JPH0250258B2 - - Google Patents

Info

Publication number
JPH0250258B2
JPH0250258B2 JP1502281A JP1502281A JPH0250258B2 JP H0250258 B2 JPH0250258 B2 JP H0250258B2 JP 1502281 A JP1502281 A JP 1502281A JP 1502281 A JP1502281 A JP 1502281A JP H0250258 B2 JPH0250258 B2 JP H0250258B2
Authority
JP
Japan
Prior art keywords
signal
control valve
boom
valve
arm
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.)
Expired
Application number
JP1502281A
Other languages
English (en)
Japanese (ja)
Other versions
JPS57130639A (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/ja
Publication of JPS57130639A publication Critical patent/JPS57130639A/ja
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)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
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 JPS57130639A (en) 1982-08-13
JPH0250258B2 true JPH0250258B2 (de) 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 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817574B1 (fr) * 2000-12-04 2003-10-10 Faucheux Ind Soc Dispositif chargeur frontal pour engin porteur
FI123932B (fi) 2006-08-16 2013-12-31 John Deere Forestry Oy Puomirakenteen ja siihen nivelletysti kiinnitetyn työkalun ohjaus
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
JPS57130639A (en) 1982-08-13

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