CN1733510A - Pneumatic tire - Google Patents
Pneumatic tire Download PDFInfo
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- CN1733510A CN1733510A CN 200510087798 CN200510087798A CN1733510A CN 1733510 A CN1733510 A CN 1733510A CN 200510087798 CN200510087798 CN 200510087798 CN 200510087798 A CN200510087798 A CN 200510087798A CN 1733510 A CN1733510 A CN 1733510A
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Abstract
A tread portion of a tire includes a first vertical groove, a second vertical groove, a subvertical groove, a first lateral groove, a second lateral groove and a third lateral groove on a surface thereof. The tread portion further includes a first block, a second block, a third block and a fourth block. Each of the blocks has a siping. The siping takes a zigzag shape. Each of the blocks has a large number of small grooves. The shape of the small groove constitutes a part of a wavy curve extended in an axial direction. The small groove has a width which is equal to or greater than 0.1 mm and is equal to or smaller than 2.0 mm and a depth which is equal to or greater than 0.1 mm and is equal to or smaller than 1.0 mm. The small groove (G) has a pitch which is equal to or greater than 0.5 mm and is equal to or smaller than 5.0 mm. The number of cycles of the wavy curve is equal to or larger than 1.0 and is equal to or smaller than 7.0.
Description
Technical field
The present invention relates to a kind of air-inflation tyre.Specifically, the present invention relates to the improvement of tire protector.
Background technology
On ice and snow road, used a kind of spike tire in the past, but in the last few years, the tire of no anti sliding wheel thorn becomes main flow.In the tire of no anti sliding wheel thorn, the deceleration and stopping performance on the ice and snow road is important.The tire of being furnished with glass fibre at tyre surface with the purpose that strengthens deceleration and stopping performance has sale on market.Glass fibre is than ice hardness height.Is furnished with in the tire of glass fibre this glass fibre scraping ice and snow road at tyre surface.By this scraping, can strengthen tire braking performance.
When the sulfuration of tire, the cavity surface of tyre surface and mould connects.By this butt, on tyre surface, form the top layer.The surface on top layer is mirror-like.Surface on the top layer does not expose chopped fiber.When using tire, the top layer just is worn in initial stage early.Because this wearing and tearing expose glass fibre on the surface of tyre surface.By this exposure, can give play to deceleration and stopping performance.
There has been the motion of the deceleration and stopping performance in various enhancings top layer residual period to be suggested.For example, Japanese patent laid-open 7-186633 communique has disclosed a kind of tire, and this tire is formed with thin rib on the surface of tyre surface.Japanese patent laid-open 9-323511 communique has disclosed a kind of tire, and this tire comprises the tire sipe with little degree of depth on its tyre surface.
The deceleration and stopping performance of existing tire when the initial stage of use is still not enough.The user wishes further to strengthen deceleration and stopping performance.
Summary of the invention
The purpose of this invention is to provide a kind of air-inflation tyre with good deceleration and stopping performance.
Air-inflation tyre involved in the present invention comprises fetus face.On the surface of this fetus face, be formed with a large amount of minor grooves.This minor groove has the whole or a part of shape that constitutes wavy curve.
Preferably, the width of this minor groove is more than or equal to 0.1mm and smaller or equal to 2.0mm, and the degree of depth of this minor groove is more than or equal to 0.1mm and smaller or equal to 1.0mm.Preferably, the spacing of this minor groove is more than or equal to 0.5mm and smaller or equal to 5.0mm.
Preferably, wavy curve extending axially along tire.Wavy curve cycle number from a tyre surface termination to another tyre surface termination is more than or equal to 1.0 and smaller or equal to 7.0.
A large amount of blocks that fetus face has longitudinal groove, lateral trench and divided by longitudinal groove and lateral trench.On the surface of this block, be formed with a large amount of minor grooves.Preferably, block also comprises the tire sipe of indention in its surface.Minor groove and tire sipe are with respect to axial crustal inclination opposite each other.Preferably, block is by carrying out crosslinked formation to the rubber composition that is dispersed with chopped fiber.
Block comprises and is positioned near the centerablock the equatorial plane and is positioned near the tyre surface termination shoulder block.Preferably, the density D c of the minor groove in the centerablock is bigger than the density D s of the minor groove in the shoulder block.Preferably, ratio (Dc/Ds) is more than or equal to 1.5 and smaller or equal to 5.0.
A plurality of ribs that fetus face also can have a plurality of longitudinal grooves and be divided by this longitudinal groove.On the surface of this rib, form a large amount of minor grooves.
Rib comprises and is positioned near the central rib the equatorial plane and is positioned near the tyre surface termination shoulder rib.Preferably, the density D c of the minor groove in the central rib is bigger than the density D s of the minor groove in the shoulder rib.Preferably, ratio (Dc/Ds) is more than or equal to 1.5 and smaller or equal to 5.0.
In tire involved in the present invention, the bearing of trend of minor groove changes abundant.This tire has good deceleration and stopping performance when the initial stage of use.
Description of drawings
Fig. 1 is the related airtyred section drawing of expression an embodiment of the present invention;
Fig. 2 is the enlarged drawing of a part of fetus face of presentation graphs 1 tire;
Fig. 3 is the enlarged drawing of a part of fetus face in the presentation graphs 2;
Fig. 4 is the expanded map of a part of fetus face of the related tire of another embodiment of expression the present invention.
The specific embodiment
Describe the present invention in detail below with reference to relevant accompanying drawing, and based on preferred implementation.
In Fig. 1, above-below direction be tire 2 radially, left and right directions be tire 2 axially.Tire 2 comprise fetus face 4, about side wall portion 6 and about bead part 8.Though not shown, in tire 2, between the bead part 8 on the left of tire carcass is set up in and the bead part 8 on right side.In Fig. 2, above-below direction is the circumferential of tire 2, and left and right directions is the axial of tire 2.Centre line C L shown in Fig. 2 is represented the equatorial plane of tire 2.Tire 2 is the tire of no anti sliding wheel thorn.
This fetus face 4 comprises first longitudinal groove 10, second longitudinal groove 12, secondary longitudinal groove 14, first lateral trench 16, second lateral trench 18 and the 3rd lateral trench 20 in its surface.First longitudinal groove 10 and second longitudinal groove 12 are along whole circumferential extension.First lateral trench 16 is connected tyre surface termination Ea with first longitudinal groove 10.Second lateral trench 18 is connected first longitudinal groove 10 with second longitudinal groove 12.The 3rd lateral trench 20 is connected second longitudinal groove, 12 (see figure 1)s on right side with second longitudinal groove 12 in left side.Secondary longitudinal groove 14 is between two second lateral trenchs 18.
This fetus face 4 comprises first block 24, second block 26, the 3rd block 28 and the 4th block 30.Each block 24,26,28 and 30 profile in fact roughly are quadrangle.Also can be arranged to have the block of other contour shape.First block 24 is positioned at the outside of first longitudinal groove 10.This first block 24 is divided by first longitudinal groove 10 and two first lateral trenchs 16.Second block 26 is between first longitudinal groove 10 and secondary longitudinal groove 14.This second block 26 is divided by first longitudinal groove 10, secondary longitudinal groove 14 and two second lateral trenchs 18.The 3rd block 28 is between the secondary longitudinal groove 14 and second longitudinal groove 12.The 3rd block 28 is divided by secondary longitudinal groove 14, second longitudinal groove 12 and two second lateral trenchs 18.The 4th block 30 crossing the line face CL.The 4th block 30 is between second longitudinal groove 12 in second longitudinal groove 12 on right side and left side.The 4th block 30 is divided by two second longitudinal grooves 12 and two the 3rd lateral trenchs 20.
Each block 24,26,28 and 30 has tire sipe S.Described tire sipe S indention.This tire sipe S is formed by the blade of mould.By edge effect and the drain function of tire sipe S, can strengthen the deceleration and stopping performance of tire 2.
Each block 24,26,28 and 30 has a large amount of minor groove G.When imagination on the surface of fetus face 4 when wavy curve is arranged, minor groove G along in this wavy curve, be included in the part in block 24,26,28 and 30 and form.In other words, the shape of this minor groove G is the part of wavy curve.Can find out significantly that from Fig. 2 wavy curve extends vertically.Wavy curve extends to its another termination Eb from a termination Ea of fetus face 4.Imagination along the circumferential direction repeats to be provided with a large amount of wavy curves.The wavy curve of representative type is a sine curve.
Because minor groove G has the edge, therefore increase the friction coefficient of road surface and tire 2 by this minor groove G.In the minor groove G that uses wavy curve, because marginal element is more, therefore compare with the groove on the straight line, increase friction coefficient.Minor groove G also helps drain function.This minor groove G has strengthened the deceleration and stopping performance of tire 2.The tangential direction of wavy curve is according to the difference in place and difference.By forming minor groove G, can strengthen the deceleration and stopping performance on any direction, this minor groove has the shape that constitutes whole or a part of wavy curve.Exhaust when in addition, minor groove G also helps tire 2 sulfurations.
Preferably, the width of minor groove G is more than or equal to 0.1mm and smaller or equal to 2.0mm.At width during less than described scope, might the drain function deficiency.From this viewpoint, more preferably, width is more than or equal to 0.3mm.At width during greater than described scope, because the minimizing of ground contact area, might the deceleration and stopping performance deficiency.From this viewpoint, more preferably, width is smaller or equal to 0.5mm.
Preferably, the degree of depth of minor groove G is more than or equal to 0.1mm and smaller or equal to 1.0mm.In the degree of depth during less than described scope, might the drain function deficiency.From this viewpoint, more preferably, the degree of depth is more than or equal to 0.2mm.If the degree of depth exceeds described scope, because block intensity is lower, block 24,26,28 and 30 is easily deformable.Block 24,26,28 and 30 excessive deformation cause the decline of drainage performance.From this viewpoint, more preferably, the degree of depth is smaller or equal to 0.5mm.
Preferably, the spacing of minor groove G is more than or equal to 0.5mm and smaller or equal to 5.0mm.If spacing is less than described scope, because block intensity is lower, block 24,26,28 and 30 is easily deformable.Block 24,26,28 and 30 excessive deformation cause the decline of drainage performance.From this viewpoint, more preferably, spacing is more than or equal to 1.0mm.When spacing exceeds described scope, might the deceleration and stopping performance deficiency.From this viewpoint, more preferably, spacing is smaller or equal to 4.5mm.On the direction vertical, measure spacing with the bearing of trend of wavy curve.In tire shown in Figure 22, measure spacing in a circumferential direction.
Along under the axially extended situation of tire 2, preferably, the cycle number C of the wavy curve from a tyre surface termination Ea to another tyre surface termination Eb is more than or equal to 1.0, more preferably more than or equal to 2.0 at wavy curve.When the number of the block from a tyre surface termination to another tyre surface termination 24,26,28 and 30 was set to N, cycle number C was preferably smaller or equal to N, more preferably smaller or equal to (N/2).In detail, preferably cycle number C is smaller or equal to 7, more preferably smaller or equal to 3.5.The cycle number of wavy curve shown in Figure 2 is 2.0.Preferably, the amplitude of wavy curve is more than or equal to 3mm, and smaller or equal to 30mm.The amplitude of wavy curve shown in Figure 2 is 7mm.
By the chopped fiber of fusion can be inorganic fibre, also can be organic fiber.As the concrete example of inorganic fibre, can enumerate glass fibre and carbon fiber.As the concrete example of organic fiber, can enumerate nylon fiber, poly-ester fibres and polyethylene fibre.Also can use multiple fiber together.From the viewpoint of deceleration and stopping performance, glass fibre is preferred.Also can use glass fibre and other fiber together.Preferably, the diameter of chopped fiber is more than or equal to 1 μ m, and smaller or equal to 100 μ m.Preferably, the length of chopped fiber is more than or equal to 0.1mm, and smaller or equal to 5.0mm.Preferably, with respect to the virgin rubber of 100 mass parts, the amount of chopped fiber is more than or equal to 1 mass parts, and smaller or equal to 50 mass parts.
Fig. 3 is the enlarged drawing of a part of fetus face 4 in the presentation graphs 2.In Fig. 3, left and right directions is axial.This Fig. 3 illustrates first block 24.Can find out significantly that from Fig. 3 the tire sipe S of first block 24 is towards upper right.On the other hand, the minor groove G of first block 24 is towards the bottom right.In first block 24, tire sipe S and minor groove G are with respect to axial crustal inclination opposite each other.By this opposite inclination, can strengthen the deceleration and stopping performance of tire 2.
In Fig. 3, straight line L1 represents the direction of tire sipe S, and straight line L2 represents the direction of minor groove G.From the viewpoint of deceleration and stopping performance, the angle θ that is formed by straight line L1 and L2 is preferably more than or equal to 10 °, particularly more than or equal to 20 °, and preferably smaller or equal to 90 °, particularly smaller or equal to 60 °.Angle θ measures at the intersection point P place nearest apart from the center of gravity of this each block 24,26,28 and 30.Preferably, in fact straight line L1 and L2 are symmetrical in the axial straight line through a P.
Can be clear that from Fig. 2 in second block 26, tire sipe S is towards the bottom right, minor groove G is towards upper right.In second block 26, tire sipe S and minor groove G are with respect to axial crustal inclination opposite each other.In the 3rd block 28, tire sipe S is towards the bottom right, and minor groove G is towards upper right.In the 3rd block 28, tire sipe S and minor groove G are with respect to axial crustal inclination opposite each other.Preferably, wherein tire sipe S and minor groove G with respect to axially reciprocally the ratio (N1/Nt) of the number N 1 of bevelled block and the aggregate Nt of block more than or equal to 0.5, more preferably more than or equal to 0.7.It is desirable to, described ratio (N1/Nt) is 1.0.
Can be clear that from Fig. 2 and Fig. 3 first lateral trench 16 of dividing first block 24 is towards upper right.On the other hand, as mentioned above, the minor groove G in first block 24 is towards the bottom right.In first block 24, first lateral trench 16 and minor groove G are with respect to axial crustal inclination opposite each other.By this opposite inclination, can strengthen the deceleration and stopping performance of tire 2.
Can be clear that from Fig. 2 in second block 26, second lateral trench 18 is to towards the bottom right, minor groove G is towards upper right.In second block 26, second lateral trench 18 and minor groove G are with respect to axial crustal inclination opposite each other.In the 3rd block 28, second lateral trench 18 is towards the bottom right, and minor groove G is towards upper right.In the 3rd block 28, second lateral trench 18 and minor groove G are with respect to axial crustal inclination opposite each other.Preferably, wherein divide the lateral trench of block and minor groove G with respect to axially reciprocally the ratio (N2/Nt) of the number N 2 of bevelled block and the aggregate Nt of block more than or equal to 0.5, more preferably more than or equal to 0.7.It is desirable to, described ratio (N2/Nt) is 1.0.
Have like this and also can be formed in block 24,26,28 and 30 in order to the minor groove G that constitutes whole wavy curve.Also can take the wavy curve that along the circumferential direction extends.
Fig. 4 is the expanded map of a part of fetus face 34 of the related tire 32 of another embodiment of expression the present invention.Centre line C L shown in Figure 4 is the equatorial plane of tire 32.The cross sectional shape of this tire 32 is identical with the cross sectional shape of tire 2 shown in Figure 1.This tire 32 is for being the tire of no anti sliding wheel thorn.
With tire 2 shown in Figure 1 in the same manner, this fetus face 34 comprises first longitudinal groove 36, second longitudinal groove 38, secondary longitudinal groove 40, first lateral trench 42, second lateral trench 44 and the 3rd lateral trench 46.This fetus face 34 also comprises first block 48, second block 50, the 3rd block 52 and the 4th block 54.The 4th block 54 crossing the line face CL.In the tread contour that the block 54 that crossing the line face CL is arranged exists, the block of crossing the line face CL is known as centerablock, be known as the shoulder block with the immediate block in the termination of fetus face 34, the block that is sandwiched between centerablock and the shoulder block is known as middle block.In tire shown in Figure 4 32, first block 48 is the shoulder block, and second block 50 and the 3rd block 52 are middle block, and the 4th block 54 is a centerablock.Each block 48,50,52 and 54 has tire sipe S.
Each block 48,50,52 and 54 has a large amount of minor groove G1.When imagination on the surface of fetus face 34 when wavy curve is arranged, minor groove G1 along in this wavy curve, be included in the part in block 48,50,52 and 54 and form.In other words, the shape of this minor groove G1 is the part of wavy curve.Can find out significantly that from Fig. 4 wavy curve extends vertically.Wavy curve extends to another termination (not shown) from a termination Ea of fetus face 34.Along circumferentially repeating to be provided with a large amount of wavy curves.The wavy curve of representative type is a sine curve.
