US20160106278A1 - Vacuum Air Pump and Glass-Wiping Apparatus - Google Patents
Vacuum Air Pump and Glass-Wiping Apparatus Download PDFInfo
- Publication number
- US20160106278A1 US20160106278A1 US14/772,938 US201414772938A US2016106278A1 US 20160106278 A1 US20160106278 A1 US 20160106278A1 US 201414772938 A US201414772938 A US 201414772938A US 2016106278 A1 US2016106278 A1 US 2016106278A1
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- United States
- 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.)
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Classifications
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- 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
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- 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
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- 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
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- 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.
- 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 100 A or 100 B and one air outlet hole 200 A or 200 B, wherein the air inlet holes 100 A and 100 B 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 600 A and 600 B, and the two piston rods 600 A and 600 B are disposed oppositely, and thus when the motor 700 rotates, the two piston rods 600 A and 600 B 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. 1 is a structural perspective view of a vacuum air pump in the prior art
- FIG. 2 is a sectional view of the vacuum air pump in the prior art
- 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.
- FIG. 6 is a structural view of an assembly of the second embodiment of the present invention.
- FIG. 7 is a structural view of a diameter-variable annular limitation groove of the third embodiment of the present invention.
- FIG. 8 is a structural view of a diameter-variable annular limitation groove of the fourth embodiment of the present invention.
- 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 propulsive force from the inside of the outer wall of the diameter-variable annular limitation groove 5 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.
- 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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- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A vacuum air pump and a glass-wiping device are provided. The air pump comprises a driving motor (2), an air pump body (1) and a piston air pump member (15), a rotating shaft (3) is provided in the air pump body, the driving motor transmits power to the rotating shaft via a transmission mechanism, a rotating wheel is fixed on the rotating shaft, a diameter-variable annular limitation groove (5) is formed in the rotating wheel; at least two piston air pump members are provided around the air pump body, a piston rod of each of the members is provided with a rolling element (6) at the end thereof, the rolling element is embedded in the annular limitation groove, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls within the diameter-variable annular limitation groove 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 diameter-variable annular limitation groove. The present invention may change the number of the piston air pump members so as to keep the structure simple and compact while increasing the air flow rate of the air pump, the piston rod performs a reciprocating movement uniformly and stably, and a plurality of pairs of the piston air pump members are installed at the same height, thereby reducing the volume in the shaft direction of the vacuum air pump.
Description
- 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; andFIG. 2 is a sectional view of the vacuum air pump in the prior art. As shown inFIG. 1 in combination withFIG. 2 , the vacuum air pump includes two cylinders A and B each having oneair inlet hole air outlet hole air inlet holes weight 300 is installed on themotor shaft 500 by overlapping with aneccentric shaft 400 radially, and wherein a bearing cone is fixed to theeccentric shaft 400, a bearing cup is fixed to thepiston rods piston rods motor 700 rotates, the twopiston rods 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.
- With view of the above, 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.
- The technical problem is solved by the following technical solutions of the present invention.
- 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.
- As needed, 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.
- In order to adjust the air flow rate of the vacuum air pump as needed while keeping the simple and compact structure of the vacuum air pump, 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.
- For reducing wear, the rolling element may be a bearing or a roller.
- For ease of arrangement, the outer shape of the air pump body is a polygon prism or a cylinder.
- For the stable connection of the piston air pump members with the air pump body, 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.
- As needed, various transmission mechanisms may be used to transmit the power from the driving motor to the rotating shaft, for example, 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.
- From the above, 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,
- The technical solutions of the present invention will be described in detail with reference to the following accomplishing drawings and specific embodiments.
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FIG. 1 is a structural perspective view of a vacuum air pump in the prior art; -
FIG. 2 is a sectional view of the vacuum air pump in the prior art; -
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; -
FIG. 6 is a structural view of an assembly of the second embodiment of the present invention; -
FIG. 7 is a structural view of a diameter-variable annular limitation groove of the third embodiment of the present invention; and -
FIG. 8 is a structural view of a diameter-variable annular limitation groove of the fourth embodiment of the present invention. -
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; andFIG. 5 is a structural view of an assembly of the first embodiment of the present invention. As shown inFIGS. 3 to 5 , the present invention provides a vacuum air pump comprising a drivingmotor 2, anair pump body 1 and a pistonair pump member 15 provided on theair pump body 1, wherein a rotatingshaft 3 is provided in theair pump body 1, the drivingmotor 2 transmits power to the rotatingshaft 3 through a transmission mechanism, and a rotating wheel is fixed on the rotatingshaft 3. A diameter-variableannular 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 aneccentric wheel 4 and thus the diameter-variableannular limitation groove 5 formed on one side surface of theeccentric wheel 4 is round. Four pistonair pump members 15 are provided around theair pump body 1, thepiston rod 7 of each of the pistonair pump members 15 is provided with arolling element 6 at the end thereof, therolling element 6 is embedded in the diameter-variableannular limitation groove 5, the rotatingshaft 3 drives theeccentric wheel 4 to rotate, and therolling element 6 rolls in the circumferential direction of the rotatingshaft 3 within the diameter-variableannular limitation groove 5, thereby driving thepiston rod 7 to perform a reciprocating movement. For reducing wear, therolling element 6 may be a bearing or the roller. - In order to adjust the air flow rate of the vacuum air pump while maintaining the simple and compact structure of the vacuum air pump if necessary, a plurality of the piston
air pump members 15 are uniformly provided in the circumference direction of theeccentric wheel 4 at a regular angle and interval. The pistonair pump members 15 may be provided in pairs around theair pump body 1, and the pair number may be one to three. That is, the number of the pistonair pump members 15 provided around theair pump body 1 is either an odd number or an even number. Generally, when the diameter-variableannular limitation grooves 5 have a regular shape, the pistonair pump members 15 are provided in pairs (i.e., the number of the pistonair pump members 15 is an even number) around theair pump body 1 so that the strain applied to the output shaft of the motor is uniform; and when the diameter-variableannular limitation grooves 5 have an irregular shape, the pistonair pump members 15 may be not provided in pairs (i.e., the number of the pistonair pump members 15 is an odd number) around theair pump body 1. In this case, it will be appreciated that they may be also provided in pairs. For ease of arrangement, the outer shape of theair pump body 1 is a polygon prism or a cylinder. In the embodiments shown inFIGS. 3 to 5 , the outer shape of theair pump body 1 is a quadrangular prism. Two pairs of pistonair pump members 15 are provided (i.e., the number of the pistonair pump members 15 is four) in the four directions of theair pump body 1. - As shown in
FIG. 3 , in order for the reliable connection of the pistonair pump members 15 with theair pump body 1, theair pump body 1 is provided withpositioning grooves 9, the positions of which correspond to the positions where the pistonair pump members 15 are provided and the shapes of which correspond to the outer shapes of the pistonair pump members 15. If necessary, various transmission mechanisms may be used to transmit power from the drivingmotor 2 to the rotatingshaft 3. For example, the transmission mechanism in the present embodiment comprises asynchronous wheel 10 provided on the shaft of thedriving motor 2 and asynchronous belt wheel 11 provided on the rotatingshaft 3, wherein thewheels synchronous belt 12. - As shown in
FIGS. 3 to 5 , the operation process of the vacuum air pump of the present invention is as follows: when the vacuum air pump starts to operate, the drivingmotor 2 rotates, and its output shaft drives the rotatingshaft 3 to rotate via thesynchronous wheel 10, thesynchronous belt 12 and thesynchronous belt wheel 11. While the rotatingshaft 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 therotating shaft 3 within the diameter-variableannular limitation groove 5, thereby driving thepiston rod 7 to perform a reciprocating movement. Specifically, as therolling element 6 rolls in the circumferential direction of the rotatingshaft 3 within the diameter-variableannular limitation groove 5, the distance from the end of thepiston rod 7 to the rotating center of theeccentric wheel 4 varies in different directions of the eccentric circumference of the eccentric wheel. With the propulsive force from the inside of the outer wall of the diameter-variableannular limitation groove 5, the end of thepiston rod 7 is pulled towards the rotating center of theeccentric wheel 4 so that thepiston rod 7 is gradually extended to the maximum length; and with the propulsive force from the outside of the inner wall of the diameter-variableannular limitation groove 5, the end of thepiston rod 7 is pulled away from the rotating center of theeccentric wheel 4 so that thepiston rod 7 is gradually retracted to the minimum length. Fourpiston rods 7 provided around theair pump body 1 perform the reciprocating movement in turns, thereby accomplishing vacuum pumping. As shown inFIG. 5 , four pistonair pump members 15 provided around theair pump body 1 are indicated by thenumbers eccentric wheel 4 rotates once, each of the cylinders connected to theeccentric wheel 4 performs the reciprocating movement for one time, and the four cylinders indicated by thenumbers 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. As shown inFIG. 6 , the difference of the present embodiment from the first embodiment is: in the present embodiment, the pistonair pump members 15 are provided in three pairs, i.e., six pistonair pump members 15 indicated by thenumbers 1 to 6 are provided uniformly around theair pump body 1. For the reason that the number of the pistonair pump members 15 becomes greater, the outer shape of theair pump body 1 is a cylinder, for ease of arrangement. - In addition, 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 therotating shaft 3, wherein the driving gear and the driven gear are engaged with each other. - Other technical features of the present embodiment are substantially the same as those of the first embodiment and their detailed description can be consulted in in the first embodiment and will be omitted herein.
-
FIG. 7 is a structural view of a diameter-variable annular limitation groove of the third embodiment of the present invention. As shown inFIG. 7 , the diameter-variable annular limitation groove in the present embodiment is an irregularly-shapedgroove 1000. The pistonair pump members 15 are provided around the air pump body in plural pairs, thepiston rod 7 of each of the pistonair pump members 15 is provided with a rolling element at the end, the rolling element is embedded in the irregularly-shapedgroove 1000, the rotating shaft drives the rotating wheel to rotate, and the rolling element rolls within the irregularly-shapedgroove 1000 in the circumferential direction of the rotating shaft to thereby drive thepiston rod 7 to make a reciprocating movement depending on the size change in radius of the irregularly-shapedgroove 1000. -
FIG. 8 is a structural view of a diameter-variable annular limitation groove of the fourth embodiment according to the present invention. As shown inFIG. 8 , the diameter-variable annular limitation groove in the present embodiment is anelliptical groove 2000. The pistonair pump members 15 are provided around the air pump body in plural pairs, thepiston rod 7 of each of the pistonair pump members 15 is provided with a rolling element at the end, the rolling element is embedded in theelliptical 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 theelliptical groove 2000 has long and short axes, to thereby drive thepiston rod 7 to make a reciprocating movement depending on the size change in long and short axes of theelliptical groove 2000. In particular, when theelliptical groove 2000 is symmetrical with respect to the rotating shaft and the pistonair pump members 15 are provided symmetrically in pairs and at two sides of theelliptical groove 2000, thepiston 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.
- From the above, 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. Even if the suction cup is lifted by particles on the glass surface, it will not lose the vacuum degree soon due to that the air flow rate of the vacuum air pump is large, so 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.
Claims (11)
1. A vacuum air pump comprises a driving motor (2), an air pump body (1) and a piston air pump member (15) provided on the air pump body, characterized in that, a rotating shaft (3) is provided in the air pump body (1), the driving motor (2) transmits power to the rotating shaft (3) via a transmission mechanism, a rotating wheel is fixed on the rotating shaft (3), a diameter-variable annular limitation groove (5) is formed in one side surface of the rotating wheel; at least two piston air pump members (15) are provided around the air pump body (1), a 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 rotating wheel to rotate, and the rolling element (6) rolls within the diameter-variable annular limitation groove (5) along the circumferential direction of the rotating shaft (3) to thereby drive the piston rod (7) to make a reciprocating movement depending on the size change in radius of the diameter-variable annular limitation groove.
2. The vacuum air pump of claim 1 , characterized in that, the diameter-variable annular limitation groove (5) is an eccentric groove, an irregularly-shaped groove or an elliptical groove.
3. The vacuum air pump of claim 1 , characterized in that, the piston air pump members (15) are provided around the air pump body (1) in pairs.
4. The vacuum air pump of claim 3 , characterized in that, the piston air pump members (15) are well-distributed provided in the circumferential direction of the rotating wheel at an equal angel interval.
5. The vacuum air pump of claim 3 , characterized in that, the pair number of the piston air pump members (15) is one to three.
6. The vacuum air pump of claim 5 , characterized in that, the outer shape of the air pump body (1) is a polygon prism or a cylinder.
7. The vacuum air pump of claim 4 , characterized in that, the air pump body (1) is provided with a positioning groove (9), the position of the positioning groove (9) corresponds to the position where the piston air pump member (15) is provided, and the shape of the positioning groove (9) corresponds to the outer shape of the piston air pump member (15).
8. The vacuum air pump of claim 1 , characterized in that, the transmission mechanism comprises a synchronous wheel (10) provided on the shaft of the driving motor and a synchronous belt wheel (11) provided on the rotating shaft (3), wherein the synchronous wheel (10) and the synchronous belt wheel (11) are connected to each other via a synchronous belt (12).
9. The vacuum air pump of claim 1 , characterized in that, the transmission mechanism comprises 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.
10. The vacuum air pump of claim 1 , characterized in that, the rolling element (6) is a bearing or a roller.
11. A glass-wiping device comprises a suction unit and a walking unit, the glass-wiping device is adsorbed 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, characterized in that, the vacuum air pump is the vacuum air pump of claim 1 .
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201310072063.3 | 2013-03-06 | ||
CN201310072063.3A CN104033357B (en) | 2013-03-06 | 2013-03-06 | Vacuum air pump and window-cleaning device |
PCT/CN2014/072978 WO2014135101A1 (en) | 2013-03-06 | 2014-03-06 | Vacuum air pump and glass-wiping apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
US20160106278A1 true US20160106278A1 (en) | 2016-04-21 |
Family
ID=51464290
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/772,938 Abandoned US20160106278A1 (en) | 2013-03-06 | 2014-03-06 | Vacuum Air Pump and Glass-Wiping Apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US20160106278A1 (en) |
EP (1) | EP2966300A1 (en) |
CN (1) | CN104033357B (en) |
WO (1) | WO2014135101A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN117185675A (en) * | 2023-09-12 | 2023-12-08 | 浙江富新太阳能有限公司 | Optical glass preform for pressing automobile lens |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105089964B (en) * | 2015-08-28 | 2017-09-12 | 黑龙江景宏石油设备制造有限公司 | Oil field drill radial plunger slush pump |
CN105411468A (en) * | 2015-12-10 | 2016-03-23 | 王宏强 | Intelligent climbing robot cleaner |
CN114652472B (en) * | 2022-03-18 | 2024-07-05 | 深圳瑞科时尚电子有限公司 | Multiple piston drive assembly for an oral care device and oral care device |
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US2261263A (en) * | 1939-02-01 | 1941-11-04 | Mine Safety Appliances Co | Vacuum pump |
US5145339A (en) * | 1989-08-08 | 1992-09-08 | Graco Inc. | Pulseless piston pump |
US5839532A (en) * | 1995-03-22 | 1998-11-24 | Honda Giken Kogyo Kabushiki Kaisha | Vacuum wall walking apparatus |
WO2008152055A1 (en) * | 2007-06-14 | 2008-12-18 | D.V.P. Vacuum Technology S.R.L. | Orbiting-spiral scroll pump or compressor |
US20120177524A1 (en) * | 2009-10-26 | 2012-07-12 | Fumito Komatsu | Rotary cylinder device |
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JP2005256793A (en) * | 2004-03-15 | 2005-09-22 | Yoshimoto Seisakusho:Kk | Vacuum pump |
CN101315074A (en) * | 2008-06-21 | 2008-12-03 | 张桂云 | Reciprocating apparatus of plunger pump |
CN101696681A (en) * | 2009-10-21 | 2010-04-21 | 浙江鸿友压缩机制造有限公司 | Cam-restricting reciprocating piston type compressor |
CN201802572U (en) * | 2010-07-16 | 2011-04-20 | 中禾亚股份有限公司 | Energy-doubling liquid pressure pump |
CN202376015U (en) * | 2011-11-15 | 2012-08-15 | 王靖瑜 | Intelligent window cleaning robot |
CN203130411U (en) * | 2013-03-06 | 2013-08-14 | 科沃斯机器人科技(苏州)有限公司 | Vacuum air pump and window cleaner |
-
2013
- 2013-03-06 CN CN201310072063.3A patent/CN104033357B/en active Active
-
2014
- 2014-03-06 US US14/772,938 patent/US20160106278A1/en not_active Abandoned
- 2014-03-06 WO PCT/CN2014/072978 patent/WO2014135101A1/en active Application Filing
- 2014-03-06 EP EP14760143.9A patent/EP2966300A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US2261263A (en) * | 1939-02-01 | 1941-11-04 | Mine Safety Appliances Co | Vacuum pump |
US5145339A (en) * | 1989-08-08 | 1992-09-08 | Graco Inc. | Pulseless piston pump |
US5839532A (en) * | 1995-03-22 | 1998-11-24 | Honda Giken Kogyo Kabushiki Kaisha | Vacuum wall walking apparatus |
WO2008152055A1 (en) * | 2007-06-14 | 2008-12-18 | D.V.P. Vacuum Technology S.R.L. | Orbiting-spiral scroll pump or compressor |
US20120177524A1 (en) * | 2009-10-26 | 2012-07-12 | Fumito Komatsu | Rotary cylinder device |
Cited By (1)
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CN117185675A (en) * | 2023-09-12 | 2023-12-08 | 浙江富新太阳能有限公司 | Optical glass preform for pressing automobile lens |
Also Published As
Publication number | Publication date |
---|---|
CN104033357B (en) | 2017-05-10 |
CN104033357A (en) | 2014-09-10 |
WO2014135101A1 (en) | 2014-09-12 |
EP2966300A1 (en) | 2016-01-13 |
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Owner name: SUZHOU ECOVACS COMMERCIAL ROBOT CO., LTD., CHINA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FENG, YONGBING;REEL/FRAME:036982/0181 Effective date: 20150923 |
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STCB | Information on status: application discontinuation |
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