Motion device and 3D printer

Abstract

The present application relates to the field of 3D printing, and in particular relates to a motion device and a 3D printer. The motion device comprises: a first transmission belt, extending in a first direction; a second transmission belt, extending in the first direction; a third transmission belt, extending in a second direction perpendicular to the first direction, a first end of the third transmission belt being in transmission connection with the first transmission belt, and a second end of the third transmission belt being in transmission connection with the second transmission belt; an output component, which is fixed to the third transmission belt. The third transmission belt is such configured that when the first transmission belt and the second transmission belt rotate in the same direction, the third transmission belt drives the output component to move in the second direction, and when the first transmission belt and the second transmission belt rotate in opposite directions, the third transmission belt drives the output component to move in the first direction. The present application can relieve the problem of slackness of transmission belts after long-term use and thus improve the motion accuracy of output components, thereby improving printing accuracy and model quality.

Description

Motion device and 3D printer

[0001] The present application claims priority to the Chinese Patent Application No. 202410733870.3, filed on June 6, 2024, and titled "A Motion Device and 3D Printer", and the Chinese Patent Application No. 202421289262.X, filed on June 6, 2024, and titled "A Transmission Device and 3D Printer", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of 3D printing, and in particular, to a motion device and 3D printer. BACKGROUND

[0003] Fused Deposition Modeling (FDM) is a technology for building a 3D model by depositing a consumable in a molten state layer by layer. Therefore, a 3D printer based on Fused Deposition Modeling (FDM) technology usually needs to set a transmission member to transmit the power of a driving assembly to a nozzle assembly or a printing platform assembly, so that the nozzle assembly or the printing platform assembly moves to realize printing. In the related art, a belt is often used as a transmission member to transmit the power of a driving assembly to other assemblies. However, after a long time of work, the belt transmission member is prone to slack, so that the power of the driving assembly cannot be effectively transmitted to other assemblies, resulting in a decrease in the printing accuracy of the 3D printer and affecting the quality of the 3D printed model. SUMMARY

[0004] One embodiment of the present application provides a motion device that can effectively improve the movement accuracy of an output assembly, thereby improving the printing accuracy and the quality of the model.

[0005] In a first aspect, one embodiment of the present application provides a motion device, comprising:

[0006] a first transmission belt extending in a first direction;

[0007] a second transmission belt extending in the first direction;

[0008] a third transmission belt extending in a second direction perpendicular to the first direction, the third transmission belt having a first end and a second end in the second direction, the first end of the third transmission belt being transmissionally connected to the first transmission belt, and the second end of the third transmission belt being transmissionally connected to the second transmission belt; and

[0009] an output assembly fixed to the third transmission belt.

[0010] The third transmission belt is configured to,

[0011] In the case that the first transmission belt and the second transmission belt rotate in the same direction, the third transmission belt drives the output assembly to move in the second direction;

[0012] In the case that the first transmission belt and the second transmission belt rotate in opposite directions, the third transmission belt drives the output assembly to move in the first direction.

[0013] In some embodiments, at least one of the first transmission belt, the second transmission belt and the third transmission belt is a closed loop belt.

[0014] In some embodiments, in the case that the first transmission belt and the second transmission belt rotate in the same direction, the third transmission belt follows the first transmission belt and the second transmission belt to rotate in the same direction, and drives the output assembly to move in the second direction in a forward direction;

[0015] In the case that the first transmission belt and the second transmission belt rotate in opposite directions, the third transmission belt follows the first transmission belt and the second transmission belt to rotate in the opposite directions, and drives the output assembly to move in the second direction in a reverse direction;

[0016] In the case that the first transmission belt rotates in the clockwise direction while the second transmission belt rotates in the counterclockwise direction, the third transmission belt does not rotate, and drives the output assembly to move in the first direction in a forward direction;

[0017] In the case that the first transmission belt rotates in the counterclockwise direction while the second transmission belt rotates in the clockwise direction, the third transmission belt does not rotate, and drives the output assembly to move in the first direction in a reverse direction.

[0018] In some embodiments, the motion device further comprises a first synchronous wheel and a second synchronous wheel;

[0019] The first synchronous wheel is engaged with a first end of the third transmission belt and engaged with the first transmission belt, and the first synchronous wheel is configured to transmit power of the first transmission belt to the third transmission belt;

[0020] The second synchronous wheel is engaged with a second end of the third transmission belt and engaged with the second transmission belt, and the second synchronous wheel is configured to transmit power of the second transmission belt to the third transmission belt.

[0021] In some embodiments, the motion device further comprises a first slide rod and a second slide rod extending along the first direction respectively and fixed in position relative to each other, a first slide connected to the first slide rod, and a second slide connected to the second slide rod;

[0022] The first synchronous wheel is rotatably connected to the first slide, and the second synchronous wheel is rotatably connected to the second slide.

[0023] In some embodiments, the motion device further comprises a first tensioning wheel and a second tensioning wheel;

[0024] The first tensioning wheel is rotatably connected to the first slide for pressing the first transmission belt against the first synchronous wheel;

[0025] The second tensioning wheel is rotatably connected to the second slide for pressing the second transmission belt against the second synchronous wheel.

[0026] In some embodiments, the motion device comprises two first tensioning wheels symmetrically arranged on two sides of the first synchronous wheel in the first direction;

[0027] The motion device comprises two second tensioning wheels symmetrically arranged on two sides of the second synchronous wheel in the first direction.

[0028] In some embodiments, the motion device further comprises at least one connecting rod extending along the second direction, one end of the connecting rod being fixed to the first slide in the second direction, and the other end of the connecting rod being fixed to the second slide in the second direction;

[0029] The output component is slidably connected to the connecting rod.

[0030] In some embodiments, the motion device comprises two connecting rods spaced apart in the first direction, and the third transmission belt is arranged between the two connecting rods.

[0031] In some embodiments, the motion device further comprises a first tensioning assembly, the first tensioning assembly comprising a fixed seat and a pressing block connected to the fixed seat, the fixed seat being fixed to the third transmission belt, and the pressing block being configured to abut the third transmission belt in a direction having an included angle with the second direction to tension the third transmission belt.

[0032] In some embodiments, the first tensioning assembly is fixed with the output component.

[0033] In some embodiments, the fixing base is provided with an assembly slot and a tensioning slot, the assembly slot extends through the fixing base along the second direction, and the tensioning slot is an arc-shaped slot and is communicated with the assembly slot;

[0034] The third transmission belt is arranged in the assembly slot;

[0035] The pressing block is configured to press the third transmission belt arranged in the assembly slot into the tensioning slot, so as to fix the first tensioning assembly to the third transmission belt and tension the third transmission belt.

[0036] In some embodiments, the first tensioning assembly further comprises a first rotating shaft and a fastener;

[0037] The first rotating shaft is arranged eccentrically relative to the tensioning slot, and the pressing block is rotatably connected to the fixing base through the first rotating shaft;

[0038] The fastener is threadedly connected with the fixing base, and the fastener is configured to fix the pressing block to the fixing base.

[0039] In some embodiments, the pressing block comprises a connecting portion and a pressing portion extending from the connecting portion, the pressing portion and the connecting portion are arranged at an angle, and the first rotating shaft is connected to a connecting position of the connecting portion and the pressing portion;

[0040] The fastener is configured to press the connecting portion to the fixing base;

[0041] In the case that the fastener presses the connecting portion to the fixing base, the pressing portion is configured to press the third transmission belt arranged in the assembly slot into the tensioning slot.

[0042] In some embodiments, the motion device further comprises a first driving assembly and a second driving assembly;

[0043] The first driving assembly is drivingly connected to the first transmission belt to drive the first transmission belt to rotate.

[0044] The second driving assembly is drivingly connected to the second transmission belt to drive the second transmission belt to rotate.

[0045] In some embodiments, the first driving assembly comprises a first driving portion and a first driving wheel fixed to an output end of the first driving portion, and the first transmission belt has a first end and a second end in the first direction, and the first end of the first transmission belt is engaged with the first driving wheel;

[0046] The second driving assembly comprises a second driving part and a second driving wheel fixed to an output end of the second driving part; the second transmission belt has a first end and a second end in the first direction, and the first end of the second transmission belt is engaged with the second driving wheel.

[0047] In some embodiments, the motion device further comprises a base, a first driven wheel and a second driven wheel;

[0048] The first driving part and the second driving part are respectively fixed to the base;

[0049] The first driven wheel is rotatably connected to the base and is drivingly connected to the second end of the first transmission belt;

[0050] The second driven wheel is rotatably connected to the base and is drivingly connected to the second end of the second transmission belt.

[0051] In some embodiments, the motion device further comprises two second tensioning assemblies, one of which is used to tension the first transmission belt and the other of which is used to tension the second transmission belt;

[0052] The second tensioning assembly comprises a pulling block and an elastic part, one end of the pulling block in the second direction is rotatably connected to the base, the other end of the pulling block in the second direction is rotatably connected to the first driven wheel or the second driven wheel, and the elastic part is compressed between the base and the pulling block along the first direction to tension the first transmission belt or the second transmission belt.

[0053] In some embodiments, the pulling block is provided with a guide limiting hole, and the base is fixed with a first limiting part slidingly connected to the guide limiting hole.

[0054] In a second aspect, one embodiment of the present application provides a 3D printer, comprising the above motion device.

[0055] Compared with the prior art, the beneficial features of the embodiment of the application are that the motion device and the 3D printer comprise a first transmission belt extending in a first direction, a second transmission belt extending in the first direction, a third transmission belt extending in a second direction perpendicular to the first direction, the third transmission belt having a first end and a second end in the second direction, the first end of the third transmission belt being in transmission connection with the first transmission belt, the second end of the third transmission belt being in transmission connection with the second transmission belt, and an output assembly fixed to the third transmission belt. In the case that the first transmission belt and the second transmission belt rotate in the same direction, the third transmission belt drives the output assembly to move in the second direction; in the case that the first transmission belt and the second transmission belt rotate in opposite directions, the third transmission belt drives the output assembly to move in the first direction. Not only can the output assembly be effectively driven to move in the first direction and the second direction, but also the length of a single transmission belt can be shortened, the problem of relaxation of the transmission belt after long-time use can be improved, the movement precision of the output assembly is improved, and the printing precision and the model quality are improved. BRIEF DESCRIPTION OF DRAWINGS

[0056] Fig. 1 is a perspective view of a motion device according to an embodiment of the application;

[0057] Fig. 2 is a front view of a partial structure of the motion device shown in Fig. 1;

[0058] Fig. 3 is an enlarged view of a partial structure A of Fig. 2;

[0059] Fig. 4 is a right view of Fig. 2;

[0060] Fig. 5 is an enlarged view of a partial structure B of Fig. 4;

[0061] Fig. 6 is another view of a partial structure of the motion device shown in Fig. 1;

[0062] Fig. 7 is an enlarged view of a partial structure C of Fig. 6;

[0063] Fig. 8 is an enlarged view of a first tensioning assembly structure in Fig. 7;

[0064] Fig. 9 is another view of the motion device shown in Fig. 1;

[0065] Fig. 10 is an enlarged view of a partial structure D of Fig. 9;

[0066] Fig. 11 is an enlarged view of a partial structure E of Fig. 9;

[0067] Fig. 12 is another view of a second tensioning assembly in Fig. 11;

[0068] Fig. 13 is another view of Fig. 12;

[0069] Fig. 14 is a top view of the second tensioning assembly in Fig. 11;

[0070] Fig. 15 is a F-F sectional view of Fig. 14;

[0071] Wherein: 1 - first transmission belt (1a - first end of first transmission belt, 1b - second end of first transmission belt, 1c - first side of first transmission belt, 1d - second side of first transmission belt), 2 - second transmission belt (2a - first end of second transmission belt, 2b - second end of second transmission belt, 2c - first side of second transmission belt, 2d - second side of second transmission belt), 3 - third transmission belt (3a - first end of third transmission belt, 3b - second end of third transmission belt, 3c - first side of third transmission belt, 3d - second side of third transmission belt), 4 - output assembly, 5 - first synchronous wheel, 6 - second synchronous wheel, 7 - first slide rod, 8 - second slide rod, 9 - first slide block, 10 - second slide block, 11 - first compression wheel, 12 - second compression wheel, 13 - connecting rod, 14 - first drive assembly (1401 - first drive part, 1402 - first driving wheel), 15 - second drive assembly (1501 - second drive part, 1502 - second driving wheel), 16 - base (1601 - first limiting part (16011 - flange body), 1602 - support surface, 1603 - third limiting part), 17 - first driven wheel, 18 - second driven wheel, 19 - first tensioning assembly (1901 - fixed seat (19011 - assembly groove, 19012 - tensioning groove, 19013 - mounting groove (190131 - first surface, 190132 - second surface), 19014 - assembly hole), 1902 - pressing block (19021 - connecting part (L1 - length of connecting part), 19022 - compression part (L2 - length of compression part), 19023 - locking hole), 1903 - first rotating shaft), 20 - second tensioning assembly (2001 - pulling block (20011 - mounting hole, 20012 - second limiting part, 20013 - annular limiting groove, 20014 - guide limiting hole), 2002 - second rotating shaft, 2003 - elastic part (20031 - first end, 20032 - second end)). DETAILED DESCRIPTION

[0072] For the purpose of facilitating the understanding of the present application, a more complete understanding of the present application can be had by reference to the relevant drawings. The preferred embodiments of the present application are illustrated in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0073] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. Where, when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present.

[0074] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0075] Referring to FIGS. 1-3, the motion device according to embodiments of the present application includes a first transmission belt 1, a second transmission belt 2, a third transmission belt 3, and an output assembly 4. The first transmission belt 1 extends in a first direction, the second transmission belt 2 extends in the first direction, and the third transmission belt 3 extends in a second direction perpendicular to the first direction. The third transmission belt 3 has a first end 3a and a second end 3b in the second direction. The first end 3a of the third transmission belt 3 is drivingly connected to the first transmission belt 1, and the second end 3b of the third transmission belt 3 is drivingly connected to the second transmission belt 2. The output assembly 4 is fixed to the third transmission belt 3. The third transmission belt 3 is configured to drive the output assembly 4 to move in the second direction when the first transmission belt 1 and the second transmission belt 2 rotate in the same direction, and to drive the output assembly 4 to move in the first direction when the first transmission belt 1 and the second transmission belt 2 rotate in opposite directions.

[0076] The motion device according to embodiments of the present application includes a first transmission belt 1, a second transmission belt 2, a third transmission belt 3, and an output assembly 4. The third transmission belt 3 drives the output assembly 4 to move in the second direction when the first transmission belt 1 and the second transmission belt 2 rotate in the same direction. The third transmission belt 3 drives the output assembly 4 to move in the first direction when the first transmission belt 1 and the second transmission belt 2 rotate in opposite directions. The embodiments of the present application not only effectively drive the output assembly 4 to move in the first direction and the second direction, but also shorten the length of the single transmission belt, i.e., the length of the first transmission belt 1, the second transmission belt 2, and the third transmission belt 3, thereby improving the problem of loosening of the transmission belt after a long time of use, improving the movement precision of the output assembly 4, and further improving the printing precision and the model quality.

