JP2010281433A - Air spring and air spring structure - Google Patents

Air spring and air spring structure Download PDF

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JP2010281433A
JP2010281433A JP2009137489A JP2009137489A JP2010281433A JP 2010281433 A JP2010281433 A JP 2010281433A JP 2009137489 A JP2009137489 A JP 2009137489A JP 2009137489 A JP2009137489 A JP 2009137489A JP 2010281433 A JP2010281433 A JP 2010281433A
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piston
air spring
rubber film
cylindrical rubber
axial direction
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JP5277080B2 (en
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Yoichi Kakiuchi
洋一 垣内
Hiroyuki Maemura
博之 前村
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air spring incorporated at a regular position and modified to prevent a trouble of twist of a tubular rubber film during piston fixing operation while employing a structure attaching a piston on a support member (unsprung part) thereof by a bolt disposed on an axial center. <P>SOLUTION: This air spring includes the tubular rubber film 1, a large diameter plate shape member 2 airtightly joined to one end part in an axial center P direction, and the piston 3 airtightly joined to another end part in the axial center P direction of the tubular rubber film 1, and has a circumference surface 7 which can roll and guide an inside out tube part 1C formed by turning back another end parts side with elastic deformation of the tubular rubber film 1 formed on the piston 3. The piston 3 is equipped with a rotation prevention mechanism B preventing rotation around the axial center P relatively to a piston support member f supporting the same. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、トラック自動車や鉄道車両等に用いられる空気ばねに係り、詳しくは、ピストンの組付性が改善される空気ばね、或いは空気ばね構造に関するものである。   The present invention relates to an air spring used for truck cars, railway vehicles, and the like, and more particularly to an air spring or an air spring structure in which the assembly of a piston is improved.

従来、空気ばねは、筒状ゴム膜と、これの軸心方向の一端部に気密接合される大径板状部材と、筒状ゴム膜の軸心方向の他端部に気密接合されるピストンとを有し、筒状ゴム膜の弾性変形に伴ってその他端部側が折り返されて成る裏返し筒部分を転動案内可能な周面がピストンに形成される、という具合に構成されている。このような従来技術としては、特許文献1や特許文献2において開示されたものが知られている。   Conventionally, an air spring has a cylindrical rubber membrane, a large-diameter plate-like member that is airtightly joined to one end portion in the axial direction of the cylindrical rubber membrane, and a piston that is airtightly joined to the other end portion in the axial direction of the cylindrical rubber membrane. And a peripheral surface capable of rolling and guiding an inverted cylindrical portion formed by folding the other end side with the elastic deformation of the cylindrical rubber film is formed on the piston. As such conventional techniques, those disclosed in Patent Document 1 and Patent Document 2 are known.

空気ばねを自動車等の実際の設置箇所に組付けて空気ばね構造とするには、大径板状部材が車体フレーム等のばね上部に取付けられ、ピストンが車軸を支える懸架アーム等のばね下部に取付けられるようになる。この場合、大径板状部材は、そこに固着されるブラケットを介しての複数のボルト止めによって位置決め状態でばね上部に取付けられる。これに対して、ピストンは、その中心(軸心)に沿って一体的に装備されるボルト、又はナットを設けて、1組のボルト・ナットによってばね下部に取付ける構造とされている。   In order to assemble an air spring to an actual installation location of an automobile or the like to make an air spring structure, a large-diameter plate-like member is attached to the upper part of a spring such as a body frame, and the piston is attached to the lower part of a spring such as a suspension arm that supports an axle. Comes to be installed. In this case, the large-diameter plate-like member is attached to the upper part of the spring in a positioning state by a plurality of bolts through a bracket fixed thereto. On the other hand, the piston is provided with a bolt or a nut that is integrally provided along the center (axial center) thereof, and is attached to the lower part of the spring by a set of bolts and nuts.

故に、ピストンをばね下部に組付けるべく締結する場合、ピストンを片手で支えながらもう片方の手でボルト操作することになるが、往々にして締付トルクによってピストンが回動移動してしまうことがある。大きく回動移動すると筒状ゴム膜が大きく捩られてしまうので、見た目にすぐその不具合が分かり、再組付け操作が余儀なくされる。従って、余計な工数が発生するおそれがある、という問題があった。   Therefore, when the piston is fastened to be attached to the lower part of the spring, the piston is operated with the other hand while the piston is supported with the other hand, but the piston is often rotated by the tightening torque. is there. Since the cylindrical rubber film is greatly twisted when it is pivoted to a large extent, the problem can be immediately recognized and the reassembly operation is forced. Accordingly, there is a problem that extra man-hours may occur.

また、少しピストンが正規の位置から回動移動して筒状ゴム膜が多少捩られたままの状態で組み付けられてしまうこともあるが、その場合には、捩れの影響により、早期のボルト弛みや筒状ゴム膜の早期破損等、品質が低下し易くなるという問題がある。従って、ピストンを中心1本のボルトで取付ける手段は改善の余地が残されているものであった。   In addition, the piston may turn slightly from its normal position and the cylindrical rubber film may be assembled in a slightly twisted state. In addition, there is a problem that the quality is likely to be deteriorated, such as early breakage of the cylindrical rubber film. Therefore, the means for attaching the piston with one bolt at the center has left room for improvement.

特開2007−321936号公報JP 2007-321936 A 特開2007−051745号公報JP 2007-051745 A

本発明の目的は、軸心に配される1本のボルトでピストンをその支持部材(ばね下部)に取付ける構造としながらも正規の位置に組付けできて、ピストン固定操作時に筒状ゴム膜が捩れる不都合が生じないように改善される空気ばね、並びに空気ばね構造を提供する点にある。   The object of the present invention is to attach the piston to its support member (unsprung part) with a single bolt arranged on the shaft center, but to assemble it at a regular position. An object of the present invention is to provide an air spring and an air spring structure which are improved so as not to cause a twisting disadvantage.

請求項1に係る発明は、筒状ゴム膜1と、これの軸心P方向の一端部に気密接合される大径板状部材2と、前記筒状ゴム膜1の軸心P方向の他端部に気密接合されるピストン3とを有し、前記筒状ゴム膜1の弾性変形に伴って前記他端部側が折り返されて成る裏返し筒部分1Cを転動案内可能な周面7が前記ピストン3に形成されている空気ばねにおいて、
前記ピストン3に、これを支持するピストン支持部材fとの前記軸心P回りの相対回動を阻止する回り止め機構Bが装備されていることを特徴とするものである。
The invention according to claim 1 includes a cylindrical rubber film 1, a large-diameter plate-like member 2 hermetically joined to one end in the axial center P direction of the cylindrical rubber film 1, and the axial center P direction of the cylindrical rubber film 1. A peripheral surface 7 having a piston 3 hermetically joined to an end portion and capable of rolling and guiding a reverse cylinder portion 1C formed by folding the other end side with elastic deformation of the cylindrical rubber film 1; In the air spring formed on the piston 3,
The piston 3 is equipped with a detent mechanism B that prevents relative rotation around the axis P with the piston support member f that supports the piston 3.

請求項2に係る発明は、請求項1に記載の空気ばねにおいて、前記回り止め機構Bが、前記ピストン支持部材fに設けられて前記軸心P方向に突出する突起部13を内嵌可能な係合穴11、又は前記ピストン支持部材fに設けられて前記軸心P方向に凹む係合穴14に内嵌可能な突起部15を有して構成されていることを特徴とするものである。   According to a second aspect of the present invention, in the air spring according to the first aspect, the anti-rotation mechanism B can be internally fitted with a protrusion 13 provided on the piston support member f and projecting in the direction of the axis P. It is characterized by having a protrusion 15 that can be fitted in the engagement hole 11 or the engagement hole 14 provided in the piston support member f and recessed in the direction of the axis P. .

請求項3に係る発明は、請求項1に記載の空気ばねにおいて、前記ピストン3が合成樹脂製であるとともに、前記回り止め機構Bが、前記ピストン支持部材fに設けられて前記軸心P方向に突出する突起部13を内嵌可能であり、かつ、内周が硬質材による筒部材16で補強されている係合穴11によって構成されていることを特徴とするものである。   According to a third aspect of the present invention, in the air spring according to the first aspect, the piston 3 is made of synthetic resin, and the anti-rotation mechanism B is provided in the piston support member f so as to be in the direction of the axis P. It is characterized in that the projecting portion 13 projecting into the inside can be fitted inside, and the inner circumference is constituted by the engaging hole 11 reinforced by the cylindrical member 16 made of a hard material.

請求項4に係る発明は、筒状ゴム膜1と、これの軸心P方向の一端部に気密接合されてばね上部Fに被支持可能な大径板状部材2と、前記筒状ゴム膜1の軸心P方向の他端部に気密接合されてばね下部fに被支持可能なピストン3とを有し、前記筒状ゴム膜1の弾性変形に伴って前記他端部側が折り返されて成る裏返し筒部分1Cを転動案内可能な周面7が前記ピストン3に形成されている空気ばね構造において、
前記ピストン3と前記ばね下部fとの前記軸心P周りの相対回動移動を阻止する回り止め手段Dが構成されていることを特徴とするものである。
The invention according to claim 4 includes a cylindrical rubber film 1, a large-diameter plate-like member 2 that is hermetically joined to one end portion in the direction of the axis P of the cylindrical rubber film 1 and can be supported by the spring top F, and the cylindrical rubber film. A piston 3 that is hermetically joined to the other end portion in the direction of the axis P of 1 and can be supported by the unsprung portion f, and the other end portion is folded back as the cylindrical rubber film 1 is elastically deformed. In the air spring structure in which the piston 3 has a peripheral surface 7 capable of rolling and guiding the inverted tube portion 1C,
An anti-rotation means D is provided for preventing relative rotational movement of the piston 3 and the unsprung part f around the axis P.

請求項5に係る発明は、請求項4に記載の空気ばね構造において、前記回り止め手段Dが、前記ピストン3と前記ばね下部fとの何れか一方に設けられて前記軸心P方向に突出する突起部tと、前記ピストン3と前記ばね下部fとの何れか他方に設けられて前記突起部tを内嵌可能な係合穴hとから構成されていることを特徴とするものである。   According to a fifth aspect of the present invention, in the air spring structure according to the fourth aspect, the anti-rotation means D is provided on either the piston 3 or the spring lower portion f and protrudes in the direction of the axis P. And a engaging hole h that is provided on any one of the piston 3 and the unsprung portion f and can be fitted in the protruding portion t. .

請求項1の発明によれば、ピストンとピストン支持部材との軸心回りの相対回動を阻止する回り止め機構が装備されているので、ボルトを締付方向に回し操作した際のピストンの連れ回りが生じないようになる。故に、筒状ゴム膜が大きく捩られてしまって再組付け操作が余儀なくされ、余計な工数が掛かるとか、筒状ゴム膜が多少捩られたまま組み付けられて、早期ボルト弛みや筒状ゴム膜の早期破損等、品質が低下し易くなるといった問題が解消される。その結果、軸心に配される1本のボルトでピストンをその支持部材(ばね下部)に取付ける構造としながらも正規の位置に組付けできて、ピストン固定操作時に筒状ゴム膜が捩れる不都合が生じないように改善される空気ばねを提供することができる。   According to the first aspect of the present invention, the rotation prevention mechanism that prevents the relative rotation around the axis between the piston and the piston support member is provided, so that the piston is moved when the bolt is turned in the tightening direction. No turning around. Therefore, the cylindrical rubber film is greatly twisted and reassembly operation is forced, and it takes extra man-hours, or the cylindrical rubber film is assembled while being slightly twisted, and early bolt loosening or cylindrical rubber film The problem that the quality is likely to be degraded, such as early breakage, is solved. As a result, it is possible to assemble the piston to the support member (unsprung portion) with a single bolt arranged on the shaft center, but to assemble the piston rubber in a proper position, and the cylindrical rubber film is twisted during the piston fixing operation. It is possible to provide an air spring that is improved so as not to occur.

請求項2の発明によれば、ピストンに装備される回り止め機構が、突起部を内嵌可能な係合穴、又は係合穴に内嵌可能な突起部という簡単で廉価な構造で構成できる利点がある。   According to the invention of claim 2, the detent mechanism provided on the piston can be configured with a simple and inexpensive structure of an engagement hole in which the protrusion can be fitted, or a protrusion that can be fitted in the engagement hole. There are advantages.

請求項3の発明によれば、係合穴が硬質材製の筒部材で補強されるので、ピストンを合成樹脂製としても係合穴に圧潰等の損傷が生じることなく強度十分に構成でき、軽量で廉価なものとしながら請求項1や2の発明による前記効果を奏することができる、という利点がある。   According to the invention of claim 3, since the engagement hole is reinforced by the cylindrical member made of a hard material, even if the piston is made of synthetic resin, the engagement hole can be sufficiently configured without causing damage such as crushing, There exists an advantage that the said effect by invention of Claim 1 or 2 can be show | played, making it lightweight and cheap.

請求項4の発明によれば、請求項1の発明による効果と同等の効果を発揮することが可能な空気ばね構造を提供することができ、請求項5の発明によれば、請求項2の発明による効果と同等の効果を発揮することが可能な空気ばね構造を提供することができる。   According to the invention of claim 4, it is possible to provide an air spring structure capable of exhibiting the same effect as that of the invention of claim 1, and according to the invention of claim 5, An air spring structure capable of exhibiting an effect equivalent to the effect of the invention can be provided.

空気ばねの構造を示す断面図(実施例1)Sectional view showing structure of air spring (Example 1) ピストンの底面図Bottom view of piston 回り止め機構の構造を示す要部の拡大断面図Enlarged sectional view of the main part showing the structure of the detent mechanism 空気ばねの使用例(空気ばね構造)を示す正面図Front view showing an example of air spring use (air spring structure) 実施例2の回り止め機構等を示す要部の拡大断面図The expanded sectional view of the principal part which shows the rotation prevention mechanism etc. of Example 2. 実施例3の回り止め機構等を示す要部の拡大断面図The expanded sectional view of the principal part which shows the detent mechanism etc. of Example 3. 実施例4の回り止め機構等を示す要部の拡大断面図The expanded sectional view of the principal part which shows the detent mechanism etc. of Example 4.

以下に、本発明による空気ばね並びに空気ばね構造の実施の形態を、図面を参照しながら説明する。   Embodiments of an air spring and an air spring structure according to the present invention will be described below with reference to the drawings.

〔実施例1〕
図4に、トラック(鉄道車両、バス等でも良い)の車体フレーム(ばね上部の一例)Fと車軸側(ばね下部の一例)fとの間に設けられる空気ばねA及び空気ばね装置Kを示してある。即ち、空気ばね装置Kは、車体21の通路部22を支える車体フレームFの取付板23と、アクスル24の上面板27との上下間に空気ばねA(実施例1)を配する構成、即ち、空気ばね構造である。尚、25はタイヤ、26はタイヤハウス、Cは車体の左右センターである。
[Example 1]
FIG. 4 shows an air spring A and an air spring device K provided between a body frame (an example of an upper part of a spring) F and an axle side (an example of an unsprung part) f of a truck (which may be a railway vehicle, a bus, etc.). It is. That is, the air spring device K has a configuration in which the air spring A (Embodiment 1) is arranged between the upper and lower plates 27 of the vehicle body frame F that supports the passage portion 22 of the vehicle body 21 and the upper surface plate 27 of the axle 24. The air spring structure. Incidentally, 25 is a tire, 26 is a tire house, and C is a left and right center of the vehicle body.

空気ばねAは、図1に示すように、気体室Sの壁部を構成する縦形円筒状のダイヤフラム(筒状ゴム膜の一例)1と、その縦向きの軸心Pを有するダイヤフラム1の上端に形成される大径ビード部(一端部の一例)1Aにかしめ固定される円板状のアッパープレート(大径板状部材の一例)2と、ダイヤフラム1の下端に形成される小径ビード部(他端部の一例)1Bに密嵌されるピストン3とを備えて構成されている。アッパープレート2、これを車体フレームF(図4参照)に取付固定するための取付ボルト5と、気体室Sに対する空気給排孔4とを備えている。空気給排孔4は、アッパープレート2に貫通溶接して気密に固着される金属製パイプ12等で構成されている。   As shown in FIG. 1, the air spring A includes a vertical cylindrical diaphragm (an example of a cylindrical rubber film) 1 that constitutes a wall portion of the gas chamber S, and an upper end of the diaphragm 1 having a longitudinal axis P thereof. A large-diameter bead portion (an example of one end portion) formed on the disk-shaped upper plate (an example of a large-diameter plate-like member) 2 that is caulked and fixed to 1A, and a small-diameter bead portion formed on the lower end of the diaphragm 1 ( An example of the other end portion) is provided with a piston 3 that is closely fitted to 1B. The upper plate 2 includes a mounting bolt 5 for mounting and fixing the upper plate 2 to the vehicle body frame F (see FIG. 4), and an air supply / discharge hole 4 for the gas chamber S. The air supply / exhaust hole 4 is constituted by a metal pipe 12 or the like that is welded to the upper plate 2 and is hermetically fixed.

ピストン3は、合成樹脂製の主筒部6と、金属板製のビード押え8、取付ボルト9、ゴムや軟質樹脂等から成るクッション材10を有して構成されている。主筒部6は、図1,図2に示すように、基本的には下窄まり状であって下端部が湾曲下拡がりする転動用側周面7、受け皿状のビード押さえ8を載せ付けるための下方凹み部6a、下方凹み部6aの外周部である水平環頂面6b、ボルト挿通孔6c、主筒部6の下面6dに臨む下向き開放の係合穴11、周リブ6e,6i、放射リブ6f,6g,6h等を有して成る型成形品である。下面6dは、各リブ6e〜6iの底面をも含む面であって、要は上面板27に載せ付けられれう面である。   The piston 3 includes a main tube portion 6 made of synthetic resin, a bead presser 8 made of metal plate, a mounting bolt 9, and a cushion material 10 made of rubber, soft resin, or the like. As shown in FIGS. 1 and 2, the main cylinder portion 6 is basically mounted with a rolling-side peripheral surface 7 whose bottom end is curved and expands, and a tray-shaped bead retainer 8. Lower recessed portion 6a, a horizontal ring top surface 6b which is an outer peripheral portion of the lower recessed portion 6a, a bolt insertion hole 6c, a downwardly opening engaging hole 11 facing the lower surface 6d of the main cylindrical portion 6, circumferential ribs 6e, 6i, This is a molded product having radiation ribs 6f, 6g, 6h and the like. The lower surface 6 d is a surface that also includes the bottom surfaces of the ribs 6 e to 6 i, and is essentially a surface that can be placed on the upper surface plate 27.

ビード押え8は、その上面(符記省略)に加硫接着等によって断面形状が略台形のクッション材10が一体的に設けられており、それによって予め中心孔(符記省略)に通されている取付ボルト9との三部品が一体化されたコンプリート部品に形成されている。ビード押え8が主筒部6に装備された状態では、その嵌合筒部8aと水平環頂面6bとの協働によって小径ビード部1Bを嵌合装着している。転動用側周面7には、ダイヤフラム1の下側が内側に折り返された部分である裏返し筒部分1Cが被さっている。このように、ダイヤフラム1がピストン3に被さるように押し込まれており、主筒部6の外周面7がその裏返し筒部分1Cを転動案内可能に構成されている。   The bead retainer 8 is integrally provided with a cushion material 10 having a substantially trapezoidal cross-sectional shape by vulcanization adhesion or the like on its upper surface (not shown), so that it passes through a center hole (not shown) in advance. The three parts with the mounting bolt 9 are formed into a complete part. In a state where the bead presser 8 is mounted on the main cylinder portion 6, the small diameter bead portion 1B is fitted and mounted by the cooperation of the fitting cylinder portion 8a and the horizontal ring top surface 6b. The rolling side peripheral surface 7 is covered with an inverted tube portion 1C which is a portion where the lower side of the diaphragm 1 is folded back inward. In this way, the diaphragm 1 is pushed so as to cover the piston 3, and the outer peripheral surface 7 of the main cylinder portion 6 is configured to be able to roll and guide the inverted cylinder portion 1C.

次に、回り止め機構Bについて説明する。図1〜図3に示すように、ピストン3に、これを支持するアクスル24の上面板(ピストン支持部材fの一例)27との軸心P回りの相対回動を阻止する回り止め機構Bが装備されている。即ち、回り止め機構Bは、上面板27に設けられて軸心P方向に突出する軸ピン(突起部の一例)13を内嵌可能に主筒部6に設けられた係合穴11によって構成されている。   Next, the detent mechanism B will be described. As shown in FIGS. 1 to 3, the rotation prevention mechanism B that prevents relative rotation about the axis P with the upper surface plate (an example of the piston support member f) 27 of the axle 24 that supports the piston 3 is provided on the piston 3. Equipped. That is, the anti-rotation mechanism B is configured by an engagement hole 11 provided in the main cylinder portion 6 so that a shaft pin (an example of a projection portion) 13 provided on the upper surface plate 27 and protruding in the direction of the axis P can be fitted therein. Has been.

空気ばねAを実機に組付けて空気ばね装置Kとする空気ばね構造は、アッパープレート2を取付板23にボルト止めするとともに、ピストン3を上面板27の孔27aに単一の取付ボルト9を通してばねワッシャ9b及びナット9aを用いて螺着する。この場合、取付ボルト9は軸心P上にあることからナット9aの回し操作によってピストン3が連れ回りするおそれがあるので、それを防止してダイヤフラム1に捩れが生じることが無いようにピストン3を所定の位置に正しく螺着させるために回り止め機構Bが機能する。つまり、係合孔11に軸ピン13が嵌入する位置にて取付ボルト9を孔27aに通してナット止めすることにより、ピストン3をこれとアクスル24との相対位置が定まった状態で組付けることができる。   In the air spring structure in which the air spring A is assembled to the actual machine to form the air spring device K, the upper plate 2 is bolted to the mounting plate 23 and the piston 3 is passed through the hole 27a of the upper surface plate 27 through a single mounting bolt 9. Screwed using a spring washer 9b and a nut 9a. In this case, since the mounting bolt 9 is on the shaft center P, there is a possibility that the piston 3 is rotated by the turning operation of the nut 9a. Therefore, the piston 3 is prevented from being twisted so that the diaphragm 1 is not twisted. The anti-rotation mechanism B functions in order to screw it in place. That is, the piston 3 is assembled in a state in which the relative position between the piston 3 and the axle 24 is fixed by passing the mounting bolt 9 through the hole 27a and fastening the nut at the position where the shaft pin 13 is fitted into the engagement hole 11. Can do.

又、ピストン3の連れ回り防止構造は、言い方を変えると、ピストン3とばね下部fである上面板27との軸心P周りの相対回動移動を阻止する回り止め手段Dである。つまり、回り止め手段Dは、ピストン3とばね下部fとの何れか一方である上面板27に設けられて軸心P方向に突出する突起部tである軸ピン13と、ピストン3とばね下部fとの何れか他方であるピストン3に設けられて軸ピン13を内嵌可能な係合穴h(係合穴11)とで構成されている。つまり、空気ばねAには回り止め機構Bが装備されており、空気ばね装置(空気ばね構造)Kには回り止め手段Dが構成されている。   In other words, the accompanying rotation preventing structure of the piston 3 is a rotation preventing means D that prevents the relative rotational movement around the axis P between the piston 3 and the upper plate 27 that is the unsprung portion f. That is, the rotation preventing means D includes the shaft pin 13 which is a protrusion t provided on the upper surface plate 27 which is either the piston 3 or the unsprung portion f, and projects in the direction of the axis P, and the piston 3 and the unsprung portion. It is configured by an engagement hole h (engagement hole 11) provided in the piston 3 which is the other of f and into which the shaft pin 13 can be fitted. That is, the air spring A is equipped with a rotation prevention mechanism B, and the air spring device (air spring structure) K is provided with rotation prevention means D.

回り止め機構Bである係合穴11は、転動用側周面7を有する外郭壁6Aと中間周リブ6iとの間における中間周リブ6i寄りの径方向位置で、かつ、連続放射リブ6fの延長線上にある外放射リブ6hの部分に肉盛されて成る座部17に形成されている。従って、合成樹脂製であっても、螺着操作によって係合穴11に作用する回動トルクに十分耐えることができる構造となっている。   The engagement hole 11 serving as the rotation preventing mechanism B is located at a radial position near the intermediate peripheral rib 6i between the outer wall 6A having the rolling side peripheral surface 7 and the intermediate peripheral rib 6i and of the continuous radiation rib 6f. It is formed in the seat part 17 which is built up on the part of the external radiation rib 6h on the extension line. Therefore, even if it is a product made from a synthetic resin, it has a structure that can sufficiently withstand the rotational torque acting on the engagement hole 11 by the screwing operation.

〔実施例2〕
回り止め機構Bの実施例2としては、図5に示すように、アクスル24に設けられて軸心P方向に突出する軸ピン13を内嵌可能であり、かつ、内周が金属製有蓋筒16で補強されている係合穴11によって構成されても良い。これは、合成樹脂による局部応力の弱さをカバーするものであって、主筒部6の成形時に有蓋筒16をインサートしておけば好都合であるが、主筒部6に形成されている装着用穴11Aに有蓋筒16を圧入して設ける構造でも良い。
[Example 2]
As a second embodiment of the rotation preventing mechanism B, as shown in FIG. 5, a shaft pin 13 provided on the axle 24 and protruding in the direction of the axis P can be fitted, and the inner periphery is a metal covered cylinder. It may be constituted by the engagement hole 11 reinforced by 16. This covers the weakness of local stress due to the synthetic resin, and it is convenient if the covered cylinder 16 is inserted when the main cylinder part 6 is molded, but the mounting formed on the main cylinder part 6 A structure in which the covered cylinder 16 is press-fitted into the hole 11A may be used.

実施例2の回り止め機構Bは、ピストン3に形成されている補強された係合穴11と、上面板27に植設されて係合穴11に嵌入可能な軸ピン13とを設けて、ピストン3と上面板27との軸心P周りの相対回動移動を阻止する回り止め手段Dでもある。   The anti-rotation mechanism B of the second embodiment includes a reinforced engagement hole 11 formed in the piston 3 and a shaft pin 13 that is implanted in the upper surface plate 27 and can be fitted into the engagement hole 11. It is also a detent means D that prevents the relative rotational movement of the piston 3 and the upper surface plate 27 around the axis P.

〔実施例3〕
回り止め機構Bの実施例3としては、図6に示すように、上面板27に設けられて軸心P方向に凹む係合孔(係合穴の一例)14に内嵌可能に、主筒部6から下方に突出形成される突起部15によって構成されても良い。突起部15は主筒部6(座部17)と一体形成される合成樹脂製のものである。係合孔14及び突起部15は、共に軸心P方向視の形状が円形であるが、それ以外の形状でも良い。実施例3の回り止め機構Bは、ピストン3に設けられて軸心P方向に突出する突起部tと、上面板に設けられて突起部tを内嵌可能な係合穴hとから構成される回り止め手段Dでもある。
Example 3
As shown in FIG. 6, the third embodiment of the rotation preventing mechanism B includes a main cylinder that can be fitted in an engagement hole (an example of an engagement hole) 14 provided in the upper surface plate 27 and recessed in the axis P direction. You may be comprised by the projection part 15 projected and formed from the part 6 below. The protruding portion 15 is made of a synthetic resin that is integrally formed with the main cylinder portion 6 (seat portion 17). Both the engagement hole 14 and the protrusion 15 have a circular shape when viewed in the direction of the axis P, but may have other shapes. The anti-rotation mechanism B according to the third embodiment includes a protrusion t that is provided on the piston 3 and protrudes in the direction of the axis P, and an engagement hole h that is provided on the upper surface plate and into which the protrusion t can be fitted. It is also a detent means D.

〔実施例4〕
回り止め機構Bの実施例4としては、図7に示すように、上面板27に設けられて軸心P方向に凹む係合孔(係合穴の一例)14に内嵌可能に、主筒部6から下方に突出形成される突起部15によって構成されても良い。突起部15は、主筒部6(座部17)に成形時のインサート又は後処理(圧入等)によって植設される金属製のピンで成り、強度的に十分なものとされている。実施例4の回り止め機構Bは、ピストン3に設けられて軸心P方向に突出する突起部tと、上面板に設けられて突起部tを内嵌可能な係合穴hとから構成される回り止め手段Dでもある。
Example 4
As shown in FIG. 7, the anti-rotation mechanism B according to the fourth embodiment includes a main cylinder that can be fitted in an engagement hole (an example of an engagement hole) 14 provided in the upper surface plate 27 and recessed in the direction of the axis P. You may be comprised by the projection part 15 projected and formed from the part 6 below. The projecting portion 15 is made of an insert at the time of molding or a metal pin implanted by post-processing (press-fit or the like) on the main cylinder portion 6 (seat portion 17), and is sufficiently strong in strength. The anti-rotation mechanism B according to the fourth embodiment includes a protrusion t that is provided on the piston 3 and protrudes in the direction of the axis P, and an engagement hole h that is provided on the top plate and into which the protrusion t can be fitted. It is also a detent means D.

〔別実施例〕
ピストン3を構成する主筒部6が鋼板やアルミ合金等の金属製でも良い。また、係合穴11や突起部15等による回り止め機構Bや、ピンと穴との係合による等の構造を持つ回り止め手段Dは、軸心P回りの複数箇所にあっても良い。また、いずれも図示は省略するが、上面板(ピストン支持部材、ばね下部)27に設けられる凸部に嵌合可能に主筒部6の外周面に径方向に凹入形成される凹部による回り止め機構や、主筒部6の外周面に形成される径方向に凹入した凹部と、その凹部に嵌り込み可能に上面板27に設けられる凸部とで成る回り止め手段も可能である。図示は省略するが、ビード押え8と主筒部6とを固定するロックナット、を取り付けボルト9に別途装備すれば好都合である(図1参照)。
[Another Example]
The main cylinder portion 6 constituting the piston 3 may be made of a metal such as a steel plate or an aluminum alloy. Further, the anti-rotation mechanism B using the engagement holes 11 and the protrusions 15 and the like, and the anti-rotation means D having a structure such as by engaging the pin and the hole may be provided at a plurality of locations around the axis P. In addition, although illustration is omitted in all cases, rotation by a recess formed in a radially recessed manner on the outer peripheral surface of the main cylinder portion 6 so as to be able to be fitted to a protrusion provided on the upper surface plate (piston support member, spring lower portion) 27. A detent means comprising a stop mechanism or a radially recessed portion formed on the outer peripheral surface of the main cylinder portion 6 and a projecting portion provided on the upper surface plate 27 so as to be fitted into the recessed portion is also possible. Although illustration is omitted, it is convenient if the mounting bolt 9 is separately equipped with a lock nut for fixing the bead presser 8 and the main cylinder portion 6 (see FIG. 1).

1 筒状ゴム膜
1C 裏返し筒部分
2 大径板状部材
3 ピストン
7 周面
11 係合穴
13 突起部
14 係合穴
15 突起部
16 筒部材
B 回り止め機構
D 回り止め手段
F ばね上部
P 軸心
f ピストン支持部材、ばね下部
h 係合穴
t 突起部
DESCRIPTION OF SYMBOLS 1 Cylindrical rubber film 1C Reversed cylinder part 2 Large diameter plate-shaped member 3 Piston 7 Circumferential surface 11 Engagement hole 13 Protrusion part 14 Engagement hole 15 Protrusion part 16 Cylindrical member B Anti-rotation mechanism D Anti-rotation means F Spring upper part P axis Center f Piston support member, lower part of spring h engagement hole t protrusion

Claims (5)

筒状ゴム膜と、これの軸心方向の一端部に気密接合される大径板状部材と、前記筒状ゴム膜の軸心方向の他端部に気密接合されるピストンとを有し、前記筒状ゴム膜の弾性変形に伴って前記他端部側が折り返されて成る裏返し筒部分を転動案内可能な周面が前記ピストンに形成されている空気ばねであって、
前記ピストンに、これを支持するピストン支持部材との前記軸心回りの相対回動を阻止する回り止め機構が装備されている空気ばね。
A cylindrical rubber film, a large-diameter plate-like member that is airtightly joined to one end portion in the axial direction of the cylindrical rubber film, and a piston that is airtightly joined to the other end portion in the axial direction of the cylindrical rubber film, An air spring formed on the piston with a circumferential surface capable of rolling and guiding an inverted tube portion formed by folding the other end side with elastic deformation of the cylindrical rubber film,
An air spring in which the piston is equipped with an anti-rotation mechanism that prevents relative rotation about the axis with the piston support member that supports the piston.
前記回り止め機構が、前記ピストン支持部材に設けられて前記軸心方向に突出する突起部を内嵌可能な係合穴、又は前記ピストン支持部材に設けられて前記軸心方向に凹む係合穴に内嵌可能な突起部を有して構成されている請求項1に記載の空気ばね。   An engagement hole in which the detent mechanism is provided in the piston support member and can be fitted with a protrusion protruding in the axial direction, or an engagement hole provided in the piston support member and recessed in the axial direction The air spring according to claim 1, wherein the air spring is configured to have a protrusion that can be fitted inside. 前記ピストンが合成樹脂製であるとともに、前記回り止め機構が、前記ピストン支持部材に設けられて前記軸心方向に突出する突起部を内嵌可能であり、かつ、内周が硬質材による筒部材で補強されている係合穴によって構成されている請求項1に記載の空気ばね。   The piston is made of synthetic resin, and the anti-rotation mechanism can be fitted into a protrusion provided on the piston support member and projecting in the axial direction, and the inner periphery is a cylindrical member made of a hard material The air spring according to claim 1, wherein the air spring is constituted by an engagement hole reinforced by the above. 筒状ゴム膜と、これの軸心方向の一端部に気密接合されてばね上部に被支持可能な大径板状部材と、前記筒状ゴム膜の軸心方向の他端部に気密接合されてばね下部に被支持可能なピストンとを有し、前記筒状ゴム膜の弾性変形に伴って前記他端部側が折り返されて成る裏返し筒部分を転動案内可能な周面が前記ピストンに形成されている空気ばね構造であって、
前記ピストンと前記ばね下部との前記軸心周りの相対回動移動を阻止する回り止め手段が構成されている空気ばね構造。
A cylindrical rubber film, a large-diameter plate-like member that is hermetically bonded to one end in the axial direction of the cylindrical rubber film, and can be supported on the upper portion of the spring, and hermetically bonded to the other end in the axial direction of the cylindrical rubber film. And a piston that can be supported at the lower part of the spring, and a circumferential surface capable of rolling and guiding a reverse cylinder part formed by folding the other end side with the elastic deformation of the cylindrical rubber film is formed on the piston. An air spring structure,
An air spring structure in which a detent means for preventing relative rotational movement of the piston and the lower part of the spring around the axis is configured.
前記回り止め手段が、前記ピストンと前記ばね下部との何れか一方に設けられて前記軸心方向に突出する突起部と、前記ピストンと前記ばね下部との何れか他方に設けられて前記突起部を内嵌可能な係合穴とから構成されている請求項4に記載の空気ばね構造。   The rotation preventing means is provided on one of the piston and the lower part of the spring and protrudes in the axial direction, and is provided on the other of the piston and the lower part of the spring. The air spring structure according to claim 4, wherein the air spring structure is configured by an engagement hole that can be fitted inside.
JP2009137489A 2009-06-08 2009-06-08 Air spring Expired - Fee Related JP5277080B2 (en)

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