JP6836909B2

JP6836909B2 - Anti-vibration device

Info

Publication number: JP6836909B2
Application number: JP2017003040A
Authority: JP
Inventors: 小島　宏; 宏小島
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2017-01-12
Filing date: 2017-01-12
Publication date: 2021-03-03
Anticipated expiration: 2037-01-12
Also published as: JP2018112249A

Description

本発明は、防振装置に関する。 The present invention relates to an anti-vibration device.

従来から、例えば下記特許文献１に示されるような、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側取付部材、および他方に連結されるとともに、外側取付部材の内側に配置された内側取付部材と、外側取付部材と内側取付部材とを連結するとともに、外側取付部材の中心軸線に沿う軸方向に間隔をあけて配置された一対の第１弾性体と、外側取付部材と内側取付部材とを連結するとともに、一対の第１弾性体間の液室を、前記軸方向に複数の液室に仕切る仕切部材と、複数の液室を前記軸方向にさらに区画する第２弾性体と、を備えた防振装置が知られている。 Conventionally, for example, as shown in Patent Document 1 below, a tubular outer mounting member connected to one of a vibration generating portion and a vibration receiving portion, and a tubular outer mounting member connected to the other and an outer mounting member. A pair of first elastic bodies arranged at intervals in the axial direction along the central axis of the outer mounting member while connecting the inner mounting member arranged inside, the outer mounting member, and the inner mounting member, and the outer side. A partition member that connects the mounting member and the inner mounting member and divides the liquid chamber between the pair of first elastic bodies into a plurality of liquid chambers in the axial direction, and further partitions the liquid chambers in the axial direction. A vibration isolator including a second elastic body is known.

特開平８−４８２４号公報Japanese Unexamined Patent Publication No. 8-4824

しかしながら、前記従来の防振装置では、振動の入力時に高ばねになりやすいという問題があった。 However, the conventional vibration isolator has a problem that a high spring tends to occur when vibration is input.

本発明は、前述した事情に鑑みてなされたものであって、高い減衰性能を発揮させつつ、振動の入力時における高ばね化を抑え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-mentioned circumstances, and an object of the present invention is to provide a vibration isolator capable of suppressing a high spring at the time of inputting vibration while exhibiting high damping performance.

前記課題を解決するために、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連結される筒状の外側取付部材、および他方に連結されるとともに、前記外側取付部材の内側に配置された内側取付部材と、前記外側取付部材と前記内側取付部材とを連結するとともに、前記外側取付部材の中心軸線に沿う軸方向に間隔をあけて配置された一対の第１本体ゴムと、前記外側取付部材と前記内側取付部材とを連結するとともに、一対の前記第１本体ゴム間の液室を、前記軸方向に第１液室と第２液室とに仕切る仕切部材と、前記第１液室を、前記第１本体ゴムを隔壁の一部とする第１受圧液室、および前記仕切部材を隔壁の一部とする第２受圧液室に区画する第２本体ゴムと、前記第２液室を、前記第１本体ゴムを隔壁の一部とする第３受圧液室、および前記仕切部材を隔壁の一部とする第４受圧液室に区画する第３本体ゴムと、を備え、前記仕切部材には、前記第３受圧液室および前記第４受圧液室のうちのいずれか一方と、前記第１受圧液室と、を連通する第１制限通路と、前記第３受圧液室および前記第４受圧液室のうちのいずれか他方と、前記第２受圧液室と、を連通する第２制限通路と、が形成され、前記第１制限通路および前記第２制限通路それぞれの流通抵抗が、互いに異なり、前記仕切部材は、前記外側取付部材に連結された環状の外側剛体部と、前記内側取付部材に連結された環状の内側剛体部と、前記外側剛体部と前記内側剛体部とを連結する環状の弾性部と、を備えていることを特徴とする。 In order to solve the above-mentioned problems, the anti-vibration device of the present invention is connected to a tubular outer mounting member connected to one of a vibration generating portion and a vibration receiving portion, and to the other, and is connected to the outer side. A pair of a pair of inner mounting members arranged inside the mounting member, connecting the outer mounting member and the inner mounting member, and arranged at intervals in the axial direction along the central axis of the outer mounting member. 1 A partition that connects the main body rubber, the outer mounting member, and the inner mounting member, and divides the liquid chamber between the pair of the first main body rubbers into a first liquid chamber and a second liquid chamber in the axial direction. A second main body that partitions the member and the first liquid chamber into a first pressure receiving liquid chamber in which the rubber of the first main body is a part of a partition wall, and a second pressure receiving liquid chamber in which the partition member is a part of a partition wall. A third main body that partitions the rubber and the second liquid chamber into a third pressure receiving liquid chamber in which the rubber of the first main body is a part of a partition wall and a fourth pressure receiving liquid chamber in which the partition member is a part of a partition wall. The partition member includes a rubber, and the partition member includes a first limiting passage that communicates with either one of the third pressure receiving liquid chamber and the fourth pressure receiving liquid chamber and the first pressure receiving liquid chamber. A second limiting passage that communicates with any one of the third pressure receiving liquid chamber and the fourth pressure receiving liquid chamber and the second pressure receiving liquid chamber is formed, and the first limiting passage and the first limiting passage are formed. 2 restricted passage each flow resistance is, unlike each other, the partition member includes an outer rigid portion of the annular connected to said outer mounting member, and an inner rigid part of the annular coupled to the inner mounting member, said outer It is characterized by including an annular elastic portion that connects the rigid body portion and the inner rigid body portion.

この発明によれば、振動が入力されると、第１本体ゴム、第２本体ゴム、および第３本体ゴムがそれぞれ弾性変形し、第１液室および第２液室の各液圧が変動しようとする。このとき液体が、第１液室と第２液室との間を第１制限通路および第２制限通路を通して往来し、振動が減衰、吸収される。
そしてこの際、第１制限通路および第２制限通路が連通する４つ全ての液室が、第１〜第３本体ゴムのうちの少なくとも１つを隔壁の一部に有していて、振動の入力に伴い液圧が変動する受圧液室となっているので、振動の入力時における液圧の変動量が大きくなり、高い減衰性能を発揮させることができる。 According to the present invention, when vibration is input, the first main body rubber, the second main body rubber, and the third main body rubber are elastically deformed, and the hydraulic pressures of the first liquid chamber and the second liquid chamber will fluctuate. And. At this time, the liquid moves back and forth between the first liquid chamber and the second liquid chamber through the first limiting passage and the second limiting passage, and the vibration is attenuated and absorbed.
At this time, all four liquid chambers through which the first limiting passage and the second limiting passage communicate have at least one of the first to third main body rubbers as a part of the partition wall, and the vibration is generated. Since the pressure receiving liquid chamber fluctuates with the input, the amount of fluctuation of the liquid pressure at the time of inputting the vibration becomes large, and high damping performance can be exhibited.

また、第１制限通路および第２制限通路それぞれの共振周波数が互いに異なっているので、共振周波数が２つ存在することとなり、第１制限通路および第２制限通路それぞれにおける液柱共振に基づく減衰特性の各ピーク間を平準化させることが可能になり、動ばねが幅広い周波数帯域で低減されることとなり、振動の入力時における高ばね化を抑えることができる。
弾性部が、外側剛体部と内側剛体部とを連結しているので、例えば仕切部材を、外側取付部材および内側取付部材に組み付けるときに、弾性部を変形させることで組み付け易くすることが可能になり、組み付け性を向上させ易くすることができる。 Further, since the resonance frequencies of the first limiting passage and the second limiting passage are different from each other, there are two resonance frequencies, and the damping characteristics based on the liquid column resonance in each of the first limiting passage and the second limiting passage. It becomes possible to level the peaks of the above, reduce the dynamic spring in a wide frequency band, and suppress the increase in spring at the time of inputting vibration.
Since the elastic portion connects the outer rigid body portion and the inner rigid body portion, for example, when assembling the partition member to the outer mounting member and the inner mounting member, it is possible to easily assemble by deforming the elastic portion. Therefore, it is possible to easily improve the assembling property.

また、前記第１制限通路は、前記第１受圧液室と前記第３受圧液室とを連通し、前記第２制限通路は、前記第２受圧液室と前記第４受圧液室とを連通してもよい。
この場合には、前記軸方向の外側に位置する第１受圧液室と第３受圧液室とが第１制限通路を通して互いに連通し、前記軸方向の内側に位置する第２受圧液室と第４受圧液室とが第２制限通路を通して互いに連通することとなり、例えば、第１制限通路および第２制限通路を互いに交差させる必要がなくなる等、第１制限通路および第２制限通路を容易に形成することができる。 Further, the first limiting passage communicates the first pressure receiving liquid chamber and the third pressure receiving liquid chamber, and the second limiting passage communicates the second pressure receiving liquid chamber and the fourth pressure receiving liquid chamber. You may.
In this case, the first pressure receiving liquid chamber and the third pressure receiving liquid chamber located outside in the axial direction communicate with each other through the first limiting passage, and the second pressure receiving liquid chamber and the second pressure receiving liquid chamber located inside in the axial direction are communicated with each other. 4 The pressure receiving liquid chamber communicates with each other through the second restricted passage, and the first restricted passage and the second restricted passage can be easily formed, for example, it is not necessary to intersect the first restricted passage and the second restricted passage with each other. can do.

本発明によれば、高い減衰性能を発揮させつつ、振動の入力時における高ばね化を抑えることができる。 According to the present invention, it is possible to suppress the increase in spring at the time of inputting vibration while exhibiting high damping performance.

本発明の一実施形態に係る防振装置の縦断面図である。It is a vertical sectional view of the vibration isolation device which concerns on one Embodiment of this invention. 図１に示す防振装置における第１〜第４受圧液室と、第１制限通路および第２制限通路と、の連通状態を示す模式図である。It is a schematic diagram which shows the communication state of the 1st to 4th pressure receiving liquid chambers, 1st restriction passage and 2nd restriction passage in the vibration isolation device shown in FIG.

以下、図面を参照し、本発明の一実施形態に係る防振装置１０について説明する。
図１および図２に示すように、防振装置１０は、内部に液体（例えばエチレングリコール、水、シリコーンオイル等）が封入された、いわゆる液体封入型である。防振装置１０は、例えばキャビンマウント等に好適に適用することができる。 Hereinafter, the vibration isolator 10 according to the embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the vibration isolator 10 is a so-called liquid-filled type in which a liquid (for example, ethylene glycol, water, silicone oil, etc.) is sealed inside. The anti-vibration device 10 can be suitably applied to, for example, a cabin mount or the like.

図１に示すように、防振装置１０は、筒状の外側取付部材１１と、内側取付部材１２と、一対の第１本体ゴム１３と、第２本体ゴム１４と、第３本体ゴム１５と、仕切部材１６と、を備え、仕切部材１６には、第１制限通路５１と第２制限通路５２とが形成されている。
防振装置１０は、図示しない振動発生部と振動受部との間に配置され、外側取付部材１１が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、内側取付部材１２が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。
以下の説明において、外側取付部材１１の中心軸線Ｏに沿う方向を軸方向といい、軸方向に沿う外側取付部材１１の中央部側を軸方向の内側といい、外側取付部材１１の開口部側を軸方向の外側という。また、軸方向から見た平面視で、中心軸線Ｏに直交する方向を径方向という。 As shown in FIG. 1, the vibration isolator 10 includes a tubular outer mounting member 11, an inner mounting member 12, a pair of first main body rubber 13, a second main body rubber 14, and a third main body rubber 15. A partition member 16 is provided, and the partition member 16 is formed with a first limiting passage 51 and a second limiting passage 52.
The vibration isolator 10 is arranged between a vibration generating portion and a vibration receiving portion (not shown), the outer mounting member 11 is connected to either the vibration generating portion or the vibration receiving portion, and the inner mounting member 12 vibrates. It is connected to either the generating part or the vibration receiving part.
In the following description, the direction along the central axis O of the outer mounting member 11 is referred to as the axial direction, the central portion side of the outer mounting member 11 along the axial direction is referred to as the inner side in the axial direction, and the opening side of the outer mounting member 11 is referred to. Is called the outside in the axial direction. Further, the direction orthogonal to the central axis O in the plan view seen from the axial direction is called the radial direction.

外側取付部材１１は、軸方向の内側部分が縮径されている。外側取付部材１１の内側には、中間筒部材２１が嵌合されている。中間筒部材２１は、軸方向に間隔をあけて一対配設されている。
中間筒部材２１は、外側取付部材１１における軸方向の外端部内に嵌合された大径筒部２１Ｂと、大径筒部２１Ｂより軸方向の内側に配置された小径筒部２１Ａと、を備えている。小径筒部２１Ａにおける軸方向の外端部には、径方向の外側に向けて突出する内フランジ部２１Ｃが形成されている。
小径筒部２１Ａの外周面は、外側取付部材１１の内周面と径方向に隙間を設けて対向している。 The diameter of the outer mounting member 11 is reduced in the inner portion in the axial direction. An intermediate cylinder member 21 is fitted inside the outer mounting member 11. A pair of intermediate cylinder members 21 are arranged at intervals in the axial direction.
The intermediate cylinder member 21 includes a large-diameter cylinder portion 21B fitted in the outer end portion in the axial direction of the outer mounting member 11 and a small-diameter cylinder portion 21A arranged inside the large-diameter cylinder portion 21B in the axial direction. I have. An inner flange portion 21C that projects outward in the radial direction is formed at the outer end portion in the axial direction of the small diameter tubular portion 21A.
The outer peripheral surface of the small diameter tubular portion 21A faces the inner peripheral surface of the outer mounting member 11 with a gap in the radial direction.

大径筒部２１Ｂにおける軸方向の外端部には、径方向の外側に向けて突出し、外側取付部材１１に固定される固定フランジ部２１Ｄが形成されている。
外側取付部材１１の軸方向の両端部には、径方向の内側に向けて折り曲げられた折曲部１１Ａが形成されている。折曲部１１Ａにより、軸方向の外側から、中間筒部材２１における固定フランジ部２１Ｄの径方向の外端部が覆われることで、中間筒部材２１が外側取付部材１１に固定されている。 A fixed flange portion 21D is formed at the outer end portion of the large-diameter tubular portion 21B in the axial direction so as to project outward in the radial direction and be fixed to the outer mounting member 11.
Bent portions 11A bent inward in the radial direction are formed at both ends of the outer mounting member 11 in the axial direction. The intermediate cylinder member 21 is fixed to the outer mounting member 11 by covering the radial outer end portion of the fixed flange portion 21D of the intermediate cylinder member 21 from the outside in the axial direction by the bent portion 11A.

内側取付部材１２は、外側取付部材１１の径方向の内側に配置されている。内側取付部材１２は筒状をなし、中心軸線Ｏと同軸に配置されている。また、外側取付部材１１および内側取付部材１２それぞれにおける軸方向の中央部の位置は、互いに同等となっている。
内側取付部材１２の軸方向の両端部はそれぞれ、外側取付部材１１から軸方向の外側に突出している。内側取付部材１２の軸方向の両端部には、径方向の外側に向けて突出する取付フランジ部１２Ａが各別に形成されている。 The inner mounting member 12 is arranged inside the outer mounting member 11 in the radial direction. The inner mounting member 12 has a tubular shape and is arranged coaxially with the central axis O. Further, the positions of the central portions in the axial direction of the outer mounting member 11 and the inner mounting member 12 are the same as each other.
Both ends of the inner mounting member 12 in the axial direction project outward from the outer mounting member 11 in the axial direction, respectively. Mounting flange portions 12A projecting outward in the radial direction are separately formed at both ends of the inner mounting member 12 in the axial direction.

一対の第１本体ゴム１３は、外側取付部材１１と内側取付部材１２とを連結するとともに、軸方向に間隔をあけて配置されている。第１本体ゴム１３は、中間筒部材２１を介して、外側取付部材１１に連結されている。
第１本体ゴム１３は環状をなしている。第１本体ゴム１３は、径方向の外側に向かうに従い漸次、軸方向の内側に向けて延びている。
第１本体ゴム１３における径方向の外端部は、中間筒部材２１における大径筒部２１Ｂの内周面に加硫接着され、第１本体ゴム１３における径方向の内端部は、内側取付部材１２の外周面に加硫接着されている。 The pair of first main body rubbers 13 connect the outer mounting member 11 and the inner mounting member 12, and are arranged at intervals in the axial direction. The first main body rubber 13 is connected to the outer mounting member 11 via the intermediate cylinder member 21.
The first main body rubber 13 has an annular shape. The first main body rubber 13 gradually extends inward in the axial direction toward the outside in the radial direction.
The radial outer end of the first main body rubber 13 is vulcanized and adhered to the inner peripheral surface of the large diameter tubular portion 21B of the intermediate tubular member 21, and the radial inner end of the first main body rubber 13 is attached inside. It is vulcanized and adhered to the outer peripheral surface of the member 12.

液室３０は、外側取付部材１１、内側取付部材１２、および一対の第１本体ゴム１３により囲まれた空間となっている。図示の例では、液室３０は、外側取付部材１１に嵌合された中間筒部材２１の内周面、内側取付部材１２の外周面、および一対の第１本体ゴム１３それぞれにおける軸方向の内側を向く内面により囲まれた空間となっている。 The liquid chamber 30 is a space surrounded by an outer mounting member 11, an inner mounting member 12, and a pair of first main body rubber 13. In the illustrated example, the liquid chamber 30 is the inner peripheral surface of the intermediate tubular member 21 fitted to the outer mounting member 11, the outer peripheral surface of the inner mounting member 12, and the inner side in the axial direction of each of the pair of first main body rubbers 13. It is a space surrounded by the inner surface facing.

仕切部材１６は、外側取付部材１１と内側取付部材１２とを連結するとともに、第１本体ゴム１３間の液室３０を、軸方向に第１液室３１と第２液室３２とに仕切っている。仕切部材１６は環状をなし、液室３０における軸方向の中央部に配設されている。仕切部材１６の外周面は外側取付部材１１の内周面に連結され、仕切部材１６の内周面は内側取付部材１２の外周面に連結されている。仕切部材１６の、後述する外側剛体部１６Ａは、一対の中間筒部材２１同士の軸方向の隙間に配設されている。
第１液室３１および第２液室３２それぞれの容積は、互いに同等とされている。なお、第１液室３１および第２液室３２それぞれの容積は、互いに異なっていてもよい。 The partition member 16 connects the outer mounting member 11 and the inner mounting member 12, and divides the liquid chamber 30 between the first main body rubber 13 into the first liquid chamber 31 and the second liquid chamber 32 in the axial direction. There is. The partition member 16 has an annular shape and is arranged at the central portion in the axial direction of the liquid chamber 30. The outer peripheral surface of the partition member 16 is connected to the inner peripheral surface of the outer mounting member 11, and the inner peripheral surface of the partition member 16 is connected to the outer peripheral surface of the inner mounting member 12. The outer rigid body portion 16A of the partition member 16, which will be described later, is arranged in the axial gap between the pair of intermediate cylinder members 21.
The volumes of the first liquid chamber 31 and the volume of the second liquid chamber 32 are the same as each other. The volumes of the first liquid chamber 31 and the second liquid chamber 32 may be different from each other.

第２本体ゴム１４は、第１液室３１を、第１本体ゴム１３を隔壁の一部とする第１受圧液室４１、および仕切部材１６を隔壁の一部とする第２受圧液室４２に区画している。
第２本体ゴム１４および第３本体ゴム１５は、環状をなしている。第２本体ゴム１４および第３本体ゴム１５は、径方向の外側に向かうに従い漸次、軸方向の内側に向けて延びている。第２本体ゴム１４および第３本体ゴム１５における径方向の各外端部は、中間筒部材２１における小径筒部２１Ａの内周面に加硫接着され、第２本体ゴム１４および第３本体ゴム１５における径方向の各内端部は、内側取付部材１２の外周面に加硫接着されている。 The second main body rubber 14 has a first liquid chamber 31, a first pressure receiving liquid chamber 41 having the first main body rubber 13 as a part of the partition wall, and a second pressure receiving liquid chamber 42 having the partition member 16 as a part of the partition wall. It is divided into.
The second main body rubber 14 and the third main body rubber 15 form an annular shape. The second main body rubber 14 and the third main body rubber 15 gradually extend inward in the axial direction toward the outside in the radial direction. The radial outer ends of the second main body rubber 14 and the third main body rubber 15 are vulcanized and adhered to the inner peripheral surface of the small diameter tubular portion 21A of the intermediate tubular member 21, and the second main body rubber 14 and the third main body rubber are bonded. Each radial inner end portion of No. 15 is vulcanized and adhered to the outer peripheral surface of the inner mounting member 12.

第１受圧液室４１は、外側取付部材１１、内側取付部材１２、第１本体ゴム１３、および第２本体ゴム１４により囲まれた空間となっている。図示の例では、第１受圧液室４１は、外側取付部材１１に嵌合された中間筒部材２１の内周面、第１本体ゴム１３における軸方向の内側を向く内面、内側取付部材１２の外周面、および第２本体ゴム１４における軸方向の外側を向く外面により囲まれた空間となっている。 The first pressure receiving liquid chamber 41 is a space surrounded by an outer mounting member 11, an inner mounting member 12, a first main body rubber 13, and a second main body rubber 14. In the illustrated example, the first pressure receiving liquid chamber 41 is the inner peripheral surface of the intermediate cylinder member 21 fitted to the outer mounting member 11, the inner surface of the first main body rubber 13 facing inward in the axial direction, and the inner mounting member 12. It is a space surrounded by an outer peripheral surface and an outer surface of the second main body rubber 14 facing outward in the axial direction.

第２受圧液室４２は、内側取付部材１２、仕切部材１６、および第２本体ゴム１４を隔壁として囲まれた空間となっている。図示の例では、第２受圧液室４２は、内側取付部材１２の外周面、仕切部材１６における軸方向の外側を向く外面、および第２本体ゴム１４における軸方向の内側を向く内面により囲まれた空間となっている。 The second pressure receiving liquid chamber 42 is a space surrounded by the inner mounting member 12, the partition member 16, and the second main body rubber 14 as partition walls. In the illustrated example, the second pressure receiving liquid chamber 42 is surrounded by the outer peripheral surface of the inner mounting member 12, the outer surface of the partition member 16 facing outward in the axial direction, and the inner surface of the second main body rubber 14 facing inward in the axial direction. It is a space.

第３受圧液室４３は、外側取付部材１１、内側取付部材１２、第１本体ゴム１３、および第３本体ゴム１５により囲まれた空間となっている。図示の例では、第３受圧液室４３は、外側取付部材１１に嵌合された中間筒部材２１の内周面、第１本体ゴム１３における軸方向の内側を向く内面、内側取付部材１２の外周面、および第３本体ゴム１５における軸方向の外側を向く外面により囲まれた空間となっている。 The third pressure receiving liquid chamber 43 is a space surrounded by an outer mounting member 11, an inner mounting member 12, a first main body rubber 13, and a third main body rubber 15. In the illustrated example, the third pressure receiving liquid chamber 43 is the inner peripheral surface of the intermediate cylinder member 21 fitted to the outer mounting member 11, the inner surface of the first main body rubber 13 facing inward in the axial direction, and the inner mounting member 12. It is a space surrounded by an outer peripheral surface and an outer surface of the third main body rubber 15 facing outward in the axial direction.

第４受圧液室４４は、内側取付部材１２、仕切部材１６、および第３本体ゴム１５を隔壁として囲まれた空間となっている。図示の例では、第４受圧液室４４は、内側取付部材１２の外周面、仕切部材１６における軸方向の外側を向く外面、および第３本体ゴム１５における軸方向の内側を向く内面により囲まれた空間となっている。 The fourth pressure receiving liquid chamber 44 is a space surrounded by the inner mounting member 12, the partition member 16, and the third main body rubber 15 as partition walls. In the illustrated example, the fourth pressure receiving liquid chamber 44 is surrounded by the outer peripheral surface of the inner mounting member 12, the outer surface of the partition member 16 facing outward in the axial direction, and the inner surface of the third main body rubber 15 facing inward in the axial direction. It is a space.

第２本体ゴム１４および第３本体ゴム１５の体積は、互いに同等とされ、第１本体ゴム１３の体積よりも小さくなっている。
第１受圧液室４１および第３受圧液室４３の容積は互いに同等とされ、第２受圧液室４２および第４受圧液室４４の容積は互いに同等とされている。また、第１受圧液室４１および第３受圧液室４３は、第２受圧液室４２および第４受圧液室４４よりも縦断面視における軸方向の大きさが小さくなっている。なお、第１〜第３本体ゴムの体積および第１〜第４受圧液室の形状については、このような態様に限られず、任意に変更可能である。 The volumes of the second main body rubber 14 and the third main body rubber 15 are equal to each other, and are smaller than the volume of the first main body rubber 13.
The volumes of the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43 are made equal to each other, and the volumes of the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 44 are made equal to each other. Further, the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43 are smaller in the axial direction in the vertical cross-sectional view than the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 44. The volume of the first to third main body rubbers and the shape of the first to fourth pressure receiving liquid chambers are not limited to such an embodiment and can be arbitrarily changed.

仕切部材１６には、第３受圧液室４３および第４受圧液室４４のうちのいずれか一方と、第１受圧液室４１と、を連通する第１制限通路５１と、第３受圧液室４３および第４受圧液室４４のうちのいずれか他方と、第２受圧液室４２と、を連通する第２制限通路５２と、が形成されている。
図示の例では、図２に示すように、第１制限通路５１は、第１受圧液室４１と第３受圧液室４３とを連通し、第２制限通路５２は、第２受圧液室４２と第４受圧液室４４とを連通している。 The partition member 16 has a first limiting passage 51 and a third pressure receiving liquid chamber that communicate with any one of the third pressure receiving liquid chamber 43 and the fourth pressure receiving liquid chamber 44 and the first pressure receiving liquid chamber 41. A second limiting passage 52 that communicates with any one of the 43 and the fourth pressure receiving liquid chamber 44 and the second pressure receiving liquid chamber 42 is formed.
In the illustrated example, as shown in FIG. 2, the first limiting passage 51 communicates the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43, and the second limiting passage 52 is the second pressure receiving liquid chamber 42. And the fourth pressure receiving liquid chamber 44 are communicated with each other.

そして本実施形態では、第１制限通路５１および第２制限通路５２それぞれの流通抵抗が、互いに異なっている。図示の例では、第１制限通路５１および第２制限通路５２の流路断面積が互いに同等とされ、第１制限通路５１の流路長と、第２制限通路５２の流路長と、が互いに異なっている。
図１に示すように、第１制限通路５１は、仕切部材１６のうち、第２受圧液室４２および第４受圧液室４４よりも径方向の外側に位置する部分に形成されている。第２制限通路５２は、仕切部材１６のうち、第１制限通路５１より径方向の内側に位置する部分に形成されている。 In the present embodiment, the flow resistances of the first restricted passage 51 and the second restricted passage 52 are different from each other. In the illustrated example, the flow path cross-sectional areas of the first limiting passage 51 and the second limiting passage 52 are made equal to each other, and the flow path length of the first limiting passage 51 and the flow path length of the second limiting passage 52 are They are different from each other.
As shown in FIG. 1, the first limiting passage 51 is formed in a portion of the partition member 16 located outside the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 44 in the radial direction. The second limiting passage 52 is formed in a portion of the partition member 16 located inside the first limiting passage 51 in the radial direction.

また本実施形態では、仕切部材１６は、外側取付部材１１に連結された筒状の外側剛体部１６Ａと、内側取付部材１２に連結された環状の内側剛体部１６Ｂと、外側剛体部１６Ａと内側剛体部１６Ｂとを連結する環状の弾性部１６Ｃと、を備えている。
外側剛体部１６Ａおよび内側剛体部１６Ｂそれぞれにおける軸方向の中央部の位置は、互いに同等となっている。外側剛体部１６Ａにおける軸方向の外端部は、内側剛体部１６Ｂよりも軸方向の外側に突出している。 Further, in the present embodiment, the partition member 16 includes a tubular outer rigid body portion 16A connected to the outer mounting member 11, an annular inner rigid body portion 16B connected to the inner mounting member 12, and an outer rigid body portion 16A and an inner side. It includes an annular elastic portion 16C that connects the rigid body portion 16B.
The positions of the central portions in the axial direction of the outer rigid body portion 16A and the inner rigid body portion 16B are equivalent to each other. The outer end portion of the outer rigid body portion 16A in the axial direction protrudes outward in the axial direction from the inner rigid body portion 16B.

外側剛体部１６Ａの軸方向の外端部は、中間筒部材２１における小径筒部２１Ａの外周面と、外側取付部材１１の内周面と、の間の径方向の隙間に嵌合されている。
小径筒部２１Ａの内フランジ部２１Ｃが、大径筒部２１Ｂの軸方向の内端部と、外側剛体部１６Ａの軸方向の外端部と、により軸方向に挟まれている。
外側剛体部１６Ａの外周面には、全周にわたって延びるとともに、軸方向の一方側から他方側に向けて延びる流路溝１６Ｄが形成されている。流路溝１６Ｄと外側取付部材１１の内周面とに囲まれた空間が、第１制限通路５１とされている。内側剛体部１６Ｂに第２制限通路５２が形成されている。 The axial outer end of the outer rigid body portion 16A is fitted in a radial gap between the outer peripheral surface of the small diameter tubular portion 21A of the intermediate tubular member 21 and the inner peripheral surface of the outer mounting member 11. ..
The inner flange portion 21C of the small diameter tubular portion 21A is axially sandwiched by the axial inner end portion of the large diameter tubular portion 21B and the axial outer end portion of the outer rigid body portion 16A.
On the outer peripheral surface of the outer rigid body portion 16A, a flow path groove 16D extending over the entire circumference and extending from one side in the axial direction to the other side is formed. The space surrounded by the flow path groove 16D and the inner peripheral surface of the outer mounting member 11 is defined as the first limiting passage 51. A second limiting passage 52 is formed in the inner rigid body portion 16B.

外側剛体部１６Ａの内周面における軸方向の中央部には、径方向の内側に向けて突出する係止突部１６Ｅが形成されている。係止突部１６Ｅにおける軸方向の外側を向く外面に、中間筒部材２１の小径筒部２１Ａの軸方向の内端部が係止されている。
外側剛体部１６Ａにおける係止突部１６Ｅの内周面と、内側剛体部１６Ｂの外周面と、に弾性部１６Ｃが全周にわたって加硫接着されることにより、外側剛体部１６Ａと内側剛体部１６Ｂとが、互いに連結されている。弾性部１６Ｃの体積は、第１本体ゴム１３、第２本体ゴム１４、および第３本体ゴム１５の体積よりも小さくなっている。 A locking protrusion 16E that projects inward in the radial direction is formed at the central portion in the axial direction on the inner peripheral surface of the outer rigid body portion 16A. The axially inner end of the small-diameter tubular portion 21A of the intermediate tubular member 21 is locked to the outer surface of the locking protrusion 16E facing outward in the axial direction.
The elastic portion 16C is vulcanized and adhered to the inner peripheral surface of the locking protrusion 16E in the outer rigid body portion 16A and the outer peripheral surface of the inner rigid body portion 16B over the entire circumference, whereby the outer rigid body portion 16A and the inner rigid body portion 16B are bonded. Are connected to each other. The volume of the elastic portion 16C is smaller than the volumes of the first main body rubber 13, the second main body rubber 14, and the third main body rubber 15.

第１制限通路５１の流路長は、第２制限通路５２の流路長よりも長くなっている。これにより、第１制限通路５１の流通抵抗が、第２制限通路５２の流通抵抗よりも大きくなっている。
なお、このような態様に限られず、第１制限通路５１および第２制限通路５２それぞれの流路断面積および流路長は任意に変更可能である。例えば、第１制限通路５１を内側剛体部１６Ｂに形成し、第２制限通路５２を外側剛体部１６Ａに形成する等してもよい。また、第２制限通路５２の流通抵抗が、第１制限通路５１の流通抵抗よりも大きくなってもよい。 The flow path length of the first limiting passage 51 is longer than the flow path length of the second limiting passage 52. As a result, the circulation resistance of the first limiting passage 51 is larger than the circulation resistance of the second limiting passage 52.
Not limited to such an aspect, the flow path cross-sectional area and the flow path length of each of the first limiting passage 51 and the second limiting passage 52 can be arbitrarily changed. For example, the first limiting passage 51 may be formed in the inner rigid body portion 16B, the second limiting passage 52 may be formed in the outer rigid body portion 16A, and the like. Further, the flow resistance of the second limiting passage 52 may be larger than the flow resistance of the first limiting passage 51.

次に、防振装置１０の作用について説明する。
軸方向の振動が入力されると、第１受圧液室４１および第２受圧液室４２を有する第１液室３１、並びに、第３受圧液室４３および第４受圧液室４４を有する第２液室３２のうちのいずれか一方が、圧縮変形する一方、他方は拡張変形することとなる。この際、一対の第１本体ゴム１３、第２本体ゴム１４、第３本体ゴム１５、および仕切部材１６の弾性部１６Ｃがそれぞれ弾性変形する。
これにより、第１受圧液室４１と第３受圧液室４３との間を第１制限通路５１を通して液体が流通する一方、第２受圧液室４２と第４受圧液室４４との間を第２制限通路５２を通して液体が流通する。したがって、第１制限通路５１および第２制限通路５２を通して液体が往来し、第１制限通路５１および第２制限通路５２で液柱共振が生じて振動が減衰、吸収される。
この際、第１制限通路５１および第２制限通路５２それぞれにおける共振周波数が互いに異なっているので、幅広い周波数帯域において減衰特性を発揮することができる。 Next, the operation of the vibration isolator 10 will be described.
When axial vibration is input, a first liquid chamber 31 having a first pressure receiving liquid chamber 41 and a second pressure receiving liquid chamber 42, and a second having a third pressure receiving liquid chamber 43 and a fourth pressure receiving liquid chamber 44 are provided. One of the liquid chambers 32 will be compressed and deformed, while the other will be expanded and deformed. At this time, the pair of first main body rubber 13, the second main body rubber 14, the third main body rubber 15, and the elastic portion 16C of the partition member 16 are elastically deformed, respectively.
As a result, the liquid flows between the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43 through the first limiting passage 51, while the liquid flows between the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 44. 2 Liquid flows through the restricted passage 52. Therefore, the liquid flows in and out through the first limiting passage 51 and the second limiting passage 52, liquid column resonance occurs in the first limiting passage 51 and the second limiting passage 52, and the vibration is attenuated and absorbed.
At this time, since the resonance frequencies of the first limiting passage 51 and the second limiting passage 52 are different from each other, the attenuation characteristics can be exhibited in a wide frequency band.

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制限通路５１および第２制限通路５２が連通する４つ全ての液室が、第１本体ゴム１３、第２本体ゴム１４、および第３本体ゴム１５のうちの少なくとも１つを隔壁の一部に有していて、振動の入力に伴い液圧が変動する受圧液室となっているので、振動の入力時における液圧の変動量が大きくなり、高い減衰性能を発揮させることができる。 As described above, according to the vibration isolator 10 according to the present embodiment, all four liquid chambers through which the first limiting passage 51 and the second limiting passage 52 communicate are the first main body rubber 13 and the second main body. Since at least one of the rubber 14 and the rubber 15 of the third main body is provided in a part of the partition wall to form a pressure receiving liquid chamber in which the hydraulic pressure fluctuates with the input of vibration, it is possible to obtain a pressure receiving liquid chamber at the time of inputting vibration. The amount of fluctuation in the hydraulic pressure becomes large, and high damping performance can be exhibited.

また、第１制限通路５１および第２制限通路５２それぞれの共振周波数が互いに異なっているので、共振周波数が２つ存在することとなり、第１制限通路５１および第２制限通路５２それぞれにおける液柱共振に基づく減衰特性の各ピーク間を平準化させることが可能になり、動ばねが幅広い周波数帯域で低減されることとなり、振動の入力時における高ばね化を抑えることができる。 Further, since the resonance frequencies of the first limiting passage 51 and the second limiting passage 52 are different from each other, there are two resonance frequencies, and the liquid column resonance in each of the first limiting passage 51 and the second limiting passage 52. It becomes possible to level the peaks of the damping characteristic based on the above, the dynamic spring is reduced in a wide frequency band, and the high spring at the time of inputting the vibration can be suppressed.

また、軸方向の外側に位置する第１受圧液室４１と第３受圧液室４３とが第１制限通路５１を通して互いに連通し、軸方向の内側に位置する第２受圧液室４２と第４受圧液室４４とが第２制限通路５２を通して互いに連通しているので、第１制限通路５１および第２制限通路５２を互いに交差させる必要がなくなる等、第１制限通路５１および第２制限通路５２を容易に形成することができる。 Further, the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43 located outside in the axial direction communicate with each other through the first limiting passage 51, and the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 42 located inside in the axial direction. Since the pressure receiving liquid chamber 44 communicates with each other through the second restricted passage 52, it is not necessary to intersect the first restricted passage 51 and the second restricted passage 52 with each other, and the first restricted passage 51 and the second restricted passage 52 Can be easily formed.

また、仕切部材１６のうち、弾性部１６Ｃが外側剛体部１６Ａと内側剛体部１６Ｂとを連結しているので、例えば仕切部材１６を、外側取付部材１１および内側取付部材１２に組み付けるときに、弾性部１６Ｃを変形させることで組み付け易くすることが可能になり、組み付け性を向上させ易くすることができる。 Further, since the elastic portion 16C of the partition member 16 connects the outer rigid body portion 16A and the inner rigid body portion 16B, for example, when the partition member 16 is assembled to the outer mounting member 11 and the inner mounting member 12, it is elastic. By deforming the portion 16C, it becomes possible to easily assemble, and it is possible to easily improve the assembleability.

なお、本発明の技術的範囲は前記実施の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、上記実施形態においては、第１制限通路５１が、第１受圧液室４１と第３受圧液室４３とを連通し、第２制限通路５２が、第２受圧液室４２と第４受圧液室４４とを連通した構成を示したが、このような態様に限られない。第１制限通路が、第１受圧液室４１と第４受圧液室４４とを連通し、第２制限通路が、第２受圧液室４２と第３受圧液室４３とを連通してもよい。 The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the first limiting passage 51 communicates the first pressure receiving liquid chamber 41 and the third pressure receiving liquid chamber 43, and the second limiting passage 52 communicates with the second pressure receiving liquid chamber 42 and the fourth pressure receiving liquid chamber 42. Although the configuration in which the liquid chamber 44 is communicated with the liquid chamber 44 is shown, the present invention is not limited to such a mode. The first limiting passage may communicate the first pressure receiving liquid chamber 41 and the fourth pressure receiving liquid chamber 44, and the second limiting passage may communicate the second pressure receiving liquid chamber 42 and the third pressure receiving liquid chamber 43. ..

また、上記実施形態においては、仕切部材１６が、外側取付部材１１に連結された環状の外側剛体部１６Ａと、内側取付部材１２に連結された環状の内側剛体部１６Ｂと、外側剛体部１６Ａと内側剛体部１６Ｂとを連結する環状の弾性部１６Ｃと、を備えている構成を示したが、このような態様に限られない。仕切部材は、例えば剛体部のみを備えてもよい。 Further, in the above embodiment, the partition member 16 includes an annular outer rigid body portion 16A connected to the outer mounting member 11, an annular inner rigid body portion 16B connected to the inner mounting member 12, and an outer rigid body portion 16A. Although the configuration including the annular elastic portion 16C connecting the inner rigid body portion 16B and the annular elastic portion 16C is shown, the present invention is not limited to such an embodiment. The partition member may include, for example, only a rigid body portion.

また、上記実施形態においては、防振装置１０が、第２本体ゴム１４および第３本体ゴム１５を、それぞれ１つずつ備えた構成を示したが、このような態様に限られない。防振装置１０は、第２本体ゴム１４および第３本体ゴム１５を、それぞれ複数ずつ備え、液室３０に５つ以上の受圧液室が区画されてもよい。 Further, in the above embodiment, the anti-vibration device 10 is provided with one second main body rubber 14 and one third main body rubber 15, but the present invention is not limited to such a mode. The vibration isolator 10 may include a plurality of second main body rubber 14 and a plurality of third main body rubber 15, and five or more pressure receiving liquid chambers may be partitioned in the liquid chamber 30.

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、上記した実施形態や変形例を適宜組み合わせてもよい。 In addition, it is possible to replace the constituent elements in the above-described embodiment with well-known constituent elements as appropriate without departing from the spirit of the present invention, and the above-described embodiments and modifications may be appropriately combined.

１０防振装置
１１外側取付部材
１２内側取付部材
１３第１本体ゴム
１４第２本体ゴム
１５第３本体ゴム
１６仕切部材
１６Ａ外側剛体部
１６Ｂ内側剛体部
１６Ｃ弾性部
３１第１液室
３２第２液室
４１第１受圧液室
４２第２受圧液室
４３第３受圧液室
４４第４受圧液室
５１第１制限通路
５２第２制限通路 10 Anti-vibration device 11 Outer mounting member 12 Inner mounting member 13 1st body rubber 14 2nd body rubber 15 3rd body rubber 16 Partition member 16A Outer rigid body part 16B Inner rigid body part 16C Elastic part 31 1st liquid chamber 32 2nd liquid Room 41 1st pressure receiving liquid room 42 2nd pressure receiving liquid room 43 3rd pressure receiving liquid room 44 4th pressure receiving liquid room 51 1st limiting passage 52 2nd limiting passage

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外側取付部材、および他方に連結されるとともに、前記外側取付部材の内側に配置された内側取付部材と、
前記外側取付部材と前記内側取付部材とを連結するとともに、前記外側取付部材の中心軸線に沿う軸方向に間隔をあけて配置された一対の第１本体ゴムと、
前記外側取付部材と前記内側取付部材とを連結するとともに、一対の前記第１本体ゴム間の液室を、前記軸方向に第１液室と第２液室とに仕切る仕切部材と、
前記第１液室を、前記第１本体ゴムを隔壁の一部とする第１受圧液室、および前記仕切部材を隔壁の一部とする第２受圧液室に区画する第２本体ゴムと、
前記第２液室を、前記第１本体ゴムを隔壁の一部とする第３受圧液室、および前記仕切部材を隔壁の一部とする第４受圧液室に区画する第３本体ゴムと、を備え、
前記仕切部材には、前記第３受圧液室および前記第４受圧液室のうちのいずれか一方と、前記第１受圧液室と、を連通する第１制限通路と、
前記第３受圧液室および前記第４受圧液室のうちのいずれか他方と、前記第２受圧液室と、を連通する第２制限通路と、が形成され、
前記第１制限通路および前記第２制限通路それぞれの流通抵抗が、互いに異なり、
前記仕切部材は、前記外側取付部材に連結された環状の外側剛体部と、前記内側取付部材に連結された環状の内側剛体部と、前記外側剛体部と前記内側剛体部とを連結する環状の弾性部と、を備えていることを特徴とする防振装置。 A tubular outer mounting member connected to either one of the vibration generating portion and the vibration receiving portion, and an inner mounting member connected to the other and arranged inside the outer mounting member.
A pair of first main body rubbers that connect the outer mounting member and the inner mounting member and are arranged at intervals in the axial direction along the central axis of the outer mounting member.
A partition member that connects the outer mounting member and the inner mounting member and divides the pair of liquid chambers between the first main body rubbers into a first liquid chamber and a second liquid chamber in the axial direction.
A second main body rubber for partitioning the first liquid chamber into a first pressure receiving liquid chamber in which the first main body rubber is a part of a partition wall and a second pressure receiving liquid chamber in which the partition member is a part of a partition wall.
A third main body rubber for partitioning the second liquid chamber into a third pressure receiving liquid chamber having the first main body rubber as a part of the partition wall and a fourth pressure receiving liquid chamber having the partition member as a part of the partition wall. With
The partition member includes a first limiting passage that communicates one of the third pressure receiving liquid chamber and the fourth pressure receiving liquid chamber with the first pressure receiving liquid chamber.
A second limiting passage that communicates with any one of the third pressure receiving liquid chamber and the fourth pressure receiving liquid chamber and the second pressure receiving liquid chamber is formed.
Said first restricting passage and said second restricting passage each flow resistance is, unlike each other,
The partition member is an annular outer rigid body portion connected to the outer mounting member, an annular inner rigid body portion connected to the inner mounting member, and an annular shape connecting the outer rigid body portion and the inner rigid body portion. A vibration isolator characterized by having an elastic part.

前記第１制限通路は、前記第１受圧液室と前記第３受圧液室とを連通し、
前記第２制限通路は、前記第２受圧液室と前記第４受圧液室とを連通することを特徴とする請求項１に記載の防振装置。 The first limiting passage communicates the first pressure receiving liquid chamber and the third pressure receiving liquid chamber, and communicates with the first pressure receiving liquid chamber.
The vibration isolator according to claim 1, wherein the second limiting passage communicates the second pressure receiving liquid chamber and the fourth pressure receiving liquid chamber.