EP1277640A1 - Axle-box for railway vehicles - Google Patents

Axle-box for railway vehicles Download PDF

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Publication number
EP1277640A1
EP1277640A1 EP01490027A EP01490027A EP1277640A1 EP 1277640 A1 EP1277640 A1 EP 1277640A1 EP 01490027 A EP01490027 A EP 01490027A EP 01490027 A EP01490027 A EP 01490027A EP 1277640 A1 EP1277640 A1 EP 1277640A1
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EP
European Patent Office
Prior art keywords
support
axle
axle box
section
face
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.)
Withdrawn
Application number
EP01490027A
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German (de)
French (fr)
Inventor
Jean-Michel Robert Ven
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Arbel Fauvet Rail SA
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Arbel Fauvet Rail SA
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Filing date
Publication date
Application filed by Arbel Fauvet Rail SA filed Critical Arbel Fauvet Rail SA
Priority to EP01490027A priority Critical patent/EP1277640A1/en
Publication of EP1277640A1 publication Critical patent/EP1277640A1/en
Withdrawn legal-status Critical Current

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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
    • B61F15/12—Axle-boxes with roller, needle, or ball bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
    • B61K9/06—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault by detecting or indicating heat radiation from overheated axles

Definitions

  • the invention relates to an axle box for a railway vehicle.
  • This support is also called a pallet.
  • Known supports are in the form of a section substantially in I, that is to say comprising a vertical core connecting a plate lower and an upper plate, which upper plate constitutes generally the lower wall of the body housing the guide means in axle rotation.
  • the width of the lower plate is narrower than that of the plate higher.
  • the support can also be in a box.
  • This structure gives good rigidity for a minimum weight.
  • two sails connect each of the two faces lateral and vertical of the aforementioned body with the table concerned, the internal faces of these two sails forming a vertical guide corridor for the movement of the axle box in relation to the chassis.
  • These sails include a vertical part fixed on the lateral face of the axle box body and table connection part, end of this connection part located substantially in the middle of the length of the support table.
  • the body of the axle box housing the means of guide also contains a lubricant.
  • this temperature may reach a critical value causing destruction of the rotating guide means, except to stop the vehicle.
  • the rail network is equipped along the tracks of fixed means for detecting the temperature of the axle boxes and transmission of the detected information, these fixed detection means being called DBC (French) or HBD (English).
  • These means are arranged along the rails and emit a beam in direction of the axle box to then capture the incident beam and make it analysis to, at least in the event of an incident, transmit the information to train driver to stop the train.
  • the beam was emitted from the ground from a position located laterally to the rails and at an angle of 68 ° to tap at an angle under the upper plate of the support carrying the body box.
  • the upper plate is at a temperature close to that of the means guide with a correction factor, it is not the same for the stage lower which is globally at a temperature four times lower.
  • This temperature of the bottom plate does not, however, reflect exact of that of the axle box, that is to say there is not a proportionality between the actual temperature and the temperature at the measuring point because of many factors come into play and a mathematical model cannot be really possible.
  • the beam emission angle is now set at 90 ° to the ground.
  • the position of the detection means is determined according to bogies provided at standard spacing and therefore the detection means is localized so that the beam hits under the upper plate avoiding however the lower plate this being narrower (see Figure 1).
  • This fixed detection means is therefore determined for a spacing in France between the rails, one thousand four hundred and thirty five millimeters and between the axle stub of two thousand millimeters or two thousand eighty millimeters.
  • the spacing values are respectively one thousand five hundred and twenty millimeters and two thousand thirty six millimeters and for the one thousand six hundred and eighty eight millimeters and two thousand spanish gauge one hundred and seventy millimeters or two thousand two hundred and thirty five millimeters.
  • axles for vehicles capable of accommodating two different rail spacings (for example France / Spain), we change the axles so that the spacing between the wheels conforms to the spacing of the network considered; the axle boxes remain discarded by the highest value center-to-center between bearings and therefore in an area such as the vertical beam new detection means tap on the lower plate.
  • the temperature of the lower plate is not proportional to the temperature of the box axle, the detection system cannot therefore fulfill its function.
