CN103568735B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN103568735B CN103568735B CN201310343813.6A CN201310343813A CN103568735B CN 103568735 B CN103568735 B CN 103568735B CN 201310343813 A CN201310343813 A CN 201310343813A CN 103568735 B CN103568735 B CN 103568735B
- Authority
- CN
- China
- Prior art keywords
- tire
- central
- pattern block
- transverse
- groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
- B60C11/11—Tread patterns in which the raised area of the pattern consists only of isolated elements, e.g. blocks
-
- 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0341—Circumferential grooves
-
- 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
- B60C2011/0337—Tread patterns characterised by particular design features of the pattern
- B60C2011/0339—Grooves
- B60C2011/0358—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane
- B60C2011/0365—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane characterised by width
Abstract
The present invention provides pneumatic tire, balancedly improves noiseproof feature, snow road performance and ice road performance.Pneumatic tire is provided with center running lug (5) and middle pattern block (6).Two kinds of pattern blocks are provided with multiple siping (14).Central transverse (4A) tilts with the angle of 5 °～20 °, and average groove width is the 7%～15% of the maximum length (L3) of center running lug.Middle transverse groove (4B) tilts with the angle of 5 °～25 °, and average groove width is the 7%～11% of the maximum length (L4) of middle pattern block (6).In ground plane under regular load load condition, the distance (La) that first intersection point (K1) is circumferential with the tire of the second intersection point (K2), it is the ground plane length (L5) at tire equator position (Ce) place and ground plane at 0.75～1.00 times of difference (L5 L6) of the length (L6) at centre position (6c) place of middle pattern block, first intersection point is intersected by central transverse with central main groove (3A) and obtains, and the second intersection point is intersected with central main groove by middle transverse groove and obtains.
Description
Technical field
The present invention relates to a kind of balancedly improve noiseproof feature, snow road performance and the filling of ice road performance
Air filled tyre.
Background technology
The pneumatic tire in winter not only travels on Xue Lu and ice road, also up at asphalt road etc.
Sail.Therefore, for the pneumatic tire in this winter, do not require nothing more than raising snow road performance, ice road
Performance, also requires to improve noiseproof feature.
Such as, in order to improve snow road performance, for the purpose of improving snow post shear strength, increase is proposed
The scheme of the volume of the traverse furrow of fetus face.But, in the method, due to the ground plane of fetus face
, therefore there is the ice road such problem of degradation in long-pending reduction.It addition, capacious at traverse furrow
In the case of there are the following problems: the air in traverse furrow flows out along with the rolling of tire, thus produces
Raw pumping sound etc. increase, and therefore cause noiseproof feature to be also deteriorated.So, at snow road performance and ice
There is reciprocal relationship between road performance and noiseproof feature, thus it is sexual to be difficult to balancedly improve above-mentioned institute
Energy.Technology related to this is had described in following patent document.
Patent document 1: Japanese Unexamined Patent Publication 2011-042282 publication
Summary of the invention
The present invention proposes in view of above-mentioned such actual state, and its main purpose is to provide
A kind of pneumatic tire, this pneumatic tire is provided with cutter groove flower at center running lug and middle pattern block
Line, it is stipulated that the furrow width of central transverse and middle transverse groove, arrange angle, and by first intersection point with
Tire circumferential distance between second intersection point specifies in certain scope, wherein, and above-mentioned first intersection point
Being intersected with central main groove by central transverse and form, above-mentioned second intersection point is by middle transverse groove and central main groove
Intersection forms, as substantially, it is possible to balancedly improve noiseproof feature, snow road performance and ice road
Performance.
The invention described in technical scheme 1 in the present invention is a kind of pneumatic tire, this pneumatic tire
By arranging at fetus face: in the tire axial both sides of tire equator along the circumferentially continuous extension of tire
A pair central main groove；Along the one of the circumferentially continuous extension of tire outside the tire axial of this central main groove
To shoulder main groove；The multiple central transverse extended between above-mentioned central main groove；And in above-mentioned
The multiple middle transverse groove extended between centre tap drain and above-mentioned shoulder main groove, thus make fetus face have:
Center running lug arranges, and this center running lug arranges to be drawn with above-mentioned central transverse by above-mentioned a pair central main groove
The center running lug separated arranges along tire circumferentially spaced and forms；And a pair middle pattern block row,
Middle pattern block is arranged by above-mentioned shoulder main groove, above-mentioned central main groove and above-mentioned middle transverse groove by this
The middle pattern block marked off arranges along tire circumferentially spaced and forms, and described airtyred feature exists
In, above-mentioned center running lug and above-mentioned middle pattern block are respectively arranged with multiple siping, above-mentioned
Central transverse relative to tire axial with the angle of 5 °～20 ° towards the lopsidedness of tire axial, and
The average groove width of above-mentioned central transverse is the maximum length of the tire circumference of above-mentioned center running lug
7%～15%, above-mentioned middle transverse groove relative to tire axial with the angle of 5 °～25 ° towards and above-mentioned central authorities
The lopsidedness that traverse furrow is contrary, and the average groove width of above-mentioned middle transverse groove is above-mentioned middle pattern block
Tire circumference on maximum length 7%～11%, wheel rim be assembled into regular wheel rim, fill just
Advise internal pressure, load regular load and load with the regular load of planar ground with the camber angle of 0 degree
In ground plane under state, the distance of the tire circumference of the first intersection point and the second intersection point, is above-mentioned connecing
The ground length in tire equator position and above-mentioned ground plane are at the tire of above-mentioned middle pattern block
0.75 times～1.00 times of the difference of the length of the tire circumference of axial middle position, wherein, on
Stating the first intersection point to be intersected with central main groove by above-mentioned central transverse and obtain, above-mentioned second intersection point is by above-mentioned
Middle transverse groove is intersected with central main groove and is obtained.
