WO2014135101A1 - 真空气泵及擦玻璃装置 - Google Patents

真空气泵及擦玻璃装置 Download PDF

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Publication number
WO2014135101A1
WO2014135101A1 PCT/CN2014/072978 CN2014072978W WO2014135101A1 WO 2014135101 A1 WO2014135101 A1 WO 2014135101A1 CN 2014072978 W CN2014072978 W CN 2014072978W WO 2014135101 A1 WO2014135101 A1 WO 2014135101A1
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WO
WIPO (PCT)
Prior art keywords
air pump
piston
vacuum
rotating shaft
groove
Prior art date
Application number
PCT/CN2014/072978
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English (en)
French (fr)
Inventor
冯勇兵
Original Assignee
科沃斯机器人科技(苏州)有限公司
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Filing date
Publication date
Application filed by 科沃斯机器人科技(苏州)有限公司 filed Critical 科沃斯机器人科技(苏州)有限公司
Priority to US14/772,938 priority Critical patent/US20160106278A1/en
Priority to EP14760143.9A priority patent/EP2966300A1/en
Publication of WO2014135101A1 publication Critical patent/WO2014135101A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L1/00—Cleaning windows
    • A47L1/02—Power-driven machines or devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/009—Details of suction cleaner tools for additional purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/10—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use
    • F04B37/14—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for special use to obtain high vacuum

Definitions

  • the invention relates to a vacuum air pump and a glass cleaning device, and belongs to the technical field of mechanical manufacturing. Background technique
  • Fig. 1 is a schematic view showing the structure of a conventional vacuum air pump
  • Fig. 2 is a sectional view showing a conventional vacuum air pump. As shown in FIG. 1 and in conjunction with FIG.
  • the vacuum pump includes two cylinders A and B, and each cylinder A or B includes an intake port 100A, 100B and an air outlet 200A, 200B, respectively, wherein the intake holes 100A, 100B
  • the suction cups are connected, and the weights 300 are radially overlapped on the motor shaft 500 through the eccentric shaft 400, wherein the bearing inner ring is fixed to the eccentric shaft 400, the piston rods 600A and 600B are fixed to the bearing outer ring, and the two piston rods 600A and 600B are opposite. Therefore, when the motor 700 rotates, the two piston rods 600A and 600B are relatively telescopically moved by the bearing 300, so that the two cylinders A and B are separately pumped and exhausted, so that the suction cup is continuously pumped. Gas to maintain the vacuum inside the suction cup.
  • the vacuum pump described above uses only a pair of pistons to evacuate, so that the flow rate of the air pump is small. If the suction cup is lifted up by particles on the surface of the glass, the degree of vacuum is quickly lost, so that the body falls from the glass surface. If the air pump flow is increased, the vacuum can be immediately restored even if the suction cup leaks, thereby preventing the body from falling.
  • the piston rod can only be superimposed on the motor shaft, which makes the vacuum pump have a large axial length, a redundant structure, and a compact structure, so that the glass cleaning robot The volume of the shape is greatly affected. Summary of the invention
  • the technical problem to be solved by the present invention is to provide a vacuum air pump and a glass cleaning device according to the deficiencies of the prior art.
  • the vacuum air pump can increase the number of piston air pump components as needed, and keep the structure simple and compact while increasing the flow rate of the air pump.
  • the glass cleaning device of the vacuum pump described above since the flow rate of the vacuum air pump is large, even if the suction cup is lifted up by the particles on the surface of the glass, the degree of vacuum is not quickly lost, and the phenomenon that the body of the glass-wiping device falls from the glass surface is effectively prevented. happened.
  • a vacuum air pump includes a driving motor, a gas pump body and a piston air pump assembly disposed on the air pump body, wherein the air pump body is provided with a rotating shaft, and the driving motor transmits power to the rotating shaft through a transmission mechanism, and a rotating wheel is fixed on the rotating shaft
  • One side surface of the runner is provided with a variable diameter annular limiting groove
  • at least two of the piston air pump components are disposed around the air pump body, and the piston rod end of each piston air pump assembly is provided with a rolling element, the rolling The component is embedded in the variable-diameter annular limiting groove, and the rotating shaft drives the rotating wheel to rotate.
  • the rolling element rolls in the circumferential direction of the rotating shaft in the variable-diameter annular limiting groove, and drives the piston rod according to the radius of the variable-diameter annular limiting groove. Change and reciprocate.
  • variable diameter annular limiting groove is an eccentric groove, an irregular shape groove or an elliptical groove.
  • the piston air pump assemblies are disposed in pairs around the air pump body. The number of piston pump assemblies may be 1-3 pairs.
  • a plurality of pairs of the piston air pump assemblies are evenly arranged at equal angular intervals in the circumferential direction of the eccentric.
  • the rolling elements can be bearings or rollers.
  • the outer shape of the air pump body is polygonal or cylindrical.
  • the air pump body is provided with a positioning groove, and the position of the positioning groove corresponds to the position of the piston air pump assembly; the shape of the positioning groove and the piston air pump The shape of the components corresponds.
  • the invention also provides a glass cleaning device, comprising an adsorption unit and a walking unit, wherein the glass cleaning device is adsorbed on the glass surface by the adsorption unit, the adsorption unit comprises a suction cup and a vacuum air pump, and the vacuum air pump provides a vacuum suction force to the suction cup,
  • the vacuum air pump is the above-mentioned vacuum air pump.
  • the transmission mechanism may include a synchronous wheel disposed on the shaft of the driving motor and a timing pulley disposed on the rotating shaft, both The transmission mechanism is further connected by a timing belt; the transmission mechanism may further include a driving gear disposed on the shaft of the driving motor and a driven gear disposed on the rotating shaft, and the two mesh with each other.
  • the present invention provides a vacuum air pump, which can increase the number of piston air pump components as needed, and keep the structure simple and compact while increasing the flow rate of the air pump.
  • the plurality of piston air pump assemblies and the air pump body are disposed on the runner.
  • the connecting method of the variable diameter annular limiting groove and the rolling element including the eccentric groove, the irregular shape groove or the elliptical groove ensures that the reciprocating motion of each piston rod is even and stable, and the plurality of pairs of piston air pump components are installed in the same
  • the height greatly reduces the axial volume of the vacuum pump.
  • DRAWINGS 1 is a schematic perspective view of a conventional vacuum air pump
  • Figure 2 is a cross-sectional view of a conventional vacuum air pump
  • FIG. 3 is a schematic exploded view of a first embodiment of the present invention.
  • Figure 4 is a cross-sectional view showing an embodiment of the present invention.
  • FIG. 5 is a schematic structural view of an assembly according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of an assembly structure according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic structural view of a three-reducing annular limiting slot according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a four-reducing annular limiting slot according to an embodiment of the present invention. detailed description
  • FIG. 3 is a schematic exploded view of a first embodiment of the present invention
  • FIG. 4 is a cross-sectional view of an embodiment of the present invention
  • the present invention provides a vacuum air pump including a driving motor 2, a pump body 1 and a piston air pump assembly 15 disposed on the air pump body 1.
  • the air pump body 1 is provided with a rotating shaft 3,
  • the drive motor 2 transmits power to the rotating shaft 3 through a transmission mechanism, and a rotating wheel is fixed to the rotating shaft 3.
  • a variable diameter annular limiting groove 5 is formed on one surface of the rotating wheel.
  • the variable diameter annular limiting groove 5 can adopt various shapes.
  • the rotating wheel is an eccentric 4, and thus is opened on the eccentric 4
  • the variable diameter annular limiting groove 5 on one side surface is circular.
  • the four piston air pump assemblies 15 are disposed around the air pump body 1 , and the piston rod ends of each of the piston air pump assemblies 15 are provided with rolling elements 6 , and the rolling elements 6 are embedded in the variable diameter annular limiting groove 5 .
  • the rotating shaft 3 drives the eccentric wheel 4 to rotate, and the rolling element 6 rolls in the circumferential direction of the rotating shaft 3 in the variable-diameter annular limiting groove 5 to drive the piston rod 7 to reciprocate.
  • the rolling elements 6 can be bearings or rollers.
  • a plurality of the described piston air pump assemblies 15 are uniformly disposed at equal angular intervals in the circumferential direction of the eccentric wheel 4.
  • the piston air pump assembly 15 may be disposed in pairs around the air pump body 1, and may be provided in a number of 1-3 pairs. That is, the number of the piston air pump assemblies 15 disposed around the air pump body 1 may be an odd number or an even number.
  • the piston air pump assemblies 15 correspondingly disposed around the air pump body 1 are arranged in pairs, BP: set number
  • the piston air pump assembly 15 correspondingly disposed around the air pump body 1 may be unpaired, and the number of BP: is set to an odd number, of course, In this case, an even number can also be set.
  • the outer shape of the air pump body 1 is polygonal or cylindrical, as shown in FIG. In the embodiment shown in Fig. 5, the outer shape of the air pump body 1 is a quadrangular prism shape, and the number of the piston air pump assemblies 15 is two pairs, and BP: four, which are disposed in the four directions of the air pump body 1.
  • the air pump body 1 is provided with a positioning groove 9, the position of the positioning groove 9 and the position of the piston air pump assembly 15.
  • the shape of the positioning groove 9 corresponds to the shape of the piston air pump assembly 15.
  • the power of the drive motor 2 can be transmitted to the rotating shaft 3 by using different transmission mechanisms as needed.
  • the transmission mechanism in this embodiment includes a synchronous wheel 10 disposed on the shaft of the driving motor 2 and a rotating wheel 10 disposed on the rotating shaft 3.
  • the timing pulley 11 is connected between the two by a timing belt 12.
  • the operation of the vacuum air pump of the present invention is as follows: When the vacuum pump starts to operate, the drive motor 2 is operated, and the output shaft of the drive motor 2 passes through the synchronous wheel 10, the timing belt 12, and the timing pulley 11 The rotating shaft 3 is driven to rotate. While the rotating shaft 3 rotates, the rolling element 6 embedded in the variable-diameter annular limiting groove 5, ⁇ : the bearing or the rolling wheel rolls in the circumferential direction of the rotating shaft 3 in the variable-diameter annular limiting groove 5, and drives the piston rod 7 reciprocating motion.
  • the end of the piston rod 7 and the center of the eccentric wheel 4 are rotated in different directions of the eccentric circumference of the eccentric The distance is also different.
  • the end of the piston rod ⁇ is pulled toward the center of rotation of the eccentric wheel 4, and the piston rod 7 is gradually stretched to the longest;
  • the end of the piston rod 7 is pulled away from the center of rotation of the eccentric wheel 4, and the piston rod 7 is gradually contracted to the shortest.
  • the four piston rods 7 disposed around the air pump body 1 are sequentially reciprocated to achieve the purpose of vacuuming.
  • the four piston air pump assemblies 15 disposed around the air pump body 1 are sequentially numbered 1, 2, 3, and 4 in the clockwise direction, and the eccentric wheel 4 is rotated once, and each of the eccentric wheels 4 is connected.
  • the cylinders reciprocate once, and the four cylinders 1, 2, 3, and 4 respectively complete the four states of intake, hold, hold, and exhaust, and complete the vacuuming action.
  • the variable-diameter annular limiting groove 5 serves as both driving and limiting.
  • FIG. 6 is a schematic structural view of an assembly structure according to Embodiment 2 of the present invention. As shown in FIG. 6, the difference between this embodiment and the first embodiment is that the number of piston air pump assemblies 15 in the present embodiment is three pairs, and BP: six piston pump assemblies 15 numbered 1-6 are both The cloth is arranged around the body 1 of the air pump. Due to the increase in the number of the piston air pump assemblies 15, the outer shape of the air pump body 1 is cylindrical for the convenience of arrangement.
  • the transmission mechanism is also different in structure from the first embodiment, and includes a driving gear disposed on the shaft of the driving motor 2 and a driven gear disposed on the rotating shaft 3, both of which are Engage each other.
  • FIG. 7 is a schematic structural diagram of a three-reducing annular limiting slot according to an embodiment of the present invention.
  • the variable diameter annular limiting groove is an irregular shape groove 1000.
  • a plurality of pairs of the piston air pump assembly 15 are disposed around the air pump body, and the end of the piston rod 7 of each piston air pump assembly 15 is provided with a rolling element, and the rolling element is embedded in the irregular shape groove 1000, and the rotating shaft drives the rotating wheel to rotate.
