JP2007040489A - Air spring - Google Patents

Air spring Download PDF

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JP2007040489A
JP2007040489A JP2005227391A JP2005227391A JP2007040489A JP 2007040489 A JP2007040489 A JP 2007040489A JP 2005227391 A JP2005227391 A JP 2005227391A JP 2005227391 A JP2005227391 A JP 2005227391A JP 2007040489 A JP2007040489 A JP 2007040489A
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Prior art keywords
piston
vehicle body
width direction
air spring
diaphragm
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JP4640964B2 (en
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Yoichi Kakiuchi
洋一 垣内
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/126—Mounting of pneumatic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B60G2204/4502—Stops limiting travel using resilient buffer
    • 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 provide an air spring improving the durability of a diaphragm by avoiding the collision of a stopper against a diaphragm part on the inside in the width direction of a vehicle body when a vehicle body rolls. <P>SOLUTION: The air spring comprises the diaphragm 1, an upper plate 2, and a piston 3 whose upper end 6 is mounted to the lower end 1B of the diaphragm 1 while a mounting part 7 on the lower end 3B side is mounted to an axle S. The stopper 8 limiting the relative displacement of the piston 3 and upper plate 2 is provided in a state of projecting into a gas chamber H in the diaphragm 1 from the upper end 9 of the piston 3, and the mounting part 6 is located deviating to the width direction inner side D1 of the vehicle body F with respect to an axis O2 of the piston 3 so that the axis O2 of the piston 3 is located deviating to the width direction outer side D2 of the vehicle body F with respect to the axis O1 of the upper plate 2 in the assembled state of mounting the upper plate 2 to the vehicle body F and mounting the mounting part 6 of the piston 3 to the axis S. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、
気体室の壁部を構成する円筒状のダイヤフラムと、前記ダイヤフラムの上端に固定されて車体に取付けられるアッパープレートと、上端部が前記ダイヤフラムの下端に取付けられるとともに、下端側の取付け部が車軸に取付けられるピストンとを備え、前記ピストンとアッパープレートとの相対変位を制限するストッパが、前記ピストンの上端部から前記気体室に突出した状態に設けられている空気ばねに関する。 The present invention
A cylindrical diaphragm constituting the wall portion of the gas chamber, an upper plate fixed to the upper end of the diaphragm and attached to the vehicle body, an upper end portion attached to the lower end of the diaphragm, and an attachment portion on the lower end side attached to the axle The present invention relates to an air spring provided with a piston to be attached and provided with a stopper that restricts relative displacement between the piston and the upper plate so as to protrude from an upper end portion of the piston into the gas chamber.

この種の空気ばねは、バスやトラックにおける車体と車軸との間に介在している。そして、ダイヤフラム内への空気の出し入れ機能を設けることで、防振効果に加え、積載重量が変わっても車高を一定に保つことができる等、種々の特有の作用・効果を奏する。   This type of air spring is interposed between a vehicle body and an axle in a bus or truck. By providing the function of taking air into and out of the diaphragm, in addition to the anti-vibration effect, the vehicle height can be kept constant even when the load weight changes, and various unique actions and effects are exhibited.

従来、上記の空気ばねでは、図７，図８に示すように、アッパープレート２の軸芯Ｏ１と、ピストン３の軸芯Ｏ２と、ストッパ８の上下方向に沿う軸芯（縦軸芯）Ｏ３と、車体の幅方向Ｄにおけるピストン３の取付け部７の中心Ｐとが同一位置に位置し、アッパープレート２が車体に、ピストン３の取付け部７が車軸に取付けられた組付け状態でも各軸芯Ｏ１〜Ｏ３，Ｐの位置関係に変わりがなかった。符号５は上側取付けボルト、２０は下側取付けボルトである。   Conventionally, in the above-described air spring, as shown in FIGS. 7 and 8, the axis O1 of the upper plate 2, the axis O2 of the piston 3, and the axis (vertical axis) O3 along the vertical direction of the stopper 8 are provided. And the center P of the mounting portion 7 of the piston 3 in the width direction D of the vehicle body are located at the same position, and each shaft is in the assembled state in which the upper plate 2 is mounted on the vehicle body and the mounting portion 7 of the piston 3 is mounted on the axle. There was no change in the positional relationship between the cores O1 to O3 and P. Reference numeral 5 is an upper mounting bolt, and 20 is a lower mounting bolt.

