the nozzle and nozzle holder from the locking connection.

[0017] Fourthly, this application also provides a method for switching nozzles in a 3D printer, applicable to any of the 3D printers described above, wherein the method for switching nozzles includes: The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder, moving the nozzle holder to the first end position of the motion track, and unlocking the locking connection mechanism to release the nozzle and nozzle holder from the locking connection.

[0018] Compared with the prior art, the multi-nozzle switching device, 3D printer, and nozzle switching method provided in this application have the following advantages: First, the multi-nozzle switching device is set independently outside the structural frame of the 3D printer, and is not limited by the size of the printer's structural frame, nor by the type of structural frame used by the 3D printer (such as CoreXY structural frame, Prissa i3 structural frame, or Printbot structural frame, etc.). It is detachably and fixedly connected to the 3D printer, and can be adapted to any type of structural frame 3D printer, with high adaptability and flexibility.

[0019] Furthermore, the multi-nozzle switching device also includes a nozzle holder for sliding connection to the motion track of the 3D printer. The nozzle holder can be moved to the first end position of the motion track. It also includes a nozzle mounting member connected to the 3D printer and movable in a first direction. Multiple nozzles are mounted on the side facing the nozzle holder in the first direction. When the nozzle mounting member moves in the first direction, it simultaneously drives each nozzle to move in the first direction. Each nozzle can be moved to a position opposite to the nozzle holder. It also includes a locking connection mechanism for locking the nozzle holder and the nozzles opposite to it together.

[0020] When switching is required, the nozzle to be switched can be moved to the corresponding position of the nozzle holder, and at the same time, the nozzle holder can be moved to the first end position of the motion track. The nozzle holder can be locked to the corresponding nozzle through the locking connection mechanism, and the nozzle can be brought onto the motion track to complete the nozzle switching. When the nozzle connected to the nozzle holder needs to be replaced, after the empty spaces on the nozzle holder and the nozzle mounting part corresponding to the nozzle are moved to the switching position, the locking connection mechanism is unlocked, and the replaced nozzle can be returned to its position to complete the switching.

[0021] With this configuration, since each nozzle is mounted on a nozzle mounting component that is independent of the structural frame of the 3D printer, the number of replaceable nozzles in this application is not limited by the size of the structural frame, and multiple nozzle switching can be achieved without limiting the number of nozzles; furthermore, the nozzle switching process is reliable, simple and easy to operate. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of a 3D printer provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a 3D printer provided in another embodiment of this application; Figure 3 This is an exploded view of the structure of the multi-nozzle switching device provided in the first embodiment of this application; Figure 4 This is a schematic diagram of the nozzle and nozzle holder in an unconnected state according to the first embodiment of this application; Figure 5 This is a structural schematic diagram of the connection state between the nozzle and the nozzle holder provided in the first embodiment of this application; Figure 6 This is a structural schematic diagram of the relative state between the second nozzle and the nozzle holder provided in an embodiment of this application; Figure 7 This is a structural schematic diagram showing the relative state of the fourth nozzle and nozzle seat provided in an embodiment of this application; Figure 8 This is a partial structural schematic diagram of a 3D printer provided in another embodiment of this application; Figure 9 This is a schematic diagram of the locking connection mechanism provided in the second embodiment of this application; Figure 10This is an exploded view of the locking connection mechanism provided in the second embodiment of this application; Figure 11 This is a schematic diagram of the locking ring in the locking position according to the second embodiment of this application; Figure 12 This is a schematic diagram of the locking ring in the unlocked position according to the second embodiment of this application; Figure 13 Schematic diagram of the locking ring provided in the second embodiment of this application Figure 1 ; Figure 14 Schematic diagram of the locking ring provided in the second embodiment of this application Figure 2 .

[0024] Figure label: 100-Multi-nozzle switching device; 10-Sprayer head holder; 11-Electromagnetic structure; 20 - Support connector; 21-Connection end; 22-Body part; 221 - First roller; 222 - Second roller; 223 - Drive motor; 23-Connecting arm; 30 - Nozzle mounting hardware; 31-Sprayer head; 311 - First nozzle; 312 - Second nozzle; 313 - Third nozzle; 314 - Fourth nozzle; 316 - Sprayer head cable; 321 - First polished rod; 322 - Second polished rod; 331 - Main locating pin; 332 - Auxiliary locating pin; 34-Rack; 35 - Nozzle sensor circuit board; 40-Slider; 61-Locking connector; 611 - Locking boss; 62-Locking ring; 622 - Drive tooth segment; 63-Driver; 631 - Drive gear; 632 - Geared motor; 64 - Fixed shell; 651-Locking plate; 652 - Locking bevel; 66-stop ring; 67 - Sliding bearing; 201-Gantry; 202 - Lateral rail; 2021 - First end; 203 - Longitudinal lifting rail; 204 - Printing Platform; 205 - Printer stand. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figures 1 to 7 As shown, this application embodiment provides a multi-nozzle switching device 100 and a 3D printer using the multi-nozzle switching device 100. The 3D printer includes a printing platform 204, a printer base 205, and a motion mechanism, which includes a motion track; and different models of 3D printers have different structural frame types, commonly used 3D printer structural frame types include CoreXY structural frame, Prusa i3 structural frame, and Printbot structural frame, etc.

[0033] like Figure 1 As shown, this is an embodiment of a 3D printer using the Prusa i3 structural frame as an example. As shown in the figure, the Prusa i3 structural frame resembles a gantry 201. The gantry 201 is provided with the aforementioned motion track. The motion track includes two longitudinal lifting rails 203 extending along the longitudinal direction c, and a transverse linear rail 202 extending along the second transverse direction b that is slidably connected to the two longitudinal lifting rails 203. The nozzle seat 10 of the multi-nozzle switching device 100 provided in this embodiment is slidably connected to the transverse linear rail 202.

[0034] like Figure 2 As shown in the figure, this is an embodiment of a 3D printer using the Printbot structural frame as an example. Compared to the Prusa i3 structural frame (gantry 201) of the previous embodiment, the Printbot structural frame only lacks one longitudinal lifting rail 203, having one longitudinal lifting rail 203 and one transverse linear rail 202. The nozzle holder 10 of the multi-nozzle switching device 100 provided in this embodiment is slidably connected to the transverse linear rail 202. As can be seen from the two 3D printer structural frame types exemplified in this application, the multi-nozzle switching device 100 provided in this embodiment is not limited by the structural frame type of the 3D printer, exhibiting high adaptability and flexibility.

[0035] like Figures 1 to 3 As shown, the multi-nozzle switching device 100 provided in this application embodiment may include a nozzle seat 10, a support connecting seat 20, a nozzle mounting member 30 movably mounted on the support connecting seat 20, and a locking connection mechanism that locks the nozzle seat 10 and the nozzle 31 opposite thereto into place.

[0036] The nozzle mounting component 30 has a plurality of nozzles 31 movably mounted on the side facing the nozzle seat 10, arranged sequentially along a first direction (as shown in the first transverse direction a in the figure). "Movably mounted" means that the nozzles 31 can be detached from the nozzle mounting component 30 under the action of external force. Specifically, the nozzle mounting component 30 can be a nozzle dock structure.

[0037] The nozzle holder 10 is slidably connected to the motion track of the 3D printer, specifically to the aforementioned transverse linear track 202. The nozzle holder 10 can move to the first end position of the motion track (specifically, the transverse linear track 202), which can be either the left or right end of the transverse linear track 202. Figure 2 The first end position 2021 is shown.

