KR20070088072A - Power steering rotary valve strcuture for damping - Google Patents

Power steering rotary valve strcuture for damping Download PDF

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Publication number
KR20070088072A
KR20070088072A KR1020060018217A KR20060018217A KR20070088072A KR 20070088072 A KR20070088072 A KR 20070088072A KR 1020060018217 A KR1020060018217 A KR 1020060018217A KR 20060018217 A KR20060018217 A KR 20060018217A KR 20070088072 A KR20070088072 A KR 20070088072A
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South Korea
Prior art keywords
oil
valve body
flow path
valve
passage
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KR1020060018217A
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Korean (ko)
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KR100803849B1 (en
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강도갑
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기아자동차주식회사
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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
    • B62D5/08—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
    • 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
    • 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
    • B62D5/0837—Rotary valves characterised by the shape of the control edges, e.g. to reduce noise
    • 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
    • B62D5/20—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application
    • B62D5/22—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle specially adapted for particular type of steering gear or particular application for rack-and-pinion type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves

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

Abstract

A power steering rotary valve for damping is provided to make use of resistant force of working fluid against steering auxiliary force to effectively reduce vibration from a power steering system. A power steering rotary valve for damping comprises a valve body(40) having an oil feed channel(46) fed with oil from an oil pump, and passage channels(41, 42) feeding or returning the oil, fed from the oil pump, to a power cylinder; and a valve shaft(30) rotatably coupled in the valve body and having a channel groove(33a) opening and closing a channel of the valve body. The valve body includes an oil return channel(43), in an inner circumference thereof, which guides a fluid returned from the power cylinder to an oil tank(T). The valve shaft includes an oil feed groove(33a), which guides the oil from the oil feed channel to the oil return channel, and an orifice defining grooves(33b, 33c), which define a narrow channel of the fluid returned from the oil return channel.

Description

셔더개선을 위한 파워스티어링 로터리 밸브구조{Power steering rotary valve strcuture for damping}Power steering rotary valve strcuture for damping

도 1은 , 종래 로터리 밸브의 구조와 밸브의 구조를 보인 단면도로, 밸브의 동작상태를 도시한 것이다.1 is a cross-sectional view showing the structure of a conventional rotary valve and the structure of the valve, showing the operating state of the valve.

도 2는 , 본 발명에 따른 로터리밸브의 구조를 보인 단면도이다.2 is a cross-sectional view showing the structure of a rotary valve according to the present invention.

도 3은 , 밸브 샤프트의 회전시 본 발명에 따른 로터리밸브구조와 오일의 흐름을 표시한 단면도이다.3 is a cross-sectional view showing the flow of the rotary valve structure and oil according to the present invention when the valve shaft is rotated.

도 4은 , 본 발명에 따른 로터리밸브의 전체적인 구성을 보인 종단면도이다. 4 is a longitudinal sectional view showing the overall configuration of a rotary valve according to the present invention.

도 5는 , 본 발명에 따른 진동감소에대한 실험데이터이다.5 is experimental data on vibration reduction according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

30 : 밸브샤프트, 32: 토션바30: valve shaft, 32: torsion bar

33a : 공급유로홈 33b,33c: 오리피스형성홈 33a: Supply flow path groove 33b, 33c: Orifice forming groove

40 : 밸브바디 41,42: 밸브바디의 통로유로 40: valve body 41, 42: passage passage of the valve body

43 : 오일복귀유로 46: 오일공급유로43: oil return passage 46: oil supply passage

47 : 오일복귀공 47: oil return hole

본 발명은 차량용 동력조향장치에 관한 것으로서, 특히 셔더개선을 위해 밸브바디와 밸브샤프트의 상대변위에 의해 오일펌프로부터 파워실린더로 공급되는 작동유체의 흐름을 제어하는 로터리밸브의 구조에 관한 것이다. The present invention relates to a power steering device for a vehicle, and more particularly, to a structure of a rotary valve for controlling the flow of a working fluid supplied from an oil pump to a power cylinder by a relative displacement of a valve body and a valve shaft for improving the rudder.

도 1은 일반적인 종래 로터리 밸브 구조를 나타낸 단면도이다.1 is a cross-sectional view showing a general conventional rotary valve structure.

종래기술에 따른 로터리밸브는 조향핸들과 함께 회전되도록 조향핸들측의 입 력축에 연결되는 밸브샤프트(10)와, 상기 밸브샤프트의 외주부에 장착되며 바퀴측의 피니언축과 함께 회전되도록 피니언축에 결합되는 원통상의 밸브바디(20)가 구비되어 있다.Rotary valve according to the prior art is coupled to the pin shaft to be mounted to the valve shaft (10) connected to the input shaft of the steering handle side to rotate with the steering wheel, the outer peripheral portion of the valve shaft and to rotate with the pinion shaft of the wheel side A cylindrical valve body 20 is provided.

밸브샤프트(10)의 외주면에는 축방향으로 길게 형성되며 외주면에 등간격을 이루도록 형성되는 유로홈(11)이 마련되는데, 이들 유로홈(11)은 유체의 공급을 안내하는 공급유로홈(11a)와 유체의 복귀를 안내하는 복귀유로홈(11b)를 이루게된다. 그리고, 유로홈의 복귀유로홈(11b)에는 밸브샤프트(10)의 내측 중공부(12)와 연통되는 복귀공(13)이 형성되어 있다.  The outer circumferential surface of the valve shaft 10 is provided with a flow path groove 11 which is formed long in the axial direction and formed at equal intervals on the outer circumferential surface, and these flow path grooves 11 are supply flow path grooves 11a for guiding the supply of fluid. And a return flow path groove 11b for guiding the return of the fluid. In addition, a return hole 13 communicating with the inner hollow part 12 of the valve shaft 10 is formed in the return flow path groove 11b of the flow path groove.

또한, 밸브샤프트(10)의 외주면과 접하는 밸브바디(20)의 내주면에는 밸브샤프트와 마찬가지로 축방향으로 길게 형성 되며 상호등간격을 이루도록 형성되는 다수의 유로들(21,22,26)이 마련되어 있다. 그리고 밸브바디(20)의 파워실린더로의 일측통로유로(21)와 타측통로유로(22)사이의 랜드면에는 오일펌프(P)에서 공급되는 유체가 유입되는 오일공급유로(26)가 형성되어 있다.In addition, on the inner circumferential surface of the valve body 20 in contact with the outer circumferential surface of the valve shaft 10, a plurality of flow paths 21, 22, and 26 are formed in the axial direction and are formed to form the same interval as in the valve shaft. . In addition, an oil supply passage 26 through which the fluid supplied from the oil pump P flows is formed on the land surface between the one passage passage 21 and the other passage passage 22 to the power cylinder of the valve body 20. have.

상기와 같이 구성된 종래 기술의 동작을 살펴보면 다음과 같다. Looking at the operation of the prior art configured as described above are as follows.

도면1과같이 조향핸들의 회전으로 상기밸브샤프트(10)가 소정의 각도만큼 화살표방향으로 회전하게되면 , 밸브샤프트(10)의 유로홈중에서 상기공급유로홈(11a)은 오일공급유로(26)와 파워실린더(P/C)의 좌측공간(CL)과 밸브바디(20)의 파워실린더에로의 일측통로유로(21)를 연통시켜, 파워실린더의 좌측공간(CL)으로 오일이 유입되게 된다. As shown in FIG. 1, when the valve shaft 10 rotates in the direction of the arrow by a predetermined angle due to the rotation of the steering wheel, the supply flow path groove 11a is an oil supply flow path 26 among the flow path grooves of the valve shaft 10. And the one side passage passage 21 of the left cylinder CL of the power cylinder P / C and the power cylinder of the valve body 20 communicate with each other, so that oil flows into the left cylinder CL of the power cylinder. .

