CN1259908A - Tire with improved removable tire tread belt - Google Patents
Tire with improved removable tire tread belt Download PDFInfo
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- CN1259908A CN1259908A CN 97182284 CN97182284A CN1259908A CN 1259908 A CN1259908 A CN 1259908A CN 97182284 CN97182284 CN 97182284 CN 97182284 A CN97182284 A CN 97182284A CN 1259908 A CN1259908 A CN 1259908A
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Abstract
An improved track belt tire is constructed of a removable tread belt assembly mounted to the outer circumferential surface of an inflatable tire carcass. A unique track belt design restrains the track from expanding while simultaneously improving the secure mounting of the track to the carcass and providing improved penetration protection. Also, the improved track belt will maintain a flatter tread profile which in turn will improve tread life and durability.
Description
Technical field
The present invention relates to a kind of air-inflation tyre that has removable tread, more specifically say and relate to a kind of air-inflation tyre that has improved removable tire tread belt, constitute by the removable tire tread belt on the tire carcass that is installed in an improved band tyre bead of radially strengthening, generally be used for the earthwork vehicle.
Background of invention
The air-inflation tyre of band removable tread of the present invention is generally used for bearing very high stress and load on the large-scale earthwork vehicle and under harsh environmental conditions, for example in the stone pit, and the mine, foundry plant, and tire bears other building sites of piercing through with abrasive conditions.
Discussed as U.S. US 4,351,380, the removable tread assembly of some prior art comprises one group of that open around the peripheral intervals of supporting structure and ground ingear cover tire.Heavy load on cover tire causes producing very big stress, and these stress cause early stage tyre failure sometimes.4,351, No. 380 patent relates to a kind of improved removable tread assembly, and it comprises one group of cover tire, opens and is fixed on the stiffening band structure around the peripheral intervals of a load supporting structure, and the latter is positioned at a side of cover tire, and it is opposite that this side and cover tire mesh a ground-surface side.
The large-scale air-inflation tyre that is generally used for the earthwork vehicle lost efficacy because of heavily stressed that the harsh and unforgiving environments condition caused of their work and load sometimes.Compare with other inefficacy roots, these large-scale prior art tires at three tire positions or regional most probable lost efficacy.The anti-package end that first problematic zone is a cordline ruptures by the sidewall of tire sometimes.Second problematic zone is in the bead region tyre failure.The 3rd problematic zone is that crown district and/or the shoulder area at tire may lose efficacy.
In the prior art, the traditional solution of these problems is comprised the thickness that increases sidewall,, improve the rigidity and the intensity of bead region, and reduce the load distortion of tire down by improving sidewall thickness to improve bending stiffness.For further improving the durability of tire, the cordline anti-package part of tire is generally all strengthened.
Have with the common receipts of the present invention and allow among people's the US 4,609,023, be provided with the sidewall inserts in tire carcass, the cordline structure meets its intrinsic shape when the tire inflation to allow.
Along with the continuous effort that improves earthmoving equipment, press for a kind of new mode and tire design that is used to improve the durability of earthmoving equipment tire.The present invention just relates to a kind of improved air-inflation tyre and removable tread assembly, takes this obviously to have reduced the frequency of early stage tyre failure.The invention still further relates to provides a kind of improved air-inflation tyre and removable tread assembly, be designed to allow to divide several sections transportation giant tire and assemble in the building ground then, with the problem that solution is difficult to transport giant tire, these tires surpass 13 inches high and nearly 8000 to 15000 pound weights sometimes.In addition, the present invention relates to a kind of improved air-inflation tyre and removable tread assembly, take this to change more economically the drive performance of tire, and can reduce the stock of the spare tyre of common needs.
Purpose of the present invention and general introduction
The purpose of this invention is to provide a kind of air-inflation tyre that is used for the earthwork vehicle, in this air-inflation tyre such as the claims one or more limited, and have to be constituted as and can realize wherein one or more following purpose abilities.
The purpose of this invention is to provide a kind of improved tire and removable tread assembly that is used for the earthwork vehicle, wherein can obviously reduce the frequency of early stage tyre failure.