  • the invention therefore proposes to remedy this drawback in particular.
  • an axle box 1 consisting of a body 2 housing a means for guiding the end of an axle in rotation and, the base of this body, of a support 3 extending on either side of the aforementioned body to form two support tables 4 for suspension springs (not shown).
  • rotating guide means do not are not shown.
  • the springs are therefore supported on the upper face 5 of each of the tables 4 and indirectly on the chassis, for example via caps connected to the chassis by oblique rings.
  • Tables 4 are therefore cantilevered with respect to the axle or the body of the axle box.
  • This support obviously has mechanical strength predetermined to support the static and dynamic loads induced especially when moving the vehicle with which the gearbox is associated axle.
  • the support 3 is a part homogeneous contained in an envelope 6 of generally triangular section rectangle.
  • the envelope has been shown in phantom.
  • the thermal propagation from the face superior in contact or at least indirectly in contact with the lubricant contained in the axle box is made according to a proportionality rule known linear which mainly depends on the thermal conductivity of the material and the thickness of said material.
  • the external faces of the support will therefore be smooth and devoid of roughness consequent, of ribs or grooves, having the effect of acting as a radiator.
  • the vertical face of the support facing the axle could, possibly be provided with grooves or ribs provided that the influence of this rib or groove is not perceptible in the part of the medium used.
  • the groove should therefore not be deep.
  • One 7 of the sides of the right angle triangular section forms the face horizontal and upper support; the vertical face 8, therefore orthogonal to this horizontal face 7, is turned inward, that is to say towards the center of the axle.
  • the incident and then reflected beam therefore hits the underside constituting the hypotenuse of the triangle.
  • the contact point can be more or less distant from the vertical face depending on the position of the axle box but this point being known and, in the measure that there is a good homogeneity and that the propagation rule thermal in this homogeneous body is known as well as the position of the beam incident, it is quite easy to extrapolate the temperature of the lubricant.
  • the part 100 or useful area in which the measurement is made extends substantially over two-thirds of the width of the support from its end thinned.
  • the convective envelope will be minimal for a mechanical resistance of the support identical to that of an I-section.
  • the lower face 9 of the support that is to say the inclined one, is substantially plane. It forms with an horizontal plane an angle of the order of 23 °.
  • each of the tables 4 is rounded so as to minimize the influence of air cooling and therefore of heat loss by dissipation.
  • the section of the support is not exactly triangular rectangle.
  • axle box is provided on these two sides 10 lateral means 11 for guiding the vertical translation of the box.
  • Each guide means is constituted at least indirectly by the flat side face 10A of the body of the box and two sails 12 located in coplanar planes to the axle section.
  • the height H of each sail is limited so that this veil is essentially fixed only on the flat face 10A side of the axle box, which face 10A lateral has its edge 10B lower which is connected over its entire width to the support table by a wide curve 110.
  • each sail is curved.
  • connection curve 110 in its first part from lower edge of the flat part, is set back from the plane P containing the flat 10A face.
  • the support table is more thick.
  • the bundle of the two systems has also been represented. one at 68 ° (DBC / HBD generation 3) and the other at 90 ° (DBC / HBD generation 4).

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

Abstract

The axle box has a housing (2) receiving a rotational guide for the axle end. A support base (3) extends at either side of the housing to form two tongues (4) to engage the suspension springs. The support base can be formed integrally with a right angle triangle section. The support end faces can be smooth. The lower face of the support can be flat and angled at approximately twenty three degrees. The support base can have a pentangle section inscribed in a right angle triangle.

Description

L'invention se rapporte à une boite d'essieu pour véhicule ferroviaire.The invention relates to an axle box for a railway vehicle.

Classiquement une boite d'essieu comprend :

  • un corps logeant un moyen de guidage en rotation de l'extrémité d'un essieu et
  • à la base de ce corps, un support s'étendant de part et d'autre du corps précité pour former deux tables d'appui pour des ressorts de suspension.
Conventionally, an axle box includes:
  • a body housing a means for guiding the end of an axle in rotation, and
  • at the base of this body, a support extending on either side of the aforementioned body to form two support tables for suspension springs.

Ce support est encore appelé palette.This support is also called a pallet.

