JPS5869086U - Hydraulic circuit for raising and lowering the boom of an earth drill - Google Patents
Hydraulic circuit for raising and lowering the boom of an earth drillInfo
- Publication number
- JPS5869086U JPS5869086U JP16374481U JP16374481U JPS5869086U JP S5869086 U JPS5869086 U JP S5869086U JP 16374481 U JP16374481 U JP 16374481U JP 16374481 U JP16374481 U JP 16374481U JP S5869086 U JPS5869086 U JP S5869086U
- Authority
- JP
- Japan
- Prior art keywords
- boom
- hydraulic circuit
- earth drill
- lowering
- raising
- 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)
- Earth Drilling (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図はアースドリルの全体側面図、第２図は従来のブ
ーム起伏用油圧回路の回路図、第３図は本考案に係るブ
ーム起伏用油圧回路の一実施例を示した回路図である。
１・・・・・・アースドリル本体、２・・・・・・ブー
ム、３・・・・・・ブームシリンダ、４・・・・・・ケ
リーバ、５・・・・・・ケリ −−バ駆動装置、６・・
・・・・ドリリングバケット、９・・・…カウンタバラ
ンスバルブ、１０・・・・・・コントロールバルブ、１
１・・・・・・リリーフバルブ、１２・・・・・・油圧
ポンプ、１３・・・・・・作動油タンク、１４・・・・
・・パイロットチェックバルブ。Fig. 1 is an overall side view of the earth drill, Fig. 2 is a circuit diagram of a conventional boom hoisting hydraulic circuit, and Fig. 3 is a circuit diagram showing an embodiment of the boom hoisting hydraulic circuit according to the present invention. . 1...Earth drill body, 2...Boom, 3...Boom cylinder, 4...Kelly bar, 5...Kelly bar Drive device, 6...
...Drilling bucket, 9...Counter balance valve, 10...Control valve, 1
1... Relief valve, 12... Hydraulic pump, 13... Hydraulic oil tank, 14...
...Pilot check valve.
Claims (1)
そのブームの先端からケリーゲを昇降可能に吊譚し、そ
のケリーバの下端に地盤を掘削するドリリングバケット
を取付け、前記アースドリル本体とブームとにブームシ
リンダめヘッドとロンドとをそれぞれ枢着し、そのブー
ムシリンダのロンドを伸縮させてブームの起伏を行うよ
うに構成したアースドリルのブーム起伏用油圧回路にお
いて、前記ブームシリンダのロンド側の油圧回路中にパ
イロットチェック弁を設けたことを特徴とするアースド
リルのブーム起伏用油圧回路。The base end of the boom is attached to the earth drill body so that it can be raised and lowered.
A kelige is suspended from the tip of the boom so that it can be raised and lowered, a drilling bucket for excavating the ground is attached to the lower end of the keireba, a boom cylinder head and a rond are respectively pivotally connected to the earth drill body and the boom. A boom hoisting hydraulic circuit for an earth drill configured to extend and contract a boom cylinder rond to raise and lower the boom, characterized in that a pilot check valve is provided in the hydraulic circuit on the rond side of the boom cylinder. Hydraulic circuit for hoisting the boom of a drill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16374481U JPS5869086U (en) | 1981-11-04 | 1981-11-04 | Hydraulic circuit for raising and lowering the boom of an earth drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16374481U JPS5869086U (en) | 1981-11-04 | 1981-11-04 | Hydraulic circuit for raising and lowering the boom of an earth drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5869086U true JPS5869086U (en) | 1983-05-11 |
Family
ID=29956029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16374481U Pending JPS5869086U (en) | 1981-11-04 | 1981-11-04 | Hydraulic circuit for raising and lowering the boom of an earth drill |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5869086U (en) |
-
1981
- 1981-11-04 JP JP16374481U patent/JPS5869086U/en active Pending
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