JPS59231235A - Vibration isolating device sealed with liquid - Google Patents

Abstract

PURPOSE:To suitably suppress or isolate vibration of an engine in the all running condition of a vehicle, by enabling the moving distance of a movable separator plate, which is arranged between fluid chambers and can move in the direction of relaxing a difference of pressure between the both fluid chambers, to be controlled by an electromagnetic coil. CONSTITUTION:A vertically movable case 7 is arranged between the first fluid chamber A and the second fluid chamber B forming their chamber walls by elastic material walls 1, 2 of rubber in large thickness, and a movable separator plate 8 movable by a prescribed distance is provided inside the case 7 while the movement of said plate is controlled when an electromagnetic coil 5 acts to attract the case. When the electromagnetic coil 5 causes no attractive action, the movable separator plate 8 and the case 7 vertically move to prevent a change of internal pressure in each fluid chamber A, B. When the electromagnetic coil 5 performs the attractive action, the case 7 is attracted and the movement of the movable separator plate 8 is controlled to a small distance. Here when the change of the internal pressure in the fluid chambers A, B can not be prevented by the movement of the movable separator plate 8, vibration is damped by circulating fluid in the fluid chambers A, B through a throttling hole F provided in the movable separator plate 8.

Description

【発明の詳細な説明】 本発明は車両用エンジンマウントに使用する防振装置で
あって、絞り孔を設けた仕切板で区分された厚肉ゴム弾
性体壁よりなる第１おＪ：び第２の流体室を有し、振動
が作用して上記第１および第２の流体室が交互に拡大縮
小した時に、両流体室の圧力差により仕切板の上記絞り
孔を封入液体が流通することにより振動の減衰作用をな
すものである。DETAILED DESCRIPTION OF THE INVENTION The present invention is a vibration isolating device for use in a vehicle engine mount, which comprises first and second walls each having a thick rubber elastic wall separated by a partition plate provided with aperture holes. The fluid chamber has two fluid chambers, and when the first and second fluid chambers alternately expand and contract due to the action of vibration, the sealed liquid flows through the throttle hole of the partition plate due to the pressure difference between the two fluid chambers. This has a vibration damping effect.

この種の液封入防振装置はエンジン始動に伴なうクラン
キング振動等の低周波大振幅振動に対して絞り孔に密封
流体を流通せしめることにより振動を減衰せしめ、優れ
た制振作用をなすものである。This type of liquid-filled vibration isolator has an excellent damping effect by attenuating low-frequency, large-amplitude vibrations such as cranking vibrations that occur when starting an engine by flowing sealing fluid through the throttle hole. It is something.

ところで、車両用防振装置としてはアイドリング振動以
」−の高周波小振幅振動に対しては振動を吸収してその
伝達を防止するいわゆる防振作用をなすことが好ましい
。Incidentally, it is preferable that the vibration isolator for a vehicle has a so-called vibration isolating function that absorbs vibrations and prevents transmission of high-frequency, small-amplitude vibrations such as idling vibrations.

また、重両走行時には上記小振幅撮動に加えて−２− 路面の凹凸等による大振幅のシェイク振動が生じ、上記
防振装置は小振幅振動に対する防振作用をなすとともに
シェイタ擾動に対してはクランキング振動に対すると同
様、振動を減衰せしめる制振作用をなげことが好ましい
。In addition to the above-mentioned small-amplitude imaging during heavy vehicle driving, -2- large-amplitude shake vibrations occur due to unevenness of the road surface, etc., and the above-mentioned vibration isolator acts as a vibration damper against small-amplitude vibrations and also prevents shaker vibrations. As with cranking vibrations, it is preferable to have no damping effect to attenuate vibrations.

本発明は」−記要請に鑑み、重両の全ての走行状態にお
いて適切に制振あるいは防振作用をなす液封入防振装置
を提供する目的を右する。SUMMARY OF THE INVENTION In view of the above-mentioned requirements, the present invention has an object to provide a liquid-filled vibration isolating device that can appropriately damp or damp vibrations in all running conditions of a heavy vehicle.

以下、図示の実施例ににり本発明を説明する。The present invention will be explained below with reference to illustrated embodiments.

第１図は装置の全体断面図、第２図は装置を上方にり見
た平面図である。第１図中１．２はともに厚肉のゴム弾
性体壁で、中心部を凹状として椀状に成形され、互いに
対向ゼしめて設（）である。FIG. 1 is an overall sectional view of the device, and FIG. 2 is a plan view of the device viewed from above. In FIG. 1, 1 and 2 are both thick rubber elastic walls, which are formed into a bowl shape with a concave center, and are bulged to face each other.

そして、」−記ゴム弾性体壁１．２はそれぞれ第１の流
体室Ａおよび第２の流体室Ｂの室壁をなしている。The rubber elastic walls 1.2 constitute chamber walls of the first fluid chamber A and the second fluid chamber B, respectively.

ゴム弾性体壁２の中心部底面には底板３が接合してあり
、底板３の中心にはポル１へ３１が挿通立設しである。A bottom plate 3 is joined to the bottom surface of the center portion of the rubber elastic wall 2, and a hole 31 is inserted into the pole 1 and stands in the center of the bottom plate 3.

また、」ニ記ゴム弾性体壁２の周縁部には電磁コイル４
が埋設しである。In addition, an electromagnetic coil 4 is provided at the peripheral edge of the rubber elastic wall 2.
is buried.

−３− ゴム弾性体壁１の中心部上面には上板５が接合１ノであ
り、上板５の中心にはボルト５１が挿通立設しである。-3- An upper plate 5 is connected to the upper surface of the center portion of the rubber elastic wall 1, and a bolt 51 is inserted and erected through the center of the upper plate 5.

また、ゴム弾性体壁１の外周には筒状に成形した側板６
の上側開口部が接合しである。Further, a side plate 6 formed into a cylindrical shape is provided on the outer periphery of the rubber elastic wall 1.
The upper opening is the joint.

一方側板６の下側開口端はゴム弾性体壁２に埋設した−
に記電磁コイル４にかしめ固定しである。なお、側板６
は第２図に示１１−如く径方向の対称位置を水平に延出
せしめてあり、両延出部６１にはそれぞれ扱き穴６１ａ
が設けである。The lower open end of the side plate 6 was buried in the rubber elastic wall 2.
It is caulked and fixed to the electromagnetic coil 4. In addition, the side plate 6
As shown in FIG. 2, symmetrical positions in the radial direction are extended horizontally as shown in FIG.
is the provision.

上記ゴム弾性体壁１．２で形成された空間内には断面を
口字状としたス１〜ツバ板ｌこる環状ケース７が配設し
てあり、ケース７内には上記空間を上下に区画して第１
の流体室ΔおＪ：び第２の流体室Ｂを形成すべく可動仕
切板８が配設しである。In the space formed by the rubber elastic wall 1.2, there is disposed an annular case 7 with a mouth-shaped cross section and a collar plate. Partition and first
A movable partition plate 8 is provided to form a fluid chamber Δ and a second fluid chamber B.

上記ケース７は電磁コイル５の上端面と側板６の段付部
間で側板６に沿って」−下動可能としてあり、ケース７
の下面は磁１７１体により形成しである。The case 7 is movable downward along the side plate 6 between the upper end surface of the electromagnetic coil 5 and the stepped portion of the side plate 6.
The lower surface of is made of a magnetic 171 body.

」−記可動仕切板８はその周縁部がストッパ面たるケー
ス７の断面口字状の上下面７ａ　、７ｂに対向せしめら
れて上下の移動量を規制されている。The movable partition plate 8 has its peripheral edge opposed to the upper and lower surfaces 7a and 7b of the case 7, which are stopper surfaces, and have an opening-shaped cross section, so that the amount of vertical movement is regulated.

−４− 仕切板８の下面には断面Ｕ字状に形成した半環状部材９
が接合してあり、部材９と仕切板８の下面とで形成した
通孔９１は一端が仕切板８に設けた抜き穴８１と連通し
、他端は部材９のＵ字状の底部に設けた抜き穴９２と連
通して、上記第１の流体室Ａおよび第２の流体室８間に
密封流体を流通せしめる絞り孔Ｆを構成している。-4- On the lower surface of the partition plate 8 is a semicircular member 9 formed with a U-shaped cross section.
The through hole 91 formed by the member 9 and the lower surface of the partition plate 8 has one end communicating with the punch hole 81 provided in the partition plate 8, and the other end provided in the U-shaped bottom of the member 9. A throttle hole F communicates with the drain hole 92 and allows sealing fluid to flow between the first fluid chamber A and the second fluid chamber 8.

なお、上記底板３および上板５は装置の相対向する側面
に沿って矩形上に折り曲げた連結板１０によって一体的
に連結せしめである。そして、上板５に設（）たボルト
５１によって装置にエンジンを載置固定するとともに装
置全体は側板６の延出部６１に設けた扱き穴６１ａにボ
ルトを挿通して車体に固定支持される。このような構造
により、装置に振動が入力すると第１の流体室への縮小
変形時には第２の流体室Ｂは拡大変形し、第１の流体室
Ａの拡大変形時には第２の流体室Ｂは縮小変形するとい
う具合に両流体室Ａ、Ｂは交互に拡大縮小を繰り返す。The bottom plate 3 and the top plate 5 are integrally connected by a connecting plate 10 that is bent into a rectangular shape along opposing sides of the device. Then, the engine is mounted and fixed on the device using bolts 51 provided on the upper plate 5, and the entire device is fixed and supported on the vehicle body by inserting bolts into handling holes 61a provided in the extension portion 61 of the side plate 6. . With this structure, when vibration is input to the device, the second fluid chamber B is expanded and deformed when the first fluid chamber is contracted, and when the first fluid chamber A is expanded and deformed, the second fluid chamber B is expanded. Both fluid chambers A and B repeat expansion and contraction alternately.

上記の如きＩ４造を有する防振装置の作動を以下−５− に説明する。The operation of the vibration isolator having the I4 structure as described above is as follows -5- Explain.

エンジン始動時、電磁コイル４に通電するとケース７は
電磁コイル４に吸着固定せしめられる。When the electromagnetic coil 4 is energized when the engine is started, the case 7 is attracted and fixed to the electromagnetic coil 4.

ここで、クランキングによる大振幅振動が入力すると上
述の如く第１おにび第２の流体室Ａ、Ｂは交互に拡大縮
小してその容積が変化でる。ここにおいて、ケース７の
ストッパ面７ａ、７ｂによって上下の移動量を規制され
た仕切板８によっては各流体室Ａ、Ｂの容積変化を緩和
することはできず、両流体室Δ、８間には大きな圧力差
が生じて密封流体が高速で絞り孔Ｆを流通する。この流
通過程において密封流体は大きな流通抵抗を受け、これ
によって振動は速やかに減衰せしめられる。Here, when large-amplitude vibrations due to cranking are input, the first and second fluid chambers A and B alternately expand and contract, and their volumes change, as described above. Here, the volume change of each fluid chamber A, B cannot be alleviated by the partition plate 8, whose vertical movement is regulated by the stopper surfaces 7a, 7b of the case 7. A large pressure difference occurs and the sealing fluid flows through the throttle hole F at high speed. During this flow process, the sealing fluid is subjected to a large flow resistance, which causes vibrations to be quickly attenuated.

また、この時各流体室Ａ、Ｂの内圧の絶対値は犬ぎくな
るから、装置のバネ定数が上昇し、これによっても撮動
は効果的に押えられる。Furthermore, since the absolute value of the internal pressure in each of the fluid chambers A and B becomes too small at this time, the spring constant of the device increases, and this also effectively suppresses imaging.

アイドリング時には電磁コイル４への通電を停止する。During idling, the electromagnetic coil 4 is de-energized.

これにより、ケース７は側板６の段付部に当接するまで
自由に上下動可能となる。したがって、］辰動が入力し
て各流体室Ａ、Ｂが変形する−　　〇　　− とその容積変化を緩和寸べく可動イ１切板８おＪ：びこ
れと一体にケース７が上下に移動する。アイドリング時
の振動振幅はクランキング時に比して小さく、したがっ
て移動量の限度が大きくなった仕切板８にＪ：つて各流
体室Δ、Ｂの内圧変化は防什され、振動は速やかに吸収
される。Thereby, the case 7 can freely move up and down until it comes into contact with the stepped portion of the side plate 6. Therefore, the fluid chambers A and B are deformed by the radial motion, and the case 7 moves up and down together with the movable cutting plates 8 and 8 in order to alleviate the change in volume. . The vibration amplitude during idling is smaller than that during cranking, so the partition plate 8, which has a larger limit of movement, prevents changes in the internal pressure of each fluid chamber Δ and B, and the vibration is quickly absorbed. Ru.

エンジンの高速回転時には再び電磁コイル４へ通電する
。高速回転中のエンジンの振動振幅はアイドリング時ｊ
；りもずっと小さくなるから、移動用を小さく規制され
た可動仕切板８によっても各流体ｒｆＡ、１３の内圧変
化は充分防止されて振動は吸収される。When the engine rotates at high speed, the electromagnetic coil 4 is energized again. The vibration amplitude of an engine running at high speed is idling j
;The internal pressure of each fluid rfA, 13 is sufficiently prevented from changing, and vibrations are absorbed, even by the movable partition plate 8 whose movement is restricted to a small size.

一方、走行中に生じるシェイク等の大振幅振動に対して
は上記可動仕切板８の移動によっては各流体室Ａ、Ｂの
容積変化を緩和することはできず、両流体室Ａ、Ｂ間に
大きな圧力差が生じて絞り孔「を密封流体が流通し、振
動は急速に減衰せしめられる。On the other hand, in response to large-amplitude vibrations such as shakes that occur during running, it is not possible to alleviate changes in the volume of each fluid chamber A and B by moving the movable partition plate 8, and there is a gap between both fluid chambers A and B. A large pressure difference is created and the sealing fluid flows through the throttle hole, causing vibrations to be rapidly damped.

以上の如く、本発明の防振挿置はエンジンの低周波大振
幅振動から高周波小振幅振動に至るまで有−７− 効に振動の伝達を防止することができ、車両のすべての
走行状態において、その居住性の改善および走行性能の
向上を実現したものである。As described above, the anti-vibration installation of the present invention can effectively prevent the transmission of vibrations ranging from low-frequency, large-amplitude vibrations to high-frequency, small-amplitude vibrations of the engine, and can effectively prevent the transmission of vibrations in all driving conditions of the vehicle. , which has improved its comfort and driving performance.

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

第１図は本発明の防振装置の全体断面図、第２図は装置
の上方より見た平面図である。 １．２・・・・・・厚肉ゴム弾性体壁 ４・・・・・・電磁コイル ７・・・・・・ストッパ板 ８・・・・・・可動仕切板 Ａ・・・・・・第１の流体室 Ｂ・・・・・・第２の流体室 Ｆ・・・・・・絞り孔 −８−FIG. 1 is an overall sectional view of the vibration isolating device of the present invention, and FIG. 2 is a plan view of the device seen from above. 1.2 Thick rubber elastic wall 4 Electromagnetic coil 7 Stopper plate 8 Movable partition plate A First fluid chamber B... Second fluid chamber F... Throttle hole -8-

Claims (1)

【特許請求の範囲】 厚肉ゴム弾性体壁Ｊ：りなり、絞り孔を右する仕切板で
互いに仕切られた第１の流体室おにび第２の流体室を具
備し、エンジンの振動により上記第１および第２の流体
室が交互に拡大縮小して、これに伴なう両流体室の圧力
差により上記絞り孔を通って封入液体が流通するように
なした液封入防振装置において、上記仕切板は第１おに
び第２の流体室の容積変化に伴なう両流体室の圧力差を
緩和する方向に移動可能な可動仕切板となし、該可動仕
切板を当接せしめてその移動量を規制する磁性体よりな
るス］〜ツバ板を設けるとともに、上記ストッパ板に電
磁力を作用せしめるべく電磁コイルを設け、電磁力作用
時にはストッパ板を電磁コイルに吸着固定せしめて可動
仕切板にストッパ板が規制する範囲の移動を許し、電磁
力非作用時にはストッパ板の移動を可能として可動仕切
板の移−１− 動■をｊ【す加ゼしめるようになした液封入防振装置。[Claims] Thick rubber elastic wall J: comprises a first fluid chamber and a second fluid chamber separated from each other by a partition plate on the right side of the throttle hole, In the liquid-filled vibration isolator, the first and second fluid chambers are alternately enlarged and contracted, and the resulting pressure difference between the two fluid chambers causes the sealed liquid to flow through the throttle hole. , the partition plate is a movable partition plate that can be moved in a direction to alleviate the pressure difference between the first and second fluid chambers due to a change in volume of the first and second fluid chambers, and the movable partition plates are brought into contact with each other. A collar plate is provided, and an electromagnetic coil is provided to apply electromagnetic force to the stopper plate, and when the electromagnetic force is applied, the stopper plate is fixed to the electromagnetic coil and is movable. The liquid filling prevention device allows the partition plate to move within the range regulated by the stopper plate, and allows the stopper plate to move when no electromagnetic force is applied, thereby increasing the movement of the movable partition plate. Shaking device.