EP4071026B1 - Primary suspension device for a railway vehicle bogie - Google Patents

Primary suspension device for a railway vehicle bogie Download PDF

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Publication number
EP4071026B1
EP4071026B1 EP22166629.0A EP22166629A EP4071026B1 EP 4071026 B1 EP4071026 B1 EP 4071026B1 EP 22166629 A EP22166629 A EP 22166629A EP 4071026 B1 EP4071026 B1 EP 4071026B1
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EP
European Patent Office
Prior art keywords
hook
suspension device
primary suspension
bogie
hooks
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EP22166629.0A
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German (de)
French (fr)
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EP4071026A1 (en
Inventor
Alain Rodet
Ludovic FAURE
Louis-Manuel ANTUNES
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Alstom Holdings SA
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Alstom Holdings SA
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Publication of EP4071026A1 publication Critical patent/EP4071026A1/en
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    • 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

  • the present invention relates to a primary suspension device for a railway vehicle bogie.
  • the present invention mainly relates to a tramway type railway vehicle, preferably with a low floor.
  • a primary suspension device for a railway vehicle bogie comprising a first part intended to be secured to a chassis of the bogie, a second part intended to be secured to an axle structure of the bogie, and elastic suspension means connecting the first part to the second part, the primary suspension device comprising means for limiting the movements of the first and second parts relative to each other, the limitation means comprising a high end-of-travel stop and a low end-of-travel stop.
  • the end stops are arranged at a distance from each other, and at a distance from the rubber block.
  • the document CN 110733524 A also describes an example of movement limitation means similar to those in the preamble of claim 1.
  • the document KR 2012 011 9377 A describes another example of movement limitation, in which two hooks form a high end stop.
  • the invention aims in particular to reduce the bulk of the movement limitation means.
  • the invention relates in particular to a suspension device according to claim 1.
  • the movement limitation means according to the invention being formed by hooks engaged one into the other with play, the upper and lower limit stops are both carried by these hooks.
  • the bulk of the limitation means is therefore particularly reduced, in particular compared to conventional limitation means where the end stops are formed by distinct, separate and independent elements.
  • the invention also relates to a railway vehicle bogie, comprising a chassis and at least one axle structure, characterized in that it comprises at least one primary suspension device as defined above, the first part being carried by the chassis and the second part carried by the axle structure.
  • the invention also relates to a railway vehicle, characterized in that it comprises at least one bogie as defined above.
  • a bogie 8 of a railway vehicle comprising at least one primary suspension device 10 according to an example embodiment of the invention.
  • the bogie 8 is for example intended to equip a tramway, preferably with a low floor.
  • the bogie 8 comprises a chassis 12, intended to carry a railway vehicle body via a secondary suspension device 13 of conventional type.
  • the bogie 8 conventionally comprises two pairs of wheels 14, arranged respectively at the front and at the rear of the bogie 8.
  • the wheels 14 of each pair are connected to each other by an axle structure 16.
  • Each axle structure 16 shown in more detail on the figure 2 , comprises two axle boxes 18, namely one for each wheel 14, as well as an axle crossmember 20 extending transversely between the two axle boxes 18 and secured to these axle boxes 18.
  • axle structures 16 are carried by the chassis 12 via primary suspension means 10.
  • the chassis 12 preferably comprises two side rails 22, extending in a longitudinal direction axle 20. Only one of the side members is visible on the figure 1 .
  • each crosspiece 24 is integral with a respective side beam 22.
  • each side rail 22 is connected to an axle box 18 via these primary suspension means 10.
  • the primary suspension means 10 comprise, for each axle box 18, an arm 26 extending substantially longitudinally between a first end secured to the corresponding axle box 18, and a second free end.
  • Each arm 26 is articulated around a pivot connection 28 with the chassis 12, in particular with one of the side rails 22.
  • the pivot connection 28 is for example formed by an elastic articulation.
  • the primary suspension means 10 comprise a first part 10A, intended to be secured to the chassis 12 of the bogie, a second part 10B intended to be secured to the axle structure 16 of the bogie, and elastic suspension means 29 connecting the first part 10A to the second part 10B.
  • the first part 10A is for example formed by an element attached to the chassis 12, in particular to one of the longitudinal members 22. Alternatively, this element is made integral with the corresponding longitudinal member 22.
  • the second part 10B is for example formed at the free end of the arm 26. In the example described, the second part 10B comes integrally with the arm 26.
  • the elastic suspension means 29 comprise, for each arm 26, an elastic block 30 extending between a first seat provided on the first part 10A, and a second seat provided on the second part 10B.
  • the elastic block 30 has substantially a parallelepiped shape, for example a cube shape.
  • the elastic block 30 is for example made at least partly of rubber.
  • the first and second seats are preferably inclined relative to the longitudinal direction X, at an angle preferably between 20° and 40°.
  • each arm 26 extends substantially longitudinally, so that each elastic block 30 is offset substantially at the height of the axle structures 16.
  • the vertical bulk of the primary suspension means 10 is therefore reduced, in particular compared to suspensions conventional bogie primaries generally arranged above the axle structures.
  • the elastic block 30 makes it possible to cushion the relative movements of the axle structure 16 relative to the chassis 12 around the pivot connection 28.
  • the elastic block 30 advantageously comprises first 32 and second 34 end plates, each intended to cooperate with the first or second corresponding seat.
  • the end plates 32, 34 are for example made of metallic material, and secured to the rubber in any conceivable manner.
  • At least one of the first 32 and second 34 plates is secured to the first or second corresponding seat.
  • This connection is preferably removable, that is to say that the elastic block 30 can be mounted or disassembled without destruction of elements of the suspension device 10. This removable connection will be described in more detail later.
  • the suspension device 10 comprises means 36 for limiting these movements.
  • the limiting means 36 include a high end-of-travel stop and a low end-of-travel stop.
  • the upper end-of-travel stop is that limiting a movement moving the first 10A and second 10B parts away from each other, and the lower end-of-travel stop is that limiting a movement bringing the first 10A and second 10B parts closer together. 'one from the other.
  • the upper and lower end stops are formed by at least one first hook 38 carried by the first part 10A and at least one second hook 40 carried by the second part 10B.
  • the first 38 and second 40 hooks are engaged one into the other with play, so as to form the upper and lower end stops.
  • the first hook 38 comprises a first hook body 38A comprising a first abutment surface 39A, and a first hook head 38B curved so as to have a first exterior surface 39B and a first interior surface 39C.
  • the first interior surface 39C faces the first abutment surface 39A, and the first exterior surface 39B faces opposite the first interior surface 39C.
  • the second hook 40 comprises a second hook body 40A comprising a second abutment surface 41A, and a second hook head 40B comprising a second outer surface 41B and a second inner surface 41C.
  • the second inner surface 41C faces the second abutment surface 41A, and the second outer surface 41B faces opposite the second inner surface 41C.
  • the second exterior surface 41B of the second hook 40 has an angle whose apex 42 is closer to the first abutment surface 39A than the distance between the first exterior surface 39B and the second abutment surface 41A.
  • the second exterior surface 41B comes into contact with the first abutment surface 39A while a clearance remains between the first exterior surface 39B and the second abutment surface 41A.
  • the lower end of travel stop is therefore formed by the second exterior surface 41B of the second hook 40 and the first stop surface 39A of the first hook 38.
  • the first exterior surface 39B does not normally come into contact with the second abutment surface 41A, except for example in the event of breakage of the second hook 40.
  • the hooks 38, 40 can be dimensioned so that the exterior surfaces 39B , 41B simultaneously abut against the corresponding abutment surfaces 41a, 39A.
  • the upper end stop is formed by the first 39C and second 41C interior surfaces coming into contact with each other when the first 10A and second 10B parts move away from each other.
  • first 38 and second 40 hooks are removably fixed on the first 10A or second 10B corresponding part, for example by screwing.
  • Fixing means are considered to be removable when they allow assembly and reassembly without destruction of these fixing means.
  • the elastic block 30 is housed in a housing space partly delimited by the first 38 and second 40 hooks.
  • the elastic block 30 is thus arranged in the immediate vicinity of the hooks 38, 40, and held in the accommodation space by them.
  • the compactness of the suspension device 10 is therefore optimal.
  • said housing space is delimited longitudinally by edges 44 and 46 carried by the first part 10A.
  • the second part 10B could alternatively, or in a complementary manner, also include edges delimiting the accommodation space.
  • the accommodation space is delimited laterally, on the one hand by a side wall 48, or any other element, such as a stud, secured to the first part 10A, for example provided on the chassis 12, and on the other hand by hooks 38, 40.
  • the hooks 38, 40 being removable, access to the accommodation space, in particular for the replacement of the elastic block 30, is made laterally when the hooks 38, 40 are removed.
  • one of the first 32 or second 34 end plates of the elastic block 30 is secured to the first 38 or second 40 corresponding hook.
  • the second end plate 34 is secured to the body 40A of the second hook 40.
  • the second end plate 34 comprises at least one tongue 50 extending transversely, preferably two tongues 50, and the body 40A of the second hook 40 comprises, for each tongue 50, a complementary notch 52.
  • the replacement of the elastic block 30 is particularly easy, and can be carried out under the railway vehicle, without removing the bogie.
  • the first hook 38 is unscrewed and removed.
  • first 10A and second 10B parts are spaced apart from each other, by unloading the axle, for example by lifting the bogie frame 12 using jacks.
  • the elastic block 30 remains attached to the second part 10B, by the second hook 40.
  • the second hook 40 is unscrewed and removed, thus releasing the elastic block 30.
  • the elastic block 30 can then be removed and replaced, during a fourth step.
  • the second hook 40 is put back in place and screwed back in during a fifth step, to hold the new elastic block 30 against the second seat of the second part 10B.
  • the cylinders are released, and the first 10A and second 10B parts return to their initial position.
  • the first hook 38 is put back in place and screwed back.
  • the invention could be applied in the same way to a carrier bogie or to a motor bogie.
  • chassis 12 of the bogie could have a structure other than that which was previously described.
  • the bogie according to the invention could equip any railway vehicle other than a tramway, for example a metro or a mainline train.
  • the invention makes it possible to produce a very compact suspension device 10, the suspension and movement limitation functions being located around the elastic block 30, and requiring few parts since these functions are carried out by this elastic block 30 and the hooks 38, 40, these hooks 38, 40 also ensuring the maintenance of the elastic block 30.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)

Description

La présente invention concerne un dispositif de suspension primaire pour un bogie de véhicule ferroviaire.The present invention relates to a primary suspension device for a railway vehicle bogie.

Plus particulièrement, la présente invention concerne principalement un véhicule ferroviaire de type tramway, de préférence à plancher bas.More particularly, the present invention mainly relates to a tramway type railway vehicle, preferably with a low floor.

On connait déjà, dans l'état de la technique, un dispositif de suspension primaire pour bogie de véhicule ferroviaire, comprenant une première partie destinée à être solidarisée à un châssis du bogie, une seconde partie destinée à être solidarisée à une structure d'essieu du bogie, et des moyens de suspension élastiques reliant la première partie à la seconde partie, le dispositif de suspension primaire comprenant des moyens de limitation des déplacements des première et seconde parties l'une par rapport à l'autre, les moyens de limitation comprenant une butée de fin de course haute et une butée de fin de course basse.We already know, in the state of the art, a primary suspension device for a railway vehicle bogie, comprising a first part intended to be secured to a chassis of the bogie, a second part intended to be secured to an axle structure of the bogie, and elastic suspension means connecting the first part to the second part, the primary suspension device comprising means for limiting the movements of the first and second parts relative to each other, the limitation means comprising a high end-of-travel stop and a low end-of-travel stop.

Habituellement, et principalement dans le cadre de moyens de suspension comprenant au moins un bloc en caoutchouc, les butées de fin de course sont agencées à distance l'une de l'autre, et à distance du bloc en caoutchouc.Usually, and mainly in the context of suspension means comprising at least one rubber block, the end stops are arranged at a distance from each other, and at a distance from the rubber block.

Le document CN 110733524 A décrit également un exemple de moyens de limitation de déplacement similaires à ceux du préambule de la revendication 1. Le document KR 2012 011 9377 A décrit une autre exemple de limitation de déplacement, dans lequel deux crochets forment une butée de fin de course haute.The document CN 110733524 A also describes an example of movement limitation means similar to those in the preamble of claim 1. The document KR 2012 011 9377 A describes another example of movement limitation, in which two hooks form a high end stop.

L'invention a notamment pour but de réduire l'encombrement des moyens de limitation de déplacement.The invention aims in particular to reduce the bulk of the movement limitation means.

A cet effet, l'invention a notamment pour objet un dispositif de suspension selon la revendication 1.For this purpose, the invention relates in particular to a suspension device according to claim 1.

Les moyens de limitation de déplacement selon l'invention étant formés par des crochets engagés l'un dans l'autre avec jeu, les butées de fin de course haute et basse sont toutes deux portées par ces crochets. L'encombrement des moyens de limitation est donc particulièrement réduit, notamment par rapport à des moyens de limitation classiques où les butées de fin de course sont formées par des éléments distincts, séparés et indépendants.The movement limitation means according to the invention being formed by hooks engaged one into the other with play, the upper and lower limit stops are both carried by these hooks. The bulk of the limitation means is therefore particularly reduced, in particular compared to conventional limitation means where the end stops are formed by distinct, separate and independent elements.

Le dispositif de suspension selon l'invention présente d'autres avantages liés à d'autres caractéristiques optionnelles définies ci-dessous, qui peuvent être prises seules ou selon toutes combinaisons techniquement envisageables.

  • Le premier crochet comporte un premier corps de crochet comprenant une première surface de butée, et une première tête de crochet comprenant une première surface extérieure et une première surface intérieure ; le second crochet comporte un second corps de crochet comprenant une seconde surface de butée, et une seconde tête de crochet comprenant une seconde surface extérieure et une seconde surface intérieure ; les premier et second crochets étant engagés l'un dans l'autre de sorte que la seconde surface extérieure du second crochet est agencée en regard de la première surface de butée du premier crochet, et la première surface extérieure du premier crochet est agencée en regard de la seconde surface de butée du second crochet, et la première surface intérieure du premier crochet est agencée en regard de la seconde surface intérieure du second crochet.
  • La seconde surface extérieure du second crochet comporte un angle formant un sommet plus proche de la première surface de butée que la distance entre la première surface extérieure et la seconde surface de butée.
  • Les moyens de suspension comportent au moins un bloc élastique, agencé entre la première et la seconde partie.
  • Le bloc élastique est logé dans un espace de logement en partie délimité par les premier et second crochets.
  • Le bloc élastique s'étend entre des première et seconde platines, au moins l'une des première et seconde platines étant destinée à être fixée à la première ou seconde partie correspondante.
  • L'une des première ou seconde platines comporte au moins une languette destinée à coopérer avec une encoche complémentaire ménagée dans le premier ou second crochet correspondant.
  • Au moins l'un des premier ou second crochets est monté de manière amovible sur la première ou seconde partie correspondante.
The suspension device according to the invention has other advantages linked to other optional characteristics defined below, which can be taken alone or in any technically conceivable combination.
  • The first hook has a first hook body including a first abutment surface, and a first hook head including a first outer surface and a first inner surface; the second hook has a second hook body including a second abutment surface, and a second hook head including a second outer surface and a second inner surface; the first and second hooks being engaged with each other so that the second outer surface of the second hook is arranged facing the first abutment surface of the first hook, and the first outer surface of the first hook is arranged facing of the second abutment surface of the second hook, and the first interior surface of the first hook is arranged opposite the second interior surface of the second hook.
  • The second exterior surface of the second hook has an apex angle closer to the first abutment surface than the distance between the first exterior surface and the second abutment surface.
  • The suspension means comprise at least one elastic block, arranged between the first and the second part.
  • The elastic block is housed in a housing space partly delimited by the first and second hooks.
  • The elastic block extends between first and second plates, at least one of the first and second plates being intended to be fixed to the first or second corresponding part.
  • One of the first or second plates comprises at least one tongue intended to cooperate with a complementary notch provided in the corresponding first or second hook.
  • At least one of the first or second hooks is removably mounted on the corresponding first or second part.

L'invention concerne également un bogie de véhicule ferroviaire, comprenant un châssis et au moins une structure d'essieu, caractérisé en ce qu'il comporte au moins un dispositif de suspension primaire tel que défini précédemment, la première partie étant portée par le châssis et la seconde partie tant portée par la structure d'essieu.The invention also relates to a railway vehicle bogie, comprising a chassis and at least one axle structure, characterized in that it comprises at least one primary suspension device as defined above, the first part being carried by the chassis and the second part carried by the axle structure.

L'invention concerne également un véhicule ferroviaire, caractérisé en ce qu'il comprend au moins un bogie tel que défini ci-dessus.The invention also relates to a railway vehicle, characterized in that it comprises at least one bogie as defined above.

Différents aspects et avantages de l'invention seront mis en lumière dans la description qui va suivre, donnée uniquement à titre d'exemple non limitatif, et faite en se référant aux figures annexées, parmi lesquelles :

  • [Fig 1] La figure 1 représente schématiquement un bogie comprenant un dispositif de suspension primaire selon un exemple de mode de réalisation de l'invention ;
  • [Fig 2] La figure 2 est une vue en perspective représentant plus en détail le dispositif de suspension primaire de la figure 1 ;
  • [Fig 3] La figure 3 est un détail de la figure 2 ;
  • [Fig 4] La figure 4 est une vue de profil du dispositif de suspension de la figure 3, dans lequel la butée de fin de course basse est engagée ;
  • [Fig 5] La figure 5 est une vue similaire à la figure 4, dans lequel la butée de fin de course haute est engagée.
Different aspects and advantages of the invention will be highlighted in the description which follows, given solely by way of non-limiting example, and made with reference to the appended figures, among which:
  • [ Figure 1 ] There figure 1 schematically represents a bogie comprising a primary suspension device according to an exemplary embodiment of the invention;
  • [ Figure 2 ] There figure 2 is a perspective view showing in more detail the primary suspension device of the figure 1 ;
  • [ Figure 3 ] There Figure 3 is a detail of the figure 2 ;
  • [ Figure 4 ] There figure 4 is a profile view of the suspension device of the Figure 3 , in which the bottom end stop is engaged;
  • [ Figure 5 ] There figure 5 is a view similar to the Figure 4 , in which the upper end stop is engaged.

On a représenté, sur la figure 1, un bogie 8 de véhicule ferroviaire, comprenant au moins un dispositif de suspension primaire 10 selon un exemple de mode de réalisation de l'invention. Le bogie 8 est par exemple destiné à équiper un tramway, de préférence à plancher bas.We represented, on the figure 1 , a bogie 8 of a railway vehicle, comprising at least one primary suspension device 10 according to an example embodiment of the invention. The bogie 8 is for example intended to equip a tramway, preferably with a low floor.

Le bogie 8 comporte un châssis 12, destiné à porter une caisse de véhicule ferroviaire par l'intermédiaire d'un dispositif de suspension secondaire 13 de type classique.The bogie 8 comprises a chassis 12, intended to carry a railway vehicle body via a secondary suspension device 13 of conventional type.

Le bogie 8 comprend classiquement deux paires de roues 14, agencées respectivement à l'avant et à l'arrière du bogie 8. Les roues 14 de chaque paire sont reliées l'une à l'autre par une structure d'essieu 16.The bogie 8 conventionally comprises two pairs of wheels 14, arranged respectively at the front and at the rear of the bogie 8. The wheels 14 of each pair are connected to each other by an axle structure 16.

Chaque structure d'essieu 16, représentée plus en détail sur la figure 2, comporte deux boîtes d'essieu 18, à savoir une pour chaque roue 14, ainsi qu'une traverse d'essieu 20 s'étendant transversalement entre les deux boîtes d'essieu 18 et solidaire de ces boîtes d'essieu 18.Each axle structure 16, shown in more detail on the figure 2 , comprises two axle boxes 18, namely one for each wheel 14, as well as an axle crossmember 20 extending transversely between the two axle boxes 18 and secured to these axle boxes 18.

Les structures d'essieu 16 sont portées par le châssis 12 par l'intermédiaire de moyens de suspension primaires 10.The axle structures 16 are carried by the chassis 12 via primary suspension means 10.

Le châssis 12 comporte de préférence deux longerons latéraux 22, s'étendant dans une direction longitudinale X, et deux traverses de châssis 24, notamment une traverse avant et une traverse arrière, s'étendant chacune transversalement entre les longerons latéraux 22 et parallèlement aux traverses d'essieu 20. Seul l'un des longerons est visible sur la figure 1.The chassis 12 preferably comprises two side rails 22, extending in a longitudinal direction axle 20. Only one of the side members is visible on the figure 1 .

De préférence, chaque traverse 24 est solidaire d'un longeron latéral 22 respectif.Preferably, each crosspiece 24 is integral with a respective side beam 22.

Comme indiqué précédemment, le châssis 12 est relié aux structures d'essieu 16 par l'intermédiaire de moyens de suspension primaires 10 qui vont maintenant être décrits. Plus particulièrement, chaque longeron latéral 22 est relié à une boîte d'essieu 18 par l'intermédiaire de ces moyens de suspension primaires 10.As indicated previously, the chassis 12 is connected to the axle structures 16 via primary suspension means 10 which will now be described. More particularly, each side rail 22 is connected to an axle box 18 via these primary suspension means 10.

Comme cela est notamment représenté sur la figure 2, les moyens de suspension primaires 10 comportent, pour chaque boîte d'essieu 18, un bras 26 s'étendant sensiblement longitudinalement entre une première extrémité solidaire de la boîte d'essieu 18 correspondante, et une seconde extrémité libre.As is notably represented on the figure 2 , the primary suspension means 10 comprise, for each axle box 18, an arm 26 extending substantially longitudinally between a first end secured to the corresponding axle box 18, and a second free end.

Chaque bras 26 est articulé autour d'une liaison pivot 28 avec le châssis 12, notamment avec l'un des longerons latéraux 22. La liaison pivot 28 est par exemple formée par une articulation élastique.Each arm 26 is articulated around a pivot connection 28 with the chassis 12, in particular with one of the side rails 22. The pivot connection 28 is for example formed by an elastic articulation.

Les moyens de suspension primaires 10 comportent une première partie 10A, destinée à être solidarisée au châssis 12 du bogie, une seconde partie 10B destinée à être solidarisée à la structure d'essieu 16 du bogie, et des moyens de suspension élastiques 29 reliant la première partie 10A à la seconde partie 10B.The primary suspension means 10 comprise a first part 10A, intended to be secured to the chassis 12 of the bogie, a second part 10B intended to be secured to the axle structure 16 of the bogie, and elastic suspension means 29 connecting the first part 10A to the second part 10B.

La première partie 10A est par exemple formée par un élément rapporté sur le châssis 12, notamment sur l'un des longerons 22. En variante, cet élément est venu de matière avec le longeron 22 correspondant.The first part 10A is for example formed by an element attached to the chassis 12, in particular to one of the longitudinal members 22. Alternatively, this element is made integral with the corresponding longitudinal member 22.

La seconde partie 10B est par exemple formée à l'extrémité libre du bras 26. Dans l'exemple décrit, la seconde partie 10B est venue de matière avec le bras 26.The second part 10B is for example formed at the free end of the arm 26. In the example described, the second part 10B comes integrally with the arm 26.

Les moyens de suspension élastiques 29 comportent, pour chaque bras 26, un bloc élastique 30 s'étendant entre un premier siège ménagé sur première partie 10A, et un second siège ménagé sur la seconde partie 10B. Le bloc élastique 30 présente sensiblement une forme de parallélépipède, par exemple une forme de cube.The elastic suspension means 29 comprise, for each arm 26, an elastic block 30 extending between a first seat provided on the first part 10A, and a second seat provided on the second part 10B. The elastic block 30 has substantially a parallelepiped shape, for example a cube shape.

Le bloc élastique 30 est par exemple réalisé au moins en partie en caoutchouc.The elastic block 30 is for example made at least partly of rubber.

Les premier et second sièges sont de préférence inclinés par rapport à la direction longitudinale X, d'un angle préférentiellement compris entre 20° et 40°.The first and second seats are preferably inclined relative to the longitudinal direction X, at an angle preferably between 20° and 40°.

Avantageusement, chaque bras 26 s'étend sensiblement longitudinalement, de sorte que chaque bloc élastique 30 est déporté sensiblement à hauteur des structures d'essieu 16. L'encombrement vertical des moyens de suspension primaires 10 est donc réduit, notamment par rapport à des suspensions primaires de bogie classiques généralement disposés au-dessus des structures d'essieu.Advantageously, each arm 26 extends substantially longitudinally, so that each elastic block 30 is offset substantially at the height of the axle structures 16. The vertical bulk of the primary suspension means 10 is therefore reduced, in particular compared to suspensions conventional bogie primaries generally arranged above the axle structures.

Le bloc élastique 30 permet d'amortir les mouvements relatifs de la structure d'essieu 16 par rapport au châssis 12 autour de la liaison pivot 28.The elastic block 30 makes it possible to cushion the relative movements of the axle structure 16 relative to the chassis 12 around the pivot connection 28.

Le bloc élastique 30 comporte avantageusement des première 32 et seconde 34 platines d'extrémité, chacune destinée à coopérer avec le premier ou second siège correspondant. Les platines d'extrémité 32, 34 sont par exemple en matière métallique, et solidarisées au caoutchouc de toute manière envisageable.The elastic block 30 advantageously comprises first 32 and second 34 end plates, each intended to cooperate with the first or second corresponding seat. The end plates 32, 34 are for example made of metallic material, and secured to the rubber in any conceivable manner.

De préférence, au moins l'une des première 32 et seconde 34 platines est solidarisée au premier ou second siège correspondant. Cette solidarisation est de préférence amovible, c'est-à-dire que le bloc élastique 30 peut être monté ou démonté sans destruction d'éléments du dispositif de suspension 10. Cette solidarisation amovible sera décrite plus en détail ultérieurement.Preferably, at least one of the first 32 and second 34 plates is secured to the first or second corresponding seat. This connection is preferably removable, that is to say that the elastic block 30 can be mounted or disassembled without destruction of elements of the suspension device 10. This removable connection will be described in more detail later.

Afin de limiter les mouvements de la structure d'essieu 16 par rapport au châssis 12, le dispositif de suspension 10 comporte des moyens 36 de limitation de ces mouvements.In order to limit the movements of the axle structure 16 relative to the chassis 12, the suspension device 10 comprises means 36 for limiting these movements.

Les moyens de limitation 36 comprennent une butée de fin de course haute et une butée de fin de course basse. La butée de fin de course haute est celle limitant un déplacement éloignant les première 10A et seconde 10B parties l'une de l'autre, et la butée de fin de course basse est celle limitant un déplacement rapprochant les première 10A et seconde 10B parties l'une de l'autre.The limiting means 36 include a high end-of-travel stop and a low end-of-travel stop. The upper end-of-travel stop is that limiting a movement moving the first 10A and second 10B parts away from each other, and the lower end-of-travel stop is that limiting a movement bringing the first 10A and second 10B parts closer together. 'one from the other.

Plus particulièrement, conformément à l'invention, les butées de fin de course haute et basse sont formées par au moins un premier crochet 38 porté par la première partie 10A et au moins un second crochet 40 porté par la seconde partie 10B.More particularly, in accordance with the invention, the upper and lower end stops are formed by at least one first hook 38 carried by the first part 10A and at least one second hook 40 carried by the second part 10B.

Les premier 38 et second 40 crochets sont engagés l'un dans l'autre avec jeu, de manière à former les butées de fin de course haute et basse.The first 38 and second 40 hooks are engaged one into the other with play, so as to form the upper and lower end stops.

Plus particulièrement, comme cela est notamment représenté sur la figure 3, le premier crochet 38 comporte un premier corps de crochet 38A comprenant une première surface de butée 39A, et une première tête de crochet 38B courbée de manière à présenter une première surface extérieure 39B et une première surface intérieure 39C. La première surface intérieure 39C est tournée vers la première surface de butée 39A, et la première surface extérieure 39B est opposée à la première surface intérieure 39C.More particularly, as is notably represented on the Figure 3 , the first hook 38 comprises a first hook body 38A comprising a first abutment surface 39A, and a first hook head 38B curved so as to have a first exterior surface 39B and a first interior surface 39C. The first interior surface 39C faces the first abutment surface 39A, and the first exterior surface 39B faces opposite the first interior surface 39C.

Le second crochet 40 comporte un second corps de crochet 40A comprenant une seconde surface de butée 41A, et une seconde tête de crochet 40B comprenant une seconde surface extérieure 41B et une seconde surface intérieure 41C. La seconde surface intérieure 41C est tournée vers la seconde surface de butée 41A, et la seconde surface extérieure 41B est opposée à la seconde surface intérieure 41C.The second hook 40 comprises a second hook body 40A comprising a second abutment surface 41A, and a second hook head 40B comprising a second outer surface 41B and a second inner surface 41C. The second inner surface 41C faces the second abutment surface 41A, and the second outer surface 41B faces opposite the second inner surface 41C.

Les premier 38 et second 40 crochets sont engagés l'un dans l'autre, de sorte que :

  • la seconde surface extérieure 41B du second crochet 40 est agencée en regard de la première surface de butée 39A du premier crochet 38, et la première surface extérieure 39B du premier crochet 38 est agencée en regard de la seconde surface de butée 41A du second crochet 40, et
  • la première surface intérieure 39C du premier crochet 38 est agencée en regard de la seconde surface intérieure 41C du second crochet 40.
The first 38 and second 40 hooks are engaged one in the other, so that:
  • the second outer surface 41B of the second hook 40 is arranged facing the first abutment surface 39A of the first hook 38, and the first outer surface 39B of the first hook 38 is arranged facing the second abutment surface 41A of the second hook 40 , And
  • the first interior surface 39C of the first hook 38 is arranged opposite the second interior surface 41C of the second hook 40.

De préférence, la seconde surface extérieure 41B du second crochet 40 comporte un angle dont le sommet 42 est plus proche de la première surface de butée 39A que la distance entre la première surface extérieure 39B et la seconde surface de butée 41A. Ainsi, lorsque les première 10A et seconde 10B parties se rapprochent, comme cela est représenté sur la figure 4, la seconde surface extérieure 41B (et plus particulièrement son sommet 42) vient en contact avec la première surface de butée 39A alors qu'un jeu subsiste entre la première surface extérieure 39B et la seconde surface de butée 41A. La butée de fin de course basse est donc formée par la seconde surface extérieure 41B du second crochet 40 et la première surface de butée 39A du premier crochet 38.Preferably, the second exterior surface 41B of the second hook 40 has an angle whose apex 42 is closer to the first abutment surface 39A than the distance between the first exterior surface 39B and the second abutment surface 41A. Thus, when the first 10A and second 10B parts approach each other, as is shown on the figure 4 , the second exterior surface 41B (and more particularly its top 42) comes into contact with the first abutment surface 39A while a clearance remains between the first exterior surface 39B and the second abutment surface 41A. The lower end of travel stop is therefore formed by the second exterior surface 41B of the second hook 40 and the first stop surface 39A of the first hook 38.

Ainsi, la première surface extérieure 39B ne vient normalement pas en contact avec la seconde surface de butée 41A, sauf par exemple en cas de rupture du second crochet 40. En variante, les crochets 38, 40 peuvent être dimensionnés pour que les surfaces extérieures 39B, 41B viennent simultanément en butées contre les surfaces de butée 41a, 39A correspondantes.Thus, the first exterior surface 39B does not normally come into contact with the second abutment surface 41A, except for example in the event of breakage of the second hook 40. Alternatively, the hooks 38, 40 can be dimensioned so that the exterior surfaces 39B , 41B simultaneously abut against the corresponding abutment surfaces 41a, 39A.

Comme cela est représenté sur la figure 5, la butée de fin de course haute est formée par les première 39C et second 41C surfaces intérieures venant en contact l'une de l'autre lorsque les première 10A et seconde 10B parties s'éloignent l'une de l'autre.As shown on the figure 5 , the upper end stop is formed by the first 39C and second 41C interior surfaces coming into contact with each other when the first 10A and second 10B parts move away from each other.

Il apparait clairement que la forme des crochets 38, 40 engagés l'un dans l'autre permet de former les butées de fin de course haute et basse avec les mêmes éléments. Les fonctions de butées de fin de course haute et de butée de fin de course basse étant réalisées par les mêmes crochets 38, 40, ces fonctions sont localisées au même endroit, ce qui améliore la compacité du dispositif de suspension primaire 10.It clearly appears that the shape of the hooks 38, 40 engaged one in the other makes it possible to form the upper and lower end stops with the same elements. The upper end-of-travel stop and lower end-of-travel stop functions being performed by the same hooks 38, 40, these functions are located in the same place, which improves the compactness of the primary suspension device 10.

Avantageusement, les premier 38 et second 40 crochets sont fixés de manière amovible sur la première 10A ou seconde 10B partie correspondante, par exemple par vissage. On considère que des moyens de fixation sont amovibles lorsqu'ils permettent un montage et remontage sans destruction de ces moyens de fixation.Advantageously, the first 38 and second 40 hooks are removably fixed on the first 10A or second 10B corresponding part, for example by screwing. Fixing means are considered to be removable when they allow assembly and reassembly without destruction of these fixing means.

Conformément à un mode de réalisation avantageux de l'invention, le bloc élastique 30 est logé dans un espace de logement en partie délimité par les premier 38 et second 40 crochets. Le bloc élastique 30 est ainsi agencé à proximité immédiate des crochets 38, 40, et maintenu dans l'espace de logement par ceux-ci. La compacité du dispositif de suspension 10 est donc optimale.In accordance with an advantageous embodiment of the invention, the elastic block 30 is housed in a housing space partly delimited by the first 38 and second 40 hooks. The elastic block 30 is thus arranged in the immediate vicinity of the hooks 38, 40, and held in the accommodation space by them. The compactness of the suspension device 10 is therefore optimal.

Plus particulièrement, ledit espace de logement est délimité longitudinalement par des rebords 44 et 46 portés par la première partie 10A. La seconde partie 10B pourrait en variante, ou de manière complémentaire, également comporter des rebords délimitant l'espace de logement.More particularly, said housing space is delimited longitudinally by edges 44 and 46 carried by the first part 10A. The second part 10B could alternatively, or in a complementary manner, also include edges delimiting the accommodation space.

L'espace de logement est délimité latéralement, d'une part par une paroi latérale 48, ou tout autre élément, tel qu'un plot, solidaire de la première partie 10A, par exemple ménagée sur le châssis 12, et d'autre part par les crochets 38, 40.The accommodation space is delimited laterally, on the one hand by a side wall 48, or any other element, such as a stud, secured to the first part 10A, for example provided on the chassis 12, and on the other hand by hooks 38, 40.

Les crochets 38, 40 étant amovibles, l'accès à l'espace de logement, notamment pour le remplacement du bloc élastique 30, se fait latéralement lorsque les crochets 38, 40 sont retirés.The hooks 38, 40 being removable, access to the accommodation space, in particular for the replacement of the elastic block 30, is made laterally when the hooks 38, 40 are removed.

Avantageusement, l'une des première 32 ou seconde 34 platines d'extrémité du bloc élastique 30 est solidarisée avec le premier 38 ou second 40 crochet correspondant.Advantageously, one of the first 32 or second 34 end plates of the elastic block 30 is secured to the first 38 or second 40 corresponding hook.

Plus particulièrement, dans l'exemple décrit, la seconde platine d'extrémité 34 est solidarisée au corps 40A du second crochet 40.More particularly, in the example described, the second end plate 34 is secured to the body 40A of the second hook 40.

A cet effet, la seconde platine d'extrémité 34 comporte au moins une languette 50 s'étendant transversalement, de préférence deux languettes 50, et le corps 40A du second crochet 40 comporte, pour chaque languette 50, une encoche 52 complémentaire.For this purpose, the second end plate 34 comprises at least one tongue 50 extending transversely, preferably two tongues 50, and the body 40A of the second hook 40 comprises, for each tongue 50, a complementary notch 52.

Chaque languette 50 est insérée dans l'encoche 52 correspondante, se trouvant ainsi plaquée contre le second siège de la seconde partie 10B par le fond de l'encoche, de préférence sans jeu. Par ailleurs, la languette 50 est immobilisée par les bords de l'encoche 52, sans jeu ou avec un léger jeu de montage. Le bloc élastique 30 se retrouve ainsi bloqué dans toutes les directions par le second crochet 40 :

  • perpendiculairement au second siège par le fond de l'encoche plaquant la seconde platine 34 contre ce second siège,
  • dans un plan parallèle au second siège, et dans une direction transversale, par le second crochet 40 lui-même, le bloc élastique 30 étant maintenu transversalement entre ce second crochet 40 et la paroi latérale 48, et
  • dans le plan parallèle au second siège, et dans la direction de ce plan formant un angle non droit avec la direction longitudinale, par les languettes 50 coopérant avec les bords des encoches 52 correspondantes.
Each tongue 50 is inserted into the corresponding notch 52, thus finding itself pressed against the second seat of the second part 10B by the bottom of the notch, preferably without play. Furthermore, the tongue 50 is immobilized by the edges of the notch 52, without play or with a slight assembly play. The elastic block 30 is thus blocked in all directions by the second hook 40:
  • perpendicular to the second seat by the bottom of the notch pressing the second plate 34 against this second seat,
  • in a plane parallel to the second seat, and in a transverse direction, by the second hook 40 itself, the elastic block 30 being held transversely between this second hook 40 and the side wall 48, and
  • in the plane parallel to the second seat, and in the direction of this plane forming a non-right angle with the longitudinal direction, by the tongues 50 cooperating with the edges of the corresponding notches 52.

On notera que, conformément à ce mode de réalisation préféré, le remplacement du bloc élastique 30 est particulièrement aisé, et peut être réalisée sous le véhicule ferroviaire, sans dépose du bogie.It will be noted that, in accordance with this preferred embodiment, the replacement of the elastic block 30 is particularly easy, and can be carried out under the railway vehicle, without removing the bogie.

A cet effet, au cours d'une première étape, le premier crochet 38 est dévissé et retiré.To this end, during a first step, the first hook 38 is unscrewed and removed.

Au cours d'une seconde étape, les première 10A et seconde 10B parties sont écartées l'une de l'autre, en délestant l'essieu, par exemple en soulevant le châssis de bogie 12 à l'aide de vérins. Au cours de cette étape, le bloc élastique 30 reste accroché à la seconde partie 10B, par le second crochet 40.During a second step, the first 10A and second 10B parts are spaced apart from each other, by unloading the axle, for example by lifting the bogie frame 12 using jacks. During this step, the elastic block 30 remains attached to the second part 10B, by the second hook 40.

Au cours d'une troisième étape, le second crochet 40 est dévissé et retiré, libérant ainsi le bloc élastique 30.During a third step, the second hook 40 is unscrewed and removed, thus releasing the elastic block 30.

Le bloc élastique 30 peut alors être retiré et replacé, au cours d'une quatrième étape.The elastic block 30 can then be removed and replaced, during a fourth step.

Le second crochet 40 est remis en place et revissé au cours d'une cinquième étape, pour maintenir le nouveau bloc élastique 30 contre le second siège de la seconde partie 10B.The second hook 40 is put back in place and screwed back in during a fifth step, to hold the new elastic block 30 against the second seat of the second part 10B.

Au cours d'une sixième étape, les vérins sont relâchés, et les première 10A et seconde 10B parties reviennent prendre leur position initiale.During a sixth step, the cylinders are released, and the first 10A and second 10B parts return to their initial position.

Au cours d'une septième étape, le premier crochet 38 est remis en place et revissé.During a seventh step, the first hook 38 is put back in place and screwed back.

On notera que, pour la première mise en place d'un premier bloc élastique 30, la procédure est sensiblement identique, en remplaçant les première à troisième étapes ci-dessus par un écartement des première 10A et seconde 10B parties.It will be noted that, for the first installation of a first elastic block 30, the procedure is substantially identical, replacing the first to third steps above by a spacing of the first 10A and second 10B parts.

On notera que l'invention n'est pas limitée au mode de réalisation précédemment décrit, mais pourrait présenter diverses variantes sans sortir du cadre des revendications.It will be noted that the invention is not limited to the embodiment described above, but could present various variants without departing from the scope of the claims.

En particulier, l'invention pourrait être appliquée de la même manière à un bogie porteur ou à un bogie moteur.In particular, the invention could be applied in the same way to a carrier bogie or to a motor bogie.

Par ailleurs, le châssis 12 du bogie pourrait présenter une autre structure que celle qui a été précédemment décrite.Furthermore, the chassis 12 of the bogie could have a structure other than that which was previously described.

Enfin, le bogie selon l'invention pourrait équiper tout autre véhicule ferroviaire qu'un tramway, par exemple un métro ou un train grandes lignes.Finally, the bogie according to the invention could equip any railway vehicle other than a tramway, for example a metro or a mainline train.

Il apparait clairement que l'invention permet de réaliser un dispositif de suspension 10 très compact, les fonctions de suspension et de limitation de mouvement étant localisées autour du bloc élastique 30, et demandant peu de pièces puisque ces fonctions sont réalisées par ce bloc élastique 30 et les crochets 38, 40, ces crochets 38, 40 assurant en outre le maintien du bloc élastique 30.It clearly appears that the invention makes it possible to produce a very compact suspension device 10, the suspension and movement limitation functions being located around the elastic block 30, and requiring few parts since these functions are carried out by this elastic block 30 and the hooks 38, 40, these hooks 38, 40 also ensuring the maintenance of the elastic block 30.

Claims (10)

  1. A primary suspension device (10) for a rail vehicle bogie (8), comprising a first part (10A) intended to be secured to a frame (12) of the bogie, a second part (10B) intended to be secured to an axle structure (16) of the bogie (8), and elastic suspension means (29) connecting the first part (10A) to the second part (10B), the primary suspension device (10) comprising means (36) for limiting the displacements of the first (10A) and second (10B) parts relative to each other, the limiting means (36) comprising at least one first hook (38) carried by the first part (10A) and at least one second hook (40) carried by the second part (10B), co-operating to form an upper end-of-travel stop, characterised in that the limiting means (36) comprise a low end-of-travel stop, the first (38) and second (40) hooks being engaged in one another with clearance so as to form the high and low end-of-travel stops.
  2. A primary suspension device (10) according to claim 1, wherein:
    - the first hook (38) comprises a first hook body (38A) including a first abutment surface (39A), and a first hook head (38B) including a first outer surface (39B) and a first inner surface (39C),
    - the second hook (40) comprises a second hook body (40A) including a second abutment surface (41A), and a second hook head (40B) including a second outer surface (41B) and a second inner surface (41C),
    the first (38) and second (40) hooks being engaged in each other so that:
    - the second outer surface (41B) of the second hook (40) is arranged opposite the first abutment surface (39A) of the first hook (38), and the first outer surface (39B) of the first hook (38) is arranged opposite the second abutment surface (41A) of the second hook (40), and
    - the first inner surface (39C) of the first hook (38) is arranged opposite the second inner surface (41C) of the second hook (40).
  3. A primary suspension device (10) according to claim 2, wherein the second outer surface (41B) of the second hook (40) has an angle forming an apex (42) closer to the first abutment surface (39A) than the distance between the first outer surface (39B) and the second abutment surface (41A).
  4. A primary suspension device (10) according to any one of the preceding claims, in which the suspension means (29) comprise at least one elastic block (30), arranged between the first (10A) and second (10B) parts.
  5. A primary suspension device (10) according to claim 4, in which the elastic block (30) is housed in a housing space partly delimited by the first (38) and second (40) hooks.
  6. A primary suspension device (10) according to claim 4 or 5, in which the elastic block (30) extends between the first (32) and second (34) plates, at least one of the first (32) and second (34) plates being intended to be fixed to the corresponding first (10A) or second (10B) part.
  7. A primary suspension device (10) according to claim 6, in which one of the first (32) or second (34) plates comprises at least one tongue (50) intended to cooperate with a complementary notch (52) formed in the corresponding first (38) or second (40) hook.
  8. A primary suspension device (10) according to any one of the preceding claims, in which at least one of the first (38) or second (40) hooks is removably mounted on the corresponding first (10A) or second (10B) part.
  9. A bogie (8) for a rail vehicle, comprising a chassis (12) and at least one axle structure (16), characterised in that it comprises at least one primary suspension device (10) according to any one of the preceding claims, the first part (10A) being carried by the chassis (12) and the second part (10B) being carried by the axle structure (16).
  10. A railway vehicle, characterised in that it comprises at least one bogie (8) according to claim 9.
EP22166629.0A 2021-04-06 2022-04-05 Primary suspension device for a railway vehicle bogie Active EP4071026B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2103487A FR3121414B1 (en) 2021-04-06 2021-04-06 Primary suspension device for a railway vehicle bogie

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EP4071026A1 EP4071026A1 (en) 2022-10-12
EP4071026B1 true EP4071026B1 (en) 2024-02-21

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FR (1) FR3121414B1 (en)

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* Cited by examiner, † Cited by third party
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JP2012224223A (en) * 2011-04-20 2012-11-15 Nippon Sharyo Seizo Kaisha Ltd Railroad vehicle
KR101252546B1 (en) * 2011-04-21 2013-04-08 현대로템 주식회사 dwnward rotation of the axle boxes for railway vehicles blocking device
CN204279471U (en) * 2014-12-01 2015-04-22 南车青岛四方机车车辆股份有限公司 A kind of low-floor rail vehicle integral lifting device
CN205327070U (en) * 2016-01-27 2016-06-22 中车齐齐哈尔车辆有限公司 Bogie of anticreep device and applied this anticreep device
CN110733524A (en) * 2019-10-28 2020-01-31 中车戚墅堰机车有限公司 Novel overturn-preventing device

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FR3121414B1 (en) 2023-04-07
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