JP3350600B2 - Automotive subframe structure - Google Patents
Automotive subframe structureInfo
- Publication number
- JP3350600B2 JP3350600B2 JP25152394A JP25152394A JP3350600B2 JP 3350600 B2 JP3350600 B2 JP 3350600B2 JP 25152394 A JP25152394 A JP 25152394A JP 25152394 A JP25152394 A JP 25152394A JP 3350600 B2 JP3350600 B2 JP 3350600B2
- Authority
- JP
- Japan
- Prior art keywords
- vertical member
- bending
- rear end
- vehicle body
- bead
- 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.)
- Expired - Fee Related
Links
Landscapes
- Body Structure For Vehicles (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車のサブフレーム
構造に関し、特に、車体の前後方向に延在する縦部材を
有する自動車のサブフレーム構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subframe structure of a motor vehicle, and more particularly, to a subframe structure of a motor vehicle having a vertical member extending in a front-rear direction of a vehicle body.
【０００２】[0002]
【従来の技術】サスペンションを支承するサブフレーム
を用いた自動車があり、サブフレームを自動車の前部に
配設した場合には、そのサブフレームにエンジン及びサ
スペンションを取り付けているものがある。そのサブフ
レームの構造に於いて、車体の左右にて前後方向に延在
する縦部材と、それら両縦部材の前端部同士及び後端部
同士をそれぞれ連結する横部材とにより井桁状に形成し
たものがある。2. Description of the Related Art Some automobiles use a sub-frame for supporting a suspension. When the sub-frame is disposed at the front of the automobile, an engine and a suspension are mounted on the sub-frame. In the structure of the sub-frame, a vertical member extending in the front-rear direction on the left and right sides of the vehicle body and a horizontal member connecting the front end portions and the rear end portions of the both vertical members are formed in a cross-girder shape. There is something.
【０００３】上記したようなサブフレームを用いたもの
にあっては、例えば実公昭６１−３９６５１号公報に開
示されているように、衝突時にボディの変形と共にサブ
フレームの縦部材も変形させて衝撃力を吸収するように
している。縦部材を衝突時の座屈荷重により変形させる
ためには、上記公報に開示されているように縦部材に曲
げのきっかけとなる箇所（ビード）を設けたものがあ
る。また、縦部材の側面を模式的に示す図３に示される
ように、縦部材１１の車体側に結合される前後の両端部
１１ａ・１１ｂに対して中間部１１ｃを下方に位置させ
るように縦部材１１を曲折して形成し、主断面図心軸を
下方にオフセットさせて、衝突時の座屈荷重により下方
に屈曲し得るようにしたものがある。In the case of using the above-mentioned sub-frame, as disclosed in, for example, Japanese Utility Model Publication No. 61-39651, the vertical member of the sub-frame is deformed together with the deformation of the body at the time of collision. I try to absorb the power. In order to deform the vertical member due to a buckling load at the time of a collision, there is a vertical member provided with a portion (bead) that triggers bending as disclosed in the above-mentioned publication. Also, as shown in FIG. 3 schematically showing the side surface of the vertical member, the vertical portion 11 is positioned such that the intermediate portion 11c is positioned below the front and rear end portions 11a and 11b connected to the vehicle body side. In some cases, the member 11 is formed by bending, and the center axis of the main sectional view is offset downward so that the member 11 can be bent downward by a buckling load at the time of collision.
【０００４】また、サブフレームの縦部材を、上記図３
に示したように前後の両端部の２点で支持するだけでな
く、中間部に中間連結ブラケットを立設し、その中間連
結ブラケットを介して３点で支持するようにしたものが
ある。このようにすることにより、サブフレームの剛性
を高めたり、車体側への取付自由度を向上し得る。しか
しながら、縦部材の中間点を中間連結ブラケットを介し
て車体側に結合されていることから、座屈変形時に下方
に屈曲し難くなると言う問題が生じる。Further, the vertical member of the sub-frame is
As shown in FIG. 5, not only two support points at the front and rear ends but also an intermediate connection bracket is erected at an intermediate part and supported at three points via the intermediate connection bracket. By doing so, the rigidity of the subframe can be increased, and the degree of freedom of attachment to the vehicle body can be improved. However, since the intermediate point of the vertical member is connected to the vehicle body via the intermediate connection bracket, there is a problem that it is difficult to bend downward during buckling deformation.
【０００５】このような従来技術の問題点に鑑み、本発
明の主な目的は、衝突時の座屈による屈曲を円滑に行わ
せ得る自動車のサブフレーム構造を提供することにあ
る。SUMMARY OF THE INVENTION In view of the above problems of the prior art, a main object of the present invention is to provide a subframe structure of an automobile capable of smoothly bending due to buckling at the time of a collision.
【０００６】[0006]
【課題を解決するための手段】このような目的は、本発
明によれば、車体の前後方向に延在する縦部材を有する
と共にエンジンを支持する自動車のサブフレーム構造で
あって、前記縦部材が、中間部を前後端部よりも前記車
体の下方に位置させるように曲折されて形成され、かつ
前記中間部に立設された中間連結ブラケットを有し、前
記前後端部と前記中間連結ブラケットとの各点で前記車
体に結合されていると共に、前記縦部材の前記中間連結
ブラケットと前記前端部との間と、前記中間連結ブラケ
ットと前記後端部との間とに、それぞれ前記縦部材の軸
線方向に異なる複数の位置に当該軸線方向に略直交する
向きの複数の曲折用ビードが形成され、かつ前記複数の
曲折用ビードが、前記中間連結ブラケットを挟んで前記
縦部材の上面と下面とに交互に設けられていることを特
徴とする自動車のサブフレーム構造を提供することによ
り達成される。According to the present invention, there is provided a vertical member extending in a front-rear direction of a vehicle body.
The vertical member is bent and formed so that an intermediate portion is located below the vehicle body from front and rear end portions, and is vertically erected on the intermediate portion. It had an intermediate connection bracket, with being coupled to the vehicle body at each point of the said front and rear end portions intermediate connection bracket, and between the intermediate connection bracket to the front end of the longitudinal member, the intermediate Consolidated braquet
Between the slot and the rear end portion, a plurality of bending beads in a direction substantially orthogonal to the axial direction are formed at a plurality of positions different from each other in the axial direction of the vertical member, and the plurality of bending beads are formed .
The bead for bending is sandwiched by the intermediate connection bracket.
This is achieved by providing a subframe structure of a motor vehicle characterized by being provided alternately on the upper surface and the lower surface of a vertical member .
【０００７】[0007]
【作用】このようにすれば、縦部材の前端部と中間連結
ブラケットとの間の部分及び中間連結ブラケットと後端
部との間の部分が、衝突による座屈荷重が発生した際に
は、軸線方向の異なる位置に設けられた複数の曲折用ビ
ードをきっかけとして、各曲折用ビードを屈曲ポイント
としてそれぞれ曲がり得ることから、縦部材を前後端部
及び中間部で結合するようにした構造のものに於いても
衝突時の縦部材の屈曲変形を円滑に行わせることができ
る。In this manner, the portion between the front end of the vertical member and the intermediate connecting bracket, and the intermediate connecting bracket and the rear end
Portion between the parts is, when the buckling load occurs due to collision, as a trigger multiple bent bead provided axially different positions, to obtain bending each respective bent bead as bending points From the front and rear ends
Also, in a structure in which the vertical members are connected at the intermediate portion, the bending deformation of the vertical member at the time of collision can be smoothly performed.
【０００８】[0008]
【実施例】以下、本発明の好適実施例を添付の図面につ
いて詳しく説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a preferred embodiment of the present invention.
【０００９】図１は、本発明が適用された自動車の前部
のフレームを示す分解組立斜視図であり、図示されない
ボンネット内には、前後方向に延在する左右のフロント
サイドフレーム２・３が設けられている。フロントサイ
ドフレーム２・３は、図示されない車室のフロアパネル
側から斜め上方に立ち上がり、その後ボンネットの前部
に至るまで略水平に延在している。FIG. 1 is an exploded perspective view showing a front frame of an automobile to which the present invention is applied. In a hood (not shown), left and right front side frames 2 and 3 extending in the front-rear direction are provided. Is provided. The front side frames 2 and 3 rise obliquely upward from the floor panel side of the vehicle compartment (not shown), and thereafter extend substantially horizontally to the front of the hood.
【００１０】フロントサイドフレーム２・３の下側には
サブフレーム４が取り付けられており、そのサブフレー
ム４により前輪駆動用のエンジン５が支持されている。
本サブフレーム４は、図に示されるように井桁状に形成
されており、車体の前後方向に延在する左右の縦部材６
と、両縦部材６の各前端部同士及び後端部同士をそれぞ
れ連結する前側横部材７・後側横部材８とにより構成さ
れている。A sub-frame 4 is attached to the lower side of the front side frames 2 and 3, and the sub-frame 4 supports an engine 5 for driving front wheels.
The sub-frame 4 is formed in a cross-girder shape as shown in the figure, and includes left and right vertical members 6 extending in the front-rear direction of the vehicle body.
And a front horizontal member 7 and a rear horizontal member 8 that connect the front end portions and the rear end portions of the vertical members 6 to each other.
【００１１】縦部材６は、前後の各端部６ａ・６ｂと中
間部６ｃに立設された中間連結ブラケット９との３点で
フロントサイドフレーム２に図示されない締結部材にて
結合される。縦部材６は、その側面を模式的に示す図２
（ａ）に示されるように、その中間部６ｃを前後端部６
ａ・６ｂよりも車体の下方に位置させるように、前後端
部６ａ・６ｂの近傍を曲折されて形成されている。The vertical member 6 is connected to the front side frame 2 by a fastening member (not shown) at three points, namely, front and rear ends 6a and 6b and an intermediate connecting bracket 9 erected on the intermediate portion 6c. The vertical member 6 is shown in FIG.
As shown in (a), the intermediate portion 6c is connected to the front and rear end portions 6c.
The vicinity of the front and rear end portions 6a and 6b is bent so as to be positioned below the vehicle body with respect to the vehicle body a and 6b.
【００１２】縦部材６には、図２（ａ）に併せて示され
るように、中間連結ブラケット９と前端部６ａとの間に
かつ縦部材６の軸線方向に対して異なる位置となる２箇
所に、それぞれ曲折用ビード１０ａ・１０ｂが設けられ
ている。これら曲折用ビード１０ａ・１０ｂは、縦部材
６の軸線方向に略直交する向きの溝状に、縦部材６をプ
レス加工する際に同時に加工される。縦部材６の上面の
前端部６ａ側に一方の曲折用ビード１０ａが設けられ、
縦部材６の下面の中間連結ブラケット９側に他方の曲折
用ビード１０ｂが設けられている。As shown in FIG. 2A, the vertical member 6 has two positions between the intermediate connecting bracket 9 and the front end 6a and at different positions in the axial direction of the vertical member 6. Are provided with bending beads 10a and 10b, respectively. These bending beads 10a and 10b are simultaneously formed into a groove shape that is substantially perpendicular to the axial direction of the vertical member 6 when the vertical member 6 is pressed. One bending bead 10a is provided on the front end 6a side of the upper surface of the vertical member 6,
The other bending bead 10b is provided on the lower surface of the vertical member 6 on the side of the intermediate connection bracket 9.
【００１３】また、縦部材６の中間連結ブラケット９と
後端部６ｂとの間にも、上記と同様に曲折用ビード１０
ｃ・１０ｄが設けられている。そして、縦部材６の上面
の中間連結ブラケット９側に一方の曲折用ビード１０ｃ
が設けられており、縦部材６の下面の後端部６ｂ側に他
方の曲折用ビード１０ｄが設けられている。Also, between the intermediate connecting bracket 9 of the vertical member 6 and the rear end portion 6b, the bending bead 10 is provided in the same manner as described above.
c · 10d are provided. One bead 10c for bending is provided on the upper surface of the vertical member 6 on the side of the intermediate connection bracket 9.
The other bending bead 10d is provided on the rear end 6b side of the lower surface of the vertical member 6.
【００１４】このようにして形成された縦部材６にあっ
ては、衝突時に座屈荷重が加わると、各曲折用ビード１
０ａ〜１０ｄの所をきっかけとして、図２（ｂ）の実線
に示されるような変形が起こり得る。中間連結ブラケッ
ト９よりも前側に設けた各曲折用ビード１０ａ・１０ｂ
は、外部の衝撃力がエンジン５に直接的に作用する前に
縦部材６に変形を起こさせるためのものであり、中間連
結ブラケット９よりも後側に設けた各曲折用ビード１０
ｃ・１０ｄは、外部の衝撃力がエンジン５に作用してエ
ンジン５が後方に変位しようとする際に縦部材６に変形
を起こさせるためのものであり、それぞれの変形時に衝
撃力を好適に吸収し得る。In the vertical member 6 formed as described above, when a buckling load is applied at the time of a collision, each bending bead 1 is bent.
At the points of 0a to 10d, the deformation as shown by the solid line in FIG. Each bead 10a, 10b provided on the front side of the intermediate connecting bracket 9
Are used to cause the vertical member 6 to deform before an external impact force acts directly on the engine 5. Each bending bead 10 provided on the rear side of the intermediate connecting bracket 9
c · 10d is for causing the vertical member 6 to be deformed when an external impact force acts on the engine 5 and the engine 5 is displaced rearward. Can absorb.
【００１５】各曲折用ビード１０ａ〜１０ｄを本実施例
のように設けることにより、縦部材６の下方への屈曲を
円滑に行わせることができる。なお、より強い衝撃力が
加わった場合には図２（ｂ）の想像線に示されるよう
に、より大きく屈曲し得る。By providing the bending beads 10a to 10d as in this embodiment, the downward bending of the vertical member 6 can be performed smoothly. In addition, when a stronger impact force is applied, as shown by the imaginary line in FIG.
【００１６】[0016]
【発明の効果】このように本発明によれば、衝突時の座
屈による屈曲ポイントとなる曲折用ビードを、縦部材の
中間連結ブラケットと前端部との間及び中間連結ブラケ
ットと後端部との間にてそれぞれ軸線方向に異なる複数
の位置に設けたことから、縦部材を前後端部及び中間部
で結合するようにした構造のものに於いても座屈による
屈曲を円滑に行わせることができ、ボディの座屈変形に
影響を与えることなく、衝突時の衝撃力の吸収を好適に
行うことができる。Effect of the Invention According to the present invention as described above, and between the intermediate connection of a bent bead as the bend point by buckling at the time of collision, an intermediate connection bracket and the front end of the longitudinal member Burake
Since provided in a plurality of different positions in each axial direction in between the Tsu bets and the rear end portion, by buckling even in those of the structural vertical member so as to bind before the rear end portion and the intermediate portion The bending can be performed smoothly, and the impact force at the time of collision can be appropriately absorbed without affecting the buckling deformation of the body.
【図１】本発明が適用された自動車の前部のフレームを
示す分解組立斜視図。FIG. 1 is an exploded perspective view showing a front frame of an automobile to which the present invention is applied.
【図２】（ａ）はサブフレームの縦部材の側面を模式的
に示す図であり、（ｂ）は縦部材の屈曲状態を示す図。2A is a diagram schematically illustrating a side surface of a vertical member of a sub-frame, and FIG. 2B is a diagram illustrating a bent state of the vertical member.
【図３】従来の縦部材の１実施例を示す模式的側面図。FIG. 3 is a schematic side view showing one embodiment of a conventional vertical member.
２・３ フロントサイドフレーム ４ サブフレーム ５ エンジン ６ 縦部材 ６ａ 前端部 ６ｂ 後端部 ６ｃ 中間部 ７ 前側横部材 ８ 後側横部材 ９ 中間連結ブラケット １０ａ・１０ｂ・１０ｃ・１０ｄ 曲折用ビード １１ 縦部材 １１ａ 前端部 １１ｂ 後端部 １１ｃ 中間部 2.3 Front side frame 4 Subframe 5 Engine 6 Vertical member 6a Front end 6b Rear end 6c Intermediate part 7 Front side member 8 Rear side member 9 Intermediate connecting bracket 10a, 10b, 10c, 10d Bead for bending 11 Vertical member 11a Front end 11b Rear end 11c Middle part
フロントページの続き (56)参考文献 特開 平４−146874（ＪＰ，Ａ) 特開 昭64−12916（ＪＰ，Ａ) 特開 平５−8755（ＪＰ，Ａ) 特開 平５−105110（ＪＰ，Ａ) 特開 平３−86687（ＪＰ，Ａ) 特開 平４−321475（ＪＰ，Ａ) 特開 平４−353080（ＪＰ，Ａ) 特開 平５−310146（ＪＰ，Ａ) 特開 平３−96969（ＪＰ，Ａ) 特開 平３−25082（ＪＰ，Ａ) 実開 昭58−35471（ＪＰ，Ｕ) 実開 平４−5184（ＪＰ，Ｕ) 実開 平４−71082（ＪＰ，Ｕ) 実開 平４−69287（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B62D 21/15 B62D 21/00 B62D 25/20 Continuation of front page (56) References JP-A-4-146874 (JP, A) JP-A-64-12916 (JP, A) JP-A-5-8755 (JP, A) JP-A-5-105110 (JP, A) JP-A-3-86687 (JP, A) JP-A-4-321475 (JP, A) JP-A-4-353080 (JP, A) JP-A-5-310146 (JP, A) 3-96969 (JP, A) JP-A-3-25082 (JP, A) JP-A-58-35471 (JP, U) JP-A-4-5184 (JP, U) JP-A-4-71082 (JP, A) U) Japanese Utility Model Hei 4-69287 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B62D 21/15 B62D 21/00 B62D 25/20
Claims (1)
すると共にエンジンを支持する自動車のサブフレーム構
造であって、 前記縦部材が、中間部を前後端部よりも前記車体の下方
に位置させるように曲折されて形成され、かつ前記中間
部に立設された中間連結ブラケットを有し、前記前後端
部と前記中間連結ブラケットとの各点で前記車体に結合
されていると共に、前記縦部材の 前記中間連結ブラケットと前記前端部との
間と、前記中間連結ブラケットと前記後端部との間と
に、それぞれ前記縦部材の軸線方向に異なる複数の位置
に当該軸線方向に略直交する向きの複数の曲折用ビード
が形成され、かつ前記複数の曲折用ビードが、前記中間
連結ブラケットを挟んで前記縦部材の上面と下面とに交
互に設けられていることを特徴とする自動車のサブフレ
ーム構造。1. A subframe structure of an automobile having a vertical member extending in a front-rear direction of a vehicle body and supporting an engine , wherein the vertical member has an intermediate portion positioned below the front and rear end portions of the vehicle body. It is formed by bending so as to, and the an intermediate portion intermediate connecting bracket erected on, along with being coupled to the vehicle body at each point of the said front and rear end portions intermediate connecting bracket, the longitudinal Between the intermediate connection bracket and the front end of the member, and between the intermediate connection bracket and the rear end
A plurality of bent bead direction substantially perpendicular to the axial direction into a plurality of different positions in the axial direction of each of said longitudinal member
Is formed , and the plurality of bead for bending is formed in the intermediate
The upper and lower surfaces of the vertical member intersect with the connecting bracket
A subframe structure for a motor vehicle, wherein the subframe structure is provided mutually .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25152394A JP3350600B2 (en) | 1994-09-20 | 1994-09-20 | Automotive subframe structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25152394A JP3350600B2 (en) | 1994-09-20 | 1994-09-20 | Automotive subframe structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0885473A JPH0885473A (en) | 1996-04-02 |
| JP3350600B2 true JP3350600B2 (en) | 2002-11-25 |
Family
ID=17224083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25152394A Expired - Fee Related JP3350600B2 (en) | 1994-09-20 | 1994-09-20 | Automotive subframe structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3350600B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161196A1 (en) * | 2014-04-17 | 2015-10-22 | Tesla Motors, Inc. | Subframe configured to detach upon impact |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4558137B2 (en) * | 2000-04-28 | 2010-10-06 | 富士重工業株式会社 | Vehicle front structure |
| JP4788045B2 (en) * | 2001-02-19 | 2011-10-05 | マツダ株式会社 | Front body structure of automobile |
| JP3900048B2 (en) * | 2001-11-19 | 2007-04-04 | 日産自動車株式会社 | Body front structure |
| US7213873B2 (en) | 2004-03-25 | 2007-05-08 | Mazda Motor Corporation | Vehicle front-part structure |
| JP4595365B2 (en) * | 2004-03-25 | 2010-12-08 | マツダ株式会社 | Car front subframe |
| JP4994635B2 (en) * | 2005-10-25 | 2012-08-08 | 富士重工業株式会社 | Vehicle front suspension |
| JP2008056191A (en) * | 2006-09-04 | 2008-03-13 | Fuji Heavy Ind Ltd | Front structure of vehicle body |
| JP5471559B2 (en) * | 2010-02-15 | 2014-04-16 | マツダ株式会社 | Automobile undercarriage |
| JP5440318B2 (en) * | 2010-03-26 | 2014-03-12 | トヨタ自動車株式会社 | Body front structure |
| JP5573413B2 (en) * | 2010-06-28 | 2014-08-20 | マツダ株式会社 | Lower body structure of the vehicle |
| JP5630615B2 (en) * | 2011-03-17 | 2014-11-26 | 三菱自動車工業株式会社 | Vehicle body structure |
| CN103738401A (en) * | 2013-12-26 | 2014-04-23 | 柳州正菱集团有限公司 | Design method of auxiliary frame supporting rack |
| JP2016060311A (en) * | 2014-09-17 | 2016-04-25 | 本田技研工業株式会社 | Sub frame structure |
| JP6511885B2 (en) * | 2015-03-17 | 2019-05-15 | 三菱自動車工業株式会社 | Automotive front structure |
| JP6421723B2 (en) | 2015-08-18 | 2018-11-14 | トヨタ自動車株式会社 | Vehicle front structure |
| DE102015224894A1 (en) * | 2015-12-10 | 2017-06-14 | Volkswagen Aktiengesellschaft | Hinterachshilfsrahmen and motor vehicle with such a Hinterachshilfsrahmen |
| CN113015671B (en) * | 2018-11-19 | 2022-11-22 | 本田技研工业株式会社 | Vehicle body structure |
| JP7267810B2 (en) | 2019-03-29 | 2023-05-02 | 株式会社エフテック | vehicle subframe |
-
1994
- 1994-09-20 JP JP25152394A patent/JP3350600B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015161196A1 (en) * | 2014-04-17 | 2015-10-22 | Tesla Motors, Inc. | Subframe configured to detach upon impact |
| US9352785B2 (en) | 2014-04-17 | 2016-05-31 | Tesla Motors, Inc. | Subframe configured to detach upon impact |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0885473A (en) | 1996-04-02 |
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