Synchronous belt tensioning mechanism and 3D printer

Abstract

The synchronous belt tensioning mechanism comprises an installation frame, a first motor assembly and a second motor assembly, the first motor assembly and the second motor assembly are fixed to the installation frame, the first motor assembly comprises a first motor which is provided with a first synchronous belt wheel, and the second motor assembly comprises a second motor which is provided with a second synchronous belt wheel. The second motor is provided with a second synchronous belt wheel, the first synchronous belt wheel drives the first synchronous belt to move, the second synchronous belt wheel drives the second synchronous belt to move, and a tensioning spring is connected between the first motor assembly and the second motor assembly. And the tensioning spring is connected between the first motor assembly and the second motor assembly, so that the tensioning forces on the two synchronous belts are completely consistent. And one set of tensioning mechanism is reduced, and the tensioning forces on the two synchronous tensioning mechanisms can be completely consistent, so that vibration lines and layered lines generated during printing are effectively reduced, and the printing quality is improved.

Description

Technical Field

[0001] The utility model belongs to the field of 3D printing, and particularly relates to a synchronous belt tensioning mechanism and a 3D printer. Background Art

[0002] 3D printing is a rapid prototyping technology for manufacturing three-dimensional objects by adding materials layer by layer. The basic working principle of 3D printing is to connect a computer and a 3D printer. By controlling the printing path of the 3D printer through the computer, the three-dimensional model of the object is printed layer by layer onto the working platform, and finally an object with a three-dimensional structure is printed. The materials that can be applied by 3D printers are extensive, including metals, plastics, composite materials, etc.

[0003] In the current 3D printing technology, the motor drives the printing nozzle to move in the XY plane through two synchronous belts. However, two sets of tensioning mechanisms are required, and the tension of the two synchronous belts cannot be adjusted to be consistent, which will cause the size of the printed model to be inaccurate, and vibration marks will appear on the surface of the model, resulting in low printing quality. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a synchronous belt tensioning mechanism, which can simultaneously tension two synchronous belts and effectively improve the printing quality.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The synchronous belt tensioning mechanism includes a mounting frame, a first motor assembly and a second motor assembly. The first motor assembly and the second motor assembly are fixed on the mounting frame. The first motor assembly includes a first motor, and the first motor is provided with a first synchronous belt pulley. The second motor assembly includes a second motor, and the second motor is provided with a second synchronous belt pulley. The first synchronous belt pulley drives the first synchronous belt to move, and the second synchronous belt pulley drives the second synchronous belt to move. A tension spring is connected between the first motor assembly and the second motor assembly.

[0007] By the tension spring connected between the first motor assembly and the second motor assembly, the tension on the two synchronous belts is made completely consistent.

[0008] Furthermore, the first motor assembly further includes a first motor fixing seat for mounting the first motor, and the second motor assembly further includes a second motor fixing seat for mounting the second motor. The first motor fixing seat and the second motor fixing seat are both provided with adjustable mounting holes. The first motor fixing seat and the second motor fixing seat are fixed on the mounting frame through fasteners, and a tension spring is connected between the first motor fixing seat and the second motor fixing seat.

[0009] The positions of the first motor fixing seat and the second motor fixing seat can be moved left and right through the mounting holes, so as to adjust the positions of the first motor and the second motor.

[0010] Furthermore, the mounting rack is provided with a first mounting platform and a second mounting platform. The first motor fixing seat is mounted on the first mounting platform, and the second motor fixing seat is mounted on the second mounting platform. There is a height difference between the first mounting platform and the second mounting platform in the vertical direction.

[0011] The first motor and the second motor are respectively mounted on the first mounting platform and the second mounting platform with different heights, so that the first synchronous belt and the second synchronous belt will not affect each other's rotation, reducing the volume.

[0012] Furthermore, the first motor fixing seat and the second motor fixing seat are both provided with hooks arranged oppositely. Both ends of the tension spring are provided with connecting rings, and the connecting rings are sleeved on the hooks.

[0013] The arrangement of the connecting rings and the hooks facilitates the installation and removal of the tension spring.

[0014] Furthermore, it further includes a first idler pulley assembly and a second idler pulley assembly. The first synchronous belt is wound around the first idler pulley assembly, and the second synchronous belt is wound around the second idler pulley assembly.

[0015] The first idler pulley assembly and the second idler pulley assembly are used for winding and transmitting the synchronous belt.

[0016] Furthermore, the mounting rack is fixed with a first Y-axis optical axis and a second Y-axis optical axis. The first Y-axis optical axis and the second Y-axis optical axis are respectively slidably mounted with a first bearing seat and a second bearing seat. A first X-axis optical axis and a second X-axis optical axis are provided between the first bearing seat and the second bearing seat. One idler pulley in the first idler pulley assembly and one idler pulley in the second idler pulley assembly are provided in the first bearing seat. One idler pulley in the first idler pulley assembly and one idler pulley in the second idler pulley assembly are provided in the second bearing seat. The first synchronous belt passes through the first synchronous pulley and the first idler pulley assembly, and the second synchronous belt passes through the second synchronous pulley and the second idler pulley assembly.

[0017] The print head is mounted on the first X-axis optical axis and the second X-axis optical axis, and the print head is driven to move along the X and Y axes by the first synchronous belt and the second synchronous belt.

[0018] Furthermore, the mounting rack is provided with an assembly reference plane in the vertical direction, and the first bearing seat and the second bearing seat can respectively abut against the assembly reference plane.

[0019] After installation, if the X-axis and the Y-axis are not perpendicular, the first bearing seat and the second bearing seat can be slid, and the first bearing seat and the second bearing seat are respectively abutted against the assembly reference plane to adjust the X and Y axes to be perpendicular, and at this time, the tension forces on the two synchronous belts can still be ensured to be consistent.

[0020] Synchronous belt tensioning mechanism, including a mounting frame, a first motor assembly, a second motor assembly, a first idler pulley assembly and a second idler pulley assembly. The first motor assembly and the second motor assembly are fixed to the mounting frame. The first motor assembly includes a first motor, and the first motor is provided with a first synchronous belt pulley. The second motor assembly includes a second motor, and the second motor is provided with a second synchronous belt pulley. The first synchronous belt pulley drives the first synchronous belt to move, and the second synchronous belt pulley drives the second synchronous belt to move. The first synchronous belt is wound around the first idler pulley assembly, and the second synchronous belt is wound around the second idler pulley assembly. A tension spring is connected between the first idler pulley assembly and the second idler pulley assembly.

[0021] Connecting a tension spring between the first idler pulley assembly and the second idler pulley assembly can also achieve the effect of simultaneously tensioning the first synchronous belt and the second synchronous belt.

[0022] A 3D printer, including a synchronous belt tensioning mechanism and a 3D print head.

[0023] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0024] By connecting a tension spring between the first motor assembly and the second motor assembly or between the first idler pulley assembly and the second idler pulley assembly, the tension forces on the two synchronous belts are made exactly the same. One set of tensioning mechanism is reduced, and the tension forces on the two synchronous belts can be made exactly the same, effectively reducing the vibration lines and layer lines generated during printing and improving the printing quality. The setting of the assembly reference surface facilitates the adjustment of the perpendicularity of the X and Y axes and can ensure that the tension forces on the two synchronous belts are exactly the same. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following further describes the utility model with reference to the drawings.

[0026] Figure 1 It is a schematic structural diagram of the synchronous belt tensioning mechanism in Embodiment 1.

[0027] Figure 2 For Figure 1 A schematic structural diagram in another direction.

[0028] Figure 3 It is a schematic structural diagram of the synchronous belt tensioning mechanism after hiding the mounting frame.

[0029] Figure 4 For Figure 3 A schematic structural diagram in another direction.

[0030] Figure 5 It is a schematic structural diagram of the synchronous belt tensioning mechanism in Embodiment 2. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Embodiment 1

[0032] AsFigure 1 The shown synchronous belt tensioning mechanism includes a mounting frame 1, a first motor assembly, and a second motor assembly. The mounting frame 1 is provided with a first mounting platform 2 and a second mounting platform 3, and the height of the first mounting platform 2 is higher than that of the second mounting platform 3. The first motor assembly includes a first motor 4 and a first motor fixing seat 5. The first motor 4 is fixed to the first motor fixing seat 5 by fasteners such as screws 25. The first motor fixing seat 5 is provided with three elongated mounting holes 6, and the first motor fixing seat 5 is fixed to the first mounting platform 2 on the mounting frame 1 through the screws 25 in the mounting holes 6.

[0033] The second motor assembly includes a second motor 8 and a second motor fixing seat 9. The second motor 8 is fixed to the second motor fixing seat 9, and the second motor fixing seat 9 is mounted on the second mounting platform 3 through the mounting holes 6. Both the first motor fixing seat 5 and the second motor fixing seat 9 are provided with hooks 7. The hook 7 of the first motor fixing seat 5 faces downward, and the hook 7 of the second motor fixing seat 9 faces upward so that the tension spring 10 is at the same height. Both ends of the tension spring 10 are provided with connecting rings 11, and the connecting rings 11 at both ends are respectively sleeved on the two hooks 7. The mounting holes 6 are waist-shaped holes for adjusting the positions of the first motor fixing seat 5 and the second motor fixing seat 9. The length direction of the waist-shaped holes is the same as the connecting line direction between the first motor 4 and the second motor 8 to adjust the relative distance between the first motor fixing seat 5 and the second motor fixing seat 9.

[0034] The first motor 4 is provided with a first synchronous belt pulley 12, and the second motor 8 is provided with a second synchronous belt pulley 13. The mounting frame 1 is provided with a first idler pulley assembly 14 and a second idler pulley assembly 15. The first synchronous belt 16 is wound around the first synchronous belt pulley 12 and the first idler pulley assembly 14, and the second synchronous belt 17 is wound around the second synchronous belt pulley 13 and the second idler pulley assembly 15. The first synchronous belt pulley 12 drives the first synchronous belt 16 to move, and the second synchronous belt pulley 13 drives the second synchronous belt 17 to move.

[0035] The mounting frame 1 is fixed with a first Y-axis optical axis 18 and a second Y-axis optical axis 19. A first bearing block 20 and a second bearing block 21 are respectively slidably mounted on the first Y-axis optical axis 18 and the second Y-axis optical axis 19. A first X-axis optical axis 22 and a second X-axis optical axis 23 are provided between the first bearing block 20 and the second bearing block 21. One of the idler pulleys (not shown in the figure) in the first idler pulley assembly 14 and one of the idler pulleys (not shown in the figure) in the second idler pulley assembly 15 are distributed vertically in the first bearing block 20. One of the idler pulleys (not shown in the figure) in the first idler pulley assembly 14 and one of the idler pulleys (not shown in the figure) in the second idler pulley assembly 15 are distributed vertically in the second bearing block 21. The first synchronous belt 16 passes through the first synchronous belt pulley 12 and the first idler pulley assembly 14, and the second synchronous belt 17 passes through the second synchronous belt pulley 13 and the second idler pulley assembly 15.

[0036] The mounting bracket 1 is provided with an assembly reference plane 24 in the vertical direction, and the first bearing block 20 and the second bearing block 21 can respectively abut against the assembly reference plane 24. If the X-axis and the Y-axis are not perpendicular, the first bearing block 20 and the second bearing block 21 can be slid, and the first bearing block 20 and the second bearing block 21 are respectively abutted against the assembly reference plane 24 to adjust the X-axis and the Y-axis to be perpendicular, and at this time, the tension forces on the two synchronous belts can still be ensured to be the same.

[0037] Embodiment 2

[0038] The synchronous belt tensioning mechanism is mostly the same as that in Embodiment 1, the difference being that the tension spring 10 is connected between the first idler pulley assembly 14 and the second idler pulley assembly 15, and it can also achieve simultaneous tensioning of the first synchronous belt 16 and the second synchronous belt 17 and make the tension forces the same.

[0039] The above are only specific embodiments of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present utility model to solve substantially the same technical problems and achieve substantially the same technical effects are all covered by the protection scope of the present utility model.

Claims

1. Synchronous belt tensioning mechanism, characterized by: It includes a mounting frame, a first motor assembly and a second motor assembly, wherein the first motor assembly and the second motor assembly are fixed to the mounting frame, the first motor assembly includes a first motor, the first motor is provided with a first synchronous pulley, the second motor assembly includes a second motor, the second motor is provided with a second synchronous pulley, the first synchronous pulley drives the first synchronous belt to move, the second synchronous pulley drives the second synchronous belt to move, and a tension spring is connected between the first motor assembly and the second motor assembly.

2. The synchronous belt tensioning mechanism according to claim 1, characterized in that: The first motor assembly also includes a first motor fixing seat for mounting the first motor, and the second motor assembly also includes a second motor fixing seat for mounting the second motor, the first motor fixing seat and the second motor fixing seat are both provided with adjustable mounting holes, the first motor fixing seat and the second motor fixing seat are fixed to the mounting frame by fasteners, and the tension spring is connected between the first motor fixing seat and the second motor fixing seat.

3. The synchronous belt tensioning mechanism according to claim 2, characterized in that: The mounting frame is provided with a first mounting platform and a second mounting platform, the first motor fixing seat is mounted on the first mounting platform, the second motor fixing seat is mounted on the second mounting platform, and the first mounting platform and the second mounting platform have a height difference in the vertical direction.

4. The synchronous belt tensioning mechanism according to claim 2, characterized in that: The first motor fixing seat and the second motor fixing seat are both provided with hooks arranged opposite to each other, and connecting rings are arranged at both ends of the tension spring, and the connecting rings are sleeved on the hooks.

5. The synchronous belt tensioning mechanism according to claim 1, characterized in that: The invention also includes a first idler wheel assembly and a second idler wheel assembly, wherein the first synchronous belt is wound around the first idler wheel assembly, and the second synchronous belt is wound around the second idler wheel assembly.

6. The synchronous belt tensioning mechanism according to claim 5, characterized in that: The mounting frame is fixed with a first Y-axis optical axis and a second Y-axis optical axis, and the first Y-axis optical axis and the second Y-axis optical axis are slidably mounted with a first bearing seat and a second bearing seat respectively, and a first X-axis optical axis and a second X-axis optical axis are arranged between the first bearing seat and the second bearing seat, and one of the idlers in the first idler assembly and one of the idlers in the second idler assembly are arranged in the first bearing seat, and one of the idlers in the first idler assembly and one of the idlers in the second idler assembly are arranged in the second bearing seat, the first synchronous belt passes through the first synchronous pulley and the first idler assembly, and the second synchronous belt passes through the second synchronous pulley and the second idler assembly.

7. The synchronous belt tensioning mechanism according to claim 6, characterized in that: The mounting frame is provided with an assembly reference surface in a vertical direction, and the first bearing seat and the second bearing seat can respectively abut against the assembly reference surface.

8. Synchronous belt tensioning mechanism, characterized by: It includes a mounting frame, a first motor assembly, a second motor assembly, a first idler assembly and a second idler assembly, the first motor assembly and the second motor assembly are fixed to the mounting frame, the first motor assembly includes a first motor, the first motor is provided with a first synchronous pulley, the second motor assembly includes a second motor, the second motor is provided with a second synchronous pulley, the first synchronous pulley drives the first synchronous belt to move, the second synchronous pulley drives the second synchronous belt to move, the first synchronous belt is wound around the first idler assembly, the second synchronous belt is wound around the second idler assembly, and a tension spring is connected between the first idler assembly and the second idler assembly.

9. A 3D printer, characterized in that: It comprises a synchronous belt tensioning mechanism and a 3D nozzle as described in any one of claims 1 to 8.

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