JP2000272313A - Torque rod - Google Patents
Torque rodInfo
- Publication number
- JP2000272313A JP2000272313A JP11078994A JP7899499A JP2000272313A JP 2000272313 A JP2000272313 A JP 2000272313A JP 11078994 A JP11078994 A JP 11078994A JP 7899499 A JP7899499 A JP 7899499A JP 2000272313 A JP2000272313 A JP 2000272313A
- Authority
- JP
- Japan
- Prior art keywords
- outer diameter
- torque rod
- pipe
- connecting pipe
- pair
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- B60G2206/10—Constructional features of arms
- B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、車両の車軸と車体
とを連結し、車軸の駆動トルクや制動トルクによる過大
な回転を防いで車軸のトランピング（地たんだ運動）や
ワインドアップ等を抑制するトルクロッドに関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an axle of a vehicle connected to a vehicle body to prevent excessive rotation due to a driving torque or braking torque of the axle to prevent axle tramping (winding) and windup. It relates to a torque rod to be suppressed.
【０００２】[0002]
【従来の技術】従来、トルクロッドとして、図２に示す
ように、電縫鋼管（帯鋼の成形ロールにより形成された
管状体の接合部が電気抵抗溶接法により接合された管）
により形成された連結パイプ２の両端に炭素鋼の鍛造に
より形成された一対のエンド部材３，３がフリクション
溶接法又はかしめによりそれぞれ接合されたものが知ら
れている。このトルクロッド１では、エンド部材３が環
状部３ａと、この環状部３ａと一体的に形成された接続
用突出部３ｂからなり、接続用突出部３ｂの端面には環
状部３ａに向って所定の内径を有する穴３ｃが形成され
る。また連結パイプ２及び接続用突出部３ｂの外径は略
同一に形成される。上記従来のトルクロッドでは、連結
パイプ２及びエンド部材３がいずれも鋼製であるため、
重量が大きく、車両重量を増大する一因になっていた。2. Description of the Related Art Conventionally, as a torque rod, as shown in FIG. 2, an electric resistance welded steel pipe (a pipe in which a joining portion of a tubular body formed by a forming roll of steel strip is joined by an electric resistance welding method).
A pair of end members 3 and 3 formed by forging carbon steel at both ends of a connecting pipe 2 formed by the above-described method is joined by friction welding or caulking. In this torque rod 1, the end member 3 is composed of an annular portion 3a and a connecting projection 3b formed integrally with the annular portion 3a. The end surface of the connecting projection 3b has a predetermined shape facing the annular portion 3a. Is formed. The outer diameters of the connecting pipe 2 and the connecting projection 3b are substantially the same. In the above conventional torque rod, since both the connecting pipe 2 and the end member 3 are made of steel,
It was heavy and contributed to the increase in vehicle weight.
【０００３】この点を解消するために、連結パイプがア
ルミニウム合金の押出し成形により形成され、この連結
パイプの両端にアルミニウム合金製の一対のエンド部材
が接合されたトルクロッドが開示されている（特開平９
−１１７２１号）。このトルクロッドでは、エンド部材
又は連結パイプがＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金
の鍛造材又は押出し材を所定の熱処理を施して得られた
アルミニウム合金により形成される。一方、エンド部材
又は連結パイプはＡｌ−Ｚｎ−Ｍｎ系アルミニウム合金
の鍛造品又は押出し材を所定の熱処理を施して得られた
アルミニウム合金により形成される。このように構成さ
れたトルクロッドでは、Ｍｇ2Ｓｉ系析出物の作用を有
効に活用することができ、かつマクロ組織の結晶成長を
抑制することができるので、微細なＭｇ2Ｓｉ系化合物
の析出によって必要な強度を確保できる。この結果、鋼
製のトルクロッドと略同一の寸法及び形状で鋼製のトル
クロッドに匹敵する特性を有するアルミニウム製のトル
クロッドを得ることができ、トルクロッドの軽量化を図
ることができる。In order to solve this problem, there is disclosed a torque rod in which a connecting pipe is formed by extrusion of an aluminum alloy and a pair of end members made of an aluminum alloy are joined to both ends of the connecting pipe. Kaihei 9
-111721). In this torque rod, the end member or the connecting pipe is formed of an aluminum alloy obtained by subjecting a forged material or an extruded material of an Al-Mg-Si-based aluminum alloy to a predetermined heat treatment. On the other hand, the end member or the connecting pipe is formed of an aluminum alloy obtained by subjecting a forged product or an extruded material of an Al-Zn-Mn-based aluminum alloy to a predetermined heat treatment. In the thus constructed torque rod, it is possible to effectively utilize the effect of Mg 2 Si based precipitate, and it is possible to suppress the crystal growth of the macrostructure, the precipitation of fine Mg 2 Si compound Thus, necessary strength can be secured. As a result, it is possible to obtain an aluminum torque rod having substantially the same size and shape as the steel torque rod and having characteristics comparable to the steel torque rod, and it is possible to reduce the weight of the torque rod.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記従来の特
開平９−１１７２１号公報に示されたトルクロッドで
は、連結パイプ及び接続用突出部の外径が略同一である
ため、これらの外径は大きな曲げモーメントが作用する
連結パイプの中央の外径で決定され、比較的小さな曲げ
モーメントが作用する連結パイプの両端や接続用突出部
の外径は必要以上に大きく、重量が未だ大きい不具合が
あった。本発明の目的は、所定の強度及び剛性（曲げ剛
性及び捩り剛性）を確保しながら軽量化及び省スペース
化を図ることができるトルクロッドを提供することにあ
る。However, in the conventional torque rod disclosed in Japanese Patent Application Laid-Open No. Hei 9-11721, the outer diameters of the connecting pipe and the connecting projection are substantially the same. Is determined by the outer diameter of the center of the connecting pipe on which a large bending moment acts, and the outer diameter of both ends of the connecting pipe and the connecting projection on which a relatively small bending moment acts are unnecessarily large, and the weight is still large. there were. An object of the present invention is to provide a torque rod capable of achieving weight reduction and space saving while securing predetermined strength and rigidity (bending rigidity and torsional rigidity).
