JP2004150596A

JP2004150596A - Flexible mounting device

Info

Publication number: JP2004150596A
Application number: JP2002318721A
Authority: JP
Inventors: Hiroaki Nagai; 廣明永井
Original assignee: Sumitomo Riko Co Ltd
Current assignee: Sumitomo Riko Co Ltd
Priority date: 2002-10-31
Filing date: 2002-10-31
Publication date: 2004-05-27

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible mounting device that improves and compatibly attains ride comfort and the controllability and stability of a vehicle. <P>SOLUTION: An outside mounting member 2 coaxially arranged outside an inside mounting member 1 has a mounting flange portion 22, a first outside cylindrical portion 23, a supporting portion 24, an inside cylindrical portion 25 and a second outside cylindrical portion 28. A first rubber elastic material 3 arranged outside the inside mounting member 1 in the state of being compressed and supported by a metal plate 31 and the outside mounting member 2 has a press-in portion 32 to be pressed in and held between the second outside cylindrical portion 28 and the inside cylindrical portion 25. A second rubber elastic material 4 arranged outside the inside mounting member 1 in the state of being compressed and supported by a flange portion 12 and the outside mounting member 2 has an intermediate cylindrical portion 41 and a small-diameter cylindrical portion 42 bonded to the outside mounting member 2 and arranged inside it. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、車両において、例えばキャブマウントやメンバマウント、ボディマウント等として採用される防振支持装置に関する。
【０００２】
【従来の技術】
従来より、例えばフルフレーム構造の車両においては、車体フレームにボディ（キャビン）を取付ける場合、そのボディが防振支持されるようにするためにキャブマウント等の防振支持装置が採用されている。このような防振支持装置として、図７に示すように、筒状に形成されてその両端にフランジ部１１２、１１２を有する内側取付部材１０１と、内側取付部材１０１の外側に距離を隔てて同軸状に配置され両フランジ部１１２、１１２の間に両フランジ部１１２、１１２と対向配置されるリング状の支持部１２４を有する外側取付部材１０２と、内側取付部材１０１と外側取付部材１０２との間に介装された第１ゴム弾性体１０３及び第２ゴム弾性体１０４とからなるものが知られている（例えば特許文献１参照。）。この防振支持装置においては、第１ゴム弾性体１０３は、内側部材１０１の外側に嵌め込まれその両端が一方のフランジ部１１２と支持部１２４とに固着されて軸方向に圧縮支持されるように配置されている。また、第２ゴム弾性体１０４は、内側部材１０１の外側に嵌め込まれるとともに、その一端が他方のフランジ部１１２に固着され、その他端が外側取付部材１０２の支持部１２４に圧接するようにして嵌め込まれることにより、軸方向において圧縮支持されるように配置されている。
【０００３】
この防振支持装置は、車体フレーム及びボディのいずれか一方に内側取付部材１０１が固定されるとともに、そのいずれか他方に外側取付部材１０２が固定されることにより、その軸方向が上下方向となるように取付けられて使用される。このようにして多数のキャブマウントが取付けられることによって、車体フレーム上にボディが防振支持された状態に取付けられる。
【０００４】
そして、エンジンの作動等に伴って車体フレーム側に振動が発生すると、その振動が第１及び第２ゴム弾性体１０３、１０４の主として圧縮方向の弾性変形を介して吸収されることにより、車体フレームからボディへと伝達される振動が効果的に低減される。即ち、低減を目的とする振動の周波数に合わせて第１及び第２ゴム弾性体１０３、１０４のばね特性を適宜設定することにより、乗員にとって不快音となるこもり音やボディがブルブルと震える不快振動等が効果的に低減される。これにより、車両の乗り心地が良好となる。また、車両の走行時等において発生する、車体フレームに対するボディのローリング（横揺れ）やピッチング（前後方向の揺れ）等も第１及び第２ゴム弾性体１０３、１０４の主として剪断方向の弾性変形により効果的に抑制される。これにより、車両の良好な操縦安定性が確保される。なお、操縦安定性を向上させるためには、第１及び第２ゴム弾性体１０３、１０４の車両左右方向におけるばね剛性が必要となる。
【０００５】
【特許文献１】
特開２００２−２３５７８４号公報
【０００６】
【発明が解決しようとする課題】
ところで、上記従来の防振支持装置においては、第１及び第２ゴム弾性体１０３、１０４が軸方向（上下方向）において圧縮支持されるように構成されていることから、主に圧縮方向となる軸方向の剛性が高くなる。そのため、第１及び第２ゴム弾性体１０３、１０４の径方向（車両の左右及び前後方向）における充分な剛性を確保することができない構造となっている。そのため、車両の走行時等に発生するローリングやピッチングを良好に抑制できるようにしたり、良好な操縦安定性を確保するために、第１及び第２ゴム弾性体１０３、１０４のばね特性をバランス良く設定することが困難となる。また、第２ゴム弾性体１０４は、その他端が外側取付部材１０２の支持部１２４に圧接するようにして嵌め込まれる構造となっていることから、内側取付部材１０１と外側取付部材１０２の間にこじり方向の微振動が入力したときに、第２ゴム弾性体１０４と外側取付部材１０２との間に微少なガタが発生し易い。即ち、その静ばね特性を示す図８のグラフにおいては、０点付近にガタが発生する状態となり、操縦安定性が悪化するという問題が発生する。
【０００７】
本発明は上記問題に鑑みてなされたものであり、車両の乗り心地と操縦安定性を向上させ両立させることができる防振支持装置を提供することを解決すべき課題とするものである。
【０００８】
【課題を解決するための手段、発明の作用及び効果】
上記課題を解決する請求項１記載の発明に係る防振支持装置は、筒状に形成された本体部と該本体部の一端に設けられたフランジ部とを有する内側取付部材と、該内側取付部材の径方向外側に距離を隔てて同軸状に配置される第１外側筒状部と該第１外側筒状部の前記フランジ部から遠い側の端部から径方向内方に延出して前記フランジ部と対向配置されるリング状の支持部と該支持部の内周端から前記フランジ部から遠ざかる方向に延出する内側筒状部と前記支持部の外周端から前記フランジ部から遠ざかる方向に延出する第２外側筒状部とを有する外側取付部材と、筒状に形成されて前記内側取付部材の前記本体部の外周に圧入により取付けられるとともに、前記内側取付部材の他端に配置されるプレートと前記外側取付部材とにより軸方向において圧縮支持されるように配置され、前記外側取付部材の前記内側筒状部と前記第２外側筒状部との間に圧入保持された圧入部を有する第１ゴム弾性体と、筒状に形成されて前記内側取付部材の前記本体部の外周に圧入により取付けられるとともに、前記フランジ部と前記外側取付部材とにより軸方向において圧縮支持されるように配置され、前記第１外側筒状部及び前記支持部に接着されて前記第１外側筒状部の内側に位置する中間筒部と前記内側筒状部に接着されて前記内側筒状部の内側に位置する小径筒部とを有する第２ゴム弾性体と、から構成されているという手段を採用している。
【０００９】
本発明の防振支持装置においては、第１ゴム弾性体が外側取付部材の内側筒状部と第２外側筒状部との間に圧入保持された圧入部を有することから、第１ゴム弾性体の径方向のばね剛性が高められる。また、第２ゴム弾性体は、第１外側筒状部の内側に位置する中間筒部と内側筒状部の内側に位置する小径筒部とを有することから、第２ゴム弾性体の径方向のばね剛性が高められる。これにより、第１及び第２ゴム弾性体の軸方向と径方向のばね特性をバランス良く設定することが可能となり、乗り心地の向上を図ることができる。
【００１０】
しかも、第２ゴム弾性体の中間筒部及び小径筒部は、外側取付部材の第１外側筒状部、支持部及び内側筒状部に接着されているため、内側取付部材と外側取付部材との間にこじり方向の微振動が入力したときにも、第２ゴム弾性体と外側取付部材との間に微少なガタが発生しないので、良好な操縦安定性が確保される。
【００１１】
なお、第１ゴム弾性体は、圧入部が外側取付部材の内側筒状部と第２外側筒状部との間に圧入保持されていることから、軸方向において外側取付部材とプレートとが遠ざかる方向に大きな振動が入力した際に、第１ゴム弾性体がプレートの動きに追従して変位するときには圧入部が外側取付部材の支持部から離れる方向に変位する。しかし、その後、外側取付部材とプレートとが近づく方向（リバウンド方向）に変位する際に、圧入部が再び外側取付部材の内側筒状部と第２外側取付部材との間で支持部に近づく方向に変位して元の状態に戻るため、第１ゴム弾性体の特性が変化することは少ない。
【００１２】
したがって、本発明の防振支持装置によれば、車両の乗り心地と操縦安定性を向上させ両立させることができる。
【００１３】
請求項２記載の発明に係る防振支持装置は、請求項１記載の発明における前記第２外側筒状部が、前記内側筒状部の延出先端を越える長さに形成されているという手段を採用している。
【００１４】
この手段によれば、第１ゴム弾性体は、第２外側筒状部の内側筒状部よりも突出した部分と内側取付部材とによって挟まれる部分を有するようになることから、第１ゴム弾性体の径方向のばね剛性を更に高めることが可能となる。
【００１５】
【発明の実施の形態】
以下、本発明の実施形態を図面に基づき説明する。
【００１６】
図１は本実施形態に係る防振支持装置の取付け状態（荷重負荷時）を示す軸方向に沿う断面図であり、図２はその係る防振支持装置の平面図である。
【００１７】
本実施形態の防振支持装置は、車両のフレーム上に設置されるキャビンを防振支持するキャブマウントとして用いられるものである。この防振支持装置は、図１及び図２に示すように、一端にフランジ部１２を有する内側取付部材１と、取付フランジ部２２と第１外側筒状部２３と支持部２４と内側筒状部２５と第２外側筒状部２８とを有し、内側取付部材１の径方向外側に同軸状に配置される外側取付部材２と、内側取付部材１の外側で金属プレート３１及び外側取付部材２により圧縮支持されるように配置され、圧入部３２を有する第１ゴム弾性体３と、内側取付部材１の外側でフランジ部１２及び外側取付部材２により圧縮支持されるように配置され、外側取付部材２に接着されてその内側に位置する中間筒部４１及び小径筒部４２を有する第２ゴム弾性体４とから構成されている。
【００１８】
内側取付部材１は、鉄系金属により筒状に形成されており、円筒状の本体部１１と、本体部１１の一端に溶接接合され、本体部１１の一端より遠心方向に突出するリング状のフランジ部１２とからなる。この内側取付部材１には、取付ボルト５１を挿通するための軸孔１３が軸方向に貫設されている。
【００１９】
外側取付部材２は、それぞれ鉄系金属板をプレス加工することにより形成されて結合された第１部材２１と第２部材２６とからなる。第１部材２１は、外周形状が略菱形に形成され、その中央に内側取付部材１の本体部１１の外径よりも大きい円孔が形成された取付フランジ部２２を有する。この取付フランジ部２２の長手方向の両側には、取付ボルト６１を挿通するための取付孔２２ａ、２２ａが設けられており、この取付孔２２ａ、２２ａの周囲には取付フランジ部２２が厚肉となるように補強リング２２ｂ、２２ｂが固着されている。また、取付フランジ部２２の外周縁部は、内側取付部材１のフランジ部１２側に屈曲されている。
【００２０】
そして、この第１部材２１は、取付フランジ部２２の内周端から軸方向に延びる短い円筒状の第１外側筒状部２３と、第１外側筒状部２３の取付フランジ部２２と反対側の端縁から求心方向に延出するリング状の支持部２４と、支持部２４の内周端から取付フランジ２２から遠ざかるように軸方向に延びる短い円筒状の内側筒状部２５とを有する。内側筒状部２５の内径は、内側取付部材１の本体部１１の外径よりも所定寸法大きくなるように設定されている。
【００２１】
第２部材２６は、支持部２４の裏面（内側筒状部２５側の面）に溶接接合されたリング状の連結部２７と、連結部２７の外周端より取付フランジ部２２から遠ざかるように軸方向に延び、内側筒状部２５と対向配置された円筒状の第２外側筒状部２８とを有する。第２外側筒状部２８は、内側筒状部２５よりも長くなるように形成され、その延出先端部には遠心方向へ屈曲された屈曲部２９が形成されている。
【００２２】
第１ゴム弾性体３は、天然ゴムを主成分とするゴム材料を加硫成形することにより略円筒状に形成されており、その一端面には、その一端面よりも少し大きいリング状の金属プレート３１が加硫接着されている。この第１ゴム弾性体３は、内側取付部材１の本体部１１の外周に圧入により取付けられており、本体部１１の端面に金属プレート３１が当接する状態になっている。この第１ゴム弾性体の金属プレート３１と反対側の端面には、その端面より軸方向外方に突出し、第２外側筒状部２８の内径よりも少し大きい外径を有するリング状の圧入部３２が設けられており、この圧入部３２が外側取付部材２の内側筒状部２５と第２外側筒状部２８との間に圧入されて保持されている。これにより、第１ゴム弾性体３は、金属プレート３１と外側取付部材２とにより軸方向において圧縮支持されるように配置されている。また、第１ゴム弾性体３の外周面には、軸方向におけるばね定数を調整するために環状凹部３３が設けられている。
【００２３】
第２ゴム弾性体４は、天然ゴムを主成分とするゴム材料を加硫成形することにより略円筒状に形成されており、その一端部が外側取付部材２の第１部材２１の内側面に加硫接着されている。即ち、第２ゴム弾性体４の一端部は、他端部よりも小径に形成されており、第１外側筒状部２３及び支持部２４に加硫接着されて第１外側筒状部２３の内側に位置する中間筒部４１と、内側筒状部２５に加硫接着されて内側筒状部２５の内側に位置する小径筒部４２とを有する。
【００２４】
また、第２ゴム弾性体４の略中央部分には、径方向外方に張り出して取付フランジ部２２のフランジ部１２側の表面を覆う張出部４３を有する。この第２ゴム弾性体４の他端部側の外周面には、軸方向におけるばね定数を調整するために環状凹部４４が設けられている。この第２ゴム弾性体４は、内側取付部材１の本体部１１の外周に圧入により取付けられ、内側取付部材１のフランジ部１２と外側取付部材２の第１部材２１とにより軸方向において圧縮支持されるように配置されている。
【００２５】
以上のように構成された本実施形態の防振支持装置は次のようにして作製される。先ず、第１ゴム弾性体３を形成する成形型内に金属プレート３１をインサートしてゴム材料を加硫成形することにより、図３に示すように、金属プレート３１が加硫接着されて一体となった第１ゴム弾性体３を形成する。次に、第２ゴム弾性体４を形成する成形型内に外側取付部材２をインサートしてゴム材料を加硫成形することにより、図４に示すように、外側取付部材２が加硫接着されて一体となった第２ゴム弾性体４を形成する。そして、その第２ゴム弾性体４の内孔に内側取付部材１の本体部１１を圧入して、図５に示すように、第２ゴム弾性体４の端面が内側取付部材１のフランジ部１２に当接する状態に組み付ける。その後、内側取付部材１の本体部１１の先端部を第１ゴム弾性体３の内孔に圧入して、第１ゴム弾性体３の圧入部３２が外側取付部材２の内側筒状部２５と第２外側筒状部２８との間に圧入保持されるとともに、金属プレート３１が本体部１１の端面に当接した状態に組み付ける。これにより、図１及び図２に示すような防振支持装置が完成する。
【００２６】
この防振支持装置は、図１に示すように、例えば車両のボディ５に対して、内側取付部材１の軸孔１３に挿通された取付ボルト５１及びナット５２により内側取付部材１が固定されるとともに、車両の車体フレーム６に対して、外側取付部材２の取付孔２２ａ、２２ａに挿通された取付ボルト６１及びナット６２により外側取付部材２が固定されることによって、その軸方向が上下方向となるようにして取付けられる。このようにして多数の防振支持装置が取付けられることにより、車体フレーム上にボディが防振支持された状態で設置される。
【００２７】
そして、エンジンの作動等に伴って車体フレーム側に振動が発生すると、その振動が第１及び第２ゴム弾性体３、４の弾性変形を介して吸収されることにより、車体フレームからボディへと伝達される振動が効果的に低減される。即ち、ボディに発生するこもり音や不快振動が効果的に低減される。また、車両の走行時等において発生する、車体フレームに対するボディのローリングやピッチング等も第１及び第２ゴム弾性体３、４の弾性変形により効果的に抑制される。
【００２８】
特に、本実施形態の防振支持装置においては、第１ゴム弾性体３が外側取付部材２の内側筒状部２５と第２外側筒状部２８との間に圧入保持された圧入部３２を有することから、第１ゴム弾性体の径方向のばね剛性が高められているとともに、第２ゴム弾性体４が第１外側筒状部２３及び内側筒状部２５の内側に位置する中間筒部４１及び小径筒部４２を有することから、第２ゴム弾性体の径方向のばね剛性が高められている。これにより、第１及び第２ゴム弾性体３、４の軸方向と径方向のばね特性をバランス良く設定することが可能となり、乗り心地の向上を図ることができる。
【００２９】
しかも、第２ゴム弾性体４の中間筒部４１及び小径筒部４２は、外側取付部材２の第１外側筒状部２３、支持部２４及び内側筒状部２５に接着されているため、内側取付部材１と外側取付部材２との間にこじり方向の微振動が入力したときにも、第２ゴム弾性体４と外側取付部材２との間に微少なガタが発生しないので、良好な操縦安定性が確保される。なお、本実施形態の防振支持装置について静ばね特性を調べたところ、図６に示すように、０点付近にガタが発生することのない良好な結果が得られた。
【００３０】
なお、第１ゴム弾性体３は、圧入部３２が外側取付部材２の内側筒状部２５と第２外側筒状部２８との間に圧入保持されていることから、ボディ５が下方に大きく変位した際に、金属プレート３１に加硫接着されている第１ゴム弾性体３は金属プレート３１の動きに追従して下方に変位するため、圧入部３２が外側取付部材２の支持部２４から離れる方向に変位する。しかし、その後、ボディ５が上方に変位する際に、圧入部３２が再び外側取付部材２の内側筒状部２５と第２外側取付部材２８との間で支持部２４に近づく方向に変位して元の状態に戻るため、第１ゴム弾性体３の特性が変化することは少ない。
【００３１】
以上のように、本実施形態の防振支持装置によれば、車両の乗り心地と操縦安定性を向上させ両立させることができる。
【００３２】
また、本実施形態の防振支持装置においては、外側取付部材２の第２外側筒状部２８が、内側筒状部２５の延出先端を越える長さに形成されていることから、第１ゴム弾性体３が第２外側筒状部２８の内側筒状部２５よりも突出した部分と内側取付部材１の本体部１１とによって挟まれる部分を有するため、第１ゴム弾性体３の径方向のばね剛性を更に高めることができる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る防振支持装置の取付け状態（荷重負荷時）を示す軸方向に沿う断面図である。
【図２】本発明の実施形態に係る防振支持装置の平面図である。
【図３】本発明の実施形態に係る第１ゴム弾性体の加硫成形時の状態を示す断面図である。
【図４】本発明の実施形態に係る第２ゴム弾性体の加硫成形時の状態を示す断面図である。
【図５】本発明の実施形態において第２ゴム弾性体と内側取付部材を組み付けた状態を示す断面図である。
【図６】本発明の実施形態に係る防振支持装置の静ばね特性を示すグラフである。
【図７】従来の防振支持装置の軸方向に沿う断面図である。
【図８】従来の防振支持装置の静ばね特性を示すグラフである。
【符号の説明】
１、１０１…内側取付部材２、１０２…外側取付部材
３、１０３…第１ゴム弾性体４、１０４…第２ゴム弾性体
５…ボディ６…車体フレーム１１…本体部
１２、１１２…フランジ部１３…軸孔２１…第１部材
２２…取付フランジ部２２ａ…取付孔２２ｂ…補強リング
２３…第１外側筒状部２４、１２４…支持部
２５…内側筒状部２６…第２部材２７…連結部
２８…第２外側筒状部２９…屈曲部３１…金属プレート
３２…圧入部３３…環状凹部４１…中間筒部
４２…小径筒部４３…張出部４４…環状凹部
５１、６１…取付ボルト５２、６２…ナット[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-vibration support device used as a cab mount, a member mount, a body mount, or the like in a vehicle.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, in a vehicle having a full frame structure, when a body (cabin) is mounted on a vehicle body frame, a vibration isolation support device such as a cab mount has been adopted so that the body is supported with vibration isolation. As shown in FIG. 7, such an anti-vibration support device includes an inner mounting member 101 formed in a cylindrical shape and having flange portions 112, 112 at both ends thereof, and a coaxial outer side of the inner mounting member 101 at a distance. Between the outer mounting member 102 and the inner mounting member 101 and the outer mounting member 102 having a ring-shaped support portion 124 disposed between the two flange portions 112, 112 and opposed to the two flange portions 112, 112. There is known a structure comprising a first rubber elastic body 103 and a second rubber elastic body 104 interposed in the first rubber elastic body (for example, see Patent Document 1). In this anti-vibration support device, the first rubber elastic body 103 is fitted to the outside of the inner member 101, and both ends thereof are fixed to the one flange portion 112 and the support portion 124 so as to be supported in the axial direction by compression. Are located. The second rubber elastic body 104 is fitted to the outside of the inner member 101, one end of the second rubber elastic body 104 is fixed to the other flange portion 112, and the other end is pressed against the support portion 124 of the outer mounting member 102. As a result, they are arranged so as to be compressed and supported in the axial direction.
[0003]
In this anti-vibration support device, the inner mounting member 101 is fixed to one of the vehicle body frame and the body, and the outer mounting member 102 is fixed to one of the other, so that the axial direction is the vertical direction. Used as mounted. By mounting a large number of cab mounts in this manner, the body is mounted on the vehicle body frame in a state where the body is supported by vibration isolation.
[0004]
When vibration is generated on the vehicle body frame side due to operation of the engine or the like, the vibration is absorbed mainly through the elastic deformation of the first and second rubber elastic bodies 103 and 104 in the compression direction. The vibration transmitted from the body to the body is effectively reduced. That is, by appropriately setting the spring characteristics of the first and second rubber elastic bodies 103 and 104 in accordance with the frequency of the vibration to be reduced, the muffled sound and the uncomfortable vibration that the body trembles to become uncomfortable for the occupant. Etc. are effectively reduced. Thereby, the riding comfort of the vehicle is improved. In addition, rolling (rolling) and pitching (rolling in the front-rear direction) of the body with respect to the body frame, which occur during running of the vehicle and the like, are also mainly caused by the elastic deformation of the first and second rubber elastic bodies 103 and 104 in the shear direction. Effectively suppressed. Thereby, good steering stability of the vehicle is ensured. In order to improve the steering stability, the first and second rubber elastic bodies 103 and 104 need to have spring rigidity in the vehicle left-right direction.
[0005]
[Patent Document 1]
JP 2002-235784 A
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional anti-vibration support device, the first and second rubber elastic bodies 103 and 104 are configured to be supported by being compressed in the axial direction (vertical direction). The rigidity in the axial direction increases. For this reason, the first and second rubber elastic bodies 103 and 104 have a structure in which sufficient rigidity in the radial direction (left and right and front and rear directions of the vehicle) cannot be secured. Therefore, in order to be able to satisfactorily suppress rolling and pitching that occur when the vehicle is running, and to ensure good steering stability, the spring characteristics of the first and second rubber elastic bodies 103 and 104 are well-balanced. It becomes difficult to set. Further, since the second rubber elastic body 104 has a structure in which the other end is pressed into contact with the support portion 124 of the outer mounting member 102, the second rubber elastic body 104 is pryed between the inner mounting member 101 and the outer mounting member 102. When a small vibration in the direction is input, minute play is likely to occur between the second rubber elastic body 104 and the outer mounting member 102. That is, in the graph of FIG. 8 showing the static spring characteristics, a play occurs near the zero point, and there is a problem that the steering stability deteriorates.
[0007]
The present invention has been made in view of the above problems, and an object of the present invention is to provide an anti-vibration support device that can improve and improve the riding comfort and steering stability of a vehicle.
[0008]
Means for Solving the Problems, Functions and Effects of the Invention
According to a first aspect of the present invention, there is provided an anti-vibration support device, comprising: an inner mounting member having a cylindrical main body; a flange provided at one end of the main body; A first outer cylindrical portion disposed coaxially at a distance radially outward of the member and a first outer cylindrical portion extending radially inward from an end of the first outer cylindrical portion farther from the flange portion; A ring-shaped support portion disposed to face the flange portion, an inner cylindrical portion extending in a direction away from the flange portion from an inner peripheral end of the support portion, and a direction away from the flange portion from an outer peripheral end of the support portion. An outer mounting member having a second outer cylindrical portion extending therefrom, and a cylindrically formed, press-fitted outer periphery of the main body portion of the inner mounting member, which is disposed at the other end of the inner mounting member. Shaft by the plate and the outer mounting member A first rubber elastic body having a press-fit portion press-fitted and held between the inner tubular portion and the second outer tubular portion of the outer mounting member, the first rubber elastic body being disposed so as to be compression-supported in the And the first outer cylindrical portion is disposed so as to be press-fitted to the outer periphery of the main body portion of the inner mounting member, and to be compressed and supported in the axial direction by the flange portion and the outer mounting member. And a middle cylindrical portion bonded to the support portion and positioned inside the first outer cylindrical portion and a small-diameter cylindrical portion bonded to the inner cylindrical portion and positioned inside the inner cylindrical portion. And a rubber elastic body.
[0009]
In the anti-vibration support device of the present invention, since the first rubber elastic body has the press-fit portion which is press-fitted and held between the inner cylindrical portion and the second outer cylindrical portion of the outer mounting member, the first rubber elastic body is provided. The radial spring stiffness of the body is increased. Further, since the second rubber elastic body has the intermediate cylindrical part located inside the first outer cylindrical part and the small diameter cylindrical part located inside the inner cylindrical part, the second rubber elastic body has a radial direction. Spring rigidity is increased. This makes it possible to set the axial and radial spring characteristics of the first and second rubber elastic bodies in a well-balanced manner, thereby improving ride comfort.
[0010]
Moreover, since the intermediate cylindrical portion and the small-diameter cylindrical portion of the second rubber elastic body are bonded to the first outer cylindrical portion, the support portion, and the inner cylindrical portion of the outer mounting member, the inner mounting member and the outer mounting member are not bonded. Even when a micro-vibration in the twisting direction is inputted between the second rubber elastic body and the outer mounting member, a small play does not occur between the second rubber elastic body and the outer mounting member, so that good steering stability is ensured.
[0011]
Since the first rubber elastic body is press-fitted and held between the inner cylindrical portion of the outer mounting member and the second outer cylindrical portion, the outer mounting member and the plate move away in the axial direction. When a large vibration is input in the direction, when the first rubber elastic body is displaced following the movement of the plate, the press-fit portion is displaced away from the support portion of the outer mounting member. However, after that, when the outer mounting member and the plate are displaced in the approaching direction (rebound direction), the press-fit portion again approaches the supporting portion between the inner cylindrical portion of the outer mounting member and the second outer mounting member. And the characteristics of the first rubber elastic body are rarely changed.
[0012]
Therefore, according to the anti-vibration support device of the present invention, it is possible to improve the riding comfort and the steering stability of the vehicle and achieve both.
[0013]
According to a second aspect of the present invention, there is provided an anti-vibration support device, wherein the second outer cylindrical portion according to the first aspect of the present invention is formed to have a length exceeding an extension end of the inner cylindrical portion. Is adopted.
[0014]
According to this means, the first rubber elastic body has a portion protruding from the inner cylindrical portion of the second outer cylindrical portion and a portion sandwiched by the inner mounting member. The spring rigidity in the radial direction of the body can be further increased.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a cross-sectional view along the axial direction showing an attached state (when a load is applied) of the anti-vibration support device according to the present embodiment, and FIG. 2 is a plan view of the anti-vibration support device.
[0017]
The anti-vibration support device according to the present embodiment is used as a cab mount that supports an anti-vibration cabin installed on a vehicle frame. As shown in FIGS. 1 and 2, the anti-vibration support device includes an inner mounting member 1 having a flange portion 12 at one end, an mounting flange portion 22, a first outer cylindrical portion 23, a support portion 24, and an inner cylindrical shape. An outer mounting member 2 which has a portion 25 and a second outer cylindrical portion 28 and is coaxially arranged radially outside of the inner mounting member 1; a metal plate 31 and an outer mounting member outside the inner mounting member 1; 2, a first rubber elastic body 3 having a press-fit portion 32 and a press-fit portion 32. The first rubber elastic body 3 is arranged to be compressed and supported by the flange portion 12 and the outer mounting member 2 outside the inner mounting member 1, and A second rubber elastic body 4 having an intermediate cylindrical portion 41 and a small-diameter cylindrical portion 42 which are adhered to the mounting member 2 and located inside the mounting member 2.
[0018]
The inner mounting member 1 is formed in a cylindrical shape from an iron-based metal, and is welded to one end of the main body 11 with a cylindrical main body 11. And a flange portion 12. A shaft hole 13 through which the mounting bolt 51 is inserted is formed in the inner mounting member 1 in the axial direction.
[0019]
The outer mounting member 2 includes a first member 21 and a second member 26 that are formed by pressing an iron-based metal plate and that are connected to each other. The first member 21 has a mounting flange portion 22 having an outer peripheral shape formed substantially in a rhombus shape and having a circular hole formed at the center thereof having a larger hole than the outer diameter of the main body portion 11 of the inner mounting member 1. Mounting holes 22a, 22a for inserting mounting bolts 61 are provided on both sides in the longitudinal direction of the mounting flange portion 22, and the mounting flange portion 22 is thick around the mounting holes 22a, 22a. The reinforcing rings 22b, 22b are fixed so as to be as shown in FIG. The outer peripheral edge of the mounting flange 22 is bent toward the flange 12 of the inner mounting member 1.
[0020]
The first member 21 has a short cylindrical first outer cylindrical portion 23 extending in the axial direction from the inner peripheral end of the mounting flange portion 22, and a side of the first outer cylindrical portion 23 opposite to the mounting flange portion 22. A ring-shaped support portion 24 extending in the centripetal direction from the edge of the support portion 24, and a short cylindrical inner cylindrical portion 25 extending in the axial direction away from the mounting flange 22 from the inner peripheral end of the support portion 24. The inner diameter of the inner cylindrical portion 25 is set to be larger by a predetermined dimension than the outer diameter of the main body 11 of the inner mounting member 1.
[0021]
The second member 26 has a ring-shaped connecting portion 27 welded to the back surface (the surface on the side of the inner cylindrical portion 25) of the support portion 24, and a shaft that is farther from the mounting flange portion 22 than the outer peripheral end of the connecting portion 27. And a second outer cylindrical portion 28 having a cylindrical shape and facing the inner cylindrical portion 25. The second outer cylindrical portion 28 is formed so as to be longer than the inner cylindrical portion 25, and a bent portion 29 bent in the centrifugal direction is formed at the extension end portion.
[0022]
The first rubber elastic body 3 is formed in a substantially cylindrical shape by vulcanizing and molding a rubber material containing natural rubber as a main component, and has a ring-shaped metal slightly larger than the one end surface on one end surface thereof. The plate 31 is vulcanized and bonded. The first rubber elastic body 3 is mounted on the outer periphery of the main body 11 of the inner mounting member 1 by press-fitting, and the metal plate 31 is in contact with the end surface of the main body 11. A ring-shaped press-fit portion, which protrudes axially outward from the end surface of the first rubber elastic body opposite to the metal plate 31 and has an outer diameter slightly larger than the inner diameter of the second outer cylindrical portion 28. The press-fit portion 32 is press-fitted and held between the inner tubular portion 25 and the second outer tubular portion 28 of the outer mounting member 2. Thereby, the first rubber elastic body 3 is arranged so as to be compressed and supported in the axial direction by the metal plate 31 and the outer mounting member 2. Further, an annular concave portion 33 is provided on the outer peripheral surface of the first rubber elastic body 3 to adjust a spring constant in the axial direction.
[0023]
The second rubber elastic body 4 is formed in a substantially cylindrical shape by vulcanizing and molding a rubber material containing natural rubber as a main component, and one end thereof is provided on the inner surface of the first member 21 of the outer mounting member 2. Vulcanized adhesive. That is, one end of the second rubber elastic body 4 is formed to have a smaller diameter than the other end, and is vulcanized and bonded to the first outer cylindrical portion 23 and the support portion 24 to form the first outer cylindrical portion 23. It has an intermediate tubular portion 41 located inside and a small-diameter tubular portion 42 vulcanized and bonded to the inside tubular portion 25 and located inside the inside tubular portion 25.
[0024]
A substantially central portion of the second rubber elastic body 4 has a projecting portion 43 projecting radially outward to cover the surface of the mounting flange portion 22 on the flange portion 12 side. On the outer peripheral surface on the other end side of the second rubber elastic body 4, an annular concave portion 44 is provided for adjusting a spring constant in the axial direction. The second rubber elastic body 4 is attached to the outer periphery of the main body 11 of the inner mounting member 1 by press-fitting, and is compressed and supported in the axial direction by the flange 12 of the inner mounting member 1 and the first member 21 of the outer mounting member 2. It is arranged to be.
[0025]
The anti-vibration support device of the present embodiment configured as described above is manufactured as follows. First, the metal plate 31 is inserted into a mold for forming the first rubber elastic body 3 to vulcanize and mold the rubber material. As shown in FIG. The resulting first rubber elastic body 3 is formed. Next, the outer mounting member 2 is vulcanized and molded by vulcanizing the rubber material by inserting the outer mounting member 2 into a mold for forming the second rubber elastic body 4, as shown in FIG. The second rubber elastic body 4 is formed as a single unit. Then, the main body 11 of the inner mounting member 1 is press-fitted into the inner hole of the second rubber elastic body 4 so that the end face of the second rubber elastic body 4 is connected to the flange 12 of the inner mounting member 1 as shown in FIG. Assemble in a state of contact with. Thereafter, the distal end of the main body 11 of the inner mounting member 1 is press-fitted into the inner hole of the first rubber elastic body 3 so that the press-fitting portion 32 of the first rubber elastic body 3 and the inner cylindrical portion 25 of the outer mounting member 2 are pressed. It is press-fitted and held between the second outer cylindrical portion 28 and the metal plate 31 is assembled in a state of being in contact with the end surface of the main body 11. This completes the anti-vibration support device as shown in FIGS.
[0026]
In this anti-vibration support device, as shown in FIG. 1, the inner mounting member 1 is fixed to the body 5 of the vehicle, for example, by mounting bolts 51 and nuts 52 inserted into the shaft holes 13 of the inner mounting member 1. At the same time, the outer mounting member 2 is fixed to the vehicle body frame 6 by the mounting bolts 61 and the nuts 62 inserted into the mounting holes 22a, 22a of the outer mounting member 2, so that the axial direction is the vertical direction. It is attached as if it were. By mounting a large number of anti-vibration devices in this manner, the body is installed on the vehicle body frame in a state where the vibration is supported.
[0027]
When vibration occurs on the vehicle body frame side due to the operation of the engine or the like, the vibration is absorbed through the elastic deformation of the first and second rubber elastic bodies 3 and 4, so that the vibration is transmitted from the vehicle body frame to the body. The transmitted vibration is effectively reduced. That is, muffled sound and unpleasant vibration generated in the body are effectively reduced. In addition, rolling and pitching of the body with respect to the body frame, which occur when the vehicle is running, are effectively suppressed by the elastic deformation of the first and second rubber elastic bodies 3 and 4.
[0028]
In particular, in the anti-vibration support device of the present embodiment, the first rubber elastic body 3 is press-fitted and held between the inner cylindrical portion 25 and the second outer cylindrical portion 28 of the outer mounting member 2. As a result, the radial elasticity of the first rubber elastic body is increased, and the second rubber elastic body 4 is located inside the first outer cylindrical part 23 and the inner cylindrical part 25. Due to the provision of the small-diameter cylindrical portion 41 and the small-diameter cylindrical portion 42, the radial elasticity of the second rubber elastic body is increased. This makes it possible to set the axial and radial spring characteristics of the first and second rubber elastic bodies 3 and 4 in a well-balanced manner, thereby improving ride comfort.
[0029]
Moreover, since the intermediate tubular portion 41 and the small-diameter tubular portion 42 of the second rubber elastic body 4 are bonded to the first outer tubular portion 23, the support portion 24, and the inner tubular portion 25 of the outer mounting member 2, Even when micro-vibration in the twisting direction is input between the mounting member 1 and the outer mounting member 2, fine play is not generated between the second rubber elastic body 4 and the outer mounting member 2, so that good steering is achieved. Stability is ensured. In addition, when the static spring characteristics of the anti-vibration support device of the present embodiment were examined, as shown in FIG. 6, a good result without rattling near the zero point was obtained.
[0030]
Since the press-fit portion 32 of the first rubber elastic body 3 is press-fitted and held between the inner cylindrical portion 25 and the second outer cylindrical portion 28 of the outer mounting member 2, the body 5 is largely lowered. When displaced, the first rubber elastic body 3 vulcanized and bonded to the metal plate 31 is displaced downward following the movement of the metal plate 31, so that the press-fit portion 32 is displaced from the support portion 24 of the outer mounting member 2. Displaced away. However, after that, when the body 5 is displaced upward, the press-fit portion 32 is displaced again in the direction approaching the support portion 24 between the inner cylindrical portion 25 of the outer mounting member 2 and the second outer mounting member 28. Since the state returns to the original state, the characteristics of the first rubber elastic body 3 hardly change.
[0031]
As described above, according to the anti-vibration support device of the present embodiment, it is possible to improve the ride comfort and the steering stability of the vehicle and achieve both.
[0032]
Further, in the anti-vibration support device of the present embodiment, since the second outer cylindrical portion 28 of the outer mounting member 2 is formed to have a length exceeding the extending end of the inner cylindrical portion 25, Since the rubber elastic body 3 has a portion protruding from the inner cylindrical portion 25 of the second outer cylindrical portion 28 and a portion sandwiched by the main body 11 of the inner mounting member 1, the radial direction of the first rubber elastic body 3 Can further increase the spring stiffness.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view along an axial direction showing a mounting state (when a load is applied) of an anti-vibration support device according to an embodiment of the present invention.
FIG. 2 is a plan view of an anti-vibration support device according to the embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a state at the time of vulcanization molding of the first rubber elastic body according to the embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a state at the time of vulcanization molding of a second rubber elastic body according to the embodiment of the present invention.
FIG. 5 is a cross-sectional view showing a state where a second rubber elastic body and an inner mounting member are assembled in the embodiment of the present invention.
FIG. 6 is a graph showing static spring characteristics of the vibration isolating support device according to the embodiment of the present invention.
FIG. 7 is a cross-sectional view along the axial direction of a conventional anti-vibration support device.
FIG. 8 is a graph showing static spring characteristics of a conventional anti-vibration support device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1, 101 ... inner mounting member 2, 102 ... outer mounting member 3, 103 ... 1st rubber elastic body 4, 104 ... 2nd rubber elastic body 5 ... body 6 ... body frame 11 ... main body part 12, 112 ... flange part 13 ... Shaft hole 21 ... First member 22 ... Mounting flange portion 22a ... Mounting hole 22b ... Reinforcement ring 23 ... First outer tubular portion 24,124 ... Support portion 25 ... Inner tubular portion 26 ... Second member 27 ... Connecting portion 28 second outer cylindrical portion 29 bent portion 31 metal plate 32 press-fit portion 33 annular concave portion 41 intermediate cylindrical portion 42 small-diameter cylindrical portion 43 projecting portion 44 annular concave portions 51 and 61 mounting bolt 52 , 62 ... nut

Claims

An inner attachment member having a cylindrical main body and a flange provided at one end of the main body,
A first outer cylindrical portion disposed coaxially at a distance outside the inner mounting member at a distance and extending radially inward from an end of the first outer cylindrical portion farther from the flange portion; A ring-shaped support portion which is disposed to face the flange portion, an inner cylindrical portion extending from the inner peripheral end of the support portion in a direction away from the flange portion, and an outer peripheral end of the support portion from the flange portion. An outer mounting member having a second outer cylindrical portion extending in a direction away from the outer mounting member;
The inner mounting member is formed in a cylindrical shape, and is mounted on the outer periphery of the main body portion of the inner mounting member by press-fitting, and is compressed and supported in the axial direction by the plate disposed at the other end of the inner mounting member and the outer mounting member. A first rubber elastic body having a press-fit portion that is press-fitted and held between the inner tubular portion and the second outer tubular portion of the outer mounting member;
The first outer cylinder is formed in a cylindrical shape, is mounted on the outer periphery of the main body of the inner mounting member by press-fitting, and is compressed and supported in the axial direction by the flange portion and the outer mounting member. An intermediate tubular portion that is adhered to the first tubular portion and that is attached to the support portion and a small-diameter tubular portion that is attached to the inside tubular portion and located inside the inside tubular portion. A second rubber elastic body having
An anti-vibration support device comprising:

The anti-vibration support device according to claim 1, wherein the second outer cylindrical portion is formed to have a length exceeding an extension end of the inner cylindrical portion.