JP2007127172A

JP2007127172A - Strut mount

Info

Publication number: JP2007127172A
Application number: JP2005319310A
Authority: JP
Inventors: Teruyuki Ito; 輝幸伊藤
Original assignee: Nok Corp
Current assignee: Nok Corp
Priority date: 2005-11-02
Filing date: 2005-11-02
Publication date: 2007-05-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strut mount which improves together a riding comfortableness in an axial direction and steering stability in a perpendicular direction. <P>SOLUTION: In the strut mount 1 having: an outer member 2 assembled with a car body; an inner member 3 assembled with a shock absorber which is concentrically arranged with the outer member 2; and a rubbery elastomer 4 joined with both members 2 and 3, a first resin material 5 joined with an inner peripheral side of the outer member 2 and a second resin material 6 joined with an outer peripheral side of the inner member 3 are slidably brought into contact with each other in an axial direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、自動車等の防振技術分野等に用いられるストラットマウントに関する。 The present invention relates to a strut mount used in the field of vibration isolation technology for automobiles and the like.

軽乗用車や普通乗用車等に用いられる車体の防振支持機構として、ショックアブソーバをストラットとして用いるストラット式サスペンションが知られており、このストラット式サスペンションには、ショックアブソーバやコイルスプリング等とともに、その上部位置にストラットマウントが装着されている（特許文献１参照）。 A strut-type suspension using a shock absorber as a strut is known as a vibration-proof support mechanism for a vehicle body used in a mini passenger car or a normal passenger car. A strut mount is attached to the (see Patent Document 1).

このストラットマウントは一般に、軸方向におけるバネ特性が乗り心地特性に影響を及ぼし、軸直角方向におけるバネ特性が操縦安定特性に影響を及ぼしているので、乗り心地特性を向上させるためには軸方向のバネ特性を柔らかくし、操縦安定特性を向上させるためには軸直角方向のばね特性を硬くすることが行なわれている。 In general, the strut mount has a spring characteristic in the axial direction that affects the riding comfort characteristic, and a spring characteristic in the direction perpendicular to the axis has an influence on the steering stability characteristic. In order to soften the spring characteristics and improve the steering stability characteristics, the spring characteristics in the direction perpendicular to the axis are hardened.

従来のストラットマウント１０１は、図２に示すように、車体（図示せず）に組付けられる外方部材１０２と、外方部材１０２と同心で配置されショックアブソーバ（図示せず）に組付けられる内方部材１０３と、外方部材１０２と内方部材１０３とに接合するゴム状弾性体１０４とにより構成されている。 As shown in FIG. 2, the conventional strut mount 101 is an outer member 102 that is assembled to a vehicle body (not shown), a concentric arrangement with the outer member 102, and a shock absorber (not shown). The inner member 103 is composed of an outer member 102 and a rubber-like elastic body 104 joined to the inner member 103.

この構成において、ストラットマウント１０１の外方部材１０２が車体に内方部材１０３がショックアブソーバに其々取付けられると、外方部材１０２および内方部材１０３間における軸直角方向（図２の水平方向）の相対移動により作用する荷重をゴム状弾性体１０４の圧縮・引張り変形で受け、外方部材１０２および内方部材１０３間における軸方向（図２の垂直方向）の相対移動により作用する荷重をゴム状弾性体１０４の剪断変形で受けている。 In this configuration, when the outer member 102 of the strut mount 101 is attached to the vehicle body and the inner member 103 is attached to the shock absorber, the direction perpendicular to the axis between the outer member 102 and the inner member 103 (horizontal direction in FIG. 2). The load acting by the relative movement of the elastic member 104 is received by the compression / tensile deformation of the rubber-like elastic body 104, and the load acting by the relative movement in the axial direction (vertical direction in FIG. 2) between the outer member 102 and the inner member 103 is rubber. The elastic body 104 is subjected to shear deformation.

したがって、乗り心地特性を改良するために、ゴム状弾性体１０４の軸方向におけるばね特性を柔らかくする必要があるが、その結果、軸直角方向におけるばね特性も柔らかくなり、操縦安定特性が悪化するという欠点があった。 Therefore, in order to improve the riding comfort characteristics, it is necessary to soften the spring characteristics in the axial direction of the rubber-like elastic body 104. As a result, the spring characteristics in the direction perpendicular to the axis also become soft, and the steering stability characteristics deteriorate. There were drawbacks.

また、下記特許文献２においては、上記課題を解決するために、外方部材と内方部材との径方向間隙に設けられているゴム状弾性体とは別体に、外方部材と内方部材との軸方向間隙にくびれを付けたゴム状弾性体を設けることが提案されているが、本発明とは、構成を異にしている。 Further, in Patent Document 2 below, in order to solve the above problem, the outer member and the inner member are separated from the rubber-like elastic member provided in the radial gap between the outer member and the inner member. Providing a rubber-like elastic body with a constriction in the axial gap with the member has been proposed, but the configuration is different from that of the present invention.

特開２０００−１７７３５１号公報JP 2000-177351 A 実開平０６−０５８２５２号公報Japanese Utility Model Publication No. 06-058252

本発明は以上の点に鑑みて、軸方向における乗り心地特性と軸直角方向における操縦安定特性の両特性を同時に良好することができるストラットマウントを提供することを目的とする。 In view of the above, an object of the present invention is to provide a strut mount capable of simultaneously improving both the riding comfort characteristics in the axial direction and the steering stability characteristics in the direction perpendicular to the axis.

上記目的を達成するため、本発明の請求項１にかかるストラットマウントは、車体に組付けられる外方部材と、該外方部材と同心で配置されショックアブソーバに組付けられる内方部材と、前記両部材に接合するゴム状弾性体とを備えるストラットマウントにおいて、前記外方部材の内周側面に接合する第一樹脂材と前記内方部材の外周側面に接合する第二樹脂材とを軸方向に摺動可能な状態で当接させたことを特徴とするものである。 In order to achieve the above object, a strut mount according to claim 1 of the present invention includes an outer member assembled to a vehicle body, an inner member arranged concentrically with the outer member and assembled to a shock absorber, In a strut mount including a rubber-like elastic body that is bonded to both members, a first resin material that is bonded to the inner peripheral side surface of the outer member and a second resin material that is bonded to the outer peripheral side surface of the inner member are axially disposed. It is characterized by being brought into contact in a slidable state.

本発明は、以下の効果を奏する。 The present invention has the following effects.

すなわち、上記構成を備えた本発明のストラットマウントは、軸方向における乗り心地特性を良好にするためにゴム状弾性体のばね特性を柔らかくしても、第一樹脂材と第二樹脂材とが径方向に対向して当接しているので、軸直角方向のばね特性が柔らかくなることがなく、従って操縦安定性特性を良好にすることができる。 That is, the strut mount of the present invention having the above-described configuration is provided with the first resin material and the second resin material even if the spring characteristics of the rubber-like elastic body are softened in order to improve the riding comfort characteristics in the axial direction. Since they are in contact with each other in the radial direction, the spring characteristic in the direction perpendicular to the axis does not become soft, and therefore the steering stability characteristic can be improved.

また、乗り心地特性を良好にするためにゴム状弾性体の軸方向のばね特性を柔らかくしたときに、第一樹脂材と第二樹脂材とは軸方向に摺動可能な状態で当接しているので、軸方向におけるばね特性を柔らかい状態で維持することができ、乗り心地特性をゴム状弾性体のばね特性通りに良好にすることができる。 Also, when the spring characteristics in the axial direction of the rubber-like elastic body are softened in order to improve the riding comfort characteristics, the first resin material and the second resin material are in contact with each other while being slidable in the axial direction. Therefore, the spring characteristics in the axial direction can be maintained in a soft state, and the riding comfort characteristics can be improved according to the spring characteristics of the rubber-like elastic body.

以下に図面を参照して、この発明の好適な実施形態を例示して説明する。 DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings.

図１は、本発明を適用したストラットマウントの要部断面図であり、このストラットマウント１は、外方部材２と、内方部材３と、ゴム状弾性体４と、第一樹脂材５、第二樹脂材６とを備えている。 FIG. 1 is a cross-sectional view of a main part of a strut mount to which the present invention is applied. The strut mount 1 includes an outer member 2, an inner member 3, a rubber-like elastic body 4, a first resin material 5, And a second resin material 6.

外方部材２は、プレス成形加工した鋼板であって、中央に段付きを有する外方円筒部２１と、外方円筒部２１の軸方向上端（図上上側）から外径方向に延び穿設されているボルト孔２２に挿通されたボルト２３で車体（図示せず）に組付けられる外方フランジ部２４とから構成されている。 The outer member 2 is a press-formed steel plate, and is provided with an outer cylindrical portion 21 having a step at the center and an axially upper end (upper side in the drawing) of the outer cylindrical portion 21 extending in the outer radial direction. The outer flange portion 24 is assembled to a vehicle body (not shown) with a bolt 23 inserted through the bolt hole 22 formed therein.

内方部材３は、プレス成形加工した鋼板であって外方部材２と同心で内方に配置され、中央に段付きを有する内方第一円筒部３１と、内方第一円筒部３１に軸方向下端（図上下側）から外径方向に延びる内方フランジ部３２と、内方フランジ部３２の外径端部から軸方向下方に延びる内方第二円筒部３３とから構成されており、内方第一円筒部３１の内側に挿通されるショックアブソーバ（図示せず）に組付けられている。 The inner member 3 is a press-formed steel plate that is concentrically arranged inward with the outer member 2 and has an inner first cylindrical portion 31 having a step at the center and an inner first cylindrical portion 31. An inner flange portion 32 extending in the outer diameter direction from the lower end in the axial direction (upper and lower sides in the figure) and an inner second cylindrical portion 33 extending downward in the axial direction from the outer diameter end portion of the inner flange portion 32 The shock absorber (not shown) inserted inside the inner first cylindrical portion 31 is assembled.

ゴム状弾性体４は、天然ゴム若しくは合成ゴムからなるコンパウンドで成形された筒状であって、内周側面４１と軸方向下面４２が内方部材３に加硫接着し、外周側面４３が外方部材２に加硫接着している。 The rubber-like elastic body 4 has a cylindrical shape formed of a compound made of natural rubber or synthetic rubber, and the inner peripheral side surface 41 and the axial lower surface 42 are vulcanized and bonded to the inner member 3, and the outer peripheral side surface 43 is outside. The side member 2 is vulcanized and bonded.

第一樹脂材５は、ＰＴＦＥ等の樹脂若しくは複合材で成形された筒状であって、外周側面５１が外方部材２の外方円筒部２１に形成されている外方段付き２５より上方に垂直に延びる垂直円筒部２６の内周側面２７に加硫接着し、下部に形成されている第一段差５２が外方円筒部２１の外方段付き２５に加硫接着している。また、第二樹脂材６は、ＰＴＦＥ等の樹脂若しくは複合材で成形された筒状であって、内周側面６１が内方部材３の内方第一円筒部３１に形成されている内方段付き３４より上方に垂直に延びる小径円筒部３５の外周側面３６に加硫接着し、下部に形成されている第二段差６２が内方第一円筒部３１の内方段付き３４に加硫接着している。そして、第一樹脂材５の内周側面５３と第二樹脂材６の外周側面６３とが軸方向に摺動可能な状態で、径方向に対向して当接している。 The first resin material 5 is a cylinder formed of a resin such as PTFE or a composite material, and the outer peripheral side surface 51 is above the outer stepped portion 25 formed in the outer cylindrical portion 21 of the outer member 2. The first step 52 formed in the lower portion is vulcanized and bonded to the outer stepped portion 25 of the outer cylindrical portion 21. Further, the second resin material 6 is a cylindrical shape formed of a resin such as PTFE or a composite material, and an inner side surface 61 is formed on the inner first cylindrical portion 31 of the inner member 3. The second step 62 formed at the lower portion is vulcanized to the inner step 34 of the inner first cylindrical portion 31 by being vulcanized and bonded to the outer peripheral side surface 36 of the small diameter cylindrical portion 35 extending vertically upward from the step 34. Glued. Then, the inner peripheral side surface 53 of the first resin material 5 and the outer peripheral side surface 63 of the second resin material 6 are in contact with each other in the radial direction while being slidable in the axial direction.

上記構成においては、内方部材３に組付けられたショックアブソーバからの振動等により外方部材２と内方部材３とが軸直角方向に相対移動することにより作用する荷重は、外方部材２の内周側面２７に接合する第一樹脂材５と内方部材３の外周側面３６に接合する第二樹脂材６とが径方向に対向して当接しているので、当接している第一樹脂材５と第二樹脂材６で受けることになる。すなわち、乗り心地特性を良好にするためにゴム状弾性体４の軸方向のばね特性を柔らかくした結果、ゴム状弾性体４の軸直角方向のばね特性が柔らかくなっても、軸直角方向の荷重に対しては、径方向に対向して当接している第一樹脂材５と第二樹脂材６が主に受けることになる。よって、ゴム状弾性体４の軸方向のばね特性を柔らかくしてもストラットマウント１としての軸直角方向のばね特性が柔らかくなることはなく、操縦安定特性を良好に維持することが可能となる。 In the above configuration, the load applied by the relative movement of the outer member 2 and the inner member 3 in the direction perpendicular to the axis due to vibration from the shock absorber assembled to the inner member 3 is the outer member 2. The first resin material 5 bonded to the inner peripheral side surface 27 of the inner member 3 and the second resin material 6 bonded to the outer peripheral side surface 36 of the inner member 3 are in contact with each other in the radial direction. It is received by the resin material 5 and the second resin material 6. That is, as a result of softening the spring characteristics in the axial direction of the rubber-like elastic body 4 in order to improve the riding comfort characteristics, even if the spring characteristics in the perpendicular direction to the rubber-like elastic body 4 become soft, the load in the direction perpendicular to the axis In contrast, the first resin material 5 and the second resin material 6 which are in contact with each other in the radial direction are mainly received. Therefore, even if the spring characteristic in the axial direction of the rubber-like elastic body 4 is softened, the spring characteristic in the direction perpendicular to the axis as the strut mount 1 is not softened, and the steering stability characteristic can be maintained well.

また、径方向に対向して当接している外方部材２の内周側面２７に接合する第一樹脂材５と内方部材３の外周側面３６に接合する第二樹脂材６とは軸方向に摺動可能な状態であるので、外方部材２と内方部材３の軸方向に相対移動することにより作用する荷重は、ゴム状弾性体４のみが受けることになる。したがって、乗り心地特性を良好にするためにゴム状弾性体４の軸方向のばね特性を柔らかくすると、そのままストラットマウント１としての軸方向のばね特性が柔らかくなり、当初設定通りの乗り心地特性を発揮させることが可能となる。 Further, the first resin material 5 joined to the inner peripheral side surface 27 of the outer member 2 that is in contact with the radial direction and the second resin material 6 joined to the outer peripheral side surface 36 of the inner member 3 are in the axial direction. Therefore, only the rubber-like elastic body 4 receives a load that acts when the outer member 2 and the inner member 3 move relative to each other in the axial direction. Therefore, if the axial spring characteristic of the rubber-like elastic body 4 is softened in order to improve the riding comfort characteristic, the axial spring characteristic as the strut mount 1 becomes soft as it is, and the riding comfort characteristic as initially set is exhibited. It becomes possible to make it.

本発明に係るストラットマウントの要部断面図Sectional drawing of the principal part of the strut mount which concerns on this invention 従来例に係るストラットマウントの要部断面図Cross-sectional view of the main part of a conventional strut mount

符号の説明Explanation of symbols

１ストラットマウント
２外方部材
３内方部材
４ゴム状弾性体
５，６樹脂材
２１，２６，３１，３３，３５円筒部
２４，３２フランジ部
２５，３４段付き
２２ボルト孔
２３ボルト
５１，６３外周側面
５２，６２段差
５３，６１内周側面 DESCRIPTION OF SYMBOLS 1 Strut mount 2 Outer member 3 Inner member 4 Rubber-like elastic body 5,6 Resin material 21,26,31,33,35 Cylindrical part 24,32 Flange part 25,34 Step 22 Bolt hole 23 Bolt 51,63 Outer peripheral side 52, 62 Step 53, 61 Inner peripheral side

Claims

車体に組付けられる外方部材と、該外方部材と同心で配置されショックアブソーバに組付けられる内方部材と、前記両部材に接合するゴム状弾性体とを備えるストラットマウントにおいて、
前記外方部材の内周側面に接合する第一樹脂材と前記内方部材の外周側面に接合する第二樹脂材とを軸方向に摺動可能な状態で当接させたことを特徴とするストラットマウント。 In a strut mount comprising an outer member assembled to a vehicle body, an inner member arranged concentrically with the outer member and assembled to a shock absorber, and a rubber-like elastic body joined to both the members,
The first resin material bonded to the inner peripheral side surface of the outer member and the second resin material bonded to the outer peripheral side surface of the inner member are brought into contact with each other while being slidable in the axial direction. Strut mount.