Another object of the present invention relates to provides a kind of improved tire and removable tread assembly, and it is designed to allow branch several sections transportation giant tire, is sending to the place assembling then.
An also purpose of the present invention provides a kind of improved tire and removable tread assembly, and taking this can be rapidly and change the drive performance of tire economically.
An also purpose of the present invention provides a kind of improved tire and removable tread assembly, takes this to reduce the quantity of the tire spare part that stores at storehouse.
An also purpose of the present invention provides a kind of improved tire and has the removable tire tread belt assembly of unique removable tread, and the latter is limited radially outward to expand.
A present invention also purpose provides a kind of improved tire and removable tire tread belt assembly, and wherein tire protector will keep more smooth tire tread contour, and this will improve tire life and durability.
A present invention also purpose provides a kind of improved tire and removable tire tread belt assembly, and wherein this removable tread is configured to provide and pierces through protection.
According to one embodiment of present invention, a kind of tire of improved band removable tread comprises: a tire carcass has one group of annular boss and groove that forms around the carcass neighboring.One detouchable removable tread assembly is installed on the outer circumferential surface of tire carcass, to form the tire of band removable tread.Described removable tread has one group of annular boss and groove of forming around its inner circumference.One group of zero degree steel wire in the annular boss of tire protector around the tire removable tread.Detouchable removable tread assembly comprises on its outer surface a ground connection tread portion.Tire carcass has one group of boss and groove of circumferentially extending, is oriented the complementary boss and the engagement of the circumferential extension on the inside face with the removable tread assembly.
Brief description
Fig. 1 is a cross sectional drawing, shows an improved tire, has according to of the present invention and be installed in removable tread on the inflatable tyre carcass;
Fig. 2 is a cross sectional drawing that amplifies, show shown in Figure 1 according to symmetrical tire of the present invention a side or half.
Fig. 2 A is a cross sectional drawing that amplifies, and shows the bead region of tire shown in Figure 2.
Fig. 3 one shows the cross sectional drawing of other embodiment, and wherein body ply is around the axial inside anti-package of steel bead wire;
Fig. 4 is a cross sectional drawing that amplifies, show shown in Figure 3 according to symmetrical tire of the present invention a side or half.
Fig. 4 A is a cross sectional drawing that amplifies, and shows the anti-package part of tire carcass shown in Figure 4.
Definition
" triangular rubber core " refers to unstrengthened elastomer, around the bead core radial location.
" tire section height and Width " refers to its profile height (SH) and its section width (SW) Ratio, multiply by 100%, represent with percentage.
" axial " and " axially " refers to be parallel to straight line or the direction of tire axis of rotation.
" tyre bead " refers to the part of tire, comprises the anti-part of opening of an annular, by the glue-line cord Hold and be configured as with rim design and cooperate, band or be not with other reinforcements, for example wire loop Outsourcing cloth, tire are followed enhancement Layer, triangular rubber core, are protected toe glue and chafer.
" belt or cushion are strengthened structure " refers at least two-layer weaving or non-woven putting down The row cord ply is arranged on below the tyre surface, do not anchor on the tyre bead, and with respect in the tire Heart plane has scope at left and right two cord angles of 17 degree to 33 degree.
" cross-ply " refers to the tire with so a kind of carcass, at the skeleton of this carcass Strengthen in the layer cord with respect to the central plane of tire from the bead core to the bead core with about 25 °-50 ° Angle obliquely cross tire and extend. Cord extends with opposite angle in the layer that replaces.
" circumferential " refers to direction perpendicular to axial direction along the periphery extension on the surface of annular tire tread Line or direction.
" chafer " refers to the strip of material around the tyre bead arranged outside, to prevent because of wheel rim The cord ply wearing and tearing that cause with respect to the motion of tire.
" tire is with enhancement Layer " refers to be arranged on the interior reinforcement material of bead part of tire.
" cord " refers to a line feeder thigh, and the cordline in the tire is made of it.
" centre plane (EP) " refers to such plane, and this plane is perpendicular to the pivot center of tire and pass the center of its tyre surface.
