Tire bead reinforcing structure

Abstract

The utility model belongs to the technical field of tires, and particularly relates to a tire bead reinforcing structure which comprises apex, a first steel wire ring is arranged in the apex, a tire body is wrapped on the outer side of the apex, steel wire wrapping cloth is wrapped on the outer side of the tire body, seam allowance rubber is wrapped on the outer side of the steel wire wrapping cloth, and a second steel wire ring is arranged in the seam allowance rubber. And sidewall rubber is arranged on the side surface of the seam allowance rubber. According to the utility model, the tire bead reinforcing component is additionally arranged in the components of the tire, consists of two layers of fiber cord fabrics and rubber materials, and is positioned between the outer side of the steel wire wrapping cloth and the sidewall rubber, so that the deformation resistance of the tire bead position can be improved, the damage to the tire bead caused by stress concentration at the turn-up endpoint of the tire body is eliminated, and the service life of the tire is prolonged. And in addition, a circle of steel wire ring with a smaller size is additionally arranged on the basis of an original circle of steel wire ring, so that the bonding strength between the tire and the hub can be improved, and the quality problems of empty tire, crack tire and the like are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tires, and specifically relates to a bead reinforcement structure. Background Art

[0002] The tire bead structure refers to the internal structure of the tire and is an important part for supporting the outer tire part. Generally speaking, the tire bead structure mainly includes the following parts: steel cord, carcass, bead, sidewall, chafing strip, etc. For example, the invention patent with the publication number CN102922956A discloses a tire bead structure, which includes a sidewall part and an inner liner. A steel ring and a triangular rubber strip are arranged at the center of the sidewall part and the inner liner. A carcass and a bead reinforcement layer are sequentially arranged outside the triangular rubber strip; the carcass includes a carcass main body part and a carcass turn-up part. The carcass turn-up part extends from the end of the carcass main body part and has a first turn-up end point. The carcass turn-up part wraps the steel ring and the end of the triangular rubber strip at one end of the steel ring.

[0003] However, when the existing bead structure is continuously used under high pressure for a long time, the bending deformation is large, and the turn-up carcass ply and the chafing strip of the wire at the position near the rim flange area are compressed and deformed, which easily forms stress concentration, resulting in quality problems such as bead void and bead crack in the tire. Therefore, improvement is needed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a bead reinforcement structure, which solves the problems of bead void and bead crack that easily occur in the existing bead structure.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a bead reinforcement structure, which includes a triangular rubber strip. A first steel ring is arranged inside the triangular rubber strip. A carcass is coated outside the triangular rubber strip. A chafing strip is coated outside the carcass. A chafing strip is coated outside the chafing strip. A sidewall rubber is arranged on the side of the chafing strip. The sidewall rubber contacts the end of the triangular rubber strip. A bead reinforcement component is jointly arranged between the sidewall rubber and the chafing strip.

[0006] Preferably, a second steel ring is arranged inside the triangular rubber strip, and the second steel ring contacts the first steel ring. By arranging the second steel ring, the strength of the first steel ring can be increased.

[0007] Preferably, the bead reinforcement component includes a first fiber ply. A second fiber ply is arranged on the surface of the first fiber ply. A rubber sheet is arranged on the surface of the second fiber ply. By arranging the bead reinforcement component, the anti-deformation performance of the tire bead position can be improved, the stress concentration at the carcass turn-up end point can be eliminated from damaging the tire bead, and the overall durability of the bead part can be improved.

[0008] Preferably, the surface of the second fiber cord layer is provided with tooth-shaped protrusions, and the tooth-shaped protrusions are embedded inside the rubber sheet. By providing the tooth-shaped protrusions, the tightness of the combination between the second fiber cord layer and the rubber sheet can be increased.

[0009] Preferably, the first fiber cord layer is in contact with both the chafer gum and the sidewall gum. The first fiber cord layer is used as the outermost layer of the bead reinforcement assembly.

[0010] Preferably, the rubber sheet is in contact with the apex rubber, and the second fiber cord layer is in contact with the wire wrap. The second fiber cord layer is used as the connection layer with the wire wrap.

[0011] The beneficial effects of the present utility model are as follows:

[0012] By adding a bead reinforcement assembly inside the components of the tire, the bead reinforcement assembly is composed of two layers of fiber cord and rubber compound, which is located between the outside of the wire wrap and the sidewall gum. This structure can improve the anti-deformation performance of the tire bead position, eliminate the stress concentration at the anti-turnup end point of the carcass and damage to the tire bead, and improve the overall durability of the bead part. In addition, on the basis of the original one circle of wire bead, an additional circle of wire bead with a smaller size is added, which can further improve the bonding strength between the tire and the wheel hub, and avoid quality problems such as tire bead void and bead crack. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0014] Figure 2 is of the present utility model Figure 1 schematic diagram of the bead reinforcement assembly structure.

[0015] In the figure: 1, apex rubber; 2, wire wrap; 3, carcass; 4, chafer gum; 5, wire bead one; 51, wire bead two; 6, sidewall gum; 7, bead reinforcement assembly; 8, first fiber cord layer; 9, second fiber cord layer; 91, tooth-shaped protrusions; 10, rubber sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1, a bead reinforcement structure, comprising a chafer 1, inside which there is a first bead wire 5, the outside of the chafer 1 is covered with a carcass 3, the outside of the carcass 3 is covered with a wire wrap 2, the outside of the wire wrap 2 is covered with a chafing strip 4, on the side of the chafing strip 4 there is a sidewall rubber 6, the sidewall rubber 6 contacts the end of the chafer 1, inside the chafer 1 there is a second bead wire 51, and the second bead wire 51 contacts the first bead wire 5. By providing the second bead wire 51, the strength of the first bead wire 5 can be increased.

[0018] Please refer to Figure 1 , Figure 2 , between the sidewall rubber 6 and the wire wrap 2 there is jointly provided a bead reinforcement assembly 7. The bead reinforcement assembly 7 includes a first fibrous cord layer 8, on the surface of the first fibrous cord layer 8 there is a second fibrous cord layer 9, on the surface of the second fibrous cord layer 9 there is a rubber sheet 10. By providing the bead reinforcement assembly 7, the anti-deformation performance of the tire bead position can be improved, the stress concentration at the end of the carcass 3's reverse wrapping can be eliminated from damaging the tire bead, and the overall durability of the bead part can be improved. On the surface of the second fibrous cord layer 9 there are tooth-shaped protrusions 91, and the tooth-shaped protrusions 91 are embedded inside the rubber sheet 10. By providing the tooth-shaped protrusions 91, the tightness of the combination between the second fibrous cord layer 9 and the rubber sheet 10 can be increased. The first fibrous cord layer 8 contacts both the chafing strip 4 and the sidewall rubber 6. The first fibrous cord layer 8 is used as the outermost layer of the bead reinforcement assembly 7. The rubber sheet 10 contacts the chafer 1, and the second fibrous cord layer 9 contacts the wire wrap 2. The second fibrous cord layer 9 is used as the connection layer with the wire wrap 2.

[0019] The specific implementation process of the present utility model is as follows: Add a bead reinforcement assembly 7 between the outside of the wire wrap 2 and the sidewall rubber 6. The first fibrous cord layer 8 in the bead reinforcement assembly 7 contacts the chafing strip 4 and the sidewall rubber 6, the rubber sheet 10 contacts the chafer 1, and the second fibrous cord layer 9 contacts the wire wrap 2. This structure can improve the anti-deformation performance of the tire bead position, eliminate the damage to the tire bead caused by the stress concentration at the end of the carcass 3's reverse wrapping, and improve the overall durability of the bead part. In addition, on the basis of the original one circle of bead wire, add a circle of bead wire with a smaller size, thereby improving the strength of the combination between the tire and the wheel hub.

[0020] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tire bead reinforcement structure, comprising an apex rubber (1), characterized in that: The apex rubber (1) is provided with a first steel wire ring (5) inside, the apex rubber (1) is covered with a carcass (3) on the outside, the carcass (3) is covered with a wire cloth (2) on the outside, the wire cloth (2) is covered with a sprocket rubber (4) on the outside, a sidewall rubber (6) is provided on the side of the sprocket rubber (4), the sidewall rubber (6) is in contact with the end of the apex rubber (1), a tire bead reinforcement component (7) is provided between the sidewall rubber (6) and the wire cloth (2), and a second steel wire ring (51) is provided inside the apex rubber (1), and the second steel wire ring (51) and the first steel wire ring are connected to each other. (5) contact, the tire bead reinforcement component (7) comprises a fiber cord layer 1 (8), a fiber cord layer 2 (9) is arranged on the surface of the fiber cord layer 1 (8), a film (10) is arranged on the surface of the fiber cord layer 2 (9), a tooth-shaped protrusion (91) is arranged on the surface of the fiber cord layer 2 (9), and the tooth-shaped protrusion (91) is embedded in the interior of the film (10), the fiber cord layer 1 (8) is in contact with both the tip rubber (4) and the sidewall rubber (6), the film (10) is in contact with the apex rubber (1), and the fiber cord layer 2 (9) is in contact with the wire cloth (2).

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