EP4112413A1 - Bogie and associated railway vehicle - Google Patents

Bogie and associated railway vehicle Download PDF

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Publication number
EP4112413A1
EP4112413A1 EP22181266.2A EP22181266A EP4112413A1 EP 4112413 A1 EP4112413 A1 EP 4112413A1 EP 22181266 A EP22181266 A EP 22181266A EP 4112413 A1 EP4112413 A1 EP 4112413A1
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EP
European Patent Office
Prior art keywords
bogie
railway
wheel
gear
wheel hub
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.)
Granted
Application number
EP22181266.2A
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German (de)
French (fr)
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EP4112413B1 (en
Inventor
Ludovic FAURE
Alain Rodet
Cyrille Benais
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Alstom Holdings SA
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Alstom Holdings SA
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Publication date
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Publication of EP4112413A1 publication Critical patent/EP4112413A1/en
Application granted granted Critical
Publication of EP4112413B1 publication Critical patent/EP4112413B1/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
    • B61C9/28—Transmission systems in or for locomotives or motor railcars with rotary prime movers, e.g. turbines
    • B61C9/30—Transmission systems in or for locomotives or motor railcars with rotary prime movers, e.g. turbines mechanical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D13/00—Tramway vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F3/00—Types of bogies
    • B61F3/16—Types of bogies with a separate axle for each wheel

Definitions

  • the present invention relates to a bogie for a railway vehicle, the bogie comprising a chassis on which a body of the railway vehicle bears and railway wheels for supporting and guiding the chassis along a railway track.
  • a body having a lowered floor that is to say a floor fairly close to the ground and, preferably, extending substantially to the same level in the box, and to arrange in said box very wide circulation corridors. This facilitates the circulation of passengers in the railway vehicle and access to the railway vehicle from the outside, in particular for passengers having difficulty in moving around.
  • An object of the invention is to provide a railway vehicle bogie adapted to receive a body with a lowered floor while allowing a large angle of rotation between the frame of the bogie and the body of the vehicle.
  • the subject of the invention is a bogie of the aforementioned type, in which at least one of the railway wheels is a driving railway wheel carried by a wheel hub guided in rotation with respect to the chassis by means of a guide assembly in rotation comprising two rolling bearings and coupled to a traction motor via a gear transmission comprising an output gear having a drive gear wheel meshing with a driven gear wheel which is mounted on the wheel hub and which comprises a ring gear and a crown carrier offset axially relative to each other, the crown carrier being closer to the driving railway wheel than the ring gear.
  • the invention also relates to a railway vehicle comprising at least one bogie and a vehicle body carried by said bogie, the body comprising a lowered floor.
  • the Figure 1 represents a railway vehicle bogie 10 intended to equip a railway vehicle.
  • the railway vehicle is for example a railway vehicle intended for intra-urban transport such as a tramway.
  • the bogie 10 is provided to support and guide the railway vehicle along a railway track, in particular a railway track formed by two rows of parallel rails (not shown).
  • orientations are indicated with respect to a longitudinal direction X-X' corresponding to the ordinary direction of movement of the railway vehicle along the railway track, a transverse direction Y-Y' orthogonal to the longitudinal direction X-X', s 'extending in a horizontal plane in ordinary operation of the railway vehicle, and an elevation direction Z-Z' substantially orthogonal to the transverse direction Y-Y' and to the longitudinal direction X-X'.
  • the bogie 10 comprises a frame 12 and railway wheels 14.
  • the frame 12 is configured to support a box (not shown) delimiting a compartment for travelers, and the railway wheels 14 are configured to support and guide the frame 12 along the railway track.
  • Each railway wheel 14 is rotatably mounted on the frame 12 about a wheel axle.
  • the railway wheels 14 are associated in pairs thus forming two axles extending in the transverse direction Y-Y'.
  • the railway wheels 14 define between them a space E, represented on the Figure 1 .
  • the space E extending between the railway wheels 14 in the transverse direction Y-Y'.
  • the bogie 10 is configured to support a body (not shown) comprising a floor 15 lowered.
  • the area of the floor 15 located above the bogie 10 is for example located at a height less than the diameter of the railway wheels 14, the height being measured in the direction of elevation ZZ ' and relative to the tops of the rails of the railway.
  • the floor 15 of said body passes through the space E delimited transversely between the railway wheels 14 of an axle.
  • the zone of the floor 15 located above the bogie 10 extends for example at a height substantially equal to or less than 480 mm, in particular equal to or less than 450 mm, the height being measured in the direction of elevation Z-Z' and relative to the tops of the rails of the railway.
  • the floor 15 extends substantially at the same level over the entire body, including above the bogie 10.
  • the floor 15 located above the bogie 10 and extending between the railway wheels 14 advantageously has a width equal to or greater than 450 mm, in particular equal to or greater than 500 mm, the width being measured in the direction transverse Y-Y'.
  • Such a width of the floor 15 of said box facilitates the movement of passengers in the corridor.
  • the bogie 10 is a pivoting bogie.
  • the bogie 10 is configured to support the rail vehicle body by allowing the rail vehicle body to pivot relative to the frame 12 about a pivot axis substantially parallel to the elevation direction Z-Z', as is illustrated on the figure 2 .
  • the bogie 10 comprises for example a joint 13 which is configured so that the body bears on the frame 12 via this joint, allowing the body to pivot relative to the frame 12.
  • the floor 15 of the body can limit the maximum pivot angle ⁇ of the body relative to the bogie 10.
  • the pivot angle ⁇ of the body relative to the bogie 10 is measured relative to the longitudinal direction X-X'.
  • the arrangement of the transmission near the railway wheels 14 is designed so as to allow a satisfactory pivoting angle of the body relative to the bogey 10.
  • the bogie 10 is preferably configured such that the maximum authorized pivoting angle ⁇ of the body relative to the frame 12 is for example equal to or greater than 10°, in particular equal to or greater than 12.5°.
  • the bogie 10 is a motor bogie.
  • the bogie 10 comprises at least one traction motor 16, each traction motor 16 is coupled to at least one of the railway wheels 14 for driving this railway wheel 14 in rotation.
  • Each railway wheel 14 coupled to a traction motor 16 is a driving railway wheel 14 .
  • the bogie 10 comprises a respective traction motor 16 associated with each railway wheel 14 for driving this railway wheel 14 in rotation.
  • Each motor 16 is associated with a single wheel among the railway wheels 14.
  • Each motor 16 rotates only the associated railway wheel 14.
  • each motor 16 is located outside the space E located between the railway wheels 14 in the transverse direction Y-Y'.
  • each motor 16 does not clutter the space E to leave more room for the passage of the floor 15 of the body supported by the bogie 10.
  • Each driving railway wheel 14 is for example rotatably mounted on the frame 12 via an axle box 26 which integrates the transmission elements.
  • the bogie 10 preferably comprises a respective axle box 26 associated with each rail wheel 14 drive.
  • axle box 26 associated with each driving railway wheel 14 is located in the space E delimited transversely between the railway wheels 14.
  • Each driving railway wheel 14 is carried by a wheel hub 24 which is guided in rotation with respect to the chassis 12 by means of a rotation guide assembly 17 interposed between the wheel hub 24 carrying the railway wheel 14 and the axle box 26 associated to allow the rotation of the railway wheel 14 around its axis.
  • the rotation guide assembly 17 comprises two rolling bearings 50, 52, each rolling bearing 50, 52 being interposed between the wheel hub 24 and the axle box 26.
  • the rotation guide assembly 17 comprises for example a first rolling bearing 50 and a second rolling bearing 52 spaced from each other along the wheel hub 24.
  • the axle box 26 is hollow. It has an outer side wall and an inner side wall spaced transversely from each other, the inner side wall being closer to the median longitudinal plane of the bogie 10 than the outer side wall.
  • the outer side wall is closer to the rail wheel 14 than the inner side wall.
  • Each rolling bearing is for example interposed between the wheel hub 24 and a respective side wall of the axle box 26 from among the inner side wall and the outer side wall.
  • Each railway wheel 14 is rotationally coupled to an output shaft of the associated traction motor 16 via a gear transmission(s).
  • the gear(s) transmission is configured to transmit motion from the traction motor output shaft 16 to the wheel hub 24 carrying the rail wheel 14.
  • the gear(s) transmission is preferably housed internally of the axle box 26.
  • the transmission with gear(s) is configured for a ratio between the speed of rotation of the output shaft of the traction motor 16 and the speed of rotation of the wheel hub 24 carrying the railway wheel 14 which is strictly greater than 1.
  • the transmission with gear(s) thus forms a speed reducer.
  • the gear(s) transmission comprises an output gear 18 having a driving gear wheel 34 meshing with a driven gear wheel 36, which is for example keyed on the wheel hub carrying the railway wheel 14.
  • Driven gear 36 is coaxial with rail wheel 14 and wheel hub 24, on which it is mounted.
  • the driven gear wheel 36 includes a ring gear 38 carrying the teeth of the driven gear wheel 36, a crown carrier 40, and a connecting part 42 connecting the crown gear 38 to the crown carrier 40.
  • the crown carrier 40 is engaged on the wheel hub 24 in such a way that the driven toothed wheel 36 is connected in rotation with the wheel hub 24.
  • Crown carrier 40 and toothed crown 38 are offset axially with respect to each other. Crown carrier 40 is offset from crown gear 38 along wheel hub 24.
  • the connecting part 42 has for example a generally conical shape widening from the crown holder 40 towards the toothed crown 38.
  • the driven toothed wheel 36 defines a housing 43 which is delimited radially by the ring gear 38.
  • the driven toothed wheel 36 is for example mounted on the wheel hub 24 in such a way that the crown carrier 40 is closer to the railway wheel 14 than the toothed crown 38.
  • the housing 43 is located on the side of the driven toothed wheel 36 opposite rail wheel 14.
  • output gear 18 is a parallel axis gear with the axis of drive gear 34 parallel to the axis of driven gear 36.
  • driven gear 36 is located along wheel hub 24 between first rolling bearing 50 and second rolling bearing 52.
  • First rolling bearing 50 is located along wheel hub 24 between rail wheel 14 and driven sprocket 36.
  • the second rolling bearing 52 is located along the wheel hub 24 on the side of the driven sprocket 36 opposite the rail wheel 14.
  • the crown carrier 40 can be positioned axially closer to the railway wheel 14 than the toothed crown 38, and the second rolling bearing 52 can be brought closer to the railway wheel 14 with respect to the case where the crown carrier 40 would not be offset axially relative to the ring gear 38.
  • the second rolling bearing 52 is arranged along the wheel hub 24 in such a way that it is at least partly surrounded by the ring gear 38 of the driven gear wheel 36.
  • the second rolling bearing 52 is surrounded by the ring gear 38 of the driven gear wheel 36.
  • the second rolling bearing 52 is arranged along the wheel hub 24 in the housing 43 delimited radially by the ring gear 38, and in particular in the vertical plane formed by the ring gear 38. It is thus possible to limit the size of the output gear 18 located on the inner side of the railway wheel 14, to allow significant angular movement of the body supported by the bogie, despite the presence of a lowered floor 15 passing between the railway wheels 14.
  • the axle box 26 is for example provided with a decreasing width from a portion of the axle box 26 connected to the chassis towards a portion of the axle box 26 carrying the wheel hub 24.
  • the axle box 26 comprises an internal side wall 27 which can be inclined in such a way that it deviates transversely from the median vertical plane of the bogie 10 in a progressive manner when this internal side wall is traversed horizontally while moving away from the pivot axis of the body relative to the bogie 10.
  • the internal side wall 27 of the axle box 26 is inclined at an angle of inclination a, measured with respect to the longitudinal direction X-X', greater than 10°.
  • the angle of inclination ⁇ of the internal side wall 27 of the axle box 26 is substantially equal to the maximum authorized pivoting angle ⁇ of the body relative to the bogie 10.
  • Such a bogie 10 makes it possible to authorize pivoting between the frame 12 of the bogie and the body of the vehicle by an angle ⁇ greater than 10°, which allows the railway vehicle to operate on railway tracks with high curvatures (ie small radii of curvature).
  • the inclined internal side wall 27 of the axle box 26 offers the advantage of being able to maximize said angle of rotation and to define a floor 15 of the aisle of sufficient width to be able to allow the movement of passengers on said aisle.
  • the bogie 10 is suitable for carrying a body with a lowered floor 15.
  • the invention is not limited to the exemplary embodiments and to the variants described above, other exemplary embodiments and other variants being possible.
  • each of the railway wheels 14 is driven and associated with a dedicated traction motor.
  • the bogie 10 may comprise two traction motors 16.
  • the same traction motor 16 can be coupled to two driving railway wheels 14, these two driving railway wheels 14 being linked in rotation by a shaft, for example a shaft offset with respect to the axis of the railway wheels 14.
  • Such a transmission shaft is for example housed in a spacer crosspiece 32 extending transversely between the axle boxes 26 of these railway wheels 14.
  • the gear transmission(s) further comprises an input gear 46 interposed between the output shaft of the traction motor 16 and the output gear 18.
  • the input gear 46 is for example a gear with parallel axes, the axes of rotation of the toothed wheels of this input gear 46 being parallel to each other, and, preferably, to those of the output gear 18.
  • the two gears 18, 46 together form a gear train 47 configured to transmit the rotation of the motor output shaft 16 to the wheel hub 24 carrying the railway wheel 14.
  • the distance taken in the transverse direction Y-Y' between the input gear 46 and the rail wheel 14 is greater than the distance taken in the transverse direction Y-Y' between the output gear 18 and the rail wheel 14.
  • Input gear 46 and output gear 18 each have a reduction ratio strictly greater than 1 and then form a first reduction stage and a second reduction stage.
  • the transmission with gear(s) makes it possible, in addition to adjusting the transmission ratio between the motor 16 and the railway wheel 14, to transmit the torque from the traction motor 16 to the railway wheel 14 without aligning the axes of the hub.
  • the traction motor 16 and the railway wheel 14 are offset along the longitudinal direction X-X' and/or the elevation direction Z-Z', which allows a compact arrangement reducing the lateral bulk of the bogie 10.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Details Of Gearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Gear Transmission (AREA)

