JP5398078B2 - Suspension device in vehicle - Google Patents

Suspension device in vehicle Download PDF

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JP5398078B2
JP5398078B2 JP2010049732A JP2010049732A JP5398078B2 JP 5398078 B2 JP5398078 B2 JP 5398078B2 JP 2010049732 A JP2010049732 A JP 2010049732A JP 2010049732 A JP2010049732 A JP 2010049732A JP 5398078 B2 JP5398078 B2 JP 5398078B2
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arm
suspension device
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JP2011183906A (en
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琢久 坂上
義朗 樋口
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Daihatsu Motor Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • 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
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)

Description

本発明は、車両の幅方向に延び、その長手方向の各端部が、それぞれトレーリングアームに溶接により結合されるトーションビームを備えた車両における懸架装置に関するものである。   The present invention relates to a suspension device in a vehicle provided with a torsion beam that extends in the width direction of the vehicle and whose longitudinal ends are coupled to a trailing arm by welding.

上記車両における懸架装置には、従来、下記特許文献１の特に図１〜図３に示されるものがある。この図１〜図３のものによれば、上記懸架装置は、それぞれ車両の前後方向に延び、その各後端部側が上下に揺動可能となるよう前端部が車体に枢支され、上記各後端部が車輪を回転可能に支持する中空構造の左右一対のトレーリングアームと、車両の幅方向に延び、そのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されると共に各端部が上記各アームの長手方向の中途部に溶接により結合されるトーションビームとを備えている。   Conventionally, there are suspension devices in the above-mentioned vehicle, particularly those shown in FIGS. 1 to 3, the suspension device extends in the front-rear direction of the vehicle, and its front end is pivotally supported on the vehicle body so that its rear end can swing up and down. A pair of left and right trailing arms having a hollow structure whose rear end portion rotatably supports the wheels, and extending in the width direction of the vehicle, the cross-sections of almost all the lengths are formed to have the same shape and the same size as each end. And a torsion beam coupled to the middle part in the longitudinal direction of each arm by welding.

ここで、上記したように、ビームはそのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されたものである。このため、上記ビームは、上記公報の図４で示すような他のビーム、つまり、長手方向の各部断面がその端部に向かうに従い徐々に拡大されるような他のビームに比べて、構成が簡単で、かつ、歩留りが向上することから、上記ビームを用いた場合には、車両の生産性が向上するという利点を有している。   Here, as described above, the beam is formed so that the cross-sections of the respective parts over almost the entire length are the same shape and size. For this reason, the beam is configured in comparison with other beams as shown in FIG. 4 of the above-mentioned publication, that is, other beams whose longitudinal section is gradually expanded toward the end. Since it is simple and the yield is improved, the use of the beam has the advantage that the productivity of the vehicle is improved.

また、上記公報の図１〜図３のものを、より詳しく説明すると、上記各アームの中途部には貫通孔が形成され、この貫通孔に上記ビームの端部が挿通されている。上記貫通孔の孔縁部とビームの端部の外周面とが溶接されて、これら各アームの中途部とビームの各端部とが互いに結合されている。   1 to 3 of the above publication will be described in more detail. A through hole is formed in the middle of each arm, and the end of the beam is inserted into the through hole. The hole edge portion of the through hole and the outer peripheral surface of the end portion of the beam are welded, and the midway portion of each arm and each end portion of the beam are coupled to each other.

そして、車両の走行中に、例えばローリングが生じて、上記各トレーリングアームの後端部に支持された左右車輪の上下揺動の位相が不一致になろうとするときには、上記したように左右のトレーリングアームを互いに結合しているトーションビームが捩り弾性変形し、そのとき生じる応力により、上記位相を一致させるよう働くこととなる。これにより、車両の走行中におけるローリングの発生が抑制されて、良好な操安性が維持されるようになっている。   When the vehicle is running, for example, rolling occurs and the left and right wheels supported by the rear end portions of the trailing arms tend to be out of phase with each other as described above. The torsion beams that couple the ring arms to each other are torsionally elastically deformed, and the resulting stress acts to match the above phases. Thereby, the occurrence of rolling while the vehicle is running is suppressed, and good operability is maintained.

特開２００２−１６６７１６号公報JP 2002-166716 A

ところで、上記したように公報の図１〜図３のものによれば、各アームの中途部に上記ビームの各端部を挿通させる貫通孔を形成しているが、このような貫通孔は上記ビームの端部をがたつきなく挿通させる必要があって、高い寸法精度が要求されると考えられる。よって、上記懸架装置の形成作業が煩雑になるおそれがある。   By the way, according to the thing of FIGS. 1-3 of a gazette as mentioned above, although the through-hole which penetrates each edge part of the said beam is formed in the middle part of each arm, such a through-hole is the above-mentioned It is necessary to insert the end of the beam without rattling, and it is considered that high dimensional accuracy is required. Therefore, there is a possibility that the work of forming the suspension device becomes complicated.

本発明は、上記のような事情に注目してなされたもので、本発明の目的は、車両における懸架装置の形成作業が容易にできるようにし、かつ、このようにした場合でも、上記懸架装置の上下方向の寸法が小さく抑制されて、車両における設置の自由度が良好に保たれるようにすることである。   The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to make it easy to form a suspension device in a vehicle, and even in such a case, the suspension device described above is provided. The size in the vertical direction is suppressed to be small, and the degree of freedom of installation in the vehicle is kept good.

請求項１の発明は、それぞれ車両１の前後方向に延び、その各後端部側が上下に揺動可能となるよう車体に枢支され、上記各後端部が車輪を回転可能に支持する中空構造の左右一対のトレーリングアーム５と、車両１の幅方向に延び、そのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されると共に各端部が上記各アーム５の長手方向の中途部６に溶接Ｗにより結合されるトーションビーム７とを備えた車両における懸架装置において、
上記各アーム５の中途部６の上、下面のうちのいずれか一方の面に、車両１の側面視（図２）で凹む凹部１６を形成し、上記ビーム７の各端部の上、下面のうち、上下方向で上記一方の面とは逆の面に、車両１の背面視（図３）で凹み、上記凹部１６と互いに嵌合可能な他の凹部１７を形成してこの嵌合部を互いに溶接Ｗし、これら溶接Ｗ部における車両１の外側方がわの各外側端部１８を、上記各アーム５の中途部６の上記背面視（図３）での断面における図心２０よりも車両１の外側方に位置させたことを特徴とする車両における懸架装置である。 The invention according to claim 1 is a hollow that extends in the front-rear direction of the vehicle 1 and is pivotally supported by the vehicle body so that the rear end portions thereof can swing up and down, and the rear end portions rotatably support the wheels. A pair of left and right trailing arms 5 of the structure, and extending in the width direction of the vehicle 1, are formed so that the cross-sections of the respective parts over the entire length are the same shape and the same size, and each end is in the longitudinal direction of each arm 5. In a suspension device in a vehicle provided with a torsion beam 7 coupled to a midway part 6 by welding W,
A concave portion 16 that is recessed in a side view of the vehicle 1 (FIG. 2) is formed on one of the upper and lower surfaces of the middle portion 6 of each arm 5, and the upper and lower surfaces of each end portion of the beam 7. The other concave portion 17 is formed on the surface opposite to the one surface in the vertical direction in the rear view (FIG. 3) of the vehicle 1 and can be fitted to the concave portion 16. Are welded to each other, and the outer end portions 18 of the outer side of the vehicle 1 in these welded W portions are connected to each other from the centroid 20 in the cross section in the rear view (FIG. 3) of the middle portion 6 of each arm 5. Is a suspension device in a vehicle characterized by being positioned outside the vehicle 1.

なお、この項において、上記各用語に付記した符号や図面番号は、本発明の技術的範囲を後述の「実施例」の項や図面の内容に限定解釈するものではない。   In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

本発明による効果は、次の如くである。   The effects of the present invention are as follows.

請求項１の発明は、それぞれ車両の前後方向に延び、その各後端部側が上下に揺動可能となるよう車体に枢支され、上記各後端部が車輪を回転可能に支持する中空構造の左右一対のトレーリングアームと、車両の幅方向に延び、そのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されると共に各端部が上記各アームの長手方向の中途部に溶接により結合されるトーションビームとを備えた車両における懸架装置において、
上記各アームの中途部の上、下面のうちのいずれか一方の面に、車両の側面視で凹む凹部を形成し、上記ビームの各端部の上、下面のうち、上下方向で上記一方の面とは逆の面に、車両の背面視で凹み、上記凹部と互いに嵌合可能な他の凹部を形成してこの嵌合部を互いに溶接し、これら溶接部における車両の外側方がわの各外側端部を、上記各アームの中途部の上記背面視での断面における図心よりも車両の外側方に位置させている。 The invention according to claim 1 is a hollow structure that extends in the front-rear direction of the vehicle, is pivotally supported by the vehicle body so that each rear end portion can swing up and down, and each rear end portion rotatably supports a wheel. A pair of left and right trailing arms, and extending in the width direction of the vehicle, are formed so that the cross-sections of the respective parts over the entire length are the same shape and the same size, and each end is welded to a middle part in the longitudinal direction of each arm. A suspension system in a vehicle with a torsion beam coupled by
A concave portion that is recessed in a side view of the vehicle is formed on one of the upper and lower surfaces of the middle part of each arm, and the one of the upper and lower surfaces of each end of the beam in the vertical direction. The other side of the vehicle is recessed in the reverse view of the vehicle, and another recess that can be fitted to the recess is formed and welded to each other. Each outer end is positioned on the outer side of the vehicle with respect to the centroid in the cross-sectional view in the rear view of the middle part of each arm.

このため、上記したように両凹部を互いに嵌合させたことに加えて、これら両凹部の嵌合部同士の溶接部における各外側端部を、上記各アームの中途部の断面における図心よりも車両の外側方に位置させたことから、上記各アームの中途部とビームの各端部との溶接部の長さを十分に長くできて、上記各アームの中途部とビームの各端部との結合部に所定の強度が確保される。   For this reason, in addition to fitting the two concave portions together as described above, the outer end portions of the welded portions of the fitting portions of the two concave portions are arranged from the centroid in the cross section of the middle portion of each arm. Since the position of the intermediate portion of each arm and each end portion of the beam can be sufficiently increased, the intermediate portion of each arm and each end portion of the beam A predetermined strength is ensured at the joint portion.

そして、上記したように、溶接部の長さを長くすることは、上記各アームの中途部に凹部を形成する一方、上記ビームの各端部に他の凹部を形成して、これら両凹部を互いに嵌合させ、その嵌合部を溶接する、という簡単な構成によって達成される。   And as described above, increasing the length of the welded portion forms a recess in the middle of each arm, while forming another recess in each end of the beam. This is achieved by a simple configuration of fitting each other and welding the fitting portions.

このため、アームの中途部にビームの端部をがたつきなく挿通させる貫通孔を形成するものであって高い寸法精度が要求されると考えられる前記従来の技術に比べ、上記発明によれば、そのような寸法精度が要求されないで足りる分、上記懸架装置の形成作業が容易にできる。   For this reason, according to the said invention compared with the said prior art which forms the through-hole which penetrates the edge part of a beam without rattling in the middle part of an arm, and is considered that a high dimensional accuracy is requested | required. Since the dimensional accuracy is not required, the suspension device can be easily formed.

また、上記したように、各アームとビームとの結合部に所定の強度を確保するために互いの溶接部の長さを長くしようとする場合において、上記各アームの中途部に凹部を形成する一方、上記ビームの各端部に他の凹部を形成して、これら両凹部を互いに嵌合させ、その嵌合部を溶接するようにしたため、上記各アームの中途部と上記ビームの各端部とを単に上下に重ね合わせて溶接することに比べて、懸架装置の上下方向の寸法を小さく抑制できる。よって、車両における上記懸架装置の設置の自由度が良好に保たれると共に、車両の低床化にも寄与することができる。   Further, as described above, in order to increase the length of each welded portion in order to ensure a predetermined strength at the joint between each arm and the beam, a recess is formed in the middle part of each arm. On the other hand, other recesses are formed at each end of the beam, the recesses are fitted to each other, and the fittings are welded together, so that the middle part of each arm and each end of the beam Can be suppressed to a smaller size in the vertical direction of the suspension device. Therefore, the degree of freedom of installation of the suspension device in the vehicle can be maintained satisfactorily, and it can contribute to lowering the floor of the vehicle.

懸架装置の部分斜視図である。It is a fragmentary perspective view of a suspension apparatus. 図１のII−II線矢視断面図である。It is the II-II sectional view taken on the line of FIG. 図１のIII−III線矢視断面図である。FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1.

本発明の車両における懸架装置に関し、車両における懸架装置の形成作業が容易にできるようにし、かつ、このようにした場合でも、上記懸架装置の上下方向の寸法が小さく抑制されて、車両における設置の自由度が良好に保たれるようにする、という目的を実現するため、本発明を実施するための形態は、次の如くである。   The present invention relates to a suspension apparatus in a vehicle, which makes it easy to form a suspension apparatus in a vehicle, and even in this case, the vertical dimension of the suspension apparatus is suppressed to be small, In order to realize the object of maintaining a good degree of freedom, a mode for carrying out the present invention is as follows.

即ち、車両における懸架装置は、それぞれ車両の前後方向に延び、その各後端部側が上下に揺動可能となるよう車体に枢支され、上記各後端部が車輪を回転可能に支持する中空構造の左右一対のトレーリングアームと、車両の幅方向に延び、そのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されると共に各端部が上記各アームの長手方向の中途部に溶接により結合されるトーションビームとを備える。   That is, the suspension device in the vehicle extends in the front-rear direction of the vehicle, is pivotally supported by the vehicle body so that the rear end portions of the suspension device can swing up and down, and the rear end portions support the wheels rotatably. A pair of left and right trailing arms having a structure, and extending in the width direction of the vehicle, are formed so that the cross-sections of the respective parts over the entire length are the same shape and the same size, and each end is in the middle of the longitudinal direction of each arm. And a torsion beam coupled by welding.

上記各アームの中途部の上、下面のうちのいずれか一方の面に、車両の側面視で凹む凹部が形成される。上記ビームの各端部の上、下面のうち、上下方向で上記一方の面とは逆の面に、車両の背面視で凹み、上記凹部と互いに嵌合可能な他の凹部が形成されてこの嵌合部が互いに溶接される。これら溶接部における車両の外側方がわの各外側端部が、上記各アームの中途部の上記背面視での断面における図心よりも車両の外側方に位置させられる。   A concave portion that is recessed in a side view of the vehicle is formed on one of the upper surface and the lower surface of the middle portion of each arm. Of the upper and lower surfaces of each end of the beam, another concave portion is formed on the surface opposite to the one surface in the vertical direction. The fitting parts are welded together. The outer end portions of the welded portions on the outer side of the vehicle are positioned on the outer side of the vehicle with respect to the centroid in the cross section in the rear view of the middle portion of each arm.

本発明をより詳細に説明するために、その実施例を添付の図に従って説明する。   In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

図において、自動車で例示される車両１は、不図示の車体に後車輪を懸架する懸架装置２を備えている。また、図中矢印Ｆｒは、この車両１の進行方向の前方を示している。   In the figure, a vehicle 1 exemplified by an automobile includes a suspension device 2 for suspending a rear wheel on a vehicle body (not shown). An arrow Fr in the figure indicates the front of the vehicle 1 in the traveling direction.

上記懸架装置２は、それぞれ車両１の前後方向に直線的に延び、その各後端部側がこの後端部に一体形成されたボス部３と共に上下に揺動可能となるよう各前端部が円筒体４を介し車体に枢支される左右一対のアーム５，５と、車両１の幅方向に直線的に延び、その長手方向の各端部が上記各アーム５の長手方向の中途部６に溶接Ｗにより結合されるトーションビーム７と、上記各ボス部３に突設され、上記車輪を回転可能に支持する支軸１０とを備えている。つまり、上記各アーム５の後端部は、上記ボス部３と支軸１０とを介し上記車輪を回転可能に支持している。   The suspension device 2 extends linearly in the front-rear direction of the vehicle 1, and each front end portion is cylindrical so that each rear end portion can swing up and down together with a boss portion 3 formed integrally with the rear end portion. A pair of left and right arms 5, 5 pivotally supported by the vehicle body via the body 4, and linearly extend in the width direction of the vehicle 1, and each longitudinal end of the arm 5 extends in the longitudinal middle 6 of each arm 5. A torsion beam 7 coupled by welding W and a support shaft 10 projecting from each boss portion 3 and rotatably supporting the wheel are provided. That is, the rear end portion of each arm 5 supports the wheel rotatably via the boss portion 3 and the support shaft 10.

上記各アーム５は、板金製のの中空構造をなしている。具体的には、これら各アーム５は、鉄板材をプレス加工により屈曲することにより、断面円形のパイプ形状となるよう形成されている。   Each of the arms 5 has a hollow structure made of sheet metal. Specifically, each of these arms 5 is formed into a pipe shape having a circular cross section by bending an iron plate material by press working.

上記ビーム７は、板金製で、そのほぼ全長にわたる各部断面が互いに同形同大となるようプレス加工により形成されている。具体的には、上記ビーム７の長手方向の各部断面は倒立Ｖ字形状とされ、互いに一体的に形成された前面板１２と後面板１３とを備えている。   The beam 7 is made of sheet metal, and is formed by pressing so that the cross-sections of the respective parts over almost the entire length are the same shape and size. Specifically, each cross section of the beam 7 in the longitudinal direction has an inverted V shape, and includes a front plate 12 and a rear plate 13 that are integrally formed with each other.

上記各アーム５の中途部６の上面に、それぞれ車両１の側面視（図２）で下方に向かって凹む凹部１６が形成されている。この凹部１６はプレス加工されたもので、上記アーム５の中途部６の上面を下方に向かって押圧し、上面側を下方に向かって塑性変形させることにより形成されている。これにより、車両１の背面視（図３）における上記アーム５の中途部６の断面は、上下方向に延びる短辺を有する横長の楕円形状とされている。   A concave portion 16 is formed on the upper surface of the middle portion 6 of each arm 5 so as to be recessed downward in a side view of the vehicle 1 (FIG. 2). The recess 16 is formed by pressing, and is formed by pressing the upper surface of the middle portion 6 of the arm 5 downward and plastically deforming the upper surface side downward. Thereby, the cross section of the middle part 6 of the arm 5 in the rear view of the vehicle 1 (FIG. 3) is a horizontally long elliptical shape having a short side extending in the vertical direction.

一方、上記ビーム７の端部の下面には、車両１の背面視（図３）で上方に向かって凹み、上記凹部１６と互いに嵌合可能な他の凹部１７が形成されている。この他の凹部１７は、上記ビーム７の端部における前、後面板１２，１３の各下端縁部を円弧形状に切り欠くことにより形成されている。そして、上記アーム５の凹部１６とビーム７の他の凹部１７との嵌合部が互いに全体的にアーク溶接Ｗされている。   On the other hand, the lower surface of the end portion of the beam 7 is formed with another recess 17 that is recessed upward as viewed from the rear of the vehicle 1 (FIG. 3) and can be fitted to the recess 16. The other recesses 17 are formed by notching the lower end edges of the front and rear plates 12 and 13 at the end of the beam 7 into an arc shape. And the fitting part of the recessed part 16 of the said arm 5 and the other recessed part 17 of the beam 7 is entirely arc-welded mutually.

上記の場合、両凹部１６，１７の嵌合部同士の溶接Ｗ部における車両１の外側方がわの外側端部１８は、上記各アーム５の中途部６の上記背面視（図３）での断面における図心２０よりも車両１の外側方に位置させられている。つまり、上記ビーム７の各端部は、上記各アーム５の中途部６の図心２０を車両１の幅方向で跨ぐよう形成されている。また、上記ビーム７の端部の上端面は、上記アーム５の中途部６を除く長手方向の他部の上端面よりも上記アーム５の中途部６側に位置するよう低く位置させられている。   In the above case, the outer end 18 of the outer side of the vehicle 1 in the welded W portion between the fitting portions of the concave portions 16 and 17 is the rear view of the midway portion 6 of each arm 5 (FIG. 3). It is located in the outer side of the vehicle 1 rather than the centroid 20 in the cross section. That is, each end of the beam 7 is formed so as to straddle the centroid 20 of the midway portion 6 of each arm 5 in the width direction of the vehicle 1. Further, the upper end surface of the end portion of the beam 7 is positioned lower than the upper end surface of the other part in the longitudinal direction excluding the midway portion 6 of the arm 5 so as to be positioned on the midway portion 6 side of the arm 5. .

なお、以上は図示の例によるが、上記各アーム５の中途部６の下面に、車両１の側面視で上方に向かって凹む凹部１６を形成し、上記ビーム７の各端部の上、下面のうち、上下方向で上記各アーム５の中途部６の下面とは逆の上面に、車両１の背面視で下方に向かって凹み、上記凹部１６と互いに嵌合可能な他の凹部１７を形成してもよい。また、この場合、上記ビーム７の端部の下端面が、上記アーム５の中途部６を除く長手方向の他部の下端面よりも上記アーム５の中途部６側に位置するよう高く位置させてもよい。   In addition, although the above is based on the example of illustration, the recessed part 16 dented upward is formed in the lower surface of the middle part 6 of each said arm 5 by the side view of the vehicle 1, and the upper surface and lower surface of each edge part of the said beam 7 are formed. Of these, another concave portion 17 is formed on the upper surface opposite to the lower surface of the middle portion 6 of each arm 5 in the vertical direction. May be. Further, in this case, the lower end surface of the end portion of the beam 7 is positioned higher than the lower end surface of the other portion in the longitudinal direction excluding the midway portion 6 of the arm 5 so as to be positioned on the midway portion 6 side of the arm 5. May be.

また、上記各アーム５の長手方向の各部断面は、その中途部６を含み、それぞれ矩形状であってもよい。また、上記各アーム５は、２つの半割部材を突き合わせ溶接により結合して形成してもよい。また、上記ビーム７の断面はＶ字、Ｕ字、倒立Ｕ字、Ｃ字形状であってもよく、円形や楕円のパイプ形状であってもよい。   Moreover, each part cross section of the said arm 5 in the longitudinal direction includes the intermediate part 6, and may each be a rectangular shape. Each arm 5 may be formed by joining two halved members by butt welding. The beam 7 may have a V-shaped, U-shaped, inverted U-shaped or C-shaped cross section, or a circular or elliptical pipe shape.

また、上記ビーム７の端部に形成される他の凹部１７は、このビーム７の端部における前、後面板１２，１３などを屈曲させることにより形成してもよい。   Further, the other concave portion 17 formed at the end portion of the beam 7 may be formed by bending the front and rear plates 12 and 13 at the end portion of the beam 7.

上記構成によれば、上記各アーム５の中途部６の上、下面のうちのいずれか一方の面に、車両１の側面視（図２）で凹む凹部１６を形成し、上記ビーム７の各端部の上、下面のうち、上下方向で上記一方の面とは逆の面に、車両１の背面視（図３）で凹み、上記凹部１６と互いに嵌合可能な他の凹部１７を形成してこの嵌合部を互いに溶接Ｗし、これら溶接Ｗ部における車両１の外側方がわの各外側端部１８を、上記各アーム５の中途部６の上記背面視（図３）での断面における図心２０よりも車両１の外側方に位置させている。   According to the above configuration, the concave portion 16 that is recessed in the side view (FIG. 2) of the vehicle 1 is formed on one of the upper and lower surfaces of the middle portion 6 of each arm 5. Of the upper and lower surfaces of the end portion, another recess 17 that is recessed in the rear view of the vehicle 1 (FIG. 3) and can be fitted to the recess 16 is formed on the surface opposite to the one surface in the vertical direction. Then, the fitting portions are welded to each other, and the outer end portions 18 of the outer side of the vehicle 1 in the welded W portions are connected to the intermediate portions 6 of the arms 5 in the rear view (FIG. 3). It is located on the outer side of the vehicle 1 with respect to the centroid 20 in the cross section.

このため、上記したように両凹部１６，１７を互いに嵌合させたことに加えて、これら両凹部１６，１７の嵌合部同士の溶接Ｗ部における各外側端部１８を、上記各アーム５の中途部６の断面における図心２０よりも車両１の外側方に位置させたことから、上記各アーム５の中途部６とビーム７の各端部との溶接Ｗ部の長さを十分に長くできて、上記各アーム５の中途部６とビーム７の各端部との結合部に所定の強度が確保される。   Therefore, in addition to fitting the concave portions 16 and 17 together as described above, the outer end portions 18 in the welded W portions of the fitting portions of the concave portions 16 and 17 are connected to the arms 5. Since the cross section of the midway part 6 is positioned on the outer side of the vehicle 1 with respect to the centroid 20, the length of the weld W part between the midway part 6 of each arm 5 and each end of the beam 7 is sufficiently large. It can be made long, and a predetermined strength is ensured at the connecting portion between the middle portion 6 of each arm 5 and each end portion of the beam 7.

そして、上記したように、溶接Ｗ部の長さを長くすることは、上記各アーム５の中途部６に凹部１６を形成する一方、上記ビーム７の各端部に他の凹部１７を形成して、これら両凹部１６，１７を互いに嵌合させ、その嵌合部を溶接Ｗする、という簡単な構成によって達成される。   As described above, increasing the length of the weld W portion forms a recess 16 in the middle portion 6 of each arm 5, while forming another recess 17 at each end of the beam 7. Thus, it is achieved by a simple configuration in which both the concave portions 16 and 17 are fitted to each other and the fitting portions are welded W.

このため、アームの中途部にビームの端部をがたつきなく挿通させる貫通孔を形成するものであって高い寸法精度が要求されると考えられる前記従来の技術に比べ、上記構成によれば、そのような寸法精度が要求されないで足りる分、上記懸架装置２の形成作業が容易にできる。   For this reason, according to the above configuration, compared to the conventional technique in which a through hole is formed in the middle part of the arm to insert the end of the beam without rattling, and high dimensional accuracy is required. Since the dimensional accuracy is not required, the work for forming the suspension device 2 can be facilitated.

また、上記したように、各アーム５とビーム７との結合部に所定の強度を確保するために互いの溶接Ｗ部の長さを長くしようとする場合において、上記各アーム５の中途部６に凹部１６を形成する一方、上記ビーム７の各端部に他の凹部１７を形成して、これら両凹部１６，１７を互いに嵌合させ、その嵌合部を溶接Ｗするようにしたため、上記各アーム５の中途部６と上記ビーム７の各端部とを単に上下に重ね合わせて溶接することに比べて、懸架装置２の上下方向の寸法を小さく抑制できる。よって、車両１における上記懸架装置２の設置の自由度が良好に保たれると共に、車両１の低床化にも寄与することができる。   Further, as described above, when it is intended to increase the length of each weld W portion in order to ensure a predetermined strength at the joint portion between each arm 5 and the beam 7, the middle portion 6 of each arm 5. On the other hand, other recesses 17 are formed at each end of the beam 7, and the recesses 16 and 17 are fitted to each other, and the fitting portion is welded W. The vertical dimension of the suspension device 2 can be reduced as compared with the case where the midway part 6 of each arm 5 and each end part of the beam 7 are simply overlapped and welded. Therefore, the degree of freedom of installation of the suspension device 2 in the vehicle 1 can be maintained satisfactorily, and it can contribute to the lower floor of the vehicle 1.

また、前記したように、各アーム５の中途部６に、プレス加工による凹部１６を形成している。   Further, as described above, the recess 16 is formed in the middle portion 6 of each arm 5 by press working.

このため、上記凹部１６の形成の前後における上記アーム５の中途部６の断面積の変化を小さく抑制できることから、上記したようにアーム５の中途部６に凹部１６を形成した場合でも、このアーム５の中途部６周りに応力集中が生じることは防止される。よって、上記各アーム５の中途部６とビーム７の各端部との結合部には、所定の強度がより確実に確保される。   For this reason, since the change of the cross-sectional area of the middle part 6 of the arm 5 before and after the formation of the concave part 16 can be suppressed small, even when the concave part 16 is formed in the middle part 6 of the arm 5 as described above, this arm It is possible to prevent stress concentration from occurring around the midway part 6. Therefore, a predetermined strength is more reliably ensured at the coupling portion between the middle portion 6 of each arm 5 and each end portion of the beam 7.

また、前記したように、車両１の背面視（図３）における上記アーム５の中途部６の断面は楕円形状とされていて、その外面の各部は円弧凸面とされている。そして、このアーム５の中途部６の上部外面における円弧凸面と、上記ビーム７の端部の他の凹部１７とが上下方向で互いに嵌合し、その嵌合部が互いに溶接Ｗされている。   Further, as described above, the cross section of the midway portion 6 of the arm 5 in the rear view of the vehicle 1 (FIG. 3) is an elliptical shape, and each portion of the outer surface is an arc convex surface. And the circular arc convex surface in the upper outer surface of the middle part 6 of this arm 5 and the other concave part 17 of the edge part of the said beam 7 mutually fit in the up-down direction, and the fitting part is welded W mutually.

このため、上記アーム５の中途部６とビーム７の端部との結合部には、上記したように、これら５，７が上下方向で互いに嵌合した分、特に、車両１の幅方向での結合強度が向上する。よって、上記結合部には、所定の強度がより確実に確保される。   For this reason, as described above, the joint portion between the midway portion 6 of the arm 5 and the end portion of the beam 7 is fitted in the vertical direction, particularly in the width direction of the vehicle 1. The bond strength is improved. Therefore, predetermined | prescribed intensity | strength is ensured more reliably at the said connection part.

１ 車両
２ 懸架装置
５ アーム
６ 中途部
７ ビーム
１６ 凹部
１７ 他の凹部
１８ 外側端部
２０ 図心
Ｗ 溶接 DESCRIPTION OF SYMBOLS 1 Vehicle 2 Suspension device 5 Arm 6 Midway part 7 Beam 16 Concave part 17 Other recessed part 18 Outer edge part 20 Centroid W welding

Claims (1)

それぞれ車両の前後方向に延び、その各後端部側が上下に揺動可能となるよう車体に枢支され、上記各後端部が車輪を回転可能に支持する中空構造の左右一対のトレーリングアームと、車両の幅方向に延び、そのほぼ全長にわたる各部断面が互いに同形同大となるよう形成されると共に各端部が上記各アームの長手方向の中途部に溶接により結合されるトーションビームとを備えた車両における懸架装置において、
上記各アームの中途部の上、下面のうちのいずれか一方の面に、車両の側面視で凹む凹部を形成し、上記ビームの各端部の上、下面のうち、上下方向で上記一方の面とは逆の面に、車両の背面視で凹み、上記凹部と互いに嵌合可能な他の凹部を形成してこの嵌合部を互いに溶接し、これら溶接部における車両の外側方がわの各外側端部を、上記各アームの中途部の上記背面視での断面における図心よりも車両の外側方に位置させたことを特徴とする車両における懸架装置。 A pair of left and right trailing arms having a hollow structure that extends in the longitudinal direction of the vehicle and is pivotally supported by the vehicle body so that the rear end portions thereof can swing up and down, and the rear end portions rotatably support the wheels. And a torsion beam that extends in the width direction of the vehicle and that is formed so that the cross-sections of the respective parts extending substantially along the entire length thereof have the same shape and the same size, and each end is joined to the longitudinal middle part of each arm by welding. In the suspension device in the vehicle provided,
A concave portion that is recessed in a side view of the vehicle is formed on one of the upper and lower surfaces of the middle part of each arm, and the one of the upper and lower surfaces of each end of the beam in the vertical direction. The other side of the vehicle is recessed in the reverse view of the vehicle, and another recess that can be fitted to the recess is formed and welded to each other. A suspension device for a vehicle, characterized in that each outer end portion is positioned on the outer side of the vehicle with respect to a centroid in a cross-sectional view in the rear view of the middle portion of each arm.
JP2010049732A 2010-03-05 2010-03-05 Suspension device in vehicle Expired - Fee Related JP5398078B2 (en)

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