CN104972843B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- CN104972843B CN104972843B CN201510165804.1A CN201510165804A CN104972843B CN 104972843 B CN104972843 B CN 104972843B CN 201510165804 A CN201510165804 A CN 201510165804A CN 104972843 B CN104972843 B CN 104972843B
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Abstract
The present invention provides pneumatic tire (1), improves road performance and sand road performance.The pneumatic tire (1) is provided with pattern block on tire shoulder (3) and center running lug (4).The tread (3a) of pattern block on tire shoulder (3) has：It is connected from tyre surface end (Te) side compared with tire axial with less than 15 degree of angle to the low-angle dip portion (6) of extension on the inside of tire axial and with low-angle dip portion (6) and there is the steep dip inclined portion (7) of the angle more than low-angle dip portion (6) compared with tire axial.The tread (4a) of center running lug (4) has：It is connected to direction inclined 1st rake (15) identical with the steep dip inclined portion (7) of pattern block on tire shoulder (3) and with the 1st rake (15) and with the direction opposite with the 1st rake (15) to inclined 2nd rake (16) in tyre surface end (Te) side.The length of the tire circumferential direction of 1st rake (15) is bigger than the 2nd rake (16).
Description
Technical field
The present invention relates to the pneumatic tires for improving road performance and sand road performance.
Background technology
For the pneumatic tire of full season tire, M+S type running on rough terrain, for example, require slob,
Road surfaces play sufficient traction property, casting or the tophaceous so-called road performance of row, sand road performance.In order to improve mud
Road performance, sand road performance employ the tire that the pattern block pattern of multiple pattern blocks is provided in fetus face.The tread of pattern block
Shape have a significant impact to traction property, casting etc..
Patent document 1：Japanese Unexamined Patent Publication 5-38904 publications
The content of the invention
It is a primary object of the present invention to provide a kind of pneumatic tire, improve center running lug and pattern block on tire shoulder
The shape of tread as basic, can play good road performance and sand road performance.
The present invention relates to pneumatic tires, and pattern block on tire shoulder and the configuration for being configured at tyre surface end are provided in fetus face
Center running lug on the inside of the tire axial of above-mentioned pattern block on tire shoulder, which is characterized in that the tread tool of above-mentioned pattern block on tire shoulder
Have：From tyre surface end compared with tire axial with less than 15 degree of angle to the low-angle dip portion of extension on the inside of tire axial and with
Above-mentioned low-angle dip portion connects and has the steep dip inclined portion of the angle more than above-mentioned low-angle dip portion compared with tire axial, in above-mentioned
The tread of centre pattern block has：To direction inclined 1st rake identical with the above-mentioned steep dip inclined portion of above-mentioned pattern block on tire shoulder,
It connects with above-mentioned 1st rake and is tilted with the direction opposite with above-mentioned 1st rake to tyre surface end side the inclined 2nd
Portion, the length of the tire circumferential direction of above-mentioned 1st rake are bigger than above-mentioned 2nd rake.
The pneumatic tire of the present invention is preferably above-mentioned steep dip inclined portion and the above-mentioned center running lug of above-mentioned pattern block on tire shoulder
Above-mentioned 1st rake is configured to via ditch and continuous.
The pneumatic tire of the present invention is preferably that above-mentioned pattern block on tire shoulder has in the tire axial for dividing above-mentioned steep dip inclined portion
1st pattern block edge of side, above-mentioned 1st pattern block edge are included in the arc sections that tyre surface end has center.
The pneumatic tire of the present invention is preferably that above-mentioned pattern block on tire shoulder has outside the tire axial for dividing above-mentioned steep dip inclined portion
2nd pattern block edge of side, above-mentioned 2nd pattern block edge include oblique with the steep dip of 40~60 degree of angle tilt compared with tire axial
Piece.
The pneumatic tire of the present invention is preferably that above-mentioned 1st rake of above-mentioned center running lug has towards tire equator
The side pattern block edge of side, above-mentioned side pattern block edge are included in the arc sections that tire equator side has center.
