CN103879233A - Pneumatic tire with geodesic belt - Google Patents
Pneumatic tire with geodesic belt Download PDFInfo
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- CN103879233A CN103879233A CN201310707431.7A CN201310707431A CN103879233A CN 103879233 A CN103879233 A CN 103879233A CN 201310707431 A CN201310707431 A CN 201310707431A CN 103879233 A CN103879233 A CN 103879233A
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Abstract
The invention relates to a pneumatic tire with a geodesic belt. A tire with correction geodesic belt is described. The ideal geodesic belt path is corrected to select a center belt angle and to avoid over accumulation of the belt at the edge of the belt. The method comprises the step of calculating the shortest three-dimensional distance from one belt edge to the other belt edge by first using dynamic successive approximation method.
Description
Technical field
The present invention relates to the field of tire manufacture and Tyre structure.
Background technology
As known in the art is in aircraft tire and truck tyre, to utilize zigzag band bundle.Zigzag band bundle normally from a band Shu Bianyuan to another band Shu Bianyuan with constant angle by woven continuously, and turn in Dai Shu edge.Zigzag band bundle causes two-layer cord to be interleaved in does not have the band Shu Bianyuan of cutting together.But, depending on tire size and other factors, the angle of zigzag band bundle in crown region is generally 10-14 degree, and is typically about 90 degree at the steering angle of Dai Shu edge.But, hope be to there is higher angle to improve wearability in centerline, conventionally in the scope of 15-45 degree.
Short distance tape bundle (geodesic belt) structure has the band bundle cord in the geodesic line on the curved surface that is disposed in tire.On curved surface, geodesic line path is the shortest distance between 2 or minimum curvature on curved surface.Specific mathematic(al) law is followed in true geodesic line path: ρ cos α=constant.Compared with zigzag band bundle, true short distance tape bundle has advantages of in centerline crown angle higher.True short distance tape bundle also has advantages of there is no shearing stress, because it is shortest path.Different from zigzag band bundle structure, short distance tape bundle angle changes continuously, makes angle high in centerline, is generally approximately 45 degree, and is 180 degree in Dai Shu edge.Zigzag band bundle and short distance tape bundle all have the problem of accumulation in Dai Shu edge.Therefore, the band bundle design that is to provide a kind of improvement of hope, it revises geodesic line path in order to overcome the shortcoming of short distance tape bundle.Therefore, for previous reasons, hope be to provide a kind of tire with band bundle, described band bundle has the geodesic line path of correction and there is no above-mentioned shortcoming.
Summary of the invention
The invention provides following technical scheme:
1. an air-inflation tyre, has carcass and band Shu Zengqiang structure, and described band Shu Zengqiang structure comprises:
The first bracing ply, it has the cord of arranging with 5 degree or less angle with respect to middle circumferential plane; With correction short distance tape Shu Zengqiang structure, described correction geodesic line belt structure is formed in the three-dimensional shortest path that alternately turning point to each transverse edge place is extended, wherein said correction short distance tape Shu Zengqiang structure is wider than the first bracing ply, and is positioned at the radial outside of the first bracing ply.
2. the air-inflation tyre as described in technical scheme 1, wherein, by calculating with following formula, from one, with Shu Bianyuan, to another, the three-dimensional shortest distance path L with Shu Bianyuan is formed for the correction short distance tape bundle of tire: L=Σ (SQRT (X
2+ Y
2+ Z
2)), this is to AG, wherein Z=R* δ ψ for ψ=0.
3. the air-inflation tyre as described in technical scheme 1, wherein, angle in the centerline of revising short distance tape bundle is corrected, and with following formula calculate from one with Shu Bianyuan to another three-dimensional shortest distance path L:L=Σ (SQRT (X with Shu Bianyuan
2+ Y
2+ Z
2)), this is to AG, wherein Z=R* δ ψ for ψ=0.
4. the tire as described in technical scheme 1, wherein, described band bundle is formed by continuous bar.
5. the tire as described in technical scheme 1, wherein, described band bundle is formed by nylon/aromatic poly amide strip material.
6. the tire as described in technical scheme 1, wherein, described band bundle is formed by nylon material.
