EP2883774B1 - Motor bogie for a rail vehicle in which the motor is substantially coaxial with the wheel axle - Google Patents

Motor bogie for a rail vehicle in which the motor is substantially coaxial with the wheel axle Download PDF

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Publication number
EP2883774B1
EP2883774B1 EP14197408.9A EP14197408A EP2883774B1 EP 2883774 B1 EP2883774 B1 EP 2883774B1 EP 14197408 A EP14197408 A EP 14197408A EP 2883774 B1 EP2883774 B1 EP 2883774B1
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EP
European Patent Office
Prior art keywords
motor
axle
bogie
hollow shaft
axis
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EP14197408.9A
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German (de)
French (fr)
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EP2883774A1 (en
Inventor
Alain Rodet
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Alstom Transport Technologies SAS
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Alstom Transport Technologies SAS
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Priority to PL14197408T priority Critical patent/PL2883774T3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C9/00—Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
    • B61C9/38—Transmission systems in or for locomotives or motor railcars with electric motor propulsion
    • B61C9/44—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with hollow transmission shaft concentric with wheel axis

Definitions

  • the present invention relates to a motor vehicle bogie, of the type comprising at least one pair of wheels, the wheels of the or each pair being connected to each other by a shaft to form an axle, the bogie further comprising a motor, substantially coaxial with the axle, for driving the axle in rotation about its axis.
  • the invention also relates to a railway vehicle comprising such a bogie.
  • each motorized bogie In a railway vehicle, each motorized bogie, or motor bogie, generally comprises two pairs of wheels, the wheels of a pair being connected to each other by a shaft to form an axle, a chassis connecting said axles. one to the other, suspensions each interposed between a half-chassis and an axle, said suspension allowing relative vertical displacement of the axle relative to the corresponding half-chassis, and means for driving in rotation one axles or each axle.
  • These drive means comprise at least one motor and a mechanical device ensuring the transmission of the engine torque from the engine to the axle, as well as the transmission of the braking torque from the axle to the engine.
  • the drive means are differentiated by the distribution of their masses which are either “unsprung”, that is to say linked to the axle, or “suspended”, that is to say linked to the chassis of bogie above the suspensions.
  • These drive means are differentiated by their ease of integration into the bogie in terms of size, whether in width (that is to say parallel to the axis of the axle) or in length (parallel in the driving direction of the vehicle). They differ in complexity by the number of parts they include.
  • US 2,027,218 A a rail vehicle bogie comprising a motor mounted between the wheels and driving the wheels by means of two reducers.
  • US 2,027,218 A can be considered the closest state of the art.
  • An object of the invention is to provide a motor bogie incorporating axle drive means which are both compact and powerful.
  • Other objectives are to have training means which are simple to implement, and to reduce the unsprung masses.
  • the invention relates to a motor bogie according to claim 1.
  • the invention also relates to a railway vehicle comprising a motor bogie as defined above.
  • a horizontal plane is substantially parallel to the plane in which the axles extend and the vertical plane is substantially parallel to the plane in which the wheels extend.
  • the term “longitudinal” is defined relative to the direction in which a rail vehicle extends in a horizontal plane and the term “transverse” is defined in a direction substantially perpendicular to the longitudinal direction in a horizontal plane.
  • Each of the motor bogies 10 represented on the Figure 1 and 2 , comprises two pairs of wheels 20, the wheels 20 of each pair being connected to each other by a shaft to form an axle 22.
  • the axles 22 are connected to each other by a chassis 24, called exterior, comprising two half-chassis each secured to a respective axle 22.
  • external chassis is meant that the side members 26 of each half-chassis surround the wheels 20 in the transverse direction, that is to say that they extend outside the template formed by the wheels 20.
  • Each half-frame comprises two longitudinal members 26, extending substantially longitudinally, connected to one another by a cross member (not shown), extending substantially transversely.
  • Each beam 26 rests on the axle boxes 28 an axle 22, said axle boxes 28 being disposed substantially against the wheels 20 of axle 22, on either side of said wheels 20.
  • a primary suspension 30 is interposed between each beam 26 and the axle box 28 on which said beam 26 rests. This primary suspension 30 allows relative vertical movement of the axle 22 relative to the half-frame, that is to say that the half-frame is movable and suspended relative to the axle 22 in a substantially vertical direction.
  • the two half-chassis are held together so that the axles 22 remain parallel and the bogie 10 does not fold back on itself under the effect of a vertical load.
  • At least one of the axles 22, or the two axles 22, is (are) driven (s) in rotation by drive means 32 comprising a motor 34, a reduction gear 36, and a mechanical device 38 ensuring the transmission of the engine torque from motor 34 to axle 22, as well as the transmission of braking torque from axle 22 to motor 34.
  • the motor 34 is suspended, that is to say that it is rigidly connected to the chassis 24. It is moreover substantially coaxial with the axle 22, except for the deflections authorized by the suspension 30. Said movements authorized by the suspension 30 are in particular less than 30 mm in absolute value. Preferably, at rest, the motor 34 is coaxial with the axle 22.
  • the motor 34 is interposed between the wheels 20 of the axle 22.
  • the motor 34 is mounted around the axle 22. In other words, it defines a tubular cavity 40 through which the axle 22 passes.
  • the motor 34 comprises a rotor 42 and a stator 44.
  • the stator 44 is rigidly connected to the chassis 24 by a connecting member 46. In a rigid assembly, this connecting member 46 prohibits any movement of the stator 44 relative to the chassis 24.
  • the rotor 42 is coaxial with the stator 44.
  • Bearings 48 ensure the connection of the rotor 42 to the stator 44, while allowing the rotation of the rotor 42 about its axis relative to the stator 44.
  • the rotor 42 defines the tubular cavity 40, and the stator 44 is mounted around the rotor 42.
  • the motor 34 thus forms an internal rotor motor.
  • the reduction gear 36 is substantially coaxial with the axle 22.
  • the reducer 36 is a planetary gear reducer. It comprises in known manner a plurality of meshing elements 50, 52, 54, 56, including an inner sun gear 50 forming an input gear of the reduction gear 36, mounted around the axle 22, an outer sun gear 52, also called crown, coaxial to the inner planetary 50, a plurality of satellites 54 interposed between the inner sun gear 50 and the ring gear 52, each being meshed with the inner sun gear 50 and the ring gear 52, and a planet carrier 56, coaxial with the inner sun gear 50 and the ring gear 52, on which each satellite 54 is rotatably mounted around its axis.
  • the mechanical device 38 comprises a hollow shaft 60, a member 62, also called the drive plate, for coupling a suspended element of the transmission means 32 to the hollow shaft 60, and a member 64, also called the driven plate, d coupling of the hollow shaft 60 to an unsprung element.
  • the hollow shaft 60 is interposed between the axle 22 and the motor 34, in particular between the axle 22 and the rotor 42. It crosses the tubular cavity 40. It defines a cylindrical cavity 66 traversed by the axle 22. It is substantially coaxial with the axle 22, that is to say that the axis of the hollow shaft 60 intersects the axis of the axle 22, the angle between the two axes always being less than 3 ° in absolute value.
  • the coupling members 62, 64 are arranged at the axial ends of the hollow shaft 60. They thus frame the hollow shaft 60 transversely.
  • Each coupling member, respectively 62, 64, is adapted to allow an inclination of the axis of the hollow shaft 60 relative to the axis of the suspended element, respectively relative to the axis of the unsprung element .
  • each coupling member respectively 62, 64, comprises a rigid annular plate 70, substantially coaxial with the axle 22, a first pair of rigid rollers 72 integral with the hollow shaft 60, and a second pair of rigid rollers 74 integral with the suspended element, respectively with the unsprung element.
  • the plate 70 defines for each roller 72, 74 a respective cylindrical cavity 76 for receiving said roller 72, 74.
  • Each roller 72, 74 has a curved cylindrical surface and has a maximum diameter less than that of its respective reception cavity 76.
  • Each coupling member 62, 64 further comprises a respective sleeve 78 for each roller 72, 74, said sleeve 78 enveloping the roller 72, 74 by filling the clearance between the roller 72, 74 and its respective receiving cavity 76, said sleeve 78 being of elastic material, for example rubber.
  • the plate 70 and the rollers 72, 74 are typically made of steel.
  • the reduction gear 36 is not suspended and constitutes the unsprung element coupled to the hollow shaft 60 by means of the coupling member 64, the suspended element coupled to the hollow shaft 60 by means of the coupling member 62 being constituted by the motor 34.
  • the planet carrier 56 is then secured to the axle 22, in particular to one of the wheels 20 of the axle 22, and the crown 52 is linked to the chassis 24 by a reaction rod 80 articulated to the crown 52 and to the chassis 24, so that said connecting rod 80 is adapted to take up the torques by allowing the deflections due to movements between the chassis 24 and the axle 22.
  • the rotor 42 drives, by means of the coupling member 62, the hollow shaft 60 in rotation about its axis. This rotation is transmitted, via the coupling member 64, to the inner sun gear 50 of the reduction gear 36.
  • the inner sun gear 50 in turn drives the satellites 54 which roll on the crown 52. In doing so, the satellites 54 cause the planet carrier 56 to rotate about its axis and, as a result, the axle 22 to rotate.
  • the axis of the motor 34 remains fixed relative to the chassis 24, while the axis of the reduction gear 36 follows the displacement of the axle 22. It follows a relative displacement of the axes of the motor 34 and of the reduction gear 36, which, if they remain parallel to one another, are then no longer aligned.
  • the hollow shaft 60 inclines relative to the direction of the axes of the motor 34 and of the reduction gear 36, this inclination being permitted thanks to the particular shape of the rollers 72, 74 and to the use of the sleeves of elastic material 78 to fill the clearances between the rollers 72, 74 and their respective receiving cavities 76.
  • This embodiment has the advantage of having a torque transmitted at the level of the coupling members 62, 64 which remains relatively low, so that it is possible to use light and space-saving coupling members.
  • This embodiment has the drawback, however, of presenting higher unsprung masses, and of requiring the installation of a bearing resistant to high rotational speeds at the interface between the inner sun gear 50 and the axle 22.
  • the reduction gear 36 is suspended and constitutes the suspended element coupled to the hollow shaft 60 via the coupling member 62, the unsprung element coupled to the hollow shaft 60 via the coupling member 64 being constituted by the axle 22, in particular by a wheel 20 of the axle 22.
  • the rotor 42 of the motor 34 is then secured to the inner sun gear 50, which thus forms an output pinion of the motor 34 meshing directly on the reduction gear 36, and the stator 44 is integral with the crown 52.
  • the rotor 42 directly drives the inner sun gear 50 of the reduction gear 36.
  • the inner sun gear 50 in turn drives the satellites 54 which roll on the crown 52.
  • the satellites 54 cause the planet carrier 56 to rotate around its axis.
  • the rotation of the planet carrier 56 is transmitted to the hollow shaft 60 via the coupling member 62.
  • the rotation of the hollow shaft 60 around its axis finally causes the axle 22 to rotate by means of the coupling member 64.
  • the axes of the motor 34 and of the reduction gear 36 remain fixed relative to the chassis 24. Even if they remain parallel to the axis of the axle 22, the axes of the motor 34 and of the reduction gear 36 are then no longer aligned with the axis of the axle 22.
  • the hollow shaft 60 inclines relatively to the direction of the axes of the reduction gear 36 and of the axle 22, this inclination being permitted thanks to the particular shape of the rollers 72, 74 and to the use of sleeves made of elastic material 78 to fill the clearances between the rollers 72, 74 and their respective receiving cavities 76.
  • This embodiment has the advantage of having few unsprung masses.
  • the fact of linking the motor 34 to the reduction gear 36 makes it possible to gain in compactness of the assembly.
  • the torque transmitted by the coupling members 62, 64 is greater, which requires the use of heavier and bulky coupling members.
  • the drive of the axle is carried out by means of a device combining power and compactness.

Description

La présente invention concerne un bogie moteur de véhicule ferroviaire, du type comprenant au moins une paire de roues, les roues de la ou chaque paire étant reliées l'une à l'autre par un arbre pour former un essieu, le bogie comprenant en outre un moteur, sensiblement coaxial à l'essieu, pour entraîner l'essieu en rotation autour de son axe.The present invention relates to a motor vehicle bogie, of the type comprising at least one pair of wheels, the wheels of the or each pair being connected to each other by a shaft to form an axle, the bogie further comprising a motor, substantially coaxial with the axle, for driving the axle in rotation about its axis.

L'invention concerne également un véhicule ferroviaire comprenant un tel bogie.The invention also relates to a railway vehicle comprising such a bogie.

Dans un véhicule ferroviaire, chaque bogie motorisé, ou bogie moteur, comprend généralement deux paires de roues, les roues d'une paire étant reliées l'une à l'autre par un arbre pour former un essieu, un châssis reliant lesdits essieux l'un à l'autre, des suspensions interposées chacune entre un demi-châssis et un essieu, ladite suspension permettant un déplacement vertical relatif de l'essieu par rapport au demi-châssis correspondant, et des moyens d'entraînement en rotation de l'un des essieux ou de chaque essieu. Ces moyens d'entraînement comprennent au moins un moteur et un dispositif mécanique assurant la transmission du couple moteur du moteur à l'essieu, ainsi que la transmission du couple de freinage de l'essieu au moteur. Les moyens d'entraînement se différencient par la répartition de leurs masses qui sont soit « non suspendues », c'est-à-dire liées à l'essieu, soit « suspendues », c'est-à-dire liées au châssis de bogie au dessus des suspensions. Ces moyens d'entraînement se différencient par leur facilité d'intégration dans le bogie en terme d'encombrement, que ce soit en largeur (c'est-à-dire parallèlement à l'axe de l'essieu) ou en longueur (parallèlement au sens de marche du véhicule). Ils se différencient en complexité par le nombre de pièces qu'ils comprennent.In a railway vehicle, each motorized bogie, or motor bogie, generally comprises two pairs of wheels, the wheels of a pair being connected to each other by a shaft to form an axle, a chassis connecting said axles. one to the other, suspensions each interposed between a half-chassis and an axle, said suspension allowing relative vertical displacement of the axle relative to the corresponding half-chassis, and means for driving in rotation one axles or each axle. These drive means comprise at least one motor and a mechanical device ensuring the transmission of the engine torque from the engine to the axle, as well as the transmission of the braking torque from the axle to the engine. The drive means are differentiated by the distribution of their masses which are either "unsprung", that is to say linked to the axle, or "suspended", that is to say linked to the chassis of bogie above the suspensions. These drive means are differentiated by their ease of integration into the bogie in terms of size, whether in width (that is to say parallel to the axis of the axle) or in length (parallel in the driving direction of the vehicle). They differ in complexity by the number of parts they include.

Pour réduire les efforts verticaux dans la voie, il est avantageux de diminuer les masses non suspendues. Pour faciliter l'intégration des moyens d'entraînement, il est avantageux de diminuer les encombrements.To reduce the vertical forces in the track, it is advantageous to reduce the unsprung masses. To facilitate the integration of the drive means, it is advantageous to reduce the dimensions.

On connaît de EP 1 320 478 un bogie de véhicule ferroviaire dans lequel le rotor du moteur est solidaire de l'essieu et le stator est monté sur l'essieu par l'intermédiaire de paliers, de sorte que le moteur est non suspendu. Une bielle de réaction articulée au stator et au châssis de bogie permet de reprendre les couples et d'assurer les débattements dus aux mouvements entre le châssis de bogie et l'essieu. Les moyens d'entraînement sont ainsi particulièrement compacts. Ils présentent cependant l'inconvénient d'avoir des masses non suspendues élevées, ce qui limite la vitesse du véhicule. En outre, à voie et diamètre de roue constants, il est très difficile d'augmenter le couple moteur exercé sur l'essieu.We know of EP 1,320,478 a railway vehicle bogie in which the rotor of the engine is secured to the axle and the stator is mounted on the axle by means of bearings, so that the engine is not suspended. A reaction rod articulated to the stator and to the bogie chassis makes it possible to take up the torques and ensure the travel due to movements between the bogie chassis and the axle. The drive means are thus particularly compact. However, they have the disadvantage of having high unsprung masses, which limits the speed of the vehicle. In addition, with constant track and wheel diameter, it is very difficult to increase the driving torque exerted on the axle.

On connaît de WO 2006/051046 un bogie de véhicule ferroviaire dans lequel le rotor forme un arbre creux sensiblement coaxial à l'essieu, le moteur étant suspendu. Pour compenser les débattements dus aux mouvements entre le châssis de bogie et l'essieu, des organes d'accouplement tolérant un léger désaxement du rotor relativement à l'axe de l'essieu, disposés aux extrémités axiales du rotor, assurent la transmission de couple entre le rotor et l'essieu. Les masses non suspendues sont ainsi réduites. Toutefois, cette transmission augmente l'encombrement du bogie dans le sens de marche du véhicule. En outre, le moteur dispose de moins d'espace entre les roues, de sorte que la longueur de fer, et donc le couple exercé sur l'essieu, sont plus faibles que dans la solution décrite dans EP 1 320 478 .We know of WO 2006/051046 a rail vehicle bogie in which the rotor forms a hollow shaft substantially coaxial with the axle, the motor being suspended. To compensate for the movements due to the movements between the bogie chassis and the axle, coupling members tolerating a slight offset of the rotor relative to the axis of the axle, arranged at the axial ends of the rotor, ensure the transmission of torque. between the rotor and the axle. The unsprung masses are thus reduced. However, this transmission increases the size of the bogie in the direction of travel of the vehicle. In addition, the motor has less space between the wheels, so that the length of iron, and therefore the torque exerted on the axle, are lower than in the solution described in EP 1,320,478 .

On connaît également de US 2,027,218 A un bogie de véhicule ferroviaire comprenant un moteur monté entre les roues et entraînant les roues par l'intermédiaire de deux réducteurs. US 2,027,218 A peut être considéré comme l'état de la technique le plus proche.We also know of US 2,027,218 A a rail vehicle bogie comprising a motor mounted between the wheels and driving the wheels by means of two reducers. US 2,027,218 A can be considered the closest state of the art.

Un objectif de l'invention est de proposer un bogie moteur intégrant des moyens d'entraînement de l'essieu qui soient à la fois compacts et puissants. D'autres objectifs sont d'avoir des moyens d'entraînement simples à mettre en œuvre, et de réduire les masses non suspendues.An object of the invention is to provide a motor bogie incorporating axle drive means which are both compact and powerful. Other objectives are to have training means which are simple to implement, and to reduce the unsprung masses.

A cet effet, l'invention a pour objet un bogie moteur selon la revendication 1 .To this end, the invention relates to a motor bogie according to claim 1.

Selon des modes de réalisation particuliers de l'invention, le bogie moteur présente également l'une ou plusieurs des caractéristiques ci-dessous, prise(s) isolément ou suivant toute(s) combinaison(s) techniquement possible(s) :

  • le moteur est interposé entre les deux roues de la paire ;
  • le réducteur est un réducteur à train épicycloïdal ;
  • le bogie comprend un châssis et une suspension entre le châssis et l'essieu, ladite suspension étant agencée pour permettre un déplacement vertical relatif de l'essieu par rapport au châssis, le moteur étant fixé rigidement au châssis ;
  • le réducteur comprend un élément d'engrenage solidaire de l'essieu ;
  • le moteur comprend un pignon de sortie engrenant directement sur le réducteur ;
  • le moteur comprend un rotor monté autour de l'essieu ;
  • le bogie moteur comprend un premier organe d'accouplement pour l'accouplement du rotor à l'arbre creux, ledit premier organe d'accouplement étant adapté pour permettre une inclinaison de l'axe du rotor relativement à l'axe de l'arbre creux ;
  • le bogie moteur comprend un premier organe d'accouplement pour l'accouplement de l'arbre creux à l'essieu, ledit premier organe d'accouplement étant adapté pour permettre une inclinaison de l'axe de l'arbre creux relativement à l'axe de l'essieu ;
  • le bogie moteur comprend un deuxième organe d'accouplement pour l'accouplement de l'arbre creux à un pignon d'entrée du réducteur, ledit deuxième organe d'accouplement étant adapté pour permettre une inclinaison de l'axe du pignon d'entrée relativement à l'axe de l'arbre creux ;
  • le moteur est un moteur à rotor interne.
According to particular embodiments of the invention, the motor bogie also has one or more of the characteristics below, taken in isolation or according to any technically possible combination (s):
  • the motor is interposed between the two wheels of the pair;
  • the reducer is a planetary gear reducer;
  • the bogie comprises a chassis and a suspension between the chassis and the axle, said suspension being arranged to allow relative vertical movement of the axle relative to the chassis, the motor being rigidly fixed to the chassis;
  • the reduction unit comprises a gear element integral with the axle;
  • the motor comprises an output pinion meshing directly on the reduction gear;
  • the motor comprises a rotor mounted around the axle;
  • the motor bogie comprises a first coupling member for coupling the rotor to the hollow shaft, said first coupling member being adapted to allow an inclination of the axis of the rotor relative to the axis of the hollow shaft ;
  • the motor bogie comprises a first coupling member for coupling the hollow shaft to the axle, said first coupling member being adapted to allow the axis of the hollow shaft to be tilted relative to the axis axle;
  • the motor bogie comprises a second coupling member for coupling the hollow shaft to an input gear of the reduction gear, said second coupling member being adapted to allow an inclination of the axis of the input gear relatively to the axis of the hollow shaft;
  • the motor is an internal rotor motor.

L'invention a également pour objet un véhicule ferroviaire comprenant un bogie moteur tel que défini ci-dessus.The invention also relates to a railway vehicle comprising a motor bogie as defined above.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux dessins annexés, dans lesquels :

  • la Figure 1 est une vue en coupe transversale d'un bogie moteur selon un premier mode de réalisation de l'invention, et
  • la Figure 2 est une vue en coupe transversale d'un bogie moteur selon un deuxième mode de réalisation de l'invention
Other characteristics and advantages of the invention will appear on reading the description which follows, given solely by way of example and made with reference to the appended drawings, in which:
  • the Figure 1 is a cross-sectional view of a motor bogie according to a first embodiment of the invention, and
  • the Figure 2 is a cross-sectional view of a motor bogie according to a second embodiment of the invention

Dans la suite, les termes « vertical » et « horizontal » sont définis par rapport à un bogie monté dans un véhicule ferroviaire. Ainsi, un plan horizontal est sensiblement parallèle au plan dans lequel s'étendent les essieux et le plan vertical est sensiblement parallèle au plan dans lequel s'étendent les roues. Le terme « longitudinal » est défini par rapport à la direction dans laquelle s'étend un véhicule ferroviaire dans un plan horizontal et le terme « transversal » est défini selon une direction sensiblement perpendiculaire à la direction longitudinale dans un plan horizontal.In the following, the terms "vertical" and "horizontal" are defined with respect to a bogie mounted in a railway vehicle. Thus, a horizontal plane is substantially parallel to the plane in which the axles extend and the vertical plane is substantially parallel to the plane in which the wheels extend. The term "longitudinal" is defined relative to the direction in which a rail vehicle extends in a horizontal plane and the term "transverse" is defined in a direction substantially perpendicular to the longitudinal direction in a horizontal plane.

Chacun des bogies moteur 10 représentés sur les Figure 1 et 2, comprend deux paires de roues 20, les roues 20 de chaque paire étant reliées l'une à l'autre par un arbre pour former un essieu 22. Les essieux 22 sont reliés l'un à l'autre par un châssis 24, dit extérieur, comprenant deux demi-châssis solidaires chacun d'un essieu 22 respectif. Par châssis extérieur, on entend que des longerons 26 de chaque demi-châssis encadrent les roues 20 selon la direction transversale, c'est-à-dire qu'ils s'étendent à l'extérieur du gabarit formé par les roues 20.Each of the motor bogies 10 represented on the Figure 1 and 2 , comprises two pairs of wheels 20, the wheels 20 of each pair being connected to each other by a shaft to form an axle 22. The axles 22 are connected to each other by a chassis 24, called exterior, comprising two half-chassis each secured to a respective axle 22. By external chassis is meant that the side members 26 of each half-chassis surround the wheels 20 in the transverse direction, that is to say that they extend outside the template formed by the wheels 20.

Chaque demi-châssis comprend deux longerons 26, s'étendant sensiblement longitudinalement, reliés l'un à l'autre par une traverse (non représentée), s'étendant sensiblement transversalement. Chaque longeron 26 repose sur les boîtes d'essieu 28 d'un essieu 22, lesdites boîtes d'essieu 28 étant disposées sensiblement contre les roues 20 de l'essieu 22, de part et d'autre desdites roues 20.Each half-frame comprises two longitudinal members 26, extending substantially longitudinally, connected to one another by a cross member (not shown), extending substantially transversely. Each beam 26 rests on the axle boxes 28 an axle 22, said axle boxes 28 being disposed substantially against the wheels 20 of axle 22, on either side of said wheels 20.

Une suspension primaire 30 est interposée entre chaque longeron 26 et la boîte d'essieu 28 sur laquelle ledit longeron 26 repose. Cette suspension primaire 30 permet un déplacement vertical relatif de l'essieu 22 par rapport au demi-châssis, c'est-à-dire que le demi-châssis est mobile et suspendu par rapport à l'essieu 22 selon une direction sensiblement verticale.A primary suspension 30 is interposed between each beam 26 and the axle box 28 on which said beam 26 rests. This primary suspension 30 allows relative vertical movement of the axle 22 relative to the half-frame, that is to say that the half-frame is movable and suspended relative to the axle 22 in a substantially vertical direction.

Les deux demi-châssis sont maintenus l'un à l'autre de sorte que les essieux 22 restent parallèles et que le bogie 10 ne se replie pas sur lui même sous l'effet d'une charge verticale.The two half-chassis are held together so that the axles 22 remain parallel and the bogie 10 does not fold back on itself under the effect of a vertical load.

Au moins un des essieux 22, ou les deux essieux 22, est (sont) entraîné(s) en rotation par des moyens d'entraînement 32 comprenant un moteur 34, un réducteur 36, et un dispositif mécanique 38 assurant la transmission du couple moteur du moteur 34 à l'essieu 22, ainsi que la transmission du couple de freinage de l'essieu 22 au moteur 34.At least one of the axles 22, or the two axles 22, is (are) driven (s) in rotation by drive means 32 comprising a motor 34, a reduction gear 36, and a mechanical device 38 ensuring the transmission of the engine torque from motor 34 to axle 22, as well as the transmission of braking torque from axle 22 to motor 34.

Le moteur 34 est suspendu, c'est-à-dire qu'il est lié rigidement au châssis 24. Il est par ailleurs sensiblement coaxial à l'essieu 22, aux débattements autorisés par la suspension 30 près. Lesdits débattements autorisés par la suspension 30 sont en particulier inférieurs à 30 mm en valeur absolue. De préférence, au repos, le moteur 34 est coaxial à l'essieu 22.The motor 34 is suspended, that is to say that it is rigidly connected to the chassis 24. It is moreover substantially coaxial with the axle 22, except for the deflections authorized by the suspension 30. Said movements authorized by the suspension 30 are in particular less than 30 mm in absolute value. Preferably, at rest, the motor 34 is coaxial with the axle 22.

Le moteur 34 est interposé entre les roues 20 de l'essieu 22.The motor 34 is interposed between the wheels 20 of the axle 22.

Le moteur 34 est monté autour de l'essieu 22. En d'autres termes, il définit une cavité tubulaire 40 traversée par l'essieu 22.The motor 34 is mounted around the axle 22. In other words, it defines a tubular cavity 40 through which the axle 22 passes.

Le moteur 34 comprend un rotor 42 et un stator 44.The motor 34 comprises a rotor 42 and a stator 44.

Le stator 44 est lié rigidement au châssis 24 par un organe de liaison 46. Dans un montage rigide, cet organe de liaison 46 interdit tout déplacement du stator 44 relativement au châssis 24.The stator 44 is rigidly connected to the chassis 24 by a connecting member 46. In a rigid assembly, this connecting member 46 prohibits any movement of the stator 44 relative to the chassis 24.

Le rotor 42 est coaxial au stator 44. Des paliers 48 assurent la liaison du rotor 42 au stator 44, tout en permettant la rotation du rotor 42 autour de son axe relativement au stator 44.The rotor 42 is coaxial with the stator 44. Bearings 48 ensure the connection of the rotor 42 to the stator 44, while allowing the rotation of the rotor 42 about its axis relative to the stator 44.

Le rotor 42 définit la cavité tubulaire 40, et le stator 44 est monté autour du rotor 42. Le moteur 34 forme ainsi un moteur à rotor interne.The rotor 42 defines the tubular cavity 40, and the stator 44 is mounted around the rotor 42. The motor 34 thus forms an internal rotor motor.

Le réducteur 36 est sensiblement coaxial à l'essieu 22.The reduction gear 36 is substantially coaxial with the axle 22.

Le réducteur 36 est un réducteur à train épicycloïdal. Il comprend de façon connue une pluralité d'éléments d'engrènement 50, 52, 54, 56, dont un planétaire intérieur 50 formant un pignon d'entrée du réducteur 36, monté autour de l'essieu 22, un planétaire extérieur 52, également appelé couronne, coaxial au planétaire intérieur 50, une pluralité de satellites 54 interposés entre le planétaire intérieur 50 et la couronne 52, chacun étant engrené sur le planétaire intérieur 50 et la couronne 52, et un porte-satellites 56, coaxial au planétaire intérieur 50 et à la couronne 52, sur lequel chaque satellite 54 est monté rotatif autour de son axe.The reducer 36 is a planetary gear reducer. It comprises in known manner a plurality of meshing elements 50, 52, 54, 56, including an inner sun gear 50 forming an input gear of the reduction gear 36, mounted around the axle 22, an outer sun gear 52, also called crown, coaxial to the inner planetary 50, a plurality of satellites 54 interposed between the inner sun gear 50 and the ring gear 52, each being meshed with the inner sun gear 50 and the ring gear 52, and a planet carrier 56, coaxial with the inner sun gear 50 and the ring gear 52, on which each satellite 54 is rotatably mounted around its axis.

Le dispositif mécanique 38 comprend un arbre creux 60, un organe 62, également appelé plateau menant, d'accouplement d'un élément suspendu des moyens de transmission 32 à l'arbre creux 60, et un organe 64, également appelé plateau mené, d'accouplement de l'arbre creux 60 à un élément non suspendu.The mechanical device 38 comprises a hollow shaft 60, a member 62, also called the drive plate, for coupling a suspended element of the transmission means 32 to the hollow shaft 60, and a member 64, also called the driven plate, d coupling of the hollow shaft 60 to an unsprung element.

L'arbre creux 60 est interposé entre l'essieu 22 et le moteur 34, en particulier entre l'essieu 22 et le rotor 42. Il traverse la cavité tubulaire 40. Il définit une cavité cylindrique 66 traversée par l'essieu 22. Il est sensiblement coaxial à l'essieu 22, c'est-à-dire que l'axe de l'arbre creux 60 intersecte l'axe de l'essieu 22, l'angle entre les deux axes étant toujours inférieur à 3° en valeur absolue.The hollow shaft 60 is interposed between the axle 22 and the motor 34, in particular between the axle 22 and the rotor 42. It crosses the tubular cavity 40. It defines a cylindrical cavity 66 traversed by the axle 22. It is substantially coaxial with the axle 22, that is to say that the axis of the hollow shaft 60 intersects the axis of the axle 22, the angle between the two axes always being less than 3 ° in absolute value.

Les organes d'accouplement 62, 64 sont disposés aux extrémités axiales de l'arbre creux 60. Ils encadrent ainsi l'arbre creux 60 transversalement.The coupling members 62, 64 are arranged at the axial ends of the hollow shaft 60. They thus frame the hollow shaft 60 transversely.

Chaque organe d'accouplement, respectivement 62, 64, est adapté pour permettre une inclinaison de l'axe de l'arbre creux 60 relativement à l'axe de l'élément suspendu, respectivement relativement à l'axe de l'élément non suspendu.Each coupling member, respectively 62, 64, is adapted to allow an inclination of the axis of the hollow shaft 60 relative to the axis of the suspended element, respectively relative to the axis of the unsprung element .

A cet effet, chaque organe d'accouplement, respectivement 62, 64, comprend un plateau annulaire 70 rigide, sensiblement coaxial à l'essieu 22, une première paire de galets 72 rigides solidaires de l'arbre creux 60, et une deuxième paire de galets 74 rigides solidaires de l'élément suspendu, respectivement de l'élément non suspendu. Le plateau 70 définit pour chaque galet 72, 74 une cavité cylindrique 76 respective de réception dudit galet 72, 74. Chaque galet 72, 74 présente une surface cylindrique bombée et a un diamètre maximal inférieur à celui de sa cavité de réception 76 respective. Chaque organe d'accouplement 62, 64 comprend en outre un manchon 78 respectif pour chaque galet 72, 74, ledit manchon 78 enveloppant le galet 72, 74 en comblant le jeu entre le galet 72, 74 et sa cavité de réception respective 76, ledit manchon 78 étant en matériau élastique, par exemple en caoutchouc. Le plateau 70 et les galets 72, 74 sont typiquement en acier.To this end, each coupling member, respectively 62, 64, comprises a rigid annular plate 70, substantially coaxial with the axle 22, a first pair of rigid rollers 72 integral with the hollow shaft 60, and a second pair of rigid rollers 74 integral with the suspended element, respectively with the unsprung element. The plate 70 defines for each roller 72, 74 a respective cylindrical cavity 76 for receiving said roller 72, 74. Each roller 72, 74 has a curved cylindrical surface and has a maximum diameter less than that of its respective reception cavity 76. Each coupling member 62, 64 further comprises a respective sleeve 78 for each roller 72, 74, said sleeve 78 enveloping the roller 72, 74 by filling the clearance between the roller 72, 74 and its respective receiving cavity 76, said sleeve 78 being of elastic material, for example rubber. The plate 70 and the rollers 72, 74 are typically made of steel.

Dans le premier mode de réalisation de la Figure 1, le réducteur 36 est non suspendu et constitue l'élément non suspendu accouplé à l'arbre creux 60 par l'intermédiaire de l'organe d'accouplement 64, l'élément suspendu accouplé à l'arbre creux 60 par l'intermédiaire de l'organe d'accouplement 62 étant constitué par le moteur 34. Le porte-satellites 56 est alors solidaire de l'essieu 22, en particulier de l'une des roues 20 de l'essieu 22, et la couronne 52 est liée au châssis 24 par une bielle de réaction 80 articulée à la couronne 52 et au châssis 24, de sorte que ladite bielle 80 est adaptée pour reprendre les couples en autorisant les débattements dus aux mouvements entre le châssis 24 et l'essieu 22.In the first embodiment of the Figure 1 , the reduction gear 36 is not suspended and constitutes the unsprung element coupled to the hollow shaft 60 by means of the coupling member 64, the suspended element coupled to the hollow shaft 60 by means of the coupling member 62 being constituted by the motor 34. The planet carrier 56 is then secured to the axle 22, in particular to one of the wheels 20 of the axle 22, and the crown 52 is linked to the chassis 24 by a reaction rod 80 articulated to the crown 52 and to the chassis 24, so that said connecting rod 80 is adapted to take up the torques by allowing the deflections due to movements between the chassis 24 and the axle 22.

En fonctionnement, le rotor 42 entraîne, par l'intermédiaire de l'organe d'accouplement 62, l'arbre creux 60 en rotation autour de son axe. Cette rotation est transmise, par l'intermédiaire de l'organe d'accouplement 64, au planétaire intérieur 50 du réducteur 36. Le planétaire intérieur 50 entraîne à son tour les satellites 54 qui roulent sur la couronne 52. Ce faisant, les satellites 54 entraînent la rotation du porte-satellites 56 autour de son axe et, de ce fait, la rotation de l'essieu 22.In operation, the rotor 42 drives, by means of the coupling member 62, the hollow shaft 60 in rotation about its axis. This rotation is transmitted, via the coupling member 64, to the inner sun gear 50 of the reduction gear 36. The inner sun gear 50 in turn drives the satellites 54 which roll on the crown 52. In doing so, the satellites 54 cause the planet carrier 56 to rotate about its axis and, as a result, the axle 22 to rotate.

