JP2006258209A - Air spring - Google Patents

Air spring Download PDF

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Publication number
JP2006258209A
JP2006258209A JP2005077476A JP2005077476A JP2006258209A JP 2006258209 A JP2006258209 A JP 2006258209A JP 2005077476 A JP2005077476 A JP 2005077476A JP 2005077476 A JP2005077476 A JP 2005077476A JP 2006258209 A JP2006258209 A JP 2006258209A
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JP
Japan
Prior art keywords
piston
air spring
spring seat
spring
flange
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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
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JP2005077476A
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Japanese (ja)
Inventor
Norikatsu Namito
則克 波戸
Yukihiko Takemi
幸彦 竹味
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.)
Bridgestone Corp
Aisin Corp
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Aisin Seiki Co Ltd
Bridgestone Corp
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.)
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Publication date
Application filed by Aisin Seiki Co Ltd, Bridgestone Corp filed Critical Aisin Seiki Co Ltd
Priority to JP2005077476A priority Critical patent/JP2006258209A/en
Publication of JP2006258209A publication Critical patent/JP2006258209A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/28—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs

Abstract

<P>PROBLEM TO BE SOLVED: To simply and easily dispose an air spring to a desired position as expected by sufficiently eliminating risk of coming of a piston of the air spring off a spring seat while eliminating fixture of the piston to the spring seat, and use a single spring seat commonly for the air spring and a coil spring. <P>SOLUTION: This air spring is provided with a chamber 1 and the piston 2 formed of hard material, and disposed to face each other in a vertical attitude, and a cylindrical flexible film member 3 of which end parts are respectively connected to the chamber 1 and the piston 2, with a middle part overturned, to be tightly connected at the respective end parts. At a lower end part of the piston 2, engagement recesses 7 and 10 are provided to be engaged with a protrusion 6a formed on the spring seat. Flange-shaped plate parts 8 and 11 are provided to get in surface-contact with a flat surface 6b of the spring seat 6 around the engagement recesses 7 and 10. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は空気ばねに関するものであり、とくには、空気ばねのピストンを、ボルト等の固定具なしにスプリングシート上に配設可能としたものである。   The present invention relates to an air spring, and in particular, a piston of an air spring can be disposed on a spring seat without a fixing tool such as a bolt.

従来から使用されている空気ばねとしては、たとえば図５に例示するように、ともに剛性材料からなり、上下に間隔をおいて位置するチャンバ３１およびピストン３２のそれぞれに、たとえば繊維補強ゴム材料からなる筒状可撓膜体３３の両端部分を、中間部での内外反転姿勢で気密に連結することで内部に圧力室３４を区画し、そして、その圧力室３４への加圧気体、たとえば加圧空気の給排を司る給排口３５を、チャンバ３１に設けたものがある。   As an air spring conventionally used, for example, as illustrated in FIG. 5, both are made of a rigid material, and each of the chamber 31 and the piston 32 that are positioned at an interval in the vertical direction is made of, for example, a fiber-reinforced rubber material. A pressure chamber 34 is defined inside by connecting both end portions of the cylindrical flexible film body 33 in an airtight manner in an inside-outside inverted posture at an intermediate portion, and a pressurized gas to the pressure chamber 34, for example, pressurized Some chambers 31 are provided with a supply / discharge port 35 for controlling supply and discharge of air.

ところで、このような空気ばねは、チャンバ３１、ピストン３２および筒状可撓膜体３３のそれぞれの中心軸線が上下方向に整列した姿勢で伸縮変位する場合の他、図示のように、チャンバ３１の中心軸線とピストン３２の中心軸線とが、共通の垂直面内で相対的に傾斜した姿勢で機能する場合もある。   By the way, such an air spring is not limited to the case where the central axes of the chamber 31, the piston 32 and the cylindrical flexible film body 33 are extended and contracted in a posture aligned in the vertical direction. In some cases, the central axis and the central axis of the piston 32 function in a relatively inclined posture within a common vertical plane.

