JPS59139602U - Work equipment drive circuit device - Google Patents
Work equipment drive circuit deviceInfo
- Publication number
- JPS59139602U JPS59139602U JP3229583U JP3229583U JPS59139602U JP S59139602 U JPS59139602 U JP S59139602U JP 3229583 U JP3229583 U JP 3229583U JP 3229583 U JP3229583 U JP 3229583U JP S59139602 U JPS59139602 U JP S59139602U
- Authority
- JP
- Japan
- Prior art keywords
- pump
- spool
- oil
- main valve
- working machine
- 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.)
- Granted
Links
Landscapes
- Operation Control Of Excavators (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、第２図は従来の作業機の駆動回路装置
、の構成説明図、第３図、第４図は本考案−実施例の
構成説明図、第５図、第６図はアンロードバルブの作動
説明図である。
１は第１ポンプ、２は第２ポンプ、３．５はコントロー
ルバルブ、６はアンロードバルブ、５５はシャトル弁。Figures 1 and 2 are drive circuit devices for conventional work equipment.
, FIGS. 3 and 4 are explanatory diagrams of the configuration of the embodiment of the present invention, and FIGS. 5 and 6 are explanatory diagrams of the operation of the unload valve. 1 is a first pump, 2 is a second pump, 3.5 is a control valve, 6 is an unload valve, and 55 is a shuttle valve.
Claims (1)
てスプール１８の作動により第１ポンプ１からの圧油の
一方の作業機シリンダＢへの給排を行いこの作業機シリ
ンダＢを作動する一方のメインバルブ１７ａと、パイロ
ット圧を受けてスプール１８′の作動により第１ポンプ
１からの圧油の他方の作業機シリンダＢ′への給排を行
いこの作業機シリンダＢ′を作動する他方のメインバル
ブ１７と、スプール１９の移動操作により作動油を他方
のメインバルブ１７の切換用のパイロット圧として取出
す他方のコントロールバルブ５と、スプール１９ａの移
動操作により第２ポンプ２からの圧油を一方のメインバ
ルブ１７ａの切換用めパイロット圧及びコントロールバ
ルブ５への作動油として取出すと共にスプール１９ａが
中立位置で他方のメインバルブ１７のもどり油をタンク
側に導き且つスプール１９ａの操作位置で前記もどす油
の回路を閉じる一方のコントロールバルブ５ａとを備え
たことを特徴とする作業機の駆動回路装置。The first pump 1, the second pump 2, and the operation of the spool 18 in response to pilot pressure supply and discharge pressure oil from the first pump 1 to one of the working machine cylinders B, and operate this working machine cylinder B. Pressure oil from the first pump 1 is supplied and discharged from the first pump 1 to the other working machine cylinder B' by operating the main valve 17a on one side and the spool 18' in response to pilot pressure, thereby operating this working machine cylinder B'. The other main valve 17 and the other control valve 5, which takes out hydraulic oil as pilot pressure for switching the other main valve 17 by moving the spool 19, and the pressure oil from the second pump 2 by moving the spool 19a. is taken out as pilot pressure for switching one main valve 17a and hydraulic oil for the control valve 5, and when the spool 19a is in the neutral position, the return oil from the other main valve 17 is guided to the tank side, and when the spool 19a is in the operating position, A drive circuit device for a work machine, comprising: a control valve 5a for closing a circuit for returning oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3229583U JPS59139602U (en) | 1983-03-08 | 1983-03-08 | Work equipment drive circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3229583U JPS59139602U (en) | 1983-03-08 | 1983-03-08 | Work equipment drive circuit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59139602U true JPS59139602U (en) | 1984-09-18 |
| JPH0122965Y2 JPH0122965Y2 (en) | 1989-07-13 |
Family
ID=30163124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3229583U Granted JPS59139602U (en) | 1983-03-08 | 1983-03-08 | Work equipment drive circuit device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59139602U (en) |
-
1983
- 1983-03-08 JP JP3229583U patent/JPS59139602U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0122965Y2 (en) | 1989-07-13 |
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