JP2005306177A - Torsion beam type suspension device - Google Patents

Torsion beam type suspension device Download PDF

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JP2005306177A
JP2005306177A JP2004124962A JP2004124962A JP2005306177A JP 2005306177 A JP2005306177 A JP 2005306177A JP 2004124962 A JP2004124962 A JP 2004124962A JP 2004124962 A JP2004124962 A JP 2004124962A JP 2005306177 A JP2005306177 A JP 2005306177A
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torsion beam
bent portion
torsion
gap
inner bent
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JP4211667B2 (en
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Shinichi Fujiwara
真一 藤原
Satoshi Uchida
智 内田
Masaya Akita
昌也 秋田
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Toyota Motor Corp
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Toyota Motor Corp
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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
    • 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
    • B60G2206/427—Stabiliser bars or tubes
    • 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
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8103—Shaping by folding or bending
    • 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
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8107—Shaping by hydroforming

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

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate setting of the torsional rigidity and the shearing center of a torsion beam, lessen the change of the shearing center caused by an alteration of the torsional rigidity, and suppress emission of noises in association with torsion of the beam. <P>SOLUTION: The middle part 21 of the torsion beam is crushed so that an approximately V-form section is given, where an outer bent part 21a and an inner bent part 21b are provided, which abut together by their crests 21a1 and 21b1. A hollow 21c is formed in the end parts 21a1 and 21b1, while a gap 21d is formed enlarging continuously as going from the crests 21a1 and 21b1 toward the end parts 21a1 and 21b1. The gap 21d has a size as large as able to make setting of the torsional rigidity of the beam to the specified value by suppressing the emission of the noise caused by slide contacting of the outer bent part 21a with the inner bent part 21b when the torsion beam is twisted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、左右一対のトレーリングアームおよびトーションビームを備えたトーションビーム式サスペンション装置に関する。   The present invention relates to a torsion beam suspension device including a pair of left and right trailing arms and a torsion beam.

従来から、この種のトーションビーム式サスペンション装置としては、例えば下記特許文献１に記載されているように、トーションビームを円筒状のパイプで構成し、同パイプの軸線方向中間部を押し潰して同中間部の横断面を略Ｖ字状または略Ｕ字状に形成したものが知られている。この種のトーションビームにおいては、外側曲げ部と内側曲げ部間に当接部を有さず、外側曲げ部と内側曲げ部間の全体に渡って所定の中空部を有しているものと、両端部を除き外側曲げ部と内側曲げ部間に当接部を有し、両端部にて所定の中空部を有しているものとがある。これらのトーションビームにおいては、中空部を所定の大きさに変えることによって、左右車輪が逆位相（上下逆方向）に変位して同ビームが捩られたときの捩り剛性を変更することができる。すなわち、中空部の大きさを変えることによって、車両のロール剛性を変化させることができる。
特開２００１−３２１８４６号公報 Conventionally, as this type of torsion beam suspension device, as described in, for example, Patent Document 1 below, the torsion beam is formed of a cylindrical pipe, and the intermediate portion in the axial direction is crushed by the same intermediate portion. Are formed in a substantially V-shaped or substantially U-shaped cross section. In this type of torsion beam, there is no abutting part between the outer bending part and the inner bending part, and there is a predetermined hollow part between the outer bending part and the inner bending part. Some have a contact portion between the outer bent portion and the inner bent portion except for the portion, and have predetermined hollow portions at both ends. In these torsion beams, by changing the hollow portion to a predetermined size, it is possible to change the torsional rigidity when the left and right wheels are displaced in opposite phases (upward and downward directions) and the beams are twisted. That is, the roll rigidity of the vehicle can be changed by changing the size of the hollow portion.
Japanese Patent Laid-Open No. 2001-321846

上記した両トーションビームは、一般に上型と下型を用いてプレス成型によって形成される。この場合、上記した前者のトーションビームを成型する際には、外側曲げ部と内側曲げ部間の全体に渡って所定の中空部を形成する必要があるため、成型工程上、下型を上型に突き当てることができない。すなわち、上型に対する下型の位置決めが不十分になり易い。このため、トーションビームの横断面形状が不均一になり易く、捩り剛性を所定の値に設定したり、せん断中心（捩り中心）を所定の位置に設定することが困難であるという問題がある。これに対して、上記した後者のトーションビームを成型する際には、外側曲げ部と内側曲げ部とを両端部を除いて当接させるため、同ビームの横断面形状を均一化することができる。しかし、この場合には、トーションビームの捩れに伴い外側曲げ部と内側曲げ部との摺接により異音が発生するという問題がある。また、上記した両トーションビームにおいては、捩り剛性を変更するために中空部を所定の大きさに変えた場合、同ビームの横断面形状が変わることが多く、捩り剛性の変更に伴いせん断中心が変化し易いという問題もある。なお、せん断中心が変化すると、捩れに伴うトーションビームの各部位における変位量が変化して、車両のステア特性が変化する。   Both torsion beams described above are generally formed by press molding using an upper mold and a lower mold. In this case, when the former torsion beam is molded, it is necessary to form a predetermined hollow portion over the entire area between the outer bent portion and the inner bent portion. I can't hit it. That is, the positioning of the lower mold with respect to the upper mold tends to be insufficient. For this reason, there is a problem that the cross-sectional shape of the torsion beam is likely to be non-uniform, and it is difficult to set the torsional rigidity to a predetermined value and to set the shear center (torsion center) at a predetermined position. In contrast, when the latter torsion beam is molded, the outer bent portion and the inner bent portion are brought into contact with each other except for both end portions, so that the cross-sectional shape of the beam can be made uniform. However, in this case, there is a problem that abnormal noise is generated due to sliding contact between the outer bent portion and the inner bent portion as the torsion beam is twisted. In both of the torsion beams described above, when the hollow portion is changed to a predetermined size in order to change the torsional rigidity, the cross-sectional shape of the beam often changes, and the shear center changes as the torsional rigidity changes. There is also a problem that it is easy to do. Note that when the shear center changes, the amount of displacement of each part of the torsion beam accompanying torsion changes, and the steering characteristic of the vehicle changes.

本発明は、上記問題に対処するためになされたものであり、その目的は、トーションビームの捩り剛性およびせん断中心をそれぞれ所定値および所定位置に設定することが容易であり、かつ同ビームにおける捩り剛性の変更に伴うせん断中心の変化を小さくするとともに、同ビームの捩れに伴う異音の発生をも抑制可能なトーションビームを備えたトーションビーム式サスペンション装置を提供することにある。   The present invention has been made to cope with the above-described problems, and the object thereof is to easily set the torsional rigidity and the shear center of the torsion beam to a predetermined value and a predetermined position, respectively, and torsional rigidity in the beam. It is an object of the present invention to provide a torsion beam suspension device including a torsion beam that can reduce the change in the shear center associated with the change of the above and can suppress the generation of noise due to the twisting of the beam.

上記目的を達成するため、本発明の特徴は、車両の幅方向に延設されていて、両端部が左右一対のトレーリングアームにそれぞれ接続されたトーションビームを備えたトーションビーム式サスペンション装置において、前記トーションビームを円筒状のパイプで構成し、前記パイプの軸線方向中間部を押し潰して同中間部の横断面を略Ｖ字状または略Ｕ字状に形成し、前記押し潰して形成された中間部における外側曲げ部と内側曲げ部とを各頂部にて当接させ、かつ前記外側曲げ部と内側曲げ部間に前記各頂部を除く領域にて所定の隙間を形成したことにある。この場合、前記外側曲げ部と内側曲げ部は、例えば、前記隙間を前記各頂部における当接端から略Ｖ字状または略Ｕ字状の端部に向かうに従って連続的に大きくする形状を有するものであるようにするとよい。   In order to achieve the above object, a feature of the present invention is that a torsion beam suspension device comprising a torsion beam extending in the width direction of a vehicle and having both ends connected to a pair of left and right trailing arms, respectively. Is formed by a cylindrical pipe, and the intermediate portion in the axial direction of the pipe is crushed to form a substantially V-shaped or substantially U-shaped cross section of the intermediate portion. The outer bent portion and the inner bent portion are brought into contact with each top portion, and a predetermined gap is formed between the outer bent portion and the inner bent portion in a region excluding the top portions. In this case, the outer bent portion and the inner bent portion have, for example, a shape in which the gap is continuously increased from the abutting end at each top portion toward the substantially V-shaped or substantially U-shaped end portion. It is good to make it.

これによれば、トーションビームは、その外側曲げ部と内側曲げ部とを各頂部にて当接させる、すなわち各頂部にて下型を上型に突き当てることにより成型される。このため、トーションビームの横断面形状を均一化することができるので、同ビームの捩り剛性を所定の値に設定したり、せん断中心を所定の位置に設定することが容易である。この場合、トーションビームの横断面形状が略Ｖ字状または略Ｕ字状であり、前記各頂部がせん断中心の近傍に位置するので、同ビームが捩られとき前記各頂部間の相対移動は小さい。したがって、トーションビームの捩れに伴い各頂部からの異音の発生を少なくすることが可能である。また、トーションビームの頂部から端部に向かうに従って外側曲げ部と内側曲げ部間に隙間が形成されている。これにより、トーションビームの捩れに伴う外側曲げ部と内側曲げ部間での異音の発生を抑制することができる。そして、この隙間を所定の大きさに設定することにより、トーションビームの捩り剛性を変更することができる。したがって、中空部の大きさを変えることに比して同ビームにおける横断面形状の変化が少なくなるので、捩り剛性を変更してもせん断中心の変化が小さくなる。すなわち、車両のステア特性を変化させずに、車両のロール剛性のみを変化させることが可能である。この場合、トーションビームの外側曲げ部と内側曲げ部を、前記隙間が連続的に大きくなる形状を有するものとすれば、せん断中心の変化をより一層小さくすることができる。   According to this, a torsion beam is shape | molded by making the outer side bending part and the inner side bending part contact | abut at each top part, ie, a lower mold | type abuts on an upper type | mold at each top part. For this reason, since the cross-sectional shape of the torsion beam can be made uniform, it is easy to set the torsional rigidity of the beam to a predetermined value and to set the shear center at a predetermined position. In this case, since the cross-sectional shape of the torsion beam is substantially V-shaped or substantially U-shaped, and the tops are located in the vicinity of the shear center, the relative movement between the tops is small when the beam is twisted. Therefore, it is possible to reduce the generation of abnormal noise from each top portion as the torsion beam is twisted. Further, a gap is formed between the outer bent portion and the inner bent portion as it goes from the top to the end of the torsion beam. Thereby, generation | occurrence | production of the noise between the outer side bending part and inner side bending part accompanying the twist of a torsion beam can be suppressed. The torsional rigidity of the torsion beam can be changed by setting the gap to a predetermined size. Therefore, since the change in the cross-sectional shape of the beam is reduced compared to changing the size of the hollow portion, the change in the shear center is reduced even if the torsional rigidity is changed. That is, it is possible to change only the roll rigidity of the vehicle without changing the steering characteristic of the vehicle. In this case, if the outer bent portion and the inner bent portion of the torsion beam have a shape in which the gap is continuously increased, the change in the shear center can be further reduced.

また、本発明の他の特徴は、前記外側曲げ部と内側曲げ部間に、潤滑剤が塗布または封入されていることにある。これによれば、外側曲げ部および内側曲げ部の各頂部から異音が発生したとしても同異音を不快感を与えない程度の大きさまで低減させることができる。   Another feature of the present invention is that a lubricant is applied or sealed between the outer bent portion and the inner bent portion. According to this, even if an abnormal noise is generated from each of the tops of the outer bent portion and the inner bent portion, the abnormal noise can be reduced to a level that does not cause discomfort.

以下、本発明の一実施形態について図面を用いて説明する。図１は、同実施形態に係るトーションビーム式サスペンション装置の全体を示していて、このトーションビーム式サスペンション装置は、左右一対のトレーリングアーム１０と、トーションビーム２０を備えている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the entire torsion beam suspension apparatus according to the embodiment, and this torsion beam suspension apparatus includes a pair of left and right trailing arms 10 and a torsion beam 20.

両トレーリングアーム１０は、軸線方向に湾曲した円筒状のパイプで構成されており、前端部に固定されたブッシュ１１によって車体ＢＤに略水平軸線回りに回動可能に支持されるとともに、後端部に組み付けられた図示を省略するキャリアなどの車輪側部材を介して車輪Ｗ，Ｗを支持している。   Both trailing arms 10 are constituted by cylindrical pipes that are curved in the axial direction, and are supported by the vehicle body BD so as to be rotatable about a substantially horizontal axis by a bush 11 fixed to the front end, and the rear end. Wheels W and W are supported via wheel side members such as a carrier (not shown) assembled to the part.

トレーリングアーム１０の車両内側後部には、スプリングシート１２がそれぞれ設けられている。スプリングシート１２は、側壁端にてトレーリングアーム１０およびトーションビーム２０に溶接されており、底壁にてコイルスプリング１３を支持している。コイルスプリング１３は、上端にて車体ＢＤを支持している。トレーリングアーム１０の車両内側であってスプリングシート１２の車両後方側には、ショックアブソーバ１４がそれぞれ設けられている。ショックアブソーバ１４は、下端に固定された支持リングによってトレーリングアーム１０に溶接されたブラケットに回動可能に支持されており、上端にて車体ＢＤを支持している。   Spring seats 12 are respectively provided at the vehicle rear side of the trailing arm 10. The spring seat 12 is welded to the trailing arm 10 and the torsion beam 20 at the side wall end, and supports the coil spring 13 at the bottom wall. The coil spring 13 supports the vehicle body BD at the upper end. Shock absorbers 14 are respectively provided on the vehicle inner side of the trailing arm 10 and on the vehicle rear side of the spring seat 12. The shock absorber 14 is rotatably supported by a bracket welded to the trailing arm 10 by a support ring fixed to the lower end, and supports the vehicle body BD at the upper end.

トーションビーム２０は、車両の幅方向に延設されていて、両端部にて一対のトレーリングアーム１０の中間部にそれぞれ接続されている。トーションビーム２０は、円筒状のパイプで構成されており、その軸線方向中間部２１が押し潰されて横断面を略Ｖ字状とする外側曲げ部２１ａと内側曲げ部２１ｂを備えている（図２参照）。トーションビーム２０の外側端部２２，２２は、その横断面が円を僅かに押し潰した筒状に形成されており、その端面が対向するトレーリングアーム１０の外周面に沿うように所定の形状に切断された接続部２２ａとされていて、その接続部２２ａにてトレーリングアーム１０に溶接されている。   The torsion beam 20 extends in the width direction of the vehicle, and is connected to an intermediate portion of the pair of trailing arms 10 at both ends. The torsion beam 20 is formed of a cylindrical pipe, and includes an outer bending portion 21a and an inner bending portion 21b whose axial cross section 21 is crushed and has a substantially V-shaped cross section (FIG. 2). reference). The outer end portions 22 and 22 of the torsion beam 20 are formed in a cylindrical shape whose cross section is slightly crushed in a circle, and the end surface thereof has a predetermined shape along the outer peripheral surface of the opposing trailing arm 10. The connection portion 22a is cut and welded to the trailing arm 10 at the connection portion 22a.

外側曲げ部２１ａと内側曲げ部２１ｂとは、図２に示すように、それらの頂部２１ａ１，２１ｂ１にてそれぞれ当接している。外側曲げ部２１ａおよび内側曲げ部２１ｂの各端部２１ａ２，２１ｂ２間には、押し潰されていない中空部２１ｃが形成されるとともに、外側曲げ部２１ａおよび内側曲げ部２１ｂの各中間部間には、所定の隙間２１ｄが形成されている。また、外側曲げ部２１ａと内側曲げ部２１ｂ間には、オイル、グリスなどの潤滑剤が塗布または封入されている。   As shown in FIG. 2, the outer bent portion 21a and the inner bent portion 21b are in contact with each other at their top portions 21a1 and 21b1. A hollow portion 21c that is not crushed is formed between the end portions 21a2 and 21b2 of the outer bent portion 21a and the inner bent portion 21b, and between the intermediate portions of the outer bent portion 21a and the inner bent portion 21b. A predetermined gap 21d is formed. A lubricant such as oil or grease is applied or sealed between the outer bent portion 21a and the inner bent portion 21b.

隙間２１ｄは、頂部２１ａ１，２１ｂ１における当接端から端部２１ａ２，２１ｂ２における中空部２１ｃに向かうに従って連続的に大きくなるように所定の間隔で形成されている。すなわち、隙間２１ｄの間隔は、左右車輪Ｗ，Ｗが逆位相（上下逆方向）に変位してトーションビーム２０がトレーリングアーム１０を介して捩られたとき、外側曲げ部２１ａと内側曲げ部２１ｂとの摺接による異音の発生を抑制することができ、しかも同ビーム２０の捩り剛性が所定の値となる程度に充分大きく設定されている。   The gap 21d is formed at a predetermined interval so as to continuously increase from the contact end at the top portions 21a1 and 21b1 toward the hollow portion 21c at the end portions 21a2 and 21b2. That is, when the left and right wheels W, W are displaced in opposite phases (upward and downward directions) and the torsion beam 20 is twisted via the trailing arm 10, the gap 21d is spaced from the outer bent portion 21a and the inner bent portion 21b. The generation of abnormal noise due to the sliding contact of the beam 20 can be suppressed, and the torsional rigidity of the beam 20 is set to a sufficiently large value to a predetermined value.

上記のように構成した実施形態によれば、トーションビーム２０は、その外側曲げ部２１ａと内側曲げ部２１ｂとをそれぞれ頂部２１ａ１，２１ｂ１にて当接させる、すなわち同頂部２１ａ１，２１ｂ１において下型を上型に突き当てることにより成型される。このため、トーションビーム２０の横断面形状を均一化することができるので、同ビーム２０の捩り剛性を所定の値に設定したり、せん断中心Ｓを所定の位置に設定することが容易である（図２参照）。この場合、トーションビーム２０の横断面形状が略Ｖ字状であり、頂部２１ａ１，２１ｂ１がせん断中心Ｓの近傍に位置するので、同ビーム２０が捩られとき頂部２１ａ１，２１ｂ１間の相対移動は小さい。したがって、トーションビーム２０の捩れに伴い頂部２１ａ１，２１ｂ１からの異音の発生を少なくすることが可能である。このとき、外側曲げ部２１ａと内側曲げ部２１ｂ間に潤滑剤が塗布または封入されているので、異音が発生したとしても同異音を不快感を与えない程度の大きさまで低減させることができる。   According to the embodiment configured as described above, the torsion beam 20 causes the outer bent portion 21a and the inner bent portion 21b to abut on the top portions 21a1 and 21b1, respectively. Molded by hitting the mold. For this reason, since the cross-sectional shape of the torsion beam 20 can be made uniform, it is easy to set the torsional rigidity of the beam 20 to a predetermined value or set the shear center S to a predetermined position (FIG. 2). In this case, since the cross-sectional shape of the torsion beam 20 is substantially V-shaped and the top portions 21a1, 21b1 are located in the vicinity of the shear center S, the relative movement between the top portions 21a1, 21b1 is small when the beam 20 is twisted. Therefore, it is possible to reduce the generation of abnormal noise from the top portions 21a1 and 21b1 as the torsion beam 20 is twisted. At this time, since the lubricant is applied or enclosed between the outer bent portion 21a and the inner bent portion 21b, even if an abnormal noise is generated, the abnormal noise can be reduced to a level that does not cause discomfort. .

また、この実施形態によれば、トーションビーム２０における中間部２１の頂部２１ａ１，２１ｂ１から端部２１ａ２，２１ｂ２に向かうに従って外側曲げ部２１ａと内側曲げ部２１ｂ間に所定の隙間２１ｄが形成されている。これにより、トーションビーム２０の捩れに伴う外側曲げ部２１ａと内側曲げ部２１ｂ間での異音の発生を抑制することができる。そして、この隙間２１ｄを所定の大きさに設定することにより、トーションビーム２０の捩り剛性を変更することができる。したがって、中空部２１ｃの大きさを変えることに比してトーションビーム２０における横断面形状の変化が少なくなるので、捩り剛性を変更してもせん断中心Ｓの変化が小さくなる。すなわち、車両のステア特性を変化させずに、車両のロール剛性のみを変化させることが可能である。この場合、トーションビーム２０の外側曲げ部２１ａと内側曲げ部２１ｂは、隙間２１ｄを連続的に大きくするような形状に形成されているので、せん断中心Ｓの変化をより一層小さくすることができる。   Further, according to this embodiment, the predetermined gap 21d is formed between the outer bent portion 21a and the inner bent portion 21b from the top portions 21a1, 21b1 of the intermediate portion 21 in the torsion beam 20 toward the end portions 21a2, 21b2. Thereby, generation | occurrence | production of the noise between the outer side bending part 21a and the inner side bending part 21b accompanying the twist of the torsion beam 20 can be suppressed. The torsional rigidity of the torsion beam 20 can be changed by setting the gap 21d to a predetermined size. Therefore, since the change in the cross-sectional shape of the torsion beam 20 is less than changing the size of the hollow portion 21c, the change in the shear center S is reduced even if the torsional rigidity is changed. That is, it is possible to change only the roll rigidity of the vehicle without changing the steering characteristic of the vehicle. In this case, since the outer bent portion 21a and the inner bent portion 21b of the torsion beam 20 are formed in a shape that continuously increases the gap 21d, the change in the shear center S can be further reduced.

次に、上記実施形態に係るトーションビーム２０の変形例について説明する。なお、以下に述べる各種変形例の説明においては、上記実施形態と同一の部分には同一の符号を付して詳細な説明は省略する。第１の変形例に係るトーションビーム２０は、図３に示すように、上記実施形態と同様に、中間部２１における横断面を略Ｖ字状に形成したものである。外側曲げ部２１ａと内側曲げ部２１ｂは、それらの頂部２１ａ１，２１ｂ１にてそれぞれ当接している。外側曲げ部２１ａおよび内側曲げ部２１ｂの各端部２１ａ２，２１ｂ２間には中空部が形成されておらず、頂部２１ａ１，２１ｂ１における当接端から端部２１ａ２，２１ｂ２までに渡って連続的に大きくなる所定の隙間２１ｄが形成されている。また、外側曲げ部２１ａと内側曲げ部２１ｂ間には、オイル、グリスなどの潤滑剤が塗布または封入されている。   Next, a modification of the torsion beam 20 according to the above embodiment will be described. In the description of the various modifications described below, the same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. As shown in FIG. 3, the torsion beam 20 according to the first modification has a substantially V-shaped cross section at the intermediate portion 21 as in the above embodiment. The outer bent portion 21a and the inner bent portion 21b are in contact with each other at their top portions 21a1 and 21b1. A hollow portion is not formed between the end portions 21a2 and 21b2 of the outer bent portion 21a and the inner bent portion 21b, and continuously increases from the contact ends of the top portions 21a1 and 21b1 to the end portions 21a2 and 21b2. A predetermined gap 21d is formed. A lubricant such as oil or grease is applied or sealed between the outer bent portion 21a and the inner bent portion 21b.

第２の変形例に係るトーションビーム２０は、図４に示すように、中間部２１における横断面を略Ｕ字状に形成したものである。外側曲げ部２１ａと内側曲げ部２１ｂは、それらの頂部２１ａ１，２１ｂ１にてそれぞれ当接しており、頂部２１ａ１，２１ｂ１から中間部２１ａ３，２１ｂ３に渡って連続的に大きくなる所定の隙間２１ｄが形成されている。隙間２１ｄは中間部２１ａ３，２１ｂ３において最大となり、同中間部２１ａ３，２１ｂ３から端部２１ａ２，２１ｂまでは略同一間隙の中空部２１ｃが形成されている。外側曲げ部２１ａと内側曲げ部２１ｂ間には、オイル、グリスなどの潤滑剤が塗布または封入されている。   As shown in FIG. 4, the torsion beam 20 according to the second modification has a substantially U-shaped cross section at the intermediate portion 21. The outer bent portion 21a and the inner bent portion 21b are in contact with each other at their top portions 21a1, 21b1, and a predetermined gap 21d is formed which continuously increases from the top portions 21a1, 21b1 to the intermediate portions 21a3, 21b3. ing. The gap 21d is maximum in the intermediate portions 21a3 and 21b3, and a hollow portion 21c having substantially the same gap is formed from the intermediate portions 21a3 and 21b3 to the end portions 21a2 and 21b. A lubricant such as oil or grease is applied or enclosed between the outer bent portion 21a and the inner bent portion 21b.

第３の変形例に係るトーションビーム２０は、図５に示すように、中間部２１における横断面の上方を図３と同様な略Ｖ字状に形成するとともに、下方を図４に示した略Ｕ字状の端部と同様に形成したものである。外側曲げ部２１ａと内側曲げ部２１ｂは、それらの頂部２１ａ１，２１ｂ１にてそれぞれ当接している。外側曲げ部２１ａおよび内側曲げ部２１ｂの各頂部２１ａ１，２１ｂ１における当接端から中間部２１ａ３，２１ｂ３に向かうに従って連続的に大きくなる所定の隙間２１ｄが形成されている。隙間２１ｄは中間部２１ａ３，２１ｂ３において最大となり、同中間部２１ａ３，２１ｂ３から端部２１ａ２，２１ｂまでは略同一間隙の中空部２１ｃが形成されている。外側曲げ部２１ａと内側曲げ部２１ｂ間には、オイル、グリスなどの潤滑剤が塗布または封入されている。   As shown in FIG. 5, the torsion beam 20 according to the third modification is formed in a substantially V shape similar to that of FIG. It is formed in the same manner as the letter-shaped end. The outer bent portion 21a and the inner bent portion 21b are in contact with each other at their top portions 21a1 and 21b1. A predetermined gap 21d is formed which continuously increases from the abutting ends of the apex portions 21a1, 21b1 of the outer bent portion 21a and the inner bent portion 21b toward the intermediate portions 21a3, 21b3. The gap 21d is maximum in the intermediate portions 21a3 and 21b3, and a hollow portion 21c having substantially the same gap is formed from the intermediate portions 21a3 and 21b3 to the end portions 21a2 and 21b. A lubricant such as oil or grease is applied or enclosed between the outer bent portion 21a and the inner bent portion 21b.

これら第１〜第３変形例に係るトーションビーム２０によっても、上記実施形態に係るトーションビーム２０と同様に、同ビーム２０の捩り剛性を所定の値に設定したり、せん断中心を所定の位置に設定することが容易である。また、トーションビーム２０の捩れに伴う異音の発生を抑制することが可能である。また、せん断中心の変化を小さくしながら、捩り剛性を変更することもできる。   Similarly to the torsion beam 20 according to the above-described embodiment, the torsional rigidity of the beam 20 is set to a predetermined value or the shear center is set to a predetermined position by the torsion beam 20 according to the first to third modifications. Is easy. In addition, it is possible to suppress the generation of abnormal noise accompanying torsion of the torsion beam 20. Further, the torsional rigidity can be changed while reducing the change in the shear center.

以上、本発明の一実施形態および各種変形例について説明したが、本発明の実施にあたっては、上記実施形態および各種変形例に限定されるものではなく、本発明の目的を逸脱しない限りにおいて種々の変更が可能である。   Although one embodiment and various modifications of the present invention have been described above, the present invention is not limited to the above embodiment and various modifications, and various modifications can be made without departing from the object of the present invention. It can be changed.

例えば、上記実施形態および各種変形例においては、トーションビーム２０の中間部２１における外側曲げ部２１ａと内側曲げ部２１ｂが、隙間２１ｄを連続的に大きくする形状を有するようにして、捩り剛性の変更に伴うせん断中心の変化をより一層小さくした。しかし、これに限らず、隙間の中心線に対して外側曲げ部と内側曲げ部間とを対称的に配置するようにすれば、隙間を非連続的に大きくする形状を有するようにしてもよい。これによっても、捩り剛性の変更に伴うせん断中心の変化を小さくすることができる。   For example, in the above-described embodiment and various modifications, the outer bending portion 21a and the inner bending portion 21b in the intermediate portion 21 of the torsion beam 20 have a shape that continuously increases the gap 21d, thereby changing the torsional rigidity. The accompanying change in the shear center was further reduced. However, the present invention is not limited to this, and the gap may be discontinuously enlarged if the outer bent portion and the inner bent portion are arranged symmetrically with respect to the center line of the gap. . This also makes it possible to reduce the change in the shear center associated with the change in torsional rigidity.

また、上記実施形態および各種変形例においては、外側曲げ部２１ａと内側曲げ部２１ｂ間にオイル、グリスなどの潤滑剤を塗布または封入して、外側曲げ部２１ａと内側曲げ部２１ｂ間からの異音の発生をより効果的に抑制した。しかし、外側曲げ部２１ａと内側曲げ部２１ｂ間の当接部位の大きさを小さくし、および／または隙間２１ｄの大きさを大きくすることにより、潤滑剤を用いなくても上記異音の発生を抑制することが可能である。   In the above embodiment and various modifications, a lubricant such as oil or grease is applied or enclosed between the outer bent portion 21a and the inner bent portion 21b, so that the difference between the outer bent portion 21a and the inner bent portion 21b is different. The generation of sound was suppressed more effectively. However, by reducing the size of the contact portion between the outer bent portion 21a and the inner bent portion 21b and / or increasing the size of the gap 21d, the above abnormal noise can be generated without using a lubricant. It is possible to suppress.

本発明の実施形態および各種変形例に係るトーションビーム式サスペンション装置を示す斜視図である。It is a perspective view which shows the torsion beam type suspension apparatus which concerns on embodiment and various modifications of this invention. 本発明の上記実施形態に係るトーションビームの中間部における横断面図である。It is a transverse cross section in the middle part of the torsion beam concerning the above-mentioned embodiment of the present invention. 本発明の第１変形例に係るトーションビームの中間部における横断面図である。It is a transverse cross section in the middle part of the torsion beam concerning the 1st modification of the present invention. 本発明の第２変形例に係るトーションビームの中間部における横断面図である。It is a transverse cross section in the middle part of the torsion beam concerning the 2nd modification of the present invention. 本発明の第３変形例に係るトーションビームの中間部における横断面図である。It is a transverse cross section in the middle part of the torsion beam concerning the 3rd modification of the present invention.

符号の説明Explanation of symbols

１０…トレーリングアーム、２０…トーションビーム、２１…中間部、２１ａ…外側曲げ部、２１ｂ…内側曲げ部、２１ｃ…中空部、２１ｄ…隙間、２１ａ１，２１ｂ１…頂部、２１ａ２，２１ｂ２…端部
DESCRIPTION OF SYMBOLS 10 ... Trailing arm, 20 ... Torsion beam, 21 ... Middle part, 21a ... Outer bending part, 21b ... Inner bending part, 21c ... Hollow part, 21d ... Clearance, 21a1, 21b1 ... Top part, 21a2, 21b2 ... End part

Claims (3)

車両の幅方向に延設されていて、両端部が左右一対のトレーリングアームにそれぞれ接続されたトーションビームを備えたトーションビーム式サスペンション装置において、
前記トーションビームを円筒状のパイプで構成し、前記パイプの軸線方向中間部を押し潰して同中間部の横断面を略Ｖ字状または略Ｕ字状に形成し、前記押し潰して形成された中間部における外側曲げ部と内側曲げ部とを各頂部にて当接させ、かつ前記外側曲げ部と内側曲げ部間に前記各頂部を除く領域にて所定の隙間を形成したことを特徴とするトーションビーム式サスペンション装置。 In a torsion beam suspension device provided with a torsion beam extending in the width direction of the vehicle and having both ends connected to a pair of left and right trailing arms,
The torsion beam is formed of a cylindrical pipe, and the intermediate portion formed by crushing the axial intermediate portion of the pipe to form a substantially V-shaped or substantially U-shaped cross section of the intermediate portion, and crushing the intermediate portion. A torsion beam characterized in that an outer bent portion and an inner bent portion are brought into contact with each other at each apex, and a predetermined gap is formed between the outer bent portion and the inner bent portion in a region excluding each apex. Suspension system. 請求項１に記載したトーションビーム式サスペンション装置において、
前記外側曲げ部と内側曲げ部は、前記隙間を前記各頂部における当接端から略Ｖ字状または略Ｕ字状の端部に向かうに従って連続的に大きくする形状を有するものであるトーションビーム式サスペンション装置。 In the torsion beam suspension device according to claim 1,
The torsion beam suspension in which the outer bent portion and the inner bent portion have a shape in which the gap is continuously increased from the abutting end at each top toward the substantially V-shaped or substantially U-shaped end. apparatus. 請求項１または２に記載したトーションビーム式サスペンション装置において、
前記外側曲げ部と内側曲げ部間に、潤滑剤が塗布または封入されているトーションビーム式サスペンション装置。
In the torsion beam suspension device according to claim 1 or 2,
A torsion beam suspension device in which a lubricant is applied or enclosed between the outer bent portion and the inner bent portion.
JP2004124962A 2004-04-21 2004-04-21 Torsion beam suspension system Expired - Fee Related JP4211667B2 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009014396A1 (en) * 2007-07-25 2009-01-29 Posco Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof
EP2098391A1 (en) * 2008-03-07 2009-09-09 Benteler Automobiltechnik GmbH Compound steer axle and method for its manufacture
WO2014118915A1 (en) 2013-01-30 2014-08-07 新日鐵住金株式会社 Torsion beam, torsion beam assembly, torsion beam-type suspension device
WO2014147827A1 (en) * 2013-03-22 2014-09-25 株式会社ヨロズ Torsion beam suspension device
US8894080B2 (en) 2008-05-12 2014-11-25 Nippon Steel & Sumitomo Metal Corporation Press-forming method of tubular part having cross section of irregular shape, and tubular part having cross section of irregular shape formed by the press-forming method
US9132713B1 (en) 2014-03-18 2015-09-15 Mazda Motor Corporation Suspension of vehicle
CN108312803A (en) * 2017-01-16 2018-07-24 浙江摩多巴克斯科技股份有限公司 A kind of high-strength sealed Formula V shape chassis torsion beam
DE102007058582B4 (en) 2007-07-20 2022-06-15 Hyundai Motor Co. Torsion beam of a vehicle suspension

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007058582B4 (en) 2007-07-20 2022-06-15 Hyundai Motor Co. Torsion beam of a vehicle suspension
WO2009014396A1 (en) * 2007-07-25 2009-01-29 Posco Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof
US8308175B2 (en) 2007-07-25 2012-11-13 Posco Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof
EP2098391A1 (en) * 2008-03-07 2009-09-09 Benteler Automobiltechnik GmbH Compound steer axle and method for its manufacture
US8894080B2 (en) 2008-05-12 2014-11-25 Nippon Steel & Sumitomo Metal Corporation Press-forming method of tubular part having cross section of irregular shape, and tubular part having cross section of irregular shape formed by the press-forming method
WO2014118915A1 (en) 2013-01-30 2014-08-07 新日鐵住金株式会社 Torsion beam, torsion beam assembly, torsion beam-type suspension device
US9573436B2 (en) 2013-01-30 2017-02-21 Nippon Steel & Sumitomo Metal Corporation Torsion beam, torsion beam assembly, and torsion beam type suspension system
WO2014147827A1 (en) * 2013-03-22 2014-09-25 株式会社ヨロズ Torsion beam suspension device
US9132713B1 (en) 2014-03-18 2015-09-15 Mazda Motor Corporation Suspension of vehicle
DE102015002276A1 (en) 2014-03-18 2015-09-24 Mazda Motor Corporation Suspension for a vehicle and method of forming the same
DE102015002276B4 (en) 2014-03-18 2019-06-27 Mazda Motor Corporation Suspension for a vehicle and method of forming the same
CN108312803A (en) * 2017-01-16 2018-07-24 浙江摩多巴克斯科技股份有限公司 A kind of high-strength sealed Formula V shape chassis torsion beam

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