CN204249743U - A kind of all-steel radial tyre of steel wire infantees composite members reinforced bead - Google Patents

Abstract

The utility model relates to an all-steel radial tire which uses steel wire cloth composite parts to strengthen the bead. The tire includes a tire crown, a tire shoulder, a carcass ply, an inner liner, a belt layer and a bead; the bead includes a steel wire ring, Apex and wear-resistant glue. The tire carcass ply wraps the bead ring upside down, and the outer side is provided with a U-shaped steel wire cloth composite part that completely wraps the bead ring structure. The inner side of the steel wire cloth is attached between the carcass cord and the inner liner, and the inner end point is slightly lower than the turn-up end point of the carcass cord; the outer side of the steel wire cloth is attached between the carcass cord and the wear-resistant rubber. The edge of the outer turn-up of the steel wire-wrapped cloth is covered with rubber and a layer of film is pasted inside, and the outer turn-up end point of the steel wire-wrapped cloth is higher than the turn-up end point of the carcass cord. The utility model improves the transition between the bead and the soft sidewall, effectively prevents stress concentration, enhances the high-load resistance strength of the bead, strengthens the durability and wear resistance of the bead, and reduces the defects of the bead. Second, it reduces the safety hazards of tires in overloading, regional roads, etc., improves the service life of tires, and the scheme is easy, economical and reliable.

Description

An all-steel radial tire with bead reinforced by steel wire-wrapped composite parts

technical field

The utility model relates to the manufacturing field of all-steel radial tires, in particular to an all-steel radial tire and a preparation method for adjusting the bead steel wire wrapping structure.

Background technique

Radial tires came out in the 1940s. Due to the excellent performance brought by its unique structure, after more than half a century of development, the tires have gradually become radial. Radial tires have experienced a long and tortuous development, and now they are becoming more and more flat, tubeless, high-speed, environmentally friendly and functional. With the development of the automobile industry, the performance requirements for tires are getting higher and higher. All-steel radial tires with advantages such as good handling performance, low rolling resistance, fuel saving and good durability and wear resistance have become the main force in the tire industry. However, during the running of all-steel radial tires, cracks and deformations often occur at the bead (spigot), which becomes the frequent site of tire diseases, and research affects the performance and service life of the tire. Therefore, the improvement of the structural design of the bead portion has become an important subject of tires in the world.

The carcass cords of radial tires are radially arranged, the number of carcass plies is small, the sidewalls are soft, the bead rigidity is insufficient, and the force resistance is poor. Therefore, when driving under high-speed and high-load conditions, the bead often becomes the first part of the tire to be damaged. Therefore, the bead must be strengthened, but at the same time, it must be considered how to make a suitable rigid transition between the reinforced bead and the soft sidewall, so as to prevent stress concentration from causing delamination, fracture or breakage of the bead etc. damage.

Since the 1980s in my country's tire industry, all-steel radial tires have developed rapidly, keeping up with the pace of developed countries in the world, and have great production and market potential. At the same time, the number of tires I have passed is large but the homogeneity is serious, which often cannot meet the requirements of actual use. With the development of my country's economy, the transportation industry is also thriving, thus changing the traditional transportation mode: from low-tonnage, low-speed to high-tonnage, high-speed; from short-distance to long-distance or ultra-long-distance heavy-duty vehicles.

The existing all-steel radial steel cloth structure often uses one-sided glue, which will lead to poor adhesion between the outer end of the steel cloth and the carcass cord: on the one hand, the end of the turn-up produces stress concentration, resulting in The end point is cracked outward; on the other hand, due to poor adhesion, the end point of the wear-resistant rubber on the sidewall will be bent inward, resulting in disease. At the same time, the turn-up ends of the steel wire cloth and the carcass cord are often very close, which is prone to stress concentration and excessive heat generation, which will cause rupture at the slit.

Chinese Utility Model Patent (Application No.: 200820149422.5) discloses a slit reinforcement structure for all-steel radial tires, which is characterized in that the end point of the carcass ply turned up is higher than the outer end of the slit steel wire wrap; the carcass ply is turned up An end-sealing rubber strip is arranged above the end point and the outer end point of the zikou steel wire cloth, and the end-sealing rubber strip completely seals the carcass ply reverse-wrapped end point and the outer end point of the zikou steel wire cloth. This strengthening method focuses on strengthening the weak parts of the rim, but on the one hand, because the outer end point of the rim steel wire cloth is lower than the end point of the carcass ply turn-up, the reinforcing effect of the steel ladle on the bead is weakened; Rubber strips are used to seal the ends, and there are problems such as difficult positioning and difficult construction in the production process, which requires high technological requirements.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art, and provide an all-steel radial tubeless tire with one side of the steel cloth covered with rubber and laminated with a film to strengthen the steel ring.

In order to achieve the above object and overcome the deficiencies in the prior art, the utility model adopts the following technical solutions:

An all-steel radial tire whose bead is reinforced with steel wire cloth, its structure includes a crown, a shoulder, a carcass ply, an inner liner, a belt layer and a bead; Grinding rubber; steel wire cloth composite parts include steel wire cloth, edge rubber and film. The carcass ply turn-up traveler is characterized in that: the inner side of the steel wire wrapping cloth is attached between the carcass ply and the inner liner, and the inner end point is lower than the turn-up end point of the carcass ply; The outer side of the cloth is pasted between the carcass ply and the wear-resistant rubber, and the outer edge of the steel wire wrapped cloth is covered with glue and a layer of film is attached, that is, the edge wrapping rubber and the same side of the film, and the steel wire wrapped cloth The outer turn-up end point is higher than the turn-up end point of the carcass cord, and the steel wire wrapped cloth bypasses the steel traveler, and the cross section is U-shaped.

Preferably, the level difference between the outer end point of the steel wire cloth and the turn-up end point of the carcass ply is 10-15mm, and the level difference between the inner end point and the turn-up end point of the carcass ply is 0-5mm.

Preferably, the steel wire cord of the steel cloth has a width of 100-150mm and a thickness of 1-2mm.

Preferably, the width of the wrapping glue at the outer turned-up edge of the steel wire cloth is 20-40mm, and the thickness is 0.5-1.5mm; the width of the laminated film is 40-60mm, and the thickness is 1-3mm, wherein the outer edge of the film The distance from the wire wrapped cloth is 10-30mm.

Preferably, the steel cords of the steel cloth are made of high elongation steel wires with a breaking force of 1000-1500 N.

Preferably, both the steel wire cloth and the steel wire are composed of parallel steel wire and rubber, and the steel wire has an angle of 30-50° with the circumferential direction of the tire.

A method for preparing an all-steel radial tire reinforced with a steel wire-wrapped composite part, mainly comprising the following steps:

1) Pre-preparation of steel wire-wrapped composite parts: the oblique cutting machine cuts the ladle cord obliquely at an angle of 30-50°; The sticking machine is then compounded with a layer of film;

2) When the tire embryo is formed, the two steel wire-wrapped composite parts are transferred to the forming drum through a mechanical device;

3) Lay two steel wire-wrapped composite parts on the inner liner, and ensure that the part of the composite part where the film is pasted faces outward, and the angle of the steel wires of the two steel wire-wrapped cloths is in the shape of "eight";

4) Lay the carcass cord symmetrically again, and carry out the rest of the forming steps;

5) After molding, the tire is vulcanized, inspected and packaged.

The beneficial effects of the utility model are as follows:

Firstly, the outer end of the steel wire cloth is higher than the turn-up end of the carcass ply, which can further strengthen the bead as a whole. Secondly, on the one hand, the laminating film can increase the adhesion between the carcass and the sidewall and prevent them from detaching from each other; The phenomenon of pleats at the ends of the wear-resistant rubber caused by poor fit has greatly reduced the incidence of sidewall disease in the process. At the same time, the unilateral rubber covering can well relieve the stress concentration at the end of the steel wire cloth, disperse the shear stress, prevent the slit from cracking, and improve the safety performance of the tire. In addition, the transition film between the laminated film and the sidewall closes the end of the turn-up symmetrically around the end of the turn-up of the ladle, which further disperses the shear stress at the end of the turn-up and makes it difficult to crack outwards. This technology effectively strengthens the load resistance and durability of the bead, enhances the rigid transition between the carcass and the sidewall, improves the safety performance of the tire, reduces the return rate, and is economical and easy to increase for the company. benefits.

The utility model improves the transition between the bead and the soft sidewall by improving the structure of the steel wire cloth, that is, the design of a steel wire cloth composite part, effectively prevents stress concentration, and enhances the high load resistance of the bead , enhance the durability and wear resistance of the bead, reduce the number of diseases at the bead, reduce the safety hazards of the tire in overloading, regional roads, etc., improve the service life of the tire, and the scheme is easy, economical and reliable.

The utility model improves the structure of the steel wire wrapped cloth. After the product trial production and the bead durability test, compared with the experimental data of the normal tire, this technology effectively strengthens the bead durability and effectively improves the 100- 245%, as shown in Table 1. Enhanced rigid transition between carcass and sidewall, while effectively reducing fuel consumption. The technical scheme of the utility model is easy to implement in technology, has strong operability and practicability.

Table 1: Bead Durability Test

Description of drawings

Fig. 1 is the bead structure schematic diagram of the utility model radial tire;

Fig. 2 is the semi-finished product diagram of the steel wire cloth of radial tire of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and preferred embodiment, to its specific implementation, structure, feature and effect according to the utility model patent, describe in detail as follows.

An all-steel radial tire with a bead reinforced with steel wire cloth, the structure of which includes a crown, a tire shoulder, a carcass ply (1), an inner liner (2), a belt layer, a steel wire cloth composite part and a tire lock up. As shown in Figure 1, the carcass ply (1) turns up the traveler (4), and the inner side of the steel wire cloth (6) is attached between the carcass ply (1) and the inner liner (2), and the inner side The end point is slightly lower than the turn-up end point of the carcass ply (1); the outer side of the steel wire cloth (6) is attached between the carcass ply (1) and the wear-resistant rubber (5), and the steel wire cloth (6) ) at the edge of the outer turn-up and attach the upper layer of film, that is, the edge-wrapping rubber (7) and the film (8) on the same side, and the outer turn-up end point of the steel wire cloth is higher than the turn-up end point of the carcass cord . The steel wire cloth (6) walks around the steel traveler section (4), and the section is U-shaped. The step difference between the outer end point of the steel wire cloth (6) and the turn-up end point of the carcass ply is 10-15mm, and the step difference between the inner end point and the turn-up end point of the carcass ply (1) is 0-5mm. The steel cord of the steel cloth (6) adopts high elongation steel wire, its breaking force is 1000-1500 N, the width is 100-150mm, the thickness is 1-3mm, and the width of the wrapping glue at the edge of the outer turn-up is 20 -40mm, the thickness is 0.5-1.5mm; the width of the laminated film is 40-60mm, and the thickness is 1-3mm. Wherein the distance between the outer edge of the film (8) and the wire cloth (6) is 10-30mm. The steel wire cloth is composed of parallel steel wire and rubber, and the steel wire has an angle of 30-50° with the tire circumferential direction.

The method for manufacturing the innerless radial tire adopting the bead structure of this design mainly includes the following steps:

1) Pre-preparation of steel wire-wrapped cloth composite parts: according to the above implementation requirements, the oblique cutting machine cuts the steel ladle cord obliquely at an angle of 30-50°; The same side of the film is compounded with a layer of film by the applicator;

2) When the tire embryo is formed, the two steel wire-wrapped composite parts are transferred to the forming drum through a mechanical device;

3) Lay two steel wire-wrapped composite parts on the inner liner, and ensure that the part of the composite part where the film is pasted faces outward, and the angle of the steel wires of the two steel wire-wrapped cloths is in the shape of "eight";

4) Lay the carcass cord symmetrically again, and carry out the rest of the forming steps;

5) After molding, the tire is vulcanized, inspected and packaged.

The above is the preferred implementation form of the utility model patent, which is only used as an example, and does not limit the scope of use of the utility model patent. Variations and modifications that do not deviate from the spirit of the utility model patent all fall within the scope defined by the claims of the utility model patent.

Claims (6)

1. A kind of all-steel radial tire that strengthens bead with steel cloth composite parts, its structure comprises tire crown, tire shoulder, carcass ply (1), inner liner (2), apex (3), belt Bundle layer, steel wire cloth composite part and bead; tire bead includes steel traveler (4) and wear-resistant rubber (5); steel wire cloth composite part includes steel wire cloth (6), edge wrapping rubber (7) and film, The carcass ply (1) turns up the traveler (4), which is characterized in that: the inner side of the steel wire cloth (6) is attached between the carcass ply (1) and the inner liner (2), and the steel wire The inner end point of the wrapping cloth (6) is slightly lower than the turn-up end point of the carcass ply (1); the outer side of the steel wire wrapping cloth (6) is attached between the carcass ply (1) and the wear-resistant rubber (5) Carry out rubber wrapping at the edge of the outer turn-up of the steel wire cloth (6) and attach a layer of film, that is, the edge wrapping rubber (7) and the same side of the film (8), and the end point of the outer turn-up of the steel wire cloth (6) is higher than the tire The turn-up end point of the body cord and the steel traveler (4) are bypassed, and the section is U-shaped. 2. The all-steel radial tire according to claim 1, characterized in that: the level difference between the outer end point of the steel cloth (6) and the turn-up end point of the carcass ply is 10-15mm, and the inner end point and the carcass ply (1) The turn-up endpoint level difference is 0-5mm. 3. The all-steel radial tire according to claim 1, characterized in that: the steel cord of the steel cloth (6) has a width of 100-150mm and a thickness of 1-2mm. 4. The all-steel radial tire according to claim 1, characterized in that: the width of the wrapping glue at the outer edge of the steel cloth (6) is 20-40mm, and the thickness is 0.5-1.5mm; The width of the film (8) is 40-60mm, and the thickness is 1-3mm; wherein the distance from the outer edge of the film (8) to the steel wire cloth (6) is 10-30mm. 5. The all-steel radial tire according to claim 1, characterized in that: the steel cords of the steel cloth (6) are high-elongation steel wires with a breaking force of 1000-1500N. 6. The all-steel radial tire according to claim 1, characterized in that: the steel wire cloth is composed of parallel steel wires and rubber, and the steel wires have an angle of 30-50° with the circumferential direction of the tire.