KR100452299B1 - Rack bush and rack stopper of steering device - Google Patents
Rack bush and rack stopper of steering device Download PDFInfo
- Publication number
- KR100452299B1 KR100452299B1 KR10-2000-0082736A KR20000082736A KR100452299B1 KR 100452299 B1 KR100452299 B1 KR 100452299B1 KR 20000082736 A KR20000082736 A KR 20000082736A KR 100452299 B1 KR100452299 B1 KR 100452299B1
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- rack
- bush
- stopper
- housing
- bar
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D3/00—Steering gears
- B62D3/02—Steering gears mechanical
- B62D3/12—Steering gears mechanical of rack-and-pinion type
- B62D3/126—Steering gears mechanical of rack-and-pinion type characterised by the rack
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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
- B60Y2300/207—Reducing vibrations in the driveline related to drive shaft torsion, e.g. driveline oscillations
-
- 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
- B60Y2306/09—Reducing noise
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Bearings For Parts Moving Linearly (AREA)
Abstract
본 발명의 스티어링장치의 랙부시와 랙스톱퍼에 관한 것으로, 그 목적은 랙부시의 내구성을 향상시키고, 랙부시로 인한 소음을 방지할 수 있도록 금속재로 마련된 랙스톱퍼의 일측에 플라스틱재의 랙부시를 사출성형하여 랙스톱퍼와 랙부시를 일체화하는 스티어링장치의 랙부시와 랙스톱퍼를 제공하는 것이며, 양측이 개구된 중공으로 마련되며 내부에는 축방향 이동되는 랙바(20)가 설치된 랙하우징(10), 외부면은 상기 랙하우징(10)의 내부면과 밀착 고정되고 내부면은 상기 랙바(20)의 외부면과 밀착되어 이의 이동을 안내하는 랙부시(40), 상기 랙부시(40)를 축방향으로 지지할 수 있도록 상기 랙하우징(10)의 개구된 측 내부에 고정 설치된 랙스톱퍼(30), 상기 랙하우징(10)의 내부로 삽입되는 상기 랙스톱퍼(30)에는 내외측으로 관통된 체결공(33)이 다수개 마련되고, 상기 랙부시(40)는 상기 체결공(33)에 삽입되는 체결부(42)와 상기 랙스톱퍼(30)의 축방향과 반경방향으로 밀착되는 부시몸체(41)가 형성되도록 사출성형되어 상기 랙스톱퍼(30)와 일체화되는 구성이다.The present invention relates to a rack bush and a rack stopper of the steering apparatus of the present invention, the purpose of which is to inject a plastic rack bush to one side of the rack stopper provided with a metal material to improve the durability of the rack bush and to prevent noise caused by the rack bush. It provides a rack bushing and a rack stopper of the steering device to integrate the rack stopper and the rack bushing by molding, it is provided in the hollow opening on both sides and the rack housing (10), the rack bar (20) is installed in the axial movement inside, the outside The surface is fixed in close contact with the inner surface of the rack housing 10 and the inner surface is in close contact with the outer surface of the rack bar 20 to guide the movement of the rack bush 40, the rack bush 40 in the axial direction The rack stopper 30 fixedly installed inside the opened side of the rack housing 10 to support the fastening hole 33 penetrated in and outward to the rack stopper 30 inserted into the rack housing 10. ) Many And the rack bush 40 is injection molded to form a fastening part 42 inserted into the fastening hole 33 and a bush body 41 closely contacted in the axial direction and the radial direction of the rack stopper 30. It is configured to be integrated with the rack stopper (30).
Description
본 발명은 스티어링장치의 랙부시와 랙스톱퍼에 관한 것으로서, 더욱 상세하게는 랙부시로 인한 소음을 방지하며 랙부시의 내구성이 향상되도록 랙스톱퍼와 랙부시를 일체화하는 스티어링장치의 랙부시와 랙스톱퍼에 관한 것이다.The present invention relates to a rack bush and a rack stopper of a steering apparatus, and more particularly, a rack bush and a rack stopper of a steering device which integrates a rack stopper and a rack bush to prevent noise caused by the rack bush and to improve durability of the rack bush. It is about.
일반적으로 차량의 진행방향을 변경하기 위해 마련되는 스티어링장치는 차량의 운전석에 마련된 스티어링휠과 이에 연결된 스티어링컬럼, 그리고 스티어링컬럼과 교축되도록 배치된 기어박스등으로 구비된다. 특히 기어박스를 형성하는 랙하우징의 내부에는 축방향으로 슬라이딩 이동되는 랙바가 마련되어 스티어링휠과 스티어링컬럼을 통해 전달된 조향동력을 그 외부 양측의 조향륜으로 전달하게 된다.In general, the steering apparatus provided to change the driving direction of the vehicle is provided with a steering wheel provided in the driver's seat of the vehicle, a steering column connected thereto, and a gearbox arranged to be throttled with the steering column. Particularly, a rack bar that is slidably moved in the axial direction is provided inside the rack housing forming the gear box to transmit steering power transmitted through the steering wheel and the steering column to the steering wheels on both outer sides thereof.
도 1은 이러한 종래 랙하우징 일측의 내부를 보인 단면도이다. 이에 도시된 바와 같이, 중공으로 마련된 랙하우징(1)은 양측이 개구형성되는데, 그 중간측은 미도시된 스티어링컬럼과 연결된다. 그리고 랙하우징(1)의 내부에는 스티어링컬럼측으로부터 동력을 전달받아 축방향으로 이동되도록 랙바(4)가 마련된다.1 is a cross-sectional view showing the inside of one side of such a conventional rack housing. As shown therein, the rack housing 1 provided in a hollow is formed on both sides of the opening, the middle side thereof is connected to the steering column not shown. And inside the rack housing (1) is provided with a rack bar (4) to move in the axial direction by receiving power from the steering column side.
이 랙바(4)는 중간 일측에 랙이 형성되어 이를 통해 스티어링컬럼측의 피니언과 연결되고, 중간 타측에는 피스톤이 마련되어, 피니언에 의한 직접적인 동력전달과 피스톤의 양측으로 공급되는 유압에 의해 랙하우징(1)의 내부에서 슬라이딩 이동된다.The rack bar (4) has a rack formed on one side of the middle is connected to the pinion on the steering column side, the middle is provided with a piston, the rack housing by the direct power transmission by the pinion and the hydraulic pressure supplied to both sides of the piston ( 1) the sliding movement inside.
한편, 개구형성된 랙하우징(1)의 양측에는 랙바(4)의 이동을 안내할 수 있도록 랙부시(5)가 마련되는데, 이 랙부시(5)는 중공의 플라스틱 사출성형물로서, 그 외주면은 랙하우징(1)의 내부와 밀착되어 고정되고, 그 내부면은 랙바(4)의 외부면과 밀착되어 랙바(4)의 슬라이딩을 안내하게 된다.On the other hand, the rack bush 5 is provided on both sides of the opening formed rack housing 1 to guide the movement of the rack bar 4, the rack bush 5 is a hollow plastic injection molding, the outer peripheral surface of the rack It is fixed in close contact with the inside of the housing 1, the inner surface is in close contact with the outer surface of the rack bar (4) to guide the sliding of the rack bar (4).
이 랙부시(5)는 랙하우징(1)에 고정되기 위하여 랙하우징(1)의 개구된 측으로 배치되는 외주면에 서로 대칭되는 세 개의 결합돌기(6)가 마련되고, 이 결합돌기(6)의 사이에는 랙부시(5)가 중심측으로 수축될 수 있도록 슬릿홈(미도시)이 마련되는데, 이에 대응되는 랙하우징(1)의 외주측에는 내,외측으로 관통 형성되어 결합돌기(6)가 삽입 고정되는 결합홈(2)이 마련된다.The rack bush 5 is provided with three engaging projections 6 symmetrical to each other on the outer circumferential surface of the rack housing 1 to be fixed to the rack housing 1, the coupling projection 6 of the A slit groove (not shown) is provided to allow the rack bush 5 to be contracted to the center side, and the outer periphery side of the rack housing 1 corresponding thereto is penetrated inward and outward so that the coupling protrusion 6 is inserted and fixed. The coupling groove 2 is provided.
또, 랙하우징(1)의 개구된 측에는 이를 통해 외부로 연장되는 랙바(4)와 랙하우징(1)의 사이를 밀폐시킴과 동시에 랙부시(5)를 축방향으로 지지할 수 있도록 랙스톱퍼(7)가 마련된다.In addition, on the opened side of the rack housing (1), the rack stopper (4) to seal the space between the rack bar (4) and the rack housing (1) that extends through this and at the same time to support the rack bush (5) in the axial direction (stopper) 7) is provided.
