JPH03108903U - - Google Patents
Info
- Publication number
- JPH03108903U JPH03108903U JP1732390U JP1732390U JPH03108903U JP H03108903 U JPH03108903 U JP H03108903U JP 1732390 U JP1732390 U JP 1732390U JP 1732390 U JP1732390 U JP 1732390U JP H03108903 U JPH03108903 U JP H03108903U
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- supply
- hydraulic pump
- pressure receiving
- 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
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の実施例を示す線図的構成説明
図、第２図はその操作弁の各ポートの開度とスト
ロークの関係を示す図表、第３図は操作弁・カウ
ターバランス弁の開度と油圧ポンプ吐出圧の関係
を示す図表、第４図は従来例の説明図である。
１……油圧ポンプ、２……操作弁、５……油圧
モータ、１４，１５……第１・第２受圧部、１６
，１７……第１・第２パイロツト路、１８，１９
……第１・第２電磁比例圧力制御弁、２０……コ
ントローラ、２１……圧力検出器。
Fig. 1 is a diagrammatic configuration explanatory diagram showing an embodiment of the present invention, Fig. 2 is a chart showing the relationship between the opening degree and stroke of each port of the operating valve, and Fig. 3 is a diagram of the operating valve/counter balance valve. A chart showing the relationship between the opening degree and the hydraulic pump discharge pressure, FIG. 4 is an explanatory diagram of a conventional example. DESCRIPTION OF SYMBOLS 1... Hydraulic pump, 2... Operation valve, 5... Hydraulic motor, 14, 15... First and second pressure receiver, 16
, 17... 1st and 2nd pilot route, 18, 19
...first and second electromagnetic proportional pressure control valves, 20...controller, 21...pressure detector.
Claims (1)
する操作弁２、第１・第２受圧部１４，１５の圧
力によつて第１・第２供給位置に切換る構造とし
、該第１・第２受圧部１４，１５に接続した第１
・第２パイロツト路１６，１７に、前記油圧ポン
プ１の吐出圧が設定値以下に低下した時に減圧作
動する弁をそれぞれ設けたことを特徴とする油圧
モータの圧油供給装置。 The pressure oil discharged from the hydraulic pump 1 is switched to the first and second supply positions by the pressure of the operation valve 2 and the first and second pressure receiving parts 14 and 15, which supply the hydraulic motor 5 to the first and second supply positions. The first pressure receiving section connected to the second pressure receiving section 14, 15
- A pressure oil supply device for a hydraulic motor, characterized in that the second pilot passages 16 and 17 are each provided with a valve that operates to reduce the pressure when the discharge pressure of the hydraulic pump 1 drops below a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1732390U JPH03108903U (en) | 1990-02-26 | 1990-02-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1732390U JPH03108903U (en) | 1990-02-26 | 1990-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03108903U true JPH03108903U (en) | 1991-11-08 |
Family
ID=31520537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1732390U Pending JPH03108903U (en) | 1990-02-26 | 1990-02-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03108903U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019078091A1 (en) * | 2017-10-18 | 2019-04-25 | 川崎重工業株式会社 | Hydraulic shovel drive system |
-
1990
- 1990-02-26 JP JP1732390U patent/JPH03108903U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019078091A1 (en) * | 2017-10-18 | 2019-04-25 | 川崎重工業株式会社 | Hydraulic shovel drive system |