EP3650305B1 - Bogie and railway vehicle - Google Patents

Bogie and railway vehicle Download PDF

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Publication number
EP3650305B1
EP3650305B1 EP19207181.9A EP19207181A EP3650305B1 EP 3650305 B1 EP3650305 B1 EP 3650305B1 EP 19207181 A EP19207181 A EP 19207181A EP 3650305 B1 EP3650305 B1 EP 3650305B1
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EP
European Patent Office
Prior art keywords
bogie
height
frame
support device
secondary suspension
Prior art date
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EP19207181.9A
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German (de)
French (fr)
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EP3650305A1 (en
Inventor
Alain Rodet
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Alstom Holdings SA
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Alstom Transport Technologies SAS
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Publication of EP3650305A1 publication Critical patent/EP3650305A1/en
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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
    • 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
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/04—Bolster supports or mountings
    • B61F5/06—Bolster supports or mountings incorporating metal springs
    • 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

Definitions

  • the present invention relates to a bogie of the bogie type for a railway vehicle comprising a bogie frame, at least one pair of wheels movable in rotation relative to the frame and at least one secondary suspension configured to connect the bogie to a vehicle body.
  • the frame comprises at least a first spar extending substantially in a longitudinal direction, at least a second spar extending substantially parallel to the first spar, at least a first cross member and at least a second cross member each extending in a transverse direction substantially perpendicular to the longitudinal direction.
  • the first and second crosspieces respectively connect the first and second beams together.
  • the invention also relates to a railway vehicle comprising such a bogie.
  • the document DE 16 05 080 B1 describes a low-wear bogie for high-speed rail vehicles.
  • a lowered floor that is to say a floor extending fairly close to the ground.
  • a lowered floor in fact facilitates access to the vehicle from the outside, in particular for people with reduced mobility, such as disabled people, travelers using a stroller, etc.
  • the surface of the floor comprises for example raised parts above the bogies, for example connected to lowered parts of the floor between the bogies by one or more steps.
  • the subject of the invention is a bogie according to claim 1.
  • Such a bogie makes it possible to have a railway vehicle comprising an integral lowered floor, in particular above the bogie, while maintaining a space requirement on the track reduced to a minimum.
  • the bogie is according to any one of claims 2 to 9.
  • the invention also relates to a railway vehicle according to claim 10.
  • a longitudinal direction X-X' corresponding to the direction of travel of the railway vehicle is defined, a transverse direction Y-Y' orthogonal to the longitudinal direction X-X', extending in a horizontal plane when the railway vehicle is traveling on a horizontal plane, and a direction of elevation Z-Z' substantially orthogonal to the transverse direction Y-Y' and to the longitudinal direction X-X'.
  • a gauge of the railway vehicle is also defined delimiting the perimeter in which the railway vehicle can extend along the transverse direction YY' and along the elevation direction ZZ.
  • the gauge G of the lower parts (visible in particular on the picture 3 ) defining the lower perimeter in which the railway vehicle, in particular the bogie 10, can extend.
  • FIG. 1 represents a bogie 10 according to a first embodiment, intended to equip a railway vehicle (not represented).
  • the bogie 10 is in particular suitable for being installed on a railway vehicle with an integral lowered floor.
  • the railway vehicle comprises at least one car, comprising a vehicle body defining a floor 11 (in particular visible on the picture 3 ), and that the floor 11 extends substantially at a constant height, measured in the direction of elevation Z-Z', including to the right of the bogie 10.
  • the floors of these cars are for example all extend to the same constant height.
  • the railway vehicle can include a large number of seats, in particular seats located in line with the bogie 10, in particular at least twelve seats on the same floor in line with the bogie 10, thanks to the fully lowered floor 11.
  • the floor 11 is positioned at a height H relative to the rails R (as shown in particular on the picture 3 ) on which the bogie 10 is intended to travel.
  • the height H is for example substantially between 350 mm and 380 mm.
  • the bogie 10 comprises a bogie frame 12, primary suspensions 14, two end crosspieces 16A, 16B, two pairs of wheels each comprising two wheels 18, rotatable relative to the end crosspieces 16A, 16B, suspensions secondary 22 and, in the case of a motorized bogie, a first and a second motor 20A, 20B. More particularly, the wheels 18 are rotatable relative to the frame 12 in particular via the end crosspieces 16A, 16B.
  • the frame 12 comprises at least a first spar 30A extending substantially in the longitudinal direction X-X', at least a second spar 30B extending substantially parallel to the first spar 30A, at least a first crosspiece 42A and at least a second crosspiece 42B each extending in a transverse direction substantially perpendicular to the longitudinal direction, the first and second crosspieces 42A, 42B respectively connecting the first and second beams 30A, 30B to one another.
  • the frame 12 is connected to the end crosspieces 16A, 16B via the primary suspensions 14 and to the vehicle body (not shown) by secondary suspensions 22.
  • the secondary suspensions 22 extend in particular between the bogie 10 and the vehicle body.
  • the primary suspensions 14 are known per se, and include, for example, springs and/or shock absorbers.
  • two primary suspensions 14 respectively connect one end of an end cross member 16A, 16B to the frame 12.
  • the primary suspensions 14 are thus adapted to allow movement of the wheels 18 and the end cross members 16A, 16B with respect to to the frame 12 in the direction of elevation Z-Z'.
  • the end crosspieces 16A, 16B are beams, for example metal, of elongated shape extending along a direction of elongation along the transverse direction Y-Y'. Each end crosspiece 16A, 16B connects two wheels 18 of a pair of wheels respectively.
  • Each wheel 18 is mounted rotatably relative to the frame 12.
  • the first motor 20A is arranged, in the longitudinal direction X-X', between two wheels 18 on a first lateral side of the bogie 10, and the second motor 20B is disposed, in the longitudinal direction X-X', between two wheels 18 on a second lateral side opposite the first side in the transverse direction Y-Y'.
  • Each motor 20A, 20B is an electric motor known per se.
  • the first motor 20A is configured to drive the wheels 18 arranged on the first lateral side, for example via transmission boxes 21 each connected to a respective wheel 18.
  • the second motor 20B is configured to drive the wheels 18 arranged on the second lateral side, for example via corresponding transmission boxes 21.
  • each motor 20A, 20B is configured to drive two wheels 18.
  • the bogie 10 is also called bogie with transmission per side of the bogie 10 (or “per side drive").
  • the chassis 12 also called frame, comprises the first beam 30A extending in the longitudinal direction X-X', the second beam 30B extending substantially parallel to the first beam 30A and spaced from the latter in the transverse direction.
  • the beams 30A, 30B are for example elongated metal beams, each extending along a corresponding direction of elongation.
  • Each spar 30A, 30B comprises, in the direction of elongation, a first end part 32A, 32B, a first inclined section 34A, 34B, a central part 36A, 36B, a second inclined section 38A, 38B and a second part end 40A, 40B.
  • the first and second end portions 32A, 32B, 40A, 40B extend along the direction of elongation along the longitudinal direction X-X' at substantially the same height.
  • the central part 36A, 36B is lowered relative to the end parts 32A, 32B, 40A, 40B, ie it extends to a height lower than the height of the end parts.
  • the central part 36A, 36B extends along the direction of elongation along the longitudinal direction X-X'.
  • the first and second inclined sections 34A, 34B, 38A, 38B join the central part 36A, 36B respectively to the first end part 32A, 32B and to the second end part 40A, 40B.
  • each first and second inclined section 34A, 34B, 38A, 38B has a curved shape.
  • each first and second inclined section 34A, 34B, 38A, 38B forms an "S" along the direction of elongation in a plane formed by the longitudinal direction X-X' and the elevation direction Z-Z', the one of the ends of the S being linked to an end part 32A, 32B, 40A, 40B and the other end of the S being linked to the central part 36A, 36B.
  • the bogie 10 further comprises, according to the example of figure 1 , the first crosspiece 42A extending along a direction of elongation along the direction transverse YY' and the second crosspiece 42B extend along the direction of elongation substantially parallel to the first crosspiece 42A.
  • the first and second crosspieces 42A, 42B respectively connect the first and second beams 30A, 30B to each other.
  • the first crosspiece 42A connects the first inclined section 34A with the corresponding first inclined section 34B of the second spar 30B and the second crosspiece 42B connects the second inclined section 38A with the corresponding second inclined section 38B of the second spar 30B.
  • the side members 30A, 30B and the crosspieces 42A, 42B have, for example, rectangular sections in a plane orthogonal to their direction of elongation.
  • the beams 30A, 30B and the crosspieces 42A, 42B have an I-shaped section in a plane orthogonal to their direction of elongation.
  • their section in this plane has a shape comprising a main section extending in the direction of elevation Z-Z' and two transverse sections connected to the ends of the main section in their respective environments, the transverse sections being orthogonal to the main section.
  • Such a shape of the section of the crosspieces 42A, 42B and the side members 30A, 30B gives them a lower bending resistance, which increases the flexibility of the frame 12.
  • the crosspieces 42A, 42B and the side members 30A, 30B have an L-shaped, T-shaped, Z-shaped section, or another shape giving them suitable resistance to bending.
  • the central space 44 has a substantially rectangular section in a plane substantially orthogonal to the direction of elevation Z -Z'.
  • the bogie 10 comprises two secondary suspensions 22 arranged inside the central space 44.
  • Each secondary suspension 22 is configured to connect the bogie 10 to the vehicle body.
  • the height of at least part of the secondary suspension 22 is less than or equal to the minimum height of the frame 12 in the elevation direction Z-Z'.
  • the height relative to the rails R of the secondary suspension 22 is substantially equal to the height of the chassis 12.
  • Each secondary suspension 22 comprises, according to the example of figure 1 , a pair of springs 45.
  • Each spring 45 comprises for example a coil spring.
  • each secondary suspension 22 comprises, for each spring 45, an additional spring 48 disposed in an interior space defined by the spring 45.
  • each secondary suspension 22 comprises at least one cylinder.
  • the bogie 10 further comprises, for example, two support devices 46 configured to support the secondary suspensions 22.
  • Each support device 46 comprises for example a material having a higher material hardness than that of a material of the frame 12.
  • material hardness it is understood for example the Rockwell hardness of the material.
  • Each support device 46 has for example the shape of a bathtub or cradle.
  • Each support device 46 comprises a support surface 50, a lower surface 51 (visible in particular on the picture 3 ) and vertical walls 52, connected by the support surface 50 at one of their ends, their other end defining an opening from the top.
  • the support device 46 may optionally include a side opening in the transverse direction Y-Y'.
  • the support surface 50 is configured to support the secondary suspensions 22.
  • each secondary suspension 22 rests on the support surface 50.
  • Each secondary suspension 22 extends along an axis substantially perpendicular to the support surface 50. As shown in particular on the picture 3 , each secondary suspension 22 extends in the direction of elevation Z-Z'. An upper end of each secondary suspension 22 is connected to the floor 11 of the vehicle body. The body thus rests, via the secondary suspensions 22, on the support surface 50.
  • the support device 46 is particularly close to the rails R. Because of the possible vertical movements of the bogie 10 with respect to the rails R, the lower surface 51 must extend substantially parallel to the rails R, in order to avoid interfering with the template G.
  • the lower surface 51 is a machined surface. This provides a defined space between the lower surface 51 and the rails R.
  • support surface 50 is also a machined surface. This makes it possible to minimize the thickness of the support device 46 in the direction of elevation Z-Z′, while ensuring sufficient rigidity of the support device 46 to support the weight of the vehicle body.
  • the support device 46 is very close to the gauge G of the lower parts.
  • the support device 46 is arranged at a height of 10 mm with respect to the template G.
  • Each support device 46 further comprises two support ends 54 configured to connect the support device 46 to the first and second crosspieces 42A, 42B via a plurality of damping devices 56.
  • each support end 54 is configured to rest on an upper surface of the first or second crosspiece 42A, 42B, via the damping devices 56.
  • Each damping device 56 is configured to attenuate a transmission of vibrations from the chassis 12 to the secondary suspensions 22 and thus to the body.
  • Each damping device 56 comprises for example an elastic element, such as a rubber stud.
  • the support device 46 is connected to the frame 12 by four damping devices 56.
  • Each damping device 56 is for example fixed by at least one screw 58 (visible in particular at the picture 3 ) to the frame 12, and in particular to the first or second crosspiece 42A, 42B.
  • damping devices 56 between the support device 46 and the frame 12 makes it possible to reduce the height of the secondary suspension 22 with respect to the rail R.
  • damping means placed, in the direction of elevation, at the -above or below the springs 45 are not necessary, vibrations of the chassis 12 being attenuated by the damping devices 56 which extend on either side of the secondary suspension and therefore do not add to the bulk of the bogie in the elevation direction.
  • the support device 46 is connected to the frame 12 via at least one elastic joint (not shown).
  • a second embodiment of the bogie 110 is represented on the picture 2 .
  • the corresponding elements of the first embodiment are not described again.
  • the corresponding elements include the same references as in the first embodiment, increased by 100.
  • bogie 10 of the first embodiment is referenced as bogie 110 in the second embodiment.
  • the bogie 110 comprises four motors 120A, 120B, 120C and 120D.
  • Each motor 120A, 120B, 120C and 120D is connected to a corresponding wheel 118 and configured to drive this wheel 118.
  • the secondary suspensions 122 are positioned outside the central space 144 in the transverse direction Y-Y'.
  • the first secondary suspension 122 is positioned between two wheels 118 on a first lateral side of the bogie 110
  • the second secondary suspension 122 is positioned between two wheels 118 on a second lateral side of the bogie 110 opposite the first side.
  • the first and second crosspieces 142A, 142B comprise elongated ends 147 extending beyond the side members 130A, 130B in the transverse direction Y-Y'.
  • Each elongated end 147 is configured to support a support device 146.
  • each elongated end 147 comprises a separate structure from the corresponding crosspiece 142A, 142B, the separate structure being connected to the corresponding crosspiece 142A, 142B.
  • the floor 11 of the railway vehicle is positioned at a height H relative to the rail R.
  • the height H is made up, according to the direction of elevation Z-Z', of the sum of a first height H1, of a second height H2, a third height H3 and a fourth height H4.
  • the first height H1 is the distance between the rail R and the lower surface 51 of the support device 46.
  • the second height H2 is the thickness of the support device 46 in the elevation direction Z-Z'. In other words, the second height H2 is the distance in the elevation direction Z-Z' between the support surface 50 and the lower surface 51.
  • the third height H3 is the height of the secondary suspension 22.
  • the fourth height H4 is the thickness of floor 11 in elevation direction Z-Z'.
  • the height H is for example between 350 mm and 380 mm, or even about 420 mm via a slight slope from a central corridor, located between 350 and 380 mm above the rail.
  • the lower surface 51 of the support device 46 thus extends at a distance less than or equal to 75 mm with respect to the rail R.
  • the lower surface 51 has a distance D to the upper part of the template G of the lower parts substantially equal to 15 mm, the template usually being 60 mm from the rail (height H0).
  • the minimum height of the chassis 12 is a minimum height of the chassis relative to the rail R on which the bogie 10 is intended to travel.
  • the height H0+E of the frame 12 relative to the rails R is reduced. Because the support device 46 is connected to the frame 12, the height H1 of the support device 46 is also reduced.
  • the support device 46 and the frame 12 are two separate parts.
  • the support device 46 extends in particular to a height lower than that of the frame 12.
  • the height of the support device 46 relative to the frame 12 is adaptable according to the direction of elevation Z-Z', for example according to the wear of the wheels 18.
  • the bogie 10 is adapted to receive one or more adjustment pieces between the bearing ends 54 and the crosspieces 42A, 42B to keep the height H1 constant although the height of the frame 12 is reduced.
  • the adjustment part is for example a wedge or an additional elastic cushion forming a damping device as described above.
  • the height of the frame 12 relative to the rails R is reduced.
  • the height of the support device 46 is thus increased.
  • the height of the support device 46 is adaptable makes it possible to avoid, during wear of the wheels 18, that the support device 46 extends under the lower part of the gauge of the railway vehicle and can thus interfere with the gauge G of the lower parts or with elements extending over the tracks on which the railway vehicle travels.
  • each secondary suspension 22 at a height less than or equal to a minimum height of the first and second side members 30A, 30B makes it possible to lower the floor 11.
  • the bogie 10, 110 makes it possible to have the least twelve seats to the right of the bogie 10, 110 on the same floor, and to obtain a body comprising a lowered floor, extending substantially at the same level over the entire floor.
  • the bogies described above are motorized bogies. It is however understood that the invention can also be applied to bogies without motors.

