Driving unit and 3D printing equipment applying same

Abstract

The embodiment of the utility model provides a driving unit and 3D printing equipment applying the same. The embodiment of the utility model provides a driving unit. The driving unit comprises a fixing part, a connecting frame and a driving assembly. The fixing part is used for fixing the driving unit; the connecting frame is movably connected with the fixing part, and the connecting frame is used for driving the construction module to move; the driving assembly is connected with the fixing part and the connecting frame and used for driving the connecting frame to move in at least one direction. The driving assembly comprises a first transmission piece and a second transmission piece which are meshed, the first transmission piece is connected with one of the fixing part and the connecting frame, and the second transmission piece is connected with the other one of the fixing part and the connecting frame. The 3D printing equipment comprises a construction module, a portal frame and the driving unit, the driving assembly is connected with the portal frame through the fixing part, and the construction module is connected with the connecting frame and is movably arranged relative to the portal frame.

Description

Technical Field

[0001] The present application relates to the field of 3D printing, and in particular to a drive unit and a 3D printing device using the same. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses digital model files as a basis, and uses special wax materials, powdered metals or plastics and other adhesive materials to print layers of materials to create three-dimensional objects. The printing material melts and is extruded at the nozzle, and finally takes shape. The installation accuracy of the drive unit directly affects its printing accuracy. In the prior art, the drive unit and the nozzle drive are usually installed separately based on the base as the assembly reference, which makes the relative accuracy of the drive unit and the nozzle drive vary greatly, directly affecting the relative position accuracy of the nozzle assembly and the building module, and directly affecting the printing accuracy of 3D printing. At the same time, the driving accuracy of the drive unit to the building module also directly affects the printing accuracy of 3D printing. How to solve the above problems is what those skilled in the art need to consider. Utility Model Content

[0003] In order to solve the problems in the prior art, the embodiments of the present application provide a driving unit with higher installation accuracy and higher printing accuracy, and a 3D printing device using the same.

[0004] An embodiment of the present application provides a driving unit for driving a building module for 3D printing, the driving unit comprising:

[0005] a fixing portion, configured to fix the driving unit;

[0006] a connecting frame, movably connected to the fixing portion, and configured to drive the building module to move;

[0007] a driving assembly, connected to the fixing portion and the connecting frame, respectively, and configured to drive the connecting frame to move in at least one direction;

[0008] The driving assembly includes a first transmission member and a second transmission member that are engaged with each other, the first transmission member being connected to one of the fixing portion and the connecting frame, and the second transmission member being connected to the other of the fixing portion and the connecting frame.

[0009] In one embodiment, the first transmission member includes first teeth, the second transmission member includes second teeth, and the first teeth are meshed with the second teeth.

[0010] In one embodiment, the first transmission member includes a rotating body and first teeth. The rotating body has a first outer surface that rotates continuously. The first teeth are provided on the first outer surface.

[0011] In one embodiment, the second transmission member includes an extension body and second teeth. The extension body has a second outer surface extending along the movement direction of the connecting frame. The second teeth are provided on the second outer surface.

[0012] In one embodiment, the driving assembly includes a driving member, the driving member is in transmission connection with the first transmission member, the first transmission member is in transmission connection with the second transmission member, and the driving member and the second transmission member are spaced apart.

[0013] In one embodiment, the first transmission member is rotatably connected to the connecting frame, and the second transmission member is fixedly connected to the fixing portion;

[0014] The connecting frame is configured to move along a first direction, and the connecting frame and the fixing portion are configured to be staggered along a second direction, wherein the first direction intersects with the second direction.

[0015] In one embodiment, the driving assembly includes:

[0016] at least two first transmission members, the at least two first transmission members being respectively provided on two sides of the connecting frame spaced apart along the second direction;

[0017] at least two second transmission members, the at least two second transmission members being respectively provided on two sides of the fixing portion spaced apart along the second direction;

[0018] The first transmission member and the second transmission member arranged on the same side along the second direction are engaged with each other.

[0019] In one embodiment, the driving assembly further includes:

[0020] a first guide member, wherein the first guide member and the first transmission member are respectively provided on two sides of the fixing portion spaced apart along the second direction;

[0021] a second guide member, wherein the second guide member and the second transmission member are respectively provided on two sides of the fixing portion spaced apart along the second direction;

[0022] The first transmission member and the second transmission member are arranged on the same side along the second direction and meshed with each other;

[0023] The first guide member and the second guide member are arranged on the same side along the second direction and are guided in cooperation with each other.

[0024] In one embodiment, the driving assembly includes:

[0025] One or more first transmission members, one first transmission member is located on one side of the fixing portion along the second direction, or a plurality of first transmission members are located on both sides of the fixing portion at intervals along the second direction;

[0026] One or more second transmission members, one second transmission member is located on one side of the fixing portion along the second direction, or a plurality of second transmission members are located on both sides of the fixing portion at intervals along the second direction;

[0027] at least two first guide members, the at least two first transmission members being respectively provided on two sides of the connecting frame spaced apart along the second direction, the first guide members and the first transmission members being staggered along a third direction intersecting the first direction and the second direction;

[0028] At least two second guide members, the at least two second transmission members are respectively provided on both sides of the fixing portion spaced apart along the second direction, and the second guide members and the second transmission members are staggered along the third direction;

[0029] The first transmission member and the second transmission member arranged on the same side along the second direction are configured to engage with each other, and the first guide member and the second guide member arranged on the same side along the second direction are configured to guide and cooperate.

[0030] An embodiment of the present application also provides a 3D printing device, which includes a building module, a gantry and a drive unit as described in any one of the aforementioned embodiments, wherein the drive assembly is connected to the gantry through the fixing portion, and the building module is connected to the connecting frame and is movably arranged relative to the gantry.

[0031] It is understandable that the drive unit of the present application is fixed by a fixing portion, which realizes the positioning of the drive unit during the installation process, improves its installation accuracy, and further improves its printing accuracy. The drive unit of the present application also includes a connecting frame movably connected to the fixing portion. The fixing portion and the connecting frame are connected by a first transmission member and a second transmission member arranged in an engaging manner of a drive assembly. The drive assembly is used to drive the connecting frame to move in at least one direction to achieve stable linear motion of the building module and improve its printing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A three-dimensional schematic diagram of the cooperation between the driving unit and the building module provided in one embodiment of the present application.

[0033] Figure 2 A three-dimensional schematic diagram of a driving unit provided in one embodiment of the present application.

[0034] Figure 3 A schematic diagram of a connecting frame of a drive unit provided in one embodiment of the present application.

[0035] Figure 4 A schematic diagram of a first transmission member of a drive assembly of a drive unit provided in one embodiment of the present application.

[0036] Figure 5 A schematic diagram of a second transmission member of a drive assembly of a drive unit provided in one embodiment of the present application.

[0037] Figure 6 A schematic diagram of the coordination of the drive components of a drive unit provided in one embodiment of the present application.

[0038] Figure 7 A schematic structural diagram of a drive unit provided in one embodiment of the present application.

[0039] Figure 8 A schematic structural diagram of a drive unit provided in another embodiment of the present application.

[0040] Figure 9 This is a schematic structural diagram of a drive unit provided in yet another embodiment of the present application.

[0041] Figure 10 A three-dimensional schematic diagram of the 3D printing device provided in an embodiment of the present application.

[0042] Figure 11 A partial cross-sectional schematic diagram of the 3D printing device provided in an embodiment of the present application.