En cas de déplacement vertical de l'essieu 22 relativement au châssis 24, l'axe du moteur 34 reste fixe par rapport au châssis 24, alors que l'axe du réducteur 36 suit le déplacement de l'essieu 22. Il s'ensuit un déplacement relatif des axes du moteur 34 et du réducteur 36, qui, s'ils restent parallèles l'un à l'autre, ne sont alors plus alignés. De ce fait, l'arbre creux 60 s'incline relativement à la direction des axes du moteur 34 et du réducteur 36, cette inclinaison étant permise grâce à la forme particulière des galets 72, 74 et à l'emploi des manchons en matériau élastique 78 pour combler les jeux entre les galets 72, 74 et leur cavités de réception respectives 76.In the event of vertical displacement of the axle 22 relative to the chassis 24, the axis of the motor 34 remains fixed relative to the chassis 24, while the axis of the reduction gear 36 follows the displacement of the axle 22. It follows a relative displacement of the axes of the motor 34 and of the reduction gear 36, which, if they remain parallel to one another, are then no longer aligned. As a result, the hollow shaft 60 inclines relative to the direction of the axes of the motor 34 and of the reduction gear 36, this inclination being permitted thanks to the particular shape of the rollers 72, 74 and to the use of the sleeves of elastic material 78 to fill the clearances between the rollers 72, 74 and their respective receiving cavities 76.

Ce mode de réalisation présente l'avantage d'avoir un couple transmis au niveau des organes d'accouplement 62, 64 qui demeure relativement faible, de sorte qu'il est possible d'utiliser des organes d'accouplement légers et peu encombrants. Ce mode de réalisation a cependant l'inconvénient de présenter des masses non suspendues plus élevées, et de nécessiter l'installation d'un palier résistant à de grandes vitesses de rotation à l'interface entre le planétaire intérieur 50 et l'essieu 22.This embodiment has the advantage of having a torque transmitted at the level of the coupling members 62, 64 which remains relatively low, so that it is possible to use light and space-saving coupling members. This embodiment has the drawback, however, of presenting higher unsprung masses, and of requiring the installation of a bearing resistant to high rotational speeds at the interface between the inner sun gear 50 and the axle 22.

Dans le deuxième mode de réalisation de la Figure 2, le réducteur 36 est suspendu et constitue l'élément suspendu accouplé à l'arbre creux 60 par l'intermédiaire de l'organe d'accouplement 62, l'élément non suspendu accouplé à l'arbre creux 60 par l'intermédiaire de l'organe d'accouplement 64 étant constitué par l'essieu 22, en particulier par une roue 20 de l'essieu 22. Le rotor 42 du moteur 34 est alors solidaire du planétaire intérieur 50, qui forme ainsi un pignon de sortie du moteur 34 engrenant directement sur le réducteur 36, et le stator 44 est solidaire de la couronne 52.In the second embodiment of the Figure 2 , the reduction gear 36 is suspended and constitutes the suspended element coupled to the hollow shaft 60 via the coupling member 62, the unsprung element coupled to the hollow shaft 60 via the coupling member 64 being constituted by the axle 22, in particular by a wheel 20 of the axle 22. The rotor 42 of the motor 34 is then secured to the inner sun gear 50, which thus forms an output pinion of the motor 34 meshing directly on the reduction gear 36, and the stator 44 is integral with the crown 52.

En fonctionnement, le rotor 42 entraîne directement le planétaire intérieur 50 du réducteur 36. Le planétaire intérieur 50 entraîne à son tour les satellites 54 qui roulent sur la couronne 52. Ce faisant, les satellites 54 entraînent la rotation du porte-satellites 56 autour de son axe. La rotation du porte-satellites 56 est transmise à l'arbre creux 60 par l'intermédiaire de l'organe d'accouplement 62. La rotation de l'arbre creux 60 autour de son axe entraîne finalement la rotation de l'essieu 22 par l'intermédiaire de l'organe d'accouplement 64.In operation, the rotor 42 directly drives the inner sun gear 50 of the reduction gear 36. The inner sun gear 50 in turn drives the satellites 54 which roll on the crown 52. In doing so, the satellites 54 cause the planet carrier 56 to rotate around its axis. The rotation of the planet carrier 56 is transmitted to the hollow shaft 60 via the coupling member 62. The rotation of the hollow shaft 60 around its axis finally causes the axle 22 to rotate by means of the coupling member 64.

En cas de déplacement vertical de l'essieu 22 relativement au châssis 24, les axes du moteur 34 et du réducteur 36 restent fixes par rapport au châssis 24. Même s'ils restent parallèles à l'axe de l'essieu 22, les axes du moteur 34 et du réducteur 36 ne sont alors plus alignés avec l'axe de l'essieu 22. De ce fait, l'arbre creux 60 s'incline relativement à la direction des axes du réducteur 36 et de l'essieu 22, cette inclinaison étant permise grâce à la forme particulière des galets 72, 74 et à l'emploi des manchons en matériau élastique 78 pour combler les jeux entre les galets 72, 74 et leur cavités de réception respectives 76.In the event of vertical displacement of the axle 22 relative to the chassis 24, the axes of the motor 34 and of the reduction gear 36 remain fixed relative to the chassis 24. Even if they remain parallel to the axis of the axle 22, the axes of the motor 34 and of the reduction gear 36 are then no longer aligned with the axis of the axle 22. As a result, the hollow shaft 60 inclines relatively to the direction of the axes of the reduction gear 36 and of the axle 22, this inclination being permitted thanks to the particular shape of the rollers 72, 74 and to the use of sleeves made of elastic material 78 to fill the clearances between the rollers 72, 74 and their respective receiving cavities 76.

Ce mode de réalisation a l'avantage de présenter peu de masses non suspendues. En outre, le fait de lier le moteur 34 au réducteur 36 permet de gagner en compacité de l'ensemble. Toutefois, il en résulte que le couple transmis par les organes d'accouplement 62, 64 est plus important, ce qui nécessite d'utiliser des organes d'accouplement plus lourds et encombrants.This embodiment has the advantage of having few unsprung masses. In addition, the fact of linking the motor 34 to the reduction gear 36 makes it possible to gain in compactness of the assembly. However, it follows that the torque transmitted by the coupling members 62, 64 is greater, which requires the use of heavier and bulky coupling members.

Grâce à l'invention décrite ci-dessus, l'entraînement de l'essieu est effectué au moyen d'un dispositif alliant puissance et compacité.Thanks to the invention described above, the drive of the axle is carried out by means of a device combining power and compactness.

Claims (10)

  1. Motor bogie (10) of a railway vehicle comprising at least one pair of wheels (20), the wheels (20) of the or each pair being connected to each other by a shaft in order to form an axle (22), the bogie (10) comprising in addition a motor (34), substantially coaxial to the axle (22), in order to drive the axle (22) in rotation about its axis, the motor (34) comprising a rotor (42) mounted around the axle (22), the motor (34) driving the axle (22) in rotation by means of a reduction gear (36), characterised in that the bogie (10) comprises a hollow shaft (60) for transmission of the drive of the motor (34) to the axle (22), the hollow shaft (60) being interposed between the axle (22) and the rotor (42).
  2. Motor bogie (10) according to claim 1, in which the motor (34) is interposed between the two wheels (20) of the pair.
  3. Motor bogie (10) according to claim 1 or 2, in which the reduction gear (36) is an epicycloidal reduction gear train.
  4. Motor bogie (10) according to any of the preceding claims, comprising a chassis (24) and a suspension (30) between the chassis (24) and the axle (22), said suspension (24) being arranged to allow relative vertical displacement of the axle (22) relative to the chassis (24), the motor (34) being fixed rigidly to the chassis (24).
  5. Motor bogie (10) according to any of the preceding claims, in which the reduction gear (36) comprises a gearing element (56) integral with the axle (22).
  6. Motor bogie (10) according to any of the claims 1 to 4, in which the motor (34) comprises an output pinion meshing directly on the reduction gear (36).
  7. Motor bogie (10) according to claim 5, comprising a first coupling element (62) for coupling of the rotor (42) to the hollow shaft (60), said first coupling element (62) being adapted to allow inclination of the axis of the rotor (42) relative to the axis of the hollow shaft (60).
  8. Motor bogie (10) according to claim 6, comprising a first coupling element (64) for coupling of the hollow shaft (60) to the axle (22), said first coupling element (64) being adapted to allow inclination of the axis of the hollow shaft (60) relative to the axis of the axle (22).
  9. Motor bogie (10) according to claim 7 or 8, comprising a second coupling element (62, 64) for coupling of the hollow shaft (60) to an input pinion (50) of the reduction gear (36), said second coupling element (62, 64) being adapted to allow inclination of the axis of the input pinion (50) relative to the axis of the hollow shaft (60).
  10. Motor bogie (10) according to any of the preceding claims, in which the motor (34) is an internal rotor motor.
EP14197408.9A 2013-12-11 2014-12-11 Motor bogie for a rail vehicle in which the motor is substantially coaxial with the wheel axle Active EP2883774B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14197408T PL2883774T3 (en) 2013-12-11 2014-12-11 Motor bogie for a rail vehicle in which the motor is substantially coaxial with the wheel axle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1362429A FR3014399B1 (en) 2013-12-11 2013-12-11 BOGIE RAIL VEHICLE ENGINE IN WHICH THE ENGINE IS SUBSTANTIALLY COAXIAL AT THE AXLE

Publications (2)

Publication Number Publication Date
EP2883774A1 EP2883774A1 (en) 2015-06-17
EP2883774B1 true EP2883774B1 (en) 2020-03-04

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EP14197408.9A Active EP2883774B1 (en) 2013-12-11 2014-12-11 Motor bogie for a rail vehicle in which the motor is substantially coaxial with the wheel axle

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EP (1) EP2883774B1 (en)
CN (1) CN104709293B (en)
ES (1) ES2793652T3 (en)
FR (1) FR3014399B1 (en)
PL (1) PL2883774T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3057042B1 (en) * 2016-09-30 2018-11-30 Alstom Transport Technologies EPICYCLOIDAL REDUCER, BOGIE COMPRISING SUCH REDUCER AND ASSOCIATED RAILWAY VEHICLE
CN108116427A (en) * 2016-11-29 2018-06-05 中车大同电力机车有限公司 A kind of hollow shaft traction electric machine device with flexible output terminal
DE102018009993A1 (en) * 2018-12-19 2020-06-25 Süddeutsche Gelenkscheibenfabrik GmbH & Co. KG Drive arrangement for a rail vehicle
FR3116255B1 (en) * 2020-11-13 2022-11-18 Alstom Transp Tech Railway vehicle bogie, railway vehicle and associated machining method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1055598A (en) * 1909-07-12 1913-03-11 Dmitry Balachowsky Driving-axle.
US2027218A (en) * 1933-08-18 1936-01-07 Euclid Road Machinery Company Axle unit
JPH08244605A (en) * 1995-03-14 1996-09-24 Toyo Electric Mfg Co Ltd Electric rolling stock driving gear
DE10047911A1 (en) * 2000-09-27 2002-04-18 Siemens Ag Drive a wheelset
DE10355267A1 (en) * 2003-11-26 2005-06-30 Siemens Ag Electric machine
WO2006051046A1 (en) 2004-11-11 2006-05-18 Siemens Aktiengesellschaft Semi-suspended direct drive for a rail vehicle

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Title
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Also Published As

Publication number Publication date
ES2793652T3 (en) 2020-11-16
CN104709293B (en) 2019-01-22
FR3014399B1 (en) 2017-05-26
EP2883774A1 (en) 2015-06-17
FR3014399A1 (en) 2015-06-12
PL2883774T3 (en) 2020-10-19
CN104709293A (en) 2015-06-17

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