3D printing platform and 3D printer

Abstract

Provided in the present application are a 3D printing platform and a 3D printer. The 3D printing platform comprises a heated bed, a heated bed support, two groups of leveling assemblies, and a horizontal fixing member. The heated bed is used for heating and bearing a printing panel or a printed part, the heated bed support is arranged on the side of the heated bed away from the bearing surface, and there is a gap between the heated bed and the heated bed support in a first direction perpendicular to the bearing surface. The heated bed support is used for supporting the heated bed in the first direction by means of at least two groups of leveling assemblies, wherein any one of the leveling assemblies is connected to both a first position on the heated bed and the heated bed support for adjusting the distance between the first position and the heated bed support in the first direction. The horizontal fixing member is used for fixedly connecting the heated bed and the heated bed support in a second direction, so as to limit the relative movement between the heated bed and the heated bed support in the second direction perpendicular to the first direction. The present application can increase the motion stiffness of the 3D printing platform by adding the horizontal fixing member.

Description

3D printing platform and 3D printer

[0001] This invention claims priority from the prior application No. 2023116662203 filed on December 6, 2023, entitled “3D printing platform and 3D printer”. The contents of the above-mentioned prior application are incorporated into this text by introduction. Technical Field

[0002] The present application belongs to the technical field, and specifically relates to a 3D printing platform and a 3D printer. Background Art

[0003] A 3D printer (also known as a three-dimensional printer or stereo printer) is a type of rapid prototyping equipment. The 3D printing technology currently available for 3D printers is fused deposition modeling (FDM). FDM is a technology that constructs three-dimensional objects by printing layer by layer using materials such as powdered metal or plastic based on digital models. In specific implementations, a 3D printer using FDM technology uses a feeding mechanism to supply hot-melt filamentary material (wire material or material line) to the hot end, where the hot-melt filamentary material is heated to a molten state. The nozzle at the hot end can then extrude the molten material onto the printing platform while moving along the printing path of the 3D printer, printing out the three-dimensional object layer by layer.

[0004] When a 3D printer is working, the printing platform and the hot end will produce relative displacement. It is usually required that the bearing surface of the printing platform and the plane of the hot end's XY direction movement relative to the printing platform should be as parallel as possible. Currently, a leveling mechanism with screws and springs is usually used to adjust the angle of the hot bed bearing surface.

[0005] Summary of the Invention

[0006] The first aspect of the present application provides a 3D printing platform, comprising:

[0007] A heated bed, used to heat and support the printing panel or printed parts;

[0008] a heated bed support, disposed on a side of the heated bed facing away from a bearing surface, wherein the bearing surface is a side of the heated bed that bears the printing panel or the printed workpiece, and wherein a gap exists between the heated bed and the heated bed support in a first direction, wherein the first direction is perpendicular to the bearing surface;

[0009] at least two sets of leveling assemblies, the heated bed support being used to support the heated bed in the first direction via the at least two sets of leveling assemblies, wherein any one of the leveling assemblies is respectively connected to the first position of the heated bed and the heated bed support, and is used to adjust the distance between the first position and the heated bed support in the first direction;

[0010] The horizontal fixing member is used to fix the heated bed and the heated bed support in a second direction and to limit the relative movement of the heated bed and the heated bed support in the second direction, wherein the second direction is perpendicular to the first direction.

[0011] The 3D printing platform provided in the first aspect of the present application utilizes at least two or at least three sets of leveling components to connect the first position of the hot bed and the hot bed support in a first direction, respectively, and adjust the distance between the first position of the hot bed and the hot bed in the first direction, thereby leveling the hot bed. However, the leveling components cannot achieve a rigid connection between the hot bed and the hot bed support, resulting in poor rigidity when the hot bed support drives the hot bed to move. Therefore, the present application adds a horizontal fixing member, which is used to connect the hot bed and the hot bed support in a second direction perpendicular to the first direction, thereby fixedly connecting the hot bed and the hot bed support in the second direction, thereby limiting the relative movement of the hot bed and the hot bed support in the second direction, preventing the hot bed and the hot bed support from shaking in the second direction, and improving the rigidity between the hot bed and the hot bed support, thereby improving the printing effect.

[0012] In one possible embodiment, the heated bed includes a main body having the supporting surface, and an extension located on a side of the main body facing away from the supporting surface. The horizontal fixing member includes a first fixing member configured to securely connect a second position on the extension to the heated bed support to restrict relative movement between the second position and the heated bed support. The at least two sets of leveling components and the projection of the second position on the supporting surface form vertices of a polygon. Because the positional relationship between the heated bed and the heated bed support is fixed at the first fixing member, the first fixing member can serve as a reference point for leveling the heated bed, enabling adjustment of the at least two sets of leveling components at other positions to achieve leveling, thereby improving the accuracy and efficiency of heated bed leveling.

[0013] The number of the first fixing member is one; the at least two sets of leveling components are composed of two sets of leveling components, and the projections of the two sets of leveling components and the second position on the supporting surface form the vertices of a triangle; or the at least two sets of leveling components are composed of three sets of leveling components, and the projections of the three sets of leveling components and the second position on the supporting surface form the vertices of a quadrilateral. The first fixing member and the leveling component are each located at a vertex of the polygon and are therefore located at different positions.

[0014] In one possible embodiment, the printing platform further includes a vertical fixing member configured to securely connect a third position of the heated bed to the heated bed support to restrict relative movement between the third position and the heated bed support, wherein the at least two sets of leveling components and the projection of the third position on the supporting surface constitute vertices of a polygon. Because the positional relationship between the heated bed and the heated bed support is fixed at the vertical fixing member, the vertical fixing member can serve as a reference point for hot bed leveling, enabling adjustment of the at least two sets of leveling components at other positions to complete leveling, thereby improving the accuracy and efficiency of hot bed leveling.

[0015] There is one vertical fixing member; the at least two sets of leveling assemblies are composed of two sets of leveling assemblies, and the projections of the two sets of leveling assemblies and the third position on the supporting surface form the vertices of a triangle; or the at least two sets of leveling assemblies are composed of three sets of leveling assemblies, and the projections of the three sets of leveling assemblies and the third position on the supporting surface form the vertices of a quadrilateral. The vertical fixing member and the leveling assembly are each located at a vertex of the polygon and are therefore located at different positions.

[0016] In a possible implementation, the at least two groups of leveling components are at least three groups of leveling components, and projections of the at least three groups of leveling components on the bearing surface constitute vertices of a polygon.

[0017] In a possible embodiment, the heated bed includes a body having the bearing surface, and an extension portion located on a side of the body facing away from the bearing surface, the horizontal fixing member includes a second fixing member, and the second fixing member is a fixing screw; the second fixing member passes through a through hole at a fourth position on the extension portion and is connected to a screw hole on the heated bed support, the aperture of the through hole is larger than the diameter of the second fixing member, and friction exists between the extension portion and the heated bed support and / or between the extension portion and the second fixing member; or the second fixing member passes through the through hole on the heated bed support and is connected to the screw hole at the fourth position, the aperture of the through hole is larger than the diameter of the second fixing member, and friction exists between the extension portion and the heated bed support and / or between the heated bed support and the second fixing member; the axial direction of the second fixing member is the second direction, and the friction force is used to limit the relative movement of the second fixing member within the range of the through hole, thereby limiting the relative movement of the fourth position and the heated bed support in the first direction or a third direction, wherein the third direction is perpendicular to the first direction and the second direction, respectively. Since the aperture of the through hole is larger than the diameter of the second fixing member, not only can the heated bed be leveled at the position of the second fixing member (for example, by using a leveling force greater than the friction force for leveling), but the stiffness between the heated bed and the heated bed support in the first, second, and third directions can also be increased; alternatively, since the aperture of the through hole is larger than the diameter of the second fixing member, the heated bed can be leveled at the position of the second fixing member first, and after the leveling is completed, the second fixing member can be used to fix the heated bed and the heated bed support in the first, second, and third directions.

