EP4077974A1 - Lubrication device and gearbox shaftline - Google Patents

Lubrication device and gearbox shaftline

Info

Publication number
EP4077974A1
EP4077974A1 EP20820221.8A EP20820221A EP4077974A1 EP 4077974 A1 EP4077974 A1 EP 4077974A1 EP 20820221 A EP20820221 A EP 20820221A EP 4077974 A1 EP4077974 A1 EP 4077974A1
Authority
EP
European Patent Office
Prior art keywords
shaft
line
lubrication
gearbox
oil
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
EP20820221.8A
Other languages
German (de)
French (fr)
Inventor
Paulo Da Silva
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.)
New H Powertrain Holding SLU
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 EP4077974A1 publication Critical patent/EP4077974A1/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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0426—Means for guiding lubricant into an axial channel of a shaft
    • 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
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • F16H3/091—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft
    • F16H3/0915—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft with coaxial input and output shafts
    • 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
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/043—Guidance of lubricant within rotary parts, e.g. axial channels or radial openings in shafts
    • 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
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • F16H57/0471—Bearing
    • 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
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0493—Gearings with spur or bevel gears
    • F16H57/0494—Gearings with spur or bevel gears with variable gear ratio or for reversing rotary motion
    • 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
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0052—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising six forward speeds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Definitions

  • the present invention relates to the lubrication of components of an internal mechanism of a gearbox with parallel shafts.
  • a device for lubricating a line of gearbox shafts comprising at least one shaft inside which is formed an axial bore for the flow of oil and several bores extending radially from the latter to the right of targeted lubrication zones of the gearbox.
  • the present invention also relates to a line of gearbox shafts, provided with such a lubrication device.
  • a line of gearbox shafts includes at least one shaft carrying fixed gears, idler gears, needle cages or bearings, and synchronizing groups. All rotating parts on the shaft must be lubricated to prevent them from seizing up. Oil must always be supplied to their area of contact with the shaft. When the shaft is hollow, oil is routed to these targeted lubrication points inside the shaft.
  • the oil is collected at the bottom of the gearbox, in particular in the part containing the differential ring gear.
  • the oil is projected throughout the gearbox by rotating mechanical parts that rotate at the bottom of the gearbox, such as the ring gear of the differential.
  • the oil can be collected at the top of the gearbox, through chutes, facilitating its introduction inside a hollow shaft, where it flows to targeted lubrication points, for example to the right of the pinions. crazy running crazy on the shaft, or its bearings.
  • a device for forced lubrication of gear wheels comprising a supply cannula, fixed inside a hollow gearbox shaft, and pierced with targeted lubrication holes on the pinions.
  • the introduction of the oil inside the shaft is carried out from one of its ends.
  • the elements to be lubricated, the furthest from the oil inlet, are penalized compared to the others.
  • their lubrication becomes problematic, because the oil no longer necessarily reaches the end of the shaft lines. This problem is particularly noticeable in certain six-speed forward gearboxes, or gearboxes. hybrid vehicle, stacking on the same line of shafts the movement descent gears of a heat engine, and of an electric machine.
  • the present invention aims to improve the lubrication of a transmission shaft line.
  • the targeted lubrication areas include at least one idler of the shaft line, and / or bearings of the shaft line.
  • FIG. 1 illustrates a known lubrication device.
  • FIG. 2 illustrates the proposed device.
  • lubricating the rotating parts associated with a transmission shaft line is a necessity.
  • the oil circulates inside an axial bore, then passes through radial bores arranged in line with the parts to be lubricated.
  • the oil is introduced through one end of the shaft line (by a pump, by gravity ). It enters the shaft through its axial bore, and traverses it. Thanks to centrifugal force, the oil is pressed onto the outer faces of the borehole, and escapes through the radial bores. Much of it is captured by the first holes encountered, so that the following are at a disadvantage because they receive less oil.
  • the latter parts are therefore less well lubricated than the former, depending on their axial position and the total number of lubrication points.
  • FIG. 1 shows in section a line of shafts 1 of a hybrid gearbox (not shown entirely), and its lubricating device.
  • the line of shafts in FIGS. 1 and 2 is composed of a first hollow shaft 2 carrying an electrical machine 3, and of a second solid shaft 4 coaxial therewith, connected to a heat engine (not shown).
  • the solid shaft 4 rotates in the hollow shaft 2. It is carried by two bearings 5, 6, inside the latter.
  • An axial oil flow bore 7, as well as several bores 8a, 8b, 8c, starting radially therefrom, are formed in the shaft 4.
  • the radial bores 8a, 8b, 8c are arranged in line with zones of targeted lubrication, respectively between the two bearings 5 and 6, and to the right of two idler gears 9, 10.
  • the arrows in the diagram show that the majority of the oil mainly benefits the two bearings 5, 6, so that the two idler gears 9, 10, further away from the entry of the axial bore 7, are less well lubricated.
  • the example described relates to a gearbox supporting an electric machine 3, the length of which is added to that of the gearbox mechanism.
  • the same problem can be encountered on all long gearboxes, especially six-speed gearboxes.
  • the invention proposes to add a rotating cannula 11, arranged upstream of the targeted lubrication zones, in the flow of oil flow to inside the tree line.
  • the cannula 11 appears in FIG. 2. It has a section 11a for concentrating and guiding the flow of oil towards the inlet of the second shaft 4 of the line.
  • the second shaft 4 still has an axial oil flow bore 7 and several radial bores 8a, 8b, 8c, in line with targeted lubrication areas.
  • the cannula 11 allows the oil to be conveyed to these three bores 8a, 8b, 8c, instead of it being monopolized by the bearings 5 and 6, as in FIG. 1.
  • the targeted lubrication zones include at least an idle pinion 9, 10 of the line of shafts 3, 4, and bearings 5, 6, of the line of shafts.
  • these are bearings of the second shaft 4 inside the first 2. This bore opens between the bearings 5, 6.
  • the cannula 11 is clamped in the first. the shaft 4, upstream of the entry into the bore 7 of the second shaft 4. It forms a rotating funnel with the first shaft 2, and directing the oil towards the entry of the second 4.
  • the invention therefore proposes a line of shafts 2, 4, gearbox, comprising such a lubrication device.
  • the cannula 11 makes it possible to effectively lubricate both the bearings 5, 6, of the second shaft 4 in the first 2, and idle pinions 9, 10, carried by the second shaft.
  • the cannula 11 can be arranged differently in the line of shafts, provided that it is fixed inside one of them, so as to rotate integrally therewith by channeling the shaft. oil to the second.
  • the length and diameter of the cannula can be adapted to each gearbox environment, to meet specific needs, for example the lubrication of pinions and bearings between two shafts, or between a shaft and the gearbox housing.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

Disclosed is a device for lubricating a gearbox shaftline (2, 4) comprising at least one shaft (4) inside which there are provided an axial oil flow bore (7) and several bores (8a, 8b, 8c) extending radially therefrom in line with targeted lubrication areas of the gearbox, characterised in that it comprises a rotating cannula (11) arranged upstream of the targeted lubrication areas, in the oil flow stream inside the shaftline.

Description

Titre de l’invention : DISPOSITIF DE LUBRIFICATION ET LIGNE D’ARBRES DE BOITE DE VITESSES Title of the invention: LUBRICATION DEVICE AND GEARBOX SHAFT LINE
La présente invention se rapporte à la lubrification de composants d’un mécanisme intérieur de boîte de vitesses à arbres parallèles. The present invention relates to the lubrication of components of an internal mechanism of a gearbox with parallel shafts.
Plus précisément, elle a pour objet un dispositif de lubrification d’une ligne d’arbres de boîte de vitesses, comprenant au moins un arbre à l’intérieur duquel est ménagé un perçage axial d’écoulement d’huile et plusieurs perçages partant radialement de celui- ci au droit de zones de lubrification ciblées de la boîte. More precisely, it relates to a device for lubricating a line of gearbox shafts, comprising at least one shaft inside which is formed an axial bore for the flow of oil and several bores extending radially from the latter to the right of targeted lubrication zones of the gearbox.
La présente invention a également pour objet une ligne d’arbres de boîtes de vitesses, munie d’un tel dispositif de lubrification. The present invention also relates to a line of gearbox shafts, provided with such a lubrication device.
Une ligne d’arbres de boîte de vitesses, comprend au moins un arbre portant des pignons fixes, des pignons fous, des cages à aiguilles ou des roulements, et des groupes synchroniseurs. Tous les éléments en rotation sur l’arbre doivent être lubrifiés, pour éviter qu’ils se grippent II est nécessaire de faire parvenir de l’huile en permanence au niveau de leur zone de contact avec l’arbre. Lorsque l’arbre est creux, l’huile est acheminée sur ces points de lubrification ciblés à l’intérieur de l’arbre. A line of gearbox shafts includes at least one shaft carrying fixed gears, idler gears, needle cages or bearings, and synchronizing groups. All rotating parts on the shaft must be lubricated to prevent them from seizing up. Oil must always be supplied to their area of contact with the shaft. When the shaft is hollow, oil is routed to these targeted lubrication points inside the shaft.
En l’absence de pompe de lubrification, l’huile est récupérée au fond de la boîte, en particulier dans la partie renfermant la couronne de différentiel. Avec ce type de lubrification par bain d’huile, l’huile est projetée dans toute la boîte par la mise en rotation des éléments mécaniques qui tournent au fond de celle-ci, comme la couronne du différentiel. L’huile peut être récupérée dans le haut de la boîte, par des goulottes, facilitant son introduction à l’intérieur d’un arbre creux, où elle s’écoule jusqu’à des points de lubrification ciblés, par exemple au droit des pignons fous tournant fou sur l’arbre, ou de ses roulements. In the absence of a lubrication pump, the oil is collected at the bottom of the gearbox, in particular in the part containing the differential ring gear. With this type of oil bath lubrication, the oil is projected throughout the gearbox by rotating mechanical parts that rotate at the bottom of the gearbox, such as the ring gear of the differential. The oil can be collected at the top of the gearbox, through chutes, facilitating its introduction inside a hollow shaft, where it flows to targeted lubrication points, for example to the right of the pinions. crazy running crazy on the shaft, or its bearings.
Par la publication FR 2 877065, on connaît un dispositif de lubrification forcé de roues d’engrenages, comprenant une canule d’alimentation, fixée à l’intérieur d’un arbre creux de boîte de vitesses, et percée de trous de lubrification ciblés sur les pignons. Dans cet exemple, l’introduction de l’huile à l’intérieur de l’arbre, s’effectue à partir d’une de ses extrémités. Les éléments à lubrifier, les plus éloignés de l’entrée d’huile, sont pénalisés par rapport aux autres. Avec l’augmentation de la longueur des boîtes de vitesses, leur lubrification devient problématique, car l’huile ne parvient plus forcément jusqu’au bout des lignes d’arbres. Ce problème est particulièrement sensible dans certaines boîtes de vitesses à six rapports de marche avant, ou des boîtes de véhicule hybride, empilant sur une même ligne d’arbres des pignons de descente de mouvement d’un moteur thermique, et d’une machine électrique. From publication FR 2 877065, a device for forced lubrication of gear wheels is known, comprising a supply cannula, fixed inside a hollow gearbox shaft, and pierced with targeted lubrication holes on the pinions. In this example, the introduction of the oil inside the shaft is carried out from one of its ends. The elements to be lubricated, the furthest from the oil inlet, are penalized compared to the others. With the increase in the length of gearboxes, their lubrication becomes problematic, because the oil no longer necessarily reaches the end of the shaft lines. This problem is particularly noticeable in certain six-speed forward gearboxes, or gearboxes. hybrid vehicle, stacking on the same line of shafts the movement descent gears of a heat engine, and of an electric machine.
La présente invention vise à améliorer la lubrification d’une ligne d’arbre de boîte de vitesses. The present invention aims to improve the lubrication of a transmission shaft line.
Dans ce but, elle propose de disposer une canule tournante en amont des zones de lubrification ciblées, dans le flux d’écoulement d’huile à l’intérieur de la ligne d’arbres. De préférence, les zones de lubrification ciblée incluent au moins un pignon fou de la ligne d’arbres, et/ou des roulements de la ligne d’arbres. To this end, it proposes to arrange a rotating cannula upstream of the targeted lubrication areas, in the oil flow stream within the shaft line. Preferably, the targeted lubrication areas include at least one idler of the shaft line, and / or bearings of the shaft line.
La présente invention sera mieux comprise à la lecture de la description suivante d’un mode de réalisation non limitatif de celle-ci, en se reportant aux dessins annexés.The present invention will be better understood on reading the following description of a non-limiting embodiment thereof, with reference to the accompanying drawings.
[Fig. 1] illustre un dispositif de lubrification connu. [Fig. 1] illustrates a known lubrication device.
[Fig. 2] illustre le dispositif proposé. [Fig. 2] illustrates the proposed device.
Comme indiqué ci-dessus, la lubrification des pièces tournantes associées à une ligne d’arbres de boîte de vitesses est une nécessité. Pour parvenir jusqu’aux composants tournant autour d’un arbre, l’huile circule à l’intérieur d’un perçage axial, puis emprunte des perçages radiaux disposés au droit des pièces à lubrifier. L’huile est introduite par une extrémité de la ligne d’arbres (par une pompe, par gravité...). Elle pénètre dans l’arbre par son perçage axial, et parcourt celui-ci. Grâce à la force centrifuge, l’huile est plaquée sur les faces extérieures du perçage, et s’échappe par les perçages radiaux. Elle est captée en grande partie par les premiers perçages rencontrés, de sorte que les suivants sont défavorisés, car ils reçoivent moins d’huile. Les dernières pièces sont donc moins bien lubrifiées que les premières, selon leur position axiale et le nombre total de points de lubrification. As noted above, lubricating the rotating parts associated with a transmission shaft line is a necessity. To reach the components rotating around a shaft, the oil circulates inside an axial bore, then passes through radial bores arranged in line with the parts to be lubricated. The oil is introduced through one end of the shaft line (by a pump, by gravity ...). It enters the shaft through its axial bore, and traverses it. Thanks to centrifugal force, the oil is pressed onto the outer faces of the borehole, and escapes through the radial bores. Much of it is captured by the first holes encountered, so that the following are at a disadvantage because they receive less oil. The latter parts are therefore less well lubricated than the former, depending on their axial position and the total number of lubrication points.
Ce problème est illustré de façon non limitative par la figure 1 , montrant en section une ligne d’arbres 1 de boîte de vitesses hybride (non représentée entièrement), et son dispositif de lubrification. La ligne d’arbres des figures 1 et 2, est composée d’un premier arbre creux 2 portant une machine électrique 3, et d’un deuxième arbre plein 4 coaxial à celui-ci, relié à un moteur thermique (non représenté). L’arbre plein 4 tourne dans l’arbre creux 2. Il est porté par deux roulements 5, 6, à l’intérieur de celui-ci. Un perçage axial d’écoulement d’huile 7, ainsi que plusieurs perçages 8a, 8b, 8c, partant radialement de celui-ci sont ménagés dans l’arbre 4. Les perçages radiaux 8a, 8b, 8c, sont disposés au droit de zones de lubrification ciblées, respectivement entre les deux roulements 5 et 6, et au droit de deux pignons fous 9, 10. Les flèches du schéma montrent que la majorité de l’huile bénéficie principalement aux deux roulements 5, 6, de sorte que les deux pignons fous 9, 10, plus éloignés de l’entrée du perçage axial 7, sont moins bien lubrifiés. This problem is illustrated in a non-limiting manner by FIG. 1, showing in section a line of shafts 1 of a hybrid gearbox (not shown entirely), and its lubricating device. The line of shafts in FIGS. 1 and 2 is composed of a first hollow shaft 2 carrying an electrical machine 3, and of a second solid shaft 4 coaxial therewith, connected to a heat engine (not shown). The solid shaft 4 rotates in the hollow shaft 2. It is carried by two bearings 5, 6, inside the latter. An axial oil flow bore 7, as well as several bores 8a, 8b, 8c, starting radially therefrom, are formed in the shaft 4. The radial bores 8a, 8b, 8c, are arranged in line with zones of targeted lubrication, respectively between the two bearings 5 and 6, and to the right of two idler gears 9, 10. The arrows in the diagram show that the majority of the oil mainly benefits the two bearings 5, 6, so that the two idler gears 9, 10, further away from the entry of the axial bore 7, are less well lubricated.
En résumé, plus les points à lubrifier sont distants de l’arrivée d’huile, plus ils sont difficiles à lubrifier. L’exemple décrit est relatif à une boîte de vitesses supportant une machine électrique 3, dont la longueur s’ajoute à celle du mécanisme de la boîte. Le même problème peut se rencontrer sur toutes les boîtes de grande longueur, notamment les boîtes à six rapports. In short, the farther away the points to be lubricated are from the oil inlet, the more difficult they are to lubricate. The example described relates to a gearbox supporting an electric machine 3, the length of which is added to that of the gearbox mechanism. The same problem can be encountered on all long gearboxes, especially six-speed gearboxes.