[0077] In some embodiments, the output assembly 4 can be a nozzle assembly. The first direction can be the Z direction, and the second direction can be the X direction.

[0078] In some embodiments, the output assembly 4 can be a printing platform assembly. The first direction can be the X direction, and the second direction can be the Y direction. In some embodiments, the output assembly 4 can be a printing platform assembly. The first direction can be the X direction, and the second direction can be the Y direction.

[0079] In some examples, the first transmission belt 1 and the second transmission belt 2 can have the same structure, and the first transmission belt 1 and the second transmission belt 2 can have the same rotation speed, so that the two ends of the third transmission belt 3 can be balanced, further improving the printing accuracy.

[0080] Optionally, at least one of the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 is a closed loop belt. It can be understood that the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 can all be closed loop belts. Alternatively, any two of the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 can be closed loop belts. Alternatively, any one of the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 can be a closed loop belt.

[0081] In some embodiments, referring to FIG. 2, the first transmission belt 1 is a closed loop belt, the second transmission belt 2 is a closed loop belt, and the third transmission belt 3 is a closed loop belt. In this embodiment, the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 are respectively configured as closed loop belts, so that the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 are less likely to be loose, further improving the service life and transmission accuracy of the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3, thereby improving the movement accuracy of the output assembly 4.

[0082] Referring to FIG. 2, the closed loop belt refers to a belt in a closed loop structure.

[0083] In some embodiments, referring to FIG. 1, the third transmission belt 3 can drive the output assembly 4 to move in the first direction in the forward direction, the third transmission belt 3 can also drive the output assembly 4 to move in the first direction in the reverse direction, the third transmission belt 3 can also drive the output assembly 4 to move in the second direction in the forward direction, and the third transmission belt 3 can also drive the output assembly 4 to move in the second direction in the reverse direction. By controlling the rotation of the first transmission belt 1 and the second transmission belt 2, the movement direction of the output assembly 4 can be effectively controlled, which not only simplifies the structure and facilitates installation, but also improves the movement accuracy of the output assembly 4 and the service life of the movement device.

[0084] In this embodiment, referring to FIGS. 2 and 3, the third transmission belt 3 has a first side 3c in the first direction in the forward direction and a second side 3d in the first direction in the reverse direction. The output assembly 4 is fixed to the first side 3c of the third transmission belt 3. It can be understood that during the rotation of the third transmission belt 3, the first side 3c of the third transmission belt 3 and the second side 3d of the third transmission belt 3 move in opposite directions in the second direction. The first side 3c of the third transmission belt 3 is fixed with the output assembly 4, while the second side 3d of the third transmission belt 3 passes through the output assembly 4, that is, the second side 3d of the third transmission belt 3 can move relative to the output assembly 4 in the second direction.

[0085] In the embodiment, when the first transmission belt 1 rotates clockwise S, and the second transmission belt 2 also rotates clockwise S, the third transmission belt 3 does not change its position in the first direction, and the third transmission belt 3 rotates clockwise S along with the first transmission belt 1 and the second transmission belt 2, thereby driving the output assembly 4 to move forward in the second direction.

[0086] In the embodiment, when the first transmission belt 1 rotates counterclockwise N, and the second transmission belt 2 also rotates counterclockwise N, the third transmission belt 3 does not change its position in the first direction, and the third transmission belt 3 rotates counterclockwise N along with the first transmission belt 1 and the second transmission belt 2, thereby driving the output assembly 4 to move reversely in the second direction.

[0087] In the embodiment, when the first transmission belt 1 rotates clockwise S, and the second transmission belt 2 rotates counterclockwise N, the third transmission belt 3 does not rotate, and the third transmission belt 3 moves forward in the first direction, thereby driving the output assembly 4 to move forward in the first direction.

[0088] In the embodiment, when the first transmission belt 1 rotates counterclockwise N, and the second transmission belt 2 rotates clockwise S, the third transmission belt 3 does not rotate, and the third transmission belt 3 moves reversely in the first direction, thereby driving the output assembly 4 to move reversely in the first direction.

[0089] The above-mentioned movement device can further include a first synchronous wheel 5 and a second synchronous wheel 6, please refer to FIG. 2 to FIG. 5. The first synchronous wheel 5 is engaged with the first end 3a of the third transmission belt 3, and the first synchronous wheel 5 is also engaged with the first transmission belt 1, and the first synchronous wheel 5 is configured to transmit the power of the first transmission belt 1 to the third transmission belt 3. The second synchronous wheel 6 is engaged with the second end 3b of the third transmission belt 3, and the second synchronous wheel 6 is also engaged with the second transmission belt 2, and the second synchronous wheel 6 is configured to transmit the power of the second transmission belt 2 to the third transmission belt 3. The embodiment transmits the power of the first transmission belt 1 to the third transmission belt 3 through the first synchronous wheel 5, and transmits the power of the second transmission belt 2 to the third transmission belt 3 through the second synchronous wheel 6, which is simple in structure and can effectively ensure the movement accuracy of the output assembly 4.

[0090] In some embodiments, referring to FIG. 2 and FIG. 3, the first transmission belt 1 has a first side 1c and a second side 1d arranged oppositely, wherein the first side 1c of the first transmission belt 1 is arranged away from the second transmission belt 2 relative to the second side 1d of the first transmission belt 1. The first synchronous wheel 5 is engaged with the first side 1c of the first transmission belt 1. Similarly, the second transmission belt 2 has a first side 2c and a second side 2d arranged oppositely, wherein the first side 2c of the second transmission belt 2 is arranged away from the first transmission belt 1 relative to the second side 2d of the second transmission belt 2. The second synchronous wheel 6 is engaged with the first side 2c of the second transmission belt 2. The first transmission belt 1 and the second transmission belt 2 are not only structurally identical, but also symmetrically arranged, further improving the movement accuracy of the third transmission belt 3.

[0091] In the present embodiment, referring to FIG. 2, in the case that the first transmission belt 1 rotates clockwise S, and the second transmission belt 2 also rotates clockwise S, the first synchronous wheel 5 rotates clockwise S with the first transmission belt 1, the second synchronous wheel 6 rotates clockwise S with the second transmission belt 2, thereby driving the third transmission belt 3 to rotate clockwise S. At this time, the first side 3c of the third transmission belt 3 moves forward in the second direction, and the second side 3d of the third transmission belt 3 moves reversely in the second direction. Therefore, the output assembly 4 fixed to the first side 3c of the third transmission belt 3 also moves forward in the second direction.

[0092] In the present embodiment, referring to FIG. 2, in the case that the first transmission belt 1 rotates counterclockwise N, and the second transmission belt 2 also rotates counterclockwise N, the first synchronous wheel 5 rotates counterclockwise N with the first transmission belt 1, the second synchronous wheel 6 rotates counterclockwise N with the second transmission belt 2, thereby driving the third transmission belt 3 to rotate counterclockwise N. At this time, the first side 3c of the third transmission belt 3 moves reversely in the second direction, and the second side 3d of the third transmission belt 3 moves forward in the second direction. Therefore, the output assembly 4 fixed to the first side 3c of the third transmission belt 3 also moves reversely in the second direction.

[0093] In the present embodiment, please refer to FIG. 2, in the case that the first transmission belt 1 rotates clockwise S, and the second transmission belt 2 rotates counterclockwise N, the first transmission belt 1 transmits the power rotating clockwise S to the first synchronous wheel 5, and the second transmission belt 2 transmits the power rotating counterclockwise N to the second synchronous wheel 6. Since the first synchronous wheel 5 and the second synchronous wheel 6 are engaged with the third transmission belt 3 at the same time, the first synchronous wheel 5 and the second synchronous wheel 6 cannot rotate in opposite directions, thus the first synchronous wheel 5, the second synchronous wheel 6 and the third transmission belt 3 do not rotate. Since the first synchronous wheel 5 is engaged with the first side 1c of the first transmission belt 1, at this time the first side 1c of the first transmission belt 1 moves forward in the first direction, the non-rotating first synchronous wheel 5 follows the first side 1c of the first transmission belt 1 to move forward in the first direction. Similarly, since the second synchronous wheel 6 is engaged with the first side 2c of the second transmission belt 2, at this time the first side 2c of the second transmission belt 2 moves forward in the first direction, the non-rotating second synchronous wheel 6 follows the first side 2c of the second transmission belt 2 to move forward in the first direction, the third transmission belt 3 moves forward in the first direction with the first synchronous wheel 5 and the second synchronous wheel 6, thus the output assembly 4 fixed to the first side 3c of the third transmission belt 3 also moves forward in the first direction.

[0094] In the present embodiment, please refer to FIG. 2, in the case that the first transmission belt 1 rotates clockwise S, and the second transmission belt 2 rotates counterclockwise N, the first transmission belt 1 transmits the power rotating clockwise S to the first synchronous wheel 5, and the second transmission belt 2 transmits the power rotating counterclockwise N to the second synchronous wheel 6. Since the first synchronous wheel 5 and the second synchronous wheel 6 are engaged with the third transmission belt 3 at the same time, the first synchronous wheel 5 and the second synchronous wheel 6 cannot rotate in opposite directions, thus the first synchronous wheel 5, the second synchronous wheel 6 and the third transmission belt 3 do not rotate. Since the first synchronous wheel 5 is engaged with the first side 1c of the first transmission belt 1, at this time the first side 1c of the first transmission belt 1 moves forward in the first direction, the non-rotating first synchronous wheel 5 follows the first side 1c of the first transmission belt 1 to move forward in the first direction. Similarly, since the second synchronous wheel 6 is engaged with the first side 2c of the second transmission belt 2, at this time the first side 2c of the second transmission belt 2 moves forward in the first direction, the non-rotating second synchronous wheel 6 follows the first side 2c of the second transmission belt 2 to move forward in the first direction, the third transmission belt 3 moves forward in the first direction with the first synchronous wheel 5 and the second synchronous wheel 6, thus the output assembly 4 fixed to the first side 3c of the third transmission belt 3 also moves forward in the first direction.

[0095] It can be understood that in other embodiments, the first synchronous wheel 5 can be engaged with the second side 1d of the first transmission belt 1, and the second synchronous wheel 6 can be engaged with the second side 2d of the second transmission belt 2.

[0096] It can be understood that in other embodiments, the output assembly 4 can be fixed to the second side 3d of the third transmission belt 3.

[0097] Referring to FIG. 1, the above-mentioned movement device can further comprise a first slide rod 7, a second slide rod 8, a first slide base 9 and a second slide base 10. The first slide rod 7 and the second slide rod 8 are fixed in position relative to each other and are parallel to each other, and both extend in the first direction. The first slide base 9 is slidingly connected to the first slide rod 7, and the second slide base 10 is slidingly connected to the second slide rod 8. The first synchronous wheel 5 is rotatably connected to the first slide base 9, and the second synchronous wheel 6 is rotatably connected to the second slide base 10. In this embodiment, the relative fixation of the first slide rod 7 and the second slide rod 8 can effectively limit the distance between the first synchronous wheel 5 and the second synchronous wheel 6, thereby effectively limiting the movement trajectory of the first synchronous wheel 5 and the second synchronous wheel 6, and further improving the movement accuracy of the output assembly 4.

[0098] Referring to FIG. 2, the above-mentioned movement device can further comprise a first compression wheel 11 and a second compression wheel 12. The first compression wheel 11 is rotatably connected to the first slide base 9, and the second compression wheel 12 is rotatably connected to the second slide base 10. The first compression wheel 11 can compress the first transmission belt 1 against the first synchronous wheel 5, so that the first transmission belt 1 and the first synchronous wheel 5 can maintain effective engagement, thereby further improving the movement accuracy of the output assembly 4. The second compression wheel 12 can compress the second transmission belt 2 against the second synchronous wheel 6, so that the second transmission belt 2 and the second synchronous wheel 6 can maintain effective engagement, thereby further improving the movement accuracy of the output assembly 4.

[0099] Referring to FIG. 2 and FIG. 3, the above-mentioned movement device can comprise two first compression wheels 11. The two first compression wheels 11 are respectively connected to the first slide base 9, and each first compression wheel 11 can rotate about its own axis. The two first compression wheels 11 are spaced apart in the first direction, and the two first compression wheels 11 are symmetrically arranged about the first synchronous wheel 5, thereby more effectively compressing the first transmission belt 1 against the first synchronous wheel 5, further improving the movement accuracy. Similarly, referring to FIG. 2 to FIG. 5, the above-mentioned movement device can comprise two second compression wheels 12. The two second compression wheels 12 are respectively connected to the second slide base 10, and each second compression wheel 12 can rotate about its own axis. The two second compression wheels 12 are spaced apart in the first direction, and the two second compression wheels 12 are symmetrically arranged about the second synchronous wheel 6, thereby more effectively compressing the second transmission belt 2 against the second synchronous wheel 6, further improving the movement accuracy.

[0100] In some embodiments, referring to FIG. 3, the first pressing wheel 11 can press the first side 1c of the first transmission belt 1 against the first synchronous wheel 5, so that the first transmission belt 1 and the first synchronous wheel 5 can be kept in effective engagement. The second pressing wheel 12 can press the first side 2c of the second transmission belt 2 against the second synchronous wheel 6, so that the second transmission belt 2 and the second synchronous wheel 6 can be kept in effective engagement. The arrangement of the first pressing wheel 11 and the second pressing wheel 12 can further improve the motion accuracy of the output assembly 4.

[0101] It can be understood that, in other embodiments, the first synchronous wheel 5 can engage the second side 1d of the first transmission belt 1, and correspondingly, the first pressing wheel 11 can press the second side 1d of the first transmission belt 1 against the first synchronous wheel 5. The second synchronous wheel 6 can engage the second side 2d of the second transmission belt 2, and correspondingly, the second pressing wheel 12 can press the second side 2d of the second transmission belt 2 against the second synchronous wheel 6.

[0102] The motion device can further include at least one connecting rod 13, referring to FIG. 1, FIG. 6 and FIG. 7. The connecting rod 13 extends along the second direction, and one end of the connecting rod 13 is fixed to the first sliding seat 9 along the second direction, and the other end of the connecting rod 13 is fixed to the second sliding seat 10 along the second direction. The output assembly 4 is slidingly connected to the connecting rod 13. The connecting rod 13 can support the output assembly 4, and when the output assembly 4 moves along the second direction, the output assembly 4 can slide along the second direction on the connecting rod 13, so that the connecting rod 13 can improve the stability of the motion of the output assembly 4, thereby improving the motion accuracy of the output assembly 4 and the printing accuracy. In addition, the connecting assembly can reduce the pressure applied by the output assembly 4 on the third transmission belt 3, further avoiding the relaxation of the third transmission belt 3, and improving the service life of the third transmission belt 3 and the motion accuracy of the output assembly 4.

[0103] In some embodiments, referring to FIG. 1, FIG. 6 and FIG. 7, the connecting rod 13 can have two. The two connecting rods 13 are arranged at intervals along the first direction, and the third transmission belt 3 is arranged between the two connecting rods 13. The output assembly 4 is slidingly connected to the two connecting rods 13 respectively, avoiding the rotation of the output assembly 4 around the connecting rod 13, and further improving the stability of the output assembly 4, thereby improving the motion accuracy of the output assembly 4 and the printing accuracy.

