KR100356191B1 - Hydraulic buffer - Google Patents

Hydraulic buffer Download PDF

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Publication number
KR100356191B1
KR100356191B1 KR1019970067973A KR19970067973A KR100356191B1 KR 100356191 B1 KR100356191 B1 KR 100356191B1 KR 1019970067973 A KR1019970067973 A KR 1019970067973A KR 19970067973 A KR19970067973 A KR 19970067973A KR 100356191 B1 KR100356191 B1 KR 100356191B1
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KR
South Korea
Prior art keywords
piston rod
inner cylinder
stopper
diameter
guide member
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KR1019970067973A
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Korean (ko)
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KR19990049119A (en
Inventor
김환국
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주식회사 만도
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Priority to KR1019970067973A priority Critical patent/KR100356191B1/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
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
    • F16F9/185—Bitubular units
    • 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
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F16F9/22—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with one or more cylinders each having a single working space closed by a piston or plunger
    • 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
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke
    • F16F9/49—Stops limiting fluid passage, e.g. hydraulic stops or elastomeric elements inside the cylinder which contribute to changes in fluid damping

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

Abstract

PURPOSE: A hydraulic buffer is provided to restrict the maximum output movement of a piston rod stably by sequentially and proportionally distributing hydraulic pressure to a stopper in moving out the piston rod with integrally forming a variable diameter flange extending downward in a lower part of a guide member. CONSTITUTION: A hydraulic buffer(10) is composed of an outer cylinder(11) fastened to a fixing member; an inner cylinder(12) installed in the outer cylinder and filled with fluid; a piston rod(13) fixing a piston(13a) inserted to the inner cylinder, and having a stopper(18) including an elastic member(18a) placed in the upper part of the piston and a supporting member(18b) fixing the elastic member; and a guide member(14) inserted to the upper part of the inner cylinder and fitted to the piston rod to guide reciprocating motion of the piston rod. A flange(19) is integrally extended in the lower part of the guide member to move the stopper in and out, and composed of an opening part(19a) attached to the inner cylinder with the first diameter, an inclined part(19b) forming the acute angle from the upper part of the opening part and an end(19c) vertically formed from the upper part of the inclined part and integrally connected to the lower part of the guide member with the second diameter.

Description

유압식 완충기Hydraulic shock absorber

본 발명은 자동차 또는 여러 기계장치에서 발생되는 충격 또는 진동을 흡수 또는 감쇠시키기 위한 유압식 완충기에 관한것으로서, 특히, 피스톤로드의 최대 인출행정을 제한하기 위한 스토퍼에 순차적으로 유압을 인가시켜 스토퍼에 가해지는 충격을 분산시킬 수 있음은 물론 유연하고 소프트하게 작동될 수 있는 유압식 완충기에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic shock absorber for absorbing or damping shocks or vibrations generated in automobiles or various mechanical apparatuses. In particular, the present invention relates to a stopper for limiting the maximum withdrawal stroke of a piston rod. The present invention relates to a hydraulic shock absorber that is capable of distributing shocks and can be operated flexibly and softly.

일반적으로 자동차의 현가장치 또는 개폐장치에는 쇽업소버 또는 댐퍼와 같은 완충기가 제공되어 있어 진동 또는 충경력을 흡수 또는 완화시킬 수 있음은 물론 용이하고 안정적인 개폐를 달성할 수 있다.In general, a suspension or opening and closing device of a vehicle is provided with a shock absorber or a shock absorber such as a damper to absorb or alleviate vibration or shock force, as well as to achieve easy and stable opening and closing.

이같은 일반적이 유압식 완충기는 도 1에 도시된 바와 같이, 실제적으로 완충기의 외형을 형성하는 외측실린더(1)와, 상기 외측실린더(1)의 내측에 기밀 제공되며 내부에 오일과 같은 유체가 봉입되는 내측실린더(2)와, 상기 내측실린더92)의 내외로 왕복동되고 일단부에 상기 내측실린더(2)에 왕복동 가능하게 삽설되는 피스톤(3a)이 고정된 피스톤로드(3)와, 상기 내측실린더(2)의 상부에 삽설되고 상기 피스톤로드(3)에 외삽되며 상기 피스톤로드(3)를 안내하는 가이드부재(4)로 이루어진다.Such a general hydraulic shock absorber, as shown in FIG. 1, is provided with an outer cylinder 1 that substantially forms the outer shape of the shock absorber, and is airtightly provided inside the outer cylinder 1 and filled with a fluid such as oil therein. A piston rod 3 on which an inner cylinder 2 and a piston 3a reciprocated in and out of the inner cylinder 92 and inserted into the inner cylinder 2 reciprocally in one end thereof are fixed, and the inner cylinder ( It is made of a guide member (4) inserted in the upper portion of 2) and extrapolated to the piston rod (3) and guides the piston rod (3).

