JPH0426263U - - Google Patents

Info

Publication number
JPH0426263U
JPH0426263U JP6535190U JP6535190U JPH0426263U JP H0426263 U JPH0426263 U JP H0426263U JP 6535190 U JP6535190 U JP 6535190U JP 6535190 U JP6535190 U JP 6535190U JP H0426263 U JPH0426263 U JP H0426263U
Authority
JP
Japan
Prior art keywords
boom
arm
bucket
pressure
hydraulic circuit
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
JP6535190U
Other languages
Japanese (ja)
Other versions
JP2511165Y2 (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 JP1990065351U priority Critical patent/JP2511165Y2/en
Publication of JPH0426263U publication Critical patent/JPH0426263U/ja
Application granted granted Critical
Publication of JP2511165Y2 publication Critical patent/JP2511165Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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]

図面は本考案に係るパワーシヨベルのリリーフ
圧制御装置の実施例を構成を概念的に示す図であ
る。 １……可変容量型油圧ポンプ、２……作業機油
圧回路、３……ブーム用油圧シリンダ、４……可
変型リリーフ弁、５……パイロツト用通路、６…
…電磁切換弁、７……コントロールポンプ、８…
…ヘビーリフトスイツチ、９，１０，１１……圧
力スイツチ、１２，１３……バツテリ、１４……
リレー。 The drawing is a diagram conceptually showing the configuration of an embodiment of a relief pressure control device for a power shovel according to the present invention. DESCRIPTION OF SYMBOLS 1... Variable capacity hydraulic pump, 2... Work equipment hydraulic circuit, 3... Hydraulic cylinder for boom, 4... Variable relief valve, 5... Pilot passage, 6...
...Solenoid switching valve, 7...Control pump, 8...
...Heavy lift switch, 9,10,11...Pressure switch, 12,13...Battery, 14...
relay.

Claims (1)

【実用新案登録請求の範囲】 油圧ポンプの吐出圧油を作業機油圧回路を介し
てブーム、アームおよびバケツトを駆動するアク
チユエータに供給して、これらブーム、アームお
よびバケツトを作動させるパワーシヨベルにおい
て、 前記作業機油圧回路内の圧力を高、低２段階に
可変設定する可変型リリーフ弁と、 前記ブーム、アームおよびバケツトの作動状態
をそれぞれ検出する検出手段と、 前記検出手段によつてアームおよびバケツトが
定位置に固定されるとともにブームが上昇してい
ることが検出された場合に、前記作業機油圧回路
内の圧力が高圧になるように前記可変型リリーフ
弁を可変する手段と を具えたことを特徴とするパワーシヨベルのリリ
ーフ圧制御装置。[Claim for Utility Model Registration] In a power shovel that operates a boom, arm, and bucket by supplying pressure oil discharged from a hydraulic pump to an actuator that drives the boom, arm, and bucket via a work equipment hydraulic circuit, A variable relief valve that variably sets the pressure in the machine hydraulic circuit in two stages, high and low; a detection means that detects the operating states of the boom, arm, and bucket; and a detection means that determines the position of the arm and bucket. It is characterized by comprising means for varying the variable relief valve so that the pressure in the working machine hydraulic circuit becomes high pressure when it is detected that the boom is fixed in position and is rising. Relief pressure control device for power shovels.
JP1990065351U 1990-06-20 1990-06-20 Relief pressure control device for power shovel Expired - Fee Related JP2511165Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990065351U JP2511165Y2 (en) 1990-06-20 1990-06-20 Relief pressure control device for power shovel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990065351U JP2511165Y2 (en) 1990-06-20 1990-06-20 Relief pressure control device for power shovel

Publications (2)

Publication Number Publication Date
JPH0426263U true JPH0426263U (en) 1992-03-02
JP2511165Y2 JP2511165Y2 (en) 1996-09-18

Family

ID=31597103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990065351U Expired - Fee Related JP2511165Y2 (en) 1990-06-20 1990-06-20 Relief pressure control device for power shovel

Country Status (1)

Country Link
JP (1) JP2511165Y2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053337A1 (en) * 2002-12-10 2004-06-24 Shin Caterpillar Mitsubishi Ltd. Automatic booster for working machines
JP2010223390A (en) * 2009-03-25 2010-10-07 Kobelco Contstruction Machinery Ltd Hydraulic pump control device for construction machine
US10358798B2 (en) 2016-02-08 2019-07-23 Komatsu Ltd. Work vehicle and method of controlling operation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138026A (en) * 1986-11-27 1988-06-10 Yutani Heavy Ind Ltd Oil-pressure circuit of oil-pressure shovel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63138026A (en) * 1986-11-27 1988-06-10 Yutani Heavy Ind Ltd Oil-pressure circuit of oil-pressure shovel

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053337A1 (en) * 2002-12-10 2004-06-24 Shin Caterpillar Mitsubishi Ltd. Automatic booster for working machines
JP2010223390A (en) * 2009-03-25 2010-10-07 Kobelco Contstruction Machinery Ltd Hydraulic pump control device for construction machine
US10358798B2 (en) 2016-02-08 2019-07-23 Komatsu Ltd. Work vehicle and method of controlling operation
DE112016000048B4 (en) 2016-02-08 2023-10-19 Komatsu Ltd. Work vehicle and method for controlling work processes

Also Published As

Publication number Publication date
JP2511165Y2 (en) 1996-09-18

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Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees