EP0461258A4 - Control unit for upper swivel body of hydraulic excavator - Google Patents

Control unit for upper swivel body of hydraulic excavator

Info

Publication number
EP0461258A4
EP0461258A4 EP19900903220 EP90903220A EP0461258A4 EP 0461258 A4 EP0461258 A4 EP 0461258A4 EP 19900903220 EP19900903220 EP 19900903220 EP 90903220 A EP90903220 A EP 90903220A EP 0461258 A4 EP0461258 A4 EP 0461258A4
Authority
EP
European Patent Office
Prior art keywords
pressure
swivel body
upper swivel
controller
driving motor
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.)
Withdrawn
Application number
EP19900903220
Other languages
French (fr)
Other versions
EP0461258A1 (en
Inventor
Yukio Komatsu Osaka Plant 3-1-1 Ueno Moriya
Takumi Komatsu Osaka Plant 3-1-1 Ueno Onoda
Fugitoshi Komatsu Osaka Plant Takamura
Toshio Komatsu Osaka Plant 3-1-1 Ueno 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 EP0461258A1 publication Critical patent/EP0461258A1/en
Publication of EP0461258A4 publication Critical patent/EP0461258A4/en
Withdrawn legal-status Critical Current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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/123—Drives or control devices specially adapted therefor
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/10—Supports for movable superstructures mounted on travelling or walking gears or on other superstructures
    • E02F9/12—Slewing or traversing gears
    • E02F9/121—Turntables, i.e. structure rotatable about 360°
    • E02F9/128—Braking systems

Abstract

This invention relates to a control unit for an upper swivel body of a hydraulic excavator which is used in order to prevent an abrupt pressure rise in a hydraulic line and to make a smooth swivel control when the upper swivel body equipped with a driver's cabin and a working machine and having a large inertia is accelerated or decelerated. To this end, pressure control valves (10), (11) controlled together with proportional solenoid valves (8), (8a) by a controller (7) are connected to a discharge line and return line of a hydraulic pump (1) so as to control an input pressure and an output pressure of an upper swivel body driving motor (3) when the motor rotates. Particularly, one of the pressure control valves (10) controls and increases the driving pressure of the driving motor (3) in accordance with a speed increase signal outputted from the controller (7) and the other pressure control valve (11) controls and decrease the braking pressure of the driving motor (3) in accordance with a speed decrease signal outputted from the controller (7).
EP19900903220 1989-02-28 1990-02-16 Control unit for upper swivel body of hydraulic excavator Withdrawn EP0461258A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP46984/89 1989-02-28
JP4698489A JPH02225730A (en) 1989-02-28 1989-02-28 Controller of upper part swiveling body in hydraulic excavator

Publications (2)

Publication Number Publication Date
EP0461258A1 EP0461258A1 (en) 1991-12-18
EP0461258A4 true EP0461258A4 (en) 1993-03-31

Family

ID=12762482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900903220 Withdrawn EP0461258A4 (en) 1989-02-28 1990-02-16 Control unit for upper swivel body of hydraulic excavator

Country Status (3)

Country Link
EP (1) EP0461258A4 (en)
JP (1) JPH02225730A (en)
WO (1) WO1990010117A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR960023541A (en) * 1994-12-08 1996-07-20 안자키 사토루 Reverse Actuator of Hydraulic Actuator
US6052636A (en) * 1997-08-04 2000-04-18 Caterpillar Inc. Apparatus and method for positioning an excavator housing
DE69911674T2 (en) * 1998-03-11 2004-07-01 Poclain Hydraulics Industrie Valve device for a hydraulic motor for driving a mass of great inertia

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59126829A (en) * 1983-01-10 1984-07-21 Hitachi Constr Mach Co Ltd Oil pressure controller for oil-pressure shovel
JPH0663265B2 (en) * 1985-11-29 1994-08-22 株式会社小松製作所 Hydraulic circuit of construction machinery
JPH0431326Y2 (en) * 1986-04-30 1992-07-28

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO9010117A1 *

Also Published As

Publication number Publication date
JPH02225730A (en) 1990-09-07
EP0461258A1 (en) 1991-12-18
WO1990010117A1 (en) 1990-09-07

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Legal Events

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