JP4113084B2 - Soundproof tire - Google Patents
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- JP4113084B2 JP4113084B2 JP2003340710A JP2003340710A JP4113084B2 JP 4113084 B2 JP4113084 B2 JP 4113084B2 JP 2003340710 A JP2003340710 A JP 2003340710A JP 2003340710 A JP2003340710 A JP 2003340710A JP 4113084 B2 JP4113084 B2 JP 4113084B2
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- sound absorbing
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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
Description
本発明は、防音機能を有するタイヤに関する。本発明の防音タイヤは、自動車，産業車両，航空機などのタイヤに利用することができる。 The present invention relates to a tire having a soundproof function. The soundproof tire of the present invention can be used for tires of automobiles, industrial vehicles, airplanes and the like.
主として路面の凹凸に起因する騒音を低減するために、自動車のタイヤに防音部材を設けることが行われている。例えば特開昭62−216803号公報には、加圧空気が充填される充填空洞のインフレート下における全内容積の25％以上、70％未満に相当する見掛け体積のドーナツ状をなし、見掛け密度が 0.1ｇ／cm3 以下の多孔質物質を配置することが記載されている。このような多孔質体よりなる吸音部材を配置することで、空洞内での共鳴音を低減することができ、ロードノイズを低減することができる。 In order to reduce noise mainly caused by road surface unevenness, a soundproof member is provided in an automobile tire. For example, Japanese Patent Application Laid-Open No. 62-216803 discloses an apparent volume of donuts having an apparent volume corresponding to 25% or more and less than 70% of the total internal volume under inflation of a filling cavity filled with pressurized air. Describes that a porous material having a particle size of 0.1 g / cm 3 or less is disposed. By arranging such a sound absorbing member made of a porous body, resonance sound in the cavity can be reduced, and road noise can be reduced.
また特開平07−052616号公報には、タイヤの内周面とリムの外周面とで囲まれた空洞内に、多孔質の吸音部材を移動可能に配設することが記載されている。しかし移動可能に配設したのでは、走行時に吸音部材がタイヤあるいはリムに衝突を繰り返すため、吸音部材の摩耗変形により防音効果が早期に消失してしまう。したがって多孔質の吸音部材は、タイヤ又はリムに固着することが望ましい。 Japanese Patent Application Laid-Open No. 07-052616 describes that a porous sound absorbing member is movably disposed in a cavity surrounded by an inner peripheral surface of a tire and an outer peripheral surface of a rim. However, if the sound absorbing member is disposed so as to be movable, the sound absorbing member repeatedly collides with the tire or the rim during traveling, so that the soundproofing effect is quickly lost due to wear deformation of the sound absorbing member. Therefore, it is desirable that the porous sound absorbing member is fixed to the tire or rim.
一方、走行時における路面との摩擦熱がタイヤに蓄熱し、タイヤが熱老化するという不具合がある。そして内周表面に多孔質の吸音部材が常時接触しているタイヤの場合には、多孔質の吸音部材は断熱機能をも備えてしまうために、タイヤの蓄熱がさらに促進されるという不具合がある。この点から見れば、吸音部材をタイヤ内に移動可能に配設するのが有利である。 On the other hand, there is a problem that frictional heat with the road surface during traveling is stored in the tire and the tire heat ages. And in the case of a tire in which a porous sound absorbing member is always in contact with the inner peripheral surface, the porous sound absorbing member also has a heat insulating function, so that there is a problem that heat storage of the tire is further promoted. . From this point of view, it is advantageous to dispose the sound absorbing member in the tire.
例えば特開2002−240507号公報には、多孔質で球状の吸音部材をタイヤの内周面とリムの外周面とで囲まれた空洞内に移動可能に配設することが記載され、これによりタイヤトレッド部の放熱性が向上することが記載されている。 For example, JP-A-2002-240507 describes that a porous and spherical sound absorbing member is movably disposed in a cavity surrounded by an inner peripheral surface of a tire and an outer peripheral surface of a rim. It is described that the heat dissipation of the tire tread portion is improved.
しかしながら特開2002−240507号公報には、球状の吸音部材の大きさ及び数によってはタイヤとの接触面積が増大して放熱性が低下することが記載されている。したがって吸音部材の大きさ及び数には限界があり、所定の吸音特性が得られない場合がある。すなわち放熱性を重視すると吸音性が低下し、吸音性を重視すると放熱性が低下するという背反事象が問題となっている。
本発明はこのような事情に鑑みてなされたものであり、吸音部材をもつ防音タイヤにおいて、十分な吸音特性をもちつつ放熱性も向上させ、タイヤ本体の熱老化を抑制することを目的とする。 The present invention has been made in view of such circumstances, and in a soundproof tire having a sound absorbing member, the object of the present invention is to improve heat dissipation while suppressing sound aging of the tire body while having sufficient sound absorbing characteristics. .
上記課題を解決する本発明の防音タイヤの特徴は、断面略Ｕ字形状のタイヤ本体と、タイヤ本体の内周面とリムの外周面とで形成されるリング状空間内でタイヤ本体の内周面に接した状態で配設された弾性を有する多孔質の吸音部材とよりなる防音タイヤであって、
吸音部材は発泡ウレタン樹脂からなり、吸音部材には発泡ウレタン樹脂 100重量部に対して熱伝導材が30〜 140重量部混合されていることにある。
The soundproof tire of the present invention that solves the above problems is characterized in that the inner periphery of the tire body in a ring-shaped space formed by the tire body having a substantially U-shaped cross section, the inner peripheral surface of the tire body and the outer peripheral surface of the rim A soundproof tire composed of a porous sound-absorbing member having elasticity arranged in contact with a surface ,
The sound absorbing member is made of a foamed urethane resin, and the heat absorbing material is mixed with 30 to 140 parts by weight of the heat absorbing material with respect to 100 parts by weight of the foamed urethane resin .
また吸音部材は表面に複数の突起をもち、タイヤ本体の内周表面に複数の突起を介して接合されていることが望ましい。 The sound absorbing member preferably has a plurality of protrusions on the surface and is joined to the inner peripheral surface of the tire body via the plurality of protrusions.
さらに、熱伝導材は粉末であることが望ましい。 Furthermore, it is desirable that the heat conducting material is a powder.
本発明の防音タイヤによれば、騒音を低減できるとともに、タイヤ本体の熱老化を防止することができる。 According to the soundproof tire of the present invention, noise can be reduced and thermal aging of the tire body can be prevented.
本発明の防音タイヤでは、タイヤ本体の内周面とリムの外周面とで形成されるリング状空間内でタイヤ本体の内周面に接した状態で配設された吸音部材に、熱伝導材が混合されている。この吸音部材は多孔質であり、孔の内部に存在する空気によって断熱性が高いため、タイヤ本体の熱の伝導性が低い。そこで吸音部材に熱伝導材を含むことで、走行時における路面との摩擦によるタイヤの発熱は、熱伝導材を含む吸音部材を介してタイヤ本体の内周面とリムの外周面とで形成されるリング状の内部空間内に放熱され、リムを伝わって排熱されるので、タイヤ本体の熱老化を抑制することができる。 In the soundproof tire of the present invention, the heat-conducting material is disposed on the sound absorbing member disposed in contact with the inner peripheral surface of the tire body in a ring-shaped space formed by the inner peripheral surface of the tire main body and the outer peripheral surface of the rim. Are mixed. Since this sound absorbing member is porous and has high heat insulating properties due to the air present in the holes, the heat conductivity of the tire body is low. Therefore, by including a heat conductive material in the sound absorbing member, heat generation of the tire due to friction with the road surface during traveling is formed by the inner peripheral surface of the tire body and the outer peripheral surface of the rim via the sound absorbing member including the heat conductive material. Since heat is dissipated in the ring-shaped inner space and exhausted through the rim, heat aging of the tire body can be suppressed.
タイヤ本体は従来用いられているものをそのまま用いることができる。例えば、ブタジエンゴム（ＢＲ）、スチレン−ブタジエンゴム（ＳＢＲ）、天然ゴム（ＮＲ）など、従来と同様の材料から従来と同様の断面略Ｕ字形状に形成することができる。もちろん各種繊維、カーボンブラック，シリカ，硫酸バリウムなどの充填材を従来と同様にゴム中に添加することもできる。ビードコア、ボディプライなどを埋設することができることももちろんである。 Conventional tire bodies can be used as they are. For example, it can be formed from a material similar to the conventional material, such as butadiene rubber (BR), styrene-butadiene rubber (SBR), natural rubber (NR), or the like, with a substantially U-shaped cross section similar to the conventional one. Of course, fillers such as various fibers, carbon black, silica, and barium sulfate can be added to the rubber as in the conventional case. Of course, bead cores and body plies can be buried.
本発明の特徴をなす吸音部材は、吸音特性が必要であること、軽量であること、コスト、吸音特性などの面から発泡ウレタン樹脂が用いられる。この吸音部材に含まれる熱伝導材は、少なくとも吸音部材の材質より熱伝導率が高ければよく、無機物あるいは金属の粉末、短繊維、ウィスカなどを用いることができる。場合によっては有機物を用いることも可能である。 The sound-absorbing member that characterizes the present invention uses foamed urethane resin from the viewpoints of sound absorption characteristics , light weight, cost, sound absorption characteristics, and the like. The heat conductive material contained in the sound absorbing member only needs to have at least a higher thermal conductivity than the material of the sound absorbing member, and inorganic or metal powder, short fibers, whiskers, or the like can be used. In some cases, organic substances can be used.
この熱伝導材は、粉末であることが望ましい。粉末とすることで、吸音部材の多孔質形状を維持することが容易であり、吸音特性を維持しつつ熱電導性を向上させることができる。例えば熱伝導シートなどに熱伝導材として利用されているアルミナ、炭酸カルシウムなどは、防音特性をほとんど阻害せず好ましい材料である。 This heat conductive material is preferably a powder. By using powder, it is easy to maintain the porous shape of the sound absorbing member, and the thermal conductivity can be improved while maintaining the sound absorbing characteristics. For example, alumina, calcium carbonate, and the like that are used as a heat conductive material in a heat conductive sheet or the like are preferable materials that hardly impair soundproofing properties.
熱伝導材の混合量は、多く混合すると熱伝導性は向上するものの吸音特性が低下したり製造が困難となったりする場合があるので、吸音部材と熱伝導材の材質に応じて決定される。吸音部材が発泡ウレタンである場合には、発泡樹脂 100重量部に対して熱伝導材が30〜 140重量部の範囲とし、70重量部程度とするのが特に好ましい。熱伝導材が30重量部未満では熱伝導性の向上を図ることが困難であり、 140重量部を超えると吸音部材の成形が困難となる。 The mixing amount of the heat conducting material is determined according to the material of the sound absorbing member and the heat conducting material, because although the heat conductivity improves, the sound absorbing property may be deteriorated or the production may be difficult. . When the sound absorbing member is urethane foam, the heat conductive material is in the range of 30 to 140 parts by weight with respect to 100 parts by weight of the foamed resin, and is preferably about 70 parts by weight. If the heat conductive material is less than 30 parts by weight, it is difficult to improve the thermal conductivity, and if it exceeds 140 parts by weight, it is difficult to mold the sound absorbing member.
吸音部材は、タイヤの内周表面に固定されている。特許文献２に記載のように、吸音部材を移動可能に配設したのでは、走行時に吸音部材がタイヤあるいはリムに衝突を繰り返すため、摩耗変形により吸音効果が早期に消失してしまう。またタイヤ本体からの熱伝導効率も低い。なお吸音部材の固定方法としては、接合による方法、機械的に固定する方法などを用いることができるが、部品点数の増加を防止するためには接合による方法が望ましい。 The sound absorbing member is fixed to the inner peripheral surface of the tire. As described in Patent Document 2, if the sound absorbing member is movably disposed, the sound absorbing member repeatedly collides with the tire or the rim during traveling, so that the sound absorbing effect disappears early due to wear deformation. Also, the heat conduction efficiency from the tire body is low. As a method for fixing the sound absorbing member, a joining method, a mechanical fixing method, or the like can be used. In order to prevent an increase in the number of parts, a joining method is desirable.
吸音部材は、タイヤ本体とリムとで形成されるリング状の内部空間内に沿うリング状とすることが望ましい。もし一部に吸音部材が存在しない部位があると、その部分でロードノイズを低減することが困難となるからである。 It is desirable that the sound absorbing member has a ring shape along a ring-shaped internal space formed by the tire body and the rim. This is because if there is a part where no sound absorbing member exists, it is difficult to reduce road noise at that part.
吸音部材は表面に複数の突起をもち、タイヤ本体の内周表面に複数の突起を介して接合されていることが望ましい。このように構成することで、タイヤ本体の内周表面と吸音部材の外周表面との間に、タイヤ本体の内部空間に連通する隙間を形成することができる。そして熱伝導材が混入された吸音部材は、突起によって放熱面積が増大するとともに、隙間を介して放射熱を内部空間に逃がすことができる。また吸音部材の断熱性による悪影響を回避できるので、タイヤ本体の放熱性がより向上する。 The sound absorbing member preferably has a plurality of protrusions on the surface and is joined to the inner peripheral surface of the tire body via the plurality of protrusions. By comprising in this way, the clearance gap connected to the internal space of a tire main body can be formed between the inner peripheral surface of a tire main body, and the outer peripheral surface of a sound absorption member. The sound absorbing member mixed with the heat conducting material can increase the heat radiation area by the protrusions and can release the radiant heat to the internal space through the gap. Moreover, since the bad influence by the heat insulation of a sound absorbing member can be avoided, the heat dissipation of a tire main body improves more.
突起を形成する場合、不連続の突起とすることが望ましい。これにより突起どうしの間を空気の流通路とすることができ、放熱性が一層向上する。また、吸音部材の表裏面を貫通し、上記隙間に連通する貫通孔を設けることも効果的であるが、吸音特性を阻害しない程度に設けることが必要である。 When forming protrusions, it is desirable to use discontinuous protrusions. As a result, a space between the protrusions can be used as an air flow path, and heat dissipation is further improved. It is also effective to provide a through-hole that penetrates the front and back surfaces of the sound-absorbing member and communicates with the gap, but it is necessary to provide the sound-absorbing characteristic so as not to be disturbed.
吸音部材を発泡ウレタン樹脂から形成する場合には、その連泡率を80〜95％とすることが好ましい。連泡率が80％未満では吸音特性の発現が困難となる。また連泡率が95％を超えると、吸音効果が高い周波数域が高周波数側へ移行し、目的とする低周波数域の騒音を低減することが困難となる。さらに、熱伝導材を含めた見掛け密度を0.05〜 0.2ｇ／cm3 とすることも好ましい。見掛け密度が 0.2ｇ／cm3 より大きいと吸音特性の発現が困難となり、見掛け密度が0.05ｇ／cm3 より小さくなると剛性に不足して走行時に変形が生じる場合がある。 When the sound-absorbing member is formed from a urethane foam resin, the open cell rate is preferably 80 to 95%. If the open cell rate is less than 80%, it is difficult to develop sound absorption characteristics. On the other hand, when the open bubble ratio exceeds 95%, the frequency range having a high sound absorption effect shifts to the high frequency side, and it becomes difficult to reduce the target noise in the low frequency range. Furthermore, it is also preferable that the apparent density including the heat conductive material is 0.05 to 0.2 g / cm 3 . Expression of apparent density of 0.2 g / cm 3 greater than the sound-absorbing characteristics becomes difficult, apparent density sometimes is deformed during travel missing becomes smaller the rigidity than 0.05 g / cm 3 results.
吸音部材をタイヤ本体に接合するには、接着剤を用いて接着する方法、タイヤ本体の内周面に吸音部材を一体発泡成形する方法などが例示される。接着あるいは一体発泡成形によってタイヤ本体に吸音部材を接合する方法を採用する場合には、タイヤ本体の内周表面に脱脂処理を施したり、あるいはタイヤ本体の内周表面にショットブラスト処理などの接合強度増大処理を施しておくことが望ましい。 In order to join the sound absorbing member to the tire body, a method of bonding using an adhesive, a method of integrally foaming the sound absorbing member on the inner peripheral surface of the tire body, and the like are exemplified. When adopting a method to join the sound absorbing member to the tire body by bonding or integral foam molding, the inner peripheral surface of the tire body is degreased, or the joining strength such as shot blasting is applied to the inner peripheral surface of the tire body It is desirable to perform an increase process.
以下、実施例により本発明を具体的に説明する。 Hereinafter, the present invention will be described specifically by way of examples.
（実施例１）
図１及び図２に本実施例の防音タイヤを示す。この防音タイヤは、ゴム製で断面略Ｕ字状に形成されたタイヤ本体１と、タイヤ本体１の接地面の裏面側の内周表面に接合された吸音部材２とから構成されている。この防音タイヤは、ゴム系接着剤を用いて、予め形成された吸音部材２を接着することで一体化されている。
(Example 1)
1 and 2 show a soundproof tire of this embodiment. The soundproof tire includes a tire body 1 made of rubber and having a substantially U-shaped cross section, and a sound absorbing member 2 joined to an inner peripheral surface on the back side of the ground contact surface of the tire body 1. This soundproof tire is integrated by adhering a previously formed sound absorbing member 2 using a rubber adhesive.
吸音部材２は、発泡ウレタン樹脂 100重量部に対して熱伝導材としてのアルミナ粉末（「AS−10」昭和電工（株）製）を 133.3重量部含有する複合樹脂材料から発泡成形により無端のリング状に形成され、見掛け密度0.07ｇ／cm3 、連泡率90％、厚さ10mmに形成されている。 The sound absorbing member 2 is an endless ring formed by foam molding from a composite resin material containing 133.3 parts by weight of alumina powder ("AS-10" manufactured by Showa Denko KK) as a heat conductive material for 100 parts by weight of urethane foam resin. The apparent density is 0.07 g / cm 3 , the open cell rate is 90%, and the thickness is 10 mm.
本実施例の防音タイヤによれば、走行時の路面との摩擦熱でタイヤ本体１が熱せられても、発泡ウレタン樹脂より熱伝導率が小さいアルミナ粉末が吸音部材２に含まれているため、タイヤ本体１の熱は吸音部材２を介してリムとの間に形成された内部空間に放熱され、さらにリムを介して外部へ放熱される。したがってタイヤ本体１の過熱を防止することができ、タイヤ本体１の熱老化を抑制することができる。 According to the soundproof tire of this embodiment, even if the tire body 1 is heated by frictional heat with the road surface during traveling, the sound absorbing member 2 contains alumina powder having a lower thermal conductivity than the urethane foam resin. The heat of the tire body 1 is radiated to the internal space formed between the rim and the rim via the sound absorbing member 2, and further radiated to the outside via the rim. Therefore, overheating of the tire body 1 can be prevented, and thermal aging of the tire body 1 can be suppressed.
（実施例２）
アルミナ粉末の含有量を、発泡ウレタン樹脂 100重量部に対して33.3重量部としたこと以外は実施例１と同様にして製造された吸音部材を用いたものを実施例２とする。
(Example 2)
Example 2 uses a sound absorbing member produced in the same manner as in Example 1 except that the content of the alumina powder is 33.3 parts by weight with respect to 100 parts by weight of the urethane foam resin.
（実施例３）
アルミナ粉末の含有量を、発泡ウレタン樹脂 100重量部に対して66.7重量部としたこと以外は実施例１と同様にして製造された吸音部材を用いたものを実施例３とする。
(Example 3)
Example 3 uses a sound-absorbing member produced in the same manner as in Example 1 except that the content of the alumina powder is 66.7 parts by weight with respect to 100 parts by weight of the urethane foam resin.
（比較例１）
アルミナ粉末を含まない発泡ウレタン樹脂から、実施例１と同様にして製造された吸音部材を用いたものを比較例１とする。
(Comparative Example 1)
A comparative example 1 is obtained by using a sound absorbing member manufactured in the same manner as in Example 1 from a urethane foam resin not containing alumina powder.
（比較例２）
アルミナ粉末の含有量を、発泡ウレタン樹脂 100重量部に対して 200重量部としたこと以外は実施例１と同様にして製造された吸音部材を用いたものを比較例２とする。
(Comparative Example 2)
A comparative example 2 is obtained by using a sound absorbing member manufactured in the same manner as in Example 1 except that the content of the alumina powder is 200 parts by weight with respect to 100 parts by weight of the urethane foam resin.
＜試験・評価＞
実施例１〜３及び比較例１〜２で用いられた吸音部材について、JIS A 1412に準じて熱伝導率を測定した。結果を表１及び図３に示す。なお表１には、各吸音部材の成形性と熱伝導性の評価も示している。
<Test and evaluation>
For the sound absorbing members used in Examples 1 to 3 and Comparative Examples 1 and 2, the thermal conductivity was measured according to JIS A 1412. The results are shown in Table 1 and FIG. Table 1 also shows evaluation of moldability and thermal conductivity of each sound absorbing member.
また実施例１及び比較例１で用いられた吸音部材について、垂直入射吸音率測定法（JIS A 1405）に従って各周波数の音の吸音率をそれぞれ測定した。結果を図４に示す。 In addition, regarding the sound absorbing members used in Example 1 and Comparative Example 1, the sound absorption coefficient of each frequency was measured according to the normal incident sound absorption coefficient measurement method (JIS A 1405). The results are shown in FIG.
表１及び図３より、アルミナの充填量が増すにつれて熱伝導率が増大していることがわかり、発泡ウレタン樹脂 100重量部に対してアルミナ粉末を30重量部以上混合するのが好ましいことが明らかである。しかしアルミナの充填量が 133.3重量部を超えると、成形性が悪化するので、発泡ウレタン樹脂 100重量部に対して 140重量部以下とするのが好ましい。 From Table 1 and FIG. 3, it can be seen that the thermal conductivity increases as the alumina filling amount increases, and it is clear that it is preferable to mix 30 parts by weight or more of alumina powder with respect to 100 parts by weight of urethane foam resin. It is. However, if the alumina filling amount exceeds 133.3 parts by weight, the moldability deteriorates. Therefore, the amount is preferably 140 parts by weight or less with respect to 100 parts by weight of the urethane foam resin.
また図４より、実施例１で用いた吸音部材２は比較例１で用いた吸音部材より僅かに吸音率が低いだけであることがわかる。この差はアルミナ粉末の有無に起因し、実施例１では 133.3重量部の添加量でこの程度であるので、特に望ましい70重量部程度の添加量とすれば、吸音率はさらに比較例１に近くなることが明らかである。また図４における吸音率の差も特に問題が生じるレベルではなく、アルミナ粉末の添加は吸音特性にほとんど影響を及ぼさない。 Further, FIG. 4 shows that the sound absorbing member 2 used in Example 1 has a slightly lower sound absorption rate than the sound absorbing member used in Comparative Example 1. This difference is due to the presence or absence of alumina powder. In Example 1, the added amount is 133.3 parts by weight, which is about this level. If the particularly desirable added amount is about 70 parts by weight, the sound absorption rate is closer to that of Comparative Example 1. It is clear that Also, the difference in the sound absorption coefficient in FIG. 4 is not at a level that causes a particular problem, and the addition of alumina powder hardly affects the sound absorption characteristics.
（実施例４）
図５に本実施例の防音タイヤを、図６にこの防音タイヤに用いた吸音部材の要部を示す。吸音部材２は、長尺板状の基部20と、基部20の一表面に形成された複数の突起21とから構成され、発泡ウレタン樹脂 100重量部に対して実施例１と同様のアルミナ粉末を66.7重量部含有する複合樹脂材料から発泡成形により形成されている。アルミナ粉末は、基部20及び突起21に均一に含まれている。
Example 4
FIG. 5 shows a soundproof tire according to the present embodiment, and FIG. 6 shows a main part of a sound absorbing member used in the soundproof tire. The sound absorbing member 2 is composed of a long plate-like base portion 20 and a plurality of protrusions 21 formed on one surface of the base portion 20, and the same alumina powder as in Example 1 is applied to 100 parts by weight of urethane foam resin. It is formed by foam molding from a composite resin material containing 66.7 parts by weight. The alumina powder is uniformly contained in the base 20 and the protrusions 21.
この吸音部材２は、突起21がタイヤ本体１の接地面の裏面側に対向するようにリング状に配置され、ゴム系接着剤を用いて突起21の先端面がタイヤ本体１の内周表面に接合されている。 The sound absorbing member 2 is arranged in a ring shape so that the protrusion 21 faces the back side of the ground contact surface of the tire body 1, and the tip surface of the protrusion 21 is formed on the inner peripheral surface of the tire body 1 using a rubber adhesive. It is joined.
本実施例の防音タイヤによれば、基部20及び突起21に熱伝導材であるアルミナ粉末が含まれているため、タイヤ本体１の熱の一部は突起21から基部20に伝達され、基部20からリムとの間に形成された内部空間に放熱され、さらにリムを介して外部へ放熱される。またタイヤ本体１と基部20との間には突起21の高さ分の隙間10が形成され、隙間10は突起21どうしの間で内部空間と連通しているので、タイヤ本体１の熱の大部分は隙間10から内部空間へ直接放熱される。 According to the soundproof tire of this embodiment, since the base 20 and the protrusion 21 contain alumina powder as a heat conductive material, a part of the heat of the tire body 1 is transmitted from the protrusion 21 to the base 20 and the base 20 The heat is radiated to the internal space formed between the rim and the rim, and further radiated to the outside through the rim. Further, a gap 10 corresponding to the height of the protrusion 21 is formed between the tire body 1 and the base 20, and the gap 10 communicates with the internal space between the protrusions 21. The part is directly radiated from the gap 10 to the internal space.
したがって突起21によって放熱面積がきわめて大きいので、タイヤ本体１の熱を効率よく放熱することができる。さらに、隙間10によって吸音部材２の断熱性による悪影響を回避することができる。 Therefore, since the heat radiation area is extremely large by the protrusion 21, the heat of the tire body 1 can be efficiently radiated. Further, the gap 10 can avoid an adverse effect due to the heat insulation of the sound absorbing member 2.
したがって本実施例の防音タイヤによれば、実施例１と同様の吸音作用が奏されるとともに、実施例１より放熱性がさらに向上するので、タイヤ本体１の熱老化をさらに抑制することができる。 Therefore, according to the soundproof tire of the present embodiment, the sound absorbing action similar to that of the first embodiment is exhibited and the heat dissipation is further improved as compared with the first embodiment, so that the heat aging of the tire body 1 can be further suppressed. .
本発明の防音タイヤは、自動車、産業車両、航空機などのタイヤに利用することができ、特に高速走行用、急制動用あるいは山岳地用など、負荷が大きく熱が蓄積されやすい用途に最適である。 The soundproof tire of the present invention can be used for tires of automobiles, industrial vehicles, aircrafts, etc., and is particularly suitable for applications where load is large and heat is easily accumulated, such as for high-speed running, sudden braking, or mountainous areas. .
１：タイヤ本体 ２：吸音部材 10：隙間
20：基部 21：突起
1: Tire body 2: Sound absorbing member 10: Clearance
20: Base 21: Protrusion
Claims (3)
該吸音部材は発泡ウレタン樹脂からなり、該吸音部材には該発泡ウレタン樹脂 100重量部に対して熱伝導材が30〜 140重量部混合されていることを特徴とする防音タイヤ。 Elasticity disposed in contact with the inner peripheral surface of the tire body in a ring-shaped space formed by the tire main body having a substantially U-shaped cross section and the inner peripheral surface of the tire main body and the outer peripheral surface of the rim. A soundproof tire comprising a porous sound-absorbing member ,
The sound absorbing member is made of a foamed urethane resin, and the sound absorbing member has 30 to 140 parts by weight of a heat conductive material mixed with 100 parts by weight of the urethane foam resin .
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| JP2003340710A JP4113084B2 (en) | 2003-09-30 | 2003-09-30 | Soundproof tire |
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| JP2003340710A JP4113084B2 (en) | 2003-09-30 | 2003-09-30 | Soundproof tire |
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| JP4113084B2 true JP4113084B2 (en) | 2008-07-02 |
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| US7694707B2 (en) * | 2005-12-20 | 2010-04-13 | The Goodyear Tire & Rubber Company | Tire with integral foamed noise damper |
| JP4906527B2 (en) * | 2006-01-31 | 2012-03-28 | 東海ゴム工業株式会社 | Sound absorber and sound absorbing structure |
| CN101547798B (en) * | 2006-11-21 | 2012-11-21 | 株式会社普利司通 | Tire/rim assembly and sponge member for use therein |
| FR2915428B1 (en) * | 2007-04-26 | 2011-04-29 | Michelin Soc Tech | PNEUMATIC WITH REDUCED BEARING NOISE |
| FR2915427B1 (en) * | 2007-04-26 | 2011-04-22 | Michelin Soc Tech | PNEUMATIC COMPRISING AN ALVEOLAR LAYER |
| US8734669B2 (en) | 2007-08-28 | 2014-05-27 | Tokai Rubber Industries, Ltd. | Urethane foam molded article, manufacturing method thereof, and magnetic induction foam molding apparatus |
| JP5347555B2 (en) * | 2008-05-09 | 2013-11-20 | 横浜ゴム株式会社 | Tire noise reduction device and pneumatic tire equipped with the same |
| DE202008009008U1 (en) * | 2008-07-03 | 2008-09-04 | Recticel N.V. | vehicle tires |
| KR101016264B1 (en) | 2008-10-28 | 2011-02-25 | 한국타이어 주식회사 | Noise absorber for reducing tire cavity noise and methode thereof |
| DE202010005400U1 (en) | 2010-05-07 | 2010-07-15 | Recticel N.V. | Elastic vehicle tire |
| WO2015198996A1 (en) * | 2014-06-24 | 2015-12-30 | 横浜ゴム株式会社 | Tyre noise reduction device and pneumatic tyre |
| JP6428046B2 (en) * | 2014-08-22 | 2018-11-28 | 横浜ゴム株式会社 | Noise reduction device and pneumatic tire provided with the same |
| JP6432211B2 (en) * | 2014-08-22 | 2018-12-05 | 横浜ゴム株式会社 | Noise reduction device and pneumatic tire provided with the same |
| US10632790B2 (en) | 2014-09-12 | 2020-04-28 | Bridgestone Corporation | Pneumatic tire |
| US10919345B2 (en) | 2014-10-30 | 2021-02-16 | Acoustic Innovations Co., Ltd. | Vibration suppression tire |
| US20160318340A1 (en) * | 2015-04-30 | 2016-11-03 | The Goodyear Tire & Rubber Company | Provision of thermal conductivity for a tire containing a cast polyurethane component |
| DE102015210039A1 (en) * | 2015-06-01 | 2016-12-01 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| DE102015213496A1 (en) * | 2015-07-17 | 2017-01-19 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| DE102015215738A1 (en) * | 2015-08-18 | 2017-02-23 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| DE102015215739A1 (en) | 2015-08-18 | 2017-02-23 | Continental Reifen Deutschland Gmbh | Vehicle tires |
| EP3517317A4 (en) * | 2016-10-18 | 2020-07-01 | Sumitomo Rubber Industries, Ltd. | Pneumatic tire |
| JP2019089410A (en) * | 2017-11-13 | 2019-06-13 | 株式会社ブリヂストン | tire |
| CN111565939A (en) * | 2017-12-18 | 2020-08-21 | 株式会社普利司通 | Tire and method of fixing porous body |
| IT201900001641A1 (en) * | 2019-02-05 | 2020-08-05 | Bridgestone Europe Nv Sa | TIRE INCLUDING A SEALANT LAYER AND A SOUND ABSORBING ELEMENT |
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| JPH07115563B2 (en) * | 1986-12-19 | 1995-12-13 | 株式会社ブリヂストン | Pneumatic tire with low noise and manufacturing method thereof |
| JPS63291708A (en) * | 1987-05-26 | 1988-11-29 | Honda Motor Co Ltd | Pneumatic tire |
| JP2648332B2 (en) * | 1988-04-01 | 1997-08-27 | 株式会社ブリヂストン | Method for manufacturing pneumatic tire having sound absorbing layer |
| JPH0986114A (en) * | 1995-09-28 | 1997-03-31 | Tokai Rubber Ind Ltd | Rubber composition for wheel acoustic material |
| WO2000078562A1 (en) * | 1999-06-21 | 2000-12-28 | Shishiai-Kabushikigaisha | Low-noise tire |
| JP3621899B2 (en) * | 2001-08-28 | 2005-02-16 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
| JP3622957B2 (en) * | 2001-08-02 | 2005-02-23 | 住友ゴム工業株式会社 | Pneumatic tire and rim assembly |
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