[0038] One end 21 of the support connector 20 can be fixedly connected to the motion track (specifically, the horizontal linear track 202) of the 3D printer near its first end, and the seat body 22 is disposed opposite to the first end. Specifically, as shown... Figure 2 As shown, one possible implementation is that the connecting end 21 of one end of the support connecting seat 20 can be directly fixedly connected to the outer wall or bottom wall of the first end of the motion track of the 3D printer; such as Figure 8 As shown, another possible implementation is that the connecting end 21 of one end of the support connecting seat 20 can be indirectly connected to the outer wall or bottom wall of the first end of the transverse rail 202 through the slider 40. Specifically, the upper end face of the connecting end 21 can be connected to the lower end face of the slider 40, and the upper end face of the slider 40 can be connected to the bottom wall of the corresponding first end of the transverse rail 202. The slider 40 is also slidably connected to the longitudinal lifting rail 203.

[0039] Furthermore, the other end of the support connector 20, the seat portion 22, can be connected to the aforementioned nozzle mounting member 30, which is movable along a first direction. As the nozzle mounting member 30 moves along the first direction, it drives each nozzle 31 to move along the first direction, allowing each nozzle 31 to be sequentially moved to a position opposite to the nozzle seat 10. Preferably, the first direction is a first transverse direction a parallel to the horizontal plane; more preferably, the first transverse direction a and the aforementioned second transverse direction b are perpendicular to each other on the same horizontal plane, and the aforementioned longitudinal direction c is perpendicular to both the first transverse direction a and the second transverse direction b. Additionally, a nozzle cable 316 extends from the top of each nozzle 31, and the nozzle cable 316 can be connected to a junction box via a nozzle cable connector.

[0040] The locking connection mechanism may specifically include a first locking connector disposed on the side of the nozzle holder 10 facing the nozzle 31 for gripping and locking the nozzle 31, and a second locking connector installed on the side of each nozzle 31 facing the nozzle holder 10, which can be locked and connected with the first locking connector.

[0041] In one specific embodiment, the support connecting seat 20 may include a seat body 22 and a connecting arm 23 connected to the bottom of the seat body 22. The seat body 22 may be arranged longitudinally, and the connecting arm 23 is bent from the bottom of the seat body 22 and extends at an angle in a direction away from the seat body 22. The extended end of the connecting arm 23 is the aforementioned connecting end 21.

[0042] Compared with the prior art, the multi-nozzle switching device 100 and the 3D printer using it provided in this application embodiment are independently set outside the structural frame of the 3D printer. They are not limited by the structural frame of the printer, nor by the type of structural frame used by the 3D printer (such as CoreXY structural frame, Prissa i3 structural frame or Printbot structural frame, etc.). It can be detachably fixed to the outer wall or bottom wall of the end of the motion track of any structural frame of the 3D printer through the connecting end 21 of the support connecting seat 20. It has high adaptability and high flexibility.

[0043] Furthermore, the nozzle holder 10 of the multi-nozzle switching device 100 can be moved to the first end position of the motion track. Specifically, the nozzle mounting member 30 can move relative to the seat body 22 of the support connecting base 20 along a first direction, and simultaneously drive each nozzle 31 to move along the first direction. Each nozzle 31 can be moved to a position opposite to the nozzle holder 10, that is, a position above the first end of the motion track. Therefore, the nozzle 31 that needs to be switched can be moved to the position opposite to the nozzle holder 10. Preferably, when the nozzle holder 10 moves... When the first end is in position, there is no gap or the gap between the nozzle seat 10 and the nozzle 31 opposite it is controlled within ±0.1mm, which is basically no gap, so that the nozzle 31 can directly dock with the nozzle seat 10; it also includes a locking connection mechanism for locking the nozzle seat and the nozzle opposite it to each other, specifically including a first locking connector for gripping and locking the nozzle 31 on the side of the nozzle seat 10 facing the nozzle 31, and a second locking connector that can be gripped and locked by the first locking connector on the side of each nozzle 31 facing the nozzle seat 10.

[0044] When the nozzle 31 to be switched moves to the corresponding position of the nozzle holder 10, the nozzle holder 10 can be locked to the nozzle 31 by the first locking connector and the second locking connector, and the nozzle 31 is brought to the motion track (such as the horizontal rail 202) to complete the switching of the nozzle 31. When the nozzle 31 connected to the nozzle holder 10 needs to be replaced, after the empty spaces on the nozzle holder 10 and the nozzle mounting part 30 corresponding to the nozzle 31 are moved to the switching position, the first locking connector and the second locking connector are unlocked, and the replaced nozzle 31 can be returned to its position to complete the switching.

