CN102463848A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN102463848A CN102463848A CN2010105312779A CN201010531277A CN102463848A CN 102463848 A CN102463848 A CN 102463848A CN 2010105312779 A CN2010105312779 A CN 2010105312779A CN 201010531277 A CN201010531277 A CN 201010531277A CN 102463848 A CN102463848 A CN 102463848A
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- Prior art keywords
- tire
- air
- groove
- inflation tyre
- width
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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
- 239000000463 material Substances 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
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000931705 Cicada Species 0.000 description 1
- 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
- 230000006866 deterioration Effects 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
- 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
Images
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 for example is used for 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 to reduce free air capacity, have required to have the exploitation of the tire of fabulous fuel efficiency.In order to increase fuel efficiency, the rolling resistance that reduces tire is important, yet rolling resistance depends on material and the rigidity of rubber etc., makes to have the restriction that improves rolling resistance.As shown in Figure 10, when the speed (rotative speed of tire) of vehicle increased, rolling resistance also increased, and in addition, the air resistance of tire also increases, and this has caused the deterioration of fuel efficiency.
Therefore, a kind of tire of cicada is in this tire; In order to reduce air resistance; On the tire shoulder part, be provided with disturbance from the tyre surface end to sidewall sections and prevent the zone, partly to locate to prevent disturbance at tire shoulder, said disturbance prevents that the zone from not having the irregularity such as groove, pattern and character; And therefore, reduced the air resistance on the surface of tyre.The example of such structure is open in JP-A-2003-127615.
Yet, when measuring when tire shoulder is partly located to prevent the generation of disturbance, become laminar flow around the air-flow of tire so that when vehicle ' the rear portion air pressure step-down of tire, and the power that pulls back tire works.Therefore,, also brought low-pressure section into, reduced effect so that when at high speed goes, can not obtain air resistance fully at the place, rear portion of about tire even the air resistance on the surface of tyre has reduced.
Summary of the invention
One of the object of the invention provides a kind of air-inflation tyre, and this air-inflation tyre reduces air resistance effectively when can at high speed going.
According to aspects of the present invention, a kind of air-inflation tyre is provided, comprises: fall into external diameter and the overall width of 0mm in the scope of 6mm with respect to being assembled to standard rim at air-inflation tyre and applying the standard-sized lower limit under the state of normal air pressure, being set at; Tyre surface ground connection width when being set at 60% 60% load in 75% the scope of overall width that falls into overall width; And a plurality of grooves that are provided with along tire circumferential direction and tire radial direction the zone the zone of the position in 35% height that extends to the tire cross-sectional height from said airtyred medial end that on outer surface of tire, limits.
Description of drawings
The total structure of the various characteristics of embodiment of the present invention will be described with reference to the drawings.Accompanying drawing and associated description are provided for illustrating embodiments of the invention and do not limit the scope of the invention.
Fig. 1 is the airtyred local front cross-sectional view that the first embodiment of the present invention is shown.
Fig. 2 is the airtyred local front cross-sectional 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 local front cross-sectional view that the third embodiment of the present invention is shown.
Fig. 7 A and Fig. 7 B show the side sectional view of the exemplary variation of groove.
Fig. 8 A and Fig. 8 B show the scheme drawing around the air-flow of tire.
Fig. 9 shows the form of test result.
Figure 10 shows between speed and the rolling resistance and the view of the relation between speed and the air resistance.
The specific embodiment
To be described in detail with reference to the attached drawings according to embodiments of the invention.Those contents that the present invention's scope required for protection should not be limited to graphic example in the accompanying drawing and describe below.
Below, will the first embodiment of the present invention be described referring to figs. 1 to Fig. 4.Air-inflation tyre shown in these accompanying drawings is included in the tread portion 1 that forms on the tire outer surface side, along tire width direction in the pair of sidewalls part 2 that forms on the both sides, the pair of bead portions 3 that is forming on the both sides along tire width direction and the tire shoulder part 4 that between tread portion 1 and sidewall sections 2, forms.
This air-inflation tyre by the liner that is arranged in the tire inner surface side 5, be arranged in carcass member 6 on the outside of liner 5, be arranged in pair of bead member 7 on the both sides, be arranged in band 8 on the outside of carcass member 6, be arranged in the tyre surface member 9 on the tire outer surface side and the pair of sidewalls member 10 that is arranged on the both side surface side of tire forms along tire width direction.
Carcass member 6 forms through cover a plurality of reinforcement cord 6a with laminar rubber, and both end sides is gone back to sidewall sections 2 so that the tyre bead member is rolled onto together along tire width direction from the interior outside that measures.
Tyre bead member 7 comprises through with line, such as metal wool, and bead core 7a that sheave forms and the tyre bead weighting material 7b that forms by rubber with general triangular cross section shape, and tyre bead weighting material 7b is arranged on the outer circumferential side of bead core 7a.
Tyre surface member 9 is processed by the rubber that forms through compression moulding; And be arranged outer surface side with side and band 8 in the Width covering of carcass member 6; And on the outer surface of tyre surface member, the groove 1a that forms tread pattern forms when sulfuration is molded.
On airtyred outer surface; Many grooves 11 along tire circumferential direction and tire radial direction be arranged on except the A1 of first area predetermined second area A2 (for example; Be not less than along the tire radial direction from medial end tire cross-sectional height H 35% and also be not more than 85% the scope of tire cross-sectional height H), said first area A1 along the tire radial direction from medial end tire cross-sectional height H 35% in.The tire cross-sectional height is that the normal air pressure in JATMA standard, ETRTO standard or the control of TRA standard is charged in the tire and applies by the tire cross-sectional height under the normally loaded state of identical standard control.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 forms same size and arrange with same intervals.In this case; Groove 11 be formed the gross area (the whole area of all grooves 11 on the surface of tyre) is become be not less than second area A2 10% and be not more than 80% of second area A2; More preferably, be not less than second area A2 25% and be not more than 65% of second area A2.In addition, groove 11 does not comprise the groove of indication at the lip-deep character of tyre side, symbol or mark.
Be mounted to by the standard rim of JATMA standard, ETRTO standard or the control of TRA standard and apply under the state of normal air pressure at tire, air-inflation tyre is formed and makes D outer diameter and overall width SW be not less than 0mm and be not more than in the scope of 6mm with respect to standard-sized lower limit.Here, said standard size is JATMA standard, ETRTO standard or the external diameter of TRA standard control and the size of overall width.Yet the JATMA standard is not controlled the lower limit of overall width, makes the lower limit by the control of ETRTO standard be used as the lower limit of overall width.
In addition, air-inflation tyre be formed tyre surface ground connection width TW when making 60% load become be not less than overall width SW 60% and be not more than 75% of overall width SW.
The air-inflation tyre of present embodiment is formed and makes D outer diameter and overall width SW be not less than 0mm and be not more than in the scope of 6mm with respect to standard-sized lower limit; Make that D outer diameter and overall width SW are set to the minimum size in the standard-sized scope or near minimum size, and raised areas forward becomes than has little greater than the raised areas forward of the tire of the external diameter of scope and overall width.In addition; Tire be formed tyre surface ground connection width TW is become be not less than overall width SW 60% and be not more than 75% of overall width SW; And therefore, forward projection becomes than has little greater than the projection forward of the tire T ' of the tyre surface ground connection width of scope (substitute be the length dotted line of Fig. 2).In addition; Owing to be arranged on the plurality of grooves 11 on the tire outer surface; When vehicle ', produced disturbance around tire, and shown in Fig. 8 A and Fig. 8 B, the low-pressure section P (zone of low density of air) that causes at the place, rear portion of the tire T1 with groove 11 becomes less than the low-pressure section P of the tire T2 that does not have groove 11; And (power that tire is pulled back) can only diminish so much therefore, because the resistance of low-pressure section P.
Therefore; The air-inflation tyre of present embodiment is formed and makes D outer diameter and overall width SW be not less than 0mm and be not more than in the scope of 6mm with respect to standard-sized lower limit; 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; So that raised areas forward can be done is littler, and air resistance can be reduced effectively when at high speed goes.Especially; The earthed surface side of tire can't help the front surface of vehicle and is covered; So that green phase reduces tyre surface ground connection width TW for overall width SW, it is littler that the raised areas forward on the earthed surface side can be done as shown in Figure 2, and this is very favorable for reducing air resistance.
Through on the tire outer surface, a plurality of grooves 11 being set along tire circumferential direction and tire radial direction; In around the air of tire, produced disturbance by groove 11; It is littler that the feasible resistance that pulls back tire can be done, and the air resistance of tire can be reduced effectively when at high speed goes.In this case; Groove 11 is arranged among the second area A2 except the A1 of first area; Said first area A1 along the tire radial direction from the inboard the tire cross-sectional height 35% within so that groove 11 can along the tire radial direction be arranged in the outside on, revolution ratio is relatively higher on the inboard along the tire radial direction on the said outside; So that owing to the disturbance of groove 11 tells on and can be increased, and can suppress big separation phenomenon.
Groove 11 is formed has the degree of depth that is not less than 0.3mm and is not more than 2mm, makes to have prevented to increase owing to the excessive degree of depth makes air resistance owing to the too small degree of depth tells on disturbance and becomes not enough and prevented.
In addition, groove 11 forms round shape, and diameter is not less than 0.5mm and is not more than 8mm, makes to have prevented to increase owing to excessive groove 11 makes air resistance owing to too small groove 11 tells on disturbance and becomes not enough and prevented.
