WO2018020152A1 - Adapter and rim for a rolling assembly, assembly formed by the adapter and the rim, and rolling assembly comprising same - Google Patents

Adapter and rim for a rolling assembly, assembly formed by the adapter and the rim, and rolling assembly comprising same Download PDF

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Publication number
WO2018020152A1
WO2018020152A1 PCT/FR2017/052080 FR2017052080W WO2018020152A1 WO 2018020152 A1 WO2018020152 A1 WO 2018020152A1 FR 2017052080 W FR2017052080 W FR 2017052080W WO 2018020152 A1 WO2018020152 A1 WO 2018020152A1
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WO
WIPO (PCT)
Prior art keywords
rim
axially
stent
tire
assembly
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PCT/FR2017/052080
Other languages
French (fr)
Inventor
Luc Bestgen
Michel Ahouanto
Original Assignee
Compagnie Generale Des Etablissements Michelin
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Application filed by Compagnie Generale Des Etablissements Michelin filed Critical Compagnie Generale Des Etablissements Michelin
Publication of WO2018020152A1 publication Critical patent/WO2018020152A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
    • B60B25/22—Other apurtenances, e.g. for sealing the component parts enabling the use of tubeless tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/02—Seating or securing beads on rims
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/02—Seating or securing beads on rims
    • B60C15/0209—Supplementary means for securing the bead
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/02—Seating or securing beads on rims
    • B60C15/0209—Supplementary means for securing the bead
    • B60C15/0223—Supplementary means for securing the bead the bead being secured by clip-hook elements not forming part of the rim flange

Definitions

  • the invention relates to a stent and a rim for a rolling assembly for equipping a land vehicle, especially a passenger vehicle.
  • a tire, a rim, and a stent referred to in the present invention are usually described by a representation in a meridian plane, that is to say a plane containing the axis of rotation of the tire. .
  • All these products are objects having a geometry of revolution with respect to their axis of rotation.
  • the radial and axial directions respectively designate the directions, the first, perpendicular to the axis of rotation of the tire, and the second, parallel to the axis of rotation of the tire.
  • the expressions "radially” and “axially” respectively mean “in a radial direction” and "in the axial direction”.
  • a median plane CP is a plane perpendicular to the axis of rotation of the tire, positioned axially so as to cut the surface of the tread substantially halfway between the beads of a tire.
  • the terms “axially inner, respectively axially outer” mean “closer or more distant respectively, the median plane of the tire in the axial direction.”
  • the terms “radially inner or radially outer” mean “closer or farther away from the axis of rotation in the radial direction”.
  • a tire comprises a tread intended to come into contact with a ground, two sidewalls extending radially inwards the axial ends of the tread and two beads extending radially inwards. two flanks and intended to come into contact with a rim.
  • WO2016 / 046197 it is proposed to insert an elastic expander between a tire bead and a rim, said rim being further adapted to receive the beads of a tire on seats whose contact surface with the bead is oriented radially outwardly.
  • the reader will refer for example to Figure 5 of this document to become acquainted with a rolling assembly belonging to the field of the invention. It shows a rolling assembly comprising a tire, a rim and two identical stents.
  • such an expander comprises, axially from the inside to the outside, an axially inner end called a bead of expander and intended to ensure the attachment of the expander on the rim.
  • a stent also includes an axially outer end for receiving a tire bead.
  • a body connects the two ends respectively axially inner and axially outer.
  • a rolling assembly equipped with two expanders as described in the aforementioned document, provides the main functions of a conventional roller assembly, in which the tire is mounted directly on its recommended rim, and also provides better performance endurance in use on degraded roads.
  • the increase of one inch of the diameter to the seat generally leads to greater intrusiveness of the wheel assembly, or conversely, the fact of having to resort to a rim of smaller diameter leaves less room to house the seats. brakes in the wheel.
  • the objective of the present invention is to provide an evolution of a tire assembly comprising a tire whose beads comply with current standards, also comprising a rim and two expanders, the whole being of better compactness.
  • the invention therefore relates to a flexible expander for rolling assembly, said assembly comprising a tire having two beads, a rim and two expander each intended to provide the junction between one of the beads and the rim, said rim having two radially outwardly oriented rim seats, said stent forming a piece of revolution in the unconstrained state, said stent including an axially inner end having a radially inwardly radially inwardly facing face for mounting on one of said rim seats, said axially inner end having a diameter D3 and being intended to be immobilized axially against the adjacent rim flange, said stent comprising an axially outer end and a body oriented principally axially and disposed between said end axially outer and said axially in wherein said stent having a radially outwardly extending stent seat of diameter D1 and adapted to receive a tire bead, characterized in that said radially inner face is a substantially frustoconical surface of an
  • the invention also extends to a wheel assembly rim, said wheel assembly comprising a tire having two beads, a rim and two expander each intended to provide the junction between one of the beads and the rim, said rim having two radially outwardly oriented rim seats, each rim seat being extended axially outwardly by a rim flange, said rim having a width W, characterized in that each rim seat is a substantially frustoconical surface of An angle greater than 10 °, the width W of the rim is less than 9 "and each rim seat is extended axially inwardly by a boss intended to thwart the axial displacement towards the inside of the stent.
  • the invention also extends to an assembly comprising a rim as indicated above and two stents as indicated above.
  • Figure 1 partially shows a rim 3 having two seats on the rim 31 oriented radially outwardly, of diameter D3; the seats on the rim 31 are oriented radially outwards; each seat on rim 31 is extended axially outwardly by a rim flange 32 and is extended axially inwardly by a boss 33 commonly referred to as "hump", the function of which is to thwart the axial movement inwards of the expander 3, like the humps de rims for "tubeless" mounting of the tires, the function of which is to prevent loosening of the tire bead.
  • a boss 33 commonly referred to as "hump"
  • each seat on rim 31 is a substantially frustoconical surface of angle ⁇ (with respect to the axis of rotation) of 15 °, more generally greater than 10 ° so as to ensure sufficient clamping of the expander on the rim 3.
  • said angle a is inclined such that, if the the right defined by each seat on the rim 31 is extended on a meridian section, said straight line intersects the axis of rotation of said rim axially on the side opposite to the rim flange 32.
  • the seats on the rim 31 are oriented axially towards the rim 31 inside. Therefore, preferably, said rim seats are both oriented radially outwardly and axially inwardly.
  • a radial section of a stent 1 has an axially inner end 10 to be mounted on one of said seats on the rim. It comprises an axially outer end 11 and body 12 oriented substantially axially and disposed between said axially outer end 11 and said axially inner end 10.
  • the body 12 is formed by an elastomeric material reinforced by a layer of reinforcing elements. These reinforcements may be fibers, metal cables, textile cables.
  • Said axially inner end 10 has a substantially frustoconical radially inwardly facing surface 101, radially outwardly oriented, whose angle a is equal to 15 °, more generally greater than 10 ° in order to ensure sufficient clamping of the expander 1 on the rim 3.
  • the expander has a seat on extender 13 oriented radially outwardly; in addition, said seat on the stent is also oriented axially inwards.
  • This invention differs from that proposed in WO2016 / 046197 in that the seat diameter on the rim is the same as the bead seat of the tire. This leads to an attachment zone on the rim of the "wedged seat” type extender (angle of the frustoconical surface of seat on rim of 15 ° instead of 5 ° of usual rims).
  • the rim flange 32 is of very small radial height to allow the mountability of the stent.
  • the expander is easily “removable” because retained only “stuck” due to the inflation pressure of the tire (and not immobilized under clamping force as a standard tire for passenger vehicle).
  • the diameter D3 of said axially inner end 10 is also the diameter of the seat on the rim 31 and is measured at the intersection of the frustoconical surface of the seat on the rim and the axially inner face of the rim flange, as taught by the standards of the rim. ETRTO.
  • the diameter D1 of the seat on the stent 13 is also the diameter of the tire bead, and is measured at the intersection of the frustoconical surface of the seat on the stent and the axially inner face of the axially outer end 11 of the stent, that is to say, as one would measure the diameter of an equivalent rim on which a tire without a stent would be mounted directly, which makes it possible to refer the reader to the standards of the ETRTO.
  • the industrial objective is to fully respect tire manufacturing standards, and to comply as much as possible with existing rim manufacturing rules.
  • the invention extends to a rim W width less than 9 ", a fairly narrow rim even for applications to passenger vehicles.
  • the mounting of the expander 1 on the rim 3 proves simpler while improving its grip on

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

A flexible adapter (1) for a rolling assembly, said rolling assembly including a tyre (2), a rim (3) and two adapters (1) each intended to join one of the beads (21) with the rim (3), the adapter comprising an axially inner end (10) having a radially inner face (101) intended to be mounted on one of said rim seats (31), of diameter D3, the axially inner end (10) having a diameter D1, wherein the radially inner face (101) is a substantially frustoconical surface of angle α greater than 10° and the diameters D1 and D3 are identical.

Description

EXTENSEUR ET JANTE POUR ENSEMBLE ROULANT, ENSEMBLE FORME PAR L'EXTENSEUR ET LA JANTE, ET ENSEMBLE ROULANT LES COMPRENANT  EXTENSIONER AND RIM FOR A ROLLING ASSEMBLY, ASSEMBLY FORMED BY THE EXTENSION DEVICE AND RIM, AND ROLLING ASSEMBLY COMPRISING THEM
Domaine de l'invention Field of the invention
[0001] L'invention a pour objet un extenseur et une jante pour un ensemble roulant destiné à équiper un véhicule terrestre, en particulier un véhicule de tourisme. The invention relates to a stent and a rim for a rolling assembly for equipping a land vehicle, especially a passenger vehicle.
[0002] Un pneumatique, une jante, ainsi qu'un extenseur dont il est question dans la présente invention sont usuellement décrits par une représentation dans un plan méridien, c'est-à-dire un plan contenant l'axe de rotation du pneumatique. Tous ces produits (un pneumatique, une jante, un extenseur) sont des objets ayant une géométrie de révolution par rapport à leur axe de rotation. Les directions radiale et axiale désignent respectivement les directions, la première, perpendiculaire à l'axe de rotation du pneumatique, et la seconde, parallèle à l'axe de rotation du pneumatique. Dans ce qui suit, les expressions « radialement », et « axialement » signifient respectivement « selon une direction radiale », et « selon la direction axiale ». Les expressions « radialement intérieur, respectivement radialement extérieur » signifient « plus proche, respectivement plus éloigné, de l'axe de rotation du pneumatique, selon une direction radiale ». Un plan médian CP est un plan perpendiculaire à l'axe de rotation du pneumatique, positionné axialement de façon à couper la surface de la bande de roulement sensiblement à mi-distance des bourrelets d'un pneumatique. Les expressions « axialement intérieur, respectivement axialement extérieur » signifient « plus proche, respectivement plus éloigné, du plan médian du pneumatique, selon la direction axiale ». Les expressions « radialement intérieur, respectivement radialement extérieur » signifient « plus proche, respectivement plus éloigné, de l'axe de rotation, selon la direction radiale ». Enfin, rappelons encore que, par « coupe radiale » ou « section radiale », on entend une coupe ou une section selon un plan qui contient l'axe de rotation de la jante (et du pneumatique dont celle-ci est équipée).  A tire, a rim, and a stent referred to in the present invention are usually described by a representation in a meridian plane, that is to say a plane containing the axis of rotation of the tire. . All these products (a tire, a rim, a stent) are objects having a geometry of revolution with respect to their axis of rotation. The radial and axial directions respectively designate the directions, the first, perpendicular to the axis of rotation of the tire, and the second, parallel to the axis of rotation of the tire. In what follows, the expressions "radially" and "axially" respectively mean "in a radial direction" and "in the axial direction". The terms "radially inner or radially outer" mean "closer or farther away from the axis of rotation of the tire in a radial direction". A median plane CP is a plane perpendicular to the axis of rotation of the tire, positioned axially so as to cut the surface of the tread substantially halfway between the beads of a tire. The terms "axially inner, respectively axially outer" mean "closer or more distant respectively, the median plane of the tire in the axial direction." The terms "radially inner or radially outer" mean "closer or farther away from the axis of rotation in the radial direction". Finally, remember again that "radial section" or "radial section" means a section or section in a plane that contains the axis of rotation of the rim (and the tire of which it is equipped).
État de la technique State of the art
[0003] De façon générale, un pneumatique comprend une bande de roulement, destinée à entrer en contact avec un sol, deux flancs prolongeant radialement vers l'intérieur les extrémités axiales de la bande de roulement et deux bourrelets prolongeant radialement vers l'intérieur les deux flancs et destinés à entrer en contact avec une jante. [0004] Dans le document WO2016/046197, il est proposé d'insérer un extenseur élastique entre un bourrelet de pneumatique et une jante, ladite jante étant par ailleurs conçue pour recevoir les bourrelets d'un pneumatique sur des sièges dont la surface de contact avec le bourrelet est orientée radialement vers l'extérieur. Le lecteur se reportera par exemple à la figure 5 de ce document pour prendre connaissance d'un ensemble roulant appartenant au domaine de l'invention. On y voit un ensemble roulant comprenant un pneumatique, une jante et deux extenseurs identiques. En considérant les conventions de langage rappelées ci-dessus, et en se reportant à la façon dont on monte sur une jante un tel extenseur, un tel extenseur comprend, axialement de l'intérieur vers l'extérieur, une extrémité axialement intérieure appelée bourrelet d'extenseur et destinée à assurer l'accrochage de l'extenseur sur la jante. Un tel extenseur comprend aussi une extrémité axialement extérieure destinée à recevoir un bourrelet de pneumatique. Un corps relie les deux extrémités respectivement axialement intérieure et axialement extérieure. In general, a tire comprises a tread intended to come into contact with a ground, two sidewalls extending radially inwards the axial ends of the tread and two beads extending radially inwards. two flanks and intended to come into contact with a rim. In WO2016 / 046197, it is proposed to insert an elastic expander between a tire bead and a rim, said rim being further adapted to receive the beads of a tire on seats whose contact surface with the bead is oriented radially outwardly. The reader will refer for example to Figure 5 of this document to become acquainted with a rolling assembly belonging to the field of the invention. It shows a rolling assembly comprising a tire, a rim and two identical stents. In considering the language conventions recalled above, and referring to the manner in which such a stent is mounted on a rim, such an expander comprises, axially from the inside to the outside, an axially inner end called a bead of expander and intended to ensure the attachment of the expander on the rim. Such a stent also includes an axially outer end for receiving a tire bead. A body connects the two ends respectively axially inner and axially outer.
[0005] Lorsque l'on désire utiliser un extenseur élastique afin d'augmenter la capacité d'un ensemble roulant de franchir sans dommage et/ou avec un confort de roulement très augmenté des nids de poule de profondeur importante, pour un pneumatique de diamètre et de largeur donnés (mesuré selon la norme ETRTO - European Tyre and Rim Technoical Organization), on utilise une jante de diamètre plus petit de 1 pouce, et de largeur plus faible que ce que l'on utiliserait pour monter directement ce même pneumatique. Dans la plupart des cas, on utilise deux extenseurs élastiques identiques, comme montré à la figure 5 du document précédemment cité.  When it is desired to use an elastic expander in order to increase the capacity of a rolling assembly to pass without damage and / or with a much increased riding comfort potholes of significant depth, for a tire of diameter and of given width (measured according to the ETRTO standard - European Tire and Rim Technoical Organization), using a rim of diameter 1 inch smaller, and width smaller than what would be used to directly mount the same tire. In most cases, two identical elastic stents are used, as shown in Figure 5 of the previously cited document.
[0006] Un ensemble roulant, équipé de deux extenseurs tels que décrit dans le document précédemment cité, assure les principales fonctions d'un ensemble roulant classique, dans lequel le pneumatique est monté directement sur sa jante recommandée, et procure en outre de meilleures performances en endurance en utilisation sur des routes dégradées. Cependant, l'augmentation de un pouce du diamètre au siège conduit au global à une plus grande intrusivité de l'ensemble roulant, ou à l'inverse, le fait de devoir recourir à une jante de diamètre moindre laisse moins de place pour loger les freins dans la roue.  A rolling assembly, equipped with two expanders as described in the aforementioned document, provides the main functions of a conventional roller assembly, in which the tire is mounted directly on its recommended rim, and also provides better performance endurance in use on degraded roads. However, the increase of one inch of the diameter to the seat generally leads to greater intrusiveness of the wheel assembly, or conversely, the fact of having to resort to a rim of smaller diameter leaves less room to house the seats. brakes in the wheel.
[0007] L'objectif de la présente invention est de proposer une évolution d'un ensemble pneumatique comportant un pneumatique dont les bourrelets respectent les standards actuels, comportant également une jante et deux extenseurs, l'ensemble étant de meilleure compacité. Description brève de l'invention The objective of the present invention is to provide an evolution of a tire assembly comprising a tire whose beads comply with current standards, also comprising a rim and two expanders, the whole being of better compactness. Brief description of the invention
[0008] L'invention a donc pour objet un extenseur flexible pour ensemble roulant, ledit ensemble roulant comprenant un pneumatique ayant deux bourrelets, une jante et deux extenseur destinés chacun à assurer la jonction entre l'un des bourrelets et la jante, ladite jante ayant deux sièges sur jante orientés radialement vers l'extérieur, ledit extenseur formant une pièce de révolution à l'état libre de toute contrainte, ledit extenseur comprenant une extrémité axialement intérieure ayant une face radialement intérieure orientée radialement vers l'intérieur destinée à être montée sur l'un desdits sièges sur jante, ladite extrémité axialement intérieure ayant un diamètre D3 et étant destinée à être immobilisé axialement contre le rebord de jante adjacent, ledit extenseur comprenant une extrémité axialement extérieure et un corps orienté principalement axialement et disposé entre ladite extrémité axialement extérieure et ladite extrémité axialement intérieure, ledit extenseur ayant un siège sur extenseur orienté radialement vers l'extérieur, de diamètre Dl et destiné à recevoir un bourrelet de pneumatique, caractérisé en ce que ladite face radialement intérieure est une surface sensiblement tronconique d'angle supérieur à 10°, et en ce que la différence « d » entre les diamètres Dl et D3, d=Dl-D3, est sensiblement nulle.  The invention therefore relates to a flexible expander for rolling assembly, said assembly comprising a tire having two beads, a rim and two expander each intended to provide the junction between one of the beads and the rim, said rim having two radially outwardly oriented rim seats, said stent forming a piece of revolution in the unconstrained state, said stent including an axially inner end having a radially inwardly radially inwardly facing face for mounting on one of said rim seats, said axially inner end having a diameter D3 and being intended to be immobilized axially against the adjacent rim flange, said stent comprising an axially outer end and a body oriented principally axially and disposed between said end axially outer and said axially in wherein said stent having a radially outwardly extending stent seat of diameter D1 and adapted to receive a tire bead, characterized in that said radially inner face is a substantially frustoconical surface of an angle greater than 10 °, and in that the difference "d" between the diameters D1 and D3, d = D1-D3, is substantially zero.
