CN101801688A - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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Publication number
CN101801688A
CN101801688A CN 200880106816 CN200880106816A CN101801688A CN 101801688 A CN101801688 A CN 101801688A CN 200880106816 CN200880106816 CN 200880106816 CN 200880106816 A CN200880106816 A CN 200880106816A CN 101801688 A CN101801688 A CN 101801688A
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CN
China
Prior art keywords
slot
mentioned
vehicle
inclination
grounding parts
Prior art date
Application number
CN 200880106816
Other languages
Chinese (zh)
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CN101801688B (en
Inventor
越智直也
Original Assignee
株式会社普利司通
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to JP2007-238426 priority Critical
Priority to JP2007238426A priority patent/JP5165975B2/en
Application filed by 株式会社普利司通 filed Critical 株式会社普利司通
Priority to PCT/JP2008/065963 priority patent/WO2009034912A1/en
Publication of CN101801688A publication Critical patent/CN101801688A/en
Application granted granted Critical
Publication of CN101801688B publication Critical patent/CN101801688B/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/0304Asymmetric patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/12Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING OR REPAIRING; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C2011/0337Tread patterns characterised by particular design features of the pattern
    • B60C2011/0339Grooves
    • B60C2011/0381Blind or isolated grooves

Abstract

A pneumatic tire simultaneously achieves improved water discharge characteristics and reduced noise. Fundamental water discharge performance is secured by providing a tread (12) with a first circumferential main groove (14), a second circumferential main groove (16), and a third circumferential main groove (18). V-shaped grooves (36) connected to the first circumferential main groove (14) are formed in a second land section (22) in a tread center region, and this secures water discharge characteristics and eliminates high frequency noise. On the other hand, L-shaped grooves (52) connected to the third circumferential main groove (18) are formed in a fourth land section (26) located on the side facing the vehicle, and this secures water discharge characteristics and eliminates high frequency noise. Excellent water discharge and low noise characteristics are simultaneously achieved by positioning the V-shaped grooves (36) on the side opposite the vehicle when the tire is mounted on it and positioning the L-shaped grooves (52) on the vehicle side.

Description

Air-inflation tyre

Technical field

The present invention relates to a kind of air-inflation tyre, particularly a kind of air-inflation tyre that has improved the anti-irregular wear performance of the most inboard grounding parts of vehicle-width direction when being installed on the vehicle.

Background technology

In paying attention to the summer grade tire of performance balance, adopt usually and made up the straight line major trough that circumferentially extends along tire and with respect to the block-type tread (with reference to patent documentation 1) of the cros-rib tread groove of tire peripheral, oblique.And, in order to obtain higher performance, make the tread contour left and right sides asymmetric.In addition, in directive decorative pattern, can there be the restriction rotation and unworkable problem, so adopts the decorative pattern that does not have directivity mostly.

And under the situation of the non-symmetrical design that does not have directivity, the cros-rib tread groove circumferentially has bigger angle with respect to tire.

And, in order to make wetland moisture film sliding performance, to be that drainage is good, can increase circumferential major trough usually, widen well width etc. and increase the groove area ratio of pattern block area (pattern groove with).But, when increasing circumferential major trough, have the high frequency noise that produces by the sympathetic response in the circumferential major trough tangible problem that becomes.

In the air-inflation tyre of so far the non-symmetrical design that does not have directivity, for be suppressed at do road surface, ground and wetland road surface when handling to vehicle one side flow, therefore can't dispose the cros-rib tread groove that circumferentially has less angle of inclination with respect to tire.

In making with respect to the cros-rib tread groove that circumferentially has bigger angle of inclination, decorative pattern noise, drainage variation.

And, if configuration cros-rib tread groove then becomes block-type tread, if make block-type tread then since the reduction of block rigidity be not easy to guarantee do, operation stabilization performance on the wetland road surface, if eliminate this problem and make the circumferential pitch of cros-rib tread groove long when elongated, then become unfavorable because of producing noise etc., therefore, be difficult to obtain overall balance as tire.

Therefore, expectation can realize drainage and squeal of tire simultaneously, and further improves drainage and tire noise abatement performance.

Patent documentation 1: TOHKEMY 2004-306906 number

Summary of the invention

The present invention makes in order to address the above problem, and its purpose is to provide a kind of air-inflation tyre that can realize drainage and tire noise abatement simultaneously and can obtain overall balance.

Technical scheme 1 described invention is a kind of air-inflation tyre, it has 3 circumferential major troughs at least on tyre surface, and the tread contour left and right sides is asymmetric, wherein, this air-inflation tyre has V-shape groove and L font groove on tyre surface, above-mentioned V-shape groove is made of the 1st inclination slot part and the 2nd inclination slot part: the circumferential major trough of the above-mentioned outermost vehicle-width direction outermost of the vehicle-width direction of the 1st inclination slot part self-configuring when vehicle is installed extends and stops in grounding parts to a side of vehicle-width direction inboard and tire hand of rotation; Above-mentioned the 2nd inclination slot part terminal part in the grounding parts of above-mentioned the 1st inclination slot part extends to the opposite side of tire hand of rotation, and above-mentioned L font groove is made of cros-rib tread slot part and auxiliary slot part: the inner circumferential major trough of the most inboard vehicle-width direction of the vehicle-width direction of above-mentioned cros-rib tread slot part self-configuring when vehicle is installed is to the inboard extension of vehicle-width direction and stop in grounding parts; Above-mentioned auxiliary tank terminal part in the grounding parts of above-mentioned cros-rib tread slot part extends to the direction of intersecting with above-mentioned cros-rib tread slot part.

Then, technical scheme 1 described airtyred effect is described.

In technical scheme 1 described air-inflation tyre, on tyre surface, have 3 circumferential major troughs at least, if at the circumferential major trough that is provided with on the tyre surface more than 3, then can guarantee basic drainage performance.

By circumferential major trough more than 3 is being set on the tyre surface, the tyre surface center side on tyre surface is provided with 2 row middle sections (2 row grounding parts) at least, can guarantee in the basic operation stabilization performance of doing on ground, the wetland road surface.And, by circumferential major trough more than 3 is being set on the tyre surface, tyre surface can be divided into clearly the two side areas in the tread width direction outside of the middle section of tread width direction center side and middle section, can to irregular wear require harsh two side areas help preventing irregular wear setting, middle section is helped doing the setting of ground, wetland, drainage performance, thereby can be on each zone separation function clearly.

Tyre surface is made non-symmetrical design, and therefore, the vehicle-width direction in the time of can be on being installed in vehicle is inboard payes attention to wearing and tearing, pay attention to drainage separation function in this wise in the vehicle-width direction outside.

Be provided with V word shape groove in the vehicle-width direction inboard of the outermost circumferential major trough of vehicle-width direction, thus the 1st inclination slot part that extends from the circumferential major trough of outermost can be efficiently laterally circumferential major trough discharge the water of (middle section promptly) in the grounding parts at the 1st inclination slot part place.

And, it is crooked from several the 2nd the circumferential major trough ground of outermost that the V-shape groove that is connected with outermost circumferential major trough does not run through, therefore, can prevent since from from several the 2nd the circumferential major troughs of outermost to this V-shape concentrated flow go into and in the V-shape groove, produce turbulent flow, can further improve the drainage efficiency of V-shape groove.

And the V-shape groove is crooked on the way and branch out the long groove of length overall from outermost circumferential major trough, thereby the long branch's groove of such length overall can be eliminated near higher frequency that circumferential major trough produces (for example, the sound 1kHz).

Like this, the V-shape groove can help drainage and tire noise abatement performance.

In addition, go up configuration L font groove than being configured in the most inboard inner circumferential major trough of vehicle-width direction when being installed on the vehicle by the grounding parts (so-called tire shoulder grounding parts) of vehicle-width direction inboard, by this L font groove is connected with inner circumferential major trough, thereby can be suppressed at the high frequency noise that produces in the inner circumferential major trough, even, also can guarantee drainage further in order to tackle noise, irregular wear and the grounding parts will be installed on the vehicle time is set at the rib shape.

By in this wise the V-shape groove is configured in tyre surface be installed on the vehicle time the outside, with L font groove be configured in tyre surface be installed on the vehicle time the inboard, thereby can realize good drainage and noise abatement simultaneously, can obtain overall balance.

Technical scheme 2 described inventions are that in technical scheme 1 described air-inflation tyre, above-mentioned the 2nd inclination slot part stops in grounding parts.

Then, technical scheme 2 described airtyred effects are described.

By the 2nd inclination slot part that constitutes the V-shape groove is stopped in grounding parts, thereby can guarantee from being configured in the grounding parts rigidity of the circumferential major trough of the outermost outermost of vehicle-width direction, can guarantee in the operation stabilization performance of doing on road surface, ground and the wetland road surface to the grounded part (tire middle section) of vehicle-width direction inboard.

And, stop in grounding parts by making the 2nd inclination slot part, make the V-shape groove only be one, thereby the Tire High Frequency noise is had significant effect towards the open end of circumferential major trough.

Technical scheme 3 described inventions are, in technical scheme 2 described air-inflation tyres, above-mentioned the 1st inclination slot part angle of inclination circumferential with respect to tire is set at 20 °~70 ° in the open end office of the circumferential major trough of above-mentioned outermost, above-mentioned the 2nd inclination slot part with respect to the circumferential angle of inclination of tire less than above-mentioned the 1st rake angle of inclination circumferential with respect to tire.

Then, technical scheme 3 described airtyred effects are described.

For the opening portion towards circumferential major trough of V-shape groove, that is, the 1st inclination slot part is preferably set to 20 °~70 ° to the angle of inclination of the open end portion of the circumferential major trough of outermost (circumferential with respect to tire) when considering drainage.That is,, can obtain higher drainage by this angle of inclination being set at 20 °~70 °.In addition, when this angle of inclination during less than 20 °, near the grounding parts rigidity deficiency the open end is brought bad influence to road-holding property, irregular wear.On the other hand, when this angle of inclination during greater than 70 °, having preferably, this advantage point of drainage dies down.

In addition, the angle of inclination of V-shape groove in groove and non-constant, near the open end for bigger angle, near near (bonding part of the 1st inclination slot part and the 2nd inclination slot part) gradual change such as diminish gradually crooked, also more favourable to drainage, road-holding property.And, the angle of inclination more preceding than this bending, angle of inclination after the bending circumferentially diminished with respect to tire, promptly, the angle that the 2nd inclination slot part is circumferential with respect to tire (near the circumferential angle of tire) is set at less than the 1st inclination slot part angle circumferential with respect to tire, thereby can will be formed with the grounded part of V-shape groove along circumferentially cutting apart, it is best can making lateral rigidity under the state of the grounding parts rigidity of guaranteeing fore-and-aft direction, can be implemented in and do the good road-holding property of balance on road surface, ground and the wetland road surface.

Technical scheme 4 described inventions are that in each described air-inflation tyre, above-mentioned auxiliary slot part circumferentially extends along tire, stops in grounding parts in technical scheme 1~technical scheme 3.

Then, technical scheme 4 described airtyred effects are described.

L font groove stops with approaching circumferential state after bending, thereby can guarantee the grounding parts rigidity, can guarantee to do the operation stabilization performance on road surface, ground and the wetland road surface.And because L font groove is not connected with other grooves that are different from circumferential major trough, the high frequency noise when therefore reduction being travelled is favourable.

Technical scheme 5 described inventions are that in each described air-inflation tyre, the pitch of above-mentioned V-shape groove is grown up long in the pitch of above-mentioned L font groove in technical scheme 1~technical scheme 4.

Then, technical scheme 5 described airtyred effects are described.

The circumferential pitch length that is positioned at the V-shape groove in the vehicle-width direction outside when will be on being installed on vehicle is set at circumferential pitch greater than L font groove when long, the V-shape groove can further help to improve drainage, L font groove is positioned at the position than the vehicle-width direction inboard of V-shape groove when being installed on the vehicle, therefore, be set at greater than the circumferential pitch of L font groove longly by the circumferential pitch length that makes the V-shape groove, can suppress a kind of step-like wearing and tearing as irregular wear.And, because the slot length of V-shape groove and the slot length of L font have greatly changed, therefore, can on each groove, change the frequency-response data of the high frequency noise that produces when travelling, further have effect to reducing squeal of tire.

Technical scheme 6 described inventions are in each described air-inflation tyre, above-mentioned cros-rib tread slot part and above-mentioned auxiliary slot part angulation to be set at 90 ° in technical scheme 1~technical scheme 5.

Then, technical scheme 6 described airtyred effects are described.

Cros-rib tread slot part and auxiliary slot part angulation are set at 90 °, thereby can guarantee to be formed with the rigidity that is positioned at the grounding parts of inboard when being installed on the vehicle of L font groove, can improve anti-irregular wear thus.

As mentioned above, air-inflation tyre of the present invention is a said structure, has can realize improving drainage simultaneously and reduce the so good effect of squeal of tire.

Description of drawings

Fig. 1 is the birds-eye view of the airtyred tyre surface of an embodiment of the invention.

Fig. 2 is the birds-eye view of airtyred tyre surface of example in the past.

Description of reference numerals

10: air-inflation tyre; 12: tyre surface; 14: the 1 circumferential major troughs (the circumferential major trough of vehicle-width direction outermost); 16: the 2 circumferential major troughs; 18: the 3 circumferential major troughs (the inner circumferential major trough of vehicle-width direction); 20: the 1 grounding parts; 22: the 2 grounding parts; 24: the 3 grounding parts; 26: the 4 grounding parts; 36:V font groove; 36A: the 1st inclination slot part; 36B: the 2nd inclination slot part; 52:L font groove; 52A: cros-rib tread slot part; 52B: circumferential slot part (auxiliary slot part)

The specific embodiment

Below, the air-inflation tyre 10 of the embodiment that present invention will be described in detail with reference to the accompanying.

The tyre surface 12 of the air-inflation tyre 10 of present embodiment tire equator face CL be installed on the vehicle time the outside (OUT of arrow shown in figure direction side is the outside when being installed on the vehicle) be formed with the 1st circumferential major trough 14, tire equator face CL be installed on the vehicle time inboard (arrow IN direction side is the inboard when being installed on the vehicle) be formed with the 2nd circumferential major trough 16, the 2nd circumferential major trough 16 be installed on the vehicle time the inboard be formed with the 3rd circumferential major trough 18, the 1st circumferential major trough 14 be installed on the vehicle time the outside divide the 1st grounding parts 20 arranged, between the 1st circumferential major trough 14 and the 2nd circumferential major trough 16, divide the 2nd grounding parts 22 is arranged, dividing between the 2nd circumferential major trough 16 and the 3rd circumferential major trough 18 has the 3rd grounding parts 24, the 3rd circumferential major trough 18 be installed on the vehicle time the inboard division the 4th grounding parts 26 is arranged.

Circumferentially alternately be formed with the 1st cros-rib tread groove 28 of transversal the 1st grounding parts and the 2nd cros-rib tread groove 30 that in grounding parts, stops from the extension of ground terminal 12E side direction tire equatorial plane CL side in the 1st grounding parts 20 upper edges.And, on the 1st grounding parts 20, be formed with the 1st tire sipe 32 that extends along circumferentially, and the 2nd tire sipe 34 that the 2nd cros-rib tread groove 30 and the 1st circumferential major trough 14 are coupled together.

In addition, as mentioned herein ground terminal 12E be meant with air-inflation tyre 10 be installed on the standard wheel rim of JATMA YEAR BOOK (2007, Japanese car tire association criterion) defined, maximum load ability (the boldface type load of interior pressure-load capacity corresponding tables) the cooresponding air pressure (maximum empty atmospheric pressure) of suitable specification among filling and the JATMA YEAR BOOK, level tire is 100% the interior pressure part when having the maximum load ability.In that land used or manufactured place are used under the situation of TRA standard, ETRTO standard, determine according to standard separately.

On the 2nd grounding parts 22, upwards be formed with to devices spaced apart many V-shape grooves 36 in tire week, this V-shape groove 36 is made of the 1st inclination slot part 36A and the 2nd inclination slot part 36B, the inboard of above-mentioned the 1st inclination slot part 36A when the 1st circumferential major trough 14 is on being installed on vehicle circumferentially stops in grounding parts towards the upper left side diagonally extending with respect to tire, and the outside of above-mentioned the 2nd inclination slot part 36B when terminal part is on being installed on vehicle in the grounding parts of the 1st inclination slot part 36A circumferentially tilts towards the lower right with respect to tire and stop in grounding parts, and the angle of inclination circumferential with respect to tire is set at the angle of inclination circumferential with respect to tire less than the 1st inclination slot part 36A.

At this, preferably that the open end portion of the 1st inclination slot part 36A is circumferential with respect to tire angle of inclination is set at 20 °~80 °.

And, on the extended line that is being formed at the 1st cros-rib tread groove 28 on the 1st grounding parts 20 on the 2nd grounding parts 22, be formed with the 3rd short cros-rib tread groove 40.

In addition, on the 2nd grounding parts 22, be formed with the 3rd tire sipe 42 that centre portion and the 1st circumferential major trough 14 with the 1st inclination slot part 36A couple together and with the centre portion of the end of the 2nd inclination slot part 36B and the 4th tire sipe 44 that the 2nd circumferential major trough 16 couples together.In addition, well width became zero well width or does not have the meaning of decorative pattern of the incision shape of well width when tire sipe was meant grounding parts ground connection, when grounding parts ground connection, the opposed facing cell wall of tire sipe fits tightly each other strongly, therefore, for the inc groove, this tire sipe is kept to seldom the reduction of grounding parts rigidity with respect to ground connection the time.

Like this, the 2nd grounding parts 22 is not upwards separated in week by V-shape groove 36, forms at the continuous rib that makes progress in week.

Form an end and the 3rd the 5th tire sipe 46 that circumferential major trough 18 is connected, the other end stops on the 3rd grounding parts 24 in grounding parts, be formed with circular hole 47 at the grounding parts terminal part of the 5th tire sipe 46.That is, the 3rd grounding parts 24 is not upwards separated in week by inc groove when the ground connection, forms at the continuous rib that makes progress in week.

The 4th grounding parts 26 disposes 2 row in ground terminal 12E side and circumferentially disposes the recess row 50 that a plurality of recesses 48 form along tire.In addition, 2 recess row 50 are configured in the position of leaning on ground terminal 12E side than the Width center of the 4th grounding parts 26.

There is no particular limitation for the shape of the recess when overlooking tyre surface 12 48, but preferably have the straight line portion that circumferentially extends along tire in the tire equator face CL side of the peristome of tyre surface ground plane.As shown in Figure 1, the recess 48 of present embodiment is the length of side trapezoidal that the distolateral length of side of ground connection is shorter than tire equator face CL side.

In addition, the tire equator face CL side of the recess 48 on the 4th grounding parts 26 upwards disposes to devices spaced apart a plurality of L font grooves 52 in tire week.

L font groove 52 is made of cros-rib tread slot part 52A and circumferential slot part 52B, above-mentioned cros-rib tread slot part 52A extends and stops in grounding parts to vehicle-width direction is inboard from the 3rd circumferential major trough 18, and above-mentioned circumferential slot part 52B terminal part in the grounding parts of cros-rib tread slot part 52A circumferentially extends and stops in grounding parts towards the arrow B direction along tire.

Inc groove did not upwards separate in week when the 4th grounding parts 26 also was grounded, and formed at the continuous rib that makes progress in week.

In addition, in the present embodiment, cros-rib tread slot part 52A and circumferentially slot part 52B angulation but also can be 90 ° less than 90 °, also can be greater than 90 °.

And as shown in Figure 1, tyre surface 12 is a non-symmetrical design in the air-inflation tyre 10 of present embodiment, but does not specify hand of rotation.

And, in the air-inflation tyre 10 of present embodiment, set the pitch length of V-shape groove 36 long greater than the pitch of L font groove 52.

Effect

In the air-inflation tyre 10 of present embodiment,, therefore, can guarantee basic drainage performance owing on tyre surface 12, be provided with the 1st circumferential major trough the 14, the 2nd circumferential major trough 16 and 3 circumferential major troughs of the 3rd circumferential major trough 18 these totals.

By 3 circumferential major troughs are set on tyre surface 12, tyre surface 12 can be divided into clearly the two side areas 12S in the tread width direction outside of the middle section 12C of tread width direction center side and middle section 12C on Width, can require harsh two side areas 12S to be set to irregular wear to help preventing irregular wear, middle section 12C is set at helps doing ground, wetland, drainage performance, thereby become the structure of separation function clearly.

Because the 2nd inclination slot part 36B that constitutes V-shape groove 36 is stopped in the 2nd grounding parts 22, the 2nd grounding parts 22 is formed rib, therefore, can guarantee the grounding parts rigidity of the 2nd grounding parts 22, can guarantee the operation stabilization performance on road surface, dried ground and wetland road surface.In addition, the 3rd grounding parts 24 also forms rib, therefore can guarantee the grounding parts rigidity of the 3rd grounding parts 24, can guarantee the operation stabilization performance on road surface, dried ground and wetland road surface.That is, on the middle section 12C that can have bigger benefit on the fetus face 12 to the operation stabilization performance, be provided with the 2nd grounding parts 22 and the 3rd grounding parts 24 these 2 row ribs, therefore, can in doing ground, wetland road surface, guarantee higher operation stabilization performance.

And, in the air-inflation tyre 10 of present embodiment, make tyre surface 12 be non-symmetrical design, therefore, the vehicle-width direction in the time of can be on being installed in vehicle is inboard payes attention to wearing and tearing, pay attention to the such separation function of drainage in the vehicle-width direction outside.

At this, the vehicle-width direction inboard of vehicle-width direction the outermost the 1st circumferential major trough 14 when being installed on the vehicle on the tyre surface 12 is provided with V-shape groove 36, the 1st inclination slot part 36A that extends from the 1st circumferential major trough 14 can be when wetland travels with laterally the 1st circumferential major trough 14 discharges effectively of the water of the 2nd grounding parts 22.That is, can be effectively water the 1st circumferential major trough 14 laterally of the middle section 12C of tyre surface 12 be discharged, improve wetland moisture film sliding performance.

In the present embodiment, the angle of inclination of the tipper part of V-shape groove 36 is also non-constant in groove, near the open end with respect to tire circumferentially with bigger angle tilt, near crooked (near the bonding part of the 1st inclination slot part 36A and the 2nd inclination slot part 36B) diminish gradually, therefore, also more favourable to drainage, road-holding property.And, the angle of inclination more preceding than this bending, angle of inclination after the bending diminished, promptly, the angle initialization that the 2nd inclination slot part 36B is circumferential with respect to tire is less than the 1st inclination slot part 36A angle circumferential with respect to tire, therefore, the 2nd grounding parts 22 edges that are formed with V-shape groove 36 circumferentially can be cut apart, it is best can making lateral rigidity under the state of the grounding parts rigidity of guaranteeing fore-and-aft direction, can be implemented in and do the good road-holding property of balance on road surface, ground and the wetland road surface.

And V-shape groove 36 does not run through the 2nd circumferential major trough 16 ground bendings of tire equator face CL side, therefore, can prevent from can further improve drainage efficiency owing to from the turbulent flow of the 2nd circumferential major trough 16 in the V-shape groove that these V-shape groove 36 inflows produce.

In addition, the V-shape groove 36 that is connected with the 1st circumferential major trough 14 is crooked on the way and branch out the groove that length overall is grown from the 1st circumferential major trough, the 2nd inclination slot part 36B is stopped in the 2nd grounding parts 22, therefore, branch's groove that such length overall is long can be eliminated near the higher frequency that produces at the 1st circumferential major trough 14 (for example, 1kHz) noise (sonorant) effectively.

That is, V-shape groove 36 can help drainage and tire noise abatement significantly.

In addition, on tyre surface 12, from than being configured in the 3rd the most inboard circumferential major trough 18 of vehicle-width direction when being installed on the vehicle to the inboard configuration of vehicle-width direction L font groove 52, therefore, can utilize L font groove 52 to be suppressed at the high frequency noise that produces in the 3rd circumferential major trough 18, even, also can guarantee the drainage of vehicle-width direction inboard further in order to tackle noise, irregular wear and the 4th the most inboard grounding parts 26 is set at the rib shape.

In addition,, therefore, can guarantee the grounding parts rigidity of the 4th grounding parts 26 after bending, can guarantee in the operation stabilization performance of doing on road surface, ground and the wetland road surface because L font groove 52 stops with approaching circumferential state.And, because L font groove 52 is not connected with the 3rd circumferential major trough 18 groove in addition, therefore, help lowering in motion high frequency noise.

In addition, the circumferential pitch length that is positioned at the V-shape groove 36 in the vehicle-width direction outside in the time of will be on being installed on vehicle is set at circumferential pitch greater than L font groove 52 when long, V-shape groove 36 can further help to improve drainage, L font groove 52 is positioned at the position than the vehicle-width direction inboard of V-shape groove 36 when being installed on the vehicle, therefore, be set at greater than the circumferential pitch of L font groove longly by the circumferential pitch length that makes V-shape groove 36, can suppress a kind of step-like wearing and tearing as irregular wear.And, because the slot length of V-shape groove 36 and the slot length of L font groove 52 have greatly changed, therefore, can on each groove, change the frequency-response data of the high frequency noise that produces when travelling, further have effect to reducing squeal of tire.

Like this, the outside when being installed on the vehicle by V-shape groove 36 is configured in is configured in inboard when being installed on the vehicle with L font groove 52, thereby can realizes good drainage and noise abatement simultaneously.

In addition, if the angle of inclination of the open end portion of the 1st inclination slot part 36A of V-shape groove 36 is during less than 20 °, then near the grounding parts rigidity deficiency the open end is brought harmful effect to road-holding property, irregular wear.On the other hand, when this angle of inclination during greater than 70 °, to drainage preferably advantage point die down.

Other embodiments

The 4th the most inboard grounding parts 26 when being installed on the vehicle is that irregular wear is required harsh grounding parts, but be set at 90 ° by cros-rib tread slot part 52A and circumferential slot part 52B angulation with L font groove 52, the rigidity of the 4th grounding parts 26 can be guaranteed, the anti-irregular wear performance of the 4th grounding parts 26 can be improved.

The test example

For clear and definite effect of the present invention, the air-inflation tyre of preparing routine in the past air-inflation tyre and using embodiments of the invention has carried out the irregular wear test.

Embodiment: be air-inflation tyre with tread contour of above-mentioned embodiment.In addition, its groove depth is 8.3mm.The well width of the 1st circumferential major trough is 8.5mm, and the well width of the 2nd circumferential major trough is 9.0mm, and the well width of the 3rd circumferential major trough is 7.5mm.The width of the 1st grounding parts is 30mm, and the width of the 2nd grounding parts is 35mm, and the width of the 3rd grounding parts is 13.2mm, and the width of the 4th grounding parts is 32mm.On the other hand, the angle of inclination of V-shape groove is 45 ° in the 1st circumferential major trough side, is 30 ° near curve.And the circumferential pitch of V-shape groove is long to be 58mm, and the circumferential pitch of L font groove is long to be 28mm.

Routine in the past: as to be air-inflation tyre with tread contour shown in Figure 2.In addition, in tyre surface shown in Figure 2 100, Reference numeral 102,104,106,108 is circumferential major trough, Reference numeral 110,112,114,116,118 is grounding parts, Reference numeral 120,122,123 is the cros-rib tread groove, Reference numeral 124,126,127 is tire sipe, Reference numeral 128 is for by the cros-rib tread slot part 128A and the circumferential curved slot of the roughly L font that constitutes of the 128B of major trough portion, Reference numeral 130,132 are recess triangular in shape when overlooking tire tread form, Reference numeral 134 is from the tire sipe of recess 130 to the distolateral extension of tyre surface, and Reference numeral 100E is a ground terminal.In addition, the groove depth of cros-rib tread slot part 128A and the circumferential major trough 128B of portion is respectively 7.5mm, and the width of cros-rib tread slot part 128A is 3mm, and length is 12mm, and circumferentially the width of the 128B of major trough portion is 4mm, and length is 12mm.

In addition, at embodiment and in the past in the example, tire size is 195/65R15.

Moisture film sliding performance test: the feeling evaluation that is the test drives person when producing moisture film and slide the wetland road surface of hump speed by depth of water 5mm.This evaluation is 100 with routine exponential representation in the past, and the big more expression performance of numerical value is good more.

Doing road surface, ground operation stabilization performance can test: the feeling evaluation that is the test drives person when motion is travelled on the route of doing the ground state with various driving modes.This evaluation is 100 with routine exponential representation in the past, and the big more expression performance of numerical value is good more.

Wetland road surface operation stabilization performance can be tested: be with move on the general road of the wetland state feeling evaluation of the test drives person when travelling of various driving modes.This evaluation is 100 with routine exponential representation in the past, and the big more expression performance of numerical value is good more.

Tire (decorative pattern) noise testing: the feeling evaluation that is the test drives person when on the general road of doing the ground state, travelling with various driving modes.This evaluation is 100 with routine exponential representation in the past, and the big more expression performance of numerical value is good more.

Ride comfort property testing: the feeling evaluation that is the test drives person when on the general road of doing the ground state, travelling with various driving modes.This evaluation is 100 with routine exponential representation in the past, and the big more expression performance of numerical value is good more.

Anti-irregular wear performance testing: be when on the general road of doing the ground state, travelling with various driving modes, face diff-H abrasion loss between the decorative pattern bulk mutually behind the 50km that travels.With the exponential representation reciprocal of the height residual quantity of example in the past is 100, and it is good more to set the big more anti-irregular wear performance of numerical value.

Table 1

Routine in the past Embodiment Moisture film sliding performance (craspedodrome) ??100 ??111 Do road surface, ground operation stabilization performance energy ??100 ??108 Wetland road surface operation stabilization performance energy ??100 ??110 Tire (decorative pattern) noise ??100 ??112 Travelling comfort ??100 ??106 Anti-irregular wear performance ??100 ??102

From test results as can be known, the air-inflation tyre of using embodiments of the invention is with respect to routine in the past air-inflation tyre, and all performances all are improved.

Claims (6)

1. air-inflation tyre, it has 3 circumferential major troughs at least on tyre surface, and the tread contour left and right sides is asymmetric, wherein,
This air-inflation tyre has V-shape groove and L font groove on tyre surface,
Above-mentioned V-shape groove is made of the 1st inclination slot part and the 2nd inclination slot part: the circumferential major trough of the above-mentioned outermost vehicle-width direction outermost of the vehicle-width direction of the 1st inclination slot part self-configuring when vehicle is installed extends to the vehicle-width direction inboard and to a side of tire hand of rotation, and stops in grounding parts; Above-mentioned the 2nd inclination slot part terminal part in the grounding parts of above-mentioned the 1st inclination slot part extends to the opposite side of tire hand of rotation,
Above-mentioned L font groove is made of cros-rib tread slot part and auxiliary slot part: the inner circumferential major trough of the most inboard vehicle-width direction of the vehicle-width direction of above-mentioned cros-rib tread slot part self-configuring when vehicle is installed extends and stops in grounding parts to vehicle-width direction is inboard; Above-mentioned auxiliary slot part terminal part in the grounding parts of above-mentioned cros-rib tread slot part extends to the direction of intersecting with above-mentioned cros-rib tread slot part.
2. air-inflation tyre according to claim 1, wherein,
Above-mentioned the 2nd inclination slot part stops in grounding parts.
3. air-inflation tyre according to claim 2, wherein,
Above-mentioned the 1st inclination slot part angle of inclination circumferential with respect to tire is set at 20 °~70 ° in the open end office of the circumferential major trough of above-mentioned outermost, above-mentioned the 2nd inclination slot part with respect to the circumferential angle of inclination of tire less than above-mentioned the 1st rake angle of inclination circumferential with respect to tire.
4. according to each described air-inflation tyre in the claim 1~3, wherein,
Above-mentioned auxiliary slot part circumferentially extends along tire, stops in grounding parts.
5. according to each described air-inflation tyre in the claim 1~4, wherein,
The pitch of above-mentioned V-shape groove is grown up long in the pitch of above-mentioned L font groove.
6. according to each described air-inflation tyre in the claim 1~5, wherein,
Above-mentioned cros-rib tread slot part and above-mentioned auxiliary slot part angulation are set at 90 °.
CN 200880106816 2007-09-13 2008-09-04 Pneumatic tire CN101801688B (en)

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JP2007238426A JP5165975B2 (en) 2007-09-13 2007-09-13 Pneumatic tire
PCT/JP2008/065963 WO2009034912A1 (en) 2007-09-13 2008-09-04 Pneumatic tire

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