WO2022167743A1 - Pneumatique presentant un nouveau chemin conducteur - Google Patents
Pneumatique presentant un nouveau chemin conducteur Download PDFInfo
- Publication number
- WO2022167743A1 WO2022167743A1 PCT/FR2022/050152 FR2022050152W WO2022167743A1 WO 2022167743 A1 WO2022167743 A1 WO 2022167743A1 FR 2022050152 W FR2022050152 W FR 2022050152W WO 2022167743 A1 WO2022167743 A1 WO 2022167743A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reinforcement
- electrically conductive
- tire
- radially
- working
- Prior art date
Links
- 230000037361 pathway Effects 0.000 title 1
- 230000002787 reinforcement Effects 0.000 claims abstract description 312
- 239000004020 conductor Substances 0.000 claims description 70
- 239000011324 bead Substances 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 26
- 239000012777 electrically insulating material Substances 0.000 claims description 23
- 230000003014 reinforcing effect Effects 0.000 claims description 19
- 238000005096 rolling process Methods 0.000 claims description 12
- 239000013536 elastomeric material Substances 0.000 claims description 7
- 239000010410 layer Substances 0.000 description 149
- 238000004519 manufacturing process Methods 0.000 description 18
- 239000000945 filler Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 8
- 238000004804 winding Methods 0.000 description 7
- 230000000712 assembly Effects 0.000 description 6
- 238000000429 assembly Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008520 organization Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
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- 238000004132 cross linking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 239000004953 Aliphatic polyamide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229920003231 aliphatic polyamide Polymers 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 229920003244 diene elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 229920003052 natural elastomer Polymers 0.000 description 1
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Classifications
-
- 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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/08—Electric-charge-dissipating arrangements
-
- 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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/08—Electric-charge-dissipating arrangements
- B60C19/082—Electric-charge-dissipating arrangements comprising a conductive tread insert
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/2003—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords
- B60C9/2009—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel characterised by the materials of the belt cords comprising plies of different materials
-
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
Definitions
- the present invention relates to a tire.
- the tire also comprises a carcass reinforcement anchored in each bead and extending in each sidewall and in the crown.
- the crown comprises a tread intended to come into contact with the ground when the tire is rolling, as well as a crown reinforcement arranged radially between the tread and the carcass reinforcement which extends radially inside the top frame.
- the crown reinforcement and the tread are arranged in contact with one another.
- the crown reinforcement comprises a working reinforcement comprising a radially innermost layer and a radially outermost layer arranged radially outside the radially innermost layer.
- the crown reinforcement also includes a hooping reinforcement arranged radially outside the working reinforcement and comprising a hooping layer.
- the tire described in EP1526005 also comprises an electrically conductive element arranged so as to ensure electrical conductivity between a mounting support when the tire is mounted on the mounting support and the crown radially through at least one of the sidewalls through the electrically conductive element.
- a mounting bracket includes an electrically conductive metal rim.
- the electrically conductive element of the tire of EP1526005 is arranged so as to ensure electrical conductivity from a mass of an electrically conductive material intended to be in contact with the mounting support when the tire is mounted on the mounting support up to 'to the radially innermost working layer through at least one of the sidewalls via the electrically conductive element.
- the crown of the tire of EP1526005 is arranged so as to ensure electrical conductivity from the electrically conductive element to the running surface via the two working layers, the hoop layer, an underlayer and a tread surface layer.
- the reduction of the hysteresis of the tread and of the crown reinforcement is in particular obtained by using crown layers, in particular working layers, comprising wire reinforcement elements embedded in materials with low hysteresis at base of fillers comprising, as majority filler, silica.
- Such weakly hysteretic materials if they make it possible to significantly reduce the hysteresis, are generally electrically insulating with respect to electrically conductive materials based on fillers comprising, as majority filler, carbon black.
- JP2010159017 Other tires allowing the electrical charge to be evacuated by avoiding the working reinforcement and not via the hooping layer, but through the hooping reinforcement.
- Such tires are described in JP2010159017.
- the tire of JP2010159017 comprises an additional conductive element arranged so as to ensure electrical conductivity between the electrically conductive element and the hooping reinforcement.
- the additional conductive element takes the form of a strip wound around one of the axial ends of the radially innermost working layer, which makes it possible to provide a conductive path that does not pass through the intermediary of the working layers. Nevertheless, such a solution is relatively complex due to the need to arrange the additional conductive element around one of the axial ends of the radially innermost working layer.
- the object of the invention is to allow the use of electrically insulating materials in at least the working reinforcement while allowing satisfactory evacuation of the electric charge from the vehicle to the road surface via the pneumatic and this, in a simple way.
- the subject of the invention is a tire intended to be mounted on a mounting support and comprising a crown, two beads, two sidewalls each connecting each bead to the crown and a carcass reinforcement anchored in each bead, the crown comprising a tread comprising a tread surface intended to come into contact with a road surface and a crown reinforcement, the carcass reinforcement extending in each sidewall and in the crown radially internally to the crown, the crown reinforcement being arranged radially between the tread and the carcass reinforcement and comprising: - a working reinforcement comprising at least one radially outermost working layer of the working reinforcement,
- the tire comprising an electrically conductive element arranged so as to ensure electrical conductivity between a mounting support when the tire is mounted on the mounting support and the crown via the conductive element, the crown being arranged to provide electrical conductivity from the electrically conductive element to the rolling surface radially through or via the hooping reinforcement and via the tread, at least a so-called interposed portion of the electrically conductive element being radially arranged between the radially outermost working layer of the working reinforcement and the hooping reinforcement, the electrically conductive element extending radially inside the equatorial circumferential plane of the tire, the electrically conductive element is radially nt continuous between:
- any point of the electrically conductive element located radially between the radially outermost working layer of the working reinforcement and the shrink-fit reinforcement.
- the electrically conductive path passes radially through the hooping reinforcement or else through the hooping reinforcement.
- a conductive path avoiding the hooping reinforcement requires the use of a tread comprising at least one mass of a material arranged in contact with the electrically conductive element so as to ensure electrical conductivity between the electrically conductive element and the running surface without passing through or through the shrink-fit reinforcement, which limits or even prohibits the use of materials with low hysteresis in the tread.
- radially continuous it is meant that there are no junctions, for example by abutment or by superposition, between several distinct portions of the conductive element. This avoids the incorporation of several distinct portions whose junction interfaces would have to be checked so as to ensure the continuity of the electrically conductive path between the points described above.
- the tire according to the invention has an electrical resistance of less than or equal to 10 10 ohms and preferably less than or equal to 10 8 ohms, the electrical resistance being measured according to standard ISO 16392:2017.
- a layer or several layers of a matrix preferably elastomeric, in which are embedded one or more reinforcing elements, preferably one or more elements wired reinforcement intended to reinforce the matrix of the or each layer.
- an element is arranged so as to ensure electrical conductivity from a first member to a second member when it forms a conductive path extending from the first member to the second member.
- the element is arranged in contact with the first member and the second member.
- an element is arranged so as to ensure electrical conductivity between a first member and a second member when it forms a conductive path extending between the first member and the second member without necessarily extending from the first organ to the second organ.
- the element can form all or part of the conductive path extending from the first member to the second member.
- an element arranged to prevent electrical conductivity through this element means that the conductive path does not pass through the element. Conversely, an element arranged in such a way as to ensure electrical conductivity through this element means that the conductive path passes through this element.
- an element arranged to prevent electrical conductivity or an insulating material of such an element is such that the element does not form part of the conductive path between the mounting bracket and the running surface when the tire is mounted on the mounting bracket.
- an element arranged so as to ensure the electrical conductivity or electrically conductive material of such an element is such that it forms part of the conductive path between the mounting bracket and the running surface when the tire is mounted on the mounting bracket.
- majority filler in a material it is meant that this filler is the majority among the fillers in the material, that is to say that it is the one which represents the greatest quantity by mass among fillers.
- material based on means a material comprising the mixture and/or the in situ reaction product of the various constituents used, some of these constituents being able to react and/or being intended to react with one another, less partially, during the different manufacturing phases of the material; the material composition can thus be in the totally or partially crosslinked state or in the non-crosslinked state.
- the tires of the invention are preferably intended for passenger vehicles as defined within the meaning of the standard of the European Tire and Rim Technical Organization or "ETRTO", 2020.
- Such a tire has a section in a plane of meridian cut characterized by a section height H and a nominal section width or section thickness S within the meaning of the standard of the European Tire and Rim Technical Organization or "ETRTO", 2020 such that, very advantageously and for most tires, the H/S ratio, expressed as a percentage, is at most equal to 90, preferably at most equal to 80 and more preferably at most equal to 70 and is at least equal to 30, preferably at least equal to 40, and the section width S is, very advantageously and for most tires, at least equal to 115 mm, preferably at least equal to 155 mm and more preferably at least equal to 175 mm and at most equal to 385 mm, preferably at least plus equal to 315 mm , more preferably at most equal to 285 mm and even more preferably at most equal to 255 mm.
- axial direction is meant the direction substantially parallel to the main axis of the tire or of the main manufacturing support, that is to say the axis of rotation of the tire or of the main manufacturing support.
- circumferential direction is meant the direction which is substantially perpendicular both to the axial direction and to a radius of the tire or of the main manufacturing support (in other words, tangent to a circle whose center is on the axis of rotation of the tire or of the main manufacturing support).
- radial direction means the direction along a radius of the tire or of the main manufacturing support, that is to say any direction intersecting the axis of rotation of the tire or of the main manufacturing support and substantially perpendicular to this axis.
- the median plane of the tire (denoted M) means the plane perpendicular to the axis of rotation of the tire which is located halfway between the axial distance of the two beads and passes through the axial center of the crown reinforcement.
- equatorial circumferential plane of the tire (denoted E), is meant the theoretical cylindrical surface passing through the equator of the tire, perpendicular to the median plane and to the radial direction.
- the equator of the tire is, in a meridian section plane (plane perpendicular to the circumferential direction and parallel to the radial and axial directions) the axis parallel to the axis of rotation of the tire and located equidistant between the radially most outside of the tread intended to be in contact with the ground and the radially innermost point of the tire intended to be in contact with a support, for example a rim, the distance between these two points being equal to H.
- meridian plane we mean a plane parallel to and containing the axis of rotation of the tire and perpendicular to the circumferential direction.
- each bead we mean the portion of the tire intended to allow the attachment of the tire to a mounting support, for example a wheel comprising a rim.
- a mounting support for example a wheel comprising a rim.
- each bead is in particular intended to be in contact with a hook of the rim allowing it to be attached.
- main direction in which a wired reinforcement element extends we understand the direction in which the wired reinforcement element extends along its greatest length.
- the main direction in which a wired reinforcing element extends can be straight or curved, the reinforcing element being able to describe along its main direction a straight or wavy trajectory.
- Any interval of values denoted by the expression “between a and b” represents the range of values going from more than a to less than b (i.e. limits a and b excluded) while any interval of values designated by the expression “from a to b” means the range of values going from a to b (that is to say including the strict limits a and b).
- the angle considered is the angle, in absolute value, the smaller of the two angles defined between the reference straight line, here the circumferential direction of the tire, and the main direction in which the Considered wired reinforcement stretches.
- orientation of an angle we mean the direction, clockwise or anti-clockwise, in which it is necessary to turn from the reference line, here the circumferential direction of the support or of the tire, defining the angle to reach the main direction along which the considered wire reinforcement element extends.
- the considered angles formed by the main directions in which the wired working and carcass reinforcing elements extend are by convention angles of opposite orientations and the angle formed by the main direction in which extends each working wire reinforcement element is, in absolute value, the smaller of the two angles defined between the reference straight line, here the circumferential direction of the support or of the tire and the main direction in which the wire reinforcement element of work extends.
- the angle formed by the main direction along which each wired working reinforcement element extends defines an orientation which is opposite to that formed by the angle of the main direction along which each wired working reinforcement element extends. carcass.
- the crown comprises the tread and the crown reinforcement.
- tread is meant a strip of polymeric material, preferably elastomeric, delimited: radially outward, by the tread surface and radially inward, by the crown reinforcement. axially by two planes perpendicular to the axial direction and passing through the axial ends of the running surface.
- the rolling surface is determined on a tire mounted on a nominal rim and inflated to the nominal pressure within the meaning of the standard of the European Tire and Rim Technical Organization or “ETRTO”, 2020.
- ERRTO European Tire and Rim Technical Organization
- the axial ends and axial width of the tread surface are simply determined.
- the running surface is continuous with the outer surfaces of the sidewalls of the tire
- the axial ends of the running surface are, in a meridian section plane, coincident with the point for which the angle between the tangent to the running surface and a straight line parallel to the axial direction passing through this point is equal to 30°.
- the radially outermost point is retained.
- the strip of polymeric material consists of a layer consisting of a material, preferably polymeric and more preferably elastomeric, or else comprising several layers, each layer preferably consisting of a polymeric material, and more preferably elastomeric.
- the crown reinforcement comprises a single hooping reinforcement and a single working reinforcement.
- the crown reinforcement is, with the exception of the hooping reinforcement and the working reinforcement, devoid of any reinforcement reinforced by wire reinforcement elements.
- the wire reinforcement elements of such reinforcements excluded from the crown reinforcement of the tire include metal wire reinforcement elements and textile wire reinforcement elements.
- the crown reinforcement consists of the hooping reinforcement and the working reinforcement.
- the crown is, with the exception of the crown reinforcement, devoid of any reinforcement reinforced by wire reinforcement elements.
- the wire reinforcement elements of such reinforcements excluded from the crown of the tire comprise metal wire reinforcement elements and textile wire reinforcement elements.
- the crown is formed by the tread and the crown reinforcement.
- the carcass reinforcement is arranged directly radially in contact with the crown reinforcement and the crown reinforcement is arranged directly radially in contact with the tread.
- the invention can advantageously be used in an embodiment in which the working armature is arranged so as to prevent electrical conductivity through the working armature.
- the or each working layer comprises working wire reinforcement elements embedded in an electrically insulating material.
- Such working wire reinforcement elements are preferably metallic. Nevertheless, it is possible to envisage polymeric or mineral wire reinforcement elements, that is to say comprising one or more polymeric or mineral monofilaments.
- Each polymeric monofilament is preferably chosen from aliphatic polyamide, aromatic polyamide and polyester monofilaments.
- Each mineral monofilament is preferably chosen from carbon or glass monofilaments.
- the wired working reinforcement elements extend axially from one axial edge to the other axial edge of the working layer. work substantially parallel to each other.
- the working reinforcement comprises a single working layer.
- the radially outermost working layer is therefore the only working layer.
- the presence of a single working layer makes it possible in particular to lighten the tire, and therefore to reduce the energy dissipated by crown hysteresis and therefore reduce the rolling resistance of the tyre.
- the working reinforcement is, with the exception of the working layer, devoid of any layer reinforced by wire reinforcing elements.
- the wire reinforcement elements of such reinforced layers excluded from the working reinforcement of the tire comprise metal wire reinforcement elements and textile wire reinforcement elements.
- the working reinforcement consists of the single working layer.
- the working reinforcement comprises a radially innermost layer and a radially outermost layer arranged radially outside the radially innermost layer.
- each wired working reinforcement element extends in a main direction forming, with the circumferential direction of the tire, an angle, in absolute value, strictly greater than 10°, preferably ranging from 15 ° to 50°.
- the hooping reinforcement is arranged so as to ensure electrical conductivity from the interposed portion of the electrically conductive element to the tread by means of the hooping reinforcement.
- the hooping reinforcement is in contact with the electrically conductive element and in contact with the tread so as to form the conductive path electrically connecting the electrically conductive element and the tread.
- the hooping reinforcement comprises one or more hooping wire reinforcing elements embedded in an electrically conductive material.
- such hooping wire reinforcing elements are polymeric or mineral wire reinforcing elements as described above with reference to working reinforcing wire elements.
- the tread comprises one or more masses of one or more electrically conductive materials, the or each mass of the electrically conductive material(s) being arranged so as to ensure the conductivity electric from the hooping reinforcement to the running surface via the or each mass.
- the tread is in contact with the hooping reinforcement so as to form the conductive path electrically connecting the hooping reinforcement and the running surface.
- the tread comprises one or more masses of one or more materials electrically insulating and at least one mass of at least one electrically conductive material arranged so as to provide electrical conductivity from the hooping reinforcement to the running surface via the mass of electrically conductive material radially therethrough of the mass(es) of the electrically insulating material(s).
- the mass of the electrically conductive material is in contact with the hooping armature and in contact with the running surface so as to form the conductive path electrically connecting the hooping armature and the running surface.
- the volume of the mass or masses of electrically insulating materials is greater than or equal to 50%, preferably greater than or equal to 75% and more preferably greater than or equal to 95% of the tread volume.
- the hooping reinforcement is arranged so as to prevent electrical conductivity from the interposed portion of the electrically conductive element to the tread through the hooping reinforcement.
- the hooping reinforcement comprises one or more hooping wire reinforcement elements embedded in an electrically insulating elastomeric material.
- the crown comprises an additional mass of an electrically conductive material arranged so as to ensure electrical conductivity from the interposed portion of the electrically conductive element to the band of rolling radially through the hooping reinforcement via the additional mass of the electrically conductive material.
- the additional mass is in contact with the electrically conductive element and in contact with the tread so as to form the conductive path electrically connecting the electrically conductive element and the tread .
- the additional mass is arranged radially between the tread and the intercalated portion of the conductive electrical element and axially arranged between first and second axial portions of the hooping reinforcement.
- the additional mass can be positioned axially between the first and second axial portions, the axial widths of which will be determined according to the desired performance of the hooping reinforcement.
- the hooping reinforcement being delimited axially by two axial edges of the hooping reinforcement, the hooping reinforcement comprises a single band wound circumferentially helically so as to extend continuously axially from one of the axial edges of the hooping reinforcement to the other of the edges of the hooping reinforcement.
- the band is continuous between the first and second axial portions of the hooping reinforcement which are interconnected by a portion of the band.
- the manufacturing process is relatively simple as it includes a step of continuously winding the strip to form the hooping reinforcement.
- the hooping reinforcement being delimited axially by two axial edges of the hooping reinforcement, the first and second axial portions are axially separated from each other so that:
- the first axial portion comprises a first strip wound circumferentially helically so as to extend continuously axially from one of the axial edges of the hooping reinforcement to an axially inner edge of the first axial portion, and
- the second axial portion comprises a second band wound circumferentially helically so as to extend continuously axially from an axially inner edge of the second axial portion to the other of the axial edges of the hooping reinforcement.
- the additional mass can easily be positioned in a portion located axially between the first and the second portions.
- the tread comprises one or more masses of one or more electrically conductive materials, the or each mass of electrically conductive material being arranged so as to ensure the electrical conductivity from the additional mass of electrically conductive material to the running surface via the or each mass.
- the tread is in contact with the additional mass so as to form the conductive path electrically connecting the additional mass and the running surface to one another.
- the tread comprises one or more masses of one or more electrically insulating materials and at least one mass of at least one electrically conductive material arranged so as to provide electrical conductivity from the additional mass of electrically conductive material to the running surface via the mass of electrically conductive material radially through the mass or masses of the electrically insulating material(s).
- the mass of the electrically conductive material is in contact with the additional mass and in contact with the running surface so as to form the conductive path electrically connecting the additional mass and the running surface to one another.
- the electrically conductive element comprises a layer made of an electrically conductive material.
- the layer may extend circumferentially over a length corresponding to an angle less than or equal to 360°. More preferably, the layer will extend circumferentially over a length corresponding to an angle less than or equal to 90° so as to limit the mass of the electrically conductive element.
- the electrically conductive material of the layer is an elastomeric material.
- the electrically conductive material of the layer is an electrically conductive ink.
- the electrically conductive element comprises an electrically conductive wire element, for example a monofilament or an assembly of monofilaments.
- the tire will comprise several separate conductive elements distributed regularly or irregularly over the circumference of the tire, regardless of the variant of the electrically conductive element described above.
- the hooping reinforcement is, optionally, axially delimited by two axial edges of the hooping reinforcement and comprises at least one circumferentially wound wired hooping reinforcement element helically so as to extend axially between the axial edges of the hooping reinforcement.
- the or each hooping wire reinforcement element extends, optionally, in a main direction forming, with the circumferential direction of the tire, an angle, in absolute value, less than or equal to 10°, preferably less than or equal to 7° and more preferably less than or equal to 5°.
- the electrically conductive element comprises first and second axial ends and extends axially from a first of the beads into the second of the beads passing radially between the working layer radially the outermost and the hooping reinforcement so that each first and second axial end is in contact:
- each first and second mass of electrically conductive material being in contact with the mounting support when the tire is mounted on the mounting support, or
- the electrically conductive element physically connects the first and second beads to each other.
- each first and second axial end is in contact with each first and second mass of electrically conductive material
- the conductive path passes through each first and second mass of electrically conductive material then through the electrically conductive element.
- each first and second axial end is in contact with the mounting support when the tire is mounted on the mounting support, the need for beads comprising masses of electrically conductive material is avoided. It will thus be possible to use beads comprising materials intended to be in contact with the mounting support which are electrically insulating and, for example, have low hysteresis.
- the electrically conductive element comprises first and second axial ends and extends axially from a first of the beads to radially between the radially outermost working layer and the shrink-fit reinforcement so that:
- the first axial end is in contact with a mass of an electrically conductive material of one of the first and second beads, this electrically conductive material being in contact with the mounting support when the tire is mounted on the mounting support, and the second axial end is arranged radially between the radially outermost working layer and the hooping reinforcement, or - the first axial end is in contact with the mounting support when the tire is mounted on the mounting support and the second axial end is arranged radially between the radially outermost working layer and the hooping reinforcement.
