EP2966300A1 - Pompe à air aspirante, et appareil essuie-vitre - Google Patents

Pompe à air aspirante, et appareil essuie-vitre Download PDF

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Publication number
EP2966300A1
EP2966300A1 EP14760143.9A EP14760143A EP2966300A1 EP 2966300 A1 EP2966300 A1 EP 2966300A1 EP 14760143 A EP14760143 A EP 14760143A EP 2966300 A1 EP2966300 A1 EP 2966300A1
Authority
EP
European Patent Office
Prior art keywords
air pump
piston
vacuum
rotating shaft
groove
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14760143.9A
Other languages
German (de)
English (en)
Inventor
Yongbing FENG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ecovacs Robotics Suzhou Co Ltd
Original Assignee
Ecovacs Robotics Suzhou Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ecovacs Robotics Suzhou Co Ltd filed Critical Ecovacs Robotics Suzhou Co Ltd
Publication of EP2966300A1 publication Critical patent/EP2966300A1/fr
Withdrawn legal-status Critical Current

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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 present invention relates to a vacuum air pump and a glass-wiping device, belonging to the technical field of mechanical manufacturing.
  • a glass-wiping robot in the prior art automatically cleans a glass by allowing a suction cup on the bottom of the machine body to be adsorbed onto the glass.
  • the vacuum degree in the suction cup is generated by the vacuum air pump constantly performing pumping.
  • the vacuum air pump in the prior art generally accomplishes the vacuum-pumping motion such that a motor drives two symmetrically installed pistons to perform reciprocating movement.
  • Fig. 1 is a structural perspective view of the vacuum air pump in the prior art; and
  • Fig. 2 is a sectional view of the vacuum air pump in the prior art. As shown in Fig. 1 in combination with Fig.
  • the vacuum air pump includes two cylinders A and B each having one air inlet hole 100A or 100B and one air outlet hole 200A or 200B, wherein the air inlet holes 100A and 100B are connected to the suction cup, and a balancing weight 300 is installed on the motor shaft 500 by overlapping with an eccentric shaft 400 radially, and wherein a bearing cone is fixed to the eccentric shaft 400, a bearing cup is fixed to the piston rods 600A and 600B, and the two piston rods 600A and 600B are disposed oppositely, and thus when the motor 700 rotates, the two piston rods 600A and 600B will make an expand and contract movement oppositely by the driving of the bearing 300 so that the two air cylinders A and B perform air inhaling and air exhausting respectively to pump constantly in the suction cup to maintain the vacuum degree therein.
  • the above vacuum air pump uses only a pair of pistons for vacuum pumping and thus the air flow of the air pump is small, and if the suction cup is lifted by particles on the glass surface, it will lose the vacuum degree soon, thereby making the machine body fall off the glass surface. If the air flow of the air pump increases, the suction cup may recovery the vacuum degree immediately even if air leakage occurs, thereby preventing the machine body from falling off.
  • the air flow of the air pump may be increased by increasing the number of the air pumps, and according to the current way, it can be achieved only by stacking the piston rods on the motor shaft. As a result, the vacuum air pump will have a larger shaft length, and thus has a complicated and non-compact structure, which will significantly affect the appearance and volume of the glass-wiping robot.
  • the present invention provides a vacuum air pump and a glass-wiping device, in which the vacuum air pump may increase the number of piston air pump members as needed and may keep the structure simple and compact while increasing the air flow rate of the air pump. Even if the suction cup is lifted by particles on the glass surface, it will not lose the vacuum degree soon for the reason that the air flow rate of the vacuum air pump is so large that the glass-wiping device using the above-mentioned vacuum air pump effectively prevents the phenomenon that the machine body of the glass-wiping device falls off the glass surface.
  • a vacuum air pump comprises a driving motor, an air pump body and a piston air pump member provided on the air pump body, a rotating shaft is provided in the air pump body, the driving motor transmits power to the rotating shaft through a transmission mechanism, a rotating wheel is fixed on the rotating shaft, a diameter-variable annular limitation groove is formed in one side surface of the rotating wheel; at least two piston air pump members are provided around the air pump body, a piston rod of each of the piston air pump members is provided with a rolling element at the end thereof, the rolling element is embedded in the diameter-variable annular limitation groove, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls in the circumferential direction of the rotating shaft within the diameter-variable annular limitation groove, thereby driving the piston rod to perform a reciprocating movement depending on the size change in radius of the diameter-variable annular limitation groove.
  • the diameter-variable annular limitation groove is an eccentric groove, an irregularly-shaped groove or an elliptical groove.
  • the piston air pump members are provided around the air pump body in pairs.
  • the pair number of the piston air pump members may be one to three.
  • a plurality of pairs of the piston air pump members are uniformly provided at regular angle and interval in the circumferential direction of the eccentric wheel.
  • the rolling element may be a bearing or a roller.
  • the outer shape of the air pump body is a polygon prism or a cylinder.
  • the air pump body is provided with positioning grooves, the positions of which correspond to the positions where the piston air pump members are provided and the shapes of which correspond to the outline shapes of the piston air pump members.
  • the present invention also provides a glass-wiping device comprising a suction unit and a walking unit, the glass-wiping device sucks onto the glass surface through the suction unit, the suction unit includes a suction cup and a vacuum air pump, and the vacuum air pump supplies a vacuum suction force for the suction cup, wherein the vacuum air pump is the above-mentioned vacuum air pump.
  • the transmission mechanism may comprise a synchronous wheel provided on the shaft of the driving motor and a synchronous belt wheel provided on the rotating shaft, wherein the synchronous wheel and the synchronous belt wheel are connected to each other via a synchronous belt; and the transmission mechanism may also comprise a driving gear provided on the shaft of the driving motor and a driven gear provided on the rotating shaft, wherein the driving gear and the driven gear are engaged with each other.
  • the present invention provides a vacuum air pump in which the number of the piston air pump members may be increased as needed, and a plurality of the piston air pump members are connected to the air pump body through the diameter-variable annular limitation groove including the eccentric groove, the irregularly-shaped groove and the elliptical groove and the rolling element for keeping the structure simple and compact while increasing the air flow rate of the air pump, which both ensures that the piston rods each perform a reciprocating movement uniformly and stably and ensures that the plurality of pairs of the piston air pump members are installed at the same height, significantly reducing the volume in the shaft direction of the vacuum air pump,
  • Fig. 3 is an exploded structural view of the first embodiment of the present invention
  • Fig. 4 is a sectional view of the first embodiment of the present invention
  • Fig. 5 is a structural view of an assembly of the first embodiment of the present invention.
  • the present invention provides a vacuum air pump comprising a driving motor 2, an air pump body 1 and a piston air pump member 15 provided on the air pump body 1, wherein a rotating shaft 3 is provided in the air pump body 1, the driving motor 2 transmits power to the rotating shaft 3 through a transmission mechanism, and a rotating wheel is fixed on the rotating shaft 3.
  • a diameter-variable annular limitation groove 5 is formed on one side surface of the rotating wheel and may use various shapes, and in the present embodiment, the rotating wheel is an eccentric wheel 4 and thus the diameter-variable annular limitation groove 5 formed on one side surface of the eccentric wheel 4 is round.
  • Four piston air pump members 15 are provided around the air pump body 1, the piston rod 7 of each of the piston air pump members 15 is provided with a rolling element 6 at the end thereof, the rolling element 6 is embedded in the diameter-variable annular limitation 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 within the diameter-variable annular limitation groove 5, thereby driving the piston rod 7 to perform a reciprocating movement.
  • the rolling element 6 may be a bearing or the roller.
  • a plurality of the piston air pump members 15 are uniformly provided in the circumference direction of the eccentric wheel 4 at a regular angle and interval.
  • the piston air pump members 15 may be provided in pairs around the air pump body 1, and the pair number may be one to three. That is, the number of the piston air pump members 15 provided around the air pump body 1 is either an odd number or an even number.
  • the piston air pump members 15 are provided in pairs (i.e., the number of the piston air pump members 15 is an even number) around the air pump body 1 so that the strain applied to the output shaft of the motor is uniform; and when the diameter-variable annular limitation grooves 5 have an irregular shape, the piston air pump members 15 may be not provided in pairs (i.e., the number of the piston air pump members 15 is an odd number) around the air pump body 1. In this case, it will be appreciated that they may be also provided in pairs.
  • the outer shape of the air pump body 1 is a polygon prism or a cylinder. In the embodiments shown in Figs. 3 to 5 , the outer shape of the air pump body 1 is a quadrangular prism. Two pairs of piston air pump members 15 are provided (i.e., the number of the piston air pump members 15 is four) in the four directions of the air pump body 1.
  • the air pump body 1 is provided with positioning grooves 9, the positions of which correspond to the positions where the piston air pump members 15 are provided and the shapes of which correspond to the outer shapes of the piston air pump members 15.
  • various transmission mechanisms may be used to transmit power from the driving motor 2 to the rotating shaft 3.
  • the transmission mechanism in the present embodiment comprises a synchronous wheel 10 provided on the shaft of the driving motor 2 and a synchronous belt wheel 11 provided on the rotating shaft 3, wherein the wheels 10 and 11 are connected to each other via a synchronous belt 12.
  • the operation process of the vacuum air pump of the present invention is as follows: when the vacuum air pump starts to operate, the driving motor 2 rotates, and its output shaft drives the rotating shaft 3 to rotate via the synchronous wheel 10, the synchronous belt 12 and the synchronous belt wheel 11. While the rotating shaft 3 rotates, the rolling element 6 (i.e., bearing or roller) embedded in the diameter-variable annular limitation groove 5 rolls in the circumferential direction of the rotating shaft 3 within the diameter-variable annular limitation groove 5, thereby driving the piston rod 7 to perform a reciprocating movement.
