KR20020094173A - Piston rod stopper use in shock absorber - Google Patents

Piston rod stopper use in shock absorber Download PDF

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Publication number
KR20020094173A
KR20020094173A KR1020010032743A KR20010032743A KR20020094173A KR 20020094173 A KR20020094173 A KR 20020094173A KR 1020010032743 A KR1020010032743 A KR 1020010032743A KR 20010032743 A KR20010032743 A KR 20010032743A KR 20020094173 A KR20020094173 A KR 20020094173A
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KR
South Korea
Prior art keywords
piston rod
shock absorber
stopper
piston
cylindrical tube
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KR1020010032743A
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Korean (ko)
Inventor
류기팔
Original Assignee
주식회사 만도
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Priority to KR1020010032743A priority Critical patent/KR20020094173A/en
Publication of KR20020094173A publication Critical patent/KR20020094173A/en

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Classifications

    • 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
    • F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
    • 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
    • F16F9/3207—Constructional features
    • F16F9/3221—Constructional features of 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
    • F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
    • F16F9/512—Means responsive to load action, i.e. static load on the damper or dynamic fluid pressure changes in the damper, e.g. due to changes in velocity
    • F16F9/5126—Piston, or piston-like valve elements

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

Abstract

PURPOSE: A piston rod stopper for a shock absorber is provided to simplify the assembling process, and to cut down manufacturing expenses by installing a stopper for restricting stroke of the piston rod in the end of the tube with simple structure. CONSTITUTION: The length of a piston rod(5) is shortened relatively to the entire length of a shock absorber, and a piston rod stopper is formed in a cylindrical tube(2). A piston valve(10) is slid in the cylindrical tube, and the downward movement of the piston valve is restricted. Plural protrusions(30) are formed in the bore of the cylindrical tube through press process to prevent the piston valve from being moved downward. The stroke of the piston rod is decided by restricting the downward movement of the piston rod with the protrusions. Assembling process and manufacturing expenses are reduced by simplifying the structure of the stopper.

Description

쇽 업소버의 피스톤 로드 스토퍼{PISTON ROD STOPPER USE IN SHOCK ABSORBER}피스톤 Piston rod stopper of absorber {PISTON ROD STOPPER USE IN SHOCK ABSORBER}

본 발명은 쇽 업소버에 관한 것으로서, 더욱 상세하게는 튜브 내에 스토퍼를 형성하여 피스톤 로드의 스트로크를 조절할 수 있는 쇽 업소버에 관한 것이다.The present invention relates to a shock absorber, and more particularly to a shock absorber that can adjust the stroke of the piston rod by forming a stopper in the tube.

일반적으로 쇽 업소버(shock absorber)는 양단부가 차체와 바퀴에 고정되어 주행 중 노면과 접촉하는 바퀴로부터 전달되는 각종 진동이나 충격을 흡수하여 차체에 전달되지 않도록 함으로써 승차감 및 주행 안정성을 향상시키는 기능을 수행한다.In general, shock absorbers perform shock absorbing functions to improve ride comfort and driving stability by absorbing various vibrations or shocks transmitted from the wheels that are fixed to the vehicle body and the wheels, and transmitting them to the vehicle body. do.

도 1은 종래 쇽 업소버의 내부를 도시한 단면도로서, 원통형 튜브(2)의 내부를 인장챔버(3)와 압축챔버(4)로 분리하는 피스톤 밸브(10)와, 이 피스톤 밸브(10)를 직선 왕복 운동시키는 피스톤 로드(5)와, 원통형 튜브(2)의 하부에 설치되는 바디 밸브(20)를 구비한다.1 is a cross-sectional view showing the inside of a conventional shock absorber. The piston valve 10 separating the inside of the cylindrical tube 2 into the tension chamber 3 and the compression chamber 4, and the piston valve 10 A piston rod 5 for linear reciprocating motion and a body valve 20 provided below the cylindrical tube 2 are provided.

