KR101638954B1 - Pneumatic Tire with Reinforced Sidewall - Google Patents

Pneumatic Tire with Reinforced Sidewall Download PDF

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Publication number
KR101638954B1
KR101638954B1 KR1020150049552A KR20150049552A KR101638954B1 KR 101638954 B1 KR101638954 B1 KR 101638954B1 KR 1020150049552 A KR1020150049552 A KR 1020150049552A KR 20150049552 A KR20150049552 A KR 20150049552A KR 101638954 B1 KR101638954 B1 KR 101638954B1
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KR
South Korea
Prior art keywords
side wall
reinforcing
layer
rubber layer
rim flange
Prior art date
Application number
KR1020150049552A
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Korean (ko)
Inventor
최가영
Original Assignee
금호타이어 주식회사
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Application filed by 금호타이어 주식회사 filed Critical 금호타이어 주식회사
Priority to KR1020150049552A priority Critical patent/KR101638954B1/en
Application granted granted Critical
Publication of KR101638954B1 publication Critical patent/KR101638954B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C15/00—Tyre beads, e.g. ply turn-up or overlap
    • B60C15/0009—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion
    • B60C15/0054—Tyre beads, e.g. ply turn-up or overlap features of the carcass terminal portion with ply turn-up portion parallel and adjacent to carcass main portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/02—Carcasses
    • B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

The present invention relates to a side wall reinforced pneumatic tire, which comprises a side wall assembly semi-finished product layer in a single semi-finished product form together with a side wall rubber layer so as to cover the outside of the carcass ply at the bead portion and the side wall portion, The rigidity of the sidewall portion is reinforced by the sidewall reinforcement extending portion which is superimposed on the lower side of the sidewall rubber layer from the body portion and extends to have a thin thickness so as to cover the outside of the turnup portion of the carcass ply, The durability and ride comfort of the load can be improved, and the supporting rigidity can be increased to improve the handling performance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pneumatic tire,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a side wall reinforcing pneumatic tire, and more particularly, to a side wall reinforcing pneumatic tire which can reinforce the rigidity of a side wall through an extension of a rim flange forming a bead.

As is well known, the pneumatic tire supports the entire load of the automobile by the air filled with the preset pressure therein, absorbs the impact received from the road surface by the buffering action, and by friction between the road surface and the outer peripheral surface It performs the basic driving, stopping and redirecting functions of the car.

Therefore, the pneumatic tire has an inner liner manufactured to enhance the permeability to the air injected into the inner tire, and an inner liner manufactured to have the fatigue resistance against the bending and stretching load repeated during operation corresponding to the skeleton of the tire A tread forming a ground surface of the tire; a side wall for protecting the carcass ply; a bead portion for mounting a tire on a rim; (Beam Portion), a specimen gum (Gum Chafer) connected to an end of the inner liner and reinforcing and reinforcing the bead portion, and an Apex positioned above the bead portion.

On the other hand, the sidewall portion corresponds to the side surface of the tire and is required to have excellent elasticity so as to absorb shock and vibration from the ground, but it is the weakest part due to frequent bending motion.

Accordingly, various methods for reinforcing the side wall portion have been studied, and methods of adding semifinished products such as a rubber shear, a nylon shear, or an insert rubber strip have been mainly used.

However, in the above-described side wall reinforcement methods, the added semi-finished products have a low adhesive force with the carcass ply, resulting in a separation phenomenon in which the layers are separated by repetitive bending motion, or the weight of the tire is increased to reduce fuel consumption .

Korean Patent Laid-Open Publication No. 2011-0037290 (Published date April 13, 2011) Korean Registered Patent Bulletin 2012-0460645 (Published on May 22, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems by providing a sidewall assembly capable of improving durability, ride comfort and handling performance of a tire by reinforcing the rigidity of the sidewall portion as well as the bead portion, To provide a reinforced pneumatic tire.

In order to achieve the above object, a side wall reinforced pneumatic tire according to the present invention comprises a pneumatic tire including a side wall assembly semi-finished product layer covering an outer side of a carcass ply at a bead portion and a side wall portion, Wherein the side wall assembly semi-finished product layer includes a rim flange rubber layer extending from a lower side of the bead portion to a portion before a turn-up end portion of the carcass ply forming the sidewall portion, And a cord reinforcing layer on which reinforcing cords are arranged on the inner side in contact with the ply.

Here, the rim flange rubber layer may include a rim flange body portion forming a seating protrusion so as to be fitted to the rim outside the carcass fly-up portion of the bead portion; And a sidewall reinforcing extension portion extending from the rim flange body portion to the lower side of the lower end portion of the sidewall rubber layer and extending to cover the turn-up end portion of the carcass ply.

The rim flange rubber layer may further include a bead reinforcing extension portion extending from the rim flange body portion to be in contact with the inner liner end portion inside the bead portion.

It is preferable that the distance L1 from the extending end of the side wall reinforcing extension to the turn-up end of the carcass ply is within a range of 10 mm to 20 mm.

It is preferable that the thickness (T1) of the cord reinforcing layer of the rim flange rubber layer is within a range of 0.2 mm to 0.3 mm.

The reinforcing cord constituting the cord reinforcing layer may be made of the same fabric material as the carcass ply.

It is preferable that the thickness T2 of the upper rubber layer covering the cord reinforcing layer of the side wall reinforcing extension portion is within a range of 0.4 mm to 0.5 mm.

According to the sidewall reinforcement pneumatic tire of the present invention, the semi-finished product of the side wall assembly is formed as a single semi-finished product together with the sidewall rubber layer so as to cover the outside of the carcass ply at the bead portion and the sidewall portion, By reinforcing the rigidity of the sidewall portion by the sidewall reinforcement extending portion which is superimposed on the lower side of the sidewall rubber layer from the flange body portion and which is formed so as to cover the outer side of the turnup portion of the carcass ply, It is possible to improve the durability and ride comfort with respect to the working load and to enhance the handling rigidity to improve the handling performance.

1 is a front sectional view showing a side wall reinforcing pneumatic tire according to an embodiment of the present invention.
Fig. 2 is a partially enlarged sectional front view of the side wall reinforcing pneumatic tire of Fig. 1, which is an enlarged view of part II.
3 is a partial side sectional view showing a semi-finished product of the side wall assembly constituting the semi-finished product layer of FIG.
Fig. 4 is a cross-sectional view of the side wall assembly of Fig. 3 cut along the line IV-IV.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 1 is a front sectional view showing a side wall reinforcing pneumatic tire according to an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional front view of a side wall reinforcing pneumatic tire of FIG. 1 .

1 and 2, the side wall reinforcing pneumatic tire 1 of the present embodiment is basically composed of a shoulder portion 20, a side wall portion 30 and a bead portion 40 are sequentially formed.

A carcass ply 60 serving as a skeleton of the tire is formed on the inner side of the tread portion 10, the shoulder portion 20, the side wall portion 30 and the bead portion 40 with an inner Is laminated on the upper side of the liner (50) and extends along the width direction.

In the tread portion 10, the belt layer 11, the under tread layer 13, and the tread layer 15 are sequentially laminated on the carcass ply 60.

The belt layer 11 relieves an external impact with a special code paper located between the carcass ply 60 and the under tread layer 13 and causes a crack or an external force generated in the tread layer 15 to be transferred to the carcass ply 60. [ To prevent direct delivery to the.

The under-tread layer 13 is used to increase the adhesion between the belt layer 11 and the tread layer 15, and is made of a special rubber material excellent in abrasion resistance and cutting resistance.

The thickness of the shoulder portion 20 gradually decreases and the cap ply layer 21 is laminated so as to cover the end portion of the belt layer 11 as a portion connecting the tread portion 10 and the side wall portion 30 .

The cap ply layer (21) minimizes the movement of the belt layer (11) when traveling with a special code paper adhered on the belt layer (11), thereby preventing the deviation phenomenon at high speed running.

The side wall portion 30 is a portion that serves to support a load of the vehicle and to mitigate an external impact caused by a bending motion and is covered and secured to the outer surface of the carcass ply 60 through the side wall rubber layer 31 do.

here. The sidewall rubber layer 131 is formed and vulcanized by lamination molding the side wall assembly semi-finished product layer 100 which is extruded in the form of a single semi-finished product together with a rim flange rubber layer 110 to be described later, A rubber layer covering the outside of the ply 60 is formed.

 In the bead portion 40, the carcass ply 60 turns on both ends to wrap and secure the bead wire 41 and apax 42, and the turnup portion 62 of the carcass ply 60 A rim flange rubber layer 110 for covering and reinforcing is formed.

Here, the bead wire 41 serves to couple and fix the tire to the rim with the wire bundle of the steel wire coated with rubber, and the apax 42 prevents dispersion of the bead wire 41, Thereby preventing the generation of air in the bead portion (40).

When the rim flange rubber layer 110 covers the rim (not shown) and the turnup part 62 of the carcass ply 60 and the carcass ply 60 is mounted on the finished pneumatic tire rim, So as to prevent the tire from coming into direct contact with the rim, and to reinforce the support rigidity of the tire through the bead portion (40).

Here, the rim flange rubber layer 110 is formed by molding and vulcanizing the side wall assembly semi-finished product layer 100, which is extruded in the form of a single semi-finished product together with the side wall rubber layer 131 as described above, As shown in FIG.

In particular, the rim flange rubber layer 110 of the present embodiment extends from the lower side of the bead portion 40 to a position before the turn-up end portion of the carcass ply 60 constituting the side wall portion 30, So that it is possible to reinforce the bending and support rigidity.

FIG. 3 is a partial side sectional view showing a semi-finished product of the side wall assembly of the side wall assembly of FIG. 2, and FIG. 4 is a sectional view taken along the line IV-IV of the side wall assembly of FIG.

3 and 4, the rim flange rubber layer 110 constituting the side wall assembly semi-finished product layer 100 in a single semi-finished product state together with the side rubber layer 131 is formed by a rim flange body portion 111, An extension portion 112 and a side wall reinforcing extension portion 113.

The rim flange body portion 111 is a portion of the bead portion 40 where the bead portion 40 is fitted to the rim and is seated on the outside of the turnup portion 62 of the carcass ply 60 to form the seat projection portion 101.

The bead portion reinforcing extension portion 112 extends from the rim flange body portion 111 to the inner liner 50 at the inner side of the bead portion 40 so as to face the end portion of the inner liner 50, Up portion 62 of the caspia 60 is prevented from coming into direct contact with the rim and the reinforcement of the support rigidity of the tire through the bead portion 40 can be reinforced.

Particularly, the side wall reinforcing extension portion 113 extends from the rim flange body portion 111 to the lower side of the lower end portion of the sidewall rubber layer 131 and extends to cover the turn-up end portion of the carcass ply 60, So as to reinforce the support rigidity of the side wall portion 30 with respect to the turning load.

At this time, it is preferable that the side wall reinforcing extension portion 113 is extended so that the length L1 from the extending end of the side wall reinforcing extension portion 113 to the turn-up end portion of the carcass ply 60 is overlapped within a range of 10 mm to 20 mm.

Here, when the distance L1 from the extending end of the side wall reinforcing extension portion 113 to the turn-up end of the carcass ply 60 is less than 10 mm, the extension end of the side wall reinforcing extension portion 113 is located on the carcass ply 60) are arranged so close to each other as to form a larger stepped portion having a thickness difference continuously so as to form a larger stepped portion, which is covered with a separator So that a phenomenon of occurrence of a phenomenon occurs.

 When the distance L1 from the extending end of the side wall reinforcing extension portion 113 to the turn-up end portion of the carcass ply 60 exceeds 20 mm, the distance L1 between the extending end of the side wall reinforcing extension portion 113 and the turn- The reinforcing effect on the side wall portion 30 is lowered because the distance is shortened.

The reinforcing cords 116 are continuously arranged on the inner bottom surface of the rim flange body portion 111, the bead reinforcing extension portion 112 and the side wall reinforcing extension portion 113 constituting the rim flange rubber layer 110 A code reinforcing layer 115 may be further formed.

By forming the cord reinforcing layer 115 in which the reinforcing cords 116 are arranged inside the rim flange rubber layer 110 as described above, it is possible to more effectively reinforce the rigidity of the side wall portion 30 as well as the bead portion 40 .

The reinforcing cords 116 formed in the cord reinforcing layer 115 can be formed in the same fashion as the carcass ply 60. In this case, the rim flange rubber layer 100 is superimposed and the bead 40 and / It is possible to obtain a reinforcing effect such as to form a double ply structure in a section of the side wall portion 30. [

The thickness T1 of the cord reinforcing layer 115 is within a range of 0.2 mm to 0.3 mm and the thickness T2 of the upper rubber layer 117 covering the cord reinforcing layer 115 of the sidewall reinforcing extension portion 113 is, Is preferably formed to be thinly formed within a range of 0.4 mm to 0.5 mm.

First, when the thickness T1 of the cord reinforcing layer 115 is less than 0.2 mm, the diameter of the fabric cord constituting the reinforcing cord 116 is small and it is difficult to expect the effect of increasing the durability thereof. When the thickness T1 exceeds 0.3 mm, Since the thickness of the upper rubber layer 117 covering the reinforcing cord 116 must be increased in proportion to the increase in the diameter of the fabric cord used as the reinforcing cord 116, the fuel consumption is lowered due to the increase in the weight of the tire do.

If the thickness of the upper rubber layer 117 of the side wall reinforcing extension portion 113 is less than 0.4 mm, the reinforcing cord 116 can not be completely wrapped around the reinforcing cord 116, (116) is wrapped too thick, and the fuel consumption is reduced due to the increase in weight as described above.

As described above, the side wall reinforcing pneumatic tire 1 of the present embodiment has a single semi-finished product shape together with the side wall rubber layer 131 so as to cover the outside of the carcass ply 60 in the bead portion 40 and the side wall portion 30. [ The side wall assembly semi-finished product layer 100 of the carcass ply 60 is superimposed on the lower side of the side wall rubber layer 131 from the rim flange body 111 of the carcass ply 60 and the outer side of the turn- The reinforcement of the side wall portion 30 is reinforced through the side wall reinforcing extension portion 113 extended to have a thin thickness so as to cover the side wall portion 30 so as to improve the durability and riding comfort for the repeated working loads generated in the side wall portion 30. [ So that the supporting rigidity can be increased and the handling performance can be improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention. And it goes without saying that they belong to the scope of the present invention.

1: pneumatic tire 10: tread portion
20: shoulder portion 30: side wall portion
40: bead portion 50: inner liner
60: Carcass fly 100: Side wall assembly Semi finished product layer
110: rim flange rubber layer 111: rim flange body
112: bead reinforcement extension part 113: side wall reinforcement extension part
115: cord reinforcing layer 116: reinforcing cord
117: upper rubber layer 131: side wall rubber layer

Claims (7)

A pneumatic tire including a side wall assembly semi-finished product layer covering an outer side of a carcass ply at a bead portion and a side wall portion and constituting an outer wall surface of the tire,

Wherein the side wall assembly semi-finished product layer comprises:
And a rim flange rubber layer extending from a lower side of the bead portion to a portion before a turn-up end portion of the carcass ply constituting the side wall portion,

The rim flange rubber layer
A rim flange body portion forming a seating protrusion so as to be fitted to the rim outside the carcass fly-up portion of the bead portion; And
And a sidewall reinforcing extension portion extending from the rim flange body portion to the lower side of the lower end portion of the sidewall rubber layer and extending to cover the turn-up end portion of the carcass ply,

The distance L1 from the extending end of the side wall reinforcing extension to the turn-up end of the carcass ply is within a range of 10 mm to 20 mm,

Wherein the rim flange rubber layer has a cord reinforcing layer on which reinforcing cords are arranged in contact with the carcass ply.
delete The method of claim 1,
The rim flange rubber layer
And a bead reinforcing extension portion extending from the rim flange body portion so as to abut the inner liner end portion inside the bead portion.
delete The method of claim 1,
Wherein a thickness T2 of the cord reinforcing layer of the rim flange rubber layer is within a range of 0.2 mm to 0.3 mm.
The method of claim 5,
Wherein the reinforcing cord constituting the cord reinforcing layer is made of a fabric material.
The method of claim 5,
Wherein a thickness (T1) of an upper rubber layer covering the cord reinforcing layer of the side wall reinforcing extension portion is within a range of 0.4 mm to 0.5 mm.
KR1020150049552A 2015-04-08 2015-04-08 Pneumatic Tire with Reinforced Sidewall KR101638954B1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002127718A (en) * 2000-10-30 2002-05-08 Sumitomo Rubber Ind Ltd Pneumatic tire and its manufacturing method
KR20110037290A (en) 2009-10-06 2011-04-13 금호타이어 주식회사 A pneumatic tire having an extended rimflange
KR200460645Y1 (en) * 2010-05-04 2012-06-08 금호타이어 주식회사 Semi-finished sidewalls and pneumatic tires comprising the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002127718A (en) * 2000-10-30 2002-05-08 Sumitomo Rubber Ind Ltd Pneumatic tire and its manufacturing method
KR20110037290A (en) 2009-10-06 2011-04-13 금호타이어 주식회사 A pneumatic tire having an extended rimflange
KR200460645Y1 (en) * 2010-05-04 2012-06-08 금호타이어 주식회사 Semi-finished sidewalls and pneumatic tires comprising the same

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