CN215283378U

CN215283378U - 3D printer

Info

Publication number: CN215283378U
Application number: CN202120285365.9U
Authority: CN
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 范淦恩; 王瑜佳; 李勇
Original assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Current assignee: Shenzhen Chuangxiang 3D Technology Co Ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-12-24
Anticipated expiration: 2031-02-01

Abstract

The utility model discloses a 3D printer relates to 3D and prints technical field. This 3D printer includes control box, three first driving piece, three initiative arm, three driven arm, printing shower nozzle and platform subassembly. The three first driving members are distributed along the circumferential direction of the control box. One end of each driving arm is connected with the output end of one first driving piece. One end of each driven arm is rotatably connected with the other end of one driving arm. The printing nozzle is rotatably connected with the other ends of the three driven arms. The platform assembly is adjustably positioned below the print head. This 3D printer can improve and print the precision, print scope, mechanism rigidity and print speed.

Description

3D printer

Technical Field

The utility model relates to a 3D prints technical field, especially relates to a 3D printer.

Background

The field of 3D printing technology application is wider and wider under the promotion of computer digital technology intellectualization, and particularly the FDM hot melting technology is favored by DIY fans more and more. However, most of 3D printers on the market drive the print head to move by using a cartesian coordinate system structure or a croxy coordinate system structure, but both of the above driving structures have the disadvantages of relatively low printing precision, small printing range, small mechanism rigidity and slow printing speed.

Therefore, there is a need for a 3D printer that can improve printing accuracy, printing range, mechanism stiffness, and printing speed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 3D printer can improve and print the precision, print scope, mechanism rigidity and print speed.

For realizing the technical effect, the utility model discloses a technical scheme of 3D printer as follows:

a 3D printer, comprising: the control box is used for installing a control system; the three first driving pieces are distributed along the circumferential direction of the control box; one end of each driving arm is connected with the output end of one first driving piece; one end of each driven arm is rotatably connected with the other end of one driving arm; the printing spray head is rotatably connected with the other ends of the three driven arms; and the platform assembly is arranged below the printing spray head in a position adjustable manner. The three first driving parts, the three driving arms and the three driven arms can form a delta robot, the delta robot can drive the printing nozzle to move in a three-dimensional space, the printing nozzle can rapidly move in a smaller three-dimensional space, the motion inertia of the printing nozzle is reduced, and therefore the printing precision and the printing efficiency of 3D printing are improved; meanwhile, the delta robot has higher rigidity so as to improve the rigidity of the mechanism; in addition, because the platform assembly is arranged below the printing spray head in an adjustable position, the moving range of the printing spray head relative to the platform assembly can be enlarged, and the printing range is enlarged.

Further, the platform assembly comprises: a drive assembly; and the printing platform is connected with the output end of the driving component. The drive assembly can drive the printing platform to move relative to the printing nozzle, so that the printing range is improved.

Further, the drive assembly includes: a first rail extending in an X-axis direction; the first sliding block is arranged on the first guide rail in a sliding manner; the second guide rail extends along the Y-axis direction and is arranged on the first sliding block; and the second sliding block is arranged on the second guide rail in a sliding manner, and the printing platform is arranged on the second guide rail. The structure can reduce the cost of the driving assembly on the premise of improving the printing range.

Further, the drive assembly includes: a second driving member; the two rotating parts are arranged at intervals, and one rotating part is connected with the output end of the second driving part; the transmission parts are wound on the two rotating parts, and the printing platform is arranged on the transmission parts. Above-mentioned structure can realize printing the relative print platform of shower nozzle and move at infinite length within range to can realize the 3D of infinite length scope and print.

Further, the transmission member includes a flat belt. The flat belt transmission is stable, can reduce the negative effects that the driving medium caused print platform.

Furthermore, two ends of the driven arm are respectively connected with the driving arm and the printing nozzle in a rotating mode through spherical hinges. The ball hinge connection can improve the connection reliability of the driven arm and the driving arm and reduce the jamming phenomenon.

Further, the 3D printer still includes the locating part, the one end of locating part with the control box is connected, the other end telescopically with it is connected to print the shower nozzle, the locating part is used for restricting print the shower nozzle in the ascending stroke of Z axle direction. The locating part can prevent the drive printing nozzle from moving to other positions and damaging the driving arm and the driven arm when the driving arm and the driven arm are in failure, and normal operation of the printing nozzle is ensured.

Further, the stopper includes: one end of the first limiting part is rotatably connected with the control box through a ball hinge; one end of the second limiting part is adjustably arranged at the other end of the first limiting part in a penetrating mode, and the other end of the second limiting part is rotatably connected with the printing spray head through a ball hinge; and the limiting block is arranged on the second limiting part and can be abutted against the end part of the first limiting part. The structure ensures that the limiting part cannot interfere with the movement of the printing nozzle and can ensure the limiting effect of the limiting part.

Furthermore, the driven arm comprises two driven rods, and two sides of the driving arm are respectively connected with one driven rod in a rotating mode. The two driven rods can improve the stability of the driven arm transmission.

Furthermore, the central axis of the output end of the first driving piece is tangent to the circumferential direction of the control box, and the driving arm is driven to rotate around the central axis of the first driving piece. The structure can improve the reliability of the mechanism for driving the printing nozzle to move.

The utility model has the advantages that: the three first driving parts, the three driving arms and the three driven arms can form a delta robot, the delta robot can drive the printing nozzle to move in a three-dimensional space, the printing nozzle can rapidly move in a smaller three-dimensional space, the motion inertia of the printing nozzle is reduced, and therefore the printing precision and the printing efficiency of 3D printing are improved; meanwhile, the delta robot has higher rigidity so as to improve the rigidity of the mechanism; in addition, because the platform assembly is arranged below the printing spray head in an adjustable position, the moving range of the printing spray head relative to the platform assembly can be enlarged, and the printing range is enlarged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of a 3D printer provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a 3D printer provided by embodiment 2 of the present invention.

Reference numerals

1. A control box; 2. a first driving member; 3. an active arm; 4. a driven arm;

5. printing a spray head; 6. a printing platform;

71. a first guide rail; 72. a first slider; 73. a second guide rail; 74. a rotating member; 75. a transmission member.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the term "connected" is to be understood in a broad sense, e.g. fixedly connected, detachably connected, or integral; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the reference to a first feature "on", "above" or "above" a second feature means that the first feature is directly above and obliquely above the second feature, or that only the first feature is at a higher level than the second feature.

It is to be understood that the terms "central," "upper," "lower," "vertical," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example 1

A specific structure of the 3D printer of the present embodiment is described with reference to fig. 1.

As shown in fig. 1, the embodiment of the 3D printer includes a control box 1, three first driving members 2, three driving arms 3, three driven arms 4, a printing head 5 and a platform assembly. The control box 1 is used for installing a control system. The three first drivers 2 are distributed in the circumferential direction of the control box 1. One end of each driving arm 3 is connected with the output end of one first driving piece 2. One end of each driven arm 4 is rotatably connected to the other end of one driving arm 3. The printing head 5 is rotatably connected to the other ends of the three follower arms 4. The platform assembly is adjustably positioned below the print head 5.

In the 3D printer, the three first driving parts 2, the three driving arms 3 and the three driven arms 4 can form a delta robot, when the driving arms 3 are driven by the first driving parts 2 to rotate, the driving arms 3 can drive the driven arms 4 to rotate, the printing nozzle 5 can realize the movement of the degrees of freedom in the X axis, the Y axis and the Z axis under the drive of the three driven arms 4, and can realize any adjusting function within a range of 180 degrees, so that the printing nozzle 5 can move in a three-dimensional space, compared with the prior art in which the movement of the printing nozzle 5 in the three-dimensional space is realized through a gantry structure, the printing nozzle 5 driven by the delta robot can realize the rapid movement in a smaller three-dimensional space, thereby improving the printing precision and the printing efficiency of 3D printing; meanwhile, as the gantry structure is not limited in movement in three specific directions of an X axis, a Y axis and a Z axis, the movement inertia of the printing nozzle 5 can be obviously reduced, so that related algorithm programs can be input according to actual requirements, the movement precision and the repetition precision of the printing nozzle 5 are further improved, and the printing precision and the printing efficiency of 3D printing are further improved; in addition, because no longer use the portal frame structure, just also need not to pass through linear bearing, the motion of shower nozzle 5 is printed in multiple mechanical movement pair realization such as lead screw or gyro wheel, not only can improve the rigidity of whole 3D printer, can also improve the stability of 3D printer, and first driving piece 2, driving arm 3, driven arm 4 and print the relation of connection between the shower nozzle 5 and be the rotation connection, need not to set up gyro wheel or the linear bearing who is used for realizing linear motion, thereby the use quantity of vulnerable part has been reduced, the life of extension 3D printer, and be convenient for realize the dismouting and the maintenance of 3D printer.

In addition, because the delta robot of this embodiment can realize better that print shower nozzle 5 is in the reliable motion of three-dimensional space, and the platform subassembly is established below printing shower nozzle 5 with adjustable position again simultaneously, and in delta drive printing shower nozzle 5 motion process, the platform subassembly also can print shower nozzle 5 motion relatively, makes printing shower nozzle 5 relative motion scope on the platform subassembly bigger, and relative motion size is also bigger to show the application scope that has improved 3D and printed, improved the flexibility of whole machine.

It should be noted that, the control system in the control box 1 can control the three first driving members 2 to drive the three driving arms 3 and the three driven arms 4 to move according to the actual printing requirement, and the communication logic and relation between the control system and the three first driving members 2 are not the key points of the present invention, even if the specific model and control mode of the control system and the three first driving members 2 are not mentioned in the present specification, the above functions can be realized by the skilled person in the art according to the technical common knowledge in the automatic control field of the prior art.

In the present embodiment, as shown in fig. 1, the stage assembly includes a driving assembly and a printing stage 6. The printing platform 6 is connected with the output end of the driving assembly. The printing platform 6 can move relative to the printing nozzle 5 under the driving action of the driving component, so that the relative motion range between the printing nozzle 5 and the printing platform 6 is improved.

In the present embodiment, as shown in fig. 1, the driving assembly includes a first guide rail 71, a first slider 72, a second guide rail 73, and a second slider. The first guide rail 71 extends in the X-axis direction. The first slider 72 is slidably disposed on the first rail 71. The second rail 73 extends in the Y-axis direction, and the second rail 73 is provided on the first slider 72. The second slider is slidably disposed on the second rail 73, and the printing platform 6 is disposed on the second rail 73. delta robot can realize more stably reliably that print shower nozzle 5 is at the ascending motion of vertical direction, and print platform 6 is used for bearing the printing model usually, and from this, print shower nozzle 5 and print platform 6 relative motion in the Z axle direction can only be realized through delta robot's motion to need not to drive print platform 6 through drive assembly and move in the Z axle direction, reduced drive assembly's equipment cost. Meanwhile, the movement of the printing platform 6 in the directions of the X axis and the Y axis can be reliably realized through the structures of the first guide rail 71, the first sliding block 72, the second guide rail 73 and the second sliding block, so that the relative printing area of the printing nozzle 5 is further increased, and the application range of the 3D printer is further increased.

Specifically, in the present embodiment, the first guide rail 71 and the second guide rail 73 can be configured as one or more of a linear guide rail, a screw rod, or a roller.

In the present embodiment, as shown in fig. 1, the driven arm 4 includes two driven links, and both sides of the driving arm 3 are rotatably connected to one driven link, respectively. The two driven rods can realize the transmission stability of the driven arm 4, so that the motion reliability of the whole delta robot is improved, and the printing nozzle 5 can be stably moved to a preset position under the driving of the delta robot.

In the present embodiment, as shown in fig. 1, the central axis of the output end of the first driving member 2 is tangential to the circumferential direction of the control box 1, and the driving arm 3 is driven to rotate around the central axis of the first driving member 2. Through the structure, the driving arms 3 rotate in the vertical direction in the radial direction of the control box 1 in the rotating process, so that the three driving arms 3 move more stably and reliably, the movement track of the printing nozzle 5 is calculated through a related algorithm, and the movement reliability of the printing nozzle 5 is improved.

In the present embodiment, as shown in fig. 1, both ends of the driven arm 4 are rotatably connected to the driving arm 3 and the print head 5, respectively, by ball hinges. The ball hinge is connected in a rotating mode, the driven arm 4 and the driving arm 3 can be guaranteed to be connected with the printing nozzle 5 in a three-dimensional space in a connecting mode, the connecting relation with multiple different angles is formed, and therefore the printing nozzle 5 can move at any position in the three-dimensional space.

In this embodiment, the 3D printer further includes a limiting member (not shown), one end of the limiting member is connected to the control box 1, and the other end of the limiting member is telescopically connected to the print head 5, and the limiting member is configured to limit a stroke of the print head 5 in the Z-axis direction. When the delta robot drives the printing nozzle 5 to move in a three-dimensional space, the possibility that the delta robot breaks down and causes the printing nozzle 5 to collide with other structures exists, and the 3D printer is easily damaged. Because the locating part can limit the stroke of the printing nozzle 5 in the Z-axis direction, when the delta robot breaks down, the position of the printing nozzle 5 in the Z-axis direction is still located in a safety range, the failure damage rate of the 3D printer is reduced, and the normal and reliable operation of the 3D printer is ensured.

In this embodiment, the position-limiting member includes a first position-limiting portion and a second position-limiting portion. One end of the first limiting part is rotatably connected with the control box 1 through a ball hinge. One end position of the second limiting part is adjustably arranged at the other end of the first limiting part in a penetrating mode, and the other end of the second limiting part is rotatably connected with the printing nozzle 5 through a ball hinge. The limiting block is arranged on the second limiting part and can be abutted against the end part of the first limiting part. The first limiting part is rotatably connected with the control box 1 through a ball hinge, the second limiting part is rotatably connected with the printing nozzle 5 through the ball hinge, and the first limiting part and the second limiting part can not hinder the delta robot to drive the printing nozzle 5 to move in a three-dimensional space when the limiting function is realized, so that the movement interference of the limiting part on the printing nozzle 5 is reduced. In addition, when the limiting block abuts against the first limiting portion, it is stated that the overall length of the first limiting portion and the second limiting portion is in the shortest state, so that the limiting block limits the printing nozzle 5 in the Z-axis direction. The mechanical limit of the limit block is stable and reliable, and the cost is low, so that the overall cost of the 3D printer can be reduced.

Exemplarily, the first limiting part and the second limiting part both comprise rigid pipes, and the second limiting part is arranged in the first limiting part in a penetrating manner.

Example 2

A specific structure of the 3D printer of the present embodiment is described with reference to fig. 2.

The 3D printer of this embodiment has substantially the same structure as that of embodiment 1, and the difference between the two is the structure of the driving assembly, and only the difference between the two is described here, and the structure of this embodiment that is the same as that of embodiment 1 is not described again here.

In this embodiment, as shown in fig. 2, the driving assembly includes a second driving member, two spaced rotating members 74 and a transmission member 75. A rotary member 74 is connected to the output of the second drive member. The transmission member 75 is wound around the two rotation members 74, and the printing platform 6 is disposed on the transmission member 75. One rotates piece 74 and rotates under the drive of second driving piece, and drive driving medium 75 and move, and then drive another rotation piece 74 and rotate, in this motion process, driving medium 75 can drive print platform 6 and move, because driving medium 75 can be under the drive of second driving piece infinite motion in-process, be equivalent to the relative installation body motion of print platform 6 that has infinite length promptly, also be equivalent to print shower nozzle 5 and can carry out 3D to its print platform 6 that has infinite length relatively and print, thereby be applicable to the 3D printing that has longer length model, the application scope of 3D printer has been showing to be improved.

In the present embodiment, as shown in fig. 2, the transmission member 75 includes a flat belt. Comparatively steady uniform motion can be realized to the flat belt to make print platform 6 remove with the relative installation body of steady speed, improved print platform 6's motion reliability, be favorable to going on stably of 3D printing, thereby improve and print the precision, reduce and print the error.

Specifically, in the present embodiment, the rotating member 74 can be configured as a roller, and the second driving member can be configured as a servo motor, so as to further improve the stability of the driving assembly driving the printing platform 6.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. A3D printer, comprising:

the control box (1) is used for installing a control system;

three first driving pieces (2), wherein the three first driving pieces (2) are distributed along the circumferential direction of the control box (1);

one end of each active arm (3) is connected with the output end of one first driving piece (2);

one end of each driven arm (4) is rotatably connected with the other end of one driving arm (3);

the printing spray heads (5) are rotatably connected with the other ends of the three driven arms (4);

a platform assembly adjustably positioned below the print head (5).

2. The 3D printer of claim 1, the platform assembly comprising:

a drive assembly;

a printing platform (6), the printing platform (6) being connected to the output of the drive assembly.

3. The 3D printer of claim 2, wherein the drive assembly comprises:

a first rail (71), the first rail (71) extending in the X-axis direction;

the first sliding block (72) is arranged on the first guide rail (71) in a sliding mode;

a second guide rail (73), wherein the second guide rail (73) extends along the Y-axis direction, and the second guide rail (73) is arranged on the first sliding block (72);

the second sliding block is arranged on the second guide rail (73) in a sliding mode, and the printing platform (6) is arranged on the second guide rail (73).

4. The 3D printer of claim 2, wherein the drive assembly comprises:

a second driving member;

two rotating pieces (74) arranged at intervals, wherein one rotating piece (74) is connected with the output end of the second driving piece;

the transmission piece (75), transmission piece (75) are around locating two rotate on the piece (74), establish print platform (6) on transmission piece (75).

5. The 3D printer according to claim 4, characterized in that the transmission member (75) comprises a flat belt.

6. The 3D printer according to any of claims 1 to 5, characterized in that the two ends of the driven arm (4) are rotatably connected with the driving arm (3) and the print head (5) respectively by means of ball hinges.

7. The 3D printer according to any one of claims 1 to 5, further comprising a limiting member, one end of the limiting member is connected to the control box (1), and the other end of the limiting member is telescopically connected to the printing nozzle (5), and the limiting member is used for limiting the stroke of the printing nozzle (5) in the Z-axis direction.

8. The 3D printer of claim 7, wherein the limiter comprises:

one end of the first limiting part is rotatably connected with the control box (1) through a ball hinge;

one end of the second limiting part is adjustably arranged at the other end of the first limiting part in a penetrating mode, and the other end of the second limiting part is rotatably connected with the printing spray head (5) through a ball hinge;

and the limiting block is arranged on the second limiting part and can be abutted against the end part of the first limiting part.

9. The 3D printer according to any one of claims 1 to 5, characterized in that the driven arm (4) comprises two driven levers, one of which is rotatably connected to each of the two sides of the driving arm (3).

10. The 3D printer according to any of claims 1-5, characterized in that the central axis of the output end of the first drive (2) is tangential to the circumference of the control box (1) and drives the active arm (3) to rotate around the central axis of the first drive (2).