WO2023005397A1

WO2023005397A1 - 3d printing device

Info

Publication number: WO2023005397A1
Application number: PCT/CN2022/095549
Authority: WO
Inventors: 毛宇航; 胡桂源
Original assignee: 深圳市纵维立方科技有限公司
Priority date: 2021-07-28
Filing date: 2022-05-27
Publication date: 2023-02-02
Also published as: CN216300188U

Abstract

A 3D printing device, comprising a support arm, a levelling assembly, and a printing platform; the levelling assembly comprises a first limiting member and a first connecting member, the first limiting member being slidably connected to the support arm, one end of the first connecting member being a rotating connecting part, the rotating connecting part being connected to the support arm, and the other end of the first connecting member being connected to the printing platform; the first limiting member can move between a first position and a second position; in the first position, the first limiting member cooperates with the support arm to fix the rotating connecting part; and in the second position, the rotating connecting part is rotatably connected to the support arm. The embodiments of the present invention can increase the levelling precision of the printing platform of the 3D printing device.

Description

A three-dimensional printing device

technical field

The invention relates to the technical field of three-dimensional printing, in particular to a three-dimensional printing device.

Background technique

3D printing equipment, also known as 3D printing equipment (3 Dimension Printer, 3DP), is a cumulative manufacturing technology, that is, a machine of rapid prototyping technology. It is based on a digital model file, using special wax materials, powdered metal Or adhesive materials such as plastics, by sequentially printing multiple layers of adhesive materials to create three-dimensional objects.

In the process of printing with a light-curing 3D printer, it is necessary to align and bond the printing platform and the Liquid Crystal Display (LCD) screen below it to print out standard objects, so the printing platform needs to be adjusted. flat. The current leveling method for the printing platform is usually to set threaded holes in multiple places on the printing platform, and adjust the height of each part of the printing platform through the threaded holes and adjusting nuts. However, it is necessary to rotate the adjusting nuts at multiple places during the operation. , It is difficult to ensure that the rotation angle of each adjustment nut is consistent, so the leveling error is relatively large, and it is easy to damage the screen during operation. It can be seen that the accuracy of the leveling method of the printing platform of the existing 3D printing equipment is low.

Contents of the invention

An embodiment of the present invention provides a three-dimensional printing device to improve the accuracy of the leveling method of the printing platform of the three-dimensional printing device.

An embodiment of the present invention provides a three-dimensional printing device, including a support arm, a leveling assembly, and a printing platform, wherein,

The leveling assembly includes a first limiting member and a first connecting member, the first limiting member is slidably connected to the support arm, one end of the first connecting member is a rotating connecting part, and the rotating connecting part connected to the support arm, and the other end of the first connecting member is connected to the printing platform;

The first limiting member can move between a first position and a second position. In the first position, the first limiting member cooperates with the support arm to fix the rotating connection portion. In the second position, the rotational connection part is rotationally connected with the support arm.

Optionally, the leveling assembly further includes a displacement transmission member and a second limiting member, the second limiting member is fixedly connected to the support arm, and the rotating connection part is located between the first limiting member and the second limiting member. Between the second limiting parts, the displacement transmission part is connected with the first limiting part to drive the first limiting part to move between the first position and the second position;

In the first position, both the first limiting member and the second limiting member abut against the rotating connection portion; in the second position, the rotating connecting portion can Rotate between the limiting member and the second limiting member.

Optionally, the first limiting member is a screw, and at the first position, one end of the first limiting member passes through the first connecting member and is threadedly connected with the support arm. In the second position, the first limiting member is out of fixation with the support arm.

Optionally, the support arm is provided with a sliding slot, and the first limiting member is located in the sliding slot and can slide in the sliding slot.

Optionally, the displacement transmitting member includes a jacking wire and a jacking block, the support arm is provided with a first threaded hole, the first threaded hole communicates with the sliding groove, and the jacking block is located in the sliding groove , and abut against the first limiting member, the jacking wire passes through the first threaded hole, and is fixedly connected with the jacking block.

Optionally, the side of the top block facing the first limiter is a first guiding slope, the side of the first limiting member facing the top block is a second guiding slope, and the first guiding slope and The second guiding slope is at least partially attached, and the first guiding slope is in sliding contact with the second guiding slope.

Optionally, the first limiting member is recessed inward toward the side of the rotating connection portion to form a first curved accommodation cavity, and the second limiting member is inward toward the side of the first curved accommodation cavity The depression forms a second curved surface accommodation cavity; the rotating connection part is arranged in a spherical shape, and the rotation connecting part is located between the first curved surface accommodation cavity and the second curved surface accommodation cavity;

In the first position, the two sides of the rotating connection part abut against the inner wall of the first curved storage cavity and the inner wall of the second curved storage cavity respectively; in the second position, the The rotating connection part can rotate in the space enclosed by the first curved accommodation chamber and the second curved accommodation chamber.

Optionally, the first connecting piece further includes a cylindrical connecting portion, the cylindrical connecting portion is fixedly connected to the rotating connecting portion, the second limiting member is provided with a first through hole, and the first The through hole communicates with the second curved surface accommodation cavity, and the columnar connecting portion passes through the first through hole and is connected with the printing platform;

The inner diameter of the first through hole is larger than the outer diameter of the cylindrical connecting portion.

Optionally, there is an annular step in the first through hole, and an elastic member is provided between the annular step and the rotating connection portion.

Optionally, the three-dimensional printing device further includes a second connecting piece, the second connecting piece is detachably connected to the leveling assembly and the printing platform;

The second connecting piece includes a connecting block, and an accommodating groove is opened on the connecting block. in the holding tank.

Optionally, a positioning hole is opened on the outer wall of the cylindrical connecting part;

The connecting block is provided with a second threaded hole corresponding to the position of the positioning hole, and the first screw passes through the second threaded hole and the positioning hole in sequence, and is threadedly connected with the second threaded hole.

Optionally, the second connecting piece further includes a connecting bracket, and the connecting bracket includes a first connecting arm, a second connecting arm and a fixing plate, one end of the first connecting arm is connected to the fixing plate, and the other end Connected to the printing platform, one end of the second connecting arm is connected to the fixing plate, and the other end is connected to the printing platform; the connecting block is sandwiched between the first connecting arm and the second connecting arm between the arms, and the connecting block is detachably connected to the fixing plate.

In the embodiment of the present invention, the three-dimensional printing device is provided with a leveling assembly. Since the leveling assembly includes a first connecting piece and a first limiting piece, the first limiting piece can move between the first position and the second position. When the first limiter is at the first position, the first limiter cooperates with the support arm to fix the rotating connection part, the printing platform and the support arm are fixed by the leveling assembly, and when the first limiter is at the second position, the rotating connection part It is rotatably connected with the support arm, and the printing platform is rotatably connected with the support arm through a leveling assembly. In this way, the first stopper moves between the first position and the second position to realize or release the fixation of the rotating connection part, that is, the fixed and rotating connection between the printing platform and the support arm can be realized, and the printing platform can be rotated The leveling method is realized, which improves the leveling accuracy of the printing platform.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is one of partial structural diagrams of a three-dimensional printing device provided by an embodiment of the present invention;

Fig. 2 is an exploded view of a partial structure of a three-dimensional printing device provided by an embodiment of the present invention;

Fig. 3 is one of the cross-sectional schematic diagrams of the three-dimensional printing device provided by the embodiment of the present invention;

Figure 4 is a partial enlarged view of Figure 3;

Fig. 5 is the second schematic cross-sectional view of the three-dimensional printing device provided by the embodiment of the present invention;

Figure 6 is a partial enlarged view of Figure 5;

Fig. 7 is the second schematic diagram of the partial structure of the three-dimensional printing device provided by the embodiment of the present invention;

Fig. 8 is the second schematic diagram of the partial structure of the three-dimensional printing device provided by the embodiment of the present invention.

Detailed ways

Embodiments of the present invention will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The features of the terms "first" and "second" in the description and claims of the present invention may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device or element Must be in a particular orientation, be constructed in a particular orientation, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those skilled in the art can understand the specific meanings of the terms in the present invention in specific situations.

1 to 8, an embodiment of the present invention provides a three-dimensional printing device, including a support arm 10, a leveling assembly 20 and a printing platform 30, wherein,

The leveling assembly 20 includes a first connecting piece 22 and a first stopper 23, the first stopper 23 is slidably connected with the support arm 10, one end of the first link 22 is a rotating connection part 221, and the rotating connection part and the support arm connected, and the other end of the first connector is connected to the printing platform;

The first limiting member 23 can move between the first position and the second position. In the first position, the first limiting member 23 cooperates with the support arm 10 to fix the rotating connection part 221. In the second position, the rotating connecting part 221 and The support arm 10 is rotatably connected.

In the embodiment of the present invention, refer to FIG. 1. FIG. 1 is a partial structural schematic diagram of a three-dimensional printing device provided by the embodiment of the present invention, wherein the support arm 10 can slide on the vertically arranged guide rail 40 through a linear slider, thereby driving the printing platform 30 close to or away from the exposure screen 50 . During the working process of the three-dimensional printing equipment, the printing platform 30 is first attached to the bottom of the material box provided on the exposure screen 50, and then the printing platform 30 is gradually moved away from the exposure screen 50 through the traction of the stepping motor, and the material box Due to photocuring, the material is gradually shaped through the cooperation of the printing platform 30 and the exposure screen 50 . Therefore, before the 3D printing device starts working, it is necessary to adjust the printing platform 30 to a position flatly attached to the bottom end of the material box provided on the exposure screen 50 and fix it to avoid deviation during the printing process.

In order to achieve leveling, in the embodiment of the present invention, the leveling assembly 20 can be arranged between the support arm 10 and the printing platform 30, and the two ends are respectively connected with the support arm 10 and the printing platform 30, and the printing platform 30 can pass through the leveling assembly. 20 is connected to the support arm 10.

The leveling assembly 20 includes a first connecting member 22 and a first limiting member 23. It should be understood that in order to allow the printing platform 30 to rotate relative to the support arm 10 through the leveling assembly 20, the rotating connecting portion 221 of the first connecting member 22 The rotation can occur relative to the support arm 10 , for example, a rotation cavity can be provided on one side of the support arm 10 , so that the rotation connection part 211 can rotate in the rotation cavity. Since the end of the first connecting member 22 opposite to the rotating connecting portion 221 is fixedly connected to the printing platform 30, when the rotating connecting portion 221 rotates, the end of the first connecting member 22 opposite to the rotating connecting portion 221 drives the printing platform 30 to face The support arm 10 rotates, so that the relative position between the printing platform 30 and the support arm 10 can be adjusted, and the printing platform 30 can be leveled.

Specifically, in some embodiments, the rotating connection portion 221 of the first connecting member 22 may be arranged in a spherical shape, and the rotating connecting portion 221 may rotate in the space between the first limiting member 23 and the second limiting member 24 . In some embodiments, the rotating connection part 221 can also be provided with a rotating shaft, and the rotating shaft of the rotating connecting part 221 cooperates with the shaft hole provided by the first limiting part 23 and/or the second limiting part 24 to realize the printing platform 30 and the supporting arm. The relative rotation of 10 is not enumerated one by one here again.

Further, in order to realize the fixation of the printing platform 30 after leveling, the first stopper 23 is slidably connected with the support arm 10, and can move between the first position and the second position. In the first position, the first stopper There may be a gap between 23 and the rotation connection part 211, so that the rotation connection part can rotate in the space between the printing platform 30 and the support arm 10; contact, and can push the rotating connection part 211 to be relatively fixed with the support arm, such as abutting against a stopper provided at one end of the support arm, so that the rotation and displacement of the rotation connection part 211 can be limited, and the printing platform 30 and the support arm can be fixed. 10 fixed.

Specifically, when the first limiting member 23 is at the first position, refer to FIG. 3 to FIG. 4 , which are structural schematic diagrams when the first limiting member is at the first position. 23 abuts against the rotating connecting portion 221, and pushes the rotating connecting portion 221 to abut against the stopper provided at one end of the support arm to limit the rotation of the rotating connecting portion 221, so that the printing platform 30 is fixed to the supporting arm 10 through the leveling assembly 20 .

When the first limiting member 23 is at the second position, refer to FIGS. The rotating connection part 221 rotates, and the rotation of the rotating connecting part 221 drives the printing platform 30 to rotate relative to the support arm 10 , so that the angle between the printing platform 30 and the support arm 10 can be adjusted to realize the leveling of the printing platform 30 .

The connection mode between the first limiting member 23 and the support arm 10 can be set according to actual needs. For example, in some embodiments, a sliding slot 11 can be provided in the support arm 10 , and the first limiting member 23 can move between the first position and the second position of the sliding slot 11 . In some embodiments, a sliding bracket may be provided outside the support arm 10, and the first limiting member 23 may move between the first position and the second position of the sliding bracket.

It can be understood that the first position and the second position can be determined according to the specific structure. For example, the first position can be the two ends of the sliding groove 11 provided in the support arm 10, or the two ends of the sliding bracket provided outside the support arm 10. end, etc., without further limitation here.

In the embodiment of the present invention, the three-dimensional printing device is provided with a leveling assembly 20, since the leveling assembly 20 includes a first connecting member 22 and a first limiting member 23, the first limiting member 23 can be in the first position and the second position When the first stopper 23 is at the first position, the first stopper 23 and the support arm 10 cooperate to fix the rotating connection part 221, the printing platform 30 and the support arm 10 are fixed by the leveling assembly 20, when the first When the limiting member 23 is at the second position, the rotating connection part 221 is rotatably connected to the support arm 10 , and the printing platform 30 is rotatably connected to the support arm 10 through the leveling assembly 20 . In this way, by moving the first limiting member 23 between the first position and the second position, to realize or release the fixing of the rotating connection part 221, that is, the fixed and rotating connection between the printing platform 30 and the support arm 10 can be realized, and the printing The platform 30 can be leveled by rotating, which improves the convenience of leveling the printing platform 30 .

Optionally, the leveling assembly 20 further includes a displacement transmitting member 21 and a second limiting member 24, the second limiting member 24 is fixedly connected to the support arm 10, and the rotating connection portion 221 is located between the first limiting member 23 and the second limiting member. Between the positioning members 24, the displacement transmission member 21 is connected with the first limiting member 23 to drive the first limiting member 23 to move between the first position and the second position;

In the first position, both the first limiting member 23 and the second limiting member 24 abut against the rotating connection portion 221; 24 rotations.

In the embodiment of the present invention, referring to Fig. 3 to Fig. 6, the leveling assembly 20 may further include a displacement transmitting member 21 and a second limiting member 24, wherein the displacement transmitting member 21 is used to transmit its own displacement to the first limiting member. The positioning member 23, thereby driving the first limiting member 23 to be displaced. Specifically, the above-mentioned displacement transmission member 21 can be slidably connected with the support arm 10, and the displacement transmission member 21 can be displaced by a push-pull force. The member 21 is used to displace the displacement transmission member 21.

The above-mentioned connection manners between the displacement transmitting member 21 and the first limiting member 23 include but are not limited to fixed connection and sliding connection. In a specific embodiment, the displacement transmitting member 21 can be fixedly connected with the first limiting member 23, so that the displacement of the displacement transmitting member 21 can drive the overall displacement of the first limiting member 23; of course, in other optional embodiments Among them, the displacement transmission member 21 can also be in abutment or sliding connection with the first limiting member 23 , and the first limiting member can be driven to move by the interaction force between the displacement transmitting member 21 and the first limiting member 23 .

Specifically, referring to FIGS. 3 to 6 , in one embodiment, the above-mentioned displacement transmitting member 21 can move between the third position and the fourth position. When the displacement transmitting member 21 is in the third position, the first limiting member 23 Displaced to the first position, when the displacement transmission member 21 is located at the fourth position, the first limiting member 23 is displaced to the second position.

It should be understood that, for the convenience of the user, the above-mentioned displacement transmission member 21 can be partly arranged outside the above-mentioned support arm 10, and can be connected with the handle, so that the user can rotate or push and pull the handle to make the displacement transmission member 21 Displacement occurs.

The second limiting member 24 is used to cooperate with the first limiting member 23 to fix the rotating connection portion 221 . Since the second limiting member 24 is fixedly connected to the support arm 10, and the rotating connection portion 221 is displaced between the first limiting member 23 and the second limiting member 24, when the first limiting member 23 is at the first position, The first limiting member 23 can push the rotating connecting portion 221 to abut against the second limiting member 24, thereby fixing the rotating connecting portion 221. When the first limiting member 23 is in the second position, the first limiting member 23 The space between the member 23 and the second limiting member 24 can be used for the rotating connection part 221 to rotate relative to the support arm 10 and the printing platform.

In the embodiment of the present invention, the displacement of the first limiting member 23 can be driven by setting the displacement transmission member 21, which can play a buffering role and avoid damage to the 3D printing equipment caused by the user’s large force during operation. The cooperation between the part 23 and the second limiting part 24 can clamp and fix the above-mentioned rotating connection part 221, which improves the stability during fixing.

Optionally, the first limiting member 23 is a screw rod. In the first position, one end of the first limiting member 23 passes through the first connecting member 22 and is threadedly connected with the support arm 10. In the second position, the first limiting member 23 One end of the position member 23 is detached from the support arm 10 .

In the embodiment of the present invention, referring to FIG. 7, the above-mentioned first limiting member 23 can be a screw rod, and the above-mentioned first connecting member 22 can be arranged in a hollow cylindrical shape, that is, the first connecting member 22 can have a through hole for The first limiting member 23 passes through. When the first limiting member 23 is in the first position, the first limiting member 23 can pass through the through hole of the first connecting member 22, and be screwed with the screw hole on the support arm 10, so that the rotating connecting part can be connected by a screw rod. 221 is fixed with the support arm 10. When the first limiting member 23 is located at the second position, the first limiting member 23 can disengage from the screw hole on the support arm 10 , so that the rotating connection portion 221 is rotatably connected to the supporting arm 10 .

It can be understood that, during the use of the above-mentioned first limiting member 23, the user can rotate the first limiting member 23 so that the first limiting member 23 can be displaced between the first position and the second position, To realize the fixing and unfixing of the rotating connection part. In this way, since the first limiting member 23 is a screw, the displacement distance of the first limiting member 23 can be better controlled by turning the screw through the hole, thereby avoiding equipment damage caused by excessive displacement distance of the first limiting member 23 .

Optionally, the support arm 10 is provided with a sliding slot 11 , and the first limiting member 23 is located in the sliding slot 11 and can slide in the sliding slot 11 .

In the embodiment of the present invention, the sliding groove 11 can be opened on the outer surface of the support arm 10, that is, the sliding groove can extend in any direction along the outer surface of the support arm 10, of course, the sliding groove 11 can also be opened in the support arm 10, For example, a sliding slot 11 is defined inwardly from one side of the support arm 10 . Referring to FIG. 1 , in a specific embodiment, in order to reduce space occupation, the sliding groove 11 can be opened in the support arm 10 , that is, a passage is formed inside the support arm 10 , and the first stopper 23 is located in the sliding groove 11 , so that it can move between the first position and the second position of the sliding groove 11.

Optionally, the displacement transmission member 21 includes a top screw 211 and a top block 212, and the support arm 10 is provided with a first threaded hole 12, the opening at one end of the first threaded hole 12 is set on one side of the support arm 10, and the opening at the other end is set on the inner wall of the sliding groove 11, so that the first threaded hole 12 can communicate with the sliding groove 11, the top block 212 is located in the sliding groove 11, and abuts against the first stopper 23, and the top screw 211 passes through the first threaded hole 12 , and fixedly connected with the top block 212.

In the embodiment of the present invention, the displacement transmitting member 21 may include a top screw 211 and a top block 212, the top screw 211 is rotatably connected with the top block 212, and the top screw 211 has threads, so that the top screw 211 can cooperate with the first threaded hole 12 , the user can rotate the jacking screw 211 , so that the jacking screw 211 is screwed into the first threaded hole 12 , thereby pushing the jacking block 212 to move, and then driving the first limiting member 23 to move.

It can be known from the above that the above-mentioned displacement transmission member 21 can move between the third position and the fourth position. Referring to FIG. FIG. 5 , when the displacement transmitting member 21 is in the fourth position, the first limiting member 23 is displaced to the second position.

It should be understood that, in the embodiment of the present invention, the disposition position of the displacement transmitting member 21 can be determined according to the actual connection structure, such as the groove type of the sliding groove 11 , the length of the top screw 211 and the length of the first threaded hole 12 . When the displacement transmission part 21 is in the third position, referring to Fig. 3 to Fig. 4, the top screw 211 is completely screwed into the first threaded hole 12; when the displacement transmission part 21 is in the fourth position, referring to Fig. 5 to Fig. 6, the top block 212 may be in contact with the upper surface of the sliding groove 11 .

Since the top screw 211 is threadedly matched with the first threaded hole 12, the user can adjust the position of the first limiter 23 by rotating the top screw 211, and convert the rotation of the top screw 211 into the linear motion of the top block 212, so as to improve the adjustment accuracy. , while preventing the first limiting member 23 from being damaged due to excessive force when it contacts the first connecting member 22, thereby prolonging the service life of the three-dimensional printing device.

Further, the top of the jacking wire 211 can also be provided with a fixed cover 213, and when the displacement transmitting member 21 is in the third position, the fixing cover 213 can be threadedly fastened with the support arm 10 and fixed on the top of the jacking wire 211, thereby avoiding The top wire 211 moves after being fixed, thereby preventing relative movement between the printing platform 30 and the support arm 10 .

Further, the side of the top block 212 facing the first limiting member 23 is a first guiding slope, the side of the first limiting member 23 facing the first guiding slope is a second guiding slope, and the first guiding slope and the second guiding slope are at least Partial fit, and the first guiding slope is in sliding contact with the second guiding slope.

In the embodiment of the present invention, in order to further improve the adjustment accuracy and play a buffering role during adjustment, the side of the top block 212 facing the first limiter 23 can be a first guide slope, and the first limiter 23 faces the first The side of the guide slope can be a second guide slope, through the cooperation between the first guide slope and the second guide slope, the vertical movement of the jacking wire 211 can be converted into the horizontal movement of the top block 212, as shown in Figures 3 to 6 As shown, the displacement transmission member 21 and the first limiting member 23 can be arranged perpendicular to each other, which facilitates the setting of the displacement transmitting member 21, and when the user rotates the top screw 211, it is guided by the top block 212 and the first limiting member 23. The cooperation of the inclined surface further plays a buffer role in the adjustment process and prolongs the service life of the 3D printing equipment.

Optionally, the first limiting member 23 is recessed inward toward the side of the rotating connection portion 221 to form a first curved accommodating cavity, and the second limiting member 24 is recessed inward toward a side of the first curved accommodating cavity to form a second curved surface. Surface accommodating cavity; the rotating connection part 221 is arranged in a spherical shape, and the rotating connecting part 221 is located between the first curved surface accommodating cavity and the second curved surface accommodating cavity;

In the first position, the two sides of the rotating connection part 221 abut against the inner wall of the first curved surface accommodating cavity and the inner wall of the second curved surface accommodating cavity respectively; The cavity and the second curved surface accommodate rotation in the space enclosed by the cavity.

In the embodiment of the present invention, the rotating connecting portion 221 may be arranged in a spherical shape, and the first limiting member 23 and the second limiting member 24 are both recessed inward toward the rotating connecting portion 221 to form a curved accommodating cavity.

In order to prevent the relative rotation of the rotating connecting portion 221 when the first limiting member 23 is at the first position, refer to FIGS. 3 to 4 , which are structural schematic diagrams when the first limiting member is at the first position. The inner wall of the first curved accommodation cavity of the first limiting member 23 fits at least part of the curved surface of the rotating connection portion 221, and the inner wall of the second curved accommodation cavity of the second limiting member 24 also fits with the rotating connecting portion 221. Part of the curved surface fits together, so that the rotating connection part 221 is clamped between the first limiting part 23 and the second limiting part 24 , and the rotation of the rotating connecting part 221 is restricted.

And when the first limiting member 23 is in the second position, referring to FIG. 5 to FIG. 6, FIG. 5 to FIG. 6 are structural schematic diagrams when the first limiting member is in the second position. There is a gap between the inner wall of the accommodating cavity and/or the inner wall of the second curved surface accommodating cavity, so that the rotating connection part 221 can rotate between the first limiting member 23 and the second limiting member 24 .

In the embodiment of the present invention, by setting the rotating connection part 221 into a spherical shape, and setting a first curved surface accommodation cavity and a second curved surface accommodation cavity on the first limiter 23 and the second limiter 24 respectively, thereby When the first limiting member 23 is at the first position, the fixing of the rotating connecting portion 221 is more firm, and when the first limiting member 23 is at the second position, the rotating connecting portion 221 rotates more smoothly, which improves the user’s convenience. experience.

