WO2013124555A1 - Device for protecting an engine transmission system - Google Patents

Device for protecting an engine transmission system Download PDF

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Publication number
WO2013124555A1
WO2013124555A1 PCT/FR2013/050155 FR2013050155W WO2013124555A1 WO 2013124555 A1 WO2013124555 A1 WO 2013124555A1 FR 2013050155 W FR2013050155 W FR 2013050155W WO 2013124555 A1 WO2013124555 A1 WO 2013124555A1
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WO
WIPO (PCT)
Prior art keywords
pulley
axial
protection device
pulleys
protective device
Prior art date
Application number
PCT/FR2013/050155
Other languages
French (fr)
Inventor
Corentin Leborgne
Original Assignee
Peugeot Citroen Automobiles Sa
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Publication date
Application filed by Peugeot Citroen Automobiles Sa filed Critical Peugeot Citroen Automobiles Sa
Publication of WO2013124555A1 publication Critical patent/WO2013124555A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/02—Gearings for conveying rotary motion by endless flexible members with belts; with V-belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0073—Adaptations for fitting the engine, e.g. front-plates or bell-housings
    • F02F2007/0078—Covers for belt transmissions

Definitions

  • the invention relates to a device for protecting a transmission system of an engine.
  • the protective device is formed by a cover which is fixed to the engine, which covers a front of the engine from which projections of the pulleys of the various accessories such as an alternator, an air conditioning compressor, a steering pump assisted and an accessory belt that drives the different pulleys.
  • This hood thus protects the pulleys and the belt from external pollution, in particular splashing water coming from the wheels of the vehicle, so as to ensure the adhesion of the belt to the pulleys.
  • the invention aims to solve one or more of these disadvantages, and in particular to limit the additional size associated with the presence of the protective device.
  • the invention thus relates to a protection device of a transmission system of a motor, the system comprising pulleys mounted in rotation along axes parallel to an axial direction, and a belt of accessories connecting the pulleys to one another, the protection device having an axial surface which is perpendicular to the axial direction and which is adjacent to an axial face of at least one pulley parallel to the axial surface of the protection device, characterized in that that the axial face of a pulley adjacent to the protection device carries a first material having a first hardness different from a second hardness of a second material carried by the axial surface of the protective device so as to to allow a clearance between the protection device and the lapping pulley generated by the rotation of the pulley against the protection device.
  • the protective device having, in the axial direction, a minimum initial dimension, is mounted tight against the pulleys (by fixing it to the engine), the running-in done by the pulleys during the first turns of the motor generating a just necessary clearance between the protection device and the pulleys.
  • the first material is abrasive and has a hardness greater than the second material. As a result, the wear is made on the axial surface of the protective device.
  • the axial surface is disposed against the angular portion which is not in contact with the accessory belt, the axial face of a pulley.
  • the protective device covers at least the angular portions of the pulleys that are not covered by the accessories belt.
  • the protective device comprises a radial surface which carries the axial surface and which covers the angular portion which is not in contact with the accessory belt, a cylindrical surface of the pulley adapted to receive the accessory belt.
  • the device may comprise a radial surface which carries the axial surface and which at least partially covers the areas of the accessory belt which are not in contact with the pulleys.
  • the radial surface of the protective device bypasses a radial flange of the pulley which extends radially beyond the cylindrical surface so as to form a gutter on the side of the protective device. of the pulley. Therefore, if, despite the presence of the protective device, a pollution manages to cross the existing gap between the two lapped materials, this pollution is propelled by the centrifugal force to the gutter made in the protective device without risking to reach the cylindrical surface of the pulley due to the presence of the radial flange and the associated configuration of the protective device.
  • the invention relates to a method of setting up a device for protecting a transmission system of an engine, the transmission system comprising pulleys mounted in rotation along parallel axes. in an axial direction, and an accessories belt connecting the pulleys to one another, the pulleys bearing on an axial face a first material having a first hardness, the protection device having an axial surface which is parallel to and adjacent to the axial faces of a minus one pulley and which carries a second material having a second hardness different from the first hardness of the first material, characterized in that the protective device is fixed so that the second material is tightly mounted against the first material and a set between the protection device and the pulley is made by lapping generated by the rotation of the pulley.
  • Figure 1 is a schematic view of a protective device partially covering an accessory belt and accessory pulleys
  • FIG. 2 is a view of an axial surface of a pulley of an accessory
  • Figure 3 is an axial sectional view of a pulley of an accessory and a protective device just after the tight attachment of the latter to the accessory;
  • FIG. 4 represents the same pulley and the same protection device as in FIG. 3, after a break-in made by the rotation of the pulley;
  • Figure 5 is a view similar to Figure 4, the pulley and the protective device having particular conformations.
  • An engine group comprises an internal combustion engine and various accessories driven by the engine, such as an alternator, an air conditioning compressor, a power steering pump.
  • the motor and the accessories each have a pulley 1, each pulley 1 being mounted in rotation along axes parallel to an axial direction 2, and an accessory belt 3 ensures the transmission of the movement of the motor pulley to the accessory pulleys. by connecting the pulleys 1 between them.
  • the power unit comprises a transmission system 4 comprising the pulleys 1 and the accessory belt 3.
  • the transmission system 4 is associated with a protection device 5 which is intended to protect the transmission system 4 from external pollution.
  • the protective device 5 is formed by a shell 5 and can be attached to the motor and / or the accessory holders.
  • the protection device 5 is intended to protect only the lower part of the transmission system 4, the upper part of the latter being arranged so as not to be accessible to pollution.
  • the protection device 5 is configured so as to protect only those parts of the accessory belt 3 which is not in contact with the pulleys 1, and that the angular parts of the pulleys 1 which are not covered by the accessory belt 3.
  • the protective device 5 comprises a radial surface 6 which covers, on the one hand, the accessories belt 3 and, on the other hand, a cylindrical surface 7 of each protected pulley 1 which is adapted to receive the belt.
  • This radial surface 6 extends, in the axial direction 2, from the attachment points of the protection device 5 to beyond the accessory belt 3 and the protected pulleys 1.
  • the protection device 5 also comprises an axial surface 8 which is perpendicular to the axial direction 2 and which hangs from the radial surface 6. This axial surface 8 covers the sidewall of the accessory belt 3 and a part of an outer axial face 9 of each pulley 1 protected, the outer axial face 9 of a pulley 1 being that remote from the corresponding accessory.
  • the axial surface 8 of the protective device 5 is adjacent to the outer axial face 9 of each pulley 1 protected.
  • the protective device 5 is at a distance from the latter allowing its usual movement.
  • each pulley 1 protected carries a first material 10 which has a first hardness.
  • the first material 10 is limited to a ring on the outer axial face 9.
  • the axial surface 8 of the protective device 5 carries, meanwhile, the side adjacent to the pulley 1 protected, a second material 1 1 which has a second hardness different from the hardness of the first material 10.
  • the first material 10 is abrasive and harder than the second material 1 1 so as to allow the establishment of a game 12 between the device protection 5 and the pulley 1 protected by lapping generated by the rotation of this pulley 1 against the protection device 5.
  • the second material 1 1 may be glued, overmoulded or fixed by any other means to the axial surface 8 of the protective device 5 .
  • the second material 1 1 is mounted tight against the first material 10 (see Figure 3), the second material 1 1 being the only element of the protective device 5 to to be in contact with the protected pulleys 1, the first material 10 being the only element of the pulleys 1 protected to be in contact with the protection device 5, and the accessory belt 3 being without contact with the protection device 5.
  • the first turns of the motor, the rotation of the pulleys 1 causes the running-in of the second material January 1 and the creation of the clearance just needed between the pulleys 1 and the protection device 5 (see Figure 4).
  • the outer axial face 9 of a pulley 1 protected comprises a radial flange 13 which extends radially beyond the cylindrical surface 7.
  • the pollution that would have managed to pass through the clearance 12 existing between the pulley 1 and the protective device 5 would be projected by the centrifugal force generated by the rotation of the pulley 1 beyond the cylindrical surface 7.
  • the radial surface 6 of the protective device 5 is shaped so as to bypass this radial flange 13 so as to form a gutter 14 for receiving pollution, the gutter 14 being disposed on the side of the protection device 5 out of the pulley 1 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)

Abstract

The invention relates to a protection device (5) for protecting an engine transmission system, comprising pulleys (1) mounted to rotate about axes parallel to an axial direction (2), and an accessory belt linking the pulleys (1), said protection device (5) having an axial surface (8) perpendicular to the axial direction (2) and adjacent to an axial face (9) of a pulley (1) parallel to the axial surface (8). According to the invention, the axial face (9) bears a first material (10) having a first hardness that is different from a second hardness of a second material (11) borne by the axial surface (8), such as to allow a clearance (12) to be established between the protection device (5) and the pulley (1) by means of the lapping generated by the rotation of the pulley (1).

Description

DISPOSITIF DE PROTECTION D'UN SYSTEME DE TRANSMISSION D'UN MOTEUR  DEVICE FOR PROTECTING A SYSTEM FOR TRANSMITTING AN ENGINE
[0001] L'invention concerne un dispositif de protection d'un système de transmission d'un moteur. The invention relates to a device for protecting a transmission system of an engine.
[ooo2] Différents dispositifs de protection d'un système de transmission d'un moteur d'un véhicule sont connus. De façon classique, le dispositif de protection est formé par un capot qui est fixé au moteur, qui recouvre une façade du moteur d'où font saillie des poulies des différents accessoires tels qu'un alternateur, un compresseur de climatisation, une pompe de direction assistée et une courroie d'accessoires qui entraîne les différentes poulies. Ce capot protège ainsi les poulies et la courroie des pollutions extérieures, notamment des projections d'eau venant des roues du véhicule, de façon à assurer l'adhérence de la courroie aux poulies. [ooo2] Different protection devices of a transmission system of a motor of a vehicle are known. Conventionally, the protective device is formed by a cover which is fixed to the engine, which covers a front of the engine from which projections of the pulleys of the various accessories such as an alternator, an air conditioning compressor, a steering pump assisted and an accessory belt that drives the different pulleys. This hood thus protects the pulleys and the belt from external pollution, in particular splashing water coming from the wheels of the vehicle, so as to ensure the adhesion of the belt to the pulleys.
[ooo3] Un tel capot s'étend du moteur jusqu'au-delà des poulies, ce qui entraîne une augmentation de la longueur du groupe moteur et donc un encombrement supplémentaire. [ooo3] Such a hood extends from the engine to beyond the pulleys, which leads to an increase in the length of the power unit and therefore additional space.
[ooo4] L'invention vise à résoudre un ou plusieurs de ces inconvénients, et notamment à limiter l'encombrement supplémentaire lié à la présence du dispositif de protection. [Ooo4] The invention aims to solve one or more of these disadvantages, and in particular to limit the additional size associated with the presence of the protective device.
[ooo5] Selon un premier aspect, l'invention porte ainsi sur un dispositif de protection d'un système de transmission d'un moteur, le système comprenant des poulies montées en rotation selon des axes parallèles à une direction axiale, et une courroie d'accessoires reliant les poulies entre elles, le dispositif de protection présentant une surface axiale qui est perpendiculaire à la direction axiale et qui est adjacente à une face axiale d'au moins une poulie parallèle à la surface axiale du dispositif de protection, caractérisé en ce que la face axiale d'une poulie adjacente au dispositif de protection porte un premier matériau présentant une première dureté différente d'une seconde dureté d'un second matériau porté par la surface axiale du dispositif de protection de façon à permettre l'établissement d'un jeu entre le dispositif de protection et la poulie par rodage généré par la rotation de la poulie contre le dispositif de protection. [Ooo5] According to a first aspect, the invention thus relates to a protection device of a transmission system of a motor, the system comprising pulleys mounted in rotation along axes parallel to an axial direction, and a belt of accessories connecting the pulleys to one another, the protection device having an axial surface which is perpendicular to the axial direction and which is adjacent to an axial face of at least one pulley parallel to the axial surface of the protection device, characterized in that that the axial face of a pulley adjacent to the protection device carries a first material having a first hardness different from a second hardness of a second material carried by the axial surface of the protective device so as to to allow a clearance between the protection device and the lapping pulley generated by the rotation of the pulley against the protection device.
[0006] Ainsi, selon un choix judicieux des deux matériaux, il est possible de limiter l'encombrement lié à la présence du dispositif de protection : celui-ci présentant, selon la direction axiale, une dimension initiale minimale, est monté serré contre les poulies (par sa fixation au moteur), le rodage effectué par les poulies lors des premiers tours du moteur générant un jeu juste nécessaire entre le dispositif de protection et les poulies. Thus, according to a judicious choice of the two materials, it is possible to limit the size associated with the presence of the protective device: the latter having, in the axial direction, a minimum initial dimension, is mounted tight against the pulleys (by fixing it to the engine), the running-in done by the pulleys during the first turns of the motor generating a just necessary clearance between the protection device and the pulleys.
[ooo7] Selon un premier mode de réalisation, le premier matériau est abrasif et présente une dureté supérieure au deuxième matériau. De ce fait, l'usure est réalisée sur la surface axiale du dispositif de protection. [Ooo7] According to a first embodiment, the first material is abrasive and has a hardness greater than the second material. As a result, the wear is made on the axial surface of the protective device.
[ooo8] Selon un second mode de réalisation, la surface axiale est disposée contre la partie angulaire qui est sans contact avec la courroie d'accessoires, de la face axiale d'une poulie. De ce fait, le dispositif de protection recouvre au moins les parties angulaires des poulies qui ne sont pas recouvertes par la courroie d'accessoires. [Ooo8] According to a second embodiment, the axial surface is disposed against the angular portion which is not in contact with the accessory belt, the axial face of a pulley. As a result, the protective device covers at least the angular portions of the pulleys that are not covered by the accessories belt.
[ooo9] Selon un troisième mode de réalisation, le dispositif de protection comprend une surface radiale qui porte la surface axiale et qui recouvre la partie angulaire qui est sans contact avec la courroie d'accessoires, d'une surface cylindrique de la poulie adaptée à recevoir la courroie d'accessoires. [Ooo9] According to a third embodiment, the protective device comprises a radial surface which carries the axial surface and which covers the angular portion which is not in contact with the accessory belt, a cylindrical surface of the pulley adapted to receive the accessory belt.
[ooi o] En outre, le dispositif peut comporter une surface radiale qui porte la surface axiale et qui recouvre au moins pour partie les zones de la courroie d'accessoire qui sont sans contact avec les poulies. In addition, the device may comprise a radial surface which carries the axial surface and which at least partially covers the areas of the accessory belt which are not in contact with the pulleys.
[ooi i ] Selon un quatrième mode de réalisation, la surface radiale du dispositif de protection contourne un rebord radial de la poulie qui s'étend radialement au-delà de la surface cylindrique de façon à former une gouttière du côté du dispositif de protection hors de la poulie. De ce fait, si, malgré la présence du dispositif de protection, une pollution réussit à franchir le jeu existant entre les deux matériaux rodés, cette pollution est propulsée par la force centrifuge vers la gouttière réalisée dans le dispositif de protection sans risquer d'atteindre la surface cylindrique de la poulie du fait de la présence du rebord radial et de la configuration associée du dispositif de protection. According to a fourth embodiment, the radial surface of the protective device bypasses a radial flange of the pulley which extends radially beyond the cylindrical surface so as to form a gutter on the side of the protective device. of the pulley. Therefore, if, despite the presence of the protective device, a pollution manages to cross the existing gap between the two lapped materials, this pollution is propelled by the centrifugal force to the gutter made in the protective device without risking to reach the cylindrical surface of the pulley due to the presence of the radial flange and the associated configuration of the protective device.
[0012] Selon un second aspect, l'invention porte sur un procédé de mise en place d'un dispositif de protection d'un système de transmission d'un moteur, le système de transmission comprenant des poulies montées en rotation selon des axes parallèles à une direction axiale, et une courroie d'accessoires reliant les poulies entre elles, les poulies portant sur une face axiale un premier matériau présentant une première dureté, le dispositif de protection présentant une surface axiale qui parallèle et adjacente aux faces axiales d'au moins une poulie et qui porte un second matériau présentant une seconde dureté différente de la première dureté du premier matériau, caractérisé en ce que le dispositif de protection est fixé de sorte que le second matériau est monté serré contre le premier matériau et qu'un jeu entre le dispositif de protection et la poulie est réalisé par rodage généré par la rotation de la poulie. According to a second aspect, the invention relates to a method of setting up a device for protecting a transmission system of an engine, the transmission system comprising pulleys mounted in rotation along parallel axes. in an axial direction, and an accessories belt connecting the pulleys to one another, the pulleys bearing on an axial face a first material having a first hardness, the protection device having an axial surface which is parallel to and adjacent to the axial faces of a minus one pulley and which carries a second material having a second hardness different from the first hardness of the first material, characterized in that the protective device is fixed so that the second material is tightly mounted against the first material and a set between the protection device and the pulley is made by lapping generated by the rotation of the pulley.
[0013] D'autres caractéristiques et avantages de l'invention ressortiront clairement de la description qui en est faite ci-après, à titre indicatif et nullement limitatif, en référence aux dessins annexés, dans lesquels : Other features and advantages of the invention will emerge clearly from the description which is given below, for information only and in no way limitative, with reference to the accompanying drawings, in which:
• la figure 1 est une vue schématique d'un dispositif de protection recouvrant partiellement une courroie d'accessoires et des poulies d'accessoires ; • Figure 1 is a schematic view of a protective device partially covering an accessory belt and accessory pulleys;
• la figure 2 est une vue d'une surface axiale d'une poulie d'un accessoire ; FIG. 2 is a view of an axial surface of a pulley of an accessory;
• la figure 3 est une vue en coupe axiale d'une poulie d'un accessoire et d'un dispositif de protection juste après la fixation serrée de ce dernier à l'accessoire ; • Figure 3 is an axial sectional view of a pulley of an accessory and a protective device just after the tight attachment of the latter to the accessory;
• la figure 4 représente la même poulie et le même dispositif de protection qu'à la figure 3, après un rodage réalisé par la rotation de la poulie ; et FIG. 4 represents the same pulley and the same protection device as in FIG. 3, after a break-in made by the rotation of the pulley; and
• la figure 5 est une vue similaire à la figure 4, la poulie et le dispositif de protection ayant des conformations particulières. [0014] Un groupe moteur comprend un moteur à combustion interne et différents accessoires entraînés par le moteur, tels qu'un alternateur, un compresseur de climatisation, une pompe de direction assistée. Le moteur et les accessoires présentent chacun une poulie 1 , chaque poulie 1 étant montée en rotation selon des axes parallèles à une direction axiale 2, et une courroie d'accessoire 3 assure la transmission du mouvement de la poulie du moteur aux poulies d'accessoires en reliant les poulies 1 entre elles. Ainsi, le groupe moteur comprend un système de transmission 4 comprenant les poulies 1 et la courroie d'accessoires 3. • Figure 5 is a view similar to Figure 4, the pulley and the protective device having particular conformations. An engine group comprises an internal combustion engine and various accessories driven by the engine, such as an alternator, an air conditioning compressor, a power steering pump. The motor and the accessories each have a pulley 1, each pulley 1 being mounted in rotation along axes parallel to an axial direction 2, and an accessory belt 3 ensures the transmission of the movement of the motor pulley to the accessory pulleys. by connecting the pulleys 1 between them. Thus, the power unit comprises a transmission system 4 comprising the pulleys 1 and the accessory belt 3.
[0015] Au système de transmission 4 est associé un dispositif de protection 5 qui est destiné à protéger le système de transmission 4 des pollutions extérieures. Le dispositif de protection 5 est formé par une coque 5 et il peut être fixé au moteur et/ou aux supports d'accessoires. Dans le présent exemple, le dispositif de protection 5 n'est destiné à protéger que la partie inférieure du système de transmission 4, la partie supérieure de ce dernier étant disposée de façon à ne pas être accessible aux pollutions. De plus, comme illustré à la figure 1 , dans le présent mode de réalisation, le dispositif de protection 5 est configuré de façon à ne protéger que les parties de la courroie d'accessoires 3 qui est sans contact avec les poulies 1 , et que les parties angulaires des poulies 1 qui ne sont pas recouvertes par la courroie d'accessoires 3. The transmission system 4 is associated with a protection device 5 which is intended to protect the transmission system 4 from external pollution. The protective device 5 is formed by a shell 5 and can be attached to the motor and / or the accessory holders. In the present example, the protection device 5 is intended to protect only the lower part of the transmission system 4, the upper part of the latter being arranged so as not to be accessible to pollution. Moreover, as illustrated in FIG. 1, in the present embodiment, the protection device 5 is configured so as to protect only those parts of the accessory belt 3 which is not in contact with the pulleys 1, and that the angular parts of the pulleys 1 which are not covered by the accessory belt 3.
[0016] Le dispositif de protection 5 comprend une surface radiale 6 qui recouvre, d'une part, la courroie d'accessoires 3 et, d'autre part, une surface cylindrique 7 de chaque poulie 1 protégée qui est adaptée à recevoir la courroie d'accessoires 3. Cette surface radiale 6 s'étend, selon la direction axiale 2, depuis les points de fixation du dispositif de protection 5 jusqu'au-delà de la courroie d'accessoires 3 et des poulies 1 protégées. The protective device 5 comprises a radial surface 6 which covers, on the one hand, the accessories belt 3 and, on the other hand, a cylindrical surface 7 of each protected pulley 1 which is adapted to receive the belt. This radial surface 6 extends, in the axial direction 2, from the attachment points of the protection device 5 to beyond the accessory belt 3 and the protected pulleys 1.
[0017] Le dispositif de protection 5 comprend également une surface axiale 8 qui est perpendiculaire à la direction axiale 2 et qui pend de la surface radiale 6. Cette surface axiale 8 recouvre le flanc de la courroie d'accessoires 3 et une partie d'une face axiale externe 9 de chaque poulie 1 protégée, la face axiale externe 9 d'une poulie 1 étant celle éloignée de l'accessoire correspondant. La surface axiale 8 du dispositif de protection 5 est adjacente à la face axiale externe 9 de chaque poulie 1 protégée. The protection device 5 also comprises an axial surface 8 which is perpendicular to the axial direction 2 and which hangs from the radial surface 6. This axial surface 8 covers the sidewall of the accessory belt 3 and a part of an outer axial face 9 of each pulley 1 protected, the outer axial face 9 of a pulley 1 being that remote from the corresponding accessory. The axial surface 8 of the protective device 5 is adjacent to the outer axial face 9 of each pulley 1 protected.
[0018] Par rapport à la courroie d'accessoires 3, le dispositif de protection 5 est à une distance de cette dernière permettant son débattement usuel. Compared to the accessory belt 3, the protective device 5 is at a distance from the latter allowing its usual movement.
[ooi 9] La face axiale externe 9 de chaque poulie 1 protégée porte un premier matériau 10 qui présente une première dureté. Comme illustré à la figure 2, le premier matériau 10 est limité à une couronne sur la face axiale externe 9. La surface axiale 8 du dispositif de protection 5 porte, quant à elle, du côté adjacent à la poulie 1 protégée, un second matériau 1 1 qui présente une seconde dureté différente de la dureté du premier matériau 10. De préférence, le premier matériau 10 est abrasif et plus dur que le second matériau 1 1 de façon à permettre l'établissement d'un jeu 12 entre le dispositif de protection 5 et la poulie 1 protégée par rodage généré par la rotation de cette poulie 1 contre le dispositif de protection 5. Le second matériau 1 1 peut être collé, surmoulé ou fixé par tout autre moyen à la surface axiale 8 du dispositif de protection 5. [Ooi 9] The outer axial face 9 of each pulley 1 protected carries a first material 10 which has a first hardness. As illustrated in Figure 2, the first material 10 is limited to a ring on the outer axial face 9. The axial surface 8 of the protective device 5 carries, meanwhile, the side adjacent to the pulley 1 protected, a second material 1 1 which has a second hardness different from the hardness of the first material 10. Preferably, the first material 10 is abrasive and harder than the second material 1 1 so as to allow the establishment of a game 12 between the device protection 5 and the pulley 1 protected by lapping generated by the rotation of this pulley 1 against the protection device 5. The second material 1 1 may be glued, overmoulded or fixed by any other means to the axial surface 8 of the protective device 5 .
[0020] Ainsi, lors de la fixation du dispositif de protection 5, le second matériau 1 1 est monté serré contre le premier matériau 10 (cf. figure 3), le second matériau 1 1 étant le seul élément du dispositif de protection 5 à être en contact avec les poulies 1 protégées, le premier matériau 10 étant le seul élément des poulies 1 protégées à être en contact avec le dispositif de protection 5, et la courroie d'accessoires 3 étant sans contact avec le dispositif de protection 5. Dès les premiers tours du moteur, la rotation des poulies 1 entraîne le rodage du second matériau 1 1 et la création du jeu 12 juste nécessaire entre les poulies 1 et le dispositif de protection 5 (cf. figure 4). Thus, during the fixing of the protective device 5, the second material 1 1 is mounted tight against the first material 10 (see Figure 3), the second material 1 1 being the only element of the protective device 5 to to be in contact with the protected pulleys 1, the first material 10 being the only element of the pulleys 1 protected to be in contact with the protection device 5, and the accessory belt 3 being without contact with the protection device 5. the first turns of the motor, the rotation of the pulleys 1 causes the running-in of the second material January 1 and the creation of the clearance just needed between the pulleys 1 and the protection device 5 (see Figure 4).
[0021 ] Par ailleurs, dans l'exemple illustré à la figure 5, afin d'éviter tout contact des pollutions avec la surface cylindrique 7 des poulies 1 et la courroie d'accessoires 3, la face axiale externe 9 d'une poulie 1 protégée comprend un rebord radial 13 qui s'étend radialement au-delà de la surface cylindrique 7. De cette façon, la pollution qui aurait réussi à passer par le jeu 12 existant entre la poulie 1 et le dispositif de protection 5 serait projeté par la force centrifuge générée par la rotation de la poulie 1 au-delà de la surface cylindrique 7. De même, la surface radiale 6 du dispositif de protection 5 est conformée de façon à contourner ce rebord radial 13 de façon à former une gouttière 14 de réception des pollutions, la gouttière 14 étant disposée du côté du dispositif de protection 5 hors de la poulie 1 . Moreover, in the example illustrated in Figure 5, to avoid contact pollution with the cylindrical surface 7 of the pulleys 1 and the accessory belt 3, the outer axial face 9 of a pulley 1 protected comprises a radial flange 13 which extends radially beyond the cylindrical surface 7. In this way, the pollution that would have managed to pass through the clearance 12 existing between the pulley 1 and the protective device 5 would be projected by the centrifugal force generated by the rotation of the pulley 1 beyond the cylindrical surface 7. From even, the radial surface 6 of the protective device 5 is shaped so as to bypass this radial flange 13 so as to form a gutter 14 for receiving pollution, the gutter 14 being disposed on the side of the protection device 5 out of the pulley 1 .

Claims

REVENDICATIONS
1. Ensemble comportant un système de transmission (4) d'un moteur et un dispositif de protection (5) du système de transmission (4), le système de transmission (4) comprenant des poulies (1 ) montées en rotation selon des axes parallèles à une direction axiale (2), et une courroie d'accessoires (3) reliant les poulies (1 ) entre elles, le dispositif de protection (5) présentant une surface axiale (8) qui est perpendiculaire à la direction axiale (2) et qui est adjacente à une face axiale (9) d'au moins une poulie (1 ) parallèle à la surface axiale (8) du dispositif de protection (5), caractérisé en ce que la face axiale (9) d'une poulie (1 ) adjacente au dispositif de protection (5) porte un premier matériau (10) présentant une première dureté différente d'une seconde dureté d'un second matériau (1 1 ) porté par la surface axiale (8) du dispositif de protection (5) de façon à permettre l'établissement d'un jeu (12) entre le dispositif de protection (5) et la poulie (1 ) par rodage généré par la rotation de la poulie (1 ) contre le dispositif de protection (5). An assembly comprising a transmission system (4) of an engine and a protection device (5) of the transmission system (4), the transmission system (4) comprising pulleys (1) rotatably mounted along axes. parallel to an axial direction (2), and an accessory belt (3) connecting the pulleys (1) to one another, the protection device (5) having an axial surface (8) which is perpendicular to the axial direction (2). ) and which is adjacent to an axial face (9) of at least one pulley (1) parallel to the axial surface (8) of the protection device (5), characterized in that the axial face (9) of a pulley (1) adjacent to the protective device (5) carries a first material (10) having a first hardness different from a second hardness of a second material (1 1) carried by the axial surface (8) of the protective device (5) so as to allow the establishment of a clearance (12) between the protection device (5) and the lie (1) by lapping generated by the rotation of the pulley (1) against the protection device (5).
2. Ensemble selon la revendication 1 , caractérisé en ce que le premier matériau2. The assembly of claim 1, characterized in that the first material
(10) est abrasif et présente une dureté supérieure au deuxième matériau(10) is abrasive and has a hardness greater than the second material
(1 1 ) . (1 1).
3. Ensemble selon l'une des revendications 1 et 2, caractérisé en ce que la surface axiale (8) est disposée contre la partie angulaire qui est sans contact avec la courroie d'accessoires (3), de la face axiale (9) d'une poulie (1 ). 3. Assembly according to one of claims 1 and 2, characterized in that the axial surface (8) is disposed against the angular portion which is not in contact with the accessory belt (3), the axial face (9) a pulley (1).
4. Ensemble selon l'une des revendications 1 à 3, caractérisé en ce qu'il comprend une surface radiale (6) qui porte la surface axiale (8) et qui recouvre la partie angulaire qui est sans contact avec la courroie d'accessoires (3), d'une surface cylindrique (7) de la poulie (1 ) adaptée à recevoir la courroie d'accessoires (3). 4. Assembly according to one of claims 1 to 3, characterized in that it comprises a radial surface (6) which carries the axial surface (8) and which covers the angular portion which is without contact with the accessories belt (3), a cylindrical surface (7) of the pulley (1) adapted to receive the accessory belt (3).
