CN219153738U - Printing platform and three-dimensional forming equipment - Google Patents

Abstract

The utility model discloses a printing platform and three-dimensional forming equipment, wherein a forming surface is parallel to a release film through the movement of a leveling ball assembly relative to a clamping assembly, the leveling ball assembly is fixed through the clamping assembly, the inclination angle of the printing platform is fixed, the operation of a leveling process is simple, and the leveling result is accurate. The main technical scheme is as follows: the printing platform comprises a fixed component and a lifting component, wherein the fixed component is used for being connected with the lifting component; the clamping assembly is connected with the fixing assembly, the first end of the leveling ball assembly is connected with the clamping assembly, and the fastening piece is connected with the clamping assembly; the printing platform body is connected with the second end of the leveling ball assembly; the fastener is used for adjusting the clamping assembly so as to enable the leveling ball assembly to move or be fixed relative to the clamping assembly; the first end of the elastic component is connected with the fixing component, the second end of the elastic component is abutted with the leveling ball component, and the elastic component is used for providing elastic force for the leveling ball component to move to one side of the trough. The utility model is mainly used for leveling the printing platform.

Description

Printing platform and three-dimensional forming equipment

Technical Field

The utility model relates to the technical field of 3D printing, in particular to a printing platform and three-dimensional forming equipment.

Background

The light curing three-dimensional forming equipment utilizes the characteristic that the printing resin is subjected to polymerization reaction under illumination, and irradiates a light source according to the cross section shape of an object to be formed, so that the resin in a fluid state is cured and formed. In the printing process, the printing platform is immersed into printing resin and keeps a uniform gap with the release film, light rays penetrate through the release film and are projected on the printing resin, so that the resin between the printing platform and the release film is solidified, a first layer of a model is formed and is adhered to the printing platform, the printing platform lifts the solidified printing model upwards, the solidified printing model is stripped from the release film, then solidification of the next layer is continued, and three-dimensional printing is realized by stacking layers.

The forming of the first layer of the model is very important, the forming surface of the printing platform is required to be parallel to the release film, the distance is accurate, in the existing printing platform leveling method, adjusting parts such as studs and the like are arranged at a plurality of positions of the printing platform, for example, in the patent with publication number CN209079225U, a first leveling part is connected with a connecting plate of a lifting mechanism, a second leveling part is connected with a printing platform component, four first adjusting holes are uniformly formed in a first connecting part on the first leveling part, four second adjusting holes corresponding to the first adjusting holes are formed in a second connecting part of the second leveling part, the second adjusting holes are connected with the first adjusting holes through studs and can move in the vertical direction relative to the first adjusting holes, and the first adjusting holes and/or the second adjusting holes are long-shaped in the vertical direction. Leveling is carried out in a stud fixing mode, each stud needs to be fastened in sequence in the leveling process, the number of the studs is large, the printing platform is easy to shift in the process of screwing the studs, the forming surface of the printing platform cannot be guaranteed to be attached to the release film all the time, repeated adjustment is needed, and the process is complicated.

Disclosure of Invention

In view of the above, the embodiment of the utility model provides a printing platform and a three-dimensional forming device, wherein the leveling ball assembly is movable relative to the clamping assembly to level, so that after the forming surface of the printing platform body is parallel to the release film, the clamping assembly is used for fixing the leveling ball assembly, the inclination angle of the printing platform is fixed, the operation of the leveling process is simple, and the leveling result is accurate.

In order to achieve the above purpose, the present utility model mainly provides the following technical solutions:

in one aspect, an embodiment of the present utility model provides a printing platform applied to a stereoscopic forming apparatus, where the printing platform is configured to move relative to a trough under the action of a lifting component of the stereoscopic forming apparatus to perform 3D printing, and the printing platform includes:

the fixed component is used for being connected with the lifting component;

the leveling assembly comprises a clamping assembly, a leveling ball assembly and a fastening piece, the clamping assembly is connected with the fixing assembly, the first end of the leveling ball assembly is connected with the clamping assembly, and the fastening piece is connected with the clamping assembly;

the printing platform body is connected with the second end of the leveling ball assembly;

the fastener is used for adjusting the clamping assembly so that the clamping assembly can fix or loosen the leveling ball assembly;

the leveling assembly comprises an elastic component, a first end of the elastic component is connected with the fixing assembly, a second end of the elastic component is abutted against the leveling ball assembly, and the elastic component is used for providing elastic force for the leveling ball assembly to move to one side of the trough.

The clamping assembly comprises a first clamping piece and a second clamping piece;

the first clamping piece is connected with the fixing assembly, the first clamping piece and the second clamping piece are arranged in a split mode, the second clamping piece is connected with the first clamping piece through a fastener, and the leveling ball assembly is located between the first clamping piece and the second clamping piece;

the fastener includes at least two adjustment positions corresponding to different separation distances between the second clamping member and the first clamping member.

The first clamping piece is provided with a screw hole, the second clamping piece is provided with a fastening through hole, the fastening piece is a bolt, and the fastening piece is connected to the fastening through hole in a penetrating manner and is in threaded connection with the screw hole;

or the first clamping piece is provided with a fastening through hole, the second clamping piece is provided with a screw hole, the fastening piece is a bolt, and the fastening piece is connected to the fastening through hole in a penetrating way and is in threaded connection with the screw hole;

alternatively, the number of fasteners is two, the fasteners comprise adjusting heads, the two adjusting heads are respectively positioned on one side of the second clamping piece opposite to the first clamping piece, and the adjusting heads are used for being stressed to enable the fasteners to move between at least two adjusting positions.

The first clamping piece and the second clamping piece both comprise arc-shaped inner walls, the arc-shaped inner walls of the first clamping piece and the arc-shaped inner walls of the second clamping piece jointly define a columnar accommodating space, and the first end of the leveling ball assembly is positioned in the accommodating space; the leveling ball assembly is in line contact with the arcuate inner wall.

Wherein, the clamping assembly also comprises a connecting bolt;

the first clamping piece is provided with a connecting through hole, the fixing component is provided with a connecting hole, and the connecting bolt penetrates through the connecting through hole and is in threaded connection with the connecting hole so that the first clamping piece is connected with the fixing component.

The leveling ball assembly comprises a leveling ball, and the leveling ball is connected with the clamping assembly; the leveling assembly further comprises a pressing ring, the pressing ring comprises a central hole, the pressing ring is connected with the leveling ball, the hole wall of the central hole is matched with the outer surface of the leveling ball, and the elastic component is connected with the pressing ring;

the leveling ball assembly comprises a leveling ball, and the leveling ball is connected with the clamping assembly; the leveling assembly further comprises a pressing ring, the pressing ring comprises a top surface, a bottom surface, a hole wall and a side wall, the top surface and the bottom surface are annular surfaces, the inner diameter of the top surface is smaller than that of the bottom surface, the top surface and the bottom surface are oppositely arranged, the hole wall is respectively connected with the inner edge of the top surface and the inner edge of the bottom surface, the hole wall surrounds the inner edge of the top surface to form a central hole, the hole wall comprises a spherical surface matched with the outer surface of the leveling ball, the side wall is respectively connected with the outer edge of the top surface and the outer edge of the bottom surface, the side wall surrounds the outer edge of the top surface for a circle, and the side wall is a cylindrical surface;

the hole wall is connected with the leveling ball, and the elastic component is connected with the top surface;

the inner diameter of the bottom surface is smaller than the diameter of the leveling ball;

the diameter of the leveling ball is more than or equal to 5 mm and less than or equal to 100 mm.

The leveling assembly further comprises a limiting piece, the clamping assembly comprises a containing space, the containing space is provided with an opening, and the first end of the leveling ball assembly extends into the containing space from the opening;

the limiting piece is connected with the clamping assembly, a part of the limiting piece is positioned in the accommodating space, and a part of the limiting piece positioned in the accommodating space is close to the opening so as to keep the first end of the leveling ball assembly positioned in the accommodating space;

and/or the clamping assembly comprises a first clamping piece and a second clamping piece; the first clamping piece is provided with three first locating pieces, the second clamping piece is provided with three second locating pieces corresponding to the three first locating pieces one by one, and the three first locating pieces interact with the three second locating pieces to limit the moving direction of the second clamping piece relative to the first clamping piece.

The leveling ball assembly comprises a leveling ball, a fixing screw and a supporting cylinder;

the leveling ball is movably connected with the clamping assembly, the leveling ball is provided with a mounting through hole, the supporting cylinder is positioned on one side of the leveling ball opposite to the fixing assembly, and the fixing screw sequentially penetrates through the mounting through hole and the supporting cylinder and is connected with the printing platform body.

On the other hand, the embodiment of the utility model also provides a three-dimensional forming device, which comprises the printing platform, a base, a trough and a lifting assembly, wherein the printing platform is any one of the above;

lifting assembly and silo all set up on the base, print platform with lifting assembly connects.

According to the printing platform and the three-dimensional forming equipment, the leveling ball assembly is moved relative to the clamping assembly to level, so that after the forming surface of the printing platform body is parallel to the release film, the clamping assembly is used for fixing the leveling ball assembly, the inclination angle of the printing platform is fixed, the leveling process is simple to operate, and the leveling result is accurate. In the prior art, adjusting parts such as studs are arranged at a plurality of positions of the printing platform, leveling is carried out in a stud fixing mode, each stud needs to be fastened in sequence in the leveling process, the number of the studs is large, the printing platform is easy to shift in the screwing process, the forming surface of the printing platform cannot be guaranteed to be attached to a release film all the time, repeated adjustment is needed, and the process is complex. Compared with the prior art, in this application file, before printing begins, lifting unit drives the print platform body and removes towards the silo, under the action of supporting from the type membrane, leveling ball subassembly rotates relative clamping assembly, when lifting unit descends to preset the position, the shaping face of print platform body is laminated from the type membrane, adjust clamping assembly fastening leveling ball subassembly, make the shaping face of print platform body and from the type membrane between have even space, guarantee the effective printing of model first layer, guarantee the precision of model, fastening process need not to adjust repeatedly, and fastener quantity is few, leveling efficiency is high, easy operation.

Drawings

Fig. 1 is a schematic structural diagram of a stereoscopic forming apparatus according to an embodiment of the present utility model at a first view angle;

FIG. 2 is a schematic sectional view of a three-dimensional molding apparatus shown in FIG. 1 in the B-B direction;

FIG. 3 is a schematic view of a partial enlarged structure of the stereolithography apparatus shown in FIG. 2 in the area A;

fig. 4 is an exploded schematic view of a composition structure of a printing platform at a first view angle according to an embodiment of the present utility model;

fig. 5 is an exploded schematic view of a composition structure of a printing platform at a second view angle according to an embodiment of the present utility model;

FIG. 6 is a schematic cross-sectional view of one embodiment of a leveling assembly;

FIG. 7 is a schematic structural diagram of a pressure ring at a first view angle according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a pressure ring at a second view angle according to an embodiment of the present utility model.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description will refer to the specific implementation, structure, characteristics and effects of the printing platform according to the utility model by combining the accompanying drawings and the preferred embodiment.

In one aspect, as shown in fig. 1 to 8, an embodiment of the present utility model provides a printing platform applied to a stereoscopic molding apparatus, where the printing platform is configured to move relative to a trough under the action of a lifting component of the stereoscopic molding apparatus to perform 3D printing, and the printing platform includes:

the fixed component 100, the fixed component 100 is used for connecting with the lifting component;

the leveling assembly 200, the leveling assembly 200 comprises a clamping assembly, a leveling ball assembly 220 and a fastening piece 230, the clamping assembly is connected with the fixing assembly 100, a first end of the leveling ball assembly 220 is connected with the clamping assembly, and the fastening piece 230 is connected with the clamping assembly;

the printing platform body 300, the printing platform body 300 is connected with the second end of the leveling ball assembly 220;

the fastener 230 is used to adjust the clamp assembly to secure or release the leveling ball assembly 220;

the leveling assembly 200 further includes an elastic member 260, a first end of the elastic member 260 is connected with the fixing assembly 100, a second end of the elastic member 260 abuts against the leveling ball assembly 220, and the elastic member 260 is used for providing elastic force for moving the leveling ball assembly 220 to the trough side.

For convenience of illustration, the following description of specific structure of the printing platform and leveling process is made by taking the stereoscopic forming device for projecting light as an example. In the stereoscopic forming equipment of lower light projector, the trough is arranged on the light-transmitting plate of the stereoscopic forming equipment base 600, the release film of the trough is attached to the light-transmitting plate, and the projection light is projected onto the trough from bottom to top. The first bottom surface of the printing platform body 300 is a forming surface, and in the printing process, the first layer of the model is adhered to the forming surface and is solidified layer by layer along with the rising of the printing platform body 300. In the leveling process, the fastener 230 is adjusted so that the clamping assembly releases the leveling ball assembly 220, that is, the leveling ball assembly 220 can move relative to the clamping assembly, the lifting assembly drives the printing platform body 300 to move downwards, one point or one side of the forming surface is firstly contacted with the release film, along with the continuous descending of the printing platform body 300, the printing platform body 300 rotates under the pushing action of the release film until the printing platform body 300 moves downwards to a preset position, the forming surface is completely attached to the release film, and at the moment, the forming surface is parallel to the release film. The fastener 230 is adjusted so that the clamping assembly secures the leveling ball assembly 220 and the tilt angle or height of the printing platform body 300 will not change and the leveling process ends.

The movement of the leveling ball assembly 220 relative to the clamping assembly includes rotation and movement of the leveling ball assembly 220 in a vertical direction, wherein the rotation of the leveling ball assembly 220 relative to the clamping assembly changes the inclination angle of the forming surface of the printing platform body 300, such that the forming surface is parallel to the release film. The leveling ball assembly 220 can move in the vertical direction relative to the clamping assembly to adjust the height of the printing platform body 300, and in the printing process, when the printing platform body 300 descends to an initial position, the gap between the forming surface and the release film is a preset value, so that the first layer of the printing model is thin and thick uniformly and has a preset thickness, and the printing model can be accurately adhered to the forming surface.

As shown in fig. 1 to 8, in the leveling process, the elastic component 260 applies an elastic force to move to one side of the release film to the printing platform body 300 through the leveling ball component 220, that is, the elastic component 260 and the release film respectively apply a thrust to the printing platform body 300 in opposite directions, so that the printing platform body 300 cannot easily move up and down, but rotates under the thrust action of the release film, the forming surface is guaranteed to be attached to the release film, and the forming surface is guaranteed to be parallel to the release film. In one embodiment, the elastic component 260 is a spring, the bottom end of the fixing component 100 is provided with an embedded groove 122, and the top end of the spring is embedded in the embedded groove 122, so that the relative position of the top end of the spring and the fixing component 100 is fixed, the spring is convenient to install and position, and slipping and shifting of the spring are avoided.

The three-dimensional forming equipment provided by the embodiment of the utility model mainly performs leveling through the movement of the leveling ball assembly relative to the clamping assembly, and fixes the leveling ball assembly through the clamping assembly, so that the inclination angle of the printing platform is fixed, the leveling process is simple to operate, and the leveling result is accurate. In the prior art, adjusting parts such as studs are arranged at a plurality of positions of the printing platform, leveling is performed in a stud fixing mode, each stud needs to be fastened in sequence in the leveling process, the process is complex, displacement of the printing platform is easily caused in the screwing process, the forming surface of the printing platform cannot be guaranteed to be attached to a release film all the time, and repeated adjustment is needed. Compared with the prior art, in this application file, before printing begins, lifting unit drives the print platform body and removes towards the silo, under the action of supporting from the type membrane, leveling ball subassembly rotates relative clamping assembly, when lifting unit descends to preset the position, the shaping face of print platform body is laminated from the type membrane, adjust clamping assembly fastening leveling ball subassembly, make the shaping face of print platform body and from having even space between the type membrane, guarantee the effective printing of model first layer, guarantee the precision of model, the fastening process need not to adjust repeatedly, leveling efficiency is high, easy operation.

In one embodiment, the clamping assembly includes a first clamping member 211 and a second clamping member 212. The first clamping member 211 is connected with the fixing assembly 100, the first clamping member 211 and the second clamping member 212 are separately arranged, and the second clamping member 212 is connected with the first clamping member 211 through a fastening member 230, and the leveling ball assembly 220 is located between the first clamping member 211 and the second clamping member 212. The fastener 230 includes at least two adjustment positions that correspond to different separation distances between the first clamp member 211 and the second clamp member 212 to secure or release the leveling ball assembly 220.

The first clamping member 211 is connected with the fixing assembly 100, the relative position of the first clamping member 211 and the fixing assembly 100 is fixed, the second clamping member 212 is connected with the first clamping member 211 through the fastening member 230, and the second clamping member 212 is not connected with the fixing assembly 100, so that the second clamping member 212 can move relative to the first clamping member 211. If during leveling, the second clamping member 212 is adjusted to be far away from the first clamping member 211 by the fastening member 230, the leveling ball assembly 220 is released by the first clamping member 211 and the second clamping member 212, and can move relative to the first clamping member 211 and the second clamping member 212, after leveling, the second clamping member 212 is adjusted to be close to the first clamping member 211 by the fastening member 230, and the leveling ball assembly 220 is clamped by the first clamping member 211 and the second clamping member 212, so that the position of the leveling ball assembly 220 is fixed with the position of the clamping assembly, i.e. the relative position of the printing platform body 300 and the fixing assembly 100 is fixed.

In one embodiment, as shown in fig. 1-8, the number of fasteners 230 is two, the fasteners 230 include adjustment heads 231, the two adjustment heads 231 are each located on a side of the second clamping member 212 opposite the first clamping member 211, and the adjustment heads 231 are configured to be forced to move the fasteners between at least two adjustment positions. The adjusting head 231 is used for applying external force by a user, and the adjusting head 231 can protrude from the surface of the second clamping member 212, so as to facilitate operations such as rotation. As in the embodiments below, the fastener 230 is a bolt and the adjustment head 231 is a nut of the bolt, the screw of the bolt is turned by screwing the nut to perform the screw pushing action. The two adjusting heads 231 are both positioned on the second clamping piece 212, and only one side of the clamping assembly is required to be operated in the leveling process, so that the operation is convenient. In embodiments where the fastener 230 is a bolt, the at least two adjustment positions refer to different degrees of tightening of the bolt.

The structures of the first clamping member 211 and the second clamping member 212 may be various, for example, the first clamping member 211 and the second clamping member 212 are both plate-shaped structures, or, in an embodiment, the first clamping member 211 and the second clamping member 212 each include an arc-shaped inner wall, the arc-shaped inner wall of the first clamping member 211 and the arc-shaped inner wall of the second clamping member 212 together define a cylindrical accommodating space, and the first end of the leveling ball assembly 220 is located in the accommodating space.

The shape of the arc inner wall is matched with the periphery of the leveling ball 221 of the leveling ball assembly 220, and the contact area between the first clamping piece 211 and the second clamping piece 212 and the leveling ball 221 is increased, so that the first clamping piece 211 and the second clamping piece 212 are in line contact with the leveling ball 221, but not in point contact with the leveling ball 221, and the clamping effect is better. In one embodiment, the first clamping member 211 further includes a first top surface, a first bottom surface, a first left inner wall, a first right inner wall, a first left outer wall, a first right outer wall and a first rear outer wall, where the first top surface and the first bottom surface are horizontally disposed and are respectively located at the top end and the bottom end of the second clamping member 212, the first top surface is abutted to the fixing component 100, the first left inner wall, the first right inner wall, the first left outer wall, the first right outer wall and the first rear outer wall are vertically disposed and are respectively connected to the first top surface and the first bottom surface, the first left inner wall and the first right inner wall are respectively connected to two sides of the arc-shaped inner wall, the first left outer wall and the first right outer wall are respectively and vertically connected to the first left inner wall and the first right inner wall, and the first rear outer wall and the first left outer wall and the first right outer wall are vertically connected to form an outer elevation of the second clamping member 212.

The second clamping member 212 further comprises a second top surface, a second bottom surface, a second left inner wall, a second right inner wall, a second left outer wall, a second right outer wall and a second rear outer wall, wherein the second top surface and the second bottom surface are horizontally arranged and are respectively located at the top end and the bottom end of the second clamping member 212, the top surface and the fixing assembly 100 can be abutted, or the second top surface and the fixing assembly 100 are spaced by a certain gap, the second left inner wall, the second right inner wall, the second left outer wall, the second right outer wall and the second rear outer wall are vertically arranged and are respectively connected to the second top surface and the second bottom surface, the second left inner wall and the second right inner wall are respectively connected with two sides of the arc-shaped inner wall, the second left outer wall and the second right outer wall are respectively and vertically connected with the second left inner wall and the second right inner wall, and the second rear outer wall is vertically connected with the second left outer wall and the second right outer wall, and the second left outer wall, and the second right outer wall and the second rear outer wall form an outer vertical surface of the second clamping member 212.

The first left inner wall of the first clamp 211 is opposite to the second left inner wall of the second clamp 212, and the first right inner wall of the first clamp 211 is opposite to the second right inner wall of the second clamp 212. When the fastener 230 adjusts the second clamping member 212 to move relative to the first clamping member 211, the first left inner wall and the second left inner wall are moved closer to or farther away from each other, and the first right inner wall and the second right inner wall are moved closer to or farther away from each other, when the first clamping member 211 and the second clamping member 212 clamp the leveling ball assembly 220, the first left inner wall and the second left inner wall may abut or be spaced apart by a gap, the first right inner wall and the second right inner wall may abut or be spaced apart by a gap that provides a margin for mechanical error, such as when the leveling ball 221 is worn for a long time, the gap allows the first clamping member 211 and the second clamping member 212 to be further moved closer to each other to clamp the leveling ball 221.

In one embodiment, as shown in FIGS. 1-8, a clamping assembly includes a first clamping member and a second clamping member; three first positioning members 2111 are provided on the first clamping member 211, three second positioning members 2121 are provided on the second clamping member 212 in one-to-one correspondence with the three first positioning members 2111, and the three first positioning members 2111 interact with the three second positioning members 2121 to define the direction in which the first clamping member 211 and the second clamping member 212 move relative to each other.

In order to facilitate the installation and positioning of the first clamping member 211 and the second clamping member 212, as shown in fig. 1-8, the first positioning member 2111 may be a positioning hole, the second positioning member 2121 may be a positioning post 2121, the positioning post is opposite to the positioning hole, and the positioning post is used for being inserted into the positioning hole in an axially movable manner so as to fix the relative movement direction of the first clamping member 211 and the second clamping member 212, so that the second clamping member 212 is only close to or far from the first clamping member 211 in the horizontal direction, and the second clamping member 212 is prevented from shaking. In one embodiment, two positioning posts are disposed on the second left inner wall of the first clamping member 211, and one positioning post is disposed on the second right inner wall.

In one embodiment, the first clamping member 211 is provided with a screw hole 214, the second clamping member 212 is provided with a fastening through hole, the fastening member 230 is a bolt, and the fastening member 230 is connected to the fastening through hole in a penetrating manner and is in threaded connection with the screw hole 214. Alternatively, the first clamping member 211 is provided with a fastening through hole, the second clamping member 212 is provided with a screw hole 214, the fastening member 230 is a bolt, and the fastening member 230 is connected to the fastening through hole in a penetrating manner and is in threaded connection with the screw hole 214. The fastener 230 is configured to rotate to threadably move the second clamp member 212 toward and away from the first clamp member 211, and the adjustment head 231 is a nut of a bolt.

In the following, taking the first clamping member 211 provided with the screw hole 214 and the second clamping member 212 provided with the fastening through hole as an example, the fastening member 230 is a bolt, and includes a threaded portion and a nut portion, the fastening member 230 is in threaded connection with the screw hole 214, when the fastening member 230 rotates, the nut portion is close to or far from the first clamping member 211, and the nut portion acts on the second clamping member 212, so that the second clamping member 212 is close to or far from the first clamping member 211.

In one embodiment, the number of fasteners 230 is two, with two fasteners 230 on each side of the leveling ball assembly 220.

The fastener 230 includes a first fastening bolt and a second fastening bolt, the fastening through hole includes a first bolt through hole and a second bolt through hole, two side openings of the first bolt through hole are respectively located on a first left inner wall and a first rear outer wall of the second clamping member 212, and two side openings of the second bolt through hole are respectively located on a first right inner wall and a first rear outer wall of the second clamping member 212. In contrast, the screw hole 214 includes a first screw hole having an opening on the second left inner wall of the first clamping member 211 and a second screw hole having an opening on the second right inner wall of the first clamping member 211, the first screw hole corresponding to the first bolt through hole, and the second screw hole corresponding to the second bolt through hole. Since the leveling ball assembly 220 corresponds to the arc-shaped inner wall, the first fastening bolt and the second fastening bolt are positioned at both sides of the leveling ball assembly 220 after passing through the first bolt through hole and the second bolt through hole, respectively.

In one embodiment, the clamping assembly further comprises a connecting bolt. The first clamping member 211 is provided with a connection through hole 216, the fixing assembly 100 is provided with a connection hole 110, and a connection bolt passes through the connection through hole 216 and is in threaded connection with the connection hole 110, so that the first clamping member 211 is connected with the fixing assembly 100.

The first clamping member 211 and the fixing assembly 100 may be fixedly connected, such as by welding, or the first clamping member 211 and the fixing assembly 100 may be detachably connected, in the above embodiment, the connecting through hole 216 penetrates through the top end and the bottom end of the first clamping member 211, that is, the connecting through hole 216 has openings on the first bottom surface and the first top surface of the first clamping member 211, and the connecting bolt is inserted into the connecting through hole 216 from the bottom end of the first clamping member 211 and then connected with the connecting hole 110, so that the first clamping member 211 is fixed with the fixing assembly 100. The connecting through hole 216 and the connecting bolt may be two, respectively.

In one embodiment, as shown in fig. 1-8, the leveling ball assembly 220 includes a leveling ball 221, the leveling ball 221 being coupled to the clamp assembly; the leveling assembly 200 further comprises a pressing ring 240, the pressing ring 240 comprises a central hole, the pressing ring 240 is connected with the leveling ball 221, the hole wall 241 of the central hole is matched with the outer surface of the leveling ball 221, and the elastic component 260 is connected with the pressing ring 240.

As shown in fig. 1-8, the compression ring 240 is approximately annular and may be made of rubber or metal materials. Taking the direction of the actual use of the pressing ring 240 as an example, the diameter of the central hole of the pressing ring 240 is gradually increased in the vertical downward direction, so that the central hole of the pressing ring 240 is in a structure with a small upper part and a big lower part, the hole wall 241 of the central hole is in an inward concave arc shape and is matched with the outer surface of the leveling ball 221, when the pressing ring 240 is connected with the leveling ball 221, the hole wall 241 of the central hole of the pressing ring 240 is matched with the outer surface of the leveling ball 221, for example, the outer surface of the leveling ball 221 is a spherical surface, the hole wall 241 of the central hole of the pressing ring 240 is also a spherical surface, the hole wall 241 of the central hole of the pressing ring 240 is connected with the outer surface of the leveling ball 221, the contact surface is increased, the leveling ball 221 is not easy to slip, and the leveling ball 221 is more stable.

In a more specific embodiment, as shown in fig. 1-8, the pressure ring 240 further includes a top surface 243, a bottom surface 244, a hole wall 241, and a side wall 242, where the top surface 243 and the bottom surface 244 are annular surfaces, the inner diameter of the top surface 243 is smaller than the inner diameter of the bottom surface 244, the top surface 243 and the bottom surface 244 are opposite, the hole wall 241 is respectively connected with the inner edge of the top surface 243 and the inner edge of the bottom surface 244, the hole wall 241 is formed by combining a central hole around the inner edge of the top surface 243, the hole wall 241 includes a spherical surface adapted to the outer surface of the leveling ball 221, the side wall 242 is respectively connected with the outer edge of the top surface 243 and the outer edge of the bottom surface 244, the side wall 242 surrounds the outer edge of the top surface 243 for a week, and the side wall 242 is a cylindrical surface.

The top surface 243 is a flat surface for abutting the elastic member 260. The elastic member 260 may be a spring, and the compression ring 240 is configured to prevent abrasion of the leveling ball 221 caused by friction between the spring and the leveling ball 221. The side wall 242 corresponds to the arc surfaces of the first clamping member 211 and the second clamping member 212, and a gap is formed between the side wall 242 and the arc surfaces, so that the arrangement of the compression ring 240 does not affect the relative movement between the leveling ball 221 and the clamping assembly. The hole wall 241 includes a spherical surface and a cylindrical surface adapted to the outer surface of the leveling ball 221, the spherical surface is connected to the bottom surface 244 and the cylindrical surface, the cylindrical surface is connected to the top surface 243, and the cylindrical surface smoothes the edge of the center hole, so as to avoid the collision of the edge of the center hole with the fixing screw 222 of the leveling ball assembly 220.

In one embodiment, the maximum diameter of the central aperture of the pressure ring 240 is less than the diameter of the leveling ball 221. The diameter of the leveling ball 221 is 5 mm or more and 100 mm or less.

The diameter of the leveling ball 221 may be greater than or equal to 12 mm and less than or equal to 20 mm, for example, the diameter of the leveling ball 221 is 15 mm, the maximum diameter of the center hole of the pressing ring 240 is the inner diameter of the bottom surface 244, for example, the maximum diameter of the center hole of the pressing ring 240 is 11 mm, so that the pressing ring 240 abuts against the leveling ball 221 from the position of the leveling ball 221 near the top end, the leveling ball 221 is convenient to apply downward acting force, the position stability of the leveling ball 221 is ensured, the volume of the pressing ring 240 can be reduced, and the weight of the leveling assembly 200 is reduced.

In one embodiment, the leveling assembly 200 further includes a limiting member, the clamping member includes a receiving space, the receiving space has an opening, the first end of the leveling ball assembly 220 extends into the receiving space from the opening, the limiting member is connected with the clamping member, a portion of the limiting member is located in the receiving space, and a portion of the limiting member located in the receiving space is closer to the opening than the first end of the leveling ball assembly 220, so as to keep the first end of the leveling ball assembly 220 located in the receiving space.

The limiting member may be disposed on the first clamping member 211 and/or the second clamping member 212, for example, the limiting member is disposed on the second clamping member 212, and the limiting member protrudes out of the arc-shaped inner wall of the second clamping member 212 and is located below the leveling ball 221. In one embodiment, as shown in fig. 1 to 8, two limiting holes 250 are formed in the second clamping member 212, one limiting hole 250 is formed in the first clamping member 211, the limiting member includes three jackscrews, and after the first end of the leveling ball assembly 220 is inserted between the first clamping member 211 and the second clamping member 212, the three jackscrews are respectively inserted into the three limiting holes, and the ends of the jackscrews protrude out of the arc-shaped inner wall to perform the limiting function.

In one embodiment, the leveling ball assembly 220 includes a leveling ball 221, a set screw 222, and a support barrel 223. The leveling ball 221 is movably connected with the clamping assembly, the leveling ball 221 is provided with a mounting through hole, the supporting cylinder 223 is positioned on one side of the leveling ball 221 opposite to the fixing assembly 100, and the fixing screw 222 is connected with the printing platform body 300 after sequentially penetrating through the mounting through hole and the supporting cylinder 223.

The leveling ball 221 is in a sphere shape, the leveling ball 221 comprises a through-connection through hole penetrating through the top end and the bottom end, the supporting cylinder 223 is positioned at the bottom end of the leveling ball 221, and the top end face of the supporting cylinder 223 is matched with the shape of the outer surface of the leveling ball 221, so that the supporting cylinder 223 is better jointed with the leveling ball 221. After passing through the leveling ball 221 and the supporting cylinder 223, the fixing screw 222 is fixed at the center of the top end of the printing platform body 300.

On the other hand, the embodiment of the utility model also provides a stereoscopic forming device, which comprises the printing platform as any one of the above, a base 600, a trough and a lifting assembly;

the lifting assembly and the trough are arranged on the base 600, and the printing platform is connected with the lifting assembly;

the lifting assembly includes a guide frame 400 and a cantilever 500;

the trough is arranged on the base 600, the guide frame 400 is connected with the base 600, and the first end of the cantilever 500 is movably connected with the guide frame 400;

the fixing assembly 100 comprises a handle 110 and a sleeve 120, a penetrating socket 121 is arranged on the sleeve 120, a cantilever 500 is inserted into the penetrating socket 121 from a second end, and the handle 110 is respectively connected with the sleeve 120 and the cantilever 500;

the cantilever 500 is used for moving along the guide frame 400 to drive the printing platform body 300 to move relative to the trough, and when the molding surface contacts with the trough, the leveling assembly 200 is used for attaching the molding surface to the release film of the trough.

One end of the cantilever 500 is connected with the guide frame 400, the cantilever 500 moves along the guide frame 400 in the vertical direction, the cantilever 500 horizontally extends, the other end of the cantilever is suspended, the penetrating opening 121 is a through opening penetrating through the sleeve 120, the sleeve 120 is of an approximate cylindrical structure, the sleeve 120 is sleeved at the end of the cantilever, the shape of the inner wall of the penetrating opening 121 is matched with the outer contour of the cantilever 500, and the sleeve 120 and the cantilever are stable in position and cannot shake relatively. The handle 110 is a plum blossom handle, and the top of external member 120 is provided with fixed opening 123, and after the plum blossom handle inserted fixed opening 123, screw in the screw on cantilever 500, realize the fixed of external member 120. The first clamping member 211 is connected with the sleeve 120 to connect the leveling assembly 200 and the fixing assembly 100.

In one aspect, as shown in fig. 1-8, an embodiment of the present utility model provides a printing platform, applied to a stereoscopic molding apparatus, where the printing platform is configured to move relative to a trough under the action of a lifting component of the stereoscopic molding apparatus to perform 3D printing, and the printing platform includes:

the fixed component 100, the fixed component 100 is used for connecting with the lifting component;

the leveling assembly 200, the leveling assembly 200 comprises a clamping assembly, a leveling ball assembly 220 and a fastening piece 230, the clamping assembly is connected with the fixing assembly 100, a first end of the leveling ball assembly 220 is connected with the clamping assembly, and the fastening piece 230 is connected with the clamping assembly;

the printing platform body 300, the printing platform body 300 is connected with the second end of the leveling ball assembly 220;

the fastener 230 is used to adjust the clamp assembly to secure or release the leveling ball assembly 220;

the leveling assembly 200 further includes an elastic member 260, a first end of the elastic member 260 is connected with the fixing assembly 100, a second end of the elastic member 260 abuts against the leveling ball assembly 220, and the elastic member 260 is used for providing an elastic force for the leveling ball assembly 220 to move to the trough side.

1-8, the clamping assembly includes a first clamping member 211 and a second clamping member 212;

the first clamping piece 211 is connected with the fixing assembly 100, the first clamping piece 211 and the second clamping piece 212 are arranged in a split mode, the second clamping piece 212 is connected with the first clamping piece 211 through a fastening piece 230, and the leveling ball assembly 220 is located between the first clamping piece 211 and the second clamping piece 212;

the fastener 230 includes at least two adjustment positions corresponding to different separation distances between the first clamp 211 and the second clamp 212.

1-8, a screw hole 214 is formed in the first clamping piece 211, a fastening through hole is formed in the second clamping piece 212, a fastening piece 230 is a bolt, and the fastening piece 230 is connected to the fastening through hole in a penetrating manner and is in threaded connection with the screw hole 214;

or, the first clamping piece 211 is provided with a fastening through hole, the second clamping piece 212 is provided with a screw hole 214, the fastening piece 230 is a bolt, and the fastening piece 230 is connected with the fastening through hole in a penetrating way and is in threaded connection with the screw hole 214;

alternatively, the number of the fasteners 230 is two, the fasteners 230 include adjustment heads 231, and the two adjustment heads 231 are located on a side of the second clamping member 212 opposite to the first clamping member 211, and the adjustment heads 231 are used for forcing the fasteners 230 to move between at least two adjustment positions.

1-8, the first clamping member 211 and the second clamping member 212 each include an arc inner wall, and the arc inner wall of the first clamping member 211 and the arc inner wall of the second clamping member 212 together define a cylindrical accommodating space, in which the first end of the leveling ball assembly 220 is located; the leveling ball component is in line contact with the arc-shaped inner wall;

wherein, as shown in fig. 1-8, the clamping assembly further comprises a connecting bolt;

the first clamping member 211 is provided with a connection through hole 216, the fixing assembly 100 is provided with a connection hole 110, and a connection bolt passes through the connection through hole 216 and is in threaded connection with the connection hole 110, so that the first clamping member 211 is connected with the fixing assembly 100.

1-8, the leveling ball assembly 220 includes a leveling ball 221, the leveling ball 221 being coupled to the clamp assembly; the leveling assembly 200 further comprises a pressing ring 240, the pressing ring 240 comprises a central hole, the pressing ring 240 is connected with the leveling ball 221, the hole wall of the central hole is matched with the outer surface of the leveling ball 221, and the elastic part 260 is connected with the pressing ring 240;

1-8, the leveling ball assembly 220 includes a leveling ball 221, the leveling ball 221 being coupled to the clamp assembly; the leveling assembly 200 further comprises a pressure ring 240, the pressure ring 240 comprises a top surface 243, a bottom surface 244, a hole wall 241 and a side wall 242, the top surface 243 and the bottom surface 244 are annular surfaces, the inner diameter of the top surface 243 is smaller than that of the bottom surface 244, the top surface 243 and the bottom surface 244 are oppositely arranged, the hole wall 241 is respectively connected with the inner edge of the top surface 243 and the inner edge of the bottom surface 244, the hole wall 241 surrounds the inner edge of the top surface 243 to form a central hole, the hole wall 241 comprises a spherical surface matched with the outer surface of the leveling ball 221, the side wall 242 is respectively connected with the outer edge of the top surface 243 and the outer edge of the bottom surface 244, the side wall 242 surrounds the outer edge of the top surface 243 for a circle, and the side wall 242 is a cylindrical surface;

the hole wall 241 is connected with the leveling ball 221, and the elastic component 260 is connected with the top surface 243;

the inner diameter of the bottom surface 244 is smaller than the diameter of the leveling ball 221;

the diameter of the leveling ball 221 is 5 mm or more and 100 mm or less.

The leveling assembly 200 further comprises a limiting piece, the clamping assembly comprises a containing space, the containing space is provided with an opening, the first end of the leveling ball assembly 220 extends into the containing space from the opening, the limiting piece is connected with the clamping assembly, a part of the limiting piece is located in the containing space, and a part of the limiting piece located in the containing space is closer to the opening than the first end of the leveling ball assembly 220, so that the first end of the leveling ball assembly 220 is located in the containing space;

and/or, as shown in fig. 1-8, the clamping assembly includes a first clamping member and a second clamping member; the first clamping member 211 is provided with three first positioning members 2111, the second clamping member 212 is provided with three second positioning members 2121 corresponding to the three first positioning members 2111 one by one, and the three first positioning members 2111 interact with the three second positioning members 2121 to limit the moving direction of the second clamping member 212 relative to the first clamping member 211.

Wherein the leveling ball assembly 220 includes a leveling ball 221, a set screw 222, and a support cylinder 223;

the leveling ball 221 is movably connected with the clamping assembly, the leveling ball 221 is provided with a mounting through hole, the supporting cylinder 223 is positioned on one side of the leveling ball 221 opposite to the fixing assembly 100, and the fixing screw 222 is connected with the printing platform body 300 after sequentially penetrating through the mounting through hole and the supporting cylinder 223.

On the other hand, as shown in fig. 1-8, the embodiment of the present utility model further provides a stereoscopic forming apparatus, including a printing platform as described above, and a base 600, a trough and a lifting assembly;

the lifting assembly includes a guide frame 400 and a cantilever 500;

the trough is arranged on the base 600, the guide frame 400 is connected with the base 600, and the first end of the cantilever 500 is movably connected with the guide frame 400;

the fixing assembly 100 comprises a handle 110 and a sleeve 120, a penetrating socket 121 is arranged on the sleeve 120, a cantilever 500 is inserted into the penetrating socket 121 from a second end, and the handle 110 is respectively connected with the sleeve 120 and the cantilever 500;

the cantilever 500 is used for moving along the guide frame 400 to drive the printing platform body 300 to move relative to the trough, and when the molding surface contacts with the trough, the leveling assembly 200 is used for attaching the molding surface to the release film of the trough.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a print platform is applied to three-dimensional former, print platform is used for moving in order to carry out 3D printing with the silo relatively under the effect of three-dimensional former's lifting unit, its characterized in that, print platform includes:

the fixed component is used for being connected with the lifting component;

the leveling assembly comprises a clamping assembly, a leveling ball assembly and a fastener, the clamping assembly is connected with the fixing assembly, the first end of the leveling ball assembly is connected with the clamping assembly, and the fastener is connected with the clamping assembly;

the printing platform body is connected with the second end of the leveling ball assembly;

the fastener is used for adjusting the clamping assembly so that the clamping assembly can fix or loosen the leveling ball assembly;

the leveling assembly comprises an elastic component, a first end of the elastic component is connected with the fixing assembly, a second end of the elastic component is abutted to the leveling ball assembly, and the elastic component is used for providing elastic force for the leveling ball assembly to move to one side of the trough.

2. The printing platform of claim 1, wherein the printing platform comprises a plurality of printing stations,

the clamping assembly comprises a first clamping piece and a second clamping piece;

the first clamping piece is connected with the fixing assembly, the first clamping piece and the second clamping piece are arranged in a split mode, the second clamping piece is connected with the first clamping piece through the fastening piece, and the leveling ball assembly is located between the first clamping piece and the second clamping piece;

the fastener includes at least two adjustment positions corresponding to different separation distances between the second clamp and the first clamp.

3. The printing platform of claim 2, wherein the printing platform comprises a plurality of printing stations,

the first clamping piece is provided with a screw hole, the second clamping piece is provided with a fastening through hole, the fastening piece is a bolt, and the fastening piece is connected to the fastening through hole in a penetrating manner and is in threaded connection with the screw hole;

or, the first clamping piece is provided with a fastening through hole, the second clamping piece is provided with a screw hole, the fastening piece is a bolt, and the fastening piece is connected to the fastening through hole in a penetrating way and is in threaded connection with the screw hole;

alternatively, the number of the fasteners is two, the fasteners comprise adjusting heads, the two adjusting heads are located on one side of the second clamping piece opposite to the first clamping piece, and the adjusting heads are used for being stressed to enable the fasteners to move between at least two adjusting positions.

4. The printing platform of claim 2, wherein the printing platform comprises a plurality of printing stations,

the first clamping piece and the second clamping piece both comprise arc-shaped inner walls, the arc-shaped inner walls of the first clamping piece and the arc-shaped inner walls of the second clamping piece jointly define a columnar accommodating space, and the first end of the leveling ball assembly is positioned in the accommodating space; the leveling ball assembly is in line contact with the arcuate inner wall.

5. The printing platform of claim 2, wherein the printing platform comprises a plurality of printing stations,

the clamping assembly further comprises a connecting bolt;

the first clamping piece is provided with a connecting through hole, the fixing component is provided with a connecting hole, and the connecting bolt penetrates through the connecting through hole and is in threaded connection with the connecting hole, so that the first clamping piece is connected with the fixing component.

6. The printing platform of claim 1, wherein the printing platform comprises a plurality of printing stations,

the leveling ball assembly comprises a leveling ball, and the leveling ball is connected with the clamping assembly; the leveling assembly further comprises a pressing ring, the pressing ring comprises a central hole, the pressing ring is connected with the leveling ball, the hole wall of the central hole is matched with the outer surface of the leveling ball, and the elastic component is connected with the pressing ring.

7. The printing platform of claim 1, wherein the printing platform comprises a plurality of printing stations,

the leveling ball assembly comprises a leveling ball, and the leveling ball is connected with the clamping assembly; the leveling assembly further comprises a pressing ring, the pressing ring comprises a top surface, a bottom surface, a hole wall and a side wall, the top surface and the bottom surface are annular surfaces, the inner diameter of the top surface is smaller than that of the bottom surface, the top surface and the bottom surface are oppositely arranged, the hole wall is respectively connected with the inner edge of the top surface and the inner edge of the bottom surface, the hole wall surrounds the inner edge of the top surface to form a central hole, the hole wall comprises a spherical surface matched with the outer surface of the leveling ball, the side wall is respectively connected with the outer edge of the top surface and the outer edge of the bottom surface, the side wall surrounds the outer edge of the top surface to form a circle, and the side wall is a cylindrical surface;

the hole wall is connected with the leveling ball, and the elastic component is connected with the top surface;

the inner diameter of the bottom surface is smaller than the diameter of the leveling ball;

the diameter of the leveling ball is more than or equal to 5 mm and less than or equal to 100 mm.

8. The printing platform of claim 1, wherein the printing platform comprises a plurality of printing stations,

the leveling assembly further comprises a limiting piece, the clamping assembly comprises a containing space, the containing space is provided with an opening, and the first end of the leveling ball assembly extends into the containing space from the opening;

the limiting piece is connected with the clamping assembly, a part of the limiting piece is positioned in the accommodating space, and a part of the limiting piece positioned in the accommodating space is close to the opening so as to keep the first end of the leveling ball assembly positioned in the accommodating space;

and/or the clamping assembly comprises a first clamping piece and a second clamping piece;

the first clamping piece is provided with three first locating pieces, the second clamping piece is provided with three second locating pieces corresponding to the three first locating pieces one by one, and the three first locating pieces interact with the three second locating pieces to limit the moving direction of the second clamping piece relative to the first clamping piece.

9. The printing platform of claim 1, wherein the printing platform comprises a plurality of printing stations,

the leveling ball assembly comprises a leveling ball, a fixing screw and a supporting cylinder;

the leveling ball is movably connected with the clamping assembly, the leveling ball is provided with a mounting through hole, the supporting cylinder is located on one side, opposite to the fixing assembly, of the leveling ball, and the fixing screw sequentially penetrates through the mounting through hole and the supporting cylinder and then is connected with the printing platform body.

10. A stereolithography apparatus comprising a printing platform as claimed in any one of claims 1 to 9, and a base, a chute and a lifting assembly;

the lifting assembly and the trough are arranged on the base, and the printing platform is connected with the lifting assembly.

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