FR2492033A1 - Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing - Google Patents

Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing Download PDF

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Publication number
FR2492033A1
FR2492033A1 FR8021682A FR8021682A FR2492033A1 FR 2492033 A1 FR2492033 A1 FR 2492033A1 FR 8021682 A FR8021682 A FR 8021682A FR 8021682 A FR8021682 A FR 8021682A FR 2492033 A1 FR2492033 A1 FR 2492033A1
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FR
France
Prior art keywords
cover
casing
seal
housing
sealing device
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Withdrawn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
FR8021682A
Other languages
French (fr)
Inventor
Jean-Michel Lamy
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.)
Renault SAS
Original Assignee
Renault 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 Renault SAS filed Critical Renault SAS
Priority to FR8021682A priority Critical patent/FR2492033A1/en
Priority to ES1981260696U priority patent/ES260696Y/en
Publication of FR2492033A1 publication Critical patent/FR2492033A1/en
Withdrawn legal-status Critical Current

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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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/029—Gearboxes; Mounting gearing therein characterised by means for sealing the gearboxes, e.g. to improve airtightness
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/031—Gearboxes; Mounting gearing therein characterised by covers or lids for gearboxes
    • 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
    • F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
    • F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02039—Gearboxes for particular applications
    • F16H2057/02043—Gearboxes for particular applications for vehicle transmissions

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

The watertight seal consists of a flexible '0' ring (12) which is inserted in a housing formed in the casing (10), e.g a gearbox. The casing may be in the as-cast condition requiring no machining. The cover (11) has a corresponding housing (16) formed by pressing. The housing is designed to have a width smaller than the diameter of the sealing ring in order to compress the latter on assembly. The amount of compressive force (F1,F2) is calculated as a function of the duty of the seal.

Description

Dispositif d'étanchéité pour formes quelconques.Sealing device for any shape.

La présente invention se rapporte à un dispositif d'étanchéité pour formes quelconques liant deux pièces fixes l'une par rapport à l'autre tel qu'un couvercle sur un carter.The present invention relates to a sealing device for any shape connecting two fixed parts with respect to each other such as a cover on a casing.

On connaît de nombreux dispositifs d'étanchéité de deux pièces fixes l'une par rapport à l'autre ; un des plus courants étant celui représenté à la figure i. Dans ce système un couvercle t est monté sur un carter 2.Many sealing devices are known for two pieces that are fixed relative to one another; one of the most common being that shown in Figure i. In this system a cover t is mounted on a casing 2.

Pour assurer l'étanchéité entre l'intérieur 3 du carter et l'extérieur 4, on interpose un joint plat 5 entre les deux pièces, ledit joint étant serré par les vis de fixation 6 du couvercle i sur le carter 2.To seal between the interior 3 of the housing and the exterior 4, a flat seal 5 is interposed between the two parts, said seal being tightened by the fixing screws 6 of the cover i on the housing 2.

De tels dispositifs exigent que les faces de contacts avec le joint plat soient très bien usinées afin d'avoir un très bon état de surface pour garantir une étanchéité acceptable. De plus, le joint se déforme dans le temps ; ce qui entraîne une modification de la tension des vis et éventuellement une baisse ou même une perte de ltétanchéité. Such devices require that the contact faces with the flat seal be very well machined in order to have a very good surface condition to guarantee an acceptable seal. In addition, the joint deforms over time; which causes a change in the tension of the screws and possibly a drop or even a loss of tightness.

Le but de la présente invention est donc de réaliser un dispositif d'étanchéité pour formes quelconques qui évite les inconvénients décrits précédemment, et qui permet d'assurer ltétanchéité correcte de deux pièces fixes l'une par rapport à l'autre sans exiger un usinage des faces en contact avec le joint.The object of the present invention is therefore to produce a sealing device for any shape which avoids the drawbacks described above, and which makes it possible to ensure the correct sealing of two fixed parts relative to one another without requiring machining. faces in contact with the joint.

A cet effet, l'invention a pour objet un dispositif d'étanchéité pour formes quelconques liant un couvercle à un carter, le couvercle et le carter étant fixes l'un par rapport à l'autre, et le joint torique pouvant épouser un contour quelconque délimité par le couvercle et le carter, qui déterminent un volume tel que le joint est comprimé dans un sens parallèle au plan de liaison du couvercle et du carter ; ce volume étant tel qu'il tienne compte des tolerances dimensionnelles des pieces et de l'evolution dimensionnelle du joint dans le temps ; le carter etant brut de fonderie, et le couvercle etant brut d'emboutissage.
Selon un mode de réalisation préféré de l'invention le volume recevant le joint a une section dont la largeur est telle qu'elle assure un serrage suivant un plan parallèle au plan de liaison du carter et du couvercle, et que la hauteur est telle que le joint est limité dans son extension.To this end, the subject of the invention is a sealing device for any shape connecting a cover to a casing, the cover and the casing being fixed relative to each other, and the O-ring being able to follow a contour. any delimited by the cover and the housing, which determine a volume such that the seal is compressed in a direction parallel to the connection plane of the cover and the housing; this volume being such that it takes account of the dimensional tolerances of the parts and the dimensional development of the joint over time; the casing being rough of foundry, and the cover being gross of stamping.
According to a preferred embodiment of the invention, the volume receiving the seal has a section whose width is such that it ensures a tightening along a plane parallel to the connection plane of the casing and the cover, and that the height is such that the joint is limited in its extension.

Selon un autre mode de réalisation préféré de l'invention le logement du joint a une section qui est munie dans sa partie haute opposée au plan de liaison, d'une partie faisant office de dégagement de sécurité pour éviter le coincement ; cette partie étant délimitée par une surface oblique du couvercle par rapport à la surface verticale dudit couvercle.According to another preferred embodiment of the invention, the housing of the seal has a section which is provided in its upper part opposite the connection plane, with a part serving as a safety release to prevent jamming; this part being delimited by an oblique surface of the cover with respect to the vertical surface of said cover.

Le dispositif d'étanchéité suivant l'invention présente ainsi l'avantage de ne pas exiger des états de surface usinés pour les faces en contact avec le joint ; de plus le joint, qui peut se déformer dans le temps, n'influence plus le serrage des vis de fixation du couvercle sur le carter.The sealing device according to the invention thus has the advantage of not requiring machined surface conditions for the faces in contact with the seal; more the seal, which can deform over time, no longer influences the tightening of the cover fixing screws on the housing.

D'autres caractéristiques et avantages de la présente invention ressortiront de la description qui suit de modes de réalisation donnée à titre d'exemple, en référence aux dessins annexés sur lesquels - la figure 2 est une coupe de la section du dispositif d'étanchéité
selon l'invention, - la figure 3 est une coupe de la section du dispositif d'étanchéité
avec la partie de dégagement de sécurité, - la figure 4 est une coupe identique à celle de la figure 3 avec la
section du joint schématisée, - la figure 5 est une vue d'ensemble en coupe d'un exemple d'applica
tion de l'invention.Other characteristics and advantages of the present invention will emerge from the following description of embodiments given by way of example, with reference to the appended drawings in which - Figure 2 is a section of the section of the sealing device
according to the invention, - Figure 3 is a section of the section of the sealing device
with the safety release part, - Figure 4 is a section identical to that of Figure 3 with the
joint section diagrammatically, - Figure 5 is an overall sectional view of an example of applica
tion of the invention.

Le dispositif d'étanchéité pour formes quelconques selon l'invention représenté sur la figure 2 comprend un carter 10, sur lequel vient se fixer un couvercle Il en emprisonnant un joint 12 à section cylindrique. Le couvercle Il est tenu sur le carter par des vis de fixation 13 schématisées sur la figure 2 par leur axe. Le joint 12 est d'abord glissé dans le carter 10 jusqu'à venir en butée sur la face 14 de liaison du carter avec le couvercle. Puis le couvercle il est monté à son tour, et vient coiffer le joint 12 en le contraignant dans un sens parallèle à la face de liaison du carter 10 et du couvercle 11. Le couvercle il est fixé sur le carter 10 par des vis 13.The sealing device for any shape according to the invention shown in Figure 2 comprises a housing 10, on which is fixed a cover II by trapping a seal 12 of cylindrical section. The cover It is held on the casing by fixing screws 13 shown diagrammatically in FIG. 2 by their axis. The seal 12 is first slid into the housing 10 until it abuts on the face 14 connecting the housing with the cover. Then the cover is mounted in turn, and covers the seal 12 by forcing it in a direction parallel to the connection face of the housing 10 and of the cover 11. The cover is fixed to the housing 10 by screws 13.

Le carter 10 a ses faces 14 et 15 brut de fonderie ; lesquelles faces servent d'appui au joint 12.The casing 10 has its faces 14 and 15 gross foundry; which faces serve to support the joint 12.

Le couvercle Il est brut d'emboutissage et sa face 16 qui est en contact avec le joint 12 ntest pas usinée. Le joint 12 est alors en butée permanente contre la face 14 du carter 10, et en compression sous l'action des forces F1 et F2 des faces 15 et 16. La largeur 1 du logement du joint est déterminée de façon à donner une compression suffisante audit joint 12 en tenant compte des tolérances dimensionnelles du carter 10, du couvercle Il et du joint 12 et de l'évolution des caractéristiques du joint 12 dans le temps.The cover It is crude stamping and its face 16 which is in contact with the seal 12 is not machined. The seal 12 is then in permanent abutment against the face 14 of the casing 10, and in compression under the action of the forces F1 and F2 of the faces 15 and 16. The width 1 of the seal housing is determined so as to give sufficient compression audit joint 12 taking into account the dimensional tolerances of the casing 10, of the cover II and of the joint 12 and of the development of the characteristics of the joint 12 over time.

Un autre mode de réalisation est représenté sur la figure 3. Comme - dans le cas précédent il y a un carter 20, un couvercle 21 et un joint 22 avec les mêmes caractéristiques que dans le cas de la figure 2.Another embodiment is shown in FIG. 3. As - in the previous case there is a casing 20, a cover 21 and a seal 22 with the same characteristics as in the case of FIG. 2.

Dans le cas présent le logement du joint est différent, car il possède dans sa partie haute une partie faisant office de dégagement de sécurité. Cette partie supplémentaire est donnée par une surface 23 du couvercle 21 ; cette surface 23 étant oblique par rapport à la surface verticale 24 dudit couvercle 21. Le joint 22 est monté de la même façon que précédemment. Le couvercle 21, lorsqu'il est en place, vient en butée contre le joint 22 à l'aide de sa face oblique 23. Le joint 22 est alors en butée permanente contre la face oblique 23 du couvercle 21 et contre la face 26 du carter 20 ; et en compression sous l'action des forces F1 et F2 des faces 24 et 25 du couvercle et du carter. In the present case the housing of the seal is different, because it has in its upper part a part which acts as a safety release. This additional part is given by a surface 23 of the cover 21; this surface 23 being oblique to the vertical surface 24 of said cover 21. The seal 22 is mounted in the same way as above. The cover 21, when in place, abuts against the seal 22 using its oblique face 23. The seal 22 is then in permanent abutment against the oblique face 23 of the cover 21 and against the face 26 of the housing 20; and in compression under the action of forces F1 and F2 of the faces 24 and 25 of the cover and of the casing.

La largeur 1 du logement du joint est déterminée de façon à donner une compression suffisante audit joint 22 en tenant compte des tolérances dimensionnelles du carter 20, du couvercle 21 et du joint 22 et de l'évolution des caractéristiques du joint dans le temps. Cette surface oblique 23 du couvercle 2i permet ainsi d'avoir un logement du joint avec une partie supérieure supplémentaire faisant office de dégagement de sécurité pour éviter le coincement du joint.The width 1 of the seal housing is determined so as to give sufficient compression to said seal 22 taking into account the dimensional tolerances of the casing 20, the cover 21 and the seal 22 and the evolution of the characteristics of the seal over time. This oblique surface 23 of the cover 2i thus makes it possible to have a housing for the seal with an additional upper part serving as a safety clearance to avoid jamming of the seal.

La figure 4 montre la section théorique du logement du joint avec une hauteur h et une largeur 1 de telle façon que si d est le diamètre de la section du joint l'on ait la relation

Figure img00040001
Figure 4 shows the theoretical section of the joint housing with a height h and a width 1 so that if d is the diameter of the joint section there is the relation
Figure img00040001

La figure 5 indique un exemple de réalisation du dispositif d'étanchéité selon l'invention. Dans cet exemple on a un carter de boîte de vitesses 30 sur lequel vient se monter un couvercle 31, en venant emprisonner un joint 32. FIG. 5 indicates an exemplary embodiment of the sealing device according to the invention. In this example, there is a gearbox casing 30 on which a cover 31 is mounted, by trapping a seal 32.

Claims (3)

REVENDICATIONS 1. Dispositif d'étanchéité pour formes quelconques liant un couvercle à un carter, le couvercle et le carter étant fixes l'un par rapport à l'autre, caractérisé en ce que le joint torique peut épouser un contour quelconque délimité par le couvercle et le carter qui déterminent un volume tel que le joint est comprimé dans un sens parallèle au plan de liaison du couvercle et du carter ; ce volume tant tel qu'il tienne compte des tolérances dimensionnelles des pièces et de l'évolution dimensionnelle du joint dans le temps ; le carter étant brut de fonderie, et le couvercle étant brut d'emboutissage.1. Sealing device for any shape connecting a cover to a casing, the cover and the casing being fixed relative to one another, characterized in that the O-ring can follow any contour delimited by the cover and the housing which determines a volume such that the seal is compressed in a direction parallel to the connection plane of the cover and the housing; this volume as long as it takes into account the dimensional tolerances of the parts and the dimensional evolution of the joint over time; the casing being gross of foundry, and the cover being gross of stamping. 2. Dispositif d'étanchéité selon la revendication 1 caractérisé en ce que le volume recevant le joint a une section dont la largeur est telle qu'elle assure un serrage suivant un plan parallèle au plan de liaison du carter et du couvercle, et que la hauteur est telle que le joint est limité dans son extension.2. Sealing device according to claim 1 characterized in that the volume receiving the seal has a section whose width is such that it ensures a tightening in a plane parallel to the connecting plane of the housing and the cover, and that the height is such that the joint is limited in its extension. 3. Dispositif d'étanchéité selon la revendication 1 caractérisé en ce que le logement du joint a une section, qui est munie dans sa partie haute opposée au plan de liaison, d'une partie faisant office de dégagement de sécurité pour éviter le coincement ; cette partie étant délimitée par une surface oblique (23) du couvercle (21) par rapport à la surface verticale (24) dudit couvercle (21). 3. Sealing device according to claim 1 characterized in that the housing of the seal has a section, which is provided in its upper part opposite the connecting plane, with a part acting as a safety release to avoid jamming; this part being delimited by an oblique surface (23) of the cover (21) relative to the vertical surface (24) of said cover (21).
FR8021682A 1980-10-10 1980-10-10 Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing Withdrawn FR2492033A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8021682A FR2492033A1 (en) 1980-10-10 1980-10-10 Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing
ES1981260696U ES260696Y (en) 1980-10-10 1981-10-09 SEALING DEVICE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8021682A FR2492033A1 (en) 1980-10-10 1980-10-10 Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing

Publications (1)

Publication Number Publication Date
FR2492033A1 true FR2492033A1 (en) 1982-04-16

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FR8021682A Withdrawn FR2492033A1 (en) 1980-10-10 1980-10-10 Watertight seal for gearbox casing - has flexible sealing ring compressed between body and cover of cast casing

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FR (1) FR2492033A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086229A1 (en) * 1981-08-27 1983-08-24 Motorola Inc Improved moisture and dust seal arrangement for a portable radio or the like.
EP0192316A1 (en) * 1985-01-10 1986-08-27 Ford Motor Company Limited Automotive component cover
FR2805019A1 (en) * 2000-02-10 2001-08-17 Peugeot Citroen Automobiles Sa MANUAL GEARBOX FOR MOTOR VEHICLE
DE102012010789A1 (en) * 2012-06-01 2013-12-05 Sew-Eurodrive Gmbh & Co Kg Gear box, has projections formed on side surface of portion that is turned towards another portion, where housing portions are provided with intermediate seal that is centered and/or positioned by projections and spacing domes
CN117704037A (en) * 2024-02-05 2024-03-15 中国核动力研究设计院 Supercritical carbon dioxide zero-leakage dry gas sealing device and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144162A (en) * 1961-08-14 1964-08-11 Bethlehem Steel Corp Closure for a pressure vessel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3144162A (en) * 1961-08-14 1964-08-11 Bethlehem Steel Corp Closure for a pressure vessel

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0086229A1 (en) * 1981-08-27 1983-08-24 Motorola Inc Improved moisture and dust seal arrangement for a portable radio or the like.
EP0086229A4 (en) * 1981-08-27 1984-02-07 Motorola Inc Improved moisture and dust seal arrangement for a portable radio or the like.
EP0192316A1 (en) * 1985-01-10 1986-08-27 Ford Motor Company Limited Automotive component cover
FR2805019A1 (en) * 2000-02-10 2001-08-17 Peugeot Citroen Automobiles Sa MANUAL GEARBOX FOR MOTOR VEHICLE
EP1126196A1 (en) * 2000-02-10 2001-08-22 Peugeot Citroen Automobiles SA Housing for a manual automotive gearbox
DE102012010789A1 (en) * 2012-06-01 2013-12-05 Sew-Eurodrive Gmbh & Co Kg Gear box, has projections formed on side surface of portion that is turned towards another portion, where housing portions are provided with intermediate seal that is centered and/or positioned by projections and spacing domes
DE102012010789B4 (en) 2012-06-01 2021-09-16 Sew-Eurodrive Gmbh & Co Kg Transmission, comprising two housing parts with an intermediate seal
CN117704037A (en) * 2024-02-05 2024-03-15 中国核动力研究设计院 Supercritical carbon dioxide zero-leakage dry gas sealing device and method
CN117704037B (en) * 2024-02-05 2024-04-12 中国核动力研究设计院 Supercritical carbon dioxide zero-leakage dry gas sealing device and method

Also Published As

Publication number Publication date
ES260696Y (en) 1982-11-16
ES260696U (en) 1982-04-16

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