  • the rolling element 6 i.e., bearing or roller
  • the distance from the end of the piston rod 7 to the rotating center of the eccentric wheel 4 varies in different directions of the eccentric circumference of the eccentric wheel.
  • the end of the piston rod 7 is pulled towards the rotating center of the eccentric wheel 4 so that the piston rod 7 is gradually extended to the maximum length; and with the propulsive force from the outside of the inner wall of the diameter-variable annular limitation groove 5, the end of the piston rod 7 is pulled away from the rotating center of the eccentric wheel 4 so that the piston rod 7 is gradually retracted to the minimum length.
  • piston rods 7 provided around the air pump body 1 perform the reciprocating movement in turns, thereby accomplishing vacuum pumping.
  • four piston air pump members 15 provided around the air pump body 1 are indicated by the numbers 1, 2, 3 and 4 respectively in the clockwise direction.
  • the eccentric wheel 4 rotates once, each of the cylinders connected to the eccentric wheel 4 performs the reciprocating movement for one time, and the four cylinders indicated by the numbers 1, 2, 3 and 4 each accomplish four states of air in, hold, hold and air out sequentially, hereby completing the vacuum pumping.
  • the diameter-variable annular limitation grooves 5 provide both driving and limiting functions.
  • Fig. 6 is a structural view of the assembly of the second embodiment of the present invention.
  • the difference of the present embodiment from the first embodiment is: in the present embodiment, the piston air pump members 15 are provided in three pairs, i.e., six piston air pump members 15 indicated by the numbers 1 to 6 are provided uniformly around the air pump body 1. For the reason that the number of the piston air pump members 15 becomes greater, the outer shape of the air pump body 1 is a cylinder, for ease of arrangement.
  • the transmission mechanism in the present embodiment has a different structure from that of the first embodiment, and comprises a driving gear provided on the shaft of the driving motor 2 and a driven gear provided on the rotating shaft 3, wherein the driving gear and the driven gear are engaged with each other.
  • Fig. 7 is a structural view of a diameter-variable annular limitation groove of the third embodiment of the present invention.
  • the diameter-variable annular limitation groove in the present embodiment is an irregularly-shaped groove 1000.
  • the piston air pump members 15 are provided around the air pump body in plural pairs, the piston rod 7 of each of the piston air pump members 15 is provided with a rolling element at the end, the rolling element is embedded in the irregularly-shaped groove 1000, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls within the irregularly-shaped groove 1000 in the circumferential direction of the rotating shaft to thereby drive the piston rod 7 to make a reciprocating movement depending on the size change in radius of the irregularly-shaped groove 1000.
  • Fig. 8 is a structural view of a diameter-variable annular limitation groove of the fourth embodiment according to the present invention.
  • the diameter-variable annular limitation groove in the present embodiment is an elliptical groove 2000.
  • the piston air pump members 15 are provided around the air pump body in plural pairs, the piston rod 7 of each of the piston air pump members 15 is provided with a rolling element at the end, the rolling element is embedded in the elliptical groove 2000, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls within the elliptical groove in the circumferential direction of the rotating shaft, due to that the elliptical groove 2000 has long and short axes, to thereby drive the piston rod 7 to make a reciprocating movement depending on the size change in long and short axes of the elliptical groove 2000.
  • the piston rods 7 provided symmetrically are always on the equal-diameters (such as, the long axis or the short axis) of the elliptical groove simultaneously such that two sides of the rotating shaft are stressed equally to thereby achieve a better shock-absorbing effect.
  • the present invention also provides a glass-wiping device comprising a suction unit and a walking unit, the glass-wiping device sucks onto the glass surface through the suction unit, the suction unit includes a suction cup and a vacuum air pump, and the vacuum air pump supplies a vacuum suction force for the suction cup, wherein the vacuum air pump is any one of the vacuum air pumps present in the above-mentioned embodiments.
  • the present invention provides a vacuum air pump in which the number of the piston air pump members may be increased as needed so as to adjust the air flow rate of the vacuum air pump; and a plurality of pairs of the piston air pump members are connected to the air pump body through the diameter-variable annular limitation groove including the eccentric groove, the irregularly-shaped groove and the elliptical groove and the rolling element for keeping the structure simple and compact while increasing the air flow rate of the air pump, which both ensures that the piston rods each make a reciprocating movement uniformly and stably and ensures that the plurality of pairs of the piston air pump members are installed at the same height, significantly reduces the height in the shaft direction of the vacuum air pump, makes the structure more compact and thus saves space.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP14760143.9A 2013-03-06 2014-03-06 Pompe à air aspirante, et appareil essuie-vitre Withdrawn EP2966300A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201310072063.3A CN104033357B (zh) 2013-03-06 2013-03-06 真空气泵及擦玻璃装置
PCT/CN2014/072978 WO2014135101A1 (fr) 2013-03-06 2014-03-06 Pompe à air aspirante, et appareil essuie-vitre

Publications (1)

Publication Number Publication Date
EP2966300A1 true EP2966300A1 (fr) 2016-01-13

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EP14760143.9A Withdrawn EP2966300A1 (fr) 2013-03-06 2014-03-06 Pompe à air aspirante, et appareil essuie-vitre

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US (1) US20160106278A1 (fr)
EP (1) EP2966300A1 (fr)
CN (1) CN104033357B (fr)
WO (1) WO2014135101A1 (fr)

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CN105089964B (zh) * 2015-08-28 2017-09-12 黑龙江景宏石油设备制造有限公司 油田钻机用径向柱塞泥浆泵
CN105411468A (zh) * 2015-12-10 2016-03-23 王宏强 智能攀爬清洁机器人
CN114652472B (zh) * 2022-03-18 2024-07-05 深圳瑞科时尚电子有限公司 用于口腔护理装置的多活塞驱动组件及口腔护理装置
CN117185675B (zh) * 2023-09-12 2024-04-26 浙江富新太阳能有限公司 一种用于压制汽车透镜光学玻璃预制棒

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Also Published As

Publication number Publication date
CN104033357A (zh) 2014-09-10
WO2014135101A1 (fr) 2014-09-12
CN104033357B (zh) 2017-05-10
US20160106278A1 (en) 2016-04-21

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