WO2022062249A1

WO2022062249A1 - Double-z-axis driving structure and single-nozzle 3d printer having same

Info

Publication number: WO2022062249A1
Application number: PCT/CN2020/140538
Authority: WO
Inventors: 刘辉林; 唐京科; 陈春; 敖丹军; 许佳
Original assignee: 深圳市创想三维科技有限公司
Priority date: 2020-09-23
Filing date: 2020-12-29
Publication date: 2022-03-31
Also published as: CN213472205U

Abstract

Disclosed in the present utility model are a double-Z-axis driving structure and a single-nozzle 3D printer having same. The double-Z-axis driving structure comprises a platform, a bracket provided on the platform, and a cross beam slidably provided on the bracket and located above the platform; a first motor and a second motor arranged at intervals are provided on one side of the lower end of the bracket; the upper end of the first motor is provided with a first lead screw which is transmittingly connected to the first motor and is vertically provided; the upper end of the second motor is provided with a first lead screw which is transmittingly connected to the second motor and is vertically provided; the two ends of the cross beam are respectively fixed on the first lead screw and the second lead screw by means of lead screw nuts; the upper ends of the first lead screw and the second lead screw are respectively provided with a first synchronizing wheel and a second synchronizing wheel; the first synchronizing wheel and the second synchronizing wheel are connected by a synchronous belt. In the present utility model, by means of a double-motor double-lead screw driving mode, the balance and stability of the cross beam in the moving process are improved; moreover, the synchronous belt is added between the two lead screws to ensure the synchronization of the two lead screws, thereby causing the cross beam and the platform to be always kept parallel.

Description

A dual Z-axis drive structure and a single-nozzle 3D printer with the same

technical field

The utility model belongs to the technical field of 3D printing platforms, in particular to a dual Z-axis drive structure and a single-nozzle 3D printer having the same.

Background technique

3D printer is a machine of rapid prototyping technology. It is based on digital model files, using special wax materials, powdered metals or plastics and other adhesive materials to create three-dimensional objects by printing layers of adhesive materials. ; FDM (Fused Deposition Rapid Prototyping) is currently the most widely used 3D printing technology. 3D printers using FDM technology use linear consumables, which are melted and deposited on the working platform. At this stage, most of the FDM 3D printer structure Generally, it includes X, Y or Z-axis motion mechanisms, while the Z-axis motion mechanism generally adopts a single motor and single-screw drive mode. Both the bearing capacity of the lead screw and the function of the motor have put forward higher requirements, which will lead to the continuous increase of the cost, and it is easy to cause the problem of swinging of the X-axis motion mechanism, and the balance and stability are poor, resulting in the X-axis motion mechanism and The printing platform below cannot be kept parallel, which will affect the printing effect, and will affect the service life of the Z-axis motion mechanism.

Utility model content

The purpose of the utility model is to provide a double Z-axis drive structure in order to overcome the existing technical defects. Through the drive mode of double motors and double screws, the balance and stability of the beam during the up and down movement are improved, and the two A synchronous belt is added between the screws to ensure the synchronization of the two screws, so that the beam and the platform are always kept parallel.

In order to solve the above-mentioned technical problems, the present invention provides a double Z-axis drive structure, which includes a platform, a bracket arranged on the platform, and a beam that slides up and down on the bracket and is located above the platform. There are two first and second motors arranged at intervals, the upper end of the first motor is provided with a first lead screw that is connected to the drive and is vertically arranged, and the upper end of the second motor is provided with a drive connected to it and is vertically arranged. The second lead screw arranged straight, the two ends of the beam are respectively fixed on the first lead screw and the second lead screw through lead screw nuts, and the upper ends of the first lead screw and the second lead screw are respectively provided with The first synchronous wheel and the second synchronous wheel are connected by a synchronous belt.

Further, the upper end of the bracket is provided with a fixed seat at the position corresponding to the first lead screw and the second lead screw, and the upper ends of the first lead screw and the second lead screw are rotatably connected with the fixed seat through a bearing. .

Further, the support includes a first vertical rod, a second vertical rod vertically arranged on both sides of the platform surface, and a cross rod arranged across the top of the first vertical rod and the second vertical rod, the first vertical rod A motor and a second motor are respectively arranged on the lower ends of the first vertical rod and the second vertical rod, and the upper ends of the first vertical rod and the second vertical rod are each provided with a fixed seat.

Further, the fixing base is a right-angled shape arranged downward, wherein a right-angled side is fixed to the first vertical rod or the second vertical rod, and the other right-angled side is parallel to the platform.

Further, both ends of the beam are respectively connected with the lead screw nut through a first fixing block and a second fixing block.

Further, a first pulley and a second pulley that are respectively clamped on the inner and outer sides of the first vertical rod are rotatably provided on the first fixing block, and the second fixing block is rotatably provided with a first pulley and a second pulley clamped respectively on the inner and outer sides of the first vertical rod. The third pulley and the fourth pulley on the inner and outer sides of the second vertical rod.

Further, guide grooves for the sliding of the pulley are vertically arranged between the inner and outer sides of the first vertical rod and the second vertical rod.

Further, the first fixing block includes a first front fixing plate and a first rear fixing plate arranged on both sides of the bracket, and the second fixing block includes a second front fixing plate and a second rear fixing plate arranged on both sides of the bracket. fixing plate, the first front fixing plate and the second front fixing plate are both fixed with screw nuts, the two ends of the beam are respectively fixed with the first rear fixing plate and the second rear fixing plate, the first Both the pulley and the second pulley are arranged between the first front fixing plate and the first rear fixing plate through the rotation shaft, and the third pulley and the fourth pulley are both arranged on the second front fixing plate and the second front fixing plate through the rotation shaft. between the second rear fixing plate.

Further, the platform includes a bottom plate and a first profile bar and a second profile bar respectively arranged on both sides of the bottom plate, the first vertical bar and the second vertical bar are respectively arranged on the first profile bar and the second profile bar, and the cross bar is There is a handle in the middle of the upper end.

The utility model further provides a single-nozzle 3D printer, which includes the above-mentioned dual Z-axis drive structure, a nozzle mechanism slidably arranged on the beam and used for printing, and an X-axis belt for driving the nozzle mechanism to move. A conveying mechanism, a printing platform slidably arranged on the bottom plate, and a Y-axis belt conveying mechanism for driving the printing platform to move, and the nozzle mechanism is located above the printing platform.

The utility model has the following beneficial effects: through the driving mode of double motors and double leadscrews, the balance and stability of the beam in the process of moving up and down are improved, and the bearing capacity borne by the lead screws and the lead screws is reduced, and the two motors are driven by two motors. At the same time, the driving force is provided, so a low-power motor and a low-load lead screw can be used, which can greatly reduce the cost and improve its service life, and add a synchronous belt between the two lead screws to ensure the synchronization of the two lead screws and realize dual motors. Synchronous drive, so that the beam and the platform are always kept parallel; there is also a fixed seat for fixing the lead screw on the bracket, so as to ensure that the lead screw will not swing during the movement, and the synchronous belt can always be in a tensioned state , to ensure that the synchronization of the two screws remains stable and good.

Additional aspects and advantages of the present invention will be set forth in part in the following description, which will become apparent from the following description, or will be learned by practice of the present invention.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present utility model and constitute a part of this application, and do not constitute an improper limitation to the present utility model. In the accompanying drawings:

1 is a schematic diagram of a dual Z-axis drive structure in an embodiment;

Fig. 2 is the schematic diagram after the beam, the fixed block and the pulley are combined in the embodiment;

Fig. 3 is the schematic diagram of the first vertical rod in the embodiment;

4 is a schematic diagram of the combination of the cross beam and the X-axis belt transmission mechanism in Embodiment 2;

Fig. 5 is the schematic diagram of the tensioning adjustment mechanism in embodiment 2;

6 is a schematic diagram of the tensioning adjustment mechanism in Embodiment 2 after removing the outer casing;

7 is a schematic diagram of the combination of the bottom plate and the printing platform in Embodiment 2;

FIG. 8 is a schematic diagram of the bottom surface of the printing platform combined with the Y-axis belt conveying mechanism in Embodiment 2. FIG.

