EP0683323A1 - Impeller inducer for a pump of the type used in motor vehicle windscreen washers - Google Patents

Impeller inducer for a pump of the type used in motor vehicle windscreen washers Download PDF

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Publication number
EP0683323A1
EP0683323A1 EP95401157A EP95401157A EP0683323A1 EP 0683323 A1 EP0683323 A1 EP 0683323A1 EP 95401157 A EP95401157 A EP 95401157A EP 95401157 A EP95401157 A EP 95401157A EP 0683323 A1 EP0683323 A1 EP 0683323A1
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EP
European Patent Office
Prior art keywords
plunger
rod
pump
rotor
priming
Prior art date
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Granted
Application number
EP95401157A
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German (de)
French (fr)
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EP0683323B1 (en
Inventor
Denis Tores
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D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste
Original Assignee
D'ETUDES ET DE REALISATIONS INDUSTRIELLES ET COMMERCIALES SERIC Ste
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    • 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 intended for window washers of a motor vehicle, a pump comprising such a plunger, as well as a window washer comprising such a pump.
  • Pumps of the type of those intended for window washers of a motor vehicle conventionally comprise a direct current motor intended to be connected to the battery of an accumulator, and having a pivotable axial output shaft at the end of which is mounted , angularly wedged, a rotor, and a plunger which, on the one hand, has a terminal liquid inlet opening and which, on the other hand, is in communication with a lateral and tangential outlet orifice.
  • the plunger consists mainly of a conduit having the terminal inlet opening and an inner lateral edge, and a pump priming rod, which is housed coaxially in the conduit and which is fixedly connected 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 further comprising a washing liquid reservoir arranged so that the washing liquid in the reservoir is sucked by the pump in operation by the '' through the conduit to be discharged to downstream circuits such as a spray nozzle attached to the body (or the wiper itself), through a hose and the outlet.
  • a washing liquid reservoir arranged so that the washing liquid in the reservoir is sucked by the pump in operation by the '' through the conduit to be discharged to downstream circuits such as a spray nozzle attached to the body (or the wiper itself), through a hose and the outlet.
  • the pumps comprise, housed in the plunger, a rod made of a rigid material making it possible to obtain, in operation, a very low noise level, but to the detriment of the priming time of the pump which is then longer and can be , for example, of the order of 30 seconds in the case of the presence of non-return valves, at the pump outlet, on the downstream circuits.
  • the priming time of the pump it is necessary to have an initial priming time of the pump of less than 3 s.
  • Document FR-A-2 495 238 relates to a centrifugal pump for circulating washing liquid on the surface of a motor vehicle window, provided with an inlet pipe mounted on a pump casing coaxially with the moving wheel of the pump and in which extends a central rod integral with the pump wheel and which converges towards its free end.
  • Document EP-A-445,092 relates to a device for a pump and more particularly a pump in which the risks of damage, difficult to identify and due more particularly to the layers created at the bottom of the container by pollution remains, are reduced.
  • the invention therefore aims to overcome these drawbacks and find a good compromise between the priming time of the pump and the noise level in operation.
  • the invention firstly proposes a plunger as described at the beginning of this document and in which the priming rod is made of a flexible material, so that during its rotation about the axis longitudinal of the rotor, it curves away from this axis without coming into contact with the inner lateral edge of the duct, thus creating a suction cone causing the instantaneous rise of the water in the duct and therefore the immediate priming of the pump.
  • the invention relates to a pump of the type considered, comprising a plunger as described above
  • the invention relates to a window washer for a motor vehicle having such a pump.
  • Figure 1 is a schematic view in section through an axial plane of a pump according to the invention mounted on a windshield washer reservoir.
  • Figure 2 is a schematic sectional view of a plunger according to the invention in the case where the pump is in operation.
  • Figure 3a is a schematic, partial view, in section, 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 the line DD.
  • the invention relates to a plunger 1 which has a conduit 3 having an end inlet opening 3a for liquid and an internal lateral edge 3b, and a priming rod 4, and which is intended for a pump of the type used for motor vehicle window washers.
  • Such a window cleaner comprises a reservoir 5 for washing liquid L, the pump 2 for dispensing washing liquid, a pipe (not shown) connected to an outlet nozzle 6 of said pump, and at least one spray nozzle. (not shown) mounted at the outlet of said pipe.
  • the pump 2 comprises a motor 7 with a pivoting axial output shaft 8, at the end portion 8a of which is mounted, angularly wedged, a rotor 9.
  • This pump further comprises the plunger 1 which is mounted on the reservoir 5 so as to penetrate therein while the body of the pump 2 is placed outside the reservoir 4, the priming rod 4 being fixedly connected to the rotor 9.
  • the conduit 3 is then, when mounted on the reservoir 5, directed downwards and the bottom 5a of the reservoir with the body of the pump 2 above, the longitudinal axis 9a of pivoting of the rotor 9 being substantially vertical.
  • the pump 2 When the pump 2 is activated, the liquid L from the reservoir 5 is sucked in through the conduit 3, through the opening 3a, then discharged, thanks to the pump 2, towards the outlet nozzle 6 and from there, to the downstream circuits of the window cleaner.
  • the pump 2 comprises a body 2a forming a support and protection in particular in the general form of an envelope; the DC motor 7 housed in the body 2a; an electrical connector 10 located on the body 2a comprising plugs allowing connection to a storage battery; a casing 11 in one or more parts, of more or less complicated shape, delimiting a chamber 12, having an axial inlet orifice 13 and an outlet orifice 14 lateral and tangential, communicating respectively with the conduit 3 and the opening d 'inlet 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 the chamber 12 by passing through the casing 11 in a sufficiently liquid-tight manner.
  • 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 rotational movement of the rod priming 4 around the longitudinal axis 9a of the rotor.
  • the priming rod 4 is made of flexible material so that, when it rotates around the longitudinal axis 9a of the rotor, it curves in 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 makes 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 conduit 3 which causes the suction of the liquid L.
  • the priming rod 4 may have a cross section 4b of generally substantially rectangular shape, the short sides of which correspond to the sides of the smallest width, and the long sides of which correspond to the sides of greater width.
  • the short sides 4c of the cross section 4b of the priming rod 4 have an arcuate shape, the diameter of which is substantially equal to the width 1 of the long sides 4d of said cross section 4a, the long sides 4d having a curved shape.
  • the priming rod 4 of the plunger 1 can be of conical shape.
  • the short sides 4c of the cross section 4a of the rod are inscribed in a cone whose large base corresponds to the 4th end of the rod fixed to the rotor and whose small base corresponds to the free end 4a of the rod.

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

Abstract

The plunger (1) consists of a tube (3) with an inlet (3a) in the end and a coaxial inner priming rod (4) connected to a rotor (9). The rod is made from a flexible material which is able to curve as it rotates but does not make contact with the inner surface of the tube. The rod is rectangular in cross-section with curved edges - the narrower edges being convex in shape and the broader ones concave. The pump has a motor (7) with an axial output shaft (8) on which the rotor is mounted and the plunger immersed in the washing liquid in reservoir (5a). <IMAGE>

Description

L'invention concerne un plongeur destiné à une pompe du type de celles destinées aux lave-vitres de véhicule automobile, une pompe comportant un tel plongeur, ainsi qu'un lave-vitres comportant une telle pompe.The invention relates to a plunger for a pump of the type intended for window washers of a motor vehicle, a pump comprising such a plunger, as well as a window washer comprising such a pump.

Les pompes du type de celles destinées aux lave-vitres de véhicule automobile comprennent, classiquement, un moteur à courant continu destiné à être branché sur la batterie d'un accumulateur, et ayant un arbre de sortie axial pivotant à l'extrémité duquel est monté, calé angulairement, un rotor, et un plongeur qui, d'une part, comporte une ouverture terminale d'entrée du liquide et qui, d'autre part, est en communication avec un orifice de sortie latéral et tangentiel. Le plongeur est principalement constitué d'un conduit présentant l'ouverture terminale d'entrée et un bord latéral intérieur, et d'une tige d'amorçage de la pompe, qui est logée coaxialement dans le conduit et qui est reliée de manière fixe au rotor qui commande le mouvement de rotation de la tige d'amorçage autour de l'axe longitudinal du rotor.Pumps of the type of those intended for window washers of a motor vehicle conventionally comprise a direct current motor intended to be connected to the battery of an accumulator, and having a pivotable axial output shaft at the end of which is mounted , angularly wedged, a rotor, and a plunger which, on the one hand, has a terminal liquid inlet opening and which, on the other hand, is in communication with a lateral and tangential outlet orifice. The plunger consists mainly of a conduit having the terminal inlet opening and an inner lateral edge, and a pump priming rod, which is housed coaxially in the conduit and which is fixedly connected to the rotor which controls the rotational movement of the priming rod around the longitudinal axis of the rotor.

Une telle pompe peut être intégrée, par exemple, dans un lave-vitres pour véhicule automobile comprenant en outre, un réservoir de liquide de lavage agencé de manière que le liquide de lavage se trouvant dans le réservoir soit aspiré par la pompe en fonctionnement par l'intermédiaire du conduit pour être refoulé vers des circuits avals tels qu'un ajutage de pulvérisation fixé à la carrosserie (ou à l'essuie-glace lui-même), par l'intermédiaire d'un tuyau et de l'orifice de sortie.Such a pump can be integrated, for example, in a window washer for a motor vehicle further comprising a washing liquid reservoir arranged so that the washing liquid in the reservoir is sucked by the pump in operation by the '' through the conduit to be discharged to downstream circuits such as a spray nozzle attached to the body (or the wiper itself), through a hose and the outlet.

Un des problèmes rencontrés avec de tels lave-vitres est celui de l'amorçage de la pompe, lequel doit intervenir dans un délai de réponse très court (quasi-instantanément pour le conducteur), en toute circonstance, et en particulier au cours du montage, lors de l'amorçage initial.One of the problems encountered with such window washers is that of priming the pump, which must occur within a very short response time (almost instantly for the driver), in all circumstances, and in particular during assembly. , during initial boot.

A ce problème d'amorçage de la pompe, s'ajoute celui du niveau sonore en fonctionnement.To this problem of priming the pump is added that of the noise level during operation.

Usuellement, les pompes comportent, logée dans le plongeur, une tige en un matériau rigide permettant d'obtenir, en fonctionnement, un niveau sonore très bas, mais au détriment du temps d'amorçage de la pompe qui est alors plus long et peut être, par exemple, de l'ordre de 30 secondes dans le cas de la présence de clapets anti-retour, en sortie de pompe, sur les circuits avals. Cependant, dans les chaînes de fabrication actuelles, il est nécessaire d'avoir un temps d'amorçage initial de la pompe inférieur à 3s.Usually, the pumps comprise, housed in the plunger, a rod made of a rigid material making it possible to obtain, in operation, a very low noise level, but to the detriment of the priming time of the pump which is then longer and can be , for example, of the order of 30 seconds in the case of the presence of non-return valves, at the pump outlet, on the downstream circuits. However, in current production lines, it is necessary to have an initial priming time of the pump of less than 3 s.

On connaît, en outre, d'après le document FR-A-2 673 446, une pompe dont l'objectif est de résoudre ce problème. Cependant la solution apportée dans le document concerne plus particulièrement les ailettes du rotor et le fait qu'au moins deux ailettes de rotor ont au moins leurs deux parties extrêmes libres distales qui présentent, en section droite radiale longitudinale ou orthoradiale transversale, deux profils substantiellement différents.Furthermore, from document FR-A-2 673 446, a pump is known whose objective is to solve this problem. However, the solution provided in the document relates more particularly to the rotor fins and the fact that at least two rotor fins have at least their two distal free end portions which have, in longitudinal radial or transverse orthoradial cross section, two substantially different profiles. .

Le document FR-A-2 495 238 concerne une pompe centrifuge pour faire circuler du liquide de lavage sur la surface d'une glace de véhicule automobile, pourvue d'une tubulure d'entrée montée sur un carter de pompe coaxialement à la roue mobile de la pompe et dans laquelle s'étend une tige centrale solidaire de la roue de pompe et qui est convergente vers son extrémité libre.Document FR-A-2 495 238 relates to a centrifugal pump for circulating washing liquid on the surface of a motor vehicle window, provided with an inlet pipe mounted on a pump casing coaxially with the moving wheel of the pump and in which extends a central rod integral with the pump wheel and which converges towards its free end.

Cependant, ce document propose une structure complexe de plongeur.However, this document proposes a complex structure of a diver.

Le document EP-A-445 092 concerne un dispositif pour une pompe et plus particulièrement une pompe dans laquelle les risques d'endommagement, difficiles à repérer et dus plus particulièrement aux couches créées au fond du récipient par des restes de pollution, sont diminués.Document EP-A-445,092 relates to a device for a pump and more particularly a pump in which the risks of damage, difficult to identify and due more particularly to the layers created at the bottom of the container by pollution remains, are reduced.

Cependant, pour ce dispositif, il est prévu d'ajouter des moyens de mélange pour permettre d'obtenir le résultat souhaité.However, for this device, it is planned to add mixing means to allow the desired result to be obtained.

Enfin, l'état de la technique est également défini de manière plus générale par le documents FR-A-2 510 674, FR-A-2 462 594 et EP-A-0 534 126.Finally, the state of the art is also defined more generally by the documents FR-A-2 510 674, FR-A-2 462 594 and EP-A-0 534 126.

L'invention a donc pour but de pallier ces inconvénients et de trouver un bon compromis entre le temps d'amorçage de la pompe et le niveau sonore en fonctionnement.The invention therefore aims to overcome these drawbacks and find a good compromise between the priming time of the pump and the noise level in operation.

A cet effet, l'invention propose tout d'abord un plongeur tel que décrit au début du présent document et dans lequel la tige d'amorçage est en un matériau flexible, de telle sorte que lors de sa rotation autour de l'axe longitudinal du rotor, elle s'incurve en s'écartant de cet axe sans entrer en contact avec le bord latéral intérieur du conduit, en créant ainsi un cône d'aspiration provoquant la montée instantanée de l'eau dans le conduit et donc l'amorçage immédiat de la pompe.To this end, the invention firstly proposes a plunger as described at the beginning of this document and in which the priming rod is made of a flexible material, so that during its rotation about the axis longitudinal of the rotor, it curves away from this axis without coming into contact with the inner lateral edge of the duct, thus creating a suction cone causing the instantaneous rise of the water in the duct and therefore the immediate priming of the pump.

Selon un autre aspect, l'invention concerne une pompe du type considéré, comportant un plongeur tel que décrit ci-dessusAccording to another aspect, the invention relates to a pump of the type considered, comprising a plunger as described above

Enfin, selon un dernier aspect, l'invention concerne un lave-vitres pour véhicule automobile ayant une telle pompe.Finally, according to a last aspect, the invention relates to a window washer for a motor vehicle having such a pump.

Les autres caractéristiques de l'invention résulteront de la description qui suivra, en référence aux dessins annexés dans lesquels :The other characteristics of the invention will emerge from the description which follows, with reference to the accompanying drawings in which:

La figure 1 est une vue schématique en coupe par plan axial d'une pompe selon l'invention montée sur un réservoir de lave-vitres.Figure 1 is a schematic view in section through an axial plane of a pump according to the invention mounted on a windshield washer reservoir.

La figure 2 est une vue schématique en coupe d'un plongeur selon l'invention dans le cas où la pompe est en fonctionnement.Figure 2 is a schematic sectional view of a plunger according to the invention in the case where the pump is in operation.

La figure 3a est une vue schématique, partielle, en coupe, et à plus grande échelle, de la tige d'amorçage du plongeur selon l'invention.Figure 3a is a schematic, partial view, in section, and on a larger scale, of the priming rod of the plunger according to the invention.

Enfin, la figure 3b est une vue en coupe de la tige de la figure 3a, selon la ligne D-D.Finally, Figure 3b is a sectional view of the rod of Figure 3a, along the line DD.

L'invention concerne un plongeur 1 qui comporte un conduit 3 présentant une ouverture terminale d'entrée 3a de liquide et un bord latéral intérieur 3b, et une tige d'amorçage 4, et qui est destiné à une pompe du type de celle utilisée pour les lave-glaces de véhicule automobile.The invention relates to a plunger 1 which has a conduit 3 having an end inlet opening 3a for liquid and an internal lateral edge 3b, and a priming rod 4, and which is intended for a pump of the type used for motor vehicle window washers.

