Base suite and 3D printing device applying same

Abstract

The embodiment of the utility model provides a base suite and a 3D printing device applying the same. The base suite is used for being matched with a transmission wheel and a synchronous belt which are in transmission connection, and the base suite comprises a base support and a tensioning assembly. The tensioning assembly comprises a transmission connecting piece, a first tensioning adjusting piece, a second tensioning adjusting piece and an elastic piece, the transmission connecting piece comprises a transmission body and a limiting protrusion which are connected, the transmission body and the base support are matched to form a driving cavity, and the limiting protrusion and the second tensioning adjusting piece are arranged in the driving cavity at intervals; the elastic piece is arranged between the limiting protrusion and the second tensioning adjusting piece in the first direction, the first tensioning adjusting piece and the second tensioning adjusting piece are rotationally connected to drive the second tensioning adjusting piece to compress the elastic piece in the first direction, and the elastic piece pushes the limiting protrusion to drive the transmission body to move in the first direction. The transmission body is used for being fixedly connected with a transmission wheel.

Description

Technical Field

[0001] This application relates to the field of 3D printing, and particularly to a base kit and a 3D printing device using the same. Background Art

[0002] 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies special wax materials, powdered metals, plastics, or other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling (FDM) technology is one of the main 3D printing technologies. In this technology, a hot-melt filament is heated and melted, then extruded from a nozzle and deposited on a forming platform or the previously solidified material of the previous layer. When the temperature is lower than the solidification temperature of the filament, it begins to solidify and form, ultimately generating a physical object. For the 3D printing process of FDM technology characterized by layer-by-layer accumulation, controlling the accuracy of the movement of the forming platform directly determines the success or failure of the model deposition and forming on the forming platform, and thus determines the success or failure and accuracy of the entire model printing. It is a relatively common driving method in 3D printing to use a synchronous belt and a driving wheel to cooperate to rotate the forming platform. However, this method has an obvious defect. After the 3D printing device works for a long time, the synchronous belt may be stretched, making the connection between the synchronous belt and the driving wheel become loose and reducing the printing accuracy.

[0003] How to solve the above problems is what those skilled in the art need to consider. Summary of the Utility Model

[0004] To solve the problems in the prior art, an embodiment of this application provides a base kit and a 3D printing device using the same.

[0005] An embodiment of this application provides a base kit, which is used in cooperation with a driving wheel and a synchronous belt for transmission connection. The base kit includes a base bracket and a tensioning assembly. The tensioning assembly includes a transmission connecting member, a first tensioning adjustment member, a second tensioning adjustment member, and an elastic member. The transmission connecting member includes a connected transmission main body and a limiting protrusion. The transmission main body and the base bracket cooperate to form a driving cavity. The limiting protrusion and the second tensioning adjustment member are spaced in the driving cavity. The elastic member is arranged between the limiting protrusion and the second tensioning adjustment member along a first direction. The first tensioning adjustment member is rotationally connected to the second tensioning adjustment member to drive the second tensioning adjustment member to compress the elastic member along the first direction, so that the elastic member pushes the limiting protrusion to drive the transmission main body to move along the first direction. Wherein, the transmission main body is used for fixedly connecting with the driving wheel.

[0006] In one embodiment, the second tension adjusting member is threadedly connected to the first tension adjusting member. The first tension adjusting member is used for rotation to drive the second tension adjusting member, and the second tension adjusting member is used for moving in the driving cavity along the first direction.

[0007] In one embodiment, the first tension adjusting member extends into the driving cavity. The limiting protrusion and the elastic member are movably sleeved outside the first tension adjusting member. The first tension adjusting member sequentially passes through the limiting protrusion, the elastic member, and the second tension adjusting member along the first direction.

[0008] In one embodiment, the second tension adjusting member is plate-shaped, the first direction corresponds to the thickness direction of the plate-shaped second tension adjusting member, a threaded hole for the first tension adjusting member to pass through is formed in the middle of the second tension adjusting member, and the periphery of the second tension adjusting member is non-circular arc-shaped.

[0009] In one embodiment, the base bracket includes a bottom wall and a limiting wall connected to each other. The periphery of the second tension adjusting member includes a plurality of side surfaces connected in sequence. Any two adjacent side surfaces form an included angle. At least two spaced side surfaces respectively abut against the surface of the limiting wall facing the driving cavity, at least one side surface abuts against the surface of the bottom wall facing the driving cavity, and at least one side surface abuts against the surface of the transmission main body facing the driving cavity.