[0018] The through hole is an elongated hole arranged along the first direction, which can achieve rigid fixation between the heated bed and the heated bed support in the second and third directions, and only relies on friction to fix in the first direction, which has a better fixing effect and allows the heated bed to be leveled.

[0019] In which, the horizontal fixing member also includes a third fixing member, which is a fixing screw; the third fixing member passes through the through hole at the fifth position on the extension part and is connected to the screw hole on the heated bed bracket, the aperture of the through hole is larger than the diameter of the third fixing member, and there is friction between the extension part and the heated bed bracket and / or between the extension part and the third fixing member; or, the third fixing member passes through the through hole on the heated bed bracket and is connected to the screw hole at the fifth position, the aperture of the through hole is larger than the diameter of the third fixing member, and there is friction between the extension part and the heated bed bracket and / or between the heated bed bracket and the third fixing member; the axial direction of the third fixing member is the third direction, and the friction force is used to limit the relative movement of the third fixing member within the range of the through hole, thereby limiting the relative movement of the fifth position and the heated bed bracket in the first direction or the second direction. Because the diameter of the through hole is larger than the diameter of the third fixing member, not only can the heated bed be leveled at the location of the third fixing member (for example, using a leveling force greater than the friction force for leveling), but the rigidity between the heated bed and the heated bed support in the first, second, and third directions can also be increased. Alternatively, because the diameter of the through hole is larger than the diameter of the third fixing member, the heated bed can be leveled at the location of the third fixing member first, and then the third fixing member can be used to fix the heated bed and the heated bed support in the first, second, and third directions after the leveling is completed. Furthermore, the third fixing member, in conjunction with the second fixing member, can achieve rigid fixation between the heated bed and the heated bed support in the second and third directions, while relying solely on friction for fixation in the first direction, resulting in a better fixation effect and allowing the heated bed to be leveled.

[0020] Wherein, the through hole is an elongated hole arranged along the first direction.

[0021] In a possible embodiment, the number of the horizontal fixing members includes two fixing members, one of which is located on one side of the other fixing member in the second direction; or, one fixing member is located on one side of the other fixing member in the third direction; or, a line connecting one fixing member and the other fixing member has a component in the second direction and a component in the third direction; wherein, the third direction is perpendicular to the first direction and the second direction, respectively.

[0022] The horizontal fixing member may be composed of a first fixing member and a second fixing member, wherein the second fixing member is located on one side of the first fixing member in the second direction; or, the second fixing member is located on one side of the first fixing member in the third direction.

[0023] The angles between the connecting line and the second direction and the third direction are both 45 degrees.

[0024] In a possible embodiment, the number of the horizontal fixing members includes at least three fixing members, and the projections of the at least three fixing members on the supporting surface form vertices of a polygon.

[0025] In a possible embodiment, any one of the leveling components includes a leveling member and a leveling elastic member. The leveling member passes through the heated bed from the bearing surface and is connected to the heated bed bracket, or the leveling member passes through the heated bed bracket and is connected to the heated bed. Opposite ends of the leveling elastic member respectively abut against the heated bed bracket and the heated bed.

[0026] In a possible implementation, the heated bed support is connected to a pulley, and the sliding direction corresponding to the pulley is the second direction or the third direction, wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0027] In one possible embodiment, the heated bed support is connected to a pulley, and the sliding direction corresponding to the pulley is a fourth direction, and the fourth direction has a component in the second direction and a component in the third direction. Specifically, the fourth direction forms an angle of 45 degrees with the second direction and the third direction.

[0028] The second aspect of the present application provides a 3D printer, comprising: a three-dimensional print head, a base, a drive device, and a 3D printing platform as provided in the first aspect of the present application, wherein the three-dimensional print head is arranged above the 3D printing platform, and the three-dimensional print head is used to extrude material to print a model; the heated bed bracket is slidably connected to the base, and the drive device is used to drive the relative displacement between the heated bed bracket and the base.

[0029] The 3D printer provided in the second aspect of the present application, by adopting the 3D printing platform provided in the first aspect of the present application, can improve the rigidity of the 3D printer and improve the accuracy and efficiency of leveling. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] FIG1 is a schematic diagram of the three-dimensional structure of a 3D printing platform in one embodiment of the present application.

[0032] FIG2 is a schematic diagram of the three-dimensional structure of the 3D printing platform shown in FIG1 from another perspective.

[0033] FIG3 is a schematic diagram of the three-dimensional structure of the hot bed in the 3D printing platform shown in FIG2 with the outer shell removed.

[0034] FIG4 is an exploded view of the 3D printing platform shown in FIG3 .

[0035] FIG5 is an exploded view of the 3D printing platform shown in FIG4 from another perspective.

[0036] FIG6 is a schematic cross-sectional view of the 3D printing platform shown in FIG3 .

[0037] FIG7 is a partial schematic diagram of the 3D printing platform shown in FIG6 .

[0038] FIG8 is an exploded view of a 3D printing platform in another embodiment of the present application.

[0039] FIG9 is a cross-sectional schematic diagram of a 3D printing platform in another embodiment of the present application.

[0040] FIG10 is a cross-sectional schematic diagram of a 3D printing platform in another embodiment of the present application.

[0041] FIG11 is a cross-sectional schematic diagram of a 3D printing platform in yet another embodiment of the present application.

[0042] FIG12 is a schematic diagram of a 3D printer in one embodiment of the present application.

[0043] Description of labels:

[0044] 3D printing platform-1, 3D printer-2, heated bed-10, bearing surface-100, first position-101, second position-102, main body-11, extension-12, through hole-120, housing-13, heated bed bracket-20, pulley-21, leveling assembly-30, first leveling assembly-301, second leveling assembly-302, leveling member-31, leveling elastic member-32, horizontal fixing member-40, first fixing member-41, head-411, rod-412, elastic member-413, second fixing member-42, first fixing screw-421, second fixing screw-422, third fixing member-43, vertical fixing member-50, 3D printing head-60, base-61, slide rail-610. DETAILED DESCRIPTION

[0045] The implementation of the technical solution of the present application is further described in detail below with reference to the accompanying drawings.

[0046] In this application, unless otherwise expressly specified and limited, the terms "fixed", "set", "installed", and "connected" may indicate that one element is directly on another element or there may be an intermediate element. "Fixed" may be understood as "fixed connection", and "set", "installed", and "connected" may all be understood as a type of connection. At the same time, the connection may include a mechanical connection or a structural connection, and may also be understood as an electrical connection, a thermal connection, or a communication connection. For mechanical or structural connections, the connection includes a detachable connection and a non-detachable connection. For example, a fixed connection may include a detachable fixed connection, a non-detachable fixed connection, or an integrally formed connection. A rotating connection may include a detachable rotating connection and a non-detachable rotating connection. A sliding connection may include a detachable sliding connection and a non-detachable sliding connection. The connection may also be a direct connection or an indirect connection through a component. For example, a detachable fixed connection refers to a state in which the positional relationship between at least two connected objects can be fixed in the installed state. Similarly, there are rotating connections, sliding connections, and the like.

[0047] The terms "parallel," "perpendicular," and "same direction" are based on the current state of the art, rather than being strictly mathematically defined, and allow for a small amount of deviation. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°. For another example, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80° and 100°. For another example, "A and B are in the same direction" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0° and 10°.