Un tel lave-vitres comprend un réservoir 5 pour un liquide de lavage L, la pompe 2 de distribution de liquide de lavage, un tuyau (non représenté) branché sur un embout de sortie 6 de ladite pompe, et au moins un ajutage de pulvérisation (non représenté) monté à la sortie dudit tuyau.Such a window cleaner comprises a reservoir 5 for washing liquid L, the pump 2 for dispensing washing liquid, a pipe (not shown) connected to an outlet nozzle 6 of said pump, and at least one spray nozzle. (not shown) mounted at the outlet of said pipe.

Dans la variante représentée, la pompe 2 comprend un moteur 7 avec un arbre de sortie 8 axial pivotant, au niveau de la partie extrême 8a duquel est monté, calé angulairement, un rotor 9. Cette pompe comporte en outre le plongeur 1 qui est monté sur le réservoir 5 de manière à pénétrer dans celui-ci tandis que le corps de la pompe 2 est placé à l'extérieur du réservoir 4, la tige d'amorçage 4 étant reliée de manière fixe au rotor 9.In the variant shown, the pump 2 comprises a motor 7 with a pivoting axial output shaft 8, at the end portion 8a of which is mounted, angularly wedged, a rotor 9. This pump further comprises the plunger 1 which is mounted on the reservoir 5 so as to penetrate therein while the body of the pump 2 is placed outside the reservoir 4, the priming rod 4 being fixedly connected to the rotor 9.

Le conduit 3 est alors, lorsque monté sur le réservoir 5, dirigé vers le bas et le fond 5a du réservoir avec le corps de la pompe 2 au-dessus, l'axe longitudinal 9a de pivotement du rotor 9 étant sensiblement vertical.The conduit 3 is then, when mounted on the reservoir 5, directed downwards and the bottom 5a of the reservoir with the body of the pump 2 above, the longitudinal axis 9a of pivoting of the rotor 9 being substantially vertical.

Lorsque la pompe 2 est actionnée, le liquide L du réservoir 5 est aspiré par le conduit 3, par l'intermédiaire de l'ouverture 3a, puis refoulé, grâce à la pompe 2, vers l'embout de sortie 6 et de là, vers les circuits aval du lave-vitres.When the pump 2 is activated, the liquid L from the reservoir 5 is sucked in through the conduit 3, through the opening 3a, then discharged, thanks to the pump 2, towards the outlet nozzle 6 and from there, to the downstream circuits of the window cleaner.

D'autres agencements de pompe 2 sur un réservoir 5 peuvent aussi être envisagés selon les conformations désirées ou nécessaires.Other pump arrangements 2 on a tank 5 can also be envisaged according to the desired or necessary conformations.

La pompe 2 comprend un corps 2a formant support et protection notamment en forme générale d'enveloppe ; le moteur 7 à courant continu logé dans le corps 2a ; un connecteur électrique 10 situé sur le corps 2a comprenant des fiches permettant la connexion sur une batterie d'accumulateur ; un carter 11 en une ou plusieurs parties, de forme plus ou moins compliquée, délimitant une chambre 12, ayant un orifice d'entrée 13 axial et un orifice de sortie 14 latéral et tangentiel, communiquant respectivement avec le conduit 3 et l'ouverture d'entrée 3a d'une part, et l'embout de sortie 6 d'autre part.The pump 2 comprises a body 2a forming a support and protection in particular in the general form of an envelope; the DC motor 7 housed in the body 2a; an electrical connector 10 located on the body 2a comprising plugs allowing connection to a storage battery; a casing 11 in one or more parts, of more or less complicated shape, delimiting a chamber 12, having an axial inlet orifice 13 and an outlet orifice 14 lateral and tangential, communicating respectively with the conduit 3 and the opening d 'inlet 3a on the one hand, and the outlet nozzle 6 on the other hand.

L'arbre de sortie 8 du moteur 7 est axial et pénètre dans la chambre 12 en traversant de façon suffisamment étanche au liquide le carter 11.The output shaft 8 of the motor 7 is axial and enters the chamber 12 by passing through the casing 11 in a sufficiently liquid-tight manner.

Sur l'extrémité 8a de l'arbre de sortie 8 du moteur, est donc monté le rotor 9 auquel est fixée, par son extrémité 4e, la tige d'amorçage 4 du plongeur 1, le rotor provoquant le mouvement de rotation de la tige d'amorçage 4 autour de l'axe longitudinal 9a du rotor.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 rotational movement of the rod priming 4 around the longitudinal axis 9a of the rotor.

Selon l'invention, la tige d'amorçage 4 est en matériau flexible de telle sorte que, lors de sa rotation autour de l'axe longitudinal 9a du rotor, elle s'incurve en s'écartant de cet axe 9a sans entrer en contact avec le bord intérieur latéral 3b du conduit.According to the invention, the priming rod 4 is made of flexible material so that, when it rotates around the longitudinal axis 9a of the rotor, it curves in deviating from this axis 9a without coming into contact with the lateral internal edge 3b of the duct.

Ainsi, en fonctionnement, l'extrémité libre 4a de la tige d'amorçage 4 fait un angle α avec l'axe longitudinal 9a du rotor 9, inférieur à l'angle qu'elle fait avec ce même axe quand elle est en contact avec le bord intérieur latéral 3b du conduit.Thus, in operation, the free end 4a of the priming rod 4 makes an angle α with the axis longitudinal 9a of rotor 9, less than the angle it makes with this same axis when it is in contact with the lateral internal edge 3b of the duct.

Ce changement de position de la tige d'amorçage 4 engendre une variation de volume dans le conduit 3 qui provoque l'aspiration du liquide L.This change in position of the priming rod 4 generates a variation in volume in the conduit 3 which causes the suction of the liquid L.

En se référant plus particulièrement aux figures 3a et 3b, la tige d'amorçage 4 peut présenter une section transversale 4b de forme générale sensiblement rectangulaire, dont les petits côtés correspondent aux cotés de plus faible largeur, et dont les grands côtés correspondent aux côtés de plus grande largeur.Referring more particularly to FIGS. 3a and 3b, the priming rod 4 may have a cross section 4b of generally substantially rectangular shape, the short sides of which correspond to the sides of the smallest width, and the long sides of which correspond to the sides of greater width.

Dans une forme de réalisation préférée, les petits côtés 4c de la section transversale 4b de la tige d'amorçage 4 présentent une forme en arc de cercle dont le diamètre est sensiblement égal à la largeur 1 des grands côtés 4d de ladite section transversale 4a, les grands côtés 4d présentant une forme incurvée.In a preferred embodiment, the short sides 4c of the cross section 4b of the priming rod 4 have an arcuate shape, the diameter of which is substantially equal to the width 1 of the long sides 4d of said cross section 4a, the long sides 4d having a curved shape.

Enfin, selon une forme de réalisation préférée, la tige d'amorçage 4 du plongeur 1 peut être de forme conique. Dans ce cas, dans la direction longitudinale de la tige d'amorçage 4, les petits côtés 4c de la section transversale 4a de la tige sont inscrits dans un cône dont la grande base correspond à l'extrémité 4e de la tige fixée au rotor et dont la petite base correspond à l'extrémité libre 4a de la tige.Finally, according to a preferred embodiment, the priming rod 4 of the plunger 1 can be of conical shape. In this case, in the longitudinal direction of the priming rod 4, the short sides 4c of the cross section 4a of the rod are inscribed in a cone whose large base corresponds to the 4th end of the rod fixed to the rotor and whose small base corresponds to the free end 4a of the rod.

Bien que seuls certains modes de réalisation selon l'invention aient été décrits, il est évident que toute modification apportée dans le même esprit ne sortirait pas du cadre de la présente invention.Although only certain embodiments according to the invention have been described, it is obvious that any modification made in the same spirit would not depart from the scope of the present invention.

Par exemple, d'autres formes de la section transversale de la tige et de la tige elle-même sont réalisables dans le même esprit.For example, other shapes of the cross section of the rod and of the rod itself can be produced in the same spirit.

Claims (6)

Plongeur (1) qui est destiné à une pompe (2) et qui comporte un conduit (3), présentant une ouverture terminale d'entrée (3a) du liquide (L) et un bord latéral intérieur (3b), et une tige d'amorçage (4) logée coaxialement dans le conduit (3) et reliée de manière fixe par une extrémité (4b) à un rotor (9) qui commande le mouvement de rotation de la tige d'amorçage (4) autour de l'axe longitudinal (9a) du rotor (9), caractérisé par le fait que la tige d'amorçage (4) est en un matériau flexible, de telle sorte que, lors de sa rotation autour de l'axe longitudinal (9a) du rotor (9), elle s'incurve en s'écartant de cet axe sans entrer en contact avec le bord latéral intérieur (3b) du conduit (3).Plunger (1) which is intended for a pump (2) and which comprises a conduit (3), having a terminal inlet opening (3a) for the liquid (L) and an internal lateral edge (3b), and a rod d priming (4) housed coaxially in the conduit (3) and fixedly connected by one end (4b) to a rotor (9) which controls the rotational movement of the priming rod (4) around the axis longitudinal (9a) of the rotor (9), characterized in that the priming rod (4) is made of a flexible material, so that, when it rotates around the longitudinal axis (9a) of the rotor ( 9), it curves away from this axis without coming into contact with the inner lateral edge (3b) of the duct (3). Plongeur (1) selon la revendication 1 caractérisé par le fait que la tige d'amorçage (4) présente une section transversale (4b) de forme générale sensiblement rectangulaire.Plunger (1) according to claim 1 characterized in that the priming rod (4) has a cross section (4b) of generally substantially rectangular shape. Plongeur (1) selon la revendication 2 caractérisé par le fait que les petits côtés (4c) de la section transversale (4b) de la tige d'amorçage (4) présentent une forme en arc de cercle dont le diamètre est sensiblement égal à la largeur (1) des grands côtés (4d) de ladite section transversale (4b), les grands côtés (4d) de la section transversale (4b) présentant une forme incurvée.Plunger (1) according to claim 2 characterized in that the short sides (4c) of the cross section (4b) of the priming rod (4) have a circular arc shape whose diameter is substantially equal to the width (1) of the long sides (4d) of said cross section (4b), the long sides (4d) of the cross section (4b) having a curved shape. Plongeur (1) selon la revendication 1, 2 ou 3 caractérisé par le fait que, dans la direction longitudinale de la tige d'amorçage (4), les petits côtés (4c) de la section transversale (4b) sont inscrits dans un cône dont la grande base correspond à l'extrémité (4e) de la tige (4) fixée au rotor (9) et dont la petite base correspond à l'extrémité libre (4a) de la tige (4).Plunger (1) according to claim 1, 2 or 3 characterized in that, in the longitudinal direction of the priming rod (4), the short sides (4c) of the cross section (4b) are inscribed in a cone whose large base corresponds to the end (4th) of the rod (4) fixed to the rotor (9) and whose small base corresponds to the free end (4a) of the rod (4). Pompe (2) du type destiné aux lave-vitres de véhicules automobiles comprenant un moteur (7) avec un arbre de sortie (8) axial pivotant, à l'extrémité (8a) duquel est monté calé angulairement un rotor (9), et un plongeur (1) qui, d'une part, comporte une ouverture terminale d'entrée (3a) du liquide et qui, d'autre part, est en communication avec un orifice de sortie (14) latéral et tangentiel, caractérisé par le fait que le plongeur (1) est un plongeur selon l'une quelconque des revendications 1 à 4.Pump (2) of the type intended for window washers of motor vehicles comprising a motor (7) with a pivoting axial output shaft (8), at the end (8a) of which is angularly mounted a rotor (9), and a plunger (1) which, on the one hand, has a terminal inlet opening (3a) for the liquid and which, on the other hand, is in communication with an outlet orifice (14) lateral and tangential, characterized by fact that the plunger (1) is a plunger according to any one of claims 1 to 4. Lave-vitres pour véhicules automobiles comprenant un réservoir (5) de liquide de lavage (L), une pompe (2) de distribution du liquide de lavage (L) selon la revendication 5, dont le plongeur (1) est placé à l'intérieur du réservoir (5), et un tuyau branché sur un embout de sortie (6) en communication avec l'orifice de sortie (14) latéral et tangentiel, et à la sortie duquel est monté un ajutage de pulvérisation.Window washers for motor vehicles comprising a reservoir (5) of washing liquid (L), a pump (2) for dispensing the washing liquid (L) according to claim 5, the plunger (1) of which is placed at the inside the reservoir (5), and a pipe connected to an outlet nozzle (6) in communication with the lateral and tangential outlet orifice (14) and at the outlet of which is mounted a spray nozzle.
EP95401157A 1994-05-18 1995-05-18 Impeller inducer for a pump of the type used in motor vehicle windscreen washers Expired - Lifetime EP0683323B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9406090 1994-05-18
FR9406090A FR2720121B1 (en) 1994-05-18 1994-05-18 Plunger intended for a pump of the type intended for window washers of a motor vehicle; pump comprising such a plunger; and window washers for a motor vehicle comprising such a pump.