[0010] In one embodiment, the base bracket includes a bottom wall, a limiting wall, and a side wall. The bottom wall is connected to the limiting wall, the side wall is connected to the bottom wall, the limiting wall is connected to the side wall, the side wall is provided with a first through hole, the first tension adjusting member includes a rod portion and a nut portion, the rod portion extends into the driving cavity through the first through hole, and the nut portion is located on the side of the side wall away from the driving cavity.

[0011] In one embodiment, the limiting protrusion is provided with a second through hole penetrating along the first direction. The first tension adjusting member passes through the limiting protrusion through the second through hole and is connected to the second tension adjusting member.

[0012] In one embodiment, the base bracket includes a bottom wall and a limiting wall connected to each other. The transmission main body includes a transmission portion and a connecting portion. The connecting portion and the limiting protrusion are respectively arranged on opposite sides of the transmission portion and are connected to the transmission portion. The transmission portion cooperates with the bottom wall and the limiting wall to form the driving cavity. The connecting portion is used for connecting the transmission wheel, and the synchronous belt is connected to the transmission wheel and extends along the first direction.

[0013] In one embodiment, two circular holes are formed in the transmission part, and the two circular holes are located on opposite sides of the transmission part. Two waist-shaped holes are formed in the bottom wall, and the two waist-shaped holes are located on opposite sides of the limiting wall. Each waist-shaped hole corresponds to one of the circular holes. The length of the waist-shaped hole in the first direction is greater than the length of the circular hole in the first direction. The tensioning assembly further includes a locking member, and one locking member passes through one waist-shaped hole and one circular hole.

[0014] The embodiment of the present application further provides a 3D printing device, which includes a nozzle kit, a driving kit, and the base kit as described in any one of the foregoing embodiments. The driving kit is connected to the base kit and the nozzle kit.

[0015] It can be understood that the base kit of the present application is used in cooperation with a transmission wheel and a synchronous belt for transmission connection. The synchronous belt is in transmission connection with the transmission wheel. The transmission wheel is connected to the base bracket through a tensioning assembly and can be tensioned and adjusted to ensure the tension of the synchronous belt and improve the printing quality. The transmission main body and the base bracket cooperate to form a driving cavity. The limiting protrusion and the second tensioning adjustment member are arranged at intervals in the driving cavity. The elastic member is clamped between the limiting protrusion and the second tensioning adjustment member in the first direction. The driving cavity houses the second tensioning adjustment member and limits the periphery of the second tensioning adjustment member, so that the second tensioning adjustment member can move in the first direction under the drive of the first tensioning adjustment member. The second tensioning adjustment member cooperates with the limiting protrusion to compress the elastic member, so that the elastic member can further push the transmission main body to drive the transmission wheel to move in the first direction to tension the synchronous belt. Through the mutual cooperation of the first tensioning adjustment member and the second tensioning adjustment member, after compressing the elastic member, the elastic member is used to push the transmission connecting member to drive the transmission wheel to move, which can not only actively adjust the tension of the synchronous belt by controlling the first tensioning adjustment member, but also improve the adjustment accuracy through the dynamic tensioning adjustment between the elastic member and the synchronous belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the base kit provided by the embodiment of the present application.

[0017] Figure 2 It is a partial three-dimensional schematic diagram of the base assembly of the base kit provided by the embodiment of the present application.

[0018] Figure 3 It is Figure 2 A partial cross-sectional schematic diagram along the III-III direction.

[0019] Figure 4 It is Figure 2 A partial enlarged schematic diagram corresponding to the IV area.

[0020] Figure 5Partial perspective view of the base bracket of the base kit provided by the embodiment of the present application.

[0021] Figure 6 Schematic view of the state of the tensioning assembly of the base kit provided by the embodiment of the present application in cooperation with the drive wheel and the timing belt.

[0022] Figure 7 Schematic view of the state of the tensioning assembly of the base kit provided by the embodiment of the present application in cooperation with the drive wheel.

[0023] Figure 8 Schematic view of the state of the tensioning assembly of the base kit provided by the embodiment of the present application in cooperation with the drive wheel.

[0024] Figure 9 Stereo view of the 3D printing device provided by the embodiment of the present application.