The pneumatic tire of the present invention is preferably that above-mentioned low-angle dip portion is more than 0 degree compared with the angle of tire axial.
The fetus face of the pneumatic tire of the present invention is provided with pattern block on tire shoulder and center running lug.Pattern block on tire shoulder is stepped on
Face has：From tyre surface end compared with tire axial with less than 15 degree of angle to the low-angle dip portion of extension on the inside of tire axial,
It is connected with low-angle dip portion and there is the steep dip inclined portion of the angle more than low-angle dip portion compared with tire axial.Center running lug
Tread have：Connect to direction inclined 1st rake identical with the steep dip inclined portion of pattern block on tire shoulder and with the 1st rake
It connects and with the direction opposite with the 1st rake to inclined 2nd rake in tyre surface end side.Fetus face with above-mentioned pattern block
Soil, gravel can be effectively caught between low-angle dip portion and steep dip inclined portion and between the 1st rake and the 2nd rake
Deng.Therefore, it is possible to obtain the big traction property on out-of-flatness ground.
The length of the tire circumferential direction of 1st rake is bigger than above-mentioned 2nd rake.The 1st rake is than the 2nd rake as a result,
From road surface, effect has the power of bigger, therefore deflection when the 1st rake is grounded than the 2nd rake is big.Therefore, in ground connection,
1st rake, the 2nd rake carry out unbalanced deformation, so as to soil, the gravel caught by the 1st rake and the 2nd rake
It is effectively discharged out Deng from ditch, therefore outstanding casting performance can be obtained.Therefore, pneumatic tire of the invention can play well
Road performance, sand road performance.
Description of the drawings
Fig. 1 is the expanded view of the fetus face of the pneumatic tire 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.
Reference sign：
1 ... pneumatic tire；2 ... fetus faces；3 ... pattern block on tire shoulders；The tread of 3a ... pattern block on tire shoulders；4 ... central decorative patterns
Block；The tread of 4a ... center running lugs；6 ... low-angle dip portions；7 ... steep dip inclined portions；15 ... the 1st rakes；16 ... the 2nd rakes；
Te ... tyre surface ends.
Specific embodiment
Hereinafter, one mode of the implementation of the present invention is illustrated based on attached drawing.
Fig. 1 is the expanded view of the fetus face 2 for the pneumatic tire 1 for representing an embodiment of the invention.Present embodiment
Pneumatic tire (following, sometimes referred to simply as " tire ") 1 be for example suitable as the full season tire of four-wheel-drive vehicle.
As shown in Figure 1, tire 1 fetus face 2 be provided be configured at tyre surface end Te sides pattern block on tire shoulder 3 and configuration
Center running lug 4 on the inside of the tire axial of pattern block on tire shoulder 3.The fetus face 2 of present embodiment is provided with：It is circumferential along tire
It is arranged with a pair of of pattern block on tire shoulder row 3R of multiple pattern block on tire shoulders 3；Have the one of multiple center running lugs 4 along tire circumferential array
To center running lug row 4R；And between pattern block on tire shoulder 3,3, between center running lug 4,4 or pattern block on tire shoulder 3 in
The ditch 5 extended between the pattern block 4 of centre.
Above-mentioned " tyre surface end " Te be defined as to be installed on regular wheel rim and filled with regular internal pressure it is non-loaded just
The tire 1 of rule state load regular load and with 0 be outside one's consideration inclination angle be grounded on plane when the outermost earthing position of tire axial.
Under normal state, the distance of the tire axial between two tyre surface ends Te, Te is defined as tyre surface ground width TW.It is especially said in nothing
In the case of bright, the size in each portion of tire etc. is the value measured under normal state.
