CN104417279B

CN104417279B - Tire

Info

Publication number: CN104417279B
Application number: CN201410437049.3A
Authority: CN
Inventors: 土屋达生
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2013-08-29
Filing date: 2014-08-29
Publication date: 2016-11-09
Anticipated expiration: 2034-08-29
Also published as: WO2015029861A1; CN104417279A; CN204095411U; JP2015044527A

Abstract

The present invention provides one drainage performance (wetland performance) can be suppressed to reduce and can improve the tire of abrasion resistance properties and control stability.Tire (1) has secondary circumferential slot (30) and multiple pattern groove laterally outside (40Aout) crossing secondary circumferential slot (30).Having inclined plane (33) on secondary circumferential slot (30), this inclined plane (33) extends continuously to tilt towards the shallow portion (31) between adjacent pair width groove of secondary circumferential slot (30) from deepest part (32) corresponding to the part crossing secondary circumferential slot (30) with pattern groove laterally outside (40Aout) of secondary circumferential slot (30).

Description

Tire

Technical field

The present invention relates to a kind of tire, this tire includes the fetus face with tread surface.

Background technology

Conventionally, there is known following tire, this tire includes: pair of bead portion, and it is assembled in rim shoulder；Pair of sidewall portion, its outside radially of tire in pair of bead portion is continuous with pair of bead portion；And fetus face, it has the tread surface contacted with road surface.

In such tire, fetus face (tread surface) has multiple circumferential slot circumferentially extending along tire and multiple width groove extended along tire width direction.

Here, multiple circumferential slots comprise main circumferential slot and secondary circumferential slot.Secondary circumferential slot is positioned at the outside of tire width direction relative to main circumferential slot.Multiple width grooves comprise and are communicated in main circumferential slot and the width groove of secondary circumferential slot, are communicated in secondary circumferential slot and arrive the width groove of tyre surface earth terminal.

According to such tire, the width groove arriving tyre surface earth terminal is utilized to ensure that drainage performance (such as, patent documentation 1).

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2006-240592 publication

But, in above-mentioned tire, it is communicated in secondary circumferential slot owing to being formed and arrives the width groove of tyre surface earth terminal, therefore there is the hidden danger that rigidity reduces, control stability reduces of the grounding parts being located at shoulder portion.

On the other hand, in the tire (such as, motor type tire) being installed on SUV etc., not only need to improve drainage performance (wetland performance), in addition it is also necessary to improve abrasion resistance properties and control stability.

Summary of the invention

Therefore, the present invention completes to solve the problems referred to above, its object is to provide one drainage performance (wetland performance) can be suppressed to reduce and can improve the tire of abrasion resistance properties and control stability.

The tire of the 1st technical scheme includes fetus face, and this fetus face has the tread surface contacted with road surface.Above-mentioned fetus face has multiple circumferential slot circumferentially extending along tire and multiple width groove extended along tire width direction in above-mentioned tread surface.Above-mentioned multiple circumferential slot comprises main circumferential slot and is positioned at the secondary circumferential slot in outside of tire width direction relative to above-mentioned main circumferential slot.Above-mentioned multiple width groove crosses above-mentioned secondary circumferential slot.One end of each groove in above-mentioned multiple width groove is communicated in above-mentioned main circumferential slot.Having inclined plane on above-mentioned secondary circumferential slot, this inclined plane is positioned against the end face at the bottom of the secondary circumferential slot between adjacent pair above-mentioned width groove from the bottom land corresponding with the part that above-mentioned width groove crosses this pair circumferential slot of above-mentioned secondary circumferential slot and extends continuously to tilt.

In the 1st technical scheme, the other end of each groove in above-mentioned multiple width grooves does not arrives tyre surface earth terminal, but terminates in tire shoulder grounding parts.

In the 1st technical scheme, the well width of above-mentioned secondary circumferential slot is less than the well width of above-mentioned main circumferential slot, and, at above-mentioned tire radially, the degree of depth of above-mentioned secondary circumferential slot is less than the degree of depth of above-mentioned main circumferential slot.

In the 1st technical scheme, at above-mentioned tire radially, the 40%～55% of the degree of depth that the degree of depth is above-mentioned main circumferential slot of above-mentioned secondary circumferential slot.

In the 1st technical scheme, at above-mentioned tire radially, the degree of depth of above-mentioned multiple width groove is less than the degree of depth of above-mentioned main circumferential slot.

In the 1st technical scheme, in above-mentioned tire circumference, the length of above-mentioned secondary end face at the bottom of circumferential slot is equal with the length of above-mentioned inclined plane.

In the 1st technical scheme, utilization is located at the decorative pattern of the groove composition of above-mentioned fetus face on the basis of tire equator line in asymmetric.When above-mentioned tire is installed on vehicle, above-mentioned secondary circumferential slot is positioned at the position in the outside leaning on vehicle than above-mentioned tire equator line.

In accordance with the invention it is possible to provide one drainage performance (wetland performance) can be suppressed to reduce and the tire of abrasion resistance properties and control stability can be improved.

Accompanying drawing explanation

Fig. 1 is the figure of the tread surface of the tire 1 representing the 1st embodiment.

Fig. 2 is the figure of the secondary circumferential slot 30 representing the 1st embodiment.

Detailed description of the invention

Tire hereinafter, with reference to the accompanying drawings of embodiments of the present invention.Additionally, in the record of the following drawings, the reference same or like to same or like part mark.

But, accompanying drawing is schematically to scheme, it should be noted that the ratio of each size etc. are different with reality.Thus, concrete size etc. should judge with reference to the following description.Additionally, the most also include the part that size relationship each other, ratio are different.

[summary of embodiment]

Tire in embodiment includes fetus face, and this fetus face has the tread surface contacted with road surface.Above-mentioned fetus face has multiple circumferential slot circumferentially extending along tire and multiple width groove extended along tire width direction in above-mentioned tread surface.Above-mentioned multiple circumferential slot comprises main circumferential slot and is positioned at the secondary circumferential slot in outside of tire width direction relative to above-mentioned main circumferential slot.Above-mentioned multiple width groove crosses above-mentioned secondary circumferential slot.One end of each groove in above-mentioned multiple width groove is communicated in above-mentioned main circumferential slot.

Above-mentioned secondary circumferential slot comprises and crosses bottom land position corresponding to the part of this above-mentioned secondary circumferential slot and the end face at the bottom of secondary circumferential slot between adjacent pair above-mentioned width groove with above-mentioned width groove.Here, " bottom land position " refers to the deepest part that the tire degree of depth radially is maximum, and this bottom land position has and is parallel to tyre surface and arranges the plane in face." secondary end face " at the bottom of circumferential slot refers to the shallow portion that the tire degree of depth radially is minimum, and this end face at the bottom of pair circumferential slot has and is parallel to tyre surface and arranges the plane in face.And, there is the inclined plane being positioned against end face continuous tilt at the bottom of secondary circumferential slot from above-mentioned bottom land at above-mentioned secondary circumferential slot.Above-mentioned secondary end face (shallow portion) at the bottom of circumferential slot and above-mentioned bottom land position (deepest part) are alternately repeated in above-mentioned tire circumference across inclined plane.

In embodiments, secondary circumferential slot comprises shallow portion and deepest part, and deepest part is positioned at each of multiple width groove and crosses the part of secondary circumferential slot.That is, cross the deepest part of secondary circumferential slot due to width groove, therefore inhibit drainage performance (wetland performance) to reduce.On the other hand, by being provided with shallow portion, increase the rigidity at the position (that is, shoulder portion) being formed with secondary circumferential slot, therefore, it is possible to improve abrasion resistance properties and control stability.

[the 1st embodiment]

(structure of tire)

Hereinafter, the tire of the 1st embodiment is illustrated.Fig. 1 is the figure of the tread surface of the tire 1 representing the 1st embodiment.

Here, tire 1 has: pair of bead portion, it is assembled in rim flange；Sidewall, the outside of its tire in pair of bead portion radially TR is continuous with pair of bead portion；And fetus face, it has the tread surface contacted with road surface.

Here, as it is shown in figure 1, utilization is located at the decorative pattern of the groove composition of fetus face 10 (tread surface) on the basis of tire equator line CL in asymmetric.Hereinafter, when tire 1 is installed on vehicle, will than tire equator line CL by vehicle outside side be referred to as " vehicle outside ", will than tire equator line CL by vehicle inner side side be referred to as " vehicle interior side ".

It addition, as it is shown in figure 1, represent tyre surface ground connection width with W, represent tyre surface ground contact length with L.Tire 1 is installed on the standard rim of JATMA defined, and the intrinsic pressure standard for JATMA defined of tire 1 is intrinsic pressure, when the 80% of the peak load that load the is JATMA defined load of tire 1, measures tyre surface ground connection width W and tyre surface ground contact length L.

As it is shown in figure 1, tire 1 has fetus face 10, this fetus face 10 has tread surface.Fetus face 10 has central part 10C, shoulder portion 10Sout and shoulder portion 10Sin.It addition, fetus face 10 (tread surface) has multiple main circumferential slot 20, the secondary circumferential slot 30 extended along tire circumference TC and multiple width groove 40 extended along tire width direction TW extended along tire circumference TC in tread surface.

Central part 10C is across the position of tire equator line CL.Central part 10C is not specifically limited, and should be in by the main circumferential slot 20 (external circumferential groove 20out) of vehicle outside and the position between being positioned at main circumferential slot 20 (inner circumferential groove 20in) by vehicle interior side.Central part 10C is along tire circumference TC continuous print position.

Shoulder portion 10Sout is provided at the position of the vehicle outside of central part 10C.Shoulder portion 10Sin is not specifically limited, and should be in by the tyre surface earth terminal 10Eout of vehicle outside and the position between being positioned at main circumferential slot 20 (external circumferential groove 20out) by vehicle outside.Shoulder portion 10Sout is along tire circumference TC continuous print position.

Shoulder portion 10Sin is provided at the position of the vehicle interior side of central part 10C.Shoulder portion 10Sin is not specifically limited, and should be in by the tyre surface earth terminal 10Ein of vehicle interior side and be positioned at by the position between the main circumferential slot 20 (inner circumferential groove 20in) of vehicle interior side.Shoulder portion 10Sin is along tire circumference TC continuous print position.

Multiple main circumferential slots 20 comprise centrally circumferentially groove 20c, external circumferential groove 20out and inner circumferential groove 20in.Centrally circumferentially groove 20c is located at central part 10C.External circumferential groove 20out is positioned at vehicle outside relative to centrally circumferentially groove 20c.Inner circumferential groove 20in is positioned at vehicle interior side relative to centrally circumferentially groove 20c.

Secondary circumferential slot 30 is positioned at the outside of tire width direction TW relative to external circumferential groove 20out.In the 1st embodiment, secondary circumferential slot 30 is positioned at vehicle outside relative to external circumferential groove 20out.

Multiple width grooves 40 comprise central authorities transverse pattern groove 40Ac, central authorities transverse pattern groove 40Bc, laterally outside pattern groove 40Aout, laterally outside pattern groove 40Bout, laterally outside pattern groove 40Cout, inner side transverse pattern groove 40Ain and inner side transverse pattern groove 40Bin.

Central transverse pattern groove 40Ac as a part for multiple width grooves 40 configures in tire circumference TC at a predetermined interval.One end of central authorities transverse pattern groove 40Ac connects with centrally circumferentially groove 20c, and the other end of central authorities transverse pattern groove 40Ac does not arrives external circumferential groove 20out, but terminates in central part 10C (center-point earth portion).

Central transverse pattern groove 40Bc as a part for multiple width grooves 40 configures in tire circumference TC at a predetermined interval.One end of central authorities transverse pattern groove 40Bc connects with inner circumferential groove 20in, and the other end of central authorities transverse pattern groove 40Bc does not arrives centrally circumferentially groove 20c, but terminates in central part 10C (center-point earth portion).

Here, in tire circumference TC, interval preferably and between a pair central authorities transverse pattern groove 40Bc adjacent one another are, the interval between a pair central authorities transverse pattern groove 40Ac adjacent one another are is identical.

The 40Aout of pattern groove laterally outside as a part for multiple width grooves 40 configures in tire circumference TC at a predetermined interval.Pattern groove 40Aout crosses secondary circumferential slot 30 laterally outside.Laterally outside One end of pattern groove 40Aout connects with external circumferential groove 20out, and the other end of pattern groove 40Aout does not arrives tyre surface earth terminal 10Eout laterally outside, but terminates in shoulder portion 10Sout (tire shoulder grounding parts).

Extend along tire width direction and one end arrives the 40Cout of pattern groove laterally outside (the 1st outside width direction groove) and pattern groove 40Bout (the 2nd outside width direction groove) laterally outside of tyre surface earth terminal it addition, comprise in the parts of multiple width grooves 40.

Pattern groove 40Bout configures in tire circumference TC at a predetermined interval laterally outside.One end of pattern groove 40Bout is at tyre surface earth terminal 10Eout opening laterally outside, and the other end of pattern groove 40Bout does not arrives secondary circumferential slot 30 laterally outside, but terminates in shoulder portion 10Sout (tire shoulder grounding parts).

Here, in tire circumference TC, interval preferably and between a pair central authorities transverse pattern groove 40Ac adjacent one another are, the interval between pair of outside transverse pattern groove 40Bout adjacent one another are is identical.

Pattern groove 40Cout configures in tire circumference TC at a predetermined interval laterally outside.One end of pattern groove 40Cout is at tyre surface earth terminal 10Eout opening laterally outside, and the other end of pattern groove 40Cout does not arrives secondary circumferential slot 30 laterally outside, but terminates in shoulder portion 10Sout (tire shoulder grounding parts).

Here, it is preferable that pattern groove 40Cout extends along the extended line direction of pattern groove 40Aout laterally outside laterally outside.In other words, in tire circumference TC, interval preferably and between pair of outside transverse pattern groove 40Cout adjacent one another are, the interval between pair of outside transverse pattern groove 40Aout adjacent one another are is identical.

Pattern groove 40Cout is different from pattern groove 40Bout length on tire width direction laterally outside laterally outside, laterally outside the length of the pattern groove 40Cout length less than pattern groove 40Bout laterally outside.Laterally outside pattern groove 40Bout and laterally outside pattern groove 40Cout be alternately arranged in tire circumference TC.Pattern groove 40Bout is located in tire circumference between adjacent pair pattern groove 40Cout laterally outside i.e., laterally outside, and pattern groove 40Cout is located in tire circumference between adjacent pair pattern groove 40Bout laterally outside laterally outside.

Inner side transverse pattern groove 40Ain as a part for multiple width grooves 40 configures in tire circumference TC at a predetermined interval.One end of inner side transverse pattern groove 40Ain is at tyre surface earth terminal 10Ein opening, and the other end of inner side transverse pattern groove 40Ain does not arrives inner circumferential groove 20in, but terminates in shoulder portion 10Sin (tire shoulder grounding parts).The other end at inner side transverse pattern groove 40Ain is formed with the circumferential siping 50 that the other end from inner side transverse pattern groove 40Ain extends along tire circumference TC.

Here, in tire circumference TC, interval preferably and between a pair central authorities transverse pattern groove 40Bc adjacent one another are, the interval between pair of inside transverse pattern groove 40Ain adjacent one another are is identical.

Inner side transverse pattern groove 40Bin as a part for multiple width grooves 40 configures in tire circumference TC at a predetermined interval.One end of inner side transverse pattern groove 40Bin is at tyre surface earth terminal 10Ein opening, and the other end of inner side transverse pattern groove 40Bin does not arrives inner circumferential groove 20in, but terminates in shoulder portion 10Sin (tire shoulder grounding parts).

Here, on tire width direction TW, the length of the inner side transverse pattern groove 40Bin length less than inner side transverse pattern groove 40Ain.Inner side transverse pattern groove 40Ain and inner side transverse pattern groove 40Bin is alternately arranged in tire circumference TC.

In the 1st embodiment, the well width of secondary circumferential slot 30 is preferably less than the well width of main circumferential slot 20 (centrally circumferentially groove 20c, external circumferential groove 20out and inner circumferential groove 20in).Here, well width is the width on the direction orthogonal with the direction of groove extension.

On tire radially TR, the degree of depth of secondary circumferential slot 30 is preferably less than the degree of depth of main circumferential slot 20 (centrally circumferentially groove 20c, external circumferential groove 20out and inner circumferential groove 20in).In detail, on tire radially TR, it is preferred that the 40%～55% of the degree of depth that the degree of depth is main circumferential slot 20 of secondary circumferential slot 30.At this, comparison for secondary circumferential slot 30 with the degree of depth on tire radially TR of main circumferential slot 20, both can compare by the depth capacity (such as Dmax) of each groove, can also compare with the minimum-depth (such as Dmin) of each groove, it is also possible to the mean depth overall with each groove compares.

On tire radially TR, the degree of depth of pattern groove 40Aout is preferably less than the degree of depth of main circumferential slot 20 (centrally circumferentially groove 20c, external circumferential groove 20out and inner circumferential groove 20in) laterally outside.At this, comparison for pattern groove 40Aout laterally outside with the degree of depth on tire radially TR of main circumferential slot 20, both can compare by the depth capacity of each groove, it is also possible to compare with the minimum-depth of each groove, it is also possible to the mean depth overall with each groove compares.

(structure of secondary circumferential slot)

Hereinafter the secondary circumferential slot of the 1st embodiment is illustrated.Fig. 2 is the pair representing the 1st embodiment The figure of circumferential slot 30.Fig. 2 is the figure representing the A-A section shown in Fig. 1.

As in figure 2 it is shown, secondary circumferential slot 30 comprises the deepest part (secondary bottom land position at the bottom of circumferential slot) 32 that the degree of depth in the minimum shallow portion of the degree of depth on tire radially TR (secondary end face at the bottom of circumferential slot) 31 and tire radially TR is maximum.Shallow portion 31 and deepest part 32 is alternately repeated in tire circumference TC.

Shallow portion 31 is in the end face at the bottom of secondary circumferential slot between pair of outside transverse pattern groove 40Aout adjacent one another are in tire circumference TC.Deepest part 32 is to cross the bottom land position that the part of secondary circumferential slot 30 is corresponding with multiple 40Aout of pattern groove laterally outside.

In the 1st embodiment, secondary circumferential slot 30 has the bottom land from deepest part 32 continuously to end face (or the referred to as bottom land of the shallow portion 31 the most adjacent with deepest part 32.) inclined plane 33.In tire circumference TC, length L1 of shallow portion 31 is preferably roughly equal with length L2 of inclined plane 33.Water is inhibited to reduce from the flowing (that is, drainage performance) of secondary circumferential slot 30 transverse pattern groove 40Aout laterally and inhibit the rigidity at the position (that is, shoulder portion 10Sout) being formed with secondary circumferential slot 30 to reduce thereby, it is possible to take into account.It addition, also be able to guarantee the aqueous phase flowing for tire circumference TC in secondary circumferential slot 30.

(effect and effect)

In the 1st embodiment, secondary circumferential slot 30 comprises shallow portion 31 and deepest part 32, and each groove that deepest part 32 is positioned in multiple 40Aout of pattern groove laterally outside crosses the position of the part of secondary circumferential slot 30.That is, cross the deepest part 32 of secondary circumferential slot 30 due to pattern groove 40Aout laterally outside, therefore inhibit drainage performance (wetland performance) to reduce.On the other hand, by being provided with shallow portion 31, increase the rigidity at the position (that is, shoulder portion 10Sout) that secondary circumferential slot 30 is formed, therefore, it is possible to improve abrasion resistance properties and control stability.

In the 1st embodiment, the other end of pattern groove 40Aout does not arrives tyre surface earth terminal 10Eout laterally outside, but terminates in shoulder portion 10Sout (tire shoulder grounding parts).Thus, the rigidity at the position (that is, shoulder portion 10Sout) that pattern groove 40Aout is formed laterally outside increases further, therefore, it is possible to improve abrasion resistance properties and control stability further.

In the 1st embodiment, owing to the well width of secondary circumferential slot 30 is less than the well width of main circumferential slot 20, The degree of depth of secondary circumferential slot 30 less than the degree of depth of main circumferential slot 20, therefore inhibits the rigidity at the position (that is, shoulder portion 10Sout) that secondary circumferential slot 30 formed to reduce.

In the 1st embodiment, owing to the degree of depth of pattern groove 40Aout laterally outside is less than the degree of depth of main circumferential slot 20, the rigidity at the position (that is, shoulder portion 10Sout) that pattern groove 40Aout is formed laterally outside is therefore inhibited to reduce.

[other embodiment]

Utilize above-mentioned embodiment to illustrate the present invention, but should not be construed as constituting the discussion of a part for the disclosure and accompanying drawing defines the present invention.It is readily apparent that those skilled in the art can draw various replacement embodiment, embodiment and application technology according to the disclosure.

In embodiments, exemplified with utilization be located at fetus face 10 (tread surface) groove constitute decorative pattern on the basis of tire equator line CL in asymmetrical situation.But, embodiment is not limited to this.Such as, the decorative pattern utilizing the groove being located at fetus face 10 (tread surface) to constitute can also on the basis of tire equator line CL symmetrically.In this case, owing to there is not the difference of vehicle interior side and vehicle outside, as long as therefore secondary circumferential slot 30 is located at shoulder portion.

In embodiments, the bottom land of secondary circumferential slot 30 is made up of the bottom land of shallow portion 31, the bottom land of deepest part 32 and inclined plane 33, and trapezoidal along the radial section of tire circumference.In other words, the most trapezoidal shape of bottom land of secondary circumferential slot 30 is heaved.But, embodiment is not limited to this.Such as, the bottom land of secondary circumferential slot 30 can also be the wavy shape along tire circumference TC.

Additionally, write present specification by referring to by the full content of Japan's patent application 2013-177867 (application on August 29th, 2013).

Claims

1. a tire, it includes fetus face, and this fetus face has the tread surface contacted with road surface, It is characterized in that,

Above-mentioned fetus face have in above-mentioned tread surface multiple circumferential slot circumferentially extending along tire, with And multiple along tire width direction extend width groove,

Above-mentioned multiple circumferential slot comprises main circumferential slot and is positioned at tyre width relative to above-mentioned main circumferential slot The secondary circumferential slot in the outside in direction,

Above-mentioned multiple width groove crosses above-mentioned secondary circumferential slot,

One end of each groove in above-mentioned multiple width groove is communicated in above-mentioned main circumferential slot,

Above-mentioned secondary circumferential slot has inclined plane, this inclined plane from above-mentioned secondary circumferential slot with above-mentioned width The bottom land that direction groove crosses the part of this pair circumferential slot corresponding is positioned against being positioned at the above-mentioned width of adjacent pair The end face at the bottom of secondary circumferential slot between the groove of degree direction extends continuously to tilt,

Above-mentioned secondary end face at the bottom of circumferential slot and above-mentioned bottom land position across above-mentioned inclined plane at above-mentioned tire It is alternately repeated in circumference,

In above-mentioned tire circumference, the length of above-mentioned secondary end face at the bottom of circumferential slot and the length of above-mentioned inclined plane Equal.

Tire the most according to claim 1, it is characterised in that

The other end of each groove in above-mentioned multiple width groove does not arrives tyre surface earth terminal, but at tire Terminate in shoulder grounding parts.

Tire the most according to claim 1, it is characterised in that

The well width of above-mentioned secondary circumferential slot is less than the well width of above-mentioned main circumferential slot, and, at above-mentioned tire Radially, the degree of depth of above-mentioned secondary circumferential slot is less than the degree of depth of above-mentioned main circumferential slot.

Tire the most according to claim 3, it is characterised in that

At above-mentioned tire radially, the 40% of the degree of depth that the degree of depth is above-mentioned main circumferential slot of above-mentioned secondary circumferential slot ～55%.

Tire the most according to claim 3, it is characterised in that

At above-mentioned tire radially, the degree of depth of above-mentioned multiple width groove is less than the deep of above-mentioned main circumferential slot Degree.

Tire the most according to claim 1, it is characterised in that

Utilization is located at the decorative pattern of the groove composition of above-mentioned fetus face on the basis of tire equator line in asymmetric,

When above-mentioned tire is installed on vehicle, above-mentioned secondary circumferential slot is positioned at than above-mentioned tire equator line Position by the outside of vehicle.