JP2007093010A - Vibration-proofing bush - Google Patents

Vibration-proofing bush Download PDF

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JP2007093010A
JP2007093010A JP2006288182A JP2006288182A JP2007093010A JP 2007093010 A JP2007093010 A JP 2007093010A JP 2006288182 A JP2006288182 A JP 2006288182A JP 2006288182 A JP2006288182 A JP 2006288182A JP 2007093010 A JP2007093010 A JP 2007093010A
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vibration
bush
inner cylinder
base
cylinder
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JP2006288182A
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秀夫 ▲但▼野
Hideo Tadano
Akihiko Kato
明彦 加藤
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Priority to JP2006288182A priority Critical patent/JP2007093010A/en
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  • Vehicle Body Suspensions (AREA)
  • Combined Devices Of Dampers And Springs (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To easily perform positioning around a shaft in mounting a vibration-proofing bush. <P>SOLUTION: A recessed portion 8 is formed on an axial end face of a vibration-proofing base 3. The vibration-proofing bush is correctly positioned around the shaft while using the recessed portion 8 as a landmark. Thus, wrong mounting to a car body side and a vibrating source side can be prevented, and the vibration-proofing bush exercises a prescribed function. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、例えば自動車のデファレンシャルやエンジンの支持機構、あるいはサスペンション機構等の一部に組み込まれて、車体側に伝達される振動を減衰するための防振ブッシュに関するものである。   The present invention relates to an anti-vibration bush that is incorporated in a part of, for example, an automobile differential, an engine support mechanism, or a suspension mechanism to attenuate vibration transmitted to a vehicle body.

一般に、自動車のデファレンシャルやエンジンの支持機構、あるいはサスペンション機構等の一部には、車体側に伝達される振動を減衰するための防振ブッシュが組み込まれることがある。図６に防振ブッシュの一例（軸直角方向断面図）を示す。   In general, an anti-vibration bush for attenuating vibration transmitted to the vehicle body side may be incorporated in a part of a vehicle differential, an engine support mechanism, a suspension mechanism, or the like. FIG. 6 shows an example of the anti-vibration bush (cross-sectional view perpendicular to the axis).

この防振ブッシュは、内筒１０１と、内筒１０１の外方に配置された外筒１０２と、内外筒１０１、１０２間に介設されたゴム状弾性体製の防振基体１０３と、防振基体１０３の外周部に形成された主液室１０４及び副液室１０５と、防振基体１０３の外周側に形成されて両液室１０４、１０５を連通させるオリフィス１０６とを備えており、液室１０４、１０５内に液が封入されて液封入式防振ブッシュとされている。   The anti-vibration bush includes an inner cylinder 101, an outer cylinder 102 disposed outside the inner cylinder 101, an anti-vibration base 103 made of a rubber-like elastic body interposed between the inner and outer cylinders 101, 102, and an anti-vibration base. A main liquid chamber 104 and a sub liquid chamber 105 formed on the outer peripheral portion of the vibration base 103; and an orifice 106 formed on the outer peripheral side of the vibration isolation base 103 to communicate the two liquid chambers 104 and 105. A liquid is sealed in the chambers 104 and 105 to form a liquid-filled vibration isolating bush.

内筒１０１は、その内部を挿通する軸部材により、例えば車両側ブラケット等に取り付けられる。外筒１０２は、例えば連結ロッドの一端側筒体に圧入固定される。この連結ロッドの他端側がエンジン等の振動源に取り付けられて、防振ブッシュが車体側と振動源側とを防振的に連結するようになっている。また、主液室１０４及び副液室１０５は、内筒１０１を挟んで形成されており、各液室１０４、１０５の中央部が例えば連結ロッドの軸線上に位置するように、防振ブッシュが内筒１０１の軸周りに位置決めされる。   The inner cylinder 101 is attached to, for example, a vehicle-side bracket or the like by a shaft member that passes through the inner cylinder 101. The outer cylinder 102 is press-fitted and fixed to, for example, one end side cylinder of the connecting rod. The other end side of the connecting rod is attached to a vibration source such as an engine, and a vibration isolating bush connects the vehicle body side and the vibration source side in an anti-vibration manner. Further, the main liquid chamber 104 and the sub liquid chamber 105 are formed with the inner cylinder 101 sandwiched therebetween, and the anti-vibration bush is provided so that the central portion of each of the liquid chambers 104 and 105 is positioned on the axis of the connecting rod, for example. It is positioned around the axis of the inner cylinder 101.

内外筒１０１、１０２が連結ロッドの軸方向に相対的に振動したとき、各液室１０４、１０５の容積が変化し、この容積変化に伴ってオリフィス１０６内を液が往復して、内外筒１０１、１０２の振動を減衰する。一方、内外筒１０１、１０２が連結ロッドの軸直角方向に相対的に振動したときには、各液室１０４、１０５の容積が変化しないため、液の流動による減衰効果は小さい。   When the inner and outer cylinders 101 and 102 vibrate relative to each other in the axial direction of the connecting rod, the volumes of the liquid chambers 104 and 105 change, and the liquid reciprocates in the orifice 106 in accordance with the volume changes. , 102 is damped. On the other hand, when the inner and outer cylinders 101 and 102 are relatively vibrated in the direction perpendicular to the axis of the connecting rod, the volume of each of the liquid chambers 104 and 105 does not change, so that the damping effect due to the flow of the liquid is small.

また、液封入式以外の防振ブッシュでは、防振基体の一部に、異硬度ゴムを配置して、内筒の軸方向に直交する二方向（例えば連結ロッドの軸方向と、それに直交する方向）のばね定数が異なるように設定することがある。   Further, in a vibration-proof bushing other than the liquid-filled type, rubber of different hardness is arranged on a part of the vibration-proof base, and two directions orthogonal to the axial direction of the inner cylinder (for example, the axial direction of the connecting rod and the orthogonal direction to it) (Direction) may be set differently.

ところで、内筒の軸方向に直交する二方向の減衰性能やばね定数が異なる防振ブッシュは、車体側及び振動源側に取り付けるとき、その軸周りに正確に位置決めする必要がある。しかし、外筒が取り付けられた状態の防振ブッシュは、その軸周りの向きがわかりにくいため、車体側や振動源側に誤装着して所定の機能を発揮できなくなる恐れがある。   By the way, when the anti-vibration bushes having different damping performances and spring constants in two directions orthogonal to the axial direction of the inner cylinder are attached to the vehicle body side and the vibration source side, it is necessary to accurately position around the axis. However, since the anti-vibration bush with the outer cylinder attached is difficult to determine the direction around the axis, there is a risk that the anti-vibration bush may be mismounted on the vehicle body side or the vibration source side to perform a predetermined function.

本発明は、外筒が取り付けられた状態の軸周りの向きをわかりやすくして、車体側や振動源側への誤装着を防止することができる防振ブッシュを提供することを目的とする。   An object of the present invention is to provide an anti-vibration bush that makes it easy to understand the direction around an axis in a state where an outer cylinder is attached, and can prevent erroneous mounting on a vehicle body side or a vibration source side.

上記目的を達成するため、本発明は、車両側ブラケット等に取り付けられる内筒と、該内筒の外方に配置された外筒と、内外筒間に介設されたゴム状弾性体製の防振基体とを備え、前記内筒の軸方向と直交する二方向のばね定数及び減衰性能のうち少なくともいずれかが異なるように設定された防振ブッシュにおいて、防振ブッシュの軸方向端面に、軸周りに位置決めするための位置決め手段が設けられたことを特徴とする防振ブッシュを提供するものである。   In order to achieve the above object, the present invention provides an inner cylinder attached to a vehicle side bracket or the like, an outer cylinder disposed outside the inner cylinder, and a rubber-like elastic body interposed between the inner and outer cylinders. An anti-vibration base, and in an anti-vibration bush set so that at least one of the spring constant and damping performance in two directions orthogonal to the axial direction of the inner cylinder is different, on the axial end surface of the anti-vibration bush, It is an object of the present invention to provide an anti-vibration bush provided with positioning means for positioning around an axis.

この構成によれば、防振ブッシュの軸方向端面に位置決め手段を設けるため、位置決め手段を目印にして、防振ブッシュの軸周りの向きをわかりやすくし、外筒が取り付けられた状態の防振ブッシュを車両側ブラケットや振動源側に装着するときに、防振ブッシュを軸周りに正確に位置決めすることができる。そのため、車体側や振動源側への誤装着を防止して、装着状態の防振ブッシュを所定のばね定数及び減衰性能に設定し、防振ブッシュが所定の機能を発揮できるようにすることができる。   According to this configuration, since the positioning means is provided on the axial end face of the vibration isolating bush, the positioning means is used as a mark to make it easy to understand the direction around the axis of the vibration isolating bush, and the vibration isolating apparatus with the outer cylinder attached. When the bush is mounted on the vehicle side bracket or the vibration source side, the vibration isolating bush can be accurately positioned around the axis. Therefore, it is possible to prevent erroneous mounting on the vehicle body side or the vibration source side, set the vibration-proof bushing in a mounted state to a predetermined spring constant and damping performance, and allow the vibration-proof bushing to perform a predetermined function. it can.

この位置決め手段を用いた具体的な位置決めの方法としては、例えば連結ロッドの筒体等に外筒を圧入するときに、筒体側の目印と位置決め手段とを手で合わせてから圧入したり、防振ブッシュを筒体に圧入するためのロボットで防振ブッシュを把持するときに、位置決め手段を目印にすればよい。   As a specific positioning method using this positioning means, for example, when the outer cylinder is press-fitted into the cylinder or the like of the connecting rod, the mark on the cylinder side and the positioning means are aligned with each other by hand, When the vibration isolating bush is gripped by a robot for press-fitting the vibration bushing into the cylinder, the positioning means may be used as a mark.

上記の防振ブッシュの位置決め手段を、防振基体の軸方向端面に形成すれば、防振基体の加硫成形型を所定の形状にすることにより、防振基体の所定の位置に位置決め手段を設けることができ、防振ブッシュの製造をより簡単にすることができる。   If the positioning means of the vibration isolating bush is formed on the axial end surface of the vibration isolating base, the positioning means is placed at a predetermined position of the vibration isolating base by making the vulcanization mold of the vibration isolating base into a predetermined shape. The vibration-proof bushing can be made easier.

つまり、内筒の軸方向と直交する二方向のばね定数及び減衰性能のうち少なくともいずれかが異なる場合には、防振基体が軸周りに非対称な形状とされる。この場合、内筒又は外筒に位置決め手段としての突起や凹部を設けてもよいが、内筒の周囲に防振基体を加硫成形するときに、あるいは、防振基体の外周側に外筒を配置するときに、内筒又は外筒の位置決め手段を防振基体の軸周りに位置決めする必要がある。これに対して、位置決め手段を防振基体に設ければ、防振基体と位置決め手段との位置決め作業を省略することができる。   That is, when at least one of the spring constant and the damping performance in two directions orthogonal to the axial direction of the inner cylinder are different, the anti-vibration base has an asymmetric shape around the axis. In this case, the inner cylinder or the outer cylinder may be provided with projections or recesses as positioning means, but when the vibration-proofing base is vulcanized around the inner cylinder or on the outer peripheral side of the vibration-proofing base. When positioning the inner cylinder or the outer cylinder, it is necessary to position the positioning means of the inner cylinder or the outer cylinder around the axis of the vibration isolating base. On the other hand, if the positioning means is provided on the vibration isolating base, the positioning work between the vibration isolating base and the positioning means can be omitted.

上記の防振ブッシュの位置決め手段を、防振基体の軸方向端面において内筒の周囲に形成された凹部とすれば、内筒の軸方向長さを短くすることができ、車体側組付時の省スペース化を図ることができる。   If the positioning means of the vibration isolating bushing is a recess formed around the inner cylinder on the axial end surface of the vibration isolating base, the axial length of the inner cylinder can be shortened. Can be saved.

つまり、位置決め手段として、防振基体の軸方向端面に凸部を形成してもよいが、この場合、その凸部の長さだけ内筒が長くなる。これに対して、内筒の周りに凹部を形成すれば、凸部を形成する場合よりも内筒の長さを短くすることができる。なお、この凹部は、例えば液室の軸方向端部を覆う部分のように、防振基体のうちの大きな力が作用しない部分に形成すればよい。   That is, as the positioning means, a convex portion may be formed on the end surface in the axial direction of the vibration-proof base, but in this case, the inner cylinder becomes longer by the length of the convex portion. On the other hand, if the concave portion is formed around the inner cylinder, the length of the inner cylinder can be made shorter than when the convex portion is formed. In addition, what is necessary is just to form this recessed part in the part to which the big force does not act among vibration-proof bases, for example like the part which covers the axial direction edge part of a liquid chamber.

この凹部を車両側ブラケット等に形成された係合凸部に係合位置決めするようにすれば、車両側ブラケット等への誤装着を防止することができる。例えば、連結ロッド等に外筒を圧入固定し、その後に内筒を車両側ブラケット等に取り付けるとき、外筒を連結ロッド等に軸周りの方向を誤って圧入固定した場合には、防振ブッシュの凹部が係合凸部に係合しないため、車両側ブラケット等への装着が阻止される。   If the concave portion is engaged and positioned with an engaging convex portion formed on the vehicle side bracket or the like, erroneous mounting on the vehicle side bracket or the like can be prevented. For example, when the outer cylinder is press-fitted and fixed to a connecting rod, etc., and then the inner cylinder is attached to a vehicle-side bracket or the like, if the outer cylinder is accidentally press-fitted and fixed to the connecting rod etc. Is not engaged with the engaging convex portion, so that mounting on the vehicle side bracket or the like is prevented.

内筒の軸方向と直交する二方向のばね定数及び減衰性能のうち少なくともいずれかが異なるように設定された防振ブッシュとして、液封入式防振装置を適用すれば、本発明の好適な実施態様を提供することができる。すなわち、本発明は、前記防振基体の外周部に、内筒を挟んで一対の空間部が形成され、該空間部が外筒により被覆されることにより、液を封入する主液室と副液室とが形成され、該主液室と副液室とを連通するオリフィスが前記防振基体の外周側に形成された液封入式の防振ブッシュを提供する。   If a liquid-filled vibration isolator is applied as an anti-vibration bush that is set so that at least one of the spring constant and the damping performance in two directions orthogonal to the axial direction of the inner cylinder is different, the preferred implementation of the present invention Embodiments can be provided. That is, according to the present invention, a pair of space portions are formed on the outer peripheral portion of the vibration-isolating base with an inner cylinder interposed therebetween, and the space portions are covered with the outer cylinder, so that the main liquid chamber and the sub liquid chamber that enclose the liquid are enclosed. There is provided a liquid-filled vibration-proof bushing in which a liquid chamber is formed and an orifice communicating the main liquid chamber and the sub-liquid chamber is formed on the outer peripheral side of the vibration-proof base.

以上の説明から明らかな通り、本発明では、防振ブッシュの軸方向端面に位置決め手段を設けるため、防振基体が外筒で覆われて軸周りの方向がわかりにくい状態の防振ブッシュを軸周りに位置決めして、防振ブッシュの誤装着を防止することができる。   As is clear from the above description, in the present invention, since the positioning means is provided on the axial end face of the vibration isolating bush, the vibration isolating bush is covered with the outer cylinder and the direction around the shaft is difficult to understand. Positioning around can prevent erroneous mounting of the anti-vibration bush.

その結果、液室及びオリフィスが形成されて軸直角方向のうちの所定方向の振動に対する減衰性能が大きくされた防振ブッシュのように、内筒の軸方向に直交する二方向の減衰性能やばね定数が異なる防振ブッシュを軸周りに位置決めし、この防振ブッシュに所定の機能を発揮させることができる。   As a result, the damping performance and springs in two directions perpendicular to the axial direction of the inner cylinder, such as an anti-vibration bush in which a liquid chamber and an orifice are formed and the damping performance against vibration in a predetermined direction out of the direction perpendicular to the axis is increased. It is possible to position anti-vibration bushes having different constants around the shaft and to exert predetermined functions on the anti-vibration bushes.

また、防振基体の軸方向端面に凹部を形成して、この凹部を位置決め手段とすることにより、軸方向端面に位置決め手段としての凸部を形成する場合よりも内筒の軸方向長さを短くすることができ、防振ブッシュを車体側に装着したときの省スペース化を図ることができる。   In addition, by forming a recess on the axial end surface of the vibration isolating base and using the recess as a positioning means, the axial length of the inner cylinder can be increased as compared with the case of forming a convex portion as the positioning means on the axial end surface. It can be shortened, and space saving can be achieved when the vibration isolating bush is mounted on the vehicle body side.

以下、本発明に係る実施の形態について、図面を用いて説明する。図１は本発明に係る防振ブッシュの実施形態を示す分解斜視図、図２はその正面図、図３はそのＡ−Ａ断面図、図４はそのＢ−Ｂ断面図である。   Embodiments according to the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of an anti-vibration bush according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is an AA sectional view thereof, and FIG. 4 is a BB sectional view thereof.

この防振ブッシュは、内筒１と、内筒１の外方に配置された外筒２と、内外筒１、２間に介設されたゴム状弾性体製の防振基体３と、防振基体３の外周部に形成された主液室４及び副液室５と、防振基体３の外周側に形成されて両液室４、５を連通させるオリフィス６とを備えており、液室４、５内に液が封入されて液封入式の防振ブッシュとされている。   The anti-vibration bush includes an inner cylinder 1, an outer cylinder 2 disposed outside the inner cylinder 1, a rubber-like elastic anti-vibration base 3 interposed between the inner and outer cylinders 1, 2, A main liquid chamber 4 and a sub liquid chamber 5 formed on the outer peripheral portion of the vibration base 3, and an orifice 6 formed on the outer peripheral side of the vibration isolation base 3 to communicate both the liquid chambers 4 and 5. A liquid is sealed in the chambers 4 and 5 to form a liquid-filled vibration-proof bush.

内筒１は、例えば鋼製の円筒状とされ、その内部をボルト１８が挿通して、後述する車体側ブラケット１６に固定される。外筒２は、例えば鋼製の円筒状とされ、後述する連結ロッド１４の一端側の筒体１５に圧入固定される。この連結ロッド１４の他端側が例えばエンジン等の振動源側に取り付けられて、防振ブッシュが車体側と振動源側とを防振的に連結するようになっている。   The inner cylinder 1 has a cylindrical shape made of, for example, steel, and a bolt 18 is inserted through the inner cylinder 1 to be fixed to a vehicle body side bracket 16 described later. The outer cylinder 2 is made of, for example, a steel cylinder, and is press-fitted and fixed to a cylinder 15 on one end side of a connecting rod 14 described later. The other end side of the connecting rod 14 is attached to a vibration source side of an engine or the like, for example, and an anti-vibration bush connects the vehicle body side and the vibration source side in an anti-vibration manner.

防振基体３は、その内周側が内筒１の外周側に固着され、外周側に中間筒７が固着されるように、内筒１と中間筒７との間に加硫成形され、内筒１と中間筒７とを結合する。この防振基体３の軸方向端面で内筒１の周囲には、液室４、５と軸直角方向の位置を合わせて二つの凹部８が形成され、この凹部８が防振ブッシュを軸周りに位置決めするための位置決め手段とされる。なお、凹部８の数は二つに限らずいくつであってもよい。   The anti-vibration base 3 is vulcanized and molded between the inner cylinder 1 and the intermediate cylinder 7 so that the inner peripheral side is fixed to the outer peripheral side of the inner cylinder 1 and the intermediate cylinder 7 is fixed to the outer peripheral side. The cylinder 1 and the intermediate cylinder 7 are coupled. Two recesses 8 are formed around the inner cylinder 1 at the axial end face of the vibration isolating base 3 so as to align with the liquid chambers 4 and 5 in the direction perpendicular to the axis. The positioning means is used for positioning. The number of the recesses 8 is not limited to two and may be any number.

中間筒７は、例えば鋼製の略円筒状とされ、その外方に配置した外筒２を縮径することにより、中間筒７の軸方向両端部の外周面が外筒２の内周面に固定され、中間筒７を介して、内外筒１、２が防振基体３で連結される。中間筒７の軸方向中央部で内筒１を挟んだ両側には、一対の略長方形の開口部９が形成され、この開口部９から防振基体３に、外筒２で被覆される空間部１０が凹設されている。空間部１０は、外筒２の縮径を液槽内で行うことにより、内部に液を封入されて主液室４及び副液室５を構成する。   The intermediate cylinder 7 is formed, for example, in a substantially cylindrical shape made of steel, and by reducing the diameter of the outer cylinder 2 disposed outside the intermediate cylinder 7, the outer peripheral surfaces of both axial ends of the intermediate cylinder 7 are the inner peripheral surfaces of the outer cylinder 2. The inner and outer cylinders 1 and 2 are connected to each other by the vibration isolation base 3 through the intermediate cylinder 7. A pair of substantially rectangular openings 9 are formed on both sides of the intermediate cylinder 7 in the axial direction center portion with the inner cylinder 1 interposed therebetween, and the space that is covered with the outer cylinder 2 from the openings 9 to the vibration isolation base 3. The part 10 is recessed. The space portion 10 is configured to form a main liquid chamber 4 and a sub liquid chamber 5 by enclosing a liquid therein by reducing the diameter of the outer cylinder 2 in the liquid tank.

中間筒７の軸方向中央部で両開口部９間は、軸直角方向内方に折曲され、その外周部と外筒２の内周面との間に所定の大きさの隙間が形成されている。中間筒７の一方の外周部には、外筒２との隙間に収まる深さのオリフィス溝１１が形成され、このオリフィス溝１１と外筒２とで囲まれた空間が、両液室４、５を連通させるオリフィス６とされる。   The opening 9 is bent inward in the direction perpendicular to the axis at the center in the axial direction of the intermediate cylinder 7, and a gap of a predetermined size is formed between the outer peripheral part and the inner peripheral surface of the outer cylinder 2. ing. An orifice groove 11 having a depth that fits in a gap with the outer cylinder 2 is formed on one outer peripheral portion of the intermediate cylinder 7, and a space surrounded by the orifice groove 11 and the outer cylinder 2 is formed in both liquid chambers 4, The orifice 6 is made to communicate with 5.

オリフィス溝１１は、オリフィス６が周方向に１往復半して両液室４、５を連通させるように、内筒１の軸方向に蛇行状に形成されている。また、中間筒７の他方の外周部には、外筒２との隙間に収まる高さの隔壁１２が形成され、両液室４、５を遮断している。   The orifice groove 11 is formed in a meandering shape in the axial direction of the inner cylinder 1 so that the orifice 6 is reciprocated once and a half in the circumferential direction to connect the liquid chambers 4 and 5. Further, a partition wall 12 having a height that fits in a gap with the outer cylinder 2 is formed on the other outer peripheral portion of the intermediate cylinder 7, and both the liquid chambers 4 and 5 are shut off.

主液室４内及び副液室５内には、内筒１の軸方向中央部の外周面に固着されたストッパ１３が突出されている。このストッパ１３は、例えば合成樹脂製とされ、その表面を防振基体３と連続するゴム状弾性体で覆われて、液が流動するときの摩擦抵抗を大きくすると共に、内外筒１、２の相対的な変位が大きくなったときに外筒２の内周面に当接してその変位を規制する。   In the main liquid chamber 4 and the sub liquid chamber 5, a stopper 13 fixed to the outer peripheral surface of the central portion in the axial direction of the inner cylinder 1 protrudes. The stopper 13 is made of, for example, a synthetic resin, and its surface is covered with a rubber-like elastic body that is continuous with the vibration-isolating base 3 to increase the frictional resistance when the liquid flows, and When the relative displacement is increased, the displacement comes into contact with the inner peripheral surface of the outer cylinder 2.

次に、この防振ブッシュを車体側ブラケット及び連結ロッドに装着するときの様子を説明する。図５は防振ブッシュの装着状態を示す側面図である。まず、外筒２を連結ロッド１４の一端側の筒体１５に圧入固定して、防振ブッシュを連結ロッド１４に装着する。このとき、防振基体３の軸方向端面の凹部８を目印にして、連結ロッド１４に対して、防振ブッシュを軸周りに位置決めする。この位置決め方法としては、筒体１５に設けた目印に凹部８を手で合わせる方法や、ロボットで把持するときの目印として凹部８を利用する方法等どのようなものであってもよい。   Next, a state when the vibration isolating bush is mounted on the vehicle body side bracket and the connecting rod will be described. FIG. 5 is a side view showing a mounted state of the vibration isolating bush. First, the outer cylinder 2 is press-fitted and fixed to the cylinder 15 on one end side of the connecting rod 14, and the vibration isolating bush is attached to the connecting rod 14. At this time, the anti-vibration bush is positioned around the axis with respect to the connecting rod 14 using the concave portion 8 on the axial end face of the anti-vibration base 3 as a mark. As this positioning method, any method such as a method of manually aligning the concave portion 8 with a mark provided on the cylinder 15 or a method of using the concave portion 8 as a mark when gripped by a robot may be used.

次いで、内筒１を二枚の車体側ブラケット１６間に軸方向に挟挿する。車体側ブラケット１６の互いに対向する面には、所定の位置に係合凸部１７が形成されており、この係合凸部１７に防振基体３の凹部８を位置合わせして、防振ブッシュを軸周りに位置決めする。   Next, the inner cylinder 1 is sandwiched between the two vehicle body side brackets 16 in the axial direction. Engagement projections 17 are formed at predetermined positions on the mutually opposing surfaces of the vehicle body side bracket 16. The recesses 8 of the vibration isolation base 3 are aligned with the engagement projections 17, and the vibration isolation bushing is positioned. Is positioned around the axis.

ボルト１８を車体側ブラケット１６のボルト孔及び内筒１の内部に挿通させ、このボルト１８にナット１９を螺合して、内筒１を車体側ブラケット１６間に締結する。このとき、ボルト１８の締結力によって車体側ブラケット１６が内向きに変位し、防振ブッシュの凹部８に車体側ブラケット１６の係合凸部１７が係合する。   The bolt 18 is inserted into the bolt hole of the vehicle body side bracket 16 and the inside of the inner cylinder 1, and a nut 19 is screwed into the bolt 18 to fasten the inner cylinder 1 between the vehicle body side bracket 16. At this time, the vehicle body side bracket 16 is displaced inward by the fastening force of the bolt 18, and the engagement convex portion 17 of the vehicle body side bracket 16 is engaged with the concave portion 8 of the vibration isolating bush.

連結ロッド１４の筒体１５への装着時に、防振ブッシュを軸周りに誤って位置決めしてした場合、連結ロッド１４の他端側をエンジン等の振動源側に取り付けた状態では、車体側ブラケット１６に対して防振ブッシュを正しく位置決めすることができない。このとき、係合凸部１７と凹部８とが係合しないため、防振ブッシュの車体側ブラケット１６への装着を阻止して、防振ブッシュの誤装着を防止する。   When the anti-vibration bushing is mistakenly positioned around the shaft when the connecting rod 14 is mounted on the cylinder 15, the vehicle body side bracket is attached when the other end side of the connecting rod 14 is attached to the vibration source side of the engine or the like. The anti-vibration bush cannot be correctly positioned with respect to 16. At this time, since the engaging convex portion 17 and the concave portion 8 do not engage with each other, the mounting of the vibration isolating bushing on the vehicle body side bracket 16 is prevented to prevent erroneous mounting of the vibration isolating bushing.

この防振ブッシュは、連結ロッド１４及び車体側ブラケット１６に装着した状態で、内筒１を挟んで設けられた主液室４及び副液室５の中央部が連結ロッドの軸線上に位置するように設定されている。内外筒１、２が連結ロッド１４の軸方向に相対的に振動したとき、各液室４、５の容積が変化し、この容積変化に伴ってオリフィス６内を液が往復して、内外筒１、２の振動を減衰する。一方、内外筒１、２が連結ロッドの軸直角方向に相対的に振動したときには、各液室４、５の容積が変化しないため、液の流動による減衰効果は小さい。   In the state where the vibration isolating bush is mounted on the connecting rod 14 and the vehicle body side bracket 16, the central portions of the main liquid chamber 4 and the sub liquid chamber 5 provided on the inner cylinder 1 are positioned on the axis of the connecting rod. Is set to When the inner and outer cylinders 1 and 2 vibrate relative to each other in the axial direction of the connecting rod 14, the volumes of the liquid chambers 4 and 5 change, and the liquid reciprocates in the orifice 6 along with the volume change. Damping vibrations 1 and 2. On the other hand, when the inner and outer cylinders 1 and 2 are relatively vibrated in the direction perpendicular to the axis of the connecting rod, the volume of each of the liquid chambers 4 and 5 does not change.

なお、本発明は、上記の実施の形態に限定されるものではなく、本発明の範囲内において、適宜変更を加えることができる。例えば、この防振ブッシュは、液封入式以外の防振ブッシュであってもよく、防振基体の一部に、異硬度ゴムを配置して、内筒の軸方向に直交する二方向（例えば連結ロッドの軸方向と、それに直交する方向）のばね定数が異なるように設定した防振ブッシュに位置決め手段を設けてもよい。   In addition, this invention is not limited to said embodiment, A change can be suitably added within the scope of the present invention. For example, this anti-vibration bush may be a non-liquid-sealed anti-vibration bush, in which a rubber having a different hardness is arranged on a part of the anti-vibration base, and two directions perpendicular to the axial direction of the inner cylinder (for example, Positioning means may be provided on the vibration isolating bush set so that the spring constants in the connecting rod axial direction and the direction orthogonal thereto are different.

本発明に係る防振ブッシュの実施形態を示す分解斜視図1 is an exploded perspective view showing an embodiment of an anti-vibration bush according to the present invention. その正面図Front view そのＡ−Ａ断面図AA sectional view そのＢ−Ｂ断面図BB cross section 防振ブッシュの装着状態を示す側面図Side view showing the mounting state of the vibration isolating bush 従来の防振ブッシュの軸直角方向断面図Cross-sectional view perpendicular to the axis of a conventional anti-vibration bush

符号の説明Explanation of symbols

１ 内筒
２ 外筒
３ 防振基体
４ 主液室
５ 副液室
６ オリフィス
８ 凹部
１４ 連結ロッド
１５ 筒体
１６ 車体側ブラケット
１７ 係合凸部 DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 3 Anti-vibration base | substrate 4 Main liquid chamber 5 Sub liquid chamber 6 Orifice 8 Concave part 14 Connection rod 15 Cylindrical body 16 Body side bracket 17 Engagement convex part

Claims (5)

車両側ブラケット等に取り付けられる内筒と、該内筒の外方に配置された外筒と、内外筒間に介設されたゴム状弾性体製の防振基体とを備え、前記内筒の軸方向と直交する二方向のばね定数及び減衰性能のうち少なくともいずれかが異なるように設定された防振ブッシュにおいて、防振ブッシュの軸方向端面に、軸周りに位置決めするための位置決め手段が設けられたことを特徴とする防振ブッシュ。 An inner cylinder attached to a vehicle-side bracket or the like, an outer cylinder disposed outside the inner cylinder, and a rubber-like elastic vibration-proof base interposed between the inner and outer cylinders. In the vibration isolating bush set so that at least one of the spring constant and the damping performance in two directions orthogonal to the axial direction is different, positioning means for positioning around the axis is provided on the axial end face of the vibration isolating bush. Anti-vibration bush characterized by 前記位置決め手段は、防振基体の軸方向端面に形成されたことを特徴とする請求項１記載の防振ブッシュ。 The anti-vibration bush according to claim 1, wherein the positioning means is formed on an axial end surface of the anti-vibration base. 前記位置決め手段は、防振基体の軸方向端面において内筒の周囲に形成された凹部であることを特徴とする請求項２記載の防振ブッシュ。 3. The vibration isolating bush according to claim 2, wherein the positioning means is a recess formed around the inner cylinder on the axial end surface of the vibration isolating base. 前記凹部は、車両側ブラケット等に形成された係合凸部に係合位置決めされるものであることを特徴とする請求項３記載の防振ブッシュ。 4. The anti-vibration bush according to claim 3, wherein the concave portion is engaged and positioned with an engaging convex portion formed on a vehicle side bracket or the like. 前記防振基体の外周部に、内筒を挟んで一対の空間部が形成され、該空間部が外筒により被覆されることにより、液を封入する主液室と副液室とが形成され、該主液室と副液室とを連通するオリフィスが前記防振基体の外周側に形成されたことを特徴とする請求項１〜４のいずれかに記載の液封入式の防振ブッシュ。 A pair of space portions are formed on the outer peripheral portion of the vibration isolating base with an inner cylinder interposed therebetween, and the space portion is covered with the outer cylinder, thereby forming a main liquid chamber and a sub liquid chamber for enclosing the liquid. The liquid-filled vibration-proof bushing according to any one of claims 1 to 4, wherein an orifice for communicating the main liquid chamber and the sub-liquid chamber is formed on an outer peripheral side of the vibration-proof base.
JP2006288182A 2006-10-24 2006-10-24 Vibration-proofing bush Withdrawn JP2007093010A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912990A (en) * 2014-03-12 2015-09-16 广州汽车集团股份有限公司 Hydraulic torsion resisting pull rod and vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104912990A (en) * 2014-03-12 2015-09-16 广州汽车集团股份有限公司 Hydraulic torsion resisting pull rod and vehicle

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