JPH01169138A - Damper for vibration isolator - Google Patents
Damper for vibration isolatorInfo
- Publication number
- JPH01169138A JPH01169138A JP32811587A JP32811587A JPH01169138A JP H01169138 A JPH01169138 A JP H01169138A JP 32811587 A JP32811587 A JP 32811587A JP 32811587 A JP32811587 A JP 32811587A JP H01169138 A JPH01169138 A JP H01169138A
- Authority
- JP
- Japan
- Prior art keywords
- vibration
- air damper
- orifice
- damper
- amplitude
- 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
- 230000000694 effects Effects 0.000 claims abstract description 16
- 239000012528 membrane Substances 0.000 claims description 7
- 238000013016 damping Methods 0.000 abstract description 24
- 230000001788 irregular Effects 0.000 abstract 2
- 230000003321 amplification Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/0472—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by comprising a damping device
- F16F9/0481—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall characterised by comprising a damping device provided in an opening to the exterior atmosphere
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、入力される振動の振幅の変化に応じて最適
の減衰効果が得られる防振装置用ダンパーに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a damper for a vibration isolator that can obtain an optimal damping effect according to changes in the amplitude of input vibration.
従来、観光バス等の車両に搭載されているオーディオ機
器においては、車両走行時の路面から伝達される振動に
よる影響を防止する防振装置が付属している。2. Description of the Related Art Conventionally, audio equipment mounted on a vehicle such as a sightseeing bus is attached with a vibration isolating device that prevents the influence of vibrations transmitted from the road surface when the vehicle is running.
第１図は、車両に搭載されたオーディオ機器１を、防振
装置としてばね部材３を用いて車体２に支持した状態を
示し、このばね部材３により車体２からオーディオ機器
１に伝えられる振動の加速度を低減するようにしである
。FIG. 1 shows a state in which an audio device 1 mounted on a vehicle is supported on a vehicle body 2 using a spring member 3 as a vibration isolator. This is to reduce acceleration.
また、車両の振動は、路面状態の変化に応じて一定では
なく、必ずばね部材３の共振が起こるため、共振時にお
ける増幅を少なくする必要があり、減衰装置としてエア
ダンパー４を併用している。In addition, the vibration of the vehicle is not constant depending on changes in road surface conditions, and resonance of the spring member 3 always occurs, so it is necessary to reduce the amplification during resonance, and an air damper 4 is also used as a damping device. .
従来の車両搭載オーディオ機器に対する防振装置の減衰
用として使用されているエアダンパー４は、第５図に示
すように、ベローズ状のゴム膜５の上下両端部をそれぞ
れ上面板６と下面板７とにより密閉して空気室８を形成
し、上面板６に開口するオリフィス９を介して空気室８
を大気に連通させた構造になっている。As shown in FIG. 5, an air damper 4 used for damping vibration isolators for conventional vehicle-mounted audio equipment has a bellows-shaped rubber membrane 5 with upper and lower ends connected to an upper plate 6 and a lower plate 7, respectively. The air chamber 8 is sealed through an orifice 9 opened in the top plate 6.
It has a structure that communicates with the atmosphere.
このエアダンパーは、振動により加圧された空気室８内
の空気がオリフィス９から大気中に流出する時の絞り効
果により振幅を減衰するものであるから、振幅の大きさ
とオリフィスの口径との間には一定の関係があり、振幅
の大きさに対応する口径のオリフィスをもつエアダンパ
ーを使用しなければ最適の減衰効果を得ることができな
い。This air damper attenuates the amplitude by a throttling effect when the air in the air chamber 8 pressurized by vibration flows out into the atmosphere from the orifice 9. Therefore, there is a difference between the magnitude of the amplitude and the diameter of the orifice. There is a certain relationship between the two, and the optimum damping effect cannot be obtained unless an air damper has an orifice with a diameter corresponding to the magnitude of the amplitude.
ところが、従来のエアダンパーは、特定の口径のオリフ
ィスをもつ単１型のものが使用されているため、振幅の
大きさが異なる振動が発生する車両の減衰装置としては
減衰効果にばらつきができ、実用価値に乏しいという欠
点がある。However, because conventional air dampers are single-type air dampers with orifices of specific diameters, the damping effect varies when used as a damping device for vehicles that generate vibrations with different amplitudes. The drawback is that it has little practical value.
この発明は上記の欠点を解消して、振動振幅の変化に応
じてそれぞれ最適の減衰効果が得られる防振装置用ダン
パーを提供することを目的とする。An object of the present invention is to eliminate the above-mentioned drawbacks and provide a damper for a vibration isolator that can obtain optimal damping effects depending on changes in vibration amplitude.
この発明の防振装置用ダンパーは、オリフィスの口径が
異なる複数個のエアダンパーを振動方向に対して直列に
接続し、各エアダンパーのオリフィスの口径を、減衰対
象とされる振幅の異なる振動のそれぞれの振幅に対して
最適の絞り効果を有する大きさに設定している。The damper for a vibration isolator of the present invention connects a plurality of air dampers having different orifice diameters in series in the vibration direction, and adjusts the orifice diameter of each air damper to damp vibrations with different amplitudes. The size is set to have the optimum aperture effect for each amplitude.
以下、この発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第２図は、この発明の第１実施例を示し、２個のエアダ
ンパー１０．２０を振動方向に対して直列に接続しであ
る。これらのエアダンパー１０゜２０はいずれもベロー
ス状のゴム膜１１．２１による空気室１２，２２．が形
成され、上段側のエアダンパー１０は上面板１３にオリ
フィス１５を設け、下段側のエアダンパー２０は下面板
２３にオリフィス２５を設けである。各エアダンパー１
０゜２０のオリフィス１５．２５はその口径が異なり、
上段側のエアダンパーｌＯのオリフィス１５の口径より
も下段側のエアダンパー２０のオリフィス２５の口径が
大きく設定されている。FIG. 2 shows a first embodiment of the invention, in which two air dampers 10 and 20 are connected in series in the vibration direction. These air dampers 10.20 each have air chambers 12, 22. The upper air damper 10 has an orifice 15 on the upper plate 13, and the lower air damper 20 has an orifice 25 on the lower plate 23. Each air damper 1
The 0°20 orifice 15.25 differs in its diameter,
The diameter of the orifice 25 of the air damper 20 on the lower stage side is set larger than the diameter of the orifice 15 of the air damper 10 on the upper stage side.
上段側のエアダンパーＩＯは小振幅の振動減衰用であっ
て、そのオリフィス１５の口径は、通常の舗装路面走行
時の振動に対して最適の絞り減衰効果が得られる大きさ
に設定されている。The air damper IO on the upper stage side is for damping small-amplitude vibrations, and the diameter of its orifice 15 is set to a size that provides the optimum damping effect against vibrations during normal driving on paved roads. .
下段側のエアダンパー２０は大振幅の振動減衰用であっ
て、そのオリフィス２５の口径は、凹凸路面走行時また
は急ブレーキによる減速時の振動に対して最適の絞り減
衰効果が得られる大きさに設定されている。The air damper 20 on the lower stage side is for damping large amplitude vibrations, and the diameter of its orifice 25 is set to a size that provides an optimal throttle damping effect against vibrations when driving on an uneven road or decelerating due to sudden braking. It is set.
上記のようにオリフィス口径の異なる２種のエアダンパ
ー１０．２０が振動方向に対して直列に接続されている
ため、舗装路面走行時に入力される振動は、主として上
段側のエアダンパーｌＯが作動して減衰され、凹凸路面
走行時や急ブレーキによる減速時における振動が入力さ
れた場合は、上段側のエアダンパーｌＯによる防振性能
の低下を来すことなく下段側のエアダンパー２０が作動
して減衰されることになる。As mentioned above, since the two types of air dampers 10 and 20 with different orifice diameters are connected in series in the vibration direction, the vibration input when driving on a paved road is mainly caused by the operation of the upper air damper IO. When vibrations are input when driving on an uneven road surface or decelerating due to sudden braking, the lower air damper 20 operates without deteriorating the vibration isolation performance of the upper air damper IO. It will be attenuated.
なお、各エアダンパー１０．２０のゴム膜１１゜２１の
剛性を異ならせ、下段側のエアダンパー２０の剛性を上
段側のエアダンパー１０の剛性よりも大きくするのが好
ましく、このようにすれば、小振幅の振動が生じたとき
に上段側のエアダンパー１０をより有効に作動させるこ
とができる。In addition, it is preferable that the rigidity of the rubber membranes 11.21 of each air damper 10.20 is made different, and the rigidity of the lower air damper 20 is made greater than the rigidity of the upper air damper 10. , the air damper 10 on the upper stage side can be operated more effectively when vibrations of small amplitude occur.
第３図はこの発明の第２実施例を示し、上段側に大振幅
の振動減衰用のエアダンパー２０を配置し、下段側に小
振幅の振動減衰用のエアダンパー１０を配置している。FIG. 3 shows a second embodiment of the present invention, in which an air damper 20 for damping large-amplitude vibrations is arranged on the upper stage side, and an air damper 10 for damping small-amplitude vibrations is arranged on the lower stage side.
上段側のエアダンパー２０のオリフィス２５は上面板２
４に設け、上段側のエアダンパー１０のオリフィス１５
は共通の中間板２６に設けである。The orifice 25 of the air damper 20 on the upper stage side is connected to the upper surface plate 2.
4 and the orifice 15 of the air damper 10 on the upper stage side.
are provided on the common intermediate plate 26.
上記以外の構成については第１実施例と同一であり作用
も同一であるから、対応する同一部分に同一符号を付す
に止め、説明を省略する。Since the configuration other than the above is the same as the first embodiment and the operation is also the same, the same reference numerals are given to the corresponding parts and the explanation will be omitted.
第４図はこの発明の第３実施例を示し、３個のエアダン
パー１０．３０．２０を振動方向に対して直列に接続し
である。FIG. 4 shows a third embodiment of the invention, in which three air dampers 10, 30, 20 are connected in series in the vibration direction.
上段側のエアダンパー１０は小振幅の振動減衰用、中段
側のエアダンパー３０は中振幅の振動減衰用、下段側の
エアダンパー２０は大振幅の振動用である。The air damper 10 on the upper stage is used for damping small amplitude vibrations, the air damper 30 on the middle stage is used for damping vibrations with medium amplitude, and the air damper 20 on the lower stage is used for damping vibrations with large amplitude.
各段のエアダンパー１０．３０．２０のオリフィス１５
，３５．２５は、それぞれゴム膜１１゜３１．２１に設
けてあり、各オリフィス１５．３５．２５の口径は、そ
れぞれの振幅の減衰に最適の絞り効果が得られる大きさ
に設定されている。Orifice 15 of each stage air damper 10.30.20
, 35.25 are provided on the rubber membrane 11° 31.21, respectively, and the aperture of each orifice 15.35.25 is set to a size that provides the optimum throttling effect for damping the respective amplitudes. .
この実施例によると、小振幅と大振幅の振動だけでなく
、その中間の振幅の振動に対しても減衰効果を得ること
ができる。According to this embodiment, it is possible to obtain a damping effect not only for vibrations of small amplitude and large amplitude, but also for vibrations of an intermediate amplitude.
以上説明したように、この発明によれば、入力される振
動振幅に大きさに応じて、それぞれに最適の口径のオリ
フィスをもつエアダンパーが作動するから、振動振幅が
変化しても有効な減衰作用が行われ、防振装置の共振時
における増幅を最小限度に抑制することが可能となり、
しかも簡単な構造で安価に製作できることと相まって実
用性の高い防振装置用ダンパーが得られる。As explained above, according to the present invention, an air damper having an orifice of an optimal diameter operates depending on the magnitude of the input vibration amplitude, so even if the vibration amplitude changes, effective damping can be achieved. This makes it possible to suppress the amplification of the vibration isolator to a minimum when it resonates.
In addition, the damper has a simple structure and can be manufactured at low cost, making it possible to obtain a highly practical damper for a vibration isolator.
第１図は、防振装置用ダンパーの使用例を示す平面図、
第２図ないし第４図は、それぞれこの発明の実施例を示
す縦断面図、第５図は、従来のエアダンパーを示す縦断
面図である。
図中、１０は小振幅用のエアダンパー、１１はゴムｎ％
、１２は空気室、１５はオリフィス、２゜は大振幅用の
エアダンパー、２１はゴム膜、２２は空気室、２５はオ
リフィスである。
特許出願人 横浜ゴム株式会社
代理人 弁理士 森 哲 也
代理人 弁理士 内 藤 嘉 昭
代理人 弁理士 清 水 正FIG. 1 is a plan view showing an example of the use of a damper for a vibration isolator;
2 to 4 are longitudinal sectional views showing embodiments of the present invention, and FIG. 5 is a longitudinal sectional view showing a conventional air damper. In the figure, 10 is an air damper for small amplitude, 11 is rubber n%
, 12 is an air chamber, 15 is an orifice, 2° is an air damper for large amplitude, 21 is a rubber membrane, 22 is an air chamber, and 25 is an orifice. Patent applicant Yokohama Rubber Co., Ltd. Agent Patent attorney Tetsuya Mori Agent Patent attorney Yoshiaki Naito Attorney Patent attorney Tadashi Shimizu
Claims (2)
大気に連通させるオリフィスとを備え、オリフィスの口
径がそれぞれ異なる複数個のエアダンパーを振動方向に
対して直列に接続し、各エアダンパーのオリフィスの口
径を、減衰対象とされる振幅の異なる振動のそれぞれの
振幅に対して最適の絞り効果を有する大きさに設定した
ことを特徴とする防振装置用ダンパー。(1) Equipped with an air chamber formed by a rubber membrane and an orifice that communicates this air chamber with the atmosphere, a plurality of air dampers each having a different orifice diameter are connected in series in the vibration direction, and each air damper is connected in series in the vibration direction. A damper for a vibration isolator, characterized in that the diameter of the orifice of the damper is set to a size that provides an optimal throttling effect for each of the different amplitudes of vibrations to be damped.
剛性よりも、オリフィス口径の大きいエアダンパーのゴ
ム膜の剛性を大きくした特許請求の範囲第１項記載の防
振装置用ダンパー。(2) The damper for a vibration isolator according to claim 1, wherein the rigidity of the rubber membrane of the air damper with a large orifice diameter is greater than the rigidity of the rubber membrane of the air damper with a small orifice diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32811587A JPH01169138A (en) | 1987-12-24 | 1987-12-24 | Damper for vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32811587A JPH01169138A (en) | 1987-12-24 | 1987-12-24 | Damper for vibration isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01169138A true JPH01169138A (en) | 1989-07-04 |
Family
ID=18206657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32811587A Pending JPH01169138A (en) | 1987-12-24 | 1987-12-24 | Damper for vibration isolator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01169138A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11041538B2 (en) | 2017-09-28 | 2021-06-22 | Mitsubishi Electric Corporation | Vibration propagation suppressing apparatus |
-
1987
- 1987-12-24 JP JP32811587A patent/JPH01169138A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11041538B2 (en) | 2017-09-28 | 2021-06-22 | Mitsubishi Electric Corporation | Vibration propagation suppressing apparatus |
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