FR2853379A1 - Elastic joint radial compression bias application procedure uses central sleeve inserted by force in inner component of joint - Google Patents

Elastic joint radial compression bias application procedure uses central sleeve inserted by force in inner component of joint Download PDF

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Publication number
FR2853379A1
FR2853379A1 FR0304036A FR0304036A FR2853379A1 FR 2853379 A1 FR2853379 A1 FR 2853379A1 FR 0304036 A FR0304036 A FR 0304036A FR 0304036 A FR0304036 A FR 0304036A FR 2853379 A1 FR2853379 A1 FR 2853379A1
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France
Prior art keywords
joint
central sleeve
radial compression
internal reinforcement
force
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Granted
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FR0304036A
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French (fr)
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FR2853379B1 (en
Inventor
Fontenay Etienne De
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Michelin AVS SAS
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Michelin AVS SAS
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Priority to FR0304036A priority Critical patent/FR2853379B1/en
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Publication of FR2853379B1 publication Critical patent/FR2853379B1/en
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Expired - Fee Related 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3842—Method of assembly, production or treatment; Mounting thereof
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/38—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type
    • F16F1/3863—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers with a sleeve of elastic material between a rigid outer sleeve and a rigid inner sleeve or pin, i.e. bushing-type characterised by the rigid sleeves or pin, e.g. of non-circular cross-section
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
    • F16F2228/08—Functional characteristics, e.g. variability, frequency-dependence pre-stressed

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Vehicle Body Suspensions (AREA)
  • Pivots And Pivotal Connections (AREA)

Abstract

The procedure consists of applying a permanent radial compression force to an elastomer material (8) adjacent to the inner rigid component (3) of an elastic articulated joint (1) by forcing a central sleeve (4) into the inner component. The sleeve can be in the form of two inserts (5, 6) introduced from either end of the sleeve, each having a thickened thrust surface, or a single component with its two ends expanded after insertion, and the external diameter of the sleeve is greater than the internal diameter of the inner rigid component prior to insertion.

Description

La présente invention concerne les articulations élastiques utilisées enThe present invention relates to the elastic joints used in

particulier sur les véhiculesparticular on vehicles

automobiles et les procédés d'obtention de ces articulations.  automobiles and the processes for obtaining these joints.

Afin d'améliorer la longévité des articulations, il est connu de précontraindre le matériau élastomérique en compression radiale. Ceci est généralement réalisé, après vulcanisation de l'élastomère, par une déformation permanente imprimée soit à l'armature extérieure soit à l'armature intérieure. L'opération qui consiste à réduire le volume (intérieur) de l'armature extérieure est appelée " rétreint ". L'opération qui consiste à augmenter le volume (extérieur) de 10 l'armature intérieure est appelée " dudgeonnage ". Suivant les dimensions des articulations, on applique une déformation permanente de l'ordre de 5 à 10% du diamètre.  In order to improve the longevity of the joints, it is known to prestress the elastomeric material in radial compression. This is generally achieved, after vulcanization of the elastomer, by a permanent deformation printed either on the outer frame or on the inner frame. The operation which consists in reducing the volume (inside) of the external frame is called "shrinking". The operation of increasing the volume (exterior) of the interior frame is called "expansion". Depending on the dimensions of the joints, a permanent deformation of the order of 5 to 10% of the diameter is applied.

La demande internationale WO 01/55615 décrit de telles articulations et un procédé permettant d'appliquer une précontrainte sensiblement de l'élastomère lorsque l'articulation comporte une ou 15 plusieurs armatures intermédiaires rigide.  International application WO 01/55615 describes such articulations and a method making it possible to apply a substantially prestressing of the elastomer when the articulation comprises one or more rigid intermediate reinforcements.