이와 동시에, 밸브샤프트(10)의 유로홈중에서 복귀공(13)이 형성된 복귀유로홈(11b)은 파워실린더의 우측공간 (CR)과 연통된 밸브바디(20)의 상기 파워실린더부터의 타측통로유로(22)와 연통되어, 파워실린더의 우측공간(CR)의 유체가 밸브샤프트의 중공부(12)로 유입되어 오일탱크로 복귀되어 계속 순환하게 된다.At the same time, the return flow path groove 11b in which the return hole 13 is formed in the flow path groove of the valve shaft 10 is the other passage from the power cylinder of the valve body 20 in communication with the right space CR of the power cylinder. In communication with the flow passage 22, the fluid in the right space CR of the power cylinder flows into the hollow portion 12 of the valve shaft and returns to the oil tank to continue circulation.

그러나, 상기한 바와 같은 종래 기술에 따른 로터리밸브 구조에서는 상기 과정에서 오일공급유로로(26)유체가 들어올 때 유체에 맥동이 발생하게되면 유체가 상기 파워실린더의 좌측공간 (CL)안에서 실린더를 밀때에도 맥동이 발생하게되어 스티어링휠 조타시 저주파수 진동이 느껴지는 문제점이 있다.  However, in the rotary valve structure according to the related art as described above, when the oil supply flow path 26 fluid enters the pulsation in the process, the fluid pushes the cylinder in the left space CL of the power cylinder. Even when pulsation occurs, there is a problem that low-frequency vibration is felt during steering wheel steering.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 오일탱크로 복귀하는 유체가 쉽게 빠져나갈 수 없도록 로터리밸브의 복귀유로 구조를 개선하여 조향보조력에 대한 작동유체의 저항력을 이용함으로써 ,파워 스티어링 시스템에서 발생하는 진동을 효과적으로 저감시키는데에 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, by improving the structure of the return flow path of the rotary valve so that the fluid returning to the oil tank can not easily escape by using the resistance of the working fluid to the steering assist force The purpose is to effectively reduce the vibration generated in the power steering system.

상기한 과제를 해결하기 위한 본 발명에 따른 로터리 밸브의 구조는 오일펌프로부터 오일을 공급받는 오일공급유로와 오일펌프로부터 공급된 오일을 파워실린더로 공급 또는 복귀시키는 통로유로가 형성된 밸브바디와;The rotary valve structure according to the present invention for solving the above problems is a valve body formed with an oil supply passage for receiving oil from the oil pump and a passage passage for supplying or returning the oil supplied from the oil pump to the power cylinder;

상기 밸브바디의 내측에 회전가능토록 결합되고 상기 밸브바디의 유로를 개폐시키는 유로홈이 마련된 밸브샤프트로 구성되는 동력장치의 로터리밸브에 있어서,In the rotary valve of the power unit consisting of a valve shaft coupled to the inside of the valve body rotatably and provided with a flow path groove for opening and closing the flow path of the valve body,

상기 밸브바디에는 상기 파워실린더에서 복귀되는 유체를 오일탱크로 안내하는 오일복귀유로가 형성되어 있고, 상기 밸브 샤프트의 유로홈은 상기 오일공급유로에서 공급되는 오일을 상기 통로유로로 안내하는 오일공급홈과, 상기 밸브바디의 오일복귀유로로 복귀하는 유체의 좁은 유로를 형성하는 오리피스형성홈으로 구성되어 있다. 또한, 상기 밸브바디의 오일복귀유로는 상기 오일복귀유로의 연장된 일단부와 연통이 되어 복귀되는 유체가 오일 탱크로 빠져나가도록 상기 밸브바디의 일측에는 내측과 외측이 관통되는 오일복귀공이 형성되어 있다. The valve body has an oil return flow path for guiding the fluid returned from the power cylinder to the oil tank, the flow path groove of the valve shaft is an oil supply groove for guiding oil supplied from the oil supply flow path to the passage flow path And an orifice forming groove forming a narrow flow path of the fluid returning to the oil return flow path of the valve body. In addition, the oil return flow path of the valve body is in communication with the extended one end of the oil return flow path is the oil return hole penetrating the inner side and the outer side is formed in one side of the valve body so that the fluid is returned to the oil tank have.

