EP3974283B1 - Railway vehicle bogie and associated vehicle - Google Patents

Railway vehicle bogie and associated vehicle Download PDF

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Publication number
EP3974283B1
EP3974283B1 EP21198573.4A EP21198573A EP3974283B1 EP 3974283 B1 EP3974283 B1 EP 3974283B1 EP 21198573 A EP21198573 A EP 21198573A EP 3974283 B1 EP3974283 B1 EP 3974283B1
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EP
European Patent Office
Prior art keywords
bogie
axle
elastic member
arm
railway vehicle
Prior art date
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Active
Application number
EP21198573.4A
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German (de)
French (fr)
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EP3974283A1 (en
Inventor
Laurent Cichy
Cyril Florent Costes
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Alstom Holdings SA
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Alstom Transport Technologies SAS
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Publication of EP3974283A1 publication Critical patent/EP3974283A1/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
    • 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
    • B61F5/26—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
    • B61F5/301—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes 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
    • B61F15/00—Axle-boxes

Definitions

  • Railway vehicle bogies are suitable for maintaining movable axles in rotation relative to a vehicle body.
  • the railway vehicle bogies are further adapted to ensure the comfort of users located in the vehicle body and/or to ensure the durability of the structure of the vehicle body by absorbing the shocks transmitted from the axles to the vehicle body .
  • the bogies of railway vehicles can comprise a frame and an arm carrying an axle box, the axle being guided in rotation with respect to the axle box and the movement of the arm being damped with respect to the frame.
  • At least one elastic member connects in particular the arm and the chassis, the group or groups of springs thus ensuring a damped transmission of shocks from the axle to the vehicle body.
  • the primary suspension comprises one primary spring per wheel, placed in a receiving cavity above the axle box.
  • the primary suspension comprises two primary springs per wheel without receiving cavities.
  • An object of the invention is then to propose a bogie offering a restricted vertical bulk and high characteristics in terms of damping.
  • the subject of the invention is a vehicle bogie according to claim 1.
  • a bogie in which the chassis comprises, for each elastic member, a cavity for receiving the spring is particularly advantageous, since it allows the installation of very long springs, in a suspension having a limited vertical space.
  • the railway vehicle bogie also has one or more of the characteristics of claims 2 to 8, taken separately or in any technically possible combination(s). ).
  • the invention further relates to a railway vehicle according to claim 9.
  • top and bottom or “lower” and “upper” are understood with reference to the vertical direction of the railway vehicle.
  • front refer to the longitudinal direction of the rail vehicle.
  • a railway vehicle 10 comprises a bogie 14.
  • the railway vehicle 10 further comprises a vehicle body mounted on the bogie 14 (not shown).
  • the railway vehicle 10 is for example a car intended to travel on rails.
  • the railway vehicle 10 is for example a locomotive or a car of a tram, a metro or a railcar.
  • the bogie 14 comprises a frame 22, at least one axle 12, at least one axle box 24 internally receiving the at least one axle 12, and a suspension of the axle box on the frame 22.
  • Axle 12 includes body 15, and wheels (not shown) mounted on body 15.
  • the body 15 is typically rotatable about a transverse axis of rotation C-C'.
  • a part 16 of the axle body 15 is received in the axle box 24.
  • the axle box 24 typically includes a link 20, such as a bearing, which guides the axle body 15 in rotation around the axis of rotation CC' with respect to the frame 22.
  • the suspension comprises an arm 26, an articulation 28 connecting the arm 26 to the frame 22, and at least one elastic member 30.
  • the bogie 14 preferably further comprises a shock absorber (not shown).
  • the frame 22 comprises, for the or each elastic member 30, a cavity 34 for receiving said elastic member 30.
  • the frame 22 comprises a first cavity 35 and a second cavity 36.
  • Each cavity 34 includes an opening 37 and a bottom 38.
  • Each bottom 38 cooperates with an elastic member 30.
  • an upper end of the elastic member 30 is engaged in the cavity 34 through the opening 37 and bears against the bottom 38.
  • the opening 37 is offset from the bottom 38.
  • the bottom 38 is for example offset vertically upwards relative to the opening 37.
  • the opening 37 extends for example along a plane parallel to a plane in which the bottom 38 extends.
  • the opening 37 is for example of circular shape.
  • the frame 22 comprises a hollow beam 40.
  • the hollow spar 40 comprises, and is delimited by, a lower wall 42 and an upper wall 44.
  • the hollow spar 40 preferably extends in the longitudinal direction.
  • the hollow spar 40 comprises at least three reinforcements 46.
  • the lower wall 42 and the upper wall 44 form, for example, plates elongated in the longitudinal direction and extending substantially parallel to each other.
  • the bottom wall 42 is for example a sheet with a thickness of between 12 mm and 20 mm.
  • the upper wall 44 extends for example substantially horizontally.
  • the upper wall 44 is for example a sheet with a thickness of between 10 mm and 18 mm.
  • the distance between the upper wall 44, and more particularly the top of the upper wall 44, relative to the axis of rotation C-C' is for example between 350mm and 410mm.
  • Each reinforcement 46 extends between the lower wall 42 and the upper wall 44 and connects the lower wall 42 and the upper wall 44. Each reinforcement 46 extends for example substantially vertically. Each reinforcement 46 is for example a sheet with a thickness of between 10 mm and 16 mm.
  • the opening 37 of the cavity 34 is formed in the lower wall 42 and the bottom 38 of the cavity 34 is defined by the upper wall 44.
  • the reinforcements 46 then advantageously define an internal contour of the cavity 34 connecting the opening 37 to the bottom 38 of the cavity 34.
  • the walls 42, 44 and the reinforcements 46 defining the cavity 34 are made from a single part, for example molded.
  • the two cavities can advantageously be made in one or two castings (or any other advantageous combination of castings, forgings or flat products).
  • the frame 22 comprises a first abutment region 49, adapted to come into contact with the arm 26 and to limit the movement of the arm 26 relative to the frame 22.
  • Articulation 28 connects arm 26 to frame 22. Articulation 28 is in particular adapted to allow rotation of arm 26 relative to frame 22, preferably over a range of rotation less than ⁇ 6°.
  • the arm 26 comprises an upper face 51 arranged facing the frame 22, and a lower face 50 arranged opposite the upper face 51.
  • the arm 26 includes a free end 52 opposite a connector end 54, connector end 54 in which it is connected to the frame 22 by the joint 28.
  • the arm 26 extends between the free end 52 and the end connector 54.
  • the arm 26 is preferably elongated between the free end 52 and the connector end 54, that is to say that the large dimension of the arm 26 extends substantially along the direction formed between the free end 52 and the connecting end 54.
  • the arm 26 includes at least one bearing region 58.
  • the or each support region 58 is preferably formed on the upper face 51 of the arm 26.
  • the or each support region 58 is in particular formed facing an opening 37 of a cavity 34.
  • the or each support region 58 is offset longitudinally forwards or backwards with respect to the axle box 24.
  • the arm 26 comprises a support region offset forwards 62 and a support region offset rearwards 60 with respect to the axle box 24.
  • the rear support region 60 is offset towards the connection end 54; and front bearing region 62 is offset toward free end 52.
  • Each support region 58 cooperates with an elastic member 30.
  • the elastic member 30 has a lower end resting on one of or the support region 58.
  • Each bearing region 58 extends for example substantially along a horizontal plane. Each bearing region 58 preferably extends vertically at or slightly above the axis of rotation C-C' of the axle 12 with respect to the bogie 14. Each bearing region 58 extends in particular between the central axis C-C' and a vertex 63 of the axle box. By top 63 of the axle box 24 is meant here the highest region of the axle box 24.
  • the arm 26 comprises for example a second abutment region 65, arranged facing the first abutment region 49 and adapted to come into contact with the second abutment region 49, in particular to limit the movement of the arm 26 towards the frame 22
  • the second abutment region extends, for example, longitudinally between the support region shifted towards the rear 60 and the support region shifted forwards 62.
  • the arm 26 carries the axle box 24 and, in a particular variant, forms a portion of the axle box 24.
  • the axle box 24 preferably comprises an upper body 66 and a lower body 68.
  • the axle box 24 preferably comprises means 70 for fixing the lower body 68 to the upper body 66.
  • the lower body 68 is connected to the upper body 66.
  • the lower body 68 is fixed to the upper body 66 by removable fixing means 70, the fixing means 70 being for example screws.
  • the fixing means 70 being for example screws.
  • the lower body 68 is for example removable.
  • the upper body 66 extends above the link 20.
  • the upper body 66 is adapted to support the force applied by the railway vehicle 10 on the axle 12.
  • the upper body 66 comprises for example an inner face 72 intended to cooperate with the connection 20.
  • the inner face 72 is for example in the shape of a portion of a cylinder, and more particularly in the shape of a half cylinder.
  • the upper body 66 is preferably defined by the lower face 50 of the arm, a portion of the lower face 50 of the arm then forming the inner face 72 of the upper body 66.
  • the lower body 68 is for example formed by a concave part and comprises an inner face 74 intended to cooperate with the connection 20.
  • the inner face 74 is for example in the shape of a portion of a cylinder, and more particularly in the shape of a half-cylinder.
  • the at least one elastic member 30 comprises at least one spring 76.
  • the bogie comprises two elastic members 30, a first elastic member 78 comprising two concentric springs 76 and a second elastic member 80 comprising only one spring 76.
  • Each spring 76 comprises a lower end 82 and an upper end 84.
  • each elastic member 30 comprises an upper saddle 48 and a lower saddle 64.
  • the upper 48 and lower saddles 64 comprise at least one ring on which is pressed the respectively upper 84 and lower 82 end of the spring 76 and a pin protruding from the center of the ring and being engaged in the spring 76.
  • the upper saddles 48 are fixed at the level of the bottoms 38 and the lower saddles 64 are fixed at the level of support regions 58.
  • the first elastic member 78 bears against the support region offset longitudinally forwards 62 relative to the axle box 24 on the one hand and against the bottom 38 of the first cavity 35 on the other hand.
  • the second elastic member 80 bears against the support region offset longitudinally rearwardly 60 with respect to the axle box 24 on the one hand and against the bottom 38 of the second cavity 36 on the other hand.
  • the axle box 24 is thus arranged longitudinally between the first elastic member 78 and the second elastic member 80.
  • the springs 76 are coil springs.
  • Each spring 76 preferably comprises between 3 and 8 active turns and preferably between 3 and 6 active turns.
  • each spring 76 is preferably between 200 N/mm and 500 N/mm for the first elastic member 78 and between 900 N/mm and 1200 N/mm for the second elastic member 80.
  • each spring 76 is generally not the same for the springs of the first elastic member 78 as for those of the second elastic member 80.
  • each spring 76 is always greater than 220 mm when the springs 76 are installed in the bogie 14.
  • the length of each spring 76 is in particular between 220 mm and 360 mm when the springs are installed in the bogie 14. vacuum of each spring is for example 425mm.
  • each spring 76 of the first elastic member 78 when the spring 76 is installed in the bogie 14, is for example between 300mm and 360mm and the length of each spring 76 of the second elastic member 80, when the spring 76 is installed in the bogie 14, is for example between 220mm and 300mm.
  • each spring 76 is minimal when first abutment region 49 is in contact with second abutment region 65.
  • the damper (not shown) is for example connected on the one hand to the frame 22 and on the other hand to the arm 26.
  • the damper is in particular suitable for damping the movements of the arm 26 with respect to the frame 22.
  • the damper is for example arranged longitudinally between the first elastic member 78 and the second elastic member 80.
  • a bogie 14 as previously described is supplied.
  • the axle 12 is installed in the axle box 24.
  • the lower body 68 is in particular detached from the upper body 66 and the axle 12 is put in place. relative to the bogie 14.
  • the link 20 is for example installed around the axle 12, and the axle provided with the link 20 is installed in the upper body 66, for example in contact with the inner face 72 of the upper body 66
  • the lower body 68 is then brought around the axle 12, and more particularly around the link 20, the lower body 68 and the upper body 66 thus enclosing the axle 12 and the link 20.
  • the lower body 68 is fixed to the upper body 66 to form the axle housing 24 around the axle 12 installed in the upper body 66.
  • the lower body 68 is for example fixed to the upper body 66 by means of the fixing means 70.
  • the fixing means 70 are for example detachable, the lower body 68 thus being removable with respect to the upper body 66, in particular to allow replacement of the axle 12 or part of axle 12.
  • a chassis 22 comprising, for the or each elastic member 30, a cavity 34 for receiving said elastic member 30 allows the use of very long springs 76 without complicating the installation of axles 12 on the bogie 14, while limiting the vertical dimensions of the bogie 14.
  • an arm 26 defining the upper body 66 of the axle box 24 and of a lower body 68 connected to the upper body 66 is particularly advantageous for facilitating the installation of an axle 12 in the bogie 14, the axle 12 can then be installed and / or uninstalled by simple assembly / disassembly of the lower body 68 around the connecting portion 20.
  • a frame 22 comprising a hollow beam 40 defining the cavity 34 is particularly advantageous since it makes it possible to accommodate a significant part of the length of the elastic members 30 (for example between 30% and 50%).
  • the position of the support region 58 is particularly advantageous for obtaining a great length of spring 76 while allowing the use of a lower body 68 which can be easily removed to facilitate the installation of the axle on the bogie 14 or removal of axle 12 from bogie 14.
  • the use of two groups of springs 30 is particularly advantageous since it allows the use of space-saving springs 76 and limits the force applied to the joint 28.

Description

La présente invention concerne un bogie de véhicule ferroviaire, comprenant :

  • un châssis ;
  • au moins un essieu ;
  • au moins une boite d'essieu, recevant intérieurement l'au moins un essieu ;
  • une suspension de la ou chaque boîte d'essieu sur le châssis ;
la suspension comprenant :
  • un bras portant la boîte d'essieu ; et
  • au moins un organe élastique interposé entre le bras et le châssis.
The present invention relates to a railway vehicle bogie, comprising:
  • a chassis ;
  • at least one axle;
  • at least one axle box, internally receiving the at least one axle;
  • a suspension of the or each axle box on the frame;
the suspension comprising:
  • an arm carrying the axle box; And
  • at least one elastic member interposed between the arm and the frame.

Les bogies de véhicules ferroviaires sont adaptés pour maintenir des essieux mobiles en rotation par rapport à un corps de véhicule. Les bogies de véhicule ferroviaires sont en outre adaptés pour assurer le confort d'utilisateurs se trouvant dans le corps de véhicule et/ou pour assurer la durabilité de la structure du corps de véhicule en amortissant les chocs transmis depuis les essieux vers le corps de véhicule.Railway vehicle bogies are suitable for maintaining movable axles in rotation relative to a vehicle body. The railway vehicle bogies are further adapted to ensure the comfort of users located in the vehicle body and/or to ensure the durability of the structure of the vehicle body by absorbing the shocks transmitted from the axles to the vehicle body .

A cet effet, les bogies de véhicules ferroviaires peuvent comprendre un châssis et un bras portant une boite d'essieu, l'essieu étant guidé en rotation par rapport à la boite d'essieu et le déplacement du bras étant amorti par rapport au châssis. Au moins un organe élastique connecte notamment le bras et le châssis, le ou les groupements de ressorts assurant ainsi une transmission amortie des chocs depuis l'essieu vers le corps de véhicule.To this end, the bogies of railway vehicles can comprise a frame and an arm carrying an axle box, the axle being guided in rotation with respect to the axle box and the movement of the arm being damped with respect to the frame. At least one elastic member connects in particular the arm and the chassis, the group or groups of springs thus ensuring a damped transmission of shocks from the axle to the vehicle body.

Des exemples de bogies de véhicules ferroviaires sont présentés dans les documents US 1 962 893 A et CN 110 758 441 A . Dans le bogie selon US 1 962 893 A , la suspension primaire comporte un ressort primaire par roue, placé dans une cavité d'accueil au dessus de la boîte d'essieu. Dans le bogie selon CN 110 758 441 A , la suspension primaire comporte deux ressorts primaires par roue sans cavités d'accueil.Examples of railway vehicle bogies are presented in the documents US 1,962,893 A And CN 110 758 441 A . In the bogie according to US 1,962,893 A , the primary suspension comprises one primary spring per wheel, placed in a receiving cavity above the axle box. In the bogie according to CN 110 758 441 A , the primary suspension comprises two primary springs per wheel without receiving cavities.

Afin d'obtenir un amortissement élevé tout en limitant l'encombrement vertical, il est possible d'utiliser des ressorts de longueur élevée, s'étendant par exemple à l'avant ou à l'arrière de la boite d'essieu et étant en appui sur une partie inférieure de la boite d'essieu, disposée sous l'axe de rotation de l'essieu. Une telle solution n'est toutefois pas entièrement satisfaisante, puisqu'il est alors compliqué de monter ou d'enlever un essieu de la boite d'essieu, une grande partie du bogie, et notamment les groupements de ressorts devant alors être démontés.In order to obtain high damping while limiting the vertical bulk, it is possible to use springs of great length, extending for example at the front or at the rear of the axle box and being in bearing on a lower part of the axle box, arranged under the axis of rotation of the axle. Such a solution is however not entirely satisfactory, since it is then complicated to mount or remove an axle from the axle box, a large part of the bogie, and in particular the groups of springs then having to be dismantled.

Un but de l'invention est alors de proposer un bogie offrant un encombrement vertical restreint et des caractéristiques en termes d'amortissement élevées.An object of the invention is then to propose a bogie offering a restricted vertical bulk and high characteristics in terms of damping.

A cet effet, l'invention a pour objet un bogie de véhicule conforme à la revendication 1.To this end, the subject of the invention is a vehicle bogie according to claim 1.

Un bogie dans lequel le châssis comprend, pour chaque organe élastique une cavité d'accueil du ressort est particulièrement avantageux, puisqu'il permet l'installation de ressorts de grandes longueurs, dans une suspension ayant un encombrement vertical limité.A bogie in which the chassis comprises, for each elastic member, a cavity for receiving the spring is particularly advantageous, since it allows the installation of very long springs, in a suspension having a limited vertical space.

Selon des modes de réalisation particuliers de l'invention, le bogie de véhicule ferroviaire présente également l'une ou plusieurs des caractéristiques des revendications 2 à 8, prise(s) isolément ou suivant toute(s) combinaison(s) techniquement possible(s). L'invention concerne en outre un véhicule ferroviaire conforme à la revendication 9.According to particular embodiments of the invention, the railway vehicle bogie also has one or more of the characteristics of claims 2 to 8, taken separately or in any technically possible combination(s). ). The invention further relates to a railway vehicle according to claim 9.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant au dessin annexé, dans lequel la figure unique est une représentation schématique er coupe longitudinale d'un bogie selon l'invention et plus particulièrement de la suspension primaire s'étendant entre la boite d'essieu et le châssis de bogie.Other characteristics and advantages of the invention will become apparent on reading the following description, given solely by way of example and made with reference to the appended drawing, in which the single figure is a schematic representation and longitudinal section of a bogie according to the invention and more particularly the primary suspension extending between the axle box and the bogie frame.

Dans la suite de la description, les termes « haut » et « bas » ou « inférieur » et « supérieur » s'entendent en référence à la direction verticale du véhicule ferroviaire. Les termes « avant », « arrière » et « longitudinal » s'entendent en référence à la direction longitudinale du véhicule ferroviaire.In the rest of the description, the terms “top” and “bottom” or “lower” and “upper” are understood with reference to the vertical direction of the railway vehicle. The terms "front", "rear" and "longitudinal" refer to the longitudinal direction of the rail vehicle.

En référence à la figure, un véhicule ferroviaire 10 comprend un bogie 14. Le véhicule ferroviaire 10 comprend en outre un corps de véhicule monté sur le bogie 14 (non représenté).Referring to the figure, a railway vehicle 10 comprises a bogie 14. The railway vehicle 10 further comprises a vehicle body mounted on the bogie 14 (not shown).

Le véhicule ferroviaire 10 est par exemple une voiture destinée à circuler sur des rails. Le véhicule ferroviaire 10 est par exemple une locomotive ou une voiture d'un tramway, d'un métro ou d'une automotrice.The railway vehicle 10 is for example a car intended to travel on rails. The railway vehicle 10 is for example a locomotive or a car of a tram, a metro or a railcar.

Le bogie 14 comprend un châssis 22, au moins un essieu 12, au moins une boite d'essieu 24 recevant intérieurement l'au moins un essieu 12, et une suspension de la boîte d'essieu sur le châssis 22.The bogie 14 comprises a frame 22, at least one axle 12, at least one axle box 24 internally receiving the at least one axle 12, and a suspension of the axle box on the frame 22.

L'essieu 12 comprend un corps 15, et des roues (non représentées) montées sur le corps 15.Axle 12 includes body 15, and wheels (not shown) mounted on body 15.

Le corps 15 est typiquement rotatif autour d'un axe de rotation C-C' transversal.The body 15 is typically rotatable about a transverse axis of rotation C-C'.

Une partie 16 du corps d'essieu 15 est reçue dans la boîte d'essieu 24.A part 16 of the axle body 15 is received in the axle box 24.

La boîte d'essieu 24 comporte typiquement une liaison 20, tel qu'un roulement, qui guide le corps d'essieu 15 en rotation autour de l'axe de rotation C-C' par rapport au châssis 22.The axle box 24 typically includes a link 20, such as a bearing, which guides the axle body 15 in rotation around the axis of rotation CC' with respect to the frame 22.

La suspension comporte un bras 26, une articulation 28 connectant le bras 26 au châssis 22, et au moins un organe élastique 30. Le bogie 14 comprend en outre de préférence un amortisseur (non représenté).The suspension comprises an arm 26, an articulation 28 connecting the arm 26 to the frame 22, and at least one elastic member 30. The bogie 14 preferably further comprises a shock absorber (not shown).

Le châssis 22 comprend, pour le ou chaque organe élastique 30, une cavité 34 d'accueil dudit organe élastique 30. Dans l'exemple de la figure, le châssis 22 comprend une première cavité 35 et une deuxième cavité 36.The frame 22 comprises, for the or each elastic member 30, a cavity 34 for receiving said elastic member 30. In the example of the figure, the frame 22 comprises a first cavity 35 and a second cavity 36.

Chaque cavité 34 comprend une ouverture 37 et un fond 38.Each cavity 34 includes an opening 37 and a bottom 38.

Chaque fond 38 coopère avec un organe élastique 30. En particulier, une extrémité supérieure de l'organe élastique 30 est engagée dans la cavité 34 à travers l'ouverture 37 et est en appui sur le fond 38.L'ouverture 37 est décalée du fond 38. Le fond 38 est par exemple décalé verticalement vers le haut par rapport à l'ouverture 37.Each bottom 38 cooperates with an elastic member 30. In particular, an upper end of the elastic member 30 is engaged in the cavity 34 through the opening 37 and bears against the bottom 38. The opening 37 is offset from the bottom 38. The bottom 38 is for example offset vertically upwards relative to the opening 37.

L'ouverture 37 s'étend par exemple selon un plan parallèle à un plan dans lequel s'étend le fond 38. L'ouverture 37 est par exemple de forme circulaire.The opening 37 extends for example along a plane parallel to a plane in which the bottom 38 extends. The opening 37 is for example of circular shape.

Dans le mode de réalisation présenté sur la figure, le châssis 22 comprend un longeron creux 40.In the embodiment shown in the figure, the frame 22 comprises a hollow beam 40.

Le longeron creux 40 comprend, et est délimité par, une paroi inférieure 42 et une paroi supérieure 44. Le longeron creux 40 s'étend de préférence selon la direction longitudinale.The hollow spar 40 comprises, and is delimited by, a lower wall 42 and an upper wall 44. The hollow spar 40 preferably extends in the longitudinal direction.

Dans une variante particulière, le longeron creux 40 comprend au moins trois renforts 46.In a particular variant, the hollow spar 40 comprises at least three reinforcements 46.

La paroi inférieure 42 et la paroi supérieure 44 forment par exemple des plaques allongées selon la direction longitudinale et s'étendant sensiblement parallèlement entre elles.The lower wall 42 and the upper wall 44 form, for example, plates elongated in the longitudinal direction and extending substantially parallel to each other.

La paroi inférieure 42 est par exemple une tôle d'épaisseur comprise entre 12 mm et 20 mm.The bottom wall 42 is for example a sheet with a thickness of between 12 mm and 20 mm.

La paroi supérieure 44 s'étend par exemple sensiblement horizontalement. La paroi supérieure 44 est par exemple une tôle d'épaisseur comprise entre 10 mm et 18 mm.The upper wall 44 extends for example substantially horizontally. The upper wall 44 is for example a sheet with a thickness of between 10 mm and 18 mm.

La distance entre la paroi supérieure 44, et plus particulièrement le dessus de la paroi supérieure 44, par rapport à l'axe de rotation C-C' est par exemple compris entre 350mm et 410mm.The distance between the upper wall 44, and more particularly the top of the upper wall 44, relative to the axis of rotation C-C' is for example between 350mm and 410mm.

Chaque renfort 46 s'étend entre la paroi inférieure 42 et la paroi supérieure 44 et connecte la paroi inférieure 42 et la paroi supérieure 44. Chaque renfort 46 s'étend par exemple sensiblement verticalement. Chaque renfort 46 est par exemple une tôle d'épaisseur comprise entre 10 mm et 16 mm.Each reinforcement 46 extends between the lower wall 42 and the upper wall 44 and connects the lower wall 42 and the upper wall 44. Each reinforcement 46 extends for example substantially vertically. Each reinforcement 46 is for example a sheet with a thickness of between 10 mm and 16 mm.

Selon le mode de réalisation présenté sur la figure, l'ouverture 37 de la cavité 34 est ménagée dans la paroi inférieure 42 et le fond 38 de la cavité 34 est défini par la paroi supérieure 44.According to the embodiment shown in the figure, the opening 37 of the cavity 34 is formed in the lower wall 42 and the bottom 38 of the cavity 34 is defined by the upper wall 44.

Les renforts 46 définissent alors avantageusement un contour interne de la cavité 34 connectant l'ouverture 37 au fond 38 de la cavité 34.The reinforcements 46 then advantageously define an internal contour of the cavity 34 connecting the opening 37 to the bottom 38 of the cavity 34.

Selon un mode de réalisation particulier (non illustré), les parois 42, 44 et les renforts 46 définissant la cavité 34 sont réalisés par une même pièce, par exemple moulée. Dans l'exemple, avec deux cavités 35 et 36, les deux cavités peuvent avantageusement être réalisées en une ou deux pièces moulées (ou toute autre combinaison avantageuse de pièces moulées, forgées ou de produits plats).According to a particular embodiment (not shown), the walls 42, 44 and the reinforcements 46 defining the cavity 34 are made from a single part, for example molded. In the example, with two cavities 35 and 36, the two cavities can advantageously be made in one or two castings (or any other advantageous combination of castings, forgings or flat products).

Dans une variante particulière, le châssis 22 comprend une première région de butée 49, adaptée pour venir en contact avec le bras 26 et pour limiter le déplacement du bras 26 par rapport au châssis 22.In a particular variant, the frame 22 comprises a first abutment region 49, adapted to come into contact with the arm 26 and to limit the movement of the arm 26 relative to the frame 22.

L'articulation 28 connecte le bras 26 au châssis 22. L'articulation 28 est en particulier adaptée pour autoriser la rotation du bras 26 par rapport au châssis 22, de préférence sur une plage de rotation inférieure à ± 6°.Articulation 28 connects arm 26 to frame 22. Articulation 28 is in particular adapted to allow rotation of arm 26 relative to frame 22, preferably over a range of rotation less than ±6°.

Le bras 26 comprend une face supérieure 51 disposée en regard du châssis 22, et une face inférieure 50 disposée à l'opposé de la face supérieure 51.The arm 26 comprises an upper face 51 arranged facing the frame 22, and a lower face 50 arranged opposite the upper face 51.

Le bras 26 comprend une extrémité libre 52 opposée à une extrémité de raccord 54, extrémité de raccord 54 en laquelle il est connecté au châssis 22 par l'articulation 28. Le bras 26 s'étend entre l'extrémité libre 52 et l'extrémité de raccord 54. Le bras 26 est de préférence allongé entre l'extrémité libre 52 et l'extrémité de raccord 54, c'est-à-dire que la grande dimension du bras 26 s'étend sensiblement selon la direction formée entre l'extrémité libre 52 et l'extrémité de raccord 54.The arm 26 includes a free end 52 opposite a connector end 54, connector end 54 in which it is connected to the frame 22 by the joint 28. The arm 26 extends between the free end 52 and the end connector 54. The arm 26 is preferably elongated between the free end 52 and the connector end 54, that is to say that the large dimension of the arm 26 extends substantially along the direction formed between the free end 52 and the connecting end 54.

Le bras 26 comprend au moins une région d'appui 58.The arm 26 includes at least one bearing region 58.

La ou chaque région d'appui 58 est de préférence formée sur la face supérieure 51 du bras 26. La ou chaque région d'appui 58 est en particulier formée en regard d'une ouverture 37 d'une cavité 34.The or each support region 58 is preferably formed on the upper face 51 of the arm 26. The or each support region 58 is in particular formed facing an opening 37 of a cavity 34.

La ou chaque région d'appui 58 est décalée longitudinalement vers l'avant ou vers l'arrière par rapport à la boite d'essieu 24.The or each support region 58 is offset longitudinally forwards or backwards with respect to the axle box 24.

Dans la variante présentée sur la figure, le bras 26 comprend une région d'appui décalée vers l'avant 62 et une région d'appui décalée vers l'arrière 60 par rapport à la boite d'essieu 24. Dans cette variante, la région d'appui arrière 60 est décalée vers l'extrémité de raccord 54 ; et la région d'appui avant 62 est décalée vers l'extrémité libre 52.In the variant shown in the figure, the arm 26 comprises a support region offset forwards 62 and a support region offset rearwards 60 with respect to the axle box 24. In this variant, the rear support region 60 is offset towards the connection end 54; and front bearing region 62 is offset toward free end 52.

Chaque région d'appui 58 coopère avec un organe élastique 30. En particulier, l'organe élastique 30 a une extrémité inférieure en appui sur l'une des ou la région d'appui 58.Each support region 58 cooperates with an elastic member 30. In particular, the elastic member 30 has a lower end resting on one of or the support region 58.

Chaque région d'appui 58 s'étend par exemple sensiblement selon un plan horizontal. Chaque région d'appui 58 s'étend de préférence verticalement au niveau ou légèrement au-dessus de l'axe de rotation C-C' de l'essieu 12 par rapport au bogie 14. Chaque région d'appui 58 s'étend en particulier entre l'axe central C-C' et un sommet 63 de la boite d'essieu. Par sommet 63 de la boite d'essieu 24 on entend ici la région la plus haute de la boite d'essieu 24.Each bearing region 58 extends for example substantially along a horizontal plane. Each bearing region 58 preferably extends vertically at or slightly above the axis of rotation C-C' of the axle 12 with respect to the bogie 14. Each bearing region 58 extends in particular between the central axis C-C' and a vertex 63 of the axle box. By top 63 of the axle box 24 is meant here the highest region of the axle box 24.

Le bras 26 comprend par exemple une deuxième région de butée 65, disposée en regard de la première région de butée 49 et adaptée pour venir en contact avec la deuxième région de butée 49, en particulier pour limiter le déplacement du bras 26 vers le châssis 22. La deuxième région de butée s'étend par exemple longitudinalement entre la région d'appui décalée vers l'arrière 60 et la région d'appui décalée vers l'avant 62.The arm 26 comprises for example a second abutment region 65, arranged facing the first abutment region 49 and adapted to come into contact with the second abutment region 49, in particular to limit the movement of the arm 26 towards the frame 22 The second abutment region extends, for example, longitudinally between the support region shifted towards the rear 60 and the support region shifted forwards 62.

La bras 26 porte la boite d'essieu 24 et, dans une variante particulière, forme une portion de la boite d'essieu 24.The arm 26 carries the axle box 24 and, in a particular variant, forms a portion of the axle box 24.

La boite d'essieu 24 comprend de préférence un corps supérieur 66 et un corps inférieur 68. La boite d'essieu 24 comprend de préférence des moyens de fixation 70 du corps inférieur 68 sur le corps supérieur 66.The axle box 24 preferably comprises an upper body 66 and a lower body 68. The axle box 24 preferably comprises means 70 for fixing the lower body 68 to the upper body 66.

Le corps inférieur 68 est lié au corps supérieur 66. En particulier, le corps inférieur 68 est fixé au corps supérieur 66 par les moyens de fixation 70 démontables, les moyens de fixation 70 étant par exemple des vis. Lorsque les moyens de fixation 70 sont démontés, le corps inférieur 68 est par exemple amovible.The lower body 68 is connected to the upper body 66. In particular, the lower body 68 is fixed to the upper body 66 by removable fixing means 70, the fixing means 70 being for example screws. When the fixing means 70 are removed, the lower body 68 is for example removable.

Le corps supérieur 66 s'étend au-dessus de la liaison 20. Le corps supérieur 66 est adapté pour supporter l'effort appliqué par le véhicule ferroviaire 10 sur l'essieu 12.The upper body 66 extends above the link 20. The upper body 66 is adapted to support the force applied by the railway vehicle 10 on the axle 12.

Le corps supérieur 66 comprend par exemple une face intérieure 72 destinée à coopérer avec la liaison 20. La face intérieure 72 est par exemple en forme de portion de cylindre, et plus particulièrement en forme de demi cylindre.The upper body 66 comprises for example an inner face 72 intended to cooperate with the connection 20. The inner face 72 is for example in the shape of a portion of a cylinder, and more particularly in the shape of a half cylinder.

Le corps supérieur 66 est de préférence défini par la face inférieure 50du bras, une portion de la face inférieure 50 du bras formant alors la face intérieure 72 du corps supérieur 66.The upper body 66 is preferably defined by the lower face 50 of the arm, a portion of the lower face 50 of the arm then forming the inner face 72 of the upper body 66.

Le corps inférieur 68 est par exemple formé par une pièce concave et comprend une face intérieure 74 destinée à coopérer avec la liaison 20. La face intérieure 74 est par exemple en forme de portion de cylindre, et plus particulièrement en forme de demi cylindre.The lower body 68 is for example formed by a concave part and comprises an inner face 74 intended to cooperate with the connection 20. The inner face 74 is for example in the shape of a portion of a cylinder, and more particularly in the shape of a half-cylinder.

L'au moins un organe élastique 30 comprend au moins un ressort 76.The at least one elastic member 30 comprises at least one spring 76.

Dans la variante représentée sur la figure, le bogie comprend deux organes élastiques 30, un premier organe élastique 78 comprenant deux ressorts concentriques 76 et un deuxième organe élastique 80 comprenant seulement un ressort 76.In the variant shown in the figure, the bogie comprises two elastic members 30, a first elastic member 78 comprising two concentric springs 76 and a second elastic member 80 comprising only one spring 76.

Chaque ressort 76 comprend une extrémité inférieure 82 et une extrémité supérieure 84. Dans la variante représentée, chaque organe élastique 30 comprends une sellette supérieure 48 et une sellette inférieure 64. Les sellettes supérieure 48 et inférieure 64 comportent au moins un anneau sur lequel est appuyé l'extrémité respectivement supérieure 84 et inférieure 82 du ressort 76 et un pion faisant saillie au centre de l'anneau et étant engagé dans le ressort 76. Les sellettes supérieures 48 sont fixées au niveau des fonds 38 et les sellettes inférieures 64 sont fixées au niveau des régions d'appui 58.Each spring 76 comprises a lower end 82 and an upper end 84. In the variant shown, each elastic member 30 comprises an upper saddle 48 and a lower saddle 64. The upper 48 and lower saddles 64 comprise at least one ring on which is pressed the respectively upper 84 and lower 82 end of the spring 76 and a pin protruding from the center of the ring and being engaged in the spring 76. The upper saddles 48 are fixed at the level of the bottoms 38 and the lower saddles 64 are fixed at the level of support regions 58.

En référence à la figure, le premier organe élastique 78 est en appui sur la région d'appui décalée longitudinalement vers l'avant 62 par rapport à la boite d'essieu 24 d'une part et sur le fond 38 de la première cavité 35 d'autre part. Le deuxième organe élastique 80 est en appui sur la région d'appui décalée longitudinalement vers l'arrière 60 par rapport à la boite d'essieu 24 d'une part et sur le fond 38 de la deuxième cavité 36 d'autre part. La boite d'essieu 24 est ainsi disposée longitudinalement entre le premier organe élastique 78 et le deuxième organe élastique 80.With reference to the figure, the first elastic member 78 bears against the support region offset longitudinally forwards 62 relative to the axle box 24 on the one hand and against the bottom 38 of the first cavity 35 on the other hand. The second elastic member 80 bears against the support region offset longitudinally rearwardly 60 with respect to the axle box 24 on the one hand and against the bottom 38 of the second cavity 36 on the other hand. The axle box 24 is thus arranged longitudinally between the first elastic member 78 and the second elastic member 80.

Typiquement, les ressorts 76 sont des ressorts hélicoïdaux.Typically the springs 76 are coil springs.

Chaque ressort 76 comporte de préférence entre 3 et 8 spires actives et de préférence entre 3 et 6 spires actives.Each spring 76 preferably comprises between 3 and 8 active turns and preferably between 3 and 6 active turns.

La raideur de chaque ressort 76 est de préférence comprise entre 200 N/mm et 500 N/mm pour le premier organe élastique 78 et entre 900 N/mm et 1200 N/mm pour le deuxième organe élastique 80.The stiffness of each spring 76 is preferably between 200 N/mm and 500 N/mm for the first elastic member 78 and between 900 N/mm and 1200 N/mm for the second elastic member 80.

La longueur de chaque ressort 76 n'est généralement pas la même pour des ressorts du premier organe élastique 78 que pour ceux du deuxième organe élastique 80.The length of each spring 76 is generally not the same for the springs of the first elastic member 78 as for those of the second elastic member 80.

La longueur de chaque ressort 76 est toujours supérieure à 220mm lorsque les ressorts 76 sont installés dans le bogie 14. La longueur de chaque ressort 76 est en particulier comprise entre 220 mm et 360mm lorsque les ressorts sont installés dans le bogie 14. La longueur à vide de chaque ressort est par exemple de 425mm.The length of each spring 76 is always greater than 220 mm when the springs 76 are installed in the bogie 14. The length of each spring 76 is in particular between 220 mm and 360 mm when the springs are installed in the bogie 14. vacuum of each spring is for example 425mm.

La longueur de chaque ressort 76 du premier organe élastique 78, lorsque le ressort 76 est installé dans le bogie 14, est par exemple comprise entre 300mm et 360mm et la longueur de chaque ressort 76 du deuxième organe élastique 80, lorsque le ressort 76 est installé dans le bogie 14, est par exemple comprise entre 220mm et 300mm.The length of each spring 76 of the first elastic member 78, when the spring 76 is installed in the bogie 14, is for example between 300mm and 360mm and the length of each spring 76 of the second elastic member 80, when the spring 76 is installed in the bogie 14, is for example between 220mm and 300mm.

Dans la variante selon laquelle le châssis 22 comprend une première région de butée 49 et le bras 26 comprend une deuxième région de butée 65, la longueur de chaque ressort 76 est minimale lorsque la première région de butée 49 est au contact de la deuxième région de butée 65.In the variant in which the frame 22 includes a first abutment region 49 and the arm 26 includes a second abutment region 65, the length of each spring 76 is minimal when first abutment region 49 is in contact with second abutment region 65.

L'amortisseur (non représenté) est par exemple connecté d'une part au châssis 22 et d'autre part au bras 26. L'amortisseur est en particulier adapté pour amortir les déplacements du bras 26 par rapport au châssis 22. L'amortisseur est par exemple disposé longitudinalement entre le premier organe élastique 78 et le deuxième organe élastique 80.The damper (not shown) is for example connected on the one hand to the frame 22 and on the other hand to the arm 26. The damper is in particular suitable for damping the movements of the arm 26 with respect to the frame 22. The damper is for example arranged longitudinally between the first elastic member 78 and the second elastic member 80.

Un procédé d'installation d'un essieu 12 dans un bogie 14 de véhicule ferroviaire tel que précédemment présenté va maintenant être décrit.A method of installing an axle 12 in a railway vehicle bogie 14 as previously presented will now be described.

Lors d'une étape de fourniture, un bogie 14 tel que précédemment décrit est fourni.During a supply step, a bogie 14 as previously described is supplied.

Lors d'une étape d'installation suivant l'étape de fourniture, l'essieu 12 est installée dans la boite d'essieu 24. Le corps inférieur 68 est en particulier détaché du corps supérieur 66 et l'essieu 12 est mis en place par rapport au bogie 14. La liaison 20 est par exemple installée autour de l'essieu 12, et l'essieu muni de la liaison 20 est installé dans le corps supérieur 66, par exemple au contact de la face intérieur 72 du corps supérieur 66. Le corps inférieur 68 est ensuite amené autour de l'essieu 12, et plus particulièrement autour de la liaison 20, le corps inférieur 68 et le corps supérieur 66 enserrant ainsi l'essieu 12 et la liaison 20.During an installation step following the supply step, the axle 12 is installed in the axle box 24. The lower body 68 is in particular detached from the upper body 66 and the axle 12 is put in place. relative to the bogie 14. The link 20 is for example installed around the axle 12, and the axle provided with the link 20 is installed in the upper body 66, for example in contact with the inner face 72 of the upper body 66 The lower body 68 is then brought around the axle 12, and more particularly around the link 20, the lower body 68 and the upper body 66 thus enclosing the axle 12 and the link 20.

Lors d'une étape de fixation suivant l'étape de liaison, le corps inférieur 68 est fixé sur le corps supérieur 66 pour former la boiter d'essieu 24 autour de l'essieu 12 installée dans le corps supérieur 66. Le corps inférieur 68 est par exemple fixé au corps supérieur 66 par l'intermédiaire des moyens de fixation 70. Les moyens de fixation 70 sont par exemple détachables, le corps inférieur 68 étant ainsi amovible par rapport au corps supérieur 66, notamment pour permettre un remplacement de l'essieu 12 ou d'une partie de l'essieu 12.During a fixing step following the connecting step, the lower body 68 is fixed to the upper body 66 to form the axle housing 24 around the axle 12 installed in the upper body 66. The lower body 68 is for example fixed to the upper body 66 by means of the fixing means 70. The fixing means 70 are for example detachable, the lower body 68 thus being removable with respect to the upper body 66, in particular to allow replacement of the axle 12 or part of axle 12.

Un châssis 22 comprenant, pour le ou chaque organe élastique 30, une cavité 34 d'accueil dudit organe élastique 30 permet l'utilisation de ressorts 76 de grande longueur sans compliquer l'installation d'essieux 12 sur le bogie 14, tout en limitant l'encombrement vertical du bogie 14.A chassis 22 comprising, for the or each elastic member 30, a cavity 34 for receiving said elastic member 30 allows the use of very long springs 76 without complicating the installation of axles 12 on the bogie 14, while limiting the vertical dimensions of the bogie 14.

L'utilisation d'un bras 26 définissant le corps supérieur 66 de boite d'essieu 24 et d'un corps inférieur 68 lié au corps supérieur 66 est particulièrement avantageux pour faciliter l'installation d'un essieu 12 dans le bogie 14, l'essieu 12 pouvant alors être installé et/ou désinstallé par simple montage/démontage du corps inférieur 68 autour de la portion de liaison 20.The use of an arm 26 defining the upper body 66 of the axle box 24 and of a lower body 68 connected to the upper body 66 is particularly advantageous for facilitating the installation of an axle 12 in the bogie 14, the axle 12 can then be installed and / or uninstalled by simple assembly / disassembly of the lower body 68 around the connecting portion 20.

Un châssis 22 comprenant un longeron creux 40 définissant la cavité 34 est particulièrement avantageux puisqu'il permet de loger une partie significative de la longueur des organes élastique 30 (par exemple entre 30% et 50%).A frame 22 comprising a hollow beam 40 defining the cavity 34 is particularly advantageous since it makes it possible to accommodate a significant part of the length of the elastic members 30 (for example between 30% and 50%).

La position de la région d'appui 58 est particulièrement avantageuse pour obtenir une grande longueur de ressort 76 tout en permettant l'utilisation d'un corps inférieur 68 qui puisse être facilement amovible pour faciliter l'installation de l'essieu sur le bogie 14 ou la dépose de l'essieu 12 par rapport au bogie 14.The position of the support region 58 is particularly advantageous for obtaining a great length of spring 76 while allowing the use of a lower body 68 which can be easily removed to facilitate the installation of the axle on the bogie 14 or removal of axle 12 from bogie 14.

L'utilisation de deux groupements de ressorts 30 est particulièrement avantageuse puisqu'elle permet l'utilisation de ressorts 76 peu encombrants et limite l'effort appliqué sur l'articulation 28.The use of two groups of springs 30 is particularly advantageous since it allows the use of space-saving springs 76 and limits the force applied to the joint 28.

Claims (9)

  1. A bogie (14) for a railway vehicle (10), comprising:
    - a frame (22);
    - at least one axle (12);
    - at least one axle box (24), internally receiving the at least one axle (12);
    - a suspension of the or each axlebox (24) on the frame (22);
    the suspension comprising:
    - an arm (26) supporting the axle box (24); and
    - at least one elastic member (30) interposed between the arm (26) and the frame (22);
    the frame (22) comprising, for the or each elastic member (30), a cavity (34) for receiving said elastic member (30), the cavity (34) comprising an opening (37) and a bottom (38), an upper end of the elastic member (30) being engaged in the cavity (34) through the opening (37) and bearing on the bottom (38), characterized in that
    the bogie (14) comprises two elastic members (30), a first elastic member (78) bearing on a bearing region offset longitudinally forwards (62) with respect to the axle (24), and a second elastic member (80) bearing on a bearing region offset rearwards (60) with respect to the axle (24).
  2. A bogie (14) for a railway vehicle (10) according to claim 1, wherein the arm (26) comprises at least one bearing region (58) offset longitudinally forwards or rearwards relative to the axle (24), the at least one elastic member (30) having a lower end bearing on the at least one bearing region (58).
  3. A bogie (14) for a railway vehicle (10) according to claim 2, wherein the bearing region (58) extends vertically between a central axis (C-C') of the axle and a vertex (63) of the axle box (24).
  4. A bogie (14) for a railway vehicle (10) according to any one of the preceding claims, wherein the bogie comprises a joint (28) connecting the arm (26) to the frame (22), the arm (26) preferably being rotatable relative to the frame (22) about the joint (28).
  5. A bogie (14) for a railway vehicle (10) according to any of the preceding claims, wherein the axle box (24) comprises an upper body (66) and a lower body (68) removably connected to the upper body (66).
  6. A bogie (14) for a railway vehicle (10) according to claim 5, wherein the arm defines the upper body (66).
  7. A bogie (14) for a railway vehicle (10) according to any one of the preceding claims, wherein the frame (22) comprises a hollow spar (40) bounded by a lower wall (42) and an upper wall (44), the opening (37) being formed in the lower wall (42) and the cavity (34) extending into the hollow spar (40).
  8. A bogie (14) for a railway vehicle (10) according to claim 7, wherein the bottom (38) is vertically upwardly offset from the opening (37), the bottom (38) being defined by the upper wall (44).
  9. A railway vehicle (10) comprising at least one bogie (14) according to any of claims 1 to 8.
EP21198573.4A 2020-09-23 2021-09-23 Railway vehicle bogie and associated vehicle Active EP3974283B1 (en)

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FR2009647A FR3114292A1 (en) 2020-09-23 2020-09-23 Railway vehicle bogie, vehicle and axle installation method thereof

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CA (1) CA3131568A1 (en)
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CN111267893B (en) * 2020-03-13 2021-10-26 中车株洲电力机车有限公司 Rail vehicle framework

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FR3114292A1 (en) 2022-03-25
CA3131568A1 (en) 2022-03-23
US20220089200A1 (en) 2022-03-24
EP3974283A1 (en) 2022-03-30

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