[0043] Description of main component symbols

[0044] Drive unit 10

[0045] Fixing portion 11

[0046] Mounting hole 111

[0047] Limiting slot 112

[0048] Connecting frame 12

[0049] Frame 121

[0050] Connecting end 122

[0051] Drive assembly 13

[0052] First transmission member 131

[0053] First tooth 1311

[0054] Rotating body 1312

[0055] First outer surface 1313

[0056] Connection terminal 1314

[0057] Transmission gear 1315

[0058] Drive shaft 1316

[0059] Second transmission member 132

[0060] Second tooth 1321

[0061] Extension body 1322

[0062] Second outer surface 1323

[0063] Driving unit 133

[0064] Output 1331

[0065] Transmission unit 134

[0066] First guide member 135

[0067] Second guide member 136

[0068] 3D printing equipment 1

[0069] Base assembly 17

[0070] Building Module 18

[0071] Gantry 19

[0072] Framework 191

[0073] Positioning structure 192

[0074] Positioning base plate 1921

[0075] Positioning side panel 1922

[0076] First direction Y

[0077] Second direction X

[0078] The third direction Z

[0079] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0080] The following description will refer to the accompanying drawings to more fully describe the contents of this application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be interpreted as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make this application thorough and complete and to fully convey the scope of this application to those skilled in the art. Similar figure numerals represent identical or similar components. The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit this application. As used herein, unless the context clearly indicates otherwise, the singular forms "one", "an" and "the" are intended to also include plural forms. In addition, when used herein, "includes" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components and / or their groups. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. Furthermore, unless explicitly defined herein, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant art and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0081] Generally, 3D printing technology is a rapid prototyping technology that uses digital model files as a basis, and uses special wax materials, powdered metals or plastics and other adhesive materials to print layers of materials to create three-dimensional objects. The printing material melts and is extruded at the nozzle, and finally takes shape. The installation accuracy of the drive unit directly affects its printing accuracy. In the prior art, the drive unit and the nozzle drive are usually installed separately based on the base as the assembly reference, which makes the relative accuracy of the drive unit and the nozzle drive vary greatly, directly affecting the relative position accuracy of the nozzle assembly and the building module, and directly affecting the printing accuracy of 3D printing. At the same time, the driving accuracy of the drive unit to the building module also directly affects the printing accuracy of 3D printing. How to solve the above problems is what those skilled in the art need to consider.

[0082] Correspondingly, an embodiment of the present application provides a driving unit and a 3D printing device using the same. An embodiment of the present application provides a driving unit, which includes a fixing portion, a connecting frame and a driving assembly; the fixing portion is used to fix the driving unit; the connecting frame is movably connected to the fixing portion, and the connecting frame is used to drive the building module to move; the driving assembly is respectively connected to the fixing portion and the connecting frame, and is used to drive the connecting frame to move in at least one direction; the driving assembly includes a first and a second meshing transmission member, the first transmission member is connected to one of the fixing portion and the connecting frame, and the second transmission member is connected to the other of the fixing portion and the connecting frame. The 3D printing device includes a building module, a gantry and the driving unit, the driving assembly is connected to the gantry through the fixing portion, the building module is connected to the connecting frame and is movably arranged relative to the gantry.

[0083] Furthermore, the drive unit of the present application is fixed by a fixing portion, which enables the positioning of the drive unit during installation, improves its installation accuracy, and thus improves its printing accuracy. The drive unit of the present application also includes a connecting frame movably connected to the fixing portion. The fixing portion and the connecting frame are connected by a first transmission member and a second transmission member that are meshed with a drive assembly. The drive assembly is used to drive the connecting frame to move in at least one direction, achieving stable linear movement of the construction module and improving its printing accuracy.

[0084] The following describes exemplary embodiments with reference to the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0085] The specific implementation methods of the present application are further described in detail below with reference to the accompanying drawings.

[0086] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a driving unit 10 for driving a building module 18 for 3D printing. The driving unit 10 includes a fixing portion 11, a connecting frame 12, and a driving assembly 13. The fixing portion 11 is used to fix the driving unit 10; the connecting frame 12 is movably connected to the fixing portion 11, and the connecting frame 12 is used to drive the building module 18 to move; the driving assembly 13 is respectively connected to the fixing portion 11 and the connecting frame 12, and is used to drive the connecting frame 12 to move in at least one direction. The driving assembly 13 includes a first transmission member 131 and a second transmission member 132 that are engaged with each other. The first transmission member 131 is connected to one of the fixing portion 11 and the connecting frame 12, and the second transmission member 132 is connected to the other of the fixing portion 11 and the connecting frame 12.

[0087] In one embodiment, the fixing portion 11 may be the main positioning structure 192 of the drive unit 10. By attaching the fixing portion 11 to an external structure (e.g., the gantry 19 of the 3D printing device 1), the drive unit 10 can be mounted and fixed. The drive assembly 13 and the fixing portion 11 have a relatively fixed positional relationship and / or connection relationship. The installation and fixation of the fixing portion 11 can substantially stabilize the position of the drive assembly 13. The connecting frame 12 is used to connect the drive assembly 13 and the building module 18. The drive assembly 13 realizes the movement requirements of the building module 18, and the fixing portion 11 realizes the positioning requirements of the building module 18.

