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EP3650304B1 - Bogie for rail vehicle - Google Patents

Bogie for rail vehicle Download PDF

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Publication number
EP3650304B1
EP3650304B1 EP19206960.7A EP19206960A EP3650304B1 EP 3650304 B1 EP3650304 B1 EP 3650304B1 EP 19206960 A EP19206960 A EP 19206960A EP 3650304 B1 EP3650304 B1 EP 3650304B1
Authority
EP
European Patent Office
Prior art keywords
bogie
transverse direction
along
wheel
wheels
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.)
Active
Application number
EP19206960.7A
Other languages
German (de)
French (fr)
Other versions
EP3650304A1 (en
Inventor
Alain Rodet
Ludovic FAURE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Transport Technologies SAS
Original Assignee
Alstom Transport Technologies SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Transport Technologies SAS filed Critical Alstom Transport Technologies SAS
Publication of EP3650304A1 publication Critical patent/EP3650304A1/en
Application granted granted Critical
Publication of EP3650304B1 publication Critical patent/EP3650304B1/en
Active legal-status Critical Current
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Classifications

    • 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
    • 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • 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
    • B61C9/48—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension
    • B61C9/50—Transmission systems in or for locomotives or motor railcars with electric motor propulsion with motors supported on vehicle frames and driving axles, e.g. axle or nose suspension in bogies
    • 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
    • B61F3/02—Types of bogies with more than one axle
    • B61F3/04—Types of bogies with more than one axle with driven axles or wheels
    • 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
    • B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
    • 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
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/50—Other details
    • B61F5/52—Bogie frames