" bead coil outsourcing cloth " refers to the reinforcement fabric that holds around bead core and triangular rubber core.
" ground connection impression " refer to tire protector under load and pressure with the ground contact area or the area of contact of a flat surfaces.
" inside liner " is meant layer that elastic body or other materials constitute or several layers, and it has formed the inner surface of tubeless tires and has comprised charge air conditioning or fluid in the tire.
The ratio of the gross area " payload space with " contacts road surface when being meant in the ground connection impression tire protector rubber is grounded the ratio that impression inner tread area (the noncontact area that comprises groove and so on) removes gained.
" nominal rim diameter " is meant that the steel bead wire of tire seals the diameter of the wheel rim base portion of part.
" normal inflation " is meant that suitable normal structure is the customised design inflation pressure under the specific load set of the condition of sevice of tire.
" rated load " is meant that suitable normal structure is that the customised design inflation pressure customised design down that the condition of sevice of tire are set is inflated load.
" cordline " is meant the pantostrat that the gluing parallel cord constitutes.
" radially " and " radially " be meant towards or leave the direction that the pivot center of tire radially extends.
" radial-ply tyre " be meant band bundle or the circumferential air-inflation tyre of constraint, wherein the cordline that extends to tyre bead from tyre bead is to lay with the cord angle between 65 °-90 ° with respect to the centre plane of tire.
" section height (SH) " is meant at the centre plane of the tire radial distance from the nominal rim diameter of tire to external diameter.
The detailed description of invention
With reference to Fig. 1, wherein show the section of the air-inflation tyre 10 of an improved band removable tread, this tire is the earthmoving equipment tire of a 60/80R63 specification and/or a 70/68R63 specification in this specific embodiment.The tire of 60/80R63 specification has the maximum inflation external diameter of 162 inches (411.48cm), the maximum inflation axial width of 60.00 inches (152.40cm) and the nominal tyre bead diameter of 63 inches (160.02cm).The tire of 70/68R63 specification has the maximum inflation external diameter of 162 inches (411.45cm), the maximum inflation axial width of 70.0 inches (177.80cm) and the nominal tyre bead diameter of 63 inches (160.02cm).Generally with air sometimes with the miscellaneous gas of air/nitrogen with described inflation of tire to the about 100 pounds/pressure of (psi) per square inch.
The air-inflation tyre 10 of improved band removable tread comprises a removable tread 12 that circumferentially extends with ground ingear edge, and the latter is installed on the tire carcass 14 of a band tyre bead of radially strengthening.The tire carcass 14 of band tyre bead generally includes a pair of lower tire side wall 16,18, extends radially inwardly and their radial extremity terminates in pair of bead steel wire 22,24 respectively from the outer surface 20 of tire carcass.Sidewall 16,18 respectively has a top 16a, 18a, lay respectively at the interior radially inner side that reaches the maximum section width of tire carcass of shoulder area of tire carcass 14, also respectively have a bottom 16b, 18b, lay respectively near the steel bead wire 22,24 and the radially inner side of the maximum section width of tire carcass 14.To describe the details of the structure of tire carcass 14 below in detail.
Tire carcass
With reference to Fig. 1 and 2, show the details of tire carcass 14.Axially inside surface 28 is inner glue layer linings 26 that form inside liner, in order to keep the air pressure of air-inflation tyre 10.Inner glue layer lining 26 covers the whole towards inside face 28 and in order to keep being used for making tire 10 gas filed air in the carcass of tire carcass 14.Zone at the sweep of inner surface 28 in tire carcass 12 is provided with fabric barrier layer 30 and 32, is extruded cord by cordline 34 with thinking that the top that intercepts rubber layer 36 provides supporting and prevents to intercept rubber.Although show two barrier layers 30 and 32, the needs according to customised design also can use one to four barrier layer within the scope of the invention.
Be one to intercept rubber layer 36 between inside liner 26 and cordline 34, the latter supports the whole length of cordline 34 and is made of the soft compound of the rubber that bears against cordline 34.Here the annular rigid pipe that is called triangular rubber core or triangular rubber core spare 38,39 respectively has the shape of general triangular and is separately positioned on the radial outside of steel bead wire 22,24 and intercepts between rubber 36 and the inside liner 26.Triangular rubber core 38,39 extends from the zone of steel bead wire 22,24 radially outer sidewall middle parts and inside liner 26 respectively, in order to improve the rigidity of bead region, so that prevent that tire is crooked on flange 35.From triangular rubber core 38,39 axially outwards and between the cordline 34 of steel bead wire 22,24 anti-packages, be respectively arranged with bottom sizing material chafer 40,41, the latter is positioned at the zone of dress tire wheel rim 42, supports steel bead wire 22 respectively, 24, so that prevent that tire is by adjacent dress tire wheel rim wearing and tearing.Against bottom sizing material chafer 40,41 and tire lower sides 16b, 18b is respectively arranged with top sizing material chafer 44,45, so that be that steel bead wire 22,24 provides supporting in the zone of flange 35, and prevents that tire is by adjacent dress tire wheel rim wearing and tearing.
Zone at local envelopment steel bead wire 22,24 is provided with wire bead infantees layer 46,47 between bottom chafer 40,41 and rubber barrier layer 36, in order to support steel bead wire 22,24 respectively.From Fig. 2 and 2A as seen, wire bead infantees layer 46 is mainly against the inward-facing surface setting of bottom chafer 40,41.Be respectively arranged with bead coil outsourcing cloth 48,49 between the inside face of cordline and steel bead wire 22 and 24, the latter is strengthened by the textile material that holds bead coil and one of them triangular rubber core at least a portion.At the end of cordline 34 34a, the both sides of 34b are two steel wire rubberised layers 50 and 52, in order to covering the end 34a of cordline 34 respectively, 34b also makes cordline 34 can be moving between rubberised layer 50 and 51 unlikelyly when crooked expose steel wire in cordline 34 in that tire manufacturing or tire are serious.
The structure of triangular rubber core
Here be called triangular rubber core 54,55 and roughly be tetragonal two annular rigid pipes and be separately positioned on steel bead wire 22,24 radial outside, at bead coil outsourcing cloth 48, between 49 and outside triangular rubber core 58,59, in order to improve respectively around steel bead wire 22, the rigidity in 24 zone, crooked on flange 35 to prevent tire.Triangular rubber core 54,55 also is arranged between the inner, bottom and anti-package end 34a and 34b of gluing cordline 34.Reclining triangular rubber core 54 and 55 and outward radial extends from it is two annular rigid pipes are called triangular rubber core 58 and 59 here, in order to help the end 34a and the 34b of supporting gluing cordline 34.Triangular rubber core 54,55 is made of harder compound, and its modulus is about 12.2-14.9megapascals/cm under 200% stretching
2Respectively from triangular rubber core 58 and 59 axially outside be outside triangular rubber core 62 and 64.
Triangular rubber core 38,39,58,59 and 62,64 are made of identical softer rubber composite usually, and its modulus is about 7.2-8.8megapascals/cm under 200% stretching
2, in order to a cushion to be provided, so that absorb around the anti-package end 34a of cordline 34 and the stress of 34b, this stress is to be caused by the stress that the tire deflection produces.Although triangular rubber core 38,39,58,59 and 62,64 normally constitute with identical rubber composite, with scope about 7.2 and 8.8megapascals/cm
2In the different modulus formation triangular rubber core between the at 200% one or more also within the scope of the invention.In a preferred embodiment, triangular rubber core 38,39,58,59 and 62,64 is softer than triangular rubber core 54 and 55, and the latter is directly and steel bead wire 22 and 24 is adjacent and from steel bead wire 22 and 24 radially outward.Best, in order to the rubber composite that forms triangular rubber core 54 and 55 than in order to the rubber composite hard about 20% that forms triangular rubber core 38,39,58,59 and 62,64 to about 50%, preferably hard about 20% to 50%.
The location of body ply anti-package end
The location of cord layer reverse-packed end 34a and 34b is an importance of the present invention.Shown in Fig. 2 A, anti-package end 34a and 34b radially outward are arranged on a distance of about 2 to 3 times of bead coil diameters, this distance is that intersection point from line of centers 66 and straight line 67 is to straight line 68, wherein line of centers 66 extends by the center of steel bead wire 22,24, and straight line 67 is tangent with the most radially inner surface of body ply 34, body cord layer segment 34a herein, 34b is around steel bead wire 22,24, and straight line 68 is then vertical and tangent with the outer end of cordline 34 with line of centers 66.The anti-package end 34a of cordline 34, the importance of this position of the outer end of 34b is that it can bear towards cordline end applied pressure, this pressure is enough to sometimes cause that the cordline end ruptures by sidewall in the prior art structure, and extend at the middle part of the more close lower tire side wall of anti-package end in the prior art.Make the anti-package end 34a of body ply 34, the outer end of 34b is anti-package end 34a of cordline 34 when service conditions makes tire to extrinsic deflection more leaning on upper/lower positions near the advantage of the radially outer of flange 35, and the end of 34b will be by flange 35 supportings.This scheme has significantly reduced anti-package end 34a, and the possibility of be full of cracks is caused in the outer end of 34b on the sidewall of tire carcass 14, and anti-package end 34a, and the outer end of 34b axially outwards penetrates the possibility of the sidewall of tire carcass 14.
Intrinsic cordline curve
The cordline curve of cordline 34 is followed intrinsic cordline curve, in case this means and expand that it has been in its intrinsic shape.Body ply 34 keeps its intrinsic shape to reduce the expansion strain on the tire when expanding.The part that extends downwardly into the cord of bead coil 22 similarly supports along the axial inside face 37 of its length by rim flange 35, and this axial inside face 37 is roughly parallel to the line of centers 66 that passes bead coil 22,24.
Removable tread
The removable tread that circumferentially extends with the ground ingear is removably mounted on the tire carcass 14.As shown in Figure 2, the downside of removable tread 12 or inner peripheral surface 70 comprise one group of boss 76 and groove 78 ingear boss 72 and groove 74 with tire carcass 14, with constraint removable tread 12 with respect to the side direction of carcass 14 or axial motion.Tire removable tread 12 comprises a tread portion 80 and one group of tyre surface bracing ply 82,84,86 and 88 (82-88).Although show four bracing ply 82-88, the tyre surface cordline that uses other quantity on demand also within the scope of the invention.Make up detouchable tire removable tread and tire carcass for being used for large-scale earthmoving equipment, its importance is in for example tire removable tread or the tire carcass wearing and tearing and under other parts situation in working order of the part of tire, enable the part of changing of tire, but not whole tire.And, also may wish to have dissimilar tread design, for example drive or turn to tread design.This feature allows a kind of low-cost means that change tire protector, to constitute the desirable tire of suitable type.This feature will greatly reduce the cost of spare tire storage, even can prolong the work-hours of tire.
A unique aspect of the present invention is to have adopted zero degree steel wire 90.Zero degree steel wire 90 is around tire removable tread 12 and be arranged to retrain because the removable tread that serious skew causes in the tire carcass radially outward swells.By preventing that the tire removable tread from radially outward swelling, tire protector can keep a more smooth tire tread contour, and the latter will improve tread life and durability.Zero degree steel wire 90 also can provide many layer steel wires, to prevent cutting and to pierce through.Zero degree steel wire 90 is set in the annular boss 72 of tire protector 12 two additional advantages are arranged.The first, when being installed in removable tread 12 on the tire carcass 14, tire carcass is expanded and outwards compressing, make its boss 76 be pressed in the circular groove 74 that the inside face around removable tread 12 is provided with.By this way, the boss 72 that comprises the removable tread 12 of zero degree steel wire 90 just is pressed in the groove 78 of tire carcass 14.Yet because steel wire 90 stops annular boss 76 radially outward to be expanded from the crown of tire carcass 14, boss 76 just is pressed in the groove 70 that forms on the removable tread 12.Because removable tread 12 can more slightly not expanded, so just having, annular boss 76 deeper is pressed into the interior tendency of circular groove 74, with the removable tread 12 on the supporting tire carcass 14 better in having the zone of zero degree steel wire 90.Although shown zero degree steel wire 90 is to be in the annular boss 72, the zero degree steel wire that comprises an extra play also within the scope of the invention, wherein this zero degree steel wire is embedded in the removable tread between boss 71 and annular boss 72.
