Background technology
Generally speaking, vehicle tyre can not adapt to all peripheries and the use under the environmental conditions.An example is, in the four seasons very tangible region respectively, and for purposes and its usage condition that makes each vehicle matches, the changing of tire at any time of having to.Some tire product just can not be brought into play its function beyond earmarking, have the shortcoming of the inconvenience that increases the customer.
Therefore, in order to eliminate this inconvenience all-year tire has been proposed.The advantage of this all-year tire is a changing of tire not in changes of seasons, has reduced the inconvenience that brings to the customer.Recently, outside above-mentioned functions, also to road, non-paving road, main line, wet road, and snow road etc. on the tractive force performance cooresponding requirement is arranged, can satisfy the all-year tire of many purposes function and performance like this and few.
Summary of the invention
The present invention proposes in order to address the above problem, and the objective of the invention is to, and the all-year tire of many purposes is provided, and can satisfy required performance under any condition of road surface.
To achieve the above object, the present invention is constructed as follows, having with central circumferential groove is in the tire of piece decorative pattern of symmetric form tire surface of benchmark, in the tire surface that is benchmark with above-mentioned central circumferential groove, between the central block and first pattern block, form first circumferential groove symmetrically, between first pattern block and second pattern block, form second circumferential groove, between the first above-mentioned circumferential groove and second circumferential groove, be formed with the first horizontal ditch, be formed with the second horizontal ditch in described second circumferential groove and tire shoulder side, wherein, the overall width of described tire surface is 130~250 millimeters, the width of center wheel tyre surface is 7~20 millimeters, the width of center wheel tyre surface: the width of first pattern block: the tire surface partial width of second pattern block is set in 1: 2.5: 3~1: 3: 3.5 the scope.
The explanation of preferred embodiment
Below, with reference to the accompanying drawings, to a preferred embodiment of the present invention will be described in detail.
Fig. 1 is the partial plan that shows according to tire surface structure of the present invention, and Fig. 2 is the cross sectional drawing of tire surface shown in Figure 1.
Of the present invention being constructed as follows, having with central circumferential groove is in the tire of piece decorative pattern of symmetric form tyre surface of benchmark, in the tire surface 2 that is benchmark with above-mentioned central circumferential groove 1, between the central block 4 and first pattern block 5, form first circumferential groove 3 respectively symmetrically, between first pattern block 5 and second pattern block 7, form second circumferential groove 6, between described first circumferential groove 3 and second circumferential groove 6, the vertical direction that forms with centre line C L is the inclined angle alpha that benchmark has about 20 °~60 ° of angles
1The first horizontal ditch 8, form inclined angle alpha with about 5 °~20 ° of angles in above-mentioned second circumferential groove 6 and tire shoulder 9 sides
2The second horizontal ditch 10.
The overall width TW of above-mentioned tire surface 2 is about 130~250 millimeters, the width TW1 of center wheel tyre surface is about 7~20 millimeters, the width TW1 of center wheel tyre surface: the width TW2 of first pattern block 5: the tire surface partial width TW3 of second pattern block 7 is set in 1: 2.5: 3~1: 3: 3.5 the scope.
And, being formed with 5 circumferential groove in the above-mentioned tire surface 2 altogether, the width and the degree of depth of above-mentioned first circumferential groove 3 and second circumferential groove 6 form multistage as depicted in figs. 1 and 2, are formed with the ditch of 2~3 sections step.
Here, forming step layer in first circumference 3 of 2 sections of above-mentioned formation, is benchmark with total depth SD, and the degree of depth f of first step maintains SD/2~SD/5 in first circumferential groove 3, and its width g is 1.5~3 millimeters.
And, in one side is that 2 sections, another side are to form step layer in 3 sections above-mentioned second circumferential groove 6, with total depth SD is benchmark, second circumferential groove 6 described is that first step degree of depth i is that SD/2~SD/5, second circumferential groove 6 described is that the degree of depth j of first step remains on SD/3~SD/5 in 3 sections the one side in 2 sections the one side, its width g, h form 1.5~3 millimeters, and whole SD is 7~15 millimeters a scope.
In addition, between above-mentioned first circumferential groove 3 and second circumferential groove 6, it is α that formation has along the leaning angle of the Width of tire
1The first horizontal ditch 8, this first horizontal ditch 8 has 2.5~6 millimeters width approximately, forms auxiliary ditch 11 in the both sides of first pattern block 5, is respectively 15~50 millimeters and 1~5 millimeter with the radius of first circumferential groove 3 and auxiliary ditch 11 bonded assemblys circle Ra and circle Rb.The radius R c of the auxiliary ditch 11 that forms in described first pattern block 5 is about 50~150 millimeters, first otch (kerf) 12a that has same radius with the radius R c of this auxiliary ditch 11 is arranged in this first pattern block 5, and is formed with angle and inclined angle alpha in described first pattern block 5
1Second identical, as to have certain-length otch 12b and the three cuts 12c, the second otch 12b and the first otch 12a interconnect.
Is α from above-mentioned second circumferential groove 6 to the leaning angle that tire width direction forms
2The second horizontal ditch 10 link to each other with described second circumferential groove 6, between this second horizontal ditch 10, be formed with second pattern block 7 of the piece of tire shoulder 9 sides, in this second pattern block 7, width is about 1.5~4 millimeters auxiliary ditch 12 and along the circumferential direction is connected with the second horizontal ditch 10, utilizes the 4th otch 12d and the 5th otch 12e with described second pattern block, 7 separated into two parts.
As shown in Figure 1, with the central circumferential groove 1 of tire surface 2 is that the central block 4 that benchmark is positioned at both sides has 20~40 millimeters width D altogether approximately, on the oblique line of Width, form the 6th otch 12f, the 6th otch 12f is along the circumferential direction uniformly-spaced cut apart central block 4, and is consistent with the rigidity equilibrium of adjacent block.
In addition, in order to keep drainage and snowfield performance, it is about 65~70% that ground connection is maintained than (being the area that the tire surface 2 of total area comparative tire contacts with ground), distributes and prevent abnormal wear to keep suitable earth contact pressure, keeps the ratio of predeclared each piece.
The figure of Fig. 3 and chart are the results of various performances of the tire of test the present invention and prior art, and the present invention compares with the tire of prior art as can be known, and the effect of various characteristics is all very good.
Described all-year tire according to the present invention is compared with existing all-year tire, and its function admirable required in multiple condition of road surface has the advantage that improves mobility as can be known.