EP2146009A1 - Aktuator für Baumaschinen - Google Patents

Aktuator für Baumaschinen Download PDF

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Publication number
EP2146009A1
EP2146009A1 EP09425292A EP09425292A EP2146009A1 EP 2146009 A1 EP2146009 A1 EP 2146009A1 EP 09425292 A EP09425292 A EP 09425292A EP 09425292 A EP09425292 A EP 09425292A EP 2146009 A1 EP2146009 A1 EP 2146009A1
Authority
EP
European Patent Office
Prior art keywords
piston
actuator
main arm
cylinder
chassis
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.)
Withdrawn
Application number
EP09425292A
Other languages
English (en)
French (fr)
Inventor
Marko Kraljic
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.)
OMT SpA
Original Assignee
OMT SpA
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 OMT SpA filed Critical OMT SpA
Publication of EP2146009A1 publication Critical patent/EP2146009A1/de
Withdrawn legal-status Critical Current

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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
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • 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
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E02F3/382—Connections to the frame; Supports for booms or arms
    • 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
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2271—Actuators and supports therefor and protection therefor

Definitions

  • the present invention relates to an actuator, particularly for construction site machines.
  • Earth-movers or lifting machines or hydraulic work vehicles usually comprising a chassis for supporting a cab and the motor drive, arranged on tracks or supported on wheels, are known presently among construction site machines.
  • These types of machine usually comprise at least one main arm, which is actuated by a first piston or by a pair of first pistons controlled by an adapted hydraulic circuit, the main arm being in turn pivoted to a forearm and being connected thereto by way of additional hydraulic pistons, such forearm being in turn connected to a bucket or shovel that is actuated by means of additional pistons, all of which are controlled by the same hydraulic circuit.
  • the aim of the present invention is to solve the noted technical problems, eliminating the drawbacks of the cited background art, by providing a device which, applied to construction site machines, makes it possible to use said machines while requiring a modest stress thereto, so as to improve their efficiency and make work easier for the operator.
  • an object of the invention is to provide a device that reduces the negative influence of the main arm on the operation of the machine.
  • Another object of the invention is to make it possible to contain the consumption of fuel in the machine to which it is applied.
  • Another object is to obtain a device that is structurally simple, has low manufacturing costs, can be provided by means of usual and known systems, and can be applied simply and rapidly to construction site machines of known type.
  • an actuator particularly for construction site machines such as earth-movers, lifting machines, hydraulic work vehicles, which comprise a chassis for supporting a motorized cab that is arranged rotatably on tracks or supported on wheels and is provided with at least one main arm actuated by at least one first piston or cylinder controlled by a hydraulic circuit, characterized in that it is constituted by at least one second piston or cylinder with an upward force, which is interposed between said chassis and said main arm and is connected to a separate actuation circuit.
  • the reference numeral 1 designates a construction site machine, such as an earth-mover, a lifting machine, or hydraulic work vehicles of the type comprising a chassis 2 for supporting a cab 3 and the motor drive and thus containing not only the engine but also tanks for the oil and piping for the supply of the hydraulic circuits and tracks 4a or wheels 4b on which the chassis 2 is arranged or supported.
  • a construction site machine such as an earth-mover, a lifting machine, or hydraulic work vehicles of the type comprising a chassis 2 for supporting a cab 3 and the motor drive and thus containing not only the engine but also tanks for the oil and piping for the supply of the hydraulic circuits and tracks 4a or wheels 4b on which the chassis 2 is arranged or supported.
  • a main arm 5 is associated with the chassis 2 and is actuated by a first hydraulic cylinder or piston or by a pair of first hydraulic cylinders or pistons 6a, 6b.
  • the main arm 5 is a monoblock arm or a positioning arm, as shown respectively in Figures 1 and 5 .
  • these machines of known type have a forearm 7 provided with a bucket or shovel 8, said machine also comprising usual and known components for feeding the fluid to the various hydraulic circuits of the main arm, of the forearm and of the bucket or shovel.
  • the reference numeral 9 designates an actuator, which is constituted by at least one second piston or cylinder 10 that is interposed between the chassis 2 and the main arm 5.
  • the second piston 10 has an upward force and is further interposed, in the illustrated embodiment, between the pair of first pistons 6a, 6b.
  • the second piston 10 is therefore arranged approximately according to an axis 11 that is central to the lower surface 12 of the main arm 5, and an adapted lug 13 for the anchoring of the upper end of the second piston 10 protrudes from said main arm.
  • Such second piston is controlled by a separate circuit 14 for its actuation, which consists of an adapted duct which is connected to a tank 15 or to a plurality of cylinders 16, both of which comprise a gas or a fluid, preferably nitrogen.
  • the operation of the invention is as follows: during work, when the user activates the main arm 5, the actuator 9 is activated simultaneously and independently, actuating the second piston 10, which by using a different actuation circuit 14 extends itself, with the primary function of reducing the influence of the main arm 5 and of what is connected thereto, canceling its burden on the operation of the machine, thus facilitating the hydraulic operation of said machine, which can thus be used with a reduced employment of power, so as to limit the stress on said machine, improving its efficiency and making work easier.
  • the invention has achieved the intended aim and objects, a device having been obtained which can be applied easily to existing construction site machines, such as excavators, loaders, lifters, and consists substantially in a new construction of the suspension, where a second cylinder 10 is added to the pair of existing first hydraulic cylinders 6a, 6b, with the primary function of reducing the influence of the main arm 5 on the operation of the machine.
  • the second cylinder 10 is mounted under the main arm 5 and with the ascending force imparted by the gas contained therein it acts by eliminating the force of gravity applied to the main arm and to what is applied thereto.
  • the cylinders 16 are connected to the second cylinder 10 with the separate actuation circuit 14, which comprises adapted ducts through which the gas passes, and therefore they assume the function of the accumulation system (tank) for maintaining the necessary pressure.
  • the materials used, as well as the contingent shapes and dimensions, may of course be any according to specific requirements.

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)
EP09425292A 2008-07-17 2009-07-17 Aktuator für Baumaschinen Withdrawn EP2146009A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HR20080358A HRPK20080358B3 (en) 2008-07-17 2008-07-17 Additional pneumatic cylinder on the working machinery

Publications (1)

Publication Number Publication Date
EP2146009A1 true EP2146009A1 (de) 2010-01-20

Family

ID=41152097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09425292A Withdrawn EP2146009A1 (de) 2008-07-17 2009-07-17 Aktuator für Baumaschinen

Country Status (2)

Country Link
EP (1) EP2146009A1 (de)
HR (1) HRPK20080358B3 (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011154396A1 (de) 2010-06-11 2011-12-15 Kiesel, Toni Verfahren zur ansteuerung eines hydraulisch bewegbaren arbeitselementes eines arbeitsgerätes sowie ein arbeitsgerät
US20120023920A1 (en) * 2010-07-27 2012-02-02 Peter Kloft Device for recovering energy
EP2455553A1 (de) * 2010-11-17 2012-05-23 Liebherr-Hydraulikbagger GmbH Arbeitsgerät
EP2455554A3 (de) * 2010-11-17 2013-04-03 Liebherr-Hydraulikbagger GmbH Arbeitsgerät
WO2014017958A1 (en) * 2012-07-26 2014-01-30 Volvo Construction Equipment Ab Balanced linkage
CN104005435A (zh) * 2014-06-06 2014-08-27 山东中川液压有限公司 一种高效节能环保油液混合动力挖掘机
CN104018531A (zh) * 2014-05-17 2014-09-03 王学义 一种用于装载机的举升支撑装置
CN104153408A (zh) * 2014-08-26 2014-11-19 广西大学 一种机械式双驱动电动挖掘机
CN104153407A (zh) * 2014-08-26 2014-11-19 广西大学 一种机械电锁式双驱动电动挖掘机
CN104314133A (zh) * 2014-11-04 2015-01-28 三一重机有限公司 一种lng-柴油双燃料液压挖掘机
CN105040758A (zh) * 2015-06-26 2015-11-11 吴爱群 一种园林用小型助力挖掘机
CN105862948A (zh) * 2016-05-20 2016-08-17 山河智能装备股份有限公司 一种挖掘机多油缸动臂举升结构
DE102015009111A1 (de) * 2015-07-19 2017-01-19 Johannes Burde Eine Vorrichtung um die hydraulischen Antriebe einer mobilen Arbeitsmaschine in ihrer Antriebsbewegung und -kraft zu unterstützen.
EP2455551B1 (de) * 2010-11-17 2020-06-03 Liebherr-Hydraulikbagger GmbH Arbeitsgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3521781A (en) * 1968-09-26 1970-07-28 Case Co J I Anti-rollback mechanism
AU443718B2 (en) * 1967-11-14 1973-12-12 Pacific Car And Foundry Company Boom assembly for front end loaders
US4354797A (en) * 1979-05-31 1982-10-19 Hitachi Construction Machinery Co., Ltd. Front loading hydraulic excavator
US6443196B1 (en) * 1999-10-04 2002-09-03 Tigercat Industries Inc. Hydraulic circuits for tree-harvesting knuckle booms
US6918247B1 (en) 2003-11-19 2005-07-19 Jack E Warner Assisted hydraulic system for moving a structural member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU443718B2 (en) * 1967-11-14 1973-12-12 Pacific Car And Foundry Company Boom assembly for front end loaders
US3521781A (en) * 1968-09-26 1970-07-28 Case Co J I Anti-rollback mechanism
US4354797A (en) * 1979-05-31 1982-10-19 Hitachi Construction Machinery Co., Ltd. Front loading hydraulic excavator
US6443196B1 (en) * 1999-10-04 2002-09-03 Tigercat Industries Inc. Hydraulic circuits for tree-harvesting knuckle booms
US6918247B1 (en) 2003-11-19 2005-07-19 Jack E Warner Assisted hydraulic system for moving a structural member

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8820061B2 (en) 2010-06-11 2014-09-02 Toni Kiesel Method for actuating a hydraulically movable working element of a working equipment, and a working equipment
WO2011154396A1 (de) 2010-06-11 2011-12-15 Kiesel, Toni Verfahren zur ansteuerung eines hydraulisch bewegbaren arbeitselementes eines arbeitsgerätes sowie ein arbeitsgerät
US9791015B2 (en) * 2010-07-27 2017-10-17 Hydac Technology Gmbh Device for recovering energy
US20120023920A1 (en) * 2010-07-27 2012-02-02 Peter Kloft Device for recovering energy
EP2455554A3 (de) * 2010-11-17 2013-04-03 Liebherr-Hydraulikbagger GmbH Arbeitsgerät
EP2455553A1 (de) * 2010-11-17 2012-05-23 Liebherr-Hydraulikbagger GmbH Arbeitsgerät
EP2455551B1 (de) * 2010-11-17 2020-06-03 Liebherr-Hydraulikbagger GmbH Arbeitsgerät
US9127736B2 (en) 2010-11-17 2015-09-08 Liebherr-Hydraulikbagger Gmbh Working device
US9163385B2 (en) 2010-11-17 2015-10-20 Liebherr-Hydraulikbagger Gmbh Working device
WO2014017958A1 (en) * 2012-07-26 2014-01-30 Volvo Construction Equipment Ab Balanced linkage
CN104018531A (zh) * 2014-05-17 2014-09-03 王学义 一种用于装载机的举升支撑装置
CN104018531B (zh) * 2014-05-17 2016-06-01 王学义 一种用于装载机的举升支撑装置
CN104005435A (zh) * 2014-06-06 2014-08-27 山东中川液压有限公司 一种高效节能环保油液混合动力挖掘机
CN104005435B (zh) * 2014-06-06 2016-12-07 山东中川液压有限公司 一种高效节能环保油液混合动力挖掘机
CN104153408B (zh) * 2014-08-26 2016-06-29 广西大学 一种机械式双驱动电动挖掘机
CN104153407A (zh) * 2014-08-26 2014-11-19 广西大学 一种机械电锁式双驱动电动挖掘机
CN104153408A (zh) * 2014-08-26 2014-11-19 广西大学 一种机械式双驱动电动挖掘机
CN104314133A (zh) * 2014-11-04 2015-01-28 三一重机有限公司 一种lng-柴油双燃料液压挖掘机
CN105040758A (zh) * 2015-06-26 2015-11-11 吴爱群 一种园林用小型助力挖掘机
DE102015009111A1 (de) * 2015-07-19 2017-01-19 Johannes Burde Eine Vorrichtung um die hydraulischen Antriebe einer mobilen Arbeitsmaschine in ihrer Antriebsbewegung und -kraft zu unterstützen.
CN105862948A (zh) * 2016-05-20 2016-08-17 山河智能装备股份有限公司 一种挖掘机多油缸动臂举升结构

Also Published As

Publication number Publication date
HRPK20080358B3 (en) 2011-07-31
HRP20080358A2 (hr) 2010-07-31

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