FR2848280A1 - Annular lip seal holder has deformable projecting portion on seal cavity that can be rolled or crimped to enclose seal - Google Patents
Annular lip seal holder has deformable projecting portion on seal cavity that can be rolled or crimped to enclose seal Download PDFInfo
- Publication number
- FR2848280A1 FR2848280A1 FR0215349A FR0215349A FR2848280A1 FR 2848280 A1 FR2848280 A1 FR 2848280A1 FR 0215349 A FR0215349 A FR 0215349A FR 0215349 A FR0215349 A FR 0215349A FR 2848280 A1 FR2848280 A1 FR 2848280A1
- Authority
- FR
- France
- Prior art keywords
- seal
- annular
- maintaining
- annular seal
- 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.)
- Granted
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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
- B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
-
- 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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
- F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
- Sealing Devices (AREA)
Abstract
Description
II
La présente invention concerne, de façon générale, un dispositif pour le maintien d'un joint annulaire d'étanchéité. Plus particulièrement, cette invention se rapporte au montage d'un joint annulaire intérieur fixe, à lèvre, dans un logement de forme correspondante ménagé sur un élément rigide de 5 support de ce joint. Encore plus particulièrement, l'invention s'intéresse au montage d'un joint à lèvre qui, dans une direction assistée hydraulique à crémaillère de véhicule automobile, doit être maintenu dans une bague-support montée à une extrémité d'un tube ou carter de direction, le joint s'appliquant contre la surface extérieure de la crémaillère à l'endroit o celle-ci sort du tube 10 ou carter de direction, pour se prolonger à l'extérieur jusqu'à un boîtier de rotule axiale, fixé à une extrémité de ladite crémaillère. The present invention relates, in general, to a device for holding an annular seal. More particularly, this invention relates to the mounting of a fixed internal annular seal, with a lip, in a housing of corresponding shape formed on a rigid support element for this seal. Still more particularly, the invention relates to the mounting of a lip seal which, in a hydraulic power assisted rack-and-pinion steering of a motor vehicle, must be held in a support ring mounted at one end of a tube or casing. steering, the seal pressing against the outer surface of the rack at the point where it comes out of the tube 10 or steering casing, to extend outside to an axial ball joint housing, fixed to a end of said rack.
Dans une direction assistée hydraulique à crémaillère, le tube ou carter de direction, dans lequel la crémaillère est montée coulissante, constitue un vérin hydraulique rempli d'huile, qui fournit la force d'assistance de la 15 direction. Il convient donc d'assurer une étanchéité efficace au point de sortie de la crémaillère, qui se prolonge à l'extérieur du tube ou carter de direction, jusqu'à la rotule axiale par laquelle est accouplée la biellette de direction. In a hydraulic rack-and-pinion power steering, the steering tube or housing, in which the rack is slidably mounted, constitutes a hydraulic cylinder filled with oil, which provides the steering assistance force. It is therefore necessary to ensure an effective seal at the point of exit from the rack, which extends outside the tube or steering casing, up to the axial ball joint by which the steering rod is coupled.
De manière habituelle, le tube ou carter de direction est fermé, à son extrémité, par une bague-support fixe, traversée axialement et de façon 20 coulissante par la crémaillère, un joint annulaire d'étanchéité à lèvre étant associé à cette bague-support et appliqué contre la surface extérieure de la crémaillère. Il convient, dans tous les cas, d'assurer le maintien en position du joint. Ce maintien est habituellement réalisé au moyen d'une bague supplémentaire, qui en général est une bague de guidage en matière plastique, 25 ou une bague d'arrêt dans le cas particulier d'un joint placé du côté intérieur de la bague-support et tenu en place par la pression hydraulique. Il en résulte une certaine complexité de structure et de montage. Usually, the steering tube or casing is closed at its end by a fixed support ring, axially traversed and slidingly by the rack, an annular lip seal being associated with this support ring and applied against the outer surface of the rack. In all cases, it is necessary to maintain the seal in position. This retention is usually achieved by means of an additional ring, which in general is a plastic guide ring, or a stop ring in the particular case of a seal placed on the inner side of the support ring and held in place by hydraulic pressure. This results in a certain complexity of structure and assembly.
La présente invention vise à éviter ces inconvénients, en fournissant, pour le maintien de ce genre de joint d'étanchéité, une solution qui 30 supprime toute bague additionnelle, tout en réduisant le nombre de pièces et en permettant un fonctionnement amélioré du joint d'étanchéité. The present invention aims to avoid these drawbacks, by providing, for the maintenance of this type of seal, a solution which eliminates any additional ring, while reducing the number of parts and allowing improved operation of the seal. seal.
A cet effet, l'invention a pour objet un dispositif pour le maintien d'un joint annulaire d'étanchéité, en particulier un joint annulaire intérieur fixe, à lèvre, dans un logement de forme correspondante ménagé sur un élément 35 rigide de support de ce joint, le dispositif étant essentiellement caractérisé par le fait que le joint annulaire d'étanchéité est maintenu dans le logement de l'élément rigide par déformation locale de la matière dudit élément rigide. To this end, the subject of the invention is a device for holding an annular seal, in particular a fixed internal annular seal, with a lip, in a housing of corresponding shape formed on a rigid support element. this seal, the device being essentially characterized in that the annular seal is held in the housing of the rigid element by local deformation of the material of said rigid element.
Ainsi, l'idée à la base de l'invention consiste à prévoir, sur l'élément rigide de support du joint annulaire d'étanchéité, une zone déformable qui, 5 avant déformation, permet la mise en place du joint dans son logement et, après déformation, assure la retenue du joint dans ce logement. Dans la mesure o cette zone déformable fait partie intégrante de l'élément de support, tout élément additionnel tel que bague devient superflu, et l'on supprime aussi l'opération de montage de cet élément additionnel. De plus, la zone déformable 10 de l'élément de support peut être appliquée sur le joint de manière à exercer sur celui-ci une certaine pression, de sorte que la retenue du joint est réalisée avec suppression de tout jeu indésirable. Thus, the idea underlying the invention consists in providing, on the rigid support element of the annular seal, a deformable zone which, before deformation, allows the seal to be put in place and , after deformation, ensures the retention of the seal in this housing. Insofar as this deformable zone is an integral part of the support element, any additional element such as a ring becomes superfluous, and the mounting operation of this additional element is also eliminated. In addition, the deformable zone 10 of the support element can be applied to the joint so as to exert a certain pressure on the latter, so that the retention of the joint is carried out with the elimination of any undesirable play.
Dans une forme de réalisation préférée de ce dispositif pour le maintien d'un joint annulaire d'étanchéité, la zone déformable de l'élément 15 rigide de support du joint comporte une zone annulaire, formée en saillie sur cet élément rigide autour du débouché du logement dudit joint, et prévue pour être rabattue vers l'intérieur, c'est-à-dire en direction de l'axe central de l'élément rigide, de manière à obturer au moins partiellement le débouché du logement du joint, en emprisonnant ainsi ce joint. Le rabattement de la zone 20 annulaire ainsi déformable est réalisable par roulage, ou par sertissage, à l'aide d'un outillage adapté. In a preferred embodiment of this device for maintaining an annular seal, the deformable zone of the rigid element for supporting the seal comprises an annular zone, projecting from this rigid element around the outlet of the housing of said seal, and designed to be folded inwards, that is to say towards the central axis of the rigid element, so as to at least partially close the outlet of the seal housing, by trapping so this joint. The folding of the annular zone 20 thus deformable can be carried out by rolling, or by crimping, using a suitable tool.
Avantageusement, la zone annulaire possède une partie facilitant la déformation. En particulier, la zone annulaire peut être raccordée au restant de l'élément de l'élément rigide de support du joint par l'intermédiaire d'une 25 partie annulaire d'épaisseur réduite, qui forme une "charnière" facilitant la déformation de ladite zone annulaire. Advantageously, the annular zone has a part facilitating the deformation. In particular, the annular zone can be connected to the remainder of the element of the rigid element for supporting the seal by means of an annular part of reduced thickness, which forms a "hinge" facilitating the deformation of said annular area.
Dans l'application préférentielle de l'invention à une direction assistée hydraulique à crémaillère de véhicule automobile, l'élément rigide de support du joint annulaire est une bague-support fixée au tube ou carter de 30 direction, à l'une de ses extrémités, et traversée axialement et de façon coulissante par la crémaillère, le joint annulaire étant maintenu par une zone déformée de la bague-support, et étant appliqué contre la surface extérieure de la crémaillère. In the preferred application of the invention to a hydraulic power assisted rack-and-pinion steering of a motor vehicle, the rigid element for supporting the annular seal is a support ring fixed to the steering tube or casing, at one of its ends. , and traversed axially and in a sliding manner by the rack, the annular seal being held by a deformed zone of the support ring, and being applied against the external surface of the rack.
De toute façon, l'invention sera mieux comprise à l'aide de la 35 description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple, une forme d'exécution de ce dispositif pour le maintien d'un joint annulaire d'étanchéité, appliqué à une direction assistée hydraulique à crémaillère de véhicule automobile. In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing showing, by way of example, an embodiment of this device for maintaining a seal. sealing ring, applied to a hydraulic power steering rack of a motor vehicle.
Figure 1 est une vue en demi-coupe d'un dispositif conforme à la présente invention, avant déformation de sa zone déformable; Figure 2 est une vue similaire à la figure 1, mais après déformation de cette zone. Figure 1 is a half-sectional view of a device according to the present invention, before deformation of its deformable zone; Figure 2 is a view similar to Figure 1, but after deformation of this area.
Les figures représentent, partiellement, une direction assistée hydraulique à crémaillère de véhicule automobile; elles montrent, plus particulièrement, la région d'extrémité d'un tube ou carter de direction 2, dont 10 l'axe central est indiqué en 3. La crémaillère 4 est montée coulissante, suivant l'axe 3, à l'intérieur du tube ou carter 2. L'extrémité de ce tube ou carter 2 porte une bague-support fixe 5, traversée axialement et de façon coulissante par la crémaillère 4. L'extrémité extérieure de la crémaillère 4 porte un boîtier de rotule axiale 6, par lequel est accouplée de façon comme en soi une biellette 15 de direction (non représentée). The figures show, partially, a hydraulic power steering rack of a motor vehicle; they show, more particularly, the end region of a steering tube or casing 2, the central axis of which is indicated at 3. The rack 4 is slidably mounted, along the axis 3, inside the tube or casing 2. The end of this tube or casing 2 carries a fixed support ring 5, traversed axially and slidingly by the rack 4. The outer end of the rack 4 carries an axial ball joint housing 6, by which is coupled so as in itself a steering rod 15 (not shown).
La bague-support 5 possède, à son extrémité tournée vers l'extérieur, c'est-à-dire faisant face au boîtier de rotule axiale 6, un logement annulaire 7, ouvert vers l'extérieur. Le logement annulaire 7 reçoit un joint annulaire intérieur fixe 8, qui est un joint à lèvre s'appliquant contre la surface 20 extérieure lisse 9 de la crémaillère 4. Le joint annulaire 8 assure ainsi une étanchéité vis-à-vis d'une chambre intérieure 10 remplie d'huile, délimitée par le tube ou carter 2 et par la bague-support 5, la chambre 10 constituant un élément du vérin hydraulique d'assistance formé ici par le tube ou carter 2. The support ring 5 has, at its end facing outwards, that is to say facing the axial ball joint housing 6, an annular housing 7, open towards the outside. The annular housing 7 receives a fixed inner annular seal 8, which is a lip seal applying against the smooth outer surface 9 of the rack 4. The annular seal 8 thus provides a seal against a chamber inner 10 filled with oil, delimited by the tube or casing 2 and by the support ring 5, the chamber 10 constituting an element of the hydraulic assistance cylinder formed here by the tube or casing 2.
