JPS646421A - Oil-pressure circuit for working machine of construction machinery - Google Patents

Oil-pressure circuit for working machine of construction machinery

Info

Publication number
JPS646421A
JPS646421A JP16094187A JP16094187A JPS646421A JP S646421 A JPS646421 A JP S646421A JP 16094187 A JP16094187 A JP 16094187A JP 16094187 A JP16094187 A JP 16094187A JP S646421 A JPS646421 A JP S646421A
Authority
JP
Japan
Prior art keywords
cylinders
cylinder
lift
blade
bilateral
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
JP16094187A
Other languages
Japanese (ja)
Other versions
JPH086344B2 (en
Inventor
Tsuguaki Nakamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Komatsu Ltd
Original Assignee
Komatsu Ltd
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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP16094187A priority Critical patent/JPH086344B2/en
Publication of JPS646421A publication Critical patent/JPS646421A/en
Publication of JPH086344B2 publication Critical patent/JPH086344B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To control flow rates supplied to each cylinder with high accuracy by providing a valve by which each cylinder of bilateral lift angles and tilt pitches, at least one of which is made up of both rod cylinders, is switched to parallel or serial connection. CONSTITUTION:Bilateral lift angle cylinders 91 and 92 among the cylinders 91 and 92 and bilateral tilt pitch cylinders 191 and 192 which are provided for a bulldozer are made up of both rod cylinders. When a blade 12 is lifted for example, oil pressure goes through a lift position 292 into the left side lift angle cylinder 91 at first to short-circuit a piston lever 9d and at the same time goes through a lift position 292 from a pressure chamber 9g into the right side cylinder 92 to contract the piston lever 9d by the same amount as in the left side. The blade 12 is thereby raised. The 8-direction action of the blade can thus be performed smoothly and exactly.
JP16094187A 1987-06-30 1987-06-30 Working machine hydraulic circuit of construction machine Expired - Lifetime JPH086344B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16094187A JPH086344B2 (en) 1987-06-30 1987-06-30 Working machine hydraulic circuit of construction machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16094187A JPH086344B2 (en) 1987-06-30 1987-06-30 Working machine hydraulic circuit of construction machine

Publications (2)

Publication Number Publication Date
JPS646421A true JPS646421A (en) 1989-01-11
JPH086344B2 JPH086344B2 (en) 1996-01-24

Family

ID=15725534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16094187A Expired - Lifetime JPH086344B2 (en) 1987-06-30 1987-06-30 Working machine hydraulic circuit of construction machine

Country Status (1)

Country Link
JP (1) JPH086344B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383257U (en) * 1989-12-07 1991-08-23
JP2014185443A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device
JP2014185439A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device
JP2014185442A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0383257U (en) * 1989-12-07 1991-08-23
JP2014185443A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device
JP2014185439A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device
JP2014185442A (en) * 2013-03-22 2014-10-02 Nippon Sharyo Seizo Kaisha Ltd Tubing device

Also Published As

Publication number Publication date
JPH086344B2 (en) 1996-01-24

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