JPS63151558U - - Google Patents

Info

Publication number
JPS63151558U
JPS63151558U JP4403887U JP4403887U JPS63151558U JP S63151558 U JPS63151558 U JP S63151558U JP 4403887 U JP4403887 U JP 4403887U JP 4403887 U JP4403887 U JP 4403887U JP S63151558 U JPS63151558 U JP S63151558U
Authority
JP
Japan
Prior art keywords
valve
boom
hydraulic
pilot
hydraulic excavator
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
Application number
JP4403887U
Other languages
Japanese (ja)
Other versions
JPH0621973Y2 (en
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 filed Critical
Priority to JP1987044038U priority Critical patent/JPH0621973Y2/en
Publication of JPS63151558U publication Critical patent/JPS63151558U/ja
Application granted granted Critical
Publication of JPH0621973Y2 publication Critical patent/JPH0621973Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)

Description

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

第１図はこの考案にかかる油圧シヨベルの油圧
回路図、第２図は従来技術の油圧回路図である。 １……ブーム第１弁、２……ブーム第２弁、３
……旋回弁、４……旋回モータ、５……ブームシ
リンダ、９，１０……リモコン弁、１４……ブー
ム上昇用パイロツト弁、４３……絞り弁、４５…
…電磁弁。 FIG. 1 is a hydraulic circuit diagram of a hydraulic excavator according to this invention, and FIG. 2 is a hydraulic circuit diagram of a conventional technology. 1... Boom first valve, 2... Boom second valve, 3
... Swivel valve, 4 ... Swivel motor, 5 ... Boom cylinder, 9, 10 ... Remote control valve, 14 ... Pilot valve for boom elevation, 43 ... Throttle valve, 45 ...
…solenoid valve.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 油圧シヨベルに装備した各種油圧アクチユエー
タ制御用切換弁を２個のグループＡ，Ｂに分け、
そのグループＡ内に旋回弁とブーム第２弁とを並
列に設け、かつ、グループＢ内にブーム第１弁を
設け、また、グループＡ、グループＢのそれぞれ
圧油供給源として第１ポンプ、第２ポンプを配置
した油圧回路において、旋回モータ用圧油供給油
路に絞り弁を設け、その絞り弁のパイロツト圧受
圧部と、ブーム用リモコン弁のブーム上昇用パイ
ロツト弁とを連通するパイロツト油路に電磁弁を
設けたことを特徴とする油圧シヨベルの油圧回路
。 The switching valves for controlling various hydraulic actuators installed on the hydraulic excavator are divided into two groups A and B.
A swing valve and a second boom valve are provided in parallel in group A, and a first boom valve is provided in group B, and a first pump and a second boom valve are provided as pressure oil supply sources for groups A and B, respectively. In a hydraulic circuit in which two pumps are arranged, a throttle valve is provided in the pressure oil supply oil passage for the swing motor, and a pilot oil passage communicates the pilot pressure receiving part of the throttle valve with the boom lifting pilot valve of the boom remote control valve. A hydraulic circuit for a hydraulic excavator, characterized in that a solenoid valve is provided in the hydraulic excavator.
JP1987044038U 1987-03-24 1987-03-24 Hydraulic circuit of hydraulic shovel Expired - Lifetime JPH0621973Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1987044038U JPH0621973Y2 (en) 1987-03-24 1987-03-24 Hydraulic circuit of hydraulic shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987044038U JPH0621973Y2 (en) 1987-03-24 1987-03-24 Hydraulic circuit of hydraulic shovel

Publications (2)

Publication Number Publication Date
JPS63151558U true JPS63151558U (en) 1988-10-05
JPH0621973Y2 JPH0621973Y2 (en) 1994-06-08

Family

ID=30861470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987044038U Expired - Lifetime JPH0621973Y2 (en) 1987-03-24 1987-03-24 Hydraulic circuit of hydraulic shovel

Country Status (1)

Country Link
JP (1) JPH0621973Y2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019103001A1 (en) * 2017-11-22 2019-05-31 川崎重工業株式会社 Hydraulic drive system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49126101A (en) * 1973-04-05 1974-12-03
JPS62284835A (en) * 1986-06-03 1987-12-10 Sumitomo Heavy Ind Ltd Hydraulic circuit for hydraulic shovel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49126101A (en) * 1973-04-05 1974-12-03
JPS62284835A (en) * 1986-06-03 1987-12-10 Sumitomo Heavy Ind Ltd Hydraulic circuit for hydraulic shovel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019103001A1 (en) * 2017-11-22 2019-05-31 川崎重工業株式会社 Hydraulic drive system

Also Published As

Publication number Publication date
JPH0621973Y2 (en) 1994-06-08

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