[0025] Description of main component symbols

[0026] Base kit 10

[0027] Base bracket 11

[0028] Receiving cavity 110

[0029] Bottom wall 111

[0030] Limiting wall 112

[0031] Side wall 113

[0032] First through hole 114

[0033] Waist-shaped hole 115

[0034] Adjusting bump 116

[0035] Tensioning assembly 12

[0036] Drive connecting piece 121

[0037] Drive main body 1210

[0038] Drive part 1211

[0039] Connecting part 1212

[0040] Round hole 1213

[0041] Limiting protrusion 1214

[0042] Second through hole 1215

[0043] First tensioning adjustment piece 122

[0044] Rod part 1221

[0045] Nut portion 1222

[0046] Second tension adjusting member 123

[0047] Threaded hole 1231

[0048] Side surface 1232

[0049] Elastic member 124

[0050] Locking member 125

[0051] Drive cavity 13

[0052] Drive wheel 14

[0053] Timing belt 15

[0054] Drive motor 16

[0055] First direction X

[0056] 3D printing device 1

[0057] Nozzle kit 17

[0058] Drive kit 18

[0059] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0060] The following description will describe the content of the present application more comprehensively with reference to the drawings. The exemplary embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals denote the same or similar components. The terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms as well. Further, when used herein, "comprises" and / or "comprising" and / or "has", integers, steps, operations, components and / or components, but does 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 one of ordinary skill in the art to which this application belongs. Further, terms such as those defined in a general dictionary 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 idealized or overly formal meanings.

[0061] Generally, 3D printing technology is a rapid prototyping technology that is based on digital model files and uses special wax materials, powdered metals, plastics, or other bondable materials to manufacture three-dimensional objects by printing layer upon layer of materials. Fused deposition modeling (FDM) is one of the main 3D printing technologies. In this technology, a thermoplastic filament is heated and melted and then extruded from a nozzle, deposited on a forming platform or the previously solidified material of the previous layer. When the temperature is lower than the solidification temperature of the filament, it begins to solidify and form, and finally a physical object is generated. For the 3D printing process of the FDM technology characterized by layer-by-layer accumulation, controlling the accuracy of the movement of the forming platform directly determines the success or failure of the model deposition and formation on the forming platform, and thus determines the success or failure and accuracy of the entire model printing. The synchronous belt and the driving wheel cooperate to rotate the forming platform, which is a relatively common driving method in 3D printing. However, this method has an obvious defect. After the 3D printing device works for a long time, the synchronous belt may be stretched, making the connection between the synchronous belt and the driving wheel become loose and reducing the printing accuracy.

[0062] Correspondingly, the embodiment of the present application provides a base kit and a 3D printing device applying the same. The base kit is used in cooperation with a driving wheel and a synchronous belt for transmission connection, and the base kit includes a base bracket and a tensioning assembly. The tensioning assembly includes a transmission connecting member, a first tensioning adjustment member, a second tensioning adjustment member, and an elastic member. The transmission connecting member includes a connected transmission main body and a limiting protrusion. The transmission main body and the base bracket cooperate to form a driving cavity. The limiting protrusion and the second tensioning adjustment member are spaced in the driving cavity. The elastic member is arranged in the first direction between the limiting protrusion and the second tensioning adjustment member. The first tensioning adjustment member is rotatably connected to the second tensioning adjustment member to drive the second tensioning adjustment member to compress the elastic member in the first direction, so that the elastic member pushes the limiting protrusion to drive the transmission main body to move in the first direction. Among them, the transmission main body is used for fixedly connecting with the driving wheel.

[0063] Furthermore, the base kit of the present application is used in cooperation with a driving pulley and a synchronous belt that are drivingly connected. The synchronous belt is drivingly connected to the driving pulley, and the driving pulley is connected to the base bracket through a tensioning assembly and can be tensioned and adjusted to ensure the tension of the synchronous belt and improve the printing quality. The driving body and the base bracket cooperate to form a driving cavity. The limiting protrusion and the second tensioning adjustment member are spaced apart in the driving cavity. The elastic member is clamped between the limiting protrusion and the second tensioning adjustment member along the first direction. The driving cavity houses the second tensioning adjustment member and limits the periphery of the second tensioning adjustment member, so that the second tensioning adjustment member can move along the first direction under the drive of the first tensioning adjustment member. The second tensioning adjustment member cooperates with the limiting protrusion to compress the elastic member, so that the elastic member can further push the driving body to drive the driving pulley to move along the first direction to tension the synchronous belt. Through the mutual cooperation of the first tensioning adjustment member and the second tensioning adjustment member, after compressing the elastic member, the elastic member is used to push the driving connecting member to drive the driving pulley to move. It is possible to actively adjust the tension of the synchronous belt by controlling the first tensioning adjustment member, and it is also possible to improve the accuracy of adjustment through the dynamic tensioning adjustment between the elastic member and the synchronous belt.

