FR2618859A1 - Fixing a ring into a bore of a casing - Google Patents
Fixing a ring into a bore of a casing Download PDFInfo
- Publication number
- FR2618859A1 FR2618859A1 FR8711167A FR8711167A FR2618859A1 FR 2618859 A1 FR2618859 A1 FR 2618859A1 FR 8711167 A FR8711167 A FR 8711167A FR 8711167 A FR8711167 A FR 8711167A FR 2618859 A1 FR2618859 A1 FR 2618859A1
- Authority
- FR
- France
- Prior art keywords
- ring
- bore
- casing
- bellows
- fixed
- 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
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
- F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
- F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
-
- 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
- F16J15/50—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall
- F16J15/52—Sealings between relatively-movable members, by means of a sealing without relatively-moving surfaces, e.g. fluid-tight sealings for transmitting motion through a wall by means of sealing bellows or diaphragms
-
- 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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/77—Use of a shape-memory material
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
Abstract
Description
Lorsqu'un arbre est monté mobile dans un carter, par exemple un carter de direction, on prévoit généralement un soufflet qui entoure l'arbre et est fixé au carter.When a shaft is mounted movably in a casing, for example a steering casing, a bellows is generally provided which surrounds the shaft and is fixed to the casing.
La fixation du soufflet au carter peut se faire par I'intermédiaire d'une bague qui est fixée au soufflet et est elle-meme fixée à l'intérieur d'un alésage du carter. L'assemblage doit être étanche, pouvoir retenir une certaine quantité de graisse et résister a un effort axial d'arrachement.The fixing of the bellows to the casing can be done by means of a ring which is fixed to the bellows and is itself fixed inside a bore of the casing. The assembly must be tight, be able to retain a certain amount of grease and withstand an axial pulling force.
Si la fixation de la bague au soufflet ne pose pratiquement pas de problème, il n'en est pas de meme de sa fixation au carter. Les solutions connues jusqu'a présent nécessitent un alésage complexe et précis du carter qui doit avoir une face d'extrémité dressée et un alésage parfaitement cylindrique, un usinage précis de la bague, et une précision dans le montage de cette bague dans le carter.If the fixing of the ring to the bellows poses practically no problem, it is not the same for its fixing to the casing. The solutions known up to now require a complex and precise bore of the casing which must have an upright end face and a perfectly cylindrical bore, precise machining of the ring, and precision in the mounting of this ring in the casing.
La présente invention a pour objet un montage d'un soufflet a un carter par l'intermédiaire d'une bague, qui ne nécessite pas ces diverses précisions.The subject of the present invention is a mounting of a bellows to a casing by means of a ring, which does not require these various details.
Ce montage est caractérisé en ce que la bague présente une première partie cylindrique emmanchée a l'inte- rieur du carter et une deuxième partie cylindrique sur laquelle est fixé le soufflet et en ce qu'elle est en un alliage à mémoire de forme.This arrangement is characterized in that the ring has a first cylindrical part fitted inside the casing and a second cylindrical part on which the bellows is fixed and in that it is made of a shape memory alloy.
On sait qu'un alliage a mémoire de forme est un alliage, par exemple de nickel et de titane, qui se déforme plastiquement en dessous d'une température critique et reprend sa forme initiale des que sa température est supérieure a cette température critique.It is known that a shape memory alloy is an alloy, for example of nickel and titanium, which plastically deforms below a critical temperature and resumes its initial shape as soon as its temperature is above this critical temperature.
La présente invention a également pour objet un procédé de fixation à l'intérieur d'un alésage d'un carter d'une bague destinée à être fixée par ailleurs à un soufflet.The present invention also relates to a method of fixing inside a bore of a casing of a ring intended to be fixed elsewhere to a bellows.
Ce procédé est caractérisé en ce qu'on prévoit une bague en un alliage à mémoire de forme dont le diamètre est supérieur à celui de l'alésage, qu'on refroidit cette bague à une température inférieure à sa température critique, qu'on lui applique une contrainte de façon que, sur une partie au moins de sa longueur, elle ait un diamètre inférieur a celui de l'al- sage, et qu'on l'engage dans cet alésage. Lorsque, par la suite, la température de la bague s'élève soit naturellement, soit par un apport de calories, et atteint la température critique, elle tend à reprendre son diamètre initial et se trouve ainsi frettée à l'intérieur de l'alésage du carter, cet alésage pouvant ainsi rester nbrut de fonderie".This process is characterized in that a ring of a shape memory alloy is provided whose diameter is greater than that of the bore, that this ring is cooled to a temperature below its critical temperature, that it applies a constraint so that, over at least part of its length, it has a diameter smaller than that of the bore, and that it is engaged in this bore. When, subsequently, the temperature of the ring rises either naturally or by a supply of calories, and reaches the critical temperature, it tends to return to its initial diameter and is thus shrunk inside the bore of the casing, this bore can thus remain nbrut de fonderie ".
On a décrit ci-après, à titre d'exemple non limitatif, un mode de réalisation d'un montage selon l'invention, avec référence au dessin annexé dans lequel
La Figure 1 est une vue en coupe axiale;
Les Figures 2 à 5, sont des vues en coupe montrant
la fixation de la bague dans l'alésage d'un carter.An embodiment of an assembly according to the invention has been described below, by way of non-limiting example, with reference to the appended drawing in which
Figure 1 is an axial sectional view;
Figures 2 to 5 are sectional views showing
fixing the ring in the bore of a casing.
A la Figure 1, on voit le carter 1 dans lequel est monté mobile un arbre 2. Celui-ci est entouré par un soufflet 3 fixé au carter 1 par l'intermédiaire d'une bague 4.In FIG. 1, the casing 1 is seen in which a shaft 2 is movably mounted. The latter is surrounded by a bellows 3 fixed to the casing 1 by means of a ring 4.
Celle-ci-présente une partie cylindrique 4a sur laquelle le soufflet 3 est fixé par exemple par collage ou à l'aide d'un collier, et une partie cylindrique 4b, de diamètre plus faible, qui est frettée dans l'alésage la du carter 1.This has a cylindrical part 4a on which the bellows 3 is fixed for example by gluing or using a collar, and a cylindrical part 4b, of smaller diameter, which is hooped in the bore 1a of the housing 1.
La bague 4 est réalisée en un alliage à mémoire de forme, tel que celui connu dans le commerce spus le nom de "Tinel".The ring 4 is made of a shape memory alloy, such as that known in the trade spus the name of "Tinel".
Avant montage, la bague 4 présente sur toute sa longueur un même diamètre b qui est supérieur au diamètre de l'alésage du carter 1 (Figure 2). On refroidit la bague à une température inférieure à sa température critique et on lui applique une contrainte de façon que, sur une partie de sa longueur, son diamètre soit inferieur a celui de l'alésage du carter l (Pigure 3) et on l'engage dans cet alésage (Figure 4).Before mounting, the ring 4 has over its entire length the same diameter b which is greater than the diameter of the bore of the casing 1 (Figure 2). The ring is cooled to a temperature below its critical temperature and a stress is applied to it so that, over part of its length, its diameter is less than that of the bore of the casing l (Pigure 3) and it is engages in this bore (Figure 4).
Lorsque la température de la bague 4 s'élève, soit naturellement, soit gracie a un apport de calories, et qu'elle atteint la température critique, cette bague tend à reprendre son diamètre initial (Figure 5), ce qui assure son frettage dans l'alésage la du carter 1. When the temperature of ring 4 rises, either naturally or thanks to a supply of calories, and it reaches the critical temperature, this ring tends to return to its initial diameter (Figure 5), which ensures its shrinking in the bore 1 of the housing 1.
Quelle que soit la température d'utilisation, la bague 4 restera liée au carter 1 et ne pourra en être séparée que très difficilement. Le frettage assure l'étanchéité et la résistance à l'arrachement désirés.Whatever the temperature of use, the ring 4 will remain linked to the casing 1 and can only be separated therefrom with great difficulty. The hooping ensures the desired tightness and tear resistance.
Il va de soi que la présente invention ne doit pas entre considérée comme limitée au mode de réalisation décrit et représenté, mais en couvre, au contraire, toutes les variantes. It goes without saying that the present invention should not be regarded as being limited to the embodiment described and shown, but on the contrary covers all variants thereof.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8711167A FR2618859B1 (en) | 1987-07-31 | 1987-07-31 | FIXING A RING IN A BORING OF A CRANKCASE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8711167A FR2618859B1 (en) | 1987-07-31 | 1987-07-31 | FIXING A RING IN A BORING OF A CRANKCASE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2618859A1 true FR2618859A1 (en) | 1989-02-03 |
| FR2618859B1 FR2618859B1 (en) | 1989-10-20 |
Family
ID=9353941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8711167A Expired FR2618859B1 (en) | 1987-07-31 | 1987-07-31 | FIXING A RING IN A BORING OF A CRANKCASE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2618859B1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR915598A (en) * | 1944-07-27 | 1946-11-12 | Bendix Aviat Corp | Sealing device for universal joints |
| US3900939A (en) * | 1973-10-31 | 1975-08-26 | Combustion Eng | Method of plugging steam generator tubes |
| EP0142985A2 (en) * | 1983-11-15 | 1985-05-29 | RAYCHEM CORPORATION (a Delaware corporation) | Method for providing a tubular insert within an aperture |
| GB2158891A (en) * | 1984-05-19 | 1985-11-20 | Teves Gmbh Alfred | Sealing cap for sliding cylindrical parts |
-
1987
- 1987-07-31 FR FR8711167A patent/FR2618859B1/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR915598A (en) * | 1944-07-27 | 1946-11-12 | Bendix Aviat Corp | Sealing device for universal joints |
| US3900939A (en) * | 1973-10-31 | 1975-08-26 | Combustion Eng | Method of plugging steam generator tubes |
| EP0142985A2 (en) * | 1983-11-15 | 1985-05-29 | RAYCHEM CORPORATION (a Delaware corporation) | Method for providing a tubular insert within an aperture |
| GB2158891A (en) * | 1984-05-19 | 1985-11-20 | Teves Gmbh Alfred | Sealing cap for sliding cylindrical parts |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2618859B1 (en) | 1989-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |