CN105818614B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN105818614B CN105818614B CN201610008628.5A CN201610008628A CN105818614B CN 105818614 B CN105818614 B CN 105818614B CN 201610008628 A CN201610008628 A CN 201610008628A CN 105818614 B CN105818614 B CN 105818614B
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- Prior art keywords
- rake
- tire
- outside
- land portion
- ditch
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/0304—Asymmetric 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
- B60C11/0302—Tread patterns directional pattern, i.e. with main rolling direction
-
- 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
- B60C11/1204—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes with special shape 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
- B60C11/1259—Depth of the sipe
- B60C11/1263—Depth of the sipe different within the same 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- 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
- B60C2011/0372—Lateral grooves, i.e. having an angle of 45 to 90 degees to the equatorial plane with particular inclination angles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/12—Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
- B60C11/1259—Depth of the sipe
- B60C2011/1268—Depth of the sipe being different from sipe to sipe
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
The present invention provides a kind of pneumatic tire of inhibit land portion partial wear with capable of not damaging drainage.In pneumatic tire, fetus face (2) is provided with tap drain (3) and land portion (4).Land portion (4) are provided with perforation unit (10).Penetrating through unit (10) is in the V shape including the first rake (11) and the second rake (12).First rake (11) is made of the first cutter groove (16) on earth from tread surface.Second rake (12) includes the outside ditch portion (18) for having the ditch width bigger than cutter groove from tread surface (2s)；And the second cutter groove (19) extended from the bottom of outside ditch portion (18) to tire radial direction inner side.Second cutter groove (19) and the first cutter groove (16) are continuous.
Description
Technical field
The present invention relates to the pneumatic tires with high wet road performance and resistance to partial wear performance.
Background technique
For example, being provided with the perforation list along the crosscutting land portion of tire axial in the pneumatic tire of following patent documents 1
Member.The perforation unit when overlook view with the cutter groove that V shape extends by being constituted.
Since perforation unit is made of the small cutter groove of width, so effect has the case where earth contact pressure, cross force in land portion
Under, the cutter groove wall opposite each other for penetrating through unit is snugly into each other.Apparent rigidity is improved in above-mentioned land portion as a result, and has
The behavior as along tire circumferentially continuous rib.
On the other hand, above-mentioned land portion in ground connection as with behavior as rib, there are the reduction of drainage,
Effect have the tendency that being easy to produce when big cross force the circumferential edge in land portion float or partial wear (edge abrasion).
Patent document 1: Japanese Unexamined Patent Publication 2014-210499 bulletin
Summary of the invention
The present invention is proposed in view of above actual state, and main purpose is to provide a kind of single to improve perforation
Member shape be it is basic, inhibit while drainage can not be damaged the pneumatic tire of the partial wear in land portion.
The present invention provides a kind of pneumatic tire, and the multiple masters extended circumferentially continuously along tire are provided in fetus face
Ditch and the land portion divided by above-mentioned tap drain, which is characterized in that above-mentioned land portion is provided with passing through for crosscutting above-mentioned land portion
Logical unit, above-mentioned perforation unit are in the V shape including the first rake and the second rake in plan view, and above-mentioned first
Rake is tilted relative to tire axial, and above-mentioned second rake is configured at more leans on tire axially external than above-mentioned first rake
Position and oppositely tilted with above-mentioned first rake, above-mentioned first rake is from tread surface on earth by the first cutter groove
It constitutes, above-mentioned second rake includes the outside ditch portion for having the ditch width bigger than above-mentioned cutter groove from above-mentioned tread surface；With
And the second cutter groove extended from the bottom of above-mentioned outside ditch portion to tire radial direction inner side, above-mentioned second cutter groove and above-mentioned first cutter groove connect
It is continuous.
In pneumatic tire of the invention, ditch wall surface and above-mentioned second cutter groove of a side of preferably above-mentioned outside ditch portion
The cutter groove wall surface of one side is continuous.
In pneumatic tire of the invention, the ditch wall surface of another party of preferably above-mentioned outside ditch portion is with outside to tire diameter
Side keeps ditch width widened towards inclination.
In pneumatic tire of the invention, preferably above-mentioned second rake has the tire smaller than above-mentioned first rake
Axial length.
In pneumatic tire of the invention, the angle, θ 2 relative to tire axial of preferably above-mentioned second rake is than upper
The angle, θ 1 relative to tire axial for stating the first rake is small.
In pneumatic tire of the invention, the depth of preferably above-mentioned outside ditch portion is the depth of above-mentioned second rake
0.15~0.35 times.
In pneumatic tire of the invention, the inner end of the tire axial of preferably above-mentioned outside ditch portion is inclined with above-mentioned first
The distance of tire axial between inclined portion and the vertex of above-mentioned second rake intersection is in 3.0mm or less.
Pneumatic tire of the invention is preferably that the pneumatic tire is designated the installation direction of vehicle, above-mentioned land portion packet
A pair intermediate land portion for the two sides for being set to tire equator is included, above-mentioned a pair of intermediate land portion includes: when being installed on vehicle
The land portion among the inside of vehicle interior side；And when being installed on vehicle among the outside of vehicle outside land portion,
Above-mentioned perforation unit is set to land portion among above-mentioned outside.
In pneumatic tire of the invention, land portion is in the two sides of tire axial by above-mentioned master among preferably above-mentioned outside
Ditch divides, the land portion among above-mentioned outside, is provided on the inside of from the above-mentioned tap drain on the outside of tire axial to tire axial and extends
And the non-through unit of terminal, above-mentioned non-through unit and above-mentioned perforation unit are formed among the above-mentioned inside in the portion of land along taking turns
Tire is circumferentially alternately arranged.
In pneumatic tire of the invention, it is provided with the perforation unit in crosscutting land portion.Penetrate through unit in plan view
In including relative to inclined first rake of tire axial and being configured at and more leaning on tire axially external than the first rake
Position and V shape with the first rake oppositely inclined second rake.
First rake is made of the first cutter groove on earth from tread surface.Second rake is included from tread surface
Outside ditch portion with the ditch width bigger than cutter groove；And the second knife extended from the bottom of outside ditch portion to tire radial direction inner side
Slot.Also, the second cutter groove and the first cutter groove are continuous.
Such perforation unit makes cutter groove wall surface opposite each other in the first cutter groove and the second cutter groove in ground connection respectively
It engages snugly into each otherly.Therefore, the apparent rigidity for improving land portion, to obtain excellent control stability.In addition, i.e.
Make in the case where the first cutter groove and the second cutter groove are closed, the outside ditch portion of the second rake also by the water under the portion of land to
Tap drain side discharge, to provide excellent wet road performance.
Also, in the case that in above-mentioned land portion, effect has cross force, in existing perforation unit, because of the height in land portion
Apparent rigidity, such as float there are a part of ground plane from road surface and the worry that causes to cannot get enough road holdings.But
It is that pneumatic tire of the invention is provided with the width outside ditch portion wider than cutter groove in the second rake.Such outside ditch portion is inhaled
Receive the deformation of ground plane and it inhibited to float, thus control stability can either be improved again can effectively inhibit edge abrasion it
The partial wear of class.
Detailed description of the invention
Fig. 1 is the expanded view of the fetus face of the pneumatic tire of one embodiment of the present invention.
Fig. 2 is the enlarged drawing in land portion among the outside of Fig. 1.
Fig. 3 (a) is the line A-A cross-sectional view of the first rake of Fig. 2, and Fig. 3 (b) is the line B-B of the second rake of Fig. 2
Cross-sectional view.
Fig. 4 is the enlarged drawing in land portion among the inside of Fig. 1.
Fig. 5 is the enlarged drawing in the external shoulder land portion of Fig. 1.
Fig. 6 is the enlarged drawing in the inside tire-shoulder land portion of Fig. 1.
Fig. 7 is the enlarged drawing of the fetus face of the pneumatic tire of comparative example.
The explanation of appended drawing reference
2... fetus face；2s... tread surface；3... tap drain；4... land portion；10... unit is penetrated through；11...
One rake；12... the second rake；16... the first cutter groove；18... outside ditch portion；19... the second cutter groove.
Specific embodiment
Hereinafter, being illustrated based on attached drawing to one embodiment of the present invention.
Fig. 1 is the pneumatic tire of present embodiment (hereinafter, sometimes referred to simply as " tire ".) 1 fetus face 2 expanded view.
The tire that the pneumatic tire 1 of present embodiment is for example suitable as car come using.
The fetus face 2 of present embodiment is for example with specifying the tread contour of the installation direction to vehicle.This embodiment party
The fetus face 2 of formula is designated vehicle outside A and vehicle interior side B when vehicle is installed respectively.It is for example logical to the installation direction of vehicle
Cross text, label and to be shown in sidewall (not shown.) etc..
As shown in Figure 1, the fetus face 2 in tire 1 is provided with the multiple tap drains 3 extended along tire circumferentially continuously；And
The land portion 4 divided by tap drain 3.
Tap drain 3 for example, be set to the shoulder main groove 5 of the side tyre surface ground terminal Te；And it is set to the wheel of shoulder main groove 5
The central main groove 6 of tire axially inner side.
" tyre surface ground terminal Te " is to being assembled in regular wheel rim (not shown) and be filled with regular internal pressure and non-loaded
Tire 1 under normal state, when loading regular load and it being made to be grounded on plane with 0 ° of camber angle outside tire axial
The earthing position of side.
" regular wheel rim " is to determine to be somebody's turn to do according to each tire under the schematism including specification based on tire
The wheel rim of specification, such as be " standard rim " in the case where JATMA, it is in the case where TRA " Design Rim ",
It is in the case where ETRTO " Measuring Rim ".
" regular internal pressure " is to determine respectively under the schematism including specification based on tire according to each tire
The air pressure of specification is " highest air pressure " in the case where JATMA, is table " TIRE LOAD in the case where TRA
Maximum value documented by LIMITS AT VARIOUS COLD INFLATION PRESSURES " is in the case where ETRTO
“INFLATION PRESSURE”。
" regular load " is to determine respectively under the schematism including specification based on tire according to each tire
The load of specification is " maximum load capability " in the case where JATMA, is table " TIRE LOAD in the case where TRA
Maximum value documented by LIMITS AT VARIOUS COLD INFLATION PRESSURES " is in the case where ETRTO
“LOAD CAPACITY”。
The shoulder main groove 5 and central main groove 6 of present embodiment are for example linearly to extend.Shoulder main groove 5 and center
Tap drain 6 can also for example be serrated or corrugated extend.
Shoulder main groove 5 for example, when being installed on vehicle positioned at the external shoulder tap drain 5A of vehicle outside A；And
Positioned at the inside shoulder main groove 5B of vehicle interior side B when being installed on vehicle.
The setting of central main groove 6 is on the outside between shoulder main groove 5A and inside shoulder main groove 5B.The center of present embodiment is main
Ditch 6 is for example set as one on tire equator C.Central main groove 6 for example can also be set as one in the two sides of tire equator C
It is right.
The ditch width W1 of the shoulder main groove 5 and ditch width W2 of central main groove 6 is for example preferably tyre surface ground width TW's
3.5%~10.0%.The trench depth of the trench depth of shoulder main groove 5 and central main groove 6 is for car pneumatic tire the case where
Under, such as preferably 5.0~12.0mm.Tyre surface ground width TW be the tire 1 under above-mentioned normal state tyre surface ground terminal Te,
The distance of tire axial between Te.
Inside shoulder main groove 5B is for example with the ditch width bigger than external shoulder tap drain 5A.Drying is balancedly improved as a result,
Control stability and wet road performance on road surface.
Central main groove 6 is for example with the ditch width bigger than inside shoulder main groove 5B.As a result, when wet road when driving, be easy will
Water discharge near tire equator C, to effectively inhibit slipping phenomenon.
In fetus face 2, due to being provided with above-mentioned shoulder main groove 5 and central main groove 6, to be divided into shoulder main groove 5
Tire-shoulder land portion 8 on the outside of the tire axial in intermediate land portion 7 and shoulder main groove 5 between central main groove 6.
Intermediate land portion 7 includes: when being installed on vehicle as land portion 7A among the outside of vehicle outside A；And
As land portion 7B among the inside of vehicle interior side B when being installed on vehicle.
The enlarged drawing of the intermediate land portion 7A in outside is shown in FIG. 2.As shown in Fig. 2, intermediate land portion 7A is set on the outside
It is equipped with the perforation unit 10 in multiple crosscutting land portions.
Penetrate through unit 10 in plan view, including the first rake 11 and the second rake 12, and in all to tire
To the V shape of a side side (in Fig. 2 be upside) protrusion extend.
First rake 11 is tilted relative to tire axial.First rake 11 of present embodiment is for example from central main groove
6 roll tiltedly to a side of above-mentioned tire circumferential direction, and linearly to extend to the vertex 14 of the perforation unit 10 of V shape.
The angle, θ 1 relative to tire axial of first rake 11 is preferably 20~30 °.Such first rake 11
The frictional force based on edge can be balancedly played relative to tire circumferential direction and tire axial.
The line A-A cross-sectional view of the first rake 11 is shown in Fig. 3 (a).As shown in figure 3, the first rake 11 is from tire
Face ground plane 2s 15 is made of on earth the first cutter groove 16.In the present specification, " cutter groove " to be finger widths cut 1.5mm is below
Mouthful, it is distinguished with the ditch of draining.
For such first rake 11, when tread surface 2s effect has earth contact pressure, knife opposite each other
Trough wall surface is snugly into each other and is integrally formed, to help to improve the apparent rigidity in land portion.
As shown in Fig. 2, the second rake 12 is configured at the position more axially external by tire than the first rake 11.Second
Rake 12 is oppositely tilted with the first rake 11.Second rake 12 of present embodiment is for example from above-mentioned vertex 14 to wheel
Another party side (being downside in Fig. 2) inclination of tire circumferential direction, and linearly to extend to external shoulder tap drain 5A.
The line B-B cross-sectional view of the second rake 12 of Fig. 2 is shown in Fig. 3 (b).As shown in Fig. 3 (b), the second inclination
Portion 12 has outside ditch portion 18 and the second cutter groove 19.
Outside ditch portion 18 is open in tread surface 2s and extends to tire radial direction inner side.Outside ditch portion 18 has than cutter groove
Big ditch width.Such outside ditch portion 18 wet road when driving, water is effectively absorbed, to help to improve wet road performance.
Second cutter groove 19 extends from the bottom of outside ditch portion 18 20 to tire radial direction inner side.Also, the second cutter groove 19 and first
Cutter groove 16 is (same as below shown in such as Fig. 3 (a).) continuous.
Perforation unit 10 with the first rake 11 as described above and the second rake 12 is (as shown in Fig. 2, following
It is identical.) in ground connection, cutter groove wall surface opposite each other is nibbled snugly into each otherly in the first cutter groove 16 and the second cutter groove 19
It closes.Therefore, the apparent rigidity for improving land portion, to obtain excellent control stability.In addition, even if in the first cutter groove
16 and second cutter groove 19 be closed in the case where, the outside ditch portion 18 of the second rake 12 is also by the water under the portion of land to tap drain
Side discharge, to provide excellent wet road performance.
Also, in the case that in above-mentioned land portion, effect has cross force, in existing perforation unit, because of the height in land portion
Apparent rigidity, such as float there are a part of ground plane from road surface and the worry that causes to cannot get enough road holdings.And
And float and cause the worry of edge generation partial wear from road surface there are a part at the edge in land portion.
But pneumatic tire of the invention is provided with the width outside ditch portion 18 wider than cutter groove in the second rake 12.This
The outside ditch portion 18 of sample absorbs the deformation of ground plane and it is inhibited to float, so that can either improve control stability again can be effective
Ground inhibits the partial wear of edge abrasion etc.
The first ditch wall surface 21 of one side of outside ditch portion 18 is radial linearly to extend along tire from tread surface 2s, and
It is continuous with the cutter groove wall surface 23 of a side of the second cutter groove 19.Also, the second ditch wall surface 22 of another party of outside ditch portion 18 is to wheel
Tire radial outside is tilted with the direction for expanding ditch width.
Second ditch wall surface 22 of present embodiment is for example smoothly bent in cross section.Also, curved second furrow bank
The center of the radius of curvature in face 22 is on the outside of tire.Such second ditch wall surface 22 plays excellent drainage.
As shown in Fig. 2, the second ditch wall surface 22 of outside ditch portion 18 is arranged in plan view as more preferred mode
In perforation unit 10 14 side of vertex, be set to the side side (in Fig. 2 be upside) of above-mentioned tire circumferential direction.In the past, second inclined
The small pieces portion 28 of the triangle between circumferential edge 29 on the outside of the tire axial in inclined portion 12 and land portion is easy floating from road surface
It rises, thus in the presence of the trend for being easy to produce partial wear.In the present embodiment, since the second ditch wall surface 22 of outside ditch portion 18 is set
Thus 14 side of vertex for being placed in perforation unit 10 effectively inhibits its partial wear to inhibit floating for above-mentioned small pieces portion 28.
As shown in Fig. 3 (b), in order to balancedly improve wet road performance and resistance to partial wear performance, the depth d2 of outside ditch portion 18
Preferably 0.15 times or more of the depth d1 of the second rake 12, more preferably 0.22 times or more, and preferably 0.35 times with
Under, more preferably 0.28 times or less.
From the viewpoint of identical, width W3 of the outside ditch portion 18 on tread surface 2s is preferably 1.5mm or more, more
Preferably 1.8mm or more, and preferably 2.5mm is hereinafter, more preferably 2.0mm or less.
As shown in Fig. 2, the second rake 12 is preferably the length L2 with the tire axial smaller than the first rake 11.Tool
For body, the length L2 of the tire axial of the second rake 12 is preferably the length L1 of the tire axial of the first rake 11
0.30 times or more, more preferably 0.35 times or more, and preferably 0.45 times hereinafter, more preferably 0.40 times or less.It is such
Second rake 12 can either inhibit the edge abrasion on the outside of the tire axial in land portion, and provide excellent wet road performance.
The angle, θ 2 relative to tire axial of second rake 12 for example preferably than the first rake 11 relative to
The angle, θ 1 of tire axial is small.Specifically, above-mentioned angle, θ 2 is for example preferably 18~25 °.Such second rake 12 was both
Inhibit floating for the above-mentioned small pieces portion 28 when the effect of land portion has cross force, and plays high wet road performance.
Angle, θ 3 between first rake 11 and the second rake 12 is preferably 125 ° or more, more preferably 130 ° with
On, and preferably 140 ° hereinafter, more preferably 135 ° or less.Such perforation unit 10 had not only played high edge effect, but also
Help to inhibit the partial wear near vertex 14.
From the viewpoint of identical, the wheel on the vertex 14 of the inner end 17 and perforation unit 10 of the tire axial of outside ditch portion 18
The distance L3 of tire axial direction is preferably 3.0mm hereinafter, more preferably 1.5mm or less.
Intermediate land portion 7A on the outside, such as it is provided with multiple be connected to tap drain 3 and the formation terminal in the portion of land
Non-through unit 25.In the present embodiment, perforation unit 10 is circumferentially alternately arranged with non-through unit 25 along tire.
The non-through unit 25 of present embodiment is for example from external shoulder tap drain 5A to extending on the inside of tire axial and outside
Terminal is formed among side in land portion 7A.Such non-through unit 25 had both maintained in the tire axial of the intermediate land portion 7A in outside
The rigidity of side, and play excellent wet road performance.
Non-through unit 25 is for example formed as the V shape including third rake 26 and the 4th rake 27.
Third rake 26 is from the inner end 25i of the tire axial of non-through unit 25, to incline with the first of perforation unit 10
The identical direction of inclined portion 11 obliquely extends.The third rake 26 of present embodiment for example extends along the first rake 11.
Third rake 26 is for example (same as below shown in such as Fig. 3 (a) with the section shape with the first rake 11.)
Identical structure.That is, third rake 26 is preferably made of (illustration omitted) from tread surface cutter groove on earth.
4th rake 27 is for example configured at the position more axially external by tire than third rake 26.4th rake
27 oppositely tilt with third rake 26.As preferred mode, the 4th rake 27 of present embodiment is for example along
Two rakes 12 extend.
4th rake 27 is for example (same as below shown in such as Fig. 3 (b) with the section shape with the second rake 12.)
Identical structure.That is, the 4th rake 27 includes the outside ditch portion for having the ditch width bigger than cutter groove from tread surface；With
And the cutter groove (illustration omitted) extended from the bottom of outside ditch portion to tire radial direction inner side.Such 4th rake 27 makes land portion
Tire axial on the outside of stiffness distribution it is uniform, thus facilitate inhibit land portion partial wear.
The enlarged drawing of the intermediate land portion 7B in inside is shown in FIG. 4.Land portion 7B is provided with multiple cross among inside
Cut the second perforation unit 30 in land portion.It is set to the second perforation unit 30 of the intermediate land portion 7B in inside and is set to outside
The perforation unit 10 of intermediate land portion 7A is (as shown in Fig. 2, the case where existing below the referred to as first perforation unit 10.) vertical view see
Shape when examining is different.
Second perforation unit 30 is for example including relative to tire axial inclined central rake 31, centrally disposed inclination
The first side 32 and the second side 33 of the tire axial two sides in portion 31.
Central rake 31 is for example relative to tire axial inclination and linearly to extend.Such center rake 31 exists
Tire circumferential direction and tire axial play edge effect.
In order to further play said effect, the angle, θ 4 relative to tire axial of central rake 31 is preferably 40 °
More than, more preferably 45 ° or more, and preferably 55 ° hereinafter, more preferably 50 ° or less.
Central rake 31 is for example with section shape identical with the first rake 11.That is, central rake 31 is from tire
Face ground plane is made of (illustration omitted) cutter groove on earth.Such center rake 31 makes cutter groove wall opposite each other in ground connection
It engages snugly into each otherly in face.Therefore, the apparent rigidity for improving the intermediate land portion 7B in inside, so that it is steady to obtain excellent manipulation
It is qualitative.
First side 32 will be for example connected between central main groove 6 and central rake 31.Second side 33 is for example by inside
It is connected between shoulder main groove 5B and central rake 31.
First side 32 and the second side 33 preferably extend along tire axial respectively.Second perforation unit 30 as a result,
Edge and inside among the circumferential edge 34 of land portion 7B at right angles to intersect, without forming acute angle-shaped small pieces portion.Therefore,
Improve the resistance to partial wear performance of the intermediate land portion 7B in inside.
First side 32 and the second side 33 are preferably the second rake 12 being respectively provided with the first perforation unit 10
Identical section shape.That is, the first side 32 and the second side 33, which are included from tread surface, has the furrow width bigger than cutter groove
The outside ditch portion of degree；And the cutter groove (illustration omitted) extended from the bottom of outside ditch portion to tire radial direction inner side.Such first
Side 32 and the second side 33 facilitate to inhibit the partial wear in land portion in the same manner as above-mentioned second rake 12.
As shown in Figure 1, tire-shoulder land portion 8 includes: the external shoulder land portion when being installed on vehicle as vehicle outside A
8A；And when being installed on vehicle as the inside tire-shoulder land portion 8B of vehicle interior side B.
In Fig. 5, as the figure being illustrated for the structure to tire-shoulder land portion 8, external shoulder land portion is shown
The enlarged drawing of 8A.As shown in figure 5, in tire-shoulder land portion 8, such as tire-shoulder transverse groove 35 and tire shoulder have circumferentially been alternately arranged along tire
Rill 37.
Tire-shoulder transverse groove 35 for example extends from tyre surface ground terminal Te to tire axial inside and is formed in tire-shoulder land portion 8
Terminal.The rigidity on the inside of the tire axial in tire-shoulder land portion 8 is improved as a result, obtains the excellent operation stabilization on dry pavement
Property.Also, such tire-shoulder transverse groove 35 will not flow into air from shoulder main groove 5, therefore help to reduce suction sound.
The angle, θ 5 relative to tire axial of tire-shoulder transverse groove 35 for example preferably tends to gradually increase on the inside of tire axial
Add.Such tire-shoulder transverse groove 35 wet road when driving, can by the water in ditch effectively to the tyre surface side ground terminal Te guide.
Such as outside from shoulder main groove 5 to tire axial of tire shoulder rill 37 extends and is formed eventually in tire-shoulder land portion 8
End.Tire shoulder rill 37 is for example including inside portion 38 and outside portion 39.
Inside portion 38 is for example connected to shoulder main groove 5, and is extended along tire axial.Such inside portion 38 helps to mention
High wet road performance.
Inside portion 38 for example preferably has section shape identical with the second rake 12.That is, inside portion 38 include from
Tread surface has the outside ditch portion of the ditch width bigger than cutter groove；And extend from the bottom of outside ditch portion to tire radial direction inner side
Cutter groove (illustration omitted).Such inside portion 38 facilitates to inhibit the partial wear in land portion in the same manner as the second rake 12.
Outside portion 39 is for example connected with the tire axial of inside portion 38 outside.It is set to the outside of external shoulder land portion 8A
Portion 39 does not reach tyre surface ground terminal Te for example, and forms terminal in tire-shoulder land portion 8A on the outside.
Outside portion 39 for example preferably has section shape identical with the first rake 11.That is, outside portion 39 is from tyre surface
Ground plane is made of (illustration omitted) cutter groove on earth.Such outside portion 39 helps to inhibit the near outer ends of tire shoulder rill 37
Partial wear.
The enlarged drawing of inside tire-shoulder land portion 8B is shown in FIG. 6.As shown in fig. 6, in inside tire-shoulder land portion 8B, with
External shoulder land portion 8A (shown in Fig. 5) has similarly circumferentially been alternately arranged tire-shoulder transverse groove 35 and tire shoulder rill 37 along tire.
The tire shoulder rill 37 for being set to inside tire-shoulder land portion 8B for example preferably extends to tyre surface ground terminal Te.It is such
Tire shoulder rill 37 helps to inhibit the deformation of the ground plane between each tire-shoulder transverse groove 35.
More than, pneumatic tire of the invention is described in detail, but the present invention is not limited to above-mentioned specific
Embodiment, and various modes can be changed to implement.
Embodiment
Specification based on table 1 has manufactured experimently the pneumatic tire of the size 195/65R15 of the basic tread contour with Fig. 1.Make
For comparative example, as shown in fig. 7, manufactured experimently intermediate land portion on the outside and be provided with do not include outside ditch portion perforation unit inflation
Tire.The wet road performance and resistance to partial wear performance of each test tire are tested.The common-use size of each test tire is surveyed
Method for testing is as follows.
Wheel rim: 15 × 6J is installed
Inner pressure of tire: 230kPa
Test vehicle: capacity 2400cc, front wheel drive car
Test tire installation location: all wheels
< wet road performance >
Using above-mentioned test vehicle, in the asphalt road for the radius 100m for being provided with the puddle that the depth of water is 5mm and length is 20m
It is travelled on face, and the transverse acceleration of front-wheel (horizontal G) is measured.As a result with the average cross that speed is under 50~80km/h
It is indicated to G, and with the index that the value of comparative example is 100.Numerical value is bigger, and expression wet road performance is more excellent.
The resistance to partial wear performance > of <
After using above-mentioned test vehicle driving certain distance, to the circumferential direction on the outside of the tire axial in land portion among outside
The abrasion loss at edge is measured.As a result the exponential representation for being 100 to the value of comparative example, numerical value is smaller to indicate resistance to partial wear
Performance is more excellent.
The result of test is shown in table 1.
Table 1
Test as a result, it is possible to confirm inhibit land portion partial wear with not damaging wet road performance.
Claims (8)
1. a kind of pneumatic tire, fetus face is provided with multiple tap drains extended circumferentially continuously along tire and described
The land portion that tap drain divides,
The land portion is provided with the perforation unit in the crosscutting land portion,
The perforation unit is in the V shape including the first rake and the second rake in plan view, and described first inclines
Inclined portion is tilted relative to tire axial, and second rake is configured at more leans on tire axially external than first rake
It position and is oppositely tilted with first rake,
First rake is made of the first cutter groove on earth from tread surface,
Second rake includes the outside ditch portion for having the ditch width bigger than the cutter groove from the tread surface；With
And the second cutter groove extended from the bottom of the outside ditch portion to tire radial direction inner side,
Second cutter groove and first cutter groove are continuous,
It is characterized in that,
The angle, θ 2 relative to tire axial of second rake is than first rake relative to tire axial
Angle, θ 1 is small.
2. pneumatic tire according to claim 1, wherein
The ditch wall surface of one side of the outside ditch portion and the cutter groove wall surface of a side of second cutter groove are continuous.
3. pneumatic tire according to claim 2, wherein
The ditch wall surface of another party of the outside ditch portion to tire radial outside to keep ditch width widened towards inclination.
4. pneumatic tire described in any one of claim 1 to 3, wherein
Second rake has the length of the tire axial smaller than first rake.
5. pneumatic tire described in any one of claim 1 to 3, wherein
The depth of the outside ditch portion is 0.15~0.35 times of the depth of second rake.
6. pneumatic tire described in any one of claim 1 to 3, wherein
The inner end of the tire axial of the outside ditch portion, the vertex intersected with first rake and second rake it
Between tire axial distance in 3.0mm or less.
7. pneumatic tire described in any one of claim 1 to 3, wherein
The pneumatic tire is designated the installation direction of vehicle,
The land portion includes a pair intermediate land portion for being set to the two sides of tire equator,
The pair of intermediate land portion include: when being installed on vehicle among the inside of vehicle interior side land portion；And
When being installed on vehicle among the outside of vehicle outside land portion,
The perforation unit is set to land portion among the outside.
8. pneumatic tire according to claim 7, wherein
Land portion is divided in the two sides of tire axial by the tap drain among the outside,
The land portion among the outside, be provided with from the tap drain on the outside of tire axial to extend on the inside of tire axial and
The non-through unit of terminal is formed among the outside in the portion of land,
The non-through unit is circumferentially alternately set with the perforation unit along tire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-012390 | 2015-01-26 | ||
| JP2015012390A JP6358970B2 (en) | 2015-01-26 | 2015-01-26 | Pneumatic tire |
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| CN105818614A CN105818614A (en) | 2016-08-03 |
| CN105818614B true CN105818614B (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610008628.5A Active CN105818614B (en) | 2015-01-26 | 2016-01-07 | Pneumatic tire |
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| JP (1) | JP6358970B2 (en) |
| CN (1) | CN105818614B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6834291B2 (en) * | 2016-09-21 | 2021-02-24 | 住友ゴム工業株式会社 | Pneumatic tires |
| JP6822095B2 (en) * | 2016-11-24 | 2021-01-27 | 住友ゴム工業株式会社 | tire |
| CN110422015B (en) * | 2018-05-01 | 2022-10-11 | 住友橡胶工业株式会社 | Tyre for vehicle wheels |
| JP7183961B2 (en) * | 2019-06-04 | 2022-12-06 | 横浜ゴム株式会社 | pneumatic tire |
| DE102020204072A1 (en) * | 2020-03-30 | 2021-09-30 | Continental Reifen Deutschland Gmbh | Pneumatic vehicle tires |
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| EP0457233A2 (en) * | 1990-05-14 | 1991-11-21 | PIRELLI COORDINAMENTO PNEUMATICI S.p.A. | Tread for motor vehicle tire |
| CN101472749A (en) * | 2006-06-23 | 2009-07-01 | 横滨橡胶株式会社 | Pneumatic tire |
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| CN104802604A (en) * | 2014-01-27 | 2015-07-29 | 住友橡胶工业株式会社 | Pneumatic tire |
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| CN105644275A (en) * | 2014-11-27 | 2016-06-08 | 住友橡胶工业株式会社 | Pneumatic tire |
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| JP3226968B2 (en) * | 1992-07-20 | 2001-11-12 | 株式会社ブリヂストン | Pneumatic tire |
| JPH0680002A (en) * | 1992-09-01 | 1994-03-22 | Yokohama Rubber Co Ltd:The | Heavy load pneumatic radial tire |
| JPH06191232A (en) * | 1992-12-25 | 1994-07-12 | Yokohama Rubber Co Ltd:The | Pneumatic tire for snow-covered |
| JP4777547B2 (en) * | 2001-06-29 | 2011-09-21 | 株式会社ブリヂストン | Pneumatic tire |
| JP4713785B2 (en) * | 2001-08-23 | 2011-06-29 | 株式会社ブリヂストン | Pneumatic tire |
| CN101370674A (en) * | 2006-01-17 | 2009-02-18 | 株式会社普利司通 | Pneumatic tire |
| JP4888170B2 (en) * | 2007-03-15 | 2012-02-29 | 横浜ゴム株式会社 | Pneumatic tire |
| DE102009003642A1 (en) * | 2009-03-19 | 2010-09-23 | Continental Reifen Deutschland Gmbh | Tread pattern of a pneumatic vehicle tire |
| JP2014156190A (en) * | 2013-02-15 | 2014-08-28 | Bridgestone Corp | Tire |
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| EP0457233A2 (en) * | 1990-05-14 | 1991-11-21 | PIRELLI COORDINAMENTO PNEUMATICI S.p.A. | Tread for motor vehicle tire |
| CN101472749A (en) * | 2006-06-23 | 2009-07-01 | 横滨橡胶株式会社 | Pneumatic tire |
| CN104108289A (en) * | 2013-04-18 | 2014-10-22 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN104802604A (en) * | 2014-01-27 | 2015-07-29 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN105564160A (en) * | 2014-10-30 | 2016-05-11 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN105644275A (en) * | 2014-11-27 | 2016-06-08 | 住友橡胶工业株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6358970B2 (en) | 2018-07-18 |
| CN105818614A (en) | 2016-08-03 |
| JP2016137749A (en) | 2016-08-04 |
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