[go: up one dir, main page]

WO2010115248A1 - Elastic lateral bearing for a railway vehicle, method of manufacturing such a bearing and railway vehicle - Google Patents

Elastic lateral bearing for a railway vehicle, method of manufacturing such a bearing and railway vehicle Download PDF

Info

Publication number
WO2010115248A1
WO2010115248A1 PCT/BE2010/000030 BE2010000030W WO2010115248A1 WO 2010115248 A1 WO2010115248 A1 WO 2010115248A1 BE 2010000030 W BE2010000030 W BE 2010000030W WO 2010115248 A1 WO2010115248 A1 WO 2010115248A1
Authority
WO
WIPO (PCT)
Prior art keywords
fitted
vehicle
block
bar
base
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.)
Ceased
Application number
PCT/BE2010/000030
Other languages
French (fr)
Inventor
Rudi Mertens
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.)
Bureau Mertens
Original Assignee
Bureau Mertens
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bureau Mertens filed Critical Bureau Mertens
Publication of WO2010115248A1 publication Critical patent/WO2010115248A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
    • B61F5/14—Side bearings
    • B61F5/142—Side bearings made of rubber elements, graphite or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
    • F16F1/44—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded mainly in compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
    • F16F3/087—Units comprising several springs made of plastics or the like material
    • F16F3/0873—Units comprising several springs made of plastics or the like material of the same material or the material not being specified
    • F16F3/0876—Units comprising several springs made of plastics or the like material of the same material or the material not being specified and of the same shape

