KR970000081Y1 - Pressure surging control circuit for an excavator boom cylinder - Google Patents
Pressure surging control circuit for an excavator boom cylinder Download PDFInfo
- Publication number
- KR970000081Y1 KR970000081Y1 KR2019930022964U KR930022964U KR970000081Y1 KR 970000081 Y1 KR970000081 Y1 KR 970000081Y1 KR 2019930022964 U KR2019930022964 U KR 2019930022964U KR 930022964 U KR930022964 U KR 930022964U KR 970000081 Y1 KR970000081 Y1 KR 970000081Y1
- Authority
- KR
- South Korea
- Prior art keywords
- boom cylinder
- boom
- valve
- cylinder
- hydraulic circuit
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
내용 없음.No content.
Description
제1도는 종래의 붐 작동 유압회로도.1 is a conventional boom operation hydraulic circuit diagram.
제2도는 본 고안에 따른 유압회로도.2 is a hydraulic circuit diagram according to the present invention.
제3도는 본 고안에 따른 충격흡수용 유압회로의 작동상태를 도시하는 유압회로도이다.3 is a hydraulic circuit diagram showing an operating state of the shock absorbing hydraulic circuit according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
10 : 붐 실린더 11 : 로드부10 boom cylinder 11 rod portion
1.2 : 헤드부 13 : 불 스풀(BOOM SPOOL)1.2: Head 13: Boom Spool
14 : 탱크 15 : 유압펌프14 tank 15 hydraulic pump
20 : 솔레노이드 밸브A 22 : 솔레노이드 밸브 B20: Solenoid Valve A 22: Solenoid Valve B
22 : 어큐물레이터 23 : 스위치22: Accumulator 23: Switch
24 : 리스트릭션 밸브(RESTRICTION VALVE)24: Reaction Valve
25, 26 : 유로25, 26: Euro
27, 28 : 체크밸브27, 28: check valve
본 고안은 굴삭기의 붐 실린더에 있어서 프론트 어태치먼트(FRONT ATTACHMENT)의 자중에 의한 충격을 흡수하기 위한 굴삭기 붐 실린더의 충격흡수용 유압회로에 관한 것이다.The present invention relates to a hydraulic circuit for shock absorption of an excavator boom cylinder for absorbing the impact of the weight of the front attachment (FRONT ATTACHMENT) in the excavator boom cylinder.
제1도는 종래의 붐 실린더용 유압회로를 도시하는 것인데, 종래에 있어서는 유압펌프(15)와 붐 실린더(10) 사이에 붐 실린더 절환용 붐 스풀(13)이 설치되어, 상기 붐 스풀(13)의 절환에 따라 붐 실린더가 상승, 하강 또는 정지하도록 구성되어 있었다.1 shows a conventional hydraulic circuit for a boom cylinder. In the related art, a boom spool for switching a boom cylinder 13 is provided between the hydraulic pump 15 and the boom cylinder 10, and the boom spool 13 It was configured to raise, lower or stop the boom cylinder according to the change of.
따라서 종래의 경우 굴삭기의 주행시나 중량물을 들어서 옮기는 크레인 작업시 프론트 어태치먼트의 자중에 의한 충격이 발생하고, 이 충격은 장비 전체에 진동을 유발하여 운전자의 승차감에 악영향을 미침과 동시에 운전자의 조작미숙에 의한 사고의 위험성을 내포하고 있었다.Therefore, in the conventional case, an impact caused by the weight of the front attachment occurs during the operation of an excavator or a crane carrying a heavy object, and this impact causes vibration of the entire equipment, which adversely affects the driver's riding comfort and at the same time the driver's immaturity. There was a risk of accidents.
본 고안은 상기한 바와 같은 제반 문제점을 해결하기 위하여 안출된 것으로 붐 실린더와 붐 스풀 사이에 붐 실린더에서 발생되는 충격을 흡수하기 위한 유압회로를 구성함으로써 장비 전체의 진동을 억제하는 댐핑(damping)을 기능을 발휘하여 운전자의 승차감을 증진시키고, 조작미숙에 의한 사고의 위험성을 감소시키도록 하는 굴삭기 붐 실린더의 충격역흡수용 유압회로를 제공하는 것을 목적으로 한다.The present invention has been devised to solve the above problems, and the damping to suppress the vibration of the entire equipment by configuring a hydraulic circuit for absorbing the shock generated in the boom cylinder between the boom cylinder and the boom spool It is an object of the present invention to provide a hydraulic circuit for absorbing shock back of an excavator boom cylinder that exerts a function to enhance the driver's riding comfort and reduce the risk of accidents due to inexperienced operation.
이와 같은 본 고안의 목적은 굴삭기의 붐 실린더와 상기 붐 실린더에 압유를 공급하는 유압펌프와의 사이에 상기 붐 실린더 방향절환용 붐 스풀이 설치된 붐 실린더 작동 유압회로에 있어서, 상기 붐 스풀과 상기 붐 실런더의 헤드부를 연결하는 유로상에 체크밸브 내장된 솔레노이드 밸브 A를 설치하고, 상기 솔레노이드 밸브 A에 어큐물레이터를 연결 설치하고, 붐 스풀과 붐 실린더의 로드부를 연결하는 유로상에 체크밸브가 내장된 솔레노이드 밸브 B를 설치하고, 상기 솔레노이드 밸브 B에 일정량의 배압을 형성하여 주는 리스트릭션 밸브를 연결 설치하고, 상기 리스트릭션 밸브에 탱크를 연결하는 한편, 상기 솔레노이드 밸브 A, B에 전기적신호가 인가되도록 스위치를 설치함으로써 달성된다.The object of the present invention in the boom cylinder operating hydraulic circuit is installed between the boom cylinder of the excavator and the hydraulic pump for supplying pressure oil to the boom cylinder in the boom cylinder operation hydraulic circuit, the boom spool and the boom A solenoid valve A with a check valve is installed on the flow path connecting the head of the cylinder, an accumulator is connected to the solenoid valve A, and a check valve is provided on the flow path connecting the rod portion of the boom spool and the boom cylinder. A built-in solenoid valve B is installed, and a resonance valve for forming a predetermined amount of back pressure is installed on the solenoid valve B. A tank is connected to the reduction valve, and electrical signals are applied to the solenoid valves A and B. This is accomplished by installing a switch to be applied.
이하, 본 고안을 첨부도면에 의거 상세히 설명한다.Hereinafter, the present invention will be described in detail based on the accompanying drawings.
제2도는 본 고안에 따른 충격흡수용 유압회로도이고, 제3도는 본 고안에 따른 충격흡수용 유압회로의 작동상태를 도시하는 유압회로도이다.2 is a hydraulic circuit for shock absorption according to the present invention, Figure 3 is a hydraulic circuit diagram showing the operating state of the hydraulic circuit for shock absorption according to the present invention.
본 고안은 제2도에 도시된 바와 같이 붐 실린더(10)와 상기 붐 실린더(10)에 압유를 공급하는 유압펌프(15)와의 사이에 상기 붐 실린더(10) 방향전환용 붐 스풀(13)을 설치하고, 상기 붐 스풀(13)과 붐 실린더(10)의 헤드부(12)를 연결하는 유로(25)상에 체크밸브(27)가 내장된 솔레노이드 밸브 A(20)를 설치하고, 상기 솔레노이드 밸브 A(20)에 어큐물레이터(22)를 연결 설치하고, 붐 스풀(13)과 붐 실린더(10)로 로드부(11)를 연결하는 유로(26)상에 체크밸브(28)가 내장된 솔레노이드 밸브 B(21)를 설치하고, 상기 솔레노이드 밸브 B(21)에 일정량의 배압을 형성하여 주는 리스트릭션 밸브(24)를 연결 설치하고, 상기 리스트릭션 밸브(24)에 탱크(14)를 연결하는 한편, 상기 솔레노이드 밸브A, B(20)(21)에 전기적 신호가 인가되도록 스위치(23)를 설치하여 이루어진 것이다.The present invention is a boom spool 13 for changing the direction of the boom cylinder 10 between the boom cylinder 10 and the hydraulic pump 15 for supplying pressure oil to the boom cylinder 10 as shown in FIG. And a solenoid valve A (20) having a check valve (27) built therein on a flow path (25) connecting the boom spool (13) and the head portion (12) of the boom cylinder (10). The accumulator 22 is connected to and installed on the solenoid valve A 20, and the check valve 28 is provided on the oil passage 26 connecting the rod portion 11 to the boom spool 13 and the boom cylinder 10. A built-in solenoid valve B (21) is installed, and a connection valve (24) for forming a predetermined amount of back pressure to the solenoid valve B (21) is connected and installed, and the tank (14) is connected to the reduction valve (24). On the other hand, it is made by installing a switch 23 so that an electrical signal is applied to the solenoid valves A, B (20) (21).
이와 같이 구성된 본 고안은 제3도에 도시된 바와 같이 붐 스풀(13)이 중립위치에 위치한 상태에서 스위치(22)를 온(ON) 시키면 붐 실린더(10)의 헤드부(12)는 솔레노이드 밸브A(20)를 통하여 어큐물레이터(22)에 연결되고, 붐 실린더(10)의 로드부(11)는 솔레노이드 밸브 B(21)를 통하여 탱크(14)로 연결된다.The present invention configured as described above shows that the head portion 12 of the boom cylinder 10 is a solenoid valve when the switch 22 is turned on while the boom spool 13 is located at a neutral position as shown in FIG. It is connected to the accumulator 22 via A 20, and the rod part 11 of the boom cylinder 10 is connected to the tank 14 via the solenoid valve B 21.
따라서 굴삭기의 주행시나 중량물을 들어서 옮기는 크레인 작업시에는 노면의 굴곡상태 및 장비의 급가감속등에 의하여 프론트 어태치먼트의 자중에 의한 관성력이 발생되고, 이 관성력은 충격으로서 붐 실린더 (10)의 헤드부(12)에 작용된다.Therefore, when the excavator is running or when the crane works by lifting heavy loads, the inertia force is generated by the weight of the front attachment due to the curvature of the road surface and the sudden acceleration and deceleration of the equipment. )
이와 같은 경우 종래에 있어서는 붐 스풀(13)이 중립상태로 되어 폐회로가 형성되므로 충격이 장비의 진동을 유발하지만, 본 고안에 의하면 이와 같은 충격을 어큐물레이터(22)가 흡수해 주어 진동을 억제해 주게 된다.In this case, in the related art, since the boom spool 13 is in a neutral state and a closed circuit is formed, an impact causes vibration of the equipment. However, according to the present invention, the accumulator 22 absorbs such an impact to suppress vibration. Will be done.
또한 압유가 리턴되는 라인에 일정량의 배압을 형성하여 주는 리스트 릭션 밸브(24)가 설치되어 붐 실린더(10)의 하강시 붐 실린더(10)의 로드부(11)에는 솔레노이드 밸브 B(21)에 내장된 체크밸브(28)를 통하여 메이크 업(MAKE UP)작용이 이루어 짐으로써 캐비테이션(CAVITATION)의 발생이 억제된다.In addition, a retraction valve 24 for forming a predetermined amount of back pressure in the line where the hydraulic oil is returned is installed, and the solenoid valve B 21 is provided in the rod 11 of the boom cylinder 10 when the boom cylinder 10 is lowered. The make-up (MAKE UP) is made through the built-in check valve 28 to suppress the occurrence of cavitation.
상기와 같은 본 고안에 따르면 붐 실린더의 헤드부에 발생되는 충격이 어큐물레이터에 의하여 흡수되므로 운전자의 승차감에 증진되고 운전자의 장비조작 미숙에 의한 사고가 미연에 방지됨과 동시에 메이크 업 작용에 의하여 붐 실린더의 로드부에 캐비테인션의 발생이 억제되는 효과가 생긴다.According to the present invention as described above, since the shock generated in the head of the boom cylinder is absorbed by the accumulator, the driver's riding comfort is improved, and accidents caused by the driver's inexperienced operation of the equipment are prevented in advance, and at the same time, the boom is applied by the make-up action. There is an effect that the occurrence of cavitation is suppressed in the rod portion of the cylinder.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930022964U KR970000081Y1 (en) | 1993-11-04 | 1993-11-04 | Pressure surging control circuit for an excavator boom cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930022964U KR970000081Y1 (en) | 1993-11-04 | 1993-11-04 | Pressure surging control circuit for an excavator boom cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950014679U KR950014679U (en) | 1995-06-17 |
| KR970000081Y1 true KR970000081Y1 (en) | 1997-01-04 |
Family
ID=19367087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019930022964U KR970000081Y1 (en) | 1993-11-04 | 1993-11-04 | Pressure surging control circuit for an excavator boom cylinder |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970000081Y1 (en) |
-
1993
- 1993-11-04 KR KR2019930022964U patent/KR970000081Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR950014679U (en) | 1995-06-17 |
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