JPS646402U - - Google Patents
Info
- Publication number
- JPS646402U JPS646402U JP10098987U JP10098987U JPS646402U JP S646402 U JPS646402 U JP S646402U JP 10098987 U JP10098987 U JP 10098987U JP 10098987 U JP10098987 U JP 10098987U JP S646402 U JPS646402 U JP S646402U
- Authority
- JP
- Japan
- Prior art keywords
- pilot
- valve
- pilot oil
- hydraulic circuit
- valves
- 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
- 238000007599 discharging Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Description
第１図はこの考案の一実施例を示す油圧回路図
、第２図はこの考案の他の実施例を示す油圧回路
図、第３図は従来の油圧回路図である。
１，２……可変容量形油圧ポンプ、４，５……
パイロツト切換弁、６，７……アクチユエータ、
８……パイロツト油圧源（パイロツトポンプ）、
９，１０……パイロツトバルブ、１１ａ，１１ｂ
，１３ａ，１３ｂ……パイロツト油室、１２ａ，
１２ｂ，１４ａ，１４ｂ……パイロツト管路、１
６……リリーフ弁、１７……戻り管路、１８ａ，
１８ｂ，１９ａ，１９ｂ……チエツク弁、２０…
…作動油タンク、２１，２２……操作レバー、２
３……パイロツトチエツク弁、２５……シヤトル
弁。
FIG. 1 is a hydraulic circuit diagram showing one embodiment of this invention, FIG. 2 is a hydraulic circuit diagram showing another embodiment of this invention, and FIG. 3 is a conventional hydraulic circuit diagram. 1, 2...variable displacement hydraulic pump, 4, 5...
Pilot switching valve, 6, 7... actuator,
8... Pilot hydraulic power source (pilot pump),
9, 10...Pilot valve, 11a, 11b
, 13a, 13b...Pilot oil chamber, 12a,
12b, 14a, 14b...Pilot pipe line, 1
6... Relief valve, 17... Return pipe, 18a,
18b, 19a, 19b...check valve, 20...
...Hydraulic oil tank, 21, 22...Operation lever, 2
3...Pilot check valve, 25...Shuttle valve.
Claims (1)
ト管路を介してパイロツトバルブからのパイロツ
ト圧を給・排することによつて、ブーム或いはア
ーム等のアクチユエータを操作するパイロツト操
作式油圧回路において、パイロツト切換弁４，５
のパイロツト油室１１ａ，１１ｂ，１３ａ，１３
ｂを夫々パイロツトバルブ９，１０を介してパイ
ロツト油圧源８に接続すると共に、パイロツト油
圧源８からのパイロツト圧を制御するリリーフ弁
１６の戻り管路１７をリリーフ弁側からパイロツ
ト油室側への流通のみを許容するチエツク弁１８
ａ，１８ｂ，１９ａ，１９ｂを介して前記パイロ
ツト切換弁４，５のパイロツト油室１１ａ，１１
ｂ，１３ａ，１３ｂに夫々接続したことを特徴と
するパイロツト操作式油圧回路。 In a pilot-operated hydraulic circuit that operates an actuator such as a boom or an arm by supplying and discharging pilot pressure from a pilot valve to the pilot oil chamber of the pilot switching valve via a pilot pipe, the pilot switching valve 4 ,5
Pilot oil chambers 11a, 11b, 13a, 13
b are connected to the pilot oil pressure source 8 via pilot valves 9 and 10, respectively, and the return pipe 17 of the relief valve 16 that controls the pilot pressure from the pilot oil pressure source 8 is connected from the relief valve side to the pilot oil chamber side. Check valve 18 that only allows flow
a, 18b, 19a, 19b to the pilot oil chambers 11a, 11 of the pilot switching valves 4, 5.
A pilot-operated hydraulic circuit characterized in that the circuits are connected to terminals b, 13a, and 13b, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098987U JPS646402U (en) | 1987-07-02 | 1987-07-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10098987U JPS646402U (en) | 1987-07-02 | 1987-07-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS646402U true JPS646402U (en) | 1989-01-13 |
Family
ID=31329570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10098987U Pending JPS646402U (en) | 1987-07-02 | 1987-07-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS646402U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210102626A1 (en) * | 2015-12-07 | 2021-04-08 | Kubota Corporation | Hydraulic system of work machine and work machine |
-
1987
- 1987-07-02 JP JP10098987U patent/JPS646402U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210102626A1 (en) * | 2015-12-07 | 2021-04-08 | Kubota Corporation | Hydraulic system of work machine and work machine |
| US11644098B2 (en) * | 2015-12-07 | 2023-05-09 | Kubota Corporation | Hydraulic system of work machine and work machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH01133503U (en) | ||
| JPS60129503U (en) | swing hydraulic circuit | |
| JPS646402U (en) | ||
| JPH01165766U (en) | ||
| JPS5810960U (en) | Hydraulic excavator hydraulic circuit | |
| JPS6415805U (en) | ||
| JPH0169857U (en) | ||
| JPH0183906U (en) | ||
| JPS646401U (en) | ||
| JPS6428460U (en) | ||
| JPH0118693Y2 (en) | ||
| JPS6424703U (en) | ||
| JPS62147703U (en) | ||
| JPH02145307U (en) | ||
| JPH0266705U (en) | ||
| JPH0185502U (en) | ||
| JPS6018302U (en) | cushion valve | |
| JPH0187302U (en) | ||
| JPH02145306U (en) | ||
| JPS63132102U (en) | ||
| JPS62196260U (en) | ||
| JPS6429502U (en) | ||
| JPH0173506U (en) | ||
| JPS5951854U (en) | Hydraulic circuit of 2-pump hydraulic excavator | |
| JPS58185658U (en) | Hydraulic circuit of 2-pump hydraulic excavator |