[0104] Referring to FIG. 1, the motion device can further include a first driving assembly 14 and a second driving assembly 15. The first driving assembly 14 is drivingly connected to the first transmission belt 1, and the first driving assembly 14 is configured to provide power to the first transmission belt 1, thereby driving the first transmission belt 1 to rotate. The second driving assembly 15 is drivingly connected to the second transmission belt 2, and the second driving assembly 15 is configured to provide power to the second transmission belt 2, thereby driving the second transmission belt 2 to rotate.

[0105] Please refer to FIG. 1 and FIG. 2, the first driving assembly 14 can include a first driving part 1401 and a first driving wheel 1402. The first driving wheel 1402 is fixed to the output end of the first driving part 1401. The first transmission belt 1 has a first end 1a and a second end 1b oppositely arranged in the first direction, and the first end 1a of the first transmission belt 1 is engaged with the first driving wheel 1402. The power output by the first driving part 1401 can be transmitted to the first transmission belt 1 through the first driving wheel 1402, thereby driving the first transmission belt 1 to rotate clockwise S or counterclockwise N. The structure is simple, and the first transmission belt 1 can be quickly, effectively and accurately driven.

[0106] Please refer to FIG. 1 and FIG. 2, the second driving assembly 15 includes a second driving part 1501 and a second driving wheel 1502. The second driving wheel 1502 is fixed to the output end of the second driving part 1501. The second transmission belt 2 has a first end 2a and a second end 2b oppositely arranged in the first direction, and the first end 2a of the second transmission belt 2 is engaged with the second driving wheel 1502. The power output by the second driving part 1501 can be transmitted to the second transmission belt 2 through the second driving wheel 1502, thereby driving the second transmission belt 2 to rotate clockwise S or counterclockwise N. The structure is simple, and the second transmission belt 2 can be quickly, effectively and accurately driven.

[0107] The first driving assembly 14 and the second driving assembly 15 can be completely the same. That is, the first driving part 1401 and the second driving part 1501 can be completely the same, and the first driving wheel 1402 and the second driving wheel 1502 can also be completely the same, which is more conducive to the balanced and stable driving of the first transmission belt 1 and the second transmission belt 2 to move the third transmission belt 3.

[0108] As an example, please refer to FIG. 1 and FIG. 9, the first driving part 1401 and the second driving part 1501 can be motors.

[0109] It can be understood that in other embodiments, the first driving part 1401 and the second driving part 1501 can also be other driving devices. The first driving assembly 14 and the second driving assembly 15 can also have other structures, which can be set according to actual conditions, and will not be described here.

[0110] Please refer to FIG. 1, the exercise device can further comprise a base 16. Please refer to FIG. 1, FIG. 2 and FIG. 9-11, the exercise device can further comprise a first driven wheel 17 and a second driven wheel 18. The first driving part 1401 can be fixed to the base 16, the first driven wheel 17 can be rotatably connected to the base 16 around its own axis, and the first driven wheel 17 can be connected to the second end 1b of the first transmission belt 1, so as to effectively limit the first transmission belt 1 on the base 16, further ensuring the stability of the first transmission belt 1. The second driving part 1501 can be fixed to the base 16, the second driven wheel 18 can be rotatably connected to the base 16 around its own axis, and the second driven wheel 18 can be connected to the second end 2b of the second transmission belt 2, so as to effectively limit the second transmission belt 2 on the base 16, further ensuring the stability of the second transmission belt 2.

[0111] It can be understood that, please refer to FIG. 1 and FIG. 9, in the case that the exercise device comprises the first slide rod 7 and the second slide rod 8, the first slide rod 7 can be connected and fixed to the base 16 at both ends in the first direction, and the second slide rod 8 can be connected and fixed to the base 16 at both ends in the first direction, so as to effectively fix the first slide rod 7 and the second slide rod 8 on the base 16, further ensuring the stability of the third transmission belt 3.

[0112] Please refer to FIG. 1 and FIG. 9-11, the exercise device can further comprise two second tensioning assemblies 20. Please refer to FIG. 10, one of the second tensioning assemblies 20 is used for tensioning the first transmission belt 1. Please refer to FIG. 11, the other second tensioning assembly 20 is used for tensioning the second transmission belt 2. In this embodiment, the two second tensioning assemblies 20 can keep the first transmission belt 1 and the second transmission belt 2 in a tensioned state, further improving the transmission accuracy of the exercise device.

[0113] Please refer to FIG. 10 and FIG. 11, each second tensioning assembly 20 can comprise a pulling block 2001, a second rotating shaft 2002 and an elastic part 2003.

[0114] Please refer to FIG. 10, wherein the pulling block 2001 of a second tensioning assembly 20 is rotatably connected to the base 16 at one end in the second direction through a second rotating shaft 2002, and the pulling block 2001 is rotatably connected to the first driven wheel 17 at the other end in the second direction. The elastic part 2003 is located between the first transmission belt 1 and the second rotating shaft 2002, and the elastic part 2003 is compressed between the base 16 and the pulling block 2001 in the first direction. The elastic part 2003 has a first end 20031 and a second end 20032 oppositely arranged in the first direction, the first end 20031 of the elastic part 2003 abuts against the base 16, and the second end 20032 of the elastic part 2003 abuts against the pulling block 2001. The compressed elastic part 2003 can apply a pushing force in the positive direction of the first direction to the pulling block 2001. Therefore, under the action of the elastic part 2003, the pulling block 2001 can apply a pulling force in the positive direction of the first direction to the first transmission belt 1. When the first transmission belt 1 is loose, the elastic part 2003 can push the pulling block 2001 to rotate around the second rotating shaft 2002 towards the direction close to the positive direction of the first direction, so that the pulling block 2001 tightens the first transmission belt 1, thereby tensioning the first transmission belt 1. The second tensioning assembly 20 can adaptively tension the first transmission belt 1 based on the state of the first transmission belt 1, which is convenient to use and can keep the first transmission belt 1 in a tensioned state, thereby ensuring the transmission accuracy of the first transmission belt 1, further ensuring the movement accuracy of the third transmission belt 3, thereby ensuring the movement accuracy of the output assembly 4, and further improving the printing accuracy and the model quality.

[0115] Please refer to FIG. 11, another second tensioning assembly 20 has a pull block 2001 rotatably connected to the base 16 at one end in the second direction through a second rotating shaft 2002, and rotatably connected to the second driven wheel 18 at the other end in the second direction. An elastic part 2003 is located between the second transmission belt 2 and the second rotating shaft 2002, and the elastic part 2003 is compressed between the base 16 and the pull block 2001 in the first direction. The elastic part 2003 has a first end 20031 and a second end 20032 oppositely arranged in the first direction, the first end 20031 of the elastic part 2003 abuts against the base 16, and the second end 20032 of the elastic part 2003 abuts against the pull block 2001. The compressed elastic part 2003 can apply a pushing force in the positive direction of the first direction to the pull block 2001. Therefore, under the action of the elastic part 2003, the pull block 2001 can apply a pulling force in the positive direction of the first direction to the second transmission belt 2. When the second transmission belt 2 is loose, the elastic part 2003 can push the pull block 2001 to rotate around the second rotating shaft 2002 towards the direction close to the positive direction of the first direction, so that the pull block 2001 tightens the second transmission belt 2, thereby tensioning the second transmission belt 2. The second tensioning assembly 20 can adaptively tension the second transmission belt 2 based on the state of the second transmission belt 2, is convenient to use, can keep the second transmission belt 2 in a tensioned state, thereby ensuring the transmission accuracy of the second transmission belt 2, further ensuring the movement accuracy of the third transmission belt 3, thereby ensuring the movement accuracy of the output assembly 4, and further improving the printing accuracy and the model quality.

[0116] As an example, please refer to FIGS. 10-13, the elastic part 2003 can be a spring. It can be understood that in other embodiments, the elastic part 2003 can also be other elastic structures, as long as the second tensioning assembly 20 can tension the corresponding transmission belt, which will not be repeated here.

[0117] Optionally, please refer to FIGS. 14-15, the above-mentioned pull block 2001 can be provided with a mounting hole 20011 matched with the elastic part 2003, and the mounting hole 20011 can be a blind hole, thereby limiting the second end 20032 of the elastic part 2003 in the mounting hole 20011.

[0118] Please refer to FIG. 15, the above-mentioned pull block 2001 can also have a second limiting part 20012, which can be formed in the mounting hole 20011 and protrude from the hole wall of the mounting hole 20011 in the reverse direction of the first direction, and the surface of the second limiting part 20012 and the hole wall of the mounting hole 20011 together limit an annular limiting groove 20013. The second end 20032 of the elastic part 2003 can abut against the annular limiting groove 20013, thereby more effectively limiting the elastic part 2003 and avoiding the elastic part 2003 from coming out of the mounting hole 20011, and further improving the assembly accuracy.

[0119] Please refer to FIG. 10 to FIG. 13 and FIG. 15, the above-mentioned pull block 2001 can be provided with a guide limiting hole 20014, and the base 16 is fixed with a first limiting part 1601. The first limiting part 1601 is slidingly connected to the guide limiting hole 20014, and the first limiting part 1601 cooperates with the guide limiting hole 20014 to limit the rotation angle of the pull block 2001. When the pull block 2001 rotates towards the direction close to the first direction with the second rotation shaft 2002 as the rotation center, the first limiting part 1601 can slide within the guide limiting hole 20014 relative to the pull block 2001, and the first limiting part 1601 can be used to limit the limit position of the pull block 2001 in the first direction, thereby avoiding the influence on the performance and service life of the transmission belt caused by excessive tensioning of the corresponding transmission belt, further improving the service life of the transmission belt and the transmission precision of the transmission belt.

[0120] As an example, please refer to FIG. 10 and FIG. 11, the guide limiting hole 20014 can be an oblong hole with the axis of the second rotation shaft 2002 as the axis, thereby avoiding the interference of the first limiting part 1601 with the rotation of the pull block 2001 with the second rotation shaft 2002 as the rotation center.

[0121] As an example, the first limiting part 1601 can include a columnar body (not shown in the figure) fixed to the base 16 and extending in the third direction, and the columnar body is slidingly connected within the guide limiting hole 20014, wherein the first direction, the second direction and the third direction are perpendicular to each other. In some examples, please refer to FIG. 10 and FIG. 11, the first limiting part 1601 can further include a flange body 16011 fixed to one end of the columnar body away from the base 16 in the third direction, and the diameter of the flange body 16011 is greater than the diameter of the columnar body, the flange body 16011 can limit the columnar body in the guide limiting hole 20014, avoiding the columnar body from being pulled out of the guide limiting hole 20014 in the third direction, and improving the assembly precision and the stability of the printer.

[0122] Please refer to FIG. 10 and FIG. 11, the above-mentioned base 16 can have a supporting surface 1602 abutting against the elastic part 2003, and the base 16 further has a third limiting part 1603 protruding from the edge of the supporting surface 1602, which not only facilitates precise assembly, but also more effectively limits the elastic part 2003 from moving away from the supporting surface 1602 relative to the base 16.

[0123] Please refer to FIG. 1 to FIG. 9, the motion device of the embodiment of the application further comprises a first tensioning assembly 19. The first tensioning assembly 19 comprises a fixed seat 1901 and a pressing block 1902. The pressing block 1902 is connected to the fixed seat 1901. The fixed seat 1901 is fixed to the third transmission belt 3, and the pressing block 1902 abuts against the third transmission belt 3 in a direction having an included angle with the second direction to apply a tensioning force to the third transmission belt 3.

[0124] In the embodiment of the application, the relative positions of the first end 3a and the second end 3b of the third transmission belt 3 are fixed, the fixed seat 1901 is fixed to the third transmission belt 3, and the pressing block 1902 is configured to abut against the third transmission belt 3 in a direction having an included angle with the second direction to apply a tensioning force to the third transmission belt 3, so that the third transmission belt 3 can be quickly and effectively tensioned, and the printing precision and the model quality are improved.

[0125] It can be understood that the abutment of the pressing block 1902 against the third transmission belt 3 in a direction having an included angle with the second direction means that the direction of the pressure applied by the pressing block 1902 to the third transmission belt 3 is not collinear with the second direction in which the third transmission belt 3 extends, so that part of the third transmission belt 3 protrudes towards other directions, as shown in FIG. 7, thereby achieving the purpose of tensioning the third transmission belt 3. As an example, the pressing block 1902 can abut against the third transmission belt 3 in a direction perpendicular to the second direction to apply a tensioning force to the third transmission belt 3, or the pressing block 1902 can also abut against the third transmission belt 3 in other directions, as long as the abutment of the pressing block 1902 against the third transmission belt 3 can achieve the effect of tensioning the third transmission belt 3.

[0126] Please refer to FIG. 7 and FIG. 8, the above-mentioned fixed seat 1901 can be provided with an assembly groove 19011 and a tensioning groove 19012. The assembly groove 19011 penetrates through the fixed seat 1901 in the second direction, and the tensioning groove 19012 is an arc-shaped groove and is communicated with the assembly groove 19011. The third transmission belt 3 is arranged in the assembly groove 19011, and the pressing block 1902 presses the third transmission belt 3 arranged in the assembly groove 19011 into the tensioning groove 19012, so as to fix the first tensioning assembly 19 to the third transmission belt 3 and tension the third transmission belt 3. That is, the pressing block 1902 cooperates with the fixed seat 1901 to not only tension the third transmission belt 3, but also fix the first tensioning assembly 19 to the third transmission belt 3, which is simple in structure, convenient to use and easy to install.

[0127] As an example, referring to FIG. 2 and FIG. 3, the third transmission belt 3 can be a closed belt. The third transmission belt 3 has a first side 3c in the positive direction of the first direction and a second side 3d in the negative direction of the first direction, and the first tensioning assembly 19 is fixed to the first side 3c of the third transmission belt 3. It can be understood that during rotation of the third transmission belt 3, the first side 3c of the third transmission belt 3 and the second side 3d of the third transmission belt 3 move in opposite directions. That is, during rotation of the third transmission belt 3, the first tensioning assembly 19 moves with the first side 3c of the third transmission belt 3.

[0128] It can be understood that in other embodiments, the first tensioning assembly 19 can also be tensioned and fixed to the second side 3d of the third transmission belt 3, which will not be described here.

[0129] Referring to FIG. 8, the first tensioning assembly 19 can further include a first rotating shaft 1903 and a fastener (not shown). The pressing block 1902 is rotatably connected to the fixed seat 1901 through the first rotating shaft 1903. The fastener is threadedly connected with the fixed seat 1901, and is configured to fix the pressing block 1902 to the fixed seat 1901, so as to prevent the pressing block 1902 from rotating relative to the fixed seat 1901, and enable the pressing block 1902 and the fixed seat 1901 to clamp the third transmission belt 3 together. In the case where the fastener does not fix the pressing block 1902 to the fixed seat 1901, the pressing block 1902 can move relative to the fixed seat 1901. For example, the pressing block 1902 can be detachably connected with the fixed seat 1901, the first rotating shaft 1903 can be fixed to the fixed seat 1901, the pressing block 1902 can be removed from the first rotating shaft 1903, and the pressing block 1902 can rotate around the first rotating shaft 1903; or the pressing block 1902 and the fixed seat 1901 cannot be detached, but the pressing block 1902 can rotate around the first rotating shaft 1903 relative to the fixed seat 1901. The first rotating shaft 1903 and the fastener are provided to facilitate pre-installation of the fixed seat 1901 to the third transmission belt 3. After the fixed seat 1901 is installed to the third transmission belt 3, the fastener can be screwed to fix the pressing block 1902 and the fixed seat 1901, so as to not only tension the third transmission belt 3, but also fix the first tensioning assembly 19 to the third transmission belt 3, which is simple in structure, convenient to use, and easy to install.

[0130] In some embodiments, the first rotation shaft 1903 can be arranged eccentrically relative to the tensioning groove 19012. The fastener can extend in the second direction, and as an example, the fastener can press the pressing block 1902 against the fixed seat 1901 in the second direction. It can be understood that when the fastener does not press the pressing block 1902 against the fixed seat 1901, the pressing block 1902 can rotate around the first rotation shaft 1903 relative to the fixed seat 1901, facilitating pre-installation of the fixed seat 1901 to the third transmission belt 3. After the fixed seat 1901 is installed to the third transmission belt 3, the fastener can be gradually tightened to press the pressing block 1902 against the fixed seat 1901. In this process, the pressing block 1902 can rotate around the first rotation shaft 1903 relative to the fixed seat 1901, and the distance between the surface of the pressing block 1902 abutting against the third transmission belt 3 and the groove wall of the tensioning groove 19012 becomes smaller and smaller, thereby gradually pressing the third transmission belt 3. When the fastener cannot continue to feed, it indicates that the pressing block 1902 has been completely pressed against the fixed seat 1901, and the pressing block 1902 cannot rotate relative to the fixed seat 1901 any more. At this time, the pressing block 1902 also presses the third transmission belt 3 tightly in the tensioning groove 19012, which not only can tension the third transmission belt 3, but also can fix the first tensioning assembly 19 to the third transmission belt 3, and the structure is simple and convenient to use and install.

[0131] The pressing block 1902 can include a connecting portion 19021 and a pressing portion 19022, as shown in FIG. 8. The pressing portion 19022 extends from the connecting portion 19021, and the pressing portion 19022 and the connecting portion 19021 are arranged at an angle. The first rotation shaft 1903 is connected to the junction of the connecting portion 19021 and the pressing portion 19022. The fastener is configured to press the connecting portion 19021 against the fixed seat 1901. When the fastener presses the connecting portion 19021 against the fixed seat 1901, the pressing portion 19022 is configured to press the third transmission belt 3 passing through the assembly groove 19011 against the tensioning groove 19012, and the structure is simple and convenient to assemble, which not only has good tensioning effect, but also can firmly fix the first tensioning assembly 19 to the third transmission belt 3, so that the first tensioning assembly 19 can move synchronously with the third transmission belt 3, avoiding damage to the third transmission belt 3 caused by relative movement between the first tensioning assembly 19 and the third transmission belt 3.

[0132] As an example, the pressing portion 19022 and the connecting portion 19021 can have an obtuse included angle.

[0133] Please refer to FIG. 8, in some examples, the fixing base 1901 can also be provided with a mounting groove 19013, the mounting groove 19013 and the tensioning groove 19012 are respectively arranged on the opposite sides of the assembly groove 19011, and the mounting groove 19013, the tensioning groove 19012 and the assembly groove 19011 jointly limit a mounting space for mounting the pressing block 1902. The mounting groove 19013 has a first surface 190131 and a second surface 190132 arranged oppositely. The fixing base 1901 can be provided with an assembly hole 19014 threadedly matched with a fastener, the assembly hole 19014 extends along the second direction and penetrates the first surface 190131 of the mounting groove 19013. The fastener threadedly connected in the assembly hole 19014 can be fed along the second direction to press the connecting portion 19021 against the second surface 190132 of the mounting groove 19013. When the first tensioning assembly 19 needs to be disassembled, the fastener can be screwed out along the second direction, so that the connecting portion 19021 is no longer pressed against the second surface 190132 of the mounting groove 19013, which is convenient for use and disassembly.

[0134] Please refer to FIG. 8, the pressing block 1902 can also be provided with a locking hole 19023 matched with a fastener, the locking hole 19023 can be a blind hole and the locking hole 19023 can be a light hole, the fastener can be fed into the locking hole 19023 along the second direction and abut against the hole bottom of the locking hole 19023, which not only avoids damage to the appearance surface of the pressing block 1902 caused by abutting of the fastener against the appearance surface of the pressing block 1902, but also improves the matching precision of the pressing block 1902 and the fastener.

[0135] In some embodiments, the hole diameter of the locking hole 19023 can be greater than the hole diameter of the assembly hole 19014, so as to facilitate insertion of the fastener into the locking hole 19023 and avoid interference between the hole wall of the locking hole 19023 and the fastener, which causes the fastener to fail to press the pressing block 1902 against the fixing base 1901.

[0136] Please refer to FIG. 8, the length L1 of the connecting portion 19021 can be greater than the length L2 of the pressing portion 19022, so as to utilize the lever principle to make the pressing portion 19022 more effectively press the third transmission belt 3 penetrating the assembly groove 19011 into the tensioning groove 19012. It can be understood that in other embodiments, the length L1 of the connecting portion 19021 can also be not greater than the length L2 of the pressing portion 19022, which can be set as required and will not be described here. It can be understood that in other embodiments, the pressing block 1902 can be connected and fixed with the fixing base 1901 in other manners, as long as the pressing block 1902 abuts against the third transmission belt 3 to tension the third transmission belt 3.

[0137] As an implementation, the first tensioning assembly 19 can be fixed with the output assembly 4, please refer to FIG. 1, FIG. 6, FIG. 7 and FIG. 9, which can avoid the first tensioning assembly 19 interfering with the movement of the output assembly 4, and the layout is more reasonable.

[0138] As an example, the output assembly 4 can be fixed to the third transmission belt 3 through the first tensioning assembly 19, that is, the first tensioning assembly 19 can not only effectively tension the third transmission belt 3, improve the printing precision and model quality, but also fix the output assembly 4 to the third transmission belt 3, so that the third transmission belt 3 can drive the output assembly 4 to move, the structure is simple, convenient to assemble, convenient to use, and the layout is more reasonable.

[0139] In some examples, when assembling, the fixed seat 1901 can be fixed to the output assembly 4 first, and then the third transmission belt 3 is fixed to the fixed seat 1901 through the pressing block 1902, and the pressing block 1902 with the eccentric angle can compress the third transmission belt 3 that is too long, thereby improving the transmission precision of the third transmission belt 3.

[0140] It can be understood that in other implementations, the output assembly 4 can be directly fixed to the third transmission belt 3, as long as the first tensioning assembly 19 does not interfere with the movement of the output assembly 4, which will not be described here.

[0141] The 3D printer of the embodiment of the application comprises the above-mentioned any movement device.

[0142] In the 3D printer of the embodiment of the application, the movement device comprises a first transmission belt 1, a second transmission belt 2, a third transmission belt 3 and an output assembly 4. In the case that the first transmission belt 1 and the second transmission belt 2 rotate in the same direction, the third transmission belt 3 drives the output assembly 4 to move in the second direction. In the case that the first transmission belt 1 and the second transmission belt 2 rotate in opposite directions, the third transmission belt 3 drives the output assembly 4 to move in the first direction. The embodiment of the application not only can effectively drive the output assembly 4 to move in the first direction and the second direction, but also can shorten the length of a single transmission belt by arranging three transmission belts to transmit power to drive the output assembly 4 to move, that is, the length of the first transmission belt 1, the second transmission belt 2 and the third transmission belt 3 is shortened, thereby improving the problem of the transmission belt relaxing after a long time of use, improving the movement precision of the output assembly 4, and thereby improving the printing precision and model quality.

[0143] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, it should be considered as the scope of the description.

[0144] The above embodiments only express the preferred embodiments of the present application, which are described in a more specific and detailed manner, but should not be construed as limiting the scope of the patent application. It should be noted that for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which are all within the scope of protection of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A motion device, characterized by, The motion device comprises: a first transmission belt extending along a first direction; a second transmission belt extending along the first direction; a third transmission belt extending along a second direction perpendicular to the first direction, the third transmission belt having a first end and a second end in the second direction, the first end of the third transmission belt being transmissionally connected to the first transmission belt, the second end of the third transmission belt being transmissionally connected to the second transmission belt; and an output assembly fixed to the third transmission belt; the third transmission belt is configured to: drive the output assembly to move along the second direction when the first transmission belt and the second transmission belt rotate in the same direction; drive the output assembly to move along the first direction when the first transmission belt and the second transmission belt rotate in opposite directions. At least one of the first transmission belt, the second transmission belt and the third transmission belt is a closed loop belt.

2. The exercise device of claim 1, wherein, when the first transmission belt and the second transmission belt rotate in the same clockwise direction, the third transmission belt rotates in the clockwise direction following the first transmission belt and the second transmission belt, driving the output assembly to move in a forward direction along the second direction; 3. The exercise device of claim 1, wherein, when the first transmission belt and the second transmission belt rotate in the same counterclockwise direction, the third transmission belt rotates in the counterclockwise direction following the first transmission belt and the second transmission belt, driving the output assembly to move in a reverse direction along the second direction; when the first transmission belt rotates in the clockwise direction and the second transmission belt rotates in the counterclockwise direction, the third transmission belt does not rotate, driving the output assembly to move in the forward direction along the first direction; when the first transmission belt rotates in the counterclockwise direction and the second transmission belt rotates in the clockwise direction, the third transmission belt does not rotate, driving the output assembly to move in the reverse direction along the first direction. The motion device further comprises a first synchronous wheel and a second synchronous wheel; 4. The exercise device of claim 1, wherein, wherein the first synchronous wheel is engaged with the first end of the third transmission belt and engaged with the first transmission belt, the first synchronous wheel being configured to transmit power from the first transmission belt to the third transmission belt; the second synchronous wheel is engaged with the second end of the third transmission belt and engaged with the second transmission belt, the second synchronous wheel being configured to transmit power from the second transmission belt to the third transmission belt. The motion device further comprises a first slide rod and a second slide rod extending along the first direction and fixed in relative positions, respectively, a first slide base slidingly connected to the first slide rod, and a second slide base slidingly connected to the second slide rod; 5. The exercise device of claim 4, wherein, the first synchronous wheel is rotationally connected to the first slide base, and the second synchronous wheel is rotationally connected to the second slide base. The motion device further comprises a first compression wheel and a second compression wheel; 6. The exercise device of claim 5, wherein, the first compression wheel is rotationally connected to the first slide base for compressing the first transmission belt against the first synchronous wheel; the second compression wheel is rotationally connected to the second slide base for compressing the second transmission belt against the second synchronous wheel. ​ 7. The exercise device of claim 6, wherein, The movement device comprises two first compression wheels, which are symmetrically arranged on both sides of the first synchronous wheel in the first direction. The movement device comprises two second compression wheels, which are symmetrically arranged on both sides of the second synchronous wheel in the first direction.

8. The exercise device of claim 5, wherein, The movement device further comprises at least one connecting rod extending in the second direction, one end of the connecting rod being fixed to the first sliding seat in the second direction, and the other end of the connecting rod being fixed to the second sliding seat in the second direction. The output assembly is slidingly connected to the connecting rod.

9. The exercise device of claim 8, wherein, The movement device comprises two connecting rods, which are arranged at intervals in the first direction, and the third transmission belt is arranged between the two connecting rods.

10. The exercise device of claim 1, wherein, The movement device further comprises a first tensioning assembly, which comprises a fixed seat and a pressing block connected to the fixed seat, the fixed seat being fixed to the third transmission belt, and the pressing block being configured to abut the third transmission belt in a direction having an included angle with the second direction to tension the third transmission belt.

11. The exercise device of claim 10, wherein, The first tensioning assembly is fixed to the output assembly.

12. The exercise device of claim 11, wherein, The fixed seat is provided with an assembly groove and a tensioning groove, the assembly groove penetrating through the fixed seat in the second direction, and the tensioning groove being an arc-shaped groove and being communicated with the assembly groove. The third transmission belt is arranged in the assembly groove. The pressing block is configured to press the third transmission belt arranged in the assembly groove into the tensioning groove, so as to fix the first tensioning assembly to the third transmission belt and tension the third transmission belt.

13. The exercise device of claim 12, wherein, The first tensioning assembly further comprises a first rotating shaft and a fastener. The first rotating shaft is arranged eccentrically relative to the tensioning groove, and the pressing block is rotatably connected to the fixed seat through the first rotating shaft. The fastener is threadedly connected to the fixed seat, and the fastener is configured to fix the pressing block to the fixed seat.

14. The exercise device of claim 13, wherein, The pressing block comprises a connecting portion and a pressing portion extending from the connecting portion, the pressing portion and the connecting portion being arranged at an angle, and the first rotating shaft being connected to the junction of the connecting portion and the pressing portion. The fastener is configured to press the connecting portion against the fixed seat. In the case that the fastener presses the connecting portion against the fixed seat, the pressing portion is configured to press the third transmission belt arranged in the assembly groove into the tensioning groove.

15. The exercise device of claim 1, wherein, The movement device further comprises a first driving assembly and a second driving assembly. The first driving assembly is drivingly connected to the first transmission belt to drive the first transmission belt to rotate. The second driving assembly is drivingly connected to the second transmission belt to drive the second transmission belt to rotate.

16. The exercise device of claim 15, wherein, The first driving assembly comprises a first driving portion and a first driving wheel fixed to the output end of the first driving portion, and the first transmission belt has a first end and a second end in the first direction, and the first end of the first transmission belt is engaged with the first driving wheel. The second driving assembly comprises a second driving part and a second driving wheel fixed to an output end of the second driving part; the second transmission belt has a first end and a second end in the first direction, and the first end of the second transmission belt is engaged with the second driving wheel.

17. The exercise device of claim 16, wherein, The exercise device further comprises a base, a first driven wheel and a second driven wheel; The first driving part and the second driving part are respectively fixed to the base; The first driven wheel is rotatably connected to the base and is drivingly connected to the second end of the first transmission belt; The second driven wheel is rotatably connected to the base and is drivingly connected to the second end of the second transmission belt.

18. The exercise device of claim 17, wherein, The exercise device further comprises two second tensioning assemblies, one of which is used for tensioning the first transmission belt and the other of which is used for tensioning the second transmission belt; The second tensioning assembly comprises a pulling block and an elastic part, one end of the pulling block in the second direction is rotatably connected to the base, the other end of the pulling block in the second direction is rotatably connected to the first driven wheel or the second driven wheel, and the elastic part is compressed between the base and the pulling block in the first direction to tension the first transmission belt or the second transmission belt.

19. The exercise device of claim 18, wherein, The pulling block is provided with a guide limiting hole, and the base is fixed with a first limiting part slidingly connected to the guide limiting hole.

20. A 3D printer characterized by, The exercise device comprises: The exercise device according to any one of claims 1 to 19.

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