CN204311274U - Steel cord for engineering tire - Google Patents

Abstract

The utility model discloses a steel cord for engineering tires, which is formed by braiding and twisting steel wires, and includes core steel wire strands, middle steel wire strands and outer wrapped steel wires, and the middle steel wire strands are distributed on the core steel wire strands. Around, the outer wrapped steel wire is wound outside the middle steel wire strand, the twist direction of the core steel wire strand is S/S twist, the twist direction of the middle steel wire strand is Z/Z twist, and the twist direction of the outer wrapped steel wire The direction is S twist. The steel cord for engineering tires has strong bearing capacity, good glue penetration performance, good puncture resistance, good corrosion resistance performance, high safety performance, and has a small weight ratio in the tire.

Description

Steel cord for engineering tire

technical field

The utility model relates to an engineering tire steel cord.

Background technique

In recent years, with the rapid development of my country's infrastructure construction, the demand for construction machinery radial tires used in harsh environments such as mines and construction sites has continued to increase. The vehicles in the mining area are seriously overloaded and the road conditions are bad, so the performance requirements of the steel cord for engineering tires are very strict. Especially in terms of bearing capacity, puncture resistance, fatigue resistance and corrosion resistance.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide an engineering tire steel cord with strong bearing capacity, good glue penetration performance, good puncture resistance, good corrosion resistance performance, high safety performance, and a small proportion of tire weight.

The utility model is achieved through the following technical solutions:

Steel cords for engineering tires are braided and twisted steel wires, including core steel wire strands, middle steel wire strands and outer wrapping steel wires. The middle steel wire strands are distributed around the core steel wire strands, and the outer wrapping steel wires are wound Except for the middle steel wire strands, the twist direction of the core steel wire strands is S/S twist, the twist direction of the middle steel wire strands is Z/Z twist, and the twist direction of the outer wrapped steel wires is S twist.

The core steel wire strands are braided and twisted from one steel wire in the inner layer, six steel wires in the middle layer and twenty steel wires in the outer layer.

The steel wire strands in the middle part are six steel wire strands distributed around the core steel wire strands, and each steel wire strand is composed of one steel wire in the inner layer, six steel wires in the middle layer and twenty steel wires in the outer layer. made.

The carbon content of the core steel wire strands, middle steel wire strands and outer wrapping steel wires is not less than 0.7%.

The steel cord for engineering tires of the utility model is formed by braiding and twisting of core steel wire strands, six intermediate steel wire strands wound around the core steel wire strands and an additional winding steel wire, and consists of 134 strands in total. Composed of steel wire, high strength, strong bearing capacity. The steel wire strands are in surface contact, and the space for movement between the single wires is large, the flexibility is strong, and the fatigue resistance is good. The steel wire strands in the core, the steel wire strands in the middle and the outer wrapping steel wires are alternately twisted, and the rubber can seep easily between the steel wire strands, and the rubber can fully penetrate into the steel cord, which has good corrosion resistance and prolongs the service life of the tire.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model improves the mechanical properties of the thread and reduces the amount of thread, thereby reducing the weight of the tire and reducing the production cost;

2. The utility model has high strength and strong bearing capacity; the steel wire strands are in surface contact, and the movable space between the single wires is large and flexible, with good fatigue resistance and safety performance; the core steel wire strands are in contact with the middle The inner steel wire strands and the outer wrapped steel wires are alternately twisted, and the rubber between the steel wire strands is easy to penetrate, and the rubber can fully penetrate into the steel cord, which has good puncture resistance and corrosion resistance, and prolongs the service life of the tire.

Description of drawings

Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the utility model.

Serial numbers in the figure: 1, core steel wire strands, 2, middle steel wire strands, 3, outer wrapped steel wires.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described in further detail.

As shown in Figure 1, a steel cord for engineering tires is formed by braiding and twisting steel wires, the carbon content of which is not less than 0.7%, and its cross-section is circular, which specifically includes a core steel wire strand 1, a middle steel wire strand 2 and outer wrapped steel wire 3; the core steel wire strand 1 is formed by braiding and twisting a steel wire with a diameter of 0.25mm in the inner layer, six steel wires with a diameter of 0.225mm in the middle layer and twenty steel wires with a diameter of 0.225mm in the outer layer. The twist direction of the steel wire strand 1 is S/S twist, the lay distance of the middle layer steel wire braiding twist is 8.0mm, and the lay length of the outer layer steel wire braiding twist is 16.0mm; The steel wire strands around the core steel wire strand 1, each steel wire strand is braided and twisted by one steel wire with a diameter of 0.25mm in the inner layer, six steel wires with a diameter of 0.225mm in the middle layer and twenty steel wires with a diameter of 0.225mm in the outer layer. The twist direction of the steel wire strand 2 at the top is Z/Z twist, the lay length of the steel wire in the middle layer is 8.0 mm, and the lay length of the outer steel wire is 16.0 mm; the diameter of the outer steel wire 3 is 0.225 mm , the twist length is 5.0mm, and the twist direction is S twist.

Embodiment is only for the convenience of understanding the technical scheme of the present utility model, does not constitute the restriction to the scope of protection of the present utility model, any simple modification that does not break away from the content of the technical solution of the present utility model or according to the technical essence of the present utility model is done to the above scheme , equivalent changes and modifications all still belong to the protection scope of the present utility model.

Claims (3)

1. Steel cord for engineering tires is made of twisted steel wires, including core steel wire strands ⑴, middle steel wire strands ⑵ and outer wrapping steel wires ⑶, and the middle steel wire strands are distributed around the core steel wire strands ⑴ , the outer wrapped steel wire (3) is wound outside the steel wire strand (2) in the middle part, and it is characterized in that: the twist direction of the steel wire strand (1) in the core part is S/S twist, and the twist direction of the steel wire strand (2) in the middle part is Z/Z Twist, the twist direction of the outer wrapped steel wire ⑶ is S twist. 2. The steel cord for engineering tires according to claim 1, characterized in that: said core steel wire strand (1) is formed by braiding and twisting one steel wire in the inner layer, six steel wires in the middle layer and twenty steel wires in the outer layer. become. 3. The steel cord for engineering tires according to claim 1 or 2, characterized in that: the steel wire strands in the middle part are six steel wire strands distributed around the core steel wire strands (1), and each strand of steel wire The strands are braided and twisted by one steel wire in the inner layer, six steel wires in the middle layer and twenty steel wires in the outer layer.