JPH0729323Y2 - Liquid damping type anti-vibration device - Google Patents
Liquid damping type anti-vibration deviceInfo
- Publication number
- JPH0729323Y2 JPH0729323Y2 JP800590U JP800590U JPH0729323Y2 JP H0729323 Y2 JPH0729323 Y2 JP H0729323Y2 JP 800590 U JP800590 U JP 800590U JP 800590 U JP800590 U JP 800590U JP H0729323 Y2 JPH0729323 Y2 JP H0729323Y2
- Authority
- JP
- Japan
- Prior art keywords
- partition plate
- liquid
- elastic
- elastic thin
- thin film
- 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.)
- Expired - Fee Related
Links
Landscapes
- Combined Devices Of Dampers And Springs (AREA)
Description
【考案の詳細な説明】 [産業上の利用分野] 本考案は、自動車用のエンジンマウント等に好適に使用
される液体減衰式防振装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a liquid damping type vibration damping device which is preferably used for engine mounts for automobiles.
[従来の技術] 従来より、自動車のエンジンを、その振動を車体へ伝達
させないように支承するマウント等の防振装置として、
ゴム製基体の内部に仕切板によって隔された上下2つの
液室を設け、前記仕切板に所要の長さと断面積を持った
オリフィスを設けて、両液室を連通させた構造の所謂液
体減衰式の防振装置が知られている。[Prior Art] Conventionally, as an anti-vibration device such as a mount for supporting an automobile engine so as not to transmit its vibration to a vehicle body,
A so-called liquid damping structure in which two upper and lower liquid chambers separated by a partition plate are provided inside a rubber base, and an orifice having a required length and cross-sectional area is provided in the partition plate so that both liquid chambers communicate with each other. Anti-vibration devices are known.
[考案が解決しようとする課題] ところで、上記方式の防振装置は、ゴム製基体の弾性と
液体の流動性によって減衰効果を出すものであり、自動
車の通常走行時のエンジン振動に対する制振効果を大き
くするために、そのエンジン振動の周波数域に対応する
10Hz付近にオリフィス内液体の共振周波数を与え、高に
減衰力を得るようにしている。[Problems to be Solved by the Invention] By the way, the vibration damping device of the above-described system exerts a damping effect by the elasticity of the rubber base and the fluidity of the liquid, and the damping effect against the engine vibration during normal driving of the automobile. Corresponding to the frequency range of the engine vibration in order to increase
The resonance frequency of the liquid in the orifice is given to around 10Hz to obtain a high damping force.
このようにした場合、それより若干高い周波数域にある
エンジンアイドリング時の振動域、例えば20〜30Hzの微
小振幅で、防振装置としての動的ばね定数が高まり、エ
ンジンアイドリング振動が車体に伝達されることにな
る。In this case, the vibration range during engine idling in a slightly higher frequency range, for example, a small amplitude of 20 to 30 Hz, increases the dynamic spring constant as a vibration isolator, and the engine idling vibration is transmitted to the vehicle body. Will be.
そこで本考案の目的は、この種の液体減衰式の防振装置
として、自動車の通常走行時の減衰性能等の特性に優れ
るとともに、エンジンアイドリング時等の微小振幅の振
動時には、液体封入室内に小空気室を形成し得てその特
性を容易に変化させることができ、微小振幅振動時の防
振特性にも優れたものとなし得る、制御容易な液体減衰
式防振装置を提供することにある。Therefore, the object of the present invention is to provide a liquid damping type vibration damping device of this type, which has excellent characteristics such as damping performance during normal driving of an automobile, and is small in the liquid filled chamber during vibration with a small amplitude such as during engine idling. An object of the present invention is to provide an easily controllable liquid damping type vibration damping device that can form an air chamber and can easily change its characteristics, and that can also have excellent vibration damping characteristics during minute amplitude vibrations. .
[課題を解決するための手段] 本考案は、防振用のゴム製基体と、弾性可撓部材を結合
して内部に室を形成するとともに該室内に液体を封入
し、前記ゴム製基体と前記弾性可撓部材間に仕切板を介
装して前記液体封入室を上下液室に画成し、該仕切板に
オリフィスを形成して上下両液室を連通せしめてなる液
体減衰式防振装置において、上記の課題を解決するため
に次の構成を採用することとした。[Means for Solving the Problems] The present invention relates to a rubber base body for vibration isolation and an elastic flexible member that are combined to form a chamber inside and a liquid is enclosed in the chamber to form a rubber base body. A liquid-damping type vibration damping device in which a partition plate is interposed between the elastic flexible members to define the liquid sealing chamber into upper and lower liquid chambers, and an orifice is formed in the partition plate to connect the upper and lower liquid chambers to each other. In the device, the following configuration was adopted to solve the above problems.
