CN106313497A - Idler wheel - Google Patents

Abstract

The invention provides an idler wheel. The displacement of the idler wheel in the single X direction or the single Y direction is achieved through a drive wheel of the idler wheel. When a 3D printer moves in the direction perpendicular to the idler wheel rolling direction in the plane, a driven wheel on the drive wheel can roll in the direction, sliding friction between the drive wheel and the ground becomes rolling friction, friction force exerted on the 3D printer during moving is greatly reduced, moving of the 3D printer is smoother, and accordingly accurate moving control over the 3D printer is achieved.

Description

scroll wheel

technical field

The invention relates to the field of 3D printing, in particular to a roller.

Background technique

3D printer is a machine of rapid prototyping technology. It is a technology based on a digital model file and using bondable materials such as powdered metal or plastic to construct objects by layer-by-layer printing. Using a 3D printer to print the model does not require traditional cutting machine tools and molds. Under the control of the computer, the 3D entity can be directly formed according to the 3D model of the workpiece.

The horizontal displacement mechanism is a part of the plane movement of the 3D printer. In the existing horizontal displacement mechanism of the 3D printer equipped with rollers, the plane movement of the 3D printer is realized by the one-way roller or the assembly of the universal wheel, but the single The movement range of the directional roller is too single, and the universal wheel is difficult to control its movement accuracy, and it is difficult to meet the accuracy required by 3D printing.

Contents of the invention

The invention provides a roller to solve the problem that the existing 3D printers cannot balance the printing range and moving precision.

In order to achieve the above object, the present invention provides a roller, which is used in a horizontal displacement mechanism of a 3D printer. The roller includes a driving wheel and a number of driven wheels, and the side of the hub of the driving wheel is connected to the other end of the corresponding wheel shaft. The driven wheels are arranged in the driving wheel along the circumferential direction of the driving wheel, and the radial direction of the driven wheels is perpendicular to the tangential direction of the outer circumference of the driving wheel.

Further, the driven wheels are densely distributed on the driving wheels.

Further, the driving wheel is provided with multiple turns of driven wheels along its axial direction.

Further, the driving wheel is provided with four driven wheels along its axial direction.

Further, the 3D printer includes a base, a printing nozzle assembly, a vertical displacement mechanism and a horizontal displacement mechanism, a coordinate axis is established with the center of the base as the origin, and the vertical displacement mechanism is arranged on the base along the Z direction , the print nozzle assembly is connected to the vertical displacement mechanism, the horizontal displacement mechanism includes two X-direction displacement mechanisms and two Y-direction displacement mechanisms, and the two X-direction displacement mechanisms are respectively arranged on the Y-direction The two Y-direction displacement mechanisms are respectively arranged on the other two sides of the base along the X direction.

Further, the two X-direction displacement mechanisms both include the rollers, wheel shafts and motors, wherein the two motors are arranged on the lower bottom surface of the base, and the two rollers are respectively arranged on the bottom surface of the base along the Y direction. On opposite sides of the base, the two rollers roll towards the X direction, and the two axles are arranged along the Y direction, one end of which is connected to the corresponding motor, and the other end is connected to the corresponding roller.

Further, the two Y-direction displacement mechanisms both include the rollers, wheel shafts and motors, wherein the two motors are arranged on the lower bottom surface of the base, and the two rollers are respectively arranged on the bottom surface of the base along the X direction. On opposite sides of the base, the two rollers roll towards the Y direction, and the two axles are arranged along the X direction, one end of which is connected to the corresponding motor, and the other end is connected to the corresponding roller.

Further, the 3D printer also includes an electric control box, the electric control box is set in the base, the motors are connected to the electric control box by telecommunication, and the electric control box communicates with the control system through a USB interface. connect.

Further, the 3D printer also includes a motor bracket, the motor bracket is arranged on the lower bottom surface of the base, and the motor is arranged in the motor bracket.

Compared with the prior art, the present invention has the following beneficial effects:

The roller provided by the present invention realizes the displacement in the X direction or the Y direction through its driving wheel, and when the 3D printer moves in a direction perpendicular to the rolling direction of the roller in the plane, the driven wheel on the driving wheel can roll along this direction, The sliding friction between the driving wheel and the ground is changed to rolling friction, which greatly reduces the friction force on the 3D printer when it moves, making the movement of the 3D printer smoother, so as to realize the precise control of the movement of the 3D printer.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is a schematic structural diagram of a 3D printer provided by an embodiment of the present invention;

2 is a schematic diagram of an exploded structure of a 3D printer provided by an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a roller provided by an embodiment of the present invention.

In Figures 1 to 3,

1: base; 2: roller; 21: driving wheel; 22: driven wheel; 3: axle; 4: motor; 5: screw; 6: nozzle connecting rod; 7: electric control box; 71: USB interface; 8: motor Bracket; 9: guide rod; 10: top cover; 11: cushion block; 12: local angle adjustment frame; 13: turn block; 14: adjustment block; 15: arc groove; 16: support frame; 17: printing nozzle ; 18: nozzle fixture; 19: tray; 20: tray holder.

detailed description

The roller proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

The core idea of the present invention is to provide a roller, which realizes the displacement in the X direction or the Y direction through its driving wheel, and when the 3D printer moves in a direction perpendicular to the rolling direction of the roller in the plane, the movement on the driving wheel The driven wheel can roll in this direction, so that the sliding friction between the driving wheel and the ground becomes rolling friction, which greatly reduces the friction force suffered by the 3D printer when it moves, making the movement of the 3D printer smoother, so as to realize the smooth movement of the 3D printer. Precise control.

Please refer to Figures 1 to 3, Figure 1 is a schematic structural diagram of a 3D printer provided by an embodiment of the present invention; Figure 2 is a schematic diagram of an exploded structure of a 3D printer provided by an embodiment of the present invention; Figure 3 is a structure of a roller provided by an embodiment of the present invention schematic diagram.

As shown in Figure 3, the embodiment of the present invention provides a roller, which is used in the horizontal displacement mechanism of the 3D printer. The roller 2 includes a driving wheel 21 and a number of driven wheels 22. The other end of the wheel shaft 3 is connected, and the driven wheels 22 are arranged in the driving wheel 21 along the circumferential direction of the driving wheel 21, and the radial direction of the driven wheel 22 is tangent to the outer circumference of the driving wheel 21. direction perpendicular to each other.

The roller provided in the embodiment of the present invention realizes the displacement in the X direction or the Y direction through its driving wheel 21, and when the 3D printer moves in a direction perpendicular to the rolling direction of the driving wheel 21 in the plane, the driven wheel on the driving wheel 21 22 can roll along this direction, so that the sliding friction between the driving wheel 21 and the ground becomes rolling friction, which greatly reduces the friction force suffered by the 3D printer when it moves, making the movement of the 3D printer smoother, so as to realize the smooth movement of the 3D printer. Precise control.

Preferably, the plurality of driven wheels 22 can be densely distributed on the driving wheel 21 to increase the rolling friction area thereof.

Specifically, the driving wheel 21 is provided with multiple turns of the driven wheel 2 along its axial direction. Preferably, the driving wheel 21 is provided with four driven wheels 22 along its axial direction, so as to maximize its rolling friction area.

Further, as shown in Figures 1 and 2, the 3D printer includes a base 1, a print nozzle assembly, a vertical displacement mechanism and a horizontal displacement mechanism, and a coordinate axis is established with the center of the base 1 as the origin, that is, the coordinate The origin of the axis changes at any time with the movement of the center position of the base 1, the vertical displacement mechanism is arranged on the base 1 along the Z direction, the print nozzle assembly is connected with the vertical displacement mechanism, and the horizontal The displacement mechanism includes two X-direction displacement mechanisms and two Y-direction displacement mechanisms. The two X-direction displacement mechanisms are respectively arranged on both sides of the base 1 along the Y direction. The two Y-direction displacement mechanisms are arranged along the X direction They are respectively arranged on the other two sides of the base 1 .

Further, the two X-direction displacement mechanisms each include a roller 2, a wheel shaft 3 and a motor 4, wherein the two motors 4 are arranged on the lower bottom surface of the base 1, and the two rollers 2 are arranged along the Y are arranged on opposite sides of the base 1 respectively, and the two rollers 2 roll towards the X direction, and the two wheel shafts 3 are arranged along the Y direction, one end of which is connected with the corresponding motor 4, and the other end is connected with the corresponding motor 4. The corresponding roller 2 is connected.

Further, the two Y-direction displacement mechanisms each include a roller 2, a wheel shaft 3 and a motor 4, wherein the two motors 4 are arranged on the lower bottom surface of the base 1, and the two rollers 2 are arranged along the X They are arranged on opposite sides of the base 1 respectively, and the two rollers 2 roll towards the Y direction, and the two axles 3 are arranged along the X direction, one end of which is connected with the corresponding motor 4, and the other end is connected with the corresponding motor 4. The corresponding roller 2 is connected.

The structures of the X-direction displacement mechanism and the Y-direction displacement mechanism are the same, and the rolling directions of the rollers 2 are different, so that they can drive the base 1 and the print nozzle assembly above it to move along the X and Y directions. At the same time, the axles 3 in the X-direction displacement mechanism and the Y-direction displacement mechanism are respectively driven by different motors 4, so that the 3D printer realizes the function of rotation, so as to achieve the purpose of adjusting the forward direction of the 3D printer.

When the driving wheel 21 in the X-direction displacement mechanism rolls, the driven wheel 22 in the Y-direction displacement mechanism rolls, so that the friction force of the driving wheel 21 in the Y-direction displacement mechanism will not become an obstacle to advance. When the driving wheel 21 in the mechanism rolls, the driven wheel 22 in the X-direction displacement mechanism rolls, so that the friction force of the driving wheel 21 in the X-direction displacement mechanism will not become an obstacle to advance. When moving forward, the sliding friction between the driving wheel 21 and the ground becomes rolling friction, which greatly reduces the frictional force and makes the movement of the 3D printer smoother.

The 3D printer provided by the embodiment of the present invention can move simultaneously through two X-direction displacement mechanisms or two Y-direction displacement mechanisms during printing to drive the base 1 and the print nozzle assembly above it to move along the X-direction or Y-direction. The action of a single X-direction displacement mechanism or Y-direction displacement mechanism drives the base 1 and the print nozzle assembly above it to rotate around another X-direction displacement mechanism or Y-direction displacement mechanism to achieve the purpose of adjusting the forward direction, so that The 3D printer can move to any position in the plane, so the plane printing range of the 3D printer provided by the present invention is theoretically unlimited, but in practical applications, compared with the existing printers with the same volume, its printing range is The advantage is also quite obvious, while reducing the cost, it also improves the space utilization.

Further, the vertical displacement mechanism includes a screw 5, a nozzle connecting rod 6 and a motor (not shown in the figure), the motor is arranged on the lower bottom surface of the base 1, the screw 5 is arranged along the Z direction, and its One end passes through the base 1 and is connected to the motor, and one end of the nozzle connecting rod 6 is screwed to the screw rod 5 . Through the action of the motor in the vertical displacement mechanism, the screw rod 5 is driven to rotate, and then the nozzle connecting rod 6 threadedly connected with the screw rod 5 can rise and fall along the Z direction, increasing the vertical printing range of the print nozzle assembly connected thereto.

Further, the 3D printer also includes an electric control box 7, the electric control box 7 is arranged in the base 1, the motor 4 in the X-direction displacement mechanism, the Y-direction displacement mechanism and the motor 4 in the vertical displacement mechanism The motors are all connected by telecommunication with the electric control box 7 , and the electric control box 7 is connected by telecommunication with the control system through the USB interface 71 . When the 3D printer is printing, the staff can connect the control system to the electric control box 7 through the USB interface 71 to adjust the speed of each motor, so as to precisely control the X-direction displacement mechanism, the Y-direction displacement mechanism and the vertical displacement mechanism. 3D printer plane and vertical precise displacement.

Further, the 3D printer also includes a motor bracket 8, the motor bracket 8 is arranged on the lower bottom surface of the base 1, the motor 4 in the X-direction displacement mechanism, the Y-direction displacement mechanism and the vertical displacement mechanism The motors are all arranged in the motor bracket 8, which increases the stability of the motor work.

Further, the vertical displacement mechanism also includes a guide rod 9, a top cover 10 and a spacer 11, the spacer 11 is arranged on the base 1, the screw rod 5 passes through the spacer 11, the The top cover 10 is arranged on the screw rod 5, the guide rod 9 is arranged along the Z direction, one end thereof is connected to the top cover 10, and the other end passes through one end of the nozzle connecting rod 6 to be connected to the pad 11 . The structural design of the guide rod 9 enables the nozzle connecting rod 6 to move up and down only along the guide rod 9 arranged in the Z direction when the screw rod 5 rotates, which increases the Z-direction movement and working stability of the print nozzle assembly.

Further, the number of the guide rods 9 is three, and the three guide rods 9 are arranged at equal angular intervals around the screw rod 5, so as to maximize the Z-direction movement and the working stability of the print nozzle assembly.

Further, the 3D printer also includes a partial angle adjustment frame 12, one end of the partial angle adjustment frame 12 has a turning block 13, and the turning block 13 is arranged on the base 1 and can rotate around its own center , the spacer 11 is arranged on the rotary block 13, the screw 5 passes through the rotary block 13, the other end of the local angle adjustment frame 12 has an adjustment block 14, and the base 1 is close to the The position of the adjusting block 14 is provided with an arc groove 15 with the center of the turning block 13 as the center of the circle, the adjusting block 14 is located in the arc groove 15, and the arc groove 15 is arranged along the turning block. The length of 13 in the radial direction matches the size of the adjustment block 14 . When the print nozzle assembly needs to be fine-tuned for the angle, rotate the rotary block 13, and the rotary block 13 will drive the spacer 11 above it, the guide rod 9 and the top cover 10 to rotate together, and then drive the nozzle connecting rod 6 to rotate the block 13. The rotation of the center of the circle realizes the fine adjustment of the printing angle of the print nozzle assembly. At the same time, the adjustment block 14 also moves in the arc groove 15, and the rotation range of the nozzle connecting rod 6 is limited by the range of the arc groove 15.

Further, the 3D printer also includes a support frame 16 , the support frame 16 is set on the partial angle adjustment frame 12 , and the nozzle connecting rod 6 is set on the support frame 16 . The support frame 16 is used to support the main part of the nozzle connecting rod 6 so that it will not vibrate when moving or working, so as to increase the stability of the print nozzle assembly during movement and printing.

Further, the print nozzle assembly includes a print nozzle 17 and a nozzle holder 18, the nozzle holder 18 is connected to the vertical displacement mechanism through the nozzle connecting rod 6, and the nozzle holder 18 fixes the print nozzle 17 to increase The stability of the printing nozzle 17 when moving and working.

Further, the 3D printer also includes a tray 19 and a tray holder 20, the tray holder 20 is arranged on the base 1, the tray 19 is arranged on the tray holder 20, and the tray holder 20 is arranged on the tray holder 20. The tray 19 is connected to the printing nozzle 17 through a feeding pipeline (not shown in the figure), and the feeding tray 19 is used to feed the printing nozzle 17 to realize the printing function of the small-volume 3D printer.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these changes and modifications of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims (9)

1. A roller, which is used for a horizontal displacement mechanism of a 3D printer, is characterized in that the roller comprises a driving wheel and some driven wheels, and the side of the hub of the driving wheel is connected to the other end of the corresponding wheel shaft, the Several driven wheels are arranged in the driving wheel along the circumferential direction of the driving wheel, and the radial direction of the driven wheels is perpendicular to the tangential direction of the outer circumference of the driving wheel. 2. The roller according to claim 1, wherein the driven wheels are densely distributed on the driving wheels. 3. The roller according to claim 1, characterized in that, the driving wheel is provided with multiple turns of driven wheels along its axial direction. 4. The roller according to claim 3, characterized in that, the driving wheel is provided with four driven wheels along its axial direction. 5. The roller according to any one of claims 1 to 4, wherein the 3D printer comprises a base, a print nozzle assembly, a vertical displacement mechanism and a horizontal displacement mechanism, and the coordinates are established with the center of the base as the origin axis, the vertical displacement mechanism is arranged on the base along the Z direction, the print head assembly is connected with the vertical displacement mechanism, and the horizontal displacement mechanism includes two X-direction displacement mechanisms and two Y-direction displacement mechanisms mechanism, the two X-direction displacement mechanisms are respectively arranged on both sides of the base along the Y direction, and the two Y-direction displacement mechanisms are respectively arranged on the other two sides of the base along the X direction. 6. The roller according to claim 5, wherein the two X-direction displacement mechanisms all include the roller, a wheel shaft and a motor, wherein the two motors are all arranged on the lower bottom surface of the base , the two rollers are respectively arranged on opposite sides of the base along the Y direction, and the two rollers both roll towards the X direction, and the two wheel shafts are arranged along the Y direction, and one end thereof is connected to the corresponding motor , and the other end is connected with the corresponding roller. 7. The roller according to claim 5, wherein the two Y-direction displacement mechanisms all include the roller, a wheel shaft and a motor, wherein the two motors are all arranged on the lower bottom surface of the base , the two rollers are respectively arranged on opposite sides of the base along the X direction, and both of the rollers roll toward the Y direction, and the two wheel shafts are arranged along the X direction, and one end thereof is connected to a corresponding motor , and the other end is connected with the corresponding roller. 8. The roller according to claim 6 or 7, wherein the 3D printer further comprises an electric control box, the electric control box is arranged in the base, and the motors are all in communication with the electric control box The electric control box is connected with the control system through a USB interface. 9. The roller according to claim 6 or 7, wherein the 3D printer further comprises a motor bracket, the motor bracket is arranged on the lower bottom surface of the base, and the motor is arranged in the motor bracket .