JP6562663B2 - Vibration isolator - Google Patents

Vibration isolator Download PDF

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JP6562663B2
JP6562663B2 JP2015049372A JP2015049372A JP6562663B2 JP 6562663 B2 JP6562663 B2 JP 6562663B2 JP 2015049372 A JP2015049372 A JP 2015049372A JP 2015049372 A JP2015049372 A JP 2015049372A JP 6562663 B2 JP6562663 B2 JP 6562663B2
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elastic body
mounting member
stopper elastic
vibration
outer mounting
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JP2016169785A (en
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晃大 齋藤
晃大 齋藤
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Bridgestone 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、例えば自動車用エンジンのエンジンマウントとして用いられる防振装置が知られている。このような防振装置の一例として、内筒と、この周囲に配置された外筒と、これらを連結するゴム部材とよりなり、前記ゴム部材の周方向における少なくとも１箇所に軸方向に貫通するすぐり部が形成され、このすぐり部の中に配設された、内筒と外筒との半径方向の相対変位を制限する弾性ストッパと、内筒の軸方向外側の少なくとも一方に配設された、外筒と内筒との軸方向の相対変位を制限する剛性ストッパとを具えてなる防振装置（特許文献１参照）がある。   Conventionally, for example, a vibration isolator used as an engine mount of an automobile engine is known. As an example of such a vibration isolator, an inner cylinder, an outer cylinder disposed around the inner cylinder, and a rubber member that couples the inner cylinder, and penetrates in the axial direction at at least one place in the circumferential direction of the rubber member. A curb portion is formed and disposed in the curb portion, an elastic stopper for restricting the relative displacement in the radial direction between the inner tube and the outer tube, and at least one of the inner tube on the outer side in the axial direction. There is a vibration isolator (see Patent Document 1) that includes a rigid stopper that limits the relative displacement in the axial direction between the outer cylinder and the inner cylinder.

この防振装置の、内筒の軸方向両端にはそれぞれ剛性ストッパが取り付けられており、外筒の軸方向一端の外向フランジ及び他端に、それぞれ軸方向外方に突出して設けられた緩衝ゴムが、それぞれ剛性ストッパに当たることにより、内筒と外筒との軸方向相対変位を制限することができる。   In this vibration isolator, rigid stoppers are attached to both ends of the inner cylinder in the axial direction, and shock absorber rubbers are provided to protrude outward in the axial direction at the outer flange and one end of the outer cylinder in the axial direction, respectively. However, the respective axial displacements of the inner cylinder and the outer cylinder can be limited by hitting the rigid stoppers.

特開２０１０−１９６０号公報JP 2010-1960 A

ところで、例えば、ストッパ機能の向上のために緩衝ゴムの剛性を高めようとした場合、緩衝ゴムの剛性は、その体積に応じて決定されることから、緩衝ゴムの体積を多くする必要があった。一方、緩衝ゴムの体積を変えずに剛性を高めようとすれば、それ自体を剛性の高い材質のものにする必要があった。   By the way, for example, when trying to increase the rigidity of the buffer rubber in order to improve the stopper function, the rigidity of the buffer rubber is determined according to the volume thereof, so it is necessary to increase the volume of the buffer rubber. . On the other hand, in order to increase the rigidity without changing the volume of the buffer rubber, it is necessary to make the material itself a highly rigid material.

しかしながら、緩衝ゴムの設置場所においては、その体積を広くすることができない場合があり、また、緩衝ゴム自体を剛性の高い材質のものにしようとすれば、コスト高を招いてしまうこともある。そのため、緩衝ゴムの体積や材質を変えること無く、緩衝ゴムの剛性を変えることなく剛性ストッパの硬さを調整可能とすることが望まれている。
そこで、この発明の目的は、外筒のフランジ部に形成されるストッパ弾性体の剛性を変えることなく、ストッパ弾性体の硬さを必要に応じて調整することができる防振装置を提供することである。 However, there are cases where the volume of the buffer rubber cannot be increased at the place where the buffer rubber is installed, and if the buffer rubber itself is made of a highly rigid material, the cost may be increased. Therefore, it is desired that the hardness of the rigid stopper can be adjusted without changing the volume and material of the buffer rubber and without changing the rigidity of the buffer rubber.
Accordingly, an object of the present invention is to provide a vibration isolator capable of adjusting the hardness of the stopper elastic body as necessary without changing the rigidity of the stopper elastic body formed on the flange portion of the outer cylinder. It is.

上記目的を達成するため、この発明に係る防振装置は、振動発生部及び振動受部のいずれか一方に連結される筒状の外側取付部材と、前記振動発生部及び前記振動受部の他方に連結される内側取付部材と、前記外側取付部材及び前記内側取付部材を弾性的に連結する本体弾性体と、を有し、前記外側取付部材の軸方向一端部には、径方向に延びるフランジ部が設けられ、前記フランジ部には、前記外側取付部材の軸方向外方に突出するストッパ弾性体が設けられると共に、該ストッパ弾性体の前記外側取付部材の径方向少なくとも一方端側に配置される規制部が形成されたことを特徴とする。この発明に係る防振装置によれば、外筒のフランジ部に形成されるストッパ弾性体の剛性を変えることなく、ストッパ弾性体の硬さを必要に応じて調整することができる。   In order to achieve the above object, a vibration isolator according to the present invention includes a cylindrical outer mounting member connected to one of a vibration generating portion and a vibration receiving portion, and the other of the vibration generating portion and the vibration receiving portion. A flange that extends in a radial direction at one axial end of the outer mounting member. The flange portion is provided with a stopper elastic body that protrudes outward in the axial direction of the outer mounting member, and is disposed on at least one end side in the radial direction of the outer mounting member of the stopper elastic body. It is characterized in that a regulating part is formed. According to the vibration isolator which concerns on this invention, the hardness of a stopper elastic body can be adjusted as needed, without changing the rigidity of the stopper elastic body formed in the flange part of an outer cylinder.

この発明の防振装置では、前記フランジ部は、前記外側取付部材の軸方向一端部で径方向外方に延び、前記規制部は、前記フランジ部の、前記外側取付部材の径方向外方端側に配置されることが好ましい。この構成によれば、ストッパ弾性体の硬さをより調整し易くなる。
この発明の防振装置では、前記規制部は、前記外側取付部材の軸方向外方に向かうに従い径方向外側に傾斜する傾斜面を有することが好ましい。この構成によれば、ストッパ弾性体の硬さをより調整し易くなる。
この発明の防振装置では、前記規制部と前記ストッパ弾性体との間には、前記外側取付部材の軸方向内方に向かって凹む窪み部が形成されていることが好ましい。この構成によれば、ストッパ弾性体の耐久性を調整することができる。 In the vibration isolator of the present invention, the flange portion extends radially outward at one axial end portion of the outer mounting member, and the restricting portion is a radially outer end of the flange mounting portion of the outer mounting member. It is preferable to arrange on the side. According to this configuration, it becomes easier to adjust the hardness of the stopper elastic body.
In the vibration isolator of the present invention, it is preferable that the restricting portion has an inclined surface that inclines radially outward as it goes outward in the axial direction of the outer mounting member. According to this configuration, it becomes easier to adjust the hardness of the stopper elastic body.
In the vibration isolator according to the present invention, it is preferable that a recess that is recessed inward in the axial direction of the outer mounting member is formed between the restricting portion and the stopper elastic body. According to this configuration, the durability of the stopper elastic body can be adjusted.

この発明によれば、外筒のフランジ部に形成されるストッパ弾性体の剛性を変えることなく、ストッパ弾性体の硬さを必要に応じて調整することができる防振装置を提供することができる。   According to the present invention, it is possible to provide a vibration isolator capable of adjusting the hardness of the stopper elastic body as necessary without changing the rigidity of the stopper elastic body formed on the flange portion of the outer cylinder. .

この発明の第１実施形態に係る防振装置の構成の一部を示す、断面図である。It is sectional drawing which shows a part of structure of the vibration isolator which concerns on 1st Embodiment of this invention. この発明の第２実施形態に係る防振装置のストッパ弾性体の周辺を拡大して示す、断面図である。It is sectional drawing which expands and shows the periphery of the stopper elastic body of the vibration isolator which concerns on 2nd Embodiment of this invention. この発明の第３実施形態に係る防振装置のストッパ弾性体の周辺を拡大して示し、（ａ）は窪み部の一例を示す断面図、（ｂ）は窪み部の他の例を示す断面図である。The periphery of the stopper elastic body of the vibration isolator according to the third embodiment of the present invention is shown in an enlarged manner, (a) is a cross-sectional view showing an example of a dent, and (b) is a cross section showing another example of the dent. FIG.

以下、この発明を実施するための形態について、図面を参照して例示説明する。
この発明に係る防振装置は、例えば自動車のエンジンマウントやサスペンションブッシュ等に用いられ、振動を発生する振動発生部と振動を受ける振動受部との間に配置されて、振動発生部で発生した振動が振動受部に伝達するのを防止する。 DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
The vibration isolator according to the present invention is used, for example, in an engine mount or a suspension bush of an automobile, and is disposed between a vibration generating unit that generates vibration and a vibration receiving unit that receives vibration, and is generated in the vibration generating unit. Prevents vibration from being transmitted to the vibration receiver.

（第１実施形態）
図１に示すように、第１実施形態の防振装置１０は、振動発生部（図示しない）及び振動受部（図示しない）のいずれか一方に連結される外筒（筒状の外側取付部材）１１と、外筒１１の内側に配置され、振動発生部及び振動受部の他方に連結される内筒（内側取付部材）１２と、外筒１１及び内筒１２を弾性的に連結する本体弾性体１３と、を有している。 (First embodiment)
As shown in FIG. 1, the vibration isolator 10 of the first embodiment includes an outer cylinder (cylindrical outer mounting member) coupled to one of a vibration generating part (not shown) and a vibration receiving part (not shown). ) 11, an inner cylinder (inner mounting member) 12 that is arranged inside the outer cylinder 11 and is connected to the other of the vibration generating part and the vibration receiving part, and a main body that elastically connects the outer cylinder 11 and the inner cylinder 12. And an elastic body 13.

本実施形態に係る、外筒１１及び内筒１２は、外筒１１の内側に内筒１２が配置できるように、外筒１１の内径が内筒１２の外径より大きい、円筒体により形成されている。本体弾性体１３は、例えば、天然ゴム（ＮＲ）や合成ゴム（一例として、クロロプレンゴム（ＣＲ））等のゴム材料により、外筒１１と内筒１２の離間空間に収納される円筒体状に形成されており、この例では加硫接着により、外筒１１及び内筒１２に取り付けられている。この本体弾性体１３には、軸方向に沿って貫通するすぐり部１３ａが少なくとも周方向の一箇所設けられているが、すぐり部１３ａは設けられていなくても良い。   The outer cylinder 11 and the inner cylinder 12 according to the present embodiment are formed of a cylindrical body in which the inner diameter of the outer cylinder 11 is larger than the outer diameter of the inner cylinder 12 so that the inner cylinder 12 can be disposed inside the outer cylinder 11. ing. The main body elastic body 13 is formed into a cylindrical body that is accommodated in a space between the outer cylinder 11 and the inner cylinder 12 by a rubber material such as natural rubber (NR) or synthetic rubber (chloroprene rubber (CR) as an example). In this example, it is attached to the outer cylinder 11 and the inner cylinder 12 by vulcanization adhesion. The main body elastic body 13 is provided with at least one circumferential portion 13a penetrating along the axial direction. However, the straight portion 13a may not be provided.

外筒１１の軸方向一端部には、端部全周にわたって、外筒１１の径方向に延びる（この例では、外筒１１の径方向外方に伸びる外向きの）フランジ部１４が設けられており、フランジ部１４には、その外筒１１の軸方向外方の外表面上に、外筒１１の軸方向外方に突出するストッパ弾性体１５が設けられると共に、ゴム材質のストッパ弾性体１５の、外筒１１の径方向少なくとも一方端側（この例では、外方端側）に配置される規制部１６が形成されている。   At one axial end portion of the outer cylinder 11, a flange portion 14 extending in the radial direction of the outer cylinder 11 (in this example, extending outward in the radial direction of the outer cylinder 11) is provided over the entire circumference of the end portion. The flange portion 14 is provided with a stopper elastic body 15 protruding outward in the axial direction of the outer cylinder 11 on the outer surface of the outer cylinder 11 in the axial direction, and a rubber stopper elastic body. 15, a restricting portion 16 is formed which is disposed on at least one end side in the radial direction of the outer cylinder 11 (in this example, on the outer end side).

ストッパ弾性体１５は、フランジ部１４の全周にわたって、フランジ部１４に載置されるように、この例では、本体弾性体１３と一体の円環状に形成されて設けられている。なお、ストッパ弾性体１５は、例えば、本体弾性体１３と同様のゴム材料により、本体弾性体１３とは別体の円環状に形成されていても良い。   In this example, the stopper elastic body 15 is provided to be formed in an annular shape integral with the main body elastic body 13 so as to be placed on the flange portion 14 over the entire circumference of the flange portion 14. The stopper elastic body 15 may be formed in an annular shape separate from the main body elastic body 13 by using, for example, the same rubber material as that of the main body elastic body 13.

規制部１６は、例えば、鉄、アルミニウム等の金属や樹脂からなる剛性部材を用いて、フランジ部１４の、外筒１１の径方向外方端側に配置されて、例えば、外筒１１のフランジ部１４と一体に絞り加工により、フランジ部１４の曲げ部として縦壁状に形成されており、フランジ部１４の外周縁に、全周にわたって、フランジ部１４から外筒１１の軸方向外方へ突出している。この規制部１６に対し、ストッパ弾性体１５は、その外周面を接触させると共に、突出端１５ａを規制部１６の突出端１６ａより外筒１１の軸方向外方に離間して、即ち、規制部１６より高く、位置させている。
本実施形態において、本体弾性体１３、ストッパ弾性体１５は、外筒１１、フランジ部１４、規制部１６に加硫接着されている。 The restricting portion 16 is disposed on the radially outer end side of the outer cylinder 11 of the flange portion 14 using, for example, a rigid member made of a metal such as iron or aluminum or a resin. It is formed in a vertical wall shape as a bent portion of the flange portion 14 by drawing together with the portion 14, and on the outer peripheral edge of the flange portion 14 from the flange portion 14 to the outer side in the axial direction of the outer cylinder 11 It protrudes. The stopper elastic body 15 is brought into contact with the outer peripheral surface of the restricting portion 16, and the protruding end 15 a is separated from the protruding end 16 a of the restricting portion 16 in the axially outward direction of the outer cylinder 11, that is, the restricting portion. It is positioned higher than 16.
In this embodiment, the main body elastic body 13 and the stopper elastic body 15 are vulcanized and bonded to the outer cylinder 11, the flange portion 14, and the restriction portion 16.

なお、フランジ部１４は、外筒１１の径方向内方に延びる内向きに設けられていても良い。この場合、規制部１６は、フランジ部１４の内周縁に縦壁状に形成され、ストッパ弾性体１５は、規制部１６の外周面に接触させて規制部１６の外側（外筒１１の径方向外方）に位置する。また、ストッパ弾性体１５及び規制部１６は、フランジ部１４の周方向全周に渡って形成される場合に限るものではなく、周方向に間隙を有して断続的に形成されていても良い。   In addition, the flange part 14 may be provided inwardly extending radially inward of the outer cylinder 11. In this case, the restricting portion 16 is formed in a vertical wall shape on the inner peripheral edge of the flange portion 14, and the stopper elastic body 15 is brought into contact with the outer peripheral surface of the restricting portion 16 so as to be outside the restricting portion 16 (the radial direction of the outer cylinder 11). Located outside). The stopper elastic body 15 and the restricting portion 16 are not limited to being formed over the entire circumference in the circumferential direction of the flange portion 14, and may be formed intermittently with a gap in the circumferential direction. .

上記構成を有する防振装置１０は、振動発生部と振動受部のいずれか一方に外筒１１を、他方に内筒１２を、それぞれ連結して、振動発生部と振動受部の間に装着され、装着後、防振装置１０には、振動発生部からの振動が入力する。防振装置１０の装着に際し、外筒１１は、例えば、振動発生部であるサスペンションアーム（図示しない）等に圧入される。   The vibration isolator 10 having the above-described configuration is mounted between the vibration generating unit and the vibration receiving unit by connecting the outer cylinder 11 to one of the vibration generating unit and the vibration receiving unit and the inner cylinder 12 to the other. After the mounting, vibration from the vibration generating unit is input to the vibration isolator 10. When mounting the vibration isolator 10, the outer cylinder 11 is press-fitted into, for example, a suspension arm (not shown) that is a vibration generating unit.

例えば、サスペンションアームに外筒１１を圧入する場合、外筒１１の圧入は、フランジ部１４に形成されたストッパ弾性体１５の突出端１５ａに、突出端１５ａ対向側から治具（図示しない）を押し当てて行われる。治具の押し当て（下方移動）が進むに連れ、ストッパ弾性体１５は、押圧変形によるつぶれを拡大させるが、治具の押し当て（下方移動）は、押圧変形を続けるストッパ弾性体１５の突出端１５ａが、規制部１６の突出端１６ａに接触した時点で、停止する。   For example, when the outer cylinder 11 is press-fitted into the suspension arm, the outer cylinder 11 is press-fitted by inserting a jig (not shown) from the opposite side of the protruding end 15 a to the protruding end 15 a of the stopper elastic body 15 formed on the flange portion 14. It is done by pushing. As the pressing (downward movement) of the jig progresses, the stopper elastic body 15 expands the crush due to the pressing deformation, but the pressing (downward movement) of the jig causes the protrusion of the stopper elastic body 15 to continue the pressing deformation. When the end 15a comes into contact with the protruding end 16a of the restricting portion 16, it stops.

従って、治具のストッパ弾性体１５に対する押し当ては、規制部１６により規制されることになり、治具の押し当てが停止した時点で、治具によるストッパ弾性体１５の押圧変形によるつぶれは、それ以上進行せず、抑えられる。このため、治具の押し当てによってストッパ弾性体１５に生じる圧縮荷重は、変形が抑えられたストッパ弾性体１５により受け止められることになる。   Therefore, the pressing of the jig against the stopper elastic body 15 is regulated by the restricting portion 16, and when the jig stops being pressed, the crushing of the stopper elastic body 15 by the jig due to the press deformation is as follows. It does not progress any further and is suppressed. For this reason, the compressive load generated on the stopper elastic body 15 by the pressing of the jig is received by the stopper elastic body 15 whose deformation is suppressed.

圧縮荷重を受け止めるストッパ弾性体１５の押圧変形量（つぶれ量）は、ストッパ弾性体１５の外周面（規制部１６がフランジ部１４の内周縁に形成されている場合は、ストッパ弾性体１５の内周面）を接触させて、ストッパ弾性体１５の周囲に設けられた規制部１６の、外筒１１の軸方向外方への突出量（突出高さ）変更によって調整することができる。規制部１６の突出量を多くした場合、ストッパ弾性体１５への押圧量が少なくなるのでストッパ弾性体１５の変形量が少なくなり、規制部１６の突出量を少なくした場合、ストッパ弾性体１５への押圧量が多くなるのでストッパ弾性体１５の変形量が多くなる。
つまり、本実施形態の防振装置１０は、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部１６により、フランジ部１４に形成されるストッパ弾性体１５の硬さを必要に応じて調整することができる。 The amount of pressing deformation (crush amount) of the stopper elastic body 15 that receives the compressive load is the outer peripheral surface of the stopper elastic body 15 (in the case where the restricting portion 16 is formed on the inner peripheral edge of the flange portion 14, It is possible to adjust the amount of protrusion (protrusion height) of the restricting portion 16 provided around the stopper elastic body 15 in the axial direction outward of the outer cylinder 11 by contacting the peripheral surface). When the amount of protrusion of the restricting portion 16 is increased, the amount of pressing against the stopper elastic body 15 is reduced, so that the amount of deformation of the stopper elastic body 15 is reduced, and when the amount of protrusion of the restricting portion 16 is reduced, the stopper elastic body 15 is moved. Therefore, the amount of deformation of the stopper elastic body 15 increases.
That is, the vibration isolator 10 of the present embodiment is formed in the flange portion 14 by the restriction portion 16 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. The hardness of the stopper elastic body 15 to be applied can be adjusted as necessary.

特に、本実施形態のように、ストッパ弾性体１５を本体弾性体１３と一体に形成する場合、本実施形態の防振装置１０によれば、本体弾性体１３の剛性を高めることなく、ストッパ弾性体１５の硬さを高めることができる。この結果、本体弾性体１３自体による防振特性に影響を与えることなく、圧縮荷重を受け止めるストッパ弾性体１５のストッパ機能を向上させることができると共に、ストッパ弾性体１５に治具を押し当てながら外筒１１を、図示しないサスペンションアーム等に圧入する場合の、ストッパ弾性体１５の耐久性も向上させることができる。   In particular, when the stopper elastic body 15 is formed integrally with the main body elastic body 13 as in this embodiment, according to the vibration isolator 10 of the present embodiment, the stopper elastic body 15 does not increase the rigidity of the main body elastic body 13. The hardness of the body 15 can be increased. As a result, the stopper function of the stopper elastic body 15 that receives the compression load can be improved without affecting the vibration isolation characteristics of the main body elastic body 13 itself, and the jig can be removed while pressing the jig against the stopper elastic body 15. The durability of the stopper elastic body 15 when the cylinder 11 is press-fitted into a suspension arm or the like (not shown) can also be improved.

即ち、従来、ストッパ弾性体１５に治具を押し当てながら外筒１１を圧入する場合、ストッパ弾性体１５の変形を防止するためには、ストッパ弾性体１５それ自体の硬度を高める（硬くする）必要があり、ストッパ弾性体１５それ自体の硬度を高めると、ストッパ弾性体１５と一体の本体弾性体１３の硬度も高めることになってしまい、防振装置の特性にも影響を及ぼしていたのに対し、本願発明に係る防振装置１０にあっては、規制部１６の突出量変更によってストッパ弾性体１５の押圧変形量を調整し耐久性を向上させることができ、ストッパ弾性体１５それ自体の硬度を変更することなく外筒１１の圧入が可能になるので、ストッパ弾性体１５それ自体の硬度を考慮することなく本体弾性体１３に基づく防振装置の特性を自由に調整することができる。   That is, conventionally, when the outer cylinder 11 is press-fitted while pressing a jig against the stopper elastic body 15, in order to prevent the deformation of the stopper elastic body 15, the hardness of the stopper elastic body 15 itself is increased (hardened). When the hardness of the stopper elastic body 15 itself is increased, the hardness of the main body elastic body 13 integral with the stopper elastic body 15 is also increased, which has an influence on the characteristics of the vibration isolator. On the other hand, in the vibration isolator 10 according to the present invention, the amount of pressing deformation of the stopper elastic body 15 can be adjusted by changing the protruding amount of the restricting portion 16 to improve the durability, and the stopper elastic body 15 itself. Therefore, it is possible to freely adjust the characteristics of the vibration isolator based on the main body elastic body 13 without considering the hardness of the stopper elastic body 15 itself. It is possible.

また、従来、ストッパ弾性体１５に治具を押し当てながら外筒１１を圧入する場合、圧入状況によっては、ストッパ弾性体１５の変形によりシワや亀裂等が発生する虞もあるが、本願発明に係る防振装置１０にあっては、規制部１６によりストッパ弾性体１５の変形が抑えられるので、変形によりシワや亀裂等が発生する虞も無くすことができる。   Conventionally, when the outer cylinder 11 is press-fitted while pressing a jig against the stopper elastic body 15, there is a possibility that wrinkles or cracks may occur due to deformation of the stopper elastic body 15 depending on the press-fitting condition. In the vibration isolator 10, since the deformation of the stopper elastic body 15 is suppressed by the restriction portion 16, it is possible to eliminate the possibility that wrinkles, cracks, and the like are generated due to the deformation.

なお、フランジ部１４から外筒１１の軸方向外方へ突出する縦壁状の規制部１６は、振動発生部から防振装置１０に対し大荷重が入力した際、大荷重入力源である振動発生部の、ストッパ弾性体１５を圧縮させる方向への所定範囲を超えた移動を阻止する、ストッパの役割を担うこともできる。金属等により形成されている振動発生部が、ゴム材料により形成された本体弾性体１３ではなく、例えば、鉄、アルミニウム等の金属や樹脂からなる剛性部材により形成された規制部１６に当接することで、振動発生部のそれ以上の移動が阻止されるからである。   The vertical wall-shaped restricting portion 16 that protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14 is a vibration that is a large load input source when a large load is input from the vibration generating portion to the vibration isolator 10. It can also serve as a stopper that prevents the generator from moving beyond a predetermined range in the direction in which the stopper elastic body 15 is compressed. The vibration generating portion formed of metal or the like abuts on the regulating portion 16 formed of a rigid member made of metal or resin such as iron or aluminum, instead of the main body elastic body 13 formed of rubber material. This is because further movement of the vibration generating portion is prevented.

（第２実施形態）
図２に示すように、第２実施形態の防振装置２０は、規制部２１が傾斜面を有する他は、第１実施形態の防振装置１０と基本的に同様の構成を有している。
規制部２１は、フランジ部１４の外周縁に、全周にわたって、フランジ部１４から外筒１１の軸方向外方へ突出すると共に、フランジ部１４の、軸方向外方の外表面に対し、外筒１１の軸方向外方に向かうに従い径方向外側に傾斜する傾斜面を有して、形成されており、この規制部２１に対応して、ストッパ弾性体１５は、その外周面を、傾斜面に沿って規制部２１の内周面に接触させている。 (Second Embodiment)
As shown in FIG. 2, the vibration isolator 20 according to the second embodiment has basically the same configuration as that of the vibration isolator 10 according to the first embodiment except that the restricting portion 21 has an inclined surface. .
The restricting portion 21 protrudes outward from the flange portion 14 in the axial direction of the outer cylinder 11 over the entire outer periphery of the flange portion 14, and is external to the outer surface in the axial direction of the flange portion 14. Corresponding to this restricting portion 21, the stopper elastic body 15 has its outer peripheral surface inclined to the inclined surface. Along the inner peripheral surface of the restricting portion 21.

本実施形態の防振装置２０は、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部２１により、フランジ部１４に形成されるストッパ弾性体１５の硬さを必要に応じて調整することができ、加えて、治具（図示しない）の押し当てによってストッパ弾性体１５に生じる圧縮荷重は、規制部２１によって変形が抑えられたストッパ弾性体１５により、受け止められることになる。   The vibration isolator 20 of the present embodiment is formed on the flange portion 14 by a restriction portion 21 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. The hardness of the stopper elastic body 15 can be adjusted as necessary. In addition, the compression load generated on the stopper elastic body 15 by pressing a jig (not shown) is prevented from being deformed by the restricting portion 21. It is received by the stopper elastic body 15.

このように、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部２１により、フランジ部１４に形成されるストッパ弾性体１５の硬さを必要に応じて調整することができ、特に、規制部２１が傾斜面を有することで、その傾斜角度を調整することにより、ストッパ弾性体１５の硬さをより調整し易くなる。   As described above, the stopper elastic body 15 formed on the flange portion 14 is hardened by the restriction portion 21 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. The thickness of the stopper elastic body 15 can be adjusted more easily by adjusting the inclination angle of the restricting portion 21 having an inclined surface.

（第３実施形態）
図３（ａ），（ｂ）に示すように、第３実施形態の防振装置３０は、規制部１６とストッパ弾性体１５との間に窪み部３１が形成されている他は、第１実施形態の防振装置１０と基本的に同様の構成を有している。 (Third embodiment)
As shown in FIGS. 3A and 3B, the vibration isolator 30 according to the third embodiment is the same as the first embodiment except that a recess 31 is formed between the restricting portion 16 and the stopper elastic body 15. The vibration isolator 10 of the embodiment has basically the same configuration.

窪み部３１は、規制部１６とストッパ弾性体１５との間に、外筒１１の軸方向内方に向かって凹んで形成されており、凹む量、即ち、窪み部３１の深さは、本実施形態においては、規制部１６の突出端１６ａから、規制部１６のフランジ部１４からの突出量（突出高さ）の略半分となる位置まで（図３（ａ）参照）、或いは規制部１６が形成されているフランジ部１４に達する位置まで（図３（ｂ）参照）とされている。この窪み部３１が形成されることにより、規制部１６とストッパ弾性体１５との間には、規制部１６のフランジ部１４からの高さの略半分の空間（図３（ａ）参照）、或いは規制部１６のフランジ部１４からの高さ略全部の空間（図３（ｂ）参照）が設けられる。   The hollow portion 31 is formed between the restricting portion 16 and the stopper elastic body 15 so as to be recessed inward in the axial direction of the outer cylinder 11. The amount of the hollow portion, that is, the depth of the hollow portion 31 is determined as follows. In the embodiment, from the protruding end 16a of the restricting portion 16 to a position that is substantially half the protruding amount (projecting height) of the restricting portion 16 from the flange portion 14 (see FIG. 3A), or the restricting portion 16 Is formed up to the position where the flange portion 14 is formed (see FIG. 3B). By forming the recess 31, a space approximately half the height from the flange portion 14 of the restricting portion 16 (see FIG. 3A) between the restricting portion 16 and the stopper elastic body 15. Or the space (refer FIG.3 (b)) of substantially the whole height from the flange part 14 of the control part 16 is provided.

本実施形態の防振装置３０は、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部１６により、フランジ部１４に形成されるストッパ弾性体１５の硬さを必要に応じて調整することができ、加えて、治具（図示しない）の押し当てによってストッパ弾性体１５に生じる圧縮荷重は、規制部１６によって変形が抑えられたストッパ弾性体１５により、受け止められることになる。   The vibration isolator 30 of the present embodiment is formed in the flange portion 14 by a restriction portion 16 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. The hardness of the stopper elastic body 15 can be adjusted as necessary. In addition, the compression load generated on the stopper elastic body 15 by the pressing of a jig (not shown) is prevented from being deformed by the restricting portion 16. It is received by the stopper elastic body 15.

このように、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部１６により、フランジ部１４に形成されるストッパ弾性体１５の硬さを必要に応じて調整することができ、特に、規制部１６とストッパ弾性体１５との間に空間を設けることで、治具の押し当て（下方移動）による押圧変形が進むに連れて拡大するストッパ弾性体１５の変形分の少なくとも一部を、この空間（窪み部３１）に移動させることができる。このため、ストッパ弾性体１５の押圧変形時に、ストッパ弾性体１５を無理なく確実に変形させることができ、耐久性を向上させることができる。   As described above, the stopper elastic body 15 formed on the flange portion 14 is hardened by the restriction portion 16 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. The height can be adjusted as necessary. In particular, by providing a space between the restricting portion 16 and the stopper elastic body 15, the pressure deformation due to pressing (downward movement) of the jig progresses. At least a part of the deformation of the stopper elastic body 15 to be moved can be moved to this space (recessed portion 31). For this reason, when the stopper elastic body 15 is pressed and deformed, the stopper elastic body 15 can be reliably deformed without difficulty, and durability can be improved.

なお、窪み部３１の深さは、外筒１１の軸方向外方へ突出する規制部１６の突出長さの略半分（図３（ａ）参照）或いは規制部１６の突出長さ（図３（ｂ）参照）に限らず、任意の深さにすることができ、規制部１６とストッパ弾性体１５との間に、ストッパ弾性体１５の変形分の少なくとも一部を移動させることができる空間を、形成するものであれば良い。
このように、ストッパ弾性体１５と共にフランジ部１４に配置される、フランジ部１４から外筒１１の軸方向外方へ突出する規制部１６により、外筒１１のフランジ部１４に形成されるストッパ弾性体１５の剛性を変えることなく、ストッパ弾性体１５の硬さを必要に応じて調整することができるため、ストッパ弾性体１５の耐久性を向上させることができる。 Note that the depth of the recessed portion 31 is approximately half the protruding length of the restricting portion 16 protruding outward in the axial direction of the outer cylinder 11 (see FIG. 3A) or the protruding length of the restricting portion 16 (FIG. 3). (B), the space can be any depth, and at least part of the deformation of the stopper elastic body 15 can be moved between the restricting portion 16 and the stopper elastic body 15. As long as it forms,
Thus, the stopper elasticity formed on the flange portion 14 of the outer cylinder 11 by the restriction portion 16 that is disposed on the flange portion 14 together with the stopper elastic body 15 and protrudes outward in the axial direction of the outer cylinder 11 from the flange portion 14. Since the hardness of the stopper elastic body 15 can be adjusted as necessary without changing the rigidity of the body 15, the durability of the stopper elastic body 15 can be improved.

１０，２０，３０：防振装置、 １１：外筒（外側取付部材）、 １２：内筒（内側取付部材）、 １３：本体弾性体、 １３ａ：すぐり部、 １４：フランジ部、 １５：ストッパ弾性体、 １５ａ，１６ａ：突出端、 １６，２１：規制部、 ３１：窪み部。   10, 20, 30: Vibration isolator, 11: Outer cylinder (outer mounting member), 12: Inner cylinder (inner mounting member), 13: Main body elastic body, 13a: Straightening part, 14: Flange part, 15: Stopper elasticity Body, 15a, 16a: projecting end, 16, 21: restricting portion, 31: recessed portion.

Claims (4)

振動発生部及び振動受部のいずれか一方に連結される筒状の外側取付部材と、前記振動発生部及び前記振動受部の他方に連結される内側取付部材と、前記外側取付部材及び前記内側取付部材を弾性的に連結する本体弾性体と、を有し、
前記外側取付部材の軸方向一端部には、径方向に延びるフランジ部が設けられ、
前記フランジ部には、前記外側取付部材の軸方向外方に突出し、前記外側取付部材と前記内側取付部材との相対変位を制限するとともに治具の押し当てを受け止めるストッパ弾性体が設けられると共に、該ストッパ弾性体の前記外側取付部材の径方向少なくとも一方端側に配置される規制部が形成され、
前記本体弾性体と前記ストッパ弾性体とは、一体に形成され、
前記規制部は、前記外側取付部材の径方向外方端側に配置されるとともに、前記外側取付部材の径方向外方端側において、前記フランジ部から前記外側取付部材の軸方向外方へ突出するように形成され、
前記ストッパ弾性体は、前記規制部に対して、前記外側取付部材の軸方向外方に突出するように構成されていることを特徴とする、防振装置。 A cylindrical outer mounting member connected to one of the vibration generating unit and the vibration receiving unit, an inner mounting member connected to the other of the vibration generating unit and the vibration receiving unit, the outer mounting member and the inner side A main body elastic body for elastically connecting the mounting member,
A flange portion extending in the radial direction is provided at one axial end portion of the outer mounting member,
It said flange portion is projected axially outward of the outer attaching member, wherein with the stopper elastic member for receiving the pressing jig with an outer mounting member to limit the relative displacement between the inner mounting member is provided , A restricting portion is formed which is disposed on at least one end side in the radial direction of the outer mounting member of the stopper elastic body,
The main body elastic body and the stopper elastic body are integrally formed ,
The restricting portion is disposed on the radially outer end side of the outer mounting member, and protrudes outward in the axial direction of the outer mounting member from the flange portion on the radially outer end side of the outer mounting member. Formed to
The anti-vibration device according to claim 1, wherein the stopper elastic body is configured to protrude outward in the axial direction of the outer mounting member with respect to the restricting portion . 前記フランジ部は、前記外側取付部材の軸方向一端部で径方向外方に延びる、
請求項１に記載の防振装置。 Said flange portion, Ru extends radially outwardly at one axial end of said outer mounting member,
The vibration isolator according to claim 1. 前記規制部は、前記外側取付部材の軸方向外方に向かうに従い径方向外側に傾斜する傾斜面を有する、請求項２に記載の防振装置。   The anti-vibration device according to claim 2, wherein the restricting portion has an inclined surface that inclines radially outward as it goes outward in the axial direction of the outer mounting member. 前記規制部と前記ストッパ弾性体との間には、前記外側取付部材の軸方向内方に向かって凹む窪み部が形成されている、請求項１から３のいずれか一項に記載の防振装置。


The anti-vibration device according to any one of claims 1 to 3, wherein a hollow portion that is recessed inward in the axial direction of the outer mounting member is formed between the restricting portion and the stopper elastic body. apparatus.


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