Pour aider l’acheminement de l’huile jusqu’aux éléments les plus lointains de la source, l’invention propose de rapporter une canule tournante 11 , disposée en amont des zones de lubrification ciblées, dans le flux d’écoulement d’huile à l’intérieur de la ligne d’arbres. La canule 11 , apparait sur la figure 2. Elle présente une section 11a de concentration et de guidage du flux d’huile vers l’entrée du deuxième arbre 4 de la ligne. Le deuxième arbre 4 présente toujours un perçage axial 7 d’écoulement d’huile et plusieurs perçages radiaux 8a, 8b, 8c, au droit de zones de lubrification ciblées. La canule 11 permet d’acheminer l’huile jusqu’à ces trois perçages 8a, 8b, 8c, au lieu qu’elle soit accaparée par les roulements 5 et 6, comme sur la figure 1. Les zones de lubrification ciblée incluent au moins un pignon fou 9, 10 de la ligne d’arbres 3, 4, et des roulements 5, 6, de la ligne d’arbres. Dans l’exemple de réalisation non limitatif illustré par la figure 2, il s’agit de roulements du deuxième arbre 4 à l’intérieur du premier 2. Ce perçage débouche entre des roulements 5, 6. La canule 11 est serrée dans le premier l’arbre 4, en amont de l’entrée dans le perçage 7 du deuxième arbre 4. Elle forme un entonnoir tournant avec le premier arbre 2, et orientant l’huile vers l’entrée du deuxième 4. To help the delivery of the oil to the most distant elements of the source, the invention proposes to add a rotating cannula 11, arranged upstream of the targeted lubrication zones, in the flow of oil flow to inside the tree line. The cannula 11 appears in FIG. 2. It has a section 11a for concentrating and guiding the flow of oil towards the inlet of the second shaft 4 of the line. The second shaft 4 still has an axial oil flow bore 7 and several radial bores 8a, 8b, 8c, in line with targeted lubrication areas. The cannula 11 allows the oil to be conveyed to these three bores 8a, 8b, 8c, instead of it being monopolized by the bearings 5 and 6, as in FIG. 1. The targeted lubrication zones include at least an idle pinion 9, 10 of the line of shafts 3, 4, and bearings 5, 6, of the line of shafts. In the non-limiting example of embodiment illustrated by FIG. 2, these are bearings of the second shaft 4 inside the first 2. This bore opens between the bearings 5, 6. The cannula 11 is clamped in the first. the shaft 4, upstream of the entry into the bore 7 of the second shaft 4. It forms a rotating funnel with the first shaft 2, and directing the oil towards the entry of the second 4.
L’invention propose donc une ligne d’arbres 2, 4, de boîte de vitesses, comportant un tel dispositif de lubrification. Dans cet agencement, la canule 11 permet de lubrifier efficacement à la fois des roulements 5, 6, du deuxième arbre 4 dans le premier 2, et des pignons fous 9, 10, portés par le deuxième arbre. The invention therefore proposes a line of shafts 2, 4, gearbox, comprising such a lubrication device. In this arrangement, the cannula 11 makes it possible to effectively lubricate both the bearings 5, 6, of the second shaft 4 in the first 2, and idle pinions 9, 10, carried by the second shaft.
Sans sortir de l’invention, la canule 11 peut être agencée différemment dans la ligne d’arbres, pourvu qu’elle soit fixée à l’intérieur de l’un deux, de manière à tourner solidairement avec celui-ci en canalisant l’huile vers le second. Without departing from the invention, the cannula 11 can be arranged differently in the line of shafts, provided that it is fixed inside one of them, so as to rotate integrally therewith by channeling the shaft. oil to the second.
La longueur et le diamètre de la canule, sont adaptables à chaque environnement de boîte de vitesses, pour répondre à des besoins spécifiques, par exemple la lubrification de pignons et de roulements entre deux arbres, ou entre un arbre et le carter de boîte.The length and diameter of the cannula can be adapted to each gearbox environment, to meet specific needs, for example the lubrication of pinions and bearings between two shafts, or between a shaft and the gearbox housing.
Il est ainsi possible de faire des perçages sur la canule elle-même, pour créer des points de fuite vers des zones de lubrification spécifiques, ou de la fixer directement sur un arbre portant des perçages de lubrification. It is thus possible to make holes in the cannula itself, to create leak points to specific lubrication areas, or attach it directly to a shaft with lubrication bores.

Claims

REVENDICATIONS
1 . Dispositif de lubrification d’une ligne d’arbres (2, 4) de boîte de vitesses comprenant au moins un arbre (4) à l’intérieur duquel est ménagé un perçage axial (7) d’écoulement d’huile et plusieurs perçages (8a, 8b, 8c) partant radialement de celui-ci au droit de zones de lubrification ciblées de la boîte, caractérisé en ce qu’il comporte une canule tournante (11) disposée en amont des zones de lubrification ciblées, dans le flux d’écoulement d’huile à l’intérieur de la ligne d’arbres. 1. Device for lubricating a line of gearbox shafts (2, 4) comprising at least one shaft (4) inside which an axial bore (7) for oil flow and several bores ( 8a, 8b, 8c) starting radially therefrom in line with targeted lubrication zones of the box, characterized in that it comprises a rotating cannula (11) arranged upstream of the targeted lubrication zones, in the flow of oil flow inside the shaft line.
2. Dispositif de lubrification selon la revendication 1 , caractérisé en ce les zones de lubrification ciblée incluent au moins un pignon fou (9, 10) de la ligne d’arbres (2, 4). 2. Lubrication device according to claim 1, characterized in that the targeted lubrication areas include at least one idle gear (9, 10) of the shaft line (2, 4).
3. Dispositif de lubrification selon la revendication 1 , caractérisé en ce les zones de lubrification ciblée incluent des roulements (5, 6) de la ligne d’arbres (2, 4). 3. Lubrication device according to claim 1, characterized in that the targeted lubrication areas include bearings (5, 6) of the shaft line (2, 4).
4. Dispositif de lubrification ciblée selon la revendication 1 , 2 ou 3, caractérisé en ce que la canule (11) est fixée sur un premier arbre (2) de la ligne d’arbres (2, 4), dans le sens d’écoulement de l’huile. 4. Targeted lubrication device according to claim 1, 2 or 3, characterized in that the cannula (11) is fixed on a first shaft (2) of the line of shafts (2, 4), in the direction of oil flow.
5. Dispositif de lubrification selon la revendication 4, caractérisé en ce que la canule (11 ) présente une section de concentration et de guidage (11 a) du flux d’huile vers l’entrée d’un deuxième arbre (4) de la ligne d’arbres (2, 4). 5. Lubrication device according to claim 4, characterized in that the cannula (11) has a section for concentrating and guiding (11 a) the flow of oil towards the inlet of a second shaft (4) of the line of trees (2, 4).
6. Dispositif de lubrification selon la revendication 5, caractérisé en ce que le deuxième arbre (4) présente un perçage axial d’écoulement d’huile (7) et des perçages radiaux (8a, 8b, 8c), au droit de zones de lubrification ciblées de la ligne d’arbres (2, 4). 6. Lubrication device according to claim 5, characterized in that the second shaft (4) has an axial oil flow bore (7) and radial bores (8a, 8b, 8c), in line with areas of targeted lubrication of the shaft line (2, 4).
7. Dispositif de lubrification selon la revendication 5 ou 6, caractérisé en ce que la canule (11 ) forme un entonnoir tournant avec le premier arbre (2), et orientant l’huile vers l’entrée du deuxième arbre (4). 7. Lubrication device according to claim 5 or 6, characterized in that the cannula (11) forms a funnel rotating with the first shaft (2), and directing the oil towards the inlet of the second shaft (4).
8. Dispositif de lubrification selon la revendication 6 ou 7, caractérisé en ce que le deuxième arbre (4) présente au moins un perçage radial (8a) assurant la lubrification de roulements (5, 6) du deuxième arbre (4) à l’intérieur du premier arbre (2). 8. Lubrication device according to claim 6 or 7, characterized in that the second shaft (4) has at least one radial bore (8a) providing the lubrication of bearings (5, 6) of the second shaft (4) to the inside the first shaft (2).
9. Dispositif de lubrification selon la revendication 8, caractérisé en ce que le deuxième arbre (4) présente au moins un perçage radial (8a) débouchant entre deux roulements (5, 6) du deuxième arbre (4) à l’intérieur du premier arbre (2). 9. Lubrication device according to claim 8, characterized in that the second shaft (4) has at least one radial bore (8a) opening between two bearings (5, 6) of the second shaft (4) inside the first tree (2).
10. Ligne d’arbre (2, 4) de boîte de vitesses caractérisé en ce qu’il comporte un dispositif de lubrification conforme à l’une des revendications précédentes. 10. Gearbox shaft line (2, 4) characterized in that it comprises a lubricating device according to one of the preceding claims.
EP20820221.8A 2019-12-17 2020-12-10 Lubrication device and gearbox shaftline Pending EP4077974A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1914607A FR3104661B1 (en) 2019-12-17 2019-12-17 LUBRICATION DEVICE AND LINE OF GEARBOX SHAFT
PCT/EP2020/085600 WO2021122330A1 (en) 2019-12-17 2020-12-10 Lubrication device and gearbox shaftline

Publications (1)

Publication Number Publication Date
EP4077974A1 true EP4077974A1 (en) 2022-10-26

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ID=69743532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20820221.8A Pending EP4077974A1 (en) 2019-12-17 2020-12-10 Lubrication device and gearbox shaftline

Country Status (5)

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EP (1) EP4077974A1 (en)
JP (1) JP2023506529A (en)
KR (1) KR20220111720A (en)
FR (1) FR3104661B1 (en)
WO (1) WO2021122330A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2877065B1 (en) 2004-10-22 2006-12-15 Renault Sas GEARBOX FOR A MOTOR VEHICLE COMPRISING A FORGED LUBRICATING DEVICE FOR GEAR WHEELS
FR2888909B1 (en) * 2005-07-21 2007-08-24 Renault Sas LUBRICATION DEVICE FOR GEAR BOX
FR3048746B1 (en) * 2016-03-10 2019-04-26 Renault S.A.S DEVICE FOR LUBRICATING A HOLLOW SHAFT AND GEARBOX COMPRISING A FIXED POWER CANNULA
FR3056666B1 (en) * 2016-09-26 2020-05-22 Renault S.A.S LUBRICANT GUIDING DEFLECTOR FOR SUPPLYING A HOLLOW GEAR SHAFT

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KR20220111720A (en) 2022-08-09
FR3104661B1 (en) 2022-03-25
JP2023506529A (en) 2023-02-16
WO2021122330A1 (en) 2021-06-24
FR3104661A1 (en) 2021-06-18

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