EP4082866A1 - Bogie for a railway vehicle, railway vehicle comprising such a bogie - Google Patents

Abstract

A bogie (6) for a railway vehicle, comprises a frame (10), a first axle (16a), a second axle (16b) and a third axle (16c) mounted on the frame, each axle comprising a motor unit (20) mounted on the axle, the second axle being positioned between the first axle and the third axle following a main direction of the bogie, in which each axle defines a first side and a second side respectively following the main direction, the motor unit of the first axle being placed on the first side of the axle, towards the outside of the bogie in the main direction, the engine block of the second axle being placed on the second side of the axle, towards the third axle in the main direction, and in which the bogie has a receiving area located between the first axle and the second axle for connecting a drive device (18).

Description

The present invention relates to a bogie for a railway vehicle. The invention relates to a railway vehicle comprising at least one such bogie.

The invention relates more particularly to bogies comprising three motorized axles (sometimes called "type C" bogies, in particular used in "Co'Co'" type locomotives according to the classification of the International Union of Railways - UIC ).

Bogies comprising three axles and where each axle is provided with a traction motor mounted on this axle are known. Each bogie is connected to the chassis of the vehicle by a connection and damping device comprising in particular a drive rod, one end of which is fixed to the frame of the bogie.

A problem is that the insertion of this connecting device requires space, which increases the length of the bogie to the point of complicating the integration of the bogie in certain railway vehicles.

It is these drawbacks that the invention more particularly intends to remedy by proposing a bogie for a railway vehicle which is more compact, for example to free up space under the body of the railway vehicle without lengthening the bogie, in particular to insert more easily a drive rod.

To this end, one aspect of the invention relates to a bogie for a railway vehicle, comprising a chassis, a first axle, a second axle and a third axle mounted on the chassis, each axle comprising an engine block mounted on the axle, the second axle being positioned between the first axle and the third axle following a main direction of the bogie, in which each axle defines a first side and a second side respectively following the main direction.

The engine block of the first axle is placed on a first side of the axle, towards the outside of the bogie in the main direction. The engine block of the second axle is placed on the second side of the axle, towards the outside of the bogie in the main direction, and the bogie has a reception area for connecting a drive device, the reception area being located between the first axle and the second axle.

Thanks to the invention, by reversing the arrangement of the engine block of the first axle with respect to the other axles (and in particular with respect to the second axle), it is possible to free up enough space to allow the insertion of the drive device between the first axle and the second axle. This space saving comes from the fact that the engine block of the first axle is turned towards the outside of the bogie, instead of being turned towards the second axle as is the case in known bogies. This space saving makes it possible to provide a more compact bogie and, ultimately, to limit the spacing between the bogies of the vehicle.

• le bloc moteur comporte un moteur de traction ou un motoréducteur fixé à une enveloppe montée de façon concentrique autour de l'essieu.
• le moteur de traction ou le motoréducteur est en outre fixé à un montant transversal du châssis.
• le châssis du bogie comporte deux montants longitudinaux et des montants transversaux.
• le bloc moteur est un moteur suspendu de type « canon-box »;.
• le bogie comprend le dispositif d'entrainement, le dispositif d'entrainement étant de préférence une bielle d'entraînement.
• le dispositif d'entrainement est fixé sur un montant transversal du châssis positionné entre le premier essieu et le deuxième essieu.

According to advantageous but not mandatory aspects, such a bogie may incorporate one or more of the following characteristics, taken separately or in any technically permissible combination:

• the engine block comprises a traction motor or a geared motor fixed to a casing mounted concentrically around the axle.
• the traction motor or the geared motor is also fixed to a transverse upright of the frame.
• the bogie frame has two longitudinal uprights and transverse uprights.
• the engine block is a “cannon-box” type suspended engine;.
• the bogie includes the drive device, the drive device preferably being a drive rod.
• the drive device is fixed to a transverse upright of the chassis positioned between the first axle and the second axle.

According to another aspect, the invention relates to a railway vehicle comprising at least one bogie as defined above, each of said bogies being mechanically coupled to a drive device fixed on the one hand to the reception area on the frame of the bogie between the first axle and the second axle of said bogie and on the other hand to a body or a chassis of the railway vehicle.

According to another aspect, each of said bogies is oriented such that the first axle of this bogie is arranged at the end of the rail vehicle.