이하, 본 발명의 실시 예를 첨부된 도면을 참조하여 상세히 설명한다. 도 2 는 본 발명에 따른 로터리 밸브의 구조를 보인 단면도이고, 도 3은 상기 밸브샤프트가 도면과 같은 각도로 회전되었을 때 본 발명에 따른 로터리밸브의 구조와 오일의 흐름을 표시한 단면도이다. 또한, 도4는 본 발명에 따른 로터리밸브의 전체적인 구성을 보인 종단면도이다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 2 is a cross-sectional view showing the structure of a rotary valve according to the present invention, Figure 3 is a cross-sectional view showing the structure and flow of oil of the rotary valve according to the present invention when the valve shaft is rotated at the angle as shown in the figure. 4 is a longitudinal sectional view showing the overall configuration of a rotary valve according to the present invention.

본 발명에 따른 로터리 밸브는 이에 도시한 바와 같이 , 밸브바디의 내주면에는 다수의 통로유로가(41,42)이 형성되는데 상기 통로유로(41)와 인접통로유로(42) 사이의 랜드면에는 오일펌프(P)에서 공급되는 유체가 유입되는 오일공급유로(46)가 형성되며, 이 오일공급유로(46)들은 간격이 상호 120°를 이루도록 형성된다. In the rotary valve according to the present invention, as shown therein, a plurality of passage passages 41 and 42 are formed on the inner circumferential surface of the valve body, and oil is provided on the land surface between the passage passage 41 and the adjacent passage passage 42. An oil supply passage 46 through which the fluid supplied from the pump P flows is formed, and the oil supply passages 46 are formed such that the intervals form 120 ° to each other.

또한, 상기 밸브바디(40)의 내주면에는 상기 오일공급유로(46)사이에 상기 파워실린더에서 복귀되는 유체를 오일탱크(T)로 안내하는 오일복귀유로(43)가 마련되어 있으며, 상기 오일복귀유로(43)들은 축방향으로 길이가 길게 형성 되어있고, 원주방향으로는 간격이 상호 120°를 이루도록 형성된다. In addition, an oil return passage 43 is provided on the inner circumferential surface of the valve body 40 to guide the fluid returned from the power cylinder to the oil tank T between the oil supply passages 46 and the oil return passages. 43 are formed long in the axial direction, the interval is formed to form a 120 ° to each other in the circumferential direction.

상기 밸브샤프트의(30)의 외주면에는 축방향으로 길게 형성되는 다수의 유로홈(33)이 마련된다. 이 때 유로홈(33)은 유체의 공급을 안내하는 공급유로홈(33a)과 상기 파워실린더에서 복귀하는 유체가 상기 밸브바디의 오일복귀유로(43)를 통하여 쉽게 빠져나가지 못하도록 좁은 유로를 형성하여 유체의 복귀를 안내하는 오리피스형성홈(33b,33c)으로 구성된다. 상기 공급유로홈(33a)는 상기 오일공급유로(43)를 포함하는 양측통로유로사이(41,42)의 랜드면의 너비에 일치하게 상기 오리피스형성홈(33b,33c)사이에 상호 120°를 이루도록 3개의 공급유로홈이 배치되며, 상기 오리피스형성홈(33b, 33c)은 상기 밸브바디(40)의 통로유로(41,42)와 오일복귀유로(43) 사이에 위치할 수있도록 상기 밸브샤프트(30)의 공급유로홈(33a)사이에 등간격으로 2개씩 총 6개가 형성된다.The outer circumferential surface of the valve shaft 30 is provided with a plurality of flow path grooves 33 extending in the axial direction. At this time, the flow path groove 33 forms a narrow flow path such that the supply flow path groove 33a for guiding the supply of fluid and the fluid returning from the power cylinder cannot easily escape through the oil return flow path 43 of the valve body. Orifice forming grooves 33b and 33c for guiding the return of the fluid. The supply flow path groove 33a is formed to be 120 ° between the orifice forming grooves 33b and 33c so as to match the width of the land surface between the two path flow paths 41 and 42 including the oil supply path 43. Three supply flow path grooves are arranged to achieve the opening, and the orifice forming grooves 33b and 33c may be positioned between the passage flow paths 41 and 42 and the oil return flow path 43 of the valve body 40. A total of six are formed at equal intervals between the supply flow path grooves 33a of the 30.

그리고, 본 발명에 따른 밸브바디(40)의 일측 단부에는 상기 오일복귀유로(43)와 연통되어 복귀되는 유체가 흐를수 있도록 오일복귀공(47)이 형성된다. In addition, an oil return hole 47 is formed at one end of the valve body 40 according to the present invention so that the fluid flowing in communication with the oil return passage 43 flows.

상기와 같이 구성된 본 발명의 동작을 살펴보면 다음과 같다.Looking at the operation of the present invention configured as described above are as follows.

도 3은 상기 밸브샤프트가 도면과 같은 각도로 회전되었을 때 본 발명에 따른 로터리 밸브의 구조와 오일의 흐름을 표시한 단면도이다.3 is a cross-sectional view showing the structure and oil flow of the rotary valve according to the present invention when the valve shaft is rotated at an angle as shown in the figure.

차량의 스티어링 휠을 회전시키면 밸브바디(40)와 밸브샤프트(30)가 같이 회전하지만 스토퍼(미도시)에 의해 밸브바디(40)와 밸브샤프트(50)는 최대 좌우 5°정도의 상대 변위를 갖게 된다. 이에 파워실린더내의 좌우 공간의 오일양이 조절되어 스티어일 휠의 조향보조력을 얻을 수있다. 이런 상기 파워스티어링 장치에 있어서 본 발명에 따른 구체적인 동작을 살펴보면, 도면 3에 도시된 바와 같이 반시계방향의 조향핸들의 회전으로 밸브샤프트(30)가 소정의 각도만큼 상기 밸브 바디와 상대변위를 갖게되면 상기 밸브샤프트(30)의 유로홈 중에서 오일공급홈(33a)은 파워실린더의 좌측공간(CL)이 연통된 밸브바디(40)의 일측통로유로(41)와 연통되어 , 오일펌프에서 공급되는 유체가 파워실린더의 좌측공간(CL)으로 유입되게 한다. When the steering wheel of the vehicle is rotated, the valve body 40 and the valve shaft 30 rotate together, but the stopper (not shown) causes the valve body 40 and the valve shaft 50 to have a relative displacement of about 5 ° at the maximum. Will have Accordingly, the amount of oil in the left and right spaces in the power cylinder is adjusted to obtain steering assistance of the steering wheel. Looking at the specific operation according to the present invention in such a power steering device, as shown in Figure 3, the valve shaft 30 has a relative displacement with the valve body by a predetermined angle by the rotation of the anti-clockwise steering wheel. When the oil supply groove 33a of the flow path groove of the valve shaft 30 communicates with the one-side passage flow path 41 of the valve body 40 in which the left space CL of the power cylinder is communicated, the oil supply groove 33a is supplied from the oil pump. The fluid is introduced into the left space CL of the power cylinder.

이와 동시에, 상기 밸브샤프트(30)의 오리피스형성홈(33b)은 파워실린더의 우측공간(CR)과 연통된 밸브바디(40)의 타측통로유로(42)와 연통이 된다. 따라서 파워실린더의 우측공간(CR)의 유체는 밸브바디(40)의 타측통로유로(42)를 거쳐 상기 밸브샤프트(30)의 오리피스형성홈(33b)에 의해 형성된 좁은 유로를 통해 상기 오리피스형성홈에 도달하게 되고, 이때 조향보조력에 대한 1차 저항력이 발생하게 된다. 그리고, 상기 오리피스형성홈에 있던 오일은 상기 밸브 바디(40)의 내주면과 상기 밸브샤프트(30)의 외주면 사이의 간극을 지나 상기 밸브바디의 오일복귀유로(43)로 빠지게 된다. 이때 2차 저항력이 발생하게 된다.At the same time, the orifice forming groove 33b of the valve shaft 30 communicates with the other passage passage 42 of the valve body 40 in communication with the right space CR of the power cylinder. Therefore, the fluid in the right space CR of the power cylinder passes through the other passage passage 42 of the valve body 40 through the narrow passage formed by the orifice forming groove 33b of the valve shaft 30. In this case, a primary resistance to steering assistance occurs. In addition, the oil in the orifice forming groove passes through the gap between the inner circumferential surface of the valve body 40 and the outer circumferential surface of the valve shaft 30 into the oil return passage 43 of the valve body. At this time, secondary resistance is generated.

그리고 밸브샤프트(30)가 역방향으로 회전하게되면 밸브샤프트(30)의 유로홈 중에서 공급유로부(33a)는 오일공급유로(46)과 파워실린더의 우측공간(CR)이 연통된 밸브바디(40)의 반대쪽통로유로(42)이 연통되어 , 오일펌프에서 공급되는 유체가 파워실린더의 우측공간(CL)으로 유입되게 한다.When the valve shaft 30 rotates in the reverse direction, the supply passage part 33a of the flow path groove of the valve shaft 30 communicates with the valve body 40 in which the oil supply passage 46 communicates with the right space CR of the power cylinder. The passage passage 42 on the opposite side of the c) is in communication, so that the fluid supplied from the oil pump flows into the right space CL of the power cylinder.

이와 동시에, 상기 밸브샤프트(30)의 오리피스형성홈(33c)은 파워실린더의 좌측공간(CL)과 연통된 밸브바디(40)의 타측통로유로(41)와 연통이 된다. 따라서 파워실린더의 우측공간(CL)의 유체는 밸브바디(40)의 타측통로유로(41)를 통해 밸브샤프트(30)의 오리피스형성홈(33c)을 거쳐 밸브바디(40)의 복귀유로부(43)로 안내되어 저항력이 발생하게 되고, 오일복귀공(47)을 통해 오일탱크(T)쪽으로 복귀되게 된다.At the same time, the orifice forming groove 33c of the valve shaft 30 communicates with the other passage passage 41 of the valve body 40 in communication with the left space CL of the power cylinder. Therefore, the fluid in the right side space CL of the power cylinder passes through the orifice forming groove 33c of the valve shaft 30 through the other passage passage 41 of the valve body 40 and the return passage portion of the valve body 40 ( 43) to generate a resistance force, and is returned to the oil tank (T) through the oil return hole (47).

이러한 저항력으로 인해서 도면 5에서 보이늣이 종래의 밸브구조에서보다 본 발명의 밸브구조에서 현격히 진동이 감소함을 알수 있으며, ECU의 750rpm에서 가장 낮은 진동이 나타남을 실험을 통해서 알수 있다.Due to this resistance, it can be seen that the vibration shown in FIG. 5 is significantly reduced in the valve structure of the present invention than in the conventional valve structure, and the experiment shows that the lowest vibration is shown at 750 rpm of the ECU.

상기와 같이 구성되는 본 발명에 따른 동력장치의 로터리밸브의 구조는 파워실린더에서 복귀하는 유체를 밸브샤프트의 오리피스형성홈에 의해 형성된 좁은 유로를 거쳐 밸브바디의 오일복귀유로로 안내함으로써 종래의 로터리밸브의 구조와 달리 조향보조력에 대한 저항력을 발생시켜 스티어링 휠 조타시 오일펌프에서의 맥동으로 인한 진동발생을 효과적으로 감소시켜 쾌적한 승차감을 제공할수 있는 이점이 있다. The rotary valve structure of the power unit according to the present invention configured as described above is a conventional rotary valve by guiding the fluid returning from the power cylinder to the oil return flow path of the valve body through a narrow flow path formed by the orifice forming groove of the valve shaft Unlike the structure of the steering force is generated by the resistance to the steering wheel steering to effectively reduce the vibration caused by the pulsation in the oil pump has the advantage that can provide a comfortable ride.

Claims (5)

오일펌프로부터 오일을 공급받는 오일공급유로와, 오일펌프로부터 공급된 오일을 파워실린더로 공급 또는 복귀시키는 통로유로가 형성되어 있는 밸브바디와;A valve body having an oil supply passage for receiving oil from the oil pump, and a passage passage for supplying or returning oil supplied from the oil pump to the power cylinder; 상기 밸브바디의 내측에 회전가능토록 결합되고 상기 밸브바디의 유로를 개폐시키는 유로홈이 마련된 밸브샤프트로 이루어지는 동력장치의 로터리밸브에 있어서,In the rotary valve of the power unit consisting of a valve shaft coupled to the inside of the valve body rotatably and provided with a flow path groove for opening and closing the flow path of the valve body, 상기 밸브바디는 내주면에 상기 파워실린더에서 복귀되는 유체를 오일탱크로 안내하는 오일복귀유로가 형성되어 있고, The valve body has an oil return passage for guiding the fluid returned from the power cylinder to the oil tank on the inner circumferential surface, 상기 밸브샤프트는, 상기 오일공급유로부터의 오일을 상기 오일복귀유로로 안내하는 오일공급홈과;The valve shaft may include an oil supply groove for guiding oil from the oil supply oil to the oil return flow path; 오일복귀유로로 복귀하는 유체의 좁은 유로를 형성시키는 오리피스형성홈이 구비되는 것을 특징으로 하는 동력장치의 로터리밸브. A rotary valve for a power unit, characterized in that the orifice forming groove for forming a narrow flow path of the fluid returning to the oil return flow path. 청구항 1 에 있어서, The method according to claim 1, 상기 오리피스형성홈은 상기 밸브바디의 통로유로와 오일복귀유로사이에 위치할수 있도록 상기 밸브샤프트에 형성되는 동력장치의 로터리밸브구조.And the orifice forming groove is formed in the valve shaft so as to be located between the passage flow path and the oil return flow path of the valve body. 청구항 1에 있어서,The method according to claim 1, 상기 오일공급홈은 상기 오일공급유로를 포함하는 상기 양측통로홈사이의 랜드면의 너비와 일치하게 상기 오리피스형성홈사이에 형성되는 동력장치의 로터리밸브.The oil supply groove is a rotary valve of the power unit is formed between the orifice forming groove to match the width of the land surface between the two passage grooves including the oil supply passage. 청구항 1 에 있어서,The method according to claim 1, 3개의 상기 오일공급홈과, 6개의 상기 오리피스형성홈이 형성되는 것을 특징으로 하고 있는 동력조향장치의 로터리밸브.And three said oil supply grooves and six said orifice forming grooves. 청구항 1 있어서,The method according to claim 1, 상기 밸브바디는 상기 오일복귀유로의 연장된 일단부와 연통이 되어 복귀되는 유체가 오일탱크로 빠져 나가도록 상기 밸브바디의 일측에는 내측과 외측이 관통되는 오일복귀공이 형성된 것을 특징으로 하는 동력장치의 로터리밸브.The valve body is in communication with the extended end of the oil return flow path of the power unit, characterized in that the oil return hole is formed in one side of the valve body through the inside and the outside so that the fluid is returned to the oil tank. Rotary valve.
KR1020060018217A 2006-02-24 2006-02-24 Power steering rotary valve strcuture for damping KR100803849B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986460B1 (en) * 2008-05-20 2010-10-08 기아자동차주식회사 Rotary valve for power steering system
CN102261360A (en) * 2011-07-08 2011-11-30 华侨大学 Multi-waveform hydraulic rotary valve for hydraulic vibration exciter

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19980058871A (en) * 1996-12-30 1998-10-07 오상수 Pressure Control Valve for Automotive Power Steering System
US6035957A (en) 1997-09-22 2000-03-14 Trw Inc. Power steering control valve balancing
US6082403A (en) 1998-04-09 2000-07-04 Trw Inc. Power steering control valve with back pressure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100986460B1 (en) * 2008-05-20 2010-10-08 기아자동차주식회사 Rotary valve for power steering system
CN102261360A (en) * 2011-07-08 2011-11-30 华侨大学 Multi-waveform hydraulic rotary valve for hydraulic vibration exciter
CN102261360B (en) * 2011-07-08 2014-06-18 华侨大学 Multi-waveform hydraulic rotary valve for hydraulic vibration exciter

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