CN214820893U

CN214820893U - 3D printer forming platform and Z-axis lifting mechanism thereof

Info

Publication number: CN214820893U
Application number: CN202120568830.XU
Authority: CN
Inventors: 邵中魁; 黄建军; 姜耀林
Original assignee: Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
Current assignee: Zhejiang Institute of Mechanical and Electrical Engineering Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-11-23
Anticipated expiration: 2031-03-19

Abstract

The utility model relates to a 3D printer shaping platform and Z axle elevating system thereof, it belongs to 3D and prints technical field. The utility model discloses a forming platform base, aluminium base board heating bed, heat bed platform plastics pad pasting, two ball nuts, four guiding axles and four flange linear bearing, forming platform base passes through flange linear bearing and installs about four, on the guiding axle of front and back symmetrical arrangement, forming platform base constitutes the screw nut motion pair through two ball nuts and two ball screw meshing of bilateral symmetry arrangement again simultaneously, two ball screws are connected through a pair of synchronous pulley and hold-in range, aluminium base board heating bed installs at forming platform base upper surface, heat bed platform plastics pad pasting and install at aluminium base board heating bed upper surface. The utility model discloses possess simple structure reliably, add effectual, the motion accuracy is high, transmission efficiency is high, use advantage such as maintain convenient of heating, be suitable for very much as industrial-grade high-speed 3D printer forming platform.

Description

3D printer forming platform and Z-axis lifting mechanism thereof

Technical Field

The utility model relates to a 3D printer forming platform and mechanism thereof, concretely relates to 3D printer forming platform and Z axle elevating system thereof, it belongs to 3D and prints technical field.

Background

A 3D printer, also known as additive manufacturing equipment, is one type of rapid prototyping equipment that constructs an object by printing layer-by-layer using bondable materials, such as powdered metal or plastic, based on a digital model file. According to the difference of printing mode and printing material, 3D printer can be divided into different categories. The Fused Deposition (FDM) 3D printer is the most widely used 3D printing device at present, and the main forming principle is that a nozzle is used to heat a filamentous thermoplastic material to a molten state, and then the filamentous thermoplastic material is uniformly extruded and formed on a working platform according to a predetermined track of each layer of the cross section of a part, wherein the forming platform and a Z-axis lifting mechanism thereof are one of key components for directly determining the working performance of the fused deposition 3D printer.

Most Fused Deposition (FDM) 3D printers stay at a technical stage of a desktop-level 3D printer at the present stage, and a forming platform of the FDM 3D printer has the problems of complex structure, poor quality reliability, sliding lead screw driving adopted by a Z-axis lifting driving mechanism generally, large friction resistance, low transmission efficiency, poor structural rigidity of a Z-axis lifting guide mechanism, low guide precision and the like, so that the technical requirements of high structural rigidity, high transmission precision, high transmission efficiency, stable and reliable operation, convenience in use for users and the like which are required by an industrial fused deposition 3D printer forming platform are difficult to achieve.

Therefore, the 3D printer forming platform and the Z-axis lifting mechanism thereof are simple and reliable in structure, good in heating effect, high in movement precision, high in transmission efficiency and convenient to use and maintain, so that the technical requirements of industrial 3D printers on high-speed, high-precision and high-efficiency 3D printing and forming are met, and the special requirement is particularly necessary.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the above-mentioned not enough that exists among the prior art, and provide a structural design is simple reasonable, safe and reliable, and the heating is effectual, and the motion precision is high, and transmission efficiency is high, uses and maintains convenient 3D printer shaping platform and Z axle elevating system thereof.

The utility model provides a technical scheme that above-mentioned problem adopted is: the 3D printer forming platform and the Z-axis lifting mechanism thereof comprise a speed reducer mounting bracket, a planetary gear speed reducer, a motor, a heating bed platform plastic film, an aluminum substrate heating bed and a forming platform base, wherein the motor is connected with the planetary gear speed reducer, the planetary gear speed reducer is fixed on the speed reducer mounting bracket, and the speed reducer mounting bracket is fixed on the first upper flat plate; the aluminum substrate heating bed is arranged on the forming platform base, the plastic film of the heating bed platform is arranged on the aluminum substrate heating bed, and the aluminum substrate heating bed further comprises a first lower flat plate, a first ball screw, a first guide shaft, a first upper flat plate, a second guide shaft, a second upper flat plate, a second ball screw, a third guide shaft, a second lower flat plate and a fourth guide shaft, wherein the first guide shaft and the fourth guide shaft are arranged between the first upper flat plate and the first lower flat plate; the second guide shaft and the third guide shaft are arranged between the second upper flat plate and the second lower flat plate; the ball screw I and the ball screw II are arranged in a bilateral symmetry mode, the upper end of the ball screw I is connected with the upper flat plate I, and the lower end of the ball screw I is connected with the lower flat plate I; the upper end of the second ball screw is connected with the second upper flat plate, and the lower end of the second ball screw is connected with the second lower flat plate; and the lower ends of the first ball screw and the second ball screw are respectively provided with a first synchronous pulley and a second synchronous pulley which are connected.

Preferably, the utility model also comprises a first lead screw supporting seat, a second lead screw supporting seat, a third lead screw supporting seat and a fourth lead screw supporting seat, wherein the upper end of the first ball screw is fixed on the first upper flat plate through the first lead screw supporting seat, and the lower end of the first ball screw is fixed on the first lower flat plate through the fourth lead screw supporting seat; the upper end of the second ball screw is fixed on the second upper flat plate through the second screw support seat, and the lower end of the second ball screw is fixed on the second lower flat plate through the third screw support seat.

Preferably, the guide shaft I, the guide shaft IV, the guide shaft II and the guide shaft III are symmetrically arranged around and parallel to each other.

Preferably, the utility model discloses still include ball nut one and ball nut two, the motor passes through planetary gear reducer drive ball screw one and two synchronous positive and negative rotations of ball screw, and ball screw one and ball screw two respectively drive ball nut one and ball nut two and do linear motion from top to bottom.

Preferably, the plastic film of the hot bed platform of the utility model is in a rectangular or round thin sheet structure; the aluminum substrate heating bed is in a rectangular or round thin plate structure.

Preferably, the motor adopts servo motor or step motor.

Compared with the prior art, the utility model, have following advantage and effect: 1) the whole structure is simple and reasonable in design, the forming platform transmission system is driven by four guide shafts and double ball screws, the structure is good in rigidity, high in movement precision, high in transmission efficiency and stable and reliable in operation; 2) the forming platform is simple and reliable in structure, good in heating effect, capable of effectively reducing warping deformation of formed parts, and convenient to use and maintain, and only a new plastic film of the hot bed platform needs to be directly replaced after printing operation is completed every time.

Drawings

Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.

In the figure: the device comprises a synchronous pulley I1, a lower flat plate I2, a ball screw I3, a ball nut I4, a flange linear bearing I5, a guide shaft I6, a screw support seat I7, an elastic coupling 8, an upper flat plate I9, a speed reducer mounting bracket 10, a planetary gear speed reducer 11, a motor 12, a hot bed platform plastic film 13, an aluminum substrate heating bed 14, a forming platform base 15, a flange linear bearing II 16, a guide shaft II 17, a screw support seat II 18, an upper flat plate II 19, a ball screw II 20, a guide shaft III 21, a ball nut II 22, a flange linear bearing III 23, a synchronous pulley II 24, a lower flat plate II 25, a screw support seat III 26, a synchronous belt 27, a flange linear bearing IV 28, a guide shaft IV 29 and a screw support seat IV 30.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1, the 3D printer forming platform and the Z-axis lifting mechanism thereof in this embodiment mainly include a first synchronous pulley 1, a first lower flat plate 2, a first ball screw 3, a first guide shaft 6, a first upper flat plate 9, a reducer mounting bracket 10, a planetary gear reducer 11, a motor 12, a plastic film 13 of a heat bed platform, a heating bed 14 of an aluminum substrate, a forming platform base 15, a second guide shaft 17, a second upper flat plate 19, a second ball screw 20, a third guide shaft 21, a second synchronous pulley 24, a second lower flat plate 25, and a fourth guide shaft 29.

In the embodiment, the first upper flat plate 9 and the second upper flat plate 19 are respectively and horizontally installed and fixed at the top of the 3D printer frame, and the first lower flat plate 2 and the second lower flat plate 25 are respectively and horizontally installed and fixed at the bottom of the 3D printer frame; the first guide shaft 6 and the fourth guide shaft 29 are vertically arranged and fixed between the first upper flat plate 9 and the first lower flat plate 2 respectively, and the second guide shaft 17 and the third guide shaft 21 are vertically arranged and fixed between the second upper flat plate 19 and the second lower flat plate 25 respectively.

The upper end of a guide shaft I6 of the embodiment is fixedly arranged on an upper flat plate I9 through a guide shaft support; the lower end of the guide shaft I6 is fixedly arranged on the lower flat plate I2 through a guide shaft support; the upper end of the guide shaft IV 29 is fixedly arranged on the upper flat plate I9 through a guide shaft support; the lower end of the guide shaft IV 29 is fixedly arranged on the lower flat plate I2 through a guide shaft support; the upper end of the second guide shaft 17 is fixedly arranged on the second upper flat plate 19 through a guide shaft support; the lower end of the second guide shaft 17 is fixedly arranged on the second lower flat plate 25 through a guide shaft support; the upper end of the third guide shaft 21 is fixedly arranged on the second upper flat plate 19 through a guide shaft support; the lower end of the guide shaft III 21 is fixedly arranged on the lower flat plate 25 through a guide shaft support.

In the embodiment, the first guide shaft 6, the fourth guide shaft 29, the second guide shaft 17 and the third guide shaft 21 are symmetrically arranged left and right, front and back and parallel to each other.

In the embodiment, a first ball screw 3 is vertically arranged and fixed between a first upper flat plate 9 and a first lower flat plate 2, a second ball screw 20 is vertically arranged and fixed between a second upper flat plate 19 and a second lower flat plate 25, the upper end of the first ball screw 3 is fixed on the first upper flat plate 9 through a first screw support seat 7, and the lower end of the first ball screw 3 is fixed on the first lower flat plate 2 through a fourth screw support seat 30; the upper end of the second ball screw 20 is fixed on the second upper flat plate 19 through the second screw support seat 18, and the lower end of the second ball screw 20 is fixed on the second lower flat plate 25 through the third screw support seat 26.

In the embodiment, the first ball screw 3 and the second ball screw 20 are arranged in bilateral symmetry and are parallel to the first guide shaft 6, the fourth guide shaft 29, the second guide shaft 17 and the third guide shaft 21; the lower end of the first ball screw 3 is fixedly provided with a first synchronous pulley 1, the lower end of the second ball screw 20 is fixedly provided with a second synchronous pulley 24, and the first synchronous pulley 1 is connected with the second synchronous pulley 24 through a synchronous belt 27, so that the first ball screw 3 and the second ball screw 20 can only synchronously rotate in the radial direction.

In this embodiment, a servo motor or a stepping motor is adopted as a motor 12, the motor 12 is fixedly installed at an input end of a planetary gear reducer 11, an output shaft of the motor 12 is fixedly connected with an input shaft of the planetary gear reducer 11, the planetary gear reducer 11 is fixedly installed on a reducer installing support 10, the reducer installing support 10 is fixedly installed on the upper surface of an upper flat plate 9, and an output shaft of the planetary gear reducer 11 is fixedly connected with the upper end of a ball screw 3 through an elastic coupling 8.

The four corners of the forming platform base 15 of this embodiment are respectively fixed with a first flange linear bearing 5, a fourth flange linear bearing 28, a second flange linear bearing 16 and a third flange linear bearing 23, which are symmetrically arranged left and right and back, and the first flange linear bearing 5, the fourth flange linear bearing 28, the second flange linear bearing 16 and the third flange linear bearing 23 are respectively installed on the corresponding first guide shaft 6, the fourth guide shaft 29, the second guide shaft 17 and the third guide shaft 21 and are matched with the first guide shaft, the fourth guide shaft 28, the second flange linear bearing 16 and the third guide shaft to form a linear guide kinematic pair, so that the forming platform base 15 can only do vertical linear motion.

The ball nuts one 4 and the ball nuts two 22 which are arranged in bilateral symmetry are respectively installed and fixed on the left side and the right side of the forming platform base 15, and the ball nuts one 4 and the ball nuts two 22 are respectively installed on the corresponding ball screws one 3 and the ball screws two 20 and are meshed with the ball screws to form a screw nut kinematic pair.

The aluminum substrate heating bed 14 in this embodiment is a rectangular or circular thin plate structure, which takes an aluminum alloy thin plate as a substrate and uniformly arranges and installs heating resistance wires on the upper surface or the lower surface, and the aluminum substrate heating bed 14 is horizontally installed and fixed on the upper surface of the forming platform base 15; the plastic film 13 of the hot bed platform is of a rectangular or round sheet structure, and the plastic film 13 of the hot bed platform is horizontally installed and fixed on the upper surface of the heating bed 14 of the aluminum substrate in an adhesive or magnetic suction mode to serve as a 3D printing forming working surface.

The utility model discloses a theory of operation does: 3D prints the shower nozzle and will be at the direct fused deposition shaping of hot bed platform plastics pad pasting 13 upper surface, aluminium base board heating bed 14 can be with the shaping platform even heating to the settlement temperature and last heat preservation, it can directly to change a new hot bed platform plastics pad pasting 13 after printing the completion, in addition in shaping platform Z axle elevating movement aspect, motor 12 drives ball screw one 3 and ball screw two 20 synchronous positive and negative rotations through planetary gear reducer 11, ball screw one 3 and ball screw two 20 then drive ball nut one 4 and ball nut two 22 respectively and do linear motion from top to bottom, thereby realize 3D printer shaping platform Z axle elevating movement.

The forming platform transmission system of the embodiment adopts four guide shafts for guiding and double-ball screw driving, and has the advantages of good structural rigidity, high motion precision, high transmission efficiency and stable and reliable operation.

The forming platform of the embodiment adopts the aluminum substrate heating bed 14 as a heating device and lays the layer of the plastic film 13 of the hot bed platform on the aluminum substrate heating bed as the surface of the forming platform, has simple and reliable structure and good heating effect, can effectively reduce the warping deformation of formed parts, and is convenient to use and maintain only by directly replacing a new plastic film 13 of the hot bed platform after the printing operation is completed every time.

To sum up, this embodiment possesses simple structure reliably, heats effectual, motion accuracy height, transmission efficiency height, use advantage such as maintain convenient, is particularly suitable for as industrial grade high-speed 3D printer forming platform.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. A3D printer forming platform and a Z-axis lifting mechanism thereof comprise a speed reducer mounting support (10), a planetary gear speed reducer (11), a motor (12), a heating bed platform plastic film (13), an aluminum substrate heating bed (14) and a forming platform base (15), wherein the motor (12) is connected with the planetary gear speed reducer (11), the planetary gear speed reducer (11) is fixed on the speed reducer mounting support (10), and the speed reducer mounting support (10) is fixed on an upper flat plate I (9); the aluminum substrate heating bed (14) is arranged on the forming platform base (15), the heating bed platform plastic film (13) is arranged on the aluminum substrate heating bed (14), the aluminum substrate heating bed further comprises a first lower flat plate (2), a first ball screw (3), a first guide shaft (6), a first upper flat plate (9), a second guide shaft (17), a second upper flat plate (19), a second ball screw (20), a third guide shaft (21), a second lower flat plate (25) and a fourth guide shaft (29), and the first guide shaft (6) and the fourth guide shaft (29) are arranged between the first upper flat plate (9) and the first lower flat plate (2); the second guide shaft (17) and the third guide shaft (21) are arranged between the second upper flat plate (19) and the second lower flat plate (25); the ball screw I (3) and the ball screw II (20) are arranged in bilateral symmetry, the upper end of the ball screw I (3) is connected with the upper flat plate I (9), and the lower end of the ball screw I (3) is connected with the lower flat plate I (2); the upper end of the second ball screw (20) is connected with the second upper flat plate (19), and the lower end of the second ball screw (20) is connected with the second lower flat plate (25); the lower ends of the first ball screw (3) and the second ball screw (20) are respectively provided with a first synchronous pulley (1) and a second synchronous pulley (24).

2. The 3D printer forming platform and the Z-axis lifting mechanism thereof according to claim 1, characterized in that: the upper end of the first ball screw (3) is fixed on the first upper flat plate (9) through the first screw support seat (7), and the lower end of the first ball screw (3) is fixed on the first lower flat plate (2) through the fourth screw support seat (30); the upper end of the second ball screw (20) is fixed on the second upper flat plate (19) through a second screw support seat (18), and the lower end of the second ball screw (20) is fixed on the second lower flat plate (25) through a third screw support seat (26).

3. The 3D printer forming platform and the Z-axis lifting mechanism thereof according to claim 1, characterized in that: the first guide shaft (6), the fourth guide shaft (29), the second guide shaft (17) and the third guide shaft (21) are symmetrically arranged left and right, front and back and are parallel to each other.

4. The 3D printer forming platform and the Z-axis lifting mechanism thereof according to claim 1, characterized in that: the synchronous positive and negative rotation of the ball screw I (3) and the ball screw II (20) is driven by the motor (12) through the planetary gear reducer (11), and the ball screw I (3) and the ball screw II (20) respectively drive the ball screw I (4) and the ball screw II (22) to do vertical linear motion.

5. The 3D printer forming platform and the Z-axis lifting mechanism thereof according to claim 1, characterized in that: the plastic film (13) of the hot bed platform is in a rectangular or round sheet structure; the aluminum substrate heating bed (14) is in a rectangular or round thin plate structure.

6. The 3D printer forming platform and the Z-axis lifting mechanism thereof according to claim 1, characterized in that: the motor (12) adopts a servo motor or a stepping motor.