La présente invention concerne également le dudgeonnage et consiste d'abord en un procédé d'application d'une précontrainte de compression radiale à un matériau élastomérique d'une articulation élastique, ladite articulation comprenant une armature extérieure et une armature 20 intérieure, ledit procédé consistant à appliquer une contrainte permanente de compression radiale dans la partie dudit matériau élastomérique jouxtant l'armature intérieure, ladite compression radiale étant générée par l'emmanchement d'une douille centrale dans ladite armature intérieure, le diamètre extérieur de la douille centrale étant supérieur au diamètre intérieur de l'armature intérieure avant l'emmanchement.  The present invention also relates to unbending and firstly consists of a method of applying a radial compression preload to an elastomeric material of an elastic joint, said joint comprising an external frame and an internal frame, said method consisting applying a permanent radial compression stress in the part of said elastomeric material adjoining the internal reinforcement, said radial compression being generated by the fitting of a central sleeve into said internal reinforcement, the external diameter of the central sleeve being greater than the diameter interior of the interior frame before fitting.

De préférence, la douille centrale est constituée de deux inserts introduits de part et d'autre de l'armature intérieure. De préférence encore, l'extrémité extérieure de chaque insert comporte une surface d'appui épaissie. Alternativement, la douille centrale peut être unique et ses extrémités peuvent être épaissies selon le procédé dit de bouterollage décrit dans le brevet EP 0 524 844. 30 L'invention concerne également une articulation obtenue par ledit procédé c'est à dire une articulation élastomérique comprenant une douille centrale montée serrée dans une armature intérieure, la partie du matériau élastomérique jouxtant l'armature intérieure étant dans un état de contrainte permanente de compression radiale.  Preferably, the central sleeve consists of two inserts introduced on either side of the interior frame. More preferably, the outer end of each insert has a thickened bearing surface. Alternatively, the central sleeve can be single and its ends can be thickened according to the so-called bolting process described in patent EP 0 524 844. The invention also relates to a joint obtained by said process, ie an elastomeric joint comprising a central sleeve mounted tightly in an inner frame, the part of the elastomeric material adjoining the inner frame being in a state of permanent stress of radial compression.

De préférence, le matériau de l'armature intérieure est non-métallique, par exemple en polyamide.  Preferably, the material of the internal frame is non-metallic, for example made of polyamide.

De préférence, l'articulation est une articulation hydroélastique comprenant une armature 5 intermédiaire rigide. De telles armatures sont décrites dans la demande internationale PCT/FR 02/03446.  Preferably, the joint is a hydroelastic joint comprising a rigid intermediate frame. Such reinforcements are described in international application PCT / FR 02/03446.

Un avantage de l'invention est que l'on est moins limité par la capacité du matériau de l'armature intérieure à se déformer avant rupture. En effet, c'est la douille centrale qui assure la fonction de 10 liaison mécanique avec le véhicule, en particulier les efforts de compression axiale et de flexion.  An advantage of the invention is that one is less limited by the capacity of the material of the internal reinforcement to deform before rupture. In fact, it is the central sleeve which ensures the function of mechanical connection with the vehicle, in particular the axial compression and bending forces.

L'armature intérieure peut être bien moins rigide car elle assure uniquement la transmission des efforts de cisaillement axial et de torsion du matériau élastomérique.  The internal reinforcement can be much less rigid because it only ensures the transmission of the axial shearing and torsional forces of the elastomeric material.

D'autres avantages peuvent être obtenus grâce à l'invention, en particulier: * Plus grande liberté de forme de l'armature intérieure si elle sous- traitance moulée en matière plastique (on peut par exemple réaliser une portion de rotule ou des appuis), * Plus grande liberté de forme de la douille centrale, qui peut même être réalisée en plusieurs parties, * Isolation thermique de la partie en plastique intérieure. 20 L'invention trouvera son application en particulier dans les cas d'articulations en élastomères qui ne peuvent subir de rétreint de leur tube extérieur du fait de leur architecture (articulations hydroélastiques, articulations moulées directement dans le bras de suspension ou dans une pièce ne pouvant être déformée, articulations possédant une armature intermédiaire (insert tubulaire 25 intermédiaire).  Other advantages can be obtained thanks to the invention, in particular: * Greater freedom of shape of the internal frame if it is subcontracted molded in plastic material (one can for example make a portion of ball joint or supports) , * Greater freedom of form of the central sleeve, which can even be made in several parts, * Thermal insulation of the internal plastic part. The invention will find its application in particular in the case of elastomeric joints which cannot undergo shrinking of their outer tube due to their architecture (hydroelastic joints, joints molded directly in the suspension arm or in a part which cannot be deformed, joints having an intermediate frame (intermediate tubular insert).

L'invention sera mieux comprise par la description de quelques modes particuliers de réalisation à l'aide des figures suivantes: Fig 1: coupe d'une articulation selon l'invention, Fig 2: coupe d'un second mode de réalisation de l'articulation selon l'invention A la figure 1, on a représenté la coupe d'un exemple d'articulation élastique 1. Elle comprend une armature extérieure 2 et une armature intérieure 3 sensiblement cylindriques. Ces armatures sont D 1) 1 '7 n-i 1n reliées entre elles par deux parties différentes reliées en série. La partie intérieure est essentiellement constituée d'un matériau élastomérique 8. La partie extérieure consiste ici en une articulation hydroélastique 10. Ces deux parties sont séparées par une armature intermédiaire 7. La douille centrale 4 est serrée dans l'armature intérieure 3. Sur la figure 1, la douille centrale est 5 constituée de deux demi-douilles 5 et 6. L'assemblage des deux demi-douilles ménage ici un épaulement 9 qui permet de renforcer la liaison par emmanchement vis à vis de contraintes axiales.  The invention will be better understood by the description of some particular embodiments using the following figures: Fig 1: section of a joint according to the invention, Fig 2: section of a second embodiment of the articulation according to the invention In FIG. 1, there is shown the section through an example of elastic articulation 1. It comprises an external reinforcement 2 and an internal reinforcement 3 which are substantially cylindrical. These frames are D 1) 1 '7 n-i 1n connected together by two different parts connected in series. The inner part consists essentially of an elastomeric material 8. The outer part here consists of a hydroelastic articulation 10. These two parts are separated by an intermediate frame 7. The central bush 4 is clamped in the inner frame 3. On the Figure 1, the central sleeve 5 consists of two half-sockets 5 and 6. The assembly of the two half-sockets household here a shoulder 9 which allows to strengthen the connection by fitting with respect to axial stresses.

De plus, la forme des extrémités centrales jointives des deux demidouilles peut être choisie telle qu'elle facilite l'opération d'emmanchement à force. La partie intérieure constituée du matériau élastomérique 8 subit donc une contrainte permanente de compression radiale du fait de 10 l'expansion forcée de l'armature intérieure 3.  In addition, the shape of the central joining ends of the two half-sleeves can be chosen such that it facilitates the press fit operation. The inner part made of the elastomeric material 8 therefore undergoes a permanent radial compression stress due to the forced expansion of the inner frame 3.

La figure 2 représente un second mode de réalisation de l'invention. La différence essentielle avec celui de la figure 1 concerne la douille centrale 4. Celle-ci est dans cet exemple réalisée en une seule pièce. Ses extrémités sont épaissies après l'opération d'emmanchement, par exemple par une 15 opération finale de bouterollage (voir EP 0 524 844 et WO 02/070170).  FIG. 2 represents a second embodiment of the invention. The essential difference with that of FIG. 1 relates to the central sleeve 4. This is in this example made in one piece. Its ends are thickened after the fitting operation, for example by a final rolling operation (see EP 0 524 844 and WO 02/070170).

La figure 3 représente la partie moulée d'une articulation semblable à celle de la figure 1 telle qu'elle peut se présenter après l'opération de moulage, c'est à dire avant le sertissage de l'armature extérieure et avant l'emmanchement à force de la douille centrale dans l'armature intérieure 3. 20 Dans cet état, le matériau élastomérique 8 n'est pas comprimé et il peut même être soumis à une contrainte de traction radiale du fait de la réduction de volume qui accompagne généralement le refroidissement suite au moulage.  FIG. 3 represents the molded part of a joint similar to that of FIG. 1 as it may appear after the molding operation, that is to say before the crimping of the external frame and before the fitting by force of the central sleeve in the inner frame 3. In this state, the elastomeric material 8 is not compressed and it can even be subjected to a radial tensile stress due to the reduction in volume which generally accompanies the cooling after molding.

Pl 1 nn 1r7rCT _T PPl 1 nn 1r7rCT _T P

Claims (7)

REVENDICATIONS 1. Procédé d'application d'une précontrainte de compression radiale à un matériau élastomérique d'une articulation élastique, ladite articulation comprenant une armature extérieure et une 5 armature intérieure, ledit procédé consistant à appliquer une contrainte permanente de compression radiale dans la partie dudit matériau élastomérique jouxtant l'armature intérieure, ladite compression radiale étant générée par l'emmanchement d'une douille centrale dans ladite armature intérieure, le diamètre extérieur de la douille centrale étant supérieur au diamètre intérieur de l'armature intérieure avant l'emmanchement. 10  1. A method of applying a radial compression preload to an elastomeric material of an elastic joint, said articulation comprising an external reinforcement and an internal reinforcement, said method consisting in applying a permanent radial compression stress in the part of said elastomeric material adjoining the internal reinforcement, said radial compression being generated by the fitting of a central sleeve into said internal reinforcement, the external diameter of the central sleeve being greater than the internal diameter of the internal reinforcement before fitting. 10 2. Procédé selon la revendication 1 dans lequel la douille centrale est constituée de deux inserts introduits de part et d'autre de l'armature intérieure.2. Method according to claim 1 wherein the central sleeve consists of two inserts introduced on either side of the inner frame. 3. Procédé selon la revendication 2 dans lequel l'extrémité extérieure de chaque insert comporte 15 une surface d'appui épaissie.  3. The method of claim 2 wherein the outer end of each insert has a thickened bearing surface. 4. Procédé selon la revendication 1 dans lequel la douille centrale est unique et ses extrémités sont épaissies par une opération de bouterollage.  4. Method according to claim 1 in which the central sleeve is single and its ends are thickened by a rolling operation. 5. Articulation obtenue par le procédé selon l'une des revendications précédentes dans laquelle la partie du matériau élastomérique jouxtant l'armature intérieure est dans un état de contrainte permanente de compression radiale.  5. Joint obtained by the method according to one of the preceding claims in which the part of the elastomeric material adjoining the internal reinforcement is in a state of permanent stress of radial compression. 6. Articulation selon la revendication 5 dans laquelle le matériau de l'armature intérieure est un 25 matériau non-métallique, de préférence en polyamide.  6. Joint according to claim 5 in which the material of the internal reinforcement is a non-metallic material, preferably of polyamide. 7. Articulation selon l'une des revendications 5 ou 6, ladite articulation étant une articulation hydroélastique comprenant une armature intermédiaire rigide.  7. Joint according to one of claims 5 or 6, said joint being a hydroelastic joint comprising a rigid intermediate frame. Pl 1-lO 17-CT. -FRPl 1-lO 17-CT. -FR
FR0304036A 2003-04-01 2003-04-01 METHOD FOR APPLYING A COMPRESSION PRECONTROLLER TO AN ELASTIC JOINT Expired - Fee Related FR2853379B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007118994A1 (en) 2006-04-14 2007-10-25 Societe De Technologie Michelin Structurally optimized hydro-elastic joint and method of making it
FR2909428A1 (en) 2006-12-01 2008-06-06 Michelin Soc Tech Elastic hinge for force transmission structure of motor vehicle, has intermediate armature with reliefs for transmitting force to support internal armature on sleeve when displacement of internal armature and sleeve is greater than limit
FR2921706A1 (en) 2007-09-27 2009-04-03 Michelin Soc Tech HYDROELASTIC ANTIVIBRATORY DEVICE
DE102019000973A1 (en) * 2019-02-11 2020-08-13 Sumitomo Riko Company Limited Vibration isolation bearings and manufacturing process

