FR2888711A1 - Electronic box sealing gasket for motor vehicle, has U-shaped section including asymmetrical wings, where section is adapted for covering end of lateral wall of electronic box base and for being pinched between cover of box and end - Google Patents
Electronic box sealing gasket for motor vehicle, has U-shaped section including asymmetrical wings, where section is adapted for covering end of lateral wall of electronic box base and for being pinched between cover of box and end Download PDFInfo
- Publication number
- FR2888711A1 FR2888711A1 FR0511293A FR0511293A FR2888711A1 FR 2888711 A1 FR2888711 A1 FR 2888711A1 FR 0511293 A FR0511293 A FR 0511293A FR 0511293 A FR0511293 A FR 0511293A FR 2888711 A1 FR2888711 A1 FR 2888711A1
- Authority
- FR
- France
- Prior art keywords
- seal
- base
- cover
- electronic box
- box
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/06—Hermetically-sealed casings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Mechanical Engineering (AREA)
- Gasket Seals (AREA)
Abstract
Description
La présente invention concerne un joint d'étanchéité pour un boîtierThe present invention relates to a seal for a housing
électronique. Plus particulièrement il s'agit d'un boîtier électronique destiné à être placé dans un véhicule automobile et à être associé à un bloc hydraulique (par exemple pour la commande d'un dispositif de freinage). electronic. More particularly it is an electronic box intended to be placed in a motor vehicle and to be associated with a hydraulic unit (for example for the control of a braking device).
Dans le domaine automobile, les boîtiers électroniques embarqués sur le véhicule doivent supporter des conditions d'utilisations sévères notamment en ce qui concerne la température, les vibrations, les chocs, l'étanchéité (à l'air, à l'eau, à la boue, à la neige, à la glace etc...). Ces boîtiers logent les différents composants électroniques et sont habituellement constitués d'une embase et d'un couvercle solidarisés l'un à l'autre et entre lesquels est disposé un joint d'étanchéité. In the automotive field, the electronic boxes on board the vehicle must withstand severe use conditions, particularly with regard to temperature, vibration, shock, airtightness, airtightness, mud, snow, ice etc ...). These housings house the various electronic components and usually consist of a base and a lid secured to one another and between which is disposed a seal.
Dans le cas, cependant, où la paroi de l'embase est mince (c'est à dire lorsque le boîtier est réalisé en aluminium), il a été constaté des difficultés de mise en place des joints d'étanchéité plats standards pouvant résister à des jets de pressions de fluide (par exemple assurer une étanchéité dite IPX9). En effet ces joints ont tendance à fluer sous la pression de fixation du couvercle à l'embase. Ce fluage entraîne un amincissement du joint au niveau de la zone de jonction entre le couvercle et l'embase et par la même des défauts d'étanchéité. In the case, however, where the wall of the base is thin (that is to say when the housing is made of aluminum), it has been noted difficulties in setting up standard flat seals that can withstand jets of fluid pressures (for example to ensure a seal called IPX9). Indeed, these seals tend to flow under the pressure of fixing the cover to the base. This creep causes a thinning of the seal at the junction zone between the cover and the base and by the same sealing defects.
Lorsque la paroi est trop mince pour recevoir de tels joints standards, il est connu de déposer à l'aide d'une machine appropriée un joint semi pâteux (de type CIPG - Cure ln Place -) sur l'extrémité de la paroi mince. Cependant cette technique de dépose de joint nécessite un investissement lourd et le niveau d'étanchéité atteint n'est pas optimum, surtout pour des boîtiers en aluminium. When the wall is too thin to receive such standard joints, it is known to deposit with a suitable machine a semi-pasty seal (CIPG type - Cure ln Place -) on the end of the thin wall. However, this seal removal technique requires a heavy investment and the level of tightness achieved is not optimal, especially for aluminum housings.
La présente invention a pour but de rendre étanche (IPX9) un boîtier aluminium à paroi mince sans nécessiter de coûts d'investissement importants. The present invention aims to seal (IPX9) a thin-walled aluminum housing without requiring significant investment costs.
A cet effet, la présente invention propose un joint d'étanchéité pour boîtier électronique du type comportant une embase et un couvercle, le dit joint étant caractérisé en ce qu'il présente une section en forme générale de U à ailes dissymétriques, adaptée pour recouvrir l'extrémité d'une paroi latérale de l'embase et pour être pincé entre un couvercle et cette extrémité d'embase. For this purpose, the present invention proposes a seal for an electronic box of the type comprising a base and a cover, the said seal being characterized in that it has a generally U-shaped section with asymmetrical wings, adapted to cover the end of a side wall of the base and to be clamped between a cover and this base end.
