CN103786527A

CN103786527A - Radial tire

Info

Publication number: CN103786527A
Application number: CN201310744065.2A
Authority: CN
Inventors: 卢南江; 阳安荣
Original assignee: China National Tyre and Rubber Guilin Co Ltd
Current assignee: China National Tyre and Rubber Guilin Co Ltd
Priority date: 2013-12-30
Filing date: 2013-12-30
Publication date: 2014-05-14

Abstract

The invention discloses a radial tire which comprises a tire body layer, a tire bead reinforcing layer, a bead ring and a rubber core, wherein the rubber core is connected to the upper end of the bead ring; the tire body layer comprises a tire body layer main body part and a tire body layer reversely-covered part; one end of the tire body layer reversely-covered part, on the outer side of the tire, is a first reversely-covered end; the tire body layer is externally coated with the bead ring reinforcing layer; one end of the bead ring reinforcing layer, on the outer side of the tire, is a second reversely-covered end; the second reversely-covered end is below the first reversely-covered end; the radial tire is also provided with a transition layer; the transition layer is contacted with the outer sides of the first and second reversely-covered ends and extends upwards and downwards, and a lower end point of the transition layer is above a joint of a wheel flange of a rim and the tire. By additional arrangement of the transition layer, a stress concentrated in an area between the first reversely-covered end and the second reversely-covered end is dispersed to the areas at the two ends of the transition layer, thus stress concentration is reduced, the performances of the tire are improved, and the service life of the tire is prolonged.

Description

One meridian line tyre

Technical field

The present invention relates to tyre technology, be specifically related to a meridian line tyre.

Background technology

At present, common radial-ply tyre, especially the carcass anti-package structure of all-steel load-bearing radial tire, mostly be to adopt in carcass outside or the mode of 1～2 layer of cord infantees of inner side increase, although such structure has strengthened the rigidity at steel ring position, strengthen tyre bead, but due to the existence of the clamping force of cord rigidity and wheel rim, in the time there is deformation, inhomogeneous in the place's transition of carcass anti-package, cause stress to be concentrated, so that carcass anti-package end points place occur to damage in advance, cause breaking of tire, affected the life-span of tire.

Summary of the invention

The technical problem to be solved in the present invention is to provide a meridian line tyre, can make the transition of stress at body piles anti-package position more even, reduces the stress at body piles anti-package end points place and concentrates, thereby improve tyre performance and service life.

For solving the problems of the technologies described above, the present invention by the following technical solutions:

One meridian line tyre, comprises body piles, tyre bead enhancement Layer, bead coil and glue core, and glue core is connected in bead coil upper end; Described body piles comprises body piles main part and body piles turnup, body piles main body section is in tire inner side and extend to bead coil, body piles turnup extends and walks around bead coil anti-package to tire outside from body piles main part, and its one end that is positioned at tire outside is the first anti-package end; Described tyre bead enhancement Layer is wrapped in outside body piles, jointly encase with body piles one end that bead coil and glue core are connected with bead coil, its one end that is positioned at tire outside is the second anti-package end, the second anti-package end is positioned under the first anti-package end, its difference is: this radial-ply tyre is also provided with cambic horizon, described cambic horizon contacts with the outside of first, second anti-package end and extends up and down, its lower extreme point rim and tire on chalaza.

Preferably, described cambic horizon is 30 °～70 ° with respect to the cord angle of tire radius direction, and the width of cambic horizon is 20～60mm, can make the dispersing action of cambic horizon counter stress better.

Preferably, the center of described cambic horizon is mutually concordant with the line center of first, second anti-package end, can make stress average mark be dissipated to the two ends of cambic horizon.

In addition, between described body piles and tyre bead enhancement Layer, be preferably provided with one deck film, even to guarantee the shearing force transition between body piles turnup and tyre bead enhancement Layer; The thickness of described film is preferably 2～4mm.

Preferably, described glue core is made up of the flexible glue portion on top and the ebonite portion of bottom.

Preferably, described tyre bead enhancement Layer and cambic horizon all adopt steel cord, to guarantee the rigidity at steel ring position.

Compared to the prior art, advantage of the present invention is:

Radial-ply tyre of the present invention, by increasing the mode of cambic horizon, will concentrate on the stress in region between the first anti-package end and the second anti-package end originally, was distributed to the region at cambic horizon two ends, had reduced stress and had concentrated; Meanwhile, cambic horizon lower extreme point is opened and and close edge higher than wheel rim, thereby is not fettered by wheel rim; In addition, between body piles and tyre bead enhancement Layer, one deck film is set, makes body piles and the transition of tyre bead enhancement Layer shearing force more even.These improvement have avoided tire to be damaged too early, have improved tyre performance and service life.

Accompanying drawing explanation

Fig. 1 is the structural representation of the preferred embodiment of the present invention.

Number in the figure is: 1, body piles; 1-1, body piles main part; 1-2, body piles turnup; 1-3, the first anti-package end; 2, tyre bead enhancement Layer; 2-1, the second anti-package end; 3, bead coil; 4, glue core; 4-1, flexible glue portion; 4-2, ebonite portion; 5, cambic horizon; 6, film.

The specific embodiment

Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.

As shown in Figure 1, the radial-ply tyre of the present embodiment, comprises body piles 1, tyre bead enhancement Layer 2, bead coil 3, glue core 4, cambic horizon 5 and film 6.Glue core 4 is made up of the 4-1 of flexible glue portion on top and the 4-2 of ebonite portion of bottom, and it is connected in bead coil 3 upper ends, and the lower end of the 4-2 of ebonite portion is connected with bead coil 3.Body piles 1 comprises body piles main part 1-1 and body piles turnup 1-2, body piles main part 1-1 is positioned at tire inner side and extends to bead coil 3, body piles turnup 1-2 extends and walks around bead coil 3 anti-packages to tire outside from body piles main part 1-1, and its one end that is positioned at tire outside is the first anti-package end 1-3.Tyre bead enhancement Layer 2 is wrapped in outside body piles 1, jointly encases with body piles 1 one end that bead coil 3 and glue core 4 are connected with bead coil 3, and its one end that is positioned at tire outside is the second anti-package end 2-1, and the second anti-package end 2-1 is positioned under the first anti-package end 1-3.Film 6 is arranged between body piles 1 and tyre bead enhancement Layer 2.Cambic horizon 5 contacts with the outside of the first anti-package end 1-3 and the second anti-package end 2-1 and extends up and down, its lower extreme point rim and tire on chalaza.

Wherein, described cambic horizon 5 is 30 °～70 ° with respect to the cord angle of tire radius direction, and the width of cambic horizon 5 is 20～60mm; And the center of cambic horizon 5 is mutually concordant with the line center of the second anti-package end 2-1 with the first anti-package end 1-3.The thickness of described film 6 is 2～4mm.Described tyre bead enhancement Layer 2 and cambic horizon 5 all adopt steel cord.

Claims

1. a meridian line tyre, comprises body piles (1), tyre bead enhancement Layer (2), bead coil (3) and glue core (4), and glue core (4) is connected in bead coil (3) upper end; Described body piles (1) comprises body piles main part (1-1) and body piles turnup (1-2, body piles main part (1-1) is positioned at tire inner side and extends to bead coil (3), body piles turnup (1-2) extends and walks around bead coil (3) anti-package to tire outside from body piles main part (1-1), and its one end that is positioned at tire outside is the first anti-package end (1-3); Described tyre bead enhancement Layer (2) is wrapped in outside body piles (1), jointly encase with body piles (1) one end that bead coil (3) and glue core (4) are connected with bead coil (3), its one end that is positioned at tire outside is the second anti-package end (2-1), the second anti-package end (2-1) is positioned under the first anti-package end (1-3), it is characterized in that: be also provided with cambic horizon (5), described cambic horizon (5) contacts with the outside of first, second anti-package end (1-3,2-1) and extends up and down, its lower extreme point rim and tire on chalaza.

2. radial-ply tyre according to claim 1, is characterized in that: described cambic horizon (5) is 30 °～70 ° with respect to the cord angle of tire radius direction, and the width of cambic horizon (5) is 20～60mm.

3. radial-ply tyre according to claim 1, is characterized in that: the center of described cambic horizon (5) is mutually concordant with the line center of first, second anti-package end (1-3,2-1).

4. radial-ply tyre according to claim 1, is characterized in that: between described body piles (1) and tyre bead enhancement Layer (2), be provided with one deck film (6).

5. radial-ply tyre according to claim 4, is characterized in that: the thickness of described film (6) is 2～4mm.

6. radial-ply tyre according to claim 1, is characterized in that: described glue core (4) is made up of the flexible glue portion (4-1) on top and the ebonite portion (4-2) of bottom.

7. radial-ply tyre according to claim 1, is characterized in that: described tyre bead enhancement Layer (2) and cambic horizon (5) all adopt steel cord.