JPH04312234A - Liquid seal vibration isolating device - Google Patents

Abstract

PURPOSE:To form a device in compact structure and to make the spring constant of the device changeable in a wide range. CONSTITUTION:A main liquid chamber A having a chamber wall formed of a thick rubber elastic body 1 and a subliquid chamber B which is divided by a partitioning plate 3 and has a chamber wall formed of a rubber film 2 are formed, and the partitioning plate is provided with an opening 31. A cylindrical valve member 5 is vertically movably provided opposite to the opening 31, and the rubber film 2 is joined to the periphery of the valve member at its center. The valve member has the same area on its upper and lower end faces 5a, 5b, and is drawn by an electromagnetic coil 6 to open an opening 51 between the upper end of the valve member and the partitioning plate. When the applying an electric current to the electromagnetic coil 6 is stopped, the valve member is made to ascend by a coil spring 53 to close the opening 51. The inner pressure caused by vibrational input of the main liquid chamber is applied to both the inner periphery and the vertical end faces of the valve member, but they are mutually canceled to turn a load acting on the valve member into nothing. Thus, a small coil spring may be enough to close the valve member, and the electromagnetic coil to be opened may also be small.

Description

【発明の詳細な説明】[Detailed description of the invention]

【０００１】0001

【産業上の利用分野】本発明は液封入防振装置に関し、
封入液の流通をＯＮ−ＯＦＦ制御することにより小振動
の吸収と大振動の抑制を併せて可能とした液封入防振装
置の構造改良に関する。[Field of Industrial Application] The present invention relates to a liquid-filled vibration isolator,
The present invention relates to a structural improvement of a liquid-filled vibration isolator that makes it possible to absorb small vibrations and suppress large vibrations by controlling the flow of the liquid on and off.

【０００２】0002

【従来の技術】かかる防振装置の一例を図３に示す。図
において、筒状の側板７内には空間を横切って厚肉の防
振ゴム体１が設けてあり、その下方は仕切板３により区
画されて主液室Ａとなっている。仕切板３は外周縁がこ
れの下方に位置する薄肉ゴム膜２とともに側板７の下端
開口縁にかしめ固定され、仕切板の下方に上記ゴム膜２
を室壁とする副液室Ｂが形成されている。ゴム膜２の下
方は容器状の底板８により覆ってある。2. Description of the Related Art An example of such a vibration isolating device is shown in FIG. In the figure, a thick vibration-proof rubber body 1 is provided across a space within a cylindrical side plate 7, and a main liquid chamber A is defined below it by a partition plate 3. The outer peripheral edge of the partition plate 3 is caulked and fixed to the lower opening edge of the side plate 7 together with the thin rubber membrane 2 located below the partition plate.
A sub-liquid chamber B is formed having a chamber wall. The lower part of the rubber membrane 2 is covered with a container-shaped bottom plate 8.

【０００３】上記仕切板３には中心に開口３１が設けら
れ、これを上記ゴム膜２の中心に設けた弁部材５´によ
って下方の副液室Ｂ側より閉鎖している。この弁部材５
´は底板８内に設けた図略の駆動機構により上下動せし
められる。[0003] The partition plate 3 is provided with an opening 31 at its center, which is closed from the sub-liquid chamber B side below by a valve member 5' provided at the center of the rubber membrane 2. This valve member 5
' is moved up and down by a drive mechanism (not shown) provided in the bottom plate 8.

【０００４】上記防振ゴム体１には中心にナット部９ａ
を形成した連結部材９が埋設され、振動体は連結部材９
の板状部９１に載置固定される。開口３１が弁部材によ
り閉鎖された状態で大振動が入力すると主液室Ａの内圧
は急激に増大し、装置の動バネ定数は大きくなる（図５
の線ｘ）。これにより、大振動は効果的に抑制される。The vibration-proof rubber body 1 has a nut portion 9a in the center.
A connecting member 9 is buried, and the vibrating body is connected to the connecting member 9.
It is placed and fixed on the plate-like part 91 of the. If a large vibration is input with the opening 31 closed by the valve member, the internal pressure of the main liquid chamber A will rapidly increase, and the dynamic spring constant of the device will increase (Fig. 5
line x). This effectively suppresses large vibrations.

【０００５】小振動が入力する場合には、上記弁部材５
´を下方へ移動せしめて開口３１を開く、これにより主
液室Ａは開口３１を経て副液室Ｂに連通する。主液室Ａ
の密封液は振動入力に応じ上記開口３１を経て自由に副
液室Ｂへ流通し、主液室Ａ内の内圧は低く維持されて装
置のバネ定数は低く保たれる（図５の線ｙ）。これによ
り小振動の良好な吸収がなされる。When small vibrations are input, the valve member 5
' is moved downward to open the opening 31, whereby the main liquid chamber A communicates with the auxiliary liquid chamber B through the opening 31. Main liquid chamber A
The sealing liquid freely flows through the opening 31 to the sub-liquid chamber B in response to the vibration input, and the internal pressure in the main liquid chamber A is maintained low, keeping the spring constant of the device low (as indicated by the line y in FIG. 5). ). This provides good absorption of small vibrations.

【０００６】[0006]

【発明が解決しようとする課題】ところで、上記従来装
置において、開口３１を閉鎖状態に維持するには、開口
面積φＡと主液室Ａの内圧Ｐの積φＡ・Ｐの力で弁部材
５´を押しつけておく必要があり、上記内圧Ｐはかなり
大きな値を示すから、弁部材駆動機構が大型化する。By the way, in the conventional device described above, in order to maintain the opening 31 in a closed state, the valve member 5' is , and the internal pressure P exhibits a considerably large value, resulting in an increase in the size of the valve member drive mechanism.

【０００７】図４に示す如く開口３１を主液室Ａ側から
閉鎖する構造も考えられ、この場合は主液室Ａ内の負圧
に抗して弁部材５´を閉鎖し、この負圧は正圧に比して
絶対値が小さいから駆動機構はやや小さくできるが、未
だ充分ではない。A structure in which the opening 31 is closed from the main liquid chamber A side as shown in FIG. Since the absolute value of is smaller than that of positive pressure, the drive mechanism can be made somewhat smaller, but it is still not sufficient.

【０００８】本発明はかかる課題を解決するもので、弁
部材駆動機構を充分小型化でき、装置全体のコンパクト
化を実現した液封入防振装置を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and it is an object of the present invention to provide a liquid-filled vibration damping device in which the valve member drive mechanism can be sufficiently miniaturized and the entire device can be made more compact.

【０００９】[0009]

【課題を解決するための手段】本発明の構成を説明する
と、振動体を支持する厚肉の防振ゴム体１内にこれを室
壁として主液室Ａを形成するとともに、仕切板３により
上記主液室Ａと区画され薄肉のゴム膜２を室壁とする副
液室Ｂを設け、筒内が上記仕切板３の開口３１を経て主
液室Ａに連通するとともに仕切板３に対して接離移動可
能にガイド壁４１内に保持された筒状弁部材５を設けて
、該弁部材５の両筒端面５ａ，５ｂを互いに同一面積に
成形し、かつ上記弁部材５を移動駆動する駆動手段６を
設けて、弁部材５の移動によりこれの筒内を上記副液室
Ｂに連通せしめる開口５１を開閉するようになしたもの
である。[Means for Solving the Problems] To explain the structure of the present invention, a main liquid chamber A is formed in a thick vibration-proof rubber body 1 that supports a vibrating body by using this as a chamber wall, and a main liquid chamber A is formed by a partition plate 3. A sub-liquid chamber B is provided which is separated from the main liquid chamber A and has a thin rubber membrane 2 as a chamber wall, and the inside of the cylinder communicates with the main liquid chamber A through the opening 31 of the partition plate 3 and is connected to the partition plate 3. A cylindrical valve member 5 is provided within the guide wall 41 so as to be movable toward and away from the valve member 5, and both cylindrical end faces 5a and 5b of the valve member 5 are formed to have the same area, and the valve member 5 is driven to move. A drive means 6 is provided to open and close an opening 51 that communicates the inside of the cylinder with the sub-liquid chamber B by moving the valve member 5.

【００１０】弁部材５により開口５１を閉鎖した状態で
は、主液室Ａと副液室Ｂの連通が断たれ、振動が入力す
ると主液室Ａ内には大きな圧力が発生する。この圧力は
開口３１を経て弁部材５の筒内に至り筒内周と両筒端面
５ａ，５ｂに印加されるが、対向する筒内周では圧力は
反対方向に作用し、また両筒端面でも圧力は反対方向へ
作用するから、互いに相殺されて弁部材５への印加荷重
は零となる。しかして、弁部材５を移動せしめる駆動力
は小さくすることができ、駆動手段６が小型化される。When the opening 51 is closed by the valve member 5, communication between the main liquid chamber A and the auxiliary liquid chamber B is cut off, and when vibration is input, a large pressure is generated in the main liquid chamber A. This pressure reaches the inside of the cylinder of the valve member 5 through the opening 31 and is applied to the cylinder inner circumference and both cylinder end faces 5a, 5b, but the pressure acts in the opposite direction on the opposing cylinder inner periphery, and also on both cylinder end faces. Since the pressures act in opposite directions, they cancel each other out and the load applied to the valve member 5 becomes zero. Therefore, the driving force for moving the valve member 5 can be reduced, and the driving means 6 can be miniaturized.

【００１１】[0011]

【実施例】図１において、筒状の側板７内には空間を横
切って厚肉の防振ゴム体１が接合してあり、その中心に
はナット部９ａを形成した連結部材９が埋設してある。 連結部材９は上端が大径の平板状に成形され、平板部９
１外周には山形断面のクッションゴム層９２が設けてあ
る。上記側板７の上端開口縁７１は上記平板部９１を覆
うように屈曲してストッパ部となっている。[Embodiment] In Fig. 1, a thick vibration-proof rubber body 1 is joined across a space in a cylindrical side plate 7, and a connecting member 9 having a nut portion 9a is embedded in the center thereof. There is. The connecting member 9 is formed into a flat plate shape with a large diameter at the upper end, and the flat plate part 9
A cushion rubber layer 92 with a chevron-shaped cross section is provided on the outer periphery. The upper end opening edge 71 of the side plate 7 is bent to cover the flat plate part 91 and serves as a stopper part.

【００１２】側板７の下端開口内には仕切板３が液密的
に嵌着されて、その上方の側板７内空間を主液室Ａとし
てある。側板７の中心には開口３１が設けてあり、その
下方には筒状の弁部材５が直立姿勢で配設してある。弁
部材５の内径は上記開口３１の径と同程度となっており
、その上端外周には薄肉ゴム膜２が中心で接合されてい
る。ゴム膜２の外周は上記仕切板３の、下方へ屈曲する
外周下面に密接してこれを室壁とする副液室Ｂを構成し
ている。A partition plate 3 is fitted in a lower end opening of the side plate 7 in a liquid-tight manner, and a space inside the side plate 7 above the partition plate 3 is defined as a main liquid chamber A. An opening 31 is provided in the center of the side plate 7, and a cylindrical valve member 5 is disposed in an upright position below the opening 31. The inner diameter of the valve member 5 is approximately the same as the diameter of the opening 31, and the thin rubber membrane 2 is joined to the outer periphery of the upper end thereof at the center. The outer periphery of the rubber membrane 2 is in close contact with the downwardly bent outer periphery lower surface of the partition plate 3, forming a sub-liquid chamber B having this as a chamber wall.

【００１３】弁部材５の下方には深い容器状の底板８が
配設され、その開口縁は上記ゴム膜２の外周とともに側
板７の下端開口縁にかしめ固定されている。底板８内に
はコイルボビン４が設けてあり、上記弁部材５は下半部
がコイルボビン４のガイド壁たる中心穴４１内に嵌装さ
れて上下に摺動自在に保持されている。A deep container-shaped bottom plate 8 is disposed below the valve member 5, and its opening edge is caulked and fixed to the lower end opening edge of the side plate 7 together with the outer periphery of the rubber membrane 2. A coil bobbin 4 is provided in the bottom plate 8, and the lower half of the valve member 5 is fitted into a center hole 41, which is a guide wall of the coil bobbin 4, and is held slidably up and down.

【００１４】コイルボビン４には電磁コイル６が巻回し
てあり、該電磁コイル６に通電した状態では図示の如く
、コイルボビン４の上面に弁部材５の外周に設けた吸着
板５２が吸引固着されている。この状態では弁部材５は
下方移動位置にあり、その上端と仕切板３下面との間に
開口５１が形成されて、該開口５１と上記開口３１を経
て主液室Ａと副液室Ｂが連通している。An electromagnetic coil 6 is wound around the coil bobbin 4, and when the electromagnetic coil 6 is energized, a suction plate 52 provided on the outer periphery of the valve member 5 is suctioned and fixed to the upper surface of the coil bobbin 4, as shown in the figure. There is. In this state, the valve member 5 is in the downward movement position, and an opening 51 is formed between its upper end and the lower surface of the partition plate 3, and the main liquid chamber A and the sub-liquid chamber B are connected through the opening 51 and the opening 31. It's communicating.

【００１５】なお、弁部材５は、コイルボビン４の内周
段付部と吸着板５２間に設けたコイルバネ５３により上
方へ付勢されている。また弁部材５の段付きに低くなっ
た上端面内周５ａと下端面５ｂの面積は同一にしてある
。The valve member 5 is urged upward by a coil spring 53 provided between the stepped inner circumferential portion of the coil bobbin 4 and the suction plate 52. Further, the areas of the stepped and lowered upper end surface inner periphery 5a and lower end surface 5b of the valve member 5 are made the same.

【００１６】図示の状態で小振動が入力すると防振ゴム
体１はこれに応じて小変形するが、密封液は開口３１，
５１を経て自由に両液室Ａ，Ｂ間に流通し、主液室Ａの
内圧は上昇することなく低く保たれる。しかして、装置
の動バネ定数は小さく、振動は良好に吸収される。When a small vibration is input in the state shown in the figure, the vibration isolating rubber body 1 is slightly deformed accordingly, but the sealing liquid remains in the opening 31,
51, it freely flows between both liquid chambers A and B, and the internal pressure of the main liquid chamber A is kept low without increasing. Therefore, the dynamic spring constant of the device is small and vibrations are well absorbed.

【００１７】大振動が入力する場合には電磁コイル６へ
の通電を停止すると、弁部材５はコイルバネ５３のバネ
力により上方へ移動せしめられて図２に示す如く、その
上端が仕切板３の下面に当接し開口５１が閉鎖される。 これにより両液室Ａ，Ｂの連通は断たれ、振動が入力す
ると主液室Ａ内には大きな正圧が発生する。これにより
装置の動バネ定数は増大し、大振動が効果的に抑制され
る。When large vibrations are input, when the energization to the electromagnetic coil 6 is stopped, the valve member 5 is moved upward by the spring force of the coil spring 53, and its upper end touches the partition plate 3 as shown in FIG. The opening 51 is closed by contacting the lower surface. As a result, communication between the two liquid chambers A and B is cut off, and when vibration is input, a large positive pressure is generated in the main liquid chamber A. This increases the dynamic spring constant of the device and effectively suppresses large vibrations.

【００１８】この時、上記正圧は弁部材５の筒内および
その上下の端面５ａ，５ｂに印加されるが、対向する筒
内周では圧力は反対方向に作用し、また同一面積とした
両筒端面５ａ，５ｂでも圧力は反対方向へ作用するから
、互いに相殺されて弁部材５へ印加される荷重は零とな
る。しかして、弁部材５を閉鎖状態に維持するためのコ
イルバネ５３のバネ力は小さくて良く、これにより弁部
材５を下方へ開放移動せしめる電磁コイル６の吸引力も
小さくできる。At this time, the positive pressure is applied to the inside of the cylinder of the valve member 5 and its upper and lower end surfaces 5a and 5b, but the pressure acts in the opposite direction on the opposing inner periphery of the cylinder. Since the pressures act in opposite directions on the cylinder end surfaces 5a and 5b, they cancel each other out and the load applied to the valve member 5 becomes zero. Therefore, the spring force of the coil spring 53 for maintaining the valve member 5 in the closed state may be small, and thereby the attractive force of the electromagnetic coil 6 that causes the valve member 5 to move downwardly to open can also be reduced.

【００１９】かくして、コイルバネ５３および電磁コイ
ル６のいずれも小型となり、全体の装置体格がコンパク
トになるとともに、弁部材５の開閉作動も速度アップで
きる。[0019] Thus, both the coil spring 53 and the electromagnetic coil 6 are made small, the overall device size becomes compact, and the opening/closing operation of the valve member 5 can be speeded up.

【００２０】[0020]

【発明の効果】以上の如く、本発明の液封入防振装置は
、コンパクトな構造で小振動の吸収と大振動の抑制を切
替え制御することができるものである。As described above, the liquid-filled vibration isolator of the present invention has a compact structure and can switch between absorbing small vibrations and suppressing large vibrations.

【図面の簡単な説明】[Brief explanation of drawings]

【図１】本発明の一実施例を示す防振装置の全体断面図
である。FIG. 1 is an overall sectional view of a vibration isolator showing an embodiment of the present invention.

【図２】本発明の一実施例を示す防振装置の全体断面図
である。FIG. 2 is an overall sectional view of a vibration isolator showing an embodiment of the present invention.

【図３】従来例を示す防振装置の全体断面図である。FIG. 3 is an overall sectional view of a conventional vibration isolator.

【図４】従来例を示す防振装置の全体断面図である。FIG. 4 is an overall sectional view of a conventional vibration isolator.

【図５】装置の動バネ特性を示す図である。FIG. 5 is a diagram showing dynamic spring characteristics of the device.

【符号の説明】[Explanation of symbols]

１　　防振ゴム体 ２　　ゴム膜 ３　　仕切板 ３１　　開口 ４　　コイルボビン ４１　　中心穴（ガイド壁） ５　　弁部材 ５ａ，５ｂ　　端面 ５１　　開口 ５３　　コイルバネ（駆動手段） ６　　電磁コイル（駆動手段） Ａ　　主液室 Ｂ　　副液室 1 Anti-vibration rubber body 2 Rubber membrane 3 Partition plate 31 Opening 4 Coil bobbin 41 Center hole (guide wall) 5 Valve member 5a, 5b end face 51 Opening 53 Coil spring (driving means) 6 Electromagnetic coil (driving means) A Main liquid chamber B Sub-liquid chamber

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】　　振動体を支持する厚肉の防振ゴム体内
にこれを室壁として主液室を形成するとともに、仕切板
により上記主液室と区画され薄肉のゴム膜を室壁とする
副液室を設け、筒内が上記仕切板の開口を経て主液室に
連通するとともに仕切板に対して接離移動可能にガイド
壁内に保持された筒状弁部材を設けて、該弁部材の両筒
端面を互いに同一面積に成形し、かつ上記弁部材を移動
駆動する駆動手段を設けて、弁部材の移動によりこれの
筒内を上記副液室に連通せしめる開口を開閉するように
なした液封入防振装置。Claim 1: A main liquid chamber is formed within a thick-walled vibration-proof rubber body that supports a vibrating body, using this as a chamber wall, and is separated from the main liquid chamber by a partition plate, with a thin-walled rubber membrane serving as the chamber wall. A auxiliary liquid chamber is provided, and a cylindrical valve member whose cylinder interior communicates with the main liquid chamber through the opening of the partition plate and is held within a guide wall so as to be movable toward and away from the partition plate is provided. Both cylindrical end surfaces of the member are formed to have the same area, and a driving means for moving and driving the valve member is provided, so that movement of the valve member opens and closes an opening that communicates the inside of the cylinder with the auxiliary liquid chamber. A liquid-filled vibration isolator.