JP2007162752A - Vibration isolator - Google Patents

Vibration isolator Download PDF

Info

Publication number
JP2007162752A
JP2007162752A JP2005356770A JP2005356770A JP2007162752A JP 2007162752 A JP2007162752 A JP 2007162752A JP 2005356770 A JP2005356770 A JP 2005356770A JP 2005356770 A JP2005356770 A JP 2005356770A JP 2007162752 A JP2007162752 A JP 2007162752A
Authority
JP
Japan
Prior art keywords
cushion rubber
vehicle body
piston rod
body side
side member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2005356770A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Seno
喜之 瀬野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP2005356770A priority Critical patent/JP2007162752A/en
Publication of JP2007162752A publication Critical patent/JP2007162752A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Vehicle Body Suspensions (AREA)
  • Vibration Prevention Devices (AREA)
  • Springs (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent contact of metal members on a vehicle body side and on a piston rod side around the opening of a vehicle body side member without deteriorating the durability of a cushion rubber in a vibration isolator to elastically joint the piston rod of a shock absorber for a vehicle body in a suspension mechanism of a vehicle. <P>SOLUTION: The vibration isolator 10 comprises: the vehicle body side member 12 having the opening 13; an upper side mounting member 14 and a lower side mounting member 16 arranged upwards or downwards; and the upper side cushion rubber 18 and the lower side cushion rubber 20 disposed between the mounting member and the vehicle body side member. A cylindrical rubber 28 which protrudes toward an axial direction A, and surrounds the outer periphery of the piston rod 1 in the opening 13 of the vehicle body side member 12, is integrally installed in the lower surface 18c of the upper cushion rubber 18. An annular recess 30 dropped in the axial direction is installed in the root 28a outer periphery of the cylindrical rubber 28. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、自動車などの車両のサスペンション機構におけるショックアブソーバのピストンロッドを、車体に対して弾性的に結合するための防振装置に関するものである。   The present invention relates to a vibration isolator for elastically coupling a piston rod of a shock absorber in a suspension mechanism of a vehicle such as an automobile to a vehicle body.

車両のサスペンション機構と車体との間に介設される防振装置は、路面から車体に伝達される振動を減衰ないし低減するものであり、従来より種々の構成のものが提案されている（下記特許文献１〜３参照）。   An anti-vibration device interposed between a vehicle suspension mechanism and a vehicle body attenuates or reduces vibration transmitted from the road surface to the vehicle body. Patent Literatures 1 to 3).

図６は、その一例を示すものであり、防振装置１００は、ショックアブソーバのピストンロッド１０１が貫通する開口部１０２ａを備える車体側部材１０２と、車体側部材１０２の上方に配されてピストンロッド１０１に固定される上側取付部材１０８と、車体側部材１０２の下方に配されてピストンロッド１０１に固定される下側取付部材１０９と、ピストンロッド１０１が貫通する環状をなして車体側部材１０２と上側取付部材１０８との間にて軸方向に圧縮された状態に配される上側クッションゴム１０５と、ピストンロッド１０１が貫通する環状をなして車体側部材１０２と下側取付部材１０９との間にて軸方向に圧縮された状態に配される下側クッションゴム１０６と、上側クッションゴム１０５と車体側部材１０２との間に配されて上側クッションゴム１０５の下部外周面を保持する上側保持部材１０３と、下側クッションゴム１０６と車体側部材１０２との間に配されて下側クッションゴム１０６の上部外周面を保持する下側保持部材１０４と、上下のクッションゴム１０５，１０６内に配されてピストンロッド１０１をその内部に受け入れるとともに上側取付部材１０８と下側取付部材１０９との間隔を規定するスリーブ１０７と、を備えてなる。そして、かかる構成により、防振装置１００は、車体側部材１０２に対するピストンロッド１０１の上方への変位（バウンド側変位）に対しては下側クッションゴム１０６が圧縮され、下方への変位（リバウンド側変位）に対しては上側クッションゴム１０５が圧縮されて、振動が吸収されるようになっている。
特開平１１−１３８２５号公報 特開２０００−１９９５３７号公報 特開２００４−１００８７８号公報 FIG. 6 shows an example thereof. The vibration isolator 100 includes a vehicle body side member 102 having an opening 102a through which a piston rod 101 of a shock absorber passes, and a piston rod disposed above the vehicle body side member 102. An upper mounting member 108 fixed to 101, a lower mounting member 109 disposed below the vehicle body side member 102 and fixed to the piston rod 101, and a vehicle body side member 102 having an annular shape through which the piston rod 101 passes. An upper cushion rubber 105 disposed in an axially compressed state between the upper mounting member 108 and an annular shape through which the piston rod 101 penetrates between the vehicle body side member 102 and the lower mounting member 109. And disposed between the lower cushion rubber 106 disposed in a compressed state in the axial direction, and between the upper cushion rubber 105 and the vehicle body side member 102. An upper holding member 103 that holds the lower outer peripheral surface of the upper cushion rubber 105 and a lower holding member that is disposed between the lower cushion rubber 106 and the vehicle body side member 102 and holds the upper outer peripheral surface of the lower cushion rubber 106 A member 104 and a sleeve 107 disposed in the upper and lower cushion rubbers 105 and 106 for receiving the piston rod 101 therein and defining the distance between the upper mounting member 108 and the lower mounting member 109 are provided. With this configuration, the vibration isolator 100 compresses the lower cushion rubber 106 with respect to the upward displacement (bound side displacement) of the piston rod 101 with respect to the vehicle body side member 102, and the downward displacement (rebound side). For the displacement, the upper cushion rubber 105 is compressed to absorb the vibration.
Japanese Patent Laid-Open No. 11-13825 JP 2000-199537 A Japanese Patent Laid-Open No. 2004-100088