[0045] With this configuration, the printhead 31 can be easily expanded, and the number of printheads 31 is not limited by the structural frame size of the printer, enabling multi-printhead switching without limiting the number of printheads 31; furthermore, the printhead switching process in this embodiment is simpler, more reliable, more convenient, and easier to operate.

[0046] Regarding the aforementioned locking connection mechanism, this application provides two specific embodiments for detailed explanation: First Embodiment like Figures 3 to 5 As shown, the first locking connector of the aforementioned nozzle holder 10 can be configured as an electromagnet structure 11; the second locking connector of each of the aforementioned nozzles 31 can be correspondingly configured as a magnetic metal sheet (not shown in the attached figure). Figure 5 As shown, the electromagnet structure 11, when energized, can be magnetically locked to the magnetic metal sheet, as... Figure 4 As shown, the electromagnet structure 11 can be demagnetized when de-energized and can be unlocked and disconnected from the magnetic metal plate.

[0047] By using magnetic attraction, on the one hand, the nozzle holder 10 and the nozzle can be reliably locked and unlocked. On the other hand, when the nozzle 31 to be replaced moves to a position opposite to the nozzle holder 10, the nozzle 31 can automatically move toward the nozzle holder 10 and be attracted within a short distance due to the magnetic attraction, thus achieving automatic locking and further facilitating operation. This makes it easier for the nozzle holder 10 to bring the nozzle 31 onto the movement track to complete the nozzle switching.

[0048] Second Embodiment The locking connection mechanism can also adopt a snap-fit ​​locking structure.

[0049] like Figures 9 to 12As shown, the locking connection mechanism may specifically include a locking connector 61 with a locking boss 611, a locking ring 62, a locking structure, and a driving member 63. The locking connector 61 is disposed on the nozzle 31 and has a locking boss 611. The aforementioned second locking connection members are the locking boss 611. The aforementioned first locking connection member is the locking ring 62. The driving member 63 and the locking ring 62 are disposed on the nozzle seat 10. The locking structure is disposed inside the locking ring 62. The driving member 63 can drive the locking ring 62 to rotate so that the locking ring 62 has a locked position (e.g., Figure 11 (as shown) and unlock location (as shown) Figure 12 As shown), when the locking ring 62 is in the unlocked position, the locking boss 611 can pass through the locking ring 62. When the locking ring 62 is in the locked position, the locking structure can be engaged between the locking boss 611 and the nozzle 31 and abut against the locking boss 611 to lock the nozzle 31 and the nozzle seat 10.

[0050] The nozzle 31 and nozzle holder 10 are connected via the locking connection mechanism of the second embodiment, facilitating quick assembly and disassembly. When the driving member 63 drives the locking ring 62 to the unlocked position, the nozzle 31 is connected to the nozzle holder 10, allowing the locking boss 611 of the locking connector 61 to pass through the locking ring 62. Then, the driving member 63 drives the locking ring 62 to rotate to the locked position. At this time, the locking structure provided inside the locking ring 62 can engage between the locking boss 611 and the nozzle 31 and abut against the locking boss 611, thereby locking the nozzle 31 and the nozzle holder 10. When the nozzle 31 needs to be replaced, the driving member 63 drives the locking ring 62 to rotate from the locked position to the unlocked position, causing the locking boss 611 to disengage from the locking ring 62, thus completing the separation of the nozzle 31 from the nozzle holder 10.

[0051] Each printhead 31 that can be quickly docked is locked to the printhead base 10 by rotating the locking ring 62. There is no wear during the process, so the accuracy of use will not be affected, thus ensuring the quality of the printed products.