It addition, according to the pneumatic tire described in technical scheme 1, described in technical scheme 2
In invention, during the tire circumferential zones between above-mentioned first intersection point and above-mentioned second intersection point is formed
Centre protuberance or middle protrusion, wherein, above-mentioned central spud is by making the local of above-mentioned center running lug
Highlighting towards central main groove side and form, above-mentioned middle protrusion is by making the local court of above-mentioned middle pattern block
Central main groove side is prominent to be formed.
It addition, according to the pneumatic tire described in technical scheme 1 or 2, remembered in technical scheme 3
In the invention carried, the furrow width of above-mentioned central transverse gradually increases towards both ends from the central portion of tire axial
Add.
In the pneumatic tire of the present invention, it is provided with the tire axial in tire equator at fetus face
Both sides are along a pair central main groove of the circumferentially continuous extension of tire；Outside the tire axial of this central main groove
Side is along a pair shoulder main groove of the circumferentially continuous extension of tire；Extend many between above-mentioned central main groove
Individual central transverse；And between above-mentioned central main groove and above-mentioned shoulder main groove extend multiple centres
Traverse furrow.Thus fetus face has: center running lug arranges, and this center running lug arranges by an above-mentioned centering
The center running lug that centre tap drain and above-mentioned central transverse mark off arranges along tire circumferentially spaced and forms；
And a pair middle pattern block row, this middle pattern block is arranged by above-mentioned shoulder main groove, above-mentioned in
The middle pattern block that centre tap drain and above-mentioned middle transverse groove mark off is along the setting of tire circumferentially spaced
Become.
Center running lug and middle pattern block are respectively arranged with multiple siping.Pass through siping
Edge effect and improve ice road performance.
Central transverse relative to tire axial with the angle of 5 °～20 ° towards the lopsidedness of tire axial,
And the maximum length of the tire circumference that the average groove width of above-mentioned central transverse is center running lug
7%～15%.It addition, middle transverse groove is horizontal with central authorities with the angle court of 5 °～25 ° relative to tire axial
The lopsidedness that ditch is contrary, and the average groove width of above-mentioned middle transverse groove is the tire of middle pattern block
The 7%～11% of the maximum length of circumference.The central transverse tilted with this angle and middle transverse groove,
Ensure that the rigidity of the tire axial of center running lug and middle pattern block, thus improve on ice road
Turn performance.It addition, inhibited by each traverse furrow of tilting in the ditch of each traverse furrow along with
The rolling of tire and the deformation that produces, thus decrease the outflow of air, therefore pumping sound reduces.
And then, it is specified that central transverse and the middle transverse groove of average groove width, further suppress in ditch
The outflow of air.Therefore, noiseproof feature is greatly improved.
It addition, wheel rim be assembled into regular wheel rim, fill regular internal pressure, load regular load and
With in the ground plane under the camber angle of the 0 degree regular load load condition with planar ground, first hands over
The distance that point is circumferential with the tire of the second intersection point, be the ground plane length in tire equator position,
With ground plane the middle position of the tire axial of middle pattern block tire circumference length it
0.75 times～1.00 times of difference, wherein, above-mentioned first intersection point is intersected with central main groove by central transverse
And obtain, above-mentioned second intersection point is intersected with central main groove by middle transverse groove and obtains.That is, hand over due to first
Must stagger with the position of the second intersection point in the position of point, therefore inhibit central transverse and middle transverse groove
Ground connection simultaneously.Thus, the superposition of pitch noise is prevented.It addition, the sky flowed in central transverse
Gas contacts with middle pattern block and makes pumping sound reduce.Equally, the air of flowing in middle transverse groove
Contact with center running lug 5 and make pumping sound reduce.This improves noiseproof feature.It addition,
Central transverse is close with middle transverse groove.Thus, the middle section of the adjacent edges that formerly lands, central authorities
Traverse furrow occurs with middle transverse groove the most simultaneously.Now, the contact area of this middle section reduces, from
And the ground pressure of this middle section increases.Thus, the shape due to each traverse furrow by middle section
Become the snow post that rigidity is high, therefore improve snow road performance.
Accompanying drawing explanation
Fig. 1 is the expanded view of the fetus face illustrating an embodiment of the invention.
Fig. 2 is the center running lug in Fig. 1 and the enlarged drawing including middle pattern block.
Fig. 3 is the figure of the ground connection shape of the tire representing Fig. 1.
Fig. 4 is the A portion enlarged drawing of Fig. 3.
Drawing reference numeral illustrates:
3A ... central main groove；3B ... shoulder main groove；4A ... central transverse；4B ... middle transverse groove；5…
Center running lug；6 ... middle pattern block；14 ... siping；K1 ... the first intersection point；K2 ... the
Two intersection points.
Detailed description of the invention
Hereinafter, based on accompanying drawing, an embodiment of the invention is illustrated.
As it is shown in figure 1, the pneumatic tire of present embodiment (following, sometimes referred to simply as " tire ")
Such as can be preferably used as tire in winter, be provided with in tire equator C at its fetus face 2
Tire axial both sides are along a pair central main groove 3A of the circumferentially continuous extension of tire；And in these central authorities
Along a pair shoulder main groove 3B of the circumferentially continuous extension of tire outside the tire axial of tap drain 3A.It addition,
In the present embodiment, the multiple central authorities being provided with between central main groove 3A, 3A extending are horizontal
Ditch 4A；Multiple middle transverse groove 4B extended between central main groove 3A and shoulder main groove 3B；With
And between shoulder main groove 3B and earth terminal Te extend multiple tire-shoulder transverse groove 4C.
Thus, the fetus face 2 in present embodiment is configured with: center running lug row 5R, these central authorities
During pattern block row 5R is by being marked off with central transverse 4A by a pair central main groove 3A, 3A
Centre pattern block 5 arranges along tire circumferentially spaced and forms；A pair middle pattern block row 6R, this is a pair
Middle pattern block row 6R is by by central main groove 3A, shoulder main groove 3B and middle transverse groove 4B
The middle pattern block 6 marked off arranges along tire circumferentially spaced and forms；And pattern block on tire shoulder row
7R, this pattern block on tire shoulder row 7R are by by shoulder main groove 3B, earth terminal Te and tire-shoulder transverse groove
Multiple pattern block on tire shoulders 7 that 4C marks off form along tire circumferential array.
In the present embodiment, as tire in winter, for stepping on by all pattern blocks 5 to 7
The gross area Mb in face, fill out relative to by all ditch 3A, 3B and the 4A to 4C of fetus face 2
For the land ratio that the ratio (Mb/Ma) of total surface area Ma of the tyre surface of flat gained represents, should
Land ratio is set as 68%～72%.Thereby, it is possible to balancedly improve ice road performance and Xue Lu performance
And drainage performance.
For the tread contour of present embodiment, centered by the arbitrfary point in tire equator C,
In addition to variable pitch, it is essentially formed as point-symmetric decorative pattern.
Described " earth terminal " Te is defined as following location, i.e. regular wheel rim is assembled into for wheel rim
(not shown), the tire filled under the non-loaded normal state after regular internal pressure, load regular
Load and with the camber angle of 0 degree with under regular load load condition during planar ground near wheel
The earthing position that tire is axially external.Further, by the tire axial between this earth terminal Te, Te
Distance is defined as tyre surface ground connection width TW.In the case of non-Special Statement, the chi in each portion of tire
Very little etc. is the value measuring gained under this normal state.
Described " regular wheel rim " refers in the schematism including the specification include tire institute foundation
The wheel rim of each specification is specified according to each tire, if JATMA then represents " standard rim ",
If TRA then represents " Design Rim ", if ETRTO then represents " Measuring Rim ".
It addition, described " regular internal pressure " refers in the schematism including the specification include tire institute foundation
The air pressure of each specification is specified according to each tire, if JATMA is then set to " hyperbar ",
If TRA is then set to table " TIRE LOAD LIMITS AT VARIOUS COLD
INFLATION PRESSURES " in described maximum, if ETRTO is then set to
" INFLATION PRESSURES ", at tire in the case of car, is set to this air pressure
180kPa。
It addition, " regular load " refers to root in the schematism including the specification include tire institute foundation
The load of each specification is specified according to each tire, if JATMA then represents " maximum load capability ",
If TRA then represents table " TIRE LOAD LIMITS AT VARIOUS COLD
INFLATION PRESSURES " in described maximum, if ETRTO then represents
" LOAD CAPACITY ", at tire in the case of car, is set to this load and described load
The 88% suitable load of lotus.
Each tap drain 3A, 3B of present embodiment extend along tire circumference indentation.Due to this
Tap drain 3A, 3B add the marginal element of tire axial, therefore increase snow post shear strength, driving
Power and brake force etc..Thus, improve snow road performance, ice road performance.Further, since this master
Ditch 3A, 3B have upset the gas column sympathetic response in ditch, therefore improve noiseproof feature.
For each tap drain 3A, 3B furrow width (furrow width at a right angle with the length direction of ditch, the most right
Other ditch is too) W1 and ditch depth (not shown), it is possible to carry out various regulation by convention.But,
In the case of the furrow width of these ditches or ditch depth are little, the snow road performance of tire is likely deteriorated.On the contrary,
In the case of the furrow width of these ditches or ditch depth are big, the ice road performance of tire, noiseproof feature likely become
Difference.Therefore, the furrow width W1 of tap drain 3A, 3B is such as preferably the 3%～9% of tyre surface ground connection width TW.
The ditch depth of tap drain 3A, 3B is such as preferably 6mm～15mm.
In order to balancedly guarantee the rigidity of the tire axial of each pattern block 5 to 7, central main groove 3A with
Tire axial distance L1 between tire equator C, preferably tyre surface ground connection width TW
5%～15%.Tire axial distance L2 between shoulder main groove 3B and tire equator C, preferably tire
The 25%～35% of face ground connection width TW.Although additionally, the respective position of each tap drain 3A, 3B
Determined by their ditch center line, but be saw at the most each tap drain 3A, 3B
Dentation non-directional in the case of, use center line G1, G2 of amplitude of ditch center line.
Fig. 2 shows the center running lug 5 in Fig. 1 and the enlarged drawing of middle pattern block 6.Such as figure
Shown in 2, for the Breadth Maximum Wa of the tire axial of center running lug 5, preferably middle pattern block
1.04 times～1.14 times of the Breadth Maximum Wb of the tire axial of 6.Thus, improve ice road, snow
Driving force on road, brake force.
Central transverse 4A relative to tire axial with the angle [alpha] 1 of 5 °～20 ° towards the side of tire axial
(being towards upper right in FIG) tilts.That is, in the case of angle [alpha] 1 is less than 5 °, due in
The outflow of the air in the traverse furrow 4A of centre increases along with the rolling of tire, therefore causes pumping sound
Increase.In the case of angle [alpha] 1 is more than 20 °, the rigidity of the tire axial of center running lug 5 subtracts
Little, thus cause turn performance to be deteriorated.Therefore, the angle [alpha] 1 of central transverse 4A is preferably 7 °
Above, and preferably less than 18 °.Additionally, utilize the openend 8 of the both sides of central transverse 4A
The imagining center line 8c that links of midpoint 8e straight line carry out the angle [alpha] 1 of regulation central transverse 4A,
Described openend 8 is formed between outer end 9a, 9a of costa colpi 9,9 of the both sides of traverse furrow.Hereinafter,
For other traverse furrow angle too.
For shown in average groove width W2g(Fig. 1 of central transverse 4A), it is defined as central authorities' flower
The 7%～15% of maximum length L3 of the tire circumference of line block 5.Average in central transverse 4A
In the case of the 7% of maximum length L3 of furrow width W2g deficiency center running lug 5, central transverse
The ditch volume of 4A reduces, thus causes avenging post shear strength and be deteriorated.On the contrary, in average groove width W2g
Exceed center running lug 5 maximum length L3 15% in the case of, center running lug row 5R
Land portion area reduce, thus cause ice road degradation.It addition, in average groove width W2g
In the case of great, pumping sound increases, thus causes noiseproof feature to be deteriorated.Therefore, horizontal for central authorities
Average groove width W2g of ditch 4A, preferably the 9% of maximum length L3 of center running lug 5 with
On, and preferably center running lug 5 maximum length L3 less than 13%.Wherein, described " flat
All furrow widths " say is that the length utilizing ditch center line 8i is divided by under described regular load load condition
The furrow width of the area gained of the traverse furrow of ground plane, the average groove width below for other ditch is also carried out same
The definition of sample.
In the present embodiment, the furrow width of central transverse 4A is from the central portion 10b court of tire axial
Both ends 10a is gradually increased.This central transverse 4A by the snow in ditch successfully towards central main groove
3A discharges, thus improves snow road performance.Additionally, the furrow width W2e at both ends 10a is excessive
In the case of, it is possible to the pumping sound in central transverse 4A increases and causes noiseproof feature to be deteriorated.
Therefore, for the furrow width W2c of the furrow width W2e of both ends 10a, preferably central portion 10b
More than 1.3 times, more than 1.5 times of more preferably furrow width W2c, and, preferably furrow width W2c
Less than 3.0 times, less than 2.8 times of more preferably furrow width W2c.
The width of the central portion 10b of central transverse 4A is certain.The central portion 10b of present embodiment
Compared with the part of its both sides, bigger relative to the angle of tire axial.Thus, central transverse 4A
Bend to crank-like.When avenging turning on road, the snow post shear strength of the traverse furrow 4A of this crank-like
Greatly.Further, since the flowing of the air hampered in central transverse 4A, therefore improve noise
Performance.
As it is shown in figure 1, middle transverse groove 4B relative to tire axial with the angle [alpha] 2 of 5 °～25 ° towards with
The side (being towards upper left in FIG) that central transverse 4A is contrary tilts.That is, in angle [alpha] 2
In the case of 5 °, due to flowing out along with the rolling of tire of the air in middle transverse groove 4B
And increase, therefore cause pumping sound to increase.In the case of angle [alpha] 1 is more than 25 °, middle decorative pattern
The rigidity of the tire axial of block 6 reduces, thus causes the turn performance on ice road to be deteriorated.Therefore,
The angle [alpha] 2 of middle transverse groove 4B is preferably more than 7 °, and preferably less than 23 °.
Though not carrying out particular determination, but the angle [alpha] 2 of preferred middle transverse groove 4B is more than central transverse
The angle [alpha] 1 of 4A.That is, the angle [alpha] 1 in central transverse 4A is more than the angle of middle transverse groove 4B
In the case of α 2, it is possible to when keeping straight on traveling, effect has the central transverse of big ground pressure
The snow post shear strength of 4A reduces and causes craspedodrome stability to be deteriorated.Additionally, in middle transverse groove 4B
The angle [alpha] 2 angle [alpha] 1 than central transverse 4A excessive in the case of, it is possible to middle pattern block
The rigidity of the tire axial of 6 reduces and causes the turn performance on ice road to be deteriorated.Therefore, for angle
The difference α 2-α 1 of degree, preferably more than 2 °, more preferably more than 4 °, additionally, it is preferred that be less than 8 °,
More preferably less than 6 °.
For average groove width W3g of middle transverse groove 4B, it is defined as the wheel of middle pattern block 6
Tire circumference maximum length L4(Fig. 2 shown in) 7%～11%.Average in middle transverse groove 4B
In the case of the 7% of described maximum length L4 of furrow width W3g deficiency middle pattern block 6, middle
The ditch volume of traverse furrow 4B reduces, thus causes avenging post shear strength and be deteriorated.On the contrary, in average groove width
In the case of W3g exceedes the 11% of maximum length L4 of middle pattern block 6, cause noiseproof feature,
Ice road degradation.Therefore, for average groove width W3g of middle transverse groove 4B, it is preferably middle
More than the 8% of maximum length L4 of pattern block 6, and preferably the greatly enhancing most of middle pattern block 6
Less than the 10% of degree L4.In the present embodiment, middle transverse groove 4B is formed with certain furrow width.
Thus, the rigidity making the tire circumference of middle pattern block 6 is uniform throughout tire axial, thus improves
Brake force, driving force.
