3D printer

Abstract

A 3D printer comprises a printing platform, a printing head and a movement mechanism. The printhead is configured to be movable relative to the printing platform. The movement mechanism comprises a driving motor, a synchronous belt, a sliding piece, a first synchronous belt wheel and a second synchronous belt wheel. The sliding piece is connected to the synchronous belt so as to be driven by the synchronous belt to move within the stroke range extending along the straight line. The first synchronous pulley is in transmission connection with the driving motor, is sleeved by a synchronous belt, and is arranged at the first end of the stroke range of the sliding part; and the second synchronous pulley is in transmission connection with the driving motor, the second synchronous pulley is sleeved by a synchronous belt and is arranged at a second end of the stroke range of the sliding piece, and the second end is opposite to the first end. Wherein the driving motor is arranged between the first end and the second end.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a 3D printer. Background Art

[0002] 3D printing technology, also known as additive manufacturing technology, is a technology that uses digital model files as the basis, uses adhesive materials, and constructs objects by printing layer by layer. 3D printing is usually achieved using a 3D printer. 3D printers, also known as three-dimensional printers and stereo printers, are a type of rapid prototyping process equipment.

[0003] The motion mechanism is an important component in a 3D printer. The motion mechanism includes a synchronous belt and a motor for driving the synchronous belt, which is used to drive the print head or printing platform to move along a fixed direction within the travel range defined by the synchronous belt to complete the printing of the 3D model. At present, the motor in the motion mechanism is arranged outside the print head or the travel range or at the edge of the travel range. Since the motor is often large in size, the space utilization rate in the direction of the travel range is low. Utility Model Content

[0004] The present application aims to at least alleviate one of the technical problems existing in the background technology. To this end, one purpose of the present application is to provide a 3D printer, which can reduce the occupied space of the 3D printer to a certain extent by improving the layout position of the drive motor of the motion mechanism in the 3D printer and improving the space utilization in the direction of the stroke range.

[0005] The first aspect of the embodiment of the present application provides a 3D printer, including a printing platform, a print head and a motion mechanism. The print head is configured to be able to move relative to the printing platform. The motion mechanism includes a drive motor, a synchronous belt, a sliding member, a first synchronous pulley and a second synchronous pulley. The sliding member is connected to the synchronous belt so as to be driven by the synchronous belt to move within a travel range extending in a straight line; the first synchronous pulley is connected to the drive motor in a transmission manner, the first synchronous pulley is sleeved by the synchronous belt, and is arranged at the first end of the travel range of the sliding member; the second synchronous pulley is connected to the drive motor in a transmission manner, the second synchronous pulley is sleeved by the synchronous belt, and is arranged at the second end of the travel range of the sliding member, and the second end is opposite to the first end. Wherein, the drive motor is arranged between the first end and the second end.

[0006] In the technical solution of the first aspect mentioned above, by arranging the drive motor within the travel range of the sliding member, it is avoided that the drive motor protrudes beyond the travel range of the sliding member in the X-axis direction, thereby improving the space utilization of the 3D printer in the X-axis direction, and also making the outer contour of the 3D printer in the X-axis direction more neat, which is beneficial to protecting the 3D printer during transportation.

[0007] In some embodiments, the print head is mounted on a sliding member, so that the print head can move with the sliding member within its travel range, so that the print head can move faster and more accurately, thereby improving the efficiency of 3D printing to a certain extent.

[0008] In some embodiments, the 3D printer is a gantry structure 3D printer, and the drive motor is arranged between two columns of the gantry structure. Therefore, the structural form of the 3D printer is specifically selected as a gantry structure, which simplifies the structural form of the 3D printer to a certain extent, and is conducive to the production or maintenance of the 3D printer.

[0009] In some embodiments, the motion mechanism further includes an X-axis frame body, the X-axis frame body can move along the Z-axis direction, the sliding member is slidably connected to the X-axis frame body, so that the print head can move along the X-axis direction relative to the X-axis frame body, the travel range is the travel range in the X-axis direction, and the first synchronous pulley, the second synchronous pulley and the drive motor are arranged on the X-axis frame body. Thus, the X-axis frame body as a whole provides a stable installation position for the sliding member, the first synchronous pulley, the second synchronous pulley and the drive motor, which increases the stability of the motion mechanism to a certain extent, which is conducive to improving the accuracy of 3D printing.

[0010] In some embodiments, the printing platform includes a printing surface, the printing surface faces the print head, and is located in a plane formed by the X-axis direction and the Y-axis direction. The motion mechanism also includes a Y-axis motion mechanism, and the Y-axis motion mechanism is configured to drive the printing platform to move along the Y-axis direction. Thus, the motion mechanisms in the X-axis and Y-axis directions are independently set, the motion mechanism in the X-axis direction drives the sliding member (print head) to move, and the motion mechanism in the Y-axis direction drives the printing platform to move. The movements in the two directions are independent of each other, which can make the relative position between the print head and the printing platform more flexible, and can achieve more complex printing trajectories and higher printing accuracy. At the same time, the two independent motion mechanisms as described above can simultaneously realize the relative movement between the print head and the printing platform in the X-axis and Y-axis directions, reducing the 3D printing time and improving the 3D printing efficiency.

[0011] In some embodiments, the motion mechanism further includes an active synchronous pulley, which is in transmission connection with the drive motor, is sleeved by the synchronous belt, and is used to drive the synchronous belt, and is arranged between the first synchronous pulley and the second synchronous pulley. Thus, by arranging the active synchronous pulley in transmission connection with the drive motor between the first synchronous pulley and the second synchronous pulley, the flexibility of arranging the drive motor can be further improved.

[0012] In some embodiments, the active synchronous pulley is coaxially arranged with the output shaft of the drive motor. Thus, the coaxial arrangement of the active synchronous pulley and the output shaft of the drive motor can reduce the transmission links and related mechanical parts, reduce energy loss and transmission loss, and improve transmission efficiency. At the same time, the coaxial arrangement can reduce errors and distortions in the motion transmission process, improve motion accuracy, and thus improve the quality and effect of 3D printing.

[0013] In some embodiments, the motion mechanism further includes a third synchronous pulley, which is connected to the drive motor by transmission, the third synchronous pulley is sleeved by a synchronous belt, the active synchronous pulley is located between the second synchronous pulley and the third synchronous pulley, and the angle formed by the line connecting the active synchronous pulley and the second synchronous pulley and the line connecting the active synchronous pulley and the third synchronous pulley is between 30 degrees and 150 degrees. Therefore, when the synchronous belt passes through the second synchronous pulley, the active synchronous pulley and the third synchronous pulley in sequence, its movement direction is deflected at a corresponding angle according to the angle between the second synchronous pulley, the active synchronous pulley and the third synchronous pulley, thereby preventing the synchronous belt from slipping during the transmission process, and improving the operation stability of the motion mechanism to a certain extent.

[0014] In some embodiments, the second synchronous pulley is an active synchronous pulley, which is in transmission connection with the drive motor. Thus, the second synchronous pulley is set as an active synchronous pulley driven by the drive motor, which reduces the number of wheels in the transmission gear train, thereby reducing the energy loss caused by the friction between the transmission belt and the wheel, and improving the transmission efficiency.

[0015] In some embodiments, the motion mechanism further includes a tensioning mechanism for adjusting the tension on the synchronous belt. Thus, by setting the tensioning mechanism to adjust the tensioning force, the tension is always kept within a preset value range, which is conducive to the stable operation of the motion mechanism and can also increase the service life of the motion mechanism to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0017] Figure 1 A schematic diagram of a 3D printer according to some embodiments of the present application;

[0018] Figure 2 This is a schematic diagram of the structure of a 3D printer according to some embodiments of the present application. DETAILED DESCRIPTION

[0019] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0021] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0025] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "lateral", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of the present application.

[0026] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0027] As mentioned above, the motion mechanism in the current 3D printer arranges the print head outside the travel range, which has the problem of low space utilization in the travel direction of the print head.

[0028] In view of the above-mentioned drawbacks, the implementation of the present application provides a 3D printer, a 3D printer, including a printing platform, a print head and a motion mechanism. The print head is constructed to be able to move relative to the printing platform. The motion mechanism includes a drive motor, a synchronous belt, a sliding member, a first synchronous pulley and a second synchronous pulley. The sliding member is connected to the synchronous belt so as to be driven by the synchronous belt to move within a travel range extending in a straight line; the first synchronous pulley is connected to the drive motor in a transmission manner, the first synchronous pulley is sleeved by the synchronous belt, and is arranged at the first end of the travel range of the sliding member; the second synchronous pulley is connected to the drive motor in a transmission manner, the second synchronous pulley is sleeved by the synchronous belt, and is arranged at the second end of the travel range of the sliding member, and the second end is opposite to the first end. Wherein, the drive motor is arranged between the first end and the second end.

[0029] Figure 1 Schematic diagram of a 3D printer 10 according to some embodiments of the present application.

[0030] like Figure 1 As shown, the 3D printer 10 includes a printing platform (or heated bed) 11 , a print head 12 movable relative to the printing platform 11 , and a motion mechanism 100 .

[0031] The printing platform 11 may include a heated bed, and may further include a printing panel.

[0032] The print head 12 includes a hot end and may further include a driving extruder wheel 15. The driving extruder wheel 15 transports the printing material 14 provided by the material tray 13 to the 3D printer 10 to the hot end. The hot end has a heating function, and the hot end heats the printing material 14 to a molten state and extrude the molten printing material 14 onto the printing platform 11.

[0033] Exemplarily, the hot end includes a heat sink fin, a nozzle, and a throat located between the heat sink fin and the nozzle. The printing material 14 passes through the heat sink fin, the throat, and the nozzle in sequence. Specifically, the printing material 14 is heated to a molten state at the nozzle, and the nozzle extrude the molten printing material 14 onto the printing platform 11. When at least one of the print head 12 and the printing platform 11 moves along the printing path, the nozzle extrude the molten printing material 14 layer by layer at different positions of the printing platform 11, thereby printing a three-dimensional object.

[0034] The driving extrusion wheel 15 includes an active extrusion wheel and a driven extrusion wheel arranged opposite to the active extrusion wheel, and the printing material 14 passes between the active extrusion wheel and the driven extrusion wheel. The active extrusion wheel rotates in a first direction to drive the printing material 14 to be transported to the hot end; the active extrusion wheel rotates in an X-axis direction opposite to the first direction to drive the printing material 14 to retreat to the material tray 13. It should be understood that in some embodiments, the driving extrusion wheel 15 can be arranged locally or near the print head assembly of the print head 12 (referred to as "near-end feeding"), and in some embodiments, the driving extrusion wheel 15 can be arranged away from the print head assembly (referred to as "distal-end feeding"). In some embodiments, the driving extrusion wheel 15 can be at least two groups, which can be arranged locally or near the print head assembly of the print head 12 (referred to as "near-end feeding"), and at the same time arranged away from the print head assembly (referred to as "distal-end feeding"). The present application is not limited in this respect.

[0035] The motion mechanism 100 is connected to the print head 12 in a transmission manner to drive the print head 12 to move relative to the printing platform 11. In some embodiments, the motion mechanism 100 may also be connected to the printing platform 11 in a transmission manner to drive the printing platform 11 to move relative to the print head 12.

[0036] The 3D printer 10 may further include at least one processor (not shown). The at least one processor is used to control the drive motor ( Figure 1 The at least one processor may also control another drive motor (not shown) to drive the motion mechanism 100, thereby driving the print head 12 to move relative to the printing platform 11, or driving the printing platform 11 to move relative to the print head 12. Figure 1 The extruder 15 (not shown) drives the extruder wheel 15 to feed the printing material 14 on the material tray 13 into the print head 12. When the motion mechanism 100 drives the print head 12 or the printing platform 11 to move, the printing material 14 can be extruded from the print head 12 and deposited on the printing platform 11, thereby printing the 3D model layer by layer.

[0037] Figure 2 Schematic diagram of the structure of a 3D printer 10 according to some embodiments of the present application.

[0038] like Figure 1 and Figure 2 As shown, the 3D printer 10 includes a printing platform 11, a print head 12 and a motion mechanism 100. The print head 12 is configured to be able to move relative to the printing platform 11. The motion mechanism 100 includes a drive motor 110, a synchronous belt 130, a sliding member 140, a first synchronous pulley 121 and a second synchronous pulley 122. The sliding member 140 is connected to the synchronous belt 130 so as to be driven by the synchronous belt 130 to reciprocate within a travel range extending linearly along the X-axis direction. The first synchronous pulley 121 is connected to the drive motor 110 in a transmission manner, the first synchronous pulley 121 is sleeved by the synchronous belt 130, and is arranged at the first end of the travel range of the sliding member 140. The second synchronous pulley 122 is connected to the drive motor 110 in a transmission manner, the second synchronous pulley 122 is sleeved by the synchronous belt 130, and is arranged at the second end of the travel range of the sliding member 140, and the second end is opposite to the first end. Wherein, the drive motor 110 is arranged between the first end and the second end.

[0039] In the 3D printer 10 of the embodiment of the present application, the synchronous pulley may be a driving synchronous pulley, a driven synchronous pulley, an idler pulley or a tensioning pulley (a type of tensioning mechanism).

[0040] In the 3D printer 10 of the embodiment of the present application, the sliding member 140 of the motion mechanism 100 is connected to the synchronous belt 130. As the driving motor 110 drives the synchronous belt 130 to move, the sliding member 140 can reciprocate along the X-axis direction. In the X-axis direction, the first synchronous pulley 121 and the second synchronous pulley 122 are respectively located at both ends, thereby limiting the movement limits of the sliding member 140 at both ends in the X-axis direction.

[0041] In some embodiments, the lowest point of the wheel surface and / or the highest point of the wheel surface of the first synchronous pulley 121 and the second synchronous pulley 122 are at the same height in the Z-axis direction, thereby ensuring that at least a section of the synchronous belt 130 runs along the X-axis direction to a certain extent, and limiting unnecessary displacement or jitter in the Z-axis direction when the print head 12 moves along the X-axis direction to a certain extent.

[0042] Therefore, by arranging the drive motor 110 within the travel range of the sliding member 140, it is avoided that the drive motor 110 protrudes beyond the travel range of the sliding member 140 in the X-axis direction, thereby improving the space utilization of the 3D printer 10 in the X-axis direction, and also making the outer contour of the 3D printer in the X-axis direction more neat, which is beneficial to protecting the 3D printer during transportation.

[0043] According to some embodiments of the present application, the print head 12 is mounted on the slide 140. Thus, the print head 12 can move with the slide 140 within its travel range, so that the print head 12 can move faster and more accurately, thereby improving the efficiency of 3D printing to a certain extent.

[0044] According to some embodiments of the present application, the 3D printer 10 is a 3D printer with a gantry structure, and the drive motor 110 is arranged between two columns of the gantry structure 16 .

[0045] like Figure 2 As shown, the gantry structure 16 includes two columns spaced apart in the X-axis direction. The two columns are located at both ends of the gantry structure 16 in the X-axis direction and extend upward along the Z-axis direction. The drive motor 110 can be directly or indirectly connected to the two columns of the gantry structure 16, so that the drive motor 110 can move up and down along the columns of the gantry structure 16 in the Z-axis direction.

[0046] Therefore, the structural form of the 3D printer 10 is specifically selected as the gantry structure 16, which simplifies the structural form of the 3D printer 10 to a certain extent, and is beneficial to the production or maintenance of the 3D printer.

