KR100462399B1 - Impact absorption structure of automobile front side member - Google Patents
Impact absorption structure of automobile front side member Download PDFInfo
- Publication number
- KR100462399B1 KR100462399B1 KR10-2002-0065207A KR20020065207A KR100462399B1 KR 100462399 B1 KR100462399 B1 KR 100462399B1 KR 20020065207 A KR20020065207 A KR 20020065207A KR 100462399 B1 KR100462399 B1 KR 100462399B1
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- KR
- South Korea
- Prior art keywords
- front side
- side member
- cross
- bumper
- coupled
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
- B62D21/152—Front or rear frames
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D27/00—Connections between superstructure or understructure sub-units
- B62D27/02—Connections between superstructure or understructure sub-units rigid
- B62D27/023—Assembly of structural joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2306/00—Other features of vehicle sub-units
- B60Y2306/01—Reducing damages in case of crash, e.g. by improving battery protection
Abstract
본 발명은 자동차용 프론트사이드멤버의 충격흡수구조에 관한 것으로서, 보다 상세하게는 프론트사이드멤버를 강도가 서로 다른 두 개의 부재로 구성하여 강도가 큰 부재의 단면을 크게 해줌으로써 차량 충돌시 충격하중에 의해 강도가 상대적으로 약한 부재가 먼저 변형하도록 유도하여 충격흡수가 이루어지도록 한 자동차용 프론트사이드멤버의 충격흡수구조에 관한 것이다.The present invention relates to a shock absorbing structure of a front side member for a vehicle. More specifically, the front side member is composed of two members having different strengths, thereby increasing the cross section of a member having a large strength, thereby reducing the impact load during a vehicle collision. The present invention relates to a shock absorbing structure of a front side member for a vehicle in which a member having a relatively weak strength is deformed first to thereby absorb a shock.
본 발명은, 범퍼백빔의 후방에 형성된 범퍼스테이가 프론트사이드멤버와 결합되는 프론트사이드멤버의 결합 구조에 있어서, 상기 프론트사이드멤버는 박스형상을 갖는 프론트멤버와 리어멤버로 양분되어, 상기 프론트멤버의 선단부는 상기 범퍼스테이와 결합되고, 상기 프론트멤버의 후단부에는 상기 리어멤버의 선단부가 끼워 결합되며, 상기 프론트멤버에 끼워진 리어멤버의 선단부 바로 뒤쪽은 상기 프론트멤버보다 단면이 확대되는 단면확대부가 형성된 자동차용 프론트사이드멤버의 충격흡수구조이다.According to the present invention, in the coupling structure of the front side member in which the bumper stay formed at the rear of the bumper back beam is coupled to the front side member, the front side member is divided into a front member and a rear member having a box shape, The front end is coupled to the bumper stay, and the rear end of the front member is coupled to the front end of the rear member, and the rear end of the rear member fitted to the front member has a cross-sectional enlargement portion that is larger in cross section than the front member. The shock absorbing structure of the front side member for automobiles.
Description
본 발명은 자동차용 프론트사이드멤버의 충격흡수구조에 관한 것으로서, 보다 상세하게는 프론트사이드멤버를 강도가 서로 다른 두 개의 부재로 구성하여 강도가 큰 부재의 단면을 크게 해줌으로써 차량 충돌시 충격하중에 의해 강도가 상대적으로 약한 부재가 먼저 변형하도록 유도하여 충격흡수가 이루어지도록 한 자동차용 프론트사이드멤버의 충격흡수구조에 관한 것이다.The present invention relates to a shock absorbing structure of a front side member for a vehicle. More specifically, the front side member is composed of two members having different strengths, thereby increasing the cross section of a member having a large strength, thereby reducing the impact load during a vehicle collision. The present invention relates to a shock absorbing structure of a front side member for a vehicle in which a member having a relatively weak strength is deformed first to thereby absorb a shock.
