KR20100049302A - Bumper capable for minimizing car body damage in low speed crash - Google Patents

Bumper capable for minimizing car body damage in low speed crash Download PDF

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Publication number
KR20100049302A
KR20100049302A KR1020080108406A KR20080108406A KR20100049302A KR 20100049302 A KR20100049302 A KR 20100049302A KR 1020080108406 A KR1020080108406 A KR 1020080108406A KR 20080108406 A KR20080108406 A KR 20080108406A KR 20100049302 A KR20100049302 A KR 20100049302A
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KR
South Korea
Prior art keywords
bumper
impact beam
crash box
low speed
strength
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KR1020080108406A
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Korean (ko)
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KR101031108B1 (en
Inventor
길용길
조희안
길기평
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한화엘앤씨 주식회사
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Priority to KR1020080108406A priority Critical patent/KR101031108B1/en
Publication of KR20100049302A publication Critical patent/KR20100049302A/en
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Publication of KR101031108B1 publication Critical patent/KR101031108B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/34—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means destroyed upon impact, e.g. one-shot type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/023—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/03—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by material, e.g. composite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
    • B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
    • B60R2019/1833—Structural beams therefor, e.g. shock-absorbing made of plastic material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

PURPOSE: A bumper minimizing damage to a car body in the low speed collision is provided to prevent damage to a tailgate and a floor panel by increasing an elongation percentage. CONSTITUTION: A bumper minimizing damage to a car body in the low speed collision comprises am impact beam(10) and crash boxes(22,24). The impact beam contacts with a collision object. The crash box is formed on both sides of the back side longitudinal direction of the impact beam. The crash box contains a second material. The second material has the elongation ratio higher than the first material of the impact beam and has low strength.

Description

저속 충돌시 차체의 손상을 최소화하는 범퍼{Bumper capable for minimizing car body damage in low speed crash}Bumper capable for minimizing car body damage in low speed crash}

본 발명은 범퍼에 관한 것으로, 특히 저속 충돌시 차체의 손상을 최소화하는 범퍼에 관련한다.The present invention relates to a bumper, and more particularly to a bumper that minimizes damage to the vehicle body in low speed collisions.

최근 유럽 범퍼 성능에 새로운 RCAR 성능을 요구하고 있다. 이를 위한 RCAR 평가 방법 중 범퍼 배리어 테스트(bumper barrier test)가 있다.Recently, new bumper performance is required for European bumper performance. One of the RCAR evaluation methods for this is the bumper barrier test.

범퍼 배리어 테스트 중, 전방 충돌시험에서는 차량이 10도 꺾인 강재 고정 벽에 15㎞/h의 속도로 저속 충돌하고, 후장 충돌시험에서는 강재 이동 배리어가 15㎞/h의 속도로 차량에 충돌한다. During the bumper barrier test, the vehicle collides at a slow speed of 15 km / h against the steel fixed wall that is bent by 10 degrees in the forward collision test, and the steel moving barrier collides with the vehicle at a speed of 15 km / h in the thick collision test.

여기서, 요구사항은 차체 손상이 없고 언더라이드(underride)나 오버라이드(override)가 발생하지 않는 것이며, 특히 차체 손상의 평가에는 사이브 부재(side member), 플로어 패널(floor panel), 램프 및 테일 게이트(tailgate)가 주요 평가대상이다.The requirement here is that there is no body damage and no underrides or overrides occur. In particular, the evaluation of the body damage includes side members, floor panels, lamps and tailgates. The tailgate is the main target of evaluation.

그러나, 종래의 범퍼는 임팩트 빔과 크래쉬 박스로 이루어지는데, 임팩트 빔과 크래쉬 박스는 유리섬유매트 열가소성 복합재(Glass Mat Thermoplastic; GMT) 또는 장섬유 강화 복합재(Long Fiber-Reinforced Thermoplastic; LFT) 등의 고강도 플라스틱을 사용하여 제조하기 때문에 크래쉬 박스의 강도가 지나치게 강하여 충돌 에너지를 모두 흡수하지 못하고 오히려 크래쉬 박스에 결합한 사이드 부재에 전달하게 됨으로써 사이드 부재와, 사이드 부재에 연결된 플로어 패널, 램프 및 테일 게이트의 보호가 용이하지 않다. 그런데, 사이드 부재, 플로어 패널 및 테일 게이트는 각각 수리 비용에 상당한 부분을 차지하므로, 결과적으로 저속충돌시 중요 부품의 파손으로 차량 수리비가 증가한다는 문제점이 있다.However, the conventional bumper is composed of an impact beam and a crash box, the impact beam and the crash box is a high strength such as glass fiber mat thermoplastic (GMT) or long fiber-reinforced thermoplastic (LFT) Because the plastic is manufactured using a crash box, the strength of the crash box is so strong that it does not absorb all of the collision energy, but rather transmits it to the side member coupled to the crash box, thereby protecting the side member, the floor panel, the lamp, and the tail gate connected to the side member. Not easy However, since the side member, the floor panel, and the tail gate each occupy a substantial part of the repair cost, there is a problem in that the vehicle repair cost increases due to the breakage of important components during low speed collision.

또한, 크래쉬 박스의 강도를 약하게 하는 방법을 고려할 수 있지만, 크래쉬 박스의 연신율이 작기 때문에 외부의 충격에 의해 쉽게 깨진다는 문제점이 있다.In addition, although a method of weakening the strength of the crash box may be considered, since the elongation of the crash box is small, there is a problem in that it is easily broken by an external impact.

따라서, 본 발명의 목적은 RCAR 시험 및 저속 충돌시 충돌 에너지를 모두 흡수하여 차체의 손상을 최소화하여 차량수리비를 절감할 수 있는 범퍼를 제공하는 것이다.Accordingly, an object of the present invention is to provide a bumper that can reduce vehicle repair costs by minimizing damage to the vehicle body by absorbing both impact energy during RCAR tests and low-speed collisions.

상기의 목적은, 전방에 위치하여 충돌대상과 접촉하는 임팩트 빔; 및 상기 임팩트 빔의 후면 길이방향 양측에 형성된 크래쉬 박스로 이루어지며, 적어도 상기 크래쉬 박스는 상기 임팩트 빔을 구성하는 제 1 재질보다 연신율이 크고 강도가 낮은 제 2 재질을 더 추가하여 구성되는 범퍼에 의해 달성된다.The above object is, the impact beam which is located in front of the contact with the impact object; And a crash box formed on both sides of a rear side of the impact beam in a longitudinal direction, and at least the crash box includes a second material having a higher elongation and a lower strength than the first material constituting the impact beam. Is achieved.

바람직하게, 상기 제 1 재질은 유리섬유매트 열가소성 복합재(Glass Mat Thermoplastic; GMT) 또는 장섬유 강화 복합재(Long Fiber-Reinforced Thermoplastic; LFT)이고, 상기 제 2 재질은 폴리프로필렌(PP)이나 플로이에틸렌(PE)일 수 있다.Preferably, the first material is Glass Mat Thermoplastic (GMT) or Long Fiber-Reinforced Thermoplastic (LFT), and the second material is polypropylene (PP) or polyethylene ( PE).

여기서, 상기 제 1 재질과 제 2 재질은 시트 형상으로 다수 매 적층되고 열 압착될 수 있으며, 상기 제 2 재질의 시트 두께를 조정하여 상기 크래쉬 박스 또는 임팩트 빔의 강도와 연신율을 조정할 수 있다.Here, a plurality of the first material and the second material may be stacked and thermally compressed in a sheet shape, and the strength and elongation of the crash box or the impact beam may be adjusted by adjusting the sheet thickness of the second material.

상기한 구성에 의하면, 크래쉬 박스의 강도가 낮아져 외부로부터 전달되는 충돌 에너지에 쉽게 찌그러들어 충돌 에너지를 흡수함과 동시에 연신율이 크기 때 문에 강도가 낮아져도 쉽게 깨지지 않게 되며, 그 결과 플로어 패널이나 테일 게이트가 손상되는 것을 효과적으로 막을 수 있다.According to the above configuration, the strength of the crash box is lowered, so it is easily crushed by the collision energy transmitted from the outside, so as to absorb the collision energy and the elongation is large, so that the strength is not easily broken even when the strength is lowered. It can effectively prevent the gate from being damaged.

이하, 첨부된 도면을 참조하여 본 발명의 실시예를 설명한다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention.

도 1은 본 발명에 따른 범퍼를 나타내는 부분 사시도이다.1 is a partial perspective view showing a bumper according to the present invention.

도 1을 참조하면, 본 발명에 따른 범퍼는 전방에 위치하여 충돌 대상과 접촉하는 임팩트 빔(10), 임팩트 빔(10)의 후면 길이방향 양측에 일체로 형성된 크래쉬 박스(22, 24)로 이루어진다.Referring to FIG. 1, a bumper according to the present invention includes an impact beam 10 positioned in front and contacting a collision target, and crash boxes 22 and 24 integrally formed on both sides of the impact beam 10 in the longitudinal direction of the rear surface. .

크래쉬 박스(22, 24)는 격자 구조를 이루어 임팩트 빔(10)을 통하여 전달되는 충돌 에너지를 흡수하면서 찌그러지게 된다.The crash boxes 22 and 24 form a lattice structure and are collapsed while absorbing the collision energy transmitted through the impact beam 10.

여기서, 임팩트 빔(10)과 크래쉬 박스(22, 24)는 고강도 플라스틱 재질의 시트를 열 압착하여 성형한다.Here, the impact beam 10 and the crash boxes 22 and 24 are formed by thermocompressing a sheet made of a high strength plastic material.

고강도 플라스틱이란 강화(reinforce)를 통해 플라스틱의 강도를 높인 소재를 말하며, 상기한 바와 같이, 유리섬유매트 열가소성 복합재(Glass Mat Thermoplastic; GMT) 또는 장섬유 강화 복합재(Long Fiber-Reinforced Thermoplastic; LFT) 등이 있다.High-strength plastic refers to a material that increases the strength of the plastic through reinforce, and as described above, glass mat thermoplastic (GMT) or long fiber-reinforced thermoplastic (LFT), etc. There is this.

본 발명에 따르면, 적어도 크래쉬 박스(22, 24)는 고강도 플라스틱보다 강도가 낮고 연신율(elongation)이 큰 재질, 가령 폴리프로필렌(PP)이나 폴리에틸렌(PE) 재질을 함유한다.According to the present invention, at least the crash boxes 22 and 24 contain materials of lower strength and higher elongation than high strength plastics, such as polypropylene (PP) or polyethylene (PE).

이러한 구성에 의하면, 임팩트 빔(10)과 크래쉬 박스(22, 24)의 기본 형상을 이루는 GMT나 LFT는 통상 2 ~ 3%의 연신율을 갖는 반면, 폴리프로필렌이나 폴리에틸렌은 20 ~ 40%의 연신율을 갖기 때문에 크래쉬 박스(22, 24)의 강도가 낮아지면서 연신율이 커진다. 따라서, 크래쉬 박스(22, 24)의 강도가 낮아져 외부로부터 전달되는 충돌 에너지에 쉽게 찌그러들어 충돌 에너지를 흡수함과 동시에 연신율이 크기 때문에 강도가 낮아져도 쉽게 깨지지 않게 된다.According to this configuration, the GMT or LFT forming the basic shape of the impact beam 10 and the crash boxes 22 and 24 usually has an elongation of 2 to 3%, while the polypropylene or polyethylene has an elongation of 20 to 40%. Since the strength of the crash boxes 22 and 24 becomes low, elongation becomes large. Therefore, since the strength of the crash boxes 22 and 24 is lowered, it is easily crushed by the collision energy transmitted from the outside, so as to absorb the collision energy and at the same time the elongation is large, so that the strength is not easily broken.

도 2는 본 발명에 따른 범퍼를 제조하는 방법을 설명하는 개략도이다.2 is a schematic view illustrating a method of manufacturing a bumper according to the present invention.

도 2를 참조하면, 임팩트 빔(10)에 해당하는 부분에 GMT나 LFT 등의 고강도 플라스틱 시트(120)을 적층하고, 크래쉬 박스(22, 24)에 해당하는 부분에 각각 고강도 플라스틱 시트(220, 240)와 폴리프로필렌이나 플리에틸렌 시트(222, 242)를 여러 겹으로 적층한다.Referring to FIG. 2, a high strength plastic sheet 120 such as GMT or LFT is laminated on a portion corresponding to the impact beam 10, and a high strength plastic sheet 220, respectively, on a portion corresponding to the crash boxes 22 and 24. 240 and polypropylene or polyethylene sheets 222 and 242 are laminated in multiple layers.

이때, 폴리프로필렌이나 플리에틸렌 시트(222, 242)의 매수나 두께를 조정함으로써, 크래쉬 박스 전체의 강도와 연신율을 조정할 수 있다.At this time, the strength and elongation of the whole crash box can be adjusted by adjusting the number of sheets and thickness of polypropylene and polyethylene sheets 222 and 242.

이와 같이 형성된 적층 조립체를 하부금형에 넣고 상부금형을 열 압착하여 성형하면, 본 발명에 따른 범퍼가 제조된다.When the laminated assembly thus formed is placed in the lower mold and the upper mold is formed by thermal compression, the bumper according to the present invention is manufactured.

이 실시 예에서는 크래쉬 박스에만 폴리프로필렌이나 플리에틸렌 시트를 적용하는 것을 예로 들었지만, 임팩트 빔에도 이를 적용할 수 있음은 물론이다.In this embodiment, the application of the polypropylene or polyethylene sheet only to the crash box, but it can be applied to the impact beam of course.

이상에서는 본 발명의 실시 예를 중심으로 설명하였지만, 당업자의 수준에서 다양한 변경이나 변형이 가능하다. 따라서, 본 발명의 권리범위는 상기한 실시 예에 한정되어서는 안 되며, 이하에 기술되는 특허청구범위에 의해 해석되어야 할 것 이다.In the above description, the embodiments of the present invention have been described. However, various changes and modifications can be made by those skilled in the art. Therefore, the scope of the present invention should not be limited to the above embodiments, but should be interpreted by the claims described below.

도 1은 본 발명에 따른 범퍼를 나타내는 부분 사시도이다.1 is a partial perspective view showing a bumper according to the present invention.

도 2는 본 발명에 따른 범퍼를 제조하는 방법을 설명하는 개략도이다.2 is a schematic view illustrating a method of manufacturing a bumper according to the present invention.

Claims (4)

차량의 범퍼에 있어서,In the bumper of the vehicle, 전방에 위치하여 충돌대상과 접촉하는 임팩트 빔; 및An impact beam positioned in front of and in contact with the collision target; And 상기 임팩트 빔의 후면 길이방향 양측에 형성된 크래쉬 박스로 이루어지며,It consists of a crash box formed on both sides of the longitudinal length of the impact beam, 적어도 상기 크래쉬 박스는 상기 임팩트 빔을 구성하는 제 1 재질보다 연신율이 크고 강도가 낮은 제 2 재질을 더 추가하여 구성되는 것을 특징으로 하는 저속 충돌시 차체의 손상을 최소화하는 범퍼.At least the crash box is a bumper for minimizing damage to the vehicle body during low-speed collision, characterized in that further comprises a second material having a higher elongation and lower strength than the first material constituting the impact beam. 청구항 1에 있어서,The method according to claim 1, 상기 제 1 재질은 유리섬유매트 열가소성 복합재(Glass Mat Thermoplastic; GMT) 또는 장섬유 강화 복합재(Long Fiber-Reinforced Thermoplastic; LFT)이고, 상기 제 2 재질은 폴리프로필렌(PP)이나 플로이에틸렌(PE)인 것을 특징으로 하는 저속 충돌시 차체의 손상을 최소화하는 범퍼.The first material is Glass Mat Thermoplastic (GMT) or Long Fiber-Reinforced Thermoplastic (LFT), and the second material is Polypropylene (PP) or Plyethylene (PE). A bumper for minimizing damage to the body during low-speed collision, characterized in that. 청구항 1 또는 2에 있어서,The method according to claim 1 or 2, 상기 제 1 재질과 제 2 재질은 시트 형상으로 다수 매 적층되고 열 압착되는 것을 특징으로 하는 저속 충돌시 차체의 손상을 최소화하는 범퍼.The first material and the second material is a bumper for minimizing damage to the vehicle body during low-speed collision, characterized in that a plurality of sheets are stacked and thermally compressed in a sheet shape. 청구항 3에 있어서,The method according to claim 3, 상기 제 2 재질의 시트 두께를 조정하여 상기 크래쉬 박스 또는 임팩트 빔의 강도와 연신율을 조정하는 것을 특징으로 하는 저속 충돌시 차체의 손상을 최소화하는 범퍼.Bumper to minimize the damage to the vehicle body during low-speed collision, characterized in that by adjusting the sheet thickness of the second material to adjust the strength and elongation of the crash box or impact beam.
KR1020080108406A 2008-11-03 2008-11-03 Bumper capable for minimizing car body damage in low speed crash KR101031108B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101139243B1 (en) * 2010-11-10 2012-05-15 주식회사 성우하이텍 Automotive bumper beam unit
KR101464969B1 (en) * 2013-03-14 2014-11-25 주식회사 성우하이텍 Bumper beam unit for vehicles
CN105270300A (en) * 2014-06-18 2016-01-27 现代自动车株式会社 Bumper back beam for vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005502522A (en) 2001-09-12 2005-01-27 ゼネラル・エレクトリック・カンパニイ Energy absorbing member provided with a crash can
KR20050000046A (en) 2003-06-23 2005-01-03 이화선 Reinforcing Assembly for Automobile Bumper
KR101235140B1 (en) * 2006-05-19 2013-02-20 한화엘앤씨 주식회사 Impact beam for automobile bumper

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101139243B1 (en) * 2010-11-10 2012-05-15 주식회사 성우하이텍 Automotive bumper beam unit
KR101464969B1 (en) * 2013-03-14 2014-11-25 주식회사 성우하이텍 Bumper beam unit for vehicles
CN105270300A (en) * 2014-06-18 2016-01-27 现代自动车株式会社 Bumper back beam for vehicle

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