EP0553347A4 - Hydraulic driving device of construction machinery. - Google Patents

Hydraulic driving device of construction machinery.

Info

Publication number
EP0553347A4
EP0553347A4 EP19900903215 EP90903215A EP0553347A4 EP 0553347 A4 EP0553347 A4 EP 0553347A4 EP 19900903215 EP19900903215 EP 19900903215 EP 90903215 A EP90903215 A EP 90903215A EP 0553347 A4 EP0553347 A4 EP 0553347A4
Authority
EP
European Patent Office
Prior art keywords
oil pressure
hydraulic driving
driving mechanism
construction machinery
driving device
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
EP19900903215
Other languages
German (de)
French (fr)
Other versions
EP0553347B1 (en
EP0553347A1 (en
Inventor
Yukio Moriya
Takeshi Kobayashi
Takumi Onoda
Fujitoshi Takamura
Toshio Yokoyama
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
Publication of EP0553347A4 publication Critical patent/EP0553347A4/en
Publication of EP0553347A1 publication Critical patent/EP0553347A1/en
Application granted granted Critical
Publication of EP0553347B1 publication Critical patent/EP0553347B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

This invention relates to a hydraulic driving device of a travelling machine or working machine in construction machinery such as a power shovel, a shovel bulldozer, a bulldozer, and so forth. The device includes a hydraulic driving mechanism actuated by oil pressure, a means for supplying the oil pressure to an oil pressure piping arrangement system for this hydraulic driving mechanism and a means for controlling this oil pressure supply means and lowering the oil pressure supply speed in the oil pressure piping arrangement system and based on the oil pressure supply in a predetermined zone after a dead zone in which the oil pressure rises. Accordingly, while the delay of the operation of the hydraulic driving mechanism is prevented, the shock at the start and stop can be prevented.
EP90903215A 1990-02-20 1990-02-20 Hydraulic driving device of construction machinery Expired - Lifetime EP0553347B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1990/000195 WO1991013218A1 (en) 1990-02-20 1990-02-20 Hydraulic driving device of construction machinery

Publications (3)

Publication Number Publication Date
EP0553347A4 true EP0553347A4 (en) 1993-03-02
EP0553347A1 EP0553347A1 (en) 1993-08-04
EP0553347B1 EP0553347B1 (en) 1997-04-16

Family

ID=13986369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90903215A Expired - Lifetime EP0553347B1 (en) 1990-02-20 1990-02-20 Hydraulic driving device of construction machinery

Country Status (3)

Country Link
EP (1) EP0553347B1 (en)
DE (1) DE69030507T2 (en)
WO (1) WO1991013218A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5578805A (en) * 1978-12-11 1980-06-13 Japan Steel Works Ltd:The Turning device by utilizing variable pump
JPS58213927A (en) * 1982-06-07 1983-12-13 Daikin Ind Ltd Construction machine such as power shovel
JPS62160331A (en) * 1986-01-08 1987-07-16 Hitachi Constr Mach Co Ltd Controller for engine and oil-pressure pump
JPH0686905B2 (en) * 1987-07-08 1994-11-02 株式会社神戸製鋼所 Turning control method for hydraulic work machine
JP2509311B2 (en) * 1988-10-25 1996-06-19 株式会社小松製作所 Work machine control method for construction machinery

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 013, no. 189 (M-821)8 May 1989 & JP-A-01 015 568 ( KOBE STEEL LTD. ) 19 January 1989 *
PATENT ABSTRACTS OF JAPAN vol. 014, no. 335 (M-1000)(4278) 19 January 1990 & JP-A-02 115 421 ( KOMATSU LTD. ) 27 February 1990 *
See also references of WO9113218A1 *

Also Published As

Publication number Publication date
DE69030507T2 (en) 1997-09-25
DE69030507D1 (en) 1997-05-22
EP0553347B1 (en) 1997-04-16
EP0553347A1 (en) 1993-08-04
WO1991013218A1 (en) 1991-09-05

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