Selon un mode de réalisation avantageux, ce joint présente une aile de plus grande longueur que l'autre. Il présente ainsi une forme en U à ailes dissymétriques. Cette asymétrie permet de faciliter le placement du joint sur l'extrémité de la paroi latérale de l'embase, avant fermeture du couvercle. Ce type de joint assure un maintien plus ferme de la paroi (notamment grâce à un resserrement localisé de la section en U) et une bonne étanchéité du boîtier sous un faible encombrement. According to an advantageous embodiment, this seal has a wing of greater length than the other. It thus has a U-shape with asymmetrical wings. This asymmetry facilitates the placement of the seal on the end of the side wall of the base, before closing the lid. This type of seal ensures a more firm wall retention (in particular through a localized tightening of the U-section) and a good sealing of the housing in a small footprint.
Ce joint est réalisé en matière élastomère moulée. This seal is made of molded elastomeric material.
D'autres objets, caractéristiques et avantages de la présente invention ressortiront d'ailleurs de la description qui suit, à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels: La figure 1 est une vue schématique, en perspective, d'une embase de boîtier électronique munie d'un joint d'étanchéité selon la présente invention, La figure 2 est une vue schématique en coupe du joint selon la présente invention, et - La figure 3 est une vue schématique en coupe du joint selon la présente invention, mis en place entre une embase et un couvercle de boîtier électronique. Other objects, features and advantages of the present invention will become apparent from the following description, by way of non-limiting example, with reference to the accompanying drawings, in which: FIG. 1 is a diagrammatic perspective view of FIG. An electronic housing base provided with a seal according to the present invention. FIG. 2 is a schematic sectional view of the seal according to the present invention, and FIG. 3 is a diagrammatic sectional view of the seal according to the present invention. present invention, placed between a base and an electronic housing cover.
Selon le mode de réalisation représenté aux figures 1 à 3, un joint d'étanchéité selon l'invention est mis en place entre une embase 11 et un couvercle 12 constituant un boîtier électronique 13 (figure 3). On notera que sur la figure 1 le couvercle 12 du boîtier 13 n'est pas représenté. According to the embodiment shown in Figures 1 to 3, a seal according to the invention is placed between a base 11 and a cover 12 constituting an electronic housing 13 (Figure 3). Note that in Figure 1 the cover 12 of the housing 13 is not shown.
Le boîtier électronique représenté à la figure 1 est destiné à commander un ensemble de bobines d'électrovannes associé à un système de répartition de freinage pour véhicule automobile. Cependant la présente invention n'est pas limitée à l'étanchéisation de tels types de boîtiers. The electronic box shown in Figure 1 is intended to control a set of solenoid coils associated with a brake distribution system for a motor vehicle. However, the present invention is not limited to the sealing of such types of housings.
Le joint 10 selon la présente invention est un joint moulé, présentant une forme générale en U (figure 2). Les ailes 14 et 15 de ce U sont asymétriques et ne présentent pas la même longueur. The seal 10 according to the present invention is a molded joint, having a generally U-shaped (Figure 2). The wings 14 and 15 of this U are asymmetrical and do not have the same length.
Dans l'exemple représenté, le joint est mis en place à cheval sur l'extrémité 11 a de la paroi latérale de l'embase 11 (figure 3). Ce joint est ainsi adapté pour recouvrir l'extrémité 11 a de la paroi latérale de l'embase et pour être pincé entre un couvercle 12, et cette extrémité 11a d'embase. Cette extrémité 11a présente une très faible épaisseur. In the example shown, the seal is placed astride the end 11a of the side wall of the base 11 (Figure 3). This seal is thus adapted to cover the end 11a of the side wall of the base and to be clamped between a cover 12, and this base end 11a. This end 11a has a very small thickness.
Auparavant on plaçait à cet endroit un joint plat simplement pincé entre l'extrémité de l'embase 11 a et le couvercle 12. Ce joint plat avait tendance à fluer au moment du serrage du couvercle sur l'embase (qui est effectué par tout moyen approprié par exemple par vissage -). Lors de ce fluage l'épaisseur du joint plat diminuait ce qui rendait un tel joint impropre à assurer une bonne étanchéité du type IPX9. Previously there was placed at this location a flat seal simply pinched between the end of the base 11a and the cover 12. This flat seal had a tendency to flow when tightening the cover on the base (which is done by any means suitable for example by screwing -). During this creep the thickness of the flat gasket decreased which made such a seal unsuitable to ensure a good seal of the IPX9 type.