The 4th block 54 comprises minor groove G1, comprises minor groove G2 simultaneously.Minor groove G1 and minor groove G2 be alternately configuration in a circumferential direction.When imagination on the surface of fetus face 34 when other wavy curve is arranged, along in this wavy curve, be included in the part in the 4th block 54, and be formed with minor groove G2.In other words, the shape of this minor groove G2 is the part of other wavy curve.Identical along its shape of wavy curve that minor groove G2 is set with the shape of the wavy curve that minor groove G1 is set along it.Although can be located on first block 48, second block 50 and the 3rd block 52 along its wavy curve that minor groove G2 is set, the minor groove of this wavy curve setting of edge is not formed in first block 48, second block 50 and the 3rd block 52 yet.In other words, the spacing of minor groove G1 in the centerablock 54 and G2 is the twice of the spacing of the minor groove G1 in the shoulder block 48.Each minor groove G1 in the centerablock 54 and the density D c of G2 are higher than the density D s of the minor groove G1 in the shoulder block 48.Density is by obtaining divided by being included in minor groove G1 in each block 48 and 54 and the total length of G2 with the area of the ground plane of this block.
The ground connection time of the ground connection time ratio shoulder block 48 of centerablock 54 is long.In addition, the ground pressure of centerablock 54 is bigger than the ground pressure of shoulder block 48.A large amount of minor groove G1 and G2 are formed in this centerablock 54, thereby can strengthen the deceleration and stopping performance of tire 32.The density of the minor groove G1 of shoulder block 48 is low, therefore, can keep the rigidity of shoulder block 48.
From the rigidity viewpoint of deceleration and stopping performance and shoulder block 48, ratio (Dc/Ds), particularly preferably is more than or equal to 1.9 more preferably more than or equal to 1.7 preferably more than or equal to 1.5.From the viewpoint of anti-irregular wear and operation stability, ratio (Dc/Ds),, particularly preferably is smaller or equal to 2.0 further preferably smaller or equal to 2.5 more preferably smaller or equal to 3.0 preferably smaller or equal to 5.0.In tire shown in Figure 4 32, ratio (Dc/Ds) is about 2.0.
Preferably, the density D m of middle block is more than or equal to the density D s of shoulder block.Preferably, the density D m of middle block is smaller or equal to the density D c of centerablock.In the example of Fig. 4, the density D m of middle block equals the density D s of shoulder block.
Preferably, the width of minor groove G1 and G2 is more than or equal to 0.1mm, and smaller or equal to 2.0mm.More preferably, width is more than or equal to 0.3mm.Further preferably, width is smaller or equal to 0.5mm.Preferably, the degree of depth of minor groove G1 and G2 is more than or equal to 0.1mm, and smaller or equal to 1.0mm.More preferably, the degree of depth is more than or equal to 0.2mm.Further preferably, the degree of depth is smaller or equal to 0.5mm.Preferably, the spacing of minor groove G1 and G2 is more than or equal to 0.5mm, and smaller or equal to 5.0mm.More preferably, spacing is more than or equal to 1.0mm.Further preferably, spacing is smaller or equal to 4.5mm.
Have on the face CL under the line under the situation of block decorative pattern of longitudinal groove, the block on contiguous this longitudinal groove left side and right side is known as centerablock.In addition, the block nearest apart from the termination of fetus face 34 is known as the shoulder block, and the block that is clipped between centerablock and the shoulder block is known as middle block.
In addition, in a kind of tread contour, minor groove is an actv., and described tread contour does not have lateral trench, but a plurality of ribs that have a plurality of longitudinal grooves and divide by this longitudinal groove.In this tread contour, preferably, the density D c of the minor groove in the central rib is bigger than the density D s of the minor groove in the shoulder rib.From the viewpoint of the rigidity of deceleration and stopping performance and shoulder rib, ratio (Dc/Ds) is preferably more than or equal to 1.5, more preferably more than or equal to 1.7, further preferably more than or equal to 1.9.From the viewpoint of abrasion resistance and drive safety, ratio (Dc/Ds),, particularly preferably is smaller or equal to 2.0 further preferably smaller or equal to 2.5 more preferably smaller or equal to 3.5 preferably smaller or equal to 5.0.
Preferably, the density D m of intermediate rib is more than or equal to the density D s of shoulder rib.Preferably, the density D m of intermediate rib is smaller or equal to the density D c of central rib.
In the tread contour of the rib that has crossing the line face CL, the rib of crossing over this equatorial plane CL setting is known as central rib, is known as the shoulder rib with the immediate rib in the termination of fetus face, and the rib that is clipped between central rib and the shoulder rib is known as intermediate rib.Have on the face CL under the line under the situation of rib decorative pattern of longitudinal groove, the left side of contiguous this longitudinal groove and the rib on right side are known as central rib.In addition, the rib nearest apart from the termination of fetus face is known as the shoulder rib, and the rib that is clipped between central rib and the shoulder rib is known as intermediate rib.The density of minor groove obtains divided by the total length that is contained in the minor groove in each rib by the area with the earthed surface of this rib.
