JP5513946B2 - Vehicle suspension system - Google Patents

Vehicle suspension system Download PDF

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JP5513946B2
JP5513946B2 JP2010062126A JP2010062126A JP5513946B2 JP 5513946 B2 JP5513946 B2 JP 5513946B2 JP 2010062126 A JP2010062126 A JP 2010062126A JP 2010062126 A JP2010062126 A JP 2010062126A JP 5513946 B2 JP5513946 B2 JP 5513946B2
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notch
suspension arm
intermediate beam
suspension
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JP2011194963A (en
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健二 楠
俊哉 辻田
賢次 黒田
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Daihatsu Motor Co Ltd
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Description

本発明は、左，右のサスペンションアームと、該左，右のサスペンションアームを結合する中間ビームとを備えた車両のサスペンション装置に関する。   The present invention relates to a vehicle suspension apparatus including left and right suspension arms and an intermediate beam that couples the left and right suspension arms.

車両のサスペンション装置において、左，右のサスペンションアームに中間ビームを架け渡して連結する構造として、従来、例えば、特許文献１に記載されたものがある。この従来構造では、中間ビームは、車体下側に開口した横断面略Ｖ字形状又は略Ｕ字形状を成しており、前記中間ビームの端部には、サスペンションアームの外周面に応じた形状の切欠き部が形成され、該切欠き部が前記サスペンションアームに溶接され、さらに前記中間ビームと前記サスペンションアームとの溶接部の上面にガセットが溶接されている。   Conventionally, for example, Patent Document 1 discloses a structure in which an intermediate beam is bridged and connected to left and right suspension arms in a vehicle suspension device. In this conventional structure, the intermediate beam has a substantially V-shaped or substantially U-shaped cross section that opens to the lower side of the vehicle body, and the end of the intermediate beam has a shape corresponding to the outer peripheral surface of the suspension arm. A notch is formed, the notch is welded to the suspension arm, and a gusset is welded to the upper surface of the weld between the intermediate beam and the suspension arm.

特開２００５−８１２３号公報JP 2005-8123 A

ところで、前記特許文献１のようにサスペンションアームの一端を車体に軸支し、他端で車輪を支持する構造では、車輪からサスペンションアームを介して中間ビームの端部に伝わる荷重は、車輪に近い側の溶接部に大きく働くこととなる。従って、前記中間ビームの端部に形成された単純な形状の切欠き部をサスペンションアームに溶接するだけでは、前記中間ビームへの、前記切欠き部の車輪に近い部分からの荷重と遠い部分からの荷重とに差が生じるため前記中間ビームが安定して変形せず、安定した捩り性能を確保できない。   Incidentally, in the structure in which one end of the suspension arm is pivotally supported on the vehicle body and the wheel is supported at the other end as in Patent Document 1, the load transmitted from the wheel to the end of the intermediate beam via the suspension arm is close to the wheel. It will work greatly on the side welds. Therefore, by simply welding a notch of a simple shape formed at the end of the intermediate beam to the suspension arm, the load from the portion near the wheel of the notch to the intermediate beam and the portion far from the wheel Therefore, the intermediate beam is not stably deformed and stable torsion performance cannot be ensured.

また、前記中間ビームと前記サスペンションアームとの溶接部の上面に前記ガセットを溶接しているので取付け剛性は強いが、コストの増加，組付け性の悪化，及び重量の増加を招いている。   Further, since the gusset is welded to the upper surface of the welded portion between the intermediate beam and the suspension arm, the mounting rigidity is strong, but the cost is increased, the assembling property is deteriorated, and the weight is increased.

本発明は、前記従来の状況に鑑みてなされたもので、安定した中間ビームの捩り性能を確保できる車両のサスペンション装置を提供することを課題としている。   The present invention has been made in view of the above-described conventional situation, and it is an object of the present invention to provide a vehicle suspension apparatus that can ensure stable torsion performance of an intermediate beam.

請求項１の発明は、一端が車体に揺動可能に支持され、他端に車輪を回転可能に支持する左，右一対のサスペンションアームと、該左，右一対のサスペンションアームに架け渡す様に車幅方向に向けて配設された中間ビームとを備え、前記中間ビームの横断面形状は、車両側方視で、下方又は上方に開口する略Ｖ字形状又は略Ｕ字形状を成し、前記中間ビームの両端部には切欠き部が形成され、該切欠き部が前記サスペンションアームの外周面に溶接された車両のサスペンション装置において、
前記サスペンションアームはパイプ状に形成されており、
前記切欠き部は、前記サスペンションアームの外周面に沿うと共に車両側方視で、車両前後方向に間隔をあけて、かつ前記サスペンションアームの中心線を上下に跨ぐ様に配設された第１切欠き部及び第２切欠き部を有し、前記車輪に近い側に位置する前記第１切欠き部の前記サスペンションアームの外周面への当接長を前記車輪に遠い側に位置する前記第２切欠き部の当接長より長く形成し、前記第１，第２切欠き部をサスペンションアームの外周面に溶接し、
前記中間ビームの両端部の、前記第１切欠き部と前記第２切欠き部との境界に位置する境界部を、車両上方視で、前記サスペンションアームの中心線より車両外方側に、かつパイプ外表面に沿う様に溶接し、
前記第１切欠き部，前記第２切欠き部の前記中心線を挟んで前記境界部の反対側に位置する前記第１切欠き端部，第２切欠き端部を、車両上方視で、前記サスペンションアームの、前記中心線より車両内方部分に溶接した
ことを特徴としている。 According to the first aspect of the present invention, a pair of left and right suspension arms, one end of which is swingably supported by the vehicle body and the other end of which is rotatably supported by the wheel, and the pair of left and right suspension arms are bridged. An intermediate beam arranged in the vehicle width direction, and the cross-sectional shape of the intermediate beam is substantially V-shaped or substantially U-shaped opening in the downward or upward direction when viewed from the side of the vehicle. In the vehicle suspension apparatus, notches are formed at both ends of the intermediate beam, and the notches are welded to the outer peripheral surface of the suspension arm.
The suspension arm is formed in a pipe shape,
The cutout portion is a first cutout that is disposed along the outer peripheral surface of the suspension arm and spaced from the vehicle front-rear direction and across the center line of the suspension arm in a vehicle side view. The second portion having a notch portion and a second notch portion, and a contact length of the first notch portion located on the side closer to the wheel with the outer peripheral surface of the suspension arm located on the side farther from the wheel. Forming longer than the contact length of the notch, and welding the first and second notches to the outer peripheral surface of the suspension arm;
A boundary portion located at a boundary between the first notch portion and the second notch portion at both ends of the intermediate beam is located on the vehicle outer side from the center line of the suspension arm when viewed from above the vehicle, and Weld along the outer surface of the pipe,
The first notch portion and the second notch end portion located on the opposite side of the boundary portion across the center line of the first notch portion and the second notch portion, as viewed from above the vehicle, The suspension arm is welded to a vehicle inner part from the center line .

請求項１の発明によれば、車輪に近い側の第１切欠き部を前記車輪に遠い側の第２切欠き部より長く形成したので、前記車輪からの荷重が大きい前記第１切欠き部のサスペンションアームへの取付け剛性が前記荷重が小さい前記第２切欠き部の取付け剛性より大きくなり、その分前記車輪から中間ビームへの荷重を車両前後方向で均一化でき、前記中間ビームが安定して変形することとなり、その結果、前記中間ビームの安定した捩り性能を確保できる。   According to the first aspect of the present invention, since the first notch on the side closer to the wheel is formed longer than the second notch on the side far from the wheel, the first notch with a large load from the wheel. The suspension rigidity to the suspension arm is larger than the rigidity of the second notch with the small load, and the load from the wheel to the intermediate beam can be made uniform in the longitudinal direction of the vehicle, thereby stabilizing the intermediate beam. As a result, stable twisting performance of the intermediate beam can be ensured.

