WO2018162811A1 - Thermal protective sleeve for an anti-torque rod and anti-torque rod fitted therewith - Google Patents

Thermal protective sleeve for an anti-torque rod and anti-torque rod fitted therewith Download PDF

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Publication number
WO2018162811A1
WO2018162811A1 PCT/FR2018/050329 FR2018050329W WO2018162811A1 WO 2018162811 A1 WO2018162811 A1 WO 2018162811A1 FR 2018050329 W FR2018050329 W FR 2018050329W WO 2018162811 A1 WO2018162811 A1 WO 2018162811A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
thermal protection
torque rod
torque
protection sleeve
Prior art date
Application number
PCT/FR2018/050329
Other languages
French (fr)
Inventor
Frederic AQUILON
Thomas Cadilhac
Rhode ABASSE
Vincent BRETAGNE
Original Assignee
Psa Automobiles 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 Psa Automobiles Sa filed Critical Psa Automobiles Sa
Publication of WO2018162811A1 publication Critical patent/WO2018162811A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • B60K5/1208—Resilient supports
    • B60K5/1233—Resilient supports comprising protective elements, e.g. for protecting against heat, dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K5/00—Arrangement or mounting of internal-combustion or jet-propulsion units
    • B60K5/12—Arrangement of engine supports
    • B60K5/1241—Link-type support
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation

Definitions

  • the invention relates generally to the field of the automobile. More particularly, the invention relates to a thermal protection sleeve of an anti-torque link. The invention also relates to an anti-torque rod equipped with such a thermal protection sleeve.
  • Anti-torque rods also called “torque recovery rods” by the skilled person, are used in vehicles for the suspension of heat engines. These rods are, for example, used in suspensions of the pendular type. In this type of suspension, one or more anti-torque rods are mounted between the engine and the vehicle body to limit rotational movements of the engine along an axis substantially parallel to the crankshaft thereof.
  • Fig.1 shows a mounting of the prior art of an anti-torque rod 1 on a chassis 2 of the vehicle.
  • the anti-torque rod 1 typically comprises two elastic joints 10 and 1 1 which are fitted in a rigid frame body 12 generally metallic.
  • the joints 10, 1 1 are made with elastomeric materials 101, 1 10 which are fixed on inner cores 102, 1 1 1, respectively.
  • This first hinge 10 is intended to be connected to the engine block (not shown) and has a pivot function.
  • the mechanical connection of the first hinge 10 with the engine block is obtained by means of a hinge pin (not shown) which passes through the inner core 102 of the hinge by a bore 1 13 thereof.
  • the hinge 1 1, here called “second hinge” generally has a lower rigidity than that of the first hinge 10.
  • This second hinge January 1 has the function of limiting the deflections of the heat engine and filtering the vibrations transmitted to chassis 2 of the vehicle.
  • the second articulation 1 1 is mounted on a hinge pin 1 12 fixed to the frame 2.
  • a mounting lug 20 is here provided.
  • the hinge axis 1 12 passes through the lug 20 and the inner core 1 1 1 of the hinge, through a central bore of the core, and is screwed onto a threaded portion (not visible) of the frame 2.
  • Elastomer 1 is more particularly affected by aging. Indeed, in addition to being subjected to high mechanical stresses, the elastomer 1 10 is exposed to severe thermal stresses, related to its proximity to the exhaust line in the front block of the vehicle.
  • a device mounted in an aircraft, for thermally protecting a suspension means of a propulsion engine, such as a turbojet engine or a turboprop.
  • This device comprises thermal protection panels which are fixed on the suspension means.
  • Such a device is not suitable for the thermal protection of the elastomers of an anti-torque link in a motor vehicle.
  • the invention relates to a thermal protection sleeve for an anti-torque rod.
  • the sleeve comprises a sleeve body having a central orifice and a skirt portion extending the sleeve body, the sleeve bodies and skirt portion being integrally formed in a thermally resistant flexible material, the sleeve body having a sealing lip surrounding the central orifice and the skirt portion having a sealing flange forming an end edge.
  • the thermally resistant flexible material is silicone.
  • the sleeve is made by injection molding.
  • the waterproof fastening flange comprises a rigid overmolded portion in which is formed at least one clip.
  • the invention also relates to an anti-torque rod equipped with a thermal protection sleeve as briefly described above, the anti-torque rod having a rigid frame body supporting first and second joints.
  • the thermal protection sleeve is mounted on the rigid armature body of the anti-torque rod, the rigid armature body passing through the central orifice of the sleeve body, the sealing lip surrounding the rigid frame body, and the skirt portion being turned towards the second elastic hinge for the thermal protection thereof.
  • the invention also relates to a vehicle subassembly comprising a body cradle for mounting a heat engine and an anti-torque rod equipped with a thermal protection sleeve as described. briefly above.
  • the second elastic articulation of the anti-torque rod is mounted on a hinge axis inside the body cradle, the body cradle comprises an opening through which the body projects outwardly. rigid armature of the anti-torque rod, and the skirt portion closes the opening with its sealing flange which is attached to a circumferential edge of the opening.
  • the invention also relates to a vehicle comprising a subset as briefly described above.
  • - Fig.1 is a perspective view showing a mounting according to the prior art of an anti-torque rod in a vehicle body
  • FIG. 2 is a simplified plan view showing a vehicle subassembly according to the invention comprising a vehicle body cradle and an anti-torque rod equipped with a thermal protection sleeve according to the invention;
  • FIG. 3 is a partial perspective view of the subassembly of FIG. 2, with the thermal protection sleeve removed from the anti-torque link;
  • - Fig.4 is a partial perspective view of the subassembly of Fig.2;
  • FIGS. 5A and 5B are perspective views of the thermal protection sleeve according to the invention.
  • Fig.5C is an enlarged view of a clip included in a collar for fixing the thermal protection sleeve according to the invention.
  • FIG.2 it is schematically shown a mounting according to the invention of an anti-torque rod 3 in a cradle 4 of the vehicle body.
  • the cradle 4 is provided to support the powertrain of the vehicle.
  • the rod 3 is partially housed inside the cradle 4.
  • An elastic hinge 30 here called “second hinge” is formed in a part
  • the second hinge 30 is mounted inside the cradle 4, on an articulation axis 301 fixed to the cradle 4.
  • the hinge axis 301 crosses a central core 302 of the second articulation 30.
  • An elastomer 303 is adhered or fitted between the central core 302 and a rigid reinforcement body 304 of the link 3.
  • first hinge is formed in a front portion of the rod 3. As shown in Fig.3, the front portion of the rod 3, bearing the first hinge 31, projects to the outside of the cradle 4 through an opening 40 thereof.
  • the opening 40 must be large enough to allow, on the one hand, the movements of the link 3 during the rotating movements of the engine and, on the other hand, the mounting of the rod inside the cradle 4.
  • a thermal protection sleeve 5 which is mounted in the front portion of the link 3, as shown in Figs.2 and 4.
  • the sleeve 5 closes the opening 40 arranged in the cradle 4, so as to thermally protect the elastomer 303 of the second hinge 30.
  • the sleeve 5 prevents the intrusion of a hot air flow HA and heat radiation through the opening 40.
  • the hot air flow HA and the thermal radiation are produced by the exhaust line 6 located nearby.
  • the sleeve 5 thus protects the elastomer 303 against the harmful effects of heating generated by the exhaust line 6. The durability of the link 3 is thus improved.
  • Figures 5A and 5B show the sleeve 5 in more detail.
  • the sleeve 5 is typically an injection molded part.
  • the sleeve 5 is formed of a flexible and resilient material which is adapted to deform during deflections of the heat engine.
  • the material chosen for producing the sleeve 5 must also be able to accept point mechanical contacts and be thermally resistant.
  • Silicone is a material that is suitable for producing the sleeve 5. It has the desired flexibility, elasticity and temperature resistance. Of course, other types of material may be chosen according to the application.
  • the sleeve 5 comprises a sleeve body 50 and a skirt portion 51 in the form of a one-piece piece.
  • the sleeve body 50 has an opening 501 which is surrounded by a sealing lip and reinforcement 502.
  • the skirt portion 51 extends the sleeve body 50 and ends with a waterproof fastening flange 510 which forms an end edge of this portion 51.
  • the flange 510 is here formed in a rigid plastic material and is secured to the skirt 51 silicone by overmolding.
  • the flange 510 has a plurality of clips 51 1 which are distributed on its circumference.
  • the flange 510 has a circumferential shape which corresponds to that of the opening 40 of the cradle 4 so as to be insertable therein.
  • the flange 510 may be formed in the same material as the thermal protection sleeve and comprise elements forming molded clips of rigid plastic material.
  • a circumferential groove may also be arranged in the flange 510 and provided to engage with the sheet of the cradle 4 when the flange 510 is inserted into the opening 40.
  • the elasticity of the sleeve body 50 and its lip 502 allows the fitting of the front portion of the link 3 with the sleeve 5 and ensures a tight tight fit of the lip 502 on the front portion of the link 3
  • the first hinge 31 is inserted into the opening 501 and the sleeve body 50 is pushed into the front part of the link 3 until it reaches the position shown in FIG. In this position of Fig.4, the flange 510 of the sleeve 5 has been inserted into the opening 40 and clipped into it.
  • the clips 51 1 are then engaged with the sheet of the cradle 4 and prevent the withdrawal of the sleeve 4, while keeping a silicone end edge of the skirt 51 pressed against an outer surface of the cradle to ensure sealing.

Abstract

The thermal protective sleeve for an anti-torque rod according to the invention comprises a sleeve body (50) having a central aperture and a portion forming a skirt (51) extending the sleeve body, the sleeve body and the portion forming a skirt being formed in a single piece from a heat-resistant flexible material, the sleeve body having a sealing lip (502) surrounding the central aperture and the portion forming a skirt comprising a sealed fixing collar (510) forming an end edge.