[0064] Those skilled in the art can understand that "3D printing" refers to a technology that constructs an object by layer-by-layer printing based on a digital model file and using powdery metals or plastic and other bondable materials.

[0065] The following content will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference 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.

[0066] The following will further describe in detail the specific implementation manners of the present application with reference to the accompanying drawings.

[0067] As Figures 1 to 8 shown, an embodiment of the present application provides a base kit 10, which is used in cooperation with a driving pulley 14 and a synchronous belt 15 that are drivingly connected. The base kit 10 includes a base bracket 11 and a tensioning assembly 12. The base bracket 11 forms a receiving cavity 110 with a receiving function. The tensioning assembly 12, the driving pulley 14, and the synchronous belt 15 are all disposed in the receiving cavity 110. The synchronous belt 15 is sleeved outside the driving pulley 14 to achieve synchronous transmission. The driving pulley 14 is movably connected to the base kit 10 through the tensioning assembly 12 for tensioning the synchronous belt 15.

[0068] In one embodiment, the tensioning assembly 12 includes a transmission connecting member 121, a first tensioning adjusting member 122, a second tensioning adjusting member 123, and an elastic member 124. The transmission connecting member 121 includes a connected transmission main body 1210 and a limiting protrusion 1214. The transmission main body 1210 cooperates with the base bracket 11 to form a driving cavity 13. The limiting protrusion 1214 and the second tensioning adjusting member 123 are spaced in the driving cavity 13. The elastic member 124 is disposed between the limiting protrusion 1214 and the second tensioning adjusting member 123 along the first direction X. The first tensioning adjusting member 122 is rotatably connected to the second tensioning adjusting member 123 to drive the second tensioning adjusting member 123 to compress the elastic member 124 along the first direction X, so that the elastic member 124 pushes the limiting protrusion 1214 to drive the transmission main body 1210 to move along the first direction X. Among them, the transmission main body 1210 is used for fixedly connecting with the transmission wheel 14.

[0069] In this embodiment, the base bracket 11 includes a bottom wall 111 and a limiting wall 112, and the limiting wall 112 is connected to the bottom wall 111. The bottom wall 111 and the transmission main body 1210 are spaced on two opposite sides of the limiting wall 112. Two opposite surfaces of the limiting wall 112 are respectively in contact with the bottom wall 111 and the transmission main body 1210. The limiting wall 112 itself has a semi-enclosing structure, and the transmission main body 1210 and the base bracket 11 cooperate to form the driving cavity 13. The limiting protrusion 1214 is disposed on one side of the transmission main body 1210 and extends into the driving cavity 13. The first tensioning adjusting member 122 passes through the limiting protrusion 1214 and then is connected to the second tensioning adjusting member 123. The elastic member 124 is sleeved outside the first tensioning adjusting member 122. Rotating the first tensioning adjusting member 122 can drive the second tensioning adjusting member 123 to move along the first direction X, and further cooperate with the limiting protrusion 1214 to make the elastic member 124 be compressed or in a natural elongation state.

[0070] In one embodiment, the synchronous belt 15 is sleeved around the periphery of the driving wheel 14. At least one section of the synchronous belt 15 connected to the driving wheel 14 is arranged along the first direction X. After the synchronous belt 15 surrounds the periphery of the driving wheel 14, it extends along the first direction X towards the side away from the tensioning assembly 12. The synchronous belt 15 configured to be in a tensioned state applies a pulling force to the driving wheel 14 along the first direction X. The driving wheel 14 is connected to the driving connection member 121, and this pulling force is further transmitted to the driving connection member 121, and further transmitted to the first tensioning adjustment member 122, causing one end of the first tensioning adjustment member 122 to abut against the base bracket 11. The other end of the first tensioning adjustment member 122 is provided with a second tensioning adjustment member 123 rotatably connected thereto. The outer side of the second tensioning adjustment member 123 is limited by the cooperation of the base bracket 11 and the driving connection member 121, so that the second tensioning adjustment member 123 cannot rotate relative to the base bracket 11 and the driving connection member 121. Therefore, when the first tensioning adjustment member 122 is turned, the second tensioning adjustment member 123 will be driven by the thread to move along the first direction X, and the second tensioning adjustment member 123 will then cooperate with the base bracket 11 to compress the elastic member 124. One end of the compressed elastic member 124 abuts against the second tensioning adjustment member 123 and the other end abuts against the driving connection member 121. Since the position of the second tensioning adjustment member 123 is actively adjusted and limited, the elastic force generated after the elastic member 124 is compressed abuts against and pushes the driving connection member 121, and the driving connection member 121 drives the driving wheel 14 to move in the direction opposite to the extending direction of the synchronous belt 15, thereby pulling the synchronous belt 15 to make the synchronous belt 15 tensioned.

[0071] It can be understood that the base kit 10 of the present application is used in cooperation with a driving wheel 14 and a synchronous belt 15 for transmission connection. The synchronous belt 15 is in transmission connection with the driving wheel 14. The driving wheel 14 is connected to the base bracket 11 through a tensioning assembly 12 and can be tensioned and adjusted to ensure the tension of the synchronous belt 15 and improve the printing quality. A limiting protrusion 1214 and a second tensioning adjustment member 123 are spaced apart in the driving cavity 13. An elastic member 124 is clamped between the limiting protrusion 1214 and the second tensioning adjustment member 123 along the first direction X. The driving cavity 13 houses the second tensioning adjustment member 123 and limits the periphery of the second tensioning adjustment member 123, enabling the second tensioning adjustment member 123 to move along the first direction X under the drive of the first tensioning adjustment member 122. The second tensioning adjustment member 123 cooperates with the limiting protrusion 1214 to compress the elastic member 124, so that the elastic member 124 can further push the transmission body 1210 to drive the driving wheel 14 to move along the first direction X to tension the synchronous belt 15. Through the mutual cooperation of the first tensioning adjustment member 122 and the second tensioning adjustment member 123, after compressing the elastic member 124, the elastic member 124 is used to push the transmission connecting member 121 to drive the driving wheel 14 to move. It is possible to actively adjust the tension of the synchronous belt 15 by controlling the first tensioning adjustment member 122, and the accuracy of the adjustment can also be improved through the dynamic tensioning adjustment between the elastic member 124 and the synchronous belt 15.

[0072] In one embodiment, the base bracket 11 further includes a side wall 113. The side wall 113 is connected to the bottom wall 111 and cooperates to form a receiving cavity 110. The tensioning assembly 12 is disposed in the receiving cavity 110. The side wall 113 is further connected to a limiting wall 112. The side wall 113 is provided with a first through hole 114, and the first through hole 114 communicates with the driving cavity 13. The first tensioning adjustment member 122 extends into the driving cavity 13 through the first through hole 114.

[0073] It can be understood that a plurality of side walls 113 are disposed around the same side of the bottom wall 111 to form a receiving cavity 110. The receiving cavity 110 can be used to accommodate various components in the base kit 10, improving the overall aesthetics of the base kit 10. At the same time, the bottom wall 111 and the side wall 113 can also serve as the connection and support for other components in the base kit 10.

[0074] In one embodiment, the limiting wall 112 is located within the accommodating cavity 110. The limiting wall 112 is connected to the bottom wall 111 and protrudes toward the side where the accommodating cavity 110 is located compared to the bottom wall 111. The limiting wall 112 can be formed by bending a plate with a certain thickness into a shape having three open faces. The two larger open faces face away from each other, and the other smaller open face is located between the two larger open faces, with the other areas blocked by the bent plate walls. One of the larger open faces is completely covered by the bottom wall 111, another larger open face is partially covered by the connecting body, and the smaller open face is covered by the side wall 113, so that the formed driving cavity 13 extends substantially along the first direction X.

[0075] In this embodiment, the limiting wall 112 is disposed substantially perpendicular to the bottom wall 111, and the connecting portion 1212 is disposed substantially perpendicular to the limiting wall 112. The projection shape of the limiting wall 112 on the bottom wall 111 substantially presents an "arch" shape. One end of the limiting wall 112 is connected to the side wall 113 and extends a certain distance in the first direction X away from the side wall 113 and then bends and turns, and then extends in the first direction X toward the side wall 113 until the other end of the limiting wall 112 is connected to the side wall 113. The second tension adjusting member 123 is in the shape of a rectangular hexahedron, and the four side faces 1232 of the second tension adjusting member 123 are respectively adapted to abut against the bottom wall 111, the connecting portion 1212, and the two inner surfaces of the limiting wall 112 facing away from each other, so that the second tension adjusting member 123 cannot rotate.

[0076] It can be understood that an adjusting convex block 116 located within the driving cavity 13 can also be formed on the bottom wall 111. The adjusting convex block 116 protrudes toward the side where the limiting wall 112 is located compared to the bottom wall 111, but the height is less than that of the limiting wall 112. The adjusting convex block 116, as a part of the bottom wall 111, can adjust the height between the bottom wall 111 and the second tension adjusting member 123, so that the abutting effect between the second tension adjusting member 123 and the bottom wall 111 is better.

[0077] In one embodiment, the transmission body 1210 includes a transmission portion 1211 and a connecting portion 1212. The connecting portion 1212 and the limiting protrusion 1214 are respectively disposed on opposite sides of the transmission portion 1211 and connected to the transmission portion 1211. The transmission portion 1211 cooperates with the bottom wall 111 and the limiting wall 112 to form the driving cavity 13. The connecting portion 1212 is used to connect the transmission wheel 14. The synchronous belt 15 is connected to the transmission wheel 14 and extends along the first direction X.

[0078] In this embodiment, the transmission part 1211 is generally plate-shaped, and the plate-shaped transmission part 1211 is slidably arranged on the side of the limiting wall 112 away from the bottom wall 111. The connecting part 1212 is connected to the transmission part 1211. The connecting part 1212 protrudes away from the limiting wall 112 compared with the transmission part 1211, and the connecting part 1212 has an opening that is open along the first direction X. The transmission wheel 14 is arranged in the connecting part 1212 and is rotatably connected to the connecting part 1212 by bolts. The synchronous belt 15 surrounds the transmission wheel 14 and is connected and extends out of the connecting part 1212, and further continues to extend along the first direction X.

[0079] In one embodiment, two round holes 1213 are formed in the transmission part 1211, and the two round holes 1213 are located on opposite sides of the transmission part 1211. Two waist-shaped holes 115 are formed in the bottom wall 111, and the two waist-shaped holes 115 are located on opposite sides of the limiting wall 112. Each waist-shaped hole 115 is arranged corresponding to one round hole 1213, and the length of the waist-shaped hole 115 along the first direction X is greater than the length of the round hole 1213 along the first direction X. The tensioning assembly 12 further includes a locking member 125, and one locking member 125 is arranged through one waist-shaped hole 115 and one round hole 1213.

[0080] In this embodiment, both the transmission wheel 14 and the synchronous belt 15 are located between the two round holes 1213, or both the transmission wheel 14 and the synchronous belt 15 are located between the two waist-shaped holes 115, so that the force between the transmission main body 1210 and the synchronous belt 15 is more uniform.

[0081] It can be understood that a part of the locking member 125 can be locked in matching with the round hole 1213, and at the same time, another part of the locking member 125 can be movably arranged in the inner cavity of the waist-shaped hole 115. When the locking member 125 is completely tightened, the transmission main body 1210 can be completely fixed and locked with the base bracket 11; when the locking member 125 is loosened, the transmission main body 1210 is driven under the tensioning cooperation of the synchronous belt 15 and the elastic member 124, and the transmission main body 1210 then drives the locking member 125 to move in the waist-shaped hole 115 until it reaches the balanced position.

[0082] In one embodiment, the first tensioning adjustment member 122 extends into the driving cavity 13, the limiting protrusion 1214 and the elastic member 124 are movably sleeved on the outer side of the first tensioning adjustment member 122, and the first tensioning adjustment member 122 sequentially passes through the limiting protrusion 1214, the elastic member 124 and the second tensioning adjustment member 123 along the first direction X.

[0083] In this embodiment, the first tension adjusting member 122 includes a connected rod portion 1221 and a nut portion 1222. The rod portion 1221 extends into the driving cavity 13 through the first through hole 114, and the nut portion 1222 is located on the side of the side wall 113 away from the driving cavity 13. The limiting protrusion 1214 is provided with a second through hole 1215 penetrating along the first direction X. The first tension adjusting member 122 passes through the limiting protrusion 1214 through the second through hole 1215 and is connected to the second tension adjusting member 123.

[0084] It can be understood that the rod portion 1221 sequentially passes through the first through hole 114 on the side wall 113 and the second through hole 1215 on the limiting protrusion 1214, and then is sleeved with the elastic member 124 and the second tension assembly 12; the width of the nut portion 1222 is greater than the inner diameter of the first through hole 114, so that the nut portion 1222 can be clamped outside the side wall 113 to prevent the first tension adjusting member 122 from being misaligned. By rotating the nut portion 1222, the rod portion 1221 can be driven to rotate relative to the second tension adjusting member 123.

[0085] In one embodiment, the second tension adjusting member 123 is threadedly connected to the first tension adjusting member 122. By rotating the first tension adjusting member 122, the second tension adjusting member 123 is driven to move in the driving cavity 13 along the first direction X.

