JP7444801B2 - Vibration isolator - Google Patents

Vibration isolator Download PDF

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JP7444801B2
JP7444801B2 JP2021012442A JP2021012442A JP7444801B2 JP 7444801 B2 JP7444801 B2 JP 7444801B2 JP 2021012442 A JP2021012442 A JP 2021012442A JP 2021012442 A JP2021012442 A JP 2021012442A JP 7444801 B2 JP7444801 B2 JP 7444801B2
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liquid chamber
mounting member
vibration isolator
inner diameter
main liquid
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JP2022115712A (en
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勇樹 佐竹
竹史 岡田
宏則 渋谷
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Prospira Corp
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Description

本発明は、防振装置に関するものである。 The present invention relates to a vibration isolator.

従来から、振動発生部および振動受部のうちのいずれか一方に取付けられる筒状の第１取付部材、および他方に取付けられる第２取付部材と、第１取付部材および第２取付部材を互いに連結した本体ゴムと、液体が封入された第１取付部材内の液室を、本体ゴムを隔壁の一部に有する主液室および副液室に、第１取付部材の中心軸線に沿う軸方向に仕切る仕切部材と、を備え、仕切部材に、主液室と副液室とを連通する制限通路が設けられ、本体ゴムに、主液室とこの防振装置の外部とを連通する注入孔が形成され、注入孔に封止材が嵌合された防振装置が知られている。 Conventionally, a cylindrical first mounting member attached to either one of a vibration generating section and a vibration receiving section, and a second mounting member attached to the other, and the first mounting member and the second mounting member are connected to each other. The main body rubber and the liquid chamber in the first mounting member filled with liquid are connected to a main liquid chamber and a sub-liquid chamber having the main body rubber as part of the partition wall in an axial direction along the central axis of the first mounting member. A partition member is provided, the partition member is provided with a restriction passage that communicates the main liquid chamber and the auxiliary liquid chamber, and the main liquid chamber is provided with an injection hole that communicates the main liquid chamber with the outside of the vibration isolator. A vibration isolator is known in which a sealing material is fitted into an injection hole.

特開２０１５－１４０８７１号公報Japanese Patent Application Publication No. 2015-140871

しかしながら、前記従来の防振装置では、主液室の内圧が上昇したときに、封止材が主液室の反対側に向けて位置ずれするおそれがあった。
なお、主液室には、正圧だけでなく負圧も生ずるが、正圧の絶対値が、負圧の絶対値より圧倒的に大きくなり得る。 However, in the conventional vibration isolator, when the internal pressure of the main liquid chamber increases, there is a risk that the sealing material will be displaced toward the opposite side of the main liquid chamber.
Note that not only positive pressure but also negative pressure is generated in the main liquid chamber, but the absolute value of the positive pressure can be overwhelmingly larger than the absolute value of the negative pressure.

この発明は、このような事情を考慮してなされたもので、主液室の内圧が上昇したときに、封止材が主液室の反対側に向けて位置ずれするのを抑制することができる防振装置を提供することを目的とする。 This invention was made in consideration of the above circumstances, and it is possible to suppress the sealing material from shifting toward the opposite side of the main liquid chamber when the internal pressure of the main liquid chamber increases. The purpose is to provide a vibration isolating device that can

上記課題を解決して、このような目的を達成するために、本発明の防振装置は、振動発生部および振動受部のうちのいずれか一方に取付けられる筒状の第１取付部材、および他方に取付けられる第２取付部材と、前記第１取付部材および前記第２取付部材を互いに連結した本体ゴムと、液体が封入された前記第１取付部材内の液室を、前記本体ゴムを隔壁の一部に有する主液室および副液室に、前記第１取付部材の中心軸線に沿う軸方向に仕切る仕切部材と、を備え、前記仕切部材に、前記主液室と前記副液室とを連通する制限通路が設けられ、前記本体ゴムに、前記主液室とこの防振装置の外部とを連通する注入孔が形成され、前記注入孔は、前記主液室に向けて開口する内側部分と、この防振装置の外部に向けて開口する外側部分と、前記内側部分と前記外側部分との間に位置する中間部分と、を備え、前記中間部分に封止材が嵌合され、前記内側部分の内径は、前記外側部分の内径より大きく、かつ前記中間部分の内径以下となっている。 In order to solve the above problems and achieve such an object, the vibration isolator of the present invention includes a cylindrical first mounting member that is attached to either one of the vibration generating section and the vibration receiving section; A second mounting member attached to the other, a rubber body connecting the first mounting member and the second mounting member to each other, a liquid chamber in the first mounting member filled with liquid, and a partition between the rubber body and the second mounting member. a main liquid chamber and a sub-liquid chamber provided in a part of the main liquid chamber and a partition member that partitions the main liquid chamber and the sub-liquid chamber in an axial direction along the central axis of the first mounting member; an injection hole communicating between the main liquid chamber and the outside of the vibration isolator is formed in the main body rubber, and the injection hole has an inner side opening toward the main liquid chamber; a portion, an outer portion opening toward the outside of the vibration isolator, and an intermediate portion located between the inner portion and the outer portion, a sealing material being fitted into the intermediate portion, The inner diameter of the inner portion is larger than the inner diameter of the outer portion and less than or equal to the inner diameter of the intermediate portion.

この発明によれば、注入孔において、外側部分の内径が、内側部分の内径より小さくなっているので、内側部分および外側部分の各内径が、互いに同じになっている場合と比べて、中間部分を外側部分に対して大きく張り出させやすくすることが可能になり、外側部分と中間部分との間の段部と、封止材と、の接触面積を広く確保することができる。これにより、主液室の正圧が内側部分を通して封止材に加えられたときに、封止材を段部に支持させることで、封止材が、外側部分側に位置ずれするのを抑制することができる。
注入孔において、中間部分の内径が、外側部分の内径より大きく、かつ内側部分の内径以上となっているので、液体が、内側部分から外側部分に漏出するのを確実に抑えることができる。 According to this invention, in the injection hole, since the inner diameter of the outer part is smaller than the inner diameter of the inner part, the middle part has a smaller inner diameter than the inner diameter of the inner part and the outer part. It becomes possible to make it easier to make the sealing member protrude largely from the outer portion, and it is possible to secure a wide contact area between the step portion between the outer portion and the intermediate portion and the sealing material. As a result, when positive pressure in the main liquid chamber is applied to the sealing material through the inner part, the sealing material is supported by the stepped part, thereby suppressing the sealing material from shifting toward the outer part. can do.
In the injection hole, since the inner diameter of the intermediate portion is larger than the inner diameter of the outer portion and greater than or equal to the inner diameter of the inner portion, leakage of liquid from the inner portion to the outer portion can be reliably suppressed.

前記内側部分の長さは、前記外側部分の長さより短くなってもよい。 The length of the inner portion may be shorter than the length of the outer portion.

この場合、外側部分より内径が大きい内側部分の長さが、外側部分の長さより短くなっているので、加硫成形した本体ゴムの脱型時に、注入孔を成形した成形ピンを、外側部分から内側部分に向かう向きに容易に抜き出すことができる。 In this case, the length of the inner part, which has a larger inner diameter than the outer part, is shorter than the length of the outer part, so when removing the vulcanized body rubber from the mold, the molded pin with the injection hole is removed from the outer part. It can be easily pulled out in the direction toward the inner part.

この発明によれば、主液室の内圧が上昇したときに、封止材が主液室の反対側に向けて位置ずれするのを抑制することができる。 According to this invention, when the internal pressure of the main liquid chamber increases, it is possible to suppress the sealing material from shifting toward the opposite side of the main liquid chamber.

本発明に係る一実施形態として示した防振装置の縦断面図である。1 is a longitudinal cross-sectional view of a vibration isolator shown as an embodiment of the present invention.

以下、本発明に係る防振装置の一実施形態を、図１を参照しながら説明する。
この防振装置１は、振動発生部および振動受部のうちのいずれか一方に取付けられる筒状の第１取付部材１１、および他方に取付けられる第２取付部材１２と、第１取付部材１１および第２取付部材１２を互いに連結した本体ゴム１３と、液体が封入された第１取付部材１１内の液室１６を、本体ゴム１３を隔壁の一部に有する主液室１６ａおよび副液室１６ｂに仕切る仕切部材１５と、を備えている。 Hereinafter, one embodiment of a vibration isolator according to the present invention will be described with reference to FIG.
This vibration isolator 1 includes a cylindrical first mounting member 11 attached to either one of a vibration generating section and a vibration receiving section, a second mounting member 12 attached to the other, the first mounting member 11, and the second mounting member 12 attached to the other. A main liquid chamber 16a and a sub-liquid chamber 16b having the main body rubber 13 as a part of the partition wall include a main body rubber 13 that connects the second mounting member 12 to each other, and a liquid chamber 16 in the first mounting member 11 filled with liquid. and a partition member 15 for partitioning into.

液室１６に封入された液体としては、例えばエチレングリコール、水、シリコーンオイル等が挙げられる。
防振装置１は、例えば自動車等に装着され、エンジンの振動が車体に伝達するのを抑える。防振装置１では、第２取付部材１２が振動発生部としての図示されないエンジンに取付けられ、第１取付部材１１が図示されないブラケットを介して振動受部としての車体に取付けられる。なお、第１取付部材１１が振動発生部に、第２取付部材１２が振動受部にそれぞれ取付けられてもよい。 Examples of the liquid sealed in the liquid chamber 16 include ethylene glycol, water, and silicone oil.
The vibration isolator 1 is attached to, for example, an automobile, and suppresses engine vibrations from being transmitted to the vehicle body. In the vibration isolator 1, the second mounting member 12 is attached to an engine (not shown) as a vibration generating section, and the first mounting member 11 is attached to a vehicle body as a vibration receiving section via a bracket (not shown). Note that the first attachment member 11 may be attached to the vibration generating section, and the second attachment member 12 may be attached to the vibration receiving section.

筒状の第１取付部材１１は、中心軸線Ｏと同軸に配設され、液室１６は、第１取付部材１１の内側に設けられ、仕切部材１５は、液室１６を、中心軸線Ｏに沿う軸方向に仕切っている。
以下、軸方向に沿って主液室１６ａ側を上側といい、副液室１６ｂ側を下側という。軸方向から見て、中心軸線Ｏに交差する方向を径方向といい、中心軸線Ｏ回りに周回する方向を周方向という。 The cylindrical first mounting member 11 is disposed coaxially with the central axis O, the liquid chamber 16 is provided inside the first mounting member 11, and the partition member 15 connects the liquid chamber 16 to the central axis O. It is partitioned along the axis.
Hereinafter, the main liquid chamber 16a side along the axial direction will be referred to as the upper side, and the sub liquid chamber 16b side will be referred to as the lower side. When viewed from the axial direction, the direction that intersects the central axis O is called the radial direction, and the direction that goes around the central axis O is called the circumferential direction.

第１取付部材１１は、第１筒部１１ａと、第１筒部１１ａの下方に位置する第２筒部１１ｂと、第１筒部１１ａと第２筒部１１ｂとを連結する段部１１ｃと、を備えている。第１筒部１１ａ、第２筒部１１ｂおよび段部１１ｃは、中心軸線Ｏと同軸に配設されて一体に形成されている。第１筒部１１ａの直径は、第２筒部１１ｂの直径より大きくなっている。第１取付部材１１の上端開口部が、本体ゴム１３により液密に閉塞され、第１取付部材１１の下端開口部が、ダイヤフラム１４により液密に閉塞されることにより、第１取付部材１１の内側に液体が封入されている。ダイヤフラム１４は、副液室１６ｂの隔壁の一部を構成している。
第２取付部材１２は、第１筒部１１ａよりも上方に配置されている。第２取付部材１２は、径方向のうちの一方向に延びる装着筒１２ａを有している。 The first mounting member 11 includes a first cylindrical portion 11a, a second cylindrical portion 11b located below the first cylindrical portion 11a, and a stepped portion 11c connecting the first cylindrical portion 11a and the second cylindrical portion 11b. , is equipped with. The first cylindrical portion 11a, the second cylindrical portion 11b, and the stepped portion 11c are disposed coaxially with the central axis O and are integrally formed. The diameter of the first cylindrical portion 11a is larger than the diameter of the second cylindrical portion 11b. The upper end opening of the first mounting member 11 is fluid-tightly closed by the main body rubber 13, and the lower end opening of the first mounting member 11 is fluid-tightly closed by the diaphragm 14. Liquid is sealed inside. The diaphragm 14 constitutes a part of the partition wall of the sub-liquid chamber 16b.
The second mounting member 12 is arranged above the first cylindrical portion 11a. The second mounting member 12 has a mounting cylinder 12a extending in one of the radial directions.

本体ゴム１３は、第１取付部材１１の上端部から上方に突出し、かつ上方に向かうに従い径方向の内側に向けて延びる円錐台状に形成された本体部１３ａと、径方向のうちの一方向に延び、かつ第２取付部材１２の少なくとも一部が連結された筒部１３ｂと、を備えている。筒部１３ｂは、第２取付部材１２の装着筒１２ａを全周にわたって覆っている。
第１取付部材１１の内周面は、全域にわたって被覆ゴム１３ｃに覆われている。被覆ゴム１３ｃは、本体ゴム１３と一体に形成されている。 The main body rubber 13 includes a main body portion 13a formed in a truncated conical shape that projects upward from the upper end of the first mounting member 11 and extends radially inward as it goes upward, and and a cylindrical portion 13b extending to and to which at least a portion of the second mounting member 12 is connected. The cylinder portion 13b covers the entire circumference of the mounting cylinder 12a of the second mounting member 12.
The entire inner peripheral surface of the first mounting member 11 is covered with a covering rubber 13c. The covering rubber 13c is formed integrally with the main rubber 13.

仕切部材１５は、例えばアルミニウム合金若しくは合成樹脂材料等により形成されている。仕切部材１５は、円盤状に形成され、第１取付部材１１内に嵌合されている。仕切部材１５の上面は、本体ゴム１３に直接、軸方向で対向しており、仕切部材１５は主液室１６ａの隔壁の一部を構成している。仕切部材１５の下面は、ダイヤフラム１４に直接、軸方向で対向しており、仕切部材１５は副液室１６ｂの隔壁の一部を構成している。 The partition member 15 is made of, for example, an aluminum alloy or a synthetic resin material. The partition member 15 is formed into a disk shape and is fitted into the first mounting member 11 . The upper surface of the partition member 15 directly faces the main body rubber 13 in the axial direction, and the partition member 15 constitutes a part of the partition wall of the main liquid chamber 16a. The lower surface of the partition member 15 directly faces the diaphragm 14 in the axial direction, and the partition member 15 constitutes a part of the partition wall of the sub-liquid chamber 16b.

仕切部材１５には、主液室１６ａと副液室１６ｂとを連通する制限通路１８が設けられている。制限通路１８は、仕切部材１５の外周面に形成され周方向に延びている。制限通路１８は、例えば周波数が１０Ｈｚ前後のエンジンシェイク振動の入力時に共振（液柱共振）が発生するようにチューニングされてもよい。制限通路１８は、軸方向に延びてもよい。 The partition member 15 is provided with a restriction passage 18 that communicates the main liquid chamber 16a and the auxiliary liquid chamber 16b. The restriction passage 18 is formed on the outer peripheral surface of the partition member 15 and extends in the circumferential direction. The restriction passage 18 may be tuned so that resonance (liquid column resonance) occurs when engine shake vibration with a frequency of about 10 Hz is input, for example. Restriction passage 18 may extend in the axial direction.

そして本実施形態では、本体ゴム１３に、主液室１６ａとこの防振装置１の外部とを連通する注入孔２０が形成されている。注入孔２０を通して、液室１６に液体が注入される。
注入孔２０は、中心軸線Ｏと同軸に配設されている。注入孔２０は、中心軸線Ｏに直交する横断面視で円形状を呈する。なお、注入孔２０は、中心軸線Ｏから離れた位置に設けられてもよく、軸方向に交差する方向に延びてもよい。 In this embodiment, an injection hole 20 is formed in the main body rubber 13 to communicate the main liquid chamber 16a with the outside of the vibration isolator 1. Liquid is injected into the liquid chamber 16 through the injection hole 20 .
The injection hole 20 is arranged coaxially with the central axis O. The injection hole 20 has a circular shape when viewed in a cross section perpendicular to the central axis O. Note that the injection hole 20 may be provided at a position away from the central axis O, or may extend in a direction intersecting the axial direction.

注入孔２０は、主液室１６ａに向けて開口する内側部分２１と、この防振装置１の外部に向けて開口する外側部分２２と、内側部分２１と外側部分２２との間に位置する中間部分２３と、を備えている。 The injection hole 20 has an inner portion 21 that opens toward the main liquid chamber 16a, an outer portion 22 that opens toward the outside of the vibration isolator 1, and an intermediate portion located between the inner portion 21 and the outer portion 22. A portion 23 is provided.

内側部分２１および外側部分２２は、軸方向に真直ぐ延びている。内側部分２１の長さは、外側部分２２の長さより短くなっている。
外側部分２２は、本体ゴム１３の筒部１３ｂの内周面に開口している。外側部分２２は、筒部１３ｂの内側を通してこの防振装置１の外部に向けて開口している。
中間部分２３に封止材２４が嵌合されている。封止材２４は、例えば金属材料若しくは合成樹脂材料等により形成されている。中間部分２３および封止材２４は、球形状となっている。封止材２４の外径（例えば約８ｍｍ）は、中間部分２３の内径（例えば約６．５ｍｍ）よりわずかに大きくなっている。中間部分２３および封止材２４は、中心軸線Ｏと同軸に配設されている。 The inner portion 21 and the outer portion 22 extend straight in the axial direction. The length of the inner portion 21 is shorter than the length of the outer portion 22.
The outer portion 22 is open to the inner peripheral surface of the cylindrical portion 13b of the rubber body 13. The outer portion 22 is open to the outside of the vibration isolator 1 through the inside of the cylindrical portion 13b.
A sealing material 24 is fitted into the intermediate portion 23 . The sealing material 24 is made of, for example, a metal material or a synthetic resin material. The intermediate portion 23 and the sealing material 24 have a spherical shape. The outer diameter of the sealant 24 (for example, about 8 mm) is slightly larger than the inner diameter of the intermediate portion 23 (for example, about 6.5 mm). The intermediate portion 23 and the sealing material 24 are arranged coaxially with the central axis O.

内側部分２１の内径（例えば約５ｍｍ）は、外側部分２２の内径（例えば約３ｍｍ）より大きく、かつ中間部分２３の内径以下となっている。図示の例では、中間部分２３の内径が、注入孔２０のなかで最大となっている。外側部分２２と中間部分２３との間の段部２５の径方向の大きさが、内側部分２１と中間部分２３との間の段部２６の径方向の大きさより大きくなっている。前者の段部２５は、後者の段部２６より径方向の内側に張り出している。 The inner diameter of the inner portion 21 (for example, approximately 5 mm) is larger than the inner diameter of the outer portion 22 (for example, approximately 3 mm), and is less than or equal to the inner diameter of the intermediate portion 23 . In the illustrated example, the inner diameter of the intermediate portion 23 is the largest among the injection holes 20. The radial size of the stepped portion 25 between the outer portion 22 and the intermediate portion 23 is larger than the radial size of the stepped portion 26 between the inner portion 21 and the intermediate portion 23. The former step portion 25 projects more radially inward than the latter step portion 26.

以上説明したように、本実施形態による防振装置１によれば、注入孔２０において、外側部分２２の内径が、内側部分２１の内径より小さくなっているので、内側部分２１および外側部分２２の各内径が、互いに同じになっている場合と比べて、中間部分２３を外側部分２２に対して径方向の外側に大きく張り出させやすくすることが可能になり、外側部分２２と中間部分２３との間の段部２５と、封止材２４と、の接触面積を広く確保することができる。これにより、主液室１６ａの正圧が内側部分２１を通して封止材２４に加えられたときに、封止材２４を段部２５に支持させることで、封止材２４が、外側部分２２側に位置ずれするのを抑制することができる。
注入孔２０において、中間部分２３の内径が、外側部分２２の内径より大きく、かつ内側部分２１の内径以上となっているので、液体が、内側部分２１から外側部分２２に漏出するのを確実に抑えることができる。 As explained above, according to the vibration isolator 1 according to the present embodiment, in the injection hole 20, the inner diameter of the outer part 22 is smaller than the inner diameter of the inner part 21. Compared to the case where each inner diameter is the same, it is possible to make it easier for the intermediate portion 23 to protrude outward in the radial direction with respect to the outer portion 22, and the outer portion 22 and the intermediate portion 23 are A wide contact area between the stepped portion 25 and the sealing material 24 can be ensured. As a result, when the positive pressure of the main liquid chamber 16a is applied to the sealing material 24 through the inner part 21, the sealing material 24 is supported by the step part 25, so that the sealing material 24 is moved toward the outer part 22 side. It is possible to suppress misalignment.
In the injection hole 20, the inner diameter of the intermediate portion 23 is larger than the inner diameter of the outer portion 22 and is greater than or equal to the inner diameter of the inner portion 21, thereby ensuring that liquid leaks from the inner portion 21 to the outer portion 22. It can be suppressed.

外側部分２２より内径が大きい内側部分２１の長さが、外側部分２２の長さより短くなっているので、加硫成形した本体ゴム１３の脱型時に、注入孔２０を成形した成形ピンを、外側部分２２から内側部分２１に向かう向きに容易に抜き出すことができる。 Since the length of the inner part 21, which has an inner diameter larger than that of the outer part 22, is shorter than the length of the outer part 22, when demolding the vulcanized main body rubber 13, the molding pin with the injection hole 20 is inserted into the outer part 22. It can be easily pulled out from the portion 22 toward the inner portion 21.

なお、本発明の技術範囲は、前述した各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。 Note that the technical scope of the present invention is not limited to the embodiments described above, and various changes can be made without departing from the spirit of the present invention.

例えば、前記実施形態では、内側部分２１の長さを、外側部分２２の長さより短くしたが、内側部分２１の長さを、外側部分２２の長さ以上としてもよい。 For example, in the embodiment, the length of the inner portion 21 is shorter than the length of the outer portion 22, but the length of the inner portion 21 may be greater than or equal to the length of the outer portion 22.

前記実施形態では、支持荷重が作用することで主液室１６ａ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１６ａが下側に位置し、かつ副液室１６ｂが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１６ａ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。
また、本発明に係る防振装置１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、車両用のキャビンマウント若しくはブッシュ、または建設機械に搭載された発電機のマウントに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適用することも可能である。 In the embodiment described above, the compression-type vibration isolator 1 has been described in which positive pressure is applied to the main liquid chamber 16a when a supporting load is applied. It is also applicable to a hanging type vibration isolator in which negative pressure is applied to the main liquid chamber 16a when a supporting load is applied to the main liquid chamber 16a.
Furthermore, the vibration isolator 1 according to the present invention is not limited to the engine mount of a vehicle, and can also be applied to other than the engine mount. For example, it can be applied to a cabin mount or bush for a vehicle, a mount for a generator mounted on a construction machine, or a mount for a machine installed in a factory or the like.

その他、本発明の趣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、上記した実施形態および変形例を適宜組み合わせてもよい。 In addition, the components in the embodiments described above can be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the embodiments and modifications described above may be combined as appropriate.

１ 防振装置
１１ 第１取付部材
１２ 第２取付部材
１３ 本体ゴム
１５ 仕切部材
１６ 液室
１６ａ 主液室
１６ｂ 副液室
１８ 制限通路
２０ 注入孔
２１ 内側部分
２２ 外側部分
２３ 中間部分
２４ 封止材
Ｏ 中心軸線 1 Vibration isolator 11 First mounting member 12 Second mounting member 13 Main body rubber 15 Partition member 16 Liquid chamber 16a Main liquid chamber 16b Sub-liquid chamber 18 Restriction passage 20 Injection hole 21 Inner part 22 Outer part 23 Intermediate part 24 Sealing material O center axis

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取付けられる筒状の第１取付部材、および他方に取付けられる第２取付部材と、
前記第１取付部材および前記第２取付部材を互いに連結した本体ゴムと、
液体が封入された前記第１取付部材内の液室を、前記本体ゴムを隔壁の一部に有する主液室および副液室に、前記第１取付部材の中心軸線に沿う軸方向に仕切る仕切部材と、を備え、
前記仕切部材に、前記主液室と前記副液室とを連通する制限通路が設けられ、
前記本体ゴムに、前記主液室とこの防振装置の外部とを連通する注入孔が形成され、
前記注入孔は、
前記主液室に向けて開口する内側部分と、
この防振装置の外部に向けて開口する外側部分と、
前記内側部分と前記外側部分との間に位置する中間部分と、を備え、
前記中間部分に封止材が嵌合され、
前記内側部分の内径は、前記外側部分の内径より大きく、かつ前記中間部分の内径以下となっている、防振装置。 a cylindrical first mounting member attached to either one of the vibration generating section and the vibration receiving section, and a second mounting member attached to the other;
a main body rubber that connects the first mounting member and the second mounting member to each other;
a partition that partitions a liquid chamber in the first mounting member filled with liquid into a main liquid chamber and a sub-liquid chamber having the main body rubber as a part of the partition wall in an axial direction along the central axis of the first mounting member; comprising a member;
The partition member is provided with a restriction passage that communicates the main liquid chamber and the auxiliary liquid chamber,
An injection hole communicating between the main liquid chamber and the outside of the vibration isolator is formed in the main body rubber,
The injection hole is
an inner portion opening toward the main liquid chamber;
an outer portion that opens toward the outside of the vibration isolator;
an intermediate portion located between the inner portion and the outer portion;
A sealing material is fitted to the intermediate portion,
In the vibration isolator, the inner diameter of the inner portion is larger than the inner diameter of the outer portion and smaller than or equal to the inner diameter of the intermediate portion. 前記内側部分の長さは、前記外側部分の長さより短くなっている、請求項１に記載の防振装置。 The vibration isolator according to claim 1, wherein the length of the inner portion is shorter than the length of the outer portion.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008240888A (en) 2007-03-27 2008-10-09 Tokai Rubber Ind Ltd Fluid-filling type vibration-proof device and its manufacturing method
JP2015140871A (en) 2014-01-29 2015-08-03 住友理工株式会社 Vibration isolator with brackets
JP2020029870A (en) 2018-08-20 2020-02-27 大丸鐵興株式会社 Check valve built-in bolt and container having the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008240888A (en) 2007-03-27 2008-10-09 Tokai Rubber Ind Ltd Fluid-filling type vibration-proof device and its manufacturing method
JP2015140871A (en) 2014-01-29 2015-08-03 住友理工株式会社 Vibration isolator with brackets
JP2020029870A (en) 2018-08-20 2020-02-27 大丸鐵興株式会社 Check valve built-in bolt and container having the same

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