すなわち、オリフィスの上下液室への開口部を除く仕切
板の両面に、該面に密接する可撓性の弾性薄膜を周縁部
シール状態に装着し、この両弾性薄膜内の仕切板に貫通
孔を設けるとともにこの貫通孔を外気と連通せしめ、さ
らに前記弾性可撓部材の外面と有底の受支器体との間を
空気の給排可能な空気室となし、この空気室内を負圧状
態にしたとき、前記弾性薄膜が仕切板より離間して仕切
板との間に小空気室を形成するようになしたことを特徴
とする。That is, flexible elastic thin films that are in close contact with the surfaces are attached to both sides of the partition plate excluding the openings of the orifices to the upper and lower liquid chambers, and the partition plates in both elastic thin films have through holes. Is provided and the through hole is communicated with the outside air, and an air chamber capable of supplying and discharging air is formed between the outer surface of the elastic flexible member and the bottomed receiver body, and this air chamber is in a negative pressure state. In this case, the elastic thin film is separated from the partition plate to form a small air chamber with the partition plate.
前記において、弾性薄膜は、ゴム製基体に静荷重が負荷
されていない状態において、弾性薄膜と仕切板との間に
空隙を有し、荷重が負荷された状態で仕切板に密接状態
となるように設けることができる。In the above, the elastic thin film has a gap between the elastic thin film and the partition plate in a state where no static load is applied to the rubber base, so that the elastic thin film is brought into close contact with the partition plate when the load is applied. Can be provided.
さらに弾性薄膜の外側には、その動きを制限する有孔板
や網体等よりなる通水自在なストッパー部材を配してお
くのが好ましい。Further, it is preferable to dispose a water-permeable stopper member composed of a perforated plate, a net body or the like, which restricts the movement, on the outer side of the elastic thin film.
[作用] 上記した本考案の防振装置によれば、弾性可撓部材外側
の空気室に大気圧を導入した通常時は、仕切板両面に装
着された可撓性の弾性薄膜は仕切板に密接している。例
えばエンジン搭載荷重がゴム製基体に負荷されることに
より、この荷重を受けるゴム製基体と弾性可撓部材部材
の弾性力とで、内部液体に圧力が作用して弾性薄膜が仕
切板に密接し、仕切板に有する貫通孔を閉塞した状態を
維持する。そのため、仕切板両側に小空気室を有さず、
液体封入室に小空気室を有さない場合と同様の作用を果
す。[Operation] According to the above-described vibration isolator of the present invention, when atmospheric pressure is introduced into the air chamber outside the elastic flexible member, the flexible elastic thin films mounted on both sides of the partition plate are normally attached to the partition plate. Close. For example, when the load mounted on the engine is applied to the rubber base, pressure is applied to the internal liquid by the rubber base receiving the load and the elastic force of the elastic flexible member member, and the elastic thin film is brought into close contact with the partition plate. , The state in which the through hole of the partition plate is closed is maintained. Therefore, there is no small air chamber on both sides of the partition plate,
The same effect is achieved as when the liquid sealing chamber does not have a small air chamber.
そして、前記弾性可撓部材の外側に有する空気室内を空
気排出により負圧状態にすると、弾性可撓部材による内
部液体に対する圧力が減じ、外気と連通する貫通孔部分
との圧力差により仕切板両面の弾性薄膜が仕切板から離
間してその間に外気が流入し、仕切板とその両面に装着
された弾性薄膜とで画された小空気室が形成される。こ
の小空気室の存在により、ゴム等のゴム製基体の弾性を
低くしたのと同じ作用を果すことになる。When the air chamber inside the elastic flexible member is made into a negative pressure state by exhausting air, the pressure of the elastic flexible member against the internal liquid is reduced, and the pressure difference between the through hole portion communicating with the outside air causes the partition plate both surfaces The elastic thin film is separated from the partition plate, and the outside air flows in between the partition plate and the small air chamber defined by the partition plate and the elastic thin films mounted on both surfaces of the partition plate. Due to the presence of the small air chamber, the same effect as that of lowering the elasticity of the rubber base such as rubber is achieved.
従って、弾性可撓部材外側の空気室内に大気圧を導入し
た通常時と、空気を排出して負圧を導入した場合とで、
防振装置として減衰性能や特性を大きく変化させること
ができる。Therefore, in the normal time when the atmospheric pressure is introduced into the air chamber outside the elastic flexible member and when the negative pressure is introduced by discharging the air,
The damping performance and characteristics of the anti-vibration device can be greatly changed.
例えば、エンジンアイドリング時等の微小振幅の振動時
には、空気室内の空気排出により負圧導入状態にして、
仕切板両側に小空気室を形成することにより、エンジン
の微振動に伴う液体の変動が小空気室の薄膜の動きに吸
収されて、オリフィスを通過する液体の移動がほとんど
なくなり、20〜30Hzの微小振幅の高周波数域において
も、動的ばね定数の上昇が生じず、振動が車体に伝達さ
れないことになる。For example, at the time of vibration with a small amplitude such as when the engine is idling, the negative pressure is introduced by discharging the air in the air chamber,
By forming the small air chambers on both sides of the partition plate, the fluctuation of the liquid due to the slight vibration of the engine is absorbed by the movement of the thin film in the small air chamber, and the movement of the liquid passing through the orifice is almost eliminated, and the 20-30Hz Even in a high frequency range with a small amplitude, the dynamic spring constant does not increase and the vibration is not transmitted to the vehicle body.
また弾性薄膜の外側に、その動き、特に膨張を制限する
通水自在なストッパー部材を配してある場合は、空気室
を負圧導入状態にしたときの弾性薄膜の過度の膨張変形
を規制でき、延いては小空気室の容量を制限できる。If a stopper member that restricts the movement of the elastic thin film, especially the expansion, is arranged outside the elastic thin film, excessive expansion and deformation of the elastic thin film when the negative pressure is introduced into the air chamber can be regulated. As a result, the capacity of the small air chamber can be limited.
[実施例] 次に本考案の実施例を図面に基いて説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
第1図は本考案の1実施例の液体減衰式防振装置の断面
図を示している。FIG. 1 shows a sectional view of a liquid damping type vibration damping device according to one embodiment of the present invention.
同図において、(1)は防振用のゴム製基体であり、下
面は凹曲面状に形成され、上部には自動車用エンジン等
の支承対象物に対する取付ボルト(2a)を有する取付け
金具(2)が固設され、また下部のテーパ状をなす外周
にはゴム製基体(1)より下方に筒状に延びた外筒金具
(3)が固設されている。In the figure, (1) is a rubber base body for vibration proof, the lower surface is formed into a concave curved surface, and the upper part is a mounting bracket (2a) for mounting a bearing object such as an automobile engine. ) Is fixed, and an outer cylindrical metal fitting (3) extending in a cylindrical shape below the rubber base (1) is fixed to the outer periphery of the lower taper.
(4)は車体やフレーム等に対する取付ボルト(4a)を
有する断面略凹状をなす有底の受支器体であり、その開
口端部(4b)に前記ゴム製基体(1)の外筒金具(3)
の下端部が結合されている。Reference numeral (4) is a bottomed receiver body having a substantially concave cross section having mounting bolts (4a) for a vehicle body, a frame, etc., and an opening end portion (4b) of the outer cylindrical metal fitting of the rubber base body (1). (3)
The lower ends of are joined.
(5)は前記の受支器体(4)の上部開口を閉塞するよ
うに設けられた膜壁状の弾性可撓部材であり、この弾性
可撓部材(5)が前記の受支器体(4)と外筒金具
(3)との結合部に挾着されて取り付けられ、前記ゴム
製基体(1)と外筒金具(3)を介して結合されてお
り、この弾性可撓部材(5)とゴム製基体(1)との間
に室が形成され、該室内に液体(6)が封入されてい
る。(5) is a membrane wall-shaped elastic flexible member provided so as to close the upper opening of the receiver body (4), and this elastic flexible member (5) is the receiver body. The elastic flexible member (4) is attached to the joint between the outer tubular metal fitting (3) and the rubber base (1) via the outer tubular metal fitting (3). A chamber is formed between 5) and the rubber substrate (1), and the liquid (6) is enclosed in the chamber.
また前記弾性可撓部材(5)の外面と前記有底の受支器
体(4)との間の空間が後述するように空気給排可能な
空気室(7)として形成されている。Further, a space between the outer surface of the elastic flexible member (5) and the bottomed receiver body (4) is formed as an air chamber (7) capable of supplying and discharging air as described later.
(8)は前記弾性可撓部材(5)とゴム製基体(1)と
の間の液体封入室(9)を上下2つの液室(9a)(9b)
に仕切る剛体よりなる仕切板であり、この仕切板(8)
は外筒金具(3)の内周に嵌合されるとともに、外周端
縁が前記弾性可撓部材(5)の周縁と共に前記受支器体
(4)と外筒金具(3)との間に挾着され保持されてい
る。(8) is a liquid filling chamber (9) between the elastic flexible member (5) and the rubber base body (1), and upper and lower liquid chambers (9a) and (9b).
A partition plate made of a rigid body that is partitioned into two parts. This partition plate (8)
Is fitted to the inner circumference of the outer tubular metal fitting (3), and the outer peripheral edge is between the receiver body (4) and the outer tubular metal fitting (3) together with the peripheral edge of the elastic flexible member (5). Is held and held by.
前記の仕切板(7)の外周部には、一方の液室(9a)に
開口(10a)しかつ外周部を所要角度変位して他方の液
室(9b)に開口(10b)するオリフィス(10)が設けら
れており、これにより液体(6)が両液室(9a)(9b)
間を自由に流通移動できるようになっている。In the outer peripheral portion of the partition plate (7), an orifice (10a) that opens in one liquid chamber (9a) and is displaced (10b) in the other liquid chamber (9b) by displacing the outer peripheral portion by a required angle ( 10) is provided so that the liquid (6) can be stored in both liquid chambers (9a) (9b).
It can be freely distributed and moved between.
(11a)(11b)はゴム等の適度に弾性を有する可撓性の
材料からなる弾性薄膜であって、前記のオリフィス(1
0)の開口部が存する外周部を除く仕切板(8)の内方
部両面に、それぞれ該面に密接するように周縁部シール
状態で装着されている。この弾性薄膜(11a)(11b)内
における仕切板(8)には上下に貫通する貫通孔(12)
が1〜複数個設けられている。この一つの貫通孔(12)
が径方向の通気路(13)を介して外気と連通せしめられ
ており、通常時、即ち前記空気室(7)が大気圧導入状
態にある時には、弾性薄膜(11a)(11b)が仕切板
(8)と密接状態を維持し、また空気室(7)が負圧導
入状態になると、弾性薄膜(11a)(11b)が仕切板
(8)より離間して仕切板(8)との間に空気が導入さ
れ(第1図鎖線)、小空気室(14a)(14b)を形成する
ように設けられている。第2図および第3図に示す仕切
板(8)においては、複数の貫通孔(12)が仕切板
(8)の表面に有する溝(12a)により連通せしめられ
ている。(11a) and (11b) are elastic thin films made of a flexible material having appropriate elasticity such as rubber, and the orifice (1
The partition plate (8) is mounted on both inner surfaces of the partition plate (8) except the outer peripheral portion where the opening of (0) is present, in a peripheral edge sealed state so as to be in close contact with the respective surfaces. A through hole (12) vertically penetrating the partition plate (8) in the elastic thin films (11a) and (11b).
1 to a plurality of are provided. This one through hole (12)
Is communicated with the outside air through a radial ventilation path (13), and in normal times, that is, when the air chamber (7) is in an atmospheric pressure introduction state, the elastic thin films (11a) (11b) are separated by partition plates. When the air chamber (7) is brought into a negative pressure introducing state while maintaining a close contact with (8), the elastic thin films (11a) and (11b) are separated from the partition plate (8) and between the partition plate (8). Air is introduced into the chamber (chain line in FIG. 1) to form small air chambers (14a) and (14b). In the partition plate (8) shown in FIGS. 2 and 3, a plurality of through holes (12) are communicated with each other by a groove (12a) provided on the surface of the partition plate (8).
前記空気室(7)の大気および負圧導入手段として、受
支器体(4)の一部に空気の排出および導入用の通路
(15)が設けられ、この通路(15)に負圧導入時の空気
排出を行なう吸引手段(16)が接続されている。この吸
引手段(16)は、例えば本考案装置をエンジンマウント
に使用する場合、エンジンの低回転信号あるいは走行停
止信号によって作動するように構成される。As a means for introducing atmospheric pressure and negative pressure in the air chamber (7), a passage (15) for discharging and introducing air is provided in a part of the receiver (4), and negative pressure is introduced into this passage (15). A suction means (16) for discharging air at the time is connected. The suction means (16) is configured to be actuated by an engine low rotation signal or a travel stop signal when the device of the present invention is used for an engine mount, for example.
なお、前記仕切板(8)に装着される弾性薄膜(11a)
(11b)としては、ゴム製基体(1)にエンジン搭載等
による静荷重が負荷していない状態においても、空気室
(7)が大気圧導入状態であれば仕切板(8)に密接す
るように形成しておくほか、ゴム製基体(1)にエンジ
ン搭載等による静荷重が負荷していない状態では弾性薄
膜(11a)(11b)と仕切板(8)の両面との間に若干の
空隙を有し、静荷重が負荷された状態において、仕切板
(8)に対し密接するように設けることができる。The elastic thin film (11a) attached to the partition plate (8)
As (11b), the rubber base (1) should be in close contact with the partition plate (8) when the air chamber (7) is in the atmospheric pressure introduced state even when a static load due to engine mounting or the like is not applied. In addition, the rubber base (1) has a slight gap between the elastic thin films (11a) (11b) and both sides of the partition plate (8) when a static load due to engine mounting is not applied to the rubber base (1). Can be provided so as to be in close contact with the partition plate (8) in the state where a static load is applied.
また、弾性可撓部材(5)の弾性力で液体に対し適度の
圧力を与えて、弾性薄膜(11a)(11b)を仕切板(8)
に密接させることもできる。その手段として第4図の実
施例は、前記弾性可撓部材(5)を厚肉にして具有弾性
力を大きくした場合を示し、また第5図の実施例は弾性
可撓部材(5)の外側にスプリング等のバネ手段(17)
を配して弾性力を付与した場合を示している。これらの
場合にも、空気室(7)に負圧を導入することにより、
弾性可撓性部材(5)自体の弾性力あるいはバネ手段
(17)に抗して、弾性薄膜(11a)(11b)を仕切板
(8)より離間させ得るように設定しておく(第4図お
よび第5図の実線の状態)。In addition, the elastic force of the elastic flexible member (5) exerts an appropriate pressure on the liquid to separate the elastic thin films (11a) and (11b) from the partition plate (8).
Can be closely attached to. As a means therefor, the embodiment of FIG. 4 shows a case where the elastic flexible member (5) is made thick to increase the elastic force, and the embodiment of FIG. 5 shows the elastic flexible member (5). Spring means such as springs on the outside (17)
Shows the case where elastic force is applied by arranging. Also in these cases, by introducing a negative pressure into the air chamber (7),
It is set so that the elastic thin films (11a) (11b) can be separated from the partition plate (8) against the elastic force of the elastic flexible member (5) itself or the spring means (17) (fourth). And the solid line in FIG. 5).
また仕切板(8)と前記薄膜(11a)(11b)の互いの対
接面は、図に示すように空気室(7)が大気圧導入状態
において、薄膜(11a)(11b)が仕切板(8)の面に対
し弛みを生じることなく密接するように形成する。Further, as shown in the figure, the mutual contact surfaces of the partition plate (8) and the thin films (11a) and (11b) are such that the thin films (11a) and (11b) are the partition plates when the air chamber (7) is at atmospheric pressure. It is formed so as to come into close contact with the surface of (8) without causing slack.
さらに、上記いずれの実施例の場合も、第6図に例示す
るように、弾性薄膜(11a)(11b)の外側に有孔板もし
くは網体その他の通水自在なストッパー部材(18)を配
し、弾性薄膜(11a)(11b)の動き、膨張変形を制限す
ることができる。このストッパー部材(18)は、図のよ
うに弾性薄膜(11a)(11b)の膨張時の形態に沿うよう
に形成しておくのが望ましい。Further, in any of the above embodiments, as shown in FIG. 6, a perforated plate, a net or other water-permeable stopper member (18) is arranged outside the elastic thin films (11a) (11b). However, the movement and expansion deformation of the elastic thin films (11a) (11b) can be limited. It is desirable that the stopper member (18) is formed so as to follow the shape of the elastic thin films (11a) and (11b) at the time of expansion, as shown in the figure.
上記の構成よりなる本考案の防振装置を自動車のエンジ
ンマウントに使用した場合において、空気室(7)が大
気圧を導入した通常状態では、仕切板(8)両面の弾性
薄膜(11a)(11b)が仕切板(8)に密接した状態に保
持されて、連通路(13)により外気と連通している貫通
孔(12)が弾性薄膜(11a)(11b)によって閉塞された
状態に保持され(第1図は実線、第4図と第5図は鎖
線)、空気室(11a)(11b)を有さない場合と同様に、
液室(9a)内の液体(6)がゴム製基体(1)の振動に
伴ってオリフィス(10)を通って他方の液室(9b)に移
動するもので、従来同様に10Hz付近の周波数域で損失ば
ね定数の値が大きくなり、大きな減衰効果を示す。When the anti-vibration device of the present invention having the above structure is used for an engine mount of an automobile, the elastic thin films (11a) (11a) on both sides of the partition plate (8) in a normal state where the air chamber (7) introduces atmospheric pressure. 11b) is kept in close contact with the partition plate (8), and the through hole (12) communicating with the outside air by the communication passageway (13) is kept closed by the elastic thin films (11a) (11b). (FIG. 1 is a solid line, FIGS. 4 and 5 are chain lines), and like the case without the air chambers (11a) and (11b),
The liquid (6) in the liquid chamber (9a) moves to the other liquid chamber (9b) through the orifice (10) along with the vibration of the rubber base body (1). The value of the loss spring constant becomes large in the range and shows a large damping effect.
そして、空気室(7)を空気排出により負圧導入状態に
すると、弾性可撓部材(5)による内部液体(6)に対
する圧力も減圧され、外気と通じる貫通孔(12)部分と
の圧力差により仕切板両面の弾性薄膜(11a)(11b)が
仕切板(8)から離間してその間に空気が流入し、仕切
板(8)の両側に仕切板(8)と弾性薄膜(11a)(11
b)とで画された小空気室(14a)(14b)が形成される
(第1図は鎖線、第4図及び第5図は実線)。この小空
気室(14a)(14b)の存在により、ゴム製基体(1)の
弾性を低くしたのと同じ作用を果すことになる。Then, when the air chamber (7) is brought into a negative pressure introduction state by exhausting air, the pressure on the internal liquid (6) by the elastic flexible member (5) is also reduced, and the pressure difference with the through hole (12) portion communicating with the outside air. Thus, the elastic thin films (11a) (11b) on both sides of the partition plate are separated from the partition plate (8), and air flows in between the partition plates (8) and the partition plates (8) and the elastic thin films (11a) () on both sides of the partition plate (8). 11
Small air chambers (14a) and (14b) defined by (b) and (b) are formed (a chain line in FIG. 1, solid lines in FIGS. 4 and 5). Due to the presence of the small air chambers (14a) and (14b), the same effect as that of lowering the elasticity of the rubber base body (1) is achieved.
すなわち前記小空気室(14a)(14b)の存在により、荷
重振動に伴う液体(6)の変動が、小空気室(14a)(1
4b)を形成する弾性薄膜(11a)(11b)の動きに吸収さ
れ、オリフィス(9)を通過する液体(6)の移動がな
くなり、エンジンアイドリング時の高い周波数域、すな
わち20〜30Hzの微小振幅の高周波数域においても、動的
ばね定数の上昇が生じず、振動が車体に伝達されない。That is, due to the existence of the small air chambers (14a) and (14b), the fluctuation of the liquid (6) due to the load vibration is reduced.
4b) is absorbed by the movement of the elastic thin films (11a) (11b), the movement of the liquid (6) passing through the orifice (9) is eliminated, and the high frequency range during engine idling, that is, a small amplitude of 20 to 30 Hz Even in the high frequency range, the dynamic spring constant does not increase and the vibration is not transmitted to the vehicle body.
特に仕切板(8)両側の小空気室(14a)(14b)の空気
が貫通孔(12)を通じて自由に移動できるために、この
両小空気室(14a)(1b)の薄膜による液圧変動の吸収
作用を一層効果的になし、個々の小空気室(14a)(14
b)の容量が小さくても充分な防振効果がある。Especially, since the air in the small air chambers (14a) (14b) on both sides of the partition plate (8) can freely move through the through hole (12), the liquid pressure fluctuation due to the thin film in both small air chambers (14a) (1b) The absorption of air is made more effective, and individual small air chambers (14a) (14a
Even if the capacity of b) is small, there is sufficient vibration damping effect.
したがって、空気室(7)に対する大気圧導入と負圧導
入とを制御することにより、防振装置としての減衰性能
等の特性を変化させて、通常走行時の制振にも、またエ
ンジンアイドリング時の防振にも容易に適応させること
ができる。Therefore, by controlling the introduction of the atmospheric pressure and the introduction of the negative pressure into the air chamber (7), the characteristics such as the damping performance as the vibration isolator are changed to suppress the vibration during normal traveling and also during the engine idling. It can be easily adapted to anti-vibration.
なお、第7図〔A〕は振動周波数と動的ばね定数との関
係を示し、また同図〔B〕は振動周波数と損失はね定数
の関係を示し、それぞれの(a)線は空気室(7)に大
気圧を導入して弾性薄膜(11a)(11b)を仕切り板に密
接させた場合を、(b)線は空気室(7)を負圧導入状
態にして弾性薄膜(11a)(11b)により小空気室(14
a)(14b)を形成した場合を示している。It should be noted that FIG. 7A shows the relationship between the vibration frequency and the dynamic spring constant, and FIG. 7B shows the relationship between the vibration frequency and the loss splash constant. Each line (a) shows the air chamber. When the atmospheric pressure is introduced into (7) and the elastic thin films (11a) and (11b) are brought into close contact with the partition plate, the line (b) indicates that the air chamber (7) is in a negative pressure introduced state and the elastic thin film (11a). (11b) allows a small air chamber (14
It shows the case where a) and (14b) are formed.
[考案の効果] 上記したように本考案の液体減衰式防振装置によれば、
弾性可撓部材の外側に有する空気室を大気圧導入状態に
した場合と、負圧導入状態にした場合とを適宜選択する
により、その防振性能等の特性を容易に可変でき、通常
走行時には大きな制振効果を発揮するものであって、し
かも前記空気室の負圧導入により、仕切板の両側に弾性
薄膜による小空気室を形成し得て、エンジンアイドリン
グ時の微小振幅の振動に対しても、優れた防振効果を発
揮することができる。[Advantage of the Invention] As described above, according to the liquid damping vibration damping device of the present invention,
By appropriately selecting whether the air chamber outside the elastic flexible member is in the atmospheric pressure introduction state or in the negative pressure introduction state, the characteristics such as its vibration isolation performance can be easily changed, and during normal traveling A large damping effect is exhibited, and by introducing a negative pressure in the air chamber, small air chambers can be formed by elastic thin films on both sides of the partition plate, and vibrations of minute amplitude during engine idling can be achieved. Also, it is possible to exert an excellent anti-vibration effect.
殊に、仕切板両側に形成される小空気室を連通させてい
るので、前記空気室の容積が小さくても、防振装置とし
ての特性の可変範囲を大きくでき、小空気室形成時にお
ける制御性能が向上する。In particular, since the small air chambers formed on both sides of the partition plate are communicated with each other, even if the volume of the air chamber is small, the variable range of the characteristics of the vibration isolator can be widened, and the control at the time of forming the small air chamber can be performed. Performance is improved.
また弾性薄膜は仕切板に装着されていて、荷重の負荷や
振動に伴うゴム製基体の前後左右方向の動きには影響さ
れず、薄膜に無理な力や変形が生じず、耐久性にも優れ
る。In addition, the elastic thin film is attached to the partition plate, and is not affected by the movement of the rubber base body in the front, rear, left, and right directions due to load and vibration, and the thin film is not forced or deformed and has excellent durability. .
さらに、弾性薄膜の外側にその動きを制限するストッパ
ー部材を配した場合には、弾性薄膜の過度の膨張変形を
阻止でき、空気室の負圧導入時における小空気室の容量
が定量化し、空気室の大気導入と負圧導入による制御が
一層容易になり、かつ耐久性にも優れたものとなる。Furthermore, when a stopper member that restricts the movement of the elastic thin film is arranged outside the elastic thin film, excessive expansion and deformation of the elastic thin film can be prevented, and the capacity of the small air chamber when the negative pressure of the air chamber is introduced can be quantified. It becomes easier to control by introducing air into the chamber and introducing negative pressure, and also has excellent durability.
第1図は本考案の1実施例を示す縦断面図、第2図およ
び第3図は弾性薄膜を取付けた仕切板の断面図と平面
図、第4図〜第6図はそれぞれ他の実施例を示す縦断面
図、第7図〔A〕は振動数と動的ばね定数の関係を示す
線図、同図〔B〕と振動数と損失ばね定数の関係を示す
線図である。 (1)…ゴム製基体、(4)…受支器体、(5)…弾性
可撓部材、(6)…液体、(7)…空気室、(8)…仕
切板、(9)…液体封入室、(9a)(9b)…上下液室、
(10)…オリフィス、(11a)(11b)…弾性薄膜、(1
2)…貫通孔、(14a)(14b)…小空気室、(18)…バ
ネ手段FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are sectional views and a plan view of a partition plate to which an elastic thin film is attached, and FIGS. 4 to 6 are other embodiments. FIG. 7A is a longitudinal sectional view showing an example, and FIG. 7A is a diagram showing the relationship between the frequency and the dynamic spring constant, and FIG. 7B is a diagram showing the relationship between the frequency and the loss spring constant. (1) ... rubber base, (4) ... receiver body, (5) ... elastic flexible member, (6) ... liquid, (7) ... air chamber, (8) ... partition plate, (9) ... Liquid filling chamber, (9a) (9b) ... Upper and lower liquid chambers,
(10) ... Orifice, (11a) (11b) ... Elastic thin film, (1
2) ... through hole, (14a) (14b) ... small air chamber, (18) ... spring means
───────────────────────────────────────────────────── フロントページの続き (72)考案者 堀越 一宏 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (72)考案者 奥谷 悟 愛知県豊田市トヨタ町1番地 トヨタ自動 車株式会社内 (56)参考文献 実開 平2−114237(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuhiro Horikoshi 1 Toyota Town, Toyota City, Aichi Prefecture, Toyota Motor Co., Ltd. (72) Inventor Satoru Okutani 1, Toyota Town, Aichi Prefecture, Toyota Motor Co., Ltd. (56) Reference Bibliography 2-114237 (JP, U)
Claims (3)
て内部に室を形成するとともに該室内に液体を封入し、
前記ゴム製基体と前記弾性可撓部材間に仕切板を介装し
て前記液体封入室を上下液室に画成し、該仕切板にオリ
フィスを形成して上下液室を連通せしめてなる液体減衰
式防振装置において、 オリフィスの上下液室への開口部を除く仕切板の両面
に、該面に密接する可撓性の弾性薄膜を周縁部シール状
態に装着し、この両弾性薄膜内の仕切板に貫通孔を設け
るとともにこの貫通孔を外気と連通せしめ、さらに前記
弾性可撓部材の外面と有底の受支器体との間を空気の給
排可能な空気室となし、この空気室内を負圧状態にした
とき、前記弾性薄膜が仕切板より離間して仕切板との間
に小空気室を形成するようになしたことを特徴とする液
体減衰式防振装置。1. An anti-vibration rubber base and an elastic flexible member are combined to form a chamber inside, and a liquid is enclosed in the chamber,
A liquid in which a partition plate is interposed between the rubber base and the elastic flexible member to define the liquid sealing chamber into upper and lower liquid chambers, and an orifice is formed in the partition plate to connect the upper and lower liquid chambers. In the damping type anti-vibration device, flexible elastic thin films, which are in close contact with the surfaces, are attached to both sides of the partition plate excluding the openings of the orifices to the upper and lower liquid chambers in a peripheral edge sealed state. The partition plate is provided with a through hole, and the through hole is made to communicate with the outside air. Further, an air chamber capable of supplying and discharging air is formed between the outer surface of the elastic flexible member and the bottomed receiver. A liquid damping type vibration damping device, wherein the elastic thin film is separated from the partition plate to form a small air chamber between the partition plate and the partition plate when the chamber is in a negative pressure state.
荷されていない状態において、該弾性薄膜と仕切板の間
に空隙を有し、静荷重が負荷された状態で仕切板に密接
状態となる請求項1に記載の液体減衰式防振装置。2. The elastic thin film has a gap between the elastic thin film and the partition plate in a state where a static load is not applied to the rubber base, and the elastic thin film is in close contact with the partition plate under a static load. The liquid damping vibration damping device according to claim 1.
自在なストッパー部材が配されてなる請求項1または2
に記載の液体減衰式防振装置。3. The elastic thin film is provided with a water-permeable stopper member for restricting its movement outside the elastic thin film.
The liquid damping vibration damping device as described in 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP800590U JPH0729323Y2 (en) | 1990-01-29 | 1990-01-29 | Liquid damping type anti-vibration device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP800590U JPH0729323Y2 (en) | 1990-01-29 | 1990-01-29 | Liquid damping type anti-vibration device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0399251U JPH0399251U (en) | 1991-10-16 |
JPH0729323Y2 true JPH0729323Y2 (en) | 1995-07-05 |
Family
ID=31511657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP800590U Expired - Fee Related JPH0729323Y2 (en) | 1990-01-29 | 1990-01-29 | Liquid damping type anti-vibration device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0729323Y2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7416173B2 (en) | 2004-05-24 | 2008-08-26 | Tokai Rubber Industries, Ltd. | Pneumatically switchable type fluid-filled engine mount |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4528071B2 (en) * | 2004-09-09 | 2010-08-18 | 丸運建設株式会社 | Grating jump-up prevention device and its mounting equipment |
JP4514139B2 (en) * | 2005-02-24 | 2010-07-28 | 三重重工業株式会社 | Grating jumping prevention mechanism |
-
1990
- 1990-01-29 JP JP800590U patent/JPH0729323Y2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7416173B2 (en) | 2004-05-24 | 2008-08-26 | Tokai Rubber Industries, Ltd. | Pneumatically switchable type fluid-filled engine mount |
Also Published As
Publication number | Publication date |
---|---|
JPH0399251U (en) | 1991-10-16 |
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