EP4274953A1 - Quick-fastening acoustic protector - Google Patents

Quick-fastening acoustic protector

Info

Publication number
EP4274953A1
EP4274953A1 EP21836064.2A EP21836064A EP4274953A1 EP 4274953 A1 EP4274953 A1 EP 4274953A1 EP 21836064 A EP21836064 A EP 21836064A EP 4274953 A1 EP4274953 A1 EP 4274953A1
Authority
EP
European Patent Office
Prior art keywords
drive wheel
acoustic protection
protection device
acoustic
cover
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.)
Pending
Application number
EP21836064.2A
Other languages
German (de)
French (fr)
Inventor
Valentin FRADET
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.)
Ampere SAS
Original Assignee
Renault SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renault SAS filed Critical Renault SAS
Publication of EP4274953A1 publication Critical patent/EP4274953A1/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/32—Friction members
    • F16H55/36—Pulleys
    • 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
    • F02B77/13—Acoustic insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted for gearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/30—Chain-wheels
    • F16H2055/306—Chain-wheels with means providing resilience or vibration damping in chain sprocket wheels

Definitions

  • TITLE Quick-fit acoustic protector.
  • the present invention relates to an internal combustion engine.
  • the present invention relates to an acoustic protection screen for a heat engine part.
  • the present invention relates more particularly to an acoustic protection screen for a heat engine crankshaft end.
  • An internal combustion or heat engine of a motor vehicle comprises a crankshaft movable in rotation around a longitudinal axis of the engine, one timing end of which opens out from the timing face of the casing of said engine.
  • Said distribution end carries at least one drive wheel for driving in rotation various elements of the engine such as a camshaft, an accessory pulley, an actuating wheel of an alternator-starter or of a hydraulic pump.
  • Said engine generates various types of pollution that we try to reduce or even eliminate. These pollutions are for example soot and oxides of carbon.
  • acoustic protection screens enveloping parts of the engine, either on parts emitting sound, or on parts receiving and capable of reflecting sound.
  • Publication FR3079001-A1 thus proposes a protective screen for an air filter for a heat engine of a motor vehicle covering said filter which does not generate noise or sound in order to reduce sound reflections on the wall of said filter.
  • Another publication FR3006265-A1 discloses an acoustic protection screen for a motor vehicle engine based on polyurethane foam.
  • Sounds are generated by the explosions in a combustion chamber of said engine, said chamber being delimited by a cylinder, a lower wall of a cylinder head and a piston sliding back and forth in said cylinder, said cylinder, cylinder head and piston are engine elements.
  • the noises generated are likely to propagate in a connecting rod chamber situated at a lower end of the cylinder, and in which is mounted a crankshaft which can rotate along the longitudinal axis of the engine.
  • Said crankshaft emerges from the engine casing and has one end coupled via a drive wheel for distribution to wheels for actuating the accessory elements of the engine, the list of which may include a water pump, an alternator, a camshaft.
  • the noises are therefore likely to propagate outside the engine, in particular outside the engine casing via this timing end of the crankshaft.
  • an acoustic protection screen covering the distribution face of the motor for example integrated into a distribution casing covering said face.
  • the object of the invention is to remedy these problems and one of the objects of the invention is an acoustic protection device fixed to the crankshaft drive wheel and covering said wheel.
  • the present invention relates more particularly to an acoustic protection device for a heat engine of a motor vehicle which comprises a crankshaft movable in rotation about a longitudinal axis of the engine and carrying a driving distribution wheel,
  • said device comprises an acoustic protection cover covering the driving distribution wheel.
  • the acoustic protection device comprises a cover covering the drive wheel carried by the end of the crankshaft to ensure optimum acoustic protection against engine noise likely to pass through an opening in the engine casing surrounding the crankshaft.
  • the cover is attached to the driving wheel of the crankshaft.
  • the cover is fixed integral with the driving wheel of the crankshaft so as not to prevent access to other parts of the engine in the vicinity.
  • the cover includes an acoustic protection layer facing the driving wheel of the crankshaft.
  • the cover comprises an acoustic protection layer which faces the driving wheel of the crankshaft to better absorb noise.
  • the device comprises an angular centering pin.
  • the device comprises an angular centering pin to angularly link the device with the rotating crankshaft drive wheel.
  • the drive wheel with the acoustic protection cover forms a single rotating part and having acoustic insulation.
  • the centering pin has an anchoring part embedded in the acoustic protection layer and a fixing foot sunk in the drive wheel
  • the angular centering pin has an anchoring part embedded in the layer of protection or acoustic insulation to obtain the best efficiency of said insulation without disturbance of mechanical origin.
  • the device comprises axial rapid attachment means with the drive wheel.
  • the device comprises means for axial attachment with the drive wheel to bond the layer of insulation against the drive wheel.
  • the axial quick fastening means comprise magnetic cylindrical tokens embedded in the protective layer having a free circular face intended for contact with the drive wheel.
  • magnetic cylindrical tokens are embedded in the sound insulation layer and have a substantially free circular face to come into contact with the driving wheel which is made of steel. Said tokens are able to maintain the acoustic protection layer against the drive wheel in a simple manner.
  • Magnetic tokens do not require any mechanical operation on the driving wheel.
  • the quick-fixing means comprise clip-fastening means.
  • the axial fixing means comprise at least one clip-on fixing element connected to the driving wheel by force connection
  • the device comprises a fastening ring fixed integral with the drive wheel cooperating with the acoustic protection cover.
  • the acoustic protection device comprises a fastening ring integral with the drive wheel to facilitate the attachment of the cover against the drive wheel.
  • the fixing ring is arranged in the extension of the driving wheel along the axis of said wheel.
  • the fixing ring is placed in the axial extension of the drive wheel to place the acoustic protection cover as close as possible to the drive wheel.
  • the acoustic protection cover covers the peripheral surface of the fixing ring.
  • the acoustic protection cover covers the peripheral surface of the fixing ring to optimally cap the drive wheel and prevent the propagation of noise.