そして、この後者の場合、すなわち、空気ばねが曲がり変形した場合には、ピストン３２と筒状可撓膜体３３との接触面積が、図では左右のそれぞれの側部でのそれらの両者の接触域の投影図３６、３７で示すように、曲がりの内側で大きく、外側で小さくなることに起因して、ピストン３２に、曲がりの内側から外側に向く横力Ｆが作用することになるので、このような横力Ｆの作用に対して、空気ばねの、スプリングシート３８からの脱落等を防止するために、ピストン３２を、ボルト・ナット３９等によってそのスプリングシート３８に固定することが必要であった。   In this latter case, that is, when the air spring is bent and deformed, the contact area between the piston 32 and the cylindrical flexible film body 33 is the contact between them on the left and right sides in the figure. As shown in the projections 36 and 37 of the area, the lateral force F acting on the piston 32 from the inside to the outside acts on the piston 32 due to being large on the inside of the bend and small on the outside. In order to prevent the air spring from falling off the spring seat 38 against the action of the lateral force F, it is necessary to fix the piston 32 to the spring seat 38 with a bolt / nut 39 or the like. there were.

しかるに、この従来技術によれば、ピストン３２をスプリングシート３８に固定するための特別の固定具および、それの取付け作業工数が必須になるという問題があった。 However, according to this prior art, there is a problem that a special fixing tool for fixing the piston 32 to the spring seat 38 and the man-hour for mounting the same are indispensable.

この発明は、従来技術が抱えるこのような問題点を解決することを課題とするものであり、それの目的とするところは、上述したような横力Ｆの作用に対して、空気ばねのスプリングシートへの固定を不要としてなお、ピストンの、スプリングシートからの脱落等のおそれを十分に取り除くことで、空気ばねの、所定位置への、所期した通りの配設を簡単かつ容易にした空気ばねを提供するにある。   The object of the present invention is to solve such problems of the prior art, and the object of the invention is to provide a spring for an air spring against the action of the lateral force F as described above. Air that makes it easy and easy to place the air spring in place as expected, by eliminating the possibility of the piston falling off the spring seat, etc. It is in providing a spring.

この発明の空気ばねは、剛性材料にて構成されて、上下の対向姿勢で配設されるチャンバおよびピストンのそれぞれに、中間部で内外反転姿勢とした、たとえば繊維補強ゴム材料からなる筒状可撓膜体のそれぞれの端部分を気密に連結したところにおいて、ピストンの下端部に、スプリングシートに形成された突部に嵌まり合う嵌合凹部を設けるとともに、その嵌合凹部の周りで、スプリングシートの平坦面に面接触するフランジ状平板部を設けたものである。
ここで、嵌合凹部およびフランジ状平板部のそれぞれは、ピストンの本体部に付設することの他、それに一体形成することもできる。 The air spring according to the present invention is made of a rigid material, and is formed in a cylindrical shape made of, for example, a fiber-reinforced rubber material, in a chamber and a piston arranged in an up / down facing posture and in an inward / outside turning posture at an intermediate portion. When the respective end portions of the flexure body are hermetically connected, a fitting recess that fits into the protrusion formed on the spring seat is provided at the lower end of the piston, and the spring around the fitting recess is provided. A flange-shaped flat plate portion that is in surface contact with the flat surface of the sheet is provided.
Here, each of the fitting concave portion and the flange-like flat plate portion can be integrally formed with the piston in addition to being attached to the main body portion of the piston.

この空気ばねでは、ピストンの嵌合凹部を、スプリングシートの突部に嵌め合わせるとともに、フランジ状平板部をその突部の周りでスプリングシートの平坦面に着座させるだけで、特別の固定具等を用いることなしに、空気ばねを所定の位置に所期した通りに、簡易・迅速に配設することができる。   In this air spring, the fitting concave portion of the piston is fitted to the protrusion of the spring seat, and the flange-like flat plate portion is seated on the flat surface of the spring seat around the protrusion, so that a special fixture or the like can be provided. Without use, the air spring can be simply and quickly arranged as expected at a predetermined position.

そして、空気ばねのこのような配設状態にあっては、チャンバの中心軸線と、ピストンの中心軸線とが、垂直面内で相対的に傾斜する、空気ばねの曲がり変形が生じて、ピストンが、曲がりの内側から外側に向く横力を受けることがあっても、そのピストンは、嵌合凹部によってスプリングシートの突部に掛合することで、ピストンが、スプリングシートに対して、横力の作用方向に変位するのを有効に阻止することができ、しかも、そのピストンは、フランジ状平板部をもって、スプリングシートの平坦面に、所要の領域にわたって面接触することから、ピストンが、横力の作用の下で、支点の周りに回動変位するのを、フランジ状平板部による、十分な長さのモーメントアームの確保によって効果的に防止することができる。   In such an arrangement state of the air spring, the central axis of the chamber and the central axis of the piston are relatively inclined in the vertical plane, and the air spring is bent and deformed. Even if it receives a lateral force from the inside to the outside of the bend, the piston engages with the protrusion of the spring seat by the fitting recess, so that the piston acts on the spring seat. The piston can be effectively prevented from being displaced in the direction, and the piston has a flange-like flat plate portion and is in surface contact with the flat surface of the spring seat over a required area. Rotation displacement around the fulcrum can be effectively prevented by securing a sufficiently long moment arm by the flange-like flat plate portion.

従ってここでは、ボルト・ナット等の固定手段をもって、ピストンをスプリングシートに固定する必要なしに、ピストンの、スプリングシートからの脱落、それに対する相対変位等のおそれを十分に取り除くことができる。   Therefore, here, there is no need to fix the piston to the spring seat with fixing means such as bolts and nuts, and the risk of the piston falling off from the spring seat and relative displacement with respect to it can be sufficiently eliminated.

図１はこの発明に係る空気ばねの実施形態を、スプリングシートとともに示す縦断面図である。
図中１，２はそれぞれ、ともに剛性材料にて構成されて上下に間隔をおいて位置するチャンバおよびピストンを示し、３は筒状可撓膜体を示す。
たとえば、コード補強層を埋設してなるゴム膜によって構成することができる筒状可撓膜体３は、中間部での内外反転姿勢で、それぞれの端部分を、チャンバ１の外周面および、ピストン２の上端部外周面のそれぞれに、たとえば金属リングのかしめ固定によってともに気密に連結することで、チャンバ１およびピストン２とともに圧力室４を区画するべく機能し、このような圧力室４に対する、所要の圧力の加圧気体の給排は、チャンバ１に設けた気体給排口５を経て行うことができる。 FIG. 1 is a longitudinal sectional view showing an embodiment of an air spring according to the present invention together with a spring seat.
In the figure, reference numerals 1 and 2 denote chambers and pistons which are both made of a rigid material and are spaced apart from each other, and 3 denotes a cylindrical flexible film body.
For example, the cylindrical flexible film body 3 that can be constituted by a rubber film in which a cord reinforcing layer is embedded has an inverted inside / outside posture at the intermediate portion, and each end portion is connected to the outer peripheral surface of the chamber 1 and the piston. 2 is connected to each of the outer peripheral surfaces of the upper end portion 2 in an airtight manner, for example, by caulking and fixing a metal ring, thereby functioning to partition the pressure chamber 4 together with the chamber 1 and the piston 2. The supply and discharge of the pressurized gas at the pressure of 2 can be performed through the gas supply and discharge port 5 provided in the chamber 1.

ここで、図１（ａ）に示す空気ばねは、底壁付きのピストン本体部２ａのその底壁２ｂの下面に、スプリングシート６に設けた上向きの突部６ａに嵌まり合う、好ましくは丁度嵌合する嵌合凹部７と、この嵌合凹部７の周りで、スプリングシート６の平坦面６ｂに面接触するフランジ状平板部８とを具える掛合部材９を、嵌合凹部部分で、溶接接合その他によって固着もしくは固定することによって構成してなるものである。   Here, the air spring shown in FIG. 1 (a) fits on the lower surface of the bottom wall 2b of the piston main body 2a with the bottom wall, and preferably fits the upward protrusion 6a provided on the spring seat 6. A hooking member 9 comprising a fitting recess 7 to be fitted and a flange-shaped flat plate portion 8 in surface contact with the flat surface 6b of the spring seat 6 around the fitting recess 7 is welded at the fitting recess portion. It is configured by being fixed or fixed by joining or the like.

また、図１（ｂ）に示す空気ばねは、頂壁２ｃを設けたピストン本体部２ａの下端部分に、スプリングシート６の突部６ａに嵌まり合って、その突部６ａの周面に接触する嵌合凹部１０を一体形成するとともに、スプリングシート６の平坦面６ｂに面接触するフランジ状平板部１１を、その嵌合凹部１０に連続させて形成することによって構成してなるものである。   In addition, the air spring shown in FIG. 1 (b) is fitted to the protrusion 6a of the spring seat 6 at the lower end portion of the piston body 2a provided with the top wall 2c, and contacts the peripheral surface of the protrusion 6a. The fitting concave portion 10 is integrally formed, and the flange-shaped flat plate portion 11 that is in surface contact with the flat surface 6 b of the spring seat 6 is formed continuously with the fitting concave portion 10.

これらの空気ばねはいずれも、図に示すところから明らかなように、嵌合凹部７，１０およびフランジ状平板部８，１１のそれぞれを、スプリングシート６の突部６ａおよび平坦面６ｂのそれぞれに掛合させるだけで、空気ばねを、スプリングシート６上に所期した通りに配設することができるので、空気ばねの所要の着座配設を、特別の固定具等を用いることなく、簡易・迅速に行うことができる。   As is apparent from the drawing, these air springs are respectively provided with the fitting recesses 7 and 10 and the flange-like flat plate portions 8 and 11 on the protrusion 6a and the flat surface 6b of the spring seat 6, respectively. Since the air spring can be arranged on the spring seat 6 just as it is engaged, the required seating arrangement of the air spring can be easily and quickly performed without using a special fixture or the like. Can be done.

ところで、それぞれの空気ばねのピストン、なかでもフランジ状平板部８，１１の底面形状は、図２（ａ），（ｂ）に示すように、ともに円形の内外輪郭形状を有する円環形状とすることができる他、図３（ａ），（ｂ）に示すように、空気ばねが曲がり変形することのない方向に対しては、図２に示すものに比して、平板部８，１１の張り出し量を低減させた扁平な外輪郭形状を有するものとすることもでき、図３（ｃ）に示すような異形形状とすることもできる。
従って、図３に示す場合には、空気ばねの設置スペースの低減を図ることもできる。 By the way, as shown in FIGS. 2 (a) and 2 (b), the bottom surfaces of the pistons of the air springs, especially the flange-like flat plate portions 8 and 11, are both annular shapes having circular inner and outer contour shapes. In addition, as shown in FIGS. 3 (a) and 3 (b), the flat plate portions 8 and 11 can be formed in a direction in which the air spring does not bend and deform as compared with that shown in FIG. It may have a flat outer contour shape with a reduced amount of overhang, or may have an irregular shape as shown in FIG.
Therefore, in the case shown in FIG. 3, the installation space of the air spring can be reduced.

以上に述べたように構成して、スプリングシート６上に上述したようにして配設したそれぞれの空気ばねが、図４に例示するような曲げ変形を受けた場合は、曲げの内側から外側に向く方向の横力Ｆの作用に対したは、スプリングシート６の突部６ａに嵌合する嵌合凹部７，１０は、ピストン２、ひいては、空気ばねの、スプリングシート６に対する相対変位を十分に拘束するべく機能し、また、スプリングシート６の平坦面６ｂに面接触するフランジ状平板部８，１１は、その嵌合の解除を有効に阻止するべく機能することになるので、そのピストン２をスプリングシート６に固定等するまでもなく、ピストン２の不測の相対変位を十分に防止することができる。   When each of the air springs configured as described above and disposed on the spring seat 6 as described above undergoes bending deformation as illustrated in FIG. The fitting recesses 7 and 10 fitted to the protrusions 6a of the spring seat 6 can sufficiently move the piston 2 and consequently the air spring relative to the spring seat 6 against the action of the lateral force F in the direction to face. The flange-like flat plate portions 8 and 11 that function to restrain and make surface contact with the flat surface 6b of the spring seat 6 function to effectively prevent the release of the fitting. Needless to say, it is not fixed to the spring seat 6, and the unexpected relative displacement of the piston 2 can be sufficiently prevented.

この発明の実施の形態を示す縦断面図である。It is a longitudinal section showing an embodiment of this invention. ピストンの底面図である。It is a bottom view of a piston. フランジ状平板部の輪郭形状の変更例を示す底面図である。It is a bottom view which shows the example of a change of the outline shape of a flange-shaped flat plate part. 空気ばねの曲がり変形状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the bending deformation state of an air spring. 従来の空気ばねを曲がり変形状態で示す縦断面図である。It is a longitudinal cross-sectional view which shows the conventional air spring in the bending deformation state.

符号の説明Explanation of symbols

１ チャンバ
２ ピストン
２ａ ピストン本体部
２ｂ 底壁
２ａ 頂壁
３ 筒状可撓膜体
４ 圧力室
５ 気体給排口
６ スプリングシート
６ａ 突部
６ｂ 平坦部
７，１０ 嵌合凹部
８，１１ フランジ状平板部
９ 掛合部材 DESCRIPTION OF SYMBOLS 1 Chamber 2 Piston 2a Piston main-body part 2b Bottom wall 2a Top wall 3 Tubular flexible film body 4 Pressure chamber 5 Gas supply / exhaust port 6 Spring sheet 6a Protrusion part 6b Flat part 7,10 Fitting recessed part 8,11 Flange-shaped flat plate Part 9 Hanging member

Claims (3)

剛性材料からなり、上下の対向姿勢で配設されるチャンバおよびピストンと、これらのチャンバおよびピストンのそれぞれに、中間部での内外反転姿勢でそれぞれの端部分を気密に連結した筒状可撓膜体とを具える空気ばねであって、
前記ピストンの下端部に、スプリングシートに形成された突部に嵌まり合う嵌合凹部を設けるとともに、その嵌合凹部の周りで、スプリングシートの平坦面に面接触するフランジ状平板部を設けてなる空気ばね。 A chamber and a piston made of a rigid material and arranged in a vertically opposed posture, and a cylindrical flexible membrane in which each end portion is airtightly connected to each of the chamber and the piston in an inside / outside inverted posture at an intermediate portion An air spring with a body,
The lower end portion of the piston is provided with a fitting recess that fits into a protrusion formed on the spring seat, and a flange-like flat plate portion that is in surface contact with the flat surface of the spring seat is provided around the fitting recess. Become an air spring. 前記嵌合凹部およびフランジ状平板部のそれぞれをピストンの本体部に付設してなる請求項１に記載の空気ばね。   The air spring according to claim 1, wherein each of the fitting concave portion and the flange-like flat plate portion is attached to a main body portion of the piston. 前記嵌合凹部およびフランジ状平板部のそれぞれをピストンの本体部に一体形成してなる請求項１に記載の空気ばね。   The air spring according to claim 1, wherein each of the fitting concave portion and the flange-like flat plate portion is integrally formed with a main body portion of the piston.
JP2005077476A 2005-03-17 2005-03-17 Air spring Pending JP2006258209A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571843A (en) * 1980-06-04 1982-01-07 Hitachi Ltd Air spring
JPS5716040U (en) * 1980-06-30 1982-01-27
JPS59199363A (en) * 1983-04-22 1984-11-12 川崎重工業株式会社 Air spring
JPH10238575A (en) * 1997-02-27 1998-09-08 Unie Press Kk Insulator bracket structure for mount insulator
JP2005106088A (en) * 2003-09-29 2005-04-21 Press Kogyo Co Ltd Vehicular air spring structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS571843A (en) * 1980-06-04 1982-01-07 Hitachi Ltd Air spring
JPS5716040U (en) * 1980-06-30 1982-01-27
JPS59199363A (en) * 1983-04-22 1984-11-12 川崎重工業株式会社 Air spring
JPH10238575A (en) * 1997-02-27 1998-09-08 Unie Press Kk Insulator bracket structure for mount insulator
JP2005106088A (en) * 2003-09-29 2005-04-21 Press Kogyo Co Ltd Vehicular air spring structure

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