CN204674304U

CN204674304U - Air-inflation tyre

Info

Publication number: CN204674304U
Application number: CN201520347491.7U
Authority: CN
Inventors: 林信太郎
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2014-05-28
Filing date: 2015-05-26
Publication date: 2015-09-30
Anticipated expiration: 2025-05-26
Also published as: CN105313601B; JP2016005943A; CN105313601A; WO2015182022A1; JP6450140B2

Abstract

The purpose of this utility model is that provide a kind of achieves drainage and the air-inflation tyre turning to initial responsibility simultaneously.Air-inflation tyre of the present utility model has many circumferential major troughs in tread surface, described many circumferential major troughs and tyre surface end is utilized to mark off multiple grounding parts, two grounding parts adjacent outside the tread width direction of the described circumferential major trough with the position be configured near tire equator face have many tippers tilting to extend to tread width direction, described tipper is that the second groove that the first groove is less than the groove width of described first groove with groove width is communicated with, described first groove is communicated with described circumferential major trough, and described tipper ends in described grounding parts.

Description

Air-inflation tyre

Technical field

The utility model relates to a kind of air-inflation tyre.

Background technology

In the past, in order to improve the drainage of tire, the tread surface of tire was provided with multiple groove.But, if make the number of groove increase, although then drainage improve, exist grounding parts rigidity reduce and driving stability, deceleration and stopping performance reduce such problem.On the other hand, if the number of groove is very few, although then the rigidity of grounding parts improves and driving stability, deceleration and stopping performance improve, exist drainage reduce and the rainy day time turning performance, deceleration and stopping performance reduce such problem.Like this, be generally difficult to realize drainage and driving stability simultaneously.

To this, propose a kind of mode be communicated with the tipper making groove width different in tread surface and configure the different tipper of groove width to seek the method (for example, referring to patent documentation 1) of the rigidity realizing drainage and grounding parts simultaneously.

Prior art document

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2013-173521 publication

Utility model content

The problem that utility model will solve

But, in the technology described in patent documentation 1, even if in driving stability, initial responsibility is turned to also to be insufficient, even if start to beat bearing circle, the reaction of vehicle is also comparatively slow, therefore dynamic poor, and due to the reaction of vehicle comparatively slow, therefore exist and excessively beat bearing circle thus the such problem of the craspedodrome bad stability of vehicle.

The utility model is the technology that will solve the problem, and its object is to provide a kind of and achieves drainage and the air-inflation tyre turning to initial responsibility simultaneously.

For the scheme of dealing with problems

Purport structure of the present utility model as described below.

Of the present utility modelly airtyredly to be characterised in that, this air-inflation tyre has many circumferential major troughs in tread surface, utilizes described many circumferential major troughs and tyre surface end to mark off multiple grounding parts,

Two grounding parts adjacent outside the tread width direction of the described circumferential major trough with the position be configured near tire equator face have many tippers tilting to extend to tread width direction,

Described tipper is that the second groove that the first groove is less than the groove width of described first groove with groove width is communicated with,

Described first groove is communicated with described circumferential major trough,

Described tipper ends in described grounding parts.

Adopt this structure, drainage can be realized simultaneously and turn to initial responsibility.

At this, " groove width " refer to tire is installed on applicable wheel rim and fill pressure in regulation, the A/F relative to tread surface when being set to no-load condition, in the inconstant situation of groove width, refer to maximum width.In addition, " groove depth " described later, " the tire sipe degree of depth " refer to the extreme depth of groove under equal state, tire sipe.

In addition, " to be suitable for wheel rim " and to refer in the region of tire production, use in actv. industry standards, Japan be JATMA (Japanese car tire association) YEAR BOOK, be ETRTO (European Tyre and Rim Technical Organization: European tyre Rim Technical Organisation) STANDARDS MANUAL in Europe, the wheel rim of regulation in the U.S. is TRA (THE TIRE and RIM ASSOCIATIONINC.: tyre rim association) YEAR BOOK etc.And " regulation in pressure " refers to and tire is being installed on the air pressure corresponding with the tire maximum load capability of the standard such as JATMA in the tire being suitable for wheel rim, suitable dimensions (most high air pressure).

At this, in air-inflation tyre of the present utility model, preferably, there is in the end of described second groove, same contrary with that side that described first groove is communicated with side the circumferential tire sipe extended along tyre surface circumference,

There is at the both ends of described circumferential tire sipe Width tire sipe respectively that extend along tread width direction.

Adopt this structure, can Hoist braking performance.

In addition, in air-inflation tyre of the present utility model, preferably, described Width tire sipe is communicated with described circumferential major trough,

Described Width tire sipe tilts to extend relative to tread width direction.

Adopt this structure, drainage can be improved further and also can improve noise performance.

In addition, in air-inflation tyre of the present utility model, preferably, described circumferential tire sipe extends relative to tyre surface peripheral, oblique.

Adopt this structure, drainage can be promoted further.

In addition, in air-inflation tyre of the present utility model, preferably, there is in the end of described second groove, same contrary with that side that described first groove is communicated with side the circumferential tire sipe extended along tyre surface circumference,

In the end of the tyre surface circumference side of described circumferential tire sipe, there is the Width tire sipe extended along tread width direction, in the end of the tyre surface circumference opposite side of described circumferential tire sipe, there is the narrow groove of Width extended along tread width direction.

Adopt this structure, drainage can be promoted further.

In addition, in air-inflation tyre of the present utility model, preferably, described tipper and described Width tire sipe are alternately configured at circumference.

In addition, in air-inflation tyre of the present utility model, preferably, two the described Width tire sipes being positioned at a tread width direction half portion centered by tire equator face all inside tread width direction toward the outside the same side of lateral tread circumference tilt to extend.

In addition, in air-inflation tyre of the present utility model, preferably, the groove depth of described first groove is darker than the groove depth of described second groove.

In addition, in air-inflation tyre of the present utility model, preferably, the connecting part between described first groove and described second groove has overlooks bending part.

In addition, in air-inflation tyre of the present utility model, preferably, a cell wall of described first groove is formed in the mode of the cell wall extending described second groove, and another cell wall of described first groove makes the groove width of described first groove become large and be formed with bight.

In addition, in air-inflation tyre of the present utility model, preferably, described bight bends.

In addition, in air-inflation tyre of the present utility model, preferably, with in described grounding parts, adjacent with described tyre surface end outside lug is configured with many translots extended inside tread width direction from described tyre surface end, described translot is not communicated with described circumferential major trough, but ends in described outside lug.

In addition, in air-inflation tyre of the present utility model, preferably, 1 Width tire sipe is configured with between described translot.

In addition, in air-inflation tyre of the present utility model, preferably, described air-inflation tyre is configured with and extends inside tread width direction from the Width medial end of described translot and to end at the Width tire sipe in described outside lug.

In addition, in air-inflation tyre of the present utility model, preferably, the circumferential tire sipe extended along tyre surface circumference is configured with at the tread width direction medial end of described outside lug, described Width tire sipe.

In addition, in air-inflation tyre of the present utility model, preferably, the narrow groove of described Width comprises the tire sipe part that is communicated with described circumferential tire sipe and has carried out the chamfered part of chamfering in the mode making the degree of depth deepen towards this tire sipe part.

In addition, in air-inflation tyre of the present utility model, preferably, the groove width of the end of that side be communicated with described circumferential tire sipe of the narrow groove of described Width is thinner than the groove width of other parts of the narrow groove of described Width.

The effect of utility model

According to the utility model, can provide a kind of and achieve drainage and the air-inflation tyre turning to initial responsibility simultaneously.

Accompanying drawing explanation

Fig. 1 is the expansion drawing of the tread contour representing an embodiment of the present utility model.

Fig. 2 is the expansion drawing of the tread contour representing another embodiment of the present utility model.

Fig. 3 is the expansion drawing of the tread contour representing another embodiment of the present utility model.

Description of reference numerals

1 tread surface; 2,2a, 2b circumference major trough; 3 grounding parts; 3a center-point earth portion; 3b outside lug; 3c center-point earth portion; 3d middle ground portion; 3e outside lug; 4 tippers; 4a first groove; 4b second groove; 5 circumferential tire sipes; 6 Width tire sipes; 7 Width tire sipes; 8 translots; 9 Width tire sipes; 10 Width tire sipes; 11 circumferential tire sipes; 12 central tippers; 13 central Width tire sipes; The narrow groove of 14 Width; The narrow groove of 15 Width.

Detailed description of the invention

Below, embodiment of the present utility model is illustrated in detail with reference to accompanying drawing.

Fig. 1 is the expansion drawing of the tread contour representing an embodiment of the present utility model, be launch to represent air-inflation tyre (following, also referred to as tire) is installed on be suitable for wheel rim and fill pressure in regulation, the figure of tread surface when being set to no-load condition.

As shown in Figure 1, this tire has many (being 3 in illustrated example) circumferential major troughs 2 in tread surface 1.In illustrated example, this tire has the circumferential major trough 2a that extends on the CL of tire equator face and is respectively configured with the circumferential major trough 2b of in its monosymmetric position, tread width direction in tread surface 1.And, multiple (being 4 in illustrated example) grounding parts 3a, the 3b that utilized 3 circumferential major troughs 2 and tyre surface end TE to mark off.That is, this tire have with the tread width direction of the circumferential major trough 2a configured on the CL of tire equator face outside adjacent two center-point earth portion 3a and two the outside lug 3bs adjacent with tyre surface end TE.

In addition, as shown in Figure 1, this tire has many tippers 4 tilting to extend to tread width direction at center-point earth portion 3a.To be first groove 4a be connected with the second groove 4b as the groove width narrow groove less than the groove width of the first groove 4a tipper 4, and tipper 4 extends from circumferential major trough 2b and ends in center-point earth portion 3a inside tread width direction.That is, the first groove 4a is communicated with circumferential major trough 2a, and the second groove 4b ends in center-point earth portion 3a.

Below, the action effect of present embodiment is described.

Tire according to the present embodiment, first, because tipper 4 ends in center-point earth portion 3a, therefore, it is possible to guarantee the rigidity of center-point earth portion 3a.Because this center-point earth portion 3a is the grounding parts being positioned at ground connection central portion, therefore particularly turn to initial responsibility to improve, can driving stability be improved.And, because tipper 4 comprises the first groove 4a and the second groove 4b, the first groove 4a making groove width larger is connected with circumferential major trough 2a, therefore, it is possible to improve drainage efficiently, and because the groove width of the second groove 4b is less, the rigidity of center-point earth portion 3a therefore also can be guaranteed.

Thus, tire according to the present embodiment, can realize drainage simultaneously and turn to initial responsibility.

And, as shown in Figure 1, in the utility model, preferably, there is in the end of the second groove 4b, same contrary with that side that the first groove 4a is communicated with side the circumferential tire sipe 5 extended along tyre surface circumference, there is at the both ends of circumferential tire sipe 5 Width tire sipe 6,7 respectively that extend along tread width direction.In illustrated example, tipper 4 and Width tire sipe 6 alternately configure in tyre surface circumference.In addition, tipper 4 and Width tire sipe 7 alternately configure in tyre surface circumference.And in illustrated example, the one end inside the tread width direction of tipper 4 is communicated with circumferential tire sipe 5.

This is because, by making tipper 4 misplace in tyre surface circumference with the position of Width tire sipe 6,7, grounding parts lodging in front-rear direction can be suppressed, can deceleration and stopping performance be improved.

In addition, as shown in Figure 1, preferably, Width tire sipe 6,7 is communicated with circumferential major trough 2b, 2a respectively, and Width tire sipe 6,7 tilts to extend relative to tread width direction.In illustrated example, both the Width tire sipes 6,7 being positioned at a tread width direction half portion centered by the CL of tire equator face all inside tread width direction toward the outside the same side (side) of lateral tread circumference tilt to extend (but, when observing for starting point with the interconnecting part between circumferential tire sipe 5, Width tire sipe 6,7 extends to the opposition side in tread width direction mutually).On the other hand, both the Width tire sipes 6,7 being positioned at another tread width direction half portion centered by the CL of tire equator face all inside tread width direction toward the outside the same side (opposite side) of lateral tread circumference tilt to extend.

This is because, by making the terminal part of tipper 4 be communicated with circumferential major trough 2a, 2b with Width tire sipe 6,7 via circumferential tire sipe 5, drainage can be improved further.

And this is because, by making Width tire sipe tilt relative to tread width direction, runner sound can be reduced and improve noise performance.

And then as shown in Figure 1, preferably, circumferential tire sipe 5 extends relative to tyre surface peripheral, oblique.This is that drainage improves further in order to make water be easy to discharge outside tread width direction from ground connection central portion.

In addition, preferably, be connected to circumferential major trough 2a and be positioned at and mutually stagger in tyre surface circumference each other setting with the Width tire sipe 7 of the tread width direction half portion of the tire equator face CL opposition side that is border.This is to reduce pattern noise.

At this, in the utility model, preferably, the number of circumferential major trough 2 is set to more than 3.And in the example depicted in figure 1, circumferential major trough 2 is linearities, but also can be zig-zag, bending shape.

And about tipper 4, consider the balance between drainage and the rigidity of grounding parts, the groove width of the first groove 4a is preferably set to 3mm ~ 7mm, and groove depth is preferably set to 4mm ~ 8mm.In addition, consider the balance between drainage and the rigidity of grounding parts, the groove width of the second groove 4b is preferably set to 2mm ~ 4mm, and groove depth is preferably set to 3mm ~ 6mm.

Consider for the viewpoint seeking to realize rigidity and drainage simultaneously, preferably, make the groove depth of the first groove 4a darker than the groove depth of the second groove 4b.

And the angle of inclination relative to tread width direction of tipper 4 is preferably set to 5 ° ~ 40 °.This is because, by being set to more than 5 °, can noise performance being guaranteed, on the other hand, by being set to less than 40 °, can drainage performance be guaranteed.In addition, " angle of inclination " refers to the angle of inclination of the line segment at the two ends of the groove center line (linking the line of the mid point of groove width) linking groove, and other angles of inclination are identical setting also.

In addition, as shown in the figure, the connecting part between the first groove 4a and the second groove 4b has overlooks bending part.That is, in illustrated example, a cell wall of the first groove 4a is formed in the mode of the cell wall extending the second groove 4b, and another cell wall of the first groove 4a makes the groove width of the first groove 4a become large and be formed with bight, but this bight bends.

Then, preferably, circumferential tire sipe 5 is circumferential relative to tyre surface with the angular slope of 5 ° ~ 15 °.This is because by with the angular slope of more than 5 °, thus water is easy to discharge outside tread width direction from ground connection central portion, on the other hand, by with the angular slope of less than 15 °, can ensure the rigidity of fore-and-aft direction, can improve deceleration and stopping performance.

In addition, preferably, Width tire sipe 6,7 extends with the angular slope of 10 ° ~ 50 ° relative to tread width direction.This is because, by being set to more than 10 °, runner sound can being reduced and improve noise performance, on the other hand, by being set to less than 50 °, the edge pressure of Width tire sipe 6,7 can be improved, the effect removing moisture film can be improved, can drainage be improved.

Then, outside lug 3b is described.

First, outside lug 3b is configured with many translots 8 extended inside tread width direction from tyre surface end TE.This translot 8 is not communicated with circumferential major trough 2b to suppress the abrasion of heel toe, but ends in outside lug 3b.

In addition, between each translot 8, a Width tire sipe 9 is configured with.Because this Width tire sipe 9 is communicated with tyre surface end TE with circumferential major trough 2b, therefore, it is possible to improve drainage.On the other hand, not utilize translot 8, but by configuration Width tire sipe 9, thus the rigidity of grounding parts can be guaranteed and guarantee driving stability etc.

In addition, be configured with at outside lug 3b and extend inside tread width direction from the Width medial end of translot 8 and to end at the Width tire sipe 10 in outside lug 3b.In addition, in illustrated example, Width tire sipe 10 ends in outside lug 3b in order to ensure the rigidity of outside lug 3b, but also can be communicated with circumferential major trough 2b to improve drainage.

And, the circumferential tire sipe 11 extended along tyre surface circumference is configured with at the tread width direction medial end of Width tire sipe 10.Utilize this circumferential tire sipe 11, can moderately reduce the compression rigidity of this part and improve travelling comfort.In addition, the development length of circumferential tire sipe 11 can be utilized to adjust rigidity.Or, in the utility model, Width tire sipe 10 and circumferential tire sipe 11 also can not be set.

At this, consider the balance between drainage and the rigidity of grounding parts, the groove width of translot 8 is preferably set to 3mm ~ 7mm, and groove depth is preferably set to 3mm ~ 7mm.In addition, translot 8 for guarantee drainage viewpoint consider and preferably relative to tread width direction with the angular slope of less than 30 °.

In addition, the groove width of Width tire sipe 9 is preferably set to 0.5mm ~ 1.4mm, and the tire sipe degree of depth is preferably set to 2mm ~ 6mm.And, Width tire sipe 9 for guarantee drainage viewpoint consider and preferably relative to tread width direction with the angular slope of less than 30 °.

And the groove width of Width tire sipe 10 is preferably set to 0.5mm ~ 1.4mm, the tire sipe degree of depth is preferably set to 2mm ~ 6mm.

And the groove width of circumferential tire sipe 11 is preferably set to 0.3mm ~ 1.1mm, and the tire sipe degree of depth is preferably set to 2mm ~ 6mm.

Then, Fig. 2 is the expansion drawing of the tread contour representing another embodiment of the present utility model, be launch to represent tire is installed on be suitable for wheel rim and fill pressure in regulation, the figure of tread surface when being set to no-load condition.

Tire shown in Fig. 2 is first different from the tire shown in Fig. 1 in following this point: in tread surface 1, have 4 circumferential major troughs 2, and utilizes this circumferential major trough 2 and tyre surface end TE to mark off 5 grounding parts 3c, 3d, 3e.

Specifically, as shown in Figure 2, a center-point earth portion 3c has been marked off being configured between two circumferential major trough 2a near the position of tire equator face CL.In illustrated example, this center-point earth portion 3c is positioned on the CL of tire equator face.In addition, utilize to be configured in and marked off two middle ground portion 3d near two circumferential major trough 2a of the position of tire equator face CL and two circumferential major trough 2b adjacent outside the tread width direction of this circumferential major trough 2a.And, utilize this circumferential major trough 2b and tyre surface end TE to mark off two outside lug 3e.

As shown in Figure 2, be formed with at center-point earth portion 3c that one end is communicated with circumferential major trough 2a, the other end is not crossed over tire equatorial plane CL and resided in center-point earth portion 3c, many central tippers 12.These central tippers 12 are alternately formed between the tread width direction half portion centered by the CL of tire equator face, and tilt to extend from the opposite sense towards inner side mutually to tyre surface circumference between the half portion of tread width direction outside tread width direction.In addition, have that one end is communicated with central tipper 12 at center-point earth portion 3c, the other end is communicated with the circumferential major trough 2a of the tread width direction half portion with the contrary side of this central tipper 12, many central Width tire sipes 13.In illustrated example, if with the connected component between central Width tire sipe 13 and central tipper 12 for starting point is observed, then central Width tire sipe 13 extends with the same direction of central tipper 12 to tyre surface circumference, and extends to the side opposite each other in tread width direction.

And, in illustrated example, utilize this circumferential major trough 2a, central tipper 12, central Width tire sipe 13 to mark off the grounding parts of almost parallel quadrilateral shape.

At this, as shown in Figure 2, the development length in the tread width direction of central tipper 12 is less than 50% of the width in the tread width direction of center-point earth portion 3c, and center-point earth portion 3c is formed as the grounding parts of ribbed.Thus, the rigidity in center-point earth portion is higher, can guarantee driving stability.

In addition, consider the balance between drainage and the rigidity of grounding parts, the groove width of central tipper 12 is preferably set to 2mm ~ 5mm, and in addition, the angle of inclination relative to tread width direction of central tipper 12 is preferably set to 5 ° ~ 50 °.

And the groove width of central Width tire sipe 13 is preferably set to 0.5mm ~ 1.0mm, and the tire sipe degree of depth is preferably set to 1.5mm ~ 6mm.And, preferably, central Width tire sipe 13 relative to tread width direction with the angular slope of less than 40 °.In addition, central Width tire sipe 13 is configured to the position of the tyre surface circumference that preferably staggers with other grooves, tire sipe for the viewpoint consideration of minimizing pattern noise.

In addition, the viewpoint for the rigidity improving grounding parts is considered, also can be set to the structure not arranging groove, tire sipe at center-point earth portion 3c.

Then, the middle ground portion 3d of the embodiment shown in Fig. 2 is formed as the structure identical with the center-point earth portion 3a of the embodiment shown in Fig. 1.Thus, the action effect identical with the tire shown in above-mentioned Fig. 1 can be played.

And the outside lug 3e of the embodiment shown in Fig. 2 is formed as the structure identical with the outside lug 3b of the embodiment shown in Fig. 1.Thus, the action effect identical with the tire shown in above-mentioned Fig. 1 can be played.

The tire of the embodiment shown in Fig. 1 is the decorative pattern with 3 circumferential major troughs 2, therefore, it is possible to guarantee the rigidity of the grounding parts 3 utilizing these circumferential major troughs 2 to divide.Thus, although be not particularly limited, be in the tire of below 195mm at the section width of tire, by being set to the decorative pattern shown in Fig. 1, when can guarantee particularly to turn, lane change time driving stability.In addition, as long as the tire of this section width, namely use 3 major troughs also can guarantee drainage fully.

On the other hand, the tire of the embodiment shown in Fig. 2 is the tire of the decorative pattern with 4 circumferential major troughs 2, even if therefore in the tire that tire section widht is larger, also can guarantee drainage fully.In addition, in the decorative pattern shown in Fig. 2, although grounding parts is divided into 5, in the tire that tire section widht is larger, the rigidity of grounding parts can be guaranteed fully, can guarantee turn time, lane change time driving stability.Thus, although be not particularly limited, the section width about tire is the tire of more than 225mm, preferably the decorative pattern shown in application drawing 2.

Fig. 3 is the expansion drawing of the tread contour representing another embodiment of the present utility model.Tire shown in Fig. 3 is first different from the tire of the embodiment shown in Fig. 1 in following this point: the end of the side contrary in the second groove 4b, same that side be communicated with the first groove 4a has the circumferential tire sipe 5 extended along tyre surface circumference, in the end of the tyre surface circumference side of circumferential tire sipe 5, there is the Width tire sipe 7 extended along tread width direction, in the end of the tyre surface circumference opposite side of circumferential tire sipe 7, there is the narrow groove 14 of Width extended along tread width direction.

At this, the narrow groove of Width 14 comprises the tire sipe part 14a be communicated with circumferential the tire sipe 5 and chamfered part 14b having carried out chamfering in the mode making the degree of depth deepen towards this tire sipe part 14a.In the present embodiment, chamfered part 14b is the shape of taper, but also can be set to inside tire or outside there is the bending shape of the mode of center of curvature.

In addition, the viewpoint improved for ground connection property is considered, the groove width of the narrow groove 14 of Width is preferably set to 2mm ~ 4mm.

In addition, in the tire of the embodiment shown in Fig. 3, also different from the tire of the embodiment shown in Fig. 1 in following this point: to be configured with at outside lug 3b and to extend inside tread width direction from the Width medial end of translot 8 and to end at the narrow groove 15 of Width in outside lug 3b.In addition, in illustrated example, the narrow groove 15 of Width ends in outside lug 3b in order to ensure the rigidity of outside lug 3b, but also can be communicated with circumferential major trough 2b to improve drainage.

At this, the narrow groove of Width 15 comprises the tire sipe part 15a be communicated with circumferential the tire sipe 11 and chamfered part 15b having carried out chamfering in the mode making the degree of depth deepen towards this tire sipe part 15a.In the present embodiment, chamfered part 15b is the shape of taper, but also can be set to inside tire or outside there is the bending shape of the mode of center of curvature.

In addition, consider for the viewpoint improving ground connection property, the groove width of the narrow groove 15 of Width is preferably set to 30% ~ 50% of the groove width of translot 8.

In addition, be narrow groove relative to the second groove 4b in the embodiment shown in Fig. 1, Fig. 2, in the embodiment shown in Fig. 3, the second groove 4b comprises the tire sipe part 4b1 of such shape that to be in line with the sidewall of the side of the first groove 4a and has carried out the chamfered part 4b2 of chamfering in the mode making the degree of depth deepen towards this tire sipe part 4b1 when it is overlooked.In the present embodiment, chamfered part 4b2 is the shape of taper, but also can be set to inside tire or outside there is the bending shape of the mode of center of curvature.

And, in illustrated example, be configured with the circumferential tire sipe 11 extended along tyre surface circumference at the tread width direction medial end of the narrow groove of Width 15.Utilize this circumferential tire sipe 11, can moderately reduce the compression rigidity of this part and improve travelling comfort.In addition, the development length of circumferential tire sipe 11 can be utilized to adjust rigidity.

The tire of the embodiment according to Fig. 3, first, the tire of the embodiment shown in basic structure with Fig. 1 is identical, therefore, it is possible to play above-mentioned, identical with the tire of the embodiment shown in Fig. 1 action effect.

And, in the tire of the embodiment shown in Fig. 3, in center-point earth portion 3a, in the end of the tyre surface circumference opposite side of circumferential tire sipe 7, there is the narrow groove 14 of Width extended along tread width direction, therefore, compared with the tire of the embodiment shown in Fig. 1, drainage improves further.In addition, also be configured with at side grounding parts 3b and extend inside tread width direction from the Width medial end of translot 8 and to end at the narrow groove 15 of Width in outside lug 3b, therefore, compared with the tire of the embodiment shown in Fig. 1, drainage improves further.

In addition, as shown in Figure 3, preferably, the groove width of the end of that side be communicated with circumferential tire sipe 5 of the narrow groove of Width 14 is thinner than the groove width of other parts of the narrow groove of Width 14.This is to prevent strain from concentrating.

And in the embodiment shown in Fig. 3, preferably, the groove width of the narrow groove 14 of Width is greater than the groove width of the second groove.This is to further guarantee drainage.

[embodiment]

In order to effect clearly of the present utility model, the tire of trial-production embodiment 1 ~ embodiment 5 and the tire of comparative example 1,2, carry out the test evaluating tyre performance.

Each specification table of each tire shows in the following table 1.

In addition, in Table 1, " angle of inclination of Width tire sipe 6,7 " refers to the angle of inclination relative to tread width direction, and " angle of inclination of circumferential tire sipe 5 " refers to the angle of inclination relative to tyre surface circumference.In addition, " having skew " refers to Width tire sipe 7 not on the extended line of tipper 4, but along tyre surface circumferential offset.

In addition, embodiment 1 ~ embodiment 4 and comparative example 1 are the tires of the decorative pattern with 3 circumferential major troughs 2, and on the other hand, embodiment 5 and comparative example 2 are tires of the decorative pattern with 4 circumferential major troughs 2.

Each tire above-mentioned of tire size 195/65R15 is embedded and is suitable for wheel rim, and fill pressure in regulation, carry out following test.

< drainage >

The wet road of depth of water 7mm is accelerated, compares the generation speed of hydroplaning phenomenon, evaluate drainage.

Evaluation utilizes the relative value when evaluation result of the tire of comparative example 1 being set to 100 to carry out index assessment, and numerical value is large, represents that drainage is excellent.

< turns to initial responsibility >

Carry out the sense evaluation of chaufeur.The relative value when evaluation result of the tire of comparative example 1 is set to 100 by evaluation ideas carries out index assessment, and numerical value is large, represents and turns to initial responsibility good.

< noise performance >

Carry out the sense evaluation of chaufeur.The relative value when evaluation result of the tire of comparative example 1 is set to 100 by evaluation ideas carries out index assessment, and numerical value is large, represents that noise performance is excellent.

< deceleration and stopping performance >

Make vehicle from emergency braking during initial velocity 20km/.Then, measuring vehicle, until the stopping distance of quiescence, evaluates deceleration and stopping performance according to this stopping distance.The relative value when evaluation result of the tire of comparative example 1 is set to 100 by evaluation ideas carries out index assessment, and numerical value is large, represents that deceleration and stopping performance is excellent.

These evaluation results are represented in the following table 1 together with each specification of tire.

[table 1]

Embodiment 1

Embodiment 2

Embodiment 3

Embodiment 4

Comparative example 1

Embodiment 5

Comparative example 2

Figure

Fig. 1

-

Fig. 2

-

Tipper 4 and circumferential major trough 2a

Be not communicated with

Be communicated with

Be not communicated with

Be communicated with

With or without circumferential tire sipe 5

Have

Nothing

Have

With or without Width tire sipe 6,7

Have

Tipper 4 and Width tire sipe 7

There is skew

On extended line

There is skew

Width tire sipe 6,7 and circumferential major trough 2

Be communicated with

Be not communicated with

Be communicated with

The angle of inclination of Width tire sipe 6,7

10°

0°

10°

The angle of inclination of circumference tire sipe 5

5°

-

5°

0°

5°

Drainage

105

102

101

104

100

103

102

Turn to initial responsibility

108

104

108

107

100

97

Noise performance

106

102

106

100

101

97

Deceleration and stopping performance

106

100

106

107

100

102

100

As shown in table 1, the tire of known embodiment 1 ~ embodiment 4 compared with the tire of comparative example 1, all can realize simultaneously drainage with turn to initial responsibility.In addition, more known by between embodiment 1 with embodiment 2, has circumferential tire sipe 5 and the deceleration and stopping performance of Width tire sipe 7 not on the extended line of tipper 4 but along the embodiment 1 of tyre surface circumferential offset is more excellent than the deceleration and stopping performance of embodiment 2.And, more known by between embodiment 1 with embodiment 3, Width tire sipe 6,7 be communicated with circumferential major trough 2 and the drainage of embodiment 1 that tilts relative to tread width direction of Width tire sipe 6,7 and noise performance than the drainage of embodiment 3 and noise performance more excellent.And more known by between embodiment 1 with embodiment 4, circumferential tire sipe 5 is more excellent than the drainage of embodiment 4 relative to the drainage of the embodiment 1 of tyre surface peripheral, oblique.In addition, the tire of embodiment 5 is known compared with the tire of comparative example 2, can realize drainage simultaneously and turn to initial responsibility.

Then, about the tire of tire size 235/40R17, the tire of trial-production embodiment 6 ~ 8 and comparative example 3, carries out evaluation same as described above.Show each specification and the evaluation result of each tire in table 2 below.In addition, in table 2, about each assessment item, utilize the relative value when evaluation result of the tire of comparative example 3 being set to 100 to carry out index assessment, numerical value is large, represents each excellent performance.

[table 2]

	Embodiment 6	Embodiment 7	Embodiment 8	Comparative example 3
					Figure	Fig. 2	-	-	-
Tipper 4 and circumferential major trough 2a	Be not communicated with	Be not communicated with	Be not communicated with	Be communicated with
					With or without circumferential tire sipe 5	Have	Nothing	Have	Have
With or without Width tire sipe 6,7	Have	Have	Have	Have
					Tipper 4 and Width tire sipe 7	There is skew	On extended line	There is skew	There is skew
Width tire sipe 6,7 and circumferential major trough 2	Be communicated with	Be communicated with	Be not communicated with	Be communicated with
					The angle of inclination of Width tire sipe 6,7	10°	10°	0°	10°
The angle of inclination of circumference tire sipe 5	5°	-	5°	5°
					Drainage	106	103	102	100
Turn to initial responsibility	107	104	107	100
					Noise performance	105	105	102	100
Deceleration and stopping performance	106	100	106	100

As shown in table 2, the tire of known embodiment 6 ~ 8 compared with the tire of comparative example 3, all can realize simultaneously drainage with turn to initial responsibility.In addition, more known by between embodiment 1 and embodiment 2, has circumferential tire sipe 5 and the deceleration and stopping performance of Width tire sipe 7 not on the extended line of tipper 4 but along the embodiment 6 of tyre surface circumferential offset is more excellent than the deceleration and stopping performance of embodiment 7.And, more known by between embodiment 6 with embodiment 8, Width tire sipe 6,7 be communicated with circumferential major trough 2 and the drainage of embodiment 6 that tilts relative to tread width direction of Width tire sipe 6,7 and noise performance than the drainage of embodiment 8 and noise performance more excellent.

Then, trial-production have the tread contour shown in Fig. 3, the tire of embodiment 9, and compare performance with the tire shown in embodiment 1.Evaluation method is same as described above.Evaluation result is represented with in following table 3.

[table 3]

	Embodiment 1	Embodiment 9
			Figure	Fig. 1	Fig. 3
Drainage	105	105
			Turn to initial responsibility	108	111
Noise performance	106	110
			Deceleration and stopping performance	106	110

As shown in table 3, the drainage of the tire of known embodiment 9 is more excellent than the drainage of the tire of embodiment 1.

Claims

1. an air-inflation tyre, is characterized in that,

This air-inflation tyre has many circumferential major troughs in tread surface, utilizes described many circumferential major troughs and tyre surface end to mark off multiple grounding parts,

Described tipper ends in described grounding parts.

2. air-inflation tyre according to claim 1, is characterized in that,

There is in the end of described second groove, same contrary with that side that described first groove is communicated with side the circumferential tire sipe extended along tyre surface circumference,

3. air-inflation tyre according to claim 2, is characterized in that,

Described Width tire sipe is communicated with described circumferential major trough,

Described Width tire sipe tilts to extend relative to tread width direction.

4. the air-inflation tyre according to Claims 2 or 3, is characterized in that,

Described circumferential tire sipe extends relative to tyre surface peripheral, oblique.

5. air-inflation tyre according to claim 1, is characterized in that,

6. the air-inflation tyre according to claim 2 or 5, is characterized in that,

Described tipper and described Width tire sipe are alternately configured at circumference.

7. air-inflation tyre according to claim 2, is characterized in that,

Two the described Width tire sipes being positioned at a tread width direction half portion centered by tire equator face all inside tread width direction toward the outside the same side of lateral tread circumference tilt to extend.

8. air-inflation tyre according to claim 1, is characterized in that,

The groove depth of described first groove is darker than the groove depth of described second groove.

9. air-inflation tyre according to claim 1, is characterized in that,

Connecting part between described first groove and described second groove has overlooks bending part.

10. air-inflation tyre according to claim 1, is characterized in that,

A cell wall of described first groove is formed in the mode of the cell wall extending described second groove, and another cell wall of described first groove makes the groove width of described first groove become large and be formed with bight.

11. air-inflation tyres according to claim 10, is characterized in that,

Described bight bends.

12. air-inflation tyres according to claim 1, is characterized in that,

With in described grounding parts, adjacent with described tyre surface end outside lug is configured with many translots extended inside tread width direction from described tyre surface end,

Described translot is not communicated with described circumferential major trough, but ends in described outside lug.

13. air-inflation tyres according to claim 12, is characterized in that,

1 Width tire sipe is configured with between described translot.

14. air-inflation tyres according to claim 12, is characterized in that,

Described air-inflation tyre is configured with and extends inside tread width direction from the Width medial end of described translot and to end at the Width tire sipe in described outside lug.

15. air-inflation tyres according to claim 13 or 14, is characterized in that,

The circumferential tire sipe extended along tyre surface circumference is configured with at the tread width direction medial end of described outside lug, described Width tire sipe.

16. air-inflation tyres according to claim 5, is characterized in that,

The narrow groove of described Width comprises the tire sipe part that is communicated with described circumferential tire sipe and has carried out the chamfered part of chamfering in the mode making the degree of depth deepen towards this tire sipe part.

17. air-inflation tyres according to claim 5, is characterized in that,

The groove width of the end of that side be communicated with described circumferential tire sipe of the narrow groove of described Width is thinner than the groove width of other parts of the narrow groove of described Width.