KR20020053592A - Oil seal use in a shock absorber - Google Patents

Oil seal use in a shock absorber Download PDF

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Publication number
KR20020053592A
KR20020053592A KR1020000083288A KR20000083288A KR20020053592A KR 20020053592 A KR20020053592 A KR 20020053592A KR 1020000083288 A KR1020000083288 A KR 1020000083288A KR 20000083288 A KR20000083288 A KR 20000083288A KR 20020053592 A KR20020053592 A KR 20020053592A
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KR
South Korea
Prior art keywords
oil seal
shock absorber
oil
outer tube
rod guide
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KR1020000083288A
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Korean (ko)
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KR100455211B1 (en
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정철원
권숙
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밍 루
주식회사 만도
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Priority to KR10-2000-0083288A priority Critical patent/KR100455211B1/en
Publication of KR20020053592A publication Critical patent/KR20020053592A/en
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Publication of KR100455211B1 publication Critical patent/KR100455211B1/en

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    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/362—Combination of sealing and guide arrangements for piston rods
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3271—Assembly or repair
    • 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
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F2230/00—Purpose; Design features
    • F16F2230/30—Sealing arrangements

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

PURPOSE: An oil seal of a shock absorber is provided to increase the productivity by improving working efficiency with inserting the oil seal conveniently, and to reduce working process by preventing damage of the oil seal. CONSTITUTION: An oil seal(150) is installed in the upper part of an outer pipe(110) to prevent oil leakage, and a cap(160) is combined with the upper part of the oil seal. A rod guide(140) is placed in the lower part of the oil seal to guide and support a piston rod(130), and an inner pipe(120) is connected to the lower part of the rod guide. The full diameter of the lower part of a body(151) is formed to be less than the bore of the outer pipe, and a compensating protrusion(152) is formed in the lower part of the oil seal. The closed space is formed with contacting the lower part of the body to the rod guide. Working efficiency is improved with inserting the oil seal without press-fitting, and damage of the oil seal is prevented.

Description

쇽 업소버의 오일씰{OIL SEAL USE IN A SHOCK ABSORBER}오일 OIL SEAL USE IN A SHOCK ABSORBER}

본 발명은 쇽 업소버의 오일씰에 관한 것으로서, 더욱 상세하게는 왕복운동되는 피스톤 로드의 외주면에 밀착되는 오일씰의 밀착구조를 개선한 쇽 업소버의 오일씰에 관한 것이다.The present invention relates to an oil seal of a shock absorber, and more particularly, to an oil seal of a shock absorber which has improved an adhesion structure of an oil seal that is in close contact with an outer circumferential surface of a reciprocating piston rod.

일반적으로 쇽 업소버(shock absorber)는 차축과 차체 사이에 설치되어 차량의 주행시 차축이 노면으로부터 받는 진동이나 충격을 흡수하여 승차감을 향상시키는 방진, 완충장치로서, 그 내부는 가스 및 오일 등의 충진물이 채워져 감쇠력을 증대시킬 수 있도록 마련되는데, 통상적으로 오일이 충진된 유압식 쇽 업소버가 많이 사용된다.In general, shock absorbers are installed between the axle and the body to absorb vibrations or shocks received by the axle from the road surface to improve ride comfort. It is filled to increase the damping force, and oil-filled hydraulic shock absorbers are commonly used.

도 1은 이러한 종래의 쇽 업소버 내부를 보인 단면도이다. 이에 도시된 바와 같이 종래의 쇽 업소버(1)는 오일이 가득 채워진 내부관(20)과, 그 외측으로 오일이 절반정도 채워진 외부관(10), 그리고 일단은 내부관(20) 내측으로 삽입되고 타단은 외부관(10) 외측으로 연장된 피스톤 로드(30)가 마련된다.1 is a cross-sectional view showing the inside of such a conventional shock absorber. As shown therein, the conventional shock absorber 1 has an inner tube 20 filled with oil, an outer tube 10 filled with oil to the outside thereof, and one end is inserted into the inner tube 20. The other end is provided with a piston rod 30 extending to the outside of the outer tube (10).

상기 외부관(10)은 밀폐된 중공관으로서 외부 하측에는 미도시된 차축과 연결될 수 있도록 하부 브래킷(11)이 마련되어 있다. 그리고 피스톤 로드(30)가 외부로 연장될 수 있도록 상단면의 중심축은 개구되어 있고, 그 내부에는 오일 누설을 방지할 수 있도록 오일씰(50)과 그 상단에 씌워져 결합되는 캡(60)이 설치된다. 그리고 오일씰(50)의 하부에는 피스톤 로드(30)를 지지 안내하는 로드 가이드(40)가 위치하고, 상기 로드 가이드(40)의 하부로는 내부관(20)이 이어진다.The outer tube 10 is a closed hollow tube is provided with a lower bracket 11 to be connected to the axle not shown in the lower side. And the central axis of the upper surface is open so that the piston rod 30 can extend to the outside, and the cap 60 which is covered with the oil seal 50 and the upper end is installed in the inside so as to prevent oil leakage. . In addition, a lower portion of the oil seal 50 is provided with a rod guide 40 supporting the piston rod 30, and an inner tube 20 is connected to the lower portion of the rod guide 40.

상기 오일씰(50)은 내부관(20)에 저장된 오일의 누설을 방지할 수 있도록 중심축이 중공으로 형성되는 고무재로 설치된다. 이 오일씰(50)의 외측은 원판상으로 마련되는 고정부(51)로서 이 고정부(51)의 내부에는 금속으로 마련된 보강와셔(52)가 설치되어 피스톤 로드(30)의 이동으로 인해 전달되는 하중으로 고정부(51)가 변형되는 것을 방지할 수 있게 된다. 그리고 고정부(51)의 외측 하부에는 돌기부(56)가 형성되어, 상기 돌기부(56)서부터 중심측이 개구되도록 상단이 절곡된 외부관(10)의 내부 외주측과 로드 가이드(40)의 상단 사이에 압입시켜 고정되는 것이다.The oil seal 50 is installed with a rubber material in which the central axis is formed hollow so as to prevent leakage of the oil stored in the inner tube 20. The outer side of the oil seal 50 is a fixed portion 51 provided in a disc shape, the inside of the fixed portion 51 is provided with a reinforcing washer 52 made of metal is transmitted due to the movement of the piston rod (30) It is possible to prevent the fixing portion 51 from being deformed by the load. In addition, a protrusion 56 is formed at an outer lower portion of the fixing part 51, and an inner outer circumferential side of the outer tube 10 and an upper end of the rod guide 40 are bent so that the center side is opened from the protrusion 56. It is press-fitted in between.

또한, 고정부(51)의 내측으로 피스톤 로드(30)와 밀착되는 밀착부(53)가 마련된다. 이 밀착부(53)는 고정부(51)의 내측에서 상, 하측으로 연장되며, 그 중심측은 상, 하측으로 관통된다. 그리고 상, 하측으로 관통된 중심측의 축방향으로 중간 정도와 상, 하측단은 피스톤 로드(30)와 밀착되고, 그 사이는 피스톤 로드(30)와 소정간격 이격되도록 마련된다. 즉, 밀착부(53)의 내부면은 부분적으로 피스톤 로드(30)와 밀착되는 것이다. 또 밀착부(53)의 상, 하측단에는 밀착부(53)를 피스톤 로드(30)측으로 지지하는 금속재의 압착링(55)이 마련된다. 이 압착링(55)은 원형의 금속링으로서, 밀착부(53)의 상, 하측단에 형성된 압착홈(54)의 내부에 삽입되어 이 압착홈(54)의 외부에 피스톤 로드(30)와 밀착되는 부분을 지지하게 된다.In addition, a close contact portion 53 in close contact with the piston rod 30 is provided inside the fixing portion 51. The close contact portion 53 extends upward and downward from the inside of the fixing portion 51, and the center side thereof penetrates upward and downward. The intermediate, upper and lower ends are in close contact with the piston rod 30 in the axial direction of the center side penetrated upward and downward, and are provided to be spaced apart from the piston rod 30 by a predetermined interval. That is, the inner surface of the close contact portion 53 is in close contact with the piston rod 30. In addition, upper and lower ends of the contact portion 53 are provided with a metal crimping ring 55 for supporting the contact portion 53 toward the piston rod 30. The pressing ring 55 is a circular metal ring, which is inserted into the pressing groove 54 formed at the upper and lower ends of the contact portion 53 to form the piston rod 30 and the outside of the pressing groove 54. Support the part to be in close contact.

그러나, 이와 같은 종래의 쇽 업소버의 오일씰은, 그 하부면의 돌기부(56)가 외부관(10)의 내경부보다 크게 되어 있어서 오일씰(50)의 압입 조립시, 그 조립과정 자체가 작업성이 떨어지는 문제점이 있기도 하지만, 상기 강제 압입시에 오일씰(50)이 손상되어 불량품이 발생되어 전체적으로 쇽 업소버(1)에 치명적인 불량품을 발생시킨다. 그리고 상기와 같은 불량품의 생산 방지를 위하여 오일이 누유되는지의 추가 확인 공정이 필요한 문제점이 있었다.However, in the oil seal of the conventional shock absorber, the protrusion 56 of the lower surface thereof is larger than the inner diameter of the outer tube 10 so that the assembling process itself is operable when press-fitting the oil seal 50. Although there is a problem in the fall, the oil seal 50 is damaged during the forced indentation, a defective product is generated, causing a fatal defective product in the shock absorber (1) as a whole. And in order to prevent the production of defective products as described above, there was a problem that the additional confirmation process of oil leakage.

본 발명은 상술한 바와 같은 종래의 문제점을 해결하기 위한 것으로서, 오일씰의 하부 외주면을 외부관의 내경부와 동일하게 제작함으로서, 오일씰 조립시 압입이 아닌 삽입방식으로 작업성 향상과 오일씰의 손상을 방지하는 쇽 업소버의 오일씰을 제공하는데 그 목적이 있다.The present invention is to solve the conventional problems as described above, by making the lower outer peripheral surface of the oil seal the same as the inner diameter of the outer tube, to improve the workability and prevent damage to the oil seal by the insertion method, not press-fitting during oil seal assembly The purpose is to provide an oil seal of shock absorbers.

상기의 목적을 달성하기 위하여 본 발명은, 로드 가이드 상부의 외부관에 설치되며, 몸체 내주면에 피스톤 로드의 외주면과 밀착되어 오일의 누유를 방지하는 밀착부를 구비하는 쇽 업소버의 오일씰에 있어서; 상기 몸체의 하부 외주면이 상기 외부관의 내경부에 삽입방식으로 조립될 수 있도록 상기 외부관의 내경과 같거나 작게 형성되고, 상기 몸체의 하부에 상기 로드 가이드와 접촉되어 밀폐공간을 형성하는 것을 특징으로 하는 쇽 업소버의 오일씰을 제공한다.In order to achieve the above object, the present invention, in the oil seal of the shock absorber is installed in the outer tube of the upper rod guide, the body inner circumferential surface is in close contact with the outer circumferential surface of the piston rod having a close contact to prevent leakage of oil; The lower outer circumferential surface of the body is formed to be the same as or smaller than the inner diameter of the outer tube to be assembled in the inner diameter portion of the outer tube, the lower portion of the body in contact with the rod guide to form a closed space It provides oil seal of shock absorber.

도 1은 종래 쇽 업소버의 오일씰을 도시한 단면도.1 is a cross-sectional view showing an oil seal of a conventional shock absorber.

도 2는 본 발명에 따른 쇽 업소버의 오일씰을 도시한 단면도.Figure 2 is a sectional view showing the oil seal of the shock absorber according to the present invention.

＜도면의 주요부분에 대한 부호의 설명＞<Description of the code | symbol about the principal part of drawing>

100 : 쇽 업소버 110 : 외부관100: shock absorber 110: outer tube

120 : 내부관 130 : 피스톤 로드120: inner tube 130: piston rod

140 : 로드 가이드 150 : 오일씰140: rod guide 150: oil seal

151 : 몸체 152 : 보상돌기151: body 152: compensation protrusion

160 : 캡160: cap

이하 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시 예를 상세하게 설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 쇽 업소버의 오일씰을 도시한 단면도이다.2 is a cross-sectional view showing the oil seal of the shock absorber according to the present invention.

본 발명에 따른 쇽 업소버의 오일씰은, 도 2에 도시되어 있는 바와 같이, 차량용 쇽 업소버(100)는, 오일이 가득 채워진 내부관(120)과 이 내부관(120)의 외측으로는 오일이 절반정도 채워진 외부관(110), 그리고 일단은 내부관(120)의 내측으로 삽입되어 상, 하 이동 가능하게 설치되고 타단은 외측으로 연장되는 피스톤 로드(150)가 마련된다.The oil seal of the shock absorber according to the present invention, as shown in Figure 2, the vehicle shock absorber 100, the oil is filled in the inner tube 120 and the outside of the inner tube 120 is half The outer tube 110 is filled with a degree, and one end is inserted into the inner tube 120 to be installed to move up and down, and the other end is provided with a piston rod 150 extending outward.

상기 외부관(110)의 상단 내부에는 오일 누설을 방지할 수 있도록 오일씰(150)과 그 상단에 씌워져 결합되는 캡(160)이 설치된다. 그리고 오일씰(150)의 하부에는 피스톤 로드(130)를 지지 안내하는 로드 가이드(140)가 위치하고, 상기 로드 가이드(140)의 하부로는 내부관(120)이 이어진다.An upper end of the outer tube 110 is provided with a cap 160 that is covered and coupled to the oil seal 150 and its upper end to prevent oil leakage. A rod guide 140 supporting the piston rod 130 is positioned below the oil seal 150, and an inner tube 120 is connected to the lower portion of the rod guide 140.

본 발명에 따라 상기 오일씰(150)의 몸체(151) 하부 외주면의 외경을 상기 외부관(110)의 내경과 동등하게 혹은 그 보다 작게 형성한다. 그리고 그 하단 외주면의 내측으로는 보상돌기(152)가 형성된다.According to the present invention, the outer diameter of the lower outer circumferential surface of the body 151 of the oil seal 150 is formed to be equal to or smaller than the inner diameter of the outer tube 110. And the compensation protrusion 152 is formed inside the outer peripheral surface of the lower end.

이와 같이 구성된 본 발명에 따른 쇽 업소버의 오일씰의 조립은 다음과 같다.Assembly of the oil seal of the shock absorber according to the present invention configured as described above is as follows.

상기 외부관(110)의 내경과 동등하게 혹은 그 보다 작게 형성한 몸체(151)의 하부 외주면부터 삽입하여 로드 가이드(140)의 상부에 설치한다. 그리고 설치된 몸체(151)에는 외부관(110)의 끝단을 벤딩하여 압입 고정시키며 그 상부에 캡(160)이 씌워진다.Inserted from the lower outer peripheral surface of the body 151 formed equal to or smaller than the inner diameter of the outer tube 110 is installed on the top of the rod guide 140. Then, the installed body 151 is bent the end of the outer tube 110 by press-fitting and the cap 160 is covered thereon.

그리고 상기와 같이 설치된 오일씰(150)은, 상기 외부관(110)의 내경보다 줄어든 하부 외주면으로 인하여 상기 몸체(151)의 하부와, 로드 가이드(140)의 상부와, 그들 외부관(110) 사이에서 밀폐되었던 공간이 상대적으로 늘어나게 되어서 이를 보상코자 그 내측면에 상응하는 보상돌기(152)를 형성하였다.And the oil seal 150 installed as described above, between the lower portion of the body 151, the upper portion of the rod guide 140, and their outer tube 110 due to the lower outer peripheral surface reduced than the inner diameter of the outer tube 110 In the space that was closed in the relatively increased to compensate for this to form a compensation protrusion 152 corresponding to the inner surface.

이로서, 오일씰(150)의 조립시 압입이 아닌 삽입으로 이루어져 작업성 향상과 오일씰의 손상을 방지할 수 있게 된다.As a result, when the assembly of the oil seal 150 is made by inserting rather than press-fitted, it is possible to improve workability and prevent damage to the oil seal.

이상에서는 본 발명을 특정의 바람직한 실시 예에 대하여 도시하고 또한 설명하였으나, 본 발명은 상술한 실시 예에 한정되지 아니하며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하 청구범위에 기재된 본 발명의 요지를 벗어남이 없이 다양한 변경실시가 가능할 것이다.Although the present invention has been illustrated and described with respect to certain preferred embodiments, the present invention is not limited to the above-described embodiments, and a person skilled in the art to which the present invention pertains has the present invention set forth in the claims below. Various modifications may be made without departing from the spirit of the invention.

이상에서 설명한 바와 같이 본 발명 쇽 업소버의 오일씰에 의하면, 오일씰의 하부 외주면을 외부관의 내경부와 동일하게 제작함으로서, 오일씰 조립시 압입이 아닌 삽입방식으로 작업이 수월해져 생산성 향상을 가져오는 효과가 있으며, 오일씰의 손상을 방지하여 불량 방지 및 오일 누유를 확인하는 추가 확인 공정을 생략하는 효과가 있다.As described above, according to the oil seal of the shock absorber of the present invention, the lower outer peripheral surface of the oil seal is manufactured in the same manner as the inner diameter of the outer tube, so that the work is facilitated by the insertion method rather than the press-fitting when the oil seal is assembled. In addition, there is an effect of avoiding the damage of the oil seal to omit the additional verification process to prevent defects and check the oil leakage.

Claims (1)

로드 가이드 상부의 외부관에 설치되며, 몸체 내주면에 피스톤 로드의 외주면과 밀착되어 오일의 누유를 방지하는 밀착부를 구비하는 쇽 업소버의 오일씰에 있어서;In the oil seal of the shock absorber is installed in the outer tube of the upper rod guide, the body inner circumferential surface is in close contact with the outer circumferential surface of the piston rod to have a close contact to prevent leakage of oil; 상기 몸체의 하부 외주면이 상기 외부관의 내경부에 삽입방식으로 조립될 수 있도록 상기 외부관의 내경과 같거나 작게 형성되고, 상기 몸체의 하부에 상기 로드 가이드와 접촉되어 밀폐공간을 형성하는 것을 특징으로 하는 쇽 업소버의 오일씰.The lower outer circumferential surface of the body is formed to be the same as or smaller than the inner diameter of the outer tube to be assembled in the inner diameter portion of the outer tube, the lower portion of the body in contact with the rod guide to form a closed space 씰 Absorber oil seal.
KR10-2000-0083288A 2000-12-27 2000-12-27 Oil seal use in a shock absorber KR100455211B1 (en)

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Cited By (2)

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KR20060056441A (en) * 2004-11-19 2006-05-24 주식회사 만도 Rod guide of shock absorber
CN102927192A (en) * 2012-10-31 2013-02-13 芜湖市顺昌汽车配件有限公司 Dustproof device of automobile damper

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KR20170006578A (en) 2015-07-08 2017-01-18 (주)보림 Shock absorber piston rod for car
KR20170006564A (en) 2015-07-08 2017-01-18 (주)보림 Manufacturing methods of shock absorber piston rod for car
KR20170006569A (en) 2015-07-08 2017-01-18 (주)보림 Shock absorber piston rod for car
KR20170006567A (en) 2015-07-08 2017-01-18 (주)보림 Shock absorber piston rod for car
KR20170006575A (en) 2015-07-08 2017-01-18 (주)보림 Shock absorber piston rod for car
KR101726712B1 (en) 2015-07-08 2017-04-13 (주)보림 Shock absorber piston rod for car
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JPH09126266A (en) * 1995-10-31 1997-05-13 Toyota Motor Corp Oil seal structure of hydraulic shock absorber and gas of hydraulic damper
JPH1113816A (en) * 1997-06-27 1999-01-22 Kayaba Ind Co Ltd Gas sealing device
KR20000015879U (en) * 1999-01-19 2000-08-16 밍 루 Shock absorber for vehicle
KR20000016337U (en) * 1999-01-29 2000-08-25 밍 루 Shock absorber for vehicle

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Publication number Priority date Publication date Assignee Title
KR20060056441A (en) * 2004-11-19 2006-05-24 주식회사 만도 Rod guide of shock absorber
CN102927192A (en) * 2012-10-31 2013-02-13 芜湖市顺昌汽车配件有限公司 Dustproof device of automobile damper

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