JPH027386U - - Google Patents
Info
- Publication number
- JPH027386U JPH027386U JP8477588U JP8477588U JPH027386U JP H027386 U JPH027386 U JP H027386U JP 8477588 U JP8477588 U JP 8477588U JP 8477588 U JP8477588 U JP 8477588U JP H027386 U JPH027386 U JP H027386U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- spring
- spool
- pressure chambers
- 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.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 3
Description
第１図は本考案実施例のパイロツト機構の断面
図、第２図は第１図のパイロツト機構を採用した
ポンプシステムの略図、第３図は吐出量制御特性
を示すグラフ、第４図は吐出量制御特性の別の例
を示すグラフ、第５図は別の実施例による切換弁
の略図である。
１……油圧ポンプ、３……サーボシリンダ、８
……制御弁、１３……フイードバツクレバー、２
０……パイロツト機構、２１……パイロツトスプ
ール、３２……パイロツトスプリング、５２……
第１パイロツト圧室、６５……第２パイロツト圧
室、６７……切換弁（油圧制御機構）。
Fig. 1 is a sectional view of the pilot mechanism of the embodiment of the present invention, Fig. 2 is a schematic diagram of a pump system employing the pilot mechanism of Fig. 1, Fig. 3 is a graph showing the discharge amount control characteristics, and Fig. 4 is a diagram of the discharge amount. FIG. 5, a graph showing another example of quantity control characteristics, is a schematic diagram of a switching valve according to another embodiment. 1... Hydraulic pump, 3... Servo cylinder, 8
...Control valve, 13...Feedback lever, 2
0... Pilot mechanism, 21... Pilot spool, 32... Pilot spring, 52...
1st pilot pressure chamber, 65...2nd pilot pressure chamber, 67... switching valve (hydraulic control mechanism).
Claims (1)
制御弁を設け、制御弁にパイロツト機構のパイロ
ツトスプールを連結し、サーボシリンダの吐出量
制御状態がパイロツトスプールの位置に対応する
ように上記制御弁とサーボシリンダとをフイード
バツクレバーにより連結し、上記パイロツト機構
に、パイロツトスプールを一方向に付勢するパイ
ロツトスプリングと、パイロツトスプールを上記
一方向とは逆の方向に付勢するための第１及び第
２のパイロツト圧室とを設け、上記両パイロツト
圧室に対するパイロツト油圧の供給及び停止と供
給状態の切り換えを行える油圧制御機構を両パイ
ロツト圧室に接続したことを特徴とする可変容量
型油圧ポンプの流量制御装置。 A control valve is provided to control the hydraulic pressure of a servo cylinder for controlling the discharge amount, and a pilot spool of a pilot mechanism is connected to the control valve. The pilot spring is connected to the cylinder by a feedback lever, and the pilot mechanism includes a pilot spring that biases the pilot spool in one direction, and a first and a first spring that biases the pilot spool in the opposite direction to the one direction. 2 pilot pressure chambers, and a hydraulic control mechanism capable of supplying and stopping pilot hydraulic pressure to both pilot pressure chambers and switching the supply state is connected to both pilot pressure chambers. Flow control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8477588U JPH027386U (en) | 1988-06-27 | 1988-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8477588U JPH027386U (en) | 1988-06-27 | 1988-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH027386U true JPH027386U (en) | 1990-01-18 |
Family
ID=31309455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8477588U Pending JPH027386U (en) | 1988-06-27 | 1988-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027386U (en) |
-
1988
- 1988-06-27 JP JP8477588U patent/JPH027386U/ja active Pending