JP2020006720A - Pneumatic tire - Google Patents

Pneumatic tire Download PDF

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JP2020006720A
JP2020006720A JP2018126820A JP2018126820A JP2020006720A JP 2020006720 A JP2020006720 A JP 2020006720A JP 2018126820 A JP2018126820 A JP 2018126820A JP 2018126820 A JP2018126820 A JP 2018126820A JP 2020006720 A JP2020006720 A JP 2020006720A
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tire
sound absorbing
absorbing member
vibration damping
damping member
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JP7241481B2 (en
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一泰 榊原
Kazuyasu Sakakibara
一泰 榊原
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
Toyo Tire Corp
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Abstract

To provide a pneumatic tire that can suppress cavity resonance sound and improve productivity.SOLUTION: A pneumatic tire 1 includes: an acoustic absorption member 10 formed of sponge attached to a tire inner surface 1a and extending in a tire circumferential direction; and a vibration control member 20 formed of a rubber disposed between the tire inner surface 1a and the acoustic absorption member 10 and extending in the tire circumferential direction.SELECTED DRAWING: Figure 1

Description

本発明は、空気入りタイヤに関する。   The present invention relates to a pneumatic tire.

車両が荒れた路面を走行するときや路面の継ぎ目を通過するときなどに生じるタイヤ接地面からの振動によってタイヤ内部の空気による空洞共鳴音が発生することが知られている。空洞共鳴音は、車室内の騒音の原因となることから、空洞共鳴音を抑制することが行われている。   It is known that vibrations from a tire contact surface generated when a vehicle travels on a rough road surface or when passing a seam of a road surface generate cavity resonance sound due to air inside the tire. Since the cavity resonance noise causes noise in the vehicle interior, the cavity resonance sound is suppressed.

例えば特許文献１には、板状部材に複数の貫通孔とタイヤ周方向に延びる複数のスリットとを形成すると共に複数のスリットにタイヤ幅方向に延びる複数の円筒状の支持部材を挿通した後に、スリットに支持部材が挿通された板状部材をトレッド部のタイヤ内面に取り付けて、空洞共鳴音を抑制するようにした空気入りタイヤが開示されている。   For example, in Patent Literature 1, after a plurality of through holes and a plurality of slits extending in the tire circumferential direction are formed in a plate-shaped member and a plurality of cylindrical support members extending in the tire width direction are inserted into the plurality of slits, A pneumatic tire is disclosed in which a plate-like member having a support member inserted through a slit is attached to the inner surface of a tread portion of a tire to suppress cavity resonance.

特開２０１７−２０２７９０号公報JP 2017-202790A

しかしながら、前記特許文献１に記載のものは、板状部材に複数の貫通孔や複数のスリットを形成すると共にスリットに複数の支持部材を挿通させ、その後に板状部材をトレッド部のタイヤ内面に取り付けるものであり、タイヤ製造時の生産性の低下を引き起こし得る。   However, the one described in Patent Document 1 has a plurality of through holes and a plurality of slits formed in a plate-shaped member, and a plurality of support members are inserted through the slits. Thereafter, the plate-shaped member is inserted into the tire inner surface of the tread portion. This is to be attached, and may cause a decrease in productivity during tire production.

そこで、本発明は、空洞共鳴音を抑制すると共に生産性の向上を図ることができる空気入りタイヤを提供することを課題とする。   Therefore, an object of the present invention is to provide a pneumatic tire capable of suppressing cavity resonance sound and improving productivity.

本発明は、タイヤ内面に取り付けられてタイヤ周方向に延びるスポンジからなる吸音部材と、前記タイヤ内面と前記吸音部材との間に配置されてタイヤ周方向に延びるゴムからなる制振部材とを備えている空気入りタイヤを提供する。   The present invention includes a sound absorbing member made of a sponge attached to the tire inner surface and extending in the tire circumferential direction, and a vibration damping member made of rubber extending in the tire circumferential direction and disposed between the tire inner surface and the sound absorbing member. To provide pneumatic tires.

本発明によれば、タイヤ接地面からの振動がタイヤ内面と吸音部材との間に配置されたゴムからなる制振部材によって低減され、タイヤ接地面からの振動によって生じるタイヤ内部の空気の振動による音が低減される。そして、この低減されたタイヤ内部の空気の振動による音がタイヤ内面に制振部材を介して取り付けられたスポンジからなる吸音部材を通過するときに低減されるので、タイヤ接地面からの振動によって生じるタイヤ内部の空気の振動による音が共鳴してタイヤ内部に発生する空洞共鳴音を抑制することができる。   According to the present invention, the vibration from the tire contact surface is reduced by the vibration damping member made of rubber disposed between the tire inner surface and the sound absorbing member, and is caused by the vibration of the air inside the tire caused by the vibration from the tire contact surface. Sound is reduced. The reduced sound due to the vibration of the air inside the tire is reduced when the sound passes through a sound absorbing member formed of a sponge attached to the tire inner surface via a vibration damping member, and thus is caused by the vibration from the tire contact surface. It is possible to suppress the cavity resonance sound generated inside the tire due to the resonance of the sound due to the vibration of the air inside the tire.

また、タイヤ製造時に、タイヤ内面にゴムからなる制振部材とスポンジからなる吸音部材とを取り付けるだけで、空洞共鳴音を抑制することができるので、比較的容易に製造することができ、生産性の向上を図ることができる。   Also, at the time of tire production, cavity resonance can be suppressed by simply attaching a vibration damping member made of rubber and a sound absorbing member made of sponge to the inner surface of the tire. Can be improved.

前記制振部材は、タイヤ周方向全体に亘って配置されていることが好ましい。   It is preferable that the vibration damping member is disposed over the entire tire circumferential direction.

本構成によれば、タイヤ周方向の一部に制振部材が配置される場合に比して、空洞共鳴音を有効に抑制することができる。   According to this configuration, it is possible to effectively suppress the cavity resonance sound as compared with the case where the vibration damping member is arranged in a part in the tire circumferential direction.

前記吸音部材は、タイヤ周方向全体に亘って取り付けられていることが好ましい。   It is preferable that the sound absorbing member is attached over the entire tire circumferential direction.

本構成によれば、タイヤ周方向の一部に吸音部材が取り付けられる場合に比して、空洞共鳴音を有効に抑制することができる。   According to this configuration, the cavity resonance can be effectively suppressed as compared with the case where the sound absorbing member is attached to a part in the tire circumferential direction.

前記制振部材は、タイヤ内面を構成するインナーライナのゴムより損失正接（ｔａｎδ）が大きいゴムから形成されていることが好ましい。   It is preferable that the vibration damping member is formed of rubber having a larger loss tangent (tan δ) than the rubber of the inner liner forming the inner surface of the tire.

本構成によれば、インナーライナのゴムより損失正接が大きいゴムから形成される制振部材を用いることで、制振部材によって振動エネルギを有効に吸収することができるので、制振部材によってタイヤ接地面からの振動を有効に低減させることができ、空洞共鳴音を有効に抑制することができる。   According to this configuration, the vibration energy can be effectively absorbed by the vibration damping member by using the vibration damping member formed of rubber having a larger loss tangent than the rubber of the inner liner. Vibration from the ground can be effectively reduced, and cavity resonance can be effectively suppressed.

前記制振部材は、タイヤ径方向内面にタイヤ径方向外側に窪む凹部を備え、制振部材と吸音部材との間に、凹部の内面と吸音部材のタイヤ径方向外面とによって区画される空洞部が形成されていてもよい。   The vibration damping member includes a concave portion depressed outward in the tire radial direction on an inner surface in the tire radial direction, and a cavity defined between the damping member and the sound absorbing member by the inner surface of the concave portion and the tire radial outer surface of the sound absorbing member. A part may be formed.

本構成によれば、制振部材と吸音部材との間に形成される空洞部によって、タイヤ接地面からの振動によって生じるタイヤ内部の空気の振動による音が低減されるので、空洞共鳴音をさらに抑制することができる。   According to this configuration, the cavity formed between the vibration damping member and the sound absorbing member reduces the sound due to the vibration of the air inside the tire caused by the vibration from the tire contact surface, and further reduces the cavity resonance sound. Can be suppressed.

前記吸音部材は、タイヤ径方向内面にタイヤ周方向に離間して配置されてタイヤ径方向に内側に突出する突部を備えていてもよい。   The sound absorbing member may include a protrusion that is arranged on the inner surface in the tire radial direction so as to be spaced apart in the tire circumferential direction and protrudes inward in the tire radial direction.

本構成によれば、吸音部材のタイヤ径方向内面にタイヤ周方向に離間して配置された複数の突部によって吸音部材のタイヤ径方向内面に凹凸を形成することができるので、タイヤ接地面からの振動によって生じるタイヤ内部の音が放射状に伝播される際に、吸音部材のタイヤ径方向内面に形成される凹凸によって音を低減することができ、空洞共鳴音をさらに抑制することができる。   According to this configuration, it is possible to form irregularities on the tire radial direction inner surface of the sound absorbing member by a plurality of protrusions arranged apart in the tire circumferential direction on the tire radial direction inner surface of the sound absorbing member. When the sound inside the tire caused by the vibration of the tire is radially propagated, the sound can be reduced by the unevenness formed on the inner surface in the tire radial direction of the sound absorbing member, and the cavity resonance can be further suppressed.

本発明に係る空気入りタイヤによれば、空洞共鳴音を抑制すると共に生産性の向上を図ることができる。   ADVANTAGE OF THE INVENTION According to the pneumatic tire which concerns on this invention, while suppressing a cavity resonance sound, productivity improvement can be aimed at.

本発明の第１実施形態に係る空気入りタイヤの縦断面図である。It is a longitudinal section of a pneumatic tire concerning a 1st embodiment of the present invention. 本発明の第１実施形態に係る空気入りタイヤの横断面図である。It is a cross section of a pneumatic tire concerning a 1st embodiment of the present invention. 本発明の第２実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図である。It is a figure showing a sound absorption member and a vibration control member attached to a tire inside of a pneumatic tire concerning a 2nd embodiment of the present invention. 本発明の第３実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図である。It is a figure showing a sound absorption member and a vibration damping member attached to a tire inside of a pneumatic tire concerning a 3rd embodiment of the present invention. 図４のＹ５−Ｙ５線に沿った吸音部材及び制振部材の断面図である。FIG. 5 is a cross-sectional view of the sound absorbing member and the vibration damping member taken along line Y5-Y5 in FIG. 4. 本発明の第４実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図である。It is a figure showing a sound absorption member and a damping member attached to a tire inside of a pneumatic tire concerning a 4th embodiment of the present invention.

以下、本発明の実施形態について添付図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

図１は、本発明の第１実施形態に係る空気入りタイヤの縦断面図、図２は、本発明の第１実施形態に係る空気入りタイヤの横断面図である。図１及び図２に示すように、本発明の第１実施形態に係るゴム製の空気入りタイヤ１は、ホイール２に組み付けられてホイール２と共に車輪を構成するものであり、環状に形成されている。空気入りタイヤ１のタイヤ内面１ａとホイール２のリム部２ａの外面とによってタイヤ内部（内腔）８が円環状に形成されている。   FIG. 1 is a longitudinal sectional view of the pneumatic tire according to the first embodiment of the present invention, and FIG. 2 is a transverse sectional view of the pneumatic tire according to the first embodiment of the present invention. As shown in FIGS. 1 and 2, a rubber pneumatic tire 1 according to a first embodiment of the present invention is assembled to a wheel 2 to constitute a wheel together with the wheel 2, and is formed in an annular shape. I have. A tire inside (lumen) 8 is formed in an annular shape by the tire inner surface 1a of the pneumatic tire 1 and the outer surface of the rim portion 2a of the wheel 2.

空気入りタイヤ１は、図２に示すように、タイヤ径方向外側に位置して路面に接するトレッド部３と、タイヤ径方向内側に位置してホイール２のリム部２ａに組み付けられる両側のビード部４と、トレッド部３と両側のビード部４との間にそれぞれ位置してタイヤ径方向に延びる両側のサイドウォール部５とを備える。   As shown in FIG. 2, the pneumatic tire 1 has a tread portion 3 located on the outside in the tire radial direction and in contact with the road surface, and bead portions on both sides which are located on the radially inside and attached to the rim portion 2 a of the wheel 2. 4 and two sidewall portions 5 located between the tread portion 3 and both bead portions 4 and extending in the tire radial direction.

空気入りタイヤ１は、両側のビード部４間に図示しないカーカスが設けられると共に、前記カーカスのタイヤ内面側にタイヤ内面１ａを構成する図示しないインナーライナが設けられている。前記インナーライナは、空気圧を保持するためのものであり、空気の透過を防ぐゴムで形成されている。   In the pneumatic tire 1, a carcass (not shown) is provided between the bead portions 4 on both sides, and an inner liner (not shown) constituting the tire inner surface 1a is provided on the tire inner surface side of the carcass. The inner liner is for maintaining air pressure, and is formed of rubber that prevents air from permeating.

本実施形態では、空気入りタイヤ１のタイヤ内面１ａにタイヤ周方向に延びる吸音部材１０が取り付けられると共に、タイヤ内面１ａと吸音部材１０との間にタイヤ周方向に延びる制振部材２０が配置され、吸音部材１０は、制振部材２０を介してタイヤ内面１ａに取り付けられている。   In the present embodiment, a sound absorbing member 10 extending in the tire circumferential direction is attached to the tire inner surface 1a of the pneumatic tire 1, and a vibration damping member 20 extending in the tire circumferential direction is arranged between the tire inner surface 1a and the sound absorbing member 10. The sound absorbing member 10 is attached to the tire inner surface 1a via a vibration damping member 20.

吸音部材１０及び制振部材２０はそれぞれ、タイヤ周方向全体に亘ってタイヤ周方向に延びるように形成されている。制振部材２０は、空気入りタイヤ１のタイヤ内面１ａに、具体的にはトレッド部３、両側のビード部４及び両側のサイドウォール部５のタイヤ内面１ａにタイヤ周方向全体に亘って取り付けられている。吸音部材１０は、空気入りタイヤ１のタイヤ内面１ａに、具体的にはトレッド部３のタイヤ内面１ａにタイヤ周方向全体に亘って制振部材２０を介して取り付けられている。   Each of the sound absorbing member 10 and the vibration damping member 20 is formed to extend in the tire circumferential direction over the entire tire circumferential direction. The vibration damping member 20 is attached to the tire inner surface 1a of the pneumatic tire 1, specifically, to the tread portion 3, the bead portions 4 on both sides, and the tire inner surface 1a of both sidewall portions 5 over the entire tire circumferential direction. ing. The sound absorbing member 10 is attached to the tire inner surface 1 a of the pneumatic tire 1, specifically, to the tire inner surface 1 a of the tread portion 3 via a vibration damping member 20 over the entire tire circumferential direction.

吸音部材１０及び制振部材２０はそれぞれ好ましくは、タイヤ周方向全体に亘ってタイヤ周方向に延びるように形成されるが、タイヤ周方向の一部にタイヤ周方向に延びるように形成することも可能である。   The sound absorbing member 10 and the vibration damping member 20 are preferably formed so as to extend in the tire circumferential direction over the entire tire circumferential direction, but may be formed so as to extend in the tire circumferential direction at a part in the tire circumferential direction. It is possible.

吸音部材１０は、タイヤ周方向に延びるようにシート状に形成されている。吸音部材１０は、多孔質体であるスポンジから形成され、合成樹脂等を発泡させた連続気泡又は独立気泡を含むものである。スポンジからなる吸音部材１０は好ましくは、比重が０．０２１ｇ／ｃｍ３以上０．０２７ｇ／ｃｍ３以下のものが用いられる。吸音部材１０として、例えばポリウレタン系のスポンジを用いることができるが、種々のスポンジを用いることができる。吸音部材１０は、接着剤又は両面テープなどの適宜の接合手段を用いて制振部材２０に取り付けられる。 The sound absorbing member 10 is formed in a sheet shape so as to extend in the tire circumferential direction. The sound absorbing member 10 is formed of a sponge that is a porous body, and includes open cells or closed cells formed by foaming a synthetic resin or the like. Preferably, the sound absorbing member 10 made of a sponge has a specific gravity of 0.021 g / cm 3 or more and 0.027 g / cm 3 or less. As the sound absorbing member 10, for example, a polyurethane sponge can be used, but various sponges can be used. The sound absorbing member 10 is attached to the vibration damping member 20 using an appropriate bonding means such as an adhesive or a double-sided tape.

吸音部材１０は、空気入りタイヤ１のタイヤ幅方向最大幅であるタイヤ幅の３０％以上７０％以下のタイヤ幅方向長さを有するように形成されている。吸音部材１０のタイヤ幅方向長さをタイヤ幅の３０％より小さくすると空洞共鳴音の低減効果が小さくなる一方、タイヤ幅の７０％より大きくするとサイドウォール部５のタイヤ内面１ａに制振部材２０を介して取り付けられてタイヤ内面１ａから剥離するおそれがある。   The sound absorbing member 10 is formed to have a length in the tire width direction of 30% or more and 70% or less of the tire width, which is the maximum width of the pneumatic tire 1 in the tire width direction. When the length of the sound absorbing member 10 in the tire width direction is smaller than 30% of the tire width, the effect of reducing the cavity resonance sound is reduced. On the other hand, when the length is larger than 70% of the tire width, the vibration damping member 20 And may be separated from the tire inner surface 1a.

制振部材２０は、タイヤ接地面からタイヤ内部８に伝達する振動を抑制するものであり、タイヤ周方向に延びるようにシート状に形成されている。制振部材２０は、制振性能を有するゴムから形成されている。ゴムからなる制振部材２０は好ましくは、タイヤ内面１ａを構成するインナーライナのゴムより損失正接（ｔａｎδ）が大きいゴムから形成されるものが用いられる。損失正接（ｔａｎδ）は、貯蔵弾性率に対する損失弾性率の割合であり、損失正接＝損失弾性率／貯蔵弾性率で表される。   The vibration damping member 20 suppresses vibration transmitted from the tire contact surface to the inside 8 of the tire, and is formed in a sheet shape so as to extend in the tire circumferential direction. The damping member 20 is made of rubber having damping performance. Preferably, the rubber damping member 20 is formed of rubber having a larger loss tangent (tan δ) than the rubber of the inner liner that forms the tire inner surface 1a. The loss tangent (tan δ) is the ratio of the loss elastic modulus to the storage elastic modulus, and is expressed by loss tangent = loss elastic modulus / storage elastic modulus.

制振部材２０として、例えば損失正接が０．５〜０．９である天然ゴム系のゴムを用い、インナーライナとして、例えば損失正接が０．１〜０．４であるブチル系のゴムを用い、制振部材２０は、インナーライナのゴムより損失正接が大きいものが用いられる。制振部材２０及びインナーライナとして共にブチル系のゴムを用いることも可能であるが、かかる場合においても、制振部材２０は、インナーライナのゴムより損失正接が大きいものが用いられる。制振部材２０は、タイヤ１が加硫成形されるときにタイヤ１と共に加硫成形されてタイヤ内面１ａに取り付けられる。   For example, a natural rubber rubber having a loss tangent of 0.5 to 0.9 is used as the vibration damping member 20, and a butyl rubber having a loss tangent of 0.1 to 0.4 is used as the inner liner. As the vibration damping member 20, a member having a larger loss tangent than the rubber of the inner liner is used. It is also possible to use butyl rubber for both the damping member 20 and the inner liner, but in such a case, a damping member 20 having a larger loss tangent than the rubber of the inner liner is used. The vibration damping member 20 is vulcanized and formed together with the tire 1 when the tire 1 is vulcanized and attached to the tire inner surface 1a.

このようにして構成される空気入りタイヤ１を製造する際には、金型内で加硫成形してタイヤ１を製造するときにタイヤ内面１ａを構成するインナーライナに制振部材２０を重ね合わせて加硫成形してタイヤ内面１ａに制振部材２０が取り付けられたタイヤ１が製造されると共にスポンジからなる吸音部材１０が製造される。そして、加硫成形されたタイヤ１と共にタイヤ内面１ａに取り付けられた制振部材２０に吸音部材１０が取り付けられて空気入りタイヤが製造される。   When manufacturing the pneumatic tire 1 configured as described above, when the tire 1 is manufactured by vulcanization molding in a mold, the damping member 20 is superimposed on the inner liner constituting the tire inner surface 1a. The tire 1 in which the vibration damping member 20 is attached to the tire inner surface 1a by the vulcanization molding is manufactured, and the sound absorbing member 10 made of a sponge is manufactured. Then, the sound absorbing member 10 is attached to the vibration damping member 20 attached to the tire inner surface 1a together with the vulcanized tire 1 to manufacture a pneumatic tire.

このように、本実施形態に係る空気入りタイヤ１は、タイヤ内面１ａに取り付けられてタイヤ周方向に延びるスポンジからなる吸音部材１０と、タイヤ内面１ａと吸音部材１０との間に配置されてタイヤ周方向に延びるゴムからなる制振部材２０とを備えている。   As described above, the pneumatic tire 1 according to the present embodiment includes a sound absorbing member 10 formed of a sponge attached to the tire inner surface 1a and extending in the tire circumferential direction, and a tire arranged between the tire inner surface 1a and the sound absorbing member 10. A vibration damping member 20 made of rubber extending in a circumferential direction.

これにより、タイヤ接地面からの振動がタイヤ内面１ａと吸音部材１０との間に配置されたゴムからなる制振部材２０によって低減され、タイヤ接地面からの振動によって生じるタイヤ内部８の空気の振動による音が低減される。そして、この低減されたタイヤ内部８の空気の振動による音がタイヤ内面１ａに制振部材２０を介して取り付けられたスポンジからなる吸音部材１０を通過するときに低減されるので、タイヤ接地面からの振動によって生じるタイヤ内部８の空気の振動による音が共鳴してタイヤ内部８に発生する空洞共鳴音を抑制することができる。   As a result, the vibration from the tire contact surface is reduced by the vibration damping member 20 made of rubber disposed between the tire inner surface 1a and the sound absorbing member 10, and the vibration of the air inside the tire 8 caused by the vibration from the tire contact surface Is reduced. The reduced sound due to the vibration of the air inside the tire 8 is reduced when the sound passes through the sound absorbing member 10 formed of a sponge attached to the tire inner surface 1a via the vibration damping member 20. The sound due to the vibration of the air inside the tire inside 8 caused by the vibration of the tire resonates, and the cavity resonance sound generated inside the tire inside 8 can be suppressed.

また、タイヤ製造時に、タイヤ内面１ａにゴムからなる制振部材２０とスポンジからなる吸音部材１０とを取り付けるだけで、空洞共鳴音を抑制することができるので、比較的容易に製造することができ、生産性の向上を図ることができる。   Further, at the time of manufacturing the tire, cavity resonance can be suppressed only by attaching the vibration damping member 20 made of rubber and the sound absorbing member 10 made of sponge to the tire inner surface 1a, so that the tire can be manufactured relatively easily. Thus, productivity can be improved.

タイヤ内部８の空気の振動による音が放射状に伝播される際、リム部２ａによって一部反射され、タイヤ接地面からの振動によって生じるタイヤ内部８の空気の振動による音は、タイヤ接地面から放射状に拡がる音の他、リム部２ａから反射される音も含まれる。そして、タイヤ接地面からの振動によってタイヤ内部８の空気の振動による音が放射状に伝播される際にも、吸音部材１０によって音が低減させることができ、空洞共鳴音を抑制することができる。   When the sound due to the vibration of the air inside the tire 8 propagates radially, the sound is partially reflected by the rim portion 2a, and the sound due to the vibration of the air inside the tire 8 caused by the vibration from the tire contact surface is radially transmitted from the tire contact surface. And the sound reflected from the rim 2a. And even when the sound due to the vibration of the air inside the tire 8 is radially propagated by the vibration from the tire grounding surface, the sound can be reduced by the sound absorbing member 10 and the cavity resonance sound can be suppressed.

また、制振部材２０は、タイヤ周方向全体に亘って配置されることにより、タイヤ周方向の一部に制振部材２０が配置される場合に比して、空洞共鳴音を有効に抑制することができる。   In addition, the vibration suppression member 20 is disposed over the entire tire circumferential direction, so that the cavity resonance is effectively suppressed as compared with the case where the vibration suppression member 20 is disposed partially in the tire circumferential direction. be able to.

また、吸音部材１０は、タイヤ周方向全体に亘って取り付けられることにより、タイヤ周方向の一部に吸音部材１０が取り付けられる場合に比して、空洞共鳴音を有効に抑制することができる。   Further, since the sound absorbing member 10 is attached over the entire tire circumferential direction, the cavity resonance can be effectively suppressed as compared with the case where the sound absorbing member 10 is attached to a part of the tire circumferential direction.

また、制振部材２０は、タイヤ内面１ａを構成するインナーライナのゴムより損失正接が大きいゴムから形成されている。これにより、インナーライナのゴムより損失正接が大きいゴムから形成される制振部材２０を用いることで、制振部材２０によって振動エネルギを有効に吸収することができるので、制振部材２０によってタイヤ接地面からの振動を有効に低減させることができ、空洞共鳴音を有効に抑制することができる。   Further, the vibration damping member 20 is formed of rubber having a larger loss tangent than the rubber of the inner liner constituting the tire inner surface 1a. By using the damping member 20 made of rubber having a larger loss tangent than the rubber of the inner liner, the vibration energy can be effectively absorbed by the damping member 20. Vibration from the ground can be effectively reduced, and cavity resonance can be effectively suppressed.

図３は、本発明の第２実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図である。図３では、吸音部材及び制振部材を平面状に展開した状態で示している。第２実施形態に係る空気入りタイヤは、第１実施形態に係る空気入りタイヤと、制振部材の形状が異なること以外は同様であるので、同様の構成については説明を省略する。   FIG. 3 is a diagram showing a sound absorbing member and a vibration damping member attached to the inner surface of the pneumatic tire according to the second embodiment of the present invention. FIG. 3 shows the sound absorbing member and the vibration damping member in a state where they are developed in a plane. The pneumatic tire according to the second embodiment is the same as the pneumatic tire according to the first embodiment except that the shape of the damping member is different, and a description of the same configuration will be omitted.

第２実施形態に係る空気入りタイヤについても、タイヤ内面にタイヤ周方向に延びる吸音部材１０が取り付けられると共に、タイヤ内面と吸音部材１０との間にタイヤ周方向に延びる制振部材３０が配置され、吸音部材１０は、制振部材３０を介してタイヤ内面に取り付けられる。   Also in the pneumatic tire according to the second embodiment, the sound absorbing member 10 extending in the tire circumferential direction is attached to the tire inner surface, and the vibration damping member 30 extending in the tire circumferential direction is disposed between the tire inner surface and the sound absorbing member 10. The sound absorbing member 10 is attached to the inner surface of the tire via the vibration damping member 30.

第１実施形態に係る空気入りタイヤ１では、制振部材２０は、トレッド部３、両側のビード部４及び両側のサイドウォール部５のタイヤ内面１ａに取り付けられているが、第２実施形態に係る空気入りタイヤでは、図３に示すように、制振部材３０は、トレッド部のタイヤ内面に吸音部材１０のタイヤ径方向外面全体にのみ取り付けられる。   In the pneumatic tire 1 according to the first embodiment, the damping member 20 is attached to the tire inner surface 1a of the tread portion 3, the bead portions 4 on both sides, and the sidewall portions 5 on both sides. In such a pneumatic tire, as shown in FIG. 3, the vibration damping member 30 is attached to the tire inner surface of the tread portion only on the entire tire radial outer surface in the tire radial direction.

本実施形態に係る空気入りタイヤについても、タイヤ内面に取り付けられたスポンジからなる吸音部材１０と、タイヤ内面と吸音部材１０との間に配置されたゴムからなる制振部材３０とが備えられることにより、空洞共鳴音を抑制すると共に生産性の向上を図ることができる。   The pneumatic tire according to the present embodiment also includes a sound absorbing member 10 made of sponge attached to the tire inner surface, and a vibration damping member 30 made of rubber disposed between the tire inner surface and the sound absorbing member 10. Thereby, the cavity resonance can be suppressed and the productivity can be improved.

図４は、本発明の第３実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図、図５は、図４のＹ５−Ｙ５線に沿った吸音部材及び制振部材の断面図である。図４では、吸音部材及び制振部材を平面状に展開すると共に分離した状態で示している。第３実施形態に係る空気入りタイヤは、第２実施形態に係る空気入りタイヤと、制振部材の形状が異なること以外は同様であるので、同様の構成については説明を省略する。   FIG. 4 is a view showing a sound absorbing member and a vibration damping member attached to the tire inner surface of the pneumatic tire according to the third embodiment of the present invention. FIG. 5 is a diagram showing the sound absorbing member and the vibration damping member taken along line Y5-Y5 in FIG. It is sectional drawing of a vibration member. In FIG. 4, the sound absorbing member and the vibration damping member are shown in a flat state and separated. The pneumatic tire according to the third embodiment is the same as the pneumatic tire according to the second embodiment except that the shape of the vibration damping member is different, and a description of the same configuration will be omitted.

第３実施形態に係る空気入りタイヤについても、タイヤ内面にタイヤ周方向に延びる吸音部材１０が取り付けられると共に、タイヤ内面と吸音部材１０との間にタイヤ周方向に延びる制振部材４０が配置され、吸音部材１０は、制振部材４０を介してタイヤ内面に取り付けられる。   Also in the pneumatic tire according to the third embodiment, the sound absorbing member 10 extending in the tire circumferential direction is attached to the tire inner surface, and the vibration damping member 40 extending in the tire circumferential direction is disposed between the tire inner surface and the sound absorbing member 10. The sound absorbing member 10 is mounted on the inner surface of the tire via a vibration damping member 40.

図４及び図５に示すように、第３実施形態に係る空気入りタイヤでは、制振部材４０は、トレッド部のタイヤ内面に吸音部材１０のタイヤ径方向外面全体にのみ取り付けられる。   As shown in FIGS. 4 and 5, in the pneumatic tire according to the third embodiment, the vibration damping member 40 is attached to the entire tire radially outer surface of the sound absorbing member 10 on the tire inner surface of the tread portion.

本実施形態では、制振部材４０は、タイヤ径方向内面にタイヤ径方向外側に窪む凹部４１を備えている。凹部４１は、略四角柱状に窪んで形成され、制振部材４０のタイヤ径方向内面に、タイヤ周方向及びタイヤ幅方向にそれぞれ複数の凹部４１が等間隔に形成されている。   In the present embodiment, the damping member 40 includes a concave portion 41 that is depressed outward in the tire radial direction on the inner surface in the tire radial direction. The recess 41 is formed in a substantially quadrangular prism shape, and a plurality of recesses 41 are formed at equal intervals in the tire circumferential direction and the tire width direction on the inner surface of the vibration damping member 40 in the tire radial direction.

これにより、制振部材４０に吸音部材１０が取り付けられると、制振部材４０と吸音部材１０との間に、凹部４１の内面と吸音部材１０のタイヤ径方向外面とによって区画される空洞部４２が形成される。制振部材４０と吸音部材１０との間には、タイヤ周方向及びタイヤ幅方向にそれぞれ複数の空洞部４２が等間隔に形成される。   Thus, when the sound absorbing member 10 is attached to the vibration damping member 40, the hollow portion 42 defined between the vibration damping member 40 and the sound absorbing member 10 by the inner surface of the concave portion 41 and the tire radial outer surface of the sound absorbing member 10. Is formed. Between the vibration damping member 40 and the sound absorbing member 10, a plurality of hollow portions 42 are formed at equal intervals in the tire circumferential direction and the tire width direction.

本実施形態では、制振部材４０のタイヤ径方向内面に、略四角柱状に窪む凹部４１が形成されているが、略三角柱状や略円柱状などの他の形状に窪む凹部を形成することも可能である。また、制振部材４０のタイヤ径方向内面に形成される凹部として、タイヤ幅方向やタイヤ周方向に延びる凹部を形成することも可能である。   In the present embodiment, the recess 41 that is recessed in a substantially quadrangular prism shape is formed on the inner surface in the tire radial direction of the vibration damping member 40, but the recess that is recessed in another shape such as a substantially triangular prism shape or a substantially cylindrical shape is formed. It is also possible. Further, as the concave portion formed on the inner surface in the tire radial direction of the vibration damping member 40, a concave portion extending in the tire width direction or the tire circumferential direction can be formed.

また、制振部材４０は、トレッド部のタイヤ内面に吸音部材１０のタイヤ径方向外面全体にのみ取り付けられているが、第１実施形態に係る空気入りタイヤ１と同様に、制振部材４０を、吸音部材１０よりタイヤ幅方向両側に延ばしてトレッド部３、両側のビード部４及び両側のサイドウォール部５のタイヤ内面１ａに取り付けるようにすることも可能である。   Further, the vibration damping member 40 is attached only to the entire tire radially outer surface of the sound absorbing member 10 on the tire inner surface of the tread portion, but like the pneumatic tire 1 according to the first embodiment, the vibration damping member 40 is It is also possible to extend from the sound absorbing member 10 to both sides in the tire width direction and to attach the tread portion 3, the bead portions 4 on both sides, and the tire inner surface 1a of the sidewall portions 5 on both sides.

制振部材４０のタイヤ径方向内面に形成される凹部４１は、空気入りタイヤ１を製造する際に、タイヤを金型内で加硫成形するときに、加硫成形に用いるブラダーの表面を制振部材４０のタイヤ径方向内面に対応する形状に形成することで、加硫成形してタイヤが製造されるときにタイヤ内面に取り付けられる制振部材４０のタイヤ径方向内面に凹部４１を形成することができる。   The concave portion 41 formed on the inner surface in the tire radial direction of the vibration damping member 40 controls the surface of a bladder used for vulcanization molding when vulcanizing and molding the tire in a mold when manufacturing the pneumatic tire 1. By forming into a shape corresponding to the tire radial inner surface of the vibration member 40, the concave portion 41 is formed on the tire radial inner surface of the vibration damping member 40 attached to the tire inner surface when the tire is manufactured by vulcanization molding. be able to.

本実施形態に係る空気入りタイヤについても、タイヤ内面に取り付けられたスポンジからなる吸音部材１０と、タイヤ内面と吸音部材１０との間に配置されたゴムからなる制振部材４０とが備えられることにより、空洞共鳴音を抑制すると共に生産性の向上を図ることができる。   The pneumatic tire according to the present embodiment also includes a sound absorbing member 10 made of a sponge attached to the tire inner surface, and a vibration damping member 40 made of rubber disposed between the tire inner surface and the sound absorbing member 10. Thereby, the cavity resonance can be suppressed and the productivity can be improved.

また、制振部材４０は、タイヤ径方向内面にタイヤ径方向外側に窪む凹部４１を備え、制振部材４０と吸音部材１０との間に、凹部４１の内面と吸音部材１０のタイヤ径方向外面とによって区画される空洞部４２が形成される。これにより、制振部材４０と吸音部材１０との間に形成される空洞部４２によって、タイヤ接地面からの振動によって生じるタイヤ内部の空気の振動による音が低減されるので、空洞共鳴音をさらに抑制することができる。   Further, the vibration damping member 40 includes a concave portion 41 depressed outward in the tire radial direction on the tire radial inner surface, and between the vibration damping member 40 and the sound absorbing member 10, the inner surface of the concave portion 41 and the tire radial direction of the sound absorbing member 10. A cavity 42 defined by the outer surface is formed. Accordingly, the cavity portion 42 formed between the vibration damping member 40 and the sound absorbing member 10 reduces the sound due to the vibration of the air inside the tire caused by the vibration from the tire contact surface, and further reduces the cavity resonance sound. Can be suppressed.

図６は、本発明の第４実施形態に係る空気入りタイヤのタイヤ内面に取り付けられる吸音部材及び制振部材を示す図である。図６では、吸音部材及び制振部材を平面状に展開した状態で示している。第４実施形態に係る空気入りタイヤは、第２実施形態に係る空気入りタイヤと、制振部材及び吸音部材の形状が異なること以外は同様であるので、同様の構成については説明を省略する。   FIG. 6 is a diagram showing a sound absorbing member and a vibration damping member attached to the inner surface of a pneumatic tire according to a fourth embodiment of the present invention. FIG. 6 shows the sound absorbing member and the vibration damping member in a state where they are developed in a plane. The pneumatic tire according to the fourth embodiment is the same as the pneumatic tire according to the second embodiment except that the shapes of the vibration damping member and the sound absorbing member are different, and a description of the same configuration will be omitted.

第４実施形態に係る空気入りタイヤについても、タイヤ内面にタイヤ周方向に延びる吸音部材１０´が取り付けられると共に、タイヤ内面と吸音部材１０´との間にタイヤ周方向に延びる制振部材５０が配置され、吸音部材１０´は、制振部材５０を介してタイヤ内面に取り付けられる。   Also in the pneumatic tire according to the fourth embodiment, a sound absorbing member 10 'extending in the tire circumferential direction is attached to the tire inner surface, and a vibration damping member 50 extending in the tire circumferential direction is provided between the tire inner surface and the sound absorbing member 10'. The sound absorbing member 10 ′ is disposed and attached to the tire inner surface via the vibration damping member 50.

図６に示すように、第４実施形態に係る空気入りタイヤでは、制振部材５０は、トレッド部のタイヤ内面に吸音部材１０のタイヤ径方向外面全体にのみ取り付けられる。   As shown in FIG. 6, in the pneumatic tire according to the fourth embodiment, the vibration damping member 50 is attached to the tire inner surface of the tread portion only on the entire tire radial outer surface in the tire radial direction.

本実施形態では、制振部材５０は、略平板状に形成される基部５１と、タイヤ径方向内面にタイヤ径方向内側に突出する複数の凸部５２とを備えている。複数の凸部５２は、タイヤ周方向に離間して配置され、好ましくはタイヤ周方向に等間隔に離間して配置される。複数の凸部５２はそれぞれ、吸音部材１０´と同一のタイヤ幅方向長さを有してタイヤ幅方向に延び、タイヤ幅方向から見て略矩形状に形成されている。   In the present embodiment, the damping member 50 includes a base 51 formed in a substantially flat plate shape, and a plurality of protrusions 52 protruding inward in the tire radial direction on the inner surface in the tire radial direction. The plurality of protrusions 52 are arranged at intervals in the tire circumferential direction, and are preferably arranged at equal intervals in the tire circumferential direction. Each of the plurality of protrusions 52 has the same length in the tire width direction as the sound absorbing member 10 ′, extends in the tire width direction, and is formed in a substantially rectangular shape when viewed from the tire width direction.

吸音部材１０´は、タイヤ径方向外面に制振部材５０の複数の凸部５２に対応して形成されたタイヤ径方向内側に窪む複数の溝部１１を備えると共に、タイヤ径方向内面にタイヤ径方向内側に突出する複数の突部１２を備えている。複数の突部１２は、タイヤ周方向に離間して配置され、好ましくはタイヤ周方向に等間隔に離間して配置される。複数の突部１２はそれぞれ、タイヤ幅方向に延び、タイヤ幅方向に見て略半円状に形成されている。   The sound absorbing member 10 ′ has a plurality of grooves 11 formed on the outer surface in the tire radial direction corresponding to the plurality of protrusions 52 of the vibration damping member 50 and recessed inward in the tire radial direction. A plurality of protrusions 12 projecting inward in the direction are provided. The plurality of protrusions 12 are arranged apart from each other in the tire circumferential direction, and are preferably arranged at equal intervals in the tire circumferential direction. Each of the plurality of protrusions 12 extends in the tire width direction, and is formed in a substantially semicircular shape when viewed in the tire width direction.

本実施形態では、吸音部材１０´の突部１２は、タイヤ幅方向から見て略半円状に形成されているが、タイヤ幅方向から見て略三角状や略矩形状などの他の形状に形成することも可能である。   In the present embodiment, the protrusion 12 of the sound absorbing member 10 ′ is formed in a substantially semicircular shape when viewed from the tire width direction, but has another shape such as a substantially triangular shape or a substantially rectangular shape when viewed from the tire width direction. It is also possible to form it.

また、制振部材５０は、トレッド部のタイヤ内面に吸音部材１０´のタイヤ径方向外面全体にのみ取り付けられているが、第１実施形態に係る空気入りタイヤ１と同様に、制振部材５０を、吸音部材１０´よりタイヤ幅方向両側に延ばしてトレッド部３、両側のビード部４及び両側のサイドウォール部５のタイヤ内面１ａに取り付けるようにすることも可能である。   Further, the vibration damping member 50 is attached only to the entire tire radially outer surface of the sound absorbing member 10 ′ on the tire inner surface of the tread portion. However, similar to the pneumatic tire 1 according to the first embodiment, the vibration damping member 50 is provided. Can be extended to both sides in the tire width direction from the sound absorbing member 10 ′ and attached to the tire inner surface 1 a of the tread portion 3, the bead portions 4 on both sides, and the sidewall portions 5 on both sides.

制振部材５０のタイヤ径方向内面に形成される凸部５２は、空気入りタイヤを製造する際に、タイヤを金型内で加硫成形するときに、加硫成形に用いるブラダーの表面を制振部材５０のタイヤ径方向内面に対応する形状に形成することで、加硫成形してタイヤが製造されるときにタイヤ内面に取り付けられる制振部材５０のタイヤ径方向内面に凸部５２を形成することができる。   The convex portion 52 formed on the inner surface in the tire radial direction of the vibration damping member 50 controls the surface of a bladder used for vulcanization molding when vulcanizing the tire in a mold when manufacturing a pneumatic tire. By forming into a shape corresponding to the tire radial inner surface of the vibration member 50, a convex portion 52 is formed on the tire radial inner surface of the vibration damping member 50 attached to the tire inner surface when the tire is manufactured by vulcanization molding. can do.

本実施形態に係る空気入りタイヤについても、タイヤ内面に取り付けられたスポンジからなる吸音部材１０´と、タイヤ内面と吸音部材１０´との間に配置されたゴムからなる制振部材５０とが備えられることにより、空洞共鳴音を抑制すると共に生産性の向上を図ることができる。   The pneumatic tire according to the present embodiment also includes a sound absorbing member 10 'made of a sponge attached to the tire inner surface, and a vibration damping member 50 made of rubber disposed between the tire inner surface and the sound absorbing member 10'. By doing so, it is possible to suppress cavity resonance and improve productivity.

また、吸音部材１０´は、タイヤ径方向内面にタイヤ周方向に離間して配置されてタイヤ径方向に内側に突出する突部１２を備えている。これにより、吸音部材１０´のタイヤ径方向内面にタイヤ周方向に離間して配置された複数の突部１２によって吸音部材１０´のタイヤ径方向内面に凹凸を形成することができるので、タイヤ接地面からの振動によって生じるタイヤ内部の音が放射状に伝播される際に、吸音部材１０´のタイヤ径方向内面に形成される凹凸によって音を低減することができ、空洞共鳴音をさらに抑制することができる。   In addition, the sound absorbing member 10 ′ includes a protrusion 12 that is arranged on the inner surface in the tire radial direction so as to be spaced apart in the tire circumferential direction and protrudes inward in the tire radial direction. This makes it possible to form irregularities on the inner surface of the sound absorbing member 10 ′ in the tire radial direction by the plurality of protrusions 12 arranged on the inner surface of the sound absorbing member 10 ′ in the tire radial direction so as to be spaced apart from each other in the tire circumferential direction. When the sound inside the tire caused by vibration from the ground is radially propagated, the sound can be reduced by the unevenness formed on the tire radial inner surface of the sound absorbing member 10 ′, thereby further suppressing the cavity resonance sound. Can be.

前述した実施形態では、制振部材２０、３０、４０、５０は、タイヤが加硫成形されるときにタイヤと共に加硫成形されてタイヤ内面に取り付けられているが、タイヤ内面に、接着剤又は両面テープなどの適宜の接合手段を用いてタイヤ内面に取り付けるようにすることも可能である。   In the above-described embodiment, the vibration damping members 20, 30, 40, and 50 are vulcanized and molded together with the tire when the tire is vulcanized and attached to the inner surface of the tire. It is also possible to use a suitable joining means such as a double-sided tape to attach to the inner surface of the tire.

本発明は、例示された実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において、種々の改良及び設計上の変更が可能である。   The present invention is not limited to the illustrated embodiment, and various improvements and design changes can be made without departing from the spirit of the present invention.

１ 空気入りタイヤ
１ａ タイヤ内面
１０、１０´ 吸音部材
１２ 突部
２０、３０、４０、５０ 制振部材
４１ 凹部
４２ 空洞部 DESCRIPTION OF SYMBOLS 1 Pneumatic tire 1a Tire inner surface 10, 10 'Sound absorbing member 12 Protrusion 20, 30, 40, 50 Damping member 41 Concave part 42 Cavity part

Claims (6)

タイヤ内面に取り付けられてタイヤ周方向に延びるスポンジからなる吸音部材と、
前記タイヤ内面と前記吸音部材との間に配置されてタイヤ周方向に延びるゴムからなる制振部材と
を備えている、空気入りタイヤ。 A sound absorbing member made of a sponge attached to the tire inner surface and extending in the tire circumferential direction,
A pneumatic tire comprising a rubber damping member disposed between the tire inner surface and the sound absorbing member and extending in a tire circumferential direction. 前記制振部材は、タイヤ周方向全体に亘って配置されている、
請求項１に記載の空気入りタイヤ。 The vibration damping member is disposed over the entire tire circumferential direction,
The pneumatic tire according to claim 1. 前記吸音部材は、タイヤ周方向全体に亘って取り付けられている、
請求項１又は請求項２に記載の空気入りタイヤ。 The sound absorbing member is attached throughout the tire circumferential direction,
The pneumatic tire according to claim 1 or 2. 前記制振部材は、タイヤ内面を構成するインナーライナのゴムより損失正接（ｔａｎδ）が大きいゴムから形成されている、
請求項１から請求項３の何れか１項に記載の空気入りタイヤ。 The vibration damping member is formed of rubber having a larger loss tangent (tan δ) than the rubber of the inner liner that forms the inner surface of the tire.
The pneumatic tire according to any one of claims 1 to 3. 前記制振部材は、タイヤ径方向内面にタイヤ径方向外側に窪む凹部を備え、
前記制振部材と前記吸音部材との間に、前記凹部の内面と前記吸音部材のタイヤ径方向外面とによって区画される空洞部が形成されている、
請求項１から請求項４の何れか１項に記載の空気入りタイヤ。 The vibration damping member includes a concave portion that is depressed outward in the tire radial direction on an inner surface in the tire radial direction,
A cavity defined by the inner surface of the concave portion and the outer surface in the tire radial direction of the sound absorbing member is formed between the vibration damping member and the sound absorbing member,
The pneumatic tire according to any one of claims 1 to 4. 前記吸音部材は、タイヤ径方向内面にタイヤ周方向に離間して配置されてタイヤ径方向内側に突出する突部を備えている、
請求項１から請求項４の何れか１項に記載の空気入りタイヤ。 The sound absorbing member includes a protrusion that is disposed on the inner surface in the tire radial direction so as to be spaced apart in the tire circumferential direction and projects inward in the tire radial direction.
The pneumatic tire according to any one of claims 1 to 4.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127101A (en) * 1988-11-04 1990-05-15 Sumitomo Rubber Ind Ltd Pneumatic tire
JPH04365605A (en) * 1990-09-14 1992-12-17 Honda Motor Co Ltd Pneumatic tire
JP2003048407A (en) * 2001-08-02 2003-02-18 Sumitomo Rubber Ind Ltd Assembly of pneumatic tire with rim
JP2013043643A (en) * 2011-08-26 2013-03-04 Hankook Tire Co Ltd Pneumatic tire and method for manufacturing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127101A (en) * 1988-11-04 1990-05-15 Sumitomo Rubber Ind Ltd Pneumatic tire
JPH04365605A (en) * 1990-09-14 1992-12-17 Honda Motor Co Ltd Pneumatic tire
JP2003048407A (en) * 2001-08-02 2003-02-18 Sumitomo Rubber Ind Ltd Assembly of pneumatic tire with rim
JP2013043643A (en) * 2011-08-26 2013-03-04 Hankook Tire Co Ltd Pneumatic tire and method for manufacturing the same

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