" regular wheel rim " refers in the schematism of the specification comprising tire institute foundation, and the specification is provided by each tire
Wheel rim, such as if JATMA then for " standard rim ", be then " Design Rim " if TRA, be then if ETRTO
“Measuring Rim”。
" regular internal pressure " refers in the schematism of the specification comprising tire institute foundation, and each specification is provided by each tire
Air pressure, be then table " TIRE LOAD LIMITS AT if TRA if JATMA then for " highest air pressure "
Maximum described in VARIOUS COLD INFLATION PRESSURES " is then " INFLATION if ETRTO
PRESSURE”.In the case where tire is used for car, regular internal pressure is 180kPa.
" regular load " refers in the schematism of the specification comprising tire institute foundation, and each specification is provided by each tire
Load, be then table " TIRE LOAD LIMITS AT VARIOUS if TRA if JATMA then for " maximum load capability "
Maximum described in COLD INFLATION PRESSURES " is then " LOAD CAPACITY " if ETRTO.It is in tire
In the case that car is used, regular load is to be equivalent to 88% load of above-mentioned 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 Fig. 2, the tread 3a tools of pattern block on tire shoulder 3
Have：From tyre surface end Te sides compared with tire axial with less than 15 degree of angle, θ 1 to the low-angle dip portion 6 of extension on the inside of tire axial,
And it is connected with low-angle dip portion 6 and is more than the 2 inclined steep dip inclined portion 7 of angle, θ in low-angle dip portion 6 compared with tire axial.This
Kind pattern block on tire shoulder 3 is deformed due to the load from road surface, so as to (Fig. 2 between low-angle dip portion 6 and steep dip inclined portion 7
A portions) effectively catch soil, gravel etc. (following, sometimes referred to simply as " soil etc. ").Therefore, it is possible to obtain out-of-flatness ground
On big traction property, thus improve road performance, sand road performance.In the present specification, each pattern block is compared with tire axial
Angle be the pattern block for swimmingly linking in the intermarginal centre position of a pair of of the pattern block extended along the length direction of pattern block
The angle of center line.In fig. 2, there is shown the pattern block center line 3c of pattern block on tire shoulder 3.In addition, in fig. 2, for the ease of
Illustrate, eliminate aftermentioned tire shoulder band ditch and tire shoulder cutter groove.
In the present embodiment, low-angle dip portion 6 is generally trapezoidal shape, all along tire with the outermost in tire axial
To the outermost lateral margin 8 of extension, from the both ends of outermost lateral margin 8 to tire axial the inside and a pair extended substantially in parallel is axial
Edge 9,9.This low-angle dip portion 6 reduces the casting resistance along the ditch 5 between the circumferentially-adjacent low-angle dip portion 6,6 of tire, therefore can
Improve road performance, sand road performance.
The outermost lateral margin 8 of present embodiment includes the 1st outermost lateral margin 8a that is arranged on tyre surface end Te and compares with being arranged at
Tyre surface end Te more depends on the 2nd outermost lateral margin 8b of the position of tire axially inner side.Pattern block on tire shoulder 3 is divided into the 1st as a result,
The 1st pattern block on tire shoulder 3A of outermost lateral margin 8a, the 2nd pattern block on tire shoulder 3B with having the 2nd outermost lateral margin 8b.In present embodiment
In, the 1st pattern block on tire shoulder 3A and the 2nd pattern block on tire shoulder 3B is circumferentially arranged alternately along tire.This 2nd pattern block on tire shoulder 3B can
Soil between pattern block on tire shoulder 3,3 etc. swimmingly to tyre surface end Te sides is discharged, therefore improves casting performance.
Axial edge 9 linearly extends.Soil etc. is easier to discharge from tyre surface end Te as a result,.In addition, axial edge also may be used
Think zigzag or wavy.
In the case of being more than 15 degree compared with the angle, θ 1 of tire axial in low-angle dip portion 6, the angle with steep dip inclined portion 7
Subtractive is small, so as to can not effectively catch soil etc..Therefore, the angle, θ 1 in low-angle dip portion 6 is preferably less than 12 degree.
The angle, θ 1 in low-angle dip portion 6 is preferably greater than 0 degree.The rigidity of the tire axial in low-angle dip portion 6 effectively drops as a result,
It is low, so as to promote the deformation in low-angle dip portion 6.From the point of view of this viewpoint, the angle, θ 1 in low-angle dip portion 6 is more preferably 5 degree or more.
Steep dip inclined portion 7 includes the 1st pattern block edge 10a on the inside of division tire axial, the 2nd flower on the outside of division tire axial
Line block edge 10b and the 3rd pattern block edge 10c for linking the 1st pattern block edge 10a and the 2nd pattern block edge 10b.In addition, it utilizes
Imaginary line division steep dip inclined portion 7 and low-angle dip portion 6.
1st pattern block edge 10a has inside arc sections 11, has center c1 in tyre surface end Te sides.It is this to Inner arc
Portion 11 increases the rigidity of steep dip inclined portion 7, the shearing force compared with soil etc. is improved, so as to improve sand road performance, road
Energy.The inside arc sections 11 of present embodiment are formed in the whole length of the 1st pattern block edge 10a.In addition, present embodiment
Inside arc sections 11 are the different more than two circular arcs of radius of curvature swimmingly continuous mode, and with postponing, rake 6 divides
From radius of curvature r1 increases.The deformation of steep dip inclined portion 7 becomes smooth as a result, so as to efficiently catch soil etc..In addition,
Inside arc sections are for example or the circular arc of single radius of curvature.Inwardly the radius of curvature r1 of arc sections 11 is for example preferably
30~100mm or so.
Though it is not particularly limited, in order to make the rigidity of steep dip inclined portion 7 optimal, the length of the tire circumferential direction of the 1st pattern block edge 10a
Degree L1 is preferably the 65%~80% of a pitch P of pattern block on tire shoulder 3.From the viewpoint of identical, the 1st pattern block edge 10a
Angle [alpha] 1 compared with tire axial is preferably 45~50 degree.In addition, the angle [alpha] 1 of the 1st pattern block edge 10a is in the 1st pattern block
Average angle in the length of edge 10a.
2nd pattern block edge 10b is tilted to the direction identical with the 1st pattern block edge 10a.The rigidity of steep dip inclined portion 7 exists as a result,
In length uniformly, so as to compared with the big shearing force of the performances such as soil, and then traction property can be improved.
In the present embodiment, the 2nd pattern block edge 10b includes tilting with 40~60 degree of angle [alpha] 2 compared with tire axial
Steep dip inclined tab 12.The tire circumferential direction of centrifugal force and straight trip of this 2nd pattern block edge 10b in turning driving when driving
It under the either case of load, can be easily deformed steep dip inclined portion 7.Therefore, it is possible to steep dip inclined portion 7 and low-angle dip portion 6 it
Between more easily catch soil etc., therefore improve road performance, sand road performance.The steep dip inclined tab 12 of present embodiment is in the 2nd flower
It is linearly formed in the whole length of line block edge 10b.Therefore, above-mentioned effect is further improved.
3rd pattern block edge 10c is tilted with the direction opposite with the 1st pattern block edge 10a.Thus, it is ensured that the wheel of steep dip inclined portion 7
The rigidity of the inboard portion of tire axial direction is high, so as to compared with the big shearing force of the performances such as soil.
3rd pattern block edge 10c is preferably 5~30 degree compared with the angle [alpha] 3 of tire axial.Thereby, it is possible to utilize row of turning
Big cross force when sailing discharges soil in the ditch 5 set along steep dip inclined portion 7 etc. to tyre surface end Te sides.
The ratio between the length L2 of the tire axial in the low-angle dip portion 6 and length L3 of the tire axial of steep dip inclined portion 7 (L2/L3) is excellent
Elect 0.4~1.2 as.Angle, θ 1, θ 2 and the low-angle dip portion 6 of the tire axial of low-angle dip portion 6 and steep dip inclined portion 7, steep as a result,
Length L2, L3 of rake 7 is engaged, so as to balancedly play compared with soil etc. shearing force and effectively catch soil
Effect, and then sand road performance, road performance can be improved.In order to effectively play this effect, the above-mentioned length of steep dip inclined portion 7
It is preferably the 6%~16% of tyre surface ground width TW to spend L3.
Extend as shown in Figure 1, pattern block on tire shoulder 3 is provided with the inside from outermost lateral margin 8 to tire axial and in tire shoulder decorative pattern
The tire shoulder band ditch 13 and the inner end 13e and the 3rd pattern block edge by the tire axial of tire shoulder band ditch 13 for forming terminal in block 3
The tire shoulder cutter groove 14 of 10c connections.This tire shoulder band ditch 13 and tire shoulder cutter groove 14 effectively reduce the firm of pattern block on tire shoulder 3
Property, make low-angle dip portion 6 and the deformation of steep dip inclined portion 7 easy, soil etc. is caught in promotion, so as to improve traction property, brake force.
Center running lug 4 has：Its tread 4a is to the direction identical with the steep dip inclined portion 7 of pattern block on tire shoulder 3 the inclined 1st
It rake 15 and is connected with the 1st rake 15 and inclined to tyre surface end Te sides with the direction opposite with the 1st rake 15
2nd rake 16.As a result, in center running lug 4, the 1st rake 15 with the 2nd rake 16 also due to load and deform, so as to
Soil etc. can be effectively caught between them.Therefore, it is possible to obtain the big traction property on out-of-flatness ground.
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 circumferential direction of the 1st rake 15
2 rakes 16 of Du Bi are big.15 to the 2 rake 16 of the 1st rake has the power of bigger from road surface effect as a result, therefore the 1st inclines
Deflection when 2 rake 16 of inclined portion 15 to the is grounded is big.Therefore, in ground connection, the 1st rake 15, the 2nd rake 16 carry out
Unbalanced deformation, so that soil, gravel for being caught by the 1st rake 15 with the 2nd rake 16 etc. are effectively discharged out from ditch 5,
Therefore outstanding casting performance can be obtained.Especially, by the central decorative pattern for the tire equator C sides that will be difficult to discharge soil etc.
Block 4 is formed as this shape, can effectively play above-mentioned effect.Utilize the length table of the pattern block center line 4c of tread 4a
Show the length of the tire circumferential direction of the 1st rake 15 and the 2nd rake 16.In figure 3, for convenience of description, eliminate aftermentioned
Central cutter groove.
The length L4 of the tire circumferential direction of 1st rake 15 is preferably the 1.2 of the length L5 of the tire circumferential direction of the 2nd rake 16
~3.0 times or so.The 1st rake 15 length L4 less than 1.2 times of the length L5 of the 2nd rake 16 in the case of or
In the case where the length L4 of the 1st rake 15 is more than 3.0 times of length L5 of the 2nd rake 16, the 1st rake 15 and the 2nd
The rigid balancing of rake 16 excessively reduces, so as to which there are the worries of road performance and sand road degradation.
From the viewpoint of above-mentioned effect is effectively played, 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 2nd rake 16.
As shown in figure 4, the 1st rake 15 is configured as across the steep dip inclined portion 7 of ditch 5b and pattern block on tire shoulder 3 continuously.By
This, one article of smooth ditch 5a is formed between the steep dip inclined portion 7,7 circumferentially-adjacent along tire and between the 1st rake 15,15.By
This, can easily discharge soil in ditch 5a etc. from tyre surface end Te, therefore improve casting performance.In addition, " continuous " is
Instigate the 1st imaginary line 10e and make the 2nd flower that the 1st pattern block edge 10a of steep dip inclined portion 7 swimmingly extends to tire equator C sides
Any imaginary lines of the line block edge 20b into the 2nd imaginary line 10i that tire equator C sides swimmingly extend and the aftermentioned 2nd connection edge
The mode of 19 connections.
As shown in figure 3, the 1st rake 15 has：Side pattern block edge 17 towards tire equator C sides, towards tyre surface end
The outside pattern block edge 18 of Te sides and side pattern block edge 17 and outside pattern block edge 18 are linked in tyre surface end Te sides the
1 connection edge 19.
