CN117507352A

CN117507352A - 3D print platform and 3D printer

Info

Publication number: CN117507352A
Application number: CN202311666220.3A
Authority: CN
Inventors: 田开望; 熊荣明
Original assignee: Shenzhen Tuozhu Technology Co Ltd
Current assignee: Shenzhen Tuozhu Technology Co Ltd
Priority date: 2023-12-06
Filing date: 2023-12-06
Publication date: 2024-02-06

Abstract

The application provides 3D print platform and 3D printer, 3D print platform include hot bed, hot bed support, two sets of leveling components and horizontal mounting. The hot bed is used for heating and bearing the printing panel or the printing piece, the hot bed support is arranged on one side of the hot bed, which is away from the bearing surface, and the hot bed support are spaced in a first direction, and the first direction is perpendicular to the bearing surface. The hot bed support is used for supporting the hot bed in a first direction through at least two groups of leveling components, wherein any leveling component is respectively connected with a first position of the hot bed and the hot bed support and used for adjusting the distance between the first position and the hot bed support in the first direction. The horizontal fixing piece is used for fixedly connecting the hot bed and the hot bed support in a second direction and limiting the relative movement of the hot bed and the hot bed support in the second direction, and the second direction is perpendicular to the first direction. The application can improve 3D print platform's motion rigidity through addding the horizontal mounting.

Description

3D print platform and 3D printer

Technical Field

The application belongs to the technical field, and in particular relates to a 3D printing platform and a 3D printer.

Background

A 3D printer (also known as a three-dimensional printer or a stereoscopic printer) is a process device for rapid prototyping. The 3D printing technology currently adopted by the 3D printer is fused deposition modeling (fused deposition modeling, FDM), which is a technology for constructing a three-dimensional object by using a layer-by-layer printing mode by using materials such as powdered metal or plastic based on a digital model. In a specific implementation, a three-dimensional printer adopting the FDM technology is characterized in that a feeding mechanism supplies hot-melt filamentary material (wire or stockline) to a hot end, and the hot-melt filamentary material is heated to a molten state in the hot end. The hot-end nozzles can extrude the molten material onto the printing platform while moving along the printing path of the three-dimensional printer, and the three-dimensional object can be printed layer by layer.

When the 3D printer works, the printing platform and the hot end can generate relative displacement, the bearing surface of the printing platform and the plane of the hot end which is in XY direction movement travel relative to the printing platform are required to be parallel as much as possible, and at present, a leveling mechanism of screws and springs is generally adopted to adjust the angle of the bearing surface of the hot bed.

Disclosure of Invention

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

a thermal bed for heating and carrying a print panel or print;

the thermal bed support is arranged on one side of the thermal bed, which is away from the bearing surface, the bearing surface is one surface of the thermal bed, which bears the printing panel or the printing piece, and the thermal bed support are spaced in a first direction, and the first direction is perpendicular to the bearing surface;

the hot bed support is used for supporting the hot bed in the first direction through the at least two groups of leveling components, wherein any leveling component is respectively connected with a first position of the hot bed and the hot bed support and used for adjusting the distance between the first position and the hot bed support in the first direction;

the horizontal fixing piece is used for fixedly connecting the hot bed with the hot bed support in a second direction and limiting the relative movement of the hot bed and the hot bed support in the second direction, and the second direction is perpendicular to the first direction.

The 3D printing platform provided by the first aspect of the application utilizes at least two groups or at least three groups of leveling components to respectively connect the first position of the hot bed and the hot bed support in the first direction, adjusts the distance between the first position of the hot bed and the hot bed in the first direction, and accordingly levels the hot bed. But leveling subassembly can not realize the rigid connection of hot bed and hot bed support for rigidity is relatively poor when hot bed support drives hot bed motion, consequently this application add horizontal mounting, utilize horizontal mounting to connect hot bed and hot bed support in the second direction mutually perpendicular with first direction, thereby carry out fixed connection with hot bed and hot bed support in the second direction, thereby spacing hot bed and hot bed support in the relative movement of second direction, avoid rocking in the second direction between hot bed and the hot bed support, improved rigidity between hot bed and the hot bed support, thereby can promote the printing effect.

In one possible embodiment, the thermal bed comprises a body with the bearing surface and an extension part positioned on one side of the body away from the bearing surface, the horizontal fixing part comprises a first fixing part, the first fixing part is used for fixedly connecting a second position on the extension part with the thermal bed support so as to limit the relative movement of the second position and the thermal bed support, and the at least two groups of leveling components and the projection of the second position on the bearing surface form the vertex of a polygon. Because the position relation between the hot bed and the hot bed bracket at the first fixing piece is fixed, the first fixing piece can be used as a reference point for leveling the hot bed to adjust at least two groups of leveling components at other positions so as to finish leveling, thereby improving the accuracy of leveling the hot bed and the leveling efficiency.

Wherein the number of the first fixing pieces is one; the at least two groups of leveling assemblies are composed of two groups of leveling assemblies, and the projections of the two groups of leveling assemblies and the second position on the bearing surface form the vertexes 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 bearing surface form vertexes of a quadrilateral. The first fixing piece and the leveling component are respectively positioned at the vertexes of the polygon, and therefore are positioned at different positions.

In one possible embodiment, the printing platform further comprises: the vertical fixing piece is used for fixedly connecting the third position of the hot bed with the hot bed support so as to limit the relative movement of the third position and the hot bed support, and the projections of the at least two groups of leveling components and the third position on the bearing surface form the vertexes of a polygon. Because the position relation between the hot bed and the hot bed bracket at the vertical fixing piece is fixed, the vertical fixing piece can be used as a reference point for hot bed leveling to adjust at least two groups of leveling components at other positions so as to finish leveling, thereby improving the accuracy of hot bed leveling and the leveling efficiency.

Wherein the number of the vertical fixing pieces is one; the at least two groups of leveling assemblies consist of two groups of leveling assemblies, and the projections of the two groups of leveling assemblies and the third position on the bearing surface form the vertexes 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 third position on the bearing surface form vertexes of a quadrilateral. The vertical fixing member and the leveling assembly are each located at the vertices of the polygon and thus at different positions.

In one possible embodiment, the at least two sets of leveling components are at least three sets of leveling components, and projections of the at least three sets of leveling components on the bearing surface form vertices of a polygon.

In one possible embodiment, the thermal bed comprises a body with the bearing surface and an extension part positioned on one side of the body away from the bearing surface, and the horizontal fixing piece comprises a second fixing piece, wherein the second fixing piece is a fixing screw; the second fixing piece penetrates through a through hole at a fourth position on the extension part and is connected with a screw hole on the hot bed support, the aperture of the through hole is larger than the diameter of the second fixing piece, and friction force exists between the extension part and the hot bed support and/or between the extension part and the second fixing piece; or the second fixing piece penetrates through the through hole on the hot bed support and is connected with the screw hole at the fourth position, the aperture of the through hole is larger than the diameter of the second fixing piece, and friction force exists between the extension part and the hot bed support and/or between the hot bed support and the second fixing piece; the axial direction of the second fixing piece is the second direction, and the relative movement of the second fixing piece in the range of the through hole is limited through the friction force, so that the relative movement of the fourth position and the hot bed support in the first direction or the third direction is limited, wherein the third direction is perpendicular to the first direction and the second direction respectively. Because the aperture of the through hole is larger than the diameter of the second fixing piece, not only can the leveling of the hot bed at the position of the second fixing piece be realized (for example, the leveling is performed by using a leveling force larger than friction force), but also the rigidity between the hot bed and the hot bed bracket in the first direction, the second direction and the third direction can be increased; or, because the aperture of the through hole is larger than the diameter of the second fixing piece, the leveling of the hot bed at the position of the second fixing piece can be performed first, and after the leveling is finished, the second fixing piece is used for fixing the hot bed and the hot bed bracket in the first direction, the second direction and the third direction.

Wherein the through hole is an elongated hole provided along the first direction. The heat bed and the heat bed support can be rigidly fixed in the second direction and the third direction, and the heat bed is fixed only in the first direction depending on friction, so that the fixing effect is better, and the leveling of the heat bed is allowed.

The horizontal fixing piece further comprises a third fixing piece, and the third fixing piece is a fixing screw; the third fixing piece penetrates through a through hole at a fifth position on the extension part and is connected with a screw hole on the hot bed support, the aperture of the through hole is larger than the diameter of the third fixing piece, and friction force exists between the extension part and the hot bed support and/or between the extension part and the third fixing piece; or the third fixing piece penetrates through the through hole on the hot bed support and is connected with the screw hole at the fifth position, the aperture of the through hole is larger than the diameter of the third fixing piece, and friction force exists between the extension part and the hot bed support and/or between the hot bed support and the third fixing piece; the axial direction of the third fixing piece is the third direction, and the relative movement of the third fixing piece in the range of the through hole is limited by the friction force, so that the fifth position and the relative movement of the hot bed support in the first direction or the second direction are limited. Because the aperture of the through hole is larger than the diameter of the third fixing piece, not only can the leveling of the hot bed at the position of the third fixing piece be realized (for example, the leveling is performed by using a leveling force larger than friction force), but also the rigidity between the hot bed and the hot bed bracket in the first direction, the second direction and the third direction can be increased; or, because the aperture of the through hole is larger than the diameter of the third fixing piece, the leveling of the hot bed at the position of the third fixing piece can be performed first, and after the leveling is finished, the third fixing piece is used for fixing the hot bed and the hot bed bracket in the first direction, the second direction and the third direction. And moreover, the third fixing piece is matched with the second fixing piece, so that the rigid fixation between the hot bed and the hot bed support in the second direction and the third direction can be realized, the fixation is performed only in the first direction depending on friction force, the fixation effect is better, and the leveling of the hot bed is allowed.

Wherein the through hole is an elongated hole provided along the first direction.

In one possible embodiment, the number of horizontal fixing members includes two fixing members, one of which is located at 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 between one fixture and the other 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.

The horizontal fixing piece can be composed of a first fixing piece and a second fixing piece, and the second fixing piece is positioned on one side of the first fixing piece in the second direction; alternatively, the second fixing member is located at one side of the first fixing member in the third direction.

Wherein, the contained angle between the connecting line and the second direction and the contained angle between the connecting line and the third direction are all 45 degrees.

In one possible embodiment, the number of horizontal fixing elements comprises at least three fixing elements, the projections of which on the support surface form the vertices of a polygon. Wherein three or four second fixtures may be included.

In one possible implementation manner, any leveling component comprises a leveling piece and a leveling elastic piece, wherein the leveling piece penetrates through the hot bed from the bearing surface and is connected with the hot bed support or penetrates through the hot bed support and is connected with the hot bed, and two opposite ends of the leveling elastic piece respectively support against the hot bed support and the hot bed.

In one possible implementation manner, the hot bed support is connected with a pulley, and the 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.

In one possible embodiment, the hot bed support is connected to a pulley, and the sliding direction of the pulley is a fourth direction having a component in the second direction and a component in the third direction. Specifically, the included angles between the fourth direction and the second and third directions are 45 degrees.

A second aspect of the present application provides a 3D printer comprising: a three-dimensional printing head, a base, a driving device and a 3D printing platform provided in the first aspect of the application, wherein the three-dimensional printing head is arranged above the 3D printing platform and is used for extruding materials to print a model; the hot bed support is in sliding connection with the base, and the driving device is used for driving the hot bed support to generate relative displacement with the base.

The 3D printer that this application second aspect provided through adopting the 3D print platform that this application first aspect provided, can improve the rigidity of 3D printer and improve the accuracy of leveling and improve leveling efficiency.

Drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be described below.

Fig. 1 is a schematic perspective view of a 3D printing platform according to an embodiment of the present application.

Fig. 2 is a schematic perspective view of another view angle of the 3D printing platform shown in fig. 1.

Fig. 3 is a schematic perspective view of the 3D printing platform shown in fig. 2 with the thermal bed removed from the housing.

Fig. 4 is an exploded view of the 3D printing platform shown in fig. 3.

Fig. 5 is an exploded view of the 3D printing platform of fig. 4 from another perspective.

Fig. 6 is a schematic cross-sectional view of the 3D printing platform shown in fig. 3.

Fig. 7 is a partial schematic view of the 3D printing platform shown in fig. 6.

Fig. 8 is an exploded view of a 3D printing platform according to another embodiment of the present application.

Fig. 9 is a schematic cross-sectional view of a 3D printing platform according to another embodiment of the present application.

Fig. 10 is a schematic cross-sectional view of a 3D printing platform according to another embodiment of the present application.

Fig. 11 is a schematic cross-sectional view of a 3D printing platform according to still another embodiment of the present application.

Fig. 12 is a schematic diagram of a 3D printer according to an embodiment of the present application.

Description of the reference numerals:

the three-dimensional printing device comprises a 3D printing platform-1, a 3D printer-2, a hot bed-10, a bearing surface-100, a first position-101, a second position-102, a body-11, an extension part-12, a through hole-120, a housing-13, a hot bed bracket-20, a pulley-21, a leveling component-30, a first leveling component-301, a second leveling component-302, a leveling piece-31, a leveling elastic piece-32, a horizontal fixing piece-40, a first fixing piece-41, a head-411, a rod part-412, an elastic piece-413, a second fixing piece-42, a first fixing screw-421, a second fixing screw-422, a third fixing piece-43, a vertical fixing piece-50, a three-dimensional printing head-60, a base-61 and a sliding rail-610.

Detailed Description

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

In the present application, unless explicitly specified and limited otherwise, the terms "fixed," "disposed," "mounted," "connected," and "connected" may mean that one element is directly on another element or that there may be intermediate elements, and "fixed" may be understood as "fixedly connected," "disposed," "mounted," and "connected" may be understood as a connection. Meanwhile, the connection may include a mechanical connection or a structural connection, and may be understood as an electrical connection, a thermal connection, or a communication connection. For mechanical or structural connections, the connection includes removable and non-removable connections, e.g., the fixed connection may include removable fixed connections, non-removable fixed connections, or integrally formed, the rotational connection may include removable rotational connections and non-removable rotational connections, and the sliding connection may include removable sliding connections and non-removable sliding connections. The connection may be direct or indirect via a component. For example, wherein the detachably fixed connection means that the positional relationship between at least two objects connected in the mounted state can be fixed; similarly, there are also rotational connections, sliding connections, etc.

The terms "parallel", "perpendicular", "co-directional" are intended to be relative to the state of the art and are not strictly defined in a mathematical sense, allowing for small deviations. For example, a is parallel to B, meaning that a is parallel or approximately parallel to B, and the angle between a and B may be between 0 ° and 10 °; for another example, a is perpendicular to B, meaning that a is perpendicular or approximately perpendicular to B, and the angle between a and B may be between 80 ° and 100 °; for another example, the directions of A and B are the same, meaning that the directions of A and B are parallel or approximately parallel, and the included angle between A and B is between 0 DEG and 10 deg.

The terms "rigid", "rigidly connected", "rigidly fixed" are not absolutely deformation in a physical sense, and in this application "rigid", "rigidly connected", "rigidly fixed" allow for a small amount of deformation.

Referring to fig. 1 to fig. 6, fig. 1 is a schematic perspective view of a 3D printing platform according to an embodiment of the present application. Fig. 2 is a schematic perspective view of another view angle of the 3D printing platform shown in fig. 1. Fig. 3 is a schematic perspective view of the 3D printing platform shown in fig. 2 with the thermal bed removed from the housing. Fig. 4 is an exploded view of the 3D printing platform shown in fig. 3. Fig. 5 is an exploded view of the 3D printing platform of fig. 4 from another perspective. Fig. 6 is a schematic cross-sectional view of the 3D printing platform shown in fig. 3.

The 3D printing platform 1 provided in this embodiment includes a thermal bed 10, a thermal bed bracket 20, a leveling assembly 30, and a horizontal fixture 40. The thermal bed 10 is used for heating and carrying a printing panel or a printing piece, the thermal bed support 20 is disposed on one side of the thermal bed 10 away from the carrying surface 100, the carrying surface 100 is a surface of the thermal bed 10 carrying the printing panel or the printing piece, the thermal bed 10 and the thermal bed support 20 have a space in a first direction, the first direction is perpendicular to the carrying surface 100, and the first direction may also be referred to as a Z-axis direction. The thermal bed support 20 is configured to support the thermal bed 10 in the first direction by the at least two sets of leveling assemblies 30, wherein any leveling assembly 30 is respectively connected to the first position 101 of the thermal bed 10 and the thermal bed support 20, and is configured to adjust a distance between the first position 101 and the thermal bed support 20 in the first direction. The horizontal fixing member 40 is used for fixedly connecting the thermal bed 10 and the thermal bed support 20 in a second direction, and is used for limiting the relative movement of the thermal bed 10 and the thermal bed support 20 in the second direction, and the second direction is perpendicular to the first direction. The second direction may be an X-axis direction, a Y-axis direction, or other directions perpendicular to the Z-axis direction.

Wherein not all leveling assemblies 30 share one first position 101, but each leveling assembly 30 has a respective first position 101.

The horizontal fixing member 40 may be detachable, i.e. may be fixed by using the horizontal fixing member 40 after leveling is completed based on actual requirements, or may be fixed by using the horizontal fixing member 40 before leveling to promote stability in the leveling process.

The 3D printing platform 1 in this embodiment mainly includes a thermal bed 10, a thermal bed bracket 20, at least two sets of leveling assemblies 30, and a horizontal fixture 40. The thermal bed 10 is mainly used for bearing a printing panel or a printing piece, and provides a bearing foundation for the printing panel or the printing piece, and the printing panel is used for bearing the printing piece. Therefore, the surface of the thermal bed 10 for carrying the print panel or print element is referred to as the carrying surface 100, in other words, as shown in fig. 1 and 4, the upper surface of the thermal bed 10 is the carrying surface 100. And the thermal bed 10 can also be used to heat a print panel or print, the purpose of which is to heat the print panel to heat the print, thereby improving print quality.

The hot bed support 20 is a support of the hot bed 10, and is mainly used for supporting and installing the hot bed 10. The thermal bed support 20 may be disposed on a side of the thermal bed 10 facing away from the bearing surface 100, in other words, as shown in fig. 4, the thermal bed support 20 is disposed on a lower surface of the thermal bed 10. The hot bed support 20 can be in sliding connection with the Y-axis section bar, so that the hot bed support 20 can slide, and the hot bed 10 arranged on the hot bed support 20 is driven to slide, so that the relative displacement between the three-dimensional printing head and the hot bed in the Y-axis direction is realized.

Optionally, the hot bed support 20 is connected to the pulley 21, specifically, a pulley 21 is disposed on a side of the hot bed support 20 facing away from the hot bed 10, a sliding rail 610 is disposed on a Y-axis profile of the base 61, and the pulley 21 and the sliding rail 610 can be used to realize a relative sliding motion of the hot bed support 20 along a Y-axis direction relative to the Y-axis profile, where the Y-axis direction may be the second direction or the third direction. The hot bed frame 20 and the hot bed 10 are disposed at intervals in a direction perpendicular to the carrying surface 100, and the direction perpendicular to the carrying surface 100 will be referred to as a first direction in this embodiment and hereinafter. In other words, the thermal bed support 20 is not in contact with the thermal bed 10 in the first direction but is spaced apart from the thermal bed 10 to facilitate the leveling assembly 30 adjusting the spacing of the thermal bed support 20 from the thermal bed 10 in the first direction to achieve leveling. In addition, if the carrying surface 100 of the thermal bed 10 is considered as a surface composed of an X direction and a Y direction, the first direction is the Z direction.

The leveling assembly 30 is mainly used for supporting and leveling. Specifically, the leveling assembly 30 connects the first location 101 of the thermal bed 10 with the thermal bed support 20 in a first direction such that the thermal bed 10 is spaced from the thermal bed support 20 in the first direction. It is also understood that the first position 101 of the thermal bed 10 and the thermal bed support 20 are spaced apart in a first direction. The first position 101 mentioned above is understood to be the position where the leveling assembly 30 is connected to the thermal bed 10. Because the leveling assembly 30 connects the thermal bed 10 with the thermal bed support 20, the thermal bed support 20 may support the thermal bed 10 in a first direction through the leveling assembly 30. In addition, the leveling assembly 30 can also adjust the distance between the first position 101 of the thermal bed 10 and the thermal bed support 20 in the first direction, so as to change the angle of the bearing surface 100 of the thermal bed 10, and realize the leveling effect. How the leveling assembly 30 levels is described in detail below.

The horizontal fixing member 40 serves to connect the hot bed 10 with the hot bed bracket 20 in other directions. For example, the horizontal fixing member 40 fixedly connects the thermal bed 10 and the thermal bed support 20 in the second direction, and at this time, at the position of the horizontal fixing member 40, there may be no space between the thermal bed 10 and the thermal bed support 20 in the second direction, that is, at the position of the horizontal fixing member 40, the thermal bed 10 is abutted against the thermal bed support 20. Wherein, the position of the horizontal fixing member 40 is the position where the horizontal fixing member 40 is connected with the hot bed 10. The second direction is perpendicular to the first direction, and if the first direction is the Z-axis direction, the second direction is the X-axis direction, the Y-axis direction or other directions perpendicular to the Z-axis direction, for example, the included angles between the second direction and the X-axis direction and between the second direction and the Y-axis direction are all 45 degrees. This limits the relative movement of the thermal bed 10 and the thermal bed support 20 in the second direction by means of the horizontal fixing member 40.

In summary, by the above arrangement, the horizontal fixing member 40 can be used to limit the thermal bed 10 and the thermal bed support 20, so as to avoid shaking between the thermal bed 10 and the thermal bed support 20, and improve the rigidity between the thermal bed 10 and the thermal bed support 20. In addition, the horizontal fixing piece 40 can be used as a reference point for leveling the hot bed 10, so that the leveling accuracy of the hot bed 10 is improved and the leveling efficiency is improved.

It should be noted that the number of leveling assemblies 30 in the present embodiment is at least two, and each leveling assembly 30 is respectively connected to the first position 101 of the thermal bed 10 and the thermal bed support 20, and each leveling assembly 30 is used for adjusting the distance between the first position 101 of the thermal bed 10 and the thermal bed support 20 in the first direction. This allows the projection of at least two sets of leveling assemblies 30 and one fixture (including but not limited to horizontal fixture 40 or vertical fixture 50) onto the load surface 100 to create at least three point coplanarity.

Referring to fig. 4-6 again, in the present embodiment, the thermal bed 10 includes a body 11 having the bearing surface 100, and an extension portion 12 located on a side of the body 11 facing away from the bearing surface 100, the horizontal fixing member 40 includes a first fixing member 41, the first fixing member 41 is used to fixedly connect the second position 102 on the extension portion 12 with the thermal bed support 20 so as to limit the relative movement between the second position 102 and the thermal bed support 20, and the projections of the at least two leveling assemblies 30 and the second position 102 on the bearing surface 100 form vertices of a polygon. The first fixing member 41 fixes the relative position between the second position 102 and the hot bed support 20, but does not limit the hot bed 10 to rotate around the first fixing member 41 relative to the hot bed support 20, so that the first fixing member 41 can be used as a reference point for leveling the hot bed 10, thereby improving the accuracy of leveling the hot bed 10 and the leveling efficiency. For example, in the leveling process by the leveling assembly 30 at the position of the first fixing member 41, the thermal bed 10 can rotate around the first fixing member 41, thereby changing the angle of the bearing surface 100 of the thermal bed 10, and achieving the leveling purpose. Optionally, the second location 102 is different from the first location 101.

Wherein not all first fixtures 41 share one second location 102, but each first fixture 41 has a respective second location 102.

The thermal bed 10 includes a main body 11 and an extension portion 12, wherein the main body 11 is a portion for heating and carrying a printing panel or a printing member, and thus the carrying surface 100 is an upper surface of the main body 11. The extension portion 12 is located at a side of the body 11 facing away from the bearing surface 100, that is, the extension portion 12 is disposed on the lower surface of the body 11, the extension portion 12 may be disposed corresponding to a sidewall of the thermal bed support 20, so as to provide a foundation for the horizontal fixing member 40 to connect the extension portion 12 and the thermal bed support 20, and at this time, the extension portion 12 may also be referred to as a rib for fixing the horizontal fixing member 40.

The horizontal fixing member 40 includes a first fixing member 41, wherein the first fixing member 41 is the above-mentioned member fixedly connecting the thermal bed 10 and the thermal bed support 20 in the second direction. Specifically, the first fixing member 41 fixedly connects the extension portion 12 and the side wall of the hot bed support 20 in the second direction, and the position where the first fixing member 41 connects the extension portion 12 is the above-mentioned second position 102. The extension 12 and the first fixing member 41 can limit the relative movement between the second position 102 and the thermal bed support 20, so as to improve the rigidity of the 3D printing platform 1. And the projections of at least two groups of leveling components 30 and the second position 102 on the bearing surface 100 form the vertexes of a polygon, so that at least three points can be arranged in a coplanar manner, thereby ensuring the supporting and connecting performance of the 3D printing platform 1. In addition, the first fixing piece 41 can be used as a leveling reference point of the 3D printing platform, so that the hot bed 10 rotates around the first fixing piece 41 relative to the hot bed bracket 20, and the leveling difficulty is reduced.

In one possible implementation, the number of first fixtures 41 is one; the at least two groups of leveling components consist of two groups of leveling components, and the projections of the two groups of leveling components and the second position 102 on the bearing surface form the vertexes of a triangle; alternatively, the at least two sets of leveling assemblies are comprised of three sets of leveling assemblies, and the three sets of leveling assemblies and the projection of the second location 102 onto the bearing surface form the vertices of a quadrilateral.

Optionally, as shown in fig. 2, the thermal bed 10 may further include a housing 13, where the housing 13 is detachably disposed on a side of the body 11 facing away from the carrying surface 100 and surrounds the periphery of the extension portion 12, and at least a portion of the thermal bed support 20 is disposed in the housing 13, so that the housing 13 is used to effectively protect the thermal bed support 20 and components on the thermal bed 10.

Referring to fig. 4-6 again, in the present embodiment, the first fixing member 41 is a fixing screw, the first fixing member 41 penetrates through the through hole 120 at the second position 102 and is connected to the screw hole on the hot bed support 20, or the first fixing member 41 penetrates through the through hole 120 on the hot bed support 20 and is connected to the screw hole at the second position 102, and the diameter of the first fixing member 41 is identical to the aperture of the through hole 120. Such that the first fixing member 41 fixes the relative position of the second position 102 and the hot bed support 20, but does not restrict the rotation of the hot bed 10 relative to the hot bed support 20 about the first fixing member 41.

In this embodiment, the first fixing member 41 may be a fixing screw or a transverse screw, and in order to achieve the fixed connection between the extension portion 12 and the hot bed support 20, in one embodiment, a through hole 120 may be formed at the second position 102 of the extension portion 12, that is, a through hole 120 is added at a position corresponding to the first fixing member 41 to lock the screw. At the same time, screw holes are formed on the hot bed support 20, so that the first fixing piece 41 penetrates through the through hole 120 at the second position 102 and is connected with the screw holes on the hot bed support 20. In other embodiments, the through hole 120 may be formed in the hot bed support 20, and the screw hole may be formed in the second position 102 of the extension portion 12, so that the first fixing member 41 penetrates the through hole 120 in the hot bed support 20 and is connected to the screw hole at the second position 102. In this embodiment, only the screw holes penetrating the through hole 120 at the second position 102 and connecting the hot bed frame 20 are schematically illustrated by the first fixing member 41.

In addition, in the present embodiment, the diameter of the first fixing member 41 is consistent with the aperture of the through hole 120, so that the first fixing member 41 not only can limit the mutual movement of the thermal bed 10 and the thermal bed support 20 in the second direction, but also can limit the mutual movement of the thermal bed 10 and the thermal bed support 20 in the first direction and the third direction, thereby improving the rigidity, the support and the connection performance of the 3D printing platform 1. The first fixing piece 41 can be screwed into the first fixing piece 41 with smaller locking force before leveling, then leveling process is carried out, and the first fixing piece 41 is completely locked after leveling is finished, so that the rigidity can be improved by using the first fixing piece 41, and leveling can be assisted by using the first fixing piece 41.

It is noted that when the first fixing member 41 fixedly connects the extension portion 12 and the hot bed support 20 together, there is a frictional force between the extension portion 12 and the hot bed support 20 and/or between the extension portion 12 and the first fixing member 41. Alternatively, friction exists between the extension 12 and the hot bed support 20 and/or between the hot bed support 20 and the first fixing member 41, and the axial rotation of the hot bed 10 relative to the hot bed support 20 around the first fixing member 41 can be limited by the friction, so that the hot bed 10 can be prevented from rotating relative to the hot bed support 20 at will when the first fixing member 41 is fixedly connected. And the leveling can be realized under the condition that the rotation force generated during the leveling is larger than the friction force.

