KR100402116B1 - A Structure of Automobile Cowl Cross Member - Google Patents
A Structure of Automobile Cowl Cross Member Download PDFInfo
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- KR100402116B1 KR100402116B1 KR10-2001-0031687A KR20010031687A KR100402116B1 KR 100402116 B1 KR100402116 B1 KR 100402116B1 KR 20010031687 A KR20010031687 A KR 20010031687A KR 100402116 B1 KR100402116 B1 KR 100402116B1
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- South Korea
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- cross member
- cowl cross
- weight
- present
- cowl
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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
- B62D25/081—Cowls
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/18—Propelling the vehicle
- B60Y2300/20—Reducing vibrations in the driveline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2304/00—Optimising design; Manufacturing; Testing
- B60Y2304/03—Reducing weight
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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 자동차의 카울크로스멤버 구조에 관한 것으로서, 그 목적은 필요이상으로 큰 강성을 나타내는 카울크로스멤버의 중량을 절감시킴으로서 강성대비 중량의 최적화를 실현하는 자동차의 카울크로스멤버 구조를 제공하는데 있다.The present invention relates to a cowl cross member structure of a motor vehicle, and an object thereof is to provide a cowl cross member structure of a motor vehicle that realizes optimization of weight to rigidity by reducing the weight of a cowl cross member exhibiting greater rigidity than necessary.
상기의 목적을 달성하기 위한 본 발명에 따른 자동차의 카울크로스멤버 구조는, 스티어링 휠 및 스티어링 칼럼이 설치되는 좌측멤버; 상기 좌측멤버에서 하방으로 연장되어 차체 바닥면과 연결되는 단일의 서포트 브래킷; 상기 좌측멤버에 용접을 통하여 연결되며 다수개의 절곡부를 갖는 우측멤버;로 구성되어 있다.The cowl cross member structure of the vehicle according to the present invention for achieving the above object, the left member is installed steering wheel and steering column; A single support bracket extending downward from the left member and connected to the bottom surface of the vehicle body; The right member is connected to the left member by welding and has a plurality of bent portions.
상술한 바와 같이 본 발명에 따른 자동차의 카울크로스멤버 구조에 의하면, 카울크로스멤버에서 하방으로 연장되어 차체 바닥면과 연결되는 서포트 브래킷을 하나로 축소하고 강성이 크게 필요치 않은 카울크로스멤버의 우측멤버의 축경을 축소함으로써 전체적인 중량이 크게 줄어들어 중량대비 강성 및 진동성능 효율이 크게 개선되는 특유의 효과가 있다.According to the cowl cross member structure of the automobile according to the present invention as described above, the diameter of the right member of the cowl cross member that extends downward from the cowl cross member to reduce the support bracket connected to the bottom of the body to one, and does not need much rigidity By reducing the overall weight is greatly reduced, there is a unique effect that the efficiency of stiffness and vibration performance to weight is greatly improved.
Description
본 발명은 자동차의 카울크로스멤버 구조에 관한 것으로서, 보다 상세하게는 스티어링 휠 및 스티어링 칼럼을 지지하고 또한 엔진에서 전달되는 진동을 흡수하기 위해 필수적으로 설치되는 카울크로스멤버에서 진동에 의한 변형에너지가 비교적 적게 분포되는 부위의 중량을 감소시킨 자동차의 카울크로스멤버 구조에 관한 것이다.The present invention relates to a structure of a cowl cross member of an automobile, and more particularly, deformation energy due to vibration is relatively high in a cowl cross member which is essentially installed to support the steering wheel and the steering column and to absorb the vibration transmitted from the engine. It relates to a cowl crossmember structure of a motor vehicle having reduced weight of less distributed parts.
일반적으로, 차량의 엔진룸과 차실내 사이의 경계 부위에는 스티어링 시스템(steering system)을 차체에 고정하기 위한 길이재의 보강바 역할을 하는 카울크로스멤버(cowl cross member)가 설치되는바, 이 카울크로스멤버는 스티어링 칼럼과 수직하게 구성되며 차체의 양측 프론트 필라에 고정되게 설치된다.In general, a cowl cross member is installed at the boundary between the engine room of the vehicle and the interior of the vehicle to serve as a reinforcing bar of the length member for fixing the steering system to the vehicle body. The member is constructed perpendicular to the steering column and is fixedly mounted to both front pillars of the body.
즉, 카울크로스멤버는 도 1에 도시된 바와 같이 스티어링 휠(1) 및 스티어링 칼럼(2)이 여기에 지지되게 하는 한편, 차량의 엔진(미도시)과 스티어링 휠(1)에서 전달되는 진동을 흡수하고 견딜 수 있도록 충분한 강도와 강성치를 갖는 직경 약 φ54의 리지드 바(rigid bar)가 설치된다.That is, the cowl cross member causes the steering wheel 1 and the steering column 2 to be supported thereto, as shown in FIG. 1, while the cowl cross member is configured to suppress vibrations transmitted from the engine (not shown) and the steering wheel 1 of the vehicle. A rigid bar of diameter φ54 is installed with sufficient strength and rigidity to absorb and tolerate.
또한, 상기 카울크로스멤버(10)의 하부에는 카울크로스멤버(10)의 자중을 견디고 엔진이나 스티어링 휠(1)로부터 전달된 진동을 차체 하부로 분산시키기 위해 두 개의 서포트 브래킷(11)이 차체 바닥면과 연결된다.In addition, the lower portion of the cowl cross member 10 has two support brackets 11 at the bottom of the body to withstand the weight of the cowl cross member 10 and to distribute vibrations transmitted from the engine or the steering wheel 1 to the lower part of the vehicle body. Connected with cotton
이와 같이 체결되는 카울크로스멤버는 그 구조 및 형상에 따라 엔진 진동 흡수율이 좌우되므로 강성시험을 통한 최적의 구조가 요구되고 있는 실정이다. 다시 말해서, 카울크로스멤버의 강성은 하중에 대한 변형저항 즉, 횡탄성 계수와 종탄성 계수로 평가되며 이러한 모든 탄성계수를 만족할 수 있도록 강한 구조가 요구되었던 것이다.As the cowl cross member fastened as described above, the engine vibration absorption rate depends on the structure and shape of the cowl cross member. In other words, the stiffness of the cowl cross member is evaluated by the deformation resistance against load, that is, the transverse modulus and the longitudinal modulus, and a strong structure is required to satisfy all these modulus.
그러나, 종래 카울크로스멤버는 진동성능의 향상과 이로 인한 멤버의 변형을 방지하기 위해 전체적으로 강한 구조로 이루어져 있어 강성테스트 결과 변형에너지가 그다지 크게 걸리지 않는 부위도 불필요하게 큰 강성을 나타내고 있어 중량이 크게 나가는 문제점이 있다.However, the conventional cowl cross member is composed of a strong structure as a whole to improve vibration performance and to prevent the deformation of the member due to this, and as a result of the stiffness test, the part that does not take much strain energy shows unnecessarily large stiffness. There is a problem.
본 발명은 상술한 바와 같은 문제점을 해결하기 위하여 제안된 것으로서, 그 목적은 필요이상으로 큰 강성을 나타내는 카울크로스멤버의 중량을 절감시킴으로서 강성대비 중량의 최적화를 실현하는 자동차의 카울크로스멤버 구조를 제공하는데 있다.The present invention has been proposed to solve the problems described above, the object of which is to provide a cowl cross member structure of the vehicle to realize the optimization of weight to rigidity by reducing the weight of the cowl cross member exhibiting greater rigidity than necessary It is.
도 1은 종래 카울크로스멤버를 나타낸 사시도,1 is a perspective view showing a conventional cowl cross member,
도 2는 본 발명에 따른 카울크로스멤버를 나타낸 사시도.2 is a perspective view showing a 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
20 : 카울크로스멤버 20a : 좌측멤버20: cowl cross member 20a: left member
20b : 우측멤버 21 : 서포트 브래킷20b: right member 21: support bracket
22 : 용접부 23 : 절곡부22: welded portion 23: bent portion
상기의 목적을 달성하기 위한 본 발명에 따른 자동차의 카울크로스멤버 구조는, 스티어링 휠 및 스티어링 칼럼이 설치되는 좌측멤버; 상기 좌측멤버에서 하방으로 연장되어 차체 바닥면과 연결되는 단일의 서포트 브래킷; 상기 좌측멤버에 용접을 통하여 연결되며 다수개의 절곡부를 갖는 우측멤버;로 구성되어 있다.The cowl cross member structure of the vehicle according to the present invention for achieving the above object, the left member is installed steering wheel and steering column; A single support bracket extending downward from the left member and connected to the bottom surface of the vehicle body; The right member is connected to the left member by welding and has a plurality of bent portions.
이하, 본 발명의 특징적 구성을 첨부된 도면을 참조하여 보다 상세하게 설명한다.Hereinafter, the characteristic configuration of the present invention will be described in more detail with reference to the accompanying drawings.
도 2는 본 발명에 따른 자동차의 카울크로스멤버의 구조를 도시한 도면으로서, 여기서 살펴보면 스티어링 휠(1) 및 스티어링 칼럼(2)을 통해 엔진의 진동이 전달되는 카울크로스멤버의 좌측멤버(20a)는 상기의 전달된 진동을 흡수하고 그 진동에 충분히 견딜 수 있도록 종래와 동일한 직경으로 되어 있다.2 is a view illustrating a structure of a cowl cross member of a vehicle according to the present invention, in which the left member 20a of the cowl cross member through which the vibration of the engine is transmitted through the steering wheel 1 and the steering column 2 is illustrated. Is the same diameter as the conventional one so as to absorb the transmitted vibration and to withstand the vibration sufficiently.
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 하며, 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, and the target frequency of the cowl cross member is usually set to about 33 Hz.
따라서, 비교적 큰 진동이 전달되는 스티어링 휠(1) 및 스티어링 칼럼(2)의 설치부위인 좌측멤버(20a)는 종래와 동일하게 그 직경을 φ54로 설정하여 이 부위에 전달되는 진동을 충분히 흡수하고 견딜수 있도록 한다.Therefore, the left member 20a, which is the installation portion of the steering wheel 1 and the steering column 2, to which relatively large vibrations are transmitted, sets its diameter to φ 54 as in the prior art to sufficiently absorb vibrations transmitted to this site. Make it bearable.
그러나, 상기 스티어링 휠(1) 및 스티어링 칼럼(2)이 설치되는 부위를 제외한 카울크로스멤버의 다른 부위는 비교적 변형에너지가 적게 걸림에도 불구하고 전체적으로 큰 강성 구조를 이루고 있어서, 불필요하게 큰 강성을 띠고 있는 부위의 구조를 개량할 필요가 있다.However, the other parts of the cowl cross member except for the parts in which the steering wheel 1 and the steering column 2 are installed form a large rigid structure as a whole despite relatively low strain energy, and thus have unnecessarily large rigidity. It is necessary to improve the structure of the site.
먼저, 상기 좌측멤버(20a)에서 하방으로 연장되어 차체 바닥면과 연결되는 서포트 브래킷(21)이 하나 설치되도록 하여 상기 카울크로스멤버(20)의 자중을 부담하게 하고 엔진에서 전달되는 진동의 일부를 차체 바닥면으로 분산시킨다.First, the support member 21 is extended downward from the left member 20a to be connected to the bottom of the vehicle body so as to bear the weight of the cowl cross member 20 and a part of the vibration transmitted from the engine. Disperse to the bottom of the body.
또한, 비교적 진동에 의한 변형하중이 크게 걸리지 않는 상기 카울크로스멤버(20)의 우측멤버(20b)의 축 직경을 축소하여 카울크로스멤버(20)의 좌측멤버(20a)와 CO2 용접(22)을 통해 연결되도록 한다.In addition, the shaft diameter of the right member 20b of the cowl cross member 20, which is relatively hard to be deformed by vibration, is reduced to reduce the left member 20a of the cowl cross member 20 and the CO 2 welding 22. To be connected.
이때, 상기 카울크로스멤버(20)의 좌측멤버(20a)에 용접을 통해 연결되는 우측멤버의 축경은 약 φ32정도가 바람직하다.At this time, the shaft diameter of the right member connected to the left member 20a of the cowl cross member 20 by welding is preferably about φ32.
또한, 상기 카울크로스멤버(20)의 우측멤버(20b)에는 다수개의 절곡부(23)가 형성되도록 하여 카울크로스멤버(20)에 길이방향으로 전달되는 변형에너지가 효과적으로 흡수되도록 하였다.In addition, the right member 20b of the cowl cross member 20 allows a plurality of bent portions 23 to be formed to effectively absorb the strain energy transmitted to the cowl cross member 20 in the longitudinal direction.
이상의 구성을 갖는 본 발명에 따른 카울크로스멤버 구조에서 카울크로스멤버의 전체 중량 중 1.3kg이 감소되었고 진동성능대비 실험에서 종래 카울크로스멤버의 고유진동수가 34Hz이던 것이 본 발명에 의하면 33.4Hz로 감소되기는 하였으나 목표 진동수인 33Hz를 만족하는 결과를 보였다.In the cowl cross member structure according to the present invention having the above configuration, 1.3 kg of the total weight of the cowl cross member was reduced, and the natural frequency of the conventional cowl cross member was 34 Hz according to the present invention in comparison with the vibration performance. However, the result satisfies the target frequency of 33 Hz.
상술한 바와 같이 본 발명에 따른 자동차의 카울크로스멤버 구조에 의하면, 카울크로스멤버에서 하방으로 연장되어 차체 바닥면과 연결되는 서포트 브래킷을 하나로 축소하고 강성이 크게 필요치 않은 카울크로스멤버의 우측멤버의 축경을 축소함으로써 전체적인 중량이 크게 줄어들어 중량대비 강성 및 진동성능 효율이 크게 개선되는 특유의 효과가 있다.According to the cowl cross member structure of the automobile according to the present invention as described above, the diameter of the right member of the cowl cross member that extends downward from the cowl cross member to reduce the support bracket connected to the bottom of the body to one, and does not need much rigidity By reducing the overall weight is greatly reduced, there is a unique effect that the efficiency of stiffness and vibration performance to weight is greatly improved.
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KR10-2001-0031687A KR100402116B1 (en) | 2001-06-07 | 2001-06-07 | A Structure of Automobile Cowl Cross Member |
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KR10-2001-0031687A KR100402116B1 (en) | 2001-06-07 | 2001-06-07 | A Structure of Automobile Cowl Cross Member |
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KR101039675B1 (en) * | 2004-11-25 | 2011-06-09 | 현대자동차주식회사 | Tilting headrest for vehicle |
KR100785200B1 (en) * | 2005-12-16 | 2007-12-11 | 현대모비스 주식회사 | Cowl cross member |
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2001
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