  • FIG. 1 is a schematic view of the heat engine distribution face with an acoustic protection cover.
  • FIG. 2 is a schematic view of a drive wheel carried by the end of the crankshaft.
  • FIG. 3 is a schematic longitudinal sectional view of the timing end of the crankshaft with the drive wheel and the acoustic protection device.
  • the invention relates to a thermal or internal combustion motor vehicle engine.
  • the heat engine 50 comprises at least one cylinder hollowed out in a cylinder block 51, at least one piston sliding according to a reciprocating movement in said cylinder and connected by a connecting rod to a crankshaft which is extends along a longitudinal axis of the engine.
  • the reciprocating sliding movement of the piston is thus transformed into a rotational movement of the crankshaft 52 according to FIG.
  • the crankshaft is housed in a connecting rod chamber in the lower part of the cylinder block and emerges from the cylinder block to be connected to various engine components by means of a drive device comprising drive wheels.
  • the crankshaft thus emerges from the timing face 53 of the engine and carries a drive wheel 40 able to drive in rotation via a chain or a transmission belt at least one pinion of an accessory element (not shown) of the engine such as a water pump for example.
  • the engine is the seat of combustions which occur in at least one combustion chamber arranged above the at least one piston. Said combustion therefore generates noise which can propagate via the crankshaft to the outside of the engine. It can be seen in Figure 1 that the distribution face 53 is not completely by a distribution housing 54. Said distribution housing 54 does not cover the drive wheel 40 to allow for example the training of other accessories not shown . The noise generated by the operation of the engine can then escape to the outside of said engine via the drive wheel 40.
  • the invention proposes a high-performance acoustic protection device capable of preventing the propagation of noise originating from inside the engine and propagating through the crankshaft to the drive wheel.
  • the invention proposes an acoustic protection device 10 covering only the drive wheel which here is not covered by the timing cover 54. Said device is able to cover the drive wheel and is kept in contact with said wheel.
  • the device 10 according to the invention is arranged directly on the drive wheel 40, resting against an outer face 41 of the drive wheel directed towards the outside of the engine.
  • the protection device 10 comprises a fixing ring 11 allowing the fixing of a cover 12 for acoustic protection.
  • Said fixing ring 11 is integrally linked to the drive wheel by fixing screws 13 as shown in Figure 2 or be in one piece with the drive wheel.
  • Said fixing ring 11 comprises metal fixing zones 14.
  • Said ring can be made of plastic material but it has metal fixing zones 14.
  • Said crown 11 also includes centering openings 15.
  • the drive wheel 40 carried by the end 55 of the crankshaft emerging from the timing face of the engine is covered by the acoustic protection cover 12.
  • Said cover 12 is substantially conical in the shape of a bell and covers the entire outer face 41 of the drive wheel 40 facing the outside of the engine.
  • the cover is able to optimally prevent the propagation of noise to the outside of the engine. Protection is more effective by placing the acoustic protection device as close as possible to the noise source.
  • Cover 12 includes a layer of protection 16 or acoustic insulation facing drive wheel 40.
  • Said layer 16 can for example be glued to the cover 12 which is preferably made of plastic to limit the weight and the torque of the protection device 10.
  • Said layer 16 can also be in one piece with the cover 12.
  • Said acoustic protection layer 16 covers the circular peripheral surface 11p of the fixing ring 11 to completely cover the drive wheel.
  • said device 10 comprises at least one centering pin 17 which extends along the axis of the cover X, towards the driving wheel.
  • the at least one centering pin is substantially tubular and has an anchoring part 18 embedded in the acoustic protection layer and a fixing foot 19 pressed into the fixing hole 15 of the fixing ring 11 of the driving wheel . Said foot is integral in rotation with the drive wheel.
  • the at least one centering pin 17 is received in the at least one fixing hole 15 passing through the wall of the drive wheel.
  • the shapes of the centering pin in particular its diameter, are substantially complementary to those of the fixing orifice in the toothed wheel.
  • the edge of the fixing orifice has zones of contact with the centering pin to ensure correct centering of the pin 17 through the orifice 15.
  • the at least one centering pin 17 is received in the fixing hole 15 substantially oblong.
  • the device also comprises means of rapid attachment 18 axially with the driving wheel 40, in particular the fixing ring 11, to hold said device 10 against the driving wheel 40.
  • means of rapid attachment 18 axially with the driving wheel 40, in particular the fixing ring 11, to hold said device 10 against the driving wheel 40.
  • the layer of acoustic insulation 16 is held against said wheel 40.
  • the axial quick fastening means 18 comprise magnetic cylindrical tokens 19 embedded in the protective layer having a free circular face intended for contact with the drive wheel.
  • a magnetic cylindrical token 19 comprises an anchoring part 19a embedded in the acoustic insulation layer 16 and has a circular face 20 that is substantially free to come into contact with a metal fixing zone of the driving wheel fixing crown. Said tokens are able to maintain the acoustic protection layer against the drive wheel in a simple manner.
  • the magnetic tokens do not require any mechanical operation on the fixing crown 11 of the metal drive wheel.
  • the fastening ring integral with the drive wheel can also be of non-metallic material, for example plastic, and have metallic attachment zones 19b on which the face 20 of the token comes into contact.
  • the quick fastening means 18 comprise clip fastening means.
  • Said axial fixing means 18 comprise at least one clip-on fixing element embedded in the insulating layer in a similar way, for example, to at least one centering pin 19 and connected to the drive wheel, in particular the fixing ring 11 , by force connection.
  • This embodiment requires at least one hole in the fixing ring 11 of the driving wheel opposite the fixing foot of the clipping element.
  • the acoustic protection device 10 is fixed integral in rotation with the crankshaft drive wheel and covers or caps the outer face 41 of said wheel to optimally prevent the propagation of noise generated inside the engine. outwards.
  • the device is fixed in a removable and simple manner to said drive wheel and does not generate any space constraints for the fittings of the other elements or accessories of the engine.
  • the invention is not limited to the single embodiments of this grip, described above by way of examples, on the contrary it embraces all the variants, in particular the at least one pawn of centering can also be used to fix the device against the driving wheel.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

The invention relates to an acoustic protection device (10) for a heat engine (50) of a motor vehicle, the engine comprising a crankshaft that is capable of rotating about a longitudinal axis X of the motor and supports a timing drive gear (40), the device (10) being characterised in that it comprises an acoustic protection cover (12) covering the timing drive gear (40).

Description

TITRE : Protecteur acoustique à fixation rapide. TITLE: Quick-fit acoustic protector.
Domaine technique de l’invention Technical field of the invention
La présente invention concerne un moteur à combustion interne. The present invention relates to an internal combustion engine.
La présente invention concerne un écran de protection acoustique de partie de moteur thermique. The present invention relates to an acoustic protection screen for a heat engine part.
La présente invention concerne plus particulièrement un écran de protection acoustique pour une extrémité de vilebrequin de moteur thermique. The present invention relates more particularly to an acoustic protection screen for a heat engine crankshaft end.
Etat de la technique State of the art
Un moteur à combustion interne ou thermique de véhicule automobile comporte un vilebrequin mobile en rotation autour d’un axe longitudinal du moteur, dont une extrémité de distribution débouche de la face de distribution du carter dudit moteur. An internal combustion or heat engine of a motor vehicle comprises a crankshaft movable in rotation around a longitudinal axis of the engine, one timing end of which opens out from the timing face of the casing of said engine.
Ladite extrémité de distribution porte au moins une roue menante pour entraîner en rotation différents éléments du moteur tels qu’un arbre à cames, une poulie d’accessoires, une roue d’actionnement d’un alterno-démarreur ou de pompe hydraulique. Said distribution end carries at least one drive wheel for driving in rotation various elements of the engine such as a camshaft, an accessory pulley, an actuating wheel of an alternator-starter or of a hydraulic pump.
Ledit moteur génère différentes pollutions que l’on essaie de réduire voire annihiler. Ces pollutions sont par exemple des suies et oxydes de carbone. Said engine generates various types of pollution that we try to reduce or even eliminate. These pollutions are for example soot and oxides of carbon.
D’autres pollutions concernent le niveau sonore du moteur en fonctionnement. Other pollution concerns the sound level of the engine in operation.
Afin d’abaisser ce niveau sonore, il est connu de disposer des écrans de protection acoustiques enveloppant des parties du moteur, soit sur des parties émettrices de son, soit sur des parties réceptrices et aptes à réfléchir les sons. In order to lower this noise level, it is known to have acoustic protection screens enveloping parts of the engine, either on parts emitting sound, or on parts receiving and capable of reflecting sound.
La publication FR3079001-A1 propose ainsi un écran protecteur pour un filtre à air pour un moteur thermique de véhicule automobile recouvrant ledit filtre qui ne génère pas de bruits ou sons afin de réduire des réflexions de sons sur la paroi dudit filtre. Publication FR3079001-A1 thus proposes a protective screen for an air filter for a heat engine of a motor vehicle covering said filter which does not generate noise or sound in order to reduce sound reflections on the wall of said filter.
Une autre publication FR3006265-A1 divulgue un écran de protection acoustique d’un moteur de véhicule automobile à base de mousse de polyuréthane. Another publication FR3006265-A1 discloses an acoustic protection screen for a motor vehicle engine based on polyurethane foam.
Pour atteindre une efficacité optimale de protection acoustique, il est cependant nécessaire de recouvrir au plus proche les sources de bruits et de sons générés par le fonctionnement du moteur. To achieve optimum acoustic protection efficiency, it is however necessary to cover as close as possible the sources of noise and sound generated by the operation of the engine.
Des sons sont générés par les explosions dans une chambre de combustion dudit moteur, ladite chambre étant délimitée par un cylindre, une paroi inférieure d’une culasse et d’un piston coulissant selon un mouvement de va-et-vient dans ledit cylindre, lesdits cylindre, culasse et piston sont des éléments du moteur. Les bruits générés sont susceptibles de se propager dans une chambre de bielles située à une extrémité inférieure du cylindre, et dans laquelle est monté un vilebrequin mobile en rotation selon l’axe longitudinal du moteur. Sounds are generated by the explosions in a combustion chamber of said engine, said chamber being delimited by a cylinder, a lower wall of a cylinder head and a piston sliding back and forth in said cylinder, said cylinder, cylinder head and piston are engine elements. The noises generated are likely to propagate in a connecting rod chamber situated at a lower end of the cylinder, and in which is mounted a crankshaft which can rotate along the longitudinal axis of the engine.
Ledit vilebrequin débouche du carter du moteur et présente une extrémité accouplée via une roue menante de distribution à des roues d’actionnement des éléments accessoires du moteur dont la liste peut comprendre une pompe à eau, un alternateur, un arbre à cames. Said crankshaft emerges from the engine casing and has one end coupled via a drive wheel for distribution to wheels for actuating the accessory elements of the engine, the list of which may include a water pump, an alternator, a camshaft.
Les bruits sont donc susceptibles de se propager à l’extérieur du moteur, notamment à l’extérieur du carter du moteur via cette extrémité de distribution du vilebrequin. The noises are therefore likely to propagate outside the engine, in particular outside the engine casing via this timing end of the crankshaft.
On peut alors disposer un écran de protection acoustique recouvrant la face de distribution du moteur par exemple intégré à un carter de distribution recouvrant ladite face. It is then possible to arrange an acoustic protection screen covering the distribution face of the motor, for example integrated into a distribution casing covering said face.
L’efficacité de protection n’est cependant pas optimale. However, the protection efficiency is not optimal.
Le but de l’invention est de remédier à ces problèmes et un des objets de l’invention est un dispositif de protection acoustique fixée à la roue menante de vilebrequin et recouvrant ladite roue. The object of the invention is to remedy these problems and one of the objects of the invention is an acoustic protection device fixed to the crankshaft drive wheel and covering said wheel.
Présentation de l’invention Presentation of the invention
La présente invention concerne plus particulièrement un dispositif de protection acoustique pour un moteur thermique de véhicule automobile qui comprend un vilebrequin mobile en rotation autour d’un axe longitudinal du moteur et portant une roue menante de distribution,The present invention relates more particularly to an acoustic protection device for a heat engine of a motor vehicle which comprises a crankshaft movable in rotation about a longitudinal axis of the engine and carrying a driving distribution wheel,
Caractérisé en ce que ledit dispositif comprend un couvercle de protection acoustique recouvrant la roue menante de distribution. Characterized in that said device comprises an acoustic protection cover covering the driving distribution wheel.
De manière avantageuse, le dispositif de protection acoustique comprend un couvercle recouvrant la roue menante portée par l’extrémité du vilebrequin pour assurer une protection acoustique optimale contre les bruits du moteur susceptibles de passer par une ouverture du carter du moteur entourant le vilebrequin. Advantageously, the acoustic protection device comprises a cover covering the drive wheel carried by the end of the crankshaft to ensure optimum acoustic protection against engine noise likely to pass through an opening in the engine casing surrounding the crankshaft.
Selon d’autres caractéristiques de l’invention : According to other characteristics of the invention:
-le couvercle est fixé à la roue menante du vilebrequin. -the cover is attached to the driving wheel of the crankshaft.
De manière avantageuse, le couvercle est fixé solidaire de la roue menante du vilebrequin pour ne pas empêcher un accès vers d’autres pièces du moteur à proximité. Advantageously, the cover is fixed integral with the driving wheel of the crankshaft so as not to prevent access to other parts of the engine in the vicinity.
-le couvercle comprend une couche de protection acoustique tournée vers la roue menante du vilebrequin. - the cover includes an acoustic protection layer facing the driving wheel of the crankshaft.
De manière avantageuse, le couvercle comprend une couche de protection acoustique qui est en vis-à-vis de la roue menante du vilebrequin pour mieux absorber les bruits. Advantageously, the cover comprises an acoustic protection layer which faces the driving wheel of the crankshaft to better absorb noise.
-le dispositif comprend un pion de centrage angulaire. De manière avantageuse, le dispositif comprend un pion de centrage angulaire pour lier angulairement le dispositif avec la roue menante de vilebrequin mobile en rotation. Ainsi la roue menante avec le couvercle de protection acoustique forme une seule pièce tournante et présentant une isolation acoustique. -the device comprises an angular centering pin. Advantageously, the device comprises an angular centering pin to angularly link the device with the rotating crankshaft drive wheel. Thus the drive wheel with the acoustic protection cover forms a single rotating part and having acoustic insulation.
-le pion de centrage présente une partie d’ancrage noyée dans la couche de protection acoustique et un pied de fixation enfoncé dans la roue menante - the centering pin has an anchoring part embedded in the acoustic protection layer and a fixing foot sunk in the drive wheel
De manière avantageuse, le pion de centrage angulaire présente une partie d’ancrage noyée dans la couche de protection ou d’isolant acoustique pour obtenir la meilleure efficacité dudit isolant sans perturbation d’origine mécanique. Advantageously, the angular centering pin has an anchoring part embedded in the layer of protection or acoustic insulation to obtain the best efficiency of said insulation without disturbance of mechanical origin.
-le dispositif comprend des moyens de fixation rapide axiale avec la roue menante. -the device comprises axial rapid attachment means with the drive wheel.
De manière avantageuse, le dispositif comprend des moyens de fixation axiale avec la roue menante pour coller la couche d’isolant contre la roue menante. Advantageously, the device comprises means for axial attachment with the drive wheel to bond the layer of insulation against the drive wheel.
-les moyens de fixation rapide axiale comprennent des jetons cylindriques aimantés noyés dans la couche de protection présentant une face circulaire libre destiné au contact avec la roue menante. the axial quick fastening means comprise magnetic cylindrical tokens embedded in the protective layer having a free circular face intended for contact with the drive wheel.
De manière avantageuse, des jetons cylindriques aimantés sont noyés dans la couche d’isolation acoustique et présentent une face circulaire sensiblement libre pour venir au contact avec la roue menante qui est en acier. Lesdits jetons sont aptes à maintenir la couche de protection acoustique contre la roue menante de manière simple. Advantageously, magnetic cylindrical tokens are embedded in the sound insulation layer and have a substantially free circular face to come into contact with the driving wheel which is made of steel. Said tokens are able to maintain the acoustic protection layer against the drive wheel in a simple manner.
Les jetons aimantés ne nécessitent pas d’opération mécanique sur la roue menante. Magnetic tokens do not require any mechanical operation on the driving wheel.
De plus, il suffit de les arracher de la roue pour retirer et séparer la couche isolant acoustique de la roue menante. In addition, it is enough to tear them from the wheel to remove and separate the acoustic insulation layer from the drive wheel.
-les moyens de fixation rapide comprennent des moyens de fixation par clipsage. -the quick-fixing means comprise clip-fastening means.
De manière avantageuse, les moyens de fixation axiale comprennent au-moins un élément de fixation par clipsage relié à la roue menante par liaison de force Advantageously, the axial fixing means comprise at least one clip-on fixing element connected to the driving wheel by force connection
Ce moyen nécessite au moins un perçage dans la roue menante en vis-à-vis du pied de fixation de l’élément de clipsage. On a donc une fixation simple, fiable et réversible. This means requires at least one hole in the driving wheel opposite the fixing foot of the clipping element. We therefore have a simple, reliable and reversible fixing.
-le dispositif comprend une couronne de fixation fixée solidaire à la roue menante coopérant avec le couvercle de protection acoustique. -the device comprises a fastening ring fixed integral with the drive wheel cooperating with the acoustic protection cover.
De manière avantageuse, le dispositif de protection acoustique comprend une couronne de fixation solidaire de la roue menante pour faciliter l’accrochage du couvercle contre la roue menante. Advantageously, the acoustic protection device comprises a fastening ring integral with the drive wheel to facilitate the attachment of the cover against the drive wheel.
-la couronne de fixation est disposée dans le prolongement de la roue menant selon l’axe de ladite roue. De manière avantageuse, la couronne de fixation est disposée dans le prolongement axial de la roue menante pour disposer le couvercle de protection acoustique au plus près de la roue menante. -the fixing ring is arranged in the extension of the driving wheel along the axis of said wheel. Advantageously, the fixing ring is placed in the axial extension of the drive wheel to place the acoustic protection cover as close as possible to the drive wheel.
- le couvercle de protection acoustique recouvre la surface périphérique de la couronne de fixation. - the acoustic protection cover covers the peripheral surface of the fixing ring.
De manière avantageuse, le couvercle de protection acoustique recouvre la surface périphérique de la couronne de fixation pour coiffer de façon optimale la roue menante et empêcher la propagation des bruits. Advantageously, the acoustic protection cover covers the peripheral surface of the fixing ring to optimally cap the drive wheel and prevent the propagation of noise.
Brève description des figures Brief description of figures
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui suit de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés sur les dessins annexés, dans lesquels : Other characteristics and advantages of the invention will appear on reading the following description of particular embodiments of the invention given by way of non-limiting examples and represented in the appended drawings, in which:
[Fig. 1] est une vue schématique de la face de distribution du moteur thermique avec un couvercle de protection acoustique. [Fig. 1] is a schematic view of the heat engine distribution face with an acoustic protection cover.
[Fig. 2] est une vue schématique d’une roue menante portée par l’extrémité du vilebrequin.[Fig. 2] is a schematic view of a drive wheel carried by the end of the crankshaft.
[Fig. 3] est une vue schématique de coupe longitudinale de l’extrémité de distribution du vilebrequin avec la roue menante et le dispositif de protection acoustique. [Fig. 3] is a schematic longitudinal sectional view of the timing end of the crankshaft with the drive wheel and the acoustic protection device.
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires. In the following description, identical reference numerals designate identical parts or parts having similar functions.
L’invention concerne un moteur thermique ou à combustion interne de véhicule automobile.The invention relates to a thermal or internal combustion motor vehicle engine.
De manière connue, le moteur thermique 50 comprend au moins un cylindre creusé dans un carter-cylindres 51 , au-moins un piston coulissant selon un mouvement de va-et-vient dans ledit cylindre et lié par une bielle à un vilebrequin qui s’étend selon un axe longitudinal du moteur. Le mouvement de coulissement en va-et-vient du piston est ainsi transformé en mouvement de rotation du vilebrequin 52 selon la figure 1. In known manner, the heat engine 50 comprises at least one cylinder hollowed out in a cylinder block 51, at least one piston sliding according to a reciprocating movement in said cylinder and connected by a connecting rod to a crankshaft which is extends along a longitudinal axis of the engine. The reciprocating sliding movement of the piston is thus transformed into a rotational movement of the crankshaft 52 according to FIG.
Le vilebrequin est logé dans une chambre de bielles en partie inférieure du carter-cylindres et débouche du carter-cylindres pour être connecté à divers éléments du moteur grâce à un dispositif d’entrainement comprenant des roues d’entrainement. Le vilebrequin débouche ainsi de la face de distribution 53 du moteur et porte une roue menante 40 apte à entraîner en rotation via une chaîne ou une courroie de transmission au moins un pignon d’un élément accessoire (non représenté) du moteur tel qu’une pompe à eau par exemple. The crankshaft is housed in a connecting rod chamber in the lower part of the cylinder block and emerges from the cylinder block to be connected to various engine components by means of a drive device comprising drive wheels. The crankshaft thus emerges from the timing face 53 of the engine and carries a drive wheel 40 able to drive in rotation via a chain or a transmission belt at least one pinion of an accessory element (not shown) of the engine such as a water pump for example.
Le moteur est le siège de combustions qui se produisent dans au-moins une chambre à combustion disposée au dessus du au-moins un piston. Lesdites combustions génèrent donc des bruits qui peuvent se propager via le vilebrequin vers l’extérieur du moteur. On peut voir sur la figure 1 que la face de distribution 53 n’est pas totalement par un carter de distribution 54. Ledit carter de distribution 54 ne recouvre pas la roue menante 40 pour permettre par exemple l’entrainement d’autres accessoires non représentés. Les bruits générés par le fonctionnement du moteur peuvent alors s’échapper vers l’extérieur dudit moteur en passant par la roue menante 40. The engine is the seat of combustions which occur in at least one combustion chamber arranged above the at least one piston. Said combustion therefore generates noise which can propagate via the crankshaft to the outside of the engine. It can be seen in Figure 1 that the distribution face 53 is not completely by a distribution housing 54. Said distribution housing 54 does not cover the drive wheel 40 to allow for example the training of other accessories not shown . The noise generated by the operation of the engine can then escape to the outside of said engine via the drive wheel 40.
L’invention propose un dispositif de protection acoustique performant apte à empêcher la propagation des bruits provenant de l’intérieur du moteur et se propageant par le vilebrequin jusqu’à la roue menante. The invention proposes a high-performance acoustic protection device capable of preventing the propagation of noise originating from inside the engine and propagating through the crankshaft to the drive wheel.
L’invention propose un dispositif de protection acoustique 10 recouvrant uniquement la roue menante qui ici n’est pas recouverte par le carter de distribution 54. Ledit dispositif est apte à coiffer la roue menante et est maintenu en contact avec ladite roue. The invention proposes an acoustic protection device 10 covering only the drive wheel which here is not covered by the timing cover 54. Said device is able to cover the drive wheel and is kept in contact with said wheel.
Le dispositif 10 selon l’invention est disposé directement sur la roue menante 40, en appui contre une face extérieure 41 de la roue menante dirigée vers l’extérieur du moteur. The device 10 according to the invention is arranged directly on the drive wheel 40, resting against an outer face 41 of the drive wheel directed towards the outside of the engine.
Le dispositif de protection 10 comprend une couronne de fixation 11 permettant la fixation d’un couvercle 12 de protection acoustique. Ladite couronne de fixation 11 est liée solidaire à la roue menante par des vis de fixation 13 comme représenté en figure 2 ou être d’une seule pièce avec la roue menante. The protection device 10 comprises a fixing ring 11 allowing the fixing of a cover 12 for acoustic protection. Said fixing ring 11 is integrally linked to the drive wheel by fixing screws 13 as shown in Figure 2 or be in one piece with the drive wheel.
Ladite couronne de fixation 11 comprend des zones de fixation métalliques 14. Ladite couronne peut être en matière plastique mais elle présente des zones de fixation métalliques 14. Said fixing ring 11 comprises metal fixing zones 14. Said ring can be made of plastic material but it has metal fixing zones 14.
Ladite couronne 11 comprend également des ouvertures de centrage 15. Said crown 11 also includes centering openings 15.
Selon la figure 3, la roue menante 40 portée par l’extrémité 55 du vilebrequin débouchant de la face de distribution du moteur est coiffée par le couvercle de protection acoustique 12. According to figure 3, the drive wheel 40 carried by the end 55 of the crankshaft emerging from the timing face of the engine is covered by the acoustic protection cover 12.
Ledit couvercle 12 est sensiblement conique en forme de cloche et recouvre toute la face extérieure 41 de la roue menante 40 tournée vers l’extérieur du moteur. Ainsi le couvercle est apte à empêcher de façon optimale la propagation des bruits vers l’extérieur du moteur. La protection est plus efficace en disposant le dispositif de protection acoustique au plus proche de la source de bruits. Said cover 12 is substantially conical in the shape of a bell and covers the entire outer face 41 of the drive wheel 40 facing the outside of the engine. Thus the cover is able to optimally prevent the propagation of noise to the outside of the engine. Protection is more effective by placing the acoustic protection device as close as possible to the noise source.
Le couvercle 12 comporte une couche de protection 16 ou d’isolant acoustique tournée vers la roue menante 40. Cover 12 includes a layer of protection 16 or acoustic insulation facing drive wheel 40.
Ladite couche 16 peut être par exemple collée au couvercle 12 qui est de manière préférentielle en plastique pour limiter le poids et le couple du dispositif de protection 10. Said layer 16 can for example be glued to the cover 12 which is preferably made of plastic to limit the weight and the torque of the protection device 10.
Ladite couche 16 peut être également d’une seule pièce avec le couvercle 12. Said layer 16 can also be in one piece with the cover 12.
Ladite couche de protection 16 acoustique recouvre la surface périphérique circulaire 11p de la couronne de fixation 11 pour coiffer totalement la roue menante. Sur la figure 3, on peut voir que ledit dispositif 10 comprend au moins un pion de centrage 17 qui s’étend selon l’axe du couvercle X, vers la roue menante. Said acoustic protection layer 16 covers the circular peripheral surface 11p of the fixing ring 11 to completely cover the drive wheel. In Figure 3, it can be seen that said device 10 comprises at least one centering pin 17 which extends along the axis of the cover X, towards the driving wheel.
Le au-moins un pion de centrage est sensiblement tubulaire et présente une partie d’ancrage 18 noyée dans la couche de protection acoustique et un pied de fixation 19 enfoncé dans l’orifice de fixation 15 de la couronne de fixation 11 de la roue menante. Ledit pied est solidaire en rotation avec la roue menante. The at least one centering pin is substantially tubular and has an anchoring part 18 embedded in the acoustic protection layer and a fixing foot 19 pressed into the fixing hole 15 of the fixing ring 11 of the driving wheel . Said foot is integral in rotation with the drive wheel.
Le au-moins un pion de centrage 17 est reçu dans le au-moins un orifice de fixation 15 traversant la paroi de la roue menante. De manière préférentielle, les formes du pion de centrage, notamment son diamètre, sont sensiblement complémentaires de celles de l’orifice de fixation dans la roue dentée. Selon un mode de réalisation représenté en figures 2 et 3, la bordure de l’orifice de fixation présente des zones de contact avec le pion de centrage pour assurer un centrage correct du pion 17 au travers de l’orifice 15. Ainsi une fois le dispositif monté en appui contre la roue menante, le au-moins un pion de centrage 17 est enfoncé dans le au-moins un orifice de fixation 15 de la couronne de fixation 12 et de la roue menante. Ledit dispositif 10 est solidaire en rotation avec la roue menante. The at least one centering pin 17 is received in the at least one fixing hole 15 passing through the wall of the drive wheel. Preferably, the shapes of the centering pin, in particular its diameter, are substantially complementary to those of the fixing orifice in the toothed wheel. According to an embodiment represented in FIGS. 2 and 3, the edge of the fixing orifice has zones of contact with the centering pin to ensure correct centering of the pin 17 through the orifice 15. Thus once the device mounted bearing against the drive wheel, the at least one centering pin 17 is pressed into the at least one fixing hole 15 of the fixing ring 12 and the driving wheel. Said device 10 is integral in rotation with the drive wheel.
Selon la figure 3, le au-moins un pion de centrage 17 est reçu dans l’orifice de fixation 15 sensiblement oblong. According to Figure 3, the at least one centering pin 17 is received in the fixing hole 15 substantially oblong.
Le dispositif comprend également des moyens de fixation rapide 18 axiale avec la roue menante 40, notamment la couronne de fixation 11 , pour maintenir ledit dispositif 10 contre la roue menante 40. Ainsi la couche d’isolant 16 acoustique est maintenue contre ladite roue 40.The device also comprises means of rapid attachment 18 axially with the driving wheel 40, in particular the fixing ring 11, to hold said device 10 against the driving wheel 40. Thus the layer of acoustic insulation 16 is held against said wheel 40.
Selon un mode de réalisation préféré, les moyens de fixation rapide axiale 18 comprennent des jetons cylindriques 19 aimantés noyés dans la couche de protection présentant une face circulaire libre destiné au contact avec la roue menante. According to a preferred embodiment, the axial quick fastening means 18 comprise magnetic cylindrical tokens 19 embedded in the protective layer having a free circular face intended for contact with the drive wheel.
Un jeton cylindrique 19 aimanté comprend une partie d’ancrage 19a noyée dans la couche d’isolation acoustique 16 et présentent une face circulaire 20 sensiblement libre pour venir au contact avec une zone de fixation métallique de la couronne de fixation de la roue menante. Lesdits jetons sont aptes à maintenir la couche de protection acoustique contre la roue menante de manière simple. De manière avantageuse, les jetons aimantés ne nécessitent pas d’opération mécanique sur la couronne de fixation 11 de la roue menante métallique. A magnetic cylindrical token 19 comprises an anchoring part 19a embedded in the acoustic insulation layer 16 and has a circular face 20 that is substantially free to come into contact with a metal fixing zone of the driving wheel fixing crown. Said tokens are able to maintain the acoustic protection layer against the drive wheel in a simple manner. Advantageously, the magnetic tokens do not require any mechanical operation on the fixing crown 11 of the metal drive wheel.
La couronne de fixation solidaire de la roue menante peut aussi être de matière non métallique, par exemple en plastique, et présenter des zones d’accrochage 19b métalliques sur lesquelles la face 20 du jeton vient au contact. The fastening ring integral with the drive wheel can also be of non-metallic material, for example plastic, and have metallic attachment zones 19b on which the face 20 of the token comes into contact.
Il suffit d’arracher le jeton de fixation de la roue, notamment de la couronne de fixation 11 , pour retirer et séparer la couche 16 d’isolant acoustique, de la roue menante 40. It suffices to tear off the token for fixing the wheel, in particular from the fixing ring 11 , to remove and separate the layer 16 of acoustic insulation from the driving wheel 40.
Selon un autre mode de réalisation non représenté, les moyens de fixation 18 rapide comprennent des moyens de fixation par clipsage. Lesdits moyens de fixation axiale 18 comprennent au-moins un élément de fixation par clipsage noyé dans la couche d’isolant de manière par exemple semblable au au-moins un pion de centrage 19 et relié à la roue menante, notamment la couronne de fixation 11 , par liaison de force. Ce mode de réalisation nécessite au moins un perçage dans la couronne de fixation 11 de la roue menante en vis-à-vis du pied de fixation de l’élément de clipsage. According to another embodiment not shown, the quick fastening means 18 comprise clip fastening means. Said axial fixing means 18 comprise at least one clip-on fixing element embedded in the insulating layer in a similar way, for example, to at least one centering pin 19 and connected to the drive wheel, in particular the fixing ring 11 , by force connection. This embodiment requires at least one hole in the fixing ring 11 of the driving wheel opposite the fixing foot of the clipping element.
On a donc une fixation simple, fiable et réversible. We therefore have a simple, reliable and reversible fixing.
L’objectif est atteint : le dispositif de protection acoustique 10 est fixé solidaire en rotation à la roue menante de vilebrequin et recouvre ou coiffe la face extérieure 41 de ladite roue pour empêcher de façon optimale la propagation des bruits générés à l’intérieur du moteur vers l’extérieur. Le dispositif est fixé de manière amovible et simple à ladite roue menante et ne génère pas de contrainte d’encombrement pour les aménagements des autres éléments ou accessoires du moteur. The objective is achieved: the acoustic protection device 10 is fixed integral in rotation with the crankshaft drive wheel and covers or caps the outer face 41 of said wheel to optimally prevent the propagation of noise generated inside the engine. outwards. The device is fixed in a removable and simple manner to said drive wheel and does not generate any space constraints for the fittings of the other elements or accessories of the engine.
Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de cette prise, décrites ci-dessus à titre d'exemples, elle en embrasse au contraire toutes les variantes, notamment le au-moins un pion de centrage peut servir également à la fixation du dispositif contre la roue menante. It goes without saying that the invention is not limited to the single embodiments of this grip, described above by way of examples, on the contrary it embraces all the variants, in particular the at least one pawn of centering can also be used to fix the device against the driving wheel.

Claims

Revendications Claims
1. Dispositif de protection acoustique (10) pour un moteur thermique (50) de véhicule automobile qui comprend un vilebrequin mobile en rotation autour d’un axe longitudinal X du moteur et portant une roue menante (40) de distribution, 1. Acoustic protection device (10) for a heat engine (50) of a motor vehicle which comprises a movable crankshaft in rotation around a longitudinal axis X of the engine and carrying a drive wheel (40) for distribution,
Caractérisé en ce que ledit dispositif (10) comprend un couvercle de protection (12) acoustique recouvrant la roue menante (40) de distribution. Characterized in that said device (10) comprises an acoustic protective cover (12) covering the drive wheel (40) for distribution.
2. Dispositif de protection acoustique (10) selon la revendication 1, caractérisé en ce que le couvercle (12) est fixé à la roue menante (40) du vilebrequin. 2. Acoustic protection device (10) according to claim 1, characterized in that the cover (12) is fixed to the drive wheel (40) of the crankshaft.
3. Dispositif de protection acoustique (10) selon la revendication 1 ou 2, caractérisé en ce que le couvercle (12) comprend une couche de protection acoustique (16) tournée vers la roue menante (40) du vilebrequin. 3. Sound protection device (10) according to claim 1 or 2, characterized in that the cover (12) comprises a sound protection layer (16) facing the drive wheel (40) of the crankshaft.
4. Dispositif de protection acoustique (10) selon l’une quelconque des revendications 1 à 3, caractérisé en ce que le dispositif comprend un pion de centrage (17) angulaire. 4. Acoustic protection device (10) according to any one of claims 1 to 3, characterized in that the device comprises an angular centering pin (17).
5. Dispositif de protection acoustique (10) selon la revendication 4, caractérisé en ce que le pion de centrage (17) présente une partie d’ancrage (18) noyée dans la couche de protection acoustique et un pied de fixation (19) solidaire de la roue menante. 5. Acoustic protection device (10) according to claim 4, characterized in that the centering pin (17) has an anchoring part (18) embedded in the acoustic protection layer and a fixing foot (19) integral of the drive wheel.
6. Dispositif de protection acoustique (10) selon l’une quelconque des revendications 1 à 5 en combinaison avec la revendication 3, caractérisé en ce que le dispositif comprend des moyens de fixation (18) rapide axiale avec la roue menante. 6. Acoustic protection device (10) according to any one of claims 1 to 5 in combination with claim 3, characterized in that the device comprises fast axial fastening means (18) with the drive wheel.
7. Dispositif de protection acoustique (10) selon la revendication 6, caractérisé en ce que les moyens de fixation rapide (18) axiale comprennent des jetons cylindriques aimantés (19) noyés dans la couche de protection (16) présentant une face circulaire libre destinée au contact avec la roue menante. 7. Acoustic protection device (10) according to claim 6, characterized in that the quick fixing means (18) axially comprise magnetic cylindrical chips (19) embedded in the protective layer (16) having a free circular face intended in contact with the drive wheel.
8. Dispositif de protection acoustique (10) selon l’une quelconque des revendications 1 à 5, caractérisé en ce que les moyens de fixation rapide (18) comprennent des moyens de fixation par clipsage. 8. Acoustic protection device (10) according to any one of claims 1 to 5, characterized in that the quick fastening means (18) comprise clip fastening means.
9. Dispositif de protection acoustique (10) selon l’une quelconque des revendications 1 à 8, caractérisé en ce que ledit dispositif comprend une couronne de fixation (11) solidaire de la roue menante et coopérant avec le couvercle (12). 9. Acoustic protection device (10) according to any one of claims 1 to 8, characterized in that said device comprises a fixing ring (11) secured to the drive wheel and cooperating with the cover (12).
10. Dispositif de protection acoustique (10) selon la revendication 9, caractérisé en ce que la couronne de fixation (11) est disposée dans le prolongement de la roue menante (40) selon l’axe de ladite roue. 10. Acoustic protection device (10) according to claim 9, characterized in that the fixing ring (11) is arranged in the extension of the drive wheel (40) along the axis of said wheel.
11 . Dispositif de protection acoustique (10) selon la revendication 9 ou 10, caractérisée en ce que le couvercle de protection acoustique (12) recouvre la surface périphérique de la couronne de fixation (11). 11 . Acoustic protection device (10) according to Claim 9 or 10, characterized in that the acoustic protection cover (12) covers the peripheral surface of the fixing ring (11).
EP21836064.2A 2021-01-11 2021-12-07 Quick-fastening acoustic protector Pending EP4274953A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2100207A FR3118736B1 (en) 2021-01-11 2021-01-11 Quick-fit acoustic protector.
PCT/EP2021/084640 WO2022148587A1 (en) 2021-01-11 2021-12-07 Quick-fastening acoustic protector

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EP4274953A1 true EP4274953A1 (en) 2023-11-15

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EP21836064.2A Pending EP4274953A1 (en) 2021-01-11 2021-12-07 Quick-fastening acoustic protector

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EP (1) EP4274953A1 (en)
FR (1) FR3118736B1 (en)
WO (1) WO2022148587A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20111662U1 (en) * 2001-07-13 2001-10-04 Benien Produktionstechnik Gmbh Acoustic cover for at least part of an internal combustion engine, in particular an engine oil pan
KR100692069B1 (en) * 2003-11-07 2007-03-12 현대자동차주식회사 Noise cover combination structure of damper pulley
FR3006265B1 (en) 2013-05-28 2015-07-03 Cera ACOUSTIC PROTECTION SCREEN FOR A MOTOR VEHICLE ENGINE
FR3057931B1 (en) * 2016-10-25 2019-11-01 Valeo Embrayages COUPLER TORQUE TRANSMISSION DEVICE FOR A MOTOR VEHICLE
FR3079001B1 (en) 2018-03-14 2021-01-08 Renault Sas AIR FILTER WITH ACOUSTIC PROTECTION

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FR3118736A1 (en) 2022-07-15

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