Definitions

  • the present invention relates to a bogie for a rail vehicle with a lowered floor.
  • the invention also relates to a railway vehicle comprising such a bogie.
  • Such a bogie is for example known from the document EP 0 465 346 A1 .
  • a rail vehicle and in particular in a rail vehicle intended for intra-urban transport such as, for example, trams, it is desirable to limit the size of the bogies in order to increase the internal space accessible to passengers in the cars, while at the same time keeping a small footprint of the rail vehicle on the track.
  • the reduction in the size of the bogies under the body makes it possible to keep a lowered floor, that is to say extending substantially at the same level over the entire surface of the rail vehicle and fairly close to the ground. This facilitates the movement of travelers between the cars and access to the vehicle from the outside, in particular for travelers having difficulty moving, while maximizing the number of seats installed to the right of the bogie.
  • the free volume under the body is particularly important in the case of rotary bogies, that is to say when the body is mobile in rotation relative to the bogie.
  • the space required to allow such rotation while maintaining a lowered floor is a heavy constraint on the design of the bogies.
  • the subject of the invention is a bogie according to claim 1.
  • Such a bogie makes it possible to have a rail vehicle comprising an integral lowered floor, while maintaining an acceptable size on the track, in particular as regards the lateral size since all the masses are not placed outside the vehicle. space defined between the wheels.
  • the invention also relates to a railway vehicle comprising at least one bogie as described above, and at least one vehicle body carried by the bogie, the body comprising at least twelve seats arranged to the right of the bogie on the same floor, the body also comprising a lowered floor, extending substantially at the same level over the entire floor.
  • the figures 1 and 2 show a bogie 10 of a rail vehicle according to a first embodiment of the invention, intended to equip a rail vehicle.
  • a longitudinal direction XX ' is defined according to the ordinary direction of movement of the rail vehicle, a transverse direction YY' orthogonal to the longitudinal direction X-X ', extending in a horizontal plane in an ordinary operation of the vehicle rail, and a direction of elevation ZZ 'substantially orthogonal to the transverse direction YY' and to the longitudinal direction X-X '.
  • the bogie 10 is suitable for being installed on a fully lowered floor rail vehicle.
  • the rail vehicle comprises at least one car, each car comprising a body defining a floor, and that each floor extends substantially at the same level in the direction of elevation Z-Z ', including to the right. of the bogie 10.
  • the rail vehicle comprises a large number of seats located in line with the bogie, in particular at least twelve seats on the same floor in front of the bogie, thanks to the integral lowered floor.
  • the floor extends for example at a height substantially between 350 and 380 mm from the ground, the height being measured in the direction of elevation.
  • the bogie 10 is a fixed bogie, that is to say a bogie intended to support the body of the rail vehicle without allowing movement. of significant relative rotation (that is to say of greater than 2 ° amplitude) of the body with respect to the bogie 10 about an axis of rotation substantially parallel to the direction of elevation Z-Z '.
  • the bogie 10 comprises a bogie frame 12, as well as four wheels 14, four motors 16 and four reducers 18.
  • Each motor 16 is associated with a single one of the wheels 14 and with a single one of the reducers 18, so that each motor 16 drives in rotation only the wheel 14 which is associated with it by means of the corresponding reducer 18.
  • Each wheel 14 is thus mechanically independent from the other wheels 14.
  • the bogie 10 further comprises two end parts 24 located on both sides of the frame 12 in the longitudinal direction X-X ', and two fifth wheels 26 located on both sides of the frame 12 in the transverse direction Y-Y'.
  • the frame 12 also called the frame, comprises two cross members 30 and two side members 32 assembled at their respective ends by corner pieces 33 to form a rectangle extending in a plane substantially orthogonal to the direction of 'Z-Z elevation'.
  • the cross members 30 and the side members 32 are for example metal beams of elongated shape, extending respectively substantially in the transverse direction Y-Y ′ and in the longitudinal direction X-X ′.
  • the cross members 30 and the side members 32 have an I-shaped section in a plane orthogonal to their direction of elongation. By this is meant that their section in this plane has a shape comprising a main section extending in the direction of elevation ZZ 'and two transverse sections connected to the ends of the main section in their respective midpoints, the transverse sections being orthogonal to the main section.
  • the crosspieces 30 and the side members 32 have an L-shaped, T-shaped, Z-shaped section, or another shape giving them suitable torsional resistance.
  • the end parts 24 are connected to the frame 12 by means of two respective primary suspension systems 31 and two respective joints 35.
  • the joints are in particular pivot connections, so that the end part 24 is movable relative to the frame 12 in the direction of elevation Z-Z '.
  • the primary suspension system 31 is thus adapted to allow a deflection of the axle boxes 34 relative to the chassis 12 only in an elevation direction, which makes it possible to keep a small footprint of the system. primary suspension 31.
  • the travel of the primary suspension system restricted to movement in the direction of elevation ZZ ' is supplemented by the flexibility of the chassis 12, conferred by the shape of the cross members 30 and the side members 32.
  • Each end part 24 comprises two axle boxes 34 fixed together by an end cross member 36.
  • Each end part 24 carries two of the wheels 14, mounted on respective wheel hubs 38 contained in the boxes of wheels. axles 34, as shown in figure 2 .
  • the axle boxes 34 are metal housings having a substantially parallelepipedal shape, and comprising a bevelled side face on the inside in the transverse direction Y-Y '.
  • Each axle box 34 contains one of the hubs 38 as well as the reduction gear 18, which mechanically drives the hub 38 under the action of the associated motor 16.
  • the end cross members 36 are metal beams of elongated shape, extending substantially parallel to the transverse direction Y-Y ', and advantageously having an I-section as defined above.
  • Each hub 38 is rotatably mounted in the respective axle box 34, around an axis of rotation substantially parallel in the transverse direction Y-Y ', and carries a single wheel 14.
  • Each wheel 14 is thus mobile in rotation with respect to to the frame 12, around the respective axis of rotation extending in the transverse direction Y-Y '.
  • the end cross members 36 extend below the axes of rotation of the hubs 38 in the direction of elevation Z-Z '.
  • the use of independent hubs 38 for the four wheels 14 frees up the space located above the end cross members 36 and increases the free volume to the right of the bogie 10.
  • each fifth wheel 26 is connected to the frame 12 by a respective articulated arm 39A.
  • the fifth wheel 26 further comprises a respective secondary suspension system adapted to connect the fifth wheel 26 to a rail vehicle body carried by the bogie 10.
  • Each secondary suspension system comprises a shock absorber 39B and two groups of springs 39C, each connecting the body to the fifth wheel 26.
  • Each motor 16, carried by a corner of the frame 12, is an electric motor and comprises, in a known manner, a shaft carrying a rotor mounted movably in rotation in a stator carried by a stator casing, the rotation of the shaft taking place on at least one rotation step.
  • the shaft is thus movable in rotation relative to the frame 12 about an axis of rotation extending in the transverse direction Y-Y '.
  • the shaft connects an output of the motor 16 to an input of the reducer 18, via a coupling 49, and transmits the torque generated by the motor 16 to the reducer 18 and finally to the wheel 14.
  • the wheels 14 define between them a space E, shown in the figures 1 and 2 , the space E extending between the planes of the wheels 14 in the transverse direction Y-Y '.
  • the motors 16 are arranged externally with respect to the wheels 14 in the transverse direction Y-Y '. That is to say that each motor 16 is located in a half space extending on the side opposite to the frame 12 with respect to the plane of the wheel 14 associated with the motor 16. The motors 16 are thus arranged outside of the frame. the space defined by the wheels 14 in the transverse direction Y-Y '.
  • the reducers 18 are positioned internally with respect to the wheels 14 in the transverse direction Y-Y '. That is to say that each reducer 18 is located in a half space extending on the same side as the frame 12 with respect to the plane of the wheel 14 associated with the reducer 18. The reducers 18 are thus placed inside. of the space defined by the wheels 14 in the transverse direction Y-Y '.
  • Each reducer 18 is arranged to transmit the rotation of one of the motors 16 to one of the hubs 38 carrying one of the wheels 14.
  • the reducer 18 comprises for example a first gear cooperating on one side with a second gear connected to the coupling 49 , and on the other side with a third gear connected to hub 38.
  • the reduction gear 18 allows, in addition to adjusting the transmission ratio between the motor 16 and the wheel 14, to transmit the torque from the motor 16 to the wheel 14 without aligning the axes of the hub 38 and of the motor shaft 16 according to the transverse direction Y-Y '.
  • the motor 16 and the wheel 14 are offset in the longitudinal direction X-X ', which reduces the lateral size of the bogie 10.
  • the bogie 10 advantageously comprises four braking devices 60, each braking device 60 being adapted to block the rotation of one of the respective wheels 14.
  • each brake device 60 comprises a brake caliper 62 and two brake pads 64 carried by two members of the brake caliper 62.
  • the brake device 60 is adapted to clamp the brake pads 64 against opposite sides of the brake.
  • a brake disc 66 integral with the wheel 14, via the brake caliper 62, to block the rotation of the wheel 14.
  • Each braking device 60 is disposed entirely below the motor 16 associated with the respective wheel 14 with the braking device 60. That is to say that the brake caliper 62 and the brake pads 64 are located in the half. space located under the motor 16 in the direction of elevation Z-Z '.
  • a second embodiment is shown in figure 3 .
  • the bogie 10 according to the second embodiment differs from the first embodiment by the points described below.
  • the bogie 10 is a pivoting bogie.
  • This is understood to mean that the bogie 10 is adapted to allow a relative rotational movement between the frame 12 and the rail vehicle body, around a vertical axis of rotation substantially parallel to the direction of elevation Z-Z ', a maximum amplitude of this relative rotational movement being for example greater than 12 °.
  • the presence of bevelled side faces on the axle boxes 34 improves the amplitude of the rotation of the body.
  • the bogie 10 comprises a load cross member 80 connected to the frame 12 by the secondary suspension system, and carrying a ball crown 82 adapted to be fixed to the body of a railway vehicle in a movable manner in rotation about an axis of rotation s 'extending along the direction of elevation ZZ'
  • the load cross member 80 extends above the frame 12, in the transverse direction Y-Y '.
  • the load cross member 80 comprises a central part 84 which carries the ball ring 82, two lateral parts 88 extending the central part 84 outwardly in the transverse direction Y-Y ', and two ends 90 extending outwardly relative to the intermediate parts. 88 respective in the transverse direction Y-Y '.
  • the central part 84 extends internally with respect to the wheels 14 and to the side members 32, in the transverse direction Y-Y ', that is to say in the space defined by the wheels 14.
  • the end portions 90 extend outside the space defined by the wheels 14.
  • the load cross member 80 is supported on the springs 39C of the secondary suspension system at the ends 90.
  • the central part 84 extends lower than the ends 90 in the direction of elevation Z-Z ', so that A height of the ball crown 82 is partially compensated by the lowering of the central part 84. This makes it possible to reduce the bulk associated with the ball crown 82.
  • the load cross member 80 has a thickness e 1 measured in the direction of elevation ZZ 'at the level of the central part 84, greater than a thickness e 2 at the level of the side parts 88. This makes it possible to reduce the bulk. associated with the load cross member 80 at the level of the side parts 88 and the ends 90, that is to say above the frame 12, where space is crucial, and above the springs 39C, while maintaining a sufficient thickness in the central part, at the level of the ball ring 82 carrying the body.
  • the bogie 10 makes it possible to have a rail vehicle comprising an integral lowered floor, while maintaining a sufficiently small footprint on the track, in particular as regards the lateral or transverse size.
  • the motors 16 and the axle boxes 34 are arranged externally, so as to leave a maximum free volume in line with the bogie to allow the full lowered floor.
  • the arrangement of the motors 16, the wheels 14 and the axle boxes 34, offset in the longitudinal direction X-X ' makes it possible to minimize the lateral bulk under the body compared to a direct transmission system, for example. .
  • the large free volume to the right of the bogie 10 also makes it possible to use the same structure of the bogie 10 for pivoting and non-pivoting applications, the free volume allowing sufficient amplitude of rotation of the body above the bogie 10 between the axle boxes 34.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vehicle Body Suspensions (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Platform Screen Doors And Railroad Systems (AREA)

Description

La présente invention concerne un bogie pour véhicule ferroviaire à plancher abaissé.The present invention relates to a bogie for a rail vehicle with a lowered floor.

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

Un tel bogie est par exemple connu du document EP 0 465 346 A1 .Such a bogie is for example known from the document EP 0 465 346 A1 .

Dans un véhicule ferroviaire, et notamment dans un véhicule ferroviaire destiné au transport intra-urbain comme par exemple les tramways, il est souhaitable de limiter l'encombrement des bogies afin d'augmenter l'espace interne accessible aux voyageurs dans les voitures, tout en conservant un encombrement faible du véhicule ferroviaire sur la voie.In a rail vehicle, and in particular in a rail vehicle intended for intra-urban transport such as, for example, trams, it is desirable to limit the size of the bogies in order to increase the internal space accessible to passengers in the cars, while at the same time keeping a small footprint of the rail vehicle on the track.

La réduction de l'encombrement des bogies sous la caisse permet de conserver un plancher abaissé, c'est-à-dire s'étendant sensiblement au même niveau sur toute la surface du véhicule ferroviaire et assez proche du sol. Cela facilite la circulation des voyageurs entre les voitures et l'accès au véhicule depuis l'extérieur, notamment pour les voyageurs ayant des difficultés à se déplacer, tout en maximisant le nombre de sièges installés au droit du bogie.The reduction in the size of the bogies under the body makes it possible to keep a lowered floor, that is to say extending substantially at the same level over the entire surface of the rail vehicle and fairly close to the ground. This facilitates the movement of travelers between the cars and access to the vehicle from the outside, in particular for travelers having difficulty moving, while maximizing the number of seats installed to the right of the bogie.

Le volume libre sous la caisse est particulièrement important dans le cas des bogies rotatifs, c'est-à-dire quand la caisse est mobile en rotation par rapport au bogie. L'espace nécessaire pour permettre une telle rotation tout en conservant un plancher abaissé est une contrainte lourde pour la conception des bogies.The free volume under the body is particularly important in the case of rotary bogies, that is to say when the body is mobile in rotation relative to the bogie. The space required to allow such rotation while maintaining a lowered floor is a heavy constraint on the design of the bogies.

Cependant, réduire l'encombrement du bogie sous la caisse en déplaçant toutes les masses latéralement par rapport aux voitures augmente fortement la largeur du véhicule ferroviaire et le gabarit du bogie, ce qui n'est pas satisfaisant pour des véhicules circulant en surface en milieu urbain.However, reducing the size of the bogie under the body by moving all the masses laterally relative to the cars greatly increases the width of the rail vehicle and the size of the bogie, which is not satisfactory for vehicles traveling on the surface in an urban environment. .

Il est donc souhaitable de fournir un bogie de véhicule ferroviaire permettant d'avoir un plancher abaissé intégral, tout en conservant un encombrement transverse suffisamment faible du véhicule ferroviaire.It is therefore desirable to provide a rail vehicle bogie making it possible to have an integral lowered floor, while maintaining a sufficiently small transverse bulk of the rail vehicle.

Ainsi, l'invention a pour objet un bogie selon la revendication 1.Thus, the subject of the invention is a bogie according to claim 1.

Un tel bogie permet d'avoir un véhicule ferroviaire comprenant un plancher abaissé intégral, tout en maintenant un encombrement sur la voie acceptable, notamment en ce qui concerne l'encombrement latéral puisque toutes les masses ne sont pas placées à l'extérieur de l'espace défini entre les roues.Such a bogie makes it possible to have a rail vehicle comprising an integral lowered floor, while maintaining an acceptable size on the track, in particular as regards the lateral size since all the masses are not placed outside the vehicle. space defined between the wheels.

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 :

  • chaque moteur est décalé par rapport à la roue associée, selon une direction longitudinale orthogonale à la direction transversale ;
  • chaque roue est montée sur un moyeu respectif contenu dans une boite d'essieu, le réducteur associé à la roue étant également contenu dans la boite d'essieu ;
  • les boites d'essieu sont fixées entre elles deux à deux par des traverses d'extrémité s'étendant sensiblement selon la direction transversale ;
  • les boites d'essieu sont fixées au châssis par des dispositifs de suspension primaire, chaque dispositif de suspension primaire étant agencé pour permettre un débattement des boites d'essieu par rapport au châssis uniquement selon une direction d'élévation sensiblement perpendiculaire à la direction transversale ;
  • chaque moteur comprend un arbre mobile en rotation par rapport au châssis selon un axe de rotation respectif parallèle à la direction transversale, ledit arbre reliant une sortie du moteur à une entrée d'un réducteur correspondant ;
  • le bogie est un bogie pivotant comprenant une traverse de charge comprenant une couronne à billes articulée de façon mobile en rotation autour d'un axe de rotation s'étendant selon une direction d'élévation sensiblement perpendiculaire à la direction transversale, la couronne à billes étant destinée à supporter une caisse de véhicule ferroviaire ;
  • la traverse de charge comprend une partie centrale s'étendant dans l'espace selon la direction transversale et deux parties latérales prolongeant la partie centrale à l'extérieur de l'espace selon la direction transversale, la partie centrale présentant une épaisseur, mesurée selon une direction d'élévation sensiblement perpendiculaire à la direction transversale, supérieure à une épaisseur des parties latérales mesurée selon la direction d'élévation ; et
  • le bogie comprend quatre dispositifs de freinage associé aux roues, chaque dispositif de freinage comprenant un étrier de frein agencé pour freiner la rotation de la roue respective, l'étrier de frein étant entièrement disposé en dessous du moteur entraînant la roue selon une direction d'élévation sensiblement perpendiculaire à la direction transversale.
According to particular embodiments of the invention, the bogie has one or more of the following characteristics, taken independently or in any technically feasible combination:
  • each motor is offset with respect to the associated wheel, in a longitudinal direction orthogonal to the transverse direction;
  • each wheel is mounted on a respective hub contained in an axle box, the reduction gear associated with the wheel also being contained in the axle box;
  • the axle boxes are fixed to one another in pairs by end cross members extending substantially in the transverse direction;
  • the axle boxes are fixed to the frame by primary suspension devices, each primary suspension device being arranged to allow a displacement of the axle boxes relative to the frame only in a direction of elevation substantially perpendicular to the transverse direction;
  • each motor comprises a movable shaft in rotation with respect to the frame along a respective axis of rotation parallel to the transverse direction, said shaft connecting an output of the motor to an input of a corresponding reduction gear;
  • the bogie is a pivoting bogie comprising a load cross member comprising a ball ring articulated in a movable manner in rotation about an axis of rotation extending in a direction of elevation substantially perpendicular to the transverse direction, the ball ring being intended to support a rail vehicle body;
  • the load cross member comprises a central part extending in space in the transverse direction and two side parts extending the central part outside the space in the transverse direction, the central part having a thickness, measured according to a direction of elevation substantially perpendicular to the transverse direction, greater than a thickness of the side portions measured along the direction of elevation; and
  • the bogie comprises four braking devices associated with the wheels, each braking device comprising a brake caliper arranged to brake the rotation of the respective wheel, the brake caliper being entirely disposed below the motor driving the wheel in a direction of elevation substantially perpendicular to the transverse direction.

L'invention concerne également un véhicule ferroviaire comprenant au moins un bogie tel que décrit plus haut, et au moins une caisse de véhicule portée par le bogie, la caisse comprenant au moins douze sièges disposés au droit du bogie sur un même étage, la caisse comprenant également un plancher abaissé, s'étendant sensiblement au même niveau sur tout l'étage.The invention also relates to a railway vehicle comprising at least one bogie as described above, and at least one vehicle body carried by the bogie, the body comprising at least twelve seats arranged to the right of the bogie on the same floor, the body also comprising a lowered floor, extending substantially at the same level over the entire 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 selon un premier mode de réalisation de l'invention ;
  • la figure 2 est une vue en coupe transversale selon l'axe II-II du bogie de la figure 1 ; et
  • la figure 3 est une vue en perspective d'un bogie selon un autre mode de réalisation de l'invention.
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 according to a first embodiment of the invention;
  • the figure 2 is a cross-sectional view along axis II-II of the bogie of the figure 1 ; and
  • the figure 3 is a perspective view of a bogie according to another embodiment of the invention.

Les figures 1 et 2 représentent un bogie 10 de véhicule ferroviaire selon un premier mode de réalisation de l'invention, destiné à équiper un véhicule ferroviaire.The figures 1 and 2 show a bogie 10 of a rail vehicle according to a first embodiment of the invention, intended to equip a rail vehicle.

Dans ce qui suit, on définit une direction longitudinale X-X' selon la direction de circulation ordinaire du véhicule ferroviaire, 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, a longitudinal direction XX 'is defined according to the ordinary direction of movement of the rail vehicle, a transverse direction YY' orthogonal to the longitudinal direction X-X ', extending in a horizontal plane in an ordinary operation of the vehicle rail, and a direction of elevation ZZ 'substantially orthogonal to the transverse direction YY' and to the longitudinal direction X-X '.

Le bogie 10 est adapté pour être installé sur un véhicule ferroviaire à plancher abaissé intégral. Par cela, on entend que le véhicule ferroviaire comprend au moins une voiture, chaque voiture comprenant une caisse définissant un plancher, et que chaque plancher s'étend sensiblement au même niveau selon la direction d'élévation Z-Z', y compris au droit du bogie 10. Ainsi, le véhicule ferroviaire comprend un grand nombre de sièges situés au droit du bogie, notamment au moins douze sièges sur un même étage au droit du bogie, grâce au plancher abaissé intégral. Le plancher s'étend par exemple à une hauteur sensiblement comprise entre 350 et 380 mm du sol, la hauteur étant mesurée selon la direction d'élévation.The bogie 10 is suitable for being installed on a fully lowered floor rail vehicle. By this is meant that the rail vehicle comprises at least one car, each car comprising a body defining a floor, and that each floor extends substantially at the same level in the direction of elevation Z-Z ', including to the right. of the bogie 10. Thus, the rail vehicle comprises a large number of seats located in line with the bogie, in particular at least twelve seats on the same floor in front of the bogie, thanks to the integral lowered floor. The floor extends for example at a height substantially between 350 and 380 mm from the ground, the height being measured in the direction of elevation.

Selon ce premier mode de réalisation, le bogie 10 est un bogie fixe, c'est-à-dire un bogie destiné à supporter la caisse du véhicule ferroviaire sans permettre de mouvement de rotation relatif significatif (c'est-à-dire d'amplitude supérieure à 2°) de la caisse par rapport au bogie 10 autour d'un axe de rotation sensiblement parallèle à la direction d'élévation Z-Z'.According to this first embodiment, the bogie 10 is a fixed bogie, that is to say a bogie intended to support the body of the rail vehicle without allowing movement. of significant relative rotation (that is to say of greater than 2 ° amplitude) of the body with respect to the bogie 10 about an axis of rotation substantially parallel to the direction of elevation Z-Z '.

Le bogie 10 comprend un châssis 12 de bogie, ainsi que quatre roues 14, quatre moteurs 16 et quatre réducteurs 18.The bogie 10 comprises a bogie frame 12, as well as four wheels 14, four motors 16 and four reducers 18.

