JPH01103684U - - Google Patents
Info
- Publication number
- JPH01103684U JPH01103684U JP20072987U JP20072987U JPH01103684U JP H01103684 U JPH01103684 U JP H01103684U JP 20072987 U JP20072987 U JP 20072987U JP 20072987 U JP20072987 U JP 20072987U JP H01103684 U JPH01103684 U JP H01103684U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic circuit
- motor
- switching valve
- pressure
- pilot
- 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
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Control And Safety Of Cranes (AREA)
- Jib Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Description
第１図は本考案の一実施例を示す油圧回路図、
第２図は該実施例に用いられる電気回路図である
。
４は可変容量モータ、５は往路、６は復路、１
５は電磁切換弁、１８はパイロツト切換弁、１９
はパイロツトライン、２０はレギユレータ用シリ
ンダ、２１は圧力スイツチ、２３は高低２速切換
スイツチを示す。
FIG. 1 is a hydraulic circuit diagram showing an embodiment of the present invention;
FIG. 2 is an electrical circuit diagram used in this embodiment. 4 is a variable capacity motor, 5 is an outbound trip, 6 is a return trip, 1
5 is a solenoid switching valve, 18 is a pilot switching valve, 19
20 is a pilot line, 20 is a regulator cylinder, 21 is a pressure switch, and 23 is a high/low two speed changeover switch.
Claims (1)
容量モータとし、該モータの油圧回路の圧力をパ
イロツト切換弁を介してレギユレータ用シリンダ
に導びく様にし、該パイロツト切換弁用のパイロ
ツトラインに電磁切換弁を設け、２速切換スイツ
チのＯＮ―ＯＦＦにより該電磁切換弁でパイロツ
トラインの通断を行わせ、モータの油圧回路に設
けられ該油圧回路のリリーフ圧より低い圧力で動
作する圧力スイツチの動作で前記電磁切換弁によ
りパイロツトラインの断を行わせる様構成したこ
とを特徴とするブーム起伏装置の油圧回路。 The hydraulic motor for raising and lowering the boom is a variable displacement motor, and the pressure of the motor's hydraulic circuit is guided to the regulator cylinder via a pilot switching valve, and the pilot line for the pilot switching valve is electromagnetically switched. A pressure switch is provided in the hydraulic circuit of the motor and operates at a pressure lower than the relief pressure of the hydraulic circuit. A hydraulic circuit for a boom hoisting device, characterized in that the solenoid switching valve is configured to disconnect a pilot line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20072987U JPH01103684U (en) | 1987-12-28 | 1987-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20072987U JPH01103684U (en) | 1987-12-28 | 1987-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01103684U true JPH01103684U (en) | 1989-07-13 |
Family
ID=31491122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20072987U Pending JPH01103684U (en) | 1987-12-28 | 1987-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01103684U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627198U (en) * | 1979-08-08 | 1981-03-13 |
-
1987
- 1987-12-28 JP JP20072987U patent/JPH01103684U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5627198U (en) * | 1979-08-08 | 1981-03-13 |
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