- the electrically conductive element of this second configuration does not physically connect the first and second beads to each other, which makes it possible to reduce the quantity of electrically conductive element to be used. It is possible to envisage a variant in which only one of the first and second beads is physically connected to the crown reinforcement by means of the electrically conductive element and a variant in which each first and second bead is mechanically connected to the reinforcement top via two separate conductive elements.
- the carcass reinforcement comprises a single carcass layer.
- the carcass reinforcement is, with the exception of the single carcass layer, devoid of any layer reinforced by wire reinforcement elements.
- the wire reinforcement elements of such reinforced layers excluded from the carcass reinforcement of the tire include metal wire reinforcement elements and textile wire reinforcement elements.
- the carcass reinforcement consists of the single carcass layer.
- the carcass reinforcement comprises two carcass layers.
- the main directions of the carcass wire reinforcement elements of the two carcass layers are preferably substantially parallel to each other.
- the carcass reinforcement comprises at least one carcass layer, the or each carcass layer being delimited axially by two axial edges of the or each carcass layer and comprises carcass wire reinforcement elements extending axially from one axial edge to the other axial edge of the or each layer of carcass.
- each carcass wire reinforcement element extends along a main direction of each carcass wire reinforcement element forming, with the circumferential direction of the tire, an angle substantially constant between each axial edge of the or each carcass layer and ranging, in absolute value, from 80° to 90°.
- each carcass wire reinforcement element extends in a main direction of each carcass wire reinforcement element forming , with the circumferential direction of the tire:
- This particular embodiment is advantageous because it makes it possible, during the tire manufacturing process, to easily incorporate the electrically conductive element when the assembly being formed still has a substantially cylindrical shape around the axis principal of the principal support of manufacture.
- - one arranges, around a main support having a substantially cylindrical shape around a main axis, at least one carcass assembly intended to form the carcass reinforcement,
- one arranges, radially outside the carcass assembly, at least one working assembly intended to form the working reinforcement, the carcass assembly and the working assembly forming an assembly of substantially cylindrical shape around of the main axis of the main support,
- the assembly of substantially cylindrical shape is deformed around the main axis of the main support so as to obtain an assembly of substantially toroidal shape around the main axis of the main support,
- At least one hooping assembly intended to form the hooping reinforcement is arranged radially outside the assembly of substantially toroidal shape around the main axis of the main support,
- the electrically conductive element is arranged radially outside the working assembly so that, subsequent to the step of arranging the hooping assembly, at least one so-called intercalated portion of the electrically conductive element is arranged radially between the working assembly and the hooping assembly.
- the working layer(s), the carcass layer(s), the materials in which the wire reinforcement elements are embedded are preferably elastomeric.
- elastomeric we mean a material exhibiting, in the crosslinked state, an elastomeric behavior.
- Such a material is advantageously obtained by crosslinking a composition comprising at least one elastomer and at least one other component.
- the composition comprising at least one elastomer and at least one other component comprises an elastomer, a crosslinking system and a filler.
- compositions used for these layers are conventional compositions for calendering reinforcements, typically based on natural rubber or another diene elastomer, a reinforcing filler, a vulcanization system and the usual additives.
- the adhesion between the wire reinforcing elements and the matrix in which they are embedded is ensured for example by a usual adhesive composition, for example an adhesive of the RFL type or equivalent adhesive.
- figure 1 is a view in section in a meridian section plane of a tire according to a first embodiment of the invention
- FIG. 2 is a schematic cut-away view of the tire of FIG. 1 illustrating the arrangement of the wire reinforcement elements in the crown
- FIG. 3 is a schematic view of the carcass wire reinforcement elements arranged in the sidewall of the tire of FIG. 1
- FIGS. Figures 17 and 18 illustrate steps of a method according to a second embodiment and are similar to Figures 13 and 14, and Figures 19 to 22 are views similar to that of Figure 1 of tires res respectively according to third, fourth, fifth and sixth embodiments.
- a mark X, Y, Z has been shown corresponding to the usual circumferential (X), axial (Y) and radial (Z) directions respectively of a tire.
- a mark x, y, z corresponding to the usual circumferential (x), axial (y) and radial (z) directions, respectively, of a main deformable manufacturing support between a substantially cylindrical shape and a toroidal shape around the y axis.
- FIG. 1 a tire, according to the invention and designated by the general reference 10.
- the tire 10 is substantially of revolution around an axis substantially parallel to the axial direction Y.
- the tire 10 is here intended for a passenger vehicle and has dimensions 245/45R18.
- the tire 10 is intended to be mounted on a mounting support, for example a rim.
- the tire 10 comprises a crown 12 comprising a tread 20 comprising a running surface 13 intended to come into contact with a road surface and a crown reinforcement 14 extending in the crown 12 in the circumferential direction X
- the crown reinforcement 14 and the tread 20 are arranged in contact with one another.
- the tire 10 also comprises a sealing layer 15 to an inflation gas intended to delimit an internal cavity closed with a mounting support of the tire 10 once the tire 10 is mounted on the mounting support, for example an electrically conductive metal rim. .
- the tread 20 comprises one or more masses of one or more electrically insulating materials.
- the tread 20 comprises a first mass 201 of a first electrically insulating material forming a tread layer and a second mass 202 of a second electrically insulating material forming a support layer for the tread layer.
- the support layer 202 also called underlayer, is arranged radially inside the running layer 201.
- Each first and second electrically insulating material is an electrically insulating elastomeric material, for example based on compositions as described in US20180066128, FR3059598 or even US6289958.
- the crown reinforcement 14 comprises a single working reinforcement 16 comprising at least one working layer 18 radially the outermost of the working reinforcement 16 and a single hooping reinforcement 17 comprising a single hooping layer 19.
- the working reinforcement 16 comprises a single working layer 18 and is, in this case, made up of the single working layer 18.
- the hooping reinforcement 17 consists of the hooping layer 19.
- the crown reinforcement 14 is surmounted radially by the tread 20.
- the hooping reinforcement 17, here the hooping layer 19, is arranged radially outside the working reinforcement 16 and is therefore radially interposed between the working reinforcement 16 and the tread 20.
- the hooping reinforcement 17 has an axial width that is smaller than the axial width of the working layer 18.
- the hooping reinforcement 17 is axially the less wide of the working layer 18 and of the reinforcement shrink fit 17.
- the tire 10 comprises two sidewalls 22 extending the crown 12 radially inwards.
- the tire 10 further comprises two beads 24 radially inside the sidewalls 22.
- Each sidewall 22 respectively connects each bead 24 to the crown 12.
- Each bead 24 comprises at least one circumferential reinforcing element 26, in this case a bead wire 28 radially surmounted by a mass 30 of stuffing.
- the tire 10 comprises a carcass reinforcement 32 anchored in each bead 24.
- the carcass reinforcement 32 extends in each sidewall 22 and in the crown 12 radially inside the crown reinforcement 14.
- the crown 14 is arranged radially between tread 20 and carcass reinforcement 32.
- the carcass reinforcement 32 comprises a carcass layer 34.
- the carcass reinforcement 32 comprises a single carcass layer 34, and in this case consists of the single carcass layer 34.
- the carcass reinforcement 32 is arranged directly radially in contact with the crown reinforcement 14.
- the crown reinforcement 14 is arranged directly radially in contact with the tread 20.
- the hooping reinforcement 17 and the working layer 18 are arranged directly radially in contact with each other.
- the hooping reinforcement 17, here the hooping layer 19, is delimited axially by two axial edges 17A, 17B of the hooping reinforcement 17.
- the hooping reinforcement 17 comprises several wire reinforcement elements hooping 170 circumferentially helically wound so as to extend axially between the axial edge 17A and the other axial edge 17B of the hooping layer 17 along a main direction D1 of each hooping wire reinforcement element 170.
- the main direction D1 forms, with the circumferential direction X of the tire 10, an angle AF, in absolute value, less than or equal to 10°, preferably less than or equal to 7° and more preferably less than or equal to 5°.
- AF -5°.
- the hooping reinforcement 17 comprises first and second axial portions 171, 172 axially separate from each other so that the first axial portion 171 comprises a first strip 173 wound circumferentially helically so as to extend continuously axially from the axial edge 17A of the hooping reinforcement 17 as far as an axially inner edge 171A of the first axial portion 171, and so that the second axial portion 172 comprises a second strip 174 wound circumferentially helically so as to extend continuously axially from an axially interior 172B of the second axial portion 172 as far as the axial edge 17B of the hooping reinforcement 17.
- the working layer 18 is delimited axially by two axial edges 18A, 18B of the working layer 18.
- the working layer 18 comprises working wire reinforcement elements 180 extending axially from the axial edge 18A to the other axial edge 18B of the working layer 18 substantially parallel to each other.
- Each wired working reinforcement element 180 extends along a main direction D2 of each wired working reinforcement element 180.
- the direction D2 forms, with the circumferential direction X of the tire 10, an angle AT, in absolute value, strictly greater at 10°, preferably ranging from 15° to 50°.
- AT -35°.
- the carcass layer 34 is delimited axially by two axial edges 34A, 34B of the carcass layer 34.
- the carcass layer 34 comprises carcass wire reinforcement elements 340 extending axially from the axial edge 34A to the another axial edge 34B of the carcass layer 34.
- the carcass layer 34 comprises an axially central portion 34S extending axially radially plumb with the working layer 18 and two axially lateral portions 34F extending axially between the portion axially central 34S and each axial edge 34A, 34B.
- Each axially lateral portion 34F is wound around each circumferential reinforcement element 26.
- Each axially lateral portion 34F comprises an inner axially lateral portion 38 arranged axially between the axially central portion 34S and each circumferential reinforcement element 26 as well as an axially lateral portion exterior 40 arranged axially between each circumferential reinforcing element 26 and each axial edge 34A, 34B of the carcass layer 34.
- the filler mass 30 is interposed between the inner and outer axially lateral portions 38, 40.
- Each carcass wire reinforcement element 340 extends along a main direction D3 of each carcass wire reinforcement element 340 forming, with the circumferential direction X of the tire 10, an angle ACS, in absolute value, strictly less than 80° in the axially central portion 34S of the carcass layer 34.
- the main direction D3 of each carcass wire reinforcement element 340 forms, with the circumferential direction X of the tire 10, an angle ACS, in absolute value, ranging from 50° to 75°.
- ACS +65°.
- the axially central portion 34S of the carcass layer 34 has a axial width equal to at least 40%, preferably at least 50% of the axial width L of the working layer 18 and equal to at most 90%, preferably at most 80% of the axial width L of the working layer 18 and in this case equal to 60% of the working layer 18.
- the median plane M of the tire 10 intersects this portion 34S. More preferably, this portion 34S is centered axially on the median plane M of the tire 10.
- each carcass wire reinforcement element 340 forms, with the circumferential direction X of the tire 10, an angle ACF, in absolute value, ranging from 80° to 90°. °, preferably from 85° to 90° and more preferably is substantially equal to 90° in each axially lateral portion 34F of the carcass layer 34 extending radially in each sidewall 22.
- ACF in absolute value
- Each portion 34F of the carcass layer 34 extending radially in each sidewall 22 has a radial height equal to at least 50% of the radial height H of the tire 10 and equal to at most 100% of the radial height H of the tire 10 and in this case equal to 95% of the radial height H of the tire 10.
- the equatorial circumferential plane E of the tire 10 intersects each portion 34F of the carcass layer 34 located in each sidewall 22.
- each hooping wire reinforcement 170 the main direction D2 of each working wire reinforcement element 180 and the main direction D3 of each carcass wire reinforcement element 340 form, with the circumferential direction X of the tire 10, in a portion PS' of the tire 10 comprised axially between the axial edges 17A, 17B of the hooping reinforcement 17, angles two by two different in absolute value.
- each portion PS, PS' of the tire 10 has an axial width equal to at least 40%, preferably at least 50% of the axial width L of the working layer 18 and equal to at most 90%, preferably at most 80% of the axial width L of the working layer 18 and in this case equal to 60% of the axial width L of the working layer 18
- the median plane M of the tire 10 intersects each portion PS, PS' of the tire 10. More preferably, each portion PS, PS' of the tire 10 is centered axially on the median plane M of the tire 10.
- Each working wire reinforcement element 180 is an assembly of two steel monofilaments each having a diameter equal to 0.30 mm, the two steel monofilaments being wound one with the other at a pitch of 14 mm.
- Each carcass wire reinforcement element 340 conventionally comprises two multifilament strands, each multifilament strand consisting of a yarn of polyester monofilaments, here of PET, these two multifilament strands being individually overtwisted at 240 turns per meter in one direction. then twisted together at 240 turns per meter in the opposite direction. These two multifilament strands are wound in a helix around each other. Each of these multifilament strands has a titer equal to 220 tex.
- Each hooping wire reinforcement element 170 is for example such as those described in WO2016/166056 A1.
- the tire 10 comprises an electrically conductive element 80 arranged so as to ensure electrical conductivity between the mounting support when the tire 10 is mounted on the mounting support and the crown 12 by the intermediate of the conductive element 80.
- the electrically conductive element 80 comprises first and second axial ends 80A, 80B (only the end 80A is illustrated in FIG.
- each first and second axial end 80A, 80B is in contact with the first and second masses 82 of electrically conductive materials respectively of each first and second bead 24, each first and second mass 82 of an electrically conductive material r being in contact with the mounting support when the tire 10 is mounted on the mounting support.
- the electrically conductive element 80 comprises a layer 84 consisting of an electrically conductive material, in this case consisting of an elastomeric material based on a composition as described for example in US2005/0103412.
- the electrically conductive element 80 here the layer 84, extends radially inside the equatorial circumferential plane E and is radially continuous between any point of the electrically conductive element 80 located radially inside the plane equatorial circumferential E, and any point of the electrically conductive element 80 located radially between the working layer 18 and the hooping reinforcement 17.
- the electrically conductive element 80 has the shape of a strip of width equal to 20 mm.
- the crown 12 is, for its part, arranged so as to ensure electrical conductivity from the electrically conductive element 80 to the rolling surface 13 radially through or via the hooping reinforcement 17 and through tread 20.
- the electrically conductive element 80 comprises at least one so-called interposed portion 801 which is radially arranged between the working layer 18 and the hooping reinforcement 17.
- the hooping reinforcement 17 is arranged so as to prevent electrical conductivity from the intercalated portion of the electrically conductive element 80 to the tread 20 via the hooping reinforcement 19.
- the hooping wire reinforcing elements 170 are embedded in an electrically insulating elastomeric material, in this case an elastomeric material based on a composition as described in US20180066128, FR3059598 or even US6289958.
- the working reinforcement 16 is arranged so as to prevent electrical conductivity via the working reinforcement 16.
- the wire reinforcement elements 180 of the working layer 18 are embedded in an electrically insulating material, in this case a material based on a composition as described in US20180066128, FR3059598 or even US6289958.
- the crown 12 comprises an additional mass 86 of an electrically conductive material arranged so as to provide electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to the tread 20 radially at the through the hooping reinforcement 17 via the additional mass 86 of electrically conductive material.
- the additional mass 86 is arranged radially between the tread 20 and the interposed portion 801 of the conductive electrical element 80 and axially arranged between the first and second axial portions 171 and 172 of the hooping reinforcement 17.
- the tread 20 comprises at least one mass 88 of at least one electrically conductive material.
- the masses 201, 202 and 88 are arranged so as to provide electrical conductivity from the additional mass 82 of the electrically conductive material to the running surface 13 via the mass 88 of the electrically conductive material radially through the masses. 201, 202 of electrically insulating materials. It will be noted that for reasons of simplification, the masses 86 and 88 are made of the same electrically conductive material.
- the tire 10 is obtained by a process which will be described with reference to FIGS. 4 to 16.
- a working assembly 50 and a carcass assembly 52 are manufactured by arranging the wire reinforcement elements 180 and 340 of each assembly 50 and 52 parallel to each other and by embedding them, for example by calendering, in a non-crosslinked composition comprising at least one elastomer, the composition being intended to form an elastomeric matrix once crosslinked.
- a so-called straight ply is obtained, in which the wire reinforcing elements are parallel to each other and are parallel to the main direction of the ply.
- portions of the straight working ply are cut at a cutting angle and these portions are butted together so as to obtain a so-called angled working ply, in which the working wire reinforcement elements are parallel to each other and form an angle with the main direction of the working ply equal to the cutting angle.
- portions of the straight carcass ply are cut perpendicular to the main direction of the straight carcass ply and these portions are butted together so as to obtain a so-called angled carcass ply.
- the carcass wire reinforcement elements are parallel to each other and form an angle ranging from 80° to 90° with the main direction of the carcass ply equal to the cut angle.
- a single working ply 49 and a single carcass ply 51 are obtained, the axial width of each of which, that is to say the dimension in a direction perpendicular to the longitudinal edges of each ply, is equal to the axial width respectively of each working assembly 50 and carcass 52 which will be formed subsequently.
- a sealing ply 70 is arranged around a main support 60 having a substantially cylindrical shape around its main axis A of so as to form a sealing assembly 72 intended to form the sealing layer 15.
- the sealing ply 70 is arranged by rolling up the sealing ply 70.
- each sidewall reinforcement assembly 73 and the assembly carcass 52 by winding respectively each sidewall reinforcement ply and the carcass ply 51 around the main support 60.
- two filler assemblies 74 are then arranged to form each filler mass 30.
- the two circumferential reinforcing elements 26 are arranged around the carcass assembly 52.
- each axial edge 52A, 52B of the carcass assembly 52 is turned axially inwards so as to cover each element radially. circumferential reinforcement 26 by each axial edge 52A, 52B of the carcass assembly 52 and that the carcass assembly 52 is wrapped axially around each circumferential reinforcement element 26.
- FIG. 7 a diagram illustrating the arrangement of the carcass wire reinforcement elements 340 at the end of the step of axial reversal of the axial edges 52A, 52B of the carcass assembly 52 around the circumferential reinforcement elements 26.
- the carcass assembly 52 is delimited axially by the two axial edges 52A, 52B and comprises the carcass wire reinforcement elements 340 extending substantially parallel to each other axially from the axial edge 52A to the other axial edge 52B of the carcass assembly 52.
- Each carcass wire reinforcement element 340 extends, in the carcass assembly 51, along a main direction K3 of each carcass wire reinforcement element 340 in the set of carcass 52.
- the main direction K3 forms, with the circumferential direction x of the main support 60, an initial angle A3 of each carcass wire reinforcement element 340 ranging, in absolute value, from 80° to 90°, preferably ranging from 85° to 90° and here substantially equal to 90°.
- Other angles A3 can be envisaged, such as for example the angles corresponding to the angles A3 described in the documents WO2016166056, WO2016166057, EP3489035.
- FIG. 9 a diagram similar to that of Figure 7 and illustrating the arrangement of wire reinforcement elements 340 carcass and wire reinforcement elements 180 work at the end of the step of formation of the working assembly 50.
- the working assembly 50 is delimited axially by two axial edges 50A, 50B of the working assembly 50 and comprises the working wire reinforcement elements 180 extending substantially parallel to each other other axially from the axial edge 50A to the other axial edge 50B of the working set 50.
- Each wired working reinforcement element 180 extends, in the working set 50, in a main direction K2 of each working element working wire reinforcement 180 in working set 50.
- the direction main K2 forms, with the circumferential direction x of the main support 60, an initial angle A2 of each working wire reinforcement element 180, in absolute value, ranging from 25° to 50°.
- A2 -39°.
- the carcass assembly 52 and the working assembly 50 then form an assembly 58 of substantially cylindrical shape around the main axis A of the main support 60.
- each support assembly 75 and each intermediate stuffing assembly 76 arranged radially outside the working assembly 50, each support assembly 75 and each intermediate stuffing assembly 76, the electrically conductive element 80.
- the electrically conductive element 80 is arranged by winding a layer of electrically conductive material over less than one turn, preferably by winding over less than a tenth of a turn.
- the electrically conductive element 80 extends axially from one intermediate stuffing assembly 76 to the other intermediate stuffing assembly 76 located on the other side of the median plane of the main support 60.
- an intermediate assembly 92 is formed on an intermediate support 91 of substantially toroidal shape around a main axis B of the intermediate support 91, an intermediate assembly 92 of which we will describe the manufacturing steps with reference to FIGS. 12 to 14.
- the intermediate assembly 92 comprises a hooping assembly 93 intended to form the hooping armature 17, the additional mass 86 of electrically conductive material as well as a bearing assembly 94 intended to form the tread 20.
- the hooping assembly 93 is arranged so as, once the tire 10 has been manufactured, to ensure electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to the strip bearing 20 radially through the hooping armature 17.
- the hooping assembly 93 is arranged so as to form first and second axial portions respectively referenced 931, 932 of the hooping assembly 93 axially separated on at least one axial portion 933 of the hooping assembly 93.
- Each first and second axial portion 931 and 932 of the hooping assembly 93 is respectively intended to form each first and second axial portion 171 and 172 of the armature shrinking 17.
- We form each first and second axial portion 931, 932 of the hooping assembly 93 by winding respectively the first and second strips 173, 174 separated from each other.
- the additional mass 86 of electrically conductive material is arranged axially between the first and second axial portions 931, 932 of the hooping assembly 93 so that, once the tire 10 has been manufactured, ensure electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to the tread 20 radially through the hooping reinforcement 17 via the additional mass 86 of electrically conductive material.
- the intermediate assembly 92 is formed by arranging a bearing assembly 94 intended to form the tread 20 radially outside the hooping assembly 93 and the additional mass 86.
- Bearing assembly 94 includes masses 201 and 202 of electrically insulating materials as well as mass 88 of electrically conductive material.
- the assembly 58 of substantially cylindrical shape previously manufactured is deformed so as to obtain 59 of substantially toroidal shape around the main axis A of the main support 60.
