JP6196458B2 - Vibration isolator - Google Patents

Description

本発明は、例えば自動車や産業機械等に適用され、エンジン等の振動発生部の振動を吸収および減衰する防振装置に関する。   The present invention relates to a vibration isolator that is applied to, for example, automobiles and industrial machines and absorbs and attenuates vibrations of a vibration generating unit such as an engine.

従来から、この種の防振装置として、例えば下記特許文献１に示すような構成が知られている。この防振装置は、振動発生部および振動受部のうちのいずれか一方に連結される筒状の外部材、およびいずれか他方に連結されるとともに外部材内に挿通された内部材と、外部材と内部材とを連結する弾性体と、を備えている。外部材内には、液体が封入されるとともに壁面の一部が弾性体により構成された複数の受圧液室が配設されている。これらの受圧液室には、互いの間に内部材を挟み込むように一対配置され、第１制限通路を通して互いに連通された第１受圧液室が備えられている。
前記防振装置では、一対の第１受圧液室が内部材を挟み込む挟み込み方向の振動の入力時に、外部材および内部材が、弾性体を弾性変形させながら前記挟み込み方向に相対的に変位して、一対の第１受圧液室を交互に拡縮させる。これにより、第１制限通路を液体が流通し、前記振動が吸収および減衰される。 Conventionally, as this type of vibration isolator, for example, a configuration shown in Patent Document 1 below is known. The vibration isolator includes a cylindrical outer member connected to one of the vibration generating unit and the vibration receiving unit, an inner member connected to the other and inserted into the outer member, and an external And an elastic body for connecting the material and the inner member. A plurality of pressure receiving liquid chambers in which a liquid is enclosed and a part of the wall surface is made of an elastic body are disposed in the external material. These pressure receiving liquid chambers are provided with a first pressure receiving liquid chamber that is disposed in a pair so as to sandwich the inner member therebetween and communicated with each other through the first restriction passage.
In the vibration isolator, when the vibration in the sandwiching direction in which the pair of first pressure receiving liquid chambers sandwich the inner member is input, the outer member and the inner member are relatively displaced in the sandwiching direction while elastically deforming the elastic body. The pair of first pressure receiving liquid chambers are alternately expanded and contracted. Thereby, the liquid flows through the first restriction passage, and the vibration is absorbed and attenuated.

国際公開第２０１３／０１１９７６号International Publication No. 2013/011976

ところで、前記従来の防振装置では、前記挟み込み方向の振動が入力され、外部材と内部材とが相対的に変位することで第１受圧液室が縮小させられるときに、弾性体のうち、この第１受圧液室の壁面の一部を構成する壁面構成部が膨出変形する。その結果、前記従来の防振装置では、第１受圧液室の容積の減少量および第１制限通路の液体の流通量が確保し難くなっていて、この防振装置の大型化を抑えつつ、前記振動に対する減衰性能を向上させることについて改善の余地がある。なお、前記壁面構成部を厚肉にすることで膨出変形を抑制することも考えられるが、この場合、第１受圧液室が縮小させられるとき以外の場合においても壁面構成部の変形の形態が変化することから、減衰性能に影響が生じるおそれがある。   By the way, in the conventional vibration isolator, when the vibration in the sandwiching direction is input and the first pressure receiving liquid chamber is reduced by the relative displacement between the outer member and the inner member, A wall surface constituting part of the wall surface of the first pressure receiving liquid chamber bulges and deforms. As a result, in the conventional vibration isolator, it is difficult to secure the amount of decrease in the volume of the first pressure receiving liquid chamber and the amount of liquid flowing through the first restriction passage, and while suppressing the increase in size of the vibration isolator, There is room for improvement in improving the damping performance against the vibration. Although it is conceivable to suppress the bulging deformation by making the wall surface constituent part thick, in this case, the form of deformation of the wall surface constituent part is not the case when the first pressure receiving liquid chamber is reduced. Changes, the damping performance may be affected.

本発明は、前述した事情に鑑みてなされたものであって、大型化を抑えつつ減衰性能を向上させることができる防振装置を提供することを目的とする。   The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vibration isolator capable of improving damping performance while suppressing an increase in size.

前記課題を解決するために、本発明は以下の手段を提案している。
本発明に係る防振装置は、振動発生部および振動受部のうちのいずれか一方に連結される筒状の外部材、およびいずれか他方に連結されるとともに前記外部材内に挿通された内部材と、前記外部材と前記内部材とを連結する弾性体と、を備え、前記外部材内には、液体が封入されるとともに壁面の一部が前記弾性体により構成された複数の受圧液室が配設され、これらの受圧液室には、互いの間に前記内部材を挟み込むように一対配置され、第１制限通路を通して互いに連通された第１受圧液室が備えられ、前記外部材および前記内部材は、一対の前記第１受圧液室が前記内部材を挟み込む挟み込み方向の振動の入力時に、前記弾性体を弾性変形させながら前記挟み込み方向に相対的に変位して、一対の前記第１受圧液室を交互に拡縮させ、前記弾性体には、前記第１受圧液室の壁面の一部を構成し、前記外部材と前記内部材とが相対的に変位することで前記第１受圧液室が縮小させられるときに、前記挟み込み方向に交差する交差方向に膨出変形する壁面構成部が備えられ、前記外部材と前記内部材との間には、基端部が、前記内部材に対して前記挟み込み方向の外側に位置するとともに前記内部材に接続された状態で、前記内部材から前記挟み込み方向に突出し、前記外部材と前記内部材とが前記挟み込み方向に相対的に変位するときに、先端部が前記外部材に当接することで前記外部材と前記内部材との前記挟み込み方向への相対的な変位量を規制する規制部が設けられ、前記規制部は、前記基端部が前記壁面構成部と隣接するように前記壁面構成部に前記交差方向に対向し、前記交差方向に膨出変形する前記壁面構成部に当接することで前記壁面構成部の膨出変形量を規制し、前記弾性体は、前記壁面構成部とともに前記第１受圧液室を形成する第２仕切壁を備え、前記内部材は、前記第２仕切壁が連結された本体部と、前記本体部から前記交差方向に突出する装着部と、を備え、前記規制部は、前記装着部から前記挟み込み方向に突出し、前記装着部に嵌合されたベース部を更に備え、前記規制部の基端部は、前記ベース部を介して前記内部材に接続されていることを特徴とする。 In order to solve the above problems, the present invention proposes the following means.
A vibration isolator according to the present invention includes a cylindrical outer member connected to one of a vibration generating portion and a vibration receiving portion, and an inner portion connected to either one and inserted into the outer member. And a plurality of pressure receiving liquids in which a liquid is sealed and a part of a wall surface is constituted by the elastic body. Chambers are provided, and these pressure receiving liquid chambers are provided with a pair of first pressure receiving liquid chambers arranged so as to sandwich the inner member therebetween and communicated with each other through a first restriction passage. And the inner member is relatively displaced in the sandwiching direction while elastically deforming the elastic body when the pair of first pressure receiving liquid chambers inputs vibration in the sandwiching direction to sandwich the inner member. Alternately expanding and contracting the first pressure receiving liquid chambers, The elastic body constitutes a part of the wall surface of the first pressure-receiving liquid chamber, and when the first pressure-receiving liquid chamber is contracted by relatively displacing the outer member and the inner member, A wall surface bulging portion that swells and deforms in a crossing direction that intersects with the sandwiching direction is provided, and a base end portion is disposed outside the sandwiching direction with respect to the inner member between the outer member and the inner member. When the outer member and the inner member are relatively displaced in the sandwiching direction while projecting from the inner member in a state where the outer member and the inner member are relatively connected to the inner member. A regulating portion is provided that regulates a relative displacement amount of the outer member and the inner member in the sandwiching direction by abutting on the base member, and the base portion is adjacent to the wall surface constituent portion. So as to face the cross-sectional direction Regulate the bulging deformation amount of the wall component by abutting on the wall surface forming portion that bulges deformed in the intersecting direction, the elastic body, the formation of the first pressure receiving liquid chamber with the wall components The inner member includes a main body portion to which the second partition wall is coupled, and a mounting portion that protrudes from the main body portion in the intersecting direction, and the restricting portion extends from the mounting portion. A base portion protruding in the sandwiching direction and fitted to the mounting portion is further provided, and a base end portion of the restricting portion is connected to the inner member via the base portion .

この発明では、前記挟み込み方向の振動が入力されると、内部材と外部材とが、弾性体を弾性変形させつつ前記挟み込み方向に相対的に変位することで、一対の第１受圧液室が交互に拡縮して第１制限通路を液体が流通し、前記振動が吸収および減衰される。ここで、第１受圧液室が縮小させられるときに、壁面構成部が前記交差方向に膨出変形すると、この壁面構成部が規制部に当接して壁面構成部の膨出変形が規制される。またこのとき、規制部の先端部が外部材に当接すると、外部材と内部材との更なる変位が規制される。
この防振装置によれば、第１受圧液室が縮小させられるときに、膨出変形させられる壁面構成部が規制部に当接して壁面構成部の膨出変形が規制されるので、第１受圧液室の容積の減少量および第１制限通路の液体の流通量を確保することが可能になり、この防振装置の大型化を抑えつつ、前記挟み込み方向の振動に対する減衰性能を向上させることができる。
また規制部の基端部が、壁面構成部に前記交差方向に隣接しているので、例えば、膨出変形させられる壁面構成部が規制部に当接する際に、壁面構成部から規制部に加えられる衝突力を抑えること等が可能になり、壁面構成部の膨出変形を確実に規制することができる。 In this invention, when the vibration in the sandwiching direction is input, the inner member and the outer member are relatively displaced in the sandwiching direction while elastically deforming the elastic body, so that the pair of first pressure receiving liquid chambers By alternately expanding and contracting, the liquid flows through the first restriction passage, and the vibration is absorbed and damped. Here, when the first pressure receiving liquid chamber is contracted, if the wall surface constituent portion bulges and deforms in the intersecting direction, the wall surface constituent portion abuts on the restricting portion and the bulge deformation of the wall surface constituent portion is restricted. . At this time, when the tip of the restricting portion comes into contact with the outer member, further displacement between the outer member and the inner member is restricted.
According to this vibration isolator, when the first pressure-receiving liquid chamber is reduced, the wall surface component that is bulged and deformed contacts the restricting portion and the bulge deformation of the wall surface forming portion is restricted. It is possible to secure a decrease in the volume of the pressure-receiving liquid chamber and a liquid flow rate in the first restriction passage, and to improve the damping performance against vibration in the sandwiching direction while suppressing an increase in the size of the vibration isolator. Can do.
Further, since the base end portion of the restriction portion is adjacent to the wall surface configuration portion in the crossing direction, for example, when the wall surface configuration portion to be bulged and deformed contacts the restriction portion, the wall surface configuration portion adds to the restriction portion. It is possible to suppress the generated collision force and the like, and the bulging deformation of the wall surface constituent part can be reliably regulated.

また、前記規制部と前記壁面構成部との間の前記交差方向の隙間は、前記挟み込み方向の内側から外側に向かうに従い漸次大きくなっていてもよい。   Further, the gap in the intersecting direction between the restricting portion and the wall surface constituting portion may gradually increase from the inner side to the outer side in the sandwiching direction.

この場合、規制部と壁面構成部との間の前記交差方向の隙間が、前記挟み込み方向の内側から外側に向かうに従い漸次大きくなっているので、この防振装置に初期荷重が加えられ、内部材が外部材に対して、前記交差方向に沿って規制部に対する壁面構成部側に向けて変位させられたときに、壁面構成部を規制部に沿うように延在させることができる。これにより、規制部において、前記挟み込み方向の広い範囲にわたる部分で壁面構成部の膨出変形を規制することが可能になり、壁面構成部の膨出変形を一層確実に規制することができる。   In this case, since the gap in the intersecting direction between the regulating portion and the wall surface constituting portion gradually increases from the inner side to the outer side in the sandwiching direction, an initial load is applied to the vibration isolator, and the inner member However, when the outer member is displaced toward the wall surface constituting portion side with respect to the restricting portion along the intersecting direction, the wall surface constituting portion can be extended along the restricting portion. As a result, in the restricting portion, it is possible to restrict the bulging deformation of the wall surface constituting portion over a wide range in the sandwiching direction, and the bulging deformation of the wall surface constituting portion can be more reliably restricted.

本発明に係る防振装置によれば、挟み込み方向の振動に対する減衰性能を向上させることができる。   With the vibration isolator according to the present invention, it is possible to improve the damping performance against vibration in the sandwiching direction.

本発明の一実施形態に係る防振装置の斜視図である。It is a perspective view of the vibration isolator which concerns on one Embodiment of this invention. 図１に示す防振装置の分解斜視図である。It is a disassembled perspective view of the vibration isolator shown in FIG. 図１に示す防振装置の一方向および他方向の両方向に沿う横断面図である。FIG. 2 is a cross-sectional view taken along one direction and the other direction of the vibration isolator shown in FIG. 1. 図１に示す防振装置の一方向および他方向の両方向に沿う横断面図である。FIG. 2 is a cross-sectional view taken along one direction and the other direction of the vibration isolator shown in FIG. 1. 図１に示す防振装置の軸方向および一方向の両方向に沿う縦断面図である。It is a longitudinal cross-sectional view which follows the axial direction and one direction of the vibration isolator shown in FIG. 図１に示す防振装置に初期荷重が加えられた状態を示す拡大横断面図である。FIG. 2 is an enlarged cross-sectional view showing a state in which an initial load is applied to the vibration isolator shown in FIG. 1.

以下、図面を参照し、本発明の一実施形態に係る防振装置を説明する。
図１および図２に示すように、防振装置１０は、振動発生部および振動受部のうちのいずれか一方に連結される内部材１１と、内部材１１をその径方向の外側から囲繞するとともに、振動発生部および振動受部のうちのいずれか他方に連結される外部材１２と、内部材１１と外部材１２とを連結する弾性体１３と、を備えている。防振装置１０は、例えばエチレングリコール、水、シリコーンオイル等が液体として封入されたいわゆる液体封入型である。 Hereinafter, a vibration isolator according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration isolator 10 surrounds the inner member 11 connected to one of the vibration generating unit and the vibration receiving unit, and the inner member 11 from the outside in the radial direction. In addition, an outer member 12 connected to one of the vibration generating unit and the vibration receiving unit, and an elastic body 13 connecting the inner member 11 and the outer member 12 are provided. The vibration isolator 10 is a so-called liquid enclosure type in which, for example, ethylene glycol, water, silicone oil or the like is enclosed as a liquid.

ここで、この防振装置１０が振動発生部と振動受部との間に装着された装着状態では、外部材１２が水平方向に延在し、外部材１２の軸方向Ａが、実質的に水平方向と平行になる。以下では、前記軸方向Ａに直交し、装着状態で水平方向に実質的に平行になる方向を一方向（挟み込み方向）Ｂといい、前記軸方向Ａおよび前記一方向Ｂの両方向に直交し、装着状態で鉛直方向に実質的に平行になる方向を他方向（交差方向）Ｃという。また装着状態で、前記他方向Ｃに沿って鉛直上側となる方向を上側といい、鉛直下側となる方向を下側という。   Here, when the vibration isolator 10 is mounted between the vibration generating unit and the vibration receiving unit, the outer member 12 extends in the horizontal direction, and the axial direction A of the outer member 12 is substantially Parallel to the horizontal direction. Hereinafter, a direction orthogonal to the axial direction A and substantially parallel to the horizontal direction in the mounted state is referred to as one direction (a sandwiching direction) B, orthogonal to both the axial direction A and the one direction B, A direction that is substantially parallel to the vertical direction in the mounted state is referred to as another direction (cross direction) C. In the mounted state, a direction that is vertically upward along the other direction C is referred to as an upper side, and a direction that is vertically lower is referred to as a lower side.

内部材１１は、外部材１２の軸方向Ａに延在する棒状に形成され、外部材１２内に挿通され外部材１２の軸線Ｏと同軸に配置されている。内部材１１は、例えば金属材料などの硬質材料により形成されている。内部材１１には、前記軸方向Ａに貫通する取付け孔が形成されている。この取付け孔内には、前記軸方向Ａに延在する図示しない挿通部材が挿通され、内部材１１は、挿通部材を介して、振動発生部および振動受部のうちのいずれか一方に連結される。   The inner member 11 is formed in a rod shape extending in the axial direction A of the outer member 12, is inserted into the outer member 12, and is disposed coaxially with the axis O of the outer member 12. The inner member 11 is made of a hard material such as a metal material. The inner member 11 has a mounting hole penetrating in the axial direction A. An insertion member (not shown) extending in the axial direction A is inserted into the mounting hole, and the inner member 11 is connected to one of the vibration generating portion and the vibration receiving portion via the insertion member. The

図３に示すように、内部材１１は、外部材１２の前記軸方向Ａの全長にわたって延在する本体部１１ａと、本体部１１ａから上方に向けて突出する装着部１１ｂと、を備えている。本体部１１ａは、この防振装置１０を前記軸方向Ａから見た正面視において、前記一方向Ｂに延在する一対の対辺を有する台形状に形成されている。図示の例では、本体部１１ａは、前記正面視において、前記他方向Ｃに沿って延在し前記軸線Ｏ上を通過する仮想線Ｌを基準として線対称となっており、いわゆる等脚台形状に形成されている。装着部１１ｂは、前記正面視において、前記一方向Ｂおよび前記他方向Ｃの両方向に延在する矩形状に形成されている。   As shown in FIG. 3, the inner member 11 includes a main body portion 11 a that extends over the entire length of the outer member 12 in the axial direction A, and a mounting portion 11 b that protrudes upward from the main body portion 11 a. . The main body 11a is formed in a trapezoidal shape having a pair of opposite sides extending in the one direction B when the vibration isolator 10 is viewed from the axial direction A. In the illustrated example, the main body portion 11a is symmetrical with respect to an imaginary line L extending along the other direction C and passing on the axis O in the front view, and is a so-called isosceles trapezoidal shape. Is formed. The mounting portion 11b is formed in a rectangular shape extending in both the one direction B and the other direction C in the front view.

外部材１２は、前記正面視において、前記一方向Ｂに延在する一対の第１辺部１２ａと、前記他方向Ｃに延在する一対の第２辺部１２ｂを有する矩形状に形成されている。外部材１２は、図示しないブラケット部材内に嵌合され、ブラケット部材を介して振動発生部および振動受部のうちのいずれか他方に連結される。   The external member 12 is formed in a rectangular shape having a pair of first side portions 12a extending in the one direction B and a pair of second side portions 12b extending in the other direction C in the front view. Yes. The external member 12 is fitted in a bracket member (not shown), and is connected to one of the vibration generating portion and the vibration receiving portion via the bracket member.

図２に示すように、外部材１２は、例えば金属材料などの硬質材料により形成された外装部１５および内装部１６を備え、外装部１５内に内装部１６が嵌合されてなる二重筒構造とされている。外装部１５および内装部１６の前記軸方向Ａに沿った大きさは互いに同等とされ、内装部１６の前記軸方向Ａの両端縁には、外径が外装部１５の外径と同等とされた一対の環状フランジ部１７の内周縁が、各別に連結されている。環状フランジ部１７は、外装部１５と内装部１６との前記軸方向Ａに沿った相対的な移動を規制する。   As shown in FIG. 2, the outer member 12 includes an exterior part 15 and an interior part 16 formed of a hard material such as a metal material, and the double cylinder formed by fitting the interior part 16 in the exterior part 15. It is structured. The sizes of the exterior portion 15 and the interior portion 16 along the axial direction A are equal to each other, and the outer diameter is equal to the outer diameter of the exterior portion 15 at both end edges in the axial direction A of the interior portion 16. The inner peripheral edges of the pair of annular flange portions 17 are connected to each other. The annular flange portion 17 restricts relative movement of the exterior portion 15 and the interior portion 16 along the axial direction A.

内装部１６のうち、前記一方向Ｂを向く各部分には、この防振装置１０を前記一方向Ｂから見た側面視において、前記軸方向Ａおよび前記他方向Ｃの両方向に延在する矩形状をなす第１開口部１８が各別に形成されている。
また図３に示すように、内装部１６のうち、内部材１１にその下方から対向する部分には、第２開口部１９が形成されている。第２開口部１９には、外装部１５の内周面に形成され、内部にメンブラン部材２０が収容された収容凹部２１が連通している。図２に示すように、メンブラン部材２０は、例えばゴム材料などにより形成されるとともに、この防振装置１０を前記他方向Ｃから見た上面視において、前記軸方向Ａおよび前記一方向Ｂの両方向に延在する矩形状に形成されており、前記第２開口部１９内に嵌合された押さえプレート２２により収容凹部２１内からの離脱が規制されている。 Each portion of the interior portion 16 facing the one direction B has a rectangular shape extending in both the axial direction A and the other direction C in a side view when the vibration isolator 10 is viewed from the one direction B. A first opening 18 having a shape is formed separately.
As shown in FIG. 3, a second opening 19 is formed in a portion of the interior portion 16 that faces the inner member 11 from below. The second opening 19 communicates with an accommodation recess 21 formed on the inner peripheral surface of the exterior portion 15 and accommodating the membrane member 20 therein. As shown in FIG. 2, the membrane member 20 is formed of, for example, a rubber material, and both the axial direction A and the one direction B in the top view when the vibration isolator 10 is viewed from the other direction C. The holding plate 22 fitted in the second opening 19 is restricted from being detached from the housing recess 21.

また図３に示すように、外装部１５の外周面には、底面に形成された複数の連通孔２３を通して収容凹部２１に連通する液室用凹部２４が形成されている。液室用凹部２４は、収容凹部２１に前記他方向Ｃに並設され、図示の例では、収容凹部２１の下方に位置している。また液室用凹部２４は、下側に位置し外装部１５の外周面に開口する大径部２５、上側に位置し内径が収容凹部２１の内径よりも大きい小径部２６により段状に形成されている。   As shown in FIG. 3, a liquid chamber recess 24 that communicates with the housing recess 21 through a plurality of communication holes 23 formed on the bottom surface is formed on the outer peripheral surface of the exterior portion 15. The liquid chamber recess 24 is juxtaposed with the storage recess 21 in the other direction C, and is located below the storage recess 21 in the illustrated example. The liquid chamber recess 24 is formed in a step shape by a large-diameter portion 25 positioned on the lower side and opening on the outer peripheral surface of the exterior portion 15, and a small-diameter portion 26 positioned on the upper side and having an inner diameter larger than the inner diameter of the housing recess 21. ing.

そして、この液室用凹部２４がダイヤフラム部材２７で閉塞されることにより、液体が封入された拡縮可能な副液室２８が形成されている。図２に示すように、ダイヤフラム部材２７は、前記上面視において、前記軸方向Ａおよび前記一方向Ｂの両方向に延在する矩形状に形成されており、図３に示すように、液室用凹部２４の大径部２５内に嵌合している。また、ダイヤフラム部材２７において外周縁部よりも内側に位置する中央部は、上方に向けて膨出し液室用凹部２４の小径部２６内に配置されている。
なお図示の例では、外装部１５は、前記軸方向Ａおよび前記一方向Ｂの両方向に沿って延在する図示しない分割面に沿って一対の分割体２９に分割可能に形成されている。 The liquid chamber recess 24 is closed by the diaphragm member 27, thereby forming an expandable / contractable sub liquid chamber 28 in which the liquid is sealed. As shown in FIG. 2, the diaphragm member 27 is formed in a rectangular shape extending in both the axial direction A and the one direction B in the top view. As shown in FIG. The large diameter portion 25 of the recess 24 is fitted. Further, the central portion of the diaphragm member 27 located on the inner side of the outer peripheral edge portion is disposed in the small diameter portion 26 of the bulging liquid chamber concave portion 24 upward.
In the illustrated example, the exterior portion 15 is formed so as to be split into a pair of split bodies 29 along split surfaces (not shown) extending along both the axial direction A and the one direction B.

弾性体１３は、例えばゴム材料などにより形成され、外部材１２の内周面および内部材１１の外周面それぞれに加硫接着されている。なお、外部材１２の内周面のうち、弾性体１３が加硫接着されていない部分は、弾性体１３と同一材料で一体に形成された被覆膜３０により被覆されている。   The elastic body 13 is formed of, for example, a rubber material, and is vulcanized and bonded to the inner peripheral surface of the outer member 12 and the outer peripheral surface of the inner member 11. A portion of the inner peripheral surface of the outer member 12 where the elastic body 13 is not vulcanized and bonded is covered with a coating film 30 that is integrally formed of the same material as the elastic body 13.

弾性体１３は、同一材料で一体に形成された一対の第１仕切壁（壁面構成部）３１、第１連結膜３４ａ、一対の第２仕切壁３２、第２連結膜３４ｂ、一対の第１閉塞壁３９および一対の第２閉塞壁４３を備えている。
一対の第１仕切壁３１は、内部材１１を前記一方向Ｂに挟んで配置されており、各第１仕切壁３１は、前記装着部１１ｂから前記一方向Ｂの外側に向けて突設されている。第１仕切壁３１の先端部は、外部材１２の内周面において前記第１開口部１８よりも上側に位置する部分に連結されている。第１仕切壁３１は、前記他方向Ｃを向く板状に形成されていて、第１仕切壁３１の前記他方向Ｃの厚さは、内部材１１に接続される基端部から先端部に至るまでの前記一方向Ｂの全長にわたって同等になっている。両第１仕切壁３１同士は、前記第１連結膜３４ａを介して一体に連結されている。第１連結膜３４ａは、前記装着部１１ｂ上に形成されている。 The elastic body 13 includes a pair of first partition walls (wall surface constituent portions) 31, a first connection film 34 a, a pair of second partition walls 32, a second connection film 34 b, and a pair of first films integrally formed of the same material. A blocking wall 39 and a pair of second blocking walls 43 are provided.
The pair of first partition walls 31 are arranged with the inner member 11 sandwiched in the one direction B, and each first partition wall 31 projects from the mounting portion 11b toward the outside in the one direction B. ing. The distal end portion of the first partition wall 31 is connected to a portion located above the first opening 18 on the inner peripheral surface of the outer member 12. The first partition wall 31 is formed in a plate shape facing the other direction C, and the thickness of the first partition wall 31 in the other direction C is from the proximal end portion connected to the inner member 11 to the distal end portion. It is equivalent over the entire length of the one direction B. The first partition walls 31 are integrally connected to each other via the first connection film 34a. The first connection film 34a is formed on the mounting portion 11b.

一対の第２仕切壁３２は、前記一方向Ｂに間隔をあけて設けられており、各第２仕切壁３２は、前記正面視において、外部材１２の角部から、前記一方向Ｂおよび前記他方向Ｃの両方向に傾斜する方向に延設されて内部材１１に連結されている。第２仕切壁３２は、外部材１２の４つの角部のうち、下側に位置する２つの角部に各別に連結されている。第２仕切壁３２は、下方から上方に向かうに従い漸次、前記一方向Ｂの内側に向けて延在し、前記正面視において内部材１１の前記一対の対辺を接続する傾斜辺に連結されている。両第２仕切壁３２同士は、前記第２連結膜３４ｂを介して一体に連結されている。第２連結膜３４ｂは、前記本体部１１ａ上に形成されている。   The pair of second partition walls 32 are provided at an interval in the one direction B, and each second partition wall 32 extends from the corner portion of the outer member 12 in the front view. It extends in a direction inclined in both directions of the other direction C and is connected to the inner member 11. The second partition wall 32 is separately connected to two corners located on the lower side among the four corners of the outer member 12. The second partition wall 32 gradually extends inward in the one direction B as it goes from below to above, and is connected to an inclined side that connects the pair of opposite sides of the inner member 11 in the front view. . Both the second partition walls 32 are integrally connected via the second connection film 34b. The second coupling film 34b is formed on the main body portion 11a.

ここで外部材１２内には、液体が封入されるとともに壁面の一部が弾性体１３により構成された複数の受圧液室３５、３６が配設されている。図３および図４に示すように、これらの受圧液室３５、３６は、第１制限通路３７を通して互いに連通された一対の第１受圧液室３５と、前記副液室２８に第２制限通路３８を通して連通された第２受圧液室３６と、を備えている。また本実施形態では、これらの第１受圧液室３５と第２受圧液室３６とは、弾性体１３の第２仕切壁３２により、前記内部材１１の周方向に仕切られている。   Here, in the outer member 12, a plurality of pressure receiving liquid chambers 35 and 36 in which a liquid is sealed and a part of the wall surface is constituted by the elastic body 13 are disposed. As shown in FIGS. 3 and 4, these pressure receiving liquid chambers 35, 36 include a pair of first pressure receiving liquid chambers 35 communicated with each other through a first restriction passage 37 and a second restriction passage to the sub liquid chamber 28. And a second pressure receiving fluid chamber 36 communicated through 38. In the present embodiment, the first pressure receiving liquid chamber 35 and the second pressure receiving liquid chamber 36 are partitioned by the second partition wall 32 of the elastic body 13 in the circumferential direction of the inner member 11.

図３および図５に示すように、一対の第１受圧液室３５は、前記軸方向Ａに延設されるとともに、内部材１１を前記一方向Ｂに挟み込むように配置されている。第１受圧液室３５は、第１仕切壁３１の先端部と、第２仕切壁３２と、の間に設けられた空間における前記軸方向Ａの両端部が、前記一対の第１閉塞壁３９で各別に閉塞されることにより形成され、前記第１開口部１８に連通している。   As shown in FIGS. 3 and 5, the pair of first pressure receiving liquid chambers 35 are arranged so as to extend in the axial direction A and sandwich the inner member 11 in the one direction B. The first pressure receiving liquid chamber 35 is configured such that both end portions in the axial direction A in the space provided between the distal end portion of the first partition wall 31 and the second partition wall 32 are the pair of first blocking walls 39. And is communicated with the first opening 18.

図３に示すように、第１制限通路３７は、各第１受圧液室３５と副液室２８とを各別に連通するように一対設けられ、図示の例では、一対の第１受圧液室３５は、第１制限通路３７および副液室２８を通して互いに連通されている。
第１制限通路３７の流路長および流路断面積は、その第１制限通路３７の共振周波数が予め決められた周波数となるように設定（チューニング）されている。この予め決められた周波数としては、例えばアイドル振動（例えば、周波数が１８Ｈｚ〜３０Ｈｚ、振幅が±０．５ｍｍ以下）の周波数や、アイドル振動よりも周波数が低いシェイク振動（例えば、周波数が１４Ｈｚ以下、振幅が±０．５ｍｍより大きい）の周波数などが挙げられる。 As shown in FIG. 3, a pair of first restriction passages 37 are provided so as to communicate each of the first pressure receiving liquid chambers 35 and the sub liquid chambers 28, and in the illustrated example, a pair of first pressure receiving liquid chambers are provided. 35 are communicated with each other through the first restriction passage 37 and the auxiliary liquid chamber 28.
The channel length and the channel cross-sectional area of the first restricting passage 37 are set (tuned) so that the resonance frequency of the first restricting passage 37 becomes a predetermined frequency. Examples of the predetermined frequency include a frequency of idle vibration (for example, a frequency of 18 Hz to 30 Hz and an amplitude of ± 0.5 mm or less), and a shake vibration having a frequency lower than that of the idle vibration (for example, a frequency of 14 Hz or less, A frequency of which the amplitude is larger than ± 0.5 mm).

第１制限通路３７は、外部材１２の外周面に形成された第１周溝４０と、第１周溝４０における一方の周端部と第１受圧液室３５とを連通する第１受圧連通部４１と、第１周溝４０における他方の周端部と副液室２８とを連通する第１副連通部４２と、を備えている。そして第１制限通路３７は、これらのうちの第１周溝４０の開口部が、前記ブラケット部材により外側から閉塞されることにより構成されている。
第１周溝４０における前記一方の周端部、および前記他方の周端部はそれぞれ、第１受圧液室３５および副液室２８それぞれに対する前記一方向Ｂの外側に位置しており、第１受圧連通部４１および第１副連通部４２はそれぞれ、前記一方向Ｂに沿って延設されている。 The first restriction passage 37 is connected to the first circumferential groove 40 formed on the outer circumferential surface of the outer member 12, and one circumferential end portion of the first circumferential groove 40 and the first pressure receiving liquid chamber 35. And a first sub-communication portion 42 that communicates the other peripheral end portion of the first circumferential groove 40 with the sub-liquid chamber 28. And the 1st restriction | limiting channel | path 37 is comprised because the opening part of the 1st circumferential groove 40 of these is obstruct | occluded from the outer side by the said bracket member.
The one circumferential end portion and the other circumferential end portion of the first circumferential groove 40 are located outside the one direction B with respect to the first pressure receiving liquid chamber 35 and the sub liquid chamber 28, respectively. Each of the pressure receiving communication portion 41 and the first sub communication portion 42 extends along the one direction B.

図４および図５に示すように、第２受圧液室３６は、前記軸方向Ａに延設されるとともに、前記他方向Ｃに内部材１１に並設されている。第２受圧液室３６は、一対の第２仕切壁３２と、内部材１１と、前記押さえプレート２２と、の間に設けられた空間における前記軸方向Ａの両端部が、前記一対の第２閉塞壁４３で各別に閉塞されることにより形成されている。図４に示すように、第２受圧液室３６は、内部材１１の下方に配設されており、第２受圧液室３６と副液室２８とは、前記収容凹部２１を間に挟んで前記他方向Ｃに並設されている。   As shown in FIGS. 4 and 5, the second pressure receiving liquid chamber 36 extends in the axial direction A and is juxtaposed to the inner member 11 in the other direction C. The second pressure receiving liquid chamber 36 is configured such that both end portions in the axial direction A in the space provided between the pair of second partition walls 32, the inner member 11, and the pressing plate 22 are the pair of second partitions. It is formed by being individually blocked by the blocking wall 43. As shown in FIG. 4, the second pressure receiving liquid chamber 36 is disposed below the inner member 11, and the second pressure receiving liquid chamber 36 and the sub liquid chamber 28 sandwich the accommodating recess 21 therebetween. They are juxtaposed in the other direction C.

第２制限通路３８の流路長および流路断面積は、その第２制限通路３８の共振周波数が予め決められた周波数となるように設定（チューニング）されている。
第２制限通路３８は、外部材１２の外周面に形成された第２周溝４４と、第２周溝４４における一方の周端部と第２受圧液室３６とを連通する第２受圧連通部４５と、第２周溝４４における他方の周端部と副液室２８とを連通する第２副連通部４６と、を備えている。そして第２制限通路３８は、これらのうちの第２周溝４４の開口部が、前記ブラケット部材により外側から閉塞されることにより構成されている。 The flow path length and the flow path cross-sectional area of the second restriction passage 38 are set (tuned) so that the resonance frequency of the second restriction passage 38 becomes a predetermined frequency.
The second restriction passage 38 is connected to the second circumferential groove 44 formed on the outer peripheral surface of the outer member 12, and the second pressure receiving communication communicating the one peripheral end of the second circumferential groove 44 and the second pressure receiving liquid chamber 36. And a second sub-communication portion 46 that communicates the other peripheral end portion of the second circumferential groove 44 with the sub-liquid chamber 28. And the 2nd restriction | limiting channel | path 38 is comprised when the opening part of the 2nd circumferential groove 44 of these is obstruct | occluded from the outer side by the said bracket member.

第２周溝４４は、外部材１２の外周面に、前記液室用凹部２４を回避するように前記周方向に沿って延設され、第２周溝４４の両周端部は、液室用凹部２４を前記一方向Ｂに間に挟むように位置している。第２受圧連通部４５は、第２周溝４４における前記一方の周端部から前記一方向Ｂに沿って内側に向けて延設された後、上方に向けて屈曲されて前記押さえプレート２２に向けて開口し、押さえプレート２２に前記他方向Ｃに貫設された貫通孔４７を通して第２受圧液室３６内に連通している。また第２副連通部４６は、前記一方向Ｂに沿って延設されている。なお図示の例では、前記貫通孔４７は、押さえプレート２２に複数設けられ、これらの貫通孔４７のうちの一部は、第２受圧液室３６と収容凹部２１とを連通しており、これら一部の貫通孔４７を通して、メンブラン部材２０に第２受圧液室３６の液圧変動が及ぼされる。   The second circumferential groove 44 extends on the outer circumferential surface of the outer member 12 along the circumferential direction so as to avoid the liquid chamber recess 24, and both circumferential end portions of the second circumferential groove 44 are formed in the liquid chamber. The concave portion 24 is located so as to be sandwiched in the one direction B. The second pressure receiving communication portion 45 extends from the one peripheral end portion of the second circumferential groove 44 toward the inside along the one direction B, and then is bent upward to be formed on the pressing plate 22. The second pressure receiving liquid chamber 36 communicates with the holding plate 22 through a through hole 47 penetrating in the other direction C. The second sub-communication portion 46 extends along the one direction B. In the illustrated example, a plurality of the through holes 47 are provided in the holding plate 22, and some of the through holes 47 communicate with the second pressure receiving liquid chamber 36 and the accommodating recess 21. The fluid pressure fluctuation of the second pressure receiving fluid chamber 36 is exerted on the membrane member 20 through some of the through holes 47.

なお図５に示すように、内部材１１は、一対の第１受圧液室３５および第２受圧液室３６それぞれの前記軸方向Ａの全長にわたって延設されている。図示の例では、内部材１１における前記軸方向Ａの両端縁は、外部材１２から前記軸方向Ａの外側に向けて突出するとともに、前記第１閉塞壁３９および前記第２閉塞壁４３は、内部材１１における前記軸方向Ａの両端縁、および外部材１２における前記軸方向Ａの両端縁よりも、前記軸方向Ａの内側に位置している。   As shown in FIG. 5, the inner member 11 extends over the entire length in the axial direction A of each of the pair of first pressure receiving liquid chamber 35 and second pressure receiving liquid chamber 36. In the illustrated example, both end edges of the inner member 11 in the axial direction A protrude from the outer member 12 toward the outer side of the axial direction A, and the first closing wall 39 and the second closing wall 43 are The inner member 11 is located on the inner side of the axial direction A with respect to both end edges in the axial direction A and the outer member 12 with respect to both end edges in the axial direction A.

また本実施形態では、図３に示すように、内部材１１には、内部材１１と外部材１２との前記一方向Ｂおよび前記他方向Ｃへの一定量以上の相対的な変位を規制するストッパ部材３３が設けられている。ストッパ部材３３は、内部材１１に着脱可能に装着されている。ストッパ部材３３は、前記装着部１１ｂに嵌合されたベース部３３ａと、ベース部３３ａに突設された突出部３３ｂ、３３ｃと、を備えている。   In the present embodiment, as shown in FIG. 3, the inner member 11 is restricted to have a certain amount of relative displacement between the inner member 11 and the outer member 12 in the one direction B and the other direction C. A stopper member 33 is provided. The stopper member 33 is detachably attached to the inner member 11. The stopper member 33 includes a base portion 33a fitted to the mounting portion 11b, and projecting portions 33b and 33c protruding from the base portion 33a.

ベース部３３ａは、下方に向けて開口する逆Ｕ字状に形成され、装着部１１ｂを上方および前記一方向Ｂの両側から覆っている。ベース部３３ａは、例えば金属材料などの硬質材料により形成されている。
突出部３３ｂ、３３ｃは、例えばゴム材料などにより形成されている。突出部３３ｂ、３３ｃには、外部材１２と内部材１１との前記一方向Ｂへの相対的な変位量を規制する第１突出部（規制部）３３ｂと、外部材１２と内部材１１との前記他方向Ｃへの相対的な変位量を規制する第２突出部３３ｃと、が備えられている。これらの突出部３３ｂ、３３ｃは、同一材料で一体に形成されている。 The base portion 33a is formed in an inverted U shape that opens downward and covers the mounting portion 11b from above and from both sides in the one direction B. The base portion 33a is formed of a hard material such as a metal material.
The protrusions 33b and 33c are made of, for example, a rubber material. The protrusions 33b and 33c include a first protrusion (restriction part) 33b that restricts the relative displacement amount of the outer member 12 and the inner member 11 in the one direction B, the outer member 12 and the inner member 11, and And a second projecting portion 33c that regulates the relative displacement amount in the other direction C. These protrusions 33b and 33c are integrally formed of the same material.

第２突出部３３ｃは、ベース部３３ａの上面に配設されている。第２突出部３３ｃは、外部材１２と内部材１１とが相対的に変位したときに、外部材１２に当接することで、外部材１２と内部材１１との更なる変位を規制する。   The second projecting portion 33c is disposed on the upper surface of the base portion 33a. When the outer member 12 and the inner member 11 are relatively displaced, the second projecting portion 33 c abuts on the outer member 12, thereby restricting further displacement between the outer member 12 and the inner member 11.

第１突出部３３ｂは、ベース部３３ａを前記一方向Ｂに間に挟んで一対設けられ、ベース部３３ａ（内部材１１）から前記一方向Ｂに突出している。第１突出部３３ｂは、外部材１２と内部材１１とが前記一方向Ｂに相対的に変位するときに、この第１突出部３３ｂの先端部が外部材１２に当接することで、外部材１２と内部材１１との前記一方向Ｂへの相対的な変位量を規制する。第１突出部３３ｂの前記他方向Ｃの大きさは、この第１突出部３３ｂのうち、ベース部３３ａを介して内部材１１に接続される基端部から、先端部に向かうに従い漸次小さくなっている。第１突出部３３ｂの先端部は、前記一方向Ｂの外側に向けて凸となる凸曲面状に形成されている。   A pair of first projecting portions 33b are provided with the base portion 33a interposed in the one direction B, and project in the one direction B from the base portion 33a (inner member 11). When the outer member 12 and the inner member 11 are relatively displaced in the one direction B, the first projecting portion 33b is brought into contact with the outer member 12 by the tip of the first projecting portion 33b. The amount of relative displacement between the inner member 11 and the inner member 11 in the one direction B is regulated. The magnitude | size of the said other direction C of the 1st protrusion part 33b becomes small gradually as it goes to a front-end | tip part from the base end part connected to the inner member 11 via the base part 33a among this 1st protrusion parts 33b. ing. The front end of the first protrusion 33b is formed in a convex curved surface that is convex toward the outside in the one direction B.

そして本実施形態では、第１突出部３３ｂは、この第１突出部３３ｂの基端部が第１仕切壁３１と隣接するように第１仕切壁３１に前記他方向Ｃに対向している。第１突出部３３ｂは、第１仕切壁３１を間に挟んで第１受圧液室３５の反対側に位置していて、第１仕切壁３１に上側から対向している。第１突出部３３ｂと第１仕切壁３１との間には、第１突出部３３ｂの基端部から先端部に至るまでの前記一方向Ｂの全長にわたって、前記他方向Ｃの隙間Ｇが設けられていて、第１突出部３３ｂの下面は、前記隙間Ｇを介して第１仕切壁３１に対向している。前記隙間Ｇは、前記一方向Ｂの内側から外側に向かうに従い漸次大きくなっている。   In the present embodiment, the first projecting portion 33 b faces the first partition wall 31 in the other direction C so that the base end portion of the first projecting portion 33 b is adjacent to the first partition wall 31. The first projecting portion 33b is located on the opposite side of the first pressure receiving liquid chamber 35 with the first partition wall 31 therebetween, and faces the first partition wall 31 from above. A gap G in the other direction C is provided between the first protruding portion 33b and the first partition wall 31 over the entire length in the one direction B from the base end portion to the distal end portion of the first protruding portion 33b. In addition, the lower surface of the first protrusion 33 b faces the first partition wall 31 with the gap G interposed therebetween. The gap G gradually increases from the inner side to the outer side in the one direction B.

この防振装置１０が振動発生部と振動受部との間に介装されたときには、この防振装置１０に、内部材１１を外部材１２に対して下側に向けて変位させるような初期荷重が加えられる。すると図６に示すように、第１仕切壁３１のうち、前記一方向Ｂの内側（内部材１１側）が外側（外部材１２側）に比べて下側に向けて大きく変位するように、第１仕切壁３１が変形させられる。これにより、第１仕切壁３１が、第１突出部３３ｂに沿うように延在させられて第１突出部３３ｂの下面と実質的に平行に延在し、第１仕切壁３１と第１突出部３３ｂとの間の前記隙間Ｇの前記他方向Ｃに沿う大きさが、前記一方向Ｂの全長にわたって同等となる。   When the vibration isolator 10 is interposed between the vibration generating portion and the vibration receiving portion, the initial is such that the vibration isolator 10 displaces the inner member 11 downward relative to the outer member 12. A load is applied. Then, as shown in FIG. 6, in the first partition wall 31, the inner side (inner member 11 side) in the one direction B is largely displaced toward the lower side compared to the outer side (outer member 12 side). The first partition wall 31 is deformed. Accordingly, the first partition wall 31 extends along the first protrusion 33b and extends substantially parallel to the lower surface of the first protrusion 33b, and the first partition wall 31 and the first protrusion The size along the other direction C of the gap G between the portion 33b is the same over the entire length in the one direction B.

この防振装置１０が例えば自動車に取り付けられる場合、外部材１２は、前記ブラケット部材を介して、振動発生部としてのエンジンに連結される一方、内部材１１は、前記挿通部材を介して、振動受部としての車体に連結される。なお自動車では、エンジンから車体に、鉛直方向に沿う主振動、および車体の前後方向または左右方向に沿う副振動が入力され易い。そこでこの防振装置１０は、例えば前記一方向Ｂが、前記前後方向または前記左右方向に一致するように取り付けられ、前記他方向Ｃに主振動が入力されるとともに、前記一方向Ｂに副振動が入力される。   When the vibration isolator 10 is attached to an automobile, for example, the outer member 12 is connected to an engine as a vibration generating unit via the bracket member, while the inner member 11 is vibrated via the insertion member. It is connected to the vehicle body as a receiving part. In an automobile, main vibration along the vertical direction and side vibration along the front-rear direction or the left-right direction of the vehicle body are easily input from the engine to the vehicle body. Therefore, the vibration isolator 10 is attached, for example, so that the one direction B coincides with the front-rear direction or the left-right direction, and a main vibration is input in the other direction C and a sub-vibration is generated in the one direction B. Is entered.

はじめに、振動発生部から主振動が入力されたときには、内部材１１と外部材１２とが、弾性体１３を弾性変形させつつ前記他方向Ｃに相対的に変位する。
するとこのとき、例えば内部材１１と外部材１２との相対的な変位や、第２仕切壁３２の弾性変形などにより、第２受圧液室３６が拡縮されて、図４に示すような第２受圧液室３６と副液室２８との間で第２制限通路３８内を通して液体が流通して第２制限通路３８内で液柱共振が生じることで、第２制限通路３８の共振周波数の周波数と同等の周波数の振動が吸収および減衰される。ここで内部材１１が、第２受圧液室３６の前記軸方向Ａの全長にわたって延設されているので、第２受圧液室３６は、前記軸方向Ａの全長にわたって大きく変形して拡縮することとなる。
さらにこのとき、例えば第１仕切壁３１および第２仕切壁３２の弾性変形などにより各第１受圧液室３５が拡縮されて、図３に示すような第１受圧液室３５と副液室２８との間で第１制限通路３７内を通して各別に液体が流通して第１制限通路３７内で液柱共振が生じることで、第１制限通路３７の共振周波数の周波数と同等の周波数の振動が吸収および減衰される。ここで内部材１１が、第１受圧液室３５の前記軸方向Ａの全長にわたって延設されているので、第１受圧液室３５は、前記軸方向Ａの全長にわたって大きく変形して拡縮することとなる。
なお、このように内部材１１と外部材１２とが前記他方向Ｃに相対的に変位したときに、第２突出部３３ｃが、外部材１２の内周面に当接すると、内部材１１と外部材１２との更なる相対的な変位が規制される。 First, when the main vibration is input from the vibration generating unit, the inner member 11 and the outer member 12 are relatively displaced in the other direction C while elastically deforming the elastic body 13.
Then, at this time, for example, the second pressure receiving liquid chamber 36 is expanded and contracted due to relative displacement between the inner member 11 and the outer member 12, elastic deformation of the second partition wall 32, and the like, as shown in FIG. The liquid flows between the pressure receiving liquid chamber 36 and the sub liquid chamber 28 through the second restriction passage 38 and liquid column resonance occurs in the second restriction passage 38, so that the frequency of the resonance frequency of the second restriction passage 38 is obtained. Is absorbed and damped. Here, since the inner member 11 extends over the entire length of the second pressure receiving fluid chamber 36 in the axial direction A, the second pressure receiving fluid chamber 36 is greatly deformed and expanded and contracted over the entire length of the axial direction A. It becomes.
Further, at this time, the first pressure receiving liquid chambers 35 are expanded and contracted by elastic deformation of the first partition wall 31 and the second partition wall 32, for example, and the first pressure receiving liquid chamber 35 and the sub liquid chamber 28 as shown in FIG. The liquid flows through the first restricting passage 37 and the liquid column resonance occurs in the first restricting passage 37, so that the vibration having the same frequency as the resonance frequency of the first restricting passage 37 is generated. Absorbed and attenuated. Here, since the inner member 11 extends over the entire length of the first pressure receiving fluid chamber 35 in the axial direction A, the first pressure receiving fluid chamber 35 is greatly deformed and expanded and contracted over the entire length in the axial direction A. It becomes.
In addition, when the inner member 11 and the outer member 12 are relatively displaced in the other direction C as described above, when the second projecting portion 33c comes into contact with the inner peripheral surface of the outer member 12, the inner member 11 and Further relative displacement with the external material 12 is restricted.

また、振動発生部から副振動が入力されたときには、内部材１１と外部材１２とが、弾性体１３を弾性変形させつつ前記一方向Ｂに相対的に変位することで、一対の第１受圧液室３５が各別に拡縮し、第１受圧液室３５と副液室２８との間で第１制限通路３７内を液体が流通して第１制限通路３７内で液柱共振が生じることとなり、第１制限通路３７の共振周波数の周波数と同等の周波数の振動が吸収および減衰される。ここで内部材１１が、第１受圧液室３５の前記軸方向Ａの全長にわたって延設されているので、第１受圧液室３５は、前記軸方向Ａの全長にわたって大きく変形して拡縮することとなる。
なお、第１受圧液室３５が縮小させられるときに、第１仕切壁３１が前記他方向Ｃに膨出変形すると、この第１仕切壁３１が第１突出部３３ｂに当接して第１仕切壁３１の更なる膨出変形が規制され、第１突出部３３ｂにより第１仕切壁３１の膨出変形量が規制される。またこのとき、第１突出部３３ｂが、外部材１２の内周面に当接すると、内部材１１と外部材１２との更なる相対的な変位が規制される。 Further, when the sub-vibration is input from the vibration generating unit, the inner member 11 and the outer member 12 are relatively displaced in the one direction B while elastically deforming the elastic body 13, whereby the pair of first pressure receiving members Each of the liquid chambers 35 expands and contracts, and the liquid flows through the first restriction passage 37 between the first pressure receiving liquid chamber 35 and the sub liquid chamber 28, and liquid column resonance occurs in the first restriction passage 37. The vibration having the same frequency as the resonance frequency of the first restriction passage 37 is absorbed and damped. Here, since the inner member 11 extends over the entire length of the first pressure receiving fluid chamber 35 in the axial direction A, the first pressure receiving fluid chamber 35 is greatly deformed and expanded and contracted over the entire length in the axial direction A. It becomes.
When the first pressure receiving liquid chamber 35 is contracted and the first partition wall 31 bulges and deforms in the other direction C, the first partition wall 31 comes into contact with the first projecting portion 33b and becomes the first partition. Further bulging deformation of the wall 31 is restricted, and the amount of bulging deformation of the first partition wall 31 is restricted by the first protrusion 33b. At this time, when the first projecting portion 33 b comes into contact with the inner peripheral surface of the outer member 12, further relative displacement between the inner member 11 and the outer member 12 is restricted.

以上説明したように、本実施形態に係る防振装置１０によれば、第１受圧液室３５が縮小させられるときに、膨出変形させられた第１仕切壁３１が第１突出部３３ｂに当接して第１仕切壁３１の膨出変形が規制されるので、第１受圧液室３５の容積の減少量および第１制限通路３７の液体の流通量を確保することが可能になり、この防振装置１０の大型化を抑えつつ、前記一方向Ｂの振動に対する減衰性能を向上させることができる。
また第１突出部３３ｂの基端部が、第１仕切壁３１に前記他方向Ｃに隣接しているので、例えば、膨出変形させられた第１仕切壁３１が第１突出部３３ｂに当接する際に、第１仕切壁３１から第１突出部３３ｂに加えられる衝突力を抑えること等が可能になり、第１仕切壁３１の膨出変形を確実に規制することができる。 As described above, according to the vibration isolator 10 according to the present embodiment, when the first pressure receiving liquid chamber 35 is reduced, the first partition wall 31 that is bulged and deformed becomes the first protruding portion 33b. Since the bulging deformation of the first partition wall 31 is restricted by abutting, it becomes possible to secure the amount of decrease in the volume of the first pressure receiving liquid chamber 35 and the amount of liquid flow in the first restriction passage 37. While suppressing the increase in size of the vibration isolator 10, it is possible to improve the damping performance against the vibration in the one direction B.
In addition, since the base end portion of the first projecting portion 33b is adjacent to the first partition wall 31 in the other direction C, for example, the bulging and deformed first partition wall 31 contacts the first projecting portion 33b. It is possible to suppress the collision force applied from the first partition wall 31 to the first projecting portion 33b when contacting, and the bulge deformation of the first partition wall 31 can be reliably restricted.

また、第１突出部３３ｂと第１仕切壁３１との間の前記他方向Ｃの隙間Ｇが、前記一方向Ｂの内側から外側に向かうに従い漸次大きくなっているので、この防振装置１０に、内部材１１を外部材１２に対して下側に向けて変位させるような初期荷重が加えられたときに、第１仕切壁３１を第１突出部３３ｂに沿うように延在させることができる。これにより、第１突出部３３ｂにおいて、前記一方向Ｂの広い範囲にわたる部分で第１仕切壁３１の膨出変形を規制することが可能になり、第１仕切壁３１の膨出変形を一層確実に規制することができる。   Further, since the gap G in the other direction C between the first projecting portion 33b and the first partition wall 31 gradually increases from the inner side to the outer side in the one direction B, the vibration isolator 10 When an initial load is applied that causes the inner member 11 to be displaced downward relative to the outer member 12, the first partition wall 31 can be extended along the first protruding portion 33b. . This makes it possible to restrict the bulging deformation of the first partition wall 31 in the first projecting portion 33b over a wide range in the one direction B, thereby further ensuring the bulging deformation of the first partition wall 31. Can be regulated.

また内部材１１が、一対の第１受圧液室３５および第２受圧液室３６それぞれの前記軸方向Ａの全長にわたって延設されているので、この防振装置１０に前記一方向Ｂ、前記他方向Ｃの振動が入力されたときに、内部材１１と外部材１２とが前記一方向Ｂ、前記他方向Ｃに相対的に変位することにより、これらの受圧液室３５、３６を前記軸方向Ａの全長にわたって大きく変形させて拡縮させることができる。これにより、弾性体１３の弾性変形量を抑えつつ、これらの受圧液室３５、３６を大きく拡縮させ易くすることが可能になり、弾性体１３にかかる負荷を抑えて弾性体１３の性能を長期にわたって維持し易くすることができる。   Further, since the inner member 11 extends over the entire length in the axial direction A of each of the pair of first pressure receiving liquid chamber 35 and second pressure receiving liquid chamber 36, the vibration isolator 10 has the one direction B, the other When the vibration in the direction C is input, the inner member 11 and the outer member 12 are relatively displaced in the one direction B and the other direction C, so that the pressure receiving liquid chambers 35 and 36 are moved in the axial direction. It can be greatly deformed and expanded and contracted over the entire length of A. This makes it possible to greatly expand and contract these pressure receiving liquid chambers 35 and 36 while suppressing the amount of elastic deformation of the elastic body 13, and suppresses the load applied to the elastic body 13, thereby improving the performance of the elastic body 13 for a long time. Can be easily maintained.

また、外部材１２が、前記正面視において、前記第１辺部１２ａおよび前記第２辺部１２ｂを有する矩形状に形成されているので、前記一方向Ｂおよび前記他方向Ｃを判別し易くすることが可能になり、この防振装置１０の取り扱い性を向上させることができる。   Further, since the outer member 12 is formed in a rectangular shape having the first side portion 12a and the second side portion 12b in the front view, the one direction B and the other direction C are easily discriminated. This makes it possible to improve the handleability of the vibration isolator 10.

また、第２仕切壁３２が、前記正面視において、外部材１２の角部から、前記傾斜する方向に延設されて内部材１１に連結されているので、第２仕切壁３２が、前記一方向Ｂや前記他方向Ｃに沿って延設されている場合に比べて、第２仕切壁３２を長く形成することができる。これにより、第２仕切壁３２が弾性変形するときに第２仕切壁３２にかかる負荷を第２仕切壁３２の全体に分散させ、第２仕切壁３２に局所的に負荷が集中するのを抑制することが可能になり、第２仕切壁３２の性能を長期にわたって維持し易くすることができる。   Further, since the second partition wall 32 extends from the corner portion of the outer member 12 in the inclined direction and is connected to the inner member 11 in the front view, the second partition wall 32 is connected to the inner member 11. Compared to the case of extending along the direction B or the other direction C, the second partition wall 32 can be formed longer. Thereby, when the 2nd partition wall 32 elastically deforms, the load concerning the 2nd partition wall 32 is disperse | distributed to the whole 2nd partition wall 32, and it suppresses that a load concentrates on the 2nd partition wall 32 locally. Thus, the performance of the second partition wall 32 can be easily maintained over a long period of time.

また、ストッパ部材３３が、内部材１１と外部材１２とが前記一方向Ｂに相対的に変位したとき、および内部材１１と外部材１２とが前記他方向Ｃに相対的に変位したときに、外部材１２の内周面に当接して更なる変位を規制するので、弾性体１３が大きく変形しすぎるのを抑制することが可能になり、弾性体１３の性能を長期にわたって確実に維持し易くすることができる。
またストッパ部材３３が、外部材１２内に配設されているので、ストッパ部材３３を設けることによりこの防振装置１０が大型になるのを抑えることができる。 Further, when the inner member 11 and the outer member 12 are relatively displaced in the one direction B and when the inner member 11 and the outer member 12 are relatively displaced in the other direction C, the stopper member 33 is Since the further displacement is restricted by contacting the inner peripheral surface of the outer member 12, it is possible to suppress the elastic body 13 from being deformed excessively, and the performance of the elastic body 13 can be reliably maintained over a long period of time. Can be made easier.
Further, since the stopper member 33 is disposed in the outer member 12, the vibration isolator 10 can be prevented from becoming large by providing the stopper member 33.

なお、本発明の技術的範囲は前記実施形態に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において種々の変更を加えることが可能である。
例えば、環状フランジ部１７、メンブラン部材２０、収容凹部２１、押さえプレート２２、連通孔２３、被覆膜３０、第１連結膜３４ａ、第２連結膜３４ｂはなくてもよい。
また前記実施形態では、外部材１２が、外装部１５内に内装部１６が嵌合されてなるものとしたが、これに限られるものではなく、例えば外部材１２が１つの筒状部材により構成されていてもよい。 The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, the annular flange 17, the membrane member 20, the housing recess 21, the pressing plate 22, the communication hole 23, the coating film 30, the first connection film 34 a, and the second connection film 34 b may be omitted.
In the above embodiment, the outer member 12 is formed by fitting the inner portion 16 in the outer portion 15. However, the present invention is not limited to this. For example, the outer member 12 is constituted by one cylindrical member. May be.

また前記実施形態では、ストッパ部材３３が、内部材１１に着脱可能に装着されているものとしたが、これに限られず、着脱不能に装着されていてもよい。
さらに前記実施形態では、ストッパ部材３３が、ベース部３３ａを備えているものとしたが、これに限られるものではなく、ベース部が備えられておらず、例えば第１突出部が内部材に直結されていてもよい。 Moreover, in the said embodiment, although the stopper member 33 shall be mounted | worn with the inner member 11 so that attachment or detachment is possible, it is not restricted to this, You may mount | wear with non-detachment.
Furthermore, in the said embodiment, although the stopper member 33 shall be provided with the base part 33a, it is not restricted to this, The base part is not provided, for example, a 1st protrusion part is directly connected to an inner member. May be.

また前記実施形態では、第２仕切壁３２が、前記正面視において、外部材１２の角部から、前記一方向Ｂおよび前記他方向Ｃの両方向に傾斜する方向に延設されて内部材１１に連結されているものとしたが、これに限られるものではなく、例えば、第２仕切壁３２が、前記一方向Ｂや前記他方向Ｃに沿って延設されていてもよい。   In the embodiment, the second partition wall 32 extends from the corner of the outer member 12 in a direction inclined in both the one direction B and the other direction C in the front view. However, the present invention is not limited to this. For example, the second partition wall 32 may extend along the one direction B or the other direction C.

また前記実施形態では、外部材１２は、前記正面視において矩形状に形成されているものとしたが、これに限られるものではなく、例えば楕円形状や真円形状に形成されていてもよい。
さらに前記実施形態では、内部材１１は、本体部１１ａおよび装着部１１ｂを備えているものとしたが、これに限られるものではなく、例えば本体部のみにより構成されていてもよい。
さらにまた、前記実施形態では、前記本体部１１ａは、前記正面視において台形状に形成されているものとしたが、これに限られるものではなく、例えば楕円形状や真円形状に形成されていてもよい。 Moreover, in the said embodiment, although the outer member 12 shall be formed in the rectangular shape in the said front view, it is not restricted to this, For example, you may be formed in elliptical shape or perfect circle shape.
Furthermore, in the said embodiment, although the inner member 11 shall be provided with the main-body part 11a and the mounting part 11b, it is not restricted to this, For example, you may be comprised only by the main-body part.
Furthermore, in the said embodiment, although the said main-body part 11a shall be formed in the trapezoid shape in the said front view, it is not restricted to this, For example, it is formed in elliptical shape or perfect circle shape. Also good.

また前記実施形態では、内部材１１は、一対の第１受圧液室３５および第２受圧液室３６それぞれの前記軸方向Ａの全長にわたって延設されているものとしたが、これに限られるものではなく、それぞれの全長にわたって延設されていなくてもよい。
さらに前記実施形態では、外部材１２は、内部材１１と同軸に配設されるものとしたが、これに限られるものではなく、例えば外部材１２の軸線と内部材１１の軸線とが、互いにずらされていてもよい。 Moreover, in the said embodiment, although the inner member 11 shall be extended over the full length of the said axial direction A of each of a pair of 1st pressure receiving liquid chambers 35 and 2nd pressure receiving liquid chambers 36, it is restricted to this. Instead, it does not have to extend over the entire length.
Further, in the above-described embodiment, the outer member 12 is disposed coaxially with the inner member 11, but the present invention is not limited to this. For example, the axis of the outer member 12 and the axis of the inner member 11 are mutually connected. It may be shifted.

また前記実施形態では、一対の第１受圧液室３５は、第１制限通路３７および副液室２８を通して互いに連通されているものとしたが、これに限られるものではなく、例えば副液室２８を通さずに第１制限通路３７のみを通して互いに連結されていてもよい。   In the above embodiment, the pair of first pressure receiving liquid chambers 35 are communicated with each other through the first restricting passage 37 and the sub liquid chamber 28. However, the present invention is not limited to this. They may be connected to each other only through the first restriction passage 37 without passing through.

また前記実施形態では、防振装置１０として圧縮式を示したが、第２受圧液室３６が鉛直方向下側に位置しかつ副液室２８が鉛直方向上側に位置するように取り付けられる吊り下げ式であってもよい。   In the above embodiment, the compression type is shown as the vibration isolator 10, but the suspension is attached so that the second pressure receiving liquid chamber 36 is located on the lower side in the vertical direction and the sub liquid chamber 28 is located on the upper side in the vertical direction. It may be a formula.

また、本発明に係る防振装置１０は、車両のエンジンマウントに限定されるものではなく、エンジンマウント以外に適用することも可能である。例えば、建設機械に搭載された発電機のマウントにも適用することも可能であり、或いは、工場等に設置される機械のマウントにも適用することも可能である。   The vibration isolator 10 according to the present invention is not limited to an engine mount of a vehicle, and can be applied to other than the engine mount. For example, the present invention can be applied to a mount of a generator mounted on a construction machine, or can be applied to a mount of a machine installed in a factory or the like.

その他、本発明の趣旨に逸脱しない範囲で、前記実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、前記した変形例を適宜組み合わせてもよい。   In addition, it is possible to appropriately replace the constituent elements in the embodiment with known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

１０ 防振装置、１１ 内部材、１２ 外部材、１３ 弾性体、３１ 第１仕切壁（壁面構成部）、３３ｂ 第１突出部（規制部）、３５ 第１受圧液室、３７ 第１制限通路、Ａ 軸方向、Ｂ 一方向（挟み込み方向）、Ｃ 他方向（交差方向）、Ｇ 隙間、Ｌ 仮想線 DESCRIPTION OF SYMBOLS 10 Vibration isolator, 11 Inner member, 12 External material, 13 Elastic body, 31 1st partition wall (wall surface structure part), 33b 1st protrusion part (regulation part), 35 1st pressure receiving liquid chamber, 37 1st restriction | limiting channel | path , A axis direction, B one direction (pinching direction), C other direction (crossing direction), G gap, L virtual line

Claims (2)

振動発生部および振動受部のうちのいずれか一方に連結される筒状の外部材、およびいずれか他方に連結されるとともに前記外部材内に挿通された内部材と、
前記外部材と前記内部材とを連結する弾性体と、を備え、
前記外部材内には、液体が封入されるとともに壁面の一部が前記弾性体により構成された複数の受圧液室が配設され、
これらの受圧液室には、互いの間に前記内部材を挟み込むように一対配置され、第１制限通路を通して互いに連通された第１受圧液室が備えられ、
前記外部材および前記内部材は、一対の前記第１受圧液室が前記内部材を挟み込む挟み込み方向の振動の入力時に、前記弾性体を弾性変形させながら前記挟み込み方向に相対的に変位して、一対の前記第１受圧液室を交互に拡縮させ、
前記弾性体には、前記第１受圧液室の壁面の一部を構成し、前記外部材と前記内部材とが相対的に変位することで前記第１受圧液室が縮小させられるときに、前記挟み込み方向に交差する交差方向に膨出変形する壁面構成部が備えられ、
前記外部材と前記内部材との間には、基端部が、前記内部材に対して前記挟み込み方向の外側に位置するとともに前記内部材に接続された状態で、前記内部材から前記挟み込み方向に突出し、前記外部材と前記内部材とが前記挟み込み方向に相対的に変位するときに、先端部が前記外部材に当接することで前記外部材と前記内部材との前記挟み込み方向への相対的な変位量を規制する規制部が設けられ、
前記規制部は、前記基端部が前記壁面構成部と隣接するように前記壁面構成部に前記交差方向に対向し、前記交差方向に膨出変形する前記壁面構成部に当接することで前記壁面構成部の膨出変形量を規制し、
前記弾性体は、前記壁面構成部とともに前記第１受圧液室を形成する第２仕切壁を備え、
前記内部材は、前記第２仕切壁が連結された本体部と、前記本体部から前記交差方向に突出する装着部と、を備え、
前記規制部は、前記装着部から前記挟み込み方向に突出し、
前記装着部に嵌合されたベース部を更に備え、
前記規制部の基端部は、前記ベース部を介して前記内部材に接続されていることを特徴とする防振装置。 A cylindrical outer member connected to any one of the vibration generating portion and the vibration receiving portion, and an inner member connected to either one and inserted into the outer member;
An elastic body for connecting the outer member and the inner member;
In the outer member, a plurality of pressure receiving liquid chambers in which a liquid is enclosed and a part of a wall surface is configured by the elastic body are disposed,
These pressure receiving liquid chambers are provided with a first pressure receiving liquid chamber that is disposed in a pair so as to sandwich the inner member therebetween, and communicated with each other through a first restriction passage,
The outer member and the inner member are relatively displaced in the sandwiching direction while elastically deforming the elastic body when a vibration in the sandwiching direction in which the pair of first pressure receiving fluid chambers sandwich the inner member is input. Alternately expanding and contracting the pair of first pressure receiving chambers,
The elastic body constitutes a part of the wall surface of the first pressure-receiving liquid chamber, and when the first pressure-receiving liquid chamber is contracted by relatively displacing the outer member and the inner member, A wall surface component that bulges and deforms in an intersecting direction intersecting the sandwiching direction,
Between the outer member and the inner member, a proximal end portion is located on the outer side of the sandwiching direction with respect to the inner member, and is connected to the inner member in the sandwiching direction from the inner member. When the outer member and the inner member are relatively displaced in the sandwiching direction, the distal end portion abuts on the outer member, so that the outer member and the inner member are relative to each other in the sandwiching direction. There is a restriction part that regulates the amount of displacement
The regulating portion is opposed to the wall surface configuration portion in the intersecting direction so that the base end portion is adjacent to the wall surface configuration portion, and contacts the wall surface configuration portion that bulges and deforms in the intersecting direction. Regulate the amount of bulging deformation of components ,
The elastic body includes a second partition wall that forms the first pressure receiving liquid chamber together with the wall surface constituent part,
The inner member includes a main body portion to which the second partition wall is connected, and a mounting portion that protrudes from the main body portion in the intersecting direction,
The restricting portion protrudes from the mounting portion in the sandwiching direction,
Further comprising a base portion fitted to the mounting portion,
The anti-vibration device according to claim 1, wherein a base end portion of the restricting portion is connected to the inner member via the base portion . 請求項１記載の防振装置であって、
前記規制部と前記壁面構成部との間の前記交差方向の隙間は、前記挟み込み方向の内側から外側に向かうに従い漸次大きくなっていることを特徴とする防振装置。 The vibration isolator according to claim 1,
The vibration isolator according to claim 1, wherein the gap in the intersecting direction between the restricting portion and the wall surface constituting portion gradually increases from the inner side to the outer side in the sandwiching direction.

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