JPS61155450U - - Google Patents
Info
- Publication number
- JPS61155450U JPS61155450U JP3613585U JP3613585U JPS61155450U JP S61155450 U JPS61155450 U JP S61155450U JP 3613585 U JP3613585 U JP 3613585U JP 3613585 U JP3613585 U JP 3613585U JP S61155450 U JPS61155450 U JP S61155450U
- Authority
- JP
- Japan
- Prior art keywords
- switching valve
- bucket
- position switching
- hydraulic cylinder
- excavation bucket
- 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
- 238000009412 basement excavation Methods 0.000 claims 4
- 230000007935 neutral effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Description
第１図は本考案の一実施例を示す電気油圧回路
図、第２図は本考案による３位置切換弁制御用電
気回路の一例を示す電気回路図である。
FIG. 1 is an electro-hydraulic circuit diagram showing an embodiment of the present invention, and FIG. 2 is an electric circuit diagram showing an example of an electric circuit for controlling a three-position switching valve according to the present invention.
Claims (1)
圧シリンダの作動を制御する電磁操作部を有する
３位置切換弁との間の油圧回路にセルフシールジ
ヨイントを設けた掘削用バケツトの制御回路にお
いて、前記３位置切換弁はその中立位置にて前記
油圧シリンダのピストン上室、下室を共に前記セ
ルフシールジヨイントを介して油タンクに連通さ
せる構成を有し、かつ前記３位置切換弁の電磁操
作部に対する通電を制御する電気回路に、バケツ
ト閉を指令する信号により前記３位置切換弁をバ
ケツトを閉とする位置に保持する保持回路を設け
たことを特徴とする掘削用バケツトの制御回路。 A control circuit for an excavation bucket, in which a self-sealing joint is provided in the hydraulic circuit between a hydraulic cylinder for opening and closing the excavation bucket and a three-position switching valve having an electromagnetic operation section for controlling the operation of the hydraulic cylinder. The three-position switching valve has a configuration in which, in its neutral position, both the upper and lower piston chambers of the hydraulic cylinder communicate with the oil tank via the self-seal joint, and the electromagnetic operating section of the three-position switching valve 1. A control circuit for an excavation bucket, characterized in that an electric circuit for controlling energization of the excavation bucket is provided with a holding circuit that holds the three-position switching valve at a position where the bucket is closed in response to a signal commanding closing of the bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3613585U JPS61155450U (en) | 1985-03-15 | 1985-03-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3613585U JPS61155450U (en) | 1985-03-15 | 1985-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61155450U true JPS61155450U (en) | 1986-09-26 |
Family
ID=30541049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3613585U Pending JPS61155450U (en) | 1985-03-15 | 1985-03-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61155450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0285018A (en) * | 1988-07-26 | 1990-03-26 | Clark Equip Co | Auxiliary joint pressure relief hydraulic device |
-
1985
- 1985-03-15 JP JP3613585U patent/JPS61155450U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0285018A (en) * | 1988-07-26 | 1990-03-26 | Clark Equip Co | Auxiliary joint pressure relief hydraulic device |
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