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Description

La présente invention concerne un bogie du type bogie pour un véhicule ferroviaire comprenant un châssis de bogie, au moins une paire de roues mobiles en rotation par rapport au châssis et au moins une suspension secondaire configurée pour relier le bogie à une caisse de véhicule. Le châssis comprend au moins un premier longeron s'étendant sensiblement selon une direction longitudinale, au moins un deuxième longeron s'étendant sensiblement parallèlement au premier longeron, au moins une première traverse et au moins une deuxième traverse s'étendant chacune selon une direction transversale sensiblement perpendiculaire à la direction longitudinale. Les première et deuxième traverses relient respectivement les premier et deuxième longerons entre eux. L'invention concerne également un véhicule ferroviaire comprenant un tel bogie.The present invention relates to a bogie of the bogie type for a railway vehicle comprising a bogie frame, at least one pair of wheels movable in rotation relative to the frame and at least one secondary suspension configured to connect the bogie to a vehicle body. The frame comprises at least a first spar extending substantially in a longitudinal direction, at least a second spar extending substantially parallel to the first spar, at least a first cross member and at least a second cross member each extending in a transverse direction substantially perpendicular to the longitudinal direction. The first and second crosspieces respectively connect the first and second beams together. The invention also relates to a railway vehicle comprising such a bogie.

Le document DE 16 05 080 B1 décrit un bogie à faible usure pour les véhicules ferroviaires à grande vitesse.The document DE 16 05 080 B1 describes a low-wear bogie for high-speed rail vehicles.

Dans un véhicule ferroviaire, et notamment dans un véhicule ferroviaire destiné au transport intra-urbain comme par exemple les tramways, il est souhaitable d'augmenter l'espace disponible pour les voyageurs du véhicule ferroviaire au droit du bogie afin d'optimiser la capacité du véhicule ferroviaire.In a railway vehicle, and in particular in a railway vehicle intended for intra-urban transport such as for example trams, it is desirable to increase the space available for the passengers of the railway vehicle at the right of the bogie in order to optimize the capacity of the railway vehicle.

En outre, il est souhaitable de disposer d'un plancher abaissé, c'est-à-dire un plancher s'étendant assez proche du sol. Un tel plancher abaissé facilite en effet l'accès au véhicule depuis l'extérieur, notamment pour les personnes à mobilité réduite, telles que les personnes handicapées, les voyageurs utilisant une poussette, etc.Furthermore, it is desirable to have a lowered floor, that is to say a floor extending fairly close to the ground. Such a lowered floor in fact facilitates access to the vehicle from the outside, in particular for people with reduced mobility, such as disabled people, travelers using a stroller, etc.

Cependant, certains éléments du bogie présentent un encombrement élevé. Pour ménager l'espace nécessaire pour ces éléments en-dessous du plancher, la surface du plancher comporte par exemple des parties surélevées au-dessus des bogies, par exemple reliées à des parties abaissées du plancher entre les bogies par une ou plusieurs marches.However, some elements of the bogie have a high bulk. To provide the necessary space for these elements below the floor, the surface of the floor comprises for example raised parts above the bogies, for example connected to lowered parts of the floor between the bogies by one or more steps.

Cependant, la présence de marches complique la circulation à l'intérieur du véhicule ferroviaire, notamment pour les personnes à mobilité réduite.However, the presence of steps complicates movement inside the rail vehicle, especially for people with reduced mobility.

Il est donc souhaitable de fournir un bogie et un véhicule ferroviaire présentant une meilleure configuration des éléments de bogie, permettant notamment de maintenir un plancher abaissé sur l'ensemble de la surface du plancher.It is therefore desirable to provide a bogie and a railway vehicle having a better configuration of the bogie elements, making it possible in particular to maintain a lowered floor over the entire surface of the floor.

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, notamment au-dessus du bogie, tout en maintenant un encombrement sur la voie réduit au minimum.Such a bogie makes it possible to have a railway vehicle comprising an integral lowered floor, in particular above the bogie, while maintaining a space requirement on the track reduced to a minimum.

Selon des modes de réalisation particuliers de l'invention, le bogie est selon l'une quelconque des revendications 2 à 9.According to particular embodiments of the invention, the bogie is according to any one of claims 2 to 9.

L'invention concerne également un véhicule ferroviaire selon la revendication 10.The invention also relates to a railway vehicle according to claim 10.

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,
  • la figure 2 est une vue en perspective d'un bogie selon un deuxième mode de réalisation, et
  • la figure 3 est une vue en coupe longitudinale d'une partie du bogie de la figure 1 ou de la figure 2 selon un plan III-III.
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:
  • there figure 1 is a perspective view of a bogie according to a first embodiment,
  • there picture 2 is a perspective view of a bogie according to a second embodiment, and
  • there picture 3 is a longitudinal sectional view of part of the bogie of the figure 1 or the figure 2 according to a plan III-III.

Dans ce qui suit, il est défini une direction longitudinale X-X' correspondant à la direction de circulation du véhicule ferroviaire, une direction transversale Y-Y' orthogonale à la direction longitudinale X-X', s'étendant dans un plan horizontal lorsque le véhicule ferroviaire circule sur un plan horizontal, 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 X-X' corresponding to the direction of travel of the railway vehicle is defined, a transverse direction Y-Y' orthogonal to the longitudinal direction X-X', extending in a horizontal plane when the railway vehicle is traveling on a horizontal plane, and a direction of elevation Z-Z' substantially orthogonal to the transverse direction Y-Y' and to the longitudinal direction X-X'.

Il est également défini un gabarit du véhicule ferroviaire délimitant le périmètre dans lequel le véhicule ferroviaire peut s'étendre selon la direction transversale Y-Y' et selon la direction d'élévation Z-Z. Le gabarit G des parties basses (visible notamment sur la figure 3) définissant le périmètre inférieur dans lequel le véhicule ferroviaire, notamment le bogie 10, peut s'étendre.A gauge of the railway vehicle is also defined delimiting the perimeter in which the railway vehicle can extend along the transverse direction YY' and along the elevation direction ZZ. The gauge G of the lower parts (visible in particular on the picture 3 ) defining the lower perimeter in which the railway vehicle, in particular the bogie 10, can extend.

La figure 1 représente un bogie 10 selon un premier mode de réalisation, destiné à équiper un véhicule ferroviaire (non représenté).There figure 1 represents a bogie 10 according to a first embodiment, intended to equip a railway vehicle (not represented).

Le bogie 10 est notamment 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, comprenant une caisse de véhicule définissant un plancher 11 (notamment visible sur la figure 3), et que le plancher 11 s'étend sensiblement à une hauteur constante, mesurée selon la direction d'élévation Z-Z', y compris au droit du bogie 10. Lorsque le véhicule ferroviaire comprend plusieurs voitures, les planchers de ces voitures s'étendent par exemple tous à une même hauteur constante. Ainsi, le véhicule ferroviaire peut comprendre un grand nombre de sièges, notamment des sièges situés au droit du bogie 10, notamment au moins douze sièges sur un même étage au droit du bogie 10, grâce au plancher 11 abaissé intégral. En outre, avec un plancher abaissé, il n'est pas nécessaire de prévoir des marches à l'intérieur du véhicule ferroviaire, ce qui facilite la circulation des passagers. Le plancher 11 est positionné à une hauteur H par rapport à des rails R (comme représenté en particulier sur la figure 3) sur lesquels le bogie 10 est destiné à circuler. La hauteur H est par exemple sensiblement comprise entre 350 mm et 380 mm.The bogie 10 is in particular suitable for being installed on a railway vehicle with an integral lowered floor. By this is meant that the railway vehicle comprises at least one car, comprising a vehicle body defining a floor 11 (in particular visible on the picture 3 ), and that the floor 11 extends substantially at a constant height, measured in the direction of elevation Z-Z', including to the right of the bogie 10. When the railway vehicle comprises several cars, the floors of these cars are for example all extend to the same constant height. Thus, the railway vehicle can include a large number of seats, in particular seats located in line with the bogie 10, in particular at least twelve seats on the same floor in line with the bogie 10, thanks to the fully lowered floor 11. Also, with a lowered floor, it It is not necessary to provide steps inside the railway vehicle, which facilitates the movement of passengers. The floor 11 is positioned at a height H relative to the rails R (as shown in particular on the picture 3 ) on which the bogie 10 is intended to travel. The height H is for example substantially between 350 mm and 380 mm.

Le bogie 10 comprend un châssis 12 de bogie, des suspensions primaires 14, deux traverses d'extrémité 16A, 16B, deux paires de roues comprenant chacune deux roues 18, mobiles en rotation par rapport aux traverses d'extrémité 16A, 16B, des suspensions secondaires 22 et, dans le cas d'un bogie motorisé, un premier et un deuxième moteur 20A, 20B. Plus particulièrement, les roues 18 sont mobiles en rotation par rapport au châssis 12 notamment par l'intermédiaire des traverses d'extrémité 16A, 16B.The bogie 10 comprises a bogie frame 12, primary suspensions 14, two end crosspieces 16A, 16B, two pairs of wheels each comprising two wheels 18, rotatable relative to the end crosspieces 16A, 16B, suspensions secondary 22 and, in the case of a motorized bogie, a first and a second motor 20A, 20B. More particularly, the wheels 18 are rotatable relative to the frame 12 in particular via the end crosspieces 16A, 16B.

Le châssis 12 comprend au moins un premier longeron 30A s'étendant sensiblement selon la direction longitudinale X-X', au moins un deuxième longeron 30B s'étendant sensiblement parallèlement au premier longeron 30A, au moins une première traverse 42A et au moins une deuxième traverse 42B s'étendant chacune selon une direction transversale sensiblement perpendiculaire à la direction longitudinale, les première et deuxième traverses 42A, 42B reliant respectivement les premier et deuxième longerons 30A, 30B entre eux.The frame 12 comprises at least a first spar 30A extending substantially in the longitudinal direction X-X', at least a second spar 30B extending substantially parallel to the first spar 30A, at least a first crosspiece 42A and at least a second crosspiece 42B each extending in a transverse direction substantially perpendicular to the longitudinal direction, the first and second crosspieces 42A, 42B respectively connecting the first and second beams 30A, 30B to one another.

Le châssis 12 est relié aux traverses d'extrémité 16A, 16B par l'intermédiaire des suspensions primaires 14 et à la caisse de véhicule (non représentée) par des suspensions secondaires 22. Les suspensions secondaires 22 s'étendent notamment entre le bogie 10 et la caisse de véhicule.The frame 12 is connected to the end crosspieces 16A, 16B via the primary suspensions 14 and to the vehicle body (not shown) by secondary suspensions 22. The secondary suspensions 22 extend in particular between the bogie 10 and the vehicle body.

Les suspensions primaires 14 sont connues en soi, et comprennent par exemple des ressorts et/ou des amortisseurs. Par exemple, deux suspensions primaires 14 relient respectivement une extrémité d'une traverse d'extrémité 16A, 16B au châssis 12. Les suspensions primaires 14 sont ainsi adaptées pour permettre un débattement des roues 18 et des traverses d'extrémité 16A, 16B par rapport au châssis 12 selon la direction d'élévation Z-Z'.The primary suspensions 14 are known per se, and include, for example, springs and/or shock absorbers. For example, two primary suspensions 14 respectively connect one end of an end cross member 16A, 16B to the frame 12. The primary suspensions 14 are thus adapted to allow movement of the wheels 18 and the end cross members 16A, 16B with respect to to the frame 12 in the direction of elevation Z-Z'.

Les traverses d'extrémité 16A, 16B sont des poutres, par exemple métalliques, de forme allongée s'étendant suivant une direction d'allongement selon la direction transversale Y-Y'. Chaque traverse d'extrémité 16A, 16B relie deux roues 18 d'une paire de roues respectivement.The end crosspieces 16A, 16B are beams, for example metal, of elongated shape extending along a direction of elongation along the transverse direction Y-Y'. Each end crosspiece 16A, 16B connects two wheels 18 of a pair of wheels respectively.

Chaque roue 18 est montée mobile en rotation par rapport au châssis 12.Each wheel 18 is mounted rotatably relative to the frame 12.

Le premier moteur 20A est disposé, selon la direction longitudinale X-X', entre deux roues 18 sur un premier côté latéral du bogie 10, et le deuxième moteur 20B est disposé, selon la direction longitudinale X-X', entre deux roues 18 sur un deuxième côté latéral opposé au premier côté selon la direction transversale Y-Y'. Chaque moteur 20A, 20B est un moteur électrique connu en soi.The first motor 20A is arranged, in the longitudinal direction X-X', between two wheels 18 on a first lateral side of the bogie 10, and the second motor 20B is disposed, in the longitudinal direction X-X', between two wheels 18 on a second lateral side opposite the first side in the transverse direction Y-Y'. Each motor 20A, 20B is an electric motor known per se.

Le premier moteur 20A est configuré pour entraîner les roues 18 disposées du premier côté latéral, par exemple par l'intermédiaire de boîtes de transmission 21 connectées chacune à une roue 18 respective. Le deuxième moteur 20B est configuré pour entraîner les roues 18 disposées du deuxième côté latéral, par exemple par l'intermédiaire de boîtes de transmission 21 correspondantes. En particulier, chaque moteur 20A, 20B est configuré pour entraîner deux roues 18. Le bogie 10 est également appelé bogie à transmission par côté du bogie 10 (ou « per side drive » en anglais).The first motor 20A is configured to drive the wheels 18 arranged on the first lateral side, for example via transmission boxes 21 each connected to a respective wheel 18. The second motor 20B is configured to drive the wheels 18 arranged on the second lateral side, for example via corresponding transmission boxes 21. In particular, each motor 20A, 20B is configured to drive two wheels 18. The bogie 10 is also called bogie with transmission per side of the bogie 10 (or "per side drive").

Dans l'exemple de la figure 1, le châssis 12, également appelé cadre, comprend le premier longeron 30A s'étendant selon la direction longitudinale X-X', le deuxième longeron 30B s'étendant sensiblement parallèlement au premier longeron 30A et écarté de celui-ci selon la direction transversale.In the example of the figure 1 , the chassis 12, also called frame, comprises the first beam 30A extending in the longitudinal direction X-X', the second beam 30B extending substantially parallel to the first beam 30A and spaced from the latter in the transverse direction.

Les longerons 30A, 30B sont par exemple des poutres métalliques de forme allongée, s'étendant chacun selon une direction d'allongement correspondante.The beams 30A, 30B are for example elongated metal beams, each extending along a corresponding direction of elongation.

Chaque longeron 30A, 30B comprend, suivant la direction d'allongement, une première partie d'extrémité 32A, 32B, un premier tronçon incliné 34A, 34B, une partie centrale 36A, 36B, un deuxième tronçon incliné 38A, 38B et une deuxième partie d'extrémité 40A, 40B.Each spar 30A, 30B comprises, in the direction of elongation, a first end part 32A, 32B, a first inclined section 34A, 34B, a central part 36A, 36B, a second inclined section 38A, 38B and a second part end 40A, 40B.

Les premier et deuxième parties d'extrémités 32A, 32B, 40A, 40B s'étendent suivant la direction d'allongement selon la direction longitudinale X-X' sensiblement à une même hauteur. La partie centrale 36A, 36B est abaissée par rapport aux parties d'extrémités 32A, 32B, 40A, 40B, c'est-à-dire qu'elle s'étend à une hauteur inférieure à la hauteur des parties d'extrémité. La partie centrale 36A, 36B s'étend suivant la direction d'allongement selon la direction longitudinale X-X'. Les premier et deuxième tronçons inclinés 34A, 34B, 38A, 38B joignent la partie centrale 36A, 36B respectivement à la première partie d'extrémité 32A, 32B et à la deuxième partie d'extrémité 40A, 40B.The first and second end portions 32A, 32B, 40A, 40B extend along the direction of elongation along the longitudinal direction X-X' at substantially the same height. The central part 36A, 36B is lowered relative to the end parts 32A, 32B, 40A, 40B, ie it extends to a height lower than the height of the end parts. The central part 36A, 36B extends along the direction of elongation along the longitudinal direction X-X'. The first and second inclined sections 34A, 34B, 38A, 38B join the central part 36A, 36B respectively to the first end part 32A, 32B and to the second end part 40A, 40B.

Selon un mode de réalisation, chaque premier et deuxième tronçon incliné 34A, 34B, 38A, 38B présente une forme courbée. Par exemple, chaque premier et deuxième tronçon incliné 34A, 34B, 38A, 38B forme un « S » suivant la direction d'allongement dans un plan formé par la direction longitudinale X-X' et la direction d'élévation Z-Z', l'une des extrémités du S étant liée à une partie d'extrémité 32A, 32B, 40A, 40B et l'autre extrémité du S étant liée à la partie centrale 36A, 36B.According to one embodiment, each first and second inclined section 34A, 34B, 38A, 38B has a curved shape. For example, each first and second inclined section 34A, 34B, 38A, 38B forms an "S" along the direction of elongation in a plane formed by the longitudinal direction X-X' and the elevation direction Z-Z', the one of the ends of the S being linked to an end part 32A, 32B, 40A, 40B and the other end of the S being linked to the central part 36A, 36B.

Le bogie 10 comprend en outre, selon l'exemple de la figure 1, la première traverse 42A s'étendant suivant une direction d'allongement selon la direction transversale Y-Y' et la deuxième traverse 42B s'étendent suivant la direction d'allongement sensiblement parallèlement à la première traverse 42A.The bogie 10 further comprises, according to the example of figure 1 , the first crosspiece 42A extending along a direction of elongation along the direction transverse YY' and the second crosspiece 42B extend along the direction of elongation substantially parallel to the first crosspiece 42A.

La première et deuxième traverse 42A, 42B relient respectivement les premier et deuxième longerons 30A, 30B entre eux. En particulier, la première traverse 42A relie le premier tronçon incliné 34A avec le premier tronçon incliné 34B correspondant du deuxième longeron 30B et la deuxième traverse 42B relie le deuxième tronçon incliné 38A avec le deuxième tronçon incliné 38B correspondant du deuxième longeron 30B.The first and second crosspieces 42A, 42B respectively connect the first and second beams 30A, 30B to each other. In particular, the first crosspiece 42A connects the first inclined section 34A with the corresponding first inclined section 34B of the second spar 30B and the second crosspiece 42B connects the second inclined section 38A with the corresponding second inclined section 38B of the second spar 30B.

Les longerons 30A, 30B et les traverses 42A, 42B présentent par exemple des sections rectangulaires dans un plan orthogonal à leur direction d'allongement.The side members 30A, 30B and the crosspieces 42A, 42B have, for example, rectangular sections in a plane orthogonal to their direction of elongation.

En variante, les longerons 30A, 30B et les traverses 42A, 42B 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. Une telle forme de la section des traverses 42A, 42B et des longerons 30A, 30B leur confère une plus faible résistance en flexion, ce qui augmente la flexibilité du châssis 12.As a variant, the beams 30A, 30B and the crosspieces 42A, 42B have an I-shaped section in a plane orthogonal to their direction of elongation. By this, it is meant that their section in this plane has a shape comprising a main section extending in the direction of elevation Z-Z' and two transverse sections connected to the ends of the main section in their respective environments, the transverse sections being orthogonal to the main section. Such a shape of the section of the crosspieces 42A, 42B and the side members 30A, 30B gives them a lower bending resistance, which increases the flexibility of the frame 12.

Selon d'autres variantes, les traverses 42A, 42B et les longerons 30A, 30B présentent une section en forme de L, en forme de T, en forme de Z, ou une autre forme leur conférant une résistance en flexion adaptée.According to other variants, the crosspieces 42A, 42B and the side members 30A, 30B have an L-shaped, T-shaped, Z-shaped section, or another shape giving them suitable resistance to bending.

Les premier et deuxième longerons 30A, 30B et les première et deuxième traverses 42A, 42B délimitent entre eux un espace central 44 du bogie 10. L'espace central 44 présente une section sensiblement rectangulaire dans un plan sensiblement orthogonal à la direction d'élévation Z-Z'.The first and second longitudinal members 30A, 30B and the first and second crosspieces 42A, 42B delimit between them a central space 44 of the bogie 10. The central space 44 has a substantially rectangular section in a plane substantially orthogonal to the direction of elevation Z -Z'.

Selon le premier mode de réalisation représenté sur la figure 1, le bogie 10 comprend deux suspensions secondaires 22 disposées à l'intérieur de l'espace central 44.According to the first embodiment shown in the figure 1 , the bogie 10 comprises two secondary suspensions 22 arranged inside the central space 44.

Chaque suspension secondaire 22 est configurée pour relier le bogie 10 à la caisse de véhicule. En particulier, la hauteur d'au moins une partie de la suspension secondaire 22 est inférieure ou égale à la hauteur minimale du châssis 12 selon la direction d'élévation Z-Z'. Par exemple, comme visible en particulier sur la figure 3, la hauteur par rapport aux rails R de la suspension secondaire 22 est sensiblement égale à la hauteur du châssis 12.Each secondary suspension 22 is configured to connect the bogie 10 to the vehicle body. In particular, the height of at least part of the secondary suspension 22 is less than or equal to the minimum height of the frame 12 in the elevation direction Z-Z'. For example, as seen in particular on the picture 3 , the height relative to the rails R of the secondary suspension 22 is substantially equal to the height of the chassis 12.

Chaque suspension secondaire 22 comprend, selon l'exemple de la figure 1, une paire de ressorts 45. Chaque ressort 45 comprend par exemple un ressort hélicoïdal. En complément, chaque suspension secondaire 22 comprend, pour chaque ressort 45, un ressort supplémentaire 48 disposé dans un espace intérieur défini par le ressort 45.Each secondary suspension 22 comprises, according to the example of figure 1 , a pair of springs 45. Each spring 45 comprises for example a coil spring. In complement, each secondary suspension 22 comprises, for each spring 45, an additional spring 48 disposed in an interior space defined by the spring 45.

Selon une variante, chaque suspension secondaire 22 comprend au moins un vérin.According to a variant, each secondary suspension 22 comprises at least one cylinder.

Le bogie 10 comprend en outre par exemple deux dispositifs de support 46 configurés pour supporter les suspensions secondaires 22.The bogie 10 further comprises, for example, two support devices 46 configured to support the secondary suspensions 22.

Chaque dispositif de support 46 comprend par exemple un matériau présentant une dureté de matériau plus élevée que celle d'un matériau du châssis 12. Par « dureté de matériau », il est entendu par exemple la dureté Rockwell du matériau.Each support device 46 comprises for example a material having a higher material hardness than that of a material of the frame 12. By “material hardness”, it is understood for example the Rockwell hardness of the material.