【０００５】[0005]
【課題を解決するための手段】請求項１に係る発明は、
図１に示すように、アルミニウム又はアルミニウム合金
により形成された連結パイプ１２と、アルミニウム又は
アルミニウム合金により形成され連結パイプ１２の両端
にそれぞれ接合されかつ環状部１３ａ，１３ａ及び接続
用突出部１３ｂ，１３ｂからなる一対のエンド部材１
３，１３とを備えたトルクロッドの改良である。その特
徴ある構成は、連結パイプ１２がその中央に設けられた
パイプ本体１２ａと、その両端に配設され外径がパイプ
本体１２ａの外径より小さく形成された一対の接続端部
１２ｂ，１２ｂと、パイプ本体１２ａの両端と一対の接
続端部１２ｂ，１２ｂとをそれぞれ連結しパイプ本体１
２ａの両端から一対の接続端部１２ｂ，１２ｂに向うに
従って次第に細くなるようにそれぞれ形成された一対の
テーパ部１２ｃ，１２ｃとを有し、接続用突出部１３ｂ
の外径が接続端部１２ｂの外径と略同一に形成されたと
ころにある。The invention according to claim 1 is
As shown in FIG. 1, a connecting pipe 12 made of aluminum or an aluminum alloy is joined to both ends of the connecting pipe 12 made of aluminum or an aluminum alloy, and has annular portions 13a, 13a and connecting projections 13b, 13b. A pair of end members 1
3 and 13 are improvements of the torque rod. The characteristic configuration thereof includes a pipe main body 12a in which the connecting pipe 12 is provided at the center thereof, and a pair of connection end portions 12b, 12b provided at both ends thereof and having an outer diameter smaller than that of the pipe main body 12a. , The two ends of the pipe body 12a and the pair of connection ends 12b, 12b are connected to each other,
A pair of tapered portions 12c, 12c formed so as to gradually become thinner from both ends of 2a toward the pair of connection end portions 12b, 12b, respectively, and a connection protruding portion 13b.
Is formed so as to be substantially the same as the outer diameter of the connection end 12b.
【０００６】この請求項１に記載されたトルクロッドで
は、強度及び剛性が鋼より小さいアルミニウム又はアル
ミニウム合金にてトルクロッド１１を形成する場合に
は、パイプ本体１２ａの外径を鋼製の連結パイプの外径
より大きくする。これにより材質を鋼からアルミニウム
又はアルミニウム合金に変更したときの強度及び剛性の
低下分を補う。また曲げ剛性及び捩り剛性に対して寄与
する程度の小さい接続端部１２ｂ及び接続用突出部１３
ｂの外径を上記連結パイプの外径より小さくする。これ
によりトルクロッド１１の取付スペースの自由度を増す
ことができる。一方、強度及び剛性が鋼と同等のアルミ
ニウム又はアルミニウム合金によりトルクロッド１１を
形成する場合には、パイプ本体１２ａの外径は鋼製の連
結パイプの外径と略同一でよい。また曲げ剛性に対して
寄与する程度の小さい接続端部１２ｂ及び接続用突出部
１３ｂの外径を上記連結パイプの外径より小さくする。
これによりトルクロッド１１の取付スペースの自由度を
上記より更に増すことができる。In the torque rod according to the first aspect, when the torque rod 11 is formed of aluminum or an aluminum alloy having strength and rigidity smaller than steel, the outer diameter of the pipe body 12a is changed to a steel connecting pipe. Larger than the outer diameter of This compensates for the decrease in strength and rigidity when the material is changed from steel to aluminum or aluminum alloy. In addition, the connection end portion 12b and the connection protrusion 13 which are small enough to contribute to bending rigidity and torsional rigidity.
The outer diameter of b is smaller than the outer diameter of the connecting pipe. Thereby, the degree of freedom of the mounting space for the torque rod 11 can be increased. On the other hand, when the torque rod 11 is formed of aluminum or aluminum alloy having the same strength and rigidity as steel, the outer diameter of the pipe body 12a may be substantially the same as the outer diameter of the steel connection pipe. Further, the outer diameters of the connecting end portion 12b and the connecting protrusion 13b, which are small enough to contribute to the bending rigidity, are made smaller than the outer diameter of the connecting pipe.
As a result, the degree of freedom of the mounting space for the torque rod 11 can be further increased.
【０００７】請求項２に係る発明は、請求項１に係る発
明であって、更に図１に示すように、パイプ本体１２ａ
の外径をＤ1とし、接続端部１２ｂの外径をＤ2とし、接
続用突出部１３ｂの外径をＤ3とするとき、０．５≦
（Ｄ2／Ｄ1）≦０．９５、かつ０．５≦（Ｄ3／Ｄ1）≦
０．９５の関係を満たすことを特徴とする。この請求項
２に記載されたトルクロッドでは、トルクロッド１１を
形成するアルミニウム又はアルミニウム合金の組成及び
熱処理により、その強度や剛性等が変化するので、（Ｄ
2／Ｄ1）及び（Ｄ3／Ｄ1）を上記範囲内で設定すること
によりトルクロッド１１の各部の強度及び剛性（曲げ剛
性及び捩り剛性）を確保することができる。The invention according to claim 2 is the invention according to claim 1, and further includes, as shown in FIG.
When the the outer diameter of D 1, an outer diameter of the connection end portion 12b and D 2, the outer diameter of the connection protruding portions 13b and D 3, 0.5 ≦
(D 2 / D 1 ) ≦ 0.95 and 0.5 ≦ (D 3 / D 1 ) ≦
It is characterized by satisfying a relationship of 0.95. In the torque rod according to the second aspect, the strength and rigidity of the aluminum or aluminum alloy forming the torque rod 11 are changed by the composition and heat treatment.
2 / D 1) and (D 3 / D 1) it is possible to secure the various parts of the strength and rigidity of the torque rod 11 (flexural rigidity and torsional rigidity) By setting within the above range.
【０００８】請求項３に係る発明は、請求項１又は２に
係る発明であって、更に図１に示すように、連結パイプ
１２とエンド部材１３とがフリクション溶接法，ＭＩＧ
溶接法又はＴＩＧ溶接法により接合されたことを特徴と
する。この請求項３に記載されたトルクロッドでは、連
結パイプ１２とエンド部材１３とをフリクション溶接法
により接合すれば、接合面の不純物被膜が粘性金属とと
もに外部に押出されて強力な固相接合が得られる。また
連結パイプ１２とエンド部材１３とをＭＩＧ溶接法（Me
tal Inert Gas welding）又はＴＩＧ溶接法（Tungsten
Inert Gas welding）により接合すれば、溶接時にフラ
ックスを全く使用しないのでスラグが発生せず、アーク
がアルミニウム又はアルミニウム合金の表面の酸化被膜
を自動的に除去できるので、良好な接合が可能となる。The invention according to claim 3 is the invention according to claim 1 or 2, wherein the connecting pipe 12 and the end member 13 are friction welded by MIG, as shown in FIG.
It is characterized by being joined by a welding method or a TIG welding method. In the torque rod according to the third aspect, if the connecting pipe 12 and the end member 13 are joined by the friction welding method, the impurity film on the joining surface is extruded to the outside together with the viscous metal to obtain a strong solid-state joining. Can be The connecting pipe 12 and the end member 13 are connected to each other by the MIG welding method (Me
tal Inert Gas welding) or TIG welding (Tungsten
When welding is performed by inert gas welding, no flux is used at the time of welding, so that slag does not occur, and the arc can automatically remove an oxide film on the surface of aluminum or an aluminum alloy, so that good welding can be performed.
【０００９】[0009]
【発明の実施の形態】次に本発明の実施の形態を図面に
基づいて説明する。図１に示すように、トルクロッド１
１はアルミニウム又はアルミニウム合金により形成され
た連結パイプ１２と、アルミニウム又はアルミニウム合
金により形成され連結パイプ１２の両端にそれぞれ接合
された一対のエンド部材１３，１３とを備える。エンド
部材１３は環状部１３ａと、この環状部１３ａと一体的
に形成された接続用突出部１３ｂからなる。接続用突出
部１３ｂの端面には環状部１３ａに向って所定の内径を
有する穴１３ｃが形成される。Embodiments of the present invention will now be described with reference to the drawings. As shown in FIG.
1 includes a connecting pipe 12 formed of aluminum or an aluminum alloy, and a pair of end members 13 formed of aluminum or an aluminum alloy and joined to both ends of the connecting pipe 12, respectively. The end member 13 includes an annular portion 13a and a connecting protruding portion 13b formed integrally with the annular portion 13a. A hole 13c having a predetermined inner diameter is formed on the end face of the connection protruding portion 13b toward the annular portion 13a.
【００１０】連結パイプ１２はその中央に設けられたパ
イプ本体１２ａと、その両端にそれぞれ設けられた一対
の接続端部１２ｂ，１２ｂと、パイプ本体１２ａの両端
と一対の接続端部１２ｂ，１２ｂとをそれぞれ連結する
一対のテーパ部１２ｃ，１２ｃとを有する。接続端部１
２ｂの外径はパイプ本体１２ａの外径より小さく形成さ
れ、接続用突出部１３ｂの外径は接続端部１２ｂの外径
と略同一に形成される。またテーパ部１２ｃの基端の外
径はパイプ本体１２ａと略同一に形成され、テーパ部１
２ｃの先端の外径は接続端部１２ｂと略同一に形成され
る、即ちテーパ部１２ｃは基端から先端に向うに従って
次第に細くなるように形成される。The connecting pipe 12 has a pipe body 12a provided at the center thereof, a pair of connecting ends 12b and 12b provided at both ends thereof, and a pair of connecting ends 12b and 12b provided at both ends of the pipe body 12a. Are connected to each other. Connection end 1
The outer diameter of 2b is formed smaller than the outer diameter of the pipe body 12a, and the outer diameter of the connecting projection 13b is formed to be substantially the same as the outer diameter of the connecting end 12b. The outer diameter of the base end of the tapered portion 12c is substantially the same as that of the pipe body 12a.
The outer diameter of the distal end of 2c is formed substantially the same as that of the connection end 12b, that is, the tapered portion 12c is formed so as to become gradually thinner from the base end toward the distal end.
【００１１】この連結パイプ１２をパイプ本体１２ａと
同一外径を有するアルミニウム又はアルミニウム合金の
押出しパイプを用いて形成する場合には、この押出しパ
イプの両端を塑性変形させてすぼめることにより形成さ
れ、連結パイプ１２を接続端部１２ｂと同一外径を有す
るアルミニウム又はアルミニウム合金の押出しパイプを
用いる場合には、この押出しパイプの中央を塑性変形さ
せて広げることにより形成される。上記塑性変形させる
加工法としては、へら絞り加工法，ハイドロフォーム
法，バルジ加工法，冷間鍛造法等が挙げられる。When the connecting pipe 12 is formed using an extruded pipe made of aluminum or aluminum alloy having the same outer diameter as the pipe body 12a, the connecting pipe 12 is formed by plastically deforming and shrinking both ends of the extruded pipe. When using an extruded pipe of aluminum or an aluminum alloy having the same outer diameter as the connection end 12b, the connecting pipe 12 is formed by plastically deforming and expanding the center of the extruded pipe. Examples of the processing method for plastic deformation include a spatula drawing method, a hydroforming method, a bulging method, and a cold forging method.
【００１２】パイプ本体１２ａの外径をＤ1とし、接続
端部１２ｂの外径をＤ2とし、接続用突出部１３ｂの外
径をＤ3とするとき、０．５≦（Ｄ2／Ｄ1）≦０．９
５、好ましくは０．７５≦（Ｄ2／Ｄ1）≦０．９、かつ
０．５≦（Ｄ3／Ｄ1）≦０．９５、好ましくは０．７５
≦（Ｄ3／Ｄ1）≦０．９の関係をそれぞれ満たすように
連結パイプ１２及びエンド部材１３はそれぞれ形成され
る。（Ｄ2／Ｄ1）及び（Ｄ3／Ｄ1）を０．５以上かつ
０．９５以下に限定したのは、（Ｄ2／Ｄ1）及び（Ｄ3
／Ｄ1）が０．５未満では、接続端部１２ｂ及び接続用
突出部１３ｂの所定の強度及び剛性（曲げ剛性及び捩り
剛性）を得ることができず、（Ｄ2／Ｄ1）及び（Ｄ3／
Ｄ1）が０．９５を超えると、接続端部１２ｂ及び接続
用突出部１３ｂが必要以上に大きくなり、重量が増大し
かつトルクロッド１１の取付スペース上の問題が生じる
からである。[0012] When the outer diameter of the pipe main body 12a and D 1, the outer diameter of the connection end portion 12b and D 2, the outer diameter of the connection protruding portions 13b and D 3, 0.5 ≦ (D 2 / D 1 ) ≦ 0.9
5, preferably 0.75 ≦ (D 2 / D 1 ) ≦ 0.9 and 0.5 ≦ (D 3 / D 1 ) ≦ 0.95, preferably 0.75
The connecting pipe 12 and the end member 13 are respectively formed so as to satisfy the relationship of ≦ (D 3 / D 1 ) ≦ 0.9. (D 2 / D 1 ) and (D 3 / D 1 ) are limited to 0.5 or more and 0.95 or less because (D 2 / D 1 ) and (D 3 / D 1 )
If / D 1 ) is less than 0.5, predetermined strength and rigidity (bending rigidity and torsional rigidity) of the connection end portion 12b and the connection protrusion 13b cannot be obtained, and (D 2 / D 1 ) and (D 2 / D 1 ) D 3 /
If D 1 ) exceeds 0.95, the connection end 12b and the connection projection 13b become unnecessarily large, increasing the weight and causing a problem in the space for mounting the torque rod 11.
【００１３】更に連結パイプ１２及びエンド部材１３の
接合はフリクション溶接法により行われる。即ち連結パ
イプ１２の接続端部１２ｂの端面とエンド部材１３の接
続用突出部１３ｂの端面とを突合せて加圧しながら接合
面に回転運動を起こさせ、このとき発生する摩擦熱を利
用して、連結パイプ１２及びエンド部材１３が接合され
る。このフリクション溶接法では、上記接合面及びその
近傍が摩擦熱により塑性流動を起こす温度に達し、摩擦
と滑りにより破壊された接合面の不純物被膜が粘性金属
とともに外部に押出されて強力な固相接合が得られるよ
うになっている。上記溶接後の接合部１４には「ばり」
１６，１７が発生する。「ばり」１６は接合部１４の外
周面に発生しかつ旋削された後の「ばり」であり、「ば
り」１７は接合部１４の内周面に発生しかつ旋削されて
いない状態の「ばり」である。Further, the joining of the connecting pipe 12 and the end member 13 is performed by a friction welding method. That is, the end face of the connecting end 12b of the connecting pipe 12 and the end face of the connecting protruding part 13b of the end member 13 are abutted and pressurized to cause a rotational motion on the joining surface, and the frictional heat generated at this time is used. The connection pipe 12 and the end member 13 are joined. In this friction welding method, the above-mentioned joint surface and its vicinity reach a temperature at which plastic flow occurs due to frictional heat, and the impurity film on the joint surface destroyed by friction and slip is extruded to the outside together with viscous metal, resulting in strong solid state welding. Is obtained. "Burr" is applied to the joint 14 after the welding.
16 and 17 occur. The “burr” 16 is a “burr” generated on the outer peripheral surface of the joint portion 14 and after being turned, and the “burr” 17 is a “burr” generated on the inner peripheral surface of the joint portion 14 and in an unturned state. ".
【００１４】なお、不活性ガスをシールドガスとする溶
極式ガスシールドアーク溶接法、即ちＭＩＧ溶接法によ
り、或いは不活性ガスをシールドガスとしかつタングス
テン電極を用いる非溶極式ガスシールドアーク溶接法、
即ちＴＩＧ溶接法により、連結パイプ及びエンド部材を
接合してもよい。上記ＭＩＧ溶接法又はＴＩＧ溶接法は
溶接時にフラックスを全く使用しないのでスラグが発生
しないこと、アークが金属表面の酸化被膜を自動的に除
去すること等の理由から、アルミニウム合金等の軽金属
の溶接に適している。また、トルクロッドは車軸と車体
とを連結し前後力を支えるラジアスロッドの他に、車軸
と車体とを連結し横方向の力を支えるラテラルロッドを
も含むものとし、トルクロッドの形状は一直線状のみな
らず、略Ｖ字状又はその他の形状であってもよい。A molten gas shielded arc welding method using an inert gas as a shielding gas, that is, a MIG welding method, or a non-fused gas shielded arc welding method using an inert gas as a shielding gas and a tungsten electrode ,
That is, the connecting pipe and the end member may be joined by the TIG welding method. The MIG welding method or the TIG welding method does not use any flux at the time of welding, so that slag does not occur, and the arc automatically removes an oxide film on the metal surface. Are suitable. The torque rod shall also include a lateral rod that connects the axle and the vehicle body and supports the lateral force, in addition to a radial rod that connects the axle and the vehicle body and supports the longitudinal force.If the torque rod is only linear, Instead, it may be substantially V-shaped or another shape.
【００１５】このように構成されたトルクロッド１１で
は、強度及び剛性が鋼より小さいアルミニウム又はアル
ミニウム合金にてトルクロッド１１を形成する場合に
は、連結パイプ１２のパイプ本体１２ａの外径を所定の
強度及び剛性（曲げ剛性及び捩り剛性）を確保するた
め、鋼製のトルクロッドの連結パイプの外径より大きく
する。これにより材質を鋼からアルミニウム又はアルミ
ニウム合金に変更したときの強度及び剛性の低下分を補
うことができる。また曲げ剛性及び捩り剛性に対して寄
与する程度の小さい連結パイプ１２の接続端部１２ｂ及
びエンド部材１３の接続用突出部１３ｂの外径を上記連
結パイプの外径より小さくする。これによりトルクロッ
ド１１の取付スペースの自由度を増すことができる。こ
の結果、パイプ本体１２ａの外径が鋼製の連結パイプの
外径より大きくなっているものの、比重が小さいので、
トルクロッド１１全体の重量を鋼製のトルクロッドより
も小さくすることができる。In the torque rod 11 configured as described above, when the torque rod 11 is formed of aluminum or aluminum alloy having strength and rigidity smaller than steel, the outer diameter of the pipe body 12a of the connecting pipe 12 is set to a predetermined value. In order to secure the strength and rigidity (bending rigidity and torsional rigidity), the outer diameter of the connecting pipe of the torque rod made of steel is made larger. This can compensate for the decrease in strength and rigidity when the material is changed from steel to aluminum or aluminum alloy. In addition, the outer diameter of the connection end 12b of the connecting pipe 12 and the outer diameter of the connecting protrusion 13b of the end member 13 which are small enough to contribute to the bending rigidity and the torsional rigidity are made smaller than the outer diameter of the connecting pipe. Thereby, the degree of freedom of the mounting space for the torque rod 11 can be increased. As a result, although the outer diameter of the pipe main body 12a is larger than the outer diameter of the steel connecting pipe, the specific gravity is small.
The weight of the entire torque rod 11 can be made smaller than that of a steel torque rod.
【００１６】一方、強度及び剛性が鋼と同等のアルミニ
ウム又はアルミニウム合金によりトルクロッド１１を形
成する場合には、パイプ本体１２ａの外径は鋼製の連結
パイプの外径と略同一でよい。また曲げ剛性及び捩り剛
性に対して寄与する程度の小さい接続端部１２ｂ及び接
続用突出部１３ｂの外径を連結パイプの外径より小さく
する。これによりトルクロッド１１の取付スペースを上
記より更に小さくすることができる。この結果、パイプ
本体１２ａの外径が鋼製の連結パイプの外径と略同一
で、比重が小さいので、トルクロッド１１全体の重量を
鋼製のトルクロッドより遥かに小さくすることができ
る。またトルクロッド１１の材質を鋼からアルミニウム
又はアルミニウム合金に変更したことで、材質の損失係
数（減衰率）が向上し、結果として車両のばね下振動が
車体（特にキャブ）に伝達されるのを低減することがで
きる。On the other hand, when the torque rod 11 is formed of aluminum or aluminum alloy having the same strength and rigidity as steel, the outer diameter of the pipe body 12a may be substantially the same as the outer diameter of the steel connection pipe. Further, the outer diameters of the connection end portion 12b and the connection protrusion 13b, which are small enough to contribute to bending rigidity and torsional rigidity, are made smaller than the outer diameter of the connecting pipe. Thereby, the mounting space for the torque rod 11 can be made smaller than the above. As a result, since the outer diameter of the pipe main body 12a is substantially the same as the outer diameter of the steel connection pipe and the specific gravity is small, the weight of the entire torque rod 11 can be made much smaller than that of the steel torque rod. Further, by changing the material of the torque rod 11 from steel to aluminum or aluminum alloy, the loss coefficient (damping rate) of the material is improved, and as a result, the unsprung vibration of the vehicle is transmitted to the vehicle body (particularly, the cab). Can be reduced.
【００１７】[0017]
【発明の効果】以上述べたように、本発明によれば、連
結パイプ及びエンド部材をアルミニウム又はアルミニウ
ム合金により形成し、連結パイプの接続端部の外径及び
エンド部材の接続用突出部の外径を略同一に形成しかつ
連結パイプのパイプ本体の中央の外径より小さく形成
し、更にパイプ本体の両端を接続端部に向うに従って次
第に細くなるテーパ部により連結したので、強度及び剛
性が鋼より小さいアルミニウム又はアルミニウム合金に
てトルクロッドを形成する場合には、パイプ本体の外径
が鋼製の連結パイプの外径より大きくなるけれども、接
続端部及び接続用突出部の外径が連結パイプの外径より
小さくすることができる。この結果、トルクロッドの取
付スペースを比較的小さくすることができ、重量の軽量
化を図ることができる。As described above, according to the present invention, the connecting pipe and the end member are formed of aluminum or an aluminum alloy, and the outer diameter of the connecting end of the connecting pipe and the outer diameter of the connecting protrusion of the end member are formed. Since the diameter of the pipe is formed to be substantially the same and smaller than the outer diameter of the center of the pipe body of the connecting pipe, and both ends of the pipe body are connected by tapered portions that gradually become thinner toward the connection end, the strength and rigidity are made of steel. When the torque rod is formed of smaller aluminum or aluminum alloy, the outer diameter of the pipe body is larger than the outer diameter of the steel connection pipe, but the outer diameter of the connection end and the connection protrusion is smaller than that of the connection pipe. Can be smaller than the outer diameter. As a result, the mounting space for the torque rod can be made relatively small, and the weight can be reduced.
【００１８】一方、強度及び剛性が鋼と同等のアルミニ
ウム又はアルミニウム合金によりトルクロッドを形成す
る場合には、パイプ本体の外径は鋼製の連結パイプの外
径と略同一でよく、しかも接続端部及び接続用突出部の
外径を連結パイプの外径より小さくすることができるの
で、トルクロッドの取付スペース及び重量を上記より更
に小さくすることができる。この結果、トルクロッドの
所定の強度及び剛性（曲げ剛性及び捩り剛性）を確保し
ながら、トルクロッドの軽量化及び省スペース化を図る
ことができる。なおトルクロッドの材質を鋼からアルミ
ニウム又はアルミニウム合金に変更したことで、材質の
損失係数（減衰率）が向上し、結果として車両のばね下
振動が車体（特にキャブ）に伝達されるのを低減するこ
とができる。On the other hand, when the torque rod is formed of aluminum or aluminum alloy having the same strength and rigidity as steel, the outer diameter of the pipe body may be substantially the same as the outer diameter of the steel connecting pipe, and the connection end Since the outer diameter of the portion and the connecting protrusion can be made smaller than the outer diameter of the connecting pipe, the mounting space and weight of the torque rod can be further reduced. As a result, it is possible to reduce the weight and space of the torque rod while securing the predetermined strength and rigidity (bending rigidity and torsional rigidity) of the torque rod. By changing the material of the torque rod from steel to aluminum or aluminum alloy, the loss factor (damping rate) of the material is improved, and as a result, transmission of unsprung vibration of the vehicle to the vehicle body (especially cab) is reduced. can do.
【００１９】またパイプ本体の外径をＤ1とし、接続端
部の外径をＤ2とし、接続用突出部の外径をＤ3とすると
き、０．５≦（Ｄ2／Ｄ1）≦０．９５、かつ０．５≦
（Ｄ3／Ｄ1）≦０．９５の関係を満たすようにトルクロ
ッドを形成すれば、トルクロッドを形成するアルミニウ
ム又はアルミニウム合金の組成及び熱処理により、その
強度及び剛性等が変化しても、トルクロッドの各部の強
度及び剛性（曲げ剛性及び捩り剛性）を確保することが
できる。更に連結パイプとエンド部材とをフリクション
溶接法，ＭＩＧ溶接法又はＴＩＧ溶接法により接合すれ
ば、接合面の不純物被膜が粘性金属とともに外部に押出
されて強力な固相接合が可能となるか、或いは溶接時に
スラグが発生せずかつアークがアルミニウム又はアルミ
ニウム合金の表面の酸化被膜を自動的に除去することに
より良好な接合が可能となる。[0019] When the outer diameter of the pipe body and D 1, the outer diameter of the connection end portion and D 2, the outer diameter of the connecting protrusion and D 3, 0.5 ≦ (D 2 / D 1) ≦ 0.95 and 0.5 ≦
If the torque rod is formed so as to satisfy the relationship of (D 3 / D 1 ) ≦ 0.95, even if the strength and rigidity of the aluminum or aluminum alloy forming the torque rod change due to the composition and heat treatment, The strength and rigidity (bending rigidity and torsional rigidity) of each part of the torque rod can be ensured. Furthermore, if the connecting pipe and the end member are joined by a friction welding method, a MIG welding method or a TIG welding method, the impurity film on the joining surface is extruded to the outside together with the viscous metal, so that a strong solid-phase joining is possible, or Good joining is possible because no slag is generated during welding and the arc automatically removes the oxide film on the surface of the aluminum or aluminum alloy.
【図１】本発明実施形態のトルクロッドの要部破断側面
図。FIG. 1 is a cutaway side view of a main part of a torque rod according to an embodiment of the present invention.
【図２】従来例を示す図１に対応する側面図。FIG. 2 is a side view corresponding to FIG. 1 showing a conventional example.
１１ トルクロッド １２ 連結パイプ １２ａ パイプ本体 １２ｂ 接続端部 １２ｃ テーパ部 １３ エンド部材 １３ａ 環状部 １３ｂ 接続用突出部 DESCRIPTION OF SYMBOLS 11 Torque rod 12 Connecting pipe 12a Pipe main body 12b Connection end part 12c Taper part 13 End member 13a Annular part 13b Projection part for connection
───────────────────────────────────────────────────── フロントページの続き (72)発明者 坂本 栄 東京都品川区東品川二丁目２番20号 日本 軽金属株式会社内 (72)発明者 望月 浩行 東京都品川区東品川二丁目２番20号 日本 軽金属株式会社内 Ｆターム(参考） 3D001 AA17 BA06 DA04 DA10 4E081 YC01 YC10 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sakamoto Sakamoto 2-2-2, Higashi-Shinagawa, Shinagawa-ku, Tokyo Inside Japan Light Metal Co., Ltd. (72) Inventor Hiroyuki Mochizuki 2-2-2, Higashi-Shinagawa, Shinagawa-ku, Tokyo Japan Light Metal Co., Ltd. F-term (reference) 3D001 AA17 BA06 DA04 DA10 4E081 YC01 YC10
Claims (3)
り形成された連結パイプ(12)と、アルミニウム又はアル
ミニウム合金により形成され前記連結パイプ(12)の両端
にそれぞれ接合されかつ環状部(13a,13a)及び接続用突
出部(13b,13b)からなる一対のエンド部材(13,13)とを備
えたトルクロッドにおいて、 前記連結パイプ(12)がその中央に設けられたパイプ本体
(12a)と、その両端に配設され外径が前記パイプ本体(12
a)の外径より小さく形成された一対の接続端部(12b,12
b)と、前記パイプ本体(12a)の両端と前記一対の接続端
部(12b,12b)とをそれぞれ連結し前記パイプ本体(12a)の
両端から前記一対の接続端部(12b,12b)に向うに従って
次第に細くなるようにそれぞれ形成された一対のテーパ
部(12c,12c)とを有し、 前記接続用突出部(13b)の外径が前記接続端部(12b)の外
径と略同一に形成されたことを特徴とするトルクロッ
ド。1. A connecting pipe (12) formed of aluminum or an aluminum alloy, and an annular portion (13a, 13a) connected to both ends of the connecting pipe (12) formed of aluminum or an aluminum alloy and connected to both ends, respectively. A torque rod comprising a pair of end members (13, 13) each comprising a protruding portion (13b, 13b), wherein the connecting pipe (12) is provided at the center thereof;
(12a) and the outer diameter of the pipe body (12
a) a pair of connecting ends (12b, 12
b), the two ends of the pipe body (12a) and the pair of connection ends (12b, 12b) are respectively connected to the pair of connection ends (12b, 12b) from both ends of the pipe body (12a). And a pair of tapered portions (12c, 12c) formed so as to become gradually thinner as they face, and an outer diameter of the connection protruding portion (13b) is substantially the same as an outer diameter of the connection end portion (12b). A torque rod characterized by being formed in.
端部(12b)の外径をＤ2とし、接続用突出部(13b)の外径
をＤ3とするとき、０．５≦（Ｄ2／Ｄ1）≦０．９５、
かつ０．５≦（Ｄ3／Ｄ1）≦０．９５の関係を満たす請
求項１記載のトルクロッド。Wherein the outer diameter of the pipe body (12a) and D 1, the connection end portion the outer diameter of (12b) and D 2, connection protruding portion the outer diameter of (13b) when the D 3, 0 0.5 ≦ (D 2 / D 1 ) ≦ 0.95,
2. The torque rod according to claim 1, wherein a relationship of 0.5 ≦ (D 3 / D 1 ) ≦ 0.95 is satisfied.
リクション溶接法，ＭＩＧ溶接法又はＴＩＧ溶接法によ
り接合された請求項１又は２記載のトルクロッド。3. The torque rod according to claim 1, wherein the connecting pipe and the end member are joined by a friction welding method, a MIG welding method, or a TIG welding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07899499A JP4020529B2 (en) | 1999-03-24 | 1999-03-24 | Torque rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07899499A JP4020529B2 (en) | 1999-03-24 | 1999-03-24 | Torque rod |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000272313A true JP2000272313A (en) | 2000-10-03 |
| JP4020529B2 JP4020529B2 (en) | 2007-12-12 |
Family
ID=13677462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07899499A Expired - Fee Related JP4020529B2 (en) | 1999-03-24 | 1999-03-24 | Torque rod |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4020529B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10324981A1 (en) * | 2003-06-03 | 2005-02-03 | Dr.Ing.H.C. F. Porsche Ag | Rod, especially control rod for wheel location for motor vehicle, has joint heads inserted into ends of pipe element with connecting journals; joint heads are forged parts |
| WO2005033529A1 (en) * | 2003-10-03 | 2005-04-14 | Bridgest0Ne Corporation | Torque rod structure |
| CN100381298C (en) * | 2004-03-19 | 2008-04-16 | 东海橡胶工业株式会社 | Torque rod |
| JP2010076473A (en) * | 2008-09-24 | 2010-04-08 | Toyota Motor Corp | I-shaped suspension arm for vehicle |
| JP2013032158A (en) * | 2012-10-09 | 2013-02-14 | Toyota Motor Corp | I-shaped suspension arm for vehicle |
-
1999
- 1999-03-24 JP JP07899499A patent/JP4020529B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10324981A1 (en) * | 2003-06-03 | 2005-02-03 | Dr.Ing.H.C. F. Porsche Ag | Rod, especially control rod for wheel location for motor vehicle, has joint heads inserted into ends of pipe element with connecting journals; joint heads are forged parts |
| DE10324981B4 (en) * | 2003-06-03 | 2005-10-06 | Dr.Ing.H.C. F. Porsche Ag | Linkage, in particular handlebar for a wheel steering a Kraffahrzeugs |
| WO2005033529A1 (en) * | 2003-10-03 | 2005-04-14 | Bridgest0Ne Corporation | Torque rod structure |
| CN100381298C (en) * | 2004-03-19 | 2008-04-16 | 东海橡胶工业株式会社 | Torque rod |
| JP2010076473A (en) * | 2008-09-24 | 2010-04-08 | Toyota Motor Corp | I-shaped suspension arm for vehicle |
| JP2013032158A (en) * | 2012-10-09 | 2013-02-14 | Toyota Motor Corp | I-shaped suspension arm for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4020529B2 (en) | 2007-12-12 |
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