FR2710375A1 - Fastening device using nut and spacer piece, and pipe connection using this device - Google Patents

Fastening device using nut and spacer piece, and pipe connection using this device Download PDF

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Publication number
FR2710375A1
FR2710375A1 FR9311324A FR9311324A FR2710375A1 FR 2710375 A1 FR2710375 A1 FR 2710375A1 FR 9311324 A FR9311324 A FR 9311324A FR 9311324 A FR9311324 A FR 9311324A FR 2710375 A1 FR2710375 A1 FR 2710375A1
Authority
FR
France
Prior art keywords
nut
spacer
washer
flanges
auxiliary part
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
Application number
FR9311324A
Other languages
French (fr)
Other versions
FR2710375B1 (en
Inventor
Huon Daniel
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen 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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Priority to FR9311324A priority Critical patent/FR2710375B1/en
Publication of FR2710375A1 publication Critical patent/FR2710375A1/en
Application granted granted Critical
Publication of FR2710375B1 publication Critical patent/FR2710375B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L23/00—Flanged joints
    • F16L23/02—Flanged joints the flanges being connected by members tensioned axially
    • F16L23/032—Flanged joints the flanges being connected by members tensioned axially characterised by the shape or composition of the flanges

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Connection Of Plates (AREA)

Abstract

The device includes, for fastening a member 4 by means of a threaded rod 8 passing through it, a nut 11, and a spacer piece 14 consisting, for example, of a spring, as well as an interposed washer 15. According to the invention, the device further includes an auxiliary component 20 for preassembling with the nut, the spacer piece and the washer, the latter being axially secured to the nut. This device applies in particular to the flanges for joining exhaust pipes together for combustion engines.

Description

L'invention est relative à un dispositif de fixation par écrou et entretoise, notamment pour bride de conduit d'échappement. The invention relates to a fixing device using a nut and spacer, in particular for an exhaust duct flange.

La fixation d'un organe au moyen d'un écrou vissé sur une tige filetée nécessite parfois l'interposition d'une entretoise entourant la tige entre l'écrou et l'organe. Cette entretoise est généralement un ressort hélicoïdal lorsque l'organe est une bride de raccordement de deux conduits, par exemple pour les gaz d'échappement d'un moteur à combustion de véhicule automobile. Une rondelle est de plus interposée entre l'écrou et l'entretoise et parfois également entre celle-ci et l'organe. II en résulte une opération de montage relativement longue et délicate pour réaliser la fixation de l'organe, en particulier si la tige filetée doit être immobilisée manuellement, au moins au début de cette opération. The fixing of an organ by means of a nut screwed onto a threaded rod sometimes requires the interposition of a spacer surrounding the rod between the nut and the organ. This spacer is generally a helical spring when the member is a connection flange of two conduits, for example for the exhaust gases of a combustion engine of a motor vehicle. A washer is moreover interposed between the nut and the spacer and sometimes also between the latter and the member. This results in a relatively long and delicate mounting operation for carrying out the attachment of the member, in particular if the threaded rod must be immobilized manually, at least at the start of this operation.

L'invention a pour but de pallier cet inconvénient, particulièrement notable dans le cas du montage en grande série de conduits d'échappement de véhicules automobiles. Elle conceme à cet effet un dispositif de fixation du type susmentionné caractérisé en ce qu'il comporte une pièce auxiliaire de préassemblage de l'écrou avec l'entretoise et la rondelle interposée, celle-d étant axialement solidaire de l'écrou. The object of the invention is to overcome this drawback, which is particularly notable in the case of assembly in large series of exhaust ducts for motor vehicles. To this end, it relates to a fixing device of the aforementioned type, characterized in that it comprises an auxiliary part for preassembly of the nut with the spacer and the interposed washer, the latter being axially integral with the nut.

Selon quelques caractéristiques intéressantes de l'invention,
- la pièce auxiliaire entoure au moins partiellement l'entretoise et présente deux rebords intérieurs d'extrémité butant axialement l'un sur la rondelle solidaire de l'écrou, et l'autre sur la face de l'entretoise éloignée de l'écrou ou sur une seconde rondelle appliquée sur cette face;
- la pièce auxiliaire est métallique et tubulaire, et l'un des rebords est réalisé par sertissage après pré-assemblage;
- la pièce auxiliaire est métallique et comporte au moins trois pattes qui s'étendent axialement de manière à entourer partiellement l'entretoise et qui présentent une extrémité libre repliée constituant, pour l'ensemble des pattes,
I'un des susdits rebords;
- la pièce forme une enveloppe en matière plastique et'ou destructible à la chaleur. According to some interesting features of the invention,
- the auxiliary part at least partially surrounds the spacer and has two internal end flanges axially abutting one on the washer integral with the nut, and the other on the face of the spacer remote from the nut, or on a second washer applied to this face;
- The auxiliary part is metallic and tubular, and one of the flanges is produced by crimping after pre-assembly;
the auxiliary part is metallic and comprises at least three tabs which extend axially so as to partially surround the spacer and which have a folded free end constituting, for all the tabs,
One of the above edges;
- the part forms a plastic envelope and 'or destructible to heat.

