EP0501856B1 - Braking system for a railway traction unit - Google Patents

Braking system for a railway traction unit Download PDF

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Publication number
EP0501856B1
EP0501856B1 EP19920400453 EP92400453A EP0501856B1 EP 0501856 B1 EP0501856 B1 EP 0501856B1 EP 19920400453 EP19920400453 EP 19920400453 EP 92400453 A EP92400453 A EP 92400453A EP 0501856 B1 EP0501856 B1 EP 0501856B1
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EP
European Patent Office
Prior art keywords
axle
frame
suspension
relation
intermediate support
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EP19920400453
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German (de)
French (fr)
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EP0501856A1 (en
Inventor
Jean Michel Ven
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Arbel Fauvet Rail SA
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Arbel Fauvet Rail SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
    • B61H13/00—Actuating rail vehicle brakes
    • B61H13/34—Details
    • B61H13/38—Suspension of transmitting mechanisms

Definitions

  • the invention relates to a braking device of an axle of a railway vehicle such as a wagon whose chassis of the platform directly carries the suspension means of the axle in question or a bogie wagon in which the suspension means of the corresponding axle are then carried by the bogie chassis.
  • the braking device consists of a rotor linked in rotation with the axle and in a mechanism immobilized in rotation relative to the axle and, for this purpose, connected to the chassis which carries the suspension of this axle.
  • the mechanism comprises facing two opposite zones of the rotor of the jaws provided with brake linings and carried by levers articulated around at least one axis of a support member and reciprocally actuated by at least one jack.
  • a braking device is provided at each of the two ends of the axle.
  • the rotor is formed on the flanges of the wheel (FR-A-2.215.555) or consists of a disc separately wedged on the axle.
  • the invention is similar to a device of this second type.
  • the lines consist of substantially vertical rods with the foot and the head crossed by horizontal axes and parallel to the longitudinal axis of the railway vehicle.
  • the feet and heads of these rods can be mounted on their axis by means tolerating very little movement of the ball joint.
  • the position of the jaws relative to the rotor can first of all vary in height as a function of the load on the chassis but also longitudinally as a function of the play tolerated in this direction.
  • One of the results which the invention aims to obtain is a braking device which, although without direct connection of the jaws to the axle by a guide in rotation, ensures a relatively constant longitudinal position of the jaws relative to the rotor.
  • Another result that the invention aims to obtain is such a device which, compared to known devices, allows the use of jaws with a larger surface area, therefore less rapid wear and requiring less pressure per unit area.
  • Another result which the invention aims to obtain is a braking device which is compatible with suspensions with orientable axles.
  • chassis 1 such as that of a wagon or a bogie, to which chassis 1 is associated a suspension 2 of an axle 3.
  • Each axle carries two axle boxes 4 provided with ears 5 on each of which the base of at least one spring 6 bears, the head of which is capped by a cap 7.
  • connection between the chassis 1 and the caps 7 is ensured by two pairs of connecting rods 8 articulated around axes transverse to the vehicle so that the box 4 has, in a longitudinal direction, a freedom of movement limited for example to the stroke of pushers 9 interposed between the caps and the front and rear faces of the box 4.
  • Each braking device 10 comprises a rotor 11 linked in rotation to the axle 3 and a mechanism 12 immobilized in rotation relative to the axle 3 and, for this purpose, connected to the chassis 1 which carries the suspension of the axle in question .
  • the mechanism 12 comprises, facing two opposite zones of the rotor 11, two jaws 13 provided with brake linings 14 and carried by levers 15, 16 articulated around at least one axis 17 carried by a support member 18.
  • levers 15, 16 are reciprocally actuated by at least one jack 19.
  • such a braking device 10 is inserted at each end of the axle 3.
  • the rotor 11 is formed on the flange of the wheel or consists of a disc wedged separately in rotation on the said axle.
  • the jaws are not directly connected to the axle by a guide in rotation but in known manner the mechanism is relatively positioned with respect to the axle by lines 20 for connection to the chassis 1, which lines consist of substantially vertical rods 21 whose feet and head are crossed by axes 22, 23 horizontal and parallel to the longitudinal axis of the railway vehicle in order to allow a transverse movement of the mechanism relative to the rotor so as to compensate for the movement tolerated by games axial of the axle with respect to the chassis.
  • the rotor 11 is a disk and the jaws 13 act on two zones 24 of the opposite radial faces of this disk, which faces each have for this purpose an active zone 24 in the form of a crown limited to the outside by the peripheral edge. 25 of the disc and inside by the external face 26 of the axle.
  • the jaws 13 cover only a fraction of this active area 24 and have a periphery, substantially bean-shaped, shaped so that they never extend beyond the outer 25 and inner 26 limits of the active area of the rotor and this despite the deflections of the chassis 1 carrying the mechanism 12 relative to the axle 3 carrying the rotor 11, deflection tolerated by the suspension.
  • the part 5 fixed relative to the axle box 4 is constituted by the ear 5 for supporting the base of one of the suspension springs.
  • the intermediate support 28 is provided with a projection 39 towards the ground to a level at least sufficient to bring the hinge pin 38 of the pull rod 36 to a suitable height.
  • the mechanism benefits from an indirect axle connection, that is to say via the axle box, the traction rod 36 and the support 28 which allows the mechanism to fairly faithfully follow the longitudinal deflections of the axle relative to the chassis.
  • the support member 18 is also associated with the intermediate support 28 and this by an articulation 33 of transverse axis to the chassis of the wagon.
  • the articulation of the support member is merged with one of the articulations of the rods and the articulations of the rods 29, 30 allow a slight play of ball joint.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Braking Arrangements (AREA)

Description

L'invention se rapporte à un dispositif de freinage d'un essieu d'engin ferroviaire tel un wagon dont le chassis de la plateforme porte directement les moyens de suspension de l'essieu considéré ou un wagon à boggies dans lesquels les moyens de suspension de l'essieu correspondant sont alors portés par le chassis du boggie.The invention relates to a braking device of an axle of a railway vehicle such as a wagon whose chassis of the platform directly carries the suspension means of the axle in question or a bogie wagon in which the suspension means of the corresponding axle are then carried by the bogie chassis.

Dans les deux cas, le dispositif de freinage consiste en un rotor lié en rotation avec l'essieu et en un mécanisme immobilisé en rotation par rapport à l'essieu et, à cet effet, relié au chassis qui porte la suspension de cet essieu.In both cases, the braking device consists of a rotor linked in rotation with the axle and in a mechanism immobilized in rotation relative to the axle and, for this purpose, connected to the chassis which carries the suspension of this axle.

Le mécanisme comprend face à deux zones opposées du rotor des machoires pourvues de garnitures de frein et portées par des leviers articulés autour d'au moins un axe d'un organe d'appui et actionnés réciproquement par au moins un vérin.The mechanism comprises facing two opposite zones of the rotor of the jaws provided with brake linings and carried by levers articulated around at least one axis of a support member and reciprocally actuated by at least one jack.

Généralement, un dispositif de freinage est prévu à chacune des deux extrémités de l'essieu.Generally, a braking device is provided at each of the two ends of the axle.

Le rotor est constitué sur les flasques de la roue (FR-A-2.215.555) ou consiste en un disque séparément calé sur l'essieu.The rotor is formed on the flanges of the wheel (FR-A-2.215.555) or consists of a disc separately wedged on the axle.

Parmi les dispositifs de freinage, on distingue deux types de machoires :

  • celles rigoureusement positionnées par rapport à l'essieu auquel elles sont alors directement reliées par un guidage en rotation (FR-A-2.626.541), ce qui complique les montages/démontages et majore fortement le prix de revient, et
  • celles ne bénéficiant pas d'un tel guidage et qui pour leur relatif positionnement par rapport à l'essieu ont leur mécanisme qui est relié au chassis par des suspentes. (DE-OS-2629445)
Among the braking devices, there are two types of jaws:
  • those rigorously positioned with respect to the axle to which they are then directly connected by a rotating guide (FR-A-2.626.541), which complicates assembly / disassembly and greatly increases the cost price, and
  • those not benefiting from such guidance and which for their relative positioning relative to the axle have their mechanism which is connected to the chassis by lines. (DE-OS-2629445)

L'invention s'apparente à un dispositif de ce deuxième type.The invention is similar to a device of this second type.

Généralement, afin d'autoriser des débattements transversaux du mécanisme par rapport au rotor, de manière à tenir compte des jeux transversaux de l'essieu par rapport au chassis, les suspentes sont constituées par des biellettes sensiblement verticales dont le pied et la tête sont traversés par des axes horizontaux et parallèles à l'axe longitudinal de l'engin ferroviaire.Generally, in order to allow transverse deflections of the mechanism with respect to the rotor, so as to take account of the transverse clearances of the axle with respect to the chassis, the lines consist of substantially vertical rods with the foot and the head crossed by horizontal axes and parallel to the longitudinal axis of the railway vehicle.

Afin d'également tenir compte des possibles défauts de parallélisme entre ces axes, les pieds et têtes de ces biellettes peuvent être montés sur leur axe par un moyen tolérant un trés faible mouvement de rotule.In order also to take account of possible parallelism faults between these axes, the feet and heads of these rods can be mounted on their axis by means tolerating very little movement of the ball joint.

Compte tenu de la souplesse de la suspension, la position des machoires par rapport au rotor peut varier tout d'abord en hauteur en fonction de la charge du chassis mais aussi longitudinalement en fonction des jeux tolérés dans cette direction.Given the flexibility of the suspension, the position of the jaws relative to the rotor can first of all vary in height as a function of the load on the chassis but also longitudinally as a function of the play tolerated in this direction.

Si avec une suspension classique, ces jeux longitudinaux sont suffisamment faibles pour être tolérables par le dispositif de freinage, par contre, avec une suspension pour véhicule ou boggie à essieux orientables (FR-A-2.648.417), ces jeux longitudinaux sont importants et ont toujours constitué un obstacle au montage d'un tel dispositif de freinage.If with a conventional suspension, these longitudinal clearances are small enough to be tolerable by the braking device, on the other hand, with a suspension for a vehicle or bogie with steerable axles (FR-A-2.648.417), these longitudinal clearances are important and have always been an obstacle to the mounting of such a braking device.

Or, trés fréquemment, les réglementations obligent que, quelle que soit leur suspension, les essieux soient freinés.However, very frequently, regulations require that, whatever their suspension, the axles are braked.

De plus, si pour une suspension classique, ces jeux sont tolérables, ils obligent néanmoins à réserver ce jeu sur le pourtour des garnitures des machoires et donc à en réduire la surface d'où une usure plus rapide de ces garnitures et une nécessaire augmentation de la pression par unité de surface pour parvenir à la même puissance de freinage.In addition, if for a traditional suspension, these clearances are tolerable, they nevertheless oblige to reserve this clearance around the edges of the jaw linings and therefore to reduce the surface resulting in faster wear of these linings and a necessary increase in pressure per unit area to achieve the same braking power.

Un des résultats que l'invention vise à obtenir est un dispositif de freinage qui, bien que sans liaison directe des machoires à l'essieu par un guidage en rotation assure une position longitudinale relativement constante des machoires par rapport au rotor.One of the results which the invention aims to obtain is a braking device which, although without direct connection of the jaws to the axle by a guide in rotation, ensures a relatively constant longitudinal position of the jaws relative to the rotor.

Un autre résultat que l'invention vise à obtenir est un tel dispositif qui, par rapport aux dispositifs connus, permette d'utiliser des machoires de plus grande surface donc d'usure moins rapide et nécessitant une pression par unité de surface moins importante.Another result that the invention aims to obtain is such a device which, compared to known devices, allows the use of jaws with a larger surface area, therefore less rapid wear and requiring less pressure per unit area.

Un autre résultat que l'invention vise à obtenir est un dispositif de freinage qui soit compatible avec les suspensions à essieux orientables.Another result which the invention aims to obtain is a braking device which is compatible with suspensions with orientable axles.

A cet effet, elle a pour objet un dispositif de freinage du type précité notamment caractérisé en ce qu'afin que, malgré l'absence de liaison directe des machoires à l'essieu par un guidage en rotation, une position longitudinale relativement constante des machoires par rapport au rotor soit néanmoins assurée, au lieu que le mécanisme soit simplement directement relié au chassis par des suspentes :

  • d'une part, le dit mécanisme est par ses suspentes relié à un support intermédiaire, lui-même relié au dit chassis par des biellettes de suspension qui, en position moyenne correspondant à la situation précitée, sont sensiblement verticales et réalisent avec le chassis et le support intermédiaire un parallélogramme, déformable dans un plan vertical parallèle à l'axe longitudinal de l'engin ferroviaire, grâce à leurs articulations autour d'axes horizontaux et parallèles à l'axe transversal du véhicule et,
  • d'autre part, afin que le support suive relativement les débattements longitudinaux de l'essieu par rapport au chassis, le support intermédiaire est relié à une pièce, fixe par rapport à la boîte d'essieu, par une biellette de traction qui, en cas de charge moyenne du chassis, est sensiblement horizontale et s'articule sur le support intermédiaire et sur la pièce fixe par rapport à la boîte d'essieu autour d'axes horizontaux parallèles à l'axe transversal du véhicule par une liaison tolérant un certain mouvement de rotule afin de tenir compte des effets des jeux transversaux entre l'essieu et le chassis.
To this end, it relates to a braking device of the aforementioned type in particular characterized in that so that, despite the absence of direct connection of the jaws to the axle by a guide in rotation, a relatively constant longitudinal position of the jaws relative to the rotor is nevertheless ensured, instead of the mechanism being simply directly connected to the chassis by lines:
  • on the one hand, the said mechanism is by its lines connected to an intermediate support, itself connected to the said frame by suspension rods which, in the middle position corresponding to the aforementioned situation, are substantially vertical and are produced with the frame and the intermediate support a parallelogram, deformable in a vertical plane parallel to the longitudinal axis of the railway vehicle, by virtue of their articulations around horizontal axes and parallel to the transverse axis of the vehicle and,
  • on the other hand, so that the support follows relatively the longitudinal deflections of the axle relative to the chassis, the intermediate support is connected to a part, fixed relative to the axle box, by a traction rod which, in case of average chassis load, is substantially horizontal and is articulated on the intermediate support and on the fixed part by compared to the axle box around horizontal axes parallel to the transverse axis of the vehicle by a link tolerating a certain ball joint movement in order to take account of the effects of transverse play between the axle and the chassis.

Elle sera bien comprise à l'aide de la description ci-aprés faite à titre d'exemple non limitatif en regard du dessin ci-annexé qui représente schématiquement :

  • figure 1 : un exemple de suspension utilisée avec le dispositif de freinage,
  • figures 2 à 4 : vues de profil du dispositif de freinage lorsque la suspension est soumise à différentes contraintes.
It will be clearly understood with the aid of the description below given by way of nonlimiting example with regard to the attached drawing which schematically represents:
  • Figure 1: an example of suspension used with the braking device,
  • Figures 2 to 4: side views of the braking device when the suspension is subjected to different stresses.

En se reportant au dessin, on voit un chassis 1, tel celui d'un wagon ou d'un boggie, auquel chassis 1 est associé une suspension 2 d'un essieu 3.Referring to the drawing, we see a chassis 1, such as that of a wagon or a bogie, to which chassis 1 is associated a suspension 2 of an axle 3.

Chaque essieu porte deux boites d'essieu 4 pourvues d'oreilles 5 sur chacune desquelles prend appui la base d'au moins un ressort 6 dont la tête est coiffée par un chapeau 7.Each axle carries two axle boxes 4 provided with ears 5 on each of which the base of at least one spring 6 bears, the head of which is capped by a cap 7.

La liaison entre le chassis 1 et les chapeaux 7 est assurée par deux paires de biellettes de liaison 8 articulées autour d'axes transversaux au véhicule de sorte que la boite 4 présente, dans une direction longitudinale, une liberté de déplacement limitée par exemple à la course de poussoirs 9 intercalés entre les chapeaux et les faces avant et arrière de la boite 4.The connection between the chassis 1 and the caps 7 is ensured by two pairs of connecting rods 8 articulated around axes transverse to the vehicle so that the box 4 has, in a longitudinal direction, a freedom of movement limited for example to the stroke of pushers 9 interposed between the caps and the front and rear faces of the box 4.

Chaque dispositif de freinage 10 comprend un rotor 11 lié en rotation à l'essieu 3 et un mécanisme 12 immobilisé en rotation par rapport à l'essieu 3 et, à cet effet, relié au chassis 1 qui porte la suspension de l'essieu considéré.Each braking device 10 comprises a rotor 11 linked in rotation to the axle 3 and a mechanism 12 immobilized in rotation relative to the axle 3 and, for this purpose, connected to the chassis 1 which carries the suspension of the axle in question .

Le mécanisme 12 comprend face à deux zones opposées du rotor 11 deux machoires 13 pourvues de garnitures de frein 14 et portées par des leviers 15, 16 articulés autour d'au moins un axe 17 porté par un organe d'appui 18.The mechanism 12 comprises, facing two opposite zones of the rotor 11, two jaws 13 provided with brake linings 14 and carried by levers 15, 16 articulated around at least one axis 17 carried by a support member 18.

Ces leviers 15, 16 sont actionnés réciproquement par au moins un vérin 19.These levers 15, 16 are reciprocally actuated by at least one jack 19.

Généralement, un tel dispositif de freinage 10 est intercalé à chaque extrémité de l'essieu 3.Generally, such a braking device 10 is inserted at each end of the axle 3.

Le rotor 11 est constitué sur le flasque de la roue ou consiste en un disque calé séparément en rotation sur le dit essieu.The rotor 11 is formed on the flange of the wheel or consists of a disc wedged separately in rotation on the said axle.

Les machoires ne sont pas directement reliées à l'essieu par un guidage en rotation mais de manière connue le mécanisme est relativement positionné par rapport à l'essieu par des suspentes 20 de liaison au chassis 1, lesquelles suspentes consistent en des biellettes sensiblement verticales 21 dont le pied et la tête sont traversés par des axes 22, 23 horizontaux et parallèles à l'axe longitudinal de l'engin ferroviaire afin d'autoriser un débattement transversal du mécanisme par rapport au rotor de manière à compenser le déplacement toléré par les jeux axiaux de l'essieu par rapport au chassis.The jaws are not directly connected to the axle by a guide in rotation but in known manner the mechanism is relatively positioned with respect to the axle by lines 20 for connection to the chassis 1, which lines consist of substantially vertical rods 21 whose feet and head are crossed by axes 22, 23 horizontal and parallel to the longitudinal axis of the railway vehicle in order to allow a transverse movement of the mechanism relative to the rotor so as to compensate for the movement tolerated by games axial of the axle with respect to the chassis.

De préférence, le rotor 11 est un disque et les machoires 13 agissent sur deux zones 24 des faces radiales opposées de ce disque, lesquelles faces présentent à cet effet chacune une zone active 24 en forme de couronne limitée à l'extérieur par le bord périphérique 25 du disque et à l'intérieur par la face externe 26 de l'essieu.Preferably, the rotor 11 is a disk and the jaws 13 act on two zones 24 of the opposite radial faces of this disk, which faces each have for this purpose an active zone 24 in the form of a crown limited to the outside by the peripheral edge. 25 of the disc and inside by the external face 26 of the axle.

Les machoires 13 ne recouvrent quant à elles qu'une fraction de cette zone active 24 et ont un pourtour, sensiblement en forme de haricot, profilé de manière telle qu'elles ne débordent jamais des limites extérieures 25 et intérieures 26 de la zone active du rotor et ce malgré les débattements du chassis 1 portant le mécanisme 12 par rapport à l'essieu 3 portant le rotor 11, débattement que tolère la suspension.The jaws 13 cover only a fraction of this active area 24 and have a periphery, substantially bean-shaped, shaped so that they never extend beyond the outer 25 and inner 26 limits of the active area of the rotor and this despite the deflections of the chassis 1 carrying the mechanism 12 relative to the axle 3 carrying the rotor 11, deflection tolerated by the suspension.

Elles ont de ce fait également une surface limitée de laquelle dépendent la pression par unité de surface à exercer pour obtenir l'action de freinage et donc la rapidité de l'usure de ces garnitures 14.They therefore also have a limited surface area on which depend the pressure per unit area to be exerted to obtain the braking action and therefore the speed of wear of these linings 14.

C'est ce qui à ce jour interdit le montage de tels dispositifs de freinage à relatif guidage des machoires par rapport à l'essieu au moyen de suspentes de liaison au chassis sur un engin à essieu orientable dont les débattements longitudinaux par rapport au chassis atteignent généralement au droit du rotor une valeur de l'ordre de plus ou moins vingt cinq millimètres par rapport à une position moyenne, correspondant à un chassis à l'arrêt et à un essieu perpendiculaire à l'axe longitudinal.This is what to date prohibits the mounting of such braking devices with relative guiding of the jaws relative to the axle by means of suspension links to the chassis on a machine with a steerable axle whose longitudinal deflections with respect to the chassis reach generally to the right of the rotor a value of the order of plus or minus twenty five millimeters from an average position, corresponding to a stationary chassis and an axle perpendicular to the longitudinal axis.

En effet, cette valeur obligerait à réduire quasiment à néant la surface active des garnitures.In fact, this value would mean that the active surface of the fittings should be reduced to practically nothing.

Afin que, malgré l'absence de liaison directe des machoires 13 à l'essieu par un guidage en rotation, une position longitudinale relativement constante des machoires par rapport au rotor soit néanmoins assurée, au lieu que le mécanisme 12 soit simplement directement relié au chassis par des suspentes 20 :

  • d'une part, le dit mécanisme 12 est par ses suspentes 20 relié à un support intermédiaire 28, lui-même relié au dit chassis 1 par des biellettes de suspension 29, 30 qui, en position moyenne correspondant à la situation précitée, sont sensiblement verticales et réalisent avec le chassis 1 et le support intermédiaire 28 un parallélogramme 31, déformable dans un plan vertical parallèle à l'axe longitudinal de l'engin ferroviaire, grâce à leurs articulations 32 à 35 autour d'axes horizontaux et parallèles à l'axe transversal du véhicule et,
  • d'autre part, afin que le support suive relativement les débattements longitudinaux de l'essieu 3 par rapport au chassis, le support intermédiaire 28 est relié à une pièce 5, fixe par rapport à la boîte d'essieu 4, par une biellette de traction 36 oui, en cas de charge moyenne du chassis, est sensiblement horizontale et s'articule sur le support intermédiaire et sur la pièce fixe 5 par rapport à la boîte d'essieu 4 autour d'axes 37, 38 horizontaux parallèles à l'axe transversal du véhicule par une liaison tolérant un certain mouvement de rotule afin de tenir compte des effets des jeux transversaux entre l'essieu 3 et le chassis 1.
So that, despite the absence of direct connection of the jaws 13 to the axle by a rotary guide, a relatively constant longitudinal position of the jaws relative to the rotor is nevertheless ensured, instead of the mechanism 12 being simply directly connected to the chassis by lines 20:
  • on the one hand, said mechanism 12 is by its lines 20 connected to an intermediate support 28, itself connected to said frame 1 by suspension links 29, 30 which, in the middle position corresponding to the aforementioned situation, are substantially vertical and realize with the chassis 1 and the intermediate support 28 a parallelogram 31, deformable in a vertical plane parallel to the longitudinal axis of the railway vehicle, thanks to their articulations 32 to 35 around horizontal axes and parallel to the transverse axis of the vehicle and,
  • on the other hand, so that the support relatively follows the longitudinal deflections of the axle 3 relative to the chassis, the intermediate support 28 is connected to a part 5, fixed relative to the axle box 4, by a connecting rod traction 36 yes, in the case of an average chassis load, is substantially horizontal and is articulated on the intermediate support and on the fixed part 5 relative to the axle box 4 around axes 37, 38 horizontal parallel to the transverse axis of the vehicle by a link tolerating a certain ball joint movement in order to take account of the effects of transverse play between the axle 3 and the chassis 1.

Avantageusement, la pièce 5 fixe par rapport à la boîte d'essieu 4 est constituée par l'oreille 5 d'appui de la base de l'un des ressorts de suspension.Advantageously, the part 5 fixed relative to the axle box 4 is constituted by the ear 5 for supporting the base of one of the suspension springs.

Au moins dans ce cas, le support intermédiaire 28 est pourvu d'une projection 39 vers le sol jusqu'à un niveau au moins suffisant pour porter l'axe d'articulation 38 de la biellette de traction 36 à hauteur convenable.At least in this case, the intermediate support 28 is provided with a projection 39 towards the ground to a level at least sufficient to bring the hinge pin 38 of the pull rod 36 to a suitable height.

On comprend que sans être directement relié à l'essieu par un moyen de guidage en rotation spécifique, le mécanisme bénéficie d'une liaison à l'essieu indirecte c'est à dire via la boîte d'essieu, la biellette de traction 36 et le support 28 ce qui permet au mécanisme de suivre assez fidèlement les débattements longitudinaux de l'essieu par rapport au chassis.It is understood that without being directly connected to the axle by a specific guiding means in rotation, the mechanism benefits from an indirect axle connection, that is to say via the axle box, the traction rod 36 and the support 28 which allows the mechanism to fairly faithfully follow the longitudinal deflections of the axle relative to the chassis.

Les erreurs dues, les unes, à la différence des débattements de la boîte et du rotor et les autres aux flèches des arcs d'oscillation de la biellette de traction autour de sa position moyenne sont en effet minimes et n'affectent donc pas sensiblement la surface des garnitures.The errors due, some, unlike the deflections of the gearbox and the rotor and others to the arrows of the oscillation arcs of the pull rod around its average position are indeed minimal and therefore do not significantly affect the trim surface.

Avec de telles dispositions, il est possible de remplacer les garnitures qui, auparavant, auraient eu une surface maximale de 24.000 mm² pour tenir compte des débattements de l'essieu par des garnitures d'environ 3.900 mm² soit un gain de l'ordre de 60 %.With such arrangements, it is possible to replace the linings which previously would have had a maximum surface of 24,000 mm² to take account of the axle deflections with linings of approximately 3,900 mm², ie a gain of around 60 %.

Entre les supports 20 qui associent le support intermédiaire 28 au mécanisme 12, l'organe d'appui 18 est associé également au support intermédiaire 28 et ceci par une articulation 33 d'axe transversal au chassis du wagon.Between the supports 20 which associate the intermediate support 28 with the mechanism 12, the support member 18 is also associated with the intermediate support 28 and this by an articulation 33 of transverse axis to the chassis of the wagon.

De préférence, l'articulation de l'organe d'appui est confondue avec l'une des articulations des biellettes et les articulations des biellettes 29, 30 permettent un léger jeu de rotule.Preferably, the articulation of the support member is merged with one of the articulations of the rods and the articulations of the rods 29, 30 allow a slight play of ball joint.

Claims (6)

  1. A braking system for an axle of a railway vehicle, such as a wagon in which the platform frame directly carries the suspension means for the axle in question, or a bogie wagon in which the suspension means for the corresponding axle are carried by the bogie frame,
       in which vehicle each axle carries two axle boxes (4) on which the suspension is supported,
       which system comprises a rotor (11) connected to the axle (3) for rotation, and a mechanism (12) rotationally immobilised compared to the axle (3) and, for this purpose, connected to the frame (1) which carries the suspension for the axle in question, and the mechanism (12) comprises, facing two opposing regions of the rotor (11), two brake shoes (13) provided with brake linings (14) and carried by levers (15, 16) articulated about at least one spindle (17) carried by a supporting member (18), the levers (15, 16) of which are reciprocally operated by at least one jack (19),
       which brake shoes are not directly connected to the axle by a rotating guide, but the mechanism is relatively positioned, in a known manner, in relation to the axle by suspenders (20) for connection to the frame (1), which suspenders comprise substantially vertical connecting rods (21), the head and the foot of which are traversed by horizontal spindles (22, 23) parallel to the longitudinal axis of the railway vehicle in order to allow transverse movement of the mechanism in relation to the rotor so as to compensate for the displacement permitted by the end play of the axle in relation to the frame,
       this system being characterised in that, in order to ensure a relatively constant longitudinal position of the brake shoes in relation to the rotor, in spite of the absence of a direct connection between the brake shoes (13) and the axle by means of a rotating guide, instead of the mechanism (12) simply being connected directly to the frame by suspenders (20):
    - firstly, the said mechanism (12) is connected by its suspenders (20) to an intermediate support (28), itself connected to the said frame (1) by suspension rods (29, 30) which, in a mean position corresponding to the aforesaid situation, are substantially vertical and form, with the frame (1) and the intermediate support (28), a parallelogram (31) deformable in a vertical plane parallel to the longitudinal axis of the railway vehicle owing to their means of articulation (32 to 35) about horizontal spindles parallel to the transverse axis of the vehicle, and,
    - secondly, to ensure that the support relatively follows the longitudinal movements of the axle (3) in relation to the frame, the intermediate support (28) is connected by a traction rod (36) to a part (5), which is fixed in relation to the axle box (4), which traction rod (36), in the case of average loading of the frame, is substantially horizontal and is articulated on the intermediate support and on the part (5), which is fixed in relation to the axle box (4), about horizontal spindles (37, 38) parallel to the transverse axis of the vehicle by a joint tolerating a certain swivelling movement in order to allow for the effects of the transverse play between the axle (3) and the frame (1).
  2. A system according to claim 1, characterised in that the intermediate support (28) is provided with a projection (39) towards the ground to a level at least sufficient to carry the articulation spindle (38) of the traction rod (36) at a suitable height.
  3. A system according to claim 1 or 2, characterised in that the means of articulation of the connecting rods (29, 30) allow slight swivelling play.
  4. A system according to any one of claims 1 to 3, characterised in that the supporting member (18) is also connected to the intermediate support (28) by a means of articulation (33), the axis of which extends transversely to the frame of the wagon.
  5. A system according to any one of claims 1 to 4, characterised in that the means of articulation of the supporting member coincides with one of the means of articulation of the connecting rods.
  6. A system according to any one of claims 1 to 5, wherein the axle box is provided with flanges (5), on each of which is supported the suspension, characterised in that the part (5), which is fixed in relation to the axle box (4), is formed by the flange (5) for supporting the base of one of the suspension springs.
EP19920400453 1991-03-01 1992-02-20 Braking system for a railway traction unit Expired - Lifetime EP0501856B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9102683 1991-03-01
FR9102683A FR2673414B1 (en) 1991-03-01 1991-03-01 BRAKING DEVICE OF A RAILWAY AXLE.

Publications (2)

Publication Number Publication Date
EP0501856A1 EP0501856A1 (en) 1992-09-02
EP0501856B1 true EP0501856B1 (en) 1994-07-20

Family

ID=9410404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920400453 Expired - Lifetime EP0501856B1 (en) 1991-03-01 1992-02-20 Braking system for a railway traction unit

Country Status (4)

Country Link
EP (1) EP0501856B1 (en)
DE (1) DE69200244T2 (en)
FI (1) FI920922A (en)
FR (1) FR2673414B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19522384A1 (en) * 1995-06-23 1997-01-02 Knorr Bremse Systeme Suspension device for brake units of rail vehicles
DE19746443A1 (en) * 1997-10-21 1999-04-22 Knorr Bremse Systeme Brake block support assembly for disc brakes of rail vehicles
DE10135796C1 (en) * 2001-07-23 2003-01-23 Knorr Bremse Systeme Brake shoe support device for rail vehicles has suspended bracket with guide arm parallel to longitudinal bracket axis and acting as fork guide

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE332724A (en) * 1925-09-09
US2228818A (en) * 1938-03-28 1941-01-14 Budd Wheel Co Brake construction
DE2609445C3 (en) * 1976-03-06 1979-04-12 Knorr-Bremse Gmbh, 8000 Muenchen Disc brake device for rail vehicles
FR2648193B1 (en) * 1989-06-07 1994-05-13 Sab Nife METHOD FOR REGULATING A PRESSURE IN A WORKING CIRCUIT FROM A REFERENCE PRESSURE, DEVICE FOR CARRYING OUT SAID METHOD, BRAKING SYSTEM AND EFFORT LIMITING SYSTEM COMPRISING THIS DEVICE

Also Published As

Publication number Publication date
DE69200244T2 (en) 1994-10-27
FI920922A0 (en) 1992-02-28
DE69200244D1 (en) 1994-08-25
FR2673414B1 (en) 1993-06-11
FI920922A (en) 1992-09-02
EP0501856A1 (en) 1992-09-02
FR2673414A1 (en) 1992-09-04

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