KR0132250Y1 - Tire - Google Patents

Abstract

The present invention aims to provide a radial tire that ensures steering stability even during a sharp cornering operation of the tire by increasing the rigidity of the carcass located on the outside of the vehicle in which the load change of the tire is large compared to the inside.

The carcass structure in the related art has the same rigidity on the left and right side, so that the outer side of the vehicle is more deformed than the inside of the vehicle when it is mounted on the actual vehicle and performs sharp cornering during driving. Due to this, there is a problem in that the steering stability of the vehicle is lowered if the rigidity of the outer side of the outer side of the vehicle is not relatively large compared with the inside. Formed to be relatively large, minimizing the deformation of the tire side wheel part due to the increase of the load on the side of the vehicle due to the centrifugal force during sharp turning of the vehicle. The effect is greatly improved.

Description

Radial tires with carcass constructed asymmetrically

1 is an excerpt sectional view of the tire according to the present invention.

2 is a plan view showing an excerpt of the carcass of the present invention.

* Explanation of symbols for main parts of the drawings

1: tire 10: carcass

11: the first carcass 12: the second carcass

14: rubber layer 15: cord

The present invention relates to a radial tire for a passenger car having an asymmetrical carcass structure. In particular, the rigidity of the carcass located on the outside of the vehicle in which the load change of the tire is largely increased compared to the inside, so that the tire can be steered even during a sharp cornering operation. It is to provide a radial tire that can ensure stability.

In radial tires, carcass is a very important part that forms the skeleton of the tire and maintains the internal pressure of the tire.In order to have sufficient stress against internal pressure, the carcass is inserted into the rubber layer to form the carcass. The same carcass is to form a tire by stacking a plurality of sheets according to the characteristics of the tire.

The carcass structure of a conventional radial tire for a passenger car has both the first and the second carcass formed symmetrically at the center of the tire, and the cords installed inside the carcass are also provided with the same material so that the left and right symmetrical. Therefore, in such a conventional case, the carcass has the same rigidity on both sides. However, when the actual tire is mounted on the vehicle and undergoes sharp cornering during driving, the tire is more deformed outside than the inside of the vehicle. As a result, the steering stability of the vehicle was deteriorated if the side wheel part rigidity of the outside of the vehicle was not relatively large compared with the inside. To provide a radial tire for a passenger car formed so as to have an asymmetry.

The present invention for achieving the above object is characterized in that the left and right sides of the second carcass installed on the upper surface of the first carcass is asymmetrical, the code paper constituting the second carcass is asymmetrical left and right I put it.

This will be described with reference to the accompanying drawings.

As shown in FIG. 1 of the accompanying drawings, in a radial tire for a passenger car including a bead portion, a sidewall, and a tread portion, and a carcass 10 for forming a skeleton thereof is provided, the left and right sides of the carcass 10 are provided. Is formed to have an asymmetry, and the rigidity of one side is formed to be relatively larger than the other side, and the rigidity-enhanced portion is configured to be positioned outside of the vehicle when the tire is mounted. The carcass 10 may be formed in one layer, but in the implementation of the present invention, it is preferable to form it in two layers. When forming two layers, the first carcass 11 of the carcass 10 is conventionally formed. Same as the left and right symmetrical to form and only the second carcass 12 to form asymmetrical. In addition, although the second carcass 12 formed asymmetrically may be made asymmetrical by varying the thickness of the rubber layer 14 covering the cord 15, the cord 15 forming the second carcass 12 is formed. It is desirable to achieve asymmetry (stiffness differentiation) with the number of strands of. That is, 19 to 20 strands of cords 15 per inch are arranged on the left side (inside when the tire is attached to the vehicle) where the rigidity is relatively weak, and the right side (tire to the vehicle) is reinforced. The outer part of the case) can strengthen the rigidity of the right side by arranging 22 to 23 strands of cord 15 per inch. In making the carcass 10 asymmetrical, one end of the second carcass 12, i.e., the left end of the weak rigidity portion, is formed from the turn up edge 2 of the first carcass 11. The right end portion of which the rigidity is strengthened can be wrapped around the bead wire base portion 3 in the same manner as the conventional one so that the increase in the tire 1 can be suppressed as the number of strands of the cord 15 increases. . In addition, the width W1 of the left side where the second carcass 12 is arranged with 19 to 20 strands of cord 15 per inch, and 22 to 23 strands of cord per inch. It is preferable to comprise so that the ratio W1: W2 of the width W2 of the right side (b) in which (15) is arrange | positioned may have a ratio of 40 to 60. When the vehicle is mounted, an identification mark is placed on the sidewall of the tire so that the asymmetrical reinforcement sidewill part may be mounted in the outward foot direction of the vehicle.

The present invention configured as described above has increased the side stiffness of the side will be about 15% to 20% of the inner part of the vehicle, thereby minimizing the deformation of the tire side will be caused by the increase of the load on the outside of the vehicle due to the centrifugal force during rapid turning of the vehicle The rolling control of the vehicle is suppressed while maintaining the grip force between the ground and the ground surface, and the steering stability of the vehicle is greatly improved. The maximum speed limit of the conventional wheeled vehicle with a tire according to the present case is about 10 to 15 kpm. There is also an effect that can be improved to shorten the passing time of the same corner.

Claims (5)

A radial tire for a passenger car comprising a bead portion, a sidewall and a tread portion and provided with a carcass 10 for forming a skeleton thereof, wherein the left and right sides of the carcass 10 are formed to be asymmetrical. Radial tire consisting of. The carcass 10 is formed by combining two carcass layers, the first carcass 11 is formed symmetrically, and only the second carcass 12 is formed asymmetrically. Radial tires are constructed asymmetrically characterized in that. According to claim 2, wherein the second carcass 12 is asymmetrical radial, characterized in that the left and right arrangement of the number of strands of the cord (15) for forming it differently made asymmetrical tire. 4. The right side (b) of claim 3, wherein the left side (a) of the asymmetrical second carcass (12) is arranged with 19 to 20 strands of cord (15) per inch, and the rigid side is reinforced. Radial tires are asymmetrical configuration, characterized in that by arranging 22 to 23 strands of cord (15) per inch (inch). The width W1 of the left side (a) of the 2nd carcass 12, and the ratio of (W2) of the right side (b) were comprised by 40 to 60, The said Claim 3 or 4 characterized by the above-mentioned. The carcass of the radial tire which is comprised asymmetrically.