[0009] L'invention s'étend aussi à une jante pour ensemble roulant, ledit ensemble roulant comprenant un pneumatique ayant deux bourrelets, une jante et deux extenseur destinés chacun à assurer la jonction entre l'un des bourrelets et la jante, ladite jante ayant deux sièges sur jante orientés radialement vers l'extérieur, chaque siège sur jante étant prolongé axialement vers l'extérieur par un rebord de jante, ladite jante ayant une largeur W, caractérisé en ce que chaque siège sur jante est une surface sensiblement tronconique d'angle supérieur à 10°, la largeur W de jante est inférieure à 9 "et chaque siège sur jante est prolongé axialement vers l'intérieur par un bossage destiné à contrarier le déplacement axial vers l'intérieur de l'extenseur.  The invention also extends to a wheel assembly rim, said wheel assembly comprising a tire having two beads, a rim and two expander each intended to provide the junction between one of the beads and the rim, said rim having two radially outwardly oriented rim seats, each rim seat being extended axially outwardly by a rim flange, said rim having a width W, characterized in that each rim seat is a substantially frustoconical surface of An angle greater than 10 °, the width W of the rim is less than 9 "and each rim seat is extended axially inwardly by a boss intended to thwart the axial displacement towards the inside of the stent.
[0010] Enfin, l'invention s'étend aussi à un ensemble comprenant une jante comme indiqué ci- dessus et deux extenseurs comme indiqué ci-dessus.  Finally, the invention also extends to an assembly comprising a rim as indicated above and two stents as indicated above.
Description de la figure unique Description of the single figure
[0011] L'invention est décrite ci-après à l'aide de la figure 1, qui représente une coupe radiale partielle et schématique d'une jante pour ensemble roulant avec extenseur selon l'invention. Description détaillée de l'invention The invention is described below with reference to Figure 1, which shows a partial and schematic radial section of a rim for rolling assembly with extender according to the invention. Detailed description of the invention
[0012] La figure 1 montre partiellement une jante 3 ayant deux sièges sur jante 31 orientés radialement vers l'extérieur, de diamètre D3 ; les sièges sur jante 31 sont orientés radialement vers l'extérieur ; chaque siège sur jante 31 est prolongé axialement vers l'extérieur par un rebord de jante 32 et est prolongé axialement vers l'intérieur par un bossage 33 communément désigné par « hump », dont la fonction est de contrarier le déplacement axial vers l'intérieur de l'extenseur 3, à l'image des humps dé jantes pour montage « tubeless » des pneumatiques, dont la fonction est d'empêcher le décoincement du bourrelet de pneumatique. Dans la mise en œuvre avantageuse de l'invention illustrée au moyen de la figure 1, chaque siège sur jante 31 est une surface sensiblement tronconique d'angle a (par rapport à l'axe de rotation) valant 15°, plus généralement supérieur à 10° ceci afin d'assurer un serrage suffisant de l'extenseur sur la jante 3. Ainsi, conformément aux normes en application universelle à la date de priorité de la présente demande, ledit angle a est d'inclinaison telle que, si l'on prolonge la droite que définit chaque siège sur jante 31 sur une section méridienne, ladite droite coupe l'axe de rotation de ladite jante axialement du côté opposé au rebord de jante 32. Autrement dit, les sièges sur jante 31 sont orientés axialement vers l'intérieur. Dès lors, de préférence, lesdits sièges sur jante sont à la fois orientés radialement vers l'extérieur et axialement vers l'intérieur.  Figure 1 partially shows a rim 3 having two seats on the rim 31 oriented radially outwardly, of diameter D3; the seats on the rim 31 are oriented radially outwards; each seat on rim 31 is extended axially outwardly by a rim flange 32 and is extended axially inwardly by a boss 33 commonly referred to as "hump", the function of which is to thwart the axial movement inwards of the expander 3, like the humps de rims for "tubeless" mounting of the tires, the function of which is to prevent loosening of the tire bead. In the advantageous implementation of the invention illustrated by means of FIG. 1, each seat on rim 31 is a substantially frustoconical surface of angle α (with respect to the axis of rotation) of 15 °, more generally greater than 10 ° so as to ensure sufficient clamping of the expander on the rim 3. Thus, in accordance with the standards in universal application at the priority date of the present application, said angle a is inclined such that, if the the right defined by each seat on the rim 31 is extended on a meridian section, said straight line intersects the axis of rotation of said rim axially on the side opposite to the rim flange 32. In other words, the seats on the rim 31 are oriented axially towards the rim 31 inside. Therefore, preferably, said rim seats are both oriented radially outwardly and axially inwardly.
[0013] On voit aussi une coupe radiale d'un extenseur 1 selon l'invention. Il comporte une extrémité axialement intérieure 10 destinée à être montée sur l'un desdits sièges sur jante. Il comporte une extrémité axialement extérieure 11 et corps 12 orienté sensiblement axialement et disposé entre ladite extrémité axialement extérieure 11 et ladite extrémité axialement intérieure 10. Le corps 12 est formé par une matière élastomérique renforcée par une couche d'éléments de renfort. Ces renforts peuvent être des fibres, des câbles métalliques, des câbles textiles. Ladite extrémité axialement intérieure 10 a une face radialement intérieure 101 sensiblement tronconique, orientée radialement vers l'extérieur, dont l'angle a est égal à 15°, plus généralement supérieur à 10° ceci afin d'assurer un serrage suffisant de l'extenseur 1 sur la jante 3. L'extenseur a un siège sur extenseur 13 orienté radialement vers l'extérieur ; en outre, ledit siège sur extenseur est aussi orienté axialement vers l'intérieur.  We also see a radial section of a stent 1 according to the invention. It has an axially inner end 10 to be mounted on one of said seats on the rim. It comprises an axially outer end 11 and body 12 oriented substantially axially and disposed between said axially outer end 11 and said axially inner end 10. The body 12 is formed by an elastomeric material reinforced by a layer of reinforcing elements. These reinforcements may be fibers, metal cables, textile cables. Said axially inner end 10 has a substantially frustoconical radially inwardly facing surface 101, radially outwardly oriented, whose angle a is equal to 15 °, more generally greater than 10 ° in order to ensure sufficient clamping of the expander 1 on the rim 3. The expander has a seat on extender 13 oriented radially outwardly; in addition, said seat on the stent is also oriented axially inwards.
[0014] Cette invention se distingue de ce qui est proposé dans le document WO2016/046197 par le fait que le diamètre de siège sur jante est le même que le de siège de bourrelet du pneumatique. Cela conduit à une zone d'accrochage sur la jante de l'extenseur de type « seat coincé » (angle de la surface tronconique de siège sur jante de 15° au lieu des 5° des jantes tourismes habituelles). Le rebord de jante 32 est de très faible hauteur radiale pour permettre la montabilité de l'extenseur. L'extenseur est aisément "démontable" car retenu seulement « coincé » du fait de la pression de gonflage du pneumatique (et pas immobilisé sous effort de serrage comme un pneumatique standard pour véhicule de tourisme). This invention differs from that proposed in WO2016 / 046197 in that the seat diameter on the rim is the same as the bead seat of the tire. This leads to an attachment zone on the rim of the "wedged seat" type extender (angle of the frustoconical surface of seat on rim of 15 ° instead of 5 ° of usual rims). The rim flange 32 is of very small radial height to allow the mountability of the stent. The expander is easily "removable" because retained only "stuck" due to the inflation pressure of the tire (and not immobilized under clamping force as a standard tire for passenger vehicle).
[0015] Examinons plus en détail comment construire un profil vu en coupe méridienne d'un extenseur selon l'invention. On se base sur les normes de l'ETRTO donnant les diamètres de siège sur jante, et plus particulièrement les sections relatives à « 15° Drop Center Rims ». Le diamètre D3 de ladite extrémité axialement intérieure 10 est aussi le diamètre du siège sur jante 31 et se mesure à l'intersection de la surface tronconique du siège sur jante et de la face axialement intérieure du rebord de jante, comme enseigné les normes de l'ETRTO. Le diamètre Dl du siège sur extenseur 13 est aussi le diamètre du bourrelet de pneumatique, et se mesure à l'intersection de la surface tronconique du siège sur extenseur et de la face axialement intérieure de l'extrémité axialement extérieure 11 de l'extenseur, c'est-à-dire comme on mesurerait le diamètre d'une jante équivalente sur laquelle on monterait directement un pneumatique sans extenseur, ce qui permet de renvoyer le lecteur aux normes de l'ETRTO. L'objectif industriel est de respecter totalement les standards de fabrication des pneus, et de rester autant conforme que possible des règles existantes en matière de fabrication de jantes. D'où la proposition de l'invention de suivre les règles en matières de sièges à 15° (dits « seat coincé ou « 15° drop center rim ») qui, si elles sont habituelles pour des jantes pour véhicules poids lourd, ne sont jamais utilisées pour des jantes pour véhicules de tourisme ou pour des camionnettes.  Let us examine in more detail how to build a profile seen in meridian section of a stent according to the invention. Based on the ETRTO standards for rim seat diameters, and more specifically the "15 ° Drop Center Rims" sections. The diameter D3 of said axially inner end 10 is also the diameter of the seat on the rim 31 and is measured at the intersection of the frustoconical surface of the seat on the rim and the axially inner face of the rim flange, as taught by the standards of the rim. ETRTO. The diameter D1 of the seat on the stent 13 is also the diameter of the tire bead, and is measured at the intersection of the frustoconical surface of the seat on the stent and the axially inner face of the axially outer end 11 of the stent, that is to say, as one would measure the diameter of an equivalent rim on which a tire without a stent would be mounted directly, which makes it possible to refer the reader to the standards of the ETRTO. The industrial objective is to fully respect tire manufacturing standards, and to comply as much as possible with existing rim manufacturing rules. Hence the proposal of the invention to follow the rules of seating 15 ° (so-called "stuck seat" or "15 ° drop center rim") which, if they are usual for rims for heavy vehicles, are not never used for rims for passenger vehicles or for vans.
[0016] En conséquence, l'invention s'étend à une jante de largeur W inférieure à 9", soit une jante assez étroite même pour des applications à des véhicules de tourisme. L'invention s'étend aussi à un ensemble roulant qui comprend, comme on le voit à la figure 1, un pneumatique 2 comportant deux bourrelets 21 et un ensemble formé par une jante 3 et deux extenseurs 1 ; la jante 3 a une largeur W égale à au minimum 50 % et au maximum 80% de la largeur axiale L du pneumatique 2 gonflé à sa pression de service et mesurée entre bourrelets 2 (entre les points déterminant le diamètre de bourrelet sur une section radiale) ; deux extenseurs 1 assurent la jonction entre la jante 3 et chacun un bourrelet 21 du pneumatique 2 ; chaque extenseur 1 a une largeur 1 = (L-W)/2, soit égale à la moitié de la différence entre la largeur axiale L du pneumatique 2 et la largeur W de la jante, et ses diamètres Dl d'extrémité axialement intérieure 10 et D3 du siège sur extenseur 13 sont identiques. [0017] Par les dispositions décrites ci-dessus, le montage de l'extenseur 1 sur la jante 3 s'avère plus simple tout en améliorant sa tenue sur siège sur jante (performance en capacité de ne pas déjanter améliorée) par rapport aux extenseurs connus de l'état de la technique. Accordingly, the invention extends to a rim W width less than 9 ", a fairly narrow rim even for applications to passenger vehicles.The invention also extends to a rolling assembly which comprises, as seen in Figure 1, a tire 2 having two beads 21 and an assembly formed by a rim 3 and two stents 1, the rim 3 has a width W equal to at least 50% and at most 80% of the axial width L of the tire 2 inflated to its operating pressure and measured between beads 2 (between the points determining the bead diameter on a radial section), two stents 1 provide the junction between the rim 3 and each a bead 21 of the tire 2, each expander 1 has a width 1 = (LW) / 2, equal to half the difference between the axial width L of the tire 2 and the width W of the rim, and its diameters D1 of the axially inner end 10 and D3 of the seat on expander 13 are the same. By the arrangements described above, the mounting of the expander 1 on the rim 3 proves simpler while improving its grip on seat rim (performance capacity not to be improved) compared to the extensors known from the state of the art.

