JPH03123166U - - Google Patents
Info
- Publication number
- JPH03123166U JPH03123166U JP3095290U JP3095290U JPH03123166U JP H03123166 U JPH03123166 U JP H03123166U JP 3095290 U JP3095290 U JP 3095290U JP 3095290 U JP3095290 U JP 3095290U JP H03123166 U JPH03123166 U JP H03123166U
- Authority
- JP
- Japan
- Prior art keywords
- side port
- pressure receiving
- motor side
- motor
- receiving chamber
- 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 2
Landscapes
- Safety Valves (AREA)
Description
第１図は本考案の実施例を示す断面図、第２図
はその模式的説明図、第３図は各ポートの開口面
積とスプールストロークの関係を示す図表、第４
図は従来例の断面図、第５図はそのポート開口面
積とスプールストロークの関係を示す図表である
。
１……油圧ポンプ、２……操作弁、３……油圧
モータ、７１，７２……第１・第２スプール、８
……第１ポンプ側ポート、９……第１モータ側ポ
ート、１０……第２ポンプ側ポート、１１……第
２モータ側ポート、１８，１９……第１・第２受
圧室、２０，２５……第１・第２パイロツト通路
、２４，２９……第１・第２連通孔。
Figure 1 is a sectional view showing an embodiment of the present invention, Figure 2 is a schematic explanatory diagram thereof, Figure 3 is a chart showing the relationship between the opening area of each port and the spool stroke, and Figure 4 is a diagram showing the relationship between the opening area of each port and the spool stroke.
The figure is a sectional view of a conventional example, and FIG. 5 is a chart showing the relationship between the port opening area and the spool stroke. 1...Hydraulic pump, 2...Operation valve, 3...Hydraulic motor, 7 1 , 7 2 ...First and second spools, 8
...First pump side port, 9...First motor side port, 10...Second pump side port, 11...Second motor side port, 18, 19...First and second pressure receiving chambers, 20, 25...First and second pilot passages, 24, 29...First and second communication holes.
Claims (1)
エータに供給する回路に設けられてアクチユエー
タからの戻り油の流れを制限するカウンタバラン
ス弁において、 第１ポンプ側ポート８と第２モータ側ポート９
及び第２ポンプ側ポート１０と第２モータ側ポー
ト１１を連通・遮断するスプールを、バネ力で遮
断位置とし、かつ第１・第２受圧室１８，１９の
圧力差により連通位置に向けて移動するようにし
、その第１受圧室１８を第２モータ側ポート１１
に、第２受圧室１９を第１モータ側ポート９にそ
れぞれ連通し、前記第１モータ側ポート９と第２
モータ側ポート１１を連通し、かつ開口面積がス
プールストロークにより変化する連通孔を形成し
たことを特徴とするカウントバランス弁。[Claims for Utility Model Registration] In a counterbalance valve that is provided in a circuit that supplies pressure oil discharged from a hydraulic pump 1 to an actuator by an operating valve 2 and restricts the flow of return oil from the actuator, a first pump side port 8 and second motor side port 9
The spool that connects and disconnects the second pump-side port 10 and the second motor-side port 11 is set to the disconnection position by spring force, and moved toward the communication position by the pressure difference between the first and second pressure receiving chambers 18 and 19. The first pressure receiving chamber 18 is connected to the second motor side port 11.
The second pressure receiving chamber 19 is communicated with the first motor side port 9, and the first motor side port 9 and the second pressure receiving chamber 19 are connected to each other.
A count balance valve characterized by forming a communication hole which communicates with a motor side port 11 and whose opening area changes depending on the spool stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095290U JPH03123166U (en) | 1990-03-28 | 1990-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3095290U JPH03123166U (en) | 1990-03-28 | 1990-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03123166U true JPH03123166U (en) | 1991-12-16 |
Family
ID=31533675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3095290U Pending JPH03123166U (en) | 1990-03-28 | 1990-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03123166U (en) |
-
1990
- 1990-03-28 JP JP3095290U patent/JPH03123166U/ja active Pending
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