[0088] It is understood that the drive unit 10 of the present application is fixed by the fixing portion 11, which realizes the positioning of the drive unit 10 during the installation process, improves its installation accuracy, and thus improves its printing accuracy. The drive unit 10 of the present application also includes a connecting frame 12 that is movably connected to the fixing portion 11. The fixing portion 11 and the connecting frame 12 are connected by a first transmission member 131 and a second transmission member 132 that are engaged with the driving assembly 13. The driving assembly 13 is used to drive the connecting frame 12 to move in at least one direction, thereby realizing stable linear motion of the building module 18 and improving its printing accuracy.

[0089] For ease of understanding, the embodiments of the present application introduce a first direction Y, a second direction X, and a third direction Z for description. The first direction Y, the second direction X, and the third direction Z are three non-parallel directions in a spatial coordinate system. In subsequent embodiments, the first direction Y, the second direction X, and the third direction Z are described as three mutually perpendicular reference directions in a three-dimensional Cartesian coordinate system. The directions shown in the embodiments of the present application are used to help understand the relative positional relationship of the various components, but do not limit their specific directions.

[0090] Further integration Figure 3 As shown, in one embodiment, the fixing portion 11 is substantially a profile, or can be understood as being substantially plate-shaped. The length direction of the fixing portion 11 corresponds to the first direction Y, the width direction of the fixing portion 11 corresponds to the second direction X, and the thickness direction of the fixing portion 11 corresponds to the third direction Z.

[0091] In one embodiment, the connecting frame 12 is movably connected to the fixing portion 11 and can reciprocate along the first direction Y (length direction). Setting it along this direction can meet the movement range of the connecting frame 12 and the construction module 18, and the driving portion of the drive assembly 13 can be correspondingly set along the first direction Y. The fixing portion 11 can be provided with a guide structure on two opposite sides along the second direction X, and the connecting frame 12 can be guided and connected to the fixing portion 11 through the guide structure. Setting it along this direction can avoid interference with the movement of the connecting frame 12 along the first direction Y and achieve a mutually limited connection between the connecting frame 12 and the fixing portion 11. The fixing portion 11 has a plurality of mounting holes 111 along the third direction Z, which are used to connect the fixing portion 11 to the gantry 19 by bolts when the fixing portion 11 is stacked on the gantry 19 along the third direction Z. When the fixing portion 11 is arranged on the gantry 19 along the third direction Z (thickness direction), setting it along this direction can help reduce the overall thickness of the device.

[0092] Further integration Figure 1 and Figure 2 As shown, in one embodiment, the connecting frame 12 is used to connect the fixing portion 11 and the building module 18. The driving assembly 13 drives the connecting frame 12 to move, thereby driving the building module 18 to move. The connecting frame 12 includes a frame 121 extending generally along a plane defined by the first direction Y and the second direction X, and a connecting end 122 connected to the frame 121 and protruding along the third direction Z toward a side away from the fixing portion 11 (or, understandably, toward the side where the forming platform is located). The frame 121 is configured to connect to the driving assembly 13, and the connecting end 122 is configured to connect to the building module 18.

[0093] Further integration Figures 4 and 5 As shown, in one embodiment, the first transmission member 131 includes a first tooth 1311 , and the second transmission member 132 includes a second tooth 1321 , and the first tooth 1311 is meshed with the second tooth 1321 .

[0094] It can be understood that the first transmission member 131 and the second transmission member 132 are engaged with each other through the first teeth 1311 and the second teeth 1321. When at least one of the first transmission member 131 and the second transmission member 132 has a tendency to rotate or slide compared to the other, the engaged first teeth 1311 and the second teeth 1321 bite into each other and push the other of the first transmission member 131 and the second transmission member 132 to move along the arrangement direction of the teeth.

[0095] In this embodiment, the first teeth 1311 and / or the second teeth 1321 may be selected with a gear precision of level 0 to level 13, and may further be level 3 to level 5 or level 5 to level 8.

[0096] As can be understood, the drive assembly 13 transmits the power by meshing, which can avoid the problem of looseness and tightness variation that may be encountered in conventional belt transmissions or the problem of swinging that may be encountered in screw transmissions, thereby ensuring stable and reliable transmission. Furthermore, the use of high-precision teeth can also ensure high transmission accuracy.

[0097] Further integration Figure 4 As shown, in one embodiment, the first transmission member 131 includes a rotating body 1312 and first teeth 1311. The rotating body 1312 has a first outer surface 1313 that rotates continuously, and the first teeth 1311 are disposed on the first outer surface 1313.

[0098] In this embodiment, the first transmission member 131 is a rotatable gear. The rotating body 1312 is a cylindrical, circular, or truncated cone-shaped body of the rotatable gear. The rotating body 1312 has at least one rotatably connected first outer surface 1313. If the rotating body 1312 is cylindrical, the first outer surface 1313 is the side surface of the cylinder. Specifically, the rotating body 1312 can be rotationally symmetrical about a rotational axis, with the first outer surface 1313 being a closed surface surrounding the rotational axis when the rotating body rotates along the rotational axis.

[0099] Further integration Figure 5 As shown, in one embodiment, the second transmission member 132 includes an extension body 1322 and second teeth 1321. The extension body 1322 has a second outer surface 1323 extending along the movement direction of the connecting frame 12, and the second teeth 1321 are provided on the second outer surface 1323.

[0100] In this embodiment, the second transmission member 132 is a rack. The extension body 1322 is an elongated carrier extending along the first direction Y. The extension body 1322 has at least one second outer surface 1323 extending along the first direction Y. The second teeth 1321 are sequentially arranged on the second outer surface 1323.

[0101] It is understood that the second transmission member 132 can be configured to be fixed, and the first transmission member 131 can be configured to rotate. The driving portion 133 drives the first transmission member 131 to rotate, and the first teeth 1311 rotate along with the rotating body 1312 and move along the extension direction of the second teeth 1321, thereby enabling the first transmission member 131 to move in the first direction Y relative to the second transmission member 132.

[0102] Further integration Figure 6As shown, in one embodiment, the driving assembly 13 further includes a driving portion 133. The driving portion 133 is drivingly connected to the first transmission member 131, and the first transmission member 131 is drivingly connected to the second transmission member 132. The driving portion 133 and the second transmission member 132 are spaced apart.

[0103] As will be understood, the drive unit 133 is a power source for driving, such as a motor capable of outputting rotational torque. The first and second transmission members 131, 132 are mechanisms capable of converting the output of the drive unit 133 into linear motion of the connecting frame 12. The first and second transmission members 131, 132 are configured to move along a first direction Y, which corresponds to the long side of the fixing portion 11, thereby achieving a relatively large travel within a relatively limited space.

[0104] In one embodiment, the drive unit 133 is in transmission connection with the first transmission member 131, and the second transmission member 132 is in transmission connection with the first transmission member 131. When the first transmission member 131 is connected to the connecting frame 12, the drive unit 133 is correspondingly connected to the connecting frame 12; when the first transmission member 131 is connected to the fixing portion 11, the drive unit 133 is correspondingly connected to the fixing portion 11. In the subsequent embodiments, the drive unit 133 and the first transmission member 131 are both provided on the connecting frame 12 as an example. In this embodiment, the drive unit 133 is provided on the side of the frame 121 facing away from the fixing portion 11, and the first transmission member 131 is provided on the side of the frame 121 facing the fixing portion 11.

[0105] In one embodiment, the driving assembly 13 further includes a transmission portion 134 , and the transmission portion 134 is used to connect the first transmission member 131 with the driving portion 133 .

[0106] In this embodiment, the transmission portion 134 may be a gear transmission structure. The output end 1331 of the driving portion 133 and the first transmission member 131 both have teeth, and the teeth of the transmission portion 134 mesh with the teeth of the first transmission member 131 and the output end 1331, respectively. For example, the first transmission member 131 has a connecting end 1314 located on a side of the rotating body 1312 that is not provided with the first teeth 1311. The connecting end 1314 of the rotating body 1312 may be connected to a transmission gear 1315 via a transmission shaft 1316. The transmission gear 1315 and the first transmission member 131 may be arranged to overlap along the third direction Z, and the transmission shaft 1316 may be arranged parallel to the rotation axis of the first transmission member 131. The output end 1331 of the driving part 133 is respectively connected to the multiple transmission gears 1315 through multiple transmission parts 134, so that the multiple transmission gears 1315 can rotate. The multiple transmission gears 1315 are fixedly connected to the first transmission member 131 through the transmission shaft 1316 to drive the first transmission member 131 to rotate synchronously, thereby realizing the driving of the first transmission member 131 by the transmission part 134; the transmission part 134 can be hidden in the connecting frame 12.

[0107] It will be appreciated that this embodiment illustrates the transmission portion 134 as a single gear arrangement. In other embodiments, the transmission portion 134 may also comprise another planetary gear structure, a speed reducer structure, or a transmission rod with helical teeth on both ends. Those skilled in the art will appreciate that a transmission portion 134 with a similar structure can achieve transmission between the drive portion 133 and the first transmission member 131. By adjusting the arrangement and transmission form of the transmission portion 134, the rotational direction of the multiple first transmission members 131 relative to the output end 1331 can be adjusted to achieve appropriate rotational drive. The transmission portion 134 can be constructed using known and feasible components, and its specific parameters and structure are not described in detail here.

[0108] Further integration Figures 7 to 9 As shown, in one embodiment, the first transmission member 131 is rotatably connected to the connecting frame 12, and the second transmission member 132 is fixedly connected to the fixing portion 11. The connecting frame 12 is configured to move along a first direction Y, and the connecting frame 12 and the fixing portion 11 are configured to be staggered along a second direction X, with the first direction Y intersecting the second direction X.

[0109] Further integration Figure 7 As shown, in one embodiment, the drive assembly 13 includes at least two first transmission members 131 and at least two second transmission members 132. The at least two first transmission members 131 are respectively provided on two sides of the connecting frame 12 spaced apart along the second direction X; the at least two second transmission members 132 are respectively provided on two sides of the fixing portion 11 spaced apart along the second direction X; the first transmission members 131 and the second transmission members 132 arranged on the same side along the second direction X engage with each other.

[0110] It can be understood that in this embodiment, at least two first transmission members 131 are respectively connected to the two second transmission members 132 along the second direction X, and at least two first transmission members 131 are constructed to be able to rotate synchronously, so that both sides of the connecting frame 12 are driven along the first direction Y at the same time, thereby improving the movement stability of the connecting frame 12.

[0111] Further integration Figure 8 As shown, in one embodiment, the drive assembly 13 includes, in addition to the first transmission member 131 and the second transmission member 132, a first guide member 135 and a second guide member 136. The first guide member 135 and the first transmission member 131 are respectively disposed on opposite sides of the fixed portion 11 spaced apart along the second direction X; the second guide member 136 and the second transmission member 132 are respectively disposed on opposite sides of the fixed portion 11 spaced apart along the second direction X. The first transmission member 131 and the second transmission member 132 are disposed on the same side in the second direction X and mesh with each other; the first guide member 135 and the second guide member 136 are disposed on the same side in the second direction X and guide and cooperate with each other.

[0112] It can be understood that in this embodiment, the first transmission member 131 and the second transmission member 132 located on one side of the connecting frame 12 cooperate to drive, and the first guide member 135 and the second guide member 136 located on the other side of the connecting frame 12 cooperate to guide, so as to improve the movement stability of the connecting frame 12.

[0113] Further integration Figure 9 As shown, in one embodiment, the driving assembly 13 includes one or more first transmission members 131 , one or more second transmission members 132 , at least two first guide members 135 and at least two second guide members 136 .

[0114] In one embodiment, a first transmission member 131 is located on one side of the fixed portion 11 along the second direction X, or a plurality of first transmission members 131 are located on both sides of the fixed portion 11 at intervals along the second direction X; a second transmission member 132 is located on one side of the fixed portion 11 along the second direction X, or a plurality of second transmission members 132 are located on both sides of the fixed portion 11 at intervals along the second direction X; the first transmission member 131 and the second transmission member 132 arranged on the same side along the second direction X are configured to engage with each other.

[0115] In one embodiment, at least two first transmission members 131 are respectively provided on both sides of the connecting frame 12 spaced apart along the second direction X, the first guide member 135 and the first transmission member 131 are staggered along the third direction Z, and the third direction Z intersects with the first direction Y and the second direction X; at least two second guide members 136 and at least two second transmission members 132 are respectively provided on both sides of the fixing portion 11 spaced apart along the second direction X, and the second guide members 136 and the second transmission members 132 are staggered along the third direction Z; the first guide member 135 and the second guide member 136 provided on the same side along the second direction X are configured to guide and cooperate.

[0116] It is understood that the meshing first transmission member 131 and the second transmission member 132 can be disposed on one or both sides of the connecting frame 12; similarly, the guiding and cooperating first guide member 135 and the second guide member 136 can also be disposed on one or both sides of the fixing portion 11. The first transmission member 131 and the second transmission member 132 are disposed on the same side along the third direction Z, while the first guide member 135 and the second guide member 136 are disposed on another layer along the third direction Z. This ensures a stable guiding effect while preventing mutual interference.

[0117] Further integration Figure 8 and Figure 9As shown, it can be understood that the second guide member 136 and the first guide member 135 can be guided and matched along the second direction X, so that the second guide member 136 and the first guide member 135 can abut against each other. At the same time, the second guide member 136 and the first guide member 135 can slide along the first direction Y, thereby achieving relative sliding guidance between the connecting frame 12 and the fixing portion 11 along the first direction Y.

[0118] In one embodiment, the second guide member 136 and the first guide member 135 can cooperate in various ways. For example, the second guide member 136 can be an optical axis protruding along the second direction X, and the first guide member 135 can be a rotatable pulley having a groove extending along the second direction X. Alternatively, the second guide member 136 can be a structure having a recess along the second direction X, and the first guide member 135 can be a rotatable pulley having an outer peripheral edge protruding along the second direction X. Alternatively, both the second guide member 136 and the first guide member 135 can be structures having recesses extending along the second direction X and can engage with each other.

[0119] In this embodiment, a recessed retaining groove 112 is defined on each side edge of the fixing portion 11, spaced apart along the second direction X. The length or extension direction of the retaining groove 112 corresponds to the first direction Y. A first guide member 135 is a pulley with an indentation. The first guide member 135 is positioned on a side of the connecting frame 12 near the fixing portion 11 along the third direction Z. Multiple first guide members 135 are rotatably connected to the connecting frame 12. A second guide member 136 is an optical axis, one of which is positioned in each retaining groove 112. The exposed portion of the optical axis, uncovered by the retaining groove 112, is in sliding contact with the pulley.

[0120] As can be appreciated, the provision of the second guide member 136 and the first guide member 135 in a guiding relationship within the drive unit 10 effectively enhances the stability of the drive unit 10 in driving the building module 18 along the first direction Y, thereby improving the accuracy of 3D printing. Furthermore, the co-location of the first guide member 135 and the fixing portion 11 along the second direction X reduces the overall thickness of the drive unit 10 along the third direction Z.

[0121] Further integration Figures 10 and 11 As shown, an embodiment of the present application further provides a 3D printing device 1, which includes a building module 18, a gantry 19 and a driving unit 10 as any one of the aforementioned embodiments, the driving component 13 is connected to the gantry 19 through a fixing portion 11, and the building module 18 is connected to the connecting frame 12 and is movably arranged compared to the gantry 19.

[0122] In one embodiment, the gantry 19 includes an integrally formed frame 191 and a positioning structure 192, which is disposed on the bottom edge of the frame 191. The positioning structure 192 includes a positioning base plate 1921, which is fixedly connected to the frame 191. The fixing portion 11 is disposed on the surface of the positioning base plate 1921 and is connected to the positioning base plate 1921.

[0123] As can be understood, the positioning structure 192 is integrally formed on the gantry 19, eliminating the need for redundant installation between the frame 191 and the positioning structure 192, resulting in a higher precision of the positioning structure 192 compared to the frame 191. The drive unit 10 is mounted and positioned on the positioning structure 192 via the fixing portion 11, enabling direct positioning of the drive unit 10, ensuring the positional accuracy of the drive unit 10 and the build module 18 relative to the gantry 19, and thereby improving printing accuracy.

[0124] In one embodiment, the positioning structure 192 further includes positioning side plates 1922 . The two positioning side plates 1922 are respectively disposed on opposite sides of the positioning base plate 1921 along the second direction X to shield the side surfaces of the connecting frame 12 .

[0125] In one embodiment, the 3D printing device 1 further includes a base assembly 17 , and the base assembly 17 is connected to the gantry 19 via the driving unit 10 .

[0126] It is understood that the base assembly 17 can be used to accommodate other components of the 3D printing device 1, such as a display, control circuit, etc. The drive unit 10 is connected and positioned with the gantry 19 via the positioning structure 192. The base assembly 17 is connected to the drive unit 10 and then to the gantry 19, thereby reducing installation difficulty and improving printing accuracy.

[0127] In this embodiment, to improve the space utilization of the 3D printing apparatus 1, the base assembly 17 and the drive unit 10 are embedded. That is, the drive unit 10 and the base assembly 17 are respectively connected and positioned with the gantry 19. The second drive assembly 13 and the base assembly 17 have approximately the same thickness along the third direction Z. The drive unit 10 and the base assembly 17 are also disposed substantially on the same layer, so that the drive unit 10 is embedded within the base assembly 17, saving space and improving the aesthetics.

[0128] The specific embodiments of the present application have been described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and substitutions may be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. Such modifications and substitutions are intended to fall within the scope of the present application.

Claims

1. A driving unit for driving a building module for 3D printing, characterized in that: The driving unit includes: a fixing portion, configured to fix the driving unit; a connecting frame, movably connected to the fixing portion, and configured to drive the building module to move; a driving assembly, connected to the fixing portion and the connecting frame, respectively, and configured to drive the connecting frame to move in at least one direction; The drive assembly includes a first transmission member and a second transmission member that are engaged with each other, the first transmission member being connected to one of the fixing portion and the connecting frame, and the second transmission member being connected to the other of the fixing portion and the connecting frame.

2. The drive unit according to claim 1, wherein: The first transmission member includes first teeth, the second transmission member includes second teeth, and the first teeth are meshed with the second teeth.

3. The drive unit according to claim 1, wherein: The first transmission member includes a rotating body and first teeth. The rotating body has a first outer surface that rotates continuously. The first teeth are provided on the first outer surface.

4. The drive unit according to claim 1, wherein: The second transmission member includes an extending body and second teeth. The extending body has a second outer surface extending along the movement direction of the connecting frame. The second teeth are provided on the second outer surface.

5. The drive unit according to claim 1, wherein: The driving assembly includes a driving member, the driving member is in driving connection with the first transmission member, the first transmission member is in driving connection with the second transmission member, and the driving member and the second transmission member are spaced apart.

6. The drive unit according to claim 1, wherein: The first transmission member is rotatably connected to the connecting frame, and the second transmission member is fixedly connected to the fixing portion; The connecting frame is configured to move along a first direction, and the connecting frame and the fixing portion are configured to be staggered along a second direction, wherein the first direction intersects with the second direction.

7. The drive unit according to claim 6, wherein: The drive assembly includes: at least two of the first transmission members, the at least two of the first transmission members being respectively provided on two sides of the connecting frame spaced apart along the second direction; at least two second transmission members, the at least two second transmission members being respectively provided on two sides of the fixing portion spaced apart along the second direction; The first transmission member and the second transmission member arranged on the same side along the second direction are engaged with each other.

8. The drive unit according to claim 6, wherein: The drive assembly further includes: a first guide member, wherein the first guide member and the first transmission member are respectively provided on two sides of the fixing portion spaced apart along the second direction; a second guide member, wherein the second guide member and the second transmission member are respectively provided on two sides of the fixing portion spaced apart along the second direction; The first transmission member and the second transmission member are arranged on the same side along the second direction and meshed with each other; The first guide member and the second guide member are arranged on the same side along the second direction and are guided in cooperation with each other.

9. The drive unit according to claim 6, wherein: The drive assembly includes: One or more first transmission members, one first transmission member is located on one side of the fixing portion along the second direction, or a plurality of first transmission members are located on both sides of the fixing portion at intervals along the second direction; One or more second transmission members, one second transmission member is located on one side of the fixing portion along the second direction, or a plurality of second transmission members are located on both sides of the fixing portion at intervals along the second direction; at least two first guide members, and at least two first transmission members are respectively provided on both sides of the connecting frame spaced apart along the second direction, the first guide members and the first transmission members being staggered along a third direction intersecting the first direction and the second direction; At least two second guide members, at least two second transmission members are respectively arranged on both sides of the fixing portion along the second direction, and the second guide members and the second transmission members are staggered along the third direction. The first transmission member and the second transmission member arranged on the same side along the second direction are configured to engage with each other, and the first guide member and the second guide member arranged on the same side along the second direction are configured to guide and cooperate.

10. A 3D printing device, characterized in that: It includes a building module, a gantry and a driving unit according to any one of claims 1 to 9, wherein the driving assembly is connected to the gantry via the fixing portion, and the building module is connected to the connecting frame and is movably arranged relative to the gantry.

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