KR20020016978A - Steering device for vehicle - Google Patents

Steering device for vehicle Download PDF

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Publication number
KR20020016978A
KR20020016978A KR1020000050005A KR20000050005A KR20020016978A KR 20020016978 A KR20020016978 A KR 20020016978A KR 1020000050005 A KR1020000050005 A KR 1020000050005A KR 20000050005 A KR20000050005 A KR 20000050005A KR 20020016978 A KR20020016978 A KR 20020016978A
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KR
South Korea
Prior art keywords
rack
pinion
bar
rotary valve
vehicle
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KR1020000050005A
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Korean (ko)
Inventor
류준형
Original Assignee
밍 루
주식회사 만도
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Application filed by 밍 루, 주식회사 만도 filed Critical 밍 루
Priority to KR1020000050005A priority Critical patent/KR20020016978A/en
Publication of KR20020016978A publication Critical patent/KR20020016978A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D3/00Steering gears
    • B62D3/02Steering gears mechanical
    • B62D3/12Steering gears mechanical of rack-and-pinion type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60YINDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2300/00Purposes or special features of road vehicle drive control systems
    • B60Y2300/18Propelling the vehicle
    • B60Y2300/20Reducing vibrations in the driveline
    • B60Y2300/207Reducing vibrations in the driveline related to drive shaft torsion, e.g. driveline oscillations

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: A steering system of a vehicle is provided to prevent damage or wear of a pinion and a rack by uniformly gearing the pinion and the rack and to prevent a rack bar from rotating. CONSTITUTION: A steering system of a vehicle comprises a rotary valve(10) controlling oil supplied to an oil pump; a rack housing(20) interlocked with the rotary valve; a pinion bar(30) installed on the rotary valve by being connected to a steering handle; a pinion(31) formed on a lower portion of the pinion bar; a rack bar(40) formed as a metal bar corresponding to the pinion; a rack(41) arranged on the middle of the lack bar; a tie rod(50) moved by the rack bar by being connected to the steering wheel; and a piston(60) sliding by being attached to an inner face of the lack housing. The piston is operated by hydraulic pressure supplied through the rotary valve by being mounted between the hydraulic pipes connected to the rotary valve.

Description

차량용 조향장치{STEERING DEVICE FOR VEHICLE}Vehicle steering device {STEERING DEVICE FOR VEHICLE}

본 발명은 차량용 조향장치에 관한 것으로서, 더욱 상세하게는 랙하우징의 내부에 설치되는 랙바의 회전이 방지되는 차량용 조향장치에 관한 것이다.The present invention relates to a vehicle steering apparatus, and more particularly, to a vehicle steering apparatus that prevents the rotation of the rack bar installed inside the rack housing.

일반적으로 조향장치는 운전자에 의해 조향륜을 움직일 수 있도록 운전석과 조향륜의 사이에 마련되는 것으로서, 운전석의 조향핸들 하측에 마련되는 조향축과, 이 조향축과 연결되는 로터리밸브, 그리고 로터리밸브의 동작에 따라 조향륜을 동작시킬 수 있도록 좌,우 양측으로 연장되는 랙바를 구비하여 마련된다.In general, the steering device is provided between the driver's seat and the steering wheel so that the steering wheel can be moved by the driver, and the steering shaft provided under the steering wheel of the driver's seat, the rotary valve connected to the steering shaft, and the rotary valve It is provided with a rack bar extending to both left and right sides to operate the steering wheel according to the operation.

도 1은 이러한 종래의 랙바가 설치된 상태를 보인 도면이다. 이에 도시된 바와 같이, 로터리밸브(1)는 랙하우징(2)과 직교에 가깝도록 교차되어 결합형성되는 것으로서, 외부의 오일펌프(미도시)로부터 랙하우징(2)에 전달되는 오일을 조절할 수 있도록 마련된다.1 is a view showing a state in which the conventional rack bar is installed. As shown in the drawing, the rotary valve 1 is formed to cross the coupling close to the orthogonal rack housing 2, it is possible to adjust the oil delivered to the rack housing (2) from an external oil pump (not shown) To be arranged.

이 로터리밸브(1)의 내부에는 상측으로 연장 형성되는 피니언바(3)가 설치되는데, 이 피니언바(3)는 그 상측이 조향축을 통해 조향핸들(미도시)과 연결되고, 그 하측에는 피니언(4)이 형성된다.Inside the rotary valve 1, a pinion bar 3 extending upward is formed. The pinion bar 3 is connected to a steering wheel (not shown), the upper side of which is connected to a steering wheel (not shown) through a steering shaft. (4) is formed.

그리고 상,하방향으로 길게 형성된 로터리밸브(1)와 그 내부가 연통되도록 마련되는 랙하우징(2)은 좌,우방향으로 길게 형성되며 그 내부에는 피니언바(3)의 하측에 마련된 피니언(4)과 맞물릴 수 있도록 랙(6)이 형성된 랙바(5)가 설치된다.And the rotary housing (1) formed long in the up, down direction and the rack housing (2) is provided so that the inside is in communication with each other is formed long in the left, right direction and the pinion (4) provided on the lower side of the pinion bar (3) inside Rack bar (5) is formed to be engaged with the rack 6 is installed.

이 랙바(5)는 원통으로 마련되는 금속의 장봉으로서 랙(6)이 설치되는 부분은 피니언(4)과 마주할 수 있도록 일부분이 면으로 형성되고, 이 면에 랙(6)이 가공되어 피니언(4)과 맞물리게되는 것이다.The rack bar 5 is a cylindrical rod of metal provided in a cylindrical shape, and the part where the rack 6 is installed is partially formed to face the pinion 4, and the rack 6 is machined on this surface. Will be interlocked with (4).

또, 랙(6)의 배면은 랙바(5)의 전체적인 형상과 같이 원형으로 마련되는데, 이 부분에는 랙(6)이 피니언(4)과 맞물릴 수 있도록 랙(6) 배면을 피니언(4)측으로 지지하는 지지부재(7)가 마련된다.In addition, the rear surface of the rack 6 is provided in a circular shape, such as the overall shape of the rack bar (5), the portion of the rack (6) so that the rack 6 is engaged with the pinion (4) pinion (4) A supporting member 7 supporting to the side is provided.

이 지지부재(7)는 랙(6) 배면과 밀착되어 랙(6)을 지지함과 동시에 랙(6)이 좌,우측으로 이동될 수 있도록 반원형으로 함몰형성되고, 이 지지부재(7)의 배면에는 일측은 고정되고 타측은 지지부재(7)를 탄성지지하는 탄성부재(8)가 마련된다.The supporting member 7 is in close contact with the rear surface of the rack 6 to support the rack 6 and is recessed in a semicircular shape so that the rack 6 can be moved left and right. One side is fixed to the back and the other side is provided with an elastic member 8 for elastically supporting the support member (7).

이로써 탄성부재(8)에 의해 지지부재(7)가 랙(6)의 배면을 피니언(4)측으로 탄성지지하여 랙(6)과 피니언(4)과 서로 이물림되는 것이다.As a result, the support member 7 is elastically supported by the elastic member 8 to the pinion 4 side of the rack 6 so as to be separated from the rack 6 and the pinion 4.

그러나 이와 같이 구성된 종래의 차량용 조향장치는, 노면이 불안정하여 차량이 기울어질 때 랙바에 회전방향으로 하중이 전달되는 경우가 생긴다.However, in the conventional vehicle steering apparatus configured as described above, a load may be transmitted to the rack bar in a rotational direction when the vehicle is inclined because the road surface is unstable.

이로써, 피니언과 마주하도록 설치되어 이물림되는 랙이 피니언과 기울어져 이물림되고, 이러한 부분적인 이물림으로 인해 랙의 일부분이 손상되는 문제점이 있었다.As a result, the rack which is installed so as to face the pinion and is being bitten by the pinion is inclined and is bitten, and a part of the rack is damaged due to this partial biting.

본 발명은 이와 같은 종래의 문제점을 해결하기 위한 것으로서, 본 발명의 목적은 피니언과 랙이 균일하게 이물림되어 랙과 피니언의 마모 및 손상을 방지할 수 있도록 랙바의 회전이 방지되는 차량용 조향장치를 제공하는 것이다.The present invention is to solve such a conventional problem, an object of the present invention is to steer the rack pinion and the rack evenly to prevent the rotation of the rack bar to prevent the wear and damage of the rack and pinion vehicle steering device To provide.

도 1은 종래의 랙바가 설치된 상태를 보인 단면도이다.1 is a cross-sectional view showing a state where a conventional rack bar is installed.

도 2는 본 발명에 따른 랙하우징의 내부를 보인 단면도이다.2 is a cross-sectional view showing the interior of the rack housing according to the present invention.

도 3은 도 2의 A-A선을 보인 단면도이다.3 is a cross-sectional view taken along the line A-A of FIG.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

10:로터리밸브 20:랙하우징10: rotary valve 20: rack housing

30:피니언바 31:피니언30: Pinion Bar 31: Pinion

40:랙바 41:랙40: rack bar 41: rack

50:타이로드 60:피스톤50: tie rod 60: piston

70:지지부재 80:탄성부재70: support member 80: elastic member

이와 같은 목적을 달성하기 위한 본 발명은, 피니언바의 일측에 형성된 피니언과 맞물릴 수 있도록 일측에 랙이 형성된 랙바와, 상기 피니언과 상기 랙을 밀착시킬 수 있도록 상기 랙의 일측을 지지하는 지지부재가 구비된 차량용 조향장치에 있어서, 상기 랙바가 회전방향으로 고정될 수 있도록 상기 랙의 일측과 상기 지지부재는 다수개의 면으로서 밀착된 것을 특징으로 한다.In order to achieve the above object, the present invention provides a rack bar having a rack formed at one side to be engaged with a pinion formed at one side of the pinion bar, and a supporting member for supporting one side of the rack to closely contact the pinion with the rack. In the vehicle steering apparatus provided with, characterized in that one side of the rack and the support member is in close contact with a plurality of surfaces so that the rack bar can be fixed in the rotation direction.

이하에서는 첨부한 도면을 참조하여 본 발명에 따른 바람직한 일실시예를 상세히 설명한다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention;

도 2는 본 발명에 따른 랙하우징의 내부를 보인 단면도이다. 이에 도시된 바와 같이, 로터리밸브(10)는 오일펌프(미도시)를 통해 공급되는 오일을 조절할 수 있도록 마련되는데, 랙하우징(20)과 직교에 가깝도록 교차되어 결합형성된다.2 is a cross-sectional view showing the interior of the rack housing according to the present invention. As shown in this, the rotary valve 10 is provided to adjust the oil supplied through the oil pump (not shown), is formed to cross and close to cross orthogonal to the rack housing (20).

이 로터리밸브(10)의 내부에는 상측으로 연장 형성되는 피니언바(30)가 설치되는데, 이 피니언바(30)는 그 상측이 조향축을 통해 조향핸들과 연결되고, 그 하측에는 피니언(31)이 형성된다.The pinion bar 30 extending upward is installed inside the rotary valve 10. The pinion bar 30 is connected to a steering wheel through an upper side thereof through a steering shaft, and a pinion 31 below the pinion bar 30. Is formed.

그리고 상,하방향으로 길게 형성된 로터리밸브(10)와 그 내부가 연통되도록 마련되는 랙하우징(20)은 좌,우방향으로 길게 형성되며 그 내부에는 피니언바(30)의 하측에 마련된 피니언(31)과 맞물릴 수 있도록 랙(41)이 형성된 랙바(40)가 설치된다.The rack housing 20 provided to communicate with the rotary valve 10 formed in the up and down directions is formed long in the left and right directions and has a pinion 31 provided below the pinion bar 30. Rack bar 40 formed with a rack 41 to be engaged with is installed.

즉, 랙하우징(20)은 로터리밸브(10)를 통해 공급되는 오일이 유동되는 공간을 형성할 수 있도록 마련되는 중공관으로 양측이 개구형성되는데, 개구된 입구측에는 실링을 위한 오일씰 및 오일링 등이 설치되고, 그 외주측에는 신축가능하도록 고무관 등이 설치된다.That is, the rack housing 20 is a hollow tube which is formed to form a space in which the oil supplied through the rotary valve 10 flows, both sides of the opening is formed, the oil inlet and the oil ring for sealing the opening inlet side Is provided, and a rubber tube or the like is provided on the outer circumferential side thereof so as to be elastic.

그리고 랙하우징(20)의 내부에는 로터리밸브(10)에 마련된 피니언(31)과 이물림될 수 있도록 그 중간에 랙(41)이 형성된 랙바(40)가 마련된다.A rack bar 40 having a rack 41 formed therein is provided inside the rack housing 20 so that the pinion 31 provided in the rotary valve 10 can be bitten.

이 랙바(40)는 원통으로 마련되는 금속의 장봉으로서 랙(41)이 설치되는 부분은 피니언(31)과 마주할 수 있도록 일부분이 면으로 형성되고, 이 면에 랙(41)이 가공되어 피니언(31)과 맞물리게 되는 것이다.The rack bar 40 is a cylindrical rod of metal provided in a cylindrical shape, and a portion of the rack 41 is installed to face the pinion 31 so as to face the pinion 31, and the rack 41 is processed on the surface of the pinion. It is engaged with (31).

즉, 랙바(40)는 랙하우징(20)의 내부에서 축방향 이동되도록 마련되는 것으로서, 로터리밸브(10)의 피니언(31)과 이물림될 수 있도록 그 중간에 랙(41)이 형성되고, 그 좌,우측은 조향륜과 직접 연결된 타이로드(50)를 이동시킬 수 있도록 마련된다.That is, the rack bar 40 is provided to be moved axially in the interior of the rack housing 20, the rack 41 is formed in the middle so that the pinion 31 and the bite of the rotary valve 10, The left and right sides are provided to move the tie rod 50 directly connected to the steering wheel.

그리고 랙바(40)의 일측에는 랙하우징(20)의 내부면과 밀착되어 그 안에서 슬라이딩될 수 있도록 피스톤(60)이 마련되는데, 이 피스톤(60)은 로터리밸브(10)와 연결된 두 개의 유압관 사이에 설치되어 로터리밸브(10)를 통해 공급되는 유압에 의해 동작되는 것이다.And one side of the rack bar 40 is provided with a piston 60 to be in close contact with the inner surface of the rack housing 20 to slide therein, the piston 60 is two hydraulic pipes connected to the rotary valve 10 Installed between the operating by the hydraulic pressure supplied through the rotary valve (10).

한편, 본 발명에서는 노면이 불안정하여 랙바(40)에 회전방향으로 하중이 전달될 때 랙바(40)가 회전되는 것을 방지할 수 있는 구조가 마련된다.On the other hand, the present invention is provided with a structure that can prevent the rack bar 40 is rotated when the road surface is unstable and load is transmitted to the rack bar 40 in the rotational direction.

먼저, 랙바(40)의 일부분에 피니언(31)과 맞물릴 수 있도록 면에 이가 형성된 랙(41)은 육각형의 단면을 가지도록 마련된다.First, a rack 41 having teeth formed on a surface of the rack bar 40 to be engaged with a pinion 31 is provided to have a hexagonal cross section.

즉, 랙(41)은 이가 형성된 면을 포함한 모든 외주면이 라운딩형상이 아닌 평평한 면으로 형성되도록 마련되어 원봉으로 마련된 랙바(40)의 중간 일측에 위치하게 되는 것이다.That is, the rack 41 is positioned so that all the outer circumferential surface including the surface on which it is formed is formed as a flat surface rather than a rounded shape, and is positioned at the middle side of the rack bar 40 provided with a round rod.

그리고 이러한 육각형의 단면을 형성하기 위하여 원봉으로 마련된 랙바(40)를 육각형으로 마련된 틀로서 인발가공하게되는 것이다.And to form a hexagonal cross-section is to be drawn to the rack bar 40 provided with a round rod as a frame provided with a hexagon.

다음, 이러한 랙(41)의 배면측에는 랙(41)을 피니언(31)측으로 지지하여 랙(41)과 피니언(31)의 균일한 이물림이 발생될 수 있도록 지지부재(70)가 마련되는데, 이 지지부재(70)는 그 전체형상이 대략 사각단면으로 마련되어 랙하우징(20)의 내부에 고정되며 전방의 피니언(31)측으로는 유동가능하게 마련되는 것이다.Next, a supporting member 70 is provided on the rear side of the rack 41 so as to support the rack 41 toward the pinion 31 side so that a uniform bite of the rack 41 and the pinion 31 can be generated. The supporting member 70 is provided in a substantially rectangular cross section and is fixed to the inside of the rack housing 20, and is provided to be movable to the front pinion 31 side.

또, 이 지지부재(70)의 전방측 내부는 함몰 형성되어 랙(41)의 배면이 그 내부로 삽입되어 밀착되도록 마련되고, 지지부재(70)의 후방측으로는 지지부재(70)가 랙(41)을 피니언(31)측으로 탄성지지할 수 있도록 탄성부재(80)가 마련된다.In addition, the inside of the front side of the support member 70 is recessed and provided so that the rear surface of the rack 41 is inserted into and adhered to the inside thereof, and the support member 70 is disposed on the rear side of the support member 70. An elastic member 80 is provided to elastically support 41 to the pinion 31 side.

이로써 탄성부재(80)에 의해 지지부재(70)가 랙(41)의 배면을 피니언(31)측으로 탄성지지하여 랙(41)과 피니언(31)과 서로 균일하게 이물림되는 것이다.As a result, the support member 70 is elastically supported by the elastic member 80 to the rear side of the rack 41 toward the pinion 31 so that the rack 41 and the pinion 31 are uniformly intersected with each other.

그리고 지지부재(70)의 내부는 육각형의 단면으로 이루어진 랙(41)의 배면과 밀착될 수 있도록 이에 대응되는 형상으로 마련된다.And the inside of the support member 70 is provided in a shape corresponding to it to be in close contact with the rear surface of the rack 41 made of a hexagonal cross section.

즉, 랙(41)의 내부는 육각형 단면의 랙(41) 배면이 절반정도 삽입될 수 있도록 세 개의 면으로서 형성되는 것이다.That is, the inside of the rack 41 is formed as three sides so that the rear surface of the rack 41 of the hexagonal cross section can be inserted about half.

이로써 지지부재(70)는 그 내부에 삽입되는 랙(41)의 배면과 밀착되는데, 이때 밀착되는 부분이 삼면으로 되어있으므로 지지부재(70)의 내부에서 랙(41)이 회전되는 것을 방지시켜주는 것이다.As a result, the support member 70 is in close contact with the rear surface of the rack 41 inserted therein. At this time, since the close contact portion has three surfaces, the support member 70 prevents the rack 41 from rotating inside the support member 70. will be.

이와 같이 구성된 본 발명의 차량용 조향장치는, 운전자가 조향핸들을 회전시킬 때 발생되는 회전력이 조향축을 통해 피니언바(30)에 전달되고, 피니언바(30)에 전달된 회전력은 피니언(31)을 통해 랙(41)의 슬라이딩력으로 바뀌어 전달된다.In the vehicle steering apparatus of the present invention configured as described above, the rotational force generated when the driver rotates the steering wheel is transmitted to the pinion bar 30 through the steering shaft, and the rotational force transmitted to the pinion bar 30 causes the pinion 31 to rotate. It is transferred to the sliding force of the rack 41 through.

그리고 랙(41)에 전달된 슬라이딩력으로 인해 랙바(40)가 동작되어 이와 연결된 타이로드(50)를 통해 조향륜이 동작되는 것이다.In addition, the rack bar 40 is operated due to the sliding force transmitted to the rack 41, and the steering wheel is operated through the tie rod 50 connected thereto.

아울러 차량이 불안정한 노면을 이동하여 차체가 기울어질 때 랙바(40)에 회전방향으로 하중이 전달되는 경우가 생기는데, 이때 피니언(31)과 마주하도록 설치되어 이물림되는 랙(41)은 이를 지지하는 지지부재(70)에 의해 회전이 방지되도록마련되어있으므로 랙(41)과 피니언(31)은 항상 균일한 이물림되는 것이다.In addition, when the vehicle moves on the unstable road surface, the load may be transmitted to the rack bar 40 in a rotational direction when the vehicle body is inclined. In this case, the rack 41 installed to face the pinion 31 is supported to support this. Since the rotation is prevented by the support member 70, the rack 41 and the pinion 31 are always uniformly bited.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 차량용 조향장치는, 랙의 단면이 육각형으로 마련되고 이를 지지하는 지지부재의 내부가 이에 대응되도록 마련되어 랙바의 회전이 방지되므로 랙과 피니언의 균일한 이물림이 이루어진다.As described in detail above, the vehicle steering apparatus according to the present invention is provided with a hexagonal cross section of the rack and the support member for supporting the inside thereof is provided so as to prevent the rotation of the rack bar uniformly bite the rack and pinion This is done.

이로써 랙과 피니언 간의 마모를 저감시킬 수 있어 제품의 신뢰성을 향상시키는 이점이 있다.This can reduce the wear between the rack and the pinion has the advantage of improving the reliability of the product.

Claims (2)

피니언바의 일측에 형성된 피니언과 맞물릴 수 있도록 일측에 랙이 형성된 랙바와, 상기 피니언과 상기 랙을 밀착시킬 수 있도록 상기 랙의 일측을 지지하는 지지부재가 구비된 차량용 조향장치에 있어서,In the vehicle steering apparatus provided with a rack bar having a rack formed on one side to be engaged with the pinion formed on one side of the pinion bar, and a support member for supporting one side of the rack to closely contact the pinion and the rack, 상기 랙바(40)가 회전방향으로 고정될 수 있도록 상기 랙(41)의 일측과 상기 지지부재(70)는 다수개의 면으로서 밀착된 것을 특징으로 하는 차량용 조향장치.One side of the rack 41 and the support member 70 is in close contact with a plurality of surfaces so that the rack bar 40 can be fixed in the rotation direction. 제 1항에 있어서,The method of claim 1, 상기 랙(41)이 형성된 상기 랙바(40)의 일측은 반경방향 단면이 육각형으로 마련되고, 상기 지지부재(70)의 일측은 상기 랙바(40)의 일측이 삽입되어 밀착되도록 상기 랙바(40)와 대응되도록 마련된 것을 특징으로 하는 차량용 조향장치.One side of the rack bar 40 in which the rack 41 is formed is provided with a hexagonal radial cross section, and one side of the support member 70 is inserted into close contact with one side of the rack bar 40 by the rack bar 40. Vehicle steering apparatus, characterized in that provided to correspond with.
KR1020000050005A 2000-08-28 2000-08-28 Steering device for vehicle KR20020016978A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100816431B1 (en) * 2002-12-24 2008-03-26 주식회사 만도 Rack for rattle noise prevention of steering system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152564U (en) * 1984-09-12 1986-04-09
KR950008992A (en) * 1993-09-07 1995-04-21 칸딘 Impeller with bladeless impeller and internal heat transfer mechanism
KR950033025U (en) * 1994-05-20 1995-12-16 만도기계주식회사 Steering system rack bar structure
KR19990021264A (en) * 1997-08-30 1999-03-25 양재신 Rack gear installed in steering gear of car

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6152564U (en) * 1984-09-12 1986-04-09
KR950008992A (en) * 1993-09-07 1995-04-21 칸딘 Impeller with bladeless impeller and internal heat transfer mechanism
KR950033025U (en) * 1994-05-20 1995-12-16 만도기계주식회사 Steering system rack bar structure
KR19990021264A (en) * 1997-08-30 1999-03-25 양재신 Rack gear installed in steering gear of car

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100816431B1 (en) * 2002-12-24 2008-03-26 주식회사 만도 Rack for rattle noise prevention of steering system

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