KR100471469B1 - Cowl cross member mounting bracket for low-vibration of automobile steering-wheel - Google Patents

Cowl cross member mounting bracket for low-vibration of automobile steering-wheel Download PDF

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Publication number
KR100471469B1
KR100471469B1 KR10-2002-0037971A KR20020037971A KR100471469B1 KR 100471469 B1 KR100471469 B1 KR 100471469B1 KR 20020037971 A KR20020037971 A KR 20020037971A KR 100471469 B1 KR100471469 B1 KR 100471469B1
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KR
South Korea
Prior art keywords
cross member
cowl cross
mounting bracket
vibration
steering wheel
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KR10-2002-0037971A
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Korean (ko)
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KR20040003307A (en
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윤경렬
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현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/14—Dashboards as superstructure sub-units
    • B62D25/145—Dashboards as superstructure sub-units having a crossbeam incorporated therein
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/081—Cowls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/22—Arrangements for reducing or eliminating reaction, e.g. vibration, from parts, e.g. wheels, of the steering system

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

본 발명은 스티어링 휠이 장착되는 카울크로스멤버의 마운팅브래킷에 관한 것으로서, 보다 상세하게는 스티어링 휠이 설치되는 카울크로스멤버가 차량의 아이들 상태에서 엔진 진동에 의하여 공진되지 않도록 카울크로스멤버의 고유진동수를 바꾼 자동차용 스티어링 휠의 진동저감을 위한 카울크로스멤버 마운팅브래킷에 관한 것이다.The present invention relates to a mounting bracket of a cowl cross member on which a steering wheel is mounted. More specifically, the cowl cross member on which the steering wheel is mounted is designed so that the natural frequency of the cowl cross member is not resonated by engine vibration in an idle state of the vehicle. The present invention relates to a cowl cross member mounting bracket for vibration reduction of a changed steering wheel for automobiles.

본 발명은, 차량용 스티어링 휠이 장착되는 카울크로스멤버가 "ㄱ"자형의 절곡면을 갖는 차체에 고정되도록 상기 카울크로스멤버의 양단에 설치되는 카울크로스멤버의 마운팅브래킷에 있어서, 차체와 접촉되는 상기 마운팅브래킷의 외면에는 카울크로스멤버의 진동을 흡수하는 연질의 보강부재가 설치되고, 이 보강부재는 상기 차체의 두 면과 인접하도록 "ㄱ"자 형상으로 절곡된다.The present invention, in the mounting bracket of the cowl cross member is installed on both ends of the cowl cross member so that the cowl cross member on which the steering wheel for the vehicle is mounted is fixed to the vehicle body having a "b" shaped bending surface, The outer surface of the mounting bracket is provided with a soft reinforcing member for absorbing the vibration of the cowl cross member, the reinforcing member is bent in a "b" shape so as to be adjacent to the two surfaces of the vehicle body.

Description

자동차용 스티어링 휠의 진동저감을 위한 카울크로스멤버 마운팅브래킷{Cowl cross member mounting bracket for low-vibration of automobile steering-wheel}Cowl cross member mounting bracket for low-vibration of automobile steering-wheel}

본 발명은 스티어링 휠이 장착되는 카울크로스멤버의 마운팅브래킷에 관한 것으로서, 보다 상세하게는 스티어링 휠이 설치되는 카울크로스멤버가 차량의 아이들 상태에서 엔진 진동에 의하여 공진되지 않도록 카울크로스멤버의 고유진동수를 바꾼 자동차용 스티어링 휠의 진동저감을 위한 카울크로스멤버 마운팅브래킷에 관한 것이다.The present invention relates to a mounting bracket of a cowl cross member on which a steering wheel is mounted. More specifically, the cowl cross member on which the steering wheel is mounted is designed so that the natural frequency of the cowl cross member is not resonated by engine vibration in an idle state of the vehicle. The present invention relates to a cowl cross member mounting bracket for vibration reduction of a changed steering wheel for automobiles.

일반적으로, 자동차의 차실내 전방에는 스티어링 휠 및 스티어링 칼럼과 같은 스티어링 시스템(steering system)이 차체에 고정되도록 차체 길이방향에 대하여 직각으로 수평하게 배치되는 카울크로스멤버(cowl cross member)가 설치되는바, 이 카울크로스멤버는 스티어링 칼럼과 수직하게 구성되며 차체의 양측 프런트필라에 고정되게 설치된다.In general, a cowl cross member is installed at the front of the vehicle interior and is arranged horizontally at right angles to the vehicle body longitudinal direction so that a steering system such as a steering wheel and a steering column is fixed to the vehicle body. The cowl cross member is constructed perpendicular to the steering column and is fixed to both front pillars of the body.

도1 및 도2에 도시된 바와 같이 스티어링 휠(1)이 설치된 스티어링 칼럼(2)은 스티어링 브래킷(3)을 매개로 카울크로스멤버(4)에 지지되는데, 상기 카울크로스멤버(4)는 엔진(미도시)과 스티어링 휠(1)에서 전달되는 진동을 흡수하고 견딜 수 있도록 충분한 강도와 강성치를 갖는 직경 약 Φ54mm의 리지드 바(rigid bar)로서, 차체 길이방향에 대하여 직각으로 수평하게 차량의 프런트필라(A) 측에 설치된다.As shown in FIGS. 1 and 2, the steering column 2 provided with the steering wheel 1 is supported by the cowl cross member 4 via the steering bracket 3, and the cowl cross member 4 is an engine. (Not shown) and a rigid bar of approximately Φ 54 mm in diameter having sufficient strength and rigidity to absorb and tolerate vibrations transmitted from the steering wheel 1, and to the front of the vehicle at right angles to the longitudinal direction of the vehicle body. It is installed in the pillar A side.

또한, 상기 카울크로스멤버(4)의 중앙부에는 카울크로스멤버(4)의 자중을 견디고 엔진이나 스티어링 휠(1)로부터 전달된 진동을 차체 하부로 분산시키기 위하여 두 개의 센터서포트브래킷(5)을 매개로 차체 바닥면(6)과 연결된다.In addition, at the center of the cowl cross member 4, two center support brackets 5 are used to withstand the weight of the cowl cross member 4 and to distribute vibrations transmitted from the engine or the steering wheel 1 to the lower part of the vehicle body. Is connected to the vehicle body bottom (6).

한편, 상기 카울크로스멤버(4)의 양끝단에는 카울크로스멤버(4)가 차체의 프론트필라(A)에 마운팅되도록 하는 카울크로스멤버 마운팅브래킷(10)이 설치된다.Meanwhile, cowl cross member mounting brackets 10 are installed at both ends of the cowl cross member 4 so that the cowl cross member 4 is mounted on the front pillar A of the vehicle body.

즉, 카울크로스멤버(4)는 그 구조 및 형상에 따라 엔진 진동 흡수율이 좌우되므로 강성시험을 통한 최적의 구조가 요구된다. 다시 말해서, 카울크로스멤버(4)의 강성은 하중에 대한 변형저항 즉, 횡탄성 계수와 종탄성 계수로 평가되며 이러한 모든 탄성계수를 만족할 수 있도록 강한 구조가 요구되었던 것이다.That is, the cowl cross member 4 is the optimum structure through the stiffness test because the engine vibration absorption rate depends on its structure and shape. In other words, the stiffness of the cowl cross member 4 is evaluated by the deformation resistance to the load, that is, the transverse elastic modulus and the longitudinal modulus, and a strong structure is required to satisfy all these elastic modulus.

그러나, 상술한 바와 같은 종래의 카울크로스멤버는 그 고유진동수가 엔진 아이들 상태의 엔진 진동수와 거의 같아서 차량의 공회전시 엔진과 카울크로스멤버 간의 공진이 발생되므로 스티어링 휠이 매우 심하게 떨리는 문제점이 발생한다.However, in the conventional cowl cross member as described above, the natural frequency of the cowl cross member is almost the same as the engine frequency of the engine idle state, and thus, the steering wheel is very vibrated because resonance occurs between the engine and the cowl cross member during idling of the vehicle.

본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 제안된 것으로서, 그 목적은 엔진 및 스티어링 시스템을 구조적으로 크게 변경시키지 않고 카울크로스멤버의 고유진동수만을 엔진 아이들 진동수와 다르게 변경함으로써 차량 공회전시에 스티어링 휠이 심하게 떨리는 현상을 개선하는데 있다.The present invention has been proposed to solve the problems described above, and its object is to change the natural frequency of the cowl cross member differently from the engine idle frequency without changing the engine and the steering system structurally, so that the steering wheel is idle when the vehicle is idle. This is to improve the severe shaking.

상기의 목적을 달성하기 위한 본 발명은, 차량용 스티어링 휠이 장착되는 카울크로스멤버가 "ㄱ"자형의 절곡면을 갖는 차체에 고정되도록 상기 카울크로스멤버의 양단에 설치되는 카울크로스멤버의 마운팅브래킷에 있어서, 차체와 접촉되는 상기 마운팅브래킷의 외면에는 카울크로스멤버의 진동을 흡수하는 연질의 보강부재가 설치되고, 이 보강부재는 상기 차체의 두 면과 인접하도록 "ㄱ"자 형상으로 절곡된다.The present invention for achieving the above object, on the mounting bracket of the cowl cross member is installed on both ends of the cowl cross member so that the cowl cross member on which the steering wheel for the vehicle is mounted is fixed to a vehicle body having a "b" shaped bent surface. In this case, a soft reinforcing member for absorbing vibration of the cowl cross member is installed on an outer surface of the mounting bracket in contact with the vehicle body, and the reinforcing member is bent in a "-" shape to be adjacent to two surfaces of the vehicle body.

이하, 본 발명의 특징적인 기술구성을 첨부된 도면에 의거하여 설명한다.DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a technical configuration of the present invention will be described based on the accompanying drawings.

도3은 본 발명에 따른 카울크로스멤버의 마운팅브래킷을 나타낸 사시도이다.3 is a perspective view showing a mounting bracket of a cowl cross member according to the present invention.

통상적으로 카울크로스멤버는 카울크로스멤버의 고유진동수가 엔진에서 발생되는 진동수와 일치되지 않도록 그 직경이 설정되어야 하는데, 이는 카울크로스멤버의 진동수가 엔진 진동수와 일치하게 되면 공진현상이 발생되어 카울크로스멤버가 매우 큰 진폭으로 진동되어 파괴되기 때문이다.In general, the cowl cross member has to have its diameter set so that the natural frequency of the cowl cross member does not match the frequency generated by the engine. When the cowl cross member's frequency matches the engine's frequency, a resonance phenomenon occurs and the cowl cross member Is vibrated and destroyed with a very large amplitude.

보통의 경우, 엔진의 고유진동수는 약 22Hz 정도로서 카울크로스멤버는 그 직경을 적절히 고려하여 엔진의 진동수와 일치되지 않도록 설계되어야 하는데, 통상 카울크로스멤버의 목표 진동수는 약 33Hz가 되도록 설정된다.In general, the natural frequency of the engine is about 22 Hz, and the cowl cross member should be designed so as not to match the frequency of the engine, considering the diameter appropriately. Usually, the target frequency of the cowl cross member is set to be about 33 Hz.

그러나 카울크로스멤버의 축 직경을 무작정 크게 설계하여 카울크로스멤버의 고유진동수를 변화시키는 것은 차체의 전체중량이 증가되는 요인이 되므로 바람직하지 않고, 엔진 아이들 상태의 진동수를 바꾸기 위해서는 엔진의 초기 설계를 다시 하여야 함으로 그 비용 및 수고가 만만치 않다.However, it is not desirable to change the natural frequency of the cowl cross member by designing the shaft diameter of the cowl cross member randomly, since it is a factor to increase the overall weight of the cowl cross member, and it is not desirable to change the frequency of the engine idle state. The cost and labor are formidable.

즉, 가장 용이한 방법으로 카울크로스멤버의 고유진동수를 바꾸기 위해서는 카울크로스멤버의 양단과 차체를 서로 결합시키는 마운팅브래킷의 구성을 변경시킴으로써 차체에서 카울크로스멤버로 전달되는 진동을 조금이나마 줄일 수 있다.That is, in order to change the natural frequency of the cowl cross member in the easiest way, the vibration transmitted from the car body to the cowl cross member can be slightly reduced by changing the configuration of the mounting bracket that couples both ends of the cowl cross member and the body.

따라서, 본 발명은 카울크로스멤버(4)의 양단에 위치되어 상기 카울크로스멤버(4)를 차체의 프론트필라(A)에 마운팅시키는 마운팅브래킷(20)에 차체 또는 엔진으로부터 전달된 진동을 흡수하는 보강부재(21)가 설치되도록 한 것이 특징이다.Therefore, the present invention is located on both ends of the cowl cross member (4) to absorb the vibration transmitted from the vehicle body or engine to the mounting bracket 20 for mounting the cowl cross member (4) to the front pillar (A) of the vehicle body It is characterized in that the reinforcing member 21 is installed.

즉, 엔진이나 카울크로스멤버 자체의 설계를 변경시키지 않고도 마운팅브래킷(20)에 별도의 보강부재(21)를 설치함으로써 카울크로스멤버(4)의 고유진동수를 바꿀 수 있는 것이다.That is, the natural frequency of the cowl cross member 4 can be changed by installing a separate reinforcing member 21 on the mounting bracket 20 without changing the design of the engine or the cowl cross member itself.

여기서, 상기 보강부재(21)는 보다 넓은 차체 면과 접촉될 수 있도록 그 형상이 고려되어야 한다. 즉, 카울크로스멤버(4)의 양단은 "ㄱ"자 형의 절곡면을 갖는 차체에 결합되고, 이에 의해 상기 마운팅브래킷(20) 또한 상기 차체와 마찬가지로 "ㄱ"자 형상을 가진다. 따라서, 상기 보강부재(21) 역시 차체의 두 면과 인접하도록 "ㄱ"자 형상으로 절곡 형성되는 것이 바람직하다. 왜냐하면, 차체와 가장 넓게 인접하는 것이 진동을 저감시키는데 가장 효과적이기 때문이다. 또한 도3에서 보는 바와 같이 상기 보강부재(21)는 마운팅브래킷(20)의 외면에 설치되며, 이에 의해 보강부재(21)는 간편하게 교체될 수 있다.Here, the shape of the reinforcing member 21 is to be considered so that it can be in contact with a wider body surface. That is, both ends of the cowl cross member 4 are coupled to a vehicle body having a bent surface of the "a" shape, whereby the mounting bracket 20 also has a "a" shape like the vehicle body. Therefore, the reinforcing member 21 is also preferably formed to be bent in a "b" shape to be adjacent to both surfaces of the vehicle body. This is because the closest proximity to the vehicle body is most effective for reducing vibration. In addition, as shown in Figure 3, the reinforcing member 21 is installed on the outer surface of the mounting bracket 20, whereby the reinforcing member 21 can be easily replaced.

또한, 상기 보강부재는 두께를 갖는 금속패널(두께:2mm, 중량:13g)로 이루어지는 것도 좋으나, 보다 바람직하게는 진동흡수 능력이 우수하고 중량이 비교적 가벼운 고무와 같은 연질부재로 이루어지는 것이 좋다. In addition, the reinforcing member may be made of a metal panel having a thickness (thickness: 2 mm, weight: 13 g), but more preferably, may be made of a soft member such as rubber having excellent vibration absorption capability and relatively light weight.

상기 보강부재(21)가 설치된 상기 카울크로스멤버 마운팅브래킷(20)으로 상기 카울크로스멤버(4)를 차체에 마운팅하면 실제로 상기 보강부재(21)가 엔진 아이들시의 진동을 흡수하여 카울크로스멤버(4)로 전달되는 진동이 감소되므로 카울크로스멤버(4)에 장착되는 스티어링 휠(1)의 진동, 즉 떨림이 크게 줄어들게 된다.When the cowl cross member 4 is mounted on the vehicle body with the cowl cross member mounting bracket 20 in which the reinforcing member 21 is installed, the reinforcing member 21 actually absorbs vibration during engine idling and thus the cowl cross member ( Since the vibration transmitted to 4) is reduced, vibration of the steering wheel 1 mounted on the cowl cross member 4, that is, tremor, is greatly reduced.

상술한 바와 같이 본 발명에 따른 자동차용 스트어링 휠의 진동저감을 위한 카울크로스멤버 마운팅브래킷에 의하면, 카울크로스멤버의 구조를 크게 변경시키지 않고 마운팅브래킷에 진동흡수가 가능한 보강부재만을 설치함으로써 카울크로스멤버에 장착된 스티어링 휠의 떨림이 크게 줄어드는 특유의 효과가 있다.As described above, according to the cowl cross member mounting bracket for vibration reduction of the vehicle steering wheel according to the present invention, the cowl cross is installed by only installing the reinforcing member capable of absorbing vibration in the mounting bracket without significantly changing the structure of the cowl cross member. There is a distinctive effect that the vibration of the steering wheel mounted on the member is greatly reduced.

도1은 종래 카울크로스멤버 및 그 마운팅브래킷을 나타낸 사시도,1 is a perspective view showing a conventional cowl cross member and its mounting bracket,

도2는 카울크로스멤버의 설치상태를 나타낸 사시도,2 is a perspective view showing an installation state of the cowl cross member;

도3은 본 발명에 따른 카울크로스멤버의 마운팅브래킷을 나타낸 사시도.Figure 3 is a perspective view showing a mounting bracket of the cowl cross member according to the present invention.

※도면의 주요부분에 대한 부호의 설명※※ Explanation of symbols about main part of drawing ※

1 : 스티어링 휠 2 : 스티어링 칼럼1: steering wheel 2: steering column

3 : 스티어링 브래킷 4 : 카울크로스멤버3: steering bracket 4: cowl cross member

5 : 센터서포트브래킷 6 : 차체 바닥면5: center support bracket 6: body bottom

10 : 종래 마운팅브래킷 20 : 본 발명의 마운팅브래킷10: conventional mounting bracket 20: mounting bracket of the present invention

21 : 보강부재 A : 프런트필라21: reinforcing member A: front pillar

Claims (3)

차량용 스티어링 휠(1)이 장착되는 카울크로스멤버(4)가 "ㄱ"자형의 절곡면을 갖는 차체에 고정되도록 상기 카울크로스멤버의 양단에 설치되는 카울크로스멤버의 마운팅브래킷에 있어서, In the mounting bracket of the cowl cross member which is installed at both ends of the cowl cross member so that the cowl cross member 4 on which the vehicle steering wheel 1 is mounted is fixed to a vehicle body having a bent surface of the "a" shape, 차체와 접촉되는 상기 마운팅브래킷(20)의 외면에는 카울크로스멤버(4)의 진동을 흡수하는 연질의 보강부재(21)가 설치되고, 이 보강부재(21)는 상기 차체의 두 면과 인접하도록 "ㄱ"자 형상으로 절곡된 것을 특징으로 하는 자동차용 스티어링 휠의 진동저감을 위한 카울크로스멤버 마운팅브래킷.The outer surface of the mounting bracket 20 in contact with the vehicle body is provided with a soft reinforcement member 21 that absorbs the vibration of the cowl cross member 4, so that the reinforcement member 21 is adjacent to two surfaces of the vehicle body. A cowl cross member mounting bracket for vibration reduction of an automobile steering wheel, which is bent in a "-" shape. 삭제delete 삭제delete
KR10-2002-0037971A 2002-07-02 2002-07-02 Cowl cross member mounting bracket for low-vibration of automobile steering-wheel KR100471469B1 (en)

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Application Number Priority Date Filing Date Title
KR10-2002-0037971A KR100471469B1 (en) 2002-07-02 2002-07-02 Cowl cross member mounting bracket for low-vibration of automobile steering-wheel

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KR10-2002-0037971A KR100471469B1 (en) 2002-07-02 2002-07-02 Cowl cross member mounting bracket for low-vibration of automobile steering-wheel

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KR100471469B1 true KR100471469B1 (en) 2005-03-08

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08183462A (en) * 1995-01-04 1996-07-16 Futaba Sangyo Kk Steering support
KR970017622U (en) * 1995-10-09 1997-05-23 Cowl Cross Member Structure
KR19980032999U (en) * 1996-12-05 1998-09-05 박병재 Cowl cross member mounting structure of car
KR0139594Y1 (en) * 1996-08-17 1999-04-01 박병재 A mounting means of cowl cross bar of an automobile
JP2000238665A (en) * 1999-02-19 2000-09-05 Honda Motor Co Ltd Steering supporting device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08183462A (en) * 1995-01-04 1996-07-16 Futaba Sangyo Kk Steering support
KR970017622U (en) * 1995-10-09 1997-05-23 Cowl Cross Member Structure
KR0139594Y1 (en) * 1996-08-17 1999-04-01 박병재 A mounting means of cowl cross bar of an automobile
KR19980032999U (en) * 1996-12-05 1998-09-05 박병재 Cowl cross member mounting structure of car
JP2000238665A (en) * 1999-02-19 2000-09-05 Honda Motor Co Ltd Steering supporting device

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