JPS55161129A - Excavator - Google Patents

Excavator

Info

Publication number
JPS55161129A
JPS55161129A JP6771779A JP6771779A JPS55161129A JP S55161129 A JPS55161129 A JP S55161129A JP 6771779 A JP6771779 A JP 6771779A JP 6771779 A JP6771779 A JP 6771779A JP S55161129 A JPS55161129 A JP S55161129A
Authority
JP
Japan
Prior art keywords
bucket
detector
control valve
boom
bucket cylinder
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
JP6771779A
Other languages
Japanese (ja)
Other versions
JPS6144169B2 (en
Inventor
Kiyonobu Hirose
Taizo Izumiyama
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 JP6771779A priority Critical patent/JPS55161129A/en
Priority to US06/154,278 priority patent/US4354797A/en
Priority to FR8012136A priority patent/FR2472633A1/en
Priority to DE19803020638 priority patent/DE3020638C2/en
Publication of JPS55161129A publication Critical patent/JPS55161129A/en
Publication of JPS6144169B2 publication Critical patent/JPS6144169B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E02F3/437—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant

Landscapes

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

Abstract

PURPOSE:To automatically keep a bucket in a predetermined pose and facilitate the operation of returning the bucket to the excavation starting position by providing a boom detector, bucket detector, control valve, and the like, in a shovel type excavator. CONSTITUTION:There are provided a boom detector 55, a bucket detector 56, and a control valve. The boom detector 55 consists of the first pressure generator 26 which generates a pilot pressure proportional to the displacement of the first piston 16. The bucket detector 56 consists of the second pressure generator 60 which generates a pilot pressure proportional to the displacement of the second piston. The control valve connects, at position C, not only a pressure source with the rod side of a bucket cylinder 8 rotating the bucket but also a tank with the bottom side of the bucket cylinder; at position D, the control valve connects not only the tank with the rod side of the bucket cylinder 8 but also the pressur source with the bottom side of the bucket cylinder.
JP6771779A 1979-05-31 1979-05-31 Excavator Granted JPS55161129A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6771779A JPS55161129A (en) 1979-05-31 1979-05-31 Excavator
US06/154,278 US4354797A (en) 1979-05-31 1980-05-29 Front loading hydraulic excavator
FR8012136A FR2472633A1 (en) 1979-05-31 1980-05-30 Compact excavator scoop movement control - involves two leads feeding different control pressures to valve unit holes
DE19803020638 DE3020638C2 (en) 1979-05-31 1980-05-30 Backhoe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6771779A JPS55161129A (en) 1979-05-31 1979-05-31 Excavator

Publications (2)

Publication Number Publication Date
JPS55161129A true JPS55161129A (en) 1980-12-15
JPS6144169B2 JPS6144169B2 (en) 1986-10-01

Family

ID=13352978

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6771779A Granted JPS55161129A (en) 1979-05-31 1979-05-31 Excavator

Country Status (1)

Country Link
JP (1) JPS55161129A (en)

Also Published As

Publication number Publication date
JPS6144169B2 (en) 1986-10-01

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