3D printing cleaning mechanism, 3D printing equipment and 3D printing cleaning method

Abstract

The invention discloses a cleaning mechanism for 3D printing, 3D printing equipment and a cleaning method for 3D printing. The cleaning mechanism for 3D printing comprises a mounting body; the nozzle wiping driving structure is movably mounted on the mounting body, the nozzle wiping driving structure is provided with a nozzle wiping driving part and a nozzle wiping part, the nozzle wiping driving part and the nozzle wiping part are spaced, and the nozzle wiping part is used for wiping a nozzle of a tool head; wherein the cleaning nozzle driving part is suitable for driving the cleaning nozzle driving structure to move relative to the mounting body so as to drive the cleaning nozzle part to be switched from one cleaning position to another cleaning position, and the one cleaning position and the another cleaning position are at least different in the height direction. According to the cleaning mechanism for 3D printing, multiple nozzles with different heights of a tool head of a printer can be effectively wiped and cleaned, and the stability and durability of the printing quality are ensured.

Description

[0001] Cross - reference to related applications

[0002] This application is based on and claims priority to the PCT patent application with application number PCT / CN2024 / 108013, filing date July 27, 2024, and title "A waste removal device for 3D printers and 3D printers". The entire content of the above - mentioned PCT patent application is incorporated herein by reference. Technical field

[0003] The present invention relates to the field of printing technology, and in particular, to a cleaning mechanism for 3D printing, a 3D printing device having the cleaning mechanism for 3D printing, and a cleaning method for 3D printing applicable to the cleaning mechanism. Background art

[0004] In 3D printing, the cleaning mechanism for 3D printing can clean the waste flushed during the nozzle material change process and the waste adhered to the surface of the nozzle during the printing process.

[0005] However, the cleaning mechanisms in the prior art can only clean the waste generated by one nozzle and the waste adhered to the surface of one nozzle. In multi - color printing with dual nozzles, how to make the cleaning mechanism applicable to different nozzles and ensure reliability and cleaning effect has become a key technical problem. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, the present invention provides a cleaning mechanism for 3D printing, and the cleaning mechanism for 3D printing can effectively wipe and clean nozzles at different heights of the tool head of the printer, ensuring the stability and durability of the printing quality.

[0007] The cleaning mechanism for 3D printing according to an embodiment of the present invention includes: a mounting body; a nozzle - wiping driving structure, the nozzle - wiping driving structure is movably mounted on the mounting body, the nozzle - wiping driving structure is provided with a nozzle - wiping driving member and a nozzle - wiping member, and the nozzle - wiping driving member and the nozzle - wiping member are spaced apart; wherein, the nozzle - wiping driving member is adapted to drive the nozzle - wiping driving structure to move relative to the mounting body, so as to drive the nozzle - wiping member to switch from one wiping position to another wiping position, and the nozzle - wiping member is used to wipe the nozzle of the printer at the wiping position, and the one wiping position and the other wiping position are at least different in the height direction.

[0008] The cleaning mechanism for 3D printing according to an embodiment of the present invention installs a wiping nozzle driving member and a wiping nozzle member on the wiping nozzle driving structure, so that when the wiping nozzle driving member is triggered, the wiping nozzle driving member can drive the wiping nozzle driving structure to move relative to the mounting body, so as to drive the wiping nozzle member to switch from one wiping position to another wiping position, realizing effective wiping and cleaning of nozzles with different heights of the tool head of the printer, and ensuring the stability and durability of the printing quality.

[0009] For the cleaning mechanism for 3D printing according to some embodiments of the present invention, the wiping nozzle driving member and the wiping nozzle member are respectively arranged at two ends of the wiping nozzle driving structure, and the middle part of the wiping nozzle driving structure is rotatably connected to the mounting body; or, the wiping nozzle driving structure is rotatably installed on the mounting body, and both the wiping nozzle driving member and the wiping nozzle member are arranged on one side of the rotating shaft of the wiping nozzle driving structure; or, the wiping nozzle driving structure is slidably connected to the mounting body, the wiping nozzle driving member drives the wiping nozzle member to switch from the one wiping position to the other wiping position, and the wiping nozzle member is adapted to switch from the other wiping position to the one wiping position under the action of gravity, magnetism and / or elasticity.

[0010] For the cleaning mechanism for 3D printing according to some embodiments of the present invention, the wiping nozzle member is detachably installed on the wiping nozzle driving structure; and / or, the other wiping position is higher than the one wiping position in the height direction; and / or, one of the wiping nozzle member and the wiping nozzle driving structure is provided with a limiting protrusion and the other is provided with a limiting groove, and the inserting direction of the limiting protrusion and the limiting groove intersects with the wiping direction of the nozzle.

[0011] For the cleaning mechanism for 3D printing according to some embodiments of the present invention, the wiping nozzle member is formed with a wiping groove, the nozzle of the tool head is adapted to pass through the wiping nozzle member from the wiping groove, the tool head is provided with a triggering part, and there are two nozzles of the tool head, and the two nozzles are adapted to enter the wiping groove in sequence; wherein, the triggering part is set to trigger the wiping nozzle driving member during partial strokes when the two nozzles enter the wiping groove successively, so that the height position of the wiping groove corresponds to the height position of the nozzle.

[0012] For the cleaning mechanism for 3D printing according to some embodiments of the present invention, one of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle; the rotating shaft of the wiping nozzle driving structure is located between the wiping nozzle member and the wiping nozzle driving member, the height of the wiping nozzle member in the initial state corresponds to the lowest position or the working position of the lifting nozzle, and the triggering part is used to drive the wiping nozzle member to rise; or, the rotating shaft of the wiping nozzle driving structure is located on one side of the wiping nozzle driving member and the wiping nozzle member, the triggering part is used to drive the wiping nozzle member to lower, and the initial state of the wiping nozzle member corresponds to the position of the fixed nozzle.

[0013] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, one of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle. When the wiping member is directly opposite to the lifting nozzle in the wiping direction, the triggering portion is used to drive the wiping member to lower or the wiping member is in the lowest position; and / or, when the wiping member is directly opposite to the fixed nozzle in the wiping direction, the triggering portion is used to drive the wiping member to rise or the wiping member is in the highest position.

[0014] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, the wiping member is located on one side of the fixed nozzle, and the triggering portion is centrally arranged relative to the tool head; wherein, in the projection along the first direction, the center of the triggering portion is located in the middle between the centers of the two nozzles, and the distance between the center of the triggering portion and the center of the nozzle is between 2 and 15 mm, and / or, in the projection along the first direction, the ratio of the distance D1 between the center projection of the triggering portion and the wiping member to the distance D2 between the centers of the two nozzles is between 0.4 and 0.6.

[0015] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, the triggering portion is configured as a triggering protrusion, and the triggering protrusion has a guiding inclined surface, and the guiding inclined surface is adapted to push the wiping driving member.

[0016] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, the wiping driving member is configured as an active member, and the wiping driving member is used to actively drive the wiping driving structure to drive the wiping member to move.

[0017] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, the cleaning mechanism of 3D printing further includes a first elastic member, the first elastic member is connected between the wiping driving structure and the mounting body, and the first elastic member is used to apply an elastic force to the wiping driving structure to switch the wiping member from the other wiping position to the one wiping position, and the one wiping position is lower than the other wiping position.

[0018] For the cleaning mechanism of 3D printing according to some embodiments of the present invention, the cleaning mechanism of 3D printing further includes a scraping driving structure, the scraping driving structure is movably mounted on the mounting body, and the scraping driving structure is provided with a scraping driving member and a scraping member; wherein, the scraping driving member is adapted to drive the scraping member to move relative to the mounting body to drive the scraping member to move from one scraping position to another scraping position, and the scraping member includes two scraping edges, and the two scraping edges are at least different in the height direction.

[0019] The cleaning mechanism for 3D printing according to some embodiments of the present invention, one of the two scraping edges is higher than the other scraping edge; wherein, the tool head is provided with two nozzles, one of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle, the lifting nozzle is in a working state when it is at the lower limit position, and the lifting nozzle is lower than the fixed nozzle when it is at the lower limit position.

[0020] The cleaning mechanism for 3D printing according to some embodiments of the present invention, the mounting body is provided with a waste receiving surface, the waste receiving surface includes two waste receiving areas, one of the two waste receiving areas is higher than the other, and the two scraping edges are adapted to scrape the two waste receiving areas in a one-to-one correspondence; and / or, in the projection along the moving direction of the scraping member, the scraping driving member is located between the two scraping edges; and, the mounting body includes a blanking port, the blanking port and the waste receiving surface are distributed along the moving direction of the scraping member; wherein, the scraping member is further connected with a second elastic member, the scraping driving member is adapted to push the scraping member to move from the blanking port to one side of the waste receiving surface, and the second elastic member is used to drive the scraping member to move from one side of the waste receiving surface to the blanking port after the scraping driving member removes the thrust; and / or, the scraping driving structure is located at the rear side of the blanking port.

[0021] The cleaning mechanism for 3D printing according to some embodiments of the present invention, the scraping driving structure is configured as a frame structure and forms a scraping avoidance space, at least part of the blanking port is located in the scraping avoidance space.

[0022] The cleaning mechanism for 3D printing according to some embodiments of the present invention, the scraping driving structure includes a scraping connecting rod and a sliding block, the scraping driving member is connected with the scraping connecting rod, the scraping connecting rod is rotatably installed on the mounting body, the sliding block is slidably installed on the mounting body, the sliding block is relatively fixed to the scraping member, and the scraping connecting rod is adapted to push the sliding block to slide when rotating to drive the scraping member to move.

[0023] The cleaning mechanism for 3D printing according to some embodiments of the present invention, the scraping connecting rod includes a pushing section and a following section, the rotating shaft of the scraping connecting rod is located at the connection of the pushing section and the following section, the free end of the pushing section is connected with the scraping driving member, the free end of the following section is connected with the sliding block, and the length from the free end of the pushing section to the rotating shaft is less than the length from the free end of the following section to the rotating shaft.

[0024] The cleaning mechanism for 3D printing according to some embodiments of the present invention, wherein the sliding block is provided with a pushing groove, the other end of the scraping link is provided with a pushing column, and the pushing column is slidably engaged with the pushing groove and is adapted to push the sliding block to move through the inner wall of the pushing groove.

[0025] The cleaning mechanism for 3D printing according to some embodiments of the present invention, wherein the scraping driving member is configured as a scraping rolling member, and the scraping rolling member is adapted to rollingly contact the tool head; and / or, the nozzle wiping driving structure and the scraping driving structure are distributed along the arrangement direction of at least two of the nozzles.

[0026] The cleaning mechanism for 3D printing according to some embodiments of the present invention, wherein both the scraping driving member and the nozzle wiping driving member are located at the same end of the mounting body in the Y direction, the tool head is arranged to move relative to the mounting body in the XY plane, and the tool head is adapted to sequentially trigger the scraping driving member and the nozzle wiping driving member during the movement in the X direction.

[0027] The cleaning mechanism for 3D printing according to some embodiments of the present invention, when the scraping driving member is not triggered, the scraping member is farther away from the hot bed than the nozzle wiping member; and, after the scraping driving member is triggered and drives the scraping member to scrape, the scraping member is offset from the nozzle in the X direction, and the nozzle and the nozzle wiping member are opposite to each other in the X direction.

[0028] The cleaning mechanism for 3D printing according to some embodiments of the present invention, there are two nozzle wiping driving structures, the scraping driving structure is located between the two nozzle wiping driving structures, and the nozzle wiping members of the two nozzle wiping driving structures are adapted to wipe the two nozzles respectively.

[0029] The cleaning mechanism for 3D printing according to some embodiments of the present invention, the nozzle wiping driving member is configured to move in a first direction to drive the nozzle wiping member to swing and perform position switching, and the nozzle is arranged to move in a second direction to wipe the nozzle through the nozzle wiping member, the first direction is perpendicular to the second direction; wherein, the swing angle corresponding to the nozzle wiping member switching from one wiping position to the other wiping position is between 3° and 12°.

[0030] The present invention also provides a 3D printing device.

[0031] The 3D printing device according to an embodiment of the present invention includes a printer and the cleaning mechanism for 3D printing according to any one of the above embodiments, the printer is movable relative to the mounting body, and the tool head of the printer is provided with a nozzle.

[0032] The advantages of the 3D printing device and the above-mentioned cleaning mechanism for 3D printing over the prior art are the same and will not be elaborated here.

[0033] The present invention also provides a cleaning method for 3D printing.

[0034] According to the cleaning method for 3D printing of an embodiment of the present invention, the cleaning method is applicable to a cleaning mechanism, the cleaning mechanism includes a scraping member, a nozzle wiping member, and two nozzles, and the heights of the two nozzles are different, and the cleaning method includes: controlling the tool head to move in a first direction so that the tool head drives the scraping member to scrape the waste material under the two nozzles; controlling the tool head to move in a second direction so that the nozzles pass through the nozzle wiping member for wiping, and the second direction intersects with the first direction.

[0035] The advantages of the cleaning method for 3D printing over the prior art are the same as those of the above-mentioned 3D printing device and the above-mentioned cleaning mechanism for 3D printing, and will not be elaborated here.

[0036] According to the cleaning method for 3D printing of some embodiments of the present invention, the controlling the tool head to move in the second direction includes: controlling the tool head to move to a position where the two nozzles are located on a first side of the nozzle wiping member, driving the tool head to move in the second direction towards the nozzle wiping member so that the nozzle wiping member switches from one wiping position to another wiping position and drives one of the nozzles close to the nozzle wiping member to pass through the nozzle wiping member; or, controlling the tool head to move to a position where the two nozzles are located on a first side of the nozzle wiping member, driving the nozzle wiping member to switch from one wiping position to another wiping position, driving the tool head to move in the second direction and driving one of the nozzles close to the nozzle wiping member to pass through the nozzle wiping member.

[0037] According to the cleaning method for 3D printing of some embodiments of the present invention, the nozzle wiping member has a first side and a second side opposite to each other in the second direction, the first side of the nozzle wiping member is adjacent to the scraping member, and the second side of the nozzle wiping member faces away from the scraping member.

[0038] According to the cleaning method for 3D printing of some embodiments of the present invention, the controlling the tool head to move in the second direction includes: controlling the tool head to move to a position where the two nozzles are located on a second side of the nozzle wiping member, the nozzle wiping member is in a wiping position, driving the tool head to move in the second direction towards the nozzle wiping member, and driving the other nozzle close to the nozzle wiping member to pass through the nozzle wiping member.

[0039] The method for cleaning 3D printing according to some embodiments of the present invention, the control of the tool head moving in the first direction includes: controlling the tool head to reciprocate in the first direction so that the scraping member scrapes the waste materials below the two nozzles; and / or, the control of the tool head moving in the second direction includes: controlling the tool head to reciprocate in the second direction so that the nozzle passes through the nozzle wiping member for repeated wiping.

[0040] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0042] Figure 1 is a schematic structural diagram of a 3D printing device according to an embodiment of the present invention Figure 1 ;

[0043] Figure 2 is a schematic structural diagram of a 3D printing device according to an embodiment of the present invention Figure 2 ;

[0044] Figure 3 is a schematic structural diagram of a 3D printing device according to an embodiment of the present invention Figure 3 ;

[0045] Figure 4 is a schematic structural diagram of a cleaning mechanism for 3D printing according to an embodiment of the present invention Figure 1 ;

[0046] Figure 5 is a schematic structural diagram of a cleaning mechanism for 3D printing according to an embodiment of the present invention Figure 2 ;

[0047] Figure 6 is a schematic structural diagram of a cleaning mechanism for 3D printing according to an embodiment of the present invention Figure 3 ;

[0048] Figure 7 is a cross-sectional view of a cleaning mechanism for 3D printing according to an embodiment of the present invention;

[0049] Figure 8 is Figure 7 a partial structural schematic diagram of;

[0050] Figure 9 is a schematic structural diagram of a scraping driving structure according to an embodiment of the present invention;

[0051] Figure 10It is a schematic structural diagram of a mouth-wiping driving structure according to an embodiment of the present invention;

[0052] Figure 11 It is a partial structural schematic diagram of a mouth-wiping driving structure according to an embodiment of the present invention;

[0053] Figure 12 It is a structural schematic of a mouth-wiping member according to an embodiment of the present invention Figure 1 ;

[0054] Figure 13 It is a structural schematic of a mouth-wiping member according to an embodiment of the present invention Figure 2 ;

[0055] Figure 14 It is a structural schematic of a mouth-wiping member according to an embodiment of the present invention Figure 3 ;

[0056] Figure 15 It is a structural schematic of a mouth-wiping member according to an embodiment of the present invention Figure 4 ;

[0057] Figure 16 It is a schematic structural diagram of a trigger part according to an embodiment of the present invention;

[0058] Figure 17 It is a schematic structural diagram when a scraping driving part is triggered according to an embodiment of the present invention;

[0059] Figure 18 It is a partial structural schematic diagram of a 3D-printed cleaning mechanism according to an embodiment of the present invention;

[0060] Figure 19 It is a partial cross-sectional view of a 3D-printed cleaning mechanism according to an embodiment of the present invention;

[0061] Figure 20 It is the logical flow of a 3D-printed cleaning method according to an embodiment of the present invention Figure 1 ;

[0062] Figure 21 It is the logical flow of a 3D-printed cleaning method according to an embodiment of the present invention Figure 2 ;

[0063] Figure 22 It is the logical flow of a 3D-printed cleaning method according to an embodiment of the present invention Figure 3 .

[0064] Reference numerals:

[0065] 3D printing device 100, cleaning mechanism 101, tool head 102, nozzle 1021, trigger part 1022, guiding inclined surface 1022a,

[0066] Installation body 1, waste receiving surface 11, waste receiving area 111, installation groove 12, blanking port 13

[0067] Mouth wiping drive structure 2, limit groove 21, mouth wiping drive member 3, mouth wiping member 4, limit protrusion 41, wiping groove 42, material groove 47

[0068] First elastic member 51, second elastic member 52

[0069] Scraping drive structure 6, scraping connecting rod 61, pushing section 611, follower section 612, pushing column 611, scraping avoidance space 612, sliding block 62, pushing groove 621

[0070] Scraping drive member 7, scraping member 8, scraping edge 81, first rotating shaft 91, second rotating shaft 92 Detailed implementation mode

[0071] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "right", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0073] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0074] The following reference Figures 1 - 19Describe the cleaning mechanism 101 of the 3D printer 100 according to an embodiment of the present invention. The cleaning mechanism 101 of the 3D printer 100 can effectively wipe and clean the nozzles 1021 at multiple different heights of the printer 102, ensuring the stability and durability of the printing quality.

[0075] As Figures 1 - 19 shown, the cleaning mechanism 101 of the 3D printer according to an embodiment of the present invention includes: a mounting body 1 and a nozzle wiping drive structure 2.

[0076] First of all, it should be noted that the cleaning mechanism 101 of the 3D printer of the present invention is mainly divided into two cleaning processes. The first cleaning process is to clean the waste material flushed by the nozzle 1021 for material change. The second cleaning process is to clean the nozzle 1021 to clean the waste material adhered to the surface of the nozzle 1021 to maintain the cleanliness of the nozzle 1021.

[0077] The mounting body 1 is the fixed foundation of the entire cleaning mechanism 101 of the 3D printer, which is used to install and support the nozzle wiping drive structure 2 and other structural components to ensure the stability and reliability of the entire cleaning mechanism 101. The mounting body 1 can be installed on the 3D printing device 100 through connection methods such as bolt connection, snap connection, and snap protrusion and slot to ensure its stable installation, so as to prevent the cleaning mechanism 101 from shifting, shaking, etc. during the cleaning process, affecting the accuracy and cleanliness of the cleaning.

[0078] The nozzle wiping drive structure 2 is the key moving component of the cleaning mechanism 101. The nozzle wiping drive structure 2 is movably installed on the mounting body 1, that is, the nozzle wiping drive structure 2 can move within a certain range relative to the mounting body 1 to ensure the mobility of the cleaning mechanism 101. For example, the nozzle wiping drive structure 2 can be connected to the mounting body 1 and move relative to it through connecting components such as a rotating shaft, a pin shaft, and a bearing. As Figure 6 shown, the nozzle wiping drive structure 2 is installed with a nozzle wiping drive member 3 and a nozzle wiping member 4. The nozzle wiping drive member 3 and the nozzle wiping member 4 are spaced apart to prevent interference between the two. The nozzle wiping drive member 3 is a component that drives the nozzle wiping drive structure 2 and can transmit power to the nozzle wiping drive structure 2 to drive the nozzle wiping drive structure 2 to move. The nozzle wiping member 4 is a component for wiping the nozzle 1021 of the tool head 102, and it can directly contact and wipe the nozzle 1021 of the tool head 102 to achieve the cleanliness of the nozzle 1021 of the tool head 102.

[0079] Further, the mouth wiping driving member 3 is adapted to drive the mouth wiping driving structure 2 to move relative to the mounting body 1, so as to drive the mouth wiping member 4 to switch from one wiping position to another wiping position. The mouth wiping member 4 is used to wipe the nozzle 1021 of the tool head 102 of the printer at the wiping position. One wiping position is at least different from the other wiping position in the height direction, that is, one wiping position is higher than the height of the other wiping position, or the other wiping position is higher than the height of one wiping position, so as to facilitate wiping the nozzles 1021 at different heights.

[0080] That is to say, in the initial state, the mouth wiping member 4 is located at one of the two wiping positions. At this time, one nozzle 1021 of the tool head 102 can be directly wiped for cleaning. When it is necessary to clean the other nozzle 1021, the tool head 102 of the printer can move relative to the cleaning mechanism 101, so that the other nozzle 1021 moves accordingly. When the other nozzle 1021 of the tool head 102 moves to a position opposite to the mouth wiping member 4, at this time, the tool head 102 can trigger the mouth wiping driving member 3 to push the mouth wiping driving member 3 to move relative to the mounting body 1. Then, when the mouth wiping driving member 3 moves, it can drive the mouth wiping driving structure 2 to move. When the mouth wiping driving structure 2 moves, it can drive the mouth wiping member 4 to move, and make the mouth wiping member 4 switch from one wiping position to another wiping position. At this time, the mouth wiping member 4 located at the other wiping position is in direct contact with the other nozzle 1021 of the tool head 102. As the tool head 102 of the printer continues to move, the waste on the other nozzle 1021 can be wiped and cleaned as a whole. After the wiping of the other nozzle 1021 is completed, the mouth wiping driving structure 2 can return to the initial position, that is, the initial one wiping position, under the action of gravity, elastic force, magnetic force or other reset structures, and the mouth wiping member 4 will also be reset to the initial wiping position accordingly.

[0081] It should be noted that in the multi-color printing of the dual nozzles 1021, two nozzles 1021 with different heights are provided on the tool head 102. The cleaning mechanism 101 of the present invention can wipe and clean the two nozzles 1021 with different heights. Of course, it can also wipe and clean more nozzles 1021 with different heights. Next, taking the two nozzles 1021 with different heights as an example for description.

[0082] Specifically, as Figure 1 shown, with reference to Figure 1 for explanation, the heights of the two nozzles 1021 are different. One nozzle 1021 has a higher height, and the other nozzle 1021 has a lower height. As shown in the front-back direction in Figure 1 , the nozzle 1021 is located in front of the tool head 102 of the printer. As shown in Figure 6As shown, the nozzle wiping member 4 is located in front of the mounting body 1. In the initial state, the nozzle wiping member 4 is at one of the wiping positions with a lower height. As the tool head 102 moves from left to right, the nozzle wiping driving member 3 can be triggered, so that the nozzle wiping member 4 can switch from a wiping position with a lower height to another wiping position with a higher height, and remains stable at the other wiping position, making the nozzle wiping member 4 contact the right nozzle 1021. As the tool head 102 continues to move to the right or reciprocates within the wiping stroke corresponding to the right nozzle 1021 and the nozzle wiping member 4, at this time, the nozzle wiping member 4 remains at the other wiping position to wipe the right nozzle 1021. After wiping the right nozzle 1021, as the tool head 102 continues to move to the right, the nozzle wiping driving member 3 can be staggered, so that the nozzle wiping member 4 can switch from the other wiping position to a wiping position, and remains stable or stays at this wiping position, making the nozzle wiping member 4 contact the left nozzle 1021. As the tool head 102 continues to move to the right or reciprocates within the wiping stroke corresponding to the left nozzle 1021 and the nozzle wiping member 4, the left nozzle 1021 is wiped. Thus, the wiping and cleaning of the nozzles 1021 at two different heights are completed.

[0083] Thus, by triggering the nozzle wiping driving member 3 at different positions by the tool head 102, the nozzle wiping driving member 3 can drive the nozzle wiping driving structure 2 to move relative to the mounting body 1. Furthermore, the nozzle wiping driving structure 2 can drive the nozzle wiping member 4 to switch from one wiping position to another wiping position, so as to change the height of the nozzle wiping member 4, and effectively wipe and clean the nozzles 1021 at different heights of the tool head 102 of the printer, ensuring the stability and durability of the printing quality.

[0084] In some embodiments, only one nozzle 1021 is wiped at a time. When the left nozzle 1021 is at a low position, that is, when the lifting nozzle 1021 is in the working position (low position), the lifting nozzle 1021 is wiped at this time. When the lifting nozzle 1021 is in the standby position (high position), the fixed nozzle 1021 in the working state, that is, the right nozzle 1021, is wiped at this time.

[0085] In some embodiments, the nozzles 1021 on the left and right sides can be swapped. That is, in the working state, the nozzle 1021 on the left side has a higher height, and the nozzle 1021 on the right side has a lower height. For example, the right nozzle is set as a liftable nozzle. Similarly, at this time, the nozzle wiping member 4 can also be synchronously arranged on the left side of the two nozzles or on the right side of the two nozzles.

[0086] The cleaning mechanism 101 for 3D printing according to an embodiment of the present invention installs a wiping nozzle driving member 3 and a wiping nozzle member 4 on the wiping nozzle driving structure 2. When the wiping nozzle driving member 3 is triggered, the wiping nozzle driving member 3 can drive the wiping nozzle driving structure 2 to move relative to the mounting body 1, so as to drive the wiping nozzle member 4 to switch from one wiping position to another wiping position, thereby changing the height of the wiping nozzle member 4, and effectively wiping and cleaning the nozzles 1021 at multiple different heights of the tool head 102 of the printer, ensuring the stability and durability of the printing quality.

[0087] In some embodiments, the wiping nozzle driving structure 2 is rotatably mounted on the mounting body 1, and the rotation axis of the wiping nozzle driving structure 2 is located between the wiping nozzle driving member 3 and the wiping nozzle member 4.

[0088] That is to say, the wiping nozzle driving structure 2 can rotate or swing on the mounting body 1 to realize the movement of the wiping nozzle driving structure 2, and the rotation axis of the wiping nozzle driving structure 2 is located between the wiping nozzle driving member 3 and the wiping nozzle member 4. The rotation axis is the rotation center line of the wiping nozzle driving structure 2, and the wiping nozzle driving structure 2 can rotate within a certain range around the rotation axis. By setting the rotation axis of the wiping nozzle driving structure 2 to be located between the wiping nozzle driving member 3 and the wiping nozzle member 4, the acting force of the wiping nozzle driving member 3 can be smoothly transmitted to the wiping nozzle member 4 through the rotation of the wiping nozzle driving structure 2, so as to realize the flexible switching of the wiping nozzle member 4 from one wiping position to another wiping position.

[0089] Specifically, the tool head 102 of the 3D printer has a certain thickness in the Y direction, that is, the front-back direction, and the nozzle 1021 can be arranged at the front or middle part of the tool head 102 in the Y direction. By reasonably setting the position of the wiping nozzle driving structure 2, the triggering can be realized by using the distance between the nozzle 1021 and the rear part of the tool head 102. In other words, when the tool head 102 moves to the position of the printer's chassis in the Y direction, there is still a certain distance between the nozzle 1021 and the frame of the chassis. By triggering the wiping nozzle driving member 3 with the rear side of the tool head 102, no additional space inside the chassis is occupied, thereby improving the space utilization efficiency, facilitating the expansion of the printing area under the same chassis size, and enhancing the printing efficiency.

[0090] In some embodiments, the wiping nozzle driving member 3 and the wiping nozzle member 4 are respectively arranged at both ends of the wiping nozzle driving structure 2, and the middle part of the wiping nozzle driving structure 2 is rotatably connected to the mounting body 1.

[0091] Specifically, as Figure 1 and Figure 6 shown, the inside of the mounting body 1 is hollow to form a mounting groove 12. The wiping nozzle driving structure 2 extends along the length of the mounting body 1 and is mounted in the mounting groove 12, as Figure 1As shown in the front-rear direction, the mouth wiping driving member 3 is arranged at the rear end of the mouth wiping driving structure 2 and can be triggered by the rear end of the tool head 102. The mouth wiping member 4 is arranged at the front end of the mouth wiping driving structure 2, which is convenient for wiping the nozzle 1021 at the front end of the tool head 102. Among them, the mouth wiping driving structure 2 is a bridge connecting the mouth wiping driving member 3 and the mouth wiping member 4. As Figure 6 shown, the middle part of the mouth wiping driving structure 2 is rotatably installed on the installation body 1 through the first rotating shaft 91. In this way, the overall rotation stability of the mouth wiping driving structure 2 can be ensured, which is beneficial to the mouth wiping driving structure 2 stably transmitting the movement of the mouth wiping driving member 3 to the mouth wiping member 4 to realize the movement of the mouth wiping member 4, facilitating the flexible switching of the mouth wiping member 4 from one wiping position to another, and enabling the mouth wiping driving member 3 and the mouth wiping member 4 to move in opposite directions, one can rise while the other can fall.

[0092] Specifically, as Figure 2 , Figure 6 and Figure 10 shown, when the mouth wiping driving member 3 is triggered by the rear end of the tool head 102 and the mouth wiping driving member 3 is pressed downward to drive the mouth wiping driving member 3, the middle part of the mouth wiping driving structure 2 will rotate around the first rotating shaft 91, causing the rear part of the mouth wiping driving structure 2 to move downward. At the same time, the front part of the mouth wiping driving structure 2 moves upward to drive the mouth wiping member 4 at the front end to move upward to a position with a higher height, that is, to switch from a wiping position with a lower height to another wiping position with a higher height to adapt to the height of the nozzle 1021 with a higher height, so as to realize the wiping and cleaning of the nozzle 1021 with a higher height.

[0093] Correspondingly, the mouth wiping driving member 3 can also move upward, causing the middle part of the mouth wiping driving structure 2 to rotate around the first rotating shaft 91, making the rear part of the mouth wiping driving structure 2 move upward. At the same time, the front part of the mouth wiping driving structure 2 moves downward to drive the mouth wiping member 4 at the front end to move downward to a position with a lower height, that is, to switch from another wiping position with a higher height to the previous wiping position with a lower height to adapt to the height of the nozzle 1021 with a lower height, and then realize the wiping and cleaning of the nozzle 1021 with a lower height.

[0094] Thus, by moving the mouth wiping member 4 at the front end of the mouth wiping driving structure 2 to different height positions to adapt to the heights of nozzles 1021 with different heights, the wiping and cleaning of nozzles 1021 with different heights can be realized.

[0095] In some other embodiments, the mouth wiping driving structure 2 is rotatably installed on the installation body 1, and both the mouth wiping driving member 3 and the mouth wiping member 4 are arranged on one side of the rotating shaft of the mouth wiping driving structure 2.

[0096] That is to say, the mouth wiping drive structure 2 can rotate or swing on the mounting body 1 to realize the movement of the mouth wiping drive structure 2, and both the mouth wiping drive member 3 and the mouth wiping member 4 are arranged on one side of the rotating shaft of the mouth wiping drive structure 2. In this way, the overall size and complexity of the cleaning mechanism 101 can be reduced, the structural compactness of the cleaning mechanism 101 is improved, and it is beneficial to realize the miniaturization of the cleaning mechanism 101. Specifically, when the mouth wiping drive member 3 is triggered, the mouth wiping drive structure 2 can rotate within a certain range around the rotating shaft to drive the mouth wiping member 4 to move, so as to realize the flexible switching of the mouth wiping member 4 from one wiping position to another wiping position, and make the mouth wiping drive member 3 and the mouth wiping member 4 move in the same direction, that is, they can rise or fall simultaneously.

[0097] In another embodiment, the mouth wiping drive structure 2 is slidably connected to the mounting body 1, the mouth wiping drive member 3 drives the mouth wiping member 4 to switch from one wiping position to another wiping position, and the mouth wiping member 4 is adapted to switch from another wiping position to one wiping position under the action of gravity, magnetic force and / or elastic force.

[0098] That is to say, the mouth wiping drive structure 2 can slide or move along a certain direction on the mounting body 1. When the mouth wiping drive member 3 is triggered, the mouth wiping drive member 3 drives the mouth wiping drive structure 2 to slide on the mounting body 1 to drive the mouth wiping member 4 to switch from one wiping position to another wiping position, so as to wipe the nozzle 1021 to be cleaned at another wiping position. After wiping the nozzle 1021, the mouth wiping member 4 can switch from another wiping position to one wiping position under the action of gravity, magnetic force or elastic force, so that the mouth wiping member 4 returns to the initial position. At this wiping position, the nozzle 1021 with a different height can also be wiped. Thus, the automatic and flexible switching of the mouth wiping member 4 between one wiping position and another wiping position is realized, without manual reset, which improves the convenience.

[0099] Among them, the magnetic force can be generated by other magnetic structural components such as electromagnets and magnets, and the elastic force can be generated by other elastic structural components such as springs and elastic sheets.

[0100] In some embodiments, the mouth wiping member 4 is detachably mounted on the mouth wiping drive structure 2.

[0101] That is to say, the mouth wiping member 4 can be mounted on the mouth wiping drive structure 2 through connection methods such as threaded connection, snap connection, plug connection, and convex connection. In this way, the mouth wiping member 4 can be easily and conveniently mounted on the mouth wiping drive structure 2, and can also be easily and conveniently detached from the mouth wiping drive structure 2, so as to facilitate the replacement, cleaning or repair of the mouth wiping member 4, which is flexible and convenient.

[0102] In some other embodiments, another wiping position is higher than a wiping position in the height direction, that is, the height of the other wiping position is higher than the height of the one wiping position.

[0103] Thus, when the initial mouth wiping member 4 is located at a wiping position, the nozzle 1021 with a lower height can be wiped. After completing the cleaning wipe of the nozzle 1021 with a lower height, the mouth wiping member 4 can be switched to another wiping position to wipe the nozzle 1021 with a higher height.

[0104] In some embodiments, one of the mouth wiping member 4 and the mouth wiping driving structure 2 is provided with a limiting protrusion 41 and the other is provided with a limiting groove 21, and the insertion direction of the limiting protrusion 41 and the limiting groove 21 intersects with the wiping direction of the nozzle 1021.

[0105] That is to say, the limiting protrusion 41 can be provided on the mouth wiping member 4 and the limiting groove 21 can be provided on the mouth wiping driving structure 2, or the limiting groove 21 can be provided on the mouth wiping member 4 and the limiting protrusion 41 can be provided on the mouth wiping driving structure 2, and the shapes and sizes of the limiting protrusion 41 and the limiting groove 21 are matched so that the limiting protrusion 41 can be smoothly inserted into the limiting groove 21 to realize the plug-in connection between the mouth wiping member 4 and the mouth wiping driving structure 2, which is flexible, convenient and highly reliable, and can make the installation of the mouth wiping driving structure 2 and the mouth wiping member 4 firm. Among them, the insertion direction of the limiting protrusion 41 and the limiting groove 21 and the wiping direction of the nozzle 1021 can intersect perpendicularly or non-perpendicularly. The insertion direction of the limiting protrusion 41 and the limiting groove 21 can be the front-back direction, the up-down direction or other directions of the cleaning mechanism 101, and the wiping direction of the nozzle 1021 can be the left-right direction, the front-back direction or other directions of the cleaning mechanism 101, as long as the insertion direction and the wiping direction intersect at a certain angle. In this way, it can be ensured that when the mouth wiping member 4 wipes the nozzle 1021, the mouth wiping member 4 is restricted in the wiping direction to prevent the mouth wiping member 4 from accidentally falling off during the wiping process. In other words, even under the action of an external force, the mouth wiping member 4 can be stably installed on the mouth wiping driving structure 2 under the constraint of the limiting protrusion and the limiting groove to ensure the smooth progress of the wiping process.

[0106] Specifically, as Figures 11 - 14 shown, the overall structure of the mouth wiping member 4 is a rectangular block. The limiting protrusion 41 is provided on the mouth wiping member 4 and protrudes backward, and the limiting groove 21 is provided on the mouth wiping driving structure 2 and opens upward. The limiting protrusion 41 can be inserted into the limiting groove 21 from top to bottom to realize the plug-in connection between the mouth wiping member 4 and the mouth wiping driving structure 2.

[0107] In some embodiments, as Figure 12 shown, the mouth wiping member 4 is formed with a wiping groove 42, and the wiping groove 42 extends along the length direction of the mouth wiping member 4 and also along Figure 1extends in the left - right direction as shown, the nozzle 1021 of the tool head 102 is adapted to pass through the wiping member 4 at the wiping groove 42, that is to say, the shape and size of the wiping groove 42 match those of the wiping member 4 so that the nozzle 1021 can be accommodated in the wiping groove 42. In this way, when the tool head 102 moves from left to right, the nozzle 1021 can be in pressing contact with the inner peripheral wall of the wiping groove 42. As the nozzle 1021 continues to move, the nozzle 1021 generates slight friction or contact with the wiping member 4 during the movement, thereby playing a role in wiping and cleaning the nozzle 1021.

[0108] In some embodiments, as shown in FIGS. 12 and Figure 14 shown, the wiping member 4 is further provided with a material groove 47 penetrating in the up - down direction. During the process of the nozzle 1021 passing through the wiping groove 42 to wipe the nozzle 1021, the wiped waste can fall downward through the material groove 47. Figures 12 - 14 Taking the example that three material grooves 47 are provided, of course, other quantities can also be set. Setting multiple material grooves 47 can improve the wiping effect and effectively prevent waste from accumulating in the wiping groove 42 to block the wiping groove 42 and hinder the movement of the nozzle 1021.

[0109] Furthermore, the tool head 102 is provided with a trigger portion 1022, and there are two nozzles 1021 on the tool head 102, and the two nozzles 1021 are adapted to enter the wiping groove 42 in sequence.

[0110] Specifically, as Figure 2 、 Figure 16 and Figure 17 shown, the trigger portion 1022 is provided at the rear side of the tool head 102. As Figure 1 shown, there are two nozzles 1021 on the tool head 102, and the two nozzles 1021 are distributed in the left - right direction. In the working state, the nozzle 1021 on the right side is at a higher height, and the nozzle 1021 on the left side is at a lower height. The tool head 102 moves from left to right. The nozzle 1021 on the right side first contacts the wiping groove 42. At this time, the height of the wiping member 4 rises to match the higher nozzle 1021, and as the tool head 102 continues to move, it enters the wiping groove 42 and repeatedly wipes along the extending direction of the wiping groove 42 until the nozzle 1021 on the right side finishes wiping and leaves the wiping member 4 and exits from the wiping groove 42. Then, as the tool head 102 continues to move, at this time, the height of the wiping member 4 drops to match the lower nozzle 1021, and the nozzle 1021 on the left side can enter the wiping groove 42 and repeatedly wipe along the extending direction of the wiping groove 42 until the nozzle 1021 on the left side finishes wiping and leaves the wiping member 4 and exits from the wiping groove 42, thus completing the sequential wiping of the two nozzles 1021.

[0111] Further, the triggering part 1022 is arranged to trigger the nozzle wiping driving part 3 during at least part of the stroke of one of the two nozzles 1021 corresponding to the wiping groove 42, so that the height position of the wiping groove 42 corresponds to the height position of one of the nozzles 1021. That is to say, when starting to wipe one of the nozzles 1021, the triggering part 1022 will trigger the nozzle wiping driving part 3, so that the height position of the nozzle wiping part 4 changes, and thus the height position of the wiping groove 42 corresponds to the height position of this nozzle 1021. Therefore, during at least part of the stroke of this nozzle 1021 corresponding to the wiping groove 42, it can reciprocate to realize the wiping of this nozzle 1021. After the wiping of this nozzle 1021 is completed, when it is necessary to wipe the other nozzle 1021, at this time, the triggering part 1022 can stop triggering the nozzle wiping driving part 3 or the triggering part 1022 triggers to change the height position of the nozzle wiping part 4, so that the height position of the wiping groove 42 corresponds to the height position of the other nozzle 1021. Therefore, during at least part of the stroke of the other nozzle 1021 corresponding to the wiping groove 42, it can reciprocate to realize the wiping of this nozzle 1021.

[0112] Thus, by means of the triggering part 1022, the nozzle wiping driving part 3 is triggered during at least part of the stroke of the two nozzles 1021 entering the wiping groove 42, so as to realize the change of the height position of the wiping groove 42, and further realize the wiping of the nozzles 1021 with different heights.

[0113] Specifically, as Figures 1 - 3 shown, after the waste materials flushed from the two nozzles 1021 are cleaned up, the tool head 102 continues to move from left to right, and the triggering part 1022 will contact the nozzle wiping driving part 3 to trigger the nozzle wiping driving part 3. The nozzle wiping driving part 3 then drives the nozzle wiping driving structure 2 to move. The movement of the nozzle wiping driving structure 2 drives the nozzle wiping part 4 to move, causing the nozzle wiping part 4 to lift upward, switching from a wiping position with a lower position to another wiping position with a higher position, so that the height position of the wiping groove 42 rises to adapt to the higher nozzle 1021 on the right. At the same time, the triggering part 1022 keeps pressing against and contacting the nozzle wiping driving part 3. And at the same time, the higher nozzle 1021 on the right enters the wiping groove 42 and is wiped as the tool head 102 reciprocates until the wiping of the nozzle 1021 on the right is just completed, that is, the nozzle 1021 on the right just leaves the wiping groove 42, and the triggering part 1022 leaves the nozzle wiping driving part 3. At this time, the nozzle wiping driving part 3 is no longer triggered by the triggering part 1022, and the nozzle wiping part 4 will switch from another wiping position with a higher position to a wiping position with a lower position again, so that the height position of the wiping groove 42 decreases to adapt to the higher nozzle 1021 on the left. Then, as the tool head 102 continues to move to the right, the lower nozzle 1021 on the left enters the wiping groove 42 and is wiped as the tool head 102 reciprocates.

[0114] In some embodiments, the nozzle 1021 on the left side and the nozzle 1021 on the right side can be swapped. That is, in the working state, the nozzle 1021 on the left side has a higher height, and the nozzle 1021 on the right side has a lower height. For example, the right nozzle 1021 is set as a liftable nozzle 1021. Similarly, at this time, the wiping member 4 can also be synchronously arranged on the left side of the two nozzles 1021 or on the right side of the two nozzles 1021.

[0115] In some embodiments, one of the two nozzles 1021 is configured as a liftable nozzle 1021 and the other is configured as a fixed nozzle 1021. Specifically, as Figure 1 shown, the nozzle 1021 located on the left side of the tool head 102 is configured as a liftable nozzle 1021, and the nozzle 1021 located on the right side of the tool head 102 is configured as a fixed nozzle 1021. The liftable nozzle 1021 can be lifted to change its height position. When it needs to be wiped, the liftable nozzle 1021 can be lowered, while the height of the fixed nozzle 1021 remains unchanged. The fixed nozzle 1021 can also be replaced, but its position height is fixed and unchanged, and the lowest position where the liftable nozzle 1021 descends is lower than the height of the fixed nozzle 1021.

[0116] As Figure 10 shown, the rotating shaft of the wiping driving structure 2 is the first rotating shaft 91. The first rotating shaft 91 is located between the wiping member 4 and the wiping driving member 3. In this way, the wiping member 4 can move up and down along with the rotation of the first rotating shaft 91 to change its height, so that the wiping member 4 can be raised or lowered. The height of the wiping member 4 in the initial state corresponds to the lowest position or the working position of the liftable nozzle 1021. The triggering portion 1022 is used to drive the wiping member 4 to rise. That is to say, the height position of the wiping member 4 in the initial state is the position for wiping the liftable nozzle 1021 that has descended to the lowest position, and it is also the working position of the liftable nozzle 1021. The triggering portion 1022 can first be used to drive the wiping member 4 to rise to wipe the fixed nozzle 1021, and then the triggering portion 1022 leaves the driving wiping member 3, and the wiping member 4 returns to the initial state to wipe the liftable nozzle 1021. Of course, it is also possible to first wipe the liftable nozzle 1021 and then drive the wiping member 4 to rise through the triggering portion 1022 to wipe the fixed nozzle 1021.

[0117] Alternatively, the rotating shaft of the nozzle wiping drive structure 2 is located on one side of the nozzle wiping drive member 3 and the nozzle wiping member 4. The triggering portion 1022 is used to drive the nozzle wiping member 3 to lower, and the initial state of the nozzle wiping member 4 corresponds to the position of the fixed nozzle 1021. That is to say, the nozzle wiping drive member 3 and the nozzle wiping member 4 are simultaneously raised or lowered under the drive of the first rotating shaft 91. The height position of the nozzle wiping member 4 in the initial state is the position for wiping the fixed nozzle 1021, and the fixed nozzle 1021 can be wiped. After the wiping of the fixed nozzle 1021 is completed, the triggering portion 1022 of the tool head 102 can trigger the drive of the nozzle wiping member 3, so that the height position of the drive nozzle wiping member 3 is lowered, thereby causing the nozzle wiping drive structure 2 to drive the nozzle wiping member 4 to move so that the height position of the nozzle wiping member 4 is lowered. At this time, the lifting nozzle 1021 can be wiped.

[0118] In some embodiments, one of the two nozzles 1021 is configured as a lifting nozzle 1021 and the other is configured as a fixed nozzle 1021. As Figure 1 shown, the nozzle 1021 located on the left side of the tool head 102 is configured as a lifting nozzle 1021, and the nozzle 1021 located on the right side of the tool head 102 is configured as a fixed nozzle 1021. The lifting nozzle 1021 can be lifted or lowered to change its height position. When it needs to be wiped, the lifting nozzle 1021 can be lowered, while the height of the fixed nozzle 1021 remains unchanged, and the lowest position where the lifting nozzle 1021 is lowered is lower than the height of the fixed nozzle 1021.

[0119] When the nozzle wiping member 4 is directly opposite to the lifting nozzle 1021 in the wiping direction, the triggering portion 1022 is used to drive the nozzle wiping member 4 to lower or the nozzle wiping member 4 is in the lowest position.

[0120] That is to say, when the lifting nozzle 1021 moves along the wiping direction to be directly opposite to the nozzle wiping member 4, that is, when the lifting nozzle 1021 is about to enter the wiping groove 42, the triggering portion 1022 starts to trigger the nozzle wiping drive member 3 to lower the nozzle wiping member 4, and lower it to the lowest position. This position corresponds to the height position of the lifting nozzle 1021 and is the position for wiping the lifting nozzle 1021.

[0121] In other embodiments, when the nozzle wiping member 4 is directly opposite to the fixed nozzle 1021 in the wiping direction, the triggering portion 1022 is used to drive the nozzle wiping member 4 to rise or the nozzle wiping member 4 is in the highest position.

[0122] That is to say, when the fixed nozzle 1021 moves along the wiping direction to be directly opposite to the nozzle wiping member 4, that is, when the fixed nozzle 1021 is about to enter the wiping groove 42, the triggering portion 1022 starts to trigger the nozzle wiping drive member 3 to raise the nozzle wiping member 4, and raise it to the highest position. This position corresponds to the height position of the fixed nozzle 1021 and is the position for wiping the fixed nozzle 1021.

[0123] In some embodiments, the wiping member 4 is located on one side of the fixed nozzle 1021, and the triggering portion 1022 is disposed centrally relative to the tool head 102.

[0124] As Figure 1 shown, the wiping member 4 is located on the right side, and the fixed nozzle 1021 is also located on the right side, that is, the wiping member 4 is located on one side of the fixed nozzle 1021, that is, the triggering portion 1022 is disposed at the middle position on the rear side of the tool head 102, that is, the triggering portion 1022 is disposed centrally relative to the tool head 102. Thus, during the movement of the tool head from left to right, when the fixed nozzle 1021 moves to the left side position of the wiping member 4 and the wiping of the fixed nozzle 1021 has not started, the triggering portion 1022 is not triggered, and the wiping member is at a wiping position with a relatively low height in the initial state. As the tool head 102 continues to move to the right, the triggering portion 1022 is triggered, and the height of the wiping member 4 increases. Subsequently, the wiping member 4 with a relatively low height starts to contact the fixed nozzle 1021. During this process, the tool head 102 also starts to reciprocate in the left and right directions to achieve repeated wiping of the fixed nozzle 1021. After the wiping of the fixed nozzle 1021 is completed, the tool head 102 can continue to move to the right. At this time, the triggering portion 1022 in the middle is disengaged from the tool head 1021 so that the height of the wiping member 4 decreases or returns to the initial state, thereby enabling the wiping of the lifting nozzle 1021 on the left side.

[0125] Thus, through the centrally disposed triggering portion 1022, the movement of the tool head 102 can just trigger the triggering portion 1022 to achieve the wiping of the fixed nozzle 1021 with a relatively high working position. After the wiping of the fixed nozzle 1021 is completed, the tool head 102 is disengaged from the triggering portion 1022, and then the wiping of the lifting nozzle 1021 is achieved.

[0126] Further, in the projection along the first direction, the center of the triggering portion 1022 is located in the middle between the centers of the two nozzles 1021, and the distance between the center of the triggering portion 1022 and the center of the nozzle 1021 is between 2 and 15 mm.

[0127] Specifically, as Figure 1 shown, the first direction is the front - rear direction shown in Figure 1 . In the projection along the front - rear direction, the center of the triggering portion 1022 is located in the middle between the centers of the two nozzles 1021. In this way, the size of the cleaning mechanism 101 in the left - right direction can be effectively reduced, and the occupied space of the cleaning mechanism 101 can be effectively saved.

[0128] Among them, in the design of the double nozzles 1021, the fixed nozzle 1021 is used more frequently, that is, the frequency of the fixed nozzle 1021 moving from the scraping driving structure 6 to the nozzle wiping driving structure 2 is also higher. By positioning the center of the triggering part 1022 in the middle between the centers of the two nozzles 1021, the wiping efficiency of the fixed nozzle 1021 can be improved, and the nozzle wiping driving member 3 and the scraping driving member 7 can be brought closer together, saving space.

[0129] The distance between the center of the triggering part 1022 and the center of the nozzle 1021 is between 2 - 15 mm. That is, the distance between the center of the triggering part 1022 and the center of the right fixed nozzle 1021 can be set to 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or other distances within this range, and the distance between the center of the triggering part 1022 and the center of the left lifting nozzle 1021 can also be set to 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm or other distances within this range. Thus, by setting the distance between the center of the triggering part 1022 and the center of the nozzle 1021 between 2 - 15 mm, the effect of increasing the wiping efficiency of the fixed nozzle 1021 can be achieved, and the nozzle wiping driving member 3 and the scraping driving member 7 can be brought closer together, achieving the effect of saving space to the greatest extent.

[0130] In some other embodiments, in the projection along the first direction, the ratio of the distance D1 between the central projection of the triggering part 1022 and the wiping member 4 to the distance D2 between the centers of the two nozzles 1021 is between 0.4 - 0.6.

[0131] Specifically, as Figure 1 shown, the first direction is the Figure 1 front - back direction shown in. In the projection along the front - back direction, the ratio of the distance D1 (not marked in the figure) between the central projection of the triggering part 1022 and the wiping member 4 to the distance D2 between the centers of the two nozzles 1021 is between 0.4 - 0.6, that is, the ratio between D1 and D2 can be 0.4, 0.45, 0.5, 0.55, 0.6 or other ratios within this range. In this way, the distance between the fixed nozzle 1021 and the lifting nozzle 1021 can be made most appropriate, which can ensure effective wiping of the fixed nozzle 1021 while avoiding contact between the lifting nozzle 1021 and the wiping member 4. At the same time, while effectively wiping the lifting nozzle 1021, contact between the fixed nozzle 1021 and the wiping member 4 can be avoided.

[0132] In some embodiments, the triggering part 1022 is configured as a triggering protrusion, and the triggering protrusion has a guiding inclined surface 1022a, and the guiding inclined surface 1022a is adapted to push the nozzle wiping driving member 3.

[0133] Specifically, as shown in Figure 2 , Figure 16 and Figure 17 , the triggering part 1022 is configured as a triggering protrusion, and the triggering protrusion protrudes backward and downward on the tool head 102. As shown in Figure 16 , the triggering protrusion has a guiding inclined surface 1022a. The guiding inclined surface 1022a is located on the left and right sides of the triggering protrusion and extends obliquely toward the left and right sides. As the tool head 102 moves from left to right, the guiding inclined surface 1022a on the right side will first contact the nozzle wiping driving part 3 to push the nozzle wiping driving part 3, thereby driving the nozzle wiping part 4 to move, so that the height position of the wiping groove 42 corresponds to the height position of the nozzle 1021, thereby realizing the wiping of the nozzle 1021.

[0134] And as the tool head 102 continues to move, the triggering protrusion continuously presses against the nozzle wiping driving part 3, so that the nozzle wiping part 4 remains at a certain height position unchanged. At this time, the nozzle 1021 also moves into the wiping groove 42 with the tool head 102 for repeated wiping until the triggering protrusion no longer presses against the nozzle wiping driving part 3, completing the wiping of the nozzle 1021. It can be guided and avoided through the guiding inclined surface 1022a on the left side to leave the triggering protrusion.

[0135] In some embodiments, the nozzle wiping driving part 3 is configured as an active part, and the nozzle wiping driving part 3 is used to actively drive the nozzle wiping driving structure 2 to drive the nozzle wiping part 4 to move.

[0136] That is to say, the nozzle wiping driving part 3 is an active driving component. The nozzle wiping driving part 3 actively drives the nozzle wiping driving structure 2 to transmit power to the nozzle wiping driving structure 2, and then the nozzle wiping driving structure 2 drives the nozzle wiping part 4 to move. Thus, through precise active control of the nozzle wiping driving part 3, it can be ensured that the nozzle wiping part 4 can move according to the set program to realize a quick switch from one wiping position to another wiping position and change the height position.

[0137] In some embodiments, the cleaning mechanism 101 of the 3D printer 100 further includes a first elastic member 51. The first elastic member 51 is connected between the nozzle wiping driving structure 2 and the mounting body 1, and the first elastic member 51 is used to apply an elastic force to the nozzle wiping driving structure 2 to switch the nozzle wiping part 4 from one wiping position to another wiping position.

[0138] Specifically, the first elastic member 51 has a certain elastic force and can undergo a certain degree of elastic deformation to provide an elastic force for the nozzle wiping driving structure 2. As shown in Figure 7 and Figure 10As shown, the first elastic member 51 extends in the vertical direction. Its upper end is in pressing connection with the nozzle wiping drive structure 2, and its lower end is in pressing connection with the mounting body 1. Thus, the first elastic member 51 is connected between the nozzle wiping drive structure 2 and the mounting body 1 to Figure 1 Taking the wiping of the right nozzle 1021 with a higher height shown in Figure 1 as an example, when the right nozzle 1021 of the tool head 102 moves to the right, it will first trigger the nozzle wiping driving member 3 and press the nozzle wiping driving member 3 downward, so that the rear part of the nozzle wiping drive structure 2 moves downward. At this time, the rear part of the nozzle wiping drive structure 2 will compress or stretch the first elastic member 51. At the same time, the front part of the nozzle wiping drive structure 2 moves upward, that is, the nozzle wiping member 4 moves upward, and the height of the nozzle wiping member 4 rises relative to the initial state, thus realizing the switching of the nozzle wiping member 4 from one wiping position to another wiping position. During the continuous movement of the nozzle 1021, the nozzle 1021 can be wiped. When the nozzle 1021 leaves the nozzle wiping member 4, that is, after the wiping of the nozzle 1021 is completed, the nozzle wiping driving member 3 no longer receives the downward acting force from the tool head 102. At this time, the rear part of the nozzle wiping drive structure 2 will move upward under the elastic force of the first elastic member 51 to restore to the initial state, so that the nozzle wiping driving member 3 returns to the height of the initial position. At the same time, the front part of the nozzle wiping drive structure 2 moves downward, that is, the nozzle wiping member 4 moves downward, and the height of the nozzle wiping member 4 decreases and returns to the height of the initial position, thus realizing the switching of the nozzle wiping member 4 from another wiping position to the previous wiping position. Then, the left nozzle 1021 can be continuously wiped.

[0139] Therefore, through the elastic force provided by the first elastic member 51, the nozzle wiping member 4 can be flexibly switched between one wiping position and another wiping position, ensuring the accuracy and timeliness of the cleaning action.

[0140] In some embodiments, the first elastic member 51 can be configured as a spring.

[0141] In some embodiments, as Figure 1 shown, when the left lifting nozzle 1021 works, its height is relatively low. When it is necessary to wipe the lifting nozzle 1021, the tool head 102 can move horizontally to bypass the right side of the nozzle wiping member 4, and then the tool head 102 reciprocates in the left-right direction to wipe the lifting nozzle 1021.

[0142] In some embodiments, as Figure 6 and Figure 9 shown, the cleaning mechanism 101 of the 3D printer 100 further includes a scraping drive structure 6. The scraping drive structure 6 is movably installed on the mounting body 1, that is, the scraping drive structure 6 can move within a certain range relative to the mounting body 1, ensuring the movability of the scraping drive structure 6. Among them, as Figure 9As shown, a scraping driving structure 6 is installed with a scraping driving member 7 and a scraping member 8. During the movement of the tool head 102, the scraping driving member 7 can be triggered and pushed, so that the scraping driving member 7 can move. The main function of the scraping member 8 is to scrape the flushed waste. After switching the printing consumables, it is necessary to flush the residual consumables in the nozzle 1021, and the waste generated by the nozzle 1021 during the flushing process.

[0143] Further, the scraping driving member 7 is adapted to drive the scraping member 8 to move relative to the mounting body 1, so as to drive the scraping member 8 to move from one scraping position to another scraping position.

[0144] That is to say, as Figures 1 - 3 shown, the tool head 102 can initially move relative to the cleaning mechanism 101 from front to back or from left to right. When it moves to a stable position, the nozzle 1021 is located above the scraping member 8 and the scraping member 8 is located at a scraping position. At this time, the nozzle 1021 can eject waste. Among them, during the movement of the tool head 102 in the front-back or left-right direction, the scraping driving member 7 will be gradually triggered and pushed, so that the scraping driving member 7 moves backward. When the scraping driving member 7 moves, it will drive the scraping driving structure 6 to move, so that the scraping driving structure 6 moves forward relative to the mounting body 1. And when the scraping driving structure 6 moves forward, it can drive the scraping member 8 to move forward. When the scraping member 8 moves to a scraping position, it is located in front of the nozzle 1021, and the scraping driving structure 6 stops moving stably. At this time, the scraping driving member 6 is located at a scraping position, and the nozzle 1021 starts to eject and flush the waste. After that, the tool head 102 will continue to move forward or left and right. After the tool head 102 leaves the scraping driving member 7, the scraping driving member 7 will move forward to restore the state of extending obliquely in the initial direction. At this time, during the forward movement of the scraping driving member 7, it will drive the scraping driving structure 6 to move backward relative to the mounting body 1, so that the scraping driving structure 6 drives the scraping member 8 to move backward, so as to move from one scraping position to another scraping position, and during this process, the ejected waste is scraped off.

[0145] Thus, through the triggering and pushing of the scraping driving member 7 by the tool head 102, the scraping driving member 7 can drive the scraping driving structure 6 to move relative to the mounting body 1 in the front-back direction. Furthermore, the scraping driving structure 6 can drive the scraping member 8 to move in the front-back direction, so that the scraping member 8 can be flexibly switched between two scraping positions, thereby scraping off the waste and realizing the cleaning of the waste ejected from the nozzle 1021.

[0146] As Figure 1 and Figure 9 shown, the scraping member 8 includes two scraping edges 81, and one of the two scraping edges 81 is higher than the other, that is, the two scraping edges 81 are at least different in the height direction. Figure 1The scraping edge 81 on the right side shown in the figure is higher than the scraping edge 81 on the left side. The scraping edge 81 on the right side is used to scrape off the waste material ejected by the nozzle 1021 with a higher height on the left side, and the scraping edge 81 on the left side is used to scrape off the waste material ejected by the nozzle 1021 with a lower height on the left side.

[0147] Thus, the scraping edge 81 can adapt to nozzles 1021 of different heights to scrape off the waste material ejected by the nozzles 1021 with different heights.

[0148] In some embodiments, the scraping member 8 includes two scraping edges 81, and one of the two scraping edges 81 is higher than the other scraping edge 81. As Figure 9 shown, the scraping member 8 includes two scraping edges 81, and the two scraping edges 81 are arranged side by side, and the height of the scraping edge 81 on the right side is higher than the height of the scraping edge 81 on the left side.

[0149] Further, the tool head 102 is provided with two nozzles 1021. One of the two nozzles 1021 is configured as a lifting nozzle 1021 and the other is configured as a fixed nozzle 1021. The lifting nozzle 1021 is in a working state when it is in the lower limit position, and the lifting nozzle is lower than the fixed nozzle 1021 when it is in the lower limit position. That is to say, the height of the fixed nozzle 1021 remains unchanged, and the lifting nozzle 1021 can be lifted and lowered to change its height position. When it is necessary to eject waste material, the lifting nozzle 1021 can be lowered to be in the lower limit position and in a working state. At this time, waste material can be ejected, and the height of the lifting nozzle 1021 when it is in the working state is lower than the height of the fixed nozzle 1021. One of the scraping edges 81 with a higher height is used to scrape off the waste material ejected by the fixed nozzle 1021, and the other scraping edge 81 with a lower height is used to scrape off the waste material ejected by the lifting nozzle 1021.

[0150] Specifically, as Figure 1 shown, the nozzle 1021 located on the left side of the tool head 102 is configured as a lifting nozzle 1021, and the nozzle 1021 located on the right side of the tool head 102 is configured as a fixed nozzle 1021. The scraping edge 81 on the right side is used to scrape off the waste material ejected by the fixed nozzle 1021, and the scraping edge 81 on the left side is used to scrape off the waste material ejected by the lifting nozzle 1021.

[0151] In some embodiments, as Figure 6 shown, the mounting body 1 is provided with a waste material receiving surface 11, and the waste material receiving surface 11 is used to receive the waste material ejected by the nozzle 1021. During the process of the scraping member 8 moving from one scraping position to another scraping position, the waste material on the waste material receiving surface 11 can be scraped off.

[0152] The waste receiving surface 11 includes two waste receiving areas 111, one of the two waste receiving areas 111 is higher than the other, that is, the heights of the two waste receiving areas 111 are different. In this way, it can adapt to two nozzles 1021 with different heights, so that the waste ejected from the two nozzles 1021 with different heights can respectively fall on the waste receiving surfaces 11 with different heights.

[0153] Specifically, as Figure 1 and Figure 6 shown, the waste receiving surface 11 includes two waste receiving areas 111, the two waste receiving areas 111 are distributed in the left-right direction and have different heights. The waste receiving area 111 on the right is higher, and the waste receiving area 111 on the left is lower. In this way, the nozzle 1021 with a higher height on the right side of the tool head 102 can be correspondingly located above the waste receiving area 111 on the right, so that the ejected waste can fall on the waste receiving area 111 on the right. The nozzle 1021 with a lower height on the left side of the tool head 102 can be correspondingly located above the waste receiving area 111 on the left, so that the ejected waste can fall on the waste receiving area 111 on the left, thereby effectively preventing the waste ejected due to the different heights of the nozzles 1021 from splashing out.

[0154] And the two scraping edges 81 are adapted to scrape the two waste receiving areas 111 one by one, that is, each scraping edge 81 corresponds to each waste receiving area 111 one by one, so that the waste of the two nozzles 1021 can be scraped off by the corresponding scraping edges 81.

[0155] Specifically, as Figure 6 shown, the scraping member 8 is integrally constructed in a U shape and connected to the scraping driving structure 6. The U-shaped structure can improve the overall structural strength of the scraping member 8 and save the occupied space of the scraping driving member 7. Figure 6 As shown in, the waste receiving surface 11 includes two waste receiving areas 111. The bottom of the scraping member 8 is provided with scraping edges 81 with different heights to respectively adapt to two nozzles 1021 with different heights. The scraping edge 81 on the right is higher, and the scraping edge 81 on the left is lower, so as to be correspondingly distributed with the two waste receiving areas 111 one by one, so that the waste on the two waste receiving areas 111 can be completely scraped off, so that the scraping member 8 can better scrape off the waste ejected from the nozzle 1021.

[0156] In some embodiments, the nozzle 1021 on the left side and the nozzle 1021 on the right side can be swapped. That is, in the working state, the nozzle 1021 on the left side has a higher height, and the nozzle 1021 on the right side has a lower height. For example, the right nozzle 1021 is set as a liftable nozzle 1021. Similarly, at this time, the scraping edge 81 and the waste receiving area 111 can also be synchronously set to be higher on the left side and lower on the right side to adapt to the heights of the two nozzles 1021. In some other embodiments, in the projection along the moving direction of the scraping member 8, the scraping driving member 7 is located between the two scraping edges 81.

[0157] Specifically, as Figure 1 and Figure 4 shown, the moving direction of the scraping member 8 is the Figure 1 front-back direction shown in, and the scraping member 8 moves along the front-back direction to move from one scraping position to another scraping position. In the projection along the front-back direction, the scraping driving member 7 is located between the two scraping edges 81. Thus, it can be ensured that the scraping driving member 7 stably drives the scraping member 8 to move relative to the mounting body 1.

[0158] In addition, the mounting body 1 includes a blanking port 13. The waste scraped from the waste receiving surface 11 by the scraping member 8 can be discharged out of the mounting body 1 through the blanking port 13. Furthermore, the waste discharged from the blanking port 13 can be collected or further processed. The blanking port 13 and the waste receiving surface 11 are distributed along the moving direction of the scraping member 8 to facilitate the scraping member 8 to scrape the waste on the waste receiving surface 11 into the blanking port 13 when moving.

[0159] Specifically, as Figure 1 and Figure 6 shown, the mounting body 1 includes a blanking port 13 and a waste receiving surface 11. Figure 1 The front-back direction shown in is the moving direction of the scraping member 8. The blanking port 13 is located at the rear side of the waste receiving surface 11. In this way, when the scraping member 8 starts to move backward from the Figure 6 scraping position shown in, it can scrape the waste on the waste receiving surface 11 into the blanking port 13.

[0160] Furthermore, the scraping member 8 is also connected with a second elastic member 52. The scraping driving member 7 is adapted to push the scraping member 8 to move from the blanking port 13 to one side of the waste receiving surface 11. The second elastic member 52 is used to drive the scraping member 8 to move from one side of the waste receiving surface 11 to the blanking port 13 after the scraping driving member 7 withdraws the thrust.

[0161] Specifically, the second elastic member 52 has a certain elastic force and can undergo a certain degree of elastic deformation to provide an elastic force for the scraping driving structure 6 to reset the scraping member 8 after scraping, as Figure 9As shown, the second elastic member 52 extends in the front-rear direction. The rear end of the second elastic member 52 can be in pressing connection with the scraping driving structure 6, and the front end of the second elastic member 52 can be in pressing connection with the mounting body 1. Thus, the second elastic member 52 is connected between the scraping driving structure 6 and the mounting body 1.

[0162] Therefore, when the scraping driving member 7 is not triggered, the scraping member 8 is located at the material dropping opening 13. When the scraping driving member 7 contacts the tool head 102 and is pushed backward by the tool head 102, the scraping driving member 7 will drive the scraping member 8 to move from back to front, that is, to move from the material dropping opening 13 to one side of the waste receiving surface 11. And when the scraping driving member 7 drives the scraping driving structure 6 to move forward relative to the mounting body 1, the second elastic member 52 will be gradually compressed or stretched. When the scraping driving structure 6 drives the scraping member 8 to move forward to the maximum stroke, that is, when it is located at the frontmost end of the waste receiving surface 11, the second elastic member 52 is no longer compressed or stretched. At this time, the front end surface of the scraping member 8 is flush with the front end surface of the mounting body 1 ( Figure 6 the position shown in, which is also a scraping position), and then the nozzle 1021 sprays waste. After the waste spraying is completed, the nozzle 1021 leaves above the waste receiving surface 11 and continues to move to the right, so that the scraping driving member 7 no longer receives the driving force applied by the tool head 102. At this time, the elastic force for the second elastic member 52 to return to the initial state can be used to apply a force to the scraping driving structure 6, so that the scraping driving structure 6 moves backward relative to the mounting body 1, from one side of the waste receiving surface 11 to the material dropping opening 13, so as to scrape off the waste on the waste receiving surface 11 and fall into the material dropping opening 13 during the movement.

[0163] Therefore, through the elastic force provided by the second elastic member 52, automatic scraping of the waste on the waste receiving surface 11 by the scraping member 8 and automatic reset of the scraping member 8 can be realized, which is flexible and convenient.

[0164] In some embodiments, the second elastic member 52 can be configured as a spring.

[0165] In other embodiments, as Figure 9 shown, the scraping driving structure 6 is located at the rear side of the material dropping opening 13. In this way, the scraping driving structure 6 avoids the material dropping opening 13, which can ensure the smooth movement of the scraping member 8 to realize the scraping process, and the waste smoothly falls into the material dropping opening 13.

[0166] In some embodiments, the scraping driving structure 6 is configured as a frame structure and forms a scraping avoidance space 612, and at least part of the material dropping opening 13 is located in the scraping avoidance space 612.

[0167] It can be understood that the tool head 102 has a certain thickness along the Y direction, that is, the front-to-back direction, and the nozzle 1021 can be set at the front or middle of the tool head 102 along the Y direction. By reasonably setting the position of the scraper driving structure 6, the distance between the nozzle 1021 and the rear of the tool head 102 can be used to achieve triggering. In other words, when the tool head 102 moves to the chassis position of the printer in the Y direction, the nozzle 1021 is still at a certain distance from the frame of the chassis. By using the rear side of the tool head 1021 to trigger the scraper driving component 7, and setting a drop port 13 between the scraper driving component 7 and the nozzle 1021, there is no need to occupy additional space in the chassis, thereby providing space utilization efficiency, facilitating the expansion of the printing area under the same chassis size, and improving printing efficiency.

[0168] Specifically, Figure 9 As shown, the front end portion of the scraper driving structure 6 is constructed as a frame structure, and a scraper avoidance space 612 is formed inside the frame structure, the drop port 13 is located in the scraper avoidance space 612, and the drop port 13 is open in the up and down directions, the frame structure has good stability and high strength, and the drop port 13 can be arranged in the space in the middle of the frame structure, so that the arrangement of the transmission parts is realized, and the space is fully utilized to arrange the drop port 13, and the position change of the scraper member 8 is cleverly utilized. When the waste needs to fall, the scraper member 8 will not block the drop port 13. In addition, the surrounding walls of the frame structure can block the waste to prevent the waste from splashing out during the scraping process.

[0169] In some embodiments, Figure 6 and Figure 9 As shown, the scraper driving structure 6 includes a scraper connecting rod 61 and a sliding block 62. The scraper connecting rod 61 is rotatably mounted on the mounting body 1 through a second rotating shaft 92, so that the scraper connecting rod 61 can rotate relative to the mounting body 1, thus also having the function of stroke amplification.

[0170] The scraper drive member 7 is installed at one end of the scraper connecting rod 61. Figure 9 The rear end of the sliding block 62 and the other end of the scraper connecting rod 61 are Figure 9 The front end of the connection is matched, so that when the scraper connecting rod 61 moves, the sliding block 62 can be driven to move together, such as Figure 6 As shown, a sliding groove is provided on the mounting body 1, and the sliding block 62 is accommodated in the sliding groove to realize the sliding cooperation between the sliding block 62 and the mounting body 1, so that the sliding block 62 can slide back and forth along the sliding groove, thereby realizing the effect that the sliding block 62 can be slidably installed on the mounting body 1, and the scraper member 8 and the sliding block 62 are relatively fixed, and the fixed connection between the scraper member 8 and the sliding block 62 can be realized by bolt connection, welding connection, etc., or the scraper member 8 and the sliding block 62 are integrally formed, and then when the sliding block 62 slides back and forth, it can drive the scraper member 8 to move back and forth, thereby realizing the scraping process.

[0171] Among them, the scraping link 61 is adapted to push the sliding block 62 to slide when rotating to drive the scraping member 8 to move. That is, when the scraping driving member 7 is triggered, it can drive the scraping link 61 to rotate. When the scraping link 61 rotates, it can push the sliding block 62 to slide back and forth along the sliding groove, thereby driving the scraping member 8 to move back and forth.

[0172] In some embodiments, the scraping link 61 includes a pushing section 611 and a follower section 612. The rotating shaft of the scraping link 61 is located at the connection of the pushing section 611 and the follower section 612. The free end of the pushing section 611 is connected to the scraping driving member 7, and the free end of the follower section 612 is connected to the sliding block 62. In this way, when the scraping driving member 7 is triggered, it can first drive the pushing section to rotate around the rotating shaft, and then drive the follower section 612 to rotate around the rotating shaft, so that the follower section 612 drives the sliding block 62 to move, realizing the power transmission from the scraping driving member 7 to the sliding block 62.

[0173] Among them, the length from the free end of the pushing section 611 to the rotating shaft is less than the length from the free end of the follower section 612 to the rotating shaft. In this way, when a force acts on the scraping driving member 7, the pushing section 611 can generate a greater torque, so as to more effectively drive the scraping link 61 and the sliding block to move. And because the length of the follower section 612 is longer, the displacement stroke of driving the sliding block 62 to move is also longer, so that an effect of stroke amplification can be generated, and the moving speed of the scraping member 8 can be made faster. Through experiments, it is found that the agglomerated flushing waste often has high viscosity. By increasing the scraping speed, the contact time between the agglomerated waste and the scraping member 8 can be made shorter, avoiding the agglomerated waste from adhering to the scraping member 8, and ensuring that the scraping member 8 has enough displacement stroke for scraping.

[0174] Specifically, as Figure 9 shown, the rotating shaft of the scraping link 61 is Figure 9 the second rotating shaft 92 shown in. The second rotating shaft 92 is located at the connection of the pushing section 611 and the follower section 612. The free end of the pushing section 611, that is, the upper end, is connected to the scraping driving member 7, and the free end of the follower section 612, that is, the lower end, is connected to the sliding block 62. The length from the free end of the pushing section 611 to the second rotating shaft 92 is less than the length from the free end of the follower section 612 to the second rotating shaft 92.

[0175] In some embodiments, the sliding block 62 is provided with a pushing groove 621, and the other end of the scraping link 61 is provided with a pushing post 611. The pushing post 611 is slidably matched with the pushing groove 621 and is adapted to push the sliding block 62 to move through the inner wall of the pushing groove 621.

[0176] Specifically, as Figure 9As shown, a pushing groove 621 is provided at the rear end of the sliding block 62, and a protruding pushing column 611 is provided at the front end of the scraping link 61. The shape and size of the pushing column 611 match those of the pushing groove 621, so that the pushing column 611 can be received in the pushing groove 621 and can slide relative to the inner wall of the pushing groove 621 when contacting the inner wall of the pushing groove 621. Thus, when the scraping link 61 moves, the pushing column 611 can slide in the pushing groove 621, contact the inner wall of the pushing groove 621, and push the sliding block 62 to move in the front-rear direction through the force generated by this contact.

[0177] In some embodiments, the scraping driving member 7 is configured as a scraping rolling member, and the scraping rolling member 7 is adapted to rollingly contact the tool head 102.

[0178] Specifically, as Figure 4 shown, the scraping driving member 7 is configured as a scraping rolling member. In this way, the scraping driving member 7 can rollingly contact the tool head 102 to trigger the scraping driving member 7. With such a setting, on the one hand, the friction between the tool head 102 and the scraping driving member 7 can be reduced, thereby reducing the wear of the tool head 102 and the scraping driving member 7 and prolonging the service life of the tool head 102. On the other hand, the tool head 102 can trigger the scraping driving member 7 in all directions, thereby improving the operating efficiency of the tool head 102. In some other embodiments, the nozzle wiping driving structure 2 and the scraping driving structure 6 are distributed along the arrangement direction of at least two nozzles 1021.

[0179] Thus, after scraping the waste ejected from each nozzle 1021, the cleaning and wiping work can be carried out on each nozzle 1021 in sequence in a timely manner, thereby greatly improving the cleaning efficiency and avoiding interference between the nozzle wiping driving structure 2 and the scraping driving structure 6, ensuring the orderly and precise progress of the cleaning work.

[0180] In some other embodiments, the nozzle wiping driving structure 2 and the scraping driving structure 6 are distributed along the arrangement direction of at least two nozzles 1021.

[0181] Specifically, as Figure 1 shown, Figure 1 the left-right direction shown in Figure 6As shown, the wiping driving structure 2 and the scraping driving structure 6 are spaced apart in the left - right direction. The wiping driving structure 2 is on the right side and the scraping driving structure 6 is on the left side. When the tool head 102 moves from left to right, the scraping driving member 7 can be triggered first to drive the movement of the scraping driving structure 6, thereby cleaning the waste material flushed on the nozzle 1021. After that, the tool head 102 continues to move to the right and then triggers the wiping driving member 3 to drive the movement of the wiping driving structure 2, thereby realizing the wiping of the nozzle 1021. Of course, since the scraping rolling member can be triggered in all directions, the tool head 102 can also move from front to back first to trigger the scraping driving member 7, and then move from left to right to trigger the wiping driving member 3. It is flexible and convenient, and the movement of the tool head 102 can be set according to actual needs.

[0182] In some embodiments, both the scraping driving member 7 and the wiping driving member 3 are located at the same end of the mounting body 1 in the Y - up direction. The tool head 102 is arranged to move relative to the mounting body 1 in the XY plane, and during the movement of the tool head 102 along the X - direction, it is adapted to trigger the scraping driving member 7 and the wiping driving member 3 in sequence.

[0183] Specifically, as Figure 1 shown, Figure 1 the front - back direction shown in Figure 1 is the Y - direction of the mounting body 1, and the left - right direction shown in Figure 1 is the X - direction of the mounting body 1. Both the scraping driving member 7 and the wiping driving member 3 are located at the rear end of the mounting body 1 and are arranged side by side to facilitate the tool head 102 to trigger the scraping driving member 7 and the wiping driving member 3 in sequence. The tool head 102 is arranged to move relative to the mounting body 1 in the XY plane, that is, the tool head 102 can move relative to the mounting body 1 in the front - back direction, or in the left - right direction, or in other directions. Taking the movement of the tool head 102 in the left - right direction as an example, as

[0184] shown, the wiping direction of the wiping member 4 is the left - right direction. When the tool head 102 moves from left to right, the scraping driving member 7 can be triggered first during the movement to drive the scraping member 8 to move, thereby scraping the waste material ejected from the nozzle 1021. After the scraping is completed, the tool head 102 continues to move to the right and then triggers the wiping driving member 3 to drive the wiping member 4 to move, thereby wiping the nozzle 1021.

[0185] Specifically, as Figure 1 shown, the X - direction is Figure 1In the left - right direction shown in the figure, when the tool head 102 moves from left to right and has not yet contacted the scraping driving member 7, that is, when the scraping driving member 7 is not triggered, the scraping member 8 is located behind the nozzle wiping member 4, that is, the scraping member 8 is farther from the hot bed than the nozzle wiping member 4. This position is the initial position of the scraping member 8. When the tool head 102 continues to move until it triggers the scraping driving member 7, the scraping driving member 7 drives the scraping member 8 to move forward to be flush with the nozzle wiping member 4 along the wiping direction (i.e., the left - right direction), that is, the distances of both from the hot bed are the same. At this time, the nozzle 1021 is located directly above the scraping member 8 and can spray waste material. After spraying the waste material, the scraping driving member 7 drives the scraping member 8 to move backward to perform scraping, and the scraping member 8 returns to the initial position. Then the tool head 102 continues to move to the right, so that the scraping member 8 and the nozzle 1021 are staggered in the left - right direction. The nozzle 1021 moves to the right to be directly opposite the nozzle wiping member 4 in the left - right direction. At this time, as the nozzle 1021 continues to move, the wiping of the nozzle 1021 is realized. In some embodiments, there are two nozzle wiping driving structures 2, and the scraping driving structure 6 is located between the two nozzle wiping driving structures 2. The nozzle wiping members 4 of the two nozzle wiping driving structures 2 are adapted to wipe the two nozzles 1021 respectively.

[0186] In some embodiments, there are two nozzle wiping driving structures 2, and the scraping driving structure 6 is located between the two nozzle wiping driving structures 2. The nozzle wiping members 4 of the two nozzle wiping driving structures 2 are adapted to wipe the two nozzles 1021 respectively.

[0187] That is to say, the two nozzle wiping driving structures 2 and one scraping driving structure 6 can be arranged in a certain direction. One nozzle wiping driving structure 2 is arranged on one side of the scraping driving structure 6, and the other nozzle wiping driving structure 2 is arranged on the other side of the scraping driving structure 6. Thus, when the two nozzles 1021 are in the middle position, that is, above the scraping driving structure 6, waste material can be first ejected to perform scraping. After scraping is completed, the tool head 102 can first move to one side of the scraping driving structure 6 so that one nozzle wiping driving structure 2 can wipe one of the nozzles 1021. After wiping this nozzle 1021, the tool head 102 can continue to move to the other side of the scraping driving structure 6 so that the other nozzle wiping driving structure 2 can wipe the other nozzle 1021. Thus, the space is reasonably utilized to arrange each structure to realize the sequential wiping of the two nozzles 1021.

[0188] In some embodiments, the nozzle wiping driving member 3 is configured to move in a first direction to drive the nozzle wiping member 3 to swing and switch positions, and the nozzle 1021 is arranged to move in a second direction to wipe the nozzle through the nozzle wiping member 4. The first direction is perpendicular to the second direction. That is, the first direction can be the left - right direction, and the second direction can be the front - back direction, the up - down direction, or other directions perpendicular to the left - right direction. Or, the first direction can be the front - back direction, and the second direction can be the left - right direction, the up - down direction, or other directions perpendicular to the front - back direction. Or, the first direction can be the up - down direction, and the second direction can be the left - right direction, the front - back direction, or other directions perpendicular to the up - down direction. As Figure 1 shown, the first direction is Figure 1 the up - down direction shown in Figure 1 it, and the second direction is

[0189] the left - right direction shown in it. Thus, by the nozzle wiping driving member 3 moving in the first direction to drive the nozzle wiping member 4 to swing in the first direction, the switching of the wiping position is realized, and the nozzle 1021 moves in the second direction to wipe the nozzle through the nozzle wiping member 4, so as to ensure that the nozzles 1021 with different heights can be wiped at the appropriate time and position, and the moving direction of the nozzle wiping member 4 does not interfere with the moving direction of the nozzle wiping driving member 3, thus ensuring the smooth progress of the wiping work.

[0190] Furthermore, the swing angle corresponding to the nozzle wiping member 4 switching from one wiping position to another is between 3° and 12°.

[0191] That is to say, the swing angle corresponding to the nozzle wiping member 4 switching from one wiping position to another can be set to 5°, 8°, 10°, 12°, 14°, 16°, 18°, 20° or other angles within this range. In this way, the height of the nozzle wiping member 4 can be changed by flexibly adjusting the swing angle, that is, flexibly switching between one wiping position and another to adapt to the positions of the nozzles 1021 with lower heights and the nozzles 1021 with higher heights, so as to effectively wipe the nozzles 1021 with different heights and prevent the wiping position of the nozzle wiping member 4 from being too high or too low to achieve the best wiping effect.

[0192] The present invention also provides a 3D printing device 100.

[0193] The 3D printing device 100 according to the embodiment of the present invention includes a printer and the 3D printing cleaning mechanism 101 of any one of the above - mentioned embodiments. The printer is movable relative to the mounting body 1, and the tool head 102 of the printer is provided with a nozzle 1021.

[0194] Specifically, the printer can move relative to the mounting body 1 to drive the tool head 102 to move, as Figures 1 - 3As shown, the tool head 102 is located above the 3D printing cleaning mechanism 101 and can move relative to the mounting body 1 so that the nozzle 1021 can be located at the corresponding position to facilitate cleaning of the nozzle 1021. Among them, two nozzles 1021 are arranged on the tool head 102 of the printer 102 at intervals in the left-right direction. The nozzle 1021 on the right side is a fixed nozzle 1021 with a fixed height, and the lifting nozzle 1021 on the left side ( Figure 1 shown in the standby state in the figure), and the lifting nozzle 1021 can extend downward to reduce its height to be in the working state, and after extension, its height is lower than that of the fixed nozzle 1021.

[0195] In some embodiments, the nozzle 1021 on the left side and the nozzle 1021 on the right side can be swapped, that is, the nozzle 1021 on the left side is a fixed nozzle 1021 with a fixed height, and the lifting nozzle 1021 on the right side. The lifting nozzle 1021 can extend downward to reduce its height to be in the working state, and after extension, its height is lower than that of the fixed nozzle 1021. Synchronously, the scraping edge 81 and the waste receiving area 111 can also be set such that the left side is higher and the right side is lower to adapt to the heights of the two nozzles 1021. Correspondingly, the nozzle wiping member 4 can also be arranged on the left side or the right side, and the height change of the nozzle wiping member 4 is adapted to the height of the corresponding nozzle 1021 to be wiped. For example, when the nozzle wiping member 4 is arranged on the right side of the mounting body and the lifting nozzle 1021 is arranged on the right side of the tool head, the nozzle wiping member 4 is in a lower wiping position when wiping the right lifting nozzle 1021, and the nozzle wiping member 4 is in a higher wiping position when wiping the left fixed nozzle 1021.

[0196] Thus, by setting the above-mentioned 3D printing cleaning mechanism 101, effective wiping and cleaning of the nozzles 1021 with different heights of the printer 102 are achieved, ensuring the stability and durability of the printing quality.

[0197] The present invention also proposes a 3D printing cleaning method.

[0198] According to the 3D printing cleaning method of the embodiments of the present invention, the cleaning method is applicable to the cleaning mechanism 101. The cleaning mechanism 101 includes a scraping member 8, a nozzle wiping member 4, and two nozzles 1021 with different heights, and the cleaning method includes:

[0199] S1: Control the tool head 102 to move in the first direction so that the tool head 102 drives the scraping member 8 to scrape the waste under the two nozzles.

[0200] Specifically, as Figure 1As shown, the first direction can be the front-back direction of the cleaning mechanism 101. The tool head 102 can be controlled to move in the front-back direction to trigger the scraping driving member 7, thereby driving the scraping member 8 to move in the front-back direction to scrape off the waste below the two nozzles 102.

[0201] S2: Control the tool head 102 to move in the second direction so that the nozzle 1021 passes through the nozzle wiping member 4 for wiping, and the second direction intersects with the first direction.

[0202] Specifically, as Figure 1 shown, the second direction can be the left-right direction of the cleaning mechanism 101. The tool head 102 can be controlled to move in the left-right direction to pass through the nozzle wiping member 4 for wiping to clean the nozzle 1021.

[0203] In some embodiments, controlling the tool head 102 to move in the second direction includes:

[0204] S21a: Control the tool head 102 to move to a position where the two nozzles 1021 are on the first side of the nozzle wiping member 4, and drive the tool head 102 to move in the second direction towards the nozzle wiping member 4, so that the nozzle wiping member 4 switches from one wiping position to another wiping position and drives one nozzle close to the nozzle wiping member to pass through the nozzle wiping member;

[0205] Specifically, after scraping is completed, the tool head can be controlled to continue moving to a position where the two nozzles 1021 are on the first side of the nozzle wiping member 4. As Figure 1 shown, the first side can be the right side or the left side. When the fixed nozzle 1021 on the right side needs to be wiped, the tool head 102 can be controlled to continue moving to a position where the two nozzles 1021 are on the left side of the nozzle wiping member 4, and then drive the tool head 102 to move in the left-right direction towards the nozzle wiping member 4, so that the nozzle wiping member 4 switches from a wiping position at a lower height to another wiping position at a higher height, and drives one nozzle 1021 close to the nozzle wiping member 4, that is, the fixed nozzle 1021 on the right side, to pass through the nozzle wiping member 4 to wipe the nozzle 1021.

[0206] Or, S21b: Control the tool head 102 to move to a position where the two nozzles 1021 are on the first side of the nozzle wiping member 4, drive the nozzle wiping member 4 to switch from one wiping position to another wiping position, drive the tool head 102 to move in the second direction, and drive one nozzle 1021 close to the nozzle wiping member 4 to pass through the nozzle wiping member 4.

[0207] Specifically, after scraping is completed, the tool head 102 can be controlled to continue moving to a position where the two nozzles 1021 are on the first side of the nozzle wiping member 4. As Figure 1As shown, the first side can be the right side or the left side. When it is necessary to wipe the fixed nozzle 1021 on the right side, the tool head 102 can be controlled to continue moving until the two nozzles 1021 are located on the left side of the nozzle wiping member 4, and then the nozzle wiping member 4 is driven to switch from a lower wiping position to another higher wiping position. The tool head 102 is driven to move in the left - right direction and drive one nozzle 1021 close to the nozzle wiping member 4, that is, the fixed nozzle 1021 on the right side, to pass through the nozzle wiping member 4 to achieve wiping of this nozzle 1021.

[0208] In some embodiments, the nozzle wiping member 4 has opposite first and second sides along a second direction. The first side of the nozzle wiping member 4 is adjacent to the scraping member 8, and the second side of the nozzle wiping member 4 faces away from the scraping member 8.

[0209] Specifically, as Figure 1 shown, the second direction is Figure 1 the left - right direction shown in. The nozzle wiping member 4 has opposite right and left sides along the left - right direction, that is, the first side is the left side and the second side is the right side. The left side of the nozzle wiping member 4 is adjacent to the scraping member 8, and the right side of the nozzle wiping member 4 faces away from the scraping member 8. Thus, the nozzle wiping member 4 and the scraping member 8 are distributed along the left - right direction, facilitating the tool head 102 to perform scraping treatment and wiping treatment in sequence when moving in the left - right direction, improving the cleaning efficiency.

[0210] In some embodiments, controlling the tool head 102 to move along the second direction includes:

[0211] S21: Control the tool head 102 to move until the two nozzles 1031 are located on the second side of the nozzle wiping member 4. The nozzle wiping member 4 is located at a wiping position. Drive the tool head 102 to move towards the nozzle wiping member 4 along the second direction, and drive the other nozzle 1021 close to the nozzle wiping member 4 to pass through the nozzle wiping member 4.

[0212] Specifically, after scraping is completed, the tool head 102 can be controlled to continue moving until the two nozzles 1031 are located on the right side of the nozzle wiping member 4. At this time, the nozzle wiping member 4 is located at a lower wiping position. The tool head 102 can be driven to move towards the nozzle wiping member 4 along the left - right direction, and drive the other nozzle 1021 close to the nozzle wiping member 4, that is, the lifting nozzle 1021, to pass through the nozzle wiping member 4 to achieve wiping of the lifting nozzle 1021.

[0213] In some embodiments, controlling the tool head 102 to move until the two nozzles 1021 are located on the second side of the nozzle wiping member 4 includes:

[0214] S211: Control the tool head 102 to move along a direction having at least a first - direction component, so that the two nozzles 1021 on the tool head 102 bypass the nozzle wiping member 4, and make the other nozzle 1021 closer to the nozzle wiping member 4 than one nozzle 1021.

[0215] That is to say, the tool head 102 can be controlled to move along the right front direction so that the two nozzles 1021 on the tool head 102 bypass the nozzle wiping member 4, and the other nozzle 1021, i.e., the lifting nozzle 1021, is closer to the nozzle wiping member 4 than one nozzle 1021, i.e., the fixed nozzle 1021, so as to move the tool head 102 to a position where the two nozzles 1021 are on the right side of the nozzle wiping member 4, and then the wiping of the lifting nozzle 1021 can be realized.

[0216] In some embodiments, controlling the tool head 102 to move in the first direction includes:

[0217] S11a: Controlling the tool head 102 to reciprocate in the first direction so that the scraping member 8 scrapes the waste material under the two nozzles 1021 repeatedly.

[0218] Specifically, the tool head 102 can be controlled to reciprocate along the front-back direction so that the scraping member 8 can reciprocate along the front-back direction, thereby scraping the waste material under the two nozzles 1021 repeatedly, achieving thorough scraping of the waste material, and preventing residual waste material from remaining.

[0219] In other embodiments, controlling the tool head 102 to move in the first direction includes:

[0220] S11b: Controlling the tool head 102 to reciprocate in the second direction so that the nozzle 1021 passes by the nozzle wiping member 4 for repeated wiping.

[0221] Specifically, the tool head 102 can be controlled to reciprocate along the left-right direction so that when the nozzle wiping member 4 is in a wiping position, the lifting nozzle 1021 can pass by the nozzle wiping member 4 for repeated wiping, achieving thorough wiping of the lifting nozzle 1021 and improving the cleanliness of the lifting nozzle 1021. And the tool head 102 can be controlled to reciprocate along the left-right direction so that when the nozzle wiping member 4 is in another wiping position, the fixed nozzle 1021 can pass by the nozzle wiping member 4 for repeated wiping, achieving thorough wiping of the fixed nozzle 1021 and improving the cleanliness of the fixed nozzle 1021.

[0222] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0223] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A 3D printed cleaning mechanism, characterized in that: include: Mounting body; a wiping nozzle driving structure, the wiping nozzle driving structure being movably mounted on the mounting body, the wiping nozzle driving structure being mounted with a wiping nozzle driving member and a wiping nozzle member, the wiping nozzle driving member and the wiping nozzle member being spaced apart, and the wiping nozzle member being used to wipe the nozzle of the tool head; Wherein, the wiping nozzle driving member is suitable for driving the wiping nozzle driving structure to move relative to the mounting body to drive the wiping nozzle member to switch from one wiping position to another wiping position, and the one wiping position is different from the other wiping position at least in the height direction.

2. The 3D printing cleaning mechanism according to claim 1, characterized in that: The wiping nozzle driving member and the wiping nozzle member are respectively arranged at two ends of the wiping nozzle driving structure, and the middle part of the wiping nozzle driving structure is rotatably connected to the mounting body; Or, the wiping nozzle driving structure is rotatably mounted on the mounting body, and the wiping nozzle driving member and the wiping nozzle member are both arranged on one side of the rotating shaft of the wiping nozzle driving structure; Alternatively, the wiper nozzle driving structure is slidably connected to the mounting body, and the wiper nozzle driving member drives the wiper nozzle member to switch from the one wiping position to the other wiping position, and the wiper nozzle member is suitable for switching from the other wiping position to the one wiping position under the action of gravity, magnetic force and / or elastic force.

3. The 3D printing cleaning mechanism according to claim 1, characterized in that: The mouth-wiping member is detachably mounted on the mouth-wiping driving structure; and / or, the another wiping position is higher in height direction than the one wiping position; And / or, one of the nozzle wiping member and the nozzle wiping driving structure is provided with a limiting protrusion and the other is provided with a limiting groove, and the plugging direction of the limiting protrusion and the limiting groove intersects with the wiping direction of the nozzle.

4. The 3D printing cleaning mechanism according to claim 1, characterized in that: The mouth wiping piece is formed with a wiping groove, the nozzle of the tool head is suitable for passing through the mouth wiping piece from the wiping groove, the tool head is provided with a trigger part, the tool head has two nozzles, and the two nozzles are suitable for entering the wiping groove in sequence; Wherein, the triggering part is configured to trigger the wiping nozzle driving member in a partial stroke when the two nozzles successively enter the wiping groove, so that the height position of the wiping groove corresponds to the height position of the nozzle.

5. The 3D printing cleaning mechanism according to claim 4, characterized in that: One of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle; The rotating shaft of the wiping nozzle driving structure is located between the wiping nozzle member and the wiping nozzle driving member, the height of the wiping nozzle member in the initial state corresponds to the lowest position or working position of the lifting nozzle, and the trigger part is used to drive the wiping nozzle member to rise; or, The rotating shaft of the nozzle wiping driving structure is located at one side of the nozzle wiping driving member and the nozzle wiping member, the triggering part is used to drive the nozzle wiping member to be lowered, and the initial state of the nozzle wiping member corresponds to the position of the fixed nozzle.

6. The 3D printing cleaning mechanism according to claim 4, characterized in that: One of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle, and when the mouth wiping member is directly opposite to the lifting nozzle in the wiping direction, the triggering part is used to drive the mouth wiping member to be lowered or the mouth wiping member is in the lowest position; And / or, when the mouth-wiping member is facing the fixed nozzle in the wiping direction, the triggering part is used to drive the mouth-wiping member to rise or the mouth-wiping member to be in the highest position.

7. The 3D printing cleaning mechanism according to claim 6, characterized in that: The mouth wiping member is located on one side of the fixed nozzle, and the trigger portion is centrally arranged relative to the tool head; Wherein, in the projection along the first direction, the center of the trigger portion is located in the middle between the centers of the two nozzles, and the distance between the trigger portion and the center of the nozzle is between 2-15 mm, and / or, in the projection along the first direction, the ratio of the distance D1 between the trigger portion and the center projection of the mouth wiper to the distance D2 between the centers of the two nozzles is between 0.4-0.

6.

8. The 3D printing cleaning mechanism according to claim 4, characterized in that: The trigger portion is configured as a trigger protrusion having a guide slope, and the guide slope is suitable for pushing the wiper nozzle driving member.

9. The 3D printing cleaning mechanism according to claim 1, characterized in that: The wiper nozzle driving member is constructed as an active member, and is used to actively drive the wiper nozzle driving structure to drive the wiper nozzle member to move.

10. The 3D printing cleaning mechanism according to claim 1, characterized in that: It also includes a first elastic member, which is connected between the wiping nozzle drive structure and the mounting body, and is used to apply an elastic force to the wiping nozzle drive structure to switch the wiping nozzle member from the other wiping position to the one wiping position, and the one wiping position is lower than the other wiping position.

11. The 3D printing cleaning mechanism according to claim 1, characterized in that: It also includes a scraper driving structure, which is movably mounted on the mounting body, and is equipped with a scraper driving member and a scraper member; Wherein, the scraper driving member is suitable for driving the scraper member to move relative to the mounting body to drive the scraper member to move from one scraping position to another scraping position, and the scraper member includes two scraping edges, and the two scraping edges are different at least in the height direction.

12. The 3D printing cleaning mechanism according to claim 11, characterized in that: One of the two scraping edges is higher than the other scraping edge; Wherein, the tool head is provided with two nozzles, one of the two nozzles is configured as a lifting nozzle and the other is configured as a fixed nozzle, the lifting nozzle is in a working state when it is located at the lower limit position, and the lifting nozzle is lower than the fixed nozzle at the lower limit position.

13. The 3D printing cleaning mechanism according to claim 11, characterized in that: The mounting body is provided with a waste receiving surface, the waste receiving surface includes two waste receiving areas, one of the two waste receiving areas is higher than the other, and the two scraping edges are suitable for scraping materials from the two waste receiving areas in a one-to-one correspondence; and / or, in a projection along the movement direction of the scraper member, the scraper driving member is located between two of the scraper edges; Furthermore, the mounting body comprises a material drop opening, and the material drop opening and the waste receiving surface are distributed along the moving direction of the scraper; The scraper member is further connected to a second elastic member, the scraper driving member is suitable for pushing the scraper member to move from the material drop opening to one side of the waste receiving surface, and the second elastic member is used to drive the scraper member to move from one side of the waste receiving surface to the material drop opening after the scraper driving member removes the thrust; And / or, the scraper driving structure is located at the rear side of the material dropping opening.

14. The 3D printing cleaning mechanism according to claim 13, characterized in that: The scraper driving structure is constructed as a frame-type structure and is provided with a scraper avoidance space, and at least a portion of the material drop opening is located in the scraper avoidance space.

15. The 3D printing cleaning mechanism according to claim 14, characterized in that: The scraper driving structure includes a scraper connecting rod and a sliding block. The scraper driving member is connected to the scraper connecting rod. The scraper connecting rod is rotatably mounted on the mounting body. The sliding block is slidably mounted on the mounting body. The sliding block is relatively fixed to the scraper member. The scraper connecting rod is suitable for pushing the sliding block to slide when rotating to drive the scraper member to move.

16. The 3D printing cleaning mechanism according to claim 15, characterized in that: The scraper connecting rod includes a pushing section and a following section, the rotating shaft of the scraper connecting rod is located at the connection between the pushing section and the following section, the free end of the pushing section is connected to the scraper driving member, the free end of the following section is connected to the sliding block, and the length from the free end of the pushing section to the rotating shaft is shorter than the length from the free end of the following section to the rotating shaft.

17. The 3D printing cleaning mechanism according to claim 15, characterized in that: The sliding block is provided with a pushing groove, and the other end of the scraper connecting rod is provided with a pushing column, the pushing column is slidably matched with the pushing groove and is suitable for pushing the sliding block to move through the inner wall of the pushing groove.

18. The 3D printing cleaning mechanism according to claim 11, characterized in that: The scraper driving member is configured as a scraper rolling member, and the scraper rolling member is adapted to be in rolling contact with the tool head; And / or, the wiping nozzle driving structure and the scraper driving structure are distributed along the arrangement direction of at least two of the nozzles.

19. The 3D printing cleaning mechanism according to claim 11, characterized in that: The scraper drive member and the wiping nozzle drive member are both located at the same end of the mounting body in the Y direction, the tool head is configured to move in the XY plane relative to the mounting body, and the tool head is suitable for triggering the scraper drive member and the wiping nozzle drive member in sequence during the movement of the tool head along the X direction.

20. The 3D printing cleaning mechanism according to claim 19, characterized in that: When the scraper driving member is not triggered, the scraper member is further away from the hot bed than the wiping member; Furthermore, after the scraper driving member is triggered and drives the scraper member to scrape, the scraper member and the nozzle are staggered along the X direction, and the nozzle and the nozzle wiping member are opposite to each other along the X direction.

21. The 3D printing cleaning mechanism according to claim 11, characterized in that: There are two wiping nozzle drive structures, the scraper drive structure is located between the two wiping nozzle drive structures, and the wiping nozzle members of the two wiping nozzle drive structures are suitable for wiping the two nozzles respectively.

22. The 3D printing cleaning mechanism according to claim 1, characterized in that: The nozzle wiping driving member is configured to move in a first direction to drive the nozzle wiping member to swing and switch positions, and the nozzle is configured to move in a second direction to wipe the nozzle through the nozzle wiping member, the first direction being perpendicular to the second direction; Wherein, the swing angle corresponding to the switching of the mouth wiping member from the one wiping position to the other wiping position is between 3° and 12°.

23. A 3D printing device, characterized in that: The invention comprises a printer and a 3D printing cleaning mechanism as described in any one of claims 1 to 22, wherein the printer is movable relative to the mounting body, and a tool head of the printer is provided with a nozzle.

24. A 3D printing cleaning method, characterized in that: The cleaning method is applicable to a cleaning mechanism, wherein the cleaning mechanism comprises a scraper, a mouth wiping member and two nozzles, and the two nozzles are at different heights, and the cleaning method comprises: Controlling the tool head to move along a first direction so that the tool head drives the scraper to scrape the waste material under the two nozzles; The tool head is controlled to move along a second direction so that the nozzle passes through the wiper to be wiped, and the second direction intersects with the first direction.

25. The 3D printing cleaning method according to claim 24, characterized in that: The controlling the tool head to move along the second direction comprises: Control the tool head to move until the two nozzles are located on the first side of the mouth wiper, and drive the tool head to move along the second direction toward the mouth wiper, so that the mouth wiper switches from one wiping position to another wiping position and drives one of the nozzles close to the mouth wiper to pass through the mouth wiper; or, The tool head is controlled to move until the two nozzles are located on the first side of the mouth wiper, the mouth wiper is driven to switch from one wiping position to another wiping position, the tool head is driven to move along the second direction and drive one of the nozzles close to the mouth wiper to pass through the mouth wiper.

26. The 3D printing cleaning method according to claim 25, characterized in that: The mouth wiper has the first side and the second side opposite to each other along the second direction. The first side of the mouth wiper is adjacent to the scraper member, and the second side of the mouth wiper is away from the scraper member.

27. The 3D printing cleaning method according to claim 24, characterized in that: The controlling the tool head to move along the second direction comprises: The tool head is controlled to move until the two nozzles are located on the second side of the mouth wiper, and the mouth wiper is located at a wiping position, and the tool head is driven to move along the second direction toward the mouth wiper, and another nozzle close to the mouth wiper is driven to pass through the mouth wiper.

28. The 3D printing cleaning method according to claim 27, characterized in that: Controlling the tool head to move until the two nozzles are located on the second side of the mouth wiper comprises: The tool head is controlled to move in a direction having at least a first direction component so that two of the nozzles on the tool head bypass the mouth wiper and another of the nozzles is closer to the mouth wiper than one of the nozzles.

29. The 3D printing cleaning method according to claim 24, characterized in that: Controlling the tool head to move along the first direction comprises: Controlling the tool head to reciprocate along the first direction so that the scraper scrapes the waste material under the two nozzles repeatedly; and / or, Controlling the tool head to move along the second direction comprises: The tool head is controlled to reciprocate along the second direction so that the nozzle passes through the wiping piece for repeated wiping.

Images