Chaque dispositif de support 46 présente par exemple une forme de baignoire ou berceau. Chaque dispositif de support 46 comprend une surface de support 50, une surface inférieure 51 (visible notamment sur la figure 3) et des parois verticales 52, reliées par la surface de support 50 à l'une de leurs extrémité, leur autre extrémité définissant une ouverture par le haut. Le dispositif de support 46 peut éventuellement comprendre une ouverte latérale selon la direction transversale Y-Y'. La surface de support 50 est configurée pour supporter les suspensions secondaires 22.Each support device 46 has for example the shape of a bathtub or cradle. Each support device 46 comprises a support surface 50, a lower surface 51 (visible in particular on the picture 3 ) and vertical walls 52, connected by the support surface 50 at one of their ends, their other end defining an opening from the top. The support device 46 may optionally include a side opening in the transverse direction Y-Y'. The support surface 50 is configured to support the secondary suspensions 22.

En particulier, une extrémité inférieure de chaque suspension secondaire 22 repose sur la surface de support 50. Chaque suspension secondaire 22 s'étend selon un axe sensiblement perpendiculaire à surface de support 50. Comme représenté en particulier sur la figure 3, chaque suspension secondaire 22 s'étend selon la direction d'élévation Z-Z'. Une extrémité supérieure de chaque suspension secondaire 22 est connectée au plancher 11 de la caisse de véhicule. La caisse repose ainsi, par l'intermédiaire des suspensions secondaires 22, sur la surface de support 50.In particular, a lower end of each secondary suspension 22 rests on the support surface 50. Each secondary suspension 22 extends along an axis substantially perpendicular to the support surface 50. As shown in particular on the picture 3 , each secondary suspension 22 extends in the direction of elevation Z-Z'. An upper end of each secondary suspension 22 is connected to the floor 11 of the vehicle body. The body thus rests, via the secondary suspensions 22, on the support surface 50.

Afin d'obtenir un plancher 11 abaissé sur l'ensemble de la surface du plancher, le dispositif de support 46 est particulièrement proche des rails R. A cause des éventuels mouvements verticaux du bogie 10 par rapport aux rails R, la surface inférieure 51 doit s'étendre sensiblement parallèlement aux rails R, afin d'éviter d'interférer avec le gabarit G. Par exemple, la surface inférieure 51 est une surface usinée. Cela permet d'obtenir un espace défini entre la surface inférieure 51 et les rails R.In order to obtain a floor 11 lowered over the entire surface of the floor, the support device 46 is particularly close to the rails R. Because of the possible vertical movements of the bogie 10 with respect to the rails R, the lower surface 51 must extend substantially parallel to the rails R, in order to avoid interfering with the template G. For example, the lower surface 51 is a machined surface. This provides a defined space between the lower surface 51 and the rails R.

Par exemple, la surface de support 50 est également une surface usinée. Cela permet de minimiser l'épaisseur du dispositif de support 46 selon la direction d'élévation Z-Z', tout en assurant une rigidité suffisante du dispositif de support 46 pour supporter le poids de la caisse de véhicule.For example, support surface 50 is also a machined surface. This makes it possible to minimize the thickness of the support device 46 in the direction of elevation Z-Z′, while ensuring sufficient rigidity of the support device 46 to support the weight of the vehicle body.

Le fait de disposer de surfaces usinées permet ainsi de diminuer la hauteur de la suspension secondaire 22 par rapport au rail R. Par exemple, cela permet de diminuer la hauteur de la suspension secondaire 22 par rapport au rail R de 5 mm. En d'autres termes, grâce aux surfaces usinées, le dispositif de support 46 est très proche du gabarit G des parties basses. Par exemple, le dispositif de support 46 est disposé à une hauteur de 10 mm par rapport au gabarit G.The fact of having machined surfaces thus makes it possible to reduce the height of the secondary suspension 22 with respect to the rail R. For example, this makes it possible to reduce the height of the secondary suspension 22 with respect to the rail R by 5 mm. In other terms, thanks to the machined surfaces, the support device 46 is very close to the gauge G of the lower parts. For example, the support device 46 is arranged at a height of 10 mm with respect to the template G.

Chaque dispositif de support 46 comprend en outre deux extrémités d'appui 54 configurées pour relier le dispositif de support 46 aux première et deuxième traverses 42A, 42B par l'intermédiaire d'une pluralité de dispositifs amortisseurs 56. Notamment, chaque extrémité d'appui 54 est configurée pour reposer sur une surface supérieure de la première ou deuxième traverse 42A, 42B, par l'intermédiaire des dispositifs amortisseurs 56.Each support device 46 further comprises two support ends 54 configured to connect the support device 46 to the first and second crosspieces 42A, 42B via a plurality of damping devices 56. In particular, each support end 54 is configured to rest on an upper surface of the first or second crosspiece 42A, 42B, via the damping devices 56.

Chaque dispositif amortisseur 56 est configuré pour atténuer une transmission de vibrations du châssis 12 vers les suspensions secondaires 22 et ainsi vers la caisse. Chaque dispositif amortisseur 56 comprend par exemple un élément élastique, tel qu'un plot en caoutchouc.Each damping device 56 is configured to attenuate a transmission of vibrations from the chassis 12 to the secondary suspensions 22 and thus to the body. Each damping device 56 comprises for example an elastic element, such as a rubber stud.

Par exemple, le dispositif de support 46 est relié au châssis 12 par quatre dispositifs amortisseurs 56. Chaque dispositif amortisseur 56 est par exemple fixé par au moins une vis 58 (visible en particulier à la figure 3) au châssis 12, et en particulier à la première ou deuxième traverse 42A, 42B.For example, the support device 46 is connected to the frame 12 by four damping devices 56. Each damping device 56 is for example fixed by at least one screw 58 (visible in particular at the picture 3 ) to the frame 12, and in particular to the first or second crosspiece 42A, 42B.

Le fait de disposer des dispositifs amortisseurs 56 entre le dispositif de support 46 et le châssis 12 permet de diminuer la hauteur de la suspension secondaire 22 par rapport au rail R. Par exemple, des moyens amortissants placés, selon la direction d'élévation, au-dessus ou en dessous des ressorts 45 ne sont pas nécessaires, des vibrations du châssis 12 étant atténuées par les dispositifs amortisseurs 56 qui s'étendent de part et d'autre de la suspension secondaire et n'ajoutent donc pas à l'encombrement du bogie selon la direction d'élévation.The fact of arranging damping devices 56 between the support device 46 and the frame 12 makes it possible to reduce the height of the secondary suspension 22 with respect to the rail R. For example, damping means placed, in the direction of elevation, at the -above or below the springs 45 are not necessary, vibrations of the chassis 12 being attenuated by the damping devices 56 which extend on either side of the secondary suspension and therefore do not add to the bulk of the bogie in the elevation direction.

Selon une variante, le dispositif de support 46 est relié au châssis 12 par l'intermédiaire d'au moins une articulation élastique (non représenté).According to a variant, the support device 46 is connected to the frame 12 via at least one elastic joint (not shown).

Un deuxième mode de réalisation du bogie 110 est représenté sur la figure 2. Dans ce deuxième mode de réalisation, les éléments correspondants du premier mode de réalisation ne sont pas décrits à nouveau. Les éléments correspondants comprennent les mêmes références que dans le premier mode de réalisation, majorés de 100. Par exemple, le bogie 10 du premier mode de réalisation est référencé comme bogie 110 dans le deuxième mode de réalisation.A second embodiment of the bogie 110 is represented on the picture 2 . In this second embodiment, the corresponding elements of the first embodiment are not described again. The corresponding elements include the same references as in the first embodiment, increased by 100. For example, bogie 10 of the first embodiment is referenced as bogie 110 in the second embodiment.

Selon le deuxième mode de réalisation, le bogie 110 comprend quatre moteurs 120A, 120B, 120C et 120D. Chaque moteur 120A, 120B, 120C et 120D est connecté à une roue 118 correspondante et configuré pour entraîner cette roue 118.According to the second embodiment, the bogie 110 comprises four motors 120A, 120B, 120C and 120D. Each motor 120A, 120B, 120C and 120D is connected to a corresponding wheel 118 and configured to drive this wheel 118.

Les suspensions secondaires 122 sont positionnées à l'extérieur de l'espace central 144 selon la direction transversale Y-Y'. Par exemple, la première suspension secondaire 122 est positionnée entre deux roues 118 d'un premier côté latéral du bogie 110, et la deuxième suspension secondaire 122 est positionnée entre deux roues 118 d'un deuxième côté latéral du bogie 110 opposé au premier côté.The secondary suspensions 122 are positioned outside the central space 144 in the transverse direction Y-Y'. For example, the first secondary suspension 122 is positioned between two wheels 118 on a first lateral side of the bogie 110, and the second secondary suspension 122 is positioned between two wheels 118 on a second lateral side of the bogie 110 opposite the first side.

Selon le deuxième mode de réalisation, les première et deuxième traverses 142A, 142B comprennent des extrémités allongées 147 dépassant les longerons 130A, 130B selon la direction transversale Y-Y'. Chaque extrémité allongée 147 est configurée pour supporter un dispositif de support 146.According to the second embodiment, the first and second crosspieces 142A, 142B comprise elongated ends 147 extending beyond the side members 130A, 130B in the transverse direction Y-Y'. Each elongated end 147 is configured to support a support device 146.

Selon un exemple, chaque extrémité allongée 147 comprend une structure distincte de la traverse 142A, 142B correspondante, la structure distincte étant reliée à la traverse 142A, 142B correspondante.According to one example, each elongated end 147 comprises a separate structure from the corresponding crosspiece 142A, 142B, the separate structure being connected to the corresponding crosspiece 142A, 142B.

Sur la figure 3, pour des raisons de visibilité, uniquement des références du premier mode de réalisation sont représentées. On notera que les références correspondantes du deuxième mode de réalisation sont également applicables à la figure 3.On the picture 3 , for reasons of visibility, only references of the first embodiment are shown. It will be noted that the corresponding references of the second embodiment are also applicable to the picture 3 .

Le plancher 11 du véhicule ferroviaire est positionné à une hauteur H par rapport au rail R. La hauteur H se compose, selon la direction d'élévation Z-Z', de la somme d'une première hauteur H1, d'une deuxième hauteur H2, d'une troisième hauteur H3 et d'une quatrième hauteur H4. La première hauteur H1 est la distance entre le rail R et la surface inférieure 51 du dispositif de support 46. La deuxième hauteur H2 est l'épaisseur du dispositif de support 46 selon la direction d'élévation Z-Z'. En d'autres termes, la deuxième hauteur H2 est la distance selon la direction d'élévation Z-Z' entre la surface de support 50 et la surface inférieure 51. La troisième hauteur H3 est la hauteur de la suspension secondaire 22. La quatrième hauteur H4 est l'épaisseur du plancher 11 selon la direction d'élévation Z-Z'.The floor 11 of the railway vehicle is positioned at a height H relative to the rail R. The height H is made up, according to the direction of elevation Z-Z', of the sum of a first height H1, of a second height H2, a third height H3 and a fourth height H4. The first height H1 is the distance between the rail R and the lower surface 51 of the support device 46. The second height H2 is the thickness of the support device 46 in the elevation direction Z-Z'. In other words, the second height H2 is the distance in the elevation direction Z-Z' between the support surface 50 and the lower surface 51. The third height H3 is the height of the secondary suspension 22. The fourth height H4 is the thickness of floor 11 in elevation direction Z-Z'.

La hauteur H est par exemple comprise entre 350 mm et 380 mm, voir environ 420 mm via une légère pente depuis un couloir central, situé, lui, entre 350 et 380 mm au-dessus du rail.The height H is for example between 350 mm and 380 mm, or even about 420 mm via a slight slope from a central corridor, located between 350 and 380 mm above the rail.

Par exemple en fonction des exigences de construction du dispositif de support 46, des suspensions secondaires 22 et du plancher 11, les hauteurs sont choisies comme suit :

  • H1 = 75 mm ;
  • H2 = 25 mm ;
  • H3 = 230 mm, et
  • H4 = 50 mm.
For example, depending on the construction requirements of the support device 46, the secondary suspensions 22 and the floor 11, the heights are chosen as follows:
  • H1=75mm;
  • H2=25mm;
  • H3 = 230mm, and
  • H4=50mm.

Par exemple, la surface inférieure 51 du dispositif de support 46 s'étend ainsi à une distance inférieure ou égale à 75 mm par rapport au rail R. En outre, la surface inférieure 51 présente une distance D à la partie supérieure du gabarit G des parties basses sensiblement égale à 15 mm, le gabarit se situant habituellement à 60 mm du rail (hauteur H0).For example, the lower surface 51 of the support device 46 thus extends at a distance less than or equal to 75 mm with respect to the rail R. In addition, the lower surface 51 has a distance D to the upper part of the template G of the lower parts substantially equal to 15 mm, the template usually being 60 mm from the rail (height H0).

Comme visible en particulier sur la figure 3, la hauteur d'au moins une partie de chaque suspension secondaire 22 est ainsi inférieure ou égale à une hauteur minimale du châssis 12 selon la direction d'élévation Z-Z'. Si E est la distance qui sépare la partie inférieure du châssis de bogie 12 du gabarit G, avec E généralement égale à 55 mm, alors la hauteur minimale du châssis 12 par rapport au rail R est par exemple sensiblement égale à H0 + E = 115 mm. En particulier, la hauteur d'au moins une partie de chaque suspension secondaire 22 est ainsi inférieure ou égale à la hauteur minimale des premier et deuxième traverses 42A, 42B selon la direction d'élévation Z-Z'. En outre, la hauteur d'au moins une partie de chaque suspension secondaire 22 est inférieure ou égale à la hauteur minimale des premier et deuxième longerons 30A, 30B.As seen in particular on the picture 3 , the height of at least part of each secondary suspension 22 is thus less than or equal to a minimum height of the frame 12 in the direction of elevation Z-Z'. If E is the distance which separates the lower part of the bogie frame 12 from the gauge G, with E generally equal to 55 mm, then the minimum height of the frame 12 with respect to the rail R is for example substantially equal to H0 + E = 115 mm. In particular, the height of at least part of each secondary suspension 22 is thus less than or equal to the minimum height of the first and second crosspieces 42A, 42B in the elevation direction Z-Z'. In addition, the height of at least a part of each secondary suspension 22 is less than or equal to the minimum height of the first and second beams 30A, 30B.

Notamment, la hauteur minimale du châssis 12 est une hauteur minimale du châssis par rapport au rail R sur lequel le bogie 10 est destiné à circuler.In particular, the minimum height of the chassis 12 is a minimum height of the chassis relative to the rail R on which the bogie 10 is intended to travel.

Par exemple, lors d'une usure des roues 18, la hauteur H0 + E du châssis 12 par rapport aux rails R est réduite. Du fait que le dispositif de support 46 est connecté au châssis 12, la hauteur H1 du dispositif de support 46 est également réduite.For example, during wear of the wheels 18, the height H0+E of the frame 12 relative to the rails R is reduced. Because the support device 46 is connected to the frame 12, the height H1 of the support device 46 is also reduced.

Notamment, le dispositif de support 46 et le châssis 12 sont deux pièces distinctes. Le dispositif de support 46 s'étend en particulier à une hauteur inférieure à celle du châssis 12.In particular, the support device 46 and the frame 12 are two separate parts. The support device 46 extends in particular to a height lower than that of the frame 12.

La hauteur du dispositif de support 46 par rapport au châssis 12 est adaptable selon la direction d'élévation Z-Z', par exemple en fonction de l'usure des roues 18. Par exemple, le bogie 10 est adapté pour recevoir une ou plusieurs pièces de réglage entre les extrémités d'appui 54 et les traverses 42A, 42B pour maintenir la hauteur H1 constante bien que la hauteur du châssis 12 soit réduite. Par exemple, par ajout d'une pièce de réglage, la hauteur du dispositif de support 46 par rapport au rail R est maintenue. La pièce de réglage est par exemple une cale ou un coussin élastique additionnel formant un dispositif amortisseur comme décrit précédemment.The height of the support device 46 relative to the frame 12 is adaptable according to the direction of elevation Z-Z', for example according to the wear of the wheels 18. For example, the bogie 10 is adapted to receive one or more adjustment pieces between the bearing ends 54 and the crosspieces 42A, 42B to keep the height H1 constant although the height of the frame 12 is reduced. For example, by adding an adjustment piece, the height of the support device 46 relative to the rail R is maintained. The adjustment part is for example a wedge or an additional elastic cushion forming a damping device as described above.

Les suspensions secondaires 22 reposant sur le dispositif de support 46, la hauteur des suspensions secondaires 22 est ainsi réglable de manière indépendante de la hauteur du châssis 12.The secondary suspensions 22 resting on the support device 46, the height of the secondary suspensions 22 is thus adjustable independently of the height of the frame 12.

Par exemple, lors d'une usure des roues 18, la hauteur du châssis 12 par rapport aux rails R est réduite. Pour maintenir une hauteur nécessaire du dispositif de support 46 par rapport aux rails R, la hauteur du dispositif de support 46 est ainsi augmentée.For example, during wear of the wheels 18, the height of the frame 12 relative to the rails R is reduced. To maintain a necessary height of the support device 46 relative to the rails R, the height of the support device 46 is thus increased.

Le fait que la hauteur du dispositif de support 46 est adaptable permet d'éviter, lors d'une usure des roues 18, que le dispositif de support 46 s'étende sous la partie inférieure du gabarit du véhicule ferroviaire et puisse ainsi interférer avec le gabarit G des parties basses ou avec des éléments s'étendant sur les voies sur lesquelles circulent le véhicule ferroviaire.The fact that the height of the support device 46 is adaptable makes it possible to avoid, during wear of the wheels 18, that the support device 46 extends under the lower part of the gauge of the railway vehicle and can thus interfere with the gauge G of the lower parts or with elements extending over the tracks on which the railway vehicle travels.

En même temps, le fait de positionner chaque suspension secondaire 22 à une hauteur inférieure ou égale à une hauteur minimale des premier et deuxième longerons 30A, 30B permet d'abaisser le plancher 11. Par exemple, le bogie 10, 110 permet de disposer au moins douze sièges au droit du bogie 10, 110 sur un même étage, et d'obtenir une caisse comprenant un plancher abaissé, s'étendant sensiblement au même niveau sur tout l'étage.At the same time, the fact of positioning each secondary suspension 22 at a height less than or equal to a minimum height of the first and second side members 30A, 30B makes it possible to lower the floor 11. For example, the bogie 10, 110 makes it possible to have the least twelve seats to the right of the bogie 10, 110 on the same floor, and to obtain a body comprising a lowered floor, extending substantially at the same level over the entire floor.

Les bogies décrits ci-dessus sont des bogies motorisés. Il est cependant entendu que l'invention peut également s'appliquer à des bogies dépourvus de moteurs.The bogies described above are motorized bogies. It is however understood that the invention can also be applied to bogies without motors.

Claims (10)

  1. A bogie (10, 110) for a railway vehicle comprising:
    - a bogie frame (12, 112);
    - at least one pair of wheels (18, 118) rotatable relative to the frame (12, 112), and
    - at least one secondary suspension (22, 122) configured to connect the bogie (10, 110) to a vehicle body,
    the frame (12, 112) comprising at least one first longitudinal member (30A, 130A) extending substantially in a longitudinal direction, at least one second longitudinal member (30B, 130B) extending substantially parallel to the first longitudinal member (30A, 130A), at least one first cross-member (42A, 142A) and at least one second cross-member (42B, 142B) each extending in a transverse direction substantially perpendicular to the longitudinal direction, the first and second cross-members (42A, 42B, 142A, 142B) respectively connecting the first and second longitudinal members (30A, 30B, 130A, 130B) to one another,
    characterised in that the height of at least part of the secondary suspension (22, 122) is less than a minimum height of the chassis (12, 112) in a direction of elevation substantially perpendicular to the longitudinal direction and to the transverse direction, the heights being measured with respect to the rails (R) on which the bogie is intended to travel.
  2. The bogie (10, 110) according to claim 1, wherein the first and second longitudinal members (30A, 30B, 130A, 130B) and the first and second cross-members (42A, 42B, 142A, 142B) define between them a central space (44, 144) of the bogie (10, 110).
  3. The bogie (10, 110) according to claim 2, wherein each secondary suspension (22, 122) is disposed outside or inside the central space (44, 144) in the transverse direction.
  4. The bogie (10, 110) according to any of claims 1 to 3, wherein the secondary suspension (22, 122) comprises at least one pair of springs (45, 145).
  5. The bogie (10, 110) according to any one of claims 1 to 4, wherein the bogie (10, 110) further comprises at least one support device (46, 146) comprising a support surface (50) supporting the secondary suspension (22, 122).
  6. The bogie (10, 110) according to claim 5, wherein the height of the support device (46, 146) relative to the frame (12, 112) is adaptable according to the elevation direction.
  7. The bogie (10, 110) according to claim 5 or 6, wherein the support device (46, 146) comprises a material having a higher material hardness than a material of the frame (12, 112).
  8. The bogie (10, 110) according to any one of claims 5 to 7, wherein the support device (46) comprises a bottom surface (51) extending at a distance (H1) less than or equal to 75 mm from a rail (R) on which the bogie (10, 110) is intended to travel.
  9. The bogie (10, 110) according to any one of claims 5 to 8, wherein the support device (46, 146) is connected to the frame (12, 112) via at least one damping device (56).
  10. A railway vehicle comprising at least one bogie (10, 110) according to any of claims 1 to 9, and at least one vehicle body, the secondary suspension (22, 122) extending between the bogie (10, 110) and the vehicle body.
EP19207181.9A 2018-11-06 2019-11-05 Bogie and railway vehicle Active EP3650305B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1860195A FR3088043B1 (en) 2018-11-06 2018-11-06 BOGIE AND RAIL VEHICLE

Publications (2)

Publication Number Publication Date
EP3650305A1 EP3650305A1 (en) 2020-05-13
EP3650305B1 true EP3650305B1 (en) 2023-02-22

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ID=65685667

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Application Number Title Priority Date Filing Date
EP19207181.9A Active EP3650305B1 (en) 2018-11-06 2019-11-05 Bogie and railway vehicle

Country Status (4)

Country Link
EP (1) EP3650305B1 (en)
ES (1) ES2943496T3 (en)
FI (1) FI3650305T3 (en)
FR (1) FR3088043B1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1605080C2 (en) * 1967-07-22 1974-03-28 Kloeckner-Humboldt-Deutz Ag, 5000 Koeln Low-wear bogie for high-speed rail vehicles
ES2078137B1 (en) * 1992-09-30 1996-08-16 Invastesa BOGIES FOR RAILWAY VEHICLES WITH VARIABLE SEPARATION BETWEEN WHEELS.
FR2914609B1 (en) * 2007-04-05 2009-07-10 Alstom Transport Sa BOGIE FOR RAILWAY VEHICLE
CN203528494U (en) * 2013-10-29 2014-04-09 西南交通大学 Low-floor train radial bogie
KR101731105B1 (en) * 2015-10-16 2017-04-28 한국철도기술연구원 Low floor vehicle for tram train

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Publication number Publication date
EP3650305A1 (en) 2020-05-13
FR3088043B1 (en) 2020-12-04
FR3088043A1 (en) 2020-05-08
FI3650305T3 (en) 2023-05-05
ES2943496T3 (en) 2023-06-13

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