JP4432691B2 - Torsion beam suspension system - Google Patents

Torsion beam suspension system Download PDF

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Publication number
JP4432691B2
JP4432691B2 JP2004265165A JP2004265165A JP4432691B2 JP 4432691 B2 JP4432691 B2 JP 4432691B2 JP 2004265165 A JP2004265165 A JP 2004265165A JP 2004265165 A JP2004265165 A JP 2004265165A JP 4432691 B2 JP4432691 B2 JP 4432691B2
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torsion beam
arms
vehicle
pair
arm
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JP2006076513A (en
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昌宏 大金
智史 村田
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Toyota Motor Corp
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Toyota Motor Corp
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Priority to JP2004265165A priority Critical patent/JP4432691B2/en
Priority to EP05785805A priority patent/EP1794008A1/en
Priority to CNA2005800306529A priority patent/CN101018681A/en
Priority to PCT/JP2005/017204 priority patent/WO2006030921A1/en
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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
    • 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
    • B60G2204/122—Mounting of torsion springs
    • B60G2204/1226—Mounting of torsion springs on the trailing arms of a twist beam type arrangement
    • 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
    • B60G2206/20—Constructional features of semi-rigid axles, e.g. twist beam type axles
    • B60G2206/202—Constructional features of semi-rigid axles, e.g. twist beam type axles with a radially deformed tube as a cross member
    • 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
    • B60G2206/203—Constructional features of semi-rigid axles, e.g. twist beam type axles with outwardly bent trailing arms to increase the width of the support or wheelbase
    • 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
    • B60G2206/82—Joining
    • B60G2206/8201—Joining by welding

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

Description

本発明は、トーションビームおよび左右一対のトレーリングア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 torsion beam and a pair of left and right trailing arms.

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、車両の幅方向に延設したトーションビームの軸線方向両外側部を車両後方へ向けてそれぞれ曲げるとともに、両曲げ部近傍にそれぞれアームを車両前方に向けて延設して、トーションビームの軸線方向両外側部および両アームによって左右一対のトレーリングアームを構成するようにしたものが知られている。トーションビームは、両アームを介して車体に略水平軸線回りに回動可能に組み付けられ、曲げられた軸線方向両外側端にて左右後輪をそれぞれ組み付けるようになっている。   Conventionally, as this type of torsion beam suspension device, as described in Patent Document 1 below, for example, both axially outer side portions of a torsion beam extending in the vehicle width direction are bent toward the rear of the vehicle. A pair of left and right trailing arms is known in which both arms are extended in the vicinity of both bent portions toward the front of the vehicle, and both the outer side portions and both arms in the axial direction of the torsion beam. The torsion beam is assembled to the vehicle body via both arms so as to be rotatable about a substantially horizontal axis, and the left and right rear wheels are assembled at both bent outer ends in the axial direction.

また、これとは逆に、車両の幅方向に延設したトーションビームの軸線方向両外側部を車両前方へ向けてそれぞれ曲げるとともに、両曲げ部近傍にそれぞれアームを車両後方に向けて延設して、トーションビームの両外側部および両アームによって左右一対のトレーリングアームを構成するようにしたものも知られている。トーションビームは、曲げられた軸線方向両外側端にて車体に略水平軸線回りに回動可能に組み付けられ、各アームを介して左右後輪をそれぞれ組み付けるようになっている。
特開２０００−３１８４２０号公報 On the contrary, the torsion beam extending in the width direction of the vehicle bends both outer portions in the axial direction toward the front of the vehicle and extends the arm toward the rear of the vehicle near both bent portions. There is also known a configuration in which a pair of left and right trailing arms are constituted by both outer side portions and both arms of a torsion beam. The torsion beam is assembled to the vehicle body so as to be rotatable about a substantially horizontal axis line at both outer ends in the bent axial direction, and the left and right rear wheels are assembled through the arms.
JP 2000-318420 A

一般に、車両外観の見栄えを良くしたり、操縦安定性を向上させるなどの理由から、同一の車種間で、左右後輪の車両幅方向の中心間距離すなわち車両のトレッドを複数種類設定することがある。しかし、上記した従来のトーションビーム式サスペンション装置の前者のタイプにおいて車両のトレッドを変更するためには、車両のトレッドに応じて長さが異なる複数のトーションビームを用意しなければならない。また、トーションビームの長さが変われば、各アームの車体への組み付け位置も変わるので、同アームを車体に組み付けるためには、同アームの車体への組み付け位置を変更するか、車体への組み付け位置に適合するように同アームの形状を変えて車両のトレッドに応じて形状が異なる複数のアームを用意しなければならない。   In general, for the purpose of improving the appearance of the vehicle and improving the handling stability, it is possible to set multiple distances between the centers of the left and right rear wheels in the vehicle width direction, that is, the vehicle tread, between the same vehicle types. is there. However, in order to change the tread of the vehicle in the former type of the conventional torsion beam suspension device described above, a plurality of torsion beams having different lengths according to the tread of the vehicle must be prepared. Also, if the length of the torsion beam changes, the assembly position of each arm to the vehicle body also changes, so in order to assemble the arm to the vehicle body, the assembly position of the arm to the vehicle body can be changed or the assembly position to the vehicle body A plurality of arms having different shapes according to the tread of the vehicle must be prepared by changing the shape of the arm so as to conform to the above.

一方、上記した従来のトーションビーム式サスペンション装置の後者のタイプにおいて車両のトレッドを変更するためには、長さが異なる複数のトーションビームを用意する必要はないが、車両のトレッドに応じて形状が異なる複数のアームを用意しなければならない。上記のように、車両のトレッドを複数設定するためには、車両のトレッドに応じて異なるサイズのトーションビームおよびアームを用意しなければならない等のため、サスペンション装置が高価になるという問題がある。   On the other hand, in order to change the tread of the vehicle in the latter type of the conventional torsion beam type suspension device described above, it is not necessary to prepare a plurality of torsion beams having different lengths, but a plurality of different shapes depending on the tread of the vehicle. Arms must be prepared. As described above, in order to set a plurality of vehicle treads, it is necessary to prepare torsion beams and arms of different sizes according to the vehicle tread, and thus there is a problem that the suspension device becomes expensive.

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、車両のトレッドを変更可能なトーションビーム式サスペンション装置を安価に構成することにある。   The present invention has been made to cope with the above-described problems, and an object of the present invention is to inexpensively configure a torsion beam suspension device capable of changing the tread of a vehicle.

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たトーションビームであって、その軸線方向両外側部を、両端からそれぞれ所定の長さに渡って同じ横断面形状に形成し、かつ車軸線に対してそれぞれ平行に延設されるように構成したトーションビームと、前記トーションビームの軸線方向両外側部にそれぞれ接続された左右一対のトレーリングアームとを備え、前記左右一対のトレーリングアームを、車両の前後方向に延設されて各後端部にて前記トーションビームの軸線方向両外側部にそれぞれ接続されるとともに各前端部にて車体に略水平軸線回りにそれぞれ回動可能に組み付けられた左右一対の第１アームと、車両の前後方向に延設されて各前端部にて前記トーションビームの軸線方向両外側部にそれぞれ接続されるとともに各後端部に左右後輪をそれぞれ組み付けた左右一対の第２アームとで構成したトーションビーム式サスペンション装置において、前記左右一対の第１アームを、それぞれ開断面形状を有する板材又は閉断面形状を有するパイプ材で構成するとともに、後端部に前記トーションビームの軸線方向両外側部に当接する切り欠きを設け、前記所定の長さに渡る軸線方向両外側部の外周面上であって、前記左右一対の第１アームの前端部をそれぞれ車体への組み付け位置に合わせた状態で、前記切り欠きが前記軸線方向両外側部の端部から車両内側に位置するように、前記左右一対の第１アームを前記切り欠き位置にて前記トーションビームの軸線方向両外側部に溶接によりそれぞれ一体的に接続し、前記左右一対の第２アームを、それぞれ開断面形状を有する板材又は閉断面形状を有するパイプ材で構成するとともに、前端部に前記トーションビームの軸線方向両外側部に当接する切り欠きを設け、前記所定の長さに渡る軸線方向両外側部の外周面であって、車両のトレッドに合わせた状態で、前記切り欠きが前記軸線方向両外側部の端部から車両内側に位置するように、前記左右一対の第２アームを前記切り欠き位置にて前記トーションビームの軸線方向両外側部に溶接によりそれぞれ一体的に接続したことにある。 In order to achieve the above object, a feature of the present invention is a torsion beam extending in the width direction of a vehicle, and both axially outer portions thereof have the same cross-sectional shape over a predetermined length from both ends. formed, and a torsion beam which is configured to be parallel to extend respectively the axle beam, wherein a pair of left and right trailing arms which are connected in the axial direction both outside portions of the torsion beam, the pair of left and right The trailing arm is extended in the longitudinal direction of the vehicle and is connected to both outer sides in the axial direction of the torsion beam at each rear end, and can be rotated around the substantially horizontal axis on the vehicle body at each front end. A pair of left and right first arms assembled to each other, and extending in the front-rear direction of the vehicle and connected to both outer ends in the axial direction of the torsion beam at respective front end portions. In preparative Activation beam type suspension apparatus constructed in the pair of second arm assembly respectively the left right rear wheel Rutotomoni rear ends, the pair of left and right first arm, plate each have an open cross-section or The pipe is made of a pipe material having a closed cross-sectional shape, and is provided with notches that are in contact with both outer sides in the axial direction of the torsion beam at the rear end portion, on the outer peripheral surface of the both outer sides in the axial direction over the predetermined length. Thus, the pair of left and right left and right first arms are positioned so that the notch is located on the vehicle inner side from the ends of the two axially outer side portions in a state where the front end portions of the pair of left and right first arms are respectively aligned with the assembly position to the vehicle body. The first arms of the torsion beam are integrally connected to both outer sides in the axial direction of the torsion beam by welding at the notch position, and the pair of left and right second arms are connected thereto. It is made of a plate material having an open cross-sectional shape or a pipe material having a closed cross-sectional shape, and is provided with notches that contact both outer side portions in the axial direction of the torsion beam at the front end portion, and both outer sides in the axial direction over the predetermined length. The pair of left and right second arms are notched so that the notches are positioned on the inner side of the vehicle from the ends of the two axially outer sides in a state of being aligned with the tread of the vehicle. respectively by welding in the axial direction both outside portions of the torsion beam at the location Ru near the integrally connected.

これによれば、各第１アームの前端部をそれぞれ車体への組み付け位置に合わせた状態で同各アームの後端部をトーションビームの軸線方向両外側部にそれぞれ接続し、変更しようとする車両のトレッドに合わせた状態で各第２アームの前端部をトーションビームの軸線方向両外側部にそれぞれ接続することによって、車両のトレッドを複数種類設定することができる。したがって、一種類のトーションビーム、第１および第２アームを用いるだけで車両のトレッドを変更することが可能であり、サスペンション装置を安価に構成することができる。また、これによれば、同一の車種に限らず、異なる車種にも適用可能である。この場合には、トーションビーム、第１および第２アームを共通した部品として使用可能であり、サスペンション装置を一層安価に構成することができる。   According to this, the rear end of each arm is connected to both outer sides in the axial direction of the torsion beam in a state where the front end of each first arm is aligned with the assembly position on the vehicle body. By connecting the front end portions of the second arms to the both outer side portions in the axial direction of the torsion beam in a state matched to the tread, a plurality of types of vehicle treads can be set. Therefore, the tread of the vehicle can be changed only by using one type of torsion beam and the first and second arms, and the suspension device can be configured at low cost. Moreover, according to this, it is applicable not only to the same vehicle type but to a different vehicle type. In this case, the torsion beam and the first and second arms can be used as common parts, and the suspension device can be configured at a lower cost.

また、本発明の他の特徴は、前記一対の第１アームを構成する部材の肉厚を、前記一対の第２アームを構成する部材の肉厚よりも薄くしたことにある。一般に、第１アームの方が、第２アームに比して曲げによる荷重負担が少ないと考えられ、第１アームの曲げ剛性を第２アームの曲げ剛性よりも低く設定することが可能である。したがって、これによれば第１アームと第２アームとで別々に断面形状や肉厚などを設定することができるので、各アームの曲げ剛性を確保した上で、同時に軽量化を図ることが可能である。   Another feature of the present invention resides in that the thickness of the members constituting the pair of first arms is made thinner than the thickness of the members constituting the pair of second arms. In general, the first arm is considered to have less load load due to bending than the second arm, and the bending rigidity of the first arm can be set lower than the bending rigidity of the second arm. Therefore, according to this, since the cross-sectional shape and thickness can be set separately for the first arm and the second arm, it is possible to simultaneously reduce the weight while ensuring the bending rigidity of each arm. It is.

また、本発明の他の特徴は、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を略Ｕ字状または略Ｖ字状の横断面を有するように形成し、かつ前記パイプの軸線方向両外側部をそれぞれ両端から所定の長さに渡って同じ円筒状の横断面を有するように形成したことにある。   Another feature of the present invention is that the torsion beam is formed of a cylindrical pipe, and the intermediate portion in the axial direction of the pipe is crushed so that the intermediate portion has a substantially U-shaped or substantially V-shaped cross section. And both the outer side portions in the axial direction of the pipe are formed so as to have the same cylindrical cross section over a predetermined length from both ends.

これによれば、横断面形状の違いから、トーションビームの軸線方向両外側部は、その軸線方向中間部に比して捩り変形し難くなっている。このため、トーションビームが捩られた状態にあっても、各第１および第２アームとトーションビームとの接続状態が共に良好に維持されて、接続部位の強度が確保される。また、トーションビームの軸線方向両外側部は、それぞれ両端から所定の長さに渡って同じ円筒状の横断面を有するように形成されている。したがって、車両のトレッドを変更しても、各第１および第２アームとトーションビームとがそれぞれ一定の当接長で接続されるので、車両のトレッドの変更に際して、各接続部位の強度を簡単に検討することができる。   According to this, due to the difference in the cross-sectional shape, the axially both outer side portions of the torsion beam are less likely to be torsionally deformed than the axially intermediate portion. For this reason, even when the torsion beam is twisted, the connection state between each of the first and second arms and the torsion beam is well maintained, and the strength of the connection portion is ensured. Further, both outer side portions in the axial direction of the torsion beam are formed so as to have the same cylindrical cross section from both ends over a predetermined length. Therefore, even if the vehicle tread is changed, the first and second arms and the torsion beam are connected to each other with a constant contact length. Therefore, when changing the vehicle tread, the strength of each connection portion can be easily considered. can do.

また、本発明の他の特徴は、前記トーションビームの両端が、栓部材によって閉じられていることにある。これによれば、栓部材によってトーションビームの両端における断面変形が効果的に抑止されて同両端の捩り剛性をより高く設定することが可能になり、各第１および第２アームとトーションビームとの接続部位の強度がより良好に確保されることになる。また、同ビーム内への粉塵、泥などの異物の侵入を防止することもできる。   Another feature of the present invention is that both ends of the torsion beam are closed by plug members. According to this, the cross-sectional deformation at both ends of the torsion beam is effectively suppressed by the plug member, and the torsional rigidity at the both ends can be set higher, and the connection portion between each first and second arm and the torsion beam This will ensure better strength. It is also possible to prevent foreign matter such as dust and mud from entering the beam.

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る。このトーションビーム式サスペンション装置は、トーションビーム１０および左右一対のトレーリングアーム２０Ｌ，２０Ｒ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 type suspension apparatus according to the embodiment. The torsion beam suspension device includes a torsion beam 10 and a pair of left and right trailing arms 20L and 20R.

トーションビーム１０は、円筒状のパイプで構成されており、車両の幅方向に延設されている。トーションビーム１０の軸線方向中間部１１は、図１および図２に示すように、押し潰されて横断面が略Ｖ字状に形成されている。トーションビーム１０の軸線方向外側部１２，１３は、それぞれ両端から所定の長さに渡って同じ楕円状の横断面を有するように形成されており、左右後輪Ｗrl，Ｗrrの回転中心線である車軸線に対して平行に延設されている。   The torsion beam 10 is formed of a cylindrical pipe and extends in the vehicle width direction. As shown in FIGS. 1 and 2, the axially intermediate portion 11 of the torsion beam 10 is crushed and has a substantially V-shaped cross section. The axially outer portions 12 and 13 of the torsion beam 10 are formed so as to have the same elliptical cross section from both ends over a predetermined length, and are axles that are the rotation center lines of the left and right rear wheels Wrl and Wrr. It extends parallel to the line.

トーションビーム１０の両端は、それぞれ栓部材１４，１４によって閉じられている。栓部材１４，１４は、トーションビーム１０の両端内周面に沿って当接可能な楕円状の板材により構成されており、例えば溶接によって同内周面にそれぞれ固定されている。トーションビーム１０は、軸線方向外側部１２，１３にて左右一対のトレーリングアーム２０Ｌ，２０Ｒにそれぞれ接続されている。   Both ends of the torsion beam 10 are closed by plug members 14 and 14, respectively. The plug members 14 and 14 are made of an elliptical plate that can come into contact with the inner peripheral surfaces at both ends of the torsion beam 10, and are fixed to the inner peripheral surfaces by welding, for example. The torsion beam 10 is connected to a pair of left and right trailing arms 20L and 20R at axially outer portions 12 and 13, respectively.

各トレーリングアーム２０Ｌ，２０Ｒは、それぞれ第１および第２アーム２１Ｌ，２２Ｌ、２１Ｒ，２２Ｒで構成されている。各トレーリングアーム２０Ｌ，２０Ｒは同様に構成されているので、右側のトレーリングアーム２０Ｒを構成する第１および第２アーム２１Ｒ，２２Ｒについてのみ具体的に説明して、同第１および第２アーム２１Ｒ，２２Ｒと同一の部材には同一の符号を付して左側の第１および第２アーム２１Ｌ，２２Ｌの詳しい説明を省略する。   Each trailing arm 20L, 20R includes a first arm 21L, a second arm 21L, 21R, 22R. Since each of the trailing arms 20L and 20R is configured in the same manner, only the first and second arms 21R and 22R constituting the right trailing arm 20R will be described in detail, and the first and second arms will be described. The same members as 21R and 22R are denoted by the same reference numerals, and detailed description of the left first and second arms 21L and 22L is omitted.

第１アーム２１Ｒは、図１および図２に示すように、トーションビーム１０よりも若干量だけ薄い肉厚を有する断面略Ｕ字状の曲げ板材で構成されている。第１アーム２１Ｒは、開口部２３を車両内側に向けた状態で車両前後方向に延設されている。第１アーム２１Ｒの側壁２４の後端部には、トーションビーム１０の軸線方向外側部１３の前側外周面に沿って当接可能な略Ｕ字状の切り欠き２４ａが形成されている。第１アーム２１Ｒは、側壁２４の切り欠き２４ａにて、例えば溶接によってトーションビーム１０の軸線方向外側部１３に一体的に接続されている。   As shown in FIGS. 1 and 2, the first arm 21 </ b> R is formed of a bent plate material having a substantially U-shaped cross section having a thickness slightly smaller than that of the torsion beam 10. The first arm 21R extends in the vehicle front-rear direction with the opening 23 facing the vehicle inside. A substantially U-shaped cutout 24a that can be brought into contact with the outer peripheral surface of the axially outer side portion 13 of the torsion beam 10 is formed at the rear end portion of the side wall 24 of the first arm 21R. The first arm 21R is integrally connected to the axially outer side portion 13 of the torsion beam 10 by, for example, welding at a notch 24a of the side wall 24.

第１アーム２１Ｒの側壁２４の前端部には、円筒状のブッシュ組み付け部２４ｂが開口部２３側に突出した状態で固着されている。第１アーム２１Ｒは、ブッシュ組み付け部２４ｂ内にブッシュ２５が組み付けられた状態で、ブッシュ２５を貫通したボルト２６およびナット２７を介して、サイドメンバに代表される車体ＢＤに固定したブラケット２８，２８に略水平軸線回りに回動可能に組み付けられている（図３参照）。   A cylindrical bush assembly 24b is fixed to the front end of the side wall 24 of the first arm 21R in a state of protruding to the opening 23 side. The first arm 21R has brackets 28, 28 fixed to a vehicle body BD typified by a side member via a bolt 26 and a nut 27 penetrating the bush 25 in a state where the bush 25 is assembled in the bush assembly portion 24b. Are assembled so as to be rotatable about a substantially horizontal axis (see FIG. 3).

この場合、ブラケット２８，２８は、車両のトレッドにかかわらず、車体ＢＤの所定位置に固定されるようになっている。したがって、車両のトレッドを変更した場合であっても、第１アーム２１Ｒのトーションビーム１０に対する接続位置は一定であり、側壁２４の切り欠き２４ａがトーションビーム１０の軸線方向外側部１３の端部から所定長さだけ車両内側に位置するようになっている。   In this case, the brackets 28 and 28 are fixed to a predetermined position of the vehicle body BD regardless of the tread of the vehicle. Therefore, even when the tread of the vehicle is changed, the connection position of the first arm 21R to the torsion beam 10 is constant, and the notch 24a of the side wall 24 has a predetermined length from the end of the axially outer portion 13 of the torsion beam 10. That's why it is located inside the vehicle.

なお、第１アーム２１Ｒは、ボルト２６の軸線が車両前方に向かうに従って車両の前後方向中心線に近づくように、側壁２４の中間部にて車両の斜め前方かつ外側に向けて略水平状に屈曲している。   The first arm 21R bends substantially horizontally at an intermediate portion of the side wall 24 toward the front and outside of the vehicle so that the axis of the bolt 26 approaches the center line in the longitudinal direction of the vehicle as it goes forward. is doing.

第２アーム２２Ｒは、図１および図３に示すように、トーションビーム１０とほぼ同じ肉厚を有する断面方形状の長尺パイプで構成されていて、車両の前後方向に延設されている。第２アーム２２Ｒの内側壁３１および外側壁３２の前端部には、トーションビーム１０の軸線方向外側部１３の後側外周面に沿って当接可能な略Ｕ字状の切り欠き３１ａ，３２ａがそれぞれ形成されている。第２アーム２２Ｒは、内側壁３１の切り欠き３１ａおよび外側壁３２の切り欠き３２ａにて、例えば溶接によってトーションビーム１０の軸線方向外側部１３に一体的に接続されている。   As shown in FIGS. 1 and 3, the second arm 22 </ b> R is configured by a long pipe having a rectangular cross section having substantially the same thickness as the torsion beam 10, and extends in the front-rear direction of the vehicle. At the front end portions of the inner side wall 31 and the outer side wall 32 of the second arm 22R, substantially U-shaped cutouts 31a and 32a that can abut along the rear outer peripheral surface of the axially outer side portion 13 of the torsion beam 10 are respectively provided. Is formed. The second arm 22R is integrally connected to the axially outer side portion 13 of the torsion beam 10 by, for example, welding at the notch 31a of the inner wall 31 and the notch 32a of the outer wall 32.

この場合、車両のトレッドを最大幅に設定したときに、外側壁３２の切り欠き３２ａがトーションビーム１０の軸線方向外側部１３の端部から所定長さだけ車両内側に位置するようになっている。すなわち、トーションビーム１０は、車両のトレッドを最大幅に設定したときであっても、外側壁３２の切り欠き３２ａと軸線方向外側部１３との当接状態を確保し得る全長に設定されている。   In this case, when the vehicle tread is set to the maximum width, the notch 32a of the outer wall 32 is positioned on the vehicle inner side by a predetermined length from the end of the axially outer portion 13 of the torsion beam 10. That is, the torsion beam 10 is set to a full length that can ensure a contact state between the notch 32a of the outer wall 32 and the axially outer portion 13 even when the vehicle tread is set to the maximum width.

また、第２アーム２２Ｒは、前端部から車両の斜め後方かつ外側に向けて水平状に延設した後端部にて図示を省略するスピンドルを介して右後輪Ｗrrを組み付けている。第２アーム２２Ｒの内側壁３１の中間部には、車両内側に向けて突出したショックアブソーバ組み付け部３１ｂが形成されている。ショックアブソーバ組み付け部３１ｂには、ショックアブソーバＳＡがその下端部にてブッシュ３３、段付きボルト３４およびナット３５を介して回動可能に組み付けられている。   Further, the second arm 22R is assembled with a right rear wheel Wrr via a spindle (not shown) at a rear end portion extending horizontally from the front end portion toward an obliquely rearward and outer side of the vehicle. A shock absorber assembling portion 31b that protrudes toward the inside of the vehicle is formed at an intermediate portion of the inner wall 31 of the second arm 22R. A shock absorber SA is assembled to the shock absorber assembling portion 31b via a bush 33, a stepped bolt 34 and a nut 35 so as to be rotatable at its lower end.

上記のように構成した実施形態においては、図３および図４に示すように、第１アーム２１Ｒの前端部に組み付けたブッシュ２５を車体ＢＤのブラケット２８，２８に組み付けできる所定位置に合わせた状態で、同アーム２１Ｒを側壁２４の切り欠き２４ａにてトーションビーム１０の軸線方向外側部１３に接続するようにする。また、変更しようとする車両のトレッドに合わせた状態で、第２アーム２２Ｒを内側壁３１および外側壁３２の切り欠き３１ａ，３２ａにてトーションビーム１０の軸線方向外側部１３に接続するようにする。第１および第２アーム２１Ｌ，２２Ｌについても、第１および第２アーム２１Ｒ，２２Ｒと同様にして、トーションビーム１０の軸線方向外側部１２に接続するようにする。   In the embodiment configured as described above, as shown in FIGS. 3 and 4, the bush 25 assembled to the front end of the first arm 21 </ b> R is in a predetermined position where it can be assembled to the brackets 28, 28 of the vehicle body BD. Thus, the arm 21R is connected to the outer side portion 13 in the axial direction of the torsion beam 10 through the notch 24a of the side wall 24. Further, the second arm 22R is connected to the axially outer side portion 13 of the torsion beam 10 at the cutouts 31a and 32a of the inner side wall 31 and the outer side wall 32 in a state matched with the tread of the vehicle to be changed. The first and second arms 21L and 22L are also connected to the axially outer side portion 12 of the torsion beam 10 in the same manner as the first and second arms 21R and 22R.

これにより、一種類のトーションビーム１０、第１および第２アーム２１Ｌ，２２Ｌ、２１Ｒ，２２Ｒを用いるだけで車両のトレッドを複数種類設定することが可能であり、サスペンション装置を安価に構成することができる。この場合、車両のトレッドに応じて第１アーム２１Ｌ，２１Ｒの車体ＢＤへの組み付け位置すなわちブラケット２８，２８の車体ＢＤへの固定位置を変更する必要もないので、同一の車種において車体ＢＤの種類を増やさずに済む。   Thereby, it is possible to set a plurality of types of vehicle treads only by using one type of torsion beam 10 and the first and second arms 21L, 22L, 21R, 22R, and the suspension device can be configured at low cost. . In this case, there is no need to change the assembly position of the first arms 21L and 21R to the vehicle body BD, that is, the fixing position of the brackets 28 and 28 to the vehicle body BD, according to the tread of the vehicle. No need to increase

一方、同一の車種に適用する場合に限らず、第１アーム２１Ｌ，２１Ｒの車体ＢＤへの組み付け位置が異なる別の車種にも適用可能である。この場合には、第１アーム２１Ｌ，２１Ｒの車体ＢＤへの組み付け位置に応じて、第１アーム２１Ｌ，２１Ｒのトーションビーム１０に対する接続位置を変えればよい。これによれば、トーションビーム１０、第１および第２アーム２１Ｌ，２２Ｌ、２１Ｒ，２２Ｒを共通した部品として使用可能であり、サスペンション装置を一層安価に構成することが可能である。   On the other hand, the present invention is not limited to the case where the first arm 21L, 21R is mounted on the vehicle body BD, and is not limited to the case where the first arm 21L is applied to the same vehicle type. In this case, the connection positions of the first arms 21L and 21R with respect to the torsion beam 10 may be changed according to the positions where the first arms 21L and 21R are assembled to the vehicle body BD. According to this, the torsion beam 10 and the first and second arms 21L, 22L, 21R, and 22R can be used as common parts, and the suspension device can be configured at a lower cost.

また、上記実施形態によれば、第１アーム２１Ｌ，２１Ｒを断面略Ｕ字状に形成するとともに、第１アーム２１Ｌ，２１Ｒを構成する板材の肉厚を、第２アーム２２Ｌ，２２Ｒを構成するパイプの肉厚よりも薄くした。これは、一般に第１アーム２１Ｌ，２１Ｒの方が、第２アーム２２Ｌ，２２Ｒに比して曲げによる荷重負担が少ないため、第１アーム２１Ｌ，２１Ｒの曲げ剛性を第２アーム２２Ｌ，２２Ｒの曲げ剛性よりも低く設定できるからである。このように、第１アーム２１Ｌ，２１Ｒと第２アーム２２Ｌ，２２Ｒとで別々に断面形状や肉厚などを設定することができるので、各アームの曲げ剛性を確保した上で、同時に軽量化を図ることも可能である。   Moreover, according to the said embodiment, while forming 1st arm 21L, 21R in a cross-sectional substantially U shape, the thickness of the board | plate material which comprises 1st arm 21L, 21R comprises 2nd arm 22L, 22R. It was made thinner than the wall thickness of the pipe. This is because the first arm 21L, 21R generally has a smaller load burden due to bending than the second arm 22L, 22R, so that the bending rigidity of the first arm 21L, 21R is the bending strength of the second arm 22L, 22R. This is because it can be set lower than the rigidity. In this way, the first arm 21L, 21R and the second arm 22L, 22R can be set separately in cross-sectional shape, wall thickness, etc., so that while ensuring the bending rigidity of each arm, the weight can be reduced at the same time. It is also possible to plan.

また、上記実施形態によれば、横断面形状の違いから、トーションビーム１０の軸線方向外側部１２，１３は、その軸線方向中間部１１に比して捩り変形し難くなっている。このため、トーションビーム１０が捩られた状態にあっても、第１および第２アーム２１Ｌ，２２Ｌ、２１Ｒ，２２Ｒとトーションビーム１０の軸線方向外側部１２，１３との接続状態が良好に維持されて、接続部位の強度が確保される。   Further, according to the above embodiment, due to the difference in cross-sectional shape, the axially outer portions 12 and 13 of the torsion beam 10 are less likely to be twisted and deformed than the axially intermediate portion 11. For this reason, even if the torsion beam 10 is in a twisted state, the connection state between the first and second arms 21L, 22L, 21R, 22R and the axially outer portions 12, 13 of the torsion beam 10 is well maintained, The strength of the connection site is ensured.

特に、上記実施形態によれば、トーションビーム１０の両端が栓部材１４，１４によってそれぞれ閉じられている。したがって、栓部材１４，１４によってトーションビーム１０の両端における断面変形が効果的に抑止されて同両端の捩り剛性をより高く設定することが可能になり、第１および第２アーム２１Ｌ，２２Ｌ、２１Ｒ，２２Ｒとトーションビーム１０の軸線方向外側部１２，１３との接続部位の強度がより良好に確保されるようになっている。なお、栓部材１４，１４によって同ビーム１０内への粉塵、泥などの異物の侵入も良好に防止される。   In particular, according to the above embodiment, both ends of the torsion beam 10 are closed by the plug members 14 and 14, respectively. Therefore, the cross-section deformation at both ends of the torsion beam 10 is effectively suppressed by the plug members 14 and 14, and the torsional rigidity at the both ends can be set higher, and the first and second arms 21L, 22L, 21R, The strength of the connecting portion between 22R and the axially outer side portions 12 and 13 of the torsion beam 10 is ensured better. It should be noted that the plug members 14 can satisfactorily prevent foreign matter such as dust and mud from entering the beam 10.

また、上記実施形態によれば、第１アーム２１Ｌ，２１Ｒとトーションビーム１０の軸線方向外側部１２，１３とが、車両のトレッドに関わらず、それぞれ一定の当接長で接続される。また、第２アーム２２Ｌ，２２Ｒとトーションビーム１０の軸線方向外側部１２，１３とが、第１アーム２１Ｌ，２１Ｒと同様、車両のトレッドに関わらず、それぞれ同じ一定の当接長で接続される。したがって、車両のトレッドの変更に際して、各接続部位における強度を簡単に検討することができる。   Further, according to the above embodiment, the first arms 21L and 21R and the axially outer side portions 12 and 13 of the torsion beam 10 are connected to each other with a constant contact length regardless of the tread of the vehicle. The second arms 22L and 22R and the axially outer portions 12 and 13 of the torsion beam 10 are connected with the same constant contact length regardless of the tread of the vehicle, like the first arms 21L and 21R. Therefore, when changing the tread of the vehicle, the strength at each connection site can be easily examined.

以上、本発明の一実施形態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 of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the object of the present invention.

例えば、上記実施形態においては、第１アーム２１Ｌ，２１Ｒとして、断面略Ｕ字状の板材を用いたが、これに代えて、例えば閉断面形状のパイプを用いてもよい。また、第２アーム２２Ｌ，２２Ｒとして、断面方形状のパイプを用いたが、これに代えて、例えば開断面形状の板材を用いてもよい。また、トーションビーム１０として円筒状のパイプを用いたが、これに代えて、例えば、横断面を略Ｕ字状またはＶ字状に形成した長尺状の板材を用いてもよい。   For example, in the above embodiment, a plate material having a substantially U-shaped cross section is used as the first arms 21L and 21R. However, instead, for example, a pipe having a closed cross section may be used. Further, as the second arms 22L and 22R, pipes having a square cross section are used, but instead, for example, plate members having an open cross section may be used. Moreover, although the cylindrical pipe was used as the torsion beam 10, it may replace with this and may use the elongate board | plate material which formed the cross section in the substantially U shape or V shape, for example.

本発明による一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を示す概略斜視図である。1 is a schematic perspective view showing a torsion beam suspension device according to an embodiment of the present invention. 図１のトーションビーム式サスペンション装置の右後輪側を車両の前方および内側から見た拡大斜視図である。FIG. 2 is an enlarged perspective view of the right rear wheel side of the torsion beam suspension device of FIG. 1 as viewed from the front and the inside of the vehicle. 図１のトーションビーム式サスペンション装置の右後輪側を車両の後方および内側から見た拡大斜視図である。FIG. 2 is an enlarged perspective view of the right rear wheel side of the torsion beam suspension device of FIG. 1 as viewed from the rear and inside of the vehicle. 図１のトーションビーム式サスペンション装置の右後輪側を示す平面図である。FIG. 2 is a plan view showing a right rear wheel side of the torsion beam suspension device of FIG. 1.

符号の説明Explanation of symbols

ＢＤ…車体、１０…トーションビーム、１１…軸線方向中間部、１２，１３…軸線方向外側部、１４，１４…栓部材、２０Ｌ，２０Ｒ…トレーリングアーム、２１Ｌ，２１Ｒ…第１アーム、２２Ｌ，２２Ｒ…第２アーム
BD ... Car body, 10 ... Torsion beam, 11 ... Axis direction intermediate part, 12, 13 ... Axial direction outer side part, 14,14 ... Plug member, 20L, 20R ... Trailing arm, 21L, 21R ... First arm, 22L, 22R ... second arm

Claims (4)

車両の幅方向に延設されたトーションビームであって、その軸線方向両外側部を、両端からそれぞれ所定の長さに渡って同じ横断面形状に形成し、かつ車軸線に対してそれぞれ平行に延設されるように構成したトーションビームと、
前記トーションビームの軸線方向両外側部にそれぞれ接続された左右一対のトレーリングアームとを備え、
前記左右一対のトレーリングアームを、
車両の前後方向に延設されて各後端部にて前記トーションビームの軸線方向両外側部にそれぞれ接続されるとともに各前端部にて車体に略水平軸線回りにそれぞれ回動可能に組み付けられた左右一対の第１アームと、
車両の前後方向に延設されて各前端部にて前記トーションビームの軸線方向両外側部にそれぞれ接続されるとともに各後端部に左右後輪をそれぞれ組み付けた左右一対の第２アームとで構成したトーションビーム式サスペンション装置において、
前記左右一対の第１アームを、それぞれ開断面形状を有する板材又は閉断面形状を有するパイプ材で構成するとともに、後端部に前記トーションビームの軸線方向両外側部に当接する切り欠きを設け、前記所定の長さに渡る軸線方向両外側部の外周面上であって、前記左右一対の第１アームの前端部をそれぞれ車体への組み付け位置に合わせた状態で、前記切り欠きが前記軸線方向両外側部の端部から車両内側に位置するように、前記左右一対の第１アームを前記切り欠き位置にて前記トーションビームの軸線方向両外側部に溶接によりそれぞれ一体的に接続し、
前記左右一対の第２アームを、それぞれ開断面形状を有する板材又は閉断面形状を有するパイプ材で構成するとともに、前端部に前記トーションビームの軸線方向両外側部に当接する切り欠きを設け、前記所定の長さに渡る軸線方向両外側部の外周面上であって、車両のトレッドに合わせた状態で、前記切り欠きが前記軸線方向両外側部の端部から車両内側に位置するように、前記左右一対の第２アームを前記切り欠き位置にて前記トーションビームの軸線方向両外側部に溶接によりそれぞれ一体的に接続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。 A torsion beam extending in the width direction of a vehicle, both axially outer portions thereof having the same cross-sectional shape over a predetermined length from both ends, and extending parallel to the axle A torsion beam configured to be installed ,
A pair of left and right trailing arms respectively connected to both axially outer side portions of the torsion beam;
The pair of left and right trailing arms
Left and right extending in the front-rear direction of the vehicle and connected to both outer sides in the axial direction of the torsion beam at each rear end and assembled to the vehicle body at each front end so as to be rotatable about a substantially horizontal axis. A pair of first arms;
Consists of a second arm of the pair assembled respectively left right rear wheel to the rear ends while being respectively connected to the axially outer sides of said torsion beam in longitudinal direction extending to be the front end of the vehicle in the preparative Activation beam type suspension apparatus,
The left and right pair of first arms are each composed of a plate member having an open cross-sectional shape or a pipe member having a closed cross-sectional shape, and provided with notches that contact both outer side portions in the axial direction of the torsion beam at the rear end portion, On the outer peripheral surfaces of both axial outer sides over a predetermined length, with the front ends of the pair of left and right first arms respectively aligned with the assembly position on the vehicle body, the notches are arranged in both axial directions. The pair of left and right first arms are integrally connected to both outer sides in the axial direction of the torsion beam by welding at the notch positions so as to be located on the vehicle inner side from the end of the outer part,
The pair of left and right second arms are each made of a plate material having an open cross-sectional shape or a pipe material having a closed cross-sectional shape, and provided with notches that contact both outer side portions in the axial direction of the torsion beam at the front end portion. On the outer peripheral surface of both axial outer sides over the length of the vehicle, and in a state matched to the tread of the vehicle, the notch is located on the inner side of the vehicle from the ends of the outer axial both sides. A torsion beam suspension device, wherein a pair of left and right second arms are integrally connected to both outer sides in the axial direction of the torsion beam at the notch positions by welding. 前記一対の第１アームを構成する部材の肉厚を、前記一対の第２アームを構成する部材の肉厚よりも薄くした請求項１に記載したトーションビーム式サスペンション装置。 The pair of the thickness of the first member constituting the arms, torsion beam suspension apparatus according to claim 1 which is thinner than the thickness of the member constituting the pair of second arms. 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を略Ｕ字状または略Ｖ字状の横断面を有するように形成し、かつ前記パイプの軸線方向両外側部をそれぞれ各端から所定の長さに渡って同じ円筒状の横断面を有するように形成した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 ,
The torsion beam is formed of a cylindrical pipe, and the intermediate portion in the axial direction of the pipe is crushed so that the intermediate portion has a substantially U-shaped or substantially V-shaped cross section, and the axis of the pipe A torsion beam suspension device in which both outer portions in the direction are formed so as to have the same cylindrical cross section over a predetermined length from each end. 前記トーションビームの両端は、栓部材によって閉じられている請求項３に記載したトーションビーム式サスペンション装置。 The torsion beam suspension device according to claim 3 , wherein both ends of the torsion beam are closed by plug members.
JP2004265165A 2004-09-13 2004-09-13 Torsion beam suspension system Expired - Fee Related JP4432691B2 (en)

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CNA2005800306529A CN101018681A (en) 2004-09-13 2005-09-12 Torsion-beam-type suspension apparatus
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