JPH01314611A - Pneumatic tire - Google Patents
Pneumatic tireInfo
- Publication number
- JPH01314611A JPH01314611A JP63145417A JP14541788A JPH01314611A JP H01314611 A JPH01314611 A JP H01314611A JP 63145417 A JP63145417 A JP 63145417A JP 14541788 A JP14541788 A JP 14541788A JP H01314611 A JPH01314611 A JP H01314611A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- rim
- point
- check line
- peripheral length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
Landscapes
- Tires In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、乗心地性を損なうことなく限界性能を向上さ
せた空気入りタイヤに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a pneumatic tire with improved limit performance without impairing ride comfort.
従来、空気入りタイヤの限界性能を向上させるには、タ
イヤ横剛性を増加させる必要があることが一般に知られ
ている。このために、タイヤサイド部のゲージ厚を増加
させたりタイヤサイド部に補強材を入れたりする等の手
段がとられている。しかし、この場合、限界性能が向上
する反面、縦ハネ定数の増加により乗心地性が低下して
しまうという欠点がある。ここで、限界性能とは、操縦
安定性の内で特に旋回性能をいう。Conventionally, it has been generally known that in order to improve the marginal performance of a pneumatic tire, it is necessary to increase the tire lateral stiffness. To this end, measures have been taken such as increasing the gauge thickness of the tire side portions and inserting reinforcing materials into the tire side portions. However, in this case, although the marginal performance is improved, there is a drawback that the riding comfort is reduced due to an increase in the longitudinal spring constant. Here, the limit performance refers particularly to turning performance within handling stability.
本発明は、タイヤサイド部のプロファイル（サイド部の
外面形状）を工夫することにより、乗心地性を殆ど低下
させることなく限界性能を向上させた空気入りタイヤを
提供することを目的とする。An object of the present invention is to provide a pneumatic tire that improves marginal performance without substantially reducing ride comfort by devising the profile of the tire side portion (the outer surface shape of the side portion).
このため、本発明は、正規内圧を充填し、正規リムに組
み込んだタイヤの子午線方向断面において、ショルダー
ポイントＰからリムチェックラインＲまでのペリフェリ
ー長ざをρとし、ショルダーポイントＰからリムチェッ
クラインＲの方向にペリフェリー長さＴ＝０．２５Ｘ＃
だけ離れた点をＱとし、このＱ点からリムチェックライ
ンＲの方向にペリフェリー長さＳまでに亘って凹部をタ
イヤ周方向に環状に形成し、この凹部の深さをＧとした
場合に、下記式を満足することを特徴とする空気入りタ
イヤを要旨とする。For this reason, in the present invention, in the meridian cross section of a tire filled with a regular internal pressure and assembled on a regular rim, the peripheral length from the shoulder point P to the rim check line R is ρ, and from the shoulder point P to the rim check line Periphery length T = 0.25X# in the direction of R
A point separated by the distance is Q, and if a recess is formed in a circular shape in the tire circumferential direction from this Q point in the direction of the rim check line R up to the peripheral length S, and the depth of this recess is G. The gist of the present invention is a pneumatic tire that satisfies the following formula.
（Ｓ／ｌ）＝０．１１〜０．２２
Ｇ≧１ｍｎ＋
以下、図を参照して本発明の構成につき詳しく説明する
。(S/l)=0.11-0.22 G≧1mn+ Hereinafter, the structure of the present invention will be explained in detail with reference to the drawings.
第１図は、本発明の空気入りタイヤの一例の子午線方向
半断面説明図である。第１図において、タイヤ１は、正
規内圧が充填され、正規リムに組み込まれた状態にある
。“正規内圧が充填され”とは、内部が正規内圧となる
ように空気が充填されることをいう。FIG. 1 is an explanatory half-sectional view in the meridian direction of an example of the pneumatic tire of the present invention. In FIG. 1, a tire 1 is filled with a regular internal pressure and is installed on a regular rim. "Filled with normal internal pressure" means that air is filled so that the inside has the normal internal pressure.
タイヤ１では、左右一対のヒート部５，５間に１層のカ
ーカス層４が装架されており、トレソト部２においては
カーカス層４の上に２層のベルト層６がタイヤ周方向に
環状に配置されている。７は、サイドウオール部３の表
面に形成された文字である。８はリムを表わす。In the tire 1, one carcass layer 4 is installed between a pair of left and right heat parts 5, 5, and in the toresoto part 2, two belt layers 6 are arranged on the carcass layer 4 in an annular shape in the tire circumferential direction. It is located in 7 is a character formed on the surface of the sidewall portion 3. 8 represents the rim.
本発明では、タイヤ１において、ショルダーポイントＰ
からリムチェックラインＲまでのペリフェリー長さをｐ
とする。ショルダーポイントＰとは、トレン、ド部２の
表面を形付ける円弧の延長線とショルダ一部の表面を形
付ける円弧の延長線との交差点をいう。チエツクライン
Ｒとは、リム８との接触から解放されるビード部外側箇
所におけるタイヤ周方向環状ラインをいう。ペリフェリ
ー長さとは、タイヤ外面上の長さをいう。In the present invention, in the tire 1, the shoulder point P
The periphery length from to the rim check line R is p
shall be. The shoulder point P refers to the intersection of the extension line of the arc defining the surface of the train and do portion 2 and the extension line of the arc defining the surface of part of the shoulder. The check line R refers to an annular line in the circumferential direction of the tire at a location outside the bead portion that is released from contact with the rim 8. Periphery length refers to the length on the outer surface of the tire.
また、ショルダーポイントＰからリムチエツクラインＲ
の方向にペリフェリー長さＴ＝０．２５ＸＮだけ離れた
点をＱとする。この点Ｑは、ショルダ一部の表面を形付
ける円弧の延長線とサイド部の表面を形付ける円弧の延
長線との交差点に相当する。Also, from shoulder point P to rim check line R
Let Q be a point separated by the periphery length T=0.25XN in the direction of . This point Q corresponds to the intersection of the extended line of the circular arc that forms the surface of the shoulder part and the extended line of the circular arc that forms the surface of the side part.
このＱ点からリムチェックラインＲの方向にペリフェリ
ー長さＳまでに亘って凹部Ａをタイヤ周方向に環状に形
成する。このように凹部Ａを形成するのは、この箇所の
ゲージ厚を減少させて縦バネ定数の低減をはかり、乗心
地性の低下を防止するためである。A concave portion A is formed in an annular shape in the tire circumferential direction from this point Q to the periphery length S in the direction of the rim check line R. The purpose of forming the recessed portion A in this way is to reduce the gauge thickness at this location, reduce the longitudinal spring constant, and prevent the ride comfort from deteriorating.
凹部Ａの深さＧは、凹部Ａを設けないと仮定した場合に
おける相当箇所のタイヤ表面（この表面には文字７等の
パターンは形成されていないとする）からの凹部Ａの底
部までの距離である。凹部Ａの底部に凹凸があるときは
、最も深い箇所までである。The depth G of the recess A is the distance from the corresponding tire surface (assuming that no pattern such as the letter 7 is formed on this surface) to the bottom of the recess A, assuming that the recess A is not provided. It is. When the bottom of the recess A is uneven, it extends to the deepest point.
このように凹部Ａを形成した場命において、本発明では
、下記式を満足する。In the case where the concave portion A is formed in this manner, the following formula is satisfied in the present invention.
（Ｓ／Ｎ） ＝０．１１〜０．２２
Ｇ≧ １ｍｍ
（Ｓ／ｌ ＜０．１１では、この箇所の縦バネ定数を十
分に低減できないので乗心地性の低下を防止し得ない。(S/N) = 0.11 to 0.22 G≧1 mm (If S/l <0.11, the longitudinal spring constant at this location cannot be sufficiently reduced, and therefore it is not possible to prevent a decrease in riding comfort.
一方、（Ｓ／ｎ） ＞０．２２では、サイド部のゲージ
厚が減少してタイヤ横剛性が低減し、限界性能が向上し
ないからである。また、Ｑ＜１ｍｍでは、凹部Ａの深さ
が殆どなくなるので、この箇所のゲージ厚の減少をはか
ることができなくなるからである。On the other hand, when (S/n) >0.22, the gauge thickness of the side portion decreases, the tire lateral rigidity decreases, and the limit performance does not improve. Furthermore, if Q<1 mm, the depth of the recessed portion A becomes almost zero, making it impossible to reduce the gauge thickness at this location.
以下に実施例を示す。Examples are shown below.
実施例
下記の本発明タイヤおよび従来タイヤについて縦バネ定
数（Ｓｖ）、横バネ定数（Ｓｔ ）、乗心地性、および
限界性能をそれぞれ評価した。この結果を表１に従、来
タイヤを１００として指数で示す。EXAMPLE The longitudinal spring constant (Sv), lateral spring constant (St), riding comfort, and limit performance of the tire of the present invention and the conventional tire described below were evaluated. The results are shown as an index according to Table 1, with the previous tire set as 100.
■ 本発明タイヤ。■ Tire of the present invention.
タイヤサイズ２２５１５０ Ｒ１６゜第１図に示すプロ
ファイル形状を有する。（、Ｓ／ｊり ＝０゜１３、Ｇ
＝１．５ ｍｍａ
■ 従来タイヤ。The tire size is 225150 R16° and has the profile shape shown in Fig. 1. (, S/jri = 0゜13, G
=1.5 mm ■ Conventional tire.
タイヤサイズ２２５１５０ Ｒ１６゜凹部Ａを形成して
いないことを除いて上記本発明タイヤと同し。Tire size: 225150 R16° Same as the tire of the present invention except that concave portion A is not formed.
７′ハネ （ＳＶ ）の評イ １：縦ハネ定数とは
、サイド部のラジアル方向ハネ定数である。これば、タ
イヤをリムに装着し、タイヤトレッド面を固定してリム
を上下に移動させたときのサイド部の力と変位量を測定
し、バネ定数を算出することによって評価した。7' Review of spring (SV) 1: The vertical spring constant is the spring constant of the side part in the radial direction. In this case, the tire was mounted on the rim, the tire tread surface was fixed, and the rim was moved up and down, and the force and displacement of the side portion were measured, and the spring constant was calculated.
ハネ （ＳＬ ）のＷ 法：
横バネ定数とは、サイド部横方向のハネ定数である。こ
れは、タイヤをリムに装着し、タイヤトレッド面を固定
してリムを前後に移動させたときのサイド部の力と変位
量を測定し、ハネ定数を算出することによって評価した
。W method of spring (SL): The lateral spring constant is the spring constant in the lateral direction of the side portion. This was evaluated by mounting the tire on the rim, fixing the tire tread surface, and moving the rim back and forth, measuring the force and displacement of the side portion, and calculating the spring constant.
氾４ の云・ 法ニ 一般路における実車官能評価による。Flood 4 noun/honi Based on actual vehicle sensory evaluation on public roads.
叱の１・ 法： ザーキソト場における実車官能評価による。Scolding method 1: Based on actual vehicle sensory evaluation at the Zakisoto field.
表１から明らかなように、本発明タイヤは従来タイヤに
比し乗心地性を殆ど低下させることなしに限界性能を向
上させることができる。As is clear from Table 1, the tire of the present invention can improve the limit performance without substantially reducing ride comfort compared to the conventional tire.
以上説明したように本発明によれば、タイヤサイド部の
上端領域のゲージ厚を部分的に減少させたので、乗心地
性を殆ど低下させることなく限界性能を向上させること
が可能となる。As explained above, according to the present invention, the gauge thickness in the upper end region of the tire side portion is partially reduced, so that it is possible to improve the limit performance without substantially reducing ride comfort.
第１図は本発明の空気入りタイヤの一例の子午線方向半
断面説明図である。
１・・・タイヤ、２・・・トレンド部、３・・・サイド
部、４・・・カーカス層、５・・・ヒート部、６・・・
ヘルド層、７・・・文字、８・・・リム。
代理人 弁理士 小 川 信 −FIG. 1 is an explanatory half-sectional view in the meridian direction of an example of the pneumatic tire of the present invention. DESCRIPTION OF SYMBOLS 1... Tire, 2... Trend part, 3... Side part, 4... Carcass layer, 5... Heat part, 6...
Heald layer, 7... letters, 8... rim. Agent Patent Attorney Nobuo Ogawa −
Claims (1)
線方向断面において、ショルダーポイントＰからリムチ
ェックラインＲまでのペリフェリー長さをｌとし、ショ
ルダーポイントＰからリムチェックラインＲの方向にペ
リフェリー長さＴ−０．２５×ｌだけ離れた点をＱとし
、このＱ点からリムチェックラインＲの方向にペリフェ
リー長さＳまでに亘って凹部をタイヤ周方向に環状に形
成し、この凹部の深さをＧとした場合に、下記式を満足
することを特徴とする空気入りタイヤ。 （Ｓ／ｌ）＝０．１１〜０．２２ Ｇ≧１ｍｍ[Claims] In the meridian cross-section of a tire filled with a regular internal pressure and assembled on a regular rim, the peripheral length from the shoulder point P to the rim check line R is l, and from the shoulder point P to the rim check line R. The point Q is the distance of the periphery length T - 0.25 x l in the direction of the tire. 1. A pneumatic tire which satisfies the following formula, where the depth of the recess is G. (S/l)=0.11~0.22 G≧1mm
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63145417A JP2649173B2 (en) | 1988-06-13 | 1988-06-13 | Pneumatic tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63145417A JP2649173B2 (en) | 1988-06-13 | 1988-06-13 | Pneumatic tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01314611A true JPH01314611A (en) | 1989-12-19 |
| JP2649173B2 JP2649173B2 (en) | 1997-09-03 |
Family
ID=15384769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63145417A Expired - Fee Related JP2649173B2 (en) | 1988-06-13 | 1988-06-13 | Pneumatic tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2649173B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394918A (en) * | 1992-07-08 | 1995-03-07 | The Yokohama Rubber Co., Ltd. | Pneumatic radial tire with reduced road noise |
| WO1997009182A1 (en) * | 1995-09-08 | 1997-03-13 | Bridgestone Corporation | Pneumatic radial tire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62143706A (en) * | 1985-12-17 | 1987-06-27 | Yokohama Rubber Co Ltd:The | Pneumatic radial racing tire |
-
1988
- 1988-06-13 JP JP63145417A patent/JP2649173B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62143706A (en) * | 1985-12-17 | 1987-06-27 | Yokohama Rubber Co Ltd:The | Pneumatic radial racing tire |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5394918A (en) * | 1992-07-08 | 1995-03-07 | The Yokohama Rubber Co., Ltd. | Pneumatic radial tire with reduced road noise |
| WO1997009182A1 (en) * | 1995-09-08 | 1997-03-13 | Bridgestone Corporation | Pneumatic radial tire |
| US5849118A (en) * | 1995-09-08 | 1998-12-15 | Bridgestone Corporation | Pneumatic radial tires with specified profile |
| US6058995A (en) * | 1995-09-08 | 2000-05-09 | Bridgestone Corporation | Pneumatic radial tires with specified profile |
| US6102094A (en) * | 1995-09-08 | 2000-08-15 | Bridgestone Corporation | Pneumatic radial tire including high-hardness rubber |
| US6192952B1 (en) | 1995-09-08 | 2001-02-27 | Bridgestone Corporation | Pneumatic radial tires |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2649173B2 (en) | 1997-09-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8905101B2 (en) | Run flat tire | |
| EP1508457B1 (en) | Pneumatic tyre | |
| JPH0445366B2 (en) | ||
| EP0339872A2 (en) | Pneumatic tyre | |
| US4589461A (en) | Pneumatic belted tires | |
| JP3364256B2 (en) | Pneumatic tire | |
| JPH0924710A (en) | Pneumatic tire | |
| JP3125109B2 (en) | Pneumatic radial tires for passenger cars | |
| JPH01314611A (en) | Pneumatic tire | |
| US6786260B2 (en) | Pneumatic radial tire for negative camber angle suspension | |
| JPH02162104A (en) | Pneumatic tire | |
| JP2005297752A (en) | Pneumatic tire | |
| JP4995560B2 (en) | Run flat tire | |
| JP4212960B2 (en) | Pneumatic tire | |
| JP3015347B1 (en) | Pneumatic tire | |
| JP4133210B2 (en) | Tires for motorcycles | |
| JPH09300920A (en) | Wasteland travelling pneumatic tire | |
| JP3064265B2 (en) | Pneumatic tire | |
| JP2003200717A (en) | Pneumatic tire | |
| JP2613042B2 (en) | Radial tires for passenger cars | |
| JPH06166306A (en) | Pneumatic tire | |
| JPH06344729A (en) | Pneumatic tire | |
| JP2022130091A (en) | pneumatic tire | |
| JP2021160696A (en) | Pneumatic tire | |
| JP2006051871A (en) | Pneumatic tire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |