JPS60126550U - Hydraulic excavator hydraulic circuit - Google Patents

Hydraulic excavator hydraulic circuit

Info

Publication number
JPS60126550U
JPS60126550U JP1023584U JP1023584U JPS60126550U JP S60126550 U JPS60126550 U JP S60126550U JP 1023584 U JP1023584 U JP 1023584U JP 1023584 U JP1023584 U JP 1023584U JP S60126550 U JPS60126550 U JP S60126550U
Authority
JP
Japan
Prior art keywords
hydraulic
circuit
boom cylinder
excavator
pipe
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
Application number
JP1023584U
Other languages
Japanese (ja)
Inventor
東一 平田
玄六 杉山
Original Assignee
日立建機株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 日立建機株式会社 filed Critical 日立建機株式会社
Priority to JP1023584U priority Critical patent/JPS60126550U/en
Publication of JPS60126550U publication Critical patent/JPS60126550U/en
Pending legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)
  • 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) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図および第２図は油圧ショベルの吊り荷作二用に、
？：：雷嵩＝九でご＝六 ４図は本考案の第１の実施例に係る油圧ショベルの油圧
回路の要部を示す回路図、第５図は本考案の第２の実施
例に係る油圧ショベルの油圧回路の要部を示す回路図で
ある。 １・・・・・・旋回体、２・・・・・・走行体、３・・
・・・・ブーム、４・・曲アーム、５・・曲パケット、
６・・曲ブ―ムシ　　　−リング、７・・・・・・アー
云シリンダ、８・・曲パケットシリンダ、９・・・・・
・走行モータ、１０・・開旋回モー　　　　−夕、１１
・・・・・・荷、１２・・・・・・油圧ポンプ、１３，
１４・・・・・・方向切換弁、２０・・・・・・ＩＪ　
ＩＪ−フ弁、２１゜２２・・・・・・管路、２３・・曲
タンク、２５．　２６・・間オーバーロードリリーフ弁
、２７・・・・・・油圧源、２８五・・・ＩＪ　ＩＪ−
フ弁、２９・・・・・・切換弁、３０・・四電磁リリー
フ弁。 １１日１ ２１」　　　［＼二二マτ−１２−１−一二−−４ ＋　　　　　、２／７　　　　　−Figures 1 and 2 are for lifting loads on a hydraulic excavator.
? ::RAIDAKE=KUDEGO=64 Figure is a circuit diagram showing the main parts of the hydraulic circuit of a hydraulic excavator according to the first embodiment of the present invention, and Figure 5 is a circuit diagram according to the second embodiment of the present invention. FIG. 2 is a circuit diagram showing main parts of a hydraulic circuit of a hydraulic excavator. 1... Rotating body, 2... Traveling body, 3...
・・・Boom, 4...Song arm, 5...Song packet,
6...Song boom sealing, 7...Arun cylinder, 8...Song packet cylinder, 9...
・Travel motor, 10... Open turning motor - evening, 11
...Load, 12...Hydraulic pump, 13,
14... Directional switching valve, 20... IJ
IJ-F valve, 21°22...Pipe line, 23...Curved tank, 25. 26...Overload relief valve, 27...Hydraulic pressure source, 285...IJ IJ-
valve, 29... switching valve, 30... four electromagnetic relief valves. 11th 1 21'' [\22ma τ-12-1-12--4 +, 2/7 -

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 油圧ポンプと、この油圧ポンプから吐出される圧油によ
って駆動されるブームシリンダと、このブームシリンダ
の駆動を制御する方向切換弁と、この方向切換弁と前記
ブームシリンダのボトム側とを接続する管路と、この管
路とタンクとの間に設けられたオーバーロードリリーフ
弁とを備えた油圧ショベルの油圧回路において、前記オ
ーバーロードリリーフ弁に設定圧可変用のパイロット圧
供給手段を設けたことを特徴とする油圧ショベルの油圧
回路。A hydraulic pump, a boom cylinder driven by pressure oil discharged from the hydraulic pump, a directional switching valve for controlling the drive of the boom cylinder, and a pipe connecting the directional switching valve and the bottom side of the boom cylinder. In a hydraulic circuit for a hydraulic excavator including a pipe and an overload relief valve provided between the pipe and the tank, the overload relief valve is provided with a pilot pressure supply means for varying the set pressure. Hydraulic circuit of hydraulic excavator features.
JP1023584U 1984-01-30 1984-01-30 Hydraulic excavator hydraulic circuit Pending JPS60126550U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1023584U JPS60126550U (en) 1984-01-30 1984-01-30 Hydraulic excavator hydraulic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1023584U JPS60126550U (en) 1984-01-30 1984-01-30 Hydraulic excavator hydraulic circuit

Publications (1)

Publication Number Publication Date
JPS60126550U true JPS60126550U (en) 1985-08-26

Family

ID=30491228

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1023584U Pending JPS60126550U (en) 1984-01-30 1984-01-30 Hydraulic excavator hydraulic circuit

Country Status (1)

Country Link
JP (1) JPS60126550U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264560A (en) * 2008-04-28 2009-11-12 Kobelco Contstruction Machinery Ltd Pressure pulsation absorption device for hydraulic construction machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508881U (en) * 1973-05-21 1975-01-29
JPS5063704A (en) * 1973-07-24 1975-05-30
JPS5616736A (en) * 1979-07-19 1981-02-18 Kobe Steel Ltd Hydraulic circuit for hydraulic power shovel

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS508881U (en) * 1973-05-21 1975-01-29
JPS5063704A (en) * 1973-07-24 1975-05-30
JPS5616736A (en) * 1979-07-19 1981-02-18 Kobe Steel Ltd Hydraulic circuit for hydraulic power shovel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009264560A (en) * 2008-04-28 2009-11-12 Kobelco Contstruction Machinery Ltd Pressure pulsation absorption device for hydraulic construction machine

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