[0086] In one embodiment, the second tension adjusting member 123 is plate-shaped, and the first direction X corresponds to the thickness direction of the plate-shaped second tension adjusting member 123. A threaded hole 1231 for the first tension adjusting member 122 to pass through is provided in the middle of the second tension adjusting member 123, and the periphery of the second tension adjusting member 123 is non-circular arc-shaped.

[0087] In this embodiment, the periphery of the second tension adjusting member 123 includes a plurality of sequentially connected side surfaces 1232. Any two adjacent side surfaces 1232 form an included angle. At least two spaced side surfaces 1232 respectively abut against the surface of the limiting wall 112 facing the driving cavity 13, at least one side surface 1232 abuts against the surface of the bottom wall 111 facing the driving cavity 13, and at least one side surface 1232 abuts against the surface of the transmission main body 1210 facing the driving cavity 13. An internal thread (not shown in the figure) is provided in the threaded hole 1231, and an external thread (not shown in the figure) is provided at the end of the rod portion 1221 away from the nut portion 1222, and the internal thread matches the external thread.

[0088] It can be understood that the first tension adjusting member 122 and the second tension adjusting member 123 are threadedly connected. The torque for rotating the first tension adjusting member 122 will be transmitted to the second tension adjusting member 123 through the mutually cooperating internal thread and external thread. At the same time, since the periphery of the second tension adjusting member 123 is locked by the cooperation of the limiting wall 112, the bottom wall 111, and the transmission connecting member 121, the second tension adjusting member 123 cannot rotate coaxially with the first tension adjusting member 122 (it can also be understood that the second tension adjusting member 123 cannot rotate with the first tension adjusting member 122 as the axis relative to the limiting wall 112, the bottom wall 111, and the transmission connecting member 121). Therefore, when the first tension adjusting member 122 is rotated, the second tension adjusting member 123 will rotate relative to the first tension adjusting member 122 based on the internal thread and the external thread, driving the second tension adjusting member 123 to move along the rod portion 1221 of the first tension adjusting member 122, thereby compressing or loosening the elastic member 124.

[0089] In one embodiment, the elastic member 124 can be a spring or an organic rubber rod and other parts that can be deformed by force. In this embodiment, the elastic member 124 is taken as an example of a spring for display.

[0090] In this embodiment, the elastic member 124 is clamped between the limiting protrusion 1214 and the second tension adjusting member 123. When one end of the elastic member 124 is compressed by driving the second tension adjusting member 123, the other end of the elastic member 124 will have a tendency to push the limiting protrusion 1214, causing the limiting protrusion 1214 to further drive the movement of the transmission main body 1210 and simultaneously tension the synchronous belt 15.

[0091] It can be understood that the main body of the tensioning assembly 12 is basically hidden in the accommodating cavity 110; specifically, the second tension adjusting member 123, the elastic member 124, and the rod portion 1221 of the first tension adjusting member 122 of the tensioning assembly 12 are all located inside the accommodating cavity 110, and only the nut portion 1222 of the first tension adjusting member 122 is provided outside the accommodating cavity 110. The tension adjustment can be achieved by rotating the nut portion 1222. While ensuring the adjustment function of the base kit 10 of the present application, it also reduces the exposure of parts and improves the overall aesthetic appearance of the base kit 10.

[0092] In one embodiment, the base kit 10 further includes a drive motor 16. The drive motor 16 is drivingly connected to the transmission wheel 14, and the drive motor 16 outputs a rotational torque to the transmission wheel 14 to drive the synchronous belt 15 to move. It can be understood that the drive motor 16 is connected to the bottom wall 111, and the drive motor 16 can be arranged to be movable within a small range along the first direction X relative to the bottom wall 111 to cooperate with the movement of the transmission wheel 14. For example, the drive motor 16 and the bottom wall 111 can be connected by pulleys and slide rails (not shown in the figure); alternatively, the drive motor 16 and the bottom wall 111 are detachably connected, and the frame (not shown in the figure) of the drive motor 16 fixed to the bottom wall 111 has a long hole structure for adjusting the connection mode of the drive motor 16 relative to the bottom wall 111; alternatively, the drive motor 16 is fixed to the bottom wall 111, but the transmission structure between the drive motor 16 and the transmission wheel 14 has a movable gap. Those skilled in the art can understand that the drive motor 16 can be designed to match the movement of the transmission wheel 14, and known and feasible structures can be selected, which will not be elaborated here.

[0093] Further in combination with Figure 9 As shown, the embodiment of the present application further provides a 3D printing device 1, which includes a nozzle kit 17, a drive kit 18, and the base kit 10 according to any one of the foregoing embodiments. The drive kit 18 is connected to the base kit 10 and the nozzle kit 17.

[0094] In the above text, the specific embodiments of the present application have been described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and substitutions can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and substitutions all fall within the scope defined by the present application.

Claims

1. A base kit, which is used in conjunction with a transmission wheel and a synchronous belt connected to a transmission, characterized in that: The base kit also includes: Base bracket; The tensioning assembly comprises a transmission connection, a first tensioning adjustment member, a second tensioning adjustment member and an elastic member, wherein the transmission connection comprises a connected transmission body and a limiting protrusion, wherein the transmission body cooperates with the base bracket to form a driving cavity, wherein the limiting protrusion and the second tensioning adjustment member are arranged in the driving cavity at intervals, wherein the elastic member is arranged between the limiting protrusion and the second tensioning adjustment member along a first direction, wherein the first tensioning adjustment member is rotatably connected with the second tensioning adjustment member to drive the second tensioning adjustment member to compress the elastic member along the first direction, so that the elastic member pushes the limiting protrusion to drive the transmission body to move along the first direction; Wherein, the transmission body is used to be fixedly connected with the transmission wheel.

2. The base kit according to claim 1, characterized in that: The second tensioning adjustment member is connected to the first tensioning adjustment member via threads, the first tensioning adjustment member is used to rotate to drive the second tensioning adjustment member, and the second tensioning adjustment member is used to move in the driving cavity along the first direction.

3. The base kit according to claim 2, characterized in that: The first tensioning adjustment member extends into the driving cavity, the limiting protrusion and the elastic member are movably sleeved on the outside of the first tensioning adjustment member, and the first tensioning adjustment member passes through the limiting protrusion, the elastic member and the second tensioning adjustment member in sequence along the first direction.

4. The base kit according to claim 2, characterized in that: The second tensioning adjustment member is plate-shaped, the first direction corresponds to the thickness direction of the second tensioning adjustment member, a threaded hole for the first tensioning adjustment member to pass through is provided in the middle of the second tensioning adjustment member, and the periphery of the second tensioning adjustment member is non-arc-shaped.

5. The base kit according to claim 4, characterized in that: The base bracket includes a bottom wall and a limiting wall which are connected to each other, and the periphery of the second tensioning adjustment member includes a plurality of side surfaces which are connected in sequence, and any two adjacent side surfaces are arranged at an angle, and at least two of the spaced side surfaces respectively abut against the surface of the limiting wall facing the driving cavity, at least one of the side surfaces abuts against the surface of the bottom wall facing the driving cavity, and at least one of the side surfaces abuts against the surface of the transmission body facing the driving cavity.

6. The base kit according to claim 1, characterized in that: The base bracket includes a bottom wall, a limiting wall and a side wall, the bottom wall is connected to the limiting wall, the side wall is connected to the bottom wall, the limiting wall is connected to the side wall, the side wall is provided with a first through hole, the first tensioning adjustment member includes a rod portion and a nut portion, the rod portion extends into the driving cavity through the first through hole, and the nut portion is located on the side of the side wall away from the driving cavity.

7. The base kit according to claim 1, characterized in that: The limiting protrusion is provided with a second through hole which is arranged to penetrate along the first direction, and the first tensioning adjustment member passes through the limiting protrusion through the second through hole to be connected with the second tensioning adjustment member.

8. The base kit according to claim 1, wherein: The base bracket includes a bottom wall and a limiting wall that are connected together, the transmission body includes a transmission part and a connecting part, the connecting part and the limiting protrusion are respectively arranged on two opposite sides of the transmission part and connected to the transmission part, the transmission part cooperates with the bottom wall and the limiting wall to form the driving cavity, the connecting part is used to connect the transmission wheel, and the synchronous belt is connected to the transmission wheel and extends along the first direction.

9. The base kit according to claim 8, characterized in that The transmission part is provided with two circular holes, and the two circular holes are located on opposite sides of the transmission part. The bottom wall is provided with two waist-shaped holes, and the two waist-shaped holes are located on opposite sides of the limiting wall. Each waist-shaped hole corresponds to a circular hole, and the length of the waist-shaped hole along the first direction is greater than the length of the circular hole along the first direction. The tensioning assembly also includes a locking piece, and a locking piece is set through one waist-shaped hole and one circular hole.

10. A 3D printing device, characterized in that: It comprises a nozzle kit, a drive kit and a base kit as described in any one of claims 1 to 9, wherein the drive kit is connected to the base kit and the nozzle kit.

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