JPH0234802U - - Google Patents
Info
- Publication number
- JPH0234802U JPH0234802U JP11449788U JP11449788U JPH0234802U JP H0234802 U JPH0234802 U JP H0234802U JP 11449788 U JP11449788 U JP 11449788U JP 11449788 U JP11449788 U JP 11449788U JP H0234802 U JPH0234802 U JP H0234802U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- valve
- passage
- directional
- chambers
- 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
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
第1図〜第3図は本考案の実施例の回路図であ
り、第1図は圧力補償弁を1つのパイロツト室と
2つのばね室で構成した実施例、第2図は圧力補
償弁を2つのパイロツト室と1つのばね室とで構
成した実施例、第3図は圧力補償弁を1つのパイ
ロツト室と3つのばね室とで構成した実施例をそ
れぞれ示す。第4図は本考案の方向切換弁の流量
―ストローク線図、第5図は従来技術の方向切換
弁の流量―ストローク線図、第6図は従来技術の
回路図である。
1…油圧ポンプ、2…アクチユエータ、3…方
向切換弁、3f…絞り、4…タンク、7…バイパ
ス通路、10…圧力補償弁、16,16a,16
b,16c…ばね室、18,18a,18b…パ
イロツト室、8,8a,8b,9,9a,9b,
9c…パイロツト通路、20,21,22,23
…切換弁。
Figures 1 to 3 are circuit diagrams of embodiments of the present invention. Figure 1 shows an example in which the pressure compensation valve is composed of one pilot chamber and two spring chambers, and Figure 2 shows an example in which the pressure compensation valve is configured with one pilot chamber and two spring chambers. FIG. 3 shows an embodiment in which the pressure compensation valve is constructed with two pilot chambers and one spring chamber, and FIG. 3 shows an embodiment in which the pressure compensation valve is constructed with one pilot chamber and three spring chambers. FIG. 4 is a flow rate-stroke diagram of the directional control valve of the present invention, FIG. 5 is a flow rate-stroke diagram of the directional control valve of the prior art, and FIG. 6 is a circuit diagram of the prior art. DESCRIPTION OF SYMBOLS 1... Hydraulic pump, 2... Actuator, 3... Directional switching valve, 3f... Throttle, 4... Tank, 7... Bypass passage, 10... Pressure compensation valve, 16, 16a, 16
b, 16c... Spring chamber, 18, 18a, 18b... Pilot chamber, 8, 8a, 8b, 9, 9a, 9b,
9c...Pilot passage, 20, 21, 22, 23
...Switching valve.
Claims (1)
に介設され、操作レバーの操作量に応じた絞りを
形成する方向切換弁と、この方向切換弁の上流側
から分岐するタンクへのバイパス通路に介設され
、方向切換弁の上流側にパイロツト通路を介して
連通するパイロツト室と、下流側にパイロツト通
路を介して連通するばね室とを有する圧力補償弁
とを備えた油圧回路において、 上記圧力補償弁のパイロツト室、またはばね室
を複数の室で構成し、この複数の室にそれぞれ接
続する上記パイロツト通路に、連通位置と、上記
タンクに開放する切換位置とを有する切換弁を配
置したことを特徴とする油圧回路。[Scope of Claim for Utility Model Registration] A directional switching valve that is interposed in the pump passage from the hydraulic pump to the actuator and forms a throttle depending on the amount of operation of the operating lever, and a tank that branches from the upstream side of this directional switching valve. A hydraulic circuit comprising a pressure compensating valve which is interposed in the bypass passage of the directional control valve and has a pilot chamber communicating with the upstream side of the directional control valve via a pilot passage, and a spring chamber communicating with the downstream side via the pilot passage. The pilot chamber or spring chamber of the pressure compensating valve is composed of a plurality of chambers, and the pilot passage connected to each of the plurality of chambers is provided with a switching valve having a communicating position and a switching position open to the tank. A hydraulic circuit characterized by the arrangement of.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11449788U JPH0234802U (en) | 1988-08-30 | 1988-08-30 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11449788U JPH0234802U (en) | 1988-08-30 | 1988-08-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0234802U true JPH0234802U (en) | 1990-03-06 |
Family
ID=31355302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11449788U Pending JPH0234802U (en) | 1988-08-30 | 1988-08-30 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0234802U (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58203202A (en) * | 1982-05-22 | 1983-11-26 | Daikin Ind Ltd | Hydraulic circuit |
JPS61206794A (en) * | 1985-03-08 | 1986-09-13 | 川崎重工業株式会社 | Hydraulic device with automatic stop device |
-
1988
- 1988-08-30 JP JP11449788U patent/JPH0234802U/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58203202A (en) * | 1982-05-22 | 1983-11-26 | Daikin Ind Ltd | Hydraulic circuit |
JPS61206794A (en) * | 1985-03-08 | 1986-09-13 | 川崎重工業株式会社 | Hydraulic device with automatic stop device |
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