CN206749066U - A kind of 3D printer servicing unit used under microgravity environment - Google Patents

Abstract

The utility model discloses a 3D printer auxiliary device used in a microgravity environment, comprising a base provided with a bearing frame, a rotating beam with a 3D printer fixed box installed at the free end, and a driver installed on the base for driving the rotating beam to rotate. Mechanism; Compared with the prior art, the beneficial effect of the utility model is: the utility model installs the 3D printer in the special 3D printer fixed box, and relies on the rotation of the motor to drive the rotating beam to rotate horizontally, so as to produce a Gravity, suitable for 3D printing operations in microgravity environment, especially space environment, with simple structure and strong practicability.

Description

A 3D printer auxiliary device used in a microgravity environment

technical field

The utility model relates to the technical field of 3D printing, in particular to a 3D printer auxiliary device used in a microgravity environment.

Background technique

3D printing technology is based on the computer three-dimensional design model, through the software layered discrete and numerical control forming system, the metal powder, ceramic powder, plastic, cell tissue and other special materials are accumulated and bonded layer by layer by means of laser beams and hot melt nozzles Knots, and finally superimposed molding to create a physical product.

3D printing technology is especially suitable for agile manufacturing. For example, the special 3D printers used by the US Army can quickly manufacture damaged weapons and equipment on the battlefield. In the manpower aerospace industry, especially for large-scale equipment such as spacecraft and space stations operating in space, it is composed of tens of thousands of parts and components. Generally, it is necessary to carry a large number of spare parts, which takes up valuable space on the spacecraft. And if the spacecraft and space station are equipped with 3D printers, and the 3D model of the equipment is stored in the computer, when the equipment is damaged and needs to be replaced, the 3D printer can be used for rapid manufacturing, which can avoid carrying a large number of spare parts and occupying the space of the spacecraft.

Existing 3D printers are all designed to be used in the earth's environment, and the microgravity environment in space requires devices that generate gravity similar to the earth's gravity for printing.

Utility model content

The purpose of this utility model is to provide a 3D printer auxiliary device used in a microgravity environment. The 3D printer is installed in a special 3D printer fixed box, and the rotation of the motor drives the rotating beam to rotate horizontally to achieve gravity similar to the earth. It is suitable for 3D printing operations in a microgravity environment, especially in a space environment, and has a simple structure and strong practicability.

The utility model is realized through the following technical solutions: a 3D printer auxiliary device used in a microgravity environment, including a base provided with a bearing frame, a rotating beam with a 3D printer fixed box installed on the free end, and a driving beam installed on the base for driving The drive mechanism for turning the crossbeam.

In the utility model, the driving mechanism will drive the rotating beam to rotate, so that the 3D printer fixed box connected to the free end of the rotating beam will perform centrifugal movement, and the 3D printer fixed box will gradually change from a vertical state to a horizontal state. With the increase of the speed of the driving mechanism , the centrifugal force acts on the 3D printer in the 3D printer fixing box 5, and the centrifugal force is used to simulate the gravity of the earth so that the 3D printer can print in a microgravity environment.

Further, in order to better realize the utility model, the driving mechanism includes a driving motor installed on the base and a power shaft connected to the rotating beam, and the driving motor is connected to the power shaft through a belt transmission system.

Further, in order to better realize the utility model, the power shaft is connected to the rotating beam through a spline.

Further, in order to better realize the utility model, the drive mechanism also includes a first bearing fitted with the end of the power shaft away from the rotating beam and a second bearing fitted with the end of the power shaft close to the rotating beam; the first The bearing and the second bearing are installed on the bearing frame respectively.

Further, in order to better realize the utility model, the first bearing is a thrust bearing, and the second bearing is a tapered roller bearing. Using reasoning bearing as the first bearing can effectively bear axial force, and using tapered roller bearing can effectively bear radial force.

Further, in order to better realize the utility model, the base is provided with a U-shaped chute, and the bottom of the driving motor is slidably installed on the U-shaped chute. It can effectively adjust the position of the driving motor, and then effectively adjust the tightness of the transmission belt.

Further, in order to better realize the utility model, the free end of the rotating beam is provided with a rotating shaft, and the fixed box of the 3D printer is connected with the rotating beam through the rotating shaft.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

(1) The utility model uses the transmission belt to output the rotation output by the motor to the power shaft, and drives the rotating beam to rotate, with a simple structure;

(2) There is a U-shaped groove on the base of the utility model, which can effectively adjust the position of the driving motor, and then effectively adjust the tightness of the transmission belt;

(3) The utility model adopts the reasoning bearing as the first bearing to effectively bear the axial force, and adopts the tapered roller bearing to effectively bear the radial force;

(4) The utility model has simple structure and strong practicability.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is the top view of the utility model;

Fig. 3 is the top view of the utility model when four 3D printer fixed boxes are arranged;

Among them, 1-base, 2-bearing frame, 3-first bearing, 4-second bearing, 5-3D printer fixed box, 6-rotating shaft, 10-driving mechanism, 101-driving motor, 12-rotating beam, 13- power shaft.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", Orientation indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation , so it cannot be interpreted as a limitation of the present utility model.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

The utility model will be further described in detail below in conjunction with the examples, but the implementation of the utility model is not limited thereto.

Example 1:

This embodiment is further optimized on the basis of the above embodiments. As shown in Fig. 1, Fig. 2 and Fig. 3, a 3D printer auxiliary device used in a microgravity environment includes a base 1 provided with a bearing frame 2, a free The rotating beam 12 of the 3D printer fixed box 5 and the driving mechanism 10 installed on the base 1 for driving the rotating beam 12 are installed at the end.

It should be noted that, through the above improvements, the driving mechanism 10 will drive the rotating beam 12 to rotate, so that the 3D printer fixed box 5 connected to the free end of the rotating beam 12 will perform centrifugal movement, and the 3D printer fixed box 5 will gradually change from a vertical state to a vertical state. In the horizontal state, as the rotation speed of the driving mechanism 10 increases, the centrifugal force acts on the 3D printer in the 3D printer fixing box 55, and the centrifugal force is used to simulate the gravity of the earth so that the 3D printer can print in a microgravity environment.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Example 2:

This embodiment is further optimized on the basis of the above-mentioned embodiments. As shown in FIG. 101 is connected to the power shaft 13 through a belt drive system.

It should be noted that, through the above improvements, the output shaft of the driving motor 101 is connected to the belt, and the other section of the belt is connected to the power shaft 13. When the output shaft of the driving motor 101 rotates, the power shaft 13 is driven by the belt to rotate. In this way, the rotating beam 12 connected to the power shaft 13 can be rotated in a circle along the connection point between the power shaft 13 and the rotating beam 12 .

The connection mode between the power shaft 13 and the rotating crossbeam 12 can adopt a kind of sliding connection or key connection.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Example 3:

This embodiment is further optimized on the basis of the above embodiments. As shown in FIG. 1 , the power shaft 13 is connected to the rotating beam 12 through a spline.

It should be noted that, through the above improvements, a circular hole is provided at the connection between the rotating beam 12 and the power shaft 13, and the end of the power shaft 13 close to the rotating beam 12 passes through the round hole to connect with the rotating beam 12, and the circular hole An internal spline is installed, and an external spline used in conjunction with the internal spline is installed on the free end of the power shaft 13 close to the rotating beam 12. Through the cooperation of the internal spline and the external spline, the power shaft 13 and the rotating beam 12 are splined. key connection.

The spline connection method is used, the contact surface is large, and it can bear a large load; it has good neutrality, good guidance, and uniform force.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Example 4:

This embodiment is further optimized on the basis of the above-mentioned embodiments. As shown in FIG. 1 , the drive mechanism 10 also includes a first bearing 3 that is set at the end of the power shaft 13 away from the rotating beam 12 and rotates close to the power shaft 13. The second bearing 4 is fitted on one end of the beam 12; the first bearing 3 and the second bearing 4 are installed on the bearing frame 2 respectively. The first bearing 3 is a thrust bearing, and the second bearing 4 is a tapered roller bearing.

It should be noted that, through the above improvements, the first bearing 3 and the second bearing 4 are installed on the shoulder of the power shaft 13 respectively, the first bearing 3 is installed on the side away from the rotating beam 12, and the second bearing 4 is installed on the side close to the rotating beam 12. One side of the beam 12, meanwhile, the first bearing 3 and the second bearing 4 are also respectively connected with the bearing frame 2. Using a reasoning bearing as the first bearing 3 can effectively bear axial force, and using a tapered roller bearing can effectively bear radial force.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Example 5:

This embodiment is further optimized on the basis of the above embodiments. As shown in FIG. 1 , the base 1 is provided with a U-shaped chute, and the bottom of the driving motor 101 is slidably installed on the U-shaped chute.

It should be noted that, through the above improvements, the bottom of the drive motor 101 is connected to the base 1 through the U-shaped chute. When the position of the drive motor 101 needs to be adjusted, the relative position of the drive motor 101 in the direction of the U-shaped chute is moved. When the position is suitable, the drive motor 101 and the base 1 are fixed after being fixedly connected.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Embodiment 6:

This embodiment is further optimized on the basis of the above embodiments. As shown in FIG. 1 , the free end of the rotating beam 12 is provided with a rotating shaft 6 , and the 3D printer fixing box 5 is connected to the rotating beam 12 through the rotating shaft 6 .

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

Embodiment 7:

As shown in Figure 1, Figure 2 and Figure 3, the 3D printer auxiliary device used in the microgravity environment designed by the utility model, the base 1 is fixedly connected with the floor, the base 1 is provided with a bearing frame 2, and the base 1 is connected to the floor. The bearing frame 2 is an integral structure. The power shaft 13 is penetrated into the bearing frame 2, and bearings are installed at the shoulders at both ends of the power shaft 13, wherein the first bearing 3 is on the side of the power shaft 13 away from the rotating beam 12, and the first bearing 3 adopts a thrust bearing. The bearing 4 power shaft 13 is close to the side of the rotating beam 12, and the second bearing 4 adopts a conical stick bearing. A circular hole is provided in the middle of the rotating crossbeam 12, and the top of the power shaft 13 (the free end near the side of the rotating crossbeam 12) penetrates into the corresponding round hole of the rotating crossbeam 12, and the power shaft 13 and the rotating crossbeam 12 are fixed by a key connection. Even, the specific connection method is preferably spline connection. A sealing cover is installed on the top of the power shaft 13 to seal one end of the power shaft 13 to prevent dust from entering. The middle part of the power shaft 13 (between the first bearing 3 and the second bearing 4 ) is processed with a pulley, which is connected with the output shaft of the driving motor 101 through a belt. The motor base 1 of the driving motor 101 is installed on the base 1, and the corresponding position of the mounting hole of the motor base 1 on the base 1 is a U-shaped groove, so that the mounting bolts of the motor base 1 can slide along the U-shaped groove, so that the driving motor can be adjusted 101 position to adjust the tightness of the drive belt.

The 3D printer is installed in the D printer fixed box, and the top of the 3D printer fixed box 5 is processed with a circular hole. The circular hole penetrates the rotating shaft 6 and is connected with the rotating beam 12.

When the 3D printing operation needs to be carried out in the microgravity environment, the 3D printer is first loaded into the 3D printer fixing box 5, and the 3D printer is fixed. Then start the drive motor 101 to drive the power shaft 13 to start rotating, and the 3D printer fixed box 5 gradually changes from the vertical state shown in the figure to a horizontal state under the action of centrifugal force. With the increase of the driving motor 101 speed, the centrifugal force acts on the 3D printer fixed box 5 On the 3D printer, the use of centrifugal force to simulate the gravity of the earth allows the 3D printer to print in a microgravity environment.

According to the centrifugal force formula: Gravity = mass * angular velocity of rotation * angular velocity of rotation * radius of rotation, where gravity = mass * acceleration of gravity of the earth, therefore, it can be simplified to get: gravity of the earth = angular velocity of rotation * angular velocity of rotation * radius of rotation, that is, the known microgravity environment The value of the angular velocity generated at this time can be obtained by calculating the radius of rotation or the angular velocity of rotation. But to simulate the gravity of the earth, that is, the acceleration of gravity of the earth=9.8m/s ² , the necessary angular velocity of rotation can be obtained if the radius of rotation is known.

Embodiment 8:

The 3D printing device fixing box of the 3D printer auxiliary device used in the microgravity environment fixes the 3D printing device. When the drive motor drives the power shaft to rotate, the rotating beam connected with the power shaft spline will follow the rotation of the power shaft While rotating, the fixed box of the 3D printer connected to the rotating beam will slowly change from the state of vertically rotating the beam to the state parallel to the rotating beam under the action of centrifugal force. For this, all parts of the 3D printer including the molding materials will rotate together. Both have centrifugal force. The 3D printing material falls under the action of centrifugal force to form a printed product.

This design is mainly aimed at the FDM 3D printer as the research object. The principle of the 3D printing device to print products in the earth environment is: the 3D printer uses cylindrical wire with a certain diameter as the material, and the wire is tightened by the wire feeder, and at the same time the wire feeder rotates to send the wire into the 3D printer nozzle, the 3D printer nozzle There is a heating device to melt the wire sent to the nozzle. The melted wire is extruded out of the nozzle under the subsequent extrusion of the unmelted wire. The melted wire adheres to the printing base to cool and solidify, and the subsequently melted wire is in the solidified material Build up layer by layer and gradually take shape.

Since there is no gravity similar to the earth in the space environment, the FDM 3D printer wire can be sent into the nozzle under the extrusion of the wire feeder. When the wire entering the nozzle melts, there is no gravity or microgravity at this time. The wire may spread around and cannot be squeezed out of the nozzle. At this time, the centrifugal force generated by the rotation of the device simulates the gravity of the earth on an object with the same gravity. At this time, the melted wire is pushed to the nozzle inlet under the action of centrifugal force. It enters the extrusion nozzle under the subsequent extrusion of the unmelted wire, and the melted wire after extrusion is also extruded to the surface of the forming base plate under the action of centrifugal force, and after solidification, it is bonded to the base plate, and the subsequent melted wire repeats the above process until the model Finish molding.

Other parts of this embodiment are the same as those of the foregoing embodiments, so details are not repeated here.

The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Any simple modification or equivalent change made to the above embodiments according to the technical essence of the utility model falls within the scope of the present utility model. Within the protection scope of the present utility model.

Claims (7)

1. A kind of 1. 3D printer servicing unit used under microgravity environment, it is characterised in that：Including being provided with bearing bracket stand（2）'s Base（1）, free end 3D printer fixed case is installed（5）Rotating beam（12）And installed in base（1）It is upper to be used to drive Dynamic rotating beam（12）The drive mechanism of rotation（10）.
2. A kind of 2. 3D printer servicing unit used according to claim 1 under microgravity environment, it is characterised in that：It is described Drive mechanism（10）Including installed in base（1）On motor（101）And and rotating beam（12）The line shaft of connection （13）, the motor（101）Pass through belt drive system and line shaft（13）Drive connection.
3. A kind of 3. 3D printer servicing unit used according to claim 2 under microgravity environment, it is characterised in that：It is described Line shaft（13）Pass through spline and rotating beam（12）Connection.
4. A kind of 4. 3D printer servicing unit used according to claim 2 under microgravity environment, it is characterised in that：It is described Drive mechanism（10）Also include and line shaft（13）Away from rotating beam（12）One end suit clutch shaft bearing（3）And with moving Power axle（13）Close to rotating beam（12）One end suit second bearing（4）；The clutch shaft bearing（3）And second bearing（4） It is separately mounted to bearing bracket stand（2）On.
5. A kind of 5. 3D printer servicing unit used according to claim 4 under microgravity environment, it is characterised in that：It is described Clutch shaft bearing（3）Using thrust bearing, the second bearing（4）Using taper roll bearing.
6. 6. according to the 3D printer servicing unit used under a kind of any one of claim 2-5 microgravity environments, its feature It is：The base（1）On be provided with U-shaped chute, the motor（101）Basal sliding is arranged on U-shaped chute.
7. 7. according to the 3D printer servicing unit used under a kind of any one of claim 1-5 microgravity environments, its feature It is：The rotating beam（12）Free end be provided with rotating shaft（6）, the 3D printer fixed case（5）Pass through rotating shaft（6）With Rotating beam（12）Connection.