Chaque moteur 16 est associé à une unique des roues 14 et à un unique des réducteurs 18, de sorte que chaque moteur 16 entraîne en rotation uniquement la roue 14 qui lui est associée par l'intermédiaire du réducteur 18 correspondant. Chaque roue 14 est ainsi mécaniquement indépendante des autres roues 14.Each motor 16 is associated with a single one of the wheels 14 and with a single one of the reducers 18, so that each motor 16 drives in rotation only the wheel 14 which is associated with it by means of the corresponding reducer 18. Each wheel 14 is thus mechanically independent from the other wheels 14.

Le bogie 10 comprend de plus deux parties d'extrémité 24 situées des deux côtés du châssis 12 selon la direction longitudinale X-X', et deux sellettes 26 situées des deux côtés du châssis 12 selon la direction transversale Y-Y'.The bogie 10 further comprises two end parts 24 located on both sides of the frame 12 in the longitudinal direction X-X ', and two fifth wheels 26 located on both sides of the frame 12 in the transverse direction Y-Y'.

Selon un mode de réalisation, le châssis 12, également appelé cadre, comprend deux traverses 30 et deux longerons 32 assemblés à leurs extrémités respectives par des pièces d'angle 33 pour former un rectangle s'étendant dans un plan sensiblement orthogonal à la direction d'élévation Z-Z'.According to one embodiment, the frame 12, also called the frame, comprises two cross members 30 and two side members 32 assembled at their respective ends by corner pieces 33 to form a rectangle extending in a plane substantially orthogonal to the direction of 'Z-Z elevation'.

Les traverses 30 et les longerons 32 sont par exemple des poutres métalliques de forme allongée, s'étendant respectivement sensiblement selon la direction transversale Y-Y' et selon la direction longitudinale X-X'.The cross members 30 and the side members 32 are for example metal beams of elongated shape, extending respectively substantially in the transverse direction Y-Y ′ and in the longitudinal direction X-X ′.

Les traverses 30 et les longerons 32 présentent une section en forme de I dans un plan orthogonal à leur direction d'allongement. Par cela, on entend que leur section dans ce plan présente une forme comportant un tronçon principal s'étendant selon la direction d'élévation Z-Z' et deux tronçons transverses reliés aux extrémités du tronçon principal en leur milieux respectifs, les tronçons transverses étant orthogonaux au tronçon principal.The cross members 30 and the side members 32 have an I-shaped section in a plane orthogonal to their direction of elongation. By this is meant that their section in this plane has a shape comprising a main section extending in the direction of elevation ZZ 'and two transverse sections connected to the ends of the main section in their respective midpoints, the transverse sections being orthogonal to the main section.

Une telle forme de la section des traverses 30 et des longerons 32 leur confère une plus faible résistance en torsion, ce qui augmente la flexibilité du châssis 12.Such a shape of the cross section of the cross members 30 and of the side members 32 gives them a lower torsional resistance, which increases the flexibility of the frame 12.

En variante, les traverses 30 et les longerons 32 présentent une section en forme de L, en forme de T, en forme de Z, ou une autre forme leur conférant une résistance en torsion adaptée.As a variant, the crosspieces 30 and the side members 32 have an L-shaped, T-shaped, Z-shaped section, or another shape giving them suitable torsional resistance.

Les parties d'extrémité 24 sont reliées au châssis 12 au moyen de deux systèmes de suspension primaire 31 respectifs et de deux articulations 35 respectives. Les articulations sont notamment des liaisons pivot, de sorte que la partie d'extrémité 24 est mobile par rapport au châssis 12 selon la direction d'élévation Z-Z'.The end parts 24 are connected to the frame 12 by means of two respective primary suspension systems 31 and two respective joints 35. The joints are in particular pivot connections, so that the end part 24 is movable relative to the frame 12 in the direction of elevation Z-Z '.

Le système de suspension primaire 31 est ainsi adapté pour permettre un débattement des boites d'essieu 34 par rapport au châssis 12 uniquement selon une direction d'élévation, ce qui permet de conserver un encombrement réduit du système de suspension primaire 31. Le débattement du système de suspension primaire restreint à un mouvement selon la direction d'élévation Z-Z' est complété par la flexibilité du châssis 12, conférée par la forme des traverses 30 et des longerons 32.The primary suspension system 31 is thus adapted to allow a deflection of the axle boxes 34 relative to the chassis 12 only in an elevation direction, which makes it possible to keep a small footprint of the system. primary suspension 31. The travel of the primary suspension system restricted to movement in the direction of elevation ZZ 'is supplemented by the flexibility of the chassis 12, conferred by the shape of the cross members 30 and the side members 32.

Chaque partie d'extrémité 24 comprend deux boites d'essieu 34 fixées entre elles par une traverse d'extrémité 36. Chaque partie d'extrémité 24 porte deux des roues 14, montées sur des moyeux 38 de roue respectifs contenus dans les boites d'essieux 34, comme représenté sur la figure 2.Each end part 24 comprises two axle boxes 34 fixed together by an end cross member 36. Each end part 24 carries two of the wheels 14, mounted on respective wheel hubs 38 contained in the boxes of wheels. axles 34, as shown in figure 2 .

Les boites d'essieu 34 sont des carters métalliques présentant une forme sensiblement parallélépipédique, et comprenant une face latérale biseautée du côté intérieur selon la direction transversale Y-Y'.The axle boxes 34 are metal housings having a substantially parallelepipedal shape, and comprising a bevelled side face on the inside in the transverse direction Y-Y '.

Chaque boite d'essieu 34 contient un des moyeux 38 ainsi que le réducteur 18, qui entraine mécaniquement le moyeu 38 sous l'action du moteur 16 associé.Each axle box 34 contains one of the hubs 38 as well as the reduction gear 18, which mechanically drives the hub 38 under the action of the associated motor 16.

Les traverses d'extrémité 36 sont des poutres métalliques de forme allongée, s'étendant sensiblement parallèlement à la direction transverse Y-Y', et présentant avantageusement une section en I comme défini plus haut.The end cross members 36 are metal beams of elongated shape, extending substantially parallel to the transverse direction Y-Y ', and advantageously having an I-section as defined above.

Chaque moyeu 38 est monté rotatif dans la boite d'essieu 34 respective, autour d'un axe de rotation sensiblement parallèle selon la direction transversale Y-Y', et porte une unique roue 14. Chaque roue 14 est ainsi mobile en rotation par rapport au châssis 12, autour de l'axe de rotation respectif s'étendant selon la direction transversale Y-Y'.Each hub 38 is rotatably mounted in the respective axle box 34, around an axis of rotation substantially parallel in the transverse direction Y-Y ', and carries a single wheel 14. Each wheel 14 is thus mobile in rotation with respect to to the frame 12, around the respective axis of rotation extending in the transverse direction Y-Y '.

Les traverses d'extrémité 36 s'étendent en-dessous des axes de rotation des moyeux 38 selon la direction d'élévation Z-Z'. L'utilisation de moyeux 38 indépendants pour les quatre roues 14 permet de libérer l'espace situé au-dessus des traverses d'extrémité 36 et augmente le volume libre au droit du bogie 10.The end cross members 36 extend below the axes of rotation of the hubs 38 in the direction of elevation Z-Z '. The use of independent hubs 38 for the four wheels 14 frees up the space located above the end cross members 36 and increases the free volume to the right of the bogie 10.

Comme représenté sur la figure 1, chaque sellette 26 est reliée au châssis 12 par un bras articulé respectif 39A. La sellette 26 comprend de plus un système de suspension secondaire respectif adapté pour relier la sellette 26 à une caisse de véhicule ferroviaire portée par le bogie 10.As shown on figure 1 , each fifth wheel 26 is connected to the frame 12 by a respective articulated arm 39A. The fifth wheel 26 further comprises a respective secondary suspension system adapted to connect the fifth wheel 26 to a rail vehicle body carried by the bogie 10.

Chaque système de suspension secondaire comprend un amortisseur 39B et deux groupes de ressorts 39C, reliant chacun la caisse à la sellette 26.Each secondary suspension system comprises a shock absorber 39B and two groups of springs 39C, each connecting the body to the fifth wheel 26.

Chaque moteur 16, porté par un coin du châssis 12, est un moteur électrique et comprend, de façon connue, un arbre portant un rotor monté mobile en rotation dans un stator porté par une carcasse de stator la rotation de l'arbre ayant lieu sur au moins un pallier de rotation.Each motor 16, carried by a corner of the frame 12, is an electric motor and comprises, in a known manner, a shaft carrying a rotor mounted movably in rotation in a stator carried by a stator casing, the rotation of the shaft taking place on at least one rotation step.

L'arbre est ainsi mobile en rotation par rapport au châssis 12 autour d'un axe de rotation s'étendant selon la direction transversale Y-Y'.The shaft is thus movable in rotation relative to the frame 12 about an axis of rotation extending in the transverse direction Y-Y '.

L'arbre relie une sortie du moteur 16 à une entrée du réducteur 18, via un accouplement 49, et transmet le couple généré par le moteur 16 au réducteur 18 et finalement à la roue 14.The shaft connects an output of the motor 16 to an input of the reducer 18, via a coupling 49, and transmits the torque generated by the motor 16 to the reducer 18 and finally to the wheel 14.

Les roues 14 définissent entre elles un espace E, représenté sur les figures 1 et 2, l'espace E s'étendant entre les plans des roues 14 selon la direction transversale Y-Y'.The wheels 14 define between them a space E, shown in the figures 1 and 2 , the space E extending between the planes of the wheels 14 in the transverse direction Y-Y '.

Les moteurs 16 sont disposés extérieurement par rapport aux roues 14 selon la direction transversale Y-Y'. C'est-à-dire que chaque moteur 16 est situé dans un demi espace s'étendant du côté opposé au châssis 12 par rapport au plan de la roue 14 associée au moteur 16. Les moteurs 16 sont ainsi disposés à l'extérieur de l'espace défini par les roues 14 selon la direction transversale Y-Y'.The motors 16 are arranged externally with respect to the wheels 14 in the transverse direction Y-Y '. That is to say that each motor 16 is located in a half space extending on the side opposite to the frame 12 with respect to the plane of the wheel 14 associated with the motor 16. The motors 16 are thus arranged outside of the frame. the space defined by the wheels 14 in the transverse direction Y-Y '.

Les réducteurs 18 sont positionnés intérieurement par rapport aux roues 14 selon la direction transversale Y-Y'. C'est-à-dire que chaque réducteur 18 est situé dans un demi espace s'étendant du même côté que le châssis 12 par rapport au plan de la roue 14 associée au réducteur 18. Les réducteurs 18 sont ainsi disposés à l'intérieur de l'espace défini par les roues 14 selon la direction transversale Y-Y'.The reducers 18 are positioned internally with respect to the wheels 14 in the transverse direction Y-Y '. That is to say that each reducer 18 is located in a half space extending on the same side as the frame 12 with respect to the plane of the wheel 14 associated with the reducer 18. The reducers 18 are thus placed inside. of the space defined by the wheels 14 in the transverse direction Y-Y '.

Chaque réducteur 18 est agencé pour transmettre la rotation d'un des moteurs 16 à un des moyeux 38 portant une des roues 14. Le réducteur 18 comprend par exemple un premier engrenage coopérant d'un côté avec un deuxième engrenage relié à l'accouplement 49, et de l'autre côté avec un troisième engrenage relié au moyeu 38.Each reducer 18 is arranged to transmit the rotation of one of the motors 16 to one of the hubs 38 carrying one of the wheels 14. The reducer 18 comprises for example a first gear cooperating on one side with a second gear connected to the coupling 49 , and on the other side with a third gear connected to hub 38.

Le réducteur 18 permet, en plus d'ajuster le rapport de transmission entre le moteur 16 et la roue 14, de transmettre le couple du moteur 16 à la roue 14 sans aligner les axes du moyeu 38 et de l'arbre du moteur 16 selon la direction transversale Y-Y'. Ainsi, le moteur 16 et la roue 14 sont décalés selon la direction longitudinale X-X', ce qui réduit l'encombrement latéral du bogie 10.The reduction gear 18 allows, in addition to adjusting the transmission ratio between the motor 16 and the wheel 14, to transmit the torque from the motor 16 to the wheel 14 without aligning the axes of the hub 38 and of the motor shaft 16 according to the transverse direction Y-Y '. Thus, the motor 16 and the wheel 14 are offset in the longitudinal direction X-X ', which reduces the lateral size of the bogie 10.