Side pattern block edge 17 tilts in the same direction with outside pattern block edge 18 compared with tire axial.As a result, can
The rigidity for enough maintaining the 1st rake 15 is high, so as to compared with the big shearing force of the performances such as soil.
Side pattern block edge 17, which is included in tire equator C sides, has the 1st arc sections 20 of center c2 and in tyre surface end Te sides
The 2nd arc sections 21 with center c3.This 1st arc sections 20 make the 1st rake 15 effectively deform in ground connection, so as to
Enough catch soil etc..In addition, for the 1st arc sections 20, the 2nd arc sections 21 of soil etc. can be caught also to improve the 1st and inclined
The rigidity of inclined portion 15, so as to play the shearing force compared with soil.
1st arc sections 20 are swimmingly connected by the side pattern block edge 17 of present embodiment with the 2nd arc sections 21.As a result,
The shearing force compared with soil can be further improved.
2nd arc sections 21 are arranged at compared to the 1st arc sections 20 more by tire axially inner side, i.e., more lean on 16 side of the 2nd rake.
20 side of the 1st arc sections is more effectively deformed with the 2nd arc sections 21 for fulcrum as a result,.In addition, by having big cross force in effect
Tire axial outside set the 1st arc sections 20, so as in turning driving the 1st rake 15 significantly deform, Neng Gougeng
Soil etc. is effectively caught, therefore further improves road performance, sand road performance.
The radius of curvature r2 of this 1st arc sections 20 is preferably 30~60mm.The 1st arc sections 20 radius of curvature r2 not
In the case of sufficient 30mm, the soil caught by the 1st arc sections 20 can not be smoothly discharged, so as to which there are casting degradations
Worry.In the case where the radius of curvature r2 of the 1st arc sections 20 is more than 60mm, can not effectively be caught using the 1st arc sections 20
Soil, so as in the presence of the worry that can not improve traction.
In order to balancedly ensure the rigidity of center running lug 4, the ditch area with ditch 5, the radius of curvature r3 of the 2nd arc sections 21
Preferably 30~80mm.
Though as shown in figure 4, being not particularly limited, the length L8 of the tire circumferential direction of side pattern block edge 17 is pattern block on tire shoulder
0.65~0.70 times of a 3 pitch P.In addition, side pattern block edge 17 is 45~55 compared with the angle [alpha] 4 of tire axial
Degree.The rigidity for making the 1st rake 15 as a result, is optimal, so as to improve sand road performance.In addition, the angle [alpha] 4 of side pattern block edge 17
It is the average angle in the length of inside pattern block edge 17.
The tire of the overlapping region Kr be overlapped on tire axial with the 1st pattern block edge 10a of side pattern block edge 17 is circumferential
0.50~0.60 times of length L9, preferably a pitch P of pattern block on tire shoulder 3.Thereby, it is possible to balancedly ensure tire shoulder decorative pattern
The rigidity of block 3 and center running lug 4 effectively catches soil etc. so as to promote the deformation of each pattern block 3,4, and
The shearing force compared with soil etc. can be played.
Outside pattern block edge 18 is included in 3rd arc sections 22 of the tire equator C sides with center c4 and to tire equator C
The concave recess portion 23 in side.In the present embodiment, the 3rd arc sections 22 are engaged with the 1st arc sections 20, it is ensured that the 1st rake 15
Width and maintain its rigidity.The radius of curvature r4 of 3rd arc sections 22 is preferably identical with the radius of curvature r1 of the 1st arc sections 20.
Recess portion 23 is arranged at more leans on 16 side of the 2nd rake compared to outside pattern block edge 18.Therefore, recess portion 23 reduces the 1st and inclines
Rigidity near the cross-shaped portion of 15 and the 2nd rake 16 of inclined portion further promotes the deformation of center running lug 4, can be stronger
Soil etc. is caught on ground, so as to further improve road performance, sand road performance.The length L10 of the tire axial of this recess portion 23 is excellent
Elect the 50%~80% of the tire axial length L11 of outside pattern block edge 18 as.
As shown in figure 3, the 1st connection edge 19 is tilted with the direction opposite with side pattern block edge 17.This 1st connection edge 19
The decorative pattern rigidity for maintaining the tire axial exterior portion of the 1st rake 15 is high.In addition, the 1st connection 19 and the 3rd pattern block edge of edge
10c is tilted substantially in parallel.As a result, with the above-mentioned angle [alpha] 1 of the 1st pattern block edge 10a and the rule of the angle, θ 1 in low-angle dip portion 6
Surely it is engaged, by inclining for the ditch 5a and ditch 5b that is formed along the circumferentially-adjacent pattern block on tire shoulder 3,3 of tire and center running lug 4,4
Rake angle is obtuse angle, therefore each pattern block 3,4 becomes to be easily deformed, so as to more easily catch soil etc..
In the present embodiment, the 2nd rake 16 includes being connected with side pattern block edge 17 and dividing the 2nd rake 16
The interior lateral margin 24 of tire equator C sides, the outside for the tyre surface end Te sides for being connected with outside pattern block edge 18 and dividing the 2nd rake 16
Edge 25 and the 2nd connection edge 26 for linking interior lateral margin 24 and lateral border 25.Interior lateral margin 24 is with the 2nd connection edge 26 with mutually mutual
Anti- direction tilts.Thereby, it is possible to ensure that the rigidity of the end side of the 2nd rake 16 is high.
As shown in Figure 1, center running lug 4 has：The 1st center that 2nd connection edge 26 is linked with side pattern block edge 17
Cutter groove 29 and the 2nd central cutter groove 30 for linking the 1st connection edge 19 with side pattern block edge 17.This center cutter groove 29,30 is suitable
Locality reduces the rigidity of center running lug 4, it is ensured that the deflection during ground connection of the 1st rake 15 is big, so as to by soil etc.
It is smoothly discharged from ditch 5.
The ditch width of ditch 5 (is at right angles to measured with ditch center line.) W1 is not particularly limited, but from ensure each pattern block 3,
4 rigidity and improve the shearing force compared with soil etc., and be preferably tyre surface from the viewpoint of soil etc. is effectively discharged out
The 5~15% of ground width TW.
More than, embodiments of the present invention are had been described in detail, but the present invention is not limited to embodiment illustrated, when
Various modes can be so deformed into be implemented.
【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 each examination
For the road performance of tire and sand road performance.Each examination is as follows for main common specification, the test method of tire.
Tyre surface ground width TW：240mm
The height of center running lug：17.1mm
The height of pattern block on tire shoulder：17.1mm
＜ roads performance, sand road performance ＞
Each examination is installed on to whole wheels of the four-wheel drive vehicle of capacity 3600cc with following conditions for tire.And
And travelled by testing driver in muddy road surface and the test route of road surfaces, by traction property at this time and with casting
Or the related ride characteristic of sediment outflow gravel is evaluated by the sense organ of test driver.The result is that by comparative example 1 be 5.0 scoring
To represent.Numerical value is bigger to represent the better.
Size：37×12.50R17
Wheel rim：9.0JJ
Internal pressure：100kPa
Test result etc. is as shown in table 1.
【Table 1】
The result of test is able to confirm that the tire of embodiment improves road performance, sand road compared with the tire of comparative example
Performance.Though in addition, changing tire size and having carried out identical test, the trend identical with the test result is shown.
