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EP2676859B1 - Bogie for railway vehicle with improved suspension, in particular for a low floor tramway - Google Patents

Bogie for railway vehicle with improved suspension, in particular for a low floor tramway Download PDF

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Publication number
EP2676859B1
EP2676859B1 EP13170993.3A EP13170993A EP2676859B1 EP 2676859 B1 EP2676859 B1 EP 2676859B1 EP 13170993 A EP13170993 A EP 13170993A EP 2676859 B1 EP2676859 B1 EP 2676859B1
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EP
European Patent Office
Prior art keywords
bogie
chassis
axle
rail
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13170993.3A
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German (de)
French (fr)
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EP2676859A1 (en
Inventor
Alain Rodet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alstom Transport Technologies SAS
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Alstom Transport Technologies SAS
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Publication date
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Priority to PL13170993T priority Critical patent/PL2676859T3/en
Publication of EP2676859A1 publication Critical patent/EP2676859A1/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
    • B61F5/50—Other details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D13/00—Tramway vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F3/00—Types of bogies
    • B61F3/02—Types of bogies with more than one axle
    • B61F3/04—Types of bogies with more than one axle with driven axles or wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
    • B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
    • 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
    • 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
    • B61F5/32—Guides, e.g. plates, for axle-boxes
    • B61F5/325—The guiding device including swinging arms or the like to ensure the parallelism of the axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
    • B61F5/50—Other details
    • B61F5/52—Bogie frames

Definitions

  • the present invention relates to a bogie rail vehicle with improved suspensions, especially for a low-floor tram.
  • the document FR 1 394 160 describes a bogie according to the preamble of claim 1.
  • a railway vehicle bogie comprising two pairs of wheels, the wheels of each pair being connected to each other by an axle structure.
  • the bogie further comprises an articulated frame carrying the axle structures via primary suspension means.
  • a chassis is called “articulated” when it comprises two parts (or half-frame) articulated relative to each other about an axis.
  • Such an articulated frame makes it possible to limit wheel discharges induced by track defects (also called “left”).
  • track defects also called “left”
  • the articulated frame allows the bogie to cross the left, that is to say it may have ground support points that are not in the same rolling plane.
  • the vertical size of the suspensions must be relatively small.
  • the suspensions are generally formed by elastic members of elastomer, in particular rubber, which are compact.
  • the object of the invention is in particular to remedy this drawback by providing a railway vehicle bogie whose suspensions remain effective whatever their temperature, and whose suspensions have a satisfactory service life, all while maintaining a reduced vertical space requirement in order to the bogie can equip a low-floor railway vehicle.
  • the subject of the invention is a railway vehicle bogie, in particular a low-floor tram, according to claim 1.
  • the arms of the axle structure extend longitudinally, so that the primary coil springs are deported substantially at the same height as the axle structures, unlike bogies of the state of the art in which the primary suspensions are usually arranged above the axle structures.
  • the bogie according to the invention comprises helical springs, while maintaining a reduced size in height, despite the fact that the coil springs are generally considered more bulky than elastomeric elastic members.
  • the chassis of the bogie is articulated, so that it allows the bogie to cross the track defects, or left, unhindered, as indicated above.
  • the bogie according to the invention may comprise primary suspensions which work only in a vertical direction. Such primary suspensions reduced bulk and complexity compared to primary suspensions rigid chassis bogie.
  • the invention also relates to a railway vehicle, in particular a low-floor tramway, comprising a bogie as defined above.
  • a horizontal plane is substantially parallel to the plane in which the axles extend and the vertical plane is substantially parallel to the plane in which the wheels extend.
  • longitudinal is defined in relation to the direction in which a railway vehicle extends in a horizontal plane
  • transverse is defined according to a direction substantially perpendicular to the longitudinal direction in a horizontal plane.
  • a reference numeral is shown in the figures, in which the longitudinal direction is designated by the reference X, the transverse direction is designated by the reference Y, and the vertical direction, perpendicular to the longitudinal X and transverse Y directions, is designated by the reference Z.
  • front and rear are defined with respect to the direction of movement of the railway vehicle in the longitudinal direction X.
  • front corresponds to the left and the term “rear” " to the right.
  • the bogie 10 comprises two pairs 12 of wheels 14, respectively arranged at the front and at the rear of the bogie 10.
  • the wheels 14 of each pair are connected to each other by an axle structure 16.
  • Each axle structure 16 comprises two axle boxes 18, namely one for each wheel 14, and an axle crossmember 20 extending transversely between the two axle boxes 18 and secured to these boxes.
  • Each axle beam 20 carries an axle shaft 22 extending transversely between the wheels 14 and integral with these wheels 14.
  • the axle boxes 18 and the axle cross member 20 form an axle 18.
  • one-piece assembly, rigid in flexion and torsion about the axle axis, and the axle shaft 22 ensures the transmission between the two wheels 14 of the axle.
  • axle structures 16 are carried by an articulated frame 24 via primary suspension means 26 which will be described later.
  • the frame 24 is said to be of the inner type, that is to say that it is arranged in a space delimited by the wheels 14.
  • Such an inner frame has a reduced mass, and a low cost of manufacturing.
  • the chassis 24 comprises two side rails 28 and two chassis cross members, in particular a front crossmember 30 and a rear crossmember 32, each extending transversely between the side rails 28.
  • a first spar among the side spars 28 will be called right spar, and the other spar will be called left spar. Only the right spar is visible on the figure 1 .
  • Each crosspiece 30, 32 is integral with a respective lateral spar 28, and articulated around a pivot connection with the other spar 28, of axis parallel to a general direction in which the spar 28 extends with which it is Speak clearly.
  • the general direction of the spar 28 is substantially parallel to the longitudinal direction X.
  • the front cross member 30 is secured to the right spar 28, and the rear cross member 32 is hinged about a pivot connection 34 with the right spar. Furthermore, the rear cross member 32 is integral with the left spar, and the front cross member 30 is hinged about a pivot connection 36 with the left spar.
  • the frame 24 has two L-shaped portions, each L-shaped portion being formed by a cross member and a respective spar. These two L-shaped portions are articulated with respect to each other substantially about a diagonal axis passing through the pivot links 34, 36.
  • each lateral spar 28 is connected to an axle box 18 via these primary suspension means 26.
  • the suspension means 26 comprise, for each axle box 18, an arm 38 extending substantially longitudinally between a first end 38A integral with the corresponding axle box 18, and a second end 38B free.
  • Each arm 38 is articulated around a pivot connection 40 with the frame 24, in particular with one of the side rails 28.
  • the primary suspension means 26 further comprise, for each arm 38, a primary coil spring 42 extending between a first seat 42A, formed on the second end 38B of the arm 38, and a second seat 42B, carried by the frame 24 , in particular by the lateral spar 28 corresponding.
  • each arm 38 extends substantially longitudinally, so that each primary coil spring 42 is deported substantially at the height of the axle structures 16.
  • the vertical space of the primary suspension means 42 is therefore reduced, in particular with respect to conventional bogie primary suspensions, which are usually arranged above the axle structures.
  • each primary helical spring 42 extends in a substantially vertical direction Z, that is to say substantially perpendicular to the general direction in which extends the spar 28 carrying the second seat 42B for this primary coil spring 42.
  • Z substantially vertical direction
  • the frame 24 since the frame 24 is articulated, it is the articulation of this frame 24 around the diagonal passing through the joints 34 and 36 which allows limit the wheel discharges induced by track defects, and not the axles 16 associated with the primary suspension means 26, these primary suspension means 26 can thus be adapted to work only in the vertical direction Z.
  • the primary suspension 26 allows a relative vertical displacement of the axle structure 16 relative to the frame 24, that is to say that the axle structure 16 is suspended relative to the frame 24 in a substantially vertical direction Z, and mobile in rotation about an axis passing through the pivot links 40.
  • each motor 44 is connected to at least one of the wheels 14 via a gearbox 46 and a coupling connecting the motor 44 to the gearbox 46.
  • the bogie 10 also comprises secondary suspension means 48, allowing relative vertical displacement of the bogie 10 relative to the railway vehicle on which said bogie 10 is mounted.
  • the bogie 10 comprises a load cross member 50 of conventional type, intended to carry a box of the railway vehicle.
  • the secondary suspension means 48 comprise, for each of the lateral spars 28, at least one secondary helical spring 52, for example two secondary helical springs 52 arranged in parallel, each extending between a first seat 52A formed on the spar 28, and a second seat 52B formed on the load crossbar 50.
  • each secondary helical spring 52 extends in a substantially vertical direction Z, that is to say a direction substantially perpendicular to the general direction in which extends the spar 28 carrying the first seat 52A for the secondary coil spring 52.
  • the invention could be applied to a bogie carrier, not including a motor.
  • the articulated chassis of the bogie could have another articulated structure than that which has been previously described.
  • the bogie according to the invention could equip any other rail vehicle that a tram, for example a metro or a mainline train.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Vehicle Body Suspensions (AREA)
  • Springs (AREA)

Description

La présente invention concerne un bogie de véhicule ferroviaire à suspensions perfectionnées, notamment pour un tramway à plancher bas. Le document FR 1 394 160 décrit un bogie conforme au préambule de la revendication 1.The present invention relates to a bogie rail vehicle with improved suspensions, especially for a low-floor tram. The document FR 1 394 160 describes a bogie according to the preamble of claim 1.

On connaît déjà dans l'état de la technique, notamment d'après FR 2 946 307 , un bogie de véhicule ferroviaire comprenant deux paires de roues, les roues de chaque paire étant reliées l'une à l'autre par une structure d'essieu. Le bogie comporte par ailleurs un châssis articulé, portant les structures d'essieu par l'intermédiaire de moyens de suspension primaires.We already know in the state of the art, in particular according to FR 2 946 307 , a railway vehicle bogie comprising two pairs of wheels, the wheels of each pair being connected to each other by an axle structure. The bogie further comprises an articulated frame carrying the axle structures via primary suspension means.

On notera qu'un châssis est dit « articulé » lorsqu'il comporte deux parties (ou demi-châssis) articulées l'une par rapport à l'autre autour d'un axe. Un tel châssis articulé permet de limiter les déchargements de roues induits par des défauts de voies (également appelés « gauches »). Ainsi, le châssis articulé permet au bogie de franchir des gauches, c'est-à-dire qu'il peut présenter des points d'appui au sol qui ne sont pas dans un même plan de roulement.Note that a chassis is called "articulated" when it comprises two parts (or half-frame) articulated relative to each other about an axis. Such an articulated frame makes it possible to limit wheel discharges induced by track defects (also called "left"). Thus, the articulated frame allows the bogie to cross the left, that is to say it may have ground support points that are not in the same rolling plane.

Lorsque le bogie est destiné à équiper un véhicule ferroviaire à plancher bas, l'encombrement vertical des suspensions doit être relativement réduit. A cet effet, les suspensions sont généralement formées par des organes élastiques en élastomère, notamment en caoutchouc, qui sont peu encombrants.When the bogie is intended to equip a low floor railway vehicle, the vertical size of the suspensions must be relatively small. For this purpose, the suspensions are generally formed by elastic members of elastomer, in particular rubber, which are compact.

Toutefois, de tels organes en élastomère perdent en efficacité au cours du temps. En outre, l'efficacité de ces organes en élastomère est également réduite lorsque leur température est très élevée ou très basse, ce qui peut survenir lorsque le véhicule ferroviaire circule dans un pays à climat chaud, ou froid.However, such elastomeric bodies lose effectiveness over time. In addition, the effectiveness of these elastomeric members is also reduced when their temperature is very high or very low, which can occur when the railway vehicle is traveling in a country with a hot climate, or cold.

L'invention a notamment pour but de remédier à cet inconvénient en fournissant un bogie de véhicule ferroviaire dont les suspensions restent efficaces quelle que soit leur température, et dont les suspensions présentent une durée de vie satisfaisante, le tout en conservant un encombrement vertical réduit afin que le bogie puisse équiper un véhicule ferroviaire à plancher bas.The object of the invention is in particular to remedy this drawback by providing a railway vehicle bogie whose suspensions remain effective whatever their temperature, and whose suspensions have a satisfactory service life, all while maintaining a reduced vertical space requirement in order to the bogie can equip a low-floor railway vehicle.

A cet effet, l'invention a pour objet un bogie de véhicule ferroviaire, notamment de tramway à plancher bas, selon la revendication 1.For this purpose, the subject of the invention is a railway vehicle bogie, in particular a low-floor tram, according to claim 1.

Les bras de la structure d'essieu s'étendent longitudinalement, de sorte que les ressorts hélicoïdaux primaires sont déportés sensiblement à la même hauteur que les structures d'essieu, contrairement à des bogies de l'état de la technique dans lesquels les suspensions primaires sont habituellement agencées au-dessus des structures d'essieu.The arms of the axle structure extend longitudinally, so that the primary coil springs are deported substantially at the same height as the axle structures, unlike bogies of the state of the art in which the primary suspensions are usually arranged above the axle structures.

Ainsi, le bogie selon l'invention comporte des ressorts hélicoïdaux, tout en conservant un encombrement réduit en hauteur, malgré le fait que les ressorts hélicoïdaux sont généralement considérés comme plus encombrants que des organes élastiques en élastomère.Thus, the bogie according to the invention comprises helical springs, while maintaining a reduced size in height, despite the fact that the coil springs are generally considered more bulky than elastomeric elastic members.

Avantageusement, le châssis du bogie est articulé, si bien qu'il permet au bogie de franchir les défauts de voie, ou gauches, sans encombre, comme indiqué précédemment. Dans ce cas, le bogie selon l'invention peut comporter des suspensions primaires qui ne travaillent que selon une direction verticale. De telles suspensions primaires présentent un encombrement et une complexité réduits par rapport à des suspensions primaires de bogie à châssis rigide.Advantageously, the chassis of the bogie is articulated, so that it allows the bogie to cross the track defects, or left, unhindered, as indicated above. In this case, the bogie according to the invention may comprise primary suspensions which work only in a vertical direction. Such primary suspensions reduced bulk and complexity compared to primary suspensions rigid chassis bogie.

Un bogie selon l'invention peut comporter en outre l'une ou plusieurs des caractéristiques suivantes, prises seules ou selon toutes les combinaisons techniquement possibles.

  • Chaque ressort hélicoïdal primaire s'étend selon une direction sensiblement perpendiculaire à la direction générale dans laquelle s'étend le longeron portant le second siège pour ce ressort hélicoïdal primaire.
  • Au moins l'un parmi les longerons latéraux porte un moteur, ce moteur étant relié à au moins l'une des roues par l'intermédiaire d'un réducteur.
  • Le bogie comporte : une traverse de charge, destinée à porter une caisse de véhicule ferroviaire, et des moyens de suspension secondaires, comportant, pour chacun des longerons latéraux, au moins un ressort hélicoïdal secondaire s'étendant entre un premier siège, ménagé sur ce longeron, et un second siège, ménagé sur la traverse de charge.
  • Chaque ressort hélicoïdal secondaire s'étend selon une direction sensiblement perpendiculaire à la direction générale dans laquelle s'étend le longeron portant le premier siège pour ce ressort hélicoïdal secondaire.
  • Chaque structure d'essieu comporte une traverse d'essieu, s'étendant entre les boîtes d'essieu de cette structure d'essieu, et portant un arbre d'essieu solidaire des roues entre lesquelles s'étend cette structure d'essieu.
A bogie according to the invention may further comprise one or more of the following characteristics, taken alone or in any technically possible combination.
  • Each primary helical spring extends in a direction substantially perpendicular to the general direction in which extends the spar carrying the second seat for this primary coil spring.
  • At least one of the side rails carries a motor, the motor being connected to at least one of the wheels via a reducer.
  • The bogie comprises: a load crossbar, intended to carry a railway vehicle body, and secondary suspension means, comprising, for each of the side rails, at least one secondary coil spring extending between a first seat, formed on it spar, and a second seat, formed on the load crossbar.
  • Each secondary helical spring extends in a direction substantially perpendicular to the general direction in which extends the spar bearing the first seat for the secondary coil spring.
  • Each axle structure comprises an axle beam, extending between the axle boxes of this axle structure, and carrying an axle shaft integral with the wheels between which this axle structure extends.

L'invention concerne également un véhicule ferroviaire, notamment de tramway à plancher bas, comportant un bogie tel que défini précédemment.The invention also relates to a railway vehicle, in particular a low-floor tramway, comprising a bogie as defined above.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple et faite en se référant aux figures annexées parmi lesquelles :

  • la figure 1 est une vue en perspective d'un bogie de véhicule ferroviaire selon un exemple de mode de réalisation de l'invention ; et
  • la figure 2 est une vue en coupe du bogie de la figure 1, dans un plan de coupe Il longitudinal passant par les suspensions du bogie.
The invention will be better understood on reading the description which follows, given solely by way of example and with reference to the appended figures in which:
  • the figure 1 is a perspective view of a railway vehicle bogie according to an exemplary embodiment of the invention; and
  • the figure 2 is a sectional view of the bogie of the figure 1 , in a longitudinal cutting plane Il passing through the suspensions of the bogie.

Dans la présente description, les termes « vertical » et « horizontal » sont définis par rapport à un bogie monté dans un véhicule ferroviaire. Ainsi, un plan horizontal est sensiblement parallèle au plan dans lequel s'étendent les essieux et le plan vertical est sensiblement parallèle au plan dans lequel s'étendent les roues.In the present description, the terms "vertical" and "horizontal" are defined with respect to a bogie mounted in a railway vehicle. Thus, a horizontal plane is substantially parallel to the plane in which the axles extend and the vertical plane is substantially parallel to the plane in which the wheels extend.

Le terme « longitudinal » est défini par rapport à la direction dans laquelle s'étend un véhicule ferroviaire dans un plan horizontal, et le terme « transversal » est défini selon une direction sensiblement perpendiculaire à la direction longitudinale dans un plan horizontal.The term "longitudinal" is defined in relation to the direction in which a railway vehicle extends in a horizontal plane, and the term "transverse" is defined according to a direction substantially perpendicular to the longitudinal direction in a horizontal plane.

On a représenté sur les figures un repère, dans lequel la direction longitudinale est désignée par la référence X, la direction transversale est désignée par la référence Y, et la direction verticale, perpendiculaire aux directions longitudinale X et transversale Y, est désignée par la référence Z.A reference numeral is shown in the figures, in which the longitudinal direction is designated by the reference X, the transverse direction is designated by the reference Y, and the vertical direction, perpendicular to the longitudinal X and transverse Y directions, is designated by the reference Z.

Par ailleurs, les termes « avant » et « arrière » sont définis par rapport au sens de déplacement du véhicule ferroviaire dans la direction longitudinale X. Par convention, sur les figures, le terme « avant » correspond à la gauche et le terme « arrière » à la droite.Furthermore, the terms "front" and "rear" are defined with respect to the direction of movement of the railway vehicle in the longitudinal direction X. By convention, in the figures, the term "front" corresponds to the left and the term "rear" " to the right.

On a représenté sur la figure 1 un bogie 10 de véhicule ferroviaire, par exemple pour un tramway à plancher bas (non représenté).We have shown on the figure 1 a railway vehicle bogie 10, for example for a low-floor tram (not shown).

Le bogie 10 comprend deux paires 12 de roues 14, agencées respectivement à l'avant et à l'arrière du bogie 10. Les roues 14 de chaque paire sont reliées l'une à l'autre par une structure d'essieu 16.The bogie 10 comprises two pairs 12 of wheels 14, respectively arranged at the front and at the rear of the bogie 10. The wheels 14 of each pair are connected to each other by an axle structure 16.

Chaque structure d'essieu 16 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. Chaque traverse d'essieu 20 porte un arbre d'essieu 22 s'étendant transversalement entre les roues 14 et solidaires de ces roues 14. De manière classique, les boîtes d'essieu 18 et la traverse d'essieu 20 forment un ensemble monobloc, rigide en flexion et en torsion autour de l'axe d'essieu, et l'arbre 22 d'essieu assure la transmission entre les deux roues 14 de l'essieu.Each axle structure 16 comprises two axle boxes 18, namely one for each wheel 14, and an axle crossmember 20 extending transversely between the two axle boxes 18 and secured to these boxes. axle 18. Each axle beam 20 carries an axle shaft 22 extending transversely between the wheels 14 and integral with these wheels 14. In a conventional manner, the axle boxes 18 and the axle cross member 20 form an axle 18. one-piece assembly, rigid in flexion and torsion about the axle axis, and the axle shaft 22 ensures the transmission between the two wheels 14 of the axle.

Les structures d'essieu 16 sont portées par un châssis articulé 24 par l'intermédiaire de moyens de suspension primaires 26 qui seront décrits ultérieurement.The axle structures 16 are carried by an articulated frame 24 via primary suspension means 26 which will be described later.

Dans l'exemple représenté, le châssis 24 est dit du type intérieur, c'est-à-dire qu'il est disposé dans un espace délimité par les roues 14. Un tel châssis intérieur présente une masse réduite, et un faible coût de fabrication.In the example shown, the frame 24 is said to be of the inner type, that is to say that it is arranged in a space delimited by the wheels 14. Such an inner frame has a reduced mass, and a low cost of manufacturing.

Le châssis 24 comporte deux longerons latéraux 28 et deux traverses de châssis, notamment une traverse avant 30 et une traverse arrière 32, s'étendant chacune transversalement entre les longerons latéraux 28.The chassis 24 comprises two side rails 28 and two chassis cross members, in particular a front crossmember 30 and a rear crossmember 32, each extending transversely between the side rails 28.

Dans ce qui suit, un premier longeron parmi les longerons latéraux 28 sera appelé longeron droit, et l'autre longeron sera appelé longeron gauche. Seul le longeron droit est visible sur la figure 1.In what follows, a first spar among the side spars 28 will be called right spar, and the other spar will be called left spar. Only the right spar is visible on the figure 1 .

Chaque traverse 30, 32 est solidaire d'un longeron latéral 28 respectif, et articulé autour d'une liaison pivot avec l'autre longeron 28, d'axe parallèle à une direction générale dans laquelle s'étend le longeron 28 avec lequel il est articulé. En l'absence de défaut de voie, la direction générale du longeron 28 est sensiblement parallèle à la direction longitudinale X.Each crosspiece 30, 32 is integral with a respective lateral spar 28, and articulated around a pivot connection with the other spar 28, of axis parallel to a general direction in which the spar 28 extends with which it is Speak clearly. In the absence of track defect, the general direction of the spar 28 is substantially parallel to the longitudinal direction X.

Dans l'exemple décrit, la traverse avant 30 est solidaire du longeron droit 28, et la traverse arrière 32 est articulée autour d'une liaison pivot 34 avec ce longeron droit. Par ailleurs, la traverse arrière 32 est solidaire du longeron gauche, et la traverse avant 30 est articulée autour d'une liaison pivot 36 avec ce longeron gauche.In the example described, the front cross member 30 is secured to the right spar 28, and the rear cross member 32 is hinged about a pivot connection 34 with the right spar. Furthermore, the rear cross member 32 is integral with the left spar, and the front cross member 30 is hinged about a pivot connection 36 with the left spar.

Ainsi, le châssis 24 comporte deux parties en forme de L, chaque partie en forme de L étant formée par une traverse et un longeron respectif. Ces deux parties en forme de L sont articulées l'une par rapport à l'autre sensiblement autour d'un axe diagonal passant par les liaisons pivot 34, 36.Thus, the frame 24 has two L-shaped portions, each L-shaped portion being formed by a cross member and a respective spar. These two L-shaped portions are articulated with respect to each other substantially about a diagonal axis passing through the pivot links 34, 36.

On notera qu'un châssis articulé similaire à celui de l'invention est par exemple décrit dans EP 0 834 435 .Note that an articulated frame similar to that of the invention is for example described in EP 0 834 435 .

Comme indiqué précédemment, le châssis 24 est relié aux structures d'essieu 16 par l'intermédiaire de moyens de suspension primaires 26 qui vont maintenant être décrits. Plus particulièrement, chaque longeron latéral 28 est relié à une boîte d'essieu 18 par l'intermédiaire de ces moyens de suspension primaires 26.As indicated above, the frame 24 is connected to the axle structures 16 via primary suspension means 26 which will now be described. More particularly, each lateral spar 28 is connected to an axle box 18 via these primary suspension means 26.

Comme cela est notamment représenté sur la figure 2, les moyens de suspension 26 comportent, pour chaque boîte d'essieu 18, un bras 38 s'étendant sensiblement longitudinalement entre une première extrémité 38A solidaire de la boîte d'essieu 18 correspondante, et une seconde extrémité 38B libre. Chaque bras 38 est articulé autour d'une liaison pivot 40 avec le châssis 24, notamment avec l'un des longerons latéraux 28.As shown in particular on the figure 2 , the suspension means 26 comprise, for each axle box 18, an arm 38 extending substantially longitudinally between a first end 38A integral with the corresponding axle box 18, and a second end 38B free. Each arm 38 is articulated around a pivot connection 40 with the frame 24, in particular with one of the side rails 28.

Les moyens de suspension primaires 26 comportent par ailleurs, pour chaque bras 38, un ressort hélicoïdal primaire 42 s'étendant entre un premier siège 42A, ménagé sur la seconde extrémité 38B du bras 38, et un second siège 42B, porté par le châssis 24, notamment par le longeron latéral 28 correspondant.The primary suspension means 26 further comprise, for each arm 38, a primary coil spring 42 extending between a first seat 42A, formed on the second end 38B of the arm 38, and a second seat 42B, carried by the frame 24 , in particular by the lateral spar 28 corresponding.

Comme indiqué précédemment, chaque bras 38 s'étend sensiblement longitudinalement, de sorte que chaque ressort hélicoïdal primaire 42 est déporté sensiblement à hauteur des structures d'essieu 16. L'encombrement vertical des moyens de suspension primaires 42 est donc réduit, notamment par rapport à des suspensions primaires de bogie classiques, qui sont habituellement disposés au dessus des structures d'essieu.As indicated above, each arm 38 extends substantially longitudinally, so that each primary coil spring 42 is deported substantially at the height of the axle structures 16. The vertical space of the primary suspension means 42 is therefore reduced, in particular with respect to conventional bogie primary suspensions, which are usually arranged above the axle structures.

Avantageusement, chaque ressort hélicoïdal primaire 42 s'étend selon une direction sensiblement verticale Z, c'est-à-dire sensiblement perpendiculaire à la direction générale dans laquelle s'étend le longeron 28 portant le second siège 42B pour ce ressort hélicoïdal primaire 42. En effet, puisque le châssis 24 est articulé, c'est l'articulation de ce châssis 24 autour de la diagonale passant par les articulations 34 et 36 qui permet de limiter les déchargements de roues induits par des défauts de voies, et non les essieux 16 associés aux moyens de suspension primaires 26, ces moyens de suspension primaires 26 pouvant ainsi être adaptés pour travailler uniquement selon la direction verticale Z.Advantageously, each primary helical spring 42 extends in a substantially vertical direction Z, that is to say substantially perpendicular to the general direction in which extends the spar 28 carrying the second seat 42B for this primary coil spring 42. Indeed, since the frame 24 is articulated, it is the articulation of this frame 24 around the diagonal passing through the joints 34 and 36 which allows limit the wheel discharges induced by track defects, and not the axles 16 associated with the primary suspension means 26, these primary suspension means 26 can thus be adapted to work only in the vertical direction Z.

Ainsi, la suspension primaire 26 permet un déplacement vertical relatif de la structure d'essieu 16 par rapport au châssis 24, c'est-à-dire que la structure d'essieu 16 est suspendue par rapport au châssis 24 selon une direction sensiblement verticale Z, et mobile en rotation autour d'un axe passant par les liaisons pivots 40.Thus, the primary suspension 26 allows a relative vertical displacement of the axle structure 16 relative to the frame 24, that is to say that the axle structure 16 is suspended relative to the frame 24 in a substantially vertical direction Z, and mobile in rotation about an axis passing through the pivot links 40.

Dans le cas où le bogie 10 est un bogie moteur, au moins l'un parmi les longerons latéraux 28 porte un moteur 44. De manière classique, chaque moteur 44 est relié à au moins l'une des roues 14 par l'intermédiaire d'un réducteur 46 et d'un accouplement raccordant le moteur 44 au réducteur 46.In the case where the bogie 10 is a bogie engine, at least one of the side rails 28 carries a motor 44. Conventionally, each motor 44 is connected to at least one of the wheels 14 via a gearbox 46 and a coupling connecting the motor 44 to the gearbox 46.

Le bogie 10 comporte par ailleurs des moyens de suspension secondaires 48, permettant un déplacement vertical relatif du bogie 10 par rapport au véhicule ferroviaire sur lequel ledit bogie 10 est monté.The bogie 10 also comprises secondary suspension means 48, allowing relative vertical displacement of the bogie 10 relative to the railway vehicle on which said bogie 10 is mounted.

Ainsi, le bogie 10 comporte une traverse de charge 50 de type classique, destinée à porter une caisse du véhicule ferroviaire.Thus, the bogie 10 comprises a load cross member 50 of conventional type, intended to carry a box of the railway vehicle.

Les moyens de suspension secondaires 48 comportent, pour chacun des longerons latéraux 28, au moins un ressort hélicoïdal secondaire 52, par exemple deux ressorts hélicoïdaux secondaires 52 agencés en parallèle, s'étendant chacun entre un premier siège 52A ménagé sur le longeron 28, et un second siège 52B ménagé sur la traverse de charge 50.The secondary suspension means 48 comprise, for each of the lateral spars 28, at least one secondary helical spring 52, for example two secondary helical springs 52 arranged in parallel, each extending between a first seat 52A formed on the spar 28, and a second seat 52B formed on the load crossbar 50.

Avantageusement, chaque ressort hélicoïdal secondaire 52 s'étend dans une direction sensiblement verticale Z, c'est-à-dire une direction sensiblement perpendiculaire à la direction générale dans laquelle s'étend le longeron 28 portant le premier siège 52A pour ce ressort hélicoïdal secondaire 52.Advantageously, each secondary helical spring 52 extends in a substantially vertical direction Z, that is to say a direction substantially perpendicular to the general direction in which extends the spar 28 carrying the first seat 52A for the secondary coil spring 52.

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.Note that the invention is not limited to the embodiment described above, but could have various variants without departing from the scope of the claims.

En particulier, l'invention pourrait être appliquée à un bogie porteur, ne comportant pas de moteur.In particular, the invention could be applied to a bogie carrier, not including a motor.

Par ailleurs, le châssis articulé du bogie pourrait présenter une autre structure articulée que celle qui a été précédemment décrite.Furthermore, the articulated chassis of the bogie could have another articulated structure than that which has been 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 other rail vehicle that a tram, for example a metro or a mainline train.

Claims (7)

  1. A bogie (10) of a railway vehicle, in particular for a low floor tram, comprising of the following:
    - two pairs (12) of wheels (14), the wheels (14) of each pair (12) being connected to each other by an axle structure (16), said axle structure (16) comprising, for each wheel (14) of the corresponding pair (12), an axle box (18), and
    - an articulated chassis (24), each axle structure (16) being supported by the chassis (24) by way of the primary suspension means (26),
    and wherein the primary suspension means (26) includes the following :
    - for each wheel (14), an arm (38) extending substantially longitudinally between a first end (38A) that is integrally joined with the axle box (18) associated with this wheel (14), and a second free end (38B), the arm (38) being articulated between its first (38A) and second (38B) ends about a pivot connection (40) with the chassis (24), and
    - for each arm (38), a primary helical spring (42) extending between a first seat (42A) provided on the second end (38B) of said arm (38), and a second seat (42B) carried by the chassis (24),
    and wherein the chassis (24) includes :
    - two lateral rails (28), each carrying at least the second seat (42B) for one of the primary helical springs (42),
    characterized in that the chassis (24) also includes:
    - a chassis front cross bar (30) extending transversely between the lateral rails (28), and
    - a chassis rear cross bar (32) extending transversely between the lateral rails (28),
    and wherein :
    - the chassis front cross bar (30) is integrally attached to a first rail among the lateral rails (28), and the rear cross bar (32) is articulated about a pivot connection (34) with this first rail, with an axis parallel to a general direction in which this first rail extends, and
    - the chassis rear cross bar (32) is integrally attached to a second rail among the lateral rails (28), and the front cross bar (30) is articulated about a pivot connection (36) with this second rail, with an axis parallel to a general direction in which this second rail extends.
  2. The bogie (10) according to claim 1, wherein each primary helical spring (42) extends in a direction substantially perpendicular to the general direction in which extends the rail (28) bearing the second seat (42B) for this primary helical spring (42).
  3. The bogie (10) according to claim 1 or 2, wherein at least one amongst the lateral rails (28) has a motor (44), this motor being connected to at least one of the wheels (14) by means of a reduction gear (46).
  4. The bogie (10) according to one of claims 1 to 3, comprising:
    - a load bearing cross member (50), designed for carrying a railway vehicle body,
    - secondary suspension means (48), including, for each of the lateral rails (28), at least one secondary helical spring (52) extending between a first seat (52A), provided on this rail (28), and a second seat (52B), provided on the load bearing cross member (50).
  5. The bogie (10) according to claim 4, wherein each secondary helical spring (52) extends along a direction substantially perpendicular to the general direction in which extends the rail (28) carrying the first seat (52A) for this secondary helical spring (52).
  6. The bogie (10) according to claim 1, wherein each axle structure (16) includes an axle cross member (20) extending between the axle boxes (18) of this axle structure (16) and bearing an axle shaft (22) integrally attached to the wheels (14) between which extends this axle structure (16).
  7. A railway vehicle, in particular a low floor tram, characterised in that it comprises at least one bogie according to one of claims 1 to 6.
EP13170993.3A 2012-06-18 2013-06-07 Bogie for railway vehicle with improved suspension, in particular for a low floor tramway Active EP2676859B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL13170993T PL2676859T3 (en) 2012-06-18 2013-06-07 Bogie for railway vehicle with improved suspension, in particular for a low floor tramway

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1255669A FR2991956B1 (en) 2012-06-18 2012-06-18 BOGIE OF A RAILWAY VEHICLE HAVING IMPROVED SUSPENSIONS, IN PARTICULAR FOR A LOW FLOOR TRAMWAY

Publications (2)

Publication Number Publication Date
EP2676859A1 EP2676859A1 (en) 2013-12-25
EP2676859B1 true EP2676859B1 (en) 2015-09-02

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EP13170993.3A Active EP2676859B1 (en) 2012-06-18 2013-06-07 Bogie for railway vehicle with improved suspension, in particular for a low floor tramway

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US (1) US9096240B2 (en)
EP (1) EP2676859B1 (en)
CN (1) CN103507822B (en)
CA (1) CA2819064C (en)
ES (1) ES2552006T3 (en)
FR (1) FR2991956B1 (en)
PL (1) PL2676859T3 (en)
RU (1) RU2607141C2 (en)

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PL2676859T3 (en) 2016-02-29
US9096240B2 (en) 2015-08-04
CA2819064C (en) 2020-07-14
FR2991956B1 (en) 2014-07-04
CN103507822B (en) 2017-05-24
FR2991956A1 (en) 2013-12-20
ES2552006T3 (en) 2015-11-25
RU2607141C2 (en) 2017-01-10
CA2819064A1 (en) 2013-12-18
US20130333590A1 (en) 2013-12-19
CN103507822A (en) 2014-01-15
EP2676859A1 (en) 2013-12-25
RU2012145431A (en) 2014-04-27

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