WO2022105021A1 - 一种同步带张紧结构及3d打印机 - Google Patents

一种同步带张紧结构及3d打印机 Download PDF

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Publication number
WO2022105021A1
WO2022105021A1 PCT/CN2020/140120 CN2020140120W WO2022105021A1 WO 2022105021 A1 WO2022105021 A1 WO 2022105021A1 CN 2020140120 W CN2020140120 W CN 2020140120W WO 2022105021 A1 WO2022105021 A1 WO 2022105021A1
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WO
WIPO (PCT)
Prior art keywords
frame
movable frame
tensioning structure
belt tensioning
synchronous belt
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PCT/CN2020/140120
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English (en)
French (fr)
Inventor
刘辉林
唐京科
陈春
敖丹军
罗孝武
Original Assignee
深圳市创想三维科技有限公司
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Publication of WO2022105021A1 publication Critical patent/WO2022105021A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/118—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using filamentary material being melted, e.g. fused deposition modelling [FDM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227—Driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/14—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of a driving or driven pulley

Definitions

  • the utility model relates to the technical field of 3D printing equipment, in particular to a synchronous belt tensioning structure and a 3D printer.
  • 3D printing namely rapid prototyping technology
  • rapid prototyping technology is a cumulative manufacturing technology, also known as additive manufacturing. It is based on digital model files and uses adhesive materials such as special wax materials, powdered metals or plastics to print layer by layer. adhesive materials to create three-dimensional objects.
  • adhesive materials such as special wax materials, powdered metals or plastics to print layer by layer. adhesive materials to create three-dimensional objects.
  • fused deposition rapid prototyping also known as hot melt deposition technology
  • the technology is to heat and melt the hot-melt filament and extrude it from the nozzle, deposit it on the printing work platform or the previous layer of solidified material, and start to solidify when the temperature is lower than the solidification temperature of the filament, and finally print into a solid.
  • 3D printers mainly use a motor to drive a synchronous belt drive, which in turn drives the nozzle to move to realize the spatial 3D movement of the nozzle.
  • the following schemes are usually used to tension the synchronous belt: the synchronous belt is tensioned by setting a tensioning wheel; the synchronous belt is tensioned by manually adjusting the synchronous wheel fixing plate. .
  • the above settings have the following problems: for the first solution, the adjustable range is large, but the structure is complex and the cost is high; for the second solution, the structure is relatively simple, but the length accuracy of the synchronous belt is high, and the The adjustment range is small.
  • the purpose of the present invention is to provide a synchronous belt tensioning structure and a 3D printer, which have a large adjustable range, simple structure and low cost.
  • a timing belt tensioning structure is used for tensioning a timing belt, and both ends of the timing belt are respectively sleeved with a driving wheel and a driven wheel, comprising:
  • the driven wheel is rotatably mounted on the movable frame, and the movable frame and the fixed frame are relatively slidingly arranged;
  • the drive assembly is connected with the movable frame in a transmission manner, and drives the movable frame to move back and forth relative to the fixed frame, so that the driven pulley is away from or close to the driving pulley to realize the tensioning of the synchronous belt.
  • a guide hole is provided on the fixed frame, a first fastener is slidably installed in the guide hole, and the movable frame is slidably connected to the guide hole through the first fastener, so that the The movable frame can slide relative to the fixed frame, and the structure is simple and easy to implement.
  • the driven wheel is rotatably sleeved on the driven wheel shaft, and the first fastener includes a bolt and a nut;
  • the movable frame is provided with a first installation hole
  • the driven wheel shaft is provided with a second installation hole
  • the bolt passes through the guide hole, the first installation hole, the second installation hole and the
  • the nut is threadedly connected to realize the installation of the driven wheel shaft, to ensure the smooth use of the subsequent driven wheel, and to relatively fix the driven wheel shaft and the movable frame.
  • the fixed frame includes a detachably connected fixed body and an installation frame, the fixed body is mounted with the driving wheel, and the movable frame is slidably connected to the installation frame to realize the installation frame and the movable frame.
  • the split design of the frame and the fixed body is convenient for disassembly and maintenance.
  • the movable frame is sleeved on the outside of the driven wheel, and the installation frame is sleeved on the outside of the movable frame, so that the overall structure is more compact and the installation space is saved.
  • the mounting frame is provided with a third mounting hole
  • the fixing body is provided with a fourth mounting hole
  • the timing belt tensioning structure further includes a second fastener, the second fastener is fixedly connected in the fourth installation hole through the third installation hole, so as to realize the connection between the installation frame and the fixed body detachable connection.
  • the drive assembly includes a drive screw
  • the movable frame is connected to the fixed frame through the drive screw, and when the drive screw rotates, the movable frame moves along the drive relative to the fixed frame
  • the axial direction of the screw moves back and forth, and the structure is simple and easy to use.
  • the fixed frame is provided with a through hole
  • the drive screw is arranged through the through hole
  • the first end of the drive screw is threadedly connected to the movable frame, so that when the drive screw rotates,
  • the movable frame can be driven to move back and forth relative to the fixed frame.
  • the second end of the drive screw extends out of the fixing frame and is fixedly connected with a hand-tightening nut, and the drive screw can be rotated by hand-tightening the nut, which is convenient and quick to operate.
  • the preset direction is the radial direction of the driven wheel.
  • the utility model also provides a 3D printer, which includes the synchronous belt tensioning structure as described above.
  • the utility model provides a synchronous belt tensioning structure and a 3D printer.
  • a fixed frame and a movable frame slidably connected to the fixed frame, and installing a driven wheel on the movable frame, when the driving wheel remains stationary, the The drive assembly drives the movable frame to slide relative to the fixed frame, and then drives the driven wheel to move, so that the driven wheel is away from the driving wheel, and the synchronous belt is tensioned.
  • the adjustable range of the synchronous belt tensioning structure is large, the number of parts is small, the structure is simple, and the cost is low.
  • FIG. 1 is a schematic diagram of the overall structure of the connection between the synchronous belt tensioning structure and the synchronous belt assembly provided by the embodiment of the present invention
  • Fig. 2 is the partial three-dimensional exploded schematic diagram that the timing belt tensioning structure that the utility model embodiment provides is connected with the timing belt assembly;
  • FIG. 3 is a schematic top view of the mounting frame in the synchronous belt tensioning structure provided by the embodiment of the present invention.
  • connection should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or a fixed connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements.
  • connection may be a fixed connection, a detachable connection, or a fixed connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two elements or an interaction relationship between the two elements.
  • specific meanings of the above terms in the present invention can be understood in specific situations.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features The features are not in direct contact but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • a first feature “below”, “below” and “below” a second feature includes that the first feature is directly and diagonally below the second feature, or simply means that the first feature is horizontally lower than the second feature.
  • the synchronous belt tensioning structure includes a fixed frame 1 , a movable frame 3 and a drive assembly 4 .
  • the driven wheel 24 is rotatably mounted on the movable frame 3 , and the movable frame 3 is slidably connected to the fixed frame 1 .
  • the drive assembly 4 is drive-connected with the movable frame 3 to drive the movable frame 3 to move back and forth relative to the fixed frame 1 , so that the driven wheel 24 is away from or close to the driving wheel 22 .
  • the driving pulley 22 when the synchronous belt 23 needs to be tensioned, the driving pulley 22 is kept stationary, and the movable frame 3 is driven to slide relative to the fixed frame 1 by the driving component 4, so as to drive the driven pulley 24 to move, so that the driven pulley 24 can be driven to move.
  • the driving pulley 24 is away from the driving pulley 22 to realize the tension of the synchronous belt 23 .
  • the adjustable range of the synchronous belt tensioning structure is large, and the number of parts and components is small, the structure is simple, and the cost is low.
  • the moving direction of the movable frame 3 is the connecting direction of the driving wheel 22 and the driven wheel 24 .
