JP4025531B2 - Strut mount - Google Patents

Strut mount Download PDF

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Publication number
JP4025531B2
JP4025531B2 JP2001326700A JP2001326700A JP4025531B2 JP 4025531 B2 JP4025531 B2 JP 4025531B2 JP 2001326700 A JP2001326700 A JP 2001326700A JP 2001326700 A JP2001326700 A JP 2001326700A JP 4025531 B2 JP4025531 B2 JP 4025531B2
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Japan
Prior art keywords
plate member
stopper plate
inner cylinder
fitting
strut mount
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JP2001326700A
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Japanese (ja)
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JP2002310209A (en
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道治 彦坂
郁夫 佐々木
一宏 堀越
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Sumitomo Riko Co Ltd
Toyota Motor Corp
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Sumitomo Riko Co Ltd
Toyota Motor Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、車両のサスペンションのピストンロッドと車体側部材等との間に介装されて、サスペンション側からピストンロッドを通して車体側に伝播しようとする入力振動を緩和する車両サスペンション用のストラットマウントに関する。
【0002】
【従来の技術】
従来、この種のストラットマウント10Aは、例えば、図1に示すように、有底筒状の内筒金具11と、内筒金具11の上部開口端に固定された偏平状金具であるストッパ板部材20Aと、内筒金具11の外方に同軸状に配置された外筒金具25と、内筒金具11と外筒金具25との間を弾性的に連結するゴム等の弾性体部31とにより構成され、内筒金具11が下部開口端側にてショックアブソーバ2のピストンロッド3の上端部に同軸状に固定されると共に外筒金具25がフランジ部28にて車体側部材1に固定されている。
【0003】
内筒金具11は、図2及び図4に示すように、小径部12の開口端側から軸方向の所定位置に至る範囲の外周面全面にわたって軸心方向に所定厚さ削除された薄肉の取付部15になっており、取付部15外周面と小径部12の他の部分の外周面との境界が段部15aになっている。内筒金具11に対して、取付部15の外径と略同一内径の中心穴22aを有するストッパ板部材20Aが中心穴22aにて取付部15に挿入されて段部15aに当接した状態で、取付部15を径方向外方に折り曲げてストッパ板部材20Aの中心穴22aの周囲に重ね合せ、その重ね部を押圧して加締めることにより、ストッパ板部材20Aは内筒金具11に固着されている。かかる構成のストラットマウント10Aによれば、ショックアブソーバ2側からピストンロッド3を通して車体側に伝播しようとする振動入力を、弾性体部31の振動吸収作用によって緩和することができる。
【0004】
【発明が解決しようとする課題】
ところで、上記ストラットマウント10Aにおいては、折り曲げられた内筒金具11の取付部15によるストッパ板部材20Aに対する締付けが弱いと、ピストンロッド3からのリバウンド入力の発生により、外筒金具25の上端に配設された弾性体部を介してストッパ板部材20Aに入力されたときに、取付部15の締付けが弛み易くなる。そのため、ストッパ板部材20Aが回転したり、さらにはストッパ板部材20Aが内筒金具11から抜け落ちてしまうおそれもあった。さらに、ストッパ板部材20Aの回転により、ストッパ板部材20Aと内筒金具11とがその接触面で擦れ合うことによって異音が発生して、車両の乗員に不快感を与えるおそれがあった。
【0005】
本発明は上記した問題を解決しようとするもので、ストッパ板部材の回転や内筒金具からの脱落を防止できると共に、異音の発生を抑えることができる車両用サスペンションのストラットマウントを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために、上記請求項1に記載の発明の構成上の特徴は、筒状の金具であってその上部開口端から軸方向の所定位置に至る範囲の外周面全面が軸心方向に同軸状に凹んだ取付部になっており、取付部の外周面と他の部分の外周面との境界が段部になっている内筒金具と、偏平状の金具であって内筒金具の取付部の外径と略同一内径の中心穴を有し、中心穴にて取付部の外周面側に挿嵌されて段部に当接した状態で、取付部が径方向外方に折り曲げられて中心穴の周囲に重ね合わされ、重ね合わされた重ね部によって押圧されることにより内筒金具に固着されたストッパ板部材と、内筒金具の外方に同軸状に配置されると共に過大な振動入力に対してストッパ板部材との対向端部がストッパ板部材に当接することにより軸方向の動きが制限されるようになっている筒状の外筒金具と、内筒金具と外筒金具との間を弾性的に連結する筒状の弾性体部とを設けてなり、内筒金具が下部開口端側にてショックアブソーバのピストンロッドの上端部に同軸状に固定され、外筒金具が車体側部材に固定される車両サスペンション用のストラットマウントにおいて、内筒金具の取付部における重ね部又は段部が当接するストッパ板部材の当接面に線状の溝を設け、ストッパ板部材の材質の方が、内筒金具の材質より硬いことにある。
【0007】
上記のように構成した請求項1の発明においては、内筒金具における取付部の重ね部又は段部に当接するストッパ板部材の当接面に線状の溝を設けている。そのため、ストッパ板部材が中心穴にて取付部の外周側に挿嵌されて段部に当接した状態で、取付部を径方向外方に折り曲げてストッパ板部材の中心穴の周囲に重ね合わせ、重ね合わせた取付部の重ね部を押圧して加締めることにより、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となり、取付部とストッパ板部材との間に緊密な接触が形成される。そのため、ストッパ板部材が、強固に内筒金具に固定された状態になり、サスペンション側からのリバウンド入力を受けても、取付部のストッパ板部材に対する締付け部分での弛みを抑えることができる。
【0008】
また、内筒金具の取付部によりストッパ板部材に加える押圧力がばらついた場合、ストッパ板部材の当接面に線状の溝を設けていないと、内筒金具の取付部とストッパ板部材間に弛みが発生し易くなるが、線状の溝を設けていることにより押圧力が多少ばらついたとしても、重ね部又は段部がストッパ板部材との接触面において線状の溝に食い込んだ状態になる。そのため、内筒金具の取付部とストッパ板部材間の弛みの発生を抑えることができ、ストッパ板部材の内筒金具による固定状態を安定して維持することができる。また、取付部の重ね部や段部に溝を形成することに比べて、ストッパ板部材に溝を形成することは、容易に行うことができる
【0009】
また、ストッパ板部材の材質の方が、内筒金具の材質より硬いため、取付部を径方向外方に折り曲げて、かつ重ね部によってストッパ板部材の中心穴の周囲に押圧して加締めたとき、ストッパ板部材と重ね部又は段部との接触面において、重ね部又は段部の線状の溝への食い込みが一層強力に行われることになり、両者の一層緊密な接触が形成される
【0010】
また、上記請求項2に記載の発明の構成上の特徴は、前記請求項1に記載のストラットマウントにおいて、ストッパ板部材の当接面に設けた線状の溝が、中心穴周囲の周方向複数個所に、中心穴から径方向に延びるように設けられたことにある。
【0011】
また、上記請求項3に記載の発明の構成上の特徴は、前記請求項1又は2に記載のストラットマウントにおいて、内筒金具の取付部が、上部開口端から軸方向の所定位置に至る範囲の外周面全面にわたって軸心方向に所定厚さ削除されて薄肉に形成されたものであり、取付部の外周面と他の部分の外周面との境界が段部になっていることにある。
【0012】
上記請求項3の発明においては、内筒金具の取付部にストッパ板部材が挿嵌されて段部に当接した状態で、取付部を径方向外方に折り曲げてストッパ板部材の中心穴の周囲に重ね合わせ、重ね合わされた重ね部を押圧して加締めたとき、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となり、取付部とストッパ板部材との緊密な接触が形成される。また、取付部を薄肉にしたことにより、曲げ加工が容易になると共に、内筒金具の重量を軽減することができる。
【0013】
また、上記請求項4に記載の発明の構成上の特徴は、前記請求項1又は2に記載のストラットマウントにおいて、内筒金具が、その上部開口端から軸方向の所定距離離れた位置において外周面の全周にわたって軸直角方向内方に折り曲げられて径方向内方にわずかに延びる段部に形成されると共に、段部の径方向内端位置にてさらに軸方向に平行になるように折り返されて取付部に形成されていることにある。
【0014】
上記請求項4の発明においては、内筒金具の取付部にストッパ板部材が挿嵌されて段部に当接した状態で、取付部を径方向外方に折り曲げてストッパ板部材の中心穴の周囲に重ね合わせ、重ね合わされた重ね部を押圧して加締めたとき、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となり、取付部とストッパ板部材との緊密な接触が形成される。また、段部、取付部及び重ね部については内筒金具の曲げ加工により形成されることで板厚が減少することになり、それに伴い重ね部による締め付け力が相対的に低下するが、ストッパ板部材の取付部の重ね部又は段部との当接面に線状の溝が設けられていることによって板厚の減少をカバーすることができ、両者の緊密な接触が確保される。
【0015】
また、上記請求項5に記載の発明の構成上の特徴は、前記請求項1又は2に記載のストラットマウントにおいて、内筒金具が、内側筒部と内側筒部の外周面に重ね合わされた外側筒部とにより一体に構成されており、外側筒部の上端が内側筒部の上部開口端から軸方向に所定距離離れて配置されて外側筒部の上端が内側筒部に対して段部になっており、内側筒部の段部から上端開口端に至る部分が取付部になっていることにある。
【0016】
上記請求項5の発明においては、内筒金具の取付部にストッパ板部材が挿嵌されて外側筒部の段部に当接した状態で、内側筒部の先端側の取付部を径方向外方に折り曲げてストッパ板部材の中心穴の周囲に重ね合わせ、重ね合わされた重ね部を押圧して加締めたとき、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となり、取付部とストッパ板部材との緊密な接触が形成される。また、外側筒部の上端が内側筒部に対して段部になっていることから、外筒金具とストッパ板部材が当接する際に、軸方向にわずかなずれが生じて、ストッパ板部材のゆるみが生じる可能性がある。しかし、ストッパ板部材の重ね部又は段部との当接面に線状の溝が設けられて、両者の緊密な接触が確保されていることにより、ストッパ板部材のゆるみを防止することができる。
【0017】
【発明の実施の形態】
以下、本発明の一実施形態について図面を用いて説明する。図1は、第1実施形態である車両サスペンション用のストラットマウント10がショックアブソーバ2のピストンロッド3と車体側部材1との間に介装された状態を断面図により示したものであり、図2〜図4は、ストラットマウント10を断面図、平面図及び要部断面図により示したものである。さらに、図5は、ストラットマウント10を構成する加硫成形品Mを断面図により示したものであり、図6は、ストッパ板部材を断面図等により示したものである。
【0018】
ストラットマウント10は、金属厚板製(例えばSPHE製)の筒状の内筒金具11と、内筒金具11の上端側に固着された円盤状のストッパ板部材20と、内筒金具11の外方に同軸状に配置された外筒金具25と、内筒金具11及び外筒金具25との間を弾性的に連結するゴム弾性体部31とを備えている。以下、ストラットマウント10が装着される車体側を上側、サスペンション側を下側として説明する。
【0019】
内筒金具11は、図5に示すように、軸方向上下に円筒形の小径部12と、小径部12よりわずかに径の大きい大径部13とを有しており、両者の境が段差部14になっている。小径部12は、上端開口12aから軸方向の所定長さ部分が、外周面全面にわたって径方向に削除されて略半分の厚さにされた薄肉の取付部15になっており、取付部15外周面と小径部12の他の部分の外周面との境界が段部15aになっている。大径部13の下端は、軸心側にわずかに延びたフランジ部13aになっている。大径部13内には、円筒形のボールベアリング16が同軸的に緊密に挿嵌されており、フランジ部13aによって大径部13内に保持されている。なお、ベアリング16のフランジ部13a開口からの露出面には、図1に示すように、ショックアブソーバ2のコイルスプリング4を受けるためのスプリングシート6が取り付けられるようになっている。スプリングシート6は、後述する外側部材17と同様に円錐筒状であって、外周側がコイルスプリング4をダストカバー5を介して受止める平坦な受部になっている。
【0020】
また、大径部13の径方向外側には、金属板製でかつ全体として軸心方向にわずかに凹んだ略円錐面状の外側部材17が同軸的に配置されており、外側部材17の上端側はわずかに縮径した係合部18になっている。外側部材17は、係合部18が小径部12と大径部13との間の段差部14位置に係合し、その下端が軸方向に大径部13の下端よりわずかに下方に延びて配置されている。外側部材17は、係合部18にて段差部14位置で小径部12に溶接等により固定されている。
【0021】
ストッパ板部材20は、図6に示すように、金属厚板製で上面開放の偏平な円形の容器形状であり、軸方向長さの短い逆円錐面形状の筒状部21を設けており、その下端に径方向内方にわずかに延びた円環状の底面部22を一体で設けている。また、筒状部21の上端の全周には、円環状の鍔部23が、軸心に対して径方向外方に延びて一体で設けられている。底面部22の内側同心位置には、中心穴22aが設けられており、その内径は上記取付部15の外径よりわずかに大きくなっている。筒状部21と底面部22及び筒状部21と鍔部23のそれぞれの境界は、円弧状曲面にされている。
【0022】
さらに、底面部22の内側表面(図示上面)において、中心穴22a周囲の周方向複数箇所には、中心穴22aから径方向に延びた線状の溝である溝部24が設けられている。溝部24は、図6(c),(d)に拡大して示すように、断面逆三角形の凹部であり、その径方向端部が後述する取付部15の重ね部15bの外周位置にほぼ等しくなるような長さにされている。なお、ストッパ板部材20の材質については、例えばSAPH440のように、内筒金具11の材質であるSPHEに比べて硬い材質を用いることが好ましい。このストッパ板部材20については、金属円板に絞り加工及びプレス加工を施すことにより全体形状が形成され、さらに底面部22の中心をパンチング加工によって打ち抜くことにより中心穴22aが形成される。ストッパ板部材20のプレス加工による形成時に、溝部24も同時に形成される。
【0023】
外筒金具25は、1枚の金属板の絞り加工、プレス加工等により形成されており、円錐面状の筒部26と、筒部26の上端で全周にわたって外方に折り返されて筒部26の軸方向略中間まで延びると共に筒部26に重ね合わされた折返し部27と、折返し部27の下端部から全周にわたって径方向に延びた平板状のフランジ部28とにより構成されている。筒部26の下端外径は、外側部材17の外径よりわずかに小さくされている。すなわち、外側部材17の下端部分は、外筒金具25のストッパとしての機能を果たしている。
【0024】
フランジ部28の外形は、図3に示すように、平面視で略正三角形状の各頂部を円弧形に切欠いた異形形状になっている。フランジ部28には、上記略正三角形の頂部に対応する所定領域の略中心位置に、取付孔28aが設けられている。また、フランジ部28の周縁位置には、フランジ部に対して垂直にかつ折返し部27の反対方向にわずかに延びる垂直部29が設けられている。
【0025】
ゴム弾性体部31は、図2,図5に示すように、内筒金具11の小径部12の外周面における段部15aのわずかに軸方向下側から外側金具17の下端外周縁近傍位置の間の範囲と、外筒金具25の筒部26内周面全面との間に周方向全周にわたって配設されており、両金具11,25間を弾性的に連結している。また、ゴム弾性体部31の一部が、筒部26の上側に突出した突出部32になっている。突出部32は、内筒金具11に取り付けられたストッパ板部材20の鍔部23に圧縮状態で当接している。ゴム弾性体部31は、成形金型に内筒金具11と外筒金具25とをセットしてゴム加硫成形を行うことにより、図5に示す中間品であるゴム加硫成形品Mとして一体で成形される。
【0026】
このゴム加硫成形品Mの内筒金具11には、大径部13内にベアリング16が挿嵌された後、大径部13下端を絞り加工により軸心方向に曲げてフランジ部13aを形成することにより、ベアリング16が大径部13内に保持される。つぎに、内筒金具11へのストッパ板部材20の取り付けについては、まずストッパ板部材20を、その底面部22側から中心穴22aにて取付部15の外周側に嵌め合わせて段部15aに載置させる。この状態で、図4に詳細に示すように、取付部15に絞り加工を施して外側に曲げ、取付部15先端側の重ね部15bをストッパ板部材20に重ね合わせる。重ね部15bの外周位置は、小径部12の外周面より径方向外側位置まで延びている。さらに、重ね部15bを押圧してストッパ板部材20に加締めつけることにより、ストッパ板部材20は内筒金具11の取付部15に固着され、ストラットマウント10として形成される。
【0027】
ここで、重ね部15bと接触するストッパ板部材20の当接面には、プレス加工により溝部24が形成されており、かつストッパ板部材20は、内筒金具11の材質より硬い材質で形成されている。そのため、重ね部15bによってストッパ板部材20の中心穴22aの周囲が押圧されたとき、重ね部15bがストッパ板部材20の溝部24に食い込んだ状態となる。また、重ね部15bと溝部24の重なり位置が、小径部12の外周より径方向外方になり、両者の接触領域が広くされている。そのため、ストッパ板部材20と重ね部15bとの間に緊密な接触が形成され、ストッパ板部材20が強固に小径部12に固定される。
【0028】
ストラットマウント10の車両への組付けは、以下に示すように行われる。図1に示すように、車体側部材1の開口1aにストラットマウント10が下方から挿入されて、外筒金具25のフランジ部28の取付孔28a位置にてボルト35が挿入され、車体側部材1から突出したボルト35にナット36を螺着させることによって、フランジ部28が車体側部材1に固定される。また、車輪7に取り付けられたショックアブソーバ2のピストンロッド3の先端がストラットマウント10のベアリング16の軸孔に挿入され、ベアリング16から突出したピストンロッド3の先端ねじ部に、ナット3aを螺着させることにより、ピストンロッド3がストラットマウント10に固定される。
【0029】
上記のように構成した実施形態においては、ストッパ板部材20の底面部22の内側表面にて中心穴22a周囲に溝部24を設けていることにより、取付部15の重ね部15bによって段部15aに押付けられたストッパ板部材20は、溝部24に重ね部15bが強固に食い込んだ状態となり、重ね部15bとの間に緊密な接触が形成される。そのため、ストッパ板部材20が、強固に内筒金具11に固定された状態になる。さらに、ストッパ板部材20の材質は、内筒金具11の材質より硬いので、重ね部15bの溝部24への食い込みはさらに強固に行われ、ストッパ板部材20が、一層強固に内筒金具11に固定された状態になる。
【0030】
その結果、本実施形態によれば、ショックアブソーバ2からのリバウンド入力を受けても、取付部15によるストッパ板部材20の締付け部分での弛みを抑えることができ、ストッパ板部材20が回転したり、さらに内筒金具11から脱落したりする不都合を確実に防止することができる。また、ストッパ板部材20の回転に伴うストッパ板部材20と内筒金具11の接触による異音の発生を防止することができ、車両の乗り心地を改善することができる。また、取付部15を薄肉にしたことにより、曲げ加工が容易になると共に、内筒金具11の重量を軽減することができる。
【0031】
なお、ストラットマウントとしては、上記実施形態に示したものに限らず、図7に示す構造のものであってもよい。このストラットマウント40は、筒状の内筒金具41と、その上端側に固着された上記ストッパ板部材20と、内筒金具41の外方に同軸状に配置された外筒金具51と、内筒金具41及び外筒金具51との間を弾性的に連結するゴム弾性体部55とを備えている。
【0032】
内筒金具41は、有底円筒形の本体42と、その底部に固定された受部材45とを備えている。本体42底面と受部材45には、それぞれピストンロッド取り付けのための取付孔が形成されている。本体42の上端側には切削加工により外周面側を削除することにより形成された薄肉の取付部43が設けられており、取付部43と他の部分との外周側境界が段部44になっている。ストッパ板部材20は、上記実施形態に示したと同様に、本体42の段部44に載置された状態で、取付部43を径方向外方に折り曲げて重ね合わせ、重ね部43aによって押圧されることにより本体42に固定される。外筒金具51は、上方から下方に向けて拡径方向にわずかに傾斜した円錐面状の筒状部52を有しており、筒状部52の下端部には、軸心に対してわずかに傾斜した状態で径方向外方に延びた円環状のフランジ部53を設けている。このストラットマウント40についても、図8に示すように、車体側部材1とショックアブソーバ2のピストンロッド3の上端間に組み付けられる。そして、ストラットマウント40についても、ストッパ板部材20を用いたことにより、上記ストラットマウント10において得られた効果と同様の効果が得られる。
【0033】
なお、上記実施形態においては、ストッパ板部材20の底面部22の内側面に溝部24を設けているが、これに代えて底面部22の外側表面(図示下面)に溝部を設けてもよい。また、ストッパ板部材20に溝部24を設けることに加えて、内筒金具11,41における取付部15,43の重ね部15b,43a及び段部15a,44の少なくとも一方にプレス加工あるいはショットブラスト加工による凹凸を設けてもよい。
【0034】
つぎに、ストッパ板部材20の参考例として、図9に示すように、底面部22の外側表面(図示下面)において、中心穴22a周囲に周方向全周にわたって帯状に凹凸部24Aを設けてもよい。凹凸部24Aは、プレス加工が施されることにより、図9(c)に拡大して示すような小さい突起24Bが規則的に形成される。プレス加工の代わりにショットブラスト加工により凹凸部を形成してもよい。また、底面部22の外側表面(図示下面)の凹凸部24Aに加えてまたはそれに代えて、底面部22の内側表面(図示上面)中心穴22a周囲に周方向全周にわたって帯状に凹凸部を設けてもよい。このストッパ板部材20を採用することによっても、上記実施形態に示したと同様の効果が得られる。
【0035】
つぎに、第2実施形態について図10及び図11により説明する。
本実施形態は、上記第1実施形態における内筒金具11の取付部の形状を変更したものである。図10、図11に示すように、内筒金具61は、小径部62の上部開口端から軸方向の所定範囲における内端位置において外周面の全周にわたって軸直角方向内方に折り曲げられて径方向内方にわずかに延びる環状の段部65aに形成されると共に、段部65aの径方向内端位置にてさらに軸方向に平行になるように折り返された取付部65に形成されている。その他の構成については、符号を付して説明しないが、上記内筒金具11と同様である。
【0036】
このように、内筒金具61の取付部65が形成されていることにより、取付部65に上記ストッパ板部材20が挿嵌されて段部65aに当接した状態で、取付部65が径方向外方に折り曲げられ、折り曲げ部分がストッパ板部材20の中心穴22aの周囲に重ね合わされて重ね部65bに形成される。さらに、重ね部65bをストッパ板部材20に押圧して加締めることにより、重ね部65bがストッパ板部材20の溝部24に食い込んだ状態となり、両者の緊密な接触が形成される。その結果、第2実施形態においても、上記第1実施形態の効果と同様の効果が得られる。また、段部65a、取付部65及び重ね部65bについては内筒金具61の曲げ加工により形成されることで板厚が減少することになり、それに伴い重ね部65bによる締付け力が相対的に低下する。しかし、ストッパ板部材20の取付部65の重ね部65bとの当接面に線状の溝部24が設けられていることにより、板厚の減少をカバーすることができ、両者の緊密な接触が確保される。
【0037】
つぎに、第3実施形態について図12及び図13により説明する。
本実施形態は、上記第1実施形態における内筒金具11の取付部の形状を変更したものである。図12及び図13に示すように、内筒金具(内側筒部)71が、その外周面に重ね合わされた外側部材77(外側筒部)とにより一体に構成されている。外側部材77は、その上端が内側金具71の小径部72の上部開口端から軸方向に所定距離離れて配置されており、その上端が小径部72に対して段部77aになっている。小径部72の段部77aから開口端側に至る部分が取付部75になっている。その他の構成については、符号を付して説明しないが、上記内筒金具11と同様である。
【0038】
このように、内筒金具71の取付部75が形成されていることにより、取付部75にストッパ板部材20が挿嵌されて段部77aに当接した状態で、取付部75が径方向外方に折り曲げられて、ストッパ板部材20の中心穴22aの周囲に重ね合わされて重ね部75bに形成される。さらに、この重ね部75bをストッパ板部材20に押圧して加締めることにより、重ね部75bがストッパ板部材20の溝部24に食い込んだ状態となり、両者の緊密な接触が形成される。その結果、第3実施形態においても、上記第1実施形態の効果と同様の効果が得られる。また、外側部材77の上端が内筒金具71に対して段部77aになっていることから、外筒金具25とストッパ板部材20が当接する際に、軸方向にわずかなずれが生じて、ストッパ板部材20のゆるみが生じる可能性がある。しかし、ストッパ板部材20には取付部75の重ね部75bとの当接面に線状の溝部24が設けられて、両者の緊密な接触が確保されていることにより、ストッパ板部材20のゆるみを防止できる。
【0039】
なお、第2及び第3実施形態においても、ストッパ板部材20の底面部22の内側面に溝部24を設ける代わりに、底面部22の外側表面(図示下面)に溝部を設けてもよい。また、ストッパ板部材20の溝部24に加えて、内筒金具61,71の取付部65,75の重ね部65b,75b及び段部65a,77aの少なくとも一方にプレス加工あるいはショットブラスト加工による凹凸を設けてもよい
【0040】
なお、上記実施形態においては、本発明を、ショックアブソーバからの振動入力を内筒金具側のみで受け止めるいわゆる入力一体型のストラットマウントに適用した例を示しているが、これに代えてショックアブソーバからの振動入力を内筒金具及び外筒金具側で受け止めるいわゆる入力別体型のストラットマウントに適用することも可能である。また、ゴム弾性体部を、ゴム弾性体に代えて弾性体エラストマー等で形成してもよい。その他、上記実施形態に示したストラットマウントについては、一例であり、本発明の主旨を逸脱しない範囲において、種々の形態で実施することができる。
【0041】
【発明の効果】
上記請求項1の発明によれば、内筒金具の取付部の重ね部又は段部が当接するストッパ板部材の当接面に線状の溝を設けており、内筒金具より材質の硬いストッパ板部材が取付部との接触面に押付けられることにより、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となり、取付部とストッパ板部材との緊密な接触が形成され、ストッパ板部材が強固に内筒金具に固定される。また、取付部のストッパ板部材に対する押圧力が多少ばらついても、重ね部又は段部がストッパ板部材に設けた溝に十分に食い込んだ状態となるため、ストッパ板部材が安定して内筒金具に強固に固定される。
【0042】
その結果、サスペンション側からのリバウンド入力があった際に、取付部によるストッパ板部材の締付け部分での弛みを抑えることができ、ストッパ板部材が回転したり、内筒金具から脱落したりする不都合を確実に防止することができる。また、ストッパ板部材の回転に伴う、ストッパ板部材と内筒金具の接触による異音の発生を防止することができ、車両の乗り心地を改善することができる。さらに、取付部のストッパ板部材に対する押圧力が多少ばらついても、ストッパ板部材が安定して内筒金具に強固に固定されるため、ストッパ板部材の内筒金具への取付作業が容易になると共に作業の信頼性が高められる。また、ストッパ板部材の当接面に設けた線状の溝が、中心穴周囲の周方向複数個所に、中心穴から径方向に延びるように設けられることにより、ストッパ板部材と内筒金具が一層強固に固定される(請求項2の発明の効果)
【0043】
なお、内筒金具の取付部については、上部開口端から軸方向の所定範囲において外周面の全周にわたって軸心方向に所定厚さ削除されて薄肉とし、取付部外周面と他の部分の外周面との境界を段部とすることができる。また、上部開口端から軸方向の所定距離離れた位置において外周面の全周にわたって軸直角方向内方に折り曲げられて径方向内方にわずかに延びる環状の段部とし、段部の径方向内端位置にてさらに軸方向に平行になるように折り返されて取付部とすることもできる。さらに、内側筒部とその外周面に重ね合わされた外側筒部とにより一体に構成されており、外側筒部の上端が内側筒部の上部開口端から軸方向に所定距離離れて配置されてその上端を段部とし、内側筒部の段部から上端開口端に至る部分を取付部としてもよい。これらの構成によっても、請求項1,2の発明の効果が得られる(請求項3〜5の発明の効果)。
【図面の簡単な説明】
【図1】 本発明の第1実施形態であるストラットマウントの装着された車両のサスペンション部分を概略的に示す一部断面図である。
【図2】同ストラットマウントを示す図3のII−II線方向の断面図である。
【図3】同ストラットマウントを示す平面図である。
【図4】同ストラットマウントの内筒金具の取付部周囲を拡大して示す拡大断面図である。
【図5】同ストラットマウントにおいてストッパ板部材及びベアリングの取付前のゴム加硫成形品を示す縦断面図である。
【図6】ストッパ板部材を示す6A−6A線方向の断面図、底面図、6C−6C線方向の拡大図及び円6D内を詳細に示す拡大断面図である。
【図7】他の構成のストラットマウント概略的に示す断面図である。
【図8】 同ストラットマウントの装着された車両のサスペンション部分を概略的に示す一部断面図である。
【図9】参考例であるストッパ板部材を示す9A−9A線方向の断面図、底面図及び9C−9C線方向の拡大断面図である。
【図10】第2実施形態であるストラットマウントを示す断面図である。
【図11】同ストラットマウントの内筒金具の取付部周囲を拡大して示す拡大断面図である。
【図12】第3実施形態であるストラットマウントを示す断面図である。
【図13】同ストラットマウントの内筒金具の取付部周囲を拡大して示す拡大断面図である。
【符号の説明】
1…車体側部材、2…ショックアブソーバ、3…ピストンロッド、10…ストラットマウント、11…内筒金具、12…小径部、13…大径部、14…段差部、15…取付部、15a…段部、15b…重ね部、17…外側部材、20…ストッパ板部材、21…筒状部、22…底面部、22a…中心穴、24…溝部、24A…凹凸部、25…外筒金具、26…筒部、27…折返し部、28…フランジ部、31…ゴム弾性体部、41…内筒金具、42…本体、43…取付部、43a…重ね部、44…段部、61…内筒金具、62…小径部、65…取付部、65a…段部、65b…重ね部、71…内筒金具、72…小径部、75…取付部、75b…重ね部、77…外側部材、77a…段部。
[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a strut mount for a vehicle suspension that is interposed between a piston rod of a vehicle suspension, a vehicle body side member, and the like and that mitigates input vibrations that are transmitted from the suspension side to the vehicle body side through the piston rod.
[0002]
[Prior art]
  Conventionally, this type of strut mount 10A is, for example, as shown in FIG. 1, a bottomed cylindrical inner cylindrical metal member 11 and a stopper plate member that is a flat metal member fixed to the upper opening end of the inner cylindrical metal member 11. 20A, an outer cylinder fitting 25 coaxially disposed outside the inner cylinder fitting 11, and an elastic body portion 31 such as rubber that elastically connects between the inner cylinder fitting 11 and the outer cylinder fitting 25. The inner cylinder fitting 11 is coaxially fixed to the upper end of the piston rod 3 of the shock absorber 2 at the lower opening end side, and the outer cylinder fitting 25 is fixed to the vehicle body side member 1 at the flange portion 28. Yes.
[0003]
  As shown in FIGS. 2 and 4, the inner cylinder fitting 11 is a thin-walled attachment whose predetermined thickness is deleted in the axial direction over the entire outer peripheral surface in a range from the opening end side of the small diameter portion 12 to a predetermined position in the axial direction. The boundary between the outer peripheral surface of the attaching portion 15 and the outer peripheral surface of the other portion of the small diameter portion 12 is a step portion 15a. A stopper plate member 20A having a center hole 22a having an inner diameter substantially the same as the outer diameter of the mounting portion 15 is inserted into the mounting portion 15 through the center hole 22a and is in contact with the stepped portion 15a. The mounting portion 15 is bent radially outward and overlapped around the central hole 22a of the stopper plate member 20A, and the stopper plate member 20A is fixed to the inner cylindrical metal fitting 11 by pressing the overlapping portion and crimping. ing. According to the strut mount 10 </ b> A having such a configuration, vibration input that is to be propagated from the shock absorber 2 side to the vehicle body side through the piston rod 3 can be mitigated by the vibration absorbing action of the elastic body portion 31.
[0004]
[Problems to be solved by the invention]
  By the way, in the strut mount 10A, if the fastening of the bent inner cylinder fitting 11 to the stopper plate member 20A is weak, the rebound input from the piston rod 3 is generated at the upper end of the outer cylinder fitting 25. When input to the stopper plate member 20A through the provided elastic body portion, the mounting portion 15 is easily tightened. Therefore, there is a possibility that the stopper plate member 20 </ b> A rotates or the stopper plate member 20 </ b> A comes off from the inner cylinder fitting 11. Furthermore, the rotation of the stopper plate member 20A may cause abnormal noise due to the contact between the stopper plate member 20A and the inner cylinder fitting 11 at the contact surface, which may cause discomfort to the vehicle occupant.
[0005]
  The present invention is intended to solve the above-described problems, and provides a strut mount for a vehicle suspension capable of preventing the rotation of a stopper plate member and falling off from an inner cylindrical metal fitting and suppressing the occurrence of abnormal noise. With the goal.
[0006]
[Means for Solving the Problems]
  In order to achieve the above object, the structural feature of the invention described in claim 1 is that the entire outer peripheral surface in the range from the upper opening end to a predetermined position in the axial direction is a center of a cylindrical metal fitting. An inner cylinder fitting that has a mounting portion that is recessed coaxially in the direction, the boundary between the outer peripheral surface of the attachment portion and the outer peripheral surface of the other part is a stepped portion, and a flat fitting that is an inner cylinder It has a center hole with the same inner diameter as the outer diameter of the mounting part of the metal fitting, and the mounting part is radially outward with the center hole being inserted into the outer peripheral surface of the mounting part and in contact with the stepped part. A stopper plate member that is bent and overlapped around the center hole and pressed by the overlapped overlapping portion, and is disposed coaxially on the outer side of the inner cylinder fitting and is excessively large Axial direction by contacting the stopper plate member with the stopper plate member against the vibration input A cylindrical outer cylinder fitting that is restricted in movement, and a cylindrical elastic body portion that elastically connects between the inner cylinder fitting and the outer cylinder fitting. In the strut mount for a vehicle suspension that is coaxially fixed to the upper end portion of the shock absorber piston rod on the lower opening end side, and the outer cylinder bracket is fixed to the vehicle body side member,Inner tube bracketOverlap at the mounting partAlternatively, a linear groove is provided on the contact surface of the stopper plate member with which the step portion contacts, and the material of the stopper plate member is harder than the material of the inner cylinder fittingThere is.
[0007]
  In invention of Claim 1 comprised as mentioned above, the overlap part of the attaching part in an inner cylinder metal fittingOrStopper plate member that contacts the stepA linear groove is provided on the contact surface. Therefore, with the stopper plate member inserted in the center hole on the outer peripheral side of the mounting portion and in contact with the stepped portion, the mounting portion is bent radially outward and overlapped around the central hole of the stopper plate member , By pressing the overlapping part of the overlapping mounting part and caulking,The overlapped part or stepped part is sufficiently cut into the groove provided in the stopper plate member, and the mounting part and the stopper plate memberAn intimate contact is formed between them. For this reason, the stopper plate member is firmly fixed to the inner cylinder fitting, and even when receiving a rebound input from the suspension side, it is possible to suppress loosening at the tightening portion of the mounting portion with respect to the stopper plate member.
[0008]
  Also, if the pressing force applied to the stopper plate member varies due to the mounting part of the inner cylinder bracket, the contact surface of the stopper plate memberWith a linear grooveIf not, loosening is likely to occur between the mounting part of the inner tube bracket and the stopper plate member,Has a linear grooveEven if the pressing force varies slightly,The overlapped or stepped portion is a linear groove on the contact surface with the stopper plate member.It will be in a state of being devoured. Therefore, it is possible to suppress the occurrence of slack between the attachment portion of the inner cylinder fitting and the stopper plate member, and it is possible to stably maintain the fixed state of the stopper plate member by the inner cylinder fitting.Further, it is possible to easily form the groove in the stopper plate member as compared with the case where the groove is formed in the overlapping portion or the step portion of the attachment portion..
[0009]
  In addition, since the material of the stopper plate member is harder than the material of the inner cylinder fitting, the mounting portion is bent radially outward and pressed around the center hole of the stopper plate member by the overlapped portion and crimped. Sometimes, the contact surface between the stopper plate member and the overlapped portion or the stepped portion is more strongly bitten into the linear groove of the overlapped portion or the stepped portion, and a closer contact between the two is formed..
[0010]
  The structural feature of the invention according to claim 2 is the strut mount according to claim 1,Linear grooves provided on the contact surface of the stopper plate member were provided at a plurality of locations in the circumferential direction around the center hole so as to extend in the radial direction from the center hole.There is.
[0011]
  Also, aboveClaim 3The structural features of the invention described in claim 1 are as follows.1 or 2In the strut mount described in the above, the mounting portion of the inner cylindrical metal fitting is formed by thinning a predetermined thickness in the axial direction over the entire outer peripheral surface in a range from the upper opening end to a predetermined position in the axial direction. The boundary between the outer peripheral surface of the mounting portion and the outer peripheral surface of the other portion is a stepped portion.
[0012]
  the aboveClaim 3In this invention, with the stopper plate member inserted into the mounting portion of the inner cylindrical metal fitting and in contact with the stepped portion, the mounting portion is bent radially outward and overlapped around the central hole of the stopper plate member. , When pressing the overlapped overlapping part and caulking,The overlapped part or stepped part is sufficiently cut into the groove provided in the stopper plate member, and the mounting part and the stopper plate memberIntimate contact is formed. In addition, since the attachment portion is made thin, bending can be facilitated and the weight of the inner cylinder fitting can be reduced.
[0013]
  Also, aboveClaim 4The structural features of the invention described in claim 1 are as follows.1 or 2The strut mount according to claim 1, wherein the inner cylindrical metal fitting is bent inward in a direction perpendicular to the axis over the entire circumference of the outer peripheral surface at a position away from the upper opening end in the axial direction and slightly extends radially inward. And is formed at the attachment portion by being folded back so as to be parallel to the axial direction at the radially inner end position of the step portion.
[0014]
  the aboveClaim 4In this invention, with the stopper plate member inserted into the mounting portion of the inner cylindrical metal fitting and in contact with the stepped portion, the mounting portion is bent radially outward and overlapped around the central hole of the stopper plate member. , When pressing the overlapped overlapping part and caulking,The overlapped part or stepped part is sufficiently cut into the groove provided in the stopper plate member, and the mounting part and the stopper plate memberIntimate contact is formed. In addition, the stepped portion, the mounting portion and the overlapping portion are formed by bending the inner cylindrical metal fitting, so that the plate thickness is reduced. ElementThere is a linear groove on the abutment surface of the mounting partBy being provided, the reduction of the plate thickness can be covered, and intimate contact between the two is ensured.
[0015]
  Also, aboveClaim 5The structural features of the invention described in claim 1 are as follows.1 or 2In the strut mount according to claim 1, the inner cylinder fitting is integrally formed by the inner cylinder part and the outer cylinder part superimposed on the outer peripheral surface of the inner cylinder part, and the upper end of the outer cylinder part is the upper opening of the inner cylinder part. It is arranged at a predetermined distance from the end in the axial direction, and the upper end of the outer cylindrical portion is a stepped portion with respect to the inner cylindrical portion, and the portion from the stepped portion of the inner cylindrical portion to the upper end opening end is the mounting portion. There is to be.
[0016]
  the aboveClaim 5In this invention, with the stopper plate member inserted into the attachment portion of the inner cylinder fitting and in contact with the step portion of the outer cylinder portion, the attachment portion on the distal end side of the inner cylinder portion is bent radially outward. When it is overlapped around the center hole of the stopper plate member and the overlapped part is pressed and crimped,The overlapped part or stepped part is sufficiently cut into the groove provided in the stopper plate member, and the mounting part and the stopper plate memberIntimate contact is formed. In addition, since the upper end of the outer cylindrical portion is a stepped portion with respect to the inner cylindrical portion, a slight shift occurs in the axial direction when the outer cylindrical fitting and the stopper plate member come into contact with each other. Looseness may occur. However, the stopper plate memberA linear groove on the contact surface with the overlapping or stepped portion ofBy being provided and ensuring intimate contact between the two, the stopper plate member can be prevented from loosening.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a state in which a strut mount 10 for a vehicle suspension according to a first embodiment is interposed between a piston rod 3 of a shock absorber 2 and a vehicle body side member 1. 2 to 4 show the strut mount 10 in a cross-sectional view, a plan view, and a main-part cross-sectional view. 5 shows a vulcanized molded product M constituting the strut mount 10 in a sectional view, and FIG. 6 shows a stopper plate member in a sectional view and the like.
[0018]
  The strut mount 10 includes a cylindrical inner cylinder 11 made of a thick metal plate (for example, SPHE), a disk-shaped stopper plate member 20 fixed to the upper end side of the inner cylinder 11, and an outer side of the inner cylinder 11. The outer cylinder fitting 25 is coaxially arranged on the side, and the rubber elastic body portion 31 that elastically connects between the inner cylinder fitting 11 and the outer cylinder fitting 25. Hereinafter, the vehicle body side on which the strut mount 10 is mounted will be described as an upper side, and the suspension side will be described as a lower side.
[0019]
  As shown in FIG. 5, the inner cylinder fitting 11 has a cylindrical small-diameter portion 12 and a large-diameter portion 13 slightly larger in diameter than the small-diameter portion 12 on the upper and lower sides in the axial direction. It is part 14. The small-diameter portion 12 is a thin attachment portion 15 in which a predetermined length portion in the axial direction from the upper end opening 12a is deleted in the radial direction over the entire outer peripheral surface to form a thin attachment portion 15, and the outer periphery of the attachment portion 15 A boundary between the surface and the outer peripheral surface of the other portion of the small diameter portion 12 is a step portion 15a. The lower end of the large-diameter portion 13 is a flange portion 13a that extends slightly toward the axial center. A cylindrical ball bearing 16 is closely and coaxially inserted into the large diameter portion 13 and is held in the large diameter portion 13 by a flange portion 13a. As shown in FIG. 1, a spring seat 6 for receiving the coil spring 4 of the shock absorber 2 is attached to the exposed surface from the opening of the flange portion 13 a of the bearing 16. The spring seat 6 has a conical cylindrical shape like an outer member 17 described later, and the outer peripheral side is a flat receiving portion that receives the coil spring 4 via the dust cover 5.
[0020]
  Further, on the outer side in the radial direction of the large-diameter portion 13, a substantially conical outer member 17 made of a metal plate and slightly recessed in the axial direction as a whole is coaxially disposed. The side is an engagement portion 18 having a slightly reduced diameter. In the outer member 17, the engaging portion 18 is engaged with the position of the step portion 14 between the small diameter portion 12 and the large diameter portion 13, and the lower end thereof extends slightly below the lower end of the large diameter portion 13 in the axial direction. Has been placed. The outer member 17 is fixed to the small diameter portion 12 by welding or the like at the step portion 14 position at the engaging portion 18.
[0021]
  As shown in FIG. 6, the stopper plate member 20 is a flat circular container shape made of a thick metal plate and having an open top surface, and is provided with a cylindrical portion 21 having an inverted conical surface shape with a short axial length. An annular bottom surface 22 extending slightly inward in the radial direction is integrally provided at the lower end. Further, an annular flange 23 is integrally provided on the entire circumference of the upper end of the cylindrical portion 21 so as to extend radially outward with respect to the shaft center. A central hole 22 a is provided at the inner concentric position of the bottom surface portion 22, and the inner diameter thereof is slightly larger than the outer diameter of the mounting portion 15. Each boundary between the cylindrical portion 21 and the bottom surface portion 22 and between the cylindrical portion 21 and the flange portion 23 is an arcuate curved surface.
[0022]
  Further, on the inner surface (the upper surface in the drawing) of the bottom surface portion 22, a plurality of circumferential positions around the center hole 22a extend in the radial direction from the center hole 22a.It is a linear grooveA groove portion 24 is provided. As shown in enlarged views in FIGS. 6C and 6D, the groove portion 24 is a concave portion having an inverted triangular cross section, and its radial end is substantially equal to the outer peripheral position of the overlapping portion 15b of the mounting portion 15 to be described later. The length is such that As for the material of the stopper plate member 20, it is preferable to use a material that is harder than SPHE, which is the material of the inner cylinder fitting 11, such as SAPH440. The stopper plate member 20 is formed into an overall shape by drawing and pressing a metal disk, and a center hole 22a is formed by punching the center of the bottom surface portion 22 by punching. When the stopper plate member 20 is formed by pressing, the groove 24 is also formed at the same time.
[0023]
  The outer cylinder fitting 25 is formed by drawing, pressing, or the like of a single metal plate. The outer cylinder fitting 25 is folded back outward over the entire circumference at the upper end of the cylindrical part 26 and the cylindrical part 26. 26 is formed by a folded portion 27 that extends to substantially the middle in the axial direction and is overlapped with the cylindrical portion 26, and a flat flange portion 28 that extends in the radial direction from the lower end portion of the folded portion 27 over the entire circumference. The outer diameter of the lower end of the cylindrical portion 26 is slightly smaller than the outer diameter of the outer member 17. In other words, the lower end portion of the outer member 17 functions as a stopper for the outer cylinder fitting 25.
[0024]
  As shown in FIG. 3, the outer shape of the flange portion 28 has an irregular shape in which each apex of a substantially equilateral triangle shape is cut out in an arc shape in plan view. The flange portion 28 is provided with a mounting hole 28a at a substantially central position of a predetermined region corresponding to the apex of the substantially equilateral triangle. In addition, a vertical portion 29 is provided at a peripheral position of the flange portion 28 so as to extend slightly perpendicular to the flange portion and in a direction opposite to the folded portion 27.
[0025]
  As shown in FIGS. 2 and 5, the rubber elastic body portion 31 is located at a position in the vicinity of the outer peripheral edge of the lower end of the outer fitting 17 slightly from the lower side in the axial direction on the outer circumferential surface of the small diameter portion 12 of the inner cylindrical fitting 11. It is arrange | positioned over the circumferential direction perimeter between the range between, and the cylinder part 26 whole surface of the outer cylinder metal fitting 25, and the both metal fittings 11 and 25 are connected elastically. Further, a part of the rubber elastic body portion 31 is a protruding portion 32 that protrudes above the cylindrical portion 26. The protruding portion 32 is in contact with the flange portion 23 of the stopper plate member 20 attached to the inner cylindrical metal member 11 in a compressed state. The rubber elastic body portion 31 is integrally formed as a rubber vulcanized molded product M, which is an intermediate product shown in FIG. 5, by setting the inner cylinder fitting 11 and the outer cylinder fitting 25 in a molding die and performing rubber vulcanization molding. Molded with.
[0026]
  In the inner cylinder 11 of the rubber vulcanized molded product M, a bearing 16 is inserted into the large-diameter portion 13, and then the lower end of the large-diameter portion 13 is bent in the axial direction by drawing to form a flange portion 13a. By doing so, the bearing 16 is held in the large diameter portion 13. Next, with respect to the attachment of the stopper plate member 20 to the inner cylindrical metal fitting 11, first, the stopper plate member 20 is fitted to the outer peripheral side of the attachment portion 15 through the center hole 22a from the bottom surface portion 22 side to the step portion 15a. Place. In this state, as shown in detail in FIG. 4, the attaching portion 15 is drawn and bent outward, and the overlapping portion 15 b on the distal end side of the attaching portion 15 is overlapped with the stopper plate member 20. The outer peripheral position of the overlapping portion 15 b extends from the outer peripheral surface of the small diameter portion 12 to a radially outer position. Further, the stopper plate member 20 is fixed to the mounting portion 15 of the inner cylindrical metal member 11 by pressing the overlapping portion 15 b and crimping to the stopper plate member 20, thereby forming the strut mount 10.
[0027]
  Here, the groove portion 24 is formed by press working on the contact surface of the stopper plate member 20 that contacts the overlapping portion 15b, and the stopper plate member 20 is formed of a material harder than the material of the inner cylinder fitting 11. ing. Therefore, when the periphery of the center hole 22 a of the stopper plate member 20 is pressed by the overlapping portion 15 b, the overlapping portion 15 b is in a state of biting into the groove portion 24 of the stopper plate member 20. Further, the overlapping position of the overlapping portion 15b and the groove portion 24 is radially outward from the outer periphery of the small diameter portion 12, and the contact area between the two is widened. Therefore, intimate contact is formed between the stopper plate member 20 and the overlapping portion 15b, and the stopper plate member 20 is firmly fixed to the small diameter portion 12.
[0028]
  The assembly of the strut mount 10 to the vehicle is performed as follows. As shown in FIG. 1, the strut mount 10 is inserted into the opening 1 a of the vehicle body side member 1 from below, and the bolt 35 is inserted at the position of the mounting hole 28 a of the flange portion 28 of the outer cylinder fitting 25. The flange portion 28 is fixed to the vehicle body side member 1 by screwing the nut 36 onto the bolt 35 protruding from the vehicle body side. Further, the tip of the piston rod 3 of the shock absorber 2 attached to the wheel 7 is inserted into the shaft hole of the bearing 16 of the strut mount 10, and the nut 3 a is screwed onto the tip screw portion of the piston rod 3 protruding from the bearing 16. By doing so, the piston rod 3 is fixed to the strut mount 10.
[0029]
  In the embodiment configured as described above, the groove portion 24 is provided around the center hole 22 a on the inner surface of the bottom surface portion 22 of the stopper plate member 20, so that the step portion 15 a is formed by the overlapping portion 15 b of the attachment portion 15. The pressed stopper plate member 20 is in a state in which the overlapping portion 15b is firmly bitten into the groove portion 24, and a close contact is formed with the overlapping portion 15b. Therefore, the stopper plate member 20 is firmly fixed to the inner cylinder fitting 11. Further, since the material of the stopper plate member 20 is harder than the material of the inner cylinder fitting 11, the biting of the overlapping portion 15b into the groove portion 24 is performed more strongly, and the stopper plate member 20 is more firmly attached to the inner cylinder fitting 11. It becomes a fixed state.
[0030]
  As a result, according to the present embodiment, even when rebound input from the shock absorber 2 is received, it is possible to suppress loosening at the tightening portion of the stopper plate member 20 by the mounting portion 15, and the stopper plate member 20 rotates. In addition, it is possible to reliably prevent the inconvenience of falling off from the inner cylinder fitting 11. Further, it is possible to prevent the generation of noise due to the contact between the stopper plate member 20 and the inner cylindrical metal fitting 11 due to the rotation of the stopper plate member 20, and the riding comfort of the vehicle can be improved. Moreover, by making the attachment part 15 thin, bending work becomes easy and the weight of the inner cylinder metal fitting 11 can be reduced.
[0031]
  The strut mount is not limited to that shown in the above embodiment, and may have a structure shown in FIG. The strut mount 40 includes a cylindrical inner cylinder fitting 41, the stopper plate member 20 fixed to the upper end side thereof, an outer cylinder fitting 51 arranged coaxially on the outer side of the inner cylinder fitting 41, A rubber elastic body portion 55 that elastically connects between the tubular fitting 41 and the outer tubular fitting 51 is provided.
[0032]
  The inner cylinder fitting 41 includes a bottomed cylindrical main body 42 and a receiving member 45 fixed to the bottom thereof. Attachment holes for attaching piston rods are formed in the bottom surface of the main body 42 and the receiving member 45, respectively. A thin attachment portion 43 formed by cutting the outer peripheral surface side by cutting is provided on the upper end side of the main body 42, and the outer peripheral side boundary between the attachment portion 43 and other portions is a stepped portion 44. ing. Similarly to the embodiment described above, the stopper plate member 20 is placed on the stepped portion 44 of the main body 42, and the mounting portion 43 is folded outwardly in the radial direction, and is pressed by the overlapping portion 43a. Thus, the main body 42 is fixed. The outer cylinder fitting 51 has a cylindrical surface portion 52 having a conical surface slightly inclined in the diameter increasing direction from the upper side to the lower side, and a lower end portion of the cylindrical portion 52 is slightly with respect to the axis. An annular flange portion 53 that extends outward in the radial direction in a state of being inclined in the direction is provided. The strut mount 40 is also assembled between the vehicle body side member 1 and the upper end of the piston rod 3 of the shock absorber 2 as shown in FIG. The strut mount 40 also has the same effect as that obtained in the strut mount 10 by using the stopper plate member 20.
[0033]
  In the above-described embodiment, the groove portion 24 is provided on the inner side surface of the bottom surface portion 22 of the stopper plate member 20, but a groove portion may be provided on the outer surface (lower surface in the drawing) of the bottom surface portion 22 instead. Further, in addition to providing the groove portion 24 in the stopper plate member 20, at least one of the overlapping portions 15b, 43a and the step portions 15a, 44 of the mounting portions 15, 43 in the inner cylinder fittings 11, 41 is pressed or shot blasted. Even with unevenness due toGood.
[0034]
  Next, the stopper plate member 20Reference exampleAs shown in FIG. 9, on the outer surface (the lower surface in the drawing) of the bottom surface portion 22, an uneven portion 24 </ b> A may be provided in a belt shape around the center hole 22 a around the entire circumference. The uneven portions 24A are regularly formed with small protrusions 24B as shown in an enlarged view in FIG. The uneven portion may be formed by shot blasting instead of pressing. Further, in addition to or instead of the uneven portion 24A on the outer surface (the lower surface in the drawing) of the bottom surface portion 22, an uneven portion is provided in the form of a belt around the central hole 22a around the inner surface (the upper surface in the drawing) of the bottom surface portion 22 in the circumferential direction. May be. By adopting the stopper plate member 20, the same effect as that shown in the above embodiment can be obtained.
[0035]
  Next, a second embodiment will be described with reference to FIGS.
  In the present embodiment, the shape of the mounting portion of the inner cylinder fitting 11 in the first embodiment is changed. As shown in FIGS. 10 and 11, the inner tubular fitting 61 is bent inward in the direction perpendicular to the axis over the entire circumference of the outer peripheral surface at the inner end position in the predetermined range in the axial direction from the upper opening end of the small diameter portion 62. It is formed in an annular step portion 65a that extends slightly inward in the direction, and is formed in a mounting portion 65 that is folded back so as to be parallel to the axial direction at the radially inner end position of the step portion 65a. Other configurations are not described with reference numerals, but are the same as those of the inner cylinder fitting 11.
[0036]
  As described above, since the mounting portion 65 of the inner cylinder fitting 61 is formed, the mounting portion 65 is in the radial direction in a state where the stopper plate member 20 is inserted into the mounting portion 65 and is in contact with the stepped portion 65a. It is bent outward, and the bent portion is overlapped around the center hole 22a of the stopper plate member 20 to form the overlap portion 65b. Furthermore, by pressing and crimping the overlapping portion 65b against the stopper plate member 20, the overlapping portion 65b is bitten into the groove portion 24 of the stopper plate member 20, and an intimate contact between them is formed. As a result, also in the second embodiment, the same effect as that of the first embodiment can be obtained. Further, the stepped portion 65a, the mounting portion 65, and the overlapping portion 65b are formed by bending the inner cylinder fitting 61, so that the plate thickness is reduced, and accordingly, the tightening force by the overlapping portion 65b is relatively reduced. To do. But,Of the stopper plate member 20Of the mounting part 65A linear groove 24 on the contact surface with the overlapping portion 65b.By being provided, it is possible to cover the reduction of the plate thickness and to ensure close contact between the two.
[0037]
  Next, a third embodiment will be described with reference to FIGS.
  In the present embodiment, the shape of the mounting portion of the inner cylinder fitting 11 in the first embodiment is changed. As shown in FIGS. 12 and 13, an inner cylinder fitting (inner cylinder part) 71 is integrally formed with an outer member 77 (outer cylinder part) superimposed on the outer peripheral surface thereof. The upper end of the outer member 77 is disposed at a predetermined distance in the axial direction from the upper opening end of the small diameter portion 72 of the inner metal member 71, and the upper end thereof is a stepped portion 77 a with respect to the small diameter portion 72. A portion from the stepped portion 77 a of the small diameter portion 72 to the opening end side is an attachment portion 75. Other configurations are not described with reference numerals, but are the same as those of the inner cylinder fitting 11.
[0038]
  As described above, the attachment portion 75 of the inner cylindrical metal member 71 is formed, so that the attachment portion 75 is radially outside in a state where the stopper plate member 20 is inserted into the attachment portion 75 and is in contact with the stepped portion 77a. And is overlapped around the center hole 22a of the stopper plate member 20 to form the overlap portion 75b. Further, by pressing and crimping the overlapped portion 75b against the stopper plate member 20, the overlapped portion 75b is in a state of biting into the groove portion 24 of the stopper plate member 20, and a close contact between them is formed. As a result, also in the third embodiment, the same effect as that of the first embodiment can be obtained. Further, since the upper end of the outer member 77 is a stepped portion 77a with respect to the inner cylinder fitting 71, when the outer cylinder fitting 25 and the stopper plate member 20 come into contact with each other, a slight deviation occurs in the axial direction, There is a possibility that the stopper plate member 20 is loosened. But,The stopper plate member 20Of mounting part 75The linear groove portion 24 is formed on the contact surface with the overlapping portion 75b.By being provided and ensuring close contact between the two, the stopper plate member 20 can be prevented from loosening.
[0039]
  In the second and third embodiments, instead of providing the groove portion 24 on the inner surface of the bottom surface portion 22 of the stopper plate member 20, a groove portion may be provided on the outer surface (the lower surface in the drawing) of the bottom surface portion 22. Further, the stopper plate member 20In addition to the groove portion 24, at least one of the overlapping portions 65b and 75b and the step portions 65a and 77a of the mounting portions 65 and 75 of the inner cylinder fittings 61 and 71 may be provided with unevenness by press working or shot blasting..
[0040]
  In the above embodiment, the present invention is applied to a so-called input-integrated strut mount in which the vibration input from the shock absorber is received only on the inner cylinder bracket side. It is also possible to apply this to a so-called separate input type strut mount that receives the vibration input at the inner cylinder fitting and the outer cylinder fitting. Further, the rubber elastic body portion may be formed of an elastic elastomer or the like instead of the rubber elastic body. In addition, the strut mount shown in the above embodiment is an example, and can be implemented in various forms without departing from the gist of the present invention.
[0041]
【The invention's effect】
  According to the invention of claim 1 above,A linear groove is provided on the contact surface of the stopper plate member with which the overlapping portion or stepped portion of the mounting portion of the inner cylinder fitting comes into contact, and the stopper plate member made of a material harder than the inner cylinder fitting is on the contact surface with the attachment portion. By being pressed, the overlapped portion or stepped portion is sufficiently in the groove provided in the stopper plate member, and the attachment portion and the stopper plate memberClose contact is formed, and the stopper plate member is firmly fixed to the inner cylinder fitting. In addition, even if the pressing force against the stopper plate member of the mounting part varies somewhat,The overlapped or stepped part is sufficiently in the groove provided in the stopper plate member.Since it is in a state of being bitten, the stopper plate member is stably and firmly fixed to the inner cylinder fitting.
[0042]
  As a result, when there is rebound input from the suspension side, it is possible to suppress loosening at the fastening portion of the stopper plate member by the mounting portion, and the stopper plate member rotates or falls off the inner cylinder fitting. Can be reliably prevented. Further, it is possible to prevent the generation of noise due to the contact between the stopper plate member and the inner cylinder fitting accompanying the rotation of the stopper plate member, and to improve the riding comfort of the vehicle. Furthermore, even if the pressing force of the mounting portion against the stopper plate member varies somewhat, the stopper plate member is stably and firmly fixed to the inner cylinder fitting, so that the stopper plate member can be easily attached to the inner cylinder fitting. At the same time, work reliability is improved.Further, the linear groove provided on the contact surface of the stopper plate member is provided at a plurality of circumferential positions around the central hole so as to extend in the radial direction from the central hole, so that the stopper plate member and the inner cylindrical metal fitting are provided. Further firmly fixed (Effect of the invention of claim 2).
[0043]
  In addition, about the attachment part of an inner cylinder metal fitting, a predetermined thickness is deleted in the axial direction over the perimeter of an outer peripheral surface in the predetermined range of an axial direction from an upper opening end, and it is thin, and the outer periphery of an attachment part outer peripheral surface and other parts The boundary with the surface can be a step. In addition, an annular step portion that is bent inward in the direction perpendicular to the axis over the entire circumference of the outer peripheral surface at a position that is a predetermined distance in the axial direction from the upper opening end is formed as an annular step portion that extends slightly inward in the radial direction. It can be folded back so as to be parallel to the axial direction at the end position to form an attachment portion. Further, the inner cylinder part and the outer cylinder part overlapped on the outer peripheral surface thereof are integrally formed, and the upper end of the outer cylinder part is disposed at a predetermined distance in the axial direction from the upper opening end of the inner cylinder part. The upper end may be a step portion, and the portion from the step portion of the inner cylinder portion to the upper end opening end may be the attachment portion. With these configurations,Claims 1, 2The effect of the invention can be obtained (Claims 3-5Effect of the invention).
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view schematically showing a suspension portion of a vehicle mounted with a strut mount according to a first embodiment of the present invention.
2 is a cross-sectional view taken along the line II-II of FIG. 3 showing the strut mount.
FIG. 3 is a plan view showing the strut mount.
FIG. 4 is an enlarged cross-sectional view showing an enlargement of the periphery of the mounting portion of the inner cylinder fitting of the strut mount.
FIG. 5 is a longitudinal sectional view showing a rubber vulcanized molded product before the stopper plate member and the bearing are attached in the strut mount.
6A and 6B are a cross-sectional view, a bottom view, an enlarged view of a 6C-6C line direction, and an enlarged cross-sectional view showing details in a circle 6D showing a stopper plate member.
FIG. 7 is a cross-sectional view schematically showing a strut mount of another configuration.
FIG. 8 is a partial cross-sectional view schematically showing a suspension portion of a vehicle to which the strut mount is attached.
FIG. 9Reference exampleIt is sectional drawing of the 9A-9A line direction which shows the stopper board member which is these, a bottom view, and an expanded sectional view of the 9C-9C line direction.
FIG. 10 is a cross-sectional view showing a strut mount according to a second embodiment.
FIG. 11 is an enlarged cross-sectional view showing the periphery of the mounting portion of the inner cylinder fitting of the strut mount in an enlarged manner.
FIG. 12 is a cross-sectional view showing a strut mount according to a third embodiment.
FIG. 13 is an enlarged cross-sectional view showing the periphery of the mounting portion of the inner cylinder fitting of the strut mount in an enlarged manner.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Car body side member, 2 ... Shock absorber, 3 ... Piston rod, 10 ... Strut mount, 11 ... Inner cylinder metal fitting, 12 ... Small diameter part, 13 ... Large diameter part, 14 ... Step part, 15 ... Mounting part, 15a ... Step part, 15b ... Overlapping part, 17 ... Outer member, 20 ... Stopper plate member, 21 ... Cylindrical part, 22 ... Bottom part, 22a ... Center hole, 24 ... Groove part, 24A ... Uneven part, 25 ... Outer cylinder fitting, 26 ... Cylinder part, 27 ... Folded part, 28 ... Flange part, 31 ... Rubber elastic body part, 41 ... Inner cylinder bracket, 42 ... Main body, 43 ... Mounting part, 43a ... Overlapping part, 44 ... Step part, 61 ... Inside Cylinder fitting 62 ... small diameter part 65 ... attachment part 65a ... step part 65b ... overlapping part 71 ... inner cylinder fitting 72 ... small diameter part 75 ... attachment part 75b ... overlapping part 77 ... outer member 77a ... Stepped.

Claims (5)

筒状の金具であってその上部開口端から軸方向の所定位置に至る範囲の外周面全面が軸心方向に同軸状に凹んだ取付部になっており、該取付部の外周面と他の部分の外周面との境界が段部になっている内筒金具と、
偏平状の金具であって前記内筒金具の取付部の外径と略同一内径の中心穴を有し、該中心穴にて前記取付部の外周面側に挿嵌されて前記段部に当接した状態で、前記取付部が径方向外方に折り曲げられて前記中心穴の周囲に重ね合わされ、該重ね合わされた重ね部によって押圧されることにより前記内筒金具に固着されたストッパ板部材と、
前記内筒金具の外方に同軸状に配置されると共に過大な振動入力に対して前記ストッパ板部材との対向端部が該ストッパ板部材に当接することにより軸方向の動きが制限されるようになっている筒状の外筒金具と、
前記内筒金具と外筒金具との間を弾性的に連結する筒状の弾性体部と
を設けてなり、前記内筒金具が下部開口端側にてショックアブソーバのピストンロッドの上端部に同軸状に固定され、前記外筒金具が車体側部材に固定される車両サスペンション用のストラットマウントにおいて、
前記内筒金具の取付部における前記重ね部又は前記段部が当接する前記ストッパ板部材の当接面に線状の溝を設け、
前記ストッパ板部材の材質の方が、前記内筒金具の材質より硬いことを特徴とするストラットマウント。
It is a cylindrical fitting, and the entire outer peripheral surface in the range from the upper opening end to a predetermined position in the axial direction is a mounting portion that is coaxially recessed in the axial direction. An inner tube fitting whose boundary with the outer peripheral surface of the part is a step,
A flat-shaped metal fitting having a central hole having an inner diameter substantially the same as the outer diameter of the mounting portion of the inner cylindrical metal fitting, and is inserted into the outer peripheral surface side of the mounting portion through the central hole and contacts the stepped portion. A stopper plate member fixed to the inner cylinder metal fitting by being bent radially outwardly and being superimposed on the periphery of the center hole and being pressed by the overlapped overlapping portion in a state of contact; ,
It is arranged coaxially on the outer side of the inner cylindrical metal fitting, and the axial movement is restricted by the end facing the stopper plate member coming into contact with the stopper plate member against excessive vibration input. A cylindrical outer tube fitting that is
A cylindrical elastic body portion that elastically connects between the inner cylinder fitting and the outer cylinder fitting is provided, and the inner cylinder fitting is coaxial with the upper end of the piston rod of the shock absorber at the lower opening end side. In a strut mount for a vehicle suspension in which the outer cylinder fitting is fixed to a vehicle body side member,
A linear groove is provided on the contact surface of the stopper plate member with which the overlapped portion or the stepped portion of the mounting portion of the inner cylinder fitting contacts,
A strut mount, wherein the stopper plate member is harder than the inner cylinder fitting .
前記ストッパ板部材の当接面に設けた線状の溝が、前記中心穴周囲の周方向複数個所に、該中心穴から径方向に延びるように設けられたことを特徴とする前記請求項1に記載のストラットマウント。 2. The linear groove provided on the contact surface of the stopper plate member is provided at a plurality of circumferential locations around the center hole so as to extend radially from the center hole. The strut mount described in 1. 前記内筒金具の取付部が、前記上部開口端から軸方向の所定位置に至る範囲の外周面全面にわたって軸心方向に所定厚さ削除されて薄肉に形成されたものであり、該取付部の外周面と他の部分の外周面との境界が前記段部になっていることを特徴とする前記請求項1又は2に記載のストラットマウント。The mounting portion of the inner cylinder fitting is formed by thinning a predetermined thickness in the axial direction over the entire outer peripheral surface in a range from the upper opening end to a predetermined position in the axial direction. The strut mount according to claim 1 or 2 , wherein a boundary between the outer peripheral surface and the outer peripheral surface of another portion is the stepped portion. 前記内筒金具が、その上部開口端から軸方向の所定距離離れた位置において外周面の全周にわたって軸直角方向内方に折り曲げられて径方向内方にわずかに延びる前記段部に形成されると共に、該段部の径方向内端位置にてさらに軸方向に平行になるように折り返されて前記取付部に形成されていることを特徴とする前記請求項1又は2に記載のストラットマウント。The inner cylinder fitting is formed in the stepped portion that is bent inwardly in the direction perpendicular to the axis over the entire circumference of the outer peripheral surface at a position spaced apart from the upper opening end by a predetermined distance in the axial direction and slightly extends radially inward. The strut mount according to claim 1 or 2 , wherein the mounting portion is formed by being folded back at the radially inner end position of the step portion so as to be parallel to the axial direction. 前記内筒金具が、内側筒部と該内側筒部の外周面に重ね合わされた外側筒部とにより一体に構成されており、前記外側筒部の上端が前記内側筒部の上部開口端から軸方向に所定距離離れて配置されて該外側筒部の上端が該内側筒部に対して前記段部になっており、該内側筒部の該段部から上端開口端に至る部分が前記取付部になっていることを特徴とする前記請求項1又は2に記載のストラットマウント。The inner cylinder fitting is integrally formed by an inner cylinder part and an outer cylinder part superimposed on the outer peripheral surface of the inner cylinder part, and the upper end of the outer cylinder part is pivoted from the upper opening end of the inner cylinder part. The upper end of the outer cylindrical portion is arranged at a predetermined distance in the direction and is the stepped portion with respect to the inner cylindrical portion, and the portion of the inner cylindrical portion extending from the stepped portion to the upper end opening end is the mounting portion. The strut mount according to claim 1 or 2 , wherein the strut mount is configured as described above.
JP2001326700A 2001-02-08 2001-10-24 Strut mount Expired - Fee Related JP4025531B2 (en)

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