[0047] According to some embodiments of the present application, the motion mechanism 100 also includes an X-axis frame 170, which can move along the Z-axis direction. The sliding member 140 is slidably connected to the X-axis frame 170 so that the print head 12 can move along the X-axis direction relative to the X-axis frame 170, and the travel range is the travel range in the X-axis direction. The first synchronous pulley 121, the second synchronous pulley 122 and the drive motor 110 are arranged on the X-axis frame 170.

[0048] The X-axis frame 170 is a rigid structure extending along the X-axis direction, and the length of the X-axis frame 170 in the X-axis direction can be greater than or equal to the stroke length of the sliding member 140, or can be less than the stroke length of the sliding member 140. The first synchronous pulley 121 and the second synchronous pulley 122 can be arranged on the X-axis frame. Specifically, the first synchronous pulley 121 or the second synchronous pulley 122 can be slidably connected, elastically connected, rotatably connected or fixedly connected to the X-axis frame. One of the first synchronous pulley 121 and the second synchronous pulley 122 can be connected to the driving motor in a transmission manner, and the driving motor 110 can also be arranged on the X-axis frame. Both ends of the X-axis frame 170 in the X-axis direction are movably connected to the gantry structure 16, and the X-axis frame 170 can move up and down along the Z-axis direction, thereby driving the print head 12 to move up and down along the Z-axis direction. At the same time, the sliding member 140 is driven by the synchronous belt to be slidably connected to the X-axis frame 170, so that it can move along the X-axis direction.

[0049] In some embodiments, the first synchronous pulley 121 and the second synchronous pulley 122 can be located on one side of the X-axis frame 170 along the Y-axis direction, and the drive motor 110 can be located on the other side of the X-axis frame 170 along the Y-axis direction. This can avoid possible positional interference between the drive motor 110 and the two synchronous pulleys to a certain extent, making the positional arrangement of the drive motor 110 more flexible.

[0050] In some embodiments, the sliding member 140 may include a snapping member, which is clamped at the upper and lower ends of the X-axis frame 170 along the Z-axis direction; or, the sliding member 140 may include a slider, a slide rail in the X-axis direction is installed on the X-axis frame 170, and the sliding member 140 can move on the slide rail; or, the sliding member 140 may include a pulley, a guide rail in the X-axis direction is installed on the X-axis frame 170, and the sliding member 140 can move on the guide rail; or, the sliding member 140 may include a bearing, an optical axis in the X-axis direction is installed on the X-axis frame 170, and the sliding member 140 can move on the optical axis, thereby realizing the sliding connection between the sliding member 140 and the X-axis frame 170. When the sliding member 140 reciprocates along the X-axis frame 170 on the surface of the X-axis frame, the sliding member 140 can share part of the gravity of the print head 12 to the X-axis frame 170, thereby avoiding to a certain extent the shaking of the flexible synchronous belt 130 in the vertical direction due to the influence of gravity. As a result, the movement stability of the sliding member 140 is increased to a certain extent, which is beneficial to the improvement of 3D printing accuracy.

[0051] Therefore, the X-axis frame 170 as a whole provides a stable installation position for the sliding member 140, the first synchronous pulley 121, the second synchronous pulley 122 and the driving motor 110, which increases the stability of the motion mechanism 100 to a certain extent and is conducive to improving the accuracy of 3D printing.

[0052] According to some embodiments of the present application, the printing platform 11 includes a printing surface, which faces the print head 12 and is located in a plane formed by the X-axis direction and the Y-axis direction. The motion mechanism 100 also includes a Y-axis motion mechanism 17, which is configured to drive the printing platform 11 to move along the Y-axis direction.

[0053] Thus, the motion mechanisms in the X-axis and Y-axis directions are independently set, the motion mechanism in the X-axis direction drives the sliding member 140 (print head 12) to move, and the motion mechanism in the Y-axis direction drives the printing platform 11 to move. The movements in the two directions are independent of each other, which can make the relative position between the print head 12 and the printing platform 11 more flexible, and can achieve more complex printing tracks and higher printing accuracy. At the same time, the two independent motion mechanisms as described above can simultaneously achieve the relative movement between the print head 12 and the printing platform 11 in the X-axis and Y-axis directions, reducing the 3D printing time and improving the 3D printing efficiency.

[0054] According to some embodiments of the present application, the printing platform 11 is mounted on the slide 140. Thus, the printing platform 11 can move with the slide 140 within its travel range, so that the printing platform 11 can move faster and more accurately, thereby improving the efficiency of 3D printing to a certain extent.

[0055] According to some embodiments of the present application, the motion mechanism 100 also includes an active synchronous pulley 120, which is transmission-connected to the drive motor 110, and the active synchronous pulley 120 is sleeved by a synchronous belt 130 and is used to drive the synchronous belt 130, and the active synchronous pulley 120 is arranged between the first synchronous pulley 121 and the second synchronous pulley 122.

[0056] like Figure 2 As shown, the driving synchronous pulley 120 can be installed on the X-axis frame 170 , and its position in the X-axis direction is located between the first synchronous pulley 121 and the second synchronous pulley 122 .

[0057] In some embodiments, the centerline height of the active synchronous pulley 120 in the Z-axis direction may be different from the centerline height of the first synchronous pulley 121 and / or the second synchronous pulley 122. At this time, the shape of the synchronous belt 130 sleeved on the first synchronous pulley 121, the second synchronous pulley 122 and the active synchronous pulley 120 is at least triangular, which increases the tension of the synchronous belt 130 to a certain extent, avoids the relaxation of the synchronous belt 130, and is conducive to improving the transmission efficiency of the synchronous belt 130.

[0058] Therefore, by arranging the driving synchronous pulley 120 drivingly connected to the driving motor 110 between the first synchronous pulley 121 and the second synchronous pulley 122 , the flexibility of arranging the driving motor 110 can be further improved.

[0059] According to some embodiments of the present application, the driving synchronous pulley 120 is coaxially arranged with the output shaft of the driving motor 110 .

[0060] Therefore, the coaxial arrangement of the active synchronous pulley 120 and the output shaft of the driving motor 110 can reduce the transmission links and related mechanical parts, reduce energy loss and transmission loss, and improve transmission efficiency. At the same time, the coaxial arrangement can reduce errors and distortions in the motion transmission process, improve motion accuracy, and thus improve the quality and effect of 3D printing.

[0061] According to some embodiments of the present application, the motion mechanism 100 also includes a third synchronous pulley 160, which is transmission-connected to the drive motor 110. The third synchronous pulley 160 is sleeved by the synchronous belt 130. The driving synchronous pulley 120 is located between the second synchronous pulley 122 and the third synchronous pulley 160. The angle a formed by the line connecting the driving synchronous pulley 120 and the second synchronous pulley 122 and the line connecting the driving synchronous pulley 120 and the third synchronous pulley 160 is between 30 degrees and 150 degrees.

[0062] Therefore, when the synchronous belt 130 passes through the second synchronous pulley 122, the driving synchronous pulley 120 and the third synchronous pulley 160 in sequence, its movement direction is deflected at a corresponding angle according to the angle a between the second synchronous pulley 122, the driving synchronous pulley 120 and the third synchronous pulley 160, thereby preventing the synchronous belt 130 from slipping during the transmission process and improving the operating stability of the motion mechanism 100 to a certain extent.

[0063] According to some embodiments of the present application, the second synchronous pulley 122 is an active synchronous pulley, and the second synchronous pulley 122 is transmission-connected to the drive motor 110 .

[0064] In some embodiments, the transmission connection between the second synchronous pulley 122 and the drive motor 110 can be coaxially driven by the drive motor 110, thereby reducing the complexity of the transmission process, reducing energy loss and transmission loss, and improving transmission efficiency.

[0065] In some embodiments, the transmission connection between the second synchronous pulley 122 and the drive motor 110 can be achieved through gear transmission. For example, a first gear is provided on the rotating shaft of the second synchronous pulley 122, and a second gear is provided on the rotating shaft of the drive motor 110. The first gear and the second gear are meshed with each other, so that the drive motor 110 can drive the second synchronous pulley 122 to rotate, thereby realizing the reciprocating motion of the sliding member 140 in the X-axis direction, which is conducive to achieving accurate, stable and efficient transmission.

[0066] In some embodiments, the transmission connection between the second synchronous pulley 122 and the drive motor 110 can be realized by rack transmission. For example, a first gear is provided on the rotating shaft of the second synchronous pulley 122, and a second gear is provided on the rotating shaft of the drive motor 110. The first gear and the second gear are connected by a rack, so that the drive motor 110 can drive the second synchronous pulley 122 to rotate, thereby realizing the reciprocating motion of the sliding member 140 in the X-axis direction, which is conducive to realizing accurate, stable and efficient transmission.

[0067] There are many transmission connection methods in the art, and the transmission connection method is not limited in this application.

[0068] Therefore, the second synchronous pulley 122 is set as an active synchronous pulley driven by the driving motor, which reduces the number of wheels in the transmission gear train, thereby reducing the energy loss caused by the friction between the synchronous belt 130 and the wheels and improving the transmission efficiency.

[0069] According to some embodiments of the present application, the motion mechanism 100 further includes a tensioning mechanism for adjusting the tension on the synchronous belt 130 .

[0070] In some embodiments, the tensioning mechanism may be a mechanism capable of adjusting the position of the first synchronous pulley 121 in the X-axis direction. By adjusting the position of the first synchronous pulley 121 in the X-axis direction, the synchronous belt 130 is prevented from being loosened, thereby preventing the motion accuracy of the sliding member 140 from being affected.

[0071] Therefore, by setting a tensioning mechanism to adjust the tension of the synchronous belt, the tension is always maintained within a preset value range, which is beneficial to the stable operation of the motion mechanism 100 and can also increase the service life of the motion mechanism 100 to a certain extent.

[0072] The technical solution of the present application is further described below through a specific implementation method.

[0073] like Figure 1 As shown, the 3D printer 10 includes a printing platform (or hot bed) 11, a print head 12 movable relative to the printing platform 11, and a motion mechanism 100. The printing platform 11 may include a hot bed, and may further include a printing panel. The print head 12 includes a hot end, and may further include a driving extruder wheel 15. The driving extruder wheel 15 conveys the printing material 14 provided by the material tray 13 to the 3D printer 10 to the hot end. The hot end has a heating function. The hot end heats the printing material 14 to a molten state and extrude the molten printing material 14 onto the printing platform 11. The driving extruder wheel 15 includes an active extruder wheel and a driven extruder wheel arranged opposite to the active extruder wheel, and the printing material 14 passes between the active extruder wheel and the driven extruder wheel. The active extruder wheel rotates in a first direction to drive the printing material 14 to be conveyed to the hot end; the active extruder wheel rotates in an X-axis direction opposite to the first direction to drive the printing material 14 back to the material tray 13.

[0074] like Figure 2As shown, the motion mechanism 100 includes a driving motor 110, a synchronous belt 130, a sliding member 140, a first synchronous pulley 121 and a second synchronous pulley 122. The sliding member 140 is connected to the synchronous belt 130 so as to be driven by the synchronous belt 130 to reciprocate within a travel range extending linearly along the X-axis direction. The first synchronous pulley 121 is connected to the driving motor 110 in a transmission manner, the first synchronous pulley 121 is sleeved by the synchronous belt 130, and is arranged at the first end of the travel range of the sliding member 140. The second synchronous pulley 122 is connected to the driving motor 110 in a transmission manner, the second synchronous pulley 122 is sleeved by the synchronous belt 130, and is arranged at the second end of the travel range of the sliding member 140, and the second end is opposite to the first end. Among them, the driving motor 110 is arranged between the first end and the second end, thereby avoiding the driving motor 110 protruding from the travel range of the sliding member 140 in the X-axis direction, and improving the space utilization rate of the 3D printer 10 in the X-axis direction.