上記の空気ばねを備えた車両の車体がロールすると、図７において符号Ｔで示す方向にピストン３の上端部が位置変更して、ストッパ８が車体の幅方向内方側Ｄ１のダイヤフラム部分３０に向かう。上記従来の構造によれば前記組付け状態で、アッパープレート２の軸芯Ｏ１と、ピストン３の軸芯Ｏ２と、ストッパ８の上下方向に沿う軸芯（縦軸芯）Ｏ３と、ピストン３の取付け部７の中心Ｐとが同一位置に位置していたために、車体の幅方向内方側Ｄ１のストッパ部分８Ａと、車体の幅方向内方側Ｄ１のダイヤフラム部分３０との距離が短くて、車体のロール時に前記ストッパ部分８Ａがダイヤフラム部分３０に衝突することがあった。   When the vehicle body of the vehicle equipped with the air spring rolls, the position of the upper end of the piston 3 is changed in the direction indicated by the symbol T in FIG. 7, and the stopper 8 is placed on the diaphragm portion 30 on the inner side D1 in the width direction of the vehicle body. Head. According to the conventional structure, in the assembled state, the shaft core O1 of the upper plate 2, the shaft core O2 of the piston 3, the shaft core (vertical shaft core) O3 along the vertical direction of the stopper 8, and the piston 3 Since the center P of the mounting portion 7 is located at the same position, the distance between the stopper portion 8A on the vehicle body width direction inner side D1 and the vehicle body width direction inner side D1 diaphragm portion 30 is short, The stopper portion 8A sometimes collides with the diaphragm portion 30 when the vehicle body is rolled.

本発明の目的は、車体のロール時にストッパが車体の幅方向内方側のダイヤフラム部分に衝突するのを回避できて、ダイヤフラムの耐久性を向上させることができる空気ばねを提供する点にある。   An object of the present invention is to provide an air spring that can prevent the stopper from colliding with a diaphragm portion on the inner side in the width direction of the vehicle body when the vehicle body is rolled, and can improve the durability of the diaphragm.

本発明の特徴は、
気体室の壁部を構成する円筒状のダイヤフラムと、前記ダイヤフラムの上端に固定されて車体に取付けられるアッパープレートと、上端部が前記ダイヤフラムの下端に取付けられるとともに、下端側の取付け部が車軸に取付けられるピストンとを備え、前記ピストンとアッパープレートとの相対変位を制限するストッパが、前記ピストンの上端部から前記気体室に突出した状態に設けられている空気ばねであって、
前記アッパープレートが前記車体に、前記ピストンの取付け部が前記車軸に取付けられた組付け状態で、前記ピストンの軸芯が前記アッパープレートの軸芯に対して前記車体の幅方向外方側に偏って位置するように、前記取付け部が前記ピストンの軸芯に対して前記車体の幅方向内方側に偏って位置している点にある。（請求項１） The feature of the present invention is that
A cylindrical diaphragm constituting the wall portion of the gas chamber, an upper plate fixed to the upper end of the diaphragm and attached to the vehicle body, an upper end portion attached to the lower end of the diaphragm, and an attachment portion on the lower end side attached to the axle An air spring provided with a piston to be attached, and a stopper that restricts relative displacement between the piston and the upper plate is provided in a state protruding from the upper end of the piston into the gas chamber,
With the upper plate attached to the vehicle body and the piston mounting portion attached to the axle, the piston core is biased outward in the width direction of the vehicle body with respect to the upper plate axis. The mounting portion is positioned so as to be biased inward in the width direction of the vehicle body with respect to the axial center of the piston. (Claim 1)

上記の構成によれば、アッパープレートが車体に、ピストンの取付け部が車軸に取付けられた組付け状態で、ピストンの軸芯がアッパープレートの軸芯に対して車体の幅方向外方側に偏って位置するから、車体の幅方向内方側のダイヤフラム部分に対してストッパを車体の幅方向外方側に遠ざけることができる。これにより、車体のロールに伴って、ストッパが車体の幅方向内方側のダイヤフラム部分に向かっても、車体の幅方向内方側のストッパ部分が前記ダイヤフラム部分に衝突しにくくなる。（請求項１）   According to the above configuration, in the assembled state in which the upper plate is attached to the vehicle body and the piston mounting portion is attached to the axle, the piston shaft core is biased outward in the width direction of the vehicle body with respect to the upper plate shaft core. Therefore, the stopper can be moved away from the outer side in the width direction of the vehicle body with respect to the diaphragm portion on the inner side in the width direction of the vehicle body. Accordingly, even when the stopper is directed toward the diaphragm portion on the inner side in the width direction of the vehicle body with the roll of the vehicle body, the stopper portion on the inner side in the width direction of the vehicle body is less likely to collide with the diaphragm portion. (Claim 1)

本発明において、
前記取付け部は、前記車体の幅方向に間隔を空けて位置する一対のボルト挿通孔を備えた取付け板から成り、前記車体の幅方向で前記一対のボルト挿通孔の間の中心を、前記ピストンの軸芯に対して前記車体の幅方向内方側に偏って位置させることで、前記組付け状態で、前記ピストンの軸芯が前記アッパープレートの軸芯に対して前記車体の幅方向外方側に偏って位置するよう構成されていると、取付け部の簡単な改造で上記の作用を奏することができるようになる。（請求項２） In the present invention,
The mounting portion includes a mounting plate having a pair of bolt insertion holes positioned at an interval in the width direction of the vehicle body, and the piston between the center of the pair of bolt insertion holes in the width direction of the vehicle body. In the assembled state, the shaft core of the piston is positioned outwardly in the width direction of the vehicle body with respect to the shaft core of the upper plate. When configured so as to be biased to the side, the above-described action can be achieved with a simple modification of the mounting portion. (Claim 2)

本発明において、
前記一対のボルト挿通孔に一対の下向きの取付けボルトが各別に挿通されて前記取付けボルトの頭部が前記取付け板に固着されていると、取付けボルトと取付け板が一体化するから、車軸に対する取付け板の取付け作業を簡単化できる。（請求項３） In the present invention,
When a pair of downward mounting bolts are inserted into the pair of bolt insertion holes and the heads of the mounting bolts are fixed to the mounting plate, the mounting bolt and the mounting plate are integrated. The board installation work can be simplified. (Claim 3)

本発明において、
前記ストッパの上下方向に沿う軸芯が、前記ピストンの軸芯に対して前記車体の幅方向外方側に偏って位置していると、車体の幅方向内方側のダイヤフラム部分に対してストッパを車体の幅方向外方側に、より遠ざけることができる。これにより、車体のロールに伴って、ストッパが車体の幅方向内方側のダイヤフラム部分に向かっても、車体の幅方向内方側のストッパ部分が前記ダイヤフラム部分に、より衝突しにくくなる。（請求項４） In the present invention,
When the axial center along the vertical direction of the stopper is located on the outer side in the width direction of the vehicle body with respect to the axial center of the piston, the stopper against the diaphragm portion on the inner side in the width direction of the vehicle body Can be moved further outward in the width direction of the vehicle body. Thus, even when the stopper is directed toward the diaphragm portion on the inner side in the width direction of the vehicle body, the stopper portion on the inner side in the width direction of the vehicle body is less likely to collide with the diaphragm portion as the roll of the vehicle body is performed. (Claim 4)

本発明においては、低床式の車両のサスペンションとして用いられる空気ばねに構成することができる。この構成の作用・効果を図面に基づいて説明する。図６に示すように、低床式ではない通常の車両の場合、車体Ｆの通路部の床面部２３ａと車軸Ｓの間に空気ばねＡが配置され、車体のロール中心Ｂ１と空気ばねＡとがほぼ同じ高さに位置している。ところが低床式の車両では、図５に示すように、車体の通路部２３の位置が低いことから、通路床面部２３ａと車軸Ｓとの間には空気ばねＡを配置するだけのスペースを確保できず、通路床面部２３ａの側方のタイヤハウス２４内において車軸Ｓにブラケット２２を設け、空気ばねＡはブラケット２２に載置された状態でタイヤハウス２４の床面部２４ａを弾性支持するよう構成される。これにより、ロール中心Ｂ２と空気ばねＡとの間にかなりの高低差が生じ、車体Ｆがロールしたときは、空気ばねＡは横方向に、通常の車両の場合よりも大きく変形することになる。このように空気ばねＡが横方向に大きく変形すると、車体のロール時に、車体の幅方向内方側のストッパ部分が、車体の幅方向内方側のダイヤフラム部分に衝突しやすいという問題がある。このような低床式の車両のサスペンションとして本発明の空気ばねを用いると、上記の低床式の車両で生じていた問題を解消することができる。（請求項５）   In this invention, it can comprise in the air spring used as a suspension of a low floor type vehicle. The operation and effect of this configuration will be described with reference to the drawings. As shown in FIG. 6, in the case of a normal vehicle that is not a low-floor type, an air spring A is disposed between the floor surface portion 23a of the passage portion of the vehicle body F and the axle S, and the roll center B1 of the vehicle body and the air spring A Are located at almost the same height. However, in the low-floor type vehicle, as shown in FIG. 5, the position of the passage portion 23 of the vehicle body is low, so that a space sufficient to arrange the air spring A is secured between the passage floor portion 23a and the axle S. The bracket 22 is provided on the axle shaft S in the tire house 24 on the side of the passage floor surface portion 23a, and the air spring A is configured to elastically support the floor surface portion 24a of the tire house 24 while being mounted on the bracket 22. Is done. As a result, a considerable difference in height occurs between the roll center B2 and the air spring A, and when the vehicle body F rolls, the air spring A is deformed in the lateral direction to a greater extent than in a normal vehicle. . When the air spring A is greatly deformed in the lateral direction as described above, there is a problem that the stopper portion on the inner side in the width direction of the vehicle body easily collides with the diaphragm portion on the inner side in the width direction of the vehicle body when the vehicle body is rolled. When the air spring of the present invention is used as a suspension for such a low floor type vehicle, the above-described problem that has occurred in the low floor type vehicle can be solved. (Claim 5)

本発明によれば、車体のロール時にストッパが車体の幅方向内方側のダイヤフラム部分に衝突するのを回避できて、ダイヤフラムの耐久性を向上させることができる空気ばねを提供することができた。   According to the present invention, it is possible to provide an air spring that can prevent the stopper from colliding with the diaphragm portion on the inner side in the width direction of the vehicle body when rolling the vehicle body, and can improve the durability of the diaphragm. .

以下、本発明を実施するための最良の形態を図面に基づいて説明する。図５に、低床式バス（低床式の車両の一例）の車体Ｆと車軸Ｓの間に介在する空気ばねＡを示してある。符号２３は通路部、２３ａは通路床面部、２４はタイヤハウス、２４ａはタイヤハウスの床面部、Ｂ２はロール中心である。   Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 5 shows an air spring A interposed between a vehicle body F and an axle S of a low floor bus (an example of a low floor vehicle). Reference numeral 23 is a passage portion, 23a is a passage floor surface portion, 24 is a tire house, 24a is a floor surface portion of the tire house, and B2 is a roll center.

図１，図２，図３に示すように前記空気ばねＡは、気体室Ｈの壁部を構成する縦形円筒状のダイヤフラム１と、ダイヤフラム１の上端１Ａにこの上端１Ａと同芯状にかしめ固定されて車体Ｆに取付けられる円板状のアッパープレート２と、上端部６がダイヤフラム１の下端１Ｂにこの下端１Ｂと同芯状に取付けられるとともに、下端３Ｂ側の取付け部７が車軸Ｓに取付けられるピストン３とを備えている。また、ピストン３とアッパープレート２との相対変位を制限する（ダイヤフラム１の変形を制限する）ゴム製のストッパ８が、ピストン３の上端部６から気体室Ｈに突出した状態に設けられている。前記アッパープレート２は、詳しくは図５に示すように、車体Ｆへの取付け用ブラケット２１を介して車体Ｆに取付けられ、ピストン３は、車軸Ｓへの取付け用ブラケット２２を介して車軸Ｓに取付けられる。   As shown in FIGS. 1, 2, and 3, the air spring A includes a vertical cylindrical diaphragm 1 that forms a wall portion of the gas chamber H, and an upper end 1 </ b> A of the diaphragm 1 that is caulked concentrically with the upper end 1 </ b> A. A disk-like upper plate 2 fixed to the vehicle body F and an upper end 6 are attached to the lower end 1B of the diaphragm 1 concentrically with the lower end 1B, and an attachment 7 on the lower end 3B side is attached to the axle S. And a piston 3 to be attached. Further, a rubber stopper 8 that restricts relative displacement between the piston 3 and the upper plate 2 (limits deformation of the diaphragm 1) is provided in a state protruding from the upper end portion 6 of the piston 3 to the gas chamber H. . As shown in detail in FIG. 5, the upper plate 2 is attached to the vehicle body F via a mounting bracket 21 to the vehicle body F, and the piston 3 is attached to the axle S via a mounting bracket 22 to the axle S. Mounted.

アッパープレート２は、ダイヤフラム１内への空気給排孔４と、車体Ｆへの取付け用ブラケット２１に対する上側取付ボルト５とを備えている。   The upper plate 2 includes an air supply / exhaust hole 4 into the diaphragm 1 and an upper mounting bolt 5 for a mounting bracket 21 to the vehicle body F.

ピストン３は、上窄まりのテーパー筒状のピストン本体１０と、このピストン本体１０の上端側の開口部１１に底部が嵌合した円形皿状のロアシート１２とを備え、ロアシート１２の上端側のフランジ部１３とピストン本体１０の開口部１１とでダイヤフラム１の下端１Ｂを挟持固定している。ピストン本体１０の上端部には、下側のダイヤフラム部分１４（下端部１４）が裏返って被さっている。すなわち、ダイヤフラム１に対してピストン３を上向きに押し込んだようにダイヤフラム１の下端部１４が内側に折り返されている。ロアシート１２と、ピストン本体１０の開口部１１と、ピストン本体１０の上端部とはピストン３の上端部６を構成する。   The piston 3 includes a tapered cylindrical piston body 10 with a constricted top, and a circular dish-shaped lower sheet 12 whose bottom is fitted to the opening 11 on the upper end side of the piston body 10, and on the upper end side of the lower sheet 12. The flange 13 and the opening 11 of the piston body 10 sandwich and fix the lower end 1B of the diaphragm 1. A lower diaphragm portion 14 (lower end portion 14) is turned over and covers the upper end portion of the piston body 10. That is, the lower end portion 14 of the diaphragm 1 is folded inward so that the piston 3 is pushed upward with respect to the diaphragm 1. The lower seat 12, the opening 11 of the piston main body 10, and the upper end of the piston main body 10 constitute an upper end 6 of the piston 3.

ピストン本体１０とロアシート１２とは同芯で、ロアシート１２の下面に、ピストン本体１０内に位置する下側ブラケット１５の上面が固着され、ロアシート１２の上面に上側ブラケット１６の下面が固着されている。ロアシート１２の上面から立ち上がった上側ブラケット１６の上端部に、上下一対の第１取付け板１７が互いに重合した状態で固着されている。図３に示すように下側の第１取付け板１７は長円形である。   The piston body 10 and the lower sheet 12 are concentric, and the upper surface of the lower bracket 15 located in the piston body 10 is fixed to the lower surface of the lower sheet 12, and the lower surface of the upper bracket 16 is fixed to the upper surface of the lower sheet 12. . A pair of upper and lower first mounting plates 17 are fixed to the upper end of the upper bracket 16 rising from the upper surface of the lower sheet 12 in a state where they are overlapped with each other. As shown in FIG. 3, the lower first mounting plate 17 has an oval shape.

図４に示すように、アッパープレート２が車体Ｆに、ピストン３の取付け部７が車軸Ｓに取付けられた組付け状態で、ピストン３の軸芯Ｏ２がアッパープレート２の軸芯Ｏ１に対して車体Ｆの幅方向外方側Ｄ２に偏って位置するように、取付け部７がピストン３の軸芯Ｏ２に対して車体Ｆの幅方向内方側Ｄ１に偏って位置している。前記取付け部７は、下側ブラケット１５の下面に固着された長方形状の第２取付け板１９（取付け板に相当）から成る。この第２取付け板１９は、車体Ｆの幅方向Ｄに間隔を空けて位置する一対のボルト挿通孔３３を備えている。そして、車体Ｆの幅方向Ｄで一対のボルト挿通孔３３の間の中心Ｐを、ピストン３の軸芯Ｏ２に対して車体Ｆの幅方向内方側Ｄ１に長さＬ１（偏位量）だけ偏って位置させることで、前記組付け状態で、ピストン３の軸芯Ｏ２がアッパープレート２の軸芯Ｏ１に対して車体Ｆの幅方向外方側Ｄ２に偏って位置するよう構成されている。一対のボルト挿通孔３３には一対の下向きの下側取付けボルト２０が各別に挿通されて、下側取付けボルト２０の頭部２０Ａが第２取付け板１９に固着されている。一対の下側取付けボルト２０は車軸Ｓへの取付け用ブラケット２２側の雌ねじ部に螺合連結する。   As shown in FIG. 4, in the assembled state in which the upper plate 2 is attached to the vehicle body F and the attachment portion 7 of the piston 3 is attached to the axle S, the axial core O2 of the piston 3 is relative to the axial core O1 of the upper plate 2. The mounting portion 7 is located on the inner side D1 in the width direction of the vehicle body F with respect to the axial center O2 of the piston 3 so as to be located on the outer side D2 in the width direction of the vehicle body F. The mounting portion 7 includes a rectangular second mounting plate 19 (corresponding to a mounting plate) fixed to the lower surface of the lower bracket 15. The second mounting plate 19 includes a pair of bolt insertion holes 33 that are spaced from each other in the width direction D of the vehicle body F. The center P between the pair of bolt insertion holes 33 in the width direction D of the vehicle body F is a length L1 (deviation amount) on the inner side D1 in the width direction of the vehicle body F with respect to the axis O2 of the piston 3. By being offset, the shaft core O2 of the piston 3 is configured to be biased to the width direction outer side D2 of the vehicle body F with respect to the shaft core O1 of the upper plate 2 in the assembled state. A pair of downward lower mounting bolts 20 are individually inserted into the pair of bolt insertion holes 33, and the head portion 20 </ b> A of the lower mounting bolt 20 is fixed to the second mounting plate 19. The pair of lower mounting bolts 20 are screwed and connected to the female thread portion on the mounting bracket 22 side to the axle shaft S.

図１，図３に示すように前記ストッパ８は、車体Ｆの幅方向内方側Ｄ１側が除去された上窄まりの円錐台状に形成されており、ストッパ８の上下方向に沿う軸芯Ｏ３が、ピストン３の軸芯Ｏ２に対して車体Ｆの幅方向外方側Ｄ２に長さＬ２（偏位量）だけ偏って位置している。そして、ストッパ８の下面に加硫接着された薄板３１が上下一対の第１取付け板１７に重合してボルト固定されている。   As shown in FIGS. 1 and 3, the stopper 8 is formed in a truncated conical shape from which the width direction inner side D1 side of the vehicle body F is removed, and the axis O3 along the vertical direction of the stopper 8 is formed. However, the length L2 (deviation amount) is offset from the axial center O2 of the piston 3 on the outer side D2 in the width direction of the vehicle body F. The thin plate 31 vulcanized and bonded to the lower surface of the stopper 8 is superposed on the pair of upper and lower first mounting plates 17 and fixed with bolts.

上記の構成によれば、車体Ｆの幅方向内方側Ｄ１のダイヤフラム部分３０に対してストッパ８を車体Ｆの幅方向外方側Ｄ２に遠ざけることができる。これにより、車体Ｆのロールに伴って、ストッパ８が車体Ｆの幅方向内方側Ｄ１のダイヤフラム部３０に向かっても、車体Ｆの幅方向内方側Ｄ１のストッパ部分８Ａが前記ダイヤフラム部分３０に衝突しにくくなる。   According to the above configuration, the stopper 8 can be moved away from the width direction outer side D2 of the vehicle body F with respect to the diaphragm portion 30 on the width direction inner side D1 of the vehicle body F. Thus, the stopper portion 8A on the width direction inner side D1 of the vehicle body F is moved toward the diaphragm portion 30 even when the stopper 8 faces the diaphragm portion 30 on the width direction inner side D1 of the vehicle body F along with the roll of the vehicle body F. It becomes difficult to collide with.

［別実施形態］
本発明の空気ばねを低床式以外の車両のサスペンションとしても用いてもよい。 [Another embodiment]
The air spring of the present invention may be used as a suspension for vehicles other than the low floor type.

空気ばねの縦断面図Air spring longitudinal section 空気ばねの底面図Bottom view of air spring 空気ばねの平面図Air spring top view 組付け状態の空気ばねの縦断面図Longitudinal section of the assembled air spring 空気ばねの取付け構造を示す図Diagram showing the mounting structure of the air spring 従来の空気ばねの取付け構造を示す図A diagram showing a conventional air spring mounting structure 従来の空気ばねの縦断面図Vertical section of a conventional air spring 従来の空気ばねの底面図Bottom view of conventional air spring

符号の説明Explanation of symbols

１ ダイヤフラム（壁部）
１Ａ 上端（ダイヤフラムの上端）
１Ｂ 下端（ダイヤフラムの下端）
２ アッパープレート
３ ピストン
３Ｂ 下端（ピストンの下端）
４ 空気給排孔
５ 上側取付ボルト
６ 上端部（ピストンの上端部）
７ 取付け部
８ ストッパ
８Ａ 車体の幅方向内方側のストッパ部分
１０ ピストン本体
１１ 開口部
１２ ロアシート
１３ フランジ部（ロアシートのフランジ部）
１４ 下側のダイヤフラム部分
１５ 下側ブラケット
１６ 上側ブラケット
１７ 第１取付け板
１９ 第２取付け板（取付け板）
２０，２０ 下側取付けボルト（取付けボルト）
２０Ａ，２０Ａ 下側取付けボルトの頭部
２１ 車体への取付け用ブラケット
２２ 車軸への取付け用ブラケット
２３ 通路部
２３ａ 通路床面部
２４ タイヤハウス
２４ａ タイヤハウスの床面部
３０ 車体の幅方向内方側のダイヤフラム部分
３１ 薄板
３３，３３ ボルト挿通孔
Ｂ１ ロール中心（低床式以外の車両のロール中心）
Ｂ２ ロール中心（低床式車両のロール中心）
Ｄ 車体の幅方向
Ｄ１ 車体の幅方向内方側
Ｄ２ 車体の幅方向外方側
Ｆ 車体
Ｈ 気体室
Ｌ１ 長さ（偏位量）
Ｌ２ 長さ（偏位量）
Ｏ１ アッパープレートの軸芯
Ｏ２ ピストンの軸芯
Ｏ３ ストッパの上下方向に沿う軸芯
Ｐ 一対のボルト挿通孔の間の中心（第２取付け部の中心）
Ｓ 車軸
Ｔ ピストンの上端部の変位方向 1 Diaphragm (wall)
1A Upper end (upper end of diaphragm)
1B Lower end (lower end of diaphragm)
2 Upper plate 3 Piston 3B Lower end (lower end of piston)
4 Air supply / discharge holes
5 Upper mounting bolt 6 Upper end (upper end of piston)
7 Attaching portion 8 Stopper 8A Stop portion 10 on the inner side in the width direction of the vehicle body Piston body 11 Opening portion 12 Lower seat 13 Flange portion (lower seat flange portion)
14 Lower diaphragm portion 15 Lower bracket 16 Upper bracket 17 First mounting plate 19 Second mounting plate (mounting plate)
20, 20 Lower mounting bolt (Mounting bolt)
20A, 20A Lower mounting bolt head 21 Car body mounting bracket 22 Axle mounting bracket 23 Passage portion 23a Passage floor surface portion 24 Tire house 24a Tire house floor surface portion 30 Diaphragm on the inner side in the width direction of the vehicle body Portion 31 Thin plate 33, 33 Bolt insertion hole B1 Roll center (roll center of vehicles other than low floor type)
B2 Roll center (Roll center of low-floor type vehicle)
D Car body width direction D1 Car body width direction inner side D2 Car body width direction outer side F Car body H Gas chamber L1 Length (deviation amount)
L2 length (deviation amount)
O1 Upper plate axis O2 Piston axis O3 Axis core P in the vertical direction of the stopper Center between the pair of bolt insertion holes (center of the second mounting portion)
S Axle T Displacement direction of upper end of piston

Claims (5)

気体室の壁部を構成する円筒状のダイヤフラムと、前記ダイヤフラムの上端に固定されて車体に取付けられるアッパープレートと、上端部が前記ダイヤフラムの下端に取付けられるとともに、下端側の取付け部が車軸に取付けられるピストンとを備え、前記ピストンとアッパープレートとの相対変位を制限するストッパが、前記ピストンの上端部から前記気体室に突出した状態に設けられている空気ばねであって、
前記アッパープレートが前記車体に、前記ピストンの取付け部が前記車軸に取付けられた組付け状態で、前記ピストンの軸芯が前記アッパープレートの軸芯に対して前記車体の幅方向外方側に偏って位置するように、前記取付け部が前記ピストンの軸芯に対して前記車体の幅方向内方側に偏って位置している空気ばね。 A cylindrical diaphragm constituting the wall portion of the gas chamber, an upper plate fixed to the upper end of the diaphragm and attached to the vehicle body, an upper end portion attached to the lower end of the diaphragm, and an attachment portion on the lower end side attached to the axle An air spring provided with a piston to be attached, and a stopper that restricts relative displacement between the piston and the upper plate is provided in a state protruding from the upper end of the piston into the gas chamber,
With the upper plate attached to the vehicle body and the piston mounting portion attached to the axle, the piston core is biased outward in the width direction of the vehicle body with respect to the upper plate axis. The air spring is positioned so that the mounting portion is biased inward in the width direction of the vehicle body with respect to the axial center of the piston. 前記取付け部は、前記車体の幅方向に間隔を空けて位置する一対のボルト挿通孔を備えた取付け板から成り、前記車体の幅方向で前記一対のボルト挿通孔の間の中心を、前記ピストンの軸芯に対して前記車体の幅方向内方側に偏って位置させることで、前記組付け状態で、前記ピストンの軸芯が前記アッパープレートの軸芯に対して前記車体の幅方向外方側に偏って位置するよう構成されている請求項１記載の空気ばね。   The mounting portion includes a mounting plate having a pair of bolt insertion holes positioned at an interval in the width direction of the vehicle body, and the piston between the center of the pair of bolt insertion holes in the width direction of the vehicle body. In the assembled state, the shaft core of the piston is positioned outwardly in the width direction of the vehicle body with respect to the shaft core of the upper plate. The air spring according to claim 1, wherein the air spring is configured to be biased to the side. 前記一対のボルト挿通孔に一対の下向きの取付けボルトが各別に挿通されて前記取付けボルトの頭部が前記取付け板に固着されている請求項２記載の空気ばね。   The air spring according to claim 2, wherein a pair of downward mounting bolts are inserted into the pair of bolt insertion holes, respectively, and a head portion of the mounting bolt is fixed to the mounting plate. 前記ストッパの上下方向に沿う軸芯が、前記ピストンの軸芯に対して前記車体の幅方向外方側に偏って位置している請求項１〜３のいずれか一つに記載の空気ばね。   The air spring according to any one of claims 1 to 3, wherein an axial core along the up-down direction of the stopper is located on the outer side in the width direction of the vehicle body with respect to the axial center of the piston. 低床式の車両のサスペンションとして用いられる請求項１〜４のいずれか一つに記載の空気ばね。   The air spring according to any one of claims 1 to 4, which is used as a suspension for a low-floor type vehicle.
JP2005227391A 2005-08-05 2005-08-05 Air spring Active JP4640964B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016125541A (en) * 2014-12-26 2016-07-11 東洋ゴム工業株式会社 Air spring
JP2019049278A (en) * 2017-09-08 2019-03-28 Ｔｏｙｏ Ｔｉｒｅ株式会社 Air spring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182512A (en) * 1989-01-10 1990-07-17 Atsugi Unisia Corp Pneumatic suspension
JPH0893822A (en) * 1994-09-29 1996-04-12 Nissan Diesel Motor Co Ltd Air spring device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02182512A (en) * 1989-01-10 1990-07-17 Atsugi Unisia Corp Pneumatic suspension
JPH0893822A (en) * 1994-09-29 1996-04-12 Nissan Diesel Motor Co Ltd Air spring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016125541A (en) * 2014-12-26 2016-07-11 東洋ゴム工業株式会社 Air spring
JP2019049278A (en) * 2017-09-08 2019-03-28 Ｔｏｙｏ Ｔｉｒｅ株式会社 Air spring

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