EP0519800A1 - Apparatus for mounting two conduits on two neighbouring openings of a header of a heat-exchanger - Google Patents

Apparatus for mounting two conduits on two neighbouring openings of a header of a heat-exchanger Download PDF

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Publication number
EP0519800A1
EP0519800A1 EP92401660A EP92401660A EP0519800A1 EP 0519800 A1 EP0519800 A1 EP 0519800A1 EP 92401660 A EP92401660 A EP 92401660A EP 92401660 A EP92401660 A EP 92401660A EP 0519800 A1 EP0519800 A1 EP 0519800A1
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EP
European Patent Office
Prior art keywords
bayonet
openings
pipes
base
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP92401660A
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German (de)
French (fr)
Inventor
Christian Marsais
Frédéric Letrange
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.)
Valeo Thermique Moteur SA
Original Assignee
Valeo Thermique Moteur SA
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 Valeo Thermique Moteur SA filed Critical Valeo Thermique Moteur SA
Publication of EP0519800A1 publication Critical patent/EP0519800A1/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/14—Fastening; Joining by using form fitting connection, e.g. with tongue and groove
    • F28F2275/146—Fastening; Joining by using form fitting connection, e.g. with tongue and groove with bayonet connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/916—Oil cooler

Definitions

  • the invention relates to a device for fixing two pipes to two adjacent openings of a heat exchanger, in particular an exchanger intended for cooling the lubricating oil of the engine of a motor vehicle.
  • the two pipes are used respectively for the inlet and outlet of a liquid, generally brine, intended for cooling the oil, which circulates in an enclosure housed at the inside the housing and generally formed by a stack of pairs of half-plates.
  • the invention particularly aims to overcome the aforementioned drawbacks.
  • the openings have a bayonet fixing configuration; the pipes respectively have bayonet ends suitable for being brought into a locking position on the openings; and the two end pieces are provided with bases shaped as a function of the spacing of the openings and having locking means capable of cooperating with each other when the end pieces are both in the locked position.
  • the attachment of the two tubes is particularly simple and rapid, since they are attached by bayonet means and that the retention of the two end pieces in the locking position is obtained by means of the locking means with which their bases are provided.
  • the device of the invention makes it possible to fix pipes of different shapes and, in particular, bent pipes of smaller size than the brazed or welded pipes in accordance with the prior art.
  • the two bayonet ends are designed to be brought into the locking position in their respective openings by rotation of a fraction of a turn in opposite directions.
  • the two bayonet ends are designed to be brought into the locking position in their respective openings by rotation of a quarter turn.
  • the base of one of the bayonet end pieces has a guiding path in an arc of a circle leading to a locking surface, while the base of the other bayonet end piece has a flexible tab having a free end which, when this other end piece is rotated, is capable of forcing against the guide track and then being housed in the locking surface, the first end piece already in the locking position .
  • the aforementioned flexible tab is non-radial.
  • the respective bases of the two bayonet ends each have a groove housing a seal capable of being compressed between the base and the housing.
  • One of the bases may have a lateral extension provided with an indexing notch which can serve, for example, to index the oil exchanger on the crankcase of the engine of the motor vehicle in question.
  • each of the tubes with its base and its bayonet tip is formed in one piece by molding a plastic material, for example of the polyamide type.
  • each of the pipes is bent, which makes it possible to reduce the overall size of the assembly.
  • FIG. 1 shows a housing 10 of a heat exchanger, in the example of a radiator for cooling the lubricating oil of an engine of a motor vehicle.
  • the housing 10 comprises a wall 12 through which two adjacent openings 14 and 16 are formed, each of which has a bayonet fixing configuration.
  • the openings 14 and 16 are intended to fix respectively two pipes 18 and 20 (FIGS. 2 and 3) attached to the housing 10.
  • the pipes 18 and 20 are intended for the inlet and outlet of a liquid, such as glycol water, for cooling the oil, which circulates in an enclosure (not shown) housed inside the housing 10.
  • a liquid such as glycol water
  • This enclosure which can for example be formed by a stack of pairs of half-plates, is traversed by oil which circulates in a closed circuit and which penetrates and leaves the enclosure at by means of two connection conduits (not shown) sealingly passing through another wall of the housing 10.
  • the openings 14 and 16 have symmetrical shapes to allow, as will be seen below, the fixing of the two pipes 18 and 20 by respective rotations, of a quarter turn each, in opposite directions.
  • the opening 16 is limited by two parallel edges 22 and 24, of unequal length, located at equal distance on either side of an axis 26. It is further limited by an edge 28 which is connected perpendicularly to the edge 22 and which extends to the axis 26. This edge 28 is extended by a edge 30 in an arc which joins with edge 24.
  • edges 22 and 24 are connected together by another edge in an arc 32 with the same radius as edge 30.
  • the two edges 30 and 32 have the same center 34, located at the intersection of the axis 26 and a perpendicular axis 36.
  • the tubing 18 which, in the example, has a bent shape at a right angle is made in one piece with a base 38 adapted to bear against the wall 12 of the housing and with a bayonet fitting 40 of configuration adapted to that of the opening 14.
  • the tubing 20 also has a bent shape at a right angle and it is made in one piece with a base 42 adapted to bear against the wall 12 outside the housing 10 and with a bayonet tip 44 of a shape adapted to that of the opening 16.
  • the ends 40 and 44 (FIG. 3) have symmetrical structures allowing the tubes 18 and 20 to be fixed by rotation of a quarter of a turn in opposite directions.
  • the establishment of the tubing 18 is effected by rotation of a quarter turn counterclockwise, from an insertion position (shown in phantom line), until 'in a locking position (shown in solid lines).
  • the tubing 20 is fixed by rotating a quarter turn clockwise, from an insertion position (shown in phantom line), to a locking position (shown in solid line). ).
  • the pipes 18 and 20 extend in directions substantially parallel to each other in their locked position.
  • the tubing 18 with its base 38 and its fixing tip is advantageously formed by molding in one piece from a plastic material, for example of the polyamide type. It is the same for the tubing 20 with its base 42 and its bayonet tip 44.
  • the bases 38 and 42 are shaped as a function of the spacing of the openings 14 and 16 and they have locking means capable of cooperating with each other when the bayonet ends 40 and 44 are both in the locking position, so as to oppose the unlocking of the two end pieces and, consequently, of the two pipes.
  • the end piece 40 of the tube 18 has an axis of rotation XX and the corresponding base 38 is produced in the form of a flat plate of generally asymmetrical shape which extends perpendicularly to the axis XX.
  • the base 38 has the general shape of a triangle limited by three straight edges 46, 48 and 50.
  • the edges 46 and 50 are joined together by an edge 52 in an arc centered on the axis XX.
  • the edges 46 and 48 are joined together by an edge 54 forming a cutout used for example for indexing on the casing of a vehicle engine.
  • edges 48 and 50 are joined together by an edge 56 in the form of an arc of a circle which, in the locking position of the tube 18, is centered on the axis of rotation X′X ′ of the tube 20 In this locking position, the edge 56 abuts against the base 42 of the tube 20 which has a generally circular shape centered on the axis X′X ′.
  • the base 38 is hollowed out over part of its thickness to form a guide track 58 in the form of an arc of a circle (FIGS. 2 to 4) which, in the locking position of the tube 18, is centered on the axis X′X ′.
  • the guide track 58 starts from the edge 50 and ends at a locking surface 60 which has the shape of a straight edge extending perpendicular to the edge 50 of the base 38 and parallel to the axis 26 of the opening 16 (in the locking position of the tubing 18).
  • the bearing surface 60 is connected perpendicularly with an abutment edge 62 extending parallel to the edge 50 of the base 38 and ending up to the edge 56.
  • the base 42 of the tube 20 comprises a flexible tab 64 ( Figures 2 to 4) which extends in a non-radial direction relative to the axis X′X ′.
  • the tab 64 ends with a free end 66 intended to cooperate with the guide track 58 and the locking surface 60 when the tube 18 has been placed in its locking position.
  • the tubing 18 is first put in place by introduction of the end piece 40 through the opening 14 and rotation of a quarter turn anti-clockwise (arrow F on Figure 2).
  • the tubing 20 is then put in place by inserting its end piece 44 through the opening 16 and by turning it a quarter turn clockwise, as shown by the arrow F ′.
  • the free end 66 of the flexible tongue 64 passes in force against the guide track 58 and comes, at the end of the race, to be housed in the blocking surface 60, while coming into abutment against the edge 62.
  • the pipes 18 and 20 are locked and the cooperation of the locking surface 60 and the flexible tongue 64 prevents any untimely unlocking of the two pipes 18 and 20.
  • each of the bases in the example the base 42, comprises an annular groove 68 centered on the axis of rotation of the nozzle, that is to say the axis X′X ′ In the example.
  • This groove is intended to accommodate an O-ring seal 70 capable of being compressed between the base and the housing to thereby ensure a tight attachment of the tubing on this housing.
  • FIGS. 7 and 8 describe more particularly the cooperation of the bayonet fitting 44 with the corresponding opening 16 of the housing, it should be noted that the configuration of the fitting 40 and the opening 14 are symmetrical .
  • the bayonet fitting 44 (FIG. 8) has a retaining flange 72, the shape of which is adjusted to pass closely through the opening 14.
  • the flange 72 is limited by edges 22 ′, 24 ′, 28 ′, 30 ′ and 32 ′ which correspond respectively to the edges 22, 24, 28, 30 and 32 of the opening 16.
  • the flange 72 is attached to the base 42 by an intermediate section 74 which appears in section in FIG. 8.
  • the section 74 is limited by two opposite edges 76 and 78 in the form of a quarter of a circle centered on the axis X′X ′ and having a smaller radius than the edges 30 ′ and 32 ′ of the flange 72.
  • the edges 76 and 78 are joined together, on one side, by a straight edge 80 coinciding in part with the edge 22 ′ and another straight edge 82 extending parallel at the edge 28 ′.
  • edges 80 and 82 are connected together by a cut edge 84.
  • the edges 76 and 78 are connected together by a straight edge 86 partly coincident with the edge 24 ′ of the flange and a straight edge 88 which extends perpendicularly to the edge 86 and which is connected with the latter by a small edge 90 in the form of an arc of a circle.
  • the end piece After introduction of the flange 72 through the opening 16, in the axial direction XX ′, the end piece is turned a quarter of a turn in the direction of the arrow F ′ to reach the locking position shown in broken lines in FIG. 7.
  • the edges 82 and 86 of the section 74 come to bear respectively against the edges 24 ′ and 22 ′ of the opening 16 which limits the rotation of the end piece.
  • the pipes can be fitted on the same wall of a housing or on two adjacent walls forming an angle between them.
  • the tubing can be fixed by other types of bayonet fittings, either rotating in the direction opposite, as in the example described, either rotating in the same direction.

Abstract

The invention relates to a device for fixing two conduits (18, 20) on two neighbouring openings (14, 16) of a header (10) of a heat-exchanger. <??>According to the invention, the openings (14, 16) have a bayonet-fixing configuration, the conduits (18, 20) comprise respectively bayonet end-pieces (40, 44) which are suitable for being brought into the locked position on the openings and the two end-pieces are provided with base parts (38, 42) shaped according to the spacing of the openings and having securing means (58, 60, 64) which are suitable for interacting mutually when the end-pieces are both in the locked position. <??>Application in particular to exchangers for cooling the lubricating oil of a motor vehicle engine. <IMAGE>

Description

L'invention concerne un dispositif pour la fixation de deux tubulures sur deux ouvertures voisines d'un échangeur de chaleur, notamment d'un échangeur destiné au refroidissement de l'huile de lubrification du moteur d'un véhicule automobile.The invention relates to a device for fixing two pipes to two adjacent openings of a heat exchanger, in particular an exchanger intended for cooling the lubricating oil of the engine of a motor vehicle.

Dans les échangeurs de chaleur de ce type, les deux tubulures servent respectivement à l'entrée et à la sortie d'un liquide, généralement de l'eau glycolée, destinée au refroidissement de l'huile, laquelle circule dans une enceinte logée à l'intérieur du boîtier et généralement formée par un empilage de paires de demi-plaques.In heat exchangers of this type, the two pipes are used respectively for the inlet and outlet of a liquid, generally brine, intended for cooling the oil, which circulates in an enclosure housed at the inside the housing and generally formed by a stack of pairs of half-plates.

Jusqu'à présent, les tubulures sont brasées ou soudées sur les ouvertures correspondantes du boîtier, ce qui entraîne un encombrement contraignant surtout, dans le cas où les tubulures sont coudées.Up to now, the pipes have been brazed or welded to the corresponding openings in the housing, which leads to a particularly restrictive bulk, in the case where the pipes are bent.

De plus, la mise en place des tubulures nécessite une opération de brasage ou de soudage, et donc une étape supplémentaire de fabrication.In addition, the establishment of the pipes requires a brazing or welding operation, and therefore an additional manufacturing step.

L'invention a notamment pour but de surmonter les inconvénients précités.The invention particularly aims to overcome the aforementioned drawbacks.

Elle propose à cet effet un dispositif de fixation du type défini en introduction, dans lequel, conformément à l'invention, les ouvertures possèdent une configuration de fixation à baïonnette ; les tubulures comportent respectivement des embouts à baïonnette propres à être amenés en une position de verrouillage sur les ouvertures ; et les deux embouts sont munis d'embases conformées en fonction de l'espacement des ouvertures et possédant des moyens de blocage propres à coopérer mutuellement lorsque les embouts sont tous deux en position de verrouillage.To this end, it proposes a fixing device of the type defined in the introduction, in which, according to the invention, the openings have a bayonet fixing configuration; the pipes respectively have bayonet ends suitable for being brought into a locking position on the openings; and the two end pieces are provided with bases shaped as a function of the spacing of the openings and having locking means capable of cooperating with each other when the end pieces are both in the locked position.

Ainsi, la fixation des deux tubulures est particulièrement simple et rapide, puisque celles-ci sont rapportées par des moyens à baïonnette et que le maintien des deux embouts en position de verrouillage est obtenu grâce aux moyens de blocage dont sont munies leurs embases.Thus, the attachment of the two tubes is particularly simple and rapid, since they are attached by bayonet means and that the retention of the two end pieces in the locking position is obtained by means of the locking means with which their bases are provided.

De cette manière, on est assuré que les deux tubulures ne pourront, par la suite, se déverrouiller de façon intempestive.In this way, it is ensured that the two pipes cannot, in the future, unlock in an untimely manner.

Le dispositif de l'invention permet de fixer des tubulures de différentes formes et, en particulier, des tubulures coudées d'encombrement plus faible que les tubulures brasées ou soudées conformes à la technique antérieure.The device of the invention makes it possible to fix pipes of different shapes and, in particular, bent pipes of smaller size than the brazed or welded pipes in accordance with the prior art.

Dans une forme de réalisation préférée de l'invention, les deux embouts à baïonnette sont prévus pour être amenés en position de verrouillage dans leurs ouvertures respectives par rotation d'une fraction de tour dans des sens opposés.In a preferred embodiment of the invention, the two bayonet ends are designed to be brought into the locking position in their respective openings by rotation of a fraction of a turn in opposite directions.

De préférence, les deux embouts à baïonnette sont prévus pour être amenés en position de verrouillage dans leurs ouvertures respectives par rotation d'un quart de tour.Preferably, the two bayonet ends are designed to be brought into the locking position in their respective openings by rotation of a quarter turn.

Dans une forme de réalisation préférée de l'invention, l'embase de l'un des embouts à baïonnette comporte une voie de guidage en arc de cercle aboutissant à une portée de blocage, tandis que l'embase de l'autre embout à baïonnette comporte une patte flexible ayant une extrémité libre qui, lors de la rotation de cet autre embout, est propre à passer en force contre la voie de guidage et venir ensuite se loger dans la portée de blocage, le premier embout étant déjà en position de verrouillage.In a preferred embodiment of the invention, the base of one of the bayonet end pieces has a guiding path in an arc of a circle leading to a locking surface, while the base of the other bayonet end piece has a flexible tab having a free end which, when this other end piece is rotated, is capable of forcing against the guide track and then being housed in the locking surface, the first end piece already in the locking position .

Ainsi, après avoir amené le premier embout en position de verrouillage, il suffit de mettre en place l'autre embout et de le faire tourner pour l'amener dans sa position de verrouillage en laquelle les moyens de blocage des deux embases coopèrent mutuellement pour s'opposer au déverrouillage des deux embouts.Thus, after having brought the first endpiece into the locking position, it suffices to put the other endpiece in place and to rotate it to bring it into its locking position in which the locking means of the two bases cooperate mutually to s oppose the unlocking of the two end caps.

Avantageusement, la patte flexible précitée est non radiale.Advantageously, the aforementioned flexible tab is non-radial.

Selon une autre caractéristique de l'invention, les embases respectives des deux embouts à baïonnette comportent chacune une gorge logeant un joint d'étanchéité propre à être comprimé entre l'embase et le boîtier.According to another characteristic of the invention, the respective bases of the two bayonet ends each have a groove housing a seal capable of being compressed between the base and the housing.

L'une des embases peut comporter un prolongement latéral muni d'une encoche d'indexation pouvant servir, par exemple, à indexer l'échangeur d'huile sur le carter du moteur du véhicule automobile considéré.One of the bases may have a lateral extension provided with an indexing notch which can serve, for example, to index the oil exchanger on the crankcase of the engine of the motor vehicle in question.

Avantageusement, chacune des tubulures avec son embase et son embout à baïonnette est formée d'une seule pièce par moulage d'une matière plastique, par exemple du type polyamide.Advantageously, each of the tubes with its base and its bayonet tip is formed in one piece by molding a plastic material, for example of the polyamide type.

Dans une forme de réalisation préférée de l'invention, chacune des tubulures est coudée, ce qui permet de diminuer l'encombrement de l'ensemble.In a preferred embodiment of the invention, each of the pipes is bent, which makes it possible to reduce the overall size of the assembly.

Dans la description qui suit, donnée à titre d'exemple, on se refère aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en plan d'un boîtier d'échangeur de chaleur, comportant deux ouvertures voisines réalisées conformément à l'invention ;
  • la figure 2 est une vue analogue à celle de la figure 1 montrant le même boîtier sur lequel sont fixées deux tubulures en position de verrouillage ;
  • la figure 3 est une vue de côté du boîtier de la figure 2 ;
  • la figure 4 est une vue en coupe suivant la ligne IV-IV de la figure 3 ;
  • la figure 5 est une vue latérale d'une tubulure ;
  • la figure 6 est une vue en coupe axiale de l'embase et de l'embout à baïonnette d'une tubulure ;
  • la figure 7 est une vue en plan d'une des ouvertures du boîtier ; et
  • la figure 8 est une vue en coupe transversale d'un embout à baïonnette adapté à l'ouverture de la figure 7.
In the description which follows, given by way of example, reference is made to the appended drawings, in which:
  • Figure 1 is a plan view of a heat exchanger housing, having two adjacent openings made in accordance with the invention;
  • Figure 2 is a view similar to that of Figure 1 showing the same housing on which are fixed two tubes in the locked position;
  • Figure 3 is a side view of the housing of Figure 2;
  • Figure 4 is a sectional view along line IV-IV of Figure 3;
  • Figure 5 is a side view of a tubing;
  • Figure 6 is an axial sectional view of the base and the bayonet tip of a tube;
  • Figure 7 is a plan view of one of the housing openings; and
  • FIG. 8 is a cross-sectional view of a bayonet fitting adapted to the opening of FIG. 7.

On se réfère tout d'abord à la figure 1 qui représente un boîtier 10 d'un échangeur de chaleur, dans l'exemple d'un radiateur servant au refroidissement de l'huile de lubrification d'un moteur d'un véhicule automobile. Le boîtier 10 comprend une paroi 12 au travers de laquelle sont ménagées deux ouvertures voisines 14 et 16 dont chacune possède une configuration de fixation à baïonnette.Referring firstly to Figure 1 which shows a housing 10 of a heat exchanger, in the example of a radiator for cooling the lubricating oil of an engine of a motor vehicle. The housing 10 comprises a wall 12 through which two adjacent openings 14 and 16 are formed, each of which has a bayonet fixing configuration.

Les ouvertures 14 et 16 sont destinées à fixer respectivement deux tubulures 18 et 20 (figures 2 et 3) rapportées sur le boîtier 10.The openings 14 and 16 are intended to fix respectively two pipes 18 and 20 (FIGS. 2 and 3) attached to the housing 10.

Dans l'exemple, les tubulures 18 et 20 sont destinées à l'entrée et à la sortie d'un liquide, tel que de l'eau glycolée, pour le refroidissement de l'huile, laquelle circule dans une enceinte (non représentée) logée à l'intérieur du boîtier 10. Cette enceinte, qui peut être par exemple formée par un empilage de paires de demi-plaques, est parcourue par de l'huile qui circule en circuit fermé et qui pénètre et sort de l'enceinte au moyen de deux conduits de raccordement (non représentés) traversant à étanchéité une autre paroi du boîtier 10.In the example, the pipes 18 and 20 are intended for the inlet and outlet of a liquid, such as glycol water, for cooling the oil, which circulates in an enclosure (not shown) housed inside the housing 10. This enclosure, which can for example be formed by a stack of pairs of half-plates, is traversed by oil which circulates in a closed circuit and which penetrates and leaves the enclosure at by means of two connection conduits (not shown) sealingly passing through another wall of the housing 10.

Les ouvertures 14 et 16 ont des formes symétriques pour permettre, comme on le verra plus loin, la fixation des deux tubulures 18 et 20 par des rotations respectives, d'un quart de tour chacune, dans des sens opposés.The openings 14 and 16 have symmetrical shapes to allow, as will be seen below, the fixing of the two pipes 18 and 20 by respective rotations, of a quarter turn each, in opposite directions.

Comme montré aux figures 1 et 7, l'ouverture 16 est limitée par deux bords parallèles 22 et 24, de longueur inégale, situées à égale distance de part et d'autre d'un axe 26. Elle est limitée en outre par un bord 28 qui se raccorde perpendiculairement au bord 22 et qui s'étend jusqu'à l'axe 26. Ce bord 28 se prolonge par un bord 30 en arc de cercle qui se raccorde avec le bord 24. En outre, les bords 22 et 24 sont raccordés entre eux par un autre bord en arc de cercle 32 de même rayon que le bord 30. Les deux bords 30 et 32 ont un même centre 34, situé à l'intersection de l'axe 26 et d'un axe 36 perpendiculaire.As shown in Figures 1 and 7, the opening 16 is limited by two parallel edges 22 and 24, of unequal length, located at equal distance on either side of an axis 26. It is further limited by an edge 28 which is connected perpendicularly to the edge 22 and which extends to the axis 26. This edge 28 is extended by a edge 30 in an arc which joins with edge 24. In addition, edges 22 and 24 are connected together by another edge in an arc 32 with the same radius as edge 30. The two edges 30 and 32 have the same center 34, located at the intersection of the axis 26 and a perpendicular axis 36.

La tubulure 18 qui, dans l'exemple, a une forme coudée à angle droit est réalisée d'une seule pièce avec une embase 38 propre à prendre appui contre la paroi 12 du boîtier et avec un embout à baïonnette 40 de configuration adaptée à celle de l'ouverture 14.The tubing 18 which, in the example, has a bent shape at a right angle is made in one piece with a base 38 adapted to bear against the wall 12 of the housing and with a bayonet fitting 40 of configuration adapted to that of the opening 14.

De façon correspondante, la tubulure 20 possède également une forme coudée à angle droit et elle est réalisée d'une seule pièce avec une embase 42 propre à prendre appui contre la paroi 12 à l'extérieur du boîtier 10 et avec un embout à baïonnette 44 de forme adaptée à celle de l'ouverture 16.Correspondingly, the tubing 20 also has a bent shape at a right angle and it is made in one piece with a base 42 adapted to bear against the wall 12 outside the housing 10 and with a bayonet tip 44 of a shape adapted to that of the opening 16.

Les embouts 40 et 44 ( figure 3) ont des structures symétriques permettant la fixation des tubulures 18 et 20 par rotation d'un quart de tour dans des sens opposés.The ends 40 and 44 (FIG. 3) have symmetrical structures allowing the tubes 18 and 20 to be fixed by rotation of a quarter of a turn in opposite directions.

Comme montré à la figure 2, la mise en place de la tubulure 18 s'effectue par rotation d'un quart de tour dans le sens anti-horaire, à partir d'une position d'introduction (représentée en trait fantôme), jusqu'à une position de verrouillage (représentée en trait plein). La fixation de la tubulure 20 s'effectue par rotation d'un quart de tour dans le sens horaire, à partir d'une position d'introduction (représentée en trait fantôme), jusqu'à une position de verrouillage (représentée en trait plein). Dans l'exemple représenté, les tubulures 18 et 20 s'étendent dans des directions sensiblement parallèles entre elles dans leur position de verrouillage.As shown in Figure 2, the establishment of the tubing 18 is effected by rotation of a quarter turn counterclockwise, from an insertion position (shown in phantom line), until 'in a locking position (shown in solid lines). The tubing 20 is fixed by rotating a quarter turn clockwise, from an insertion position (shown in phantom line), to a locking position (shown in solid line). ). In the example shown, the pipes 18 and 20 extend in directions substantially parallel to each other in their locked position.

La tubulure 18 avec son embase 38 et son embout de fixation est avantageusement formée par moulage d'une seule pièce à partir d'une matière plastique, par exemple du type polyamide. Il en est de même pour la tubulure 20 avec son embase 42 et son embout à baïonnette 44.The tubing 18 with its base 38 and its fixing tip is advantageously formed by molding in one piece from a plastic material, for example of the polyamide type. It is the same for the tubing 20 with its base 42 and its bayonet tip 44.

Les embases 38 et 42 sont conformées en fonction de l'espacement des ouvertures 14 et 16 et elles possèdent des moyens de blocage propres à coopérer mutuellement lorsque les embouts à baïonnette 40 et 44 sont tous deux en position de verrouillage, de manière à s'opposer au déverrouillage des deux embouts et, par conséquent, des deux tubulures.The bases 38 and 42 are shaped as a function of the spacing of the openings 14 and 16 and they have locking means capable of cooperating with each other when the bayonet ends 40 and 44 are both in the locking position, so as to oppose the unlocking of the two end pieces and, consequently, of the two pipes.

L'embout 40 de la tubulure 18 possède un axe de rotation XX et l'embase 38 correspondante est réalisée sous la forme d'une plaque plane de forme générale asymétrique qui s'étend perpendiculairement à l'axe XX. L'embase 38 a la forme générale d'un triangle limité par trois bords droits 46, 48 et 50. Les bords 46 et 50 sont réunis entre eux par un bord 52 en arc de cercle centré sur l'axe XX. Les bords 46 et 48 sont réunis entre eux par un bord 54 formant découpe servant par exemple à l'indexation sur le carter d'un moteur de véhicule. Enfin, les bords 48 et 50 sont réunis entre eux par un bord 56 en forme d'arc de cercle qui, dans la position de verrouillage de la tubulure 18, est centré sur l'axe de rotation X′X′ de la tubulure 20. Dans cette position de verrouillage, le bord 56 vient en butée contre l'embase 42 de la tubulure 20 qui possède une forme générale circulaire centré sur l'axe X′X′.The end piece 40 of the tube 18 has an axis of rotation XX and the corresponding base 38 is produced in the form of a flat plate of generally asymmetrical shape which extends perpendicularly to the axis XX. The base 38 has the general shape of a triangle limited by three straight edges 46, 48 and 50. The edges 46 and 50 are joined together by an edge 52 in an arc centered on the axis XX. The edges 46 and 48 are joined together by an edge 54 forming a cutout used for example for indexing on the casing of a vehicle engine. Finally, the edges 48 and 50 are joined together by an edge 56 in the form of an arc of a circle which, in the locking position of the tube 18, is centered on the axis of rotation X′X ′ of the tube 20 In this locking position, the edge 56 abuts against the base 42 of the tube 20 which has a generally circular shape centered on the axis X′X ′.

L'embase 38 est évidée sur une partie de son épaisseur pour former une voie de guidage 58 en forme d'arc de cercle (figures 2 à 4) qui, dans la position de verrouillage de la tubulure 18, est centrée sur l'axe X′X′.The base 38 is hollowed out over part of its thickness to form a guide track 58 in the form of an arc of a circle (FIGS. 2 to 4) which, in the locking position of the tube 18, is centered on the axis X′X ′.

La voie de guidage 58 part du bord 50 et aboutit à une portée de blocage 60 qui a la forme d'un bord droit s'étendant perpendiculairement au bord 50 de l'embase 38 et parallèlement à l'axe 26 de l'ouverture 16 (dans la position de verrouillage de la tubulure 18). La portée 60 se raccorde perpendiculairement avec un bord de butée 62 s'étendant parallèlement au bord 50 de l'embase 38 et aboutissant jusqu'au bord 56.The guide track 58 starts from the edge 50 and ends at a locking surface 60 which has the shape of a straight edge extending perpendicular to the edge 50 of the base 38 and parallel to the axis 26 of the opening 16 (in the locking position of the tubing 18). The bearing surface 60 is connected perpendicularly with an abutment edge 62 extending parallel to the edge 50 of the base 38 and ending up to the edge 56.

L'embase 42 de la tubulure 20 comprend une patte flexible 64 (figures 2 à 4) qui s'étend dans une direction non radiale par rapport à l'axe X′X′. La patte 64 se termine par une extrémité libre 66 destinée à coopérer avec la voie de guidage 58 et la portée de blocage 60 lorsque la tubulure 18 a été placée dans sa position de verrouillage.The base 42 of the tube 20 comprises a flexible tab 64 (Figures 2 to 4) which extends in a non-radial direction relative to the axis X′X ′. The tab 64 ends with a free end 66 intended to cooperate with the guide track 58 and the locking surface 60 when the tube 18 has been placed in its locking position.

Ainsi, conformément à l'invention, on met d'abord en place la tubulure 18 par introduction de l'embout 40 au travers de l'ouverture 14 et rotation d'un quart de tour dans le sens anti-horaire (flèche F sur la figure 2). On met ensuite en place la tubulure 20 en introduisant son embout 44 au travers de l'ouverture 16 et en le tournant d'un quart de tour dans le sens horaire, comme représenté par la flèche F′. Au cours de ce mouvement de rotation, l'extrémité libre 66 de la languette flexible 64 passe en force contre la voie de guidage 58 et vient, en fin de course, se loger dans la portée de blocage 60, tout en venant en butée contre le bord 62. Dans cette position, les tubulures 18 et 20 sont verrouillées et la coopération de la portée de blocage 60 et de la languette flexible 64 s'oppose à tout déverrouillage intempestif des deux tubulures 18 et 20.Thus, in accordance with the invention, the tubing 18 is first put in place by introduction of the end piece 40 through the opening 14 and rotation of a quarter turn anti-clockwise (arrow F on Figure 2). The tubing 20 is then put in place by inserting its end piece 44 through the opening 16 and by turning it a quarter turn clockwise, as shown by the arrow F ′. During this rotational movement, the free end 66 of the flexible tongue 64 passes in force against the guide track 58 and comes, at the end of the race, to be housed in the blocking surface 60, while coming into abutment against the edge 62. In this position, the pipes 18 and 20 are locked and the cooperation of the locking surface 60 and the flexible tongue 64 prevents any untimely unlocking of the two pipes 18 and 20.

Comme montré à la figure 6, chacune des embases, dans l'exemple l'embase 42, comprend une gorge annulaire 68 centrée sur l'axe de rotation de l'embout, c'est-à-dire l'axe X′X′ dans l'exemple. Cette gorge est destinée à loger un joint torique d'étanchéité 70 propre à être comprimé entre l'embase et le boîtier pour assurer ainsi une fixation étanche de la tubulure sur ce boîtier.As shown in Figure 6, each of the bases, in the example the base 42, comprises an annular groove 68 centered on the axis of rotation of the nozzle, that is to say the axis X′X ′ In the example. This groove is intended to accommodate an O-ring seal 70 capable of being compressed between the base and the housing to thereby ensure a tight attachment of the tubing on this housing.

On se réfère maintenant aux figures 7 et 8 pour décrire plus particulièrement la coopération de l'embout à baïonnette 44 avec l'ouverture correspondante 16 du boîtier, étant à noter que la configuration de l'embout 40 et de l'ouverture 14 sont symétriques.Reference is now made to FIGS. 7 and 8 to describe more particularly the cooperation of the bayonet fitting 44 with the corresponding opening 16 of the housing, it should be noted that the configuration of the fitting 40 and the opening 14 are symmetrical .

L'embout à baïonnette 44 (figure 8) comporte une bride de retenue 72 dont la forme est ajustée pour passer étroitement au travers de l'ouverture 14.The bayonet fitting 44 (FIG. 8) has a retaining flange 72, the shape of which is adjusted to pass closely through the opening 14.

La bride 72 est limitée par des bords 22′, 24′, 28′, 30′ et 32′ qui correspondent respectivement aux bords 22, 24, 28, 30 et 32 de l'ouverture 16. La bride 72 est rattachée à l'embase 42 par une section intermédiaire 74 qui apparaît en coupe sur la figure 8. La section 74 est limitée par deux bords opposés 76 et 78 en forme de quart de cercle centré sur l'axe X′X′ et possédant un rayon plus faible que les bords 30′ et 32′ de la bride 72. Les bords 76 et 78 sont réunis entre eux, d'un côté, par un bord droit 80 confondu en partie avec le bord 22′ et un autre bord droit 82 s'étendant parallèlement au bord 28′. Les bords 80 et 82 sont reliés entre eux par un bord coupé 84. De l'autre côté, les bords 76 et 78 sont reliés entre eux par un bord droit 86 en partie confondue avec le bord 24′ de la bride et un bord droit 88 qui s'étend perpendiculairement au bord 86 et qui se raccorde avec celui-ci par un petit bord 90 en forme d'arc de cercle.The flange 72 is limited by edges 22 ′, 24 ′, 28 ′, 30 ′ and 32 ′ which correspond respectively to the edges 22, 24, 28, 30 and 32 of the opening 16. The flange 72 is attached to the base 42 by an intermediate section 74 which appears in section in FIG. 8. The section 74 is limited by two opposite edges 76 and 78 in the form of a quarter of a circle centered on the axis X′X ′ and having a smaller radius than the edges 30 ′ and 32 ′ of the flange 72. The edges 76 and 78 are joined together, on one side, by a straight edge 80 coinciding in part with the edge 22 ′ and another straight edge 82 extending parallel at the edge 28 ′. The edges 80 and 82 are connected together by a cut edge 84. On the other side, the edges 76 and 78 are connected together by a straight edge 86 partly coincident with the edge 24 ′ of the flange and a straight edge 88 which extends perpendicularly to the edge 86 and which is connected with the latter by a small edge 90 in the form of an arc of a circle.

Après introduction de la bride 72 au travers de l'ouverture 16, dans la direction axiale XX′, l'embout est tourné d'un quart de tour dans la direction de la flèche F′ pour atteindre la position de verrouillage représentée en trait interrompu sur la figure 7. En fin de rotation, les bords 82 et 86 de la section 74 viennent en appui respectivement contre les bords 24′ et 22′ de l'ouverture 16 ce qui limite la rotation de l'embout.After introduction of the flange 72 through the opening 16, in the axial direction XX ′, the end piece is turned a quarter of a turn in the direction of the arrow F ′ to reach the locking position shown in broken lines in FIG. 7. At the end of rotation, the edges 82 and 86 of the section 74 come to bear respectively against the edges 24 ′ and 22 ′ of the opening 16 which limits the rotation of the end piece.

Bien entendu, l'invention n'est pas limitée aux modes de réalisations spécifiquement décrits et représentés sur les dessins. Elle s'étend également à d'autres variantes de réalisations.Of course, the invention is not limited to the embodiments specifically described and shown in the drawings. It also extends to other variant embodiments.

Ainsi, les tubulures peuvent s'adapter sur une même paroi d'un boîtier ou sur deux parois adjacentes formant un angle entre elles. Egalement, la fixation des tubulures peut se faire par d'autres types d'embouts à baïonnette, soit en rotation en sens opposé, comme dans l'exemple décrit, soit en rotation dans le même sens.Thus, the pipes can be fitted on the same wall of a housing or on two adjacent walls forming an angle between them. Also, the tubing can be fixed by other types of bayonet fittings, either rotating in the direction opposite, as in the example described, either rotating in the same direction.

