JPS61112069U - - Google Patents

Info

Publication number
JPS61112069U
JPS61112069U JP20018284U JP20018284U JPS61112069U JP S61112069 U JPS61112069 U JP S61112069U JP 20018284 U JP20018284 U JP 20018284U JP 20018284 U JP20018284 U JP 20018284U JP S61112069 U JPS61112069 U JP S61112069U
Authority
JP
Japan
Prior art keywords
pilot
valve
swing
controls
power source
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
JP20018284U
Other languages
Japanese (ja)
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 JP20018284U priority Critical patent/JPS61112069U/ja
Publication of JPS61112069U publication Critical patent/JPS61112069U/ja
Pending legal-status Critical Current

Links

Landscapes

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

Description

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

第１図は本考案油圧回路の第１実施例を示す油
圧回路図、第２図は同第２実施例を示す油圧回路
図、第３図は従来の油圧シヨベルの油圧回路図で
ある。 ２……パイロツトポンプ、３……ブームシリン
ダ、４……ブーム用方向切換弁、５……旋回モー
タ、６……旋回用方向切換弁、９……ブーム用パ
イロツト弁、１０……旋回用パイロツト、１１…
…補助油圧源、１３，１７……ブロツク弁、１３
ａ，１７ｂ……パイロツト部。 FIG. 1 is a hydraulic circuit diagram showing a first embodiment of the hydraulic circuit of the present invention, FIG. 2 is a hydraulic circuit diagram showing a second embodiment of the same, and FIG. 3 is a hydraulic circuit diagram of a conventional hydraulic excavator. 2... Pilot pump, 3... Boom cylinder, 4... Boom directional control valve, 5... Swing motor, 6... Swing directional control valve, 9... Boom pilot valve, 10... Swing pilot , 11...
...Auxiliary hydraulic power source, 13, 17...Block valve, 13
a, 17b... Pilot section.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 旋回モータの駆動・停止を直接制御するクロー
ズドセンタ型の旋回用方向切換弁と、この切換弁
のパイロツト圧を制御する旋回用パイロツト弁と
、他のアクチユエータの方向切換弁のパイロツト
圧を制御するパイロツト弁と、前記旋回用パイロ
ツト弁と他のパイロツト弁に補助油圧源を介して
並列に接続するパイロツトポンプとを備えて成る
建設機械の油圧回路において、前記旋回用パイロ
ツト弁の入力側管路あるいは出力管路に、旋回用
パイロツト弁の機能を停止するブロツク弁を設け
、このブロツク弁のパイロツト部を、パイロツト
ポンプと補助油圧源との間に接続した建設機械の
油圧回路。 A closed center type swing directional switching valve that directly controls the drive and stop of the swing motor, a swing pilot valve that controls the pilot pressure of this switching valve, and a pilot that controls the pilot pressure of the directional switching valves of other actuators. In a hydraulic circuit of a construction machine comprising a valve and a pilot pump connected in parallel to the swing pilot valve and another pilot valve via an auxiliary hydraulic power source, the input side pipe or the output of the swing pilot valve is A hydraulic circuit for construction machinery in which a block valve for stopping the function of a swing pilot valve is provided in a conduit, and the pilot part of this block valve is connected between a pilot pump and an auxiliary hydraulic power source.
JP20018284U 1984-12-25 1984-12-25 Pending JPS61112069U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20018284U JPS61112069U (en) 1984-12-25 1984-12-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20018284U JPS61112069U (en) 1984-12-25 1984-12-25

Publications (1)

Publication Number Publication Date
JPS61112069U true JPS61112069U (en) 1986-07-15

Family

ID=30760791

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20018284U Pending JPS61112069U (en) 1984-12-25 1984-12-25

Country Status (1)

Country Link
JP (1) JPS61112069U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018399A1 (en) * 1993-02-09 1994-08-18 Hitachi Construction Machinery Co., Ltd. Hydraulic driving device for a construction machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941532A (en) * 1982-09-02 1984-03-07 Hitachi Constr Mach Co Ltd Oil-pressure circuit for slewing operation

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941532A (en) * 1982-09-02 1984-03-07 Hitachi Constr Mach Co Ltd Oil-pressure circuit for slewing operation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994018399A1 (en) * 1993-02-09 1994-08-18 Hitachi Construction Machinery Co., Ltd. Hydraulic driving device for a construction machine

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