EP1564412B1 - Blower unit for the radiator of the cooling system of a motor vehicle - Google Patents

Blower unit for the radiator of the cooling system of a motor vehicle Download PDF

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Publication number
EP1564412B1
EP1564412B1 EP05290232A EP05290232A EP1564412B1 EP 1564412 B1 EP1564412 B1 EP 1564412B1 EP 05290232 A EP05290232 A EP 05290232A EP 05290232 A EP05290232 A EP 05290232A EP 1564412 B1 EP1564412 B1 EP 1564412B1
Authority
EP
European Patent Office
Prior art keywords
rotor
propeller
bowl
stator
radiator
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
EP05290232A
Other languages
German (de)
French (fr)
Other versions
EP1564412A1 (en
Inventor
Christophe Mosbach
Elmoulate Koukam
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.)
Flex N Gate France SAS
Original Assignee
Faurecia Bloc Avant SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faurecia Bloc Avant SAS filed Critical Faurecia Bloc Avant SAS
Publication of EP1564412A1 publication Critical patent/EP1564412A1/en
Application granted granted Critical
Publication of EP1564412B1 publication Critical patent/EP1564412B1/en
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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F04D29/646—Mounting or removal of fans

Definitions

  • the invention relates to spare parts for vehicles, and more particularly to electric motor-fans that cooperate with the radiators of the engine cooling circuits.
  • the fans of the motor-fan units placed in front of the radiators of the vehicle engine cooling circuits are mounted on a drive plate, which itself is fitted on the shaft of the brushless motor (brushless) of the fan.
  • This solution provides a good speed of attachment of the propeller, but has the disadvantage of leading to a relatively large axial size of the device.
  • the proposed solution is not optimal from this point of view.
  • the fixing of the bowl of the propeller on the cylinder head is made by riveting.
  • the main objective is to generate a flow of cooling air between the stator and the rotor.
  • a space is provided between the stator and the bottom of the rotor yoke to allow the circulation of air.
  • this space makes it possible to maintain a safety distance between the windings of the stator and the internal protrusion of the rivets fixing the propeller on the cylinder head of the rotor.
  • This protrusion is dimensionally difficult to control, in that the riveting is blind for the inner part. It is therefore necessary to oversize the space to ensure that said uncontrolled outgrowth will not come into contact with the stator.
  • riveting is a relatively long operation, requiring a special position on the production line.
  • this method of attachment does not allow easy disassembly and reassembly of the assembly.
  • disassembly requires destruction of the connection between the rotor and the propeller.
  • the object of the invention is to provide manufacturers of vehicle accessories a group-motor-fan radiator cooling circuit as space-saving as possible in the axial direction, easy to mount, inexpensive, and preferably allowing a non-destructive dismantling of the whole.
  • the subject of the invention is a motor-fan unit for a cooling circuit radiator of a vehicle, comprising a stator, a rotor in the form of a cylinder head at least partially surrounding the stator and provided with an axis, a helix provided with blades integral with a central bowl and means for directly securing the bowl to the rotor, characterized in that the said securing means are a type maintaining a dimensional integrity between a state before assembly of the motor-fan unit and a state after assembly of the motor-fan unit.
  • said securing means allow non-destructive disassembly of the propeller.
  • Said securing means may comprise lugs formed on one of the parts selected from the rotor and the bowl of the propeller and corresponding recesses formed on the other of said parts, and an elastic clip mounted on the axis of the rotor pushing the bowl of the propeller against the rotor.
  • Said securing means may comprise screws.
  • Said securing means may comprise bolts.
  • Said securing means may comprise a bayonet.
  • the invention consists in using means for securing the bowl of the propeller to the cylinder head of the rotor which retain their original dimensions permanently, so that the relative positions of the different parts are always perfectly determined. There is therefore no need to provide an oversized safety space between the propeller and the rotor, and the overall axial size of the assembly can be reduced as much as possible.
  • these securing means comprise lugs formed on the bowl of the propeller and corresponding housings formed on the cylinder head of the rotor, as well as a clip coming on the axis of the engine to hold the propeller in position. pressing it against the rotor.
  • lugs formed on the bowl of the propeller and corresponding housings formed on the cylinder head of the rotor, as well as a clip coming on the axis of the engine to hold the propeller in position. pressing it against the rotor.
  • the positions of the lugs and the housing can be reversed with respect to what has just been described.
  • the propeller 4 is not secured to the yoke 1 of the rotor by an intermediate piece fitted on the axis 2, but is fixed directly on the cylinder head 1 of the rotor, preferably removably.
  • the bowl 5 has a central orifice 7 for the passage of the axis 2. It also has, on its face 8 facing the yoke 1, lugs 9 which, when the propeller 4 is mounted on the cylinder head 1, penetrate into corresponding orifices formed in the yoke 1 of the rotor.
  • These lugs 9 and these orifices 10 are typically four in number, offset by 90 ° on a circumference, but they can of course be more or less numerous.
  • Fixing the helix 4 on the rotor 1 is completed by an elastic clip 11 which is inserted into a groove 12 formed at the end of the axis 2 which protrudes from the bowl 5 of the propeller 4 after its in place, and tends to press the bowl 5 against the cylinder head 1 of the rotor. In this way, a separation of the propeller 4 and the cylinder head 1 is possible only by a voluntary action of the user.
  • the assembly of the motor-fan unit according to the invention is particularly fast and easy, as is its disassembly which is carried out in a non-destructive manner.
  • the lugs could be arranged on the yoke 1 of the rotor and the orifices on the bowl 5 of the propeller 4.
  • the orifices 10 could be replaced by depressions or blind holes.
  • any type of housing for the pins 9 would be suitable.

Landscapes

  • 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)

Description

L'invention concerne les pièces détachées pour véhicules, et plus particulièrement les moto-ventilateurs électriques qui coopèrent avec les radiateurs des circuits de refroidissement du moteur.The invention relates to spare parts for vehicles, and more particularly to electric motor-fans that cooperate with the radiators of the engine cooling circuits.

Classiquement, les hélices des groupes moto-ventilateurs placés devant les radiateurs des circuits de refroidissement de moteurs de véhicules sont montées sur une platine d'entraînement, elle-même emmanchée sur l'arbre du moteur sans balai (brushless) du ventilateur. Cette solution procure une bonne rapidité de la fixation de l'hélice, mais a l'inconvénient de conduire à un encombrement axial relativement important du dispositif.Conventionally, the fans of the motor-fan units placed in front of the radiators of the vehicle engine cooling circuits are mounted on a drive plate, which itself is fitted on the shaft of the brushless motor (brushless) of the fan. This solution provides a good speed of attachment of the propeller, but has the disadvantage of leading to a relatively large axial size of the device.

Il a été proposé dans le document EP-A-1 050 682 de monter le bol de l'hélice directement sur la culasse tournante du rotor du moteur du groupe moto-ventilateur. On supprime ainsi la platine d'entraînement, et cette suppression pourrait permettre de réaliser la réduction souhaitée de l'encombrement axial du moteur et de ses annexes.It was proposed in the document EP-A-1,050,682 mount the bowl of the propeller directly on the rotating yoke of the motor rotor of the fan motor unit. This eliminates the drive plate, and this removal could achieve the desired reduction in the axial size of the engine and its annexes.

Cependant, la solution proposée n'est pas optimale de ce point de vue. En effet, la fixation du bol de l'hélice sur la culasse est réalisée par rivetage. En fait, dans le dispositif décrit, l'objectif principal est de générer un flux d'air de refroidissement entre le stator et le rotor. A cet effet, un espace est ménagé entre le stator et le fond de la culasse du rotor pour permettre la circulation de l'air. En outre cet espace permet de conserver une distance de sécurité entre les enroulements du stator et l'excroissance intérieure des rivets fixant l'hélice sur la culasse du rotor. Cette excroissance est dimensionnellement difficile à maîtriser, en ce que le rivetage se fait en aveugle pour la partie intérieure. Il est donc nécessaire de surdimensionner l'espace pour garantir que ladite excroissance non contrôlée ne viendra pas au contact du stator. De plus, le rivetage est une opération relativement longue, nécessitant un poste spécial sur la ligne de fabrication.However, the proposed solution is not optimal from this point of view. Indeed, the fixing of the bowl of the propeller on the cylinder head is made by riveting. In fact, in the device described, the main objective is to generate a flow of cooling air between the stator and the rotor. For this purpose, a space is provided between the stator and the bottom of the rotor yoke to allow the circulation of air. In addition, this space makes it possible to maintain a safety distance between the windings of the stator and the internal protrusion of the rivets fixing the propeller on the cylinder head of the rotor. This protrusion is dimensionally difficult to control, in that the riveting is blind for the inner part. It is therefore necessary to oversize the space to ensure that said uncontrolled outgrowth will not come into contact with the stator. In addition, riveting is a relatively long operation, requiring a special position on the production line.

Enfin, ce mode de fixation n'autorise pas un démontage et un remontage aisés de l'ensemble. En particulier, le démontage impose une destruction de la liaison entre le rotor et l'hélice.Finally, this method of attachment does not allow easy disassembly and reassembly of the assembly. In particular, disassembly requires destruction of the connection between the rotor and the propeller.

Le document US-A-5944497 montre un groupe moto-ventilateur ayant les caractéristiques du préambule de la revendication 1.The document US Patent 5944497 shows a motor-fan unit having the features of the preamble of claim 1.

Le but de l'invention est de proposer aux constructeurs d'accessoires de véhicules un groupe-moto-ventilateur du radiateur du circuit de refroidissement aussi peu encombrant que possible dans le sens axial, facile à monter, peu coûteux, et autorisant de préférence un démontage non destructif de l'ensemble.The object of the invention is to provide manufacturers of vehicle accessories a group-motor-fan radiator cooling circuit as space-saving as possible in the axial direction, easy to mount, inexpensive, and preferably allowing a non-destructive dismantling of the whole.

A cet effet, l'invention a pour objet un groupe moto-ventilateur pour radiateur de circuit de refroidissement d'un véhicule, comprenant un stator, un rotor en forme de culasse entourant au moins partiellement le stator et pourvu d'un axe, une hélice pourvue de pales solidaires d'un bol central et des moyens de solidarisation directe du bol au rotor, caractérisé en ce que lesdits moyens de solidarisation sont d'un type conservant une intégrité dimensionnelle entre un état avant assemblage du groupe moto-ventilateur et un état après assemblage du groupe moto-ventilateur.For this purpose, the subject of the invention is a motor-fan unit for a cooling circuit radiator of a vehicle, comprising a stator, a rotor in the form of a cylinder head at least partially surrounding the stator and provided with an axis, a helix provided with blades integral with a central bowl and means for directly securing the bowl to the rotor, characterized in that the said securing means are a type maintaining a dimensional integrity between a state before assembly of the motor-fan unit and a state after assembly of the motor-fan unit.

De préférence lesdits moyens de solidarisation autorisent un démontage non destructif de l'hélice.Preferably said securing means allow non-destructive disassembly of the propeller.

Lesdits moyens de solidarisation peuvent comporter des ergots ménagés sur l'une des pièces choisie parmi le rotor et le bol de l'hélice et des logements correspondants ménagés sur l'autre desdites pièces, et un clip élastique monté sur l'axe du rotor poussant le bol de l'hélice contre le rotor.Said securing means may comprise lugs formed on one of the parts selected from the rotor and the bowl of the propeller and corresponding recesses formed on the other of said parts, and an elastic clip mounted on the axis of the rotor pushing the bowl of the propeller against the rotor.

Lesdits moyens de solidarisation peuvent comporter des vis.Said securing means may comprise screws.

Lesdits moyens de solidarisation peuvent comporter des boulons.Said securing means may comprise bolts.

Lesdits moyens de solidarisation peuvent comporter une baïonnette.Said securing means may comprise a bayonet.

Comme on l'aura compris, l'invention consiste à utiliser des moyens de solidarisation du bol de l'hélice à la culasse du rotor qui conservent leurs dimensions d'origine en permanence, de sorte que les positionnements relatifs des différentes pièces sont toujours parfaitement déterminés. Il n'est donc aucunement nécessaire de prévoir un espace de sécurité surdimensionné entre l'hélice et le rotor, et l'encombrement axial de l'ensemble peut être réduit autant que possible.As will be understood, the invention consists in using means for securing the bowl of the propeller to the cylinder head of the rotor which retain their original dimensions permanently, so that the relative positions of the different parts are always perfectly determined. There is therefore no need to provide an oversized safety space between the propeller and the rotor, and the overall axial size of the assembly can be reduced as much as possible.

Typiquement, ces moyens de solidarisation comportent des ergots ménagés sur le bol de l'hélice et des logements correspondants ménagés sur la culasse du rotor, ainsi qu'un clip venant s'emmancher sur l'axe du moteur pour maintenir l'hélice en position en la pressant contre le rotor. Bien entendu, les positions des ergots et des logements peuvent être inversées par rapport à ce qui vient d'être décrit.Typically, these securing means comprise lugs formed on the bowl of the propeller and corresponding housings formed on the cylinder head of the rotor, as well as a clip coming on the axis of the engine to hold the propeller in position. pressing it against the rotor. Of course, the positions of the lugs and the housing can be reversed with respect to what has just been described.

L'invention sera mieux comprise à la lecture de la description qui suit, donnée en référence à la figure unique annexée qui représente (fig.1a), vu en coupe longitudinale, un exemple d'ensemble rotor/hélice de groupe moto-ventilateur du radiateur du circuit de refroidissement d'un véhicule, ainsi (fig.1b) qu'un détail agrandi de cette figure.The invention will be better understood on reading the description which follows, given with reference to the single appended figure which represents ( fig.1a ), seen in longitudinal section, an example of a rotor / propeller assembly of motorcycle fan unit of the radiator of the cooling circuit of a vehicle, thus ( fig.1b ) an enlarged detail of this figure.

Comme il est habituel, le groupe moto-ventilateur selon l'invention se compose :

  • d'un moteur électrique comprenant un stator (non représenté) et un rotor en forme de culasse 1, entourant au moins partiellement le stator, solidaire d'un axe 2 tournant dans des paliers 3 ménagés dans le stator ;
  • et d'une hélice 4 comportant un bol central 5 auquel sont fixées des pales 6.
As is customary, the motor-fan unit according to the invention consists of:
  • an electric motor comprising a stator (not shown) and a rotor in the form of a cylinder head 1, at least partially surrounding the stator, integral with an axis 2 rotating in bearings 3 formed in the stator;
  • and a helix 4 comprising a central bowl 5 to which blades 6 are fixed.

Selon l'invention, et contrairement à la pratique la plus courante jusqu'ici, l'hélice 4 n'est pas rendue solidaire de la culasse 1 du rotor par une pièce intermédiaire emmanchée sur l'axe 2, mais est fixée directement sur la culasse 1 du rotor, de préférence de manière amovible. A cet effet, le bol 5 comporte un orifice central 7 pour le passage de l'axe 2. Il comporte également, sur sa face 8 tournée vers la culasse 1, des ergots 9 qui, lorsque l'hélice 4 est montée sur la culasse 1, pénètrent dans des orifices 10 correspondants ménagés dans la culasse 1 du rotor. Ces ergots 9 et ces orifices 10 sont typiquement au nombre de quatre, décalés de 90° sur une circonférence, mais ils peuvent bien entendu être plus ou moins nombreux.According to the invention, and contrary to the most common practice so far, the propeller 4 is not secured to the yoke 1 of the rotor by an intermediate piece fitted on the axis 2, but is fixed directly on the cylinder head 1 of the rotor, preferably removably. To this end, the bowl 5 has a central orifice 7 for the passage of the axis 2. It also has, on its face 8 facing the yoke 1, lugs 9 which, when the propeller 4 is mounted on the cylinder head 1, penetrate into corresponding orifices formed in the yoke 1 of the rotor. These lugs 9 and these orifices 10 are typically four in number, offset by 90 ° on a circumference, but they can of course be more or less numerous.

La fixation de l'hélice 4 sur le rotor 1 est complétée par un clip élastique 11 qui vient s'insérer dans une rainure 12 ménagée à l'extrémité de l'axe 2 qui dépasse du bol 5 de l'hélice 4 après sa mise en place, et tend à plaquer le bol 5 contre la culasse 1 du rotor. De cette façon, une désolidarisation de l'hélice 4 et de la culasse 1 n'est possible que par une action volontaire de l'utilisateur.Fixing the helix 4 on the rotor 1 is completed by an elastic clip 11 which is inserted into a groove 12 formed at the end of the axis 2 which protrudes from the bowl 5 of the propeller 4 after its in place, and tends to press the bowl 5 against the cylinder head 1 of the rotor. In this way, a separation of the propeller 4 and the cylinder head 1 is possible only by a voluntary action of the user.

Dans la configuration décrite et représentée, le montage du groupe moto-ventilateur selon l'invention est particulièrement rapide et aisé, de même que son démontage qui s'effectue de manière non destructive.In the configuration described and shown, the assembly of the motor-fan unit according to the invention is particularly fast and easy, as is its disassembly which is carried out in a non-destructive manner.

En variante, comme on l'a dit, les ergots pourraient être ménagés sur la culasse 1 du rotor et les orifices sur le bol 5 de l'hélice 4. Les orifices 10 pourraient être remplacés par des dépressions ou des trous borgnes. De manière générale, tout type de logement destiné aux ergots 9 serait convenable.Alternatively, as has been said, the lugs could be arranged on the yoke 1 of the rotor and the orifices on the bowl 5 of the propeller 4. The orifices 10 could be replaced by depressions or blind holes. In general, any type of housing for the pins 9 would be suitable.

De même, on pourrait remplacer le système de fixation à ergots, orifices et clip élastique par d'autres moyens équivalents tels que des vis, des boulons, une baïonnette.Similarly, one could replace the fastening system lugs, holes and elastic clip by other equivalent means such as screws, bolts, a bayonet.

Par rapport au dispositif à rivets révélé par EP-A-1 050 682 , l'invention présente comme avantages :

  • une parfaite réversibilité du montage du groupe moto-ventilateur ;
  • une rapidité de ce même montage, au moins dans les cas où aucun outil n'est nécessaire à cet effet ;
  • surtout, la possibilité de calculer au plus juste les dimensions des différentes pièces, puisque ces dimensions demeurent inchangées tout au long du montage et de la vie du groupe moto-ventilateur ; on n'a pas à tenir compte, en particulier, des incertitudes sur les dimensions définitives de rivets ou d'autres moyens de fixation de dimensions aléatoires ; on peut ainsi en toute sécurité minimiser les dimensions de l'ensemble, en particulier dans la direction axiale.
Compared to the rivet device revealed by EP-A-1,050,682 the invention has the following advantages:
  • a perfect reversibility of the assembly of the motor-fan unit;
  • a speed of this same assembly, at least in cases where no tool is necessary for this purpose;
  • above all, the possibility of calculating as precisely as possible the dimensions of the different pieces, since these dimensions remain unchanged throughout assembly and life of the fan motor unit; in particular, uncertainties about the final dimensions of rivets or other means of fixing random dimensions need not be taken into account; it is thus safe to minimize the dimensions of the assembly, especially in the axial direction.

Claims (1)

  1. Motorized-fan unit for the radiator of a cooling circuit of a vehicle, said unit comprising a stator, a rotor (1) in the form of a yoke which at least partially surrounds the stator and is provided with a shaft (2), a propeller (4) provided with blades (6) which axe integral with a central bowl (5), and means for directly fastening said bowl (5) to the rotor (1), the said fastening means being of a type that retains dimensional integrity between a state before assembly of the motorized-fan unit and a state after assembly of said motorized-fan unit, the said fastening means permitting non-destructive dismantling of the propeller (4), and the said fastening means comprising studs (9) arranged on one of the parts chosen from among the rotor (1) and the bowl (5) of the propeller (4), and corresponding clearances (10) arranged on the other of the said parts, characterised in that the said fastening means comprise an elastic clip (11) which is inserted in a groove (12) arranged at the end of the shaft (2) that projects beyond the bowl (5) of the propeller (4) after it has been placed in position, and which clip pushes the bowl (5) of the propeller (4) against the rotor (1).
EP05290232A 2004-02-17 2005-02-02 Blower unit for the radiator of the cooling system of a motor vehicle Expired - Lifetime EP1564412B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0401577A FR2866396B1 (en) 2004-02-17 2004-02-17 MOTOR FAN ASSEMBLY FOR A COOLING SYSTEM RADIATOR OF A VEHICLE.
FR0401577 2004-02-17

Publications (2)

Publication Number Publication Date
EP1564412A1 EP1564412A1 (en) 2005-08-17
EP1564412B1 true EP1564412B1 (en) 2012-11-28

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Application Number Title Priority Date Filing Date
EP05290232A Expired - Lifetime EP1564412B1 (en) 2004-02-17 2005-02-02 Blower unit for the radiator of the cooling system of a motor vehicle

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EP (1) EP1564412B1 (en)
FR (1) FR2866396B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944497A (en) * 1997-11-25 1999-08-31 Siemens Canada Limited Fan assembly having an air directing member to cool a motor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2511507A1 (en) * 1975-03-15 1976-09-30 Licentia Gmbh Coupling for electric motor fan - has disc shaped holding element with profiled centre slots and spring support
US5871335A (en) * 1995-10-31 1999-02-16 Siemens Electric Limited Twist-lock attachment system for a cooling fan and motor
IT1308475B1 (en) 1999-05-07 2001-12-17 Gate Spa FAN MOTOR, IN PARTICULAR FOR A HEAT EXCHANGER OF A VEHICLE
FR2805573B1 (en) * 2000-02-25 2002-06-07 Ecia Equip Composants Ind Auto FAN FOR MOTOR VEHICLE
DE10013609A1 (en) * 2000-03-18 2001-09-20 Bosch Gmbh Robert Fixture to secure cover plate to a smooth drive shaft of power tool or ventilator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5944497A (en) * 1997-11-25 1999-08-31 Siemens Canada Limited Fan assembly having an air directing member to cool a motor

Also Published As

Publication number Publication date
FR2866396A1 (en) 2005-08-19
FR2866396B1 (en) 2006-06-30
EP1564412A1 (en) 2005-08-17

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