이 랙스톱퍼(7)는 금속재로 마련된 중공관으로서, 내부면은 랙바(4)와 밀착되고 외부면은 랙하우징(1)의 내부에 밀착 고정되며, 랙하우징(1)의 내부에 삽입되는 일측의 반경면은 랙부시(5)와 밀착되어 랙부시(5)를 지지하게 된다.The rack stopper (7) is a hollow tube provided with a metal material, the inner surface is in close contact with the rack bar (4), the outer surface is tightly fixed to the inside of the rack housing (1), one side inserted into the interior of the rack housing (1) Radius of the surface is in close contact with the rack bush 5 is to support the rack bush (5).
그리고 랙스톱퍼(7)의 랙하우징(1) 외부측으로 위치하는 타측은 플랜지형상으로 마련되어 랙하우징(1)의 개구된 면과 밀착되고, 랙하우징(1) 개구된 선단에는 코킹가공으로 인해 랙스톱퍼(7)를 고정시킬 수 있도록 절곡부(미도시)가 형성된다.The other side of the rack stopper 7 located outside the rack housing 1 is provided in a flange shape to be in close contact with the opened surface of the rack housing 1, and the rack stopper 1 is opened by the caulking process. A bent portion (not shown) is formed to fix 7.
이와 같이 구성된 종래의 랙부시(5)와 랙스톱퍼(7)는 랙하우징(1)의 내부에 삽입, 설치하게되는데, 이때 랙하우징(1)의 내측으로 삽입되는 랙부시(5)는 그 외주측의 결합돌기(6)가 랙하우징(1)의 내부면에 비해 큰 지름이므로 먼저 그 반경을 축소시켜야한다.The conventional rack bush 5 and the rack stopper 7 configured as described above are inserted into and installed in the rack housing 1, in which the rack bush 5 inserted into the rack housing 1 is formed on its outer circumference. Since the coupling protrusion 6 on the side is larger in diameter than the inner surface of the rack housing 1, the radius should be reduced first.
즉, 결합돌기(6)가 형성된 측은 슬릿홈에 의해 각각 분할 형성된 자유단이므로 이를 중심측으로 가압하면 슬릿홈의 간격이 줄어듬과 동시에 결합돌기(6)의 전체적인 지름이 줄게 된다. 이때 랙부시(5)를 랙하우징(1)의 내부로 삽입시키고, 결합돌기(6)를 결합홈(2)의 위치까지 진입시키면 자체적인 탄성력에 의해결합돌기(6)가 결합홈(2)의 내측으로 삽입되어 결합된다.That is, since the side formed with the coupling protrusion 6 is a free end formed by each of the slit grooves, pressing them toward the center side reduces the interval between the slit grooves and simultaneously reduces the overall diameter of the coupling protrusion 6. At this time, the rack bush (5) is inserted into the inside of the rack housing (1), when the engaging projection 6 enters the position of the coupling groove (2), the coupling projection (6) by the elastic force of its own coupling groove (2) It is inserted into the inside of the combined.
이후, 랙하우징(1)의 랙부시(5) 후방측으로 랙스톱퍼(7)를 삽입시켜, 랙스톱퍼(7)의 플랜지측을 랙하우징(1)의 개구된 측 반경면과 밀착시키고, 랙하우징(1) 개구된 측 외주면에 형성된 절곡부를 코킹가공하여 랙스톱퍼(7)의 외주면을 감싸도록하여 랙스톱퍼(7)를 고정한다.Thereafter, the rack stopper 7 is inserted into the rear side of the rack bush 5 of the rack housing 1, and the flange side of the rack stopper 7 is brought into close contact with the open side radial surface of the rack housing 1, and the rack housing (1) The rack stopper 7 is fixed by caulking a bent portion formed on the open side outer peripheral surface to surround the outer peripheral surface of the rack stopper 7.
그러나, 이와 같이 구성된 종래 스티어링장치의 랙부시와 랙스톱퍼는, 랙부시를 랙하우징에 결합시키기 위한 구조로서, 랙부시에는 결합돌기와 슬릿홈을 형성하고, 랙하우징에는 결합홈을 형성해야하므로 랙부시의 결합구조가 복잡해지고, 슬릿홈에 의해 랙부시의 내구성이 저하되는 문제점이 있었다.However, the rack bush and the rack stopper of the conventional steering device configured as described above is a structure for coupling the rack bush to the rack housing, the rack bush to form a coupling protrusion and a slit groove, the rack housing to form a coupling groove rack bush Combination structure of the complicated, there was a problem that the durability of the rack bush by the slit groove.
또, 랙부시에 형성된 결합돌기와 랙하우징에 형성된 결합홈의 사이에는, 중심측으로 가압되었다가 원위치로 복원되는 결합돌기가 원활히 삽입될 수 있도록 유격이 필요하게되는데, 이로 인해 랙바의 동작시 랙부시가 유동되어 결합돌기와 결합홈의 사이와, 서로 분리 형성된 랙부시와 랙스톱퍼의 사이에서 소음이 발생되는 문제점이 있었다.In addition, between the engaging projection formed in the rack bushing and the engaging groove formed in the rack housing, a clearance is required so that the engaging projection that is pressed to the center side and restored to its original position can be inserted smoothly. There was a problem that noise is generated between the coupling protrusion and the coupling groove and between the rack bush and the rack stopper formed to be separated from each other.
본 발명은 이와 같은 종래의 문제점을 해결하기 위한 것으로서, 본 발명의 목적은, 랙부시의 내구성을 향상시키고, 랙부시로 인한 소음을 방지할 수 있도록 금속재로 마련된 랙스톱퍼의 일측에 플라스틱재의 랙부시를 사출성형하여 랙스톱퍼와 랙부시를 일체화하는 스티어링장치의 랙부시와 랙스톱퍼를 제공하는 것이다.The present invention is to solve such a conventional problem, an object of the present invention, to improve the durability of the rack bush, the rack bush of the plastic material on one side of the rack stopper provided with a metal material to prevent the noise caused by the rack bush It is to provide a rack bush and a rack stopper of the steering device to integrate the rack stopper and the rack bush by injection molding.
도 1은 종래의 랙부시와 랙스톱퍼가 설치된 랙하우징의 단면도이다.1 is a cross-sectional view of a rack housing having a conventional rack bush and a rack stopper.
도 2는 본 발명에 따른 랙부시와 랙스톱퍼가 설치된 랙하우징의 단면도이다.2 is a cross-sectional view of a rack housing with a rack bush and a rack stopper according to the present invention.
도 3은 본 발명에 따른 랙부시와 랙스톱퍼를 보인 사시도이다.3 is a perspective view illustrating a rack bush and a rack stopper according to the present invention.
도 4는 본 발명의 다른 실시예를 보인 단면도이다.4 is a cross-sectional view showing another embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings
10:랙하우징 20:랙바10: rack housing 20: rack bar
30:랙스톱퍼 31:플랜지부30: rack stopper 31: flange
32:삽입부 33:체결공32: Insertion part 33: Fastener
40:랙부시 41:부시몸체40: rack bush 41: bush body
42:체결부 43:안내면42: Fastening part 43: Guide surface
이와 같은 목적을 달성하기 위한 본 발명 스티어링장치의 랙부시와 랙스톱퍼는, 양측이 개구된 중공으로 마련되며 내부에는 축방향 이동되는 랙바가 설치된 랙하우징과, 외부면은 상기 랙하우징의 내부면과 밀착 고정되고 내부면은 상기 랙바의 외부면과 밀착되어 이의 이동을 안내하는 랙부시와, 상기 랙부시를 축방향으로 지지할 수 있도록 상기 랙하우징의 개구된 측 내부에 고정 설치된 랙스톱퍼를 구비한 스티어링 장치에 있어서, 상기 랙하우징의 내부로 삽입되는 상기 랙스톱퍼에는 내외측으로 관통된 체결공이 다수개 마련되고, 상기 랙부시는 상기 체결공에 삽입되는 체결부와 상기 랙스톱퍼의 축방향과 반경방향으로 밀착되는 부시몸체가 형성되도록 사출성형되어 상기 랙스톱퍼와 일체화된 것을 특징으로 한다.The rack bush and the rack stopper of the present invention steering apparatus for achieving the above object is provided in a hollow housing with both sides opened and the rack housing is installed axially moved inside, and the outer surface and the inner surface of the rack housing It is closely fixed and the inner surface is in close contact with the outer surface of the rack bar to guide the movement of the rack bush and a rack stopper fixedly installed inside the open side of the rack housing to support the rack bush in the axial direction In the steering apparatus, the rack stopper inserted into the rack housing is provided with a plurality of fastening holes penetrating inward and outward, and the rack bush is inserted into the fastening hole and the axial direction and the radial direction of the rack stopper. Injection molding to form a bush body in close contact with the rack is characterized in that integrated with the rack stopper.
이하에서는 첨부한 도면을 참조하여 본 발명에 따른 바람직한 일실시예의 구성 및 작용효과를 상세히 설명한다. 도 2는 본 발명에 따른 랙부시와 랙스톱퍼가 설치된 랙하우징의 단면도이고, 도 3은 본 발명에 따른 랙부시와 랙스톱퍼를 보인 사시도이다. 이에 도시된 바와 같이, 중공으로 마련된 랙하우징(10)은 양측이 개구형성되는 중공관으로서, 로터리밸브를 통해 공급되는 오일이 유동되는 공간을 형성하며, 개구된 입구측에는 실링을 위한 오일씰 및 오일링 등이 설치되고, 그 외주측에는 신축가능하도록 벨로즈가 설치된다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and effect of the preferred embodiment according to the present invention. 2 is a cross-sectional view of a rack housing with a rack bush and a rack stopper according to the present invention, Figure 3 is a perspective view showing a rack bush and a rack stopper according to the present invention. As shown therein, the rack housing 10 provided as a hollow is a hollow tube having openings on both sides, and forms a space in which oil supplied through a rotary valve flows, and an oil seal and an oil ring for sealing at the opened inlet side. The back is provided, and the bellows is provided in the outer peripheral side so that it can be stretched.
그리고 랙하우징(10)의 중간측은 스티어링컬럼과 연결되는데, 이 랙하우징(10)의 내부에는 스티어링컬럼측으로부터 동력을 전달받아 축방향으로 이동되도록 랙바(20)가 마련된다. 즉, 랙바(20)는 중간 일측에 랙(미도시)이 형성되어 이를 통해 스티어링컬럼측의 피니언과 연결되고, 중간 타측에는 피스톤이 마련되어, 피니언에 의한 동력전달과 피스톤 양측의 유압에 의해 랙하우징(10)의 내부에서 슬라이딩 이동되어 그 좌,우측의 타이로드엔드(미도시)를 동작시키게 된다.And the middle of the rack housing 10 is connected to the steering column, the rack housing 10 is provided with a rack bar 20 to receive power from the steering column side to move in the axial direction. That is, the rack bar 20 is a rack (not shown) is formed on one side of the middle is connected to the pinion on the steering column side, the middle is provided with a piston, the rack housing by the power transmission by the pinion and the hydraulic pressure on both sides of the piston Sliding movement in the inside of the 10 to operate the left and right tie rod end (not shown).
한편, 랙하우징(10)의 양측에는 랙바(20)의 이동을 안내할 수 있도록 랙부시(40)가 마련되고, 그 외측으로는 랙부시(40)를 축방향으로 지지할 수 있도록 랙스톱퍼(30)가 마련되는데, 본 발명의 랙부시(40)와 랙스톱퍼(30)는, 랙부시(40)의 내구성을 향상시킴과 동시에 랙부시(40)로 인한 소음을 방지할 수 있도록 일체화 형성된다.On the other hand, both sides of the rack housing 10 is provided with a rack bush 40 to guide the movement of the rack bar 20, the outer side of the rack bush 40 so as to support the rack bush 40 in the axial direction ( 30 is provided, the rack bush 40 and the rack stopper 30 of the present invention is integrally formed to improve the durability of the rack bush 40 and at the same time prevent noise caused by the rack bush (40). .
먼저, 랙하우징(10)의 개구된 입구측에 설치되는 랙스톱퍼(30)는 랙하우징(10)의 개구된 측과 이를 통해 외부로 연장되는 랙바(20)의 사이를 밀폐시킴과 동시에 랙부시(40)를 축방향으로 지지할 수 있도록 마련되는 금속재의 중공관으로서, 랙하우징(10)의 내부로 삽입 설치되는데, 그 일측에는 랙하우징(10)의 입구 외주측으로 확장형성된 플랜지부(31)가 마련되어 랙하우징(10) 입구에 형성된 절곡부를 코킹할 때 이와 결합되어 랙하우징(10)에 고정된다.First, the rack stopper 30 installed at the inlet side of the rack housing 10 seals the space between the open side of the rack housing 10 and the rack bar 20 extending therethrough and at the same time the rack bushing. As the hollow tube of the metal material provided to support the 40 in the axial direction, it is inserted into the interior of the rack housing 10, one side of the flange portion 31 is extended to the outer peripheral side of the inlet of the rack housing 10 Is provided when the bent portion formed at the entrance of the rack housing 10 is coupled to it is fixed to the rack housing (10).