Deux modes de réalisation d'un dispositif de fixation selon l'invention sont décrits ci-après, avec référence aux dessins annexés parmi lesquels:
la figure 1 représente en coupe axiale partielle un raccordement de deux conduits équipé du dispositif selon un premier mode de réalisation;
la figure 2 est une vue de dessus de la pièce auxiliaire du dispositif de la figure 1;
et la figure 3 est une vue en perspective d'une pièce auxiliaire selon un second mode de réalisation.Two embodiments of a fixing device according to the invention are described below, with reference to the accompanying drawings, among which:
Figure 1 shows in partial axial section a connection of two conduits equipped with the device according to a first embodiment;
Figure 2 is a top view of the auxiliary part of the device of Figure 1;
and Figure 3 is a perspective view of an auxiliary part according to a second embodiment.

On voit à la figure îles extrémités juxtaposées de deux conduits 1, 2 respectivement solidaires de brides 3, 4 mises en appui sur un siège annulaire 5 par deux dispositifs de fixation 6 diamétralement opposés dont un seul est représenté. We see in the figure the juxtaposed ends of two conduits 1, 2 respectively secured to flanges 3, 4 supported on an annular seat 5 by two fixing devices 6 diametrically opposed of which only one is shown.

Ce dispositif comporte une vis 7 dont la tige 8 traverse les deux brides parallèlement à l'axe X-X des conduits et dont la tête 9 est en butée axiale dans une douille 10 solidaire de la bride 3. Un écrou 11 vissé sur l'extrémité filetée 12 de la vis comprime vers la face 13 de la bride 4 une entretoise 14 constituée d'un ressort hélicoïdal entourant la tige 7. Entre l'écrou et le ressort 14 est interposée une rondelle ou coupelle 15 dite imperdable c'est-à-dire liée à l'écrou axialement, mais libre en rotation, grâce à une collerette sertie 16 de l'écrou. This device comprises a screw 7, the rod 8 of which crosses the two flanges parallel to the axis XX of the conduits and the head 9 of which is in axial abutment in a socket 10 integral with the flange 3. A nut 11 screwed onto the threaded end 12 of the screw compresses towards the face 13 of the flange 4 a spacer 14 consisting of a helical spring surrounding the rod 7. Between the nut and the spring 14 is interposed a washer or cup 15 called captive that is say linked to the nut axially, but free to rotate, thanks to a crimped flange 16 of the nut.

Entre la face 17 du ressort éloignée de l'écrou et la face 13 de la bride 4 sont interposés successivement une rondelle plate 18 et, selon l'invention, un rebord intérieur annulaire 19 d'une pièce tubulaire auxiliaire 20 qui entoure le ressort et les deux rondelles et qui comporte un second rebord intérieur d'extrémité 21 formant butée axiale pour la coupelle 15.Between the face 17 of the spring remote from the nut and the face 13 of the flange 4 are successively interposed a flat washer 18 and, according to the invention, an annular inner rim 19 of an auxiliary tubular part 20 which surrounds the spring and the two washers and which has a second inner end flange 21 forming an axial stop for the cup 15.

Cette pièce 20 comporte aussi des rebords jointifs longitudinaux 22 assemblés par soudage. Selon les figures 1 et 2 ces rebords s'étendent radialement; en variante ils se recouvrent suivant la périphérie de la pièce 20. This part 20 also includes longitudinal contiguous flanges 22 assembled by welding. According to Figures 1 and 2 these edges extend radially; as a variant, they overlap along the periphery of the part 20.

Le pièce 20 est métallique, par exemple en tôle d'alliage léger, et l'un de ses rebords 19 ou 21 est réalisé par sertissage après pré-assemblage de l'écrou, du ressort et des deux rondelles dans la pièce 20.  The part 20 is metallic, for example made of light alloy sheet, and one of its flanges 19 or 21 is produced by crimping after pre-assembly of the nut, the spring and the two washers in the part 20.

Selon le mode de réalisation de la figure 3, la pièce auxiliaire 20a comporte trois pattes 23 qui s'étendent axialement, à partir d'un rebord annulaire 19a, de manière à entourer partiellement le ressort et qui présentent chacune à son extrémité libre un repli intérieur 24 tel que l'ensemble des trois replis constitue un second rebord d'extrémité 21a. Dans ce cas, la pièce peut être en tôle d'acier, ce qui permet de supprimer la rondelle 18, le ressort prenant directement appui sur le rebord 19a, et d'utiliser l'élasticité des pattes pour assurer le pré-assemblage du ressort 14 avec l'écrou il associé à la rondelle imperdable 15. According to the embodiment of Figure 3, the auxiliary part 20a has three legs 23 which extend axially, from an annular flange 19a, so as to partially surround the spring and which each have at its free end a fold interior 24 such that all three folds constitute a second end flange 21a. In this case, the part can be made of sheet steel, which makes it possible to remove the washer 18, the spring directly resting on the flange 19a, and to use the elasticity of the tabs to ensure the pre-assembly of the spring. 14 with the nut associated with the captive washer 15.

Dans les deux cas, le pré-assemblage de l'écrou, de l'entretoise et d'une ou deux rondelles grâce à la pièce auxiliaire permet de monter aisément et rapidement en une seule manoeuvre l'ensemble de ces pièces sur la tige filetée. In both cases, the pre-assembly of the nut, the spacer and one or two washers thanks to the auxiliary part makes it possible to mount all of these parts easily and quickly on a single thread on the threaded rod .

Le serrage de l'écrou assure la poussée de l'empilage constitué par l'entretoise et les rondelles vers la face 13 de la bride 4, et par suite le rapprochement des deux brides. La poussée de l'empilage contenu dans la pièce auxiliaire 20 provoque un jeu axial entre la coupelle 15 et le rebord 21, ce jeu pouvant être relativement important dans le cas d'une entretoise compressible formée par un ressort, comme visible à la figure 1.The tightening of the nut ensures the thrust of the stack formed by the spacer and the washers towards the face 13 of the flange 4, and consequently the bringing together of the two flanges. The thrust of the stack contained in the auxiliary part 20 causes an axial play between the cup 15 and the flange 21, this play being able to be relatively great in the case of a compressible spacer formed by a spring, as visible in FIG. 1 .

En variante non représentée, la pièce auxiliaire est réalisée en matière plastique ou autre matériau relativement souple tel que papier indéchirable de manière à constituer une enveloppe entourant au moins partiellement l'entretoise et assurant le maintien axial contre celle-ci de la rondelle imperdable solidaire de l'écrou et éventuellement de la rondelle opposée. In a variant not shown, the auxiliary part is made of plastic or other relatively flexible material such as tear-resistant paper so as to constitute an envelope at least partially surrounding the spacer and ensuring the axial retention against the latter of the captive washer secured to the nut and possibly the opposite washer.

Dans le cas de la jonction de conduits d'échappement, la haute température d'utilisation de ceux-ci est susceptible de faire disparaître par fusion la pièce auxiliaire qui n'est utile que pour faciliter le montage du dispositif de fixation.  In the case of the junction of exhaust pipes, the high temperature of use of these is likely to cause the auxiliary part to disappear by fusion, which is only useful for facilitating the mounting of the fixing device.

Claims (6)

