3D printing equipment

Abstract

The embodiment of the invention provides 3D printing equipment which comprises a nozzle assembly and a forming platform and further comprises a portal frame, a first driving assembly and a second driving assembly. The portal frame comprises a frame, a connecting structure and a positioning structure which are integrally formed or detachably arranged, and the frame is used for supporting the portal frame; the first driving assembly is mounted on the connecting structure, and the first driving assembly is used for driving the nozzle assembly; the second driving assembly is installed on the positioning structure and used for driving the forming platform.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a 3D printing device. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses digital model files as the basis, special wax materials, powdered metals or plastics and other bondable materials to print layers of materials to create three-dimensional objects. Fused deposition modeling technology is one of the main 3D printing technologies. This technology heats and melts the hot-melt filament, squeezes it out from the nozzle, and deposits it on the molding platform or the previous layer of solidified material to finally generate a physical object.

[0003] Fused deposition modeling 3D printing technology usually requires a driving component to drive the nozzle component to move to complete printing. The movement accuracy is directly related to the printing accuracy. The overall installation accuracy of the 3D printing equipment will have a direct impact on the printing accuracy. Moreover, 3D printing is gradually becoming popular in the personal user market. How to reduce the installation difficulty of 3D printing equipment and improve the installation accuracy and printing accuracy of 3D printing equipment is what technicians in this field need to consider. Summary of the invention

[0004] In order to solve the problems in the prior art, the embodiments of the present application provide a 3D printing device with lower installation difficulty and higher installation accuracy and printing accuracy.

[0005] The embodiment of the present application provides a 3D printing device, which includes a nozzle assembly and a molding platform, and the 3D printing device also includes:

[0006] A gantry, comprising an integrally formed or detachably arranged frame, a connecting structure and a positioning structure, wherein the frame is used to support the gantry;

[0007] A first driving assembly, which is mounted on the connecting structure, and the first driving assembly is used to drive the nozzle assembly;

[0008] A second driving component is installed on the positioning structure, and the second driving component is used to drive the forming platform.

[0009] In one embodiment, the connection structure includes:

[0010] A first connection portion, which is disposed on a side of the frame, and the first connection portion is used to guide the nozzle assembly;

[0011] The second connecting portion is arranged at the bottom edge of the frame, and the second connecting portion is used for installing the first driving component.

[0012] In one embodiment, the first driving component includes:

[0013] A driving unit for outputting a rotational torque;

[0014] A transmission wheel group, comprising a driving wheel and a driven wheel, wherein the driving wheel is in transmission connection with the driving part, and the driving wheel and the driven wheel are in transmission connection with each other through a transmission belt;

[0015] A transmission shaft, which is drivingly connected to the driven wheel;

[0016] Wherein, the driving part and the transmission wheel group are connected to the second connection part, and the transmission shaft is used to drive the nozzle assembly to move along the first connection part.

[0017] In one embodiment, the first connecting portion defines a first assembly cavity, and at least a portion of the transmission shaft is received in the first assembly cavity.

[0018] In one embodiment, the second connection portion defines a second assembly cavity, the transmission wheel assembly is disposed in the second assembly cavity; and the transmission shaft extends from the second assembly cavity to the first assembly cavity.

[0019] In one embodiment, 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 both sides of the first assembly cavity along a first direction and are respectively connected to the first assembly cavity, and the second assembly opening and the first assembly opening are used to expose the transmission shaft.

[0020] In one embodiment, the first driving assembly includes two transmission shafts, and the two transmission shafts are arranged on opposite sides of the driving part along the first direction; the transmission wheel group includes one driving wheel, two driven wheels and two tensioning wheels, and the two driven wheels are respectively connected to one transmission shaft in transmission, 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 wheel is used to tension the transmission belt.

[0021] In one embodiment, the first connection portion is provided with a recessed and / or raised guiding structure along the second direction, and the guiding structure is used to guide the movement of the nozzle assembly along a third direction, and the second direction intersects with the third direction.

[0022] In one embodiment, the second driving component includes:

[0023] A guide portion, which is fixedly connected to the positioning structure;

[0024] The first driving transmission structure is connected to the guide portion and the molding platform respectively, and is used to drive the molding platform to move relative to the guide portion.

[0025] In one embodiment, the positioning structure includes a positioning base plate, the positioning base plate is fixedly connected to the frame, and the guide portion is disposed on the surface of the positioning base plate and is locked and connected to the positioning base plate for positioning the second driving assembly.

[0026] In one embodiment, the 3D printing device further includes:

[0027] A third driving assembly is drivingly connected to the nozzle assembly and used to drive the nozzle assembly to move along the first direction. The third driving assembly is drivingly connected to the first driving assembly and is movably connected to the connecting structure to drive the nozzle assembly to move along the third direction.

[0028] A base assembly is connected to the gantry through the second driving assembly.

[0029] It can be understood that the gantry of the 3D printing device includes an integrally formed or detachably arranged frame, a connecting structure and a positioning structure, which facilitates the installation and placement of the gantry itself and ensures the installation accuracy of the gantry structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a three-dimensional schematic diagram of a 3D printing device provided in an embodiment of the present application at one angle.

[0031] Figure 2 This is a three-dimensional schematic diagram from another angle of the 3D printing device provided in an embodiment of the present application.

[0032] Figure 3 A three-dimensional schematic diagram of a gantry of a 3D printing device provided in an embodiment of the present application at one angle.

[0033] Figure 4 A three-dimensional schematic diagram of the gantry of the 3D printing device provided in an embodiment of the present application from another angle.

[0034] Figure 5 for Figure 4 Schematic diagram of the cross-sectional view along the VV direction.

[0035] Figure 6 A partial schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0036] Figure 7 A partial schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0037] Figure 8 for Figure 6Schematic diagram of the cross-sectional view along direction VIII-VIII.

[0038] Fig. 9 for Figure 6 Schematic diagram of the cross-sectional view along the IX-IX direction.

[0039] Fig.10 for Fig. 9 A local enlarged schematic diagram of the corresponding area X.

[0040] Fig.11 for Fig. 9 A local enlarged schematic diagram of the corresponding area XI.

[0041] Fig.12 A partial schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0042] Fig.13 for Fig.12 Schematic diagram of the cross-sectional view along the XIII-XIII direction.

[0043] Fig.14 A schematic structural diagram of the coordination between the frame and the connection structure of the gantry of a 3D printing device provided in one embodiment of the present application.

[0044] Fig.15 A schematic structural diagram of the coordination between the frame and the connection structure of the gantry of a 3D printing device provided in another embodiment of the present application.

[0045] Fig.16 A schematic structural diagram of the coordination between the frame and the connection structure of the gantry of a 3D printing device provided in yet another embodiment of the present application.

[0046] Fig.17 A schematic structural diagram of the coordination between the frame and the connection structure of the gantry of a 3D printing device provided in yet another embodiment of the present application.

[0047] Fig.18 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in one embodiment of the present application.

[0048] Fig.19 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in another embodiment of the present application.

[0049] Fig. 20 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in yet another embodiment of the present application.

[0050] Fig.21 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in yet another embodiment of the present application.

[0051] Fig. 22 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in another embodiment of the present application.

[0052] Fig.23 A schematic structural diagram of a guide structure of a connection structure of a gantry of a 3D printing device provided in another embodiment of the present application.

[0053] Main component symbols

[0054] 3D printing equipment1

[0055] Gantry 10

[0056] Framework 11

[0057] Side 111

[0058] Bottom 112

[0059] Top edge 113

[0060] Supporting portion 114

[0061] Matching cavity 1140

[0062] The third assembly opening 1141

[0063] Second assembly opening 117

[0064] Connection structure 12

[0065] The first connection portion 121

[0066] First assembly cavity 1210

[0067] Track bar 1211

[0068] First assembly opening 1212

[0069] Guide structure 1213

[0070] Assembly end 1215

[0071] Mating end 1216

[0072] The second connection portion 122

[0073] Second assembly cavity 1220

[0074] Connector 1222

[0075] Inner surface 128

[0076] Outer surface 129

[0077] Positioning structure 13

[0078] Positioning base plate 131

[0079] Positioning side plate 132

[0080] The first drive assembly 14

[0081] Driving unit 141

[0082] Transmission wheel set 142

[0083] Driving wheel 1421

[0084] Driven wheel 1422

[0085] Tensioner 1423

[0086] Transmission belt 1424 Drive shaft 143

[0087] The second drive assembly 15

[0088] Guide part 151

[0089] The first driving transmission structure 152

[0090] Connecting frame 153

[0091] The third drive assembly 16

[0092] Guide Rail 161

[0093] Sliding structure 162

[0094] Sliding connection block 1621

[0095] Pulley 1622

[0096] Guide shaft 1623

[0097] Sliding ring 163

[0098] The second driving transmission structure 164

[0099] Forming platform 17

[0100] Base assembly 18

[0101] Nozzle assembly 19

[0102] First direction X

[0103] Second direction Y

[0104] The third direction Z

[0105] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0106] The following description will refer to the accompanying drawings to more fully describe the content of the present application. The accompanying drawings show exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components. The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as those generally understood by ordinary technicians in the field to which the present application belongs. Furthermore, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the relevant art and the content of this application, and will not be interpreted as idealized or overly formal meanings.

[0107] Generally, the fused deposition modeling rapid prototyping 3D printing technology usually requires the driving component to drive the nozzle component to move to complete the printing. The movement accuracy is directly related to the printing accuracy. The overall installation accuracy of the 3D printing equipment will have a direct impact on the printing accuracy. Moreover, 3D printing is gradually popularizing in the personal user market. How to reduce the installation difficulty of 3D printing equipment and improve printing accuracy is what technicians in this field need to consider.

[0108] Correspondingly, an embodiment of the present application provides a 3D printing device, which includes a nozzle assembly and a molding platform, and the 3D printing device also includes a gantry, a first drive assembly and a second drive assembly. The gantry includes an integrally formed or detachably arranged frame, a connecting structure and a positioning structure, the frame is used to support the gantry; the first drive assembly is installed on the connecting structure, and the first drive assembly is used to drive the nozzle assembly; the second drive assembly is installed on the positioning structure, and the second drive assembly is used to drive the molding platform.

[0109] Furthermore, the gantry of the 3D printing device includes an integrally formed or detachably arranged frame, a connecting structure and a positioning structure, which facilitates the installation and placement of the gantry itself and ensures the installation accuracy of the gantry structure.