  • the movable frame 3 can make the driven wheel 24 move away from or approach the driving wheel 22 relatively quickly in the above-mentioned direction, which is more convenient to use.
  • connection structure of the fixed frame 1 and the movable frame 3 will be introduced with reference to FIG. 1 and FIG. 2 .
  • the fixed frame 1 is provided with a guide hole 1211, and the movable frame 3 is slidably connected to the guide hole 1211 through the first fastener 5. At this time, moving the first fastener 5 along the guide hole 1211 can ensure that the movable frame 3 can slide relative to the fixed frame 1 .
  • the guide hole 1211 is a bar-shaped hole, and the length direction of the bar-shaped hole is consistent with the connection direction of the driving wheel 22 and the driven wheel 24 .
  • the driven wheel 24 is rotatably sleeved on the driven wheel shaft 25
  • the first fastener 5 includes a bolt 51 and a nut 52 .
  • the movable frame 3 is provided with a first mounting hole
  • the driven wheel shaft 25 is provided with a second mounting hole.
  • the bolt 51 passes through the guide hole 1211 , the first mounting hole and the second mounting hole and is threadedly connected to the nut 52 .
  • the driven axle 25 can be installed, and the fixed between the driven axle 25 and the movable frame 3 can be realized through the cooperation of the bolt 51 and the nut 52 .
  • both the rotation of the driven wheel 24 and the sliding of the movable frame 3 can be ensured.
  • the driven wheel 24 is a bearing structure for ease of use.
  • the structure of the fixing frame 1 is also set to a certain extent.
  • the fixing frame 1 includes a fixing body 11 and a mounting frame 12 that are detachably connected to each other.
  • the fixed body 11 is used to connect the driving pulley 22 so as to keep the driving pulley 22 stationary when the synchronous belt 23 is tensioned.
  • the movable frame 3 is slidably connected to the installation frame 12, thereby realizing the separate design of the installation frame 12 and the movable frame 3 and the fixed body 11, which facilitates the disassembly and maintenance of the installation frame 12 and the movable frame 3, etc.
  • the mounting bracket 12 is provided with a third mounting hole 123
  • the fixing body 11 is provided with a fourth mounting hole.
  • a second fastener 6 is provided in the synchronous belt tensioning structure, and the second fastener 6 is fixedly connected in the fourth installation hole through the third installation hole 123 to realize the installation frame 12 and the fixed body 11 Detachable connection between.
  • the second fastener 6 is a screw
  • the third installation hole 123 is a light hole
  • the fourth installation hole is a threaded hole.
  • the movable frame 3 is sleeved on the outside of the driven wheel 24, and the installation frame 12 is sleeved on the outside of the movable frame 3, so that the overall structure is more compact and the installation space is saved.
  • the movable frame 3 is a concave-shaped plate, and the driven wheel 24 is installed in the opening of the movable frame 3 .
  • the mounting bracket 12 includes a main board 121 and a side board 122 .
  • the main board 121 is also an indented board, and the movable frame 3 is installed in the opening of the main board 121 .
  • the side plate 122 is an L-shaped plate and is fixed to the side of the main board 121 .
  • the guide holes 1211 are arranged on the main board 121 .
  • a third mounting hole 123 is respectively provided on the main plate 121 and the side plate 122 to respectively pass a second fastener 6 to make the connection between the mounting frame 12 and the fixing body 11 more firm.
  • the mounting frame 12 and the movable frame 3 are both formed by bending or welding plates, which do not require mold opening, have low cost, and have a short manufacturing cycle.
  • the drive assembly 4 includes a drive screw 41 , and the movable frame 3 is connected to the fixed frame 1 through the drive screw 41 .
  • the drive screw 41 rotates, the movable frame 3 moves back and forth relative to the fixed frame 1 along the axial direction of the drive screw 41 .
  • the fixing frame 1 is provided with a through hole, and the transmission screw 41 is disposed through the through hole.
  • the first end of the drive screw 41 is connected with the movable frame 3 in a threaded drive. According to this, when the drive screw 41 is rotated, the movable frame 3 can be driven to slide relative to the fixed frame 1 by the drive screw 41 , and the structure is very simple and easy to use.
  • the openings of the main board 121 and the movable frame 3 are both disposed toward the fixed body 11 , and the movable frame 3 and the mounting frame 12 cannot rotate relative to each other.
  • the through hole is opened on the middle plate of the main board 121 , and the first end of the drive screw 41 passes through the middle plate of the main board 121 and is threadedly connected to the middle plate of the movable frame 3 .
  • the drive screw 41 can also be fixedly connected to the movable frame 3, and the drive screw 41 is threadedly connected to the mounting frame 12. It is also possible to adjust the movable frame 3 and the mounting frame 12 by controlling the drive screw 41.
  • the relative movement occurs between the driving screw 41 and the mounting frame 12, which in turn drives the fixedly connected movable frame 3 to move relative to the mounting frame 12, thereby achieving the adjustment of the relative position of the movable frame 3 and the mounting frame 12.
  • the purpose is to realize the mutual distance or approach between the driven wheel 24 and the driving wheel 22 .
  • the second end of the drive screw 41 extends out of the fixing frame 1 and is fixedly connected with a thumb nut 42 .
  • the drive screw 41 can be rotated by twisting the hand nut 42, which makes the operation more convenient and quicker, and because there is no need to provide additional driving parts such as motors, it is beneficial to save installation space and reduce costs.
  • this embodiment provides a timing belt tensioning structure.
  • the movable frame 3 can be driven to slide relative to the fixed frame 1, and then the movable frame 3 drives the driven wheel 24 away from the driving wheel 22.
  • the tension of the timing belt 23 is achieved.
  • the synchronous belt tensioning structure is simple to install, has a large adjustable range, and has a small number of components and a low cost.
  • the structures such as the mounting frame 12 and the movable frame 3, since there is no need to open the mold for manufacturing, it is beneficial to further reduce the cost and shorten the manufacturing cycle.
  • This embodiment also provides a 3D printer, which includes the synchronous belt tensioning structure described in Embodiment 1. Further, the 3D printer is also provided with a timing belt assembly 2 , and the driving wheel 22 , the timing belt 23 , the driven wheel 24 and the driven wheel shaft 25 are all components of the timing belt assembly 2 . At the same time, a driving motor 21 is arranged in the synchronous belt assembly 2 , and the output end of the driving motor 21 is connected with the driving wheel 22 to drive the driving wheel 22 to rotate, and then the driven wheel 24 is driven to rotate through the synchronous belt 23 .
  • the mounting base material in the body frame of the 3D printer is used as the fixing body 11, and no additional manufacturing is required, which is beneficial to saving costs.
  • a fourth mounting hole should be processed on the mounting base material according to actual needs, so as to facilitate the mounting of the second fastener 6 .
  • the 3D printer is also provided with a nozzle for printing.
  • the driven wheel 24 in the synchronous belt tensioning structure is in driving connection with the spray head to drive the spray head to move. Since the structure of the spray head is in the prior art, it will not be repeated here.

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Abstract

一种同步带张紧结构，该同步带张紧结构用于张紧同步带（23），同步带（23）的两端分别套设有主动轮（22）和从动轮（24），该同步带张紧结构包括固定架（1）、活动架（3）和驱动组件（4），从动轮（24）转动安装在活动架（3）上，活动架（3）与固定架（1）相对滑动设置，驱动组件（4）与活动架（3）传动连接，并带动活动架（3）相对于固定架（1）来回移动，以使从动轮（24）远离或靠近主动轮（22）。以及一种包括该同步带张紧结构的3D打印机。通过该同步带张紧结构进行同步带的张紧时，其可调节幅度较大，且该同步带张紧结构的零部件数量少，结构简单，成本较低。

Description

一种同步带张紧结构及3D打印机 技术领域
本实用新型涉及3D打印设备技术领域，尤其涉及一种同步带张紧结构及3D打印机。
背景技术
3D打印即快速成型技术，是一种累积制造技术，又称为增材制造，它以数字模型文件为基础，运用特殊蜡材、粉末状金属或塑料等可粘合材料，通过打印一层层的粘合材料来制造三维物体。其中，熔融沉积快速成型技术(FDM)，又称热熔堆积技术，是主要的3D打印技术之一。该技术是将热熔型料丝加热融化后从喷头挤出，沉积在打印工作平台或前一层已固化的材料上，当温度低于料丝固化温度后开始固化成型，最终打印成实体。
目前，3D打印机主要使用电机驱动同步带传动，进而带动喷头移动实现喷头的空间3D运动。在此工作过程中，为保证同步带的精确传动，通常采用以下方案进行同步带的张紧：通过设置张紧轮实现同步带的张紧；通过手动调节同步轮固定板实现同步带的张紧。然而，以上设置存在以下问题：对于第一种方案，其可调节幅度大，但结构较为复杂，成本较高；对于第二种方案，其结构相对简单，但对同步带长度精度要求高，可调节幅度小。
基于此，亟需一种同步带张紧结构及3D打印机，用以解决上述问题。
实用新型内容
本实用新型的目的在于提供一种同步带张紧结构及3D打印机， 可调节幅度较大，且结构简单，成本较低。
为达此目的，本实用新型采用以下技术方案：
一种同步带张紧结构，用于张紧同步带，所述同步带的两端分别套设有主动轮和从动轮，包括：
固定架；
活动架，所述从动轮转动安装在所述活动架上，所述活动架与所述固定架相对滑动设置；
驱动组件，与所述活动架传动连接，并带动所述活动架相对于所述固定架来回移动，以使所述从动轮远离或靠近所述主动轮，实现对同步带的张紧。
可选地，所述固定架上设置有导向孔，所述导向孔中滑动安装有第一紧固件，所述活动架通过所述第一紧固件与所述导向孔滑动连接，以使活动架可以相对固定架滑动，结构简单，易于实施。
可选地，所述从动轮转动套设在从动轮轴上，所述第一紧固件包括螺栓和螺母；
所述活动架上设置有第一安装孔，所述从动轮轴上设置有第二安装孔，所述螺栓同时穿过所述导向孔、所述第一安装孔、所述第二安装孔与所述螺母螺纹连接，以实现从动轮轴的安装，保证后续从动轮的顺利使用，并使从动轮轴与活动架相对固定。
可选地，所述固定架包括可拆卸连接的固定本体和安装架，所述固定本体上安装有所述主动轮，所述活动架滑动连接于所述安装架上，以实现安装架和活动架与固定本体的分体设计，便于拆装和维护。
可选地，所述活动架套设在所述从动轮的外部，所述安装架套设在所述活动架的外部，以使整体结构更加紧凑，节约安装空间。
可选地，所述安装架上设置有第三安装孔，所述固定本体上设置有第四安装孔；
所述同步带张紧结构还包括第二紧固件，所述第二紧固件穿过所述第三安装孔固定连接在所述第四安装孔内，以实现安装架和固定本体之间的可拆卸连接。
可选地，所述驱动组件包括传动螺杆，所述活动架通过所述传动螺杆与所述固定架连接，当所述传动螺杆转动时，所述活动架相对于所述固定架沿所述传动螺杆的轴向来回移动，结构简单，易于使用。
可选地，所述固定架上设置有通孔，所述传动螺杆穿过所述通孔设置，且所述传动螺杆的第一端与所述活动架螺纹传动连接，以使传动螺杆转动时可带动活动架相对固定架来回移动。
可选地，所述传动螺杆的第二端伸出与所述固定架外且固定连接有手拧螺母，通过手拧螺母即可转动传动螺杆，操作简便快捷。
可选地，所述预设方向为所述从动轮的径向。
本实用新型还提供了一种3D打印机，其包括如上所述的同步带张紧结构。
本实用新型的有益效果：
本实用新型提供了一种同步带张紧结构及3D打印机，通过设置固定架和滑动连接于固定架的活动架，并将从动轮安装在活动架上，可在主动轮保持不动时，通过驱动组件驱动活动架相对固定架进行滑动，进而带动从动轮移动，使从动轮远离主动轮，实现同步带的张紧。整体来看，该同步带张紧结构的可调节幅度较大，且零部件数量少，结构简单，成本较低。
附图说明
图1是本实用新型实施例提供的同步带张紧结构与同步带组件连接的整体结构示意图；
图2是本实用新型实施例提供的同步带张紧结构与同步带组件 连接的局部立体分解示意图；
图3是本实用新型实施例提供的同步带张紧结构中安装架的俯视示意图。
图中：
1、固定架；11、固定本体；12、安装架；121、主板；1211、导向孔；122、侧板；123、第三安装孔；2、同步带组件；21、驱动电机；22、主动轮；23、同步带；24、从动轮；25、从动轮轴；3、活动架；4、驱动组件；41、传动螺杆；42、手拧螺母；5、第一紧固件；51、螺栓；52、螺母；6、第二紧固件。
具体实施方式：
为使本实用新型解决的技术问题、采用的技术方案和达到的技术效果更加清楚，下面结合附图并通过具体实施方式来进一步说明本实用新型的技术方案。
在本实用新型的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本实用新型中的具体含义。
在本实用新型中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高 度小于第二特征。
在本实施例的描述中，术语“上”、“下”、“左”、“右”等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本实用新型的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
本申请的一些实施方式作详细说明。在不冲突的情况下，下述的实施方式及实施方式中的特征可以相互组合。
实施例1
本实施例提供了一种同步带张紧结构，该同步带张紧结构用于张紧同步带23，在同步带23的两端分别套设有主动轮22和从动轮24。如图1和图2所示，该同步带张紧结构包括固定架1、活动架3和驱动组件4。其中，从动轮24转动安装在活动架3上，活动架3与固定架1滑动连接。驱动组件4与活动架3传动连接以带动活动架3相对固定架1来回移动，使从动轮24远离或靠近主动轮22。
按以上设置，当需对同步带23进行张紧时，使主动轮22保持不动，通过驱动组件4驱动活动架3相对固定架1进行滑动，即可带动从动轮24移动，从而能够使从动轮24远离主动轮22，实现同步带23的张紧。整体来看，该同步带张紧结构的可调节幅度较大，且其零部件数量少，结构简单，成本较低。
本实施例中，活动架3的移动方向为主动轮22和从动轮24的连线方向。此时，通过活动架3可使从动轮24沿上述方向较为快速地远离或靠近主动轮22，更加便于使用。
下面，结合图1和图2，对固定架1和活动架3的连接结构进行介绍。
可选地，固定架1上设置有导向孔1211，活动架3通过第一紧 固件5与导向孔1211滑动连接。此时，使第一紧固件5沿导向孔1211移动，即可保证活动架3能够相对固定架1进行滑动。本实施例中，导向孔1211为条形孔，该条形孔的长度方向与主动轮22和从动轮24的连线方向一致。
进一步地，从动轮24转动套设在从动轮轴25上，第一紧固件5包括螺栓51和螺母52。同时，在活动架3上设置有第一安装孔，从动轮轴25上设置有第二安装孔，螺栓51同时穿过导向孔1211、第一安装孔、第二安装孔与螺母52螺纹连接。按以上设置，可实现从动轮轴25的安装，并通过螺栓51和螺母52的配合实现从动轮轴25与活动架3之间的固定。在此基础上，既可保证从动轮24的转动，又可保证活动架3的滑动。可选地，从动轮24为轴承结构，以便于使用。
本实施例中，为便于该同步带张紧结构的安装和维护，还对固定架1的结构进行了一定设置。可选地，如图1和图2所示，固定架1包括相互可拆卸连接的固定本体11和安装架12。其中，固定本体11用于连接主动轮22，以便于在张紧同步带23时使主动轮22保持不动。同时，活动架3滑动连接于安装架12上，从而实现了安装架12和活动架3等结构与固定本体11的分体设计，便于安装架12和活动架3等的拆装和维护。
具体地，在安装架12上设置有第三安装孔123，固定本体11上设置有第四安装孔。同时，在该同步带张紧结构中设置有第二紧固件6，第二紧固件6穿过第三安装孔123固定连接在第四安装孔内，以实现安装架12和固定本体11之间的可拆卸连接。可选地，第二紧固件6为螺丝，第三安装孔123为光孔，第四安装孔为螺纹孔。
进一步地，活动架3套设在从动轮24的外部，安装架12套设在活动架3的外部，以使整体结构更加紧凑，节约安装空间。
本实施例中，如图1-图3所示，活动架3为匚形板，从动轮24安装在活动架3的开口内。安装架12包括主板121和侧板122。其中，主板121也为匚形板，活动架3安装在主板121的开口内。侧板122则为L形板，固定在主板121的侧部。此外还可看到，导向孔1211设置在主板121上。在主板121和侧板122上各设有一个第三安装孔123，以分别穿设一个第二紧固件6，使安装架12和固定本体11之间的连接更加牢固。
本实施例中，安装架12和活动架3均由板材弯折或焊接连接而成，无需开模，成本低，且制造周期短。
下面，对驱动组件4的具体结构进行介绍。
可选地，如图1和图2所示，驱动组件4包括传动螺杆41，活动架3通过传动螺杆41与固定架1连接。当传动螺杆41转动时，活动架3相对于固定架1沿传动螺杆41的轴向来回移动。
具体地，在固定架1上设置有通孔，传动螺杆41穿过该通孔设置。同时，传动螺杆41的第一端与活动架3螺纹传动连接。按此，当传动螺杆41转动时，即可通过传动螺杆41带动活动架3相对固定架1滑动，该结构十分简单，易于使用。
本实施例中，主板121和活动架3的开口均朝向固定本体11设置，且活动架3和安装架12之间无法发生相对转动。此时，通孔开设在主板121的中间板上，传动螺杆41的第一端穿过主板121的中间板与活动架3的中间板螺纹传动连接。
作为变形的实施方式，还可以采用传动螺杆41与活动架3固定连接，并且传动螺杆41与安装架12螺纹连接的方式，同样可以达到通过控制传动螺杆41来调节活动架3与安装架12相对位置的目的，具体的，传动螺杆41的第一端与活动架3固定连接，安装架12上开设有与传动螺杆41相适配的螺纹孔，传动螺杆41对应穿过螺纹孔，当旋转传动螺杆41时，传动螺杆41与安装架12之间发生 相对移动，进而带动与之固定连接的活动架3相对于安装架12发生相对移动，从而达到了调节活动架3与安装架12相对位置的目的，即实现了从动轮24与主动轮22之间的相互远离或靠近。
进一步地，传动螺杆41的第二端伸出与固定架1外且固定连接有手拧螺母42。此时，通过拧动手拧螺母42即可转动传动螺杆41，使操作更加简便快捷，且由于无需设置额外的电机等驱动件，利于节约安装空间并降低成本。
综上，本实施例提供了一种同步带张紧结构，当拧动手拧螺母42时，可驱动活动架3相对固定架1进行滑动，进而通过活动架3带动从动轮24远离主动轮22，实现同步带23的张紧。整体来看，该同步带张紧结构安装简单，可调节幅度较大，且其零部件数量少，成本较低。同时，对于安装架12和活动架3等结构而言，由于无需开模制造，利于进一步降低成本，缩短制造周期。
实施例2
本实施例还提供了一种3D打印机，其包括如实施例1所述的同步带张紧结构。进一步地，该3D打印机中还设置有同步带组件2，主动轮22、同步带23、从动轮24和从动轮轴25均为同步带组件2的组成部分。同时，在同步带组件2中设置有驱动电机21，驱动电机21的输出端与主动轮22传动连接，以带动主动轮22转动，进而通过同步带23带动从动轮24转动。
本实施例中，该3D打印机本体框架中的安装基材用作固定本体11，无需再额外制造，利于节约成本。当然，根据实际需要应在安装基材上加工第四安装孔，以便于安装第二紧固件6。
此外，在该3D打印机中还设置有用于打印的喷头。同步带张紧结构中的从动轮24与喷头传动连接，以带动喷头运动。由于喷头的结构为现有技术，所以在此不再赘述。
以上内容仅为本实用新型的较佳实施例，对于本领域的普通技 术人员，依据本实用新型的思想，在具体实施方式及应用范围上均会有改变之处，本说明书内容不应理解为对本实用新型的限制。

Claims (10)

  1. 一种同步带张紧结构，用于张紧同步带(23)，所述同步带(23)的两端分别套设有主动轮(22)和从动轮(24)，其特征在于，包括：
    固定架(1)；
    活动架(3)，所述从动轮(24)转动安装在所述活动架(3)上，所述活动架(3)与所述固定架(1)相对滑动设置；
    驱动组件(4)，与所述活动架(3)传动连接，并带动所述活动架(3)相对于所述固定架(1)来回移动，以使所述从动轮(24)远离或靠近所述主动轮(22)。
  2. 根据权利要求1所述的同步带张紧结构，其特征在于，所述固定架(1)上设置有导向孔(1211)，所述导向孔(1211)中滑动安装有第一紧固件(5)，所述活动架(3)通过所述第一紧固件(5)与所述导向孔(1211)滑动连接。
  3. 根据权利要求2所述的同步带张紧结构，其特征在于，所述从动轮(24)转动套设在从动轮轴(25)上，所述第一紧固件(5)包括螺栓(51)和螺母(52)；
    所述活动架(3)上设置有第一安装孔，所述从动轮轴(25)上设置有第二安装孔，所述螺栓(51)同时穿过所述导向孔(1211)、所述第一安装孔、所述第二安装孔与所述螺母(52)螺纹连接。
  4. 根据权利要求1-3中任一项所述的同步带张紧结构，其特征在于，所述固定架(1)包括可拆卸连接的固定本体(11)和安装架(12)，所述固定本体(11)上安装有所述主动轮(22)，所述活动架(3)滑动连接于所述安装架(12)上。
  5. 根据权利要求4所述的同步带张紧结构，其特征在于，所述活动架(3)套设在所述从动轮(24)的外部，所述安装架(12)套设在所述活动架(3)的外部。
  6. 根据权利要求4所述的同步带张紧结构，其特征在于，所述安装架(12)上设置有第三安装孔(123)，所述固定本体(11)上 设置有第四安装孔；
    所述同步带张紧结构还包括第二紧固件(6)，所述第二紧固件(6)穿过所述第三安装孔(123)固定连接在所述第四安装孔内。
  7. 根据权利要求1-3中任一项所述的同步带张紧结构，其特征在于，所述驱动组件(4)包括传动螺杆(41)，所述活动架(3)通过所述传动螺杆(41)与所述固定架(1)连接，当所述传动螺杆(41)转动时，所述活动架(3)相对于所述固定架(1)沿所述传动螺杆(41)的轴向来回移动。
  8. 根据权利要求7所述的同步带张紧结构，其特征在于，所述固定架(1)上设置有螺纹通孔，所述传动螺杆(41)螺纹连接在所述螺纹通孔内，并且所述传动螺杆(41)穿过所述螺纹通孔设置，且所述传动螺杆(41)的第一端与所述活动架(3)固定螺纹传动连接。
  9. 根据权利要求8所述的同步带张紧结构，其特征在于，所述传动螺杆(41)的第二端伸出与所述固定架(1)外且固定连接有手拧螺母(42)。
  10. 一种3D打印机，其特征在于，包括如权利要求1-9任一项所述的同步带张紧结构。
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