- the assembly 58 of substantially cylindrical shape is deformed around the main axis A of the support 60 so as to obtain the assembly 59 of substantially toroidal shape around the main axis A of the main support 60 so that, at the end of the deformation step, the main direction K3 of each carcass wire reinforcement element 340 forms, with the circumferential direction x of the main support 60, a final angle B3S of each element carcass wire reinforcement 340, in absolute value, strictly less than 80°, in an axially central portion 52S of the carcass assembly 52 extending axially radially plumb with the working assembly 50.
- B3S +65°.
- the portion 52S of the carcass assembly 52 is intended to form the axially central portion 34S of the carcass layer 34.
- the assembly 58 of substantially cylindrical shape is deformed around the main axis A of the main support 60 so as to obtain the assembly 59 of substantially toroidal shape around the main axis A of the main support 60 also so that, at the end of the deformation step, the main direction K3 of each carcass wire reinforcement element 340 forms, with the circumferential direction x of the support 60, a final angle B3F of each carcass wire reinforcement element 340 in two servings 52F of the carcass assembly 52 each extending axially between the axially central portion 52S and each axial edge 52A, 52B of the carcass assembly 52.
- Each axially lateral portion 52F of the carcass assembly 52 is intended in forming each axially lateral portion 34F of the carcass layer 34.
- B3F +90°.
- the assembly 58 of substantially cylindrical shape is deformed around the main axis A of the main support 60 so as to obtain the assembly 59 of substantially toroidal shape around the main axis A of the support 60 also so that , at the end of the deformation step, the main direction K2 of each working wire reinforcement element 340 forms, with the circumferential direction x of the support 60, a final angle B2 of each working wire reinforcement element 340, in absolute value, strictly greater than 10°.
- B2 -35°.
- the final angles B3S, B3F and B2 are substantially equal to the angles ACS, ACF and AT of the tire 10.
- the hooping assembly 93 is arranged radially outside the assembly 59 of substantially toroidal shape around the main axis A of the support. main 60.
- the intermediate assembly 92 is attached radially to the outside of the assembly 59 of substantially toroidal shape around the main axis A of the main support 60 so that the additional mass 86 is arranged radially outside and in contact with the interposed portion 801 of the conductive element 80.
- the additional mass 86 is arranged radially on the outside and in contact with the interposed portion 801 of the electrically conductive element 80 after the step of deforming the assembly 58.
- the bearing assembly 94 is arranged so as to, once the tire 10 has been manufactured, ensure electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to the tread surface 13 radially across or via the hooping reinforcement 17 and via the tread 20, here through the hooping reinforcement via the mass 86 and via the bearing 20 via mass 88.
- the green blank thus formed is molded and crosslinked so as to obtain the tire 10, for example by vulcanization in a mold.
- FIGS. 17 and 18 A tire according to a second embodiment will now be described with reference to FIGS. 17 and 18. Elements similar to those described in the first embodiment are designated by identical references.
- the hooping reinforcement 17 of the tire 10 comprises a single band 173 wound circumferentially helically so as to extend continuously axially from the axial edge 17A to at the edge 17B of the hooping reinforcement.
- each first and second axial portion 931, 932 of the hooping assembly 93 is formed by continuous winding of the single strip 173 and so that the first and second axial portions 931, 932 are axially separated on the axial portion 933 in order to ensure electrical conductivity through the hooping reinforcement 17 once the tire 10 has been manufactured.
- the bearing assembly 94 carries the additional mass 86 radially internally as shown in FIG. 18 and the intermediate assembly 92 is formed by arranging the assembly of bearing 94 intended to form the tread 20 as well as the additional mass 86 radially outside the hooping assembly 93.
- a tire according to a third embodiment will now be described with reference to FIG. 19. Elements similar to those described in the previous embodiments are designated by identical references.
- the masses 201, 202 of the tread 20 are masses of electrically conductive materials. Each mass 201, 202 of electrically conductive material is arranged so as to provide electrical conductivity from the additional mass 80 of electrically conductive material to the running surface 13 via the or each mass 201, 202. Also, the tread 20 does not include mass 88 of electrically conductive material, the latter being unnecessary to ensure electrical conductivity through the tread 20.
- a tire according to a fourth embodiment will now be described with reference to FIG. 20. Elements similar to those described in the preceding embodiments are designated by identical references.
- the hooping reinforcement 17 of the tire 10 according to the third embodiment is arranged so as to ensure electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to to the tread 20 via the hooping reinforcement 17.
- the hooping wire reinforcing elements 170 are embedded in an electrically conductive material.
- Such an electrically conductive material is for example identical to the material of the masses 86, 88 of the tire of the first embodiment.
- the tread comprises the masses 201, 202 of electrically insulating materials and the mass 88 of electrically conductive material arranged so as to ensure electrical conductivity from the hooping reinforcement 17 to 'to the running surface 13 via the mass 88 of electrically conductive material radially through the masses 201, 202 of electrically insulating materials.
- the process for manufacturing the tire 10 according to the third embodiment is such that the hooping assembly 93 is arranged radially outside and in contact with the electrically conductive element 80 so as to, once the tire 10 manufactured, ensure electrical conductivity from the interposed portion 801 of the electrically conductive element 80 to the tread 20 via the hooping reinforcement 17.
- a tire according to a fifth embodiment will now be described with reference to FIG. 21. Elements similar to those described in the previous embodiments are designated by identical references.
- each mass 201, 202 is arranged so as to ensure electrical conductivity from the hooping reinforcement 17 to the rolling surface 13 via each mass 201 ,
- each mass 201, 202 is made of an electrically conductive material identical to that of the third embodiment.
- the tire 10 according to the sixth embodiment is such that the working reinforcement 16 comprises a radially innermost working layer 18 and a radially outermost working layer 21 arranged radially outside the layer radially innermost layer 18.
- the radially outermost layer 21 is delimited axially by two axial edges 21A, 21B.
- the radially outermost working layer 21 comprises working wire reinforcement elements 210 extending axially from the axial 21 A to the other axial edge 21 B of the working layer 21 substantially parallel to each other.
- Each wired working reinforcement element 210 extends along a main direction D2' of each wired working reinforcement element 210.
- the direction D2' forms, with the circumferential direction X of the tire 10, an angle AT', in absolute value , strictly greater than 10°, preferably ranging from 15° to 50°.
- AT' is+26°.
- each carcass wire reinforcement element 340 extends along a main direction D3 of each carcass wire reinforcement element 340 forming, with the circumferential direction X of the tire 10 , a substantially constant angle AC, in absolute value, ranging from 80° to 90° between each axial edge 34A, 34B.
- AC is, in absolute value, substantially equal to 90°.
- the interposed portion is arranged between the radially outermost working layer of the working reinforcement and the hooping reinforcement.
- the invention can also be implemented without the carcass layer comprising an axially lateral portion wound around each circumferential reinforcing element 26. Indeed, other methods of anchoring the carcass layer 34 are possible, for example as described in US5702548.
- each first and second axial end 80A, 80B is in contact with the mounting support when the tire 10 is mounted on the mounting support.
- the electrically conductive element 80 extends axially from a first of the beads 24 to radially between the radially outermost working layer 18 and the hooping reinforcement 17 so that the first axial end 80A is in contact with the mass 82 of electrically conductive material and the second axial end 80B is arranged radially between the radially outermost working layer 18 and the hooping reinforcement 17.
- the first axial end 80A being in contact with the mounting support when the tire 10 is mounted on the mounting support and the second axial end 80B is radially arranged between the radially outermost working layer 18 and the shrinking reinforcement 17.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN202280013501.6A CN116802064A (zh) | 2021-02-08 | 2022-01-27 | 具有新型的传导通路的轮胎 |
US18/276,337 US20240123773A1 (en) | 2021-02-08 | 2022-01-27 | Tire having a novel conductive pathway |
EP22708578.4A EP4288297A1 (fr) | 2021-02-08 | 2022-01-27 | Pneumatique presentant un nouveau chemin conducteur |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FRFR2101165 | 2021-02-08 | ||
FR2101165A FR3119566A1 (fr) | 2021-02-08 | 2021-02-08 | Pneumatique presentant un nouveau chemin conducteur |
Publications (1)
Publication Number | Publication Date |
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WO2022167743A1 true WO2022167743A1 (fr) | 2022-08-11 |
Family
ID=75746811
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR2022/050152 WO2022167743A1 (fr) | 2021-02-08 | 2022-01-27 | Pneumatique presentant un nouveau chemin conducteur |
Country Status (5)
Country | Link |
---|---|
US (1) | US20240123773A1 (fr) |
EP (1) | EP4288297A1 (fr) |
CN (1) | CN116802064A (fr) |
FR (1) | FR3119566A1 (fr) |
WO (1) | WO2022167743A1 (fr) |
Citations (16)
Publication number | Priority date | Publication date | Assignee | Title |
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FR1413102A (fr) | 1964-05-14 | 1965-10-08 | Michelin & Cie | Perfectionnements aux enveloppes de pneumatiques |
US5702548A (en) | 1995-06-29 | 1997-12-30 | Sedepro | Tire having circumferential cables for anchoring the carcass |
FR2797213A1 (fr) | 1999-08-02 | 2001-02-09 | Michelin Soc Tech | Procede de fabrication d'un pneumatique avec preconformation d'une nappe de carcasse radiale pour rendre obliques les cables de la partie centrale |
US6289958B1 (en) | 1998-10-19 | 2001-09-18 | The Goodyear Tire & Rubber Company | Tire with tread containing electrically conductive stitched thread |
EP1526005A2 (fr) | 2003-10-23 | 2005-04-27 | The Goodyear Tire & Rubber Company | Bandage pneumatique comprenant un câblé électriquement conducteur entre un talon et la bande de roulement |
US20050103412A1 (en) | 2003-11-18 | 2005-05-19 | Zanzig David J. | Tire with rubber sidewall containing internal electrically conductive rubber strip |
EP1621365A1 (fr) | 2004-07-27 | 2006-02-01 | The Goodyear Tire & Rubber Company | Pneumatique avec un câblé éléctriquement conducteur s'étendant depuis la partie extérieure de la surface de montage sur la jante jusqu'à la partie intérieure de la bande de roulement |
JP2010159017A (ja) | 2009-01-09 | 2010-07-22 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
WO2016166056A1 (fr) | 2015-04-17 | 2016-10-20 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
WO2016166057A1 (fr) | 2015-04-17 | 2016-10-20 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
EP3196053A1 (fr) * | 2014-08-14 | 2017-07-26 | Sumitomo Rubber Industries, Ltd. | Pneumatique |
US20180066128A1 (en) | 2016-09-06 | 2018-03-08 | The Goodyear Tire & Rubber Company | Rubber composition for promoting electrical conductivity, and tire with component |
FR3059598A1 (fr) | 2016-12-05 | 2018-06-08 | Compagnie Generale Des Etablissements Michelin | Pneumatique comportant une armature de sommet allegee |
JP6354429B2 (ja) * | 2014-07-31 | 2018-07-11 | 横浜ゴム株式会社 | 空気入りタイヤ |
DE102017211752A1 (de) * | 2017-07-10 | 2019-01-10 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen |
EP3489035A1 (fr) | 2017-11-27 | 2019-05-29 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
Family Cites Families (1)
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JP7002314B2 (ja) * | 2017-12-13 | 2022-02-10 | 株式会社ブリヂストン | 空気入りタイヤ |
-
2021
- 2021-02-08 FR FR2101165A patent/FR3119566A1/fr active Pending
-
2022
- 2022-01-27 EP EP22708578.4A patent/EP4288297A1/fr active Pending
- 2022-01-27 WO PCT/FR2022/050152 patent/WO2022167743A1/fr active Application Filing
- 2022-01-27 US US18/276,337 patent/US20240123773A1/en active Pending
- 2022-01-27 CN CN202280013501.6A patent/CN116802064A/zh active Pending
Patent Citations (16)
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FR1413102A (fr) | 1964-05-14 | 1965-10-08 | Michelin & Cie | Perfectionnements aux enveloppes de pneumatiques |
US5702548A (en) | 1995-06-29 | 1997-12-30 | Sedepro | Tire having circumferential cables for anchoring the carcass |
US6289958B1 (en) | 1998-10-19 | 2001-09-18 | The Goodyear Tire & Rubber Company | Tire with tread containing electrically conductive stitched thread |
FR2797213A1 (fr) | 1999-08-02 | 2001-02-09 | Michelin Soc Tech | Procede de fabrication d'un pneumatique avec preconformation d'une nappe de carcasse radiale pour rendre obliques les cables de la partie centrale |
EP1526005A2 (fr) | 2003-10-23 | 2005-04-27 | The Goodyear Tire & Rubber Company | Bandage pneumatique comprenant un câblé électriquement conducteur entre un talon et la bande de roulement |
US20050103412A1 (en) | 2003-11-18 | 2005-05-19 | Zanzig David J. | Tire with rubber sidewall containing internal electrically conductive rubber strip |
EP1621365A1 (fr) | 2004-07-27 | 2006-02-01 | The Goodyear Tire & Rubber Company | Pneumatique avec un câblé éléctriquement conducteur s'étendant depuis la partie extérieure de la surface de montage sur la jante jusqu'à la partie intérieure de la bande de roulement |
JP2010159017A (ja) | 2009-01-09 | 2010-07-22 | Sumitomo Rubber Ind Ltd | 空気入りタイヤ |
JP6354429B2 (ja) * | 2014-07-31 | 2018-07-11 | 横浜ゴム株式会社 | 空気入りタイヤ |
EP3196053A1 (fr) * | 2014-08-14 | 2017-07-26 | Sumitomo Rubber Industries, Ltd. | Pneumatique |
WO2016166056A1 (fr) | 2015-04-17 | 2016-10-20 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
WO2016166057A1 (fr) | 2015-04-17 | 2016-10-20 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
US20180066128A1 (en) | 2016-09-06 | 2018-03-08 | The Goodyear Tire & Rubber Company | Rubber composition for promoting electrical conductivity, and tire with component |
FR3059598A1 (fr) | 2016-12-05 | 2018-06-08 | Compagnie Generale Des Etablissements Michelin | Pneumatique comportant une armature de sommet allegee |
DE102017211752A1 (de) * | 2017-07-10 | 2019-01-10 | Continental Reifen Deutschland Gmbh | Fahrzeugluftreifen |
EP3489035A1 (fr) | 2017-11-27 | 2019-05-29 | Compagnie Generale Des Etablissements Michelin | Armature de renforcement de pneumatique |
Also Published As
Publication number | Publication date |
---|---|
EP4288297A1 (fr) | 2023-12-13 |
US20240123773A1 (en) | 2024-04-18 |
CN116802064A (zh) | 2023-09-22 |
FR3119566A1 (fr) | 2022-08-12 |
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