[0110] Those skilled in the art can understand that "3D printing" refers to a technology that uses a digital model file as the basis, and uses powdered metal or plastic and other bondable materials to construct objects by printing layer by layer.

[0111] The following will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0112] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0113] like Figure 1 and Figure 2 As shown, the embodiment of the present application provides a 3D printing device 1, which includes a nozzle assembly 19 and a molding platform 17. The 3D printing device 1 also includes a gantry 10, a first drive assembly 14 and a second drive assembly 15. The gantry 10 includes an integrally formed or detachably arranged frame 11, a connecting structure 12 and a positioning structure 13, the frame 11 is used to support the gantry 10; the first drive assembly 14 is installed on the connecting structure 12, and the first drive assembly 14 is used to drive the nozzle assembly 19; the second drive assembly 15 is installed on the positioning structure 13, and the second drive assembly 15 is used to drive the molding platform 17.

[0114] It can be understood that the gantry 10 of the 3D printing device 1 includes an integrally formed or detachably arranged frame 11, a connecting structure 12 and a positioning structure 13, which facilitates the installation and placement of the gantry 10 and ensures the installation accuracy of the gantry 10.

[0115] In one embodiment, the connection structure 12 and the positioning structure 13 are integrally formed with the frame 11, and there is no need to connect the connection structure 12 and the positioning structure 13 to the frame 11 by assembly, thereby avoiding errors caused by installation and ensuring that the relative positions between the connection structure 12 and the positioning structure 13 and the frame 11 are accurate, thereby ensuring printing accuracy and reducing installation difficulty. On this basis, the first drive assembly 14 is installed on the connection structure 12, which can improve the installation accuracy of the first drive assembly 14 and the accuracy of the first drive assembly 14 driving the nozzle assembly 19 to move, thereby ensuring printing accuracy; the second drive assembly 15 is installed on the positioning structure 13, which can improve the installation accuracy of the second drive assembly 15 and the accuracy of the second drive assembly 15 driving the molding platform 17 to move, thereby ensuring printing accuracy.

[0116] Specifically, the gantry 10 installed in the 3D printing device 1 usually needs to present a support structure in the shape of a ring or frame 11 and needs to be placed upright so that it can cooperate with other components in at least two directions to realize the driving function, but this structure and the corresponding placement method will cause the gantry 10 to have problems such as unstable center of gravity, easy shaking, and inconvenient installation. The gantry 10 of the present application has an integrally formed annular frame 11. The frame 11 has good self-supporting properties and a relatively stable center of gravity. It is easy to carry and place, and can also meet the needs of cooperating with other components; the integrally formed frame 11 makes each side of the annular structure have a good connection effect, and the annular frame 11 will not scatter and deform. On the one hand, the frame 11 will not be deformed or dislocated during transportation and installation with other components. On the other hand, the integrally formed frame 11 is also very easy to place, which greatly reduces the difficulty of installation and greatly improves the accuracy.

[0117] Furthermore, the connection structure 12 and the positioning structure 13 are integrally formed with the frame 11, especially the positioning structure 13 is integrally formed with the frame 11, and the positioning structure 13 and the frame 11 have a relatively stable relative position. During the installation process of the gantry 10 of the present application, the gantry 10 can be placed by the frame 11, the positioning structure 13 and the frame 11 are integrally formed and have a clear relative position, the second drive assembly 15 is connected to the positioning structure 13, and the molding platform 17 is connected to the second drive assembly 15, and the second drive assembly 15 and the molding platform 17 have a clear relative position.

[0118] At the same time, 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 accuracy. Furthermore, the guide rail 161 of the gantry 10 structure of the present application is integrally formed with the frame 11, and there is no need to consider the installation sequence and installation method of the frame 11 and the guide rail 161, which greatly reduces the difficulty of installation and avoids the occurrence of poor printing effects or even equipment damage due to installation errors.

[0119] In one embodiment, the connection structure 12 and the positioning structure 13 are configured to be detachably connected to the frame 11, and the connection structure 12 and the positioning structure 13 can be detachably connected to the frame 11 by means of snap connection, hinge connection, thread connection, etc. The connection structure 12 and the positioning structure 13 are respectively provided with connection limit structures (not shown) with the frame 11 to avoid installation errors as much as possible and ensure that the relative positions between the connection structure 12 and the positioning structure 13 and the frame 11 are accurate. At the same time, the detachable connection structure 12, the positioning structure 13 and the frame 11 can be disassembled and repackaged and arranged during transportation, etc., to avoid transportation difficulties caused by their large overall volume.

[0120] Specifically, the gantry 10 installed in the 3D printing device 1 usually needs to present a support structure in the shape of a ring or frame 11 and needs to be placed upright so that it can cooperate with other components in at least two directions to realize the driving function, but this structure and the corresponding placement method will cause the gantry 10 to have problems such as large volume and difficulty in transportation. The gantry 10 of the present application has a detachably connected frame 11, a connecting structure 12 and a positioning structure 13; during transportation and other processes, the gantry 10 can be disassembled into a frame 11, a connecting structure 12 and a positioning structure 13, which is convenient for rearrangement, 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 and installed as the gantry 10 again.

[0121] At the same time, the gantry 10 of the present application has an annular frame 11, and the connecting structure 12 and the positioning structure 13 can be respectively installed at corresponding positions of the annular frame 11. The annular frame 11 has good self-supporting performance and a relatively stable center of gravity, which is convenient for carrying and placing, and can also meet the needs of cooperating with other components.

[0122] For ease of understanding, the first direction X, the second direction Y and the third direction Z are introduced for description in the embodiments of the present application. The first direction X, the second direction Y and the third direction Z are three non-parallel directions in the spatial coordinate system; in subsequent embodiments, the first direction X, the second direction Y and the third direction Z are taken as examples of three mutually perpendicular reference directions in the three-dimensional Cartesian coordinate system for description. The directions shown in the embodiments of the present application are used to help understand the relative positional relationship of each component, but their specific directions are not limited.

[0123] Further integration Figures 3 to 6 As shown, in one embodiment, the frame 11 includes a support portion 114, a bottom edge 112, a top edge 113 and two side edges 111, and the bottom edge 112, one side edge 111, the top edge 113 and the other side edge 111 are sequentially connected end to end to form an annular 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 respectively connected to the two side edges 111. The connecting structure 12 is disposed on the inner side of the annular structure and connected to the bottom edge 112 and the two side edges 111, and the support portion 114 is disposed on the outer side of the annular structure and connected to the bottom edge 112 and the two side edges 111.

[0124] In this 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 arranged to extend in a long strip along the third direction Z, and the bottom edge 112 and the top edge 113 are arranged to extend in a strip 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 rounded chamfers (i.e., the annular structure). It can be understood that the annular structure does not refer to a quasi-circular or quasi-elliptical shape, but refers to a structure with a circle of continuous and complete boundaries and a hollow shape.

[0125] In one 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 outside the side edge 111 and the bottom edge 112, and is located at the junction of the bottom edge 112 and the side edge 111. The support portion 114 is used to support the frame 11.

[0126] In this embodiment, the annular structure formed by connecting the bottom edge 112, one side edge 111, the top edge 113 and the other side edge 111 end to end has a rounded chamfer, which can improve the safety and aesthetics of the frame 11. At the same time, the number of the support parts 114 can be two, and the two support parts 114 are respectively located on both sides of the frame 11. The frame 11 is roughly a triangular structure with a long side of an arc. The right angle of the support part 114 is used to contact the bearing surface. At the same time, the support part 114 has a certain width, which can improve the stability of the gantry 10 structure.

[0127] In one embodiment, the connection structure 12 includes a first connection portion 121 and a second connection portion 122. The first connection portion 121 is disposed on the side 111 of the frame 11 and is used to guide the nozzle assembly 19. The second connection portion 122 is disposed on the bottom 112 of the frame 11.

[0128] In this embodiment, an example is taken in which the first connection portion 121 is located on the inner side of the side edge 111 of the frame 11 and the second connection portion 122 is located on the inner side of the bottom edge 112 of the frame 11 .

[0129] like Figures 14 to 17 As mentioned above, in other embodiments, the positions of the first connection portion 121 and the second connection portion 122 relative to the frame 11 may also be in other ways.

[0130] like Fig.14As shown, in other embodiments, the first connection portion 121 is located on the outside of the side edge 111 of the frame 11, and the second connection portion 122 is located on the inside of the bottom edge 112 of the frame 11. The projection of the first connection portion 121 along the first direction X and the projection of the second connection portion 122 along the first direction X at least partially overlap, and the first connection portion 121 and the second connection portion 122 can be connected and arranged at the overlapping portion of the corresponding projections.

[0131] like Fig.15 As shown, in other embodiments, the first connection portion 121 is located outside the side 111 of the frame 11, and the second connection portion 122 is located outside the bottom 112 of the frame 11. The length of the second connection portion 122 along the first direction X is greater than the length of the bottom 112 along the first direction X, and the first connection portion 121 is extended along the third direction Z toward the side where the second connection portion 122 is located, so that the first connection portion 121 and the second connection portion 122 can be connected.

[0132] like Fig.16 As shown, in other embodiments, the first connection portion 121 is located on the inner side of the side edge 111 of the frame 11, and the second connection portion 122 is located on the outer side of the bottom edge 112 of the frame 11. The projection of the first connection portion 121 along the third direction Z and the projection of the second connection portion 122 along the third direction Z at least partially overlap, and the first connection portion 121 and the second connection portion 122 can be connected and arranged at the overlapping portion of the corresponding projections.

[0133] like Fig.17 As shown, in other embodiments, the first connection portion 121 can be arranged to pass through the side edge 111 along the first direction X, and / or the second connection portion 122 can be arranged to pass through the bottom edge 112 along the third direction Z, so that the first connection portion 121 and the second connection portion 122 can be connected at the connection point (or the point where the projections overlap).

[0134] Those skilled in the art can understand that the setting positions of the first connection part 121 and the second connection part 122 compared to the frame 11 can be changed, and the first connection part 121 and the second connection part 122 are preferably constructed to be connected, so as to accommodate the first drive component 14 in the connection structure 12 and ensure the transmission setting of the first drive component 14; the first connection part 121 and the second connection part 122 can also be constructed to be not connected, and the corresponding first drive component 14 can be constructed to be exposed outside the connection structure 12.

[0135] Further integration Figures 3 to 5As shown, in one embodiment, the first connection portion 121 includes an integrally formed track bar 1211, an assembly end 1215 and a mating end 1216, and the two sides of the track bar 1211 are respectively connected to the assembly end 1215 and the mating end 1216. The assembly end 1215 is located on the side of the first connection portion 121 close to the top edge 113, the mating end 1216 is located on the side of the first connection portion 121 close to the bottom edge 112, and the track bar 1211 is located between the assembly end 1215 and the mating end 1216. The second connection portion 122 extends along the first direction X and is arranged on the bottom edge 112, and the two first connection portions 121 are located on both sides of the second connection portion 122 along the first direction X and are respectively connected to the second connection portion 122.

[0136] In this embodiment, the connection structure 12 includes two first connection parts 121, and the two first connection parts 121 are respectively arranged on the two side edges 111. In other embodiments, the number of the first connection part 121 can also be only one, one connection part is arranged on the side edge 111, and connected to the second connection part 122 arranged on the bottom edge 112.

[0137] In one embodiment, the first connection portion 121 defines a first assembly cavity 1210 , and the first assembly cavity 1210 is used to receive at least a portion of the transmission shaft 143 of the first driving assembly 14 .

[0138] In one embodiment, the frame 11 is provided with a second assembly opening 117, and the first connection portion 121 is provided with a first assembly opening 1212. The second assembly opening 117 and the first assembly opening 1212 are located on both sides of the first assembly cavity 1210 along the first direction X and are respectively connected to the first assembly cavity 1210, and the second assembly opening 117 and the first assembly opening 1212 are used to expose the transmission shaft 143.

[0139] It can be understood that the first assembly cavity 1210 is used to accommodate the transmission shaft 143, and the first assembly cavity 1210 is extended along the third direction Z. On the other hand, the second assembly opening 117 exposes the interior of the first assembly cavity 1210, and the interior of the first assembly cavity 1210 and the transmission shaft 143 disposed therein can be observed through the second assembly opening 117, or other operations can be performed.

[0140] In one embodiment, the two first connection portions 121 are each provided with a first assembly opening 1212 along the first direction X, and the first assembly cavity 1210 is connected to the two first assembly openings 1212 ; the two side edges 111 are each provided with a second assembly opening 117 along the first direction X, and the first assembly cavity 1210 is connected to the two second assembly openings 117 .

[0141] In one embodiment, the first connection portion 121 includes two track bars 1211 spaced apart along the second direction Y, the first assembly cavity 1210 is located between the two track bars 1211 , and the first assembly opening 1212 is opened between the two track bars 1211 .

[0142] In one embodiment, each track bar 1211 is provided with a guide structure 1213 that is recessed along the second direction Y toward the side where the first assembly cavity 1210 is located, and the guide structure 1213 is spaced apart from the first assembly cavity 1210 .

[0143] It can be understood that the guide structure 1213 is used to accommodate the guide shaft 1623, and the guide structure 1213 and the first assembly cavity 1210 are extended in the same direction. Further, the guide structure 1213 is extended along the third direction Z.

[0144] Further integration Figures 18 to 23 As shown, in one embodiment, the first connecting portion 121 is provided with a recessed and / or raised guide structure 1213 along the second direction Y, and the guide structure 1213 is used to guide the movement of the nozzle assembly 19 along the third direction Z, and the second direction Y intersects with the third direction Z.

[0145] It can be understood that the guide structure 1213 can be used to guide the driving structure, and the driving structure includes but is not limited to an optical axis, a guide wheel with a convex surface, a guide wheel with a groove, etc. Correspondingly, the guide structure 1213 can be convex or concave to match the driving structure in different forms.

[0146] Further integration Fig.18 and Fig.19 As shown, in one embodiment, two outer surfaces 129 of the connection structure 12 opposite to each other along the second direction Y are respectively provided with guide structures 1213, and the guide structures 1213 are formed to be recessed toward the inner side of the connection structure 12 and / or protruded toward the outer side of the connection structure 12 along the second direction Y.

[0147] like Fig.18 As shown, in this embodiment, the guide structure 1213 located on the outer surface 129 is recessed along the second direction Y toward the inner side of the connecting structure 12 .

[0148] like Fig.19 As shown, in this embodiment, the guide structure 1213 located on the outer surface 129 is formed to protrude along the second direction Y toward the outer side of the connecting structure 12 .

[0149] Further integration Fig. 20 and Fig.23As shown, in one embodiment, the middle part of the first connection part 121 of the connection structure 12 has a depression and forms a space, and the two inner surfaces 128 of the first connection part 121 spaced apart along the second direction Y are respectively provided with guide structures 1213, and the guide structures 1213 are recessed toward the outer side of the connection structure 12 and / or convex toward the inner side of the connection structure 12 along the second direction Y.

[0150] like Fig. 20 As shown, the guide structure 1213 located on the inner surface 128 is recessed along the second direction Y toward the outer side of the connecting structure 12 .

[0151] like Fig.21 As shown, the guide structure 1213 located on the inner surface 128 is formed to protrude along the second direction Y toward the inner side of the connecting structure 12 .

[0152] like Fig. 22 As shown, in one embodiment, a guide structure 1213 is provided on one of the two inner surfaces 128 of the connecting structure 12 spaced apart along the second direction Y, and the corresponding guide structure 1213 is formed concave toward the outer side of the connecting structure 12 along the second direction Y; and, a guide structure 1213 is provided on one of the two outer surfaces 129 of the connecting structure 12 opposite to each other along the second direction Y, and the corresponding guide structure 1213 is formed convex toward the outer side of the connecting structure 12 along the second direction Y.

[0153] like Fig.23 As shown, in one embodiment, a guide structure 1213 is provided on one of the two inner surfaces 128 of the connecting structure 12 spaced apart along the second direction Y, and the corresponding guide structure 1213 is formed by protruding toward the inner side of the connecting structure 12 along the second direction Y; and a guide structure 1213 is provided on one of the two outer surfaces 129 of the connecting structure 12 opposite to each other along the second direction Y, and the corresponding guide structure 1213 is formed by being recessed toward the inner side of the connecting structure 12 along the second direction Y.

[0154] Further integration Figure 6 to Figure 7 As shown, in one embodiment, the first driving assembly 14 includes a driving portion 141, a transmission wheel group 142 and a transmission shaft 143. The driving portion 141 is connected to the connecting member 1222 of the second connecting portion 122, and the driving portion 141 is used to output a rotational torque. The transmission wheel group 142 includes a driving wheel 1421 and a driven wheel 1422, the driving wheel 1421 is transmission-connected to the driving portion 141, and the driving wheel 1421 and the driven wheel 1422 are transmission-connected through a transmission belt 1424. The transmission shaft 143 is transmission-connected to the driven wheel 1422. Among them, the driving portion 141 and the transmission wheel group 142 are connected to the second connecting portion 122, and the transmission shaft 143 is used to drive the nozzle assembly 19 to move along the first connecting portion 121.

[0155] In one embodiment, the second connection portion 122 defines a second assembly cavity 1220 for accommodating the transmission wheel assembly 142 of the first driving component 14 ; the transmission shaft 143 of the first driving component 14 can extend from the second assembly cavity 1220 to the first assembly cavity 1210 .

[0156] In this embodiment, the driving part 141 is connected to the connecting member 1222 of the second connecting part 122, and its transmission shaft 143 extends into the second assembly cavity 1220. The transmission wheel assembly 142 is disposed in the second assembly cavity 1220, and the transmission shaft 143 extends from the second assembly cavity 1220 to the first assembly cavity 1210.

[0157] In one embodiment, the first driving assembly 14 includes two transmission shafts 143, and the two transmission shafts 143 are arranged on opposite sides of the driving portion 141 along the first direction X. The transmission wheel group 142 includes a driving wheel 1421, two driven wheels 1422 and two tensioning wheels 1423, and the two driven wheels 1422 are respectively connected to a transmission shaft 143 in transmission, and one tensioning wheel 1423 is located between the driving wheel 1421 and one driven wheel 1422 along the first direction X, and the other tensioning wheel 1423 is located between the driving wheel 1421 and the other driven wheel 1422 along the first direction X, and the tensioning wheel 1423 is used to tension the transmission belt 1424.

[0158] In this embodiment, the driving part 141 is invertedly arranged on the connecting member 1222, and the connecting member 1222 extends from one side of the second connecting part 122. The second assembly cavity 1220 is also arranged corresponding to the connecting member 1222, so that the output shaft (not shown) of the driving part 141 passes through the bottom edge 112 along the third direction Z and extends into the second assembly cavity 1220. 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. Two driven wheels 1422 are arranged on opposite sides of the driving wheel 1421 along the first direction X, and are used for driving connection with the transmission shaft 143 located in the second assembly cavity 1220; two tensioning wheels 1423 are arranged on opposite sides of the driving wheel 1421 along the first direction X, and the tensioning wheels 1423 can be arranged to be rotatably connected with the bottom edge 112 or the second connecting part 122.

[0159] It can be understood that the driving wheel 1421, the two driven wheels 1422 and the two tensioning wheels 1423 can be constructed to be approximately located in the same horizontal plane; the tensioning wheel 1423 arranged between the driving wheel 1421 and the driven wheel 1422 is constructed to be deviated from the connecting line between the driving wheel 1421 and the driven wheel 1422, or it can be understood that the tensioning 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 to tension the transmission belt 1424.

[0160] In this embodiment, the transmission belt 1424 extends from the driving wheel 1421 to a tensioning wheel 1423, and further extends to a driven wheel 1422, and further extends to another driven wheel 1422, and further extends to the tensioning wheel 1423, and then extends to the driving wheel 1421 to complete the closed loop. The driving unit 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 respectively drive the two transmission shafts 143 to rotate.

[0161] It can be understood that the driving part 141 is arranged through the connecting piece 1222 on the second connecting part 122, and the second connecting part 122 is arranged on the gantry 10. The driving part 141 realizes its positioning with the gantry 10 by connecting with the connecting piece 1222. The driving wheel 1421, the driven wheel 1422 and the tensioning wheel 1423 are accommodated in the second assembly cavity 1220, which can realize the transmission coordination with the driving part 141 and the transmission shaft 143, and also hide the transmission wheel group 142, thereby improving the space utilization and making the product more beautiful. The transmission shaft 143 is arranged to extend roughly along the third direction Z, and the transmission shaft 143 is used for transmission connection with the third driving assembly 16, and the nozzle assembly 19 is driven to move along the third direction Z by rotating the third driving assembly 16.

