CN214645897U

CN214645897U - 3D printer charging tray installation and guiding mechanism

Info

Publication number: CN214645897U
Application number: CN202022568050.3U
Authority: CN
Inventors: 邵中魁; 黄建军; 何朝辉; 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: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-11-09
Anticipated expiration: 2030-11-09

Abstract

The utility model relates to a 3D printer charging tray installation and guiding mechanism, it belongs to 3D and prints technical field. The utility model comprises a reference flat plate, a fixed shaft, a material tray, a guide bracket, a rolling shaft, a conical cover, a throat pipe, a pneumatic quick coupling and a feeding pipe, wherein one end of the fixed shaft is arranged on the reference flat plate, the material tray is movably connected with the fixed shaft, the guide bracket is fixed on the reference flat plate, the rolling shaft is arranged and positioned on the fixed shaft, the material tray is matched with the rolling shaft, and the conical cover is connected with the rolling shaft; the choke is installed on the guide bracket, and pneumatic quick-operation joint sets up with this choke is coaxial, and conveying pipe one end is fixed on pneumatic quick-operation joint. The utility model discloses rational in infrastructure, rotatory feed frictional resistance is little, charging tray installation automatic centering, material accessory installation change convenience, the accurate adjustable of feed direction.

Description

3D printer charging tray installation and guiding mechanism

Technical Field

The utility model relates to an installation and guiding mechanism especially relate to a 3D printer charging tray installation and guiding mechanism, 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 main forming principle of the Fused Deposition (FDM) 3D printer is that a filament-like thermoplastic material is conveyed to a nozzle by a wire feeding mechanism and heated to a molten state, and then uniformly extruded and formed on a working platform according to a predetermined track of each layer of the cross section of the part. It follows that the wire feeder is an important component of a fused deposition 3D printer.

At present, 3D printing industry is universal, 3D printing wires are wound and installed on a circular material tray, the material tray is simply installed and placed on a shaft, one end of each wire is installed in a 3D printing nozzle, a wire feeding mechanism pulls the wires to be conveyed towards the direction of the nozzle when the 3D printing is formed, and the material tray freely rotates along with the wire feeding mechanism. However, the traditional tray installation mode has the defects of poor positioning accuracy, large feeding resistance, lack of an accurate feeding guide mechanism and the like, so that the working performance of the wire feeding mechanism of the 3D printer is reduced to a certain extent, and the technical requirements of the industrial 3D printer on the stability, the accuracy and the like of the feeding mechanism in the high-speed printing and forming process cannot be met.

A chinese patent publication No. CN109228347A, published as 2019, month 01 and 18, discloses a utility model named "intelligent 3D printer". The patent material tray is arranged above the top plate and is connected with the printing unit through a wire feeding pipe; the material disc mounting mode has the defects of poor positioning precision, large feeding resistance, lack of a precise feeding guide mechanism and the like, so the material disc mounting mode also has the defects.

Therefore, it is especially necessary to develop a 3D printer tray installation and guide mechanism with high tray positioning accuracy, small feeding resistance, accurate and adjustable feeding direction, and convenient installation and maintenance, so as to meet the technical requirements of industrial 3D printers for high-speed, stable and accurate feeding.

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 rotatory feed frictional resistance is little, and charging tray installation automatic centering, material accessory installation change convenience, the accurate adjustable 3D printer charging tray of feed direction installation and guiding mechanism.

The utility model provides a technical scheme that above-mentioned problem adopted is: this 3D printer charging tray installation and guiding mechanism, including benchmark flat board, fixed axle and charging tray, fixed axle one end is installed on the benchmark flat board, and the charging tray links to each other its characterized in that with the fixed axle activity: the device comprises a base plate, a bearing I, a roller, a conical cover, a bearing II, a throat pipe, a pneumatic quick connector and a feeding pipe, wherein the base plate is fixed on the base plate; the material tray is matched with the rolling shaft, and the conical cover is connected with the rolling shaft; the choke is installed on the guide bracket, and pneumatic quick-operation joint sets up with this choke is coaxial, and conveying pipe one end is fixed on pneumatic quick-operation joint.

As preferred, roller bearing outer cylindrical surface one end is provided with indent toper face of cylinder structure, and the other end is provided with the external screw thread.

Preferably, the bearing outer rings of the bearing I and the bearing II are respectively matched and fixed with the step holes at the two ends of the corresponding rolling shaft; the bearing inner rings of the bearing I and the bearing II are respectively matched and fixed with the fixed shaft; the rolling shaft is connected and fixed with the bearing I and the bearing II to form an integral part; the whole part of the rolling shaft is arranged and positioned at the other end of the fixed shaft through the first bearing and the second bearing, and the rolling shaft can only do radial rotation motion around the fixed shaft.

As preferred, the last screw thread through-hole that has opened of guide bracket, the choke is hollow cylinder pipe, and this outer face of cylinder one end of choke is provided with the external screw thread, and the choke passes through threaded connection in guide bracket's screw thread through-hole one end.

Preferably, pneumatic quick-operation joint adopts threaded connection at the screw thread through-hole other end of guide bracket, and pneumatic quick-operation joint and choke coaxial arrangement.

As preferred, the conveying pipe is the same with the choke aperture for hollow long cylinder pipe and central aperture, and this conveying pipe one end is installed on pneumatic quick-operation joint and its terminal surface closely laminates with choke one terminal surface, and the conveying pipe other end is used for printing the shower nozzle with outside 3D and is connected.

As preferred, the inside central through-hole of charging tray embolias the roller bearing and makes charging tray one end side closely laminate with roller bearing indent toper face of cylinder structure.

Preferably, the conical cover thread inner hole of the utility model is screwed into the roller external thread until the conical cylindrical surface of the conical cover is tightly attached to the side surface of the other end of the material tray and the material tray is axially pressed firmly and fixed; the charging tray, the rolling shaft and the conical cover are connected and fixed into an integral part, and the charging tray can only do radial rotation motion around the fixed shaft.

Preferably, fixed axle one end adopts threaded connection to install on the benchmark is dull and stereotyped.

Preferably, the first bearing and the second bearing adopt a deep groove ball bearing or a tapered roller bearing.

Compared with the prior art, the utility model, have following advantage and effect: (1) the whole structure is simple and reasonable in design, safe and reliable, and the rolling shaft is arranged and positioned on the fixed shaft through a pair of bearings (a bearing I and a bearing II), so that the friction resistance of the material plate in rotating and feeding is greatly reduced; (2) the charging tray is installed and positioned by adopting a pair of conical cylindrical surfaces of a rolling shaft and a conical cover, and has the function of automatic centering during charging tray installation; (3) when the material tray is replaced, only the conical cover part needs to be quickly detached, and when wires with different diameters are replaced, the adaptive throat pipe and the feeding pipe can be quickly detached and replaced, so that the material accessories are convenient to install and replace; (4) when the feeding direction needs to be adjusted, the feeding direction of the material tray can be accurately adjusted only by adjusting the installation position and the direction of the guide support.

Drawings

Fig. 1 is the utility model discloses embodiment 3D printer charging tray installation and guiding mechanism's sectional structure schematic diagram.

Fig. 2 is the utility model discloses a structural schematic is surveyed to 3D printer charging tray installation and guiding mechanism axle.

In the figure: the device comprises a reference flat plate 1, a guide support 2, a fixed shaft 3, a first bearing 4, a rolling shaft 5, a material tray 6, a conical cover 7, a second bearing 8, a throat pipe 9, a pneumatic quick coupling 10 and a feeding pipe 11.

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

Referring to fig. 1 to 2, the tray mounting and guiding mechanism of the 3D printer of the embodiment includes a reference flat plate 1, a guiding support 2, a fixed shaft 3, a first bearing 4, a roller 5, a tray 6, a conical cover 7, a second bearing 8, a throat pipe 9, a pneumatic quick coupling 10, and a feeding pipe 11.

One end of the fixed shaft 3 is arranged on the reference flat plate 1 in a threaded connection mode; the center of the roller 5 is of an internal hollow structure, and step holes are respectively processed at the center positions of two ends of the roller 5.

In the embodiment, the first bearing 4 and the second bearing 8 adopt deep groove ball bearings or tapered roller bearings, the first bearing 4 and the second bearing 8 are respectively embedded in step holes at two ends of the roller 5, and outer rings of the first bearing 4 and the second bearing 8 are respectively matched and fixed with the step holes at two ends of the corresponding roller 5, so that the roller 5, the first bearing 4 and the second bearing 8 are connected and fixed into an integral part; meanwhile, two bearing inner rings of the first bearing 4 and the second bearing 8 are respectively matched and fixed with the fixed shaft 3, so that the whole part of the roller 5 is arranged and positioned at the other end of the fixed shaft 3 through the first bearing 4 and the second bearing 8, and the roller 5 can only do radial rotary motion around the fixed shaft 3; an inner concave conical cylindrical surface structure is processed at one end of the outer cylindrical surface of the rolling shaft 5, and an external thread is processed at the other end of the rolling shaft.

In the embodiment, a threaded through hole is processed in the center of the inner part of the conical cover 7, and the outer circle of the conical cover 7 is a conical cylindrical surface; the roller 5 is sleeved in the central through hole in the charging tray 6, the side face of one end of the charging tray 6 is tightly attached to the concave conical cylindrical surface structure of the roller 5, the threaded inner hole of the conical cover 7 is screwed into the external thread of the roller 5 until the conical cylindrical surface of the conical cover 7 is tightly attached to the side face of the other end of the charging tray 6, the charging tray 6 is axially pressed and fixed, the charging tray 6 is fixedly connected with the roller 5 and the conical cover 7 to form an integral part, and the charging tray 6 can only rotate around the fixed shaft 3 in the radial direction.

In the embodiment, a guide bracket 2 is fixed on a reference flat plate 1, and a threaded through hole is formed in the guide bracket 2; the hollow cylindrical pipe 9 is a hollow cylindrical pipe, the center of the hollow cylindrical pipe 9 is a circular through hole, the aperture of the hollow cylindrical pipe 9 is designed to be 0.5mm-1mm larger than the outer diameter of a 3D printing wire material for forming, both ends of the circular through hole in the center of the hollow cylindrical pipe 9 are chamfered, external threads are processed at one end of the outer cylindrical surface of the hollow cylindrical pipe 9, the hollow cylindrical pipe 9 is installed and fixed at one end of a threaded through hole of the guide support 2 in a threaded connection mode, the pneumatic quick connector 10 is also fixed at the other end of the threaded through hole of the guide support 2 in a threaded connection mode, and the pneumatic quick connector 10 and the hollow cylindrical pipe 9 are ensured to be coaxially installed; the feeding pipe 11 is a hollow long cylindrical pipe, the central aperture of the feeding pipe is the same as that of the throat pipe 9, one end of the feeding pipe 11 is fixedly installed on the pneumatic quick connector 10, the end face of the feeding pipe is tightly attached to one end face of the throat pipe 9, and the other end of the feeding pipe 11 is used for being connected with the 3D printing nozzle.

The working principle of the embodiment is as follows: during operation, only need can realize charging tray 6 and install and change fast through manual installation or dismantlement awl lid 7, 3D printing silk material on charging tray 6 passes choke 9 and conveying pipe 11 in proper order and carries 3D and prints the shower nozzle to 3D printing silk material will stimulate charging tray 6 and around fixed axle 3 free rotation and carry the silk material to 3D continuously and print the shower nozzle under shower nozzle pay-off motor drive, thereby realize charging tray 6 installation and pay-off direction function.

In the embodiment, the roller 5 is arranged and positioned on the fixed shaft 3 through a pair of bearings (a bearing I4 and a bearing II 8), so that the rotating feeding friction resistance of the material tray 6 is greatly reduced, and the improvement of the feeding process stability of the wire feeding mechanism of the 3D printer is facilitated; and the charging tray 6 adopts a pair of conical cylindrical surfaces of the rolling shaft 5 and the conical cover 7 for installation and positioning, has the function of automatic centering of the charging tray 6 for installation, and well ensures the installation and positioning accuracy of the charging tray 6.

In the implementation, when the charging tray 6 is replaced, only the parts of the conical cover 7 need to be quickly disassembled, and when wires with different diameters are replaced, the adaptive throat pipe 9 and the feeding pipe 11 can be quickly disassembled and replaced, so that the material accessories are convenient to install and replace; when the feeding direction needs to be adjusted, the feeding direction of the material tray 6 can be accurately adjusted only by adjusting the installation position and the direction of the guide support 2.

In conclusion, the present embodiment has the advantages of small friction resistance in rotation feeding, automatic centering in installation of the material tray 6, convenient installation and replacement of material accessories, accurate and adjustable feeding direction, and the like, and is very suitable for being used as an installation and guide mechanism for the material tray 6 of the industrial-grade high-speed 3D printer.

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. The utility model provides a 3D printer charging tray installation and guiding mechanism, includes benchmark flat board (1), fixed axle (3) and charging tray (6), fixed axle (3) one end is installed on benchmark flat board (1), and charging tray (6) link to each other its characterized in that with fixed axle (3) activity: the device is characterized by further comprising a guide support (2), a roller (5), a conical cover (7), a throat pipe (9), a pneumatic quick joint (10) and a feeding pipe (11), wherein the guide support (2) is fixed on a reference flat plate (1), the roller (5) is installed and positioned on a fixed shaft (3), a material tray (6) is matched with the roller (5), and the conical cover (7) is connected with the roller (5); the throat (9) is installed on the guide support (2), the pneumatic quick connector (10) and the throat (9) are coaxially arranged, and one end of the feeding pipe (11) is fixed on the pneumatic quick connector (10).

2. The 3D printer tray mounting and guiding mechanism of claim 1, characterized in that: the center of the rolling shaft (5) is of an internal hollow structure, and the center positions of two ends of the rolling shaft (5) are respectively provided with a step hole; one end of the outer cylindrical surface of the rolling shaft (5) is provided with an inwards concave conical cylindrical surface structure, and the other end of the outwards concave conical cylindrical surface structure is provided with an external thread.

3. The 3D printer tray mounting and guiding mechanism of claim 2, characterized in that: the roller bearing is characterized by further comprising a first bearing (4) and a second bearing (8), wherein the first bearing (4) and the second bearing (8) are respectively installed in step holes in two ends of the roller (5) in an embedded mode.

4. The 3D printer tray installation and guide mechanism of claim 3, characterized in that: the bearing outer rings of the bearing I (4) and the bearing II (8) are respectively matched and fixed with step holes at two ends of the corresponding rolling shaft (5); the bearing inner rings of the bearing I (4) and the bearing II (8) are respectively matched and fixed with the fixed shaft (3).

5. The 3D printer tray mounting and guiding mechanism of claim 1, characterized in that: a threaded through hole is formed in the guide support (2), the throat (9) is a hollow cylindrical pipe, an external thread is arranged at one end of the outer cylindrical surface of the throat (9), and the throat (9) is connected to one end of the threaded through hole of the guide support (2) through a thread.

6. The 3D printer tray installation and guide mechanism of claim 5, characterized in that: the pneumatic quick connector (10) is connected to the other end of the threaded through hole of the guide support (2) through threads, and the pneumatic quick connector (10) and the throat pipe (9) are coaxially installed.

7. The 3D printer tray mounting and guiding mechanism of claim 1, characterized in that: the feeding pipe (11) is a hollow long cylindrical pipe, the central aperture of the feeding pipe is the same as that of the throat pipe (9), one end of the feeding pipe (11) is installed on the pneumatic quick connector (10), and the end face of the feeding pipe is tightly attached to one end face of the throat pipe (9).

8. The 3D printer tray installation and guide mechanism of claim 3, characterized in that: the first bearing (4) and the second bearing (8) adopt deep groove ball bearings or tapered roller bearings.