WO2004113622B1 - Device for a mechanical digger - Google Patents

Device for a mechanical digger

Info

Publication number
WO2004113622B1
WO2004113622B1 PCT/NO2004/000184 NO2004000184W WO2004113622B1 WO 2004113622 B1 WO2004113622 B1 WO 2004113622B1 NO 2004000184 W NO2004000184 W NO 2004000184W WO 2004113622 B1 WO2004113622 B1 WO 2004113622B1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
gas
lifting beam
receiving
working chambers
Prior art date
Application number
PCT/NO2004/000184
Other languages
French (fr)
Other versions
WO2004113622A1 (en
Inventor
Per Joergen Myhre
Original Assignee
Per Joergen Myhre
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 Per Joergen Myhre filed Critical Per Joergen Myhre
Priority to EP04748760A priority Critical patent/EP1639205A1/en
Publication of WO2004113622A1 publication Critical patent/WO2004113622A1/en
Publication of WO2004113622B1 publication Critical patent/WO2004113622B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
    • 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
    • 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
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • 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
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/625—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7055—Linear output members having more than two chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/88—Control measures for saving energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
  • Actuator (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

A device for a mechanical digger (10) is described, where the mechanical digger comprises a lower drive machinery (12) and an upper rotational part (14), where a lifting beam is connected to the upper part (14) comprising a vertically rotational lifting arm (18) which is articulately connected to an intermediate arm (20) to which a digging/lifting tool is articulately fitted, and a number of cylinders (24,26,28) arranged to drive the lifting beam. One or more of said cylinders for raising and lowering of the lifting beam comprises a multi­cylinder (24) for hydraulics and gas, where the gas part of the multi-cylinder (24) is arranged to provide a counter-force which approximately corresponds to the downward directed force vector of the lifting beam.

Claims

AMENDED CLAIMS[received by the International Bureau on 22 December 2004 (22.12.04); original claims 1-5 are replaced by amended claims 1-5]
1. Use of multi-cylinder (24) for hydraulics and gas, for operation of a lifting beam of a mechanical digger (10) , wherein the multi-cylinder comprises an active part for running the lifting beam and a passive part to provide a counter-force which corresponds to the weight of the lifting beam, in that the multi-cylinder (24) comprises one or more working chambers (2,3) for receiving and evacuating said hydraulic oil, for running of the lifting beam, and at least one gas-filled working chamber (1) to provide said counter-force.
2. Use in accordance with claim 1, wherein said at least one working chamber (1) for gas is connected to an accumulator or an expansion tank.
3. Use in accordance with claim 2, wherein said multi- cylinder (24) comprises three working chambers, with two working chambers (2,3) for receiving and evacuating hydraulic oil, and one working chamber (1) for receiving and evacuating gas.
4. Use in accordance with claim 2, wherein the multi- cylinder (24) comprises four working chambers, with one or more working chambers (2,3) for receiving and evacuating hydraulic oil, and one or more working chambers (1,3) for receiving and evacuating gas.
5. Use in accordance with one of the preceding claims, wherein one or more multi-cylinders (24) are arranged between a forward section on an upper part (14) of the mechanical digger and an inner section of the lifting arm
PCT/NO2004/000184 2003-06-23 2004-06-23 Device for a mechanical digger WO2004113622A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04748760A EP1639205A1 (en) 2003-06-23 2004-06-23 Device for a mechanical digger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20032876 2003-06-23
NO20032876A NO320025B1 (en) 2003-06-23 2003-06-23 Device at an excavator

Publications (2)

Publication Number Publication Date
WO2004113622A1 WO2004113622A1 (en) 2004-12-29
WO2004113622B1 true WO2004113622B1 (en) 2005-03-17

Family

ID=27730995

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2004/000184 WO2004113622A1 (en) 2003-06-23 2004-06-23 Device for a mechanical digger

Country Status (3)

Country Link
EP (1) EP1639205A1 (en)
NO (1) NO320025B1 (en)
WO (1) WO2004113622A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010032415A1 (en) * 2010-07-27 2012-02-02 Hydac Technology Gmbh Apparatus for recovering energy
DE102010051663A1 (en) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
DE102010051664A1 (en) 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
DE102010051651A1 (en) 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
DE102010051665A1 (en) * 2010-11-17 2012-05-24 Liebherr-Hydraulikbagger Gmbh implement
GB2576783B (en) * 2018-09-03 2021-01-06 Caterpillar Global Mining Llc Apparatus for operating a machine work tool
EP3983685A4 (en) * 2019-06-17 2023-07-05 Elmaco AS Cylinder, hydraulic system, construction machine and procedure

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2514051A1 (en) * 1981-10-05 1983-04-08 Komatsu Mfg Co Ltd MECHANICAL SHOVEL WITH HYDRAULIC CONTROL
AU4047900A (en) * 1999-04-06 2000-10-23 Edwin E. Downer Jr Energy conservation system for earth-moving loading machines
JP4565528B2 (en) * 2000-03-03 2010-10-20 パスカルエンジニアリング株式会社 Fluid pressure cylinder with pressure increasing function

Also Published As

Publication number Publication date
NO20032876D0 (en) 2003-06-23
WO2004113622A1 (en) 2004-12-29
EP1639205A1 (en) 2006-03-29
NO20032876L (en) 2004-12-24
NO320025B1 (en) 2005-10-10

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