Transmission structure for 3D printer and 3D printer

Abstract

The transmission structure specifically comprises an X-axis transmission assembly, a Y-axis transmission assembly, a Z-axis transmission assembly, a cross-shaped sliding block assembly used for installing a 3D printing head, a main body supporting structure and a driving motor assembly, and is characterized in that the main body supporting structure comprises a middle supporting plate, a supporting column and a bottom supporting frame; the upper end of the supporting column is vertically connected with the middle supporting plate, and the lower end of the supporting column is vertically connected with the bottom supporting frame. The X-axis transmission assembly and the Y-axis transmission assembly are fixed to the lower portion and the upper portion of the middle supporting plate respectively, and the Z-axis transmission assembly is fixed to the lower portion of the middle supporting plate and the inner side of the bottom supporting frame. On the basis of the prior art, the research design is reasonable in structure, convenient to assemble and simple to maintain, and meanwhile, the printing precision and the running stability are further improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field, and particularly relates to a transmission structure for a 3D printer and a 3D printer. BACKGROUND

[0002] A 3D printer (also known as a three-dimensional printer or a stereoscopic printer) is a process equipment of rapid prototyping. The 3D printing technology mainly adopted by the 3D printer at present is Fused Deposition Modeling (FDM), which is a technology of constructing a three-dimensional object through layer-by-layer printing based on a digital model by using powdered metal or plastic and the like. The technology is commonly used for manufacturing a model in the fields of mold manufacturing and industrial design, and is gradually used for direct manufacturing of some products. The technology is applied in the fields of industrial design, automobile machinery, aeronautics and astronautics, medical and health care, education, civil engineering and other fields.

[0003] The transmission structure of the 3D printer mainly comprises an X-axis transmission assembly, a Y-axis transmission assembly and a Z-axis transmission assembly. Whether the structural design of the transmission assembly is reasonable directly relates to the printing precision of the 3D printer. At present, the consumer-grade 3D printers on the market mainly adopt a Corexy structure. Due to the structural characteristics, the Corexy structure has the problems of complex part assembly, difficult maintenance, limited precision improvement space and the like. For the Z-axis transmission assembly, two to three light shafts are generally used as the track guide for the up-down movement of the Z-axis platform in the prior art, and a lead screw is used as the transmission structure. The stability and precision during the running may finally affect the printing quality.

[0004] Therefore, whether a transmission structure for a 3D printer can be researched and designed to have the advantages of convenient assembly, simple maintenance, high printing precision and stable running becomes a technical problem to be solved. SUMMARY

[0005] The application aims to at least solve one of the technical problems in the prior art, researches and designs a transmission structure for a 3D printer and a 3D printer, improves the existing structure, makes the structural design reasonable, the assembly convenient, the maintenance simple, and further improves the printing precision and the running stability.

[0006] The embodiment of the first aspect of the application provides a transmission structure for a 3D printer, comprising an X-axis transmission assembly, a Y-axis transmission assembly, a Z-axis transmission assembly, a cross slider assembly for installing a 3D printing head, a main body support structure and a driving motor assembly, characterized in that the main body support structure comprises a middle support plate, a support column and a bottom support frame, the upper end of the support column is connected with the middle support plate perpendicularly, and the lower end of the support column is connected with the bottom support frame perpendicularly; the X-axis transmission assembly and the Y-axis transmission assembly are respectively fixed below and above the middle support plate, and the Z-axis transmission assembly is fixed below the middle support plate and inside the bottom support frame; the driving motor assembly comprises an X-axis motor, a Y-axis motor, a Z-axis motor, a motor synchronous pulley and a motor isolation column, the X-axis motor and the Y-axis motor are respectively installed below the middle support plate and inside the support column, and the Z-axis motor is installed inside the lower end of the support column.

[0007] The X-axis transmission assembly comprises an X-axis synchronous assembly and an X-axis guide rail assembly; the X-axis synchronous assembly comprises an X-axis synchronous belt, an X-axis synchronous pulley, an X-axis synchronous idler, a synchronous pulley isolation column, a fixing screw and an X-axis tensioning structure; the X-axis guide rail assembly comprises a Y optical axis, an X-axis linear guide rail, an X-axis guide rail slider, an X-axis slider connecting piece and an X-axis synchronous belt pressing strip; the X-axis synchronous belt is composed of an X-axis synchronous belt outer section and an X-axis synchronous belt inner section, and the X-axis synchronous assembly and the X-axis guide rail assembly are connected with each other through the X-axis synchronous belt and the X-axis synchronous belt pressing strip.

[0008] The Y-axis transmission assembly comprises a Y-axis synchronous assembly and a Y-axis guide rail assembly; the Y-axis synchronous assembly comprises a Y-axis synchronous belt, a Y-axis synchronous pulley, a Y-axis synchronous idler, a synchronous pulley isolation column, a fixing screw and a Y-axis tensioning structure; the Y-axis guide rail assembly comprises an X optical axis, a Y-axis linear guide rail, a Y-axis guide rail slider, a Y-axis slider connecting piece and a Y-axis synchronous belt pressing strip; the Y-axis synchronous belt is composed of a Y-axis synchronous belt outer section and a Y-axis synchronous belt inner section, and the Y-axis synchronous assembly and the Y-axis guide rail assembly are connected with each other through the Y-axis synchronous belt and the Y-axis synchronous belt pressing strip.

[0009] The Z-axis transmission assembly comprises a Z-axis synchronous assembly, a Z-axis guide rail assembly and a Z-axis lifting platform assembly; the Z-axis synchronous assembly comprises a Z-axis synchronous belt, a Z-axis synchronous pulley and a Z-axis tensioning structure; the Z-axis guide rail assembly comprises a Z optical axis, a Z-axis screw, an optical axis support seat, a linear bearing, a screw bearing, a screw nut, a screw bearing seat and a locking nut; the Z-axis lifting platform assembly comprises a printing platform, a platform support plate, a platform support frame, an anti-loosening short screw, an anti-loosening long screw and a spring support anti-loosening structure; the spring support anti-loosening structure comprises a bolt, an isolation support column, a spring and an adjusting nut.

[0010] The X-axis motor is fixed to the upper left corner below the middle support plate through the motor isolation column, and the motor synchronous pulley is connected with the output end of the X-axis motor.

[0011] The transmission structure of the present application, when X-axis axial movement is needed, the X-axis motor drives the X-axis synchronous assembly and the X-axis guide rail assembly, driving the cross slider assembly along the X-axis axial movement; when Y-axis axial movement is needed, the Y-axis motor drives the Y-axis synchronous assembly and the Y-axis guide rail assembly, driving the cross slider assembly along the Y-axis axial movement; when Z-axis axial movement is needed, the Z-axis motor drives the Z-axis synchronous assembly and the Z-axis guide rail assembly, driving the Z-axis lifting platform assembly along the Z-axis axial movement.

[0012] In the X-axis synchronous assembly, the X-axis tensioning structure is fixed to the right side below the middle support plate, the X-axis synchronous pulleys are each fixed to the four corners below the middle support plate under the cooperation of the synchronous pulley isolation column and the fixing screw, and the X-axis synchronous idlers are fixed to the upper left corner, the lower left corner and the lower right corner below the middle support plate under the cooperation of the synchronous pulley isolation column and the fixing screw; the X-axis synchronous belt is connected in sequence with the X-axis tensioning structure, the X-axis synchronous pulley at the lower right corner, the X-axis synchronous pulley at the lower left corner, the X-axis synchronous pulley at the upper left corner, the X-axis synchronous idler at the upper left corner, the motor synchronous pulley, and the X-axis synchronous pulley at the upper right corner, forming an X-axis synchronous belt outer section; the X-axis synchronous belt is connected in sequence with the X-axis tensioning structure, the X-axis synchronous idler at the lower right corner, the X-axis synchronous idler at the lower left corner, the X-axis synchronous idler at the upper left corner, and the X-axis synchronous pulley at the upper right corner, forming an X-axis synchronous belt inner section; the X-axis synchronous belt outer section and the X-axis synchronous belt inner section are parallel to each other and opposite in transmission direction, forming a complete closed loop of the X-axis synchronous belt.

[0013] In the X-axis guide rail assembly, the Y optical axis penetrates the cross slider assembly, and the two ends of the Y optical axis are respectively fixed with one X-axis slider connecting piece, each X-axis slider connecting piece is installed with one X-axis synchronous belt pressing strip, each X-axis slider connecting piece is installed on one X-axis guide rail slider, and each X-axis guide rail slider is installed on one X-axis linear guide rail, the X-axis linear guide rails are parallel and symmetrical to each other along the two inner edges opposite to the middle support plate, and are fixedly installed below the middle support plate.

[0014] Further, one of the X-axis synchronous belt pressing strips is connected with the outer section of the X-axis synchronous belt and locked at the outer side interface of one of the X-axis slider connecting members; the other X-axis synchronous belt pressing strip is connected with the inner section of the X-axis synchronous belt and locked at the inner side interface of the other X-axis slider connecting member.

[0015] Further, the X-axis motor drives the X-axis synchronous belt to move, the X-axis synchronous belt drives the X-axis synchronous belt pressing strip to move, the X-axis synchronous belt pressing strip cooperates with the X-axis slider connecting member, the X-axis guide rail slider and the Y optical axis to move in the same direction, and drives the cross slider assembly to move along the X-axis.

[0016] In the Y-axis synchronous assembly, the Y-axis tensioning structure is fixed on the upper side above the middle support plate, the Y-axis synchronous pulleys are each fixed on the upper left corner, the lower left corner and the lower right corner above the middle support plate under the cooperation of the synchronous pulley isolation column and the fixing screw, and the Y-axis synchronous idlers are each fixed on the upper left corner, the lower left corner and the lower right corner above the middle support plate under the cooperation of the synchronous pulley isolation column and the fixing screw; the Y-axis synchronous belt is sequentially connected with the Y-axis tensioning structure, the Y-axis synchronous pulley at the upper left corner, the Y-axis synchronous pulley at the lower left corner, the Y-axis synchronous pulley at the lower right corner, and the motor synchronous pulley at the upper right corner, to form a Y-axis synchronous belt outer section; the Y-axis synchronous belt is sequentially connected with the Y-axis tensioning structure, the Y-axis synchronous idler at the upper left corner, the Y-axis synchronous idler at the lower left corner, the Y-axis synchronous idler at the lower right corner, and the motor synchronous pulley at the upper right corner, to form a Y-axis synchronous belt inner section; the Y-axis synchronous belt outer section and the Y-axis synchronous belt inner section are parallel to each other and opposite in transmission direction, to form a complete closed loop Y-axis synchronous belt.

[0017] In the Y-axis guide rail assembly, the X optical axis penetrates the cross slider assembly, both ends of the X optical axis are each fixed with one Y-axis slider connecting member, each Y-axis slider connecting member is each installed with one Y-axis synchronous belt pressing strip, each Y-axis slider connecting member is each installed on one Y-axis guide rail slider, each Y-axis guide rail slider is respectively installed on one Y-axis linear guide rail, the Y-axis linear guide rail is perpendicular to the X-axis linear guide rail, and simultaneously parallel and symmetrical to the other two inner edges opposite to the middle support plate, and is fixedly installed above the middle support plate.

[0018] Further, one of the Y-axis synchronous belt pressing strips is connected with the outer section of the Y-axis synchronous belt and locked at the outer side interface of one of the Y-axis slider connecting members; the other Y-axis synchronous belt pressing strip is connected with the inner section of the Y-axis synchronous belt and locked at the inner side interface of the other Y-axis slider connecting member.

[0019] Further, the Y-axis motor drives the Y-axis synchronous belt movement, the Y-axis synchronous belt drives the Y-axis synchronous belt strip movement, and the Y-axis synchronous belt strip cooperates with the Y-axis slider connector, the Y-axis guide rail slider and the X-ray axis in the same direction movement, drives the cross slider assembly to move along the Y-axis axial movement.

[0020] In the Z-axis synchronous assembly, two Z-axis synchronous pulleys are respectively installed at the lower left corner and the upper right corner of the inner side of the bottom support frame and are respectively connected with two Z-axis lead screws; the Z-axis tensioning structure is fixed to the inner side top surface of the bottom support frame and is located between the Z-axis synchronous pulley at the lower left corner and the motor synchronous pulley; the Z-axis synchronous belt is connected in sequence with the motor synchronous pulley, the Z-axis tensioning structure, the Z-axis synchronous pulley at the upper right corner, the Z-axis tensioning structure, the Z-axis synchronous pulley at the lower left corner, and the motor synchronous pulley, forming a complete closed loop Z-axis synchronous belt; the Z-axis synchronous belt connected between the Z-axis synchronous pulley at the upper right corner and the Z-axis tensioning structure is perpendicular to the Z-axis synchronous belt connected between the Z-axis synchronous pulley at the lower left corner and the motor synchronous pulley.

[0021] In the Z-axis guide rail assembly, the Z-axis lead screw penetrates the screw nut and is threadedly connected with the screw nut, one end of the Z-axis lead screw is sleeved with the screw bearing, penetrates vertically and is fixed below the middle support plate, the other end of the Z-axis lead screw penetrates vertically the bottom support frame, is connected with the screw bearing seat and is locked with the locking nut, and the number of the Z-axis lead screws is 1-4; the screw bearing seat is installed on the inner side top surface of the bottom support frame; four Z-axis shafts penetrate vertically the linear bearing and the bottom support frame, and the two ends of the Z-axis shafts are locked with the shaft support seat and are respectively fixed below the middle support plate and on the inner side top surface of the bottom support frame.

[0022] In the Z-axis lifting platform assembly, the platform support plate is connected with the platform support frame in up and down directions and is locked with the anti-loosening short screw; the printing platform is fixed above the platform support frame and is parallel with the platform support plate; the bolt penetrates vertically from top to bottom through the printing platform, the isolation support column, the spring and the platform support frame and is locked with the adjusting nut, the bolt, the isolation support column and the spring are located between the printing platform and the platform support frame, and the adjusting nut is located below the platform support frame, thereby forming the spring support anti-loosening structure.

[0023] Further, under the position matching of the Z-axis tensioning structure, the wrap angle between the Z-axis synchronous pulley, the motor synchronous pulley and the Z-axis synchronous belt can be increased, and the transmission efficiency and stability can be improved.

[0024] Further, the platform support plates are connected with the lead screw nut and the linear bearing respectively, and are locked from bottom to top by the anti-loosening long screw.

[0025] Further, the spring support anti-loosening structure can reduce the deformation of the printing platform in the Z-axis axial direction, and reduce the frequency of subsequent leveling of the 3D printer.

[0026] Further, the Z-axis motor drives the Z-axis synchronous belt to move, the Z-axis synchronous belt drives the Z-axis synchronous pulley to rotate, the Z-axis synchronous pulley drives the Z-axis lead screw to rotate, and the Z-axis lead screw drives the lead screw nut to move in the same direction with the platform support plate, the platform support frame and the printing platform, so as to move along the Z-axis axial direction guided by the Z-axis.

[0027] Further, when the platform support plate moves downward along the Z-axis axial direction, the platform support plate can be in the same horizontal plane as the upper end surface of the bottom support frame.

[0028] The second aspect of the embodiment of the application provides a 3D printer, comprising a 3D printing head, a functional module and the 3D printer transmission structure provided by the first aspect of the embodiment of the application. The 3D printing head is arranged on the cross slide assembly and is used for heating and extruding a wire material to print a model; the functional module is installed on the inner side of the bottom support frame, and the functional module is used for managing the whole process of the operation of the 3D printer.

[0029] The beneficial effects of the research design scheme of the application include: the transmission structure comprises the X-axis transmission assembly, the Y-axis transmission assembly and the Z-axis transmission assembly, the structure design is reasonable and simple, the production and installation are convenient, the product consistency is stronger, the printing work precision is higher, and the stability is better. The concentricity, parallelism and perpendicularity errors of the middle support plate are smaller, the X-axis transmission assembly, the Y-axis transmission assembly and the Z-axis transmission assembly are connected as a whole, so as to further improve the structural precision, strength and stability, reduce the maintenance difficulty and cost; the spring support anti-loosening structure is designed on the Z-axis lifting platform assembly, and the frequency of subsequent leveling of the 3D printer is reduced. The research design scheme of the application plays a very important role in the printing quality of the 3D printing, and the application has the advantages of simple structure, stable operation, easy maintenance, high printing precision and the like. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is an isometric view of the transmission structure and the 3D printer of the application.

[0031] Figure 2 It is a structure schematic view of the Y-axis transmission assembly of the application.

[0032] Figure 3 Figure 1 is a schematic diagram of the X-axis transmission assembly structure of the present application.

[0033] Figure 4 Figure 2 is a schematic diagram of the Y-axis transmission assembly structure of the present application.

[0034] Figure 5 Figure 2 is a schematic diagram of the X-axis transmission assembly structure of the present application.

[0035] Figure 6 Figure 4 is a cross-sectional view of the mutual connection of the Y-axis synchronous assembly and the Y-axis guide rail assembly of the present application.

[0036] Figure 7 Figure 5 is a cross-sectional view of the mutual connection of the X-axis synchronous assembly and the X-axis guide rail assembly of the present application.

[0037] Figure 8 Figure 6 is a schematic diagram of the Z-axis transmission assembly structure of the present application.

[0038] Figure 9 Figure 7 is a schematic diagram of the Z-axis transmission assembly structure of the present application.

[0039] Figure 10 Figure 8 is a schematic diagram of the Z-axis synchronous assembly and the Z-axis guide rail assembly of the present application.

[0040] Figure 11 Figure 9 is a schematic diagram of the Z-axis synchronous assembly and the Z-axis guide rail assembly of the present application.

[0041] Figure 12 Figure 10 is a cross-sectional view of the spring support anti-loose structure of the Z-axis lifting platform assembly of the present application.

[0042] Figure 13 Figure 11 is an isometric view of the 3D printer of the present application.

[0043] Label explanation.

[0044] 1, X-axis transmission assembly; 11, X-axis synchronous assembly; 111, X-axis synchronous belt; 1111, outer section of X-axis synchronous belt; 1112, inner section of X-axis synchronous belt; 112, X-axis synchronous pulley; 113, X-axis synchronous idler; 114, synchronous pulley isolation column; 115, fixing screw; 116, X-axis tensioning structure; 12, X-axis guide rail assembly; 121, Y optical axis; 122, X-axis linear guide rail; 123, X-axis guide rail slider; 124, X-axis slider connecting piece; 125, X-axis synchronous belt pressing strip.

[0045] 2, Y-axis transmission assembly; 21, Y-axis synchronous assembly; 211, Y-axis synchronous belt; 2111, Y-axis synchronous belt outer section; 2112, Y-axis synchronous belt inner section; 212, Y-axis synchronous pulley; 213, Y-axis synchronous idler; 214, synchronous pulley isolation column; 215, fixing screw; 216, Y-axis tensioning structure; 22, Y-axis guide rail assembly; 221, X light axis; 222, Y-axis linear guide rail; 223, Y-axis guide rail slider; 224, Y-axis slider connecting piece; 225, Y-axis synchronous belt pressing strip.

[0046] 3, Z-axis transmission assembly; 31, Z-axis synchronous assembly; 311, Z-axis synchronous belt; 312, Z-axis synchronous pulley; 313, Z-axis tensioning structure; 32, Z-axis guide rail assembly; 321, Z light axis; 322, Z-axis screw; 323, light axis support seat; 324, linear bearing; 325, screw bearing; 326, screw nut; 327, screw bearing seat; 328, locking nut; 33, Z-axis lifting platform assembly; 331, printing platform; 332, platform support plate; 333, platform support frame; 334, anti-loosening short screw; 335, anti-loosening long screw; 336, spring support anti-loosening structure; 3361, bolt; 3362, isolation support column; 3363, spring; 3364, adjusting nut.

[0047] 4, drive motor assembly; 41, X-axis motor; 42, Y-axis motor; 43, Z-axis motor; 44, motor synchronous pulley; 45, motor isolation column.

[0048] 5, main body support structure; 51, middle support plate; 52, support column; 53, bottom support frame.

[0049] 6, cross slider assembly.

[0050] 7, 3D printing head.

[0051] 8, function module. DETAILED DESCRIPTION

[0052] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings, it should be pointed out that the embodiments are only specific elaboration of the application, and should not be regarded as limitation of the application, the purpose of the embodiments is to enable those skilled in the art to better understand and reproduce the technical scheme of the present application, the protection scope of the present application should still be limited by the scope defined in the claims; unless otherwise defined, the technical terms or scientific terms involved in the present application should be the usual meaning understood by those skilled in the art in the technical field to which the present application belongs.

[0053] The terms "one", "a", "an", "the", and similar referents in the context of the application are to be construed to be a use of the singular or plural number, as is appropriate to the context. The terms "comprising", "comprises" and "comprised of" as well as conjugations thereof, are used in the application to mean that the object or method described includes, but is not limited to, those steps and / or objects.

[0054] The term "a plurality" in the context of the application refers to two or more. Furthermore, the terms "X", "Y", "Z", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like in the context of the application are used for description only and do not indicate or imply that the device or apparatus must have a particular orientation, be constructed or operated in a particular orientation, and are not to be construed or intimated as limiting the application as posed to a particular spatial orientation, being constructed or operated in a particular spatial orientation, and are not to be construed or intimated as limiting the application. The terms "parallel", "perpendicular", "co-directional" are relative to the current technology level, not the absolute strict definition in mathematics, and a small deviation is allowed. For example, A is parallel to B, which means A is parallel to B or approximately parallel to B, and the included angle between A and B is between 0° and 10°. For another example, A is perpendicular to B, which means A is perpendicular to B or approximately perpendicular to B, and the included angle between A and B is between 80° and 100°. For another example, A is co-directional to B, which means A is parallel to B or approximately parallel to B, and the included angle between A and B is between 0° and 10°.

[0055] In the application, unless otherwise explicitly specified and limited, the terms "fixed", "provided", "mounted", "connected" can mean that one part is directly on another part or there can be a middle part. "Fixed" can be understood as "fixed connection", and "provided", "mounted", "connected" can be understood as a kind of connection. At the same time, the connection can include mechanical connection or structural connection, and can also be understood as electrical connection, thermal connection or communication connection. For mechanical connection or structural connection, the connection includes detachable connection and non-detachable connection, for example, fixed connection can include detachable fixed connection, non-detachable fixed connection or one-piece, rotary connection can include detachable rotary connection and non-detachable rotary connection, and sliding connection can include detachable sliding connection and non-detachable sliding connection. The connection can also be direct connection or indirect connection through a component. For example, for detachable fixed connection, the position relationship between at least two objects of the connection can be fixed in the installed state. Similarly, for example, there are rotary connection, sliding connection, etc. "Rigid", "rigid connection", "rigid fixation" are not absolutely not deformed in the physical sense, and in the application, "rigid", "rigid connection", "rigid fixation" allow a small amount of deformation.

[0056] Example 1.

[0057] Reference Figures 1-12 , shown a transmission structure for 3D printer. Including X axis transmission assembly 1, Y axis transmission assembly 2, Z axis transmission assembly 3, cross slide assembly 6 for installing 3D printing head, main body support structure 5 and drive motor assembly 4; The main body support structure 5 includes a middle support plate 51, a support column 52 and a bottom support frame 53, the upper end of the support column 52 is vertically connected to the middle support plate 51, and the lower end is vertically connected to the bottom support frame 53; The X axis transmission assembly 1 and Y axis transmission assembly 2 are respectively fixed below and above the middle support plate 51, and the Z axis transmission assembly 3 is fixed below the middle support plate 51 and inside the bottom support frame 53; The drive motor assembly 4 includes X axis motor 41, Y axis motor 42, Z axis motor 43, motor synchronous pulley 44 and motor isolation column 45, the X axis motor 41 and the Y axis motor 42 are respectively installed below the middle support plate 51 and respectively placed inside the support column 52, and the Z axis motor 43 is installed inside the lower end of the support column 52.

[0058] The X axis transmission assembly 1 includes X axis synchronous assembly 11 and X axis guide rail assembly 12; The X axis synchronous assembly 11 includes X axis synchronous belt 111, X axis synchronous pulley 112, X axis synchronous idler 113, synchronous pulley isolation column 114, fixed screw 115 and X axis tensioning structure 116; The X axis guide rail assembly 12 includes Y optical axis 121, X axis linear guide rail 122, X axis guide rail slider 123, X axis slider connecting piece 124 and X axis synchronous belt pressing strip 125; The X axis synchronous belt 111 is composed of X axis synchronous belt outer section 1111 and X axis synchronous belt inner section 1112, and the X axis synchronous assembly 11 and the X axis guide rail assembly 12 are connected with each other through the X axis synchronous belt 111 and the X axis synchronous belt pressing strip 125.

[0059] The Y axis transmission assembly 2 includes Y axis synchronous assembly 21 and Y axis guide rail assembly 22; The Y axis synchronous assembly 21 includes Y axis synchronous belt 211, Y axis synchronous pulley 212, Y axis synchronous idler 213, synchronous pulley isolation column 214, fixed screw 215 and Y axis tensioning structure 216; The Y axis guide rail assembly 22 includes X optical axis 221, Y axis linear guide rail 222, Y axis guide rail slider 223, Y axis slider connecting piece 224 and Y axis synchronous belt pressing strip 225; The Y axis synchronous belt 211 is composed of Y axis synchronous belt outer section 2111 and Y axis synchronous belt inner section 2112, and the Y axis synchronous assembly 21 and the Y axis guide rail assembly 22 are connected with each other through the Y axis synchronous belt 211 and the Y axis synchronous belt pressing strip 225.

[0060] The Z-axis transmission assembly 3 comprises a Z-axis synchronous assembly 31, a Z-axis guide rail assembly 32 and a Z-axis lifting platform assembly 33; the Z-axis synchronous assembly 31 comprises a Z-axis synchronous belt 311, a Z-axis synchronous pulley 312 and a Z-axis tensioning structure 313; the Z-axis guide rail assembly 32 comprises a Z-axis light shaft 321, a Z-axis screw 322, a light shaft support seat 323, a linear bearing 324, a screw bearing 325, a screw nut 326, a screw bearing seat 327 and a locking nut 328; the Z-axis lifting platform assembly 33 comprises a printing platform 331, a platform support plate 332, a platform support frame 333, a anti-loosening short screw 334, an anti-loosening long screw 335 and a spring support anti-loosening structure 336; the spring support anti-loosening structure 336 comprises a bolt 3361, an isolation support column 3362, a spring 3363 and an adjusting nut 3364.

[0061] The X-axis motor 41 is fixed below the upper left corner of the middle support plate 51 through the motor isolation column 45, and the motor synchronous pulley 44 is connected with the output end of the X-axis motor 41; the Y-axis motor 42 is fixed below the upper right corner of the middle support plate 51, and the output end of the Y-axis motor 41 penetrates the middle support plate 51 and is connected with the motor synchronous pulley 44 above the middle support plate 51; the Z-axis motor 43 is fixed upside down at the inner side of the lower end of the support column 52 at the upper left corner, and the output end of the Z-axis motor 43 is connected with the motor synchronous pulley 44.

[0062] Embodiment 2.

[0063] Reference Figure 1 、 Figure 3 、 Figure 5 and Figure 7 , the application is used for the transmission structure of the 3D printer. When the X-axis axial motion is needed, the X-axis motor 41 drives the X-axis synchronous assembly 11 and the X-axis guide rail assembly 12, and drives the cross slider assembly 6 to move along the X-axis axial motion.

[0064] The X-axis synchronous component 11, the X-axis tension structure 116 is fixed to the right below the middle support plate 51, the X-axis synchronous pulley 112 is fixed to the four corners below the middle support plate 51 under the cooperation of the synchronous pulley isolation column 114 and the fixed screw 115, the X-axis synchronous idler 113 is fixed to the upper left corner, the lower left corner and the lower right corner below the middle support plate 51 under the cooperation of the synchronous pulley isolation column 114 and the fixed screw 115; The X-axis synchronous belt 111 is connected in turn X-axis tension structure 116, the X-axis synchronous pulley 112 of the lower right corner, the X-axis synchronous pulley 112 of the lower left corner, the X-axis synchronous pulley 112 of the upper left corner, the X-axis synchronous idler 113 of the upper left corner, the motor synchronous pulley 44, the X-axis synchronous pulley 112 of the upper right corner, forming the X-axis synchronous belt outer section 1111; The X-axis synchronous belt 111 is connected in turn X-axis tension structure 116, the X-axis synchronous idler 113 of the lower right corner, the X-axis synchronous idler 113 of the lower left corner, the X-axis synchronous idler 113 of the upper left corner, the X-axis synchronous pulley 112 of the upper right corner, forming the X-axis synchronous belt inner section 1112; The X-axis synchronous belt outer section 1111 and the X-axis synchronous belt inner section 1112 are parallel to each other, the transmission direction is opposite, forming a complete closed loop of the X-axis synchronous belt 111.

[0065] The X-axis guide rail assembly 12, the Y optical axis 121 penetrates the cross slide block assembly 6, both ends of the Y optical axis 121 are fixed with one X-axis slide block connector 124 respectively, each X-axis slide block connector 124 is installed with one X-axis synchronous belt pressing strip 125, each X-axis slide block connector 124 is installed on one X-axis guide rail slide block 123, each X-axis guide rail slide block 123 is installed on one X-axis linear guide rail 122, the X-axis linear guide rail 122 is parallel and symmetrical to the two inner edges of the middle support plate 51 opposite to each other, and is fixedly installed below the middle support plate 51.

[0066] Further, one of the X-axis synchronous belt pressing strips 125 is connected with the X-axis synchronous belt outer section 1111 and is locked at the outer side interface of one of the X-axis slide block connectors 124; the other X-axis synchronous belt pressing strip 125 is connected with the X-axis synchronous belt inner section 1112 and is locked at the inner side interface of the other X-axis slide block connector 124.

[0067] Further, the X-axis motor 41 drives the X-axis synchronous belt 111 to move, the X-axis synchronous belt 111 drives the X-axis synchronous belt pressing strip 125 to move, the X-axis synchronous belt pressing strip 125 cooperates with the X-axis slide block connector 124, the X-axis guide rail slide block 123 and the Y optical axis 121 to move in the same direction, and drives the cross slide block assembly 6 to move along the X-axis.

[0068] Embodiment 3.

[0069] With reference to Figure 1 , Figure 2 , Figure 4 and Figure 6 , the application is a transmission structure for a 3D printer. When Y-axis axial movement is required, the Y-axis motor 42 drives the Y-axis synchronous assembly 21 and the Y-axis guide rail assembly 22, driving the cross slider assembly 6 to move axially along the Y-axis.

[0070] In the Y-axis synchronous assembly 21, the Y-axis tensioning structure 216 is fixed to the upper side above the middle support plate 51, the Y-axis synchronous pulleys 212 are each fixed to the upper left corner, the lower left corner, and the lower right corner above the middle support plate 51 under the cooperation of the synchronous pulley isolation columns 214 and the fixing screws 215, and the Y-axis synchronous idlers 213 are each fixed to the upper left corner, the lower left corner, and the lower right corner above the middle support plate 51 under the cooperation of the synchronous pulley isolation columns 214 and the fixing screws 215; the Y-axis synchronous belt 211 is connected in sequence to the Y-axis tensioning structure 216, the Y-axis synchronous pulley 212 at the upper left corner, the Y-axis synchronous pulley 212 at the lower left corner, the Y-axis synchronous pulley 212 at the lower right corner, and the motor synchronous pulley 44 at the upper right corner, forming a Y-axis synchronous belt outer section 2111; the Y-axis synchronous belt 211 is connected in sequence to the Y-axis tensioning structure 216, the Y-axis synchronous idler 213 at the upper left corner, the Y-axis synchronous idler 213 at the lower left corner, the Y-axis synchronous idler 213 at the lower right corner, and the motor synchronous pulley 44 at the upper right corner, forming a Y-axis synchronous belt inner section 2112; the Y-axis synchronous belt outer section 2111 and the Y-axis synchronous belt inner section 2112 are parallel to each other and have opposite transmission directions, forming a complete closed loop of the Y-axis synchronous belt 211.

[0071] In the Y-axis guide rail assembly 22, the X-axis 221 passes through the cross slider assembly 6, and the two ends of the X-axis 221 are each fixed with one Y-axis slider connecting piece 224, each Y-axis slider connecting piece 224 is installed with one Y-axis synchronous belt pressing strip 225, each Y-axis slider connecting piece 224 is installed on one Y-axis guide rail slider 223, each Y-axis guide rail slider 223 is installed on one Y-axis linear guide rail 222, the Y-axis linear guide rail 222 is perpendicular to the X-axis linear guide rail 122, and at the same time, the other two inner edges of the middle support plate 51 are parallel and symmetrical to each other and are fixedly installed above the middle support plate 51.

[0072] Further, one of the Y-axis synchronous belt pressing strips 225 is connected with the outer section 2111 of the Y-axis synchronous belt and locked at the outer side interface of one of the Y-axis slider connecting pieces 224; the other Y-axis synchronous belt pressing strip 225 is connected with the inner section 2112 of the Y-axis synchronous belt and locked at the inner side interface of the other Y-axis slider connecting piece 224.

[0073] Further, the Y-axis motor 42 drives the movement of the Y-axis synchronous belt 211, which drives the movement of the Y-axis synchronous belt pressing strip 225, which moves in the same direction with the Y-axis slider connecting piece 224, the Y-axis guide rail slider 223 and the X-ray axis 221, thereby driving the movement of the cross slider assembly 6 along the Y-axis.

[0074] Embodiment 4.

[0075] Reference Figure 1 And Figures 8-13 When the Z-axis needs to move axially, the Z-axis motor 43 drives the movement of the Z-axis synchronous assembly 31 and the Z-axis guide rail assembly 32, thereby driving the movement of the Z-axis lifting platform assembly 33 along the Z-axis.

[0076] In the Z-axis synchronous assembly 31, two Z-axis synchronous pulleys 312 are respectively installed at the lower left corner and the upper right corner of the inner side of the bottom support frame 53 and connected with two Z-axis lead screws 322; the Z-axis tensioning structure 313 is fixed to the top surface of the inner side of the bottom support frame 53 and located between the Z-axis synchronous pulley 312 at the lower left corner and the motor synchronous pulley 44; the Z-axis synchronous belt 311 is connected in sequence with the motor synchronous pulley 44, the Z-axis tensioning structure 313, the Z-axis synchronous pulley 312 at the upper right corner, the Z-axis tensioning structure 313, the Z-axis synchronous pulley 312 at the lower left corner, and the motor synchronous pulley 44, forming a complete closed loop of the Z-axis synchronous belt 311; the Z-axis synchronous belt 311 connected between the Z-axis synchronous pulley 312 at the upper right corner and the Z-axis tensioning structure 313 is perpendicular to the Z-axis synchronous belt 311 connected between the Z-axis synchronous pulley 312 at the lower left corner and the motor synchronous pulley 44.

[0077] In the Z-axis guide rail assembly 32, the Z-axis lead screw 322 penetrates the lead screw nut 326 and is threadedly connected with the lead screw nut 326, one end of the Z-axis lead screw 322 is sleeved with the lead screw bearing 325, penetrates vertically and is fixed below the middle support plate 51, the other end of the Z-axis lead screw 322 penetrates vertically the bottom support frame 53, is connected with the lead screw bearing seat 327, and is locked with the locking nut 328, the number of the Z-axis lead screw 322 is 1-4; the lead screw bearing seat 327 is installed on the inner top surface of the bottom support frame 53; the four Z-axis light shafts 321 penetrate vertically the linear bearing 324 and the bottom support frame 53 respectively, the two ends of the Z-axis light shaft 321 are locked with the light shaft support seat 323 and are fixed below the middle support plate 51 and on the inner top surface of the bottom support frame 53 respectively.

[0078] In the Z-axis lifting platform assembly 33, the platform support plate 332 is connected with the platform support frame 333 up and down and is locked with the anti-loosening short screw 334; the printing platform 331 is fixed above the platform support frame 333 and is parallel to the platform support plate 332; the bolt 3361 penetrates vertically from top to bottom the printing platform 331, the isolation support column 3362, the spring 3363 and the platform support frame 333, and is locked with the adjusting nut 3364, the bolt 3361, the isolation support column 3362 and the spring 3363 are located between the printing platform 331 and the platform support frame 333, and the adjusting nut 3364 is located below the platform support frame 333, which constitute the spring support anti-loosening structure 336.

[0079] Further, under the position matching of the Z-axis tensioning structure 313, the wrap angle between the Z-axis synchronous pulley 312, the motor synchronous pulley 44 and the Z-axis synchronous belt 311 can be increased, and the transmission efficiency and stability can be improved.

[0080] Further, the platform support plate 332 is connected with the lead screw nut 326 and the linear bearing 324 respectively and is locked from bottom to top with the anti-loosening long screw 335.

[0081] Further, the spring support anti-loosening structure 336 can reduce the deformation amount of the printing platform 331 in the Z-axis axial direction and reduce the frequency of subsequent leveling of the 3D printer after use.

[0082] Further, the Z-axis motor 43 drives the Z-axis synchronous belt 311 to move, the Z-axis synchronous belt 311 drives the Z-axis synchronous pulley 312 to rotate, the Z-axis synchronous pulley 312 drives the Z-axis screw 322 to rotate spirally, and the Z-axis screw 322 drives the screw nut 326 to move in the same direction with the platform support plate 332, the platform support frame 333 and the printing platform 331, so as to move along the Z-axis axially guided by the Z-axis optical axis 321.

[0083] Further, when the platform support plate 332 moves axially downward along the Z-axis, it can be in the same horizontal plane with the upper end surface of the bottom support frame 53.

[0084] Embodiment 5.

[0085] Reference Figures 1-13 The 3D printer described in the present application is a desktop 3D printer, which comprises a 3D printing head 7, a functional module 8 and the 3D printer transmission structure. The 3D printing head 7 is arranged on the cross slide assembly 6 and is used for heating and extruding a wire material to print a model; the functional module 8 is installed on the inner side of the bottom support frame 53 and is used for managing the whole process of the operation of the 3D printer.

[0086] The installation process of embodiment 5 comprises the following steps.

[0087] First step: the middle support plate 51 is connected with the X-axis transmission assembly 1, the Y-axis transmission assembly 2, the Z-axis transmission assembly 3, the main body support structure 5 and the driving motor assembly 4, which are main parts of the 3D printer described in the present application, and the parts must be processed with high precision; taking the middle support plate 51 as the installation reference, the X-axis motor 41 and the Y-axis motor 42 are first installed at the corresponding positions below the middle support plate 51 respectively, and the X-axis synchronous assembly 11 and the Y-axis synchronous assembly 21 are simultaneously installed below and above the middle support plate 51 respectively; secondly, the Y-axis optical axis 121 and the X-axis optical axis 221 are perpendicular to each other and respectively penetrate through the cross slide assembly 6, and the X-axis guide rail assembly 12 and the Y-axis guide rail assembly 22 are simultaneously installed below and above the middle support plate 51 respectively, and the X-axis synchronous belt pressing strip 125 and the Y-axis synchronous belt pressing strip 225 are respectively used to lock the X-axis synchronous belt 111 and the Y-axis synchronous belt 211, so as to complete the installation of the X-axis transmission assembly 1 and the Y-axis transmission assembly 2.

[0088] Second step: the upper ends of four support columns 52 are vertically fixed at the corresponding installation positions below the middle support plate 51, and the lower ends of the support columns 52 are connected and fixed with the bottom support frame 53.

[0089] Third step: the Z-axis transmission assembly 3 is fixed below the middle support plate 51 and inside the bottom support frame 53. First, assemble the Z-axis lifting platform assembly 33; second, vertically install the Z-axis guide rail assembly 32 below the middle support plate 51 and inside the bottom support frame 53, and synchronously vertically penetrate the sleeve of the Z-axis lifting platform assembly 33; the Z-axis lifting platform assembly 33 is located below the middle support plate 51 and above the bottom support frame 53, and is parallel to the plane and can slide up and down.

[0090] Fourth step: install the Z-axis synchronous assembly 31 in the corresponding position inside the bottom support frame 53, and the Z-axis motor 43 is fixed upside down inside the lower end of the left upper support column 52, the output end of the Z-axis motor 43 is locked and connected with the motor synchronous pulley 44, the Z-axis synchronous pulley 312 is locked and connected with the Z-axis screw 322, and the Z-axis synchronous belt 311 is connected around, completing the transmission connection of the Z-axis synchronous assembly 31 and the Z-axis guide rail assembly 32.

[0091] Fifth step: set the 3D printing head 7 on the cross slider assembly 6, and install the function module 8 inside the bottom support frame 53.

[0092] Sixth step: check the installation results of the first to fifth steps to ensure that each installation index meets the quality requirements.

[0093] The above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes or variations. Any modification, equivalent replacement or improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transmission structure of a 3D printer, characterized by, The application relates to a 3D printing device, which comprises an X-axis transmission assembly, a Y-axis transmission assembly, a Z-axis transmission assembly, a cross slider assembly for mounting a 3D printing head, a main body support structure and a driving motor assembly; the main body support structure comprises a middle support plate, a support column and a bottom support frame; the middle support plate is used as an installation reference, and the X-axis transmission assembly and the Y-axis transmission assembly or the Y-axis transmission assembly and the X-axis transmission assembly are mounted below and above the middle support plate respectively, and meanwhile, the support column and the Z-axis transmission assembly are connected below the middle support plate; the upper end of the support column is vertically connected with the middle support plate, and the lower end of the support column is vertically connected with the bottom support frame; the Z-axis transmission assembly is fixed below the middle support plate and inside the bottom support frame; The X-axis transmission assembly comprises an X-axis synchronous assembly and an X-axis guide rail assembly; the X-axis synchronous assembly comprises an X-axis synchronous belt, an X-axis synchronous belt pulley, an X-axis synchronous idler pulley, a synchronous pulley isolation column, a fixing screw and an X-axis tensioning structure; the X-axis guide rail assembly comprises a Y optical axis, an X-axis linear guide rail, an X-axis guide rail slider, an X-axis slider connecting piece and an X-axis synchronous belt pressing strip; the X-axis synchronous belt is composed of an X-axis synchronous belt outer section and an X-axis synchronous belt inner section; the X-axis synchronous assembly and the X-axis guide rail assembly are connected with each other through the X-axis synchronous belt and the X-axis synchronous belt pressing strip; The Y-axis transmission assembly comprises a Y-axis synchronous assembly and a Y-axis guide rail assembly; the Y-axis synchronous assembly comprises a Y-axis synchronous belt, a Y-axis synchronous belt pulley, a Y-axis synchronous idler pulley, a synchronous pulley isolation column, a fixing screw and a Y-axis tensioning structure; the Y-axis guide rail assembly comprises an X optical axis, a Y-axis linear guide rail, a Y-axis guide rail slider, a Y-axis slider connecting piece and a Y-axis synchronous belt pressing strip; the Y-axis synchronous belt is composed of a Y-axis synchronous belt outer section and a Y-axis synchronous belt inner section; the Y-axis synchronous assembly and the Y-axis guide rail assembly are connected with each other through the Y-axis synchronous belt and the Y-axis synchronous belt pressing strip; The Z-axis transmission assembly comprises a Z-axis synchronous assembly, a Z-axis guide rail assembly and a Z-axis lifting platform assembly; the Z-axis synchronous assembly comprises a Z-axis synchronous belt, a Z-axis synchronous belt pulley and a Z-axis tensioning structure; the Z-axis guide rail assembly comprises a Z optical axis, a Z-axis screw rod, an optical axis support seat, a linear bearing, a screw rod bearing, a screw rod nut, a screw rod bearing seat and a locking nut; The Z-axis lifting platform assembly comprises a printing platform, a platform support plate, a platform support frame, an anti-loosening short screw, an anti-loosening long screw and a spring support anti-loosening structure; the spring support anti-loosening structure comprises a bolt, an isolation support column, a spring and an adjusting nut; The driving motor assembly comprises an X-axis motor, a Y-axis motor, a Z-axis motor, a motor synchronous belt pulley and a motor isolation column.

2. The transmission structure of the 3D printer according to claim 1, wherein, The X-axis synchronous belt outer section and the X-axis synchronous belt inner section are parallel to each other and have opposite transmission directions; the Y-axis synchronous belt outer section and the Y-axis synchronous belt inner section are parallel to each other and have opposite transmission directions.

3. The transmission structure of the 3D printer according to claim 1, wherein, The two inner edges of the X-axis linear guide rails opposite to the middle support plate are parallel and symmetrical to each other and are fixedly installed on one side of the middle support plate; the Y-axis linear guide rails are perpendicular to the X-axis linear guide rails and are parallel and symmetrical to each other with the other two inner edges opposite to the middle support plate and are fixedly installed on the other side of the middle support plate.

4. The transmission structure of the 3D printer according to claim 1, wherein, One of the X-axis synchronous belt pressing strips is connected with the outer section of the X-axis synchronous belt and is locked at the outer side interface of one of the X-axis slider connectors; the other X-axis synchronous belt pressing strip is connected with the inner section of the X-axis synchronous belt and is locked at the inner side interface of the other X-axis slider connector; the transmission directions of the outer section of the X-axis synchronous belt and the inner section of the X-axis synchronous belt are opposite, and the two X-axis slider connectors move in the same direction along the X-axis; the Y-axis synchronous belt pressing strip, the Y-axis synchronous belt and the Y-axis slider connector are the same.

5. The transmission structure of the 3D printer according to claim 1, wherein, The X-axis motor and the Y-axis motor are installed below the middle support plate and are respectively arranged inside the support column, or are installed above the middle support plate, or are respectively installed above or below the middle support plate; the Z-axis motor is installed inside the lower end of the support column.

6. The transmission structure of the 3D printer according to claim 1, wherein, The Z-axis screw rod is vertically arranged at the positions opposite to each other of the platform support plate.

7. The transmission structure of the 3D printer according to claim 1, wherein, When the platform support plate moves axially downward along the Z-axis, the upper end surface of the bottom support frame can be in the same horizontal plane.

8. The transmission structure of the 3D printer according to claim 1, wherein, The bolt vertically penetrates the printing platform, the isolation support column, the spring and the platform support frame from top to bottom, and is locked by the adjusting nut, the bolt, the isolation support column and the spring are located between the printing platform and the platform support frame, and the adjusting nut is located below the platform support frame, to form the spring support anti-loose structure.

9. The transmission structure of the 3D printer according to claim 1, wherein, The Z-axis synchronous belt connected around the Z-axis synchronous pulley and the Z-axis tensioning structure at the upper right corner is perpendicular to the Z-axis synchronous belt connected around the Z-axis synchronous pulley and the motor synchronous pulley at the lower left corner, and under the cooperation of the position of the Z-axis tensioning structure, the wrap angle between the Z-axis synchronous pulley, the motor synchronous pulley and the Z-axis synchronous belt can be increased.

10. A 3D printer characterized by, The 3D printer transmission structure comprises a 3D printing head, a functional module and the 3D printer transmission structure of any one of claims 1-9, the 3D printing head is arranged on the cross slider assembly and is used for heating and extruding a wire material and printing a model; the functional module is installed inside the bottom support frame, and the functional module is used for managing the whole process of the operation of the 3D printer.

Images