KR0151532B1 - Power steering system for automobiles - Google Patents
Power steering system for automobilesInfo
- Publication number
- KR0151532B1 KR0151532B1 KR1019950062473A KR19950062473A KR0151532B1 KR 0151532 B1 KR0151532 B1 KR 0151532B1 KR 1019950062473 A KR1019950062473 A KR 1019950062473A KR 19950062473 A KR19950062473 A KR 19950062473A KR 0151532 B1 KR0151532 B1 KR 0151532B1
- Authority
- KR
- South Korea
- Prior art keywords
- steering
- piston
- flow path
- rack
- power steering
- Prior art date
Links
Classifications
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- 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
- B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
- B62D5/12—Piston and cylinder
-
- 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
- B62D5/08—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of steering valve used
- B62D5/083—Rotary valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2300/00—Purposes or special features of road vehicle drive control systems
- B60Y2300/02—Control of vehicle driving stability
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
Abstract
본 발명은 자동차의 주행시 회전하다가 직진주행할 때 자동차용 휠의 복원력을 향상시킬 수 있도록 한 자동차용 파워스티어링 조향장치에 관한 것이다.The present invention relates to a power steering steering apparatus for a vehicle that can improve the restoring force of a wheel for a vehicle when the vehicle travels while driving straight.
본 발명은 랙튜브 내부의 실린더 양단에 랙바에 고정된 피스톤을 중립으로 되게 유로를 형성한 후 분배 실린더를 설치하여 리턴호오스에 가해지는 유압으로 좌·우 조타시는 유로를 차단하고 로타리밸브의 중립시에는 유로를 열어 피스톤의 움직임을 자유로히 하므로서 복원력 향상을 꾀할 수 있도록 한 것이 그 특징이다.The present invention forms a flow path in which the pistons fixed to the rack bars are neutral at both ends of the cylinders inside the rack tube, and then installs a distribution cylinder to shut off the flow path when hydraulic pressure is applied to the return hose and shuts off the flow path and neutralizes the rotary valve. It is characterized by opening the flow path to free the movement of the piston to improve the restoring force.
Description
제1도는 본 발명이 적용된 파워스티어링 조향장치의 개략도.1 is a schematic diagram of a power steering steering apparatus to which the present invention is applied.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 조향장치 2 : 랙튜브1: Steering device 2: Rack tube
3 : 랙바 4,8 : 피스톤3: rack bar 4,8: piston
5 : 좌실린더 5' : 우실린더5: left cylinder 5 ': right cylinder
6 : 로타리밸브 7 : 분배실린더6: Rotary Valve 7: Distribution Cylinder
9 : 포트 10 : 스프링9: port 10: spring
11 : 펌프 12 : 리턴호오스11: pump 12: return hose
본 발명은 자동차의 조향을 원활하게 할 수 있는 자동차용 파워스티어링 조향장치에 관한 것으로서, 특히 자동차의 주행시 회전하다가 직진주행할 때 자동차용 휠의 복원력을 향상시킬 수 있도록 한 자동차용 파워스티어링 조향장치에 관한 것이다.The present invention relates to a power steering steering apparatus for an automobile capable of smoothly steering a vehicle, and more particularly, to a power steering steering apparatus for an automobile that can improve the restoring force of an automobile wheel when the vehicle is driven while driving straight. It is about.
일반적으로 자동차용 파워스티어링 조향장치는 조향핸들을 고정한 조향축을 기어박스와 연결하되 기어박스에는 랙바를 설치하여 조향축의 위엄기어와 맞물린 상태로 조립하고, 기어박스의 일측에는 랙튜브를 연장설치한 후 랙바의 중앙에는 피스톤을 설치하여 양측에 실린더를 구획하여 상기 양측의 실린더에는 유압밸브에 의해 좌·우스티어링시 오일을 공급하여 파워스티어링 될 수 있도록 한 것은 주지된 사실이다.In general, the power steering steering device for automobiles connects a steering shaft fixed with a steering wheel to a gear box, and installs a rack bar on the gear box to mate with the dignity gear of the steering shaft, and extends the rack tube on one side of the gear box. It is well known that pistons are installed at the center of the rack bar to partition cylinders on both sides so that the cylinders on both sides can be powered by oil when left and right steering is carried out by hydraulic valves.
그러나 종래의 자동차용 파워스티어링 조향장치는 기어박스 일측에 연장설치한 랙튜브 내의 랙바에 피스톤을 고정설치하여 좌·우실린더를 구획형성하고, 상기 좌·우실린더에는 조향핸들의 좌·위회전에 의해 오일을 공급할 수 있도록 한 유압밸브와 연결한 상태로 구성되었다.However, a conventional power steering steering device for automobiles is formed by partitioning a piston in a rack bar in a rack tube extended to one side of a gear box to form a left and right cylinder, and in the left and right cylinders, a left and right rotation of a steering wheel is performed. It is connected to the hydraulic valve so that oil can be supplied.
이와 같이 구성된 파워스티어링 조향장치는 유압밸브를 이용한 실린더 타입의 조향장치로서, 조향핸들의 조화시 스티어링 기어박스 일측에 연장 조립된 랙튜브의 실린더 좌·우측에 유압을 공급하여 조향을 용이하게 하는 것인데 이때 조향핸들에 회전력이 전달되지 않을 경우에는 유압은 리턴호스를 통하여 빠져나가도록 설계되었다.The power steering steering device configured as described above is a cylinder type steering device using a hydraulic valve, and when steering the steering wheel, hydraulic power is supplied to the left and right cylinders of the rack tube extended to one side of the steering gear box to facilitate steering. At this time, when the rotational force is not transmitted to the steering wheel, the hydraulic pressure is designed to exit through the return hose.
따라서 굴곡도로 선회시 조향핸들을 조타한 후 유압밸브가 중립인 경우에는 랙튜브 내의 실린더 유량이 단면적이 적은 밸브를 유동하여야 하므로 랙바에 설치된 피스톤이 원화치 않아 복원력이 저하되게 되는 문제점 등이 야기 하였다.Therefore, if the hydraulic valve is neutral after steering the steering wheel during turning on the curved road, the cylinder flow rate in the rack tube should flow with a small cross-sectional area, which causes problems such as the loss of the restoring force because the piston installed in the rack bar is not original. .
본 발명은 상기한 종래의 제문제점등을 해결하기 위하여 안출한 것으로서 본 발명의 그주된 목적으론, 랙튜브 내부의 실린더 양단에 랙바에 고정된 피스톤을 중립으로 되게 유로를 형성한 후 분배 실린더를 설치하여 리턴호오스에 가해지는 유압으로 좌·우 조타시는 유로를 차단하고 로타리밸브의 중립시에는 유로를 열어 피스톤을 움직임을 자유로히 하므로서 복원력 향상을 꾀할 수 있도록 한 것이 그 특징이다.The present invention has been made to solve the above-mentioned problems, the main purpose of the present invention, the distribution cylinder is installed after forming a flow path to be neutral to the piston fixed to the rack bar on both ends of the cylinder inside the rack tube Therefore, the hydraulic power applied to the return hose shuts off the flow path when steering the left and right, and when the rotary valve is neutral, the flow path is opened to free the piston and the restoring force is improved.
상기의 목적을 달성할 수 있는 본 발명을 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.The present invention which can achieve the above object will be described in detail with reference to the accompanying drawings.
제1도는 본 발명이 적용된 파워스티어링 조향장치의 개략도이다.1 is a schematic diagram of a power steering steering apparatus to which the present invention is applied.
제1도에서와 같이 자동차의 조향핸들 회전력을 좌·우 습동하여 진행방향을 조향하는 조향장치(1)는 기어박스 일측에 랙튜브(2)를 연장설치하고 랙튜브(2) 내부에는 랙바(3)를 설치한다.As shown in FIG. 1, the steering apparatus 1 which steers the steering wheel rotational force of the vehicle to the left and right to steer the traveling direction extends the rack tube 2 on one side of the gear box and the rack bar inside the rack tube 2. 3) Install.
그리고 상기 랙바(3)의 중앙에는 피스톤(4)을 고정설치하여 좌·우실린더(5)(5')를 구획되게 형성하여 유압밸브와 연통되게 설치한다.In addition, the piston 4 is fixedly installed at the center of the rack bar 3 to form left and right cylinders 5 and 5 'so as to be in communication with the hydraulic valve.
한편 상기 좌·우실린더(5)(5')에는 양실린더에 분배공급 또는 차단할 수 있도록 분배실린더(7)를 설치하되, 상기 분배실린더(7)의 내부에는 포트(9)가 형성된 피스톤(8)을 스프링(10)을 탄설한 상태로 설치하고 분배실린더(7)의 상측에는 로타리밸브(6)와 연결하고, 분배실린더(7)의 피스톤(8) 상측으론 오일을 펌프(11)로 리턴시킬 수 있는 리턴호오스(12)를 설치하여서 된 것이다.On the other hand, the left and right cylinders (5) (5 ') is provided with a dispensing cylinder (7) to distribute or supply to both cylinders, the piston (8) having a port (9) formed inside the dispensing cylinder (7) ) Is installed with the spring (10) in a solid state, connected to the rotary valve (6) on the upper side of the dispensing cylinder (7), and return oil to the pump (11) above the piston (8) of the dispensing cylinder (7). By installing a return hose 12 that can be made.
이와 같이 구성된 본 발명은 조향장치(1)의 기어박스 일측에 랙튜브(2)를 연장설치하고 랙튜브(2)의 내부에는 랙바(3)를 좌·우 습동되게 설치한다.The present invention configured as described above extends the rack tube 2 on one side of the gear box of the steering apparatus 1 and installs the rack bar 3 inside the rack tube 2 so as to slide left and right.
그리고 상기 랙바(3)에는 피스톤(4)을 고정설치하여 좌·우실린더(5)(5')에는 조향핸들의 조타시 로타리 밸브(6)의 작동에 의해 유압을 공급할시에는 펌프(11)와 연결된 리턴호오스(12)에 가해지는 유압을 이용하여 분배실린더(7)내의 피스톤(8)이 스프링(10)의 스프링력에 의해 상측으로 올라와 피스톤(8)의 포트(9)와 유로가 어긋나게 되어 유로를 차단한다.A piston 4 is fixedly installed at the rack bar 3 so that the pump 11 is supplied to the left and right cylinders 5 and 5 'to supply hydraulic pressure by operating the rotary valve 6 when steering the steering wheel. By using the hydraulic pressure applied to the return hose 12 connected with the piston, the piston 8 in the distribution cylinder 7 rises upward by the spring force of the spring 10 so that the flow path of the piston 9 and the port 9 of the piston 8 are shifted. To block the flow path.
이때, 상기 로타리밸브(6)에서 공급되는 유압은 리턴호오스(12)를 통하여 펌프(11)로 리턴시킨다.At this time, the hydraulic pressure supplied from the rotary valve 6 is returned to the pump 11 through the return hose 12.
그리고 로타리밸브(6)의 중립으로 주행을 직진할시에는 로타리밸브(6)의 유압에 의해 분배실린더(7) 내부의 피스톤(8)을 밀고 스프링(10)을 압축시킨 상태로 피스톤(8)이 하향으로 내려가 피스톤(8)의 포트(9)와 유로가 항시 개방되어 랙튜브(2) 내부의 랙바(7)에 고정설치된 피스톤(8)의 움직임을 자유롭게 하여 직진 복원력이 향상되는 것이다.When traveling straight to the neutral of the rotary valve 6, the piston 8 is pushed in a state in which the piston 8 is pushed in the distribution cylinder 7 by the hydraulic pressure of the rotary valve 6 and the spring 10 is compressed. The port 9 and the flow path of the piston 8 are lowered downward so as to freely move the piston 8 fixed to the rack bar 7 inside the rack tube 2 so that the straight restoring force is improved.
이상 설명한 바와 같이 랙튜브 내부의 실린더 양단에 피스톤이 중립으로 되게 유로를 형성한 후 분배실린더를 설치하여 리턴호오스에 가해지는 유압을 이용하여 조향 핸들의 좌·우 조타시에는 유로를 차단토록 하고 로타리밸브의 중립시에는 유로를 열어 피스톤의 움직임을 자유로히 하므로서 직진복원력을 가일층 높게 꾀할 수 있도록 한 조향장치이다.As described above, after the piston is formed at both ends of the cylinder inside the rack tube, the flow path is formed to be neutral, and the distribution cylinder is installed so that the flow path is blocked when steering the steering wheel left and right by using hydraulic pressure applied to the return hose. When the valve is neutral, it is a steering device that opens the flow path and frees the movement of the piston so that the linear restoring force can be further increased.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950062473A KR0151532B1 (en) | 1995-12-28 | 1995-12-28 | Power steering system for automobiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950062473A KR0151532B1 (en) | 1995-12-28 | 1995-12-28 | Power steering system for automobiles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR970041000A KR970041000A (en) | 1997-07-24 |
| KR0151532B1 true KR0151532B1 (en) | 1998-09-15 |
Family
ID=19446234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019950062473A KR0151532B1 (en) | 1995-12-28 | 1995-12-28 | Power steering system for automobiles |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0151532B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013089287A1 (en) * | 2011-12-13 | 2013-06-20 | 볼보 컨스트럭션 이큅먼트 에이비 | Steering system for wheeled construction equipment |
-
1995
- 1995-12-28 KR KR1019950062473A patent/KR0151532B1/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013089287A1 (en) * | 2011-12-13 | 2013-06-20 | 볼보 컨스트럭션 이큅먼트 에이비 | Steering system for wheeled construction equipment |
| CN103987612A (en) * | 2011-12-13 | 2014-08-13 | 沃尔沃建造设备有限公司 | Steering system for wheeled construction equipment |
| US9248855B2 (en) | 2011-12-13 | 2016-02-02 | Volvo Construction Equipment Ab | Steering system for wheeled construction equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| KR970041000A (en) | 1997-07-24 |
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