CN102463848B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN102463848B CN102463848B CN201010531277.9A CN201010531277A CN102463848B CN 102463848 B CN102463848 B CN 102463848B CN 201010531277 A CN201010531277 A CN 201010531277A CN 102463848 B CN102463848 B CN 102463848B
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- tire
- air
- groove
- inflation tyre
- radial direction
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- 230000000052 comparative effect Effects 0.000 description 20
- 239000011324 bead Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 238000005096 rolling process Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
A pneumatic tire. According to the invention, when assembled on a standard wheel rim and applied with normal internal pressure, the pneumatic tire is manufactured as follows: its external diameter and overall width relative to the standard dimensions are within the range of 0mm to 6mm; 60% loaded tread width is less than 75% of overall width and greater than 60% of overall width; and a plurality of grooves are arranged along the circumferential direction and the radial direction of the tire on a limited area of the tire's external surface excluding the area from the inner end of the pneumatic tire extending to the position which is 35% of the section height.
Description
Technical field
The present invention relates to a kind of air-inflation tyre, this air-inflation tyre is such as manned vehicle, truck and passenger vehicle.
Background technology
In recent years, together with the more High Performance of automobile, the also various performances of demand tire, and on the other hand, in order to realize resources conservation and reduce free air capacity, required the exploitation of the tire with fabulous fuel efficiency.In order to increase fuel efficiency, it is important for reducing the rolling resistance of tire, but rolling resistance depends on the material of rubber and rigidity etc., makes to exist the restriction improving rolling resistance.As shown in Figure 10, when the speed (rotative speed of tire) of vehicle increases, rolling resistance also increases, and in addition, the air resistance of tire also increases, and which results in the deterioration of fuel efficiency.
Therefore, there is known a kind of tire, in this tire, in order to reduce air resistance, shoulder portions is provided with disturbance from tyre surface end to sidewall sections and prevents region, to prevent disturbance in shoulder portion office, described disturbance prevents region from not having the irregularity of such as groove, pattern and character, and the air resistance therefore, reduced on surface of tyre.The example of such structure is open in JP-A-2003-127615.
But, when carry out measuring to prevent the generation of disturbance in shoulder portion office time, the air-flow around tire becomes laminar flow, and to make the rear portion air pressure step-down of tire when the vehicle is running, and the power pulling back tire works.Therefore, even if the air resistance on surface of tyre reduces, also bring low-pressure section at the rear portion place of about tire, reduce effect to make obtaining air resistance fully when to run at high speed.
Summary of the invention
An object of the present invention is to provide a kind of air-inflation tyre, this air-inflation tyre can to run at high speed time effectively reduce air resistance.
According to aspects of the present invention, a kind of air-inflation tyre being provided, comprising: relative to being assembled to standard rim at air-inflation tyre and standard-sized lower limit under the state applying normal air pressure, being set as falling into the external diameter in the scope of 0mm to 6mm and overall width; Be set as falling into overall width 60% to overall width 75% scope in 60% load time tyre surface ground connection width; And along multiple grooves that tire circumferential direction and tire radial direction are arranged in the region except extend to the region of the position in 35% height of tire cross-sectional height from described airtyred medial end except that outer surface of tire limits.
Accompanying drawing explanation
The total structure implementing various feature of the present invention will be described with reference to the drawings.Accompanying drawing and associated description arrange and do not limit the scope of the invention for illustrating embodiments of the invention.
Fig. 1 is the airtyred fragmentary front part cutaway view that the first embodiment of the present invention is shown.
Fig. 2 is the airtyred fragmentary front part cutaway view that ground state is shown.
Fig. 3 is airtyred front cross-sectional view.
Fig. 4 is airtyred partial side view.
Fig. 5 is the airtyred partial side view that the second embodiment of the present invention is shown.
Fig. 6 is the airtyred fragmentary front part cutaway view that the third embodiment of the present invention is shown.
Fig. 7 A and Fig. 7 B shows the side sectional view of the exemplary variation of groove.
Fig. 8 A and Fig. 8 B shows the schematic diagram of the air-flow around tire.
Fig. 9 shows the form of test result.
Figure 10 shows the view of the relation between speed and rolling resistance and between speed and air resistance.
Detailed description of the invention
Describe in detail according to embodiments of the invention with reference to accompanying drawing.The present invention's scope required for protection should not be limited to graphic example and those contents described below in accompanying drawing.
Below, with reference to Fig. 1 to Fig. 4, the first embodiment of the present invention is described.Air-inflation tyre shown in these accompanying drawings is included in the tread portion 1 that tire outer surface side is formed, the pair of sidewalls part 2 formed on both sides along tire width direction, the pair of bead portions 3 formed on both sides along tire width direction and the shoulder portions 4 formed between tread portion 1 and sidewall sections 2.
This air-inflation tyre by being arranged in the liner 5 of tire inner surface side, the carcass structure 6 be arranged on the outside of liner 5, pair of bead component 7, the band 8 be arranged on the outside of carcass structure 6 be arranged in along tire width direction on both sides, be arranged in the tread member 9 on tire outer surface side and the pair of sidewalls component 10 be arranged on the both side surface side of tire is formed.
Liner 5 is that main material is formed by the laminar rubber with low-permeable, and is arranged on the inner peripheral surface side of carcass structure 6.
Carcass structure 6 is formed by covering multiple reinforcement cord 6a with laminar rubber, and both end sides is folded back sidewall sections 2 to be rolled onto together by bead member along tire width direction from inner side to outside.
Bead member 7 comprises by by line, such as metal wool, the bead core 7a that sheave is formed and the bead filler thing 7b formed by the rubber with general triangular cross section shape, and bead filler thing 7b is arranged on the outer circumferential side of bead core 7a.
Band 8 is by covering the band cord be made up of iron and steel or high strength fibre and being formed with laminar rubber, and described band 8 is arranged on the outer surface side of carcass structure 6.
Tread member 9 is made up of the rubber being formed by compression moulding, and be arranged with the outer surface side along side in the Width covering of carcass structure 6 and band 8, and on the outer surface of tread member, the groove 1a forming tread pattern is formed when sulfuration is molded.
Side wall member 10 is made up of the rubber being formed by compression moulding, and is arranged with the tire width direction covering both sides along carcass structure 6.
On airtyred outer surface, many grooves 11 are arranged on predetermined second area A2 except the A1 of first area (such as along tire circumferential direction and tire radial direction, the scope of be not less than tire cross-sectional height H along tire radial direction from medial end 35% and be not more than tire cross-sectional height H 85%), described first area A1 along tire radial direction from medial end in 35% of tire cross-sectional height H.Tire cross-sectional height is the tire cross-sectional height under the normal air pressure controlled in JATMA standard, ETRTO standard or TRA standard is charged in tire the normally loaded state also applying to be controlled by identical standard.Groove 11 is formed spheroidal, and diameter is not less than 0.5mm and is not more than 8mm, and extreme depth is not less than 0.3mm and is not more than 2mm, and is formed as same size and arranges with same intervals.In this case, groove 11 is formed that the gross area (the whole area of all grooves 11 on surface of tyre) is become and is not less than 10% of second area A2 and is not more than 80% of second area A2, more preferably, be not less than 25% of second area A2 and be not more than 65% of second area A2.In addition, groove 11 does not comprise the groove of character, symbol or the mark of instruction on tyre side surface.
Be mounted to the standard rim that controlled by JATMA standard, ETRTO standard or TRA standard and under the state applying normal air pressure at tire, air-inflation tyre is formed to make outer diameter D and overall width SW relative to standard-sized lower limit being not less than 0mm and being not more than in the scope of 6mm.Here, described standard size is the external diameter of JATMA standard, ETRTO standard or TRA standard control and the size of overall width.But JATMA standard does not control the lower limit of overall width, the lower limit controlled by ETRTO standard is made to be used as the lower limit of overall width.
In addition, when air-inflation tyre is formed to make 60% load tyre surface ground connection width TW become be not less than overall width SW 60% and be not more than 75% of overall width SW.
The air-inflation tyre of the present embodiment is formed to make outer diameter D and overall width SW relative to standard-sized lower limit being not less than 0mm and being not more than in the scope of 6mm, make outer diameter D and overall width SW be set to minimum size in standard-sized scope or close to minimum size, and raised areas forward become less than having the raised areas being forward greater than the external diameter of scope and the tire of overall width.In addition, tire is formed that tyre surface ground connection width TW is become and is not less than 60% of overall width SW and is not more than 75% of overall width SW, and therefore, projection forward becomes less than the projection forward of the tire T ' with the tyre surface ground connection width being greater than scope (long-short dash line for Fig. 2 substituted).In addition, owing to being arranged on the plurality of grooves 11 on tire outer surface, disturbance is created when the vehicle is running around tire, and as shown in fig. 8 a and fig. 8b, the low-pressure section P (region of lower density of air) caused at the rear portion place of the tire T2 with groove 11 becomes the low-pressure section P being less than the tire T1 not having groove 11, and therefore, because the resistance (power pulled back by tire) of low-pressure section P can only diminish so much.
Therefore, the air-inflation tyre of the present embodiment is formed to make outer diameter D and overall width SW relative to standard-sized lower limit being not less than 0mm and being not more than in the scope of 6mm, and tyre surface ground connection width TW become be not less than overall width SW 60% and be not more than 75% of overall width SW, to enable raised areas forward be done less, and the air resistance when to run at high speed can be effectively reduced.Especially, the earthed surface side of tire be can't help the front surface of vehicle and is covered, to make by reducing tyre surface ground connection width TW relative to overall width SW, the raised areas forward on earthed surface side can be done less as shown in Figure 2, and this is very favorable for reduction air resistance.
By arranging multiple groove 11 along tire circumferential direction and tire radial direction on tire outer surface, disturbance is created by groove 11 in around the air of tire, make the resistance pulling back tire can be done less, and the air resistance of tire can be effectively reduced when to run at high speed.In this case, groove 11 is arranged in the second area A2 except the A1 of first area, described first area A1 along tire radial direction from inner side within 35% of tire cross-sectional height, can be arranged on outside along tire radial direction to make groove 11, on described outside, revolution ratio is relatively higher on inner side along tire radial direction, tell on to make the disturbance due to groove 11 and can be increased, and large separation phenomenon can be suppressed.
Groove 11 is formed to have and is not less than 0.3mm and the degree of depth being not more than 2mm, makes to prevent due to the too small degree of depth, disturbance to be told on to become not enough and prevent due to the excessive degree of depth, air resistance to be increased.
In addition, groove 11 is formed as the shape of circle, and diameter is not less than 0.5mm and is not more than 8mm, makes to prevent due to too small groove 11, disturbance to be told on to become not enough and prevent due to excessive groove 11 and air resistance is increased.
In a first embodiment, the groove 11 being formed as the shape of circle is illustrated, but they can be formed as other shapes, such as oval or polygon.In this case, when they have elliptical shape, the long axis of elliptical shape and the diameter being on average set to groove of minor axis, and in polygonal situation, the external diameter of the circle limited is set to the diameter of groove, becomes be not less than 0.5mm and be not more than 8mm to make diameter.
In above-described embodiment, the groove with same size is illustrated, but groove can be formed to make position along tire radial direction the closer to outside, and specification is larger, as the groove 12 as shown in second embodiment of Fig. 5.Particularly, by arranging larger groove 12 along tire radial direction on outside, on described outside, rotating speed becomes than radially direction is relatively higher on inner side, disturbance tells on can be increased further and can be suppressed large separation phenomenon further, makes this be very favorable for reduction air resistance.
In addition, in above-described first embodiment, be provided with the groove 11 with same depth, but groove can be formed to make position along tire radial direction the closer to outside, and the degree of depth is less, as the groove 13 as shown in the 3rd embodiment of Fig. 6.Particularly, by arranging the groove 13 with the less degree of depth on outside along tire radial direction, on described outside, rotating speed becomes than relatively higher on inner side along tire radial direction, disturbance tells on can be increased further and can be suppressed large separation phenomenon further, makes this be very favorable for reduction air resistance.
Only sufficient effect can be obtained on outside along the Width of vehicle, when tire is mounted to vehicle, on described outside, air resistance becomes larger, make groove 11 (12,13) can only be arranged on side on the surface along tire width direction, described in when tire is mounted to vehicle, a side surface becomes the outside along vehicle-width direction.Therefore, can be lowered according to the cost of the mould of the formation of groove 11 (12,13).
In above-described embodiment, show and form spherical groove, but, they can be formed the section shape with quadrangle, groove 14 is as shown in Figure 7A the same, or can be formed as the double-deck shape comprising the different tetragonal section shape of specification, groove 15 is as shown in fig.7b the same.
Here, to comparative example 3, fuel efficiency test has been carried out to embodiment 5 and comparative example 1 for embodiments of the invention 1, and has obtained the result shown in Fig. 9.In this test, have and be used in comparative example 1 in comparative example 3 than standard-sized lower limit more than the tire of the external diameter of 6mm, and there is the tire being not more than the external diameter of 6mm than standard-sized lower limit be used in embodiment 1 in embodiment 5.In addition, in comparative example 1, have and used than the tire of standard-sized lower limit more than the overall width of 6mm, and have the tire being not more than the overall width of 6mm than standard-sized lower limit be used in comparative example 2 and comparative example 3 and embodiment 1 in embodiment 5.In addition, in comparative example 1, the tire with the value (T/S ratio) being greater than 0.7 is used, described value is obtained with tyre surface ground connection width during 60% load divided by overall width when applying normal air pressure and tire is mounted to standard rim, and in comparative example 2 and comparative example 3, the tire with the T/S ratio being less than 0.65 is used, and embodiment 1, in embodiment 5, has the tire being not less than 0.65 and the T/S ratio that is not more than 0.7 and used.Use in comparative example 1 and comparative example 2 and do not have bossed tire, and be used in comparative example 3 and embodiment 1 in embodiment 5 with the tire of circular groove.In this case, in comparative example 3, reeded tire is with to be used, described groove be arranged on along tire radial direction from medial end tire cross-sectional height 35% in scope in, and in embodiment 1 in embodiment 5, be with reeded tire to be used, described groove is arranged on except the region along tire radial direction except the scope in 35% of medial end tire cross-sectional height.In addition, in comparative example 3 and embodiment 1 in embodiment 4, used with the tire being arranged on the groove in both side surface along tire width direction, and in embodiment 5, used with the tire being only arranged on the groove on surface, side along tire width direction, a described side surface becomes the outside of the Width along vehicle when tire is mounted to vehicle.In embodiment 3 in embodiment 5, reeded tire is with to be used, the degree of depth of described groove becomes near outside along tire radial direction along with their position and becomes less, and in embodiment 4 and embodiment 5, be with reeded tire to be used, the specification of described groove becomes near outside along tire radial direction along with their position and becomes large.
In this test, the tire size of 185/65R15 is used, but, when this specification, according to JATMA standard, the external diameter of standard is 614mm to 628mm and standard overall width (ETRTO standard is applied to lower limit) is 182mm to 197mm, and according to ETRTO standard, nominal outer diameter is 614mm to 628mm and standard overall width is 182mm to 196mm, and according to TRA standard, nominal outer diameter is 614mm to 628mm and standard overall width is 182mm to 194mm.
In this test, the small passenger car (f-w-d) of 1500cc discharge capacity that the tire with 230kPa air pressure is mounted to (motor is assisted), and consumption of fuel is measured and determined index when the automobile test runway that 10 circle 2km are long with the speeds of l00km/h, and be 100 assess comparative example 2 and comparative example 3 and embodiment 1 to embodiment 5 by limiting comparative example 1.In this case, index is larger, and preceence is higher.Due to the result of test, embodiment 1 is better than comparative example 1 to comparative example 3 to embodiment 5 in fuel efficiency.