[0162] Further integration Figure 6 , Figures 8 to 10 As shown, in one embodiment, the 3D printing device 1 also includes a third driving assembly 16, which is drivingly connected to 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 to the first driving assembly 14 and is movably connected to the connecting structure 12 to drive the nozzle assembly 19 to move along the third direction Z.

[0163] In this embodiment, the third drive component 16 is connected to the transmission shaft 143 in transmission connection, and the third drive component 16 is connected to the first connection part 121 in a sliding guide connection via a guide structure 1213, so that the transmission shaft 143 can drive the third drive component 16 to move along the third direction Z under the guidance of the guide structure 1213, thereby driving the nozzle component 19 arranged on the third drive component 16 to move along the third direction Z.

[0164] It can be understood that the third driving assembly 16 can be a linear driving mechanism, which is drivingly connected to the nozzle assembly 19 and can drive the nozzle assembly 19 to move along the first direction X.

[0165] In one embodiment, the third driving assembly 16 includes 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 parts 121. A sliding structure 162 is respectively provided at both ends of the guide rail 161 spaced along the first direction X. The sliding structure 162 is slidably matched with the guide structure 1213, so that the guide rail 161 can slide along the third direction Z. Each sliding structure 162 is connected to the transmission shaft 143 through a sliding ring 163, and the sliding ring 163 is sleeved on the outside of the transmission shaft 143. The sliding ring 163 and the transmission shaft 143 can be connected to each other through a thread, etc. to convert the rotational motion of the transmission shaft 143 into the linear motion of the sliding ring 163 along the third direction Z, thereby driving 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 to the nozzle assembly 19. 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 achieve 3D printing.

[0166] In this embodiment, the guide rail 161 is extended along the first direction X, and a track groove for guiding is generally provided on the guide rail 161 , and the nozzle assembly 19 can be movably connected to the guide rail 161 through the track groove.

[0167] In this embodiment, the guide structure 1213 is a groove-shaped structure recessed along the second direction Y, and the sliding structure 162 includes a sliding connection 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 it. The pulley 1622 is arranged on the outer side of the first connecting portion 121, and the pulley 1622 and the guide structure 1213 are respectively located on two opposite sides of the guide shaft 1623 along the second direction Y. The sliding connection block 1621 is respectively connected to the sliding ring 163 and the plurality of pulleys 1622, and the sliding ring 163 is driven by the transmission shaft 143 to drive the sliding connection block 1621 to move along the third direction Z under the guidance of the pulley 1622 and the guide shaft 1623; the sliding connection block 1621 is further connected to the guide rail 161, so that the guide rail 161 drives the nozzle assembly 19 to move along the third direction Z.

[0168] In other embodiments, if the guide structure 1213 is convex, the sliding structure 162 may not include the guide shaft 1623 , and the pulley 1622 may be directly connected to the guide structure 1213 .

[0169] It can be understood that the transmission shaft 143 disposed 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.

[0170] Further integration Fig.11 As shown, in one embodiment, the support portion 114 is provided with a matching cavity 1140 corresponding to the first assembly cavity 1210, and a third assembly opening 1141 that connects 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 with each other to accommodate the transmission shaft 143. During the assembly process, the transmission shaft 143 can pass through the third assembly opening 1141 from the matching cavity 1140 and further extend to be disposed in the first assembly cavity 1210.

[0171] Further integration Fig.12 and Fig.13 As shown, in one embodiment, the second driving assembly 15 includes a guide portion 151 and a first driving transmission structure 152. The guide portion 151 is fixedly connected to the positioning structure 13, and the first driving transmission structure 152 is respectively connected to the guide portion 151 and the molding platform 17, and is used to drive the molding platform 17 to move relative to the guide portion 151.

[0172] In one embodiment, the positioning structure 13 is connected to the bottom edge 112 or the second connecting portion 122 of the frame 11 and is integrally formed. The positioning structure 13 includes a positioning base plate 131, which is fixedly connected to the frame 11. The guide portion 151 is disposed on the surface of the positioning base plate 131 and is connected to the positioning base plate 131 for positioning the second driving component 15.

[0173] It can be understood that the positioning structure 13 is integrally formed on the gantry 10, and no extra installation process is required between the frame 11 and the positioning structure 13, so that the positioning structure 13 has higher precision than the frame 11, and the second drive component 15 is installed with the positioning structure 13, and the installation of the second drive component 15 can be directly positioned, ensuring the position accuracy of the second drive component 15 compared to the gantry 10, thereby improving the printing accuracy.

[0174] In this embodiment, the first driving transmission structure 152 may also include components with driving and / or transmission functions such as a driving motor, a transmission belt, and a rotating wheel, and the specific connection method, position relationship, working principle, etc. are not described in detail. The first driving transmission structure 152 is connected to the guide part 151 to achieve installation and positioning, and the positioning is further achieved through the positioning relationship between the guide part 151 and the positioning structure 13 to ensure the accuracy of the movement of the molding platform 17 driven by it.

[0175] In this embodiment, the positioning structure 13 further includes a positioning side plate 132, and the two positioning side plates 132 are respectively arranged on two opposite 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 both sides of the positioning bottom plate 131 along the first direction X.

[0176] In this embodiment, the second driving assembly 15 further includes a connecting frame 153, and the first driving transmission structure 152 is drivingly connected to the molding platform 17 via the connecting frame 153. The connecting frame 153 is also slidably connected to the guide plate, and is used to guide the molding platform 17 along the second direction Y.

[0177] Further integration Figure 1 and Figure 2 As shown, in one embodiment, the 3D printing device 1 further includes a base assembly 18 , and the base assembly 18 is connected to the gantry 10 via a second driving assembly 15 .

[0178] It is understandable 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 drive assembly 15 is connected and positioned with the gantry 10 through the positioning structure 13, and the base assembly 18 is connected with the second drive assembly 15 and then connected and positioned with the gantry 10, which can reduce the difficulty of installation and improve the printing accuracy.

[0179] In this embodiment, in order to improve the space utilization of the 3D printing device 1, the base assembly 18 and the second drive assembly 15 are embedded. That is, while the second drive assembly 15 and the base assembly 18 are respectively connected and positioned with the gantry 10, the second drive assembly 15 and the base assembly 18 have substantially the same thickness along the third direction Z, and the second drive assembly 15 and the base assembly 18 are substantially arranged at the same layer, so that the second drive assembly 15 is embedded inside the base assembly 18 to save space and improve aesthetics.

[0180] In other embodiments, the base assembly 18 may also be connected to the gantry 10 via the second drive assembly 15. It is understandable that the second drive assembly 15 is connected to the gantry 10 via the positioning structure 13 so as to have a higher installation accuracy, and the base assembly 18 is further connected to the second drive assembly 15, so that the installation process of the base assembly 18 is simple and has a higher accuracy.

[0181] In the above, the specific implementation of the present application is described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific implementation of the present application without departing from the spirit and scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A 3D printing device, comprising a nozzle assembly and a molding platform, characterized in that: The 3D printing device also includes: A gantry, comprising an integrally formed or detachably arranged frame, a connecting structure and a positioning structure, wherein the frame is used to support the gantry; A first driving assembly, which is mounted on the connecting structure, and the first driving assembly is used to drive the nozzle assembly; A second driving component is installed on the positioning structure, and the second driving component is used to drive the forming platform.

2. The 3D printing device according to claim 1, characterized in that: The connection structure comprises: A first connection portion, which is disposed on a side of the frame, and the first connection portion is used to guide the nozzle assembly; The second connecting portion is arranged at the bottom edge of the frame, and the second connecting portion is used for installing the first driving assembly.

3. The 3D printing device according to claim 2, characterized in that: The first driving assembly comprises: A driving unit for outputting a rotational torque; A transmission wheel group, comprising a driving wheel and a driven wheel, wherein the driving wheel is in transmission connection with the driving part, and the driving wheel and the driven wheel are in transmission connection with each other through a transmission belt; A transmission shaft, which is drivingly connected to the driven wheel; Wherein, the driving part and the transmission wheel group are connected to the second connection part, and the transmission shaft is used to drive the nozzle assembly to move along the first connection part.

4. The 3D printing device according to claim 3, characterized in that: The first connecting portion defines a first assembly cavity, and at least a portion of the transmission shaft is accommodated in the first assembly cavity.

5. The 3D printing device according to claim 4, characterized in that: 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.

6. The 3D printing device according to claim 4, characterized in that: 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 both sides of the first assembly cavity along a first direction and are respectively connected to the first assembly cavity, and the second assembly opening and the first assembly opening are used to expose the transmission shaft.

7. The 3D printing device according to claim 3, characterized in that: The first driving assembly includes two transmission shafts, and the two transmission shafts are arranged on opposite sides of the driving part along the first direction; the transmission wheel group includes one driving wheel, two driven wheels and two tensioning wheels, and the two driven wheels are respectively connected to one transmission shaft in transmission, 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 wheel is used to tension the transmission belt.

8. The 3D printing device according to claim 2, characterized in that: The first connecting portion is provided with a concave and / or convex guiding structure along the second direction, and the guiding structure is used to guide the movement of the nozzle assembly along the third direction, and the second direction intersects with the third direction.

9. The 3D printing device according to claim 1, characterized in that: The second driving assembly comprises: A guide portion, which is fixedly connected to the positioning structure; The first driving transmission structure is connected to the guide portion and the molding platform respectively, and is used to drive the molding platform to move relative to the guide portion.

10. The 3D printing device according to claim 9, characterized in that: The positioning structure includes a positioning base plate, the positioning base plate is fixedly connected to the frame, and the guide portion is arranged on the surface of the positioning base plate and is locked and connected to the positioning base plate to be used for positioning the second driving assembly.

11. The 3D printing device according to claim 1, characterized in that: The 3D printing device also includes: A third driving assembly is drivingly connected to the nozzle assembly and used to drive the nozzle assembly to move along the first direction. The third driving assembly is drivingly connected to the first driving assembly and is movably connected to the connecting structure to drive the nozzle assembly to move along the third direction. A base assembly is connected to the gantry through the second driving assembly.

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