• [Fig 1] la figure 1 est une représentation schématique, selon une vue en coupe, d'un véhicule ferroviaire comportant un bogie conforme à l'invention ;
• [Fig 2] la figure 2 est une représentation schématique d'un bogie du véhicule ferroviaire de la figure 1 ;
• [Fig 3] la figure 3 est une représentation schématique d'un axe du bogie de la figure 2.

The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a bogie given solely by way of example and made with reference to the drawings. annexes, in which:

• [ Fig 1 ] the figure 1 is a schematic representation, according to a sectional view, of a railway vehicle comprising a bogie according to the invention;
• [ Fig 2 ] the figure 2 is a schematic representation of a bogie of the railway vehicle of the figure 1 ;
• [ Fig.3 ] the figure 3 is a schematic representation of an axis of the bogie of the figure 2 .

The figure 1 represents a railway vehicle 2 comprising at least one bogie 6.

For example, vehicle 2 is a railway car, or a wagon, or a locomotive, or any other railway vehicle.

In the example illustrated, the vehicle 2 comprises a chassis 4 or a body 4 and two bogies 6. Each bogie 6 is arranged at one end of the vehicle 2. The bogies 6 are preferably identical or similar.

The distance "L" corresponds to the length between the inner ends of the two bogies 6 of the vehicle 2, this distance being measured along the longitudinal axis of the vehicle 2.

A bogie 6 is shown in more detail with reference to the figure 2 .

The bogie 6 comprises a frame 10 which, in the example illustrated, comprises two longitudinal uprights 12 and a plurality of transverse uprights or transverse beams 14, which for example extend perpendicular to the longitudinal uprights 12. For example, the chassis 10 is a metal piece formed in one piece.

The longitudinal uprights 12 and the transverse uprights 14 delimit here three housings 16 each configured to receive an axle.

The bogie 6 has three axles: a first axle 16a, a second axle 16b and a third axle 16c, these three axles being mounted on the frame 10.

For example, the first axle 16a and the third axle 16c are arranged at opposite ends of the bogie 6. The second axle 16b is placed between the first axle 16a and the third axle 16c.

The bogie 6 further comprises a reception area for connecting a drive device such as a drive rod 18.

The reception area is located between the first axle and the second axle. The drive device 18 is connected to the vehicle 2, for example directly connected to the chassis 4 or to the body 4 of the vehicle 2. In practice, the drive device 18 can be part of a connection and damping device associated with bogie 6.

As illustrated on the figure 2 and 3 , each axle 16 comprises a motor unit 20 mounted on each axle. In other words, each axle is motorized.

The engine block 20 is configured to drive the wheels 22 of the axle in rotation, with a view to driving the vehicle 2 in motion along a railway track.

For example, the engine block 20 is a suspended engine of the “cannon-box” type.

In the example illustrated, the engine block 20 comprises a traction motor 26, for example fixed to a casing 24 (or casing) mounted around the axle, the casing 24 being able to be mounted concentrically with the axle.

The geometric axis X20 schematically represents the direction of the axle 16.

The traction motor 26 is coupled to a transmission device 28, such as a reducer. For example, transmission device 28 may include one or more gears.

The traction motor 26 and the transmission device 28 can be grouped together within the same gearmotor group, for example inside the same casing.

The transmission device 28 is here mounted around the axle, for example concentrically with the axis X20.

For example, the transmission device 28 can be placed close to one end of the axle, between a wheel 22 and the housing of the traction motor 24. In other words, the transmission device 28 is offset with respect to the center of the axle. 'axle, and is placed towards one side of the axle.

Preferably, the traction motor 26 or the geared motor 26 can also be fixed to a transverse upright 14 of the frame. This fixing is preferably carried out by an anti-winding connecting rod to prevent rotation of the geared motor unit around the axle.

According to one aspect of the invention, the engine block 20 of the first axle 16a is placed on a first side of the axle, towards the outside of the bogie, the engine block 20 of the third axle 16c is placed on a second side of the axle, towards the outside of the bogie, and the engine block 20 of the second axle 16b is oriented in the same way as the third axle.

In other words, the first axle 16a is turned over with respect to the second axle (for example mounted with an inverted symmetry with respect to the second axle 16b).

More generally, the engine block of the second axle 16b is placed on a second side of the axle, towards the outside of the bogie, while the engine block of the first axle 16a is placed on a first side of the axle, towards the outside of the bogie, the engine block of the third axle being able to be placed either on a first or on a second side of the axle.

Moreover, as seen in the picture 2 , the transmission device 28 of the first axle 16a is here placed on the opposite side with respect to the transmission device 28 of the second axle 16b.

Thanks to the invention, by reversing the arrangement of the first axle 16a with respect to the other axles of the bogie and in particular with respect to the second axle 16b, it is possible to free up enough space between the first axle 16 and the second axle 16b to allow the insertion of the drive device 18 between the first axle and the second axle.

On the contrary, if the first axle were arranged in the same way as the second axle, there would not be enough space to insert the drive device 18.

The vehicle frame would then have to be lengthened to accommodate the drive device, or else the spacing L between the two bogies would have to be shortened, which would prevent technical equipment from being housed under the body between the bogies.

Also, attaching the drive device 18 between the first axle and the second axle, rather than connecting it to one end of the bogie, makes it possible to maintain a sufficient length between the two bogies 6, which makes it possible to have sufficient space. to accommodate equipment, in particular traction equipment, under the chassis 4.

In this example given for illustration purposes, the length between the end axles of the vehicle 2 (that is to say, between the first axles 16a of the two bogies 6) is equal to 16.82 meters. The spacing between two consecutive axles of the same bogie is equal to 2 meters. The length L available between the two bogies 6 is equal to 6.3 meters.

By comparison, increasing the length of each bogie 6 without changing the orientation of the first axle 16a only makes it possible to have a useful length of 5.8 meters between the two bogies 6. And, attaching the drive device at the end of bogie without lengthening the bogie only allows a useful length of 4.5 meters between the two bogies 6.

In addition, not increasing the distance between the first axle and the second axle of the bogie 6 is advantageous because this improves the dynamic behavior of the vehicle 2, for example by providing better curve registration, and by reducing the force exerted on the track.

Preferably, as seen on the figure 1 , each of the two bogies 6 of the vehicle 2 is arranged so that the first axle 16a of each bogie 6 is oriented towards the corresponding end of the vehicle 2.

For example, the engine block 20 of the first axle 16a of the front bogie faces the front of car 2, and the engine block 20 of the second axle 16b of the front bogie faces the rear of car 2.

Each of the two bogies 6 of the vehicle 2 is mechanically coupled to a drive device 18 fixed to a reception area on the frame of the bogie between the first axle 16a and the second axle 16b of said bogie.

Many other embodiments are possible.

The embodiments and variants considered above can be combined together to create new embodiments.

Claims (9)

Bogie (6) for a railway vehicle (2), comprising a frame (10), a first axle (16a), a second axle (16b) and a third axle (16c) mounted on the frame, each axle comprising an engine block ( 20) mounted on the axle, the second axle being positioned between the first axle and the third axle (16a, 16c) following a main direction of the bogie, in which each axle defines a first side and a second side respectively following the main direction , the engine block of the first axle being placed on the first side of the first axle, towards the outside of the bogie in the main direction and the engine block of the second axle being placed on the second side of the second axle, towards the third axle in the main direction , being returned with respect to the first motor, and in which the bogie comprises a reception zone for connecting a drive device (18), the reception zone being located between the first axle and the second axle. Bogie according to Claim 1, in which each motor unit comprises a traction motor or a geared motor (26) fixed to a casing (24) mounted concentrically around the corresponding axle. Bogie according to the preceding claim, in which the traction motor or the geared motor (26) is also fixed to a transverse upright (14) of the frame. Bogie according to any one of the preceding claims, in which the frame (10) of the bogie comprises two longitudinal uprights (12) and transverse uprights (14). Bogie according to any one of the preceding claims, in which each engine block is a suspended engine of the "cannon-box" type. A bogie according to any preceding claim, wherein the bogie comprises the drive device, the drive device preferably being a drive link. Bogie according to the preceding claim, in which the drive device is fixed to a transverse upright of the chassis positioned between the first and the second axles. Rail vehicle (2) comprising at least one bogie (6) according to any one of the preceding claims, the or each bogie (6) being mechanically coupled to a drive device (18) fixed on the one hand to the reception on the bogie frame between the first axle (16a) and the second axle (16b) of said bogie and on the other hand to a body or a frame of the railway vehicle. Railway vehicle (2) according to the preceding claim, in which each of the said bogies (6) is oriented so that the first axle (16a) of this bogie is disposed at the end of the railway vehicle.

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