JPWO2004092613A1 - Vibration isolator - Google Patents

Vibration isolator Download PDF

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JPWO2004092613A1
JPWO2004092613A1 JP2005505363A JP2005505363A JPWO2004092613A1 JP WO2004092613 A1 JPWO2004092613 A1 JP WO2004092613A1 JP 2005505363 A JP2005505363 A JP 2005505363A JP 2005505363 A JP2005505363 A JP 2005505363A JP WO2004092613 A1 JPWO2004092613 A1 JP WO2004092613A1
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cylinder
rubber
inner cylinder
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JP4107610B2 (en
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鈴木　顕
顕 鈴木
田村　信之
信之 田村
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
    • F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
    • F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
    • F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
    • F16F13/16—Units of the bushing type, i.e. loaded predominantly radially specially adapted for receiving axial loads

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Abstract

内筒（１）と、外筒（２）と、中間筒（７）と、ゴム状弾性体（３）と、一対の液室（４Ａ），（４Ｂ）と、オリフィス（５）とを設け、内外筒（１），（２）の軸方向一端部（１Ａ），（２Ａ）側ほど中間筒（７）側に位置する第１傾斜面（４１）を備えた一対の第１傾斜璧部（４２）を、内筒（１）の軸方向中間部の外周部側にその内筒（１）の軸芯（Ｏ）を挟んで位置するように設け、内外筒（１），（２）の軸方向他端部（１Ｂ），（２Ｂ）側ほど内筒（１）側に位置する第２傾斜面（４３）を備えた一対の第２傾斜璧部（４４）を、中間筒（７）の軸方向中間部の内周部側に内筒（１）の一対の第１傾斜璧部（４２）を挟んで位置するように設け、第１傾斜面（４１）と第２傾斜面（４３）との間にゴム状弾性体（３）を介在させてある。An inner cylinder (1), an outer cylinder (2), an intermediate cylinder (7), a rubber-like elastic body (3), a pair of liquid chambers (4A) and (4B), and an orifice (5) are provided. A pair of first inclined wall portions provided with a first inclined surface (41) positioned closer to the intermediate cylinder (7) toward the axial one end (1A), (2A) side of the inner and outer cylinders (1), (2). (42) is provided on the outer peripheral side of the axially intermediate portion of the inner cylinder (1) so as to be positioned with the axis (O) of the inner cylinder (1) interposed therebetween, and the inner and outer cylinders (1), (2) A pair of second inclined wall portions (44) having a second inclined surface (43) positioned closer to the inner cylinder (1) toward the other axial end (1B), (2B) side of the intermediate cylinder (7 ) Is provided so as to be sandwiched between the pair of first inclined wall portions (42) of the inner cylinder (1) on the inner peripheral side of the axially intermediate portion, and the first inclined surface (41) and the second inclined surface ( 43) with a rubber-like elastic body (3) interposed A.

Description

本発明は、内筒と、外筒と、前記外筒に内嵌する中間筒と、前記中間筒と内筒の間に加硫成形されて中間筒と内筒を連結するゴム状弾性体と、少なくとも一方側が前記ゴム状弾性体を室壁とする一対の液室と、前記一対の液室同士を連通させるオリフィスとを設けてある液封入式の防振装置、及び、内筒と、外筒と、前記外筒と内筒の間に加硫成形されて外筒と内筒を連結するゴム状弾性体とを設けてある防振装置に関する。  The present invention includes an inner cylinder, an outer cylinder, an intermediate cylinder fitted into the outer cylinder, a rubber-like elastic body that is vulcanized and formed between the intermediate cylinder and the inner cylinder, and connects the intermediate cylinder and the inner cylinder. A liquid-filled vibration isolator having at least one side provided with a pair of liquid chambers having the rubber-like elastic body as a chamber wall, and an orifice communicating the pair of liquid chambers, an inner cylinder, and an outer cylinder The present invention relates to a vibration isolator provided with a cylinder and a rubber-like elastic body that is vulcanized and formed between the outer cylinder and the inner cylinder to connect the outer cylinder and the inner cylinder.

上記の防振装置の例として、自動車のリヤーサスペンションのフロントメンバーと車体フレームとの間や、リヤーサスペンションのリヤーメンバーと車体フレームとの間に設けられる液封入式の防振装置がある。これらの防振装置は、メンバー側の縦孔に圧入され、内筒に挿通させた連結ボルトで車体フレームに連結固定される。そして、振動の入力でゴム状弾性体が弾性変形し、内筒と外筒が相対変位して両液室の容積が変化する。これにより液体がオリフィスを通って流れ、その液体流動効果によって振動減衰効果を得ている。
従来、上記の液封入式の防振装置は、ゴム状弾性体が加硫成形される内筒部分の外周面と中間筒部分の内周面を、共に内外筒の軸芯に平行なストレート面に形成してあった。As an example of the above-described vibration isolator, there is a liquid filled type vibration isolator provided between a front member of a rear suspension of an automobile and a vehicle body frame, or between a rear member of a rear suspension and a vehicle body frame. These vibration isolation devices are press-fitted into the vertical holes on the member side, and are connected and fixed to the vehicle body frame by connecting bolts inserted through the inner cylinder. Then, the rubber-like elastic body is elastically deformed by the input of vibration, the inner cylinder and the outer cylinder are relatively displaced, and the volumes of both liquid chambers change. Thereby, the liquid flows through the orifice, and the vibration damping effect is obtained by the liquid flow effect.
Conventionally, the above-described liquid-filled vibration isolator has a straight surface in which the outer peripheral surface of the inner cylinder portion and the inner peripheral surface of the intermediate cylinder portion where the rubber-like elastic body is vulcanized are parallel to the axis of the inner and outer cylinders. Was formed.

上記従来の構成によれば、内筒と外筒がそれらの軸方向（以下、「上下方向」という）に相対変位する場合、ゴム状弾性体にはせん断力が作用するだけで、ゴム状弾性体の上下方向のばね定数が小さくなっていた。そのために、自動車のロール方向の剛性が弱くなり、操縦安定性の面で改善の余地が残されていた。
ばね定数を上げる手段として、前記内筒部分から中間筒部分側に直角に張出す張出し部と、中間筒部分から内筒部分側に直角に張出す張出し部とを設け、両張出し部でゴム状弾性体を上下方向から挟み込む構造が考えられる。しかしながら、この構造では、ゴム状弾性体に加わる圧縮力が大きくなり過ぎて、ゴム状弾性体の耐久性が低下するという問題がある。
本発明は上記実状に鑑みて成されたもので、その目的は、自動車の操縦安定性をよくすることができ、しかも内外筒間のゴム状弾性体の耐久性を向上させることができる防振装置を提供する点にある。
本第１発明の特徴構成は、内筒と、外筒と、前記外筒に内嵌する中間筒と、前記中間筒と内筒の間に加硫成形されて中間筒と内筒を連結するゴム状弾性体と、少なくとも一方側が前記ゴム状弾性体を室壁とする一対の液室と、前記一対の液室同士を連通させるオリフィスとを設けてある液封入式防振装置であって、
前記内外筒の軸方向一端部側ほど前記中間筒側に位置する第１傾斜面を備えた一対の第１傾斜璧部を、前記内筒の軸方向中間部の外周部側にその内筒の軸芯を挟んで位置するように設け、前記内外筒の軸方向他端部側ほど前記内筒側に位置する第２傾斜面を備えた一対の第２傾斜璧部を、前記中間筒の軸方向中間部の内周部側に前記内筒の一対の第１傾斜璧部を挟んで位置するように設け、前記第１傾斜面と第２傾斜面との間に前記ゴム状弾性体を介在させてある点にある。
（Ａ）この構成によれば、内筒と外筒がそれらの軸方向に相対変位すると、それに伴って内筒側の第１傾斜璧部の第１傾斜面と中間筒側の第２傾斜璧部の第２傾斜面とでこれらの間のゴム状弾性体を押圧する。これにより、ゴム状弾性体に圧縮力及びせん断力を作用させ、内筒及び中間筒の軸方向のゴム状弾性体のばね定数を大きくすることができて、自動車のロール方向の剛性を強くすることができる。
また、例えば、内筒部分から中間筒部分側に直角に張出す張出し部と、中間筒部分から内筒部分側に直角に張出す張出し部とでゴム状弾性体を押圧する構成に比べると、前記圧縮力を小さくすることができ、ゴム状弾性体に作用する圧縮力が大きくなり過ぎるという問題を解消することができる。
本第１発明において、前記外筒の一端部との間に第１ゴム壁を加硫成形した筒金具を前記内筒の一端部に外嵌し、一方の液室を、前記第１ゴム壁と、この第１ゴム壁に対向するように内外筒間に設けたリング状のオリフィス形成部材との間に形成するとともに、他方の液室を、前記オリフィス形成部材と、このオリフィス形成部材を挟んで前記第１ゴム壁とは反対側に設けた第２ゴム壁との間に形成してあると次の作用を奏することができる。
（Ｂ） 一対の液室が内外筒の軸方向に並んだ上記構成の液封入式防振装置は、例えば、自動車のリヤーサスペンションのリヤーメンバーと車体フレームとの間に設けられている。このサスペンション構造では、自動車に組付けられて車体の重量が加わった状態になると前記ゴム状弾性体に大きな荷重が加わる。そのために、上記従来の構造によれば、内筒と外筒の相対変位量が大きくてゴム状弾性体の耐久性が低下しやすい。そこで一般的には、外筒の一端部に張出し形成したフランジに、内筒の一端部側から張出すストッパ金具に対するストッパゴムを加硫成形し、このストッパゴムを軸方向でストッパ金具に常時当接支持させている。しかしながら、この構造では熱老化時のストッパゴムのへたり量が増大し、ばね定数が上がり過ぎやすくなる。
これに対して、本第１発明の上記の構成によれば、自動車に組付けられて車体の重量が加わるとゴム状弾性体に圧縮力が生じるから、内筒と外筒の相対変位量を、例えばゴム状弾性体にせん断力だけが生じる従来の構造よりも小さくすることができる。その結果、ゴム状弾性体の耐久性を向上させることができる。また、ストッパゴムをストッパ金具に常時当接させなくても済み、ストッパゴムのへたり量の増大を抑制できて、上記のばね定数の上がり過ぎを抑制することができる。
本第１発明において、前記一方の液室を前記内筒の一端部の周りに全周にわたって形成し、前記他方の液室を前記内筒の周りに全周にわたって形成し、かつ、前記内外筒の周方向で、前記一対の第１傾斜璧部及びゴム状弾性体の間に形成し、前記第１傾斜璧部を一体に備えた筒状の樹脂材を前記内筒に圧入外嵌し、前記筒金具の端部に前記筒状の樹脂材の端部を受止め支持させ、ストレート筒状の中間筒の所定の部分を径方向内方側に凹ませることで前記中間筒に前記第２傾斜璧部を形成し、前記オリフィス形成部材を、前記内筒との間に前記オリフィスを形成する筒部と、この筒部の一端部から径方向外方側に張出すフランジとから構成し、前記フランジの外周部を、前記中間筒の一端部と、前記外筒の一端部側の内周面に加硫成形したゴム部材から成る段部とで挟持固定し、前記第１ゴム璧を前記一方の液室側に凸の断面円弧状に設定するとともに、前記フランジの縦断面形状が前記第１ゴム璧の縦断面形状にほぼ沿った形状になるように前記フランジの姿勢を設定してあると次の作用を奏することができる。
（Ｃ）一方の液室を前記内筒の一端部の周りに全周にわたって形成し、前記他方の液室を前記内筒の周りに全周にわたって形成したことで液室の容積を十分確保することができ、第１傾斜璧部及び第２傾斜璧部を樹脂材で形成することで軽量化を図ることができる。また、内筒に圧入外嵌した筒状の樹脂材の端部を筒金具の端部に受止め支持させてあり、フランジの外周部を、中間筒の一端部と、外筒の一端部側の内周面に加硫成形したゴム部材から成る段部とで挟持固定してあるから、各部材の組付け構造の強度を強くすることができる。さらに、ストレート筒状の中間筒の所定の部分を径方向内方側に凹ませることで中間筒に第２傾斜璧部を形成してあるから、第２傾斜璧部を形成しやすい。そして、オリフィス形成部材を、内筒との間にオリフィスを形成する筒部と、この筒部の一端部から径方向外方側に張出すフランジとから構成し、第１ゴム璧を一方の液室側に凸の断面円弧状に設定するとともに、前記フランジの縦断面形状が前記第１ゴム璧の縦断面形状にほぼ沿った形状になるように前記フランジの姿勢を設定してあるから、前記筒部を介して両液室に液体を円滑に流動案内することができ、所望の防振特性を得やすくすることができる。
本第１発明において、前記中間筒の他端部を、前記外筒の他端部に形成した折曲部に前記軸方向で受止めさせてあると、次の作用を奏することができる。
（Ｄ）つまり前記組付け構造の強度をより強くすることができる。
本第１発明において、前記外筒の一端部に張出し形成したフランジに、前記内筒の一端部側から張出すストッパ金具に対するストッパゴムを、前記軸方向で前記ストッパ金具から離間して位置するように加硫成形し、前記一対の第１傾斜璧部とは別の方向から内筒の軸芯を挟んで位置する一対のストッパ部を、前記内筒の他端部側の樹脂材の端部に膨出形成し、前記中間筒の内周部に、前記他方の液室の室壁を形成するゴム内周璧を加硫成形し、前記ゴム内周璧に、前記一対のストッパ部の径方向外方側に位置する一対のすぐり穴を形成してあると次の作用を奏することができる。
（Ｅ）外筒の一端部に張出し形成したフランジに、内筒の一端部側から張出すストッパ金具に対するストッパゴムを、軸方向でストッパ金具から離間して位置するように加硫成形したことで、例えば前記ストッパゴムを常時ストッパ金具に当接させておく構造よりも、ストッパゴムに加わる負担を軽減でき、ストッパゴムの寿命を長くすることができる。軸方向の大変位時にはストッパゴムとストッパ金具が当接して変位を規制することができる。そして、一対のすぐり穴で前記すぐり穴が並ぶ径方向のばね定数を下げることができるとともに、一対のストッパ部で前記径方向の変位を規制することができる。一対のストッパ部を、内筒の他端部側の樹脂材の端部に膨出形成してあるから、前記他方の液室を深く形成することができて液室の容積を十分確保することができ、しかも、ストッパ部の周りに液室を形成する構造に比べると液室の形状を簡素化することができる。
本第１発明において、前記ゴム状弾性体と第２ゴム壁とゴム内周璧とを一体に加硫成形して連ならせてあると、次の作用を奏することができる。
（Ｆ）ゴム状弾性体と第２ゴム壁とゴム内周璧とを一体に加硫成形して連ならせてあるから、これらを一挙に成形することができて成形コストを低廉化できる。
本第１発明において、前記一対の液室を、前記一対の第１傾斜璧部及び一対の第２傾斜璧部とは別の方向から前記内筒を挟んで位置するように配置してあると、次の作用を奏することができる。
（Ｇ） 一対の液室が内外筒の周方向に並んだ上記の構成の液封入式防振装置は、例えば、自動車のリヤーサスペンションのフロントメンバーと車体フレームとの間に設けられている。このような液封入式防振装置において、上記（Ａ）と同様の作用を奏することができる。
本第２発明の特徴構成は、内筒と、外筒と、前記外筒と内筒の間に加硫成形されて外筒と内筒を連結するゴム状弾性体とを設けてある防振装置であって、
前記内外筒の軸方向一端部側ほど前記外筒側に位置する第１傾斜面を備えた一対の第１傾斜璧部を、前記内筒の軸方向中間部の外周部側にその内筒の軸芯を挟んで位置するように設け、前記内外筒の軸方向他端部側ほど前記内筒側に位置する第２傾斜面を備えた一対の第２傾斜璧部を、前記外筒の軸方向中間部の内周部側に前記内筒の一対の第１傾斜璧部を挟んで位置するように設け、前記第１傾斜面と第２傾斜面との間に前記ゴム状弾性体を介在させてある点にあり、この構成によれば上記（Ａ）と同様の作用を奏することができる。According to the above-described conventional configuration, when the inner cylinder and the outer cylinder are relatively displaced in the axial direction (hereinafter referred to as “vertical direction”), only the shearing force acts on the rubber-like elastic body. The spring constant in the vertical direction of the body was small. For this reason, the rigidity of the automobile in the roll direction has become weak, and there remains room for improvement in terms of handling stability.
As means for increasing the spring constant, there are provided an overhang portion projecting perpendicularly from the inner tube portion toward the intermediate tube portion side, and an overhang portion projecting perpendicularly from the intermediate tube portion toward the inner tube portion side. A structure in which the elastic body is sandwiched from above and below can be considered. However, in this structure, there is a problem that the compressive force applied to the rubber-like elastic body becomes too large and the durability of the rubber-like elastic body is lowered.
The present invention has been made in view of the above circumstances, and its object is to improve vibration control stability of the automobile and improve the durability of the rubber-like elastic body between the inner and outer cylinders. The point is to provide a device.
The characteristic configuration of the first invention is an inner cylinder, an outer cylinder, an intermediate cylinder fitted into the outer cylinder, and vulcanized between the intermediate cylinder and the inner cylinder to connect the intermediate cylinder and the inner cylinder. A liquid-filled vibration isolator comprising a rubber-like elastic body, a pair of liquid chambers having at least one side as a chamber wall of the rubber-like elastic body, and an orifice for communicating the pair of liquid chambers,
A pair of first inclined wall portions provided with a first inclined surface located closer to the intermediate cylinder side toward one end part in the axial direction of the inner and outer cylinders are arranged on the outer peripheral side of the axial intermediate part of the inner cylinder. A pair of second inclined wall portions provided with a second inclined surface provided on the inner cylinder side toward the other axial end side of the inner and outer cylinders are provided so as to be positioned across the shaft core. Provided on the inner peripheral side of the middle of the direction so as to sandwich the pair of first inclined wall portions of the inner cylinder, and interpose the rubber-like elastic body between the first inclined surface and the second inclined surface It is in a certain point.
(A) According to this configuration, when the inner cylinder and the outer cylinder are relatively displaced in the axial direction, the first inclined surface of the first inclined wall portion on the inner cylinder side and the second inclined wall on the intermediate cylinder side are accordingly accompanied. The rubber-like elastic body between them is pressed with the second inclined surface of the part. Thereby, compressive force and shearing force are applied to the rubber-like elastic body, the spring constant of the rubber-like elastic body in the axial direction of the inner cylinder and the intermediate cylinder can be increased, and the rigidity in the roll direction of the automobile is increased. be able to.
In addition, for example, compared to a configuration in which the rubber-like elastic body is pressed with an overhang portion that projects at a right angle from the inner tube portion to the intermediate tube portion side and an overhang portion that projects at a right angle from the intermediate tube portion to the inner tube portion side, The compression force can be reduced, and the problem that the compression force acting on the rubber-like elastic body becomes too large can be solved.
According to the first aspect of the present invention, a cylindrical metal fitting obtained by vulcanizing a first rubber wall between one end portion of the outer cylinder is externally fitted to one end portion of the inner cylinder, and one liquid chamber is connected to the first rubber wall. And a ring-shaped orifice forming member provided between the inner and outer cylinders so as to face the first rubber wall, and the other liquid chamber is sandwiched between the orifice forming member and the orifice forming member. If it is formed between the second rubber wall provided on the side opposite to the first rubber wall, the following effects can be obtained.
(B) The liquid-filled vibration isolator having the above configuration in which a pair of liquid chambers are arranged in the axial direction of the inner and outer cylinders is provided, for example, between a rear member of a rear suspension of an automobile and a vehicle body frame. In this suspension structure, a large load is applied to the rubber-like elastic body when it is assembled to an automobile and the weight of the vehicle body is applied. Therefore, according to the conventional structure, the relative displacement between the inner cylinder and the outer cylinder is large, and the durability of the rubber-like elastic body is likely to be lowered. Therefore, in general, a stopper rubber against the stopper fitting that is extended from one end of the inner cylinder is vulcanized on a flange that is formed on one end of the outer cylinder, and this stopper rubber is always applied to the stopper fitting in the axial direction. I support it. However, in this structure, the amount of sag of the stopper rubber during heat aging increases, and the spring constant tends to increase too much.
On the other hand, according to the above-described configuration of the first aspect of the present invention, when the weight of the vehicle body is added to the automobile, a compression force is generated in the rubber-like elastic body. For example, it can be made smaller than the conventional structure in which only a shearing force is generated in the rubber-like elastic body. As a result, the durability of the rubber-like elastic body can be improved. In addition, the stopper rubber does not always have to be brought into contact with the stopper fitting, and an increase in the amount of the stopper rubber can be suppressed, so that the spring constant can be suppressed from being excessively increased.
In the first aspect of the invention, the one liquid chamber is formed around one end of the inner cylinder over the entire circumference, the other liquid chamber is formed around the inner cylinder over the entire circumference, and the inner and outer cylinders are formed. In the circumferential direction, a cylindrical resin material formed between the pair of first inclined wall portions and the rubber-like elastic body and integrally provided with the first inclined wall portion is press-fitted and fitted into the inner cylinder, The end portion of the cylindrical resin material is received and supported by the end portion of the cylindrical metal fitting, and a predetermined portion of the straight cylindrical intermediate tube is recessed inward in the radial direction so that the second portion is inserted into the intermediate tube. An inclined wall portion is formed, and the orifice forming member is composed of a cylinder portion that forms the orifice between the inner cylinder and a flange that projects radially outward from one end of the cylinder portion, The outer peripheral portion of the flange is vulcanized and formed on one end portion of the intermediate tube and the inner peripheral surface on the one end portion side of the outer tube. The first rubber wall is clamped and fixed with a stepped portion made of a member, and the vertical cross-sectional shape of the flange is set to a vertical cross-sectional shape of the first rubber wall. If the posture of the flange is set so as to be substantially in line with the above, the following action can be achieved.
(C) One liquid chamber is formed over the entire circumference around one end of the inner cylinder, and the other liquid chamber is formed over the entire circumference around the inner cylinder to ensure a sufficient volume of the liquid chamber. It is possible to reduce the weight by forming the first inclined wall portion and the second inclined wall portion with a resin material. The end of the cylindrical resin material that is press-fitted into the inner cylinder is received and supported by the end of the cylinder fitting, and the outer periphery of the flange is connected to one end of the intermediate cylinder and one end of the outer cylinder. Since the inner peripheral surface is sandwiched and fixed by a step portion made of a vulcanized rubber member, the strength of the assembly structure of each member can be increased. Furthermore, since the second inclined wall portion is formed in the intermediate cylinder by denting a predetermined portion of the straight cylindrical intermediate cylinder inward in the radial direction, the second inclined wall portion is easily formed. The orifice forming member includes a cylindrical portion that forms an orifice with the inner cylinder, and a flange that protrudes radially outward from one end of the cylindrical portion, and the first rubber wall is formed as one liquid. The flange is set to have an arc shape that is convex to the chamber side, and the posture of the flange is set so that the vertical cross-sectional shape of the flange is substantially in line with the vertical cross-sectional shape of the first rubber wall. The liquid can be smoothly guided to both the liquid chambers via the cylindrical portion, and desired vibration isolation characteristics can be easily obtained.
In the first aspect of the present invention, when the other end portion of the intermediate cylinder is received in the axial direction by a bent portion formed at the other end portion of the outer cylinder, the following action can be achieved.
(D) That is, the strength of the assembly structure can be further increased.
In the first aspect of the present invention, a stopper rubber for a stopper fitting that projects from one end of the inner cylinder is positioned on the flange that projects from one end of the outer cylinder so as to be spaced apart from the stopper fitting in the axial direction. A pair of stopper portions positioned across the axis of the inner cylinder from a direction different from the pair of first inclined wall portions, and end portions of the resin material on the other end side of the inner cylinder A rubber inner peripheral wall forming a chamber wall of the other liquid chamber is vulcanized and formed on the inner peripheral portion of the intermediate cylinder, and the diameter of the pair of stopper portions is formed on the rubber inner peripheral wall. If a pair of straight holes located on the outer side in the direction is formed, the following action can be obtained.
(E) By vulcanizing and molding the stopper rubber against the stopper fitting overhanging from one end of the inner cylinder on the flange that is formed over the one end of the outer cylinder so as to be positioned away from the stopper fitting in the axial direction. For example, the load applied to the stopper rubber can be reduced and the life of the stopper rubber can be extended as compared with a structure in which the stopper rubber is always in contact with the stopper fitting. When a large displacement occurs in the axial direction, the stopper rubber and the stopper fitting come into contact with each other to restrict the displacement. In addition, the radial spring constant in which the tickling holes are arranged by a pair of tickling holes can be lowered, and the radial displacement can be regulated by the pair of stopper portions. Since the pair of stopper portions are formed to bulge at the end of the resin material on the other end side of the inner cylinder, the other liquid chamber can be formed deeply to ensure a sufficient volume of the liquid chamber. In addition, the shape of the liquid chamber can be simplified as compared with the structure in which the liquid chamber is formed around the stopper portion.
In the first aspect of the present invention, when the rubber-like elastic body, the second rubber wall, and the inner peripheral wall of the rubber are integrally vulcanized and formed, the following effects can be obtained.
(F) Since the rubber-like elastic body, the second rubber wall, and the rubber inner peripheral wall are integrally formed by vulcanization molding, they can be molded all at once, and the molding cost can be reduced.
In the first aspect of the invention, the pair of liquid chambers are disposed so as to be located across the inner cylinder from a direction different from the pair of first inclined wall portions and the pair of second inclined wall portions. The following effects can be achieved.
(G) The liquid-filled vibration isolator having the above configuration in which a pair of liquid chambers are arranged in the circumferential direction of the inner and outer cylinders is provided, for example, between a front member of a rear suspension of an automobile and a body frame. In such a liquid-filled vibration isolator, the same effect as the above (A) can be achieved.
The characteristic configuration of the second invention is an anti-vibration device provided with an inner cylinder, an outer cylinder, and a rubber-like elastic body that is vulcanized and formed between the outer cylinder and the inner cylinder to connect the outer cylinder and the inner cylinder. A device,
A pair of first inclined wall portions provided with a first inclined surface located on the outer cylinder side toward the one axial end side of the inner and outer cylinders are arranged on the outer peripheral side of the axial intermediate portion of the inner cylinder. A pair of second inclined wall portions provided with a second inclined surface provided on the inner cylinder side toward the other axial end side of the inner and outer cylinders are provided so as to be positioned across the shaft core. Provided on the inner peripheral side of the middle of the direction so as to sandwich the pair of first inclined wall portions of the inner cylinder, and interpose the rubber-like elastic body between the first inclined surface and the second inclined surface According to this configuration, it is possible to achieve the same effect as the above (A).

第１図は液封入式防振装置の平面図、
第２図は、車体フレームに取付けた状態の液封入式防振装置を示し、液封入式防振装置については第１図のＤ−Ｏ−Ｄ断面図、
第３図は液封入式防振装置の底面図、
第４図は、外筒を取付ける前の状態の内筒や中間筒等の平面図、
第５図は、外筒を取付ける前の状態の内筒や中間筒等の縦断面図、
第６図は、外筒を取付ける前の状態の内筒や中間筒等の底面図、
第７図は外筒等の平面図、
第８図は外筒等の縦断面図、
第９図は外筒等の底面図、
第１０図は中間筒の平面図、
第１１図は第１０図のＡ−Ｏ−Ａ断面図、
第１２図は内筒の平面図、
第１３図は、第２実施形態の液封入式防振装置の平面図
第１４図は、車体フレームに取付けた状態の第２実施形態の液封入式防振装置を示し、液封入式防振装置については第１３図のＡ−Ｏ−Ａ断面図
第１５図は第１４図のＢ−Ｂ断面図
第１６図は第２実施形態の内筒本体の平面図
第１７図は第１６図のＡ−Ｏ−Ａ断面図
第１８図は第２実施形態の中間筒の平面図
第１９図は第１８図のＢ−Ｏ−Ｂ断面図
第２０図は第２実施形態の中間筒の側面図
第２１図は第２実施形態における実施例１のゴム状弾性体の周りの構造を示す縦断面図
第２２図は第２実施形態における実施例２のゴム状弾性体の周りの構造を示す縦断面図
第２３図は第３実施形態の防振装置の縦断面図、
第２４図は防振装置の特性を示す図である。FIG. 1 is a plan view of a liquid-filled vibration isolator,
FIG. 2 shows the liquid-filled vibration isolator attached to the vehicle body frame, and the liquid-filled vibration isolator is taken along the line D-O-D in FIG.
FIG. 3 is a bottom view of the liquid-filled vibration isolator,
FIG. 4 is a plan view of the inner cylinder and the intermediate cylinder before the outer cylinder is attached,
FIG. 5 is a longitudinal sectional view of the inner cylinder and the intermediate cylinder before the outer cylinder is attached,
FIG. 6 is a bottom view of the inner cylinder and the intermediate cylinder in a state before the outer cylinder is attached,
FIG. 7 is a plan view of an outer cylinder, etc.
FIG. 8 is a longitudinal sectional view of an outer cylinder, etc.
FIG. 9 is a bottom view of the outer cylinder, etc.
FIG. 10 is a plan view of the intermediate cylinder,
FIG. 11 is a cross-sectional view taken along the line A-O-A in FIG.
FIG. 12 is a plan view of the inner cylinder,
FIG. 13 is a plan view of the liquid-filled vibration isolator of the second embodiment. FIG. 14 shows the liquid-filled vibration isolator of the second embodiment in a state of being attached to the vehicle body frame. FIG. 15 is a cross-sectional view taken along the line BB of FIG. 14. FIG. 16 is a plan view of the inner cylinder body of the second embodiment. FIG. 18 is a plan view of the intermediate cylinder of the second embodiment. FIG. 19 is a cross-sectional view of B-OB line of FIG. 18. FIG. 20 is a side view of the intermediate cylinder of the second embodiment. FIG. 21 is a longitudinal sectional view showing the structure around the rubber-like elastic body of Example 1 in the second embodiment. FIG. 22 is a longitudinal section showing the structure around the rubber-like elastic body of Example 2 in the second embodiment. FIG. 23 is a longitudinal sectional view of the vibration isolator of the third embodiment,
FIG. 24 shows the characteristics of the vibration isolator.

［第１実施形態］
第１図，第２図，第３図に、自動車のリヤーサスペンションのリヤーメンバーと車体フレームとの間に設けられる円筒型の液封入式防振装置を示してある。この液封入式防振装置は、内筒１と、外筒２と、外筒２に内嵌する中間筒７と、中間筒７と内筒１の間に加硫成形されて中間筒７と内筒１を連結するゴム状弾性体３と、少なくとも一方側がゴム状弾性体３を室壁とする一対の液室４Ａ，４Ｂと、一対の液室４Ａ，４Ｂ同士を連通させる環状のオリフィス５とを備えている。
また、内外筒１，２の軸方向一端部１Ａ，２Ａ（下端部）側ほど中間筒７側に位置する第１傾斜面４１を備えた一対の第１傾斜璧部４２を、内筒１の軸方向中間部の外周部側にその内筒１の軸芯Ｏを挟んで位置するように設け（第４図，第６図，第１２図参照）、内外筒１，２の軸方向他端部１Ｂ，２Ｂ（下端部）側ほど内筒１側に位置する第２傾斜面４３を備えた一対の第２傾斜璧部４４を、中間筒７の軸方向中間部の内周部側に内筒１の一対の第１傾斜璧部４２を挟んで位置するように設け（第４図，第６図，第１０図，第１１図参照）、第１傾斜面４１と第２傾斜面４３との間に前記ゴム状弾性体３を介在させてある。この液封入式防振装置は、リヤーメンバーに設けた縦カラー６に縦姿勢で圧入され、内筒１に挿通させた連結ボルト（図示せず）で車体フレーム３０に連結固定される。
各部の構成について説明すると、第２図，第７図，第８図，第９図に示すように、外筒２の一端部２Ａとの間に第１ゴム壁５０を加硫成形したキャップ状の筒金具５１を内筒１の一端部１Ａに圧入外嵌し、一方の液室４Ａ（以下、「下側液室４Ａ」）を、第１ゴム壁５０と、この第１ゴム壁５０に対向するように内外筒１，２間に設けた円形リング状のオリフィス形成部材５２との間に形成するとともに、他方の液室４Ｂ（以下、「上側液室４Ｂ」）を、オリフィス形成部材５２と、このオリフィス形成部材５２を挟んで第１ゴム壁５０とは反対側に設けた第２ゴム壁５３（第１図参照）との間に形成してある。より詳しくは、下側液室４Ａを内筒１の一端部１Ａの周りに全周にわたって形成し、上側液室４Ｂを内筒１の周りに全周にわたって形成し、かつ、上側液室４Ｂを内外筒１，２の周方向で、一対の第１傾斜璧部４２及びゴム状弾性体３の間に形成してある。
前記第１傾斜璧部４２を一体に備えた筒状の樹脂材５４を内筒１に圧入外嵌し、筒金具５１の端部５１Ａに筒状の樹脂材５４の端部５４Ａを受止め支持させ、第１０図，第１１図に示すように、ストレート筒状の中間筒７の所定の部分を、縦断面形状が「く」の字形に径方向内方側に凹ませることで中間筒７に第２傾斜璧部４４を形成してある。この第２傾斜璧部４４の背面と外筒２の間にも液体が封入されている（第２図参照）。
そしてオリフィス形成部材５２を、内筒１との間にオリフィス５を形成する円筒部５５と、この円筒部５５の一端部から径方向外方側に張出すフランジ５６とから構成し、フランジ５６の外周部を、中間筒７の一端部５７と、外筒２の一端部２Ａ側の内周面に加硫成形したゴム部材から成る段部５８とで挟持固定し、第１ゴム璧５０を下側液室４Ａ側に凸の断面円弧状に設定するとともに、フランジ５６の縦断面形状が第１ゴム璧５０の縦断面形状にほぼ沿った形状になるように、フランジ５６の姿勢を設定してある。中間筒７の他端部５９は、外筒２の他端部２Ｂに形成した折曲部６０に軸方向で受止められている。
第２図，第７図，第８図，第９図に示すように、外筒２の一端部２Ａに張出し形成したフランジ６１に、内筒１の一端部１Ａ側から張出すストッパ金具３１に対するストッパゴム６２を、軸方向でストッパ金具３１から離間して位置するように加流成形してある。ストッパ金具３１はリング円板状に形成され、連結ボルトの頭部と内筒１の一端部（詳しくは座金３２）とに挟持固定されている。
そして、第２図，第４図，第５図，第６図に示すように、一対の第１傾斜璧部４２とは別の方向から内筒１の軸芯Ｏを挟んで位置する一対のストッパ部１３を、内筒１の他端部１Ｂ側の樹脂材５４の端部５４Ｂに膨出形成し、中間筒７の内周部に、上側液室４Ｂの室壁を形成するゴム内周璧６３を加硫成形し、ゴム内周璧６３に、一対のストッパ部１３の径方向外方側に位置する一対のすぐり穴６４を形成してある。前記別の方向とは、一対の第１傾斜璧部４２が前記軸芯Ｏを挟む方向に対して直交する方向である。一対のすぐり穴６４は平面視で円弧状で、底部がオリフィス形成部材５２の筒部５５の上端部近傍まで達した深い穴に形成されている。ゴム状弾性体３と第２ゴム壁５３とゴム内周璧６３とは一体に加硫成形されて連なっている。内筒１の他端部１Ｂ側は径方向外方側に少し張出させてある。その張出し部６５の付け根部にリング円板状のストッパゴム６６を外嵌させてある。
第１傾斜面４１と第２傾斜面４３は互いに平行である。そして、それらの内外筒１，２の軸芯Ｏに対する傾斜角度θ１，θ２（第５図，第１１図参照）を２５°に設定してある。内外筒１，２の軸方向で第１傾斜面４１と第２傾斜面４３とは重複してはいない。
上記構造の液封入式防振装置に振動が入力すると、内筒１と外筒２が相対変位するとともに、ゴム状弾性体３，第１ゴム壁５０，第２ゴム壁５３等が弾性変形して両液室４Ａ，４Ｂの容積が変化し、液体がオリフィス５を通って流動する。この液体流動効果によって振動減衰効果を得ることができる。
［第２実施形態］
本実施形態の液封入式防振装置は自動車のリヤーサスペンションのフロントメンバーと車体フレームとの間に設けられる。第１３図〜第２０図に示すように、第１実施形態とは異なって、一対の液室４Ａ，４Ｂを、一対の第１傾斜璧部４２及び一対の第２傾斜璧部４４とは別の方向から内筒１を挟んで位置するように配置してある。前記別の方向とは、一対の第１傾斜璧部４２が前記軸芯Ｏを挟む方向に対して直交する方向である。以下、第２実施形態の液封入式防振装置の構造について説明する。
第１３図，第１４図，第１５図に示すように、上記の液封入式防振装置は、内筒１と、外筒２と、外筒２に内嵌する中間筒７と、中間筒７と内筒１の間に加硫成形されて中間筒７と内筒１を連結するゴム状弾性体３と、ゴム状弾性体３を室壁とする一対の液室４Ａ，４Ｂと、一対の液室４Ａ，４Ｂ同士を連通させるオリフィス５とを備えている。第１４図に示すように上記構造の液封入式防振装置は、フロントメンバーに設けた縦カラー６に圧入され、内筒１に挿通させた連結ボルトＢで車体フレーム３０に連結固定される。
内筒１と、これを囲む中間筒７の後述の縦壁９との間に前記一対のゴム状弾性体３を加硫成形してある。Ｏは内筒１・中間筒７・外筒２の軸芯である。第１８図，第１９図，第２０図にも示すように、中間筒７は、外筒２に圧接させる軸方向両端側の一対のリング部８と、一対のリング部８同士を互いに連結する一対の互いに対向した縦壁９とから成り、中間筒７の周方向で両縦壁９の間を開口させてある。また、上端部を折曲してフランジ４５を形成してある。一対の縦壁９は断面が円弧状で、中間筒７の軸芯Ｏに対して点対称に位置している。内筒１と中間筒７の構造については後でさらに詳しく説明する。
液室４Ａ，４Ｂは、内外筒１，２の周方向で一方のゴム状弾性体３と他方のゴム状弾性体３との間の空間を、内外筒１，２の軸方向両外方側から一対の互いに対向するゴム壁１１Ａ，１１Ｂで各別に覆って形成してある。ゴム壁１１Ａ，１１Ｂはゴム状弾性体３と一体に加硫成形され、リング部８の内周面と、内外筒１，２の周方向で両ゴム状弾性体３の間の内筒部分とに加硫接着されている。
一対のゴム壁１１Ａ，１１Ｂの間の内筒部分を膨出させ、ゴム壁１１Ａ，１１Ｂと連なるゴム部材１２で覆うことで、内筒部分をストッパ部１３に構成してある。このストッパ部１３によって、内筒１と外筒２の相対変位を所定の範囲内に抑え、内筒１と外筒２の過剰な相対変位を防止する。１４は内筒１を覆うゴム膜である。これはゴム壁１１Ａ，１１Ｂと連なっている。
内筒１は、外筒２との間にゴム状弾性体３を介在させる内筒本体１５と、この内筒本体１５の軸方向の一端部１６に圧入内嵌される筒部材１８とから成り、筒部材１８に、内筒本体１５の一端部１６よりも大径のフランジ１９を形成し、そのフランジ１９の一端面２０を車体フレーム３０の取付け面３５に当接させるよう構成してある。１７は筒部材１８の圧入筒部である。筒部材１８は鍛造により形成してあり、鍛造の際にフランジ１９の一端面２０を表面粗し加工してある。
第１６図〜第２０図にも示すように、内外筒１，２の軸方向一端部１Ａ，２Ａ（上端部）側ほど中間筒７側に位置する第１傾斜面４１を備えた一対の第１傾斜璧部４２を、内筒１の軸方向中間部の外周部側にその内筒１の軸芯Ｏを挟んで位置するように設け、内外筒１，２の軸方向他端部１Ｂ，２Ｂ（下端部）側ほど内筒１側に位置する第２傾斜面４３を備えた一対の第２傾斜璧部４４を、中間筒７の軸方向中間部の内周部側に内筒１の一対の第１傾斜璧部４２を挟んで位置するように設け、第１傾斜面４１と第２傾斜面４３との間に前記ゴム状弾性体３を介在させてある。
第１６図，第１７図に示すように、内筒１側の第１傾斜璧部４２は、内筒１の軸方向中間部を縦断面形状が三角凸部になるように膨出させて形成してある。第１傾斜璧部４２の上面は内筒本体１５の軸芯Ｏに対して直角である。第１８図，第１９図，第２０図に示すように、中間筒７側の第２傾斜璧部４４は（ストレート筒状の）中間筒７の縦壁９の中間部を「く」の字形に径方向内方側に凹ませて形成してある。「く」の字形の縦壁部分の背面と外筒部分の間にもゴム状弾性体３を加硫成形して、縦壁部分をゴム状弾性体３に埋没させてある。オリフィス５は縦壁部分の背面と外筒部分との間に位置している。
前記第１傾斜面４１と第２傾斜面４３は互いに平行である。そして、それらの内外筒１，２の軸芯Ｏに対する傾斜角度θ１，θ２（第１７図，第１９図参照）を２５°に設定してある。内外筒１，２の軸方向で第１傾斜面４１と第２傾斜面４３とは重複してはいない。第１傾斜面４１と第２傾斜面４３はゴム状弾性体３を、両傾斜面４１，４３と交差する方向で挟み込んでいる。外筒２は、本装置の製作過程において、中間筒７等を収容した状態で液体中で縮径加工し、上下両端部を径方向内方側に折り曲げてある。これにより、前述のように中間筒７のリング部８が外筒２に圧接し、液室４Ａ，４Ｂ内に液体が封入される。第１４図において、３２は内筒１の他端面（この面も表面粗し加工してある）に圧接する座金、３１は、連結ボルトＢの頭部と座金３２との間に介在するストッパ金具、３３はストッパゴムであり、内筒１が大きく上昇したときに、ストッパ金具３１がストッパゴム３３に当って、内筒１の変位を所定の範囲内に抑える。
車体フレーム３０に対する上記構造の液封入式防振装置の連結固定状態で、筒部材１８のフランジ１９の一端面２０は、車体フレーム３０の取付け面３５に圧接している。この液封入式防振装置に振動が入力すると、内筒１と外筒２が相対変位するとともに、ゴム状弾性体３，ゴム壁１１Ａ，１１Ｂ等が弾性変形して両液室４Ａ，４Ｂの容積が変化し、液体がオリフィス５を通って流動する。この液体流動効果によって振動減衰効果を得ることができる。
本発明者は、上記構造の防振装置を製作し、そのゴム状弾性体３のばね定数を測定した。測定の条件・結果を第２４図に示し、測定した液封入式防振装置の要部の構造を第２１図，第２２図に示してある。第２１図は、外筒２に内嵌する前の状態のゴム状弾性体３・内筒本体１５・中間筒７等を示す第１実施例の縦断面図、第２２図は、外筒２に内嵌する前の状態のゴム状弾性体３・内筒本体１５・中間筒７等を示す第２実施例の縦断面図である。
第２４図，第２１図，第２２図において、Ｒ１は内筒本体１５の下端側の半径、Ｒ２は内筒１側の壁部４２の最大半径（壁部４２の突出端と軸芯Ｏとの距離）、Ｒ３は中間筒７の下端側の半径、Ｌ１は内筒１側の壁部４２の上面から内筒本体１５の下端面までの長さ、Ｌ２は第２傾斜面４３の上端から内筒本体１５の下端までの長さ、Ｌ３は第２傾斜面４３の下端から内筒本体１５の下端までの長さである。θ１は内筒本体１５の軸芯Ｏに対する第１傾斜面４１の角度、θ２は中間筒７の軸芯Ｏに対する第２傾斜面４３の角度である。Ｋｓ（Ｐ）は、内筒本体１５の軸方向（軸方向）におけるゴム状弾性体３の静ばね定数、Ｋｓ（Ｒ）は、内筒本体１５の径方向（軸直角方向）におけるゴム状弾性体３の静ばね定数である。
第２４図の表によれば、実施例１，実施例２とも、内筒本体１５の軸方向におけるゴム状弾性体３の静ばね定数Ｋｓ（Ｐ）が大きくなり、Ｋｓ（Ｐ）／Ｋｓ（Ｒ）も０．２以上（従来構造のものは０．１〜０．１５）と大きくなった。
［第３実施形態］
本実施形態の防振装置は液体を封入してない型の防振装置である。第２３図に示すように、内筒１と、外筒２と、外筒２と内筒１の間に加硫成形されて外筒２と内筒１を連結するゴム状弾性体３とを設け、内外筒１，２の軸方向一端部１Ａ，２Ａ側ほど外筒２側に位置する第１傾斜面４１を備えた一対の第１傾斜璧部４２を、内筒１の軸方向中間部の外周部側にその内筒１の軸芯Ｏを挟んで位置するように設け、内外筒１，２の軸方向他端部１Ｂ，２Ｂ側ほど前記内筒１側に位置する第２傾斜面４３を備えた一対の第２傾斜璧部４４を、外筒２の軸方向中間部の内周部側に内筒１の一対の第１傾斜璧部４２を挟んで位置するように設け、第１傾斜面４１と第２傾斜面４３との間に前記ゴム状弾性体３を介在させて構成してある。第１実施形態で説明した第１図〜第１２図中の符号と同じ符号の部材は、第１実施形態の部材と同一構造の部材であり、詳しい説明については説明を省略する。
［別実施形態］
（１）前記上記の第１傾斜面４１及び第２傾斜面４３の傾斜を、以上の実施形態とは、逆にした構造であってもよい。例えば第１実施形態において、内外筒１，２の軸方向上端部１Ｂ，２Ｂ（一端部に相当）側ほど中間筒７側に位置する第１傾斜面４１を備えた一対の第１傾斜璧部４２を、内筒１の軸方向中間部の外周部側にその内筒１の軸芯Ｏを挟んで位置するように設け、内外筒１，２の軸方向下端部１Ａ，２Ａ（他端部に相当）側ほど内筒１側に位置する第２傾斜面４３を備えた一対の第２傾斜璧部４４を、中間筒７の軸方向中間部の内周部側に内筒１の一対の第１傾斜璧部４２を挟んで位置するように設け、第１傾斜面４１と第２傾斜面４３との間にゴム状弾性体３を介在させてあってもよい。
（２）以上の実施形態において、前記第１傾斜面４１と第２傾斜面４３は互いに平行でなくてもよい。また、以上の実施形態で挙げた数値は一例であり、別の数値であってもよい。[First Embodiment]
1, 2 and 3 show a cylindrical liquid-filled vibration isolator provided between a rear member of a rear suspension of an automobile and a body frame. This liquid-filled vibration isolator includes an inner cylinder 1, an outer cylinder 2, an intermediate cylinder 7 fitted into the outer cylinder 2, and a vulcanization molding between the intermediate cylinder 7 and the inner cylinder 1. A rubber-like elastic body 3 for connecting the inner cylinder 1, a pair of liquid chambers 4A, 4B having at least one side as a chamber wall, and an annular orifice 5 for communicating the pair of liquid chambers 4A, 4B with each other. And.
In addition, a pair of first inclined wall portions 42 including a first inclined surface 41 located on the intermediate tube 7 side toward the axial one end portions 1A and 2A (lower end portions) of the inner and outer tubes 1 and 2 are provided on the inner tube 1. Provided on the outer peripheral side of the axially intermediate portion so as to sandwich the core O of the inner cylinder 1 (see FIGS. 4, 6, and 12), and the other axial ends of the inner and outer cylinders 1 and 2 A pair of second inclined wall portions 44 provided with a second inclined surface 43 positioned closer to the inner cylinder 1 toward the portions 1B and 2B (lower end portions) are disposed on the inner peripheral side of the intermediate portion in the axial direction of the intermediate cylinder 7. The first inclined surface 41 and the second inclined surface 43 are provided so as to be positioned between the pair of first inclined wall portions 42 of the cylinder 1 (see FIGS. 4, 6, 10, and 11). The rubber-like elastic body 3 is interposed between them. This liquid-filled vibration isolator is press-fitted in a vertical posture into a vertical collar 6 provided on a rear member, and is connected and fixed to a vehicle body frame 30 with a connecting bolt (not shown) inserted through the inner cylinder 1.
The configuration of each part will be described. As shown in FIGS. 2, 7, 8, and 9, a cap shape in which the first rubber wall 50 is vulcanized and formed between the one end 2A of the outer cylinder 2 is shown. Of the inner cylinder 1 is press-fitted and fitted, and one liquid chamber 4A (hereinafter referred to as “lower liquid chamber 4A”) is connected to the first rubber wall 50 and the first rubber wall 50. It is formed between a circular ring-shaped orifice forming member 52 provided between the inner and outer cylinders 1 and 2 so as to face each other, and the other liquid chamber 4B (hereinafter, “upper liquid chamber 4B”) is formed as an orifice forming member 52. And the second rubber wall 53 (see FIG. 1) provided on the opposite side of the first rubber wall 50 with the orifice forming member 52 interposed therebetween. More specifically, the lower liquid chamber 4A is formed around the one end 1A of the inner cylinder 1 over the entire circumference, the upper liquid chamber 4B is formed around the inner cylinder 1 over the entire circumference, and the upper liquid chamber 4B is formed. It is formed between the pair of first inclined wall portions 42 and the rubber-like elastic body 3 in the circumferential direction of the inner and outer cylinders 1 and 2.
The cylindrical resin material 54 integrally provided with the first inclined wall portion 42 is press-fitted and fitted into the inner cylinder 1, and the end portion 54 </ b> A of the cylindrical resin material 54 is received and supported by the end portion 51 </ b> A of the cylindrical metal fitting 51. As shown in FIGS. 10 and 11, a predetermined portion of the straight cylindrical intermediate cylinder 7 is recessed inwardly in the radial direction so that the vertical cross-sectional shape is a “<” shape. A second inclined wall 44 is formed on the surface. Liquid is also sealed between the back surface of the second inclined wall portion 44 and the outer cylinder 2 (see FIG. 2).
The orifice forming member 52 includes a cylindrical portion 55 that forms the orifice 5 with the inner cylinder 1, and a flange 56 that projects radially outward from one end of the cylindrical portion 55. The outer peripheral portion is sandwiched and fixed by one end portion 57 of the intermediate cylinder 7 and a step portion 58 made of a rubber member vulcanized and formed on the inner peripheral surface of the outer cylinder 2 on the one end portion 2A side, and the first rubber wall 50 is lowered. Set the posture of the flange 56 so that the vertical cross-sectional shape of the flange 56 is substantially in line with the vertical cross-sectional shape of the first rubber wall 50 while setting the convex cross-sectional arc shape to the side liquid chamber 4A side. is there. The other end 59 of the intermediate cylinder 7 is received in the axial direction by a bent part 60 formed at the other end 2B of the outer cylinder 2.
As shown in FIGS. 2, 7, 8, and 9, the flange 61 formed on the one end 2 </ b> A of the outer cylinder 2 is formed on the stopper fitting 31 that projects from the one end 1 </ b> A side of the inner cylinder 1. The stopper rubber 62 is flow-molded so as to be positioned away from the stopper fitting 31 in the axial direction. The stopper fitting 31 is formed in a ring disk shape, and is clamped and fixed between the head of the connecting bolt and one end of the inner cylinder 1 (specifically, a washer 32).
As shown in FIGS. 2, 4, 5, and 6, the pair of first cylindrical wall portions 42 are positioned across the axis O of the inner cylinder 1 from a direction different from the pair of first inclined wall portions 42. The stopper 13 is bulged and formed at the end 54B of the resin material 54 on the other end 1B side of the inner cylinder 1, and the inner circumference of the rubber that forms the chamber wall of the upper liquid chamber 4B on the inner circumference of the intermediate cylinder 7 The wall 63 is formed by vulcanization, and a pair of straight holes 64 positioned on the radially outer side of the pair of stoppers 13 are formed in the rubber inner wall 63. The other direction is a direction orthogonal to the direction in which the pair of first inclined wall portions 42 sandwich the axis O. The pair of straight holes 64 have an arc shape in plan view, and are formed in deep holes whose bottoms reach the vicinity of the upper end of the cylindrical part 55 of the orifice forming member 52. The rubber-like elastic body 3, the second rubber wall 53, and the inner rubber wall 63 are integrally formed by vulcanization and continuous. The other end 1B side of the inner cylinder 1 is slightly extended outward in the radial direction. A ring disc-like stopper rubber 66 is fitted on the base portion of the overhang portion 65.
The first inclined surface 41 and the second inclined surface 43 are parallel to each other. The inclination angles θ1 and θ2 (see FIGS. 5 and 11) of the inner and outer cylinders 1 and 2 with respect to the axis O are set to 25 °. The first inclined surface 41 and the second inclined surface 43 do not overlap in the axial direction of the inner and outer cylinders 1 and 2.
When vibration is input to the liquid-filled vibration isolator having the above structure, the inner cylinder 1 and the outer cylinder 2 are relatively displaced, and the rubber-like elastic body 3, the first rubber wall 50, the second rubber wall 53, and the like are elastically deformed. As a result, the volumes of the two liquid chambers 4A and 4B change, and the liquid flows through the orifice 5. A vibration damping effect can be obtained by this liquid flow effect.
[Second Embodiment]
The liquid filled type vibration damping device of this embodiment is provided between a front member of a rear suspension of an automobile and a body frame. As shown in FIGS. 13 to 20, unlike the first embodiment, the pair of liquid chambers 4A and 4B is separated from the pair of first inclined wall portions 42 and the pair of second inclined wall portions 44. It arrange | positions so that it may be located on both sides of the inner cylinder 1 from the direction. The other direction is a direction orthogonal to the direction in which the pair of first inclined wall portions 42 sandwich the axis O. Hereinafter, the structure of the liquid filled type vibration damping device of the second embodiment will be described.
As shown in FIGS. 13, 14, and 15, the above-described liquid-filled vibration isolator includes an inner cylinder 1, an outer cylinder 2, an intermediate cylinder 7 fitted in the outer cylinder 2, and an intermediate cylinder A rubber-like elastic body 3 which is vulcanized and connected between the intermediate cylinder 7 and the inner cylinder 1, a pair of liquid chambers 4A and 4B having the rubber-like elastic body 3 as chamber walls, The liquid chambers 4A and 4B are provided with an orifice 5 for communicating with each other. As shown in FIG. 14, the liquid-filled vibration isolator having the above structure is press-fitted into the vertical collar 6 provided on the front member, and is connected and fixed to the vehicle body frame 30 with a connecting bolt B inserted through the inner cylinder 1.
The pair of rubber-like elastic bodies 3 are vulcanized and molded between the inner cylinder 1 and a vertical wall 9 described later of the intermediate cylinder 7 surrounding the inner cylinder 1. O is the axis of the inner cylinder 1, the intermediate cylinder 7, and the outer cylinder 2. As shown in FIGS. 18, 19, and 20, the intermediate tube 7 connects the pair of ring portions 8 on both ends in the axial direction to be in pressure contact with the outer tube 2 and the pair of ring portions 8. It consists of a pair of vertical walls 9 facing each other, and is opened between the vertical walls 9 in the circumferential direction of the intermediate cylinder 7. Further, the upper end portion is bent to form a flange 45. The pair of vertical walls 9 have a circular arc cross section and are positioned point-symmetrically with respect to the axis O of the intermediate cylinder 7. The structures of the inner cylinder 1 and the intermediate cylinder 7 will be described in more detail later.
The liquid chambers 4 </ b> A and 4 </ b> B are configured so that the space between one rubber-like elastic body 3 and the other rubber-like elastic body 3 in the circumferential direction of the inner and outer cylinders 1, 2 To a pair of rubber walls 11A and 11B facing each other. The rubber walls 11A and 11B are vulcanized and molded integrally with the rubber-like elastic body 3, and the inner peripheral surface of the ring portion 8 and the inner cylinder portion between the rubber-like elastic bodies 3 in the circumferential direction of the inner and outer cylinders 1 and 2 Is vulcanized and bonded.
The inner cylinder portion between the pair of rubber walls 11A and 11B is bulged and covered with a rubber member 12 connected to the rubber walls 11A and 11B. The stopper 13 suppresses the relative displacement between the inner cylinder 1 and the outer cylinder 2 within a predetermined range, and prevents excessive relative displacement between the inner cylinder 1 and the outer cylinder 2. A rubber film 14 covers the inner cylinder 1. This is continuous with the rubber walls 11A and 11B.
The inner cylinder 1 includes an inner cylinder body 15 in which a rubber-like elastic body 3 is interposed between the inner cylinder 1 and a cylinder member 18 that is press-fitted and fitted into one end 16 in the axial direction of the inner cylinder body 15. A flange 19 having a diameter larger than that of the one end portion 16 of the inner cylinder main body 15 is formed on the cylinder member 18, and one end surface 20 of the flange 19 is configured to abut on the mounting surface 35 of the vehicle body frame 30. Reference numeral 17 denotes a press-fit cylinder portion of the cylinder member 18. The cylindrical member 18 is formed by forging, and the one end face 20 of the flange 19 is roughened during forging.
As shown in FIGS. 16 to 20, the pair of first and second cylinders having a first inclined surface 41 positioned closer to the intermediate cylinder 7 toward the axial one ends 1 </ b> A and 2 </ b> A (upper end) of the inner and outer cylinders 1 and 2. One inclined wall portion 42 is provided on the outer peripheral side of the axially intermediate portion of the inner cylinder 1 so as to sandwich the axis O of the inner cylinder 1, and the other axial end 1 </ b> B of the inner and outer cylinders 1, 2. A pair of second inclined wall portions 44 having a second inclined surface 43 positioned on the inner cylinder 1 side toward the 2B (lower end) side are arranged on the inner peripheral side of the intermediate portion in the axial direction of the intermediate cylinder 7. The rubber-like elastic body 3 is interposed between the first inclined surface 41 and the second inclined surface 43 so as to be positioned between the pair of first inclined wall portions 42.
As shown in FIGS. 16 and 17, the first inclined wall portion 42 on the inner cylinder 1 side is formed by bulging the axially intermediate portion of the inner cylinder 1 so that the longitudinal cross-sectional shape becomes a triangular convex portion. It is. The upper surface of the first inclined wall portion 42 is perpendicular to the axis O of the inner cylinder main body 15. As shown in FIGS. 18, 19, and 20, the second inclined wall portion 44 on the side of the intermediate tube 7 is formed in the shape of “<” in the middle portion of the vertical wall 9 of the intermediate tube 7 (in a straight tube shape). Are recessed inward in the radial direction. The rubber-like elastic body 3 is also vulcanized and molded between the back surface of the vertical wall portion of the “<” shape and the outer cylinder portion, and the vertical wall portion is buried in the rubber-like elastic body 3. The orifice 5 is located between the back surface of the vertical wall portion and the outer cylinder portion.
The first inclined surface 41 and the second inclined surface 43 are parallel to each other. The inclination angles θ1, θ2 (see FIGS. 17 and 19) of the inner and outer cylinders 1, 2 with respect to the axis O are set to 25 °. The first inclined surface 41 and the second inclined surface 43 do not overlap in the axial direction of the inner and outer cylinders 1 and 2. The first inclined surface 41 and the second inclined surface 43 sandwich the rubber-like elastic body 3 in a direction intersecting with both the inclined surfaces 41 and 43. In the manufacturing process of the present apparatus, the outer cylinder 2 is reduced in diameter in a liquid in a state where the intermediate cylinder 7 and the like are accommodated, and both upper and lower ends are bent radially inward. As a result, the ring portion 8 of the intermediate cylinder 7 is pressed against the outer cylinder 2 as described above, and the liquid is sealed in the liquid chambers 4A and 4B. In FIG. 14, 32 is a washer that presses against the other end surface of the inner cylinder 1 (this surface is also roughened), and 31 is a stopper fitting that is interposed between the head of the connecting bolt B and the washer 32. , 33 is a stopper rubber, and when the inner cylinder 1 is greatly raised, the stopper fitting 31 hits the stopper rubber 33 and suppresses the displacement of the inner cylinder 1 within a predetermined range.
One end surface 20 of the flange 19 of the cylindrical member 18 is in pressure contact with the mounting surface 35 of the vehicle body frame 30 in a state in which the liquid-filled vibration isolator having the above structure is connected to the vehicle body frame 30. When vibration is input to this liquid-filled vibration isolator, the inner cylinder 1 and the outer cylinder 2 are relatively displaced, and the rubber-like elastic body 3, the rubber walls 11A, 11B and the like are elastically deformed, so that both the liquid chambers 4A, 4B The volume changes and the liquid flows through the orifice 5. A vibration damping effect can be obtained by this liquid flow effect.
The inventor manufactured a vibration isolator having the above structure and measured the spring constant of the rubber-like elastic body 3. FIG. 24 shows the measurement conditions and results, and FIGS. 21 and 22 show the structure of the main part of the measured liquid-filled vibration isolator. FIG. 21 is a longitudinal sectional view of the first embodiment showing the rubber-like elastic body 3, the inner cylinder main body 15, the intermediate cylinder 7, etc. before being fitted into the outer cylinder 2, and FIG. 22 is the outer cylinder 2. It is a longitudinal cross-sectional view of 2nd Example which shows the rubber-like elastic body 3, the inner cylinder main body 15, the intermediate | middle cylinder 7, etc. of the state before fitting internally.
24, 21 and 22, R1 is a radius on the lower end side of the inner cylinder body 15, and R2 is a maximum radius of the wall portion 42 on the inner cylinder 1 side (the protruding end of the wall portion 42 and the axis O and R3 is a radius on the lower end side of the intermediate cylinder 7, L1 is a length from the upper surface of the wall portion 42 on the inner cylinder 1 side to the lower end surface of the inner cylinder main body 15, and L2 is from the upper end of the second inclined surface 43. A length from the lower end of the second inclined surface 43 to a lower end of the inner cylinder main body 15 is indicated by a length L <b> 3 to the lower end of the inner cylinder main body 15. θ1 is the angle of the first inclined surface 41 with respect to the axis O of the inner cylinder body 15, and θ2 is the angle of the second inclined surface 43 with respect to the axis O of the intermediate cylinder 7. Ks (P) is the static spring constant of the rubber-like elastic body 3 in the axial direction (axial direction) of the inner cylinder main body 15, and Ks (R) is the rubber-like elasticity in the radial direction (axial perpendicular direction) of the inner cylinder main body 15. This is the static spring constant of the body 3.
According to the table of FIG. 24, in both Example 1 and Example 2, the static spring constant Ks (P) of the rubber-like elastic body 3 in the axial direction of the inner cylinder main body 15 increases, and Ks (P) / Ks ( R) also increased to 0.2 or more (0.1 to 0.15 for the conventional structure).
[Third Embodiment]
The vibration isolator of this embodiment is a type of vibration isolator that does not enclose liquid. As shown in FIG. 23, an inner cylinder 1, an outer cylinder 2, and a rubber-like elastic body 3 that is vulcanized and formed between the outer cylinder 2 and the inner cylinder 1 to connect the outer cylinder 2 and the inner cylinder 1. A pair of first inclined wall portions 42 provided with a first inclined surface 41 located on the outer cylinder 2 side toward the one axial end portions 1A and 2A of the inner and outer cylinders 1 and 2 are provided in the axial intermediate portion of the inner cylinder 1 2nd inclined surface which is provided so that it may be located in the outer peripheral part side on both sides of the axis O of the inner cylinder 1, and the axial direction other end parts 1B and 2B side of the inner and outer cylinders 1 and 2 may be located on the inner cylinder 1 side. A pair of second inclined wall portions 44 having 43 are provided on the inner peripheral side of the axially intermediate portion of the outer cylinder 2 so as to be positioned with the pair of first inclined wall portions 42 of the inner cylinder 1 interposed therebetween, The rubber-like elastic body 3 is interposed between the first inclined surface 41 and the second inclined surface 43. Members having the same reference numerals as those in FIGS. 1 to 12 described in the first embodiment are members having the same structure as the members in the first embodiment, and a detailed description thereof will be omitted.
[Another embodiment]
(1) A structure in which the inclination of the first inclined surface 41 and the second inclined surface 43 is opposite to that of the above embodiment may be employed. For example, in the first embodiment, a pair of first inclined wall portions provided with a first inclined surface 41 positioned closer to the intermediate tube 7 toward the axial upper end portions 1B and 2B (corresponding to one end portion) of the inner and outer tubes 1 and 2. 42 is provided on the outer peripheral side of the intermediate portion in the axial direction of the inner cylinder 1 so as to sandwich the axis O of the inner cylinder 1, and lower end portions 1A, 2A in the axial direction of the inner and outer cylinders 1 and 2 (the other end portion). A pair of second inclined wall portions 44 having a second inclined surface 43 positioned closer to the inner cylinder 1 side toward the inner cylinder 1 side, and a pair of inner cylinders 1 on the inner peripheral side of the intermediate portion in the axial direction of the intermediate cylinder 7. It may be provided so that it may be located on both sides of the first inclined wall portion 42, and the rubber-like elastic body 3 may be interposed between the first inclined surface 41 and the second inclined surface 43.
(2) In the above embodiment, the first inclined surface 41 and the second inclined surface 43 may not be parallel to each other. Moreover, the numerical value quoted by the above embodiment is an example, and another numerical value may be sufficient as it.

本第１及び第２発明によれば、自動車の操縦安定性をよくすることができ、しかも内外筒間のゴム状弾性体の耐久性を向上させることができる液封入式の防振装置を提供することができた。  According to the first and second aspects of the present invention, there is provided a liquid-filled vibration isolator capable of improving the steering stability of the automobile and improving the durability of the rubber-like elastic body between the inner and outer cylinders. We were able to.

Claims (8)

内筒（１）と、外筒（２）と、前記外筒（２）に内嵌する中間筒（７）と、前記中間筒（７）と内筒（１）の間に加硫成形されて中間筒（７）と内筒（１）を連結するゴム状弾性体（３）と、少なくとも一方側が前記ゴム状弾性体（３）を室壁とする一対の液室（４Ａ），（４Ｂ）と、前記一対の液室（４Ａ），（４Ｂ）同士を連通させるオリフィス（５）とを設けてある液封入式防振装置であって、
前記内外筒（１），（２）の軸方向一端部（１Ａ），（２Ａ）側ほど前記中間筒（７）側に位置する第１傾斜面（４１）を備えた一対の第１傾斜璧部（４２）を、前記内筒（１）の軸方向中間部の外周部側にその内筒（１）の軸芯（Ｏ）を挟んで位置するように設け、前記内外筒（１），（２）の軸方向他端部（１Ｂ），（２Ｂ）側ほど前記内筒（１）側に位置する第２傾斜面（４３）を備えた一対の第２傾斜璧部（４４）を、前記中間筒（７）の軸方向中間部の内周部側に前記内筒（１）の一対の第１傾斜璧部（４２）を挟んで位置するように設け、前記第１傾斜面（４１）と第２傾斜面（４３）との間に前記ゴム状弾性体（３）を介在させてある液封入式防振装置。The inner cylinder (1), the outer cylinder (2), the intermediate cylinder (7) fitted into the outer cylinder (2), and the intermediate cylinder (7) and the inner cylinder (1) are vulcanized. A rubber-like elastic body (3) connecting the intermediate cylinder (7) and the inner cylinder (1), and at least one side of the pair of liquid chambers (4A), (4B) having the rubber-like elastic body (3) as a chamber wall. ) And an orifice (5) for communicating the pair of liquid chambers (4A) and (4B) with each other,
A pair of first inclined walls provided with a first inclined surface (41) positioned closer to the intermediate cylinder (7) toward the one axial end (1A), (2A) side of the inner and outer cylinders (1), (2). A portion (42) is provided on the outer peripheral side of the axially intermediate portion of the inner cylinder (1) so as to sandwich the axis (O) of the inner cylinder (1), and the inner and outer cylinders (1), A pair of second inclined wall portions (44) provided with a second inclined surface (43) located on the inner cylinder (1) side toward the other axial end portion (1B), (2B) side of (2), The intermediate cylinder (7) is provided on the inner peripheral side of the intermediate portion in the axial direction so as to sandwich the pair of first inclined wall portions (42) of the inner cylinder (1), and the first inclined surface (41 ) And the second inclined surface (43), the rubber-like elastic body (3) is interposed. 前記外筒（２）の一端部（２Ａ）との間に第１ゴム壁（５０）を加硫成形した筒金具（５１）を前記内筒（１）の一端部（１Ａ）に外嵌し、一方の液室（４Ａ）を、前記第１ゴム壁（５０）と、この第１ゴム壁（５０）に対向するように内外筒（１），（２）間に設けたリング状のオリフィス形成部材（５２）との間に形成するとともに、他方の液室（４Ｂ）を、前記オリフィス形成部材（５２）と、このオリフィス形成部材（５２）を挟んで前記第１ゴム壁（５０）とは反対側に設けた第２ゴム壁（５３）との間に形成してある請求項１記載の液封入式防振装置。A cylindrical metal fitting (51) obtained by vulcanizing the first rubber wall (50) between the one end (2A) of the outer cylinder (2) is externally fitted to one end (1A) of the inner cylinder (1). A ring-shaped orifice provided with one liquid chamber (4A) between the first rubber wall (50) and the inner and outer cylinders (1), (2) so as to face the first rubber wall (50). The other liquid chamber (4B) is formed between the orifice forming member (52) and the first rubber wall (50) across the orifice forming member (52). The liquid filled type vibration damping device according to claim 1, wherein the device is formed between the second rubber wall and the second rubber wall provided on the opposite side. 前記一方の液室（４Ａ）を前記内筒（１）の一端部（１Ａ）の周りに全周にわたって形成し、前記他方の液室（４Ｂ）を前記内筒（１）の周りに全周にわたって形成し、かつ、前記内外筒（１），（２）の周方向で、前記一対の第１傾斜璧部（４２）及びゴム状弾性体（３）の間に形成し、前記第１傾斜璧部（４２）を一体に備えた筒状の樹脂材（５４）を前記内筒（１）に圧入外嵌し、前記筒金具（５１）の端部（５１Ａ）に前記筒状の樹脂材（５４）の端部（５４Ａ）を受止め支持させ、ストレート筒状の中間筒の所定の部分を径方向内方側に凹ませることで前記中間筒（７）に前記第２傾斜璧部（４４）を形成し、前記オリフィス形成部材（５２）を、前記内筒（１）との間に前記オリフィス（５）を形成する筒部（５５）と、この筒部（５５）の一端部から径方向外方側に張出すフランジ（５６）とから構成し、前記フランジ（５６）の外周部を、前記中間筒（７）の一端部（５７）と、前記外筒（２）の一端部（２Ａ）側の内周面に加硫成形したゴム部材から成る段部（５８）とで挟持固定し、前記第１ゴム璧（５０）を前記一方の液室（４Ａ）側に凸の断面円弧状に設定するとともに、前記フランジ（５６）の縦断面形状が前記第１ゴム璧（５０）の縦断面形状にほぼ沿った形状になるように前記フランジ（５６）の姿勢を設定してある請求項２記載の液封入式防振装置。The one liquid chamber (4A) is formed all around the one end (1A) of the inner cylinder (1), and the other liquid chamber (4B) is formed all around the inner cylinder (1). And formed between the pair of first inclined wall portions (42) and the rubber-like elastic body (3) in the circumferential direction of the inner and outer cylinders (1), (2). A cylindrical resin material (54) integrally provided with a wall portion (42) is press-fitted and fitted into the inner cylinder (1), and the cylindrical resin material is fitted to an end (51A) of the cylindrical metal fitting (51). The end portion (54A) of (54) is received and supported, and a predetermined portion of the straight cylindrical intermediate tube is recessed inward in the radial direction so that the second inclined wall portion ( 44), the orifice forming member (52), and the cylinder portion (55) forming the orifice (5) between the inner cylinder (1) and the cylinder A flange (56) projecting radially outward from one end of (55), and an outer periphery of the flange (56) is connected to one end (57) of the intermediate cylinder (7) and the outer The cylinder (2) is clamped and fixed to the inner peripheral surface of the one end (2A) side of the cylinder (2) with a step portion (58) made of a vulcanized rubber member, and the first rubber wall (50) is connected to the one liquid chamber ( 4A) the flange (56) is set to have a circular arc shape that is convex to the side, and the longitudinal cross-sectional shape of the flange (56) is substantially the same as the vertical cross-sectional shape of the first rubber wall (50). The liquid-filled vibration isolator according to claim 2, wherein the posture is set. 前記中間筒（７）の他端部（５９）を、前記外筒（２）の他端部（２Ｂ）に形成した折曲部（６０）に前記軸方向で受止めさせてある請求項３記載の液封入式防振装置。The other end (59) of the intermediate cylinder (7) is received in the axial direction by a bent part (60) formed at the other end (2B) of the outer cylinder (2). The liquid-filled vibration isolator as described. 前記外筒（２）の一端部（２Ａ）に張出し形成したフランジ（６１）に、前記内筒（１）の一端部側から張出すストッパ金具（３１）に対するストッパゴム（６２）を、前記軸方向で前記ストッパ金具（３１）から離間して位置するように加硫成形し、前記一対の第１傾斜璧部（４２）とは別の方向から内筒（１）の軸芯（Ｏ）を挟んで位置する一対のストッパ部（１３）を、前記内筒（１）の他端部（１Ｂ）側の樹脂材（５４）の端部（５４Ｂ）に膨出形成し、前記中間筒（７）の内周部に、前記他方の液室（４Ｂ）の室壁を形成するゴム内周璧（６３）を加硫成形し、前記ゴム内周璧（６３）に、前記一対のストッパ部（１３）の径方向外方側に位置する一対のすぐり穴（６４）を形成してある請求項１〜４のいずれか一つに記載の液封入式防振装置。A stopper rubber (62) against a stopper fitting (31) projecting from one end of the inner cylinder (1) is attached to a flange (61) projecting from one end (2A) of the outer cylinder (2). Vulcanized and molded so as to be spaced apart from the stopper fitting (31) in the direction, and the shaft core (O) of the inner cylinder (1) from a direction different from the pair of first inclined wall portions (42). A pair of stopper portions (13) positioned between the inner cylinder (1) is bulged and formed at the end (54B) of the resin material (54) on the other end (1B) side of the inner cylinder (1). ) Is vulcanized and molded on the inner peripheral portion of the other liquid chamber (4B), and the pair of stopper portions (63) are formed on the inner peripheral wall of the rubber (63). The liquid seal according to any one of claims 1 to 4, wherein a pair of straight holes (64) located on the radially outward side of 13) is formed. Shikibofu apparatus. 前記ゴム状弾性体（３）と第２ゴム壁（５３）とゴム内周璧（６３）とを一体に加硫成形して連ならせてある請求項５記載の液封入式防振装置。The liquid-filled vibration isolator according to claim 5, wherein the rubber-like elastic body (3), the second rubber wall (53), and the rubber inner peripheral wall (63) are integrally vulcanized and joined together. 前記一対の液室（４Ａ），（４Ｂ）を、前記一対の第１傾斜璧部（４２）及び一対の第２傾斜璧部（４４）とは別の方向から前記内筒（１）を挟んで位置するように配置してある請求項１記載の液封入式防振装置。The pair of liquid chambers (4A) and (4B) are sandwiched between the inner cylinder (1) from a direction different from the pair of first inclined wall portions (42) and the pair of second inclined wall portions (44). The liquid-filled vibration isolator according to claim 1, which is arranged so as to be located at 内筒（１）と、外筒（２）と、前記外筒（２）と内筒（１）の間に加硫成形されて外筒（２）と内筒（１）を連結するゴム状弾性体（３）とを設けてある防振装置であって、
前記内外筒（１），（２）の軸方向一端部（１Ａ），（２Ａ）側ほど前記外筒（２）側に位置する第１傾斜面（４１）を備えた一対の第１傾斜璧部（４２）を、前記内筒（１）の軸方向中間部の外周部側にその内筒（１）の軸芯（Ｏ）を挟んで位置するように設け、前記内外筒（１），（２）の軸方向他端部（１Ｂ），（２Ｂ）側ほど前記内筒（１）側に位置する第２傾斜面（４３）を備えた一対の第２傾斜璧部（４４）を、前記外筒（２）の軸方向中間部の内周部側に前記内筒（１）の一対の第１傾斜璧部（４２）を挟んで位置するように設け、前記第１傾斜面（４１）と第２傾斜面（４３）との間に前記ゴム状弾性体（３）を介在させてある防振装置。An inner cylinder (1), an outer cylinder (2), and a rubber-like material that is vulcanized and formed between the outer cylinder (2) and the inner cylinder (1) to connect the outer cylinder (2) and the inner cylinder (1). An anti-vibration device provided with an elastic body (3),
A pair of first inclined walls provided with a first inclined surface (41) located on the outer cylinder (2) side toward the axial one end (1A), (2A) side of the inner and outer cylinders (1), (2). A portion (42) is provided on the outer peripheral side of the axially intermediate portion of the inner cylinder (1) so as to sandwich the axis (O) of the inner cylinder (1), and the inner and outer cylinders (1), A pair of second inclined wall portions (44) provided with a second inclined surface (43) located on the inner cylinder (1) side toward the other axial end portion (1B), (2B) side of (2), Provided on the inner peripheral side of the axially intermediate portion of the outer cylinder (2) so as to sandwich the pair of first inclined wall portions (42) of the inner cylinder (1), and the first inclined surface (41 ) And the second inclined surface (43), the rubber-like elastic body (3) is interposed.
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