Other embodiment of cord layer reverse-packed end
As Fig. 3,4, shown in 4A, a tire carcass for example alternative embodiment of tire carcass 114 structurally comprises at least one doubling cordline 134 that tyre canvas constitutes, extend radially inwardly from the outer circumferential surface 110 (the crown district that also is called tire carcass) of tire carcass, and have anti-package end 134a and the 134b that holds steel bead wire 122 and 124 respectively.Although shown body ply 134 is single layer structure, also can adopt multiple-structure if desired.Body ply 134 preferably is made of the steel wire floor of gluing, but it can be made of the carcass reinforcement material of non-steel. Anti-package end 134a and 134b are importances of the present invention with respect to the flange 135 of mounting of tyre wheel rim 142 and the position of steel bead wire 122 and 124 respectively, and will be discussed in more detail hereinafter.
Be one to intercept rubber layer 136 between inside liner 126 and cordline 134, the latter supports the whole length of cordline 34 and is made of the soft compound of the rubber that bears against cordline 134.Here the annular rigid pipe that is called triangular rubber core or triangular rubber core spare 138,139 respectively has the shape of general triangular and is separately positioned on the radial outside of steel bead wire 122,124 and intercepts between rubber 136 and inside liner 126 and the anti-package cordline 134.Triangular rubber core 138,139 extends from the zone of steel bead wire 122,124 radially outer sidewall middle parts and inside liner 126 respectively, in order to improve the rigidity of bead region, so that prevent that tire is crooked on flange 135.From triangular rubber core 138,139 axially inwardly and between the cordline 34 of steel bead wire 122,124 anti-packages, be respectively arranged with bottom sizing material chafer 140,141, the latter supports steel bead wire 122,124 respectively in the zone of dress tire wheel rim 142, so that prevent that tire is by adjacent dress tire wheel rim wearing and tearing.Against bottom sizing material chafer 140,141 and tire lower sides 116b, 118b is respectively arranged with top sizing material chafer 144,145, so that in the zone of flange 135 is that steel bead wire 122,124 provides supporting, and prevent that tire is by adjacent dress tire wheel rim wearing and tearing.
Zone at local envelopment steel bead wire 122,124 is provided with wire bead infantees layer 146,147 between bottom chafer 140,141 and rubber barrier layer 136, in order to support steel bead wire 122,124 respectively.From Fig. 3,4 and 4A as seen, wire bead infantees layer 146 is mainly against the inward-facing surface setting of bottom chafer 140,141.Be respectively arranged with bead coil outsourcing cloth 148,149 between the inside face of cordline 134 and steel bead wire 122 and 124, the latter is strengthened by the textile material that holds bead coil and one of them triangular rubber core at least a portion.At the end of cordline 134 134a, the both sides of 134b are two steel wire rubberised layers 150 and 152, in order to covering the end 134a of cordline 134 respectively, 134b also makes cordline 134 can be moving between steel-cord ply 150 and 151 unlikelyly when crooked expose steel wire in cordline 134 in that tire manufacturing or tire are serious.
The triangular rubber core structure of other embodiment
Here be called triangular rubber core 154,155 and roughly be tetragonal two annular rigid pipes and be separately positioned on steel bead wire 122,124 radial outside, at bead coil outsourcing cloth 148, between 149 and outside triangular rubber core 158,159, in order to improve respectively around steel bead wire 122, the rigidity in 124 zone, crooked on the flange 135 of wheel rim 142 to prevent tire.Triangular rubber core 154,155 also is arranged between the inner, bottom and anti-package end 134a and 134b of gluing cordline 134.Reclining triangular rubber core 154 and 155 and outward radial extends from it is two annular rigid pipes are called triangular rubber core 158 and 159 here, in order to help the end 134a and the 134b of supporting gluing cordline 134.Triangular rubber core 154,155 is made of harder compound, and its modulus is about 12.2-14.9megapascals/cm under 200% stretching
2Respectively from triangular rubber core 154 and 155 axially inside be inboard triangular rubber core 138 and 139, respectively from triangular rubber core 154 and 155 axially outside be outside triangular rubber core 162 and 164.Triangular rubber core 138,139,158,159 and 162,164 are made of identical softer rubber composite usually, and its modulus is about 7.2-8.8megapascals/cm under 200% stretching
2, in order to a cushion to be provided, so that absorb around the anti-package end 134a of cordline 134 and the stress of 134b, this stress is to be caused by the stress that the tire deflection produces.Although triangular rubber core 138,139,158,159 and 162,164 normally constitute with identical rubber composite, with scope about 7.2 and 8.8megapascals/cm
2In the different modulus formation triangular rubber core between the at 200% one or more also within the scope of the invention.In a preferred embodiment, triangular rubber core 138,139,158,159 and 162,164 is softer than triangular rubber core 154 and 155, and the latter is respectively directly and steel bead wire 122 and 124 is adjacent and from steel bead wire 122 and 124 radially outward.Best, in order to the rubber composite that forms triangular rubber core 154 and 156 than in order to the rubber composite hard about 20% that forms triangular rubber core 138,139,158,159 and 162,164 to about 50%, preferably hard about 20% to 50%.
The location of the cord layer reverse-packed end of other embodiment
The location of body ply anti-package end 134a and 134b is an importance of the present invention.Anti-package end 24a preferably is set radially outwardly, 34b.They axially upcountry unroll around steel bead wire 122,124.This is a crucial improvement, because being pressed against tire pressure on the flange 135, the bead region of tire carcass 114 in fact makes cord layer reverse-packed end 134a, 134b is pressed against from the crown of carcass and axially extends downwardly on the body cord layer segment of steel bead wire 122,124.Described pressing produces one and trends towards preventing cord layer reverse-packed end 134a, the power that 134b moves radially.This has added an extra supporting with regard to oppose side wall, moves to prevent their outside vertically directions.And, because with cord layer reverse-packed end 134a, 134b is pressed against from the crown of carcass and axially extends downwardly into steel bead wire 122, effect on 124 the body cord layer segment, bead region around steel bead wire 122,124 is become directly, and has reduced the tendency that steel bead wire rotates.
Fig. 3,4 and 4A shown in design-calculated improve and to be: anti-package end 134a and 134b are arranged on a distance of about 2 to 3 times of bead coil diameters, this distance is that intersection point from line of centers 166 and straight line 167 is to straight line 168, wherein line of centers 166 is by steel bead wire 122, extend at 124 center, straight line 167 is tangent with the most radially inner surface of body ply 134, body ply anti-package end parts 134a herein, 134b is around steel bead wire 122,124, straight line 168 is then vertical and tangent with the outer end of body ply 134 with line of centers 166.The anti-package end 134a of cordline 134, this position of the outer end of 134b is important, because be enough to sometimes cause that towards cordline end applied pressure the cordline end ruptures by sidewall in the prior art structure, extend at the middle part of the more close lower tire side wall of anti-package end in the prior art.Make the anti-package end 134a of body ply 134,134b is anti-package end 134a of cordline 134 when service conditions makes tire to extrinsic deflection more leaning on upper/lower positions near the advantage of the radially outward edge of flange 135, and 134b will be by cordline 134 and flange 35 supportings.The axial cord layer reverse-packed end 134a that inwardly unrolls, total advantageous effects of 134b is to have significantly reduced anti-package end 134a, 134b axially outwards pierces through the possibility of tire carcass 114 sidewalls.