[0048] The terms "rigid", "rigid connection" and "rigid fixation" do not mean absolutely no deformation in the physical sense. In this application, "rigid", "rigid connection" and "rigid fixation" allow for a small amount of deformation.

[0049] Please refer to Figures 1-6. Figure 1 is a schematic diagram of the three-dimensional structure of the 3D printing platform in one embodiment of the present application. Figure 2 is a schematic diagram of the three-dimensional structure of the 3D printing platform shown in Figure 1 from another perspective. Figure 3 is a schematic diagram of the three-dimensional structure of the hot bed in the 3D printing platform shown in Figure 2 after the outer shell is removed. Figure 4 is an exploded view of the 3D printing platform shown in Figure 3. Figure 5 is an exploded view of the 3D printing platform shown in Figure 4 from another perspective. Figure 6 is a schematic cross-sectional view of the 3D printing platform shown in Figure 3.

[0050] The 3D printing platform 1 provided in this embodiment includes a hot bed 10, a hot bed support 20, a leveling assembly 30, and a horizontal fixing member 40. The hot bed 10 is used to heat and support a printing panel or printed workpiece. The hot bed support 20 is disposed on the side of the hot bed 10 facing away from the support surface 100. The support surface 100 is the side of the hot bed 10 that supports the printing panel or printed workpiece. The hot bed 10 and the hot bed support 20 are spaced apart in a first direction, which is perpendicular to the support surface 100 and may also be referred to as the Z-axis direction. The hot bed support 20 is used to support the hot bed 10 in the first direction via at least two sets of leveling assemblies 30, wherein each leveling assembly 30 is respectively connected to the first position 101 of the hot bed 10 and the hot bed support 20, and is used to adjust the distance between the first position 101 and the hot bed support 20 in the first direction. The horizontal fixing member 40 is used to securely connect the heated bed 10 and the heated bed support 20 in a second direction, thereby limiting relative movement of the heated bed 10 and the heated bed support 20 in the second direction, which is perpendicular to the first direction. The second direction may be the X-axis direction, the Y-axis direction, or another direction perpendicular to the Z-axis direction.

[0051] Not all leveling assemblies 30 share one first position 101 , but each leveling assembly 30 has its own first position 101 .

[0052] Among them, the horizontal fixing member 40 can be detachable, that is, based on actual needs, the horizontal fixing member 40 can be used for fixing after leveling is completed, or the horizontal fixing member 40 can be used for fixing before leveling to promote stability during the leveling process.

[0053] The 3D printing platform 1 in this embodiment primarily comprises a heated bed 10, a heated bed support 20, at least two sets of leveling components 30, and a horizontal fixture 40. The heated bed 10 is primarily used to support a print panel or printed workpiece, providing a supporting base for the print panel or printed workpiece. Therefore, the surface of the heated bed 10 used to support the print panel or printed workpiece can be referred to as the supporting surface 100. In other words, as shown in Figures 1 and 4, the upper surface of the heated bed 10 is the supporting surface 100. Furthermore, the heated bed 10 can also be used to heat the print panel or printed workpiece. The purpose of heating the print panel is to heat the printed workpiece, thereby improving print quality.

[0054] The heated bed support 20 is the support for the heated bed 10, primarily used to support and mount the heated bed 10. The heated bed support 20 can be positioned on the side of the heated bed 10 facing away from the support surface 100. In other words, as shown in Figure 4 , the heated bed support 20 is positioned on the lower surface of the heated bed 10. The heated bed support 20 is slidably connected to the Y-axis profile, allowing it to slide, thereby driving the heated bed 10 mounted on it to slide, thereby achieving relative displacement between the 3D print head and the heated bed in the Y-axis direction.

[0055] Optionally, the heated bed support 20 is connected to a pulley 21. Specifically, the pulley 21 is provided on the side of the heated bed support 20 facing away from the heated bed 10. A slide rail 610 is provided on the Y-axis profile of the base 61. The pulley 21 and the slide rail 610 enable the heated bed support 20 to slide relative to the Y-axis profile along the Y-axis direction, where the Y-axis direction can be the second or third direction. Furthermore, the heated bed support 20 is spaced apart from the heated bed 10 in a direction perpendicular to the support surface 100. In this embodiment and hereinafter, the direction perpendicular to the support surface 100 is referred to as the first direction. In other words, the heated bed support 20 and the heated bed 10 do not contact each other in the first direction, but rather have a certain spacing therebetween, facilitating the leveling assembly 30 to adjust the spacing between the heated bed support 20 and the heated bed 10 in the first direction to achieve leveling. Furthermore, if the support surface 100 of the heated bed 10 is considered a surface consisting of an X-direction and a Y-direction, then the first direction is the Z-direction.

[0056] The leveling assembly 30 is primarily used to achieve support and leveling. Specifically, the leveling assembly 30 connects the first position 101 of the hot bed 10 to the hot bed support 20 along a first direction, thereby spacing the hot bed 10 and the hot bed support 20 in the first direction. Alternatively, it can be understood that there is a spacing between the first position 101 of the hot bed 10 and the hot bed support 20 in the first direction. The first position 101 mentioned above can be understood as the location where the leveling assembly 30 connects to the hot bed 10. Because the leveling assembly 30 connects the hot bed 10 and the hot bed support 20, the hot bed support 20 supports the hot bed 10 in the first direction through the leveling assembly 30. Furthermore, the leveling assembly 30 can adjust the distance between the first position 101 of the hot bed 10 and the hot bed support 20 in the first direction, thereby changing the angle of the support surface 100 of the hot bed 10 to achieve leveling. How the leveling assembly 30 performs leveling in this application will be described in detail below.

[0057] The horizontal fixing member 40 is used to connect the heated bed 10 and the heated bed support 20 together in the other direction. For example, the horizontal fixing member 40 fixes the heated bed 10 and the heated bed support 20 in the second direction. At this time, at the position of the horizontal fixing member 40, there may be no gap between the heated bed 10 and the heated bed support 20 in the second direction. In other words, at the position of the horizontal fixing member 40, the heated bed 10 and the heated bed support 20 are in contact. The position of the horizontal fixing member 40 is where the horizontal fixing member 40 is connected to the heated bed 10. The second direction is perpendicular to the first direction. If the first direction is the Z-axis direction, the second direction is the X-axis direction, the Y-axis direction, or other direction perpendicular to the Z-axis direction. For example, the angle between the second direction and the X-axis direction and the Y-axis direction is 45 degrees. In this way, the horizontal fixing member 40 can be used to limit the relative movement of the heated bed 10 and the heated bed support 20 in the second direction.

[0058] In summary, through the above arrangement, this embodiment utilizes the horizontal fixing member 40 to constrain the heated bed 10 and the heated bed support 20, preventing shaking between the heated bed 10 and the heated bed support 20 and improving the rigidity between the heated bed 10 and the heated bed support 20. Furthermore, the horizontal fixing member 40 can also serve as a reference point for leveling the heated bed 10, thereby improving the accuracy and efficiency of leveling the heated bed 10.

[0059] It is worth noting that in this embodiment, there are at least two sets of leveling assemblies 30, each of which is connected to the first position 101 of the heated bed 10 and the heated bed support 20. Each set of leveling assemblies 30 is used to adjust the distance between the first position 101 of the heated bed 10 and the heated bed support 20 in a first direction. This ensures that the projections of the at least two sets of leveling assemblies 30 and a fixing member (including but not limited to the horizontal fixing member 40 or the vertical fixing member 50) on the support surface 100 form at least three coplanar points.

[0060] Referring again to Figures 4-6 , in this embodiment, the heated bed 10 includes a main body 11 having a support surface 100, and an extension 12 located on a side of the main body 11 facing away from the support surface 100. The horizontal fixing member 40 includes a first fixing member 41. The first fixing member 41 is used to securely connect a second location 102 on the extension 12 to the heated bed support 20, thereby restricting relative movement between the second location 102 and the heated bed support 20. The at least two sets of leveling assemblies 30 and the projection of the second location 102 on the support surface 100 form the vertices of a polygon. The first fixing member 41 fixes the relative position of the second location 102 and the heated bed support 20, but does not restrict the heated bed 10 from rotating relative to the heated bed support 20 about the first fixing member 41. Therefore, the first fixing member 41 can also serve as a reference point for leveling the heated bed 10, thereby improving the accuracy and efficiency of leveling the heated bed 10. For example, at the position of the first fixing member 41, during the leveling process by the leveling assembly 30, the heated bed 10 can rotate around the first fixing member 41, thereby changing the angle of the supporting surface 100 of the heated bed 10 to achieve the purpose of leveling. Optionally, the second position 102 is different from the first position 101.

[0061] Not all first fixing members 41 share one second position 102 , but each first fixing member 41 has its own second position 102 .

[0062] The heated bed 10 comprises a main body 11 and an extension 12. The main body 11 is the portion that heats and supports the print panel or printed workpiece, and thus the support surface 100 is the upper surface of the main body 11. The extension 12 is located on the side of the main body 11 facing away from the support surface 100, that is, the extension 12 is disposed on the lower surface of the main body 11. The extension 12 can be arranged corresponding to the side wall of the heated bed support 20, providing a foundation for the horizontal fixing member 40 to connect the extension 12 to the heated bed support 20. In this case, the extension 12 can also be referred to as a rib for securing the horizontal fixing member 40.

[0063] The horizontal fixing member 40 includes a first fixing member 41, which is the aforementioned component that securely connects the heated bed 10 to the heated bed support 20 in the second direction. Specifically, the first fixing member 41 securely connects the extension 12 to the sidewall of the heated bed support 20 in the second direction. The location where the first fixing member 41 connects to the extension 12 is the aforementioned second location 102. The extension 12 and the first fixing member 41 restrict relative movement between the second location 102 and the heated bed support 20, thereby enhancing the rigidity of the 3D printing platform 1. Furthermore, the projections of at least two sets of leveling assemblies 30 and the second location 102 on the support surface 100 form the vertices of a polygon, allowing at least three points to be coplanar, thereby ensuring the support and connection performance of the 3D printing platform 1. Furthermore, the first fixing member 41 serves as a leveling reference point for the 3D printing platform, allowing the heated bed 10 to rotate relative to the heated bed support 20 about the first fixing member 41, simplifying leveling.

[0064] In one possible implementation, the number of the first fixing member 41 is one; the at least two groups of leveling components are composed of two groups of leveling components, and the two groups of leveling components and the projection of the second position 102 on the bearing surface constitute the vertices of a triangle; or, the at least two groups of leveling components are composed of three groups of leveling components, and the three groups of leveling components and the projection of the second position 102 on the bearing surface constitute the vertices of a quadrilateral.

[0065] Optionally, as shown in FIG. 2 , the heated bed 10 may further include a housing 13 . The housing 13 is detachably disposed on a side of the body 11 facing away from the supporting surface 100 and surrounds the periphery of the extension 12 . At least a portion of the heated bed support 20 is disposed within the housing 13 . The housing 13 can effectively protect the heated bed support 20 and components on the heated bed 10 .

[0066] Referring again to Figures 4-6 , in this embodiment, the first fixing member 41 is a fixing screw. The first fixing member 41 passes through the through-hole 120 at the second position 102 and is connected to the screw hole on the heated bed support 20. Alternatively, the first fixing member 41 passes through the through-hole 120 on the heated bed support 20 and is connected to the screw hole at the second position 102. The diameter of the first fixing member 41 is consistent with the diameter of the through-hole 120. Thus, the first fixing member 41 fixes the relative position of the second position 102 and the heated bed support 20, but does not restrict the heated bed 10 from rotating relative to the heated bed support 20 around the first fixing member 41.

[0067] In this embodiment, the first fixing member 41 can be a set screw or a transverse screw. To achieve a fixed connection between the extension portion 12 and the heated bed support 20, in one embodiment, a through hole 120 can be provided at the second position 102 of the extension portion 12. That is, a through hole 120 is added at the position corresponding to the first fixing member 41 to tighten the screw. A screw hole can also be provided in the heated bed support 20, allowing the first fixing member 41 to pass through the through hole 120 at the second position 102 and connect to the screw hole in the heated bed support 20. In other embodiments, a through hole 120 can be provided in the heated bed support 20, and a screw hole can also be provided at the second position 102 of the extension portion 12, allowing the first fixing member 41 to pass through the through hole 120 in the heated bed support 20 and connect to the screw hole in the second position 102. This embodiment is merely schematically illustrated by the first fixing member 41 passing through the through hole 120 at the second position 102 and connecting to the screw hole in the heated bed support 20.

[0068] In this embodiment, the diameter of the first fixing member 41 is consistent with the aperture of the through hole 120. This allows the first fixing member 41 to not only restrict the relative movement of the heated bed 10 and the heated bed support 20 in the second direction, but also restrict the relative movement of the heated bed 10 and the heated bed support 20 in the first and third directions, thereby improving the rigidity, support, and connection performance of the 3D printing platform 1. Before leveling, the first fixing member 41 can be screwed in with a low tightening force, and then the leveling process can be carried out. After the leveling process is completed, the first fixing member 41 can be fully tightened. This allows the first fixing member 41 to be used to both increase rigidity and assist in leveling.

[0069] It is worth noting that when the first fixing member 41 securely connects the extension 12 to the heated bed support 20, friction exists between the extension 12 and the heated bed support 20 and / or between the extension 12 and the first fixing member 41. Alternatively, friction exists between the extension 12 and the heated bed support 20 and / or between the heated bed support 20 and the first fixing member 41. In this embodiment, friction is used to limit the axial rotation of the heated bed 10 relative to the heated bed support 20 about the first fixing member 41. Therefore, the secure connection of the first fixing member 41 prevents the heated bed 10 from rotating freely relative to the heated bed support 20. Furthermore, leveling can only be achieved when the rotational force generated during leveling is greater than the frictional force.

[0070] Referring to FIG. 4 , in this embodiment, the at least two sets of leveling assemblies 30 may be at least three sets of leveling assemblies 30, the projections of which on the support surface 100 form the vertices of a polygon. In this embodiment, the number of leveling assemblies 30 is at least three, and the projections of which on the support surface 100 form the vertices of a polygon. This means that the at least three sets of leveling assemblies 30 form three coplanar points, thereby achieving the desired connection and support effect between the heated bed 10 and the heated bed support 20 using only the leveling assemblies 30.

[0071] Please refer to Figure 7, which is a partial schematic diagram of the 3D printing platform shown in Figure 6. In this embodiment, the 3D printing platform 1 may further include an elastic member 413. The first fixing member 41 includes a head portion 411 and a rod portion 412 connected to each other. The rod portion 412 connects the second position 102 of the extension portion 12 and the heated bed support 20. The head portion 411 is located on the side of the extension portion 12 facing away from the heated bed support 20. The elastic member 413 can be compressed and held between the second position 102 of the extension portion 12 and the head portion 411.

[0072] When the first fixing member 41 is a set screw, the fixing screw generally includes a threaded head and a threaded rod, wherein the threaded head is the head portion 411 and the threaded rod is the rod portion 412. In this embodiment, the rod portion 412 can pass through the second position 102 of the extension portion 12 and connect to the heated bed support 20. In this case, an elastic member 413 can be added. The elastic member 413 is compressed and abuts between the second position 102 of the extension portion 12 and the head portion 411. This can control the locking force of the first fixing member 41, so that there is no gap between the second position 102 of the extension portion 12 and the heated bed support 20, but it is not completely locked, allowing rotation around the fixing member. Specifically, when the first fixing member 41 is fully locked, the elastic member 413 is compressed but not completely pressed, so that the elastic member 413 generates a certain amount of compression force, thereby achieving the function of no gap between the two extension portions 12 and the heated bed support 20, but not completely locked, allowing rotation around the first fixing member 41, thereby adjusting the degree of freedom of the heated bed 10 in the left and right directions. Optionally, the elastic member 413 includes but is not limited to a spring or a spring. Optionally, other horizontal fixing members 40 described below may also be provided with such an elastic member 413 .

[0073] Please refer to Figure 8, which is an exploded view of a 3D printing platform in another embodiment of the present application. In this embodiment, the printing platform further includes a vertical fixing member 50, which is used to securely connect the third position of the heated bed 10 to the heated bed support 20 to limit relative movement between the third position and the heated bed support 20. The at least two sets of leveling components 30 and the projection of the third position on the supporting surface 100 constitute the vertices of a polygon.

[0074] In another embodiment, a vertical fixing member 50 may be added to the horizontal fixing member 40. The vertical fixing member 50 can securely connect the third position of the hot bed 10 to the hot bed support 20 in the first direction. In this case, the position where the vertical fixing member 50 connects to the hot bed 10 is the third position mentioned above. This also limits the relative movement of the third position of the hot bed 10 and the hot bed support 20 in the first direction, and further limits the relative movement of the third position of the hot bed 10 and the hot bed support 20 in the second and third directions, thereby improving the rigidity of the 3D printing platform 1 and achieving a similar effect as the first fixing member 41. Therefore, in this embodiment, the vertical fixing member 50 can be used instead of the first fixing member 41. Furthermore, the projections of at least two sets of leveling components 30 and the third position on the support surface 100 form the vertices of a polygon, so that at least three points can be arranged coplanarly, thereby improving the support and connection performance of the 3D printing platform 1.

[0075] Not all vertical fixing members 50 share a third position, but each vertical fixing member 50 has its own third position.

[0076] In this embodiment, the vertical fixing member 50 is a fixing screw. The vertical fixing member 50 passes through the through hole 120 at the third position and is connected to the screw hole on the heated bed support 20. Alternatively, the vertical fixing member 50 passes through the through hole 120 on the heated bed support 20 and is connected to the screw hole at the third position. The diameter of the vertical fixing member 50 is consistent with the diameter of the through hole 120. Therefore, the vertical fixing member 50 fixes the relative position of the third position and the heated bed support 20.

[0077] The vertical fixing member 50 can be a fixing screw. To achieve a fixed connection between the heated bed 10 and the heated bed support 20, in one embodiment, a through hole 120 can be provided at a third position on the heated bed 10, and a screw hole can be provided on the heated bed support 20. The vertical fixing member 50 can then pass through the through hole 120 at the third position and connect to the screw hole on the heated bed support 20. In other embodiments, the through hole 120 can also be provided on the heated bed support 20, and a screw hole can be provided at a third position on the heated bed 10. The vertical fixing member 50 can then pass through the through hole 120 on the heated bed support 20 and connect to the screw hole at the third position. This embodiment is merely schematically illustrated as the vertical fixing member 50 passing through the through hole 120 at the third position and connecting to the screw hole on the heated bed support 20.

[0078] In addition, in this embodiment, the diameter of the vertical fixing member 50 is consistent with the aperture of the through hole 120, so that the vertical fixing member 50 can not only limit the mutual movement of the heated bed 10 and the heated bed support 20 in the first direction, but also limit the mutual movement of the heated bed 10 and the heated bed support 20 in the second direction and the third direction perpendicular to the first direction, thereby improving the rigidity, support, and connection performance of the 3D printing platform 1.

[0079] Please refer to Figures 4-5 and Figure 9, which is a cross-sectional schematic diagram of a 3D printing platform in another embodiment of the present application. In this embodiment, the hot bed 10 includes a main body 11 having the bearing surface 100, and an extension portion 12 located on the side of the main body 11 away from the bearing surface 100. The horizontal fixing member 40 includes a second fixing member 42, which is a fixing screw. The second fixing member 42 passes through the through hole 120 at the fourth position on the extension portion 12 and is connected to the screw hole on the hot bed bracket 20. The aperture of the through hole 120 is larger than the diameter of the second fixing member 42. There is friction between the extension portion 12 and the hot bed bracket 20 and / or between the extension portion 12 and the second fixing member 42. Alternatively, the second fixing member 42 passes through the through hole 120 in the heated bed support 20 and is connected to the screw hole at the fourth position. The diameter of the through hole 120 is larger than the diameter of the second fixing member 42. Friction exists between the extension 12 and the heated bed support 20 and / or between the heated bed support 20 and the second fixing member 42. The axial direction of the second fixing member 42 is the second direction, and the friction force is used to limit the relative movement of the second fixing member 42 within the range of the through hole 120, thereby limiting the relative movement of the fourth position and the heated bed support 20 in the first direction or a third direction, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

[0080] Not all second fixing members 42 share one fourth position, but each second fixing member 42 has its own fourth position.

[0081] The horizontal fixing member 40 may include a second fixing member 42, and the second fixing member 42 is also a fixing screw. In this embodiment, the second fixing member 42 can connect the fourth position of the extension portion 12 and the hot bed support 20. Specifically, in one embodiment, a through hole 120 can be opened at the fourth position of the extension portion 12, and a screw hole can be opened on the hot bed support 20, so that the second fixing member 42 passes through the through hole 120 at the fourth position and connects to the screw hole on the hot bed support 20. In other embodiments, a through hole 120 can also be opened on the hot bed support 20, and a screw hole can be opened at the fourth position of the extension portion 12, so that the second fixing member 42 passes through the through hole 120 on the hot bed support 20 and connects to the screw hole at the fourth position. This embodiment is only schematically described with the second fixing member 42 passing through the through hole 120 at the fourth position and connecting to the screw hole on the hot bed support 20.

[0082] The axial direction of the second fixing member 42 is also in the second direction, that is, the axial direction of the second fixing member 42 is the same as the axial direction of the first fixing member 41, both being in the second direction. In this embodiment, the diameter of the through hole 120 can be larger than the diameter of the second fixing member 42. In this way, even if the first fixing member 41 and the second fixing member 42 are both present, the heated bed 10 can still rotate around the first fixing member 41. At this time, the second fixing member 42 rotates around the first fixing member 41 within the through hole 120 with the larger diameter, thereby achieving leveling.

[0083] Furthermore, when the second fixing member 42 securely connects the extension 12 to the hot bed support 20, friction exists between the hot bed support 20 and / or between the extension 12 and the second fixing member 42, or between the extension 12 and the hot bed support 20 and / or between the hot bed support 20 and the second fixing member 42. This embodiment utilizes this friction to limit the relative movement of the second fixing member 42 within the through hole 120, thereby limiting relative movement between the fourth position of the extension 12 and the hot bed support 20 in the first or third direction, further improving the kinematic rigidity of the 3D printing platform 1 and the stability of the connection. Furthermore, leveling can only be achieved when the force exerted on the hot bed 10 or the hot bed support 20 in the first direction during leveling is greater than the friction. In other possible embodiments, the hot bed 10 can be leveled first at the position of the second fixing member 42, and after leveling is complete, the second fixing member 42 can be used to secure the hot bed 10 and the hot bed support 20 in the first, second, and third directions. Alternatively, the second fixing member 42 can be screwed in with a smaller locking force before leveling, and then the leveling process can be carried out. After the leveling is completed, the second fixing member 42 can be completely locked. In this way, the second fixing member 42 can be used to improve the rigidity and achieve leveling.