프론트사이드멤버는 프론트바디를 지지하는 가장 중요한 골격부재로서, 대시패널 아랫부분에서부터 프론트플로워 아랫면까지를 결합하여 차체의 프론트바디가 지녀야 할 강도 및 강성을 확보한다.The front side member is the most important skeletal member supporting the front body, and combines from the bottom of the dash panel to the bottom of the front follower to secure the strength and rigidity of the front body of the body.
또한, 프론트사이드멤버는 프론트서스펜션으로부터 전달된 하중을 지지함과 동시에 전방 충돌시 입력되는 다소 경미한 충격에너지에 대해서는 변형되지 않고 지탱되며 큰 충격에너지에 대해서는 프론트사이드멤버의 길이방향으로 접히는 좌굴(坐屈)변형이 일어남으로써 그 충격에너지를 충분히 흡수할 수 있어야 한다.In addition, the front side member supports the load transmitted from the front suspension and at the same time, it is not deformed against the slight impact energy input during the front collision, and the buckling is folded in the longitudinal direction of the front side member for the large impact energy. It must be able to absorb the impact energy sufficiently by deformation.
다시 말하면, 저속에서의 충돌시에는 차체의 변형이 없도록 충분한 강도가 필요하고, 고속에서의 충돌시에는 프론트사이드멤버가 변형되는 것에 의하여 에너지를 흡수한다.In other words, sufficient strength is required so that there is no deformation of the vehicle body at the time of collision at low speed, and energy is absorbed by the deformation of the front side member at the time of collision at high speed.
상기와 같이 구성되는 프론트사이드멤버의 선단은 통상적으로 범퍼스테이를 매개로 범퍼백빔과 결합된다.The front end of the front side member configured as described above is typically coupled to the bumper back beam via the bumper stay.
이렇게 범퍼백빔의 후방에 형성된 범퍼스테이는 자동차의 양측에 차체길이방향으로 위치된 프론트사이드멤버의 선단에 결합되어 범퍼에 입력된 충격력을 프론트사이드멤버로 전달하게 되는 것이다.Thus, the bumper stay formed at the rear of the bumper back beam is coupled to the front end member of the front side member located in the vehicle body length direction on both sides of the vehicle to transmit the impact force input to the bumper to the front side member.
도1은 종래 프론트 사이드멤버와 범퍼의 결합 구조를 나타낸 개략 단면도이다.1 is a schematic cross-sectional view showing a coupling structure of a conventional front side member and a bumper.
도1에서 보면 범퍼백빔(10)에는 그 후방으로 범퍼스테이(11)가 형성되고, 그 범퍼스테이(11)는 프론트사이드멤버(20)의 선단으로 삽입되어 프론트사이드멤버(20)의 일 측면에서 삽입되는 볼트(21)에 의해 고정 결합된다. 물론 상기 범퍼스테이(11)에는 당연히 상기 볼트(21)에 대응되는 나사산(미도시)이 형성되어서 볼트(21)에 의해 프론트사이드멤버(20)에 고정 설치된다.Referring to FIG. 1, a bumper stay 11 is formed at a rear side of the bumper back beam 10, and the bumper stay 11 is inserted into the front end of the front side member 20, and at one side of the front side member 20. It is fixedly coupled by the bolt 21 is inserted. Of course, the bumper stay 11 has a thread (not shown) corresponding to the bolt 21, and is fixed to the front side member 20 by the bolt 21.
그러나, 위에서 설명한 바와 같은 종래의 프론트사이드멤버 구조에서는 범퍼백빔으로부터 충격이 입력되면 범퍼백빔과 결합된 프론트사이드멤버의 선단에서는 충격흡수가 되지 않고 그 충격이 후방으로 전달되어 대쉬부의 사이드멤버를 변형시키게 되어 충격흡수 측면에서 불리한 면을 갖는 문제점이 있다.However, in the conventional front side member structure as described above, when a shock is input from the bumper back beam, the shock is not absorbed at the front end of the front side member coupled with the bumper back beam, and the shock is transmitted to the rear to deform the side member of the dash part. There is a problem in that it has a disadvantage in terms of shock absorption.
본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 제안된 것으로서, 그 목적은 범퍼백빔으로부터 충격이 가해지면 범퍼백빔과 연결된 프론트사이드멤버의 선단부가 충분히 변형되어 충격흡수가 이루어지도록 프론트사이드멤버를 강도와 단면이 서로 다른 두 개의 부재로 구성하여 강도가 큰 부재의 단면을 크게 구성함으로써 충돌시 강도가 상대적으로 약한 부재가 용이하게 변형되도록 하는데 있다.The present invention has been proposed in order to solve the problems described above, and its object is that the front end member of the front side member connected to the bumper back beam is sufficiently deformed when the impact is applied from the bumper back beam, so that the front side member has strength and strength. It is composed of two members having different cross sections so that a large cross section of a member having high strength can be easily deformed by a member having a relatively low strength during collision.
도1은 종래 프론트 사이드멤버와 범퍼의 결합 구조를 나타낸 개략 단면도,1 is a schematic cross-sectional view showing a coupling structure of a conventional front side member and a bumper;
도2는 본 발명에 따른 프론트사이드멤버의 충격흡수구조를 나타낸 사시도,Figure 2 is a perspective view showing the shock absorbing structure of the front side member according to the present invention,
도3a 및 도3b는 본 발명의 작용 상태도.Figures 3a and 3b is a working state of the present invention.
※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※
10 : 범퍼백빔 11 : 범퍼스테이10: bumper back beam 11: bumper stay
30 : 프론트사이드멤버 31 : 프론트멤버30: front side member 31: front member
32 : 리어멤버 32a : 단면확대부32: rear member 32a: section enlargement
상기의 목적을 달성하기 위한 본 발명은, 범퍼백빔의 후방에 형성된 범퍼스테이가 프론트사이드멤버와 결합되는 프론트사이드멤버의 결합 구조에 있어서, 상기 프론트사이드멤버는 박스형상을 갖는 프론트멤버와 리어멤버로 양분되어, 상기 프론트멤버의 선단부는 상기 범퍼스테이와 결합되고, 상기 프론트멤버의 후단부에는 상기 리어멤버의 선단부가 끼워 결합되며, 상기 프론트멤버에 끼워진 리어멤버의 선단부 바로 뒤쪽은 상기 프론트멤버보다 단면이 확대되는 단면확대부가 형성된 자동차용 프론트사이드멤버의 충격흡수구조이다.The present invention for achieving the above object, in the coupling structure of the front side member in which the bumper stay formed in the rear of the bumper back beam is coupled to the front side member, the front side member is a front member and a rear member having a box shape Bidirectionally, the front end of the front member is coupled to the bumper stay, and the rear end of the front member is coupled to the front end of the rear member, and the rear end of the rear member fitted to the front member has a cross section than the front member. It is a shock absorbing structure of the front side member for a vehicle in which the enlarged cross-sectional enlargement is formed.
이하, 본 발명의 구성을 첨부된 도면에 의거하여 설명한다.EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated based on attached drawing.
도2는 본 발명에 따른 프론트사이드멤버의 충격흡수구조를 나타낸 사시도이고, 도3a 및 도3b는 본 발명의 작용 상태도이다.Figure 2 is a perspective view showing a shock absorbing structure of the front side member according to the present invention, Figures 3a and 3b is an operational state diagram of the present invention.
이상의 도면을 참조하여 본 발명을 설명하면, 본 발명은 프론트사이드멤버(30)에 길이방향으로 입력되는 충격을 범퍼백빔(10)과 연결되는 프론트사이드멤버(30)의 선단에서 용이하게 흡수할 수 있도록 두 개의 서로 다른 부재(31,32)를 길이방향으로 결합하여 프론트사이드멤버(30)를 구성한다. 즉, 프론트사이드멤버(30)는 두 개의 서로 다른 부재(31,32)로 양분되는데, 그 양분된 부재중 프론트사이드멤버(30)의 앞쪽에 위치되는 부재를 프론트멤버(31), 프론트사이드멤버(30)의 뒤쪽에 위치되는 부재를 리어멤버(32)라고 한다.Referring to the present invention with reference to the drawings, the present invention can easily absorb the shock input to the front side member 30 in the longitudinal direction at the tip of the front side member 30 is connected to the bumper back beam (10). Two different members 31 and 32 are coupled in the longitudinal direction to form the front side member 30. That is, the front side member 30 is divided into two different members 31 and 32, and the member located in front of the front side member 30 among the divided members is the front member 31 and the front side member ( The member located behind the 30 is called the rear member 32.
이때, 상기 프론트멤버(31)보다 뒤쪽에 배치되는 리어멤버(32)의 강도와 단면을 크게 함으로써 충돌시 충격하중에 의해 상대적으로 강도가 약한 프론트멤버(31)가 먼저 변형되도록 유도함으로써 충격에너지를 흡수하도록 하는 것이다.At this time, by increasing the strength and cross-section of the rear member 32 disposed behind the front member 31, the impact energy is induced by causing the front member 31, which is relatively weak, to be deformed first by the impact load during collision. To absorb it.
상기 프론트멤버(31)의 선단부는 범퍼백빔(10)의 후방에 형성된 범퍼스테이(11)와 결합되고, 상기 프론트멤버(31)의 후단부에는 상기 리어멤버(32)의 선단부가 끼워져 결합되는데, 그 결합부위는 용접되는 것이 바람직하다.The front end of the front member 31 is coupled to the bumper stay 11 formed at the rear of the bumper back beam 10, and the front end of the rear member 32 is fitted to the rear end of the front member 31. The joining site is preferably welded.
이때, 상기 프론트멤버(31)에 끼워진 리어멤버(32)의 선단부 바로 뒤쪽은 상기 프론트멤버(31)보다 내부 단면적이 확대되는 단면확대부(32a)가 형성된다.At this time, the front end portion of the rear member 32 fitted to the front member 31 is formed with a cross-sectional enlarged portion 32a having an inner cross-sectional area larger than the front member 31.
여기서, 상기 단면확대부(32a)는 박스형상으로 형성된 상기 리어멤버(32)의4면 모두에 형성되는데, 상기 단면확대부(32a)가 갖는 효과는 후술하는 본 발명의 작용에서 보다 상세하게 설명하기로 한다.Here, the cross-sectional enlarged portion (32a) is formed on all four sides of the rear member 32 formed in a box shape, the effect of the cross-sectional enlarged portion (32a) will be described in more detail in the operation of the present invention to be described later Let's do it.
또한, 상기 프론트멤버(31)의 강도보다 리어멤버(32)의 강도가 더 크게 구성되도록 상기 프론트멤버(31)는 35kg급 고강도 강판으로 두께 1.4t를 갖도록 하고, 상기 리어멤버(32)는 60kg급 초고강도 강판으로 두께 1.8t를 갖도록 구성한다.In addition, the front member 31 is a 35kg high strength steel sheet having a thickness of 1.4t so that the strength of the rear member 32 is greater than the strength of the front member 31, the rear member 32 is 60kg It is a grade ultra high strength steel sheet and is configured to have a thickness of 1.8t.
즉, 상기 리어멤버(32)는 프론트멤버(31)보다 재질이 강하고 두께가 커서 더 큰 강도를 가질 뿐만 아니라 상술한 바와 같이 단면확대부(32a)가 형성되어 있어서, 상기 프론트멤버(31)의 선단부로 충격이 입력되면 프론트멤버(31)가 변형을 일으키기 전에 프론트멤버(31)와 리어멤버(32)의 용접부위가 먼저 파단이 되고, 상기 프론트멤버(31)가 후방으로 밀리면서 상기 리어멤버(32)의 단면확대부(32a)에 의해 벌어지면서 변형되어 충격을 흡수하게 된다.That is, the rear member 32 is stronger than the front member 31 and has a larger thickness, and thus has a greater strength. As described above, the rear member 32 is formed with a cross-sectional enlarged portion 32a. When an impact is input to the front end, the welded portion of the front member 31 and the rear member 32 is first broken before the front member 31 causes deformation, and the front member 31 is pushed backwards to the rear member. It is deformed while being opened by the cross-sectional enlarged portion 32a of (32) to absorb the impact.
이하, 본 발명의 작용을 첨부된 도3a 및 도3b에 의거하여 설명한다.Hereinafter, the operation of the present invention will be described with reference to Figs. 3A and 3B.
도3a는 프론트멤버(31)와 리어멤버(32)로 양분된 프론트사이드멤버(30)에 충격에너지가 입력되기 전의 상태를 나타낸 것이다. 상기 프론트사이드멤버(30)의 프론트멤버(31) 선단에는 범퍼백빔(10)이 범퍼스테이(11)를 매개로 설치되어 있다.Figure 3a shows a state before the impact energy is input to the front side member 30 divided into the front member 31 and the rear member 32. A bumper back beam 10 is installed at the front end of the front member 31 of the front side member 30 via the bumper stay 11.
이 상태에서 차량이 전방충돌을 하여서 상기 범퍼백빔(10)으로 충격에너지가 입력되면 그 충격에너지는 범퍼스테이(11)를 매개로 상기 프론트멤버(31)의 선단부로 전달이 되는데, 이때 상기 프론트멤버(31)는 후방의 리어멤버(32) 쪽으로 밀리면서 프론트멤버(31)의 후단부가 리어멤버(32) 선단부의 단면확대부(32a)를 따라 변형되면서 도3b와 같이 충격에너지가 흡수된다.In this state, when the vehicle collides with the front and the impact energy is input to the bumper back beam 10, the impact energy is transmitted to the front end of the front member 31 via the bumper stay 11, wherein the front member Numeral 31 is pushed toward the rear member 32 at the rear side, and the rear end portion of the front member 31 is deformed along the sectional enlargement portion 32a of the front end portion of the rear member 32, so that impact energy is absorbed as shown in FIG.
이때, 상기 프론트멤버(31)는 리어멤버(32)보다 강도 및 단면적이 작아 리어멤버(32)보다 더 쉽게 변형되므로 충격이 입력되면 프론트사이드멤버(30)의 선단부, 즉 프론트멤버(31)에서부터 충격흡수가 이루어지게 되는 것이다.At this time, since the front member 31 has a smaller strength and cross-sectional area than the rear member 32 and is more easily deformed than the rear member 32, when the impact is input, the front member 31, that is, from the front member 31 Shock absorption will be made.
상술한 바와 같이 본 발명에 따른 자동차용 프론트사이드멤버의 충격흡수구조에 의하면, 종전의 프론트사이드멤버를 강도와 단면이 서로 다른 두 개의 프론트멤버와 리어멤버로 구성함으로써 범퍼스테이가 장착되는 프론트멤버의 선단부로부터 충격이 입력되면 프론트멤버의 후단부가 리어멤버 선단부의 단면확대부를 따라 변형됨과 동시에 충격을 흡수함으로써 프론트사이드멤버의 전방 충격흡수가 용이한 효과가 있다.As described above, according to the shock absorbing structure of the front side member for a vehicle according to the present invention, the front side member of the front member to which the bumper stay is mounted is formed by configuring the front front member as two front members and rear members having different strengths and cross sections. When an impact is input from the front end, the rear end of the front member is deformed along the cross-sectional enlargement of the front end of the rear member, and at the same time, the front shock absorber can be easily absorbed by absorbing the shock.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0065207A KR100462399B1 (en) | 2002-10-24 | 2002-10-24 | Impact absorption structure of automobile front side member |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2002-0065207A KR100462399B1 (en) | 2002-10-24 | 2002-10-24 | Impact absorption structure of automobile front side member |
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| Publication Number | Publication Date |
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| KR20040036249A KR20040036249A (en) | 2004-04-30 |
| KR100462399B1 true KR100462399B1 (en) | 2004-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR101323622B1 (en) * | 2011-12-28 | 2013-11-08 | 주식회사 엠에스 오토텍 | Front side member of vehicle |
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