また、中間ビームの、第１切欠き部と第２切欠き部との境界に位置する境界部を、車両上方視で、前記サスペンションアームの中心線より車両外方側に溶接し、前記境界部の反対側に位置する第１，第２切欠き端部を、車両上方視で、前記サスペンションアームの中心線より車両内方部分に溶接したので、車両前後方向寸法の短い境界部については車幅方向に長くでき、車両前後方向間隔の広い第１，第２切欠き部については車幅方向に短くしたので、前記中間ビーム全体における取付け剛性の均一化を図ることができ、安定した前記中間ビームの捩り性能を確保できる。 Further, the boundary portion of the intermediate beam located at the boundary between the first notch portion and the second notch portion is welded to the vehicle outer side from the center line of the suspension arm as viewed from above the vehicle, and the boundary portion The first and second cutout ends located on the opposite side of the vehicle are welded to the vehicle inner part from the center line of the suspension arm as viewed from above the vehicle. Since the first and second cutout portions having a wide vehicle front-rear direction interval can be shortened in the vehicle width direction, the mounting rigidity of the entire intermediate beam can be made uniform, and the stable intermediate beam can be obtained. Torsional performance can be secured.

さらにまた、前記境界部を、パイプ状に形成された前記サスペンションアームの外周面に沿う様に溶接したので、前記サスペンションアームの捩れに対する前記中間ビームの取付け剛性を容易に確保できる。前記第１，第２切欠き部の第１，第２切欠き端部については、車両上方視で、前記サスペンションアームの中心より車両内方部分に溶接したので、前記中間ビームを前記サスペンションアームに容易にセットできる。その結果、ガセット等の部品点数を増やすことなく、簡易な構成で、前記中間ビームを強固に安定して取付ける事ができる
 Furthermore, since the boundary portion is welded along the outer peripheral surface of the suspension arm formed in the shape of a pipe, the mounting rigidity of the intermediate beam against the torsion of the suspension arm can be easily ensured. Since the first and second cutout end portions of the first and second cutout portions are welded from the center of the suspension arm to the vehicle inner portion as viewed from above the vehicle, the intermediate beam is attached to the suspension arm. Can be set easily. As a result, the intermediate beam can be mounted firmly and stably with a simple configuration without increasing the number of parts such as gussets.

本発明の実施例１に係るリヤサスペンション装置の平面図である。It is a top view of the rear suspension apparatus concerning Example 1 of the present invention. 前記リヤサスペンション装置のサスペンションアームと中間ビームとが溶接された状態を示す断面図（図１のII-II線拡大断面図）である。FIG. 2 is a cross-sectional view showing a state where a suspension arm and an intermediate beam of the rear suspension device are welded (an enlarged cross-sectional view taken along line II-II in FIG. 1). 中間ビームの端部を示す側面図である。It is a side view which shows the edge part of an intermediate beam. 本発明の実施例２に係る中間ビームの端部を示す側面図である。It is a side view which shows the edge part of the intermediate beam which concerns on Example 2 of this invention. 前記中間ビームとサスペンションアームとの溶接状態を示す断面側面図である。It is a cross-sectional side view which shows the welding state of the said intermediate beam and a suspension arm.

以下、本発明の実施の形態を添付図面に基づいて説明する   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１ないし図３は、本発明の実施例１によるリヤサスペンション装置を説明するための図である。なお、本実施例で前，後，左，右とは、特記なき限り車両後方から前方を見た場合の前，後，左，右を意味する。   1 to 3 are diagrams for explaining a rear suspension apparatus according to a first embodiment of the present invention. In this embodiment, front, rear, left, and right mean front, rear, left, and right when looking forward from the rear of the vehicle unless otherwise specified.

図において、１はトレーリングアーム式のリヤサスペンション装置を示している。このリヤサスペンション装置１は、車両前後方向に延びる左，右のサスペンションアーム２，２と、車幅方向に延びる中間ビーム３とを備えている。なお、前記左，右のサスペンションアーム２，２は左右対称であるので、本実施例１では、特記なき限り左のサスペンションアーム２について説明する。   In the figure, reference numeral 1 denotes a trailing arm type rear suspension device. The rear suspension device 1 includes left and right suspension arms 2 and 2 extending in the vehicle front-rear direction, and an intermediate beam 3 extending in the vehicle width direction. Since the left and right suspension arms 2 and 2 are bilaterally symmetric, in the first embodiment, the left suspension arm 2 will be described unless otherwise specified.

前記サスペンションアーム２は、例えば、高張力鋼等から成る１枚の鋼板を、プレス加工により、パイプ状に成形し、突き合わせ部を溶接したものである。   The suspension arm 2 is formed by, for example, forming a single steel plate made of high-strength steel or the like into a pipe shape by press working and welding a butt portion.

前記サスペンションアーム２は、その前端部２ａに、車体（不図示）に軸支されるブッシュ４が固定されており、このブッシュ４の軸線Ｘを中心に上下方向に揺動可能となっている。   The suspension arm 2 is fixed to a front end portion 2a thereof with a bush 4 pivotally supported by a vehicle body (not shown), and can swing up and down about an axis X of the bush 4.

前記サスペンションアーム２の後端部２ｂには、車輪５を支持するためのスピンドル軸５ａが車両外方に凸設されている。また、前記サスペンションアーム２の後端部内方２ｃには、サスペンションばね（不図示）を取付けるためのばね受け座部６が配設されている。   A spindle shaft 5a for supporting the wheel 5 is provided on the rear end 2b of the suspension arm 2 so as to protrude outward from the vehicle. Further, a spring receiving seat 6 for attaching a suspension spring (not shown) is disposed on the rear end inner side 2c of the suspension arm 2.

前記左，右のサスペンションアーム２，２には、中間ビーム３が該左，右のサスペンションアーム２，２に架け渡す様に配設されている。この中間ビーム３の横断面形状は、車両側方視で、下方に開口した略Ｖ字形状を成しており、前，後の側壁ａ，ｂを有する。   An intermediate beam 3 is disposed on the left and right suspension arms 2 and 2 so as to span the left and right suspension arms 2 and 2. The cross-sectional shape of the intermediate beam 3 is a substantially V-shape that opens downward when viewed from the side of the vehicle, and has front and rear side walls a and b.

前記中間ビーム３の左，右の端部には、切欠き部３ｂが前記サスペンションアーム２の外周面２ｄに沿う様に形成されており、前記外周面２ｄに前記切欠き部３ｂを当接させて溶接されている。   At the left and right ends of the intermediate beam 3, a notch 3b is formed along the outer peripheral surface 2d of the suspension arm 2, and the notch 3b is brought into contact with the outer peripheral surface 2d. Are welded.

詳細には、前記切欠き部３ｂは、前記前，後の側壁ａ，ｂを円弧状に切欠くことにより形成され、前記車輪５に近い側に位置する第１切欠き部３ｅと、遠い側に位置する第２切欠き部３ｄとからなる。また、前記第１，第２切欠き部３ｅ，３ｄの境界に位置し、前記略Ｖ字形状の頂部に対応する部分は境界部３ｃとなっている。   Specifically, the notch portion 3b is formed by notching the front and rear side walls a and b in a circular arc shape, and the first notch portion 3e located on the side closer to the wheel 5 and the far side And a second notch portion 3d located at the center. Further, a portion that is located at the boundary between the first and second cutout portions 3e and 3d and that corresponds to the substantially V-shaped top portion is a boundary portion 3c.

前記境界部３ｃの先端面３ａは、前記外周面２ｄに前記切欠き部３ｂを当接させた状態において、前記サスペンションアーム２の中心線Ｙより車両外方側に位置しており、前記外周面２ｄに沿う様に溶接されている。   The front end surface 3a of the boundary portion 3c is located on the vehicle outer side from the center line Y of the suspension arm 2 in a state where the notch portion 3b is in contact with the outer peripheral surface 2d, and the outer peripheral surface It is welded along 2d.

一方、前記第１，第２切欠き部３ｅ，３ｄの下端部、つまり前記中心線Ｙを挟んで前記境界部３ｃの反対側に位置する第１，第２切欠き端部３ｅ′，３ｄ′は、前記外周面２ｄに前記切欠き部３ｂを当接させた状態において、前記サスペンションアーム２の中心線Ｙより車両内方側に位置しており、前記外周面２ｄに溶接されている。より詳細には、第２切欠き端部３ｄ′は第１切欠き端部３ｅ′に比べてより大きく車両内方側に位置しており、そのため前記車輪５に近い側の前記第１切欠き部３ｅのサスペンションアーム２との当接長は、前記車輪５に遠い側の前記第２切欠き部３ｄの当接長より長くなっている。   On the other hand, lower ends of the first and second cutout portions 3e and 3d, that is, first and second cutout end portions 3e 'and 3d' located on the opposite side of the boundary portion 3c with the center line Y in between. Is located on the vehicle inner side from the center line Y of the suspension arm 2 in a state where the notch 3b is in contact with the outer peripheral surface 2d, and is welded to the outer peripheral surface 2d. More specifically, the second notch end portion 3d 'is larger than the first notch end portion 3e' and is located on the inner side of the vehicle. The contact length of the portion 3e with the suspension arm 2 is longer than the contact length of the second notch portion 3d on the side far from the wheel 5.

本実施例１によれば、車輪５に近い側の第１切欠き部３ｅを前記車輪５に遠い側の第２切欠き部３ｄより長く形成したので、前記車輪５からの荷重が大きい前記第１切欠き部３ｅのサスペンションアーム２への取付け剛性が前記荷重が小さい前記第２切欠き部３ｄの取付け剛性より大きくなり、その分前記車輪５から中間ビーム３への荷重を車両前後方向で均一化でき、前記中間ビーム３が安定して変形することとなり、その結果、前記中間ビーム３の安定した捩り性能を確保できる。   According to the first embodiment, the first notch 3e on the side close to the wheel 5 is formed longer than the second notch 3d on the side far from the wheel 5, so that the load from the wheel 5 is large. The mounting rigidity of the 1 notch 3e to the suspension arm 2 is larger than the mounting rigidity of the second notch 3d where the load is small, and the load from the wheel 5 to the intermediate beam 3 is made uniform in the longitudinal direction of the vehicle. As a result, the intermediate beam 3 is stably deformed, and as a result, stable twisting performance of the intermediate beam 3 can be ensured.

また、前記中間ビーム３の、第１切欠き部３ｅと第２切欠き部３ｄとの境界に位置する境界部３ｃを、車両上方視で、前記サスペンションアーム２の中心線Ｙより車両外方側に位置させて溶接し、前記境界部３ｃの反対側に位置する第１，第２切欠き端部３ｅ′，３ｄ′を、車両上方視で、前記サスペンションアーム２の中心線Ｙより車両内方部分に溶接したので、車両前後方向寸法の短い境界部３ｃについては車幅方向に長くでき、車両前後方向間隔の広い第１，第２切欠き部３ｅ，３ｄについては車幅方向に短くしたので、前記中間ビーム３全体における取付け剛性の均一化を図ることができ、安定した前記中間ビーム３の捩り性能を確保できる。   Further, a boundary portion 3c of the intermediate beam 3 located at the boundary between the first notch portion 3e and the second notch portion 3d is located on the vehicle outer side from the center line Y of the suspension arm 2 when viewed from above the vehicle. The first and second cut-out end portions 3e 'and 3d' located on the opposite side of the boundary portion 3c are inward of the vehicle from the center line Y of the suspension arm 2 when viewed from above the vehicle. Since the vehicle is welded to the portion, the boundary portion 3c having a short vehicle longitudinal direction dimension can be lengthened in the vehicle width direction, and the first and second cutout portions 3e and 3d having a wide vehicle longitudinal direction interval are shortened in the vehicle width direction. The mounting rigidity of the entire intermediate beam 3 can be made uniform, and stable torsion performance of the intermediate beam 3 can be ensured.

さらにまた、前記境界部３ｃを、パイプ状に形成された前記サスペンションアーム２の外周面２ｄに沿う様に溶接したので、前記サスペンションアーム２の捩れに対する前記中間ビーム３の取付け剛性を容易に確保できる。一方、前記第１，第２切欠き部３ｅ，３ｄの第１，第２切欠き端部３ｅ′，３ｄ′については、車両上方視で、前記サスペンションアーム２の中心線Ｙより車両内方部分に溶接したので、前記中間ビーム３を前記サスペンションアーム２に容易にセットできる。その結果、ガセット等の部品点数を増やすことなく、簡易な構成で、前記中間ビーム３を強固に安定して取付ける事ができる。   Furthermore, since the boundary portion 3c is welded along the outer peripheral surface 2d of the suspension arm 2 formed in a pipe shape, the mounting rigidity of the intermediate beam 3 against the twist of the suspension arm 2 can be easily secured. . On the other hand, the first and second cutout end portions 3e 'and 3d' of the first and second cutout portions 3e and 3d are inwardly of the vehicle from the center line Y of the suspension arm 2 when viewed from above the vehicle. The intermediate beam 3 can be easily set on the suspension arm 2. As a result, the intermediate beam 3 can be firmly and stably attached with a simple configuration without increasing the number of parts such as gussets.

図４，図５は、中間ビーム３の断面形状を略Ｕ字形とした実施例２を示す。図中、図１〜図３と同一符号は同一又は相当部分を示す。   4 and 5 show a second embodiment in which the cross-sectional shape of the intermediate beam 3 is substantially U-shaped. In the figure, the same reference numerals as those in FIGS. 1 to 3 denote the same or corresponding parts.

本実施例２においても、境界部３ｃの先端面３ａは、サスペンションアーム２の中心線Ｙより車両外方側に位置している。また第１，第２切欠き端部３ｅ′，３ｄ′は前記中心線Ｙより車両内方側に位置しており、第１切欠き部３ｅのサスペンションアーム２との当接長は、第２切欠き部３ｄの当接長より長くなっている。従って、本実施例２においても前記実施例１と同様の作用効果が得られる。   Also in the second embodiment, the front end surface 3 a of the boundary portion 3 c is located on the vehicle outer side with respect to the center line Y of the suspension arm 2. The first and second cutout end portions 3e 'and 3d' are located on the vehicle inner side with respect to the center line Y, and the contact length of the first cutout portion 3e with the suspension arm 2 is second. It is longer than the contact length of the notch 3d. Therefore, the same effects as those of the first embodiment can be obtained in the second embodiment.

なお、前記実施例１，２では、前記中間ビーム３を、車両側方視で、下方に開口したものとしたが、上方に開口したものとしてもよい。   In the first and second embodiments, the intermediate beam 3 is opened downward as viewed from the side of the vehicle, but may be opened upward.

また前記実施例では、前記サスペンションアーム２を、板材をパイプ状に成形し、突き合わせ部を溶接したものとしたが、パイプ材で構成しても勿論構わない。   Moreover, in the said Example, although the said suspension arm 2 formed the board | plate material in the shape of a pipe and welded the butt | matching part, of course, you may comprise with a pipe material.

１ サスペンション装置
２ サスペンションアーム
２ｄ 外周面
３ 中間ビーム
３ｂ 切欠き部
３ｃ 境界部
３ｄ 第２切欠き部
３ｄ′ 第２切欠き端部
３ｅ 第１切欠き部
３ｅ′ 第１切欠き端部
５ 車輪
Ｙ サスペンションアームの中心線 DESCRIPTION OF SYMBOLS 1 Suspension apparatus 2 Suspension arm 2d Outer peripheral surface 3 Intermediate beam 3b Notch part 3c Boundary part 3d Second notch part 3d 'Second notch end part 3e First notch part 3e' First notch end part 5 Wheel Y Suspension arm center line

Claims (1)

一端が車体に揺動可能に支持され、他端に車輪を回転可能に支持する左，右一対のサスペンションアームと、該左，右一対のサスペンションアームに架け渡す様に車幅方向に向けて配設された中間ビームとを備え、前記中間ビームの横断面形状は、車両側方視で、下方又は上方に開口する略Ｖ字形状又は略Ｕ字形状を成し、前記中間ビームの両端部には切欠き部が形成され、該切欠き部が前記サスペンションアームの外周面に溶接された車両のサスペンション装置において、
前記サスペンションアームはパイプ状に形成されており、
前記切欠き部は、前記サスペンションアームの外周面に沿うと共に車両側方視で、車両前後方向に間隔をあけて、かつ前記サスペンションアームの中心線を上下に跨ぐ様に配設された第１切欠き部及び第２切欠き部を有し、前記車輪に近い側に位置する前記第１切欠き部の前記サスペンションアームの外周面への当接長を前記車輪に遠い側に位置する前記第２切欠き部の当接長より長く形成し、前記第１，第２切欠き部をサスペンションアームの外周面に溶接し、
前記中間ビームの両端部の、前記第１切欠き部と前記第２切欠き部との境界に位置する境界部を、車両上方視で、前記サスペンションアームの中心線より車両外方側に、かつパイプ外表面に沿う様に溶接し、
前記第１切欠き部，前記第２切欠き部の前記中心線を挟んで前記境界部の反対側に位置する前記第１切欠き端部，第２切欠き端部を、車両上方視で、前記サスペンションアームの、前記中心線より車両内方部分に溶接した
ことを特徴とする車両のサスペンション装置。 A pair of left and right suspension arms, one end of which is swingably supported by the vehicle body and the other end of which is rotatably supported by the vehicle body, and a pair of left and right suspension arms are arranged in the vehicle width direction. The intermediate beam has a substantially V-shape or a substantially U-shape that opens downward or upward when viewed from the side of the vehicle, and has an intermediate beam provided at both ends of the intermediate beam. In a vehicle suspension apparatus in which a notch is formed and the notch is welded to the outer peripheral surface of the suspension arm,
The suspension arm is formed in a pipe shape,
The cutout portion is a first cutout that is disposed along the outer peripheral surface of the suspension arm and spaced from the vehicle front-rear direction and across the center line of the suspension arm in a vehicle side view. The second portion having a notch portion and a second notch portion, and a contact length of the first notch portion located on the side closer to the wheel with the outer peripheral surface of the suspension arm located on the side farther from the wheel. Forming longer than the contact length of the notch, and welding the first and second notches to the outer peripheral surface of the suspension arm;
A boundary portion located at a boundary between the first notch portion and the second notch portion at both ends of the intermediate beam is located on the vehicle outer side from the center line of the suspension arm when viewed from above the vehicle, and Weld along the outer surface of the pipe,
The first notch portion and the second notch end portion located on the opposite side of the boundary portion across the center line of the first notch portion and the second notch portion, as viewed from above the vehicle, A vehicle suspension device , wherein the suspension arm is welded to an inner portion of the vehicle from the center line .
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KR101399335B1 (en) * 2012-11-02 2014-05-27 주식회사 성우하이텍 Rear suspension of coupled torsion beam axle type
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US5409255A (en) * 1990-08-10 1995-04-25 Benteler Industries, Inc. Twist beam axle
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