Tensioning device, transmission module and three-dimensional printing equipment

Abstract

According to the tensioning device, the transmission module and the three-dimensional printing equipment, the tensioning piece is arranged to apply force to the first connecting piece, it is guaranteed that the tensioning degree of a conveying belt is moderate, and consistent adjustment of the tensioning degree of the conveying belt is facilitated. According to the main technical scheme, the tensioning device is characterized in that a first connecting piece is connected with one end of a conveying belt; the tensioning piece is connected with the first connecting piece and the second connecting piece and applies force to the first connecting piece, so that the first connecting piece moves to tension the conveying belt; and the position of the first positioning piece at least comprises a locking position, and when the first positioning piece is located at the locking position, the first positioning piece fixes the relative position of the first connecting piece and the second connecting piece. The tensioning device is mainly used for adjusting the tensioning degree of the conveying belt.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing, and in particular to a tensioning device, a transmission module and a three-dimensional printing device. Background Art

[0002] In a 3D printer, the print head moves in the X-axis direction with the cooperation of the conveyor belt and the X-axis drive unit, and the printing platform moves in the Y-axis direction with the cooperation of the conveyor belt and the Y-axis drive unit. The gantry unit drives the X-axis drive unit to move in the vertical direction, thereby realizing the free movement of the print head relative to the printing platform in the three-dimensional space to achieve three-dimensional molding.

[0003] When using the printer for the first time or after using it for a period of time, you need to use a tensioning device to adjust the tension of the conveyor belt to ensure that the tension of the conveyor belt is moderate. The existing tensioning device usually includes a movable roller, a housing and an adjusting bolt. The adjusting bolt is connected to the movable roller and screwed to the housing. The movable roller is connected to the synchronous belt. By turning the adjusting bolt, the movable roller can be driven to move to squeeze the conveyor belt to different degrees to adjust the conveyor belt. The tensioning device needs to be operated manually and cannot accurately control the tension of the conveyor belt, which can easily cause the conveyor belt to be too tight and accelerate mechanical wear, or the conveyor belt is loose and cannot be effectively transmitted. Utility Model Content

[0004] In view of this, in order to solve at least one of the above technical problems, the utility model provides a tensioning device, a transmission module and a three-dimensional printing device.

[0005] In order to achieve the above purpose, the utility model mainly provides the following technical solutions:

[0006] On the one hand, the utility model provides a tensioning device, comprising:

[0007] A first connecting member, the first connecting member is used to connect the first end of the conveyor belt;

[0008] A second connecting member and a tensioning member, wherein the tensioning member is connected to the first connecting member and the second connecting member, and the tensioning member is used to apply force to the first connecting member so that the first connecting member moves relative to the second connecting member to tighten the conveyor belt;

[0009] The positioning member, the position of the positioning member at least includes a locking position, when the positioning member is in the locking position, the positioning member is connected to the first connecting member and the second connecting member to fix the relative position of the first connecting member and the second connecting member.

[0010] On the other hand, the utility model provides a transmission module, comprising any of the aforementioned tensioning devices.

[0011] On the other hand, the utility model provides a three-dimensional printing device, comprising any one of the transmission modules described above.

[0012] The utility model proposes a tensioning device, a transmission module and a three-dimensional printing device, which ensure that the tension of the conveyor belt is moderate by setting a tensioning member to apply force to the first connecting member, and help to adjust the tension of the transmission belt consistently. In the prior art, the conveyor belt is adjusted by manually rotating the adjusting bolt, and the manual operation cannot accurately control the tension of the conveyor belt, resulting in the conveyor belt being too tight and accelerating mechanical wear, or the conveyor belt being loose and unable to effectively transmit. Compared with the prior art, in the present application document, when it is necessary to adjust the tension of the conveyor belt, the adjusting positioning member loosens the first connecting member, and the first connecting member will move under the joint action of the tensioning member and the conveyor belt until a force balance is reached, thereby realizing automatic tensioning of the conveyor belt; because the tensioning member applies force to the first connecting member, the tension of the conveyor belt is ensured, so that the conveyor belt is adjusted consistently, avoiding the looseness of the conveyor belt leading to the inability to transmit, and avoiding the tightness of the conveyor belt accelerating the mechanical wear of the parts connected to the conveyor belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural schematic diagram of a tensioning device provided by an embodiment of the utility model at a first viewing angle;

[0014] Figure 2 A structural schematic diagram of a tensioning device provided by an embodiment of the utility model at a second viewing angle;

[0015] Figure 3 A schematic structural diagram of a tensioning device provided by an embodiment of the utility model at a third viewing angle;

[0016] Figure 4 A schematic structural diagram of a tensioning device provided by an embodiment of the utility model at a fourth viewing angle;

[0017] Figure 5 A schematic structural diagram of a tensioning device provided by an embodiment of the utility model at a fifth viewing angle;

[0018] Figure 6 A schematic structural diagram of a tensioning device provided by an embodiment of the utility model at a sixth viewing angle;

[0019] Figure 7 A schematic diagram of the structure of a transmission module provided by an embodiment of the utility model in a first installation state;

[0020] Figure 8 A schematic diagram of the structure of a transmission module provided by an embodiment of the utility model in a second installation state;

[0021] Fig. 9A schematic structural diagram of a transmission module provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the present invention, the following is a detailed description of the specific optional implementation methods, structures, features and effects of the tensioning device proposed by the present invention in combination with the accompanying drawings and preferred embodiments.

[0023] On the one hand, if Figure 1-Figure 6 As shown, the embodiment of the utility model provides a tensioning device, comprising:

[0024] A first connecting member 100, the first connecting member 100 is used to connect a first end of the conveyor belt 10;

[0025] The second connecting member 200 and the tensioning member 300 are connected to the first connecting member 100 and the second connecting member 200. The tensioning member 300 is used to apply force to the first connecting member 100 so that the first connecting member 100 moves relative to the second connecting member 200 to tighten the conveyor belt 10;

[0026] The positioning member 400 , the position of the positioning member 400 at least includes a locking position. When the positioning member 400 is in the locking position, the positioning member 400 is connected to the first connecting member 100 and the second connecting member 200 to fix the relative positions of the first connecting member 100 and the second connecting member 200 .

[0027] The tensioning device can be used on a variety of transmission modules that rely on the conveyor belt 10 for power transmission, and is used to adjust the tension of the conveyor belt 10. The transmission module can be a transmission module on a three-dimensional printing device. The conveyor belt 10 connects the power component of the transmission module and the driven component 20, and is used to drive the driven component 20 to move under the drive of the power component. The driven component 20 can be a print head, a printing platform, and other possible moving parts on the three-dimensional printing device. For example, the transmission module can be an X-axis module, and the driven component 20 is a print head. Or the transmission module is a Y-axis module, and the driven component 20 is a printing platform. It can also be that the transmission module is a scraper module, and the driven component 20 is a scraper, etc., which are not listed one by one.

[0028] The conveyor belt 10 includes a first end and a second end. The first end of the conveyor belt 10 is connected to the first connecting member 100. The second end of the conveyor belt 10 can be connected to the second connecting member 200. The second connecting member 200 facilitates the connection of the conveyor belt 10. Alternatively, the second end of the conveyor belt 10 can also be connected to the driven member 20 or the print head. Alternatively, the second connecting member 200 includes a conveyor belt fixing member. The second end of the conveyor belt 10 can be connected to the conveyor belt fixing member, and then the conveyor belt fixing member is connected to the second connecting member 200 or the driven member 20. The second connecting member 200 can be an independent structural member fixedly connected to the driven member 20. Alternatively, the second connecting member 200 may also be a partial structure of the driven member 20 itself, that is, the second connecting member 200 and the driven member 20 are integrally formed. For example, if the driven member 20 is a print head, the second connecting member 200 may be a cover plate of the print head, or a partial area of ​​a shell of the print head, and the second end of the conveyor belt 10 is connected to the second connecting member 200 (that is, in the above corresponding embodiments, the second end of the conveyor belt 10 may be connected to a partial area of ​​the cover plate or shell of the print head). Alternatively, the second connecting member 200 includes a conveyor belt fixing member and at least a partial structure of the print head, the conveyor belt 10 fixing member is arranged on at least a partial structure of the print head, and at least a partial structure of the print head may be a partial area of ​​a cover plate or shell of the print head, the tensioning member 300 is respectively connected to the first connecting member 100 and at least a partial structure of the print head, and the second end of the conveyor belt 10 is connected to the conveyor belt fixing member. The tensioning member 300 is respectively connected to the first connecting member 100 and the second connecting member 200. The positioning member 400 is used to connect the driven member 20 to fix the relative position of the first connecting member 100 and the driven member 20, or the positioning member 400 is used to connect the second connecting member 200 to fix the relative position of the first connecting member 100 and the second connecting member 200. During the printing process, the positioning member 400 fixes the first connecting member 100 on the driven member 20 or the second connecting member 200, and the first connecting member 100 moves synchronously with the driven member 20, playing the role of fixed connection between the conveyor belt 10 and the driven member 20. The tensioning member 300 will not move the first connecting member 100, and the first connecting member 100 will not actively change the tension of the conveyor belt 10. When the tension of the conveyor belt 10 needs to be adjusted, the positioning member 400 loosens the first connecting member 100, and the first connecting member 100 moves due to the action of the tension member 300 and pulls the conveyor belt 10, thereby adjusting the tension of the conveyor belt 10, until the forces exerted by the conveyor belt 10 and the tension member 300 on the first connecting member 100 reach a balance, and when the first connecting member 100 stops moving, the conveyor belt 10 is tightened, and the positioning member 400 fixes the position of the first connecting member 100 again. Then, the tension of the conveyor belt 10 is locked at a certain value or within a certain range.

