CN104972843A - Pneumatic tyre - Google Patents
Pneumatic tyre Download PDFInfo
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- CN104972843A CN104972843A CN201510165804.1A CN201510165804A CN104972843A CN 104972843 A CN104972843 A CN 104972843A CN 201510165804 A CN201510165804 A CN 201510165804A CN 104972843 A CN104972843 A CN 104972843A
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Abstract
The invention provides a pneumatic tyre (1) which is used for improving the mud road performance and the sand road performance. The pneumatic tyre (1) is provided with a tyre shoulder pattern block (3) and a central pattern block (4). The tread (3a) of the tyre shoulder pattern block (3) is provided with a buffer inclined part (6) and a steep inclined part (7), wherein the buffer inclined part (6) extends toward the axial internal side of the tyre below the tyre axial 15 DEG from the tread end (Te); the steep inclined part (7) is connected with the buffer inclined part (6) and is provided with an angle greater than the buffer inclined part (6) relative to the tyre axial direction; the tread (4a) of the central pattern block (4) is provided with a first inclined part (15) and a second inclined part (16); the first inclined part (15) inclines toward the direction which is identical to the steep inclined part (7) of the tyre shoulder pattern block (3); the second inclined part (16) is connected with the first inclined part (15) and inclines toward the tread end (Te) at the direction opposite to the first inclined part (15); and the tyre circumferential length of the first inclined part (15) is greater than the tyre circumferential length of the second inclined part (16).
Description
Technical field
The present invention relates to the air-inflation tyre improving road performance and sand road performance.
Background technology
For full season tire, M+S type running on rough terrain air-inflation tyre for, such as require to play sufficient traction property, casting in marshy area, road surfaces or arrange tophaceous so-called road performance, sand road performance.In order to improve road performance, sand road performance, have employed the tire being provided with the pattern block pattern of multiple pattern block at fetus face.The shape of the tread of pattern block has a significant impact traction property, casting etc.
Patent documentation 1: Japanese Unexamined Patent Publication 5-38904 publication
Summary of the invention
Main purpose of the present invention is, provides a kind of air-inflation tyre, improves the shape of the tread of center running lug and pattern block on tire shoulder, as substantially, can play good road performance and sand road performance.
The present invention relates to air-inflation tyre, it is configured at the pattern block on tire shoulder of tyre surface side fetus face being provided with, with the center running lug inside the tire axial being configured at above-mentioned pattern block on tire shoulder, it is characterized in that, the tread of above-mentioned pattern block on tire shoulder has: from tyre surface side relative to the flat pitch portion that tire axial extends inside tire axial with the angle of less than 15 degree, and to be connected with above-mentioned flat pitch portion and there is relative to tire axial the steep rake of the angle being greater than above-mentioned flat pitch portion, the tread of above-mentioned center running lug has: the 1st rake tilted to the direction that the above-mentioned steep rake with above-mentioned pattern block on tire shoulder is identical, and to connect with above-mentioned 1st rake and with contrary with above-mentioned 1st rake towards the 2nd rake tilted to tyre surface side, the length of the tire circumference of above-mentioned 1st rake is larger than above-mentioned 2nd rake.
Air-inflation tyre of the present invention is preferably, and the above-mentioned steep rake of above-mentioned pattern block on tire shoulder and above-mentioned 1st rake of above-mentioned center running lug are configured to via ditch continuously.
Air-inflation tyre of the present invention is preferably, and above-mentioned pattern block on tire shoulder has the 1st pattern block edge inside the tire axial dividing above-mentioned steep rake, and above-mentioned 1st pattern block edge is included in the arc sections that tyre surface side has center.
Air-inflation tyre of the present invention is preferably, and above-mentioned pattern block on tire shoulder has the 2nd pattern block edge outside the tire axial dividing above-mentioned steep rake, and above-mentioned 2nd pattern block edge comprises relative to tire axial with the steep dip inclined tab of the angular slope of 40 ~ 60 degree.
Air-inflation tyre of the present invention is preferably, and above-mentioned 1st rake of above-mentioned center running lug has towards the side pattern block edge of tire equator side, and above-mentioned side pattern block edge is included in the arc sections that tire equator side has center.
Air-inflation tyre of the present invention is preferably, and above-mentioned flat pitch portion is greater than 0 degree relative to the angle of tire axial.
Airtyred fetus face of the present invention is provided with pattern block on tire shoulder and center running lug.The tread of pattern block on tire shoulder has: the flat pitch portion extended inside tire axial with the angle of less than 15 degree relative to tire axial from tyre surface side and be connected with flat pitch portion and have the steep rake of the angle being greater than flat pitch portion relative to tire axial.The tread of center running lug has: the 1st rake tilted to the direction that the steep rake with pattern block on tire shoulder is identical and to be connected with the 1st rake and with contrary with the 1st rake towards the 2nd rake tilted to tyre surface side.The fetus face with above-mentioned pattern block and can catch earth, gravel etc. between the 1st rake and the 2nd rake between flat pitch portion and steep rake effectively.Therefore, it is possible to obtain the ground large traction property of unfairness.
The length of the tire circumference of the 1st rake is larger than above-mentioned 2nd rake.Thus, the 1st rake has larger power than the 2nd rake from road surface effect, and therefore the 1st rake is larger than deflection during the 2nd rake ground connection.Therefore, when ground connection, the 1st rake, the 2nd rake carry out unbalanced distortion, thus the earth, gravel etc. caught by the 1st rake and the 2nd rake are discharged from ditch, effectively therefore, it is possible to obtain outstanding casting performance.Therefore, air-inflation tyre of the present invention can play good road performance, sand road performance.
Accompanying drawing explanation
Fig. 1 is the expansion drawing of the airtyred fetus face of an embodiment of the invention.
Fig. 2 is the enlarged drawing of the tread of the pattern block on tire shoulder of Fig. 1.
Fig. 3 is the enlarged drawing of the tread of the center running lug of Fig. 1.
Fig. 4 is the center running lug of Fig. 1 and the enlarged drawing of pattern block on tire shoulder.
Description of reference numerals:
1 ... air-inflation tyre; 2 ... fetus face; 3 ... pattern block on tire shoulder; 3a ... the tread of pattern block on tire shoulder; 4 ... center running lug; 4a ... the tread of center running lug; 6 ... flat pitch portion; 7 ... steep rake; 15 ... 1st rake; 16 ... 2nd rake; Te ... tyre surface end.
Detailed description of the invention
Below, based on accompanying drawing, enforcement of the present invention mode is described.
Fig. 1 is the expansion drawing of the fetus face 2 of the air-inflation tyre 1 representing an embodiment of the invention.The air-inflation tyre of present embodiment (following, sometimes referred to as " tire ") 1 is such as suitable as the tire in full season of four-wheel-drive vehicle.
As shown in Figure 1, the fetus face 2 of tire 1 is provided with the center running lug 4 inside the pattern block on tire shoulder 3 being configured at tyre surface end Te side and the tire axial being configured at pattern block on tire shoulder 3.The fetus face 2 of present embodiment is provided with: a pair pattern block on tire shoulder row 3R having multiple pattern block on tire shoulder 3 along tire circumferential array; A pair center running lug row 4R of multiple center running lug 4 is had along tire circumferential array; And the ditch 5 extended between pattern block on tire shoulder 3,3, between center running lug 4,4 or between pattern block on tire shoulder 3 and center running lug 4.
Above-mentioned " tyre surface end " Te be defined as to be installed on regular wheel rim and the tire 1 being filled with the non-loaded normal state of regular interior pressure load regular load and with 0 be outside one's consideration inclination angle be grounded on plane time the outermost earthing position of tire axial.Under normal state, the distance of the tire axial between two tyre surface end Te, Te is defined as tyre surface ground connection width TW.When without special version, the size etc. in each portion of tire is the value measured under normal state.
" regular wheel rim " refers in the schematism of the specification comprising tire institute foundation, the wheel rim of this specification is specified by each tire, if such as JATMA is then " standard rim ", if TRA is then " Design Rim ", if ETRTO is then " Measuring Rim ".
" regular interior pressure " refers in the schematism of the specification comprising tire institute foundation, the air pressure of each specification is specified by each tire, if JATMA is then " most high air pressure ", if the maxim of TRA then for recording in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATIONPRESSURES ", if ETRTO is then " INFLATIONPRESSURE ".When tire be car use, regular interior pressure is 180kPa.
" regular load " refers in the schematism of the specification comprising tire institute foundation, the load of each specification is specified by each tire, if JATMA is then " maximum load capability ", if the maxim of TRA then for recording in table " TIRE LOAD LIMITS AT VARIOUS COLD INFLATIONPRESSURES ", if ETRTO is then " LOADCAPACITY ".When tire be car use, regular load be equivalent to above-mentioned load 88% load.
Fig. 2 is the enlarged drawing of the tread 3a of the pattern block on tire shoulder 3 of Fig. 1.As shown in Figure 2, the tread 3a of pattern block on tire shoulder 3 has: the flat pitch portion 6 extended inside tire axial with the angle θ 1 of less than 15 degree relative to tire axial from tyre surface end Te side and being connected with flat pitch portion 6 and the steep rake 7 tilted with the angle θ 2 being greater than flat pitch portion 6 relative to tire axial.This pattern block on tire shoulder 3 is out of shape due to the load from road surface, thus between flat pitch portion 6 and steep rake 7, (the A portion of Fig. 2) can effectively catch earth, gravel etc. (following, sometimes referred to as " earth etc. ").Therefore, it is possible to obtain the ground large traction property of unfairness, thus improve road performance, sand road performance.In this manual, each pattern block is the angle of the pattern block line of centers that the intermarginal midway location of a pair pattern block being extended by the length direction along pattern block links swimmingly relative to the angle of tire axial.In fig. 2, the pattern block line of centers 3c of pattern block on tire shoulder 3 is indicated.In addition, in fig. 2, for convenience of explanation, tire shoulder band ditch described later and tire shoulder cutter groove is eliminated.
In the present embodiment, flat pitch portion 6 is roughly trapezoidal shape, have extend along tire circumference in the outermost of tire axial outermost lateral margin 8, from the two ends of outermost lateral margin 8 inside tire axial and a pair that extends substantially in parallel axial edge 9,9.This flat pitch portion 6 reduces the casting resistance along the ditch 5 between the adjacent flat pitch portion 6,6 of tire circumference, therefore, it is possible to improve road performance, sand road performance.
The outermost lateral margin 8 of present embodiment comprises the 1st outermost lateral margin 8a be arranged on tyre surface end Te and compares tyre surface end Te more by the 2nd outermost lateral margin 8b of the position inside tire axial with being arranged at.Thus, pattern block on tire shoulder 3 be divided into there is the 1st outermost lateral margin 8a the 1st pattern block on tire shoulder 3A, with there is the 2nd pattern block on tire shoulder 3B of the 2nd outermost lateral margin 8b.In the present embodiment, the 1st pattern block on tire shoulder 3A and the 2nd pattern block on tire shoulder 3B is arranged alternately along tire circumference.Earth between pattern block on tire shoulder 3,3 etc. can be discharged to tyre surface end Te side by this 2nd pattern block on tire shoulder 3B swimmingly, therefore improves casting performance.
Axial edge 9 linearly extends.Thus, earth etc. are easier discharges from tyre surface end Te.In addition, axial edge also can be zig-zag or wavy.
When flat pitch portion 6 is greater than 15 degree relative to the angle θ 1 of tire axial, the differential seat angle of itself and steep rake 7 reduces, thus effectively cannot catch earth etc.Therefore, the angle θ 1 in flat pitch portion 6 is preferably less than 12 degree.
The angle θ 1 in flat pitch portion 6 is preferably greater than 0 degree.Thus, the rigidity of the tire axial in flat pitch portion 6 reduces effectively, thus promotes the distortion in flat pitch portion 6.From this viewpoint, the angle θ 1 in flat pitch portion 6 is more preferably more than 5 degree.
Steep rake 7 comprises the 3rd pattern block edge 10c dividing the 1st pattern block edge 10a inside tire axial, the 2nd pattern block edge 10b outside division tire axial and linked by the 1st pattern block edge 10a and the 2nd pattern block edge 10b.In addition, imaginary line is utilized to divide steep rake 7 and flat pitch portion 6.
1st pattern block edge 10a has inside arc sections 11, and it has center c1 in tyre surface end Te side.This inside arc sections 11 increases the rigidity of steep rake 7, improves the shearing force relative to earth etc., thus can improve sand road performance, road performance.The inside arc sections 11 of present embodiment is formed in the whole length of the 1st pattern block edge 10a.In addition, the inside arc sections 11 of present embodiment is the different plural circular arc continuous print mode swimmingly of radius of curvature, and along with postponing, rake 6 is separated, and radius of curvature r1 increases.Thus, the distortion of steep rake 7 becomes smooth and easy, thus can catch earth etc. efficiently.In addition, inside arc sections also can be such as the circular arc of single radius of curvature.The radius of curvature r1 of inside arc sections 11 is such as preferably about 30 ~ 100mm.
Though without particular limitation of, in order to make the rigidity of steep rake 7 best, the length L1 of the tire circumference of the 1st pattern block edge 10a is preferably 65% ~ 80% of a pitch P of pattern block on tire shoulder 3.From identical viewpoint, the 1st pattern block edge 10a is preferably 45 ~ 50 degree relative to the angle [alpha] 1 of tire axial.In addition, the angle [alpha] 1 of the 1st pattern block edge 10a is the average angle in the length of the 1st pattern block edge 10a.
2nd pattern block edge 10b tilts to the direction identical with the 1st pattern block edge 10a.Thus, the rigidity of steep rake 7 is even in length, thus can play large shearing force relative to earth etc., and then can improve traction property.
In the present embodiment, the 2nd pattern block edge 10b comprises the steep dip inclined tab 12 tilted with the angle [alpha] 2 of 40 ~ 60 degree relative to tire axial.In arbitrary situation of the load of the centnifugal force of this 2nd pattern block edge 10b when turning driving and tire circumference when travelling of keeping straight on, steep rake 7 can both be made easily to be out of shape.Therefore, it is possible to more easily catch earth etc. between steep rake 7 and flat pitch portion 6, therefore improve road performance, sand road performance.The steep dip inclined tab 12 of present embodiment is linearly formed in the whole length of the 2nd pattern block edge 10b.Therefore, above-mentioned action effect is improved further.
3rd pattern block edge 10c with contrary with the 1st pattern block edge 10a towards inclination.Thus, guarantee that the rigidity of the inboard portion of the tire axial of steep rake 7 is high, thus large shearing force can be played relative to earth etc.
3rd pattern block edge 10c is preferably 5 ~ 30 degree relative to the angle [alpha] 3 of tire axial.Thereby, it is possible to the earth etc. in the ditch 5 arranged along steep rake 7 is discharged to tyre surface end Te side by large transverse force when utilizing turning driving.
The length L2 of the tire axial in flat pitch portion 6 is preferably 0.4 ~ 1.2 with the ratio (L2/L3) of the length L3 of the tire axial of steep rake 7.Thus, length L2, the L3 of angle θ 1, the θ 2 of flat pitch portion 6 and the tire axial of steep rake 7 and flat pitch portion 6, steep rake 7 match, thus balancedly play relative to earth etc. shearing force and effectively catch the effect of earth, and then sand road performance, road performance can be improved.In order to effectively play this effect, the above-mentioned length L3 of steep rake 7 is preferably 6% ~ 16% of tyre surface ground connection width TW.
As shown in Figure 1, pattern block on tire shoulder 3 is provided with and extends inside tire axial and the tire shoulder band ditch 13 forming terminal in pattern block on tire shoulder 3 and the tire shoulder cutter groove 14 linked by the inner 13e of the tire axial of tire shoulder band ditch 13 and the 3rd pattern block edge 10c from outermost lateral margin 8.This tire shoulder band ditch 13 and tire shoulder cutter groove 14 reduce the rigidity of pattern block on tire shoulder 3 effectively, make flat pitch portion 6 easy with the distortion of steep rake 7, promote to catch earth etc., thus improve traction property, braking force.
Center running lug 4 has: the 1st rake 15 that its tread 4a tilts to the direction that the steep rake 7 with pattern block on tire shoulder 3 is identical and be connected with the 1st rake 15 and roll the 2nd oblique rake 16 with contrary with the 1st rake 15 towards to tyre surface end Te.Thus, at center running lug 4, the 1st rake 15 and the 2nd rake 16 are also out of shape due to load, thus effectively can catch earth etc. between which.Therefore, it is possible to obtain the ground large traction property of unfairness.
Fig. 3 is the enlarged drawing of the tread 4a of center running lug 4.As shown in Figure 3, the length of the tire circumference of the 1st rake 15 is larger than the 2nd rake 16.Thus, the 1st rake 15 to the 2 rake 16 has larger power from road surface effect, and the deflection therefore during the 1st rake 15 to the 2 rake 16 ground connection is large.Therefore, when ground connection, the 1st rake 15, the 2nd rake 16 carry out unbalanced distortion, thus the earth, gravel etc. caught by the 1st rake 15 and the 2nd rake 16 are discharged from ditch 5, effectively therefore, it is possible to obtain outstanding casting performance.Especially, by the center running lug 4 being difficult to the tire equator C side of discharging earth etc. is formed as this shape, above-mentioned effect can effectively be played.The length of the pattern block line of centers 4c of tread 4a is utilized to represent the length of the tire circumference of the 1st rake 15 and the 2nd rake 16.In figure 3, for convenience of explanation, central cutter groove described later is eliminated.
The length L4 of the tire circumference of the 1st rake 15 is preferably about 1.2 ~ 3.0 times of the length L5 of the tire circumference of the 2nd rake 16.When 1.2 times of length L5 less than the 2nd rake 16 of the length L4 of the 1st rake 15, or when 3.0 times of length L5 more than the 2nd rake 16 of the length L4 of the 1st rake 15, the rigid balancing of the 1st rake 15 and the 2nd rake 16 excessively reduces, thus there is the worry of road performance and sand road degradation.
From the viewpoint effectively playing above-mentioned effect, the length L6 of the tire axial of the 1st rake 15 is preferably 4 ~ 8 times of the length L7 of the tire axial of the 2nd rake 16.
As shown in Figure 4, the steep rake 7 that is configured to across ditch 5b and pattern block on tire shoulder 3 of the 1st rake 15 is continuous.Thus, along between the adjacent steep rake 7,7 of tire circumference and be formed with one article of smooth ditch 5a between the 1st rake 15,15.Thereby, it is possible to easily discharged from tyre surface end Te by the earth etc. in this ditch 5a, therefore improve casting performance.In addition, " continuously " to be the 1st imaginary line 10e that instigates the 1st pattern block edge 10a in the oblique portion of steep dip 7 to extend swimmingly to tire equator C side with the arbitrary imaginary line and the described later 2nd in the 2nd imaginary line 10i making the 2nd pattern block edge 20b extend swimmingly to tire equator C side link mode that edge 19 is communicated with.
As shown in Figure 3, the 1st rake 15 has: the side pattern block edge 17 towards tire equator C side, the outside pattern block edge 18 towards tyre surface end Te side and side pattern block edge 17 and outside pattern block edge 18 are linked in tyre surface end Te side the 1st link edge 19.
Side pattern block edge 17 and outside pattern block edge 18 tilt in the same direction relative to tire axial.Thereby, it is possible to the rigidity maintaining the 1st rake 15 is high, thus play large shearing force relative to earth etc.
Side pattern block edge 17 is included in tire equator C side to be had the 1st arc sections 20 of center c2 and has the 2nd arc sections 21 of center c3 in tyre surface end Te side.This 1st arc sections 20 makes the 1st rake 15 effectively be out of shape when ground connection, thus can catch earth etc.In addition, for the 1st arc sections 20, the 2nd arc sections 21 of earth etc. can be caught also to improve the rigidity of the 1st rake 15, thus the shearing force relative to earth can be played.
1st arc sections 20 is connected with the 2nd arc sections 21 by the side pattern block edge 17 of present embodiment swimmingly.Thereby, it is possible to improve the shearing force relative to earth further.
2nd arc sections 21 is arranged at compares the 1st arc sections 20 more by inside tire axial, namely more by the 2nd rake 16 side.Thus, the 1st arc sections 20 side is more effectively out of shape for fulcrum with the 2nd arc sections 21.In addition, by there being arranged outside the 1st arc sections 20 of the tire axial of large transverse force in effect, thus when turning driving, the 1st rake 15 is significantly out of shape, and more effectively can catch earth etc., therefore improves road performance, sand road performance further.
The radius of curvature r2 of this 1st arc sections 20 is preferably 30 ~ 60mm.When the radius of curvature r2 of the 1st arc sections 20 is less than 30mm, the earth caught cannot be discharged swimmingly, thus there is the worry of casting degradation by the 1st arc sections 20.When the radius of curvature r2 of the 1st arc sections 20 is more than 60mm, the 1st arc sections 20 cannot be utilized effectively to catch earth, thus there is the worry that cannot improve traction.
In order to balancedly guarantee the rigidity of center running lug 4, the ditch area with ditch 5, the radius of curvature r3 of the 2nd arc sections 21 is preferably 30 ~ 80mm.
As shown in Figure 4, though without particular limitation of, the length L8 of the tire circumference of side pattern block edge 17 is 0.65 ~ 0.70 times of a pitch P of pattern block on tire shoulder 3.In addition, side pattern block edge 17 is 45 ~ 55 degree relative to the angle [alpha] 4 of tire axial.Thus, make the rigidity of the 1st rake 15 best, thus improve sand road performance.In addition, the angle [alpha] 4 of side pattern block edge 17 is the average angle in the length of side pattern block edge 17.
The tire circumferential lengths L9 of the overlapping region Kr that side pattern block edge 17 is overlapping on tire axial with the 1st pattern block edge 10a, is preferably 0.50 ~ 0.60 times of a pitch P of pattern block on tire shoulder 3.Thereby, it is possible to balancedly guarantee the rigidity of pattern block on tire shoulder 3 and center running lug 4, thus the distortion of each pattern block 3,4 can be promoted and effectively catch earth etc., and the shearing force relative to earth etc. can be played.
Outside pattern block edge 18 is included in tire equator C side and has the 3rd arc sections 22 of center c4 and the recess 23 to tire equator C side depression.In the present embodiment, the 3rd arc sections 22 matches with the 1st arc sections 20, guarantees the width of the 1st rake 15 and maintains its rigidity.The radius of curvature r4 of the 3rd arc sections 22 is preferably identical with the radius of curvature r1 of the 1st arc sections 20.