그리고 피스톤 밸브(10)에 압축 유로 및 인장 유로(미도시됨)가 소정간격을 두고 다수 형성되어 있고, 상면에는 압축 유로를 개폐시키는 구조를 갖추고 있으며, 하면에는 인장 유로를 개폐시키는 구조를 갖추고 있다.In addition, a plurality of compression passages and tension passages (not shown) are formed in the piston valve 10 at predetermined intervals, and the upper surface has a structure for opening and closing the compression passage, and the lower surface has a structure for opening and closing the tension passage. .

그리고 바디 밸브(20)에도 인장 및 압축시 개폐되는 유로(22)가 소정간격을 두고 다수 형성되어 있고, 상면에는 유로(22)를 개폐시키는 구조가 마련되어 있다.In addition, the body valve 20 has a plurality of flow passages 22 that are opened and closed during tension and compression at predetermined intervals, and a structure for opening and closing the flow passage 22 is provided on the upper surface.

이와 같이 구성된 종래 쇽 업소버는 피스톤 밸브(10)가 직선 왕복 운동하게 되면, 인장챔버(3)와 압축챔버(4) 사이에 압력 차가 발생하게 되고, 이 압력 차에 의하여 인장챔버(3)와 압축챔버(4) 내부에 충진된 유체가 피스톤 밸브(10)와 바디 밸브(20)에 형성된 유로를 통해 순환 이동하는 과정을 통하여 일정한 감쇠력을 발생시키게 된다.In the conventional shock absorber configured as described above, when the piston valve 10 is linearly reciprocated, a pressure difference is generated between the tension chamber 3 and the compression chamber 4, and the pressure difference between the tension chamber 3 and the compression chamber 4 is compressed. The fluid filled in the chamber 4 generates a constant damping force through a process of circulating through the flow path formed in the piston valve 10 and the body valve 20.

한편, 차량 장착 시 쇽 업소버의 전체 길이는 길게 요구되는 반면에, 쇽 업소버의 스트로크는 그에 비해 상대적으로 좁은 구간만이 요구되는 경우 피스톤 로드(5)의 길이 축소 및 스트로크를 제한해야 하는 경우가 있다.On the other hand, while the overall length of the shock absorber is required to be long when the vehicle is mounted, the stroke of the shock absorber may need to limit the length reduction and stroke of the piston rod 5 when only a relatively narrow section is required. .

이와 같은 경우 종래에는 쇽 업소버의 상부로 노출되는 피스톤 로드(5)의 일단에 돌출부재(6)를 용접 등의 방법으로 고정시키고, 쇽 업소버의 상단부에는 돌출부재(6)와 걸림작용할 수 있는 걸림부재(7)를 고정시켜 피스톤 로드(5)의 압축시쇽 업소버 내부로 들어가는 피스톤 로드(5)의 운동을 제한할 수 있도록 하였다.In this case, in the related art, the protrusion member 6 is fixed to one end of the piston rod 5 exposed to the upper portion of the shock absorber by welding or the like, and the upper end of the shock absorber may be engaged with the protrusion member 6. The member 7 is fixed so that the movement of the piston rod 5 entering the compression shim absorber of the piston rod 5 can be restricted.

그러나 이와 같은 종래 기술은 피스톤 로드(5)에 별도의 돌출부재(6)를 고정시켜야 함은 물론, 쇽 업소버 상단에 별도의 걸림부재(7)를 고정시켜야 하므로 제작비용 및 조립공정이 증가하는 불편함이 있었다.However, such a prior art has to fix a separate protruding member 6 to the piston rod 5, as well as a separate locking member 7 to be fixed at the top of the shock absorber, which increases the manufacturing cost and the assembly process. There was a ham.

따라서, 본 발명은 상술한 바와 같은 종래의 문제점을 해결하기 위한 것으로서, 쇽 업소버의 길이에 비해 상대적으로 짧은 피스톤 로드의 스트로크를 제한하는 스토퍼를 튜브 일단에 단순한 구조로 설치하여 제작비용 및 조립공정을 단순화시킬 수 있는 쇽 업소버의 피스톤 로드 스토퍼를 제공하는데 그 목적이 있다.Therefore, the present invention is to solve the conventional problems as described above, by providing a stopper for limiting the stroke of the piston rod relatively short compared to the length of the shock absorber with a simple structure at one end of the tube to reduce the manufacturing cost and assembly process The object is to provide a piston rod stopper of a shock absorber that can be simplified.

도 1은 종래 쇽 업소버를 도시한 단면도.1 is a cross-sectional view showing a conventional shock absorber.

도 2는 본 발명에 따른 쇽 업소버를 도시한 단면도 및 부분확대 단면도.2 is a cross-sectional view and a partially enlarged cross-sectional view showing a shock absorber according to the present invention.

도 3은 본 발명에 따른 돌기가 구비된 원통형 튜브를 도시한 평단면도.Figure 3 is a plan sectional view showing a cylindrical tube provided with a projection according to the present invention.

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

2 : 원통형 튜브 5 : 피스톤 로드2: cylindrical tube 5: piston rod

10 : 피스톤 밸브 30 : 돌기10: piston valve 30: protrusion

이와 같은 목적을 달성하기 위하여 본 발명은 쇽 업소버의 길이에 비해 상대적으로 짧은 피스톤 로드의 스트로크를 제한하는 스토퍼를 구비한 쇽 업소버에 있어서, 피스톤 밸브가 습동 왕복운동하는 원통형 튜브의 내경면에 미리 결정된 위치에서 상기 피스톤 밸브가 더 이상 하강되는 것을 차단할 수 있도록 다수의 돌기가 돌출 형성되는 것을 특징으로 한다.In order to achieve the above object, the present invention provides a shock absorber having a stopper for limiting the stroke of a piston rod, which is relatively short compared to the length of the shock absorber. It is characterized in that a plurality of protrusions are formed to protrude so that the piston valve is no longer lowered in position.

이하 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시예를 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 업소버를 도시한 단면도 및 부분확대 단면도이고, 도 4는 본 발명에 따른 돌기가 구비된 원통형 튜브를 도시한 평단면도이다.Figure 2 is a cross-sectional view and a partially enlarged cross-sectional view showing a shock absorber according to the present invention, Figure 4 is a cross-sectional plan view showing a cylindrical tube with a projection according to the present invention.

본 발명에 따른 쇽 업소버는 앞서 설명한 바와 같이, 차량 장착 시 쇽 업소버의 전체 길이는 길게 요구되는 반면에, 쇽 업소버의 스트로크는 그에 비해 상대적으로 좁은 구간만이 요구되는 경우 피스톤 로드의 길이 축소 및 스트로크를 제한해야 하는 경우에 해당한다. 한편, 쇽 업소버의 통상적인 구조는 앞서 설명하고 도시된 선행기술과 동일하므로 이에 대한 상세한 설명은 생략하는 것과 함께 동일한 부호로서 설명한다.As described above, the shock absorber according to the present invention requires the entire length of the shock absorber to be long when the vehicle is mounted, whereas the stroke of the shock absorber reduces the length and stroke of the piston rod when only a relatively narrow section is required. This is the case when it is necessary to limit. On the other hand, the conventional structure of the shock absorber is the same as the prior art described and shown in the prior art, so the detailed description thereof will be described with the same reference numerals omitted.

본 발명에 따른 피스톤 로드(5)의 길이는 쇽 업소버의 전체 길이에 비해 상대적으로 짧게 형성되어 있으므로 피스톤 로드(5)를 일정위치에서 더 이상 들어가지 못하도록 하는 스토퍼가 필요하다.Since the length of the piston rod 5 according to the present invention is formed relatively short compared to the overall length of the shock absorber, a stopper is required to prevent the piston rod 5 from entering at a certain position any more.

본 발명에 따른 피스톤 로드 스토퍼는 원통형 튜브(2) 내부에 간단한 방법으로 형성될 수 있다. 즉, 원통형 튜브(2) 내측으로는 피스톤 밸브(10)가 습동되는데 피스톤 밸브(10)의 하강 운동을 억지로 차단할 수 있도록 돌기(30)를 미리 결정된 위치에 형성함으로써 피스톤 로드(5)의 하강을 차단할 수 있다.The piston rod stopper according to the invention can be formed in a simple way inside the cylindrical tube 2. That is, the piston valve 10 slides inside the cylindrical tube 2, so that the lowering of the piston rod 5 is formed by forming the projection 30 at a predetermined position so that the downward movement of the piston valve 10 can be forcibly blocked. You can block.

본 발명에 따른 돌기(30)는 원통형 튜브(2) 형성 시 일체로 형성할 수도 있으며, 일단 원통형 튜브(2)를 형성 한 후 별도의 프레스 공정을 통해서도 형성할 수 있다.The protrusion 30 according to the present invention may be integrally formed when the cylindrical tube 2 is formed, and may be formed through a separate press process after the cylindrical tube 2 is formed once.

본 발명에 따른 돌기(30)와 접촉하는 피스톤 밸브(10)는 충분한 강성을 가진 소결품이므로 돌기(30)와의 충격에 충분히 견딜 수 있다.Since the piston valve 10 in contact with the protrusion 30 according to the present invention is a sintered product having sufficient rigidity, it can sufficiently withstand the impact with the protrusion 30.

본 발명에 따른 돌기(30)는 실질적으로 피스톤 로드(5)를 더 이상 하강하지 못하도록 하는 것으로서 피스톤 로드의 스트로크를 결정하는 것은 당연하다.It is natural to determine the stroke of the piston rod as the projection 30 according to the invention prevents the piston rod 5 from lowering any further.

이처럼, 돌기(30)에 의해 피스톤 밸브(10)의 하강이 저지당함으로써 피스톤로드(5)는 상대적으로 쇽 업소버의 길이에 비해 짧게 형성되더라도 피스톤 로드(5)가 필요이상으로 쇽 업소버 내부로 들어가는 등의 작동상의 문제가 발생되지 않게 된다.As such, the lowering of the piston valve 10 is prevented by the projections 30, so that the piston rod 5 enters the shock absorber more than necessary even if the piston rod 5 is formed relatively short compared to the length of the shock absorber. Operation problems such as this do not occur.

이상에서 설명한 바와 같이 본 발명에 따른 쇽 업소버의 피스톤 로드 스토퍼는 기존의 구조에 비해 훨씬 단순한 구조이며, 별도의 조립공정의 추가를 가져오지 않게 되므로 제조비용을 절감할 수 있다.As described above, the piston rod stopper of the shock absorber according to the present invention has a much simpler structure than the existing structure, and does not bring an additional assembly process, thereby reducing manufacturing costs.

Claims (1)

쇽 업소버의 길이에 비해 상대적으로 짧은 피스톤 로드의 스트로크를 제한하는 스토퍼를 구비한 쇽 업소버에 있어서,A shock absorber having a stopper for limiting the stroke of a piston rod that is relatively short relative to the length of the shock absorber, 피스톤 밸브가 습동 왕복운동하는 원통형 튜브의 내경면에 미리 결정된 위치에서 상기 피스톤 밸브가 더 이상 하강되는 것을 차단할 수 있도록 다수의 돌기가 돌출 형성되는 것을 특징으로 한 쇽 업소버의 피스톤 로드 스토퍼.A piston rod stopper of shock absorber, characterized in that a plurality of protrusions protrude so as to prevent the piston valve from further lowering at a predetermined position on the inner diameter surface of the cylindrical tube in which the piston valve is sliding reciprocating.
KR1020010032743A 2001-06-12 2001-06-12 Piston rod stopper use in shock absorber KR20020094173A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662442U (en) * 1979-10-19 1981-05-26
JPH0265734U (en) * 1988-11-07 1990-05-17
JPH0953677A (en) * 1995-08-16 1997-02-25 Kayaba Ind Co Ltd Hydraulic shock absorber

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5662442U (en) * 1979-10-19 1981-05-26
JPH0265734U (en) * 1988-11-07 1990-05-17
JPH0953677A (en) * 1995-08-16 1997-02-25 Kayaba Ind Co Ltd Hydraulic shock absorber

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