JPS5961353U - excavator hydraulic circuit - Google Patents
excavator hydraulic circuitInfo
- Publication number
- JPS5961353U JPS5961353U JP15486182U JP15486182U JPS5961353U JP S5961353 U JPS5961353 U JP S5961353U JP 15486182 U JP15486182 U JP 15486182U JP 15486182 U JP15486182 U JP 15486182U JP S5961353 U JPS5961353 U JP S5961353U
- Authority
- JP
- Japan
- Prior art keywords
- arm
- valve
- pressure oil
- supply pipe
- oil supply
- 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)
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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
図は本考案の掘削機の油圧回路を示す。
図中１はエンジン、２，３．４はポンプ、５，６゜６′
、８は圧油供給管、１４はアーム第１操作弁、１６はブ
ーム操作弁、１７はアーム第２操作弁、１８．１９，４
５．４８はリリーフ弁、４０．４０’。
４１．４６．４７は管、４２はアームシリンダ、５２は
パケットシリンダを示す。
−The figure shows the hydraulic circuit of the excavator of the present invention. In the figure, 1 is the engine, 2, 3.4 is the pump, 5, 6° 6'
, 8 is a pressure oil supply pipe, 14 is an arm first operation valve, 16 is a boom operation valve, 17 is an arm second operation valve, 18.19, 4
5.48 is the relief valve, 40.40'. 41, 46, 47 are tubes, 42 is an arm cylinder, and 52 is a packet cylinder. −
Claims (1)
作弁を設けて該操作弁によりパケットシリンダを作動さ
せるようにし、第２のポンプに接゛ 続した第２の
圧油供給管に上流側よりアーム第１操作弁とアーム第２
操作弁とを順次設けて両操作弁に圧油をアームシリンダ
へ送る管を接続し、弟子のポンプに接続した第３の圧油
供給管を前記アーム第１操作弁とアーム第２操作弁との
間で第２の圧油供給管に接続し、前記アーム第１操作弁
からアームシリンダへピストンロンドが突出するよう圧
油を供給する管に、アームシリンダ側からアーム第１操
作弁側へ油が逆流するのを防止する逆止弁を設け、前記
ア、−ム第１操作弁からピストンロンドが突出するよう
圧油を送る管の逆止弁を設けた位置よりもアーム第１操
作弁に近い位置に、前記第２の圧油供給管や第３の圧油
供給管に接続したリリーフ弁より低い圧力で作動し得る
リリーフ弁を設けたことを特徴とする掘削機の油圧回路
。A packet operation valve is provided in the first pressure oil supply pipe connected to the first pump so that the packet cylinder is operated by the operation valve, and a packet operation valve is provided in the second pressure oil supply pipe connected to the second pump. From the upstream side, arm 1 operation valve and arm 2
A third pressure oil supply pipe connected to the apprentice's pump is connected to the first arm operating valve and the second arm operating valve. is connected to a second pressure oil supply pipe between the arm cylinder side and the pipe that supplies pressure oil so that the piston rond protrudes from the arm first operation valve to the arm cylinder. A check valve is provided to prevent backflow of the oil, and the piston rod is placed closer to the arm first operating valve than the position where the check valve is provided in the pipe that sends the pressure oil so that the piston rond protrudes from the arm first operating valve. A hydraulic circuit for an excavator, characterized in that a relief valve that can operate at a lower pressure than a relief valve connected to the second pressure oil supply pipe or the third pressure oil supply pipe is provided at a nearby position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15486182U JPS5961353U (en) | 1982-10-13 | 1982-10-13 | excavator hydraulic circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15486182U JPS5961353U (en) | 1982-10-13 | 1982-10-13 | excavator hydraulic circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5961353U true JPS5961353U (en) | 1984-04-21 |
Family
ID=30342189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15486182U Pending JPS5961353U (en) | 1982-10-13 | 1982-10-13 | excavator hydraulic circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5961353U (en) |
-
1982
- 1982-10-13 JP JP15486182U patent/JPS5961353U/en active Pending
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