CN1207160C - Runflat tyre having optimized carcass path - Google Patents

Runflat tyre having optimized carcass path Download PDF

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Publication number
CN1207160C
CN1207160C CNB998111481A CN99811148A CN1207160C CN 1207160 C CN1207160 C CN 1207160C CN B998111481 A CNB998111481 A CN B998111481A CN 99811148 A CN99811148 A CN 99811148A CN 1207160 C CN1207160 C CN 1207160C
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CN
China
Prior art keywords
tire
carcass
point
tyre bead
axial
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Expired - Fee Related
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CNB998111481A
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Chinese (zh)
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CN1319053A (en
Inventor
R·C·科特雷尔
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Michelin Recherche et Technique SA Switzerland
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Michelin Recherche et Technique SA Switzerland
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    • 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
    • B60C9/02—Carcasses
    • 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
    • B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
    • B60C15/0018—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion not folded around the bead core, e.g. floating or down ply
    • 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
    • B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
    • B60C17/0009—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts
    • B60C17/0018—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor comprising sidewall rubber inserts, e.g. crescent shaped inserts two or more inserts in each sidewall portion
    • 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
    • B60C3/00—Tyres characterised by the transverse section
    • B60C3/04—Tyres characterised by the transverse section characterised by the relative dimensions of the section, e.g. low profile

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

Abstract

An outermost layer tyre cover of a tyre related in the present invention is provided with an optimized channel designed for optimizing the tensile stress range of the side wall of the tyre and that of the tyre bead to a maximal extent. The present invention also provides an independent reinforcing structure at the tyre bead, the independent reinforcing structure can fix a single tyre cover or a plurality of tyre covers to the tyre bead and can maintain the tyre bead on the assembly wheel rim in the running process in the gas leakage state, and simultaneously, the fixed reinforcing member also simplifies the process of the servicing and the maintenance of the contour of the tyre cover.

Description

Has the Runflat tire that improves the carcass passage
Technical field
The present invention relates to a kind of tire, particularly a kind of air-inflation tyre that can under the situation of gas leakage, continue its manoevreability.
Background technology
At gas filed Runflat tire, multiple different Tyre structure has been proposed here, that this tire can be full of cruising under the state of gas but also can allow to realize under the state in a kind of gas leakage certain limited travelling.The structure of this tire normally by one or more around be arranged on that one or more bead metal filaments on each bead radially dig carcass constituted.In order to reach the manoevreability of expection under the situation of travelling in gas leakage, also used side wall construction in many such tires, it all is by being reinforced and thickening inserting additional elastomeric material layer between the body piles or between body piles and inner layer of tire embolus.The example of in Fig. 1, having represented a this tire.
Making one, to leak gas that the tire that travels can remain secured on this wheel rim also be no less important.The solution of many kinds was once proposed, comprising mechanical bead locking device is arranged, special rim contour or the bead wire bundle of elongating cross-sectional plane is arranged.On shown in Fig. 1 in a kind of situation, the bead wire bundle of this elongation has played simultaneously this carcass is fixed on this bead with opposing and has resulted from the tensile force in the carcass and bead remained on effect on this wheel rim in the gas leakage driving process.Coordination in design process between these two kinds of performances is very necessary.
Tire with carcass of digging around the bead metal filament must have an interruption at the radially topmost boundary of digging part of its one or more carcasses.When this digs part when being arranged at axis outside of this tire transversal surface vertically, this tire dig the state that part is placed in a kind of compressing stress, make this bead partly produce distortion.This state of stress and above-mentioned interruption are coordinated the performance need of tire between inflation and gas leakage state, caused structure Design to be restricted.
Apply for the 5th of artificial Aura (Oare) etc., the 5th, 511 of 263, No. 526 US Patent and the artificial Mary Willard of application (Willard), No. 599 US Patent has all related to the gas leakage traveling tire that has the multilayer carcass, wherein has at least one deck carcass to dig around the bead metal filament.Oare etc. disclose a kind of two tires of reinforcing carcasses that have, and they all are to dig around the metal filament of this bead, at least one carcass dig the equatorial circle place that part has radially extended to tire, and this lower sidewall portion includes the consolidating layer of multilayer.In context, phrase " tire equator circle " has defined with respect to the radial position that axial boundary maximum width points or this outside tires surface is arranged.Willard discloses a kind of tire that three layers of tire line are reinforced carcass that has, wherein the ground floor carcass is at the inner boundary that axially upwards ends at this bead with the footpath, and second layer carcass is dug around bead and overlapped on the 3rd body piles vertically in the outside of lower wall.It is because the position in the axial direction, the outside of bead structure that two pieces of documents all do not have to eliminate at the compression effort of digging part.Conclusion is that the geom arrangement and the mounting means in the bead zone of product must have the durability that can be adapted to on-cycle stretching-compressing stress.Like this, which tire can be broken away from these restrictions in design, and then it just can better adapt to the overall process of inflation of tire and gas leakage form simultaneously.
