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 sleeve piece is provided with a transmission wheel and a synchronous belt which are in transmission connection, and the base sleeve piece further comprises a base support and a tensioning assembly. The tensioning assembly comprises a transmission connecting piece, a base connecting piece, a driving connecting piece and an elastic piece, the transmission connecting piece is in sliding connection with the base support, the transmission connecting piece is movably connected with the base connecting piece through a one-way rack, the base connecting piece is detachably connected with the base support, and the driving connecting piece is detachably connected with the elastic piece. The driving connecting piece penetrates through the wall face of the base support and the base connecting piece to be fixedly connected with the transmission connecting piece, the driving connecting piece comprises a limiting end, and the elastic piece is arranged between the limiting end and the wall face of the base support. The transmission connecting piece is used for being fixedly connected with the 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) 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 starts to solidify and form, and finally a physical object is generated. 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 deposition and forming of the model on the forming platform, and thus determines the success or failure and accuracy of the entire model printing. The cooperation of a driving wheel and a synchronous belt to rotate the forming platform is a relatively common driving method in 3D printing, but 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 driving wheel and the synchronous belt 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 further includes a base bracket and a tensioning assembly. The tensioning assembly includes a transmission connecting member, a base connecting member, a driving connecting member, and an elastic member. The transmission connecting member is slidably connected to the base bracket. The transmission connecting member and the base connecting member are movably connected through a one-way rack. The base connecting member is detachably connected to the base bracket. The driving connecting member passes through the wall surface of the base bracket and the base connecting member to be fixedly connected to the transmission connecting member. The driving connecting member includes a limiting end, and the elastic member is arranged between the limiting end and the wall surface of the base bracket. Among them, the transmission connecting member is used for fixedly connecting with the driving wheel.

[0006] In one embodiment, the base bracket forms a receiving cavity, the tensioning assembly is arranged in the receiving cavity, and a guiding groove is provided on the surface of the base bracket where the receiving cavity is located. The transmission connecting member is slidably connected to the base bracket through the guiding groove.

[0007] In one embodiment, the transmission connecting member includes two side plates and a top plate. The two side plates are arranged at intervals, and a top plate is arranged between the two side plates and is respectively connected to the two side plates. The two side plates are configured to match the guiding grooves provided on the base bracket. The connecting end of the driving connecting member away from the limiting end is connected to the top plate, and the two side plates are configured to be connected to the transmission wheel.

[0008] In one embodiment, both of the two side plates are arranged on the same side of the top plate away from the elastic member. The surface of the side plate away from the top plate is provided with first teeth. The guiding groove extends along a first direction. The first teeth include a plurality of teeth that are spaced apart and inclined toward the side away from the elastic member along the first direction.

[0009] In one embodiment, the base connecting member includes a first connecting arm and two elastic arms. The two elastic arms are arranged at intervals, and a first connecting arm is arranged between the two elastic arms and is respectively connected to the two elastic arms. The two elastic arms are respectively located on opposite sides of the transmission connecting member. Each elastic arm is connected to a side plate of the transmission connecting member. The connecting end of the driving connecting member away from the limiting end passes through the first connecting arm.

[0010] In one embodiment, both of the two elastic arms are arranged on the same side of the first connecting arm away from the elastic member. The elastic arm includes a connected first bent section and a second bent section. The first bent section is connected to the first connecting arm. The second bent section is connected to the first bent section and bends toward the side where the first connecting arm is located. Each second bent section is connected to a side plate. The surfaces of the two second bent sections away from the first bent section are provided with second teeth, and the second teeth are configured to be adapted to the first teeth on the side plate.

[0011] In one embodiment, the base connecting member further includes a second connecting arm. The second connecting arm is connected to the first connecting arm. The second connecting arm includes two spaced connecting blocks. Both of the two connecting blocks protrude toward the side away from the first connecting arm compared with an elastic arm. A waist-shaped hole is formed in each connecting block. Two circular holes are provided on the base bracket. Each waist-shaped hole is correspondingly arranged with one of the circular holes. The inner diameter length of the waist-shaped hole is greater than the inner diameter of the circular hole.

[0012] In one embodiment, the base connecting member further includes a limiting arm. The limiting arm is located between the two elastic arms. The base bracket includes a bottom wall. The transmission connecting member is slidably connected to the bottom wall. The limiting arm is located on the side of the transmission connecting member away from the bottom wall. The transmission connecting member is clamped between the limiting arm and the guiding groove of the bottom wall.

[0013] In one embodiment, the base bracket includes a side wall, the driving connecting piece passes through the side wall, the limiting end is located on the side of the side wall away from the transmission connecting piece, the elastic member is arranged between the side wall and the limiting end, the synchronous belt is wound around and connected to the transmission wheel and extends in a first direction away from the elastic member, the transmission connecting piece can move unidirectionally in the first direction away from the synchronous belt compared with the base connecting piece, the driving connecting piece movably passes through the side wall and the base connecting piece, the elastic member is configured to be in a compressed state, and two ends of the elastic member in opposite directions along the first direction respectively abut against the side wall and the limiting end.

[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, and the driving kit is applied to connect 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 connecting piece is slidably connected to the base bracket. The driving connecting piece passes through the wall surface of the base bracket and the base connecting piece to be fixedly connected to the transmission connecting piece. The elastic member is arranged between the limiting end and the wall surface of the base bracket, so that the driving connecting piece can drive the transmission connecting piece to move under the drive of the elastic member, and the transmission connecting piece drives the transmission wheel to tighten the synchronous belt. The transmission connecting piece and the base connecting piece are movably connected through a one-way rack, and the transmission connecting piece and the base bracket are detachably connected, ensuring that the transmission connecting piece can drive the transmission wheel to tension the synchronous belt while maintaining the tension of the synchronous belt, avoiding the instability caused by the dynamic tension of the synchronous belt, and ensuring the printing quality. 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 is Figure 2 A partial enlarged schematic diagram corresponding to Region III.

[0019] Figure 4 is Figure 2 A partial cross-sectional schematic diagram along the IV-IV direction.

[0020] Figure 5Schematic perspective view of a tensioning assembly of a base kit provided by an embodiment of the present application at an angle.

[0021] Figure 6 Schematic perspective view of a tensioning assembly of a base kit provided by an embodiment of the present application at another angle.

[0022] Figure 7 Schematic perspective view of a 3D printing device provided by an embodiment of the present application.

[0023] Description of main component symbols

[0024] Base kit 10

[0025] Base bracket 11

[0026] Receiving cavity 110

[0027] Bottom wall 111

[0028] Side wall 112

[0029] First through hole 113

[0030] Guide groove 114

[0031] Guide plate 115

[0032] Round hole 116

[0033] Tensioning assembly 12

[0034] Drive connecting piece 121

[0035] Top plate 1211

[0036] Side plate 1212

[0037] Opening 1213

[0038] Base connecting piece 122

[0039] First connecting arm 1221

[0040] Second connecting arm 1222

[0041] Limit arm 1223

[0042] Elastic arm 1224

[0043] First bent section 1225

[0044] Second bent section 1226

[0045] Second through hole 1227

[0046] Connecting block 1228

[0047] Waist-shaped hole 1229

[0048] One-way rack 123

[0049] First tooth 1231

[0050] Second tooth 1232

[0051] Drive connecting piece 124

[0052] Limit end 1241

[0053] Connection end 1242

[0054] Elastic piece 125

[0055] Drive wheel 13

[0056] Timing belt 14

[0057] Drive motor 15

[0058] First direction X

[0059] 3D printing device 1

[0060] Spray head kit 16

[0061] Drive kit 17

[0062] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0063] The following description will more fully describe the content of the present application with reference to the accompanying 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 particular 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. In addition, when used herein, "comprising", "including" and / or "having", integers, steps, operations, components and / or components are included, but the presence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof is not excluded. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In addition, unless clearly defined in the text, 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.

