JPH0190866U - - Google Patents

Info

Publication number
JPH0190866U
JPH0190866U JP18372187U JP18372187U JPH0190866U JP H0190866 U JPH0190866 U JP H0190866U JP 18372187 U JP18372187 U JP 18372187U JP 18372187 U JP18372187 U JP 18372187U JP H0190866 U JPH0190866 U JP H0190866U
Authority
JP
Japan
Prior art keywords
speed increasing
switching valve
hydraulic
actuator
pressure oil
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
JP18372187U
Other languages
Japanese (ja)
Other versions
JPH0619654Y2 (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 JP18372187U priority Critical patent/JPH0619654Y2/en
Publication of JPH0190866U publication Critical patent/JPH0190866U/ja
Application granted granted Critical
Publication of JPH0619654Y2 publication Critical patent/JPH0619654Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Operation Control Of Excavators (AREA)

Description

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

図面は本考案の一実施例の構成説明図である。 1,2は第1、第2のメインポンプ、3は補助
ポンプ、19は増速切換弁、Dは走行増速回路、
Eはアクチユエータ。
The drawing is an explanatory diagram of the configuration of an embodiment of the present invention. 1 and 2 are first and second main pumps, 3 is an auxiliary pump, 19 is a speed increase switching valve, D is a travel speed increase circuit,
E is actuator.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 3つの油圧ポンプを有してこの内2つのメイン
ポンプの圧油をそれぞれ片側の容量可変型の走行
モータと選択したフロント作業機のアクチユエー
タとへ供給するようにし、他の1つの補助ポンプ
の圧油を作業機のアクチユエータへ供給するよう
にした油圧掘削作業車両の油圧操作装置において
、前記補助ポンプの圧油回路に、中立ポジシヨン
の他に走行増速ポジシヨンと作業機増速ポジシヨ
ンとを有するセンタバイパス形3位置切換型の増
速切換弁を設け、この増速切換弁の一方の接続側
を、走行モータの斜板揺動切換弁に接続する走行
増速回路に接続し、増速切換弁の他方の接続側を
、フロント作業機のアクチユエータに接続する作
業増速回路に接続したことを特徴とする油圧掘削
作業車両の油圧操作装置。
It has three hydraulic pumps, and the pressure oil from two of the main pumps is supplied to the variable-capacity travel motor on one side and the actuator of the selected front work equipment, and the pressure oil from the other auxiliary pump is In a hydraulic operating device for a hydraulic excavation work vehicle configured to supply oil to an actuator of a working machine, the pressure oil circuit of the auxiliary pump has a center position in addition to a neutral position, a traveling speed increasing position and a working machine speed increasing position. A bypass type 3-position speed increasing switching valve is provided, and one connection side of this speed increasing switching valve is connected to a travel speed increasing circuit that connects to the swash plate rocking switching valve of the travel motor, and the speed increasing switching valve is A hydraulic operating device for a hydraulic excavation work vehicle, characterized in that the other connection side of the is connected to a work speed increasing circuit connected to an actuator of a front work machine.
JP18372187U 1987-12-03 1987-12-03 Hydraulic operating device for hydraulic excavation work vehicle Expired - Lifetime JPH0619654Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18372187U JPH0619654Y2 (en) 1987-12-03 1987-12-03 Hydraulic operating device for hydraulic excavation work vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18372187U JPH0619654Y2 (en) 1987-12-03 1987-12-03 Hydraulic operating device for hydraulic excavation work vehicle

Publications (2)

Publication Number Publication Date
JPH0190866U true JPH0190866U (en) 1989-06-14
JPH0619654Y2 JPH0619654Y2 (en) 1994-05-25

Family

ID=31475132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18372187U Expired - Lifetime JPH0619654Y2 (en) 1987-12-03 1987-12-03 Hydraulic operating device for hydraulic excavation work vehicle

Country Status (1)

Country Link
JP (1) JPH0619654Y2 (en)

Also Published As

Publication number Publication date
JPH0619654Y2 (en) 1994-05-25

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