In first embodiment, the groove 11 that forms round shape is illustrated, yet they can form other shapes, such as ellipse or polygon.In this case; When they have elliptical shape, the diameter that on average is set to groove of the long axis of elliptical shape and minor axis, and under polygonal situation; The external diameter of the circle that limits is set to the diameter of groove, is not less than 0.5mm and is not more than 8mm so that diameter becomes.
Among the embodiment that describes in the above, the groove with same size is illustrated, yet, groove can be formed make the position along the tire radial direction the closer to the outside, specification is big more, as the groove 12 shown in second embodiment of Fig. 5.Particularly; Through on the outside, arranging bigger groove 12 along the tire radial direction; Rotating speed becomes than relatively higher on the inboard along radial direction on the said outside; Disturbance tells on and can and can further suppress big separation phenomenon by further increase, makes that this is very favorable for reducing air resistance.
In addition, among first embodiment that describes, be provided with groove 11 in the above with same depth, yet, groove can be formed make the position along the tire radial direction the closer to the outside, the degree of depth is more little, as the groove 13 shown in the 3rd embodiment of Fig. 6.Particularly; Through on the outside, arrange groove 13 along the tire radial direction with less degree of depth; Rotating speed becomes than relatively higher on the inboard along the tire radial direction on the said outside; Disturbance tells on and can and can further suppress big separation phenomenon by further increase, makes that this is very favorable for reducing air resistance.
Can only on the outside, obtain effect of sufficient along the Width of vehicle; Air resistance becomes bigger on the said outside when tire is mounted to vehicle; Make groove 11 (12,13) only to be set on the side surface along tire width direction, a said side surface becomes the outside along vehicle-width direction when tire is mounted to vehicle.Therefore, the cost according to the mould of the formation of groove 11 (12,13) can be lowered.
Among the embodiment that describes in the above; Show and form the ball-shaped groove; Yet they can be formed has tetragonal section shape, as the groove shown in Fig. 7 A 14; Perhaps can form the double-deck shape of the quadrangle section shape that comprises that specification is different, as the groove shown in Fig. 7 B 15.
Here, carried out the fuel efficiency test for embodiments of the invention 1 to embodiment 5 and comparative example 1 to comparative example 3, and obtained the result shown in Fig. 9.In this test, have than standard-sized lower limit and be used in comparative example 1 in comparative example 3, and have the tire that is not more than the external diameter of 6mm than standard-sized lower limit and be used among the embodiment 1 to embodiment 5 more than the tire of the external diameter of 6mm.In addition; In comparative example 1; Have than the tire of standard-sized lower limit and be used, and have the tire that is not more than the overall width of 6mm than standard-sized lower limit and be used in comparative example 2 and the comparative example 3 and among the embodiment 1 to embodiment 5 more than the overall width of 6mm.In addition; In comparative example 1, the tire with value greater than 0.7 (T/S than) is used, and tyre surface ground connection width obtains said value divided by overall width during with 60% load when applying normal air pressure and tire and be mounted to standard rim; And in comparative example 2 and comparative example 3; The tire that has less than 0.65 T/S ratio is used, among the embodiment 1 to embodiment 5, have be not less than 0.65 and the tire that is not more than 0.7 T/S ratio be used.In comparative example 1 and comparative example 2, using does not have the tire of projection, and the tire that has a circular groove is used among comparative example 3 and the embodiment 1 to embodiment 5.In this case; In comparative example 3; The tire that has groove is used, said groove be arranged on along the tire radial direction from medial end tire cross-sectional height 35% in scope in, and in embodiment 1 to embodiment 5; The tire that has groove is used, said groove be arranged on except along the tire radial direction from medial end tire cross-sectional height 35% in scope the zone.In addition; In comparative example 3 and embodiment 1 to embodiment 4; Having the tire that is arranged on the groove on the both side surface along tire width direction is used; And in embodiment 5, have the tire that only is arranged on the groove on the side surface along tire width direction and be used, a said side surface becomes when tire is mounted to vehicle along the outside of the Width of vehicle.In embodiment 3 to embodiment 5; The tire that has groove is used; The degree of depth of said groove becomes littler along with their position becomes along the tire radial direction near the outside; And in embodiment 4 and embodiment 5, the tire that has groove is used, and the specification of said groove becomes big along with their position becomes along the tire radial direction near the outside.
In this test, the tire size of 185/65R15 is used, yet; Under the situation of this specification, according to the JATMA standard, the external diameter of standard is that 614mm is that 182mm is to 197mm to 628mm and standard overall width (the ETRTO standard is applied to lower limit); And according to the ETRTO standard; Nominal outer diameter be 614mm to 628mm and standard overall width be 182mm to 196mm, and according to the TRA standard, nominal outer diameter is that 614mm is that 182mm is to 194mm to 628mm and standard overall width.
In this test; Tire with 230kPa air pressure is mounted to the small-sized manned vehicle (f-w-d) of (motor is assisted) 1500cc discharge capacity; And when automobile with the speed of 100km/h during the long test runway of 10 circle 2km consumption of fuel measured and by the definiteness number, and be 100 to assess comparative example 2 and comparative example 3 and embodiment 1 to embodiment 5 through limiting comparative example 1.In this case, index is big more, and preceence is high more.Because the result of test, embodiment 1 to embodiment 5 are superior to comparative example 1 to comparative example 3 on fuel efficiency.
As above-described, the air-inflation tyre with less raised areas forward is provided.Therefore, the power that when going, pulls back tire can be reduced, and make that air resistance can be reduced effectively when at high speed goes, and this improvement from fuel efficiency is very favorable.
Although describe in the above according to embodiments of the invention, the present invention can be not limited to embodiment above-mentioned, but can diversely be revised.Disclosed parts can suitably make up to form various modifications among the aforesaid embodiment.For example, some in disclosed in an embodiment all parts can be removed or can be by combination suitably.
For those of skill in the art, additional advantage will take place with revising easily.Therefore, the present invention of wider aspect concrete details and representational embodiment that can be not limited to illustrate here and that describe.Therefore, under situation about not deviating from, can make various modifications like the spirit of total inventive concept of limiting accompanying claims and their equivalent and scope.
Claims (6)
1. air-inflation tyre comprises:
Fall into external diameter and the overall width of 0mm in the scope of 6mm with respect to being assembled to standard rim at said air-inflation tyre and applying the standard-sized lower limit under the state of normal air pressure, being set at;
Be set at the tyre surface ground connection width when 60% load in 60% to 75% the scope that falls into said overall width; And
The a plurality of grooves that are provided with along tire circumferential direction and tire radial direction the zone the zone of the position in 35% height that extends to the tire cross-sectional height from said airtyred medial end that on outer surface of tire, limits.
2. air-inflation tyre according to claim 1,
Wherein said groove shape becomes the degree of depth that has in the scope from 0.3mm to 2mm.
3. air-inflation tyre according to claim 1,
Wherein said groove shape becomes the diameter that has in the scope from 0.5mm to 8mm.
4. air-inflation tyre according to claim 1,
Wherein the position the more said groove shape towards the outside of said airtyred said tire radial direction become and have bigger specification.
5. air-inflation tyre according to claim 1,
Wherein the position the more said groove shape towards the outside of said airtyred said tire radial direction become and have the littler degree of depth.
6. air-inflation tyre according to claim 1,
Wherein said groove only is arranged on the side surface of said airtyred said tire width direction, and when said air-inflation tyre was assembled to vehicle, a said side surface became the outside of the Width of said 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 true CN102463848A (en) | 2012-05-23 |
| CN102463848B CN102463848B (en) | 2015-05-06 |
Family
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Family Applications (1)
| 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 |
|---|---|
| CN (1) | CN102463848B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812595A (en) * | 2013-01-18 | 2015-07-29 | 横滨橡胶株式会社 | Pneumatic tire |
| EP3222442A4 (en) * | 2014-11-19 | 2017-11-29 | Bridgestone Corporation | Pneumatic tire |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000016030A (en) * | 1998-07-07 | 2000-01-18 | Yokohama Rubber Co Ltd:The | Pneumatic radial tire |
| JP3113374B2 (en) * | 1992-03-10 | 2000-11-27 | 株式会社ブリヂストン | 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 |
| JP2009298397A (en) * | 2008-05-16 | 2009-12-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2010143420A (en) * | 2008-12-19 | 2010-07-01 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
-
2010
- 2010-10-29 CN CN201010531277.9A patent/CN102463848B/en active Active
Patent Citations (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 |
| JP2009298397A (en) * | 2008-05-16 | 2009-12-24 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP2010143420A (en) * | 2008-12-19 | 2010-07-01 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
Non-Patent Citations (1)
| Title |
|---|
| 程曲之: "12.00-20小轮胎载重轮胎优化设计", 《轮胎工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104812595A (en) * | 2013-01-18 | 2015-07-29 | 横滨橡胶株式会社 | Pneumatic tire |
| EP3222442A4 (en) * | 2014-11-19 | 2017-11-29 | Bridgestone Corporation | Pneumatic tire |
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| Publication number | Publication date |
|---|---|
| CN102463848B (en) | 2015-05-06 |
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Address after: Kanagawa Prefecture, Japan Patentee after: THE YOKOHAMA RUBBER Co.,Ltd. Country or region after: Japan Address before: Tokyo Patentee before: THE YOKOHAMA RUBBER Co.,Ltd. Country or region before: Japan |