KR20010095522A - Oil sealing structure of rack bar for steering system - Google Patents

Oil sealing structure of rack bar for steering system Download PDF

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Publication number
KR20010095522A
KR20010095522A KR1020000018653A KR20000018653A KR20010095522A KR 20010095522 A KR20010095522 A KR 20010095522A KR 1020000018653 A KR1020000018653 A KR 1020000018653A KR 20000018653 A KR20000018653 A KR 20000018653A KR 20010095522 A KR20010095522 A KR 20010095522A
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South Korea
Prior art keywords
rack
mold
oil
rack bar
sealing structure
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KR1020000018653A
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Korean (ko)
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KR100349394B1 (en
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정을고
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밍 루
주식회사 만도
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    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/16—Sealing arrangements on wings or parts co-operating with the wings

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sealing Devices (AREA)

Abstract

PURPOSE: Oil sealing structure of a rack bar for a steering system is provided to improve sealing performance between a mold and a rack bar and to efficiently prevent leakage of oil from a cylinder of a rack housing. CONSTITUTION: Oil sealing structure for a rack bar in a steering system comprises a mold(1) mounted between a rack housing(10) and a rock bar(30); a cylinder(11) mounted in the rack housing; an oil seal(3) installed on an end portion of the mold toward the cylinder; a tension hole(1a) repulsing the end portion of the mold toward the rack bar and the rack housing; and an O-ring(2) inserted between the rack housing and a peripheral face of the mold. The oil contained in the cylinder is not discharged by the oil seal mounted between the mold and the rack bar while moving the rack bar toward a shaft direction. Thereby, the oil sealing structure of a rack bar for a steering system efficiently prevents leakage of the oil from the cylinder of the rack housing. Moreover, the oil sealing structure of the rack bar improves assembly by easily installing the mold and the oil seal.

Description

자동차 스티어링 장치용 랙바의 오일씰링구조{OIL SEALING STRUCTURE OF RACK BAR FOR STEERING SYSTEM}Oil sealing structure of rack bar for vehicle steering system {OIL SEALING STRUCTURE OF RACK BAR FOR STEERING SYSTEM}

본 발명은 스티어링 장치용 랙바의 오일씰링구조에 관한 것으로, 더욱 상세하게는 자동차 스티어링 장치의 랙과 피니언 기어에 있어서 랙바와 랙하우징 사이에 개재되어 랙하우징의 실린더로부터 오일이 랙바를 따라 실린더 외부로 누출되는 것을 효과적으로 방지할 수 있도록 하는 자동차 스티어링 장치용 랙바의 오일씰링구조에 관한 것이다.The present invention relates to an oil sealing structure of a rack bar for a steering device, and more particularly, in the rack and pinion gear of an automobile steering device, interposed between the rack bar and the rack housing and oil from the cylinder of the rack housing to the outside of the cylinder along the rack bar. The present invention relates to an oil sealing structure of a rack bar for a vehicle steering device that effectively prevents leakage.

통상적인 자동차의 스티어링 장치는 조작기구와 스티어링 기어 및 링크기구로 이루어짐으로써 운전자가 자동차의 진행방향을 임의로 변경할 수 있게 된다.Conventional vehicle steering apparatus is composed of the operating mechanism and the steering gear and link mechanisms so that the driver can arbitrarily change the driving direction of the vehicle.

특히, 상기 스티어링 기어는 랙과 피니언 기어로 구성되는 것이 일반적인데, 이러한 랙과 피니언 기어의 작동은 매뉴얼 방식 또는 파워 어시스트 방식에 의하여 이루어지며, 이 가운데 파워 어시스트 방식의 경우 대체로 토션바와 유체(오일)의 작용에 의하여 조향력의 증대를 꾀하게 된다.In particular, the steering gear is generally composed of a rack and a pinion gear, the operation of the rack and pinion gear is performed by a manual method or a power assist method, of which the power assist method is generally a torsion bar and fluid (oil) By the action of the will to increase the steering power.

즉, 도 1에 랙바와 랙하우징이 도시되어 있는데, 작동오일이 채워지는 실린더(11)를 형성하는 랙하우징(10)이 구비되어 벨로우즈형 튜브(20)와 함께 랙바(30)를 내장하고 있으며, 상기 랙하우징(10)의 양단 부근에는 토션바와 인풋샤프트 등을 작동시키기 위한 밸브바디(도시되어 있지 않음)와 연통되는 한 쌍의 유압포트(40,50)가 각각 장착되어 있다.That is, the rack bar and the rack housing is shown in Figure 1, the rack housing 10 is formed to form a cylinder (11) filled with the operating oil is built in the rack bar 30 together with the bellows-type tube (20) In the vicinity of both ends of the rack housing 10, a pair of hydraulic ports 40 and 50 communicating with a valve body (not shown) for operating a torsion bar and an input shaft is mounted.

따라서, 상기 유압포트(40,50)를 통해 드나드는 작동오일의 작용에 의하여 상기 랙하우징(10)내의 랙바(30)가 도면상에서 좌우로 이동할 때 조향력을 증대시키게 된다.Therefore, the steering force is increased when the rack bar 30 in the rack housing 10 moves left and right in the drawing by the action of the operating oil coming in and out of the hydraulic ports 40 and 50.

한편, 상기 랙하우징(10)의 실린더(11) 양단쪽에는 실린더(11)내의 오일이 실린더(11) 밖으로 누출되지 않도록 하기 위한 오일씰링장치가 구비되어 있는데, 이 오일씰링장치의 구조는 도면에 나타나 있는 바와 같이, 랙하우징(10)의 실린더(11) 끝부분에 랙바(30)를 감싸면서 랙바(30)와 랙하우징(10)의 사이에 개재되는 플라스틱제의 몰드(1)가 구비되고, 이 몰드(1)의 외주부 일부분에는 몰드(1)와 랙하우징(10)간의 갭을 통해 오일이 누출되는 것을 방지하기 위한 오링(2)이 끼워져 있으며, 랙하우징(10)의 끝부분을 향하고 있는 몰드(1)의 끝부분 내주면과 랙바(30)의 사이에는 랙바(30)가 이동할 때 몰드(1)와 랙바(30)간의 갭으로 오일이 누출되지 않도록 하기 위한 오일씰(3)이 개재되어 있다.On the other hand, both ends of the cylinder 11 of the rack housing 10 is provided with an oil sealing device for preventing the oil in the cylinder 11 from leaking out of the cylinder 11, the structure of the oil sealing device is shown in the drawings As shown, a plastic mold 1 interposed between the rack bar 30 and the rack housing 10 while wrapping the rack bar 30 at the end of the cylinder 11 of the rack housing 10 is provided. Part of the outer peripheral portion of the mold (1) is fitted with an O-ring (2) for preventing oil from leaking through the gap between the mold (1) and the rack housing 10, facing the end of the rack housing 10 Between the inner circumferential surface of the end of the mold 1 and the rack bar 30, an oil seal 3 is provided to prevent oil from leaking into the gap between the mold 1 and the rack bar 30 when the rack bar 30 moves. have.

그런데, 전술한 종래의 오일씰링구조에서는 오일씰이 랙하우징의 끝부분을 향한 몰드의 끝부분에 위치하고 있기 때문에 몰드와 랙바의 간극을 타고 유입되는 오일량이 많아질 ?? 오일의 일부가 랙하우징의 실린더 밖으로 누출되어 버리는 문제점이 있다.However, in the above-described conventional oil sealing structure, since the oil seal is located at the end of the mold facing the end of the rack housing, the amount of oil flowing through the gap between the mold and the rack bar increases. Some of the oil leaks out of the cylinder of the rack housing.

또한, 종래의 오일씰링구조에서는 랙하우징과 랙바의 사이에 몰드를 먼저 장착한 뒤, 이 몰드와 랙바 사이에 오일씰을 장착함에 따라 작업이 용이하게 이루어지지 못하는 문제점도 있다.In addition, in the conventional oil sealing structure, after mounting the mold first between the rack housing and the rack bar, there is also a problem that the operation is not easily made by mounting the oil seal between the mold and the rack bar.

본 발명은 위와 같은 문제점을 해소하기 위한 것으로, 오일씰링장치의 몰드와 랙바 사이의 씰링기능을 향상시킴으로써 랙하우징의 실린더로부터 오일이 외부로 누출되는 것을 효과적으로 방지할 수 있는 자동차 스티어링 장치용 랙바의 오일씰링구조를 제공하는 데에 목적이 있다.The present invention is to solve the above problems, by improving the sealing function between the mold and the rack bar of the oil sealing device, the oil of the rack bar for the automotive steering device that can effectively prevent the leakage of oil from the cylinder of the rack housing to the outside The purpose is to provide a sealing structure.

본 발명은 또한, 몰드와 오일씰의 장착작업이 용이하게 이루어질 수 있는 조립성이 향상된 자동차 스티어링 장치용 랙바의 오일씰링구조를 제공함에 목적이 있다.It is another object of the present invention to provide an oil sealing structure of a rack bar for an automobile steering apparatus having improved assembly property, in which a mounting operation of a mold and an oil seal can be easily performed.

도 1은 종래의 오일씰링구조가 적용된 랙바와 랙하우징을 나타낸 단면도,1 is a cross-sectional view showing a rack bar and a rack housing to which a conventional oil sealing structure is applied;

도 2는 본 발명에 따른 오일씰링구조가 적용된 도 1의 대응 단면도.2 is a cross-sectional view of FIG. 1 to which an oil sealing structure according to the present invention is applied.

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

1 : 몰드 1a : 텐션홀1: Mold 1a: Tension hole

2 : 오링 3 : 오일씰2: O-ring 3: Oil seal

위와 같은 목적을 달성하기 위한 본 발명은, 몰드와 오일씰을 구비하여 랙하우징과 랙바의 사이에 개재됨으로써 랙하우징의 실린더내에 있는 오일이 외부로 누출되는 것을 방지하는 자동차 스티어링 장치용 랙바의 오일씰링구조에 있어서, 상기 오일씰이 상기 실린더쪽을 향한 몰드의 끝부분에 장착되는 것을 특징으로 한다.The present invention for achieving the above object, the oil sealing structure of the rack bar for a vehicle steering device to prevent the leakage of oil in the cylinder of the rack housing to the outside by being interposed between the rack housing and the rack bar having a mold and an oil seal In the oil seal is characterized in that mounted to the end of the mold toward the cylinder.

본 발명은 또한, 상기 몰드의 오일씰과 접하는 부위에, 몰드의 단부가 상기 랙하우징과 랙바쪽으로 탄발되도록 하는 텐션홀이 형성된 것을 특징으로 한다.In another aspect, the present invention is characterized in that a tension hole is formed in a portion in contact with the oil seal of the mold so that the end of the mold is elastically directed toward the rack housing and the rack bar.

본 발명을 또한, 상기 텐션홀이 형성된 몰드의 외주면과 랙하우징의 사이에 오링이 개재된 것을 특징으로 한다.The present invention is also characterized in that the O-ring is interposed between the outer circumferential surface of the mold formed with the tension hole and the rack housing.

이하 본 발명의 바람직한 실시예를 첨부된 도면을 참조로하여 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

첨부도면 도 2는 본 발명에 따른 오일씰링구조가 적용된 도 1의 대응 단면도로서, 도 1과 동일한 부위에 대해서는 동일한 도면부호를 부여하며 그 상세한 설명은 생략한다.2 is a corresponding cross-sectional view of FIG. 1 to which an oil sealing structure according to the present invention is applied, and the same reference numerals are given to the same parts as in FIG. 1, and detailed description thereof will be omitted.

본 발명은 몰드(1)와 오일씰(3)을 구비하여 랙하우징(10)과 랙바(30)의 사이에 개재됨으로써 랙하우징(10)의 실린더(11)내에 있는 오일이 외부로 누출되는 것을 방지하는 자동차 스티어링 장치용 랙바의 오일씰링구조에 있어서, 상기 오일씰(3)이 상기 실린더(11)쪽을 향한 몰드(1)의 끝부분에 장착되고, 상기 몰드(1)의 오일씰(3)과 접하는 부위에, 몰드(1)의 단부가 상기 랙하우징(10)과 랙바(30)쪽으로 탄발되도록 하는 텐션홀(1a)이 형성되며, 상기 텐션홀(1a)이 형성된 몰드(1)의 외주면과 랙하우징(10)의 사이에는 오링(2)이 개재된 구조로 이루어진다.The present invention is provided between the mold housing (1) and the oil seal (3) between the rack housing 10 and the rack bar 30 to prevent the oil in the cylinder 11 of the rack housing 10 to leak to the outside. In the oil sealing structure of the rack bar for a vehicle steering apparatus, the oil seal 3 is mounted to the end of the mold 1 facing the cylinder 11, and in contact with the oil seal 3 of the mold 1 At the site, a tension hole 1a is formed so that the ends of the mold 1 are elastically directed toward the rack housing 10 and the rack bar 30, and the outer peripheral surface and the rack of the mold 1 having the tension hole 1a formed thereon. O-ring (2) is interposed between the housing 10 is made of a structure.

이와 같이 이루어지는 본 발명에 따른 오일씰링구조는, 랙하우징(10)과 랙바(30) 사이에 장착하고자 할 때, 먼저 몰드(1)의 선단에 오일씰을 안착시키고, 몰드(1)의 외주면에는 오링(2)을 감은 상태에서 랙하우징(10)의 개방부로부터 한 번에 삽입하여 장착하면 되므로 작업이 간단하게 수행된다.When the oil sealing structure according to the present invention made as described above is intended to be mounted between the rack housing 10 and the rack bar 30, the oil seal is first seated on the tip of the mold 1, and the O-ring is formed on the outer circumferential surface of the mold 1. In the wound state (2), the operation is simply performed because it is inserted and mounted at a time from the opening of the rack housing 10.

이렇게 장착된 오일씰링구조에서, 상기 랙바(30)가 축방향으로 이동할 때에, 랙하우징(10)이 형성하고 있는 실린더(11)내의 오일이 랙하우징(10)에 장착되어 있는 몰드(1)와 랙바(30) 사이에 개재된 오일씰(3)에 의하여 외부로 누출되지 않고 일차적으로 차단이 이루어지게 되며, 이 때 상기 몰드(1)에 형성되어 있는 텐션홀(1a)의 탄발력에 의해 몰드(1)의 외주면이 랙하우징(10)과 랙바(30)에 밀착됨으로써 씰링효과는 더욱 배가되는 한편, 몰드(1)의 외주면에는 오링(2)이 장착된 채로 랙하우징(10)과 밀착하고 있기 때문에 실린더밖으로의 오일의 누출은 전혀 발생하지 않게 된다.In the oil sealing structure thus mounted, when the rack bar 30 moves in the axial direction, the oil in the cylinder 11 formed by the rack housing 10 and the mold 1 mounted on the rack housing 10 and The oil seal 3 interposed between the rack bars 30 is primarily prevented from leaking to the outside, and at this time, the mold is formed by the elastic force of the tension hole 1a formed in the mold 1. The outer circumferential surface of 1) is in close contact with the rack housing 10 and the rack bar 30 to further double the sealing effect, while the outer circumferential surface of the mold 1 is in close contact with the rack housing 10 with the O-ring 2 mounted thereon. As a result, no oil leaks out of the cylinder.

이상에서 설명한 바와 같이, 본 발명에 따른 자동차 스티어링 장치용 랙바의 오일씰링구조는, 몰드와 랙바 사이의 씰링기능을 향상시킴으로써 랙하우징의 실린더로부터 오일이 외부로 누출되는 것을 효과적으로 방지할 수 있게 되며, 몰드와 오일씰의 장착작업이 용이하게 이루어짐으로써 조립성이 향상되는 효과도 나타내게 된다.As described above, the oil sealing structure of the rack bar for a vehicle steering apparatus according to the present invention, by effectively improving the sealing function between the mold and the rack bar, it is possible to effectively prevent the leakage of oil from the cylinder of the rack housing to the outside, Since the mounting work of the mold and the oil seal is made easily, the assembly performance is also improved.

Claims (3)

몰드(1)와 오일씰(3)을 구비하여 랙하우징(10)과 랙바(30)의 사이에 개재됨으로써 랙하우징(10)의 실린더(11)내에 있는 오일이 외부로 누출되는 것을 방지하는 자동차 스티어링 장치용 랙바의 오일씰링구조에 있어서,An automobile steering having a mold 1 and an oil seal 3 interposed between the rack housing 10 and the rack bar 30 to prevent oil in the cylinder 11 of the rack housing 10 from leaking to the outside. In the oil sealing structure of the rack bar for the device, 상기 오일씰(3)이 상기 실린더(11)쪽을 향한 몰드(1)의 끝부분에 장착되는 것을 특징으로 하는 자동차 스티어링 장치용 랙바의 오일씰링구조.The oil sealing structure of the rack bar for a vehicle steering apparatus, characterized in that the oil seal (3) is mounted at the end of the mold (1) toward the cylinder (11). 제1항에 있어서, 상기 몰드(1)의 오일씰(3)과 접하는 부위에, 몰드(1)의 단부가 상기 랙하우징(10)과 랙바(30)쪽으로 탄발되도록 하는 텐션홀(1a)이 형성된 것을 특징으로 하는 자동차 스티어링 장치용 랙바의 오일씰링구조.The tension hole 1a of claim 1, wherein an end portion of the mold 1 is tensioned toward the rack housing 10 and the rack bar 30 at a portion in contact with the oil seal 3 of the mold 1. Oil sealing structure of the rack bar for the car steering apparatus. 제2항에 있어서, 상기 텐션홀(1a)이 형성된 몰드(1)의 외주면과 랙하우징(10)의 사이에 오링(2)이 개재된 것을 특징으로 하는 자동차 스티어링 장치용 랙바의 오일씰링구조.The oil sealing structure of claim 2, wherein an o-ring (2) is interposed between the outer circumferential surface of the mold (1) in which the tension hole (1a) is formed and the rack housing (10).
KR1020000018653A 2000-04-10 2000-04-10 Oil sealing structure of rack bar for steering system KR100349394B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738433B1 (en) * 2003-09-06 2007-07-11 주식회사 만도 A Bellows assembly construction of a Steering system for an Automobile

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JPH01171775U (en) * 1988-05-17 1989-12-05
JP2566042Y2 (en) * 1991-12-14 1998-03-25 光洋精工株式会社 Rack and pinion steering system
JP2551966Y2 (en) * 1992-01-13 1997-10-27 株式会社ユニシアジェックス Power steering device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100738433B1 (en) * 2003-09-06 2007-07-11 주식회사 만도 A Bellows assembly construction of a Steering system for an Automobile

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