[0052] In this second embodiment, as Figure 9 and Figure 10 As shown, the locking connection mechanism may further include a fixed housing 64, which is detachably disposed within the nozzle holder 10. A locking ring 62 is rotatably disposed within the fixed housing 64, and the locking ring 62 and the fixed housing 64 are slidably connected via a sliding bearing 67 to reduce friction between them. The driving component 63 also includes a reduction motor 632, which is fixedly disposed within the fixed housing 64, and its output shaft is coaxially and fixedly connected to the drive gear 631. The fixed housing 64 allows the various structures of the second locking mechanism to form a module, facilitating maintenance and replacement, and reducing costs.

[0053] To ensure that the locking ring 62 does not come out of the fixing housing 64, the fixing housing 64 may also be provided with a retaining ring 66. The retaining ring 66 slides against the side of the locking ring 62 facing the nozzle 31 to ensure the integrity of the locking connection mechanism.

[0054] like Figures 9 to 14 As shown, the aforementioned locking structure may specifically include a locking plate 651 disposed on the inner wall of the locking ring 62. Along the docking direction between the nozzle 31 and the nozzle seat 10, when the locking ring 62 is in the unlocked position, the locking plate 651 and the locking protrusion 611 are offset. At this time, when the nozzle seat 10 and the nozzle 31 are docked, the locking connector 61 can pass through the locking ring 62, and the locking plate 651 will not block the locking protrusion 611. When the locking ring 62 is in the locked position, the locking plate 651 and the locking protrusion 611 partially overlap. If the locking connector 61 passes through the locking ring 62, the locking plate 651 can block the locking protrusion 611. At this time, the locking connector 61 cannot exit the locking ring 62, thereby achieving the locking between the nozzle seat 10 and the nozzle 31.

[0055] Furthermore, the locking structure may include two locking plates 651 that are centrally symmetrical with respect to the axis of the locking ring 62, and the locking connector 61 has two locking bosses 611 that correspond one-to-one with the two locking plates 651. The cooperation between the two locking plates 651 and the two locking bosses 611 ensures that the locking force is evenly distributed while locking the printhead seat 10 and the printhead 31, preventing the printhead 31 from shifting and ensuring printing accuracy.

[0056] Understandably, in order to ensure that the nozzle 31 remains stable after being locked onto the nozzle holder 10, there must be no gap between the locking plate 651 and the locking boss 611 when the locking ring 62 is in the locked position. They need to abut against each other. However, this makes it difficult for the locking plate 651 to be engaged between the locking boss 611 and the nozzle 31 by the rotation of the locking ring 62.

[0057] To solve the above problems, such as Figure 13 and Figure 14 As shown, a first locking slope 652 may be provided on the side of the locking plate 651 away from the nozzle 31. Along the rotation direction of the locking ring 62 from the unlocked position to the locked position, the first locking slope 652 is inclined towards the nozzle 31.

[0058] In other words, when the locking ring 62 moves from the unlocked position to the locked position, there is a gap between the first locking ramp 652 and the locking boss 611, which facilitates the first locking ramp 652 engaging between the locking boss 611 and the nozzle 31. As the locking ring 62 rotates, the first locking ramp 652 gradually abuts against the locking boss 611, thereby locking the nozzle holder 10 and the nozzle 31.

[0059] like Figures 9 to 14As shown, the aforementioned locking ring 62 may specifically include a drive gear segment 622, and the drive member 63 includes a drive gear 631. The drive gear segment 622 and the drive gear 631 mesh. The drive gear 631 is driven to rotate by a reduction motor 632, thereby causing the locking ring 62 to rotate.

[0060] Furthermore, the fixed housing 64 has a limiting notch, the locking ring 62 has a limiting protrusion, and the drive gear segment 622 is located on the limiting protrusion. The limiting protrusion meshes with the drive gear 631 through the limiting notch. The limiting notch can limit the rotation angle of the locking ring 62. When the limiting protrusion abuts against one side of the limiting notch, the locking ring 62 is in the unlocked position. When the limiting protrusion abuts against the other side of the limiting notch, the locking ring 62 is in the locked position.

