JPS57130638A - Controller for bucket angle of loading and construction machinery - Google Patents

Controller for bucket angle of loading and construction machinery

Info

Publication number
JPS57130638A
JPS57130638A JP1502181A JP1502181A JPS57130638A JP S57130638 A JPS57130638 A JP S57130638A JP 1502181 A JP1502181 A JP 1502181A JP 1502181 A JP1502181 A JP 1502181A JP S57130638 A JPS57130638 A JP S57130638A
Authority
JP
Japan
Prior art keywords
bucket
flow control
control valve
oil
buckets
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
JP1502181A
Other languages
Japanese (ja)
Other versions
JPH0250257B2 (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 JP1502181A priority Critical patent/JPS57130638A/en
Publication of JPS57130638A publication Critical patent/JPS57130638A/en
Publication of JPH0250257B2 publication Critical patent/JPH0250257B2/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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/308—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working outwardly
    • 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)

Abstract

PURPOSE:To prevent the occurrence of accident due to the dropping of soil and sand contained in buckets without the need for greatly changing the conventional oil pressure circuit by using a system in which a flow control valve and a check valve are added to the oil pressure circuit and the angle of buckets is automatically kept at a given value. CONSTITUTION:Between the rod side oil pathway 25 and the bottom side oil pathway 26 of a bucket cylinder, a flow control valve 27 operating in response to signals from outside and a check valve 28 allowing the flow of oil from bottom side to rod side are provided. Signals alpha1, alpha2, and alpha3 from an attitude signal generator provided at the joints of a boom 2, an arm 3, and a bucket 4 are put in an arithmetical unit 31 and then its output signal I2 is outputted to control the flow control valve 27 through a switch 32, whereby directing upwards the opening of the bucket 4 at all times.
JP1502181A 1981-02-05 1981-02-05 Controller for bucket angle of loading and construction machinery Granted JPS57130638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1502181A JPS57130638A (en) 1981-02-05 1981-02-05 Controller for bucket angle of loading and construction machinery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1502181A JPS57130638A (en) 1981-02-05 1981-02-05 Controller for bucket angle of loading and construction machinery

Publications (2)

Publication Number Publication Date
JPS57130638A true JPS57130638A (en) 1982-08-13
JPH0250257B2 JPH0250257B2 (en) 1990-11-01

Family

ID=11877188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1502181A Granted JPS57130638A (en) 1981-02-05 1981-02-05 Controller for bucket angle of loading and construction machinery

Country Status (1)

Country Link
JP (1) JPS57130638A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195470A1 (en) * 2000-10-03 2002-04-10 NEW HOLLAND ITALIA S.p.A. Earth-moving machine
EP1211357A1 (en) * 2000-12-04 2002-06-05 Faucheux Industries Front-loading attachement for a carrier vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1195470A1 (en) * 2000-10-03 2002-04-10 NEW HOLLAND ITALIA S.p.A. Earth-moving machine
EP1211357A1 (en) * 2000-12-04 2002-06-05 Faucheux Industries Front-loading attachement for a carrier vehicle
FR2817574A1 (en) * 2000-12-04 2002-06-07 Faucheux Ind Soc FRONT LOADER FOR CARRIER

Also Published As

Publication number Publication date
JPH0250257B2 (en) 1990-11-01

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