CN103596776B - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
- Publication number
- CN103596776B CN103596776B CN201280027675.4A CN201280027675A CN103596776B CN 103596776 B CN103596776 B CN 103596776B CN 201280027675 A CN201280027675 A CN 201280027675A CN 103596776 B CN103596776 B CN 103596776B
- Authority
- CN
- China
- Prior art keywords
- tire
- land
- transverse slot
- slot portion
- row
- 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.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
- B60C11/13—Tread patterns characterised by the groove cross-section, e.g. for buttressing or preventing stone-trapping
- B60C11/1376—Three dimensional block surfaces departing from the enveloping tread contour
- B60C11/1384—Three dimensional block surfaces departing from the enveloping tread contour with chamfered block corners
-
- 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
- B60C11/0306—Patterns comprising block rows or discontinuous ribs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Provided is a pneumatic tire which is configured so that the pneumatic tire has increased resistance to external damage to minimize the occurrence of damage to the tire and so that the tire has satisfactory noise performance. A pneumatic tire has disposed on the tread thereof at least three land rows (8, 9L, 9R, 10L, 10R) defined and formed by two or more circumferential main grooves (6L, 6R, 7L, 7R) and the tread ends (TE). The at least three land rows include a center land row (8) located on the equator (C) of the tire. The center land row (8) comprises blocks divided by lateral grooves (11) connecting the two circumferential main grooves (6L, 6R) which are adjacent to each other. Each of the lateral grooves (11) comprises: a pair of lateral groove bodies (11a, 11b), the first lateral groove body (11a) extending from one end of the center land row (8) toward the equator of the tire and terminating in land, the second lateral groove body (11b) extending from the other end of the center land row (8) toward the equator of the tire and terminating in the land, the terminating end of the first lateral groove body (11a) and the terminating end of the second lateral groove body being separated from each other in the circumferential direction of the tire; and a communication section (17) for connecting, in the circumferential direction of the tire, the terminating end of the first lateral groove body (11a) and the terminating end of the second lateral groove body (11b). The dimension of the center land row (8) in the width direction of the tire is greater than the dimension of any one of the remaining land rows (9L, 9R, 10L, 10R) of the at least three land rows.
Description
Technical field
The present invention relates generally to a kind of pneumatic tire, especially, the present invention relates to a kind of improve in the road do not paved
Resistance to surface damage and the pneumatic tire with gratifying noise suppression characteristics when travelling on road.
Background technology
In pneumatic tire, tyre surface is typically designed to have by forming multiple circumferential slots and multiple transverse grooves and is formed
Pattern block pattern, to guarantee the desired braking/driveability of tire.For example, patent document 1 discloses that following setting：
The traction decorative pattern of the row of the pattern block formed based on the transverse groove communicated with each other by five circumferential major troughs and with circumferential major trough.
Prior art literature
Patent documentation
Patent documentation 1：Japanese Unexamined Patent Publication 2008-222074 publications
The content of the invention
Problems to be solved by the invention
However, when the pneumatic tire with the pattern block pattern as disclosed in patent documentation 1 is in the road do not paved
During upper traveling, tire can suffer from damaging.This damage is additionally included on grit road during traveling, invades and keep in stone
The perforation occurred when under the embedding stone state in the circumferential major trough of fetus face using tire, the perforation occur to cause in fetus face
The cracks can spread of formation is damaged and produces rubbery chip or shaping crack in being additionally included in circumferential major trough to belt.This damage
Tend to significantly more to occur in heavy load pneumatic tire, the ground pressure wherein at tread surface is high and groove depth is big.
Therefore, it is an object of the invention to provide a kind of pneumatic tire, which can suppress to travel on the road do not paved
Shi Fasheng tyre injuries, so that improve the resistance to surface damage during traveling on the road do not paved.
For solution to problem
The present inventor has carried out thorough research and investigation to the tread contour for being adapted for carrying out above-mentioned purpose.
As a result, it is noted that the ground pressure highest thing during straight-line travelling or driving at the middle section of fetus face
It is real, it has been found that：If the fact is considered when pattern block pattern is designed, can realize what resistance to surface damage was improved
Pneumatic tire.In particular, it was found that：In the pattern block pattern as disclosed in patent documentation 1, if with along week on tire centerline
Circumferential major trough is set to the continuous mode for extending, then stone tends to invade centrage during travelling on the road do not paved
On circumferential major trough in, thus cause embedding stone state and cause final perforation.Also it is found that：Because ground pressure is in central area
Highest at domain, so the pattern block in the region undergoes the risk trend highest damaged.Based on these discoveries, it is clarified above：It is logical
The difference of the ground pressure crossed between the zones of different for considering tread surface, if undergo the risk of the surface damage from road surface
Pattern block in the centrally located region of highest extends along tire width direction, then can effectively reduce the table in middle section
Surface damage, the resistance to surface damage overall so as to improve tire.
However, in this example, because for splitting extending along tire width direction for the pattern block in middle section
Groove extends on tire width direction, so exist
Potential risk.Inventor has found：With regard to arranging wide pattern block in middle section, if extended along tire width direction
Groove be divided into the two parts staggered in tire circumference, then can realize with improve resistance to surface damage and make us full
The pattern block pattern of the noise suppressed performance of meaning, so as to envisioning the present invention and realizing with the resistance to surface damage for improving
With the tire of gratifying noise suppressed performance.
Below, the feature of the novelty of the present invention is illustrated in further detail.
A first aspect of the present invention is a kind of pneumatic tire, and which includes fetus face, and the fetus face is provided with by tyre surface
At least three land rows that end and at least two circumferential major troughs are limited, wherein：
- at least three land row includes the center land row in tire equator, wherein, the center land row
The multiple pattern blocks being partitioned into by multiple transverse grooves of two circumferential major troughs adjacent to each other of connection are formed；
- each transverse groove includes a pair of transverse slot portions being made up of the first transverse slot portion and the second transverse slot portion, institute
State the first transverse slot portion to extend towards the tire equator from an edge of the center land row and terminate in the portion of land, it is described
Second transverse slot portion extends towards the tire equator from the other edge of the center land row and terminates in the land portion,
So that the terminal of the terminal of first transverse slot portion and second transverse slot portion is opened tire is circumferentially-spaced, each horizontal stroke
Also include interconnecting part to groove, the interconnecting part is used for making the terminal and second transverse slot portion of first transverse slot portion
Terminal communicates with each other in tire circumference；And
The size along the tire width direction measurement of-center land row is more than its at least three land row
The size along tire width direction measurement of the arbitrary land row in its land row.
A second aspect of the present invention is the pneumatic tire according to first aspect, wherein described center land row along tire
The size of width measurement is the land row of the size with maximum tire width in other land rows along tire width
1.5 to 2.0 times of the size of degree orientation measurement.
A third aspect of the present invention is the pneumatic tire according to second aspect, wherein：
- first transverse slot portion is with towards the inclined mode in tire circumference side from an edge of the center land row
Extend towards the tire equator；And
- second transverse slot portion is with towards the inclined mode in tire circumference side from the another of the center land row
One edge extends towards the tire equator.
A fourth aspect of the present invention is the pneumatic tire according to the third aspect, wherein described first transverse slot portion and described
Tire equator forms 75 ° to 85 ° of acute angle；Second transverse slot portion and the tire equator form 75 ° to 85 ° of acute angle.
A fifth aspect of the present invention is the pneumatic tire according to the third aspect or fourth aspect, and wherein described first is horizontal
The cell wall of groove portion and second transverse slot portion in tire circumference side is inclined plane.
A sixth aspect of the present invention be according to first aspect to the 5th in terms of in either side pneumatic tire, wherein
0.2 to 0.4 pitch amount of the phase shifting of the phase place of first transverse slot portion and second transverse slot portion.
A seventh aspect of the present invention be according to first aspect to the 6th in terms of in either side pneumatic tire, wherein
First pattern block corner is formed by first transverse slot portion and the interconnecting part, by second transverse slot portion and described
Interconnecting part forms the second pattern block corner, wherein described first pattern block corner and the second pattern block corner chamfering.
A eighth aspect of the present invention be according to first aspect to the 7th in terms of in either side pneumatic tire, wherein
The depth of the transverse groove reduces towards the tire equator.
The effect of invention
The present invention provides a kind of pneumatic tire, and which improves resistance to tyre injury so as to suppressing the generation of tire infringement and having
There is gratifying noise suppressed performance.
Description of the drawings
Fig. 1 is the sectional view of the tire width direction of pneumatic tires according to the present invention；
Fig. 2 is the partially unfolded figure of the tread surface of pneumatic tires according to the present invention；
Fig. 3 be include Fig. 2 in the enlarged drawing in the region of the fetus face of center land row that illustrates；
Fig. 4 is the inclined plane for limiting the cell wall of the second transverse slot portion that the direction of arrow illustrated in Fig. 3 is seen
Figure；
Fig. 5 is the figure for illustrating transverse groove in the depth of the center position of groove；
Fig. 6 is the partially unfolded figure of the tread surface of conventional pneumatic；And
Fig. 7 is the partially unfolded figure of the airtyred tread surface of comparative example.
Specific embodiment
Pneumatic tires according to the present invention is more fully described below with reference to accompanying drawings, and wherein Fig. 1 is of the invention
The sectional view of airtyred tire width direction；Fig. 2 is the partially unfolded of the tread surface of pneumatic tires according to the present invention
Figure；Fig. 3 be include Fig. 2 in the enlarged drawing in the region of the fetus face of center land row that illustrates；Fig. 4 is the arrow illustrated in Fig. 3
The figure for limiting the inclined plane of the cell wall of the second transverse slot portion that head direction is seen；Fig. 5 is to illustrate transverse groove at the center of groove
The figure of the depth at position；Fig. 6 is the partially unfolded figure of the tread surface of conventional pneumatic；Fig. 7 is comparative example pneumatic tire
Tread surface the partially unfolded figure.
Pneumatic tires according to the present invention 1 (hereinafter referred to as " tire ") is shown in Fig. 1, and which includes：A pair of tires
Circle portion, bead core 2,2 are embedded in this pair of bead part；And as the carcass 3 of skeleton, its annularly across bead part it
Between, wherein carcass 3 includes bizet 3c.Belt 4 is configured in the radial outside of bizet 3c, arranges slotted fetus face 5 and is formed
In the radial outside of belt 4.The structure of bead part, carcass and belt is shown only by means of example, the structure is not used in
Limit the present invention.
Fetus face 5 has tread surface, figure 2 illustrates the partially unfolded figure of tread surface.
The tread surface of fetus face 5 is provided with circumferentially extending and by two or more circumferential major trough and tyre surface end along tire
At least three land rows that TE is limited.More specifically, the tread surface of the fetus face 5 of tire 1 be provided with it is circumferentially extending along tire
And five land rows 8,9L, 9R, 10L, 10R being limited by four circumferential major troughs 6L, 6R, 7L, 7R and tyre surface end TE.
These land rows include the center land row in tire equator, i.e., the central authorities on C under the line as shown in Figure 2
Land row 8.Center land row is made up of multiple center running lugs, and the plurality of central decorative pattern is split by multiple transverse grooves, transverse groove
So that communicating with each other across two adjacent circumferential major troughs of tire equator.More specifically, center land row 8 is by multiple central decorative patterns
Block 14 is constituted, and the plurality of center running lug 14 is split by multiple transverse grooves 11 (only illustrating three transverse grooves therein in fig. 2),
Transverse groove 11 causes to communicate with each other across two adjacent circumferential major troughs 6L, 6R of tire equator.
As shown in Fig. 2 land row 9L, 9R, 10L, 10R in addition to center land row 8 is equally included by multiple horizontal
Multiple pattern block 15L, 15R, 16L, 16R of groove 12L, 12R, 13L, 13R segmentation.
Next, showing the enlarged drawing in the region of the fetus face 5 including the center land row 8 illustrated in Fig. 2 in Fig. 3.
According to the present invention, initially, it is important that, each transverse groove for center land row 8 to be divided into pattern block includes：
(A) a pair of transverse slot portions, which is by from an edge of center land row is towards tire equator extension and terminates in land portion
The first interior transverse slot portion and the other edge from center land row extend towards tire equator and terminate in the portion of land second
Transverse groove is constituted so that the terminal of the terminal of the first transverse slot portion and the second transverse slot portion is opened tire is circumferentially-spaced；And
(B) interconnecting part, which is used for the terminal of the terminal of the first transverse slot portion and the second transverse slot portion in tire circumference
Communicate with each other.Thus, in the embodiment that figure 3 illustrates, transverse groove 11 is by the first transverse slot portion 11a and the second transverse slot portion
11b constitute, the first transverse slot portion 11a from an edge (right side in Fig. 3) of center land row 8 towards tire equator C extend and
Terminate in the portion of land, the second transverse slot portion 11b is from the other edge (left side in Fig. 3) of center land row 8 towards tire equator C
Extend and terminate in the following position in center land row 8：The position and terminal E of the first transverse slot portion 11a11aIn circumference
It is upper to be spaced apart.Each transverse groove 11 also includes interconnecting part 17, and which is extended into the terminal of the first transverse slot portion 11a in tire circumference
E11aWith terminal E of the second transverse slot portion 11b11bConnection.Here, the first transverse slot portion 11a is the groove portion extended along tyre width,
One end opening is to circumferential major trough 6R and its other end is terminated at tire equator C；Second transverse slot portion 11b is along tyre width
The groove portion of extension, one end opening is to circumferential major trough 6L and its other end is terminated at tire equator C；Interconnecting part 17 is in tire
By terminal E of the first transverse slot portion 11a in circumference11aWith terminal E of the second transverse slot portion 11b11bThe groove portion of connection.
That is, transverse groove 11 is not between two adjacent circumferential major troughs 6L, 6R of tire equator C, merely straight line prolongs
The groove stretched；But, by the groove extended between circumferential major trough 6L, 6R is divided on tire width direction two transverse grooves
Portion and the position of terminal of transverse slot portion is made to stagger in tire circumference and be formed.In other words, transverse groove 11 is formed：Make
Tire equator C is able to for border, the first transverse slot portion 11a is configured in the side of tire width direction, and the second transverse slot portion 11b is matched somebody with somebody
The opposite side in tire width direction, and the terminal of these transverse slot portions are put by the way of tire is circumferentially spaced apart from one another
It is configured in the portion of land.
Transverse groove produces impact noise or other noises (hereinafter referred to as due to contacting the impact for causing with road surface
" pitch noise ").According to the present invention, as described above, being not provided with circumferential major trough in tire equator and causing center land
Row 8 are wide, and the transverse groove 11 that result in the extension of cross-section center land row 8 is wide on tire width direction.Thus, if transverse groove 11
Extended with the cross-section center land row of rectilinear form 8, then produce corresponding coarse pitch noise.If however, the first transverse slot portion 11a
The side of tire width direction is configured in, the second transverse slot portion 11b is configured in the opposite side of tire width direction, and these are horizontal
Terminal to groove portion is to be configured in the portion of land in the way of tire is circumferentially spaced apart from one another (if i.e., transverse groove is divided into
A pair of the transverse slot portions staggered in tire circumference), then the moment that the noise that can stagger is produced, tire is overall to make us to maintain
Satisfied noise suppressed performance.
Additionally, except the side across tire equator C, the first transverse slot portion 11a on tire width direction, second horizontal
Outside the configuration that opposite sides of the groove 11b on tire width direction and their terminal stagger in tire circumference, transverse groove 11
The interconnecting part 17 for connecting these transverse slot portions being additionally included in tire equator C.Here, although high ground pressure is acted on
Pattern block and pattern block in tire equator C undergoes the highest from road surface during travelling to be impacted, but interconnecting part 17
Setting makes it possible to suppress area of the pattern block between the terminal of the terminal and the second transverse slot portion 11b of the first transverse slot portion 11a
Crack at domain.
Additionally, according to the present invention, it is important that center land row is wider than other land rows.
More specifically, as shown in Fig. 2 center land row 8 on tire width direction must with than other land rows 9L,
Length y of 9R, 10L, 10R9L、y9R、y10L、y10RAny of all big size x.I.e., in the embodiment as shown,
Although size of the center land row 8 on tire width direction is more much larger than these length so that x>y10L、y10RBut, at other
In land row 9L, 9R, 10L, 10R, land row 10L, 10R has most long size (y on tire width direction10L、y10R>y9L、
y9R).Here, for " size in the direction of the width " of each land row refers to two outermosts of the land row on tire width direction
The distance between lateral edges.As it is used herein, term " length on tire width direction " and term are " in tyre width side
Size upwards " is synonym each other.
In pneumatic tires according to the present invention, for example can be installed on approval wheel rim and in non-loaded bar in tire
In the state of being inflated to predetermined internal pressure under part, measure " length on tire width direction " and " on tire width direction
Size ".Term " approval wheel rim " refer to by such as Japanese Japanese automobile tyre manufacture NAB National Association 0f Broadcasters publication JATMA yearbooks, by
ETRTO manuals of standards that the European tyre Rim Technical Organisation of European countries is published, published by the tyre rim association in the U.S.
The wheel rim that the industrial standard being suitable in Tire production ground or territory of use domain of TRA yearbooks etc. is limited.Additionally, word is " without negative
Predetermined internal pressure is inflated under the conditions of load " finger wheel tire is inflated to the maximum load capability with the tire limited by standard applicatory
The no-load condition (that is, not being supported) of corresponding intrinsic pressure (maximum gas pressure).
In straight-line travelling or driving, the land row positioned at middle section in each region of tread surface has maximum
Diameter of tyres and the maximum pressure for undergoing from road surface, and most frequently contact with road surface.Thus, if be configured in including wheel
Land row in the middle section in abnormal red skin of infant road is designed to have the width of increase and the land portion rigidity for thus improving, then can be with
Improve the endurance to the pressure from road surface and impact.Additionally, in said structure, tire equator is without circumferentially continuous along tire
The circumferential major trough that ground extends.In other words, extension circumferentially continuous along tire is not provided with the region that road surface most contacts fiercely
Circumferential major trough.Therefore, it is possible to effectively suppress to invade the embedding stone caused in circumferential major trough due to stone.Even if additionally, this
Plant embedding stone to occur, the land row in the middle section that embedding stone is most likely to occur also has the land portion rigidity for improving.It has been thus able to
Effect ground rejection iris, if the embedding Plumbum preparatium Bits Expanding damaged from tread surface is to belt, may occur above-mentioned perforation.With
This mode, according to the present invention it is possible to improve resistance to surface damage at the most incident middle section of surface damage.
In order to ensure more efficiently realizing above-mentioned effect, it is preferable that the center running lug 14 being arranged in tire equator C
Size on tire width direction is 1.2-1.9 times of the circumferential lengths of the pattern block.In order to more effectively realize above-mentioned work
With it is further preferred that size of the center running lug on tire width direction is tread width (two tires on tire width direction
The distance between face end TE) 0.25-0.35 times.
In said structure, it is preferable that the width of center land row is with Breadth Maximum in other land rows
1.5-2.0 times of the width of land row.Here, the width of center land row is the center land row along tire width direction measurement
Size.In fig. 2 with the embodiment that illustrates in Fig. 3 in, in other land rows 9L, 9R, 10L, 10R, land row 10L,
10R has most long width y10L、y10R.Thus, relative to other land rows in most wide land row 10L, 10R width y10L、
y10R, the width x of center land row 8 preferably meets following relation：1.5≤x/(y10L、y10R)≤2.0。
By this way, the center land row 8 in the middle section including tire equator is designed to have sufficiently large
Width, the sufficiently large width not less than 1.5 times of Breadth Maximum in the width of other land rows, to provide land portion
High rigidity and to the pressure from road surface and impact high endurance.As a result, it is possible to increase being most susceptible to the central authorities of surface damage
Resistance to surface damage at region.The width is defined as 2 times of the Breadth Maximum in the no more than width of other land rows
Reason is：If the width of center land row is excessive, other land rows will it is narrow so that it cannot provide needed for rigidity,
So that land portion can not be effectively acted in tread surface.If additionally, so that center land row 8 is sufficiently wide and also will maintain
The width of other land rows, then the major trough for limiting land row will narrow, and thus reduce drainage performance and reduce wheel
The wet Pavement Performance of tire.
In transverse groove 11, the first transverse slot portion 11a and the second transverse slot portion 11b are across tire equator C, with same wheel
The mode that tire peripheral side obliquely extends towards tire equator C is configured in the side on tire width direction and opposite side.For example,
With reference to the transverse groove 11 illustrated in Fig. 3, the first transverse slot portion 11a is with inclined towards a tire circumferential (downside in Fig. 3)
Mode extends from an edge of center land row 8 towards tire equator C；Second transverse slot portion 11b is with same tire circumference
(downside in Fig. 3) inclined mode extends from the other edge of center land row 8 towards tire equator C so that first is horizontal
The terminal of the terminal of groove portion 11a and the second transverse slot portion 11b is circumferentially spaced apart from one another in tire.By designing by this way
First transverse slot portion 11a and the second transverse slot portion 11b, circumferentially observe along tire, from terminal E of the first transverse slot portion 11a11aRise
Drainage direction and terminal E from the second transverse slot portion 11b11bThe drainage direction for rising only is another week only in one direction, i.e.,
To (upside in Fig. 3), which thereby enhance the drainage performance along constant direction and provide more preferable wet Pavement Performance.Work as finger
The tire in tyre rotation direction has been determined so that the first transverse slot portion is from one side on tire width direction of center land row
Edge towards tire be arranged on vehicle when enter into inclination tiltedly and the second transverse slot portion from center land row in tyre width side
Other edge upwards towards tire be arranged on vehicle when the inclined mode in side of entering into be arranged on vehicle on when, more specifically when
When tire is arranged on vehicle as follows：So that the terminal of each transverse slot portion is located at the side and towards circumferential major trough of entering into
Opening then can satisfactorily realize the action effect positioned at side is pedaled out.
For in passing, " tyre rotation direction " refers to the rotation side for making vehicle advance of the tire on vehicle
To.More specifically, tire is installed on vehicle and is appointed as tyre rotation direction with the direction indicated by arrow in Fig. 2
Mode is used, and tire is rotated in the direction.Can be by being provided for specifying the such as pressure in tyre rotation direction for tire
Print or the known elements that mark etc. are indicating tire rotation direction.
Moreover it is preferred that the first transverse slot portion 11a is relative to tire equator C-shaped α at an acute angle, the second transverse slot portion 11b phase
β at an acute angle for tire equator C-shaped, wherein these acute angles are respectively in the range of 75 ° to 85 °.Here, by the first transverse slot portion
11a relative to tire equator C-shaped into sharp angle α be by straight line P and tire equator C-shaped into angle in the angle less than 90 °, wherein
Straight line P connects terminal E in the land portion of the first transverse slot portion 11a11aWell width center in the circumference at place and towards circumferential major trough
Well width center in circumference at the opening of 6R.Similarly, by the second transverse slot portion 11b relative to tire equator C-shaped into
Acute angles beta be by straight line Q and tire equator C-shaped into angle in the angle less than 90 °, its cathetus Q connects the second transverse slot portion 11b
Land portion in terminal E11bWell width center in the circumference at place and towards the groove width in the circumference at the opening of circumferential major trough 6L
Degree center.
If angle α and angle beta are respectively less than 75 °, by splitting the center running lug 14 of the formation of center land row 8 with week
Long decorative pattern is block-shaped upwards, thus may reduce the rigidity on the width of center running lug.On the other hand, if angle
α and angle beta are all higher than 85 °, then the bearing of trend of transverse groove becomes substantial parallel with tire width direction, thus may the row of reduction
Aqueouss can be with wet Pavement Performance.
For in passing, when tire has the rotation direction specified, above-mentioned action effect can be satisfactorily realized.It is excellent
Selection of land, transverse slot portion 11a, 11b is to prolong towards pedaling out in the way of side inclines 5 ° to 15 ° of angle relative to tire width direction
Stretch.
Preferably, in the cell wall for limiting this pair of transverse slot portion 11a and 11b of transverse groove 11, in the circumferential side of tire
The cell wall of upper (downside in Fig. 3) is formed as with inclined plane.That is, if tire has the tyre rotation direction specified, preferably
Ground, in the cell wall for limiting this pair of transverse slot portion 11a and 11b of transverse groove 11, the side of entering into of the tire on vehicle
Cell wall is formed as with inclined plane.
The inclined plane for limiting the cell wall of the second transverse slot portion that the direction of arrow in Fig. 3 is seen is shown in Fig. 4.
As shown in Figure 4, it is preferable that in the cell wall of transverse groove 11, having in tire for the cell wall of tire circumference side, i.e. transverse groove refers to
The cell wall of the side of entering into during fixed rotation direction, is designed to have inclined plane.By the cell wall of side of entering into is designed with
Taper, it can be ensured that stone or the grains of sand are difficult to invade transverse groove, thus the generation of rejection iris.
In order to be effectively realized above-mentioned effect, it is preferable that cell wall relative to tire radial direction cone angle gamma be 15 ° extremely
25°.If cone angle is less than 15 °, however it remains the probability of embedding stone occurs, but if cone angle is more than 25 °, although the then appearance of groove
Product increased but the rubber mass in land portion is reduced so that abrasion performance is reduced.For in passing, as shown in figure 4, cone angle gamma is
The angle formed by the tire RADIAL and following straight line that radially extend through bottom land and along tire：The straight-line pass is entered into side
Cell wall inclined plane on the point R at the D/2 depth locations of 11 depth D of transverse groove and also pass through inclined plane and tyre surface table
Boundary point S between face.Additionally, in the embodiment that figure 4 illustrates, opposite side cell wall (here, pedaling out side) with
Tire is radial parallel and is not provided with inclined plane.
Transverse slot portion 11a, 11b is respectively facing tire equator C and extends and at tire position circumferentially spaced apart from one another
Place is terminated in center land row 8 so that the terminal of the terminal of the first transverse slot portion 11a and the second transverse slot portion 11b is in tire
It is circumferentially spaced apart from one another.In this example, it is preferable that the phase of the phase place of the first transverse slot portion 11a and the second transverse slot portion 11b
Position is in the pitch amount for offsetting up 0.2 to 0.4 tire week.Here, 1 pitch refer to land portion by adjacent to each other in tire circumference
Two transverse slot portion (for example, the second transverse slot portion 11b, 11b) circumferential lengths for limiting and two transverse grooves for limiting the land portion
The summation of the half of total circumferential lengths in portion.By the phase shifting for causing transverse slot portion 11a, 11b in the above described manner, can press down
The gratifying noise suppression feature for producing and guaranteeing tire entirety of pitch noise processed.Due to the section less than 0.2 pitch
The moment that each transverse slot portion is contacted with road surface can not be caused fully to stagger away from side-play amount, and be more than the pitch side-play amount of 0.4 pitch
The rigid reduction of pattern block of center running lug 14 may be caused, it is thus determined that the scope of pitch as above.
First transverse slot portion 11a and interconnecting part 17 form the corner of pattern block, 17 shape of the second transverse slot portion 11b and interconnecting part
Into the corner of pattern block.Preferably, chamfering is carried out to these decorative pattern block portions.More specifically, because the first transverse slot portion 11a is big
The groove for extending on body in the width direction, interconnecting part 17 are generally intersected at a right angle ground, generally edge with the first transverse slot portion 11a
Circumferentially extending groove, the center running lug 14 limited by the first transverse slot portion 11a and interconnecting part 17 have generally at a right angle
Corner.Preferably, chamfering is carried out to the corner as shown in the shadow part in Fig. 3.It is further preferred that similarly such as the shade in Fig. 3
Chamfering is carried out to the corner between interconnecting part 17 and the second transverse slot portion 11b shown in portion.
The position that the corner of pattern block is located is compared with other positions with low-down pattern block rigidity.Additionally, as above
Described, in tread surface, middle section undergoes high ground pressure and the most fierce impact from road surface.Thus, if angle
Portion maintains its original-shape, then the probability that corner is damaged is high.For that reason, diagonal section chamfering is eliminating substantially
The corner at right angle and corner is configured to into obtuse angle, so that the generation for damaging can be suppressed.
It is further preferred that the depth of transverse groove 11 reduces towards tire equator C, and it is further preferred that transverse groove 11
Depth is incrementally decreased towards tire equator C.Figure when lower portion in Fig. 5 shows that transverse groove 11 is circumferentially observed.Such as
Shown in Fig. 5, it is preferable that on tire width direction, the bottom land of long transverse groove 11 is with from opening to each of tire circumferential major trough
The shape being open towards tire equator C protuberance.
By this way, by reducing tire equator C for undergoing high ground pressure and most fierce impact from road surface
The groove depth at place, during the center running lug 14 that can suppress on tire width direction long collapses to transverse groove 11 and can improve
Pattern block rigidity.In this example, when transverse groove be designed to have from it is each opening gradually swell towards tire equator C,
The generation of crackle during the bottom land without step and continuous shape, can be suppressed.
In order to be effectively realized above-mentioned effect, transverse groove 11 is defined as existing than transverse groove in the groove depth at tire equator C
Groove depth at its opening is shallow.Preferably, the bump height " h " from bottom land position at opening is 2.0mm-3.0mm.
[example]
Then, example tire of the invention, the conventional tire according to prior art and comparative example have been prepared for
The prototype of tire, to evaluate resistance to surface damage, noise suppression feature and wet Pavement Performance respectively.
Example tire is made with the band tyre of pattern block pattern as shown in Figure 2, and the band tyre has
The tire size of 315/80R22.5,22.5 × 9.00 maximum load for checking and approving wheel rim, 830kPa intrinsic pressure and 3.2 tons.At this
In band tyre, center land row size x in the direction of the width is x=70mm, and other land rows are on tire width direction
Size y9L、y9R、y10L、y10RIt is y9L、y9R=40mm, y10L、y10R=45mm, shows other details in table 1.
Conventional tire be provided with tire equator C circumferential major trough and cross-section two center running lugs row it is linearly extended
Transverse groove, the band tyre with pattern block pattern as shown in Figure 6.The details of the tire is shown in table 1.
Additionally, except a pair of transverse slot portions do not stagger in tire circumference, communicate with each other on tire width direction and greatly
On body it is in a V-shaped outside, comparative example tire with example tire generally like construction.The tire is shown in table 1
Details.
Table 1
In order to evaluate resistance to surface damage in the manner as described below, example tire and the conventional wheel of each 20 is prepared for
Tire and this each 20 example tire and conventional tire are installed to the trailing wheel of 10 test vehicles so that the arrow in accompanying drawing
Direction indicated by head is oriented as rotation direction (direction of advance).Here, the test vehicle for using equipped with front-wheel two
Four tires of individual tire and trailing wheel.Four tires of trailing wheel two tires and right side rear wheel by left side rear wheel
Two tire compositions.
More particularly, 10 chassis have been prepared altogether, including：Four of the trailing wheel being respectively equipped with when vehicle advances
3 chassis of example tire；3 chassis of four conventional tires of the trailing wheel being each configured with when vehicle advances；Point
Not equipped with 2 chassis of two conventional tires of two example tires and right side rear wheel of left side rear wheel；And point
Not equipped with 2 chassis of two example tires of two conventional tires and right side rear wheel of left side rear wheel.
Additionally, having prepared 10 chassis altogether to evaluate resistance to surface damage, modified example tire is wherein installed to replace tradition
Tire.
100,000km (the 90,000km on floor slab are travelled longer than in Surface of Trial Pavement by causing these vehicles
With the 10,000km on Unpaved Surface) evaluating to resistance to surface damage.By checking the decorative pattern in middle section
The surface damage at the edge of block and the embedding stone at the bottom land of the transverse groove in middle section or perforation and the infringement that causes are commenting
The resistance to surface damage of valency.More particularly, to the surface damage at the edge of 62 center running lugs on the periphery of object tire
The quantity of quantity and the damage caused due to embedding stone or perforation at the bottom land of the transverse groove in middle section is measured, and
And be compared between example tire, conventional tire and/or modified example tire.Comparative result is shown in table 1.Note
Meaning, table 1 show the index for relative evaluation, and the wherein evaluation result for conventional tire is 100；The index for illustrating is got over
Greatly, then resistance to surface damage is higher.
Additionally, in order to evaluate noise suppression feature and wet Pavement Performance in the following manner, having prepared equipped with when before vehicle
The vehicle of four example tires of trailing wheel when entering, equipped with four conventional tires of the trailing wheel when vehicle advances
The vehicle of vehicle and four comparative example tires equipped with the trailing wheel when vehicle advances.
Noise fest by using these vehicles and when being given it the gun is evaluating to noise suppression feature.
More particularly, with 80km/h before above-mentioned vehicle is interval in arrival noise measurement on the road surface limited by 10844 standards of ISO
Constant speed drive, once the front end of vehicle reaches surveying range, then make the accelerator pedal that pushes completely and above-mentioned vehicle reality
Now accelerate until leaving surveying range completely.In this case, it is horizontal at the midpoint of the surveying range on traveling centrage
The microphone of fixation is installed, to measure the noise during giving it the gun at 7.5m and the position away from road surface 1.2m height.In invention
Example tire, between conventional tire and/or comparative example tire, compare measured value.Comparative result is shown in table 1.Note, table 1 refers to
Go out the index for relative evaluation, the wherein evaluation result for conventional tire is 100；The index for illustrating is bigger, then noise
Rejection characteristic is better.
Additionally, being evaluated to wet Pavement Performance by making above-mentioned vehicle undergo on wet road surface traveling.More particularly,
During vehicle is travelled according to the sensory evaluation of the sensation of test drive person come evaluate wet Pavement Performance and example tire,
Comparative evaluation value between conventional tire and/or comparative example tire.Comparative result is shown in table 1.Note, table 1 shows use
In the index of relative evaluation, the wherein evaluation result for conventional tire is 100；The index for illustrating is bigger, then wet road surface property
Can be higher.
As it can be seen from table 1 compared with conventional tire, example tire and the resistance to surface damage of comparative example tire are carried
It is high.It can also be seen that compared with comparative example tire, example tire has preferable noise suppression feature.
Industrial applicability
As described above, the invention allows to providing a kind of pneumatic tire, which improves resistance to tyre injury so as to suppress wheel
Tire damage generation and have gratifying noise suppressed performance.
Description of reference numerals
1 pneumatic tire
2 bead cores
3 carcasses
4 belts
5 fetus faces
6L, 6R circumferential major trough
7L, 7R circumferential major trough
8 center land rows
9L, 9R land row
10L, 10R land row
11 transverse grooves
11a, 11b transverse slot portion
12L, 12R transverse groove
13L, 13R transverse groove
14 center running lugs
15L, 15R pattern block
16L, 16R pattern block
17 interconnecting parts
C tire equators
The depth of the horizontal groove bodies of D
TE tyre surface ends
Claims (6)
1. a kind of pneumatic tire, which includes fetus face, and the fetus face is provided with and is limited by tyre surface end and at least two circumferential major troughs
At least three fixed land rows, wherein：
- at least three land row includes the center land row in tire equator, and the center land row is by connecting two
Multiple pattern blocks that multiple transverse grooves of individual circumferential major trough adjacent to each other are partitioned into are formed；
- each transverse groove includes a pair of transverse slot portions being made up of the first transverse slot portion and the second transverse slot portion, described
One transverse slot portion extends towards the tire equator from an edge of the center land row and terminates in the portion of land, described second
Transverse slot portion extends towards the tire equator from the other edge of the center land row and terminates in the land portion so that
The terminal of the terminal of first transverse slot portion and second transverse slot portion is opened tire is circumferentially-spaced, each transverse groove
Also include interconnecting part, the interconnecting part is used for the terminal of the terminal and second transverse slot portion for making first transverse slot portion
Communicate with each other in tire circumference；
The size along the tire width direction measurement of-center land row is more than other lands at least three land row
The size along tire width direction measurement of the arbitrary land row in portion's row；And
First transverse slot portion is with the edge direction towards the inclined mode in tire circumference side from the center land row
The tire equator extends；Second transverse slot portion is with towards the inclined mode in tire circumference side from the central land
The other edge of portion's row extends towards the tire equator,
The interconnecting part is located in the tire equator and is extended parallel to the tire equator,
The fetus face is with five land rows limited by the tyre surface end and four circumferential major troughs, the center land
Size x on tire width direction of row (8) is located at tire width direction outermost in being more than five land rows
Size y on tire width direction to land row (10L, 10R)10L、y10R, i.e. x>y10L、y10R；In five land rows
Positioned at size y on tire width direction of tire width direction outermost a pair of land rows (10L, 10R)10L、y10RGreatly
In five land rows on the outside of tire width direction with the center land row (8) adjacent pair land row (9L,
Size y on tire width direction 9R)9L、y9R, i.e. y10L、y10R>y9L、y9R,
The depth of the transverse groove reduces towards the tire equator,
The bottom land of the transverse groove is wheel chair access continuous shape.
2. pneumatic tire according to claim 1, it is characterised in that the center land row is surveyed along tire width direction
The size of amount is measuring along tire width direction for the land row of the size with maximum tire width in other land rows
1.5 to 2.0 times of size.
3. pneumatic tire according to claim 1 and 2, it is characterised in that first transverse slot portion is relative to the wheel
Abnormal red skin of infant road forms 75 ° to 85 ° of acute angle；Second transverse slot portion forms 75 ° to 85 ° sharp relative to the tire equator
Angle.
4. pneumatic tire according to claim 1 and 2, it is characterised in that first transverse slot portion and described second horizontal
It is inclined plane to cell wall of the groove portion in tire circumference side.
5. pneumatic tire according to claim 1 and 2, it is characterised in that the phase place of first transverse slot portion and described
0.2 to 0.4 pitch amount of the phase shifting of the second transverse slot portion.
6. pneumatic tire according to claim 1 and 2, it is characterised in that by first transverse slot portion and the company
Logical portion forms the first pattern block corner, forms the second pattern block corner, institute by second transverse slot portion and the interconnecting part
State the first pattern block corner and the second pattern block corner chamfering.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011161237 | 2011-07-22 | ||
| JP2011-161237 | 2011-07-22 | ||
| PCT/JP2012/004632 WO2013014897A1 (en) | 2011-07-22 | 2012-07-20 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103596776A CN103596776A (en) | 2014-02-19 |
| CN103596776B true CN103596776B (en) | 2017-03-22 |
Family
ID=47600768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280027675.4A Expired - Fee Related CN103596776B (en) | 2011-07-22 | 2012-07-20 | Pneumatic tire |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5986567B2 (en) |
| CN (1) | CN103596776B (en) |
| WO (1) | WO2013014897A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5841572B2 (en) * | 2013-08-05 | 2016-01-13 | 住友ゴム工業株式会社 | Heavy duty tire |
| JP6388013B2 (en) * | 2016-10-26 | 2018-09-12 | 横浜ゴム株式会社 | Pneumatic tire |
| JP6332481B1 (en) | 2017-01-11 | 2018-05-30 | 横浜ゴム株式会社 | Pneumatic tire |
| JP7087890B2 (en) * | 2018-09-28 | 2022-06-21 | 住友ゴム工業株式会社 | tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340040B1 (en) * | 1998-10-30 | 2002-01-22 | Sumitomo Rubber Industries, Ltd. | Vehicle tire including main grooves and lug grooves |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0747812A (en) * | 1993-08-03 | 1995-02-21 | Sumitomo Rubber Ind Ltd | Pneumatic tire |
| JP3554423B2 (en) * | 1995-12-08 | 2004-08-18 | 株式会社ブリヂストン | Pneumatic radial tire |
| JP3771353B2 (en) * | 1997-05-02 | 2006-04-26 | 株式会社ブリヂストン | Pneumatic tire |
| JP3035278B1 (en) * | 1998-10-30 | 2000-04-24 | 住友ゴム工業株式会社 | Pneumatic tire |
| JP4189980B2 (en) * | 1998-11-27 | 2008-12-03 | 株式会社ブリヂストン | Pneumatic tire |
| JP4873514B2 (en) * | 2001-01-29 | 2012-02-08 | 東洋ゴム工業株式会社 | Pneumatic tire |
| JP4323171B2 (en) * | 2003-01-10 | 2009-09-02 | 株式会社ブリヂストン | Heavy duty pneumatic radial tire |
| JP4268034B2 (en) * | 2003-12-26 | 2009-05-27 | 株式会社ブリヂストン | Pneumatic tire |
-
2012
- 2012-07-20 JP JP2013525577A patent/JP5986567B2/en not_active Expired - Fee Related
- 2012-07-20 CN CN201280027675.4A patent/CN103596776B/en not_active Expired - Fee Related
- 2012-07-20 WO PCT/JP2012/004632 patent/WO2013014897A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6340040B1 (en) * | 1998-10-30 | 2002-01-22 | Sumitomo Rubber Industries, Ltd. | Vehicle tire including main grooves and lug grooves |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2013014897A1 (en) | 2015-02-23 |
| CN103596776A (en) | 2014-02-19 |
| JP5986567B2 (en) | 2016-09-06 |
| WO2013014897A1 (en) | 2013-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10239358B2 (en) | Pneumatic tire | |
| CN101181864B (en) | Pneumatic tire for off-road traveling | |
| CN103895453B (en) | Pneumatic tire | |
| US12005742B2 (en) | Pneumatic tire | |
| CN105377588B (en) | Pneumatic tire | |
| CN101130332B (en) | Pneumatic tire | |
| AU2014388518B2 (en) | Pneumatic tire | |
| CN105026180B (en) | Pneumatic radial tire for passenger vehicle | |
| JP4814980B2 (en) | Pneumatic tire for running on rough terrain | |
| KR102220161B1 (en) | Car tyre | |
| EP2116397B1 (en) | Pneumatic tire | |
| JP5545874B2 (en) | Pneumatic tire | |
| US9457623B2 (en) | Pneumatic tire for running on rough terrain | |
| US20120024443A1 (en) | Motorcycle tire for off-road traveling | |
| US20140014244A1 (en) | Pneumatic tire | |
| JP6571093B2 (en) | Pneumatic tire | |
| US11104187B2 (en) | Pneumatic tire | |
| US11951776B2 (en) | Pneumatic tire | |
| CN103596776B (en) | Pneumatic tire | |
| EP2939853B1 (en) | Pneumatic tire | |
| US11498369B2 (en) | Tyre for vehicle wheels | |
| CN111587187B (en) | Pneumatic tire | |
| CN107738545B (en) | Tyre for heavy load | |
| US20210138842A1 (en) | Pneumatic Tire | |
| CN110077176B (en) | SUV all-terrain tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170322 Termination date: 20210720 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |