JP2021156397A - Air spring - Google Patents

Air spring Download PDF

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JP2021156397A
JP2021156397A JP2020059003A JP2020059003A JP2021156397A JP 2021156397 A JP2021156397 A JP 2021156397A JP 2020059003 A JP2020059003 A JP 2020059003A JP 2020059003 A JP2020059003 A JP 2020059003A JP 2021156397 A JP2021156397 A JP 2021156397A
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inner cylinder
rubber
cylinder
peripheral surface
air spring
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JP7401375B2 (en
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直紀 坂口
Naoki Sakaguchi
直紀 坂口
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Nippon Steel Corp
Nitta Chemical Industrial Products Co Ltd
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Nippon Steel Corp
Nitta Chemical Industrial Products Co Ltd
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Abstract

To detachably attach a protection member to an inner cylinder in an easy manner without increasing the number of components and work hours for production.SOLUTION: An air spring includes an outer cylinder 1, an inner cylinder 2, and a cylindrical flexible member 3 attached to an area between the outer cylinder 1 and the inner cylinder 2. An inner cylinder rubber 10 serving as a protection member is provided on an inner peripheral surface, which contacts with the flexible member 3, of the inner cylinder 2. Further, the air spring is provided with a fitting part 12 for preventing falling in which the inner cylinder 2 and the inner cylinder rubber 10 are fitted and fixed. As the fitting part 12, a protruding part 13 is formed on an inner peripheral surface of the cylindrical inner cylinder rubber 10 and a recessed part 14 is formed on an outer peripheral surface of the inner cylinder 2. The inner cylinder rubber 10 is attached to the inner cylinder 2 by fitting the protruding part 13 in the recessed part 14.SELECTED DRAWING: Figure 1

Description

本発明は、鉄道等の車両に用いられる空気ばねに関する。 The present invention relates to an air spring used in a vehicle such as a railroad.

鉄道車両に用いられる空気ばねは、外筒と、内筒と、外筒と内筒との間に取り付けられたダイヤフラム等の可撓部材とを備えている。そして、内筒と可撓部材との間に、可撓部材の摩耗を防止するために内筒ゴムが設けられている。このゴムは、加硫接着あるいは接着剤による接着によって内筒に取り付けられる。この従来の製作方法では、製作工数が多くなる、また部品交換の際、外筒そのものを交換する必要があり、交換工数が増えるといった問題がある。 The air spring used in a railroad vehicle includes an outer cylinder, an inner cylinder, and a flexible member such as a diaphragm attached between the outer cylinder and the inner cylinder. An inner cylinder rubber is provided between the inner cylinder and the flexible member in order to prevent wear of the flexible member. This rubber is attached to the inner cylinder by vulcanization adhesion or adhesive adhesion. This conventional manufacturing method has problems that the manufacturing man-hours increase, and that it is necessary to replace the outer cylinder itself when replacing parts, which increases the replacement man-hours.

そこで、内筒ゴムを容易に着脱できるように、特許文献１には、嵌合用芯金を一体的に接着したエラストマーの筒状体を内筒に形成した突起上に載置することが記載されている。 Therefore, in order to easily attach and detach the inner cylinder rubber, Patent Document 1 describes that an elastomer tubular body to which a fitting core metal is integrally adhered is placed on a protrusion formed on the inner cylinder. ing.

実開昭６１−１９７３３８号公報Jikkai Sho 61-197338

上記の筒状体に芯金を用いることにより、部品重量が増加するとともに、製作工数も増加するといった問題が生じる。そこで、本発明は、上記に鑑み、部品や製作工数を増やすことなく、内筒ゴムを内筒に簡単に取り付けることができる空気ばねの提供を目的とする。 By using a core metal for the above-mentioned tubular body, there arises a problem that the weight of parts increases and the man-hours for manufacturing also increase. Therefore, in view of the above, it is an object of the present invention to provide an air spring that can easily attach the inner cylinder rubber to the inner cylinder without increasing the number of parts and manufacturing man-hours.

本発明の空気ばねは、外筒と、内筒と、外筒と内筒との間に取り付けられた筒状の可撓部材とを備え、内筒の可撓部材と接触する外周面に保護部材が設けられ、内筒と保護部材とを嵌め込んで固定する脱落防止用の嵌合部が設けられる。 The air spring of the present invention includes an outer cylinder, an inner cylinder, and a tubular flexible member attached between the outer cylinder and the inner cylinder, and protects the outer peripheral surface of the inner cylinder in contact with the flexible member. A member is provided, and a fitting portion for preventing falling off is provided for fitting and fixing the inner cylinder and the protective member.

保護部材と内筒との一方を他方に嵌め込む、すなわち保護部材を内筒に嵌め込む、あるいは内筒を保護部材に嵌め込むことにより、保護部材が内筒に脱落しないように固定される。 By fitting one of the protective member and the inner cylinder into the other, that is, fitting the protective member into the inner cylinder, or fitting the inner cylinder into the protective member, the protective member is fixed so as not to fall off into the inner cylinder.

嵌合部として、筒状の保護部材の内周面に凸部が形成され、内筒に凹部が形成され、凸部が凹部に嵌め込まれる。あるいは、内筒に凸部が形成され、保護部材の内周面に凹部が形成される。保護部材の一部が内筒に嵌め込まれ、保護部材が内筒に固定される。また、凸部を凹部から抜き出すことにより、保護部材を内筒から取り外すことができる。 As a fitting portion, a convex portion is formed on the inner peripheral surface of the tubular protective member, a concave portion is formed on the inner cylinder, and the convex portion is fitted into the concave portion. Alternatively, a convex portion is formed on the inner cylinder, and a concave portion is formed on the inner peripheral surface of the protective member. A part of the protective member is fitted into the inner cylinder, and the protective member is fixed to the inner cylinder. Further, the protective member can be removed from the inner cylinder by pulling out the convex portion from the concave portion.

本発明によると、保護部材を内筒に接着することなく簡単に取り付けることができ、制作工数の削減、作業の簡易化を図ることができる。また、保護部材は着脱可能に内筒に取り付けられるので、保護部材の交換を容易に行うことができ、内筒の再利用も可能となる。 According to the present invention, the protective member can be easily attached without being adhered to the inner cylinder, the production man-hours can be reduced, and the work can be simplified. Further, since the protective member is detachably attached to the inner cylinder, the protective member can be easily replaced and the inner cylinder can be reused.

本発明の実施形態に係る空気ばねの縦断面図Longitudinal sectional view of the air spring according to the embodiment of the present invention. 内筒ゴムの平面図Top view of inner cylinder rubber

本発明の鉄道車両に用いられる空気ばねを図１に示す。空気ばねは、車体に取り付けられる外筒１と、外筒１の下方に配置され、台車に取り付けられる内筒２と、外筒１と内筒２との間に取り付けられた筒状の可撓部材３とを備えている。 The air spring used in the railway vehicle of the present invention is shown in FIG. The air spring is a tubular flexible cylinder 1 attached to the vehicle body, an inner cylinder 2 arranged below the outer cylinder 1 and attached to the bogie, and between the outer cylinder 1 and the inner cylinder 2. It includes a member 3.

金属製の外筒１は、上面が閉塞され、下面が開放された円筒状に形成される。外筒１の上面の上側中央に、上方に向かって突出した上ボス部４が設けられ、外筒１の上面の下側に、下方に向かって突出した円環状のリブ５が形成されている。金属製の内筒２は、上下のフランジ６，７を有する円筒状に形成される。上下のフランジ６，７は、内筒２の外周面よりも側方に突出している。上フランジ６の上面に、ストッパ８が取り付けられ、ストッパ８よりも外周側に上方に向かって突出した円環状のリブ９が形成されている。 The metal outer cylinder 1 is formed in a cylindrical shape with the upper surface closed and the lower surface open. An upper boss portion 4 projecting upward is provided in the upper center of the upper surface of the outer cylinder 1, and an annular rib 5 projecting downward is formed below the upper surface of the outer cylinder 1. .. The metal inner cylinder 2 is formed in a cylindrical shape having upper and lower flanges 6 and 7. The upper and lower flanges 6 and 7 project laterally from the outer peripheral surface of the inner cylinder 2. A stopper 8 is attached to the upper surface of the upper flange 6, and an annular rib 9 protruding upward from the stopper 8 is formed.

可撓部材３として、ゴム製のダイアフラムが使用される。なお、ダイアフラムの代わりにベローズを用いてもよい。可撓部材３の上端部が上側のリブ５の外周側に嵌め込まれ、可撓部材３の下端部が下側のリブ９の外周側に嵌め込まれる。可撓部材３は、外筒１の側面の内周面に接触するとともに、内筒２の側面の外周面にも接触する。 A rubber diaphragm is used as the flexible member 3. A bellows may be used instead of the diaphragm. The upper end of the flexible member 3 is fitted to the outer peripheral side of the upper rib 5, and the lower end of the flexible member 3 is fitted to the outer peripheral side of the lower rib 9. The flexible member 3 contacts the inner peripheral surface of the side surface of the outer cylinder 1 and also contacts the outer peripheral surface of the side surface of the inner cylinder 2.

内筒２の可撓部材３と接触する外周面に、可撓部材３の摩耗を防止して、可撓部材３を保護するための保護部材である内筒ゴム１０が設けられる。円環状の内筒ゴム１０は内筒２と可撓部材３との間に介在する。また、外筒１の可撓部材３と接触する内周面に保護部材である外筒ゴム１１が設けられる。円環状の外筒ゴム１１は外筒１と可撓部材３との間に介在する。外筒ゴム１１は、接着剤による接着あるいは加硫接着によって外筒１の内周面に取り付けられる。外筒ゴム１１が外筒１に取り付けられたとき、外筒ゴム１１の下端は、外筒１の下端と揃っている。 An inner cylinder rubber 10 which is a protective member for preventing wear of the flexible member 3 and protecting the flexible member 3 is provided on the outer peripheral surface of the inner cylinder 2 in contact with the flexible member 3. The annular inner cylinder rubber 10 is interposed between the inner cylinder 2 and the flexible member 3. Further, an outer cylinder rubber 11 as a protective member is provided on the inner peripheral surface of the outer cylinder 1 in contact with the flexible member 3. The annular outer cylinder rubber 11 is interposed between the outer cylinder 1 and the flexible member 3. The outer cylinder rubber 11 is attached to the inner peripheral surface of the outer cylinder 1 by adhesion with an adhesive or vulcanization adhesion. When the outer cylinder rubber 11 is attached to the outer cylinder 1, the lower end of the outer cylinder rubber 11 is aligned with the lower end of the outer cylinder 1.

そして、内筒ゴム１０を内筒２に嵌め込んで固定する脱落防止用の嵌合部１２が設けられる。嵌合部１２として、内筒ゴム１０の内周面に凸部１３が形成され、内筒２に凹部１４が形成される。凹部１４は円形あるいは多角形の凹みとされ、凸部１３はこの凹みと同形状で同じ大きさか少しだけ大きい突起とされる。図２に示すように、複数、例えば４個の凸部１３が等間隔に配設される。すなわち、複数の嵌合部１２が設けられる。 Then, a fitting portion 12 for preventing the inner cylinder from falling off is provided so that the inner cylinder rubber 10 is fitted into the inner cylinder 2 and fixed. As the fitting portion 12, a convex portion 13 is formed on the inner peripheral surface of the inner cylinder rubber 10, and a concave portion 14 is formed on the inner cylinder 2. The concave portion 14 is a circular or polygonal concave portion, and the convex portion 13 is a protrusion having the same shape as the concave portion and having the same size or slightly larger. As shown in FIG. 2, a plurality of, for example, four convex portions 13 are arranged at equal intervals. That is, a plurality of fitting portions 12 are provided.

内筒ゴム１０を内筒２に被せ、内筒ゴム１０の凸部１３を内筒２の凹部１４に嵌め込むことにより、内筒ゴム１０が内筒１に固定される。内筒２の外周面の内筒ゴム１０が取り付けられる部分は少し凹んでおり、内筒ゴム１０の外周面は上フランジ６の側端と揃えられている。可撓部材３が内筒ゴム１０から上フランジ６に沿って密接する。内筒ゴム１０の下端と下フランジ７との間には隙間がある。 The inner cylinder rubber 10 is fixed to the inner cylinder 1 by covering the inner cylinder 2 with the inner cylinder rubber 10 and fitting the convex portion 13 of the inner cylinder rubber 10 into the concave portion 14 of the inner cylinder 2. The portion of the outer peripheral surface of the inner cylinder 2 to which the inner cylinder rubber 10 is attached is slightly recessed, and the outer peripheral surface of the inner cylinder rubber 10 is aligned with the side end of the upper flange 6. The flexible member 3 comes into close contact with the inner cylinder rubber 10 along the upper flange 6. There is a gap between the lower end of the inner cylinder rubber 10 and the lower flange 7.

このように、内筒ゴム１０の一部が内筒２に保持されるので、加硫接着や接着剤による接着を行わなくても、内筒ゴム１０を脱落しないように、かつずれないように内筒２に取り付けることができる。しかも、内筒ゴム１０を嵌め込むだけで簡単に取り付けることができ、空気ばねの組み立て作業が容易になり、製作工数を削減でき、部品重量の増加も防げる。また、内筒２に取り付けられた内筒ゴム１０を引き伸ばしながらずらすことにより、内筒ゴム１０を内筒２から簡単に取り外すことができ、内筒ゴム１０の交換作業を容易に行える。しかも、内筒ゴム１０は接着されていないので、内筒２の再利用が可能となる。 In this way, a part of the inner cylinder rubber 10 is held by the inner cylinder 2, so that the inner cylinder rubber 10 does not fall off and does not shift even if it is not vulcanized or adhered with an adhesive. It can be attached to the inner cylinder 2. Moreover, it can be easily attached by simply fitting the inner cylinder rubber 10, the assembly work of the air spring is facilitated, the manufacturing man-hours can be reduced, and the increase in the weight of the parts can be prevented. Further, by shifting the inner cylinder rubber 10 attached to the inner cylinder 2 while stretching it, the inner cylinder rubber 10 can be easily removed from the inner cylinder 2, and the inner cylinder rubber 10 can be easily replaced. Moreover, since the inner cylinder rubber 10 is not adhered, the inner cylinder 2 can be reused.

なお、本発明は、上記実施形態に限定されるものではなく、本発明の範囲内で上記実施形態に多くの修正および変更を加え得ることは勿論である。内筒ゴム１０の凸部１３を先端に向かって広がるテーパ状に形成してもよい。これに合わせて、内筒２の凹部１４をテーパ状の凹みにする。また、内筒２の凹部１４を内周面の全周にわたって形成してもよく、凸部１３を内筒ゴム１０の外周面の全周にわたって形成する。 It should be noted that the present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention. The convex portion 13 of the inner cylinder rubber 10 may be formed in a tapered shape extending toward the tip. In line with this, the recess 14 of the inner cylinder 2 is made into a tapered recess. Further, the concave portion 14 of the inner cylinder 2 may be formed over the entire circumference of the inner peripheral surface, and the convex portion 13 may be formed over the entire circumference of the outer peripheral surface of the inner cylinder rubber 10.

内筒２の外周面に、外面側に向かって突出する凸部１３を形成し、内筒ゴム１０に凹部１４として凹みを形成してもよい。保護部材として、フッ素樹脂、ポリアセタールなどの摩擦係数の小さい樹脂製の筒を用いてもよい。 A convex portion 13 protruding toward the outer surface side may be formed on the outer peripheral surface of the inner cylinder 2, and a recess may be formed as a concave portion 14 on the inner cylinder rubber 10. As the protective member, a cylinder made of a resin having a small friction coefficient such as fluororesin or polyacetal may be used.

１ 外筒
２ 内筒
３ 可撓部材
１０ 内筒ゴム
１１ 外筒ゴム
１２ 嵌合部
１３ 凸部
１４ 凹部 1 Outer cylinder 2 Inner cylinder 3 Flexible member 10 Inner cylinder rubber 11 Outer cylinder rubber 12 Fitting part 13 Convex part 14 Concave part

Claims (2)

外筒と、内筒と、外筒と内筒との間に取り付けられた筒状の可撓部材とを備え、内筒の可撓部材と接触する外周面に保護部材が設けられた空気ばねであって、内筒と保護部材とを嵌め込んで固定する脱落防止用の嵌合部が設けられたことを特徴とする空気ばね。 An air spring provided with an outer cylinder, an inner cylinder, and a tubular flexible member attached between the outer cylinder and the inner cylinder, and a protective member provided on an outer peripheral surface in contact with the flexible member of the inner cylinder. The air spring is characterized by being provided with a fitting portion for preventing the inner cylinder and the protective member from being fitted and fixed. 嵌合部として、筒状の保護部材の内周面に凸部が形成され、内筒に凹部が形成され、凸部が凹部に嵌め込まれることを特徴とする請求項１記載の空気ばね。 The air spring according to claim 1, wherein as the fitting portion, a convex portion is formed on the inner peripheral surface of the tubular protective member, a concave portion is formed on the inner cylinder, and the convex portion is fitted into the concave portion.
JP2020059003A 2020-03-27 2020-03-27 air spring Active JP7401375B2 (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988353A (en) * 1957-05-09 1961-06-13 Gen Motors Corp Pneumatic spring construction
JPS4813319Y1 (en) * 1967-07-22 1973-04-11
JPS60121335A (en) * 1983-12-01 1985-06-28 Sumitomo Electric Ind Ltd Rubber ring for preventing wear of air spring
JPS61197338U (en) * 1985-05-30 1986-12-09
JP2001245424A (en) * 2000-02-29 2001-09-07 Sumitomo Wiring Syst Ltd Grommet
JP2018162797A (en) * 2017-03-24 2018-10-18 日立オートモティブシステムズ株式会社 Cylinder device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4813319B2 (en) 2006-10-11 2011-11-09 富士フイルム株式会社 Reel and reel manufacturing method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2988353A (en) * 1957-05-09 1961-06-13 Gen Motors Corp Pneumatic spring construction
JPS4813319Y1 (en) * 1967-07-22 1973-04-11
JPS60121335A (en) * 1983-12-01 1985-06-28 Sumitomo Electric Ind Ltd Rubber ring for preventing wear of air spring
JPS61197338U (en) * 1985-05-30 1986-12-09
JP2001245424A (en) * 2000-02-29 2001-09-07 Sumitomo Wiring Syst Ltd Grommet
JP2018162797A (en) * 2017-03-24 2018-10-18 日立オートモティブシステムズ株式会社 Cylinder device

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