JP4312114B2 - Tire silencer - Google Patents

Tire silencer Download PDF

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Publication number
JP4312114B2
JP4312114B2 JP2004203590A JP2004203590A JP4312114B2 JP 4312114 B2 JP4312114 B2 JP 4312114B2 JP 2004203590 A JP2004203590 A JP 2004203590A JP 2004203590 A JP2004203590 A JP 2004203590A JP 4312114 B2 JP4312114 B2 JP 4312114B2
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tire
rim
inner peripheral
peripheral surface
annular base
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JP2006021723A (en
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直樹 湯川
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Priority to JP2004203590A priority Critical patent/JP4312114B2/en
Priority to EP05003950A priority patent/EP1574360B1/en
Priority to CNB2005100535479A priority patent/CN100360326C/en
Priority to US11/076,058 priority patent/US7213624B2/en
Publication of JP2006021723A publication Critical patent/JP2006021723A/en
Priority to US11/733,006 priority patent/US7886789B2/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
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/002—Noise damping elements provided in the tyre structure or attached thereto, e.g. in the tyre interior

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  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Description

本発明は、タイヤ内腔に装着することにより走行中のロードノイズを低減するタイヤの制音具に関する。   The present invention relates to a tire noise control device that reduces road noise during traveling by being mounted in a tire lumen.

タイヤにより生じる騒音には様々なものがあるが、中でも荒れた路面を走行した際に５０〜４００Ｈｚの周波数範囲で「ゴー」という音が生じるいわゆるロードノイズは、車内に伝達されて車室内でのこもり音となり乗員に不快感を与える。そしてこのロードノイズは、タイヤとリムとが囲むタイヤ内腔が気柱管を構成して、空気が共鳴振動（空洞共鳴）することが主原因であることが知られている。   There are various types of noise generated by tires, but the so-called road noise that produces a “go” sound in the frequency range of 50 to 400 Hz when traveling on rough roads is transmitted to the interior of the vehicle and It becomes a murmur and gives discomfort to the passengers. And it is known that this road noise is mainly caused by a tire lumen surrounded by a tire and a rim forming an air column tube, and resonance vibration (cavity resonance) of air.

そこで、本出願人は、スポンジを用いた制音用の帯状シートをタイヤ内腔内に配置し、このような空洞共鳴を効果的に抑制してロードノイズを低減することを提案している（例えば、特許文献１参照）。   In view of this, the present applicant has proposed that a band-like sheet for sound control using a sponge is disposed in the tire lumen to effectively suppress such cavity resonance and reduce road noise ( For example, see Patent Document 1).

さらに本出願人は、高速走行中タイヤ内腔内に自由状態で配される帯状シートが位置ズレし、そのズレによる損傷、振動の発生等を防止するため、帯状シートをトレッド下のタイヤ内腔面に接着剤を用いて固定することを提案している（例えば、特許文献２参照）。   Furthermore, the present applicant has determined that the belt-like sheet placed in a free state in the tire lumen during high-speed running is displaced and the belt-like sheet is placed under the tire lumen under the tread in order to prevent damage, vibration, etc. due to the displacement. It has been proposed to fix the surface using an adhesive (for example, see Patent Document 2).

特開２００２−６７６０８号公報JP 2002-67608 A 特開２００３−６３２０８号公報JP 2003-63208 A

しかしながら、スポンジ製の帯状シートをタイヤ内面に装着するのみでは、制音具が起動、制動時の相対移動により欠け、摩耗などの損傷を受ける場合があり、又接着するものは、接着剤塗布、帯状シートの位置決め、接着剤硬化などタイヤ内部での作業を必要とするため、特にタイヤのリム組の際に装着する場合には、リム組み時間を延長しかつその能率を低下させる。また接着剤の保存、接着後の養生などに手間を要する。   However, only by attaching a sponge belt-like sheet to the inner surface of the tire, the sound damper may be damaged due to activation, relative movement during braking, chipping, abrasion, etc. Since work inside the tire, such as positioning of the belt-like sheet and curing of the adhesive, is required, particularly when the tire is mounted on the rim assembly of the tire, the rim assembly time is extended and its efficiency is lowered. In addition, it takes time to store the adhesive and to cure the adhesive.

そこで本発明は、リムに装着される環状基体を具えることを基本として、リム組み作業の能率を高めることができ、かつ空洞共鳴の抑制効果を維持しうるタイヤの制音具を提供することを目的としている。   SUMMARY OF THE INVENTION Accordingly, the present invention provides a tire noise suppressor capable of improving the efficiency of rim assembly work and maintaining the effect of suppressing cavity resonance, on the basis of providing an annular base body mounted on a rim. It is an object.

前記目的を達成するために、本願請求項１に係る発明は、リムと、このリムに装着される空気入りタイヤとがなすタイヤ内腔に装着されるタイヤの制音具であって、
比重０．００５〜０．０６０のスポンジ材からなり、かつ前記装着によりリムの内腔面と接触しながらタイヤ周方向に一周する内周面を有する環状基体を具え、
前記環状基体は、前記タイヤ内腔に装着されない自由状態でのタイヤ軸を含む断面において、
断面積Ｓを１〜６０ｃｍ2 、
さらに自由状態での前記内周面の直径Ｒ（単位：ｃｍ）を前記内腔面の直径Ｒｔの０．９〜１．１０倍、かつ２．２６Ｄ−２≦Ｒ≦２．２６Ｄ＋３ −−−（１）
タイヤ軸方向の巾Ｗ（単位：ｃｍ）を前記内周面で１〜１８ｃｍ、
かつＷ≦０．５Ｄ−０．５−−−（２）、
該内周面から外周端に向かって巾が一定又は減少し、
前記内周面から外周端までの高さＨ（単位：ｃｍ）を０．５〜６．０ｃｍ、
かつＨ≦−０．０２５Ｄ 2 ＋１．１３Ｄ−７ −−−（３）、
（式中のＤは、リムの呼び径（単位インチ））
としたことを特徴としている。
In order to achieve the above object, the invention according to claim 1 of the present application is a tire sound control device mounted in a tire lumen formed by a rim and a pneumatic tire mounted on the rim,
An annular base body having an inner peripheral surface made of a sponge material having a specific gravity of 0.005 to 0.060 and having a circumference in the tire circumferential direction while being in contact with the lumen surface of the rim by the mounting;
In the cross section including the tire shaft in a free state where the annular base body is not mounted in the tire lumen,
The cross-sectional area S is 1 to 60 cm 2 ,
Further, the diameter R (unit: cm) of the inner peripheral surface in a free state is 0.9 to 1.10 times the diameter Rt of the lumen surface, and 2.26D-2 ≦ R ≦ 2.26D + 3 −−−. (1)
The width W (unit: cm) in the tire axial direction is 1 to 18 cm on the inner peripheral surface,
And W ≦ 0.5D−0.5− (2),
The width is constant or decreases from the inner peripheral surface toward the outer peripheral end,
Height H (unit: cm) from the inner peripheral surface to the outer peripheral end is 0.5 to 6.0 cm,
And H ≦ −0.025D 2 + 1.13D-7 (3)
(D in the formula is the nominal diameter of the rim (unit: inch))
It is characterized by that.

又請求項２の発明では、自由状態での前記内周面の直径Ｒ（単位：ｃｍ）を前記内腔面の直径Ｒｔの０．９以上かつ１．００倍未満の範囲としたことを特徴としている。
In the invention of claim 2, the diameter R (unit: cm) of the inner peripheral surface in a free state is in a range of 0.9 or more and less than 1.00 times the diameter Rt of the lumen surface. It is said.

又請求項３の発明では、前記環状基体は、エーテル系ポリウレタンスポンジからなること、又請求項４の発明では、前記環状基体は、継目のない環状をなすこと、又請求項５の発明では、前記環状基体は、長尺な棒状体の両端を接続した継目を有する環状をなすこと、又請求項６の発明では、前記環状基体は、前記内周面に両面テープを有することを特徴としている。   In the invention of claim 3, the annular substrate is made of an ether-based polyurethane sponge. In the invention of claim 4, the annular substrate has a seamless annular shape. In the invention of claim 5, The annular substrate has an annular shape having a seam connecting both ends of a long rod-like body. In the invention of claim 6, the annular substrate has a double-sided tape on the inner peripheral surface. .

本発明の制音具は、叙上の如く構成しているため、スポンジ材の弾性によって、リムの内腔面上に弾性的にかつ容易に嵌着することができ、タイヤ又はリムとの接着作業を排除しうる。そのため、制音具の取付け作業効率を大巾に高めることができ、かつ接着剤の廃止に伴うコストダウンを達成しうる。又接着剤の劣化の影響がなく、接着剥がれ等による損傷を防止しうるなど制音具の耐久性を向上させることができる。   Since the sound control device of the present invention is configured as described above, it can be elastically and easily fitted onto the inner surface of the rim by the elasticity of the sponge material, and can be bonded to the tire or the rim. Work can be eliminated. Therefore, it is possible to greatly increase the efficiency of attaching the noise control tool, and it is possible to achieve cost reduction associated with the abolition of the adhesive. In addition, the durability of the sound control device can be improved, for example, without being affected by the deterioration of the adhesive and preventing damage due to adhesion peeling.

以下、本発明の実施の一形態を、図示例とともに説明する。
図１は、リム２と、このリム２に装着される空気入りタイヤ（以下、タイヤともいう）３との組立体（以下、単に組立体ということがある）Ａの断面図であり、本発明に係る制音具１は、前記組立体Ａのタイヤ内腔５内に装着される環状基体７として形成される。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an assembly A (hereinafter also simply referred to as an assembly) A of a rim 2 and a pneumatic tire (hereinafter also referred to as a tire) 3 attached to the rim 2. The sound damping tool 1 according to the above is formed as an annular base body 7 mounted in the tire lumen 5 of the assembly A.

前記タイヤ３は、チューブレスタイヤであって、路面に接地するトレッド部１２と、その両端から半径方向内方にのびる一対のサイドウォール部１３と、その半径方向内方端に位置するビード部１４とを具える。前記タイヤ内腔５を囲む内腔面５ｓのうち、タイヤ側の内腔面５ｓ１は、低空気透過性ゴムからなる所謂インナーライナゴムで形成され、これによって、タイヤ３はリム２とで気密なタイヤ内腔５を形成している。なお本例では、タイヤ３として、騒音低下が強く要求される乗用車用ラジアルタイヤを用いた場合を例示している。   The tire 3 is a tubeless tire, and includes a tread portion 12 that contacts a road surface, a pair of sidewall portions 13 that extend radially inward from both ends thereof, and a bead portion 14 that is positioned at the radially inner end thereof. With Of the inner cavity surface 5s surrounding the tire inner cavity 5, the inner cavity surface 5s1 on the tire side is formed of a so-called inner liner rubber made of a low air permeability rubber, whereby the tire 3 is airtight with the rim 2. A tire lumen 5 is formed. In this example, a case where a radial tire for a passenger car that is strongly required to reduce noise is used as the tire 3 is illustrated.

又前記リム２は、前記ビード部１４が装着される環状のリム本体２ａと、このリム本体２ａを保持するディスク２ｂとを具える。前記リム本体２ａは、図３に拡大して示す如く、ビード部１４のビード底面１４ａが着座するリムベース２ａ１と、そのタイヤ軸方向外端から半径方向外方に立ち上がるリムフランジ２ａ２と、前記リムベース２ａ１のタイヤ軸方向内端間を継ぐウエル部２ａ３とを一体に具える。そして、このウエル部２ａ３の外周面により、前記内腔面５ｓのうちのリム側の内腔面５ｓ２を形成している。なお前記リム２として、正規リムが好適に採用できる。「正規リム」とは、タイヤが基づいている規格を含む規格体系において、各規格がタイヤ毎に定めているリムであり、ＪＡＴＭＡであれば標準リム、ＴＲＡであれば "Design Rim" 、ＥＴＲＴＯであれば "Measuring Rim"を意味する。   The rim 2 includes an annular rim body 2a on which the bead portion 14 is mounted, and a disk 2b that holds the rim body 2a. 3, the rim body 2a includes a rim base 2a1 on which a bead bottom surface 14a of the bead portion 14 is seated, a rim flange 2a2 that rises radially outward from an outer end in the tire axial direction, and the rim base 2a1. And a well portion 2a3 connecting the inner ends in the tire axial direction. The outer peripheral surface of the well portion 2a3 forms the rim side lumen surface 5s2 of the lumen surface 5s. As the rim 2, a regular rim can be suitably used. “Regular rim” is a rim that is defined for each tire in the standard system including the standard on which the tire is based. For JATA, it is a standard rim, for TRA it is “Design Rim”, and for ETRTO If present, it means "Measuring Rim".

次に、前記環状基体７は、海綿状の多孔構造体であるスポンジ材からなり、リム２への装着により、前記リム側の内腔面５ｓ２とは接触しつつタイヤ周方向に一周する内周面７ｓを有する環状に形成される。   Next, the annular base body 7 is made of a sponge material which is a sponge-like porous structure, and is attached to the rim 2 so as to make an inner circumference that makes a round in the tire circumferential direction while being in contact with the lumen surface 5s2 on the rim side. It is formed in an annular shape having a surface 7s.

前記スポンジ材としては、例えばゴム、合成樹脂を発泡させ、連続気泡を有する所謂スポンジ、及び動物繊維、植物繊維又は合成繊維等を絡み合わせて一体に連結したウエブ状のものを含む。又連続気泡のみならず、独立気泡を有するものも使用しうるが、吸音性の観点から連続気孔を有するものが好ましい。このようなスポンジ材は、防振性、吸音性が高いため、前記タイヤ内腔５内で生じた音エネルギーを効果的に吸収でき、空洞共鳴を抑制することによりロードノイズを低減し、制音しうる。   Examples of the sponge material include a so-called sponge in which rubber or synthetic resin is foamed to have open cells, and a web-like material in which animal fibers, plant fibers, or synthetic fibers are intertwined and connected together. Although not only open cells but also those having closed cells can be used, those having open pores are preferred from the viewpoint of sound absorption. Such a sponge material has high vibration-proofing and sound-absorbing properties, so that it can effectively absorb the sound energy generated in the tire lumen 5, and can reduce road noise by suppressing cavity resonance, thereby reducing noise. Yes.

具体的には、前記スポンジ材として、例えばエーテル系ポリウレタンスポンジ、エステル系ポリウレタンスポンジ、ポリエチレンスポンジなどの合成樹脂スポンジ、クロロプレンゴムスポンジ（ＣＲスポンジ）、エチレンプロピレンゴムスポンジ（ＥＤＰＭスポンジ）、ニトリルゴムスポンジ（ＮＢＲスポンジ）などのゴムスポンジが好適に採用できる。特にエーテル系ポリウレタンスポンジを含むポリウレタン系、又はポリエチレン系等のスポンジは、制音性、軽量性，発泡の調節可能性、耐久性などの観点から好ましく用いうる。このようなエーテル系ポリウレタンスポンジとして、例えば、丸鈴株式会社製の品番Ｅ１６のものが挙げられる。   Specifically, as the sponge material, for example, ether type polyurethane sponge, ester type polyurethane sponge, synthetic resin sponge such as polyethylene sponge, chloroprene rubber sponge (CR sponge), ethylene propylene rubber sponge (EDPM sponge), nitrile rubber sponge ( A rubber sponge such as NBR sponge) can be suitably used. In particular, polyurethane-based or polyethylene-based sponges including ether-based polyurethane sponges can be preferably used from the viewpoints of sound damping properties, light weight, foamability controllability, durability, and the like. As such an ether type polyurethane sponge, for example, a product number E16 manufactured by Maruzu Co., Ltd. may be mentioned.

又前記スポンジ材では、その比重が０．００５〜０．０６０の範囲であることが必要であり、その下限値を０．０１０、さらには０．０１６以上とするのが好ましい。又上限値は０．０５０未満、さらには０．０３５未満であるのが好ましく、この上限値、下限値は自在に組合せ得る。前記比重が０．００５未満又は０．０６０を超えると、気孔比率などの点で空洞共鳴を抑える効果が低下する傾向がある。又このように低比重とすることにより、タイヤ重量およびタイヤバランスへの悪影響を低く抑ることができ、かつ空隙率を増して吸音性を高めうる。   The sponge material needs to have a specific gravity in the range of 0.005 to 0.060, and the lower limit is preferably 0.010, more preferably 0.016 or more. The upper limit value is preferably less than 0.050, and more preferably less than 0.035, and the upper limit value and the lower limit value can be freely combined. When the specific gravity is less than 0.005 or exceeds 0.060, the effect of suppressing cavity resonance tends to decrease in terms of the pore ratio. In addition, by making the specific gravity low in this way, adverse effects on the tire weight and the tire balance can be suppressed to a low level, and the porosity can be increased to improve the sound absorption.

次に、前記環状基体７では、自由状態（図４に示す）における内周面７ｓの直径Ｒが、図１、３に示すように、前記リム側の内腔面５ｓ２の直径Ｒｔに対して０．９〜１．１０倍の大きさに形成される。   Next, in the annular base body 7, the diameter R of the inner peripheral surface 7 s in the free state (shown in FIG. 4) is larger than the diameter Rt of the rim side lumen surface 5 s 2 as shown in FIGS. The size is 0.9 to 1.10 times.

なお前記内腔面５ｓ２の直径Ｒｔは、前記ウエル部２ａ３の外周形状のタイヤ軸方向への変化により異なるが、環状基体７は、通常、内腔面５ｓ２の最少径位置でタイヤ軸方向への移動が抑えられた安定状態で保持されることとなる。そのため、本明細書においては、前記リム側の内腔面５ｓ２の直径Ｒｔは、該内腔面５ｓ２の最少径部における直径を意味し、又前記環状基体７の内周面７ｓの直径Ｒは、該内周面７ｓの最少径部における直径を意味する。   The diameter Rt of the lumen surface 5s2 differs depending on the change in the outer peripheral shape of the well portion 2a3 in the tire axial direction. However, the annular base body 7 is normally positioned at the minimum diameter position of the lumen surface 5s2 in the tire axial direction. It is held in a stable state in which movement is suppressed. Therefore, in this specification, the diameter Rt of the lumen surface 5s2 on the rim side means the diameter of the smallest diameter portion of the lumen surface 5s2, and the diameter R of the inner peripheral surface 7s of the annular base body 7 is , Meaning the diameter of the smallest diameter portion of the inner peripheral surface 7s.

ここで、前記環状基体７は、前記直径の比Ｒ／Ｒｔが０．９以上かつ１．００未満の範囲（０．９≦Ｒ／Ｒｔ＜１．０）では、前記内腔面５ｓ２とは圧接状態で嵌着される。そのため、始動停止を含む走行状態において、前記環状基体７の位置ズレを抑えることが可能となり、スポンジ材の欠け、摩耗などの損傷を確実に抑制できる。しかしその反面、前記嵌着の場合には、環状基体７をリム２に装着する際、リムフランジ２ａ２を乗り越えさせるために必要な環状基体７への引き伸しが大きくなる。そのため、装着作業性に不利であり、又装着時に環状基体７を傷つける恐れも生じる。このような観点から、前記比Ｒ／Ｒｔの下限値は、０．９以上であることが必要であり、好ましくは０．９３以上、さらに好ましくは０．９５以上である。   Here, the annular base body 7 is defined as the lumen surface 5s2 when the ratio R / Rt of the diameters is 0.9 or more and less than 1.00 (0.9 ≦ R / Rt <1.0). It is fitted in the pressure contact state. Therefore, in the running state including start and stop, it is possible to suppress the positional deviation of the annular base body 7, and it is possible to reliably suppress damage such as chipping and abrasion of the sponge material. On the other hand, in the case of the fitting, when the annular base body 7 is attached to the rim 2, the extension to the annular base body 7 necessary for getting over the rim flange 2a2 becomes large. Therefore, it is disadvantageous for the mounting workability, and there is a risk that the annular base body 7 may be damaged at the time of mounting. From such a viewpoint, the lower limit value of the ratio R / Rt needs to be 0.9 or more, preferably 0.93 or more, and more preferably 0.95 or more.

他方、環状基体７は、前記比Ｒ／Ｒｔが１．００以上かつ１．１０以下の範囲（１．０≦Ｒ／Ｒｔ≦１．１０）では、前記内腔面５ｓ２とは非圧接の接触状態で遊挿される。このとき環状基体７は、前記ウエル部２ａ３の側壁間でタイヤ軸方向の位置ズレが拘束される。しかも前記比Ｒ／Ｒｔが１．１０以下の範囲では、前記内腔面５ｓ２と内周面７ｓとの接触面積が大きく確保されるため、周方向の位置ズレが抑制されるとともに、環状基体７のたるみ部分が回転によってタイヤ側の内腔面５ｓ１と接触するのを防止できる。このように、前記遊挿の場合には、リム側の内腔面５ｓ２との擦れにはやや不利であるものの、リム側内腔面５ｓ２の摩擦係数が充分に低く、かつ位置ズレ量も低く抑えられるため、リム側の内腔面５ｓ２との擦れによる損傷は抑制される。又摩擦係数が大なタイヤ側の内腔面５ｓ１とは、接触自体を防止しうるため損傷を回避しうるのである。このような観点から、前記比Ｒ／Ｒｔの上限値は、１．１０以下であることが必要であり、好ましくは１．０５以下である。なおこの上限値、下限値は自在に組合せ得る。   On the other hand, when the ratio R / Rt is in the range of 1.00 to 1.10 (1.0 ≦ R / Rt ≦ 1.10), the annular base body 7 is in non-pressure contact with the lumen surface 5s2. It is loosely inserted in the state. At this time, the positional displacement of the annular base body 7 in the tire axial direction is restricted between the side walls of the well portion 2a3. Moreover, in the range where the ratio R / Rt is 1.10 or less, a large contact area is secured between the lumen surface 5s2 and the inner peripheral surface 7s. It is possible to prevent the slack portion of the tire from coming into contact with the bore surface 5s1 on the tire side by rotation. As described above, in the case of the loose insertion, although it is slightly disadvantageous for rubbing against the rim side lumen surface 5s2, the coefficient of friction of the rim side lumen surface 5s2 is sufficiently low and the displacement amount is also low. Therefore, damage caused by rubbing with the lumen surface 5s2 on the rim side is suppressed. Further, since the contact with the lumen surface 5s1 on the tire side having a large friction coefficient can be prevented, damage can be avoided. From such a viewpoint, the upper limit value of the ratio R / Rt needs to be 1.10 or less, and preferably 1.05 or less. The upper limit value and the lower limit value can be freely combined.

又前記環状基体７は、ウエル部２ａ３に填め込むだけで、接着剤などの固着手段を用いることなく確実にリムの装着できる。従って、環状基体７の取付け作業が簡単となり、熟練を必要としない上、作業能率がアップし、しかも接着剤についての管理、作業を省くことができ品質、性能の安定にもつながる。   The annular base body 7 can be securely attached to the well portion 2a3 without using a fixing means such as adhesive. Therefore, the mounting work of the annular base body 7 is simplified, skill is not required, work efficiency is improved, and management and work on the adhesive can be omitted, leading to stable quality and performance.

又前記環状基体７では、前記自由状態において、図４に示す如く、内周面７ｓから外周端７ｂまでの高さＨは、０．５〜６．０ｃｍの範囲であり、０．５ｃｍ未満では、空洞共鳴音の低減効果が過少となり、逆に６．０ｃｍを超えると、リム組時にビード部１４と干渉して、スポンジが破損する恐れがある。従って、前記高さＨの下限値は、１．５ｃｍ以上、さらには２．０ｃｍ以上であるのが好ましく、又その上限値は、５．０ｃｍ以下、さらに好ましくは３．５ｃｍ以下であるのが好ましい。なおこの上限値、下限値は自在に組合せ得る。   In the annular base 7, in the free state, as shown in FIG. 4, the height H from the inner peripheral surface 7s to the outer peripheral end 7b is in the range of 0.5 to 6.0 cm. The effect of reducing the cavity resonance sound becomes too small. Conversely, if it exceeds 6.0 cm, the sponge may be damaged due to interference with the bead portion 14 when the rim is assembled. Accordingly, the lower limit value of the height H is preferably 1.5 cm or more, more preferably 2.0 cm or more, and the upper limit value thereof is 5.0 cm or less, more preferably 3.5 cm or less. preferable. The upper limit value and the lower limit value can be freely combined.

又前記環状基体７では、前記自由状態において、タイヤ軸を含む子午断面における断面積Ｓは、１〜６０ｃｍ2 の範囲であり、１ｃｍ2 未満では、タイヤ内腔５内での空洞共鳴の音エネルギーを吸収する効果が不足して、タイヤ振動の抑制効果が低下する傾向となる。又断面積Ｓが６０ｃｍ2 を超えると、タイヤ重量およびタイヤの重量バランスに影響を与える恐れがある。従って、前記断面積Ｓの下限値は、３ｃｍ2 以上、さらには１０ｃｍ2 以上であるのが好ましく、又その上限値は、４０ｃｍ2 以下、さらには３０ｃｍ2 以下であるのが好ましい。なおこの上限値、下限値は自在に組合せ得る。 Also in the annular base body 7, in the free state, the sectional area S of the tire axis in the meridian cross section is in the range of 1～60Cm 2, it is less than 1 cm 2, sound energy of cavity resonance within the lumen 5 Tire As a result, the tire vibration suppressing effect tends to decrease. If the cross-sectional area S exceeds 60 cm 2 , the tire weight and the tire weight balance may be affected. Therefore, the lower limit value of the cross-sectional area S is preferably 3 cm 2 or more, more preferably 10 cm 2 or more, and the upper limit value is preferably 40 cm 2 or less, more preferably 30 cm 2 or less. The upper limit value and the lower limit value can be freely combined.

又前記環状基体７では、前記自由状態において、タイヤ軸方向の前記内周面７ｓでの巾Ｗは、１〜１８ｃｍの範囲であり、前記巾Ｗが１ｃｍ未満では、前記した断面積Ｓに関連して、制音具１の取付け時において半径方向に形状を保持することが困難となり、倒れにより制音性の低下を招く傾向となる。又巾Ｗが１８ｃｍを超えると、環状基体７が薄肉化して、制音効果、耐久性を低下させる。従って、前記巾Ｗの下限値は、２ｃｍ以上、さらには２．５ｃｍ以上であるのが好ましく、又その上限値は１４ｃｍ以下、さらには１０ｃｍ以下であるのが好ましい。なおこの上限値、下限値は自在に組合せ得る。   Moreover, in the said annular base | substrate 7, in the said free state, the width W in the said inner peripheral surface 7s of a tire axial direction is the range of 1-18 cm, and when the said width W is less than 1 cm, it is related to the above-mentioned cross-sectional area S. And it becomes difficult to hold | maintain a shape to radial direction at the time of attachment of the noise suppression tool 1, and it becomes the tendency for the sound-damping property to fall by falling. On the other hand, if the width W exceeds 18 cm, the annular substrate 7 is thinned, and the sound damping effect and durability are lowered. Therefore, the lower limit value of the width W is preferably 2 cm or more, more preferably 2.5 cm or more, and the upper limit value thereof is preferably 14 cm or less, more preferably 10 cm or less. The upper limit value and the lower limit value can be freely combined.

ここで本発明者は、環状基体７の前記直径Ｒ（単位：ｃｍ）、巾Ｗ（単位：ｃｍ）、及び高さＨ（単位：ｃｍ）について、リム２に無理なく装着でき、かつ位置ズレなどを招くことなく安定して保持させるために、リム２との相関を求めた。その結果を図５〜７に示す。リム２として、乗用車用タイヤに一般的に用いられる深底リムを使用した。   Here, the inventor can easily attach the rim 2 to the rim 2 with respect to the diameter R (unit: cm), the width W (unit: cm), and the height H (unit: cm) of the annular base body 7, and the positional deviation. The correlation with the rim 2 was obtained in order to stably hold it without incurring the above. The results are shown in FIGS. As the rim 2, a deep bottom rim generally used for passenger car tires was used.

図５は、環状基体７の前記直径Ｒを２５〜６０ｃｍの範囲で、かつリム２の呼び径Ｄを１０〜２２インチの範囲でそれぞれ変化させて行った、環状基体７の装着テストのデータを解析した結果である。そしてその解析結果から、環状基体７は、次式（１）を充足する範囲領域、図５においては斜線部の領域αにおいて、リム２に無理なく装着でき、かつ位置ズレなく安定して保持しうることが判明した。
２．２６Ｄ−２≦Ｒ≦２．２６Ｄ＋３ −−−（１） FIG. 5 shows the data of the mounting test of the annular substrate 7 performed by changing the diameter R of the annular substrate 7 in the range of 25 to 60 cm and changing the nominal diameter D of the rim 2 in the range of 10 to 22 inches. It is the result of analysis. From the analysis results, the annular base body 7 can be attached to the rim 2 without difficulty and stably held in a range area satisfying the following equation (1), that is, a hatched area α in FIG. It turned out to be possible.
2.26D-2 ≦ R ≦ 2.26D + 3 (1)

又図６は、環状基体７の前記巾Ｗを４．５〜１０．５ｃｍの範囲で、かつリム２の呼び径Ｄを１０〜２２インチの範囲でそれぞれ変化させて行った、環状基体７の装着テストのデータを解析した結果である。そしてその解析結果から、環状基体７は、次式（２）を充足する範囲領域、図６においては斜線部の領域βにおいて、リム２に無理なく装着でき、かつ位置ズレなく安定して保持しうることが判明した。
Ｗ≦０．５Ｄ−０．５ −−−（２） Further, FIG. 6 shows the annular substrate 7 in which the width W of the annular substrate 7 is changed in the range of 4.5 to 10.5 cm and the nominal diameter D of the rim 2 is changed in the range of 10 to 22 inches. It is the result of analyzing the data of the mounting test. From the analysis results, the annular base body 7 can be attached to the rim 2 without difficulty and stably held in the range region satisfying the following expression (2), that is, the shaded region β in FIG. It turned out to be possible.
W ≦ 0.5D−0.5 (2)

又図７は、環状基体７の前記高さＨを１．５〜５．５ｃｍの範囲で、かつリム２の呼び径Ｄを１０〜２２インチの範囲でそれぞれ変化させて行った、環状基体７の装着テストのデータを解析した結果である。そしてその解析結果から、環状基体７は、次式（３）を充足する範囲領域、図７においては斜線部の領域γにおいて、リム２に無理なく装着でき、かつ位置ズレなく安定して保持しうることが判明した。
Ｈ≦−０．０２５Ｄ2 ＋１．１３Ｄ−７ −−−（３）
従って、前記環状基体７では、リム２への装着を容易としかつ位置ズレなく安定して保持させるために、前記式（１）〜（３）をそれぞれ充足させることが好ましい。 FIG. 7 shows an annular substrate 7 which is obtained by changing the height H of the annular substrate 7 in the range of 1.5 to 5.5 cm and the nominal diameter D of the rim 2 in the range of 10 to 22 inches. It is the result of analyzing the data of the wearing test of. From the analysis results, the annular base body 7 can be attached to the rim 2 without difficulty and stably held in a range area satisfying the following expression (3), that is, a hatched area γ in FIG. It turned out to be possible.
H ≦ −0.025D 2 + 1.13D-7 (3)
Therefore, in order to make the annular base body 7 easy to be attached to the rim 2 and stably held without positional deviation, it is preferable to satisfy the above formulas (1) to (3).

次に本例では、環状基体７として、その断面形状が、図４に示すように、前記内周面７ｓから外周端７ｂに向かってタイヤ軸方向の巾を漸減させた台形形状をなす場合を例示している。このように内周面７ｓでの断面巾Ｗが大で外周端７ｂ側の巾を小さくすることにより、環状基体７が内腔面５ｓ２に対し安定して圧接支持されるため、高速走行でも位置ズレを起こすことがなく、空洞共鳴抑制効果を持続できる。又内周面７ｓから外周端７ｂに向かって巾を一定とするなど種々な形状をなしうるが、三角状など、外周端７ｂを先鋭とするのは、制音効果を低下するため好ましくない。   Next, in this example, the case where the cross-sectional shape of the annular base body 7 has a trapezoidal shape in which the width in the tire axial direction is gradually reduced from the inner peripheral surface 7s toward the outer peripheral end 7b as shown in FIG. Illustrated. As described above, since the cross-sectional width W of the inner peripheral surface 7s is large and the width on the outer peripheral end 7b side is reduced, the annular base body 7 is stably pressed against and supported by the lumen surface 5s2, so that the position can be achieved even at high speeds. The cavity resonance suppression effect can be maintained without causing any deviation. Further, various shapes such as a constant width from the inner peripheral surface 7s toward the outer peripheral end 7b can be formed, but it is not preferable to sharpen the outer peripheral end 7b such as a triangular shape because the sound damping effect is lowered.

又前記環状基体７では、その内周面７ｓをタイヤ軸と平行な平滑面とするのが、汎用性、即ち種々な品種のリムへの取付け性の観点から好ましいが、より安定した着座のために、内周面７ｓを内腔面５ｓ２の輪郭形状に合わせたプロファイルで形成するのも好ましい。   Further, in the annular base body 7, it is preferable that the inner peripheral surface 7s be a smooth surface parallel to the tire axis from the viewpoint of versatility, that is, mountability to various types of rims, but for more stable seating. Moreover, it is also preferable to form the inner peripheral surface 7s with a profile that matches the contour shape of the lumen surface 5s2.

又なお前記環状基体７では、その内周面７ｓの少なくとも一部に両面テープを添着しておくこともできる。これにより、リム２への装着に際して環状基体７の位置決めが容易に行えるとともに、環状基体７の位置ズレ防止の信頼性が更に高められる点で好ましい。なお前記両面テープは、１箇所のみ設けるのが好ましいが、周方向に間隔を隔て複数箇所設けても良い。   In the annular substrate 7, a double-sided tape can be attached to at least a part of the inner peripheral surface 7s. Accordingly, it is preferable in that the annular base body 7 can be easily positioned when mounted on the rim 2 and the reliability of preventing the positional deviation of the annular base body 7 is further enhanced. The double-sided tape is preferably provided only at one location, but may be provided at a plurality of locations at intervals in the circumferential direction.

又前記環状基体７は、周方向に継目のない環状のスポンジ体として形成することができる。しかし、例えば長尺な棒状のスポンジ体（棒状体）を用い、その両端を両面テープや接着材などで接続することで、周方向に継目を有する環状に形成しても良い。   The annular base body 7 can be formed as an annular sponge body that is seamless in the circumferential direction. However, for example, a long rod-shaped sponge body (bar-shaped body) may be used, and both ends thereof may be connected with a double-sided tape, an adhesive, or the like to form an annular shape having a seam in the circumferential direction.

以上、本発明の特に好ましい実施形態について詳述したが、本発明は図示の実施形態に限定されることなく、種々の態様に変形して実施しうる。   As mentioned above, although especially preferable embodiment of this invention was explained in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

リムサイズが１５×６の深底リム用の制音具を表１の仕様で試作するとともに、この制音具をタイヤ（１９５／６５Ｒ１５）とリムの組立体に装着して、ドラム耐久試験および実車走行によるロードノイズ試験を行った。   A prototype of a rim size 15x6 sound absorber for deep bottom rims was made with the specifications shown in Table 1, and this sound absorber was mounted on a tire (195 / 65R15) and rim assembly to test drum durability and actual vehicles. A road noise test by running was performed.

（１）ドラム耐久試験；
ドラム径１．７ｍの走行試験機を用い、内圧（２００ｋＰａ）、荷重（６．５ｋＮ；ＪＡＴＭＡが規定する最大荷重１．２倍）、速度（１６０ｋｍ／ｈ）の条件にで走行試験を行い、１０分走行後の摩耗量を測定した。 (1) Drum durability test;
Using a running test machine with a drum diameter of 1.7 m, a running test was performed under the conditions of internal pressure (200 kPa), load (6.5 kN; maximum load 1.2 times specified by JATMA), and speed (160 km / h). The amount of wear after running for 10 minutes was measured.

（２）ロードノイズ試験；
前記ドラム耐久試験に使用したのと同じタイヤとリムの組立体を、車両（２０００ｃｃ、ＦＦ国産車）の全輪装着し、ロードノイズ計測路（アスファルト粗面路）を時速６０ｋｍ／ｈで走行したときの、運転席窓側耳位置における車内音を測定し、挟帯域２４０Ｈｚ付近の気柱共鳴音のピーク値の音圧レベルを測定した。制音性については、制音具を装着しない比較例１を１００とし、摩耗量については比較例２を、装着の容易さについては比較例３を１００として評価した。いずれも数値が大であるほど優れていることを示す。 (2) Road noise test;
The same tire and rim assembly used for the drum endurance test was mounted on all wheels of a vehicle (2000cc, FF domestic car), and the road noise measurement road (asphalt rough road) was run at a speed of 60 km / h. The vehicle interior sound at the driver's seat window side ear position was measured, and the sound pressure level of the peak value of the air column resonance sound near the narrow band 240 Hz was measured. With respect to the sound damping property, the comparative example 1 in which no sound control tool was mounted was evaluated as 100, the wear amount was evaluated as comparative example 2, and the ease of mounting was evaluated as 100 in comparative example 3. All show that it is so excellent that a numerical value is large.

Figure 0004312114
Figure 0004312114

本発明の制音具が組立体に取り付けられた一形態を例示する断面図である。It is sectional drawing which illustrates one form with which the noise suppression tool of this invention was attached to the assembly. そのタイヤ赤道に沿った周方向の断面図である。It is sectional drawing of the circumferential direction along the tire equator. 本発明の制音具の一実施の形態を、リム本体とともに拡大して示す断面図である。It is sectional drawing which expands and shows one Embodiment of the noise suppression tool of this invention with a rim body. 制音具の自由状態を示す断面図である。It is sectional drawing which shows the free state of a noise suppression tool. 直径Ｒとリムの呼び径Ｄとの関係を示すグラフである。It is a graph which shows the relationship between the diameter R and the nominal diameter D of a rim | limb. 断面巾Ｗとリムの呼び径Ｄとの関係を示すグラフである。It is a graph which shows the relationship between the cross-sectional width W and the nominal diameter D of a rim. 断面高さＨとリムの呼び径Ｄとの関係を示すグラフである。It is a graph which shows the relationship between the cross-sectional height H and the nominal diameter D of a rim.

符号の説明Explanation of symbols

１ 制音具
２ リム
３ 空気入りタイヤ
５ タイヤ内腔
５ｓ２ リム側の内腔面
７ 環状基体
７ｓ 内周面 DESCRIPTION OF SYMBOLS 1 Sound control tool 2 Rim 3 Pneumatic tire 5 Tire lumen 5 s2 Rim side lumen surface 7 Annular base 7s Inner peripheral surface

Claims (6)

リムと、このリムに装着される空気入りタイヤとがなすタイヤ内腔に装着されるタイヤの制音具であって、
比重０．００５〜０．０６０のスポンジ材からなり、かつ前記装着によりリムの内腔面と接触しながらタイヤ周方向に一周する内周面を有する環状基体を具え、
前記環状基体は、前記タイヤ内腔に装着されない自由状態でのタイヤ軸を含む断面において、
断面積Ｓを１〜６０ｃｍ2 、
さらに自由状態での前記内周面の直径Ｒ（単位：ｃｍ）を前記内腔面の直径Ｒｔの０．９〜１．１０倍、かつ２．２６Ｄ−２≦Ｒ≦２．２６Ｄ＋３ −−−（１）
タイヤ軸方向の巾Ｗ（単位：ｃｍ）を前記内周面で１〜１８ｃｍ、
かつＷ≦０．５Ｄ−０．５ −−−（２）
該内周面から外周端に向かって巾が一定又は減少し、
前記内周面から外周端までの高さＨ（単位：ｃｍ）を０．５〜６．０ｃｍ、
かつＨ≦−０．０２５Ｄ 2 ＋１．１３Ｄ−７ −−−（３）
（式中のＤは、リムの呼び径（単位インチ））
としたことを特徴とするタイヤの制音具。 A tire noise control device installed in a tire lumen formed by a rim and a pneumatic tire mounted on the rim,
An annular base body having an inner peripheral surface made of a sponge material having a specific gravity of 0.005 to 0.060 and having a circumference in the tire circumferential direction while being in contact with the lumen surface of the rim by the mounting;
In the cross section including the tire shaft in a free state where the annular base body is not mounted in the tire lumen,
The cross-sectional area S is 1 to 60 cm 2 ,
Further, the diameter R (unit: cm) of the inner peripheral surface in a free state is 0.9 to 1.10 times the diameter Rt of the lumen surface, and 2.26D-2 ≦ R ≦ 2.26D + 3 −−−. (1)
The width W (unit: cm) in the tire axial direction is 1 to 18 cm on the inner peripheral surface,
And W ≦ 0.5D−0.5 (2)
The width is constant or decreases from the inner peripheral surface toward the outer peripheral end,
Height H (unit: cm) from the inner peripheral surface to the outer peripheral end is 0.5 to 6.0 cm,
And H ≦ −0.025D 2 + 1.13D-7 (3)
(D in the formula is the nominal diameter of the rim (unit: inch))
A tire sound control device characterized by that. 自由状態での前記内周面の直径Ｒ（単位：ｃｍ）を前記内腔面の直径Ｒｔの０．９以上かつ１．００倍未満の範囲としたことを特徴とする請求項１記載のタイヤの制音具。 The tire according to claim 1 , wherein a diameter R (unit: cm) of the inner peripheral surface in a free state is in a range of 0.9 or more and less than 1.00 times the diameter Rt of the lumen surface. Sound control tool. 前記環状基体は、エーテル系ポリウレタンスポンジからなることを特徴とする請求項１又は２記載のタイヤの制音具。   3. The tire sound control device according to claim 1, wherein the annular base is made of an ether polyurethane sponge. 前記環状基体は、継目のない環状をなすことを特徴とする請求項１〜３のいずれかに記載のタイヤの制音具。   The tire sound control device according to any one of claims 1 to 3, wherein the annular base body has a seamless annular shape. 前記環状基体は、長尺な棒状体の両端を接続した継目を有する環状をなすことを特徴とする請求項１〜３のいずれかに記載のタイヤの制音具。   The tire sound-damping device according to any one of claims 1 to 3, wherein the annular base body has an annular shape having a seam connecting both ends of a long rod-like body. 前記環状基体は、前記内周面に両面テープを有することを特徴とする請求項１〜５のいずれかに記載のタイヤの制音具。   The tire sound-suppressing tool according to any one of claims 1 to 5, wherein the annular base has a double-sided tape on the inner peripheral surface.
JP2004203590A 2004-03-10 2004-07-09 Tire silencer Expired - Lifetime JP4312114B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2004203590A JP4312114B2 (en) 2004-07-09 2004-07-09 Tire silencer
EP05003950A EP1574360B1 (en) 2004-03-10 2005-02-23 Noise damper
CNB2005100535479A CN100360326C (en) 2004-03-10 2005-03-08 Noise damper
US11/076,058 US7213624B2 (en) 2004-03-10 2005-03-10 Noise damper and pneumatic tire with compensation tread groove
US11/733,006 US7886789B2 (en) 2004-03-10 2007-04-09 Pneumatic tire and interference fit noise damper

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4328047A2 (en) 2022-08-25 2024-02-28 Sumitomo Rubber Industries, Ltd. Tire-rim assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009286271A (en) * 2008-05-29 2009-12-10 Bridgestone Corp Sound absorption member, tire equipped with such sound absorption member, and assembly of tire and rim equipped with such sound absorption member
JP5299080B2 (en) * 2009-05-18 2013-09-25 横浜ゴム株式会社 Pneumatic tire

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4328047A2 (en) 2022-08-25 2024-02-28 Sumitomo Rubber Industries, Ltd. Tire-rim assembly

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