KR20040056524A - Rack for rattle noise prevention of steering system - Google Patents

Rack for rattle noise prevention of steering system Download PDF

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Publication number
KR20040056524A
KR20040056524A KR1020020083025A KR20020083025A KR20040056524A KR 20040056524 A KR20040056524 A KR 20040056524A KR 1020020083025 A KR1020020083025 A KR 1020020083025A KR 20020083025 A KR20020083025 A KR 20020083025A KR 20040056524 A KR20040056524 A KR 20040056524A
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South Korea
Prior art keywords
rack
pinion
gear
rack gear
yoke
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KR1020020083025A
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Korean (ko)
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KR100816431B1 (en
Inventor
이권호
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주식회사 만도
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Priority to KR1020020083025A priority Critical patent/KR100816431B1/en
Publication of KR20040056524A publication Critical patent/KR20040056524A/en
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Publication of KR100816431B1 publication Critical patent/KR100816431B1/en

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/26—Racks
    • F16H55/28—Special devices for taking up backlash
    • F16H55/283—Special devices for taking up backlash using pressure yokes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)

Abstract

PURPOSE: A rack for preventing rattle noise of a steering system is provided to reduce impact and prevent rattle noise by contacting the round surface sequentially in bumping the rack gear to the pinion gear with inclining the tooth profile of the rack gear and rounding the inclined surface. CONSTITUTION: A steering system for a vehicle comprises a tubular rack housing(200) formed horizontally and longitudinally; a pinion contained in the rack housing and formed in the lower part of a pinion bar(220); a rack bar(205) engaged with the pinion and composed of a rack; a support yoke(225) formed in the rear part of the rack to contact the rack to the pinion; a spring(230) elastically supporting the support yoke; and a yoke seat(240) containing the support yoke and the spring. The rack gear(210) of the rack bar is linearly formed and inclined to the end of the rack gear. The inclined surface(212) of the rack gear is tilted with 5-10 angular degrees, and rounded with the specific curvature.

Description

조향장치의 래틀 노이즈 방지용 랙{RACK FOR RATTLE NOISE PREVENTION OF STEERING SYSTEM}Rattle noise prevention rack of steering system {RACK FOR RATTLE NOISE PREVENTION OF STEERING SYSTEM}

본 발명은 조향장치에 관한 것으로, 특히 조향핸들의 회전력을 조향칼럼과 유니버설 조인트를 거쳐 피니언기어의 치합에 의해 바퀴에 전달하는 래틀 노이즈방지용 랙에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering apparatus, and more particularly, to a rack for preventing rattle noise, which transmits the rotational force of a steering wheel to a wheel by engagement of a pinion gear via a steering column and a universal joint.

일반적으로 차량용 조향장치는 운전자의 조작에 따라 차량의 진행방향으로 바꿀 수 있도록 마련되며, 조향핸들의 회전력이 조향칼럼의 조향주축을 통하여 유니버설조인트에 전달되고, 이 유니버설조인트에 전달된 조향핸들의 회전력은 랙기어와 피니언 기어를 통하여 바퀴로 전달되어 차량을 조향할 수 있게 된다.In general, the steering device for a vehicle is provided to change the driving direction of the vehicle according to the driver's operation, and the rotational force of the steering wheel is transmitted to the universal joint through the steering shaft of the steering column, and the rotational force of the steering wheel transmitted to the universal joint. Is transmitted to the wheels through rack gears and pinion gears to steer the vehicle.

도 1은 종래의 랙기어와 피니언기어의 서포트요크의 조립단면도이다. 도시된 바와 같이, 랙하우징(100)은 좌,우방향으로 길게 형성된 튜브로서 그 내부에는 피니언샤프트(115)의 하측에 형성된 피니언기어(120) 이에 치합될 수 있는 랙기어(110)가 형성된 랙바(105)를 수용한다.1 is an assembled cross-sectional view of a support yoke of a conventional rack gear and a pinion gear. As shown, the rack housing 100 is a tube formed long in the left and right directions, the rack bar formed therein rack gear 110 that can be engaged with the pinion gear 120 formed on the lower side of the pinion shaft 115 House 105.

그리고, 이 랙바(105)는 금속재 원형봉으로 일부에 랙기어(110)가 형성되어 있고, 이 랙기어(110)의 배면에는 상기 랙기어(110)와 피니언기어(120)가 치합될 수 있도록 밀어주는 서포트요크(125)가 형성되어 있다.In addition, the rack bar 105 is a circular rod of metal is formed in the rack gear 110, a part of the rack gear 110 so that the rack gear 110 and the pinion gear 120 can be engaged. Pushing support yoke 125 is formed.

또한, 이 서포트요크(125)는 원형봉에 상기 랙바(105)를 수용할 수 있는 반원형의 함몰부가 밀면에 형성되어 있고, 이 서포트요크(125)의 배면에는 스프링(130)에 의해서 탄성지지된다.In addition, the support yoke 125 has a semicircular recessed portion for accommodating the rack bar 105 in a round bar on a pushing surface, and is elastically supported by a spring 130 on the back surface of the support yoke 125. .

한편, 이 서포트요크(125)에는 중공원통의 일단에 플랜지가 형성된 요크시트(140)의 내부에 수용되고, 이 요크시트(140)의 타단에는 고정너트(145)가 부착된다.On the other hand, the support yoke 125 is accommodated in the inside of the yoke sheet 140 having a flange formed at one end of the hollow park cylinder, and the fixing nut 145 is attached to the other end of the yoke sheet 140.

그리고 이 고정너트(145)의 중앙에는 나사산이 형성된 구멍이 형성되고, 이 구멍에 수용되며 외주면에 나사산이 형성되고 밑면에 스프링을 삽입하기 위한 돌출부가 중앙에 형성된 플러그(135)가 치합되어 스프링(130)을 지지하면서 요크시트(140)를 밀페시켜준다.In the center of the fixing nut 145, a threaded hole is formed, and the plug 135 formed at the center of the protrusion for receiving a spring is formed in the outer circumferential surface and inserted into the bottom of the fixing nut 145 is engaged with the spring ( The yoke sheet 140 is sealed while supporting the 130.

이로써 스프링(130)에 의해 서포트요크(125)를 랙(110)의 배면에 밀착시켜줌으로 랙기어(110)가 피니언(120)기어에 치합된다. 그러므로 운전자가 조향핸들을 회전시킬 때 발생되는 회전력이 조향축을 통하여 피니언 샤프트(115)에 전달되고, 이 피니언 샤프트(115)에 전달된 회전력은 피니언기어(120)를 통하여 랙기어(110)에 전달되며, 랙기어(110)에 전달된 회전력이 랙바(105)를 이송시킴으로 이 랙바(105)에 연결된 타이로드를 통하여 바튀가 동작된다.Accordingly, the rack gear 110 is engaged with the pinion 120 gear by bringing the support yoke 125 into close contact with the rear surface of the rack 110 by the spring 130. Therefore, the rotational force generated when the driver rotates the steering wheel is transmitted to the pinion shaft 115 through the steering shaft, and the rotational force transmitted to the pinion shaft 115 is transmitted to the rack gear 110 through the pinion gear 120. As the rotational force transmitted to the rack gear 110 transfers the rack bar 105, the batt is operated through a tie rod connected to the rack bar 105.

상기에서 조향기어의 동력 전달시 타이어로부터 받는 진동과 외력이 랙바(105)에 전달되거나 조향핸들 조타시 랙바(105)와 피니언기어(120) 사이에 치 접촉부에서 랙바(105)와 피니언기어(120) 치간 벌어지려는 힘이 랙바(105)를 배면에서 누르는 요크스프링(130)의 힘 보다 크게 되면 랙바(105)가 회전하게 되고 벌어지려는 힘이 요크스프링(130) 보다 작게되면 원위치로 돌아오게 된다. 이때 랙바(105)가 원위치로 돌아올때 피니언기어(120)와 랙바(105)의 치들이 충돌하면서 충격음이 발생하고 이런 동작이 계속 반복되거나 간헐적으로 발생시 래틀노이즈가 발생한다. 래틀노이즈가 차량 주행중 발생하면 운전자에게 불괘감을 주고 품질의 신뢰성도 떨어진다.The vibration and external force received from the tire when the power transmission of the steering gear is transmitted to the rack bar 105 or the rack bar 105 and the pinion gear 120 at the tooth contact portion between the rack bar 105 and the pinion gear 120 when steering the steering wheel. ) When the interdental force is greater than the force of the yoke spring 130 that presses the rack bar 105 from the back, the rack bar 105 rotates, and when the force to be opened becomes smaller than the yoke spring 130, it returns to its original position. do. At this time, when the rack bar 105 returns to its original position, the pinion gear 120 and the teeth of the rack bar 105 collide with each other, and an impact sound is generated, and when this operation is repeated repeatedly or intermittently, rattle noise occurs. If rattle noise occurs while driving a vehicle, it is uncomfortable for the driver and the quality is not reliable.

본 발명은 전술한 바와 같은 문제점을 해결하기 위한 것으로, 랙바와 피니언간의 치간 분력에 의해 랙바가 소정량 회전했다가 원위치로 돌아올때 피니언과 랙바의 충돌을 부드럽게 유도하기 위해서 치단면이 직선적으로 되어 있는 랙에 치단면이 소정의 경사를 주어 둥글게 형성함으로써 랙바와 피니언간의 래틀 소음을 줄 일 수 있는 래틀 방지용 랙을 구비한 차량용 조향장치를 제공함에 있다.The present invention is to solve the problems described above, when the rack bar is rotated by a predetermined amount by the interdental force between the rack bar and the pinion, the tooth cross section is straight in order to smoothly induce the collision between the pinion and the rack bar. To provide a vehicle steering apparatus having a rack for preventing the rattle to reduce the rattle noise between the rack bar and the pinion by forming a rounded tooth cross section given a predetermined slope.

도 1은 종래의 랙기어와 피니언 기어의 서포트 요크를 보인 단면도이다.1 is a cross-sectional view showing a support yoke of a conventional rack gear and a pinion gear.

도 2는 본 발명에 따른 랙기어와 피니언 기어의 서포트 요크를 보인 단면도이다.2 is a cross-sectional view showing the support yoke of the rack gear and the pinion gear according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

200 : 랙하우징 205 : 랙바200: rack housing 205: rack bar

210 : 랙기어 212 : 경사면210: rack gear 212: slope

215 : 피니언 샤프트 220 : 피니언기어215: pinion shaft 220: pinion gear

225 : 서포트요크 230 : 스피링225: support yoke 230: spring

235 : 플러그 240 : 요크시트235 plug 240 yoke seat

245 : 고정너트245: fixing nut

본 발명은 상기의 목적을 달성하기 위하여 좌,우방향으로 길게 형성되어 스티어링 기어 전체를 지지하는 구주물인 랙하우징과, 상기 랙하우징에 수용되며 피니언 샤프트의 하측에 형성된 피니언과, 상기 피니언에 치합되며 일측에 랙기어가 형성된 랙바와, 상기 피니언에 상기 랙을 밀착시킬 수 있도록 상기 랙의 배면에 마련되는 서포트요크와, 상기 서포트요크를 탄성지지하는 스프링과 상기 서포트요크와 스프링을 수용하는 요크시트를 포함하여 이루어진 차량용 조향장치에 있어서, 상기 랙바에 형성되는 랙기어는 그 중심을 기준으로 폭방향 양측으로 소정거리 직선구간을 유지하다가 랙기어의 끝단까지 소정의 경사면을 이루는 것을 특징으로 하는 래틀 노이즈 방지용 랙을 구비한 차량용 조향장치를 제공한다.The present invention is a rack housing which is formed long in the left and right directions to support the entire steering gear, and the pinion is accommodated in the rack housing and formed on the lower side of the pinion shaft in order to achieve the above object, and is fitted to the pinion A rack bar having a rack gear formed at one side thereof, a support yoke provided at the rear of the rack to closely contact the rack with the pinion, a spring for elastically supporting the support yoke, and a yoke sheet accommodating the support yoke and the spring; In the vehicular steering device comprising a, the rack gear formed in the rack bar for preventing the rattle noise, characterized in that to form a predetermined inclined surface to the end of the rack gear while maintaining a predetermined distance straight line on both sides in the width direction based on the center Provided is a vehicle steering apparatus having a rack.

그리고 상기 경사면의 경사각은 5 ~ 10°인 것을 특징으로 하고, 또한 경사면을 일정한 곡률로 둥글게 형성하는 것을 특징으로 한다.And it is characterized in that the inclination angle of the inclined surface is 5 to 10 °, and further characterized in that the inclined surface is formed rounded with a constant curvature.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 2에 도시된 바와 같이, 랙하우징(200)은 좌,우방향으로 길게 형성도어 스티어링 기어 전체를 지지하는 구주물로서 그 내부에는 피니언 샤프트(215)의 하축에 형성된 피니언기어(220)와 이에 치합될 수 있는 랙기어(210)가 형성된 랙바(205)를 수용한다.As shown in FIG. 2, the rack housing 200 is a structure supporting the entire door steering gear formed long in the left and right directions, and therein, the pinion gear 220 formed in the lower shaft of the pinion shaft 215 therein. It accommodates a rack bar 205 is formed a rack gear 210 that can be engaged.

그리고, 이 랙바(205)는 금속재 원형봉으로서 일부에 랙기어(210)가 형성되어 있고, 이 랙기어(210)의 배면에는 상기 랙기어(210)와 피니언기어(220)가 치합될 수 있도록 밀어주는 서포트요크(225)가 형성되어 있다. 상기 랙바(205)에 형성되는 랙기어(210)의 끝단은 종래에는 랙바(205)의 평평한 단면을 따라 가공하여 직선적으로 형성하였으나, 본 발명에서는 직선구간(A)을 줄이고 랙기어(210)의 중앙에서 양측으로 소정거리 떨어진 지점부터 랙기어(210)의 끝단까지 소정의 경사면(212)을 갖도록 한다. 상기의 경사면(212)의 경사각이 너무 크면 피니언기어(220)와의 이물림율이 낮아지므로 경사각은 5 ~ 10°이하(B)가 바람직 하다.In addition, the rack bar 205 is a circular rod of metal, and a rack gear 210 is formed on a part of the rack gear 210 so that the rack gear 210 and the pinion gear 220 may be engaged with each other. Pushing support yoke 225 is formed. The end of the rack gear 210 formed on the rack bar 205 is conventionally formed along the flat cross section of the rack bar 205, but formed in a straight line, in the present invention reduces the straight section (A) of the rack gear 210 It has a predetermined inclined surface 212 from the point away from the center at a predetermined distance from both sides to the end of the rack gear 210. If the inclination angle of the inclined surface 212 is too large, the bite ratio with the pinion gear 220 is lowered, so the inclination angle is preferably 5 to 10 ° or less (B).

또한, 이 서포트요크(225)는 원형봉에 상기 랙바(205)를 수용할 수 있는 반원형의 함몰부가 일면에 형성되어 있고, 이 서포트요크(225)의 배면에는 스프링(230)에 의해서 탄성지지된다.In addition, the support yoke 225 has a semi-circular recessed portion for accommodating the rack bar 205 on a round bar, and is elastically supported by a spring 230 on the back surface of the support yoke 225. .

한편, 이 서포트요크(225)는 중공 원통의 일단에 플랜지가 형성된 요크시트(240)의 내부에 수용되고, 이 요크시트(240)의 타단에는 고정너트(245)가 설치된다.On the other hand, the support yoke 225 is accommodated inside the yoke sheet 240 having a flange formed at one end of the hollow cylinder, and the fixing nut 245 is installed at the other end of the yoke sheet 240.

그리고, 이 고정너트(245)의 중앙에는 나사산이 형성된 구멍이 형성되고, 이 구멍에 수용되며 외주면에 나사산이 형성되고 밑면에 스프링을 삽입하기 위한 돌출부가 중앙에 형성된 플러그(235)가 치합되어 스프링(230)을 지지하면서 요크시트(240)를 밀폐시켜준다.In addition, a threaded hole is formed in the center of the fixing nut 245, and a plug 235 formed at the center of the protrusion for accommodating the hole is formed in the outer circumferential surface and the spring is inserted into the bottom of the fixing nut 245. The yoke seat 240 is sealed while supporting the 230.

이로써 스프링(230)에 의해 서포트요크(225)를 랙기어(210)의 배면에 밀착시켜줌으로 랙기어(210)가 피니언기어(220)에 치합된다. 그러므로 운전자가 조향핸들을 회전시킬 때 발생되는 회전력이 조향축을 통하여 피니언 샤프트(215)에 전달되고, 이 피니언 샤프트(215)에 전달된 회전력은 피니언기어(220)를 통하여 랙기어(210)에 전달되며, 랙기어(210)에 전달된 회전력이 랙바(205)를 이송시킴으로 이 랙바(205)에 연결된 타이로드를 통하여 바퀴가 동작된다.Accordingly, the rack gear 210 is engaged with the pinion gear 220 by bringing the support yoke 225 into close contact with the rear surface of the rack gear 210 by the spring 230. Therefore, the rotational force generated when the driver rotates the steering wheel is transmitted to the pinion shaft 215 through the steering shaft, and the rotational force transmitted to the pinion shaft 215 is transmitted to the rack gear 210 through the pinion gear 220. As the rotational force transmitted to the rack gear 210 transfers the rack bar 205, wheels are operated through tie rods connected to the rack bar 205.

전술한 바와 같이, 스티어링 기어의 동력 전달시 타이어로부터 받는 진동과 외력이 랙바에 전달되거나 핸들 조타시 랙기어와 피니언기어 사이에 치 접촉부에서 랙기어와 피니언기거 치간 벌어지려는 분력에 의해 랙바를 배면에서 누르는 요크 스프링의 힘 보다 크게 되면 랙바가 회전하게 되고 벌어지려는 힘이 요크 스프링 보다 작게 되면 원위치로 돌아오게 되는데 랙바가 원위치로 돌와올때 피니언기어와 랙기어가 충돌하면서 충격음이 발생하지만 본 발명에서는 피니언기어와 접촉되는 랙기어의 치단면에 소정의 경사면을 주고 이 경사면을 둥글게 형성하여 랙기어와 피니언기어가 충돌시 둥글게 형성된 면부터 순차적으로 접촉하도록 함으로써 그 충격을 감소시킬 수 있다. 따라서 조향시 래틀 노이즈를 제거할 수 있다.As described above, vibration and external force received from the tire during transmission of power of the steering gear are transmitted to the rack bar, or the rack bar is reared by the force that is to be made between the rack gear and the pinion gear at the tooth contact portion between the rack gear and the pinion gear when steering the steering wheel. If the force is greater than the yoke spring pressed in the rack bar is rotated and if the force to open is less than the yoke spring is returned to the original position. When the rack bar is returned to the original position, the pinion gear and the rack gear collide with the impact sound, but in the present invention The impact can be reduced by giving a predetermined inclined surface to the tooth end surface of the rack gear in contact with the pinion gear and forming the inclined surface roundly so that the rack gear and the pinion gear contact each other sequentially from the rounded surface during the collision. Therefore, rattle noise can be eliminated during steering.

Claims (3)

좌,우방향으로 길게 형성되어 스티어링 기어 전체를 지지하는 구주물인 랙하우징과; 상기 랙하우징에 수용되며 피니언 샤프트의 하측에 형성된 피니언과; 상기 피니언에 치합되며 일측에 랙기어가 형성된 랙바와; 상기 피니언에 상기 랙을 밀착시킬 수 있도록 상기 랙의 배면에 마련되는 서포트요크와; 상기 서포트요크를 탄성지지하는 스프링과; 상기 서포트요크와 스프링을 수용하는 요크시트를 포함하여 이루어진 차량용 조향장치에 있어서,A rack housing which is formed in the left and right directions to support the entire steering gear; A pinion accommodated in the rack housing and formed below the pinion shaft; A rack bar engaged with the pinion and having a rack gear formed at one side thereof; A support yoke provided on a rear surface of the rack to closely contact the rack with the pinion; A spring for elastically supporting the support yoke; In the vehicle steering device comprising a yoke seat for receiving the support yoke and the spring, 상기 랙바에 형성되는 랙기어는 그 중심을 기준으로 폭방향 양측으로 소정거리 직선구간을 유지하다가 랙기어의 끝단까지 소정의 경사면을 이루는 것을 특징으로 하는 조향장치의 래틀 노이즈 방지용 랙.The rack gear formed on the rack bar is a rack for preventing rattle noise of a steering apparatus, wherein the rack gear maintains a predetermined distance in both width directions with respect to its center and forms a predetermined slope to the end of the rack gear. 제1항에 있어서,The method of claim 1, 상기 랙기어에 형성되는 경사면의 경사각은 5 ~ 10°인 것을 특징으로 하는 조향장치의 래틀 방지용 랙.Rattle prevention rack of the steering apparatus, characterized in that the inclination angle of the inclined surface formed on the rack gear is 5 ~ 10 °. 제1항에 있어서,The method of claim 1, 상기 경사면은 소정의 곡률로 라운딩 형성된 것을 특징으로 하는 조향장치의 래틀 노이즈 방지용 랙.The inclined surface is a rack for preventing rattle noise of the steering apparatus, characterized in that the rounding is formed with a predetermined curvature.
KR1020020083025A 2002-12-24 2002-12-24 Rack for rattle noise prevention of steering system KR100816431B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009155514A1 (en) * 2008-06-20 2009-12-23 Saint-Gobain Performance Plastics Corporation Steering yoke

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0958487A (en) 1995-08-29 1997-03-04 Jidosha Kiki Co Ltd Sector gear for steering device and its manufacture
KR20020016978A (en) * 2000-08-28 2002-03-07 밍 루 Steering device for vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009155514A1 (en) * 2008-06-20 2009-12-23 Saint-Gobain Performance Plastics Corporation Steering yoke
US8375818B2 (en) 2008-06-20 2013-02-19 Saint-Gobain Performance Plastics Corporation Steering yoke
US8621950B2 (en) 2008-06-20 2014-01-07 Saint-Gobain Performance Plastics Corporation Steering yoke
US9278707B2 (en) 2008-06-20 2016-03-08 Saint-Gobain Performance Plastics Corporation Steering yoke

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