CN106976362A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN106976362A CN106976362A CN201710023977.9A CN201710023977A CN106976362A CN 106976362 A CN106976362 A CN 106976362A CN 201710023977 A CN201710023977 A CN 201710023977A CN 106976362 A CN106976362 A CN 106976362A
- Authority
- CN
- China
- Prior art keywords
- tire
- central
- translot
- width direction
- kink
- 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.)
- Granted
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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
- B60C11/0327—Tread patterns characterised by special properties of the tread pattern
- B60C11/0332—Tread patterns characterised by special properties of the tread pattern by the footprint-ground contacting area of the tyre tread
-
- 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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1259—Depth of the sipe
-
- 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
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1272—Width of the sipe
-
- 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
- B60C2200/00—Tyres specially adapted for particular applications
- B60C2200/06—Tyres specially adapted for particular applications for heavy duty vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
A kind of pneumatic tire that can simultaneously improve and do ground performance and snowfield performance is provided.Possess：A pair of inside circumferential slot (21), it is disposed in the both sides of the equatorial plane (CL) on tire width direction；A pair of outside circumferential slot (25), it is disposed in the respective outside of a pair of inside circumferential slot (21) on tire width direction；Central translot (31), its two ends is connected with a pair of inside circumferential slot (21), and with circumferentially extending portion (33) and the width extension (34) extended on tire width direction in tire circumference；Central block (11), it is divided by central translot (31) and inner circumferential groove (21)；And kink recess (40), it is formed at the position of the bad angle side of kink (32), and it is connected with circumferential extensions (33) and width extension (34), contact area ratio in middle section is more than 30% and less than 70%, the middle section is 10% region of the width on the tire width direction of central block (11) centered on the center of the central block (11) on tire width direction.
Description
Technical field
The present invention relates to pneumatic tire.
Background technology
Pneumatic tire is formed with groove mainly for ensuring drainage in tread surface, still, if groove crosses at most land portion
Rigidity reduction, so that control stability and/or wear resistance reduction, therefore in the presence of the arranging to groove in conventional pneumatic tire
Form is made an effort, and thus seeks the technology of the raising of their opposite performance.For example, in the inflated wheel described in patent document 1
In tire, arrangement arranges four circumferential slots extended along the circumferential zigzag of tire on tire width direction, in four circumferences
The translot for being formed as bent axle shape is equipped between two circumferential slots of the inner side on tire width direction in groove, is thus sought
Ask the raising in the traction property and wear resistance on wetland road surface.
Prior art literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2006-111122 publications
The content of the invention
Problems to be solved by the invention
Here, pneumatic tire because traveling when vehicle weight and grounding characteristics change, especially, in unloaded goods
In the difference of the weight of state and the weight of goods full load very big truck and/or car, the change of the weight of escort vehicle
Grounding characteristics are changed significantly.For example, in truck and/or car, in the overlapping vehicle for installing multiple wheels, without loading
When the state of thing is empty wagons, be mounted with the state of goods i.e. entrucking when compared, the contact area with road surface in pneumatic tire
It is small, it is grounded only near middle section.So, in the case where contact area is small, tread surface and the road surface of pneumatic tire it
Between easily skid, therefore in order to prevent skid, preferably reduce middle section near groove area ratio, still, if reduce groove
Area is reduced than the driving performance then in snow road.
That is, pneumatic tire tyre surface formation groove in addition to drainage, be also to the driving performance in snow road
Snowfield performance has been contributed.But, can be by increasing relative to the driving performance dry ground performance in dry road traveling
Adjunction ground area improves performance, and snowfield performance is then main improves snow post shearing force etc. raising property by increasing groove area
Can, therefore dry ground performance and key element of the snowfield performance for antinomy.Accordingly, it is difficult to improve dry ground performance and snowfield simultaneously
Can, especially, dry ground performance and snowfield independently, are i.e. independently taken into account with empty wagons and/or entrucking with the loading condition of goods
Can be very difficult.
The present invention is that its object is to can improve dry ground performance and snow simultaneously there is provided one kind in view of above-mentioned and make
The pneumatic tire of ground performance.
Technical teaching for solving the problem was
The problem of in order to solve above-mentioned, achieve the goal, pneumatic tire of the invention is characterised by possessing：A pair of inside
Circumferential slot, it clips equatorial plane and is disposed in the both sides of the equatorial plane on tire width direction, and in tire
Week upwardly extends；A pair of outside circumferential slot, it is disposed in the respective of inner circumferential groove described in a pair on tire width direction
Outside, and upwardly extended in tire week；Multiple central translots, its two ends are connected with inner circumferential groove described in a pair, and many
Thus individual position bending has circumferentially extending portion and the width side extended on tire width direction in tire circumference
To extension；Central block, it is the land portion marked off by the central translot and the inner circumferential groove；And kink is recessed
Portion, it is recessed and shape by the position of the bad angle side of the kink of the central translot in the central block from tread surface
Into, and be connected with the circumferential extensions and the width extension, the contact area ratio in middle section is
More than 30% and less than 70%, the middle section is centered on the center of the central block on tire width direction, institute
State 10% region of the width on the tire width direction of central block.
In addition, in above-mentioned pneumatic tire, preferably described circumferential extensions is located in the middle section.
In addition, in above-mentioned pneumatic tire, preferably described kink recess is formed by chamfering.
In addition, in above-mentioned pneumatic tire, preferably described kink recess is formed as, and is connected with the circumferential extensions
Partly and with the part that the width extension is connected it is equal length.
In addition, in above-mentioned pneumatic tire, preferably described kink recess is formed as, and the depth away from the tread surface exists
In more than the 20% of groove depth and less than 50% scope of the central translot.
In addition, in above-mentioned pneumatic tire, being preferably formed with central gap portion in the central block, the central gap portion is set
On the extended line for being placed in the width extension, and one end is connected with the kink, and the other end is in the central block
It is interior to terminate.
In addition, in above-mentioned pneumatic tire, preferably described central gap portion is formed as, along the width extension
Formation direction direction the central block of the length on tire width direction width more than 10% and less than 20%
In the range of.
In addition, in above-mentioned pneumatic tire, the kink recess and the central gap portion are preferably to be connected to jointly
The aperture area A2 relation in aperture area A1 and the central gap portion of the kink recess of the kink be 3
≤(A2/A1)≤6。
In addition, in above-mentioned pneumatic tire, it is preferred that possess：Multiple middle translots, its two ends with it is adjacent it is described in
Side circumferential slot and external circumferential groove connection；Multiple tire shoulder translots, it is disposed in the tyre width side of the external circumferential groove
Upward outside, one end is connected with the external circumferential groove；Intermediate mass, it is by the inner circumferential groove, the external circumferential
The land portion that groove and the middle translot are marked off；And shoulder block, it is by the external circumferential groove and the tire shoulder translot
The land portion marked off, central indentation portion is formed with the intermediate mass, and the central indentation portion is arranged at prolonging for the tire shoulder translot
On long line, and one end is connected with the external circumferential groove, and the other end is terminated in intermediate mass, and tire is formed with the shoulder block
Shoulder notch part, the tire shoulder notch part is arranged on the extended line of the middle translot, and one end connects with the external circumferential groove
Connect, the other end is terminated in shoulder block.
In addition, in above-mentioned pneumatic tire, preferably described middle translot is formed as, it is circumferential relative to tire to tyre width
The angle of inclination in direction is more than 75 ° and in less than 105 ° of scope.
In addition, in above-mentioned pneumatic tire, the middle translot and the tire shoulder translot be preferably, the middle translot
It is circumferential relative to tire to tire circumferentially to the tilt angle alpha 1 and the tire shoulder translot of tire width direction relative to tire
The relation of the tilt angle alpha 2 of width be 0 °≤| α 2- α 1 |≤10 °.
In addition, in above-mentioned pneumatic tire, the inner circumferential groove and the external circumferential groove are preferably that the inner side is all
It is groove width W1 from 0.5≤(W2/W1)≤0.9 to groove and the groove width W2 of the external circumferential groove relation.
In addition, in above-mentioned pneumatic tire, the width on the tire width direction of preferably described central block deploys for tyre surface
More than the 20% of width and less than 40%.
In addition, in above-mentioned pneumatic tire, length L and tire width direction in the tire circumference of preferably described central block
On width W ratio be 0.9≤(L/W)≤1.1.
Additionally, it is preferred that the purposes of above-mentioned pneumatic tire is heavy duty pneumatic vehicle tire.
The effect of invention
The pneumatic tire of the present invention can be played while improving the effect of dry ground performance and snowfield performance.
Brief description of the drawings
Fig. 1 is the meridian sectional view of the major part for the pneumatic tire for representing embodiment.
Fig. 2 is Fig. 1 A-A direction views.
The B portions that Fig. 3 is Fig. 2 scheme in detail.
Fig. 4 is the explanation figure of kink spatial portion.
The C portions that Fig. 5 is Fig. 2 scheme in detail.
Fig. 6 A are the charts of the result for the performance test for representing pneumatic tire.
Fig. 6 B are the charts of the result for the performance test for representing pneumatic tire.
Fig. 6 C are the charts of the result for the performance test for representing pneumatic tire.
Fig. 6 D are the charts of the result for the performance test for representing pneumatic tire.
Description of reference numerals
1 pneumatic tire
2 fetus faces
3 tread surfaces
4 shoulder portion
5 sidewalls
6 carcasses
7 belts
8 inner liners
10 lands portion
11 central blocks
12 intermediate mass
13 shoulder blocks
20 circumferential slots
21 inner circumferential grooves
25 external circumferential grooves
30 translots
31 central translots
32 kinks
33 circumferential extensions
34 width extensions
35 middle translots
36 tire shoulder translots
40 kink recesses
42 kink spatial portions
45 central gap portions
46 central indentation portions
47 tire shoulder notch parts
50 bead parts
CL equatorial planes
CA middle sections
Embodiment
Hereinafter, the embodiment of the pneumatic tire of the present invention is described in detail based on accompanying drawing.In addition, the present invention is simultaneously
It is not limited to the embodiment.In addition, the inscape in following embodiments includes those skilled in the art and can replaced
And the key element or substantially the same key element being readily apparent that.
In the following description, so-called tire width direction refers to the direction parallel with the rotary shaft of pneumatic tire, so-called
Just refer in tire width direction on tire width direction towards the direction of equatorial plane, so-called tire width direction foreign side
Refer to the opposite direction towards the direction of equatorial plane on tire width direction.In addition, so-called tire radially refers to and taken turns
The direction of tire rotating shaft direct cross, so-called tire footpath inwardly just refers in tire axially towards to the direction of tire rotary shaft, so-called
Tire footpath refers to the direction left in tire radially from tire rotary shaft outward.In addition, so-called tire circumferentially refers to take turns
The direction that tire rotary shaft is pivoted about.
Fig. 1 is the meridian sectional view of the major part for the pneumatic tire for representing embodiment.Pneumatic tire 1 shown in Fig. 1
In the case of being observed in meridian sectional view, fetus face 2 is equipped in the part of the most outward side of tire radial direction, fetus face 2
Surface, the part contacted when being mounted with vehicle (omitting diagram) traveling of the pneumatic tire 1 with road surface are formed as tyre surface table
Face 3.Multiple circumferential slots 20 upwardly extended in tire week are formed with tread surface 3, and are formed with multiple and circumferential slot 20
The translot 30 (reference picture 2) of intersection.In tread surface 3, multiple land portions 10 are marked off by the multiple circumferential slot 20 and translot 30.
The two ends of fetus face 2 on tire width direction are formed as shoulder portion 4, from shoulder portion 4 to tire radial direction inward side
Predetermined position untill, be equipped with sidewall 5.That is, sidewall 5 is disposed in two of the pneumatic tire 1 on tire width direction
Two positions of side.
Moreover, bead part 50 is located at the tire radial direction inward side of each sidewall 5, bead part 50 is matched somebody with somebody in the same manner as sidewall 5
Two positions located at equatorial plane CL both sides.That is, equatorial plane CL of the bead part 50 on tire width direction
Both sides are equipped a pair.Bead core 51 is each provided with a pair of bead portion 50, is set outward in the tire footpath of each bead core 51
There is bead filler (bead filler) 55.Bead core 51 is by the way that the steel bead wire winding as steel wire is circlewise formed.Edge
Mouthful filler 55 be arranged in from the tire width direction end of carcass described later (carcass) 6 in the position of bead core 51 to wheel
Tire width outward side turn back formed by space rubber material.
Belt 7 is inwardly just provided with the tire footpath of fetus face 2.Belt 7 for example in quadriply belt beam 71,72,73,74 layers
Folded multi-ply construction, is the multiple belt cords that will be made up of the organic fiber material such as steel wire or polyester, staple fibre, nylon
Covered with fiber-reinforced rubber and roll processing and constitute.In addition, being configured to beam 71,72,73,74, the fibre of belt cord is used as
The belt cord that the dimension direction inclination angle circumferential relative to tire is defined is mutually different and makes the machine direction of belt cord mutual
Cross layered (cross-ply) be laminated across, so-called is constructed.
In the tire footpath of the belt 7, inwardly side and the equatorial plane CL sides of sidewall 5 are continuously provided with meridian
Cord in bag carcass 6.The carcass 6 has the monolayer constructions being made up of one piece of carcass ply, or by multiple carcass plies
The multi-ply construction constituted is laminated, ring-type sets up and constitutes wheel between the bead core 51 for the both sides being disposed on tire width direction
The skeleton of tire.In detail, tyre bead of the carcass 6 from the side in a pair of bead portion 50 of the both sides on tire width direction
Portion 50 is arranged to the bead part 50 of the opposing party, and in the way of wrapping into bead core 51 and bead filler 55 in bead part 50 along tire
Core 51 is enclosed to tire width direction foreign side rollback.The carcass ply of the carcass 6 so arranged uses the carcass being made up of steel
Line is steel cord, covers multiple steel cords with fiber-reinforced rubber and rolls processing and constitute.That is, carcass 6 uses steel carcass material and structure
Into.
In addition, in the inward side of carcass 6, or the carcass 6, the private side in pneumatic tire 1 is formed with along carcass 6
Inner liner 8.
Fig. 2 is Fig. 1 A-A direction views.As the circumferential slot 20 formed in tread surface 3, a pair of inside is provided with circumferential
Groove 21 and a pair of outside circumferential slot 25, the pair of inner circumferential groove 21 clip equatorial plane CL and are disposed in tire width direction
On equatorial plane CL both sides, and upwardly extended in tire week, the pair of external circumferential groove 25 is in tyre width side
The respective outside of a pair of inside circumferential slot 21 is disposed in upwards, and is upwardly extended in tire week.That is, on inner circumferential groove
21, two inner circumferential grooves 21 are disposed in the both sides of the equatorial plane CL on tire width direction, on external circumferential groove 25,
Two external circumferential grooves 25 clip two inner circumferential grooves 21 on tire width direction and are disposed in two inner circumferential grooves 21
Tire width direction on both sides.The inner circumferential groove 21 and external circumferential groove 25 are each while on tire width direction
With amplitude while being formed extended at both sides in tire circumference.
In addition, the groove width of inner circumferential groove 21 is in more than 6mm and below 15mm scope, groove depth in more than 10mm and
In below 18mm scope.In addition, the groove width of external circumferential groove 25 is in more than 4mm and below 12mm scope, groove depth is in 6mm
Above and in below 18mm scope.In addition, on inner circumferential groove 21 and external circumferential groove 25, the groove width of inner circumferential groove 21
W1 (reference picture 5) is bigger than the groove width W2 (reference picture 5) of external circumferential groove 25.In more detail, on inner circumferential groove 21 and outside
Side circumferential slot 25, the groove width W1 of inner circumferential groove 21 and the groove width W2 of external circumferential groove 25 relation for 0.5≤(W2/W1)≤
0.9, i.e. (W2/W1) is more than 0.5 and less than 0.9 relation.In addition, the groove width W1 of inner circumferential groove 21 and external circumferential groove
25 groove width W2 relation is preferably in the range of 0.6≤(W2/W1)≤0.8.
In addition to circumferential slot 20, multiple translots 30 extended on tire width direction are additionally provided with tread surface 3.Make
For translot 30, central translot 31, middle translot 35 and tire shoulder translot 36 are provided with.Wherein, central translot 31 is to be disposed in wheel
Between a pair of inside circumferential slot 21 on tire width, and the translot that two ends are connected with a pair of inside circumferential slot 21
30.In addition, middle translot 35 for be disposed in adjacent inner circumferential groove 21 on tire width direction and external circumferential groove 25 it
Between, and the translot 30 that two ends are connected with inner circumferential groove 21 and external circumferential groove 25.In addition, tire shoulder translot 36 is outer to be disposed in
Outside on the tire width direction of side circumferential slot 25, and the translot 30 that one end is connected with external circumferential groove 25.The center
Translot 31, middle translot 35 and the circumferentially upper spread configuration of each comfortable tire of tire shoulder translot 36 are multiple.
In addition, the groove width of central translot 31 is in more than 4mm and below 9mm scope, groove depth more than 9mm and 18mm with
Under scope in.In addition, the groove width of middle translot 35 is in more than 4mm and below 9mm scope, groove depth in more than 2mm and
In below 16mm scope.In addition, the groove width of tire shoulder translot 36 is in more than 4mm and below 16mm scope, groove depth 2mm with
In upper and below 16mm scope.
Central translot 31 and middle translot 35 are connected with common inner circumferential groove 21, but are connected with inner circumferential groove 21
Part tire circumference on position in central translot 31 and middle translot 35 be different.Similarly, the middle He of translot 35
Tire shoulder translot 36 is connected with common external circumferential groove 25, but in the tire circumference for the part being connected with external circumferential groove 25
Position is different in middle translot 35 and tire shoulder translot 36.
Tread surface 3 formation land portion 10 by the multiple translot 30 and multiple circumferential slots 20 mark off central block 11,
Intermediate mass 12 and shoulder block 13.Wherein, central block 11 is divided by adjacent central translot 31 and a pair of inside circumferential slot 21
The land portion 10 gone out, thus, central block 11 are located on equatorial plane CL.In addition, intermediate mass 12 is by adjacent inner circumferential groove
21 and the land portion 10 that marks off of external circumferential groove 25 and adjacent middle translot 35.In addition, shoulder block 13 is disposed on tire
The outside of external circumferential groove 25 on width, divided by adjacent tire shoulder translot 36 and on tire width direction in
The land portion 10 that side part is marked off by external circumferential groove 25.That is, shoulder block 13 is divided by external circumferential groove 25 and tire shoulder translot 36.
The central block 11, intermediate mass 12 and the circumferentially upper spread configuration of each comfortable tire of shoulder block 13 are multiple.
The B portions that Fig. 3 is Fig. 2 scheme in detail.The central translot 31 in the translot 30 in land portion 10 is divided, by curved in multiple positions
Folding is so as to the circumferentially extending portion 33 in tire circumference and the width extended on tire width direction extension
Portion 34.Specifically, a central translot 31 at two positions there is the part of bending to be kink 32, by by two positions
The bending of kink 32 so as to being formed as the shape of bent axle shape.Position folded by the kink 32 by two positions of central translot 31
Put and be formed as circumferential extensions 33.Circumferential extensions 33 is formed on equatorial plane CL, circumferential relative to tire predetermined
Tilted in scope to tire width direction.The angle of inclination circumferential relative to tire of circumferential extensions 33 more than 0 ° and 15 ° with
Under scope in.In addition, circumferential extensions 33, can be that all parts are not located on equatorial plane CL or one
The position divided is located on equatorial plane CL, and other parts are not on equatorial plane CL.
In addition, width extension 34 extends from the end of circumferential extensions 33 to tire width direction, it is thus connected
The end of circumferential extensions 33 and inner circumferential groove 21, i.e. connection kink 32 and inner circumferential groove 21.In detail, width
Direction extension 34 is arranged at two positions of each central translot 31, and the width extension 34 at two positions will be different
Kink 32 and a pair of inside circumferential slot 21 in different inner circumferential grooves 21 connect.The width extension at two positions
Portion 34 each extends while to the inclined in tire circumference on tire width direction on one side.In detail, width
Direction extension 34 is to the circumferential extensions 33 of the composition kink 32 together with the width extension 34 relative to tire
Width is inclined to the side identical side of tire peripheral, oblique with the angle at the angle of inclination different from circumferential extensions 33
Tiltedly.In addition, the width extension 34 at two positions that a central translot 31 has relative to tire width direction
Angle of inclination is roughly the same angle.
