JP3723633B2

JP3723633B2 - Vibration isolator

Info

Publication number: JP3723633B2
Application number: JP13954796A
Authority: JP
Inventors: 功戸川; 康弘鈴木; 浩二安斎
Original assignee: Bridgestone Corp; Nissan Motor Co Ltd
Current assignee: Bridgestone Corp; Nissan Motor Co Ltd
Priority date: 1996-05-08
Filing date: 1996-05-08
Publication date: 2005-12-07
Anticipated expiration: 2016-05-08
Also published as: JPH09303459A

Description

【０００１】
【発明の属する技術分野】
この発明は、振動発生部及び振動受部の一方へ連結される内側取付部材と、この内側取付部材を取り囲むように配設されかつ振動発生部及び振動受部の他方へ連結される外側取付部材と、内側取付部材と外側取付部材との間に連結された弾性体とを有するエンジンマウント等に使用される防振装置に関する。
【０００２】
【従来の技術】
従来のこの種の防振装置としては、図７及び図８に示すエンジンマウントが知られている。これは車体側に連結される筒状の内側取付部材１００と、この内側取付部材１００を取り囲むように配設されかつエンジン側へ連結される筒状の外側取付部材１０１と、内側取付部材１００と外側取付部材１０１との間に連結された弾性体１０２とを有し、外側取付部材１０１はエンジンに取り付くブラケット１０３に圧入されている。弾性体１０２にはすぐり部１０４が形成されるとともに、ストッパ部１０５が形成されている。
【０００３】
【発明が解決しようとする課題】
従来の防振装置では、Ｙ方向に比べＺ方向が弾性体の剪断バネとなるため、Ｚ方向のバネ定数が小さくなってしまう。そのため、防振装置の取付方向に応じてＹ方向を車両の前後方向に用いると、Ｚ方向（車両の左右方向）が柔らかくなり、逆にＹ方向を車両の左右方向に用いると、Ｚ方向（車両の前後方向）が柔らかくなってしまう。その結果Ｚ軸方向においてはエンジンの動きが大きくなり、操縦安定性が悪くなるという不都合があった。
【０００４】
そこで、この発明は、内側取付部材の軸方向のバネ定数を大きくし、この方向の振動発生部の動きを抑制し、車両用の場合には操縦安定性を良好にすることのできる防振装置を提供することを目的とする。
【０００５】
【課題を解決するための手段】
上述の目的を達成するため、この発明は、振動発生部及び振動受部の一方へ連結される内側取付部材と、この内側取付部材を取り囲むように配設されかつ振動発生部及び振動受部の他方へ連結される外側取付部材と、内側取付部材と外側取付部材との間に連結された弾性体とを有する防振装置において、外側取付部材における軸方向の両端から内側取付部材に向けて斜め上方に立ち上がり、内側取付部材の中央部分に合流して連結され全体として軸方向に延設された第２弾性体を備え、前記外側取付部材から立ち上がる第２弾性体と外側取付部材の軸方向の両端間との間に空間が形成され、前記外側取付部材の軸方向両端部から内側取付部材に向かって立ち上がった一対の立上部を形成し、これら一対の立上部に前記第２弾性体を連結したものである。
【０００６】
【発明の実施の形態】
以下に、この発明の好適な実施例を図面を参照にして説明する。
【０００７】
図１に示す実施例では、振動発生部及び振動受部の一方へ連結される筒状の内側取付部材１と、この内側取付部材１を取り囲むように配設されかつ振動発生部及び振動受部の他方へ連結される外側取付部材２と、内側取付部材１と外側取付部材２との間に連結された弾性体３とを有し、外側取付部材２はコ字状部２Ａと、このコ字状部２Ａの両端から延びるフランジ部２Ｂと、これらフランジ部２Ｂに取付く底板部２Ｃとから構成してある。内側取付部材１にその径方向外側に延びて突起部４が設けてある。この突起部４は図２に示す。また、この突起部４の内側取付部材１の軸方向両端側と同一方向の両側面に向き合うように外側取付部材２を構成する底板部２Ｃから立ち上がった一対の立上部５を底板部２Ｃに形成してある。突起部４は内側取付部材１に対し溶接等の手段により固着してあり、図面上は内側取付部材１から下方に延出されている。この突起部４と立上部５との間に第２弾性体６が連結される。この第２弾性体６は弾性体３をゴム材料で加硫成形するときに一緒に成形される。突起部４はストッパを兼ねている。コ字状部２Ａと弾性体３の頂部すなわちストッパダム部３Ａとは接着されてはおらず、接触しているだけである。このストッパダム部３Ａが内側取付部材１の図面上上方への移動を規制している。そして、図面上下方への移動を規制するのは突起部４である。このような防振装置の製造は、加硫成形金型内に内側取付部材１をセットし、弾性体３、第２弾性体６を加硫成形して内側取付部材１と接着一体化したものに、外側取付部材２及び立上部５を嵌合させ、フランジ部２Ｂと底板部２Ｃとをスポット溶接等により固定することにより行なわれる。
【０００８】
図３及び図４に示す実施例は、底板部２Ｃから爪部２Ｄを切り起こし、この爪部２Ｄをフランジ部２Ｂに開けた孔に嵌め込み、その後かしめ加工してフランジ部２Ｂと底板部２Ｃとを固着し、コ字状部２Ａは強度向上のために両側にリブ２Ｅを形成したものである。その他の構成は先の実施例と同様であるため説明を省略する。なお、この実施例の防振装置の製造も、加硫成形金型内に内側取付部材１と外側取付部材２とをセットし、弾性体３、第２弾性体６を加硫成形したものに、底板部２Ｃを嵌合させ、爪部２Ｄをかしめて行なわれる。
【０００９】
図５及び図６に示す他の実施例では、外側取付部材２を樹脂材料で成形したものを示し、この外側取付部材２は樹脂材料で一体成形されている。外側取付部材２を樹脂材料で一体成形したものと金属製の筒状内側取付部材１とを図示しない加硫成形金型にセットし、この金型内にゴム材料を射出成形することにより図６に示すように弾性体３及び第２弾性体６が加硫成形され、内側取付部材１と外側取付部材２に加硫接着される。外側取付部材２を樹脂材料で一体成形しておけば、成形も容易であり、軽量化を図ることができる。この実施例の防振装置は、内側取付部材１と弾性体３及び第２弾性体６を加硫接着したものを射出成形金型内にセットし、樹脂材料を弾性体３及び第２弾性体６の周囲に射出して外側取付部材２等を成形するものである。
【００１０】
【発明の効果】
以上説明したように、この発明によれば、振動発生部及び振動受部の一方へ連結される内側取付部材と、この内側取付部材を取り囲むように配設されかつ振動発生部及び振動受部の他方へ連結される外側取付部材と、内側取付部材と外側取付部材との間に連結された弾性体とを有する防振装置において、外側取付部材における軸方向の両端から内側取付部材に向けて斜め上方に立ち上がり、内側取付部材の中央部分に合流して連結され全体として軸方向に延設された第２弾性体を備え、前記外側取付部材から立ち上がる第２弾性体と外側取付部材の軸方向の両端間との間に空間が形成され、前記外側取付部材の軸方向両端部から内側取付部材に向かって立ち上がった一対の立上部を形成し、これら一対の立上部に前記第２弾性体を連結したので、内側取付部材の軸方向のバネ定数を所定の大きさにすることができ、例えばエンジンマウントとして使用する場合には、エンジンの内側取付部材の軸線方向への揺れが大きくなって車両の操縦安定性を損うこともなくなる。
【図面の簡単な説明】
【図１】この発明の好適な実施例を示す正面図。
【図２】図１の中央縦断面図。
【図３】別の実施例を示す正面図。
【図４】図３の中央縦断面図。
【図５】さらに別の実施例を示す正面図。
【図６】図５の中央縦断面図。
【図７】従来例の正面図。
【図８】従来例の中央縦断面図。
【符号の説明】
１内側取付部材
２外側取付部材
３弾性体
４突起部
５立上部
６第２弾性体[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, and an outer mounting member disposed so as to surround the inner mounting member and connected to the other of the vibration generating portion and the vibration receiving portion. And an anti-vibration device used for an engine mount or the like having an elastic body coupled between an inner mounting member and an outer mounting member.
[0002]
[Prior art]
As this type of conventional vibration isolator, an engine mount shown in FIGS. 7 and 8 is known. This includes a cylindrical inner mounting member 100 connected to the vehicle body side, a cylindrical outer mounting member 101 disposed so as to surround the inner mounting member 100 and connected to the engine side, and an inner mounting member 100. The outer attachment member 101 is press-fitted into a bracket 103 that is attached to the engine. The elastic body 102 is formed with a straight portion 104 and a stopper portion 105.
[0003]
[Problems to be solved by the invention]
In the conventional vibration isolator, the spring constant in the Z direction becomes smaller because the Z direction becomes a shear spring of the elastic body compared to the Y direction. Therefore, if the Y direction is used in the front-rear direction of the vehicle according to the mounting direction of the vibration isolator, the Z direction (the left-right direction of the vehicle) is softened. Conversely, if the Y direction is used in the left-right direction of the vehicle, the Z direction ( The longitudinal direction of the vehicle becomes soft. As a result, in the Z-axis direction, the movement of the engine becomes large, and there is a disadvantage that steering stability is deteriorated.
[0004]
Therefore, the present invention increases the axial spring constant of the inner mounting member, suppresses the movement of the vibration generating portion in this direction, and can improve steering stability in the case of a vehicle. The purpose is to provide.
[0005]
[Means for Solving the Problems]
In order to achieve the above-described object, the present invention includes an inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, and the inner mounting member disposed so as to surround the inner mounting member and the vibration generating portion and the vibration receiving portion. In an anti-vibration device having an outer mounting member connected to the other and an elastic body connected between the inner mounting member and the outer mounting member, the outer mounting member is slanted from both axial ends of the outer mounting member toward the inner mounting member. A second elastic body that rises upward, joins and is connected to the central portion of the inner mounting member, and extends in the axial direction as a whole ; and the second elastic body rising from the outer mounting member and the axial direction of the outer mounting member A space is formed between both ends, and a pair of raised portions rising from both axial ends of the outer mounting member toward the inner mounting member is formed, and the second elastic body is connected to the pair of rising portions. also it was It is.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of the present invention will be described below with reference to the drawings.
[0007]
In the embodiment shown in FIG. 1, a cylindrical inner mounting member 1 connected to one of the vibration generating portion and the vibration receiving portion, and the vibration generating portion and the vibration receiving portion disposed so as to surround the inner mounting member 1. The outer mounting member 2 is connected to the other of the two, and the elastic member 3 is connected between the inner mounting member 1 and the outer mounting member 2, and the outer mounting member 2 includes a U-shaped portion 2A and The flange portion 2B extends from both ends of the character-shaped portion 2A, and a bottom plate portion 2C attached to the flange portion 2B. The inner mounting member 1 is provided with a protrusion 4 extending radially outward. This protrusion 4 is shown in FIG. Further, a pair of raised portions 5 rising from the bottom plate portion 2C constituting the outer mounting member 2 are formed on the bottom plate portion 2C so as to face both side surfaces in the same direction as both axial ends of the inner mounting member 1 of the protruding portion 4. It is. The protrusion 4 is fixed to the inner mounting member 1 by means such as welding, and extends downward from the inner mounting member 1 in the drawing. A second elastic body 6 is connected between the protrusion 4 and the upright portion 5. The second elastic body 6 is molded together when the elastic body 3 is vulcanized with a rubber material. The protrusion 4 also serves as a stopper. The U-shaped portion 2A and the top portion of the elastic body 3, that is, the stopper dam portion 3A are not bonded but only contacted. The stopper dam portion 3A regulates the upward movement of the inner mounting member 1 in the drawing. And it is the projection part 4 which controls the downward movement on drawing. Such a vibration isolator is manufactured by setting the inner mounting member 1 in a vulcanization molding die, vulcanizing and molding the elastic body 3 and the second elastic body 6 and integrating them with the inner mounting member 1. The outer mounting member 2 and the upright portion 5 are fitted together, and the flange portion 2B and the bottom plate portion 2C are fixed by spot welding or the like.
[0008]
In the embodiment shown in FIGS. 3 and 4, the claw portion 2D is cut and raised from the bottom plate portion 2C, and the claw portion 2D is fitted into a hole formed in the flange portion 2B. The U-shaped portion 2A is formed by forming ribs 2E on both sides in order to improve the strength. Since other configurations are the same as those of the previous embodiment, the description thereof is omitted. In addition, in the manufacture of the vibration isolator of this embodiment, the inner mounting member 1 and the outer mounting member 2 are set in the vulcanization mold, and the elastic body 3 and the second elastic body 6 are vulcanized and molded. The bottom plate portion 2C is fitted and the claw portion 2D is caulked.
[0009]
In other embodiments shown in FIGS. 5 and 6, the outer mounting member 2 is formed of a resin material, and the outer mounting member 2 is integrally formed of a resin material. The outer mounting member 2 integrally molded with a resin material and the metallic cylindrical inner mounting member 1 are set in a vulcanization molding die (not shown), and a rubber material is injection-molded in the molding die, as shown in FIG. As shown in FIG. 2, the elastic body 3 and the second elastic body 6 are vulcanized and formed and vulcanized and bonded to the inner mounting member 1 and the outer mounting member 2. If the outer mounting member 2 is integrally formed of a resin material, the molding is easy and the weight can be reduced. In the vibration isolator of this embodiment, the inner mounting member 1, the elastic body 3 and the second elastic body 6 which are vulcanized and bonded are set in an injection mold, and the resin material is used as the elastic body 3 and the second elastic body. 6 is molded around the outer mounting member 2 and the like.
[0010]
【The invention's effect】
As described above, according to the present invention, the inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, the inner mounting member disposed so as to surround the inner mounting member, and the vibration generating portion and the vibration receiving portion. In an anti-vibration device having an outer mounting member connected to the other and an elastic body connected between the inner mounting member and the outer mounting member, the outer mounting member is slanted from both axial ends of the outer mounting member toward the inner mounting member. A second elastic body that rises upward, joins and is connected to the central portion of the inner mounting member, and extends in the axial direction as a whole ; and the second elastic body rising from the outer mounting member and the axial direction of the outer mounting member A space is formed between both ends, and a pair of raised portions rising from both axial ends of the outer mounting member toward the inner mounting member is formed, and the second elastic body is connected to the pair of rising portions. was the The axial spring constant of the inner mounting member can be set to a predetermined size. For example, when used as an engine mount, the inner mounting member of the engine is greatly shaken in the axial direction, thereby stabilizing the steering of the vehicle. There is no loss of sex.
[Brief description of the drawings]
FIG. 1 is a front view showing a preferred embodiment of the present invention.
2 is a central longitudinal sectional view of FIG. 1. FIG.
FIG. 3 is a front view showing another embodiment.
4 is a central longitudinal sectional view of FIG. 3;
FIG. 5 is a front view showing still another embodiment.
6 is a central longitudinal sectional view of FIG.
FIG. 7 is a front view of a conventional example.
FIG. 8 is a central longitudinal sectional view of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inner attachment member 2 Outer attachment member 3 Elastic body 4 Protrusion part 5 Upright part 6 2nd elastic body

Claims

An inner mounting member connected to one of the vibration generating portion and the vibration receiving portion; an outer mounting member disposed so as to surround the inner mounting member and connected to the other of the vibration generating portion and the vibration receiving portion; In the vibration isolator having an elastic body connected between the member and the outer mounting member,
A second elastic body that rises obliquely upward from both axial ends of the outer mounting member toward the inner mounting member, joins and is connected to the central portion of the inner mounting member, and extends in the axial direction as a whole ,
A space is formed between the second elastic body rising from the outer mounting member and both ends in the axial direction of the outer mounting member,
A vibration isolator comprising a pair of raised portions rising from both axial ends of the outer mounting member toward the inner mounting member, and the second elastic body being connected to the pair of raised portions .

An inner mounting member connected to one of the vibration generating portion and the vibration receiving portion; an outer mounting member disposed so as to surround the inner mounting member and connected to the other of the vibration generating portion and the vibration receiving portion; In the vibration isolator having an elastic body connected between the member and the outer mounting member,
The second elastic bodies are respectively connected so as to extend in the axial direction between a pair of raised portions rising from both axial ends of the outer mounting member and the inner mounting member,
Providing the inner mounting member with a protrusion provided to extend outward in the radial direction,
A vibration isolator comprising a second elastic body connected to the protrusion.

The vibration isolator according to claim 2 , wherein the protrusion is embedded in the second elastic body.