JPH0634207Y2 - Body dash floor structure - Google Patents

Body dash floor structure

Info

Publication number
JPH0634207Y2
JPH0634207Y2 JP1988033630U JP3363088U JPH0634207Y2 JP H0634207 Y2 JPH0634207 Y2 JP H0634207Y2 JP 1988033630 U JP1988033630 U JP 1988033630U JP 3363088 U JP3363088 U JP 3363088U JP H0634207 Y2 JPH0634207 Y2 JP H0634207Y2
Authority
JP
Japan
Prior art keywords
dash
width direction
rack
vehicle width
bracket
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 - Lifetime
Application number
JP1988033630U
Other languages
Japanese (ja)
Other versions
JPH01145667U (en
Inventor
英之 舘野
洋 河合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP1988033630U priority Critical patent/JPH0634207Y2/en
Publication of JPH01145667U publication Critical patent/JPH01145667U/ja
Application granted granted Critical
Publication of JPH0634207Y2 publication Critical patent/JPH0634207Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Steering Controls (AREA)
  • Body Structure For Vehicles (AREA)
  • Vibration Dampers (AREA)

Description

【考案の詳細な説明】 [考案の目的] (産業上の利用分野) 本考案は自動車車体のダッシュロア構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Use) The present invention relates to a dash lower structure of an automobile body.

(従来の技術) 第3図は従来のダッシュロア構造を略示したものである
(特開昭59-135268参照)。図面において、キャビンC
とエンジンルームEとを区画するダッシュボード1の下
部を斜め後方へ折曲してダッシュロア2を形成し、この
ダッシュロアの前側にダッシュクロスメンバ3を接合し
てある。ダッシュクロスメンバ3は水平部材3aと垂直部
材3bとによって断面がL字形に形成されて車巾方向に延
び、また水平部材3aには車巾方向にレインフォース4を
接合してある。そしてかかるダッシュクロスメンバ3を
ダッシュロア2と共に左右のフロントサイドメンバ6に
接合して車巾方向、前後方向の強度メンバとしている。
すなわち該メンバ3はダッシュロア2を補強するととも
に、上記フロントサイドメンバ6に取付けられるサスペ
ンションメンバ7、例えばストラット懸架機構のトラン
スバースリンクの取付部付近に接合されて該部の剛性を
高め、レインフォース4はこの剛性値と、同時に車巾方
向面内での振動特性の決定にあづかっている。
(Prior Art) FIG. 3 schematically shows a conventional dash lower structure (see JP-A-59-135268). In the drawing, cabin C
The lower portion of the dashboard 1 that divides the engine room E from the engine compartment E is bent obliquely rearward to form a dash lower 2, and a dash cross member 3 is joined to the front side of the dash lower. The dash cross member 3 has an L-shaped cross section formed by a horizontal member 3a and a vertical member 3b and extends in the vehicle width direction, and a reinforcement 4 is joined to the horizontal member 3a in the vehicle width direction. The dash cross member 3 is joined to the left and right front side members 6 together with the dash lower 2 to form a strength member in the vehicle width direction and the front-rear direction.
That is, the member 3 reinforces the dash lower 2 and is joined to the suspension member 7 attached to the front side member 6, for example, in the vicinity of the attachment portion of the transverse link of the strut suspension mechanism to enhance the rigidity of the portion and to enhance the reinforcement force. 4 is based on this rigidity value and at the same time, the determination of the vibration characteristic in the vehicle width direction plane.

一方ステアリング機構20は、ステアリングホイル21、通
常チルト装置を備えたステアリング主軸22、自在接手を
介して折曲できる中間軸23、ステアリングラック・ピニ
オン装置24等を一連に備え、該ラック・ピニオン装置24
のラック25はダッシュクロスメンバ3の垂直部材3bに取
付けたラックマウントブラケット9に支持されている。
On the other hand, the steering mechanism 20 includes a steering wheel 21, a steering main shaft 22 normally equipped with a tilting device, an intermediate shaft 23 that can be bent through a universal joint, a steering rack and pinion device 24, and the like in series, and the rack and pinion device 24
The rack 25 is supported by a rack mount bracket 9 attached to the vertical member 3b of the dash cross member 3.

したがって上記構造によれば、当該自動車がもし前面衝
突をした場合、フロントサイドメンバ6その他のフロン
ト構成部材がつぶされて衝突エネルギを吸収するも、ダ
ッシュロアはダッシュクロスメンバ3により補強されて
いてその変形が制約されるので、該クロスメンバ3とス
テアリング機構20との相対位置がほぼ現状のまま保持さ
れる結果、ステアリングホイル21やステアリング主軸22
のキャビンC側への有害な突込みが防止される。
Therefore, according to the above structure, when the vehicle has a frontal collision, the front side member 6 and other front constituent members are crushed to absorb collision energy, but the dash lower is reinforced by the dash cross member 3 and Since the deformation is restricted, the relative position between the cross member 3 and the steering mechanism 20 is maintained almost as it is. As a result, the steering wheel 21 and the steering main shaft 22 are retained.
The harmful plunge of the vehicle into the cabin C side is prevented.

(考案が解決しようとする課題) ところでこのような従来のダッシュロア構造にあって
は、衝突に際して乗員に過度な衝撃を与えないようにす
るため、ダッシュロアを前述したように補強してその変
形を制約するようにしていたので該部でのエネルギ吸収
能力が低く、そのため衝突力がダッシュロア部まで伝達
されたとき第2図の破線で示したカーブXのように減速
度Gが山形に立上ってしまい人体に直接衝突力が伝わ
り、人体に悪影響を及ぼす。
(Problems to be solved by the invention) By the way, in such a conventional dash lower structure, in order to prevent the occupant from being excessively impacted in the event of a collision, the dash lower is reinforced and deformed as described above. Since the energy absorption capacity at this portion is low, the deceleration G rises like a curve X as shown by the broken line X in FIG. 2 when the collision force is transmitted to the dash lower portion. The collision force is directly transmitted to the human body, which adversely affects the human body.

そこで本考案の技術的課題は、ステアリング主軸等の後
方ストロークを抑制すると共にダッシュロアにおいても
衝突エネルギを吸収させうるようにする点にある。
Therefore, the technical problem of the present invention is to suppress the rearward stroke of the steering main shaft or the like and to absorb the collision energy even in the dash lower.

[考案の構成] (課題を解決するための手段) 上記課題を解決するために本考案の手段は、キャビンと
エンジンルームとを区画するダッシュボードの下部を斜
め後方へ折曲してダッシュロアを形成し、この折曲部
に、水平部材と垂直部材からなるダッシュクロスメンバ
を取付けて略直角三角形の閉断面構造を形成すると共
に、前記ダッシュクロスメンバの垂直部材に該垂直部材
の前方に突出し車巾方向に延びる断面略台形状のラック
マウントブラケットを取付けて該ブラケットにステアリ
ング機構のラックを支持する一方、前記ダッシュクロス
メンバの水平部材及び前記ブラケットの下側部材のみに
車巾方向にほぼ全長に渡って連続するビードを設けてな
るものである。
[Means for Solving the Problems] (Means for Solving the Problems) In order to solve the above problems, the means for solving the problems is to bend the lower part of the dashboard partitioning the cabin and the engine room obliquely rearward to form the dash lower. A dash cross member composed of a horizontal member and a vertical member is attached to the bent portion to form a closed cross-section structure of a substantially right triangle, and a vehicle protruding forward from the vertical member is attached to the vertical member of the dash cross member. A rack mount bracket having a substantially trapezoidal cross-section extending in the width direction is mounted to support the rack of the steering mechanism on the bracket, while only the horizontal member of the dash cross member and the lower member of the bracket have a substantially entire length in the vehicle width direction. It is provided with continuous beads.

(作用) 上記手段によれば、前述のビードは従来のレインフォー
ス等と同様にしてこの方向の面内での強度を高め、一方
で前面衝突力のような車体前後方向の荷重に対しては該
ビードが比較的容易に狭縮変形をしうる。よってビード
の形状、寸法、条数等を適宜に決定することによりこれ
らのダッシュロア構造部材を強度メンバおよび衝突吸収
メンバとして双方の作用を営ませることができる。
(Operation) According to the above-mentioned means, the above-mentioned bead enhances the strength in the plane in this direction in the same manner as the conventional reinforcement, etc., while it resists the load in the vehicle longitudinal direction such as the frontal collision force. The bead can undergo narrowing deformation relatively easily. Therefore, by appropriately determining the shape, size, number of threads, etc. of the bead, these dash lower structural members can function as both a strength member and a collision absorbing member.

またこの手段によれば、ビードを当該ダッシュロア構造
部材の下側に形成してあるので、これが衝突力を受けて
狭縮すると該構造部材の上方部分が相対回動をしてここ
に支持されたステアリング機構を前方寄りに傾けるの
で、前述したステアリング主軸等の後方ストロークによ
る突込みが回避される。
Further, according to this means, since the bead is formed on the lower side of the dash lower structural member, when the bead is subjected to a collision force and contracted, the upper portion of the structural member is relatively rotated and is supported there. Further, since the steering mechanism is tilted toward the front, the above-mentioned thrust due to the rearward stroke of the steering main shaft or the like can be avoided.