La présente invention s'intéresse, plus particulièrement, au 25 maintien en place du joint annulaire d'étanchéité 8 dans son logement annulaire 7. The present invention is more particularly concerned with holding the annular seal 8 in place in its annular housing 7.
A cet effet, la bague-support 5 comporte sur sa face terminale, c'est-àdire en regard du boîtier de rotule axiale 6, une zone annulaire en saillie 11, relativement mince, qui s'étend tout autour du débouché du logement 30 annulaire 7. La zone annulaire 11 se rattache au restant de la bague-support 5 par une partie annulaire 12 qui peut posséder une épaisseur réduite, et qui peut former alors une sorte que charnière. La figure 1 montre la zone annulaire 11 dans sa configuration initiale, c'est-à-dire avant déformation. Cette zone annulaire 11 s'étend alors parallèlement à l'axe central 3, dans le prolongement 35 de la paroi latérale cylindrique du logement annulaire 7, une fente annulaire 13 séparant la zone annulaire 11 de la région frontale de la bague-support 5. To this end, the support ring 5 has on its end face, that is to say facing the axial ball joint housing 6, a relatively thin projecting annular zone 11 which extends all around the outlet of the housing 30 annular 7. The annular zone 11 is connected to the remainder of the support ring 5 by an annular part 12 which can have a reduced thickness, and which can then form a sort of hinge. FIG. 1 shows the annular zone 11 in its initial configuration, that is to say before deformation. This annular zone 11 then extends parallel to the central axis 3, in the extension 35 of the cylindrical side wall of the annular housing 7, an annular slot 13 separating the annular zone 11 from the front region of the support ring 5.
Comme cela se conçoit aisément, cette configuration initiale permet une mise en place aisée du joint annulaire 8 dans son logement 7. As is easily conceivable, this initial configuration allows easy installation of the annular seal 8 in its housing 7.
Ensuite, comme le montre la figure 2, la zone annulaire 11 est déformée, par roulage ou sertissage, de manière à être rabattue en direction 5 de l'axe central 3, comme indiqué par une flèche F. Après déformation, la zone annulaire 11 se trouve amenée dans un plan perpendiculaire à l'axe central 3, de manière à obturer partiellement le logement annulaire 7, sur son côté tourné vers l'extérieur, c'est-à-dire vers le boîtier de rotule axiale 6. Le joint annulaire 8 se retrouve ainsi emprisonné dans le logement annulaire 7. Then, as shown in FIG. 2, the annular zone 11 is deformed, by rolling or crimping, so as to be folded down in the direction 5 of the central axis 3, as indicated by an arrow F. After deformation, the annular zone 11 is brought in a plane perpendicular to the central axis 3, so as to partially seal the annular housing 7, on its side facing outward, that is to say towards the axial ball joint housing 6. The seal annular 8 is thus trapped in the annular housing 7.
Comme il va de soi, l'invention ne se limite pas à la seule forme d'exécution de ce dispositif pour le maintien d'un joint annulaire d'étanchéité qui a été décrite ci-dessus, à titre d'exemple; elle en embrasse, au contraire, toutes les variantes de réalisation et d'application respectant le même principe, quels que soient notamment: les formes de détail de la zone déformable de la bague-support, ou autre élément de support analogue, cette zone pouvant être unique et continue, ou multiple et discontinue; - le procédé et l'outillage mis en oeuvre pour déformer ladite zone; - le domaine d'application de ce dispositif, qui n'est pas limité aux 20 directions assistées hydrauliques des véhicules automobiles, mais s'étend à toutes configurations analogues, notamment du genre vérin. It goes without saying that the invention is not limited to the sole embodiment of this device for maintaining an annular seal which has been described above, by way of example; on the contrary, it embraces all the variant embodiments and applications respecting the same principle, whatever in particular: the forms of detail of the deformable zone of the support ring, or other similar support element, this zone possibly be single and continuous, or multiple and discontinuous; - the process and the tools used to deform said zone; - The field of application of this device, which is not limited to the 20 hydraulic power steering systems of motor vehicles, but extends to all similar configurations, in particular of the jack type.
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0215349A FR2848280B1 (en) | 2002-12-05 | 2002-12-05 | DEVICE FOR MAINTAINING AN ANNULAR JOINT SEAL |
DE2003156594 DE10356594B4 (en) | 2002-12-05 | 2003-12-04 | Device for holding an annular seal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0215349A FR2848280B1 (en) | 2002-12-05 | 2002-12-05 | DEVICE FOR MAINTAINING AN ANNULAR JOINT SEAL |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2848280A1 true FR2848280A1 (en) | 2004-06-11 |
FR2848280B1 FR2848280B1 (en) | 2005-02-04 |
Family
ID=32320011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR0215349A Expired - Fee Related FR2848280B1 (en) | 2002-12-05 | 2002-12-05 | DEVICE FOR MAINTAINING AN ANNULAR JOINT SEAL |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE10356594B4 (en) |
FR (1) | FR2848280B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2246237A1 (en) | 2009-04-29 | 2010-11-03 | Cie Automotive, S.A. | Power steering for vehicles |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB613460A (en) * | 1946-03-21 | 1948-11-29 | Trist & Co Ltd Ronald | Improvements relating to oil seals or the like |
GB884988A (en) * | 1959-07-16 | 1961-12-20 | Garlock Inc | Sealing device between relatively movable machine elements |
WO1982003574A1 (en) * | 1981-04-13 | 1982-10-28 | Stroemberg Jan | Method of effecting bending |
EP0394025A1 (en) * | 1989-04-19 | 1990-10-24 | Dowty Seals Limited | Annular seals |
US5855375A (en) * | 1997-05-12 | 1999-01-05 | General Motors Corporation | Seal for steering assist fluid motor |
DE20101327U1 (en) * | 2001-01-25 | 2002-06-06 | Bruss Dichtungstechnik | sealing arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1115535B (en) * | 1954-03-12 | 1961-10-19 | Fichtel & Sachs Ag | End cover for hydraulic telescopic shock absorber cylinder |
GB1111565A (en) * | 1964-10-06 | 1968-05-01 | Hydrosteer Ltd | Improvements in steering mechanism |
ZA724366B (en) * | 1971-07-02 | 1973-03-28 | Girling Ltd | Permanent assemblies including thermoplastic components and method of assembly |
DE19630299A1 (en) * | 1996-07-26 | 1998-01-29 | Zahnradfabrik Friedrichshafen | Rack and pinion steering device for motor vehicles |
US6176343B1 (en) * | 1997-12-15 | 2001-01-23 | Trw Inc. | Vehicle steering apparatus |
-
2002
- 2002-12-05 FR FR0215349A patent/FR2848280B1/en not_active Expired - Fee Related
-
2003
- 2003-12-04 DE DE2003156594 patent/DE10356594B4/en not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB613460A (en) * | 1946-03-21 | 1948-11-29 | Trist & Co Ltd Ronald | Improvements relating to oil seals or the like |
GB884988A (en) * | 1959-07-16 | 1961-12-20 | Garlock Inc | Sealing device between relatively movable machine elements |
WO1982003574A1 (en) * | 1981-04-13 | 1982-10-28 | Stroemberg Jan | Method of effecting bending |
EP0394025A1 (en) * | 1989-04-19 | 1990-10-24 | Dowty Seals Limited | Annular seals |
US5855375A (en) * | 1997-05-12 | 1999-01-05 | General Motors Corporation | Seal for steering assist fluid motor |
DE20101327U1 (en) * | 2001-01-25 | 2002-06-06 | Bruss Dichtungstechnik | sealing arrangement |
Also Published As
Publication number | Publication date |
---|---|
DE10356594B4 (en) | 2010-05-12 |
DE10356594A1 (en) | 2005-07-14 |
FR2848280B1 (en) | 2005-02-04 |
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Legal Events
Date | Code | Title | Description |
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ST | Notification of lapse |
Effective date: 20140829 |