JPH02141703U - - Google Patents
Info
- Publication number
- JPH02141703U JPH02141703U JP5087089U JP5087089U JPH02141703U JP H02141703 U JPH02141703 U JP H02141703U JP 5087089 U JP5087089 U JP 5087089U JP 5087089 U JP5087089 U JP 5087089U JP H02141703 U JPH02141703 U JP H02141703U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- circuit side
- relief valve
- pump
- return circuit
- 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
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案にかかる油圧系の１実施例をあ
らわす油圧回路図、第２図は油圧パワーパツケー
ジの縦断面図、第３図はそのＡ−Ａ断面図、第４
図はそのＢ−Ｂ断面図、および第５図は従来の油
圧系をあらわす油圧回路図である。
１…油圧パワーパツケージ、２…油圧シリンダ
（油圧アクチユエータ）、４…油圧ポンプ、５…
電動機、９，９′…回路、１０，１０′…パイロ
ツトチエツク弁、１１，１１′…パイロツトリリ
ーフ弁、１４…パイロツトシリンダ（アンロード
手段）。
Fig. 1 is a hydraulic circuit diagram showing one embodiment of the hydraulic system according to the present invention, Fig. 2 is a longitudinal sectional view of the hydraulic power package, Fig. 3 is its AA sectional view, and Fig. 4
The figure is a sectional view taken along line BB, and FIG. 5 is a hydraulic circuit diagram showing a conventional hydraulic system. 1...Hydraulic power package cage, 2...Hydraulic cylinder (hydraulic actuator), 4...Hydraulic pump, 5...
Electric motor, 9, 9'...Circuit, 10, 10'...Pilot check valve, 11, 11'...Pilot relief valve, 14...Pilot cylinder (unloading means).
Claims (1)
チユエータを駆動させるようにした油圧系におい
て、前記油圧ポンプと前記油圧アクチユエータと
を結ぶ二つの回路の両方にそれぞれチエツク弁と
リリーフ弁を設け、さらに前記油圧ポンプが一定
方向に出力時に戻り回路側のリリーフ弁を叶出回
路側の油圧によってパイロツト作動させて戻り回
路側の油圧を減圧するアンロード手段を設けたこ
とを特徴とする油圧系。 In a hydraulic system in which a hydraulic actuator is driven by a hydraulic pump capable of outputting in both forward and reverse directions, a check valve and a relief valve are provided in both circuits connecting the hydraulic pump and the hydraulic actuator, and the hydraulic A hydraulic system characterized by being provided with unloading means for reducing the hydraulic pressure on the return circuit side by pilot operating a relief valve on the return circuit side using hydraulic pressure on the output circuit side when the pump outputs in a certain direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5087089U JPH02141703U (en) | 1989-04-28 | 1989-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5087089U JPH02141703U (en) | 1989-04-28 | 1989-04-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02141703U true JPH02141703U (en) | 1990-11-29 |
Family
ID=31569793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5087089U Pending JPH02141703U (en) | 1989-04-28 | 1989-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02141703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261504A (en) * | 2009-05-07 | 2010-11-18 | Yanmar Co Ltd | Hydraulic device |
| JP2020026815A (en) * | 2018-08-09 | 2020-02-20 | 株式会社タカコ | Pump unit |
-
1989
- 1989-04-28 JP JP5087089U patent/JPH02141703U/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261504A (en) * | 2009-05-07 | 2010-11-18 | Yanmar Co Ltd | Hydraulic device |
| JP2020026815A (en) * | 2018-08-09 | 2020-02-20 | 株式会社タカコ | Pump unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02141703U (en) | ||
| JPH0393266U (en) | ||
| JPH0414575U (en) | ||
| JPS61191810U (en) | ||
| JPS6170604U (en) | ||
| JPH0480769U (en) | ||
| JPS61177202U (en) | ||
| JPS62134902U (en) | ||
| JPH0195410U (en) | ||
| JPS61204054U (en) | ||
| JPS63148524U (en) | ||
| JPH0216000U (en) | ||
| JPS6176760U (en) | ||
| JPH01127301U (en) | ||
| JPS6255653U (en) | ||
| JPS62125671U (en) | ||
| JPS6391752U (en) | ||
| JPS63196857U (en) | ||
| JPS62201134U (en) | ||
| JPS61169696U (en) | ||
| JPS61152092U (en) | ||
| JPH01111764U (en) | ||
| JPH0318260U (en) | ||
| JPS63185902U (en) | ||
| JPS6016672U (en) | Hydraulic pump inactivation device when mobile agricultural machinery moves straight ahead |