In the accompanying drawings, the list of components represented by each number is as follows:

1, beam, 2, first motor, 3, second motor, 4, coupling, 5, first screw, 6, second screw, 7, screw nut, 8, first synchronizing wheel, 9 , Second synchronous wheel, 10, Timing belt, 11, Fixed seat, 20, Guide groove, 21, First vertical rod, 22, Second vertical rod, 23, Cross rod, 211, First pulley, 212, Second pulley, 222, fourth pulley, 24, first front fixing plate, 25, first rear fixing plate, 26, second front fixing plate, 27, second rear fixing plate, 28, handle, 31, bottom plate, 32 , first profile, 33, second profile, 40, nozzle mechanism, 41, third motor, 411, driving wheel, 42, shell, 43, U-shaped frame, 44, driven wheel, 45, screw, 46, X axis Sliding assembly, 47, X-axis belt, 50, printing platform, 51, sliding rail, 52, Y-axis belt, 53, fourth motor, 54, Y-axis sliding assembly.

detailed description:

In order to more fully understand the technical content of the present utility model, the present utility model will be further introduced and explained below in conjunction with the accompanying drawings and specific embodiments; it should be noted that, if there are descriptions such as "first" and "second" in the text , is used to distinguish different components, etc., and does not represent the order, nor does it limit that "first" and "second" are of different types.

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. Example; based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

Example 1

As shown in Figures 1-3, a dual Z-axis drive structure shown in this embodiment includes a platform, a bracket disposed on the platform, and a beam 1 that slides up and down on the bracket and is located above the platform. The lower end of the bracket is a There are two first motors 2 and second motors 3 arranged at intervals on the side. The upper end of the first motor 2 is provided with a first lead screw 5 which is drivingly connected with it and is vertically arranged through the coupling 4. The upper end is provided with a second lead screw 6 that is connected to it and is vertically arranged through the coupling 4 to form a double drive device on the Z axis. The two ends of the beam 1 are respectively fixed to the first lead screw 5 and On the second lead screw 6 , the upper ends of the first lead screw 5 and the second lead screw 6 are respectively provided with a first synchronizing wheel 8 and a second synchronizing wheel 9 . The belt 10 is connected; in the above structure, the balance and stability of the beam during the up and down movement are improved, and the bearing capacity of the lead screw and the lead screw is reduced. At the same time, the driving force is provided, so a low-power motor and a low-load lead screw can be used, which can greatly reduce the cost and improve its service life, and add a synchronous belt between the two lead screws to ensure the synchronization of the two lead screws and realize dual motors. synchronous drive, so that the beam and the platform are always kept parallel.

Specifically, the upper end of the bracket is provided with a fixed seat 11 at the position corresponding to the first lead screw 5 and the second lead screw 6, and the upper ends of the first lead screw 5 and the second lead screw 6 are both rotated through the bearing and the fixed seat 11. Connection; by providing a fixed seat for fixing the lead screw on the bracket, it can ensure that the lead screw will not swing during the movement process, and can ensure that the synchronous belt is always in a state of tension, so as to ensure that the synchronization of the two lead screws remains stable and stable. Good, improve structural reliability.

In this embodiment, the bracket includes a first vertical rod 21, a second vertical rod 22 vertically disposed on both sides of the platform surface, and a cross rod 23 disposed across the top of the first vertical rod 21 and the second vertical rod 22, A frame-like structure is formed to avoid affecting the up and down movement of the beam. The first motor 2 and the second motor 3 are respectively fixed to the lower ends of the first vertical rod 21 and the second vertical rod 22 by screws. The first vertical rod 21 and the second vertical rod The upper end of the 22 is provided with a fixed seat 11, the fixed seat 11 is a right-angled shape arranged downward, wherein the right-angled side is fixed with the first vertical rod or the second vertical rod, and the other right-angled side is parallel to the platform.

Specifically, the two ends of the beam 1 are respectively connected with the screw nuts 7 on the two lead screws through the first fixing block and the second fixing block, and the beam and the two motors are located on both sides of the bracket, so as to avoid The impact makes it inconvenient to install the corresponding sprinkler mechanism and attachments on the beam.

Specifically, the first fixed block is rotatably provided with a first pulley 211 and a second pulley 212 clamped on the inner and outer sides of the first vertical rod 21 respectively, and two second pulleys 212 are arranged at an upper and lower interval. The block is rotated with a third pulley 221 and a fourth pulley 222 respectively clamped on the inner and outer sides of the second vertical rod 22, and two fourth pulleys 222 are arranged at an upper and lower interval, and the cross beam can be further improved by clamping the pulleys. The stability when moving up and down, and the use of rolling friction to reduce the friction during the up and down sliding process; in addition, in the middle of the inner and outer sides of the first vertical rod 21 and the second vertical rod 22, there are vertical guide grooves for pulley sliding 20. Guide the pulley through the guide groove, and use the guide groove to limit the pulley to prevent its position from deviating from the vertical rod.

Specifically, the first fixing block includes a first front fixing plate 24 and a first rear fixing plate 25 arranged on both sides of the bracket, and the second fixing block includes a second front fixing plate 26 and a second rear fixing plate arranged on both sides of the bracket. Plate 27, the first front fixing plate 24 and the second front fixing plate 26 are respectively fixed with the screw nuts on the two lead screws, and the two ends of the beam 1 are respectively connected with the first rear fixing plate 25 and the second rear fixing plate 27. Fixed, the first pulley 211 and the second pulley 212 are both set between the first front fixing plate 24 and the first rear fixing plate 25 through the rotating shaft, and the third pulley 221 and the fourth pulley 222 are set on the second pulley through the rotating shaft. Between the front fixing plate 26 and the second rear fixing plate 27, the fixing block and the pulley are combined to form a structure that slides and covers the vertical rod.

In this embodiment, the platform includes a bottom plate 31 and a first section bar 32 and a second section bar 33 respectively disposed on both sides of the bottom plate 31 , and the first vertical rod 21 and the second vertical rod 22 are respectively disposed on the first section bar 32 and the second section bar 33 ; In addition, the bracket and the beam are all made of profiles, and the interior is a hollow structure, which is not only light, but also has a stable structure, occupies a small space, and is easy to install and debug.

In this embodiment, a handle 28 is fixed in the middle of the upper end of the cross bar 23 by screws, so as to facilitate the lifting of the double Z-axis drive structure.

Example 2

As shown in Figures 1-8, a single-nozzle 3D printer shown in this embodiment includes the dual Z-axis drive structure shown in Embodiment 1, and also includes a nozzle mechanism 40 , which is slidably arranged on the beam for printing, and The X-axis belt conveying mechanism for driving the extruder mechanism 40 to move, the printing platform 50 slidably arranged on the base plate, and the Y-axis belt conveying mechanism for driving the printing platform 50 to move, the extruder mechanism 40 is located above the printing platform 50 .

Specifically, the X-axis belt transmission mechanism includes a third motor 41 and a tensioning adjustment mechanism that are respectively located at both ends of the beam 1 , the rotation shaft of the third motor 41 is provided with a driving wheel 411 , and the tensioning adjustment mechanism includes a fixed to the end of the beam 1 . The casing 42, the U-shaped frame 43 that slides left and right in the casing 42, the driven wheel 44 that is rotatably disposed in the U-shaped frame 43, and the adjusting screw 45 that is disposed at the end of the casing 42 and used to adjust the position of the U-shaped frame 43. There is an X-axis belt 47 between the wheel 411 and the driven wheel 44 for driving and connecting the two, and the beam is made of profiles, so that the X-axis belt can pass through the hollow part in the middle of the beam; On the beam, and the X-axis sliding assembly 46 is fixedly connected with the upper or lower belt surface of the X-axis belt, so as to drive the X-axis sliding assembly 46 and the nozzle mechanism 40 to move on the beam through the belt, and also provide adjustment screws 45 To adjust the tension of the X-axis belt, so that the X-axis belt is always in tension.

Specifically, the Y-axis belt transmission mechanism includes a sliding rail 51 arranged in the middle of the bottom plate and extending along the Y-axis, a Y-axis belt 52 that is rotated on the sliding rail 51, and a fourth motor 53 that drives the Y-axis belt 52 to move. The rail 51 is made of profile material, which is convenient for the Y-axis belt to pass through the hollow part in the middle of the beam. Belt surface fixed connection.

In other embodiments, a tension adjusting mechanism for adjusting the tension of the Y-axis belt is also provided at one end of the sliding rail.

The technical solutions provided by the embodiments of the present utility model have been described in detail above. The principles and implementations of the embodiments of the present utility model are described in this paper by using specific examples. The descriptions of the above embodiments are only suitable for helping the understanding of the present utility model. The principle of the embodiment; at the same time, for those skilled in the art, according to the embodiment of the present utility model, there will be changes in the specific implementation and application scope. Utility Model Restrictions.

Claims

A double Z-axis drive structure is characterized in that it includes a platform, a bracket arranged on the platform, and a beam that is slidably arranged on the bracket and located above the platform, and two first and second spaced apart sides of the lower end of the bracket are arranged. A motor and a second motor, the upper end of the first motor is provided with a first lead screw that is drive-connected and vertically arranged, and the upper end of the second motor is provided with a drive-connected and vertically arranged second lead screw , the two ends of the beam are respectively fixed on the first lead screw and the second lead screw through the lead screw nut, and the upper ends of the first lead screw and the second lead screw are respectively provided with a first synchronizing wheel and a second lead screw A synchronous wheel, the first synchronous wheel and the second synchronous wheel are connected by a synchronous belt.
The double Z-axis drive structure according to claim 1, wherein the upper end of the bracket is provided with a fixing seat at the position corresponding to the first lead screw and the second lead screw, and the first lead screw and the second lead screw are provided with fixed seats. The upper ends of the two lead screws are rotatably connected with the fixed seat through a bearing.
The double Z-axis drive structure according to claim 2, wherein the bracket comprises a first vertical rod and a second vertical rod vertically arranged on both sides of the platform surface respectively, and a vertical rod arranged across the first vertical rod. The bar and the cross bar at the top of the second vertical bar, the first motor and the second motor are respectively arranged at the lower ends of the first vertical bar and the second vertical bar, and the upper ends of the first vertical bar and the second vertical bar are each provided with a the fixed seat.
The dual Z-axis drive structure according to claim 3, wherein the fixed seat is a right-angle shape arranged downward, wherein a right-angle side is fixed with the first vertical rod or the second vertical rod, and the other right-angle side is fixed with the first vertical rod or the second vertical rod. The sides are parallel to the platform.
The double Z-axis drive structure according to claim 4, wherein both ends of the beam are connected to the lead screw nut through a first fixing block and a second fixing block, respectively.
The dual Z-axis drive structure according to claim 5, wherein a first pulley and a second pulley respectively clamped on the inner and outer sides of the first vertical rod are rotatably provided on the first fixed block, so The second fixed block is rotatably provided with a third pulley and a fourth pulley respectively clamped on the inner and outer sides of the second vertical rod.
The double Z-axis drive structure according to claim 6, wherein the inner and outer middles of the first vertical rod and the second vertical rod are vertically provided with guide grooves for the sliding of the pulley.
The dual Z-axis drive structure according to claim 7, wherein the first fixing block comprises a first front fixing plate and a first rear fixing plate respectively arranged on both sides of the bracket, and the second fixing block comprises a The second front fixing plate and the second rear fixing plate on both sides of the bracket, the first front fixing plate and the second front fixing plate are both fixed with the screw nut, and the two ends of the beam are respectively connected with the first rear fixing plate. The fixed plate and the second rear fixed plate are fixed, the first pulley and the second pulley are both set between the first front fixed plate and the first rear fixed plate through the rotating shaft, the third pulley and the fourth pulley They are all arranged between the second front fixing plate and the second rear fixing plate through the rotation of the rotating shaft.
The double Z-axis drive structure according to claim 8, wherein the platform comprises a bottom plate and a first profile bar and a second profile bar respectively disposed on both sides of the bottom plate, the first vertical rod and the second vertical rod are respectively provided at On the first profile material and the second profile material, a handle is arranged in the middle of the upper end of the cross bar.
A single-nozzle 3D printer, characterized in that it includes the dual Z-axis drive structure according to any one of claims 1-9, and also includes a nozzle mechanism slidably arranged on the beam and used for printing, used to drive all The X-axis belt conveyor mechanism for moving the nozzle mechanism, the printing platform slidably arranged on the bottom plate, and the Y-axis belt conveyor mechanism for driving the printing platform to move, the nozzle mechanism is located above the printing platform.