JP2007278434A - Liquid sealed vibration absorbing device - Google Patents

Liquid sealed vibration absorbing device Download PDF

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JP2007278434A
JP2007278434A JP2006107505A JP2006107505A JP2007278434A JP 2007278434 A JP2007278434 A JP 2007278434A JP 2006107505 A JP2006107505 A JP 2006107505A JP 2006107505 A JP2006107505 A JP 2006107505A JP 2007278434 A JP2007278434 A JP 2007278434A
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elastic
film
liquid
liquid chamber
fixture
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Masaaki Ito
政昭 伊藤
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid sealed vibration absorbing device capable of suppressing abnormal noise resulting from the collision of an elastic partitioning membrane during reciprocating deformation. <P>SOLUTION: A partitioning means 4 is provided for partitioning a liquid sealing chamber 16 into a main liquid chamber 17 on the side of a vibration absorbing base 3 and a sub liquid chamber 18 on the side of a diaphragm 14. The means is composed of the elastic partitioning membrane 30 formed of a rubber elastic material, a first restricting part 34 for restricting displacement relative to the membrane face of the elastic partitioning membrane 30 on the side of the vibration absorbing base 3, and a second restricting part 35 having a thickness greater than that of the elastic partitioning membrane 30 for restricting the displacement relative to the membrane face of the elastic partitioning membrane 30 on the side of the diaphragm 14. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、主として自動車のエンジンなどを防振的に支持固定するのに用いられる液封入式防振装置に関するものである。   The present invention relates to a liquid-filled vibration isolator mainly used for vibration isolating support and fixing of an automobile engine or the like.

かかる液封入式防振装置の構成について、図面を参照しながら簡単に説明する。図６は、下記特許文献１に記載された液封入式防振装置の構成を示す縦断面図である。この液封入式防振装置１０１は、エンジン等の振動発生体側に取り付けられる取付具５１と、車体フレーム側に取り付けられる筒状の取付具５２と、これらを結合するゴム状弾性体により構成される防振基体５３とを備え、取付具５２に取り付けられたダイヤフラム５４と防振基体５３との間に液体封入室５６が形成されている。液体封入室５６は、仕切り手段６０によって主液室５７と副液室５８とに仕切られており、両液室５７、５８は仕切り手段６０の外周面と取付具５２の内周面との間に形成されたオリフィス５５によって互いに連通している。   The configuration of such a liquid filled type vibration isolator will be briefly described with reference to the drawings. FIG. 6 is a longitudinal sectional view showing the configuration of the liquid-filled vibration isolator described in Patent Document 1 below. The liquid-filled vibration isolator 101 includes an attachment 51 attached to a vibration generator such as an engine, a cylindrical attachment 52 attached to a vehicle body frame, and a rubber-like elastic body that couples them. A liquid enclosure chamber 56 is formed between the diaphragm 54 attached to the fixture 52 and the vibration isolating base 53. The liquid sealing chamber 56 is partitioned into a main liquid chamber 57 and a sub liquid chamber 58 by a partition means 60, and both the liquid chambers 57, 58 are located between the outer peripheral surface of the partition means 60 and the inner peripheral surface of the fixture 52. Are communicated with each other by orifices 55 formed in

液体封入室５６には、エチレングリコールなどの不凍性の液体（不図示）が封入されており、走行時の路面凹凸による振動のような周波数が低い大振幅の振動下では、オリフィス５５を介した両液室間での液体流動効果や防振基体５３の制振効果によって振動減衰機能が発揮される。また、仕切り手段６０には、ゴム状弾性体により構成される弾性仕切り膜６３が備えられており、アイドリング振動のような周波数が高い小振幅の振動下では、オリフィス５５は機能せずに、弾性仕切り膜６３が往復動変形することによって振動減衰機能が発揮される。   An antifreeze liquid (not shown) such as ethylene glycol is sealed in the liquid sealing chamber 56, and the orifice 55 is passed through the orifice 55 under a large amplitude vibration having a low frequency such as a vibration due to road surface unevenness during traveling. The vibration damping function is exhibited by the liquid flow effect between the two liquid chambers and the vibration damping effect of the vibration isolation base 53. Further, the partition means 60 is provided with an elastic partition film 63 composed of a rubber-like elastic body, and the orifice 55 does not function and is elastic under the vibration of a small amplitude with a high frequency such as idling vibration. The vibration damping function is exhibited by the reciprocating deformation of the partition film 63.

仕切り手段６０は、図７に示すように、弾性仕切り膜６３と、それを挟むオリフィス部材６１と仕切板６２とにより構成されており、取付具５２を構成する筒状金具５２ａと底金具５２ｂとのかしめ部には、仕切板６２の外周縁部がかしめ固定されている。オリフィス部材６１及び仕切板６２の、弾性仕切り膜６３の変位を規制する部分は、それぞれ貫通孔６４が形成された格子状をなしており、弾性仕切り膜６３には貫通孔６４間での液体の移動を規制するためのリブ６５が設けられている。これによって液体の不必要なリークを防止でき、振動減衰機能を高めることができる。   As shown in FIG. 7, the partition means 60 includes an elastic partition film 63, an orifice member 61 that sandwiches the elastic partition film 63, and a partition plate 62. The partition member 60 includes a cylindrical metal member 52 a and a bottom metal member 52 b that constitute the fixture 52. The outer peripheral edge portion of the partition plate 62 is caulked and fixed to the caulking portion. The portions of the orifice member 61 and the partition plate 62 that restrict the displacement of the elastic partition film 63 have a lattice shape in which through holes 64 are formed, and the elastic partition film 63 has a liquid between the through holes 64. Ribs 65 are provided for restricting movement. As a result, unnecessary leakage of the liquid can be prevented and the vibration damping function can be enhanced.

ところで、上記のような液封入式防振装置においては、弾性仕切り膜６３が往復動変形する際にオリフィス部材６１や仕切板６２に衝突し、それに起因して異音が発生するという問題があった。なお、上記のように弾性仕切り膜にリブが設けられている場合や、下記特許文献２に記載のように弾性仕切り膜の変位を規制する部分にリブが設けられている場合には、上記の衝突が軽減されるという効果が奏されるが、異音の発生を十分に抑制しうるものではなかった。
特開２００３−２９４０７８号公報 特開平６−２２１３６８号公報 By the way, the above-described liquid-filled type vibration isolator has a problem that when the elastic partition film 63 is reciprocally deformed, it collides with the orifice member 61 or the partition plate 62, resulting in abnormal noise. It was. In addition, when the rib is provided in the elastic partition film as described above, or when the rib is provided in the portion that regulates the displacement of the elastic partition film as described in Patent Document 2 below, Although the effect of reducing the collision is achieved, the generation of abnormal noise cannot be sufficiently suppressed.
JP 2003-294078 A JP-A-6-221368

本発明は上記実情に鑑みてなされたものであり、その目的は、弾性仕切り膜の往復動変形時の衝突に起因した異音を抑制することができる液封入式防振装置を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid-filled vibration isolator capable of suppressing abnormal noise caused by a collision at the time of reciprocating deformation of an elastic partition film. is there.

本発明者は、問題となる異音について鋭意研究したところ、加圧側（防振基体からダイヤフラムに向かう方向）の振動が入力された際の衝突音が、第２取付具から車体側部材に伝達されるものが顕著であることを見出した。本発明は、これに着目してなされたものであり、下記の如き構成により上記目的を達成することができるものである。   The present inventor has conducted earnest research on the abnormal noise that causes a problem. As a result, a collision sound when vibration on the pressure side (direction from the vibration-isolating base toward the diaphragm) is input is transmitted from the second fixture to the vehicle body side member. It was found that what is done is remarkable. The present invention has been made paying attention to this, and can achieve the above object with the following configuration.

即ち、本発明に係る液封入式防振装置は、第１取付具と、筒状の第２取付具と、前記第１取付具と前記第２取付具とを結合するゴム状弾性体により構成される防振基体と、前記第２取付具に取り付けられて前記防振基体との間に液体封入室を形成するダイヤフラムと、前記液体封入室を前記防振基体側の主液室と前記ダイヤフラム側の副液室とに仕切る仕切り手段と、前記仕切り手段の外周面と前記第２取付具の内周面との間に形成されて、前記主液室と前記副液室とを連通させるオリフィスとを備える液封入式防振装置において、前記仕切り手段が、ゴム状弾性体により形成された弾性仕切り膜と、前記主液室に開口する貫通孔が形成されているとともに、前記弾性仕切り膜の前記防振基体側の膜面に相対して前記弾性仕切り膜の変位を規制する第１規制部と、前記副液室に開口する貫通孔が形成されているとともに、前記弾性仕切り膜の前記ダイヤフラム側の膜面に相対して前記弾性仕切り膜の変位を規制し、前記弾性仕切り膜よりも厚みが大に設けられた第２規制部とを有するものである。   That is, the liquid-filled vibration isolator according to the present invention includes a first fixture, a cylindrical second fixture, and a rubber-like elastic body that couples the first fixture and the second fixture. An anti-vibration base, a diaphragm attached to the second fixture to form a liquid enclosure chamber between the anti-vibration base, a main liquid chamber on the anti-vibration base side and the diaphragm. Partitioning means for partitioning into a secondary liquid chamber on the side, and an orifice formed between the outer peripheral surface of the partitioning means and the inner peripheral surface of the second fixture to communicate the main liquid chamber and the secondary liquid chamber In the liquid-filled vibration isolator, the partition means is formed with an elastic partition film formed of a rubber-like elastic body and a through-hole that opens to the main liquid chamber. The displacement of the elastic partition film is regulated relative to the film surface on the vibration-proof substrate side. A first restricting portion that is formed, and a through hole that opens in the sub liquid chamber, and the displacement of the elastic partition film is restricted relative to the diaphragm-side film surface of the elastic partition film, And a second restricting portion having a thickness larger than that of the partition film.

上記構成においては、弾性仕切り膜のダイヤフラム側の膜面に相対して変位を規制する第２規制部の厚みが弾性仕切り膜よりも大に設けられているため、加圧側の振動が入力された際に弾性仕切り膜が衝突する第２規制部の剛性を高め、延いては仕切り手段の剛性を高めることができる。その結果、第２規制部を有する構成部材のマス効果が奏されることとも相俟って、衝突音の車体側部材への伝達が抑えられ、異音の発生を抑制することができる。なお、弾性仕切り膜の厚みとは、リブを含まない膜体の厚みとする。   In the above configuration, since the thickness of the second restricting portion that restricts displacement relative to the diaphragm-side film surface of the elastic partition film is larger than that of the elastic partition film, vibration on the pressure side is input. In this case, it is possible to increase the rigidity of the second restricting portion with which the elastic partition film collides, and to increase the rigidity of the partition means. As a result, coupled with the fact that the mass effect of the component member having the second restricting portion is achieved, the transmission of the collision sound to the vehicle body side member is suppressed, and the generation of abnormal noise can be suppressed. The thickness of the elastic partition film is the thickness of the film body that does not include ribs.

上記において、前記第２規制部が前記弾性仕切り膜の２倍以上の厚みを有するものが好ましい。これにより第２規制部の厚みを確保して、上述した異音抑制効果を高めることができる。なお、第２規制部の厚みは、ダイヤフラムやオリフィス出入口に干渉するなど液封入式防振装置としての機能を妨げることがない程度に制限され、副液室の容積や仕切り手段の重量などをも考慮して適宜に定めることができる。   In the above, it is preferable that the second restricting portion has a thickness that is twice or more that of the elastic partition membrane. Thereby, the thickness of a 2nd control part is ensured and the noise suppression effect mentioned above can be heightened. Note that the thickness of the second restricting portion is limited to such an extent that it does not interfere with the function of the liquid-filled vibration isolator, such as interfering with the diaphragm or the orifice inlet / outlet, and the volume of the sub liquid chamber, the weight of the partitioning means, etc. It can be determined as appropriate in consideration.

上記において、前記仕切り手段は、前記第２取付具の内周面に設けられたゴム膜に取り囲まれているとともに、前記防振基体側及び前記ダイヤフラム側の周縁部をゴム状弾性体により挟持されて前記第２取付具に取り付けられているものが好ましい。かかる構成によれば、弾性仕切り膜が往復動変形する際に発生した衝突音が、第２取付具に伝達される際に確実にゴム状弾性体を介することになるため、車体側部材への伝達を効果的に抑えて異音の発生を抑制することができる。   In the above, the partition means is surrounded by a rubber film provided on the inner peripheral surface of the second fixture, and the peripheral portions on the vibration-proof base side and the diaphragm side are sandwiched between rubber-like elastic bodies. Are preferably attached to the second fixture. According to such a configuration, the impact sound generated when the elastic partition film is reciprocally deformed is surely passed through the rubber-like elastic body when transmitted to the second fixture. The transmission can be effectively suppressed and the generation of abnormal noise can be suppressed.

上記において、前記オリフィスが、前記仕切り手段の外周側で周方向に延在して前記主液室に通ずる第１流路と、前記第１流路の前記ダイヤフラム側で周方向に延在して、前記第１流路から前記副液室に通ずる第２流路とを備え、前記仕切り手段は、前記弾性仕切り膜の膜厚方向に延設されて前記副液室の外周面を形成する周壁部と、前記周壁部から外周側に張り出して前記第１流路と前記第２流路とを仕切る張り出し部と、前記第２規制部とが一体的に成形されており、前記第２規制部の厚みが、前記張り出し部の前記第２流路の天井面から前記第２規制部の副液室側面までの高さよりも大であるものが好ましい。   In the above, the orifice extends in the circumferential direction on the outer peripheral side of the partitioning means and communicates with the main liquid chamber, and extends in the circumferential direction on the diaphragm side of the first flow path. And a second channel that leads from the first channel to the sub liquid chamber, and the partition means extends in the film thickness direction of the elastic partition film to form an outer peripheral surface of the sub liquid chamber A second projecting portion, and a projecting portion that projects from the peripheral wall portion to the outer peripheral side and divides the first flow path and the second flow path, and the second restricting section are integrally formed, Is preferably larger than the height from the ceiling surface of the second flow path of the overhanging portion to the side surface of the secondary liquid chamber of the second restricting portion.

上記構成によれば、周壁部の高さを低減して仕切り手段の構成部材の剛性を高めることができ、異音の発生を抑制することができる。また、仕切り手段全体の高さを変えることなく第２規制部を厚肉化することができ、厳しい高さ制限が課せられるエンジンマウントにおいても良好に適用することができる。   According to the said structure, the height of a surrounding wall part can be reduced, the rigidity of the structural member of a partition means can be improved, and generation | occurrence | production of abnormal noise can be suppressed. Further, the second restricting portion can be thickened without changing the overall height of the partitioning means, and can be favorably applied to an engine mount in which severe height restrictions are imposed.

以下、本発明の実施の形態について図面を参照しながら説明する。図１は、本発明に係る液封入式防振装置の構成の一例を示す縦断面図である。図２は、その液封入式防振装置が備える仕切り手段の縦断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an example of the configuration of a liquid-filled vibration isolator according to the present invention. FIG. 2 is a longitudinal sectional view of the partition means provided in the liquid-filled vibration isolator.

この液封入式防振装置１００は、自動車のエンジンを支持固定しつつ、そのエンジン振動を車体フレームに伝達させないようにするための防振装置であり、図１に示すように、エンジン側に取り付けられる取付具１（前記第１取付具に相当する。）と、エンジン下方の車体フレーム側に取り付けられる筒状の取付具２（前記第２取付具に相当する。）と、これらを結合するゴム状弾性体により構成される防振基体３とを備える。   The liquid-filled vibration isolator 100 is a vibration isolator for supporting and fixing an automobile engine so that the engine vibration is not transmitted to the vehicle body frame, and is attached to the engine side as shown in FIG. Fitting 1 (corresponding to the first fitting), a cylindrical fitting 2 (corresponding to the second fitting) attached to the vehicle body frame side below the engine, and a rubber connecting them. And an anti-vibration base 3 composed of a cylindrical elastic body.

取付具１は、例えば鉄鋼材料により構成され、上端から径方向に大きく張り出した大径部１１と、軸方向の略中央から径方向に張り出した拡径部１３とを備えている。大径部１１には、エンジン側に取り付けるための連結ボルトが螺合される雌ねじ部１２が設けられている。   The fixture 1 is made of, for example, a steel material, and includes a large-diameter portion 11 that greatly protrudes in the radial direction from the upper end, and a large-diameter portion 13 that protrudes in the radial direction from the approximate center in the axial direction. The large-diameter portion 11 is provided with a female screw portion 12 into which a connecting bolt for mounting on the engine side is screwed.

取付具２は、取付具１の拡径部１３と防振基体３とを覆う上筒金具２１と、上筒金具２１の下方に連結される下筒金具２２と、防振基体３が加硫接着されたリング状金具２３とを備えており、その各々が例えば鉄鋼材料により構成される。上筒金具２１は、その上面がストッパゴム２４によって覆われており、側面から延びたブラケット２６には、車体フレーム側に取り付けるための連結ボルト２５が挿通されている。下筒金具２２の底面に形成された開口は、後述するダイヤフラム１４により閉塞されている。上筒金具２１と下筒金具２２との開口縁同士のかしめ部には、リング状金具２３の外周縁部がかしめ固定されている。   The fixture 2 includes an upper cylindrical fitting 21 that covers the enlarged diameter portion 13 of the fixture 1 and the vibration isolation base 3, a lower cylindrical fitting 22 that is connected to the lower side of the upper cylindrical fitting 21, and the vibration isolation base 3 is vulcanized. Bonded ring-shaped metal fittings 23 are provided, each of which is made of, for example, a steel material. An upper surface of the upper cylinder fitting 21 is covered with a stopper rubber 24, and a connecting bolt 25 for attaching to the body frame side is inserted into a bracket 26 extending from the side surface. An opening formed in the bottom surface of the lower cylinder fitting 22 is closed by a diaphragm 14 described later. The outer peripheral edge portion of the ring-shaped metal fitting 23 is caulked and fixed to the caulked portion between the opening edges of the upper and lower metal fittings 21 and 22.

防振基体３は、取付具１の下側部分とリング状金具２３の内周縁部とに加硫接着されており、取付具１と取付具２とを一体的且つ弾性的に連結している。防振基体３はゴム状弾性体により構成され、かかるゴム状弾性体としては、自動車用防振ゴムの技術分野における公知のゴム材料を特に限定なく使用することができる。リング状金具２３の内周縁部はダイヤフラム１４側に湾曲しており、その内周縁部を被覆する防振基体３の部分は、後述する仕切り手段４の防振基体３側の周縁部に当接している。   The anti-vibration base 3 is vulcanized and bonded to the lower portion of the fixture 1 and the inner peripheral edge of the ring-shaped metal fitting 23, and connects the fixture 1 and the fixture 2 integrally and elastically. . The anti-vibration base 3 is composed of a rubber-like elastic body, and a rubber material known in the technical field of automobile anti-vibration rubber can be used as the rubber-like elastic body without particular limitation. The inner peripheral edge of the ring-shaped metal fitting 23 is curved toward the diaphragm 14, and the portion of the vibration isolating base 3 that covers the inner peripheral edge abuts on the peripheral edge on the vibration isolating base 3 side of the partition means 4 described later. ing.

ダイヤフラム１４は、部分球状をなすゴム膜により構成されており、下筒金具２２の内周面に設けられたゴム膜１５と一体的に加硫成形されている。また、取付具２に取り付けられたダイヤフラム１４の上面と防振基体３の下面との間には、液体封入室１６が形成されている。液体封入室１６は、仕切り手段４によって、防振基体３側の主液室１７とダイヤフラム１４側の副液室１８との２室に仕切られており、これらは仕切り手段４の外周面と取付具２の内周面との間に形成されたオリフィス１０によって互いに連通されている。   The diaphragm 14 is made of a partially spherical rubber film, and is integrally vulcanized and molded with the rubber film 15 provided on the inner peripheral surface of the lower cylinder fitting 22. In addition, a liquid sealing chamber 16 is formed between the upper surface of the diaphragm 14 attached to the fixture 2 and the lower surface of the vibration isolating base 3. The liquid sealing chamber 16 is partitioned by the partition means 4 into two chambers, a main liquid chamber 17 on the vibration isolator base 3 side and a sub liquid chamber 18 on the diaphragm 14 side, which are attached to the outer peripheral surface of the partition means 4. They are communicated with each other by an orifice 10 formed between the inner peripheral surface of the tool 2.

液体封入室１６には、エチレングリコールなどの不凍性の液体（不図示）が封入され、走行時の路面凹凸による振動のような周波数が低い大振幅の振動下では、液体がオリフィス１０を通って主液室１７と副液室１８との間を流動することにより振動減衰機能が発揮される。本実施形態のオリフィス１０は、仕切り手段４の外周側で周方向に略２周しており、主液室１７に通ずる第１流路１０ａと、第１流路１０ａのダイヤフラム１４側で延在して、第１流路１０ａから副液室１８に通ずる第２流路１０ｂとを備える。   The liquid enclosure 16 is filled with an antifreeze liquid (not shown) such as ethylene glycol, and the liquid passes through the orifice 10 under a large amplitude vibration having a low frequency such as a vibration caused by road surface unevenness during traveling. The vibration damping function is exhibited by flowing between the main liquid chamber 17 and the sub liquid chamber 18. The orifice 10 according to the present embodiment has two rounds in the circumferential direction on the outer peripheral side of the partitioning means 4 and extends on the diaphragm 14 side of the first flow path 10a and the first flow path 10a. The second flow path 10b communicates from the first flow path 10a to the auxiliary liquid chamber 18.

仕切り手段４は、図１、２に示すように、ゴム状弾性体により構成された円板状の弾性仕切り膜３０と、弾性仕切り膜３０の防振基体３側の膜面に相対して配されて弾性仕切り膜３０の変位を規制する第１規制部３４と、弾性仕切り膜３０のダイヤフラム１４側の膜面に相対して配されて弾性仕切り膜３０の変位を規制する第２規制部３５とを備えている。アイドリング振動のような周波数が高い小振幅の振動下では、オリフィス１０は機能せずに、弾性仕切り膜３０が往復動変形することによって振動減衰機能が発揮される。   As shown in FIGS. 1 and 2, the partition means 4 is disposed so as to be opposed to the disk-shaped elastic partition film 30 made of a rubber-like elastic body and the film surface of the elastic partition film 30 on the vibration isolating base 3 side. The first restricting portion 34 that restricts the displacement of the elastic partition membrane 30 and the second restricting portion 35 that is disposed to face the membrane surface of the elastic partition membrane 30 on the diaphragm 14 side and restricts the displacement of the elastic partition membrane 30. And. Under low-amplitude vibration with a high frequency such as idling vibration, the orifice 10 does not function, and the elastic partition film 30 is reciprocally deformed to exhibit a vibration damping function.

仕切り手段４は、図３〜５に示す複数の構成部材、即ち第１規制部３４を備える上蓋部材６と、第２規制部３５を備える筒状のオリフィス部材７と、弾性仕切り膜３０とを組み合わせて構成されている。これらを組み合わせた状態では、オリフィス部材７の上面の凹陥部３８に弾性仕切り膜３０が収容され、その上方に上蓋部材６が嵌合されることにより、弾性仕切り膜３０が第１規制部３４と第２規制部３５との間で挟持固定される。   The partition means 4 includes a plurality of constituent members shown in FIGS. 3 to 5, that is, the upper lid member 6 including the first restricting portion 34, the cylindrical orifice member 7 including the second restricting portion 35, and the elastic partition film 30. It is configured in combination. In a state in which these are combined, the elastic partition film 30 is accommodated in the recessed portion 38 on the upper surface of the orifice member 7, and the upper lid member 6 is fitted above the elastic partition film 30, so that the elastic partition film 30 is connected to the first restricting portion 34. It is clamped and fixed between the second restriction portions 35.

上蓋部材６は、図３に示すように外周縁部が屈曲した円板状をなし、上述したようにオリフィス部材７に上方から嵌合可能に構成されている。また、第１規制部３４は複数の貫通孔３９が形成された格子状をなし、その外周側には主液室１７に開口するオリフィス出入口８が円弧状に開設されている。   As shown in FIG. 3, the upper lid member 6 has a disk shape with a bent outer peripheral edge portion, and is configured to be fitted to the orifice member 7 from above as described above. The first restricting portion 34 has a lattice shape in which a plurality of through holes 39 are formed, and an orifice inlet / outlet 8 that opens to the main liquid chamber 17 is formed in an arc shape on the outer peripheral side thereof.

弾性仕切り膜３０は、図４に示すようにゴム状弾性体により円板状に形成されており、環状リブ３１と放射状リブ３２とが同一パターンで上下両面に形成されている。なお、図示の便宜上、各リブ３１、３２を鎖線にて示している。環状リブ３１及び放射状リブ３２が設けられていることにより、第１規制部３４又は第２規制部３５に形成された貫通孔３９間での液体の移動が規制され、液体の不必要なリークを防いで振動減衰機能が高められる。   As shown in FIG. 4, the elastic partition film 30 is formed in a disc shape by a rubber-like elastic body, and the annular ribs 31 and the radial ribs 32 are formed on the upper and lower surfaces in the same pattern. For convenience of illustration, the ribs 31 and 32 are indicated by chain lines. By providing the annular rib 31 and the radial rib 32, the movement of the liquid between the through holes 39 formed in the first restricting portion 34 or the second restricting portion 35 is restricted, and unnecessary liquid leakage is prevented. Prevents the vibration damping function.

オリフィス部材７は、図５に示すように、弾性仕切り膜３０の膜厚方向に延設されてなる周壁部３６と、周壁部３６から径方向に張り出して第１流路１０ａと第２流路１０ｂとを仕切る張り出し部３７と、凹陥部３８の底部に形成された第２規制部３５とが一体的に成形され、第２規制部３５は上蓋部材６の第１規制部３４と同様に複数の貫通孔３９が形成された格子状をなしている。オリフィス部材７の外周側には、上述したようにオリフィス１０が形成され、周壁部３６がオリフィス１０の内周壁を構成する。オリフィス部材７は例えばアルミ又はアルミ合金によりダイカスト成形され、その上方に上蓋部材６がプレス圧入により嵌合される。   As shown in FIG. 5, the orifice member 7 includes a peripheral wall portion 36 that extends in the film thickness direction of the elastic partition film 30, and projects from the peripheral wall portion 36 in the radial direction to the first flow path 10 a and the second flow path. The overhanging portion 37 that divides 10b and the second restricting portion 35 formed at the bottom of the recessed portion 38 are integrally formed, and a plurality of the second restricting portions 35 are formed in the same manner as the first restricting portion 34 of the upper lid member 6. A through-hole 39 is formed in a lattice shape. As described above, the orifice 10 is formed on the outer peripheral side of the orifice member 7, and the peripheral wall portion 36 constitutes the inner peripheral wall of the orifice 10. The orifice member 7 is die-cast, for example, from aluminum or an aluminum alloy, and the upper lid member 6 is fitted thereon by press-fitting.

第２規制部３５の厚みＬ３は、弾性仕切り膜３０の厚みＬ２よりも大に設けられている。これにより、加圧側の振動が入力された際に弾性仕切り膜３０が衝突する第２規制部３５の剛性を高め、延いては仕切り手段４の剛性を高めることができる。その結果、オリフィス部材７のマス効果が奏されることとも相俟って、衝突音の車体フレーム側への伝達が抑えられ、異音の発生を抑制することができる。また、Ｌ３を確保して上述の異音抑制効果を高める観点から、Ｌ３はＬ２の２倍以上であることが好ましく、例えば弾性仕切り膜３０の厚みＬ２が２〜３ｍｍであれば、第２規制部３５の厚みＬ３を６．０ｍｍ程度にすればよい。更に、第２規制部３５の厚みＬ３は、周壁部３６の厚みよりも大であることが好ましい。   The thickness L3 of the second restricting portion 35 is set larger than the thickness L2 of the elastic partition film 30. Thereby, the rigidity of the 2nd control part 35 which the elastic partition film | membrane 30 collides when the vibration by the side of a pressurization is input can be raised, and the rigidity of the partition means 4 can be raised by extension. As a result, in combination with the mass effect of the orifice member 7, the transmission of the collision sound to the vehicle body frame side is suppressed, and the generation of abnormal noise can be suppressed. Further, from the viewpoint of securing L3 and enhancing the above-described noise suppression effect, L3 is preferably at least twice L2, for example, if the thickness L2 of the elastic partition film 30 is 2 to 3 mm, the second regulation What is necessary is just to make thickness L3 of the part 35 into about 6.0 mm. Further, the thickness L3 of the second restricting portion 35 is preferably larger than the thickness of the peripheral wall portion 36.

負圧側（ダイヤフラムから防振基体に向かう方向）の振動が入力された際の衝突音は、異音の発生要因として顕著ではないため、本実施形態では、第１規制部３４の厚みＬ１については弾性仕切り膜３０の厚みＬ２と同程度としているが、Ｌ１をＬ２よりも大に設けても構わない。   Since the collision sound when the vibration on the negative pressure side (direction from the diaphragm toward the vibration-proof base) is input is not remarkable as a cause of abnormal noise, in the present embodiment, the thickness L1 of the first regulating portion 34 is Although it is approximately the same as the thickness L2 of the elastic partition film 30, L1 may be provided larger than L2.

仕切り手段４は、図１に示すように、その外周をゴム膜１５に取り囲まれているとともに、防振基体３側及びダイヤフラム１４側の周縁部をゴム状弾性体に挟持されて取付具２に取り付けられている。弾性仕切り膜３０の第２規制部３５との衝突音は、取付具２の下筒金具２２に伝わり、そこからブラケット２６等を介して車体フレーム側に伝達されるが、このように仕切り手段４が支持固定されていることによって、衝突音の伝達が確実にゴム状弾性体を介することになり、異音の発生を抑制することができる。なお、仕切り手段４の防振基体３側の周縁部に当接するゴム状弾性体には、リング状金具２３が埋設されているため、仕切り手段４を押圧して適切に固定することができる。   As shown in FIG. 1, the partition means 4 is surrounded by a rubber film 15, and the peripheral portions on the vibration isolating base 3 side and the diaphragm 14 side are sandwiched between rubber elastic bodies and attached to the fixture 2. It is attached. The impact sound of the elastic partition film 30 with the second restricting portion 35 is transmitted to the lower tube fitting 22 of the fixture 2 and from there to the vehicle body frame side via the bracket 26 and the like. Is supported and fixed, the transmission of the collision sound is surely performed via the rubber-like elastic body, and the generation of abnormal noise can be suppressed. In addition, since the ring-shaped metal fitting 23 is embed | buried under the rubber-like elastic body contact | abutted to the peripheral part of the vibration isolator base 3 side of the partition means 4, the partition means 4 can be pressed and fixed appropriately.

本実施形態では、第２規制部３５の厚みＬ３が、第２流路１０ｂの天井面１０ｃから第２規制部３５の副液室１８側面までの高さＨよりも大に設けられている。これにより周壁部３６の高さを低減してオリフィス部材７の剛性を高めることができ、異音の発生を抑制することができる。また、仕切り手段４全体の高さを変えることなく第２規制部３５を厚肉化することができ、厳しい高さ制限が課せられるエンジンマウントにおいても良好に適用することができる。   In the present embodiment, the thickness L3 of the second restricting portion 35 is provided larger than the height H from the ceiling surface 10c of the second flow path 10b to the side surface of the sub liquid chamber 18 of the second restricting portion 35. Thereby, the height of the surrounding wall part 36 can be reduced and the rigidity of the orifice member 7 can be improved, and generation | occurrence | production of abnormal noise can be suppressed. Further, the second restricting portion 35 can be thickened without changing the overall height of the partitioning means 4, and can be favorably applied to an engine mount in which severe height restrictions are imposed.

本発明は、上述した実施形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変更が可能であり、例えばオリフィス流路を周方向に１周としたり、上蓋部材６とオリフィス部材７とを熱可塑性樹脂により形成して、それらを超音波溶着により固着したりしても構わない。   The present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, the orifice channel is one round in the circumferential direction, or the top cover The member 6 and the orifice member 7 may be formed of a thermoplastic resin and fixed by ultrasonic welding.

本発明に係る液封入式防振装置の構成の一例を示す縦断面図1 is a longitudinal sectional view showing an example of the configuration of a liquid-filled vibration isolator according to the present invention. 図１の液封入式防振装置が備える仕切り手段の縦断面図1 is a longitudinal sectional view of partition means provided in the liquid-filled vibration isolator of FIG. 上蓋部材の（ａ）平面図と（ｂ）Ａ−Ａ断面図(A) Top view and (b) AA sectional view of the upper lid member 弾性仕切り膜の（ａ）平面図と（ｂ）Ｂ−Ｂ断面図(A) Plan view and (b) BB cross section of elastic partition membrane オリフィス部材の（ａ）平面図と（ｂ）Ｃ−Ｃ断面図(A) Plan view and (b) CC sectional view of the orifice member 従来の液封入式防振装置の構成の一例を示す縦断面図A longitudinal sectional view showing an example of the configuration of a conventional liquid-filled vibration isolator 図６の液封入式防振装置が備える仕切り手段の分解図6 is an exploded view of the partition means provided in the liquid-filled vibration isolator of FIG.

符号の説明Explanation of symbols

１ 第１取付具
２ 第２取付具
３ 防振基体
４ 仕切り手段
６ 上蓋部材
７ オリフィス部材
１０ オリフィス
１０ａ 第１流路
１０ｂ 第２流路
１０ｃ 天井面
１４ ダイヤフラム
１５ ゴム膜
１６ 液体封入室
１７ 主液室
１８ 副液室
３０ 弾性仕切り膜
３４ 第１規制部
３５ 第２規制部
３６ 周壁部
３７ 張り出し部
１００ 液封入式防振装置 DESCRIPTION OF SYMBOLS 1 1st fixture 2 2nd fixture 3 Anti-vibration base | substrate 4 Partition means 6 Upper cover member 7 Orifice member 10 Orifice 10a 1st flow path 10b 2nd flow path 10c Ceiling surface 14 Diaphragm 15 Rubber film 16 Liquid enclosure 17 Main liquid Chamber 18 Sub-liquid chamber 30 Elastic partition membrane 34 First restricting portion 35 Second restricting portion 36 Perimeter wall portion 37 Overhang portion 100 Liquid-filled vibration isolator

Claims (4)

第１取付具と、筒状の第２取付具と、前記第１取付具と前記第２取付具とを結合するゴム状弾性体により構成される防振基体と、前記第２取付具に取り付けられて前記防振基体との間に液体封入室を形成するダイヤフラムと、前記液体封入室を前記防振基体側の主液室と前記ダイヤフラム側の副液室とに仕切る仕切り手段と、前記仕切り手段の外周面と前記第２取付具の内周面との間に形成されて、前記主液室と前記副液室とを連通させるオリフィスとを備える液封入式防振装置において、
前記仕切り手段が、
ゴム状弾性体により形成された弾性仕切り膜と、
前記主液室に開口する貫通孔が形成されているとともに、前記弾性仕切り膜の前記防振基体側の膜面に相対して前記弾性仕切り膜の変位を規制する第１規制部と、
前記副液室に開口する貫通孔が形成されているとともに、前記弾性仕切り膜の前記ダイヤフラム側の膜面に相対して前記弾性仕切り膜の変位を規制し、前記弾性仕切り膜よりも厚みが大に設けられた第２規制部とを有することを特徴とする液封入式防振装置。 A first fixture, a cylindrical second fixture, a vibration-proof base composed of a rubber-like elastic body that couples the first fixture and the second fixture, and attached to the second fixture A diaphragm that forms a liquid sealing chamber between the anti-vibration base, partitioning means for partitioning the liquid sealing chamber into a main liquid chamber on the anti-vibration base side and a sub liquid chamber on the diaphragm side, and the partition In a liquid-filled vibration isolator comprising an orifice formed between an outer peripheral surface of the means and an inner peripheral surface of the second fixture, and communicating with the main liquid chamber and the sub liquid chamber,
The partition means is
An elastic partition membrane formed of a rubber-like elastic body;
A through-hole opening in the main liquid chamber is formed, and a first restricting portion for restricting displacement of the elastic partition film relative to a film surface of the elastic partition film on the side of the vibration isolation substrate;
A through-hole is formed in the sub liquid chamber, and the displacement of the elastic partition film is restricted relative to the diaphragm-side film surface of the elastic partition film, and the thickness is larger than that of the elastic partition film. A liquid-filled vibration isolator having a second restricting portion provided on the surface. 前記第２規制部が前記弾性仕切り膜の２倍以上の厚みを有する請求項１記載の液封入式防振装置。   The liquid-filled vibration isolator according to claim 1, wherein the second restricting portion has a thickness that is twice or more that of the elastic partition membrane. 前記仕切り手段は、前記第２取付具の内周面に設けられたゴム膜に取り囲まれているとともに、前記防振基体側及び前記ダイヤフラム側の周縁部をゴム状弾性体により挟持されて前記第２取付具に取り付けられている請求項１又は２記載の液封入式防振装置。   The partition means is surrounded by a rubber film provided on the inner peripheral surface of the second fixture, and the peripheral portions on the vibration-isolating base side and the diaphragm side are sandwiched by rubber-like elastic bodies, so that the first The liquid-filled vibration isolator according to claim 1 or 2, which is attached to the two fixtures. 前記オリフィスが、前記仕切り手段の外周側で周方向に延在して前記主液室に通ずる第１流路と、前記第１流路の前記ダイヤフラム側で周方向に延在して、前記第１流路から前記副液室に通ずる第２流路とを備え、
前記仕切り手段は、前記弾性仕切り膜の膜厚方向に延設されて前記副液室の外周面を形成する周壁部と、前記周壁部から外周側に張り出して前記第１流路と前記第２流路とを仕切る張り出し部と、前記第２規制部とが一体的に成形されており、
前記第２規制部の厚みが、前記張り出し部の前記第２流路の天井面から前記第２規制部の副液室側面までの高さよりも大である請求項１〜３のいずれか１項に記載の液封入式防振装置。 The orifice extends in the circumferential direction on the outer peripheral side of the partition means and communicates with the main liquid chamber, and extends in the circumferential direction on the diaphragm side of the first flow path. A second flow path from one flow path to the secondary liquid chamber,
The partition means extends in the film thickness direction of the elastic partition film to form an outer peripheral surface of the sub liquid chamber, and projects from the peripheral wall portion to the outer peripheral side to the first flow path and the second The overhanging part that partitions the flow path and the second restriction part are integrally formed,
The thickness of the said 2nd control part is larger than the height from the ceiling surface of the said 2nd flow path of the said overhang | projection part to the sub-liquid chamber side surface of the said 2nd control part. Liquid-filled vibration isolator as described in 1.
JP2006107505A 2006-04-10 2006-04-10 Liquid sealed vibration absorbing device Withdrawn JP2007278434A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009054086A1 (en) 2007-10-26 2009-04-30 Panasonic Corporation Cell selection system, cell selection method, and portable terminal
CN108662128A (en) * 2018-06-20 2018-10-16 浙江工贸职业技术学院 A kind of reducer protecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009054086A1 (en) 2007-10-26 2009-04-30 Panasonic Corporation Cell selection system, cell selection method, and portable terminal
CN108662128A (en) * 2018-06-20 2018-10-16 浙江工贸职业技术学院 A kind of reducer protecting device

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