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JPS57130639A - Controller for front attitude of oil-pressure shovel, etc. - Google Patents

Controller for front attitude of oil-pressure shovel, etc.

Info

Publication number
JPS57130639A
JPS57130639A JP1502281A JP1502281A JPS57130639A JP S57130639 A JPS57130639 A JP S57130639A JP 1502281 A JP1502281 A JP 1502281A JP 1502281 A JP1502281 A JP 1502281A JP S57130639 A JPS57130639 A JP S57130639A
Authority
JP
Japan
Prior art keywords
signal
switch
boom
bucket
turned
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
JP1502281A
Other languages
Japanese (ja)
Other versions
JPH0250258B2 (en
Inventor
Kozo Ono
Yasuo Tanaka
Kunio Kashiwagi
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP1502281A priority Critical patent/JPS57130639A/en
Publication of JPS57130639A publication Critical patent/JPS57130639A/en
Publication of JPH0250258B2 publication Critical patent/JPH0250258B2/ja
Granted 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
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/432—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E02F3/432—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude
    • E02F3/433—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like for keeping the bucket in a predetermined position or attitude horizontal, e.g. self-levelling
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

PURPOSE:To automatically control both locus and angle of an bucket by using only one expensive flow control valve by providing an arithmetic unit to output a signal by which the flow control valve is controlled so as to keep the angle of the bucket at a given value to an oil-pressure circuit. CONSTITUTION:A switch 37 is turned OFF, switch valves 11 and 13 are manually operated, and a boom 2 and a bucket 4 are manually operated regardless of the signal X. When the switch 37 is turned ON, the switch valve 13 is set at a pressing position, and the arm 3 is moved upwards in a rocking manner, the signal X of a control mode selective signal generator 34 becomes the first state, the flow control valve 30 is controlled according to a control signal I3, the boom 2 is operated according to the signal I3, and the locus of the tip of the arm 3 is made horizontal. When the switch 37 is turned ON, the switch valve 11 is set to a boom-raising position, and the boom 2 is moved downwards, the signal X becomes the second state, the flow control valve 30 is opened in compliance with a control signal I4, and the bucket 4 is turned upwards at all times.
JP1502281A 1981-02-05 1981-02-05 Controller for front attitude of oil-pressure shovel, etc. Granted JPS57130639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1502281A JPS57130639A (en) 1981-02-05 1981-02-05 Controller for front attitude of oil-pressure shovel, etc.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1502281A JPS57130639A (en) 1981-02-05 1981-02-05 Controller for front attitude of oil-pressure shovel, etc.

Publications (2)

Publication Number Publication Date
JPS57130639A true JPS57130639A (en) 1982-08-13
JPH0250258B2 JPH0250258B2 (en) 1990-11-01

Family

ID=11877214

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1502281A Granted JPS57130639A (en) 1981-02-05 1981-02-05 Controller for front attitude of oil-pressure shovel, etc.

Country Status (1)

Country Link
JP (1) JPS57130639A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817574A1 (en) * 2000-12-04 2002-06-07 Faucheux Ind Soc FRONT LOADER FOR CARRIER
EP1889537A3 (en) * 2006-08-16 2008-08-27 John Deere Forestry Oy Control of a boom construction and a tool articulated thereto
US8862340B2 (en) 2012-12-20 2014-10-14 Caterpillar Forest Products, Inc. Linkage end effecter tracking mechanism for slopes

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817574A1 (en) * 2000-12-04 2002-06-07 Faucheux Ind Soc FRONT LOADER FOR CARRIER
EP1889537A3 (en) * 2006-08-16 2008-08-27 John Deere Forestry Oy Control of a boom construction and a tool articulated thereto
US8430621B2 (en) 2006-08-16 2013-04-30 John Deere Forestry Oy Control of a boom construction and a tool articulated thereto
US9345204B2 (en) 2006-08-16 2016-05-24 John Deere Forestry Oy Control of a boom construction and a tool articulated thereto
US8862340B2 (en) 2012-12-20 2014-10-14 Caterpillar Forest Products, Inc. Linkage end effecter tracking mechanism for slopes

Also Published As

Publication number Publication date
JPH0250258B2 (en) 1990-11-01

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