그리고 랙하우징(10)의 내부에 삽입되는 랙스톱퍼(30)의 삽입부(32)는 선단측의 지름이 플랜지부(31)측의 지름에 비해 작게 마련되어 그 사이에 단차가 형성되고, 지름이 작은 측의 반경면 대략 축방향 중간정도에는 내,외측을 관통하는 원형의 체결공(33)이 다수개 마련된다.In addition, the insertion portion 32 of the rack stopper 30 inserted into the rack housing 10 has a diameter at the tip side smaller than the diameter at the flange portion 31 side, and a step is formed therebetween, and the diameter is A plurality of circular fastening holes 33 penetrating the inner and outer sides are provided at approximately the middle in the radial plane of the small side.
다음, 랙부시(40)는 개구형성된 랙하우징(10)의 양측에 설치되어 랙바(20)의 이동을 안내할 수 있도록 그 외주면은 랙하우징(10)의 내부와 밀착되고, 그 내부면은 랙바(20)의 외부면과 밀착되어 랙바(20)의 슬라이딩을 안내하는 중공의 플라스틱 사출성형물로서, 사출성형시에 금속재인 랙스톱퍼(30)와 일체로 형성된다.Next, the rack bush 40 is installed on both sides of the opening formed rack housing 10 so that the outer peripheral surface is in close contact with the inside of the rack housing 10 so as to guide the movement of the rack bar 20, the inner surface of the rack bar The hollow plastic injection molded product which is in close contact with the outer surface of the 20 to guide the sliding of the rack bar 20 is formed integrally with the rack stopper 30 which is a metal material at the time of injection molding.
즉, 랙부시(40)는 사출성형시 금속재로 제작된 랙스톱퍼(30)를 성형몰드 일측에 배치시킨 후 사출성형재를 성형몰드의 내부에 사출하여 그 형상을 마련하는 것으로서, 이러한 공정시 사출성형재가 랙스톱퍼(30)의 반경면에 형성된 체결공(33)의 내부로 유입되어 고착됨으로서 랙스톱퍼(30)와 일체화되는 것이다.That is, the rack bush 40 is to arrange the rack stopper 30 made of a metal material on one side of the molding mold during injection molding, and then to inject the injection molding material into the inside of the molding mold to prepare its shape. The molding material is integrated into the rack stopper 30 by being introduced into and fastened into the fastening hole 33 formed in the radial surface of the rack stopper 30.
이러한 사출공정을 거쳐 체결공(33)에는 고착형성된 체결부(42)가 마련되고, 이 체결부(42)의 내측과 외측으로는 랙바(20)를 안내해줄 수 있도록 부시몸체(41)가 마련되는데, 이 부시몸체(41)의 외부면은 랙하우징(10)의 내부면과 밀착되고, 그 내측으로는 랙스토퍼 삽입부(32)의 작은 지름으로 마련된 부분을 덮게 된다.Through the injection process, the fastening hole 33 is provided with a fastened fastening part 42, and the bush body 41 is provided to guide the rack bar 20 to the inside and the outside of the fastening part 42. The outer surface of the bush body 41 is in close contact with the inner surface of the rack housing 10, and the inner surface of the bush body 41 covers a portion provided with a small diameter of the rack stopper insert 32.
또, 부시몸체(41)의 내부면은 랙바(20)를 안내해줄 수 있도록 마련되는데, 랙바(20)와의 마찰면적을 줄여 마찰저항을 감소시킬 수 있도록 축방향으로 중간측만이 랙바(20)의 외주면과 마주하도록 안내면(43)이 마련되고, 그 전후측은 외부측으로 경사지게 마련되어 랙바(20)의 외주면과 이격된다.In addition, the inner surface of the bush body 41 is provided to guide the rack bar 20, only the intermediate side of the rack bar 20 in the axial direction to reduce the frictional area with the rack bar 20 to reduce the frictional resistance The guide surface 43 is provided to face the outer circumferential surface, and the front and rear sides thereof are inclined toward the outer side to be spaced apart from the outer circumferential surface of the rack bar 20.
도 4는 본 발명의 다른 실시예를 보인 단면도로서, 이에 도시된 바와 같이 랙스톱퍼(130)는 일측에 플랜지부(131)가 형성되며 타측은 동일한 지름의 삽입부(132)가 형성된 금속재질의 중공원관으로서, 삽입부(132)의 반경면에는 다수개의 체결공(133)이 마련된다. 그리고 이 체결공(133)이 형성된 삽입부(132)의 내측으로 랙스톱퍼(130)와 일체화되는 랙부시(140)가 마련된다.4 is a cross-sectional view showing another embodiment of the present invention, as shown in the rack stopper 130 is formed of a flange portion 131 on one side and the other side of the metal material formed with the insertion portion 132 of the same diameter As a hollow park tube, a plurality of fastening holes 133 are provided on the radial surface of the insertion portion 132. And the rack bush 140 is integrated with the rack stopper 130 to the inside of the insertion portion 132, the fastening hole 133 is provided.
이 랙부시(140)는 개구형성된 랙하우징의 양측에 설치되어 랙바의 이동을 안내할 수 있도록 그 외주면은 랙하우징의 내부와 밀착되고, 그 내부면은 랙바의 외부면과 밀착되어 랙바의 슬라이딩을 안내하는 중공의 플라스틱 사출성형물로서, 사출성형시에 금속재인 랙스톱퍼(130)와 일체로 형성된다.The rack bush 140 is installed on both sides of the opening formed rack housing to guide the movement of the rack bar, its outer peripheral surface is in close contact with the inside of the rack housing, the inner surface is in close contact with the outer surface of the rack bar to slide the rack bar A hollow plastic injection molded product to be guided, which is formed integrally with the rack stopper 130 which is a metal material at the time of injection molding.
즉, 랙부시(140)는 사출성형시 금속재로 제작된 랙스톱퍼(130)를 성형몰드 일측에 배치시킨 후 사출성형재를 성형몰드의 내부에 사출하여 그 형상을 마련하는 것으로서, 이러한 공정시 사출성형재가 랙스톱퍼(130)의 반경면에 형성된 체결공(133)의 내부로 유입되어 고착됨으로서 랙스톱퍼(130)와 일체화된다. 그리고 사출공정을 거쳐 체결공(133)에는 고착형성된 체결부(142)가 마련되고, 이 체결부(142)의 내측으로는 랙바를 안내해줄 수 있도록 부시몸체(141)가 마련된다. 또, 부시몸체(141)의 내부면에는 랙바와의 마찰면적을 줄여 마찰저항을 감소시킬 수 있도록 축방향으로 중간측만이 랙바의 외주면과 마주하도록 안내면(143)이 마련된다.That is, the rack bush 140 is to arrange the rack stopper 130 made of a metal material on one side of the molding mold during injection molding, and then to inject the injection molding material into the inside of the molding mold to prepare its shape. Molding material is introduced into the fastening hole 133 formed on the radial surface of the rack stopper 130 and fixed, thereby being integrated with the rack stopper 130. In addition, the fastening hole 133 is provided with a fastening part 142 fixedly formed through the injection process, and a bush body 141 is provided inside the fastening part 142 to guide the rack bar. In addition, the inner surface of the bush body 141 is provided with a guide surface 143 so as to face the outer circumferential surface of the rack bar in the axial direction only to reduce the friction area with the rack bar to reduce the frictional resistance.
이와 같이 구성된 본 발명 스티어링장치의 랙부시와 랙스톱퍼는, 금속재로 마련된 랙스톱퍼(30,131)에 랙부시(40,140)를 일체화되도록 사출성형하고, 일체화된 랙부시(40,140)와 랙스톱퍼(30,130)를 랙하우징(10)에 삽입한 후 랙하우징(10)의 절곡부를 랙스톱퍼(30,130)의 플랜지부(31,131)와 코킹가공하여 결합시키게 된다. 이로써 랙스톱퍼(30,130)가 랙하우징(10)에 고정됨과 함께 이에 일체화된 랙부시(40,140)가 랙하우징(10) 내부에 용이하게 고정되는 것이다.The rack bush and the rack stopper of the steering apparatus of the present invention configured as described above are injection molded to integrate the rack bushes 40 and 140 into the rack stoppers 30 and 131 made of metal, and the integrated rack bushes 40 and 140 and the rack stopper 30 and 130 are integrated. After inserting into the rack housing 10, the bent portion of the rack housing 10 is coupled to the flange portion 31, 131 of the rack stopper (30, 130) by caulking. As a result, the rack stoppers 30 and 130 are fixed to the rack housing 10 and the rack bushes 40 and 140 integrated therein are easily fixed to the inside of the rack housing 10.
이상에서 상세히 설명한 바와 같이, 본 발명에 따른 스티어링장치의 랙부시와 랙스톱퍼는, 랙부시와 랙스톱퍼가 일체화되어 연결 형성됨으로써 랙부시를 랙하우징에 결합시키기 위한 별도의 구조가 필요없어 랙부시의 구조가 간단해지고, 랙부시의 구조가 절결부위없는 단순한 원통구조로 마련되어 내구성이 향상된다. 그리고 랙부시가 사출성형으로 랙스톱퍼에 밀착 형성되므로 랙하우징과 랙스톱퍼와의 사이에 유격이 없어 랙바의 동작시 소음이 저감되는 이점이 있다.As described in detail above, the rack bush and the rack stopper of the steering apparatus according to the present invention, the rack bush and the rack stopper is formed integrally connected, so that a separate structure for coupling the rack bush to the rack housing is not necessary The structure is simplified, and the structure of the rack bush is provided with a simple cylindrical structure having no cutouts, thereby improving durability. In addition, since the rack bush is formed in close contact with the rack stopper by injection molding, there is no play between the rack housing and the rack stopper, thereby reducing noise during operation of the rack bar.
Claims (2)
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| KR10-2000-0082736A KR100452299B1 (en) | 2000-12-27 | 2000-12-27 | Rack bush and rack stopper of steering device |
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| KR10-2000-0082736A KR100452299B1 (en) | 2000-12-27 | 2000-12-27 | Rack bush and rack stopper of steering device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101345435B1 (en) | 2010-02-23 | 2013-12-27 | 주식회사 만도 | Rack bush, and rack and pinion type steering apparatus for vehicle having the same |
| US11118623B2 (en) | 2019-11-07 | 2021-09-14 | Hyundai Mobis Co., Ltd. | Rack bush for vehicle steering apparatus |
| US11199218B2 (en) | 2019-06-04 | 2021-12-14 | Hyundai Mobis Co., Ltd. | Rack bush of steering device for vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101352307B1 (en) * | 2012-08-20 | 2014-01-16 | 주식회사 만도 | Rack pinion type steering apparatus |
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| KR950033024U (en) * | 1994-05-20 | 1995-12-16 | 만도기계 주식회사 | Rack bush structure of automobile steering gear box |
| KR950033028U (en) * | 1994-05-20 | 1995-12-16 | Rack Bush Structure of Steering Gear Box for Automobile | |
| KR970058044U (en) * | 1996-04-10 | 1997-11-10 | 대우중공업주식회사 | Rack bushing for rack gear of automobile steering system |
| KR20000003191U (en) * | 1998-07-18 | 2000-02-15 | 오상수 | Steering system with reduced rattle noise |
-
2000
- 2000-12-27 KR KR10-2000-0082736A patent/KR100452299B1/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59192670A (en) * | 1983-04-15 | 1984-11-01 | Nissan Motor Co Ltd | Rack shaft supporting structure for rack and pinion steering gear |
| JPH04210121A (en) * | 1990-11-30 | 1992-07-31 | Taiho Kogyo Co Ltd | Rack bushing |
| KR950033024U (en) * | 1994-05-20 | 1995-12-16 | 만도기계 주식회사 | Rack bush structure of automobile steering gear box |
| KR950033028U (en) * | 1994-05-20 | 1995-12-16 | Rack Bush Structure of Steering Gear Box for Automobile | |
| KR970058044U (en) * | 1996-04-10 | 1997-11-10 | 대우중공업주식회사 | Rack bushing for rack gear of automobile steering system |
| KR20000003191U (en) * | 1998-07-18 | 2000-02-15 | 오상수 | Steering system with reduced rattle noise |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101345435B1 (en) | 2010-02-23 | 2013-12-27 | 주식회사 만도 | Rack bush, and rack and pinion type steering apparatus for vehicle having the same |
| US11199218B2 (en) | 2019-06-04 | 2021-12-14 | Hyundai Mobis Co., Ltd. | Rack bush of steering device for vehicle |
| US11118623B2 (en) | 2019-11-07 | 2021-09-14 | Hyundai Mobis Co., Ltd. | Rack bush for vehicle steering apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20020053246A (en) | 2002-07-05 |
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