Description

MANCHON DE PROTECTION THERMIQUE DE BIELLETTE ANTICOUPLE ET BIELLETTE ANTI-COUPLE ÉQUIPÉE  ANTICOUPLE THERMAL THERMAL PROTECTION SLEEVE AND EQUIPPED ANTI-TORQUE BARRIER
[001 ] L'invention concerne de manière générale le domaine de l'automobile. Plus particulièrement, l'invention se rapporte à un manchon de protection thermique d'une biellette anti-couple. L'invention se rapporte aussi à une biellette anti-couple équipée d'un tel manchon de protection thermique. [001] The invention relates generally to the field of the automobile. More particularly, the invention relates to a thermal protection sleeve of an anti-torque link. The invention also relates to an anti-torque rod equipped with such a thermal protection sleeve.
[002] Les biellettes anti-couple, appelées également « biellettes de reprise de couple » par l'homme du métier, sont utilisées dans les véhicules pour la suspension des moteurs thermiques. Ces biellettes sont, par exemple, employées dans les suspensions de type pendulaire. Dans ce type de suspension, une ou plusieurs biellettes anti-couple sont montées entre le moteur thermique et la caisse du véhicule pour limiter des mouvements de rotation du moteur thermique suivant un axe sensiblement parallèle au vilebrequin de celui-ci. [002] Anti-torque rods, also called "torque recovery rods" by the skilled person, are used in vehicles for the suspension of heat engines. These rods are, for example, used in suspensions of the pendular type. In this type of suspension, one or more anti-torque rods are mounted between the engine and the vehicle body to limit rotational movements of the engine along an axis substantially parallel to the crankshaft thereof.
[003] La Fig.1 montre un montage de la technique antérieure d'une biellette anti-couple 1 sur un châssis 2 du véhicule. [003] Fig.1 shows a mounting of the prior art of an anti-torque rod 1 on a chassis 2 of the vehicle.
[004] Comme montré à la Fig.1 , la biellette anti-couple 1 comprend typiquement deux articulations élastiques 10 et 1 1 qui sont emmanchées dans un corps d'armature rigide 12 généralement métallique. As shown in Fig.1, the anti-torque rod 1 typically comprises two elastic joints 10 and 1 1 which are fitted in a rigid frame body 12 generally metallic.
[005] Les articulations 10, 1 1 , sont réalisées avec des matériaux élastomères 101 , 1 10 qui sont fixés sur des noyaux intérieurs 102, 1 1 1 , respectivement. The joints 10, 1 1, are made with elastomeric materials 101, 1 10 which are fixed on inner cores 102, 1 1 1, respectively.
[006] L'articulation 10, dite ici « première articulation », présente habituellement une rigidité élevée. Cette première articulation 10 est prévue pour être reliée au bloc-moteur (non représenté) et a une fonction de pivot. La liaison mécanique de la première articulation 10 avec le bloc-moteur est obtenue à l'aide d'un axe d'articulation (non représenté) qui traverse le noyau interne 102 de l'articulation par un alésage 1 13 de celui- ci. [006] The hinge 10, here called "first hinge", usually has a high rigidity. This first hinge 10 is intended to be connected to the engine block (not shown) and has a pivot function. The mechanical connection of the first hinge 10 with the engine block is obtained by means of a hinge pin (not shown) which passes through the inner core 102 of the hinge by a bore 1 13 thereof.
[007] L'articulation 1 1 , dite ici « deuxième articulation » présente généralement une rigidité inférieure à celle de la première articulation 10. Cette deuxième articulation 1 1 a pour fonction de limiter les débattements du moteur thermique et de filtrer les vibrations transmises vers le châssis 2 du véhicule. La deuxième articulation 1 1 est montée sur un axe d'articulation 1 12 fixé au châssis 2. Une patte de montage 20 est ici prévue. L'axe d'articulation 1 12 traverse la patte 20 et le noyau interne 1 1 1 de l'articulation, par un alésage central du noyau, et est vissé sur une partie taraudée (non visible) du châssis 2. [007] The hinge 1 1, here called "second hinge" generally has a lower rigidity than that of the first hinge 10. This second hinge January 1 has the function of limiting the deflections of the heat engine and filtering the vibrations transmitted to chassis 2 of the vehicle. The second articulation 1 1 is mounted on a hinge pin 1 12 fixed to the frame 2. A mounting lug 20 is here provided. The hinge axis 1 12 passes through the lug 20 and the inner core 1 1 1 of the hinge, through a central bore of the core, and is screwed onto a threaded portion (not visible) of the frame 2.
[008] Dans une biellette anti-couple, la tenue au vieillissement en température de l'élastomère 1 10 de la deuxième articulation 1 1 pose une difficulté particulière. Du caoutchouc naturel plus ou moins chargé ou une matière synthétique est habituellement utilisé pour cet élastomère. La température influe de manière importante sur le comportement mécanique et le vieillissement de ces matériaux qui supportent mal en continu des températures s'approchant des 80 °C. [009] L'élastomère 1 10 est plus particulièrement affecté par le vieillissement. En effet, outre le fait d'être soumis à de fortes sollicitations mécaniques, l'élastomère 1 10 est exposé à des contraintes thermiques sévères, liées à sa proximité avec la ligne d'échappement dans le bloc avant du véhicule. [008] In an anti-torque rod, the resistance to temperature aging of the elastomer 1 10 of the second joint 1 1 poses a particular difficulty. More or less filled natural rubber or synthetic material is usually used for this elastomer. The temperature has a significant influence on the mechanical behavior and the aging of these materials which poorly withstand temperatures approaching 80 ° C. [009] Elastomer 1 is more particularly affected by aging. Indeed, in addition to being subjected to high mechanical stresses, the elastomer 1 10 is exposed to severe thermal stresses, related to its proximity to the exhaust line in the front block of the vehicle.
[0010] Par FR2996823B1 , il est connu un dispositif, monté dans un aéronef, pour protéger thermiquement un moyen de suspension d'un moteur de propulsion, tel qu'un turboréacteur ou un turbopropulseur. Ce dispositif comprend des panneaux de protection thermique qui sont fixés sur le moyen de suspension. Un tel dispositif n'est pas adapté pour la protection thermique des élastomères d'une biellette anti-couple dans un véhicule automobile. [001 1 ] Il est souhaitable d'apporter une solution au problème exposé ci-dessus, en fournissant un dispositif de protection thermique qui soit adapté pour une biellette anticouple de véhicule, de manière à améliorer la durabilité de celle-ci. By FR2996823B1, there is known a device, mounted in an aircraft, for thermally protecting a suspension means of a propulsion engine, such as a turbojet engine or a turboprop. This device comprises thermal protection panels which are fixed on the suspension means. Such a device is not suitable for the thermal protection of the elastomers of an anti-torque link in a motor vehicle. [001 1] It is desirable to provide a solution to the problem described above, by providing a thermal protection device that is adapted for a vehicle anti-torque rod, so as to improve the durability thereof.
[0012] Selon un premier aspect, l'invention concerne un manchon de protection thermique pour une biellette anti-couple. Conformément à l'invention, le manchon comporte un corps de manchon ayant un orifice central et une partie formant jupe prolongeant le corps de manchon, les corps de manchon et partie formant jupe étant formés en une seule pièce dans un matériau souple thermiquement résistant, le corps de manchon ayant une lèvre d'étanchéité entourant l'orifice central et la partie formant jupe comportant une collerette de fixation étanche formant un bord d'extrémité. [0013] Selon une forme de réalisation particulière de l'invention, le matériau souple thermiquement résistant est du silicone. [0014] Selon une caractéristique particulière, le manchon est réalisé par moulage par injection. According to a first aspect, the invention relates to a thermal protection sleeve for an anti-torque rod. According to the invention, the sleeve comprises a sleeve body having a central orifice and a skirt portion extending the sleeve body, the sleeve bodies and skirt portion being integrally formed in a thermally resistant flexible material, the sleeve body having a sealing lip surrounding the central orifice and the skirt portion having a sealing flange forming an end edge. According to a particular embodiment of the invention, the thermally resistant flexible material is silicone. According to a particular characteristic, the sleeve is made by injection molding.
[0015] Selon une autre caractéristique particulière, la collerette de fixation étanche comporte une partie rigide surmoulée dans laquelle est formé au moins un clip. [0016] Selon un autre aspect, l'invention concerne également une biellette anti-couple équipée d'un manchon de protection thermique tel que décrit brièvement ci-dessus, la biellette anti-couple ayant un corps d'armature rigide supportant des première et deuxième articulations. Conformément à l'invention, le manchon de protection thermique est monté sur le corps d'armature rigide de la biellette anti-couple, le corps d'armature rigide traversant l'orifice central du corps de manchon, la lèvre d'étanchéité entourant le corps d'armature rigide, et la partie formant jupe étant tournée vers la deuxième articulation élastique pour la protection thermique de celle-ci. According to another particular feature, the waterproof fastening flange comprises a rigid overmolded portion in which is formed at least one clip. According to another aspect, the invention also relates to an anti-torque rod equipped with a thermal protection sleeve as briefly described above, the anti-torque rod having a rigid frame body supporting first and second joints. According to the invention, the thermal protection sleeve is mounted on the rigid armature body of the anti-torque rod, the rigid armature body passing through the central orifice of the sleeve body, the sealing lip surrounding the rigid frame body, and the skirt portion being turned towards the second elastic hinge for the thermal protection thereof.
[0017] Selon encore un autre aspect, l'invention concerne aussi un sous-ensemble de véhicule comprenant un berceau de caisse pour le montage d'un moteur thermique et une biellette anti-couple équipée d'un manchon de protection thermique telle que décrite brièvement ci-dessus. Conformément à l'invention la deuxième articulation élastique de la biellette anti-couple est montée sur un axe d'articulation à l'intérieur du berceau de caisse, le berceau de caisse comprend une ouverture à travers laquelle se projette vers l'extérieur le corps d'armature rigide de la biellette anti-couple, et la partie formant jupe ferme l'ouverture avec sa collerette de fixation étanche qui est fixée à un bord circonférentiel de l'ouverture. According to yet another aspect, the invention also relates to a vehicle subassembly comprising a body cradle for mounting a heat engine and an anti-torque rod equipped with a thermal protection sleeve as described. briefly above. According to the invention, the second elastic articulation of the anti-torque rod is mounted on a hinge axis inside the body cradle, the body cradle comprises an opening through which the body projects outwardly. rigid armature of the anti-torque rod, and the skirt portion closes the opening with its sealing flange which is attached to a circumferential edge of the opening.
[0018] L'invention concerne aussi un véhicule comprenant un sous-ensemble tel que décrit brièvement ci-dessus. The invention also relates to a vehicle comprising a subset as briefly described above.
[0019] D'autres avantages et caractéristiques de la présente invention apparaîtront plus clairement à la lecture de la description détaillée ci-dessous de plusieurs formes de réalisation particulières de l'invention, en référence aux dessins annexés, dans lesquels : Other advantages and features of the present invention will emerge more clearly on reading the detailed description below of several particular embodiments of the invention, with reference to the appended drawings, in which:
- la Fig.1 est une vue en perspective montrant un montage selon la technique antérieure d'une biellette anti-couple dans une caisse de véhicule ; - Fig.1 is a perspective view showing a mounting according to the prior art of an anti-torque rod in a vehicle body;
- la Fig.2 est une vue plane simplifiée montrant un sous-ensemble de véhicule selon l'invention comprenant un berceau de caisse de véhicule et une biellette anti-couple équipée d'un manchon de protection thermique selon l'invention ; - la Fig.3 est une vue partielle en perspective du sous-ensemble de la Fig.2, avec le manchon de protection thermique retiré de la biellette anti-couple ; - Fig.2 is a simplified plan view showing a vehicle subassembly according to the invention comprising a vehicle body cradle and an anti-torque rod equipped with a thermal protection sleeve according to the invention; FIG. 3 is a partial perspective view of the subassembly of FIG. 2, with the thermal protection sleeve removed from the anti-torque link;
- la Fig.4 est une vue partielle en perspective du sous-ensemble de la Fig.2 ; - Fig.4 is a partial perspective view of the subassembly of Fig.2;
- les Figs.5A et 5B sont des vues en perspective du manchon de protection thermique selon l'invention ; et la Fig.5C est une vue agrandie d'un clip compris dans une collerette de fixation du manchon de protection thermique selon l'invention. FIGS. 5A and 5B are perspective views of the thermal protection sleeve according to the invention; and Fig.5C is an enlarged view of a clip included in a collar for fixing the thermal protection sleeve according to the invention.
[0020] A la Fig.2, il est montré de manière schématique un montage conforme à l'invention d'une biellette anti-couple 3 dans un berceau 4 de la caisse du véhicule. Le berceau 4 est prévu pour supporter le groupe motopropulseur du véhicule. In Fig.2, it is schematically shown a mounting according to the invention of an anti-torque rod 3 in a cradle 4 of the vehicle body. The cradle 4 is provided to support the powertrain of the vehicle.
[0021 ] Comme cela apparaît à la Fig.2, et aussi à la Fig.3, la biellette 3 est en partie logée à l'intérieur du berceau 4. Une articulation élastique 30 dite ici « deuxième articulation » est formée dans une partie arrière de la biellette 3. La deuxième articulation 30 est montée à l'intérieur du berceau 4, sur un axe d'articulation 301 fixé au berceau 4. [0022] Comme montré à la Fig.2, l'axe d'articulation 301 traverse un noyau central 302 de la deuxième articulation 30. Un élastomère 303 est adhérisé ou emmanché entre le noyau central 302 et un corps d'armature rigide 304 de la biellette 3. As shown in Fig.2, and also in Fig.3, the rod 3 is partially housed inside the cradle 4. An elastic hinge 30 here called "second hinge" is formed in a part The second hinge 30 is mounted inside the cradle 4, on an articulation axis 301 fixed to the cradle 4. As shown in FIG. 2, the hinge axis 301 crosses a central core 302 of the second articulation 30. An elastomer 303 is adhered or fitted between the central core 302 and a rigid reinforcement body 304 of the link 3.
[0023] Une autre articulation élastique 31 dite ici « première articulation » est formée dans une partie avant de la biellette 3. Comme montré à la Fig.3, la partie avant de la biellette 3, portant la première articulation 31 , se projette à l'extérieur du berceau 4 à travers une ouverture 40 de celui-ci. L'ouverture 40 doit être suffisamment grande, pour permettre, d'une part, les débattements de la biellette 3 lors des mouvements tournants du moteur thermique et, d'autre part, le montage de la biellette à l'intérieur du berceau 4. Another elastic hinge 31 here called "first hinge" is formed in a front portion of the rod 3. As shown in Fig.3, the front portion of the rod 3, bearing the first hinge 31, projects to the outside of the cradle 4 through an opening 40 thereof. The opening 40 must be large enough to allow, on the one hand, the movements of the link 3 during the rotating movements of the engine and, on the other hand, the mounting of the rod inside the cradle 4.
[0024] Conformément à l'invention, il est prévu un manchon de protection thermique 5 qui est monté dans la partie avant de la biellette 3, comme montré aux Figs.2 et 4. Le manchon 5 ferme l'ouverture 40 aménagée dans le berceau 4, de manière à protéger thermiquement l'élastomère 303 de la deuxième articulation 30. According to the invention, there is provided a thermal protection sleeve 5 which is mounted in the front portion of the link 3, as shown in Figs.2 and 4. The sleeve 5 closes the opening 40 arranged in the cradle 4, so as to thermally protect the elastomer 303 of the second hinge 30.
[0025] Comme montré schématiquement à la Fig.2, le manchon 5 empêche l'intrusion d'un flux d'air chaud HA et d'un rayonnement thermique à travers l'ouverture 40. Le flux d'air chaud HA et le rayonnement thermique sont produits par la ligne d'échappement 6 située à proximité. Le manchon 5 protège ainsi l'élastomère 303 contre les effets néfastes de réchauffement généré par la ligne d'échappement 6. La durabilité de la biellette 3 s'en trouve donc améliorée. As shown schematically in Fig.2, the sleeve 5 prevents the intrusion of a hot air flow HA and heat radiation through the opening 40. The hot air flow HA and the thermal radiation are produced by the exhaust line 6 located nearby. The sleeve 5 thus protects the elastomer 303 against the harmful effects of heating generated by the exhaust line 6. The durability of the link 3 is thus improved.
[0026] Les Figs.5A et 5B montrent le manchon 5 de manière plus détaillée. Le manchon 5 est typiquement une pièce moulée par injection. Figures 5A and 5B show the sleeve 5 in more detail. The sleeve 5 is typically an injection molded part.
[0027] Le manchon 5 est formé d'un matériau souple et élastique qui est apte à se déformer lors des débattements du moteur thermique. Le matériau choisi pour la réalisation du manchon 5 devra également pouvoir accepter des contacts mécaniques ponctuels et être thermiquement résistant. Le silicone est un matériau qui convient pour la réalisation du manchon 5. Il possède en effet la souplesse, l'élasticité et la tenue en température voulues. Bien entendu, d'autres types de matériau pourront être choisis selon l'application. The sleeve 5 is formed of a flexible and resilient material which is adapted to deform during deflections of the heat engine. The material chosen for producing the sleeve 5 must also be able to accept point mechanical contacts and be thermally resistant. Silicone is a material that is suitable for producing the sleeve 5. It has the desired flexibility, elasticity and temperature resistance. Of course, other types of material may be chosen according to the application.
[0028] Comme montré aux Figs.5A et 5B, le manchon 5 comprend un corps de manchon 50 et une partie formant jupe 51 sous la forme d'une pièce monobloc. [0029] Le corps de manchon 50 comporte une ouverture 501 qui est entourée d'une lèvre d'étanchéité et de renfort 502. La partie formant jupe 51 prolonge le corps de manchon 50 et se termine par une collerette de fixation étanche 510 qui forme un bord d'extrémité de cette partie 51 . As shown in Figs.5A and 5B, the sleeve 5 comprises a sleeve body 50 and a skirt portion 51 in the form of a one-piece piece. The sleeve body 50 has an opening 501 which is surrounded by a sealing lip and reinforcement 502. The skirt portion 51 extends the sleeve body 50 and ends with a waterproof fastening flange 510 which forms an end edge of this portion 51.
[0030] La collerette 510 est ici formée dans un matériau plastique rigide et est rendue solidaire de la jupe 51 en silicone par surmoulage. The flange 510 is here formed in a rigid plastic material and is secured to the skirt 51 silicone by overmolding.
[0031 ] En référence aussi à la Fig.5C, la collerette 510 comporte plusieurs clips 51 1 qui sont répartis sur sa circonférence. La collerette 510 a une forme circonférentielle qui correspond à celle de l'ouverture 40 du berceau 4 de manière à être insérable dans celle- ci. [0032] Dans d'autres formes de réalisation, on notera que la collerette 510 pourra être formée dans le même matériau que le manchon de protection thermique et comprendre des éléments formant clips surmoulés en matériau plastique rigide. Une rainure circonférentielle pourra également être aménagée dans la collerette 510 et prévue pour s'engager avec la tôle du berceau 4 lorsque la collerette 510 est insérée dans l'ouverture 40. [0033] L'élasticité du corps de manchon 50 et de sa lèvre 502 autorise l'emmanchement de la partie avant de la biellette 3 avec le manchon 5 et garantit un ajustement serré étanche de la lèvre 502 sur la partie avant de la biellette 3. Pour réaliser l'emmanchement, la première articulation 31 est insérée dans l'ouverture 501 et le corps de manchon 50 est poussé dans la partie avant de la biellette 3 jusqu'à atteindre la position montrée à la Fig.4. Dans cette position de la Fig.4, la collerette 510 du manchon 5 a été insérée dans l'ouverture 40 et clippée dans celle-ci. Les clips 51 1 sont alors engagés avec la tôle du berceau 4 et empêchent le retrait du manchon 4, tout en gardant un bord d'extrémité en silicone de la jupe 51 plaqué contre une surface extérieure du berceau afin de garantir l'étanchéité. Referring also to Fig.5C, the flange 510 has a plurality of clips 51 1 which are distributed on its circumference. The flange 510 has a circumferential shape which corresponds to that of the opening 40 of the cradle 4 so as to be insertable therein. In other embodiments, it will be noted that the flange 510 may be formed in the same material as the thermal protection sleeve and comprise elements forming molded clips of rigid plastic material. A circumferential groove may also be arranged in the flange 510 and provided to engage with the sheet of the cradle 4 when the flange 510 is inserted into the opening 40. The elasticity of the sleeve body 50 and its lip 502 allows the fitting of the front portion of the link 3 with the sleeve 5 and ensures a tight tight fit of the lip 502 on the front portion of the link 3 To effect the fitting, the first hinge 31 is inserted into the opening 501 and the sleeve body 50 is pushed into the front part of the link 3 until it reaches the position shown in FIG. In this position of Fig.4, the flange 510 of the sleeve 5 has been inserted into the opening 40 and clipped into it. The clips 51 1 are then engaged with the sheet of the cradle 4 and prevent the withdrawal of the sleeve 4, while keeping a silicone end edge of the skirt 51 pressed against an outer surface of the cradle to ensure sealing.
[0034] L'invention ne se limite pas aux formes de réalisation particulières qui ont été décrites ici à titre d'exemple. L'homme du métier, selon les applications de l'invention, pourra y apporter différentes modifications et variantes qui entrent dans la portée des revendications ci-annexées. The invention is not limited to the particular embodiments which have been described here by way of example. Those skilled in the art, according to the applications of the invention, may make various modifications and variations that fall within the scope of the appended claims.

Claims

REVENDICATIONS
1. Manchon de protection thermique d'une biellette anti-couple caractérisé en ce qu'il comprend un corps de manchon (50) ayant un orifice central (501 ) et une partie formant jupe (51 ) prolongeant ledit corps de manchon (50), lesdits corps de manchon (50) et partie formant jupe (51 ) étant formés en une seule pièce dans un matériau souple thermiquement résistant, ledit corps de manchon (50) ayant une lèvre d'étanchéité (502) entourant ledit orifice central (501 ) et ladite partie formant jupe (51 ) comportant une collerette de fixation étanche (510) formant un bord d'extrémité. A thermal protection sleeve of an anti-torque linkage characterized in that it comprises a sleeve body (50) having a central orifice (501) and a skirt portion (51) extending said sleeve body (50). said sleeve bodies (50) and skirt portion (51) being integrally formed in a thermally resistant flexible material, said sleeve body (50) having a sealing lip (502) surrounding said central hole (501); ) and said skirt portion (51) having a sealing flange (510) forming an end edge.
2. Manchon de protection thermique selon la revendication 1 , caractérisé en ce que ledit matériau souple thermiquement résistant est du silicone. 2. Thermal protection sleeve according to claim 1, characterized in that said thermally resistant flexible material is silicone.
3. Manchon de protection thermique selon la revendication 1 ou 2, caractérisé en ce qu'il est réalisé par moulage par injection. 3. thermal protection sleeve according to claim 1 or 2, characterized in that it is produced by injection molding.
4. Manchon de protection thermique selon l'une quelconque des revendications 1 à 3, caractérisé en ce que ladite collerette de fixation étanche comporte une partie rigide surmoulée (510) dans laquelle est formé au moins un clip (51 1 ). 4. Thermal protection sleeve according to any one of claims 1 to 3, characterized in that said waterproof fastening flange comprises a rigid overmoulded portion (510) in which is formed at least one clip (51 1).
5. Biellette anti-couple (3) équipée d'un manchon de protection thermique (5) selon l'une quelconque des revendications 1 à 4, ladite biellette anti-couple (3) ayant un corps d'armature rigide (304) supportant des première et deuxième articulations élastiques (31 , 30), caractérisé en ce que ledit manchon de protection thermique (5) est monté sur ledit corps d'armature rigide (304) de la biellette anti-couple (3), ledit corps d'armature rigide (304) traversant ledit orifice central (501 ) dudit corps de manchon (50), ladite lèvre d'étanchéité (502) entourant ledit corps d'armature rigide (304), et ladite partie formant jupe (51 ) étant tournée vers ladite deuxième articulation élastique (30) pour la protection thermique de celle-ci. Anti-torque rod (3) equipped with a thermal protection sleeve (5) according to any one of claims 1 to 4, said anti-torque rod (3) having a rigid reinforcing body (304) supporting first and second elastic hinges (31, 30), characterized in that said thermal protection sleeve (5) is mounted on said rigid frame body (304) of the anti-torque link (3), said body of rigid frame (304) extending through said central hole (501) of said sleeve body (50), said sealing lip (502) surrounding said rigid frame body (304), and said skirt portion (51) facing towards said second elastic hinge (30) for thermal protection thereof.
6. Sous-ensemble de véhicule comprenant un berceau de caisse (4) pour le montage d'un moteur thermique et une biellette anti-couple (3) équipée d'un manchon de protection thermique (5) selon la revendication 5, caractérisé en ce que ladite deuxième articulation élastique (30) de la biellette anti-couple (3) est monté sur un axe d'articulation (301 ) à l'intérieur dudit berceau de caisse (4), ledit berceau de caisse (4) comprend une ouverture (40) à travers laquelle se projette vers l'extérieur le corps d'armature rigide (304) de la biellette anti-couple (3), et ladite partie formant jupe (50) ferme ladite ouverture (40) avec sa collerette de fixation étanche (510) qui est fixée à un bord circonférentiel de ladite ouverture (40). Vehicle subassembly comprising a body cradle (4) for mounting a heat engine and an anti-torque rod (3) equipped with a thermal protection sleeve (5) according to claim 5, characterized in that said second resilient hinge (30) of the anti-torque link (3) is mounted on a hinge axis (301) within said cradle (4), said cradle (4) comprises a opening (40) through which is projected towards the rigid armature body (304) of the anti-torque rod (3), and said skirt portion (50) closes said opening (40) with its water-tight mounting flange (510) which is attached to a circumferential edge of said opening (40).
7. Véhicule caractérisé en ce qu'il comporte un sous-ensemble selon la revendication 7. Vehicle characterized in that it comprises a subassembly according to the claim
PCT/FR2018/050329 2017-03-06 2018-02-12 Thermal protective sleeve for an anti-torque rod and anti-torque rod fitted therewith WO2018162811A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1751781A FR3063459B1 (en) 2017-03-06 2017-03-06 ANTI-COUPLE THERMAL THERMAL PROTECTION SLEEVE AND EQUIPPED ANTI-TORQUE BARRIER
FR1751781 2017-03-06

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Publication Number Publication Date
WO2018162811A1 true WO2018162811A1 (en) 2018-09-13

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WO (1) WO2018162811A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0728610A1 (en) * 1995-02-22 1996-08-28 Hutchinson Thermal shield for a torque starting rocker bar of an internal combustion engine
DE19755314A1 (en) * 1997-12-12 1999-06-24 Audi Ag Heat-screening structural part
EP1302680A2 (en) * 2001-10-10 2003-04-16 General Electric Company Method and apparatus for coupling a link connector to a clevis
EP1426647A1 (en) * 2002-12-04 2004-06-09 Carl Freudenberg KG Support arm and method for its production
FR2927278A1 (en) * 2008-02-13 2009-08-14 Peugeot Citroen Automobiles Sa Support element for e.g. large hinge, of combustion engine of motor vehicle, has cooling air intake connected to air inlet channel, where air intake emerges close to hinge zone for establishing air circulation in vicinity of large hinge
FR2994244A1 (en) * 2012-07-31 2014-02-07 Peugeot Citroen Automobiles Sa Thermal protection device for protecting elastic stopper used for fixing electrical motor with rear axle cross-piece of hybrid car via clevis mounting, has base wall interdependent from lateral walls of mounting that surround stopper parts
FR2996823B1 (en) 2012-10-15 2014-11-21 Snecma DETACHABLE THERMAL PROTECTION IN LINE FOR A SUSPENSION ROLL OF A TURBOMACHINE

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0728610A1 (en) * 1995-02-22 1996-08-28 Hutchinson Thermal shield for a torque starting rocker bar of an internal combustion engine
DE19755314A1 (en) * 1997-12-12 1999-06-24 Audi Ag Heat-screening structural part
EP1302680A2 (en) * 2001-10-10 2003-04-16 General Electric Company Method and apparatus for coupling a link connector to a clevis
EP1426647A1 (en) * 2002-12-04 2004-06-09 Carl Freudenberg KG Support arm and method for its production
FR2927278A1 (en) * 2008-02-13 2009-08-14 Peugeot Citroen Automobiles Sa Support element for e.g. large hinge, of combustion engine of motor vehicle, has cooling air intake connected to air inlet channel, where air intake emerges close to hinge zone for establishing air circulation in vicinity of large hinge
FR2994244A1 (en) * 2012-07-31 2014-02-07 Peugeot Citroen Automobiles Sa Thermal protection device for protecting elastic stopper used for fixing electrical motor with rear axle cross-piece of hybrid car via clevis mounting, has base wall interdependent from lateral walls of mounting that surround stopper parts
FR2996823B1 (en) 2012-10-15 2014-11-21 Snecma DETACHABLE THERMAL PROTECTION IN LINE FOR A SUSPENSION ROLL OF A TURBOMACHINE

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FR3063459A1 (en) 2018-09-07
FR3063459B1 (en) 2019-03-22

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