上記のような構造を持つ防振装置１００においては、車体側部材１０２と、その開口部１０２ａを貫通するピストンロッド１０１又はスリーブ１０７との間で、金属部材同士の接触が生じる可能性がある。かかる金属部材同士の接触を防止するためには、上側又は下側のクッションゴムから筒状のゴム部を延設して、車体側部材の開口部内周面とピストンロッド又はスリーブとの間に介在させることが有効である。しかしながら、このような筒状ゴム部をクッションゴムの上面又は下面からそのまま突出形成したのでは、クッションゴムの圧縮時に筒状ゴム部の根元部に応力が集中して亀裂が生じるおそれがある。   In the vibration isolator 100 having the above-described structure, contact between the metal members may occur between the vehicle body side member 102 and the piston rod 101 or the sleeve 107 that penetrates the opening 102a. In order to prevent contact between the metal members, a cylindrical rubber portion is extended from the upper or lower cushion rubber and interposed between the inner peripheral surface of the opening of the vehicle body side member and the piston rod or sleeve. It is effective to make it. However, if such a cylindrical rubber portion is formed so as to protrude from the upper surface or the lower surface of the cushion rubber, stress may concentrate on the base portion of the cylindrical rubber portion when the cushion rubber is compressed, and cracks may occur.

本発明は、このような事情に鑑みてなされたものであり、クッションゴムの耐久性を損なうことなく、車体側部材の開口部周りでの車体側とピストンロッド側との金属部材同士の接触を防止することができる防振装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and contact between the metal members on the vehicle body side and the piston rod side around the opening of the vehicle body side member without impairing the durability of the cushion rubber. An object is to provide a vibration isolator that can be prevented.

本発明に係る防振装置は、車両のサスペンション機構におけるショックアブソーバのピストンロッドを車体に対して弾性的に結合するための防振装置であって、前記ピストンロッドが貫通する開口部を備える車体側部材と、前記車体側部材の上方に配され前記ピストンロッドに固定される上側取付部材と、前記車体側部材の下方に配され前記ピストンロッドに固定される下側取付部材と、前記ピストンロッドが貫通する環状をなして前記車体側部材と前記上側取付部材との間にて軸方向に圧縮された状態に配される上側クッションゴムと、前記ピストンロッドが貫通する環状をなして前記車体側部材と前記下側取付部材との間にて軸方向に圧縮された状態に配される下側クッションゴムとを備えるものである。そして、前記上側クッションゴムの下面又は前記下側クッションゴムの上面に、軸方向に突出し前記車体側部材の前記開口部の内側において前記ピストンロッドの外周を取り囲む筒状ゴム部が一体に設けられるとともに、前記筒状ゴム部の根元部外周に軸方向に陥没した環状凹部が設けられている。   A vibration isolator according to the present invention is a vibration isolator for elastically coupling a piston rod of a shock absorber in a vehicle suspension mechanism to a vehicle body, and includes an opening through which the piston rod passes. A member, an upper mounting member disposed above the vehicle body side member and fixed to the piston rod, a lower mounting member disposed below the vehicle body side member and fixed to the piston rod, and the piston rod An upper cushion rubber disposed in an axially compressed state between the vehicle body side member and the upper mounting member, and an annular body through which the piston rod penetrates. And a lower cushion rubber disposed in a state compressed in the axial direction between the lower mounting member and the lower mounting member. A cylindrical rubber portion that protrudes in the axial direction and surrounds the outer periphery of the piston rod inside the opening of the vehicle body side member is integrally provided on the lower surface of the upper cushion rubber or the upper surface of the lower cushion rubber. An annular recess recessed in the axial direction is provided on the outer periphery of the base portion of the cylindrical rubber portion.

上記構造によれば、上側又は下側のクッションゴムに設けた筒状ゴム部が、車体側部材の開口部の内側においてピストンロッドの外周を取り囲み、すなわち、ピストンロッドとその外周の車体側の部材との間に介在しているため、上記開口部周りでの車体側とピストンロッド側との金属部材同士の接触を防止することができる。しかも、該筒状ゴム部の根元部外周に環状凹部が設けられているため、クッションゴムが軸方向に圧縮されたときに、筒状ゴム部の根元部での応力集中を軽減して、亀裂の発生を防止することができる。   According to the above structure, the cylindrical rubber portion provided on the upper or lower cushion rubber surrounds the outer periphery of the piston rod inside the opening of the vehicle body side member, that is, the piston rod and the vehicle body side member of the outer periphery thereof. Between the metal members on the vehicle body side and the piston rod side around the opening can be prevented. In addition, since an annular recess is provided on the outer periphery of the base portion of the cylindrical rubber portion, when the cushion rubber is compressed in the axial direction, stress concentration at the base portion of the cylindrical rubber portion is reduced and cracks are generated. Can be prevented.

上記防振装置においては、前記上側クッションゴムと前記車体側部材との間又は前記下側クッションゴムと前記車体側部材との間に、前記上側クッションゴムの下部外周面又は前記下側クッションゴムの上部外周面を保持する環状側壁部を備える保持部材が設けられ、前記保持部材は、前記ピストンロッドが貫通する貫通孔を備えるとともに、該貫通孔の開口縁部に前記車体側部材の開口部に内嵌する軸方向に延びる筒状延設部が設けられ、前記筒状ゴム部が前記筒状延設部の内側に嵌合状態に保持されていることが好ましい。   In the vibration isolator, between the upper cushion rubber and the vehicle body side member or between the lower cushion rubber and the vehicle body side member, a lower outer peripheral surface of the upper cushion rubber or the lower cushion rubber A holding member having an annular side wall for holding the upper outer peripheral surface is provided, and the holding member has a through hole through which the piston rod penetrates, and an opening edge of the through hole has an opening in the vehicle body side member. It is preferable that a cylindrical extension portion extending in the axial direction to be fitted is provided, and the cylindrical rubber portion is held in a fitted state inside the cylindrical extension portion.

