JPH0439966U - - Google Patents
Info
- Publication number
- JPH0439966U JPH0439966U JP8301890U JP8301890U JPH0439966U JP H0439966 U JPH0439966 U JP H0439966U JP 8301890 U JP8301890 U JP 8301890U JP 8301890 U JP8301890 U JP 8301890U JP H0439966 U JPH0439966 U JP H0439966U
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- relative displacement
- area
- predetermined value
- constricted
- 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
Links
- 238000006073 displacement reaction Methods 0.000 claims 4
- 230000007423 decrease Effects 0.000 claims 1
- 230000001747 exhibiting effect Effects 0.000 claims 1
Description
第１図は本考案に係る油圧制御弁の模式的横断
面図、第２図は第１の絞りの構成態様を示す拡大
断面図、第３図は第２の絞りの構成態様を示す拡
大断面図、第４図は第３の絞りの構成態様を示す
拡大断面図、第５図は第１、第２、第３の絞りか
らなる絞り部における絞り面積の変化態様を示す
グラフ、第６図は本考案に係る油圧制御弁を用い
た動力舵取装置において得られる操舵補助力の増
加特性を示すグラフ、第７図は従来の油圧制御弁
の模式的横断面図、第８図は従来に油圧制御弁を
用いた動力舵取装置において得られる操舵補助力
の増加特性を示すグラフである。
１……油圧制御弁、２ａ，３ａ……第１の絞り
、２ｅ，３ｅ……第２の絞り、２ｂ〜２ｄ，２ｆ
〜２ｈ，３ｂ〜３ｄ，３ｆ〜３ｈ……第３の絞り
、１０……ケーシング、１１……油溝、１２……
弁体、１３……油溝、Ｐ……油圧ポンプ、Ｓ……
油圧シリンダ、Ｔ……油タンク。
Fig. 1 is a schematic cross-sectional view of a hydraulic control valve according to the present invention, Fig. 2 is an enlarged sectional view showing the configuration of the first throttle, and Fig. 3 is an enlarged sectional view showing the configuration of the second throttle. 4 is an enlarged sectional view showing the configuration of the third aperture, FIG. 5 is a graph showing the change in the aperture area in the aperture section consisting of the first, second, and third apertures, and FIG. 7 is a graph showing the increasing characteristics of the steering assist force obtained in the power steering system using the hydraulic control valve according to the present invention, FIG. 7 is a schematic cross-sectional view of the conventional hydraulic control valve, and FIG. 8 is the conventional hydraulic control valve. 2 is a graph showing an increase characteristic of steering assist force obtained in a power steering device using a hydraulic control valve. 1... Hydraulic control valve, 2a, 3a... First throttle, 2e, 3e... Second throttle, 2b to 2d, 2f
~2h, 3b~3d, 3f~3h...Third throttle, 10...Casing, 11...Oil groove, 12...
Valve body, 13... Oil groove, P... Hydraulic pump, S...
Hydraulic cylinder, T...Oil tank.
Claims (1)
つて一方の絞り面積が減じるとき他方の絞り面積
が増す一対の絞り部を備え、これらを高圧源及び
低圧源と適宜の送給先との間に夫々介在させて用
いられ、前記送給先への送給油圧を前記相対変位
に応じて制御する油圧制御弁において、 前記一対の絞り部は夫々、 前記相対変位が第１の所定値に達するまでの間
に、その絞り面積が実質的に変化しない領域を有
する第１の絞りと、 前記相対変位が前記第１の所定値を超える第２
の所定値に達するまでの間に、その絞り面積が実
質的に変化しない領域を有する第２の絞りと、 前記相対変位の略全域に亘り略一定の絞り面積
変化を示す第３の絞りと を具備することを特徴とする油圧制御弁。[Scope of Claim for Utility Model Registration] A pair of constricted portions in which the constricted area of one decreases and the other constricted area increases as a result of relative displacement occurring between the casing and the valve body, and these are used as a high pressure source and a low pressure source. In a hydraulic control valve that is used by being interposed between each of them and an appropriate delivery destination, and controls the hydraulic pressure supplied to the delivery destination according to the relative displacement, each of the pair of throttle portions has the following features: a first aperture having a region in which the aperture area does not substantially change until the aperture reaches a first predetermined value; and a second aperture in which the relative displacement exceeds the first predetermined value.
a second aperture having a region in which the aperture area does not substantially change until reaching a predetermined value; and a third aperture exhibiting a substantially constant change in aperture area over substantially the entire range of the relative displacement. A hydraulic control valve comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990083018U JP2520788Y2 (en) | 1990-08-03 | 1990-08-03 | Hydraulic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990083018U JP2520788Y2 (en) | 1990-08-03 | 1990-08-03 | Hydraulic control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0439966U true JPH0439966U (en) | 1992-04-06 |
| JP2520788Y2 JP2520788Y2 (en) | 1996-12-18 |
Family
ID=31630337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990083018U Expired - Lifetime JP2520788Y2 (en) | 1990-08-03 | 1990-08-03 | Hydraulic control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2520788Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142756A (en) * | 1980-04-01 | 1981-11-07 | Toyoda Mach Works Ltd | Servo valve |
-
1990
- 1990-08-03 JP JP1990083018U patent/JP2520788Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56142756A (en) * | 1980-04-01 | 1981-11-07 | Toyoda Mach Works Ltd | Servo valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2520788Y2 (en) | 1996-12-18 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |