JP2017089662A - Vibration isolator - Google Patents

Vibration isolator Download PDF

Info

Publication number
JP2017089662A
JP2017089662A JP2015215677A JP2015215677A JP2017089662A JP 2017089662 A JP2017089662 A JP 2017089662A JP 2015215677 A JP2015215677 A JP 2015215677A JP 2015215677 A JP2015215677 A JP 2015215677A JP 2017089662 A JP2017089662 A JP 2017089662A
Authority
JP
Japan
Prior art keywords
peripheral surface
outer cylinder
radial direction
mounting member
inner mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2015215677A
Other languages
Japanese (ja)
Other versions
JP6577835B2 (en
Inventor
博亮 木暮
Hiroaki Kogure
博亮 木暮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP2015215677A priority Critical patent/JP6577835B2/en
Publication of JP2017089662A publication Critical patent/JP2017089662A/en
Application granted granted Critical
Publication of JP6577835B2 publication Critical patent/JP6577835B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Combined Devices Of Dampers And Springs (AREA)

Abstract

PROBLEM TO BE SOLVED: To secure the liquid-tightness and durability of an orifice passage easily and certainly while restricting manufacturing cost.SOLUTION: On the outer peripheral surface of an elastic body 13 elastically connecting an inner attachment member 11 to an external cylinder 12, hollow parts 14 are formed separately on both sides parts interposing the inner attachment member therebetween in a radial direction. By fitting cover members 17 into each hollow part separately, the hollow part is covered from the outside in the radial direction to demarcate liquid chambers. On the outer peripheral surface of each cover member, a connection groove 19 for communicating the respective liquid chambers with each other, is formed. On the outer peripheral surface of the cover member, a first seal elastic membrane 21 is disposed, which abuts on the inner peripheral surface of the external cylinder in a state of being elastically deformed. On the inner peripheral surface of the cover member, a stopper elastic membrane 22 on which the inner attachment member abuts, is disposed, when the inner attachment member and the external cylinder perform approach movement relatively in the radial direction.SELECTED DRAWING: Figure 2

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.

この種の防振装置として、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内側取付け部材、および他方に連結されるとともに、内側取付け部材を径方向の外側から囲繞する外筒と、内側取付け部材と外筒とを弾性的に連結する弾性体と、を備え、弾性体の外周面には、径方向の内方に向けて窪む窪み部が、内側取付け部材を径方向に挟む両側に各別に形成され、各窪み部に、被覆部材が各別に嵌合されることにより、窪み部が径方向の外側から覆われて液室が画成され、各被覆部材の外周面には、各液室同士を連通する接続溝が形成され、外筒が、弾性体および被覆部材に一体に外嵌することによって、外筒と内側取付け部材とが弾性的に連結されるとともに、接続溝と外筒の内周面との間に、各液室同士を連通するオリフィス通路が画成された構成が知られている。
そして、防振装置に振動が入力されたときに、弾性体が弾性変形しつつ、各液室の内容積が変動することで、液室内の液体がオリフィス通路を流通して液柱共振を生じさせることにより振動が減衰、吸収される。 As this type of vibration isolator, for example, as shown in Patent Document 1 below, an inner mounting member connected to one of a vibration generating portion and a vibration receiving portion, and an inner mounting member connected to the other, An outer cylinder that surrounds the member from the outside in the radial direction, and an elastic body that elastically connects the inner mounting member and the outer cylinder, and the outer peripheral surface of the elastic body is recessed toward the inner side in the radial direction. The recesses are formed separately on both sides of the inner mounting member in the radial direction, and the recesses are respectively fitted to the recesses so that the recesses are covered from the outer side in the radial direction. A connecting groove that communicates each liquid chamber is formed on the outer peripheral surface of each covering member, and the outer cylinder is integrally fitted to the elastic body and the covering member, so that the outer cylinder and the inner mounting are attached. The member is elastically connected to the connection groove and the inner peripheral surface of the outer cylinder During the construction of the orifice passage communicating the liquid chambers with each other it is defined is known.
When vibration is input to the vibration isolator, the elastic body is elastically deformed and the internal volume of each liquid chamber fluctuates, so that the liquid in the liquid chamber flows through the orifice passage and causes liquid column resonance. Vibrations are attenuated and absorbed.

特開２０１２−３６９４６号公報JP 2012-36946 A

しかしながら、前記従来の防振装置では、被覆部材の外周面が、外筒の内周面に直に当接していたので、被覆部材および外筒を高精度に形成しなければ、オリフィス通路の液密性を確保することができないという問題があった。
このような問題を解決するための手段として、外筒の内周面に弾性被膜を配設することが考えられるがこの場合、防振装置を構成する部材のうち、外筒が他の部材と比べて大きいので、製造コストが嵩むという問題が生ずる。 However, in the conventional vibration isolator, since the outer peripheral surface of the covering member is in direct contact with the inner peripheral surface of the outer cylinder, if the covering member and the outer cylinder are not formed with high accuracy, the liquid in the orifice passage There was a problem that the density could not be secured.
As a means for solving such a problem, it is conceivable to dispose an elastic coating on the inner peripheral surface of the outer cylinder. In this case, among the members constituting the vibration isolator, the outer cylinder is different from other members. Since it is larger than that, there arises a problem that the manufacturing cost increases.

この発明は、このような事情を考慮してなされたもので、製造コストを抑えつつ、オリフィス通路の液密性、および耐久性を容易かつ確実に確保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。   The present invention has been made in view of such circumstances, and provides a vibration isolator capable of easily and reliably ensuring liquid tightness and durability of an orifice passage while suppressing manufacturing costs. With the goal.

前記課題を解決して、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連結される内側取付け部材、および他方に連結されるとともに、前記内側取付け部材を径方向の外側から囲繞する外筒と、前記内側取付け部材と前記外筒とを弾性的に連結する弾性体と、を備え、前記弾性体の外周面において、前記内側取付け部材を径方向に挟む両側に位置する部分に、径方向の内方に向けて窪む窪み部が各別に形成され、各前記窪み部に、被覆部材が各別に嵌合されることにより、前記窪み部が径方向の外側から覆われて液室が画成され、各前記被覆部材の外周面には、各前記液室同士を連通する接続溝が形成され、前記外筒が、前記弾性体および前記被覆部材に一体に外嵌することによって、前記外筒と前記内側取付け部材とが弾性的に連結されるとともに、前記接続溝と前記外筒の内周面との間に、各前記液室同士を連通するオリフィス通路が画成され、前記被覆部材において、外周面における少なくとも前記接続溝の開口周縁部には、前記外筒の内周面に弾性変形させられた状態で当接する第１シール弾性膜が配設されるとともに、内周面には、前記内側取付け部材および前記外筒が相対的に径方向に接近移動したときに、前記内側取付け部材が当接するストッパ弾性膜が配設されていることを特徴とする。   In order to solve the above problems and achieve such an object, the vibration isolator of the present invention includes an inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, and connected to the other. And an outer cylinder that surrounds the inner mounting member from the outside in the radial direction, and an elastic body that elastically connects the inner mounting member and the outer cylinder, on the outer peripheral surface of the elastic body, Indentations that are indented inward in the radial direction are formed in portions located on both sides of the inner mounting member in the radial direction, and a covering member is fitted in each of the indentations. Thus, the recess is covered from the outside in the radial direction to define a liquid chamber, and on the outer peripheral surface of each of the covering members, a connection groove that connects the liquid chambers is formed, and the outer cylinder is By integrally fitting to the elastic body and the covering member The outer cylinder and the inner mounting member are elastically coupled, and an orifice passage is defined between the connection groove and the inner peripheral surface of the outer cylinder to communicate the liquid chambers. In the covering member, at least an opening peripheral portion of the connection groove on the outer peripheral surface is provided with a first seal elastic film that is in contact with the inner peripheral surface of the outer cylinder while being elastically deformed, and The surface is provided with a stopper elastic film against which the inner mounting member comes into contact when the inner mounting member and the outer cylinder relatively move in the radial direction.

この発明によれば、被覆部材の外周面に第１シール弾性膜が配設されているので、外筒の内周面に弾性被膜を配設しなくても、接続溝と外筒の内周面との間に画成されたオリフィス通路の液密性を確保することができる。
また、被覆部材の内周面にストッパ弾性膜が配設されているので、内側取付け部材および外筒が相対的に径方向に接近移動したときに、内側取付け部材が被覆部材の内周面に直に当接することが防止され、防振装置に生ずる衝撃力を抑えることが可能になり、この防振装置の耐久性を向上させることができる。
なお、内側取付け部材の外周面において、窪み部の内面の一部を画成する部分に、弾性被膜が配設されている場合には、内側取付け部材および外筒が相対的に径方向に接近移動したときに、弾性被膜が、被覆部材の内周面にストッパ弾性膜を介して当接することとなり、弾性被膜の耐久性を確保することができる。 According to the present invention, since the first seal elastic film is disposed on the outer peripheral surface of the covering member, the connection groove and the inner periphery of the outer cylinder can be provided without providing an elastic film on the inner peripheral surface of the outer cylinder. The liquid tightness of the orifice passage defined between the surfaces can be ensured.
In addition, since the stopper elastic film is disposed on the inner peripheral surface of the covering member, when the inner mounting member and the outer cylinder move relatively in the radial direction, the inner mounting member is placed on the inner peripheral surface of the covering member. The direct contact is prevented, and the impact force generated in the vibration isolator can be suppressed, and the durability of the vibration isolator can be improved.
In addition, in the outer peripheral surface of the inner mounting member, when an elastic coating is disposed on a portion that defines a part of the inner surface of the recess, the inner mounting member and the outer cylinder are relatively close to each other in the radial direction. When moved, the elastic coating comes into contact with the inner peripheral surface of the covering member via the stopper elastic membrane, and the durability of the elastic coating can be ensured.

ここで、前記被覆部材において、前記外筒の中心軸線に沿う軸方向の両側を向く両端面には、前記弾性体における前記窪み部の内面に、弾性変形させられた状態で当接する第２シール弾性膜が配設されてもよい。   Here, in the covering member, a second seal that abuts the inner surface of the hollow portion of the elastic body in an elastically deformed state at both end surfaces facing both axial sides along the central axis of the outer cylinder. An elastic membrane may be provided.

この場合、被覆部材における軸方向の両端面に、第２シール弾性膜が配設されているので、液室内の液密性を向上させることが可能になり、防振性能を安定して発揮させることができる。   In this case, since the second seal elastic film is disposed on both end surfaces in the axial direction of the covering member, it is possible to improve the liquid tightness in the liquid chamber and to stably exhibit the vibration proof performance. be able to.

また、前記第１シール弾性膜、前記ストッパ弾性膜、および前記第２シール弾性膜は、一体に形成されてもよい。   Further, the first seal elastic film, the stopper elastic film, and the second seal elastic film may be integrally formed.

この場合、第１シール弾性膜、ストッパ弾性膜、および第２シール弾性膜が一体に形成されているので、製造コストを抑えつつ、オリフィス通路の液密性、および耐久性を容易かつ確実に確保することが可能な防振装置が得られる。   In this case, since the first seal elastic membrane, the stopper elastic membrane, and the second seal elastic membrane are integrally formed, the liquid tightness and durability of the orifice passage can be easily and reliably secured while suppressing the manufacturing cost. An anti-vibration device that can be obtained is obtained.

この発明に係る防振装置によれば、製造コストを抑えつつ、オリフィス通路の液密性、および耐久性を容易かつ確実に確保することができる。   According to the vibration isolator of the present invention, it is possible to easily and reliably ensure the liquid tightness and durability of the orifice passage while suppressing the manufacturing cost.

本発明に係る一実施形態として示した防振装置の軸方向の中央部における横断面図である。It is a transverse cross section in the central part of the axial direction of the vibration isolator shown as one embodiment concerning the present invention. 図１に示す防振装置のＩＩ−ＩＩ線矢視断面図である。FIG. 2 is a cross-sectional view taken along the line II-II of the vibration isolator shown in FIG. 1. 図１および図２に示す防振装置において、外筒を取り外した状態で、一方の被覆部材を正面から見た側面図である。In the vibration isolator shown in FIG. 1 and FIG. 2, it is the side view which looked at one coating | coated member from the front in the state which removed the outer cylinder. 図１および図２に示す防振装置において、外筒を取り外した状態で、他方の被覆部材を正面から見た側面図である。In the vibration isolator shown in FIG. 1 and FIG. 2, it is the side view which looked at the other coating | coated member from the front in the state which removed the outer cylinder.

以下、本発明に係る防振装置の一実施形態を、図１〜図４を参照しながら説明する。
本実施形態の防振装置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連結される内側取付け部材１１、および他方に連結されるとともに、内側取付け部材１１を径方向の外側から囲繞する外筒１２と、内側取付け部材１１と外筒１２とを弾性的に連結する弾性体１３と、を備えている。
なお、防振装置１は、例えば自動車用のサスペンションブッシュやエンジンマウント、あるいは工場に設置される産業機械のマウント等として用いられる。
以下、外筒１２の中心軸線Ｏに沿う方向を軸方向といい、軸方向から見た平面視において、中心軸線Ｏに直交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。 Hereinafter, an embodiment of a vibration isolator according to the present invention will be described with reference to FIGS.
The vibration isolator 1 of the present embodiment is connected to the inner mounting member 11 connected to one of the vibration generating unit and the vibration receiving unit, and to the other, and the inner mounting member 11 is connected to the outer side in the radial direction. The outer cylinder 12 which surrounds and the elastic body 13 which connects the inner side attachment member 11 and the outer cylinder 12 elastically are provided.
The vibration isolator 1 is used as, for example, a suspension bush for an automobile, an engine mount, or a mount for an industrial machine installed in a factory.
Hereinafter, the direction along the central axis O of the outer cylinder 12 is referred to as the axial direction, and in a plan view viewed from the axial direction, the direction orthogonal to the central axis O is referred to as the radial direction, and the direction around the central axis O is the circumference. It is called direction.

内側取付け部材１１は、中心軸線Ｏと同軸に配設された円筒状体とされ、その軸方向の中間部分に、図２に示されるような縦断面視で径方向の外側に向けて突の曲面状をなす膨出部１１ａが全周にわたって形成されている。膨出部１１ａは、外筒１２の内側に配置されている。なお、内側取付け部材１１の内径は、軸方向の全長にわたって同等になっている。内側取付け部材１１の軸方向の両端部は、外筒１２から軸方向の外側に突出している。
弾性体１３は、ゴム材料により円筒状に形成され、内周面が内側取付け部材１１の外周面にその軸方向の両端部を除く全域にわたって接着されている。なお、弾性体１３は、内側取付け部材１１の外周面に加硫接着されている。一方、外筒１２は、弾性体１３に外嵌することにより内側取付け部材１１に弾性的に連結されている。 The inner mounting member 11 is a cylindrical body disposed coaxially with the central axis O, and protrudes radially outward in a longitudinal sectional view as shown in FIG. A bulging portion 11a having a curved surface is formed over the entire circumference. The bulging portion 11 a is disposed inside the outer cylinder 12. The inner diameter of the inner mounting member 11 is the same over the entire length in the axial direction. Both end portions in the axial direction of the inner mounting member 11 protrude from the outer cylinder 12 to the outer side in the axial direction.
The elastic body 13 is formed of a rubber material in a cylindrical shape, and an inner peripheral surface thereof is bonded to the outer peripheral surface of the inner mounting member 11 over the entire region except for both end portions in the axial direction. The elastic body 13 is vulcanized and bonded to the outer peripheral surface of the inner mounting member 11. On the other hand, the outer cylinder 12 is elastically connected to the inner attachment member 11 by being externally fitted to the elastic body 13.

弾性体１３の外周面において、内側取付け部材１１を径方向に挟む両側に位置する部分に、径方向の内方に向けて窪み液室を画成する窪み部１４が各別に形成されている。２つの窪み部１４は、互いに同形同大とされるとともに、径方向の外側から見た弾性体１３の側面視で周方向に長い長方形状をなしている。
ここで、内側取付け部材１１の膨出部１１ａが、２つの窪み部１４の内面の一部を画成している。この膨出部１１ａの外周面に弾性被膜１１ｂが配設されている。弾性被膜１１ｂは、ゴム材料で形成され弾性体１３と一体に形成されている。 On the outer peripheral surface of the elastic body 13, recessed portions 14 that define the recessed liquid chambers are formed in respective portions located on both sides of the inner mounting member 11 in the radial direction so as to define a recessed liquid chamber. The two recessed portions 14 have the same shape and the same size, and have a rectangular shape that is long in the circumferential direction in a side view of the elastic body 13 viewed from the outside in the radial direction.
Here, the bulging portion 11 a of the inner mounting member 11 defines a part of the inner surface of the two recessed portions 14. An elastic coating 11b is disposed on the outer peripheral surface of the bulging portion 11a. The elastic coating 11b is formed of a rubber material and is formed integrally with the elastic body 13.

図示の例では、弾性体１３の外周面に、窪み部１４の内部同士を連通する連通溝１５が形成されている。連通溝１５は、弾性体１３において、２つの窪み部１４同士の間に位置する２つの周方向部分１３ａ、１３ｂのうち、一方の周方向部分１３ａの外周面に形成されている。連通溝１５は、一方の周方向部分１３ａの外周面における周方向の全長にわたって延在している。連通溝１５は、弾性体１３と一体に形成されるとともに、径方向の外側に向けて突出した一対の立ち上がり壁により画成されている。連通溝１５は、弾性体１３の外周面における軸方向の中央部に配設されている。   In the illustrated example, a communication groove 15 is formed on the outer peripheral surface of the elastic body 13 to communicate the insides of the recessed portions 14 with each other. The communication groove 15 is formed on the outer peripheral surface of one circumferential portion 13a of the two circumferential portions 13a and 13b located between the two depressions 14 in the elastic body 13. The communication groove 15 extends over the entire length in the circumferential direction on the outer circumferential surface of one circumferential portion 13a. The communication groove 15 is formed integrally with the elastic body 13 and is defined by a pair of rising walls protruding outward in the radial direction. The communication groove 15 is disposed in the central portion in the axial direction on the outer peripheral surface of the elastic body 13.

弾性体１３内には補強体１６が埋設されている。
補強体１６は、弾性体１３における軸方向の両端部に各別に配設されるとともに、全周にわたって延びる補強リング１６ａと、弾性体１３の前記２つの周方向部分１３ａ、１３ｂにおける軸方向の中間部において補強リング１６ａよりも径方向の内側に位置する部分に配設された補強板１６ｂと、を備えている。なお、これらの補強リング１６ａおよび補強板１６ｂは、例えば金属材料等で一体に形成されている。 A reinforcing body 16 is embedded in the elastic body 13.
The reinforcing bodies 16 are separately disposed at both ends of the elastic body 13 in the axial direction. The reinforcing rings 16a extend over the entire circumference, and the axially intermediate portions of the two circumferential portions 13a and 13b of the elastic body 13. And a reinforcing plate 16b disposed in a portion located radially inward of the reinforcing ring 16a. The reinforcing ring 16a and the reinforcing plate 16b are integrally formed of, for example, a metal material.

各窪み部１４に、被覆部材１７が各別に嵌合されることにより、該窪み部１４が径方向の外側から覆われて液室が画成されている。被覆部材１７は、弾性体１３を形成する材質より硬質の、例えば合成樹脂材料等で形成されている。
被覆部材１７の内周面には、径方向の内側に向けて突出するストッパ突部２０が形成されている。ストッパ突部２０は、被覆部材１７の内周面において、周方向の両端部、および軸方向の両端部を除く全域にわたって配置されている。ストッパ突部２０の内周面は、図２に示されるような縦断面視で径方向の外側に向けて窪む曲面状に形成されている。ストッパ突部２０における軸方向の中央部と、内側取付け部材１１の膨出部１１ａにおける軸方向の中央部と、は径方向で互いに対向している。ストッパ突部２０の軸方向の長さは、膨出部１１ａの軸方向の長さと比べて同等か、わずかに短くなっている。 When the covering member 17 is fitted to each depression 14, the depression 14 is covered from the outside in the radial direction to define a liquid chamber. The covering member 17 is made of, for example, a synthetic resin material that is harder than the material forming the elastic body 13.
A stopper protrusion 20 is formed on the inner peripheral surface of the covering member 17 so as to protrude inward in the radial direction. The stopper protrusion 20 is disposed on the inner peripheral surface of the covering member 17 over the entire area excluding both ends in the circumferential direction and both ends in the axial direction. The inner peripheral surface of the stopper protrusion 20 is formed in a curved shape that is recessed outward in the radial direction in a longitudinal sectional view as shown in FIG. The central portion in the axial direction of the stopper protrusion 20 and the central portion in the axial direction of the bulging portion 11a of the inner mounting member 11 are opposed to each other in the radial direction. The length of the stopper protrusion 20 in the axial direction is equal to or slightly shorter than the length of the bulging portion 11a in the axial direction.