Although Fig. 3,4 and 4A show triangular rubber core 156,157,158,159,162 and 164, bead coil outsourcing cloth 148,149, and an ad hoc structure of other shared carcass members, according to the requirement of the radial-ply tyre of particular type, the axial cord layer reverse-packed end 134a that inwardly unrolls, 134b can be used on the triangular rubber core with any structure, in the radial-ply tyre of bead coil outsourcing cloth and other shared structural tire parts.Although being installed, the air-inflation tyre 100 of tire removable tread 120 can comprise the cord layer reverse-packed end 134a that axially inwardly unrolls on tire carcass 114,134b, the cord layer reverse-packed end that axially inwardly unrolls is used in also belongs to category of the present invention in the air-inflation tyre, this tire for example can be 4,609, air-inflation tyre shown in No. 023 patent, this patent integral body is combined in herein.And, although being used in the air-inflation tyre of large-scale air-inflation tyre of being installed on the earthwork vehicle and so on, the cord layer reverse-packed end that will axially inwardly unroll belongs to the present invention, to be used for also belonging to the present invention on the vehicle that airtyred inside anti-package end is used in any kind, these vehicles comprise (but non-absolute) truck, automobile, commercial and family expenses vehicle.
The intrinsic cordline curve of other embodiment
The intrinsic cordline curve of cordline 134 is followed intrinsic cordline curve, in case this means and expand that it has been in its intrinsic shape.Body ply 134 keeps its intrinsic shape to reduce the expansion strain on the tire when expanding.The part that extends downwardly into the cordline 134 of bead coil 122,124 similarly supports along the axial inside face 137 of its length by rim flange 135, and this axial inside face 137 is roughly parallel to the line of centers 166 that passes bead coil 122,124.
In whole specification sheets, the technical terms rubber composite is meant any elastomeric compound.
Clearly, provide equipment and the method that is used to constitute an improvement tire and detouchable removable tread assembly according to the present invention, wherein by comprising that improved triangular rubber core structure has obviously increased the durability of tire.Improved tire and detouchable removable tread assembly allow the form transportation large scale tire with minute several sections, assemble in the arrival place then.In addition, detouchable removable tread assembly allows to adopt different removable treads on a tire carcass, so that promptly and economically change the drive performance of tire.And detouchable removable tread assembly provides the removable tread of the uniqueness that a kind of radially outer expansion is restricted, so tire protector will keep more smooth tire tread contour, and the latter has further improved the life-span and the durability of tyre surface.The structure of removable tread provides the protection of piercing through of knowing clearly and improving.
Although described the present invention in conjunction with the embodiments, clearly those skilled in the art can obviously find out many other changes and variation according to above-mentioned instruction.Therefore, the invention is intended to comprise all these changes and variation owing to fall into the spirit and scope of the present invention.
Claims (6)
1. tire with removable tread comprises:
One tire carcass has one group of annular boss and groove that forms around the carcass neighboring;
One detouchable removable tread assembly is installed on the outer circumferential surface of tire carcass, and to form the tire of band removable tread, described removable tread has one group of annular boss and groove of forming around its inner circumference; And one group in the annular boss of tire protector around the zero degree steel wire of tire removable tread.
2. the tire of band removable tread as claimed in claim 2, wherein tire carcass has one group of boss and groove that circumferentially extends, and is oriented the complementary boss and the engagement of the circumferential extension on the inside face with the removable tread assembly.
3. the tire of band removable tread as claimed in claim 2, wherein tire carcass is the carcass of an expandable multilayer.
4. the tire of band removable tread as claimed in claim 1, wherein detouchable removable tread assembly comprises on its outer surface a ground connection tread portion.
5. removable tread that is installed on the tire carcass comprises:
One is used to be installed in the detouchable removable tread assembly on the tire carcass, and described removable tread has one group of annular boss and groove of forming around its inner circumference; And one group in the annular boss of tire protector around the zero degree steel wire of tire removable tread.
7. the tire of band removable tread as claimed in claim 5, wherein detouchable removable tread assembly comprises on its outer surface a ground connection tread portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97182284 CN1259908A (en) | 1997-05-20 | 1997-05-20 | Tire with improved removable tire tread belt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97182284 CN1259908A (en) | 1997-05-20 | 1997-05-20 | Tire with improved removable tire tread belt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1259908A true CN1259908A (en) | 2000-07-12 |
Family
ID=5178375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97182284 Pending CN1259908A (en) | 1997-05-20 | 1997-05-20 | Tire with improved removable tire tread belt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259908A (en) |
-
1997
- 1997-05-20 CN CN 97182284 patent/CN1259908A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |