JPH05164166A - Exhaust mount rubber - Google Patents
Exhaust mount rubberInfo
- Publication number
- JPH05164166A JPH05164166A JP3332390A JP33239091A JPH05164166A JP H05164166 A JPH05164166 A JP H05164166A JP 3332390 A JP3332390 A JP 3332390A JP 33239091 A JP33239091 A JP 33239091A JP H05164166 A JPH05164166 A JP H05164166A
- Authority
- JP
- Japan
- Prior art keywords
- mount rubber
- bridge
- exhaust tube
- bracket
- portions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Supports For Pipes And Cables (AREA)
- Vibration Prevention Devices (AREA)
- Springs (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車等の車両のエキゾ
ーストチューブを車体フロア下側に弾性支持するエキゾ
ーストマウントラバーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust mount rubber for elastically supporting an exhaust tube of a vehicle such as an automobile under a vehicle body floor.
【０００２】[0002]
【従来の技術】自動車等の車両にあっては、エキゾース
トチューブを車体フロアの下側に配管するため、このエ
キゾーストチューブの振動が車体フロアに伝わらないよ
うに、該エキゾーストチューブを車体フロアの下面にマ
ウントラバーを介して吊持し、該マウントラバーによっ
てエキゾーストチューブの振動を減衰するようにしてい
る。これを図５，６によって具体的に説明すると、１は
エキゾーストチューブ、２はエキゾーストチューブ１に
固設したブラケット、３は車体フロア、４は車体フロア
３の下面に固設したブラケットで、これらブラケット
２，４に亙ってマウントラバー５を係着して、該マウン
トラバー５によってエキゾーストチューブ１を車体フロ
ア３の下面に弾性的に吊持してある。2. Description of the Related Art In a vehicle such as an automobile, the exhaust tube is installed under the vehicle body floor. Therefore, the exhaust tube is attached to the lower surface of the vehicle body floor so that the vibration of the exhaust tube is not transmitted to the vehicle body floor. It is suspended via a mount rubber, and the mount rubber damps the vibration of the exhaust tube. This will be described in detail with reference to FIGS. 5 and 6. Reference numeral 1 is an exhaust tube, 2 is a bracket fixed to the exhaust tube 1, 3 is a vehicle body floor, and 4 is a bracket fixed to the lower surface of the vehicle body floor 3. A mount rubber 5 is engaged over the areas 2 and 4, and the exhaust tube 1 is elastically suspended on the lower surface of the vehicle body floor 3 by the mount rubber 5.
【０００３】マウントラバー５は耐熱性のゴム材をもっ
て略長円形に形成してあり、上，下端部の挿通孔６ａを
有するブラケット取付部６，６と、これらブラケット取
付部６，６を連結する一対のブリッジ部７，７とからな
り、かつ、ブラケット取付部６，６の内周側には突部
８，８を対向的に突設してあって、リバウンド時にこれ
ら突部８，８が弾接することによって制振効果が得られ
るようにしてある。この類似構造は、例えば特開昭６２
ー２６１２２号公報に示されている。The mount rubber 5 is formed of a heat-resistant rubber material into a substantially oval shape, and connects the bracket mounting portions 6 and 6 having through holes 6a at the upper and lower ends to the bracket mounting portions 6 and 6. It is composed of a pair of bridge portions 7, 7, and the protrusions 8, 8 are provided so as to face each other on the inner peripheral side of the bracket mounting portions 6, 6, and these protrusions 8, 8 are provided at the time of rebound. The vibration damping effect is obtained by elastic contact. This similar structure is disclosed, for example, in Japanese Patent Laid-Open No. Sho 62-62.
No. 26122.
【０００４】[0004]
【発明が解決しようとする課題】マウントラバー５によ
る防振効果は、該マウントラバー５の上，下端部のブラ
ケット取付部６，６を結ぶ一対の対称的なブリッジ部
７，７のばね定数に依存され、これらブリッジ部７，７
のばね定数はエキゾーストチューブ１を吊持した際に、
該エキゾーストチューブ１が過大に遊動することのない
ように後述する振動伝達率との兼合いで適宜に設定され
る。The anti-vibration effect of the mount rubber 5 depends on the spring constant of the pair of symmetrical bridge portions 7, 7 connecting the bracket mounting portions 6, 6 at the upper and lower ends of the mount rubber 5. Depends on these bridge parts 7,7
The spring constant of is, when the exhaust tube 1 is suspended,
The exhaust tube 1 is appropriately set in consideration of the vibration transmissibility to be described later so as not to excessively move.
【０００５】このマウントラバー５は、図４のａ線で示
すように振動伝達率のピーク点ａ1が、同図のｂ線で示
すブラケット４の振動伝達率のピーク点ｂ1と重ならな
いようにその固有値が任意に設定される。In this mount rubber 5, the peak point a 1 of the vibration transmissibility shown by the line a in FIG. 4 does not overlap with the peak point b 1 of the vibration transmissibility of the bracket 4 shown by the line b in the figure. The eigenvalue is arbitrarily set in.
【０００６】ところが、このようにブラケット４の振動
伝達率のピーク点ｂ1に対して、マウントラバー５の振
動伝達率のピーク点ａ1がずれるようにその固有値を設
定したとしても、実際にはエキゾーストチューブ１が発
熱することによってマウントラバーのバネ定数が低下し
マウントラバー５の振動伝達率のピーク点ａ1が矢印で
示すようにずれ動いて、ブラケット４の振動伝達率のピ
ーク点ｂ1と重なり合ってしまい、エキゾーストチュー
ブ支持系の振動伝達率が大きくなって防振効果が損なわ
れてしまう。However, even if the eigenvalue is set so that the peak point a 1 of the vibration transmissibility of the mount rubber 5 deviates from the peak point b 1 of the vibration transmissibility of the bracket 4 as described above, in practice. The heat constant of the exhaust tube 1 reduces the spring constant of the mount rubber, and the peak point a 1 of the vibration transmissibility of the mount rubber 5 shifts as shown by the arrow, resulting in a peak point b 1 of the vibration transmissibility of the bracket 4. Since they are overlapped with each other, the vibration transmissibility of the exhaust tube support system is increased and the vibration damping effect is impaired.
【０００７】そこで、本発明はエキゾーストチューブ支
持系の振動伝達率を低く抑えることができて、防振効果
を一段と向上することができるエキゾーストマウントラ
バーを提供するものである。Therefore, the present invention provides an exhaust mount rubber capable of suppressing the vibration transmissibility of the exhaust tube support system to a low level and further improving the vibration damping effect.
【０００８】[0008]
【課題を解決するための手段】上，下端部に形成された
ブラケット取付部と、これらブラケット取付部を連結す
る一対のブリッジ部とで略長円形に形成され、上，下ブ
ラケット部を対応するエキゾーストチューブ側のブラケ
ットと、車体側のブラケットとに連結して、エキゾース
トチューブを弾性的に吊持するマウントラバーにおい
て、前記一対のブリッジ部のばね定数をそれぞれ異なら
せて設定してある。[Means for Solving the Problems] A bracket mounting portion formed at upper and lower ends and a pair of bridge portions connecting the bracket mounting portions are formed into a substantially oval shape, and the upper and lower bracket portions correspond to each other. In a mount rubber that is connected to a bracket on the exhaust tube side and a bracket on the vehicle body side to elastically suspend the exhaust tube, the spring constants of the pair of bridge portions are set to be different from each other.
【０００９】[0009]
【作用】一対のブリッジ部のばね定数をそれぞれ異なら
せてあるため、これらブリッジ部の固有値がそれぞれ異
なって、マウントラバーの振動伝達率のピーク点が２つ
となって表れてそれぞれのピーク値が下がる。従って、
エキゾーストチューブ支持系の振動伝達率を低く抑える
ことができて、防振効果が向上される。Since the spring constants of the pair of bridge parts are different from each other, the characteristic values of these bridge parts are different from each other, and the peak points of the vibration transmissibility of the mount rubber appear as two peak values, and the respective peak values are lowered. .. Therefore,
The vibration transmissibility of the exhaust tube support system can be kept low, and the vibration damping effect is improved.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面と共に詳述す
る。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１１】図１において、１０は耐熱性のゴム材によ
り略長円形に形成したマウントラバーで、上，下端部の
挿通孔１１ａを有するブラケット取付部１１，１１と、
これらブラケット部１１，１１を連結する一対のブリッ
ジ部１２，１３とからなり、かつ、ブラケット取付部１
１，１１の内周側には突部１４，１４を対向的に突設し
て、リバウンド時にこれら突部１４，１４が弾接するこ
とによって制振効果を得るようにしてある。In FIG. 1, reference numeral 10 denotes a mount rubber formed of a heat-resistant rubber material in a substantially oval shape, and bracket mounting portions 11 and 11 having insertion holes 11a at upper and lower ends,
The bracket mounting portion 1 includes a pair of bridge portions 12 and 13 connecting the bracket portions 11 and 11.
Protrusions 14 and 14 are provided so as to face each other on the inner peripheral sides of the protrusions 1 and 11, and a vibration damping effect is obtained by elastically contacting these protrusions 14 and 14 during rebound.
【００１２】前記ブリッジ部１２，１３のうち、一方の
ブリッジ部１２は緩やかな曲線又は直線を描いて最短距
離でブラケット取付部１１，１１を連結し、他方のブリ
ッジ部１３は略くの字状に長く形成されてブラケット取
付部１１，１１を連結していて、ブリッジ部１２，１３
の長さを変えることによってこれらブリッジ部１２，１
３のばね定数を異ならせている。Of the bridge portions 12 and 13, one bridge portion 12 draws a gentle curve or a straight line to connect the bracket mounting portions 11 and 11 at the shortest distance, and the other bridge portion 13 has a substantially V shape. Is formed long to connect the bracket mounting portions 11 and 11, and the bridge portions 12 and 13
By changing the length of these bridge parts 12, 1
The spring constant of 3 is different.
【００１３】以上の実施例構造によれば、上端部側のブ
ラケット取付部１１をその挿通孔１１ａを介して車体フ
ロア３側のブラケット４に挿通，連結する一方、下端部
側のブラケット取付部１１をその挿通孔１１ａを介して
エキゾーストチューブ１側のブラケット２に挿通，連結
して、該マウントラバー１０によりエキゾーストチュー
ブ１を車体フロア３の下側に弾性的に吊持して取り付け
た場合、エキゾーストチューブ１が振動すると、マウン
トラバー１０の一対のブリッジ部１２，１３が撓み変形
してこの振動を減衰する。ここで、前記ブリッジ部１２
は短く形成してばね定数を大きく、また、ブリッジ部１
３は長く形成してばね定数を小さくしてあるため、図４
のｃ線で示すようにマウントラバー１０の振動伝達率ピ
ーク点がブリッジ部１２の固有値に相当するピーク点ｃ
1と、ブリッジ部１３の固有値に相当するピーク点ｃ2の
２つ得られ、これらブリッジ部１２，１３の固有値のピ
ーク点ｃ1，ｃ2が重ならないため、マウントラバー１０
の振動伝達率が低く抑えられる。According to the structure of the above embodiment, the bracket mounting portion 11 on the upper end portion side is inserted and connected to the bracket 4 on the vehicle body floor 3 side through the insertion hole 11a, while the bracket mounting portion 11 on the lower end portion side is inserted. When the exhaust tube 1 is elastically suspended and attached to the lower side of the vehicle body floor 3 by the mount rubber 10, the exhaust tube 1 is inserted and connected to the bracket 2 on the exhaust tube 1 side through the insertion hole 11a. When the tube 1 vibrates, the pair of bridge portions 12 and 13 of the mount rubber 10 are flexibly deformed to damp this vibration. Here, the bridge portion 12
Is short to have a large spring constant, and the bridge portion 1
3 is long and has a small spring constant.
As indicated by the c line, the peak point of the vibration transmissibility of the mount rubber 10 is the peak point c corresponding to the eigenvalue of the bridge portion 12.
1 and the peak point c 2 corresponding to the eigenvalue of the bridge portion 13 are obtained. Since the peak points c 1 and c 2 of the eigenvalues of the bridge portions 12 and 13 do not overlap, the mount rubber 10
The vibration transmissibility of is suppressed low.
【００１４】この結果、エキゾーストチューブ１の発熱
により、マウントラバー１０の振動伝達率のピーク点ｃ
1が図４の矢印で示すようにずれ動いてブラケット４の
振動伝達率のピーク点ｂ1と重なり合ったとしても、エ
キゾーストチューブ支持系の振動伝達率を低く抑えるこ
とができる。As a result, the peak point c of the vibration transmissibility of the mount rubber 10 is generated due to the heat generation of the exhaust tube 1.
Even if 1 shifts as shown by the arrow in FIG. 4 and overlaps with the peak point b 1 of the vibration transmissibility of the bracket 4, the vibration transmissibility of the exhaust tube support system can be kept low.
【００１５】図２，３は本発明の第２実施例を示すもの
で、この実施例にあっては、一方のブリッジ部１２をそ
の断面形状を細くして形成し、他方のブリッジ部１３を
その断面形状を太くして形成して、これらブリッジ部１
２，１３の断面形状を異ならせることによって、前記実
施例とは逆にブリッジ部１２のばね定数を大きくし、ブ
リッジ部１３のばね定数を小さくしてある。従って、こ
の実施例の場合にあっても、前記実施例と同様にマウン
トラバー１０の振動伝達率のピーク点が２つ得られ、エ
キゾーストチューブ支持系の振動伝達率を低く抑えて防
振効果を高めることができる。FIGS. 2 and 3 show a second embodiment of the present invention. In this embodiment, one bridge portion 12 is formed so that its cross-sectional shape is thin and the other bridge portion 13 is formed. The bridge portion 1 is formed by making the cross-sectional shape thick.
By making the cross-sectional shapes of 2 and 13 different, the spring constant of the bridge portion 12 is increased and the spring constant of the bridge portion 13 is decreased, contrary to the above embodiment. Therefore, even in the case of this embodiment, two peak points of the vibration transmissibility of the mount rubber 10 are obtained as in the case of the above-mentioned embodiment, and the vibration transmissibility of the exhaust tube support system is suppressed to a low level so that the vibration damping effect can be obtained. Can be increased.
【００１６】なお、前記各実施例の他、ブリッジ部１
２，１３のいずれか一方の略中央部分にゴム材を分断す
る金属プレートを一体に型成形し、この金属プレートの
介在によってブリッジ部１２，１３のばね定数をそれぞ
れ異ならせるようにすることもできる。In addition to the above embodiments, the bridge unit 1
It is also possible to integrally mold a metal plate that divides the rubber material into substantially the central portion of either one of 2, 2 and make the spring constants of the bridge portions 12, 13 different by interposing this metal plate. ..
【００１７】[0017]
【発明の効果】以上のように本発明によれば、一対のブ
リッジ部のばね定数をそれぞれ異ならせて設定してある
ので、マウントラバーの振動伝達率のピーク点が２つ得
られて、各ブリッジ部の固有値が重なることがないた
め、該マウントラバーの振動伝達率を小さくすることが
でき、従って、エキゾーストチューブ支持系の振動伝達
率を低く抑えて、防振効果を一段と向上することができ
る。As described above, according to the present invention, since the spring constants of the pair of bridge portions are set to be different from each other, two peak points of the vibration transmissibility of the mount rubber can be obtained, and Since the eigenvalues of the bridge portion do not overlap with each other, the vibration transmissibility of the mount rubber can be reduced. Therefore, the vibration transmissibility of the exhaust tube support system can be suppressed low, and the vibration damping effect can be further improved. ..
【図１】本発明の一実施例の斜視図。FIG. 1 is a perspective view of an embodiment of the present invention.
【図２】本発明の第２実施例の斜視図。FIG. 2 is a perspective view of a second embodiment of the present invention.
【図３】図２ＡーＡ線に沿う断面図。FIG. 3 is a sectional view taken along the line AA of FIG.
【図４】マウントラバーおよび車体側ブラケットの振動
伝達率を示すグラフ。FIG. 4 is a graph showing vibration transmissibility of a mount rubber and a vehicle body side bracket.
【図５】エキゾーストチューブのマウント状態を示す略
示的側面図。FIG. 5 is a schematic side view showing a mounted state of the exhaust tube.
【図６】従来のマウントラバーを示す斜視図。FIG. 6 is a perspective view showing a conventional mount rubber.
１…エキゾーストチューブ、２…エキゾーストチューブ
側のブラケット、３…車体フロア、４…車体フロア側の
ブラケット、１０…マウントラバー、１１…ブラケット
取付部、１２，１３…ブリッジ部。1 ... Exhaust tube, 2 ... Exhaust tube side bracket, 3 ... Vehicle body floor, 4 ... Vehicle body floor side bracket, 10 ... Mount rubber, 11 ... Bracket mounting portion, 12, 13 ... Bridge portion.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ１６Ｌ 3/215 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Office reference number FI technical display area F16L 3/215
Claims (1)
部と、これらブラケット取付部を連結する一対のブリッ
ジ部とで略長円形に形成され、上，下ブラケット部を対
応するエキゾーストチューブ側のブラケットと、車体側
のブラケットとに連結して、エキゾーストチューブを弾
性的に吊持するマウントラバーにおいて、前記一対のブ
リッジ部のばね定数をそれぞれ異ならせて設定したこと
を特徴とするエキゾーストマウントラバー。1. A bracket mounting portion formed on upper and lower ends and a pair of bridge portions connecting the bracket mounting portions are formed into a substantially oval shape, and the upper and lower bracket portions are provided on the corresponding exhaust tube side. An exhaust mount rubber in which a spring constant of the pair of bridge portions is set differently in a mount rubber that elastically hangs an exhaust tube by connecting the bracket and a bracket on the vehicle body side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332390A JPH05164166A (en) | 1991-12-17 | 1991-12-17 | Exhaust mount rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3332390A JPH05164166A (en) | 1991-12-17 | 1991-12-17 | Exhaust mount rubber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05164166A true JPH05164166A (en) | 1993-06-29 |
Family
ID=18254437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3332390A Pending JPH05164166A (en) | 1991-12-17 | 1991-12-17 | Exhaust mount rubber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05164166A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8209906B2 (en) * | 2006-06-08 | 2012-07-03 | Frederick John Romich | Noise dampener for a garage door opener |
| JP2020016285A (en) * | 2018-07-25 | 2020-01-30 | 株式会社ノーリツ | Vibration control material and heat pump unit |
-
1991
- 1991-12-17 JP JP3332390A patent/JPH05164166A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8209906B2 (en) * | 2006-06-08 | 2012-07-03 | Frederick John Romich | Noise dampener for a garage door opener |
| JP2020016285A (en) * | 2018-07-25 | 2020-01-30 | 株式会社ノーリツ | Vibration control material and heat pump unit |
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