Claims (6)
1. a kind of pneumatic tire there is provided the pattern block on tire shoulder for being configured at tyre surface end and is configured at the tire in fetus face
Center running lug on the inside of the tire axial of shoulder pattern block, which is characterized in that
The tread of the pattern block on tire shoulder has：From tyre surface end compared with tire axial with less than 15 degree of angle to tire axis
It the low-angle dip portion that extends inwardly and is connected with the low-angle dip portion and has compared with tire axial and be more than the low-angle dip
The steep dip inclined portion of the angle in portion,
The tread of the center running lug has：It is inclined to the direction identical with the steep dip inclined portion of the pattern block on tire shoulder
It 1st rake and is connected with the 1st rake and to incline with the low-angle dip portion, the steep dip inclined portion and the described 1st
The opposite direction of inclined portion to inclined 2nd rake in tyre surface end side,
The length of the tire circumferential direction of 1st rake is bigger than the 2nd rake.
2. pneumatic tire according to claim 1, which is characterized in that
The steep dip inclined portion of the pattern block on tire shoulder and the 1st rake of the center running lug be configured to via ditch and
Continuously.
3. pneumatic tire according to claim 1 or 2, which is characterized in that
The pattern block on tire shoulder has the 1st pattern block edge on the inside of the tire axial for dividing the steep dip inclined portion,
The 1st pattern block edge is included in the arc sections that tyre surface end has center.
4. pneumatic tire according to claim 1 or 2, which is characterized in that
The pattern block on tire shoulder has the 2nd pattern block edge on the outside of the tire axial for dividing the steep dip inclined portion,
The 2nd pattern block edge is included compared with tire axial with the steep dip inclined tab of 40~60 degree of angle tilt.
5. pneumatic tire according to claim 1 or 2, which is characterized in that
The 1st rake of the center running lug has the side pattern block edge towards tire equator side,
The side pattern block edge is included in the arc sections that tire equator side has center.
6. pneumatic tire according to claim 1 or 2, which is characterized in that
The low-angle dip portion is more than 0 degree compared with the angle of tire axial.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014083024A JP6006742B2 (en) | 2014-04-14 | 2014-04-14 | Pneumatic tire |
| JP2014-083024 | 2014-04-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104972843A CN104972843A (en) | 2015-10-14 |
| CN104972843B true CN104972843B (en) | 2018-06-05 |
Family
ID=54270032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510165804.1A Active CN104972843B (en) | 2014-04-14 | 2015-04-09 | Pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6006742B2 (en) |
| CN (1) | CN104972843B (en) |
Families Citing this family (4)
| 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 |
| JP6645123B2 (en) * | 2015-10-29 | 2020-02-12 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6880771B2 (en) | 2017-01-25 | 2021-06-02 | 住友ゴム工業株式会社 | tire |
| JP6361762B1 (en) * | 2017-03-06 | 2018-07-25 | 横浜ゴム株式会社 | Pneumatic tire |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02189206A (en) * | 1989-01-17 | 1990-07-25 | Sumitomo Rubber Ind Ltd | Tire capable of also running on soft land |
| DE19604727A1 (en) * | 1996-02-09 | 1997-08-14 | Continental Ag | Pneumatic vehicle tires |
| JP4230621B2 (en) * | 1999-08-12 | 2009-02-25 | 住友ゴム工業株式会社 | Pneumatic tire |
| KR100846166B1 (en) * | 2001-02-28 | 2008-07-14 | 피렐리 타이어 소시에떼 퍼 아찌오니 | Tyre for motor vehicles, with a wide tread, particularly for snow-covered ground |
| JP4738276B2 (en) * | 2006-08-03 | 2011-08-03 | 株式会社ブリヂストン | Pneumatic tire |
| CN201552983U (en) * | 2009-11-08 | 2010-08-18 | 青岛黄海橡胶股份有限公司 | Tread pattern of radial ply tire of saloon |
| WO2012043036A1 (en) * | 2010-09-30 | 2012-04-05 | 株式会社ブリヂストン | Pneumatic tire |
-
2014
- 2014-04-14 JP JP2014083024A patent/JP6006742B2/en active Active
-
2015
- 2015-04-09 CN CN201510165804.1A patent/CN104972843B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015202777A (en) | 2015-11-16 |
| CN104972843A (en) | 2015-10-14 |
| JP6006742B2 (en) | 2016-10-12 |
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