3D printing device

Abstract

The present application provides a 3D printing device, comprising a gantry assembly and a base assembly which are connected. The 3D printing device further comprises a nozzle assembly, a dual-axis driving assembly and a forming platform. The nozzle assembly is movably connected to the gantry assembly. The dual-axis driving assembly is connected to the gantry assembly; the dual-axis driving assembly comprises a first driving part, first guide rails and second guide rails; the first guide rails are connected to the gantry assembly and disposed along a first direction; the second guide rails are movably connected to the first guide rails and disposed along a second direction; the nozzle assembly is movably connected to the second guide rails; the first driving part comprises synchronous belts and driving members; the driving members are used for driving the synchronous belts to rotate; the synchronous belts are connected to the nozzle assembly and the second guide rails, and used for driving the nozzle assembly to move along the second guide rails and / or driving the second guide rails to move along the first guide rails. The forming platform is movably connected to the base assembly, the forming platform is configured to move in a third direction relative to the base assembly, and the first direction, the second direction and the third direction are perpendicular to each other.

Description

3D printing equipment Technical Field

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

[0002] 3D printing is a rapid prototyping technology that uses digital model files as a foundation and utilizes adhesive materials such as special waxes, powdered metals, or plastics to create three-dimensional objects layer by layer. Fused deposition modeling (FDP) is one of the main 3D printing technologies. This technology heats and melts a hot-melt filament, extruding it from a nozzle and depositing it onto a build platform or a previously solidified layer of material, ultimately creating the object.

[0003] The gantry of a traditional 3D printer with a gantry assembly often has a lifting drive structure, which is usually a common structure of a screw and a guide rod. However, this structure has problems such as low driving accuracy and large space occupation.

[0004] How to solve the above problems and provide a 3D printing device with better performance based on the gantry assembly is something that those skilled in the art need to consider.

[0005] Summary of the Invention

[0006] In order to solve the problems in the prior art, an embodiment of the present application provides a 3D printing device with better performance based on a gantry assembly.

[0007] An embodiment of the present application provides a 3D printing device, which includes a gantry assembly and a base assembly connected thereto, and the 3D printing device further includes:

[0008] a nozzle assembly movably connected to the gantry assembly;

[0009] a dual-axis drive assembly connected to the gantry assembly, the dual-axis drive assembly comprising a first drive component, a first guide rail, and a second guide rail, the first guide rail being connected to the gantry assembly and arranged along a first direction, the second guide rail being movably connected to the first guide rail and arranged along a second direction, the nozzle assembly being movably connected to the second guide rail, the first drive component comprising a synchronous belt and a drive component, the drive component being used to drive the synchronous belt to rotate, the synchronous belt being connected to the nozzle assembly and the second guide rail, and being used to drive the nozzle assembly to move along the second guide rail and / or drive the second guide rail to move along the first guide rail;

[0010] A molding platform is movably connected to the base assembly, and the molding platform is configured to be movable along a third direction relative to the base assembly, wherein the first direction, the second direction, and the third direction are perpendicular to each other.

[0011] In one embodiment, the first driving part includes two driving members and two synchronous belts, the two driving members are respectively located on both sides of the second guide rail interval, each synchronous belt is connected to one driving member, and each synchronous belt is connected to the nozzle assembly.

[0012] In one embodiment, the dual-axis drive assembly further includes a slider, at least one end of the second guide rail is fixedly connected to the slider, and the slider is sleeved on the first guide rail and slidably connected to the first guide rail.

[0013] In one embodiment, the dual-axis drive assembly further includes two magnetic damping components, each of the magnetic damping components includes a magnetic block fixing component and a magnetic component, the two magnetic components 1672 are respectively arranged on opposite sides of the slider, and there is a magnetic force of mutual attraction between the two magnetic components, the two magnetic block fixing components are respectively arranged on opposite sides of the slider, and each magnetic component is respectively connected to one magnetic block fixing component.

[0014] In one embodiment, the dual-axis drive assembly further includes the magnetic damping member, which includes a magnetic block fixing member and a magnetic member. The magnetic block fixing member is fixed to the magnetic member, and the magnetic member is configured to be adsorbed on the first guide rail.

[0015] In one embodiment, the dual-axis drive assembly further includes two abutting damping members, which are arranged on opposite sides of the first guide rail and are respectively connected to the slider, and one end of the abutting damping member contacts and abuts against the surface of the first guide rail.

[0016] In one embodiment, both ends of the synchronous belt are respectively fixed to the nozzle assembly, and are used to drive the nozzle assembly to move along the second direction. The synchronous belt and the slider are connected through the transmission wheel, and are used to drive the second guide rail and the nozzle assembly connected to the second guide rail to move along the first direction.

[0017] In one embodiment, the dual-axis drive assembly further includes a tensioning portion, the tensioning portion including an elastic member, a tensioning wheel and a tensioning fixing frame, the tensioning wheel is rotatably disposed on the tensioning fixing frame, the tensioning fixing frame is connected to the gantry assembly through the elastic member, the tensioning wheel is located between the elastic member and the synchronous belt, and is used to push the synchronous belt through the elastic member to abut against the synchronous belt to tension the synchronous belt.

[0018] In one embodiment, the dual-axis drive assembly includes two first guide rails and two sliders, the two first guide rails are arranged parallel to each other along the first direction, the second guide rail is arranged between the two first guide rails along the second direction, and the two ends of the second guide rail are respectively slidably connected to the two first guide rails through the two sliders.

[0019] In one embodiment, the gantry frame of the gantry assembly is an integrally formed structure, the base frame of the base assembly is an integrally formed structure, and the gantry frame and the base frame are detachably connected.

[0020] It is understandable that the 3D printing device of the present application has at least the following beneficial effects:

[0021] The present application adopts a brand-new Corexz architecture, and adopts a dual-axis drive assembly to realize the synchronous control of the movement in the X-axis direction (first direction) and the Z-axis direction (second direction), which solves the problem of uneven load on the X-axis in the transmission Cartesian structure. The final practical effect is to reduce the torque requirements of the X-axis and Z-axis motors, and the movement is smoother. At the same time, since the Z-axis also adopts a synchronous belt transmission method, the printing quality problem caused by the gap between the Z-axis screw rods is solved, and the printing quality is greatly improved. At the same time, since the Z-axis screw rod transmission method is cancelled, the problem of large gap between the Z-axis screw rods is solved, and the cost is reduced and the printing accuracy is improved. In addition, different from the existing Corexy structure, the dual-motor drive Corexz architecture adopted in the present application has higher torque and faster response speed, so that the 3D printing equipment of the present application can adapt to the needs of high-speed printing.

[0022] This application adopts a full optical axis guide transmission solution, replacing the "V-wheel transmission" method, solving the problem of inconsistent V-wheel tensioning, eliminating the need for adjustment, improving product stability, and increasing product service life. At the same time, the optical axis transmission structure is smaller than the "V-wheel transmission" structure, reducing the volume of the entire machine.

[0023] This application designs an automatic tensioning structure for the synchronous belt, which solves the problem of inconsistent manual tensioning of the synchronous belt and the printing quality problem caused by inconsistent tensioning of the synchronous belt. The tensioning part is used to tension the synchronous belt, and the tensioning mechanism is fixed after tensioning to prevent changes in the tensioning force of the synchronous belt during the printing process, which greatly simplifies the consistency problem of back-end production and improves the quality and consistency of the product.

[0024] The main structures of both the gantry and base assemblies utilize an integrated die-cast structure. The gantry assembly integrates the Z-axis gantry column and the top crossbeam into one piece, reducing the number of parts and resolving issues such as the large number of parts, assembly difficulties, and high CNC processing costs associated with profile assembly. This also addresses the issue of consistency in back-end assembly, ensuring product consistency through molds, reducing back-end assembly steps, and reducing parts, thereby achieving cost reduction. Furthermore, it addresses the potential for insufficient assembly strength during assembly, avoiding the problem of loose assembly screws caused by vibration during product operation. The integrated structure of the gantry and base frames significantly enhances the structural strength of the product, significantly improving its overall strength.

[0025] This application is different from the traditional solution of external guide mechanism. It adopts a U-shaped gantry assembly to ensure strength while integrating the transmission mechanism, greatly reducing the size of the product and achieving higher volume utilization. At the same time, hiding the guide structure will reduce transmission failure problems caused by external dust and user operating errors, thereby improving the stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG1 is a schematic three-dimensional diagram of a 3D printing device provided in an embodiment of the present application along a main viewing angle.

[0027] FIG2 is a three-dimensional schematic diagram of a 3D printing device provided in an embodiment of the present application as viewed from the back.

[0028] FIG3 is a partial three-dimensional schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0029] FIG4 is a partial three-dimensional schematic diagram of a 3D printing device provided in an embodiment of the present application.

[0030] FIG5 is a partially enlarged three-dimensional schematic diagram of a 3D printing device provided in one embodiment of the present application.

[0031] FIG6 is a schematic structural diagram of a supporting damping member of a 3D printing device provided in one embodiment of the present application.

[0032] FIG7 is a plan view of a 3D printing device provided in another embodiment of the present application.

[0033] Description of main component symbols:

[0034] 3D printing equipment 10

[0035] Gantry assembly 11

[0036] Gantry frame 111

[0037] Column 1111

[0038] Top beam 1112

[0039] Connecting buckle 112

[0040] Base assembly 12

[0041] Base frame 120

[0042] Top wall 121

[0043] Side wall 122

[0044] Display component 123

[0045] Nozzle assembly 13

[0046] Forming platform 14

[0047] Rack 15

[0048] Dual-axis drive assembly 16

[0049] First driving component 161

[0050] Drive 1611

[0051] First drive motor 16111

[0052] Second drive motor 16112

[0053] First idler pulley 16113

[0054] Second idler pulley 16114

[0055] Synchronous belt 162

[0056] First transmission belt 1621

[0057] Second transmission belt 1622

[0058] Transmission wheel 163

[0059] First Wheel 1631

[0060] Second Wheel 1632

[0061] The third wheel 1633

[0062] The fourth wheel 1634

[0063] Fifth Wheel 1635

[0064] The Sixth Wheel 1636

[0065] The Seventh Wheel 1637

[0066] The Eighth Wheel of Revelation 1638

[0067] Slider 164

[0068] Active slot 1641

[0069] First guide rail 165

[0070] Second guide rail 166

[0071] Magnetic damping element 167

[0072] Magnetic fixing 1671

[0073] The magnetic member 1672 resists the damping member 168

[0074] Fixed housing 1681

[0075] Elastic pusher 1682

[0076] Glass beads 1683

[0077] Accommodation cavity 1684

[0078] First opening 1685

[0079] Tensioning part 169

[0080] Elastic 1691

[0081] Tensioner 1692

[0082] Tensioning bracket 1693

[0083] First direction X

[0084] Second direction Y

[0085] The third direction Z

[0086] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0087] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Shown in the accompanying drawings are 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 this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Similar figure 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 this 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, "includes" 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 meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless otherwise expressly defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and should not be interpreted as idealized or overly formal. The following will describe exemplary embodiments with reference to the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and identical or similar components will be given the same or similar reference numerals or similar technical terms.

[0088] Typically, the gantry of a traditional 3D printer with a gantry assembly often has a lifting drive structure, which is usually a common structure of a screw and a guide rod. However, this structure has problems such as low driving accuracy and large space occupation.

[0089] Therefore, an embodiment of the present application provides a 3D printing device, which includes a connected gantry assembly and a base assembly, and the 3D printing device also includes: a nozzle assembly, which is movably connected to the gantry assembly; a dual-axis drive assembly, which is connected to the gantry assembly, the dual-axis drive assembly including a first drive component, a first guide rail and a second guide rail, the first guide rail is connected to the gantry assembly and is arranged along a first direction, the second guide rail is movably connected to the first guide rail and is arranged along a second direction, the nozzle assembly is movably connected to the second guide rail, the first drive unit includes a synchronous belt and a drive member, the drive member is used to drive the synchronous belt to rotate, the synchronous belt is connected to the nozzle assembly and the second guide rail, and is used to drive the nozzle assembly to move along the second guide rail and / or drive the second guide rail to move along the first guide rail; a molding platform, which is movably connected to the base assembly, and the molding platform is constructed to be able to move along a third direction compared to the base assembly, and the first direction, the second direction and the third direction are perpendicular to each other.

[0090] Among them, the present application adopts a new Corexz architecture, and adopts a dual-axis drive assembly to realize the synchronous control of the X-axis direction (first direction) movement and the Z-axis direction (second direction) movement, which solves the problem of uneven X-axis load in the transmission Cartesian structure. The final actual effect is to reduce the torque requirements of the X-axis and Z-axis motors, and the movement is smoother. At the same time, since the Z-axis also adopts a synchronous belt transmission method, the printing quality problem caused by the gap between the Z-axis screw rods is solved, and the printing quality is greatly improved. At the same time, since the Z-axis screw rod transmission method is cancelled, the problem of large Z-axis screw rod gap is solved, and the cost is reduced and the printing accuracy is improved. In addition, the present application adopts a full optical axis guide transmission solution, replacing the V-wheel transmission method, solving the problem of inconsistent V-wheel tensioning, without the need for adjustment, improving the stability of the product, and improving the service life of the product. At the same time, the structure of the optical axis transmission is smaller than the V-wheel transmission structure, so that the volume of the whole machine is reduced.

[0091] At the same time, traditional gantry assembly 3D printers use profile splicing and assembly methods, which require CNC processing technology and have high requirements for parts processing accuracy. At the same time, the subsequent assembly process is complex, which places high demands on production assembly, and the consistency problems caused by assembly are poor.

[0092] Therefore, the gantry frame of the gantry assembly is an integrally formed structure, the base frame of the base assembly is an integrally formed structure, and the gantry frame and the base frame are detachably connected.

[0093] The main structures of the gantry assembly and the base assembly both adopt an integrated die-cast structure. The gantry assembly combines the Z-axis gantry column and the top crossbeam into one, reducing the number of parts and solving the problems of profile assembly, such as the large number of parts, assembly difficulties, and high CNC processing costs. At the same time, it also solves the problem of consistency in back-end assembly. The consistency of the product is ensured by the mold, which reduces the back-end assembly process and parts, thereby achieving the purpose of reducing costs. In addition, it also solves the problem of insufficient assembly strength that may be caused by assembly, and avoids the problem of loose assembly screws caused by vibration during the operation of the product. The gantry frame and the base frame adopt an integrated structure, which greatly enhances the structural strength of the product and greatly improves the overall strength.

[0094] Those skilled in the art will understand that "3D printing equipment" refers to equipment that can achieve 3D printing (additive manufacturing).

[0095] Those skilled in the art will understand that "consumables" refer to rod-shaped thermoplastic materials that are solid at room temperature. The consumables can be melted by heat and then cooled to form.

[0096] The specific implementation methods of the present application will be described in detail below with reference to the accompanying drawings.

[0097] As shown in Figures 1 and 2, an embodiment of the present application provides a 3D printing device 10, which includes a gantry assembly 11, a base assembly 12, a nozzle assembly 13, a dual-axis drive assembly 16, a molding platform 14, and a material rack 15. The base assembly 12 is used to be arranged on a supporting surface for placing the 3D printing device 10, the molding platform 14 is movably connected to the base assembly 12, the gantry assembly 11 is connected to the base assembly 12 and is arranged upright relative to the supporting surface, the gantry assembly 11 can be located above the molding platform 14, the dual-axis drive assembly 16 is connected to the gantry assembly 11, and the nozzle assembly 13 is movably connected to the gantry assembly 11 via the dual-axis drive assembly 16, so that the nozzle assembly 13 is located above the molding platform 14, and the material rack 15 is connected to the gantry assembly 11. The dual-axis drive assembly 16 is used to drive the nozzle assembly 13 to move along the first direction X and the second direction Y. The forming platform 14 is constructed to be able to move along the third direction Z compared to the base assembly 12. The first direction X, the second direction Y and the third direction Z are perpendicular to each other, so that the nozzle assembly 13 can move along the first direction X, the second direction Y and the third direction Z compared to the forming platform 14. The nozzle assembly 13 can extrude the consumables onto the surface of the forming platform 14 to obtain a 3D printed product.

[0098] In one embodiment, the dual-axis drive assembly 16 includes a first drive component 161, a first guide rail 165 and a second guide rail 166. The first guide rail 165 is connected to the gantry assembly 11 and is arranged along the first direction X. The second guide rail 166 is movably connected to the first guide rail 165 and is arranged along the second direction Y. The nozzle assembly 13 is movably connected to the second guide rail 166. The first drive unit includes a synchronous belt 162 and a drive member 1611. The drive member 1611 is used to drive the synchronous belt 162 to rotate. The synchronous belt 162 is connected to the nozzle assembly 13 and the second guide rail 166 to drive the nozzle assembly 13 to move through the second guide rail 166 and / or drive the second guide rail 166 to move through the first guide rail 165.

[0099] It is understandable that the present application adopts a brand-new Corexz architecture, and adopts a dual-axis drive assembly 16 to realize the synchronous control of the movement in the X-axis direction (first direction X) and the Z-axis direction (second direction Y), which solves the problem of uneven load on the X-axis in the transmission Cartesian structure. The final practical effect is to reduce the torque requirements of the X-axis and Z-axis motors, and the movement is smoother. At the same time, since the Z-axis also adopts the synchronous belt 162 transmission method, the printing quality problem caused by the gap between the Z-axis screw rods is solved, and the printing quality is greatly improved. At the same time, since the Z-axis screw rod transmission method is cancelled, the problem of large gap between the Z-axis screw rods is solved, and the cost is reduced and the printing accuracy is improved. In addition, the present application designs an automatic tensioning structure for the synchronous belt 162, which solves the problem of inconsistent manual tensioning of the synchronous belt 162, and solves the printing quality problem caused by inconsistent tensioning of the synchronous belt 162.

[0100] In one embodiment, the gantry frame 111 of the gantry assembly 11 is an integrally formed structure, and the base frame 120 of the base assembly 12 is an integrally formed structure. The gantry frame 111 and the base frame 120 are detachably connected.

[0101] In this embodiment, the gantry frame 111 is arranged in a "U" shape and includes two columns 1111 arranged parallel to each other along a first direction X, and a top crossbeam 1112 arranged along a second direction Y and located between the two columns 1111. The ends of the two columns 1111, distal to the top crossbeam 1112, are removably connected to the base frame 120 via bolts. The ends of the top crossbeam 1112, spaced apart along the second direction Y, are respectively connected to the ends of the two columns 1111, distal to the base assembly 12. The columns 1111 and the top crossbeam 1112 are integrally die-cast. During installation, the "U"-shaped gantry frame 111 is simply placed with its opening facing toward the base assembly 12 and connected.

[0102] In this embodiment, two material racks 15 can be arranged at intervals, one material rack 15 is connected to the side of the top beam 1112 away from the base assembly 12, and the other material rack 15 is connected to the side of one column 1111 away from the other column 1111.

[0103] In this embodiment, the base frame 120 includes a top wall 121 and side walls 122 disposed around the top wall 121. The top wall 121 and the side walls 122 are connected and integrally cast. The molding platform 14 is movably connected to the top wall 121. The two columns 1111 are detachably connected to the two oppositely disposed side walls 122, respectively. The other side wall 122 is connected to a display assembly 123. The top wall 121 and the side walls 122 are connected and enclosed to form a receiving portion (not shown). The receiving portion is located on the side of the top wall 121 away from the top crossbeam 1112. The receiving portion can be used to accommodate the wiring harness (not shown), connector (not shown), drive structure (not shown), etc. of the 3D printing device 10 to enhance the aesthetics of the 3D printing device 10.

[0104] It is understandable that the main structures of the gantry assembly 11 and the base assembly 12 both adopt an integrated die-cast structure. The gantry assembly 11 combines the Z-axis gantry column 1111 and the top crossbeam 1112 into one, reducing the number of parts and solving the problems of a large number of parts, difficult assembly, and high CNC processing costs caused by profile assembly. At the same time, it also solves the problem of consistency in the back-end assembly. The consistency of the product is ensured by the mold, and the back-end assembly process and parts are reduced, thereby achieving the purpose of reducing costs. Moreover, it also solves the problem of insufficient assembly strength that may be caused by assembly, and avoids the problem of loose assembly screws caused by vibration during the operation of the product. The gantry frame 111 and the base frame 120 adopt an integrated structure, which greatly enhances the structural strength of the product and greatly improves the overall strength.

[0105] It can be understood that this application is different from the traditional solution of external guide mechanism. It adopts a U-shaped gantry assembly 11, which ensures strength while integrating the transmission mechanism, greatly reducing the size of the product and achieving higher volume utilization. At the same time, hiding the guide structure will reduce transmission failure problems caused by external dust and user operating errors, thereby improving the stability of the product.

[0106] 2 and 4 , in one embodiment, the dual-axis drive assembly 16 includes two first guide rails 165 , which are arranged parallel to each other along a first direction X. A second guide rail 166 is arranged between the two first guide rails 165 along a second direction Y, with both ends of the second guide rail 166 slidably connected to the two first guide rails 165 . Both the first guide rail 165 and the second guide rail 166 are cylindrical optical axis structures.

[0107] In this embodiment, each first guide rail 165 is fixed to a column 1111. Opposing ends of the first guide rail 165 are respectively connected to the columns 1111. The middle regions of the first guide rail 165 located at the opposing ends do not directly contact the columns 1111. There are two second guide rails 166, each extending along the second direction Y. The two second guide rails 166 are spaced apart along the first direction X. The nozzle assembly 13 is simultaneously mounted on the two second guide rails 166 to enhance the smooth movement of the nozzle assembly 13.

[0108] In one embodiment, the dual-axis drive assembly 16 further includes a slider 164 . At least one end of the second guide rail 166 is fixedly connected to the slider 164 . The slider 164 is sleeved on the first guide rail 165 and slidably connected to the first guide rail 165 .

[0109] In this embodiment, the dual-axis drive assembly 16 includes two sliders 164. The two ends of the second guide rail 166 are movably connected to the first guide rail 165 via the two sliders 164. The two sliders 164 are respectively connected to the two ends of the second guide rail 166 that are opposite to each other along the second direction Y. The two second guide rails 166 are connected to the sliders 164 to regulate the position of the two second guide rails 166 relative to each other.

[0110] In one embodiment, the slider 164 defines a movable slot 1641 extending therethrough in the first direction X. The slider 164 is sleeved on the first guide rail 165. The movable slot 1641 is configured to allow the first guide rail 165 to be movably disposed therein, so that the second guide rail 166 and the slider 164 can be guided by the first guide rail 165 to move in the first direction X. It will be appreciated that the nozzle assembly 13 also defines a through hole (not shown) extending therethrough in the second direction Y, so that the nozzle assembly 13 can be guided by the second guide rail 166 to move in the second direction Y.

[0111] It can be understood that a matching part such as a copper sleeve (not shown) may be provided between the slider 164 and the first guide rail 165, and a matching part such as a copper sleeve (not shown) may also be provided between the nozzle assembly 13 and the second guide rail 166, so that the first guide rail 165 and the second guide rail 166 can have a better guiding effect.

[0112] In one embodiment, both ends of the timing belt 162 are fixed to the nozzle assembly 13, respectively, for driving the nozzle assembly 13 to move in the second direction Y. The timing belt 162 is connected to the slider 164 via a transmission wheel 163, for driving the second guide rail 166 and the nozzle assembly 13 connected to the second guide rail 166 to move in the first direction X.

[0113] In one embodiment, the first driving unit includes two driving members 1611 and two synchronous belts 162. The two driving members 1611 are respectively located on both sides of the interval between the second guide rails 166. Each synchronous belt 162 is connected to one driving member 1611. Each synchronous belt 162 is connected to the nozzle assembly 13 and the two sliders 164.

[0114] In one embodiment, the two driving members 1611 are a first drive motor 16111 and a second drive motor 16112, respectively. The two synchronous belts 162 are a first transmission belt 1621 and a second transmission belt 1622, respectively. The disconnected ends of the first transmission belt 1621 are connected to two sides of the nozzle assembly 13 spaced apart along the second direction Y. The first transmission belt 1621 is sleeved around a first idler pulley 16113, which is in driving connection with the first drive motor 16111, thereby establishing a driving connection between the first transmission belt 1621 and the first drive motor 16111. The disconnected ends of the second transmission belt 1622 are connected to two sides of the nozzle assembly 13 spaced apart along the second direction Y. The second transmission belt 1622 is sleeved around a second idler pulley 16114, which is in driving connection with the second drive motor 16112, thereby establishing a driving connection between the second transmission belt 1622 and the second drive motor 16112.

[0115] It can be understood that the first drive motor 16111 and the second drive motor 16112 (dual motors) work together to drive and synchronously drive the nozzle assembly 13 to move along the first direction X (Z-axis direction of the Cartesian coordinate system) and / or the second direction Y (X-axis direction of the Cartesian coordinate system), thereby increasing the torque that drives the nozzle assembly 13 to move and shortening the action time. Different from the single motor drive in the prior art, the dual motor drive used in this application is smoother in lifting and moving the nozzle assembly 13 during slicing reversal; wherein, the "slicing reversal" can be understood as: after the nozzle assembly 13 prints the Nth layer, it lifts up to print the N+1 layer. There may be a situation where the starting points of the N layer and the N+1 layer are inconsistent. For example, the coordinates of the end of printing the Nth layer are (10, 10, 1), and the coordinates of the start of printing the N+1 layer are (1, 1, 2). At this time, the nozzle assembly 13 needs to be moved quickly from the end of the N layer to the printing of the N+1 layer.

[0116] In one embodiment, the transmission wheel 163 connected to the first transmission belt 1621 includes a first rotating wheel 1631, a second rotating wheel 1632, a third rotating wheel 1633 and a fourth rotating wheel 1634. The first rotating wheel 1631 is connected to one slider 164, and the fourth rotating wheel 1634 is connected to another slider 164. The second rotating wheel 1632 and the third rotating wheel 1633 are arranged at intervals along the second direction Y and are respectively connected to the top crossbeam 1112. The first rotating wheel 1631 and the second rotating wheel 1632 are arranged at intervals along the first direction X, and the third rotating wheel 1633 and the fourth rotating wheel 1634 are arranged at intervals along the first direction X. One end of the first transmission belt 1621 is fixedly connected to the nozzle assembly 13, and the first transmission belt 1621 further extends along the second direction Y toward the direction away from the nozzle assembly 13 to be rotatably connected to the first rotating wheel 1631. The first transmission belt 1621 further extends along the first direction X toward the first drive motor 16111 to be connected to the first idler wheel 16113. The first transmission belt 1621 further extends along the first direction X toward the top beam 1112 to be transmission-connected to the second rotating wheel 1632. The first transmission belt 1621 further extends along the second direction Y to be transmission-connected to the third rotating wheel 1633. The first transmission belt 1621 further extends along the first direction X toward the side away from the top beam 1112 to be transmission-connected to the fourth rotating wheel 1634. The first transmission belt 1621 further extends along the second direction Y to be connected to the nozzle assembly 13.

[0117] In one embodiment, the transmission wheel 163 connected to the second transmission belt 1622 includes a fifth rotating wheel 1635, a sixth rotating wheel 1636, a seventh rotating wheel 1637 and an eighth rotating wheel 1638. The eighth rotating wheel 1638 is connected to one slider 164, the fifth rotating wheel 1635 is connected to another slider 164, the sixth rotating wheel 1636 and the seventh rotating wheel 1637 are arranged at intervals along the second direction Y and are respectively connected to the top crossbeam 1112, the fifth rotating wheel 1635 and the sixth rotating wheel 1636 are arranged at intervals along the first direction X, and the seventh rotating wheel 1637 and the eighth rotating wheel 1638 are arranged at intervals along the first direction X. One end of the second transmission belt 1622 is fixedly connected to the nozzle assembly 13, and the second transmission belt 1622 further extends along the second direction Y toward the direction away from the nozzle assembly 13 to be rotatably connected to the fifth rotating wheel 1635, the second transmission belt 1622 further extends along the first direction X toward the second drive motor 16112 to be connected to the second idler wheel 16114, the second transmission belt 1622 further extends along the first direction X toward the top beam 1112 to be transmission-connected to the sixth rotating wheel 1636, the second transmission belt 1622 further extends along the second direction Y to be transmission-connected to the seventh rotating wheel 1637, the second transmission belt 1622 further extends along the first direction X toward the side away from the top beam 1112 to be transmission-connected to the eighth rotating wheel 1638, and the second transmission belt 1622 further extends along the second direction Y to be connected to the nozzle assembly 13.

[0118] In this embodiment, the first rotating wheel 1631 and the eighth rotating wheel 1638 are connected to the same slider 164, the second rotating wheel 1632 and the seventh rotating wheel 1637 are arranged side by side at the connection area between the top beam 1112 and one column 1111, the third rotating wheel 1633 and the sixth rotating wheel 1636 are arranged side by side at the connection area between the top beam 1112 and another column 1111, and the fourth rotating wheel 1634 and the fifth rotating wheel 1635 are connected to the same slider 164. The first rotating wheel 1631 and the eighth rotating wheel 1638 are accommodated in a slider 164 on a side away from the movable groove 1641 therein, and the fourth rotating wheel 1634 and the fifth rotating wheel 1635 are accommodated in another slider 164 on a side away from the movable groove 1641 therein. The shaft (not shown) passing through the transmission wheel 163 is fixed to the slider 164 so that the rotating wheel and the slider 164 are fixed and can rotate. The cavity opened in the slider 164 can accommodate the transmission wheel 163 so that the transmission wheel 163 does not interfere with the first guide rail 165. As for the specific shape of the cavity in the slider 164, it is not elaborated here, and those skilled in the art can adjust it according to actual needs. The second rotating wheel 1632 and the seventh rotating wheel 1637 are connected to the gantry frame 111 through the connecting buckle 112 of the gantry assembly 11. The third rotating wheel 1633 and the sixth rotating wheel 1636 are connected to the gantry frame 111 through the connecting buckle 112 of the gantry assembly 11. The shaft (not shown) passing through the transmission wheel 163 is fixed to the connecting buckle 112 so that the rotating wheel is fixed to the connecting buckle 112 and can rotate.

[0119] It can be understood that this application adopts a full optical axis guide transmission solution, replacing the V-wheel transmission method, solving the problem of inconsistent V-wheel tensioning without the need for adjustment, improving the stability of the product, and increasing the service life of the product. At the same time, the structure of the optical axis transmission is smaller than the V-wheel transmission structure, which reduces the volume of the entire machine.

[0120] Further in combination with what is shown in Figure 5, in one embodiment, the dual-axis drive assembly 16 also includes a magnetic damping member 167, and the magnetic damping member 167 includes a magnetic block fixing member 1671 and a magnetic member 1672, the magnetic block fixing member 1671 is fixed to the magnetic member 1672, and the magnetic member 1672 is constructed to be able to be adsorbed on the first guide rail 165.

[0121] It can be understood that the material of the first guide rail 165 can be a metal material that can be attracted by the magnetic part 1672. The magnetic part 1672 is adsorbed on the part of the first guide rail 165 that is closest to it, and has a tendency to be difficult to separate from the part of the first guide rail 165. The slider 164 is fixed to the magnetic part 1672 by the magnetic block fixing part 1671, so that the slider 164 also has a tendency to be difficult to separate from the part of the first guide rail 165, which is used to counteract the tendency of the first guide rail 165 connected to the second guide rail 166 and the nozzle assembly 13 to slide down under the influence of gravity.

[0122] In one embodiment, the dual-axis drive assembly 16 includes two magnetic damping members 167, each of which includes a magnetic block fixing member 1671 and a magnetic member 1672. The two magnetic members 1672 are respectively disposed on opposite sides of the slider 164, and a magnetic force of attraction exists between the two magnetic members 1672. Two magnetic block fixing members 1671 are respectively disposed on opposite sides of the slider 164, and each magnetic member 1672 is connected to a magnetic block fixing member 1671.

[0123] It can be understood that in addition to the magnetic attraction of the magnetic member 1672 itself to the first guide rail 165, there is a mutual magnetic attraction between the two magnetic members 1672 located on the opposite sides of the slider 164, so that the magnetic block fixing members 1671 respectively connected to the two magnetic members 1672 tend to approach each other and clamp the first guide rail 165, making the slider 164 difficult to separate from the first guide rail 165, which is used to counteract the tendency of the first guide rail 165 connected to the second guide rail 166 and the nozzle assembly 13 to slide down under the influence of gravity.

[0124] In this embodiment, the magnetic damping member 167 is connected to the side of the slider 164 close to the driving member 1611 ; in other embodiments, the magnetic damping member 167 may also be provided on the side of the slider 164 away from the top crossbeam 1112 .

[0125] In one embodiment, the dual-axis drive assembly 16 further includes two abutting damping members 168 , which are disposed on opposite sides of the first guide rail 165 and are respectively connected to the slider 164 , and one end of the abutting damping member 168 contacts and abuts against the surface of the first guide rail 165 .

[0126] It can be understood that the end of the resisting damping member 168 resists the first guide rail 165. When the first guide rail 165 connected to the second guide rail 166 and the nozzle assembly 13 tends to move along the first direction X under the influence of gravity, the contact surface between the resisting damping member 168 and the first guide rail 165 generates a resistance force (such as friction force) in the opposite direction of the first direction X, which is used to counteract the tendency of the first guide rail 165 connected to the second guide rail 166 and the nozzle assembly 13 to slide down under the influence of gravity.

[0127] In one embodiment, further shown in conjunction with FIG6 , the resisting damping member 168 may be a glass ball screw, comprising a fixed housing 1681, an elastic pusher 1682, and a glass ball 1683. The resisting damping member 168 is connected to the slider 164 via the fixed housing 1681. The fixed housing 1681 defines an interior housing 1684 and a first opening 1685 communicating with the housing 1684. The glass ball 1683 is retained in the first opening 1685. The elastic pusher 1682 is disposed within the housing 1684 to impart an outward thrust to the glass ball 1683, causing it to resist the surface of the first guide rail 165. In other embodiments, the resisting damping member 168 may be a structure with a flexible material at its end, providing damping through frictional resistance between the flexible material and the first guide rail 165.

[0128] As will be appreciated, the damping member 168 is preferably a glass ball screw. Through a purely mechanical structure, the glass ball screw provides frictional damping between the slider 164 and the first guide rail 165, thereby preventing the slider from falling due to power outages. Furthermore, while providing a driving force to the glass ball 1683, the elastic pusher 1682 also absorbs force transmitted from the first guide rail 165 and / or the second guide rail 166 to the elastic pusher 1682 via the glass ball 1683. This allows the elastic pusher 1682 to buffer any wobbling between the first and second guide rails 165, 166. While absorbing this wobbling, the elastic pusher 1682 can also maintain its pressure against the glass ball 1683, thereby maintaining stability between the first and second guide rails 165, 166.

[0129] In this embodiment, the resisting damping member 168 is connected to the side of the slider 164 close to the top crossbeam 1112 ; in other embodiments, the resisting damping member 168 may also be provided on the side of the slider 164 away from the driving member 1611 .

[0130] It can be understood that the magnitude of the damping provided by the magnetic damping member 167 and the supporting damping member 168 to the slider 164 can be just used to resist the tendency of the first guide rail 165 connected to the second guide rail 166 and the nozzle assembly 13 to slide down under the influence of gravity, but will not cause too much impact on the process of the transmission belt pulling the slider 164 (for example, the slider 164 cannot be pulled by the transmission belt due to the damping).

[0131] 7 , in other embodiments, the dual-axis drive assembly 16 may further include a tensioning portion 169. The tensioning portion 169 includes an elastic member 1691, a tensioning pulley 1692, and a tensioning bracket 1693. The tensioning pulley 1692 is rotatably mounted on the tensioning bracket 1693. The tensioning bracket 1693 is connected to the gantry assembly 11 via the elastic member 1691. The tensioning pulley 1692 is located between the elastic member 1691 and the synchronous belt 162, and is configured to push the synchronous belt 162 against the elastic member 1691 to tension the synchronous belt 162.

[0132] As will be appreciated, there are two tensioning units 169, both connected to the top crossbeam 1112. One tensioning unit 169 is disposed between the second rotating wheel 1632 and the third rotating wheel 1633 and is connected to the first transmission belt 1621, while the other tensioning unit 169 is disposed between the sixth rotating wheel 1636 and the seventh rotating wheel 1637 and is connected to the second transmission belt 1622. The tensioning wheel 1692 of the tensioning unit 169 pushes the first transmission belt 1621 or the second transmission belt 1622 toward the side where the base driving member 1611 is located, thereby tensioning the first transmission belt 1621 and the second transmission belt 1622.

[0133] It can be understood that each tensioning portion 169 includes two elastic members 1691, and the two elastic members 1691 are arranged on opposite sides of the tensioning wheel 1692 along the second direction Y. The two elastic members 1691 are both connected to the tensioning fixing frame 1693, so that the tensioning process of the tensioning wheel 1692 is smoother.

[0134] It can be understood that the tensioning part 169 is used to tension the synchronous belt 162. After tensioning, the tensioning part 169 is fixed to prevent the tension of the synchronous belt 162 from changing during the printing process, which greatly simplifies the consistency problem of back-end production and improves the quality and consistency of the product.

[0135] In one embodiment, the build platform 14 may include a heated aluminum substrate (not shown), a printing platform (not shown), and a thermal sensing unit (not shown). The heated aluminum substrate is used to heat the printing platform to facilitate bonding of models printed on the hot bed, while the printing platform is used to attach and remove the models. The thermal sensing unit is used to sense temperature. It is understood that the build platform 14 can be driven and connected to the base frame 120 via a drive structure (not shown) similar to the dual-axis drive assembly 16. The specific structure is not detailed here.

[0136] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the scope of the present application. Such modifications and substitutions are within the scope of the present application.

Claims

1. A 3D printing device, comprising a gantry assembly and a base assembly connected, characterized in that: The 3D printing device also includes: A nozzle assembly, which is movably connected to the gantry assembly; A dual-axis drive assembly connected to the gantry assembly, the dual-axis drive assembly comprising a first drive component, a first guide rail and a second guide rail, the first guide rail being connected to the gantry assembly and arranged along a first direction, the second guide rail being movably connected to the first guide rail and arranged along a second direction, the nozzle assembly being movably connected to the second guide rail, the first drive component comprising a synchronous belt and a drive member, the drive member being used to drive the synchronous belt to rotate, the synchronous belt being connected to the nozzle assembly and the second guide rail, and being used to drive the nozzle assembly to move through the second guide rail and / or drive the second guide rail to move through the first guide rail; A molding platform is movably connected to the base assembly, and the molding platform is constructed to be able to move along a third direction relative to the base assembly, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The 3D printing device according to claim 1, characterized in that: The first driving part includes two driving members and two synchronous belts. The two driving members are respectively located on both sides of the second guide rail interval. Each synchronous belt is connected to one driving member, and each synchronous belt is connected to the nozzle assembly.

3. The 3D printing device according to claim 1, characterized in that: The dual-axis driving assembly further includes a slider, at least one end of the second guide rail is fixedly connected to the slider, and the slider is sleeved on the first guide rail and slidably connected to the first guide rail.

4. The 3D printing device according to claim 1, characterized in that: The dual-axis drive assembly also includes two magnetic damping parts, each of which includes a magnetic block fixing part and a magnetic part. The two magnetic parts are respectively arranged on the opposite sides of the slider, and there is a magnetic force of mutual attraction between the two magnetic parts. The two magnetic block fixing parts are respectively arranged on the opposite sides of the slider, and each magnetic part is connected to one of the magnetic block fixing parts.

5. The 3D printing device according to claim 3, characterized in that: The dual-axis driving assembly further comprises the magnetic damping member, which comprises a magnetic block fixing member and a magnetic member, wherein the magnetic block fixing member is fixed to the magnetic member, and the magnetic member is configured to be able to be adsorbed on the first guide rail.

6. The 3D printing device according to claim 3, characterized in that: The dual-axis driving module further includes two abutting damping members, which are arranged on opposite sides of the first guide rail and are respectively connected to the slider, and one end of the abutting damping member contacts and abuts against the surface of the first guide rail.

7. The 3D printing device according to claim 3, characterized in that: The two ends of the synchronous belt are respectively fixed to the nozzle assembly for driving the nozzle assembly to move along the second direction. The synchronous belt is connected to the slider through the transmission wheel for driving the second guide rail and the nozzle assembly connected to the second guide rail to move along the first direction.

8. The 3D printing device according to claim 7, characterized in that: The dual-axis drive assembly also includes a tensioning part, which includes an elastic member, a tensioning wheel and a tensioning fixed frame. The tensioning wheel is rotatably arranged on the tensioning fixed frame. The tensioning fixed frame is connected to the gantry assembly through the elastic member. The tensioning wheel is located between the elastic member and the synchronous belt and is used to push the synchronous belt through the elastic member to abut against the synchronous belt to tension the synchronous belt.

9. The 3D printing device according to claim 1, characterized in that: The dual-axis drive assembly includes two first guide rails and two sliders, the two first guide rails are arranged in parallel along the first direction, the second guide rail is arranged between the two first guide rails along the second direction, and the two ends of the second guide rail are slidably connected to the two first guide rails through the two sliders.

10. The 3D printing device according to claim 1, characterized in that: The gantry frame of the gantry assembly is an integrally formed structure, the base frame of the base assembly is an integrally formed structure, and the gantry frame is detachably connected to the base frame.

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