Publications (2)

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

Family

ID=9463328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95401157A Expired - Lifetime EP0683323B1 (en) 1994-05-18 1995-05-18 Impeller inducer for a pump of the type used in motor vehicle windscreen washers

Country Status (5)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836010A1 (en) * 1996-10-11 1998-04-15 Fujikoki Corporation Drainage pump
WO1998027343A1 (en) * 1996-12-18 1998-06-25 Itt Automotive Electrical Systems, Inc. System and method for reducing vibration in a windshield washer pump
WO2007039139A1 (en) * 2005-09-22 2007-04-12 Kautex Textron Cvs Ltd. Liquid pump system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462594A1 (en) 1979-07-30 1981-02-13 Transpar Iberica Sa Vehicle windscreen washer electrical pump - has chamber above turbine for removing air bubbles and flexible double walled seal
FR2495238A3 (en) 1980-11-19 1982-06-04 Bosch Gmbh Robert Centrifugal pump for vehicle windscreen washer - uses electric motor powered centrifugal pump with axial extension from rotor extending into inlet line to improve fluid induction
FR2510674A1 (en) 1981-07-28 1983-02-04 Denis Tores Rotor for automobile windscreen washer pump - has principally radial vane impeller with helical extension in integral moulding
EP0445092A1 (en) 1990-02-28 1991-09-04 Itt Flygt Ab Pump impeller with mixer
FR2673446A1 (en) 1991-02-28 1992-09-04 Realisa Indles Cales Et Bladed rotor intended for a pump of the type of those intended for motor vehicle window washers; pump comprising such a rotor; and window washer for motor vehicle including such a pump
EP0534126A1 (en) 1991-08-28 1993-03-31 Hella KG Hueck & Co. Centrifugal pump, in particular washer pump for cleaning windshields of motor vehicles

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2462594A1 (en) 1979-07-30 1981-02-13 Transpar Iberica Sa Vehicle windscreen washer electrical pump - has chamber above turbine for removing air bubbles and flexible double walled seal
FR2495238A3 (en) 1980-11-19 1982-06-04 Bosch Gmbh Robert Centrifugal pump for vehicle windscreen washer - uses electric motor powered centrifugal pump with axial extension from rotor extending into inlet line to improve fluid induction
FR2510674A1 (en) 1981-07-28 1983-02-04 Denis Tores Rotor for automobile windscreen washer pump - has principally radial vane impeller with helical extension in integral moulding
EP0445092A1 (en) 1990-02-28 1991-09-04 Itt Flygt Ab Pump impeller with mixer
FR2673446A1 (en) 1991-02-28 1992-09-04 Realisa Indles Cales Et Bladed rotor intended for a pump of the type of those intended for motor vehicle window washers; pump comprising such a rotor; and window washer for motor vehicle including such a pump
EP0534126A1 (en) 1991-08-28 1993-03-31 Hella KG Hueck & Co. Centrifugal pump, in particular washer pump for cleaning windshields of motor vehicles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0836010A1 (en) * 1996-10-11 1998-04-15 Fujikoki Corporation Drainage pump
WO1998027343A1 (en) * 1996-12-18 1998-06-25 Itt Automotive Electrical Systems, Inc. System and method for reducing vibration in a windshield washer pump
US6015276A (en) * 1996-12-18 2000-01-18 Valeo, Inc. System and method for reducing vibration in a windshield washer pump
WO2007039139A1 (en) * 2005-09-22 2007-04-12 Kautex Textron Cvs Ltd. Liquid pump system

Also Published As

Publication number Publication date
DE69503836T2 (en) 1999-04-15
EP0683323B1 (en) 1998-08-05
FR2720121A1 (en) 1995-11-24
DE69503836D1 (en) 1998-09-10
FR2720121B1 (en) 1996-08-02
ES2122473T3 (en) 1998-12-16
ATE169378T1 (en) 1998-08-15

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