JPS6120902U - Pump control circuit for cranes, etc. - Google Patents
Pump control circuit for cranes, etc.Info
- Publication number
- JPS6120902U JPS6120902U JP10446684U JP10446684U JPS6120902U JP S6120902 U JPS6120902 U JP S6120902U JP 10446684 U JP10446684 U JP 10446684U JP 10446684 U JP10446684 U JP 10446684U JP S6120902 U JPS6120902 U JP S6120902U
- Authority
- JP
- Japan
- Prior art keywords
- pump
- pilot
- pressure
- control
- control 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
Landscapes
- Control And Safety Of 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図は本考案の速度制御回路図。
第２図は公知の速度制御回路図。
図において、１・・・油圧ポンプ、２・・・方向切換弁
、３・・・リリーフ弁、４・・・油圧モータ、５，６・
・・（モータの）駆動回路、７・・・カウンターバラン
ス弁、８・・・戻り回路、９・・・操作用油圧ポンプ、
１０・・・パイロット弁、１１，１２・・・（パイロッ
ト弁の）２次側回路、１３・・・シャットル弁、１４・
・・（シャットル弁の）出口側の管路、１５・・・リリ
ーフ弁、１６・・・可変容量形油圧ポンプ、１７・・・
パイロット圧力源、１８・・・サーボピストン、１９・
・・レギュレータ、１９ａ・・・；ノンク機構、２０・
・・パイロット受圧部、２゜１・・・パイロット圧受圧
部、２２・・・切換弁二FIG. 1 is a speed control circuit diagram of the present invention. FIG. 2 is a known speed control circuit diagram. In the figure, 1... Hydraulic pump, 2... Directional switching valve, 3... Relief valve, 4... Hydraulic motor, 5, 6...
...(motor) drive circuit, 7...counter balance valve, 8...return circuit, 9...hydraulic pump for operation,
10...Pilot valve, 11, 12...(Pilot valve) secondary side circuit, 13...Shuttle valve, 14...
...Pipe line on the outlet side (of the shuttle valve), 15...Relief valve, 16...Variable displacement hydraulic pump, 17...
Pilot pressure source, 18... Servo piston, 19.
...Regulator, 19a...; Non-knock mechanism, 20.
...Pilot pressure receiving part, 2゜1...Pilot pressure receiving part, 22...Switching valve 2
Claims (1)
量形油圧ポンプを制御するように構成したクレーン等の
ポンプ制御回路において、馬力制御用レギュレータ及び
サーボピストンにより可変容量形油圧ポンプの吐出し量
を制御する馬力制御用レギュレータにポンプ吐出圧を直
接受けるパイロット受圧部と切換弁を介しパイロット油
圧源に通ずるパイロット受圧部とを設け、かつ該受圧部
を前記切換弁によりパイロット油圧源と低圧ラインとに
選択的に連通できるように構成すると共に、可変容量形
油圧ポンプの最小吐出量をアクチュエータを微速で動か
すのに必要十分な量にセットしておき、前記パイロット
受圧部をパイロット圧力源に連通させるポンプが最小吐
出量に固定されるようにしたことを特徴とするクレーン
等のポンプ制御回路。In a pump control circuit for a crane, etc. configured to control a variable displacement hydraulic pump using pilot pressure from a pilot hydraulic source, horsepower control is used to control the discharge amount of a variable displacement hydraulic pump using a horsepower control regulator and a servo piston. The regulator is provided with a pilot pressure receiving part that directly receives the pump discharge pressure and a pilot pressure receiving part that communicates with the pilot hydraulic pressure source via a switching valve, and the pressure receiving part is selectively communicated with the pilot hydraulic pressure source and the low pressure line by the switching valve. In addition, the minimum discharge amount of the variable displacement hydraulic pump is set to an amount necessary and sufficient to move the actuator at a slow speed, and the pump that connects the pilot pressure receiver to the pilot pressure source has a minimum discharge amount. A pump control circuit for a crane, etc., characterized in that the circuit is fixed to a pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10446684U JPS6120902U (en) | 1984-07-12 | 1984-07-12 | Pump control circuit for cranes, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10446684U JPS6120902U (en) | 1984-07-12 | 1984-07-12 | Pump control circuit for cranes, etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6120902U true JPS6120902U (en) | 1986-02-06 |
Family
ID=30663815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10446684U Pending JPS6120902U (en) | 1984-07-12 | 1984-07-12 | Pump control circuit for cranes, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6120902U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0276904A (en) * | 1988-06-29 | 1990-03-16 | Hitachi Constr Mach Co Ltd | Hydraulic drive device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628302A (en) * | 1979-08-17 | 1981-03-19 | Hitachi Constr Mach Co Ltd | Speed control circuit of crane or the like |
| JPS5633385A (en) * | 1979-08-27 | 1981-04-03 | Hitachi Construction Machinery | Control circuit for speed of crane* etc* |
| JPS5727987A (en) * | 1980-07-17 | 1982-02-15 | Mitsuo Koji | Method of curing inorganic concrete |
| JPS5813201A (en) * | 1981-07-15 | 1983-01-25 | Uchida Yuatsu Kiki Kogyo Kk | Hydarulic apparatus for press |
-
1984
- 1984-07-12 JP JP10446684U patent/JPS6120902U/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5628302A (en) * | 1979-08-17 | 1981-03-19 | Hitachi Constr Mach Co Ltd | Speed control circuit of crane or the like |
| JPS5633385A (en) * | 1979-08-27 | 1981-04-03 | Hitachi Construction Machinery | Control circuit for speed of crane* etc* |
| JPS5727987A (en) * | 1980-07-17 | 1982-02-15 | Mitsuo Koji | Method of curing inorganic concrete |
| JPS5813201A (en) * | 1981-07-15 | 1983-01-25 | Uchida Yuatsu Kiki Kogyo Kk | Hydarulic apparatus for press |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0276904A (en) * | 1988-06-29 | 1990-03-16 | Hitachi Constr Mach Co Ltd | Hydraulic drive device |
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