US20090223093A1 - Support Arm for a Work Machine - Google Patents

Support Arm for a Work Machine Download PDF

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Publication number
US20090223093A1
US20090223093A1 US12/278,828 US27882808A US2009223093A1 US 20090223093 A1 US20090223093 A1 US 20090223093A1 US 27882808 A US27882808 A US 27882808A US 2009223093 A1 US2009223093 A1 US 2009223093A1
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US
United States
Prior art keywords
support arm
plate
cut
shaped element
shaped
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.)
Abandoned
Application number
US12/278,828
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English (en)
Inventor
Bernhard Willaredt
Gerald Lechler
Ralf Schmeling
Holger Oertel
Birgit Ditz
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.)
CNH Industrial America LLC
Original Assignee
CNH Amercia LLC
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 CNH Amercia LLC filed Critical CNH Amercia LLC
Publication of US20090223093A1 publication Critical patent/US20090223093A1/en
Assigned to CNH AMERICA LLC reassignment CNH AMERICA LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CNH BAUMASCHINEN GMBH, DITZ, BIRGIT, LECHLER, GERALD, OERTEL, HOLGER, SCHMELING, RALF, WILLAREDT, BERNHARD
Abandoned 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
    • E02F3/30—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
    • E02F3/301—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 with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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

Definitions

  • the invention pertains to a support arm for a work machine, for example a jib or boom on the work equipment of a excavator, with at least one wall having at least one plate-shaped element.
  • Work machines both movable machines such as excavators, wheel loaders, tractors, telescopic handlers, or other such machines as well as stationary machines such as cranes have support arms of different types that, individually or in combination, bear or move a work tool, a support, or other components and that connect these components to the work machine.
  • These support arms of varying length and design are often connected via a hinge to the drives moving the arm and to the machine, the work tool, the support, or other components.
  • the support arms generally consist of a box-shaped cross-section that is formed by walls, for example upper and lower flanges, as well as by side walls.
  • the walls are usually a welded constructions built of homogeneous plates of different thicknesses, whereby their contour of the walls along their length are dimensioned appropriately for the stresses expected to be placed on the component.
  • a welded cross-section for backhoe and loading shovel tools for an excavator is provided in DE 102 57 041 B3 in which the side walls, which have a uniform wall thickness, are equipped with upper and lower profile-reinforced end sections that form the corner sections of the upper and lower flanges located between the end sections.
  • the end sections are formed by separate metal plates adapted to the particular contour of the tools that are connected by a weld to the corresponding side walls, which are thinner.
  • the side walls connected to the profile-reinforced end sections are equipped with saddle rests for mounting the cylinder locating points.
  • Such a cross-section is relatively complicated to manufacture due to the necessity of producing the additional profile-reinforced end sections.
  • the task of the invention is to produce a support arm of the type described that follows the component stresses to be expected to a high degree, has the lowest possible intrinsic mass, and can be manufactured with a minimum of effort.
  • This task is accomplished by the invention of a support arm of the type described at the beginning in that the at least one plate-shaped element, which is adapted to the component stresses to be expected, has at least one planar cut-out, whereby at least one cut-out is covered by a thin-walled cover element opposite the plate-shaped element.
  • the at least one wall is made of a single-piece plate-shaped element, but in an additional design it is possible for the at least one wall to be comprised of several plate-shaped elements that are welded together. It is preferable for the at least one plate-shaped element to have a uniform wall thickness. To enable ideal adaptation to the component stresses to be expected, it is advantageous to design the corresponding plate-shaped element with several cut-outs. The cut-outs can be designed according to the load curve to be expected.
  • a support arm with walls of the type described is suggested that is adapted to a high degree to the load curve expected for the component due to the cut-out(s) that can be designed accordingly.
  • the cut-outs are correspondingly intended for those areas of the component where low stresses are expected. They can be manufactured without any problem and in any shape desired in the plate-shaped element. Due to the planar cut-outs, the intrinsic mass of the support arm is relatively low.
  • the at least one cover element can be located on the outside or inside of the plate-shaped element, or located in the cut-out of the plate-shaped element itself.
  • the support arm has a box-shaped cross-section with several walls, whereby at least one wall has a plate-shaped cross-section manufactured in the manner described.
  • the support arm can be part of the work equipment of a work machine and serve to move and bear a work tool. On the other hand, support arm can also at least be used as a support or to carry other components.
  • the support arm can be the jib or boom of an excavator, whereby the box-shaped cross-section of the support arm has an upper flange, a lower flange, and side walls, and in which at least one flange and/or at least one side wall has a plate-shaped element of the type described.
  • the support arm can be located on the upper carriage or the lower carriage of the excavator.
  • the upper and the lower flanges are located between the side walls of the support arm.
  • this design is also advantageous to integrate saddle bearings for cylinders and linkages into the side walls.
  • FIG. 1 A general arrangement drawing of a work machine in the form of an excavator
  • FIG. 2 Perspective diagram of a support arm designed according to the invention
  • FIG. 1 shows an example of a work machine in the form of a machine generally referred to as an excavator and labeled here with 1 .
  • the following description of the design of a support arm according to the invention can be realized in general for any type of mobile or stationary work machine; excavator 1 shown in FIG. 1 is only an example of such a machine.
  • Excavator 1 has one lower carriage 2 and one upper carriage 3 , and is equipped with a work tool in the form of a shovel 4 .
  • This shovel 4 is connected by work equipment consisting of several support arms 5 to excavator 1 , and in particular to the upper carriage 3 of the same excavator.
  • Other support arms can also be connected to the lower carriage 2 , of course, but this is not shown in detail in the drawing.
  • the individual support arms 5 of the work equipment of the excavator are connected by pin supports 6 to each other and to the hydraulic cylinders 7 moving the arms as well as to the upper carriage 3 and the shovel 4 .
  • the hydraulic cylinder 7 By adjusting the hydraulic cylinder 7 , the support arms 5 , and therefore the work tool such as shovel 4 shown in the example, can be brought to the desired working position.
  • the essential item is now the design of the support arms 5 that are shown in FIGS. 2 to 5 .
  • Each support arm 5 in this sample design consists of a box-shaped cross-section with one upper flange 8 , a lower flange 9 and two side walls 10 connected to the flanges 8 , 9 . These side walls 10 are dimensioned appropriately along the length of their outer contour to handle the expected component stresses.
  • the particular side wall 10 consists of a single plate-shaped element 11 of uniform wall thickness, preferably a thick metal plate, that has several planar cut-outs 12 .
  • These cut-outs 12 are designed differently in terms of their shape so that their shape is adapted to the component stresses to be expected.
  • the corresponding side wall 10 is preferably made of a single-piece plate-shaped element 11 , but the side wall 10 can be divided into several pieces (with the same wall thickness) for handling reasons if the components are too long, but is not desirable due to adaptation to the component stresses.
  • the support arm 5 shown in FIG. 2 is only one example; the shapes of the support arms 5 are naturally different depending on the actual function of the particular support arm (see also the different designs of the support arms 5 in FIG. 1 ). It is essential though that the walls are made of at least one plate-shaped element 11 with a uniform wall thickness and with at least one cut-out 12 , of which at least one cut-out is closed off by a thin-walled covering plate 14 ( FIG. 3 to 5 ) with an opposing plate-shaped element 11 . In contrast to the design shown in FIG. 2 , instead of the side walls 10 , the flanges 8 , 9 can also or only consists of plate-shaped elements 11 with at least one cut-out 12 and at least one thin-walled cover plate 14 . In general, it is also possible for only one side wall 10 or only one flange 8 , 9 to consist of at least one plate-shaped element 11 with at least one cut-out 12 and at least one thin-walled cover plate.
  • cover element 14 preferably consists of a thin-walled plate opposite the plate-shaped element 11 , and its outer contour can match the contour of the corresponding cut-outs 12 and is preferably connected circumferentially around the edge of the cut-outs 12 , for example by welding. In doing so, the cover element 14 can be located and connected to the outside ( FIG. 3 ), inside ( FIG. 4 ), or even in the contour of the cut-out ( FIG. 5 ) on the plate-shaped element 11 .
  • cover element 14 can be equipped with a cover element 14 , but at least one must be equipped with a cover element 14 .
  • cover elements 14 made of thin-walled plating only contribute minimally to the load bearing capacity of the support arm 5 . They can be manufactured automatically, economically, and without complicated post-welding work by connected them to the plate-shaped element 11 using thin, closed welding seams.
  • a support arm 5 according to the invention can not only be used as part of the working equipment of an excavator, but in general for any support arm of any type of work machine. These support arms can be connected to any part of the machine and can carry work tools as well as supports or other components even when these are not shown in the drawings. Additional designs according to the invention can also form support arms with walls with plate-shaped elements of the type described but without a box-shaped cross-section.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)
  • Body Structure For Vehicles (AREA)
  • Jib Cranes (AREA)
US12/278,828 2006-02-09 2006-12-16 Support Arm for a Work Machine Abandoned US20090223093A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102006005892.5 2006-02-09
DE102006005892A DE102006005892A1 (de) 2006-02-09 2006-02-09 Tragarm für eine Arbeitsmaschine
PCT/EP2006/012150 WO2007090452A1 (de) 2006-02-09 2006-12-16 Tragarm für eine arbeitsmaschine

Publications (1)

Publication Number Publication Date
US20090223093A1 true US20090223093A1 (en) 2009-09-10

Family

ID=37814186

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/278,828 Abandoned US20090223093A1 (en) 2006-02-09 2006-12-16 Support Arm for a Work Machine

Country Status (5)

Country Link
US (1) US20090223093A1 (de)
EP (1) EP1984574B1 (de)
JP (1) JP5014354B2 (de)
DE (1) DE102006005892A1 (de)
WO (1) WO2007090452A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130071216A1 (en) * 2011-09-20 2013-03-21 Steven J. Ditzler Exoskeleton Boom Structure
US20130142607A1 (en) * 2011-09-20 2013-06-06 Steven J. Ditzler Boom apparatus with sandwiched knuckle body
US20150090850A1 (en) * 2012-02-14 2015-04-02 Cifa Spa Segment of an articulated arm and articulated arm comprising said segment
US9290363B2 (en) 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
US20170071140A1 (en) * 2015-09-10 2017-03-16 Komatsu Ltd. Work vehicle
WO2018011271A1 (de) * 2016-07-12 2018-01-18 Schwing Gmbh GROßMANIPULATOR MIT GEWICHTSOPTIMIERTEM KNICKMAST
US20200102194A1 (en) * 2017-05-31 2020-04-02 Joachim Mayer Structural frame for a crane and similar machines, and crane comprising such a structural frame

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202010003617U1 (de) * 2009-06-19 2010-10-28 Liebherr-Hydraulikbagger Gmbh Baggerstiel
JP5314625B2 (ja) * 2010-03-08 2013-10-16 日立建機株式会社 建設機械用作業腕
US20140056677A1 (en) * 2011-04-20 2014-02-27 Hitachi Construction Machinery Co., Ltd. Boom for construction machine
CN102587669B (zh) * 2012-03-21 2015-02-18 中联重科股份有限公司 一种臂架及泵车
GB2557934B (en) 2016-12-16 2021-10-06 Bamford Excavators Ltd Arm assembly
JP6917022B2 (ja) * 2017-01-31 2021-08-11 株式会社タグチ工業 建設機械のアーム

Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US790478A (en) * 1905-01-28 1905-05-23 Vulcan Iron Works Company Boom for excavators.
US1688664A (en) * 1926-08-18 1928-10-23 Commw Steel Dipper handle
US1974458A (en) * 1932-10-19 1934-09-25 Gen Steel Castings Corp Dipper handle
US2048561A (en) * 1936-07-21 Dipper handle fob dredges
US2446410A (en) * 1943-11-27 1948-08-03 Kibbey W Couse Combination pry-and-boom structure
US3055459A (en) * 1956-01-23 1962-09-25 Los Altos Engineering Co Lifting equipment
US3283464A (en) * 1960-05-10 1966-11-08 Litzka Franz Honeycomb girders and method for making same
US3493133A (en) * 1967-11-15 1970-02-03 Hydraulic Machinery Co Inc Dipstick assembly
US3572528A (en) * 1969-05-14 1971-03-30 Int Harvester Co Uniform stress cantilever beam
US3722864A (en) * 1971-12-13 1973-03-27 Caterpillar Tractor Co Composite structural member
US3890757A (en) * 1974-02-28 1975-06-24 Case Co J I Boom members having stiffener elements for crane boom constructions
US3902295A (en) * 1974-05-28 1975-09-02 Caterpillar Tractor Co Boom construction and method for making same
US4003168A (en) * 1975-06-27 1977-01-18 Walter Kidde & Company, Inc. Crane boom of trapezoidal boom sections having reinforcing rings
US4016688A (en) * 1975-05-27 1977-04-12 Fmc Corporation Extensible crane boom structure
US4111320A (en) * 1977-03-23 1978-09-05 The Warner & Swasey Company Material handling apparatus having means for connecting material handling tool with a boom
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
US4337601A (en) * 1980-04-24 1982-07-06 Harnischfeger Corporation High-strength light-weight boom section for telescopic crane boom
US5176491A (en) * 1991-06-18 1993-01-05 Case Corporation Overcenter backhoe apparatus
US5595471A (en) * 1994-11-28 1997-01-21 Caterpillar Inc. Linkage arrangement
US6106217A (en) * 1998-08-14 2000-08-22 Caterpillar Inc. Lift arm arrangement of a construction machine
US6837446B1 (en) * 2003-01-16 2005-01-04 Sprayer Specialties, Inc. Unitary boom structure
US20060021264A1 (en) * 2002-12-06 2006-02-02 Terex Germany Gmbh & Co. Kg Profile for fitting a digger with a hoe bucket or loading shovel and method for production thereof
US20080187427A1 (en) * 2000-08-17 2008-08-07 Industrial Origami, Inc. Load-bearing three-dimensional structure
US20080292443A1 (en) * 2004-07-15 2008-11-27 Tetsuro Nose Boom and Arm Member of Construction Machine Excellent in Weld Zone Fatigue Strength and Method of Improvement of Its Fatigue Strength

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3109137B2 (ja) * 1991-06-26 2000-11-13 東レ株式会社 芳香族ポリエステル組成物
JPH06220884A (ja) * 1993-01-21 1994-08-09 Yanmar Diesel Engine Co Ltd バックホーのブーム構造
JP3691750B2 (ja) * 2000-11-13 2005-09-07 株式会社クボタ 旋回作業機

Patent Citations (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2048561A (en) * 1936-07-21 Dipper handle fob dredges
US790478A (en) * 1905-01-28 1905-05-23 Vulcan Iron Works Company Boom for excavators.
US1688664A (en) * 1926-08-18 1928-10-23 Commw Steel Dipper handle
US1974458A (en) * 1932-10-19 1934-09-25 Gen Steel Castings Corp Dipper handle
US2446410A (en) * 1943-11-27 1948-08-03 Kibbey W Couse Combination pry-and-boom structure
US3055459A (en) * 1956-01-23 1962-09-25 Los Altos Engineering Co Lifting equipment
US3283464A (en) * 1960-05-10 1966-11-08 Litzka Franz Honeycomb girders and method for making same
US3493133A (en) * 1967-11-15 1970-02-03 Hydraulic Machinery Co Inc Dipstick assembly
US3572528A (en) * 1969-05-14 1971-03-30 Int Harvester Co Uniform stress cantilever beam
US3722864A (en) * 1971-12-13 1973-03-27 Caterpillar Tractor Co Composite structural member
US3890757A (en) * 1974-02-28 1975-06-24 Case Co J I Boom members having stiffener elements for crane boom constructions
US3902295A (en) * 1974-05-28 1975-09-02 Caterpillar Tractor Co Boom construction and method for making same
US4016688A (en) * 1975-05-27 1977-04-12 Fmc Corporation Extensible crane boom structure
US4003168A (en) * 1975-06-27 1977-01-18 Walter Kidde & Company, Inc. Crane boom of trapezoidal boom sections having reinforcing rings
US4147263A (en) * 1977-01-06 1979-04-03 Lull Engineering Company, Inc. High lift loader with extended transfer
US4111320A (en) * 1977-03-23 1978-09-05 The Warner & Swasey Company Material handling apparatus having means for connecting material handling tool with a boom
US4337601A (en) * 1980-04-24 1982-07-06 Harnischfeger Corporation High-strength light-weight boom section for telescopic crane boom
US5176491A (en) * 1991-06-18 1993-01-05 Case Corporation Overcenter backhoe apparatus
US5595471A (en) * 1994-11-28 1997-01-21 Caterpillar Inc. Linkage arrangement
US6106217A (en) * 1998-08-14 2000-08-22 Caterpillar Inc. Lift arm arrangement of a construction machine
US20080187427A1 (en) * 2000-08-17 2008-08-07 Industrial Origami, Inc. Load-bearing three-dimensional structure
US20060021264A1 (en) * 2002-12-06 2006-02-02 Terex Germany Gmbh & Co. Kg Profile for fitting a digger with a hoe bucket or loading shovel and method for production thereof
US6837446B1 (en) * 2003-01-16 2005-01-04 Sprayer Specialties, Inc. Unitary boom structure
US20080292443A1 (en) * 2004-07-15 2008-11-27 Tetsuro Nose Boom and Arm Member of Construction Machine Excellent in Weld Zone Fatigue Strength and Method of Improvement of Its Fatigue Strength

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9290363B2 (en) 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
US20130142607A1 (en) * 2011-09-20 2013-06-06 Steven J. Ditzler Boom apparatus with sandwiched knuckle body
US9121163B2 (en) * 2011-09-20 2015-09-01 Deere & Company Exoskeleton boom structure
US9200424B2 (en) * 2011-09-20 2015-12-01 Deere & Company Boom apparatus with sandwiched knuckle body
US20130071216A1 (en) * 2011-09-20 2013-03-21 Steven J. Ditzler Exoskeleton Boom Structure
US9822535B2 (en) * 2012-02-14 2017-11-21 Cifa Spa Segment of an articulated arm and articulated arm comprising said segment
US20150090850A1 (en) * 2012-02-14 2015-04-02 Cifa Spa Segment of an articulated arm and articulated arm comprising said segment
US20170071140A1 (en) * 2015-09-10 2017-03-16 Komatsu Ltd. Work vehicle
US10362738B2 (en) * 2015-09-10 2019-07-30 Komatsu Ltd. Work vehicle
WO2018011271A1 (de) * 2016-07-12 2018-01-18 Schwing Gmbh GROßMANIPULATOR MIT GEWICHTSOPTIMIERTEM KNICKMAST
CN109477339A (zh) * 2016-07-12 2019-03-15 德国施维英有限公司 具有重量优化的铰接桅杆的大型机械手
EP3485108B1 (de) 2016-07-12 2020-05-27 Schwing GmbH Grossmanipulator mit gewichtsoptimiertem knickmast
US20200102194A1 (en) * 2017-05-31 2020-04-02 Joachim Mayer Structural frame for a crane and similar machines, and crane comprising such a structural frame

Also Published As

Publication number Publication date
DE102006005892A1 (de) 2007-08-23
JP2009526148A (ja) 2009-07-16
WO2007090452A1 (de) 2007-08-16
EP1984574A1 (de) 2008-10-29
JP5014354B2 (ja) 2012-08-29
EP1984574B1 (de) 2016-03-23

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Legal Events

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AS Assignment

Owner name: CNH AMERICA LLC, PENNSYLVANIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WILLAREDT, BERNHARD;CNH BAUMASCHINEN GMBH;LECHLER, GERALD;AND OTHERS;REEL/FRAME:023333/0836

Effective date: 20090216

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION