Synchronous belt tensioning device for 3D printer, 3D printer, and 3D printing system

Abstract

The present application provides a synchronous belt tensioning device for a 3D printer, the 3D printer, and a 3D printing system. In the synchronous belt tensioning device, a motor is fixedly connected to a frame, a motor shaft of the motor is connected to a driving wheel, and the driving wheel is connected to a driven wheel by means of a synchronous belt; one end of a tensioning block is fixedly connected to the frame, and the other end of the tensioning block is provided with an adjustment hole; the tensioning block is further connected to a driven shaft of the driven wheel between the end fixedly connected to the frame and the adjustment hole; and the tensioning block changes the distance between the driven wheel and the driving wheel when the tensioning block is at different positions relative to the frame. By implementing the present application, the position of the driven wheel can be adjusted by adjusting the tensioning block so as to complete the tensioning of the synchronous belt, and compared with the tensioning of the synchronous belt by means of a tensioning wheel, embodiments of the present application can complete the tensioning of the synchronous belt by using less space.

Description

Synchronous belt tensioning device for 3D printer, 3D printer and 3D printing system

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 28, 2023, with application number 202322325515.6 and application name “Timing belt tensioning device for 3D printer, 3D printer and 3D printing system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of 3D printing, and in particular to a synchronous belt tensioning device for a 3D printer, a 3D printer, and a 3D printing system. Background Art

[0003] During 3D printing, a motor is required to pull the slider through a timing belt to achieve printing in all directions. The tension of the timing belt affects the printer's printing efficiency. Furthermore, because the timing belt is flexible, it can become loose after a period of use, which can affect the movement of the slider.

[0004] In order to solve the problem of loose synchronous belt, the synchronous belt can be tightened by installing a tensioning pulley, as shown in Figure 1: By adjusting the position of the tensioning pulley, the synchronous belt can be tightened.

[0005] Although this method can achieve the tensioning of the synchronous belt, it requires reserving a certain amount of space for the tensioning wheel, which will increase the space occupied by the tensioning of the synchronous belt.

[0006] Summary of the Invention

[0007] The present application provides a synchronous belt tensioning device for a 3D printer, a 3D printer, and a 3D printing system, which can reduce the space required for synchronous belt tensioning and have good compactness.

[0008] In a first aspect, an embodiment of the present application provides a synchronous belt tensioning device for a 3D printer, the synchronous belt tensioning device comprising a frame, a tensioning block, a driving wheel, a driven wheel and a motor; wherein,

[0009] The motor is fixedly connected to the frame, the motor shaft of the motor is connected to the driving wheel, and the driving wheel and the driven wheel are connected by a synchronous belt;

[0010] One end of the tensioning block is fixedly connected to the frame, and the other end of the tensioning block is provided with an adjustment hole, and the adjustment hole is used to adjust the position of the tensioning block relative to the frame;

[0011] In addition, the tensioning block is also connected to the driven shaft of the driven wheel between one end fixedly connected to the frame and the adjustment hole. The tensioning block is used to change the distance between the driven wheel and the driving wheel when the position of the tensioning block relative to the frame is different.

[0012] In an embodiment of the present application, the position of the driven pulley is adjusted by adjusting the position of the tensioning block relative to the frame, thereby changing the distance between the driven pulley and the driving pulley, thereby achieving tensioning of the synchronous belt wound between the driving pulley and the driven pulley. Compared to tensioning the synchronous belt using a tensioning pulley, the embodiment of the present application can utilize less space to complete the tensioning of the synchronous belt, resulting in good spatial compactness. The embodiment of the present application is also suitable for scenarios with only two rotating parts, that is, for tensioning a synchronous belt with one driving pulley and one driven pulley.

[0013] Optionally, the tensioning block can be connected to the rotating shaft of the driving wheel between one end connected to the frame and the other end. At this time, the position of the driving wheel can be adjusted by adjusting the position of the tensioning block relative to the frame, thereby changing the distance between the driven wheel and the driving wheel, thereby achieving tensioning of the synchronous belt wound between the driving wheel and the driven wheel.

[0014] In combination with the first aspect, in a first possible implementation, the frame is provided with a plurality of fixing holes along the direction of movement of the synchronous belt, and the plurality of fixing holes are used to fix the other end of the tensioning block after the position of the tensioning block relative to the frame is adjusted to a preset position.

[0015] In the embodiments of the present application, the position of the fixing holes corresponds to the degree of tension in the synchronous belt, meaning each fixing hole corresponds to a different tension in the synchronous belt. For example, when the other end of the tensioning block is fixed to the fixing hole closest to the driving pulley, the tension in the synchronous belt decreases, loosening the belt; when the other end of the tensioning block is fixed to the fixing hole farther from the driving pulley, the tension in the synchronous belt increases, tightening the belt. The embodiments of the present application allow the setting of the synchronous belt tensioning position using the fixing holes, making it convenient and quick.

[0016] In combination with the first aspect or any one of the above possible implementations of the first aspect, in a second possible implementation, the adjustment hole is an arc-shaped hole. The arc-shaped hole can also be called a waist-shaped hole. That is, the embodiment of the present application can provide a preset movement space for the driven wheel. When adjusting the tension of the synchronous belt, the tightening component can fix the tensioning block within the aperture of the waist-shaped hole, thereby fixing the position of the driven wheel and completing the adjustment of the tension of the synchronous belt.

[0017] In combination with the first aspect or any one of the above possible implementations of the first aspect, in a third possible implementation, a screw anti-rotation pad is provided on the adjustment hole.

[0018] In the embodiment of the present application, the screw anti-rotation pad can prevent the screw in the adjustment hole from loosening during the operation of the machine, thereby affecting the tensioning effect of the synchronous belt. That is, the implementation of the embodiment of the present application can improve the reliability of the tensioning of the synchronous belt.

[0019] In combination with the first aspect or any one of the foregoing possible implementations of the first aspect, a fourth possible implementation further includes:

[0020] a torsion spring, one end of which is connected to the tensioning block;

[0021] The frame is provided with a torsion spring limiting component, which is used to suspend the other end of the torsion spring. Exemplarily, the torsion spring limiting component can be a torsion spring limiting screw.

[0022] In the embodiment of the present application, a more precise force is applied to the tensioning block by a torsion spring, so that the synchronous belt can be tensioned more accurately, thereby improving the accuracy of the tensioning of the synchronous belt.

[0023] In combination with the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner, one end of the tensioning block is fixedly connected to the frame via a fixed shaft;

[0024] One end of the torsion spring is connected to the tensioning block, which is specifically implemented as follows:

[0025] One end of the torsion spring is connected to the fixed shaft.

[0026] In the embodiment of the present application, the magnitude of the tensioning force of the synchronous belt can be controlled by controlling the elastic force of the torsion spring.

[0027] In combination with the first aspect or any one of the foregoing possible implementations of the first aspect, in a sixth possible implementation, the synchronous belt tensioning device further includes a rotating shaft screw and a rotating shaft nut;

[0028] One end of the tensioning block is fixedly connected to the frame, comprising:

[0029] A shaft screw, one end of which is fixed to the frame of the 3D printer, and the other end of which passes through the first end of the tensioning block and protrudes from the surface of the first end of the tensioning block;

[0030] The shaft nut is connected to the portion of the shaft screw protruding from the surface of the first end of the tensioning block in a threaded manner.

[0031] In the embodiment of the present application, the synchronous belt tensioning device can be flexibly installed and disassembled.

[0032] In combination with the first aspect or any one of the foregoing possible implementations of the first aspect, in a seventh possible implementation, a slider is provided on the synchronous belt, and the slider is connected to a print head of the 3D printer.

[0033] In the embodiment of the present application, the synchronous belt used to move the print head can be tensioned based on a smaller space.

[0034] In combination with the first aspect or in combination with the second possible implementation manner of the first aspect to the sixth possible implementation manner of the first aspect, in an eighth possible implementation manner, a slider is provided on the synchronous belt, and the slider is connected to the hot bed of the 3D printer.

[0035] In the embodiment of the present application, the synchronous belt used to move the hot bed can be tensioned based on a smaller space.

[0036] In combination with the first aspect or in combination with the seventh possible implementation manner of the first aspect to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner, a slider is provided on the synchronous belt, and an accelerometer is provided on the slider.

[0037] In the embodiment of the present application, the fixed frequency of the slider may be measured based on an accelerometer.

[0038] In combination with the first aspect or in combination with the seventh possible implementation method of the first aspect to the eighth possible implementation method of the first aspect, in a tenth possible implementation method, a slider is provided on the synchronous belt, and the synchronous belt tensioning device also includes: a coil and a resonance unit, the coil is connected to the resonance unit, the moving direction of the slider is perpendicular to the plane where the coil is located, and the slider is within the magnetic field range of the coil.

[0039] In the embodiment of the present application, the fixed frequency of the slider can be measured in a low-cost manner.

[0040] In a second aspect, an embodiment of the present application further provides a 3D printer, characterized in that the 3D printer includes a synchronous belt and a synchronous belt tensioning device described in combination with the first aspect or in combination with any one of the above possible implementations of the first aspect.

[0041] In a third aspect, an embodiment of the present application further provides a 3D printing system, comprising a feeding device and a 3D printer as described in any one of the possible implementation methods described above in combination with the first aspect or the second aspect; wherein the feeding device is connected to the 3D printer.

[0042] It should be understood that the implementation and beneficial effects of the above-mentioned aspects of the present application can be referenced to each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a schematic diagram of a tensioning pulley of a 3D printer system in the prior art;

[0044] FIG2 is a schematic diagram of a scenario of a 3D printing system provided in an embodiment of the present application;

[0045] FIG3 a is a schematic plan view of the structure of a synchronous belt tensioning device provided in an embodiment of the present application;

[0046] FIG3 b is another schematic plan view of the structure of the synchronous belt tensioning device provided in an embodiment of the present application;

[0047] FIG4 is another schematic plan view of the structure of a synchronous belt tensioning device according to an embodiment of the present application;

[0048] FIG5 is another schematic plan view of the structure of a synchronous belt tensioning device according to an embodiment of the present application;

[0049] FIG6 a is a planar structural diagram of a partial structure of a synchronous belt tensioning device provided in an embodiment of the present application;

[0050] FIG6 b is another planar structural diagram of a partial structure of a synchronous belt tensioning device provided in an embodiment of the present application;

[0051] FIG6 c is another planar structural schematic diagram of a partial structure of the synchronous belt tensioning device provided in an embodiment of the present application;

[0052] FIG7 a is a schematic diagram of the three-dimensional structure of a synchronous belt tensioning device provided in an embodiment of the present application;

[0053] FIG7 b is a front view of a synchronous belt tensioning device provided in an embodiment of the present application;

[0054] FIG7c is a top view of the synchronous belt tensioning device provided in an embodiment of the present application;

[0055] FIG8 is another planar structural schematic diagram of a partial structure of the synchronous belt tensioning device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application.

[0057] 2 , which is a schematic diagram of a 3D printing system according to an embodiment of the present invention, as shown in FIG2 , a 3D printing system 20 includes a feeding device 201 and a 3D printer 202 connected to the feeding device 201 .

[0058] The feeding device 201 can hold a material tray with printing material wound around it. The feeding device 201 can provide the printing material to the 3D printer 202, or the printing material can be rewound back onto the material tray through the feeding device 201. In other words, the feeding device 201 can both feed and return material. For example, the feeding device 201 can also identify material information of the printing material and transmit the material information to the 3D printer 202.

[0059] The 3D printer 202 includes a print head 2021, which includes a material guide unit 20211, a nozzle 20212, and an extrusion assembly disposed between the material guide unit 20211 and the nozzle 20212. During material feeding from the feeder 201, the printing material passes through the material guide unit 20211 and then enters the extrusion assembly, which delivers the printing material to the nozzle 20212. During material withdrawal from the feeder 201, the 3D printer 202 cuts the printing material in the print head 2021, and the extrusion assembly delivers the printing material to the feeder 201.

[0060] Optionally, the 3D printer 202 may, for example, cut the printing material between the extrusion assembly and the nozzle 20212 or may cut the printing material in the extrusion assembly, etc. This application does not limit the position where the 3D printer cuts the printing material.

[0061] Illustratively, the 3D printer 202 also includes a print panel 2023, a heated bed 2024, a base 2025a, and a slider 2029a. The heated bed 2024 is located on the side of the base 2025a facing the nozzle 20212 and has a heating function. The print panel 2023 is located on the side of the heated bed 2024 facing the nozzle 20212. Heat from the heated bed 2024 is transferred to the print panel 2023, and the nozzle 20212 extrude molten printing material onto the print panel 2023. Optionally, the 3D printer 202 also includes a base 2025b and a slider 2029b.

[0062] In a specific implementation, the 3D printer can adjust the temperature of the nozzle 20212 and the heated bed 2024. The temperature of the nozzle 20212 is adjusted to heat the printing material to a molten state, and the temperature of the heated bed 2024 is adjusted to adhere the printing material extruded by the nozzle 20212 to the printing panel 2023. The print head 2021 is slidably connected to the first guide rail 2026 and can move along the length of the first guide rail 2026, thereby achieving displacement of the print head 2021 relative to the printing panel 2023 along the length of the first guide rail 2026. The heated bed 2024 is slidably connected to the second guide rail 2027 and can move along the length of the second guide rail 2027, thereby achieving displacement of the print head 2021 relative to the printing panel 2023 along the length of the second guide rail 2027. The length of the second guide rail 2027 is perpendicular to the length of the first guide rail 2026. Furthermore, the first guide rail 2026 is slidably connected to the third guide rail 2028. By moving the first guide rail 2026 along the third guide rail 2028, the 3D printer 202 can achieve displacement of the print head 2021 relative to the print panel 2023 in a direction perpendicular to the length of the second guide rail 2027 and in a direction perpendicular to the length of the first guide rail 2026. In other words, the 3D printer 202 can achieve three mutually perpendicular printing paths to print a three-dimensional object.

[0063] In some feasible embodiments, a driving wheel is provided on the base 2025b, and a driven wheel is provided on the print head 2021. A timing belt is wound around the driving wheel and the driven wheel. The timing belt is provided with a slider connected to the print head 2021, which can move the print head 2021 relative to the print panel 2023 along the length of the first guide rail 2026. The timing belt is equipped with a timing belt tensioning device.

[0064] Alternatively, a driving wheel and a driven wheel are provided in the base 2025a, wherein a synchronous belt is wound around the driving wheel and the driven wheel, and the synchronous belt is provided with a slider connected to the hot bed 2024, which can drag the hot bed 2024 to move along the length direction of the second guide rail 2027. The synchronous belt is equipped with a synchronous belt tensioning device.

[0065] The synchronous belt tensioning device provided by this application specifically sets a tensioning block for the driven pulley, through which the distance between the driven pulley and the driving pulley can be adjusted, thereby adjusting the tension of the synchronous belt. Compared with using a tensioning pulley, this application can complete the tensioning of the synchronous belt with a smaller space occupation.

[0066] The structure of the synchronous belt tensioning device will be described in detail below with reference to FIG. 3 a to FIG. 8 .

[0067] Referring to Figure 3a, Figure 3a is a schematic diagram of a planar structure of a synchronous belt tensioning device provided in an embodiment of the present application. The synchronous belt tensioning device shown in Figure 3a includes a frame 1, a tensioning block 3, a driving wheel 9, a driven wheel 6 and a motor 8; wherein,

[0068] The motor 8 is fixedly connected to the frame 1 , the motor shaft of the motor 8 is connected to the driving wheel 9 , and the driving wheel 9 and the driven wheel 6 are connected via a synchronous belt 10 .

[0069] One end of the tensioning block 3 is fixedly connected to the frame 1, and the other end of the tensioning block 3 is provided with an adjustment hole 4, and the adjustment hole 4 is used to adjust the position of the tensioning block 3 relative to the frame 1;

[0070] In addition, the tensioning block 3 is also connected to the driven shaft of the driven wheel 6 between one end fixedly connected to the frame 1 and the adjustment hole 4. The tensioning block 3 is used to change the distance between the driven wheel 6 and the driving wheel 9 when the position of the tensioning block 3 relative to the frame 1 is different.

[0071] For example, as shown in FIG3a , the frame 1 may be provided with a motor base 7, on which a motor 8 may be provided; the motor shaft of the motor 8 may be connected to a driving wheel 9 to drive the driving wheel 9 to rotate. The frame 1 may also be provided with a driven wheel 6 that matches the driving wheel 9. A timing belt 10 is wound around the driving wheel 9 and the driven wheel 6. The timing belt 10 is provided with a connecting component 31 for connecting to other components that need to be moved (e.g., a print head, a heated bed, etc.); the connecting component 31 may optionally be a slider.

[0072] In the embodiment of the present application, the tensioning of the synchronous belt 10 can be achieved by changing the position of the driven wheel 6 ; specifically, the position of the driven wheel 6 can be changed by adjusting the position of the tensioning block 3 connected to the driven shaft of the driven wheel 6 .

[0073] Among them, one end of the tensioning block 3 can be fixed on the frame 1, and the tensioning block 3 can rotate around the fixed point; it can be understood that the fixed connection can be a fixed relative position between the two objects, but the two objects can rotate relative to each other. The other end of the tensioning block 3 can be provided with an adjustment hole 4 for adjusting the position of the tensioning block 3 relative to the frame 1; specifically, when the synchronous belt 10 needs to be tensioned, the tensioning block 3 can be moved from the position shown in Figure 3a to the position shown in Figure 3b, and the driven wheel 6 is farther away from the driving wheel 8. At this time, the synchronous belt 10 is in a tensioned state; in order to maintain the tension of the synchronous belt, a connecting component can be used, such as the set screw 5 in Figure 3b, to pass the set screw 5 through the adjustment hole 4 and screw it into the frame 1, thereby fixing the two ends of the tensioning block 3 to the frame 1 respectively, so as to prevent the tensioning block 3 from moving and causing the synchronous belt 10 to become loose again.

[0074] Optionally, the driven shaft of the driven wheel 6 is connected to any position between one end of the frame 1 and the tensioning block 3 fixedly connected to the adjustment hole 4. The embodiment of the present application does not limit the specific positional relationship between the driven wheel 6 and the tensioning block 3.

[0075] By implementing the embodiment of the present application, the synchronous belt 10 can be tensioned by changing the position of the driven wheel 6; and compared with the prior art of tensioning with a tensioning wheel, the present application occupies less space.

[0076] In some feasible embodiments, as shown in FIG4 , the frame 11 is provided with a plurality of fixing holes 13 along the direction of movement of the synchronous belt 12 , and the plurality of fixing holes 13 are used to fix the other end of the tensioning block after the position of the tensioning block relative to the frame 11 is adjusted to a preset position.

[0077] Optionally, multiple fixing holes 13 matching the adjustment holes can be provided on the frame 11 in the direction of movement of the synchronous belt 12. After the tensioning block is adjusted to a preset position, a set screw can be passed through the adjustment hole and screwed into one of the multiple fixing holes 13 to secure the other end of the tensioning block to the frame 11, thereby completing the tensioning of the synchronous belt 12. The number of fixing holes and the spacing between the fixing holes can be set according to actual conditions and are not limited in this embodiment of the present application.

[0078] In some feasible implementations, the adjustment hole may be an arc-shaped hole, which may also be called a waist-shaped hole.

[0079] Optionally, there is still a certain gap between the multiple fixing holes. When there is no corresponding fixing hole at the preset position, it may cause excessive tension or insufficient tension. In this case, the adjustment hole can be set to an arc hole to provide a preset moving space for the driven wheel. During the stage of adjusting the tension of the synchronous belt, the tightening component can fix the tensioning block within the aperture of the waist-shaped hole, thereby fixing the position of the driven wheel and completing the adjustment of the tension of the synchronous belt.

[0080] In some feasible implementations, as shown in FIG5 , a screw anti-rotation pad 15 may be provided on the adjustment hole 14; the set screw 16 may pass through the screw anti-rotation pad 15 and the adjustment hole 14 in sequence, and then be screwed into the fixing hole provided on the frame 1; by implementing the embodiment of the present application, it is possible to prevent the set screw from moving in the adjustment hole, causing the tensioning block to move, and then causing the tensioned synchronous belt to loosen again; it is also possible to prevent the set screw from loosening due to the vibration generated during the operation of the 3D printer.

[0081] In the embodiment of the present application, the screw anti-rotation pad can be a component with a certain thickness and an anti-slip structure on the side facing the screw head of the set screw, or it can be other structures with screw anti-rotation, and the embodiment of the present application does not limit this.

[0082] In some feasible embodiments, as shown in Figure 6a, the synchronous belt tensioning device may further include: a torsion spring 17, one end of which is connected to the tensioning block 18; a torsion spring limiting screw 20 is provided on the frame 19, and the torsion spring limiting screw 20 is used to suspend the other end of the torsion spring 17.

[0083] The tensioning of the synchronous belt can be achieved by manually adjusting the position of the tensioning block, but it is difficult to control the accuracy of manual adjustment. In order to improve the accuracy of tensioning, a torsion spring 17 can be provided in the embodiment of the present application. The torsion spring 17 can be a torsion spring that is pre-designed based on the actual scenario and can provide a certain elastic force. By twisting the torsion spring 17, a more precise force can be provided to the tensioning block 18 to complete the tensioning of the synchronous belt 21.

[0084] Specifically, one end of the torsion spring can be connected to one end or the other end of the tensioning block, or it can be connected to a position between the two ends of the tensioning block. The embodiment of the present application does not limit this; as shown in Figure 6a, the torsion spring 17 is connected to one end of the tensioning block 18.

[0085] When the torsion spring 17 is twisted, the tensioning block 18 can rotate; at this time, the position of the driven wheel 22 will change, and the driven wheel 22 with the changed position will apply tensioning force to the synchronous belt 21, thereby completing the tensioning of the synchronous belt 21.

[0086] A torsion spring limiting screw 20 may be provided on the frame 19. After operating the torsion spring 17, the other end of the torsion spring 17 may be hung on the torsion spring limiting screw 20, as shown in FIG6b, to further maintain the stability of the tensioning block 18 and prevent the tensioning block 18 from moving due to the elastic force of the synchronous belt 21.

[0087] While the other end of the torsion spring 17 is hung on the torsion spring limit screw 20 , the set screw 23 can be sequentially passed through the screw anti-rotation pad 24 and the adjustment hole 25 and screwed into the fixing hole on the frame 19 .

[0088] In some feasible implementations, one end of the tensioning block 18 is fixedly connected to the frame via a fixed shaft, and one end of the torsion spring 17 is connected to the fixed shaft.

[0089] Optionally, one end of the torsion spring can extend into a slot corresponding to the fixed shaft, and the fixed shaft passes through one end of the torsion spring. When the elastic force of the torsion spring is changed, the force is transmitted to the tensioning block through the fixed shaft, causing the tensioning block to move. And because one end of the tensioning block is fixed, the tensioning block will rotate around the fixed end under the force. That is, by implementing the embodiment of the present application, the magnitude of the synchronous belt tensioning force can be controlled by controlling the elastic force of the torsion spring. The elastic force of the torsion spring can be achieved by using torsion springs with different elastic coefficients or by changing the position of the torsion spring limit screw suspended at the other end of the torsion spring.

[0090] In some feasible embodiments, the synchronous belt tensioning device further includes a shaft screw and a shaft nut: wherein, the shaft screw, one end of the shaft screw is fixed to the frame of the 3D printer, and the other end of the shaft screw passes through the first end of the tensioning block and protrudes from the surface of one end of the tensioning block; the shaft nut is threadedly connected to the portion of the shaft screw protruding from the surface of one end of the tensioning block.

[0091] In an embodiment of the present application, one end of the shaft screw can be fixed to the frame; the other end of the shaft screw can protrude from the surface of one end of the tensioning block and be threadedly connected to the shaft nut. When the synchronous belt needs to be tensioned, the shaft nut and shaft screw can be unscrewed first; after the adjustment is completed, the shaft screw can be screwed back into the shaft screw. By implementing this embodiment of the present application, the synchronous belt tensioning device can be flexibly installed and removed.

[0092] In some feasible embodiments, as shown in Figure 6c, the shaft screw 26 and the shaft nut 27 can be specifically fixed at one end of the tensioning block 18, and the other end of the tensioning block 18 is provided with an adjustment hole 25, and the adjustment hole 25 is provided with a screw anti-rotation pad 24; the tensioning block 18 is also connected to the driven shaft of the driven wheel 22 between one end of the fixed connection frame and the adjustment hole 25; the torsion spring 17 is specifically fixedly connected to the shaft screw 26.

[0093] In some feasible embodiments, Figure 7a is a schematic diagram of the three-dimensional structure of the synchronous belt tensioning device provided in an embodiment of the present application, Figure 7b is a front view of the synchronous belt tensioning device provided in an embodiment of the present application, and Figure 7c is a top view of the synchronous belt tensioning device provided in an embodiment of the present application.

[0094] A motor base 103 may be provided on the frame 105; a motor 101 may be provided on the motor base 103, and a motor shaft of the motor 101 may be connected to the driving wheel 102. A driven wheel 111 is provided at the other end of the frame 105; the driving wheel 102 and the driven wheel 111 are connected by a synchronous belt 104, and a connecting component 114 is provided on the synchronous belt 104 for connecting other components, such as a print head, a heated bed, etc.

[0095] A tension block 110 is installed for the driven pulley 111. One end of the tension block 110 is fixed to the frame 105 via a shaft screw 108 and a shaft nut 109. The other end of the tension block 110 is fixed to the frame 105 via an adjustment hole 115 and a set screw 113. A screw anti-rotation washer 112 is installed in the adjustment hole 115. The driven pulley 111 is positioned on the tension block 110 between the end where the shaft screw 108 is located and the end where the adjustment hole 115 is located. The tension block 110 is also fixedly connected to one end of the torsion spring 106, the other end of which is attached to the torsion spring limit screw 107.

[0096] In some feasible implementations, a slider is provided on the synchronous belt, and the slider is connected to the print head of the 3D printer.

[0097] In an embodiment of the present application, the aforementioned timing belt tensioning device can be used to tension a timing belt corresponding to a print head. Specifically, the timing belt can be provided with a slider connected to the print head of a 3D printer. When the timing belt corresponding to the print head needs to be tensioned, the position of the tensioning block can be adjusted, thereby changing the position of the driven wheel corresponding to the print head, thereby tensioning the timing belt of the print head. By implementing an embodiment of the present application, the position of the driven wheel can be adjusted by moving the tensioning block, thereby tensioning the timing belt corresponding to the print head.

[0098] In some other feasible implementations, a slider is provided on the synchronous belt, and the slider is connected to the hot bed of the 3D printer.

[0099] In an embodiment of the present application, the aforementioned synchronous belt tensioning device can be used to tension a synchronous belt corresponding to a heated bed. Specifically, the synchronous belt can be provided with a slider connected to the heated bed of a 3D printer. When the synchronous belt corresponding to the heated bed needs to be tensioned, the position of the tensioning block can be adjusted, thereby changing the position of the driven pulley corresponding to the heated bed, thereby completing the tensioning of the synchronous belt of the heated bed. In implementing an embodiment of the present application, by moving the tensioning block, the position of the driven pulley can be adjusted, thereby tensioning the synchronous belt corresponding to the heated bed.

[0100] In yet other feasible embodiments, the synchronous belt may include a first synchronous belt and a second synchronous belt, wherein the first synchronous belt is provided with a first slider, and the second synchronous belt is provided with a second slider; wherein the first slider is connected to the print head of the 3D printer, and the second slider is connected to the heated bed of the 3D printer. By implementing the embodiments of the present application, the synchronous belts of the heated bed and the print head of the 3D printer can be tensioned while occupying a relatively small space.

[0101] In some feasible implementations, the synchronous belt tensioning device may further include an accelerometer disposed on the slider. The accelerometer may be used to measure the acceleration of the slider to provide data support for the input shaping algorithm of the synchronous belt.

[0102] In some feasible embodiments, the synchronous belt tensioning device may further include: a coil and a resonance unit, the coil is connected to the resonance unit, the movement direction of the slider is perpendicular to the plane where the coil is located, and the slider is within the magnetic field range of the coil.

[0103] In an embodiment of the present application, to reduce the cost of measuring slider acceleration, acceleration can be measured using a coil and a resonance unit. Specifically, as shown in FIG8 , a coil 28 can be connected to a resonance unit 29 . The plane of the coil 28 can be perpendicular to the direction of movement of the slider 30 , and the slider 30 is within the magnetic field of the coil 28 . Thus, when the slider 30 moves within the magnetic field of the coil 28 , the slider 30 affects the magnetic field of the coil 28 . Based on the changes in the magnetic field of the coil 28 , the acceleration of the slider 30 can be measured.

[0104] The specific positions of the coil and the resonance unit can be set according to actual conditions; optionally, the coil and the resonance unit can be set on a base corresponding to the slider, which is not limited in the embodiment of the present application.

[0105] It should be noted that the above terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0106] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A synchronous belt tensioning device for a 3D printer, characterized in that: The synchronous belt tensioning device comprises a frame, a tensioning block and only two rotating parts; wherein the two rotating parts comprise a first rotating part and a second rotating part; The first rotating member and the second rotating member are connected by a synchronous belt; One end of the tension block is connected to the frame, and the other end of the tension block is rotatable around the end connected to the frame; Furthermore, the tension block is also connected to the rotating shaft of the first rotating member between one end connected to the frame and the other end.

2. The synchronous belt tensioning device according to claim 1, characterized in that: The 3D printer further comprises a motor, and the motor is connected to the frame; The motor shaft of the motor is connected to the first rotating member, the first rotating member is a driving wheel, and the second rotating member is a driven wheel; Alternatively, the motor shaft of the motor is connected to the second rotating member, the second rotating member is a driving wheel, and the first rotating member is a driven wheel.

3. The synchronous belt tensioning device according to any one of claims 1 to 2, characterized in that: Also includes: A torsion spring, one end of which is connected to the tensioning block; The frame is provided with a torsion spring limiting component, and the torsion spring limiting component is used to be connected with the other end of the torsion spring.

4. The synchronous belt tensioning device according to claim 3, characterized in that: One end of the tension block is connected to the frame via a fixed shaft; One end of the torsion spring is connected to the tension block, comprising: One end of the torsion spring is connected to the fixed shaft.

5. The synchronous belt tensioning device according to any one of claims 1 to 2, characterized in that: An adjustment hole is provided at the other end of the tension block, and the center of the adjustment hole is located on the same straight line as the end of the tension block connected to the frame.

6. The synchronous belt tensioning device according to any one of claims 1 to 2, characterized in that: The frame is provided with a plurality of fixing holes along the moving direction of the synchronous belt.

7. The synchronous belt tensioning device according to claim 5, characterized in that: The adjusting hole is an arc-shaped hole.

8. The synchronous belt tensioning device according to claim 7, characterized in that: The adjusting hole is provided with a screw anti-rotation pad.

9. The synchronous belt tensioning device according to any one of claims 1 to 8, characterized in that: The synchronous belt tensioning device also includes a rotating shaft screw and a rotating shaft nut; One end of the tensioning block is connected to the frame, and includes: One end of the shaft screw is fixed to the frame of the 3D printer, and the other end of the shaft screw passes through one end of the tension block and protrudes from the surface of one end of the tension block; The portion of the surface of the rotating shaft screw protruding from one end of the tensioning block is connected in a threaded manner.

10. The synchronous belt tensioning device according to any one of claims 1 to 9, characterized in that: A slider is provided on the synchronous belt, and the slider is connected to the print head of the 3D printer.

11. The synchronous belt tensioning device according to any one of claims 1 to 9, characterized in that: The synchronous belt is provided with a slider, and the slider is connected to the hot bed of the 3D printer.

12. A 3D printer, characterized in that: The 3D printer comprises a synchronous belt and a synchronous belt tensioning device as claimed in any one of claims 1 to 11.

13. A 3D printing system, characterized in that: It comprises a feeding device and the 3D printer as claimed in claim 12; wherein the feeding device is connected to the 3D printer.

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