EP0683323B1 - Vorlaufrad einer Pumpe für Windschutzscheibenwascher bei Kraftfahrzeugen - Google Patents

Vorlaufrad einer Pumpe für Windschutzscheibenwascher bei Kraftfahrzeugen Download PDF

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Publication number
EP0683323B1
EP0683323B1 EP95401157A EP95401157A EP0683323B1 EP 0683323 B1 EP0683323 B1 EP 0683323B1 EP 95401157 A EP95401157 A EP 95401157A EP 95401157 A EP95401157 A EP 95401157A EP 0683323 B1 EP0683323 B1 EP 0683323B1
Authority
EP
European Patent Office
Prior art keywords
plunger
pump
rod
rotor
priming
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.)
Expired - Lifetime
Application number
EP95401157A
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English (en)
French (fr)
Other versions
EP0683323A1 (de
Inventor
Denis Tores
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.)
D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste
Original Assignee
D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste
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.)
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Publication date
Application filed by D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste filed Critical D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste
Publication of EP0683323A1 publication Critical patent/EP0683323A1/de
Application granted granted Critical
Publication of EP0683323B1 publication Critical patent/EP0683323B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2277—Rotors specially for centrifugal pumps with special measures for increasing NPSH or dealing with liquids near boiling-point

Definitions

  • the invention relates to a plunger for a pump of the type of those intended for window washers of motor vehicle, a pump comprising such a plunger, as well as a window washer comprising such a pump.
  • Pumps of the type for those used for window washers motor vehicle include, conventionally, a DC motor intended to be connected to the battery of an accumulator, and having an output shaft axial pivoting at the end of which is mounted, wedged angularly, a rotor, and a plunger which, on the one hand, has a liquid inlet terminal opening and which, on the other hand, is in communication with an orifice of lateral and tangential outlet.
  • the diver is mainly consisting of a conduit presenting the terminal entry opening and a side edge interior, and a pump priming rod, which is housed coaxially in the duct and which is connected fixedly fixed by one end to the rotor which controls the rotational movement of the priming rod around the longitudinal axis of the rotor.
  • Such a pump can be integrated, for example, in a window washer for a motor vehicle, comprising in addition, a washing liquid reservoir arranged that the washing liquid in the tank is sucked by the pump in operation via of the conduit to be forced back to downstream circuits such a spray nozzle attached to the body (or the wiper itself), through a hose and of the outlet.
  • the pumps include, housed in the plunger, a rod made of a rigid material allowing obtain, during operation, a very low sound level, but at the expense of the pump priming time which is then longer and can be, for example, of the order of 30 seconds in the case of non-return valves, at the pump outlet, on the downstream circuits.
  • the pump priming time which is then longer and can be, for example, of the order of 30 seconds in the case of non-return valves, at the pump outlet, on the downstream circuits.
  • Document FR-A-2 495 238 relates to a pump centrifugal to circulate washing liquid on the surface of a motor vehicle window, provided with a inlet manifold mounted on a pump housing coaxially with the movable impeller of the pump and in which extends a central rod integral with the pump wheel and which is converging towards its free end.
  • EP-A-445 092 relates to a device for a pump and more particularly a pump in which the risks of damage, difficult to spot and due more particularly to the layers created at the bottom of the container by pollution remains, are decreased.
  • the invention therefore aims to overcome these disadvantages and finding a good compromise between time pump priming and noise level in operation.
  • the invention firstly proposes a diver as described at the beginning of this document and in which the priming rod is made of a sufficiently flexible material, so that when it rotates around the axis longitudinal of the rotor, it curves away from this axis without coming into contact with the inner side edge of the duct, thus creating a suction cone causing the instantaneous rise of the liquid in the conduit and therefore immediate priming of the pump.
  • the invention relates to a pump of the type under consideration, comprising a plunger such as described above
  • the invention relates to a windscreen washer for a motor vehicle having a such pump.
  • Figure 1 is a schematic sectional view through axial plane of a pump according to the invention mounted on a windscreen washer tank.
  • Figure 2 is a schematic sectional view of a plunger according to the invention in the case where the pump is in operation.
  • FIG. 3a is a partial schematic view in cut, and on a larger scale, of the priming rod of the plunger according to the invention.
  • Figure 3b is a sectional view of the rod of Figure 3a, along line D-D.
  • the invention relates to a plunger 1 which includes a conduit 3 having a terminal inlet opening 3a of liquid and an inner side edge 3b, and a rod priming 4, and which is intended for a pump of the type of that used for motor vehicle window washers.
  • Such a window washer includes a reservoir 5 for a washing liquid L, pump 2 for dispensing liquid washing, a hose (not shown) connected to a nozzle outlet 6 of said pump, and at least one nozzle of spray (not shown) mounted at the outlet of said pipe.
  • the pump 2 comprises a motor 7 with a pivoting axial output shaft 8, at level of the extreme part 8a from which is mounted, wedged angularly, a rotor 9.
  • This pump further comprises the plunger 1 which is mounted on the tank 5 so as to enter it while the pump body 2 is placed outside the tank 4, the priming rod 4 being fixedly connected to the rotor 9.
  • the conduit 3 is then, when mounted on the tank 5, directed downwards and the bottom 5a of the tank with the pump body 2 above, the longitudinal axis 9a for pivoting the rotor 9 being substantially vertical.
  • the pump 2 When the pump 2 is activated, the liquid L of the tank 5 is sucked in through line 3, through through the opening 3a, then driven back, thanks to the pump 2, to the outlet nozzle 6 and from there to the downstream circuits of the window washer.
  • the pump 2 comprises a body 2a forming a support and protection, particularly in the general form of an envelope; the DC motor 7 housed in the body 2a; a electrical connector 10 located on the body 2a comprising plugs allowing connection to a battery accumulator; a housing in one or more parts, more or less complicated, delimiting a room 12, having an axial inlet port 13 and a exit 14 lateral and tangential, communicating respectively with conduit 3 and inlet opening 3a on the one hand, and the outlet nozzle 6 on the other hand.
  • the output shaft 8 of the motor 7 is axial and enters chamber 12 by crossing so sufficiently liquid tight the casing.
  • the rotor 9 On the end 8a of the output shaft 8 of the motor, is therefore mounted the rotor 9 to which is fixed, by its end 4e, the priming rod 4 of the plunger 1, the rotor causing the rotation movement of the priming rod 4 around the longitudinal axis 9a of the rotor.
  • the priming rod 4 is in flexible material so that when rotated around the longitudinal axis 9a of the rotor, it curves deviating from this axis 9a without coming into contact with the lateral internal edge 3b of the duct.
  • the free end 4a of the priming rod 4 makes an angle ⁇ with the axis longitudinal 9a of rotor 9, less than the angle it done with this same axis when it is in contact with the lateral internal edge 3b of the duct.
  • This change in position of the priming rod 4 generates a variation in volume in the duct 3 which causes the suction of liquid L.
  • the priming rod 4 may have a section transverse 4b of general shape substantially rectangular, the short sides of which correspond to sides of smaller width, and whose long sides correspond to the sides of greater width.
  • the small sides 4c of the cross section 4b of the rod priming 4 have an arc shape whose diameter is substantially equal to the width l of large sides 4d of said cross section 4a, the large 4d sides with a curved shape.
  • the priming rod 4 of plunger 1 can be conical in shape.
  • the short sides 4c of the section transverse 4a of the rod are inscribed in a cone whose the large base corresponds to the 4th end of the attached rod to the rotor and whose small base corresponds to the end free 4a of the rod.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Claims (6)

  1. Tauchkolben (1) für eine Pumpe (2) und mit einem Kanal (3), mit einer Eintrittsendöffnung (3a) der Flüssigkeit (L) und einer seitlichen Innenkante (3b), wobei eine Ansaugstange (4) koaxial im Kanal (3) gelagert und an einem Ende (4e) mit einem Rotor (9) verbunden ist, der die Rotationsbewegung der Ansaugstange (4) um die Längsachse (9a) des Rotors (9) herum steuert, dadurch gekennzeichnet, daß die Ansaugstange (4) aus einem hinreichend flexiblen Werkstoff besteht, so daß sie sich bei ihrer Rotation um die Längsachse (9a) des Rotors (9) herum nach innen biegt und sich von dieser Achse entfernt, ohne mit der seitlichen Innenkante (3b) des Kanals (3) in Kontakt zu treten, um somit einen Ansaugkegel zu bilden, der das prompte Anheben der Flüssigkeit (L) im Kanal und demnach das sofortige Ansaugen der Pumpe bewirkt.
  2. Tauchkolben (1) nach Anspruch 1, dadurch gekennzeichnet, daß die Ansaugstange (4) einen Querschnitt (4b) von im allgemeinen etwa rechteckiger Form aufweist.
  3. Tauchkolben (1) nach Anspruch 2, dadurch gekennzeichnet, daß die Schmalseiten (4c) des Querschnitts (4b) der Ansaugstange (4) eine Kreisbogenform aufweisen, deren Durchmesser etwa der Breite (1) der Breitseiten (4d) des besagten Querschnitts (4b) entsprechen, wobei die Breitseiten (4d) des Querschnitts (4b) eine nach innen gebogene Form aufweisen.
  4. Tauchkolben (1) nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Schmalseiten (4c) des Querschnitts (4b) in Längsrichtung der Ansaugstange (4) in einen Kegelstumpf eingelenkt sind, dessen lange Basis dem am Rotor (9) befestigten Ende (4e) der Stange (4) entspricht und dessen kurze Basis dem freien Ende (4a) der Stange (4) entspricht.
  5. Pumpe (2) des Typs für Fensterwaschvorrichtungen von Automobilfenstern, mit einem Motor (7) mit einer schwenkenden axialen Ausgangswelle (8), an deren Ende (8a) ein Rotor (9) winkelig verkeilt montiert ist, und einem Tauchkolben (1), der einerseits eine Endeintrittsöffnung (3a) der Flüssigkeit umfaßt und andererseits in Verbindung mit einer seitlichen und tangentialen Austrittsöffnung (14) steht, dadurch gekennzeichnet, daß der Tauchkolben (1) ein Tauchkolben nach einem der Ansprüche 1 bis 4 ist.
  6. Fensterwaschvorrichtung für Automobile, mit einem Reservoir (5) für die Waschflüssigkeit (L), einer Verteilerpumpe (2) der Waschflüssigkeit (L) nach Anspruch 5, deren Tauchkolben (1) innerhalb des Reservoirs (5) angeordnet ist, und einem an einem Ausgangsstutzen (6) angeschlossenen Schlauch, der mit der seitlichen und tangentialen Austrittsöffnung (14) in Verbindung steht, und an dessen Ausgang ein Zerstäubungsansatz montiert ist.
EP95401157A 1994-05-18 1995-05-18 Vorlaufrad einer Pumpe für Windschutzscheibenwascher bei Kraftfahrzeugen Expired - Lifetime EP0683323B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406090 1994-05-18
FR9406090A FR2720121B1 (fr) 1994-05-18 1994-05-18 Plongeur destiné à une pompe du type de celles destinées aux lave-vitres de véhicule automobile; pompe comprenant un tel plongeur; et lave-vitres pour véhicule automobile comprenant une telle pompe.

Publications (2)

Publication Number Publication Date
EP0683323A1 EP0683323A1 (de) 1995-11-22
EP0683323B1 true EP0683323B1 (de) 1998-08-05

Family

ID=9463328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401157A Expired - Lifetime EP0683323B1 (de) 1994-05-18 1995-05-18 Vorlaufrad einer Pumpe für Windschutzscheibenwascher bei Kraftfahrzeugen

Country Status (5)

Country Link
EP (1) EP0683323B1 (de)
AT (1) ATE169378T1 (de)
DE (1) DE69503836T2 (de)
ES (1) ES2122473T3 (de)
FR (1) FR2720121B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3910665B2 (ja) * 1996-10-11 2007-04-25 株式会社不二工機 排水ポンプ
US6015276A (en) * 1996-12-18 2000-01-18 Valeo, Inc. System and method for reducing vibration in a windshield washer pump
GB2434619A (en) * 2005-09-22 2007-08-01 Kautex Textron Cvs Ltd Self priming centrifugal pump

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES244882Y (es) * 1979-07-30 1984-02-16 Transpar Iberica Sa Bomba electrica para lavaparabrisas
DE8030909U1 (de) * 1980-11-19 1982-05-13 Robert Bosch Gmbh, 7000 Stuttgart Kreiselpumpe zum foerdern von waschfluessigkeit auf die oberflaeche einer scheibe an einem kraftfahrzeug
FR2510674A1 (fr) * 1981-07-28 1983-02-04 Denis Tores Rotor de pompe centrifuge, pompe centrifuge comportant un tel rotor et lave-glace pour vehicule comportant une telle pompe
SE464318B (sv) * 1990-02-28 1991-04-08 Flygt Ab Axelkonstruktion foer en med pumphjulet roterande omroerare
FR2673446B1 (fr) * 1991-02-28 1995-02-03 Realisa Indles Cales Et Rotor a ailettes destine a une pompe du type de celles destinees aux lave-vitres de vehicule automobile; pompe comprenant un tel rotor; et lave-vitres pour vehicule automobile comprenant une telle pompe.
DE4128536A1 (de) * 1991-08-28 1993-03-04 Hella Kg Hueck & Co Kreiselpumpe, insbesondere waschwasserpumpe zur scheibenreinigung von kraftfahrzeugen

Also Published As

Publication number Publication date
EP0683323A1 (de) 1995-11-22
FR2720121B1 (fr) 1996-08-02
ES2122473T3 (es) 1998-12-16
ATE169378T1 (de) 1998-08-15
DE69503836D1 (de) 1998-09-10
FR2720121A1 (fr) 1995-11-24
DE69503836T2 (de) 1999-04-15

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