Definitions

  • Lateral elastic support for a railway vehicle Method of manufacturing such a support and railway vehicle.
  • the invention relates to railway vehicles mounted on bogies. It relates more particularly to the elastic lateral supports intended for these railway vehicles. State of the art
  • elastic lateral supports also known as “constant contact side bearings” between the bogies and the vehicle body.
  • These elastic lateral supports are arranged in pairs, on either side of the bogie articulation bearing to the vehicle body. They comprise, in a conventional manner, a base attached to the chassis of the truck and a pad which is pushed vertically against the bottom of the vehicle body by a spring. Their function is double. On the one hand, they serve to limit the roll movements of the body relative to the bogie; on the other hand, by exerting a friction force on the body, they dampen the oscillations of yaw of the bogie around its normal trajectory on the track.
  • the base comprises a cylinder of square section containing the spring and the slide slides vertically in this cylinder, against the spring.
  • the spring consists of a particular block of thermoplastic elastomer, having successively undergone compression deformation beyond the elastic limit of the elastomer and expansion.
  • the pad and the wall of the cylinder are the seat of intense frictional forces, generated by a combination of vertical displacements of the pad in the cylinder and lateral stresses caused by the movement of the vehicle, especially the yaw movement of the bogie. These friction forces cause progressive wear of the pad and the walls of the cylinder, causing excessive play between the pad and the cylinder, which affects the performance of the elastic support, making it quickly inoperative.
  • the invention aims to remedy the disadvantages of the known elastic lateral support described above.
  • the invention aims more particularly to provide an elastic lateral support which is not affected by wear phenomena and which has improved performance and a long service life.
  • the invention also aims to provide a method of manufacturing such an elastic lateral support, and a rail vehicle whose performance is improved. Consequently, the invention relates to an elastic lateral support for a railway vehicle, comprising, between a base designed to be secured to a bogie of the vehicle and a pad intended to bear against the body of the vehicle, a block of thermoplastic elastomer having successively undergone compression deformation beyond the elastic limit of the elastomer and a relaxation; according to the invention, the support is characterized in that the block is fitted on a substantially indeformable bar, integral with the base, in that at least a second block of thermoplastic elastomer is fitted on a second substantially non-deformable bar, integral of the pad and in that the two blocks pass through a substantially indeformable sheet interposed between the base and the pad.
  • the base and the pad are normally two substantially indeformable metal plates (generally made of steel or cast iron).
  • the plate forming the base is designed to be secured to the bogie of a railway vehicle, for example by bolting to a cross member of the bogie frame.
  • the plate forming the shoe is profiled to come to apply on a reinforcement of the bottom of the vehicle body, in the vicinity of the axis of the hinge of the truck to the vehicle. It is intended to slide on this reinforcement, during the normal traffic of the vehicle on a railway track. For this purpose, it is pushed against the vehicle body by means of a spring bearing on the base.
  • thermoplastic elastomer blocks have elastic properties and together form a spring between the base and the pad.
  • an elastomer is a macromolecular material having elastic properties.
  • a thermoplastic elastomer is an elastomer that retains elastic properties after having undergone permanent deformation by plastic creep under the action of a compressive force.
  • the compressive elastic properties of the thermoplastic elastomer which has undergone the remanent deformation are normally different from those of the elastomer prior to deformation.
  • Thermoplastic elastomers are well known in the art and are generally synthetic elastomers.
  • thermoplastic elastomer blocks is not critical for the definition of the invention.
  • Thermoplastic polyesters are advantageously used.
  • thermoplastic polyesters suitable for the invention belong to the family of copolymers of polyether esters. Copolymers obtained by transesterification of an ester derived from phthalic acid, a low molecular weight glycol and a polyether glycol are suitable, including those sold under the trademark HYTREL ® (Du Pont). Information concerning these copolymers is particularly accessible in the document Polymer Engineering and Science, December 1974, Vol. 14, No. 12, pages 848-852, as well as in the document Encyclopedia of Polymer Science and Technology, Supl. Flight. II, Wiley & Son, New York, 1977, pp. 484-509. The elastomers known under the trademark ARNITEL ® (DSM) are particularly well suited.
  • ARNITEL ® DSM
  • the two blocks can be made in the same thermoplastic elastomer or in different elastomers. It is preferred that they be made of the same thermoplastic elastomer
  • thermoplastic elastomer blocks equipping the support according to the invention has undergone a suitable mechanical treatment, comprising compression deformation beyond the elastic limit of the thermoplastic elastomer, the compression being followed by expansion of the block.
  • mechanical treatment which has just been described will be referred to as “mechanical compression / expansion treatment” and the expression “compression axis” will designate the direction of the compression force used in the treatment.
  • compression / relaxation At the end of the mechanical compression / expansion treatment, the thermoplastic elastomer block retains a remanent deformation, which depends on the size of the compression force and the selected thermoplastic elastomer.
  • the compression force In the mechanical compression / expansion treatment, the compression force must be greater than the elastic limit of the thermoplastic elastomer, so that the tubular block retains a remanent deformation.
  • the optimum size of the compressive force will depend on the shape and dimensions of the tubular block, as well as the thermoplastic elastomer and the desired properties for elastic lateral support. It must be determined in each particular case by the person skilled in the art. Information concerning the mechanical compression / expansion treatment can be found in the documents US-A-4 198 037, GB-A-2 180 618 and WO
  • the mechanical compression / expansion treatment can be accompanied by a suitable heat treatment before, during or after exercising the compression effort.
  • Information concerning this heat treatment can be found in US-A-4 198 037.
  • the compression axis defined above is generally rectilinear; it is generally confused with an axis of symmetry of the block, which is preferably cylindrical.
  • the sheet interposed between the base and the pad is normally pierced by two openings, which are crossed by the two blocks.
  • the sheet is usually a steel sheet, although another rigid material may also be suitable. It normally occupies an intermediate position between the base and the pad, so that its two openings are crossed respectively by the two bars of the two tubular blocks.
  • the two thermoplastic elastomer blocks constitute a compression spring between the plate and the pad, sliding along the two bars.
  • the plate and the bars also cooperate to prevent relative substantial lateral displacement of the pad vis-à-vis the base, during normal use of the support on a rail vehicle.
  • the tubular blocks have the shape of a bellows, with a neck or narrowing between two successive ring rolls. At the neck, the block encloses the bar on which it is fitted and it is enclosed in the opening of the sheet, through which it passes.
  • this embodiment of the invention reinforces the lateral rigidity of the support and consequently reduces the lateral play of the pad with respect to the base.
  • the block which is fitted on the bar integral with the base is also fitted on a tenon integral with the pad; similarly, the block which is fitted on the bar integral with the pad is also fitted on a tenon secured to the base.
  • the tenons are located in the extension of the bars, from which they are sufficiently spaced to allow the pad and the base to be moved towards each other to compress the tubular blocks. Fixing the tenons at the base and the pad can be obtained by any suitable means, for example by welding.
  • thermoplastic elastomer blocks have a neck at each end and these collars respectively grip the bar and the pin on which they are fitted.
  • the elastic lateral support according to the invention may comprise more than two thermoplastic elastomer blocks. Alternatively, it can also to understand more than one indeformable sheet between the base and the skate.
  • the invention also relates to an original method for the manufacture of a lateral support according to the invention, according to which an assembly comprising two thermoplastic elastomer tubes, sandwiched between two metal plates and passing through two openings is used. a metal sheet interposed between the two plates, one of the tubes being fitted on a bar fixed transversely to one of the plates and the other tube being fitted on another bar fixed to the other plate, the two plates are brought together to compress the two tubes beyond the elastic limit of the elastomer so as to give them a remanent deformation and then release the compression force.
  • the tubes preferably have a straight cylindrical outer profile, the cross section substantially corresponds to the openings of the sheet through which they pass.
  • the tubes undergo a contraction in the direction of the compressive force and a lateral expansion, on both sides of the openings of the sheet. They thus adopt the shape of a bellows comprising two annular flanges on either side of a collar clamped elastically in the corresponding opening of the sheet. After exerting the compression effort, release it.
  • the openings made in the sheet must therefore be calibrated to allow the formation of the aforementioned neck during compression and after expansion.
  • the plates used each have a pin on which one of the tubes is enclosed.
  • the elastic lateral support according to the invention is intended to equip bogie-mounted railway vehicles.
  • the invention therefore also relates to a railway vehicle comprising a hinged body on at least one bogie and, between the bogie and the body, two elastic lateral supports according to the invention, which are disposed substantially symmetrically on either side of the articulation of the body to the said bogie.
  • the definition of the railway vehicle and its destination are not critical for the definition of the invention.
  • the invention thus applies equally to railway cars for the transport of passengers, to wagons for the transport of goods, to traction machines, as well as to self-propelled vehicles used on interurban railways or for urban trams.
  • the two lateral supports are arranged symmetrically on either side of the articulation of the vehicle body to the bogie. It is recommended that each support be positioned in such a way that the two openings of the sheet which equips it are substantially aligned parallel to the longitudinal axis of the vehicle.
  • the invention is especially recommended for passenger cars and freight wagons. Brief description of the figures
  • Figure 1 is a front view of a portion of a bogie equipped with a pair of resilient lateral supports
  • Figure 2 shows, in plan, a portion of a bogie equipped with an elastic lateral support
  • Figure 3 is a diagram, in vertical cross section, of an elastic lateral support prior to the invention.
  • Figure 4 is a vertical cross-sectional diagram of a preferred embodiment of the resilient lateral support of the invention.
  • the reference numeral 1 designates a cross-bar of a bogie.
  • the cross member 1 is part of the bogie frame and carries, in its central part, a hinge element 2 of the bogie to the frame 3 of the body of a railway car (not shown).
  • a pair of elastic lateral supports 4 are interposed between the crossbar 1 and the chassis 3, symmetrically with respect to the vertical axis 5 of rotation of the articulation 2.
  • the bogie represented in FIG. 2 comprises a chassis 14 mounted on two sets of wheels 16 (only one wheel 16 being shown).
  • the cross member 1 (shown schematically in Figure 1) is an integral part of the frame 14 where it is arranged parallel to the two sets of wheels 16, halfway therefrom.
  • Figure 2 shows an elastic lateral support 4 on the crossbar 1.
  • a second elastic lateral support (not shown) is located on the crossbar 1, so that the joint 2 is substantially halfway between the two supports.
  • Figure 3 shows on a larger scale elastic lateral support prior to the invention.
  • This comprises a base plate 6 and a shoe 7.
  • the base plate 6 is intended to be fixed to the crossbar 1 of the bogie, for example by means of an assembly by bolts and nuts. It forms the bottom of a vertical cylinder 8 of square, rectangular or circular section.
  • the shoe 7 constitutes the upper part of a piston 9 slidably mounted in the cylinder 8, against a compression spring 10.
  • the function of the spring is to push the shoe 7 against the frame 3 of the body of the wagon ( Figure 1), the shoe being profiled to slide on said frame 1 when the bogie 14 pivots on the hinge 2 about the vertical axis 5.
  • a central stop 12 of the base and a central bar 13 of the pad 7 limit the displacement of the piston 9 in the cylinder 8.
  • the bogie 14 When a wagon runs on a railway track, the bogie 14 is rotated on its pivot 2, about the axis 5. Simultaneously the piston 9 undergoes vertical reciprocating movements in the direction of the arrow Z in the cylinder 8, under the effect of roll movements of the body. Under the effect of the rotations of the bogie 14 on the pivot 2, around the vertical axis 5, the piston 9 is further subjected to reciprocating movements in the direction of the arrows X, limited by the clearance between the cylinder 8 and the piston 9. The combination of all these displacements of the piston 9 generates a progressive wear of the piston 9 and the cylinder walls 8, accentuating the clearance between these two elements of the support, which quickly becomes inoperative and must be replaced.
  • the elastic lateral support shown in FIG. 4 is in accordance with the invention.
  • a bar 13 is fixed vertically to the pad 7 and a similar bar 17 is fixed vertically to the base 6.
  • a pin 12 is fixed to the base 6 in line with the bar 13 and a similar pin 18 is fixed to 7, facing the bar 17.
  • a tubular block 19 is fitted on the bar 13 of the pad 7 and on the pin 12 of the base 6.
  • a tubular block 20 is fitted on the bar 17 of the base 6 and on the pin 18 of the pad 7.
  • the two tubular blocks 19 and 20 also pass through two circular openings 26 and 27 of a metal sheet 21, situated half way between the pad 7 and the base 6.
  • the bars 13 and 17 have a sufficient length to pass through the openings 26 and 27.
  • the tubular blocks 19 and 20 are made of thermoplastic elastomer and have the appearance of a bellows with two annular flanges 22 separated by a circular neck 23 and terminated by two end necks 24 and 25.
  • the neck 23 and the neck 24 of the tubular block 19 resiliently grip the bar 13 and its neck 25 elastically grips the tenon 12 of the base 6.
  • the neck 23 and the neck 25 of the tubular block 20 elastically grip the bar 17 and its neck 24 elastically grips the tenon 18 of the skate 7.
  • the neck 23 of the block 19 is gripped elastically in the opening 26 of the sheet 21 and the neck 23 of the block 20 is gripped elastically in the opening 27 of the sheet 21.
  • the tubular blocks 19 and 20 were obtained in subjecting two straight cylindrical tubes to a mechanical compression / expansion treatment comprising compression of the cylindrical tube beyond the elastic deformation limit of the elastomer and expansion.
  • a mechanical compression / expansion treatment comprising compression of the cylindrical tube beyond the elastic deformation limit of the elastomer and expansion.
  • the cylindrical tubes retain a remanent deformation giving them the appearance shown schematically in Figure 4 and explained above.
  • the base 6 is fixed on a crossbar of a bogie of the vehicle and the springs 19 and 20 are compressed within the elastic limit of one elastomer, so as to push the pad 7 against the bottom of the vehicle body.
  • the movements of the pad in the direction of the arrows X are counteracted by the plate 21 and the bars 13 and 17.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Vibration Prevention Devices (AREA)

Abstract

Elastic lateral bearing for a railway vehicle, comprising a substantially non-deformable metal plate (21) which is interposed between a base (6) designed to be secured to a bogie (14) of the vehicle and a shoe (7) intended to bear against the body (3) of the vehicle and which is traversed by two blocks of thermoplastic elastomer (19, 20) having successively undergone a deformation by compression beyond the elastic limit of the elastomer and a relaxation, the two blocks being respectively fitted onto two substantially non-deformable bars (13, 17) which are respectively secured to the base (6) and to the shoe (7).