물론, 상기 외측실린더(1)의 상단부에는 상기 피스톤로드(3)의 주변과 접하는 오일씨일(5)을 보지하는 지지부재(6)가 삽설되며 또한, 상기 외측실린더(1)의 최상부는 캡(7)에 의해 폐쇄된다.Of course, a support member 6 holding an oil seal 5 in contact with the periphery of the piston rod 3 is inserted into the upper end of the outer cylinder 1, and the top of the outer cylinder 1 is capped. Closed by (7).

한편, 상기 피스톤로드(3)의 제위치, 보다 상세하게는 상기 피스톤로드(3)의 단부에 제공된 피스톤(3a)으로부터 일정거리에 위치에는 상기 피스톤로드(3)의 최대 행정을 한정하기 위한 스토퍼(8)가 제공된다.On the other hand, a stopper for limiting the maximum stroke of the piston rod (3) at the position of the piston rod (3), more specifically at a certain distance from the piston (3a) provided at the end of the piston rod (3) (8) is provided.

상기 스토퍼(8)는 상기 피스톤로드의 최대 전개행정시 상기 가이드부재(4)의 하부면에 접하며 실제로 피스톤로드(3)의 최대 전개 행정을 제한하는 스토퍼부재(8a)와, 상기 스토퍼부재(8a)를 지지하며 피스톤로드(8)에 예컨대 링과 같은 체결수단에 의해 고정되는 지지부(8b)로 이루어진다. 물론 상기 스토퍼부재(8a)가 실제로 접촉하는 가이드부재(4)의 하부에는 다소의 깊이의 홈(4a)이 형성된다.The stopper 8 is in contact with the lower surface of the guide member 4 at the maximum stroke of the piston rod and actually stops the stopper member 8a and the stopper member 8a to limit the maximum stroke of the piston rod 3. ) And a support 8b fixed to the piston rod 8 by fastening means such as a ring, for example. Of course, a lower depth groove 4a is formed in the lower portion of the guide member 4 which the stopper member 8a actually contacts.

이같은 완충기의 작동시, 예컨대 피스톤로드(3)의 고정단이 고정된 개폐부재를 개방시키기 위해 피스톤로드(3)가 인발되면 피스톤로드(3)가 내측실린더(2)로부터 인출됨과 동시에 피스톤(3a)이 이동되며 또한 상기 스토퍼(8)가 동일 방향으로 이동된다.In operation of such a shock absorber, for example, when the piston rod 3 is pulled out to open the opening / closing member on which the fixed end of the piston rod 3 is fixed, the piston rod 3 is drawn out from the inner cylinder 2 and at the same time the piston 3a. ) Is moved and the stopper 8 is moved in the same direction.

이후, 개폐부재가 완전히 개방됨에 따라 피스톤로드(3)가 최대로 이동되는 경우 피스톤로드(3)에 제공된 스토퍼의 스토퍼부재(8a)가 가이드부재(4)의 하부면의 홈(4a)에 접하게된다.Then, when the piston rod 3 is moved to the maximum as the opening and closing member is fully opened, the stopper member 8a of the stopper provided on the piston rod 3 is in contact with the groove 4a of the lower surface of the guide member 4. do.

이때, 신속하고 강력하게 개폐부재를 개방하는 경우에는 스토퍼(8)가 가이드부재(4)를 강력하게 타격함으로써 스토퍼부재(8a)가 손상되거나 소음이 발생하는 문제점이 있었다.In this case, when the opening and closing member is opened quickly and strongly, the stopper 8 strongly strikes the guide member 4, thereby causing a problem that the stopper member 8a is damaged or noise is generated.

특히, 피스톤로드의 최대인출 행정시 단지 스토퍼와 가이드부재의 접촉에 의해서만 한정 및 제어됨으로 인해 과도한 하중이 집중적으로 가해지는 스토퍼부재를 가격이 비싼 내구성재질로 형성해야 하는 불리함이 있었다.In particular, there is a disadvantage in that the stopper member to which the excessive load is intensively formed is made of a durable expensive material because it is limited and controlled only by the contact of the stopper and the guide member during the maximum drawing stroke of the piston rod.

또한 상기된 바와 같이 스토퍼부재에 과도한 하중이 집중되어 스토퍼부재가 변형되는 경우 부하의 편중이 심하게되어 피스톤로드가 원활하게 작동되지 못하게되는 문제점이 있었다.In addition, as described above, when an excessive load is concentrated on the stopper member and the stopper member is deformed, there is a problem in that the load is severely biased so that the piston rod may not operate smoothly.

본 발명은 상술된 여러 가지 문제점들을 감안해서 이루어진 것으로써, 본 발명의 목적은 피스톤로드의 최대인출이동시 스토퍼에 인가되는 하중을 순차적으로 분산 시킬 수 있는 유압식 완충기를 제공하는데 있다.The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a hydraulic shock absorber that can sequentially distribute the load applied to the stopper when the piston rod is pulled out.

본 발명의 다른 목적은, 피스톤로드의 최대 인출행정을, 초기에 스토퍼에 유압을 카하는 방식으로 한정하고 최종적으로 스토퍼와 가이드부재간의 접촉에 의해 한정 되도록 구성하여 스토퍼에 인가되는 하중을 분산시킬수 있어 효과적으로 스토퍼의 최대 인출 행정을 제한함은 물론 스토퍼의 재질을 폭넓게 선택할 수 있어 제조비가 절감될 수 있는 유압식 완충기를 제공하는데 있다.Another object of the present invention is to limit the maximum withdrawal stroke of the piston rod by initially applying hydraulic pressure to the stopper, and finally to be limited by the contact between the stopper and the guide member to distribute the load applied to the stopper. In addition to effectively limiting the maximum withdrawal stroke of the stopper, it is possible to provide a hydraulic shock absorber that can reduce the manufacturing cost by selecting a wide range of stopper materials.

이같은 목적을 달성하기 위해 본 발명에 의한 유압식 완충기는 외형을 형성하며 고정부재에 고정되는 외측실린더와, 상기 외측실린더의 내측에 설치되고 내부에 유체가 봉입되는 내측실린더와, 상기 내측실린더의 내외로 왕복동되고 일단부에 상기 내측실린더에 왕복동 가능하게 삽설되는 피스톤이 고정되며 상기 피스톤의 상부 위치에 탄성부재 및 상기 탄성부재를 고정시키기 위한 지지부재로 이루어진 스토퍼수단이 제공된 피스톤로드와, 상기 내측실린더의 상부에 삽설되고 상기 피스톤 로드에 외삽되며 피스톤로드의 왕복동을 안내하는 가이드부재로 이루어진 유압식 완충기에 있어서, 상기 가이드부재의 하부에는 상기 스토퍼수단이 출입가능한 플랜지부가 일체로 연장 형성되며, 상기 플랜지부는 상기 내측실린더에 부착되며 제 1직경을 갖는 개구부와, 상기 개구부의 상부로부터 반경방향 내측으로 예각을 이루며 일체로 형성된 경사부와, 상기 경사부의 상부로부터 일체로 수직 형성되고 상기 가이드부재의 하부에 일체로 연접되며 제 2직경을 갖는 종단부가 일체로 형성되어 이루어지는 것을 특징으로 한다.In order to achieve the above object, the hydraulic shock absorber according to the present invention forms an outer shape and is fixed to a fixing member, an inner cylinder installed inside the outer cylinder and filled with a fluid, and into and out of the inner cylinder. A piston rod reciprocated and fixed at one end to be reciprocally inserted into the inner cylinder, and provided with a stopper means composed of an elastic member and a support member for fixing the elastic member at an upper position of the piston, In the hydraulic shock absorber made of a guide member inserted in the upper portion and extrapolated to the piston rod to guide the reciprocating movement of the piston rod, the lower portion of the guide member extends integrally formed with the flange portion through which the stopper means is accessible, wherein the flange portion is Attached to the inner cylinder and having a first diameter An inclined portion integrally formed at an acute angle radially inward from an upper portion of the opening portion, and an end portion having a second diameter integrally vertically formed integrally from an upper portion of the inclined portion and integrally connected to a lower portion of the guide member; Characterized in that formed.

도 1은 일반적인 유압식 완충기의 단면도.1 is a cross-sectional view of a general hydraulic shock absorber.

도 2는 본 발명에 따른 유압식 완충기의 단면도.2 is a cross-sectional view of a hydraulic shock absorber according to the present invention.

도 3은 본 발명에 따른 유압식 완충기의 요부의 부분확대 단면도.Figure 3 is an enlarged partial cross-sectional view of the main portion of the hydraulic shock absorber according to the present invention.

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

11: 외측실린더 12: 내측실린더11: outer cylinder 12: inner cylinder

13: 피스톤로드 14: 가이드부재13: piston rod 14: guide member

15: 오일씨일 16: 지지부재15: oil seal 16: support member

17: 캡 18: 스토퍼수단17: Cap 18: stopper means

19: 플랜지부19: flange

이하 본 발명에 의한 쇽업소버 구조의 일실시예를 첨부도면을 참조하여서 상세하게 설명한다.Hereinafter, an embodiment of a shock absorber structure according to the present invention will be described in detail with reference to the accompanying drawings.

도면중 도 2는 본 발명의 유압식 완충장치의 단면도이며, 도 3은 본 발명의 유압식 완충장치의 요부를 보여주는 부분확대 단면도이다.2 is a cross-sectional view of the hydraulic shock absorber of the present invention, Figure 3 is a partially enlarged cross-sectional view showing the main portion of the hydraulic shock absorber of the present invention.

도 2 및 도 3에 있어서, 자동차의 현가장치 또는 개폐장치에 적용될 수 있는 본 발명에 따른 유압식 완충장치(10)는 실제로 완충기의 외형을 형성하는 원통형 외측 실린더(11)를 포함하며, 상기 외측실린더(11)의 내측에는 유체가 봉입된 내측실린더(12)가 배설된다.2 and 3, the hydraulic shock absorber 10 according to the present invention, which can be applied to a suspension or opening and closing device of a motor vehicle, includes a cylindrical outer cylinder 11 which actually forms the outer shape of the shock absorber, wherein the outer cylinder Inside the cylinder 11, the inner cylinder 12 in which the fluid was sealed is arrange | positioned.

또한 상기 내측실린더(12)의 내측에는 일단부에 상기내측실린더(12)에서 왕복동 가능한 피스톤(13a)이 고정되고 타단부에는 도시되지않은 예컨대 개폐부재가 고정되며 상기 내측 실린더(12)의 내외로 왕복동 될 수있는 접속되는 피스톤로드(13)가 제공된다.In addition, a piston 13a reciprocating in the inner cylinder 12 is fixed to one end of the inner cylinder 12 and an opening / closing member (not shown) is fixed to the other end of the inner cylinder 12. A piston rod 13 is provided which can be reciprocated.

한편, 상기 내측실린더(12)의 상부에는 상기 피스톤로드(13)의 왕복동을 안내하는 가이드부재(14)가 내설된다.On the other hand, the upper portion of the inner cylinder 12 has a guide member 14 for guiding the reciprocating motion of the piston rod 13 is installed.

또한, 상기 외측실린더(11)의 상부 내측에는 상기 피스토로드(13)의 외주면과 접하는 오일씨일(15)을 지지하는 지지부재(16)가 내설되며, 상기 지지부재(16)의 상부의 외측실린더(11)에는 캡(17)이 장착되어 완전한 완충기의 조립체가 형성된다.In addition, a support member 16 for supporting the oil seal 15 in contact with the outer circumferential surface of the piston rod 13 is installed inside the upper side of the outer cylinder 11, and the upper portion of the support member 16 is provided. The outer cylinder 11 is equipped with a cap 17 to form an assembly of a complete shock absorber.

또, 상기 피스톤로드(13)의 단부에 고정된 피스톤(13a)의 상부에는 상기 피스톤로드(13)의 최대인출행정을 한정하기 위한 스토퍼수단(18)이 제공되는바, 상기 스토퍼수단은 실제로 상기 가이드부재(14)의 하부면에 접하는 탄성부재(18a)와, 상기 탄성부재(18a)를 피스톤로드(14)에 고정 배치시키며 직경(D)을 갖는 지지부재(18b)로 이루어진다.In addition, a stopper means 18 is provided on the upper part of the piston 13a fixed to the end of the piston rod 13 to limit the maximum withdrawal stroke of the piston rod 13, the stopper means being actually It consists of an elastic member (18a) in contact with the lower surface of the guide member 14, and the support member (18b) having a diameter (D) is fixedly arranged on the piston rod (14).

한편, 상기 가이드부재(14)의 하부면에는 상기 스토퍼수단(18)의 탄성부재(18a)의 상부면이 실제로 접하거나 타격되는 수용홈(14a)이 형성된다.On the other hand, the lower surface of the guide member 14 is formed with a receiving groove (14a) is actually in contact with or hit the upper surface of the elastic member (18a) of the stopper means (18).

특히, 상기 가이드부재(14)의 하부에는 플랜지부(19)가 일체로 형성되는바, 상기 플랜지부(19)는 최하부에 형성되며 제 1직경(d1)을 갖는 개구부(19a), 상기 개구부(19a)로부터 일정경사각(θ)으로 반경방향내측으로 경사지는 경사부(19b), 및 상기 경사부로부터 상기 가이드부재(14)의 하부면을 향해 수직형성되며 제 2직경(d2)을 갖는 종단부(19c)가 일체로 형성되어 이루어진다.In particular, the lower portion of the guide member 14, the flange portion 19 is formed integrally, the flange portion 19 is formed at the lowermost part of the opening (19a) having a first diameter (d1), the opening ( An inclined portion 19b inclined radially inwardly at a predetermined inclination angle θ from 19a, and a vertical end formed vertically from the inclined portion toward the lower surface of the guide member 14 and having a second diameter d2; 19c is formed integrally.

한편 상기 개구부(19a)의 직경(d1)은 상기 종단부(19c)의 직경보다 크게 설정되고 상기 경사부(19b)의 경사각(θ)은 예각으로 설정되는 것이 바람직하며, 또한 상기 종단부(19c)의 직경(d2)은 상기 스토퍼수단(18)의 지지부재(18b)의 직경(D)보다 다소 크게 형성되는 것이 바람직하다.On the other hand, it is preferable that the diameter d1 of the opening portion 19a is set larger than the diameter of the termination portion 19c, and the inclination angle θ of the inclination portion 19b is set to an acute angle, and the termination portion 19c. It is preferable that the diameter d2 of the c) is somewhat larger than the diameter D of the support member 18b of the stopper means 18.

이에 따라, 실제적으로 상기 스토퍼수단(18)은 상기 가이드부재(14)의 하부에 일체로 형성된 플랜지부(19)의 내부에서 충분히 왕복동 될 수 있다.Accordingly, in practice, the stopper means 18 can be sufficiently reciprocated inside the flange portion 19 integrally formed at the lower portion of the guide member 14.

다음은, 상기와 같이 구성된 본 발명에 의한 유압식완충기의 작용효과를 설명한다.Next, the operational effect of the hydraulic shock absorber according to the present invention configured as described above.

예컨대, 완충기(10)가 개폐부재에 적용된 경우 사용자에의해 또는 자동으로 개폐부재를 완전개방시키기위해 그 피스톤로드(13)가 실린더(11;12)외부로 최대로 인출되는 경우, 그 피스톤로드(13)에 고정된 스토퍼수단(18)이 동시에 피스톤로드(13)와 함꼐 이동된다.For example, when the shock absorber 10 is applied to the opening / closing member, when the piston rod 13 is pulled out to the outside of the cylinders 11 and 12 in order to completely open the opening / closing member, the piston rod ( The stopper means 18 fixed to 13 are simultaneously moved together with the piston rod 13.

이때, 피스톤로드(13)가 최대의 인출행정에 근접되면 1차적으로, 스토퍼수단(18)이 플랜지부(19)의 개구부(19a)로 입장되며, 이때 플랜지부(19)내부의 유압이 스토퍼수단(18)의 지지부재(18b)와 플랜지부(19)의 개구부(19a)사이에 형성된 통로(d1-d2)를 통해 빠져나감과 동시에 비교적 약한 하중이 스토퍼수단(18)에 인가된다.At this time, when the piston rod 13 approaches the maximum withdrawal stroke, the stopper means 18 enters the opening portion 19a of the flange portion 19 primarily, and at this time, the hydraulic pressure inside the flange portion 19 stops. A relatively weak load is applied to the stopper means 18 while exiting through the passages d1-d2 formed between the support member 18b of the means 18 and the opening 19a of the flange portion 19.

이후, 2차적으로 상기 스토퍼수단(18)이 계속이동되어 경사부(19b)를 지날때는 상기 지지부재(18b)와 경사부(19b)사이에 형성되는 수렴성통로로 유압이 유동됨으로써 비교적 큰 하중이 상기 스토퍼수단(18)에 인가된다.Thereafter, when the stopper means 18 continuously moves to pass the inclined portion 19b, hydraulic pressure flows through a converging passage formed between the support member 18b and the inclined portion 19b so that a relatively large load is generated. Is applied to the stopper means 18.

또한, 3차적으로 상기 경사부(19b)를 지난 스토퍼수단(18)이 종단부를 지날때는 스토퍼수단(18)의 지지부재(18b)와 종단부(19c)사이에 형성되는 통로(d2-D)를 통해 빠져나감과 동시에 가장 큰 유압이 스토퍼수단(18)에 인가된다.In addition, when the stopper means 18 which has passed the inclined portion 19b in the third direction passes through the termination portion, the passage d2-D is formed between the support member 18b of the stopper means 18 and the termination portion 19c. At the same time as it exits through the largest hydraulic pressure is applied to the stopper means (18).

최종적으로, 상기 스토퍼수단(18)의 탄성부재(18a)가 가이드부재(14)의 하부에 형성된 수용홈(14a)에 접촉되어 스토퍼수단(18)의 이동이 저지됨과 동시에 피스톤로드(13)의 인출 이동이 정지된다.Finally, the elastic member 18a of the stopper means 18 contacts the receiving groove 14a formed in the lower portion of the guide member 14 to stop the movement of the stopper means 18 and at the same time The withdrawal movement is stopped.

결과적으로 피스톤로드(13)의 인출이동은, 스토퍼수단(18)에 대한 순차적인 유압의 인가 및 스토퍼수단(18)과 가이드부재(14)간의 접촉으로 인해 유연하고 안정적으로 제한 되게 된다.As a result, the withdrawal movement of the piston rod 13 is restricted flexibly and stably due to the sequential application of hydraulic pressure to the stopper means 18 and the contact between the stopper means 18 and the guide member 14.

앞에서 설명한 바와 같이 본 발명에 따른 유압식 완충기에 의하면, 가이드 부재의 하부에 하방으로 연장되고 가변직경을 갖는 플랜지부를 일체로 형성하여 피스톤로드 인출 이동시 스토퍼에 가해지는 유압을 순차적이고 비례적으로 인가시킬 수 있어 유연하고 안정적으로 피스톤 로드의 최대 인출 이동을 한정할 수 있는 매우 실용적인 효과가 있다.As described above, according to the hydraulic shock absorber according to the present invention, a flange portion extending downward and having a variable diameter is integrally formed in the lower portion of the guide member to sequentially and proportionally apply hydraulic pressure applied to the stopper when the piston rod is pulled out. There is a very practical effect to limit the maximum withdrawal movement of the piston rod can be flexible and stable.

Claims (2)

외형을 형성하며 고정부재에 고정되는 외측실린더(11)와, 상기 외측실린더(11)의 내측에 설치되고 내부에 유체가 봉입되는 내측실린더(12)와, 상기 내측실린더(12)의 내외로 왕복동되고 일단부에 상기 내측실린더(2)에 왕복동 가능하게 삽설되는 피스톤(13a)이 고정되며 상기 피스톤의 상부 위치에 탄성부재(18a) 및 상기 탄성부재(18a)를 고정시키기 위한 지지부재(18b)로 이루어진 스토퍼수단(18)이 제공된 피스톤로드(13)와, 상기 내측실린더(2)의 상부에 삽설되고 상기 피스톤 로드(13)에 외삽되며 피스톤로드(3)의 왕복동을 안내하는 가이드부재(14)로 이루어진 유압식 완충기에 있어서, 상기 가이드부재(14)의 하부에는 상기 스토퍼수단(18)이 출입가능한 플랜지부(19)가 일체로 연장 형성되며, 상기 플랜지부(19)는 상기 내측실린더(12)에 부착되며 제 1직경(d1)을 갖는 개구부(19a)와, 상기 개구부(19a)의 상부로부터 반경방향 내측으로 예각(θ)을 이루며 일체로 형성된 경사부(19b)와, 상기 경사부(19b)의 상부로부터 일체로 수직 형성되고 상기 가이드부재(14)의 하부에 일체로 연접되며 제 2직경(d2)을 갖는 종단부(19c)가 일체로 형성되어 이루어지는 것을 특징으로 하는 유압식 완충기.An outer cylinder 11 which forms an outer shape and is fixed to the fixing member, an inner cylinder 12 installed inside the outer cylinder 11 and filled with a fluid, and reciprocating in and out of the inner cylinder 12. And a piston 13a which is reciprocally inserted into the inner cylinder 2 at one end thereof is fixed, and a support member 18b for fixing the elastic member 18a and the elastic member 18a at an upper position of the piston. A piston rod 13 provided with a stopper means 18, and a guide member 14 inserted into an upper portion of the inner cylinder 2, extrapolated to the piston rod 13, and guiding the reciprocating motion of the piston rod 3; In the hydraulic shock absorber consisting of a), the lower portion of the guide member 14 is formed integrally extending flange portion 19, the stopper means 18 is accessible, the flange portion 19 is the inner cylinder (12) ) And has a first diameter d1 An opening 19a, an inclined portion 19b integrally formed at an acute angle θ radially inward from an upper portion of the opening 19a, and integrally vertically formed from an upper portion of the inclined portion 19b and the guide; Hydraulic shock absorber, characterized in that the end portion (19c) integrally connected to the lower portion of the member (14) having a second diameter (d2) is formed integrally. 청구항 1에 있어서,The method according to claim 1, 상기 플랜지부(19)의 개구부(19a)의 제 1직경(d1)은 상기 종단부(19c)의 제 2직경(d2)보다 크며, 상기 종단부(19c)의 제 3직경(d2)은 상기 스토퍼수단(18)의 지지부재(18b)의 직경(D)보다 크게 형성되는 것을 특징으로 하는 유압식완충기.The first diameter d1 of the opening portion 19a of the flange portion 19 is larger than the second diameter d2 of the termination portion 19c, and the third diameter d2 of the termination portion 19c is the Hydraulic shock absorber, characterized in that formed larger than the diameter (D) of the support member (18b) of the stopper means (18).
KR1019970067973A 1997-12-11 1997-12-11 Hydraulic buffer KR100356191B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101782126B (en) * 2008-11-17 2012-07-25 株式会社万都 Rod guide for a shock absorber

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Publication number Priority date Publication date Assignee Title
KR100741276B1 (en) * 2003-04-01 2007-07-19 주식회사 만도 Stopper structure of a shock absorber

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56108037U (en) * 1980-01-19 1981-08-21
JPS59101031U (en) * 1982-12-25 1984-07-07 カヤバ工業株式会社 Locking mechanism
JPH0359540A (en) * 1989-07-28 1991-03-14 Hitachi Ltd Manufacture of liquid crystal display device
JPH0874919A (en) * 1994-08-31 1996-03-19 Suzuki Motor Corp Vehicular bumprubber device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56108037U (en) * 1980-01-19 1981-08-21
JPS59101031U (en) * 1982-12-25 1984-07-07 カヤバ工業株式会社 Locking mechanism
JPH0359540A (en) * 1989-07-28 1991-03-14 Hitachi Ltd Manufacture of liquid crystal display device
JPH0874919A (en) * 1994-08-31 1996-03-19 Suzuki Motor Corp Vehicular bumprubber device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101782126B (en) * 2008-11-17 2012-07-25 株式会社万都 Rod guide for a shock absorber

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