JPS61172203U - - Google Patents
Info
- Publication number
- JPS61172203U JPS61172203U JP5605885U JP5605885U JPS61172203U JP S61172203 U JPS61172203 U JP S61172203U JP 5605885 U JP5605885 U JP 5605885U JP 5605885 U JP5605885 U JP 5605885U JP S61172203 U JPS61172203 U JP S61172203U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- valve
- passage
- communicates
- pilot valve
- 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
- 230000007935 neutral effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Operation Control Of Excavators (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案のパイロツト操作油圧回路の第
１の実施例を示す回路図、第２図は本考案の第２
の実施例を示す回路図、第３図は従来のパイロツ
ト操作油圧回路の一例を示す回路図、第４図は従
来の別の例を示す回路図である。
１……パイロツトポンプ、２……パイロツト弁
、５……タンク、８，９……パイロツト流路、１
１……第１の通路、１２……第２の通路、１３…
…戻し側流路、１６……流路、１７，１８……チ
エツク弁、１９……流路、２０……ブーストポン
プ、２１，２３……絞り、２２……第３の通路、
２４……リリーフ弁。
Fig. 1 is a circuit diagram showing a first embodiment of the pilot operating hydraulic circuit of the present invention, and Fig. 2 is a circuit diagram showing a second embodiment of the pilot operating hydraulic circuit of the present invention.
FIG. 3 is a circuit diagram showing an example of a conventional pilot operating hydraulic circuit, and FIG. 4 is a circuit diagram showing another example of the conventional pilot operating hydraulic circuit. 1... Pilot pump, 2... Pilot valve, 5... Tank, 8, 9... Pilot flow path, 1
1...first passage, 12...second passage, 13...
...Return side channel, 16... Channel, 17, 18... Check valve, 19... Channel, 20... Boost pump, 21, 23... Throttle, 22... Third passage,
24...Relief valve.
Claims (1)
、パイロツト信号圧力を発生させるパイロツト弁
と、上記主切換弁とパイロツト弁とを連絡する２
つのパイロツト流路と、上記パイロツト弁にパイ
ロツト供給圧を供給するパイロツトポンプと、上
記パイロツト弁のタンクポートとタンクとを連絡
する戻し側流路とを備えるとともに、上記パイロ
ツト弁がその中立位置に上記２つのパイロツト流
路を連絡する第１の通路と、この第１の通路と上
記タンクポートとを連絡する第２の通路とを有し
、パイロツト弁の中立時に上記パイロツト流路の
それぞれに所定の背圧を与えるようにしたパイロ
ツト操作油圧回路において、上記第２の通路に絞
りを設けたことを特徴とするパイロツト操作油圧
回路。 A main switching valve that is switched by pilot signal pressure, a pilot valve that generates pilot signal pressure, and 2 that connects the main switching valve and the pilot valve.
a pilot pump that supplies pilot supply pressure to the pilot valve, and a return side flow path that communicates the tank port of the pilot valve with the tank, and the pilot valve is in its neutral position. It has a first passage that communicates two pilot flow passages, and a second passage that communicates this first passage with the tank port, and when the pilot valve is in the neutral state, a predetermined flow is applied to each of the pilot flow passages. A pilot operating hydraulic circuit configured to apply back pressure, characterized in that a throttle is provided in the second passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5605885U JPS61172203U (en) | 1985-04-17 | 1985-04-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5605885U JPS61172203U (en) | 1985-04-17 | 1985-04-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61172203U true JPS61172203U (en) | 1986-10-25 |
Family
ID=30579307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5605885U Pending JPS61172203U (en) | 1985-04-17 | 1985-04-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61172203U (en) |
-
1985
- 1985-04-17 JP JP5605885U patent/JPS61172203U/ja active Pending