Optionally, the first connecting member 22 further includes a cylindrical connecting portion 222, which is fixedly connected to the rotating connecting portion 221, and the second limiting member 24 is provided with a first through hole 241, and the first through hole 241 is connected to the rotating connecting portion 221. The second curved surface accommodating cavity is connected, and the cylindrical connecting portion 222 passes through the first through hole 241 to connect with the printing platform 30;

The inner diameter of the first through hole 241 is larger than the outer diameter of the cylindrical connecting portion 222 .

Since the other end of the first connecting part 22 opposite to the rotating connecting part 221 needs to be fixedly connected to the printing platform 30, the rotation of the first connecting part 22 can drive the printing platform 30 to rotate. Therefore, in the embodiment of the present invention, referring to FIG. 1 , the first connecting portion may also include a cylindrical connecting portion 222, the opening at one end of the first through hole 241 may be located at the bottom of the second curved surface accommodating cavity, and the opening at the other end may be located at the second limiting member 24 and the second On the opposite side of the curved accommodating cavity, the cylindrical connecting portion 222 passes through the first through hole 241 opened on the second limiting member 24 and is fixedly connected to the printing platform 30 . The shape of the columnar connecting portion 222 can be set according to actual needs, including but not limited to a prism and a cylinder. Generally, in order to increase the rotation angle, the cylindrical connecting portion 222 may be configured as a cylinder, and the outer diameter of the cylindrical connecting portion 222 may be smaller than the outer diameter of the rotating connecting portion 221 .

It should be understood that since the rotation of the rotating connecting portion 221 will drive the cylindrical connecting portion 222 to rotate, in order to provide a rotating space for the cylindrical connecting portion 222 , the inner diameter of the first through hole 241 may be larger than the outer diameter of the cylindrical connecting portion 222 .

Further, the first through hole 241 has an annular step portion 2411 inside, and an elastic member 242 is disposed between the annular step portion 2411 and the rotating connection portion 221 .

In the embodiment of the present invention, in order to make the displacement transmitting member 21 in the fourth position, the first limiting member 23 can reset to the second position by itself. Referring to FIG. 6 , in the first through hole 241 of the second limiting member 24 An annular step portion 2411 may be provided to lock the elastic member 242 . The elastic member 242 is located between the annular step portion 2411 and the rotational connection portion 221 , and can abut against the annular step portion 2411 and the rotational connection portion 221 respectively. When the displacement transmission member 21 is in the first position and the first limiting member 23 is in the first position, the elastic member 242 can be in a compressed state, and when the displacement transmission member 21 is in the second position, the elastic restoring force of the elastic member 242 The rotating connection part 221 can be pushed to move, so as to push the first limiting member 23 to move to the second position.

Specifically, the elastic member 242 can be a spring, and the spring can be sheathed on the cylindrical connecting portion 222, so that the spring can be prevented from falling off during the adjustment process.

Optionally, the three-dimensional printing device further includes a second connecting member 60, and the second connecting member 60 is detachably connected to the leveling assembly 20 and the printing platform 30;

The second connecting piece 60 includes a connecting block 61 . A receiving groove is defined on the connecting block 61 . The receiving groove fits with the cylindrical connecting portion 222 . The cylindrical connecting portion 222 is at least partially accommodated in the receiving groove.

In the embodiment of the present invention, in order to facilitate the disassembly of the leveling assembly 20 and the printing platform 30, the three-dimensional printing device may further include a second connecting member 60. Referring to FIGS. 2 to 6, the second connecting member 60 may include a connecting block 61, The detachable connection with the leveling assembly 20 is realized through the accommodating groove provided inside the connection block 61 .

It can be understood that, the side of the connecting block 61 facing the columnar connecting portion 222 can be provided with an accommodating groove toward the extending direction of the columnar connecting portion 222, and the columnar connecting portion 222 can be partially accommodated in the accommodating groove, so as to Further reduce the space occupation of the overall structure.

The connection manner between the cylindrical connecting portion 222 and the second connecting member 60 can be set according to actual needs. For example, in a specific embodiment, the cylindrical connecting part 222 and the second connecting part 60 can be connected through a screw fit with a screw hole, so that the cylindrical connecting part 222 can be disengaged from the second connecting part 60 by removing the screw; Certainly, in other optional implementation manners, the columnar connecting portion 222 may also be detachably connected to the second connecting member 60 by clamping or bonding.

Similarly, the connection manner between the second connecting member 60 and the printing platform 30 includes but not limited to threaded connection, clamping or bonding, which will not be listed here.

Further, a positioning hole 2221 may be opened on the outer wall of the cylindrical connecting portion 222;

The connecting block 61 corresponds to the position of the positioning hole 2221 , and defines a second threaded hole 611 , and the first screw 612 passes through the second threaded hole 611 and the positioning hole 2221 in sequence, and is threadedly connected with the second threaded hole 611 .

Referring to FIG. 5, the first screw 612 in FIG. 5 can pass through the corresponding positioning hole 2221 after passing through the second threaded hole 611, so that the first screw 612 can realize the positioning of the cylindrical connecting portion 222 in the accommodating groove. limit. It can be understood that, in order to play a limiting role, the inner diameter of the positioning hole 2221 may be equal to or slightly larger than the outer diameter of the thread of the first screw 612 .

The number of positioning holes 2221 can be set according to actual needs. Continuing to refer to FIG. 5 , in FIG. 5 , a plurality of positioning holes 2221 may be distributed along the circumference of the cylindrical connecting portion 222 to limit the cylindrical connecting portion 222 from all directions.

Further, the second connecting piece 60 may also include a connecting bracket 62, the connecting bracket 62 includes a first connecting arm 621, a second connecting arm 622 and a fixing plate 623, one end of the first connecting arm 621 is connected to the fixing plate 623, and the other end Connected to the printing platform 30, one end of the second connecting arm 622 is connected to the fixed plate 623, and the other end is connected to the printing platform 30; the connecting block 61 is sandwiched between the first connecting arm 621 and the second connecting arm 622, and the connecting block 61 is detachably connected to the fixing plate 623.

In the embodiment of the present invention, referring to FIG. 8 , the first connecting arm 621 and the second connecting arm 622 of the connecting bracket 62 can clamp the connecting block 61 , and the fixing plate 623 is attached to the connecting block 61 . Specifically, an opening may be provided on the fixing plate 623, and a third threaded hole may be provided on the connecting block 61 corresponding to the opening, so that by setting the second screw 63, the second screw 63 passes through the opening of the fixing plate 623 and The third threaded hole is threaded to fix the fixing plate 623 and the connecting block 61 .

Specifically, the second screw 63 can be fixedly connected with the handle, and usually the user can disassemble the second screw 63 by turning the handle, so that the user can easily release the fixation between the connecting bracket 62 and the second connecting block 61 .

The connection manner between the first connecting arm 621 and the second connecting arm 622 and the fixing plate 623 can be set according to actual needs, including but not limited to threaded connection, clamping or bonding. Continuing to refer to FIG. 7 , in FIG. 7 , one end of the first connecting arm 621 and one end of the second connecting arm 622 can be detachably fixed to the printing platform 30 by means of screws fitting into screw holes.

The implementation of the present invention will be described below with a specific embodiment. Referring to FIGS.

The leveling assembly 20 includes a first stopper 23 and a first connecting member 22, the first stopper 23 is slidably connected with the support arm 10, one end of the first link 22 is a rotating connection part 221, and the rotating connection part and the support arm connected, and the other end of the first connector is connected to the printing platform;

Wherein, the leveling assembly 20 also includes a displacement transmitting member 21 and a second limiting member 24, the second limiting member 24 is fixedly connected with the support arm 10, and the rotating connection part 221 is located between the first limiting member 23 and the second limiting member. 24, the displacement transmitting member 21 is connected with the first limiting member 23 to drive the first limiting member 23 to move between the first position and the second position;

Wherein, the support arm 10 defines a sliding groove 11 , and the first limiting member 23 is located in the sliding groove 11 and can slide in the sliding groove 11 .

Wherein, the displacement transmitting member 21 includes a top screw 211 and a top block 212, and the support arm 10 is provided with a first threaded hole 12, and the opening at one end of the first threaded hole 12 is set on one side of the support arm 10, and the opening at the other end is set on a sliding The inner wall of the groove 11, so that the first threaded hole 12 can communicate with the sliding groove 11, the top block 212 is located in the sliding groove 11, and abuts against the first stopper 23, the top screw 211 passes through the first threaded hole 12, and It is fixedly connected with the top block 212.

Wherein, the first limiting member 23 is recessed inward toward the side of the rotating connection portion 221 to form a first curved accommodation cavity, and the second limiting member 24 is recessed inward toward the side of the first curved accommodation cavity to form a second curved accommodation. cavity; the rotating connection part 221 is arranged in a spherical shape, and the rotating connecting part 221 is located between the first curved surface accommodation cavity and the second curved surface accommodation cavity;

Wherein, the first connecting piece 22 also includes a cylindrical connecting portion 222, which is fixedly connected with the rotating connecting portion 221, and the second limiting member 24 is provided with a first through hole 241, and the first through hole 241 is connected to the second The curved accommodating cavity is connected, and the cylindrical connecting portion 222 passes through the first through hole 241 to connect with the printing platform 30;

Wherein, the first through hole 241 has an annular step portion 2411 , and an elastic member 242 is disposed between the annular step portion 2411 and the rotating connection portion 221 . The elastic member 242 is used to provide an elastic restoring force to reset the first limiting member 23 to the second position.

Wherein, the three-dimensional printing device further includes a second connecting member 60, and the second connecting member 60 is detachably connected to the leveling assembly 20 and the printing platform 30;

Wherein, a positioning hole 2221 may be opened on the outer wall of the cylindrical connecting portion 222;

Wherein, the second connecting piece 60 can also include a connecting bracket 62, and the connecting bracket 62 includes a first connecting arm 621, a second connecting arm 622 and a fixing plate 623, one end of the first connecting arm 621 is connected with the fixing plate 623, and the other end is connected with the fixing plate 623. The printing platform 30 is connected, one end of the second connecting arm 622 is connected to the fixing plate 623, and the other end is connected to the printing platform 30; the connecting block 61 is sandwiched between the first connecting arm 621 and the second connecting arm 622, and the connecting block 61 It is detachably connected with the fixing plate 623.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present invention, and should cover Within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

A three-dimensional printing device, characterized in that it includes a support arm, a leveling assembly, and a printing platform, wherein the leveling assembly includes a first limiting member and a first connecting member, and the first limiting member is connected to the The support arm is slidingly connected, one end of the first connecting part is a rotating connection part, the rotating connecting part is connected to the supporting arm, and the other end of the first connecting part is connected to the printing platform;

The first limiting member can move between a first position and a second position. In the first position, the first limiting member cooperates with the support arm to fix the rotating connection portion. In the second position, the rotational connection part is rotationally connected with the support arm.
The three-dimensional printing device according to claim 1, wherein the leveling assembly further includes a displacement transmission member and a second limiting member, the second limiting member is fixedly connected to the support arm, and the rotating The connecting part is located between the first limiting member and the second limiting member, and the displacement transmission member is connected with the first limiting member to drive the first limiting member between the first position and the second limiting member. move between second positions;

In the first position, both the first limiting member and the second limiting member are in contact with the rotating connecting portion; in the second position, the rotating connecting portion can Rotate between the limiting member and the second limiting member.
The three-dimensional printing device according to claim 1, wherein the first limiting member is a screw, and at the first position, one end of the first limiting member passes through the first connecting member, And it is threadedly connected with the support arm, and at the second position, the first limiting member is out of fixation with the support arm.
The three-dimensional printing device according to claim 2, wherein the support arm is provided with a sliding groove, and the first limiting member is located in the sliding groove and can slide in the sliding groove.
The three-dimensional printing device according to claim 4, wherein the displacement transmission member includes a top wire and a top block, and the support arm is provided with a first threaded hole, and the first threaded hole communicates with the sliding groove , the jacking block is located in the sliding groove and abuts against the first limiting member, and the jacking wire passes through the first threaded hole and is fixedly connected with the jacking block.
The three-dimensional printing device according to claim 5, wherein the side of the top block facing the first limiting member is a first guiding slope, and the side of the first limiting member facing the top block is the second Two guide slopes, the first guide slope and the second guide slope are at least partially attached, and the first guide slope is in sliding contact with the second guide slope.
The three-dimensional printing device according to claim 2, characterized in that, the side of the first limiting member facing the rotating connection part is inwardly recessed to form a first curved accommodating cavity, and the second limiting member faces toward the The side of the first curved surface accommodation cavity is recessed inwardly to form a second curved surface accommodation cavity; the rotating connection part is arranged in a spherical shape, and the rotation connecting part is located between the first curved surface accommodation cavity and the second curved surface accommodation cavity. between the cavities;

In the first position, the two sides of the rotating connection part abut against the inner wall of the first curved storage cavity and the inner wall of the second curved storage cavity respectively; in the second position, the The rotating connection part can rotate in the space enclosed by the first curved accommodation cavity and the second curved accommodation cavity.
The three-dimensional printing device according to claim 7, wherein the first connecting member further includes a cylindrical connecting portion, the cylindrical connecting portion is fixedly connected to the rotating connecting portion, and the second limiting member A first through hole is opened, and the first through hole communicates with the second curved surface accommodation cavity, and the columnar connecting portion passes through the first through hole to connect with the printing platform;

The inner diameter of the first through hole is larger than the outer diameter of the cylindrical connecting portion.
The three-dimensional printing device according to claim 8, characterized in that, there is an annular step in the first through hole, and an elastic member is arranged between the annular step and the rotating connection portion.
The three-dimensional printing device according to claim 8, characterized in that, the three-dimensional printing device further comprises a second connecting member, and the second connecting member is detachably connected to the leveling assembly and the printing platform;

The second connecting piece includes a connecting block, and the connecting block is provided with an accommodating groove, and the accommodating groove is adapted to the cylindrical connecting part, and the cylindrical connecting part is at least partially accommodated in the accommodating part. Put it in the groove.
The three-dimensional printing device according to claim 10, wherein a positioning hole is opened on the outer wall of the cylindrical connecting part;

The connecting block is provided with a second threaded hole corresponding to the location of the positioning hole, and the first screw passes through the second threaded hole and the positioning hole in sequence, and is threadedly connected with the second threaded hole.
The three-dimensional printing device according to claim 10, wherein the second connecting member further includes a connecting bracket, the connecting bracket includes a first connecting arm, a second connecting arm and a fixing plate, and the first connecting arm One end of the second connecting arm is connected to the fixed plate, the other end is connected to the printing platform, one end of the second connecting arm is connected to the fixed plate, and the other end is connected to the printing platform; the connecting block is sandwiched between the between the first connecting arm and the second connecting arm, and the connecting block is detachably connected to the fixing plate.