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, and the projections of the at least three sets of leveling assemblies 30 on the bearing surface 100 form vertices of a polygon. In this embodiment, the number of the leveling assemblies 30 is at least three, and the projections of the at least three leveling assemblies 30 on the carrying surface 100 of the thermal bed 10 form the vertices of a polygon, i.e. the at least three leveling assemblies 30 can form three points to be coplanar, so that the connection performance and the supporting effect of the thermal bed 10 and the thermal bed support 20 can be achieved by using only the leveling assemblies 30.

Referring to fig. 7, fig. 7 is a partial schematic view of the 3D printing platform shown in fig. 6. In this embodiment, the 3D printing platform 1 may further include an elastic member 413, where the first fixing member 41 includes a head 411 and a rod 412 connected to each other, the rod 412 connects the second position 102 of the extension portion 12 and the hot bed support 20, the head 411 is located at a side of the extension portion 12 away from the hot bed support 20, and the elastic member 413 can be abutted between the second position 102 of the extension portion 12 and the head 411 in a compressed state.

When the first fixing member 41 is a fixing screw, the fixing screw generally includes a threaded head and a threaded rod, wherein the threaded head is the head 411, and the threaded rod is the shaft 412, and the embodiment can enable the shaft 412 to penetrate through the second position 102 of the extension portion 12 and connect with the hot bed support 20, and at this time, an elastic member 413 can be additionally arranged, and the elastic member 413 is abutted between the second position 102 of the extension portion 12 and the head 411 in a compressed state, so that the locking force of the first fixing member 41 can be controlled, and the second position 102 of the extension portion 12 and the hot bed support 20 have no gap, but are not completely locked, and can rotate around the fixing member. Specifically, when the first fixing member 41 is locked to the bottom, the elastic member 413 is compressed, but not completely pressed, so that the elastic member 413 generates a certain pressing force, thereby realizing a function that the two extension portions 12 and the hot bed support 20 are not spaced, but are not completely locked, and can rotate around the first fixing member 41, thereby adjusting the degree of freedom of the hot bed 10 in the left-right direction. Alternatively, the resilient member 413 includes, but is not limited to, a dome or a spring. Alternatively, such an elastic member 413 may be provided for other horizontal fixing members 40 to be described later.

Referring to fig. 8, fig. 8 is an exploded view of a 3D printing platform according to another embodiment of the present application. In this embodiment, the printing platform further includes a vertical fixing member 50, where the vertical fixing member 50 is configured to fixedly connect the third position of the thermal bed 10 with the thermal bed support 20, so as to limit the relative movement between the third position and the thermal bed support 20, and the projections of the at least two sets of leveling assemblies 30 and the third position on the bearing surface 100 form vertices of a polygon.

In another embodiment, a vertical fixing member 50 may be added to the horizontal fixing member 40, and the vertical fixing member 50 may fixedly connect the third position of the thermal bed 10 with the thermal bed support 20 in the first direction, where the position of the vertical fixing member 50 connected to the thermal bed 10 is the above-mentioned third position. Thereby, the relative movement of the third position of the thermal bed 10 and the thermal bed support 20 in the first direction can be restricted as well, and the relative movement of the third position of the thermal bed 10 and the thermal bed support 20 in the second direction and the third direction can be further restricted, so that the rigidity of the 3D printing platform 1 is improved to achieve the effect similar to the first fixing piece 41, and therefore, in the present embodiment, the vertical fixing piece 50 can be used instead of the first fixing piece 41. And at least two sets of leveling components 30 and the projection of the third position on the bearing surface 100 form the vertexes of a polygon, so that at least three points can be arranged in a coplanar manner, thereby improving the supporting and connecting performance of the 3D printing platform 1.

Wherein not all vertical fixtures 50 share one third position, but each vertical fixture 50 has a respective third position.

In this embodiment, the vertical fixing member 50 is a fixing screw, and the vertical fixing member 50 penetrates through the through hole 120 at the third position and is connected to the screw hole on the hot bed support 20, or the vertical fixing member 50 penetrates through the through hole 120 on the hot bed support 20 and is connected to the screw hole at the third position, and the diameter of the vertical fixing member 50 is consistent with the aperture of the through hole 120. Such that the vertical fixing member 50 fixes the relative position of the third position and the hot bed stand 20.

The vertical fixing member 50 may be a fixing screw, and in order to achieve the fixed connection between the thermal bed 10 and the thermal bed support 20, in one embodiment, a through hole 120 may be formed at a third position of the thermal bed 10, and a screw hole may be formed in the thermal bed support 20, so that the vertical fixing member 50 penetrates through the through hole 120 at the third position and is connected to the screw hole in the thermal bed support 20. In other embodiments, the through hole 120 may be formed in the hot bed support 20, and the screw hole may be formed in the third position of the hot bed 10, so that the vertical fixing member 50 penetrates through the through hole 120 in the hot bed support 20 and is connected to the screw hole in the third position. The present embodiment is schematically illustrated with only the vertical fixing members 50 penetrating through the through holes 120 at the third position and connecting the screw holes on the hot bed bracket 20.

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

Referring to fig. 4-5 and fig. 9, fig. 9 is a schematic cross-sectional view of a 3D printing platform according to another embodiment of the present application. In this embodiment, the thermal bed 10 includes a body 11 having the bearing surface 100, and an extension 12 located on a side of the body 11 facing away from the bearing surface 100, and the horizontal fixing member 40 includes a second fixing member 42, where the second fixing member 42 is a fixing screw. The second fixing member 42 penetrates through the through hole 120 at the fourth position on the extension portion 12 and is connected with the screw hole on the hot bed support 20, the hole diameter of the through hole 120 is larger than the diameter of the second fixing member 42, and friction exists between the extension portion 12 and the hot bed support 20 and/or between the extension portion 12 and the second fixing member 42. Alternatively, the second fixing member 42 penetrates through the through hole 120 of the hot bed bracket 20 and is connected to the screw hole at the fourth position, the hole diameter of the through hole 120 is larger than the diameter of the second fixing member 42, and friction exists between the extension 12 and the hot bed bracket 20 and/or between the hot bed bracket 20 and the second fixing member 42. The axial direction of the second fixing member 42 is the second direction, and the relative movement of the second fixing member 42 within the range of the through hole 120 is limited by the friction force, so as to limit the relative movement of the fourth position and the thermal bed support 20 in the first direction or the third direction, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

Wherein not all second fixtures 42 share one fourth position, but each second fixture 42 has a respective fourth position.

The horizontal fixing member 40 may include a second fixing member 42, and the second fixing member 42 is also a fixing screw. The present embodiment allows the second securing member 42 to connect the fourth position of the extension 12 with the hot bed frame 20. Specifically, in one embodiment, the through hole 120 may be formed at the fourth position of the extension 12, and the screw hole may be formed at the hot bed bracket 20, so that the second fixing member 42 penetrates the through hole 120 at the fourth position and is connected to the screw hole of the hot bed bracket 20. In other embodiments, the through hole 120 may be formed in the hot bed support 20, and the screw hole may be formed in the fourth position of the extension portion 12, so that the second fixing member 42 penetrates the through hole 120 in the hot bed support 20 and is connected to the screw hole in the fourth position. In this embodiment, only the screw holes penetrating the through hole 120 at the fourth position and connecting the hot bed supporter 20 are schematically illustrated by the second fixing member 42.

The axial direction of the second fixing member 42 is also 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, and both are the second direction. In this embodiment, the diameter of the through hole 120 is larger than the diameter of the second fixing member 42, so that even if the first fixing member 41 and the second fixing member 42 are both present, the thermal bed 10 can still rotate around the first fixing member 41, and at this time, the second fixing member 42 rotates around the first fixing member 41 in the through hole 120 with a larger diameter, so that leveling can be achieved.

In addition, when the second securing member 42 fixedly connects the extension 12 and the thermal bed frame 20 together, there is a frictional force between the thermal bed frame 20 and/or between the extension 12 and the second securing member 42, or between the extension 12 and the thermal bed frame 20 and/or between the thermal bed frame 20 and the second securing member 42. The present embodiment can limit the relative movement of the second fixing member 42 within the range of the through hole 120 by the above friction force, so as to limit the relative movement of the fourth position of the extension portion 12 and the hot bed support 20 in the first direction or the third direction, thereby further improving the movement rigidity of the 3D printing platform 1 and the stability of the connection. And the leveling can be achieved only when the force on the hot bed 10 or the hot bed support 20 in the first direction generated during leveling is greater than the friction force. In other possible embodiments, it is also possible to first level the thermal bed 10 at the location of the second fixing member 42 and to use the second fixing member 42 for fixing the thermal bed 10 to the thermal bed frame 20 in the first direction, the second direction and the third direction after the leveling is completed. Alternatively, the second fixing member 42 may be screwed with a smaller locking force before leveling, and then the leveling process is performed, and the second fixing member 42 is locked completely after leveling is completed, so that the rigidity is improved by using the second fixing member 42, and leveling is achieved.

In this embodiment, the spatial relationship between the first position 101 and the fourth position is fixed, for example, it may be provided that, for any fourth position, the distance between any fourth position and its corresponding first position 101 is smaller than a preset distance, so when any leveling component 30 adjusts the distance between the first position 101 and the hot bed support 20 in the first direction, any leveling component 30 drives the corresponding second fixing piece 42 to overcome the friction force (if the second fixing piece 42 is locked, if no locking is required) and move along the first direction within the range of the through hole 120.

In this embodiment, the spatial relationship between the first position 101 and the fourth position of the thermal bed 10 may be fixed, so that when any leveling component 30 adjusts the distance between the first position 101 and the thermal bed support 20 in the first direction, that is, when the leveling component 30 adjusts the distance between the first position 101 and the thermal bed support 20 of the thermal bed 10 in the Z direction, any leveling component 30 may drive the corresponding second fixing piece 42 to move along the first direction within the range of the through hole 120 against the friction force, so that the distance between the first position 101 and the thermal bed support 20 may be adjusted on the premise of setting the second fixing piece 42, thereby adjusting the angle of the bearing surface 100 of the thermal bed 10, and achieving the purpose of leveling.

Referring to fig. 10, fig. 10 is a schematic cross-sectional view of a 3D printing platform according to 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 assemblies 30 include a first leveling assembly 301 and a second leveling assembly 302, where the first leveling assembly 301 drives the first fixing screw 421 to move within the range of the through hole 120 where the first fixing screw 421 is located against the friction force (if the first fixing screw 421 is locked, no overcoming is needed if the first fixing screw 421 is not locked), and the second leveling assembly 302 drives the second fixing screw 422 to move within the range of the through hole 120 where the second fixing screw 422 is located against the friction force (if the second fixing screw 422 is locked, no overcoming is needed if the second fixing screw 422 is not locked).

In this embodiment, the number of the second fixing members 42 and the leveling assemblies 30 is two, where the second fixing members 42 include a first fixing screw 421 and a second fixing screw 422, the leveling assemblies 30 include a first leveling assembly 301 and a second leveling assembly 302, the first leveling assembly 301 and the first fixing screw 421 are configured to form a group, and the second leveling assembly 302 and the second fixing screw 422 are configured to form a group. The first leveling component 301 can drive the first fixing screw 421 to move within the range of the through hole 120 where the first fixing screw 421 is located against friction force, and the second leveling component 302 can drive the second fixing screw 422 to move within the range of the through hole 120 where the second fixing screw 422 is located against friction force, so as to further adjust the distance between the first position 101 of the thermal bed 10 and the thermal bed support 20 in the Z direction, thereby adjusting the angle of the bearing surface 100 of the thermal bed 10, and achieving the purpose of leveling.

Optionally, the number of the leveling components 30 is three, and the number of the second fixing pieces 42 is also three, or two, or one, in summary, the number of the second fixing pieces 42 is smaller than or equal to the number of the leveling components 30, the number of the first fixing pieces 41 is one, taking the number of the second fixing pieces 42 as three as an example, each leveling component 30 and one second fixing piece 42 are one group, as shown in fig. 4-5, the first fixing piece 41, one group of leveling components 30 and one second fixing piece 42 are arranged on one side of the hot bed support 20, and the two groups of leveling components 30 and two second fixing pieces 42 are correspondingly arranged on the other side of the hot bed support 20. In other words, the hot bed 10 is provided with a first fixing member 41 and a second fixing member 42 on one side, but the leveling component 30 is not located at the position of the first fixing member 41, and the leveling component 30 is located at the position of the second fixing member 42. Two second fixing pieces 42 are arranged on the other side of the hot bed 10 corresponding to the first fixing piece 41 and the second fixing piece 42, and a leveling component 30 is arranged at the position of each second fixing piece 42.

In another possible embodiment, a first fixing member 41 and a second fixing member 42 may be disposed on one side of the thermal bed 10, and the leveling assemblies 30 are disposed at the positions of the second fixing members 42, but the leveling assemblies are not disposed at the positions of the first fixing members 41, and the thermal bed 10 is not disposed with the second fixing members 42 on the other side, and only two sets of leveling assemblies 30 are disposed.

It will also be appreciated that the hot bed bracket 20 includes opposite sides, one side including opposite first and second ends, the first securing member 41 being connected to the first end and the second securing member 42 being connected to the leveling assembly 30. The other side includes a third end and a fourth end which are oppositely arranged, the third end is provided with a second fixing piece 42 and a leveling component 30, and/or the fourth end is provided with the second fixing piece 42 and the leveling component 30.

Based on the above arrangement, the leveling assembly 30 on the same side as the first fixing assembly can be adjusted first, so that the thermal bed 10 rotates around the first fixing member 41 until the leveling standard corresponding to the leveling assembly 30 is reached. And then the leveling component 30 on the other side is adjusted, and the heights of the two opposite sides of the hot bed 10 in the horizontal direction are adjusted to be consistent until the leveling is completed.

Alternatively, when the horizontal fixing members 40 are provided on opposite sides of the hot bed frame 20, the axes of the two horizontal fixing members 40 which are provided opposite to each other coincide, thereby avoiding interference during movement.

Referring to fig. 11, fig. 11 is a schematic cross-sectional view of a 3D printing platform according to another embodiment of the present application. In this embodiment, the horizontal fixing member 40 includes a third fixing member 43, and the third fixing member 43 is a fixing screw. The third fixing member 43 penetrates through the through hole 120 at the fifth position on the extension portion 12 and is connected with the screw hole on the hot bed support 20, the hole diameter of the through hole 120 is larger than the diameter of the third fixing member 43, and friction exists between the extension portion 12 and the hot bed support 20 and/or between the extension portion 12 and the third fixing member 43. Alternatively, the third fixing member 43 penetrates through the through hole 120 of the hot bed bracket 20 and is connected to the screw hole at the fifth position, the hole diameter of the through hole 120 is larger than the diameter of the third fixing member 43, and friction exists between the extension portion 12 and the hot bed bracket 20 and/or between the hot bed bracket 20 and the third fixing member 43.

The axial direction of the third fixing member 43 is the third direction, and the relative movement of the third fixing member 43 within the range of the through hole 120 is limited by the friction force, so as to limit the relative movement of the fifth position and the hot bed bracket 20 in the first direction or the second direction.

Wherein not all third fixtures 43 share one fifth position, but each third fixture 43 has a respective fifth position.

The horizontal fixing member 40 may further include a third fixing member 43 in addition to the first fixing member 41 and the second fixing member 42, and these three may be combined arbitrarily or used independently, wherein the third fixing member 43 is also a fixing screw. The present embodiment allows the third securing member 43 to connect the fifth location of the extension 12 to the hot bed stand 20. Specifically, in one embodiment, the through hole 120 may be formed at the fifth position of the extension 12, and the screw hole may be formed at the hot bed bracket 20, so that the third fixing member 43 penetrates the through hole 120 at the fifth position and is connected to the screw hole of the hot bed bracket 20. In other embodiments, the through hole 120 may be formed in the hot bed support 20, and a screw hole may be formed in the fifth position of the extension portion 12, so that the third fixing member 43 penetrates the through hole 120 in the hot bed support 20 and is connected to the screw hole in the fifth position. In this embodiment, only the screw holes formed in the third fixing member 43 penetrating the through hole 120 at the fifth position and connecting the hot bed frame 20 are schematically illustrated.

And the axial direction of the third fixing member 43 is a 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 a Z direction, the second direction may be an X direction, and the third direction may be a Y direction, wherein the sliding direction of the thermal bed 10 with respect to the 3D printer 2 is the Y direction. The present embodiment can make the diameter of the through hole 120 larger than the diameter of the third fixing piece 43, so that even if the first fixing piece 41, the second fixing piece 42, and the third fixing piece 43 are simultaneously present, the thermal bed 10 can still rotate around the first fixing piece 41, and at this time, the third fixing piece 43 rotates around the first fixing piece 41 in the through hole 120 with a larger diameter, so that leveling can be achieved.

In addition, when the third fixing member 43 fixedly connects the extension portion 12 and the hot bed frame 20 together, there is a friction force between the hot bed frame 20 and/or between the extension portion 12 and the third fixing member 43, or a friction force between the extension portion 12 and the hot bed frame 20 and/or between the hot bed frame 20 and the third fixing member 43. The present embodiment can limit the relative movement of the third fixing member 43 within the range of the through hole 120 by the above friction force, so as to limit the relative movement of the fifth position of the extension portion 12 and the thermal bed support 20 in the first direction or the second direction, thereby further improving the motion stiffness of the 3D printing platform 1 and the stability of the connection. And the leveling can be achieved only when the force on the hot bed 10 or the hot bed support 20 in the first direction generated during leveling is greater than the friction force. In other possible embodiments, it is also possible to first level the thermal bed 10 at the position of the third fixing member 43 and to use the third fixing member 43 for fixing the thermal bed 10 to the thermal bed frame 20 in the first direction, the second direction and the third direction after the leveling is completed. Alternatively, the third fixing member 43 may be screwed with a smaller locking force before leveling, and then leveling is performed, and the third fixing member 43 is locked completely after leveling is completed, so that the second fixing member 42 may be used to increase rigidity and leveling may be achieved.

The third fixing member 43 and the second fixing member 42 are similar in function as seen separately, but the cooperation of the two has a certain improvement in rigidity of the printing table 1, because the thermal bed 10 and the thermal bed frame 20 can be rigidly fixed in the second direction as well as the third direction by the cooperation of the third fixing member 43 and the second fixing member 42, and are fixed only in the first direction by friction force.

In this embodiment, the through hole 120 is an elongated hole disposed along the first direction, and the width of the specific elongated hole may be consistent with the diameter of the second fixing member 42 or the diameter of the third fixing member 43, so that the rigidity of the printing platform 1 is improved to a certain extent, because of the design of the elongated hole, the thermal bed 10 and the thermal bed support 20 may be rigidly fixed in the second direction and the third direction, and only fixed in the first direction by friction force.

As shown in fig. 4 to 5, in the present embodiment, the number of the horizontal fixing members 40 includes two fixing members, one of which is located at 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 between one fixture and the other 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.

In the present embodiment, the number of the horizontal fixing members 40 may be two, that is, the number of the horizontal fixing members 40 includes two fixing members. There are various embodiments of the relative positions of the two fixing members, in one embodiment one on each side of the other fixing member in the second direction, in another embodiment one on each side of the other fixing member in the third direction, and in yet another embodiment the line between one fixing member and the other fixing member has a component in the second direction and a component in the third direction, the present embodiment is schematically illustrated with only one fixing member on each side of the other fixing member in the third direction.

As shown in fig. 4 to 5, in this embodiment, the number of the horizontal fixing members 40 includes at least three fixing members, and projections of the at least three fixing members on the bearing surface 100 form vertices of a polygon.

In this embodiment, the number of the horizontal fixing members 40 may be more than two, that is, 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 form the vertices of a polygon, so that the at least three fixing members can be used to cooperate with the hot bed 10 and the hot bed support 20, thereby better limiting the relative movement of the hot bed 10 and the hot bed support 20, and improving the supporting effect and the connection performance of the hot bed 10 and the hot bed support 20.

Referring to fig. 6 again, in the present embodiment, the leveling assembly 30 includes a leveling member 31 and a leveling elastic member 32, the leveling member 31 penetrates the thermal bed 10 from the bearing surface 100 and is connected to the thermal bed support 20, or the leveling member 31 penetrates the thermal bed support 20 and is connected to the thermal bed 10, and opposite ends of the leveling elastic member 32 respectively support the thermal bed support 20 and the thermal bed 10.

For leveling assemblies 30, each leveling assembly 30 may include a leveling member 31 and a leveling spring member 32, wherein the leveling member 31 connects the hotbed 10 to the hotmount bracket. Specifically, in one embodiment the leveling member 31 extends through the thermal bed 10 from the load surface 100 of the thermal bed 10 and is coupled to the thermal bed support 20, in other embodiments the leveling member 31 may extend through the thermal bed support 20 and is coupled to the thermal bed 10, and in this embodiment only the leveling member 31 extends through the load surface 100 of the thermal bed 10 and is coupled to the thermal bed support 20 for illustrative purposes. Opposite ends of the leveling elastic member 32 respectively abut against the thermal bed 10 and the thermal bed support 20, that is, one end of the leveling elastic member 32 abuts against a surface of the thermal bed 10 opposite to the bearing surface 100, and the other end of the leveling elastic member 32 abuts against a surface of the thermal bed support 20 adjacent to one side of the thermal bed 10. Optionally, 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.

In the present embodiment, by providing the leveling member 31 and the leveling elastic member 32 between the hot bed 10 and the hot bed bracket 20, the distance between the first position 101 of the hot bed 10 and the hot bed bracket 20 gradually decreases when the leveling member 31 is screwed clockwise. The leveling spring 32 is forced upwardly against the thermal bed 10 when the leveling member 31 is unscrewed counterclockwise, thereby increasing the distance of the first position 101 of the thermal bed 10 from the thermal bed support 20. In summary, the distance between the first position 101 of the thermal bed 10 and the thermal bed frame 20 can be controlled by the leveling members 31 and the leveling elastic members 32.

Referring to fig. 12, fig. 12 is a schematic diagram of a 3D printer according to an embodiment of the present application. The 3D printer 2 provided in this embodiment includes a three-dimensional print head 60, a base 61, a driving device (not shown, which may be a motor), and the 3D print platform 1 provided in the above embodiment of the present application, the three-dimensional print head 60 is disposed above the 3D print platform 1, and the three-dimensional print head 60 is used for extruding a material to print a model. The hot bed support 20 is slidably connected with the base 61, and the driving device is used for driving the hot bed support 20 and the base 61 to generate relative displacement in a horizontal direction. The driving device is also used for driving the three-dimensional printing head 60 to generate displacement in the vertical direction and the horizontal direction.

The driving device may include a motor, and accordingly, may include a timing belt, a screw, a guide rod, a timing pulley, a guide rail, or the like, which is not limited to the specific form of the driving device.

The three-dimensional printhead 60 includes an extrusion assembly that conveys the printing material to a hot end having a heating function, and the hot end heats the printing material to a molten state, and extrudes the printing material in the molten state on the printing platform 1.

Illustratively, the hot end includes a heat sink fin, a nozzle, and a throat between the heat sink fin and the nozzle. The printing material sequentially passes through the radiating fins, the throat pipe and the nozzle, specifically, the printing material is heated to a molten state at the nozzle, and the nozzle extrudes the printing material in the molten state on the printing platform 1. During the movement of the three-dimensional print head 60 and/or the printing table 1, the nozzles extrude the printing material in a molten state layer by layer at different positions of the printing table 1, thereby printing out a print.

The extrusion assembly comprises a driving wheel and a driven wheel which is arranged opposite to the driving wheel, and printing materials pass through the space between the driving wheel and the driven wheel. The driving wheel rotates in a first direction to drive the printing material to be conveyed to the hot end; the capstan rotates in a second direction opposite the first direction to drive the printed material back out of the extrusion assembly.

The 3D printer 2 provided in this embodiment, by adopting the 3D printing platform 1 provided in the foregoing embodiment of the present application, can improve the rigidity of the 3D printer 2, improve the accuracy of leveling, and improve the leveling efficiency.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or order of the features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Furthermore, the terms "comprising," "including," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. 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" means a alone, B alone, or both a and B.

The foregoing has outlined rather broadly the more detailed description of the embodiments herein in order that the principles and embodiments herein may be better understood, and in order that the present principles and embodiments may be better understood. However, the content of the present specification should not be construed as limiting the present application, and those skilled in the art can 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 are within the scope of the claims and their equivalents.

Claims

1. A 3D printing platform, comprising:

a thermal bed for heating and carrying a print panel or print;

2. The 3D printing platform of claim 1, wherein the thermal bed comprises a body having the bearing surface and an extension on a side of the body facing away from the bearing surface, the horizontal securing member comprises a first securing member for fixedly connecting a second location on the extension to the thermal bed support to limit relative movement of the second location to the thermal bed support, and the projections of the at least two sets of leveling assemblies and the second location on the bearing surface form vertices of a polygon.

3. The 3D printing platform of claim 2, wherein the number of first fixtures is one; the at least two groups of leveling assemblies are composed of two groups of leveling assemblies, and the projections of the two groups of leveling assemblies and the second position on the bearing surface form the vertexes 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 bearing surface form vertexes of a quadrilateral.

4. A 3D printing platform according to any of claims 1 to 3, wherein the 3D printing platform further comprises: the vertical fixing piece is used for fixedly connecting the third position of the hot bed with the hot bed support so as to limit the relative movement of the third position and the hot bed support, and the projections of the at least two groups of leveling components and the third position on the bearing surface form the vertexes of a polygon.

5. The 3D printing platform of any of claims 1 to 4, wherein the at least two sets of leveling components are at least three sets of leveling components, projections of the at least three sets of leveling components on the bearing surface constituting vertices of a polygon.

6. The 3D printing platform of any of claims 1 to 5, wherein the thermal bed comprises a body having the bearing surface and an extension on a side of the body facing away from the bearing surface, the horizontal securing member comprising a second securing member that is a securing screw;

the second fixing piece penetrates through a through hole at a fourth position on the extension part and is connected with a screw hole on the hot bed support, the aperture of the through hole is larger than the diameter of the second fixing piece, and friction force exists between the extension part and the hot bed support and/or between the extension part and the second fixing piece; or the second fixing piece penetrates through the through hole on the hot bed support and is connected with the screw hole at the fourth position, the aperture of the through hole is larger than the diameter of the second fixing piece, and friction force exists between the extension part and the hot bed support and/or between the hot bed support and the second fixing piece;

The axial direction of the second fixing piece is the second direction, and the relative movement of the second fixing piece in the range of the through hole is limited through the friction force, so that the relative movement of the fourth position and the hot bed support in the first direction or the third direction is limited, wherein the third direction is perpendicular to the first direction and the second direction respectively.

7. The 3D printing platform of claim 6, wherein the horizontal fixture further comprises a third fixture, the third fixture being a set screw;

the third fixing piece penetrates through a through hole at a fifth position on the extension part and is connected with a screw hole on the hot bed support, the aperture of the through hole is larger than the diameter of the third fixing piece, and friction force exists between the extension part and the hot bed support and/or between the extension part and the third fixing piece; or the third fixing piece penetrates through the through hole on the hot bed support and is connected with the screw hole at the fifth position, the aperture of the through hole is larger than the diameter of the third fixing piece, and friction force exists between the extension part and the hot bed support and/or between the hot bed support and the third fixing piece;

The axial direction of the third fixing piece is the third direction, and the relative movement of the third fixing piece in the range of the through hole is limited by the friction force, so that the fifth position and the relative movement of the hot bed support in the first direction or the second direction are limited.

8. The 3D printing platform of any of claims 6 to 7, wherein the through holes are elongated holes arranged along the first direction.

9. The 3D printing platform of any of claims 1 to 8, wherein the number of horizontal fixtures includes two fixtures, one of the fixtures being located on one side of the other fixture 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 between one fixture and the other 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 of any of claims 1 to 9, wherein the number of horizontal fixtures comprises at least three fixtures, the projections of the at least three fixtures on the bearing surface constituting vertices of a polygon.

11. The 3D printing platform of any of claims 1 to 10, wherein the any one of the leveling assemblies comprises a leveling member and a leveling spring member, the leveling member extending from the bearing surface through the thermal bed and connecting the thermal bed support or the leveling member extending through the thermal bed support and connecting the thermal bed, opposite ends of the leveling spring member respectively abutting the thermal bed support and the thermal bed.

12. The 3D printing platform of any of claims 1 to 11, wherein the thermal bed support is connected to a pulley, and the pulley has a sliding direction that 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, comprising: a three-dimensional printhead, a base, a driving device, and a 3D printing platform according to any one of claims 1-12, the three-dimensional printhead being disposed above the 3D printing platform, the three-dimensional printhead being for extruding material to print a model; the hot bed support is in sliding connection with the base, and the driving device is used for driving the hot bed support to generate relative displacement with the base.