JPS64703U - - Google Patents
Info
- Publication number
- JPS64703U JPS64703U JP9538687U JP9538687U JPS64703U JP S64703 U JPS64703 U JP S64703U JP 9538687 U JP9538687 U JP 9538687U JP 9538687 U JP9538687 U JP 9538687U JP S64703 U JPS64703 U JP S64703U
- Authority
- JP
- Japan
- Prior art keywords
- port
- throttle
- spool
- servo valve
- way servo
- 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
- 238000010586 diagram Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 1
Landscapes
- Servomotors (AREA)
Description
第１図は本考案の実施例の油圧回路図で弁位置
は中立位置にあり、第２図は第１図の弁がフオー
スモータの入力電流により制御スプールが右方向
に動かされた位置を示す油圧回路図である。
１…圧力コンペンセータ、２…制御スプール、
３…スプール、４…フイードバツクピン、５…フ
イードバツクスプリング、９…ロツド、１２…入
口ポート、１４…第２のポート、１５Ａ…第２の
油室、１５Ｂ…第１の油室、１７…出口ポート、
１８…絞り部、１９…三方向サーボ弁、２４…フ
オースモータ、２５…スプリング、２８…第１の
ポート、２９…第３のポート、３０…チエツクバ
ルブ。
Figure 1 is a hydraulic circuit diagram of an embodiment of the present invention in which the valve is in a neutral position, and Figure 2 shows the hydraulic pressure in which the valve in Figure 1 is in a position where the control spool is moved to the right by the input current of the force motor. It is a circuit diagram. 1...Pressure compensator, 2...Control spool,
3... Spool, 4... Feedback pin, 5... Feedback spring, 9... Rod, 12... Inlet port, 14... Second port, 15A... Second oil chamber, 15B... First oil chamber, 17...Exit port,
18... Throttle part, 19... Three-way servo valve, 24... Force motor, 25... Spring, 28... First port, 29... Third port, 30... Check valve.
Claims (1)
直線上に順次配置された三方向サーボ弁およびフ
オースモータと、からなり；前記絞り部は２個の
ランドと連結部とを有する制御スプール、両端の
第１と２の油室、入口ポートおよび出口ポート、
第１の油室と入口ポートとの連通油路、および第
２の油室内で制御スプールを押圧して入口ポート
を閉じる方向に付勢するスプリングとを有し；前
記圧力コンペンセータは前記絞り部の入口ポート
の前に置かれかつ入口ポートと出口ポートとにそ
れぞれ接続されて両ポート間の差圧を一定にする
ようにされており；前記三方向サーボ弁は３個の
ランドと連結部を有するスプール、前記絞り部の
入口ポートと絞りを介して連通する第１のポート
、前記絞り部の第２の油室と連通する第２のポー
ト、前記絞り部の出口ポートと絞りを介して連通
する第３のポート、およびスプールの１端に接す
るフイードバツクスプリングを有するゼロラツプ
三方向サーボ弁であり；前記フオースモータは前
記三方向サーボ弁のスプールをフイードバツクス
プリングの反対側からロツドを介して押すように
されており；前記絞り部の制御スプールと前記三
方向サーボ弁のフイードバツクスプリングとはフ
イードバツクピンで連結されて制御スプールの軸
方向移動がフイードバツクピンとフイードバツク
スプリングとを介して三方向サーボ弁のスプール
に帰還されるようにされた電気―油圧流量制御弁
において、前記絞り部の出口ポートと、前記三方
向サーボ弁の前記第３のポートと、を前記絞りを
介して連通する油路の、前記絞りと前記第３のポ
ートとの間に、前記絞りから前記第３のポートへ
向けての流れを逆止する、チエツク弁を介したこ
とを特徴とする電気―油圧流量制御弁。 It consists of a pressure compensator, a constriction, a three-way servo valve and a force motor arranged sequentially in line with the constriction; the constriction includes a control spool having two lands and a connection, a first and two oil chambers, an inlet port and an outlet port,
The pressure compensator has a communication oil passage between the first oil chamber and the inlet port, and a spring that presses the control spool in the second oil chamber in a direction to close the inlet port; The three-way servo valve is placed in front of the inlet port and is connected to the inlet port and the outlet port to keep the differential pressure between the two ports constant; the three-way servo valve has three lands and a connection part. a spool, a first port that communicates with an inlet port of the throttle section via the throttle, a second port that communicates with a second oil chamber of the throttle section, and a second port that communicates with the outlet port of the throttle section via the throttle. a zero-lap three-way servo valve having a third port and a feedback spring in contact with one end of the spool; the force motor pushing the spool of the three-way servo valve through a rod from the opposite side of the feedback spring; The control spool of the throttle section and the feedback spring of the three-way servo valve are connected by a feedback pin, and the axial movement of the control spool connects the feedback pin and the feedback spring. an electro-hydraulic flow control valve configured to return to a spool of a three-way servo valve through the throttle; A check valve is provided between the throttle and the third port of the oil passage communicating with the throttle, for reversing the flow from the throttle to the third port. Hydraulic flow control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538687U JPH0425522Y2 (en) | 1987-06-23 | 1987-06-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9538687U JPH0425522Y2 (en) | 1987-06-23 | 1987-06-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS64703U true JPS64703U (en) | 1989-01-05 |
| JPH0425522Y2 JPH0425522Y2 (en) | 1992-06-18 |
Family
ID=30959856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9538687U Expired JPH0425522Y2 (en) | 1987-06-23 | 1987-06-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0425522Y2 (en) |
-
1987
- 1987-06-23 JP JP9538687U patent/JPH0425522Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0425522Y2 (en) | 1992-06-18 |
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