JP3653931B2 - Joint structure of vehicle frame - Google Patents

Joint structure of vehicle frame Download PDF

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Publication number
JP3653931B2
JP3653931B2 JP14943797A JP14943797A JP3653931B2 JP 3653931 B2 JP3653931 B2 JP 3653931B2 JP 14943797 A JP14943797 A JP 14943797A JP 14943797 A JP14943797 A JP 14943797A JP 3653931 B2 JP3653931 B2 JP 3653931B2
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JP
Japan
Prior art keywords
pipe
vehicle
main body
side member
cross member
Prior art date
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Expired - Lifetime
Application number
JP14943797A
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Japanese (ja)
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JPH10338161A (en
Inventor
洋 中川
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.)
Isuzu Motors Ltd
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Isuzu Motors 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
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Priority to JP14943797A priority Critical patent/JP3653931B2/en
Publication of JPH10338161A publication Critical patent/JPH10338161A/en
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Publication of JP3653931B2 publication Critical patent/JP3653931B2/en
Anticipated expiration legal-status Critical
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Description

【０００１】
【発明の属する技術分野】
本発明は、車両のフレームを構成するサイドメンバと、両サイドメンバの間に渡って配設されるクロスメンバの結合部であるジョイントの構造に関する。
【０００２】
【従来の技術】
図１は、本発明が適用される車両の構造を示す説明図である。
全体を符号１で示す車両は、フレーム２０の上部に車体１０が搭載された構造を有する。
フレーム２０は、車両の両側に車両の軸線方向に平行に配設されるサイドメンバ２２と、サイドメンバ２２の間に渡って配設される複数のクロスメンバ３０を備えるもので、はしご形フレーム（ラダーフレーム）と称されている。
【０００３】
図４は、サイドメンバとクロスメンバのジョイント部の構造の一例を示す。
全体を符号３０で示すクロスメンバは、コ字形に折り曲げられたハット形の断面形状を有する第１のメンバ３１と、平板状の第２のメンバ３２を溶接した構造を有し、第１のメンバ３１の端面を外側に開いてフランジ部３３を形成し、サイドメンバ２２に溶接してジョイント部を形成している。
はしご形フレームにあっては、両サイドメンバ２２に対して車両の前後方向に互に反対方向の入力が作用したときの剛性を確保する対策が重要な問題となる。上述した構造にあっては、ジョイント部に作用する曲げ入力に対する剛性が充分でないことが起こる。
【０００４】
図５は、サイドメンバ２２とクロスメンバ３０のジョイント部の上下に板材３４を溶接したジョイント部を示す。このジョイント部は、車両の前後方向の曲げ入力に対する剛性を向上することはできるが、車両の上下方向の曲げ入力に対する剛性は充分ではない。
【０００５】
図６は、サイドメンバ３０としてパイプ３５を使用し、パイプ３５の先端をサイドメンバ２２に開口する丸穴に貫通させて両者を溶接部Ｗ1で固着する構造を示す。
このジョイント部は、クロスメンバに作用する捩り入力に対する剛性は高いが、車両の前後、上下方向の剛性は充分でないこともあり、また、パイプをクロスメンバに対して貫通させる工数を必要とする。
【０００６】
【発明が解決しようとする課題】
そこで本発明は、車両の前後、上下方向の入力に対して高い剛性を発揮する。軽量かつ低コストのジョイント部の構造を提供するものである。
【０００７】
【課題を解決するための手段】
本発明のジョイント部の構造は、車両の両側に配設される車両の前後方向に延びるサイドメンバと、両サイドメンバの間に渡って配設されるクロスメンバとを結合するジョイント部に適用され、その構造は、クロスメンバを形成するパイプ状本体と、パイプ状本体とサイドメンバを結合する半裁状のラッパ形状を有するブレースを備えるものである。そして、ブレースは、サイドメンバに対して溶接される大径の開口端に形成される第１のフランジ部と、パイプ状本体に溶接される小径の開口端に形成される第２のフランジ部を有し、第１のフランジ部は、車両の上下方向に対して前後方向により大きな寸法で拡がるものである。
また、クロスメンバのパイプ状本体の先端部とサイドメンバとを結合するブラケットを備えるものである。さらに、クロスメンバのパイプ状本体の先端部は、サイドメンバとの間に間隙を有して結合されるものである。
【０００８】
【発明の実施の形態】
図２は本発明のサイドメンバ２２と、クロスメンバ３０のジョイント部の構造を示す斜視図、図３は図２のＥ−Ｅ断面図である。
全体を符号３０で示すクロスメンバはパイプ状の本体４０を有し、本体４０の両端とサイドメンバ２２の間を連結するブレース５０によりジョイント部が構成される。
ブレース５０は、ラッパを半分に割ったものに似た形状を有し、大径の開口側に形成されるフランジ部５２をサイドメンバ２２の内壁部に溶接し、小径の開口側に形成される第２のフランジ部５４をパイプ状の本体４０の外周面に溶接することでジョイント部が構成される。
【０００９】
第１のフランジ部５２の車両の前後方向に延びる端部５３は、上下方向の端部より外側に拡げられており、ジョイント部に作用する車両の前後方向の入力に対して充分な剛性を確保している。
また、第１のフランジ部５２の端部５３は、パイプ状本体４０の中心位置よりも下方に延びており、車両の上下方向に作用する入力に対しても充分な剛性を確保している。
【００１０】
このジョイント部は、パイプ状本体４０の先端部４１と、サイドメンバ２２の内壁面との間に間隙Ｇ1が存在するように構成される。したがって、サイドメンバ２２は、パイプ状の本体４０の先端部４１を受け入れる構造を必要としない。このパイプ状本体４０の先端部近傍にブラケット６０を溶接しておき、ブラケット６０のフランジ部６２をサイドメンバ２２の内壁面に溶接することによって、ジョイント部の剛性をより向上させることができる。
【００１１】
このブラケット６０は、板状部６１にパイプ状本体を受け入れる丸穴を有し、パイプ状本体４０を貫通させて両者を溶接する構造を採用している。
ブラケット６０をパイプ状本体４０の両端部に予め溶接してサブアッセンブリユニットを構成しておくことにより、サイドメンバに対するジョイント作業を簡素化することができる。
【００１２】
【発明の効果】
本発明は以上のように、車両のフレームを構成するサイドメンバとクロスメンバのジョイント部の構造にあって、パイプ状のクロスメンバ本体を使用することによって、安価なメンバを得ることができ、また、半裁したラッパ状のブレースを用いて、ジョイント部を構成することによって、車両の前後、上下方向に対する構成を確保することができる。
【００１３】
さらに、パイプ状本体の先端部にブラケットを溶接しておき、ブラケットのフランジ部をサイドメンバに溶接することによって、より剛性を向上することができる。
また、ジョイント部の接合作業も容易に達成することができる。
【図面の簡単な説明】
【図１】本発明を実施する車両の概要を示す斜視図。
【図２】本発明のジョイント構造を示す斜視図。
【図３】図２のＥ−Ｅ断面図。
【図４】ジョイント構造の従来例を示す説明図。
【図５】ジョイント構造の従来例を示す説明図。
【図６】ジョイント構造の従来例を示す説明図。
【符号の説明】
１ 車両
１０ 車体
２０ フレーム
２２ サイドメンバ
３０ クロスメンバ
４０ クロスメンバのパイプ状本体
５０ ブレース
６０ ブラケット[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a joint which is a connecting portion of a side member constituting a frame of a vehicle and a cross member disposed between both side members.
[0002]
[Prior art]
FIG. 1 is an explanatory diagram showing the structure of a vehicle to which the present invention is applied.
The vehicle denoted by reference numeral 1 as a whole has a structure in which a vehicle body 10 is mounted on an upper portion of a frame 20.
The frame 20 includes a side member 22 disposed on both sides of the vehicle in parallel to the axial direction of the vehicle, and a plurality of cross members 30 disposed between the side members 22. It is called a ladder frame.
[0003]
FIG. 4 shows an example of the structure of the joint part of the side member and the cross member.
The cross member generally indicated by reference numeral 30 has a structure in which a first member 31 having a hat-shaped cross-sectional shape bent in a U-shape and a flat plate-like second member 32 are welded to each other. A flange portion 33 is formed by opening the end face 31 to the outside, and a joint portion is formed by welding to the side member 22.
In the ladder-type frame, a measure for securing rigidity when inputs in opposite directions are applied to both side members 22 in the longitudinal direction of the vehicle is an important problem. In the structure described above, the rigidity against the bending input acting on the joint portion may not be sufficient.
[0004]
FIG. 5 shows a joint portion in which plate members 34 are welded to the upper and lower sides of the joint portion of the side member 22 and the cross member 30. Although this joint part can improve the rigidity with respect to the bending input in the longitudinal direction of the vehicle, the rigidity with respect to the bending input in the vertical direction of the vehicle is not sufficient.
[0005]
FIG. 6 shows a structure in which a pipe 35 is used as the side member 30, the tip of the pipe 35 is passed through a round hole opened in the side member 22, and both are fixed by a welded portion W 1 .
This joint portion has high rigidity against torsional input acting on the cross member, but the rigidity in the front-rear and vertical directions of the vehicle may not be sufficient, and man-hours for penetrating the pipe through the cross member are required.
[0006]
[Problems to be solved by the invention]
Therefore, the present invention exhibits high rigidity with respect to inputs in the front-rear and vertical directions of the vehicle. A lightweight and low-cost joint structure is provided.
[0007]
[Means for Solving the Problems]
The structure of the joint portion of the present invention is applied to a joint portion that couples a side member extending in the front-rear direction of the vehicle disposed on both sides of the vehicle and a cross member disposed between the side members. The structure includes a pipe-shaped main body forming a cross member and a brace having a semi-circular trumpet shape for connecting the pipe-shaped main body and the side member. The brace includes a first flange portion formed at the large-diameter open end welded to the side member, and a second flange portion formed at the small-diameter open end welded to the pipe-shaped body. The first flange portion has a larger dimension in the front-rear direction with respect to the vertical direction of the vehicle.
Moreover, the bracket which couple | bonds the front-end | tip part of a pipe-shaped main body of a cross member and a side member is provided. Furthermore, the tip of the pipe-shaped main body of the cross member is joined with a gap between the side member.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 is a perspective view showing the structure of the joint portion of the side member 22 and the cross member 30 of the present invention, and FIG. 3 is a cross-sectional view taken along the line EE of FIG.
A cross member generally indicated by reference numeral 30 has a pipe-shaped main body 40, and a joint portion is constituted by braces 50 that connect both ends of the main body 40 and the side members 22.
The brace 50 has a shape similar to that obtained by dividing the trumpet in half, and is formed on the small diameter opening side by welding a flange portion 52 formed on the large diameter opening side to the inner wall portion of the side member 22. The joint portion is formed by welding the second flange portion 54 to the outer peripheral surface of the pipe-shaped main body 40.
[0009]
The end portion 53 of the first flange portion 52 extending in the front-rear direction of the vehicle is expanded outward from the end portion in the up-down direction, and sufficient rigidity is ensured with respect to the input in the front-rear direction of the vehicle acting on the joint portion. doing.
Further, the end 53 of the first flange portion 52 extends downward from the center position of the pipe-shaped main body 40, and ensures sufficient rigidity with respect to the input acting in the vertical direction of the vehicle.
[0010]
The joint portion is configured such that a gap G 1 exists between the distal end portion 41 of the pipe-shaped main body 40 and the inner wall surface of the side member 22. Therefore, the side member 22 does not require a structure for receiving the tip portion 41 of the pipe-shaped main body 40. By welding the bracket 60 in the vicinity of the distal end portion of the pipe-shaped main body 40 and welding the flange portion 62 of the bracket 60 to the inner wall surface of the side member 22, the rigidity of the joint portion can be further improved.
[0011]
This bracket 60 employs a structure in which a plate-like portion 61 has a round hole for receiving a pipe-like main body, and the pipe-like main body 40 is penetrated to weld both.
By welding the bracket 60 to both ends of the pipe-shaped main body 40 in advance to form a subassembly unit, the joint work for the side member can be simplified.
[0012]
【The invention's effect】
As described above, the present invention is in the structure of the joint portion of the side member and the cross member constituting the frame of the vehicle. By using the pipe-shaped cross member main body, an inexpensive member can be obtained. By configuring the joint portion using the half-cut trumpet-shaped brace, it is possible to ensure the configuration in the front-rear direction and the vertical direction of the vehicle.
[0013]
Furthermore, the rigidity can be further improved by welding a bracket to the tip of the pipe-shaped main body and welding the flange portion of the bracket to the side member.
Moreover, the joining operation of the joint portion can be easily achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an outline of a vehicle implementing the present invention.
FIG. 2 is a perspective view showing a joint structure of the present invention.
3 is a cross-sectional view taken along the line E-E in FIG. 2;
FIG. 4 is an explanatory view showing a conventional example of a joint structure.
FIG. 5 is an explanatory view showing a conventional example of a joint structure.
FIG. 6 is an explanatory view showing a conventional example of a joint structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vehicle 10 Car body 20 Frame 22 Side member 30 Cross member 40 Pipe-shaped main body 50 of a cross member Brace 60 Bracket

Claims (1)

車両の両側に配設される車両の前後方向に延びるサイドメンバ２２と、両サイドメンバ２２の間に渡って配設されるクロスメンバ３０とを結合するジョイント部の構造であって、
クロスメンバを形成するパイプ状本体４０と、パイプ状本体４０とサイドメンバ２２を結合する半裁状のラッパ形状を有するブレース５０を備え、ブレース５０は、サイドメンバ２２に対して溶接される大径の開口端に形成される第１のフランジ部５２と、パイプ状本体４０に対して上方から被せるように当接して溶接される小径の開口端に形成される第２のフランジ部５４を有し、第１のフランジ部５２は、車両の上下方向に対して前後方向により大きな寸法で拡がる形状を有するとともに、クロスメンバのパイプ状本体４０の先端部とサイドメンバ２２とを溶接により結合するブラケット６０を備え、クロスメンバのパイプ状本体４０の先端部は、サイドメンバ２２との間に間隙Ｇ １ を有して結合される車両のフレームのジョイント部構造。A structure of a joint portion that couples a side member 22 extending in the front-rear direction of the vehicle disposed on both sides of the vehicle and a cross member 30 disposed between the side members 22 ,
A pipe-like main body 40 forming a cross member, and a brace 50 having a semi-circular trumpet shape for joining the pipe-like main body 40 and the side member 22 are provided . The brace 50 has a large diameter that is welded to the side member 22. A first flange portion 52 formed at the open end, and a second flange portion 54 formed at the small-diameter open end that is welded so as to cover the pipe-shaped main body 40 from above, The first flange portion 52 has a shape that expands in a larger dimension in the front-rear direction with respect to the vertical direction of the vehicle, and a bracket 60 that joins the distal end portion of the pipe-like main body 40 of the cross member and the side member 22 by welding. provided, the leading end portion of the pipe-shaped body 40 of the cross member, the joint portion structure of a frame of a vehicle to be coupled with a gap G 1 between the side members 22 Made.
JP14943797A 1997-06-06 1997-06-06 Joint structure of vehicle frame Expired - Lifetime JP3653931B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14943797A JP3653931B2 (en) 1997-06-06 1997-06-06 Joint structure of vehicle frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14943797A JP3653931B2 (en) 1997-06-06 1997-06-06 Joint structure of vehicle frame

Publications (2)

Publication Number Publication Date
JPH10338161A JPH10338161A (en) 1998-12-22
JP3653931B2 true JP3653931B2 (en) 2005-06-02

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001233254A (en) * 2000-02-22 2001-08-28 Mitsubishi Automob Eng Co Ltd Vehicle body structure
US7144040B2 (en) * 2002-03-19 2006-12-05 Dana Corporation Bi-metallic structural component for vehicle frame assembly
WO2005077735A1 (en) * 2004-02-17 2005-08-25 Hiruta-Kogyo Co., Ltd. Chassis frame and method of manufacturing chassis frame
JP5797517B2 (en) * 2011-10-05 2015-10-21 日野自動車株式会社 Body frame connecting member and body frame structure
KR101357330B1 (en) * 2012-02-29 2014-02-11 쌍용자동차 주식회사 sub-frame of automobile
US8979173B2 (en) 2012-03-29 2015-03-17 Honda Motor Co., Ltd. Vehicle body floor structure for automobile
JP5480324B2 (en) * 2012-03-29 2014-04-23 本田技研工業株式会社 Car body side structure
JP6245231B2 (en) 2015-07-31 2017-12-13 トヨタ自動車株式会社 Body frame reinforcement structure
JP6683293B2 (en) * 2018-04-09 2020-04-15 日本製鉄株式会社 Automotive T-joint structure
JP7139817B2 (en) * 2018-09-19 2022-09-21 マツダ株式会社 Suspension subframe structure
CN110509999A (en) * 2019-10-08 2019-11-29 湖南恒润汽车有限公司 A kind of passenger car lower body structure

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JPS6377867U (en) * 1986-11-10 1988-05-23
JPH0498683U (en) * 1991-01-31 1992-08-26
JPH0577762A (en) * 1991-09-19 1993-03-30 Suzuki Motor Corp Cross member connecting structure for car

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