JPS6123352U - Hydraulic circuit of a hydraulic shovel that also serves as a crane - Google Patents
Hydraulic circuit of a hydraulic shovel that also serves as a craneInfo
- Publication number
- JPS6123352U JPS6123352U JP10584384U JP10584384U JPS6123352U JP S6123352 U JPS6123352 U JP S6123352U JP 10584384 U JP10584384 U JP 10584384U JP 10584384 U JP10584384 U JP 10584384U JP S6123352 U JPS6123352 U JP S6123352U
- Authority
- JP
- Japan
- Prior art keywords
- hydraulic
- crane
- serves
- hydraulic cylinder
- 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
- Operation Control Of Excavators (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Fluid Pressure (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図は本考案のクレーン兼用の油圧ショベルの油圧回
路の一実施例の概略構成を示す回路図、第２図及び第３
図は本考案が適用されるクレーン兼用の油圧ショベルの
一例を示す説明図で、第２図は通常の掘削作業時におけ
る形態を示す側面図、第３図はクレーン作業時における
形態を示す側面図、第４図は従来のクレーン兼用の油圧
ショベルの油圧回路の概略構成を示す回路図である。
３・・・・・・ブーム、４・・・・・・ブームシリンダ
、５・曲・アーム、６・・・・・・アームシリンダ、７
・・・・・・パケット、８・・・・・・パケットシリン
ダ、１１・・・・・・可変容量油圧ポンプ、１４・・・
・・・方向制御弁、１６，１７・・・−・・・管路、１
８・・・・・・ホールディングバルブ、１９・・・・・
・パイロットチェック弁、２０・・・・・・過負荷防止
弁、２１・・・・・・パイロット管路、２６・曲・ポペ
ット、２７・・・・・・スプリング、２８・・・・・・
弁本体、２９・・・・・・ねじ部、３０・・・・・・ス
プリング受、３１・・曲ねじ。FIG. 1 is a circuit diagram showing a schematic configuration of an embodiment of the hydraulic circuit of a hydraulic excavator that can also be used as a crane according to the present invention, and FIGS.
The figure is an explanatory view showing an example of a hydraulic excavator that can also be used as a crane to which the present invention is applied. Fig. 2 is a side view showing the form during normal excavation work, and Fig. 3 is a side view showing the form during crane work. , FIG. 4 is a circuit diagram showing a schematic configuration of a hydraulic circuit of a conventional hydraulic excavator that also serves as a crane. 3...Boom, 4...Boom cylinder, 5, curved arm, 6...Arm cylinder, 7
... Packet, 8 ... Packet cylinder, 11 ... Variable displacement hydraulic pump, 14 ...
...Directional control valve, 16, 17...Pipe line, 1
8...Holding valve, 19...
・Pilot check valve, 20... Overload prevention valve, 21... Pilot pipe line, 26... Bent poppet, 27... Spring, 28...
Valve body, 29... Threaded part, 30... Spring holder, 31... Bent thread.
Claims (1)
駆動を制御する方向制御弁とを備えるとともに、上記油
圧シリンダと上記方向制御弁との間に、当該油圧シリン
ダの過負荷防止弁を有するホールディングバルブを備え
たクレーン兼用の油圧ショベルの油圧回路において、上
記過負荷防止弁の設定圧力を調整可能な設定圧力調整手
段を設けたことを特徴とするクレーン兼用の油圧ショベ
ルの油圧回路。A holding valve that includes a hydraulic cylinder that drives a load body and a directional control valve that controls the drive of the hydraulic cylinder, and that has an overload prevention valve for the hydraulic cylinder between the hydraulic cylinder and the directional control valve. A hydraulic circuit for a hydraulic excavator that can also be used as a crane, characterized in that the hydraulic circuit for a hydraulic excavator that can also be used as a crane is provided with a set pressure adjustment means that can adjust the set pressure of the overload prevention valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584384U JPS6123352U (en) | 1984-07-14 | 1984-07-14 | Hydraulic circuit of a hydraulic shovel that also serves as a crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10584384U JPS6123352U (en) | 1984-07-14 | 1984-07-14 | Hydraulic circuit of a hydraulic shovel that also serves as a crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6123352U true JPS6123352U (en) | 1986-02-12 |
Family
ID=30665148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10584384U Pending JPS6123352U (en) | 1984-07-14 | 1984-07-14 | Hydraulic circuit of a hydraulic shovel that also serves as a crane |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6123352U (en) |
-
1984
- 1984-07-14 JP JP10584384U patent/JPS6123352U/en active Pending
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