Summary of the invention
Tire among the present invention has the outermost layer carcass passage of a uniqueness, and its design is that the tensile stress limit for the sidewall that can make tire and bead part reaches maximum.The present invention also provides one to be used for that single or multiple carcasses are fixed in the bead partial sum and to be used at the gas leakage driving process bead being remained on bead part on the wheel rim.And described carcass anchor fitting has been simplified the maintenance to the appearance profile of described carcass simultaneously.
Tire beads place involved in the present invention includes at least one axial outermost layer carcass that is fixed in each side of tire, this bead has a base, it is used to be installed in the assembling wheel rim of tire design, each bead all radially extends upward by a sidewall sections, and wherein this sidewall sections and a tread portion join.
With respect to tire axial innermost layer surface and axially the midway location between the outermost surface the formed track definition of some reference wheel profile in the middle of,
One wheel rim R point R on described bead is defined as having one and is equivalent to half axial coordinate and of normal width and is equivalent to assemble half radial coordinates of wheel rim normal diameter,
One bead R point Z is defined within the tire outermost surface and a radial coordinates from wheel rim R point R outwards is offset on the horizontal point of crossing of a segment distance,
One tyre surface R point N is defined within on the outermost surface of tire, in the junction of tread of tyre and sidewall sections,
One sidewall R point P is defined within the outermost surface place of lower tire side wall, and between R point Z and N;
Wherein said at least one axial outermost layer carcass corresponding to the radial position between described sidewall R point P and described tyre surface R point N, is arranged at the outside of described middle reference wheel profile vertically,
Wherein said at least one axial outermost layer carcass and described middle reference wheel profile intersect at 1 Q, described some Q has a radial position between described R point Z and described R point P, and corresponding to be set to vertically with this carcass of interior radial position at described some Q thereupon described in the middle of the inboard of reference wheel profile;
Wherein corresponding to each at described sidewall R point P with interior radial position, each axial coordinate of described at least one axial outermost layer carcass all has a corresponding monodrome radial coordinates,
And described tire also includes one and is used for the first bead reinforcing member and that described at least one carcass is fixed on the bead is used to assemble the second bead reinforcing member that confining force is provided to bead on the wheel rim in the gas leakage driving process.
The present invention is a carcass passage of having introduced a uniqueness descriptively, it is defined like this, wherein have an axial outermost layer carcass at least, it is at first from a tread portion and lower tire side wall junction partly, pass through the outside of the midway location between tire innermost layer and the outermost layer vertically, pass through the inside of this breast wheel profile again, finally reach point specific on the bead.After this manner, in the scope that spreads all over lower tire side wall and bead part, axially the drawing stress in the outermost layer carcass is maximized on degree.Carcass of the present invention is fixed on the bead by reinforcing member, this reinforcing member at the edge that has defined carcass on the side so that can resist the pressure that carcass produced in the inflation of vehicle or the driving process of gas leakage.This carcass is fixed in reinforcing member on the bead, and it includes the tire line that is in the nature circumference guiding or other the reinforcing member that not necessarily has the tire line.Compare with the tire that trends towards only using under the gas leakage state of routine, this tire trends towards utilizing additional design constraint to extend gas leakage and travels to guarantee the confining force of bead on the assembling wheel rim in the middle of the gas leakage driving process.The present invention has introduced a kind of second bead reinforcing member, it is arranged at the outside of this carcass vertically, this carcass is being fixed a reinforcing member that the regulation geometric position is arranged, in the middle of the gas leakage driving process, providing a suitable confining force, and allow tire have on the wheel rim of nominal contour simultaneously to have the installation simplification one to the bead of assembling on the wheel rim.Bead confining force reinforcing member among the present invention can include any material that is suitable for going to resist stress and temperature traverse in the vehicle ' process, for example circumference guiding tire line or filament, metal cable, elastomeric material, fiber reinforced resinous substrates and equivalent thereof.
In most preferred embodiment of the present invention, tire has the carcass reinforced of the tire line of radially-directed independently, it has a passage and bead and is suitable for tire thickness axis at the lower tire side wall place, make the bead part of sidewall and carcass obtain maximization on extent and scope, this carcass can keep suitable pressure in inflation or gas leakage driving process.One or more meniscate fastening elements are set on the lower tire side wall between carcass and the tire axial innermost surface, make operating effort and the operational torque that in gas leakage driving process tire can support unit.For fixing carcass at each bead place, on at least one side surface, this carcass is delimitd a boundary line by at least one coil that is made of tire line of circumference guiding in the axial direction, and this tire line is incorporated in the carcass fixedly among the elastomeric material layer between the tire line that places carcass and circumference guiding.One bead confining force reinforcing member is positioned at the fixedly outside of reinforcing member of this carcass and carcass vertically.An elastomeric bead filling member is disposed radially in the outside of bead confining force reinforcing member, and vertically between this carcass and tire axial outermost surface.
In the second embodiment of the present invention, tire has at least two carcasses, and first carcass is set at the outside of second carcass vertically and radially.The passage of the outermost layer carcass that is consistent with pulling force makes the outline line in the most preferred embodiment obtain optimization.This embodiment has at least two meniscate fastening elements, and wherein first is arranged between first and second body piless, and second is arranged at second body piles and tire radially between the surface of innermost layer.In the bead part, this two-layer carcass can have a common circumference lubber-line, also can advance along the circumference lubber-line at contiguous place.Carcass is fixed on the bead by the coil that is in the nature circumference guiding tire line, and this tire line delimited the boundary of carcass separately vertically.As among first embodiment, a bead reinforcing member and an elastomeric bead filled rubber material have been used here.
In the third embodiment of the present invention, this tire has at least three carcasses, and first carcass is set at the outermost layer of the second and the 3rd carcass vertically and radially, and the 3rd carcass is set at the inboard of second carcass in the axial direction.What meet a force value is that the passage of outermost carcass makes similar in appearance to the outline line of this most preferred embodiment and is optimized at least.This embodiment has at least three meniscate fastening elements, and first element places between first and second body piless, and second element places between the second and the 3rd body piles, and the 3rd element places the 3rd body piles and tire radially between the surface, innermost layer.These carcasses are fixed on the bead by the coil that the tire line that is in the nature the circumference guiding constitutes by at least one, and these tire lines have defined the edge of carcass respectively vertically.In the present embodiment, this second and the 3rd carcass has a common circumference lubber-line in the bead zone, and the tire line consistency of the second and the 3rd body piles is less than first body piles.As selection, any one in three body piless can only be advanced along the circumference lubber-line in proximity, and wherein the tire line consistency of each body piles is respectively independently.As first embodiment, a bead reinforcing member and an elastomeric bead filled rubber material have been used here.
Description of drawings
Fig. 1 is the part sectional view of a reference data tire, and it is along cutting open by the meridian plane of rotating shaft.
Fig. 2 be one with the part sectional view of the corresponding gas leakage traveling tire of most preferred embodiment of the present invention, it is along cutting open by the meridian plane of rotating shaft.
Fig. 3 a be one with the part sectional view of the corresponding gas leakage traveling tire of most preferred embodiment of the present invention, it is along cutting open by the meridian plane of rotating shaft.For the sake of clarity, some tire parts are deleted from drawing.
Fig. 3 b is an enlarged view of tire represented among Fig. 3 a, and it has shown the details at the carcass profile of this lower tire side wall part.For the sake of clarity, some tire parts are deleted from drawing.
Fig. 3 c is an enlarged view of tire represented among Fig. 3 a, and it has shown the details at the carcass profile of this tire lower sidewall portion and bead part.For the sake of clarity, some tire parts are deleted from drawing.
Fig. 4 is the enlarged view of the lower wall and the bead part of a gas leakage traveling tire of the present invention, and it is that the edge is cut open by the meridian plane of rotating shaft, and has shown the configuring condition of elasticity bead filling thing.
Fig. 5 a be one with the part sectional view of the corresponding gas leakage traveling tire of second embodiment of the invention, it is along cutting open by the meridian plane of rotating shaft, and has the carcasses of two alignment one common annulars on tyre bead.
Fig. 5 b be one with the part sectional view of the bead of the corresponding gas leakage traveling tire of second embodiment of the invention part, it is along cutting open by the meridian plane of rotating shaft, and has two carcasses that have common circumferential alignment on its bead.
Fig. 6 be one with the part sectional view of the corresponding gas leakage traveling tire of third embodiment of the invention, it is along cutting open by the meridian plane of rotating shaft, and has three carcasses.
Fig. 7 be one with the enlarged perspective of the bead of the corresponding gas leakage traveling tire of third embodiment of the invention part, it has shown that this second and the 3rd carcass lays the common circumferential position of layer.
The specific embodiment
When the tire on being assemblied in wheel rim supported on the ground fully loadedly, in the driving process of tire, particularly in the process that gas leakage is travelled, it need stand distortion, this increase or reduced the pressure that results from the carcass.Under the situation of conventional design, dig or when one or more carcass was provided with vertically, metaboly mentioned above all can make this carcass enter a state with compressing stress at carcass no matter be.This state with compressing stress might be to come across when a carcass side is set at neutral axis of bending in the carcass structure and the optional position between the neutral axis curvature initial point.On the contrary, one is provided with and can yields to from the carcass side that neutral axis and its curvature initial point are outwards arranged diametrically the pressure that has increased vertically deformation process.Common be used for material that tire carcass reinforces for the resistivity of circulation tensile stress generally greater than resistivity to the circulation compression effort.With reference to the tire 20 shown in the figure 1, under steam, and particularly in the gas leakage driving process, the distortion of this tire can make carcass partly yield to compression effort at this tire upper side wall, at least be carcass 12 places in the innermost layer, or in the A lower side wall portion office of outermost layer carcass 10, or dig the part place at one second carcass 11.The minimizing of the endless belt of these compression efforts can increase the durability of tire, particularly in the middle of the gas leakage driving process.As selection, the minimizing of these compression effort endless belt makes the utilization of carcass reinforcement material become possibility, and this material helps using under pressure, and has and can improve tyre performance and reduce potential benefit such as tire quality.
Tire shown in the present has a kind of distribution form that compression effort in the carcass is lowered with respect to the gas leakage of the routine layout that travels.This effect realizes by being provided with an outermost layer carcass passage, and it makes the distortion of tire under load carrying ability trend towards the pressure that sidewall and bead at this tire partly increase carcass.This kind result's realization is to the fixing not infringement of carcass at the bead place.This outermost layer carcass passage is in the side wall portion office, and carcass is arranged at vertically is positioned at the outer meridian plane place of neutral bending axis line, and partly locates at bead, and carcass is arranged at vertically to be positioned in the neutral bending axis line.In the position near this sidewall and bead junction partly, this carcass side and neutral bending axis line intersect.This point of crossing is corresponding at position and curve transition endless belt axial and radially.From the radially outside side wall portion office of this transition endless belt, the tire of deflection trends towards increasing further the curvature of this body piles.Partly, be forced to bending because this bead partly assembles the influence of rim side, so that the curvature of body piles increases again from the radially inside lower wall of this transition endless belt and bead.
Tire among the present invention also further provides an independent structures for carcass being fixed in this bead and this bead being remained on the wheel rim.The unique bead structure of among the present invention this has given the tire layout designer with bigger design flexibility, make it can guarantee that all carcasses can both have passage in the bead zone, it is provided with vertically and is positioned at from neutral axis inwardly as far as possible at a distance, but simultaneously, this carcass has bead structure, and it can make bead that enough confining forces be arranged on wheel rim in the gas leakage driving process.
Fig. 2 has represented tire constructed in accordance 100.In the embodiment shown in Figure 2, tire 100 is a kind of passenger tyres, and it has one and ends in shoulder at the lateral edges place of tread portion and divide 105 the tread portion that combines with ground 101.Sidewall sections 106 divides 105 radially to extend to bead part 107 from shoulder.Tire 100 also further has a carcass 110, and it extends to this bead part 107 from tread portion 101 through sidewall sections 106.Carcass 110 is in the nature the tire line of radially-directed and reinforces, regenerated fiber for example, and polyester, iron and steel, aromatic poly amide or any other are suitable for the material as the tire carcass strengthening agent.The carcass strengthening agent has the highest modulus in tension, and for example iron and steel or aromatic poly amide just are suitable for making the tire with individual layer carcass.These materials are suitable for any one embodiment disclosed herein.Tire 100 can comprise that the internal layer liner of a routine or other are used to constitute the material on internal layer surface 108 of the tire of opposing air diffusion.In carcass 110 outsides and along warp-wise setting and inboard and what be disposed radially is a tyre surface ruggedized construction at tread portion 101.In the embodiment shown in Figure 2, this tyre surface ruggedized construction comprises the shoestring 103 and 104 that at least two tire lines are reinforced, and it has some with a tire line with respect to the angle orientation of periphery in this tire.Tire line ruggedized construction in this shoestring 103 on the direction positioning relation with shoestring 104 antithesis, they might not be with same angle tilt orientation.The one tyre surface ruggedized construction 102 that is at least the 3rd layer radially is arranged at the outside of shoestring 103, and is the tire line reinforcing of circumference orientation by essence.
The radially innermost layer of carcass 110 ends in bead part 107, and does not dig around bead heart yearn or other bead ruggedized construction.That is to say that axial coordinate of each definition carcass 110 appearance profile all has a unique radial position, each radial position is all less than the equatorial circle of tire.Carcass 110 is fixed on the bead part 107 by the coiled wire-wound coil of at least one circumferencial direction, and this coil is made of the tire line 141 or 142 that leads in a circumferential direction, and they have defined the border, side of carcass 110 at least in a side.Here " fix " at bead and mean that partly tire line coil 141 or 142 resists the pressure that results from carcass 110 in the middle of inflation of tire or disappointing driving process, it is by being adhered on the reinforcing tire line of this carcass side with tire line coil, rather than it is wrapped on the conventional bead heart yearn.Other the selectable carcass fixed sturcture or the arrangement form of bead part body piles all disclose in the application people is the 5th, 660, No. 656 US Patent of Herbelleauu etc., and it can be hereby expressly incorporated by reference.In order in the inflation of tire and the driving process that leaks gas, bead to be remained on the fitting of tire wheel rim outside that coil 145 has been arranged in carcass 110 vertically of supplying that is in the nature along the circumference guiding.In the embodiment shown in Figure 2, sidewall sections 106 also includes three meniscate fastening elements 131,132 and 133, and they are arranged between carcass 110 and the tire innermost surface 108 vertically.Meniscate fastening element 131,132 and 133 can be made up of identical or different rubber constituent, but this coefficient of elasticity is preferably between about 8Mpa and the 14Mpa.If use the same rubber constituent, then tire 100 will only have an independent crescent fastening element (not shown).For at this open properties of materials, elastomeric modulus promptly refers to the elastic stretching modulus that prolongs with 10%.
With reference to the partial view of lower tire side wall shown in Fig. 3 a, 3b and the 3c and bead part, describe the first-selected passage of carcass 110 now in detail.Disclosed as the front, when carcass was arranged on the surface of the neutral bending axis in this carcass structure, the drawing stress of carcass can reach at utmost.On this surface, be meant the initial point of the radius of curvature of this neutral axis.Owing to will at length be described to the carcass track, count a middle reference wheel profile 150 approximately in this position with neutral axis of bending, it is to be made of the track that the intermediate point between tire innermost surface and the outermost surface forms.
Three R point N, Z and P on tire 100 outermost surfaces in Fig. 3 a, 3b and 3c, have been represented to be positioned at.One the 4th R point Q has defined the point of crossing of carcass profile 110 and reference contours 150 from function.Wucan examination point R has defined a wheel rim R point as the function between standard rim width W and the standard rim diameter D.Wheel rim R point R has one from the axial coordinate W/2 of tire equator planar survey and one the radial coordinates D/2 that measures of the rotation axis of the tire shown in Fig. 1 freely.The locus of R point N, Z, P and R be at mounting of tyre on wheel rim and be inflated to the Ohioan Puli of section tire and wheel rim association (Tire and RimAssociation of Copley Ohio) defines the force value of defined the time.Tyre surface R point N is positioned the junction point between the sidewall sections of tyre surface and tire 100.Tyre surface R point N is in that axially and directly upwards to be defined as being positioned at outermost surface with tire tangent and become with horizontal surface on the straight line at 30 ° of angles.Referring now to accompanying drawing 3c, bead R point Z is defined within the axial outermost border of tire 100 and the standard radius of self-assembly wheel rim radially has been offset H zOn the horizontal intersection point of distance.The radial position of bead R point Z is defined as radially outwards estimating from the radially outermost border of rim the clearance distance of regulating an about 5mm to 7mm.Therefore, stipulating under the rim contour situation by Tire and Rim Assicuation " J ", promptly its defined the rim height be 17.5mm+/-during 1mm, side-play amount H zDistance should be about 21.5mm to 25.5mm.By the details on this tire design layout of representing in the accompanying drawing as seen, R point Z is corresponding to the outermost surface that is partly protruded by lower tire side wall and the bead joining of the recessed outline line summit that constitutes partly.Curve distance between R point Z and the R point N has defined the length L of sidewall sections 106.
Sidewall R point P is positioned the sidewall sections 106 on the middle endless belt between bead R point Z and the tyre surface R point N.As shown in Figure 2, the thickness of sidewall sections 106 and the location of carcass 110 on sidewall all are unmodifieds with respect to this endless belt.Sidewall R point P be from bead R point Z dislocation one section prolong the curve distance A that this tire outermost layer is measured, and curve distance A generally is in roughly between 45% to 65% of integral side walls length L.At R point P place, tire 100 has an axial thickness t p, carcass 110 have one from outer surface of tire inwardly measure vertically axial location t 2, make t 2≤ t p/ 2, and t preferably 2Roughly be equivalent to t p8% to 25%.Has an axial thickness t at bead R point Z place tire 100 z, carcass 110 have one from outer surface of tire inwardly measure vertically axial location t 3, make t 3〉=t z/ 2.Preferably roughly be equivalent to axial width t z60% to 80%.At wheel rim R point R place, tire 100 has an axial thickness t B, carcass 110 have one from the tire outermost surface inwardly measure vertically an axial location t 1, make t 1〉=t B/ 2.T preferably 1Be roughly the bead thickness t B55% to 85%.
When a tire in the middle of the load-carrying driving process deflection took place, when deflection particularly took place in gas leakage is travelled significantly, the deformation energy of bead and lower sidewall portion was controlled by the mutual action of tire construction and rim.From the far place of wheel rim, the distortion of tire is controlled by the bending of sidewall sections diametrically.R point Q has defined the point of transition of this dual mode.The location of R point Q is carcass 110 axial location t corresponding to wheel rim R point Z on endless belt 3Function.With reference to accompanying drawing 3c, R point Q is positioned at meridian plane reference wheel profile 150 and has a radius R zThe point of crossing place of circular arc 160, and the initial point of this circular arc is positioned at wheel rim R point Z place.Radius R zGenerally roughly be t 390% to 120%, R wherein zT preferably 3100%.Element in the carcass passage 110 has been described fully.
The simplification that wheel rim is assemblied in confining force on the wheel rim and assembling depends on and is arranged at the fixedly performance of the wheel rim confining force reinforcing member 145 in reinforcing member 141 and/or 142 outsides of carcass vertically, has represented reinforcing member 141,142 in Fig. 3 in the enlarged view of rim section.In this embodiment, wheel rim confining force reinforcing member 145 is made up of at least one coil, and coil is to be made of the tire line along the circumference orientation of imbedding elastomeric material in essence.Have the iron and steel drag-line of imbedding elastomeric material in the embodiment of this manufacturing tire, this rubber mix material preferably has Xiao's formula A level hardness greater than 70 in this case.Yet, impliedly used other reinforcement material among the present invention, as the steel members of closely being tied up, elastomeric material, or, imbed carbon or aromatic poly amide fiber optic materials in the thermoplastic or thermosetting resin material as selecting.
Be positioned in the rim section 107 and for sidewall 106 radially in the resilient infill 134 of layer segment be arranged at the outside of carcass 110 vertically, as shown in Figure 4.This filling member 134 keeps the exterior boundary of reinforcing member 145 upwards radially to extend until sidewall 106, and reduce gradually on the axial cross section width from wheel rim.This filling member 134 radially extends to the above H of wheel rim R point 1Distance.H 1Preferably be equivalent to 130% to 170% of radial distance between wheel rim R point R and the R point Q.H in this embodiment 1Preferably between wheel rim R point R and the R point Q 150% of radial distance.Wheel rim filling member 134 is to have roughly by one that the elastomeric material of 60Mpa coefficient of elasticity constitutes, and can include the reinforcing member of imbedding in the artificial rubber that replenishes.
In second embodiment of the invention, shown in accompanying drawing 5a, tire 200 comprises at least two carcasses 210 and 211.Carcass 210 has a passage identical with the carcass 110 of tire 100 described in the first embodiment of the invention.Second carcass 211 axially is arranged at the inboard of first carcass 210 and is had an orbit wheel profile that roughly is positioned in the middle of carcass 210 and the tire inner surface 208 on sidewall 206.The outline line that the observation of accompanying drawing 5a is demonstrated second carcass 211 on the sidewall sections 206 is roughly upwards consistent in the axis of the tire 200 of the upper side wall part in the R point P outside with the footpath.One first crescent fastening element 231 is arranged between first carcass 210 and second carcass 211, and one second crescent fastening element 232 is arranged between second carcass 211 and the surface, tire innermost layer 208.At the radially innermost layer of bead part 207 boundary, second carcass 211 has the circumferential calibration of the vicinity of one and first carcass 210.Carcass 210 and 211 is fixed on the bead place by the first, the second and tertiary winding in the circumference tire line fastening element 241,242 and 243 respectively in the present embodiment.Shown in accompanying drawing 5a, the coil in these circumference tire line fastening elements is provided with respect to carcass 210 and 211 vertically.Have the confining force of improvement and the simplification in when assembling in order to ensure bead on wheel rim, a bead confining force fastening element 245 is arranged at the outside of consolidate coil 242 vertically.One elastomeric bead filling member 234 is arranged on the outside of first carcass 210 and vertically radially in the outside of bead confining force reinforcing member 245.This filling member 234 radially extends upwardly to sidewall 206 from the radially exterior boundary of bead confining force reinforcing member 245, and reduces gradually on the axial cross section width.Special reinforcement material among first embodiment also goes for two carcasses here, yet but there is no need to make this carcass also to use identical materials.
Accompanying drawing 5b has represented the form of distortion of a present embodiment, and wherein first and second carcasses have a common circumference lubber-line at the bead place.In the case, this first carcass 210 can have the pressure maximization outline line identical with being used for the first embodiment tire 100.In this form of distortion, carcass 210 and 211 is by being that the coil 241 and 242 of circumference tire line reinforcing member is fixed in the bead part at least.