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834351A (en) * 1987-05-21 1989-05-30 Freudenberg Carl Fa Rubber sleeve spring
JPH02113137A (en) * 1988-10-21 1990-04-25 Bridgestone Corp Vibration-proof device
EP0499996A1 (en) * 1991-02-19 1992-08-26 Bridgestone Corporation Vibration isolation apparatus
FR2679470A1 (en) * 1991-07-23 1993-01-29 Caoutchouc Manuf Plastique Method of forming an additional thickness (allowance) at the ends of the internal bush of an articulation, after moulding, and its applications
JPH08233006A (en) * 1995-02-24 1996-09-10 Bridgestone Corp Vibration isolator and its manufacture
FR2739153A1 (en) * 1995-09-27 1997-03-28 Peugeot Elastic pivot joint for suspension of motor vehicle
FR2818717A1 (en) * 2000-12-26 2002-06-28 Eurocopter France Elastic shock absorbing coupling e.g. for helicopter rotor blades has viscoelastic sleeves between inner, outer and intermediate rigid cylinders

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4834351A (en) * 1987-05-21 1989-05-30 Freudenberg Carl Fa Rubber sleeve spring
JPH02113137A (en) * 1988-10-21 1990-04-25 Bridgestone Corp Vibration-proof device
EP0499996A1 (en) * 1991-02-19 1992-08-26 Bridgestone Corporation Vibration isolation apparatus
FR2679470A1 (en) * 1991-07-23 1993-01-29 Caoutchouc Manuf Plastique Method of forming an additional thickness (allowance) at the ends of the internal bush of an articulation, after moulding, and its applications
JPH08233006A (en) * 1995-02-24 1996-09-10 Bridgestone Corp Vibration isolator and its manufacture
FR2739153A1 (en) * 1995-09-27 1997-03-28 Peugeot Elastic pivot joint for suspension of motor vehicle
FR2818717A1 (en) * 2000-12-26 2002-06-28 Eurocopter France Elastic shock absorbing coupling e.g. for helicopter rotor blades has viscoelastic sleeves between inner, outer and intermediate rigid cylinders

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 331 (M - 0999) 17 July 1990 (1990-07-17) *
PATENT ABSTRACTS OF JAPAN vol. 1997, no. 01 31 January 1997 (1997-01-31) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007118994A1 (en) 2006-04-14 2007-10-25 Societe De Technologie Michelin Structurally optimized hydro-elastic joint and method of making it
FR2909428A1 (en) 2006-12-01 2008-06-06 Michelin Soc Tech Elastic hinge for force transmission structure of motor vehicle, has intermediate armature with reliefs for transmitting force to support internal armature on sleeve when displacement of internal armature and sleeve is greater than limit
WO2008071885A2 (en) 2006-12-01 2008-06-19 Societe De Technologie Michelin Elastic articulation with a selectively functional, direct force-transmission structure
FR2921706A1 (en) 2007-09-27 2009-04-03 Michelin Soc Tech HYDROELASTIC ANTIVIBRATORY DEVICE
DE102019000973A1 (en) * 2019-02-11 2020-08-13 Sumitomo Riko Company Limited Vibration isolation bearings and manufacturing process
DE102019000973B4 (en) 2019-02-11 2022-04-28 Sumitomo Riko Company Limited Vibration isolation bearing and method of manufacture

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