Description

Appui latéral élastique pour véhicule ferroviaire, procédé de fabrication d'un tel appui et véhicule ferroviaire .Lateral elastic support for a railway vehicle, method of manufacturing such a support and railway vehicle.

Domaine de l ' inventionField of the invention

L'invention se rapporte aux véhicules ferroviaires montés sur bogies. Elle concerne plus particulièrement les appuis latéraux élastiques destinés à ces véhicules ferroviaires . Etat de la techniqueThe invention relates to railway vehicles mounted on bogies. It relates more particularly to the elastic lateral supports intended for these railway vehicles. State of the art

Dans les véhicules ferroviaires montés sur bogies, il est habituel de disposer des appuis latéraux élastiques (également connus sous la dénomination anglo- saxonne « constant contact side bearings ») entre les bogies et la caisse du véhicule. Ces appuis latéraux élastiques sont disposés par paires, de part et d'autre du palier d'articulation du bogie à la caisse du véhicule. Ils comprennent, de manière classique, une base fixée au châssis du bogie et un patin qui est repoussé verticalement contre le fond de la caisse du véhicule par un ressort. Leur fonction est double. D'une part, ils servent à limiter les mouvements de roulis de la caisse par rapport au bogie ; d'autre part, en exerçant un effort de friction sur la caisse, ils amortissent les oscillations de lacet du bogie autour de sa trajectoire normale sur la voie. En d'autres termes, ils stabilisent le roulement du véhicule sur la voie et, par voie de conséquence, ils permettent des vitesses de circulation plus élevées sur les voies de chemin de fer. Un appui latéral élastique connu de ce type est décrit dans le document US 4 712 487. Dans cet appui connu, la base comprend un cylindre de section carrée contenant le ressort et le patin coulisse verticalement dans ce cylindre, à l' encontre du ressort. Le ressort est constitué d'un bloc particulier en élastomère thermoplastique, ayant successivement subi une déformation par compression au-delà de la limite élastique de l' élastomère et une détente.In railway vehicles mounted on bogies, it is usual to have elastic lateral supports (also known as "constant contact side bearings") between the bogies and the vehicle body. These elastic lateral supports are arranged in pairs, on either side of the bogie articulation bearing to the vehicle body. They comprise, in a conventional manner, a base attached to the chassis of the truck and a pad which is pushed vertically against the bottom of the vehicle body by a spring. Their function is double. On the one hand, they serve to limit the roll movements of the body relative to the bogie; on the other hand, by exerting a friction force on the body, they dampen the oscillations of yaw of the bogie around its normal trajectory on the track. In other words, they stabilize the rolling of the vehicle on the track and, as a result, they allow higher traffic speeds on the railway tracks. A known elastic lateral support of this type is described in document US Pat. No. 4,712,487. known, the base comprises a cylinder of square section containing the spring and the slide slides vertically in this cylinder, against the spring. The spring consists of a particular block of thermoplastic elastomer, having successively undergone compression deformation beyond the elastic limit of the elastomer and expansion.

Dans cet appui connu, le patin et la paroi du cylindre sont le siège d'efforts de frottement intenses, engendrés par une combinaison des déplacements verticaux du patin dans le cylindre et des sollicitations latérales provoquées par le déplacement du véhicule, spécialement le mouvement de lacet du bogie. Ces efforts de frottements provoquent une usure progressive du patin et des parois du cylindre, entraînant un jeu excessif entre le patin et le cylindre, ce qui affecte les performances de l'appui élastique, rendant celui-ci rapidement inopérant .In this known support, the pad and the wall of the cylinder are the seat of intense frictional forces, generated by a combination of vertical displacements of the pad in the cylinder and lateral stresses caused by the movement of the vehicle, especially the yaw movement of the bogie. These friction forces cause progressive wear of the pad and the walls of the cylinder, causing excessive play between the pad and the cylinder, which affects the performance of the elastic support, making it quickly inoperative.

Résumé de l'invention L'invention vise à remédier aux inconvénients de l'appui latéral élastique connu décrit plus haut.SUMMARY OF THE INVENTION The invention aims to remedy the disadvantages of the known elastic lateral support described above.

L'invention vise plus particulièrement à fournir un appui latéral élastique qui est peu affecté par des phénomènes d'usure et qui présente des performances améliorées et une longue durée de vie.The invention aims more particularly to provide an elastic lateral support which is not affected by wear phenomena and which has improved performance and a long service life.

L'invention a aussi pour objectif de fournir un procédé de fabrication d'un tel appui latéral élastique, ainsi qu'un véhicule ferroviaire dont les performances sont améliorées. En conséquence, l'invention concerne un appui latéral élastique pour véhicule ferroviaire, comprenant, entre une base conçue pour être solidarisée à un bogie du véhicule et un patin destiné à prendre appui contre la caisse du véhicule, un bloc en élastomère thermoplastique ayant subi successivement une déformation par compression au-delà de la limite élastique de l' élastomère et une détente ; selon l'invention, l'appui se caractérise en ce que le bloc est emmanché sur un barreau sensiblement indéformable, solidaire de la base, en ce qu'au moins un second bloc en élastomère thermoplastique est emmanché sur un second barreau sensiblement indéformable, solidaire du patin et en ce que les deux blocs traversent une tôle sensiblement indéformable, interposée entre la base et le patin.The invention also aims to provide a method of manufacturing such an elastic lateral support, and a rail vehicle whose performance is improved. Consequently, the invention relates to an elastic lateral support for a railway vehicle, comprising, between a base designed to be secured to a bogie of the vehicle and a pad intended to bear against the body of the vehicle, a block of thermoplastic elastomer having successively undergone compression deformation beyond the elastic limit of the elastomer and a relaxation; according to the invention, the support is characterized in that the block is fitted on a substantially indeformable bar, integral with the base, in that at least a second block of thermoplastic elastomer is fitted on a second substantially non-deformable bar, integral of the pad and in that the two blocks pass through a substantially indeformable sheet interposed between the base and the pad.

Description détaillée de l'invention Dans l'appui selon l'invention, la base et le patin sont normalement deux plaques métalliques sensiblement indéformables (généralement en acier ou en fonte) . La plaque formant la base est conçue pour à être solidarisée au bogie d'un véhicule ferroviaire, par exemple par boulonnage sur une traverse du châssis du bogie.DETAILED DESCRIPTION OF THE INVENTION In the support according to the invention, the base and the pad are normally two substantially indeformable metal plates (generally made of steel or cast iron). The plate forming the base is designed to be secured to the bogie of a railway vehicle, for example by bolting to a cross member of the bogie frame.

La plaque formant le patin est profilée pour venir s'appliquer sur un renfort du fond de la caisse du véhicule, au voisinage de l'axe de l'articulation du bogie au véhicule. Elle est destinée à glisser sur ce renfort, pendant la circulation normale du véhicule sur une voie de chemin de fer. A cet effet, elle est repoussée contre la caisse du véhicule au moyen d'un ressort prenant appui sur la base.The plate forming the shoe is profiled to come to apply on a reinforcement of the bottom of the vehicle body, in the vicinity of the axis of the hinge of the truck to the vehicle. It is intended to slide on this reinforcement, during the normal traffic of the vehicle on a railway track. For this purpose, it is pushed against the vehicle body by means of a spring bearing on the base.

Les blocs en élastomère thermoplastique possèdent des propriétés élastiques et forment ensemble un ressort entre la base et le patin. Par définition, un élastomère est une matière macromoléculaire présentant des propriétés élastiques. Un élastomère thermoplastique est un élastomère qui conserve des propriétés élastiques après avoir subi une déformation rémanente par fluage plastique sous l'action d'un effort de compression. Les propriétés élastiques à la compression, de l' élastomère thermoplastique qui a subi la déformation rémanente sont normalement différentes de celles de l' élastomère avant la déformation. Les élastomères thermoplastiques sont bien connus en technique et sont généralement des élastomères de synthèse .The thermoplastic elastomer blocks have elastic properties and together form a spring between the base and the pad. By definition, an elastomer is a macromolecular material having elastic properties. A thermoplastic elastomer is an elastomer that retains elastic properties after having undergone permanent deformation by plastic creep under the action of a compressive force. The compressive elastic properties of the thermoplastic elastomer which has undergone the remanent deformation are normally different from those of the elastomer prior to deformation. Thermoplastic elastomers are well known in the art and are generally synthetic elastomers.

Moyennant les propriétés énoncées plus haut, l' élastomère thermoplastique des blocs n'est pas critique pour la définition de l'invention. On utilise avantageusement des polyesters thermoplastiques. Des exemples de polyesters thermoplastiques convenant pour l'invention appartiennent à la famille des copolymères d'esters de polyéthers . Des copolymères obtenus par transestérif ication d'un ester dérivé d'acide phtalique, d'un glycol à faible poids moléculaire et d'un polyéther glycol conviennent bien, notamment ceux commercialisés sous la marque HYTREL® (Du Pont) . Des informations concernant ces copolymères sont notamment accessibles dans le document Polymer Engineering and Science, décembre 1974, Vol. 14, n°12, pages 848 à 852, ainsi que dans le document Encyclopedia of polymer Science and Technology, Supl . Vol. II, Wiley & Son, New York, 1977, pages 484-509. Les élastomères connus sous la marque ARNITEL® (DSM) conviennent spécialement bien.With the properties mentioned above, the thermoplastic elastomer blocks is not critical for the definition of the invention. Thermoplastic polyesters are advantageously used. Examples of thermoplastic polyesters suitable for the invention belong to the family of copolymers of polyether esters. Copolymers obtained by transesterification of an ester derived from phthalic acid, a low molecular weight glycol and a polyether glycol are suitable, including those sold under the trademark HYTREL ® (Du Pont). Information concerning these copolymers is particularly accessible in the document Polymer Engineering and Science, December 1974, Vol. 14, No. 12, pages 848-852, as well as in the document Encyclopedia of Polymer Science and Technology, Supl. Flight. II, Wiley & Son, New York, 1977, pp. 484-509. The elastomers known under the trademark ARNITEL ® (DSM) are particularly well suited.

Dans l'appui selon l'invention, les deux blocs peuvent être réalisés dans le même élastomère thermoplastique ou dans des élastomères différents. On préfère qu'ils soient réalisés dans le même élastomère thermoplastiqueIn the support according to the invention, the two blocks can be made in the same thermoplastic elastomer or in different elastomers. It is preferred that they be made of the same thermoplastic elastomer

Chacun des blocs en élastomère thermoplastique équipant l'appui selon l'invention a subi un traitement mécanique approprié, comprenant une déformation par compression au delà de la limite élastique de 1' élastomère thermoplastique, la compression étant suivie d'une détente du bloc. Dans la suite du présent mémoire, le traitement mécanique qui vient d'être décrit sera désigné « traitement mécanique de compression/détente » et l'expression « axe de compression » désignera la direction de l'effort de compression mis en œuvre dans le traitement mécanique de compression/détente. A l'issue du traitement mécanique de compression/détente, le bloc en élastomère thermoplastique conserve une déformation rémanente, qui dépend de la grandeur de l'effort de compression et de l' élastomère thermoplastique sélectionné. Dans le traitement mécanique de compression/détente, l'effort de compression doit être supérieur à la limite élastique de l' élastomère thermoplastique, de manière que le bloc tubulaire conserve une déformation rémanente. La grandeur optimum de l'effort de compression va dépendre de la forme et des dimensions du bloc tubulaire, ainsi que de l' élastomère thermoplastique et des propriétés recherchées pour l'appui latéral élastique. Elle doit être déterminée dans chaque cas particulier par l'homme du métier. Des informations concernant le traitement mécanique de compression/détente sont accessibles dans les documents US-A-4 198 037, GB-A-2 180 618 et WOEach of the thermoplastic elastomer blocks equipping the support according to the invention has undergone a suitable mechanical treatment, comprising compression deformation beyond the elastic limit of the thermoplastic elastomer, the compression being followed by expansion of the block. In the remainder of this specification, the mechanical treatment which has just been described will be referred to as "mechanical compression / expansion treatment" and the expression "compression axis" will designate the direction of the compression force used in the treatment. mechanical compression / relaxation. At the end of the mechanical compression / expansion treatment, the thermoplastic elastomer block retains a remanent deformation, which depends on the size of the compression force and the selected thermoplastic elastomer. In the mechanical compression / expansion treatment, the compression force must be greater than the elastic limit of the thermoplastic elastomer, so that the tubular block retains a remanent deformation. The optimum size of the compressive force will depend on the shape and dimensions of the tubular block, as well as the thermoplastic elastomer and the desired properties for elastic lateral support. It must be determined in each particular case by the person skilled in the art. Information concerning the mechanical compression / expansion treatment can be found in the documents US-A-4 198 037, GB-A-2 180 618 and WO

98/46930. Bien que cela ne soit pas indispensable, le traitement mécanique de compression/détente peut être accompagné d'un traitement thermique approprié avant, pendant ou après avoir exercé l'effort de compression. Des informations concernant ce traitement thermique sont accessibles dans le document US-A-4 198 037. L'axe de compression défini plus haut est généralement rectiligne ; il est généralement confondu avec un axe de symétrie du bloc, qui, de préférence, est cylindrique.98/46930. Although this is not essential, the mechanical compression / expansion treatment can be accompanied by a suitable heat treatment before, during or after exercising the compression effort. Information concerning this heat treatment can be found in US-A-4 198 037. The compression axis defined above is generally rectilinear; it is generally confused with an axis of symmetry of the block, which is preferably cylindrical.

Selon l'invention, les blocs en élastomère thermoplastique sont tubulaires et ils sont emmanchés chacun sur un barreau sensiblement indéformable. L'un des blocs est emmanché sur un barreau solidaire de la base et l'autre bloc est emmanché sur un barreau solidaire du patin .According to the invention, the thermoplastic elastomer blocks are tubular and they are each fitted on a substantially indeformable bar. One of the blocks is fitted on a bar integral with the base and the other block is fitted on a bar integral with the pad.

La tôle interposée entre la base et le patin est normalement percée de deux ouvertures, qui sont traversées par les deux blocs. La tôle est habituellement une tôle en acier, bien qu'un autre matériau rigide puisse également convenir. Elle occupe normalement une position intermédiaire entre la base et le patin, de telle sorte que ses deux ouvertures soient traversées respectivement par les deux barreaux des deux blocs tubulaires .The sheet interposed between the base and the pad is normally pierced by two openings, which are crossed by the two blocks. The sheet is usually a steel sheet, although another rigid material may also be suitable. It normally occupies an intermediate position between the base and the pad, so that its two openings are crossed respectively by the two bars of the two tubular blocks.

Dans l'appui élastique selon l'invention, les deux blocs en élastomère thermoplastique constituent un ressort de compression entre la plaque et le patin, en coulissant le long des deux barreaux. La tôle et les barreaux coopèrent par ailleurs pour empêcher un déplacement latéral substantiel relatif du patin vis-à- vis de la base, pendant une utilisation normale de l'appui sur un véhicule ferroviaire. Dans une forme de réalisation préférée de l'appui selon l'invention, les blocs tubulaires ont la forme d'un soufflet, avec un col ou rétrécissement entre deux boudins annulaires successifs. Au niveau du col, le bloc enserre le barreau sur lequel il est emmanché et il est enserré dans l'ouverture de la tôle, qu'il traverse. Toutes autres choses égales par ailleurs, cette forme de réalisation de l'invention renforce la rigidité latérale de l'appui et réduit en conséquence le jeu latéral du patin par rapport à la base.In the elastic support according to the invention, the two thermoplastic elastomer blocks constitute a compression spring between the plate and the pad, sliding along the two bars. The plate and the bars also cooperate to prevent relative substantial lateral displacement of the pad vis-à-vis the base, during normal use of the support on a rail vehicle. In a preferred embodiment of the support according to the invention, the tubular blocks have the shape of a bellows, with a neck or narrowing between two successive ring rolls. At the neck, the block encloses the bar on which it is fitted and it is enclosed in the opening of the sheet, through which it passes. Other things being equal, this embodiment of the invention reinforces the lateral rigidity of the support and consequently reduces the lateral play of the pad with respect to the base.

Dans une autre forme de réalisation particulière de l'appui selon l'invention, le bloc qui est emmanché sur le barreau solidaire de la base est également emmanché sur un tenon solidaire du patin ; de manière similaire, le bloc qui est emmanché sur le barreau solidaire du patin est également emmanché sur un tenon solidaire de la base. Dans cette forme de réalisation de l'invention, les tenons sont situés dans le prolongement des barreaux, desquels ils sont suffisamment écartés pour permettre au patin et à la base d'être déplacé l'un vers l'autre pour comprimer les blocs tubulaires. La fixation des tenons à la base et au patin peut être obtenue par tout moyen adéquat, par exemple par soudage.In another particular embodiment of the support according to the invention, the block which is fitted on the bar integral with the base is also fitted on a tenon integral with the pad; similarly, the block which is fitted on the bar integral with the pad is also fitted on a tenon secured to the base. In this embodiment of the invention, the tenons are located in the extension of the bars, from which they are sufficiently spaced to allow the pad and the base to be moved towards each other to compress the tubular blocks. Fixing the tenons at the base and the pad can be obtained by any suitable means, for example by welding.

Dans une variante d'exécution recommandée de la forme de réalisation qui vient d'être décrite, les blocs en élastomère thermoplastique présentent un col à chaque extrémité et ces cols enserrent respectivement le barreau et le tenon sur lesquels ils sont emmanchés.In a preferred embodiment of the embodiment which has just been described, the thermoplastic elastomer blocks have a neck at each end and these collars respectively grip the bar and the pin on which they are fitted.

Cette forme de réalisation particulière de l'invention et sa variante d'exécution renforcent la tenue latérale de la base et du patin, en réduisant leurs déplacements latéraux relatifs. L'appui latéral élastique selon l'invention peut comprendre plus de deux blocs en élastomère thermoplastique. En variante, elle peut également comprendre plus d'une tôle indéformable entre la base et le patin.This particular embodiment of the invention and its alternative embodiment reinforce the lateral behavior of the base and the pad, reducing their relative lateral movements. The elastic lateral support according to the invention may comprise more than two thermoplastic elastomer blocks. Alternatively, it can also to understand more than one indeformable sheet between the base and the skate.

L' invention concerne également un procédé original pour la fabrication d'un appui latéral conforme à l'invention, selon lequel on met en œuvre un assemblage comprenant deux tubes en élastomère thermoplastique, pris en sandwich entre deux plaques métalliques et traversant deux ouvertures d'une tôle métallique interposée entre les deux plaques, l'un des tubes étant emmanché sur un barreau fixé transversalement à l'une des plaques et l'autre tube étant emmanché sur un autre barreau fixé à l'autre plaque, on rapproche les deux plaques pour comprimer les deux tubes au-delà de la limite élastique de l' élastomère de manière à leur conférer une déformation rémanente et on relâche ensuite l'effort de compression .The invention also relates to an original method for the manufacture of a lateral support according to the invention, according to which an assembly comprising two thermoplastic elastomer tubes, sandwiched between two metal plates and passing through two openings is used. a metal sheet interposed between the two plates, one of the tubes being fitted on a bar fixed transversely to one of the plates and the other tube being fitted on another bar fixed to the other plate, the two plates are brought together to compress the two tubes beyond the elastic limit of the elastomer so as to give them a remanent deformation and then release the compression force.

Dans le procédé selon l'invention, les tubes ont de préférence un profil extérieur cylindrique droit, dont la section transversale correspond sensiblement aux ouvertures de la tôle qu'ils traversent.In the method according to the invention, the tubes preferably have a straight cylindrical outer profile, the cross section substantially corresponds to the openings of the sheet through which they pass.

Pendant l'effort de compression, les tubes subissent une contraction dans la direction de l'effort de compression et une expansion latérale, de part et d'autre des ouvertures de la tôle. Ils adoptent ainsi la forme d'un soufflet comprenant deux boudins annulaires de part et d'autre d'un col enserré élastiquement dans l'ouverture correspondante de la tôle. Après avoir exercé l'effort de compression, on relâche celui-ci. Dans le procédé selon l'invention, les ouvertures pratiquées dans la tôle doivent par conséquent être calibrées pour permettre la formation du col précité pendant la compression et après la détente. Dans une forme de réalisation préférée du procédé selon l'invention, les plaques mises en œuvre possèdent chacune un tenon sur lequel s'emmanche un des tubes.During the compression force, the tubes undergo a contraction in the direction of the compressive force and a lateral expansion, on both sides of the openings of the sheet. They thus adopt the shape of a bellows comprising two annular flanges on either side of a collar clamped elastically in the corresponding opening of the sheet. After exerting the compression effort, release it. In the method according to the invention, the openings made in the sheet must therefore be calibrated to allow the formation of the aforementioned neck during compression and after expansion. In a preferred embodiment of the method according to the invention, the plates used each have a pin on which one of the tubes is enclosed.

L'appui latéral élastique selon l'invention est destiné à équiper des véhicules ferroviaires montés sur bogie .The elastic lateral support according to the invention is intended to equip bogie-mounted railway vehicles.

L' invention concerne dès lors également un véhicule ferroviaire comprenant une caisse articulée sur au moins un bogie et, entre le bogie et la caisse, deux appuis latéraux élastiques conformes à l'invention, qui sont disposés sensiblement symétriquement de part et d'autre de l'articulation de la caisse au dit bogie.The invention therefore also relates to a railway vehicle comprising a hinged body on at least one bogie and, between the bogie and the body, two elastic lateral supports according to the invention, which are disposed substantially symmetrically on either side of the articulation of the body to the said bogie.

La définition du véhicule ferroviaire et sa destination ne sont pas critiques pour la définition de l'invention. L'invention s'applique ainsi indifféremment aux voitures de chemin de fer pour le transport de voyageurs, aux wagons pour le transport de marchandises, aux engins de traction, ainsi qu'aux véhicules autotractés utilisés sur les voies de chemin de fer interurbaines ou pour les tramways urbains.The definition of the railway vehicle and its destination are not critical for the definition of the invention. The invention thus applies equally to railway cars for the transport of passengers, to wagons for the transport of goods, to traction machines, as well as to self-propelled vehicles used on interurban railways or for urban trams.

Dans le véhicule selon l'invention, les deux appuis latéraux sont disposés symétriquement de part et d'autre de l'articulation de la caisse du véhicule au bogie. On recommande que chaque appui soit positionné de telle sorte que les deux ouvertures de la tôle qui l'équipe soient sensiblement alignées parallèlement à l'axe longitudinal du véhicule.In the vehicle according to the invention, the two lateral supports are arranged symmetrically on either side of the articulation of the vehicle body to the bogie. It is recommended that each support be positioned in such a way that the two openings of the sheet which equips it are substantially aligned parallel to the longitudinal axis of the vehicle.

L'invention est spécialement recommandée pour les voitures destinées au transport de voyageurs et pour les wagons servant au transport de marchandises. Brève description des figuresThe invention is especially recommended for passenger cars and freight wagons. Brief description of the figures

Des particularités et détails de l'invention vont apparaître au cours de la description suivante des figures annexées, qui représentent quelques formes de réalisation particulières de l'invention.Features and details of the invention will become apparent from the following description of the accompanying figures, which show some particular embodiments of the invention.

La figure 1 est une vue frontale d'une partie d'un bogie équipé d'une paire d'appuis latéraux élastiques ;Figure 1 is a front view of a portion of a bogie equipped with a pair of resilient lateral supports;

La figure 2 montre, en plan, une partie d'un bogie équipé d'un appui latéral élastique ; La figure 3 est un schéma, en section transversale verticale, d'un appui latéral élastique antérieur à l'invention ; etFigure 2 shows, in plan, a portion of a bogie equipped with an elastic lateral support; Figure 3 is a diagram, in vertical cross section, of an elastic lateral support prior to the invention; and

La figure 4 est un schéma en section transversale verticale, d'une forme de réalisation préférée de l'appui latéral élastique selon l'invention.Figure 4 is a vertical cross-sectional diagram of a preferred embodiment of the resilient lateral support of the invention.

Les figures ne sont pas dessinées à l'échelle.The figures are not drawn to scale.

Généralement, les mêmes numéros de référence désignent les mêmes éléments.Generally, the same reference numbers designate the same elements.

Description détaillée de modes de réalisation particuliers A la figure 1, la notation de référence 1 désigne une traverse d'un bogie. La traverse 1 fait partie du châssis du bogie et porte, dans sa partie centrale, un élément d'articulation 2 du bogie au châssis 3 de la caisse d'un wagon de chemin de fer (non représenté) . Une paire d'appuis latéraux élastiques 4 sont interposés entre la traverse 1 et le châssis 3, symétriquement par rapport à l'axe vertical 5 de rotation de l'articulation 2.DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS In FIG. 1, the reference numeral 1 designates a cross-bar of a bogie. The cross member 1 is part of the bogie frame and carries, in its central part, a hinge element 2 of the bogie to the frame 3 of the body of a railway car (not shown). A pair of elastic lateral supports 4 are interposed between the crossbar 1 and the chassis 3, symmetrically with respect to the vertical axis 5 of rotation of the articulation 2.

Le bogie représenté à la figure 2 comprend un châssis 14 monté sur deux trains de roues 16 (une seule roue 16 étant représentée) . La traverse 1 (schématisée à la figure 1) fait partie intégrante du châssis 14 où elle est disposée parallèlement aux deux trains de roues 16, à mi-distance de ceux-ci. La figure 2 montre un appui latéral élastique 4 sur la traverse 1. Un second appui latéral élastique (non représenté) est situé sur la traverse 1, de telle sorte que l'articulation 2 soit sensiblement à mi-distance des deux appuis. La figure 3 montre à plus grande échelle un appui latéral élastique antérieur à l'invention. Celui-ci comprend une plaque de base 6 et un patin 7. La plaque de base 6 est destinée à être fixée à la traverse 1 du bogie, par exemple au moyen d'un assemblage par boulons et écrous . Elle forme le fond d'un cylindre vertical 8 de section carrée, rectangulaire ou circulaire. Le patin 7 constitue la partie supérieure d'un piston 9 monté à coulissement dans le cylindre 8, à l' encontre d'un ressort de compression 10. Le ressort a pour fonction de repousser le patin 7 contre le châssis 3 de la caisse du wagon (figure 1) , le patin étant profilé pour glisser sur ledit châssis 1 lorsque le bogie 14 pivote sur l'articulation 2 autour de l'axe vertical 5. Une butée centrale 12 de la base et un barreau central 13 du patin 7 limite le déplacement du piston 9 dans le cylindre 8.The bogie represented in FIG. 2 comprises a chassis 14 mounted on two sets of wheels 16 (only one wheel 16 being shown). The cross member 1 (shown schematically in Figure 1) is an integral part of the frame 14 where it is arranged parallel to the two sets of wheels 16, halfway therefrom. Figure 2 shows an elastic lateral support 4 on the crossbar 1. A second elastic lateral support (not shown) is located on the crossbar 1, so that the joint 2 is substantially halfway between the two supports. Figure 3 shows on a larger scale elastic lateral support prior to the invention. This comprises a base plate 6 and a shoe 7. The base plate 6 is intended to be fixed to the crossbar 1 of the bogie, for example by means of an assembly by bolts and nuts. It forms the bottom of a vertical cylinder 8 of square, rectangular or circular section. The shoe 7 constitutes the upper part of a piston 9 slidably mounted in the cylinder 8, against a compression spring 10. The function of the spring is to push the shoe 7 against the frame 3 of the body of the wagon (Figure 1), the shoe being profiled to slide on said frame 1 when the bogie 14 pivots on the hinge 2 about the vertical axis 5. A central stop 12 of the base and a central bar 13 of the pad 7 limit the displacement of the piston 9 in the cylinder 8.

Lorsqu'un wagon circule sur une voie de chemin de fer, le bogie 14 subit des rotations sur son pivot 2, autour de l'axe 5. Simultanément le piston 9 subit des déplacements alternatifs verticaux dans le sens de la flèche Z dans le cylindre 8, sous l'effet des mouvements de roulis de la caisse. Sous l'effet des rotations du bogie 14 sur le pivot 2, autour de l'axe vertical 5, le piston 9 est en outre soumis à des déplacements alternatifs dans le sens des flèches X, limités par le jeu entre le cylindre 8 etle piston 9. La combinaison de l'ensemble de ces déplacements du piston 9 engendre une usure progressive du piston 9 et des parois du cylindre 8, accentuant le jeu entre ces deux éléments de l'appui, qui devient rapidement inopérant et doit être remplacé.When a wagon runs on a railway track, the bogie 14 is rotated on its pivot 2, about the axis 5. Simultaneously the piston 9 undergoes vertical reciprocating movements in the direction of the arrow Z in the cylinder 8, under the effect of roll movements of the body. Under the effect of the rotations of the bogie 14 on the pivot 2, around the vertical axis 5, the piston 9 is further subjected to reciprocating movements in the direction of the arrows X, limited by the clearance between the cylinder 8 and the piston 9. The combination of all these displacements of the piston 9 generates a progressive wear of the piston 9 and the cylinder walls 8, accentuating the clearance between these two elements of the support, which quickly becomes inoperative and must be replaced.

L'appui latéral élastique représenté à la figure 4 est conforme à l'invention. Dans cet appui, un barreau 13 est fixé verticalement au patin 7 et un barreau similaire 17 est fixé verticalement à la base 6. Un tenon 12 est fixé à la base 6 à l'aplomb du barreau 13 et un tenon similaire 18 est fixé au patin 7, en regard du barreau 17. Un bloc tubulaire 19 est emmanché sur le barreau 13 du patin 7 et sur le tenon 12 de la base 6. De manière similaire, un bloc tubulaire 20 est emmanché sur le barreau 17 de la base 6 et sur le tenon 18 du patin 7. Les deux blocs tubulaires 19 et 20 traversent par ailleurs deux ouvertures circulaires 26 et 27 d'une tôle métallique 21, située à mi-distance du patin 7 et de la base 6. Les barreaux 13 et 17 ont une longueur suffisante pour traverser les ouvertures 26 et 27.The elastic lateral support shown in FIG. 4 is in accordance with the invention. In this support, a bar 13 is fixed vertically to the pad 7 and a similar bar 17 is fixed vertically to the base 6. A pin 12 is fixed to the base 6 in line with the bar 13 and a similar pin 18 is fixed to 7, facing the bar 17. A tubular block 19 is fitted on the bar 13 of the pad 7 and on the pin 12 of the base 6. Similarly, a tubular block 20 is fitted on the bar 17 of the base 6 and on the pin 18 of the pad 7. The two tubular blocks 19 and 20 also pass through two circular openings 26 and 27 of a metal sheet 21, situated half way between the pad 7 and the base 6. The bars 13 and 17 have a sufficient length to pass through the openings 26 and 27.

Les blocs tubulaires 19 et 20 sont en élastomère thermoplastique et présentent l'aspect d'un soufflet avec deux boudins annulaires 22 séparés par un col circulaire 23 et terminés par deux cols d'extrémités 24 et 25. Le col 23 et le col 24 du bloc tubulaire 19 enserrent élastiquement le barreau 13 et son col 25 enserre élastiquement le tenon 12 de la base 6. De manière similaire, le col 23 et le col 25 du bloc tubulaire 20 enserrent élastiquement le barreau 17 et son col 24 enserre élastiquement le tenon 18 du patin 7. Par ailleurs, le col 23 du bloc 19 est enserré élastiquement dans l'ouverture 26 de la tôle 21 et le col 23 du bloc 20 est enserré élastiquement dans l'ouverture 27 de la tôle 21. Les blocs tubulaires 19 et 20 ont été obtenus en soumettant deux tubes cylindriques droits à un traitement mécanique de compression/détente comprenant une compression du tube cylindrique au-delà de la limite de déformation élastique de l'élastomère et une détente. A l'issue du traitement mécanique de compression/détente, les tubes cylindriques conserve une déformation rémanente leur donnant l'aspect schématisé à la figure 4 et explicité plus haut.The tubular blocks 19 and 20 are made of thermoplastic elastomer and have the appearance of a bellows with two annular flanges 22 separated by a circular neck 23 and terminated by two end necks 24 and 25. The neck 23 and the neck 24 of the tubular block 19 resiliently grip the bar 13 and its neck 25 elastically grips the tenon 12 of the base 6. Similarly, the neck 23 and the neck 25 of the tubular block 20 elastically grip the bar 17 and its neck 24 elastically grips the tenon 18 of the skate 7. By elsewhere, the neck 23 of the block 19 is gripped elastically in the opening 26 of the sheet 21 and the neck 23 of the block 20 is gripped elastically in the opening 27 of the sheet 21. The tubular blocks 19 and 20 were obtained in subjecting two straight cylindrical tubes to a mechanical compression / expansion treatment comprising compression of the cylindrical tube beyond the elastic deformation limit of the elastomer and expansion. At the end of the mechanical compression / expansion treatment, the cylindrical tubes retain a remanent deformation giving them the appearance shown schematically in Figure 4 and explained above.

D'une manière plus précise, pour fabriquer l'appui latéral élastique de la figure 4 , on a mis en œuvre deux tubes cylindriques droits en élastomère thermoplastique. On a emmanché un des tubes sur le tenon 12 de la base 6 et l'autre tube sur le barreau 17 de celle-ci. Ensuite, on a disposé la tôle 21 en engageant les deux tubes dans ses deux ouvertures circulaires 26 et 27. Puis, on a positionné le patin 7 parallèlement à la base 6 et à la tôle 21, en engageant le barreau 13 et le tenon 18 respectivement dans les deux tubes cylindriques en élastomères thermoplastique. Par la suite, l'assemblage ainsi constitué a été introduit dans une presse, dans laquelle on a déplacé la base 6 vers le patin 7 pour comprimer les tubes cylindriques axialement au-delà de la limite de déformation élastique de l'élastomère thermoplastique et on a ensuite relâché la compression. A l'issue du traitement mécanique de compression/détente ainsi réalisé, les deux tubes ont adopté le profil en soufflet visible à la figure 4. Ils constituent deux ressorts de compression.More precisely, to manufacture the elastic lateral support of FIG. 4, two straight cylindrical tubes made of thermoplastic elastomer have been used. One of the tubes was fitted on the post 12 of the base 6 and the other tube on the bar 17 of the latter. Then, the sheet 21 was placed by engaging the two tubes in its two circular openings 26 and 27. Then, the pad 7 was positioned parallel to the base 6 and the plate 21, engaging the bar 13 and the pin 18 respectively in the two cylindrical tubes of thermoplastic elastomers. Subsequently, the assembly thus formed was introduced into a press, in which the base 6 was moved towards the pad 7 to compress the cylindrical tubes axially beyond the limit of elastic deformation of the thermoplastic elastomer and then released the compression. At the end of the mechanical compression / expansion treatment thus produced, the two tubes adopted the profile in bellows visible in Figure 4. They constitute two compression springs.

Pendant une utilisation normale de l'appui de la figure 4 sur un véhicule ferroviaire, la base 6 est fixée sur une traverse d'un bogie du véhicule et les ressorts 19 et 20 sont comprimés en deçà de la limite élastique de 1 ' élastomère, de manière à repousser le patin 7 contre le fond de la caisse du véhicule. Les déplacements du patin dans le sens des flèches X sont contrecarrés par la tôle 21 et les barreaux 13 et 17. During normal use of the support of Figure 4 on a railway vehicle, the base 6 is fixed on a crossbar of a bogie of the vehicle and the springs 19 and 20 are compressed within the elastic limit of one elastomer, so as to push the pad 7 against the bottom of the vehicle body. The movements of the pad in the direction of the arrows X are counteracted by the plate 21 and the bars 13 and 17.

Claims

REVENDICATIONS 1. Appui latéral élastique pour véhicule ferroviaire, comprenant, entre une base (6) conçue pour être solidarisée à un bogie (14) du véhicule et un patin (7) destiné à prendre appui contre la caisse (3) du véhicule, un bloc en élastomëre thermoplastique ayant subi successivement une déformation par compression au- delà de la limite élastique de l'élastomère et une détente, caractérisé en ce que le bloc (19) est emmanché sur un barreau sensiblement indéformable (13) , solidaire de la base (6) , en ce qu'au moins un second bloc en élastomère thermoplastique (20) est emmanché sur un second barreau sensiblement indéformable (17) , solidaire du patin (7) et en ce que les deux blocs (19, 20) traversent une tôle sensiblement indéformable (21) , interposée entre la base et le patin.1. Lateral elastic support for a railway vehicle, comprising, between a base (6) designed to be secured to a bogie (14) of the vehicle and a pad (7) intended to bear against the body (3) of the vehicle, a block thermoplastic elastomer having successively undergone compression deformation beyond the elastic limit of the elastomer and an expansion, characterized in that the block (19) is fitted on a substantially indeformable bar (13) integral with the base ( 6), in that at least a second block of thermoplastic elastomer (20) is fitted on a second substantially indeformable bar (17), integral with the pad (7) and in that the two blocks (19, 20) pass through a substantially indeformable sheet (21) interposed between the base and the pad. 2. Appui selon la revendication 1, caractérisé en ce que chaque bloc (19, 20) présente un col (23) entre deux boudins annulaires successifs (22) , qui enserre le barreau (13, 17) sur lequel ledit bloc est emmanché et qui est enserré dans une ouverture correspondante (26, 27) de la tôle (21) .2. Support according to claim 1, characterized in that each block (19, 20) has a neck (23) between two successive annular flanges (22), which encloses the bar (13, 17) on which said block is fitted and which is enclosed in a corresponding opening (26, 27) of the sheet (21). 3. Appui selon la revendication 1 ou 2 , caractérisé en ce que les bloc (19, 20) sont emmanchés respectivement sur deux tenons solidaires respectivement du patin (7) et de la base (6) .3. Support according to claim 1 or 2, characterized in that the blocks (19, 20) are fitted respectively on two integral tenons respectively of the shoe (7) and the base (6). 4. Appui selon la revendication 3, caractérisé en ce que chaque bloc (19, 20) présente un col (24, 25) à chaque extrémité et en ce que ces cols d'extrémité enserrent respectivement le barreau (13, 17) et le tenon (12, 18) sur lesquels ledit bloc est emmanché. 4. Support according to claim 3, characterized in that each block (19, 20) has a neck (24, 25) at each end and in that these end collars respectively grip the bar (13, 17) and the tenon (12, 18) on which said block is fitted. 5. Procédé pour la fabrication d'un appui latéral élastique conforme à l'une quelconque des revendications 1 à 4, selon lequel on met en œuvre un assemblage comprenant deux tubes (19, 20) en élastomère thermoplastique, pris en sandwich entre deux plaques métalliques (6, 7) et traversant deux ouvertures (26, 27) d'une tôle métallique (21) interposée entre les deux plaques, l'un des tubes (19) étant emmanché sur un barreau (13) fixé transversalement à l'une des plaques (7) et l'autre tube (20) étant emmanché sur un autre barreau (17) fixé à l'autre plaque (6) , on rapproche les deux plaques pour comprimer les deux tubes au-delà de la limite élastique de l' élastomère de manière à leur conférer une déformation rémanente et on relâche ensuite l'effort de compression.5. A method for producing an elastic lateral support according to any one of claims 1 to 4, wherein an assembly comprising two tubes (19, 20) made of thermoplastic elastomer sandwiched between two plates is used. metal (6, 7) and through two openings (26, 27) of a metal sheet (21) interposed between the two plates, one of the tubes (19) being fitted on a bar (13) fixed transversely to the one of the plates (7) and the other tube (20) being fitted on another bar (17) fixed to the other plate (6), the two plates are brought together to compress the two tubes beyond the elastic limit of the elastomer so as to give them a remanent deformation and the compression force is then released. 6. Procédé selon la revendication 5, caractérisé en ce que les tubes (19, 20) sont en outre emmanchés sur des tenons (12, 18) solidaires des plaques (6, 7) .6. Method according to claim 5, characterized in that the tubes (19, 20) are further fitted on lugs (12, 18) secured to the plates (6, 7). 7. Véhicule ferroviaire, comprenant une caisse (3) articulée sur au moins un bogie (14) et, entre le bogie et la caisse, deux appuis latéraux élastiques (4) qui sont disposés sensiblement symétriquement de part et d'autre de l'articulation (2) de la caisse au bogie, caractérisé en ce que les appuis latéraux élastiques (4) sont conformes à l'une quelconque des revendications 1 à 4.7. Railway vehicle, comprising a body (3) articulated on at least one bogie (14) and, between the bogie and the body, two elastic lateral supports (4) which are disposed substantially symmetrically on either side of the articulation (2) of the bogie body, characterized in that the elastic lateral supports (4) are in accordance with any one of claims 1 to 4. 8. Véhicule selon la revendication 7, caractérisé en ce que les deux appuis latéraux (4) sont disposés de telle sorte que les ouvertures (26, 27) de leur tôle (21) soient sensiblement alignées parallèlement à l'axe longitudinal du véhicule. 8. Vehicle according to claim 7, characterized in that the two lateral supports (4) are arranged such that the openings (26, 27) of their plate (21) are substantially aligned parallel to the longitudinal axis of the vehicle. 9. Véhicule selon la revendication 8, caractérisé en ce qu'il est une voiture pour voyageurs.9. Vehicle according to claim 8, characterized in that it is a passenger car. 10. Véhicule selon la revendication 8, caractérisé en ce qu'il est un wagon pour le transport de marchandises. 10. Vehicle according to claim 8, characterized in that it is a wagon for the transport of goods.
PCT/BE2010/000030 2009-04-07 2010-04-06 Elastic lateral bearing for a railway vehicle, method of manufacturing such a bearing and railway vehicle Ceased WO2010115248A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2009/0216A BE1018710A3 (en) 2009-04-07 2009-04-07 ELASTIC SIDE SUPPORT FOR A RAILWAY VEHICLE, METHOD OF MANUFACTURING THE SAME, AND RAILWAY VEHICLE
BE2009/0216 2009-04-07

Publications (1)

Publication Number Publication Date
WO2010115248A1 true WO2010115248A1 (en) 2010-10-14

Family

ID=41259505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/BE2010/000030 Ceased WO2010115248A1 (en) 2009-04-07 2010-04-06 Elastic lateral bearing for a railway vehicle, method of manufacturing such a bearing and railway vehicle

Country Status (2)

Country Link
BE (1) BE1018710A3 (en)
WO (1) WO2010115248A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198037A (en) 1976-12-28 1980-04-15 Miner Enterprises, Inc. Method of making polyester elastomer compression spring and resulting product
GB2180618A (en) 1982-08-27 1987-04-01 Miner Enterprises Hollow elastomeric bodies
US4712487A (en) 1985-05-28 1987-12-15 Miner Enterprises, Inc. Side bearing unit for railroad car, including method of making
WO1998046930A1 (en) 1997-04-11 1998-10-22 Miner Enterprises, Inc. Composite elastomeric spring
US6141853A (en) * 1998-12-03 2000-11-07 Miner Enterprises, Inc. Method of manufacturing and energy absorption apparatus for a railroad car
US20060042498A1 (en) * 2004-08-25 2006-03-02 Schorr Ralph H Side bearing for railway car

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4198037A (en) 1976-12-28 1980-04-15 Miner Enterprises, Inc. Method of making polyester elastomer compression spring and resulting product
GB2180618A (en) 1982-08-27 1987-04-01 Miner Enterprises Hollow elastomeric bodies
US4712487A (en) 1985-05-28 1987-12-15 Miner Enterprises, Inc. Side bearing unit for railroad car, including method of making
WO1998046930A1 (en) 1997-04-11 1998-10-22 Miner Enterprises, Inc. Composite elastomeric spring
US6141853A (en) * 1998-12-03 2000-11-07 Miner Enterprises, Inc. Method of manufacturing and energy absorption apparatus for a railroad car
US20060042498A1 (en) * 2004-08-25 2006-03-02 Schorr Ralph H Side bearing for railway car

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
POLYMER ENGINEERING AND SCIENCE, vol. 14, no. 12, December 1974 (1974-12-01), pages 848 - 852

Also Published As

Publication number Publication date
BE1018710A3 (en) 2011-07-05

Similar Documents

Publication Publication Date Title
EP2676859B1 (en) Bogie for railway vehicle with improved suspension, in particular for a low floor tramway
EP0584202B1 (en) Rail vehicle bogie with selectively deformable chassis
EP0667271A1 (en) Articulated coupling and method for energy absorption between two railway vehicles
EP2455269B1 (en) Rail vehicle bogie including an eddy-current braking device
CH618505A5 (en)
FR3029879A1 (en) MOTORIZED BOGIE FOR A SURBAISSE FLOOR VEHICLE
FR2644743A1 (en) BOGIE WITH DEFORMABLE CHASSIS
FR2557032A1 (en) ELASTIC WHEEL FOR VEHICLE ON TRACKS
EP3222485B1 (en) Railway vehicle bogie comprising an offset primary suspension device
BE1018710A3 (en) ELASTIC SIDE SUPPORT FOR A RAILWAY VEHICLE, METHOD OF MANUFACTURING THE SAME, AND RAILWAY VEHICLE
EP4331867B1 (en) Deformable wheel with non-pneumatic load support for conditions on the moon and mars
FR2497167A1 (en) TRANSVERSE AND VERTICAL COMBINED SUSPENSION SYSTEM FOR RAILWAY VEHICLE
EP0035443B1 (en) Chassis suspension on at least two axles of a railway vehicle, and chassis provided with this suspension
FR2759659A1 (en) RAIL VEHICLE WITH A HEAD CAPABLE OF DEFORMING IN A CONTROLLED WAY, WHEN IT IS SUBJECT TO IMPORTANT SHOCK REQUIREMENTS
BE1018231A5 (en) COMPRESSION SPRING, SHOCK ABSORBER FOR AUTOMATIC COUPLING DEVICE OF VEHICLES AND VEHICLE EQUIPPED WITH SUCH SHOCK ABSORBER.
EP3741642B1 (en) Bolster for iberian reversible bogie/uic with integrated braking device
EP0048193A1 (en) Suspension device for railway vehicles
CH631122A5 (en) VEHICLE SUSPENSION.
FR2894184A1 (en) DEVICE FORMING A STOP TO RELIEVE A SUSPENSION OF A VEHICLE, IN PARTICULAR A MOTOR VEHICLE
FR2526741A1 (en) REINFORCED BUGGY AND BOGGY STABILIZATION ASSEMBLY AND METHOD
CH619653A5 (en) Vehicle suspension
BE1006167A3 (en) Hanging rail conveyor assembly
FR3067046A1 (en) RAIL DISMOUNTABLE AND INTERCHANGEABLE AGAINST RAINFALL SOUND NUISANCES.
CH615255A5 (en) Elastic pivot with selective flexibility
FR2564926A1 (en) Elastomer component in railway carriage suspension

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 10727334

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 10727334

Country of ref document: EP

Kind code of ref document: A1