7. the tire as described in technical scheme 1, wherein, described band bundle is formed by aromatic poly amide material.
8. the air-inflation tyre as described in technical scheme 1, wherein, at least one band bundle carcass plies have percentum stretch ratio in the time of fracture be less than about 24% and disruption characteristic be greater than the cord of about 400N.
9. the air-inflation tyre as described in technical scheme 1, wherein, the one or more cords of being made by nylon that comprise in casingply.
10. the air-inflation tyre as described in technical scheme 1, wherein, stretch ratio when casingply cord has than the larger fracture of band bundle cord.
11. the air-inflation tyre as described in technical scheme 1, has the second bracing ply, it has the cord of arranging with 5 degree or less angle with respect to middle circumferential plane.
12. air-inflation tyres as described in technical scheme 1, wherein, the second bracing ply is wider than the first bracing ply.
13. air-inflation tyres as described in technical scheme 1, wherein, the second bracing ply is at the radial outside of the first bracing ply.
14. air-inflation tyres as described in technical scheme 1, further comprise: be positioned at the 3rd bracing ply of the radial outside of the first bracing ply and the second bracing ply, wherein the 3rd bracing ply is wider than the first and second band bundles.
15. air-inflation tyres as described in technical scheme 1, wherein, described improvement geodesic line belt structure is the widest bracing ply.
16. air-inflation tyres as described in technical scheme 1, wherein, described improvement geodesic line belt structure is the band bundle of outermost radial outside.
17. air-inflation tyres as described in technical scheme 1, wherein, described improvement geodesic line belt structure has the line of centers angle being selected as within the scope of 15-30 degree.
Definition
" height to width ratio " means the section height of tire and the ratio of its section width.
" axially " and " axially (vertically) " means to be parallel to line or the direction of tire rotation axis.
" tyre bead " or " weight bead core " means the part that comprises ring-type tensile member of tire conventionally, inner radial tyre bead with tire remained to wheel rim be associated, described wheel rim is held by plies cords, and be configured as and there is or do not have other enhancing element, follow enhancement Layer (chipper), triangle rubber or filler, protect toe glue and chafer such as outer guard ring infantees (flipper), tire.
The reinforcing cord that " bias ply tire " means in casingply extends across tire diagonally with respect to equatorial plane angle with about 25-65 ° from tyre bead to tyre bead of tire, and plies cords stretches with opposite angles in the layer replacing.
" cushion layer " or " cushion of tyre " means and is with bundle or belt structure or reinforcing band Shu Xiangtong.
" carcass " means the layer of tyre canvas layer material and other tyre element.Before curing to generate moulding of tyres, optional feature can be added to carcass.
" circumferentially " means line or the direction that direction perpendicular to axial direction is extended along the surperficial periphery of circular tread; It can also refer to its radius and limits many groups adjacent circular direction of curve of the axial curvature of tyre surface, as seen in section drawing.
" cord " means intrafascicular one of splicing thread, comprises the fiber for strengthening carcass plies.
" inside liner (air-retaining liner) " means a layer or multiple layer of elastic body or other material, and it forms the inside face of tubeless tires, and it limits the aerated fluid in tire.
" insert (insert) " means to be generally used for the reinforcement of the sidewall that strengthens Runflat type tire; It also refers to be positioned at the elastomeric insert of tyre surface below.
" carcass plies " means the cord reinforcement of the coated cord of elastic body.
" radially " and " radially (radially) " mean radially the direction towards or away from the rotation axis of tire.
" sidewall " means the part between tyre surface and tyre bead of tire.
" stepped construction " means unvulcanized structure, its by one or more layers tyre element or elastomer member such as inside liner, sidewall and optional carcass plies form.
Accompanying drawing explanation
To and the present invention be described with reference to the drawings by example below, in accompanying drawing:
Fig. 1 is the cross sectional view of the half of symmetrical aircraft tire.
Fig. 2 shows the transparent view of the tire of the desirable geodesic line 3 on outside face.
Fig. 3 a, 3b are the front elevations with the tire of revising short distance tape bundle.
Fig. 4 is from ψ=0 to the geodesic schematic diagram of correction of ψ=360 degree.
Fig. 5 is the side-looking rough schematic view of tire assembly drum, shows the angle of drum rotation: ψ=0 is to ψ=AG.
Fig. 6 is the flow scheme that shows the method step of invention.
Fig. 7 shows the shortest path L in artesian coordinates.
Fig. 8 is the cross sectional view of the half of symmetrical band bundle bag.
The specific embodiment
Fig. 1 shows the cross sectional view of the half of meridian aviation device tire 10 of the present invention.This tire is symmetrical around middle circumferential plane, so only have half to be illustrated.As shown in the figure, aircraft tire comprises pair of bead portions 110, and each bead part comprises the weight bead core 120 being embedded in wherein.An example of the weight bead core that is suitable for using in aircraft tire is in U.S. Patent No. 6,571, shown in 847.Weight bead core 120 preferably by multiple steel sheath line (not shown) around core in there is aluminium, aluminum alloy or other light weight alloy.It will be understood by those skilled in the art that and also can utilize other weight bead core.
Aircraft tire further comprises radial direction along the tire each outward extending sidewall sections 116 substantially from bead area 110, and the tread portion 130 extending between the radial outer end portion of sidewall sections 116.Further, the carcass 22 that tire 10 is extended to another bead part 12 circlewise from one of bead part 12 strengthens.Carcass 22 is made up of interior casingply 22 and outer casingply 24, and preferred orientation is in the radial direction.In these casingplies, conventionally have four interior carcass pliess 22 be wound inside around weight bead core 120 from tire towards its outside in order to form anti-package part, conventionally have two outer carcass pliess 24 to extend downwardly into weight bead core 120 along the outside of the anti-package part of interior casingply 22 simultaneously.Each in these casingplies 22,24 can comprise any suitable cord, is generally nylon cord such as nylon-6,6 cords, and its extension is approximately perpendicular to the equatorial plane EP (, extending along the radial direction of tire) of tire.Preferably, nylon cord has 1890 danier/2/2 or 1890 danier/3 structure.One or more in casingply 22,24 can also comprise aromatic poly amide and nylon cord structure, for example, mix cord, high-energy cord or merge cord.Suitably the example of cord is in U.S. Patent No. 4,893, and 665, have description in U.S. Patent No. 4,155,394 or U.S. Patent No. 6,799,618.
Band bundle bag 150 further comprises the second bracing ply 60 of the radial outside that is positioned at the first bracing ply 50.The second bracing ply 60 is preferably formed by the cord with respect to middle circumferential plane with 5 degree or less angle.Preferably, the bar 43 that the second bracing ply 60 is crossed by rubberized forms, the bar that described rubberized is crossed be by with respect to circumferential direction with positive and negative 5 degree or the less angle bar that the rubberized of two or more cords that cord makes crosses of reeling spirally or spirally.The first band bundle 100 is radially interior band bundles, and has width B w
s.The first band bundle 50 is all with intrafascicular narrow-band beam.The second band bundle 60 is positioned at the radial outside of the first band bundle, and has than the slightly larger width of the first band bundle.Embodiment further comprises the 3rd band bundle 70 and four-tape bundle 80, and it has 5 degree or less low angle with respect to circumferential plane.The third and fourth band Shu Youxuan is spirally reeled.The 3rd band bundle 110 is positioned at the radial outside of the second band bundle, and is substantially wider than the first and second band bundles.The 3rd band bundle has width bw3, and is the broadband bundle of first, second and four-tape bundle 50,60,80.Four-tape bundle 80 is positioned at the radial outside of the 3rd band bundle, and is that low angle band is intrafascicular the widest.Four-tape bundle has the width that is slightly less than the 3rd band bundle.Embodiment further comprises that the first correction geodesic line belt structure 120 and second revises geodesic line belt structure 130, and they are all positioned at the radial outside of first to fourth band bundle.The first short distance tape bundle 120 is positioned at the radial outside of four-tape bundle 80, and has the most wide degree BwZ of all band bundles 50,60,70,80,130.Short distance tape beam width BWg is as follows with the ratio of the narrowest cutting belt bundle Bws:
(1) 0.3<BWs/BWg<0.6, and more preferably in following scope
0.3<BWs/BWg<0.5。
In the above-described embodiments, additionally preferably: carcass plies is made up of nylon, and be with bundle to be made by aromatic poly amide/blend of nylon, make plies cords percentum stretch ratio in the time of fracture be greater than band bundle cord percentum stretch ratio.Additionally preferably: the maximum band bundle cord stretch ratio in the time of fracture is less than 18%.
Band bundle bag has at least one and revises short distance tape bundle, makes like that as described in detail below.It is helpful understanding following content: the true geodesic line on curved surface is the shortest three-dimensional distance or the minimum curvature between 2 in space.Fig. 2 shows line 3, and it shows has true geodesic band bundle.Attention: cord is tangential to band Shu Bianyuan at an A place.True geodesic line carcass plies pattern is just in time followed following mathematical formulae: ρ cos α=ρ
0cos α
0, wherein ρ is the radial distance of the cord from rotation axis to given position; α is that the cord of given position is with respect to the angle of middle circumferential plane; And ρ is the radial distance from the rotation axis of core body to crown, and ρ
0, α
0radius and the angle at circumferential plane place in the middle of being.
Fig. 3 a and 3b show the front elevation with the tire on band bundle maker of correction short distance tape bundle 120,130 structures of the present invention separately.Angle at the band bundle of edge is less than 180 degree slightly.It is different that each band bundle seems, reason is because different parameters is than the selection of line of centers angle θ s as required.Apply short distance tape bundle by the band bundle applicator on rotation B & T drum.Band bundle applicator is utilized mechanical arm applicator (not shown), its in the axial direction translation from a band Shu Bianyuan shoulder to another band Shu Bianyuan shoulder.The arm position (x axis) of the speed coordination of computer control unit control and B & T drum (ψ).Revising short distance tape beam path 120,130 is determined from following steps.
Fig. 4 and 7 shows the correction geodesic line path 151 according to instruction of the present invention.Fig. 4 shows for 1 rotating path from 0 degree to Phi=360 degree.For true geodesic line path, to locate at each band Shu Bianyuan (W/2), angle [alpha]=0 degree, makes cord at Dai Shu edge tangent.The zero degree of correction geodesic line path deviation Dai Shu of the present invention edge, to avoid the too much accumulation in Dai Shu edge.Revise the geodesic line path also angle at disalignment place, make the required line of centers angle θ s can be obtained.For the object of illustration, for exemplary tire size, be known that in 9 revolutions and form 20 line of shortest lengths (geoline).Therefore,, for true geodesic line path, in 0.45 revolution, form a line of shortest length.In each Dai Shu edge, line of shortest length is tangential to band Shu Bianyuan (α=0), and the band bundle angle of centerline is about 15.5 degree.Line of shortest length is defined as from a band Shu Bianyuan (the some A Fig. 4) to relative band Shu Bianyuan the three-dimensional shortest path of (some D, Fig. 4).Therefore, band bundle will need many line of shortest lengths to cover tire belt surface completely, be generally 80 line of shortest lengths.
AG is defined as the variation of the angle ψ from geodesic starting point A to terminal D, as shown in Figure 5.AG is set to by specifying 20 initial NR value and 30 NG value to have initial value.Along with the sequence of iterations calculating is carried out, the value of NG, AG will change.
AG=?360*NR/NG，
Wherein, NR=is in order to form the geodesic revolution number of times of NG
Geodesic quantity in NG=group, all groups all equate.
Fig. 6 shows for outlining with thinking that band bundle calculates the diagram of circuit of the step of revising line of shortest length 150.For step 10, input tape beam width, bar width and required line of centers angle θ s.For step 20, θ s is set to input value θ s, and NR is set to 20, NG and is set to 30.These values are determined from experience.
Wherein, the revolution number of times in mono-group of line of shortest length of NR=
In NG=group, there is the terminal of zero degree Phi and the geodesic quantity of starting point
For step 30, determine AG from following calculating:
AG=360*NR/NG，
In step 40, X=-W/2 to W/2 and Phi=0 in the scope of AG, be that line of shortest length is determined three-dimensional shortest distance path L from following formula:
L=Σ (SQRT (X
2+ Y
2+ Z
2)), this is to k for i=1
Wherein Z=R* δ ψ
In step 50, angle θ is calculated in centerline, and compared with input value θ s.For step 60, if θ=θ s is false, carry out step 70, wherein NG is increased by following formula:
NG?=?NG+Δ?NG
Step 30-70 is repeated until θ=θ s.
Once after θ=θ s, use the residue line of shortest length of determining group from the formula of step 40.Alternatively, once after line of shortest length is calculated, can determine other remaining line of shortest length by AG being added to the Phi value of line of shortest length data group.
The first data group is now by known, and wherein NR=20 and NG=70 are determined in this example.First group of data point of describing shortest path in X, Y, Ψ coordinate by known.For filling tape bundle surface sufficiently, need several groups, conventionally in the scope of 2～5 groups.Suppose and need in this example four data groups.In order to determine the starting point of group 2～4, from following formula computing value K.
For four data groups, the first data group is preferably by factor K correction so that by the complete cover tape bundle of cord region, and guarantees that the second data group finishes part in the first data group and starts.For four assigned data groups, the terminal of the first data group will accurately appear at degree place, Ψ=90.Therefore, our the first data group will start at Phi=0 place and finish at Phi=90 degree place.Group 2 will start at 90 degree places and finish at 180 degree places.Group 3 will start at 180 degree places and finish at 270 degree places.Group 4 will start at 270 degree places and finish at 0/360 degree place.
K=?[360*NR+360/NS])/NR
Wherein, NS is the quantity of data group to be generated, is 4 in this example.
For filling tape bundle, hope be to generate to have at least 4 data groups.
For the first data group, Ψ '=K* Ψ.
Therefore, the first data group has 70 line of shortest lengths that form in 20 revolutions, and wherein data group starts at Ψ=0 place and finishes at Ψ=90 place.K is multiplier, its data group that slightly stretches, in order to accurately with even interval such as 90 degree finish.The second data group starts at Ψ=90 place and finishes at Ψ=180 place.This data group can obtain from the first data group by adding Ψ=Ψ+90, and other data value keeps identical simultaneously.The 3rd data group starts at Ψ=180 place and finishes at degree place, Ψ=270.This data group can obtain from the first data group by adding Ψ=Ψ+180, and other data value keeps identical simultaneously.The 4th data group starts at degree place, Ψ=270 and finishes at degree place, Ψ=360.This data group can obtain from the first data group by adding Ψ=Ψ+270, and other data value keeps identical simultaneously.
Cord construction
Cord can comprise the cord of one or more rubber coateds, and it can be polyester, nylon, regenerated fiber, steel, flexten tension cotton rope or aromatic poly amide.
In view of the description of this invention provided herein, modification of the present invention is possible.Although show some representational embodiment and details for object of the present invention is described, it will be apparent to those skilled in the art that in the situation that not deviating from scope of the present invention, can make a variety of changes therein and revise.Therefore, should be understood that, can in described specific embodiment, make variation, it will fall into as in the of the present invention complete desired extent that appended claims limits below.
Claims (13)
1. an air-inflation tyre, has carcass and band Shu Zengqiang structure, is describedly characterised in that with Shu Zengqiang structure:
The first bracing ply, it has the cord of arranging with 5 degree or less angle with respect to middle circumferential plane; With correction short distance tape Shu Zengqiang structure, described correction geodesic line belt structure is formed in the three-dimensional shortest path that alternately turning point to each transverse edge place is extended, wherein said correction short distance tape Shu Zengqiang structure is wider than the first bracing ply, and is positioned at the radial outside of the first bracing ply.
2. air-inflation tyre as claimed in claim 1, is characterized in that: by calculating with following formula, from one, with Shu Bianyuan, to another, the three-dimensional shortest distance path L with Shu Bianyuan is formed for the correction short distance tape bundle of tire: L=Σ (SQRT (X
2+ Y
2+ Z
2)), this is to AG, wherein Z=R* δ ψ for ψ=0.
3. air-inflation tyre as claimed in claim 1, it is characterized in that: the angle in the centerline of revising short distance tape bundle is corrected, and with following formula calculate from one with Shu Bianyuan to another three-dimensional shortest distance path L:L=Σ (SQRT (X with Shu Bianyuan
2+ Y
2+ Z
2)), this is to AG, wherein Z=R* δ ψ for ψ=0.
4. air-inflation tyre as claimed in claim 1, is characterized in that: at least one band bundle carcass plies have percentum stretch ratio in the time of fracture be less than about 24% and disruption characteristic be greater than the cord of about 400N.
5. air-inflation tyre as claimed in claim 1, is characterized in that: the one or more cords of being made up of nylon that comprise in casingply.
6. air-inflation tyre as claimed in claim 1, is characterized in that: stretch ratio when casingply cord has than the larger fracture of band bundle cord.
7. air-inflation tyre as claimed in claim 1, has the second bracing ply, and it has the cord of arranging with 5 degree or less angle with respect to middle circumferential plane.
8. air-inflation tyre as claimed in claim 1, is characterized in that: the second bracing ply is wider than the first bracing ply.
9. air-inflation tyre as claimed in claim 1, is characterized in that: the second bracing ply is at the radial outside of the first bracing ply.
10. air-inflation tyre as claimed in claim 1, its feature is further: be positioned at the 3rd bracing ply of the radial outside of the first bracing ply and the second bracing ply, wherein the 3rd bracing ply is wider than the first and second band bundles.
11. air-inflation tyres as claimed in claim 1, is characterized in that: described improvement geodesic line belt structure is the widest bracing ply.
12. air-inflation tyres as claimed in claim 1, is characterized in that: described improvement geodesic line belt structure is the band bundle of outermost radial outside.
13. air-inflation tyres as claimed in claim 1, is characterized in that: described improvement geodesic line belt structure has the line of centers angle being selected as within the scope of 15-30 degree.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261740204P | 2012-12-20 | 2012-12-20 | |
| US61/740204 | 2012-12-20 | ||
| US13/793104 | 2013-03-11 | ||
| US13/793,104 US9199512B2 (en) | 2012-12-20 | 2013-03-11 | Pneumatic tire with geodesic belt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103879233A true CN103879233A (en) | 2014-06-25 |
| CN103879233B CN103879233B (en) | 2017-11-07 |
Family
ID=50948486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310707431.7A Expired - Fee Related CN103879233B (en) | 2012-12-20 | 2013-12-20 | The pneumatic tire with beam with geodesic line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103879233B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004254A (en) * | 2015-03-31 | 2016-10-12 | 固特异轮胎和橡胶公司 | Crown reinforcement for a pneumatic tire |
| CN106004255A (en) * | 2015-03-31 | 2016-10-12 | 固特异轮胎和橡胶公司 | Bidirectional monobelt construction for a pneumatic tire |
| CN107031292A (en) * | 2015-12-21 | 2017-08-11 | 固特异轮胎和橡胶公司 | The non-inflatable tyre of net is connected with geodesic line |
| CN111674209A (en) * | 2020-06-16 | 2020-09-18 | 江苏通用科技股份有限公司 | All-steel radial tire belt tread composite part and laminating process thereof |
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2013
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106004254A (en) * | 2015-03-31 | 2016-10-12 | 固特异轮胎和橡胶公司 | Crown reinforcement for a pneumatic tire |
| CN106004255A (en) * | 2015-03-31 | 2016-10-12 | 固特异轮胎和橡胶公司 | Bidirectional monobelt construction for a pneumatic tire |
| CN107031292A (en) * | 2015-12-21 | 2017-08-11 | 固特异轮胎和橡胶公司 | The non-inflatable tyre of net is connected with geodesic line |
| CN111674209A (en) * | 2020-06-16 | 2020-09-18 | 江苏通用科技股份有限公司 | All-steel radial tire belt tread composite part and laminating process thereof |
| CN111674209B (en) * | 2020-06-16 | 2022-05-17 | 江苏通用科技股份有限公司 | All-steel radial tire belt tread composite part and laminating process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103879233B (en) | 2017-11-07 |
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