JP2008025755A - Liquid sealed bushing - Google Patents

Liquid sealed bushing Download PDF

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JP2008025755A
JP2008025755A JP2006200411A JP2006200411A JP2008025755A JP 2008025755 A JP2008025755 A JP 2008025755A JP 2006200411 A JP2006200411 A JP 2006200411A JP 2006200411 A JP2006200411 A JP 2006200411A JP 2008025755 A JP2008025755 A JP 2008025755A
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liquid chamber
liquid
sub
orifice
core member
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JP4948068B2 (en
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Yukihiro Orimoto
幸弘 織本
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid sealed bushing which realizes an improvement of stiffness or damping performance in the axial direction while employing a relatively compact and simple configuration. <P>SOLUTION: An elastic body 18 has a left forward liquid chamber 21 and a right forward liquid chamber 22 formed in its forward portion, and on the other hand, a left rear liquid chamber 23 and a right rear liquid chamber 24 formed in its rear portion. A stopper 17 has a first sub-orifice 33 communicating the left forward liquid chamber 21 and the right forward liquid chamber 22 and a second sub-orifice 34 communicating the left rear liquid chamber 23 and the right rear liquid chamber 24. When a trailing arm 2 moves in the right direction, working liquid 29 of the left forward liquid chamber 21 and the left rear liquid chamber 23 flows into the right forward liquid chamber 22 or the right rear liquid chamber 24 through the sub-orifices 33 and 34. Rapid right/left movement of the trailing arm 2 is hardly caused by a flow resistance when the working liquid 29 flows through the sub-orifices 33 and 34, and right/left vibration of the trailing arm 2 is also damped promptly. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、車両用サスペンションの連結部位等に介装される液体封入ブッシュに係り、詳しくは、比較的小型かつ簡便な構成を採りながら、軸方向での剛性や減衰性の向上を実現を実現する技術に関する。   The present invention relates to a liquid-filled bush interposed in a connection part of a vehicle suspension, and more specifically, it achieves improvement in axial rigidity and damping while adopting a relatively small and simple configuration. Related to technology.

自動車用サスペンションには、フレームやサスペンションメンバ等の車体側構造部材（以下、フレームに代表させる）とナックルやアクスルビーム等の車輪側部材とを連結させるため、各種のアームやロッド（以下、アームに代表させる）が用いられている。通常、フレームとアームとの連結部には、路面からの振動等の車体側構造部材への伝達を抑制すべく、芯部材と外筒との間に弾性体（一般には、ゴム）を加硫接着等によって固着・一体化させてなるブッシュが取り付けられている。ブッシュは操縦安定性の観点からはばね定数を高くすることが望ましいが、乗り心地や音振性能（ＮＶＨ低減）の観点からは減衰性も高くする必要がある。そこで、一部の自動車用サスペンションでは、動的ばね定数の最適化と減衰性の向上とを両立させるべく、オリフィスで連通された２つの液室を弾性体の内部に形成し、両液室にシリコーンオイル等の作動液を封入した液体封入ブッシュが採用されている（特許文献１，２参照）。   In automobile suspensions, various types of arms and rods (hereinafter referred to as arms) are connected to vehicle-side structural members (hereinafter referred to as frames) such as frames and suspension members and wheel side members such as knuckles and axle beams. Is used). Normally, an elastic body (generally rubber) is vulcanized between the core member and the outer cylinder at the joint between the frame and the arm in order to suppress transmission of vibration from the road surface to the vehicle body side structural member. A bush that is fixed and integrated by bonding or the like is attached. Although it is desirable for the bush to have a high spring constant from the viewpoint of steering stability, it is also necessary to increase the damping from the viewpoint of riding comfort and sound vibration performance (NVH reduction). Therefore, in some automobile suspensions, in order to achieve both optimization of the dynamic spring constant and improvement of damping performance, two liquid chambers communicated by an orifice are formed inside the elastic body, and both liquid chambers are formed. A liquid-filled bush in which hydraulic fluid such as silicone oil is sealed is employed (see Patent Documents 1 and 2).

液体封入ブッシュでは、芯部材と外筒との間に所定方向の力が作用しても、作動液がオリフィスを介して流動する際の抵抗によって芯部材と外筒との瞬間的な変位が抑制され、サスペンションジオメトリーの急激な変化が生じ難くなる。また、芯部材が外筒に対して所定の方向に相対振動すると両液室の容積が交番的に拡縮するため、一方の液室と他方の液室との間でオリフィスを介した作動液の移動が生じ、その際の流動抵抗によって相対振動が減衰される。例えば、特許文献１の液体封入ブッシュでは、サスペンションアームへの装着時において両液室が芯部材を挟むかたちで径方向前後に形成されており、自動車の加減速時におけるサスペンション剛性を向上させるとともに、前後方向の振動も効果的に減衰する。なお、液体封入ブッシュでは、芯部材と外筒との径方向相対変位を規制すべく、ストッパが液室内に設置されている。
特開平１０−２３７２号公報 特開２００２−２６６９２９号公報 In the liquid-filled bush, even if a force in a predetermined direction acts between the core member and the outer cylinder, the momentary displacement between the core member and the outer cylinder is suppressed by the resistance when the hydraulic fluid flows through the orifice. As a result, sudden changes in suspension geometry are less likely to occur. In addition, when the core member relatively vibrates in a predetermined direction with respect to the outer cylinder, the volume of both liquid chambers alternately expands and contracts, so that the working fluid passes through the orifice between one liquid chamber and the other liquid chamber. Movement occurs, and the relative vibration is attenuated by the flow resistance at that time. For example, in the liquid-filled bush of Patent Document 1, both liquid chambers are formed in the front-rear direction in the form of sandwiching the core member when mounted on the suspension arm, improving the suspension rigidity during acceleration / deceleration of the automobile, The vibration in the front-rear direction is also damped effectively. In the liquid-filled bush, a stopper is installed in the liquid chamber in order to restrict the radial relative displacement between the core member and the outer cylinder.
Japanese Patent Laid-Open No. 10-2372 JP 2002-266929 A

上述した従来の液体封入ブッシュには、弾性体内に液室を設けることに起因する次のような問題があった。液体封入ブッシュでは、弾性体内に液室（すなわち、空間）が設けられているため、通常のブッシュに較べて軸方向の剛性や減衰性が低くなることが避けられない。したがって、自動車の旋回走行時に横力が作用すると、サスペンションアームが比較的容易に左右に移動する他、左右方向の振動も減衰され難くなり、操縦性や安定性が損なわれるのである。そこで、特許文献２の液体封入ブッシュでは、芯部材から延設された固定プレートと外筒から延設された傾斜板との間に弾性体を介装し、軸方向における剛性や減衰性の向上を図っている。しかしながら、このような液体封入ブッシュは、その体格が大きくなるために設置自由度が減少する他、構成部材点数が増大して製造コストが高くなること等が避けられなかった。また、液室内に突出するストッパの形状を工夫し、作動液の慣性マス効果によって軸方向の剛性を一時的に高めることも試みたが、体格を徒に小さくするとストッパとしての機能が発揮できなくなる虞があった。   The conventional liquid-filled bush described above has the following problems resulting from providing a liquid chamber in the elastic body. In the liquid-filled bush, since a liquid chamber (that is, a space) is provided in the elastic body, it is inevitable that the axial rigidity and attenuation are reduced as compared with a normal bush. Therefore, when a lateral force is applied during turning of the automobile, the suspension arm moves relatively easily to the left and right, and vibrations in the left and right directions are hardly attenuated, resulting in a loss of maneuverability and stability. Therefore, in the liquid-filled bush of Patent Document 2, an elastic body is interposed between the fixed plate extended from the core member and the inclined plate extended from the outer cylinder, thereby improving the rigidity and damping in the axial direction. I am trying. However, such a liquid-filled bush has an unavoidable increase in manufacturing cost due to an increase in the number of constituent members as well as a reduction in the degree of freedom of installation due to an increase in the size of the body. In addition, the shape of the stopper that protrudes into the liquid chamber has been devised, and an attempt has been made to temporarily increase the axial rigidity by the inertial mass effect of the hydraulic fluid. There was a fear.

本発明は、このような背景に鑑みなされたもので、比較的小型かつ簡便な構成を採りながら、軸方向での剛性や減衰性の向上を実現した液体封入ブッシュを提供することを目的とする。   The present invention has been made in view of such a background, and an object of the present invention is to provide a liquid-filled bush that realizes improvement in rigidity and damping in the axial direction while adopting a relatively small and simple configuration. .

請求項１の発明は、外筒と、この外筒の内側に配設された芯部材と、前記外筒と前記芯部材との間に介装された弾性体と、前記弾性体における前記芯部材を挟んだ径方向一側に形成された一側液室と、前記弾性体における前記芯部材を挟んだ径方向他側に形成された他側液室と、前記一側液室と前記他側液室とを連通するメインオリフィスとを備え、前記一側液室と前記他側液室とに作動液を封入してなる液体封入ブッシュであって、前記芯部材から前記一側液室と前記他側液室との少なくとも一方の軸方向中間部に向けてストッパが突設されるとともに、当該ストッパに前記作動液を軸方向に流通させるサブオリフィスが穿設されたことを特徴とする。   The invention according to claim 1 is an outer cylinder, a core member disposed inside the outer cylinder, an elastic body interposed between the outer cylinder and the core member, and the core in the elastic body One side liquid chamber formed on one side in the radial direction across the member, the other side liquid chamber formed on the other side in the radial direction across the core member in the elastic body, the one side liquid chamber, and the other A liquid-filled bush comprising a main orifice that communicates with a side liquid chamber, and in which a working liquid is sealed in the one-side liquid chamber and the other-side liquid chamber, from the core member to the one-side liquid chamber; A stopper is projected toward at least one axially intermediate portion with respect to the other side liquid chamber, and a sub-orifice through which the working fluid flows in the axial direction is formed in the stopper.

また、請求項２の発明は、請求項１の発明に係る液体封入ブッシュにおいて、前記一側液室と前記他側液室との少なくとも一方を軸方向で区画する弾性隔壁を備えたことを特徴とする。   According to a second aspect of the present invention, in the liquid-filled bush according to the first aspect of the present invention, an elastic partition that partitions at least one of the one-side liquid chamber and the other-side liquid chamber in the axial direction is provided. And

請求項１の液体封入ブッシュによれば、芯部材と外筒とが軸方向に相対移動すると、ストッパで仕切られた液室の一方の側から他方の側にサブオリフィスを介して作動液が流動するため、サブオリフィスの径等を変えることで軸方向の剛性や減衰性を比較的自由に設定できる。また、請求項２の液体封入ブッシュによれば、作動液がサブオリフィス以外の部位（すなわち、ストッパと弾性体との間）を通過しなくなるため、軸方向の剛性や減衰性をより高めることができる。   According to the liquid-filled bush of claim 1, when the core member and the outer cylinder move relative to each other in the axial direction, the working fluid flows from one side of the liquid chamber partitioned by the stopper to the other side through the sub-orifice. Therefore, the axial rigidity and damping can be set relatively freely by changing the diameter of the sub-orifice. According to the liquid-filled bush of claim 2, since the hydraulic fluid does not pass through a portion other than the sub-orifice (that is, between the stopper and the elastic body), axial rigidity and damping can be further improved. it can.

以下、図面を参照して、本発明を適用した液体封入ブッシュの実施形態を詳細に説明する。   Hereinafter, an embodiment of a liquid filled bush to which the present invention is applied will be described in detail with reference to the drawings.

［第１実施形態］
図１は第１実施形態に係る自動車用のリヤサスペンションを示す斜視図であり、図２は図１中のII部を車体に連結した状態を示す後方からの斜視図である。また、図３は第１実施形態に係る液体封入ブッシュの斜視図であり、図４は軸心を通る垂直面で図３の液体封入ブッシュを切断した横断面図であり、図５は軸心を通る水平面で図３の液体封入ブッシュを切断した縦断面図であり、図６は図４中のＶＩ−ＶＩ断面図であり、図７は図４中のＶII−ＶII断面図である。なお、液体封入ブッシュの説明にあたっては、車両前方側を前とし、車両上方側を上とする。 [First Embodiment]
FIG. 1 is a perspective view showing a rear suspension for an automobile according to the first embodiment, and FIG. 2 is a perspective view from the rear showing a state in which a portion II in FIG. 1 is connected to a vehicle body. 3 is a perspective view of the liquid-filled bush according to the first embodiment, FIG. 4 is a cross-sectional view of the liquid-filled bush of FIG. 3 taken along a vertical plane passing through the shaft center, and FIG. 3 is a longitudinal sectional view of the liquid filled bushing of FIG. 3 cut along a horizontal plane passing through FIG. 3, FIG. 6 is a sectional view taken along line VI-VI in FIG. 4, and FIG. 7 is a sectional view taken along line VII-VII in FIG. In the description of the liquid-filled bush, the front side of the vehicle is the front and the upper side of the vehicle is the top.

≪第１実施形態の構成≫
図１に示すように、本実施形態のリヤサスペンション１は、いわゆるＨ型トーションビーム式サスペンションであり、左右のトレーリングアーム２，３や、両トレーリングアーム２，３の中間部を連結するトーションビーム４、懸架ばねである左右一対のコイルスプリング５、左右一対の油圧ダンパ６等から構成され、左右のリヤホイール７，８の懸架を行っている。図２に示すように、トレーリングアーム２の前端には保持筒部９が形成されており、この保持筒部９に液体封入式のコンプライアンスブッシュ（以下、液体封入ブッシュと記す）１１が内嵌されている。液体封入ブッシュ１１（すなわち、トレーリングアーム２の前端）は、フロアフレーム１２の下面に取り付けられたコ字断面形状のブラケット１３にボルト１４を介して連結されている。 << Configuration of First Embodiment >>
As shown in FIG. 1, the rear suspension 1 of the present embodiment is a so-called H-type torsion beam suspension, and the torsion beam 4 that connects the left and right trailing arms 2 and 3 and the intermediate portion between the trailing arms 2 and 3. The left and right rear wheels 7 and 8 are suspended by a pair of left and right coil springs 5, which are suspension springs, a pair of left and right hydraulic dampers 6 and the like. As shown in FIG. 2, a holding cylinder portion 9 is formed at the front end of the trailing arm 2, and a liquid-filled compliance bush (hereinafter referred to as a liquid-filled bush) 11 is fitted in the holding tube portion 9. Has been. The liquid-filled bush 11 (that is, the front end of the trailing arm 2) is connected to a bracket 13 having a U-shaped cross section attached to the lower surface of the floor frame 12 via a bolt 14.

＜液体封入ブッシュ＞
図３〜図７に示すように、液体封入ブッシュ１１は、ブラケット１３の内側面に両端が当接する鋼管製の内筒（芯部材）１５と、トレーリングアーム２の保持筒部９に圧入される鋼管製の外筒１６と、内筒１５と外筒１６との間に介装された弾性体１８とを主要構成要素としている。 <Liquid filled bush>
As shown in FIGS. 3 to 7, the liquid-filled bush 11 is press-fitted into a steel tube inner cylinder (core member) 15 whose both ends abut against the inner surface of the bracket 13 and the holding cylinder portion 9 of the trailing arm 2. The main components are an outer cylinder 16 made of steel pipe and an elastic body 18 interposed between the inner cylinder 15 and the outer cylinder 16.

第１実施形態の液体封入ブッシュ１１では、内筒１５の軸方向中央部に略長円形断面のストッパ１７が圧入によって外嵌・一体化されている。また、外筒１６には、弾性体１８がその内周面に固着（加硫接着）された略円筒状のアウタカラー１９が内嵌している。なお、アウタカラー１９は、外筒１６の両端部が加締められることにより、外筒１６に固着・一体化されている。また、弾性体１８は、アウタカラー１９の内周面に固着されるとともに、内筒１５の外周面およびストッパ１７の外周面や側面にも固着（加硫接着）されている。   In the liquid-filled bush 11 of the first embodiment, a stopper 17 having a substantially oval cross section is externally fitted and integrated at the axially central portion of the inner cylinder 15 by press-fitting. The outer cylinder 16 is fitted with a substantially cylindrical outer collar 19 in which an elastic body 18 is fixed (vulcanized and bonded) to the inner peripheral surface thereof. The outer collar 19 is fixed and integrated with the outer cylinder 16 by crimping both ends of the outer cylinder 16. The elastic body 18 is fixed to the inner peripheral surface of the outer collar 19, and is also fixed (vulcanized and bonded) to the outer peripheral surface of the inner cylinder 15 and the outer peripheral surface and side surfaces of the stopper 17.

図５，図６に示すように、弾性体１８には、その前部に左前液室２１と右前液室２２とが形成される一方、後部に左後液室２３と右後液室２４とが形成されている。各液室２１〜２４は、側面視でそれぞれ円弧状を呈しており、前後方向中央部に形成された左右一対の弾性隔壁２５，２６と、左右方向中央部に形成された前後一対の弾性隔壁２７，２８とによって弾性体１８内に区画されている。なお、各液室２１〜２４には、シリコーンオイル等の作動液２９が封入されている。   As shown in FIGS. 5 and 6, the elastic body 18 has a left front liquid chamber 21 and a right front liquid chamber 22 formed at the front thereof, while a left rear liquid chamber 23 and a right rear liquid chamber 24 formed at the rear thereof. Is formed. Each of the liquid chambers 21 to 24 has an arc shape in a side view, and a pair of left and right elastic partition walls 25 and 26 formed in the center portion in the front-rear direction, and a pair of front and rear elastic partitions formed in the center portion in the left-right direction. The elastic body 18 is partitioned by 27 and 28. Note that a hydraulic fluid 29 such as silicone oil is sealed in each of the liquid chambers 21 to 24.

アウタカラー１９には、左前液室２１と左後液室２３とを連通する上下一対の第１メインオリフィス３１と、右前液室２２と右後液室２４とを連通するこれも上下一対の第２メインオリフィス３２とが形成されている。また、ストッパ１７（および、弾性体１８のストッパ１７の外周を覆う部位）には、左前液室２１と右前液室２２とを連通する第１サブオリフィス３３と、左後液室２３と右後液室２４とを連通する第２サブオリフィス３４とが穿設されている。   The outer collar 19 has a pair of upper and lower first main orifices 31 communicating the left front liquid chamber 21 and the left rear liquid chamber 23, and a right front liquid chamber 22 and a right rear liquid chamber 24. 2 main orifices 32 are formed. Further, the stopper 17 (and the portion covering the outer periphery of the stopper 17 of the elastic body 18) has a first sub-orifice 33 that communicates the left front liquid chamber 21 and the right front liquid chamber 22, the left rear liquid chamber 23, and the right rear. A second sub-orifice 34 communicating with the liquid chamber 24 is formed.

≪第１実施形態の作用≫
自動車が直進走行中に加減速を行ったり、大きな段差を乗り越えたりすると、リヤサスペンション１にはリヤホイール７，８から前後方向の力が作用し、トレーリングアーム２が前後に移動する。そして、図８に示すように、トレーリングアーム２が後方に移動すると、内筒１５に対する外筒１６の後退に伴い、左右前液室２１，２２の容積が縮小し、左右後液室２３，２４の容積が拡大することになる。 << Operation of First Embodiment >>
When the vehicle accelerates or decelerates while traveling straight ahead or climbs over a large level difference, force in the front-rear direction acts on the rear suspension 1 from the rear wheels 7 and 8, and the trailing arm 2 moves back and forth. As shown in FIG. 8, when the trailing arm 2 moves rearward, the volume of the left and right front liquid chambers 21 and 22 decreases with the retraction of the outer cylinder 16 with respect to the inner cylinder 15, and the left and right rear liquid chambers 23, The volume of 24 will be expanded.

第１実施形態では、左前液室２１と左後液室２３とが第１メインオリフィス３１によって連通され、右前液室２２と右後液室２４とが第２メインオリフィス３２によって連通されているため、左右前液室２１，２２の作動液２９は、これらメインオリフィス３１，３２を介して左右後液室２３，２４に流入することになる。その結果、作動液２９がメインオリフィス３１，３２を通過する際の流動抵抗によってトレーリングアーム２の急激な前後動が起こり難くなるとともに、トレーリングアーム２の前後振動も速やかに減衰される。   In the first embodiment, the left front liquid chamber 21 and the left rear liquid chamber 23 are communicated by the first main orifice 31, and the right front liquid chamber 22 and the right rear liquid chamber 24 are communicated by the second main orifice 32. The hydraulic fluid 29 in the left and right front liquid chambers 21 and 22 flows into the left and right rear liquid chambers 23 and 24 through these main orifices 31 and 32. As a result, the forward and backward movement of the trailing arm 2 is less likely to occur due to the flow resistance when the hydraulic fluid 29 passes through the main orifices 31 and 32, and the longitudinal vibration of the trailing arm 2 is also quickly damped.

一方、自動車が旋回走行を行うと、リヤサスペンション１にはリヤホイール７，８から左右方向の力が作用し、トレーリングアーム２が左右方向に移動する。そして、図９に示すように、トレーリングアーム２が右方向に移動すると、左前液室２１および左後液室２３の容積が縮小し、右前液室２２および右後液室２４の容積が拡大することになる。   On the other hand, when the automobile turns, the left and right forces are applied to the rear suspension 1 from the rear wheels 7 and 8, and the trailing arm 2 moves in the left and right direction. As shown in FIG. 9, when the trailing arm 2 moves to the right, the volumes of the left front liquid chamber 21 and the left rear liquid chamber 23 are reduced, and the volumes of the right front liquid chamber 22 and the right rear liquid chamber 24 are increased. Will do.

第１実施形態では、左前液室２１と右前液室２２とが第１サブオリフィス３３によって連通され、左後液室２３と右後液室２４とが第２サブオリフィス３４によって連通されているため、左前液室２１および左後液室２３の作動液２９は、これらサブオリフィス３３，３４を介して右前液室２２または右後液室２４に流入することになる。その結果、作動液２９がサブオリフィス３３，３４を通過する際の流動抵抗によってトレーリングアーム２の急激な左右動が起こり難くなるとともに、トレーリングアーム２の左右振動も速やかに減衰される。なお、図１０はサブオリフィスの径と動ばね定数との関係を示すグラフであり、小径（図中にＡで示す）から中径（図中にＢで示す）、大径（図中にＣで示す）と、径が大きくなるに従って、動ばね定数が高周波域まで高くなることが判る。   In the first embodiment, the left front liquid chamber 21 and the right front liquid chamber 22 are communicated by the first sub-orifice 33, and the left rear liquid chamber 23 and the right rear liquid chamber 24 are communicated by the second sub-orifice 34. The hydraulic fluid 29 in the left front liquid chamber 21 and the left rear liquid chamber 23 flows into the right front liquid chamber 22 or the right rear liquid chamber 24 through the sub-orifices 33 and 34. As a result, the rapid left / right movement of the trailing arm 2 is less likely to occur due to the flow resistance when the hydraulic fluid 29 passes through the sub-orifices 33 and 34, and the left / right vibration of the trailing arm 2 is also quickly damped. FIG. 10 is a graph showing the relationship between the diameter of the sub-orifice and the dynamic spring constant, from small diameter (indicated by A in the figure) to medium diameter (indicated by B in the figure), large diameter (indicated by C in the figure). It can be seen that the dynamic spring constant increases to the high frequency region as the diameter increases.

［第２実施形態］
図１１は第２実施形態に係る液体封入ブッシュの軸心を通る水平面で切断した縦断面図であり、図１２は図１１中のＸII−ＸII断面図である。なお、図１１は第１実施形態における図５に対応し、図１２は同じく図６に対応する。 [Second Embodiment]
11 is a longitudinal sectional view cut along a horizontal plane passing through the axis of the liquid-filled bush according to the second embodiment, and FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11 corresponds to FIG. 5 in the first embodiment, and FIG. 12 also corresponds to FIG.

≪第２実施形態の構成≫
図１１，図１２に示すように、第２実施形態の液体封入ブッシュ１１は、上述した第１実施形態のものと略同様の構造を有しているが、以下のいくつかの点で異なっている。すなわち、第２実施形態の液体封入ブッシュ１１では、左前液室２１と右前液室２２とを区画する隔壁や左後液室２３と右後液室２４とを区画する隔壁が無く、左前液室２１と右前液室２２との間および左後液室２３と右後液室２４との間が比較的断面積の小さい連通路で連通され、更に、第１，第２サブオリフィス３３，３４が有意に拡大されている。 << Configuration of Second Embodiment >>
As shown in FIGS. 11 and 12, the liquid-filled bush 11 of the second embodiment has a structure that is substantially the same as that of the first embodiment described above, but differs in the following points. Yes. That is, in the liquid filled bushing 11 of the second embodiment, there is no partition partitioning the left front liquid chamber 21 and the right front liquid chamber 22 and no partition partitioning the left rear liquid chamber 23 and the right rear liquid chamber 24, and the left front liquid chamber. 21 and the right front liquid chamber 22 and between the left rear liquid chamber 23 and the right rear liquid chamber 24 are communicated by a communication path having a relatively small cross-sectional area. Further, the first and second sub-orifices 33 and 34 are connected to each other. Significantly expanded.

≪第２実施形態の作用≫
第２実施形態の液体封入ブッシュ１１では、図１３に示すように、トレーリングアーム２が左右方向に移動した場合、左前液室２１と右前液室２２とを区画する隔壁や左後液室２３と右後液室２４とを区画する隔壁が無く、両サブオリフィス３３，３４が拡大されていることにより、弾性体１８と作動液２９の慣性マスとによって一種の共振系が形成され、高周波振動の効果的な減衰が行われる。 << Operation of Second Embodiment >>
In the liquid-filled bush 11 of the second embodiment, as shown in FIG. 13, when the trailing arm 2 moves in the left-right direction, a partition that partitions the left front liquid chamber 21 and the right front liquid chamber 22 or the left rear liquid chamber 23. And the right rear liquid chamber 24 are not partitioned, and both the sub-orifices 33 and 34 are enlarged, so that a kind of resonance system is formed by the elastic body 18 and the inertia mass of the hydraulic fluid 29, and high-frequency vibration is generated. Effective attenuation of the is performed.

このように、上記両実施形態の液体封入ブッシュ１１では、比較的小型かつ簡便な構成を採りながら、前後方向のみならず、左右方向においてもリヤサスペンション１の剛性や減衰性を向上させることができ、操縦性安定性や乗り心地の悪化等を効果的に抑制することができた。   As described above, in the liquid filled bushing 11 of both the above embodiments, the rigidity and damping of the rear suspension 1 can be improved not only in the front-rear direction but also in the left-right direction while adopting a relatively small and simple configuration. In addition, it was possible to effectively suppress maneuverability stability and deterioration of ride comfort.

以上で具体的実施形態の説明を終えるが、本発明は上記実施形態に限定されることなく幅広く変形実施することができる。例えば、上記実施形態は、Ｈ型トーションビーム式サスペンションに用いられるコンプライアンス液体封入ブッシュに本発明を適用したものであるが、他の形式のリヤサスペンションやフロントサスペンション等に用いられる液体封入ブッシュに本発明を適用してもよい。また、芯部材として、鋼管製の内筒を採用したが、両端にボルト孔等を有する軸状部材を採用してもよい。また、上記実施形態では前部の液室と後部の液室とを弾性隔壁によって左右に区画するようにしたが、ストッパの大きさ等を適宜設定すること等により、この弾性隔壁を省略するようにしてもよい。また、サブオリフィスは、ストッパの一方の液室に臨む側のみに設けるようにしてもよいし、その形状や個数等も適宜設定可能である。その他、液体封入ブッシュ各部の具体的形状やサスペンションアームへの装着形態等についても、本発明の趣旨を逸脱しない範囲で適宜変更可能である。   Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the above embodiment, the present invention is applied to a compliance liquid sealed bush used for an H-type torsion beam suspension, but the present invention is applied to a liquid sealed bush used for other types of rear suspension, front suspension, and the like. You may apply. Moreover, although the steel pipe inner cylinder was employ | adopted as a core member, you may employ | adopt the shaft-shaped member which has a bolt hole etc. in both ends. Further, in the above embodiment, the front liquid chamber and the rear liquid chamber are divided to the left and right by the elastic partition, but the elastic partition is omitted by appropriately setting the size of the stopper and the like. It may be. Further, the sub-orifice may be provided only on the side of the stopper facing one liquid chamber, and the shape, number, etc. thereof can be set as appropriate. In addition, the specific shape of each part of the liquid-filled bush, the mounting form to the suspension arm, and the like can be changed as appropriate without departing from the spirit of the present invention.

第１実施形態に係る自動車用のリヤサスペンションを示す斜視図である。1 is a perspective view showing a rear suspension for an automobile according to a first embodiment. 図１中のII部を車体に連結した状態を示す後方からの斜視図である。It is a perspective view from the back which shows the state which connected the II section in FIG. 1 to the vehicle body. 第１実施形態に係る液体封入ブッシュの斜視図である。It is a perspective view of the liquid enclosure bush concerning a 1st embodiment. 軸心を通る垂直面で図３の液体封入ブッシュを切断した横断面図である。FIG. 4 is a cross-sectional view of the liquid-filled bush of FIG. 3 cut along a vertical plane passing through the axis. 軸心を通る水平面で図３の液体封入ブッシュを切断した縦断面図である。It is the longitudinal cross-sectional view which cut | disconnected the liquid enclosure bush of FIG. 3 by the horizontal surface which passes along an axial center. 図４中のＶＩ−ＶＩ断面図である。It is VI-VI sectional drawing in FIG. 図４中のＶII−ＶII断面図である。It is VII-VII sectional drawing in FIG. 第１実施形態に係る液体封入ブッシュの作動状態を示す断面図である。It is sectional drawing which shows the operation state of the liquid enclosure bush which concerns on 1st Embodiment. 第１実施形態に係る液体封入ブッシュの作動状態を示す断面図である。It is sectional drawing which shows the operation state of the liquid enclosure bush which concerns on 1st Embodiment. 第１実施形態に係るサブオリフィスの径と動ばね定数との関係を示すグラフである。It is a graph which shows the relationship between the diameter of the suborifice which concerns on 1st Embodiment, and a dynamic spring constant. 第２実施形態に係る液体封入ブッシュの軸心を通る水平面で切断した縦断面図である。It is the longitudinal cross-sectional view cut | disconnected by the horizontal surface which passes along the axial center of the liquid enclosure bush which concerns on 2nd Embodiment. 図１１中のＸII−ＸII断面図である。It is XII-XII sectional drawing in FIG. 第２実施形態に係る液体封入ブッシュの作動状態を示す断面図である。It is sectional drawing which shows the operation state of the liquid enclosure bush which concerns on 2nd Embodiment.

符号の説明Explanation of symbols

１１ 液体封入ブッシュ
１５ 内筒
１６ 外筒
１７ ストッパ
１８ 弾性体
２１ 左前液室
２２ 右前液室
２３ 左後液室
２４ 右後液室
２５〜２８ 弾性隔壁
２９ 作動液
３１ 第１メインオリフィス
３２ 第２メインオリフィス
３３ 第１サブオリフィス
３４ 第２サブオリフィス
DESCRIPTION OF SYMBOLS 11 Liquid enclosure bush 15 Inner cylinder 16 Outer cylinder 17 Stopper 18 Elastic body 21 Left front liquid chamber 22 Right front liquid chamber 23 Left rear liquid chamber 24 Right rear liquid chamber 25-28 Elastic partition wall 29 Hydraulic fluid 31 1st main orifice 32 2nd main Orifice 33 First sub-orifice 34 Second sub-orifice

Claims (2)

外筒と、この外筒の内側に配設された芯部材と、前記外筒と前記芯部材との間に介装された弾性体と、前記弾性体における前記芯部材を挟んだ径方向一側に形成された一側液室と、前記弾性体における前記芯部材を挟んだ径方向他側に形成された他側液室と、前記一側液室と前記他側液室とを連通するメインオリフィスとを備え、前記一側液室と前記他側液室とに作動液を封入してなる液体封入ブッシュであって、
前記芯部材から前記一側液室と前記他側液室との少なくとも一方の軸方向中間部に向けてストッパが突設されるとともに、当該ストッパに前記作動液を軸方向に流通させるサブオリフィスが穿設されたことを特徴とする液体封入ブッシュ。 An outer cylinder, a core member disposed inside the outer cylinder, an elastic body interposed between the outer cylinder and the core member, and a radial direction sandwiching the core member in the elastic body The one side liquid chamber formed on the side, the other side liquid chamber formed on the other radial side of the elastic member with the core member interposed therebetween, and the one side liquid chamber and the other side liquid chamber communicating with each other. A liquid-filled bush comprising a main orifice, and a working liquid sealed in the one-side liquid chamber and the other-side liquid chamber,
A stopper projects from the core member toward at least one axial intermediate portion of the one-side liquid chamber and the other-side liquid chamber, and a sub-orifice for allowing the working fluid to flow in the axial direction through the stopper. A liquid-filled bush characterized by being drilled. 前記一側液室と前記他側液室との少なくとも一方を軸方向で区画する弾性隔壁を備えたことを特徴とする、請求項１に記載の液体封入ブッシュ。
2. The liquid-filled bush according to claim 1, further comprising an elastic partition wall that partitions at least one of the one-side liquid chamber and the other-side liquid chamber in an axial direction.
JP2006200411A 2006-07-24 2006-07-24 Liquid-filled bush Expired - Fee Related JP4948068B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014318A1 (en) * 2012-07-19 2014-01-23 Anvis Deutschland Gmbh Spring function component for a hydroelastic bearing and hydroelastic bearing
CN104912995A (en) * 2014-03-14 2015-09-16 广州汽车集团股份有限公司 Hydraulic bushing in vehicle suspension system guide device and vehicle
CN111577815A (en) * 2019-02-15 2020-08-25 本田技研工业株式会社 Variable stiffness bushing

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JPS60139942A (en) * 1983-12-27 1985-07-24 Nissan Motor Co Ltd Tubular bush
JPS62194047A (en) * 1986-02-20 1987-08-26 Bridgestone Corp Vibro-isolating device
JPH07269641A (en) * 1994-03-29 1995-10-20 Kurashiki Kako Co Ltd Liquid-seal bush

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS60139942A (en) * 1983-12-27 1985-07-24 Nissan Motor Co Ltd Tubular bush
JPS62194047A (en) * 1986-02-20 1987-08-26 Bridgestone Corp Vibro-isolating device
JPH07269641A (en) * 1994-03-29 1995-10-20 Kurashiki Kako Co Ltd Liquid-seal bush

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012014318A1 (en) * 2012-07-19 2014-01-23 Anvis Deutschland Gmbh Spring function component for a hydroelastic bearing and hydroelastic bearing
DE102012014318B4 (en) * 2012-07-19 2016-10-20 Anvis Deutschland Gmbh Spring function component for a hydroelastic bearing and hydroelastic bearing
US10054188B2 (en) 2012-07-19 2018-08-21 Anvis Deutschland Gmbh Spring functional component for a hydroelastic bearing and a hydroelastic bearing
CN104912995A (en) * 2014-03-14 2015-09-16 广州汽车集团股份有限公司 Hydraulic bushing in vehicle suspension system guide device and vehicle
CN104912995B (en) * 2014-03-14 2017-04-19 广州汽车集团股份有限公司 Hydraulic bushing in vehicle suspension system guide device and vehicle
CN111577815A (en) * 2019-02-15 2020-08-25 本田技研工业株式会社 Variable stiffness bushing
US11371579B2 (en) 2019-02-15 2022-06-28 Honda Motor Co., Ltd. Variable stiffness bushing

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