[0064] Generally, 3D printing technology is a rapid prototyping technology that uses a digital model file as a basis and applies adhesive materials such as special wax materials, powdered metals or plastics 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 thermoplastic filament is heated and melted and then extruded from a nozzle, deposited on a forming platform or the previously cured material of the previous layer. When the temperature is lower than the curing temperature of the filament, it begins to cure and form, and finally a physical object is generated. 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. The cooperation of the drive wheel and the synchronous belt to rotate the forming platform is a relatively common driving method in 3D printing, but this method has an obvious defect. After the 3D printing device works for a long time, its synchronous belt may be stretched, making the connection between the drive wheel and the synchronous belt become loose and reducing the printing accuracy.

[0065] Correspondingly, an embodiment of the present application provides a base kit, which is used in cooperation with a driving wheel and a synchronous belt connected by transmission. The base kit further includes a base bracket and a tensioning assembly. The tensioning assembly includes a transmission connecting member, a base connecting member, a driving connecting member, and an elastic member. The transmission connecting member is slidably connected to the base bracket. The transmission connecting member and the base connecting member are movably connected through a one-way rack. The base connecting member is detachably connected to the base bracket. The driving connecting member passes through the wall surface of the base bracket and the base connecting member to be fixedly connected to the transmission connecting member. The driving connecting member includes a limiting end, and the elastic member is disposed between the limiting end and the wall surface of the base bracket. Wherein, the transmission connecting member is used for fixedly connecting with the driving wheel.

[0066] Furthermore, the base kit of the present application is used in cooperation with a driving wheel and a synchronous belt connected by transmission. The synchronous belt is connected to the driving wheel by transmission. The driving wheel is connected to the base bracket through the tensioning assembly and can be tensioned and adjusted to ensure the tension of the synchronous belt and improve the printing quality. The transmission connecting member is slidably connected to the base bracket. The driving connecting member passes through the wall surface of the base bracket and the base connecting member to be fixedly connected to the transmission connecting member. The elastic member is disposed between the limiting end and the wall surface of the base bracket, so that the driving connecting member can drive the transmission connecting member to move under the drive of the elastic member, and the transmission connecting member drives the driving wheel to tighten the synchronous belt. The transmission connecting member and the base connecting member are movably connected through a one-way rack. The transmission connecting member is detachably connected to the base bracket, which ensures that the transmission connecting member can drive the driving wheel to tension the synchronous belt and maintain the tension of the synchronous belt, avoiding the instability caused by the dynamic tension of the synchronous belt and ensuring the printing quality.

[0067] 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, using powdery metals, plastics, or other bondable materials.

[0068] The following content will describe exemplary embodiments with reference to 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 denoted by the same or similar reference numerals or similar technical terms.

[0069] The following will further describe in detail the specific embodiments of the present application with reference to the accompanying drawings.

[0070] As Figures 1 to 6As shown in the figure, an embodiment of the present application provides a base kit 10, which is used in cooperation with a driving wheel 13 and a synchronous belt 14 that are drivingly connected. The base kit 10 further includes a base bracket 11 and a tensioning assembly 12. The base bracket 11 is formed with a receiving cavity 110 having a receiving function. The tensioning assembly 12, the driving wheel 13, and the synchronous belt 14 are all disposed in the receiving cavity 110. The synchronous belt 14 is sleeved outside the driving wheel 13 to achieve synchronous transmission. The driving wheel 13 is movably connected to the base kit 10 through the tensioning assembly 12 for tensioning the synchronous belt 14.

[0071] In one embodiment, the tensioning assembly 12 includes a transmission connecting member 121, a base connecting member 122, a driving connecting member 124, and an elastic member 125. The transmission connecting member 121 is slidably connected to the base bracket 11. The transmission connecting member 121 and the base connecting member 122 are movably connected through a one-way rack 123. The base connecting member 122 is detachably connected to the base bracket 11. The driving connecting member 124 passes through the wall surface of the base bracket 11 and the base connecting member 122 to be fixedly connected to the transmission connecting member 121. The driving connecting member 124 includes a limiting end 1241. The elastic member 125 is disposed between the limiting end 1241 and the wall surface of the base bracket 11. Among them, the transmission connecting member 121 is used for fixedly connecting with the driving wheel 13.

[0072] It can be understood that the base kit 10 of the present application is used in cooperation with a driving wheel 13 and a synchronous belt 14 that are drivingly connected. The synchronous belt 14 is drivingly connected to the driving wheel 13. The driving wheel 13 is connected to the base bracket 11 through the tensioning assembly 12 and can be adjusted for tensioning to ensure the tension of the synchronous belt 14 and improve the printing quality. The transmission connecting member 121 is slidably connected to the base bracket 11. The driving connecting member 124 passes through the wall surface of the base bracket 11 and the base connecting member 122 to be fixedly connected to the transmission connecting member 121. The elastic member 125 is disposed between the limiting end 1241 and the wall surface of the base bracket 11, so that the driving connecting member 124 can drive the transmission connecting member 121 to move under the drive of the elastic member 125, and the transmission connecting member 121 drives the driving wheel 13 to tighten the synchronous belt 14. The transmission connecting member 121 and the base connecting member 122 are movably connected through a one-way rack 123. The transmission connecting member 121 is detachably connected to the base bracket 11, which ensures that the transmission connecting member 121 can drive the driving wheel 13 to tension the synchronous belt 14 while maintaining the tension of the synchronous belt 14, avoiding the instability caused by the dynamic tension of the synchronous belt 14 and ensuring the printing quality.

[0073] In one embodiment, the base bracket 11 includes a bottom wall 111 and a side wall 112. The transmission connecting member 121 is slidably connected to the bottom wall 111, the base connecting member 122 is detachably connected to the bottom wall 111, the driving connecting member 124 passes through the side wall 112 and the base connecting member 122 to be fixedly connected to the transmission connecting member 121, the limiting end 1241 is located on the side of the side wall 112 away from the bottom wall 111, and the elastic member 125 is disposed between the side wall 112 and the limiting end 1241.

[0074] In this embodiment, the tensioning assembly 12 is disposed on the base bracket 11, and the installation and fixation of the tensioning assembly 12 can be achieved by cooperating with the bottom wall 111 and the side wall 112 of the base bracket 11. In other embodiments, other transition connection structures may also be provided between the base bracket 11 and the tensioning assembly 12 for cooperating to realize the installation of the tensioning assembly 12 and the adjustment of the tensioning process.

[0075] In one embodiment, the side wall 112 surrounds the bottom wall 111 and cooperates to form an accommodation cavity 110, and the tensioning assembly 12 is disposed in the accommodation cavity 110. A guiding groove 114 is provided on the surface of the bottom wall 111 located in the accommodation cavity 110, and the transmission connecting member 121 is slidably connected to the bottom wall 111 through the guiding groove 114.

[0076] In this embodiment, the guiding groove 114 is formed by two strip-shaped guiding plates 115 protruding from the surface of the bottom wall 111. The two strip-shaped guiding plates 115 are spaced apart and both extend along the first direction X. The transmission connecting member 121 is clamped between the two strip-shaped guiding plates 115 and can move along the first direction X relative to the bottom wall 111. The guiding groove 114 is provided close to one side wall 112, and a through first through hole 113 is formed in the side wall 112 along the first direction X, and the driving connecting member 124 passes through the side wall 112 via the first through hole 113.

[0077] It can be understood that a plurality of side walls 112 surround and are disposed on the same side of the bottom wall 111 to form the accommodation cavity 110, and the accommodation 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 112 can also serve as the connection support for other components in the base kit 10.

[0078] In one embodiment, the synchronous belt 14 is wound around and connected to the transmission wheel 13 and extends along the first direction X toward the side away from the elastic member 125. The transmission connecting member 121 can move unidirectionally along the first direction X relative to the base connecting member 122 toward the side away from the synchronous belt 14. The driving connecting member 124 is movably passed through the side wall 112 and the base connecting member 122, the elastic member 125 is configured to be in a compressed state, and the two ends of the elastic member 125 along the opposite direction of the first direction X respectively abut against the side wall 112 and the limiting end 1241.

[0079] It can be understood that the "first direction X" is the extending direction of at least one section of the synchronous belt 14. The elastic member 125 in a compressed state applies a thrust away from the side wall 112 to the limiting end 1241. The transmission connecting member 121 can be driven by the driving connecting member 124 to move along the first direction X towards the side close to the elastic member 125, so as to tension the synchronous belt 14. At the same time, the transmission connecting member 121 and the base connecting member 122 are connected by a one-way rack 123, so that the transmission connecting member 121 is restricted and cannot move in the reverse direction of the first direction X relative to the base connecting member 122, ensuring the tension of the synchronous belt 14.

[0080] In an embodiment, the transmission connecting member 121 includes two side plates 1212 and a top plate 1211. The two side plates 1212 are arranged at intervals, and a top plate 1211 is arranged between the two side plates 1212 and is respectively connected to the two side plates 1212. The two side plates 1212 are configured to match the guiding grooves 114 provided on the bottom wall 111. The connecting end 1242 of the driving connecting member 124 away from the limiting end 1241 is connected to the top plate 1211, and the two side plates 1212 are configured to be connected to the transmission wheel 13.

[0081] In this embodiment, the two side plates 1212 are arranged parallel to each other at intervals, and openings 1213 are formed on both the two side plates 1212. The transmission wheel 13 can be arranged between the two side plates 1212 and is connected to the two side plates 1212 through a rotating shaft (not shown in the figure) passing through the opening 1213. The side plates 1212 can drive the transmission wheel 13 to perform synchronous movement, and at the same time, the transmission wheel 13 can rotate relative to the transmission connecting member 121, realizing the relative movement between the transmission wheel 13 and the synchronous belt 14.

[0082] It can be understood that when the transmission connecting member 121 is arranged to match the guiding grooves 114, the two side plates 1212 extend along the first direction X and are located between the two guiding plates 115. The two side plates 1212 are both arranged on the same side of the top plate 1211 away from the elastic member 125. The top plate 1211 is arranged between the two side plates 1212 and connects the two side plates 1212, so that the driving connecting member 124 can drive the two side plates 1212 to move along the first direction X under the guidance of the guiding grooves 114.

[0083] In one embodiment, the base connecting member 122 includes a first connecting arm 1221 and two elastic arms 1224. The two elastic arms 1224 are spaced apart. A first connecting arm 1221 is disposed between the two elastic arms 1224 and is respectively connected to the two elastic arms 1224. The connecting end 1242 of the driving connecting member 124 away from the limiting end 1241 passes through the first connecting arm 1221. The two elastic arms 1224 are both disposed on the same side of the first connecting arm 1221 away from the elastic member 125. The two elastic arms 1224 are respectively located on opposite sides of the transmission connecting member 121. Each elastic arm 1224 is connected to a side plate 1212 of a transmission connecting member 121.

[0084] In this embodiment, a second through hole 1227 is formed in the first connecting arm 1221, and the driving connecting member 124 passes through the base connecting member 122 via the second through hole 1227.

[0085] It can be understood that the two elastic arms 1224 are respectively connected to the two side plates 1212 through one-way racks 123 to realize the connection between the transmission connecting member 121 and the base connecting member 122. The first connecting arm 1221 is generally plate-shaped. A first connecting arm 1221 connects the two elastic arms 1224 to keep the two elastic arms 1224 stable.

[0086] In one embodiment, the elastic arm 1224 includes a connected first bent section 1225 and a second bent section 1226. The first bent section 1225 is connected to the first connecting arm 1221. The second bent section 1226 is connected to the first bent section 1225 and bends toward the side where the first connecting arm 1221 is located. Each second bent section 1226 is connected to a side plate 1212.

[0087] It can be understood that the bent part of the second bent section 1226 is spaced apart from the first bent section 1225, and the gap therebetween can be used for deformation avoidance of the second bent section 1226, so that the transmission connecting member 121 and the base connecting member 122 can perform one-way movement through the one-way rack 123.

[0088] In one embodiment, the one-way rack 123 includes a first tooth 1231 and a second tooth 1232. The first tooth 1231 and the second tooth 1232 mesh with each other. The first tooth 1231 and the second tooth 1232 can move relative to each other in one direction and cannot move in the opposite direction. The first tooth 1231 is provided on the surface of the side plate 1212 away from the top plate 1211. The second teeth 1232 are provided on the surfaces of the two second bent sections 1226 away from the first bent section 1225. The second teeth 1232 are configured to be adapted to the first teeth 1231 on the side plate 1212.

[0089] In this embodiment, the guiding groove 114 extends along the first direction X. The first teeth 1231 include a plurality of spaced wedge-shaped teeth that are inclined away from the elastic member 125 along the first direction X. The second teeth 1232 include a plurality of spaced wedge-shaped teeth that are inclined toward the elastic member 125 along the first direction X. The teeth of the first teeth 1231 engage with the teeth of the second teeth 1232.

[0090] It can be understood that when the transmission connecting member 121 has a tendency to move along the first direction X toward the side where the elastic member 125 is located, the teeth of the first teeth 1231 and the teeth of the second teeth 1232 move relative to each other through the guidance of their contact inclined surfaces, causing the second bent section 1226 to bend toward the first bent section 1225 under the extrusion of the side plate 1212. The teeth of the first teeth 1231 and the teeth of the second teeth 1232 gradually disengage to release the locking of the side plate 1212. The side plate 1212 moves a distance corresponding to one tooth along the first direction X. Subsequently, the second bent section 1226 returns toward the side away from the first bent section 1225, causing the teeth of the first teeth 1231 and the teeth of the second teeth 1232 to engage again. When the transmission connecting member 121 has a tendency to move along the first direction X away from the side where the elastic member 125 is located, the teeth of the first teeth 1231 and the teeth of the second teeth 1232 abut against each other, preventing the side plate 1212 from separating from the elastic arm 1224, thereby preventing the transmission connecting member 121 from moving along the first direction X away from the side where the elastic member 125 is located relative to the base connecting member 122, and the synchronous belt 14 will not be loosened accordingly.

[0091] In one embodiment, the base connecting member 122 further includes a second connecting arm 1222, and the second connecting arm 1222 is connected to the first connecting arm 1221. The second connecting arm 1222 includes two spaced connecting blocks 1228, and both of the two connecting blocks 1228 protrude away from the first connecting arm 1221 compared to one elastic arm 1224. A waist-shaped hole 1229 is formed in each connecting block 1228. Two circular holes 116 are provided on the base bracket 11, and each waist-shaped hole 1229 is arranged corresponding to one circular hole 116. The inner diameter length of the waist-shaped hole 1229 is greater than the inner diameter of the circular hole 116.

[0092] It can be understood that the base connecting member 122 is connected to the bottom wall 111 of the base bracket 11 through the second connecting arm 1222. The second connecting arm 1222 and the bottom wall 111 are detachably connected by a bolt (not shown in the figure) that can pass through the waist-shaped hole 1229 and the round hole 116 at the same time. The waist-shaped hole 1229 is longer in the first direction X, enabling the base connecting member 122 to adjust its position relative to the bottom wall 111 in the first direction X. When it is necessary to adjust the position of the tensioning assembly 12 in the first direction X, the bolt (not shown in the figure) locking the second connecting arm 1222 and the bottom wall 111 can be loosened, and the base connecting member 122 can be moved along the first direction X to a suitable position and then the bolt (not shown in the figure) can be locked again.

[0093] In an embodiment, the base connecting member 122 further includes a limiting arm 1223, and the limiting arm 1223 is located between the two elastic arms 1224. The limiting arm 1223 is located on the side of the transmission connecting member 121 away from the bottom wall 111, and the transmission connecting member 121 is clamped between the limiting arm 1223 and the guiding groove 114 of the bottom wall 111.

[0094] It can be understood that the limiting arm 1223 and the second connecting arm 1222 are respectively located on the opposite sides of the first connecting arm 1221. The limiting arm 1223 can cooperate with the bottom wall 111 to limit the transmission connecting member 121, preventing the transmission connecting member 121 from disengaging from the guiding groove 114 and causing the tensioning assembly 12 to be misaligned. In this embodiment, the limiting arm 1223 is plate-shaped and corresponds to the first connecting arm 1221.

[0095] In this embodiment, the driving connecting member 124 is in the shape of a bolt. The nut of the bolt-shaped driving connecting member 124 corresponds to the limiting end 1241 of the driving connecting member 124, and the other end (connecting end 1242) of the bolt-shaped driving connecting member 124 can be connected to the top plate 1211 by threads. It can be understood that the driving connecting member 124 can also be a variant form of a standard bolt, for example, having a larger limiting end (not shown in the figure), or having a cavity (not shown in the figure) that can hide the elastic member 125.

[0096] In an embodiment, the elastic member 125 can be a spring or an organic rubber rod and other parts that can be deformed by force. In this embodiment, the elastic member 125 is taken as an example of a spring for display.

[0097] It can be understood that in the initial assembly state, the synchronous belt 14 is adjusted to a tensioned state. Both ends of the elastic member 125 abut against the side wall 112 and the limiting end 1241 respectively. However, the already tensioned synchronous belt 14 cannot be stretched and tensioned any further, so that the elastic member 125 cannot push the driving connecting member 124, and the transmission connecting member 121 and the base connecting member 122 do not undergo relative displacement. After working for a period of time, the synchronous belt 14 will be stretched so that it is no longer in a sufficiently tensioned state. At this time, the elastic member 125 can push the limiting end 1241, and the driving connecting member 124 has a movement tendency in the first direction X away from the synchronous belt 14. When the synchronous belt 14 is stretched by a certain length, the unidirectional rack 123 will displace by at least the length corresponding to one tooth in the first direction X until the synchronous belt 14 is tensioned again to the extent that the elastic member 125 cannot push the driving connecting member 124, thereby completing the tensioning of the synchronous belt 14.

[0098] In one embodiment, the base kit 10 further includes a driving motor 15. The driving motor 15 is drivingly connected to the transmission wheel 13, and the driving motor 15 outputs a rotational torque to the transmission wheel 13 to drive the synchronous belt 14 to move.

[0099] It can be understood that the driving motor 15 is connected to the base bracket 11. The driving motor 15 can be arranged to be able to move within a small range relative to the base bracket 11 in the first direction X to cooperate with the movement of the transmission wheel 13. For example, the driving motor 15 and the base bracket 11 can be connected by a pulley and slide rail (not shown in the figure); or, the driving motor 15 and the base bracket 11 are detachably connected, and the driving motor 15 is fixed to the frame of the base bracket 11 (not shown in the figure) with a waist-shaped hole structure for adjusting the connection mode of the driving motor 15 relative to the base bracket 11; or, the driving motor 15 is fixed to the base bracket 11, but the transmission structure between the driving motor 15 and the transmission wheel 13 has an active gap. Those skilled in the art can understand that the driving motor 15 can be designed to match the movement of the transmission wheel 13, and it can select known and feasible structures, which will not be elaborated here.

[0100] Further in combination with Figure 7 As shown, the embodiment of the present application further provides a 3D printing device 1, which includes a nozzle kit 16, a driving kit 17, and the base kit 10 according to any one of the foregoing embodiments. The driving kit 17 is applied to connect the base kit 10 and the nozzle kit 16.

[0101] 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; A tensioning assembly, comprising a transmission connection member, a base connection member, a driving connection member and an elastic member, wherein the transmission connection member is slidably connected to the base bracket, the transmission connection member and the base connection member are movably connected through a one-way rack, the base connection member and the base bracket are detachably connected, the driving connection member passes through the wall surface of the base bracket and the base connection member to be fixedly connected to the transmission connection member, the driving connection member comprises a limiting end, and the elastic member is arranged between the limiting end and the wall surface of the base bracket; Wherein, the transmission connecting member is used to be fixedly connected to the transmission wheel.

2. The base kit according to claim 1, characterized in that: The base bracket is formed with a receiving cavity, the tensioning assembly is arranged in the receiving cavity, the surface of the base bracket located in the receiving cavity is provided with a guide groove, and the transmission connecting member is slidably connected with the base bracket through the guide groove.

3. The base kit according to claim 1, characterized in that: The transmission connecting member includes two side plates and a top plate, the two side plates are arranged at intervals, a top plate is arranged between the two side plates and is respectively connected to the two side plates, the two side plates are constructed to match the guide grooves set on the base bracket, the connection end of the driving connecting member away from the limit end is connected to the top plate, and the two side plates are constructed to be connected to the transmission wheel.

4. The base kit according to claim 3, characterized in that: The two side plates are both arranged on the same side of the top plate away from the elastic member, and the surface of the side plate away from the top plate is provided with a first tooth, the guide groove extends along a first direction, and the first tooth includes a plurality of teeth that are spaced apart and inclined along the first direction toward a side away from the elastic member.

5. The base kit according to claim 1, characterized in that: The base connecting member includes a first connecting arm and two elastic arms, the two elastic arms are arranged at intervals, one first connecting arm is arranged between the two elastic arms and is connected to the two elastic arms respectively, the two elastic arms are respectively located on two opposite sides of the transmission connecting member, each of the elastic arms is connected to a side plate of the transmission connecting member, and the first connecting arm is passed through the connecting end of the driving connecting member away from the limiting end.

6. The base kit according to claim 5, characterized in that: The two elastic arms are both arranged on the same side of the first connecting arm away from the elastic member, and the elastic arm includes a first bending section and a second bending section that are connected, the first bending section is connected to the first connecting arm, the second bending section is connected to the first bending section and is bent toward the side where the first connecting arm is located, each of the second bending sections is connected to one of the side plates, and second teeth are provided on the surfaces of the two second bending sections away from the first bending section, and the second teeth are constructed to adapt to the first teeth on the side plate.

7. The base kit according to claim 5, characterized in that: The base connecting piece also includes a second connecting arm, which is connected to the first connecting arm. The second connecting arm includes two spaced connecting blocks, and both of the two connecting blocks protrude toward a side away from the first connecting arm compared to one of the elastic arms. Each of the connecting blocks is provided with a waist-shaped hole, and the base bracket is provided with two circular holes, each of the waist-shaped holes is arranged corresponding to one of the circular holes, and the inner diameter length of the waist-shaped hole is greater than the inner diameter diameter of the circular hole.

8. The base kit according to claim 5, characterized in that: The base connecting member also includes a limiting arm, which is located between the two elastic arms. The base bracket includes a bottom wall. The transmission connecting member is slidably connected to the bottom wall. The limiting arm is located on the side of the transmission connecting member away from the bottom wall. The transmission connecting member is clamped between the limiting arm and the guide groove of the bottom wall.

9. The base kit according to claim 1, characterized in that: The base bracket includes a side wall, the drive connecting member passes through the side wall, the limit end is located on the side of the side wall away from the transmission connecting member, the elastic member is arranged between the side wall and the limit end, the synchronous belt is connected around the transmission wheel and extends along the first direction toward the side away from the elastic member, the transmission connecting member can move unidirectionally along the first direction toward the side away from the synchronous belt compared to the base connecting member, the drive connecting member can movably pass through the side wall and the base connecting member, the elastic member is constructed to be in a compressed state, and the two ends of the elastic member opposite to each other along the first direction respectively abut against the side wall and the limit end.

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 applied to connect the base kit and the nozzle kit.

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