JPS5816403U - Pump control device for crane slow speed operation - Google Patents
Pump control device for crane slow speed operationInfo
- Publication number
- JPS5816403U JPS5816403U JP10935581U JP10935581U JPS5816403U JP S5816403 U JPS5816403 U JP S5816403U JP 10935581 U JP10935581 U JP 10935581U JP 10935581 U JP10935581 U JP 10935581U JP S5816403 U JPS5816403 U JP S5816403U
- Authority
- JP
- Japan
- Prior art keywords
- pump control
- cylinder
- switching valve
- pump
- control
- 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
Landscapes
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は従来の制御方法における吐出圧力と吐出油量の
関係を示す。第２図は従来の可変容量ポンプ制御回路図
。第３図は本考案に係る微速操作用ポンプ制御回路図。
第４図は本考案に係る装置を用いた場合の吐出圧力と吐
出油量の関係を示す。
図において；−Ｐｌ・・・・・・可変容量膨油圧ポンプ
、Ｐ２・・・・・・操作用油圧ポンプ、Ｃ１・・・・・
・ポンプコントロール用切換バルブ操作用シリンダ、Ｃ
２・・・・・・ポンプコントロールシリンダ、Ｃ３・・
・・・・微速操作用シリンダ、Ｃ４・曲・ポンプコント
ロールシリンダ、−Ｖｌ・・・・・・ポンプコントロー
ル用切換バルブ、Ｖ２・・・・・・方向切換バルブ、Ｖ
３・・・・・・リリーフバルブ（ｐｉ用）、Ｖ４・・・
・・・リリーフバルブ（Ｐ２用）、■、・・・・・・電
磁切換バルブ、Ｓ□・・・・・・スプリング、ＳＷ□・
曲・微速操作用スイッチ。FIG. 1 shows the relationship between discharge pressure and discharge oil amount in a conventional control method. Figure 2 is a conventional variable displacement pump control circuit diagram. FIG. 3 is a pump control circuit diagram for slow speed operation according to the present invention. FIG. 4 shows the relationship between discharge pressure and discharge oil amount when using the device according to the present invention. In the figure: -Pl...Variable capacity expansion hydraulic pump, P2...Operating hydraulic pump, C1...
・Cylinder for operating switching valve for pump control, C
2...Pump control cylinder, C3...
... Cylinder for slow speed operation, C4, curve, pump control cylinder, -Vl ... Switching valve for pump control, V2 ... Direction switching valve, V
3... Relief valve (for pi), V4...
...Relief valve (for P2), ■, ...Solenoid switching valve, S□ ...Spring, SW□・
Switch for music/low speed operation.
Claims (1)
切換バルブＶ５を設け、同じ（エンジンで駆動される可
変容量型油圧ポンプＰ１の制御部に該油圧ポンプ吐出圧
によって作動するシリンダＣ１と、該シリンダによって
切換えられるポンプコントロール用切換バルブＶ１と、
前記切換バルブＶ５によってポンプコントロール用切換
バルブＶ１を切換えるためのシリンダＣ３を設け、ポン
プコントロール用切換バルブＶ□を切換配管７． ８．
９を介してポンプコントロールシリンダＣ４に至り、
制御シリンダロンドを動かし油圧ポンプＰ１の吐出量を
制御するようにしたクレーン微速操作用ポンプ制御装置
。A switching valve V5 is provided upstream of the hydraulic pump P2 for operation driven by the engine, and a cylinder C1 operated by the discharge pressure of the hydraulic pump is connected to the control section of the variable displacement hydraulic pump P1 driven by the engine. a pump control switching valve V1 that is switched by a cylinder;
A cylinder C3 is provided for switching the pump control switching valve V1 by the switching valve V5, and the pump control switching valve V□ is connected to the switching pipe 7. 8.
9 to the pump control cylinder C4;
A pump control device for crane slow operation that moves a control cylinder rond to control the discharge amount of a hydraulic pump P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10935581U JPS5816403U (en) | 1981-07-24 | 1981-07-24 | Pump control device for crane slow speed operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10935581U JPS5816403U (en) | 1981-07-24 | 1981-07-24 | Pump control device for crane slow speed operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5816403U true JPS5816403U (en) | 1983-02-01 |
Family
ID=29903737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10935581U Pending JPS5816403U (en) | 1981-07-24 | 1981-07-24 | Pump control device for crane slow speed operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5816403U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50100472A (en) * | 1974-01-04 | 1975-08-09 | ||
| JPS53129781A (en) * | 1977-04-19 | 1978-11-13 | Caterpillar Tractor Co | Hydraulic device capable of controlling pressure and flow selectively and simultaneously |
-
1981
- 1981-07-24 JP JP10935581U patent/JPS5816403U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50100472A (en) * | 1974-01-04 | 1975-08-09 | ||
| JPS53129781A (en) * | 1977-04-19 | 1978-11-13 | Caterpillar Tractor Co | Hydraulic device capable of controlling pressure and flow selectively and simultaneously |
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