REVENDICATIONS 1 - Dispositif de fixation d'un organe au moyen d'un écrou vissé sur une tige filetée avec interposition, entre l'écrou et une face de l'organe, d'une entretoise et d'au moins une rondelle séparant l'écrou et l'entretoise, caractérisé en ce qu'il comporte une pièce auxiliaire (20;20a) de préassemblage de l'écrou (11) avec l'entretoise (14) et la rondelle interposée (15), celle-ci étant axialement solidaire de l'écrou. 1 - Device for fixing an organ by means of a nut screwed onto a threaded rod with interposition, between the nut and a face of the organ, of a spacer and at least one washer separating the nut and the spacer, characterized in that it comprises an auxiliary part (20; 20a) for pre-assembling the nut (11) with the spacer (14) and the interposed washer (15), the latter being axially integral of the nut. 2 - Dispositif de fixation selon la revendication 1, caractérisé en ce que la pièce auxiliaire (20;20a) entoure au moins partiellement l'entretoise (14) et présente deux rebords intérieurs d'extrémité butant axialement l'un (21;21a) sur la rondelle(15) solidaire de l'écrou, et l'autre (19;19a) sur la face (17) de l'entretoise éloignée de l'écrou ou sur une seconde rondelle (18) appliquée sur cette face; 2 - A fixing device according to claim 1, characterized in that the auxiliary part (20; 20a) at least partially surrounds the spacer (14) and has two inner end flanges axially abutting one (21; 21a) on the washer (15) integral with the nut, and the other (19; 19a) on the face (17) of the spacer remote from the nut or on a second washer (18) applied to this face; 3 - Dispositif de fixation selon la revendication 2, caractérisé en ce que la pièce auxiliaire (20) est métallique et tubulaire, et l'un des rebords (21) est réalisé par sertissage après pré-assemblage; 3 - A fixing device according to claim 2, characterized in that the auxiliary part (20) is metallic and tubular, and one of the flanges (21) is produced by crimping after pre-assembly; 4 - Dispositif de fixation selon la revendication 2, caractérisé en ce que la pièce auxiliaire (20a) est métallique et comporte au moins trois pattes (23) qui s'étendent axialement de manière à entourer partiellement l'entretoise (14) et qui présentent une extrémité libre repliée (24) constituant, pour l'ensemble des pattes, I'un (21a) des susdits rebords; 4 - fixing device according to claim 2, characterized in that the auxiliary part (20a) is metallic and comprises at least three tabs (23) which extend axially so as to partially surround the spacer (14) and which have a free folded end (24) constituting, for all of the tabs, one (21a) of the said flanges; 5 - Dispositif de fixation selon la revendication 1, caractérisé en ce que la pièce forme une enveloppe en matière plastique etlou destructible à la chaleur. 5 - A fastening device according to claim 1, characterized in that the part forms a plastic envelope etlou destructible to heat. 6 - Raccordement de conduits par brides reliées par au moins deux dispositifs de fixation par moyens filetés, caractérisé en ce que les dispositifs de fixation sont réalisés selon l'une quelconque des revendications précédentes.  6 - Connection of conduits by flanges connected by at least two fixing devices by threaded means, characterized in that the fixing devices are produced according to any one of the preceding claims.
FR9311324A 1993-09-23 1993-09-23 Device for fixing by nut and spacer, and connection of conduits by means of this device. Expired - Fee Related FR2710375B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9311324A FR2710375B1 (en) 1993-09-23 1993-09-23 Device for fixing by nut and spacer, and connection of conduits by means of this device.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9311324A FR2710375B1 (en) 1993-09-23 1993-09-23 Device for fixing by nut and spacer, and connection of conduits by means of this device.

Publications (2)

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FR2710375A1 true FR2710375A1 (en) 1995-03-31
FR2710375B1 FR2710375B1 (en) 1995-11-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2805498A1 (en) * 2000-02-25 2001-08-31 Renault Fittings, for assembly of exhaust system to engine, consist of exhaust manifold, pipe and bracket, which are mounted by rods, with threaded ends, with elastic elements between bracket and locking nuts

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066412A (en) * 1979-12-26 1981-07-08 Houdaille Industries Inc Punch Press Assembly Including a Preloaded Encapsulated Spring and Method of Manufacture
JPS59131723A (en) * 1983-01-17 1984-07-28 Mazda Motor Corp Structure of exhaust pipe of engine for vehicle
JPS61190365A (en) * 1985-02-20 1986-08-25 Olympus Optical Co Ltd Roller press-contacting mechanism for image forming device
EP0337854A1 (en) * 1988-04-12 1989-10-18 Jacques Dubois Flexible exhaust tube coupling

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066412A (en) * 1979-12-26 1981-07-08 Houdaille Industries Inc Punch Press Assembly Including a Preloaded Encapsulated Spring and Method of Manufacture
JPS59131723A (en) * 1983-01-17 1984-07-28 Mazda Motor Corp Structure of exhaust pipe of engine for vehicle
JPS61190365A (en) * 1985-02-20 1986-08-25 Olympus Optical Co Ltd Roller press-contacting mechanism for image forming device
EP0337854A1 (en) * 1988-04-12 1989-10-18 Jacques Dubois Flexible exhaust tube coupling

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 15 (P - 536) 16 January 1987 (1987-01-16) *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 258 (M - 340)<1695> 27 November 1984 (1984-11-27) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2805498A1 (en) * 2000-02-25 2001-08-31 Renault Fittings, for assembly of exhaust system to engine, consist of exhaust manifold, pipe and bracket, which are mounted by rods, with threaded ends, with elastic elements between bracket and locking nuts
EP1132588A1 (en) * 2000-02-25 2001-09-12 Renault Apparatus for assembling an exhaust gas line

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