本発明の他の特徴によれば、前記上側クッションゴム又は下側クッションゴムの内周面における軸方向中央部に、周方向に延びる環状突起が設けられていることが好ましい。かかる環状突起を設けることにより、ピストンロッドとクッションゴムとの間に水が侵入するのを防止することができる。特に、環状突起をクッションゴムの軸方向中央部に設けることにより、クッションゴムの上下いずれからの水の侵入に対しても、環状突起でそれ以上の水の侵入を食い止めることができ、ピストンロッドとクッションゴムとの間の水の侵入面積を小さくして、水が介在することによる性能低下を軽減することができる。また、かかる環状突起を車両への組み付け時における脱落防止手段として機能させることもできる。このような環状突起は、上側クッションゴムと下側クッションゴムの両方に設けることが好ましい。   According to another feature of the present invention, it is preferable that an annular protrusion extending in the circumferential direction is provided at a central portion in the axial direction on the inner circumferential surface of the upper cushion rubber or the lower cushion rubber. By providing such an annular protrusion, it is possible to prevent water from entering between the piston rod and the cushion rubber. In particular, by providing an annular protrusion at the central portion of the cushion rubber in the axial direction, it is possible to prevent further intrusion of water from the upper and lower sides of the cushion rubber by the annular protrusion. It is possible to reduce the water intrusion area between the cushion rubber and the performance deterioration due to the water interposition. Further, the annular protrusion can function as a drop-off preventing means when assembled to the vehicle. Such an annular protrusion is preferably provided on both the upper cushion rubber and the lower cushion rubber.

本発明の防振装置であると、クッションゴムの耐久性を損なうことなく、車体側部材の開口部周りでの車体側とピストンロッド側との金属部材同士の接触を防止することができる。   With the vibration isolator of the present invention, contact between the metal members on the vehicle body side and the piston rod side around the opening of the vehicle body side member can be prevented without impairing the durability of the cushion rubber.

以下に本発明の実施形態について図面に基づいて説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は本発明の一実施形態に係る防振装置１０の断面図である。同防振装置１０は、車両のサスペンション機構におけるショックアブソーバのピストンロッドの上端部を車体に対して弾性的に結合するためのものであり、上下方向Ｚに開口してピストンロッド１が貫通する円形の開口部１３を備える車体側部材１２と、その上下に配された上側取付部材１４及び下側取付部材１６と、これら上下の取付部材１４，１６と車体側部材１２との間に配された上側クッションゴム１８及び下側クッションゴム２０とを備えて構成されている。   FIG. 1 is a cross-sectional view of a vibration isolator 10 according to an embodiment of the present invention. The vibration isolator 10 is for elastically coupling an upper end portion of a piston rod of a shock absorber in a vehicle suspension mechanism to a vehicle body, and is a circular shape that opens in the vertical direction Z and penetrates the piston rod 1. The vehicle body side member 12 including the opening 13, the upper mounting member 14 and the lower mounting member 16 disposed above and below the vehicle body side member 12, and the upper and lower mounting members 14, 16 and the vehicle body side member 12. The upper cushion rubber 18 and the lower cushion rubber 20 are provided.

上側取付部材１４は、金属よりなる円形板状部材であり、上側クッションゴム１８の上面に当接配置される。上側取付部材１４は、中心にピストンロッド１が挿通される挿通穴２２を備えて、該ピストンロッド１をナット２で締め付けることによりヒストンロッド１に固定されるように構成されている。上側取付部材１４は、上側クッションゴム１８の圧縮時における望ましいばね特性を発揮するように、周縁部１４ａが下方に向けてわずかに段差状に落ち込んだ形状とされている。   The upper mounting member 14 is a circular plate member made of metal, and is disposed in contact with the upper surface of the upper cushion rubber 18. The upper mounting member 14 includes an insertion hole 22 through which the piston rod 1 is inserted at the center, and is configured to be fixed to the histone rod 1 by tightening the piston rod 1 with a nut 2. The upper mounting member 14 has a shape in which the peripheral edge portion 14a is slightly stepped downward so as to exhibit desirable spring characteristics when the upper cushion rubber 18 is compressed.

下側取付部材１６は、金属よりなる円形板状部材であり、下側クッションゴム２０の下面に当接配置される。下側取付部材１６は、中心にピストンロッド１が挿通される挿通穴２４を備えて、上記ナット２による締付によりピストンロッド１に固定されるように構成されている。下側取付部材１６は、下側クッションゴム２０の圧縮時における望ましいばね特性を発揮するように、周縁部１６ａが上方に向けてわずかに段差状に***した形状とされている。   The lower mounting member 16 is a circular plate-shaped member made of metal, and is disposed in contact with the lower surface of the lower cushion rubber 20. The lower mounting member 16 includes an insertion hole 24 through which the piston rod 1 is inserted at the center, and is configured to be fixed to the piston rod 1 by tightening with the nut 2. The lower mounting member 16 has a shape in which the peripheral edge portion 16a is slightly raised in a step shape so as to exhibit desirable spring characteristics when the lower cushion rubber 20 is compressed.

上側クッションゴム１８は、ピストンロッド１が貫通する環状をなすゴム状部材であり、上記開口部１３と同軸的に配されて、車体側部材１２と上側取付部材１４との間にて軸方向Ａ（即ち、上下方向Ｚ）に圧縮された状態に組み付けられる。詳細には、上側クッションゴム１８は、図２，３に示すように、軸方向Ａにおいて一定の外径を持つ円筒状の本体部１８ａを備えてなり、その中空部１８ｂの上端部には、上方の開口面側に向けて漸次に径大となるテーパ面部２６が設けられている。かかるテーパ面部２６を設けることで、軸方向Ａの圧縮時における中空部１８ｂの開口端部でのピストンロッド１との摩擦を低減し、また当該開口端部での亀裂の発生を抑えることができる。   The upper cushion rubber 18 is an annular rubber member through which the piston rod 1 penetrates, and is disposed coaxially with the opening 13 so as to be axially connected between the vehicle body side member 12 and the upper mounting member 14. In other words, it is assembled in a state compressed in the vertical direction Z. Specifically, as shown in FIGS. 2 and 3, the upper cushion rubber 18 includes a cylindrical main body portion 18a having a constant outer diameter in the axial direction A, and an upper end portion of the hollow portion 18b includes A tapered surface portion 26 that gradually increases in diameter toward the upper opening surface side is provided. By providing such a tapered surface portion 26, friction with the piston rod 1 at the opening end portion of the hollow portion 18b during compression in the axial direction A can be reduced, and occurrence of cracks at the opening end portion can be suppressed. .

上側クッションゴム１８の下面１８ｃには、軸方向Ａに突出した筒状ゴム部２８が一体に設けられている。筒状ゴム部２８は、上側クッションゴム１８の中空部１８ｂにおける開口縁部から軸方向に延設されており、上記本体部１８ａにおける内径と同一の内径を持ち、かつ本体部１８ａよりも外径の小さい薄肉円筒状をなしている。そして、図１に示すように、筒状ゴム部２８は、車体側部材１２の開口部１３の内側においてピストンロッド１の外周を取り囲むよう構成されており、この例では、上記本体部１８ａとともにピストンロッド１の外周面に直接嵌合状態に装着される。また、筒状ゴム部２８は、車体側部材１２の厚み方向の全体にわたって開口部１３とピストンロッド１との間に介在するように長さ寸法が設定されている。   A cylindrical rubber portion 28 protruding in the axial direction A is integrally provided on the lower surface 18 c of the upper cushion rubber 18. The cylindrical rubber portion 28 extends in the axial direction from the opening edge portion of the hollow portion 18b of the upper cushion rubber 18, has the same inner diameter as that of the main body portion 18a, and has an outer diameter larger than that of the main body portion 18a. It has a small thin cylindrical shape. As shown in FIG. 1, the cylindrical rubber portion 28 is configured to surround the outer periphery of the piston rod 1 inside the opening 13 of the vehicle body side member 12. In this example, the cylindrical rubber portion 28 is a piston together with the main body portion 18a. The rod 1 is directly fitted into the outer peripheral surface. The length of the cylindrical rubber portion 28 is set so as to be interposed between the opening 13 and the piston rod 1 over the entire thickness direction of the vehicle body side member 12.

図２，３に示すように、筒状ゴム部２８の根元部２８ａの外周には、軸方向Ａの上方に陥没した環状凹部３０が周方向Ｃの全周にわたって設けられている。環状凹部３０は、図２において拡大して示すように、断面円弧状に形成されている。そして、その軸方向Ａにおける深さＬは、上側クッションゴム１８の圧縮時における応力集中を低減しながら、同クッションゴム１８本来のばね特性を損なわないように、筒状ゴム部２８の軸方向寸法Ｌ０よりも小さく設定されている。また、同様の目的から、環状凹部３０の径方向（軸直角方向）Ｂにおける幅Ｗは、筒状ゴム部２８の径方向Ｂにおける幅（厚み）Ｗ０よりも大きく、環状凹部３０より径方向外方側の本体部１８ａの幅Ｗ１よりも小さく設定されている。   As shown in FIGS. 2 and 3, an annular recess 30 that is recessed upward in the axial direction A is provided over the entire circumference in the circumferential direction C on the outer periphery of the base portion 28 a of the cylindrical rubber portion 28. The annular recess 30 is formed in an arc shape in cross section, as shown in an enlarged manner in FIG. The depth L in the axial direction A is an axial dimension of the cylindrical rubber portion 28 so as to reduce stress concentration during compression of the upper cushion rubber 18 and not to deteriorate the original spring characteristics of the cushion rubber 18. It is set smaller than L0. For the same purpose, the width W in the radial direction (axis-perpendicular direction) B of the annular recess 30 is larger than the width (thickness) W0 in the radial direction B of the cylindrical rubber portion 28 and is more radially outward than the annular recess 30. The width is set smaller than the width W1 of the main body 18a on the side.

上側クッションゴム１８には、また、中空部１８ｂにおける内周面１８ｄにおいて、上記本体部１８ａの軸方向Ａにおける中央部に、周方向Ｃに延びる環状突起３２が１本設けられている。環状突起３２は、図２において拡大して示すように、この実施形態では断面円弧状に形成されているが、断面三角形状等、種々の形状を採用することができる。また、中空部１８ｂの内径Ｄ０がピストンロッド１の外径Ｄ１（図１参照）よりもわずかに大きく設定されているのに対し、環状突起３２は、その先端での内径Ｄがピストンロッド１の外径Ｄ１よりも小さくなるように設定されている。   The upper cushion rubber 18 is also provided with one annular protrusion 32 extending in the circumferential direction C at the center in the axial direction A of the main body 18a on the inner peripheral surface 18d of the hollow portion 18b. As shown in an enlarged view in FIG. 2, the annular protrusion 32 is formed in a circular arc shape in this embodiment, but various shapes such as a triangular cross section can be adopted. Further, the inner diameter D0 of the hollow portion 18b is set slightly larger than the outer diameter D1 (see FIG. 1) of the piston rod 1, whereas the annular protrusion 32 has an inner diameter D at the tip of the piston rod 1. It is set to be smaller than the outer diameter D1.

図１に示すように、上側クッションゴム１８と車体側部材１２との間には、金属からなる保持部材３４が設けられている。保持部材３４は、上側クッションゴム１８の下面１８ｃを受けて車体側部材１２上に配される部材であり、ピストンロッド１が貫通する貫通孔３６ａを備える底面部３６と、上側クッションゴム１８の下部外周面１８ｅを保持する環状側壁部３８とを備えてなる。環状側壁部３８は、上端ほど外方に広がった傾斜形状とされており、図４に示すように、車両への組付け前の状態では上側クッションゴム１８の下部外周面１８ｅを拘束しておらず、図１に示すように上側クッションゴム１８を圧縮することで下部外周面１８ｅを当接保持するように構成されている。   As shown in FIG. 1, a holding member 34 made of metal is provided between the upper cushion rubber 18 and the vehicle body side member 12. The holding member 34 is a member that is disposed on the vehicle body side member 12 in response to the lower surface 18 c of the upper cushion rubber 18, and includes a bottom surface portion 36 having a through hole 36 a through which the piston rod 1 passes, and a lower portion of the upper cushion rubber 18. And an annular side wall portion 38 for holding the outer peripheral surface 18e. The annular side wall portion 38 has an inclined shape that spreads outward toward the upper end. As shown in FIG. 4, the lower outer peripheral surface 18e of the upper cushion rubber 18 is restrained in a state before being assembled to the vehicle. First, as shown in FIG. 1, the upper outer peripheral rubber 18 is compressed to compress and hold the lower outer peripheral surface 18e.

保持部材３４の貫通孔３６ａの開口縁部３６ｂには、車体側部材１２の開口部１３に内嵌する軸方向Ａに延びる筒状延設部４０が下方に向けて折曲形成されている。そして、この筒状延設部４０の内側に、上記筒状ゴム部２８が嵌合状態に保持されており、筒状延設部４０の下端は筒状ゴム部２８の下端に一致している。   A cylindrical extending portion 40 extending in the axial direction A and fitted into the opening 13 of the vehicle body side member 12 is bent downward at the opening edge 36 b of the through hole 36 a of the holding member 34. The cylindrical rubber portion 28 is held in a fitted state inside the cylindrical extending portion 40, and the lower end of the cylindrical extending portion 40 coincides with the lower end of the cylindrical rubber portion 28. .

下側クッションゴム２０は、ピストンロッド１が貫通する環状をなすゴム状部材であり、上記開口部１３と同軸的に配されて、車体側部材１２と下側取付部材１６との間にて軸方向Ａに圧縮された状態に組み付けられる。詳細には、下側クッションゴム２０は、図５に示すように、軸方向Ａにおいて一定の外径を持つ円筒状をなし、その中空部２０ａの上端部及び下端部に、開口面側に向けて漸次に径大となるテーパ面部４２，４２が設けられている。かかるテーパ面部４２を設けることで、軸方向Ａの圧縮時における中空部２０ａの開口端部でのピストンロッド１との摩擦を低減し、また当該開口端部での亀裂の発生を抑えることができる。また、この場合、テーパ面部４２を設けたことでピストンロッド１の挿入性にも優れる。   The lower cushion rubber 20 is an annular rubber member through which the piston rod 1 penetrates. The lower cushion rubber 20 is arranged coaxially with the opening 13 and is pivoted between the vehicle body side member 12 and the lower mounting member 16. It is assembled in a compressed state in the direction A. Specifically, as shown in FIG. 5, the lower cushion rubber 20 has a cylindrical shape having a constant outer diameter in the axial direction A, and is directed toward the opening surface side at the upper end portion and the lower end portion of the hollow portion 20a. Thus, tapered surface portions 42, 42 that gradually increase in diameter are provided. By providing such a tapered surface portion 42, friction with the piston rod 1 at the opening end portion of the hollow portion 20a during compression in the axial direction A can be reduced, and cracking at the opening end portion can be suppressed. . Further, in this case, the insertion property of the piston rod 1 is excellent by providing the tapered surface portion 42.

下側クッションゴム２０の中空部２０ａにおける内周面２０ｂには、その軸方向Ａにおける中央部に、周方向に延びる環状突起４４が１本設けられている。環状突起４４は、上記の上側クッションゴム１８の環状突起３２と同様の形状を有し、また、中空部２０ａの内径及び環状突起４４の先端での内径とピストンロッド１の外径との関係も、上記の上側クッションゴム１８の場合と同様に構成されている。   On the inner peripheral surface 20b of the hollow portion 20a of the lower cushion rubber 20, one annular protrusion 44 extending in the circumferential direction is provided at the central portion in the axial direction A. The annular protrusion 44 has the same shape as the annular protrusion 32 of the upper cushion rubber 18, and the relationship between the inner diameter of the hollow portion 20a and the inner diameter at the tip of the annular protrusion 44 and the outer diameter of the piston rod 1 is also related. The upper cushion rubber 18 is configured in the same manner as described above.

本実施形態の防振装置１０を製造する際には、まず、上側取付部材１４、下側取付部材１６及び保持部材３４をそれぞれ金属板のプレス加工等により上記所定形状に作製する。また、上側クッションゴム１８と下側クッションゴム２０をそれぞれ成形型を用いて上記所定形状に加硫成形する。そして、図４に示すように、上側クッションゴム１８の上面１８ｆに上側取付部材１４を、下面１８ｃに保持部材３４を、それぞれ接着剤を用いて仮固定する。その後、車体側部材１２の開口部１３に対し、上方から上記図４に示す上側クッションゴム１８の組立体を装着し、また、ピストンロッド１の先端部に下側取付部材１６と下側クッションゴム２０を挿通させた状態で、該ピストンロッド１を開口部１３の下方から差し込み、ピストンロッド１を上側クッションゴム１８の中空部１８ｂに貫通させる。そして、上側取付部材１４の挿通穴２２から上方に突出するピストンロッド１の先端にナット２を配し、該ナット２を軸方向Ａに締め付けることにより、上下のクッションゴム１８，２０が上下の取付部材１４，１６間で軸方向Ａに予圧縮状態に保持される。   When manufacturing the vibration isolator 10 of the present embodiment, first, the upper mounting member 14, the lower mounting member 16, and the holding member 34 are each formed into the predetermined shape by pressing a metal plate or the like. Further, the upper cushion rubber 18 and the lower cushion rubber 20 are each vulcanized and molded into the predetermined shape using a mold. Then, as shown in FIG. 4, the upper mounting member 14 is temporarily fixed to the upper surface 18f of the upper cushion rubber 18, and the holding member 34 is temporarily fixed to the lower surface 18c using an adhesive. Thereafter, an assembly of the upper cushion rubber 18 shown in FIG. 4 is mounted on the opening 13 of the vehicle body side member 12 from above, and the lower mounting member 16 and the lower cushion rubber are attached to the tip of the piston rod 1. In a state where 20 is inserted, the piston rod 1 is inserted from below the opening 13, and the piston rod 1 is passed through the hollow portion 18 b of the upper cushion rubber 18. Then, the nut 2 is arranged at the tip of the piston rod 1 protruding upward from the insertion hole 22 of the upper mounting member 14, and the nut 2 is tightened in the axial direction A so that the upper and lower cushion rubbers 18, 20 are mounted in the upper and lower directions. The members 14 and 16 are held in a precompressed state in the axial direction A.

以上よりなる本実施形態の防振装置１０であると、上側クッションゴム１８に設けた筒状ゴム部２８が、車体側部材１２の開口部１３の内側においてピストンロッド１とその外周の金属製部材である保持部材３４との間に介在しているため、開口部１３周りでの車体側とピストンロッド側との金属部材同士の接触を防止することができる。   In the vibration isolator 10 according to the present embodiment configured as described above, the cylindrical rubber portion 28 provided on the upper cushion rubber 18 includes the piston rod 1 and the metal member on the outer periphery thereof inside the opening 13 of the vehicle body side member 12. Therefore, the contact between the metal members on the vehicle body side and the piston rod side around the opening 13 can be prevented.

しかも、筒状ゴム部２８の根元部２８ａの外周に環状凹部３０が設けられているため、上側クッションゴム１８が軸方向Ａに圧縮されたときに、筒状ゴム部２８の根元部２８ａでの応力集中を軽減して、亀裂の発生を防止することができ、耐久性に優れる。また、本実施形態では、上側クッションゴム１８と保持部材３４とを一体に加硫接着するものではないので、成形性に優れ、また加硫成形後におけるゴムの残留歪みの問題もない。   Moreover, since the annular recess 30 is provided on the outer periphery of the root portion 28a of the cylindrical rubber portion 28, when the upper cushion rubber 18 is compressed in the axial direction A, the root portion 28a of the cylindrical rubber portion 28 Stress concentration can be reduced, cracks can be prevented, and durability is excellent. Further, in the present embodiment, the upper cushion rubber 18 and the holding member 34 are not integrally vulcanized and bonded, so that the moldability is excellent, and there is no problem of residual distortion of rubber after vulcanization molding.

また、この筒状ゴム部２８が保持部材３４の筒状延設部４０の内側に嵌合状態に保持されているので、車体側部材１２の開口部１３への装着性に優れ、また、組付け後は、該筒状延設部４０によって外周面が保護されるので、筒状ゴム部２８の損傷も防止することができる。   Further, since the cylindrical rubber portion 28 is held in a fitted state inside the cylindrical extending portion 40 of the holding member 34, the mounting property to the opening 13 of the vehicle body side member 12 is excellent, and the assembled After the attachment, the outer peripheral surface is protected by the cylindrical extending portion 40, so that the cylindrical rubber portion 28 can be prevented from being damaged.

また、該保持部材３４の環状側壁部３８により上側クッションゴム１８の下部外周面１８ｅが拘束保持されているので、ピストンロッド１の下方への変位（リバウンド側の変位）時に、その変位を小さくすることができる。   Further, since the lower outer peripheral surface 18e of the upper cushion rubber 18 is restrained and held by the annular side wall 38 of the holding member 34, the displacement is reduced when the piston rod 1 is displaced downward (displacement on the rebound side). be able to.

また、上下のクッションゴム１８，２０の内周面に環状突起３２，４４を設けたので、車両への組み付け時に、挿通したピストンロッド１がナット２による締め付け前に外れて脱落してしまうことを防止することができる。特に、上記した中空部１８ｂ，２０ａの内径及び環状突起３２，４４の先端での内径とピストンロッド１の外径との関係により、ピストンロッド１の挿通しやすさを確保しながら、上記脱落防止機能を発揮することができる。   In addition, since the annular protrusions 32 and 44 are provided on the inner peripheral surfaces of the upper and lower cushion rubbers 18 and 20, the piston rod 1 that has been inserted is detached and dropped before being tightened by the nut 2 when assembled to the vehicle. Can be prevented. In particular, due to the relationship between the inner diameters of the hollow portions 18b and 20a and the inner diameters at the tips of the annular protrusions 32 and 44 and the outer diameter of the piston rod 1, the above-mentioned drop-off prevention is ensured while ensuring ease of insertion of the piston rod 1. Function can be demonstrated.

また、上記環状突起３２，４４により、ピストンロッド１とクッションゴム１８，２０との間に水が侵入するのを防止することができる。特に、環状突起３２，４４をクッションゴム１８，２０の軸方向中央部に設けたことにより、クッションゴム１８，２０の上下いずれからの水の侵入に対しても、環状突起３２，４４でそれ以上の水の侵入を食い止めることができ、ピストンロッド１とクッションゴム１８，２０との間の水の侵入面積を小さくして、水が介在することによる性能低下を軽減することができる。   The annular protrusions 32 and 44 can prevent water from entering between the piston rod 1 and the cushion rubbers 18 and 20. In particular, since the annular protrusions 32 and 44 are provided in the central portions in the axial direction of the cushion rubbers 18 and 20, the annular protrusions 32 and 44 further increase the amount of water intrusion from above and below the cushion rubbers 18 and 20. Intrusion of water can be prevented, the area of water intrusion between the piston rod 1 and the cushion rubbers 18 and 20 can be reduced, and performance degradation due to the presence of water can be reduced.

更に、かかる環状突起３２，４４が、上側クッションゴム１８と下側クッションゴム２０のそれぞれに各１本のみ設けられているので、これらクッションゴム１８，２０の成形時に型抜きしやすく、成形性に優れる。   Furthermore, since only one annular protrusion 32, 44 is provided for each of the upper cushion rubber 18 and the lower cushion rubber 20, it is easy to remove the mold during molding of the cushion rubber 18, 20, thereby improving moldability. Excellent.

なお、上記実施形態では、上側クッションゴム１８の下面１８ｃから筒状ゴム部２８を突設したが、かかる筒状ゴム部２８は、図示しないが、下側クッションゴム１６の上面２０ｃに設けてもよい。また、その場合、上記保持部材３４を下側クッションゴム２０と車体側部材１２との間に設けて、その環状側壁部３８で下側クッションゴム２０の上部外周面２０ｄを保持するようにすればよい。   In the above embodiment, the cylindrical rubber portion 28 protrudes from the lower surface 18c of the upper cushion rubber 18. However, the cylindrical rubber portion 28 may be provided on the upper surface 20c of the lower cushion rubber 16 although not shown. Good. In this case, if the holding member 34 is provided between the lower cushion rubber 20 and the vehicle body side member 12, the upper outer peripheral surface 20 d of the lower cushion rubber 20 is held by the annular side wall 38. Good.

また、上記実施形態では、上下のクッションゴム１８，２０にピストンロッド１を直接嵌挿するように構成したが、図６に示した従来技術のようなスリーブをピストンロッドに外装して、該スリーブを介して上下のクッションゴム１８，２０を装着するようにしてもよい。   In the above embodiment, the piston rod 1 is directly fitted and inserted into the upper and lower cushion rubbers 18 and 20. However, a sleeve like the prior art shown in FIG. Alternatively, the upper and lower cushion rubbers 18 and 20 may be attached.

本発明は、主として自動車などの車両のサスペンション機構に用いることができる。   The present invention can be used mainly for a suspension mechanism of a vehicle such as an automobile.

本発明の一実施形態に係る防振装置の断面図Sectional drawing of the vibration isolator which concerns on one Embodiment of this invention 同防振装置の上側クッションゴムの断面図Sectional view of the upper cushion rubber of the vibration isolator 上側クッションゴムの底面図Bottom view of upper cushion rubber 上側クッションゴムと上側取付部材と保持部材との組み立て状態の断面図Sectional drawing of the assembly state of the upper cushion rubber, the upper mounting member, and the holding member 下側クッションゴムの断面図Cross section of lower cushion rubber 従来の防振装置の断面図Cross-sectional view of a conventional vibration isolator

符号の説明Explanation of symbols

１…ショックアブソーバのピストンロッド、１０…防振装置、１２…車体側部材（車体）、１３…開口部、１４…上側取付部材、１６…下側取付部材、１８…上側クッションゴム、１８ｃ…上側クッションゴムの下面、１８ｄ…上側クッションゴムの内周面、１８ｅ…上側クッションゴムの下部外周面、２０…下側クッションゴム、２０ｂ…下側のクッションゴムの内周面、２０ｃ…下側のクッションゴムの上面、２０ｄ…下側のクッションゴムの上部外周面、２８…筒状ゴム部、２８ａ…筒状ゴム部の根元部、３０…環状凹部、３２…環状突起、３４…保持部材、３６ａ…貫通孔、３６ｂ…貫通孔の開口縁部、３８…環状側壁部、４０…筒状延設部、４４…環状突起、Ｚ…上下方向、Ａ…軸方向、Ｃ…周方向、 DESCRIPTION OF SYMBOLS 1 ... Piston rod of shock absorber, 10 ... Vibration isolator, 12 ... Vehicle body side member (vehicle body), 13 ... Opening part, 14 ... Upper attachment member, 16 ... Lower attachment member, 18 ... Upper cushion rubber, 18c ... Upper side Lower surface of cushion rubber, 18d: inner peripheral surface of upper cushion rubber, 18e: lower outer peripheral surface of upper cushion rubber, 20 ... lower cushion rubber, 20b ... inner peripheral surface of lower cushion rubber, 20c: lower cushion Upper surface of rubber, 20d ... Upper outer peripheral surface of lower cushion rubber, 28 ... Cylindrical rubber portion, 28a ... Base portion of cylindrical rubber portion, 30 ... Annular recess, 32 ... Annular projection, 34 ... Holding member, 36a ... Through-hole, 36b ... Opening edge of through-hole, 38 ... annular side wall, 40 ... cylindrical extension, 44 ... annular projection, Z ... vertical direction, A ... axial direction, C ... circumferential direction,

Claims (4)

車両のサスペンション機構におけるショックアブソーバのピストンロッドを車体に対して弾性的に結合するための防振装置であって、
前記ピストンロッドが貫通する開口部を備える車体側部材と、前記車体側部材の上方に配され前記ピストンロッドに固定される上側取付部材と、前記車体側部材の下方に配され前記ピストンロッドに固定される下側取付部材と、前記ピストンロッドが貫通する環状をなして前記車体側部材と前記上側取付部材との間にて軸方向に圧縮された状態に配される上側クッションゴムと、前記ピストンロッドが貫通する環状をなして前記車体側部材と前記下側取付部材との間にて軸方向に圧縮された状態に配される下側クッションゴムとを備えてなる防振装置において、
前記上側クッションゴムの下面又は前記下側クッションゴムの上面に、軸方向に突出し前記車体側部材の前記開口部の内側において前記ピストンロッドの外周を取り囲む筒状ゴム部が一体に設けられるとともに、前記筒状ゴム部の根元部外周に軸方向に陥没した環状凹部が設けられたことを特徴とする防振装置。 A vibration isolator for elastically coupling a piston rod of a shock absorber in a vehicle suspension mechanism to a vehicle body,
A vehicle body side member having an opening through which the piston rod passes, an upper mounting member disposed above the vehicle body side member and fixed to the piston rod, and disposed below the vehicle body side member and fixed to the piston rod. An upper cushion rubber disposed in an axially compressed state between the vehicle body side member and the upper mounting member in an annular shape through which the piston rod passes, and the piston In a vibration isolator comprising a lower cushion rubber disposed in an axially compressed state between the vehicle body side member and the lower mounting member in an annular shape through which the rod passes,
A cylindrical rubber portion protruding in the axial direction and surrounding the outer periphery of the piston rod inside the opening of the vehicle body side member is integrally provided on the lower surface of the upper cushion rubber or the upper surface of the lower cushion rubber, and An anti-vibration device characterized in that an annular recess recessed in the axial direction is provided on an outer periphery of a base portion of a cylindrical rubber portion. 前記上側クッションゴムと前記車体側部材との間又は前記下側クッションゴムと前記車体側部材との間に、前記上側クッションゴムの下部外周面又は前記下側クッションゴムの上部外周面を保持する環状側壁部を備える保持部材が設けられ、前記保持部材は、前記ピストンロッドが貫通する貫通孔を備えるとともに、該貫通孔の開口縁部に前記車体側部材の開口部に内嵌する軸方向に延びる筒状延設部が設けられ、前記筒状ゴム部が前記筒状延設部の内側に嵌合状態に保持されたことを特徴とする請求項１記載の防振装置。   An annular shape that holds the lower outer peripheral surface of the upper cushion rubber or the upper outer peripheral surface of the lower cushion rubber between the upper cushion rubber and the vehicle body side member or between the lower cushion rubber and the vehicle body side member. A holding member having a side wall is provided, and the holding member has a through hole through which the piston rod penetrates, and extends in an axial direction in which the opening edge of the through hole fits in the opening of the vehicle body side member. 2. The vibration isolator according to claim 1, further comprising a cylindrical extension portion, wherein the cylindrical rubber portion is held in a fitted state inside the cylindrical extension portion. 前記上側クッションゴムの内周面における軸方向中央部に、周方向に延びる環状突起が設けられたことを特徴とする請求項１又は２記載の防振装置。   The vibration isolator according to claim 1 or 2, wherein an annular protrusion extending in the circumferential direction is provided at a central portion in an axial direction on an inner circumferential surface of the upper cushion rubber. 前記下側クッションゴムの内周面における軸方向中央部に、周方向に延びる環状突起が設けられたことを特徴とする請求項１〜３のいずれかに記載の防振装置。
The vibration isolator according to any one of claims 1 to 3, wherein an annular protrusion extending in the circumferential direction is provided at a central portion in an axial direction on an inner circumferential surface of the lower cushion rubber.
JP2005356770A 2005-12-09 2005-12-09 Vibration isolator Pending JP2007162752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005356770A JP2007162752A (en) 2005-12-09 2005-12-09 Vibration isolator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005356770A JP2007162752A (en) 2005-12-09 2005-12-09 Vibration isolator

Publications (1)

Publication Number Publication Date
JP2007162752A true JP2007162752A (en) 2007-06-28

Family

ID=38245898

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005356770A Pending JP2007162752A (en) 2005-12-09 2005-12-09 Vibration isolator

Country Status (1)

Country Link
JP (1) JP2007162752A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010060024A (en) * 2008-09-02 2010-03-18 Toyo Tire & Rubber Co Ltd Vibration damping device
JP2011140289A (en) * 2010-01-08 2011-07-21 Mitsubishi Motors Corp Stabilizer bush device
US8668213B2 (en) 2010-09-14 2014-03-11 Honda Motor Co., Ltd. Damper mounting structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000199537A (en) * 1999-01-07 2000-07-18 Tokai Rubber Ind Ltd Cushion rubber for absorber
JP2002081502A (en) * 2000-09-08 2002-03-22 Tokai Rubber Ind Ltd Tubular vibration control device
JP2003226126A (en) * 2002-02-06 2003-08-12 Tokai Rubber Ind Ltd Suspension mechanism for automobile
JP2005233207A (en) * 2004-02-17 2005-09-02 Kayaba Ind Co Ltd Rubber bush

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000199537A (en) * 1999-01-07 2000-07-18 Tokai Rubber Ind Ltd Cushion rubber for absorber
JP2002081502A (en) * 2000-09-08 2002-03-22 Tokai Rubber Ind Ltd Tubular vibration control device
JP2003226126A (en) * 2002-02-06 2003-08-12 Tokai Rubber Ind Ltd Suspension mechanism for automobile
JP2005233207A (en) * 2004-02-17 2005-09-02 Kayaba Ind Co Ltd Rubber bush

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010060024A (en) * 2008-09-02 2010-03-18 Toyo Tire & Rubber Co Ltd Vibration damping device
JP4716388B2 (en) * 2008-09-02 2011-07-06 東洋ゴム工業株式会社 Vibration isolator
JP2011140289A (en) * 2010-01-08 2011-07-21 Mitsubishi Motors Corp Stabilizer bush device
US8668213B2 (en) 2010-09-14 2014-03-11 Honda Motor Co., Ltd. Damper mounting structure
JP5521048B2 (en) * 2010-09-14 2014-06-11 本田技研工業株式会社 Damper mount structure

Similar Documents

Publication Publication Date Title
JP2007162752A (en) Vibration isolator
JP2005140247A (en) Vibration control device
JP2007132386A (en) Vibration control device
JP2009085261A (en) Vibration isolation bushing
KR101488645B1 (en) Hanger of exhaust pipe
JP2008051193A (en) Strut mount
JP2008291973A (en) Vibration-proofing device
JP4963401B2 (en) Strut mount
JP2006220261A (en) Vibration control rubber
JP2007211904A (en) Vibration control device
JP2007263148A (en) Member mount and its manufacturing method
KR20110046386A (en) Self Restrained Dynamic Damper
JP2007239916A (en) Strut mount
JP2009196574A (en) Suspension upper support and vehicle suspension mechanism using the same
WO2023218716A1 (en) Vibration control device and method for manufacturing vibration control device
JP2007263196A (en) Vibration absorbing supporting device
JP2011094646A (en) Mounting cap and mounting structure therefor
JP2009144845A (en) Vibration control device
JP3153022B2 (en) Assembly structure of bumper bound and dust cover
KR100776218B1 (en) Sealing structure for use in a shock absorber
JP3937352B2 (en) Vibration isolator
JP5829239B2 (en) Vibration isolator
JP4716388B2 (en) Vibration isolator
JP2594796Y2 (en) Strut mount
JP2008151177A (en) Strut mount

Legal Events

Date Code Title Description
A621 Written request for application examination

Effective date: 20080911

Free format text: JAPANESE INTERMEDIATE CODE: A621

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100730

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101221

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20110426