In the third embodiment of the present invention, as shown in Figure 6, tire 300 has three carcasses 310,311 and 312.First carcass 310 is arranged at outermost layer vertically and sidewall sections 306 places that provide in detail in first embodiment have a passage.The second and the 3rd carcass 311 and 312 is arranged at the inboard of first carcass 310 respectively vertically.Same, three meniscate fastening elements 331,332 and 333 are arranged between first and second carcass 310 and 311 respectively, between the second and the 3rd carcass 311 and 312, and between the surface, innermost layer 308 of the 3rd carcass 312 and tire 300.Be arranged on a circumference lubber-line on the common bead by border, radially innermost layer, thereby embodied three effects that carcass is fixed in the bead part in the present embodiment the second and the 3rd carcass.The consistency of this tire line in fixing endless belt can be adjusted according to the needs of the durability that can realize suitable adhesive maximum tire line consistency and bead.Shown in accompanying drawing 7, the tire line consistency in each second carcass 311 and the 3rd carcass 312 all is less than the overall tire line consistency in fixed area.By way of example, if this carcass 311 and 312 is made of cross one another tire line respectively, then the average consistency of corresponding carcass will be half of tire line consistency in the fixed area.This structure is brought, and to have a mind to effect be that tire has the axial width that lower total quality and bead place reduce.Other arrangement with different tire line consistencies also is an acceptable.For example, the second and the 3rd carcass can have the tire line consistency of minimizing and not have common circumference lubber-line at the bead place.Also can be used to the tire that this has three carcasses as the carcass reinforcement material described in first embodiment, yet necessity does not make carcass itself use identical materials yet.
The conventional tire line consistency that in the carcass that the tire of the carcass that bead is dug is being added, also can have minimizing that has.Yet, because these conventional tires all are to stack together by the fabric that multilayer is scribbled rubber to form, so they can not have common circumference lubber-line at the bead place.Its result is exactly a bead that has increased axial width, and this first body piles outwards is displaced to the inaccessiable boundary of optimal channel of outermost layer carcass vertically at the bead place.
The common circumference lubber-line of second among the present invention and the 3rd carcass allows all body piless and can be set in the bigger border vertically with respect to the tire that does not have such one common lubber-line.This second and the 3rd carcass is determined the border by the coil of circumferential tire line reinforcing member 341 and 342 in the side respectively.The setting on the radially innermost layer border of first carcass 310 is to determine by circumference tire line reinforcing member 342 and 343 as shown in Figure 6 in the axial direction.Bead part 306 also can include a bead confining force reinforcing member 345 and a bead filling member 334.

Claims (20)

1. tire, include at least one is fixed in each side of tire at the tyre bead place carcass, this tyre bead has a base on the design and installation wheel rim that is used to be installed in tire, each tyre bead radially extends upward by a sidewall sections, this sidewall sections and a tread portion join, wherein, have when this mounting of tyre on a wheel rim and when being inflated to normal pressure:
One by corresponding to this tire axial innermost surface and axially the track of the each point of the midway location between the outermost surface formed in the middle of the reference wheel profile,
Wheel rim R point R on described tyre bead is defined as its axial coordinate and equals half of normal width from the equatorial plane measurement of this tire, and its radial coordinates equals to install half of wheel rim normal diameter from the measurement of tire S. A.,
One tyre bead R point Z, it is defined as the axial outmost surface of tire and the horizontal point of crossing that wheel rim R point R radially separates,
One tyre surface R point N, it is defined within on the outermost surface of tire, and the junction between tread of tyre and sidewall sections, and it is defined in the tangent straight line of this outermost surface becomes 30 ° of angles with horizontal surface position;
One sidewall R point P, it is defined within on the outermost surface of lower tire side wall, and R point Z and N radially between;
The carcass of one of them axial outermost, the radial position between described sidewall R point P and described tyre surface R point N, be arranged at vertically described in the middle of the outside of reference wheel profile,
Its mid point Q has a radial position between described R point Z and described R point P, and described axial outermost carcass intersects at described middle reference wheel profile in this position, and
Described axial outermost carcass is set at the inboard of described middle reference wheel profile vertically thereafter described some Q radial position the inside,
Wherein in each radial position of described sidewall R point P the inside, each axial coordinate of described axial outermost carcass all has a corresponding and unique radial coordinates, and thus, this carcass is without any the tyre bead bound edge that makes progress, and
Described tire also includes one and is used for that described at least one carcass is fixed in the first tyre bead reinforcing member on the tyre bead and one and is used at the gas leakage driving process the second tyre bead reinforcing member that confining force is provided to tyre bead on the wheel rim being installed.
2. tire as claimed in claim 1 is characterized in that: described sidewall R point P is positioned at from 45% to 65% of the curve distance of described tyre bead R point Z and described tyre surface R point N measurement.
3. tire as claimed in claim 2, it is characterized in that: inwardly measure the axial location at the described outermost carcass of sidewall R point P of gained vertically from the outermost surface of described tire, for the axial outermost layer of described tire and axially the total distance between the innermost surface 8% to 25%.
4. tire as claimed in claim 1 is characterized in that: the radial position of described tyre bead R point Z is located between the radially outside 21.5mm to 25.5mm of wheel rim R point R.
5. tire as claimed in claim 4 is characterized in that: the axial location of described outermost carcass at described tyre bead R point Z place is 60% to 80% of the described tire axial outermost surface that inwardly measures vertically of the outermost surface from described tire and the total distance between the surface, innermost layer.
6. tire as claimed in claim 1, it is characterized in that: described some Q is positioned on the point of crossing of a described middle reference wheel profile and a circular arc, the initial point of this circular arc is positioned at described tyre bead R point Z place, its radius for measure at tyre bead R point Z place the axial distance between the axial location of tire outermost surface and described outermost layer carcass 90% to 120%.
7. tire as claimed in claim 1 is characterized in that: described outermost carcass is the tire axial outermost surface that inwardly measures vertically of the outermost surface from described tire and axially between the surface, innermost layer 55% to 85% of gross thickness at the axial location at described R point R place.
8. tire as claimed in claim 1, it is characterized in that: the described first tyre bead reinforcing member in an axial at least side and described at least one carcass shafts to adjacency, the described first tyre bead reinforcing member includes at least one coil that is made of the directed cord of circumference, and this cord coil has been born the pressure that results from the carcass in the inflation of tire or gas leakage driving process.
9. tire as claimed in claim 1, it is characterized in that: the described second tyre bead reinforcing member is axially set in the outside of described carcass and the described first tyre bead reinforcing member, and have at least one by the coil that constitutes for the directed cord of circumference, this cord coil is embedded in a kind of rubber mix material that has greater than Xiao's formula A level hardness of 70.
10. tire as claimed in claim 1, it is characterized in that: described tyre bead also includes at least one resilient infill, it is arranged on the axial outside of the carcass of described axial outermost vertically, and the scope of the radially outermost of described filling member is in a distance H on described wheel rim R point R 1The place, and radially interior scope is at the first tyre bead reinforcing member place, and described filling member has the coefficient of elasticity for 60Mpa.
11. tire as claimed in claim 10 is characterized in that: the radially outermost distance range of described filling member be described wheel rim R point R and the some Q between radial distance 130% to 170%.
12. tire as claimed in claim 1, it is characterized in that: at least one crescent reinforcing member is arranged at the position between the surface, innermost layer of described carcass and described tire, and described at least one crescent reinforcing member has the coefficient of elasticity of numerical value between 8Mpa to 14Mpa.
13. tire as claimed in claim 1, it is characterized in that, described at least one carcass comprises: at first carcass of its axial outermost setting, and second carcass that is axially set in the described first carcass inboard, and have the first and second crescent reinforcing members, the described first crescent reinforcing member is arranged between described first carcass and described second carcass, and the described second crescent reinforcing member is arranged between the surface, innermost layer of described second carcass and described tire.
14. tire as claimed in claim 13 is characterized in that: described first, second carcass has a common circumference lubber-line at the tyre bead place.
15. tire as claimed in claim 13 is characterized in that: the described first and second crescent reinforcing members have the coefficient of elasticity of numerical value between 8Mpa to 14Mpa.
16. tire as claimed in claim 13, it is characterized in that also including the 3rd carcass that is arranged at the described second crescent reinforcing member inboard vertically, and have the 3rd a crescent reinforcing member between the surface, described innermost layer that is arranged at described the 3rd carcass and tire.
17. tire as claimed in claim 16 is characterized in that: described the 3rd crescent reinforcing member has the coefficient of elasticity of numerical value between 8Mpa to 14Mpa.
18. tire as claimed in claim 16 is characterized in that: the described second and the 3rd carcass has a common circumference lubber-line at the tyre bead place.
19. tire as claimed in claim 13 is characterized in that: the circumference tire line consistency of described second carcass and the 3rd carcass is less than the circumference tire line consistency of described first carcass.
20. tire as claimed in claim 13 is characterized in that: the circumference tire line consistency of described second carcass and the 3rd carcass equals half of circumference tire line consistency of described first carcass.
CNB998111481A 1999-05-27 1999-05-27 Runflat tyre having optimized carcass path Expired - Fee Related CN1207160C (en)

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PCT/US1999/011812 WO2000073093A1 (en) 1999-05-27 1999-05-27 Runflat tire having optimized carcass path

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AU762139B2 (en) 2003-06-19
CN1319053A (en) 2001-10-24
JP2003500281A (en) 2003-01-07
BR9912443A (en) 2001-10-09
EP1100688A1 (en) 2001-05-23
KR20010053607A (en) 2001-06-25
WO2000073093A1 (en) 2000-12-07
AU4101499A (en) 2000-12-18

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