CN104275990B - Pneumatic tyre - Google Patents
Pneumatic tyre Download PDFInfo
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- CN104275990B CN104275990B CN201410145838.XA CN201410145838A CN104275990B CN 104275990 B CN104275990 B CN 104275990B CN 201410145838 A CN201410145838 A CN 201410145838A CN 104275990 B CN104275990 B CN 104275990B
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- tire
- shoulder
- groove
- cutter groove
- tyre
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/032—Patterns comprising isolated recesses
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- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The present invention provides a pneumatic tyre capable of suppressing reduction of drainage performance, improving operation stability and uneven wear resistant performance. The pneumatic tyre (1), at a tyre surface portion (2), has a pair of tyre shoulder main grooves (10) configured at an inner side of a tyre surface grounding end (Te) and extending continuously along a circumferential direction of the tyre, and a pair of tyre shoulder land portions (13) arranged at a tyre axial outer side of the tyre shoulder main grooves (10). The tyre shoulder land portions (13) are provided with: a plurality of tyre shoulder transverse grooves (31) extending towards the tyre axial inner side from the tyre surface grounding end (Te) and having inner ends (31i) forming ends in the tyre shoulder land portions (13); tyre shoulder auxiliary cut slots (34) communicated between the inner ends (31i) of the tyre shoulder transverse grooves (31) and the tyre shoulder main grooves (10); and tyre shoulder thin grooves (33) which are not communicated with the tyre shoulder auxiliary cut slots (34) between the adjacent tyre shoulder auxiliary cut slots (34) in the circumferential direction of the tyre and extend along the circumferential direction of the tyre.
Description
Technical field
The present invention relates to suppress the reduction of control stability and drainage performance and improve resistance to uneven wear performance
Pneumatic tire.
Background technology
Positioned at the outermost tire-shoulder land portion of the tire axial of fetus face, ground pressure during turning is high, to operation stabilization
The impact that performance is brought is big.
Typically for tire-shoulder land portion by along tire it is circumferentially continuous for the tread contour that constitutes of the bar portion that extends, energy
Enough rigidity for fully guaranteeing tire-shoulder land portion, so as to obtain excellent control stability.However, being made up of such bar portion
Tire-shoulder land portion, on wet road surface, the discharge road of the water being clipped between tire-shoulder land portion and road surface is not enough, therefore there is draining
The problem that performance is reduced.
Therefore, to tire-shoulder land portion is divided into multiple pattern blocks by arranging a plurality of tire-shoulder transverse groove in tire-shoulder land portion
Decorative pattern to improve drainage performance carries out various researchs.Even if however, such tire-shoulder land portion can also make the firm of tire circumference
Property reduce and cause the variation of control stability, and be easily referred to as the uneven wear of so-called heel toe abrasion.
There is following pneumatic tire disclosed in following patent documentations 1, i.e.,：The many of terminal are formed by tire-shoulder land portion
Tire-shoulder land portion is divided into mutual multiple block portions continuous in the circumferential in local by bar tire-shoulder transverse groove (band ditch), so as to press down
The generation of control stability variation processed and uneven wear.
Patent documentation 1：Japanese Unexamined Patent Publication 2009-292252 publications
However, in the pneumatic tire disclosed in above-mentioned patent documentation 1, as tire-shoulder transverse groove is formed in tire-shoulder land portion
Terminal, therefore cannot fully guarantee sometimes the drainage performance of the inner side in tire-shoulder land portion.Further, since tire-shoulder land portion without
Method obtains expected stiffness distribution, therefore, it is difficult to realizing the further raising of control stability, resistance to uneven wear performance.
The content of the invention
The present invention be in view of practical situation as above and propose, it is therefore intended that provide and a kind of suppress drainage performance drop
Pneumatic tire that is low and improving control stability and resistance to uneven wear performance.
The present invention is a kind of pneumatic tire, is had in fetus face：It is configured in the inner side of tyre surface earth terminal and along tire circumference
A pair of the shoulder main grooves for continuously extending and a pair of tire-shoulder land portions on the outside of the tire axial of the shoulder main groove, institute
State it is airtyred be characterised by, be provided with the tire-shoulder land portion：A plurality of tire-shoulder transverse groove, they are from the tyre surface earth terminal
Extend towards on the inside of tire axial and with terminal is not connected and formed in the tire-shoulder land portion with the shoulder main groove
It is inner；Multiple tire shoulders aid in cutter groove, and they are connected between the shoulder main groove in the described inner of each tire-shoulder transverse groove；With
And tire shoulder longitudinal direction rill, which is in tire circumference not aiding in cutter groove with the tire shoulder between adjacent tire shoulder auxiliary cutter groove
The mode of connection is circumferentially extending along tire.
The pneumatic tire involved in the present invention is preferably：The tire-shoulder transverse groove at the tyre surface earth terminal relative to
The circumferential angle, θ 1 of tire is 85 °～90 °, and is less than the angle relative to the circumferential angle, θ 2 of tire at the inner place
θ1。
The pneumatic tire involved in the present invention is preferably：It is in the tire-shoulder land portion, adjacent in tire circumference
It is provided with the horizontal cutter groove of tire shoulder between the tire-shoulder transverse groove, the horizontal cutter groove of the tire shoulder is not intersected with the tire-shoulder transverse groove and from described
Tyre surface earth terminal extends towards on the inside of tire axial, the horizontal cutter groove of the tire shoulder have do not connect with tire shoulder longitudinal direction rill and
Form the inner of terminal in tire-shoulder land portion, the horizontal cutter groove of the tire shoulder is circumferential relative to tire at the tyre surface earth terminal
Angle, θ 3 is 85 °～90 °, and is less than the angle, θ 3 relative to the circumferential angle, θ 4 of tire at the inner place.
The pneumatic tire involved in the present invention is preferably：Tire shoulder longitudinal direction rill between the tire-shoulder transverse groove
The ratio L1/D of the interval D of the tire circumferential lengths L1 tire-shoulder transverse groove adjacent with tire circumference is 0.3～0.6.
The pneumatic tire involved in the present invention is preferably：Length L3 of the tire axial of tire shoulder auxiliary cutter groove with
The ratio L3/L2 of length L2 of the tire axial of the tire-shoulder transverse groove is 0.4～0.6..
The pneumatic tire involved in the present invention is preferably：The angle, θ 2 of the tire-shoulder transverse groove is 75 °～85 °.
The pneumatic tire involved in the present invention is preferably：It is provided with the fetus face：It is configured in tire equator
On the outside of two and described in a pair between shoulder main groove and along circumferentially continuous ground a pair of the central main grooves extending and described of tire
The a pair middle land portions marked off between central main groove and the shoulder main groove, are formed with each middle land portion：It is many
Bar intermediate, inclined ditch, they with extend on the inside of from the shoulder main groove towards tire axial and do not connect with the central main groove and
Form the inner of terminal；A plurality of intermediate, inclined cutter groove, their tire axial it is inner connect with the central main groove and with institute
State intermediate, inclined ditch to extend parallel to；And middle longitudinal direction rill, its adjacent intermediate, inclined cutter groove in tire circumference
Between it is circumferentially extending along tire in the way of not connecting with the intermediate, inclined cutter groove.
The pneumatic tire involved in the present invention is preferably：The intermediate, inclined ditch is arranged across the shoulder main groove
The opposed position of cutter groove is being aided in the tire shoulder.
The pneumatic tire involved in the present invention is preferably：Rill adjacent institute in tire circumference in longitudinal direction in the middle of described
Stating circumferentially arranged between intermediate, inclined cutter groove has a plurality of.
The pneumatic tire involved in the present invention is preferably：The intermediate, inclined cutter groove includes the first intermediate, inclined knife
Groove, the outer end of the tire axial of the first intermediate, inclined cutter groove are connected with described the inner of the intermediate, inclined ditch.
The pneumatic tire involved in the present invention is preferably：The first intermediate, inclined cutter groove is every a centre
Oblique groove and interval setting.
The pneumatic tire involved in the present invention is preferably：The intermediate, inclined cutter groove includes the second intermediate, inclined knife
Groove, the outer end of the tire axial of the second intermediate, inclined cutter groove are connected with the shoulder main groove.
The pneumatic tire of the present invention, is provided between adjacent tire shoulder auxiliary cutter groove in tire circumference and circumferentially prolongs along tire
The tire shoulder longitudinal direction rill stretched, therefore, it is possible to improve the drainage performance of the inner side in tire-shoulder land portion.Tire shoulder longitudinal direction rill not with tire shoulder
The connection of auxiliary cutter groove is simultaneously circumferentially extending along tire, therefore rationalizes the stiffness distribution in tire-shoulder land portion, it is possible to increase manipulate steady
Qualitative energy, and the uneven wear in tire-shoulder land portion can be suppressed.
Description of the drawings
Fig. 1 is the sectional view of the airtyred embodiment for illustrating the present invention.
Fig. 2 is the expanded view of the fetus face of Fig. 1.
Fig. 3 is the line A-A sectional view of Fig. 2.
Fig. 4 is the expanded map in the central land portion of Fig. 2.
Fig. 5 is the expanded map in the middle land portion of Fig. 2.
Fig. 6 is the expanded map in the tire-shoulder land portion of Fig. 2.
Fig. 7 is the relation of the expanded view with ground connection shape of the fetus face of Fig. 2.
Fig. 8 is the expanded view of the variation of fetus face.
Description of reference numerals：1 ... pneumatic tire；2 ... fetus faces；9 ... central main grooves；10 ... shoulder main grooves；12 ... is middle
Land portion；13 ... tire-shoulder land portions；25 ... intermediate, inclined ditches；25a ... intermediate, inclined ditches；25i ... is inner；26 ... intermediate, inclined knives
Groove (the second intermediate, inclined cutter groove)；26a ... wide width parts；26b ... intermediate, inclined cutter grooves (the first intermediate, inclined cutter groove)；27 ... is middle
Longitudinal rill；31 ... tire-shoulder transverse grooves；31i ... is inner；The horizontal cutter groove of 32 ... tire shoulders；32i ... is inner；33 ... tire shoulders longitudinal direction rill；
34 ... tire shoulders aid in cutter groove.
Specific embodiment
Hereinafter, an embodiment of the invention is illustrated based on accompanying drawing.
Fig. 1 is that the tyre equatorial including the tire rotary shaft under normal state of the pneumatic tire 1 of present embodiment is cutd open
View.Herein, normal state is referred to be assembled in regular wheel rim (not shown) and be filled with regular intrinsic pressure nothing tyre rim and is born
The state of load.Hereinafter, in case of no particular description, size of tire each several part etc. is measured under the normal state
Value.
" regular wheel rim " refers to that the specification is according to each tire institute in the schematism of the specification comprising tire institute foundation
It is determined that wheel rim, for example, if JATMA, be then " standard rim ", if TRA, be then " Design Rim ", if ETRTO,
It is then " Measuring Rim ".
" regular intrinsic pressure " refers to：In the schematism of the specification comprising tire institute foundation, each specification is according to each tire
Determined by air pressure, for example, if JATMA, be then " highest air pressure ", if TRA, be then table " TIRE LOAD
Maximum described in LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO, then for
“INFLATION PRESSURES”。
As shown in figure 1, the pneumatic tire (hereinafter sometimes referred to simply as " tire ") 1 of present embodiment has：From fetus face 2
The carcass 6 of the bead core 5 of bead part 4 is reached through sidewall 3, and the tire radial outside of the carcass 6 is configured in and in tire
The belt 7 of the inner side of face 2, illustrates the tire of car in present embodiment.
Carcass 6 is for example made up of 1 piece of carcass ply 6A.Carcass ply 6A is across the main part between bead core 5,5
The two ends of 6A have a series of return portions 6b, and return portion 6b is by turning back from tire axial inside facing outward side around bead core 5
And it is limited to bead core 5.Carcass ply 6A is for example with organic fiber cords such as aromatic polyamide, staple fibres as tire
Body cord.Body cord is for example arranged with 70 °～90 ° of angle relative to tire equator C.Main part 6a and return portion 6b it
Between be configured with from bead core 5 towards tire radial outside in tapered extend bead apex 8.
In the present embodiment, belt 7 is formed as follows：By belt cord relative to tire equator C for example with
Two pieces of belt plies 7A, 7B of 15 °～45 ° of angle oblique arrangement, in tire footpath on the cross one another direction of belt cord
Overlap upwards.The belt cord for example suitably adopts aramid fiber or staple fibre etc..
Fig. 2 is the expanded view of the fetus face 2 of the pneumatic tire 1 of present embodiment.As shown in Fig. 2 present embodiment is filled
Air filled tyre 1 is formed with its fetus face 2：It is configured in the both sides of tire equator C and along the circumferentially continuous centering that extends of ground of tire
Centre tap drain 9, and on the outside of the tire axial of the central main groove 9 along circumferentially continuous a pair of the shoulder main grooves 10 that extend of ground of tire.One
The inner side of tyre surface earth terminal Te is configured in shoulder main groove 10, a pair of central main grooves 9 are configured between a pair of shoulder main grooves 10.This
The central main groove 9 and shoulder main groove 10 of embodiment has the ditch width of constant and linearly to extend, but it is also possible to
Extended with zigzag or S shape.Central main groove 9 can also for example only have 1 and extend in tire equator C.
Tyre surface earth terminal Te refers to, applies regular load to the tire of normal state and is grounded on plane with 0 inclination angle of being outside one's consideration
When the axially outermost earth terminal of tire." regular load " is referred to, in the schematism of the specification comprising tire institute foundation, should
Specification if JATMA, is then " maximum load ability ", if TRA, is then table " TIRE according to load determined by each tire
Maximum described in LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES ", if ETRTO, then for
“LOAD CAPACITY”。
The ditch width W2 of the ditch width W1 and shoulder main groove 10 of central main groove 9 is, for example, tyre surface ground width TW
3.0%～5.0%.When wet road travels, such shoulder main groove 10 and central main groove 9 can by road surface and fetus face 2 it
Between the water that produces be effectively discharged out, so as to improve wet road performance.In addition, tyre surface ground width TW is the tire 1 of normal state
The distance of the tire axial between tyre surface earth terminal Te, Te.
The line A-A sectional view of Fig. 2 is shown in Fig. 3.As shown in figure 3, trench depth d1 of central main groove 9 and shoulder main groove 10
And d2 is for example preferably 5mm～10mm.
Fetus face 2 is divided into into multiple regions by central main groove 9 and shoulder main groove 10.Fetus face 2 has：It is clipped in a pair
Central land portion 11, a pair middle land portions clipped by central main groove 9 and shoulder main groove 10 between central main groove 9,9
12nd, a pair of tire-shoulder land portions 13 and on the outside of the tire axial of shoulder main groove 10.
The enlarged drawing in central land portion 11 is shown in Fig. 4.Central land portion 11 is provided with a plurality of central oblique groove 21.In
The central main groove 9,9 of both sides is connected by centre oblique groove 21.Thus central land portion 11 is that the arrangement of multiple center running lugs 22 is formed
Pattern block row.Central oblique groove 21 obliquely extends relative to tire axial, therefore the center running lug 22 of present embodiment
Tread 22S be approximate parallelogram shape.
The Breadth Maximum W3 of the tire axial in central land portion 11 is preferably 0.08 times～the 0.12 of tyre surface ground width TW
Times.
Central oblique groove 21 is extended with the ditch width of constant.It is main that the ditch width W4 of central oblique groove 21 is preferably central authorities
More than 0.44 times of ditch width W1 (shown in Fig. 2) of ditch 9, more preferably more than 0.46 times, and preferably less than 0.52 times, more
Preferably less than 0.50 times.In the feelings of the ditch width W4 less than 0.44 times of ditch width W1 of central main groove 9 of central oblique groove 21
Under condition, it is possible to wet road performance will not be improved.Conversely, being more than the furrow width of central main groove 9 in the ditch width W4 of central oblique groove 21
In the case of 0.52 times of degree W1, it is possible to make the rigidity reduction in central land portion 11, so as to reduce control stability.
From the same viewpoint, as shown in figure 3, trench depth d3 of central oblique groove 21 is preferably the ditch of central main groove 9
More than 0.68 times of depth d1, more preferably more than 0.70 times, and preferably less than 0.76 times, more preferably 0.74 times with
Under.
It is preferred that being provided with the lacing wire 23 that ditch bottom 21d heaves in central oblique groove 21.Such lacing wire 23 is able to maintain that wet
Road performance and improve the rigidity in central land portion 6.
The enlarged drawing in middle land portion 12 is shown in Fig. 5.As shown in figure 5, middle land portion 12 has the wheel of constant
Tire axial width W5.In order to play excellent abrasion resistance properties and control stability, the width W5 in middle land portion 12 is excellent
Elect tyre surface ground width TW (shown in Fig. 1, below equally) as 0.12 times～0.18 times.
It is provided with middle land portion 12：A plurality of intermediate, inclined ditch 25, a plurality of intermediate, inclined cutter groove (the second intermediate, inclined knife
Groove) 26 and it is a plurality of in the middle of longitudinal direction rill 27.Intermediate, inclined ditch 25 towards with 21 identical direction of central oblique groove incline.It is middle
Oblique groove 25 from shoulder main groove 10 towards tire axial on the inside of extend and formed with not connecting with central main groove 9 the inner of terminal
25i.Therefore, middle land portion 12 has higher rigidity in the tire axial inboard portion that effect has larger ground pressure,
Therefore, it is difficult to produce wearing and tearing and with excellent wet road performance.
Intermediate, inclined ditch 25 is configured in opposed with following tire shoulders auxiliary cutter groove 34 (with reference to Fig. 2) across shoulder main groove 10
Position.Intermediate, inclined ditch 25 respectively arranges one relative to two adjacent tire shoulder auxiliary cutter grooves 34.Such intermediate, inclined ditch
25 can improve wet road performance.
The ditch width W6 of intermediate, inclined ditch 25 be preferably 0.50 times of the ditch width W2 (with reference to Fig. 2) of shoulder main groove 10 with
On, more preferably more than 0.55 times, and preferably less than 0.65 times, more preferably less than 0.60 times.Such intermediate, inclined
Ditch 25 is able to maintain that the rigidity in middle land portion 12, and does not damage control stability and improve wet road performance.
From the same viewpoint, tire axial length L0 of intermediate, inclined ditch 25 is preferably the tire in middle land portion 12
More than 0.40 times of axial width W5, more preferably more than 0.45 times, and preferably less than 0.60 times, more preferably 0.55 times
Below.
Intermediate, inclined ditch 25 is preferably more than 35 ° relative to the angle φ 1 of tire axial, more preferably more than 40 °, and
Preferably less than 55 °, more preferably less than 50 °.35 ° are less than relative to the angle φ 1 of tire axial in intermediate, inclined ditch 25
In the case of, the tire rigid circumference in middle land portion 12 can be reduced, it is possible to make abrasion resistance properties and control stability drop
It is low.Conversely, in the case where the angle φ 1 is more than 55 °, it is possible to reduce lateral stiffness.
In the present embodiment, the furrow rim 25e of at least one party of intermediate, inclined ditch 25 is at the outer end 25o of tire axial
Direction towards the increase of ditch width is for example with arc-shaped bend.Thus, intermediate, inclined ditch 25 can play higher drainage.
As shown in figure 3, trench depth d4 of intermediate, inclined ditch 25 be preferably 0.50 times of trench depth d1 of central main groove 9 with
On, more preferably more than 0.55 times, and preferably less than 0.70 times, more preferably less than 0.67 times.Such intermediate, inclined
Ditch 25 is able to maintain that control stability and abrasion resistance properties and improves wet road performance.
Intermediate, inclined ditch 25 has the lacing wire 28 that ditch bottom 25d heaves in the outer end 25o sides of tire axial (with reference to Fig. 3).
Such intermediate, inclined ditch 25 is prevented from the rigidity on the outside of the tire axial in middle land portion 12 excessively to be reduced and suppresses middle
The uneven wear in land portion 12.
Tire axial the inner of intermediate, inclined cutter groove 26 is connected with central main groove 9 and is abreast prolonged with intermediate, inclined ditch 25
Stretch, the tire axial outer end of intermediate, inclined cutter groove 26 is connected with shoulder main groove 10.Thus, middle land portion 12 is divided into multiple
Middle pattern block 29.Compared with the land portion for being provided with band ditch that patent documentation 1 is recorded, such middle land portion 12 is in wheel
There is higher rigidity, so as to play excellent abrasion resistance properties in tire circumference.
The width Ws of intermediate, inclined cutter groove 26 is less than 2.0mm, arranges in the inner of tire axial of intermediate, inclined cutter groove 26
There is wide width part 26a.
Wide width part 26a is arranged on the inner side of the tire axial of intermediate, inclined cutter groove 26.The ditch width of wide width part 26a is
More than 2.0mm, and gradually increase towards the inner side of tire axial.Wide width part 26a is connected with central main groove 9.By such wide cut
Portion 26a can improve the drainage performance of intermediate, inclined cutter groove 26, and suppress 29 defect of middle pattern block.Therefore improve resistance to inequality
Even polishing machine and wet road performance.
Intermediate, inclined cutter groove 26 is inclined relative to tire axial.In order to improve abrasion resistance properties and control stability,
Intermediate, inclined cutter groove 26 is preferably more than 35 ° relative to the angle φ 2 of tire axial, more preferably more than 40 °, and is preferably
Less than 55 °, more preferably less than 45 °.By such intermediate, inclined cutter groove 26, the middle pattern block 29 of present embodiment is stepped on
Face 29s is formed as approximate parallelogram shape.Replace such intermediate, inclined cutter groove 26 or in addition to intermediate, inclined cutter groove 26,
The intermediate, inclined cutter groove (that central main groove 9 is connected with the inner 25i of the tire axial of intermediate, inclined ditch 25 can also be provided with
One intermediate, inclined cutter groove).The tire axial outer end of such intermediate, inclined cutter groove is connected with the inner 25i of intermediate, inclined ditch 25,
The drainage performance in middle land portion 12 can be improved.
As shown in figure 3, trench depth d5 of intermediate, inclined cutter groove 26 be preferably 0.50 times of trench depth d1 of central main groove 9 with
On, more preferably more than 0.55 times, and preferably less than 0.70 times, more preferably less than 0.67 times.Such intermediate, inclined
Cutter groove 26 is able to maintain that the rigidity in middle land portion 12 and improves wet road performance.
As shown in figure 5, between the adjacent intermediate, inclined cutter groove 26 in tire circumference of middle longitudinal direction rill 27 and than in
Between oblique groove 25 inner 25i rollers tire axially inner side, it is circumferentially disconnected along tire in the way of not connecting with intermediate, inclined cutter groove 26
Extend continuously.Two ends 27e, 27e of middle longitudinal direction rill 27 is not connected with intermediate, inclined cutter groove 26 and in middle pattern block 29
Interior formation terminal.It is such in the middle of longitudinal direction rill 27 make on the inside of the tire axial of middle pattern block 29 and outside rigid uniform
Be close to, suppress uneven wear and to improve drainage performance.
In the present embodiment, middle longitudinal direction rill 27 is each provided with the tire circumference both sides of intermediate, inclined ditch 25 respectively
1.That is, it is circumferentially arranged between the adjacent intermediate, inclined cutter groove 26 in tire circumference of middle longitudinal direction rill 27 to have a plurality of.If
In the middle of between the circumferentially upper adjacent intermediate, inclined cutter groove 26 of tire, the bar number of longitudinal direction rill 27 can also be more than 3.It is logical
Cross and the bar number of middle longitudinal direction rill 27 is suitably changed, can adjust firm on the inside of the tire axial of middle pattern block 29
Property.In the middle of such, longitudinal direction rill 27 can further improve above-mentioned effect, enable in particular to suppress heel toe abrasion.
Middle longitudinal direction rill 27 has the ditch width of constant and along tire circumferentially linearly to extend.Middle longitudinal direction is thin
The ditch width W7 of ditch 27 is preferably more than 0.8mm, more preferably more than 1.0mm, and preferably below 1.6mm, more preferably
1.4mm it is following.In the middle of such, longitudinal direction rill 27 does not damage control stability and plays excellent wet road performance.
From the same viewpoint, as shown in figure 3, trench depth d6 of middle longitudinal direction rill 27 is preferably central main groove 9
More than 0.45 times of trench depth d1, more preferably more than 0.48 times, and preferably less than 0.55 times, more preferably 0.52 times with
Under.
Trench depth d4, the trench depth of intermediate, inclined cutter groove 26 of the stiffness distribution in middle land portion 12 by intermediate, inclined ditch 25
The impact of trench depth d6 of d5 and middle longitudinal direction rill 27.It is minimum situation in trench depth d5 of intermediate, inclined cutter groove 26
Under, the rigid phase that the tire in middle land portion 12 is circumferential becomes big relatively for the rigidity of tire axial.In addition, in being configured at
Between longitudinal rill 27 tire axial on the outside of intermediate, inclined ditch 25 trench depth d4 for maximum in the case of, middle land portion 12
Rigidity be gradually reduced towards on the outside of tire axial.Thus, middle land portion 12 is with the stiffness distribution corresponding to ground pressure, because
This can play excellent abrasion resistance properties and control stability.
Fig. 6 illustrates the enlarged drawing in tire-shoulder land portion 13.As shown in fig. 6, tire-shoulder land portion 13 has the tire of constant
The width W8 of axial direction.In order to take into account cornering stiffnesses energy and ride comfort energy, the width W8 in tire-shoulder land portion 13 is preferably
0.20 times of tyre surface ground width TW～0.26 times.Such tire-shoulder land portion 13 plays excellent abrasion resistance properties and manipulation
Stability.
Tire-shoulder land portion 13 is provided with horizontal cutter groove 32, the tire shoulder longitudinal direction rill 33 of tire-shoulder transverse groove 31, tire shoulder and tire shoulder
Auxiliary cutter groove 34.
Tire-shoulder transverse groove 31 extends towards on the inside of tire axial from the outside of tyre surface earth terminal Te and with tire-shoulder land portion
The inner 31i of terminal is formed in 13.Thus wet road performance and nibbling energy are improved.
The ditch width W9 of tire-shoulder transverse groove 31 is preferably more than 0.62 times of the ditch width W2 of shoulder main groove 10, more preferably
More than 0.64 times, and preferably less than 0.70 times, more preferably less than 0.68 times.Such tire-shoulder transverse groove 31 is able to maintain that tire
The rigidity in shoulder land portion 13 simultaneously plays excellent abrasion resistance properties, and improve wet road performance and nibbling energy.
It is preferred that the tire shoulder for extending along tire axial and connecting with shoulder main groove 10 is provided with the inner 31i of tire-shoulder transverse groove 31
Auxiliary cutter groove 34.Such tire shoulder auxiliary cutter groove 34 is able to maintain that the rigidity on the inside of the tire axial in tire-shoulder land portion 13 and carries
The drainage performance in high tire-shoulder land portion 13.Therefore, it is possible to play excellent abrasion resistance properties and wet road performance.
Length L3 of the tire axial of tire shoulder auxiliary cutter groove 34 and the ratio L3/ of length L2 of the tire axial of tire-shoulder transverse groove 31
L2 is preferably 0.4～0.6.In the case where the ratio of L3/L2 is less than 0.4, easily occur near the inner 31i of tire-shoulder transverse groove 31
The uneven wears such as heel toe abrasion.In the case where the ratio of L3/L2 is more than 0.6, it is possible to cannot fully improve drainage performance.
The horizontal cutter groove of tire shoulder 32 is arranged between the circumferentially upper adjacent tire-shoulder transverse groove 31,31 of tire.The horizontal cutter groove of tire shoulder 32
Do not intersect with tire-shoulder transverse groove 31, and substantially extend parallel to tire-shoulder transverse groove 31 from the outside of tyre surface earth terminal Te, and with
The inner 32i of terminal is formed in tire-shoulder land portion 13.The horizontal cutter groove of such tire shoulder 32 makes the stiffness distribution in tire-shoulder land portion 13
Uniformly so as to suppress uneven wear, and improve wet road performance and sail partially performance.
Tire shoulder longitudinal direction rill 33 is in the inner 32i rollers than the horizontal cutter groove of the inner 31i and tire shoulder of tire-shoulder transverse groove 31 32
The position of tire axially inner side circumferentially intermittently extends along tire.Tire shoulder longitudinal direction rill 33 two ends 33e, 33e not with tire-shoulder transverse groove
31st, tire shoulder auxiliary cutter groove 34 and the horizontal cutter groove of tire shoulder 32 are connected, and in tire-shoulder land portion 13 form terminal.That is, tire shoulder is indulged
To rill 33 in 10 institute of inner 32i and shoulder main groove by adjacent tire shoulder auxiliary cutter groove 34,34 and the horizontal cutter groove of tire shoulder 32
The region of encirclement is provided with one or more.Such tire shoulder longitudinal direction rill 33 makes the rigidity of the tire axial in tire-shoulder land portion 13
It is evenly distributed, so as to suppress uneven wear.
The ditch width W10 of tire shoulder longitudinal direction rill 33 is preferably more than 0.8mm, more preferably more than 1.0mm, and is preferably
Below 1.6mm, more preferably below 1.4mm.The ditch width W10 of tire shoulder longitudinal direction rill 33 is preferably greater than the horizontal cutter groove of tire shoulder 32
And tire shoulder aids in the width of cutter groove 34.Such tire shoulder longitudinal direction rill 33 does not damage control stability and plays excellent wet
Road performance.
It is arranged in tire circumferential lengths L1 and tire circumference of the tire shoulder longitudinal direction rill 33 between the tire-shoulder transverse groove 31,31
The ratio L1/D of the interval D of adjacent tire-shoulder transverse groove 31,31 is preferably 0.3～0.6.In the case where the ratio of L1/D is less than 0.3, have
The drainage performance tire axial in tire-shoulder land portion 13 on the inside of possibly cannot be improved.On the other hand.It is more than 0.6 in the ratio of L1/D
In the case of, it is impossible to rationalize the stiffness distribution in tire-shoulder land portion 13, it is therefore possible to control stability and tire cannot be improved
The resistance to uneven wear performance in shoulder land portion 13.
Fig. 7 represents the ground connection shape of the pneumatic tire 1 involved by present embodiment with hacures.In the figure 7, tire
Direction of advance is indicated by the arrow P.As shown in Figure 6, Figure 7, the tire-shoulder transverse groove 31 at tyre surface earth terminal Te is relative to tire circumference
Angle, θ 1 is preferably 85 °～90 °.Such tire-shoulder transverse groove 31 is stepped on relative to the tire-shoulder land portion 13 of ground connection shape FP of tire
Enter side edge FE1 and leave side edge FE2 and intersected with angle [alpha].Therefore, the tire shoulder block portion 35 for being marked off by tire-shoulder transverse groove 31
Tread 35s start ground connection at first in the inner 31i that side of entering into is tire-shoulder transverse groove 31, tyre surface earth terminal Te is finally grounded.Thus,
Gradually it is grounded to tyre surface earth terminal Te from the inner 31i of tire-shoulder transverse groove 31, therefore the locality of the side edge FE1 that enters into is slided and subtracted
It is few, so as to suppress the uneven wears such as toe abrasion of calling in person.On the other hand, side, the tyre surface of the tread 35s of tire shoulder block portion 35 are being left
Earth terminal Te initially moves off road surface at first, and the inner 31i of tire-shoulder transverse groove 31 finally leaves road surface.Thus, from tyre surface earth terminal
Te to the inner 31i of tire-shoulder transverse groove 31 gradually leaves road surface, thus leave side edge FE2 near locality slide and reduce,
So as to suppress the uneven wears such as toe abrasion of calling in person.
As shown in fig. 6, tire-shoulder transverse groove 31 is preferably ratio relative to the circumferential angle, θ 2 of tire at inner 31i connecing in tyre surface
Angle, θ 1 at ground terminal Te is little.Drainage performance can be improved using such tire-shoulder transverse groove 31.More specifically, tire-shoulder transverse groove 31
Inner 31i at angle, θ 2 be preferably 75 °～85 °.In the case where angle, θ 2 is less than 75 °, easily in tire-shoulder transverse groove 31
The uneven wears such as heel toe abrasion are produced near inner 31i, in the case where angle, θ 2 is more than 85 °, it is possible to cannot be fully
Improve drainage performance.
As shown in fig. 6, the horizontal cutter groove 32 of tire shoulder at tyre surface earth terminal Te is preferably relative to the circumferential angle, θ 3 of tire
85 °～90 °.The horizontal cutter groove 32 of such tire shoulder is identical with the tire-shoulder transverse groove 31 shown in Fig. 7, relative to ground connection shape FP of tire
Tire-shoulder land portion 13 enter into side edge FE1 and leave side edge FE2 with angle [alpha] identical angular cross.Therefore from
The inner 32i of the horizontal cutter groove of tire shoulder 32 is gradually grounded to tyre surface earth terminal Te, and the locality at the side edge FE1 that enters into is slided and subtracted
It is few, so as to suppress the uneven wears such as toe abrasion of calling in person.On the other hand, it is also horizontal to tire shoulder from tyre surface earth terminal Te side is left
The inner 32i of cutter groove 32 gradually leaves road surface, leave side edge FE2 near locality slide reduce, so as to suppress call in person toe
The uneven wears such as abrasion.
As shown in fig. 6, the horizontal cutter groove 32 of tire shoulder is preferably relative to the circumferential angle, θ 4 of tire at inner 32i compares tyre surface
Angle, θ 3 at earth terminal Te is little.Drainage performance can be improved by the horizontal cutter groove of such tire shoulder 32.
Tire shoulder aid in cutter groove 34 relative to the circumferential angle, θ 5 of tire than tire-shoulder transverse groove 31 at inner 31i relative to tire
Circumferential angle, θ 2 is little.Such tire shoulder auxiliary cutter groove 34 can improve the drainage performance in tire-shoulder land portion 13.
According to the pneumatic tire 1 with present embodiment as constructed as above, adjacent tire shoulder auxiliary knife in tire circumference
It is provided between groove 34,34 along the circumferentially extending tire shoulder longitudinal direction rill 33 of tire, therefore, it is possible to improve the wheel in tire-shoulder land portion 13
The drainage performance of tire axially inner side.Tire shoulder longitudinal direction rill 33 is not connected and circumferentially extending along tire with tire shoulder auxiliary cutter groove 34, because
This rationalizes can the stiffness distribution in tire-shoulder land portion 13, so as to improve control stability, and can suppress tire shoulder land
The uneven wear in ground portion 13.
Fig. 8 illustrates the fetus face 2A involved by the other embodiment of the present invention.As shown in figure 8, the embodiment and Fig. 2
The difference of the fetus face 2 Deng shown in is：Intermediate, inclined is provided between adjacent intermediate, inclined ditch 25 in tire circumference
Ditch 25a.For fetus face 2A, intermediate, inclined ditch 25 or intermediate, inclined ditch 25a are relative to a tire shoulder auxiliary cutter groove
34 are each provided with 1.Additionally, from the inner wide width part 26a of the tire axial for omitting intermediate, inclined cutter groove 26 (with reference to Fig. 5) this
In put from the point of view of, it is also different from the fetus face 2 shown in Fig. 2 etc..Intermediate, inclined ditch 25a is same with intermediate, inclined ditch 25, from tire shoulder master
Ditch 10 extends towards on the inside of tire axial, and the inner of terminal is formed with not connecting with central main groove 9.
In fetus face 2A, intermediate, inclined cutter groove (the first intermediate, inclined cutter groove) 26b is with the outer end of its tire axial and centre
The mode of the inner connection of oblique groove 25a is connected with intermediate, inclined ditch 25a.Thus, intermediate, inclined cutter groove 26b is every a centre
Oblique groove 25,25a and interval setting.
According to the pneumatic tire 1 with such fetus face 2A, using setting up relative to the tyre surface 2 shown in Fig. 2 etc.
Intermediate, inclined ditch 25a, it is possible to increase the drainage performance in middle land portion 12, so even eliminating wide width part 26a, it is also possible to tie up
Hold the drainage performance more than equal with the pneumatic tire 1 with fetus face 2.
More than, the pneumatic tire of the present invention is explained, but the present invention is not limited to above-mentioned concrete reality
Mode is applied, but various modes can be changed to implement.
Embodiment
The pneumatic tire of the size for 195/65R15 of the motif with Fig. 2 has been manufactured experimently based on table 1 to the specification of table 4,
And be installed on 15 × 6J of wheel rim, and it is intrinsic pressure for 230kPa under conditions of be installed on the full wheel of the car that capacity is 1800cc,
And resistance to uneven wear performance, control stability and wet road braking ability are tested.Method of testing is as follows.
＜ resistance to uneven wear performance ＞
The abrasion of heel toe and the heel toe in tire-shoulder land portion after each confession tries tire running 8000km, to middle land portion
Abrasion is measured.As a result be comparative example 1 be 100 index, numerical value it is bigger represent resistance to uneven wear performance it is more excellent.
＜ control stabilities ＞
Travelled on the test route of dried asphalt road using above-mentioned vehicle by a driver, and according to driver's
Sense organ pair is to steering wheel response when turning, rigidly the related characteristic such as sense and earth-grasping force is evaluated.As a result it is ratio
Compared with the index that example 1 is 100, numerical value is bigger to represent that control stability is more excellent.
＜ drainage performance ＞
Wet road bituminous paving of the moisture film as 5mm is entered with the speed of 80km/h using vehicle, and is measured until making completely
Braking distance till dynamic.As a result be comparative example 1 be 100 index, numerical value it is bigger represent drainage performance it is more excellent.
Table 1
Table 2
Table 3
Table 4
Clearly can confirm from table 1 to table 4, compared with the tire of comparative example, the pneumatic tire of embodiment is valuably carried
High resistance to uneven wear performance, control stability and drainage performance.
Claims (11)
1. a kind of pneumatic tire, has in fetus face：Be configured in tyre surface earth terminal inner side and along tire it is circumferentially continuous extend
A pair of shoulder main grooves and a pair of tire-shoulder land portions on the outside of the tire axial of the shoulder main groove, the pneumatic tire
It is characterised by,
It is provided with the tire-shoulder land portion：
A plurality of tire-shoulder transverse groove, they extend towards on the inside of tire axial from the tyre surface earth terminal and have not with the tire shoulder master
Ditch connects and the inner of terminal is formed in the tire-shoulder land portion；
Multiple tire shoulders aid in cutter groove, and they are connected between the shoulder main groove in the described inner of each tire-shoulder transverse groove；With
And
Cutter groove is not aided in the tire shoulder between tire shoulder longitudinal direction rill, its adjacent tire shoulder auxiliary cutter groove in tire circumference
Connect and circumferentially extending along tire,
It is provided with the fetus face：It is configured on the outside of the two of tire equator and between shoulder main groove and edge wheel described in a pair
A pair of central main grooves that tire extends circumferentially continuously and mark off between the central main groove and the shoulder main groove a pair
Middle land portion,
It is formed with each middle land portion：
A plurality of intermediate, inclined ditch, they with extend on the inside of from the shoulder main groove towards tire axial and not with the central main groove
Connect and the inner of formation terminal；
A plurality of intermediate, inclined cutter groove, their tire axial it is inner connect with the central main groove and with the intermediate, inclined ditch
Extend parallel to；And
Middle longitudinal direction rill, between its adjacent intermediate, inclined cutter groove in tire circumference not with the intermediate, inclined cutter groove
Connect and circumferentially extending along tire.
2. pneumatic tire according to claim 1, it is characterised in that
The tire-shoulder transverse groove is 85 °～90 ° relative to the circumferential angle, θ 1 of tire at the tyre surface earth terminal, and described
Inner place is less than the angle, θ 1 relative to the circumferential angle, θ 2 of tire.
3. pneumatic tire according to claim 1 and 2, it is characterised in that
In the tire-shoulder land portion, the horizontal cutter groove of tire shoulder between the adjacent tire-shoulder transverse groove, is provided with tire circumference, should
The horizontal cutter groove of tire shoulder is not intersected and is extended towards on the inside of tire axial from the tyre surface earth terminal with the tire-shoulder transverse groove,
The horizontal cutter groove of the tire shoulder is had
End,
The horizontal cutter groove of the tire shoulder is 85 °～90 ° relative to the circumferential angle, θ 3 of tire at the tyre surface earth terminal, and
The inner place is less than the angle, θ 3 relative to the circumferential angle, θ 4 of tire.
4. pneumatic tire according to claim 1 and 2, it is characterised in that
Tire circumferential lengths L1 of the tire shoulder longitudinal direction rill between the tire-shoulder transverse groove are circumferential with tire it is adjacent described
The ratio L1/D of the interval D of tire-shoulder transverse groove is 0.3～0.6.
5. pneumatic tire according to claim 1 and 2, it is characterised in that
Length L3 of the tire axial of the tire shoulder auxiliary cutter groove and the ratio L3/ of length L2 of the tire axial of the tire-shoulder transverse groove
L2 is 0.4～0.6.
6. pneumatic tire according to claim 2, it is characterised in that
The angle, θ 2 of the tire-shoulder transverse groove is 75 °～85 °.
7. pneumatic tire according to claim 6, it is characterised in that
The intermediate, inclined ditch is arranged on across the shoulder main groove and aids in the opposed position of cutter groove with the tire shoulder.
8. the pneumatic tire according to claim 1 or 7, it is characterised in that
It is circumferentially arranged between the adjacent intermediate, inclined cutter groove in tire circumference of longitudinal direction rill in the middle of described to have a plurality of.
9. pneumatic tire according to claim 1, it is characterised in that
The intermediate, inclined cutter groove includes the first intermediate, inclined cutter groove, the outer end of the tire axial of the first intermediate, inclined cutter groove with
The described inner connection of the intermediate, inclined ditch.
10. pneumatic tire according to claim 9, it is characterised in that
The first intermediate, inclined cutter groove is every intermediate, inclined ditch interval setting.
11. pneumatic tires according to claim 9, it is characterised in that
The intermediate, inclined cutter groove includes the second intermediate, inclined cutter groove, the outer end of the tire axial of the second intermediate, inclined cutter groove with
The shoulder main groove connection.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-146879 | 2013-07-12 | ||
| JP2013146879A JP5841568B2 (en) | 2013-07-12 | 2013-07-12 | Pneumatic tire |
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| Publication Number | Publication Date |
|---|---|
| CN104275990A CN104275990A (en) | 2015-01-14 |
| CN104275990B true CN104275990B (en) | 2017-04-12 |
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| CN201410145838.XA Active CN104275990B (en) | 2013-07-12 | 2014-04-11 | Pneumatic tyre |
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| JP (1) | JP5841568B2 (en) |
| CN (1) | CN104275990B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6720551B2 (en) | 2016-01-21 | 2020-07-08 | 横浜ゴム株式会社 | Pneumatic tire |
| RU2704766C1 (en) * | 2016-02-26 | 2019-10-30 | Дзе Йокогама Раббер Ко., Лтд. | Pneumatic tire |
| JP6711169B2 (en) * | 2016-06-24 | 2020-06-17 | 住友ゴム工業株式会社 | tire |
| JP6848359B2 (en) * | 2016-11-08 | 2021-03-24 | 住友ゴム工業株式会社 | tire |
| JP6769280B2 (en) * | 2016-12-13 | 2020-10-14 | 住友ゴム工業株式会社 | tire |
| JP6838421B2 (en) * | 2017-02-16 | 2021-03-03 | 住友ゴム工業株式会社 | tire |
| EP3489038B1 (en) * | 2017-11-27 | 2020-04-15 | Sumitomo Rubber Industries Limited | Tyre |
| JP6980515B2 (en) * | 2017-12-26 | 2021-12-15 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| JP7205168B2 (en) * | 2018-11-01 | 2023-01-17 | 住友ゴム工業株式会社 | tire |
| JP7121695B2 (en) * | 2019-06-19 | 2022-08-18 | 株式会社ブリヂストン | tire |
| JP7314446B2 (en) | 2019-09-10 | 2023-07-26 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | pneumatic tire |
| JP7516753B2 (en) * | 2019-12-16 | 2024-07-17 | 住友ゴム工業株式会社 | tire |
| JP7375521B2 (en) * | 2019-12-19 | 2023-11-08 | 住友ゴム工業株式会社 | pneumatic tires |
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| JP4964560B2 (en) * | 2006-10-23 | 2012-07-04 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP5282479B2 (en) * | 2008-08-18 | 2013-09-04 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5258502B2 (en) * | 2008-10-21 | 2013-08-07 | 株式会社ブリヂストン | tire |
| JP4830005B2 (en) * | 2009-06-10 | 2011-12-07 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5560894B2 (en) * | 2010-05-17 | 2014-07-30 | 横浜ゴム株式会社 | Pneumatic tire |
| WO2012026546A1 (en) * | 2010-08-25 | 2012-03-01 | 株式会社ブリヂストン | Pneumatic tire |
| JP5250016B2 (en) * | 2010-11-12 | 2013-07-31 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP5266307B2 (en) * | 2010-12-27 | 2013-08-21 | 住友ゴム工業株式会社 | Pneumatic tire |
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| JP2015016839A (en) | 2015-01-29 |
| JP5841568B2 (en) | 2016-01-13 |
| CN104275990A (en) | 2015-01-14 |
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