As described above, the air-inflation tyre with less raised areas is forward provided.Therefore, the power pulling back tire when running can be reduced, and air resistance when to run at high speed can be sufficiently decreased, and this is very favorable from the improvement of fuel efficiency.
Although describe above according to embodiments of the invention, the present invention can be not limited to embodiment above-mentioned, but can diversely be revised.Parts disclosed in aforesaid embodiment can suitably combine to form various amendment.Such as, some in an embodiment in disclosed all parts can be removed and maybe can be appropriately combined.
For those of skill in the art, additional advantage and amendment will occur easily.Therefore, the present invention of wider aspect can be not limited to the concrete details of shown here and description and representational embodiment.Therefore, when not deviating from the spirit and scope as the total inventive concept by claims and their equivalents, various amendment can be made.
Claims (4)
1. an air-inflation tyre, comprising:
Relative to being assembled to standard rim at described air-inflation tyre and standard-sized lower limit under the state applying normal air pressure, be set as falling into the external diameter in the scope of 0mm to 6mm and overall width;
Be set as falling into the tyre surface ground connection width when 60% load in the scope of 60% to 75% of described overall width; And
Along multiple grooves that tire circumferential direction and tire radial direction are arranged in the second area except extend to the first area of the position in 35% height of tire cross-sectional height from described airtyred medial end except that outer surface of tire limits, described multiple groove is formed to make the gross area of all grooves be not less than 25% of described second area and be not more than 65% of described second area, described multiple groove is formed in the outside of described airtyred described tire radial direction larger, described multiple groove is formed at the inner side place of described airtyred described tire radial direction more intensive, and described multiple groove is formed in the outside of described airtyred described tire radial direction more shallow.
2. air-inflation tyre according to claim 1,
Wherein said groove type becomes the degree of depth had in the scope from 0.3mm to 2mm.
3. air-inflation tyre according to claim 1,
Wherein said groove type becomes the diameter had in the scope from 0.5mm to 8mm.
4. air-inflation tyre according to claim 1,
Wherein said groove is only arranged on a side surface of described airtyred described tire width direction, and when described air-inflation tyre is assembled to vehicle, a described side surface becomes the outside of the Width of described vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531277.9A CN102463848B (en) | 2010-10-29 | 2010-10-29 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010531277.9A CN102463848B (en) | 2010-10-29 | 2010-10-29 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102463848A CN102463848A (en) | 2012-05-23 |
| CN102463848B true CN102463848B (en) | 2015-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010531277.9A Active CN102463848B (en) | 2010-10-29 | 2010-10-29 | Pneumatic tire |
Country Status (1)
| Country | Link |
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| CN (1) | CN102463848B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5516765B1 (en) * | 2013-01-18 | 2014-06-11 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6434284B2 (en) * | 2014-11-19 | 2018-12-05 | 株式会社ブリヂストン | Pneumatic tire |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3113374B2 (en) * | 1992-03-10 | 2000-11-27 | 株式会社ブリヂストン | Pneumatic radial tire |
| JP2000016030A (en) * | 1998-07-07 | 2000-01-18 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| US6564839B1 (en) * | 2000-11-01 | 2003-05-20 | The Goodyear Tire & Rubber Company | Pneumatic tire having a load dependent adaptive footprint shape |
| JP2008001249A (en) * | 2006-06-23 | 2008-01-10 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP5254126B2 (en) * | 2008-05-16 | 2013-08-07 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5317667B2 (en) * | 2008-12-19 | 2013-10-16 | 住友ゴム工業株式会社 | Pneumatic tire |
-
2010
- 2010-10-29 CN CN201010531277.9A patent/CN102463848B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| 12.00-20小轮胎载重轮胎优化设计;程曲之;《轮胎工业》;20050731;第25卷(第7期);第399-400页 * |
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| CN102463848A (en) | 2012-05-23 |
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