Le bogie 10 comprend avantageusement quatre dispositifs de freinage 60, chaque dispositif de freinage 60 étant adapté pour bloquer la rotation d'une des roues 14 respective.The bogie 10 advantageously comprises four braking devices 60, each braking device 60 being adapted to block the rotation of one of the respective wheels 14.

Comme représenté sur la figure 1, chaque dispositif de freinage 60 comprend un étrier de frein 62 et deux plaquettes de frein 64 portées par deux membres de l'étrier de frein 62. Le dispositif de freinage 60 est propre à serrer les plaquettes de frein 64 contre des côtés opposés d'un disque de frein 66, solidaire de la roue 14, par l'intermédiaire de l'étrier de frein 62, pour bloquer la rotation de la roue 14.As shown on figure 1 , each brake device 60 comprises a brake caliper 62 and two brake pads 64 carried by two members of the brake caliper 62. The brake device 60 is adapted to clamp the brake pads 64 against opposite sides of the brake. a brake disc 66, integral with the wheel 14, via the brake caliper 62, to block the rotation of the wheel 14.

Chaque dispositif de freinage 60 est disposé entièrement en dessous du moteur 16 associé à la roue 14 respective au dispositif de freinage 60. C'est-à-dire que l'étrier de freinage 62 et les plaquette de frein 64 se trouvent dans le demi espace situé sous le moteur 16 selon la direction d'élévation Z-Z'.Each braking device 60 is disposed entirely below the motor 16 associated with the respective wheel 14 with the braking device 60. That is to say that the brake caliper 62 and the brake pads 64 are located in the half. space located under the motor 16 in the direction of elevation Z-Z '.

Un deuxième mode de réalisation est représenté sur la figure 3. Le bogie 10 selon le deuxième mode de réalisation diffère du premier mode de réalisation par les points décrits ci-dessous.A second embodiment is shown in figure 3 . The bogie 10 according to the second embodiment differs from the first embodiment by the points described below.

Selon ce deuxième mode de réalisation, le bogie 10 est un bogie pivotant. On entend par là que le bogie 10 est adapté pour permettre un mouvement relatif de rotation entre le châssis 12 et la caisse de véhicule ferroviaire, autour d'un axe de rotation vertical sensiblement parallèle à la direction d'élévation Z-Z', une amplitude maximale de ce mouvement relatif de rotation étant par exemple supérieure à 12°. La présence de faces latérales biseautées sur les boites d'essieu 34 permet d'améliorer l'amplitude de la rotation de la caisse.According to this second embodiment, the bogie 10 is a pivoting bogie. This is understood to mean that the bogie 10 is adapted to allow a relative rotational movement between the frame 12 and the rail vehicle body, around a vertical axis of rotation substantially parallel to the direction of elevation Z-Z ', a maximum amplitude of this relative rotational movement being for example greater than 12 °. The presence of bevelled side faces on the axle boxes 34 improves the amplitude of the rotation of the body.

Le bogie 10 comprend une traverse de charge 80 reliée au châssis 12 par le système de suspension secondaire, et portant une couronne à billes 82 adaptée pour être fixée à la caisse de véhicule ferroviaire de façon mobile en rotation autour d'un axe de rotation s'étendant selon la direction d'élévation Z-Z'The bogie 10 comprises a load cross member 80 connected to the frame 12 by the secondary suspension system, and carrying a ball crown 82 adapted to be fixed to the body of a railway vehicle in a movable manner in rotation about an axis of rotation s 'extending along the direction of elevation ZZ'

La traverse de charge 80 s'étend au-dessus du châssis 12, selon la direction transversale Y-Y'.The load cross member 80 extends above the frame 12, in the transverse direction Y-Y '.

La traverse de charge 80 comporte une partie centrale 84 qui porte la couronne à billes 82, deux parties latérales 88 prolongeant la partie centrale 84 extérieurement selon la direction transversale Y-Y', et deux extrémités 90 s'étendant extérieurement par rapport aux parties intermédiaires 88 respectives selon la direction transversale Y-Y'.The load cross member 80 comprises a central part 84 which carries the ball ring 82, two lateral parts 88 extending the central part 84 outwardly in the transverse direction Y-Y ', and two ends 90 extending outwardly relative to the intermediate parts. 88 respective in the transverse direction Y-Y '.

La partie centrale 84 s'étend intérieurement par rapport aux roues 14 et aux longerons 32, selon la direction transversale Y-Y', c'est-à-dire dans l'espace défini par les roues 14.The central part 84 extends internally with respect to the wheels 14 and to the side members 32, in the transverse direction Y-Y ', that is to say in the space defined by the wheels 14.

Les parties d'extrémité 90 s'étendent à l'extérieur de l'espace défini par les roues 14.The end portions 90 extend outside the space defined by the wheels 14.

La traverse de charge 80 est en appui sur les ressorts 39C du système de suspension secondaire au niveau des extrémités 90. La partie centrale 84 s'étend plus bas que les extrémités 90 selon la direction d'élévation Z-Z', de sorte qu'une hauteur de la couronne à billes 82 est partiellement compensée par l'abaissement de la partie centrale 84. Ceci permet de réduire l'encombrement associé à la couronne à billes 82.The load cross member 80 is supported on the springs 39C of the secondary suspension system at the ends 90. The central part 84 extends lower than the ends 90 in the direction of elevation Z-Z ', so that A height of the ball crown 82 is partially compensated by the lowering of the central part 84. This makes it possible to reduce the bulk associated with the ball crown 82.

Comme visible sur la figure 3, la traverse de charge 80 présente une épaisseur e1 mesurée selon la direction d'élévation Z-Z' au niveau de la partie centrale 84, plus importante qu'une épaisseur e2 au niveau des parties latérales 88. Ceci permet de réduire l'encombrement associé à la traverse de charge 80 au niveau des parties latérales 88 et des extrémités 90, c'est-à-dire au-dessus du châssis 12, là où l'encombrement est crucial, et au-dessus des ressorts 39C, tout en conservant une épaisseur suffisante dans la partie centrale, au niveau de la couronne à billes 82 portant la caisse.As visible on the figure 3 , the load cross member 80 has a thickness e 1 measured in the direction of elevation ZZ 'at the level of the central part 84, greater than a thickness e 2 at the level of the side parts 88. This makes it possible to reduce the bulk. associated with the load cross member 80 at the level of the side parts 88 and the ends 90, that is to say above the frame 12, where space is crucial, and above the springs 39C, while maintaining a sufficient thickness in the central part, at the level of the ball ring 82 carrying the body.

Le bogie 10 permet d'avoir un véhicule ferroviaire comprenant un plancher abaissé intégral, tout en maintenant un encombrement sur la voie suffisamment faible, notamment en ce qui concerne l'encombrement latéral ou transversal. En effet, les moteurs 16 et les boites d'essieu 34 sont arrangés extérieurement, de façon à laisser un volume libre maximal au droit du bogie pour permettre le plancher abaissé intégral. Cependant, la disposition des moteurs 16, des roues 14 et des boites d'essieu 34, décalés selon la direction longitudinale X-X', permet de minimiser l'encombrement latéral sous la caisse par rapport à un système à transmission directe, par exemple.The bogie 10 makes it possible to have a rail vehicle comprising an integral lowered floor, while maintaining a sufficiently small footprint on the track, in particular as regards the lateral or transverse size. Indeed, the motors 16 and the axle boxes 34 are arranged externally, so as to leave a maximum free volume in line with the bogie to allow the full lowered floor. However, the arrangement of the motors 16, the wheels 14 and the axle boxes 34, offset in the longitudinal direction X-X ', makes it possible to minimize the lateral bulk under the body compared to a direct transmission system, for example. .

Le volume libre important au droit du bogie 10 permet de plus d'utiliser une même structure du bogie 10 pour des applications pivotantes et non-pivotantes, le volume libre permettant une amplitude de rotation suffisante de la caisse au-dessus du bogie 10 entre les boites d'essieu 34.The large free volume to the right of the bogie 10 also makes it possible to use the same structure of the bogie 10 for pivoting and non-pivoting applications, the free volume allowing sufficient amplitude of rotation of the body above the bogie 10 between the axle boxes 34.

Claims (10)

  1. A bogie (10) for a railway vehicle with a lowered floor comprising:
    - a bogie chassis (12); and
    - four wheels (14) mounted on the chassis (12), each wheel (14) being rotatable relative to the chassis (12) around a respective rotation axis extending along a same transverse direction (Y-Y'), said wheels (14) defining a space (E) between them, the space (E) extending between extended planes of the wheels (14) along the transverse direction (Y-Y'),
    the bogie (10) further comprises:
    - four motors (16) assembled on the chassis (12); and
    - four reduction gears (18), positioned inside the space (E) along the transverse direction (Y-Y'),
    each motor (16) being arranged to drive one of the wheels (14) by means of one of the reduction gears (18) associated with the wheel (14), each wheel (14) being mechanically independent from the other wheels (14),
    characterized in that the four motors (16) are positioned outside the space (E) along the transverse direction (Y-Y').
  2. The bogie (10) according to claim 1, wherein each motor (16) is offset relative to the associated wheel (14), along a longitudinal direction (X-X') orthogonal to the transverse direction (Y-Y').
  3. The bogie (10) according to any one of claims 1 to 2, wherein each wheel (14) is mounted on a respective hub (38) contained in an axle box (34), the reduction gear (18) associated with the wheel (14) also being contained in the axle box (34).
  4. The bogie (10) according to claim 3, wherein the axle boxes (34) are fastened to one another in pairs by end crosspieces (36) extending substantially along the transverse direction (Y-Y').
  5. The bogie (10) according to any one of claims 3 and 4, wherein the axle boxes (34) are fastened to the chassis (12) by primary suspension devices (31), each primary suspension device (31) being arranged to allow travel of the axle boxes (34) relative to the chassis (12) only along an elevation direction (Z-Z') substantially perpendicular to the transverse direction (Y-Y').
  6. The bogie (10) according to any one of claims 1 to 5, wherein each motor (16) comprises a shaft rotatable relative to the chassis (12) along a respective rotation axis parallel to the transverse direction (Y-Y'), said shaft connecting an output of the motor (16) to an input of a corresponding reduction gear (18).
  7. The bogie (10) according to any one of claims 1 to 6, wherein the bogie (10) is a pivoting bogie comprising a load-bearing crosspiece (80) comprising a ball bearing (82) articulated rotatably around an axis of rotation extending along an elevation direction (Z-Z') substantially perpendicular to the transverse direction (Y-Y'), the ball bearing (82) being intended to support a rail vehicle body.
  8. The bogie (10) according to claim 7, wherein the load-bearing crosspiece (80) comprises a central part (84) extending in the space (E) along the transverse direction (Y-Y') and two lateral parts (86) extending the central part (84) to the outside of the space (E) along the transverse direction (Y-Y'), the central part (84) having a thickness (e1 ), measured along an elevation direction (Z-Z') substantially perpendicular to the transverse direction (Y-Y'), greater than a thickness (e2 ) of the lateral parts (86) measured along the elevation direction (Z-Z').
  9. The bogie (10) according to any one of claims 1 to 8, comprising four braking devices (60) associated with the wheels (14), each braking device (60) comprising a brake caliper (62) arranged to slow the rotation of the respective wheel (14), the brake caliper (62) being arranged completely below the motor (16) driving the wheel (14) along an elevation direction (Z-Z') substantially perpendicular to the transverse direction (Y-Y').
  10. A rail vehicle comprising at least one bogie (10) according to any one of claims 1 to 9, and at least one vehicle body carried by the bogie, the body comprising at least twelve seats arranged in line with the bogie (10) on a same story, the body also comprising a lowered floor, extending substantially on the same level over the entire story.
EP19206960.7A 2018-11-06 2019-11-04 Bogie for rail vehicle Active EP3650304B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1860194A FR3088042B1 (en) 2018-11-06 2018-11-06 BOGIE FOR RAIL VEHICLE

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EP3650304A1 EP3650304A1 (en) 2020-05-13
EP3650304B1 true EP3650304B1 (en) 2021-02-17

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CN114750800A (en) * 2022-05-25 2022-07-15 中铁磁浮交通投资建设有限公司 Magnetomotive walking mechanism and medium-short distance magnetomotive material transportation engineering vehicle

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CN111137316A (en) 2020-05-12
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FR3088042B1 (en) 2020-11-27
EP3650304A1 (en) 2020-05-13
ES2869933T3 (en) 2021-10-26

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