[0075] Further, the 3D printer 10 includes a gantry structure 16 and an X-axis frame body 170. The gantry structure 16 includes two columns spaced apart in the X-axis direction, the two columns are located at both ends of the gantry structure 16 in the X-axis direction, and extend upward along the Z-axis direction. The X-axis frame body 170 is a rigid structure extending along the X-axis direction, and a motor 110, a driving synchronous pulley 120, a first synchronous pulley 121, a second synchronous pulley 122, and a third synchronous pulley 160 are installed on the X-axis frame body 170. By movably connecting the X-axis frame body 170 with the two columns of the gantry structure 16, the X-axis frame body 170 can be moved up and down along the Z-axis direction. Among them, the column may include a screw rod, and the X-axis frame body is moved up and down by the screw rod.

[0076] The driving synchronous pulley 120 is located between the second synchronous pulley 122 and the third synchronous pulley 160. The angle a formed by the line connecting the driving synchronous pulley 120 and the second synchronous pulley 122 and the line connecting the driving synchronous pulley 120 and the third synchronous pulley 160 is 120 degrees, which is beneficial to prevent the synchronous belt from slipping during the transmission process and improves the operating stability of the motion mechanism 100 to a certain extent.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A 3D printer, characterized in that: include: Printing platform; a print head configured to be movable relative to the printing platform; as well as Sports organizations, including: Drive motor; Timing belt; a sliding member connected to the synchronous belt so as to be driven by the synchronous belt to move within a travel range extending in a straight line, a first synchronous pulley, drivingly connected to the driving motor, the first synchronous pulley being sleeved by the synchronous belt and arranged at a first end of the travel range of the sliding member; and A second synchronous pulley is drivingly connected to the driving motor, the second synchronous pulley is sleeved by the synchronous belt, and is arranged at a second end of the travel range of the sliding member, the second end being opposite to the first end; Wherein, the driving motor is arranged between the first end and the second end.

2. The 3D printer according to claim 1, characterized in that: The print head is mounted on the slide.

3. The 3D printer according to claim 2, characterized in that: The 3D printer is a 3D printer with a gantry structure, and the drive motor is arranged between two columns of the gantry structure.

4. The 3D printer according to claim 3, characterized in that: The motion mechanism also includes an X-axis frame, which can move along the Z-axis direction. The sliding member is slidably connected to the X-axis frame so that the print head can move along the X-axis direction relative to the X-axis frame. The travel range is the travel range in the X-axis direction. The first synchronous pulley, the second synchronous pulley and the drive motor are arranged on the X-axis frame.

5. The 3D printer according to claim 4, characterized in that: The printing platform includes a printing surface, the printing surface faces the print head and is located in a plane formed by the X-axis direction and the Y-axis direction, and the motion mechanism also includes: The Y-axis motion mechanism is configured to drive the printing platform to move along the Y-axis direction.

6. The 3D printer according to any one of claims 1 to 5, characterized in that: The motion mechanism also includes an active synchronous pulley, which is transmission-connected to the drive motor, is sleeved by the synchronous belt, and is used to drive the synchronous belt, and is arranged between the first synchronous pulley and the second synchronous pulley.

7. The 3D printer according to claim 6, characterized in that: The active synchronous pulley is coaxially arranged with the output shaft of the driving motor.

8. The 3D printer according to claim 6, characterized in that: The motion mechanism also includes a third synchronous pulley, which is transmission-connected to the drive motor. The third synchronous pulley is sleeved by the synchronous belt. The active synchronous pulley is located between the second synchronous pulley and the third synchronous pulley. The angle formed by the line connecting the active synchronous pulley and the second synchronous pulley and the line connecting the active synchronous pulley and the third synchronous pulley is between 30 degrees and 150 degrees.

9. The 3D printer according to any one of claims 1 to 5, characterized in that: The second synchronous belt pulley is an active synchronous belt pulley, and the second synchronous belt pulley is drivingly connected to the driving motor.

10. The 3D printer according to any one of claims 1 to 5, characterized in that: The motion mechanism also includes a tensioning mechanism for adjusting the tension on the synchronous belt.

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