  • the rolling elements roll in the circumferential direction of the rotating shaft in the irregular shape groove 1000, and the piston rod 7 is driven to reciprocate according to the change in the radius of the irregular shape groove 1000.
  • Embodiment 4 Embodiment 4
  • FIG. 8 is a schematic structural diagram of a four-reducing annular limiting slot according to an embodiment of the present invention.
  • the variable diameter annular limiting groove is an elliptical groove 2000.
  • a plurality of pairs of the piston pump assembly 15 are disposed around the air pump body, and the end of the piston rod 7 of each piston air pump assembly 15 is provided with a rolling element, and the rolling element is embedded in the elliptical groove 2000, and the rotating shaft drives the rotating wheel to rotate. The element rolls in the circumferential direction of the rotating shaft in the elliptical groove.
  • the piston rod 7 is driven to reciprocate according to the change in the size of the major axis and the minor axis of the elliptical groove 2000.
  • the symmetrically disposed piston rods 7 are always located at the same diameter of the elliptical groove, such as at the same time on the long axis. Or at the short axis, the two sides of the shaft are balanced by force to achieve better shock absorption.
  • the invention also provides a glass cleaning device, comprising an adsorption unit and a walking unit, wherein the glass cleaning device is adsorbed on the glass surface by the adsorption unit, the adsorption unit comprises a suction cup and a vacuum air pump, and the vacuum air pump provides a vacuum suction force to the suction cup,
  • the vacuum air pump is the vacuum air pump in the above various embodiments.
  • the present invention provides a vacuum air pump, which can increase the number of piston air pump components as needed to achieve the purpose of adjusting the flow rate of the vacuum air pump; while increasing the flow rate of the air pump, in order to keep the structure simple and compact, the multi-pair piston air pump assembly
  • the connection of the variable displacement annular limiting groove and the rolling element including the eccentric groove, the irregular shape groove or the elliptical groove provided on the rotating wheel with the air pump body ensures the uniform and stable reciprocating motion of each piston rod, and It ensures that multiple pairs of piston air pump components are installed at the same height, which greatly reduces the axial height of the vacuum pump, making the structure more compact and space saving.
  • the glass cleaning device of the vacuum pump described above since the flow rate of the vacuum air pump is large, even if the suction cup is lifted up by the particles on the surface of the glass, the degree of vacuum is not quickly lost, and the phenomenon that the body of the glass-wiping device falls from the glass surface is effectively prevented. happened.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

一种真空气泵及擦玻璃装置，气泵包括驱动电机（2）、气泵本体（1）和活塞气泵组件（15），气泵本体内设有转轴（3），驱动电机（2）通过传动机构将动力传递给转轴（3），转轴（3）上固定有转轮（4），转轮（4）上设有变径环形限位槽（5）；至少两个活塞气泵组件（15）围设在气泵本体（1）的四周，每一组件的活塞杆（7）端部均设有滚动元件（6），滚动元件（6）嵌设在环形限位槽（5）中，转轴（3）带动转轮（4）转动，滚动元件（6）在变径环形限位槽（5）内沿转轴（3）的圆周方向滚动，带动活塞杆（7）根据变径环形限位槽（5）的半径大小变化而往复运动。该真空气泵可以根据需要改变活塞气泵组件的数量，增加气泵流量结构简单紧凑，活塞杆的往复运动均匀平稳，且多对活塞气泵组件安装在同一高度，缩短了真空气泵的轴向体积。

Description

真空气泵及擦玻璃装置 技术领域
本发明涉及一种真空气泵及擦玻璃装置， 属于机械制造技术领域。 背景技术
现有的擦玻璃机器人是通过机体底部的吸盘吸附在玻璃上从而自动清洁玻璃的。 而吸盘内的真空度是依靠真空气泵不断地抽气而产生的。 现有真空气泵基本都是通过 电机带动两个对称安装的活塞往复运动完成抽真空动作的。 图 1为现有真空气泵的立 体结构示意图； 图 2为现有真空气泵的剖面图。 如图 1并结合图 2所示， 真空气泵包 含两个气缸 A和 B， 每个气缸 A或 B分别包括一个进气孔 100A、 100B和一个出气孔 200A、 200B, 其中进气孔 100A、 100B连接吸盘， 配重块 300通过偏心轴 400径向 重叠安装在电机轴 500上， 其中轴承内圈与偏心轴 400固定， 活塞杆 600A和 600B与 轴承外圈固定， 两根活塞杆 600A和 600B相对设置， 因此当电机 700转动时， 两根活 塞杆 600A和 600B在轴承 300的带动下会进行相对伸縮运动， 使两个气缸 A和 B分 别进行抽气和排气， 从而对吸盘不间断进行抽气， 以保持吸盘内的真空度。
上述的真空气泵仅采用一对活塞进行抽真空， 因而气泵的流量较小， 如果吸盘被 玻璃表面上的颗粒物顶起， 会很快失去真空度， 从而使机体从玻璃表面跌落下来。 如 果增大气泵流量， 即使吸盘漏气也可以立即恢复真空度， 从而避免机体跌落。 通过增 加气缸的数量可以增加气泵流量， 但按照目前的方式， 只能将活塞杆在电机轴上叠加， 这样会使得真空气泵轴向长度很大， 结构冗赘， 结构不紧凑， 使擦玻璃机器人的外形 体积受到很大影响。 发明内容
本发明所要解决的技术问题在于针对现有技术的不足， 提供一种真空气泵及擦玻 璃装置， 该真空气泵可以根据需要增加活塞气泵组件的数量， 在增加气泵流量的同时， 保持结构简单紧凑。 采用上述真空气泵的擦玻璃装置， 由于真空气泵的流量大， 即使 吸盘被玻璃表面上的颗粒物顶起， 也不会很快失去真空度， 有效防止擦玻璃装置的机 体从玻璃表面跌落下来的现象的发生。
本发明的所要解决的技术问题是通过如下技术方案实现的： 一种真空气泵， 包括驱动电机、 气泵本体和设置在气泵本体上的活塞气泵组件， 所述气泵本体内设有转轴， 所述驱动电机通过传动机构将动力传递给转轴， 转轴上固 定有转轮， 转轮的一侧表面开设变径环形限位槽； 至少两个所述活塞气泵组件围设在 气泵本体的四周， 每个活塞气泵组件的活塞杆端部均设有滚动元件， 所述滚动元件嵌 设在变径环形限位槽中， 转轴带动转轮转动， 所述滚动元件在变径环形限位槽内沿转 轴的圆周方向滚动， 带动活塞杆根据变径环形限位槽的半径大小变化而往复运动。
根据需要， 所述变径环形限位槽的形状为偏心槽、 不规则形状槽或椭圆槽。 所述活塞气泵组件在所述气泵本体的四周成对设置。 所述活塞气泵组件的设置数 量可以为 1-3对。
为了根据需要调整真空气泵的气泵流量， 同时保持其结构简单紧凑， 多对所述的 活塞气泵组件在所述偏心轮的圆周方向等角度间隔均匀设置。
为了减少磨损， 所述的滚动元件可以为轴承或滚轮。
为了方便布置， 所述的气泵本体的外部形状为多棱柱形或圆柱形。
为了使活塞气泵组件与气泵本体稳定连接， 所述的气泵本体上设有定位凹槽， 该 定位凹槽的位置与所述活塞气泵组件的设置位置相对应； 该定位凹槽的形状与活塞气 泵组件的外形相对应。
本发明还提供一种擦玻璃装置， 包含吸附单元和行走单元， 擦玻璃装置通过吸附 单元吸附于玻璃表面， 所述吸附单元包含吸盘和真空气泵， 真空气泵为吸盘提供真空 抽吸力， 所述真空气泵为上述的真空气泵。
根据需要， 可以采用不同的传动机构将驱动电机的动力传递给转轴， 比如： 所述 的传动机构可以包括设置在驱动电机轴上的同步轮和设置在所述转轴上的同步带轮， 两者之间通过同步带相连； 所述的传动机构还可以包括设置在驱动电机轴上的主动齿 轮和设置在所述转轴上的从动齿轮， 两者相互啮合。
综上所述， 本发明提供一种真空气泵， 可以根据需要增加活塞气泵组件的数量， 在增加气泵流量的同时， 保持结构简单紧凑， 多个活塞气泵组件与气泵本体通过设置 在转轮上的包括偏心槽、 不规则形状槽或椭圆槽在内的变径环形限位槽和滚动元件的 连接方式， 既保证了各个活塞杆的往复运动均匀平稳， 又保证了多对活塞气泵组件安 装在同一高度， 大大縮短了真空气泵的轴向体积。
下面结合附图和具体实施例， 对本发明的技术方案进行详细地说明。 附图说明 图 1为现有真空气泵的立体结构示意图；
图 2为现有真空气泵的剖面图；
图 3为本发明实施例一分解结构示意图；
图 4为本发明实施例一剖面图；
图 5为本发明实施例一组装结构示意图；
图 6为本发明实施例二组装结构示意图；
图 7为本发明实施例三变径环形限位槽的结构示意图；
图 8为本发明实施例四变径环形限位槽的结构示意图。 具体实施方式
实施例一
图 3为本发明实施例一分解结构示意图； 图 4为本发明实施例一剖面图； 图 5为 本发明实施例一组装结构示意图。 如图 3至图 5所示， 本发明提供一种真空气泵， 包 括驱动电机 2、 气泵本体 1和设置在气泵本体 1上的活塞气泵组件 15， 所述气泵本体 1内设有转轴 3， 所述驱动电机 2通过传动机构将动力传递给转轴 3， 转轴 3上固定有 转轮。 转轮的一侧表面开设有变径环形限位槽 5， 该变径环形限位槽 5可以采用多种 形状， 在本实施例中， 该转轮为偏心轮 4， 因此开设在偏心轮 4的一侧表面上的变径 环形限位槽 5为圆形。 四个活塞气泵组件 15围设在气泵本体 1的四周， 每个活塞气泵 组件 15的活塞杆 Ί端部均设有滚动元件 6， 所述滚动元件 6嵌设在变径环形限位槽 5 中， 转轴 3带动偏心轮 4转动， 所述滚动元件 6在变径环形限位槽 5内沿转轴 3的圆 周方向滚动， 带动活塞杆 7往复运动。 为了减少磨损， 所述的滚动元件 6可以为轴承 或滚轮。
为了根据需要调整真空气泵的气泵流量， 同时保持其结构简单紧凑， 多个所述的 活塞气泵组件 15在所述偏心轮 4的圆周方向等角度间隔均匀设置。所述活塞气泵组件 15在所述气泵本体 1的四周可以成对设置， 设置数量可以为 1-3对。 也就是说， 设置 在气泵本体 1四周的活塞气泵组件 15的数量既可以是奇数个也可以是偶数个。通常当 变径环形限位凹槽 5的形状为规则形状时， 为了使得电机的输出轴上受力均衡， 对应 设置在气泵本体 1四周的活塞气泵组件 15为成对设置的， BP : 设置数量为偶数个； 当 变径环形限位凹槽 15的形状为不规则形状时，对应设置在气泵本体 1四周的活塞气泵 组件 15则可以不成对设置， BP : 设置数量为奇数个， 当然， 在这种情况下也可以设置 偶数个。 为了方便布置， 所述的气泵本体 1 的外部形状为多棱柱形或圆柱形， 在图 3 至图 5所示的实施例中， 气泵本体 1的外部形状为四棱柱形， 活塞气泵组件 15的设置 数量为 2对， BP : 四个， 正好设置在气泵本体 1的四个方向上。
如图 3所示， 为了使活塞气泵组件 15与气泵本体 1稳定连接， 所述的气泵本体 1 上设有定位凹槽 9， 该定位凹槽 9的位置与所述活塞气泵组件 15的设置位置相对应； 该定位凹槽 9的形状与活塞气泵组件 15的外形相对应。根据需要， 可以采用不同的传 动机构将驱动电机 2的动力传递给转轴 3， 比如： 本实施例中的传动机构包括设置在 驱动电机 2轴上的同步轮 10和设置在所述转轴 3上的同步带轮 11， 两者之间通过同 步带 12相连。
如图 3至图 5所示， 本发明真空气泵的工作过程是这样的： 当真空泵开始工作时， 驱动电机 2运转， 驱动电机 2的输出轴通过同步轮 10、 同步带 12和同步带轮 11带动 转轴 3转动。 在转轴 3转动的同时， 嵌设在变径环形限位槽 5中的滚动元件 6， 艮卩： 轴承或滚动轮在变径环形限位槽 5内沿转轴 3的圆周方向滚动， 带动活塞杆 7往复运 动。 具体来说， 随着滚动元件 6在变径环形限位槽 5内沿转轴 3的圆周方向的滚动， 在偏心轮偏心圆周的不同方向上，活塞杆 7的端部与偏心轮 4旋转中心的距离也不同， 在变径环形限位槽 5外壁内侧的推动作用下， 将活塞杆 Ί的端部朝靠近偏心轮 4旋转 中心的方向拉动， 逐渐使活塞杆 7拉伸到最长； 在变径环形限位槽 5内壁外侧的推动 作用下， 将活塞杆 7的端部朝远离偏心轮 4旋转中心的方向拉动， 逐渐使活塞杆 7收 縮到最短。 设置在气泵本体 1四周的四个活塞杆 7分别依次往复运动， 实现抽真空的 目的。如图 5所示， 将设置在气泵本体 1四周的四个活塞气泵组件 15按照顺时针方向 依次编号为 1、 2、 3和 4， 偏心轮 4转动一圈， 与偏心轮 4连接的每个气缸分别往复 运动一次， 1、 2、 3、 4四个气缸分别依次完成进气、 保持、 保持、 出气四个状态， 完 成抽真空动作。在上述的运动过程中， 变径环形限位槽 5起到了驱动和限位双重作用。 实施例二
图 6为本发明实施例二组装结构示意图。 如图 6所示， 本实施例与实施例一的不 同之处在于， 本实施例中活塞气泵组件 15的设置数量为 3对， BP : 编号依次为 1-6的 6个活塞气泵组件 15均布围设在气泵本体 1的四周。 由于活塞气泵组件 15的数量的 增加， 为了方便布置， 气泵本体 1的外部形状为圆柱形。
另外， 在本实施例中， 所述传动机构的结构形式也和实施例一有所不同， 包括设 置在驱动电机 2轴上的主动齿轮和设置在所述转轴 3上的从动齿轮， 两者相互啮合。
本实施例中的其他技术特征与实施例一基本相同， 具体内容参见实施例一中的描 述， 在此不再赘述。 实施例三
图 7为本发明实施例三变径环形限位槽的结构示意图。 如图 7所示， 在本实施例 中， 变径环形限位槽为不规则形状槽 1000。 多对所述活塞气泵组件 15 围设在气泵本 体四周， 每个活塞气泵组件 15的活塞杆 7端部均设有滚动元件， 滚动元件嵌设在不规 则形状槽 1000中， 转轴带动转轮转动， 滚动元件在不规则形状槽 1000内沿转轴的圆 周方向滚动， 带动活塞杆 7根据不规则形状槽 1000的半径大小变化而实现往复运动。 实施例四
图 8为本发明实施例四变径环形限位槽的结构示意图。 如图 8所示， 在本实施例 中， 变径环形限位槽为椭圆槽 2000。 多对所述活塞气泵组件 15围设在气泵本体四周， 每个活塞气泵组件 15的活塞杆 7端部均设有滚动元件， 滚动元件嵌设在椭圆槽 2000 中，转轴带动转轮转动，滚动元件在椭圆槽内沿转轴的圆周方向滚动，由于椭圆槽 2000 具有长轴和短轴，带动活塞杆 7根据椭圆槽 2000的长轴和短轴的大小变化而实现往复 运动。 特别的， 当椭圆槽 2000相对于转轴对称且活塞气泵组件 15成对对称设置在椭 圆槽 2000的两侧时，对称设置的活塞杆 7总是同时位于椭圆槽的等径处如同时位于长 轴或短轴处， 使得转轴两侧受力平衡， 取得更好的减震效果。 本发明还提供一种擦玻璃装置， 包含吸附单元和行走单元， 擦玻璃装置通过吸附 单元吸附于玻璃表面， 所述吸附单元包含吸盘和真空气泵， 真空气泵为吸盘提供真空 抽吸力， 所述真空气泵为上述多个实施例中的真空气泵。 综上所述， 本发明提供一种真空气泵， 可以根据需要增加活塞气泵组件的数量， 以达到调节真空气泵流量的目的； 在增加气泵流量的同时， 为了保持结构简单紧凑， 多对活塞气泵组件与气泵本体通过设置在转轮上的包括偏心槽、 不规则形状槽或椭圆 槽在内的变径环形限位槽和滚动元件的连接方式， 既保证了各个活塞杆的往复运动均 匀平稳， 又保证了多对活塞气泵组件安装在同一高度， 大大降低真空气泵的轴向高度， 使得结构更为紧凑， 节省空间。 采用上述真空气泵的擦玻璃装置， 由于真空气泵的流 量大， 即使吸盘被玻璃表面上的颗粒物顶起， 也不会很快失去真空度， 有效防止擦玻 璃装置的机体从玻璃表面跌落下来的现象的发生。

Claims

权利要求书
1、 一种真空气泵， 包括驱动电机 （2)、 气泵本体 （1) 和设置在气泵本体上的活 塞气泵组件 （15)， 其特征在于， 所述气泵本体 （1) 内设有转轴 （3)， 所述驱动电机
(2) 通过传动机构将动力传递给转轴 （3)， 转轴 （3) 上固定有转轮， 转轮的一侧表 面开设变径环形限位槽 （5); 至少两个所述活塞气泵组件 （15) 围设在气泵本体 （1) 的四周， 每个活塞气泵组件 （15) 的活塞杆 （7) 端部均设有滚动元件 （6)， 所述滚动 元件（6)嵌设在变径环形限位槽（5)中， 转轴（3)带动转轮转动， 所述滚动元件（6) 在变径环形限位槽 （5) 内沿转轴 （3) 的圆周方向滚动， 带动活塞杆 （7) 根据变径环 形限位槽的半径大小变化而往复运动。
2、 如权利要求 1所述的真空气泵， 其特征在于， 所述变径环形限位槽 （5) 的形 状为偏心槽、 不规则形状槽或椭圆槽。
3、 如权利要求 1所述的真空气泵， 其特征在于， 所述活塞气泵组件 （15) 在所述 气泵本体 （1) 的四周成对设置。
4、 如权利要求 3所述的真空气泵， 其特征在于， 所述的活塞气泵组件 （15)在所 述转轮的圆周方向等角度间隔均匀设置。
5、 如权利要求 3所述的真空气泵， 其特征在于， 所述活塞气泵组件 （15) 的设置 数量为 1-3对。
6、 如权利要求 5所述的真空气泵， 其特征在于， 所述的气泵本体 （1) 的外部形 状为多棱柱形或圆柱形。
7、 如权利要求 4所述的真空气泵， 其特征在于， 所述的气泵本体 （1) 上设有定 位凹槽 （9)， 该定位凹槽 （9) 的位置与所述活塞气泵组件 （15) 的设置位置相对应； 该定位凹槽 （9) 的形状与活塞气泵组件 （15) 的外形相对应。
8、 如权利要求 1所述的真空气泵， 其特征在于， 所述的传动机构包括设置在驱动 电机轴上的同步轮 （10) 和设置在所述转轴 （3) 上的同步带轮 （11)， 两者之间通过 同步带 （12) 相连。
9、 如权利要求 1所述的真空气泵， 其特征在于， 所述的传动机构包括设置在驱动 电机轴上的主动齿轮和设置在所述转轴上的从动齿轮， 两者相互啮合。
10、 如权利要求 1所述的真空气泵， 其特征在于， 所述的滚动元件 （6) 为轴承或 滚轮。
11、 一种擦玻璃装置， 包含吸附单元和行走单元， 擦玻璃装置通过吸附单元吸附 于玻璃表面， 所述吸附单元包含吸盘和真空气泵， 真空气泵为吸盘提供真空抽吸力， 其特征在于， 所述真空气泵为权利要求 1-10任一项所述的真空气泵。
PCT/CN2014/072978 2013-03-06 2014-03-06 真空气泵及擦玻璃装置 WO2014135101A1 (zh)

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