US20030118432A1 - Method and apparatus for reinforcing a load bearing member - Google Patents

Method and apparatus for reinforcing a load bearing member Download PDF

Info

Publication number
US20030118432A1
US20030118432A1 US10/028,155 US2815501A US2003118432A1 US 20030118432 A1 US20030118432 A1 US 20030118432A1 US 2815501 A US2815501 A US 2815501A US 2003118432 A1 US2003118432 A1 US 2003118432A1
Authority
US
United States
Prior art keywords
load bearing
set forth
bearing arrangement
attached
reinforcing
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
US10/028,155
Other languages
English (en)
Inventor
Christy Lee
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.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
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 Caterpillar Inc filed Critical Caterpillar Inc
Priority to US10/028,155 priority Critical patent/US20030118432A1/en
Assigned to CATERPILLAR, INC. reassignment CATERPILLAR, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, CHRISTY L.
Priority to JP2003555002A priority patent/JP2005513312A/ja
Priority to PCT/US2002/038468 priority patent/WO2003054309A1/en
Priority to GB0408370A priority patent/GB2396600B/en
Priority to AU2002362034A priority patent/AU2002362034A1/en
Publication of US20030118432A1 publication Critical patent/US20030118432A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • E02F3/38—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs

Definitions

  • This invention relates to an apparatus for reinforcing a load bearing member and, more specifically, to such an apparatus and method thereof in which at least one failure-prone location on the load bearing member is identified and reinforced.
  • Load bearing members such as booms, sticks, crane booms and so forth typically must support loads which may produce a resultant load acting transversely across the member.
  • Improvements in manufacturing processes such as welding processes allow for an improvement in the ability of the member to withstand loads.
  • An example of such improvements would be an improvement in the quality of welds which decrease the extent of heat affected zones produced by the welding process.
  • These improvements in the manufacturing processes allow for use of thinner materials in creating these members resulting in possibly increased payloads and improved cycle times due to the decrease in weight of such structures.
  • a point may be reached where the thickness of the member may be insufficient in a certain location or locations to support a desired loading condition. In such cases, it may be desirous to bolster these specific areas so as to allow the member to withstand the needed loading condition without sacrificing the minimization in the reduction in the weight of such members.
  • a method for reinforcing a load bearing member for use with a work machine comprising the steps of simulating a loading condition on the member, determining at least one location where the member is prone to buckling based on the simulation step, and proving the member with at least one reinforcing structure at that location.
  • FIG. 1 is a side elevation view of an exemplary work machine embodying the principles of the present invention.
  • FIG. 2 is an isometric view of a member comprising a boom embodying the principals of the present invention.
  • FIG. 3 is an isometric view of a member comprising a stick embodying the principals of the present invention.
  • FIG. 4 is a cross-sectional view taken through section 4 - 4 in FIG. 2.
  • FIG. 5 is partial side view of the boom shown in FIG. 2.
  • FIG. 6 is an isometric view of a member comprising a boom showing exemplary results of a buckling analysis.
  • FIG. 1 shown in FIG. 1 is an exemplary work machine 100 incorporating the teachings of the present invention.
  • the work machine 100 comprises a platform 101 onto which is mounted a plurality of load bearing members 105 embodied herein by a first member or boom 106 and a second member or stick 107 .
  • the boom 106 is pivotally connected to the platform 101 and moveable relative thereto by a first movement means embodied herein by a pair of first hydraulic actuators 110 which may comprise an extensible and retractable hydraulic cylinders.
  • first end 111 of the stick 107 is pivotally coupled to the boom 106 via a suitable connector such as a pin 112 and is moveable relative to the boom 106 by a second movement means embodied herein by a second hydraulic actuator 114 which also may comprise an extensible and retractable hydraulic cylinder.
  • a second hydraulic actuator 114 which also may comprise an extensible and retractable hydraulic cylinder.
  • the work machine 100 shown herein is embodied by a barge unloader, however such a showing is exemplary only and it is contemplated that the teachings of the present invention may have wide applicability for work machines used to support loads such as, for example, backhoe loaders, excavators and so forth.
  • Attached adjacent the second end 115 of stick 107 is an attachment 119 for use in grasping and holding a load of material which may comprise debris, dirt, rock, goods or other material types.
  • the attachment 119 shown herein is embodied herein by a clamshell bucket although it is contemplated that such a showing is for purposes of illustration and not limitation and that other attachment types may also be used without deviating from the spirit of the present invention.
  • the attachment 119 may also include a third hydraulic actuator (not shown) for use in activating the attachment 119 .
  • the boom 106 comprises a pair of spaced apart side plates 200 each attached preferably by a robotic welding process to a top plate 201 and a bottom plate 202 .
  • the boom 106 includes a first end 205 comprising a pair of ears 206 wherein each ear 206 includes an aperture 209 for receipt of a pin (not shown) or other suitable device for pivotally coupling the boom 106 to the platform 101 .
  • the boom 106 also includes a second end 210 also having a pair of ears 213 each having an aperture 214 for receipt of pin 118 .
  • a tube 217 extends from each side plate 200 and is used to couple the first hydraulic actuators 110 to the boom 106 .