[0029] The force applied by the tensioning member 300 to the first connecting member 100 may be a fixed value or within a certain range. For example, the tensioning member 300 may include a dynamometer and a power mechanism, the power mechanism is connected to the first connecting member 100 via the dynamometer, the tension of the power mechanism is fed back via the dynamometer, and then a preset external force of a fixed size is applied to the first connecting member 100. Alternatively, the tensioning member 300 may be an elastic member, and the tensioning member 300 applies an elastic force to the first connecting member 100. Since the position of the first connecting member 100 will change when adjusting the conveyor belt 10, the elastic force applied by the tensioning member 300 to the first connecting member 100 will change, but the change in the position of the first connecting member 100 and the change in the elastic force of the tensioning member 300 are both changes within a very small range. The elastic force applied by the tensioning member 300 to the first connecting member 100 is a force that changes within a small range, and can be approximately regarded as a fixed value, and the consistency of the tension adjustment of the conveyor belt 10 can still be ensured.

[0030] The utility model provides a tensioning device, a transmission module and a three-dimensional printing device. By setting a tensioning member to apply force to the first connecting member, the tensioning degree of the conveyor belt is ensured to be moderate, which helps to adjust the tensioning degree of the transmission belt consistently. In the prior art, the conveyor belt is adjusted by manually rotating the adjusting bolt. The manual operation cannot accurately control the tensioning degree of the conveyor belt, which causes the conveyor belt to be too tight and accelerate mechanical wear, or the conveyor belt is loose and cannot be effectively transmitted. Compared with the prior art, in the present application document, when it is necessary to adjust the tension of the conveyor belt, the adjusting positioning member loosens the first connecting member, and the first connecting member will move under the joint action of the tensioning member and the conveyor belt until the force balance is reached. Since the tensioning member applies force to the first connecting member, the tensioning degree of the conveyor belt is ensured, so that the conveyor belt is adjusted consistently, avoiding the looseness of the conveyor belt leading to the inability to achieve transmission, and avoiding the tightness of the conveyor belt accelerating the mechanical wear of the parts connected to the conveyor belt.

[0031] When the second connecting member 200 is fixedly connected to the driven member 20 , the tensioning device includes a fixing member 500 , which is connected to the second connecting member 200 , and the fixing member 500 is connected to the driven member 20 to fix the second connecting member 200 .

[0032] The fixing member 500 may be a bolt, a through hole is provided on the driven member 20 or the print head, and a screw hole is provided on the second connecting member 200. The fixing member 500 passes through the through hole and is screwed on the second connecting member 200 to fix the second connecting member 200.

[0033] In an optional implementation, the first connecting member 100 and the second connecting member 200 are slidably connected.

[0034] There is a guiding function between the first connecting member 100 and the second connecting member 200, which can increase the stability of the first connecting member 100 and / or the second connecting member 200 during movement, avoid vibration during movement, and avoid affecting the connection accuracy between the conveyor belt 10 and the power parts in the X-axis module.

[0035] The first connecting member 100 and the second connecting member 200 can be slidably connected in various ways, such as a slide groove is provided on one of the first connecting member 100 and the second connecting member 200, and the slide groove extends in the moving direction of the first connecting member 100, and a slider is provided on the other of the first connecting member 100 and the second connecting member 200, and the slider slides and fits into the slide groove. Alternatively, a first slide hole 201 is provided on one of the first connecting member 100 and the second connecting member 200, and the first slide hole 201 extends in the moving direction of the first connecting member 100, and a screw hole is provided on the other of the first connecting member 100 and the second connecting member 200, and after the positioning member 400 slides through the first slide hole 201, it is screwed to the screw hole of the other of the first connecting member 100 and the second connecting member 200. Figure 5-6 As shown, the second connecting member 200 may be provided with a first sliding hole 201, the first sliding hole 201 is a bar-shaped hole, the positioning member 400 may be a bolt, and after the bolt passes through the first sliding hole 201, it is screwed with the first connecting member 100, and the bolt and the first sliding hole 201 may be in sliding contact, thereby achieving a guiding effect between the first connecting member 100 and the second connecting member 200. In addition, when the first connecting member 100 is in the locked position, the first connecting member 100 contacts the outer side of the first sliding hole 201 to fix the relative position of the first connecting member 100 and the second connecting member 200.

[0036] In an optional embodiment, the tensioning member 300 includes an elastic member, which may be a tension spring, a compression spring, or a torsion spring. If the tensioning member 300 is a tension spring, the tensioning member 300 is disposed between the first connecting member 100 and the second connecting member 200. The connection method between the tensioning member 300 and the first connecting member 100 and / or the second connecting member 200 includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding, and welding. If the tensioning member 300 is a tension spring, both ends of the tensioning member 300 are hung with the first connecting member 100 and the second connecting member 200.

[0037] In a more specific embodiment, a first mounting groove 101 is formed on the first connecting member 100, a first end of the tensioning member 300 includes a first through hole 301, and the first end of the tensioning member 300 extends into the first mounting groove 101, and the tensioning device further includes a first plug-in 600, and the first plug-in 600 is connected to the first connecting member 100 and the first through hole 301. A second mounting groove 202 is formed on the second connecting member 200, a second end of the tensioning member 300 includes a second through hole 302, and the second end of the tensioning member 300 extends into the second mounting groove 202, and the tensioning device further includes a second plug-in 700, and the second plug-in 700 is connected to the second connecting member 200 and the second through hole 302.

[0038] When the tensioning member 300 is a tension spring, the ends of the tensioning member 300 can be bent into a ring shape to form a first through hole 301 and a second through hole 302. The openings of the first installation groove 101 and the second installation groove 202 are arranged opposite to each other and are extended in the extension direction of the conveyor belt 10 to ensure that the tensioning member 300 applies force in the extension direction of the conveyor belt 10. The first plug-in 600 and the second plug-in 700 can be pins, which are interference-fitted with the first connecting member 100 and the second connecting member 200, or the first plug-in 600 and the second plug-in 700 can be bolts, which are screwed with the first connecting member 100 and the second connecting member 200. The tensioning member 300 is hung with the first plug-in 600 and the second plug-in 700, so that the tensioning member 300 is easy to connect and disassemble with the first connecting member 100 and the second connecting member 200, and the tensioning member 300 can be replaced when it is deformed after long-term use.

[0039] In an optional embodiment, the connection method between the first connecting member 100 and / or the second connecting member 200 and the conveyor belt 10 includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding. It is intended to facilitate the installation and removal of the first connecting member 100 and / or the second connecting member 200 and the conveyor belt 10, and can be arranged according to the structure of the conveyor belt 10. If there are engaging teeth on one side of the conveyor belt 10, a first connecting groove 102 can be provided on the first connecting member 100, and at least one side wall of the first connecting groove 102 corresponding to the engaging teeth on the conveyor belt 10 is a toothed side wall, and the first end of the conveyor belt 10 extends into the first connecting groove 102, and then engages with the toothed side wall for positioning. And / or, a second connecting groove 203 is provided on the second connecting member 200, and at least one side wall of the second connecting groove 203 corresponding to the engaging teeth on the conveyor belt 10 is a toothed side wall, and the second end of the conveyor belt 10 extends into the second connecting groove 203 and then engages with the toothed side wall for positioning.

[0040] In order to prevent the conveyor belt 10 from being loosened from the first connecting member 100 and / or the second connecting member 200, resulting in inaccurate tension of the conveyor belt 10, in an optional embodiment, as Figure 6As shown, when the positioning member 400 is in the locking position, the end of the positioning member 400 is located in the first connecting groove 102 to squeeze and fix the conveyor belt 10. If the positioning member 400 is a bolt, the screw hole of the first connecting member 100 is opened on the side wall of the first connecting groove 102, and after the bolt is screwed into the screw hole, it extends into the first connecting groove 102 and squeezes and fixes the conveyor belt 10. Similarly, in the above-mentioned tensioning device including the fixing member 500, the fixing member 500 is used to fix the second connecting member 200. The fixing member 500 can be a bolt, and the screw hole of the second connecting member 200 is opened on the side wall of the second connecting groove 203. After the bolt is screwed into the screw hole, it extends into the second connecting groove 203 and squeezes and fixes the conveyor belt 10.

[0041] On the other hand, the utility model provides a transmission module, including any of the aforementioned tensioning devices, including the advantages of any of the aforementioned tensioning devices, which will not be repeated here.

[0042] The transmission module can be a variety of structures that drive the driven member 20 through the conveyor belt 10, such as the X-axis module, Y-axis module or scraper module in the three-dimensional printing device. In an optional embodiment, the transmission module includes a conveyor belt 10, a driven member 20 and a guide unit 30 in addition to the tensioning device. The conveyor belt 10 is movably connected to the guide unit 30, and the driven member 20 is slidably connected to the guide unit 30 and fixedly connected to the conveyor belt 10. The second connecting member 200 is connected to the driven member 20, and the first connecting member 100 is connected to the first end of the conveyor belt 10.

[0043] For example, the transmission module is an X-axis module, and the driven component 20 is a print head. The guide unit 30 may specifically include an X-axis guide frame, a power component and a steering wheel. The X-axis guide frame may be a profile bracket. The power component and the steering wheel are respectively connected to the two ends of the length direction of the X-axis guide frame, and the conveyor belt 10 is wound around the power component and the steering wheel. The print head is slidably connected to the X-axis guide frame, and the conveyor belt 10 is directly or indirectly connected to the print head through a tensioning device. The power component is used to drive the conveyor belt 10 to move, and then drive the print head to move along the X-axis guide frame in the X-axis direction.

[0044] In an optional embodiment, a second sliding hole is provided on the transmitted member 20, and the second sliding hole extends in the moving direction of the first connecting member 100. A first sliding hole 201 is provided on the second connecting member 200, and a screw hole is provided on the first connecting member 100. The second sliding hole is connected to the first sliding hole 201 on the second connecting member 200. After the first connecting member 100 slides through the second sliding hole and the first sliding hole 201, it is screwed to the first connecting member 100.

[0045] If the first sliding hole 201 and the second sliding hole are both bar-shaped holes, the first sliding hole 201 and the second sliding hole can overlap in the vertical direction. It can be understood that when the second connecting member 200 is a partial structure of the driven member 20, or when the second connecting member 200 and the driven member 20 are integrally formed, the second sliding hole and the first sliding hole 201 are different regions of a single hole. The positioning member 400 can be a bolt, and after the bolt passes through the second sliding hole and the first sliding hole 201, it is bolted to the first connecting member 100, and the bolt is in sliding contact with the second sliding hole and the first sliding hole 201, thereby achieving the guiding effect of the first connecting member 100. When the first connecting member 100 is in the locked position, the first connecting member 100 abuts against the outer side of the second sliding hole, which can achieve the aforementioned simultaneous fixing of the relative positions of the first connecting member 100, the second connecting member 200 and the driven member 20 mentioned in the above embodiment, thereby making the structural connection between the entire tensioning device and the driven member 20 tighter, the structure more compact, and the relative position stability of the first connecting member 100 and the second connecting member 200 better.

[0046] In an optional implementation, if Figure 7-9 As shown, the driven member 20 includes a print head, and the print head includes a print head body 21 and an extension plate 22. The print head body 21 and the conveyor belt 10 are respectively located on opposite sides of the guide unit 30, and the print head body 21 is slidably connected to the guide unit 30. The extension plate 22 is connected to the print head body 21, and the tensioning device is connected to the extension plate 22.

[0047] The print head body 21 is disposed at the front side of the guide unit 30, and the conveyor belt 10 is located at the rear side of the guide unit 30. The extension plate 22 extends backward from the print head body 21 to below the conveyor belt 10, and the extension plate 22 can extend horizontally. In the embodiment where the tensioning device includes the first connecting member 100 and the second connecting member 200, the first connecting member 100 and the second connecting member 200 can be fixed above the extension plate 22, and the extension plate 22 plays a role in supporting and fixing the first connecting member 100 and the second connecting member 200. In some embodiments, the extension plate 22 is provided with the aforementioned second sliding hole, and the extension plate 22 can also play a role in guiding the first connecting member 100 and / or the second connecting member 200.

[0048] The following is a description of the implementation method of the installation process: first connect the first end of the conveyor belt 10 to the second connecting member 200, manually pull the first connecting member 100 away from the second connecting member 200, the tensioning member 300 stores energy, and the first connecting member 100 moves to the second end of the conveyor belt 10 and connects with the second end of the conveyor belt 10. Figure 7 The first connecting member 100 is released, the tensioning member 300 releases energy and applies force to the first connecting member 100, the first connecting member 100 approaches the second connecting member 200, and the conveyor belt 10 is tightened, as shown in FIG. Figure 6Then move the second connecting member 200 to the driven member 20, use the fixing member 500 to fix the relative position of the second connecting member 200 and the driven member 20, and after the first connecting member 100 is in a stable position, use the positioning member 400 to fix the relative position of the first connecting member 100, the second connecting member 200 and the driven member 20, as shown. Fig. 9 After the installation is completed, when the conveyor belt 10 is deformed due to long-term use, the positioning member 400 can be loosened, and the first connecting member 100 will be close to the second connecting member 200 under the action of the tensioning member 300, and the positioning member 400 moves in the first sliding hole 201 and the second sliding hole to play a guiding role, thereby achieving tensioning of the conveyor belt 10, and then the first connecting member 100 can be fixed again.

[0049] On the other hand, the utility model provides a three-dimensional printing device, including any of the transmission modules described above, including the advantages of any of the transmission modules described above, which will not be repeated here. When the transmission module is an X-axis module, the three-dimensional printing device also includes a gantry unit, a base, and a printing platform. The printing platform is connected to the base by driving, the gantry unit is mounted on the printing platform, and the X-axis module is connected to the gantry unit by driving so that the print head is mounted on the printing platform.

[0050] The utility model also provides the following implementation modes:

[0051] Label 1. A tensioning device, comprising:

[0052] A first connecting member 100, the first connecting member 100 is used to connect a first end of the conveyor belt 10;

[0053] The second connecting member 200 and the tensioning member 300 are connected to the first connecting member 100 and the second connecting member 200. The tensioning member 300 is used to apply force to the first connecting member 100 so that the first connecting member 100 moves relative to the second connecting member 200 to tighten the conveyor belt 10;

[0054] The positioning member 400 , the position of the positioning member 400 at least includes a locking position. When the positioning member 400 is in the locking position, the positioning member 400 is connected to the first connecting member 100 and the second connecting member 200 to fix the relative positions of the first connecting member 100 and the second connecting member 200 .

[0055] Reference numeral 2. A tensioning device according to reference numeral 1, wherein:

[0056] The second connecting member 200 includes a conveyor belt fixing member, and the conveyor belt fixing member is used to connect the second end of the conveyor belt 10.

[0057] Reference numeral 3. A tensioning device according to reference numeral 1, wherein:

[0058] The conveyor belt is used to drive the driven member, the second connecting member 200 is fixedly connected to the driven member 20, and the tensioning device further includes a fixing member 500, the fixing member 500 is connected to the second connecting member 200, and the fixing member 500 is connected to the driven member 20 to fix the second connecting member 200;

[0059] Alternatively, the second connecting member 200 and the transmitted member 20 are formed integrally.

[0060] Reference numeral 4. A tensioning device according to reference numeral 1, wherein:

[0061] The first connecting member 100 and the second connecting member 200 are slidably connected.

[0062] Reference numeral 5. A tensioning device according to reference numeral 4, wherein:

[0063] A slide groove is provided on one of the first connecting member 100 and the second connecting member 200, and the slide groove extends in the moving direction of the first connecting member 100; a slider is provided on the other of the first connecting member 100 and the slider is slidably embedded in the slide groove;

[0064] Alternatively, a first sliding hole 201 is provided on one of the first connecting member 100 and the second connecting member 200, and a screw hole is provided on the other of the first connecting member 100 and the second connecting member 200. The first sliding hole 201 extends in the moving direction of the first connecting member 100. After the positioning member 400 slides through the first sliding hole 201, it is screwed with the screw hole of the other of the first connecting member 100 and the second connecting member 200.

[0065] Reference numeral 6. A tensioning device according to reference numeral 1, wherein:

[0066] The connection method of the tensioning member 300 and the first connecting member 100 and / or the second connecting member 200 includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding;

[0067] and / or, the tensioning member 300 comprises an elastic member;

[0068] And / or, the tensioning member 300 includes a tension spring.

[0069] Reference numeral 7. A tensioning device according to reference numeral 1, wherein:

[0070] The first connecting member 100 is provided with a first installation slot 101, the first end of the tensioning member 300 includes a first through hole 301, the first end of the tensioning member 300 extends into the first installation slot 101, and the tensioning device further includes a first plug-in 600, the first plug-in 600 is connected to the first connecting member 100 and the first through hole 301;

[0071] And / or, a second installation groove 202 is opened on the second connecting member 200, the second end of the tensioning member 300 includes a second through hole 302, the second end of the tensioning member 300 extends into the second installation groove 202, and the tensioning device also includes a second plug-in 700, and the second plug-in 700 is connected to the second connecting member 200 and the second through hole 302.

[0072] Reference numeral 8. A tensioning device according to reference numeral 1, wherein:

[0073] The first connecting member 100 is provided with a first connecting groove 102, and at least one side wall of the first connecting groove 102 corresponding to the engaging teeth on the conveyor belt 10 is a tooth-shaped side wall, and the first connecting groove 102 is used to plug the first end of the conveyor belt 10;

[0074] And / or, a second connecting member 200 is provided with a second connecting groove 203 , and at least one side wall of the second connecting groove 203 corresponding to the engaging teeth on the conveyor belt 10 is a toothed side wall, and the second connecting groove 203 is used for plugging the second end of the conveyor belt 10 .

[0075] Reference numeral 9. A tensioning device according to reference numeral 8, wherein:

[0076] When the positioning member 400 is in the locking position, the end of the positioning member 400 is located in the first connecting groove 102 to squeeze and fix the conveyor belt 10 .

[0077] Label 10. A transmission module, comprising a tensioning device as described in any one of the labels 1-9.

[0078] Reference numeral 11. The transmission module according to reference numeral 10, wherein the transmission module further comprises:

[0079] The conveyor belt 10 , the driven member 20 and the guide unit 30 , the conveyor belt 10 is movably connected to the guide unit 30 , the driven member 20 is slidably connected to the guide unit 30 , and is fixedly connected to the conveyor belt 10 .

[0080] Reference numeral 12. A transmission module according to reference numeral 11, wherein:

[0081] A second sliding hole is provided on the transmitted member 20, and the second sliding hole extends in the moving direction of the first connecting member 100. The second sliding hole is connected to the first sliding hole 201 on the second connecting member 200. A screw hole is provided on the first connecting member 100. After the positioning member 400 slides through the second sliding hole and the first sliding hole 201, it is screwed to the first connecting member 100.

[0082] Reference numeral 13. A transmission module according to reference numeral 11, wherein:

[0083] The driven member 20 includes a print head body 21 and an extension plate 22. The print head body 21 and the conveyor belt 10 are respectively located on opposite sides of the guide unit 30. The print head body 21 is slidably connected to the guide unit 30.

[0084] The extension plate 22 is connected to the print head body 21 , and the tensioning device is connected to the extension plate 22 .

[0085] Reference numeral 14. A transmission module according to reference numeral 11, wherein:

[0086] The connection method between the first connecting member 100 and the conveyor belt 10 includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding;

[0087] And / or, the connection method between the second connecting member 200 and the conveyor belt 10 includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding.

[0088] Label 15. A three-dimensional printing device, comprising a transmission module as described in any one of the above labels 10-14.

[0089] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A tensioning device, characterized in that: include: a first connecting member, the first connecting member being used to connect a first end of a conveyor belt; a second connecting member and a tensioning member, wherein the tensioning member is connected to the first connecting member and the second connecting member, and the tensioning member is used to apply force to the first connecting member so that the first connecting member moves relative to the second connecting member to tighten the conveyor belt; A positioning member, wherein the position of the positioning member at least includes a locking position. When the positioning member is in the locking position, the positioning member is connected to the first connecting member and the second connecting member to fix the relative position of the first connecting member and the second connecting member.

2. The tensioning device according to claim 1, characterized in that: The second connecting member includes a conveyor belt fixing member, and the conveyor belt fixing member is used to connect the second end of the conveyor belt.

3. The tensioning device according to claim 1, characterized in that: The conveyor belt is used to drive the driven member, the second connecting member is fixedly connected to the driven member, and the tensioning device further includes a fixing member, the fixing member is connected to the second connecting member, and the fixing member is connected to the driven member to fix the second connecting member; Alternatively, the second connecting member and the transmitted member are formed integrally.

4. The tensioning device according to claim 1, characterized in that: The first connecting member and the second connecting member are slidably connected.

5. The tensioning device according to claim 4, characterized in that: A slide groove is provided on one of the first connecting member and the second connecting member, and the slide groove extends in the moving direction of the first connecting member; a slider is provided on the other of the first connecting member and the second connecting member, and the slider is slidably embedded in the slide groove; Alternatively, a first sliding hole is provided on one of the first connecting member and the second connecting member, and a screw hole is provided on the other of the first connecting member and the second connecting member, the first sliding hole extends in the moving direction of the first connecting member, and the positioning member is slidably connected to the first sliding hole and then screwed to the screw hole of the other of the first connecting member and the second connecting member.

6. The tensioning device according to claim 1, characterized in that: The connection method between the tensioning member and the first connecting member and / or the second connecting member includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding; And / or, the tensioning member comprises an elastic member; And / or, the tensioning member comprises a tension spring.

7. The tensioning device according to claim 1, characterized in that: The first connecting member is provided with a first installation slot, the first end of the tensioning member includes a first through hole, the first end of the tensioning member extends into the first installation slot, and the tensioning device further includes a first plug-in, the first plug-in is connected to the first connecting member and the first through hole; And / or, a second mounting groove is formed on the second connecting member, the second end of the tensioning member includes a second through hole, the second end of the tensioning member extends into the second mounting groove, and the tensioning device also includes a second plug-in, and the second plug-in is connected to the second connecting member and the second through hole.

8. The tensioning device according to claim 1, characterized in that: The first connecting member is provided with a first connecting groove, at least one side wall of the first connecting groove corresponding to the engaging teeth on the conveyor belt is a tooth-shaped side wall, and the first connecting groove is used to plug the first end of the conveyor belt; And / or, a second connecting member is provided with a second connecting groove, and at least one side wall of the second connecting groove corresponding to the engaging teeth on the conveyor belt is a toothed side wall, and the second connecting groove is used for plugging the second end of the conveyor belt.

9. The tensioning device according to claim 8, characterized in that: When the positioning member is in the locking position, the end of the positioning member is located in the first connecting groove to squeeze and fix the conveyor belt.

10. A transmission module, characterized in that: A tensioning device comprising any one of claims 1 to 9.

11. The transmission module according to claim 10, characterized in that: The transmission module also includes: A conveyor belt, a driven member and a guide unit, wherein the conveyor belt is movably connected to the guide unit, and the driven member is slidably connected to the guide unit and fixedly connected to the conveyor belt.

12. The transmission module according to claim 11, characterized in that: The transmitted member is provided with a second sliding hole, the second sliding hole extends in the moving direction of the first connecting member, the second sliding hole is connected with the first sliding hole on the second connecting member, the first connecting member is provided with a screw hole, and the positioning member is slidably connected to the second sliding hole and the first sliding hole, and then screwed to the first connecting member.

13. The transmission module according to claim 11, characterized in that: The driven member comprises a print head body and an extension plate, the print head body and the conveyor belt are respectively located on opposite sides of the guide unit, and the print head body is slidably connected to the guide unit; The extension plate is connected to the print head body, and the tensioning device is connected to the extension plate.

14. The transmission module according to claim 11, characterized in that: The connection method between the first connecting member and the conveyor belt includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding; And / or, the connection method between the second connecting member and the conveyor belt includes at least one of snap connection, hanging connection, plug connection, screw connection, clamping, bonding and welding.

15. A three-dimensional printing device, characterized in that: It comprises a transmission module as described in any one of claims 10 to 14 above.

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