KR970003521Y1 - Power steering oil line - Google Patents
Power steering oil line Download PDFInfo
- Publication number
- KR970003521Y1 KR970003521Y1 KR2019940039453U KR19940039453U KR970003521Y1 KR 970003521 Y1 KR970003521 Y1 KR 970003521Y1 KR 2019940039453 U KR2019940039453 U KR 2019940039453U KR 19940039453 U KR19940039453 U KR 19940039453U KR 970003521 Y1 KR970003521 Y1 KR 970003521Y1
- Authority
- KR
- South Korea
- Prior art keywords
- pilot
- pressure oil
- control valve
- pump
- valve
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/30—Safety devices, e.g. alternate emergency power supply or transmission means to ensure steering upon failure of the primary steering means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/40—Special vehicles
- B60Y2200/41—Construction vehicles, e.g. graders, excavators
- B60Y2200/415—Wheel loaders
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
내용없음.None.
Description
제1도는 본 고안의 의한 유압회로도.1 is a hydraulic circuit diagram of the present invention.
제2도는 종래 기술에 의한 유압회로도이다.2 is a hydraulic circuit diagram according to the prior art.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 메인펌프 2 : 파일럿 압유공압 유니트1: Main Pump 2: Pilot Hydraulic Pneumatic Unit
4 : 어큐물레이터 5 : 파일럿 콘트롤밸브4: Accumulator 5: Pilot Control Valve
6, 7 : 프라이 오리티 밸브 10 : 비상조향 펌프6, 7: fry orifice valve 10: emergency steering pump
11 : 탱크11: tank
본 고안은 휠로우더에서 비상조향펌프에 의해 파일럿 압유를 공급하는 유압회로에 관한 것으로, 특히 트랜스밋션에 직결된 상시 구동형 양방향 회전 비상 조향장치용 유압펌프에 의해 파일럿 콘트롤 밸브로 압유를 공급토록하여 메인펌프로 부터 상기 파일럿 콘트롤 밸브로 압유가 누설됨 없이 작업기에 공급되도록 하여 작업기의 작업능률을 향상시킨 휠로우더의 파일럿 압유공급 회로에 관한 것이다.The present invention relates to a hydraulic circuit for supplying pilot pressure oil by an emergency steering pump in a wheel loader, and in particular, to supply pressure oil to a pilot control valve by a hydraulic pump for a normally driven bidirectional rotary emergency steering device directly connected to a transmission. The present invention relates to a pilot pressure oil supply circuit of a wheel loader in which pressure oil is supplied from the main pump to the pilot control valve without leakage, thereby improving work efficiency of the work machine.
종래의 휠로우더의 파일럿 압유공급 회로는 제2도에 도시된 바와 같이 메인펌프(1)는 파일럿 압유공급유니트(2)와프라이오리티밸브(7)로 분리 연결되고, 감압밸브(3)와 어큐물레이터(4)로 구성된 상기 파이럿 압유공급 유니트(2)는 파일럿 콘트롤밸브(5)와 연결되며, 상기 프라이오리티밸브(7)는 작업기(8)와 조향장치(9)에 선택적으로 압유를 공급하도록 연결되어 있다.In the pilot pressure oil supply circuit of the conventional wheel loader, as shown in FIG. 2, the main pump 1 is separated and connected to the pilot pressure oil supply unit 2 and the prioity valve 7, and the pressure reducing valve 3 is The pilot pressure oil supply unit 2, which is composed of a cumulator 4, is connected to a pilot control valve 5, and the priometry valve 7 selectively feeds pressure oil to the work machine 8 and the steering device 9. It is connected to supply.
또한 비상조향펌프(10)는 프라이오리티밸브(6)를 사이에 두고 조향장치(9)와 탱크(11)에 선택적으로 압유를 공급하도록 연결 되어 있다.In addition, the emergency steering pump 10 is connected to selectively supply pressure oil to the steering apparatus 9 and the tank 11 with the prioity valve 6 interposed therebetween.
이상과 같은 종래의 회로에서는 메인펌프(1)로 부터의 압유가 파일럿 콘트롤밸브(5)와 작업기(8)등에 동시에 공급되도록 되어 있으므로,In the conventional circuit as described above, since the pressure oil from the main pump 1 is supplied to the pilot control valve 5 and the work machine 8 at the same time,
상기 파일럿 콘트롤밸브(5)에 공급되는 압유량 만큼 작업기(8)에 공급되는 압유량이 줄어들게 되어 상대적으로 작업기의 작동속도를 저하시키게 되는 문제점이 있으며, 비상향조향펌프(10)로부터 공급되는 압유는 조향휠을 조작하지 않는 때에는 동력원으로 사용되지 못하고 탱크(11)로 모두 귀환되므로 동력손실이 생기는 문제점이 있었다.The amount of pressure oil supplied to the work machine 8 is reduced by the amount of pressure oil supplied to the pilot control valve 5, thereby reducing the operating speed of the machine relatively. When the steering wheel is not operated, there is a problem that the power loss occurs because it is not used as a power source and all are returned to the tank 11.
이상과 같은 문제점을 해결코자 본 고안에서는 비상조향펌프와 파일럿 콘트롤 밸브를 연결하여 비상조향펌프의 사용 효율을 향상시키고, 메인펌프로 부터의 압유가 파일럿 콘트롤 밸브에 공급됨 없이 작업기에 공급되도록 하여 작업기의 작동 속도 저하를 방지케 하는데에 그 목적이 있다.In order to solve the above problems, the present invention improves the efficiency of use of the emergency steering pump by connecting the emergency steering pump and the pilot control valve, and the pressure oil from the main pump is supplied to the working machine without being supplied to the pilot control valve. The purpose is to prevent the degradation of the operating speed.
첨부도면에 의해 본 고안 내용을 상세히 설명하면 다음과 같다.Referring to the present invention in detail by the accompanying drawings as follows.
도시된 바와 같이, 메인펌프(1)가 작업기(8)에 연결되고, 비상조향펌프(10)는 조향장치에 연결된 휠로우더의 유압장치에 있어서, 상기한 비상조향펌프(10)는 프라이오리티밸브(6)를 사이에 두고 파일럿 콘트롤밸브(5)와 연결된 파일럿 오일 공급 유니트(2)에 연결되고, 상기 프라이오리티밸브(6)는 조향장치(9)에도 선택적으로 압유를 공급토록 연결된다.As shown, the main pump (1) is connected to the work machine (8), the emergency steering pump (10) in the hydraulic device of the wheel loader connected to the steering device, the emergency steering pump (10) is It is connected to a pilot oil supply unit 2 which is connected to a pilot control valve 5 with a valve 6 interposed therebetween, and the priority valve 6 is also connected to the steering system 9 to supply pressure oil selectively. .
또한 메인펌프(1)는 파일럿 콘트롤밸브(5)와 연결되지 않고 프라이오리티밸브(7)를 사이에 두고 작업기(8) 및 조향장치(9)와 연결되어 있다.In addition, the main pump 1 is not connected to the pilot control valve 5, but is connected to the work machine 8 and the steering apparatus 9 with the priority valve 7 interposed therebetween.
이와 같이 구성된 본 고안 유압회로에 따른 작동 및 효과는 다음과 같다.Operation and effects according to the present invention hydraulic circuit configured as described above are as follows.
원동기의 트랜스 밋션에 직결된 비상조향펌프(10)는 원동기가 구동됨에 따라 작동되며 상기 펌프(10)로 부터의 압유는 조향휠이 조작되는 경우에는 조향장치(9)로 공급되지만 나머지 경우에는 프라이오리티밸브(6)와 파일럿 오일 공급 유니트(2)를 경유하여 파일럿 콘트롤밸브(5)로 공급된다.The emergency steering pump 10 directly connected to the transmission of the prime mover is operated as the prime mover is driven, and the pressure oil from the pump 10 is supplied to the steering device 9 when the steering wheel is operated, but in the other case, It is supplied to the pilot control valve 5 via the orifice valve 6 and the pilot oil supply unit 2.
또한 조향휠이 조작되는 경우에도 상기 파일럿 압유 공급 유니트(2)의 어큐물레이터(4)가 축압된 상태가 되므로 계속적으로 파일럿 콘트롤 밸브(5)로 압유가 공급되는 것이다.In addition, even when the steering wheel is operated, the accumulator 4 of the pilot pressure oil supply unit 2 is in a compressed state, so that the pressure oil is continuously supplied to the pilot control valve 5.
그리고 메인펌프(1)에서 공급된 압유는 파일럿 콘트롤밸브(5)로 누설됨 없이 프라이오리티밸브(7)를 통해서 작업기(8)와 조향장치(9)에만 선택적으로 공급되게 되므로 작업기(8)의 작동속도를 증가시켜 작업능률을 향상시킬 수 있는 것이다.In addition, since the pressurized oil supplied from the main pump 1 is selectively supplied only to the work machine 8 and the steering device 9 through the priometry valve 7 without leaking to the pilot control valve 5, the work machine 8 is provided. By increasing the operating speed of the work can improve the efficiency.
이와 같은 본 고안인 유압회로에서는 종래에는 탱크(11)로 그냥 귀한되던 비상조향펌프(10)로 부터의 압유를 종래에 메인펌프(1)로부터 압유를 공급받던 마일럿 콘트롤밸브(5)의 공급용 압유로서 활용할 수 있으므로, 작업기(8)의 작동속도를 증가시켜 작업능률을 향상시킬 수 있을 뿐만 아니라 비상조향펌프(10)의 사용효율도 향상시키는 유용한 고안이다.In the hydraulic circuit of the present invention as described above, the oil pressure from the emergency steering pump 10, which was conventionally simply returned to the tank 11, is supplied to the pilot control valve 5, which is conventionally supplied with pressure oil from the main pump 1. Since it can be utilized as pressure oil, it is a useful design to improve the working efficiency of the emergency steering pump 10 as well as to improve the working efficiency by increasing the operating speed of the work machine (8).
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940039453U KR970003521Y1 (en) | 1994-12-31 | 1994-12-31 | Power steering oil line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940039453U KR970003521Y1 (en) | 1994-12-31 | 1994-12-31 | Power steering oil line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960022176U KR960022176U (en) | 1996-07-20 |
| KR970003521Y1 true KR970003521Y1 (en) | 1997-04-17 |
Family
ID=19405554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019940039453U KR970003521Y1 (en) | 1994-12-31 | 1994-12-31 | Power steering oil line |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970003521Y1 (en) |
-
1994
- 1994-12-31 KR KR2019940039453U patent/KR970003521Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR960022176U (en) | 1996-07-20 |
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