  • Coupling assembly 218 extend from the bottom plate 202 and are used to pivotably support the second hydraulic actuator 114 in a well known manner.
  • FIG. 2 Also shown in hidden detail in FIG. 2 is a reinforcing structure 221 used to reinforce each of the side plates 200 against failure.
  • a reinforcing structure 221 used to reinforce each of the side plates 200 against failure.
  • the stick 107 is shown also incorporating the teachings of the present invention.
  • the stick 107 also comprises a pair of spaced apart side plates 300 each attached, also preferably by a robotic welding process, to a top plate 301 and a bottom plate 302 .
  • the stick 107 includes the first end 111 sized to fit between the ears 213 of the second end 210 of the boom 106 .
  • the first end 111 further includes an aperture 306 for receipt of pin 111 thereby providing for the aforementioned pivotal attachment to the boom 106 .
  • the second end 115 of the stick 107 also includes an aperture 307 sized to receive pin 118 .
  • Coupling assembly 309 extend from the bottom plate 302 and is used to pivotably support the second hydraulic actuator 114 in a well known manner.
  • FIG. 3 Also shown in hidden detail in FIG. 3 are a plurality of reinforcing structures each denoted by the reference numeral 310 which are used to reinforce each of the side plates 300 against buckling at pre-determined buckling prone areas.
  • the specific details of the reinforcing structures 310 will also be explained in greater detail as this disclosure progresses, suffice to say for now the use of the reinforcing structures 310 of the present invention also allows for the use of thinner side plates 300 on the stick 107 while preventing buckling of the side plates 300 at pre-determined buckling prone areas when loads placed on the stick 107 reach or exceed a given amount.
  • the number of reinforcing structures 221 , 310 to be used is a matter of design selection and need not constitute any more than is necessary to achieve the needed performance, and by limiting the number of reinforcing structures 221 , 310 used the weight of the boom 106 and the stick 107 may be minimized.
  • the location and configuration of the reinforcing structures 221 , 310 will now be discussed. For purposes of brevity the following discussion will be limited to the reinforcing structure 221 for the boom 106 , however it is to be understood that the disclosure herein is equally applicable to the reinforcing structures 310 used for the stick 107 .
  • at least one reinforcing structure 221 is attached to an inner surfaces 400 of the side plates 200 by a suitable attachment method preferably a laser welding method.
  • each reinforcing structure 221 is exemplary only and it is contemplated that other attachment locations for the reinforcing structures 221 may be had such as, for example, the outer surface 401 of each of the side plates 200 .
  • each reinforcing structure 221 comprises a substantially straight member having a base portion 404 and a rib portion 405 extending from the base portion 404 .
  • the reinforcing structure 221 may comprise a metallic or other rigid material and has a length which is user-selected based on the failure analysis performed on at least one of the members 105 and to be discussed with reference to FIG. 6.
  • other geometry's for the reinforcing structure 221 may also be used with deviating from the spirit of the present invention such as, for example, a cylindrical or flat configuration.
  • each reinforcing structure 310 is shown in hidden detail attached to the side plate 300 in an exemplary orientation ⁇ relative to the boom longitudinal axis 500 .
  • each reinforcing structure 310 may be attached to the side plate 300 at a user-selected orientations or angles ⁇ relative the boom's longitudinal axis 500 which can vary between zero (0) degrees and ninety (90) degrees.
  • FIG. 6 Shown in FIG. 6 is an exemplary diagram of the results of a buckling analysis performed on, for example, the boom 106 .
  • the area denoted 600 protruding from the side plate 200 represents the location of the side plate 200 which is prone to buckling as based on a simulated load placed on the boom 106 .
  • software programs such as, for example, Nastran (TM) can be used in conjunction with a computing system (not shown) to model loading characteristics on the boom 106 and stick 107 and obtain the aforementioned information related to buckling prone areas.
  • the overall length of each reinforcing structure 221 , 310 as well as size of the respective base and rib portions 404 , 405 may be chosen without undue experimentation.
  • each reinforcing structure 221 , 310 may be located on the boom 106 , the stick 107 , or both so as to bolster those identified failure-prone areas 600 which may be prone to buckling when subject to loads meeting or exceeding a certain level.
  • the weight of the boom 106 and stick 107 may be kept to a minimum, thereby providing for increased payloads and reduced cycle times for a any given job.
  • Modeling programs such as Nastram (TM) which are typically used with computing systems may be used to identify potential areas of the boom 106 and stick 107 which may be subject to failure.
  • each reinforcing structure 221 , 310 may be optimized so as to minimize the weight of the boom 106 and stick 107 ; thereby increasing the potential payload of the work machine 100 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Jib Cranes (AREA)
US10/028,155 2001-12-20 2001-12-20 Method and apparatus for reinforcing a load bearing member Abandoned US20030118432A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US10/028,155 US20030118432A1 (en) 2001-12-20 2001-12-20 Method and apparatus for reinforcing a load bearing member
JP2003555002A JP2005513312A (ja) 2001-12-20 2002-12-03 負荷部材を強化する方法および装置
PCT/US2002/038468 WO2003054309A1 (en) 2001-12-20 2002-12-03 Method and apparatus for reinforcing a load bearing member
GB0408370A GB2396600B (en) 2001-12-20 2002-12-03 Method and apparatus for reinforcing a load bearing member
AU2002362034A AU2002362034A1 (en) 2001-12-20 2002-12-03 Method and apparatus for reinforcing a load bearing member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/028,155 US20030118432A1 (en) 2001-12-20 2001-12-20 Method and apparatus for reinforcing a load bearing member

Publications (1)

Publication Number Publication Date
US20030118432A1 true US20030118432A1 (en) 2003-06-26

Family

ID=21841872

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/028,155 Abandoned US20030118432A1 (en) 2001-12-20 2001-12-20 Method and apparatus for reinforcing a load bearing member

Country Status (5)

Country Link
US (1) US20030118432A1 (ja)
JP (1) JP2005513312A (ja)
AU (1) AU2002362034A1 (ja)
GB (1) GB2396600B (ja)
WO (1) WO2003054309A1 (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2141289A1 (en) * 2007-04-25 2010-01-06 Komatsu Ltd Work machine boom
USD739446S1 (en) 2011-07-08 2015-09-22 Alo Aktiebolag Front loader for a tractor
US20150336778A1 (en) * 2011-09-20 2015-11-26 Deere & Company Boom apparatus with nose body
US9290363B2 (en) 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
USD766342S1 (en) * 2014-06-23 2016-09-13 Deere & Company Frontloader
USD766343S1 (en) * 2015-05-20 2016-09-13 Deere & Company Front end final loader
USD768731S1 (en) * 2014-04-16 2016-10-11 Deere & Company Frontloader
USD769335S1 (en) * 2014-04-16 2016-10-18 Deere & Company Frontloader
USD821462S1 (en) * 2015-10-02 2018-06-26 Kubota Environmental Service Co., Ltd. Shell liner
USD823362S1 (en) * 2015-10-02 2018-07-17 Kubota Environmental Service Co., Ltd. Shell liners
US10494236B2 (en) * 2017-05-12 2019-12-03 Liebherr-Werk Ehingen Gmbh Telescopic boom and mobile crane
USD923062S1 (en) * 2020-02-20 2021-06-22 Hankuk Chain Industrial Co., Ltd. Front end loader of tractor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2610754A (en) * 1949-10-20 1952-09-16 Leo A Inskeep Dipper handle
US3992836A (en) * 1975-03-05 1976-11-23 Pradip Kanti Mitra Crane
PL197584A1 (pl) * 1977-04-22 1978-10-23 Urzadzen Mech Bumar Labendy Skrzynkowy ustroj nosny
DE4101582A1 (de) * 1991-01-21 1992-07-23 Univ Magdeburg Tech Krafteinleitungs-, kraftumlenkungs- und fuegestelle
DE19882546T1 (de) * 1997-07-15 2000-07-27 Komatsu Mfg Co Ltd Konstruktion für den Arbeitsmechanismus eines Löffelbaggers sowie Herstellverfahren hierfür

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100119344A1 (en) * 2007-04-25 2010-05-13 Komatsu Ltd. Work equipment boom
EP2141289A4 (en) * 2007-04-25 2011-04-27 Komatsu Mfg Co Ltd PULLER OF A WORK MACHINE
US8297906B2 (en) 2007-04-25 2012-10-30 Komatsu Ltd. Work equipment boom
EP2141289A1 (en) * 2007-04-25 2010-01-06 Komatsu Ltd Work machine boom
USD739446S1 (en) 2011-07-08 2015-09-22 Alo Aktiebolag Front loader for a tractor
US9290363B2 (en) 2011-07-21 2016-03-22 Manitowoc Crane Companies, Llc Tailor welded panel beam for construction machine and method of manufacturing
US9592999B2 (en) * 2011-09-20 2017-03-14 Deere & Company Boom apparatus with nose body
US20150336778A1 (en) * 2011-09-20 2015-11-26 Deere & Company Boom apparatus with nose body
USD768731S1 (en) * 2014-04-16 2016-10-11 Deere & Company Frontloader
USD769335S1 (en) * 2014-04-16 2016-10-18 Deere & Company Frontloader
USD766342S1 (en) * 2014-06-23 2016-09-13 Deere & Company Frontloader
USD766343S1 (en) * 2015-05-20 2016-09-13 Deere & Company Front end final loader
USD821462S1 (en) * 2015-10-02 2018-06-26 Kubota Environmental Service Co., Ltd. Shell liner
USD823362S1 (en) * 2015-10-02 2018-07-17 Kubota Environmental Service Co., Ltd. Shell liners
US10494236B2 (en) * 2017-05-12 2019-12-03 Liebherr-Werk Ehingen Gmbh Telescopic boom and mobile crane
USD923062S1 (en) * 2020-02-20 2021-06-22 Hankuk Chain Industrial Co., Ltd. Front end loader of tractor

Also Published As

Publication number Publication date
GB0408370D0 (en) 2004-05-19
AU2002362034A1 (en) 2003-07-09
WO2003054309A1 (en) 2003-07-03
JP2005513312A (ja) 2005-05-12
GB2396600B (en) 2005-12-21
GB2396600A (en) 2004-06-30

Similar Documents

Publication Publication Date Title
AU2002366786B2 (en) Load bearing member arrangement and method
US20030118432A1 (en) Method and apparatus for reinforcing a load bearing member
US3902295A (en) Boom construction and method for making same
US6757958B1 (en) Load handler with modular frame assembly
JP5592994B2 (ja) 建設機械用ブーム
CN105297800B (zh) 用于机器的机具系统的联动组件
US9376783B2 (en) Boom for linkage assembly of machine with fork reinforcement plate
JPH0434650B2 (ja)
EP0993529B1 (en) Box boom lift arm assembly
EP4025741B1 (en) Excavator bucket with an integrally cast hinge assembly and method of manufacturing the same
CN109477339B (zh) 具有重量优化的铰接桅杆的大型机械手
US20180029851A1 (en) Linkage assembly for machine
CN105297799B (zh) 用于机器的联动组件的斗杆
WO2021045951A1 (en) Integrally cast hinge assembly and method of manufacturing a machine bucket
US10815637B2 (en) Arm assembly
US20120230804A1 (en) Tilt Cylinder Support Structure
US9334624B2 (en) Articulated work machine
US20030035710A1 (en) Truss style stick or boom
US11866905B2 (en) Linkage for arm assembly with reduced weld fatigue
GB2545184A (en) Mounting block for hydraulic mining shovel
GB2401699A (en) A method of manufacturing a load bearing member and determining the effects of heat caused by welding
US20170241101A1 (en) Loader bucket
CN117836486A (zh) 用于挖掘机拇指的轭架组件
Trask et al. A 900 Ton Crawler Crane with 12’× 12’Main Boom Cross Section Disassembles for Truck Transport on the Interstate
JPH0119013B2 (ja)

Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR, INC., ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LEE, CHRISTY L.;REEL/FRAME:012416/0763

Effective date: 20011127

STCB Information on status: application discontinuation

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