Abstract

Un bogie moteur pour véhicule ferroviaire comprend un châssis et des roues ferroviaires (14). Au moins une des roues ferroviaires (14) est une roue ferroviaire (14) motrice portée par un moyeu de roue (24) guidé en rotation par rapport au châssis par l'intermédiaire d'un ensemble de guidage en rotation (17) comprenant deux paliers à roulements (50, 52) et accouplée à un moteur de traction (16) par l'intermédiaire d'une transmission à engrenage(s) comprenant un engrenage de sortie (18) possédant une roue dentée menante (34) engrenant avec une roue dentée menée (36) qui est montée sur le moyeu de roue (24) et qui comprend une couronne dentée (38) et un porte-couronne (40) déportés axialement l'un par rapport à l'autre. Le porte-couronne (40) est plus proche de la roue ferroviaire (14) motrice que la couronne dentée (38).A motor bogie for a railway vehicle comprises a chassis and railway wheels (14). At least one of the railway wheels (14) is a driving railway wheel (14) carried by a wheel hub (24) guided in rotation with respect to the chassis via a rotation guide assembly (17) comprising two rolling bearings (50, 52) and coupled to a traction motor (16) via a gear transmission including an output gear (18) having a drive gear (34) meshing with a driven toothed wheel (36) which is mounted on the wheel hub (24) and which comprises a toothed crown (38) and a crown carrier (40) offset axially with respect to each other. The crown carrier (40) is closer to the driving railway wheel (14) than the toothed crown (38).

Description

La présente invention concerne un bogie pour véhicule ferroviaire, le bogie comprenant un châssis sur lequel une caisse du véhicule ferroviaire vient prendre appui et des roues ferroviaires pour supporter et guider le châssis le long d'une voie ferrée.The present invention relates to a bogie for a railway vehicle, the bogie comprising a chassis on which a body of the railway vehicle bears and railway wheels for supporting and guiding the chassis along a railway track.

Dans le domaine des véhicules ferroviaires, et notamment des véhicules ferroviaires destinés au transport intra-urbain comme par exemple les tramways multi articulés, il est connu d'installer des bogies aptes à n'autoriser qu'un léger débattement angulaire autour d'un axe vertical entre le châssis de ces bogies et les caisses du véhicule ferroviaire portées par ces bogies, pour faciliter le passage des courbes, les rotations principales ayant lieu entre les différentes caisses. On parle dans ce cas de bogie non pivotant.In the field of railway vehicles, and in particular railway vehicles intended for intra-urban transport such as for example multi-articulated trams, it is known to install bogies capable of allowing only a slight angular displacement around an axis vertical between the chassis of these bogies and the bodies of the railway vehicle carried by these bogies, to facilitate the passage of curves, the main rotations taking place between the different bodies. In this case, we speak of a non-pivoting bogie.

Cependant, si le véhicule ferroviaire est destiné à opérer sur des voies ferrées avec des rayons de courbure réduits, le concept de tramway multi articulé n'est pas adapté et il est souhaitable de maximiser l'angle de rotation autorisé entre le châssis du bogie et la caisse du véhicule ferroviaire, pour se rapprocher d'une conception plus conventionnelle. On parle dans ce cas de bogie pivotant.However, if the railway vehicle is intended to operate on railway tracks with reduced radii of curvature, the concept of a multi-articulated tram is not suitable and it is desirable to maximize the angle of rotation authorized between the bogie frame and the body of the railway vehicle, to approach a more conventional design. In this case, we speak of a pivoting bogie.

De plus, dans un véhicule ferroviaire destiné au transport intra-urbain, il est avantageux d'installer une caisse possédant un plancher abaissé, c'est-à-dire un plancher assez proche du sol et, de préférence, s'étendant sensiblement au même niveau dans la caisse, et d'aménager dans ladite caisse des couloirs de circulation de grande largeur. Cela facilite la circulation des voyageurs dans le véhicule ferroviaire et l'accès au véhicule ferroviaire depuis l'extérieur, notamment pour les voyageurs ayant des difficultés à se déplacer.In addition, in a railway vehicle intended for intra-urban transport, it is advantageous to install a body having a lowered floor, that is to say a floor fairly close to the ground and, preferably, extending substantially to the same level in the box, and to arrange in said box very wide circulation corridors. This facilitates the circulation of passengers in the railway vehicle and access to the railway vehicle from the outside, in particular for passengers having difficulty in moving around.

Or, une telle conception de véhicule ferroviaire à plancher abaissé réduit le volume libre sous la caisse. Un bogie portant une caisse d'un tel véhicule ferroviaire doit donc être adapté afin de réduire son encombrement.However, such a low-floor railway vehicle design reduces the free volume under the body. A bogie carrying a body of such a railway vehicle must therefore be adapted in order to reduce its size.

Un but de l'invention est de fournir un bogie de véhicule ferroviaire adapté pour recevoir une caisse à plancher abaissé tout en autorisant un angle de rotation important entre le châssis du bogie et la caisse du véhicule.An object of the invention is to provide a railway vehicle bogie adapted to receive a body with a lowered floor while allowing a large angle of rotation between the frame of the bogie and the body of the vehicle.

Ainsi, l'invention a pour objet un bogie du type précité, dans lequel au moins une des roues ferroviaires est une roue ferroviaire motrice portée par un moyeu de roue guidé en rotation par rapport au châssis par l'intermédiaire d'un ensemble de guidage en rotation comprenant deux paliers à roulements et accouplée à un moteur de traction par l'intermédiaire d'une transmission à engrenage(s) comprenant un engrenage de sortie possédant une roue dentée menante engrenant avec une roue dentée menée qui est montée sur le moyeu de roue et qui comprend une couronne dentée et un porte-couronne déportés axialement l'un par rapport à l'autre, le porte-couronne étant plus proche de la roue ferroviaire motrice que la couronne dentée.Thus, the subject of the invention is a bogie of the aforementioned type, in which at least one of the railway wheels is a driving railway wheel carried by a wheel hub guided in rotation with respect to the chassis by means of a guide assembly in rotation comprising two rolling bearings and coupled to a traction motor via a gear transmission comprising an output gear having a drive gear wheel meshing with a driven gear wheel which is mounted on the wheel hub and which comprises a ring gear and a crown carrier offset axially relative to each other, the crown carrier being closer to the driving railway wheel than the ring gear.

Selon des modes de réalisation particuliers de l'invention, le bogie présente l'une ou plusieurs des caractéristiques suivantes, prise(s) indépendamment ou selon toute combinaison techniquement réalisable :

  • un des paliers à roulement de l'ensemble de guidage en rotation est entouré par la couronne dentée de la roue dentée menée, notamment est agencé le long du moyeu de roue dans un logement délimité radialement par la couronne dentée de la roue dentée menée ;
  • un des paliers à roulement est situé le long du moyeu de roue entre la roue ferroviaire et la roue dentée menée, l'autre palier à roulement étant situé du côté de la roue dentée menée opposé à la roue ferroviaire ;
  • le moyeu de roue est monté rotatif sur le châssis par l'intermédiaire d'une boîte d'essieu, la transmission à engrenage(s) étant logée à l'intérieur de la boîte d'essieu ;
  • la boite d'essieu comprend une paroi latérale interne inclinée, et plus particulièrement selon un angle d'inclinaison, mesuré par rapport à la direction longitudinale X-X', supérieur à 10° ;
  • la transmission à engrenages comprend un engrenage d'entrée interposé entre un arbre de sortie du moteur de traction et l'engrenage de sortie, la distance prise selon la direction transversale Y-Y' entre l'engrenage d'entrée et la roue ferroviaire étant supérieure à la distance entre l'engrenage de sortie et la roue ferroviaire ;
  • le moteur est situé à l'extérieur d'un espace situé entre les roues ferroviaires ;
  • le bogie est configuré pour supporter une caisse de véhicule ferroviaire possédant un plancher passant dans l'espace délimité entre les roues ferroviaires, en autorisant un pivotement de la caisse par rapport au bogie autour d'un axe de pivotement sensiblement vertical ;
  • le bogie est configuré pour autoriser une rotation de la caisse par rapport au châssis autour de l'axe de pivotement avec un angle de pivotement maximal égal ou supérieur à 10°, en particulier égal ou supérieur 12,5°, pour un plancher s'étendant entre les roues ferroviaires en présentant une largeur égale ou supérieure à 450 mm, en particulier égale ou supérieure à 500 mm.
According to particular embodiments of the invention, the bogie has one or more of the following characteristics, taken independently or according to any technically feasible combination:
  • one of the rolling bearings of the rotation guide assembly is surrounded by the ring gear of the driven toothed wheel, in particular is arranged along the wheel hub in a housing delimited radially by the ring gear of the driven toothed wheel;
  • one of the rolling bearings is located along the wheel hub between the railway wheel and the driven toothed wheel, the other rolling bearing being located on the side of the driven toothed wheel opposite the railway wheel;
  • the wheel hub is rotatably mounted on the frame via an axle box, the gear transmission(s) being housed inside the axle box;
  • the axle box comprises an internal side wall inclined, and more particularly according to an angle of inclination, measured with respect to the longitudinal direction X-X', greater than 10°;
  • the gear transmission comprises an input gear interposed between an output shaft of the traction motor and the output gear, the distance taken in the transverse direction YY' between the input gear and the railway wheel being greater than the distance between the output gear and the rail wheel;
  • the engine is located outside a space located between the railway wheels;
  • the bogie is configured to support a railway vehicle body having a floor passing through the space delimited between the railway wheels, allowing the body to pivot relative to the bogie about a substantially vertical pivot axis;
  • the bogie is configured to allow rotation of the body relative to the frame around the pivot axis with a maximum pivot angle equal to or greater than 10°, in particular equal to or greater than 12.5°, for a floor s' extending between the railway wheels having a width equal to or greater than 450 mm, in particular equal to or greater than 500 mm.

L'invention concerne également un véhicule ferroviaire comprenant au moins un bogie et une caisse de véhicule portée par ledit bogie, la caisse comprenant un plancher abaissé.The invention also relates to a railway vehicle comprising at least one bogie and a vehicle body carried by said bogie, the body comprising a lowered floor.

L'invention sera mieux comprise à la lecture de la description qui suit, donnée à titre d'exemple et faite en référence aux dessins annexés, parmi lesquels :

  • la figure 1 est une vue en perspective d'un bogie ;
  • la figure 2 est une vue schématique de dessus du bogie de la figure 1, la caisse étant pivotée par rapport au châssis ; et
  • la figure 3 est une vue en coupe selon la ligne A-A du bogie de la figure 1, illustrant le montage d'une roue ferroviaire dans l'environnement de la transmission du bogie.
The invention will be better understood on reading the following description, given by way of example and made with reference to the appended drawings, among which:
  • the figure 1 is a perspective view of a bogie;
  • the figure 2 is a schematic top view of the bogie of the figure 1 , the body being pivoted relative to the frame; and
  • the picture 3 is a sectional view along line AA of the bogie of the figure 1 , illustrating the mounting of a railway wheel in the environment of the bogie transmission.

La Figure 1 représente un bogie 10 de véhicule ferroviaire destiné à équiper un véhicule ferroviaire. Le véhicule ferroviaire est par exemple un véhicule ferroviaire destiné au transport intra-urbain comme un tramway.The Figure 1 represents a railway vehicle bogie 10 intended to equip a railway vehicle. The railway vehicle is for example a railway vehicle intended for intra-urban transport such as a tramway.

Le bogie 10 est prévu pour supporter et guider le véhicule ferroviaire le long d'une voie ferrée, en particulier une voie ferrée formée de deux files de rails parallèles (non représentés).The bogie 10 is provided to support and guide the railway vehicle along a railway track, in particular a railway track formed by two rows of parallel rails (not shown).

Dans ce qui suit, les orientations sont indiquées par rapport à une direction longitudinale X-X' correspondant à la direction de circulation ordinaire du véhicule ferroviaire le long de la voie ferrée, une direction transversale Y-Y' orthogonale à la direction longitudinale X-X', s'étendant dans un plan horizontal dans un fonctionnement ordinaire du véhicule ferroviaire, et une direction d'élévation Z-Z' sensiblement orthogonale à la direction transversale Y-Y' et à la direction longitudinale X-X'.In what follows, the orientations are indicated with respect to a longitudinal direction X-X' corresponding to the ordinary direction of movement of the railway vehicle along the railway track, a transverse direction Y-Y' orthogonal to the longitudinal direction X-X', s 'extending in a horizontal plane in ordinary operation of the railway vehicle, and an elevation direction Z-Z' substantially orthogonal to the transverse direction Y-Y' and to the longitudinal direction X-X'.

Le bogie 10 comprend un châssis 12 et des roues ferroviaires 14.The bogie 10 comprises a frame 12 and railway wheels 14.

Le châssis 12 est configuré pour supporter une caisse (non représentée) délimitant un compartiment pour les voyageurs, et les roues ferroviaires 14 sont configurées pour supporter et guider le châssis 12 le long de la voie ferrée.The frame 12 is configured to support a box (not shown) delimiting a compartment for travelers, and the railway wheels 14 are configured to support and guide the frame 12 along the railway track.

Chaque roue ferroviaire 14 est montée en rotation sur le châssis 12 autour d'un axe de roue.Each railway wheel 14 is rotatably mounted on the frame 12 about a wheel axle.

Les roues ferroviaires 14 sont associées par paires formant ainsi deux essieux s'étendant selon la direction transversale Y-Y'.The railway wheels 14 are associated in pairs thus forming two axles extending in the transverse direction Y-Y'.

Les roues ferroviaires 14 définissent entre elles un espace E, représenté sur la Figure 1. L'espace E s'étendant entre les roues ferroviaires 14 selon la direction transversale Y-Y'.The railway wheels 14 define between them a space E, represented on the Figure 1 . The space E extending between the railway wheels 14 in the transverse direction Y-Y'.

Le bogie 10 est configuré pour supporter une caisse (non représentée) comprenant un plancher 15 abaissé.The bogie 10 is configured to support a body (not shown) comprising a floor 15 lowered.

Lorsque la caisse repose sur le châssis 12 du bogie 10, la zone du plancher 15 située au-dessus du bogie 10 est par exemple située à une hauteur inférieure au diamètre des roues ferroviaires 14, la hauteur étant mesurée selon la direction d'élévation Z-Z' et par rapport aux sommets des rails de la voie ferrée.When the body rests on the frame 12 of the bogie 10, the area of the floor 15 located above the bogie 10 is for example located at a height less than the diameter of the railway wheels 14, the height being measured in the direction of elevation ZZ ' and relative to the tops of the rails of the railway.

Dans la zone du plancher 15 située au-dessus du bogie 10, le plancher 15 de ladite caisse passe dans l'espace E délimité transversalement entre les roues ferroviaires 14 d'un essieu.In the area of the floor 15 located above the bogie 10, the floor 15 of said body passes through the space E delimited transversely between the railway wheels 14 of an axle.

La zone du plancher 15 située au-dessus du bogie 10 s'étend par exemple à une hauteur sensiblement égale ou inférieure à 480 mm, en particulier égale ou inférieure à 450 mm, la hauteur étant mesurée selon la direction d'élévation Z-Z' et par rapport aux sommets des rails de la voie ferrée.The zone of the floor 15 located above the bogie 10 extends for example at a height substantially equal to or less than 480 mm, in particular equal to or less than 450 mm, the height being measured in the direction of elevation Z-Z' and relative to the tops of the rails of the railway.

De préférence, le plancher 15 s'étend sensiblement au même niveau sur l'ensemble de la caisse, y compris au-dessus du bogie 10.Preferably, the floor 15 extends substantially at the same level over the entire body, including above the bogie 10.

Dans la zone du plancher 15 située au-dessus du bogie 10 et s'étendant entre les roues ferroviaires 14, présente avantageusement une largeur égale ou supérieure à 450 mm, en particulier égale ou supérieure à 500 mm, la largeur étant mesurée selon la direction transversale Y-Y'.In the area of the floor 15 located above the bogie 10 and extending between the railway wheels 14, advantageously has a width equal to or greater than 450 mm, in particular equal to or greater than 500 mm, the width being measured in the direction transverse Y-Y'.

Une telle largeur du plancher 15 de ladite caisse facilite une circulation des passagers dans le couloir.Such a width of the floor 15 of said box facilitates the movement of passengers in the corridor.

Le bogie 10 est un bogie pivotant. Le bogie 10 est configuré pour supporter la caisse de véhicule ferroviaire en autorisant un pivotement de la caisse de véhicule ferroviaire par rapport au châssis 12 autour d'un axe de pivotement sensiblement parallèle à la direction d'élévation Z-Z', comme cela est illustré sur la figure 2.The bogie 10 is a pivoting bogie. The bogie 10 is configured to support the rail vehicle body by allowing the rail vehicle body to pivot relative to the frame 12 about a pivot axis substantially parallel to the elevation direction Z-Z', as is illustrated on the figure 2 .

Le bogie 10 comprend par exemple une articulation 13 qui est configurée pour que la caisse prenne appui sur le châssis 12 par l'intermédiaire de cette articulation en autorisant le pivotement de la caisse par rapport au châssis 12.The bogie 10 comprises for example a joint 13 which is configured so that the body bears on the frame 12 via this joint, allowing the body to pivot relative to the frame 12.

Du fait du passage du plancher 15 de la caisse dans l'espace E délimité entre les roues ferroviaires 14, le plancher 15 de la caisse peut limiter l'angle de pivotement β maximal de la caisse par rapport au bogie 10.Due to the passage of the floor 15 of the body in the space E delimited between the railway wheels 14, the floor 15 of the body can limit the maximum pivot angle β of the body relative to the bogie 10.

L'angle de pivotement β de la caisse par rapport au bogie 10 est mesuré par rapport à la direction longitudinale X-X'.The pivot angle β of the body relative to the bogie 10 is measured relative to the longitudinal direction X-X'.

L'agencement de la transmission à proximité des roues ferroviaires 14 est conçu de manière à autoriser un angle de pivotement satisfaisant de la caisse par rapport au boge 10.The arrangement of the transmission near the railway wheels 14 is designed so as to allow a satisfactory pivoting angle of the body relative to the bogey 10.

Le bogie 10 est de préférence configuré de telle sorte que l'angle de pivotement β maximal autorisé de la caisse par rapport au châssis 12 est par exemple égal ou supérieur à 10°, en particulier égal ou supérieur à 12,5°.The bogie 10 is preferably configured such that the maximum authorized pivoting angle β of the body relative to the frame 12 is for example equal to or greater than 10°, in particular equal to or greater than 12.5°.

Le bogie 10 est un bogie moteur. Le bogie 10 comprend au moins un moteur de traction 16, chaque moteur de traction 16 est couplé à au moins une des roues ferroviaire 14 pour l'entraînement en rotation de cette roue ferroviaire 14.The bogie 10 is a motor bogie. The bogie 10 comprises at least one traction motor 16, each traction motor 16 is coupled to at least one of the railway wheels 14 for driving this railway wheel 14 in rotation.

Chaque roue ferroviaire 14 couplée à un moteur de traction 16 est une roue ferroviaire 14 motrice.Each railway wheel 14 coupled to a traction motor 16 is a driving railway wheel 14 .

Dans l'exemple illustré sur la Figure 1, le bogie 10 comprend un moteur de traction 16 respectif associé à chaque roue ferroviaire 14 pour l'entraînement en rotation de cette roue ferroviaire 14. Chaque moteur 16 est associé à une unique roue parmi les roues ferroviaires 14. Chaque moteur 16 entraîne en rotation uniquement la roue ferroviaire 14 associée.In the example shown in the Figure 1 , the bogie 10 comprises a respective traction motor 16 associated with each railway wheel 14 for driving this railway wheel 14 in rotation. Each motor 16 is associated with a single wheel among the railway wheels 14. Each motor 16 rotates only the associated railway wheel 14.

Avantageusement, chaque moteur 16 est situé à l'extérieur de l'espace E situé entre les roues ferroviaires 14 selon la direction transversale Y-Y'. Ainsi, chaque moteur 16 n'encombre pas l'espace E pour laisser plus de place pour le passage du plancher 15 de la caisse supportée par le bogie 10.Advantageously, each motor 16 is located outside the space E located between the railway wheels 14 in the transverse direction Y-Y'. Thus, each motor 16 does not clutter the space E to leave more room for the passage of the floor 15 of the body supported by the bogie 10.

Chaque roue ferroviaire 14 motrice est par exemple montée rotative sur le châssis 12 par l'intermédiaire d'une boîte d'essieu 26 qui intègre les éléments de transmission. Le bogie 10 comprend de préférence une boîte d'essieu 26 respective associée à chaque roue ferroviaire 14 motrice.Each driving railway wheel 14 is for example rotatably mounted on the frame 12 via an axle box 26 which integrates the transmission elements. The bogie 10 preferably comprises a respective axle box 26 associated with each rail wheel 14 drive.

Dans un exemple de réalisation, la boîte d'essieu 26 associée à chaque roue ferroviaire 14 motrice est située dans l'espace E délimité transversalement entre les roues ferroviaires 14.In an exemplary embodiment, the axle box 26 associated with each driving railway wheel 14 is located in the space E delimited transversely between the railway wheels 14.

Le montage d'une roue ferroviaire 14 motrice et son couplage au moteur de traction 16 associé sont décrits par la suite en référence à la Figure 3 qui illustre une vue en coupe prise selon A-A sur la Figure 1, d'une boite d'essieu 26 associée à une roue ferroviaire 14 et un moteur de traction 16.The mounting of a driving railway wheel 14 and its coupling to the associated traction motor 16 are described below with reference to the Figure 3 which illustrates a sectional view taken according to AA on the Figure 1 , an axle box 26 associated with a railway wheel 14 and a traction motor 16.

Chaque roue ferroviaire 14 motrice est portée par un moyeu de roue 24 qui est guidé en rotation par rapport au châssis 12 par l'intermédiaire d'un ensemble de guidage en rotation 17 interposé entre le moyeu de roue 24 portant la roue ferroviaire 14 et la boîte d'essieu 26 associée pour permettre la rotation de la roue ferroviaire 14 autour de son axe.Each driving railway wheel 14 is carried by a wheel hub 24 which is guided in rotation with respect to the chassis 12 by means of a rotation guide assembly 17 interposed between the wheel hub 24 carrying the railway wheel 14 and the axle box 26 associated to allow the rotation of the railway wheel 14 around its axis.

L'ensemble de guidage en rotation 17 comprend deux paliers à roulement 50, 52, chaque palier à roulement 50, 52 étant interposé entre le moyeu de roue 24 et la boîte d'essieu 26.The rotation guide assembly 17 comprises two rolling bearings 50, 52, each rolling bearing 50, 52 being interposed between the wheel hub 24 and the axle box 26.

L'ensemble de guidage en rotation 17 comprend par exemple un premier palier à roulement 50 et un deuxième palier à roulement 52 espacés l'un de l'autre le long du moyeu de roue 24.The rotation guide assembly 17 comprises for example a first rolling bearing 50 and a second rolling bearing 52 spaced from each other along the wheel hub 24.

La boîte d'essieu 26 est creuse. Elle possède une paroi latérale externe et une paroi latérale interne espacées transversalement l'une de l'autre, la paroi latérale interne étant plus proche du plan longitudinal médian du bogie 10 que la paroi latérale externe. La paroi latérale externe est plus proche de la roue ferroviaire 14 que la paroi latérale interne.The axle box 26 is hollow. It has an outer side wall and an inner side wall spaced transversely from each other, the inner side wall being closer to the median longitudinal plane of the bogie 10 than the outer side wall. The outer side wall is closer to the rail wheel 14 than the inner side wall.

Chaque palier à roulement est par exemple interposé entre le moyeu de roue 24 et une paroi latérale respective de la boîte d'essieu 26 parmi la paroi latérale interne et la paroi latérale externe.Each rolling bearing is for example interposed between the wheel hub 24 and a respective side wall of the axle box 26 from among the inner side wall and the outer side wall.

Chaque roue ferroviaire 14 est couplée en rotation à un arbre de sortie du moteur de traction 16 associé par l'intermédiaire d'une transmission à engrenage(s).Each railway wheel 14 is rotationally coupled to an output shaft of the associated traction motor 16 via a gear transmission(s).

La transmission à engrenage(s) est configurée pour transmettre le mouvement de l'arbre de sortie du moteur de traction 16 au moyeu de roue 24 portant la roue ferroviaire 14. La transmission à engrenage(s) est de préférence logée à l'intérieur de la boîte d'essieu 26.The gear(s) transmission is configured to transmit motion from the traction motor output shaft 16 to the wheel hub 24 carrying the rail wheel 14. The gear(s) transmission is preferably housed internally of the axle box 26.

Avantageusement, la transmission à engrenage(s) est configurée pour un rapport entre la vitesse de rotation de l'arbre de sortie du moteur de traction 16 et la vitesse de rotation du moyeu de roue 24 portant la roue ferroviaire 14 qui est strictement supérieur à 1. La transmission à engrenage(s) forme ainsi un réducteur de vitesse.Advantageously, the transmission with gear(s) is configured for a ratio between the speed of rotation of the output shaft of the traction motor 16 and the speed of rotation of the wheel hub 24 carrying the railway wheel 14 which is strictly greater than 1. The transmission with gear(s) thus forms a speed reducer.

La transmission à engrenage(s) comprend un engrenage de sortie 18 possédant une roue dentée menante 34 engrenant avec une roue dentée menée 36, qui est par exemple calée sur le moyeu de roue portant la roue ferroviaire 14.The gear(s) transmission comprises an output gear 18 having a driving gear wheel 34 meshing with a driven gear wheel 36, which is for example keyed on the wheel hub carrying the railway wheel 14.

La roue dentée menée 36 est coaxiale à la roue ferroviaire 14 et au moyeu de roue 24, sur lequel elle est montée.Driven gear 36 is coaxial with rail wheel 14 and wheel hub 24, on which it is mounted.

La roue dentée menée 36 comprend une couronne dentée 38 portant la denture de la roue dentée menée 36, un porte-couronne 40, et une partie de liaison 42 reliant la couronne dentée 38 au porte-couronne 40.The driven gear wheel 36 includes a ring gear 38 carrying the teeth of the driven gear wheel 36, a crown carrier 40, and a connecting part 42 connecting the crown gear 38 to the crown carrier 40.

Le porte-couronne 40 est engagé sur le moyeu de roue 24 de telle manière que la roue dentée menée 36 est liée en rotation avec le moyeu de roue 24.The crown carrier 40 is engaged on the wheel hub 24 in such a way that the driven toothed wheel 36 is connected in rotation with the wheel hub 24.

Le porte-couronne 40 et la couronne dentée 38 sont déportés axialement l'un par rapport à l'autre. Le porte-couronne 40 est décalé par rapport à la couronne dentée 38 le long du moyeu de roue 24.Crown carrier 40 and toothed crown 38 are offset axially with respect to each other. Crown carrier 40 is offset from crown gear 38 along wheel hub 24.

La partie de liaison 42 présente par exemple une forme générale conique s'évasant depuis le porte-couronne 40 vers la couronne dentée 38.The connecting part 42 has for example a generally conical shape widening from the crown holder 40 towards the toothed crown 38.

Du fait du déport axial relatif de la couronne dentée 38 et du porte-couronne 40, la roue dentée menée 36 définit un logement 43 qui est délimité radialement par la couronne dentée 38.Due to the relative axial offset of the ring gear 38 and the ring gear 40, the driven toothed wheel 36 defines a housing 43 which is delimited radially by the ring gear 38.

La roue dentée menée 36 est par exemple montée sur le moyeu de roue 24 de telle manière que le porte-couronne 40 est plus proche de la roue ferroviaire 14 que la couronne dentée 38. Le logement 43 est situé du côté de la roue dentée menée 36 opposé à la roue ferroviaire 14.The driven toothed wheel 36 is for example mounted on the wheel hub 24 in such a way that the crown carrier 40 is closer to the railway wheel 14 than the toothed crown 38. The housing 43 is located on the side of the driven toothed wheel 36 opposite rail wheel 14.

De préférence, l'engrenage de sortie 18 est un engrenage à axes parallèles, l'axe de la roue dentée menante 34 étant parallèle à l'axe de la roue dentée menée 36.Preferably, output gear 18 is a parallel axis gear with the axis of drive gear 34 parallel to the axis of driven gear 36.

De préférence, la roue dentée menée 36 se situe le long du moyeu de roue 24 entre le premier palier à roulement 50 et le deuxième palier à roulement 52.Preferably, driven gear 36 is located along wheel hub 24 between first rolling bearing 50 and second rolling bearing 52.

Le premier palier à roulement 50 est situé le long du moyeu de roue 24 entre la roue ferroviaire 14 et la roue dentée menée 36.First rolling bearing 50 is located along wheel hub 24 between rail wheel 14 and driven sprocket 36.

Le deuxième palier à roulement 52 est situé le long du moyeu de roue 24 du côté de la roue dentée menée 36 opposé à la roue ferroviaire 14.The second rolling bearing 52 is located along the wheel hub 24 on the side of the driven sprocket 36 opposite the rail wheel 14.

Le déport axial relatif de la couronne dentée 38 et du porte-couronne 40 de la roue dentée menée 36 calée sur le moyeu de roue 24 permet un agencement axialement compact de l'ensemble de guidage en rotation 17 et de la roue dentée menée 36 le long du moyeu de roue 24, tout en permettant l'engrènement de la roue dentée menée 36 avec la roue dentée menante 34 de l'engrenage de sortie 18.The relative axial offset of the toothed crown 38 and of the crown carrier 40 of the driven toothed wheel 36 wedged on the wheel hub 24 allows an axially compact arrangement of the rotation guide assembly 17 and of the driven toothed wheel 36 the along wheel hub 24, while allowing driven gear 36 to mesh with drive gear 34 of output gear 18.

En particulier, le porte-couronne 40 peut être positionné axialement plus proche de la roue ferroviaire 14 que la couronne dentée 38, et le deuxième palier à roulement 52 peut être rapproché de la roue ferroviaire 14 par rapport à au cas où le porte-couronne 40 ne serait pas déporté axialement par rapport à la couronne dentée 38.In particular, the crown carrier 40 can be positioned axially closer to the railway wheel 14 than the toothed crown 38, and the second rolling bearing 52 can be brought closer to the railway wheel 14 with respect to the case where the crown carrier 40 would not be offset axially relative to the ring gear 38.

Le deuxième palier à roulement 52 est disposé le long du moyeu de roue 24 de telle manière qu'il est au moins en partie entouré par la couronne dentée 38 de la roue dentée menée 36.The second rolling bearing 52 is arranged along the wheel hub 24 in such a way that it is at least partly surrounded by the ring gear 38 of the driven gear wheel 36.

Comme cela est visible sur la Figure 3, le deuxième palier à roulement 52 est entouré par la couronne dentée 38 de la roue dentée menée 36.As can be seen on the Figure 3 , the second rolling bearing 52 is surrounded by the ring gear 38 of the driven gear wheel 36.

Autrement dit, le deuxième palier à roulement 52 est agencé le long du moyeu de roue 24 dans le logement 43 délimité radialement par la couronne dentée 38, et notamment dans le plan vertical formé par la couronne dentée 38. Il est ainsi possible de limiter l'encombrement de l'engrenage de sortie 18 situé du côté interne de la roue ferroviaire 14, pour permettre un débattement angulaire important de la caisse supportée par le bogie, malgré la présence d'un plancher 15 abaissé passant entre les roues ferroviaires 14.In other words, the second rolling bearing 52 is arranged along the wheel hub 24 in the housing 43 delimited radially by the ring gear 38, and in particular in the vertical plane formed by the ring gear 38. It is thus possible to limit the size of the output gear 18 located on the inner side of the railway wheel 14, to allow significant angular movement of the body supported by the bogie, despite the presence of a lowered floor 15 passing between the railway wheels 14.

En particulier, comme illustré sur la Figure 3, la boîte d'essieu 26 est par exemple prévue avec une largeur décroissante depuis une portion de la boîte d'essieu 26 reliée au châssis vers une portion de la boîte d'essieu 26 portant le moyeu de roue 24.In particular, as illustrated in the Figure 3 , the axle box 26 is for example provided with a decreasing width from a portion of the axle box 26 connected to the chassis towards a portion of the axle box 26 carrying the wheel hub 24.

La boîte d'essieu 26 comprend une paroi latérale interne 27 pouvant être inclinée de telle manière qu'elle s'écarte transversalement du plan vertical médian du bogie 10 de manière progressive lorsque l'on parcourt cette paroi latérale interne horizontalement en s'éloignant de l'axe de pivotement de la caisse par rapport au bogie 10.The axle box 26 comprises an internal side wall 27 which can be inclined in such a way that it deviates transversely from the median vertical plane of the bogie 10 in a progressive manner when this internal side wall is traversed horizontally while moving away from the pivot axis of the body relative to the bogie 10.

Avantageusement, la paroi latérale interne 27 de la boîte d'essieu 26 est inclinée selon un angle d'inclinaison a, mesuré par rapport à la direction longitudinale X-X', supérieur à 10°.Advantageously, the internal side wall 27 of the axle box 26 is inclined at an angle of inclination a, measured with respect to the longitudinal direction X-X', greater than 10°.

Comme illustré sur la figure 2, l'angle d'inclinaison α de la paroi latérale interne 27 de la boîte d'essieu 26 est sensiblement égal à l'angle de pivotement β maximal autorisé de la caisse par rapport au bogie 10. Un tel bogie 10 permet d'autoriser un pivotement entre le châssis 12 du bogie et la caisse du véhicule d'un angle β supérieur à 10°, ce qui permet au véhicule ferroviaire d'opérer sur des voies ferrées avec des courbures élevées (i.e. des rayons de courbure faibles).As illustrated on the picture 2 , the angle of inclination α of the internal side wall 27 of the axle box 26 is substantially equal to the maximum authorized pivoting angle β of the body relative to the bogie 10. Such a bogie 10 makes it possible to authorize pivoting between the frame 12 of the bogie and the body of the vehicle by an angle β greater than 10°, which allows the railway vehicle to operate on railway tracks with high curvatures (ie small radii of curvature).

La paroi latérale interne 27 inclinée de la boite d'essieu 26 offre l'avantage de pouvoir maximiser ledit angle de rotation et de définir un plancher 15 de couloir de largeur suffisante pour pouvoir autoriser la circulation des passagers sur ledit couloir.The inclined internal side wall 27 of the axle box 26 offers the advantage of being able to maximize said angle of rotation and to define a floor 15 of the aisle of sufficient width to be able to allow the movement of passengers on said aisle.

Grâce à ce faible encombrement, le bogie 10 est adapté pour porter une caisse à plancher 15 abaissé.Thanks to this small size, the bogie 10 is suitable for carrying a body with a lowered floor 15.

L'invention n'est pas limitée aux exemples de réalisation et aux variantes décrits ci-dessus, d'autres exemples de réalisation et d'autres variantes étant envisageables.The invention is not limited to the exemplary embodiments and to the variants described above, other exemplary embodiments and other variants being possible.

Dans l'exemple de réalisation illustré, chacune des roues ferroviaire 14 est motrice et associée à un moteur de traction dédié.In the illustrated embodiment, each of the railway wheels 14 is driven and associated with a dedicated traction motor.

En variante, seules certaines roues ferroviaires 14 sont motrices. Il est par exemple possible de prévoir que les deux roues ferroviaires 14 d'une même paire sont motrices, les deux roues ferroviaires 14 de l'autre paire étant non-motrices.Alternatively, only certain railway wheels 14 are driven. It is for example possible to provide that the two railway wheels 14 of the same pair are driven, the two railway wheels 14 of the other pair being non-driven.

Dans un tel exemple de réalisation, le bogie 10 peut comprendre deux moteurs de traction 16.In such an embodiment, the bogie 10 may comprise two traction motors 16.

Par ailleurs, un même moteur de traction 16 peut être couplé à deux roues ferroviaires 14 motrices, ces deux roues ferroviaires 14 motrices étant liées en rotation par un arbre, par exemple un arbre déporté par rapport à l'axe des roues ferroviaires 14.Furthermore, the same traction motor 16 can be coupled to two driving railway wheels 14, these two driving railway wheels 14 being linked in rotation by a shaft, for example a shaft offset with respect to the axis of the railway wheels 14.

Un tel arbre de transmission est par exemple logé dans une traverse d'écartement 32 s'étendant transversalement entre les boîtes d'essieu 26 de ces roues ferroviaires 14.Such a transmission shaft is for example housed in a spacer crosspiece 32 extending transversely between the axle boxes 26 of these railway wheels 14.

Par ailleurs, comme illustré sur la Figure 3, la transmission à engrenage(s) comprend en outre un engrenage d'entrée 46 interposé entre l'arbre de sortie du moteur de traction 16 et l'engrenage de sortie 18.Moreover, as illustrated in the Figure 3 , the gear transmission(s) further comprises an input gear 46 interposed between the output shaft of the traction motor 16 and the output gear 18.

L'engrenage d'entrée 46 est par exemple un engrenage à axes parallèles, les axes de rotation des roues dentées de cette engrenage d'entrée 46 étant parallèles entre eux, et, de préférence, à ceux de l'engrenage de sortie 18.The input gear 46 is for example a gear with parallel axes, the axes of rotation of the toothed wheels of this input gear 46 being parallel to each other, and, preferably, to those of the output gear 18.

Les deux engrenages 18, 46 forment ensemble un train d'engrenages 47 configuré pour transmettre la rotation de l'arbre de sortie du moteur 16 au moyeu de roue 24 portant la roue ferroviaire 14.The two gears 18, 46 together form a gear train 47 configured to transmit the rotation of the motor output shaft 16 to the wheel hub 24 carrying the railway wheel 14.

Comme illustré sur la figure 3, l'engrenage d'entrée 46 est décalé vers l'intérieur du bogie 10 et l'engrenage de sortie 18 est décalé vers la roue 14.As illustrated on the picture 3 , input gear 46 is shifted inboard of bogie 10 and output gear 18 is shifted toward wheel 14.

Autrement dit, la distance prise selon la direction transversale Y-Y' entre l'engrenage d'entrée 46 et la roue ferroviaire 14 est supérieure à la distance prise selon la direction transversale Y-Y' entre l'engrenage de sortie 18 et la roue ferroviaire 14.In other words, the distance taken in the transverse direction Y-Y' between the input gear 46 and the rail wheel 14 is greater than the distance taken in the transverse direction Y-Y' between the output gear 18 and the rail wheel 14.

De même, la distance prise selon la direction transversale Y-Y' entre l'engrenage d'entrée 46 et la roue ferroviaire 14 est supérieure à la distance prise selon la direction transversale Y-Y' entre le deuxième palier à roulement 52 et la roue ferroviaire 14. L'engrenage d'entrée 46 et l'engrenage de sortie 18 présente chacun un rapport de réduction strictement supérieur à 1 et forment alors un premier étage de réduction et un deuxième étage de réduction.Similarly, the distance taken in the transverse direction Y-Y' between the input gear 46 and the rail wheel 14 is greater than the distance taken in the transverse direction Y-Y' between the second rolling bearing 52 and the rail wheel 14. Input gear 46 and output gear 18 each have a reduction ratio strictly greater than 1 and then form a first reduction stage and a second reduction stage.

Avantageusement, la transmission à engrenage(s) permet, en plus d'ajuster le rapport de transmission entre le moteur 16 et la roue ferroviaire 14, de transmettre le couple du moteur de traction 16 à la roue ferroviaire 14 sans aligner les axes du moyeu de roue 24 portant la roue ferroviaire 14 et de l'arbre de sortie du moteur de traction 16 selon la direction transversale Y-Y'. Ainsi, le moteur de traction 16 et la roue ferroviaire 14 sont décalés selon la direction longitudinale X-X' et/ou la direction d'élévation Z-Z', ce qui permet un agencement compact réduisant l'encombrement latéral du bogie 10.Advantageously, the transmission with gear(s) makes it possible, in addition to adjusting the transmission ratio between the motor 16 and the railway wheel 14, to transmit the torque from the traction motor 16 to the railway wheel 14 without aligning the axes of the hub. wheel 24 carrying the railway wheel 14 and the output shaft of the traction motor 16 in the transverse direction Y-Y'. Thus, the traction motor 16 and the railway wheel 14 are offset along the longitudinal direction X-X' and/or the elevation direction Z-Z', which allows a compact arrangement reducing the lateral bulk of the bogie 10.

Claims (10)

Bogie moteur pour véhicule ferroviaire, comprenant un châssis (12) et des roues ferroviaires (14), dans lequel au moins une des roues ferroviaires (14) est une roue ferroviaire (14) motrice portée par un moyeu de roue (24) guidé en rotation par rapport au châssis (12) par l'intermédiaire d'un ensemble de guidage en rotation (17) comprenant deux paliers à roulements (50, 52) et accouplée à un moteur de traction (16) par l'intermédiaire d'une transmission à engrenage(s) comprenant un engrenage de sortie (18) possédant une roue dentée menante (34) engrenant avec une roue dentée menée (36) qui est montée sur le moyeu de roue (24) et qui comprend une couronne dentée (38) et un porte-couronne (40) déportés axialement l'un par rapport à l'autre, le porte-couronne (40) étant plus proche de la roue ferroviaire (14) motrice que la couronne dentée (38), le bogie étant configuré pour supporter une caisse de véhicule ferroviaire possédant un plancher (15) passant dans l'espace (E) délimité entre les roues ferroviaires (14), en autorisant un pivotement de la caisse par rapport au bogie (10) autour d'un axe de pivotement sensiblement vertical.Motor bogie for a railway vehicle, comprising a chassis (12) and railway wheels (14), in which at least one of the railway wheels (14) is a driving railway wheel (14) carried by a wheel hub (24) guided in rotation relative to the frame (12) via a rotation guide assembly (17) comprising two roller bearings (50, 52) and coupled to a traction motor (16) via a gear(s) transmission comprising an output gear (18) having a drive gear (34) meshing with a driven gear (36) which is mounted on the wheel hub (24) and which includes a ring gear (38 ) and a crown carrier (40) axially offset relative to each other, the crown carrier (40) being closer to the driving railway wheel (14) than the toothed crown (38), the bogie being configured to support a railway vehicle body having a floor (15) passing through the space (E) delimited between the s railway wheels (14), allowing the body to pivot relative to the bogie (10) about a substantially vertical pivot axis. Bogie selon la revendication 1, dans lequel un des paliers à roulement (52) de l'ensemble de guidage en rotation (17) est entouré par la couronne dentée (38) de la roue dentée menée (36), notamment est agencé le long du moyeu de roue (24) dans un logement (43) délimité radialement par la couronne dentée (38) de la roue dentée menée (36).Bogie according to Claim 1, in which one of the rolling bearings (52) of the rotation guide assembly (17) is surrounded by the ring gear (38) of the driven toothed wheel (36), in particular is arranged along of the wheel hub (24) in a housing (43) delimited radially by the ring gear (38) of the driven toothed wheel (36). Bogie selon l'une quelconque des revendications précédentes, dans lequel un des paliers à roulement (50) est situé le long du moyeu de roue (24) entre la roue ferroviaire (14) et la roue dentée menée (36), l'autre palier à roulement (52) étant situé du côté de la roue dentée menée (36) opposé à la roue ferroviaire (14).A bogie as claimed in any preceding claim, wherein one of the rolling bearings (50) is located along the wheel hub (24) between the rail wheel (14) and the driven sprocket (36), the other rolling bearing (52) being located on the side of the driven gear wheel (36) opposite the rail wheel (14). Bogie selon l'une quelconque des revendications précédentes, dans lequel le moyeu de roue (24) est monté rotatif sur le châssis (12) par l'intermédiaire d'une boîte d'essieu (26), la transmission à engrenage(s) étant logée à l'intérieur de la boîte d'essieu (26).A bogie according to any preceding claim, wherein the wheel hub (24) is rotatably mounted on the frame (12) via an axle box (26), the gear transmission(s) being housed inside the axle box (26). Bogie selon la revendication 4, dans lequel la boite d'essieu (26) comprend une paroi latérale interne (27) inclinée, et plus particulièrement selon un angle d'inclinaison (a), mesuré par rapport à la direction longitudinale X-X', supérieur à 10°.Bogie according to Claim 4, in which the axle box (26) comprises an internal lateral wall (27) inclined, and more particularly according to an angle of inclination (a), measured with respect to the longitudinal direction X-X' , greater than 10°. Bogie selon l'une quelconque des revendications précédentes, dans lequel la transmission à engrenages comprend un engrenage d'entrée (46) interposé entre un arbre de sortie du moteur de traction (16) et l'engrenage de sortie (18), la distance prise selon la direction transversale Y-Y' entre l'engrenage d'entrée (46) et la roue ferroviaire (14) étant supérieure à la distance entre l'engrenage de sortie (18) et la roue ferroviaire (14).A bogie as claimed in any preceding claim, wherein the gear transmission comprises an input gear (46) interposed between a traction motor output shaft (16) and the output gear (18), the distance taken in the transverse direction YY' between the input gear (46) and the railway wheel (14) being greater than the distance between the output gear (18) and the railway wheel (14). Bogie selon l'une quelconque des revendications précédentes, dans lequel le moteur (16) est situé à l'extérieur d'un espace (E) situé entre les roues ferroviaires (14).Bogie according to any one of the preceding claims, in which the motor (16) is located outside a space (E) located between the railway wheels (14). Bogie selon l'une quelconque des revendications précédentes, dans lequel le bogie (10) est configuré pour autoriser une rotation de la caisse par rapport au châssis (12) autour de l'axe de pivotement avec un angle de pivotement (β) maximal égal ou supérieur à 10°, en particulier égal ou supérieur 12,5°, pour un plancher (15) s'étendant entre les roues ferroviaires (14) en présentant une largeur égale ou supérieure à 450 mm, en particulier égale ou supérieure à 500 mm.Bogie according to any one of the preceding claims, in which the bogie (10) is configured to allow rotation of the body relative to the frame (12) around the pivot axis with a maximum pivot angle (β) equal or greater than 10°, in particular equal to or greater than 12.5°, for a floor (15) extending between the railway wheels (14) having a width equal to or greater than 450 mm, in particular equal to or greater than 500 mm. Bogie selon l'une quelconque des revendications 4 à 8, dans lequel la boîte d'essieu (26) associée à chaque roue ferroviaire (14) motrice est située dans l'espace (E) délimité transversalement entre les roues ferroviaires (14).Bogie according to any one of Claims 4 to 8, in which the axle box (26) associated with each driving railway wheel (14) is located in the space (E) delimited transversely between the railway wheels (14). Véhicule ferroviaire comprenant au moins un bogie (10) selon l'une des revendications précédentes, et une caisse de véhicule portée par ledit bogie (10), la caisse comprenant un plancher (15) abaissé.Railway vehicle comprising at least one bogie (10) according to one of the preceding claims, and a vehicle body carried by said bogie (10), the body comprising a lowered floor (15).
EP22181266.2A 2021-06-28 2022-06-27 Bogie and associated railway vehicle Active EP4112413B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2106917A FR3124472A1 (en) 2021-06-28 2021-06-28 Bogie and associated rail vehicle

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EP4112413A1 true EP4112413A1 (en) 2023-01-04
EP4112413B1 EP4112413B1 (en) 2023-11-01

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833858U (en) * 1981-08-31 1983-03-05 東洋電機製造株式会社 Vehicle gear system
EP0465346A1 (en) * 1990-07-05 1992-01-08 Gec Alsthom Sa Bogie with independently driven wheels for a railway vehicle
EP1247714A1 (en) * 2001-04-02 2002-10-09 Alstom Bogie for railway vehicles with variable gauge wheels
EP3650304A1 (en) * 2018-11-06 2020-05-13 ALSTOM Transport Technologies Bogie for rail vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833858U (en) * 1981-08-31 1983-03-05 東洋電機製造株式会社 Vehicle gear system
EP0465346A1 (en) * 1990-07-05 1992-01-08 Gec Alsthom Sa Bogie with independently driven wheels for a railway vehicle
EP1247714A1 (en) * 2001-04-02 2002-10-09 Alstom Bogie for railway vehicles with variable gauge wheels
EP3650304A1 (en) * 2018-11-06 2020-05-13 ALSTOM Transport Technologies Bogie for rail vehicle

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FR3124472A1 (en) 2022-12-30
EP4112413B1 (en) 2023-11-01

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