CN1005140B

CN1005140B - Pneumatic vehicle tire

Info

Publication number: CN1005140B
Application number: CN85107985.7A
Authority: CN
Inventors: 迪特尔·罗德; 西格弗里德·普里托里亚斯
Original assignee: Continental Gummi Werke AG
Current assignee: Continental AG
Priority date: 1985-10-23
Filing date: 1985-10-23
Publication date: 1989-09-13
Also published as: CN85107985A

Abstract

The present invention is about there being the belted tire of step part, and step part is connected with the both sides of tyre surface striate region, and band edge reaches the surperficial below of the approximate horizontal of step part.In order to eliminate issuable unfavorable heating, thus reduce to roll resistance, the present invention proposes a kind of low resistance rubber layer being placed between string course, but this rubber layer before the portion of the limit at band edge till.In this region, increase the prolongation of a rubber tape as above-mentioned interlayer, a half width of this rubber tape is placed between string course, and second half protrudes upward the outside of band in side.The hardness of this rubber layer is greater than this low resistance interlayer.

Description

Pneumatic vehicle tire

The present invention is about for motor vehicle air-inflation tyre, between tyre surface striped and arc carcass plies, there is substantially inextensible band, there is the part of widening of shoulder shape in the both sides of tyre surface striate region, the above-mentioned part of widening is formed by step part, the contact of discord road, the sidewall of tire starts arc ground from the part of widening and is stretched over inwards tyre edge, in this tire, the edge of band is stretched in the region of widening part outstanding with vertical surface the side direction of widening the step in part, outstanding distance, approximately be equivalent to the solstics beyond the outstanding dry step vertical surface of tire bulging sidewall distance 25% to 40%.

Such Pneumatic vehicle tire, produces the advantageous effect that tyre surface striate region is strengthened, thereby gives the favourable wear resisting property of tyre surface striped.In addition, in the time having vibrations, there are the shoulder of step and wider band combination, the sidewall part of tyre surface striped part and tire is disconnected.

Basic object of the present invention, is that above-mentioned tire is made improvements, and makes the inevitable distortion of tyre surface striate region, does not produce disadvantageous heating, and a subsidiary object is the resistance of the rolling while reducing distortion.

In order to reach this object, according to proposed by the invention, there is a low resistance rubber layer to be placed between at least two string courses, the wall thickness of above-mentioned rubber layer is at least about the diameter that is equivalent to band reinforcement, but the thickness of wall is no more than 5mm; Above-mentioned rubber layer is roughly stretched over the plane of tire both sides, this plane is determined by the vertical surface of step, in the edge part of two bands, one half width of the above-mentioned blade part of extension that above-mentioned softer rubber layer is connecting strip knife edge part, still be clipped between string course, and a half width of stretching out further puts in the part of widening, thereby still extend laterally, exceed the basic ledge surface for level.

Key factor is here the terms of settlement that can not offer the best in the middle of the low resistance extending on the whole width of band, because this low resistance interlayer can not fully be absorbed in the stress producing in band marginarium.Because this cause except arranging in band marginarium above-mentioned low resistance rubber layer, connects a strip blade part on band marginarium, form the extension part of a low resistance interlayer.When the half width above-mentioned rubber strip is clipped between string course, and while remaining half width being extended to below the step part in the shoulder of tire, if be placed on the additional rubber strip in band marginarium, can improve most effectively the endurance strength in band marginarium.It is unexpected that the obvious fact be: use the above-mentioned strip blade part relatively harder than additional low resistance layer, and the above-mentioned buffer action of not very big impact, the namely effect of low resistance interlayer.Its result, outside good buffer action, also can obtain good endurance strength or the rigidity of band marginarium.

The more details of the present invention, is set forth one embodiment of the invention with reference to the accompanying drawings hereinafter.Accompanying drawing prospectus is as follows:

Fig. 1 is the local radial cutaway view by a Pneumatic vehicle tire;

Fig. 2 is done in scope by long and short dash line in Fig. 1, by the radially cutaway view Amplified image of tire shoulder.

Tire body is made with the material of rubber or rubber like substantially.Tire is strengthened with the enhancement Layer imbedded, by sulfuration method enhancement Layer and rubber or similar substance mortise.Bead core 3 is walked around in the edge of arc carcass plies 1, be fixed on 2 li of tyre edges.The outward flange of tyre surface striate region 4, determines scope by the surface 5 of tyre surface striped.Between above-mentioned tyre surface striate region 4 and arc carcass plies 1, there is a band 6, substantially can not extend in a circumferential direction, and the inside comprise four combs knit layer 7, stack layer by layer, each comb is knitted the reinforcement placement parallel to each other of 7 li, layer, but each comb is knitted each stiffener assembly of 7 li, layer, with respect to adjacent carcass plies, there is different angles in a circumferential direction.

Preferably above two pairs of combs to knit layer be a direction, below two pairs of combs to knit layer be another direction, form symmetrical cross support.

The width of tire represents by B, and tire height represents with H.The tire of narrating in this specification sheets is for motor vehicle for commodity, and the ratio of H and B is less than 85%.

The step part 8 of the both sides of the tyre surface striate region 4 proposing by the present invention is very important.Step has one to be columniform lower surface 9 substantially, and stretch on the surface 5 that is basically parallel to tyre surface striped, and has one to be vertical ledge surface 10 substantially, and ledge surface 10 determines the Effective width one Effective width L of tyre surface striate region 4 _erepresent.

Measuring of step part 8 is as follows: consider the section structure shape of tyre surface striate region 4, under the common condition of advancing, lower surface 9 road of getting along well contacts simultaneously.

The band width measuring on the only about half of height of tire section is G _b, the maximum width of tire body is B, it is with each other with respect to the width L of tyre surface striate region _b, should there is following particular kind of relationship:

Selecting of width 8 is as follows:

，

But best radix is 0.3.This means that the region Z that band edge tilt stretches in carcass plies 1 is quite little, preferably approximately just band edge stretches out the twice of the distance of step vertical surface 10 outsides.The result arranging like this, just there is a corresponding little support rubber layer, form is as common support rubber band, just enough.And it is prominent that the width B of tire produces a larger drum.

Ledge structure shape recited above, and above-mentioned shoulder structure shape cooperation after listed various features, make the resistance to rolling have sizable decline below combining.

Between a pair of string course 6 below a pair of string course 6 and other direction on unidirectional, establish and put rubber layer 11, above-mentioned rubber layer 11 is formed by an Intermediate Gray 12 and two avris bands 13.The width b of avris band 13 approximates band width G _b1/6.In addition, avris band 13 is surrounded by band, makes a half width of avris band 13 be sandwiched in comb and knits between layer 7, and remaining half width is stretched out the outside of band 6, and namely avris band 13 puts in shoulder district, near the below on the surface 9 of step part 8.Like this, the edge part of stretching out of stretching out band 6 outsides of avris band 13, the planform correspondence of planform fundamental sum carcass plies shoulder regions.

The rebound Xiao A hardness of Intermediate Gray 12 between 40 and 50, preferably Shore number 48.But, the hardness of avris band 13 between 58 and 80, be preferably about Xiao A hardness 65 and 70 between.In addition, be placed in shoulder district, around the rubber layer of avris band 13, hardness is roughly low by 5 to 15 than the Xiao A hardness number of avris band 13, the therefore hardness of tyre surface striate region 4, be preferably in Shore A number 60 to 65 between.

Intermediate Gray 12 should have 60% to 70% rebound elasticity (measuring by Deutsche lndustrie-Norm DIN53512); The rebound elasticity of avris band 13 is between 40% to 50%, and the rebound elasticity of tyre surface striate region 4 is 40%.Therefore, around the rebound elasticity of the rubber layer of outer stripe edge, approximately low by 10% to 30% than the rebound elasticity of Intermediate Gray 12.

Claims

1, a kind of Pneumatic vehicle tire, between tyre surface striate region and arc carcass plies, there is substantially inextensible band, in the both sides of tyre surface striate region, there is the part of widening of shoulder shape, the above-mentioned part of widening is formed by a step part, widen the road contact of partly getting along well, the sidewall arc ground of tire is from the above-mentioned part of widening, inwardly stretch to tyre edge, the limit that is characterized as band reaches the vertical surface of widening part district and widening the step of part, and extend laterally, the distance of stretching out is approximately equivalent to tire bulging sidewall, protrude from the solstics beyond step vertical surface distance 25% to 40%, be characterized as a low resistance rubber layer (12), hardness is approximately 40 to 50 of Xiao A hardness, be placed between at least two string courses (7), the thickness of above-mentioned rubber layer (12), at least about the diameter that is equivalent to band stiffener assembly, but wall thickness is no more than 5mm, above-mentioned rubber layer (12) is stretched in the plane of tire both sides substantially, this plane is determined by the vertical surface (10) of step, the strip knife edge part (13) that hardness is about Shore A hard 58 to 80 is connected on the above-mentioned softer rubber layer in two band fringe regions to be become and extends part, one half width of above-mentioned blade part (13) is still placed between string course, one half width of extending further reaches in the part of widening, and to extending laterally, exceed the ledge surface (9) of the level of being essentially.

2, a kind of tire described in 1 of claim the, is characterized as side direction and reaches some parts of the blade part (13) of band (6) outside, and arc ground turning-in, is arranged essentially parallel to tire arc carcass plies (1) and stretches.

3, a kind of tire described in 1 of claim the, the width (b) that is characterized as blade part (13) is equivalent to 1/6 of band width substantially.

4, a kind of tire described in 1 of claim the, the rebound elasticity that is characterized as blade part (13) is (DIN53512) 40% to 50%, the rebound elasticity that is placed on the rubber layer (12) in the middle of two blades parts (13) is 60% to 70%.

5, a kind of tire described in 1 of claim the, is characterized as around the rubber layer in the tire shoulder district of blade part (13), soft more a lot of than blade part (13), nonhomogeneous hardness between the two, about Shore A numerical value 5 to 15 between change.