KR20030016845A - a supply and exhaust structure of oil for power steering system - Google Patents

a supply and exhaust structure of oil for power steering system Download PDF

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Publication number
KR20030016845A
KR20030016845A KR1020010050621A KR20010050621A KR20030016845A KR 20030016845 A KR20030016845 A KR 20030016845A KR 1020010050621 A KR1020010050621 A KR 1020010050621A KR 20010050621 A KR20010050621 A KR 20010050621A KR 20030016845 A KR20030016845 A KR 20030016845A
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South Korea
Prior art keywords
oil
discharge
cylinder
steering system
passage
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KR1020010050621A
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Korean (ko)
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KR100432022B1 (en
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홍정표
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현대자동차주식회사
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Priority to KR10-2001-0050621A priority Critical patent/KR100432022B1/en
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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
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof
    • 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
    • B60Y2300/022—Stability in turns or during cornering

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Steering Mechanism (AREA)

Abstract

PURPOSE: An oil supply and discharge structure of a power steering system is provided to reduce water hammer by separately installing an oil supply passage and an oil discharge passage of each cylinder to prevent the collision of each supplied and discharged oil and to improve steering power by preventing a catch up through smooth oil supply and discharge. CONSTITUTION: In an oil supply and discharge structure of a power steering system, an inner portion of a rack housing(10) is divided into a left cylinder(13) and a right cylinder(14) by a piston(12) of a rack(11). Oil passages(20,30) connected to each valve body(40) are prepared in the left and right cylinders and the valve body is connected to an oil pump(50). Each discharge passage(60,70) is prepared in the left and right cylinders and the discharge passages are connected to an oil tank(80). The oil tank is connected with the oil pump. Therefore, oil is smoothly supplied and discharged upon changing a direction through additional discharge passages prepared in each cylinder so that a catch up is prevented.

Description

파워스티어링 시스템의 오일 공급 및 배출구조{a supply and exhaust structure of oil for power steering system}A supply and exhaust structure of oil for power steering system

본 발명은 파워스티어링 시스템의 오일 공급 및 배출구조에 관한 것으로, 특히 급조향시 조향조작감이 갑자기 무거워지는 캐치업(catch up)현상을 방지할 수 있도록 된 파워스티어링 시스템의 오일 공급 및 배출구조에 관한 것이다.The present invention relates to an oil supply and discharge structure of a power steering system, and more particularly, to an oil supply and discharge structure of a power steering system that is capable of preventing a catch-up phenomenon in which steering operation suddenly becomes heavy during sudden steering. will be.

자동차의 스티어링휠은 조향기구를 통하여 지면에 접촉되어 차량의 하중을 지지하고 있는 휠에 연결되어 있기 때문에 순수하게 운전자의 팔힘만으로 조향조작을 행하는 것은 매우 힘이 들며, 따라서 근래의 차량에는 대부분 유압을 이용한 파워스티어링 시스템을 적용하여 조향조작을 용이하게 할 수 있도록 되어 있다.Since the steering wheel of the car is connected to the wheel that supports the load of the vehicle by contacting the ground through the steering mechanism, it is very difficult to operate the steering wheel purely by the driver's arm force. The power steering system is used to facilitate steering operation.

상기 파워스티어링 시스템은 도 1에 개략적으로 도시된 바와 같이, 일종의 유압실린더인 랙하우징(10)의 내부에 랙(11)이 삽입되되, 이 랙(11)의 중간에는 피스톤(12)이 구비되어 랙하우징(10)의 내부가 2개의 공간 즉, 좌측실린더(13)와 우측실린더(14)로 구분되고, 이 좌측실린더(13)와 우측실린더(14)는 각각의 오일통로(20,30)를 매개로 밸브바디(40)에 연결되며, 이 밸브바디(40)는 오일펌프(50)에 연결된 구조로 되어 있다.As shown in FIG. 1, the power steering system has a rack 11 inserted into a rack housing 10, which is a kind of hydraulic cylinder, and a piston 12 is provided in the middle of the rack 11. The interior of the rack housing 10 is divided into two spaces, that is, the left cylinder 13 and the right cylinder 14, and the left cylinder 13 and the right cylinder 14 are respectively oil passages 20 and 30. It is connected to the valve body 40 via the, the valve body 40 has a structure connected to the oil pump (50).

즉, 운전자가 스티어링휠을 조작하면 스티어링샤프트에 의하여 상기 밸브바디(40)내 유로가 조정되어, 오일탱크(도시하지 않음)의 오일이 오일펌프(50)에 의하여 상기 오일통로(20,30) 중 하나의 오일통로를 통하여 좌측실린더(13)나 우측실린더(14)로 공급되고, 이때 오일을 공급받지 못하는 쪽 실린더의 오일은 해당 실린더에 연결된 오일통로를 통하여 밸브바디(40)를 거쳐 오일탱크로 회귀된 후, 오일펌프(50)를 통하여 재공급되는 오일 공급 및 배출구조를 갖추었었다.That is, when the driver operates the steering wheel, the flow path in the valve body 40 is adjusted by the steering shaft so that the oil in the oil tank (not shown) is transferred to the oil passages 20 and 30 by the oil pump 50. It is supplied to the left cylinder 13 or the right cylinder 14 through one of the oil passages, wherein the oil of the cylinder that is not supplied with oil passes through the valve body 40 through the oil body connected to the cylinder through the oil tank After returning to, it was equipped with an oil supply and discharge structure that is re-supplied through the oil pump (50).

이때 상기 피스톤(12)에 가해지는 유압에 의하여 랙(11)은 오일이 공급되지 않는 실린더 쪽으로 이동하게 되며, 이에 따라 랙(11)의 양단부에 연결된 타이로드가 너클을 연동시킴으로써 휠이 조향방향으로 회전되게 된다.At this time, the rack 11 is moved toward the cylinder which is not supplied with oil by the hydraulic pressure applied to the piston 12. Accordingly, the wheel is connected in the steering direction by the tie rods connected to both ends of the rack 11 interlocking the knuckles. Will be rotated.

한편, 상기 오일통로(20,30)들은 해당 실린더에 오일이 공급될때는 공급통로로서, 해당실린더에서 오일이 빠져 나올때는 배출통로로서 이용되게 되는데, 이러한 구조적 이유 때문에 방향전환시 즉, 오일의 배출과 공급이 전환되는 순간--도 2에 이러한 순간을 도시하였는바, 좌측실린더(13)로 오일이 공급되던중 방향전환되어 우측실린더(14)로 오일이 공급되고, 좌측실린더(13)에서는 오일이 빠져나가는 상태이다.--에는 오일통로내에서 공급오일과 배출오일이 서로 충돌하여 충격이 발생(water hammer)하여 운전감을 저하시키고, 특히 급조향시 공급되어 있던 오일이 신속하게 배출되지 못하여 타 실린더로의 신속한 오일공급을 방해함으로써 핸들이 갑자기 무거워지는 캐치업(catch up)현상이 발생하여 조향성이 저하되는 등의 문제점이 있었다.On the other hand, the oil passage (20, 30) is used as a supply passage when the oil is supplied to the cylinder, when the oil comes out of the cylinder is used as a discharge passage, for this structural reason, that is, the discharge of oil At the moment when the over-supply is switched--as shown in FIG. 2, the oil is supplied to the right cylinder 14 while the oil is supplied to the left cylinder 13 and the oil is supplied to the right cylinder 14. In this state, the supply oil and the discharge oil collide with each other in the oil passage, resulting in a water hammer, which deteriorates the feeling of operation, and in particular, the oil supplied during rapid steering cannot be discharged quickly. There is a problem that the handleability is reduced by catching phenomenon that the handle suddenly becomes heavy by interrupting the rapid oil supply to the cylinder.

특히 방향 급전환은 위급한 순간에 이루어지는 경우가 많은데, 이러한 순간에 조향성이 저하되어 차량의 진행방향을 원하는 방향으로 전환할 수 없다면 보다 큰 위험이 초래될 가능성이 높다.In particular, the direction sudden change is often made in an emergency, but if the steering is deteriorated at this moment and the direction of travel of the vehicle cannot be changed in a desired direction, there is a high possibility of causing a greater risk.

이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 발명된 것으로, 각 실린더의 오일 공급통로와 배출통로를 각각 따로 설치하여 실린더로 공급되는 오일과 배출되는 오일이 서로 충돌하지 않게 됨으로써 충돌에 의한 충격량을 저감하고, 보다 신속하고 원활하게 오일의 공급 및 배출이 이루어짐으로써 급조향시 캐치업 현상을 방지하여 조향성이 향상되도록 된 파워스티어링 시스템의 오일 공급 및 배출구조를 제공함에 그 목적이 있다.Accordingly, the present invention is invented to solve the above problems, by installing the oil supply passage and the discharge passage of each cylinder separately, so that the oil supplied to the cylinder and the discharged oil does not collide with each other, thereby reducing the impact amount due to the collision It is an object of the present invention to provide an oil supply and discharge structure of a power steering system, which reduces and reduces the supply and discharge of oil more quickly and smoothly, thereby preventing a catch-up phenomenon during rapid steering.

도 1은 종래 파워스티어링 시스템의 오일 공급 및 배출구조를 도시한 도면,1 is a view showing an oil supply and discharge structure of a conventional power steering system,

도 2는 파워스티어링 시스템의 캐치업 현상을 설명하기 위한 도면,2 is a view for explaining the catch-up phenomenon of the power steering system,

도 3 내지 도 4는 본 발명에 따른 파워스티어링 시스템의 오일 공급 및 배출구조를 도시한 도면으로서,3 to 4 is a view showing the oil supply and discharge structure of the power steering system according to the present invention,

도 3은 좌측실린더로 오일이 공급될때의 오일순환도,3 is an oil circulation diagram when the oil is supplied to the left cylinder,

도 4는 우측실린더로 오일이 공급될때의 오일순환도이다.4 is an oil circulation diagram when oil is supplied to the right cylinder.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 : 랙하우징,11 : 랙,10: rack housing, 11: rack,

12 : 피스톤,13 : 좌측실린더,12: piston, 13: left cylinder,

14 : 우측실린더,20,30 : 오일통로,14: right cylinder, 20, 30: oil passage,

40 : 밸브바디,50 : 오일펌프,40: valve body, 50: oil pump,

60,70 : 배출통로,80 : 오일탱크,60,70: discharge passage, 80: oil tank,

90,100 : 밸브장치,91,101 : 밸브하우징,90,100: Valve device, 91,101: Valve housing,

92,102 : 이동체,92a,102a : 관통구멍,92, 102: mobile body, 92a, 102a: through hole,

H1,H2: 배출홀,h1,h2: 관통홀,H 1 , H 2 : discharge hole, h 1 , h 2 : through hole,

93,103 : 스토퍼,110,120 : 연결관,93,103: stopper, 110,120: connector,

130,140 : 체크밸브,131,141 : 스토퍼.130,140: check valve, 131,141: stopper.

상기와 같은 목적을 달성하기 위한 본 발명은, 랙하우징의 내부가 이에 삽입된 랙의 피스톤에 의하여 좌측실린더와 우측실린더로 구분되고, 이 좌측실린더와 우측실린더는 각각 밸브바디에 연결되는 오일통로를 구비하며, 상기 밸브바디는 오일펌프에 연결된 파워스티어링 시스템의 오일 공급 및 배출구조에 있어서, 상기 좌측실린더와 우측실린더에 각각 오일탱크에 연결되는 배출통로가 구비되는 구조로 이루어진 것을 특징으로 한다.The present invention for achieving the above object, the interior of the rack housing is divided into the left cylinder and the right cylinder by the piston of the rack inserted therein, the left cylinder and the right cylinder are respectively connected to the oil passage connected to the valve body In the oil supply and discharge structure of the power steering system connected to the oil pump, the valve body is characterized in that the left cylinder and the right cylinder is configured to have a discharge passage connected to the oil tank, respectively.

따라서, 오일의 공급과 배출이 각각의 전용 통로를 통해서 이루어지게 됨으로써 방향전환시 오일의 충돌에 의한 충격이 최소화되고, 특히 방향전환에 따른 각 실린더로의 오일 공급과 배출이 신속하고 원활하게 이루어짐으로써 급조향시 캐치업 현상이 해소될 수 있게 된다.Therefore, the supply and discharge of oil is made through each dedicated passage to minimize the impact of the impact of the oil during the change of direction, in particular, the oil supply and discharge to each cylinder according to the change of direction is made quickly and smoothly In case of steep steering, the catch-up phenomenon can be eliminated.

이하, 본 발명을 첨부된 예시도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

도 3은 본 발명에 따른 파워스티어링 시스템의 오일 공급 및 배출구조을 도시한 도면으로서, 좌측실린더로 오일이 공급되는 상태가 도시되어 있다.3 is a view illustrating an oil supply and discharge structure of the power steering system according to the present invention, in which oil is supplied to a left cylinder.

도시된 바와 같이 본 발명은, 랙하우징(10)의 내부가 이에 삽입된 랙(11)의 피스톤(12)에 의하여 좌측실린더(13)와 우측실린더(14)로 구분되고, 이 좌측실린더(13)와 우측실린더(14)는 각각 밸브바디(40)에 연결되는 오일통로(20,30)를 구비하며, 상기 밸브바디(40)는 오일펌프(50)에 연결된 파워스티어링 시스템의 오일 공급 및 배출구조에 있어서, 상기 좌측실린더(13)와 우측실린더(14)에 각각 배출통로(60,70)가 구비되고, 이 배출통로(60,70)는 오일탱크(80)에 연결되며, 이 오일탱크(80)는 상기 오일펌프(50)에 연결된 구조로 이루어진다.As shown in the present invention, the interior of the rack housing 10 is divided into a left cylinder 13 and a right cylinder 14 by the piston 12 of the rack 11 inserted therein, and the left cylinder 13 ) And the right cylinder 14 have oil passages 20 and 30 connected to the valve body 40, respectively, and the valve body 40 supplies and discharges oil from the power steering system connected to the oil pump 50. In the structure, the discharge cylinder (60, 70) is provided in the left cylinder 13 and the right cylinder 14, respectively, the discharge passage (60, 70) is connected to the oil tank 80, the oil tank 80 is made of a structure connected to the oil pump (50).

또한, 상기 좌측실린더(13) 및 우측실린더(14)와 이 실린더들에 연결된 각 배출통로(60,70)의 사이에는 밸브장치(90,100)가 설치되는데, 이 밸브장치(90,100)들은 상기 랙하우징(11)에 장착된 밸브하우징(91,101)과, 이 밸브하우징(91,101)에 내장된 이동체(92,102)로 이루어지고, 이 이동체(92,102)의 중앙에는 관통구멍(92a,102a)이 형성되는 한편, 상기 배출통로(60,70)들이 밸브하우징(91,101)에 연결된 부분과 마주보는 랙하우징(10)상의 위치에는 배출홀(H1,H2)들이 형성된다.In addition, a valve device (90,100) is installed between the left cylinder (13) and the right cylinder (14) and each discharge passage (60,70) connected to these cylinders, the valve device (90,100) is the rack housing The valve housings 91 and 101 mounted in (11) and the movable bodies 92 and 102 embedded in the valve housings 91 and 101 are formed, and through holes 92a and 102a are formed in the center of the movable bodies 92 and 102, Discharge holes H 1 and H 2 are formed at positions on the rack housing 10 facing the discharge passages 60 and 70 connected to the valve housings 91 and 101.

또한, 상기 이동체(92,102)에 의해 구분된 밸브하우징(91,101)의 양측 공간중 상기 피스톤(12)측 공간을 해당 실린더에 연통시키는 관통홀(h1,h2)이 형성되는 한편, 반대쪽 공간은 각각의 연결관(110,120)을 통하여 반대쪽 실린더에 연결되며, 상기 관통홀(h1,h2)의 측부에는 연결관(110,120)을 통하여 유압이 전달되어이동체(92,102)가 밀려졌을 때 상기 배출홀(H1,H2)과 관통구멍(92a,102a)과 배출통로(60,70)가 서로 일치되는 위치에 멈춰지도록 스토퍼(93,103)가 형성된다.In addition, a through hole (h 1 , h 2 ) is formed in the space on both sides of the valve housing (91, 101) divided by the moving body (92, 102) to communicate the piston 12 side space with the cylinder, while the opposite space is It is connected to the opposite cylinder through each of the connecting pipe (110, 120), the hydraulic pressure is transmitted through the connecting pipe (110, 120) to the side of the through hole (h 1 , h 2 ) when the movable body (92, 102) is pushed out of the discharge hole The stoppers 93 and 103 are formed so that (H 1 , H 2 ), the through holes 92a and 102a and the discharge passages 60 and 70 stop at positions coinciding with each other.

또한, 상기 좌측실린더(13)와 우측실린더(14)에 각각 연결된 오일통로(20,30)의 출구에는 체크밸브(130,140)가 설치되며, 이 체크밸브(130,140)의 역방향 개방을 방지하는 스토퍼(131,141)가 형성된다.In addition, check valves 130 and 140 are installed at the outlets of the oil passages 20 and 30 connected to the left cylinder 13 and the right cylinder 14, respectively, and stoppers for preventing the reverse opening of the check valves 130 and 140 are provided. 131 and 141 are formed.

이제 본 발명의 작용 및 효과를 설명하기로 한다.The operation and effects of the present invention will now be described.

위에 언급한 바와 같이 도 3은 좌측실린더(13)로 오일이 공급되는 상태를 도시한 것으로서, 운전자의 조향조작에 의해 밸브바디(40)의 유로가 오일통로(20)쪽으로 개방됨과 동시에 오일펌프(50)에 의해 오일탱크(80)의 오일이 상기 밸브바디(40)와 오일통로(20)를 거쳐 좌측실린더(13)로 공급되며, 이때 상기 오일통로(20)에 설치된 체크밸브(130)는 개방된다.As mentioned above, FIG. 3 illustrates a state in which oil is supplied to the left cylinder 13, and the oil passage of the valve body 40 is opened toward the oil passage 20 by the driver's steering operation. 50, the oil of the oil tank 80 is supplied to the left cylinder 13 through the valve body 40 and the oil passage 20, wherein the check valve 130 installed in the oil passage 20 is Open.

또한, 상기와 같이 좌측실린더(13)로 오일이 공급될 때는 관통홀(h1)을 통하여 전달된 유압에 의하여 이동체(92)가 연결관(110)쪽 공간으로 이동되어 배출홀(H1)과 배출통로(60)를 연결하는 경로가 차단되며, 연결관(110)측 공간의 오일은 연결관(110)을 통해 우측실린더(14)로 유입된다.In addition, when the oil is supplied to the left cylinder 13 as described above, the moving body 92 is moved to the space of the connection pipe 110 by the hydraulic pressure transmitted through the through-hole (h 1 ) to discharge hole (H 1 ) And a path connecting the discharge passage 60 is blocked, and the oil in the space of the connection pipe 110 flows into the right cylinder 14 through the connection pipe 110.

이때, 우측실린더(14)에서는 피스톤(12)이 우측으로 이동되는 것에 의해 오일이 배출되게 되는데, 밸브바디(40)에 연결된 오일통로(30)의 출구에 설치된 체크밸브(140)가 닫혀서 오일이 역류하지 않으며, 우측실린더(14)의 밸브장치(100)는 좌측실린더(13)에 연결된 연결관(120)을 통하여 유압이 전달되어 이동체(102)가 스토퍼(103)에 닿는 위치까지 밀려짐으로써 배출홀(H2)과 관통구멍(102a)과 배출통로(70)가 일치하게 되어 오일이 배출통로(70)를 통해 오일탱크(80)로 배출된다.At this time, the oil is discharged by the piston 12 is moved to the right in the right cylinder 14, the check valve 140 installed at the outlet of the oil passage 30 connected to the valve body 40 is closed to the oil Without backflow, the valve device 100 of the right cylinder 14 is delivered with hydraulic pressure through the connecting pipe 120 connected to the left cylinder 13, so that the movable body 102 is pushed to a position where the stopper 103 comes into contact with the stopper 103. The discharge hole H 2 and the through hole 102a and the discharge passage 70 coincide with each other so that the oil is discharged into the oil tank 80 through the discharge passage 70.

즉, 좌측실린더(13)로 오일이 공급될때는 좌측실린더(13)의 체크밸브(130)는 열리고 밸브장치(90)는 닫히며, 우측실린더(14)의 체크밸브(140)는 닫히고 밸브장치(100)는 열리도록 된 것이다.That is, when oil is supplied to the left cylinder 13, the check valve 130 of the left cylinder 13 is opened and the valve device 90 is closed, and the check valve 140 of the right cylinder 14 is closed and the valve device is closed. 100 is to be opened.

한편, 조향방향이 전환되어 우측실린더(14)로 오일이 공급되는 경우에는 도 4에 도시된 바와 같이, 우측실린더(14)의 체크밸브(140)은 열리고 밸브장치(100)는 닫히며, 좌측실린더(13)의 체크밸브(130)는 닫히고 밸브장치(90)는 열리게 되는 바, 그 작동과정은 좌측실린더(13)로 오일이 공급되는 경우에 대하여 반대일 뿐이므로 상세한 설명은 생략하기로 한다.On the other hand, when the steering direction is switched to supply the oil to the right cylinder 14, as shown in Figure 4, the check valve 140 of the right cylinder 14 is opened and the valve device 100 is closed, the left Since the check valve 130 of the cylinder 13 is closed and the valve device 90 is opened, the operation thereof is only reversed to the case where the oil is supplied to the left cylinder 13, and thus the detailed description thereof will be omitted. .

이상 설명한 바와 같이, 본 발명에 따르면 어느 한쪽 실린더로 오일이 공급되다가 조향방향이 전환되어 다른쪽 실린더로 오일이 공급될 때 오일의 공급통로인 밸브바디에 연결된 오일통로의 체크밸브가 닫혀서 오일이 동일한 통로로 역류하지 않게 됨으로써 공급되는 오일과 배출되는 오일이 충돌하여 충격이 발생하지 않으며, 또한, 각 실린더에는 상기 오일통로와는 별도로 오일 배출통로가 구비되어 다른쪽 실린더로 오일이 공급됨과 동시에 배출통로가 개방되어 오일이 저항없이 배출될 수 있게 됨으로써 급조향시 오일이 신속하게 배출되지 않음으로써 발생되는 캐치업현상이 발생되지 않게 된다.As described above, according to the present invention, when the oil is supplied to one cylinder and the steering direction is switched and the oil is supplied to the other cylinder, the check valve of the oil passage connected to the valve body, which is the oil supply passage, is closed so that the oil is the same. By not flowing back into the passage, the supplied oil and the discharged oil collide with each other so that an impact does not occur. In addition, each cylinder is provided with an oil discharge passage separate from the oil passage so that oil is supplied to the other cylinder and at the same time the discharge passage. Is opened so that the oil can be discharged without resistance, so that the catch-up phenomenon caused by the oil is not discharged quickly during steep steering is not generated.

이상 설명한 바와 같이 본 발명은, 오일의 공급통로와 배출통로가 개별적으로 설치되고, 각 공급통로와 배출통로는 어느쪽 실린더로 오일이 공급되는가에 따라 적절히 개방 및 차단되어져, 방향전환시 오일역류로 인한 충격이 발생하지 않게 됨으로써 운전감이 향상되고, 캐치업현상이 방지되어 조향성이 향상되는 효과가 있다.As described above, in the present invention, the oil supply passage and the discharge passage are separately installed, and each supply passage and the discharge passage are appropriately opened and closed depending on which cylinder the oil is supplied to, and the oil reverse flow path when changing the direction. Due to the impact does not occur, the driving feeling is improved, the catch-up phenomenon is prevented and the steering is improved.

특히, 상기 캐치업현상이 방지됨으로써 급조향시에도 조향반응이 신속하게 일어나며, 이로써 위급한 상황에서도 신속하게 대처할 수 있게 되어 사고상황을 회피하거나 사고의 정도를 경감시킬 수 있게 되는 장점이 있다.In particular, since the catch-up phenomenon is prevented, a steering reaction occurs quickly even in a sudden steering, thereby being able to cope quickly even in an emergency situation, which has the advantage of avoiding an accident situation or reducing the degree of an accident.

Claims (4)

랙하우징(10)의 내부가 이에 삽입된 랙(11)의 피스톤(12)에 의하여 좌측실린더(13)와 우측실린더(14)로 구분되고, 이 좌측실린더(13)와 우측실린더(14)는 각각 밸브바디(40)에 연결되는 오일통로(20,30)를 구비하며, 상기 밸브바디(40)는 오일펌프(50)에 연결된 구조를 포함하여 이루어진 파워스티어링 시스템의 오일 공급 및 배출구조에 있어서,The interior of the rack housing 10 is divided into a left cylinder 13 and a right cylinder 14 by the piston 12 of the rack 11 inserted therein, and the left cylinder 13 and the right cylinder 14 are In each of the oil supply and discharge structure of the power steering system comprising an oil passage (20, 30) connected to the valve body 40, the valve body 40 comprises a structure connected to the oil pump (50) , 상기 좌측실린더(13)와 우측실린더(14)에 각각 배출통로(60,70)가 구비되고, 이 배출통로(60,70)는 오일탱크(80)에 연결되며, 이 오일탱크(80)는 상기 오일펌프(50)에 연결된 구조를 포함하여 이루어진 것을 특징으로 하는 파워스티어링 시스템의 오일 공급 및 배출구조.Discharge passages 60 and 70 are provided in the left cylinder 13 and the right cylinder 14, respectively, and the discharge passages 60 and 70 are connected to the oil tank 80, and the oil tank 80 is Oil supply and discharge structure of the power steering system, characterized in that it comprises a structure connected to the oil pump (50). 제 1항에 있어서, 상기 좌측실린더(13) 및 우측실린더(14)와 이들에 연결되는 배출통로(60,70)의 사이에는 해당 실린더로 오일이 공급될 때 닫혀지고 타 실린더로 오일이 공급될 때 열려지는 밸브장치(90,100)가 설치되는 것을 특징으로 하는 파워스티어링 시스템의 오일 공급 및 배출구조.The method of claim 1, wherein the left cylinder (13) and the right cylinder (14) between the discharge passage (60, 70) connected to them is closed when the oil is supplied to the cylinder and the oil to be supplied to the other cylinder Oil supply and discharge structure of the power steering system, characterized in that the valve device (90,100) that is opened when installed. 제 2항에 있어서, 상기 밸브장치(90,100)는 랙하우징(10)에 장착된 밸브하우징(91,101)에 관통구멍(92a,102a)이 형성된 이동체(92,102)가 내장되어 이루어지고, 상기 배출통로(60,70)와 마주보는 랙하우징(10)상의 위치에는 배출홀(H1,H2)이형성되며, 상기 이동체(92,102)에 의해 구분된 밸브하우징(91,101)의 양측 공간중 상기 피스톤(12)측 공간을 해당 실린더에 연통시키는 관통홀(h1,h2)이 형성되고, 반대쪽 공간은 각각의 연결관(110,120)을 통하여 반대쪽 실린더에 연결되며, 상기 관통홀(h1,h2)의 측부에는 이동체(92,102)의 관통구멍(92a,102a)과 상기 배출홀(H1,H2)과 배출통로(60,70)가 서로 일치되는 위치에 멈춰지도록 스토퍼(93,103)가 형성되는 구조로 이루어진 것을 특징으로 하는 파워스티어링 시스템의 오일 공급 및 배출구조.According to claim 2, The valve device (90,100) is a valve housing (91,101) mounted to the rack housing 10 is made of a moving body (92,102) having a through hole (92a, 102a) is built in, the discharge passage ( Discharge holes H 1 and H 2 are formed at positions on the rack housing 10 facing the 60 and 70, and the piston 12 is formed in both spaces of the valve housings 91 and 101 separated by the moving bodies 92 and 102. Through-holes h 1 and h 2 are formed to communicate the side spaces to the corresponding cylinders, and the opposite spaces are connected to the opposite cylinders through respective connecting pipes 110 and 120, and the through-holes h 1 and h 2 are formed. The stopper (93, 103) is formed in the side portion so that the through holes (92a, 102a) of the moving body (92,102), the discharge holes (H 1 , H 2 ) and the discharge passage (60, 70) is stopped at a position coinciding with each other. Oil supply and discharge structure of the power steering system, characterized in that made. 제 1항에 있어서, 상기 오일통로(20,30)의 출구에는 체크밸브(130,140)가 설치되며, 이 체크밸브(130,140)의 역방향 개방을 차단하는 스토퍼(131,141)가 형성되는 것을 특징으로 하는 파워스티어링 시스템의 오일 공급 및 배출구조.According to claim 1, wherein the outlet of the oil passage (20, 30) is provided with check valves (130, 140), the stopper (131, 141) for blocking the reverse opening of the check valve (130, 140) is characterized in that the power is formed Oil supply and drainage structure of the steering system.
KR10-2001-0050621A 2001-08-22 2001-08-22 a supply and exhaust structure of oil for power steering system KR100432022B1 (en)

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Publication number Priority date Publication date Assignee Title
CN108488107A (en) * 2018-04-13 2018-09-04 盐城市协和机械有限公司 A kind of oil route controller of cutting machine

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KR100471894B1 (en) * 2002-11-28 2005-03-09 현대자동차주식회사 Hydraulic power steering for vehicle

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KR100276713B1 (en) * 1997-12-30 2001-01-15 정몽규 Hydraulic auxiliary force variable device of power steering
KR100288342B1 (en) * 1999-02-08 2001-04-16 이계안 power steering system for vehicle
KR100452298B1 (en) * 2000-12-27 2004-10-12 주식회사 만도 Damping valve steering device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108488107A (en) * 2018-04-13 2018-09-04 盐城市协和机械有限公司 A kind of oil route controller of cutting machine
CN108488107B (en) * 2018-04-13 2024-04-05 江苏协和机械科技有限公司 Oil circuit control device of cutting machine

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