Gantry and 3D printing device using same

Abstract

Embodiments of the present application provide a gantry and a 3D printing device using same. The 3D printing device comprises a nozzle assembly and a build platform. The 3D printing device further comprises the gantry, a first driving assembly, and a second driving assembly. The gantry comprises a frame, a connecting structure, and a positioning structure which are integrally formed or detachably arranged; the frame is used for supporting the gantry; the first driving assembly is mounted on the connecting structure and used for driving the nozzle assembly; and the second driving assembly is mounted on the positioning structure and used for driving the build platform.

Description

Gantry and 3D printing device using the same

[0001] The present application claims priority to the Chinese Patent Application No. 202411392184.0, filed on September 30, 2024, and entitled “3D printing device”, the content of which is incorporated herein by reference in its entirety. The present application claims priority to the Chinese Patent Application No. 202422417140.0, filed on September 30, 2024, and entitled “Gantry structure and 3D printing device using the same”, the content of which is incorporated herein by reference in its entirety. The present application claims priority to the Chinese Patent Application No. 202422425120.8, filed on September 30, 2024, and entitled “Support and 3D printing device using the same”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of 3D printing, and in particular to a gantry and a 3D printing device using the same. BACKGROUND

[0003] 3D printing technology is a rapid prototyping technology that uses special wax material, powdered metal or plastic and other adhesive materials to manufacture three-dimensional objects by printing layer by layer based on digital model files. Fused deposition modeling technology is one of the main 3D printing technologies. This technology melts and extrudes hot melt material from the nozzle, and deposits it on the forming platform or the previously solidified material, finally generating a real object.

[0004] Fused deposition modeling 3D printing technology usually needs to move the nozzle assembly by the driving assembly to complete printing, and the precision of movement is directly related to the printing precision. The overall installation precision of the 3D printing device will directly affect the printing precision. Moreover, the current 3D printing is gradually popularized to the personal user market, and how to reduce the installation difficulty of the 3D printing device and improve the installation precision, printing precision and aesthetic degree of the 3D printing device is a problem that needs to be considered by those skilled in the art. SUMMARY

[0005] In order to solve the problems in the prior art, the present application provides a gantry and a 3D printing device using the same, which have lower installation difficulty and higher installation precision and printing precision.

[0006] The embodiment of the present application provides a 3D printing device, which comprises a nozzle assembly and a forming platform, and further comprises a gantry, a first driving assembly and a second driving assembly, wherein the gantry comprises a frame, a connecting structure and a positioning structure, the frame is used for supporting the gantry, the first driving assembly is installed on the connecting structure and is used for driving the nozzle assembly, and the second driving assembly is installed on the positioning structure and is used for driving the forming platform.

[0007] In an embodiment, the connecting structure comprises a first connecting part arranged at a side of the frame, and the first connecting part is used for guiding the nozzle assembly; and a second connecting part arranged at a bottom of the frame, and the second connecting part is used for installing the first driving assembly.

[0008] In an embodiment, the first driving assembly comprises a driving part used for outputting a rotating torque, a transmission wheel set comprising a driving wheel and a driven wheel, the driving wheel is in transmission connection with the driving part, the driving wheel and the driven wheel are in transmission connection through a transmission belt, and a transmission shaft in transmission connection with the driven wheel; wherein the driving part and the transmission wheel set are connected to the second connecting part, and the transmission shaft is used for driving the nozzle assembly to move along the first connecting part.

[0009] In an embodiment, the first connecting part is provided with a first assembly cavity, and at least part of the transmission shaft is accommodated in the first assembly cavity.

[0010] In an embodiment, the second connecting part is provided with a second assembly cavity, and the transmission wheel set is arranged in the second assembly cavity; and the transmission shaft extends from the second assembly cavity to the first assembly cavity.

[0011] In an embodiment, the frame is provided with a second assembly opening, the first connecting part is provided with a first assembly opening, the second assembly opening and the first assembly opening are located on two sides of the first assembly cavity along a first direction and are respectively in communication with the first assembly cavity, and the second assembly opening and the first assembly opening are used for exposing the transmission shaft.

[0012] In an embodiment, the first driving assembly comprises two transmission shafts, and the two transmission shafts are arranged on two sides opposite to each other of the driving part along the first direction; the transmission wheel set comprises one driving wheel, two driven wheels and two tensioning wheels, the two driven wheels are respectively in transmission connection with one transmission shaft, one tensioning wheel is located between the driving wheel and one driven wheel along the first direction, another tensioning wheel is located between the driving wheel and another driven wheel along the first direction, and the tensioning wheels are used for tensioning the transmission belt.

[0013] In an embodiment, the first connecting portion is provided with a recessed and / or protruding guide structure in a second direction, the guide structure being used for guiding movement of the nozzle assembly in a third direction, the second direction intersecting the third direction.

[0014] In an embodiment, the second driving assembly comprises a guide portion fixedly connected with the positioning structure, and a first driving transmission structure connected with the guide portion and the forming platform respectively, and used for driving the forming platform to move relative to the guide portion.

[0015] In an embodiment, the positioning structure comprises a positioning base plate fixedly connected with a frame, and the guide portion is arranged on a surface of the positioning base plate and is lockingly connected with the positioning base plate, so as to position the second driving assembly.

[0016] In an embodiment, the 3D printing device further comprises a third driving assembly drivingly connected with the nozzle assembly and used for driving the nozzle assembly to move in a first direction, the third driving assembly is drivingly connected with the first driving assembly and movably connected with the connecting structure, so as to drive the nozzle assembly to move in a third direction; and a base assembly connected with the gantry through the second driving assembly.

[0017] It can be understood that the gantry of the 3D printing device comprises a frame, a connecting structure and a positioning structure which are integrally formed or detachably arranged, so as to facilitate installation and placement of the gantry itself and ensure installation precision of the gantry structure.

[0018] Embodiments of the present application provide a gantry applied to a 3D printing device, the gantry comprising: a frame which is an integrally formed annular structure; and a connecting structure connected with the frame and integrally formed, the connecting structure being formed with a guide structure on an outer side or an inner side of the connecting structure.

[0019] In an embodiment, the frame comprises different side edges arranged at intervals in a first direction, the connecting structure comprises a first connecting portion, and the different side edges are respectively provided with the first connecting portion, and the first connecting portion is formed with the guide structure.

[0020] In an embodiment, the first connecting portion arranged on each of the different side edges is protrudingly arranged towards an inner side of the frame in the first direction, or the first connecting portion arranged on each of the different side edges is protrudingly arranged towards an outer side of the frame in the first direction.

[0021] In an embodiment, the first connecting part arranged on one of the side edges is arranged to protrude towards the inner side of the frame along the first direction, and the first connecting part arranged on the other side edge is arranged to protrude towards the outer side of the frame along the first direction.

[0022] In an embodiment, the first connecting part is arranged to pass through the side edge along the first direction.

[0023] In an embodiment, the frame comprises side edges arranged at intervals along a first direction, and the connecting structure is arranged on the side edges, and the guide structure is formed by the connecting structure being recessed and / or protruded along a second direction intersecting the first direction.

[0024] In an embodiment, two outer surfaces of the connecting structure opposite along the second direction are respectively provided with the guide structure, and the guide structure is formed by being recessed towards the inner side of the connecting structure and / or protruded towards the outer side of the connecting structure along the second direction.

[0025] In an embodiment, two inner surfaces of the connecting structure arranged at intervals along the second direction are respectively provided with the guide structure, and the guide structure is formed by being recessed towards the outer side of the connecting structure and / or protruded towards the inner side of the connecting structure along the second direction.

[0026] In an embodiment, the frame comprises two side edges arranged at intervals along a first direction, and the frame further comprises a bottom edge and a top edge arranged at intervals along a third direction, and the top edge, one of the side edges, the bottom edge and the other side edge are sequentially connected to form the frame; the frame further comprises a support part located at the outer side of the side edge and the bottom edge, and the bottom edge, the side edge, the support part and the two side edges are integrally formed, and the support part is used for supporting the frame.

[0027] It can be understood that the gantry of the present application has an integrally formed frame, which facilitates the installation and placement of the gantry itself and ensures the installation accuracy of the gantry; the connecting structure and the frame are constructed as an integral part, and the connecting structure can be connected to the frame without other subsequent installation procedures, avoiding errors caused by installation, while ensuring the relative position accuracy between the connecting structure and the frame, ensuring the printing accuracy and reducing the installation difficulty.

[0028] The embodiment of the present application provides a gantry applied to a 3D printing device, the gantry comprising: a frame used for providing support for the gantry; and a connecting structure connected to the frame, wherein the connecting structure is provided with a first assembly cavity used for accommodating a transmission part of the 3D printing device; and wherein the frame is provided with a first through slot in communication with the first assembly cavity.

[0029] In an embodiment, the gantry further comprises a cover plate, the cover plate is detachably arranged in the first through slot.

[0030] In an embodiment, the frame is provided with a first opening and a second opening which are arranged in the first direction, the first opening and the second opening are respectively communicated with the first assembly cavity; the first through slot is communicated with the first assembly cavity through the first opening, and the projection of the first through slot along the first direction is greater than the projection of the first opening along the first direction.

[0031] In an embodiment, the cover plate is provided with a first connecting structure, the connecting structure is provided with a second connecting structure, and the first connecting structure and the second connecting structure are configured to be detachably matched.

[0032] In an embodiment, the frame comprises connected side edges and top edges, the side edges are connected with the connecting structure, and the top edges are arranged in the connecting structure, and the side edges and the top edges are configured to have the same thickness.

[0033] In an embodiment, the frame and the connecting structure are arranged side by side along the second direction, and the connecting structure is convexly arranged in the middle region of the frame along the second direction.

[0034] In an embodiment, the connecting structure is integrally arranged with the frame or detachably connected with the frame.

[0035] In an embodiment, the connecting structure comprises two first connecting parts arranged at two side edges of the frame respectively, and a second connecting part arranged at a bottom edge of the frame; at least one of the two first connecting parts is integrally arranged with the corresponding side edge, and / or the second connecting part is integrally arranged with the bottom edge.

[0036] In an embodiment, the frame further comprises a matching accommodation part which is integrally arranged with the frame or detachably connected with the frame, and the matching accommodation part is provided with a matching accommodation cavity; the first connecting part is provided with the first assembly cavity which is communicated with the matching accommodation cavity; and the second connecting part is provided with a second assembly cavity which is communicated with the matching accommodation cavity.

[0037] It can be understood that the gantry provided by the embodiments of the present application has a frame capable of providing support, the connecting structure is arranged in a suitable position by being connected to the frame, the first assembly cavity is arranged in the connecting structure, the first assembly cavity can accommodate the transmission member of the 3D printing device, the frame is further provided with the first through slot which is communicated with the first assembly cavity, the first through slot provides shielding and protection for the transmission member of the 3D printing device, facilitates operation, improves the appearance of the product, and reduces the probability of failure caused by external factors. BRIEF DESCRIPTION OF DRAWINGS

[0038] Fig. 1 is a perspective view of a 3D printing device according to an embodiment of the present application.

[0039] Fig. 2 is another perspective view of a 3D printing device according to an embodiment of the present application.

[0040] Fig. 3 is a perspective view of a gantry of a 3D printing device according to an embodiment of the present application.

[0041] Fig. 4 is another perspective view of a gantry of a 3D printing device according to an embodiment of the present application.

[0042] Fig. 5 is a sectional view of Fig. 4 along the direction of V-V.

[0043] Fig. 6 is a partial view of a 3D printing device according to an embodiment of the present application.

[0044] Fig. 7 is a partial view of a 3D printing device according to an embodiment of the present application.

[0045] Fig. 8 is a sectional view of Fig. 6 along the direction of VIII-VIII.

[0046] Fig. 9 is a sectional view of Fig. 6 along the direction of IX-IX.

[0047] Fig. 10 is an enlarged view of a region X of Fig. 9.

[0048] Fig. 11 is an enlarged view of a region XI of Fig. 9.

[0049] Fig. 12 is a partial view of a 3D printing device according to an embodiment of the present application.

[0050] Fig. 13 is a sectional view of Fig. 12 along the direction of XIII-XIII.

[0051] Fig. 14 is a view of a frame and a connecting structure of a gantry of a 3D printing device according to an embodiment of the present application.

[0052] Fig. 15 is a view of a frame and a connecting structure of a gantry of a 3D printing device according to another embodiment of the present application.

[0053] Fig. 16 is a view of a frame and a connecting structure of a gantry of a 3D printing device according to still another embodiment of the present application.

[0054] Fig. 17 is a view of a frame and a connecting structure of a gantry of a 3D printing device according to yet another embodiment of the present application.

[0055] Fig. 18 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to an embodiment of the present application.

[0056] Fig. 19 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to another embodiment of the present application.

[0057] Fig. 20 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to yet another embodiment of the present application.

[0058] Fig. 21 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to still another embodiment of the present application.

[0059] Fig. 22 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to another embodiment of the present application.

[0060] Fig. 23 is a structural schematic diagram of a guide structure of a connecting structure of a gantry of a 3D printing device according to another embodiment of the present application.

[0061] Fig. 24 is a structural schematic diagram of a frame of a gantry cooperating with a connecting structure according to an embodiment of the present application.

[0062] Fig. 25 is a structural schematic diagram of a frame of a gantry cooperating with a connecting structure according to another embodiment of the present application.

[0063] Fig. 26 is a structural schematic diagram of a frame of a gantry cooperating with a connecting structure according to yet another embodiment of the present application.

[0064] Fig. 27 is a structural schematic diagram of a frame of a gantry cooperating with a connecting structure according to still another embodiment of the present application.

[0065] Fig. 28 is a perspective view of a gantry at an angle according to an embodiment of the present application.

[0066] Fig. 29 is a perspective view of a gantry at another angle according to an embodiment of the present application.

[0067] Fig. 30 is a partial sectional view of Fig. 29 along XIII-XIII direction.

[0068] Fig. 31 is a sectional view of Fig. 29 along XIV-XIV direction.

[0069] Fig. 32 is a partial enlarged view of a region XV of Fig. 31.

[0070] Fig. 33 is a partial enlarged view of a region XVI of Fig. 31.

[0071] Fig. 34 is a perspective view of a 3D printing device according to an embodiment of the present application.

[0072] Fig. 35 is a perspective view of a gantry provided by an embodiment of the present application.

[0073] Fig. 36 is an exploded perspective view of the gantry provided by an embodiment of the present application.

[0074] Fig. 37 is an enlarged view of region III of Fig. 36.

[0075] Fig. 38 is a view of a cover plate of the gantry provided by an embodiment of the present application.

[0076] Fig. 39 is a perspective view of the gantry cooperating with a Z-axis driving assembly provided by an embodiment of the present application.

[0077] Fig. 40 is a sectional view of Fig. 39 along the direction of VI-VI.

[0078] Fig. 41 is a schematic view of a 3D printing device provided by an embodiment of the present application.

[0079] Notes: 1-3D printing device; 10-gantry; 11-frame; 111-side; 112-bottom; 113-top; 114-supporting part; 1140-mating cavity; 1141-third assembly opening; 117-second assembly opening; 12-connection structure; 121-first connection part; 1210-first assembly cavity; 1211-track strip; 1212-first assembly opening; 1213-guiding structure; 1215-assembly end; 1216-mating end; 122-second connection part; 1220-second assembly cavity; 1222-connection piece; 128-inner surface; 129-outer surface; 13-positioning structure; 131-positioning bottom plate; 132-positioning side plate; 14-first driving assembly; 141-driving part; 142-transmission wheel set; 1421-driving wheel; 1422-driven wheel; 1423-tension wheel; 1424-transmission belt; 143-transmission shaft; 15-second driving assembly; 151-guiding part; 152-first driving transmission structure; 153-connection frame; 16-third driving assembly; 161-rail; 162-sliding structure; 1621-sliding connection block; 1622-pulley; 1623-guiding shaft; 163-sliding ring; 164-second driving transmission structure; 17-molding platform; 18-base assembly; 19-nozzle assembly; X-first direction; Y-second direction; Z-third direction; 20-gantry; 21-frame; 211-side; 212-bottom; 213-top; 214-supporting part; 2140-mating cavity; 2141-third assembly opening; 215-first surface; 216-second surface; 217-second assembly opening; 22-connection structure; 221-first connection part; 2210-first assembly cavity; 2211-track strip; 2212-first assembly opening; 2213-guiding structure; 2215-assembly end; 22150-assembly structure; 2216-mating end; 222-second connection part; 2221-first positioning part; 2222-second positioning part; 228-inner surface; 229-outer surface; 3-3D printing device; 30-gantry; 31-frame; 311-side; 312-bottom; 313-top; 314-mating receiving part; 3140-mating receiving cavity; 316-first through slot; 317-second through slot; 32-connection structure; 321-first connection part; 3210-first assembly cavity; 3211-first opening; 3212-second opening; 3213-guiding structure; 322-second connection part; 3220-second assembly cavity; 33-cover plate; 331-first surface; 332-second surface; 3321-first region; 3322-second region; 341-first connection structure; 3411-first sub-connection piece; 3412-second sub-connection piece; 3413-third sub-connection piece; 342-second connection structure; 35-Z-axis driving assembly; 351-driving part; 352-transmission wheel set; 3521-driving wheel;3522 - driven wheel; 3523 - tension wheel; 3524 - transmission belt; 353 - transmission member; 36 - X-axis driving assembly; 361 - guide rail; 362 - sliding structure; 363 - guide shaft; 39 - nozzle.

[0080] The following detailed description will further describe the present application with reference to the above figures. DETAILED DESCRIPTION

[0081] The following description will refer to the accompanying drawings, which are meant to be exemplary embodiments of the present application. However, the present application can be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" or "said" are used in this specification and / or claims, they are intended to be inclusive (meaning that there can be additional items) and / or to be construed as functionally open-ended (meaning that an item or items can have additional functions), unless otherwise indicated. Additionally, unless otherwise indicated, all content such as text, figures, tables, etc. in this specification is meant to be illustrative only and not restrictive; and, unless otherwise indicated, the content is not meant to be limiting in any way.

[0082] The following will describe the exemplary embodiments with reference to the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; rather, the same or similar components will be assigned the same or similar reference numerals or similar technical terms.

[0083] The following detailed description of the application will be made with reference to the accompanying drawings.

[0084] As shown in FIG. 1 and FIG. 2, the 3D printing device 1 provided by the embodiment of the present application comprises a nozzle assembly 19 and a forming platform 17, and further comprises a gantry 10, a first driving assembly 14 and a second driving assembly 15. The gantry 10 comprises a frame 11, a connecting structure 12 and a positioning structure 13 which are integrally formed or detachably arranged, the frame 11 is used for supporting the gantry 10; the first driving assembly 14 is installed on the connecting structure 12, and the first driving assembly 14 is used for driving the nozzle assembly 19; and the second driving assembly 15 is installed on the positioning structure 13, and the second driving assembly 15 is used for driving the forming platform 17.

[0085] It can be understood that the gantry 10 of the 3D printing device 1 comprises the frame 11, the connecting structure 12 and the positioning structure 13 which are integrally formed or detachably arranged, so as to facilitate the installation and placement of the gantry 10 and ensure the installation accuracy of the gantry 10.

[0086] In an embodiment, the connecting structure 12 and the positioning structure 13 are integrally formed with the frame 11, so that the connecting structure 12 and the positioning structure 13 are connected to the frame 11 without assembling, thereby avoiding errors caused by installation and ensuring the relative position accuracy between the connecting structure 12, the positioning structure 13 and the frame 11, guaranteeing the printing accuracy and reducing the installation difficulty. On this basis, the first driving assembly 14 is installed on the connecting structure 12, which can improve the installation accuracy of the first driving assembly 14 and improve the movement accuracy of the first driving assembly 14 in driving the nozzle assembly 19, thereby guaranteeing the printing accuracy; and the second driving assembly 15 is installed on the positioning structure 13, which can improve the installation accuracy of the second driving assembly 15 and improve the movement accuracy of the second driving assembly 15 in driving the forming platform 17, thereby guaranteeing the printing accuracy.

[0087] Specifically, the gantry 10 installed in the 3D printing device 1 usually needs to present a support structure such as a ring or a frame 11 shape and needs to be placed vertically, so that it can realize the driving function in cooperation with other component assemblies in at least two directions. However, such structure and corresponding placement method will cause the gantry 10 to have unstable gravity center, be easy to shake and be inconvenient to install. The gantry 10 of the present application has an integrally formed ring-shaped frame 11, the frame 11 has good self-supporting property and relatively stable gravity center position, is convenient to carry and place and can also meet the cooperation requirement with other component assemblies; the integrally formed frame 11 makes each side of the ring-shaped structure have good connection effect, and the ring-shaped frame 11 will not scatter and deform, on the one hand, the frame 11 will not deform or dislocate in the process of carrying and cooperating with other component assemblies for installation, and on the other hand, the integrally formed frame 11 is also very convenient to place, greatly reduces the installation difficulty and greatly improves the accuracy.

[0088] Further, the connecting structure 12 and the positioning structure 13 are integrally formed with the frame 11, and in particular, the positioning structure 13 is integrally formed with the frame 11, and the positioning structure 13 and the frame 11 have a relatively stable position. In the installation process of the gantry 10 of the present application, the gantry 10 can be placed through the frame 11, the positioning structure 13 and the frame 11 integrally formed have a clear relative position, the second driving assembly 15 is connected with the positioning structure 13, the forming platform 17 is connected with the second driving assembly 15, and the second driving assembly 15 and the forming platform 17 have a clear relative position.

[0089] Meanwhile, the guide rail 161 of the gantry 10 structure of the present application is integrally formed with the frame 11, and the relative position of the guide rail 161 and the frame 11 is fixed, which greatly reduces the installation tolerance, greatly reduces the difficulty of tolerance design, and greatly improves the precision. Furthermore, the guide rail 161 of the gantry 10 structure of the present application is integrally formed with the frame 11, and the installation sequence and method of the frame 11 and the guide rail 161 do not need to be considered, which greatly reduces the installation difficulty, and avoids the occurrence of poor printing effect or even equipment damage due to installation errors.

[0090] In an embodiment, the connecting structure 12 and the positioning structure 13 are detachably connected with the frame 11, and the connecting structure 12 and the positioning structure 13 can be detachably connected with the frame 11 by clamping, hinging, threaded connection, etc. The connecting structure 12 and the positioning structure 13 have connecting limiting structures (not shown in the figure) with the frame 11, respectively, to avoid installation errors as much as possible and ensure the relative position between the connecting structure 12 and the positioning structure 13 and the frame 11. At the same time, the detachably arranged connecting structure 12, positioning structure 13 and frame 11 can be disassembled and repackaged during transportation, etc., to avoid transportation difficulties caused by the large overall size.

[0091] Specifically, the gantry 10 installed in the 3D printing equipment 1 usually needs to present a support structure such as a ring or a frame 11 shape and needs to be placed vertically, so that it can drive other components in at least two directions. However, such structure and corresponding placement method will make the gantry 10 have the problems of large size, difficult transportation, etc. The gantry 10 of the present application has a frame 11, a connecting structure 12 and a positioning structure 13 which can be detachably connected; during transportation, etc., the gantry 10 can be disassembled into the frame 11, the connecting structure 12 and the positioning structure 13, which facilitates re-arrangement, making it easier to transport and / or store; during use, the frame 11, the connecting structure 12 and the positioning structure 13 can be assembled again into the gantry 10.

[0092] Meanwhile, the portal frame 10 has a ring-shaped frame 11, and the connecting structure 12 and the positioning structure 13 can be respectively installed at corresponding positions of the ring-shaped frame 11. The ring-shaped frame 11 has good support and a relatively stable gravity center position, facilitating transportation and placement and meeting the needs of cooperation with other components.

[0093] For ease of understanding, the first direction X, the second direction Y, and the third direction Z are introduced in the embodiments of the present application for description. The first direction X, the second direction Y, and the third direction Z are three mutually non-parallel directions in a spatial coordinate system. In subsequent embodiments, the first direction X, the second direction Y, and the third direction Z are taken as three mutually perpendicular reference directions in a three-dimensional Cartesian coordinate system for description. The directions shown in the embodiments of the present application are used to help understand the mutual positional relationship of components, but the specific directions are not limited.

[0094] Further in combination with FIGS. 3-6, in an embodiment, the frame 11 includes a support portion 114, a bottom edge 112, a top edge 113, and two side edges 111. The bottom edge 112, one side edge 111, the top edge 113, and the other side edge 111 are sequentially and end-to-end connected to form a ring structure, that is, the bottom edge 112 and the top edge 113 are located between the two side edges 111 along the first direction X and are connected with the two side edges 111, respectively. The connecting structure 12 is arranged on the inner side of the ring structure and is connected with the bottom edge 112 and the two side edges 111, and the support portion 114 is arranged on the outer side of the ring structure and is connected with the bottom edge 112 and the two side edges 111.

[0095] In the embodiment, the two side edges 111 are arranged at intervals along the first direction X, the bottom edge 112 and the top edge 113 are arranged at intervals along the third direction Z, the two side edges 111 are both arranged in a long strip shape along the third direction Z, and the bottom edge 112 and the top edge 113 are both arranged in a strip shape along the first direction X. The width direction of the bottom edge 112, the top edge 113, and the two side edges 111 corresponds to the second direction Y, and the projection of the bottom edge 112, the top edge 113, and the two side edges 111 in the second direction Y is a rectangle with a circular chamfer (i.e., the ring structure). It can be understood that the ring structure does not refer to a circular or elliptical shape, but refers to a structure having a continuous and complete boundary and being hollow.

[0096] In an embodiment, the bottom edge 112, the side edge 111, the support portion 114, and the two side edges 111 are integrally formed. The support portion 114 is located on the outer side of the side edge 111 and the bottom edge 112, and is arranged at the junction of the bottom edge 112 and the side edge 111. The support portion 114 is used to support the frame 11.

[0097] In the embodiment, the annular structure formed by the bottom edge 112, one side edge 111, the top edge 113 and the other side edge 111 connected in sequence has a circular chamfer, which can improve the safety and aesthetics of the frame 11. Meanwhile, the number of support portions 114 can be two, and the two support portions 114 are respectively located on the two sides of the frame 11. The frame 11 is approximately a triangular structure with a circular arc long side. The right angle of the support portion 114 is used to contact the bearing surface. Meanwhile, the support portion 114 has a certain width, which can improve the stability of the gantry 10 structure.

[0098] In an embodiment, the connecting structure 12 includes a first connecting portion 121 and a second connecting portion 122. The first connecting portion 121 is arranged on the side edge 111 of the frame 11, and the first connecting portion 121 is used to guide the nozzle assembly 19. The second connecting portion 122 is arranged on the bottom edge 112 of the frame 11.

[0099] In the embodiment, the first connecting portion 121 is located on the inner side of the side edge 111 of the frame 11, and the second connecting portion 122 is located on the inner side of the bottom edge 112 of the frame 11.

[0100] As shown in FIGS. 14 to 17, in other embodiments, the positions of the first connecting portion 121 and the second connecting portion 122 relative to the frame 11 can also be other manners.

[0101] As shown in FIG. 14, in other embodiments, the first connecting portion 121 is located on the outer side of the side edge 111 of the frame 11, and the second connecting portion 122 is located on the inner side of the bottom edge 112 of the frame 11. The projection of the first connecting portion 121 along the first direction X at least partially coincides with the projection of the second connecting portion 122 along the first direction X, and the first connecting portion 121 and the second connecting portion 122 can be communicatively arranged in the corresponding projection coinciding portion.

[0102] As shown in FIG. 15, in other embodiments, the first connecting portion 121 is located on the outer side of the side edge 111 of the frame 11, and the second connecting portion 122 is located on the outer side of the bottom edge 112 of the frame 11. The length of the second connecting portion 122 along the first direction X is greater than the length of the bottom edge 112 along the first direction X. The first connecting portion 121 is arranged to extend along the third direction Z to the side where the second connecting portion 122 is located, so that the first connecting portion 121 and the second connecting portion 122 can be communicatively arranged.

[0103] As shown in FIG. 16, in other embodiments, the first connecting portion 121 is located on the inner side of the side edge 111 of the frame 11, and the second connecting portion 122 is located on the outer side of the bottom edge 112 of the frame 11. The projection of the first connecting portion 121 along the third direction Z at least partially coincides with the projection of the second connecting portion 122 along the third direction Z, and the first connecting portion 121 and the second connecting portion 122 can be communicatively arranged in the corresponding projection coinciding portion.

[0104] As shown in FIG. 17, in other embodiments, the first connecting portion 121 can be arranged through the side edge 111 along the first direction X, and / or the second connecting portion 122 can be arranged through the bottom edge 112 along the third direction Z, so that the first connecting portion 121 and the second connecting portion 122 are arranged in communication at the connection (or the projection overlap).

[0105] As understood by those skilled in the art, the arrangement positions of the first connecting portion 121 and the second connecting portion 122 relative to the frame 11 can be changed, and the first connecting portion 121 and the second connecting portion 122 are preferably arranged in communication so as to accommodate the first driving assembly 14 in the connecting structure 12 and ensure the transmission arrangement of the first driving assembly 14; the first connecting portion 121 and the second connecting portion 122 can also be arranged not in communication, and the corresponding first driving assembly 14 can be arranged to be exposed outside the connecting structure 12.

[0106] Further in combination with FIGS. 3-5, in an embodiment, the first connecting portion 121 includes an integrally formed track strip 1211, an assembly end 1215, and a matching end 1216, and the two sides of the track strip 1211 are connected with the assembly end 1215 and the matching end 1216, respectively. The assembly end 1215 is located on the side of the first connecting portion 121 close to the top edge 113, the matching end 1216 is located on the side of the first connecting portion 121 close to the bottom edge 112, and the track strip 1211 is located between the assembly end 1215 and the matching end 1216. The second connecting portion 122 is arranged along the first direction X and extends from the bottom edge 112, and the two first connecting portions 121 are arranged along the first direction X and located on both sides of the second connecting portion 122 and connected with the second connecting portion 122, respectively.

[0107] In the present embodiment, the connecting structure 12 includes two first connecting portions 121 arranged on the two side edges 111, respectively. In other embodiments, the number of the first connecting portions 121 can be only one, and one connecting portion is arranged on the side edge 111 and connected with the second connecting portion 122 arranged on the bottom edge 112.

[0108] In an embodiment, the first connecting portion 121 is provided with a first assembly cavity 1210 for accommodating at least part of the transmission shaft 143 of the first driving assembly 14.

[0109] In an embodiment, the frame 11 is provided with a second assembly opening 117, and the first connecting portion 121 is provided with a first assembly opening 1212. The second assembly opening 117 and the first assembly opening 1212 are arranged on both sides of the first assembly cavity 1210 along the first direction X and in communication with the first assembly cavity 1210, respectively, and the second assembly opening 117 and the first assembly opening 1212 are used to expose the transmission shaft 143.

[0110] It can be understood that the first assembly cavity 1210 is used for accommodating the transmission shaft 143, and the first assembly cavity 1210 extends along the third direction Z. On the other hand, the second assembly opening 117 exposes the inside of the first assembly cavity 1210, and the inside of the first assembly cavity 1210 and the transmission shaft 143 arranged therein can be observed or other operations can be performed through the second assembly opening 117.

[0111] In an embodiment, the first connecting portion 121 is provided with the first assembly opening 1212 penetrating along the first direction X, and the first assembly cavity 1210 is in communication with the first assembly opening 1212. The side 111 is provided with the second assembly opening 117 along the first direction X, and the first assembly cavity 1210 is in communication with the second assembly opening 117.

[0112] In an embodiment, the first connecting portion 121 includes two track strips 1211 spaced apart along the second direction Y, and the first assembly cavity 1210 is located between the two track strips 1211. The first assembly opening 1212 is arranged between the two track strips 1211.

[0113] In an embodiment, each track strip 1211 is provided with a guide structure 1213 recessed toward a side where the first assembly cavity 1210 is located along the second direction Y, and the guide structure 1213 is spaced apart from the first assembly cavity 1210.

[0114] It can be understood that the guide structure 1213 is used for accommodating the guide shaft 1623, and the guide structure 1213 and the first assembly cavity 1210 extend along the same direction. Further, the guide structure 1213 extends along the third direction Z.

[0115] Further in combination with FIGS. 18-23, in an embodiment, the first connecting portion 121 is provided with the recessed and / or protruding guide structure 1213 along the second direction Y, and the guide structure 1213 is used for guiding the movement of the nozzle assembly 19 along the third direction Z. The second direction Y intersects the third direction Z.

[0116] It can be understood that the guide structure 1213 can be used for guiding the driving structure, which includes but is not limited to an optical axis, a guide wheel with a protruding surface, a guide wheel with a groove, etc. Correspondingly, the guide structure 1213 can be protruding or grooved to match different forms of the driving structure.

[0117] Further in combination with FIGS. 18 and 19, in an embodiment, the connecting structure 12 is provided with the guide structure 1213 on the two opposite outer surfaces 129 along the second direction Y, and the guide structure 1213 is recessed toward the inner side of the connecting structure 12 and / or protruded toward the outer side of the connecting structure 12.

[0118] As shown in FIG. 18, in this embodiment, the guide structure 1213 located on the outer surface 129 is recessed towards the inner side of the connecting structure 12 along the second direction Y.

[0119] As shown in FIG. 19, in this embodiment, the guide structure 1213 located on the outer surface 129 is protruded towards the outer side of the connecting structure 12 along the second direction Y.

[0120] Further in combination with FIG. 20 and FIG. 23, in an embodiment, the first connecting portion 121 of the connecting structure 12 has a recess in the middle and forms a space, and the two inner surfaces 128 of the first connecting portion 121 spaced along the second direction Y are respectively provided with a guide structure 1213, and the guide structure 1213 is recessed towards the outer side of the connecting structure 12 along the second direction Y and / or protruded towards the inner side of the connecting structure 12 along the second direction Y.

[0121] As shown in FIG. 20, the guide structure 1213 located on the inner surface 128 is recessed towards the outer side of the connecting structure 12 along the second direction Y.

[0122] As shown in FIG. 21, the guide structure 1213 located on the inner surface 128 is protruded towards the inner side of the connecting structure 12 along the second direction Y.

[0123] As shown in FIG. 22, in an embodiment, one of the two inner surfaces 128 of the connecting structure 12 spaced along the second direction Y is provided with a guide structure 1213, and the corresponding guide structure 1213 is recessed towards the outer side of the connecting structure 12 along the second direction Y; and one of the two outer surfaces 129 of the connecting structure 12 opposite along the second direction Y is provided with a guide structure 1213, and the corresponding guide structure 1213 is protruded towards the outer side of the connecting structure 12 along the second direction Y.

[0124] As shown in FIG. 23, in an embodiment, one of the two inner surfaces 128 of the connecting structure 12 spaced along the second direction Y is provided with a guide structure 1213, and the corresponding guide structure 1213 is protruded towards the inner side of the connecting structure 12 along the second direction Y; and one of the two outer surfaces 129 of the connecting structure 12 opposite along the second direction Y is provided with a guide structure 1213, and the corresponding guide structure 1213 is recessed towards the inner side of the connecting structure 12 along the second direction Y.

[0125] Further in combination with FIG. 6 and FIG. 7, in an embodiment, the first driving assembly 14 comprises a driving part 141, a transmission wheel set 142, and a transmission shaft 143. The driving part 141 is connected with the connecting piece 1222 of the second connecting part 122, and the driving part 141 is configured to output a rotating torque. The transmission wheel set 142 comprises a driving wheel 1421 and a driven wheel 1422, the driving wheel 1421 is in transmission connection with the driving part 141, and the driving wheel 1421 and the driven wheel 1422 are in transmission connection through a transmission belt 1424. The transmission shaft 143 is in transmission connection with the driven wheel 1422. Wherein, the driving part 141 and the transmission wheel set 142 are connected with the second connecting part 122, and the transmission shaft 143 is configured to drive the nozzle assembly 19 to move along the first connecting part 121.

[0126] In an embodiment, the second connecting part 122 is provided with a second assembly cavity 1220, and the second assembly cavity 1220 is configured to accommodate the transmission wheel set 142 of the first driving assembly 14. The transmission shaft 143 of the first driving assembly 14 can extend from the second assembly cavity 1220 to the first assembly cavity 1210.

[0127] In the embodiment, the driving part 141 is connected with the connecting piece 1222 of the second connecting part 122, and the transmission shaft 143 of the driving part 141 extends into the second assembly cavity 1220. The transmission wheel set 142 is arranged in the second assembly cavity 1220, and the transmission shaft 143 extends from the second assembly cavity 1220 to the first assembly cavity 1210.

[0128] In an embodiment, the first driving assembly 14 comprises two transmission shafts 143, and the two transmission shafts 143 are arranged on two sides of the driving part 141 in the first direction X. The transmission wheel set 142 comprises one driving wheel 1421, two driven wheels 1422, and two tensioning wheels 1423. The two driven wheels 1422 are respectively in transmission connection with one transmission shaft 143. One tensioning wheel 1423 is arranged between the driving wheel 1421 and one driven wheel 1422 in the first direction X, and the other tensioning wheel 1423 is arranged between the driving wheel 1421 and the other driven wheel 1422 in the first direction X. The tensioning wheels 1423 are configured to tension the transmission belt 1424.

[0129] In the embodiment, the driving part 141 is reversely buckled on the connecting piece 1222, the connecting piece 1222 is extended from one side of the second connecting part 122, the second assembly cavity 1220 is also arranged corresponding to the connecting piece 1222, the output shaft (not shown in the figure) of the driving part 141 extends to the second assembly cavity 1220 through the bottom edge 112 along the third direction Z, the driving wheel 1421 is drivingly connected with the output shaft of the driving part 141 located in the second assembly cavity 1220, and the driving part 141 drives the driving wheel 1421 to rotate. The two driven wheels 1422 are arranged on the two sides opposite to the driving wheel 1421 along the first direction X and are used for drivingly connecting with the transmission shaft 143 located in the second assembly cavity 1220; the two tension wheels 1423 are arranged on the two sides opposite to the driving wheel 1421 along the first direction X, and the tension wheel 1423 can be arranged to be rotatably connected with the bottom edge 112 or the second connecting part 122.

[0130] It can be understood that the driving wheel 1421, the two driven wheels 1422 and the two tension wheels 1423 can be constructed to be located in substantially the same horizontal plane; the tension wheel 1423 arranged between the driving wheel 1421 and the driven wheel 1422 is constructed to be arranged offset from the line connecting the driving wheel 1421 and the driven wheel 1422, or it can be understood that the tension wheel 1423 and the corresponding driving wheel 1421 and driven wheel 1422 are not arranged on the same straight line along the first direction X, and are used for tensioning the transmission belt 1424.

[0131] In the embodiment, the transmission belt 1424 extends from the driving wheel 1421 to one tension wheel 1423, further extends to one driven wheel 1422, further extends to the other driven wheel 1422, further extends to the tension wheel 1423, and then extends to the driving wheel 1421 to complete the closed loop. The driving part 141 drives the driving wheel 1421 to rotate, the driving wheel 1421 drives the transmission belt 1424 to rotate, the transmission belt 1424 drives the two driven wheels 1422 to rotate synchronously, and the two synchronous wheels drive the two transmission shafts 143 to rotate respectively.

[0132] It can be understood that the driving part 141 is arranged through the connecting piece 1222 on the second connecting part 122, the second connecting part 122 is arranged on the gantry 10, and the driving part 141 is positioned with the gantry 10 through the connection with the connecting piece 1222. The driving wheel 1421, the driven wheel 1422 and the tension wheel 1423 are accommodated in the second assembly cavity 1220, that is, the transmission cooperation with the driving part 141 and the transmission shaft 143 can be realized, and the transmission wheel set 142 is hidden, the space utilization is improved, and the product is more beautiful. The transmission shaft 143 is arranged to extend along the third direction Z, the transmission shaft 143 is used for drivingly connecting with the third driving assembly 16, and the third driving assembly 16 is driven to drive the nozzle assembly 19 to move along the third direction Z through rotation.

[0133] Further in combination with the drawings shown in FIG. 6, FIG. 8 to FIG. 10, in an embodiment, the 3D printing device 1 further comprises a third driving assembly 16, the third driving assembly 16 is drivingly connected with the nozzle assembly 19 and is used to drive the nozzle assembly 19 to move along the first direction X, the third driving assembly 16 is drivingly connected with the first driving assembly 14 and is movably connected with the connecting structure 12 to drive the nozzle assembly 19 to move along the third direction Z.

[0134] In the embodiment, the third driving assembly 16 is drivingly connected with the transmission shaft 143, the third driving assembly 16 is slidingly guided with the first connecting portion 121 through the guide structure 1213, so that the transmission shaft 143 can drive the third driving assembly 16 to move along the third direction Z under the guidance of the guide structure 1213, and further drive the nozzle assembly 19 arranged on the third driving assembly 16 to move along the third direction Z.

[0135] It can be understood that the third driving assembly 16 can be a linear driving mechanism, which is drivingly connected with the nozzle assembly 19 and can drive the nozzle assembly 19 to move along the first direction X.

[0136] In an embodiment, the third driving assembly 16 comprises a guide rail 161, a sliding structure 162, a sliding ring 163, and a second driving transmission structure 164. The guide rail 161 extends along the first direction X and is arranged between the two first connecting portions 121, and the guide rail 161 is provided with a sliding structure 162 at each end along the first direction X. The sliding structure 162 is slidingly matched with the guide structure 1213, so that the guide rail 161 can slide along the third direction Z. Each sliding structure 162 is drivingly connected with the transmission shaft 143 through a sliding ring 163, the sliding ring 163 is sleeved outside the transmission shaft 143, and the sliding ring 163 and the transmission shaft 143 can be drivingly connected through, for example, threads, to convert the rotary motion of the transmission shaft 143 into the linear motion of the sliding ring 163 along the third direction Z, so as to drive the guide rail 161 and the nozzle assembly 19 to move along the third direction Z through the sliding structure 162. The second driving transmission structure 164 is installed on the guide rail 161 and is drivingly connected with the nozzle assembly 19, and the second driving transmission structure 164 is used to cooperate with the guide rail 161 to drive the nozzle assembly 19 to move along the first direction X to realize 3D printing.

[0137] In the embodiment, the guide rail 161 extends along the first direction X, and the guide rail 161 is generally provided with a rail groove for guidance, and the nozzle assembly 19 can be movably connected with the guide rail 161 through the rail groove.

[0138] In the embodiment, the guide structure 1213 is a groove-shaped structure recessed along the second direction Y, and the sliding structure 162 includes a sliding connecting block 1621, a pulley 1622, and a guide shaft 1623. The guide shaft 1623 is an optical axis extending along the third direction Z, and the guide shaft 1623 is arranged in the guide structure 1213 to position the guide structure 1213. The pulley 1622 is arranged outside the first connecting part 121, and the pulley 1622 and the guide structure 1213 are located on opposite sides of the guide shaft 1623 along the second direction Y, respectively. The sliding connecting block 1621 is connected with the sliding ring 163 and the plurality of pulleys 1622, respectively. The sliding ring 163 is driven by the transmission shaft 143 to drive the sliding connecting block 1621 to move along the third direction Z under the guidance of the pulley 1622 and the guide shaft 1623. The sliding connecting block 1621 is further connected with the guide rail 161, so that the guide rail 161 drives the nozzle assembly 19 to move along the third direction Z.

[0139] In other embodiments, if the guide structure 1213 is protruding, the sliding structure 162 can not include the guide shaft 1623, and the pulley 1622 can be directly guided and connected with the guide structure 1213.

[0140] It can be understood that the transmission shaft 143 arranged in the first assembly cavity 1210 is exposed through the first assembly opening 1212 and the second assembly opening 117, so that the assembly of the sliding structure 162 and the sliding ring 163 with the transmission shaft 143 is more convenient.

[0141] Further in combination with FIG. 11, in an embodiment, the support part 114 is provided with a matching cavity 1140 corresponding to the first assembly cavity 1210, and a third assembly opening 1141 communicating the first assembly cavity 1210 with the matching cavity 1140. The first assembly cavity 1210, the third assembly opening 1141, and the matching cavity 1140 cooperate to accommodate the transmission shaft 143. During assembly, the transmission shaft 143 can pass through the third assembly opening 1141 from the matching cavity 1140 and further extend into the first assembly cavity 1210.

[0142] Further in combination with FIG. 12 and FIG. 13, in an embodiment, the second driving assembly 15 includes a guide part 151 and a first driving transmission structure 152. The guide part 151 is fixedly connected with the positioning structure 13, and the first driving transmission structure 152 is connected with the guide part 151 and the forming platform 17, respectively, for driving the forming platform 17 to move relative to the guide part 151.

[0143] In an embodiment, the positioning structure 13 is connected with the bottom edge 112 or the second connecting part 122 of the frame 11 and is integrally formed. The positioning structure 13 includes a positioning bottom plate 131 fixedly connected with the frame 11, and the guide part 151 is arranged on the surface of the positioning bottom plate 131 and connected with the positioning bottom plate 131 for positioning the second driving assembly 15.

[0144] It can be understood that the positioning structure 13 is integrally formed on the gantry 10, and no additional mounting process is required between the frame 11 and the positioning structure 13. The positioning structure 13 has higher precision than the frame 11, and the second driving assembly 15 is mounted and positioned with the positioning structure 13. The installation of the second driving assembly 15 can be directly positioned, and the position precision of the second driving assembly 15 relative to the gantry 10 is ensured, thereby improving the printing precision.

[0145] In the embodiment, the first driving transmission structure 152 can further include a driving motor, a transmission belt, a rotating wheel and other components with driving and / or transmission functions. The specific connection mode, positional relationship and working principle are not described herein. The first driving transmission structure 152 is connected with the guide portion 151 to realize installation and positioning, and is further positioned through the positioning relationship between the guide portion 151 and the positioning structure 13, so as to ensure the precision of driving the forming platform 17 to move.

[0146] In the embodiment, the positioning structure 13 further includes two positioning side plates 132, which are respectively arranged on the two sides of the positioning bottom plate 131 along the first direction X. The length direction of the positioning bottom plate 131 corresponds to the second direction Y, and the width direction of the second bottom plate corresponds to the first direction X. The two positioning side plates 132 are located on the two sides of the positioning bottom plate 131 along the first direction X.

[0147] In the embodiment, the second driving assembly 15 further includes a connecting frame 153, and the first driving transmission structure 152 is in transmission connection with the forming platform 17 through the connecting frame 153. The connecting frame 153 is in sliding connection with the guide plate, and is used for guiding the forming platform 17 along the second direction Y.

[0148] Further in combination with FIG. 1 and FIG. 2, in an embodiment, the 3D printing device 1 further includes a base assembly 18, which is connected with the gantry 10 through the second driving assembly 15.

[0149] It can be understood that the base assembly 18 can be used to accommodate other components in the 3D printing device 1, such as a display, a control circuit, etc. The second driving assembly 15 is connected and positioned with the gantry 10 through the positioning structure 13, the base assembly 18 is connected with the second driving assembly 15 and is further connected and positioned with the gantry 10, which can reduce the installation difficulty and improve the printing precision.

[0150] In the embodiment, to improve the space utilization of the 3D printing device 1, the base assembly 18 is inlaid with the second driving assembly 15. That is, the second driving assembly 15 and the base assembly 18 are respectively positioned with the gantry 10, at the same time, the second driving assembly 15 and the base assembly 18 have substantially the same thickness along the third direction Z, and the second driving assembly 15 and the base assembly 18 are substantially arranged in the same layer, so that the second driving assembly 15 is inlaid in the interior of the base assembly 18 to save space and improve the aesthetic degree.

[0151] In other embodiments, the base assembly 18 can also be connected with the gantry 10 through the second driving assembly 15. It can be understood that the second driving assembly 15 is connected with the gantry 10 through the positioning structure 13 to have high installation precision, and the base assembly 18 is further connected with the second driving assembly 15, so that the installation process of the base assembly 18 is simple and has high precision.

[0152] As shown in FIGS. 24-34, the embodiment of the present application provides a gantry 20, which comprises a frame 21 and a connecting structure 22. The frame 21 is an annular structure formed integrally, and the connecting structure 22 is connected with the frame 21 and formed integrally. The connecting structure 22 is formed with a guide structure 2213 on the outer side or the inner side of the connecting structure 22.

[0153] It can be understood that the gantry 20 of the present application has the frame 21 formed integrally, which is convenient for the installation and placement of the gantry 20 itself, and ensures the installation precision of the gantry 20. The connecting structure 22 and the frame 21 are constructed as an integral formation, without the need to connect the connecting structure 22 with the frame 21 through assembly, which avoids errors caused by installation, at the same time, ensures the relative position between the connecting structure 22 and the frame 21, guarantees the printing precision and reduces the installation difficulty.

[0154] Specifically, the gantry 20 installed in the 3D printing device usually needs to present a support structure in the shape of a ring or a frame 21 and needs to be placed vertically so that it can cooperate with other components to realize the driving function in at least two directions. However, such a structure and the corresponding placement method can cause the gantry 20 to have an unstable center of gravity, be prone to shaking, and be inconvenient to install. The gantry 20 of the present application has an integrally formed ring-shaped frame 21. The frame 21 has good self-supporting properties and a relatively stable center of gravity, which facilitates handling and placement and also meets the needs of cooperation with other components. The integrally formed frame 21 makes the edges of the ring-shaped structure have good connection effects. The ring-shaped frame 21 will not scatter and deform. On the one hand, the frame 21 will not deform or misalign during handling and installation with other components. On the other hand, the integrally formed frame 21 is also very convenient to place, greatly reducing the installation difficulty and greatly improving the accuracy. It needs to be explained that the "ring-shaped structure" does not necessarily refer to a regular or irregular circle, but can also be other shapes that are connected at the end.

[0155] At the same time, the guide rail of the gantry 20 of the present application is integrally formed with the frame 21. The relative position of the guide rail and the frame 21 is fixed, which greatly reduces the installation tolerance, greatly reduces the difficulty of tolerance design, and greatly improves the accuracy. Furthermore, the guide rail of the gantry 20 of the present application is integrally formed with the frame 21. The installation sequence and method of the frame 21 and the guide rail do not need to be considered, which greatly reduces the installation difficulty and avoids the occurrence of poor printing effect or even equipment damage due to installation errors.

[0156] For ease of understanding, the first direction X, the second direction Y and the third direction Z are introduced in the embodiments of the present application for description. The first direction X, the second direction Y and the third direction Z are three mutually non-parallel directions in a spatial coordinate system. In subsequent embodiments, the first direction X, the second direction Y and the third direction Z are taken as three mutually perpendicular reference directions in a three-dimensional Cartesian coordinate system as an example for description. The directions shown in the embodiments of the present application are used to help understand the mutual positional relationship of the parts, but the specific directions are not limited.

[0157] Further in combination with FIGS. 18 to 27, in an embodiment, the connecting structure 22 can have various connection settings compared to the frame 21. The guide structure 2213 can further have various setting methods compared to the connecting structure 22.

[0158] Further in combination with FIGS. 24 to 27, in an embodiment, the frame 21 includes different side edges 211 arranged at intervals along the first direction X. The connecting structure 22 includes a first connecting portion 221. The different side edges 211 are respectively provided with the first connecting portion 221. The first connecting portion 221 is formed with the guide structure 2213.

[0159] It can be understood that the different side edges 211 refer to different side edges 211, and not to emphasize the structural difference between the different side edges 211. The structures of the different side edges 211 can be the same or different.

[0160] As shown in FIG. 24, in an embodiment, the first connecting portions 221 provided on the different side edges 211 are all protruded towards the inner side of the frame 21 along the first direction X.

[0161] As shown in FIG. 25, in an embodiment, the first connecting portions 221 provided on the different side edges 211 are all protruded towards the outer side of the frame 21 along the first direction X.

[0162] As shown in FIG. 26, in an embodiment, the first connecting portions 221 provided on one side edge 211 are protruded towards the inner side of the frame 21 along the first direction X, and the first connecting portions 221 provided on the other side edge 211 are protruded towards the outer side of the frame 21 along the first direction X.

[0163] It can be understood that the first connecting portions 221 can be used to cooperate with the driving structure (such as a guide rail, a pulley, etc.), and the first connecting portions 221 provided on the inner side or the outer side of the side edge 211 can realize the cooperation with the driving structure.

[0164] As shown in FIG. 27, in an embodiment, the first connecting portions 221 are arranged through the side edge 211 along the first direction X.

[0165] In the embodiment, the first connecting portions 221 can be arranged through the side edge 211, that is, the inner side and the outer side of the side edge 211 are both provided with the first connecting portions 221.

[0166] In other embodiments, the connecting structure 22 can also be directly recessed from the side edge 211 having a certain thickness along the first direction X.

[0167] Further in combination with FIGS. 18-23, in an embodiment, the connecting structure 22 is arranged on the side edge 211, and the guide structure 2213 is recessed and / or protruded from the connecting structure 22 along the second direction Y.

[0168] It can be understood that the guide structure 2213 can be used to guide the driving structure, which includes but is not limited to an optical axis, a guide wheel with a protruding surface, a guide wheel with a groove, etc. Correspondingly, the guide structure 2213 can be protruding or grooved to match different forms of the driving structure.

[0169] Further combining FIG. 18 and FIG. 19, in an embodiment, the two outer surfaces 229 of the connecting structure 22 opposite to each other along the second direction Y are respectively provided with a guide structure 2213, and the guide structure 2213 is recessed towards the inner side of the connecting structure 22 along the second direction Y and / or is protruded towards the outer side of the connecting structure 22 along the second direction Y.

[0170] As shown in FIG. 18, in the embodiment, the guide structure 2213 located on the outer surface 229 is recessed towards the inner side of the connecting structure 22 along the second direction Y.

[0171] As shown in FIG. 19, in the embodiment, the guide structure 2213 located on the outer surface 229 is protruded towards the outer side of the connecting structure 22 along the second direction Y.

[0172] Further combining FIG. 20 and FIG. 21, in an embodiment, the two inner surfaces 228 of the connecting structure 22 spaced apart along the second direction Y are respectively provided with a guide structure 2213, and the guide structure 2213 is recessed towards the outer side of the connecting structure 22 along the second direction Y and / or is protruded towards the inner side of the connecting structure 22 along the second direction Y.

[0173] As shown in FIG. 20, the guide structure 2213 located on the inner surface 228 is recessed towards the outer side of the connecting structure 22 along the second direction Y.

[0174] As shown in FIG. 21, the guide structure 2213 located on the inner surface 228 is protruded towards the inner side of the connecting structure 22 along the second direction Y.

[0175] As shown in FIG. 22, in an embodiment, one of the two inner surfaces 228 of the connecting structure 22 spaced apart along the second direction Y is provided with a guide structure 2213, and the corresponding guide structure 2213 is recessed towards the outer side of the connecting structure 22 along the second direction Y; and one of the two outer surfaces 229 of the connecting structure 22 opposite to each other along the second direction Y is provided with a guide structure 2213, and the corresponding guide structure 2213 is protruded towards the outer side of the connecting structure 22 along the second direction Y.

[0176] As shown in FIG. 23, in an embodiment, one of the two inner surfaces 228 of the connecting structure 22 spaced apart along the second direction Y is provided with a guide structure 2213, and the corresponding guide structure 2213 is protruded towards the inner side of the connecting structure 22 along the second direction Y; and one of the two outer surfaces 229 of the connecting structure 22 opposite to each other along the second direction Y is provided with a guide structure 2213, and the corresponding guide structure 2213 is recessed towards the inner side of the connecting structure 22 along the second direction Y.

[0177] Further in combination with FIGS. 28-33, in this embodiment, the frame 21 includes two side edges 211, and the connecting structure 22 includes two first connecting portions 221, each of which is arranged on one of the side edges 211, and each of the outer surfaces 229 of the first connecting portions 221 is provided with a guide structure 2213 in the form of a groove recessed inwardly of the first connecting portion 221.

[0178] In one embodiment, the frame 21 includes a support portion 214, a bottom edge 212, a top edge 213, and two side edges 211, and the bottom edge 212, one side edge 211, the top edge 213, and the other side edge 211 are sequentially and continuously connected to form a ring-shaped structure, i.e., the bottom edge 212 and the top edge 213 are located between the two side edges 211 along the first direction X and are connected to the two side edges 211, respectively. The connecting structure 22 is arranged on the inner side of the ring-shaped structure and is connected to the bottom edge 212 and the two side edges 211, and the support portion 214 is arranged on the outer side of the ring-shaped structure and is connected to the bottom edge 212 and the two side edges 211.

[0179] In this embodiment, the two side edges 211 are arranged at intervals along the first direction X, the bottom edge 212 and the top edge 213 are arranged at intervals along the third direction Z, the two side edges 211 are both arranged in a long strip shape along the third direction Z, and the bottom edge 212 and the top edge 213 are both arranged in a strip shape along the first direction X. The width direction of the bottom edge 212, the top edge 213, and the two side edges 211 corresponds to the second direction Y, and the projection of the bottom edge 212, the top edge 213, and the two side edges 211 in the second direction Y is a rectangle with a circular chamfer (i.e., the ring-shaped structure). It can be understood that the ring-shaped structure does not refer to a circular or elliptical shape, but rather to a structure with a continuous and complete boundary and a hollow shape.

[0180] In one embodiment, the bottom edge 212, the side edge 211, the support portion 214, and the two side edges 211 are integrally formed. The support portion 214 is located on the outer side of the side edge 211 and the bottom edge 212, and is arranged at the junction of the bottom edge 212 and the side edge 211. The support portion 214 is used to support the frame 21.

[0181] In this embodiment, the ring-shaped structure formed by sequentially and continuously connecting the bottom edge 212, one side edge 211, the top edge 213, and the other side edge 211 has a circular chamfer, which can improve the safety and aesthetics of the frame 21. Meanwhile, the number of support portions 214 can be two, and the two support portions 214 are located on the two sides of the frame 21, respectively. The frame 21 is approximately triangular with a circular arc long side, and the right angle of the support portion 214 is used to contact the bearing surface. Meanwhile, the support portion 214 has a certain width, which can improve the stability of the gantry 20.

[0182] In an embodiment, the frame 21 comprises a first surface 215 and a second surface 216 arranged oppositely, the first surface 215 is located inside the connecting structure 22, and the second surface 216 is located outside the connecting structure 22. The connecting structure 22 is arranged on the first surface 215 and protrudes towards the side away from the second surface 216 compared with the first surface 215.

[0183] It can be understood that the first surface 215 is the inner surface 228 of the annular structure of the frame 21, and the second surface 216 is the outer surface 229 of the annular structure of the frame 21. The connecting structure 22 is located on the inner surface 228 of the frame 21 and is integrally formed with the frame 21. The connecting structure 22 can be connected with and integrally formed with the first surface 215. The connecting structure 22 needs to be protrudingly arranged to have a certain thickness in order to achieve the guiding function and form a structure for guiding through the thickness difference.

[0184] In an embodiment, the connecting structure 22 comprises a first connecting part 221 and a second connecting part 222, and the second connecting part 222 is connected with and integrally formed with the first connecting part 221. The first connecting part 221 is arranged on the side edge 211, and the second connecting part 222 is arranged on the bottom edge 212.

[0185] In the embodiment, the first connecting part 221 comprises an integrally formed track strip 2211, an assembly end 2215 and a matching end 2216, and the two sides of the track strip 2211 are connected with the assembly end 2215 and the matching end 2216 respectively. The assembly end 2215 is located on the side of the first connecting part 221 close to the top edge 213, the matching end 2216 is located on the side of the first connecting part 221 close to the bottom edge 212, and the track strip 2211 is located between the assembly end 2215 and the matching end 2216. The second connecting part 222 extends along the first direction X and is arranged on the bottom edge 212. The two first connecting parts 221 are located between the second connecting part 222 along the first direction X and are connected with the second connecting part 222.

[0186] In an embodiment, the connecting structure 22 comprises two first connecting parts 221, and the two first connecting parts 221 are arranged on the two side edges 211 respectively. The connecting structure 22 protrudingly extends towards the inside of the frame 21 along the first direction X.

[0187] It can be understood that the two first connecting parts 221 are protrudingly arranged compared with the frame 21, so that the application has a certain thickness, and a structure for guiding can be formed through the thickness difference.

[0188] In an embodiment, the connecting structure 22 having a certain thickness along the first direction X is provided with a first assembly cavity 2210, and the first assembly cavity 2210 is in communication with the second assembly opening 217. The frame 21 is provided with the second assembly opening 217, and the second assembly opening 217 penetrates through the first surface 215 and the second surface 216.

[0189] It can be understood that the first assembly cavity 2210 is used for accommodating a transmission shaft (not shown in the figure), and the first assembly cavity 2210 extends along the third direction Z. The second assembly opening 217 is arranged to expose the assembly structure 22150 of the assembly end 2215, so that the transmission shaft is more convenient to be fixed with the assembly end 2215. On the other hand, the second assembly opening 217 exposes the inside of the first assembly cavity 2210, and the inside of the first assembly cavity 2210 and the transmission shaft arranged therein can be observed or other operations can be performed through the second assembly opening 217.

[0190] In an embodiment, the two first connecting parts 221 are each provided with a first assembly opening 2212 penetrating along the first direction X, and the first assembly cavity 2210 is in communication with the first assembly opening 2212.

[0191] In the embodiment, the second assembly opening 217 and the first assembly opening 2212 are respectively located on two sides of the first assembly cavity 2210 opposite to each other along the first direction X, and the first assembly opening 2212 is used for exposing the transmission shaft arranged in the first assembly cavity 2210, so as to facilitate the connection of the transmission shaft with a driving assembly of the 3D printing device.

[0192] In an embodiment, the first connecting part 221 includes two track strips 2211 arranged at intervals along the second direction Y, the first assembly cavity 2210 is located between the two track strips 2211, and the first assembly opening 2212 is arranged between the two track strips 2211.

[0193] In an embodiment, each track strip 2211 is provided with a guide structure 2213 recessed towards one side of the first assembly cavity 2210 along the second direction Y, and the guide structure 2213 is arranged at intervals with the first assembly cavity 2210.

[0194] It can be understood that the guide structure 2213 is used for accommodating a guide shaft (not shown in the figure), and the guide structure 2213 is arranged to extend along the same direction as the first assembly cavity 2210, and further, the guide structure 2213 extends along the third direction Z.

[0195] In an embodiment, the support part 214 is provided with a matching cavity 2140 corresponding to the first assembly cavity 2210, and a third assembly opening 2141 in communication with the first assembly cavity 2210 and the matching cavity 2140. The first assembly cavity 2210, the third assembly opening 2141 and the matching cavity 2140 are matched to accommodate the transmission shaft. During assembly, the transmission shaft can pass through the third assembly opening 2141 from the matching cavity 2140 and further extend into the first assembly cavity 2210.

[0196] In an embodiment, the matching end 2216 is used to connect with the second connecting part 222, and the first connecting part 221 and the second connecting part 222 have a smooth connecting structure 22. The second connecting part 222 is arranged protruding along the third direction Z towards the inside of the frame 21, and the protruding second connecting part 222 can be used for connecting and coordinating between the gantry 20 and the 3D printing device.

[0197] In the embodiment, the second connecting part 222 includes a first positioning part 2221 used for connecting with a driving structure (not shown in the figure) of a driving base assembly, and a second positioning part 2222 used for connecting with a driving motor (not shown in the figure). The first positioning part 2221 and the second positioning part 2222 can be made by an integral molding process, and have high assembly precision. The first positioning part 2221 can be used for connecting with and positioning the driving structure of the driving base, and the second positioning part 2222 can be used for connecting with and positioning the driving motor, that is, the gantry 20 can serve as a mounting and positioning reference of the 3D printing device.

[0198] It can be understood that the gantry 20 of the present application has a frame 21 which is integrally formed and has a supporting and connecting function, and has a connecting structure 22 which is integrally formed and has a guiding function, and the connecting structure 22 and the frame 21 are also integrally formed. In the subsequent assembly process, it is not necessary to assemble them again, which greatly improves the assembly precision, and further improves the printing precision of the D and reduces the installation difficulty.

[0199] Further in combination with FIG. 34, the embodiment of the present application further provides a 3D printing device 2, which includes a base assembly 28, a nozzle assembly 29, and the gantry 20 of any one of the preceding embodiments.

[0200] As shown in FIGS. 35 to 38, the embodiment of the present application provides a gantry 30 applied to a 3D printing device 3, which includes a frame 31 and a connecting structure. The frame 31 is used to provide support for the gantry 30, and the connecting structure is connected to the frame 31. The connecting structure is provided with a first assembly cavity 3210, and the first assembly cavity 3210 is used to accommodate a transmission member 353 of the 3D printing device 3.

[0201] It can be understood that the gantry 30 has a frame 31 which can provide support, and the connecting structure is placed in a suitable position by being connected to the frame 31. The first assembly cavity 3210 is arranged in the connecting structure, and the first assembly cavity 3210 can accommodate the transmission member 353 of the 3D printing device 3, provide shielding and protection for the transmission member 353, improve the appearance of the product, and reduce the probability of failure due to external factors.

[0202] In the embodiment, the transmission member 353 is shown as a rod-shaped transmission shaft, and in other embodiments, the transmission member 353 can also be a belt-shaped transmission belt or a transmission gear or other transmission structure. Those skilled in the art can understand that the gantry 30 of the present application accommodates the transmission member 353 through the first assembly cavity 3210, and the specific transmission structure of the transmission member 353 is not limited.

[0203] For ease of understanding, the first direction X, the second direction Y, and the third direction Z are introduced in the embodiments of the present application for description, the first direction X, the second direction Y, and the third direction Z are three mutually non-parallel directions in a spatial coordinate system; in subsequent embodiments, the first direction X, the second direction Y, and the third direction Z are taken as three mutually perpendicular reference directions in a three-dimensional Cartesian coordinate system for example, the directions shown in the embodiments of the present application are used to help understand the mutual positional relationship of the parts, but the specific directions are not limited.

[0204] In an embodiment, the gantry 30 mounted on the 3D printing device 3 generally needs to be able to stand upright so that it can cooperate with other components to realize the driving function in at least two directions. The gantry 30 structure of the present application has a ring-shaped frame 31, which has good self-supporting property and relatively stable center of gravity position, facilitating handling and placement and also meeting the needs of cooperation with other components.

[0205] In an embodiment, the frame 31 includes a bottom edge 312, a top edge 313, and two side edges 311. The bottom edge 312, one side edge 311, the top edge 313, and the other side edge 311 are sequentially connected in a ring structure, and the connecting structure is arranged on the inner side of the ring structure and connected with the bottom edge 312 and the two side edges 311.

[0206] In the embodiment, the two side edges 311 are arranged in the first direction X, the bottom edge 312 and the top edge 313 are arranged in the third direction Z, the two side edges 311 are both arranged in the third direction Z in a long strip shape, and the bottom edge 312 and the top edge 313 are both arranged in the first direction X in a strip shape. The width direction of the bottom edge 312, the top edge 313, and the two side edges 311 corresponds to the second direction Y, and the projection of the bottom edge 312, the top edge 313, and the two side edges 311 in the second direction Y is a rectangle with a circular chamfer (i.e., a ring structure). It can be understood that the ring structure does not refer to a circular or elliptical shape, but refers to a structure with a continuous and complete boundary and in a hollow shape.

[0207] In an embodiment, the side edge 311 is connected with the connecting structure, and the top edge 313 is arranged in the connecting structure. The side edge 311 and the top edge 313 are configured to have the same thickness.

[0208] In the embodiment, the bottom edge 312, the top edge 313 and the two side edges 311 have substantially the same thickness, and the bottom edge 312, the top edge 313 and the two side edges 311 are connected to form a ring-shaped structure with uniform thickness. It can be understood that the gantry 30 is formed by the frame 31 and a connecting structure for accommodating the transmission member 353, and the frame 31 can be configured to have a relatively thin thickness, so that the gantry 30 can have a relatively light mass and a relatively small volume.

[0209] In an embodiment, the frame 31 further comprises a matching accommodation part 314 which is integrally arranged with the frame 31 or detachably connected.

[0210] In the embodiment, the matching accommodation part 314 is arranged outside the ring-shaped structure and connected with the bottom edge 312 and the two side edges 311. The matching accommodation part 314 is located outside the side edge 311 and the bottom edge 312, and is arranged at the junction of the bottom edge 312 and the side edge 311. The matching accommodation part 314 is used to support the frame 31.

[0211] It can be understood that the number of matching accommodation parts 314 can be two, and the two matching accommodation parts 314 are respectively located on the two sides of the frame 31. The frame 31 is substantially a triangular structure with a circular arc long side. The right angle of the matching accommodation part 314 is used to contact the bearing surface, which can improve the stability of the gantry 30 structure.

[0212] In an embodiment, the connecting structure is integrally arranged with the frame 31 or detachably connected, and is used to provide an accommodation space so that other components in the 3D printing device 3 can be installed in a hidden manner. It can be understood that the frame 31 and the connecting structure can be integrally formed or detachably connected. The integrally formed frame 31 and the connecting structure have good connection effect and will not fall apart and deform. During transportation and cooperation with other components for installation, the frame 31 and the connecting structure will not deform or misalign, and are also very convenient to place, greatly reducing the installation difficulty and greatly improving the precision. The detachable frame 31 and the connecting structure can better expose the first assembly cavity 3210, facilitating the installation of the transmission member 353.

[0213] In an embodiment, the connecting structure comprises two first connecting parts 321 and a second connecting part 322. The two first connecting parts 321 are respectively arranged at the two side edges 311 of the frame 31, and the second connecting part 322 is arranged at the bottom edge 312 of the frame 31. The two first connecting parts 321 are respectively connected with the second connecting part 322. At least one of the two first connecting parts 321 is integrally arranged with the corresponding side edge 311, and / or the second connecting part 322 is integrally arranged with the bottom edge 312.

[0214] In other embodiments, the number of the first connecting portions 321 can be only one, and the one first connecting portion 321 is arranged on any side edge 311 and connected with the second connecting portion 322 arranged on the bottom edge 312.

[0215] In the present embodiment, the first connecting portion 321 and / or the second connecting portion 322 can have an integrated or detachable connection relationship with the corresponding connecting structure on the frame 31.

[0216] As understood by those skilled in the art, the arrangement positions of the first connecting portion 321 and the second connecting portion 322 relative to the frame 31 can be changed; in addition, the first connecting portion 321 and the second connecting portion 322 are preferably configured to be communicatively arranged to accommodate the Z-axis driving assembly 35 in the connecting structure.

[0217] In an embodiment, the frame 31 and the connecting structure are arranged side by side along the second direction Y, and the connecting structure is protrudingly arranged on the middle region of the frame 31 along the second direction Y.

[0218] In the present embodiment, the side edge 311 and the first connecting portion 321 are arranged side by side along the second direction Y, and the side edge 311 and the first connecting portion 321 are arranged in a stack along the first direction X. The width of the first connecting portion 321 along the second direction Y is smaller than the width of the side edge 311 along the second direction Y, so that the first connecting portion 321 can be protrudingly arranged on the middle region of the side edge 311.

[0219] In an embodiment, the frame 31 is provided with a first through slot 316, and the first through slot 316 is in communication with the first assembly cavity 3210 for exposing the first assembly cavity 3210.

[0220] In the present embodiment, the first connecting portion 321 is connected to the side edge 311, and the first through slot 316 is correspondingly arranged on the side edge 311. The first through slot 316 is arranged through the side edge 311 along the first direction X to expose the first assembly cavity 3210.

[0221] As can be understood, the first assembly cavity 3210 is used to accommodate the transmission member 353, and the transmission member 353 can cooperate with a transmission structure (not shown in the figure) such as a sleeve to realize its transmission function. The transmission member 353 and the transmission structure can be exposed through the first through slot 316 for assembly and maintenance.

[0222] In the present embodiment, the transmission member 353 is correspondingly arranged to extend along the third direction Z along its length direction, and the first assembly cavity 3210 is also correspondingly arranged to extend along the third direction Z along its length direction to maximize the exposure of the transmission member 353. In the present embodiment, the first assembly cavity 3210 is recessed or formed on the side edge 311 along the first direction X, which can reduce the weight of the side edge 311 and further expose the transmission member 353.

[0223] In an embodiment, the first connecting portion 321 is provided with a first opening 3211 and a second opening 3212 which are spaced apart along the first direction X and which respectively communicate with the first assembly cavity 3210. The first through slot 316 communicates with the first assembly cavity 3210 through the first opening 3211, and the projection of the first through slot 316 along the first direction X is greater than the projection of the first opening 3211 along the second direction Y.

[0224] In the present embodiment, the first opening 3211 and the second opening 3212 are both arranged with their length directions extending along the third direction Z, the first opening 3211 is used to expose the first assembly cavity 3210 towards one side of the corresponding side edge 311, and the second opening 3212 is used to expose the first assembly cavity 3210 away from one side of the corresponding side edge 311.

[0225] It can be understood that the projection of the first through slot 316 along the first direction X is greater than the projection of the first opening 3211 along the second direction Y, that is, the area of the first through slot 316 in the projection direction is greater than the area of the first opening 3211 in the projection direction, so that the cover plate 33 arranged at the first through slot 316 can completely cover the first opening 3211, thereby improving the aesthetics.

[0226] In the present embodiment, the two second openings 3212 of the two first connecting portions 321 arranged on the two side edges 311 are oppositely spaced apart, and the two ends of the X-axis driving assembly 36 of the 3D printing device 3 can be connected with the two transmission members 353 through the two second openings 3212, respectively. The X-axis driving assembly 36 is configured to be connected with the nozzle 39, and the transmission member 353 drives the nozzle 39 to move in the Z-axis direction through the X-axis driving assembly 36.

[0227] In an embodiment, the gantry 30 further comprises a cover plate 33 which is detachably arranged in the first through slot 316 and used to shield the first assembly cavity 3210.

[0228] It can be understood that the cover plate 33 has a shape substantially matching the first through slot 316, and when the cover plate 33 is arranged in the first through slot 316, the cover plate 33 can cover the first opening 3211 to shield the first assembly cavity 3210 and the transmission member 353 located therein. At the same time, the cover plate 33 can also be exactly accommodated in the first through slot 316, so that the combined structure of the cover plate 33 and the frame 31 is more aesthetically pleasing. The number of cover plates 33 can be two, which are respectively matched with the two first through slots 316.

[0229] In the embodiment, when the cover plate 33 is arranged in the first through slot 316, the length direction of the cover plate 33 substantially corresponds to the third direction Z, and the cover plate 33 comprises a first surface 331 and a second surface 332 opposite to each other along the first direction X. The first surface 331 corresponds to an outer surface of the cover plate 33, and the first surface 331 is substantially flat and continuous and matches the outer surface of the frame 31, so that the combination of the cover plate 33 and the frame 31 is more beautiful. The second surface 332 corresponds to an inner surface of the cover plate 33, and the second surface 332 is configured to be arranged towards the first assembly cavity 3210; the second surface 332 comprises a first region 3321 and a second region 3322, and the second region 3322 is arranged outside (for example, on both sides or around) the first region 3321; the first region 3321 is arranged corresponding to the first opening 3211 and has an arc-shaped concave profiling structure for matching the outer surface of the transmission member 353, and the second region 3322 is arranged corresponding to the part of the exposed surface of the first through slot 316 of the connecting structure and has a substantially flat and continuous surface for matching the connection of the cover plate 33, the frame 31 and the first connecting part 321.

[0230] In an embodiment, the cover plate 33 is provided with a first connecting structure 341, and the connecting structure is provided with a second connecting structure 342, and the first connecting structure 341 and the second connecting structure 342 are configured to be detachably matched.

[0231] In an embodiment, the first connecting structure 341 is connected with the cover plate 33 and extends towards the side where the connecting structure is located along the first direction X; the second connecting structure 342 is recessed along the second direction Y by the inner wall of the connecting structure surrounding the first assembly cavity 3210; and the first connecting structure 341 and the second connecting structure 342 are detachably abutted and clamped.

[0232] In the embodiment, the first connecting structure 341 is arranged on the second surface 332 of the cover plate 33, and the first connecting structure 341 can comprise a plurality of different or not completely same structures, such as a first sub-connection piece 3411, a second sub-connection piece 3412 and a third sub-connection piece 3413. The first sub-connection piece 3411 and the third sub-connection piece 3413 are arranged at opposite ends of the cover plate 33 along the third direction Z, and a plurality of second sub-connection pieces 3412 are arranged between the first sub-connection piece 3411 and the third sub-connection piece 3413 along the third direction Z. The first sub-connection piece 3411 and the third sub-connection piece 3413 are arranged in the first region 3321, and the plurality of second sub-connection pieces 3412 are arranged in the second region 3322.

[0233] In the embodiment, the first sub-connection member 3411 includes two elastic arms close to each other and having hooks at the top ends, and the two elastic arms are arranged on the first area 3321, and the hooks of the two elastic arms are arranged opposite to each other along the second direction Y. The second sub-connection member 3412 includes two elastic arms spaced from each other and having arc-shaped bosses at the top ends, and the two elastic arms are arranged on the second areas 3322 on the two sides of the first area 3321, and the hooks of the two elastic arms are arranged opposite to each other along the second direction Y. The third sub-connection member 3413 includes a columnar boss arranged on the first area 3321.

[0234] In the embodiment, the second connection structure 342 can include a plurality of different or not completely same structures for adapting to different first connection structures 341. The second connection structure 342 for connecting with the first sub-connection member 3411 and the second sub-connection member 3412 can be a groove with an inclined guide slope, the elastic arms are pressed by the inner wall of the second connection structure 342 to deform and generate elastic force to realize abutting, and the hooks and / or the bosses can be used to improve the connection strength of the first connection structure 341 and the second connection structure 342. The second connection structure 342 for connecting with the third sub-connection member 3413 can be a hole slot for cooperating with the boss.

[0235] In the embodiment, the second connection structure 342 is recessed along the second direction Y by the inner wall of the connection structure surrounding the first assembly cavity 3210, and the first connection structure 341 can extend into the first assembly cavity 3210 along the first direction X and abut against the second connection structure 342 along the second direction Y.

[0236] Further combined with FIGS. 39 and 40, in an embodiment, the matching accommodation part 314 is provided with a matching accommodation cavity 3140; the first connection part 321 is provided with a first assembly cavity 3210, and the first assembly cavity 3210 communicates with the matching accommodation cavity 3140; and the second connection part 322 is provided with a second assembly cavity 3220, and the second assembly cavity 3220 communicates with the matching accommodation cavity 3140.

[0237] In the embodiment, the gantry 30 is provided with a second through groove 317 extending along the third direction Z to communicate the first assembly cavity 3210 with the matching accommodation cavity 3140, so as to enable the transmission member 353 to extend along the third direction Z.

[0238] It can be understood that the first assembly cavity 3210, the second assembly cavity 3220 and the matching accommodation cavity 3140 can cooperate with each other to accommodate the Z-axis driving assembly 35 of the 3D printing equipment 3, so that the appearance is more beautiful, and the protection effect can be achieved.

[0239] In an embodiment, the Z-axis driving assembly 35 comprises a driving part 351, a transmission wheel set 352, and a transmission member 353. The driving part 351 is configured to output a rotating torque; the transmission wheel set 352 comprises a driving wheel 3521 and a driven wheel 3522, the driving wheel 3521 is in transmission connection with the driving part 351, and the driving wheel 3521 and the driven wheel 3522 are in transmission connection through a transmission belt 3524; the transmission member 353 is in transmission connection with the driven wheel 3522, and the transmission member 353 is configured to be in transmission connection with the X-axis driving assembly 36, and the X-axis driving assembly 36 can be driven to drive the nozzle 39 to move along the third direction Z by rotating the transmission member 353. The driving part 351 is connected with the second connecting part 322, and the transmission member 353 of the driving part 351 extends into the second assembly cavity 3220; the transmission wheel set 352 is arranged in the second assembly cavity 3220, and the transmission member 353 extends from the matching accommodation cavity 3140 to the first assembly cavity 3210.

[0240] In the embodiment, the Z-axis driving assembly 35 comprises two transmission members 353, and the two transmission members 353 are arranged on two sides of the driving part 351 along the first direction X. The transmission wheel set 352 comprises one driving wheel 3521, two driven wheels 3522, and two tensioning wheels 3523. The two driven wheels 3522 are respectively in transmission connection with one transmission member 353, one tensioning wheel 3523 is located between the driving wheel 3521 and one driven wheel 3522 along the first direction X, and the other tensioning wheel 3523 is located between the driving wheel 3521 and the other driven wheel 3522 along the first direction X. The transmission belt 3524 extends from the driving wheel 3521 to one tensioning wheel 3523, further extends to one driven wheel 3522, further extends to the other driven wheel 3522, further extends to the tensioning wheel 3523, and then extends to the driving wheel 3521 to complete a closed loop. The driving part 351 drives the driving wheel 3521 to rotate, the driving wheel 3521 drives the transmission belt 3524 to rotate, the transmission belt 3524 drives the two driven wheels 3522 to rotate synchronously, and the two driven wheels 3522 respectively drive the two transmission members 353 to rotate.

[0241] It can be understood that the driving wheel 3521, the driven wheel 3522, and the tensioning wheel 3523 are accommodated in the second assembly cavity 3220, and the transmission member 353 is accommodated in the matching accommodation cavity and the first assembly cavity 3210, so as to realize the transmission cooperation with the driving part 351 and the transmission member 353, realize the hiding of the transmission wheel set 352, improve the space utilization rate, and make the product more beautiful.

[0242] Further in combination with FIG. 41, the embodiment of the present application further provides a 3D printing device 3 comprising the Z-axis driving assembly 35 and the gantry 30 according to any one of the foregoing embodiments, the Z-axis driving assembly 35 comprises a driving part 351, a transmission part, and a transmission member 353 in driving connection; at least part of the transmission member 353 is accommodated in the first assembly cavity 3210.

[0243] It can be understood that the 3D printing device 3 provided by the embodiment of the present application sets the transmission member 353 of the Z-axis driving assembly 35 in the first assembly cavity 3210, and meets the installation requirement of the Z-axis driving assembly 35 and the aesthetic requirement of the product by setting the gantry 30.

[0244] In an embodiment, the X-axis driving assembly 36 is drivingly connected with the nozzle 39, and is used to drive the nozzle 39 to move along the first direction X. The X-axis driving assembly 36 can include a guide rail 361 and a sliding structure 362. The guide rail 361 extends along the first direction X and is arranged between the two first connecting portions 321. The guide rail 361 is provided with a sliding structure 362 at each end thereof along the first direction X. The sliding structure 362 is slidingly matched with the guide structure 3213 on the first connecting portion 321, and can be drivingly connected with the transmission member 353 through the second opening 3212.

[0245] As can be understood by those skilled in the art, the sliding structure 362 can be drivingly connected with the transmission member 353 through a sliding ring (not shown in the figure). The sliding ring is sleeved outside the transmission member 353, and the sliding ring and the transmission member 353 can be drivingly connected through, for example, threads, so as to drive the guide rail 361 and the nozzle 39 to move along the third direction Z through the sliding structure 362. The specific structure is not described in detail. The outer side of the first connecting portion 321 away from the first assembly cavity 3210 is provided with a guide structure 3213, and the guide structure 3213 is arranged in a spaced manner with the first assembly cavity 3210. The guide structure 3213 can be a groove-shaped structure arranged in a recessed manner along the second direction Y, and the guide structure 3213 is used to accommodate a guide shaft 363. The guide structure 3213 and the first assembly cavity 3210 are arranged in an extending manner along the same direction. The guide structure 3213 and the guide shaft 363 can be matched with each other to realize the sliding of the sliding structure 362 along the first direction X, and the specific structure is not described in detail.

[0246] In the foregoing, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and replacements are within the scope defined by the present application.

Claims

1. A 3D printing apparatus comprising a nozzle assembly and a build platform, characterized in that, The 3D printing device further comprises: a gantry comprising a frame, a connecting structure and a positioning structure which are integrally formed or detachably arranged; a first driving assembly mounted on the connecting structure, the first driving assembly being configured to drive the nozzle assembly; a second driving assembly mounted on the positioning structure, the second driving assembly being configured to drive the forming platform.

2. The 3D printing device of claim 1, wherein, The connecting structure comprises: a first connecting portion arranged on a side edge of the frame, the first connecting portion being configured to guide the nozzle assembly; a second connecting portion arranged on a bottom edge of the frame, the second connecting portion being configured to mount the first driving assembly.

3. The 3D printing device of claim 2, wherein, The first driving assembly comprises: a driving portion configured to output a rotational torque; a transmission wheel set comprising a driving wheel and a driven wheel, the driving wheel being in transmission connection with the driving portion, and the driving wheel and the driven wheel being in transmission connection through a transmission belt; a transmission shaft in transmission connection with the driven wheel; wherein the driving portion and the transmission wheel set are connected to the second connecting portion, and the transmission shaft is configured to drive the nozzle assembly to move along the first connecting portion.

4. The 3D printing device of claim 3, wherein, The first connecting portion is provided with a first assembly cavity, and at least part of the transmission shaft is accommodated in the first assembly cavity.

5. The 3D printing device of claim 4, wherein, The second connecting portion is provided with a second assembly cavity, and the transmission wheel set is arranged in the second assembly cavity; the transmission shaft extends from the second assembly cavity to the first assembly cavity; or the frame is provided with a second assembly opening, the first connecting portion is provided with a first assembly opening, the second assembly opening and the first assembly opening are located on two sides of the first assembly cavity along a first direction and are in communication with the first assembly cavity respectively, and the second assembly opening and the first assembly opening are configured to expose the transmission shaft.

6. The 3D printing device of claim 3, wherein, The first driving assembly comprises two transmission shafts, and the two transmission shafts are arranged on two sides of the driving portion opposite to each other along the first direction; the transmission wheel set comprises one driving wheel, two driven wheels and two tensioning wheels, the two driven wheels are respectively in transmission connection with one transmission shaft, one tensioning wheel is located between the driving wheel and one driven wheel along the first direction, and the other tensioning wheel is located between the driving wheel and the other driven wheel along the first direction, and the tensioning wheels are configured to tension the transmission belt.

7. The 3D printing device of claim 2, wherein, The first connecting portion is provided with a recessed and / or protruding guide structure along a second direction, the guide structure being configured to guide the movement of the nozzle assembly along a third direction, and the second direction intersects the third direction.

8. The 3D printing device of claim 1, wherein, The second driving assembly comprises: a guide portion in fixed connection with the positioning structure; a first driving transmission structure connected with the guide portion and the forming platform respectively, and configured to drive the forming platform to move relative to the guide portion.

9. The 3D printing device of claim 8, wherein, The positioning structure comprises a positioning base plate in fixed connection with the frame, and the guide portion is arranged on the surface of the positioning base plate and is in locking connection with the positioning base plate, so as to position the second driving assembly.

10. The 3D printing device of claim 1, wherein, The 3D printing device further comprises: A third driving assembly is drivingly connected with the nozzle assembly and used to drive the nozzle assembly to move in a first direction, the third driving assembly is drivingly connected with the first driving assembly and movably connected with the connecting structure to drive the nozzle assembly to move in a third direction; A base assembly is connected with the gantry through the second driving assembly.

11. A gantry for use in a 3D printing apparatus, the gantry comprising: The gantry comprises: A frame which is an integrally formed annular structure; A connecting structure which is connected with the frame and integrally formed, the connecting structure is formed with a guide structure on the outer side or the inner side of the connecting structure.

12. The gantry of claim 11 wherein, The frame comprises different side edges which are spaced apart along a first direction, the connecting structure comprises a first connecting part, and the different side edges are respectively provided with the first connecting part, and the first connecting part is formed with the guide structure.

13. The gantry of claim 12 wherein, The first connecting part provided on the different side edges is protruded towards the inner side of the frame along the first direction, or the first connecting part provided on the different side edges is protruded towards the outer side of the frame along the first direction; or the first connecting part provided on one side edge is protruded towards the inner side of the frame along the first direction, and the first connecting part provided on another side edge is protruded towards the outer side of the frame along the first direction; or the first connecting part is arranged through the side edge along the first direction.

14. The gantry of claim 11 wherein, The frame comprises side edges which are spaced apart along a first direction, and the connecting structure is arranged on the side edges, and the guide structure is formed by the connecting structure being recessed and / or protruded along a second direction intersecting the first direction.

15. The gantry of claim 14 wherein, The connecting structure is provided with the guide structure on two outer surfaces opposite to each other along the second direction, and the guide structure is formed by being recessed towards the inner side of the connecting structure and / or protruded towards the outer side of the connecting structure along the second direction; or the connecting structure is provided with the guide structure on two inner surfaces spaced apart along the second direction, and the guide structure is formed by being recessed towards the outer side of the connecting structure and / or protruded towards the inner side of the connecting structure along the second direction.

16. The gantry of claim 11 wherein, The frame comprises two side edges which are spaced apart along a first direction, and the frame further comprises a bottom edge and a top edge which are spaced apart along a third direction, and the top edge, one side edge, the bottom edge and another side edge are sequentially connected to form the frame; the frame further comprises a support part which is located at the outer side of the side edge and the bottom edge, and the bottom edge, the side edge, the support part and the two side edges are integrally formed, and the support part is used to support the frame.

17. A gantry for use in a 3D printing apparatus, the gantry comprising: The gantry comprises: A frame which is used to provide support for the gantry; A connecting structure which is connected with the frame, and the connecting structure is provided with a first assembly cavity, and the first assembly cavity is used to accommodate a transmission part of the 3D printing device; The frame is provided with a first through slot, and the first through slot is in communication with the first assembly cavity.

18. The gantry of claim 17 wherein, The gantry further comprises a cover plate, the cover plate is provided with a first connecting structure, the connecting structure is provided with a second connecting structure, and the first connecting structure and the second connecting structure are configured to be detachably matched.

19. The gantry of claim 17 wherein, The frame comprises connected side edges and a top edge, the side edges are connected with the connecting structure, the top edge is arranged in a spaced manner with the connecting structure, and the side edges and the top edge are configured to have the same thickness; or the frame and the connecting structure are arranged side by side along a second direction, and the connecting structure is convexly arranged on the middle region of the frame along the second direction.

20. The gantry of claim 17 wherein, The connecting structure comprises: two first connecting parts, respectively arranged on the two side edges of the frame; a second connecting part arranged on the bottom edge of the frame; wherein at least one of the two first connecting parts is integrally arranged with the corresponding side edge, and / or the second connecting part is integrally arranged with the bottom edge.

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