阅读说明：本技术 一种四丝杆限位调平的机械装置和3d打印机 (Mechanical device for four-screw limiting and leveling and 3D printer ) 是由 洪英盛 何桂华 耿宏伟 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种四丝杆限位调平的机械装置和3D打印机,该装置包括：打印平台、主控板和四个Z轴丝杆组件,Z轴丝杆组件包括光轴、丝杆、步进电机、上固定板、下固定板、连接板和限位开关；上固定板和下固定板在竖直方向上间隔设置,丝杆和光轴平行间隔设置,光轴的两端分别连接于上固定板和下固定板；丝杆的一端转动连接于上固定板,丝杆的另一端向下固定板延伸并且与步进电机传动连接；连接板通过丝杆螺母与丝杆传动连接；连接板包括调平部,限位开关靠近上固定板位置设置,调平部的位置与限位开关的位置对应,四个连接板分别连接于打印平台的四个角,四个调平部通过与限位开关接触以进行零点定位,以实现微调高度。(The invention discloses a mechanical device for four-screw rod limiting and leveling and a 3D printer, wherein the device comprises: the printing device comprises a printing platform, a main control board and four Z-axis lead screw components, wherein each Z-axis lead screw component comprises an optical axis, a lead screw, a stepping motor, an upper fixing plate, a lower fixing plate, a connecting plate and a limit switch; the upper fixing plate and the lower fixing plate are arranged at intervals in the vertical direction, the screw rod and the optical axis are arranged in parallel at intervals, and two ends of the optical axis are respectively connected to the upper fixing plate and the lower fixing plate; one end of the screw rod is rotatably connected to the upper fixing plate, and the other end of the screw rod extends towards the lower fixing plate and is in transmission connection with the stepping motor; the connecting plate is in transmission connection with the screw rod through a screw rod nut; the connecting plate includes leveling portion, and limit switch is close to last fixed plate position and sets up, and leveling portion's position corresponds with limit switch's position, and four connecting plates are connected respectively in four angles of print platform, and four leveling portions are through contacting in order to carry out the location of zero point with limit switch to realize the fine setting height.)

1. The utility model provides a mechanical device of spacing leveling of four lead screws for 3D printer, its characterized in that includes: the printing device comprises a printing platform, a main control board and four Z-axis lead screw components, wherein each Z-axis lead screw component comprises an optical axis, a lead screw, a stepping motor, an upper fixing plate, a lower fixing plate, a connecting plate and a limit switch; the upper fixing plate and the lower fixing plate are arranged at intervals in the vertical direction, the screw rod and the optical axis are arranged in parallel at intervals, and two ends of the optical axis are respectively connected to the upper fixing plate and the lower fixing plate; one end of the screw rod is rotatably connected to the upper fixing plate, the other end of the screw rod extends towards the lower fixing plate and is in transmission connection with a stepping motor, and the stepping motor is fixedly arranged on the lower fixing plate; the connecting plate is in transmission connection with the screw rod through a screw rod nut; the connecting plates comprise leveling parts, the limit switches are arranged close to the upper fixing plate, the leveling parts correspond to the limit switches, the four connecting plates are respectively connected to four corners of the printing platform, and the four leveling parts are in contact with the limit switches to perform zero point positioning so as to achieve fine adjustment of height; the main control board is used for controlling the printing platform to perform zero point positioning.

2. The mechanical device for limiting and leveling the four-lead screw according to claim 1, further comprising a square frame, wherein the upper fixing plate is fixedly arranged on the frame at the upper part of the square frame, and the lower fixing plate is fixedly arranged on the frame at the lower part of the square frame.

3. The mechanical device for four-lead screw limiting and leveling of claim 1, wherein the Z-axis lead screw assembly further comprises a linear bearing, the linear bearing is sleeved on the optical axis, and the linear bearing is connected with the connecting plate.

4. The mechanical device for four-lead screw limiting and leveling of claim 1, wherein the Z-axis lead screw assembly further comprises a coupler, and the stepping motor is in transmission connection with the lead screw through the coupler.

5. The mechanical device for limiting and leveling of the four-lead screw according to claim 2, wherein the square frame is made of aluminum profile.

6. The mechanical device for four-lead screw limit leveling according to claim 1, wherein the stepping motor is a 42-step motor.

7. 3D printer characterized by comprising a four lead screw limit leveling mechanism according to any of claims 1-6.

Technical Field

The invention relates to the technical field of FDM desktop 3D printers, in particular to a four-screw limiting and leveling mechanical device and a 3D printer adopting the four-screw limiting and leveling mechanical device.

Background

A 3D printer, also called a three-dimensional printer, is a machine that manufactures three-dimensional objects by printing layers of adhesive material on the basis of digital model files using special adhesive materials such as wax, powdered metal or plastic. FDM is differentiated by the way the 3D printer is molded, and is abbreviated as "Fused Deposition Modeling" to mean Fused Deposition molding. In recent years, 3D printing technology is gaining more and more favor, and the market share of FDM desktop level 3D printer is increasing due to its small size and low price.

FDM desktop level 3D printer in the market can't satisfy FDM desktop level 3D printer Z axle print platform and not only stable but also self-adjusting height compensation value at the printing in-process. The common means in the market is that the height of the Z-axis printing platform is adjusted by means of an external sensor or a manual leveling mode, so that the platform is kept horizontal relative to the XY axis, the printer cannot fall off due to the fact that the model and the platform are not firmly adhered in the model printing process, and the surface of the model generates grains due to the fact that the printing platform is unstable in structure.

Therefore, there is a need in the art for a device that can level a printing platform.

Disclosure of Invention

The invention provides a mechanical device for limiting and leveling four lead screws, and aims to solve the problems.

According to a first aspect of the embodiments of the present application, there is provided a four-lead screw spacing leveling mechanical device, including: the printing device comprises a printing platform, a main control board and four Z-axis lead screw components, wherein each Z-axis lead screw component comprises an optical axis, a lead screw, a stepping motor, an upper fixing plate, a lower fixing plate, a connecting plate and a limit switch; the upper fixing plate and the lower fixing plate are arranged at intervals in the vertical direction, the screw rod and the optical axis are arranged in parallel at intervals, and two ends of the optical axis are respectively connected to the upper fixing plate and the lower fixing plate; one end of the screw rod is rotatably connected to the upper fixing plate, the other end of the screw rod extends towards the lower fixing plate and is in transmission connection with a stepping motor, and the stepping motor is fixedly arranged on the lower fixing plate; the connecting plate is in transmission connection with the screw rod through a screw rod nut; the connecting plates comprise leveling parts, the limit switches are arranged close to the upper fixing plate, the leveling parts correspond to the limit switches, the four connecting plates are respectively connected to four corners of the printing platform, and the four leveling parts are in contact with the limit switches to perform zero point positioning so as to achieve fine adjustment of height; the main control board is used for controlling the printing platform to perform zero point positioning.

The mechanical device for limiting and leveling the four-screw rod further comprises a square frame, wherein the upper fixing plate is fixedly arranged on the frame at the upper part of the square frame, and the lower fixing plate is fixedly arranged on the frame at the lower part of the square frame.

In the mechanical device for limiting and leveling the four-screw rod, the Z-axis screw rod assembly further comprises a linear bearing, the linear bearing is sleeved on the optical axis, and the linear bearing is connected with the connecting plate.

In the mechanical device for limiting and leveling the four-screw rod, the Z-axis screw rod assembly further comprises a coupler, and the stepping motor is in transmission connection with the screw rod through the coupler.

In the mechanical device for limiting and leveling the four-screw rod, the square frame is made of aluminum profiles.

According to a second aspect of the embodiments of the present application, a 3D printer is provided, which includes the above-mentioned four-lead screw spacing and leveling mechanical device.

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application designs a mechanical device of spacing leveling of four lead screws for FDM desktop level 3D printer has realized the high self-adaptation fine setting of print platform, has further promoted the quality of printing the product, has avoided the printer to bond the obscission that produces insecurely because of model and platform at the printing model in-process to and cause the emergence of bad phenomena such as model surface production line because of the print platform structure is unstable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a four-lead screw spacing leveling mechanical device according to an embodiment of the invention;

FIG. 2 is a schematic structural view of a Z-axis screw assembly according to an embodiment of the present invention;

fig. 3 is a schematic view of a partial structure of a 3D printer according to an embodiment of the present invention.

Description of reference numerals:

10. a printing platform; 20. a Z-axis screw assembly; 21. an optical axis; 22. a screw rod; 23. a stepping motor; 24. an upper fixing plate; 25. a lower fixing plate; 26. a connecting plate; 261. a leveling section; 27. a limit switch; 28. a linear bearing; 29. a coupling; 30. a square frame; 31. an upper frame; 32. a lower frame; 33. a side frame; 40. an X-axis moving assembly; 50. a Y-axis moving assembly; 60. spout the material subassembly.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

Referring to fig. 1-3, the invention discloses a four-lead screw limiting and leveling mechanical device, which is used for a 3D printer. The device comprises a printing platform 10, a main control board (not shown in the figure) and four Z-axis lead screw assemblies 20, wherein the printing platform 10 is square, and the four Z-axis lead screw assemblies 20 are respectively arranged at four corners of the printing platform 10. The Z-axis screw assembly 20 includes an optical axis 21, a screw 22, a stepping motor 23, an upper fixing plate 24, a lower fixing plate 25, a connecting plate 26, and a limit switch 27. The upper fixing plate 24 and the lower fixing plate 25 are arranged at intervals in the vertical direction, the screw rod and the optical axis 21 are arranged between the upper fixing plate 24 and the lower fixing plate 25, and the screw rod 22 and the optical axis 21 are arranged at intervals in parallel. One end of the optical axis 21 is connected to the upper fixing plate 24, and the other end of the optical axis 21 is connected to the lower fixing plate 25; one end of the screw rod 22 is rotatably connected to the upper fixing plate 24, and the other end of the screw rod 22 faces the lower fixing plate 25 and is in transmission connection with the stepping motor 23; the stepping motor 23 is fixedly mounted on the lower fixing plate 25. The stepping motor 23 is in transmission connection with the screw rod 22, and the stepping motor 23 drives the screw rod 22 to rotate. The connecting plate 26 is in transmission connection with the lead screw 22 through the lead screw nut, namely, the lead screw rotates to drive the lead screw nut to move up and down along the lead screw 22, and the connecting plate 26 and the lead screw nut move synchronously. The connecting plate 26 comprises a leveling part 261, the position of the leveling part 261 corresponds to the position of the limit switch 27, namely, the projection of the limit switch 27 in the vertical direction is overlapped with the leveling part 261, and when the leveling part 261 moves to the position of the limit switch 27, the limit switch 27 can be touched. The limit switch 27 is disposed near the upper fixing plate 24, that is, the limit switch 27 is disposed above, and the four limit switches 27 are disposed on the same plane. The four connection plates 26 are connected to four corners of the printing platform 10, respectively, and the four leveling parts 261 perform zero point positioning by contacting with the limit switches 27, thereby achieving fine height adjustment. The main control board is used for controlling the printing platform 10 to perform zero point positioning.

When the device is used, the printing platform 10 carries out zero point positioning through the four limit switches 27, when one point of the four screw rods 22 has height deviation, the stepping motors 23 corresponding to the screw rods 22 drive the connecting plate to carry out zero point alignment and height fine adjustment on the limit switches 27 below the connecting plate, the stepping motors 23 of the four Z-axis screw rod assemblies 20 simultaneously make changes, the stepping motor 23 of the first Z-axis screw rod assembly 20 drives the screw rods to move, and the leveling part 261 of the connecting plate 26 touches the first limit switch 27 for fine adjustment; the stepping motor 23 of the second Z-axis screw rod component 20 drives the screw rod 22 to move, and the leveling part 261 of the connecting plate 26 touches the second limit switch 27 for fine adjustment; the stepping motor 23 of the third Z-axis screw rod component 20 drives the screw rod 22 to move, and the leveling part 261 of the connecting plate 26 touches the third limit switch 27 for fine adjustment; the stepping motor 23 of the fourth Z-axis screw rod assembly 20 drives the screw rod 22 to move, and the leveling part 261 of the connecting plate 26 touches the first limit switch 27 for fine adjustment; the four supporting points are adjusted to keep the level within the tolerance range, so that the printing platform 10 and the plane where the XY axes are located are in a relatively parallel position (even if the printing platform 10 is in a horizontal state), the limit switch 27 is connected with the main control board, when the printing platform 10 runs to be in contact with the limit switch 27, the printing platform 10 carries out zero point positioning, and once command is issued, an action is executed. The utility model provides a mechanical device is used for FDM desktop level 3D printer, has realized the high self-adaptation fine setting of print platform 10, has further promoted the quality of printing the product, has avoided the printer to drop because of the insecure production of model and platform bonding at the printing model in-process to and print platform structural instability causes the emergence of bad phenomena such as model surface production line.

In an alternative embodiment, the Z-axis screw assembly 20 further includes a linear bearing 28 and a coupling 29, the linear bearing 28 is aligned on the optical axis 21, and the linear bearing 28 is connected to the connecting plate 26. The linear bearings 28 are fixed to the connecting plate 26 such that the linear bearings 28 move in synchronism with the connecting plate 26. The stepping motor 23 is in transmission connection with the lead screw 22 through a coupler 29, specifically, a rotating shaft of the stepping motor 23 is in transmission connection with the lead screw 22 through the coupler 29, and the rotating shaft of the motor drives the lead screw 22 to rotate. In this embodiment, the Z-axis screw assembly 20 further includes a bearing sleeved on the upper end of the screw 22, the bearing is mounted on the upper fixing plate 24, and the screw is rotatably connected with the upper fixing plate through the bearing. In some preferred embodiments, the stepping motor 23 is a 42-step motor, which is accurate in positioning and stable in dynamic performance.

In an alternative embodiment, the present application further includes a square frame 30, an upper fixing plate 24 is mounted on the upper portion of the square frame 30, a lower fixing plate 25 is mounted on the lower portion of the square frame 30, and a limit switch 27 is mounted on the side portion of the square frame 30. Specifically, the square frame 30 includes an upper frame 31, a lower frame 32, and side frames 33, the upper frame 31 and the lower frame 32 are arranged at an upper and lower interval, the number of the side frames 33 is set to be plural, and both ends of the plural side frames are connected to the upper frame and the lower frame, respectively. An upper fixing plate 24 is fixedly arranged on the upper frame, a lower fixing plate 25 is fixedly arranged on the lower frame, and a limit switch 27 is arranged on the side frame. In some embodiments, the square frame 30 is made of aluminum.

The invention also protects a 3D printer which comprises the mechanical device for limiting and leveling the four lead screws, an X-axis moving assembly 40, a Y-axis moving assembly 50 and a material spraying assembly 60. The material spraying component 60 is in transmission connection with the X-axis moving component 40 and the Y-axis moving component 50, that is, the material spraying component 60 is driven by the X-axis moving component 40 and the Y-axis moving component 50 to move in the X-axis direction and the Y-axis direction. The X-axis moving assembly 40, the Y-axis moving assembly 50 and the material spraying assembly 60 are all arranged above the printing platform 10. The X-axis moving assembly 40, the Y-axis moving assembly 50 and the spraying assembly 60 are commonly used in the market, and are not described herein. The utility model provides a 3D printer has adopted the mechanical device of the spacing leveling of foretell four lead screws, carries out the leveling with print platform 10, has realized the high self-adaptation fine setting of print platform 10, has further promoted the quality of printing the product, has avoided the printer to produce because of model and platform bonding insecure and drop at the printing model in-process to and the print platform structure unstability causes the emergence of bad phenomena such as model surface production line.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.