Middle transverse groove 4B is formed as crank-like, including: a pair middle outside portion 12a, this centering
Between outside portion 12a in the both sides of length direction linearly relative to tire axial with certain angle
Degree tilts；And centre inside portion 12b, this middle inside portion 12b are by outside above-mentioned a pair centre
Link between portion 12a, 12a and to tilt than above-mentioned middle angle bigger for outside portion 12a.
Owing to the middle inside portion 12b of this middle transverse groove 4B hampers the air in middle transverse groove 4B
Flowing, therefore improve noiseproof feature.
In the present embodiment, tire-shoulder transverse groove 4C towards the lopsidedness contrary with middle transverse groove 4B (
Fig. 1 is towards lower-left).Thus, central transverse 4A, middle transverse groove 4B and tire-shoulder transverse groove 4C
Relative to tire axial with the most different towards configuration.Therefore, by each traverse furrow 4A to 4C
And by the pumping acoustic disturbance in ditch disorderly, thus further increase noiseproof feature.
Preferably, tire-shoulder transverse groove 4C tilts with the angle [alpha] 3 of 5 °～20 ° relative to tire axial.By
This, it is possible to reduce the pumping sound in ditch, air column resonance noise from shoulder main groove 3B.
Tire-shoulder transverse groove 4C extends along tire axial zigzag.Had by this tire-shoulder transverse groove 4C
The gas column sympathetic response from shoulder main groove 3B is upset on effect ground, thus further increases noiseproof feature.
In order to balancedly improve row's snow performance and noiseproof feature, the furrow width W4 example of tire-shoulder transverse groove 4C
Preferably such as 3mm～7mm.
In order to balancedly improve snow road performance, ice road performance and noiseproof feature, for this central authorities
The ditch depth (not shown) of traverse furrow 4A, middle transverse groove 4B and tire-shoulder transverse groove 4C, preferably 4mm
Above, more preferably more than 6mm, additionally, it is preferred that be below 12mm, more preferably 10mm
Below.
Center running lug 5 and middle pattern block 6 are respectively arranged with multiple siping 14.Therefore,
Ice road performance is improve by the edge effect of siping 14.
In the present embodiment, siping 14 is formed as the siping of semi open model, i.e.
One end of this siping 14 formed in pattern block 5,6 terminal and the other end tap drain 3A,
3B opening.This siping 14 balancedly ensure that the rigidity of edge effect and pattern block.
In the present embodiment, by the openend of each siping 14 of center running lug 5 alternately
Be arranged at circumferential edge 5a of both sides of tire axial of center running lug 5.Thus, it is ensured that
High rigidity in the tire circumference of center running lug 5.According to same viewpoint, by centre decorative pattern
The openend of each siping 14 of block 6 is also alternately arranged the tire axle in middle pattern block 6
Circumferential edge 6a of both sides upwards.
In the present embodiment, pattern block on tire shoulder 7 is provided with the siping 15a of semi open model,
One end of this siping 15a is at shoulder main groove 3B opening, and the other end is in pattern block on tire shoulder 7
Form terminal；And enclosed siping 15b, the two ends of this siping 15b are at tire shoulder
Terminal is formed in pattern block 7.Thus, it is ensured that effect has the tire shoulder of big cross force when turning
The rigidity of pattern block 7.
Fig. 3 shows under the airtyred above-mentioned regular load load condition of present embodiment
Ground plane S.As it is shown on figure 3, ground plane S possesses: the ora terminalis of the side that first lands of direction of rotation is i.e.
First destination edge Sa(Fig. 3 is the ora terminalis of upside)；And the end of the side that lands after direction of rotation
Edge i.e. after destination edge Sb(Fig. 3 is the ora terminalis of downside).First destination edge Sa be formed as,
Towards the convex that the side projecting degree that first lands is maximum at the Ce of tire equator position.Land after it addition,
Edge Sb is formed as, the convex that the side projecting degree that lands backwards at the Ce of tire equator position is maximum.
That is, in the ground plane S of present embodiment, ground plane length at the Ce of tire equator position
L5, more than ground plane tire week at the centre position 6c of the tire axial of middle pattern block 6
To length L6.
In ground plane S, central transverse 4A and central main groove 3A are intersected to the first of gained
Intersection point K1 and middle transverse groove 4B intersect with central transverse 3A gained the second intersection point K2 between
Tire circumference distance La, be defined as ground plane length at the Ce of tire equator position
L5 and the ground plane tire circumference at the centre position 6c of the tire axial of middle pattern block 6
0.75 times～1.00 times of difference (L5-L6) of length L6.That is, due to the first intersection point K1's
Must stagger in the position of position and the second intersection point K2, therefore inhibit central transverse 4A with middle
Traverse furrow 4B ground connection simultaneously.Thus, the superposition of pitch noise is prevented.It addition, in central transverse 4A
The air of interior flowing contacts with middle pattern block 6 and makes pumping sound reduce.Equally, in middle transverse groove
In 4B, the air of flowing contacts with center running lug 5 and makes pumping sound reduce.This improves
Noiseproof feature.It addition, central transverse 4A is close with middle transverse groove 4B.Thus, formerly land
Middle section Sc near edge Sa, central transverse 4A occurs with middle transverse groove 4B the most simultaneously.
Now, the contact area of this middle section Sc reduces, thus the ground pressure of this middle section Sc
Increase.Thus, form, due to each traverse furrow 4A, 4B of middle section Sc, the snow post that rigidity is high,
Therefore improve snow road performance.Wherein, what described middle section Sc said is following region, i.e.
By first destination edge Sa, with above-mentioned elder generation in tire circumference destination edge Sa near first landing
One end Sd of side separate the distance of the 16% of tyre surface ground connection width TW tire circumferential position, with
And region that two ends 6n, 6n of the tire axial of middle pattern block 6 surrounds (in figure 3, by
Hacures illustrate).It addition, intersection point K1 is the described midpoint 8e of central transverse 4A.It addition, hand over
Point K2 is the midpoint 13e of the openend 13 of middle transverse groove 4B.
Between intersection point K1, K2 tire circumference distance La deficiency tire circumference length it
In the case of difference 0.75 times of (L5-L6), the flowing of central transverse 4A air not with centre
Pattern block 6 contacts but flows in middle transverse groove 4B.It addition, in the flowing of middle transverse groove 4B
Air will not contact with center running lug 5.Therefore, pumping sound is not lowered.In further, since
Almost ground connection, the therefore superposition of generation pumping sound simultaneously of centre traverse furrow 4A and middle transverse groove 4B.Cause
And, cause noiseproof feature to be deteriorated.It addition, exceed 1.00 times of poor (L5-L6) in distance La
In the case of, central transverse 4A separates with middle transverse groove 4B, therefore cannot reduce middle section
The contact area of Sc, and then the ground pressure of this middle section Sc cannot be reduced.Thus, each horizontal stroke
The rigidity of the snow post of ditch 4A, 4B reduces, thus causes avenging road degradation.Therefore, for handing over
Distance La of some tire circumference between K1, K2, the preferably difference of the length of tire circumference
(L5-L6) more than 0.80 times, additionally, it is preferred that be the difference (L5-L6) of the length of tire circumference
Less than 0.95 times.
Though additionally, non-particular determination, but if the difference (L5-L6) of the length of tire circumference reduces,
Then in order to increase the ground pressure of middle section Sc, need to reduce the wheel between intersection point K1, K2
Distance La of tire circumference, it is possible to noiseproof feature cannot be improved.On the contrary, if tire is circumferential
The difference (L5-L6) of length increase, it is likely that the area of ground plane S reduces and causes avenging road
Degradation.Therefore, for the difference (L5-L6) of the length of tire circumference, preferably ground plane exists
More than 0.015 times of length L5 at the Ce of tire equator position, more preferably length L5
More than 0.020 times, additionally, it is preferred that be less than 0.045 times of length L5, more preferably length
Less than 0.040 times of L5.
Fig. 4 shows the A portion enlarged drawing of Fig. 3.As shown in Figure 4, in the present embodiment,
Tire circumferential zones R between the first intersection point K1 and the second intersection point K2 is formed with central spud
17, this central spud 17 highlights and shape towards central main groove side by making the local of center running lug 5
Become.This central spud 17 improves between central spud 17,17 adjacent in tire circumference
Central main groove 3A near ground pressure.Thus, define in central main groove 3A hard
Snow post.Therefore, snow post shear strength increases, thus improves snow road performance.Additionally, in order to send out
Wave above-mentioned effect, at tire circumferential zones R, it is also possible to form middle protrusion (not shown) to take
For central spud 17, this middle protrusion is by making the local of middle pattern block 6 towards central main groove pleurapophysis
Go out and formed.
The central spud 17 of present embodiment is formed as approximate rectangular shape, including: along tire axial
A pair central authorities axial edge 17a, the 17a extended and separate in tire circumference；And by a pair
The centrally circumferentially edge 17b that central authorities' axial edge 17a, one end of 17a link.Further, central authorities
Axial edge 17a tilts with the angle [alpha] 4 of 0 °～20 ° relative to tire axial.Thus, further
Improve the snow post shear strength of central main groove 3A.
In order to more effectively play above-mentioned effect, make central spud 17 forms tire axial
The outer end 17e in outside, is formed at circumferential edge 6i inside than the tire axial of middle pattern block 6
The axially external position of the inner 6e roller tire of tire axial.
If additionally, the outer end 17e of central spud 17 is configured to the inner 6e mistake than circumferential edge 6i
Degree is close to outside tire axial, it is likely that the rigidity of the tire circumference of central spud 17 is deteriorated.
Therefore, for length L7 of the tire axial between described outer end 17e and inner 6e, it is preferably
More than 0.5mm, more preferably more than 1.0mm, additionally, it is preferred that be below 3.0mm, more excellent
Elect below 2.0mm as.
It addition, in ground plane S, along first the incline direction of destination edge Sa and produce big connecing
Ground pressure.Therefore, as it is shown on figure 3, in the present embodiment, due to a side of tire axial
Middle transverse groove 4B(is the middle transverse groove in left side in figure 3) destination edge Sa identical for Xiang Yuxian
Direction tilts, so the snow cylindricality formed by this middle transverse groove 4B becomes has high rigidity.
It addition, middle transverse groove 4B(of the opposing party of tire axial is the middle horizontal of right side in figure 3
Ditch) relative to tire axial be formed at first the contrary side of the incline direction of destination edge Sa.
For this middle transverse groove 4B, the deformation of the ditch owing to being caused by ground connection is little, therefore from middle horizontal
The outflow of the air in ditch 4B is few.Therefore, middle transverse groove 4B of the opposing party, pumping sound reduces,
Thus improve noiseproof feature.I.e., in the present embodiment, by a side of tire axial
Between middle transverse groove 4B of the opposing party of traverse furrow 4B and tire axial, balancedly improve noise-induced
Neng Yuxue road performance.
Although above the pneumatic tire of the present invention being described in detail, but the present invention not office
It is limited to above-mentioned detailed description of the invention, it is possible to be changed to various mode and be carried out.
Embodiment
The motif and a size of with Fig. 1 has been manufactured experimently based on the specification in table 1
The pneumatic tire of 195/80R15, and to each for the examination noiseproof feature of the tire, (braking of ice road performance
Power) and snow road performance be tested.Wherein, common specification is as follows.
Tyre surface ground connection width TW:160mm
<tap drain>
Furrow width W1:3mm～5mm
Ditch depth: 12.3mm
Tire axial distance L1 of the ditch center line of central main groove and the ratio of tyre surface ground connection width TW
(L1/TW): 0.09
Tire axial distance L2 of the ditch center line of shoulder main groove and the ratio of tyre surface ground connection width TW
(L2/TW): 0.28
<traverse furrow>
Angle [alpha] 1:9 ° of central transverse
Angle [alpha] 2:12 ° of middle transverse groove
Furrow width W4:3mm～5mm of tire-shoulder transverse groove
Angle [alpha] 3:10 ° of tire-shoulder transverse groove
The ditch depth of each traverse furrow: 6.5mm～10.0mm
<pattern block>
Extrorse angle [alpha] 4:8 ° of the axis of centres～11 °
The Breadth Maximum Wb:1.09 of the Breadth Maximum Wa/ middle pattern block of center running lug
Method of testing is as follows.
<snow road performance>
It is installed on, for examination tire, 4 wheel drive vehicles that capacity is 2700cc under the following conditions by each
All wheels, and by a driver drive on the test runway on Ya Xue road travel.Further,
By the sensory experience of driver evaluate with now steering wheel response, rigidity sense and grab ground
The ride characteristic that power etc. are relevant.Utilize and comparative example 1 is set to 10 point-scores of 6 points to represent result.
Numerical value is the bigger the better.
Wheel rim: 15 × 6.0J
Internal pressure: 350kPa(front-wheel)
Internal pressure: 425kPa(trailing wheel)
Load: 4.0kN
<ice road performance (brake force)>
Above-mentioned test vehicle is utilized to travel on the test runway on ice road, from the speed of 30km/h
Implement brake hard, the braking distance till stopping is measured.Utilize comparative example 2
The inverse of braking distance be set to the index of 10 to represent result.Numerical value is the bigger the better.
<noiseproof feature>
Utilize above-mentioned test vehicle up at the test runway of bituminous paving with the speed of 80km/h
Sail, evaluated the noise heard in driver's cabin by the sensory experience of driver.Utilize and will compare
Example 1 is set to 10 point-scores of 6 points to represent result.Numerical value is the bigger the better.
Table 1 shows test result.
Table 1
Test result is able to confirm that: the tire of embodiment, compared with the tire of comparative example, contributes to carrying
Noise performance, snow road performance and ice road performance.
Claims (4)
1. a pneumatic tire, this pneumatic tire is by arranging at fetus face: in tire equator
Tire axial both sides are along a pair central main groove of the circumferentially continuous extension of tire；Wheel in this central main groove
Axially external a pair shoulder main groove along the circumferentially continuous extension of tire of tire；Between described central main groove
The multiple central transverse extended；And extension between described central main groove and described shoulder main groove
Multiple middle transverse groove,
Thus making fetus face have: center running lug arranges, this center running lug arranges by the pair of
The center running lug that centre tap drain and described central transverse mark off arranges along tire circumferentially spaced and forms；
And a pair middle pattern block row, this middle pattern block is arranged by described shoulder main groove, described in
The middle pattern block that centre tap drain and described middle transverse groove mark off is along the setting of tire circumferentially spaced
Become,
Described airtyred it is characterised by,
Described center running lug and described middle pattern block are respectively arranged with multiple siping,
Described central transverse relative to tire axial with the angle of 5 °～20 ° towards the side of tire axial
Tilt, and tire that the average groove width of described central transverse is described center running lug circumference is
The 7%～15% of long length,
Described middle transverse groove relative to tire axial with the angle of 5 °～25 ° towards and described central transverse
Contrary lopsidedness, and the wheel that the average groove width of described middle transverse groove is described middle pattern block
The 7%～11% of the maximum length of tire circumference,
Described center running lug be formed through make this center running lug partially toward central main groove
The central spud that side highlights, described central spud formed tire axial outermost outside
End, is formed in the tire axial of the circumferential edge inside than the tire axial of described middle pattern block
The position that end roller tire is axially external,
It is assembled into regular wheel rim at wheel rim, fills regular internal pressure, load regular load and with 0 degree
Camber angle and planar ground regular load load condition under ground plane in, the first intersection point and the
The distance of the tire circumference of two intersection points is described ground plane in the length of tire equator position and
Described ground plane the middle position of the tire axial of described middle pattern block tire circumference
0.75 times of the difference of length～1.00 times, wherein, described first intersection point by described central transverse with in
Centre tap drain intersects and obtains, and described second intersection point is adjacent with described first intersection point across described central spud
Connect and intersected with central main groove by described middle transverse groove and obtain.
Pneumatic tire the most according to claim 1, it is characterised in that
The furrow width of described central transverse is gradually increased towards both ends from the central portion of tire axial.
Pneumatic tire the most according to claim 1 and 2, it is characterised in that
In ground plane under described regular load load condition,
The described ground plane length in described tire equator position and described ground plane are in described
Between the difference of length of tire circumference of middle position of tire axial of pattern block be, described ground connection
0.015～0.045 times of the face length in described tire equator position.
Pneumatic tire the most according to claim 1, it is characterised in that
Wheel between described outer end and described the inner of described middle pattern block of described central spud
Tire axial a length of 0.5～3.0mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-177471 | 2012-08-09 | ||
| JP2012177471A JP5671503B2 (en) | 2012-08-09 | 2012-08-09 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103568735A CN103568735A (en) | 2014-02-12 |
| CN103568735B true CN103568735B (en) | 2016-08-24 |
Family
ID=50041780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310343813.6A Active CN103568735B (en) | 2012-08-09 | 2013-08-08 | Pneumatic tire |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5671503B2 (en) |
| KR (1) | KR101963908B1 (en) |
| CN (1) | CN103568735B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5695613B2 (en) * | 2012-08-10 | 2015-04-08 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6013954B2 (en) * | 2013-03-18 | 2016-10-25 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6380529B2 (en) * | 2014-05-22 | 2018-08-29 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6110825B2 (en) * | 2014-09-25 | 2017-04-05 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6450174B2 (en) * | 2014-12-08 | 2019-01-09 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6130824B2 (en) * | 2014-12-09 | 2017-05-17 | 住友ゴム工業株式会社 | Heavy duty pneumatic tire |
| JP6438329B2 (en) * | 2015-03-16 | 2018-12-12 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6558124B2 (en) * | 2015-07-31 | 2019-08-14 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6551028B2 (en) * | 2015-08-06 | 2019-07-31 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP6493542B2 (en) * | 2016-07-19 | 2019-04-03 | 横浜ゴム株式会社 | Pneumatic tire |
| JP7069994B2 (en) * | 2018-04-10 | 2022-05-18 | 住友ゴム工業株式会社 | tire |
| JP7192325B2 (en) * | 2018-09-06 | 2022-12-20 | 横浜ゴム株式会社 | pneumatic tire |
| CN109435584A (en) * | 2018-12-27 | 2019-03-08 | 正新橡胶（中国）有限公司 | Vehicle and its pneumatic tire |
| JP7230673B2 (en) * | 2019-05-07 | 2023-03-01 | 横浜ゴム株式会社 | pneumatic tire |
| JP2021084593A (en) * | 2019-11-29 | 2021-06-03 | 株式会社ブリヂストン | tire |
| JP7384017B2 (en) * | 2019-12-13 | 2023-11-21 | 住友ゴム工業株式会社 | tire |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08197913A (en) * | 1995-01-26 | 1996-08-06 | Bridgestone Corp | Studless pneumatic tire for heavy load |
| JP2003054221A (en) * | 2001-06-06 | 2003-02-26 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| CN101070045A (en) * | 2006-05-10 | 2007-11-14 | 横滨橡胶株式会社 | Inflatable tyre |
| CN101992660A (en) * | 2009-08-21 | 2011-03-30 | 住友橡胶工业株式会社 | Pneumatic tire |
| JP2012086665A (en) * | 2010-10-19 | 2012-05-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3459715B2 (en) * | 1996-01-22 | 2003-10-27 | 住友ゴム工業株式会社 | Pneumatic tire |
-
2012
- 2012-08-09 JP JP2012177471A patent/JP5671503B2/en active Active
-
2013
- 2013-08-07 KR KR1020130093608A patent/KR101963908B1/en active IP Right Grant
- 2013-08-08 CN CN201310343813.6A patent/CN103568735B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08197913A (en) * | 1995-01-26 | 1996-08-06 | Bridgestone Corp | Studless pneumatic tire for heavy load |
| JP2003054221A (en) * | 2001-06-06 | 2003-02-26 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| CN101070045A (en) * | 2006-05-10 | 2007-11-14 | 横滨橡胶株式会社 | Inflatable tyre |
| CN101992660A (en) * | 2009-08-21 | 2011-03-30 | 住友橡胶工业株式会社 | Pneumatic tire |
| JP2012086665A (en) * | 2010-10-19 | 2012-05-10 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101963908B1 (en) | 2019-03-29 |
| JP5671503B2 (en) | 2015-02-18 |
| JP2014034333A (en) | 2014-02-24 |
| KR20140020772A (en) | 2014-02-19 |
| CN103568735A (en) | 2014-02-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103568735B (en) | Pneumatic tire | |
| KR101562679B1 (en) | Pneumatic tire | |
| CN104057785B (en) | Air-inflation tyre | |
| CN103832220B (en) | Pneumatic tire | |
| CN103223824B (en) | Pneumatic tire | |
| CN105358339B (en) | Pneumatic tire | |
| CN105473351B (en) | Pneumatic tire | |
| CN103991336B (en) | Pneumatic tire | |
| CN103802608B (en) | Pneumatic tire | |
| CN103895453B (en) | Pneumatic tire | |
| CN104044409B (en) | Pneumatic tire | |
| CN103991337B (en) | Pneumatic tire | |
| CN103381741A (en) | Pneumatic tire | |
| CN104044407B (en) | Pneumatic tire | |
| CN105644273A (en) | Pneumatic tire | |
| CN104349915B (en) | Air-inflation tyre | |
| CN104139672B (en) | Pneumatic tire | |
| CN104118277B (en) | Pneumatic tire | |
| CN107206848A (en) | Pneumatic tire | |
| CN103991339A (en) | Heavy duty pneumatic tire | |
| JP6571093B2 (en) | Pneumatic tire | |
| CN106042783A (en) | Pneumatic tire | |
| CN103963570A (en) | Pneumatic tire | |
| CN104723800A (en) | Pneumatic tire | |
| CN106604833A (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |