JP5572524B2

JP5572524B2 - Vibration isolator

Info

Publication number: JP5572524B2
Application number: JP2010246861A
Authority: JP
Inventors: 雅哉田邉; 龍也堤
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2010-11-02
Filing date: 2010-11-02
Publication date: 2014-08-13
Anticipated expiration: 2030-11-02
Also published as: JP2012097850A

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.

この種の防振装置としては、従来、例えば下記特許文献１に示すように、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第一取付部材と、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第二取付部材と、第一取付部材及び第二取付部材を弾性的に連結すると共に第一取付部材の一端部を閉塞する弾性体と、第一取付部材の他端部を閉塞するダイヤフラムと、第一取付部材の内側に嵌め込まれた仕切り部材と、を備えた構成が知られている。上記した第一取付部材の内側には、液体が封入された液室が形成されており、この液室は、上記した仕切り部材によって、上記弾性体を壁面の一部とする主液室と、上記ダイヤフラムを壁面の一部とする副液室と、に区画されている。また、上記した仕切り部材には、主液室と副液室とを連通する制限通路が形成されている。この制限通路は、周方向（第一取付部材の中心軸線回りの方向）に沿って延在する流路であり、制限通路の流路長や断面積は、特定の周波数帯の振動が入力されたときに液柱共振が生じるようにチューニングされている。 Conventionally, as this type of vibration isolator, for example, as shown in Patent Document 1 below, a cylindrical first mounting member connected to one of a vibration generating portion and a vibration receiving portion, and a vibration generating portion And a second mounting member connected to either one of the vibration receiving portions, an elastic body that elastically connects the first mounting member and the second mounting member and closes one end of the first mounting member, A configuration is known that includes a diaphragm that closes the other end of the first mounting member, and a partition member that is fitted inside the first mounting member. A liquid chamber filled with a liquid is formed inside the first mounting member, and the liquid chamber includes a main liquid chamber having the elastic body as a part of a wall surface by the partition member described above, The diaphragm is partitioned into a sub-liquid chamber having a part of the wall surface. Further, the above-described partition member is formed with a restriction passage that communicates the main liquid chamber and the sub liquid chamber. The restriction passage is a passage extending along a circumferential direction (a direction around the central axis of the first mounting member), and the passage length and the cross-sectional area of the restriction passage are inputted with vibrations in a specific frequency band. It is tuned so that liquid column resonance occurs.

上記した液体封入型の防振装置では、振動発生体から特定の周波数帯の振動が入力されると、弾性体が弾性変形し、この弾性体の変形に伴って主液室の内容積が変化し、液室内の液体が制限通路を通って主液室と副液室との間で往来する。このとき、制限通路を流通する液体に液柱共振が生じるため、振動が減衰されて振動受体に伝達される振動が低減される。 In the above-described liquid-filled vibration isolator, when vibration in a specific frequency band is input from the vibration generator, the elastic body elastically deforms, and the internal volume of the main liquid chamber changes as the elastic body deforms. Then, the liquid in the liquid chamber passes between the main liquid chamber and the sub liquid chamber through the restriction passage. At this time, since liquid column resonance occurs in the liquid flowing through the restriction passage, the vibration is attenuated and the vibration transmitted to the vibration receiver is reduced.

また、従来、例えば下記特許文献２に記載されているように、第一取付部材の内周面で制限通路の外周面を画成した防振装置が提供されている。詳しく説明すると、仕切り部材の外周面には、周方向に延在すると共に径方向外側に向けて開口した断面視コ字状の周溝が形成され、この周溝の開口部が第一取付部材の内周面で閉塞されており、これら周溝及び第一取付部材の内周面によって制限通路が形成されている。この制限通路は、周方向に沿って平面視Ｃ字状に延設されており、仕切り部材には、制限通路の流路方向の一端部と他端部とを区画する隔壁部が形成されている。この隔壁部は、周溝の天壁部（主液室側の壁部）と底壁部（副液室側の壁部）との間に立設された壁部であり、平面視において周溝の内周面から仕切り部材の外周面まで延設されて第一取付部材の内周面に当接されている。また、制限通路の流路方向の一端部には、主液室に向けて開口した主液室側開口部が形成され、制限通路の流路方向の他端部には、副液室に向けて開口した副液室側開口部が形成されている。このような構成の防振装置によれば、仕切り部材を大型化することなく制限通路の断面積を大きくすることができ、また、制限通路の外面を画成する外周壁を仕切り部材から省くことができるので、軽量化を図ることができる。 Conventionally, as described in Patent Document 2 below, for example, a vibration isolator is provided in which an outer peripheral surface of a restriction passage is defined by an inner peripheral surface of a first mounting member. More specifically, an outer circumferential surface of the partition member is formed with a circumferential groove having a U-shape in cross-sectional view that extends in the circumferential direction and opens outward in the radial direction, and the opening portion of the circumferential groove is a first mounting member. Are closed by the inner peripheral surface, and a restriction passage is formed by the peripheral grooves and the inner peripheral surface of the first mounting member. The restriction passage extends in a C shape in plan view along the circumferential direction, and the partition member is formed with a partition wall that partitions one end portion and the other end portion in the flow path direction of the restriction passage. Yes. This partition wall portion is a wall portion that is erected between the top wall portion (wall portion on the main liquid chamber side) and the bottom wall portion (wall portion on the sub liquid chamber side) of the circumferential groove. The groove extends from the inner peripheral surface of the groove to the outer peripheral surface of the partition member and is in contact with the inner peripheral surface of the first mounting member. In addition, an opening on the main liquid chamber side that opens toward the main liquid chamber is formed at one end in the flow path direction of the restriction passage, and the sub liquid chamber is directed at the other end in the flow path direction of the restriction passage. A secondary liquid chamber side opening is formed. According to the vibration isolator having such a configuration, the sectional area of the restriction passage can be increased without increasing the size of the partition member, and the outer peripheral wall defining the outer surface of the restriction passage can be omitted from the partition member. Therefore, the weight can be reduced.

特開２００９−９７６８８号公報JP 2009-97688 A 特開２００９−２８１４３１号公報JP 2009-281431 A

ところで、上記した液体封入型の防振装置では、制限通路の途中で液体が漏洩すると、上記した特定の周波数帯の振動入力時に液柱共振が生じなくなり、減衰性能に影響を及ぼすおそれがある。したがって、液体封入型の防振装置では、制限通路からの液体の漏洩を防止する必要がある。 By the way, in the above-described liquid-encapsulated vibration isolator, when liquid leaks in the middle of the restricted passage, liquid column resonance does not occur when vibrations in the specific frequency band are input, which may affect the damping performance. Therefore, in the liquid filled type vibration isolator, it is necessary to prevent leakage of the liquid from the restricted passage.

しかしながら、上記した後者の従来の防振装置では、仕切り部材の外周面に形成された周溝の開口部が第一取付部材の内周面で閉塞されることによって制限通路が形成されているので、制限通路における液体の漏洩が起こりやすいという問題がある。具体的には、仕切り部材の外周部とその外周部を係止する第一取付部材の係止部との間から液体が漏洩するおそれがある。
特に、筒状の第一取付部材と仕切り部材の素材が異なる場合には、製造の条件によってそれぞれ成形時の収縮量や使用時の熱収縮量に差が出ることにより、液体の漏洩が起こりうる。 However, in the latter conventional vibration isolator described above, the restriction passage is formed by the opening of the circumferential groove formed on the outer peripheral surface of the partition member being closed by the inner peripheral surface of the first mounting member. There is a problem that liquid leaks easily in the restriction passage. Specifically, the liquid may leak from between the outer peripheral portion of the partition member and the locking portion of the first mounting member that locks the outer peripheral portion.
In particular, when the materials of the cylindrical first mounting member and the partition member are different, liquid leakage may occur due to differences in the amount of shrinkage during molding and the amount of heat shrinkage during use depending on the manufacturing conditions. .

また、従来、例えば、制限通路の流路長を長くする必要があり、且つ、防振装置を設置するスペースに制約がある場合に、第一取付部材及び仕切り部材を平面視において楕円形や長方円形等の非真円形状に形成する場合がある。しかしながら、第一取付部材及び仕切り部材の平面視形状が非真円形状であると、第一取付部材の内側に仕切り部材を組み付ける際に、仕切り部材が第一取付部材に対して相対的に中心軸線回りに回転することで、隔壁部の外方側の端部と第一取付部材の内周面との間に隙間が生じやすく、液体の漏洩が起こるおそれがある。 In addition, conventionally, for example, when it is necessary to increase the flow path length of the restriction passage and the space for installing the vibration isolator is limited, the first mounting member and the partition member are oval or long in plan view. It may be formed in a non-circular shape such as a square shape. However, when the plan view shape of the first mounting member and the partition member is a non-circular shape, the partition member is relatively centered with respect to the first mounting member when the partition member is assembled inside the first mounting member. By rotating around the axis, a gap is likely to be formed between the outer end of the partition wall and the inner peripheral surface of the first mounting member, and there is a risk of liquid leakage.

