JPH0226974U - - Google Patents

Info

Publication number
JPH0226974U
JPH0226974U JP10628188U JP10628188U JPH0226974U JP H0226974 U JPH0226974 U JP H0226974U JP 10628188 U JP10628188 U JP 10628188U JP 10628188 U JP10628188 U JP 10628188U JP H0226974 U JPH0226974 U JP H0226974U
Authority
JP
Japan
Prior art keywords
casing
long grooves
valve body
pressure source
hydraulic control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10628188U
Other languages
Japanese (ja)
Other versions
JP2523985Y2 (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1988106281U priority Critical patent/JP2523985Y2/en
Priority to US07/335,080 priority patent/US4924910A/en
Priority to EP19890303555 priority patent/EP0337723B1/en
Priority to DE68903863A priority patent/DE68903863T4/en
Priority to DE8989303555T priority patent/DE68903863T2/en
Publication of JPH0226974U publication Critical patent/JPH0226974U/ja
Application granted granted Critical
Publication of JP2523985Y2 publication Critical patent/JP2523985Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Sliding Valves (AREA)
  • Details Of Valves (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は動力舵取装置の油圧回路図と共に示す
本考案に係る油圧制御弁の正面断面図、第２図は
切欠部の形成態様を示す第１図の一部拡大図、第
３図は本考案に係る油圧制御弁を用いてなる動力
舵取装置における操舵補助力の増加特性を示すグ
ラフ、第４図は本考案に係る油圧制御弁において
生じる圧油の流動音の測定結果を従来の油圧制御
弁のそれと比較したグラフ、第５図は動力舵取装
置における操舵補助力の望ましい増加特性を示す
グラフ、第６図は従来の油圧制御弁における切欠
部の形成態様を示す図、第７図は第６図の切欠部
における圧油の流動状態の説明図である。 １……ケーシング、２……弁体、５，６……長
溝、１３……還流孔、５０……切欠部、５０ａ…
…第１の部分、５０ｂ……第２の部分、６０……
切欠部、Ｐ……油圧ポンプ、Ｓ……油圧シリンダ
。 Fig. 1 is a front cross-sectional view of a hydraulic control valve according to the present invention shown together with a hydraulic circuit diagram of a power steering device, Fig. 2 is a partially enlarged view of Fig. 1 showing the manner in which the notch is formed, and Fig. 3 is a partially enlarged view of Fig. 1. FIG. 4 is a graph showing the increasing characteristics of the steering assist force in a power steering system using the hydraulic control valve according to the present invention. A graph comparing it with that of a hydraulic control valve, FIG. 5 is a graph showing a desirable increase characteristic of steering assist force in a power steering device, FIG. 6 is a diagram showing a form of a notch in a conventional hydraulic control valve, and FIG. The figure is an explanatory diagram of the flow state of pressure oil in the notch shown in FIG. 6. DESCRIPTION OF SYMBOLS 1... Casing, 2... Valve body, 5, 6... Long groove, 13... Return hole, 50... Notch, 50a...
...First part, 50b... Second part, 60...
Notch, P...Hydraulic pump, S...Hydraulic cylinder.

Claims (1)

【実用新案登録請求の範囲】 その内周面に等配された複数本の長溝、又はこ
れらの長溝間に挟まれた部分を、相異なる圧油の
送給先に交互に連通させてある筒形のケーシング
と、これに回動自在に内嵌され、その外周面に等
配された前記長溝と同数の長溝、又はこれらの長
溝間に挟まれた部分を、高圧源と低圧源とに交互
に連通させてある円筒形の弁体とを備え、該弁体
と前記ケーシングとの間の相対角変位により両者
の前記長溝間に生じる連通部の面積変化に応じて
、前記送給先への送給油圧を制御する油圧制御弁
において、 前記弁体の長溝又はこれらに挟まれた部分の内
の一部は、前記低圧源との連通を遮断させてあり
、 この遮断部両側の前記連通部を隔てて互いに対
向する前記弁体側又は前記ケーシング側の角部に
、前記相対角変位が所定の大きさに達するまでの
間、前記面積変化を実質的に生ぜしめない形状を
有する切欠部を具備することを特徴とする油圧制
御弁。[Claims for Utility Model Registration] A cylinder having a plurality of long grooves equally distributed on its inner circumferential surface, or portions sandwiched between these long grooves, which are alternately communicated with different pressure oil delivery destinations. A shaped casing, rotatably fitted inside the casing, and the same number of long grooves as the above-mentioned long grooves equally distributed on its outer circumferential surface, or a portion sandwiched between these long grooves, is used alternately as a high pressure source and a low pressure source. and a cylindrical valve body that communicates with the casing, and according to a change in the area of the communicating portion that occurs between the long grooves of both the valve body and the casing due to a relative angular displacement between the valve body and the casing. In a hydraulic control valve that controls hydraulic pressure to be supplied, a part of the long groove of the valve body or a portion sandwiched therebetween is cut off from communication with the low pressure source, and the communication portions on both sides of the cutoff portion are A notch portion having a shape that does not substantially cause the area change until the relative angular displacement reaches a predetermined magnitude is provided at a corner portion of the valve body side or the casing side that face each other across the gap. A hydraulic control valve characterized by:
JP1988106281U 1988-04-12 1988-08-10 Hydraulic control valve Expired - Lifetime JP2523985Y2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1988106281U JP2523985Y2 (en) 1988-08-10 1988-08-10 Hydraulic control valve
US07/335,080 US4924910A (en) 1988-04-12 1989-04-07 Hydraulic pressure control valve
EP19890303555 EP0337723B1 (en) 1988-04-12 1989-04-11 Hydraulic pressure control valve
DE68903863A DE68903863T4 (en) 1988-04-12 1989-04-11 Hydraulic pressure control valve.
DE8989303555T DE68903863T2 (en) 1988-04-12 1989-04-11 HYDRAULIC PRESSURE CONTROL VALVE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988106281U JP2523985Y2 (en) 1988-08-10 1988-08-10 Hydraulic control valve

Publications (2)

Publication Number Publication Date
JPH0226974U true JPH0226974U (en) 1990-02-21
JP2523985Y2 JP2523985Y2 (en) 1997-01-29

Family

ID=31339645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988106281U Expired - Lifetime JP2523985Y2 (en) 1988-04-12 1988-08-10 Hydraulic control valve

Country Status (1)

Country Link
JP (1) JP2523985Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06206555A (en) * 1992-09-21 1994-07-26 Trw Inc Valve for controlling flow amount of pressurized fluid

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621973A (en) * 1979-07-31 1981-02-28 Nissan Motor Co Ltd Working valve device for power steering
JPS5712364U (en) * 1980-06-25 1982-01-22

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5621973A (en) * 1979-07-31 1981-02-28 Nissan Motor Co Ltd Working valve device for power steering
JPS5712364U (en) * 1980-06-25 1982-01-22

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06206555A (en) * 1992-09-21 1994-07-26 Trw Inc Valve for controlling flow amount of pressurized fluid

Also Published As

Publication number Publication date
JP2523985Y2 (en) 1997-01-29

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