In addition, the position of the bad angle side of the kink 32 of central translot 31 in central block 11 is provided with by from tyre surface table
Kink recess 40 formed by the depression of face 3.The kink recess 40 and the circumferential extensions 33 and width for constituting kink 32
This both sides connection of direction extension 34, and from circumferential extensions 33 and width extension 34 continuously from tread surface 3
It is recessed and is formed.Chamfering that the part of the bad angle side that kink recess 40 passes through the kink 32 in central block 11 is implemented and shape
Into, on the depth direction of kink recess 40 observe in the case of, be formed as with kink 32 be an angle and with circumference
Part that extension 33 is connected and with the part that width extension 34 is connected be respectively side general triangular shape.
That is, the part for the bad angle side that kink recess 40 passes through the kink 32 in tread surface 3 from kink 32 with
Predetermined size is removed and constituted between circumferential extensions 33 and width extension 34.In the present embodiment, it is curved
Folding part recess 40 is configured to, and is equal with the part of the connection of circumferential extensions 33 and with the part that width extension 34 is connected
Length.In addition, kink recess 40 is formed as, the depth away from tread surface 3 in more than 1mm and below 8mm scope, and
And in more than the 10% of groove depth and less than 50% scope of central translot 31.
In addition, being formed with central gap portion 45 in central block 11, the central gap portion 45 is arranged at width extension
On 34 extended line, and one end is connected with kink 32, and the other end is terminated in central block 11.The central gap portion 45 is formed
For groove width is the groove width identical size with width extension 34, and groove depth is the groove depth phase with width extension 34
The shape of the channel-shaped of same depth.Therefore, in other words, width extension 34, central gap portion 45 and circumferential extensions
33 are configured to, and circumferential extensions is connected with the midway of the groove formed by width extension 34 and central gap portion 45
The form of 33 end.
As described, the central gap portion 45 being connected with the kink 32 of central translot 31 is formed as, along width side
The 10% of the width W for the central block 11 being in the length EL in the direction in the formation direction of extension 34 on tire width direction
Above and in less than 20% scope.The length EL in central gap portion 45 in this case is, from the circumference for constituting kink 32
Extension side that the mutual coupling part in side of the reflex angle side of extension 33 and width extension 34 is risen, central gap portion 45
Upward length.
In addition, on central gap portion 45 and kink recess 40, being connected to the kink recess of common kink 32
40 aperture area A1 and the aperture area A2 in central gap portion 45 relation are 3≤(A2/A1)≤6, i.e. (A2/A1) be 3 with
It is upper and less than 6 relation.
Fig. 4 is the explanation figure to kink spatial portion.Further, central gap portion 45 is formed as, by circumferential extensions 33,
The aperture area A3 and central gap portion of width extension 34 and the kink spatial portion 42 of the formation of kink recess 40
45 aperture area A2 relation is in the range of 0.03≤(A2/A3)≤0.10.In this case kink spatial portion 42 is,
By the way that circumference will be extended to as the side 41 relative with the corner of the side of kink 32 of the triangle of the shape of kink recess 40
Cell wall 33a in extension 33 and width extension 34, relative with the cell wall of the side where kink recess 40,
Spatial portion formed by 34a.
That is, kink spatial portion 42 is, with side 41, circumferential extensions 33 and the width of the kink recess 40 extended
Cell wall 33a, 34a in direction extension 34, relative with the cell wall of the side where kink recess 40 is respectively the three of side
The spatial portion of angular shape.On central gap portion 45, aperture area A3 and the central gap portion 45 of the kink spatial portion 42
Aperture area A2 ratio (A2/A3) is more than 0.03 and less than 0.10 relation.
The pneumatic tire 1 of present embodiment is formed as, the contact area ratio in middle section CA more than 30% and
In less than 70% scope, middle section CA is the central block that the main both sides including in tire circumference are divided by central translot 31
11 and the region of central translot 31.In this case middle section CA is, with the center of the central block 11 on tire width direction
That is centered on central block center BC, 10% region of the width W on the tire width direction of central block 11.That is, middle section
CA is, from central block center BC to the both sides on tire width direction, is respectively the width W of the central block 11 on tire width direction
5% scope region.
In addition, central block center BC in this case refers to, as the both sides on the tire width direction of central block 11
The position at the center on tire width direction on tire width direction between the part of most outward side.In present embodiment
Pneumatic tire in, central block center BC be located at equatorial plane CL on, positions of the central block center BC on tire width direction
It is set to the position identical position with equatorial plane CL.In addition, the width W of central block 11 is, it is wide in the tire of central block 11
Spend the distance that the both sides on direction are located on the tire width direction on tire width direction between the part of most outward side.
In addition, contact area ratio refers to, the tread surface 3 of area, the actual ground connection relative to middle section CA
Area.In the centrally located region CA of circumferential extensions 33 that central translot 31 has.In fact, when pneumatic tire 1 is grounded, filling
Some position ground connection in the tire circumference of air filled tyre 1, contact area ratio is different according to each grounded part, however, at which
In the case that position is grounded, the contact area ratio in middle section CA is all more than 30% and in less than 70% scope.Separately
Outside, the contact area ratio in middle section CA is preferably more than 40% and in less than 60% scope.
In addition, central block 11 is formed as, the width W on tire width direction tyre surface spreading width TW more than 20% and
In less than 40% scope.In this case tyre surface spreading width TW refers to, pneumatic tire 1 is assembled in into standard rim and to mark
Quasi- internal pressure air is filled in pneumatic tire 1 and during the no-load condition without imposed load, the expanded view of fetus face 2
In tire width direction two ends air line distance.
In addition, standard rim refers to, " Design Rim (design wheels as defined in " applying wheel rim " as defined in JATMA, TRA
Rim) " or ETRTO as defined in " Measuring Rim (measurement wheel rim) ".In addition, standard internal pressure refers to, as defined in JATMA
" TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES as defined in " highest air pressure ", TRA
" INFLATION as defined in the maximum or ETRTO of (tire load limit under different cold inflation pressures) "
PRESSURES (the blowing pressure) ".In addition, the width W on the tire width direction of central block 11 is preferably in tyre surface spreading width TW
More than 25% and less than 35% scope in.
In addition, central block 11 is formed as, the ratio of the width W on length L and tire width direction in tire circumference exists
In the range of 0.9≤(L/W)≤1.1.That is, central block 11 is formed as, and the length L in tire circumference is relative to tire width direction
On width W be more than 0.9 times and less than 1.1 times of shape.In this case the length L of central block 11 is, in central block 11
In tire circumference farthest away from part between tire circumference on distance.
In addition, the area of central block 11 is bigger than the area of intermediate mass 12 and shoulder block 13.In other words, intermediate mass 12 and tire shoulder
Block 13 is smaller than the area of central block 11, for example, shoulder block 13 is formed as, area central block 11 area more than 40% and 60%
In following scope.In addition, the area of shoulder block 13 is preferably more than 45% and less than 55% relative to the area of central block 11.
Central block 11 is formed as, and maximums of the width W on tire width direction on the tire width direction of belt 7 is wide
Degree is in maximum belt beam width BW more than 25% and less than 45% scope.Maximum belt beam width BW described herein is,
In each end for the multiple tire width direction both sides with beam 71,72,73,74 for constituting belt 7, on tire width direction
Position is located at the distance on the tire width direction between the end of most outward side.In addition, the tire width direction of central block 11
On width W relative to maximum belt beam width BW preferably more than 30% and in less than 40% scope.
The C portions that Fig. 5 is Fig. 2 scheme in detail.In addition, middle translot 35 and tire shoulder translot 36 both relative to tire width direction to
Tire peripheral, oblique.In detail, middle translot 35 is formed as, relative to tire width direction to the circumferential angle of inclination of tire
More than 0 ° and in less than 15 ° of scope.In other words, middle translot 35 is formed as, circumferential relative to tire to tyre width side
To tilt angle alpha 1 more than 75 ° and in less than 105 ° of scope, i.e. middle translot 35 is formed as, circumferential relative to tire
To the tilt angle alpha 1 of tire width direction in the range of 90 ° ± 15 °.In addition, middle translot 35 is relative to tire circumference
Tilt angle alpha 1 is preferably in the range of 90 ° ± 10 °.
In addition, tire shoulder translot 36 is and the middle phase of translot 35 to the circumferential incline direction of tire relative to tire width direction
For tire width direction to the circumferential incline direction identical direction of tire.The middle translot 35 and tire shoulder translot 36 are formed
For, middle translot 35 relative to the circumferential tilt angle alpha 1 to tire width direction of tire with tire shoulder translot 36 relative to wheel
The relation of the circumferential tilt angle alpha 2 to tire width direction of tire 0 °≤| α 2- α 1 | in the range of≤10 °.
In addition, being formed with the central indentation portion 46 being connected with external circumferential groove 25 in intermediate mass 12, formed in shoulder block 13
There is the tire shoulder notch part 47 being connected with external circumferential groove 25.Wherein, central indentation portion 46 be arranged at in external circumferential groove 25
On the extended line for being connected with the tire shoulder translot 36 of the opposite side of the side in central indentation portion 46 connection, one end and external circumferential groove 25
Connection, the other end is terminated and formed in intermediate mass 12.The central indentation portion 46 is formed as, on the bearing of trend of tire shoulder translot 36
Length ML in more than the 150% of groove width W2 and less than 300% scope of outside circumferential slot 25.
In addition, tire shoulder notch part 47 is arranged at the phase with the side for being connected with tire shoulder notch part 47 in external circumferential groove 25
Toss about connection middle translot 35 extended line on, one end is connected with external circumferential groove 25, and the other end is terminated in the shoulder block 13
And formed.The tire shoulder notch part 47 is formed as, grooves of the length SL on the bearing of trend of middle translot 35 in outside circumferential slot 25
More than the 100% of wide W2 and less than 300% scope in.
The purposes of the pneumatic tire 1 of the present embodiment constituted as described is heavy duty pneumatic vehicle tire.Should
When pneumatic tire 1 is installed on vehicle, the pneumatic tire is assembled in wheel rim (rim wheel) and installed with the state inflated
In vehicle.It is assembled in the vehicle large-scale such as being installed on truck, car (bus) of pneumatic tire 1 of the state of wheel rim and makes
With.
When the vehicle for being mounted with pneumatic tire 1 is travelled, underlying tread surface 3 in one side tread surface 3 with
Road surface is contacted, and the pneumatic tire 1 rotates on one side.Vehicle by the frictional force between tread surface 3 and road surface, by driving force and/
Or brake force passes to road surface or produces cornering force to travel.Therefore, the contact area in the ground area of pneumatic tire 1
It is the critically important key element of control stability when being travelled to vehicle.On the other hand, when snow road is travelled, mostly using circumferential
The snow post shearing force and/or edge effect of groove 20 and/or translot 30 is travelled, therefore the groove area in ground area is also important
Key element.
In addition, in the large-scale vehicle such as truck, car, because of the loading condition of goods, the gross weight of vehicle changes very
Greatly, accompany with this, the load for acting on pneumatic tire 1 also changes very big.It is very big in the load change for acting on pneumatic tire 1
In the case of, the change in shape of the ground area of pneumatic tire 1, and as load becomes big and ground area becomes big.That is, with work
Load for pneumatic tire 1 becomes big, and the ground area of pneumatic tire 1 becomes big on tire width direction and tire circumference.
But, the immediate vicinity on the tire width direction of tread surface 3, i.e. the equatorial plane CL in tread surface 3
Nearby independently from the size it is grounded with acting on the load of pneumatic tire 1 when vehicle is travelled.The pneumatic tire of present embodiment
1, inner circumferential groove 21 is equipped in equatorial plane CL both sides, and central block 11 is located on equatorial plane CL, thus
It can ensure that the contact area near equatorial plane CL.Thereby, it is possible to the load with acting on pneumatic tire 1 independently from the size
Ensure the control stability in dry road traveling.
In addition, central translot 31 is bent in multiple positions, thus there is circumferential extensions 33 on equatorial plane CL, because
This can ensure that the snow post shearing force and/or edge effect when snow road is travelled near equatorial plane CL.Moreover, in
Translot 31 is entreated, kink recess 40 is connected with the position of the bad angle side of kink 32, therefore, it is possible to improve as easy accumulated snow
Part kink 32 near row snow property.Thereby, it is possible to continuing independently from the size for the load with acting on pneumatic tire 1
Ensure the resistance between ground plane and the snowfield surface when snow road is travelled.In addition, being formed with circumference in central translot 31
Extension 33, therefore, it is possible to increase the marginal element relative to tire width direction near equatorial plane CL.Thereby, it is possible to
The pneumatic tire 1 for reducing skidding during for accelerating slides laterally, in addition, it is possible to increase the manipulation when snow road is travelled
Stability.
Moreover, in tread surface 3, contact area ratio in middle section CA is more than 30% and less than 70%, therefore
The contact area in dry road traveling can be ensured independently from the size with acting on the load of pneumatic tire 1, and
Resistance between the snowfield surface being able to ensure that when snow road is travelled and ground plane.That is, the ground connection in middle section CA
Area ratio is less than in the case of 30%, and the contact area in the case that load is small is small, therefore, it is difficult to ensure control stability,
In the case that contact area ratio in middle section CA is more than 70%, the groove area in the case that load is small is small, therefore, it is difficult to
Ensure the resistance between ground plane and snowfield surface.On the other hand, the pneumatic tire 1 of present embodiment is formed as, middle section
Contact area ratio in CA can either ensure to act on pneumatic tire 1 more than 30% and in less than 70% scope
Load it is small in the case of contact area, the resistance between ground plane and snowfield surface is able to ensure that again.As a result, can be with
The loading condition of goods is independently, i.e. independently improve dry ground performance and snowfield performance simultaneously with empty wagons and/or entrucking, especially
It is, it is possible to increase dry ground performance and snowfield performance during empty wagons.
In addition, in the centrally located region CA of circumferential extensions 33 of central translot 31, therefore, it is possible to ensure be provided with position
Groove area in the middle section CA in the case of the central block 11 on equatorial plane CL.Thereby, it is possible to ensure by
The ground plane during empty wagons in the case of dry ground performance when central block 11 ensures that empty wagons is arranged on equatorial plane CL
With the resistance between snowfield surface.As a result, dry ground performance and snowfield performance further can be improved positively simultaneously.
In addition, kink recess 40 is formed by chamfering, therefore, it is possible to horizontal in the center of the easy step-down of pattern block rigidity
The part of the bad angle side of the kink 32 of groove 31 sets kink recess 40 with will not making the rigidity reduction of central block 11.Thus,
It can suppress in order to which the row of raising avenges property and sets the reduction of the dry ground performance in the case of kink recess 40, can be further true
Improve dry ground performance and snowfield performance simultaneously on the spot.
In addition, kink recess 40 is formed as, the part being connected with the circumferential extensions 33 of central translot 31 and and width
The part that direction extension 34 is connected is equal length, therefore, it is possible to make the rigidity of central block 11 because setting kink recessed
Portion 40 and reduce ground and kink recess 40 be set.Thereby, it is possible to suppress to set kink recess 40 for the row's of raising snow property
In the case of dry ground performance reduction, dry ground performance and snowfield performance are further positively improved simultaneously.
In addition, kink recess 40 is formed as, the depth away from tread surface 3 central translot 31 groove depth more than 10%
And in less than 50% scope, therefore, it is possible to further positively take into account dry ground performance and snowfield performance.That is, in kink recess
40 depth is less than in the case of the 10% of the groove depth of central translot 31, and the depth of kink recess 40 is excessively shallow, with central translot
31 groove depth it is poor excessive, it is therefore possible to be difficult to the snow for entering central translot 31 being effectively discharged out.In addition, recessed in kink
The depth in portion 40 exceedes in the case of the 50% of the groove depth of central translot 31, the vicinity of the kink recess 40 in central block 11
Rigidity reduction, it is possible to be difficult to ensure that dry ground performance.On the other hand, by the depth-set of kink recess 40 in central translot
More than the 10% of 31 groove depth and less than 50% scope in the case of, will not can make central block 11 rigidity reduction ground really
Protect row's snow property in kink recess 40.As a result, dry ground performance and snowfield performance further can be improved positively simultaneously.
In addition, the central gap portion 45 being connected with the kink 32 of central translot 31 is formed with central block 11, thus it is logical
Cross central gap portion 45 and can also ensure that snow post shearing force and/or edge effect.Thereby, it is possible to further positively improve in
The resistance between ground plane and the snowfield surface near the CA of region is entreated, and further positively improves snowfield performance.
In addition, central gap portion 45 is formed as, along the formation direction of the width extension 34 of central translot 31
The length EL in direction is in more than the 10% of width W and less than 20% scope of central block 11, therefore, it is possible to substantially ensure that
Help the contact area of dry ground earth-grasping force, and improve the hauling ability on snowfield.That is, in the length EL in central gap portion 45
Less than central block 11 width W 10% in the case of, in the snow post shearing force in central gap portion 45 and/or edge effect less
Height, therefore, it is difficult to effectively improve the resistance between ground plane and snowfield surface.In addition, the length EL in central gap portion 45 surpasses
Cross central block 11 width W 20% in the case of, the contact area of central block 11 is possible to become too small.On the other hand, exist
The length EL in central gap portion 45 is set in the situation in more than the 10% of width W and less than 20% scope of central block 11
Under, set and can expect to avenge post shearing force and/or edge effect with will not can excessively reducing the contact area of central block 11
Central gap portion 45.As a result, dry ground performance and snowfield performance further can be improved positively simultaneously.
In addition, on kink recess 40 and central gap portion 45, being connected to the kink recess of common kink 32
The 40 aperture area A1 and aperture area A2 in central gap portion 45 relation is 3≤(A2/A1)≤6, therefore, it is possible to make center
The rigid uniform of block 11.That is, kink recess 40 and central gap portion 45 are disposed in the central translot 31 on tire width direction
Circumferential extensions 33 both sides, therefore (A2/A1) be less than 3 or (A2/A1) more than 6 in the case of, in central block 11
The poor rigidity of the both sides of circumferential extensions 33 becomes too much, it is possible to cause partial wear.On the other hand, by kink recess 40
The aperture area A2 relation in aperture area A1 and central gap portion 45 be set in situation in the range of 3≤(A2/A1)≤6
Under, the poor rigidity of the both sides of circumferential extensions 33 can be reduced.As a result, can suppress to be provided with kink recess 40 and center
The generation of partial wear in the case of notch part 45.
In addition, being formed with central indentation portion 46 in intermediate mass 12, tire shoulder notch part 47 is formed with shoulder block 13, thus it is logical
Central indentation portion 46 and the snow post shearing force of tire shoulder notch part 47 and/or edge effect are crossed, the wheel in ground area can be increased
Resistance between near two ends on tire width, ground plane and snowfield surface.As a result, snowfield acceleration can be improved
Can, it further can positively improve snowfield performance.
In addition, middle translot 35 is formed as, relative to the circumferential tilt angle alpha 1 to tire width direction of tire 75 ° with
It is near the two ends on the tire width direction of ground area, relative therefore, it is possible to improve in upper and less than 105 ° of scope
In the circumferential marginal element of tire.As a result, snowfield performance further can be improved positively.
In addition, on middle translot 35 and tire shoulder translot 36, tilt angle alpha 1 and the tire shoulder translot 36 of middle translot 35
The relation of tilt angle alpha 20 °≤| α 2- α 1 | in the range of≤10 °, therefore, it is possible to ensure row snow property, in addition, can be effectively
Improve in middle translot 35 and/or the snow post shearing force of tire shoulder translot 36 and/or edge effect.As a result, can be further true
Snowfield performance is improved on the spot.
In addition, inner circumferential groove 21 and external circumferential groove 25 are formed as, the groove width W1 and external circumferential of inner circumferential groove 21
The groove width W2 of groove 25 relation meets the relation of 0.5≤(W2/W1)≤0.9, therefore, it is possible to ensure the position by middle section CA
Groove area, can fully the row of performance snow property.As a result, dry ground performance can be improved, and snowfield when improving empty wagons
Energy.
In addition, central block 11 is formed as, the width W on tire width direction for tyre surface spreading width TW more than 20% and
Less than 40%, therefore, it is possible to ensure middle section CA groove area, and obtain the area of larger central block 11.As a result,
Snowfield performance is able to ensure that, and improves dry ground performance.
In addition, central block 11 is formed as, the ratio of the width W on length L and tire width direction in tire circumference exists
In the range of 0.9≤(L/W)≤1.1, therefore, it is possible to ensure the rigidity of central block 11, so as to ensure control stability.That is,
It is firm in the rigidity and/or tire width direction in the tire circumference of central block 11 when (L/W) is less than 0.9 or more than 1.1
Property is possible to become too low, and central block 11 is easily collapsed, therefore the effective grounding area of central block 11 is likely to decrease.With this phase
It is right, by the ratio set of the width W on the length L in the tire circumference of central block 11 and tire width direction in 0.9≤(L/W)
In the range of≤1.1, the rigidity thus, it is possible to ensure central block 11, therefore, it is possible to suppress the effective grounding area drop of central block 11
It is low.As a result, dry ground performance and snowfield performance further can be improved positively simultaneously.
In addition, the area of shoulder block 13 is in more than the 40% of area and less than 60% scope of central block 11, therefore
The groove area of the frequency being grounded in the empty wagons shoulder zone fewer than middle section CA is able to ensure that, so as to ensure that snow post is cut
Shear force and/or edge effect.In addition, by making the area of central block 11 bigger than the area of shoulder block 13, in ensuring
Entreat the rigidity of block 11.Thereby, it is possible to suppress the effective grounding area of central block 11 because the rigidity of central block 11 is reduced and is reduced.Its
As a result, it is possible to further positively improve dry ground performance and snowfield performance simultaneously.
In addition, central block 11 is formed as, the width W on tire width direction maximum belt beam width BW more than 25% and
In less than 45% scope, therefore, it is possible to seek on tire width direction, in the ground pressure centered on middle section CA
The optimization of the width of the belt 7 in high region.Thereby, it is possible to seek the rigid of the fetus face 2 on tire width direction
Homogenization.As a result, control stability can independently be improved with the transport condition of vehicle.
In addition, steel carcass material is used in carcass 6, therefore, it is possible to ensure the rigidity of the entirety of pneumatic tire 1.As a result, can
Control stability is independently improved with the transport condition of vehicle.
In addition, the pneumatic tire 1 of present embodiment is used as heavy duty pneumatic vehicle tire, thus even in because of goods
The loading condition of thing and act on the load change of pneumatic tire 1 it is very big in the case of, also can be with load independently from the size
Dry ground performance and snowfield performance are improved simultaneously.As a result, can improve by the pneumatic tire 1 of present embodiment be installed on truck,
The driving performance of vehicle in the case of the large-scale vehicle such as car.
(embodiment)
Fig. 6 A~Fig. 6 D are the charts of the result for the performance test for representing pneumatic tire.Hereinafter, on above-mentioned inflated wheel
Tire 1, illustrates the evaluation test of performance carried out to the pneumatic tire 1 of past case and the pneumatic tire 1 of the present invention.Performance evaluation is tried
Test and carry out doing the experiment of ground acceleration on the acceleration on dry road surface and on the acceleration on snowfield
That is the experiment of snowfield acceleration.
These benchmark tests pass through progress of such as getting off：275/ will be nominally in tire specified in JATMA
80R22.5 specifications, load factor are assembled in the wheel rim in standard rim specified in JATMA for 151J pneumatic tire 1, by sky
Atmospheric pressure is adjusted in maximum air pressure specified in JATMA, and the test vehicle that the pneumatic tire 1 is installed on into 2-D (is led
Draw car headstock (tractor head)) carry out test traveling.
On the evaluation method of each pilot project, pass through the acceleration of the speed interval to 5~40km/h in dry pavement
Degree is measured, and makes average acceleration indexation, to evaluate dry ground acceleration.The bigger expression of numerical value accelerates dryly
Performance is better.It is measured by the acceleration of the speed interval to 5~20km/h on the road surface of snow consolidation (compacting), and
Make average acceleration indexation to evaluate snowfield acceleration.Numerical value is bigger to represent that snowfield acceleration is better.Separately
Outside, in the case where the respective index of dry ground acceleration and snowfield acceleration is more than 105, with effective performance.
Pneumatic tire 1 to the past case 1~3 of one as conventional pneumatic tire 1 and the inflation as the present invention
This 24 kinds of pneumatic tires 1 of the embodiment 1~21 of tire 1 carry out evaluation test.These pneumatic tires 1 are formed as, central translot 31
Whether bend, whether circumferential slot 20 has amplitude, the contact area ratio in middle section CA on tire width direction and has
It is different without kink recess 40.Wherein, the pneumatic tire 1 of past case 1~3 is not provided with kink recess 40, and in
Centre translot 31 do not bend or circumferential slot 20 without in amplitude or middle section CA contact area compare not 30% with
In upper and less than 70% scope.
On the other hand, the embodiment 1~21 of one on the pneumatic tire 1 as the present invention, central translot 31 is bent,
Circumferential slot 20 has amplitude, and the contact area in middle section CA has than more than 30% and in less than 70% scope
There is kink recess 40.Moreover, the pneumatic tire 1 on embodiment 1~21, the presence or absence of central gap portion 45, central gap portion
The ratio of 45 length EL, the aperture area A2 in central gap portion 45 relative to the aperture area A1 of kink recess 40, centre
The presence or absence of notch part 46 and tire shoulder notch part 47, the tilt angle alpha 1 of middle translot 35 and tire shoulder translot 36, α 2, inner circumferential groove
21 with the ratio of the relativeness of groove width W1, W2, the width W of central block 11 relative to tyre surface spreading width TW of external circumferential groove 25
Example, the ratio of area of the area relative to central block 11 of the aspect ratio of central block 11, shoulder block 13 and the width of central block 11
Spend W different relative to maximum belt beam width BW ratio.
The result of evaluation test is carried out as shown in Fig. 6 A~Fig. 6 D using these pneumatic tires 1, it is known that embodiment 1~21
Pneumatic tire 1 is relative to past case 1~3, while improving dry ground acceleration and snowfield acceleration.That is, embodiment 1~21
Pneumatic tire 1 can improve dry ground performance and snowfield performance simultaneously.
Claims (15)
1. a kind of pneumatic tire, it is characterised in that possess：
A pair of inside circumferential slot, it clips equatorial plane and is disposed in two of the equatorial plane on tire width direction
Side, and upwardly extended in tire week；
A pair of outside circumferential slot, it is disposed in the respective outside of inner circumferential groove described in a pair on tire width direction, and
Upwardly extended in tire week；
Multiple central translots, its two ends are connected with inner circumferential groove described in a pair, and are thus had in the bending of multiple positions
The circumferentially upper circumferentially extending portion of tire and the width extension extended on tire width direction；
Central block, it is the land portion marked off by the central translot and the inner circumferential groove；And
Kink recess, it is by the position of the bad angle side of the kink of the central translot in the central block from tyre surface
Surface indentation and formed, and be connected with the circumferential extensions and the width extension,
Contact area ratio in middle section is more than 30% and less than 70%, and the middle section is with tire width direction
On the central block center centered on, 10% region of width on the tire width direction of the central block.
2. pneumatic tire according to claim 1,
The circumferential extensions is located in the middle section.
3. pneumatic tire according to claim 1 or 2,
The kink recess is formed by chamfering.
4. according to pneumatic tire according to any one of claims 1 to 3,
The kink recess is formed as, and the part that is connected with the circumferential extensions and is connected with the width extension
Part be equal length.
5. according to pneumatic tire according to any one of claims 1 to 4,
The kink recess is formed as, the depth away from the tread surface the central translot groove depth more than 10%
And in less than 50% scope.
6. according to pneumatic tire according to any one of claims 1 to 5,
Central gap portion is formed with the central block, the central gap portion is arranged at the extended line of the width extension
On, and one end is connected with the kink, and the other end is terminated in the central block.
7. pneumatic tire according to claim 6,
The central gap portion is formed as, and the length along the direction in the formation direction of the width extension is wide in tire
In more than the 10% of width and less than 20% scope for spending the central block on direction.
8. the pneumatic tire according to claim 6 or 7,
On the kink recess and the central gap portion, the kink recess of the common kink is connected to
The aperture area A2 relation in aperture area A1 and the central gap portion be 3≤(A2/A1)≤6.
9. according to pneumatic tire according to any one of claims 1 to 8, possess：
Multiple middle translots, its two ends are connected with the adjacent inner circumferential groove and the external circumferential groove；
Multiple tire shoulder translots, it is disposed in the outside on the tire width direction of the external circumferential groove, one end and the outside
Circumferential slot is connected；
Intermediate mass, it is the land portion marked off by the inner circumferential groove, the external circumferential groove and the middle translot；With
And
Shoulder block, it is the land portion marked off by the external circumferential groove and the tire shoulder translot,
Central indentation portion is formed with the intermediate mass, the central indentation portion is arranged on the extended line of the tire shoulder translot, and
And one end is connected with the external circumferential groove, the other end is terminated in intermediate mass,
Tire shoulder notch part is formed with the shoulder block, the tire shoulder notch part is arranged on the extended line of the middle translot, and
And one end is connected with the external circumferential groove, the other end is terminated in shoulder block.
10. pneumatic tire according to claim 9,
The middle translot is formed as, it is circumferential relative to tire to the angle of inclination of tire width direction more than 75 ° and 105 °
In following scope.
11. the pneumatic tire according to claim 9 or 10,
On the middle translot and the tire shoulder translot,
The tilt angle alpha 1 and the phase of the tire shoulder translot to tire width direction circumferential relative to tire of the middle translot
For the circumferential tilt angle alpha 2 to tire width direction of tire relation for 0 °≤| α 2- α 1 |≤10 °.
12. the pneumatic tire according to any one of claim 1~11,
On the inner circumferential groove and the external circumferential groove, the groove width W1 of the inner circumferential groove and the external circumferential groove
Groove width W2 relation be 0.5≤(W2/W1)≤0.9.
13. the pneumatic tire according to any one of claim 1~12,
Width on the tire width direction of the central block is more than the 20% and less than 40% of tyre surface spreading width.
14. the pneumatic tire according to any one of claim 1~13,
The ratio of the width W on length L and tire width direction in the tire circumference of the central block be 0.9≤(L/W)≤
1.1。
15. the pneumatic tire according to any one of claim 1~14,
The purposes of the pneumatic tire is heavy duty pneumatic vehicle tire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-005757 | 2016-01-15 | ||
| JP2016005757A JP6724373B2 (en) | 2016-01-15 | 2016-01-15 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106976362A true CN106976362A (en) | 2017-07-25 |
| CN106976362B CN106976362B (en) | 2019-06-14 |
Family
ID=59340254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710023977.9A Expired - Fee Related CN106976362B (en) | 2016-01-15 | 2017-01-13 | Pneumatic tire |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6724373B2 (en) |
| CN (1) | CN106976362B (en) |
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| CN111615459A (en) * | 2018-01-23 | 2020-09-01 | 横滨橡胶株式会社 | Pneumatic tire |
| CN111989229A (en) * | 2018-04-17 | 2020-11-24 | 横滨橡胶株式会社 | Pneumatic tire |
| CN112339506A (en) * | 2019-08-07 | 2021-02-09 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN112339505A (en) * | 2019-08-07 | 2021-02-09 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN115103777A (en) * | 2020-03-04 | 2022-09-23 | 横滨橡胶株式会社 | Tyre for vehicle wheels |
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| JP6898176B2 (en) * | 2017-08-17 | 2021-07-07 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Pneumatic tires |
| JP7355985B2 (en) * | 2018-05-01 | 2023-10-04 | 横浜ゴム株式会社 | pneumatic tires |
| JP7059782B2 (en) * | 2018-05-01 | 2022-04-26 | 横浜ゴム株式会社 | Pneumatic tires |
| JP6631730B1 (en) * | 2019-02-20 | 2020-01-15 | 横浜ゴム株式会社 | Pneumatic tire |
| JP7399679B2 (en) * | 2019-10-29 | 2023-12-18 | 株式会社ブリヂストン | pneumatic tires |
| CN111114206B (en) * | 2020-01-17 | 2022-05-10 | 安徽佳通乘用子午线轮胎有限公司 | Winter tire with crescent pattern blocks |
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| JP5440590B2 (en) * | 2011-11-14 | 2014-03-12 | 横浜ゴム株式会社 | Pneumatic tire |
| JP5938030B2 (en) * | 2013-12-27 | 2016-06-22 | 住友ゴム工業株式会社 | Pneumatic tire |
| DE112015002093T5 (en) * | 2014-05-01 | 2017-02-09 | The Yokohama Rubber Co., Ltd. | tire |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111615459A (en) * | 2018-01-23 | 2020-09-01 | 横滨橡胶株式会社 | Pneumatic tire |
| US11718130B2 (en) | 2018-01-23 | 2023-08-08 | The Yokohama Rubber Co., Ltd. | Pneumatic tire |
| CN111989229A (en) * | 2018-04-17 | 2020-11-24 | 横滨橡胶株式会社 | Pneumatic tire |
| CN111989229B (en) * | 2018-04-17 | 2021-11-05 | 横滨橡胶株式会社 | Pneumatic tire |
| CN112339506A (en) * | 2019-08-07 | 2021-02-09 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN112339505A (en) * | 2019-08-07 | 2021-02-09 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN112339505B (en) * | 2019-08-07 | 2022-11-08 | 通伊欧轮胎株式会社 | Pneumatic tire |
| CN115103777A (en) * | 2020-03-04 | 2022-09-23 | 横滨橡胶株式会社 | Tyre for vehicle wheels |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106976362B (en) | 2019-06-14 |
| JP2017124773A (en) | 2017-07-20 |
| JP6724373B2 (en) | 2020-07-15 |
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