Selon la présente invention, l'utilisation d'un joint en U recouvrant l'extrémité 11a de l'embase de part et d'autre de cette extrémité empêche que le fluage de la partie de joint située entre le couvercle et l'embase ne provoque un amincissement favorisant un défaut d'étanchéité. En effet l'aile 14 du joint en U recouvre suffisamment la partie d'extrémité externe 11 a de l'embase pour empêcher toute introduction de fluide (même sous pression) à l'intérieur du boîtier. According to the present invention, the use of a U-shaped gasket covering the end 11a of the base on either side of this end prevents the creep of the part of the seal situated between the cover and the base causes a thinning promoting a lack of tightness. Indeed the wing 14 of the U-shaped seal sufficiently covers the outer end portion 11a of the base to prevent any introduction of fluid (even under pressure) inside the housing.
L'aile 15 du joint (de plus grande hauteur) est placée (dans l'exemple représenté) à l'intérieur du boîtier. Ceci facilite la mise en place du joint sur le boîtier. The wing 15 of the seal (of greater height) is placed (in the example shown) inside the casing. This facilitates the establishment of the seal on the housing.
On notera, en outre, que la partie interne 16 du joint d'étanchéité présente une section localement resserrée, favorisant le pincement du joint sur l'extrémité 11 a de la paroi d'embase. It will be noted, in addition, that the inner portion 16 of the seal has a locally constricted section, promoting the pinching of the seal on the end 11a of the base wall.
On notera également que les ailes 14 et 15 présentent des extrémités amincies afin d'une part, de pouvoir être démoulées plus facilement et d'autre part, pour ne pas être gênantes (en terme d'encombrement) lorsque le joint est monté La présente invention n'est pas limitée à la forme de réalisation représentée aux figures 1 à 3. Ainsi on pourrait très bien concevoir que la plus grande aile du joint soit disposée à l'extérieur du boîtier (pour le protéger davantage contre toute introduction de corps étranger à l'intérieur). Dans ce cas, bien entendu, l'aile 14 la plus courte serait placée à l'intérieur du boîtier. L'essentiel étant ici que le joint recouvre la zone de jonction entre l'embase et le couvercle de manière à assurer une étanchéité de cette zone. It will also be noted that the wings 14 and 15 have tapered ends so that they can be demolded more easily and secondly, so as not to be inconvenient (in terms of space requirement) when the seal is mounted. The invention is not limited to the embodiment shown in FIGS. 1 to 3. Thus one could very well conceive that the larger wing of the gasket is disposed outside the housing (to further protect it against any introduction of foreign body inside). In this case, of course, the shorter wing 14 would be placed inside the housing. The essential thing here is that the seal covers the junction zone between the base and the lid so as to seal this area.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0511293A FR2888711A1 (en) | 2005-11-07 | 2005-11-07 | Electronic box sealing gasket for motor vehicle, has U-shaped section including asymmetrical wings, where section is adapted for covering end of lateral wall of electronic box base and for being pinched between cover of box and end |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0511293A FR2888711A1 (en) | 2005-11-07 | 2005-11-07 | Electronic box sealing gasket for motor vehicle, has U-shaped section including asymmetrical wings, where section is adapted for covering end of lateral wall of electronic box base and for being pinched between cover of box and end |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2888711A1 true FR2888711A1 (en) | 2007-01-19 |
Family
ID=36992815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0511293A Pending FR2888711A1 (en) | 2005-11-07 | 2005-11-07 | Electronic box sealing gasket for motor vehicle, has U-shaped section including asymmetrical wings, where section is adapted for covering end of lateral wall of electronic box base and for being pinched between cover of box and end |
Country Status (1)
Country | Link |
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FR (1) | FR2888711A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7230164U (en) * | 1972-08-16 | 1972-11-02 | Gebr Merten | Sealing body for water-protected housing for the installation of electrical installation devices |
DE4306395A1 (en) * | 1992-03-14 | 1993-09-16 | Behr Gmbh & Co | Seal arrangement for housing flange |
US5678827A (en) * | 1996-05-03 | 1997-10-21 | Salco Products, Inc. | Tank car manway gasket |
EP0816177A2 (en) * | 1996-07-03 | 1998-01-07 | Sumitomo Wiring Systems, Ltd. | Electrical connection box for automotive vehicle |
-
2005
- 2005-11-07 FR FR0511293A patent/FR2888711A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE7230164U (en) * | 1972-08-16 | 1972-11-02 | Gebr Merten | Sealing body for water-protected housing for the installation of electrical installation devices |
DE4306395A1 (en) * | 1992-03-14 | 1993-09-16 | Behr Gmbh & Co | Seal arrangement for housing flange |
US5678827A (en) * | 1996-05-03 | 1997-10-21 | Salco Products, Inc. | Tank car manway gasket |
EP0816177A2 (en) * | 1996-07-03 | 1998-01-07 | Sumitomo Wiring Systems, Ltd. | Electrical connection box for automotive vehicle |
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