(実施例) 第1図を参照して本考案の一実施例を説明する。尚この
実施例において、ダッシュボード1、ロアダッシュ2、
フロントサイドメンバ6、サスペンションメンバ7等か
らなる構成は前記従来のものと同じであるので重複する
説明は省略する。
(Embodiment) An embodiment of the present invention will be described with reference to FIG. In this embodiment, dashboard 1, lower dash 2,
The configuration including the front side member 6, the suspension member 7 and the like is the same as that of the above-mentioned conventional one, and thus the duplicate description will be omitted.

ダッシュクロスメンバ10を従来のものと同様に板材を用
いて下側部材となる水平部材10aと、これから立上る垂
直部材10bとで断面L字形に形成し、かつ、斜め後方へ
折曲したダッシュロア2とで略直角三角形の閉断面構造
を形成するほか、水平部材10aには車巾方向のほぼ全長
にわたって例えば3条のビード11を山形に屈曲成形して
ある。そしてかかるダッシュクロスメンバ10をダッシュ
ロア2の前側に接合するとともに両端部を左右のフロン
トサイドメンバ6に接合して車巾方向の強度メンバとし
ている。すなわち車巾方向のビード11が従来のレインフ
ォーレス4(第3図)に代ってダッシュクロスメンバ1
0、特にその水平部材10aにおける車巾方向面内での補強
と振動特性の改善等を行なうとともにサスペンションメ
ンバ7の取付部剛性を確保している。そして該クロスメ
ンバ10の垂直部材10bにはその前側にラックマウントブ
ラケット12を固定してある。該ブラケット12は板金によ
って横向きの台形に作られ、この台形の下側部材には車
巾方向にビード13を形成し、前側部材12aに前記ステア
リング機構20の前記ラック25を支持させてある。
As in the conventional dash cross member 10, a dash lower formed by using a plate member in the same manner as the conventional one, a horizontal member 10a serving as a lower member and a vertical member 10b rising from this to have an L-shaped cross section and bent obliquely rearward. In addition to forming a substantially right-angled triangle closed cross-section structure with 2, the horizontal member 10a has, for example, three bead 11 bent in a mountain shape over substantially the entire length in the vehicle width direction. The dash cross member 10 is joined to the front side of the dash lower 2 and both ends are joined to the left and right front side members 6 to form a strength member in the vehicle width direction. That is, the bead 11 in the vehicle width direction is replaced by the dash cross member 1 in place of the conventional rainless 4 (Fig. 3).
In particular, the horizontal member 10a is reinforced in the plane in the vehicle width direction and the vibration characteristics are improved, and the rigidity of the mounting portion of the suspension member 7 is secured. A rack mount bracket 12 is fixed to the front side of the vertical member 10b of the cross member 10. The bracket 12 is formed in a lateral trapezoidal shape by a sheet metal, and a bead 13 is formed in a vehicle width direction on a lower member of the trapezoid, and a front member 12a supports the rack 25 of the steering mechanism 20.

実施例は以上のように構成されている。したがって通常
時は補強されているが前面衝突に際してダッシュクロス
メンバ10には前方から衝突力が伝達されると、各ビード
11の山形が前後方向につぶれ即ち前後方向に狭縮変形を
なし、これに伴って垂直部材10bがその上縁接合部付近
を中心に矢印Aのごとく後方へ回動する。よって上記狭
縮変形により衝突エネルギが吸収されるので前記第2図
に実線のカーブYで示されたように減速度Gの大きな立
上りを防止することができる。そしてまた一方垂直部材
10bの上記回動に伴われてラック25も同傾向に変位する
ので、ステアリングホイル21が2点鎖線示の21′位置ま
で前進するごとく当該ステアリング機構20全体が前方へ
相対的に引きづられて移動する。これにより衝突の際に
おける前記突込みが回避され、更にはその後方ストロー
クが減少するので乗員の安全が一層確保される。
The embodiment is configured as described above. Therefore, it is normally reinforced, but when a collision force is transmitted from the front to the dash cross member 10 in the case of a frontal collision, each bead is
The mountain shape of 11 is crushed in the front-rear direction, that is, narrowed and deformed in the front-rear direction, and accordingly, the vertical member 10b pivots rearward around the upper edge joint portion as shown by an arrow A. Therefore, since the collision energy is absorbed by the narrowing deformation, a large rise of the deceleration G can be prevented as shown by the solid curve Y in FIG. And again one vertical member
Since the rack 25 is displaced in the same tendency as the 10b is rotated, the entire steering mechanism 20 is relatively pulled forward as the steering wheel 21 moves forward to the 21 'position indicated by the chain double-dashed line. Moving. This avoids the plunge in the event of a collision, and further reduces the rearward stroke, further ensuring the safety of the occupant.

更にまたラックマウントブラケット12の下側に形成した
ビード13は、前記ステアリングラック・ピニオン装置24
などに衝撃荷重が作用したとき、ダッシュクロスメンバ
のビード11と同様に狭縮変形して衝撃緩和作用とステア
リング機構の後方ストローク減少作用とを営む。
Furthermore, the bead 13 formed on the lower side of the rack mount bracket 12 is the steering rack and pinion device 24.
When an impact load is applied to, for example, the bead 11 of the dash cross member is narrowed and deformed to exert an impact absorbing action and a rear stroke reducing action of the steering mechanism.

[考案の効果] 以上説明したように本考案に係るダッシュロアは、ステ
アリング機構サスペンションを支持して常時は従来と同
様に車体の強度メンバを構成する一方、衝突などの事態
が発生すると変形して当該構造体においても衝突エネル
ギを吸収するので、前記フロントサイドメンバその他の
車体フロント構成体を面倒な軟構造としなくても乗員に
過度な衝撃を与えることなく、しかも上記変形に伴われ
てステアリング機構が前方へ引きづり込まれるので、ス
テアリングホイルや同主軸の後方ストロークによる突込
みが防止され、乗員の安全が向上する。
[Effects of the Invention] As described above, the dash lower according to the present invention supports the steering mechanism suspension and always constitutes the strength member of the vehicle body in the same manner as the conventional one, but is deformed when a situation such as a collision occurs. Since the collision energy is absorbed also in the structure, even if the front side members and other vehicle body front constituent members do not have a troublesome soft structure, an excessive impact is not given to the occupant, and the steering mechanism is accompanied by the deformation. Since the car is pulled forward, thrusting due to the rearward stroke of the steering wheel and the main shaft is prevented, and the safety of the occupant is improved.

【図面の簡単な説明】[Brief description of drawings]

第1図は本考案の一実施例を示す車体要部の側断面図、
第2図は衝撃時における減速度推移をあらわした線図、
第3図は従来のダッシュロア構造を例示した車体要部の
側面断面図である。 1……ダッシュボード 2……ダッシュロア 10……ダッシュクロスメンバ 11……ビード 12……ラックマウントブラケット 13……ビード 20……ステアリング機構 25……ラック
FIG. 1 is a side sectional view of a main part of a vehicle body showing an embodiment of the present invention,
Fig. 2 is a diagram showing the deceleration transition at the time of impact,
FIG. 3 is a side sectional view of a main part of a vehicle body illustrating a conventional dash lower structure. 1 …… Dashboard 2 …… Dash lower 10 …… Dash cross member 11 …… Bead 12 …… Rack mount bracket 13 …… Bead 20 …… Steering mechanism 25 …… Rack

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】キャビンとエンジンルームとを区画するダ
ュシュボードの下部を斜め後方へ折曲してダッシュロア
を形成し、この折曲部に、水平部材と垂直部材からなる
ダッシュクロスメンバを取付けて略直角三角形の閉断面
構造を形成すると共に、前記ダッシュクロスメンバの垂
直部材に該垂直部材の前方に突出し車巾方向に延びる断
面略台形状のラックマウントブラケットを取付けて該ブ
ラケットにステアリング機構のラックを支持する一方、
前記ダッシュクロスメンバの水平部材及び前記ブラケッ
トの下側部材のみに車巾方向にほぼ全長に渡って連続す
るビードを設けてなる車体のダッシュロア構造。
1. A dash lower member is formed by bending a lower portion of a dash board partitioning a cabin and an engine room obliquely rearward, and a dash cross member including a horizontal member and a vertical member is attached to the bent portion. A right-angled triangle closed cross-section structure is formed, and a rack mount bracket having a substantially trapezoidal cross section that protrudes forward of the vertical member and extends in the vehicle width direction is attached to the vertical member of the dash cross member, and the rack of the steering mechanism is attached to the bracket. While supporting
A dash lower structure for a vehicle body, in which beads that are continuous over substantially the entire length in the vehicle width direction are provided only on the horizontal member of the dash cross member and the lower member of the bracket.
JP1988033630U 1988-03-16 1988-03-16 Body dash floor structure Expired - Lifetime JPH0634207Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988033630U JPH0634207Y2 (en) 1988-03-16 1988-03-16 Body dash floor structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988033630U JPH0634207Y2 (en) 1988-03-16 1988-03-16 Body dash floor structure

Publications (2)

Publication Number Publication Date
JPH01145667U JPH01145667U (en) 1989-10-06
JPH0634207Y2 true JPH0634207Y2 (en) 1994-09-07

Family

ID=31260321

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988033630U Expired - Lifetime JPH0634207Y2 (en) 1988-03-16 1988-03-16 Body dash floor structure

Country Status (1)

Country Link
JP (1) JPH0634207Y2 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5120327A (en) * 1974-08-12 1976-02-18 Nissan Motor Shototsujiniokeru jidoshano sutearinguhoiiruidosochi
JPH0439808Y2 (en) * 1985-03-07 1992-09-17

Also Published As

Publication number Publication date
JPH01145667U (en) 1989-10-06

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