[0061] To simplify the structure, the drive tooth segment 622 can be set on the limiting protrusion. Since the limiting protrusion can extend out of the fixed shell 64, it is easy to contact and mesh with the drive gear 631.

[0062] In a further embodiment, the nozzle mounting component 30 is provided with at least one positioning pin at the position corresponding to the installation of each nozzle 31. Each nozzle 31 is installed on the nozzle mounting component 30 by means of the positioning pin, and each positioning pin extends along the direction away from the nozzle mounting component 30, so that the nozzle 31 can move along the direction of the positioning pin. The positioning pin has the functions of supporting and fixing and limiting movement.

[0063] Furthermore, the aforementioned nozzle mounting component 30 is provided with at least two locating pins for each nozzle 31, such as... Figure 3 As shown, it may specifically include a main positioning pin 331 and an auxiliary positioning pin 332 to further strengthen the supporting, fixing and limiting movement functions of the stabilizing positioning pin.

[0064] Another preferred embodiment is, as Figure 3 As shown, the upper and lower edges of the nozzle mounting component 30 may be respectively provided with a first guide rod 321 and a second guide rod 322 extending along a first direction; correspondingly, the upper top and lower bottom of the base portion 22 of the supporting connecting seat 20 may be respectively provided with at least one first roller 221 corresponding to the first guide rod 321 and at least one second roller 222 corresponding to the second guide rod 322. This allows the nozzle mounting component 30 to move relative to the base portion 22 along the first direction, while the cooperation of the guide rod and the roller reduces friction and makes the movement smoother. Specifically, as shown... Figure 3 As shown, this embodiment of the application is illustrated by taking an example with two first rollers 221 and two second rollers 222.

[0065] Furthermore, the multi-nozzle switching device 100 provided in this application embodiment also includes a linear movement control component. The linear movement control component includes a drive motor 223 mounted on the side of the seat portion 22 opposite to the nozzle mounting member 30 on the support connecting base 20, and a linear movement structure mounted on the side of the nozzle mounting member 30 opposite to each nozzle 31 that moves along a first direction. The linear movement structure is driven and connected to the drive motor 223 so that the nozzle mounting member 30 can move relative to the seat portion 22 along the first direction.

[0066] Specifically, one optional embodiment is as follows: Figure 3 As shown, the linear movement structure is a rack 34 extending along the first direction. The output shaft of the drive motor 223 is connected to a gear, which meshes with the rack 34. The meshing connection between the gear and the rack 34 ensures high reliability of linear movement. Preferably, the rack 34 is embedded in the inside of the nozzle mounting part 30 on the side opposite to the nozzle 31.

[0067] Another optional embodiment is that the linear movement structure can be a synchronous belt extending along the first direction, with a pulley connected to the output shaft end of the drive motor 223. The surface of the synchronous belt is machined with a uniformly distributed tooth structure, and the tooth groove of the pulley meshes with the tooth structure of the synchronous belt. Similarly, the linear movement has high reliability. Preferably, the pulley is embedded in the inside of the nozzle mounting part 30 on the side away from the nozzle 31.

[0068] To improve intelligent control, such as Figure 3 As shown, a nozzle sensing circuit board 35 may also be embedded in the aforementioned nozzle mounting component 30. The nozzle sensing circuit board 35 and the drive motor 223 are both electrically connected to the control terminal. The nozzle sensing circuit board 35 can sense whether the nozzle 31 to be switched has moved into place and transmit the information to the control terminal. The nozzle holder 10 can also be electrically connected to the control terminal. When the nozzle 31 needs to be replaced, the control terminal can control the nozzle holder 10 to move to the switching position, that is, the first end of the movement track. At the same time, the control terminal can also control the drive motor 223 to drive the nozzle mounting component 30 to move along the first direction, so that the corresponding nozzle or the empty space of the nozzle moves to the switching position, that is, the position opposite to the nozzle holder 10.

[0069] like Figure 6 and Figure 7 As shown in the illustration, this application takes the example of a nozzle mounting component 30 equipped with four nozzles 31 arranged sequentially along a first direction for specific description. These four nozzles 31 are respectively the first nozzle 311, the second nozzle 312, the third nozzle 313, and the fourth nozzle 314. Figure 6 As shown, this is the state after the nozzle holder 10 has unlocked and replaced the second nozzle 312, which was locked to it, and moved it back into the empty space on its corresponding nozzle mounting piece 30. Figure 7As shown, the nozzle mounting component 30 moves along the first direction until the fourth nozzle 314 to be replaced is positioned opposite the nozzle holder 10 and locked in place with the nozzle holder 10, thus completing the nozzle switching process, from the second nozzle 312 to the fourth nozzle 314.

[0070] This application also provides a method for switching nozzles using a multi-nozzle switching device, the method comprising: Installing a multi-nozzle switching device includes: slidingly connecting the nozzle holder to the motion track of the 3D printer; and fixing the support connecting seat with the nozzle mounting piece to the outer wall or bottom wall of the motion track of the 3D printer near the first end. The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end position of the motion track; unlocking the locking connection mechanism to release the nozzle and the nozzle holder from the locking connection; and the replaced nozzle automatically returning to the nozzle slot.

[0071] The nozzle switching method of this multi-nozzle switching device is not limited by the type of printer frame structure. It can be used with 3D printers that are connected to any type of frame structure. It has high adaptability and flexibility, and it is convenient to switch nozzles. The nozzle switching process is reliable, simple and easy to operate. Furthermore, the number of replaceable nozzles is not limited by the size of the frame structure, and it can realize multi-nozzle switching without limiting the number of nozzles.

[0072] This application also provides a method for switching nozzles on a 3D printer, the method comprising: The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder, moving the nozzle holder to the first end position of the motion track, and unlocking the locking connection mechanism to release the nozzle and nozzle holder from the locking connection.

[0073] 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 multi-jet switching device applied to a 3D printer, characterized in that, include: A nozzle holder is slidably connected to the motion track of the 3D printer, and the nozzle holder is movable to a first end position of the motion track; A nozzle mounting component is movable along a first direction and connected to a 3D printer. A plurality of nozzles are mounted on the side of the nozzle mounting component facing the nozzle base, arranged sequentially along the first direction. As the nozzle mounting component moves along the first direction, it drives each nozzle to move along the first direction, so that each nozzle can be moved sequentially to a position opposite to the nozzle base. as well as A locking connection mechanism is used to lock the nozzle holder and the nozzle opposite it to each other.

2. The multi-jet switching device of claim 1, wherein Also includes: A support connector is provided, which is detachably and fixedly connected to the 3D printer, and the nozzle mounting component is movably connected to the support connector. The support connection seat includes a seat body and a connecting arm connected to the seat body. The nozzle mounting component is installed on the seat body. The extended end of the connecting arm is fixedly connected to the motion track of the 3D printer near the first end. The seat body is disposed opposite to the first end.

3. The multi-nozzle switching device according to claim 2, characterized in that, The seat portion is vertically arranged, one end of the connecting arm is connected to the bottom of the seat portion, and the protruding end of the connecting arm extends at an angle from the bottom of the seat portion away from the seat portion, and is directly or indirectly connected to the outer wall or bottom wall of the first end portion; and / or When the nozzle holder moves to the first end position, there is no gap or the gap is within ±0.1mm between the nozzle holder and the nozzle opposite it.

4. The multi-nozzle switching device according to claim 2 or 3, characterized in that, The nozzle mounting component has a first optical rod and a second optical rod extending along the first direction on its upper and lower edges, respectively; correspondingly, The upper top and lower bottom of the seat are respectively provided with at least one first roller corresponding to the first light rod and at least one second roller corresponding to the second light rod.

5. The multi-jet switching device of claim 4, wherein It also includes a linear motion control assembly, which includes a drive motor mounted on the side of the base portion of the support connecting seat away from the nozzle mounting member, and a linear motion structure mounted on the nozzle mounting member away from each of the nozzles and moving along the first direction, the linear motion structure being drivenly connected to the drive motor.