Claims (9)

1. - Dispositif pour la fixation de deux tubulures (18,20) sur deux ouvertures voisines (14,16) d'un boîtier (10) d'échangeur de chaleur, caractérisé en ce que les ouvertures (14,16) possèdent une configuration de fixation à baïonnette, en ce que les tubulures (18,20) comportent respectivement des embouts à baïonnette (40,44) propres à être amenés en une position de verrouillage sur les ouvertures (14,16) et en ce que les deux embouts (40,44) sont munis d'embases (38,42) conformées en fonction de l'espacement des ouvertures (14,16) et possédant des moyens de blocage (58,60,64) propres à coopérer mutuellement lorsque les embouts sont tous deux dans la position de verrouillage. 1. - Device for fixing two pipes (18,20) on two adjacent openings (14,16) of a housing (10) of heat exchanger, characterized in that the openings (14,16) have a bayonet fixing configuration, in that the pipes (18,20) respectively comprise bayonet ends (40,44) suitable for being brought into a locking position on the openings (14,16) and in that both end caps (40,44) are provided with bases (38,42) shaped as a function of the spacing of the openings (14,16) and having locking means (58,60,64) capable of cooperating with each other when the end caps are both in the locked position. 2. - Dispositif selon la revendication 1, caractérisé en ce que les deux embouts à baïonnette (40,44) sont prévus pour être amenés en position de verrouillage dans leurs ouvertures respectives (14,16) par rotation d'une fraction de tour dans des sens opposés (F,F′). 2. - Device according to claim 1, characterized in that the two bayonet ends (40,44) are provided to be brought into the locking position in their respective openings (14,16) by rotation of a fraction of a turn in opposite directions (F, F ′). 3. - Dispositif selon l'une des revendications 1 et 2, caractérisé en ce que les deux embouts à baïonnette (40,44) sont prévus pour être amenés en position de verrouillage dans leurs ouvertures respectives (14,16) par rotation d'un quart de tour. 3. - Device according to one of claims 1 and 2, characterized in that the two bayonet ends (40,44) are provided to be brought into the locking position in their respective openings (14,16) by rotation of a quarter turn. 4. - Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que l'embase (38) de l'un (18) des embouts à baïonnette comporte une voie de guidage (58) en arc de cercle aboutissant à une portée de blocage (60) et en ce que l'embase (42) de l'autre embout à baïonnette (44) comporte une patte flexible (64) possédant une extrémité libre (66) qui, lors de la rotation de cet autre embout (44), est propre à passer en force contre la voie de guidage (58) et venir se loger dans la portée de blocage (60), le premier embout (18) étant déjà en position de verrouillage. 4. - Device according to one of claims 1 to 3, characterized in that the base (38) of one (18) of the bayonet fittings comprises a guide track (58) in a circular arc leading to a locking surface (60) and in that the base (42) of the other bayonet end piece (44) has a flexible tab (64) having a free end (66) which, when the other end piece rotates (44), is able to forcefully pass against the guide track (58) and come to be housed in the locking surface (60), the first end piece (18) already being in the locking position. 5. - Dispositif selon la revendication 4, caractérisé en ce que la patte flexible (64) est non radiale. 5. - Device according to claim 4, characterized in that the flexible tab (64) is non-radial. 6. - Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que les embases respectives (38,42) des deux embouts à baïonnette (40,44) comportent chacune une gorge (68) logeant un joint d'étanchéité (70) propre à être comprimé entre l'embase et le boîtier. 6. - Device according to one of claims 1 to 5, characterized in that the respective bases (38,42) of the two bayonet tips (40,44) each have a groove (68) housing a seal ( 70) suitable for being compressed between the base and the housing. 7. - Dispositif selon l'une des revendications 1 à 6, caractérisé en ce que l'une (38) des embases comporte une encoche d'indexation (54). 7. - Device according to one of claims 1 to 6, characterized in that one (38) of the bases comprises an indexing notch (54). 8. - Dispositif selon l'une des revendications 1 à 7, caractérisé en ce que chacune des tubulures (18,20) avec son embase (38,42) et son embout à baïonnette (40,44) est formée d'une seule pièce par moulage d'une matière plastique. 8. - Device according to one of claims 1 to 7, characterized in that each of the pipes (18,20) with its base (38,42) and its bayonet tip (40,44) is formed of a single part by molding a plastic material. 9. - Dispositif selon l'une des revendications 1 à 8, caractérisé en ce que chacune des tubulures (18,20) est coudée. 9. - Device according to one of claims 1 to 8, characterized in that each of the pipes (18,20) is bent.
EP92401660A 1991-06-19 1992-06-16 Apparatus for mounting two conduits on two neighbouring openings of a header of a heat-exchanger Withdrawn EP0519800A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9107543 1991-06-19
FR9107543A FR2678052B1 (en) 1991-06-19 1991-06-19 DEVICE FOR FIXING TWO TUBING ON TWO NEIGHBORHOOD OPENINGS OF A HEAT EXCHANGER HOUSING.

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EP0519800A1 true EP0519800A1 (en) 1992-12-23

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US (1) US5180005A (en)
EP (1) EP0519800A1 (en)
JP (1) JPH06185890A (en)
FR (1) FR2678052B1 (en)

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Also Published As

Publication number Publication date
US5180005A (en) 1993-01-19
JPH06185890A (en) 1994-07-08
FR2678052B1 (en) 1993-09-24
FR2678052A1 (en) 1992-12-24

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