Recess 23 is arranged at compares outside pattern block edge 18 more by the 2nd rake 16 side.Therefore, recess 23 reduces the rigidity near the cross-shaped portion of the 1st rake 15 and the 2nd rake 16, promotes the distortion of center running lug 4 further, more effectively can catch earth etc., thus improves road performance, sand road performance further.The length L10 of the tire axial of this recess 23 is preferably 50% ~ 80% of the tire axial length L11 of outside pattern block edge 18.
As shown in Figure 3, the 1st links edge 19 with contrary with side pattern block edge 17 towards inclination.The decorative pattern rigidity that this 1st link edge 19 maintains the tire axial Outboard Sections of the 1st rake 15 is high.In addition, the 1st link edge 19 and the 3rd pattern block edge 10c tilt substantially in parallel.Thus, match with the regulation of the above-mentioned angle [alpha] 1 of the 1st pattern block edge 10a and the angle θ 1 in flat pitch portion 6, be obtuse angle by the angle of inclination along the tire adjacent pattern block on tire shoulder 3,3 of circumference and the ditch 5a that formed of center running lug 4,4 and ditch 5b, therefore each pattern block 3,4 becomes easy distortion, thus more easily can catch earth etc.
In the present embodiment, the 2nd rake 16 comprise to be connected with side pattern block edge 17 and divide the medial margin 24 of the tire equator C side of the 2nd rake 16, be connected with outside pattern block edge 18 and divide the tyre surface end Te side of the 2nd rake 16 lateral border 25 and medial margin 24 and lateral border 25 are linked the 2nd link edge 26.Medial margin 24 and the 2nd links edge 26 with mutually opposite towards inclination.Thereby, it is possible to guarantee that the rigidity of the end side of the 2nd rake 16 is high.
As shown in Figure 1, center running lug 4 has: link the 1st central cutter groove 29 that edge 26 and side pattern block edge 17 link by the 2nd and links the 2nd central cutter groove 30 that edge 19 and side pattern block edge 17 link by the 1st.This central cutter groove 29,30 suitably reduces the rigidity of center running lug 4, and deflection when guaranteeing the ground connection of the 1st rake 15 is large, thus earth etc. can be discharged swimmingly from ditch 5.
The ditch width of ditch 5 (is at right angles to measured with ditch line of centers.) W1 is not particularly limited, but from guaranteeing the rigidity of each pattern block 3,4 and the shearing force that improves relative to earth etc., and by the viewpoint that earth etc. is discharged effectively, be preferably 5 ~ 15% of tyre surface ground connection width TW.
Above, embodiments of the present invention are described in detail, but the present invention is not limited to illustrative embodiment, certainly can be deformed into various mode to implement.
[embodiment]
Specification based on table 1 has manufactured experimently the tire of the four-wheel-drive vehicle of the motif with Fig. 1, and tests road performance and sand road performance that each examination supplies tire.Each examination is as follows for the main common specification of tire, test method.
Tyre surface ground connection width TW:240mm
The height of center running lug: 17.1mm
The height of pattern block on tire shoulder: 17.1mm
< road performance, sand road performance >
With following condition, each examination is installed on whole wheels of the four-wheel drive vehicle of free air capacity 3600cc for tire.And, travelled at the test route of muddy road surface and road surfaces by test driver, traction property now and the ride characteristic relevant with casting or sediment outflow gravel are evaluated by the sense organ testing driver.Result is that the scoring being 5.0 by comparative example 1 represents.The larger expression of numerical value is better.
Size: 37 × 12.50R17
Wheel rim: 9.0JJ
Interior pressure: 100kPa
Test results etc. are as shown in table 1.
[table 1]
The tire that the result of testing can confirm embodiment improves road performance, sand road performance compared with the tire of comparative example.In addition, though make tire size change and carried out identical test, the trend identical with this test result is shown.
Claims (6)
1. an air-inflation tyre, its pattern block on tire shoulder being configured at tyre surface side fetus face being provided with and be configured at described pattern block on tire shoulder tire axial inside center running lug, it is characterized in that,
The tread of described pattern block on tire shoulder has: the flat pitch portion extended inside tire axial with the angle of less than 15 degree relative to tire axial from tyre surface side and be connected with described flat pitch portion and have the steep rake of the angle being greater than described flat pitch portion relative to tire axial
The tread of described center running lug has: the 1st rake tilted to the direction that the described steep rake with described pattern block on tire shoulder is identical and to be connected with described 1st rake and with contrary with described 1st rake towards the 2nd rake tilted to tyre surface side
The length of the tire circumference of described 1st rake is larger than described 2nd rake.
2. air-inflation tyre according to claim 1, is characterized in that,
The described steep rake of described pattern block on tire shoulder and described 1st rake of described center running lug are configured to via ditch continuously.
3. air-inflation tyre according to claim 1 and 2, is characterized in that,
Described pattern block on tire shoulder has the 1st pattern block edge inside the tire axial dividing described steep rake,
Described 1st pattern block edge is included in the arc sections that tyre surface side has center.
4. the air-inflation tyre according to any one in claims 1 to 3, is characterized in that,
Described pattern block on tire shoulder has the 2nd pattern block edge outside the tire axial dividing described steep rake,
Described 2nd pattern block edge comprises relative to tire axial with the steep dip inclined tab of the angular slope of 40 ~ 60 degree.
5. the air-inflation tyre according to any one in Claims 1 to 4, is characterized in that,
Described 1st rake of described center running lug has towards the side pattern block edge of tire equator side,
Described side pattern block edge is included in the arc sections that tire equator side has center.
6. the air-inflation tyre according to any one in Claims 1 to 5, is characterized in that,
Described flat pitch portion is greater than 0 degree relative to the angle of tire axial.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-083024 | 2014-04-14 | ||
| JP2014083024A JP6006742B2 (en) | 2014-04-14 | 2014-04-14 | Pneumatic tire |
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| Publication Number | Publication Date |
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| CN104972843A true CN104972843A (en) | 2015-10-14 |
| CN104972843B CN104972843B (en) | 2018-06-05 |
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| CN201510165804.1A Active CN104972843B (en) | 2014-04-14 | 2015-04-09 | Pneumatic tire |
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| JP (1) | JP6006742B2 (en) |
| CN (1) | CN104972843B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017081439A (en) * | 2015-10-29 | 2017-05-18 | 住友ゴム工業株式会社 | Pneumatic tire |
| CN108340739A (en) * | 2017-01-25 | 2018-07-31 | 住友橡胶工业株式会社 | Tire |
| CN110214090A (en) * | 2017-03-06 | 2019-09-06 | 横滨橡胶株式会社 | Pneumatic tire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6085317B2 (en) * | 2015-01-09 | 2017-02-22 | 住友ゴム工業株式会社 | Pneumatic tire |
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| CN103140360A (en) * | 2010-09-30 | 2013-06-05 | 株式会社普利司通 | Pneumatic tire |
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| CN1270908C (en) * | 2001-02-28 | 2006-08-23 | 倍耐力轮胎公司 | Tyre tread for motor vehicles, particularly for snow-covered ground |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2017081439A (en) * | 2015-10-29 | 2017-05-18 | 住友ゴム工業株式会社 | Pneumatic tire |
| CN108340739A (en) * | 2017-01-25 | 2018-07-31 | 住友橡胶工业株式会社 | Tire |
| CN110214090A (en) * | 2017-03-06 | 2019-09-06 | 横滨橡胶株式会社 | Pneumatic tire |
| CN110214090B (en) * | 2017-03-06 | 2021-07-06 | 横滨橡胶株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6006742B2 (en) | 2016-10-12 |
| CN104972843B (en) | 2018-06-05 |
| JP2015202777A (en) | 2015-11-16 |
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