Embodiment
[experiment 1]
[embodiment 1]
The tire base is put into mould, make rubber produce cross-linking reaction, and manufacture the tire of the no anti sliding wheel thorn of the tread contour that has as shown in Figure 1 to Figure 3.This tire is of a size of " 195/65R1591H ".The minor groove of this tire has the shape of a part that constitutes wavy curve.This wavy curve extends vertically.The cycle number of this wavy curve be 2.0 and amplitude be 7mm.The width of this minor groove is that the 0.3mm and the degree of depth are 0.3mm.The spacing of this minor groove is 2.0mm.
[embodiment 2 to 8]
Except mould is changed, and with beyond the degree of depth of minor groove such setting as shown in table 1 below, other is all identical with embodiment 1, and obtains the tire of embodiment 2 to 8.
[embodiment 2,9 and 10]
Except mould is changed, and with beyond the width of minor groove such setting as shown in table 1 below, other is all identical with embodiment 1, and obtains the tire of embodiment 2,9 and 10.
[embodiment 12 to 16]
Except mould is changed, and with beyond the spacing of minor groove such setting as shown in table 2 below, other is all identical with embodiment 1, and obtains the tire of embodiment 12 to 16.
[embodiment 11,17 and 18]
Except mould is changed, and with beyond the cycle number C of wavy curve such setting as shown in table 2 below, other is all identical with embodiment 1, and obtains the tire of embodiment 11,17 and 18.
[comparative example 1]
Except mould is changed, and be not provided with beyond the minor groove, other is all identical with embodiment 1, and obtains the tire of comparative example 1.
[comparative example 2]
Except mould is changed, and beyond being arranged on minor groove on the straight line that circumferentially extends on the edge, other is all identical with embodiment 1, and obtains the tire of comparative example 2.
[comparative example 3]
Except mould is changed, and beyond being arranged on minor groove on the straight line that extends vertically, other is all identical with embodiment 1, and obtains the tire of comparative example 3.
[evaluation of deceleration and stopping performance]
Tire is packed in the wheel rim of " 15 * 6.5-JJ ".This tire is put on the air, make to press to 200kPa in it.Is 2500cm with this mounting of tyre in free air capacity
3Engine behind front wheel back-wheel drive type passenger vehicle on.This passenger vehicle speed with 50km/h on ice-patch surface is travelled.Like this, the distance that stops from braking to is measured.Carry out ten such measurements, and calculate the aviation value of these observed readings, further calculate the inverse of this aviation value.Its result, shown in table 1 and the table 2, this moment, the evaluation of comparative example 1 was set to 100 as critical for the evaluation.
As shown in Table 1 and Table 2, the tire of embodiment all has superior deceleration and stopping performance.
Table 1 evaluation result
| Embodiment |
| 2 | Embodiment 3 | | Embodiment 1 | Embodiment 5 | | Embodiment 7 | | Embodiment 9 | | |
| Shape | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy |
| Cycle number C | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| Spacing (mm) | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 |
| Width (mm) | 0.1 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.5 | 1.0 |
| The degree of depth (mm) | 0.3 | 0.1 | 0.2 | 0.3 | 0.5 | 0.7 | 1.0 | 1.5 | 0.3 | 0.3 |
| Deceleration and stopping performance | 103 | 103 | 104 | 106 | 107 | 104 | 103 | 102 | 109 | 105 |
Table 2 evaluation result
| Embodiment 11 | | Embodiment 13 | | Embodiment 1 | Embodiment 15 | | Embodiment 17 | | Embodiment 1 | | Embodiment 3 | |
| Shape | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Do not have | Circumferential straight line | Axial straight line |
| Cycle number C | 1.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 3.5 | 7.0 | - | - | - |
| Spacing (mm) | 2.0 | 0.5 | 1.0 | 1.5 | 2.0 | 3.0 | 5.0 | 2.0 | 2.0 | - | 2.0 | 2.0 |
| Width (mm) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | - | 0.3 | 0.3 |
| The degree of depth (mm) | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | - | 0.3 | 0.3 |
| Deceleration and stopping performance | 103 | 102 | 107 | 107 | 106 | 105 | 102 | 108 | 106 | 100 | 100 | 101 |
[experiment 2]
[embodiment 19]
The tire base is put into mould, make rubber produce cross-linking reaction, and manufacture the tire of the no anti sliding wheel thorn of the tread contour that has as shown in Figure 4.This tire is of a size of " 195/65R15 91H ".The minor groove of this tire has the shape of a part that constitutes wavy curve.This wavy curve extends vertically.The cycle number of this wavy curve be 2.0 and amplitude be 7mm.The width of this minor groove is that the 0.3mm and the degree of depth are 0.3mm.The spacing of the minor groove in centerablock is 1.0mm, and the spacing of the minor groove in shoulder block and middle block is 2.0mm.In this tire, ratio (Dc/Ds) is about 2.0.