5. Ensemble selon l'une des revendications 1 à 4, caractérisé en ce qu'il comprend une surface radiale (6) qui porte la surface axiale (8) et qui recouvre au moins pour partie les zones de la courroie d'accessoire (3) qui sont sans contact avec les poulies (1 ). 5. An assembly according to one of claims 1 to 4, characterized in that it comprises a radial surface (6) which carries the axial surface (8) and which covers at least part of the zones of the accessory belt ( 3) which are not in contact with the pulleys (1).
6. Ensemble selon la revendication 4 ou la revendication 5, caractérisé en ce que la surface radiale (6) du dispositif de protection (5) contourne un rebord radial (13) de la poulie (1 ) qui s'étend radialement au-delà de la surface cylindrique (7) de façon à former une gouttière (14) du côté du dispositif de protection (5) hors de la poulie (1 ). 6. An assembly according to claim 4 or claim 5, characterized in that the radial surface (6) of the protective device (5) bypasses a rim radial (13) of the pulley (1) which extends radially beyond the cylindrical surface (7) so as to form a gutter (14) on the side of the protection device (5) out of the pulley (1) .
7. Procédé de mise en place d'un ensemble selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de protection (5) est fixé de sorte que le second matériau (1 1 ) est monté serré contre le premier matériau (10) et qu'un jeu (12) entre le dispositif de protection (5) et la poulie (1 ) est réalisé par rodage généré par la rotation de la poulie (1 ). 7. A method of setting up an assembly according to any one of the preceding claims, characterized in that the protective device (5) is fixed so that the second material (1 1) is mounted tight against the first material (10) and that a clearance (12) between the protective device (5) and the pulley (1) is produced by lapping generated by the rotation of the pulley (1).
PCT/FR2013/050155 2012-02-23 2013-01-25 Device for protecting an engine transmission system WO2013124555A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1251680A FR2987415B1 (en) 2012-02-23 2012-02-23 DEVICE FOR PROTECTING A SYSTEM FOR TRANSMITTING AN ENGINE
FR1251680 2012-02-23

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180343A (en) * 1991-12-16 1993-01-19 Reed Michael A Pulley guard apparatus
DE4243168C1 (en) * 1992-12-19 1994-03-31 Freudenberg Carl Fa Reciprocating engine or machine - has housing with internal Helmholtz resonator, both made of deep-drawn synthetic foil, resonator being of two parts of different depths
JPH09250355A (en) * 1996-03-13 1997-09-22 Mitsubishi Automob Eng Co Ltd Timing belt cover of internal combustion engine
JPH10296599A (en) * 1997-04-22 1998-11-10 Mitsuboshi Belting Ltd Automatic deburring device for v belt and automatic deburring method
US20100196183A1 (en) * 2009-02-03 2010-08-05 Shimao Ni Scroll compressor with materials to allow run-in

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180343A (en) * 1991-12-16 1993-01-19 Reed Michael A Pulley guard apparatus
DE4243168C1 (en) * 1992-12-19 1994-03-31 Freudenberg Carl Fa Reciprocating engine or machine - has housing with internal Helmholtz resonator, both made of deep-drawn synthetic foil, resonator being of two parts of different depths
JPH09250355A (en) * 1996-03-13 1997-09-22 Mitsubishi Automob Eng Co Ltd Timing belt cover of internal combustion engine
JPH10296599A (en) * 1997-04-22 1998-11-10 Mitsuboshi Belting Ltd Automatic deburring device for v belt and automatic deburring method
US20100196183A1 (en) * 2009-02-03 2010-08-05 Shimao Ni Scroll compressor with materials to allow run-in

Also Published As

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FR2987415B1 (en) 2014-04-18
FR2987415A1 (en) 2013-08-30

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