Claims

Revendications claims
1. Extenseur (1) flexible pour ensemble roulant, ledit ensemble roulant comprenant un pneumatique (2) ayant deux bourrelets (21), une jante (3) et deux extenseur (1) destinés chacun à assurer la jonction entre l'un des bourrelets (21) et la jante (3), ladite jante (3) ayant deux sièges sur jante (31) orientés radialement vers l'extérieur, ledit extenseur formant une pièce de révolution à l'état libre de toute contrainte, ledit extenseur comprenant une extrémité axialement intérieure (10) ayant une face radialement intérieure (101) orientée radialement vers l'intérieur, destinée à être montée sur l'un desdits sièges sur jante (31), ladite extrémité axialement intérieure (10) ayant un diamètre D3 et étant destinée à être immobilisé axialement contre le rebord de jante adjacent (32), ledit extenseur comprenant une extrémité axialement extérieure (11) et un corps (12) orienté principalement axialement et disposé entre ladite extrémité axialement extérieure (11) et ladite extrémité axialement intérieure (10), ledit extenseur ayant un siège sur extenseur (13) orienté radialement vers l'extérieur, de diamètre Dl et destiné à recevoir un bourrelet de pneumatique, caractérisé en ce que : 1. Extender (1) flexible for rolling assembly, said rolling assembly comprising a tire (2) having two beads (21), a rim (3) and two expander (1) each intended to ensure the junction between one of the beads (21) and the rim (3), said rim (3) having two rim seats (31) oriented radially outwards, said stent forming a piece of revolution in the stress-free state, said stent comprising a an axially inner end (10) having a radially inwardly radially inwardly facing inner face (101) for mounting on one of said rim seats (31), said axially inner end (10) having a diameter D3 and being intended to be immobilized axially against the adjacent rim flange (32), said stent comprising an axially outer end (11) and a body (12) oriented mainly axially and disposed between said axially outer end; ure (11) and said axially inner end (10), said stent having a radially outwardly extending stent seat (13) of diameter D1 for receiving a tire bead, characterized in that:
ladite face radialement intérieure (101) est une surface sensiblement tronconique d'angle a supérieur à 10°,  said radially inner face (101) is a substantially frustoconical surface of angle α greater than 10 °,
la différence « d » entre les diamètres Dl et D3, d=Dl-D3, est sensiblement nulle.  the difference "d" between the diameters D1 and D3, d = D1-D3, is substantially zero.
2. Jante (3) pour ensemble roulant, ledit ensemble roulant comprenant un pneumatique (2) ayant deux bourrelets (21), une jante (3) et deux extenseur (1) destinés chacun à assurer la jonction entre l'un des bourrelets (21) et la jante (3), ladite jante (3) ayant deux sièges sur jante (31) orientés radialement vers l'extérieur, chaque siège sur jante (31) étant prolongé axialement vers l'extérieur par un rebord de jante (32), ladite jante ayant une largeur W, caractérisé en ce que 2. Rim (3) for a roller assembly, said roller assembly comprising a tire (2) having two beads (21), a rim (3) and two expander (1) each intended to ensure the junction between one of the beads ( 21) and the rim (3), said rim (3) having two rim seats (31) oriented radially outwardly, each rim seat (31) being extended axially outwardly by a rim flange (32). ), said rim having a width W, characterized in that
chaque siège sur jante (31) est une surface sensiblement tronconique d'angle supérieur à 10°,  each rim seat (31) is a substantially frustoconical surface with an angle greater than 10 °,
la largeur W de jante est inférieure à 9",  the width W of the rim is less than 9 ",
chaque siège sur jante (31) est prolongé axialement vers l'intérieur par un bossage (33) destiné à contrarier le déplacement axial vers l'intérieur de l'extenseur (3). each rim seat (31) is extended axially inwardly by a boss (33) to counter the axial movement inwardly of the stent (3).
3. Jante selon la revendication 2, dans laquelle l'angle est sensiblement égal à 15°. Rim according to claim 2, wherein the angle is substantially equal to 15 °.
4. Ensemble comprenant une jante (3) selon la revendication 2 ou 3 et deux extenseurs (1) selon la revendication 1. 4. An assembly comprising a rim (3) according to claim 2 or 3 and two stents (1) according to claim 1.
5. Ensemble roulant comprenant un ensemble selon la revendication 4 et un pneumatique (2), dans lequel chaque extenseur (1) a une largeur 1 = (L-W)/2, avec L étant la largeur axiale du pneumatique (2) gonflé à sa pression de service et mesurée entre bourrelets (21) et W étant la largeur W de la jante. Rolling assembly comprising an assembly according to Claim 4 and a tire (2), in which each stent (1) has a width 1 = (LW) / 2, with L being the axial width of the tire (2) inflated at its operating pressure and measured between beads (21) and W being the width W of the rim.
PCT/FR2017/052080 2016-07-27 2017-07-26 Adapter and rim for a rolling assembly, assembly formed by the adapter and the rim, and rolling assembly comprising same WO2018020152A1 (en)

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FR16/57228 2016-07-27
FR1657228A FR3054479A3 (en) 2016-07-27 2016-07-27 ADAPTER AND RIM FOR ROLLING ASSEMBLY, ASSEMBLY FORMED BY ADAPTER AND RIM, AND ROLLING ASSEMBLY COMPRISING SAME

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EP3774398A4 (en) * 2018-03-30 2021-11-10 Compagnie Generale Des Etablissements Michelin A rolling assembly
WO2019187011A1 (en) * 2018-03-30 2019-10-03 Compagnie Generale Des Etablissements Michelin A rolling assembly

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