[embodiment 20 to 27]
Except mould is changed, and beyond spacing such setting the as shown in table 3 below with the minor groove of centerablock, other is all identical with embodiment 19, and obtains the tire of embodiment 20 to 27.
[evaluation of deceleration and stopping performance]
With with experiment 1 identical method, deceleration and stopping performance is estimated.To the tire of embodiment 19 to 27, the embodiment 1 in experiment 1 and the tire of comparative example 1 are estimated.Its result, shown in the following table 3, this moment, the evaluation of embodiment 1 was set to 100 as critical for the evaluation.
[anti-inhomogeneous frictional behaviour evaluation]
Described passenger vehicle is travelled on asphalt coating.Inhomogeneous abrasion degree when operating range is 1000km is carried out visual observation, is divided into " A " to " C " grade.Its result is shown in the following table 3.
" A " is most preferred.
As shown in table 3, the tire of embodiment has superior deceleration and stopping performance.From testing 1 and 2 result, preceence of the present invention becomes clearly.
Above-mentioned tread contour not only goes for not having the tire of anti sliding wheel thorn, also applicable to various motor tires.Above-mentioned explanation only is an example, under the situation that does not break away from essence of the present invention, can carry out various changes.
The application requires the preceence of Japanese patent application 2004-232185 that submitted on August 9th, 2004 and the Japanese patent application 2005-123360 that submitted on April 21st, 2005.The full content of these Japanese patent applications is comprised in this with for referencial use.
Table 3 evaluation result
| Comparative example 1 | Embodiment 1 | | Embodiment 21 | Embodiment 22 | Embodiment 23 | Embodiment 19 | | Embodiment 25 | | Embodiment 27 | ||
| Shape | Do not have | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | Wavy | |
| Cycle number C | - | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | 2.0 | |
| Width (mm) | - | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
| The degree of depth (mm) | - | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |
| Spacing (mm) | Centerablock | - | 2.00 | 1.67 | 1.54 | 1.33 | 1.18 | 1.00 | 0.91 | 0.80 | 0.77 | 0.67 |
| Middle block | - | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | |
| The shoulder block | - | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | |
| Ratio (Dc/Ds) | - | 1.0 | 1.2 | 1.3 | 1.5 | 1.7 | 2.0 | 2.2 | 2.5 | 2.6 | 3.0 | |
| Deceleration and stopping performance | 94 | 100 | 101 | 102 | 105 | 106 | 108 | 108 | 110 | 110 | 111 | |
| Anti-inhomogeneous frictional property | A | A | A | A | A | A | A | B | B | C | C | |
Claims (12)
1. an air-inflation tyre comprises fetus face, it is characterized in that: be formed with a large amount of minor grooves on the surface of this fetus face, described minor groove has the whole or a part of shape that constitutes wavy curve.
2. air-inflation tyre according to claim 1 is characterized in that: the width of described minor groove is more than or equal to 0.1mm and smaller or equal to 2.0mm; The degree of depth of this minor groove is more than or equal to 0.1mm and smaller or equal to 1.0mm.
3. air-inflation tyre according to claim 1 is characterized in that: the spacing of described minor groove is more than or equal to 0.5mm and smaller or equal to 5.0mm.
4. air-inflation tyre according to claim 1 is characterized in that: described wavy curve extends axially along tire, and the cycle number from a tyre surface termination to the wavy curve of another tyre surface termination is more than or equal to 1.0 and smaller or equal to 7.0.
5. air-inflation tyre according to claim 1 is characterized in that: a large amount of blocks that described fetus face has longitudinal groove, lateral trench and divided by this longitudinal groove and lateral trench; On the surface of this block, be formed with a large amount of described minor grooves.
6. air-inflation tyre according to claim 5 is characterized in that: described block also comprises the tire sipe of indention in its surface; Minor groove and tire sipe are with respect to axial crustal inclination opposite each other.
7. air-inflation tyre according to claim 5 is characterized in that: described block is by carrying out crosslinked formation to the rubber composition that is dispersed with chopped fiber.
8. air-inflation tyre according to claim 5 is characterized in that: described block comprises and is positioned near the centerablock the equatorial plane and is positioned near the tyre surface termination shoulder block; The density of the minor groove in the centerablock (Dc) is bigger than the density (Ds) of the minor groove in the shoulder block.
9. air-inflation tyre according to claim 8 is characterized in that: the ratio (Dc/Ds) of the density (Ds) of the minor groove in density of the minor groove in the centerablock (Dc) and the shoulder block is more than or equal to 1.5 and smaller or equal to 5.0.
10. air-inflation tyre according to claim 1 is characterized in that: a plurality of ribs that described fetus face has a plurality of longitudinal grooves and divided by this longitudinal groove; On the surface of this rib, be formed with a large amount of described minor grooves.
11. air-inflation tyre according to claim 10 is characterized in that: described rib comprises and is positioned near the central rib the equatorial plane and is positioned near the tyre surface termination shoulder rib; The density of the minor groove in the central rib (Dc) is bigger than the density (Ds) of the minor groove in the shoulder rib.
12. air-inflation tyre according to claim 11 is characterized in that: the ratio (Dc/Ds) of the density (Ds) of the minor groove in density of the minor groove in the central rib (Dc) and the shoulder rib is more than or equal to 1.5 and smaller or equal to 5.0.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004232185 | 2004-08-09 | ||
| JP2004232185 | 2004-08-09 | ||
| JP2005123360 | 2005-04-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1733510A true CN1733510A (en) | 2006-02-15 |
| CN100577451C CN100577451C (en) | 2010-01-06 |
Family
ID=36076208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510087798A Expired - Fee Related CN100577451C (en) | 2004-08-09 | 2005-08-08 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100577451C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101045428B (en) * | 2006-03-29 | 2010-12-08 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN102686415A (en) * | 2009-12-18 | 2012-09-19 | 纳幕尔杜邦公司 | Low noise tire |
| CN101574902B (en) * | 2008-05-08 | 2013-02-20 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN103415404A (en) * | 2011-03-03 | 2013-11-27 | 株式会社普利司通 | Tire |
| CN105339190A (en) * | 2013-07-16 | 2016-02-17 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN108367621A (en) * | 2015-10-29 | 2018-08-03 | 株式会社普利司通 | Pneumatic tire for bicycle |
| CN109789728A (en) * | 2016-10-07 | 2019-05-21 | 米其林集团总公司 | Tire tread for heavy civil engineering vehicle |
| CN109910520A (en) * | 2017-12-13 | 2019-06-21 | 东洋橡胶工业株式会社 | Pneumatic tire |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6657587B2 (en) * | 2015-04-10 | 2020-03-04 | 横浜ゴム株式会社 | Pneumatic tire |
-
2005
- 2005-08-08 CN CN200510087798A patent/CN100577451C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101045428B (en) * | 2006-03-29 | 2010-12-08 | 东洋橡胶工业株式会社 | Pneumatic tire |
| CN101574902B (en) * | 2008-05-08 | 2013-02-20 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN102686415A (en) * | 2009-12-18 | 2012-09-19 | 纳幕尔杜邦公司 | Low noise tire |
| CN103415404A (en) * | 2011-03-03 | 2013-11-27 | 株式会社普利司通 | Tire |
| CN105339190A (en) * | 2013-07-16 | 2016-02-17 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN105339190B (en) * | 2013-07-16 | 2017-06-13 | 住友橡胶工业株式会社 | Pneumatic tire |
| CN108367621A (en) * | 2015-10-29 | 2018-08-03 | 株式会社普利司通 | Pneumatic tire for bicycle |
| CN109789728A (en) * | 2016-10-07 | 2019-05-21 | 米其林集团总公司 | Tire tread for heavy civil engineering vehicle |
| CN109910520A (en) * | 2017-12-13 | 2019-06-21 | 东洋橡胶工业株式会社 | Pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100577451C (en) | 2010-01-06 |
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