KR200289783Y1 - Cushion Plunger Fixing Structure of Hydraulic Cylinder - Google Patents

Cushion Plunger Fixing Structure of Hydraulic Cylinder Download PDF

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Publication number
KR200289783Y1
KR200289783Y1 KR2019970000857U KR19970000857U KR200289783Y1 KR 200289783 Y1 KR200289783 Y1 KR 200289783Y1 KR 2019970000857 U KR2019970000857 U KR 2019970000857U KR 19970000857 U KR19970000857 U KR 19970000857U KR 200289783 Y1 KR200289783 Y1 KR 200289783Y1
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South Korea
Prior art keywords
cushion plunger
hydraulic cylinder
fixing structure
cushion
piston rod
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KR2019970000857U
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Korean (ko)
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KR19980056797U (en
Inventor
김종인
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볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비
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Priority to KR2019970000857U priority Critical patent/KR200289783Y1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/226—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having elastic elements, e.g. springs, rubber pads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1457—Piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/755—Control of acceleration or deceleration of the output member

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Abstract

본 고안은 유압실린더의 쿠션플런저 고정구조에 관한 것으로, 더욱 상세하게는 유압실린더 내에서의 피스톤 왕복시 충격완화를 위해 피스톤로드 단부의 수납홈 내에 삽입 고정되는 쿠션플런저 고정구조에 있어서, 상기 수납홈에 삽입되는 상기 쿠션플런저 일측 단부에 형성되는 환형의 걸림턱과, 상기 수납홈에 삽입되며 고정수단에 의해 고정 지지되어 상기 수납홈으로부터 상기 쿠션플런저의 이탈됨을 방지하는 부싱을 구비하여 구성됨을 특징으로 하는 유압실린더의 쿠션플런저 고정구조를 제공한다.The present invention relates to a cushion plunger fixing structure of the hydraulic cylinder, and more particularly, in the cushion plunger fixing structure that is inserted and fixed in the receiving groove of the piston rod end for shock mitigation during piston reciprocating in the hydraulic cylinder, And an annular locking jaw formed at one end of the cushion plunger inserted into the accommodating groove and a bushing inserted into the accommodating groove and fixedly supported by a fixing means to prevent the cushion plunger from being separated from the accommodating groove. It provides a cushion plunger fixing structure of the hydraulic cylinder.

Description

유압실린더의 쿠션플런저 고정구조Cushion Plunger Fixing Structure of Hydraulic Cylinder

본 고안은 유압실린더의 쿠션플런저(CUSHION PLUNGER) 고정구조에 관한 것으로, 더욱 상세하게는 유압실린더의 피스톤로드 단부에 장착되어 피스톤 왕복운동시 (스트로크엔드시) 발생되는 충격을 완화시켜주는 쿠션플런저의 고정에 관한 것이다.The present invention relates to a cushioning plunger (CUSHION PLUNGER) fixed structure of the hydraulic cylinder, and more specifically, to the cushion rod plunger that is mounted on the piston rod end of the hydraulic cylinder to mitigate the shock generated during the piston reciprocating motion (stroke end) It's about fixing.

유압실린더는 스트로크 최종점에서 피스톤이 실린더 내벽과 충돌하여 쇼크를 일으키게 되고, 이러한 쇼크에 의해 유압실린더를 구성하는 각 부품의 손상과 소음 및 진동을 야기하는 문제점이 있다.The hydraulic cylinder has a problem that the piston at the stroke end point collides with the inner wall of the cylinder to cause a shock, causing the damage, noise and vibration of each component constituting the hydraulic cylinder by this shock.

그러므로, 이와 같은 문제점을 해결하기 위하여, 유압실린더에 쿠션용 돌출 또는 쿠션플런저 등의 각종 쿠션기구를 설치하였다.Therefore, in order to solve such a problem, various cushioning mechanisms, such as a cushion protrusion or a cushion plunger, were installed in the hydraulic cylinder.

이러한 쿠션기구는 일반적으로, 실린더 내벽(스트로크 최종점)에 형성된 유로와, 이 유로를 개폐할 수 있도록 설치된 볼첵(Ball Check)으로 이루어진 쿠션밸브와, 피스톤의 단부에 장착된 쿠션플런저로 구성되며, 전자의 쿠션밸브는 피스톤의 스트로크 최종점에서 전술한 쿠션플런저가 유로속을 밀고 들어가면 유로속에 갇힌 오일은 전술한 볼첵을 밀고 외부로 배출되면서 쿠션작용을 수행하였다.Such a cushioning mechanism generally includes a cushion valve formed of a flow path formed on the inner wall of the cylinder (stroke end point), a ball check installed to open and close the flow path, and a cushion plunger mounted on an end of the piston. As for the former cushion valve, when the above-mentioned cushion plunger pushed into the flow path at the end point of the piston, the oil trapped in the flow path pushed the above-mentioned volume and discharged to the outside to perform the cushioning function.

한편, 전술한 쿠션플런저는 피스톤 왕복운동시마다 실린더 내벽과의 충돌로 인한 반복적인 충격을 받게되어 쉽게 손상되는 부품이므로, 유압실린더의 최적 성능을 유지하기 위해서는 주기적으로 이를 교체해야 했다.On the other hand, the above-mentioned cushion plunger is a component that is easily damaged by repeated impact due to the collision with the inner wall of the cylinder every time the piston reciprocating movement, it was necessary to replace it periodically to maintain the optimum performance of the hydraulic cylinder.

도 1에서는 이러한 쿠션플런저(103)가 피스톤로드(101)에 장착되는 장착구조를 도시하는 데, 피스톤로드(101)의 내단부에 수납홈(102)이 형성되고, 이 수납홈(102)속에 쿠션플런저(103)가 삽입되었다.1 shows a mounting structure in which the cushion plunger 103 is mounted on the piston rod 101. An accommodating groove 102 is formed at an inner end of the piston rod 101. The cushion plunger 103 is inserted.

그리고, 쿠션플런저(103)가 삽입된 상태에서 이를 위치고정하고, 필요시 피스톤로드(101)로 부터 쿠션플런저(103)를 분리하기 위하여, 전술한 피스톤로드(101)내단부의 수납홈(102)의 내경을 따라 반구경 단면을 갖는 환형홈(104)을 가공하고, 이 환형홈(104)과 대응된 위치의 플린저(103)의 외경에도 반구형 단면을 갖는 환형홈(105)을 가공하며, 이들 환형홈(104, 105)사이에 스틸볼(106)들을 게재하여, 이 스틸볼(106)에 의해 플린저(103)가 지지되게 하였다.Then, in order to fix the position in the state where the cushion plunger 103 is inserted, and to separate the cushion plunger 103 from the piston rod 101, the receiving groove 102 of the inner end of the piston rod 101 described above. And processing the annular groove 104 having a semi-diameter cross section along the inner diameter of), and also processing the annular groove 105 having a hemispherical cross section in the outer diameter of the plunger 103 at a position corresponding to the annular groove 104. The steel balls 106 were placed between these annular grooves 104 and 105 so that the plunger 103 was supported by the steel balls 106.

그러나, 이러한 종래의 쿠션플런저 장착구조는 쿠션플런저(103)의 충돌에 의한 충격의 대부분을 전술한 스틸볼(106)에서 지탱하게 되므로, 내구성이 극히 취약하고 파손의 우려가 많다는 결점이 있었다.However, since the conventional cushion plunger mounting structure supports most of the impact caused by the collision of the cushion plunger 103 in the steel ball 106 described above, there is a drawback that the durability is extremely weak and there is a lot of damage.

또한, 피스톤의 내경 및 쿠션플런저의 외경을 따라 전술한 환형홈을 가공하는 데에 상당한 작업상의 어려움이 수반되었으며, 특히 이 환형홈들의 외경이 전술한 스틸볼의 구경과 정확하게 일치되지 않으면, 쿠션플런저의 충돌시에 스틸볼 또는 쿠션플런저가 더욱 쉽게 파손되어 버리는 문제점이 있었으므로, 상당한 가공정밀도가 요구되었다.In addition, processing of the annular grooves described above along the inner diameter of the piston and the outer diameter of the cushion plunger entailed considerable operational difficulties, especially when the outer diameters of the annular grooves do not exactly match the apertures of the aforementioned steel balls. There was a problem that the steel ball or cushion plunger was more easily broken at the time of the collision, so that a considerable processing precision was required.

본 고안은 전술한 바와 같은 종래기술의 문제점을 감안하여 이루어진 것으로, 본 고안의 목적은 내구성이 향상되고 부품수가 절감되며 제작 및 조립공수가 대폭 절감된 유압실린더의 쿠션플런저 고정구조를 제공하는 데 있다.The present invention has been made in view of the problems of the prior art as described above, an object of the present invention is to provide a cushion plunger fixing structure of the hydraulic cylinder is improved durability, the number of parts is reduced and the number of manufacturing and assembly labor is significantly reduced.

도 1은 종래기술에 의한 유압실린더의 쿠션플런저 고정 상태도1 is a fixed state of the cushion plunger of the hydraulic cylinder according to the prior art

도 2는 본 고안에 의한 유압실린더의 쿠션플런저 고정 상태도2 is a fixed state of the cushion plunger of the hydraulic cylinder according to the present invention

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 피스톤로드1: piston rod

2 : 수납홈2: storage groove

3 : 쿠션플런저(Cushion Plunger)3: Cushion Plunger

4 : 걸림턱4: hanging jaw

5 : 부싱5: bushing

6 : 세트스크류6: set screw

전술한 본 고안의 목적은, 유압실린더 내에서의 피스톤 왕복시 충격완화를 위해 피스톤로드 단부의 수납홈 내에 삽입 고정되는 쿠션플런저 고정구조에 있어서, 상기 수납홈에 삽입되는 상기 쿠션플런저 일측 단부에 형성되는 환형의 걸림턱과, 상기 수납홈에 삽입되며 고정수단에 의해 고정 지지되어 상기 수납홈으로부터 상기 쿠션플런저의 이탈됨을 방지하는 부싱을 구비하여 구성됨을 특징으로 하는 유압실린더의 쿠션플런저 고정구조를 제공함에 의해 달성된다.An object of the present invention described above is a cushion plunger fixing structure that is inserted into and fixed in an accommodation groove of a piston rod end for shock mitigation during piston reciprocation in a hydraulic cylinder, and is formed at one end of the cushion plunger inserted into the accommodation groove. To provide a cushioning plunger fixing structure of the hydraulic cylinder characterized in that it comprises an annular locking jaw and a bushing inserted into the receiving groove and fixedly supported by the fixing means to prevent the cushion plunger from being separated from the receiving groove. Is achieved by.

본 고안의 바람직한 특징은, 상기 고정수단은 상기 부싱과 상기 피스톤로드의 경계부에 설치되어 상기 피스톤로드 구동시 상기 수납홈으로부터 상기 부싱의 이탈됨을 방지하는 적어도 하나이상의 스크류를 구비하여 구성됨을 특징으로 하는 유압실린더의 쿠션플런저 고정구조를 제공한다.A preferred feature of the present invention is characterized in that the fixing means is provided with at least one screw installed at the boundary between the bushing and the piston rod to prevent separation of the bushing from the receiving groove when the piston rod is driven. Provides a cushion plunger fixing structure of the hydraulic cylinder.

이하, 본 고안의 바람직한 실시예를 첨부도면을 따라 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2에 도시된 바와 같이, 유압실린더의 피스톤로드(1) 단부에 수납홈(2)이 형성되며, 수납홈(2)에 길이방향으로 삽입 고정되는 쿠션플런저(3)의 일측 단부에 환형의 걸림턱(4)이 형성되며, 걸림턱(4)을 지지하여 수납홈(2)으로부터 쿠션플런저(3)의 이탈됨을 방지하는 부싱(5)을 수납홈(2)에 긴밀하게 압입시키되, 부싱(5)은 부싱(5)과 피스톤로드(1) 사이의 경계부에 동심원상으로 고정되는 적어도 하나이상의 세트스크류(6)에 의해 피스톤로드(1) 구동시 수납홈(2)으로부터 이탈됨이 방지되도록 고정된다.As shown in FIG. 2, an accommodating groove 2 is formed at an end of the piston rod 1 of the hydraulic cylinder, and an annular shape is formed at one end of the cushion plunger 3 inserted and fixed in the longitudinal direction to the accommodating groove 2. The locking jaw 4 is formed, and the bushing 5 is tightly pressed into the storage groove 2 to support the locking jaw 4 to prevent the cushion plunger 3 from being separated from the storage groove 2. (5) is prevented from being separated from the receiving groove (2) when the piston rod 1 is driven by at least one set screw (6) concentrically fixed to the boundary between the bushing (5) and the piston rod (1) Is fixed as possible.

이상에서와 같이, 본 고안에 의한 유압실린더의 쿠션플런저 고정구조는, 유압실린더의 피스톤로드 단부에 쿠션플런저를 고정시키는 구조 간단화로 제작 및 조립 공수를 대폭적으로 줄여 작업 비용을 크게 낮추며, 피스톤로드의 스트로크엔드시 충격으로부터 유압실린더를 구성하는 부품의 손상됨을 방지할 수 있도록 한것이다.As described above, the cushion plunger fixing structure of the hydraulic cylinder according to the present invention, by simplifying the structure to secure the cushion plunger to the piston rod end of the hydraulic cylinder, greatly reducing the manufacturing and assembly labor, significantly reduce the work cost, This prevents damage to the components constituting the hydraulic cylinder from impact at the stroke end.

Claims (2)

유압실린더 내에서의 피스톤 왕복시 충격완화를 위해 피스톤로드 단부의 수납홈 내에 삽입 고정되는 쿠션플런저 고정구조에 있어서,In the cushion plunger fixing structure which is inserted and fixed in the receiving groove of the piston rod end for shock mitigation during piston reciprocating in the hydraulic cylinder, 상기 수납홈에 삽입되는 상기 쿠션플런저 일측 단부에 형성되는 환형의 걸림턱과,An annular locking jaw formed at one end of the cushion plunger inserted into the receiving groove; 상기 수납홈에 삽입되며 고정수단에 의해 고정 지지되어 상기 수납홈으로부터 상기 쿠션플런저의 이탈됨을 방지하는 부싱을 구비하여 구성됨을 특징으로 하는 유압실린더의 쿠션플런저 고정구조.And a bushing inserted into the accommodating groove and fixedly supported by a fixing means to prevent the cushion plunger from being separated from the accommodating groove. 청구항 1에 있어서, 상기 고정수단은 상기 부싱과 상기 피스톤로드의 경계부에 설치되어 상기 피스톤로드 구동시 상기 수납홈으로부터 상기 부싱의 이탈됨을 방지하는 적어도 하나이상의 스크류를 구비하여 구성됨을 특징으로 하는 유압실린더의 쿠션플런저 고정구조.The hydraulic cylinder of claim 1, wherein the fixing means includes at least one screw installed at a boundary between the bushing and the piston rod to prevent separation of the bushing from the receiving groove when the piston rod is driven. Cushion plunger fixing structure.
KR2019970000857U 1997-01-22 1997-01-22 Cushion Plunger Fixing Structure of Hydraulic Cylinder KR200289783Y1 (en)

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KR2019970000857U KR200289783Y1 (en) 1997-01-22 1997-01-22 Cushion Plunger Fixing Structure of Hydraulic Cylinder

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KR2019970000857U KR200289783Y1 (en) 1997-01-22 1997-01-22 Cushion Plunger Fixing Structure of Hydraulic Cylinder

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101427673B1 (en) * 2012-12-27 2014-08-12 동양기전 주식회사 Hydraulic cylinder apparatus improving oil pathway structure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100868371B1 (en) * 2007-02-07 2008-11-12 코막중공업 주식회사 Mini loader buffering cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101427673B1 (en) * 2012-12-27 2014-08-12 동양기전 주식회사 Hydraulic cylinder apparatus improving oil pathway structure

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