CN102294942A - Tire with additional cap ply - Google Patents

Abstract

The invention discloses a tire with an additional cap ply. At least one layer of additional cap ply is additionally arranged between a second belted layer and a third belted layer to improve the anti-distortion and anti-tearing capabilities of a region during loading and stress bearing. Particularly, at least a layer of additional cap ply is respectively lined among a rubber pad, two sides of the third belted layer and a tread rubber. The additional cap ply is respectively wound on the sides of the third belted layer and the second belted layer at both sides of the tire periphery so as to optimize the grounding shape of the tire, improve the use safety performance, and effectively solve the problems of separation and tearing of the belted layer.

Description

Tire with additional band

Technical field

The present invention relates to the structural development of all-steel radial tyre, promptly circumferentially twine the additional band of one deck at least, belong to rubber tire and make the field around second bracing ply that delamination, fracture easily take place and the 3rd bracing ply side.

Background technology

The existing all-steel radial tyre of making usually, using, the crown of its kiss the earth is ellipse or oblong-shaped.After vehicle reached certain load, tire can correspondingly produce radially deformation, thereby the problem that more easily forms delamination between the bracing ply, fracture takes place, and seriously also can directly cause blowing out and brought train operation accident hidden danger.

By a large amount of discovering, in the tire running process, too concentrate and the zone that causes delamination, fracture in response to the force, at first occur between second bracing ply and the 3rd bracing ply, spread to adjacent domain then.Therefore how to improve the ability that pressure and deformation are born in this zone, reduce, will directly have influence on safety, smooth operation and the service life of tire because of the delamination that excessive deformation causes, the probability that breakage problem takes place.

Summary of the invention

The invention provides a kind of tire with additional band, be to address the above problem and defective and between second bracing ply and the 3rd bracing ply, set up at least the additional band of one deck, anti-deformation, lear energy when improving this zone load-carrying pressurized can balanced effectively distributions of stress along the additional band that the tire sidepiece circumferentially twines.

The objective of the invention is, improve the ability of this regional resistance to compression, anti-deformation between second bracing ply and the 3rd bracing ply, avoid, the safety performance when guaranteeing to run at high speed, prolong tire service life because of car load increases delamination, the breakage problem cause.

For achieving the above object, described tire with additional band in turn includes tread-rubber, the 4th bracing ply, the 3rd bracing ply, second bracing ply, pair of sidewall pad glue and first bracing ply from crown to wheel rim.

The difference with the prior art part is that between the dual-side and tread-rubber of pad glue, the 3rd bracing ply, liner has the additional band of one deck at least respectively.

In the circumferential both sides of tire, additional band 360 ° of ground respectively is wound in the side of the 3rd bracing ply, second bracing ply.

As above-mentioned basic improvement project, the additional band of being set up closely wraps the side of the 3rd bracing ply, second bracing ply respectively along the circumferential both sides of tire.When the trend of delamination, fracture occurring, additional band can be shared the stress on the 3rd bracing ply, second bracing ply effectively, avoids the stress point that acts on these 2 layers of bracing plys too concentrated.

For improving stretch-proof, the lear energy of additional band self further, also in order to improve the tight performance of connection when twining the 3rd bracing ply, second bracing ply, can take following improvement project simultaneously:

Described additional band is formed by 2 layers of nylon carcass plies overlap joint, and the length of every layer of nylon carcass plies is that (A), width are (I), makes progress in tire week, and the landing edge distance of 2 layers of nylon carcass plies (1) is (H),

Then $\frac{1}{12}\≤\frac{H}{A}\≤\frac{11}{12}$

2 layers of nylon cord by above-mentioned specification overlap joint upwards have higher stretch-proof performance tire week, also take into account the tear resistance that tire directly makes progress simultaneously.

Further the optimization measure is, the width of described the 3rd bracing ply is (D), and the width of second bracing ply is (C), and the width of the additional band after 2 layers of nylon carcass plies overlap mutually is (B),

Then $B>\frac{C-D}{2}$

By above-mentioned specification requirement, when 360 ° of ground were wound in the side of the 3rd bracing ply, second bracing ply respectively with additional band, additional band also can transmit radially reseting elasticity between the 3rd bracing ply, second bracing ply.When promptly certain radially deformation occurring, can reduce the radial deformation of the 3rd bracing ply, second bracing ply by additional band because of vehicle load, tire pressurized.

For improving the stable switching performance after 2 layers of nylon carcass plies overlap mutually, in every layer of nylon carcass plies (1), nylon cord is parallel with the side of nylon carcass plies;

Vertical severing angle of nylon carcass plies is smaller or equal to 90 °.

Consider the distribution of stress between the existing tire multilayer sizing material, the side distance of additional band in both sides and the 4th bracing ply is respectively more than or equal to 1 millimeter.

In sum, the advantage that tire had that the present invention has additional band is, can improve anti-deformation, lear energy between second bracing ply and the 3rd bracing ply by setting up the additional band of one deck at least, thereby reduce the delamination, the breakage problem that cause because of the car load increase effectively, tire stability and vehicle safety when assurance is run at high speed, and can prolong service life of tire.

Description of drawings

Fig. 1 is the scheme drawing of described additional band by 2 layers of nylon carcass plies overlap joint;

Fig. 2 is the cut-away structure chart of described tire;

Fig. 3 is the tire section scheme drawing;

As shown in Figure 1 to Figure 3, nylon carcass plies 1, additional band 2, tread-rubber 4, the 4th bracing ply 3, the 3rd bracing ply 5, second bracing ply 6, pad glue 7, first bracing ply 8;

In Fig. 1 and Fig. 3, A is the length of every layer of nylon carcass plies 1,

B is the width that 2 layers of nylon carcass plies 1 are overlapped to form additional band 2 mutually,

C is the width of second bracing ply 6,

D is the width of the 3rd bracing ply 5,

E is the side distance of additional band 2 and the 4th bracing ply 3,

F is the side of nylon carcass plies 1,

G is vertical severing angle of nylon carcass plies 1,

H is the landing edge distance of nylon carcass plies 1,

I is the width of every layer of nylon carcass plies 1.

The specific embodiment

Embodiment 1, as shown in Figure 1 to Figure 3, has the tire of additional band, in turn includes tread-rubber 4, the 4th bracing ply 3, the 3rd bracing ply 5, second bracing ply 6, pair of sidewall pad glue 7 and first bracing ply 8 from crown to wheel rim.

Wherein, between the dual-side and tread-rubber 4 of pad glue 7, the 3rd bracing ply 5, liner has one deck to add band 2 respectively.

Promptly in the circumferential both sides of tire, additional band 2 360 ° of ground respectively is wound in the side of the 3rd bracing ply 5, second bracing ply 6.

Additional band 2 is formed by 2 layers of nylon carcass plies, 1 overlap joint, nylon cord and side F keeping parallelism in every layer of nylon carcass plies 1, and vertical severing angle G of nylon carcass plies 1≤90 °.

Make progress in tire week,

The width of the additional band 2 after 2 layers of nylon carcass plies 1 overlap mutually

The side of additional band 2 in both sides and the 4th bracing ply 3 is apart from E 〉=1 millimeter.

When delamination, fracture trend appearred in the 3rd bracing ply 5, second bracing ply 6, additional band 2 can be shared the stress that is applied to it effectively, avoided stress point too to concentrate and the potential safety hazard of appearance.

Claims (5)

1. the tire with additional band in turn includes tread-rubber (4), the 4th bracing ply (3), the 3rd bracing ply (5), second bracing ply (6), pair of sidewall pad glue (7) and first bracing ply (8) from crown to wheel rim, it is characterized in that:

Between the dual-side and tread-rubber (4) of pad glue (7), the 3rd bracing ply (5), liner has the additional band (2) of one deck at least respectively,

In the circumferential both sides of tire, additional band (2) 360 ° of ground respectively is wound in the side of the 3rd bracing ply (5), second bracing ply (6).

2. the tire with additional band according to claim 1 is characterized in that: described additional band (2) is formed by 2 layers of nylon carcass plies (1) overlap joint, and the length of every layer of nylon carcass plies (1) is that (A), width are (I),

Make progress in tire week, the landing edge distance of 2 layers of nylon carcass plies (1) is (H),

Then $\frac{1}{12}\≤\frac{H}{A}\≤\frac{11}{12}.$

3. the tire with additional band according to claim 2, it is characterized in that: the width of described the 3rd bracing ply (5) is (D), the width of second bracing ply (6) is (C), and the width of the additional band (2) after 2 layers of nylon carcass plies (1) overlap mutually is (B)

Then $B>\frac{C-D}{2}.$

4. according to the tire with additional band of claim described 3, it is characterized in that: in every layer of nylon carcass plies (1), nylon cord is parallel with the side (F) of nylon carcass plies (1);

Vertical severing angle of nylon carcass plies (1) is (G), then G≤90 °.

5. according to claim 1,2,3 or 4 described tires with additional band, it is characterized in that: the side distance that both sides add band (2) and the 4th bracing ply (3) is E, then E 〉=1 millimeter.

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