被覆部材１７の外周面には、各液室同士を連通する接続溝１９が形成されている。図示の例では、被覆部材１７に、径方向に貫通する連通開口１８が形成されており、接続溝１９は、連通開口１８と弾性体１３の連通溝１５とを接続している。なお、弾性体１３に連通溝１５を形成せず、２つの被覆部材１７における各接続溝１９同士を直結してもよい。   On the outer peripheral surface of the covering member 17, a connection groove 19 that communicates the liquid chambers is formed. In the illustrated example, a communication opening 18 penetrating in the radial direction is formed in the covering member 17, and the connection groove 19 connects the communication opening 18 and the communication groove 15 of the elastic body 13. The connecting grooves 19 in the two covering members 17 may be directly connected to each other without forming the communication grooves 15 in the elastic body 13.

本実施形態では、連通開口１８は、図３および図４に示されるように、被覆部材１７における周方向の両端部のうち、連通溝１５に隣接する一方側の端部に形成されている。連通開口１８は、被覆部材１７における軸方向の一方側の端部に位置している。
接続溝１９は、連通開口１８から周方向の他方側に向けて延びる第１溝１９ａと、被覆部材１７において第１溝１９ａより軸方向の他方側に位置する部分に形成され、連通溝１５から周方向の他方側に向けて延びる第２溝１９ｂと、これらの両溝１９ａ、１９ｂにおける周方向の他方側の端部同士を連結する第３溝１９ｃと、を備えている。
２つの被覆部材１７は、互いに同形同大に形成され、軸方向の向きを互いに逆向きにした状態で、各窪み部１４に嵌合されている。 In this embodiment, as shown in FIGS. 3 and 4, the communication opening 18 is formed at one end of the covering member 17 adjacent to the communication groove 15 in both circumferential ends. The communication opening 18 is located at one end of the covering member 17 in the axial direction.
The connection groove 19 is formed in a first groove 19 a extending from the communication opening 18 toward the other side in the circumferential direction, and a portion of the covering member 17 positioned on the other side in the axial direction from the first groove 19 a. A second groove 19b extending toward the other side in the circumferential direction and a third groove 19c for connecting the ends on the other side in the circumferential direction in both the grooves 19a and 19b are provided.
The two covering members 17 are formed in the same shape and the same size, and are fitted in the respective recessed portions 14 in a state where the axial directions are opposite to each other.

被覆部材１７における周方向の他方側の端部には、周方向の外側に向けて突出する係止突部１７ａが形成されている。係止突部１７ａは、径方向の外側から見て軸方向に長い長方形状を呈し、被覆部材１７における軸方向の中央部に位置している。
弾性体１３における前記２つの周方向部分１３ａ、１３ｂのうち、連通溝１５の形成されていない他方の周方向部分１３ｂの外周面における周方向の両端部には、窪み部１４に連通し、被覆部材１７の係止突部１７ａが嵌合される係止凹部１３ｃが形成されている。 A locking projection 17a that protrudes outward in the circumferential direction is formed at the other end of the covering member 17 in the circumferential direction. The locking projection 17 a has a rectangular shape that is long in the axial direction when viewed from the outside in the radial direction, and is located in the central portion of the covering member 17 in the axial direction.
Of the two circumferential portions 13a and 13b of the elastic body 13, both ends in the circumferential direction on the outer circumferential surface of the other circumferential portion 13b where the communication groove 15 is not formed communicate with the recess 14 to cover the outer circumferential surface. A locking recess 13c into which the locking projection 17a of the member 17 is fitted is formed.

以上の構成において、外筒１２が、弾性体１３および被覆部材１７に一体に外嵌することによって、外筒１２と内側取付け部材１１とが弾性的に連結されるとともに、連通溝１５、連通開口１８および接続溝１９と外筒１２の内周面との間に、各液室同士を連通するオリフィス通路が画成されている。
そして、この防振装置１に振動が入力されたときに、弾性体１３が弾性変形しつつ、各液室の内容積が変動することで、液室内の液体がオリフィス通路を流通して液柱共振を生じさせることにより振動が減衰、吸収される。 In the above configuration, the outer cylinder 12 is integrally fitted to the elastic body 13 and the covering member 17 so that the outer cylinder 12 and the inner mounting member 11 are elastically connected, and the communication groove 15 and the communication opening are formed. 18 and the connecting groove 19 and the inner peripheral surface of the outer cylinder 12 define an orifice passage that communicates the liquid chambers.
When vibration is input to the vibration isolator 1, the elastic body 13 is elastically deformed, and the internal volume of each liquid chamber varies, so that the liquid in the liquid chamber flows through the orifice passage and the liquid column. By causing resonance, vibration is attenuated and absorbed.

そして本実施形態では、被覆部材１７において、径方向の外側を向く外周面のうちの少なくとも接続溝１９の開口周縁部に、外筒１２の内周面に弾性変形させられた状態で当接する第１シール弾性膜２１が配設されるとともに、径方向の内側を向く内周面に、内側取付け部材１１および外筒１２が相対的に径方向に接近移動したときに、内側取付け部材１１が当接するストッパ弾性膜２２が配設されている。   In the present embodiment, the covering member 17 is in contact with at least the opening peripheral portion of the connection groove 19 in the outer peripheral surface facing radially outward in the state of being elastically deformed to the inner peripheral surface of the outer cylinder 12. 1 seal elastic membrane 21 is disposed, and when the inner mounting member 11 and the outer cylinder 12 move relatively closer to the inner peripheral surface facing the inner side in the radial direction, the inner mounting member 11 is pressed against the inner peripheral surface. A stopper elastic film 22 is provided in contact therewith.

第１シール弾性膜２１は、被覆部材１７の外周面において、接続溝１９の内面を除く全域にわたって配設されている。なお、第１シール弾性膜２１を、接続溝１９の内面に配設してもよい。
ストッパ弾性膜２２は、被覆部材１７のストッパ突部２０の内周面における全域にわたって配設されている。ストッパ弾性膜２２と、内側取付け部材１１の膨出部１１ａに配設された弾性被膜１１ｂと、がそれぞれ、軸方向の全長にわたって径方向で互いに対向している。ストッパ弾性膜２２と弾性被膜１１ｂとの径方向の隙間は、軸方向の全長にわたって同等になっている。弾性被膜１１ｂは、第１シール弾性膜２１、およびストッパ弾性膜２２より薄肉に形成されている。 The first seal elastic film 21 is disposed on the entire outer surface of the covering member 17 except for the inner surface of the connection groove 19. The first seal elastic film 21 may be disposed on the inner surface of the connection groove 19.
The stopper elastic film 22 is disposed over the entire area of the inner peripheral surface of the stopper protrusion 20 of the covering member 17. The stopper elastic film 22 and the elastic coating 11b disposed on the bulging portion 11a of the inner mounting member 11 are opposed to each other in the radial direction over the entire length in the axial direction. The radial gap between the stopper elastic film 22 and the elastic film 11b is the same over the entire length in the axial direction. The elastic coating 11 b is formed thinner than the first seal elastic film 21 and the stopper elastic film 22.

被覆部材１７において、軸方向の両側を向く両端面には、弾性体１３における窪み部１４の内面に、弾性変形させられた状態で当接する第２シール弾性膜２３が配設されている。第２シール弾性膜２３は、弾性被膜１１ｂより厚肉に形成されている。
そして、これらの第１シール弾性膜２１、ストッパ弾性膜２２、および第２シール弾性膜２３は、例えば熱可塑性エラストマー、若しくはゴム材料等の弾性材料で一体に形成されている。図示の例では、被覆部材１７は、この弾性材料により、接続溝１９の内面を除く全域にわたって被覆されている。弾性材料は、被覆部材１７における周方向の外側を向く周端面も被覆している。
なお、被覆部材１７に径方向に貫く貫通孔を形成し、この貫通孔を通して第１シール弾性膜２１とストッパ弾性膜２２とを連結することで、第１シール弾性膜２１およびストッパ弾性膜２２を一体に形成してもよい。
ここで、前記弾性材料が、熱可塑性エラストマーの場合には、２色成形により被覆部材１７とともに、第１シール弾性膜２１、ストッパ弾性膜２２、および第２シール弾性膜２３を形成することが可能になり、製造コストを低減することができる。 In the covering member 17, second seal elastic films 23 that are in contact with the inner surface of the recess 14 in the elastic body 13 in an elastically deformed state are disposed on both end surfaces facing both sides in the axial direction. The second seal elastic film 23 is formed thicker than the elastic film 11b.
The first seal elastic film 21, the stopper elastic film 22, and the second seal elastic film 23 are integrally formed of an elastic material such as a thermoplastic elastomer or a rubber material. In the illustrated example, the covering member 17 is covered with the elastic material over the entire region except the inner surface of the connection groove 19. The elastic material also covers the peripheral end surface of the covering member 17 facing the outer side in the circumferential direction.
A through-hole penetrating in the radial direction is formed in the covering member 17, and the first seal elastic film 21 and the stopper elastic film 22 are connected by connecting the first seal elastic film 21 and the stopper elastic film 22 through the through-hole. You may form integrally.
Here, when the elastic material is a thermoplastic elastomer, the first seal elastic film 21, the stopper elastic film 22, and the second seal elastic film 23 can be formed together with the covering member 17 by two-color molding. Thus, the manufacturing cost can be reduced.

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、被覆部材１７の外周面に第１シール弾性膜２１が配設されているので、外筒１２の内周面に弾性被膜を配設しなくても、接続溝１９と外筒１２の内周面との間に画成されたオリフィス通路の液密性を確保することができる。
また、被覆部材１７の内周面にストッパ弾性膜２２が配設されているので、内側取付け部材１１および外筒１２が相対的に径方向に接近移動したときに、内側取付け部材１１が被覆部材１７の内周面に直に当接することが防止され、防振装置１に生ずる衝撃力を抑えることが可能になり、この防振装置１の耐久性を向上させることができる。
また、内側取付け部材１１の外周面のうち、窪み部１４の内面の一部を画成する膨出部１１ａに配設された弾性被膜１１ｂが、内側取付け部材１１および外筒１２が相対的に径方向に接近移動したときに、被覆部材１７の内周面にストッパ弾性膜２２を介して当接することとなり、弾性被膜１１ｂの耐久性を確保することができる。 As described above, according to the vibration isolator 1 according to the present embodiment, since the first seal elastic film 21 is disposed on the outer peripheral surface of the covering member 17, the elastic film is applied to the inner peripheral surface of the outer cylinder 12. Even if it is not provided, the liquid tightness of the orifice passage defined between the connection groove 19 and the inner peripheral surface of the outer cylinder 12 can be ensured.
Further, since the stopper elastic film 22 is disposed on the inner peripheral surface of the covering member 17, when the inner mounting member 11 and the outer cylinder 12 move relatively close to each other in the radial direction, the inner mounting member 11 is covered with the covering member. The direct contact with the inner peripheral surface of the vibration isolator 17 is prevented, and the impact force generated in the vibration isolator 1 can be suppressed, and the durability of the vibration isolator 1 can be improved.
In addition, the elastic coating 11b disposed on the bulging portion 11a that defines a part of the inner surface of the recessed portion 14 in the outer peripheral surface of the inner mounting member 11 is relatively positioned so that the inner mounting member 11 and the outer cylinder 12 are relatively positioned. When approaching in the radial direction, it comes into contact with the inner peripheral surface of the covering member 17 via the stopper elastic film 22, and the durability of the elastic film 11b can be ensured.

また、被覆部材１７における軸方向の両端面に第２シール弾性膜２３が配設されているので、液室内の液密性を向上させることが可能になり、防振性能を安定して発揮させることができる。
また、第１シール弾性膜２１、ストッパ弾性膜２２、および第２シール弾性膜２３が一体に形成されているので、製造コストを抑えつつ、オリフィス通路の液密性、および耐久性を容易かつ確実に確保することが可能な防振装置１が得られる。 Further, since the second seal elastic film 23 is disposed on both end surfaces of the covering member 17 in the axial direction, it is possible to improve the liquid tightness in the liquid chamber, and to stably exhibit the vibration proof performance. be able to.
In addition, since the first seal elastic film 21, the stopper elastic film 22, and the second seal elastic film 23 are integrally formed, the liquid tightness and durability of the orifice passage can be easily and reliably reduced while reducing the manufacturing cost. Thus, the vibration isolator 1 that can be ensured in the first place is obtained.

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。   The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

例えば前記実施形態では、被覆部材１７に第２シール弾性膜２３を配設したが、第２シール弾性膜２３を配設しなくてもよい。
また、内側取付け部材１１の外周面のうち、窪み部１４の内面の一部を画成する部分に、弾性被膜１１ｂを配設しなくてもよいし、膨出部１１ａを形成しなくてもよい。 For example, in the above embodiment, the second seal elastic film 23 is disposed on the covering member 17, but the second seal elastic film 23 may not be disposed.
Moreover, it is not necessary to provide the elastic coating 11b in the part which defines a part of inner surface of the hollow part 14 among the outer peripheral surfaces of the inner side attachment member 11, and it is not necessary to form the bulging part 11a. Good.

その他、本発明の趣旨を逸脱しない範囲で、前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、前記した変形例を適宜組み合わせてもよい。   In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the gist of the present invention, and the above-described modified examples may be appropriately combined.

１ 防振装置
１１ 内側取付け部材
１２ 外筒
１３ 弾性体
１４ 窪み部
１７ 被覆部材
１９ 接続溝
２１ 第１シール弾性膜
２２ ストッパ弾性膜
２３ 第２シール弾性膜
Ｏ 中心軸線 DESCRIPTION OF SYMBOLS 1 Anti-vibration device 11 Inner attachment member 12 Outer cylinder 13 Elastic body 14 Depression part 17 Cover member 19 Connection groove 21 1st sealing elastic film 22 Stopper elastic film 23 2nd sealing elastic film O Center axis

Claims (3)

振動発生部および振動受部のうちのいずれか一方に連結される内側取付け部材、および他方に連結されるとともに、前記内側取付け部材を径方向の外側から囲繞する外筒と、
前記内側取付け部材と前記外筒とを弾性的に連結する弾性体と、を備え、
前記弾性体の外周面において、前記内側取付け部材を径方向に挟む両側に位置する部分に、径方向の内方に向けて窪む窪み部が各別に形成され、
各前記窪み部に、被覆部材が各別に嵌合されることにより、前記窪み部が径方向の外側から覆われて液室が画成され、
各前記被覆部材の外周面には、各前記液室同士を連通する接続溝が形成され、
前記外筒が、前記弾性体および前記被覆部材に一体に外嵌することによって、前記外筒と前記内側取付け部材とが弾性的に連結されるとともに、前記接続溝と前記外筒の内周面との間に、各前記液室同士を連通するオリフィス通路が画成され、
前記被覆部材において、外周面における少なくとも前記接続溝の開口周縁部には、前記外筒の内周面に弾性変形させられた状態で当接する第１シール弾性膜が配設されるとともに、内周面には、前記内側取付け部材および前記外筒が相対的に径方向に接近移動したときに、前記内側取付け部材が当接するストッパ弾性膜が配設されていることを特徴とする防振装置。 An inner mounting member connected to one of the vibration generating portion and the vibration receiving portion, and an outer cylinder connected to the other and surrounding the inner mounting member from the outside in the radial direction;
An elastic body that elastically connects the inner mounting member and the outer cylinder,
On the outer peripheral surface of the elastic body, in the portions located on both sides sandwiching the inner mounting member in the radial direction, a hollow portion that is recessed inward in the radial direction is formed separately,
By fitting a covering member into each of the depressions, the depression is covered from the outside in the radial direction to define a liquid chamber,
On the outer peripheral surface of each of the covering members, a connection groove that connects the liquid chambers is formed,
When the outer cylinder is integrally fitted to the elastic body and the covering member, the outer cylinder and the inner mounting member are elastically coupled, and the connection groove and the inner peripheral surface of the outer cylinder And an orifice passage communicating each of the liquid chambers is defined between
In the covering member, at least an opening peripheral portion of the connection groove on the outer peripheral surface is provided with a first seal elastic film that is in contact with the inner peripheral surface of the outer cylinder while being elastically deformed, and An anti-vibration device according to claim 1, wherein a stopper elastic film is disposed on the surface so that the inner mounting member comes into contact with the inner mounting member and the outer cylinder when they move relatively close to each other in the radial direction. 前記被覆部材において、前記外筒の中心軸線に沿う軸方向の両側を向く両端面には、前記弾性体における前記窪み部の内面に、弾性変形させられた状態で当接する第２シール弾性膜が配設されていることを特徴とする請求項１に記載の防振装置。   In the covering member, on both end faces facing the axial direction along the central axis of the outer cylinder, there are second seal elastic membranes that are in elastically deformed contact with the inner surface of the recess in the elastic body. The vibration isolator according to claim 1, wherein the vibration isolator is disposed. 前記第１シール弾性膜、前記ストッパ弾性膜、および前記第２シール弾性膜は、一体に形成されていることを特徴とする請求項２に記載の防振装置。   The vibration isolator according to claim 2, wherein the first seal elastic film, the stopper elastic film, and the second seal elastic film are integrally formed.
JP2015215677A 2015-11-02 2015-11-02 Vibration isolator Active JP6577835B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015215677A JP6577835B2 (en) 2015-11-02 2015-11-02 Vibration isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015215677A JP6577835B2 (en) 2015-11-02 2015-11-02 Vibration isolator

Publications (2)

Publication Number Publication Date
JP2017089662A true JP2017089662A (en) 2017-05-25
JP6577835B2 JP6577835B2 (en) 2019-09-18

Family

ID=58771422

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015215677A Active JP6577835B2 (en) 2015-11-02 2015-11-02 Vibration isolator

Country Status (1)

Country Link
JP (1) JP6577835B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7420689B2 (en) 2020-10-12 2024-01-23 株式会社プロスパイラ Vibration isolator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7420689B2 (en) 2020-10-12 2024-01-23 株式会社プロスパイラ Vibration isolator

Also Published As

Publication number Publication date
JP6577835B2 (en) 2019-09-18

Similar Documents

Publication Publication Date Title
JP6422179B2 (en) Liquid-filled bush
JP5919129B2 (en) Vibration isolator
WO2019216403A1 (en) Vibration damping device
JP6577835B2 (en) Vibration isolator
JP6338448B2 (en) Liquid-filled vibration isolator
JP5759122B2 (en) Vibration isolator
JP2019086099A (en) Vibration controller
JP3763024B1 (en) Liquid-filled vibration isolator
WO2020129367A1 (en) Liquid seal bushing
JP2021032367A (en) Liquid seal bush
JP7420689B2 (en) Vibration isolator
JP2021032369A (en) Liquid seal bush
JP6431738B2 (en) Fluid filled cylindrical vibration isolator
JP7383593B2 (en) Vibration isolator
JP7424954B2 (en) Vibration isolator
WO2021039890A1 (en) Liquid sealing bush
JP7500385B2 (en) Anti-vibration device
JP2022152163A (en) Fluid-sealed type cylindrical vibration isolator
JP2008240955A (en) Antivibration device
JP6797074B2 (en) Anti-vibration device
JP2021032370A (en) Liquid seal bush
JP2016075323A (en) Antivibration device
JP2008133854A (en) Vibration control device
JP2024000660A (en) Vibration proof device
JP6141707B2 (en) Vibration isolator

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20180702

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20181019

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20190411

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190423

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190606

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20190806

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20190823

R150 Certificate of patent or registration of utility model

Ref document number: 6577835

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313111

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250