また、第一取付部材及び仕切り部材の平面視形状が真円形状である場合には、第一取付部材の内側に仕切り部材を嵌め込んだ後に第一取付部材を径方向に加締めたり、或いは、テーパー形状の第一取付部材の内側に仕切り部材を押し込んだりすることで、仕切り部材の外周面を第一取付部材の内周面に密接させてシール性を向上させることができる。しかしながら、第一取付部材及び仕切り部材の平面視形状が非真円形状であると、第一取付部材を全周に亘って均一に加締めることが困難であり、また、第一取付部材をテーパー形状にしても仕切り部材の外周面を第一取付部材の内周面に全周に亘って密接させることが困難であり、シール性を確保することが難しい。 Further, when the plan view shape of the first mounting member and the partition member is a perfect circle shape, the first mounting member is crimped in the radial direction after the partition member is fitted inside the first mounting member, or By pushing the partition member inside the tapered first mounting member, the outer peripheral surface of the partition member can be brought into close contact with the inner peripheral surface of the first mounting member, thereby improving the sealing performance. However, when the planar shape of the first mounting member and the partition member is a non-circular shape, it is difficult to crimp the first mounting member uniformly over the entire circumference, and the first mounting member is tapered. Even if it is shaped, it is difficult to bring the outer peripheral surface of the partition member into close contact with the inner peripheral surface of the first mounting member over the entire circumference, and it is difficult to ensure sealing performance.

本発明は、上記した従来の問題が考慮されたものであり、制限通路における液体の漏洩を防止することができる防振装置を提供することを目的としている。 The present invention has been made in consideration of the above-described conventional problems, and an object thereof is to provide a vibration isolator capable of preventing liquid leakage in a restriction passage.

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第一取付部材、および他方に連結される第二取付部材と、前記第一取付部材及び前記第二取付部材を弾性的に連結する弾性体と、前記第一取付部材の内側に嵌め込まれ、前記第一取付部材の内側に形成された液室を、前記弾性体を壁面の一部とする軸方向一方側の主液室と軸方向他方側の副液室とに区画する仕切り部材と、を備えていると共に、前記主液室と前記副液室とを連通すると共に前記液室内の液体が流通することで液柱共振を生じさせる制限通路が形成された液体封入型の防振装置であって、前記制限通路の少なくとも一部は、前記仕切り部材の外周面に形成された周溝と該周溝の開口部を閉塞する第一取付部材の内周面とによって形成されており、前記第一取付部材に、前記仕切り部材の外周部を軸方向から係止する係止部が設けられ、該係止部及び前記仕切り部材の外周部のうちの少なくとも一方の係止面に、前記仕切り部材の外周部と前記係止部との間をシールする凹状又は凸状のシール部が形成され、前記隔壁部が、平面視において前記第一取付部材の内周面に対して斜めに配設され、前記制限通路の流路方向に沿って延設されていることを特徴としている。 The vibration isolator according to the present invention includes a cylindrical first mounting member coupled to one of the vibration generating unit and the vibration receiving unit, a second mounting member coupled to the other, and the first mounting. An elastic body that elastically connects the member and the second mounting member; and a liquid chamber that is fitted inside the first mounting member and formed inside the first mounting member. A partition member that divides the main liquid chamber on one side in the axial direction and the sub liquid chamber on the other side in the axial direction, and communicates the main liquid chamber and the sub liquid chamber with the liquid. A liquid-filled vibration isolator in which a restriction passage that causes liquid column resonance is generated by circulation of liquid in a room, wherein at least part of the restriction passage is formed on an outer peripheral surface of the partition member. Formed by the circumferential groove and the inner circumferential surface of the first mounting member that closes the opening of the circumferential groove The first mounting member is provided with a locking portion for locking the outer peripheral portion of the partition member from the axial direction, and at least one of the locking portion and the outer peripheral portion of the partition member is locked. A concave or convex seal portion that seals between the outer peripheral portion of the partition member and the locking portion is formed on the surface, and the partition wall portion is opposed to the inner peripheral surface of the first mounting member in a plan view. It is characterized by being arranged obliquely and extending along the flow path direction of the restriction passage .

このような特徴により、仕切り部材の外周部と係止部との間がシール部によってシールされ、仕切り部材の外周部における軸方向のシール性が向上する。仮に、第一取付部材と仕切り部材の材料が異なり、使用時の熱収縮量に差があって、径方向の寸法ズレが生じた場合であっても、係止部の径方向の幅の分だけ上記した熱収縮量の差を吸収することができ、上記したシール部のシール性は影響を受けることが無く、安定したシール性を確保することができる。
また、仕切り部材の外周面に周溝が形成され、その周溝の開口部が第一取付部材の内周面によって閉塞されることで、制限通路の少なくとも一部が形成されているため、仕切り部材を大型化することなく制限通路の断面積を大きくすることが可能であり、また、制限通路の外面を画成する外周壁が仕切り部材から省かれるので、防振装置が軽量化される。
また、隔壁部が平面視において第一取付部材の内周面に対して一方側に傾いて配設され、制限通路を流通する液体が隔壁部に沿って流通するので、隔壁部に作用する液体の流圧が小さくなり、隔壁部の外方側の端部における液体の漏洩が生じにくくなる。 With such a feature, the space between the outer peripheral portion of the partition member and the engaging portion is sealed by the seal portion, and the axial sealing performance at the outer peripheral portion of the partition member is improved. Even if the material of the first mounting member and the partition member are different and there is a difference in the amount of heat shrinkage during use, resulting in radial displacement, the amount of the radial width of the locking portion Only the difference in the amount of heat shrinkage described above can be absorbed, and the sealing performance of the sealing portion described above is not affected, and a stable sealing performance can be ensured.
In addition, since the peripheral groove is formed on the outer peripheral surface of the partition member and the opening of the peripheral groove is blocked by the inner peripheral surface of the first mounting member, at least a part of the restriction passage is formed. The cross-sectional area of the restriction passage can be increased without increasing the size of the member, and the outer peripheral wall that defines the outer surface of the restriction passage is omitted from the partition member.
In addition, since the partition wall portion is disposed to be inclined to one side with respect to the inner peripheral surface of the first mounting member in a plan view, and the liquid flowing through the restriction passage flows along the partition wall portion, the liquid acting on the partition wall portion The flow pressure of the liquid becomes small, and it is difficult for liquid to leak at the outer end of the partition wall.

また、本発明に係る防振装置は、前記仕切り部材の外形が、平面視において楕円形状又は長方円形状となっているものに好適に用いられる。
このように仕切り部材の外形が平面視楕円形状又は長方円形状の防振装置は、例えば本体ゴム（弾性体）を円錐形にしておおよそのバネを固定したまま、制限通路の流路長を長く確保したい場合などによく用いられる。その場合、シール性を確保することが難しいが、本発明に係る防振装置によれば、仕切り部材の外形が、平面視において楕円形状又は長方円形状となっている場合であってもシール性を確保することができる。 In addition, the vibration isolator according to the present invention is preferably used for an outer shape of the partition member that is elliptical or rectangular in plan view.
In this way, the vibration isolator having an outer shape of the partition member having an elliptical shape or a rectangular shape in plan view has, for example, the main body rubber (elastic body) formed in a conical shape, and the flow length of the restriction passage is increased while the approximate spring is fixed. It is often used when you want to secure a long time. In that case, it is difficult to ensure sealing performance. However, according to the vibration isolator of the present invention, the seal member is sealed even when the outer shape of the partition member is elliptical or rectangular in plan view. Sex can be secured.

ところで、仕切り部材に、平面視において仕切り部材の内方側から仕切り部材の外方側に向かって延在して制限通路を画成する隔壁部が設けられている場合、隔壁部の外方側の端部と第一取付部材の内周面との当接面において液体の漏洩が起こりやすい。
そこで、本発明に係る防振装置は、前記仕切り部材に、平面視において該仕切り部材の内方側から該仕切り部材の外方側に向かって延在して前記制限通路を画成する隔壁部が設けられ、該隔壁部の外方側の端部が、前記仕切り部材の外周面よりも径方向外方側に突出され、前記第一取付部材の内周面に密接されていることが好ましい。
これにより、隔壁部の外方側の端部が第一取付部材の内周面に径方向に密接されるので、隔壁部の外方側の端部と第一取付部材の内周面との間がシールされ、隔壁部の外方側の端部における径方向のシール性が向上する。 By the way, when the partition member is provided with a partition wall portion extending from the inner side of the partition member toward the outer side of the partition member in a plan view and defining a restriction passage, the outer side of the partition wall portion Liquid leakage tends to occur at the contact surface between the end of the first mounting member and the inner peripheral surface of the first mounting member.
Therefore, the vibration isolator according to the present invention includes a partition wall portion that extends from the inner side of the partition member toward the outer side of the partition member in the plan view to define the restriction passage. It is preferable that the outer end of the partition wall protrudes radially outward from the outer peripheral surface of the partition member and is in close contact with the inner peripheral surface of the first mounting member. .
As a result, the outer end of the partition wall is radially in close contact with the inner peripheral surface of the first mounting member, so that the outer end of the partition wall and the inner peripheral surface of the first mounting member The gap is sealed, and the radial sealability at the outer end of the partition wall is improved.

また、本発明に係る防振装置は、前記制限通路の流路方向の一端部に配設されて前記主液室に向けて開口された主液室側開口部、又は、前記制限通路の流路方向の他端部に配設されて前記副液室に向けて開口された副液室側開口部が、平面視において前記第一取付部材の内周面と前記隔壁部とが成す鋭角側部分に配設されていることが好ましい。
これにより、隔壁部の平面視における第一取付部材の内周面に対する鈍角部分側の表面に液体の流圧が作用するが、隔壁部の平面視における第一取付部材の内周面に対する鋭角部分側において主液室側開口部又は副液室側開口部から液体が流出するので、隔壁部の鋭角部分側の表面に作用する液体の流圧は小さくなる。このため、隔壁部が平面視における鋭角部分側に向けて押圧され、隔壁部の外方側の端部が第一取付部材の内周面に密接された状態が維持される。 Further, the vibration isolator according to the present invention includes a main liquid chamber side opening disposed at one end in the flow path direction of the restriction passage and opened toward the main liquid chamber, or the flow of the restriction passage. The sub-liquid chamber side opening disposed at the other end portion in the road direction and opened toward the sub-liquid chamber is an acute angle side formed by the inner peripheral surface of the first mounting member and the partition wall in a plan view. It is preferable to be disposed in the part.
Thereby, although the fluid pressure of the liquid acts on the surface on the obtuse angle portion side with respect to the inner peripheral surface of the first mounting member in the plan view of the partition wall portion, the acute angle portion with respect to the inner peripheral surface of the first mounting member in the plan view of the partition wall portion. Since the liquid flows out from the main liquid chamber side opening or the sub liquid chamber side opening on the side, the fluid flow pressure acting on the surface on the acute angle portion side of the partition wall portion is reduced. For this reason, the partition part is pressed toward the acute angle part side in plan view, and the state where the outer end part of the partition part is in close contact with the inner peripheral surface of the first mounting member is maintained.

本発明に係る防振装置によれば、第一取付部材の係止部とその係止部に軸方向から係止される仕切り部材の外周部との間における軸方向のシール性が向上するので、制限通路における液体の漏洩を防止することができる。 According to the vibration isolator of the present invention, the axial sealing performance between the locking portion of the first mounting member and the outer peripheral portion of the partition member locked to the locking portion from the axial direction is improved. , It is possible to prevent liquid leakage in the restriction passage.

本発明の実施の形態を説明するための防振装置の平面図である。It is a top view of the vibration isolator for demonstrating embodiment of this invention. 図１に示すＡ−Ａ間の断面図である。It is sectional drawing between AA shown in FIG. 図１に示すＢ−Ｂ間の断面図である。It is sectional drawing between BB shown in FIG. 本発明の実施の形態を説明するための仕切り部材本体の斜視図である。It is a perspective view of the partition member main body for demonstrating embodiment of this invention. 本発明の実施の形態の変形例を説明するための仕切り部材本体の部分斜視図である。It is a fragmentary perspective view of the partition member main body for demonstrating the modification of embodiment of this invention. 本発明の実施の形態の変形例を説明するための防振装置の部分断面図である。It is a fragmentary sectional view of the vibration isolator for demonstrating the modification of embodiment of this invention.

以下、本発明に係る防振装置の実施の形態について、図面に基いて説明する。
なお、図２、図３に示す符号Ｏ_１は第一取付部材２の中心軸線を示しており、以下、単に「第一軸線Ｏ_１」と記す。また、第一軸線Ｏ_１に平行する符号Ｏ_２は第二取付部材３の中心軸線を示しており、以下、単に「第二軸線Ｏ_２」と記す。また、軸線Ｏ_１、Ｏ_２に沿った方向を「軸方向」とし、軸線Ｏ_１、Ｏ_２に垂直な方向を「径方向」とし、軸線Ｏ_１、Ｏ_２回りの方向を「周方向」とする。
さらに、図２、図３における下側が、防振装置１を設置した際に静荷重（初期荷重）が入力されるバウンド側であり、図２、図３における上側が、前記静荷重の入力方向の反対側のリバウンド側であり、以下の説明においてバウンド側を「下」とし、リバウンド側を「上」とする。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a vibration isolator according to the present invention will be described with reference to the drawings.
Incidentally, FIG. 2, reference numeral O ₁ shown in FIG. 3 shows a central axis of the first attachment member 2, hereinafter, simply referred to as "first axis O _1". The symbol O ₂ parallel to the first axis O ₁ indicates the central axis of the second mounting member 3, and is simply referred to as “second axis O ₂ ” hereinafter. Further, the direction along the axes O ₁ and O ₂ is referred to as “axial direction”, the direction perpendicular to the axes O ₁ and O ₂ is referred to as “radial direction”, and the direction around the axes O ₁ and O ₂ is referred to as “circumferential direction”. And
Further, the lower side in FIGS. 2 and 3 is a bound side to which a static load (initial load) is input when the vibration isolator 1 is installed, and the upper side in FIGS. 2 and 3 is an input direction of the static load. In the following description, the bound side is “down” and the rebound side is “up”.

図１から図３に示す防振装置１は、自動車における振動発生部であるエンジンを、振動受部である車体へ支持するエンジンマウントである。この防振装置１は、図示せぬ車体に連結される筒状の第一取付部材２と、第一取付部材２の上方に配設されていると共に図示せぬエンジンに連結される第二取付部材３と、第一取付部材２と第二取付部材３を弾性的に連結すると共に第一取付部材２の上端部を閉塞する弾性体４と、第一取付部材２の内側に嵌め込まれた仕切り部材５と、第一取付部材２の下端部を閉塞するダイヤフラム６と、を備えている。そして、上記した第一取付部材２の内側には、上記した弾性体４とダイヤフラム６によって密封された液密空間の液室１０が形成されており、この液室１０には例えばエチレングリコールや水等の液体が封入されている。 A vibration isolator 1 shown in FIGS. 1 to 3 is an engine mount that supports an engine that is a vibration generating unit in an automobile to a vehicle body that is a vibration receiving unit. The vibration isolator 1 includes a cylindrical first attachment member 2 connected to a vehicle body (not shown), and a second attachment that is disposed above the first attachment member 2 and connected to an engine (not shown). A member 3, an elastic body 4 that elastically connects the first mounting member 2 and the second mounting member 3 and closes the upper end portion of the first mounting member 2, and a partition fitted inside the first mounting member 2 A member 5 and a diaphragm 6 that closes the lower end of the first mounting member 2 are provided. A liquid chamber 10 in a liquid tight space sealed by the elastic body 4 and the diaphragm 6 is formed inside the first mounting member 2. The liquid chamber 10 includes, for example, ethylene glycol or water. Etc. are enclosed.

第一取付部材２は、軸方向に沿って延在する平面視長方円形状の筒体であり、第一取付部材２の軸線Ｏ_１は、第二取付部材３の軸線Ｏ_２から長手方向に偏心した位置に配設されている。第一取付部材２は、上方から下方に向かって段状に縮径されている。詳しく説明すると、第一取付部材２には、上筒部２０と、上筒部２０の下端部から全周に亘って径方向内側に向かって突出した環状の上段差部２１と、上段差部２１の内縁から垂下された中筒部２２と、中筒部２２の下端部から全周に亘って径方向内側に向かって突出した環状の下段差部２３（本発明における係止部）と、下段差部２３の内縁から垂下された下筒部２４と、を備えている。 The first mounting member 2 is a cylindrical body having a rectangular shape in plan view extending along the axial direction, and the axis O ₁ of the first mounting member 2 is longitudinal from the axis O ₂ of the second mounting member 3. It is arranged at an eccentric position. The first attachment member 2 is reduced in diameter in a step shape from above to below. More specifically, the first mounting member 2 includes an upper tube portion 20, an annular upper step portion 21 projecting radially inward from the lower end portion of the upper tube portion 20, and an upper step portion. An intermediate cylindrical portion 22 that is suspended from the inner edge of 21, an annular lower step portion 23 (a locking portion in the present invention) that protrudes radially inward from the lower end of the intermediate cylindrical portion 22, and And a lower cylinder part 24 suspended from the inner edge of the lower step part 23.

上筒部２０は、上方に向かって漸次拡径したテーパー形状に形成されている。この上筒部２０の上端部には、径方向内側に折り曲げられた複数の爪部２５が設けられている。複数の爪部２５は、第一取付部材２の全周に亘って周方向に間欠的に配設されている。中筒部２２は、上筒部２０よりも小径の筒部であり、上方に向かって漸次拡径したテーパー形状に形成されている。下筒部２４は、中筒部２２よりも小径の筒部であり、直筒形状に形成されている。上段差部２１は、上筒部２０の下端と中筒部２２の上端との間に形成された段差部であり、下段差部２３は、中筒部２２の下端と下筒部２４の上端との間に形成された段差部であり、これら上段差部２１及び下段差部２３は、それぞれ軸線Ｏ_１に対して垂直に形成されている。また、下段差部２３は、仕切り部材５の外周部を軸方向下側から係止する係止部であり、この下段差部２３の上面が、仕切り部材５の外周部を係止する係止面となっている。 The upper cylinder part 20 is formed in the taper shape which diameter expanded gradually upwards. A plurality of claw portions 25 bent inward in the radial direction are provided at the upper end portion of the upper cylindrical portion 20. The plurality of claw portions 25 are intermittently disposed in the circumferential direction over the entire circumference of the first mounting member 2. The middle tube portion 22 is a tube portion having a smaller diameter than the upper tube portion 20, and is formed in a tapered shape that gradually increases in diameter upward. The lower cylinder part 24 is a cylinder part having a smaller diameter than the middle cylinder part 22, and is formed in a straight cylinder shape. The upper step portion 21 is a step portion formed between the lower end of the upper tube portion 20 and the upper end of the middle tube portion 22, and the lower step portion 23 is the upper end of the lower tube portion 24 and the lower end of the lower tube portion 24. The upper step portion 21 and the lower step portion 23 are each formed perpendicular to the axis O ₁ . Further, the lower step portion 23 is a locking portion that locks the outer peripheral portion of the partition member 5 from the lower side in the axial direction, and the upper surface of the lower step portion 23 locks the outer peripheral portion of the partition member 5. It is a surface.

また、上記した第一取付部材２の内周面には、ゴムや合成樹脂等の弾性材料からなる被覆膜２６が被覆されている。この被覆膜２６は、第一取付部材２の内周面のうち、下筒部２４の下端から上段差部２１の上面の径方向中間部までの範囲を全周に亘って被覆する膜体であり、上段差部２１の内周部の上面、中筒部２２の内周面、下段差部２３の上面及び下筒部２４の内周面にそれぞれ被覆膜２６が接着されている。 The inner peripheral surface of the first mounting member 2 is covered with a coating film 26 made of an elastic material such as rubber or synthetic resin. The covering film 26 covers the entire circumference of the inner peripheral surface of the first mounting member 2 from the lower end of the lower cylindrical portion 24 to the radially intermediate portion of the upper surface of the upper step portion 21. The covering film 26 is bonded to the upper surface of the inner peripheral portion of the upper step portion 21, the inner peripheral surface of the middle cylindrical portion 22, the upper surface of the lower step portion 23, and the inner peripheral surface of the lower cylindrical portion 24.

ダイヤフラム６は、ゴムや合成樹脂等の弾性材料からなる変形可能な膜体であり、上記した被覆膜２６と一体に形成されている。ダイヤフラム６は、平面視長方円形状に形成されていると共に上方に膨出したドーム形状（逆さ椀形状）に形成されており、ダイヤフラム６の外周部は、下筒部２４の内周面を被覆する被覆膜２６に全周に亘って一体に連結されている。
なお、上記したダイヤフラム６及び被覆膜２６を第一取付部材２と共に加硫成形することで被覆膜２６が第一取付部材２の内周面に接着される。 The diaphragm 6 is a deformable film body made of an elastic material such as rubber or synthetic resin, and is formed integrally with the covering film 26 described above. The diaphragm 6 is formed in a rectangular shape in plan view and is formed in a dome shape (upside down shape) that bulges upward. The outer peripheral portion of the diaphragm 6 is the inner peripheral surface of the lower cylinder portion 24. The coating film 26 to be coated is integrally connected over the entire circumference.
Note that the diaphragm 6 and the coating film 26 are vulcanized and molded together with the first mounting member 2 so that the coating film 26 is bonded to the inner peripheral surface of the first mounting member 2.

第二取付部材３は、図示せぬエンジンブラケットにボルト固定するための雌ねじ孔３０が形成された金具であり、第一取付部材２の長手方向の片側に寄せて配設されている。第二取付部材３の概略構成としては、軸方向に延在する柱状部３１と、柱状部の下端に設けられたアンカー部３２と、アンカー部３２の上端部に設けられたストッパー部３３と、を備えている。 The second attachment member 3 is a metal fitting in which a female screw hole 30 for fixing a bolt to an engine bracket (not shown) is formed, and is arranged close to one side of the first attachment member 2 in the longitudinal direction. As a schematic configuration of the second mounting member 3, a columnar portion 31 extending in the axial direction, an anchor portion 32 provided at the lower end of the columnar portion, a stopper portion 33 provided at the upper end portion of the anchor portion 32, It has.

雌ねじ孔３０は、軸線Ｏ_２を中心軸線にして軸方向に延在しており、柱状部３１の上端面で上方に向けて開口されている。アンカー部３２は、柱状部３１に対して拡径された拡径部であり、アンカー部３２の下端部は、下方に向かって漸次縮径されたテーパー形状に形成されている。また、アンカー部３２の下端面には穴状の凹部３４が形成されており、この凹部３４の内周面には例えばゴムや合成樹脂等の弾性材料からなる被覆膜３７が被覆されている。ストッパー部３３は、アンカー部３２の上端部外周面から全周に亘って径方向外側に突出したフランジ部３５の外周面及び上面に例えばゴムや合成樹脂等の弾性材料からなる緩衝部３６が被覆された構成からなる。 The female screw hole 30 extends in the axial direction with the axis O ₂ as the central axis, and is opened upward at the upper end surface of the columnar portion 31. The anchor portion 32 is a diameter-expanded portion that is larger than the columnar portion 31, and the lower end portion of the anchor portion 32 is formed in a tapered shape that is gradually reduced in diameter downward. Further, a hole-like recess 34 is formed on the lower end surface of the anchor portion 32, and an inner peripheral surface of the recess 34 is covered with a coating film 37 made of an elastic material such as rubber or synthetic resin. . The stopper portion 33 is covered with a buffer portion 36 made of an elastic material such as rubber or synthetic resin on the outer peripheral surface and the upper surface of the flange portion 35 projecting radially outward from the outer peripheral surface of the upper end portion of the anchor portion 32 over the entire circumference. It consists of made.

弾性体４は、第二取付部材３を支持する弾性変形可能な支持部であり、例えばゴムや合成樹脂等の弾性材料からなる。弾性体４の外周面は、下方に向かって漸次拡径された円錐台形状に形成されており、弾性体４は、第二取付部材３の軸線Ｏ_２を中心軸線にして配設されている。また、弾性体４は中空形状に形成されており、弾性体４の内側に液室１０（後述する主液室１１）が形成されている。この弾性体４の上端部は、第二取付部材３のアンカー部３２の外周面に接着されている。 The elastic body 4 is an elastically deformable support portion that supports the second mounting member 3 and is made of an elastic material such as rubber or synthetic resin. The outer peripheral surface of the elastic body 4 is formed in a truncated cone shape that gradually increases in diameter downward, and the elastic body 4 is disposed with the axis O ₂ of the second mounting member 3 as the central axis. . The elastic body 4 is formed in a hollow shape, and a liquid chamber 10 (a main liquid chamber 11 described later) is formed inside the elastic body 4. The upper end portion of the elastic body 4 is bonded to the outer peripheral surface of the anchor portion 32 of the second mounting member 3.

上記した弾性体４の下端部には、第一取付部材２に取り付けられる取付金具７が接着されている。取付金具７は、平面視長方円形状の板材であり、第一取付部材２の上筒部２０の内側に嵌合されている。この取付金具７の外周部は、上記した爪部２５を径方向内側に折り曲げて加締めることで爪部２５と上段差部２１との間に挟み込まれて固定されている。また、取付金具７の外周部の下面には、取付金具７の外周部と上段差部２１を被覆する被覆膜２６との間をシールする凹溝状のシール部７１が全周に亘って形成されている。また、取付金具７のうち、弾性体４の内部空間（後述する主液室１１）に対応する部分には、第二取付部材３の軸線Ｏ_２を中心にして形成された平面視円形の開口７０が形成されている。そして、取付金具７の上面のうち、開口７０の周りの部分、及び開口７０の内周面には、弾性体４の下端部が接着されている。 An attachment fitting 7 attached to the first attachment member 2 is bonded to the lower end portion of the elastic body 4 described above. The mounting bracket 7 is a plate material having a rectangular shape in plan view, and is fitted inside the upper tube portion 20 of the first mounting member 2. The outer peripheral portion of the mounting bracket 7 is sandwiched and fixed between the claw portion 25 and the upper step portion 21 by bending the claw portion 25 inward in the radial direction and crimping. Further, on the lower surface of the outer peripheral portion of the mounting bracket 7, a groove-shaped seal portion 71 that seals between the outer peripheral portion of the mounting bracket 7 and the coating film 26 that covers the upper stepped portion 21 extends over the entire circumference. Is formed. In addition, in the mounting bracket 7, a portion corresponding to an internal space (a main liquid chamber 11 described later) of the elastic body 4 has a circular opening in plan view formed around the axis O ₂ of the second mounting member 3. 70 is formed. And the lower end part of the elastic body 4 is adhere | attached on the part surrounding the opening 70 and the inner peripheral surface of the opening 70 among the upper surfaces of the mounting bracket 7.

なお、上記した弾性体４は、上記した被覆膜３７及び緩衝部３６と一体に形成されている。また、弾性体４、緩衝部３６及び被覆膜３７を上記した取付金具７及び第二取付部材３と共に加硫成形することで、弾性体４の下端部が取付金具７に接着されると共に弾性体４の上端部がアンカー部３２に接着され、また、ストッパー部３３の緩衝部３６がフランジ部３５に接着され、被覆膜３７がアンカー部３２の凹部３４の内周面に接着される。 The elastic body 4 described above is formed integrally with the coating film 37 and the buffer portion 36 described above. Further, by elastically molding the elastic body 4, the buffer portion 36 and the coating film 37 together with the mounting bracket 7 and the second mounting member 3, the lower end portion of the elastic body 4 is bonded to the mounting bracket 7 and is elastic. The upper end portion of the body 4 is bonded to the anchor portion 32, the buffer portion 36 of the stopper portion 33 is bonded to the flange portion 35, and the coating film 37 is bonded to the inner peripheral surface of the concave portion 34 of the anchor portion 32.

仕切り部材５は、液室１０を、弾性体４を壁面の一部とする軸方向上側の主液室１１と、ダイヤフラム６を壁面の一部とする軸方向下側の副液室１２と、に区画する部材であり、第一取付部材２の中筒部２２の内側に嵌合されている。詳しく説明すると、仕切り部材５は、外形が平面視において長方円形状に形成された部材であり、仕切り部材本体５０と、蓋体５１と、可動板５２と、を備えている。 The partition member 5 includes a liquid chamber 10, an axially upper main liquid chamber 11 having the elastic body 4 as a part of the wall surface, an axially lower sub liquid chamber 12 having the diaphragm 6 as a part of the wall surface, The first mounting member 2 is fitted inside the middle cylinder portion 22. More specifically, the partition member 5 is a member whose outer shape is formed in a rectangular shape in plan view, and includes a partition member main body 50, a lid body 51, and a movable plate 52.

仕切り部材本体５０は、合成樹脂からなる成形品であり、この仕切り部材本体５０には、図４に示すように、軸方向に沿って延設された筒状部５３と、筒状部５３の下端部から径方向外側に向けて突出した下壁部５４と、下壁部５４上に立設された隔壁部５５及び内壁部５６と、筒状部５３の内側に配設された底壁部５７と、が備えられている。 The partition member main body 50 is a molded product made of a synthetic resin. As shown in FIG. 4, the partition member main body 50 includes a cylindrical portion 53 that extends along the axial direction, and a cylindrical portion 53. A lower wall portion 54 projecting radially outward from the lower end portion, a partition wall portion 55 and an inner wall portion 56 erected on the lower wall portion 54, and a bottom wall portion disposed inside the tubular portion 53 57.

筒状部５３は、上下端がそれぞれ開口した円筒形状の筒部であり、軸線Ｏ_２を中心軸線にして延設されている。
下壁部５４は、軸線Ｏ_１に対して垂直に配設された板部であり、下壁部５４の外縁は、平面視長方円形状に形成されている。この下壁部５４の外周部の下面は、第一取付部材２の下段差部２３の上面に係止された係止面であり、この係止面には、下壁部５４の外縁に沿って延在する凸状のシール部５８が形成されている。このシール部５８は、後述する副液室側開口部１６の箇所を除く下壁部５４の外縁全長に亘って延設されており、このシール部５８の下端面は、第一取付部材２の下段差部２３の上面に被覆された被覆膜２６に全長に亘って密接されている。 The tubular portion 53 is a cylindrical tubular portion having upper and lower ends opened, and extends with the axis O ₂ as the central axis.
The lower wall portion 54 is a plate portion disposed perpendicular to the axis O ₁ , and the outer edge of the lower wall portion 54 is formed in a rectangular shape in plan view. The lower surface of the outer peripheral portion of the lower wall portion 54 is a locking surface that is locked to the upper surface of the lower step portion 23 of the first mounting member 2, and this locking surface is along the outer edge of the lower wall portion 54. A convex seal portion 58 extending in the direction is formed. The seal portion 58 extends over the entire length of the outer edge of the lower wall portion 54 excluding the location of the sub-liquid chamber side opening 16 to be described later, and the lower end surface of the seal portion 58 is formed on the first mounting member 2. The entire surface of the lower step portion 23 is in close contact with the coating film 26 coated on the upper surface.

隔壁部５５は、下壁部５４に対して垂直に立設した壁部であり、下壁部５４の半円弧状の外縁の径方向内側に配設されている。また、隔壁部５５は、筒状部５３の外周面から下壁部５４の外縁に沿って延在し、さらに、仕切り部材５の内方側から仕切り部材５の外方側に向かって延在している。つまり、隔壁部５５の一方側の側端部は筒状部５３の外周面に一体に連結され、隔壁部５５の中間部は、平面視略半円弧状に形成されている。また、隔壁部５５の他方側の部分は、平面視において第一取付部材２の内周面に対して斜めに配設されており、後述する制限通路１３の流路方向に沿って延設されている。そして、隔壁部５５の他方側の側端部（外方側の端部５５ａ）は、仕切り部材５の外周面よりも径方向外方側に突出されており、隔壁部５５の外方側の端面５５ｂは、第一取付部材２の内周面に密接されている。 The partition wall portion 55 is a wall portion erected perpendicularly to the lower wall portion 54, and is disposed on the radially inner side of the semicircular arc-shaped outer edge of the lower wall portion 54. The partition wall 55 extends from the outer peripheral surface of the cylindrical portion 53 along the outer edge of the lower wall portion 54, and further extends from the inner side of the partition member 5 toward the outer side of the partition member 5. doing. That is, one side end portion of the partition wall portion 55 is integrally connected to the outer peripheral surface of the cylindrical portion 53, and an intermediate portion of the partition wall portion 55 is formed in a substantially semicircular shape in plan view. Further, the other side portion of the partition wall portion 55 is disposed obliquely with respect to the inner peripheral surface of the first mounting member 2 in a plan view, and extends along the flow path direction of the restriction passage 13 described later. ing. The other side end portion (outer end portion 55 a) of the partition wall portion 55 protrudes radially outward from the outer peripheral surface of the partition member 5. The end surface 55 b is in close contact with the inner peripheral surface of the first mounting member 2.

内壁部５６は、平面視半円弧状の隔壁部５５の径方向内側に配設されており、両端部が筒状部５３の外周面にそれぞれ一体に連結されている。
底壁部５７は、軸線Ｏ_１に対して垂直に配設された板部であり、筒状部５３の軸方向の中間部に配設されている。この底壁部５７には、複数の開口５７ａが形成されている。 The inner wall portion 56 is disposed on the radially inner side of the partition wall portion 55 having a semicircular arc shape in plan view, and both end portions thereof are integrally connected to the outer peripheral surface of the cylindrical portion 53.
The bottom wall portion 57 is a plate portion disposed perpendicularly to the axis O ₁ , and is disposed at an intermediate portion in the axial direction of the tubular portion 53. A plurality of openings 57 a are formed in the bottom wall portion 57.

蓋体５１は、アルミ製の平面視長方円形状の平板部材であり、軸線Ｏ_１に対して垂直に配設されていると共に仕切り部材本体５０の上面に載置されている。この蓋体５１のうち、上記した筒状部５３の内側に対応する位置に、複数の開口５１ａが形成されている。この蓋体５１の上面には、上記した取付金具７が係止されており、蓋体５１及び仕切り部材本体５０は、取付金具７と下段差部２３との間に挟持されている。 The lid body 51 is a flat plate member made of aluminum and having a rectangular shape in plan view. The lid body 51 is disposed perpendicular to the axis O ₁ and is placed on the upper surface of the partition member main body 50. A plurality of openings 51 a are formed in the lid 51 at a position corresponding to the inside of the cylindrical portion 53 described above. The mounting bracket 7 is locked on the upper surface of the lid 51, and the lid 51 and the partition member body 50 are sandwiched between the mounting bracket 7 and the lower step portion 23.

可動板５２は、筒状部５３の内径よりも小径の円盤状の部材であり、例えばゴムや合成樹脂等の弾性材からなる。この可動板５２は、上記した筒状部５３の内側のうちの底壁部５７と蓋体５１との間に収容されており、底壁部５７と蓋体５１との間で上下に振動可能となっている。 The movable plate 52 is a disk-shaped member having a smaller diameter than the inner diameter of the cylindrical portion 53, and is made of an elastic material such as rubber or synthetic resin. The movable plate 52 is housed between the bottom wall portion 57 and the lid body 51 inside the cylindrical portion 53 described above, and can be vibrated up and down between the bottom wall portion 57 and the lid body 51. It has become.

また、防振装置１には、主液室１１と副液室１２とを連通する制限通路１３が形成されている。この制限通路１３は、液室１０内の液体が流通する流通路であり、制限通路１３の流路長及び断面積は、シェイク振動入力時に液柱共振が生じるようにチューニングされている。 Further, the vibration isolator 1 is formed with a restriction passage 13 that communicates the main liquid chamber 11 and the sub liquid chamber 12. The restriction passage 13 is a flow passage through which the liquid in the liquid chamber 10 flows, and the flow path length and cross-sectional area of the restriction passage 13 are tuned so that liquid column resonance occurs when shake vibration is input.

上記した制限通路１３は、仕切り部材５の外周部に形成されて第一取付部材２の内周面に沿って軸線Ｏ_１周りに延在する外周通路部１４と、仕切り部材５の中央部分（外周通路部１４よりも径方向内側の部分）に配設されて外周通路部１４に沿って延在する内周通路部１５と、からなる。 The restriction passage 13 described above is formed in the outer peripheral portion of the partition member 5 and extends around the axis O ₁ along the inner peripheral surface of the first mounting member 2, and the central portion of the partition member 5 ( And an inner peripheral passage portion 15 that is disposed on the radially inner side of the outer peripheral passage portion 14 and extends along the outer peripheral passage portion 14.

外周通路部１４は、仕切り部材５の外周面に形成されて軸線Ｏ_１周りに延在する周溝５９と、その周溝５９の開口部を閉塞する第一取付部材２の内周面（被覆膜２６）と、によって画成された断面視略直角台形状の通路である。上記した周溝５９は、仕切り部材本体５０の下壁部５４の外周部の上面と、隔壁部５５及び筒状部５３の外周面と、蓋体５１の外周部の下面と、によって画成されている。外周通路部１４の流路方向の一端部は他端部の近傍まで延在されており、平面視において略長方円形状に形成されている。 The outer peripheral passage portion 14 is formed on the outer peripheral surface of the partition member 5 and extends around the axis O ₁ , and the inner peripheral surface (covered) of the first mounting member 2 that closes the opening of the peripheral groove 59. And a passage 26 having a substantially right trapezoidal shape in a sectional view defined by the covering film 26). The above-described circumferential groove 59 is defined by the upper surface of the outer peripheral portion of the lower wall portion 54 of the partition member main body 50, the outer peripheral surfaces of the partition wall portion 55 and the cylindrical portion 53, and the lower surface of the outer peripheral portion of the lid body 51. ing. One end portion of the outer peripheral passage portion 14 in the flow path direction extends to the vicinity of the other end portion, and is formed in a substantially rectangular shape in plan view.

内周通路部１５は、隔壁部５５によって外周通路部１４に対して区画された断面視矩形状の通路であり、外周通路部１４の流路方向一方側の半円弧部分に沿って延在している。この内周通路部１５は、下壁部５４の上面と、隔壁部５５の内周面と、その内周面に対向する内壁部５６の外周面と、蓋体５１の下面と、によって画成されている。 The inner peripheral passage portion 15 is a passage having a rectangular shape in section when partitioned by the partition wall portion 55 from the outer peripheral passage portion 14, and extends along a semicircular arc portion on one side in the flow path direction of the outer peripheral passage portion 14. ing. The inner peripheral passage portion 15 is defined by the upper surface of the lower wall portion 54, the inner peripheral surface of the partition wall portion 55, the outer peripheral surface of the inner wall portion 56 facing the inner peripheral surface, and the lower surface of the lid 51. Has been.

また、上記した仕切り部材本体５０には、副液室１２に向けて開口されて制限通路１３と副液室１２とを連通する副液室側開口部１６が形成されている。この副液室側開口部１６は、制限通路１３の流路方向の一方側の端部に形成されており、平面視において第一取付部材２の内周面と隔壁部５５とが成す鋭角側部分、つまり、隔壁部５５の外方側の端部５５ａの外周面側の位置に配設されている。この副液室側開口部１６は、下壁部５４の外周部の一部を切り欠いて形成された開口である。
また、上記した蓋体５１には、制限通路１３の流路方向の他方側の端部に形成されて制限通路１３と主液室１１とを連通する図示せぬ主液室側開口部が形成されている。 The partition member main body 50 is formed with a sub liquid chamber side opening 16 that opens toward the sub liquid chamber 12 and communicates the restriction passage 13 and the sub liquid chamber 12. The sub liquid chamber side opening 16 is formed at one end of the restriction passage 13 in the flow path direction, and is formed on the acute angle side formed by the inner peripheral surface of the first mounting member 2 and the partition wall portion 55 in plan view. A portion, that is, a position on the outer peripheral surface side of the outer end portion 55 a of the partition wall portion 55 is disposed. The sub liquid chamber side opening 16 is an opening formed by cutting out a part of the outer peripheral portion of the lower wall portion 54.
The lid 51 is formed with a main liquid chamber side opening (not shown) that is formed at the other end of the restriction passage 13 in the flow path direction and communicates the restriction passage 13 with the main liquid chamber 11. Has been.

上記した防振装置１では、隔壁部５５の外方側の端部５５ａが第一取付部材２の内周面に径方向に密接されるので、隔壁部５５の外方側の端面５５ｂと第一取付部材２の内周面との間がシールされ、隔壁部５５の外方側の端部５５ａにおける径方向のシール性が向上する。これにより、制限通路１３における液体の漏洩を防止することができる。 In the vibration isolator 1 described above, the outer end 55a of the partition wall 55 is in close contact with the inner peripheral surface of the first mounting member 2 in the radial direction. The space between the inner peripheral surface of the mounting member 2 is sealed, and the sealing performance in the radial direction at the outer end 55a of the partition wall 55 is improved. Thereby, the leakage of the liquid in the restriction | limiting channel | path 13 can be prevented.

特に、上記した防振装置１では、隔壁部５５が、平面視において第一取付部材２の内周面に対して斜めに配設され、制限通路１３の流路方向に沿って延設されているため、制限通路１３を流通する液体が隔壁部５５に沿って流通する。このため、隔壁部５５に作用する液体の流圧が小さくなり、隔壁部５５の外方側の端部５５ａにおける液体の漏洩が生じにくくなる。これにより、制限通路１３における液体の漏洩を確実に防止することができる。 In particular, in the vibration isolator 1 described above, the partition wall portion 55 is disposed obliquely with respect to the inner peripheral surface of the first mounting member 2 in a plan view and extends along the flow path direction of the restriction passage 13. Therefore, the liquid flowing through the restriction passage 13 flows along the partition wall portion 55. For this reason, the fluid flow pressure acting on the partition wall 55 is reduced, and the liquid leakage at the outer end 55a of the partition wall 55 is less likely to occur. Thereby, the leakage of the liquid in the restriction | limiting channel | path 13 can be prevented reliably.

さらに、上記した防振装置１では、副液室側開口部１６が、平面視において第一取付部材２の内周面と隔壁部５５とが成す鋭角側部分に配設されているため、隔壁部５５の内周面（平面視における第一取付部材２の内周面に対する鈍角部分側の表面）に液体の流圧が作用するが、隔壁部５５の外周面側（平面視における第一取付部材の内周面に対する鋭角部分側）において副液室側開口部１６から液体が流出するので、隔壁部５５の外周面（鋭角部分側の表面）に作用する液体の流圧は小さくなる。このため、隔壁部５５が平面視における鋭角部分側に向けて押圧され、隔壁部５５の外方側の端部５５ａが第一取付部材２の内周面に密接された状態が維持される。これにより、制限通路１３における液体の漏洩をより確実に防止することができる。 Further, in the vibration isolator 1 described above, the sub liquid chamber side opening 16 is disposed at the acute angle side portion formed by the inner peripheral surface of the first mounting member 2 and the partition wall portion 55 in plan view. The fluid pressure acts on the inner peripheral surface of the portion 55 (surface on the obtuse angle portion side with respect to the inner peripheral surface of the first mounting member 2 in plan view), but the outer peripheral surface side of the partition wall portion 55 (first mounting in plan view) Since the liquid flows out from the sub liquid chamber side opening 16 at the acute angle portion side with respect to the inner peripheral surface of the member, the fluid pressure of the liquid acting on the outer peripheral surface (surface at the acute angle portion side) of the partition wall portion 55 is reduced. For this reason, the partition wall 55 is pressed toward the acute angle portion side in a plan view, and the state in which the outer end 55 a of the partition wall 55 is in close contact with the inner peripheral surface of the first mounting member 2 is maintained. Thereby, the leakage of the liquid in the restriction | limiting channel | path 13 can be prevented more reliably.

また、仕切り部材５の外周面に周溝５９が形成され、その周溝５９の開口部が第一取付部材２の内周面によって閉塞されることで、制限通路１３の外周通路部１４が形成されているため、仕切り部材５を大型化することなく制限通路１３の断面積を大きくすることが可能である。これにより、防振装置１の大型化を抑えつつ、所望の振動減衰性能を実現することができる。また、制限通路１３の外面を画成する外周壁が仕切り部材５から省かれるので、防振装置１を軽量化することができる。 In addition, a circumferential groove 59 is formed on the outer peripheral surface of the partition member 5, and an opening portion of the peripheral groove 59 is blocked by the inner peripheral surface of the first mounting member 2, thereby forming the outer peripheral passage portion 14 of the restriction passage 13. Therefore, the sectional area of the restriction passage 13 can be increased without increasing the size of the partition member 5. Thereby, a desired vibration damping performance can be realized while suppressing an increase in the size of the vibration isolator 1. Moreover, since the outer peripheral wall which defines the outer surface of the restriction | limiting channel | path 13 is excluded from the partition member 5, the vibration isolator 1 can be reduced in weight.

また、上記した防振装置１では、仕切り部材本体５０の外周部に設けられたシール部５８が第一取付部材２の下段差部２３の被覆膜２６にくい込むように密接されており、このシール部５８によって仕切り部材５の外周部と第一取付部材２の下段差部２３との間がシールされているので、仕切り部材５の外周部における軸方向のシール性を向上させることができる。これにより、仕切り部材５の外周部と第一取付部材２の下段差部２３との間から液体が漏洩するのを防止することができる。 Further, in the vibration isolator 1 described above, the seal portion 58 provided on the outer peripheral portion of the partition member main body 50 is in close contact with the covering film 26 of the lower step portion 23 of the first mounting member 2. Since the gap between the outer peripheral portion of the partition member 5 and the lower step portion 23 of the first attachment member 2 is sealed by the seal portion 58, the axial sealing performance at the outer peripheral portion of the partition member 5 can be improved. Thereby, it is possible to prevent liquid from leaking from between the outer peripheral portion of the partition member 5 and the lower step portion 23 of the first mounting member 2.

また、一般に樹脂製の部材と金属製の部材では、成形収縮や使用時の熱収縮量の違いがあるため、仕切り部材５が、樹脂成形品である仕切り部材本体５０にアルミ製の仕切り板５１が取り付けられた構成からなり、その仕切り部材５を金属製の第一取付部材２の内側に嵌合させる場合、隔壁部５５の外方側の端面５５ｂが第一取付部材２の内周面に当たりにくくなるおそれがある。しかしながら、上記した防振装置１では、上記した収縮量のバラつきや製造時の寸法のバラつきを吸収することができる。
また、その際、軸方向のバラつきが起こった場合に、シール部５８を下段差部２３の被覆膜２６にくい込む方向に設置し、軸方向の液体の漏洩を防止することにようにした場合には、隔壁部５５の外方側の端部５５ａの軸方向の寸法のバラつきの影響を受けることなく、液体の漏洩を防止することができる。このように、副液室側開口１６付近における周方向の液体の漏洩を防止すると共に、制限通路１３と副液室１２との間における軸方向の液体の漏洩を防止することができる。 In general, a resin member and a metal member have a difference in molding shrinkage and heat shrinkage during use. Therefore, the partition member 5 is attached to the partition member main body 50, which is a resin molded product, in an aluminum partition plate 51. When the partition member 5 is fitted inside the metal first mounting member 2, the outer end surface 55 b of the partition wall portion 55 hits the inner peripheral surface of the first mounting member 2. May be difficult. However, the above-described vibration isolator 1 can absorb the variation in the shrinkage amount and the variation in the dimensions at the time of manufacture.
In this case, when the axial variation occurs, the seal portion 58 is installed in the direction in which the coating film 26 of the lower step portion 23 is inserted to prevent the liquid leakage in the axial direction. The liquid leakage can be prevented without being affected by the variation in the axial dimension of the outer end 55a of the partition wall 55. In this way, leakage of liquid in the circumferential direction in the vicinity of the auxiliary liquid chamber side opening 16 can be prevented, and leakage of liquid in the axial direction between the restriction passage 13 and the auxiliary liquid chamber 12 can be prevented.

以上、本発明に係る防振装置の実施の形態について説明したが、本発明は上記した実施の形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、図５に示すように、隔壁部５５の外方側の端面５５ｂに全高に亘って延在するシール部５５ｃが突設されていてもよい。これにより、隔壁部５５の外方側の端部５５ａにおける径方向のシール性を更に向上させることができる。
また、上記した実施の形態では、隔壁部５５の外方側の端部５５ａが、仕切り部材５の外周面よりも径方向外方側に突出され、第一取付部材２の内周面に密接されているが、本発明はこれに限定されず、隔壁部５５の外方側の端面５５ａと仕切り部材５の外周面とが面一にすることも可能である。 As mentioned above, although the embodiment of the vibration isolator according to the present invention has been described, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof.
For example, as shown in FIG. 5, a seal portion 55 c that extends over the entire height may be provided on the outer end surface 55 b of the partition wall portion 55. Thereby, the sealing performance of the radial direction in the edge part 55a of the outer side of the partition part 55 can further be improved.
Further, in the above-described embodiment, the outer end portion 55 a of the partition wall portion 55 protrudes radially outward from the outer peripheral surface of the partition member 5 and closely contacts the inner peripheral surface of the first mounting member 2. However, the present invention is not limited to this, and the outer end surface 55a of the partition wall 55 and the outer peripheral surface of the partition member 5 can be flush with each other.

また、図６に示すように、下段差部２３の被覆膜２６に密接するシール部５８の下面に、シール部５８の長さ方向に延在する凸部５８ａが突設されていてもよい。これにより、仕切り部材５の外周部における軸方向のシール性を更に向上させることができる。なお、シール部５８の下面に凹部を形成してもよい。 Further, as shown in FIG. 6, a convex portion 58 a extending in the length direction of the seal portion 58 may protrude from the lower surface of the seal portion 58 in close contact with the coating film 26 of the lower step portion 23. . Thereby, the sealing performance of the axial direction in the outer peripheral part of the partition member 5 can further be improved. A concave portion may be formed on the lower surface of the seal portion 58.

また、上記した実施の形態では、仕切り部材５（仕切り部材本体５０）の外周部に凸状のシール部５８が形成されているが、本発明は、仕切り部材５の外周部の下面（係止面）に、仕切り部材５の外周部と下段差部２３（係止部）との間をシールする凹状のシール部（例えば図２に示す凹溝状のシール部７１のような形状）が形成されていてもよい。また、本発明は、下段差部２３（係止部）の上面（係止面）にシール部が形成されていてもよく、或いは、仕切り部材５の外周部の下面（係止面）及び下段差部２３（係止部）の上面（係止面）にそれぞれシール部が形成されていてもよい。 In the embodiment described above, the convex seal portion 58 is formed on the outer peripheral portion of the partition member 5 (the partition member main body 50). A concave seal portion (for example, a shape like a concave groove-shaped seal portion 71 shown in FIG. 2) is formed on the surface) to seal between the outer peripheral portion of the partition member 5 and the lower step portion 23 (locking portion). May be. In the present invention, a seal portion may be formed on the upper surface (locking surface) of the lower step portion 23 (locking portion), or the lower surface (locking surface) of the outer peripheral portion of the partition member 5 and the lower portion. A seal portion may be formed on each upper surface (locking surface) of the step portion 23 (locking portion).

また、上記した実施の形態では、隔壁部５５が、平面視において第一取付部材２の内周面に対して斜めに配設されて制限通路１３の流路方向に沿って延設されており、平面視において第一取付部材２の内周面と隔壁部５５とが成す鋭角側部分に副液室側開口部１６が配設されているが、本発明は、前記した鋭角側部分に、制限通路１３の端部に配設されて主液室１１に向けて開口された主液室側開口部が配設されていてもよい。なお、本発明は、主液室側開口や副液室側開口が前記した鋭角側部分以外の箇所に配設された構成にすることも可能である。また、本発明は、隔壁部５５が第一取付部材２の内周面に対して斜めに配設されていない構成にすることも可能であり、例えば、隔壁部が第一取付部材２の内周面に対して垂直に配設されていてもよい。 In the above-described embodiment, the partition wall portion 55 is disposed obliquely with respect to the inner peripheral surface of the first mounting member 2 in plan view and extends along the flow path direction of the restriction passage 13. The sub liquid chamber side opening 16 is disposed in the acute angle side portion formed by the inner peripheral surface of the first mounting member 2 and the partition wall portion 55 in a plan view. A main liquid chamber side opening that is disposed at the end of the restriction passage 13 and opens toward the main liquid chamber 11 may be disposed. In the present invention, the main liquid chamber side opening and the sub liquid chamber side opening may be arranged at locations other than the acute angle side portion described above. In addition, the present invention may be configured such that the partition wall portion 55 is not disposed obliquely with respect to the inner peripheral surface of the first mounting member 2. You may arrange | position perpendicular | vertical with respect to a surrounding surface.

また、上記した実施の形態では、制限通路１３が外周通路部１４と内周通路部１５とから構成されており、制限通路１３のうちの一部分（外周通路部１４）が、仕切り部材５の外周面に形成された周溝５９とその周溝５９の開口部を閉塞する第一取付部材２の内周面とによって形成されているが、本発明は、制限通路の全部が、上記した周溝５９と第一取付部材２の内周面とによって形成されていてもよい。例えば、仕切り部材５の外周面の全周に亘って周溝が形成され、その一箇所が隔壁部で閉塞されており、また、隔壁部の一方の表面側に主液室側開口部が形成され、隔壁部の他方の表面側に副液室側開口部が形成された構成であってもよい。 In the above-described embodiment, the restriction passage 13 includes the outer peripheral passage portion 14 and the inner peripheral passage portion 15, and a part of the restriction passage 13 (outer peripheral passage portion 14) is the outer periphery of the partition member 5. The circumferential groove 59 formed on the surface and the inner circumferential surface of the first mounting member 2 that closes the opening of the circumferential groove 59 are formed. 59 and the inner peripheral surface of the first mounting member 2 may be formed. For example, a circumferential groove is formed over the entire circumference of the outer peripheral surface of the partition member 5, and one portion thereof is closed by a partition wall, and a main liquid chamber side opening is formed on one surface side of the partition wall. In addition, the sub liquid chamber side opening may be formed on the other surface side of the partition wall.

また、上記した実施の形態では、仕切り部材本体５０、蓋体５１及び可動板５２からなる仕切り部材５が備えられているが、本発明は、他の構成の仕切り部材であってもよく、例えば上記した可動板５２に代えてメンブランを張設した仕切り部材であってもよく、或いは、外周面に凹状の周溝が形成された仕切り部材本体を備える仕切り部材であってもよい。 In the above-described embodiment, the partition member 5 including the partition member main body 50, the lid body 51, and the movable plate 52 is provided. However, the present invention may be a partition member having another configuration, for example, Instead of the movable plate 52 described above, a partition member in which a membrane is stretched may be used, or a partition member including a partition member body in which a concave circumferential groove is formed on the outer peripheral surface may be used.

また、上記した実施の形態では、支持荷重が作用することで主液室１１に正圧が作用する圧縮式の防振装置１について説明したが、主液室１１が鉛直方向下側に位置しかつ副液室１２が鉛直方向上側に位置するように取り付けられ、支持荷重が作用することで主液室１１に負圧が作用する吊り下げ式の防振装置にも適用可能である。 In the above-described embodiment, the compression type vibration isolator 1 in which a positive pressure is applied to the main liquid chamber 11 when a support load is applied has been described. However, the main liquid chamber 11 is located on the lower side in the vertical direction. And it is applicable also to the suspension type vibration isolator which is attached so that the auxiliary | assistant liquid chamber 12 may be located in the vertical direction upper side, and a negative pressure acts on the main liquid chamber 11 by a support load acting.

また、上記した実施の形態では、第一取付部材２が車体（振動受部）に連結され、第二取付部材３がエンジン（振動発生部）に連結されているが、本発明は、第一取付部材２がエンジン（振動発生部）に連結され、第二取付部材３が車体（振動受部）に連結されてもよい。 In the above-described embodiment, the first mounting member 2 is connected to the vehicle body (vibration receiving portion), and the second mounting member 3 is connected to the engine (vibration generating portion). The attachment member 2 may be connected to the engine (vibration generating portion), and the second attachment member 3 may be connected to the vehicle body (vibration receiving portion).

また、本発明に係る防振装置は、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防振装置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。 Further, the vibration isolator according to the present invention is not limited to the engine mount of the vehicle, but can be applied to the vibration isolator 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、本発明の主旨を逸脱しない範囲で、上記した実施の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、上記した変形例を適宜組み合わせてもよい。 In addition, in the range which does not deviate from the main point of this invention, it is possible to replace suitably the component in above-mentioned embodiment with a well-known component, and you may combine the above-mentioned modification suitably.

１防振装置
２第一取付部材
３第二取付部材
４弾性体
５仕切り部材
１０液室
１１主液室
１２副液室
１３制限通路
１６副液室側開口部
２３下段差部（係止部）
５５隔壁部
５８シール部
５９周溝 DESCRIPTION OF SYMBOLS 1 Vibration isolator 2 1st attachment member 3 2nd attachment member 4 Elastic body 5 Partition member 10 Liquid chamber 11 Main liquid chamber 12 Sub liquid chamber 13 Restriction channel 16 Sub liquid chamber side opening part 23 Lower step part (locking part)
55 Bulkhead part 58 Sealing part 59 Circumferential groove

Claims

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第一取付部材、および他方に連結される第二取付部材と、
前記第一取付部材及び前記第二取付部材を弾性的に連結する弾性体と、
前記第一取付部材の内側に嵌め込まれ、前記第一取付部材の内側に形成された液室を、前記弾性体を壁面の一部とする軸方向一方側の主液室と軸方向他方側の副液室とに区画する仕切り部材と、を備えていると共に、
前記主液室と前記副液室とを連通すると共に前記液室内の液体が流通することで液柱共振を生じさせる制限通路が形成された液体封入型の防振装置であって、
前記制限通路の少なくとも一部は、前記仕切り部材の外周面に形成された周溝と該周溝の開口部を閉塞する第一取付部材の内周面とによって形成されており、
前記第一取付部材に、前記仕切り部材の外周部を軸方向から係止する係止部が設けられ、
該係止部及び前記仕切り部材の外周部のうちの少なくとも一方の係止面に、前記仕切り部材の外周部と前記係止部との間をシールする凹状又は凸状のシール部が形成され、
前記隔壁部が、平面視において前記第一取付部材の内周面に対して斜めに配設され、前記制限通路の流路方向に沿って延設されていることを特徴とする防振装置。 A cylindrical first mounting member coupled to one of the vibration generating unit and the vibration receiving unit, and a second mounting member coupled to the other;
An elastic body that elastically connects the first mounting member and the second mounting member;
The liquid chamber fitted inside the first mounting member and formed inside the first mounting member is divided into a main liquid chamber on one axial side and a second axial side with the elastic body as a part of the wall surface. A partition member that divides into a secondary liquid chamber,
A liquid-filled vibration isolator in which a restriction passage that causes liquid column resonance is generated by allowing the liquid in the liquid chamber to flow while the main liquid chamber and the sub liquid chamber communicate with each other,
At least a part of the restriction passage is formed by a circumferential groove formed on the outer circumferential surface of the partition member and an inner circumferential surface of the first mounting member that closes the opening of the circumferential groove,
The first mounting member is provided with a locking portion that locks the outer peripheral portion of the partition member from the axial direction.
A concave or convex seal portion that seals between the outer peripheral portion of the partition member and the engaging portion is formed on at least one engaging surface of the engaging portion and the outer peripheral portion of the partition member ,
The vibration isolator , wherein the partition wall portion is disposed obliquely with respect to the inner peripheral surface of the first mounting member in plan view and extends along the flow path direction of the restriction passage .

請求項１に記載の防振装置において、
前記仕切り部材の外形が、平面視において楕円形状又は長方円形状となっていることを特徴とする防振装置。 The vibration isolator according to claim 1,
A vibration isolator, wherein an outer shape of the partition member is an elliptical shape or a rectangular shape in a plan view.

請求項１又は２に記載の防振装置において、
前記仕切り部材には、平面視において該仕切り部材の内方側から該仕切り部材の外方側に向かって延在して前記制限通路を画成する隔壁部が設けられ、
該隔壁部の外方側の端部が、前記仕切り部材の外周面よりも径方向外方側に突出され、前記第一取付部材の内周面に密接されていることを特徴とする防振装置。 In the vibration isolator according to claim 1 or 2,
The partition member is provided with a partition portion that extends from the inner side of the partition member toward the outer side of the partition member in plan view and defines the restriction passage,
An end of the partition wall on the outer side protrudes radially outward from the outer peripheral surface of the partition member, and is in close contact with the inner peripheral surface of the first mounting member. apparatus.

請求項１から３の何れか一項に記載の防振装置において、
前記制限通路の流路方向の一端部に配設されて前記主液室に向けて開口された主液室側開口部、又は、前記制限通路の流路方向の他端部に配設されて前記副液室に向けて開口された副液室側開口部が、平面視において前記第一取付部材の内周面と前記隔壁部とが成す鋭角側部分に配設されていることを特徴とする防振装置。 In the vibration isolator as described in any one of Claim 1 to 3 ,
A main liquid chamber side opening disposed at one end of the restriction passage in the flow path direction and opened toward the main liquid chamber, or disposed at the other end of the restriction passage in the flow path direction. The secondary liquid chamber side opening opened toward the secondary liquid chamber is disposed in an acute angle side portion formed by the inner peripheral surface of the first mounting member and the partition wall in a plan view. Anti-vibration device.