[0084] In this embodiment, the spatial relationship between the first position 101 and the fourth position is fixed. For example, it can be stipulated that, for any fourth position, the distance between the any fourth position and its corresponding first position 101 is less than a preset distance. Therefore, when any leveling component 30 adjusts the distance between the first position 101 and the heated bed support 20 in the first direction, the any leveling component 30 drives the corresponding second fixing member 42 to overcome the friction force (if the second fixing member 42 is locked; if it is not locked, it does not need to be overcome) and move along the first direction within the range of the through hole 120.

[0085] In this embodiment, the spatial relationship between the first position 101 and the fourth position of the heated bed 10 can be fixed. Thus, when any leveling assembly 30 adjusts the distance between the first position 101 and the heated bed support 20 in the first direction, that is, when the leveling assembly 30 adjusts the distance between the first position 101 of the heated bed 10 and the heated bed support 20 in the Z direction, any leveling assembly 30 can drive the corresponding second fixing member 42 to overcome the friction force and move within the through hole 120 along the first direction. Therefore, under the premise of providing the second fixing member 42, the distance between the first position 101 and the heated bed support 20 can also be adjusted, thereby adjusting the angle of the support surface 100 of the heated bed 10 to achieve the purpose of leveling.

[0086] Please refer to Figure 10, which is a cross-sectional schematic diagram of a 3D printing platform in another embodiment of the present application. In this embodiment, the second fixing member 42 includes a first fixing screw 421 and a second fixing screw 422, and the at least two sets of leveling components 30 include a first leveling component 301 and a second leveling component 302, wherein the first leveling component 301 drives the first fixing screw 421 to overcome the friction force (if the first fixing screw 421 is locked, or if it is not locked, then there is no need to overcome it) and move within the range of the through hole 120 where the first fixing screw 421 is located, and the second leveling component 302 drives the second fixing screw 422 to overcome the friction force (if the second fixing screw 422 is locked, or if it is not locked, then there is no need to overcome it) and move within the range of the through hole 120 where the second fixing screw 422 is located.

[0087] In this embodiment, the second fixing member 42 and the leveling assembly 30 are each provided in two sets. The second fixing member 42 includes a first fixing screw 421 and a second fixing screw 422, and the leveling assembly 30 includes a first leveling assembly 301 and a second leveling assembly 302. The first leveling assembly 301 and the first fixing screw 421 are provided in a pair, while the second leveling assembly 302 and the second fixing screw 422 are provided in a pair. The first leveling assembly 301 can drive the first fixing screw 421 to overcome friction and move within the through-hole 120 where the first fixing screw 421 is located. The second leveling assembly 302 can drive the second fixing screw 422 to overcome friction and move within the through-hole 120 where the second fixing screw 422 is located, thereby further adjusting the distance between the first position 101 of the heated bed 10 and the heated bed support 20 in the Z direction, thereby adjusting the angle of the support surface 100 of the heated bed 10 and achieving leveling.

[0088] Optionally, the number of leveling assemblies 30 is three, and the number of second fixing members 42 is also three, two, or one. In short, the number of second fixing members 42 is less than or equal to the number of leveling assemblies 30, and the number of first fixing members 41 is one. Taking the example of three second fixing members 42, each leveling assembly 30 is grouped with one second fixing member 42. As shown in Figures 4 and 5, the first fixing member 41, one group of leveling assemblies 30, and one second fixing member 42 are disposed on one side of the heated bed support 20, and two groups of leveling assemblies 30 and two second fixing members 42 are correspondingly disposed on the other side of the heated bed support 20. In other words, the heated bed 10 is provided with one first fixing member 41 and one second fixing member 42 on one side, respectively. However, there is no leveling assembly 30 at the location of the first fixing member 41, and a leveling assembly 30 is provided at the location of the second fixing member 42. The heated bed 10 is provided with two second fixing members 42 on the other side corresponding to the first fixing member 41 and the second fixing member 42 , and a leveling assembly 30 is provided at the location of each second fixing member 42 .

[0089] In another possible embodiment, a first fixing member 41 and a second fixing member 42 may be respectively provided on one side of the heated bed 10, and a leveling assembly 30 may be provided at the position where the second fixing member 42 is located, but no leveling assembly is provided at the position where the first fixing member 41 is located, and no second fixing member 42 is provided on the other side of the heated bed 10, and only two sets of leveling assemblies 30 are provided.

[0090] The above content can also be understood as follows: the heated bed support 20 includes one side and another side disposed opposite each other, wherein one side includes a first end and a second end disposed opposite each other, the first fixing member 41 being connected to the first end, and the second fixing member 42 and the leveling assembly 30 being connected to the second end. The other side includes a third end and a fourth end disposed opposite each other, the third end being provided with the second fixing member 42 and the leveling assembly 30, and / or the fourth end being provided with the second fixing member 42 and the leveling assembly 30.

[0091] Based on the above arrangement, when leveling, the leveling assembly 30 on the same side as the first fixing assembly can be adjusted first, causing the heated bed 10 to rotate around the first fixing member 41 until the leveling standard corresponding to the leveling assembly 30 is reached. Then, the leveling assembly 30 on the other side can be adjusted to adjust the horizontal heights of the heated bed 10 on both sides to be consistent until leveling is completed.

[0092] Optionally, when horizontal fixing members 40 are provided on opposite sides of the heated bed support 20 , the axes of the two oppositely arranged horizontal fixing members 40 coincide with each other, thereby avoiding interference during movement.

[0093] Please refer to Figure 11, which is a cross-sectional schematic diagram of a 3D printing platform in another embodiment of the present application. In this embodiment, the horizontal fixing member 40 includes a third fixing member 43, which is a fixing screw. The third fixing member 43 passes through the through hole 120 at the fifth position on the extension 12 and is connected to the screw hole on the hot bed support 20. The aperture of the through hole 120 is larger than the diameter of the third fixing member 43. Friction exists between the extension 12 and the hot bed support 20 and / or between the extension 12 and the third fixing member 43. Alternatively, the third fixing member 43 passes through the through hole 120 on the hot bed support 20 and is connected to the screw hole at the fifth position. The aperture of the through hole 120 is larger than the diameter of the third fixing member 43. Friction exists between the extension 12 and the hot bed support 20 and / or between the hot bed support 20 and the third fixing member 43.

[0094] The axial direction of the third fixing member 43 is the third direction, and the friction force is used to limit the relative movement of the third fixing member 43 within the range of the through hole 120, thereby limiting the relative movement of the fifth position and the heated bed support 20 in the first direction or the second direction.

[0095] Not all third fixing members 43 share one fifth position, but each third fixing member 43 has its own fifth position.

[0096] In addition to the first and second fixing members 41 and 42, the horizontal fixing member 40 may also include a third fixing member 43. These three fixing members may be combined in any manner or used independently. The third fixing member 43 is also a fixing screw. In this embodiment, the third fixing member 43 connects the fifth position of the extension portion 12 to the hot bed support 20. Specifically, in one embodiment, a through hole 120 may be provided at the fifth position of the extension portion 12, and a screw hole may be provided on the hot bed support 20. The third fixing member 43 extends through the through hole 120 at the fifth position and connects to the screw hole on the hot bed support 20. In other embodiments, the hot bed support 20 may also have a through hole 120 and a screw hole provided at the fifth position of the extension portion 12. The third fixing member 43 extends through the through hole 120 at the fifth position and connects to the screw hole at the fifth position. This embodiment is merely schematically illustrated with the third fixing member 43 extending through the through hole 120 at the fifth position and connecting to the screw hole on the hot bed support 20.

[0097] Furthermore, the axial direction of the third fixing member 43 is the third direction, that is, the axial direction of the third fixing member 43 is perpendicular to both the first direction of the first fixing member 41 and the second direction of the second fixing member 42. For example, the first direction may be the Z direction, the second direction may be the X direction, and the third direction may be the Y direction, where the sliding direction of the heated bed 10 relative to the 3D printer 2 is the Y direction. In this embodiment, the diameter of the through hole 120 can be larger than the diameter of the third fixing member 43. Thus, even if the first fixing member 41, the second fixing member 42, and the third fixing member 43 are present at the same time, the heated bed 10 can still rotate around the first fixing member 41. In this case, the third fixing member 43 rotates around the first fixing member 41 within the through hole 120 with the larger diameter, thereby achieving leveling.

[0098] Furthermore, when the third fixing member 43 securely connects the extension 12 to the hot bed support 20, friction exists between the hot bed support 20 and / or between the extension 12 and the third fixing member 43, or between the extension 12 and the hot bed support 20 and / or between the hot bed support 20 and the third fixing member 43. This embodiment utilizes this friction to limit the relative movement of the third fixing member 43 within the through hole 120, thereby limiting relative movement between the fifth position of the extension 12 and the hot bed support 20 in the first or second direction, further improving the kinematic rigidity of the 3D printing platform 1 and the stability of the connection. Furthermore, leveling can only be achieved when the force exerted on the hot bed 10 or the hot bed support 20 in the first direction during leveling is greater than the friction. In other possible embodiments, the hot bed 10 may be first leveled at the location of the third fixing member 43, and after leveling is complete, the third fixing member 43 may be used to secure the hot bed 10 and the hot bed support 20 in the first, second, and third directions. Alternatively, the third fixing member 43 can be screwed in with a smaller locking force before leveling, and then the leveling process can be carried out. After the leveling is completed, the third fixing member 43 can be completely locked. In this way, the second fixing member 42 can be used to increase the rigidity and achieve leveling.

[0099] The third fixing member 43 and the second fixing member 42 have similar functions when viewed separately, but the cooperation of the two can improve the rigidity of the printing platform 1 to a certain extent. The reason is that under the cooperation of the third fixing member 43 and the second fixing member 42, the heated bed 10 and the heated bed support 20 can be rigidly fixed in the second direction and the third direction, and are only fixed in the first direction by friction.

[0100] In this embodiment, the through hole 120 is an elongated hole arranged along the first direction. The specific width of the elongated hole can be consistent with the diameter of the second fixing member 42 or the diameter of the third fixing member 43, thereby improving the rigidity of the printing platform 1 to a certain extent. The reason is that the design of the elongated hole allows the heated bed 10 and the heated bed bracket 20 to be rigidly fixed in the second direction and the third direction, and only fixed in the first direction by friction.

[0101] As shown in Figures 4 and 5, in this embodiment, the number of horizontal fixing members 40 includes two fixing members, one of which is located on one side of the other fixing member in the second direction. Alternatively, one fixing member is located on one side of the other fixing member in the third direction. Alternatively, the line connecting one fixing member and the other fixing member has a component in the second direction and a component in the third direction. The third direction is perpendicular to the first direction and the second direction.

[0102] In this embodiment, the number of horizontal fixing members 40 may be two, that is, the number of horizontal fixing members 40 includes two fixing members. There are various embodiments for the relative positions of the two fixing members. In one embodiment, one fixing member is located on one side of the other fixing member in the second direction. In another embodiment, one fixing member is located on one side of the other fixing member in the third direction. In yet another embodiment, the line connecting one fixing member and the other fixing member has a component in the second direction and a component in the third direction. This embodiment is only schematically described with one fixing member located on one side of the other fixing member in the third direction.

[0103] As shown in FIG. 4 and FIG. 5 , in this embodiment, the number of the horizontal fixing members 40 includes at least three fixing members, and the projections of the at least three fixing members on the bearing surface 100 constitute the vertices of a polygon.

[0104] In this embodiment, the number of horizontal fixing members 40 may be more than two, that is, the number of horizontal fixing members 40 includes at least three fixing members, and the projections of the at least three fixing members on the supporting surface 100 form the vertices of a polygon. In this way, the at least three fixing members can be used to cooperate with the heated bed 10 and the heated bed support 20, thereby better limiting the relative movement of the heated bed 10 and the heated bed support 20 and improving the support effect and connection performance of the heated bed 10 and the heated bed support 20.

[0105] Referring again to FIG. 6 , in this embodiment, any one of the leveling components 30 includes a leveling member 31 and a leveling elastic member 32 . The leveling member 31 extends from the supporting surface 100 through the heated bed 10 and is connected to the heated bed support 20 , or the leveling member 31 extends through the heated bed support 20 and is connected to the heated bed 10 . Opposite ends of the leveling elastic member 32 respectively abut against the heated bed support 20 and the heated bed 10 .

[0106] Each leveling assembly 30 may include a leveling member 31 and a leveling elastic member 32, wherein the leveling member 31 connects the heated bed 10 to the shrink fit bracket 20. Specifically, in one embodiment, the leveling member 31 extends from the bearing surface 100 of the heated bed 10 through the heated bed 10 and connects to the heated bed bracket 20. In other embodiments, the leveling member 31 may extend through the heated bed bracket 20 and connect to the heated bed 10. This embodiment is merely illustrated as the leveling member 31 extending through the bearing surface 100 of the heated bed 10 and connecting to the heated bed bracket 20. Opposite ends of the leveling elastic member 32 respectively abut the heated bed 10 and the heated bed bracket 20. Specifically, one end of the leveling elastic member 32 abuts the surface of the heated bed 10 opposite the bearing surface 100, while the other end of the leveling elastic member 32 abuts the surface of the heated bed bracket 20 adjacent to the heated bed 10. Optionally, the leveling member 31 includes, but is not limited to, a leveling screw. Alternatively, the leveling elastic member 32 may be a compression spring or a tension spring.

[0107] This embodiment employs a leveling member 31 and a leveling elastic member 32 disposed between the heated bed 10 and the heated bed support 20. When the leveling member 31 is tightened clockwise, the distance between the first position 101 of the heated bed 10 and the heated bed support 20 gradually decreases. When the leveling member 31 is loosened counterclockwise, the leveling elastic member 32 pushes upward against the heated bed 10, thereby increasing the distance between the first position 101 of the heated bed 10 and the heated bed support 20. In summary, the leveling member 31 and the leveling elastic member 32 can be used to control the distance between the first position 101 of the heated bed 10 and the heated bed support 20.

[0108] Please refer to Figure 12, which is a schematic diagram of a 3D printer in one embodiment of the present application. The 3D printer 2 provided in this embodiment includes a three-dimensional printing head 60, a base 61, a driving device (not shown, which may be a motor), and a 3D printing platform 1 as provided in the above embodiment of the present application, wherein the three-dimensional printing head 60 is arranged above the 3D printing platform 1, and the three-dimensional printing head 60 is used to extrude materials to print models. The hot bed support 20 is slidably connected to the base 61, and the driving device is used to drive the hot bed support 20 and the base 61 to generate horizontal relative displacement. The driving device is also used to drive the three-dimensional printing head 60 to generate vertical and horizontal displacement.

[0109] Exemplarily, the driving device may include a motor, and correspondingly, may also include a synchronous belt, a screw rod, a guide rod, a synchronous pulley or a guide rail, etc. This application does not limit the specific form of the driving device.

[0110] The three-dimensional printing head 60 includes an extrusion component and a hot end. The extrusion component transports the printing material 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 1.

[0111] Illustratively, the hot end includes heat sink fins, a nozzle, and a pipe located between the fins and the nozzle. The printing material passes through the heat sink fins, the pipe, and the nozzle in sequence. Specifically, the nozzle heats the printing material to a molten state, which is then extruded onto the printing platform 1. As the 3D print head 60 and / or the printing platform 1 moves, the nozzle extrudes the molten printing material layer by layer onto different locations on the printing platform 1, thereby producing a printed part.

[0112] The extruder assembly includes a driving wheel and a driven wheel positioned opposite the driving wheel. The printing material passes between the driving and driven wheels. The driving wheel rotates in a first direction, driving the printing material toward the hot end. Rotating in a second direction, opposite the first direction, the driving wheel drives the printing material back out of the extruder assembly.

[0113] The 3D printer 2 provided in this embodiment can improve the rigidity of the 3D printer 2 and improve the leveling accuracy and leveling efficiency by adopting the 3D printing platform 1 provided in the above-mentioned embodiment of the present application.

[0114] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0115] In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "include", "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusions. As used in this application, the term "and / or" includes any and all combinations of one or more of the associated listed items, and the phrase "at least one of A and B" refers to only A, only B, or both A and B.

[0116] The above details the contents provided in the embodiments of the present application, and illustrates and describes the principles and embodiments of the present application. These explanations are only intended to help understand the method and core concept of the present application. However, the contents of this specification should not be construed as limiting the present application. Those skilled in the art may make various changes and modifications to the present application without departing from the spirit and scope of the present application. Such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents.

Claims

1. A 3D printing platform, characterized in that: include: A heated bed, used to heat and support the printing panel or printed parts; A heated bed support, arranged on a side of the heated bed away from a bearing surface, wherein the bearing surface is a side of the heated bed bearing the printing panel or the printed part, and the heated bed and the heated bed support are spaced apart in a first direction, wherein the first direction is perpendicular to the bearing surface; At least two sets of leveling components, the heated bed support is used to support the heated bed in the first direction through the at least two sets of leveling components, wherein any one of the leveling components is respectively connected to the first position of the heated bed and the heated bed support, and is used to adjust the distance between the first position and the heated bed support in the first direction; The horizontal fixing member is used to fix the heating bed and the heating bed support in a second direction, and is used to limit the relative movement of the heating bed and the heating bed support in the second direction, and the second direction is perpendicular to the first direction.

2. The 3D printing platform according to claim 1, characterized in that: The heated bed comprises a body having the bearing surface, and an extension portion located on a side of the body away from the bearing surface, the horizontal fixing member comprises a first fixing member, the first fixing member is used to fix a second position on the extension portion to the heated bed bracket to limit relative movement of the second position and the heated bed bracket, and the at least two sets of leveling components and the projection of the second position on the bearing surface constitute vertices of a polygon.

3. The 3D printing platform according to claim 2, characterized in that: The number of the first fixing members is one; the at least two groups of leveling components consist of two groups of leveling components, and the two groups of leveling components and the projection of the second position on the bearing surface constitute the vertices of a triangle; or, the at least two groups of leveling components consist of three groups of leveling components, and the three groups of leveling components and the projection of the second position on the bearing surface constitute the vertices of a quadrilateral.

4. The 3D printing platform according to any one of claims 1 to 3, characterized in that: The 3D printing platform also includes: a vertical fixing member, which is used to fix the third position of the hot bed to the hot bed bracket to limit the relative movement of the third position and the hot bed bracket, and the at least two groups of leveling components and the projection of the third position on the bearing surface constitute the vertices of the polygon.

5. The 3D printing platform according to any one of claims 1 to 4, characterized in that: The at least two groups of leveling components are at least three groups of leveling components, and the projections of the at least three groups of leveling components on the bearing surface constitute vertices of a polygon.

6. The 3D printing platform according to any one of claims 1 to 5, characterized in that: The heated bed comprises a body having the bearing surface, and an extension portion located on a side of the body away from the bearing surface, and the horizontal fixing member comprises a second fixing member, which is a fixing screw; The second fixing member passes through the through hole at the fourth position on the extension part and is connected to the screw hole on the heating bed bracket, the aperture of the through hole is larger than the diameter of the second fixing member, and there is friction between the extension part and the heating bed bracket and / or between the extension part and the second fixing member; or, the second fixing member passes through the through hole on the heating bed bracket and is connected to the screw hole at the fourth position, the aperture of the through hole is larger than the diameter of the second fixing member, and there is friction between the extension part and the heating bed bracket and / or between the heating bed bracket and the second fixing member; The axial direction of the second fixing member is the second direction, and the friction force is used to limit the movement of the second fixing member in the second direction. The fourth position is used to limit the relative movement between the fourth position and the heated bed support in the first direction or the third direction, wherein the third direction is perpendicular to the first direction and the second direction respectively.

7. The 3D printing platform according to claim 6, characterized in that: The horizontal fixing member further includes a third fixing member, and the third fixing member is a fixing screw; The third fixing member passes through the through hole at the fifth position on the extension part and is connected to the screw hole on the heating bed bracket. The diameter of the through hole is larger than the diameter of the third fixing member, and there is friction between the extension part and the heating bed bracket and / or between the extension part and the third fixing member; or, the third fixing member passes through the through hole on the heating bed bracket and is connected to the screw hole at the fifth position. The diameter of the through hole is larger than the diameter of the third fixing member, and there is friction between the extension part and the heating bed bracket and / or between the heating bed bracket and the third fixing member; The axial direction of the third fixing member is the third direction, and the friction force is used to limit the relative movement of the third fixing member within the range of the through hole, thereby limiting the relative movement of the fifth position and the heated bed support in the first direction or the second direction.

8. The 3D printing platform according to any one of claims 6 to 7, characterized in that: The through hole is an elongated hole arranged along the first direction.

9. The 3D printing platform according to any one of claims 1 to 8, characterized in that: The number of the horizontal fixing members includes two fixing members, one of which is located on one side of the other fixing member in the second direction; or, one fixing member is located on one side of the other fixing member in the third direction; or, a line between one fixing member and the other fixing member has a component in the second direction and a component in the third direction; wherein the third direction is perpendicular to the first direction and the second direction, respectively.

10. The 3D printing platform according to any one of claims 1 to 9, characterized in that: The number of the horizontal fixing members includes at least three fixing members, and the projections of the at least three fixing members on the bearing surface constitute vertices of a polygon.

11. The 3D printing platform according to any one of claims 1 to 10, characterized in that: Any one of the leveling components includes a leveling member and a leveling elastic member, wherein the leveling member passes through the heated bed from the bearing surface and is connected to the heated bed bracket, or the leveling member passes through the heated bed bracket and is connected to the heated bed, and opposite ends of the leveling elastic member respectively abut against the heated bed bracket and the heated bed.

12. The 3D printing platform according to any one of claims 1 to 11, characterized in that: The heated bed support is connected to a pulley, and a sliding direction corresponding to the pulley is a second direction or a third direction, wherein the third direction is perpendicular to the first direction and the second direction respectively.

13. A 3D printer, characterized in that: include: A 3D printing head, a base, a driving device, and a 3D printing platform as described in any one of claims 1 to 12, wherein the 3D printing head is arranged above the 3D printing platform, and the 3D printing head is used to extrude materials to print models; the heated bed support is slidably connected to the base, and the driving device is used to drive the relative displacement between the heated bed support and the base.

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