3D printer and 3D printing system

Abstract

The utility model relates to a 3D printer and a 3D printing system. The printer comprises a base, a cross beam, two optical shafts and a lead screw. The polished shafts and the lead screws are connected between the bases and the cross beams; the beam is provided with a connecting adjusting piece corresponding to the optical shaft, and the optical shaft is connected with the beam through the connecting adjusting piece and can rotate relative to the connecting adjusting piece. Each lead screw is connected with one optical axis through one sliding block assembly, the sliding block assemblies can slide along the lead screws, the two sliding block assemblies are connected through a transverse rod, and the transverse rod is used for vertically moving from one end of the optical axis to the other end of the optical axis along the reference plane in the vertical leveling stage of the optical axis so that the two optical axes can swing to respective corresponding target positions. Through the arrangement of the connecting adjusting piece, when the optical axis is assembled, the deflection angle of the optical axis relative to the base can be flexibly adjusted, and therefore the perpendicularity of the optical axis can be conveniently adjusted. Namely, size deviation accumulation generated when the optical axis, the base and the cross beam are assembled is absorbed through the connecting adjusting piece.

Description

Technical Field

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

[0002] The printing principle of a 3D printer is: using FDM technology (fused deposition modeling technology, also known as fused filament deposition modeling technology), when the print head moves to a preset position relative to the gantry frame, the filamentary hot melt material is heated and melted, and extruded through the nozzle of the print head, and stacked layer by layer from bottom to top on the bottom plate of the gantry frame to build an object. Since the printer works by stacking from top to bottom, the verticality of its Z-axis direction (that is, the extension direction of the optical axis) plays a vital role in the operation of the printer.

[0003] In the prior art, the optical axis in the Z-axis direction is usually locked by tightening screws. However, due to the accumulation of dimensional deviations during assembly, the optical axis after assembly is not necessarily vertical. At this time, if the verticality of the optical axis is to be adjusted, it is necessary to repeatedly adjust the tightening degree of each screw, which is not only laborious but also time-consuming. Utility Model Content

[0004] The present application provides a 3D printer, which optimizes the connection between the optical axis and the base and the crossbeam in a targeted manner, and uses the connection adjustment member to absorb the accumulated dimensional deviation generated during assembly, thereby ensuring the verticality of the optical axis and improving the assembly efficiency. In addition, the present application also provides a 3D printing system equipped with the 3D printer, which specifically includes the following solutions:

[0005] In a first aspect, the present application provides a 3D printer, comprising a base, a crossbeam, two optical axes and two lead screws; the base and the crossbeam are arranged at intervals, and one end of each of the two optical axes is connected to the base;

[0006] The crossbeam is provided with a connecting and adjusting member corresponding to each optical axis, the other end of each optical axis is connected to the crossbeam through the corresponding connecting and adjusting member, and each optical axis is rotatable relative to the corresponding connecting and adjusting member;

[0007] Each of the two screw rods is rotatably connected between the base and the crossbeam, and each screw rod is connected to an optical axis through a slider assembly. The slider assembly can slide along the length direction of the screw rod, and the two slider assemblies are connected by a cross bar. The cross bar is used to move vertically from one end of the optical axis to the other end along the reference plane during the vertical leveling stage of the optical axis, so that the two optical axes swing to their respective corresponding target positions.

[0008] In this embodiment, a base is provided for fixing the optical axis and the screw rod, the optical axis and the screw rod are provided as a movable guide frame for the print head along the Z axis, and a cross bar is provided as a movable guide frame for the print head along the X axis. It should be noted that the print head can be slidably connected to the cross bar and slide along the axial direction of the cross bar. The opposite ends of the cross bar are connected to the screw rod via a sliding connection assembly, and each optical axis is connected to each screw rod via the slider assembly, so that when the screw rod rotates, the cross bar can be driven to drive the print head to move along the length direction of the optical axis. A crossbeam is provided to connect the two optical axes to improve the structural stability of the 3D printer of the present application, thereby improving the printing effect.

[0009] Furthermore, the present application also sets a connection adjustment member on the crossbeam, sets one end of the optical axis to be connected to the connection adjustment member, and allows the optical axis to rotate relative to the connection adjustment member, so that when assembling the optical axis, the deflection angle of the optical axis relative to the base can be flexibly adjusted, which is conducive to adjusting the verticality of the optical axis. That is, the present application uses the connection adjustment member to absorb the accumulated dimensional deviations generated when the optical axis is assembled with the base and the crossbeam, thereby improving the matching accuracy between the optical axis and the crossbeam and the base, ensuring the verticality of the optical axis, and at the same time, there is no need for the operator to repeatedly adjust the position of the optical axis, which can reduce labor intensity and improve the assembly efficiency of the 3D printer of the present application. For example, in the vertical leveling stage of the optical axis, the crossbar can be moved vertically from one end of the optical axis to the other end by using an external fixture. The external fixture provides a reference plane for the optical axis, and the two optical axes are swung to the corresponding target position to ensure the verticality of the optical axis. Compared with the prior art of adjusting the tightness of each screw, the solution of the present application is simpler, more efficient, and more accurate.

[0010] In one embodiment, the two optical axes include a first optical axis, and the connection adjustment member corresponding to the first optical axis includes a connection block fixed to the crossbeam, the connection block has a receiving hole, and the aperture of the receiving hole is larger than the diameter of the optical axis.

[0011] In this embodiment, a receiving hole is provided on the connecting block fixed to the crossbeam, and the diameter of the receiving hole is made larger than the diameter of the first optical axis to ensure that the first optical axis can rotate relative to the crossbeam after extending into the receiving hole, so as to adjust the verticality of the first optical axis.

[0012] In one embodiment, the 3D printer further fills a fixing glue in the gap between the receiving hole and the first optical axis to keep the optical axis at the target position.

[0013] In this embodiment, after the vertical leveling stage of the optical axis is completed, that is, when the first optical axis is perpendicular to the beam, the first optical axis is fixed to the beam in a preset posture by filling fixing glue in the gap between the receiving hole and the first optical axis.

[0014] In one embodiment, the connection adjustment member is detachably fixed to the crossbeam.

[0015] In this embodiment, by providing a detachable connection between the connecting adjustment member and the crossbeam, when the optical axis and the crossbeam are damaged, the connecting adjustment member can be removed and replaced, thereby improving the recycling rate of the parts of the 3D printer of this application.

[0016] In one embodiment, the base includes a limiting hole and a limiting member corresponding to each optical axis. The limiting member is arranged on the inner wall of the limiting hole. Each optical axis extends into the corresponding limiting hole. The limiting member abuts against the outer periphery of each optical axis to limit the swing angle of one end of each optical axis connected to the base.

[0017] In this embodiment, a limiting hole is provided in the base for installing the optical axis. A limiting member is provided on the inner wall of the limiting hole, and the limiting member is made to abut against the periphery of the optical axis. The limiting member can limit the swing angle of the optical axis during the vertical leveling stage of the optical axis, thereby playing a role of pre-positioning.

[0018] In one embodiment, the limiting member includes at least three protrusions, which are arranged at intervals along the circumference of the limiting hole, and each protrusion extends radially toward the optical axis and contacts the optical axis to limit the swing angle of the optical axis.

[0019] In this embodiment, the limiting member includes at least three protrusions, that is, at least three protrusions are protruded on the inner wall of the limiting hole and are arranged at intervals along the circumference of the limiting hole. By setting each protrusion to support the periphery of the optical axis, the swing angle of the optical axis can be limited by a simple protrusion structure.

[0020] In one embodiment, the number of the protrusions is three, and the angle between two adjacent protrusions is 120°.

[0021] In one embodiment, along the length direction of the optical axis, the distance from the end of the optical axis extending into the limiting hole to the protrusion accounts for 6% to 10% of the length of the optical axis.

[0022] In one embodiment, the limiting member includes an elastic ring, which is sleeved on the periphery of the optical axis and contacts the optical axis to limit the swing angle of the optical axis.

[0023] In this embodiment, the limiting member includes an elastic ring, that is, an elastic ring is provided on the inner wall of the limiting hole, and the optical axis passes through the elastic ring. The elastic ring is used to limit the swing angle of the optical axis, which is beneficial to the processing of the limiting member.

[0024] In one embodiment, a baffle is provided in the limiting hole, the baffle is located on the side of the limiting member away from the crossbeam, and the baffle contacts the end of the optical axis to limit the axial displacement of the optical axis.

[0025] In this embodiment, a baffle is provided in the limiting hole and is provided on the side of the limiting member away from the crossbeam to limit the axial displacement of the optical axis, thereby preventing the optical axis from slipping during the vertical lifting and leveling stage.

[0026] In one embodiment, a sealing ring is sleeved on the periphery of one end of the first optical axis close to the connecting block, and the sealing ring is used to seal the receiving hole to prevent the fixing glue from flowing out.

[0027] In this embodiment, a sealing ring is provided to seal the receiving hole, so as to prevent the fixing glue from flowing out in a vertical direction when the fixing glue is filled in the receiving hole.

[0028] In one embodiment, the slider assembly includes a sliding bearing and a sliding block. The sliding bearing is sleeved on the periphery of the optical axis, and the sliding block is sleeved on the periphery of the screw rod. The sliding bearing and the sliding block are mutually supported.

[0029] In this embodiment, a sliding bearing and a sliding block are respectively sleeved on the periphery of the optical axis and the screw rod, and the sliding bearing and the sliding block are arranged to abut against each other, so as to realize the connection between the screw rod and the optical axis, and it is also beneficial to the assembly of the optical axis and the bracket of the 3D printer of the present application.

[0030] In one embodiment, the 3D printer is further provided with a driving wheel, two driven wheels and a synchronous belt in the base, each screw rod is connected to a driven wheel, the driving wheel is connected to the two driven wheels via a synchronous belt, and the driving wheel is used to drive the two driven wheels to rotate synchronously.

[0031] In this embodiment, a driven wheel is connected to a screw rod, and a driving wheel is connected to two driven wheels through a synchronous belt, so that one driving wheel can drive two screw rods to rise and fall synchronously, thereby reducing the driving cost of the 3D printer of this application.

[0032] In one embodiment, the 3D printer further includes an idler wheel, a fixing member and an elastic member, wherein the fixing member is fixedly disposed on the base, the idler wheel is slidably disposed on the base, and the elastic member is disposed between the idler wheel and the fixing member for adjusting the relative position between the idler wheel and the fixing member.

[0033] In this embodiment, an idler wheel, a fixing member and an elastic member are arranged in coordination, the fixing member is fixed to the base, the synchronous belt is connected to the idler wheel, and the elastic member is used to adjust the relative position between the idler wheel and the fixing member to achieve tension adjustment of the synchronous belt.

[0034] In a second aspect, the present application provides a 3D printing system, which includes a feeding device and a 3D printer as in any of the above embodiments, wherein the feeding device is used to provide printing materials to the 3D printer.

[0035] It can be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A scenario application diagram of a 3D printing system provided in one embodiment of the present application;

[0037] Figure 2 This is a schematic diagram of the structure of a 3D printer provided in one embodiment of the present application;

[0038] Figure 3 A schematic cross-sectional structure diagram of a 3D printer provided in one embodiment of the present application;

[0039] Figure 4 A partial structural schematic diagram of a 3D printer provided in one embodiment of the present application;

[0040] Figure 5 for Figure 4 A partial enlarged view of the middle A;

[0041] Figure 6 This is a schematic diagram of the structure of an optical axis and a connecting adjustment member provided in an embodiment of the present application;

[0042] Figure 7 This is a structural schematic diagram of an optical axis and a connecting adjustment member provided in another embodiment of the present application;

[0043] Figure 8 for Figure 4 A partial enlarged view of point B in the middle;

[0044] Fig. 9 A top view of an optical axis support in a base provided in an embodiment of the present application;

[0045] Fig.10 A cross-sectional view of an optical axis support in a base provided in an embodiment of the present application;

[0046] Fig.11 A schematic diagram of the internal structure of a base provided in one embodiment of the present application;

[0047] Fig.12 This is a schematic diagram of the structure of a tensioning mechanism provided in one embodiment of the present application.

[0048] Figure numbers: 200-3D printing system; 201-feeding device; 100-3D printer; 10-print head; 20-printing platform bracket; 30-movement mechanism; 40-base; 41-optical axis support; 42-limiting hole; 43-limiting member; 431-protrusion; 44-baffle; 50-Z-axis bracket; 51-through hole; 52-screw rod; 53-optical axis; 531-first optical axis; 60-crossbeam; 61-connection Adjusting member; 611-first connecting adjusting member; 62-connecting block; 621-receiving hole; 63-adjusting block; 631-adjusting hole; 632-glue injection hole; 64-sealing ring; 70-cross bar; 71-sliding block assembly; 72-sliding bearing; 73-sliding block; 80-driving assembly; 81-driving wheel; 82-driven wheel; 83-synchronous belt; 90-tensioning mechanism; 91-idling wheel; 92-fixing member; 93-elastic member. DETAILED DESCRIPTION

[0049] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be used to implement. The serial numbers for the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present application, unless otherwise specified, include direct and indirect connections (couplings). The directional terms mentioned in the present application, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including", "may include", "include", or "may include" used in this application indicate the existence of the corresponding functions, operations, elements, etc. disclosed, and do not limit one or more other functions, operations, elements, etc. In addition, the terms "including" or "include" indicate the existence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, and do not exclude the existence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof, and are intended to cover non-exclusive inclusions.

[0051] See also Figure 1 A scenario application diagram of a 3D printing system 200 provided in one embodiment of the present application is shown.

[0052] like Figure 1 As shown, the 3D printing system 200 of the present application includes a feeding device 201 and a 3D printer 100. Among them, the feeding device 201 is used to provide printing materials to the 3D printer 100. Specifically, the 3D printer 100 of the present application includes a print head 10, a printing platform (not shown in the figure) and a motion mechanism 30. Exemplarily, the printing platform can be slidably connected above the printing platform bracket 20. The motion mechanism 30 connects at least one of the print head 10 and the printing platform. During the movement of the motion mechanism 30, at least one of the print head 10 and the printing platform can be driven, so that a relative displacement occurs between the print head 10 and the printing platform. Exemplarily, the motion mechanism 30 may include a synchronous belt, a screw rod or a guide rail, etc., and the present application does not limit the specific form of the motion mechanism 30.

[0053] The print head 10 includes an extrusion component and a hot end. The extrusion component transports the printing material provided by the feeding device to the 3D printer 100 to the hot end. The hot end has a heating function. The hot end heats the printing material to a molten state and extrude the molten printing material onto the printing platform.

[0054] Exemplarily, the hot end includes a heat sink fin, a nozzle, and a throat located between the heat sink fin and the nozzle. The printing material passes through the heat sink fin, the throat, and the nozzle in sequence. Specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrude the molten printing material onto the printing platform. When the motion mechanism 30 moves along the printing path, the nozzle extrude the molten printing material layer by layer at different positions of the printing platform, thereby printing a three-dimensional object.

[0055] The extrusion assembly includes a driving wheel and a driven wheel arranged opposite to the driving wheel, and the printing material passes between the driving wheel and the driven wheel. The driving wheel rotates in a first direction to drive the printing material to be transported to the hot end; the driving wheel rotates in a second direction opposite to the first direction to drive the printing material back to the feeding device.

[0056] Combine the following Figure 2 and Fig.12 The structure of the 3D printer 100 of the present application is introduced.

[0057] like Figure 2 and Figure 3 As shown, Figure 2 This is a schematic structural diagram of a 3D printer 100 provided in one embodiment of the present application; Figure 3 Schematic diagram of the cross-sectional structure of a 3D printer 100 provided in one embodiment of the present application. In one embodiment, the 3D printer 100 of the present application includes a base 40, a Z-axis bracket 50, a crossbeam 60 and a crossbar 70. The base 40 and the crossbeam 60 are arranged at intervals in the vertical direction, and the printing platform bracket 20 is connected to the base 40. For example, the printing platform bracket 20 can be integrally formed with the base 40. There are two Z-axis brackets 50, and the two Z-axis brackets 50 are respectively fixed to the opposite ends of the base 40 along the X-axis direction, that is, they are arranged at the opposite sides of the printing platform bracket 20 along the X-axis direction, and the two Z-axis brackets 50 are also connected to the crossbeam 60. The base 40, the crossbeam 60 and the two Z-axis brackets 50 cooperate together to form the gantry frame of the 3D printer 100. The 3D printer 100 of the present application also includes a cross bar 70, which is connected between the two Z-axis brackets 50 and is located between the base 40 and the cross beam 60. The print head 10 is arranged on the cross beam 60 and can move along the X-axis direction relative to the cross bar 70, that is, the cross bar 70 can serve as an X-axis moving guide frame for the print head 10, thereby limiting the movement trajectory of the print head 10 along the X-axis direction.

[0058] Further, each Z-axis bracket 50 is provided with two through holes 51 arranged side by side along the X-axis direction, and a screw 52 and an optical axis 53 are respectively provided in the two through holes 51. The optical axis 53 is connected between the base 40 and the cross beam 60, and the screw 52 is rotatably connected between the base 40 and the cross beam 60. The 3D printer 100 of the present application also includes a slider assembly 71, and the number of the slider assemblies 71 is two, and each slider assembly 71 is sleeved between an optical axis 53 and a screw 52. It can also be understood that each screw 52 is connected to an adjacent optical axis 53 through a slider assembly 71. The two slider assemblies 71 are connected by a cross bar 70, that is, the opposite ends of the cross bar 70 are respectively connected to a slider assembly 71. When the screw 52 rotates, the slider assembly 71 can move along the length direction of the screw 52, ​​and can drive the cross bar 70 to move along the length direction of the screw 52. That is, the optical axis 53 and the screw rod 52 can be used as the Z-axis moving guide frame of the print head 10, which is used to limit the movement trajectory of the print head 10 along the Z-axis direction. The assembled optical axis 53 can play a role of shock absorption and guidance during the printing process to ensure the movement accuracy of the print head 10, thereby improving the printing effect. Or it can be understood that, in this embodiment, the screw rod 52 and the cross bar 70 can be used as the motion mechanism 30 of the present application, the cross bar 70 is connected to the print head 10, and the screw rod 52 and the cross bar 70 are connected, so that the print head 10 can be driven to move along the Z-axis direction and along the X-axis direction relative to the printing platform bracket 20, thereby printing the desired 3D model.

[0059] Furthermore, the cross beam 60 of the present application is also provided with a connection adjustment member 61, and the number of the connection adjustment members 61 is also two. Each optical axis 53 is provided with a corresponding connection adjustment member 61, and the top of the optical axis 53 is connected to the cross beam 60 through the connection adjustment member 61, and each optical axis 53 can also rotate relative to the corresponding connection adjustment member 61.

[0060] It can be understood that the top end of the optical axis 53 of the 3D printer 100 of the present application is connected to the crossbeam 60 through the connection adjustment member 61, and the optical axis 53 is arranged to be rotatable relative to the connection adjustment member 61, so that when the optical axis 53 is assembled, the deflection angle of the optical axis 53 relative to the base 40 can be flexibly adjusted, which is conducive to adjusting the verticality of the optical axis 53. That is, the present application absorbs the accumulated dimensional deviations generated when the optical axis 53 is assembled with the base 40 and the crossbeam 60 by using the connection adjustment member 61, thereby improving the matching accuracy between the optical axis 53 and the crossbeam 60 and the base 40, ensuring the verticality of the optical axis 53, and at the same time, there is no need for the operator to repeatedly adjust the position of the optical axis 53, which can reduce the labor intensity and improve the assembly efficiency of the 3D printer 100 of the present application. For example, in the vertical leveling stage of the optical axis 53, based on the connection between the two optical axes 53 and the crossbar 70 through the slider assembly 71, the crossbar 70 can be vertically moved from one end of the optical axis 53 to the other end by using an external fixture, and the external fixture provides a reference plane for the optical axis 53, so that the two optical axes 53 are straightened and swung to the corresponding target position to ensure the verticality of the optical axis 53. Compared with the prior art of adjusting the tightness of each screw, the solution of the present application is simpler, more efficient and more accurate.

[0061] For details, please refer to Figures 4 to 7 ,in Figure 4 A partial structural diagram of a 3D printer 100 provided in one embodiment of the present application; Figure 5 for Figure 4 A partial enlarged view of the middle A; Figure 6 This is a schematic structural diagram of an optical axis 53 and a connecting adjustment member 61 provided in an embodiment of the present application; Figure 7 It is a schematic structural diagram of an optical axis 53 and a connecting adjustment member 61 provided in another embodiment of the present application.

[0062] like Figures 3 to 7 In one embodiment, the two optical axes 53 include a first optical axis 531, and the connection adjustment member 61 corresponding to the first optical axis 531 is a first connection adjustment member 611. The first connection adjustment member 611 includes a connection block 62, and the connection block 62 is fixed to the crossbeam 60. The connection block 62 is also provided with a receiving hole 621, and the aperture of the receiving hole 621 is larger than the diameter of the first optical axis 531. The top end of the first optical axis 531 extends into the receiving hole 621, and can rotate relative to the connection block 62 in the receiving hole 621.

[0063] It can be understood that in this embodiment, a receiving hole 621 is provided on a connecting block 62 fixed to the crossbeam 60, and the aperture of the receiving hole 621 is made larger than the diameter of the first optical axis 531, so as to ensure that the first optical axis 531 can still rotate relative to the crossbeam 60 after extending into the receiving hole 621, so as to flexibly adjust the verticality of the first optical axis 531.

[0064] In one embodiment, the 3D printer 100 further fills a fixing glue (not shown) in the gap between the receiving hole 621 and the first optical axis 531 to keep the optical axis 53 at the target position. That is, when assembling the first optical axis 531, the bottom end of the first optical axis 531 can be movably connected with the base 40, and the top end of the first optical axis 531 extends into the receiving hole 621. After the vertical leveling stage of the first optical axis 531 is completed, that is, when the first optical axis 531 is perpendicular to the beam 60, the first optical axis 531 is fixed to the beam 60 in a preset posture by filling the fixing glue in the gap between the receiving hole 621 and the first optical axis 531, thereby ensuring the printing effect during the printing process of the 3D printer 100.

[0065] It should be noted that the fixing glue may include structural glue and instant glue. Since it takes a certain amount of time for the structural glue to cure, when the first optical axis 531 is adjusted to a vertical state, the instant glue may be filled in for preliminary fixation, and then the structural glue may be filled in the same position for permanent fixation, thereby ensuring the installation accuracy of the first optical axis 531.

[0066] In one embodiment, the connection adjustment member 61 is detachably fixed to the crossbeam 60. It can be understood that in this embodiment, by setting the connection adjustment member 61 to be detachably connected to the crossbeam 60, when the optical axis 53 and the crossbeam 60 are damaged, the connection adjustment member 61 can be removed and replaced, thereby improving the recycling rate of the parts of the 3D printer 100 of the present application.

[0067] In one embodiment, the screw rod 52 is also rotatably connected to the crossbeam 60 via the connecting adjusting member 61. Since the connecting adjusting member 61 is detachably mounted on the crossbeam 60, the recycling rate of the parts of the 3D printer 100 can also be improved. Figure 7 In the illustrated embodiment, the connection adjustment member 61 includes a connection block 62 and an adjustment block 63. The adjustment block 63 is inserted into the receiving hole 621 of the connection block 62 and is detachably fixed to the connection block 62. The adjustment block 63 includes an adjustment hole 631, the aperture of which is larger than the diameter of the optical axis 53, and the top of the optical axis 53 extends into the adjustment hole 631. Before the optical axis 53 is fixed by glue, the optical axis 53 can rotate relative to the adjustment block 63. A glue injection hole 632 is provided at the top of the adjustment block 63, and the glue injection hole 632 is used to inject fixing glue into the adjustment hole 631, so as to fix the optical axis 53 after the optical axis 53 is leveled. It can be understood that in this embodiment, by providing an adjustment block 63 that is detachably fixed to the connection block 62, the recycling rate of the parts of the 3D printer 100 can be further improved.

[0068] In one embodiment, a sealing ring 64 is sleeved around the periphery of the first optical axis 531 close to one end of the connecting block 62 , and the sealing ring 64 is used to seal the receiving hole 621 to prevent the fixing glue from flowing out, so as to prevent the fixing glue from flowing out in the vertical direction when the fixing glue is filled in the receiving hole 621 .

[0069] Please see Figures 8 to 10 ,in Figure 8 for Figure 4 A partial enlarged view of point B in the middle; Fig. 9 A top view of an optical axis support 41 in a base 40 provided in an embodiment of the present application; Fig.10 It is a cross-sectional view of an optical axis support 41 in a base 40 provided in an embodiment of the present application.

[0070] like Figures 2 to 10 In one embodiment, the base 40 is provided with two optical axis supports 41, and each optical axis support 41 is provided corresponding to an optical axis 53. Each optical axis support 41 includes a limiting hole 42 and a limiting member 43. The limiting member 43 is provided on the inner wall of the limiting hole 42, and the optical axis 53 extends into the corresponding limiting hole 42, and the limiting member 43 abuts against the periphery of the optical axis 53. It can be understood that the limiting hole 42 is provided in the optical axis support 41 for installing the optical axis 53. The limiting member 43 is provided on the inner wall of the limiting hole 42, and the limiting member 43 abuts against the periphery of the optical axis 53. The limiting member 43 can limit the swing angle of the optical axis 53 in the vertical leveling stage of the optical axis 53, and play a role of pre-positioning.

[0071] Specifically, in Fig. 9 In the illustrated embodiment, the limiting member 43 includes a protrusion 431, and the number of the protrusions 431 is three. The three protrusions 431 are arranged at intervals along the circumference of the limiting hole 42, and the angle between two adjacent protrusions 431 is 120°. Each protrusion 431 extends radially toward the optical axis 53 and contacts the optical axis 53 to limit the swing angle of the optical axis 53. It can be understood that the limiting member 43 provided in the form of a protrusion 431 is not only simple in structure, but also has a good pre-positioning effect. At the same time, the angle between two adjacent protrusions 431 is set to 120°, which can ensure the stability of the pre-positioning of the optical axis 53 and avoid uneven force on the bottom end of the optical axis 53.

[0072] It should be noted that the number and position of the protrusions 431 in the above implementation are only for exemplary purposes and do not represent the actual number and actual position of the protrusions 431 of the present application. That is, the number and position of the protrusions 431 in other embodiments of the present application can be adaptively adjusted according to the actual application scenario, and the present application does not specifically limit this. At the same time, the form of the limiter 43 of the present application includes but is not limited to the protrusion 431. For example, in another embodiment, the limiter 43 is configured as an elastic ring, which is sleeved on the periphery of the optical axis 53 and contacts the optical axis 53, and can also limit the swing angle of the optical axis 53.

[0073] In one embodiment, along the length direction of the optical axis 53, the distance between the end of the optical axis 53 extending into the limiting hole 42 and the protrusion 431 accounts for 6% to 10% of the length of the optical axis 53. It can be understood that in this embodiment, the distance between the bottom end of the optical axis 53 and the protrusion 431 accounts for 6% to 10% of the length of the optical axis 53, which can avoid the bottom of the optical axis 53 being too short from the protrusion 431, resulting in a large swing amplitude of the optical axis 53, thereby reducing the pre-positioning effect of the optical axis 53. At the same time, it is prevented that the bottom of the optical axis 53 is too long from the protrusion 431, resulting in a small swing amplitude of the optical axis 53, which is not conducive to adjusting the verticality of the optical axis 53.

[0074] exist Fig.10 In the illustrated embodiment, a baffle 44 is provided in the limiting hole 42, the baffle 44 is located on the side of the limiting member 43 away from the cross beam 60, and the baffle 44 contacts the bottom of the optical axis 53. It can be understood that the baffle 44 is provided on the side of the limiting member 43 away from the cross beam 60 to limit the axial displacement of the optical axis 53, thereby preventing the optical axis 53 from sliding off during the vertical lifting and leveling stage.

[0075] Furthermore, a gap hole is reserved between the baffle 44 and the inner wall of the limiting hole 42. After the numerical leveling stage of the optical axis 53 is completed, fixing glue can be injected into the limiting hole 42 from the bottom of the optical axis support 41 through the reserved gap hole to stabilize the optical axis 53 on the base 40 in a preset posture.

[0076] In one embodiment, a sealing ring 64 is also provided at one end of the limiting hole 42 close to the cross beam 60 , and the sealing ring 64 is used to seal the limiting hole 42 to prevent the fixing glue in the limiting hole 42 from flowing out.

[0077] Please look back Figure 3 and Figure 7In one embodiment, the slider assembly 71 includes a sliding bearing 72 and a sliding block 73. The sliding bearing 72 is sleeved on the periphery of the optical axis 53, and the sliding block 73 is sleeved on the periphery of the screw rod 52. The sliding bearing 72 and the sliding block 73 abut against each other. It can be understood that by arranging the sliding bearing 72 and the sliding block 73 to be sleeved on the peripheries of the optical axis 53 and the screw rod 52 respectively, and arranging the sliding bearing 72 and the sliding block 73 to abut against each other, the screw rod 52 is associated with the optical axis 53, and it is also beneficial to assemble the optical axis 53 and the bracket of the 3D printer 100 of the present application.

[0078] Please see Fig.11 , Fig.11 Schematic diagram of the internal structure of a base 40 provided in an embodiment of the present application.

[0079] like Fig.11 As shown, in one embodiment, the 3D printer 100 includes a driving assembly 80, which is disposed on the base 40 and is transmission-connected to the screw 52 to provide driving force to the screw 52. Specifically, the driving assembly 80 includes a driving wheel 81, a driven wheel 82 and a synchronous belt 83. There is one driving wheel 81 and two driven wheels 82. Each driven wheel 82 is connected to a corresponding screw 52 to drive the screw 52 to rotate. The two driving wheels 81 are transmission-connected to the driving wheel through the synchronous belt 83, that is, the driving wheel 81 drives the two driven wheels 82 to rotate together through the synchronous belt 83, so that the screw 52 rotates to realize the lifting function of the print head 10.

[0080] It can be understood that in this embodiment, by providing a driven wheel 82 connected to a screw rod 52, and providing a driving wheel to simultaneously connect the two driven wheels 82 through a synchronous belt 83, so that the two screw rods 52 can be driven to rise and fall synchronously by using a driving wheel 81, thereby reducing the driving cost of the 3D printer 100 of the present application.

[0081] Please cooperate Fig.12 As shown, Fig.12 Schematic diagram of the structure of a tensioning mechanism 90 provided in one embodiment of the present application.

[0082] like Fig.11 and Fig.12As shown, in one embodiment, the 3D printer 100 further includes a tensioning mechanism 90. The tensioning mechanism 90 is used to adjust the tightness of the synchronous belt 83, so as to facilitate the synchronous belt 83 to generate better tension and stability during the transmission process, and reduce the sliding and slipping of the synchronous belt 83. Specifically, the tensioning mechanism 90 includes an idler wheel 91, a fixing member 92 and an elastic member 93. The fixing member 92 is fixed to the base 40, and the elastic member 93 is arranged between the idler wheel 91 and the fixing member 92, so that the idler wheel 91 can slide relative to the base 40, and the synchronous belt 83 is connected to the idler wheel 91. The relative position between the idler wheel 91 and the fixing member 92 is adjusted by the elastic member 93, so that the tension adjustment of the synchronous belt 83 can be achieved.

[0083] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] It should be understood that the application of this application is not limited to the above examples. For ordinary technicians in this field, they can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the claims of this application still fall within the scope covered by this application.

Claims

1. A 3D printer, characterized in that: It comprises a base, a crossbeam, two optical axes and two screw rods; the base and the crossbeam are arranged at intervals, and one end of each of the two optical axes is connected to the base; The crossbeam is provided with a connection adjustment member corresponding to each optical axis, the other end of each optical axis is connected to the crossbeam through the corresponding connection adjustment member, and each optical axis is rotatable relative to the corresponding connection adjustment member; Each of the two screw rods is rotatably connected between the base and the crossbeam, and each of the screw rods is connected to one of the optical axes via a slider assembly, and the slider assembly can slide along the length direction of the screw rod. The two slider assemblies are connected by a cross bar, and the cross bar is used to move vertically from one end of the optical axis to the other end along a reference plane during the vertical leveling stage of the optical axis, so that the two optical axes swing to their respective corresponding target positions.

2. The 3D printer according to claim 1, characterized in that: The two optical axes include a first optical axis, and the connection adjustment member corresponding to the first optical axis includes a connection block fixed to the crossbeam, the connection block has a receiving hole, and the aperture of the receiving hole is larger than the diameter of the first optical axis.

3. The 3D printer according to claim 2, characterized in that: The 3D printer also fills a fixing glue in the gap between the receiving hole and the first optical axis to keep the first optical axis at a target position.

4. The 3D printer according to claim 1, characterized in that: The base includes a limiting hole and a limiting member corresponding to each optical axis, the limiting member is arranged on the inner wall of the limiting hole, each optical axis extends into the corresponding limiting hole, and the limiting member abuts against the outer periphery of each optical axis to limit the swing angle of one end of each optical axis connected to the base.

5. The 3D printer according to claim 4, characterized in that: The limiting member includes at least three protrusions, which are arranged at intervals along the circumference of the limiting hole, and each of the protrusions extends radially toward the optical axis and contacts the optical axis to limit the swing angle of the optical axis.

6. The 3D printer according to claim 4, characterized in that: The limiting member comprises an elastic ring, which is sleeved on the periphery of the optical axis and contacts the optical axis to limit the swing angle of the optical axis.

7. The 3D printer according to claim 4, characterized in that: A baffle is provided in the limiting hole. The baffle is located on a side of the limiting member away from the crossbeam. The baffle contacts the end of the optical axis to limit the axial displacement of the optical axis.

8. The 3D printer according to claim 3, characterized in that: A sealing ring is sleeved on the periphery of the first optical axis close to one end of the connecting block, and the sealing ring is used to seal the receiving hole to prevent the fixing glue from flowing out.

9. The 3D printer according to any one of claims 2 to 7, characterized in that: The slider assembly comprises a sliding bearing and a sliding block. The sliding bearing is sleeved on the periphery of the optical axis, and the sliding block is sleeved on the periphery of the screw rod. The sliding bearing and the sliding block are mutually supported.

10. The 3D printer according to any one of claims 2 to 7, characterized in that: The 3D printer is also provided with a driving wheel, two driven wheels and a synchronous belt in the base, each screw rod is connected to a driven wheel, the driving wheel is connected to the two driven wheels through the synchronous belt, and the driving wheel is used to drive the two driven wheels to rotate synchronously.

11. The 3D printer according to claim 10, characterized in that: The 3D printer also includes an idler wheel, a fixing member and an elastic member. The fixing member is fixedly arranged on the base, the idler wheel is slidably arranged on the base, the elastic member is arranged between the idler wheel and the fixing member, and is used to adjust the relative position between the idler wheel and the fixing member. The synchronous belt is also connected to the idler wheel.

12. A 3D printing system, characterized in that: The 3D printing system comprises a feeding device and a 3D printer as described in any one of claims 1 to 11, wherein the feeding device is used to provide printing materials to the 3D printer.

Images