Les supports connus se présentent sous la forme d'une section sensiblement en I, c'est à dire comprenant une âme verticale reliant une platine inférieure et une platine supérieure, laquelle platine supérieure constitue généralement la paroi inférieure du corps logeant le moyen de guidage en rotation de l'essieu.Known supports are in the form of a section substantially in I, that is to say comprising a vertical core connecting a plate lower and an upper plate, which upper plate constitutes generally the lower wall of the body housing the guide means in axle rotation.

La largeur de la platine inférieure est plus faible que celle de la platine supérieure.The width of the lower plate is narrower than that of the plate higher.

Le support peut également être en caisson.The support can also be in a box.

Cette structure confère une bonne rigidité pour un poids minimal. This structure gives good rigidity for a minimum weight.

Mécaniquement, en outre deux voiles relient chacune des deux faces latérales et verticales du corps précité avec la table concernée, les faces internes de ces deux voiles formant un couloir de guidage vertical du déplacement de la boite d'essieu par rapport au châssis.Mechanically, in addition two sails connect each of the two faces lateral and vertical of the aforementioned body with the table concerned, the internal faces of these two sails forming a vertical guide corridor for the movement of the axle box in relation to the chassis.

Ces voiles comprennent une partie verticale fixée sur la face latérale du corps de la boite d'essieu et une partie de raccordement à la table, l'extrémité de cette partie de raccordement se situant sensiblement au milieu de la longueur de la table d'appui.These sails include a vertical part fixed on the lateral face of the axle box body and table connection part, end of this connection part located substantially in the middle of the length of the support table.

Classiquement, le corps de la boite d'essieu logeant les moyens de guidage contient également un lubrifiant.Conventionally, the body of the axle box housing the means of guide also contains a lubricant.

En fonctionnement normal, il se produit nécessairement une élévation de la température des moyens de guidage en rotation, du lubrifiant et par la même, du corps de la boite d'essieu et du support.In normal operation, there is necessarily an increase in the temperature of the guiding means in rotation, of the lubricant and by the the body of the axle box and the support.

En cas d'incident, cette température peut atteindre une valeur critique amenant une destruction des moyens de guidage en rotation, sauf à stopper le véhicule.In the event of an incident, this temperature may reach a critical value causing destruction of the rotating guide means, except to stop the vehicle.

Sur les wagons du type transport de marchandise, il n'est pas concevable économiquement d'équiper chaque boite d'essieu d'un détecteur de température relié à une centrale d'analyse.On wagons of the goods transport type, it is not conceivable economically to equip each axle box with a temperature connected to a central analysis.

Pour obvier à ce problème, le réseau ferroviaire est équipé au long des voies de moyens fixes de détection de la température des boites d'essieu et de transmission de l'information détectée, ces moyens fixes de détection étant appelés DBC (français) ou HBD (anglais).To overcome this problem, the rail network is equipped along the tracks of fixed means for detecting the temperature of the axle boxes and transmission of the detected information, these fixed detection means being called DBC (French) or HBD (English).

Ces moyens sont disposés au long des rails et émettent un faisceau en direction de la boite d'essieu pour capter ensuite le faisceau incident et en faire l'analyse pour, au moins en cas d'incident, transmettre l'information au chauffeur du train afin qu'il stoppe le convoi.These means are arranged along the rails and emit a beam in direction of the axle box to then capture the incident beam and make it analysis to, at least in the event of an incident, transmit the information to train driver to stop the train.

Sur la génération antérieure DBC/HBD génération 3, le faisceau était émis du sol depuis une position située latéralement aux rails et avec un angle de 68° pour taper de biais sous la platine supérieure du support portant le corps de boite.On the previous generation DBC / HBD generation 3, the beam was emitted from the ground from a position located laterally to the rails and at an angle of 68 ° to tap at an angle under the upper plate of the support carrying the body box.

La température détectée étant très proche de celle du lubrifiant, on parvenait à surveiller correctement la température de ces moyens de guidage. Since the temperature detected is very close to that of the lubricant, we managed to properly monitor the temperature of these guide means.

Si la platine supérieure est à une température proche de celle des moyens de guidage avec un facteur de correction, il n'en est pas de même de la platine inférieure qui est globalement à une température quatre fois inférieure.If the upper plate is at a temperature close to that of the means guide with a correction factor, it is not the same for the stage lower which is globally at a temperature four times lower.

Cette température de la platine inférieure n'est cependant pas un reflet exact de celle de la boite d'essieu, c'est à dire il n'y a pas une proportionnalité entre la température réelle et la température au point de mesure car de nombreux facteurs interviennent et un modèle mathématique ne peut être réellement envisageable.This temperature of the bottom plate does not, however, reflect exact of that of the axle box, that is to say there is not a proportionality between the actual temperature and the temperature at the measuring point because of many factors come into play and a mathematical model cannot be really possible.

Depuis peu, est apparue une nouvelle génération de moyens fixes de détection (DBC/HBC génération 4).Recently, a new generation of fixed means of detection (DBC / HBC generation 4).

L'angle d'émission du faisceau est désormais fixé à 90° par rapport au sol.The beam emission angle is now set at 90 ° to the ground.

En France, la position du moyen de détection est déterminée en fonction des bogies prévus à l'écartement standard et donc le moyen de détection est localisé pour que le faisceau tape sous la platine supérieure en évitant cependant la platine inférieure celle-ci étant moins large (voir figure 1).In France, the position of the detection means is determined according to bogies provided at standard spacing and therefore the detection means is localized so that the beam hits under the upper plate avoiding however the lower plate this being narrower (see Figure 1).

La position de ce moyen fixe de détection est donc déterminée pour un écartement en France entre les rails, de mille quatre cent trente cinq millimètres et entre les fusées d'essieu de deux mille millimètres ou deux mille quatre vingt millimètres.The position of this fixed detection means is therefore determined for a spacing in France between the rails, one thousand four hundred and thirty five millimeters and between the axle stub of two thousand millimeters or two thousand eighty millimeters.

Cependant sur le réseau ferroviaire français, circulent des wagons provenant d'autres pays et notamment d'Espagne qui sont conçus pour un écartement différent.However on the French rail network, wagons circulate from other countries and especially from Spain which are designed for a different spacing.

Pour le gabarit russe, les valeurs d'écartement sont respectivement de mille cinq cent vingt millimètres et deux mille trente six millimètres et pour le gabarit espagnol de mille six cent quatre vingt huit millimètres et deux mille cent soixante dix millimètres ou deux mille deux cent trente cinq millimètres.For the Russian gauge, the spacing values are respectively one thousand five hundred and twenty millimeters and two thousand thirty six millimeters and for the one thousand six hundred and eighty eight millimeters and two thousand spanish gauge one hundred and seventy millimeters or two thousand two hundred and thirty five millimeters.

Généralement, pour les véhicules capables de s'accommoder de deux écartements de rails différents (par exemple France/Espagne), on change les essieux pour que l'écartement entre les roues soit conforme à l'écartement du réseau considéré ; les boites d'essieux restent écartées de la plus grande valeur d'entraxe entre roulements et donc dans une zone telle que le faisceau vertical des nouveaux moyens de détection tape sur la platine inférieure. Generally, for vehicles capable of accommodating two different rail spacings (for example France / Spain), we change the axles so that the spacing between the wheels conforms to the spacing of the network considered; the axle boxes remain discarded by the highest value center-to-center between bearings and therefore in an area such as the vertical beam new detection means tap on the lower plate.

Dans le cas usuel d'une boíte classique à section en I, la température de la platine inférieure n'étant pas proportionnelle à la température de la boite d'essieu, le système de détection ne peut donc remplir sa fonction.In the usual case of a conventional box with I-section, the temperature of the lower plate is not proportional to the temperature of the box axle, the detection system cannot therefore fulfill its function.

L'invention se propose donc de remédier notamment à cet inconvénient.The invention therefore proposes to remedy this drawback in particular.

A cet effet, l'invention a pour objet une boite d'essieu du type précité comprenant :

  • un corps logeant un moyen de guidage en rotation de l'extrémité d'un essieu et
  • à la base de ce corps, un support s'étendant de part et d'autre du corps précité pour former deux tables d'appui pour des ressorts de suspension, ce support présentant une résistance mécanique prédéterminée,
    cette boite d'essieu étant caractérisé en ce que le support est une pièce homogène contenue dans une enveloppe de section globalement triangulaire rectangle.
To this end, the subject of the invention is an axle box of the aforementioned type comprising:
  • a body housing a means for guiding the end of an axle in rotation, and
  • at the base of this body, a support extending on either side of the aforementioned body to form two support tables for suspension springs, this support having a predetermined mechanical strength,
    this axle box being characterized in that the support is a homogeneous part contained in an envelope of generally triangular rectangle section.

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

  • figure 1 : une coupe d'une boíte d'essieu selon l'art antérieur et les moyens fixes de détection DBC/HBD,
  • figure 2 : une vue en perspective d'une boíte selon l'invention,
  • figure 3 : une coupe selon III-III de la figure 2.
The invention will be clearly understood with the aid of the description below, given by way of nonlimiting example, with reference to the attached drawing which schematically represents:
  • FIG. 1: a section through an axle box according to the prior art and the fixed DBC / HBD detection means,
  • FIG. 2: a perspective view of a box according to the invention,
  • Figure 3: a section on III-III of Figure 2.

En se reportant au dessin, on voit une boite 1 d'essieu se composant d'un corps 2 logeant un moyen de guidage en rotation de l'extrémité d'un essieu et, à la base de ce corps, d'un support 3 s'étendant de part et d'autre du corps précité pour former deux tables 4 d'appui pour des ressorts de suspension (non représentés).Referring to the drawing, we see an axle box 1 consisting of a body 2 housing a means for guiding the end of an axle in rotation and, the base of this body, of a support 3 extending on either side of the aforementioned body to form two support tables 4 for suspension springs (not shown).

Pour faciliter la compréhension, les moyens de guidage en rotation ne sont pas représentés.To facilitate understanding, the rotating guide means do not are not shown.

Les ressorts prennent donc appui sur la face supérieure 5 de chacune des tables 4 et indirectement sur le châssis, via par exemple, des chapeaux reliés au châssis par des anneaux obliques.The springs are therefore supported on the upper face 5 of each of the tables 4 and indirectly on the chassis, for example via caps connected to the chassis by oblique rings.

Les tables 4 sont donc en porte à faux par rapport à l'essieu ou le corps de la boite d'essieux. Tables 4 are therefore cantilevered with respect to the axle or the body of the axle box.

Ce support présente bien évidemment une résistance mécanique prédéterminée pour supporter les charges statiques et dynamiques induites notamment lors des déplacement du véhicule auquel est associée la boite d'essieu.This support obviously has mechanical strength predetermined to support the static and dynamic loads induced especially when moving the vehicle with which the gearbox is associated axle.

Selon une caractéristique de l'invention, le support 3 est une pièce homogène contenue dans une enveloppe 6 de section globalement triangulaire rectangle.According to a characteristic of the invention, the support 3 is a part homogeneous contained in an envelope 6 of generally triangular section rectangle.

L'enveloppe a été représentée en trait mixte.The envelope has been shown in phantom.

Par homogène, on comprendra notamment une pièce dépourvue, dans sa zone utile, de cavité ou d'inclusions de matériaux différents modifiant localement la propagation thermique dans la pièce.By homogeneous, one will understand in particular a part devoid, in its useful area, cavity or inclusions of different materials modifying locally the thermal propagation in the room.

Ainsi, dans une telle pièce, la propagation thermique depuis la face supérieure en contact ou au moins indirectement en contact avec le lubrifiant contenu dans la boite d'essieu se fait selon une règle de proportionnalité linéaire connue qui dépend principalement de la conductivité thermique du matériau et de l'épaisseur dudit matériau.So in such a room, the thermal propagation from the face superior in contact or at least indirectly in contact with the lubricant contained in the axle box is made according to a proportionality rule known linear which mainly depends on the thermal conductivity of the material and the thickness of said material.

Egalement, on minimise les effets externes, c'est à dire le refroidissement lié au déplacement dans l'air du support.Also, we minimize external effects, i.e. cooling related to the movement in the air of the support.

Les faces externes du support seront donc lisses et dépourvues d'aspérités conséquentes, de nervures ou de rainures, ayant pour effet d'agir comme un radiateur.The external faces of the support will therefore be smooth and devoid of roughness consequent, of ribs or grooves, having the effect of acting as a radiator.

La face verticale du support tournée vers l'essieu pourrait, éventuellement, être pourvue de rainures ou nervures sous réserve que l'influence de cette nervure ou rainure ne soit pas perceptible dans la partie du support utilisée.The vertical face of the support facing the axle could, possibly be provided with grooves or ribs provided that the influence of this rib or groove is not perceptible in the part of the medium used.

La rainure ne devra donc pas être profonde.The groove should therefore not be deep.

L'un 7 des côtés de la section triangulaire à angle droit forme la face horizontale et supérieure du support; la face verticale 8, donc orthogonale à cette face 7 horizontale, est tournée vers l'intérieur c'est à dire vers le centre de l'essieu.One 7 of the sides of the right angle triangular section forms the face horizontal and upper support; the vertical face 8, therefore orthogonal to this horizontal face 7, is turned inward, that is to say towards the center of the axle.

Le faisceau incident puis réfléchi vient donc taper sur la face inférieure constituant l'hypoténuse du triangle. The incident and then reflected beam therefore hits the underside constituting the hypotenuse of the triangle.

Le point de contact peut être plus ou moins éloigné de la face verticale selon la position de la boite d'essieu mais ce point étant connu et, dans la mesure où il y une bonne homogénéité et que la règle de propagation thermique dans ce corps homogène est connue ainsi que la position du faisceau incident, il est assez facile d'extrapoler la température du lubrifiant.The contact point can be more or less distant from the vertical face depending on the position of the axle box but this point being known and, in the measure that there is a good homogeneity and that the propagation rule thermal in this homogeneous body is known as well as the position of the beam incident, it is quite easy to extrapolate the temperature of the lubricant.

La partie 100 ou zone utile dans laquelle se fait la mesure s'étend sensiblement sur les deux tiers de la largeur du support depuis son extrémité amincie.The part 100 or useful area in which the measurement is made extends substantially over two-thirds of the width of the support from its end thinned.

L'enveloppe convective sera minimale pour une résistance mécanique du support identique à celle d'un profilé en I.The convective envelope will be minimal for a mechanical resistance of the support identical to that of an I-section.

La face 9 inférieure du support c'est à dire celle inclinée est sensiblement plane. Elle forme avec un plan horizontal un angle de l'ordre de 23°.The lower face 9 of the support, that is to say the inclined one, is substantially plane. It forms with an horizontal plane an angle of the order of 23 °.

L'extrémité 4A de chacune des tables 4 est arrondie de manière à minimiser l'influence du refroidissement de l'air et donc de la perte thermique par dissipation.The end 4A of each of the tables 4 is rounded so as to minimize the influence of air cooling and therefore of heat loss by dissipation.

La section du support n'est pas exactement triangulaire rectangle.The section of the support is not exactly triangular rectangle.

Il s'agit plus précisément d'une section du type tétragonale comprenant deux angles droits voire une section pentagonale inscrite dans un triangle rectangle là où les pointes du triangle sont tronqués.It is more precisely a section of the tetragonal type comprising two right angles or even a pentagonal section inscribed in a triangle rectangle where the points of the triangle are truncated.

On constate que, pour une température de 120° du lubrifiant, la température de la face inférieure du support est de l'ordre de70° ce qui encore une température exploitable.It can be seen that, for a temperature of 120 ° of the lubricant, the temperature of the underside of the support is around 70 ° which again an exploitable temperature.

En fonderie, une telle pièce est très facile à réaliser .In foundry, such a part is very easy to produce.

Comme indiqué plus haut, la boite d'essieu est pourvue sur ces deux cotés 10 latéraux de moyens 11 de guidage en translation vertical de la boite.As indicated above, the axle box is provided on these two sides 10 lateral means 11 for guiding the vertical translation of the box.

Chaque moyen de guidage est constitué au moins indirectement par la face 10A latérale plane du corps de la boite et deux voiles 12 situées dans des plans coplanaires à la section de l'essieu.Each guide means is constituted at least indirectly by the flat side face 10A of the body of the box and two sails 12 located in coplanar planes to the axle section.

Selon une caractéristique de l'invention, la hauteur H de chaque voile est limitée pour que ce voile ne soit fixé essentiellement que sur la face 10A plane latérale de la boite d'essieu, laquelle face 10A latérale a son bord 10B inférieur qui se raccorde sur toute sa largeur à la table d'appui par une large courbe 110.According to a characteristic of the invention, the height H of each sail is limited so that this veil is essentially fixed only on the flat face 10A side of the axle box, which face 10A lateral has its edge 10B lower which is connected over its entire width to the support table by a wide curve 110.

Le bord libre de chaque voile est courbe. The free edge of each sail is curved.

La courbe 110 de raccordement, dans sa première partie à compter du bord inférieur de la partie plane, se trouve en retrait par rapport au plan P contenant la face 10A plane.The connection curve 110, in its first part from lower edge of the flat part, is set back from the plane P containing the flat 10A face.

Localement, au niveau de ce raccordement, la table d'appui est alors plus épaisse.Locally, at this connection, the support table is more thick.

L'avantage de cette conception, c'est la suppression des surcontraintes qui, antérieurement, se localisaient au niveau des zones de raccordement des voiles.The advantage of this design is the elimination of over-stresses which, previously, they were located at the connection areas of the sails.

En outre, en ayant découplé, physiquement les reprises latérales et la zone de raccordement de la table au corps, le travail se fait sur toute la largeur de la zone de raccordement et on profite du potentiel élastique des tables.In addition, having decoupled, physically the lateral recoveries and the area connecting the table to the body, the work is done over the entire width of the connection area and we take advantage of the elastic potential of the tables.

Ainsi, avec cette nouvelle solution, toute la matière du support participe à la contrainte mécanique ce qui permet par ailleurs de réduire le volume du dit support et donc les pertes thermiques par radiation.So, with this new solution, all the support material participates in mechanical stress which also reduces the volume of said support and therefore heat losses by radiation.

En comparant la figure 1 à la figure 3, on constate bien la différence avec l'art antérieur utilisant un profil en I.By comparing Figure 1 to Figure 3, we can clearly see the difference with the prior art using an I-profile.

Sur la figure 1, on a également représenté le faisceau des deux systèmes de mesure, l'un à 68° (DBC/HBD génération 3) et l'autre à 90° (DBC/HBD génération 4).In FIG. 1, the bundle of the two systems has also been represented. one at 68 ° (DBC / HBD generation 3) and the other at 90 ° (DBC / HBD generation 4).

Claims (9)

Boíte d'essieu pour véhicule ferroviaire se composant d'un corps (2) logeant un moyen de guidage en rotation de l'extrémité d'un essieu et, à la base de ce corps, d'un support (3) s'étendant de part et d'autre du corps précité pour former deux tables (4) d'appui pour des ressorts de suspension,
   cette boíte étant CARACTERISEE en ce que le support (3) est une pièce homogène contenue dans une enveloppe (6) de section globalement triangulaire rectangle.Axle box for a rail vehicle consisting of a body (2) housing a means for guiding in rotation the end of an axle and, at the base of this body, of a support (3) extending on either side of the aforementioned body to form two support tables (4) for suspension springs,
this box being CHARACTERIZED in that the support (3) is a homogeneous part contained in an envelope (6) of generally triangular rectangle section. Boíte d'essieu selon la revendication 1 caractérisée en ce que les faces externes du support sont lisses.Axle box according to claim 1 characterized in that the external faces of the support are smooth. Boíte d'essieu selon la revendication 1 caractérisée en ce que l'un (7) des côtés de la section triangulaire à angle droit forme la face horizontale et supérieure du support et la face verticale (8), donc orthogonale à cette face (7) horizontale, est tournée vers l'intérieur c'est à dire vers le centre de l'essieu.Axle box according to claim 1 characterized in that one (7) of the sides of the triangular section at right angles forms the horizontal and upper face of the support and the vertical face (8), therefore orthogonal to this face (7 ) horizontal, faces inward, i.e. towards the center of the axle. Boíte d'essieu selon la revendication 1 caractérisée en ce que l'enveloppe convective est minimale pour une résistance mécanique du support identique à celle d'un profilé en I ou en caisson.Axle box according to claim 1 characterized in that the convective envelope is minimal for a mechanical resistance of the support identical to that of an I-section or box. Boíte d'essieu selon la revendication 1 caractérisée en ce que la face (9) inférieure du support, c'est à dire celle inclinée est sensiblement plane et forme avec un plan horizontal un angle de l'ordre de 23°.Axle box according to claim 1 characterized in that the lower face (9) of the support, that is to say that the inclined one is substantially planar and forms with an horizontal plane an angle of the order of 23 °. Boíte d'essieu selon la revendication 1 caractérisée en ce que l'extrémité (4A) de chacune des tables (4) est arrondie.Axle box according to claim 1 characterized in that the end (4A) of each of the tables (4) is rounded. Boíte d'essieu selon la revendication 1 caractérisée en ce que la section du support est une section pentagonale inscrite dans un triangle rectangle.Axle box according to claim 1 characterized in that the support section is a pentagonal section inscribed in a right triangle. Boíte d'essieu selon la revendication 1 comprenant en outre, sur ces deux cotés (10) latéraux des moyens (11) de guidage en translation vertical de la boite, chaque moyen de guidage étant constitué au moins indirectement par la face (10A) latérale plane du corps de la boite et deux voiles (12) situées dans des plans coplanaires à la section de l'essieu, caractérisée en ce que la hauteur (H) de chaque voile est limitée pour que ce voile ne soit fixé essentiellement que sur la face (10A) plane latérale de la boite d'essieu, laquelle face (10A) latérale a son bord (10B) inférieur qui se raccorde sur toute sa largeur à la table d'appui par une large courbe (110). Axle box according to claim 1 further comprising, on these two lateral sides (10) means (11) for guiding in vertical translation of the box, each guide means being constituted at least indirectly by the side face (10A) plane of the body of the box and two walls (12) located in coplanar planes at the cross section of the axle, characterized in that the height (H) of each wall is limited so that this wall is essentially fixed only on the side face (10A) plane of the axle box, which side face (10A) has its lower edge (10B) which is connected over its entire width to the support table by a wide curve (110). Boíte d'essieu selon la revendication 8 caractérisée en ce que la courbe (110) de raccordement, dans sa première partie à compter du bord inférieur de la partie plane, se trouve en retrait par rapport au plan (P) contenant la face (10A) plane.Axle box according to claim 8 characterized in that the connection curve (110), in its first part from the lower edge of the flat part, is set back from the plane (P) containing the face (10A ) plane.
EP01490027A 2001-07-17 2001-07-17 Axle-box for railway vehicles Withdrawn EP1277640A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01490027A EP1277640A1 (en) 2001-07-17 2001-07-17 Axle-box for railway vehicles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01490027A EP1277640A1 (en) 2001-07-17 2001-07-17 Axle-box for railway vehicles

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EP1277640A1 true EP1277640A1 (en) 2003-01-22

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640737A (en) * 1949-08-15 1953-06-02 Timken Roller Bearing Co One-piece forged steel railway journal box
FR1496797A (en) * 1966-08-23 1967-10-06 Skf Svenska Kullagerfab Ab Lightweight vertically molded axle box
EP0263896A1 (en) * 1986-10-17 1988-04-20 SIGNALTECHNIK GmbH Method for the external measurement of the temperatures of the axle or axle bearing of running railway coaches, and device for carrying out the method
US4766819A (en) * 1987-03-26 1988-08-30 National Castings, Inc. Saddle frame for passive steering single-axle truck for a railway freight car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640737A (en) * 1949-08-15 1953-06-02 Timken Roller Bearing Co One-piece forged steel railway journal box
FR1496797A (en) * 1966-08-23 1967-10-06 Skf Svenska Kullagerfab Ab Lightweight vertically molded axle box
EP0263896A1 (en) * 1986-10-17 1988-04-20 SIGNALTECHNIK GmbH Method for the external measurement of the temperatures of the axle or axle bearing of running railway coaches, and device for carrying out the method
US4766819A (en) * 1987-03-26 1988-08-30 National Castings, Inc. Saddle frame for passive steering single-axle truck for a railway freight car

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