6. The multi-nozzle switching device according to claim 5, characterized in that, The linear moving structure is a rack extending along the first direction, and the output shaft of the drive motor is connected to a gear, which meshes with the rack; or The linear moving structure is a synchronous belt extending along the first direction, and the output shaft end of the drive motor is connected to a pulley, the tooth groove of the pulley meshing with the tooth structure of the synchronous belt.

7. The multi-nozzle switching device according to claim 5, characterized in that, The nozzle mounting bracket also houses a nozzle sensing circuit board, and both the nozzle sensing circuit board and the drive motor are electrically connected to the control terminal; and / or The linear moving structural component is embedded inside the nozzle mounting component; and / or The nozzle mounting component is provided with at least one positioning pin at the position corresponding to the installation of each nozzle. Each nozzle is installed on the nozzle mounting component by means of the positioning pin, and the positioning pin extends in the direction away from the nozzle mounting component.

8. The multi-nozzle switching device according to claim 1, characterized in that, The locking connection mechanism includes a first locking connector disposed on the side of the nozzle holder facing the nozzle for gripping and locking the nozzle, and a second locking connector disposed on the side of each nozzle facing the nozzle holder, capable of locking with the first locking connector.

9. The multi-nozzle switching device according to claim 8, characterized in that, The first locking connector is configured as an electromagnet structure, and correspondingly, each of the second locking connectors is configured as a magnetic metal sheet. When the electromagnet structure is energized, it can be magnetically locked to the magnetic metal sheet; when the electromagnet structure is de-energized and demagnetized, it can be unlocked and disconnected from the magnetic metal sheet. The first locking connector is configured as a locking ring, which has a locked position and an unlocked position. Correspondingly, each of the second locking connectors is configured as a locking boss. By switching the locking ring to the locked position or the unlocked position, the locking boss is locked or unlocked to the locking ring.

10. A 3D printer characterized by, It includes a motion track and a multi-nozzle switching device as described in any one of claims 1 to 9.

11. The 3D printer of claim 10, wherein, The motion track includes a transverse rail extending in the second transverse direction and a lifting rail extending in the longitudinal direction. The transverse rail is slidably connected to the lifting rail. The nozzle seat of the multi-nozzle switching device is slidably connected to the transverse rail. One end of the transverse rail is the first end. Furthermore, the first direction is a first horizontal direction parallel to the horizontal plane, and the first horizontal direction and the second horizontal direction are perpendicular to each other on the same horizontal plane, and the longitudinal direction is perpendicular to both the first horizontal direction and the second horizontal direction.

12. A method of switching a plurality of nozzles of a multi-nozzle switching device, characterized by, The multi-nozzle switching device applied to any one of claims 1 to 9, wherein the nozzle switching method comprises: Installing a multi-nozzle switching device includes: slidingly connecting the nozzle holder to the motion track of the 3D printer; and fixing the support connecting seat with the nozzle mounting piece to the outer wall or bottom wall of the motion track of the 3D printer near the first end. The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder, moving the nozzle holder to the first end position of the motion track, and unlocking the locking connection mechanism to release the nozzle and nozzle holder from the locking connection.

13. A method for switching nozzles in a 3D printer, characterized in that, The nozzle switching method, applicable to any one of claims 10-11, comprises: The nozzle connection process includes: moving the nozzle mounting piece so that the nozzle to be connected is moved to a position opposite to the nozzle holder; moving the nozzle holder to the first end of the motion track; then locking the nozzle and the nozzle holder together using the locking connection mechanism; and after the nozzle connection is completed, controlling the nozzle holder to leave the first end allows the nozzle to be carried along with the nozzle to the motion track for use. The process of replacing the nozzle includes: moving the nozzle mounting piece so that the nozzle slot on it is moved to a position opposite to the nozzle holder, moving the nozzle holder to the first end position of the motion track, and unlocking the locking connection mechanism to release the nozzle and nozzle holder from the locking connection.

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