JPH0444570U - - Google Patents
Info
- Publication number
- JPH0444570U JPH0444570U JP8068290U JP8068290U JPH0444570U JP H0444570 U JPH0444570 U JP H0444570U JP 8068290 U JP8068290 U JP 8068290U JP 8068290 U JP8068290 U JP 8068290U JP H0444570 U JPH0444570 U JP H0444570U
- Authority
- JP
- Japan
- Prior art keywords
- spool
- pressure chamber
- power steering
- control valve
- pressure
- 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
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims 3
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 230000003134 recirculating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
Description
【図面の簡単な説明】
第１図乃至第３図は本考案に係る流量制御弁の
一実施例を示す断面図、第４図と第５図は夫々従
来の流量制御弁の例を示す断面図、第６図ａは第
２図の流量制御弁のメイン流路の作動油供給流量
特性を示す線図、第６図ｂは第５図の流量制御弁
の作動油吐出流量特性を示す線図、第６図ｃは本
考案に係る第１図乃至第３図の流量制御弁の作動
油吐出流量特性を示す線図である。
１５……スプール室、１６……吐出ポート、２
１……開口、２２……流入ポート、２３……ドレ
ンポート、２４……スプール、２４ｂ……流路管
部、２４ｃ，２４１ｃ，２４２ｃ……差圧受圧部
（サブピストン部、ランドリング状ランド）、２
６……メインオリフイス、２８……スプリング、
２９……サブオリフイス、Ｐ１……第１圧力室、
Ｐ２……第２圧力室、Ｐ３……補助圧力室。[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 3 are cross-sectional views showing one embodiment of the flow control valve according to the present invention, and FIGS. 4 and 5 are cross-sectional views showing examples of conventional flow control valves, respectively. Figure 6a is a line showing the hydraulic oil supply flow rate characteristics of the main flow path of the flow control valve in Figure 2, and Figure 6b is a line showing the hydraulic oil discharge flow rate characteristics of the flow control valve in Figure 5. FIG. 6C is a diagram showing the hydraulic oil discharge flow rate characteristics of the flow control valves shown in FIGS. 1 to 3 according to the present invention. 15...Spool chamber, 16...Discharge port, 2
1...Opening, 22...Inflow port, 23...Drain port, 24...Spool, 24b...Flow path pipe section, 24c, 241c, 242c...Differential pressure receiving part (sub-piston part, land ring-shaped land) ), 2
6...Main orifice, 28...Spring,
29... Sub-orifice, P1... First pressure chamber,
P2...second pressure chamber, P3...auxiliary pressure chamber.
Claims (1)
アリング装置の油圧回路へ作動油を吐出供給する
吐出ポートと、それら流入及び吐出ポートの間に
設けたメインオリフイスと、余剰の圧油を還流さ
せるドレンポートとを備え、前記流入ポートから
の流入量に応じてスプール室内のスプールが移動
して前記ドレンポートからのドレン流量を増減さ
せ、前記メインオリフイスを介して前記吐出ポー
トから供給される吐出流量制御を行うようにした
パワーステアリング装置用流量制御弁において、 前記流入ポートとメインオリフイスとの間に、
サブオリフイスを設け、このサブオリフイス前後
の圧力が作用する受圧部を、前記スプールに形成
したことにより、圧油流入量に応じて作動油吐出
流量が減少するようにしたことを特徴とするパワ
ーステアリング装置用流量制御弁。 (2) 前記スプール室内の前記スプールの前後に
第１圧力室と第２圧力室とを画成し、前記サブオ
リフイスの上流側に補助圧力室を設け、前記スプ
ールの前記受圧部を、一側が該補助圧力室に臨み
他側が前記第１圧力室に臨むピストンとして形成
したことを特徴とする請求項(1)記載のパワース
テアリング装置用流量制御弁。 (3) 前記スプールに、前記スプール室の前記第
１圧力室側の壁部に設けた開口を液密的に貫通し
て前記吐出ポート内へ延出する流路管部を設け、
該流路管部に前記メインオリフイスを形成するこ
とにより前記第１圧力室を前記吐出ポートに連通
させたことを特徴とする請求項(2)記載のパワー
ステアリング装置用流量制御弁。 (4) 前記スプール室内の前記スプールの前後に
第１圧力室と第２圧力室とを画成し、前記サブオ
リフイスの上流側に補助圧力室を設け、前記スプ
ールの前記受圧部を、一側が該補助圧力室に臨み
他側が前記第１圧力室に臨むランドとして前記ス
プールに設けたことを特徴とする請求項(1)記載
のパワーステアリング装置用流量制御弁。 (5) 前記スプールに設けたランドを摺動自在に
挿入したリング状ランドとし、該リング状ランド
とスプールとの間にスプリングを縮設したことを
特徴とする請求項(4)記載のパワーステアリング
装置用流量制御弁。[Scope of Claim for Utility Model Registration] (1) An inflow port into which pressure oil flows, a discharge port that discharges and supplies hydraulic fluid to the hydraulic circuit of a power steering device, and a main orifice provided between these inflow and discharge ports. , a drain port for recirculating excess pressure oil, and a spool in the spool chamber moves in accordance with the inflow amount from the inflow port to increase or decrease the drain flow rate from the drain port, and the drain port flows through the main orifice. In a flow control valve for a power steering device configured to control a discharge flow rate supplied from a discharge port, between the inflow port and the main orifice,
A power steering system characterized in that a sub-orifice is provided, and a pressure-receiving part on which the pressure before and after the sub-orifice acts is formed in the spool, so that the discharge flow rate of hydraulic oil is reduced according to the amount of pressure oil inflow. Flow control valve for equipment. (2) A first pressure chamber and a second pressure chamber are defined before and after the spool in the spool chamber, an auxiliary pressure chamber is provided upstream of the sub-orifice, and one side of the pressure receiving part of the spool is 2. The flow control valve for a power steering device according to claim 1, wherein the flow control valve for a power steering device is formed as a piston whose other side faces the auxiliary pressure chamber and whose other side faces the first pressure chamber. (3) the spool is provided with a flow pipe portion that liquid-tightly penetrates an opening provided in a wall portion of the spool chamber on the side of the first pressure chamber and extends into the discharge port;
3. The flow control valve for a power steering device according to claim 2, wherein the first pressure chamber is communicated with the discharge port by forming the main orifice in the flow pipe portion. (4) A first pressure chamber and a second pressure chamber are defined before and after the spool in the spool chamber, an auxiliary pressure chamber is provided upstream of the sub-orifice, and one side of the pressure receiving part of the spool is 2. The flow control valve for a power steering device according to claim 1, wherein the spool is provided with a land that faces the auxiliary pressure chamber and the other side faces the first pressure chamber. (5) The power steering according to claim (4), wherein the land provided on the spool is a ring-shaped land slidably inserted, and a spring is compressed between the ring-shaped land and the spool. Flow control valve for equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990080682U JP2556168Y2 (en) | 1990-05-30 | 1990-07-31 | Flow control valve for power steering device |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2-55954 | 1990-05-30 | ||
| JP5595490 | 1990-05-30 | ||
| JP1990080682U JP2556168Y2 (en) | 1990-05-30 | 1990-07-31 | Flow control valve for power steering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0444570U true JPH0444570U (en) | 1992-04-15 |
| JP2556168Y2 JP2556168Y2 (en) | 1997-12-03 |
Family
ID=31948578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990080682U Expired - Lifetime JP2556168Y2 (en) | 1990-05-30 | 1990-07-31 | Flow control valve for power steering device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556168Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0665157U (en) * | 1993-02-22 | 1994-09-13 | 自動車機器株式会社 | Flow control valve device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62220787A (en) * | 1986-03-19 | 1987-09-28 | Jidosha Kiki Co Ltd | Flow control valve |
-
1990
- 1990-07-31 JP JP1990080682U patent/JP2556168Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62220787A (en) * | 1986-03-19 | 1987-09-28 | Jidosha Kiki Co Ltd | Flow control valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0665157U (en) * | 1993-02-22 | 1994-09-13 | 自動車機器株式会社 | Flow control valve device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2556168Y2 (en) | 1997-12-03 |
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