US3421236A - Linkage for an ejector type bucket loader - Google Patents

Linkage for an ejector type bucket loader Download PDF

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Publication number
US3421236A
US3421236A US648145A US3421236DA US3421236A US 3421236 A US3421236 A US 3421236A US 648145 A US648145 A US 648145A US 3421236D A US3421236D A US 3421236DA US 3421236 A US3421236 A US 3421236A
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US
United States
Prior art keywords
bucket
ejector
tilt linkage
lever
linkage
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.)
Expired - Lifetime
Application number
US648145A
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English (en)
Inventor
Edward J Moyer
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 Tractor Co
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 Tractor Co filed Critical Caterpillar Tractor Co
Application granted granted Critical
Publication of US3421236A publication Critical patent/US3421236A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E02F3/407—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with ejecting or other unloading device

Definitions

  • An improvement in tractor loaders having an ejector type bucket, lift arms for raising and lowering the bucket, and tilt linkage for controlling forward and rearward tilting of the bucket.
  • An ejector link extends from the bucket ejector plate to a pivotal connection with the tilt linkage by means of a tilt linkage lever and an ejector lever.
  • the tilt linkage and ejector levers each have contacting surfaces which radially extend from their common pivot connection and pivot into positive contacting relation to subsequetnly pivot the ejector plate forwardly according to operation of the tilt linkage.
  • the present invention relates generally to bucket loaders and more particularly to a tractor loader having an ejector type bucket wherein the ejector plate is controlled by the tilt linkage associated with the bucket.
  • Typical tractor loaders of a type having an ejector with the primary purpose of positively unloading material from the bucket commonly have a pair of lift arms and a tilt linkage for controlling the bucket while the ejector is controlled by a separate hydraulic jack within the bucket assembly.
  • a separate hydraulic jack for controlling the ejector undesirably increases the weight of the bucket assembly and further places additional manipulative duties on the loader operator.
  • the present invention provides an improved ejector control in tractor loaders having an ejector type bucket, lift arms for raising and lowering the bucket, and a tilt linkage for controlling forward and rearward tilting of the bucket.
  • the bucket includes a pivotal ejector plate which forms the rear Wall of the bucket.
  • a link element is connected to the ejector plate and extends from the ejector plate toward a link actuating portion of the tilt linkage.
  • the ejector plate is moved forwardly in the bucket by the ejector link according to being positive actuating contact in the link actuating portion of the tilt linkage only after an initial portion of the forward tilting of the bucket by the tilt linkage.
  • FIG. 1 is a partial side view in elevation of a tractor loader with its bucket in a loading position
  • a typical tractor loader has a tractor 11 and a bucket assembly 12 which is pivotally connected to the tractor by a pair of lift arms, one of which is indicated at 13, for raising and lowering the bucket.
  • the attitude of the bucket on the lift arm is controlled by a tilt linkage on either side of the tractor, one such tilt linkage being indicated at 14.
  • the bucket assembly has a floor portion 16 with a cutting blade 17 along its forward edge and an arcuate interior floor surface 18.
  • the bucket floor and a pair of bucket sidewalls, one of which is indicated at 19, are connected to a pair of generally vertical bucket support members located at the rear and to either side of the bucket, one such support member being indicated at 21.
  • a cross beam 22 is connected across the tops of the support members.
  • Each of the lift arms 13 is pivotally connected to one of the bucket support members at a pivot connection 23 and extends rearwardly to a pivot connection 24 with the tractor.
  • a hydraulic jack 26 is pivotally connected between the tractor and each of the lift arms for operating the lift arms to raise and lower the bucket.
  • the tilt linkage on either side of the tractor comprises a first member 27 which is pivotally connected to one of the bucket support members at a pivot connection 28 and extends rearwardly therefrom.
  • a second elongated member 29 is connected to a hydraulic jack 31 by means of a bellcrank member 32 and extends forwardly therefrom.
  • the bellcrank member 32 has a central pivot point 33 which is connected to the hydraulic jack rod and two end pivot points 34 and 36 which are respectively con nected to the tractor adjacent its pivot connection 24 with one of the lift arms and the rearward end of the sec-0nd element 29 to provide for some automatic tilting of the bucket according to the movement of the lift arms to raise and lower the bucket.
  • the rearward end of the first tilt linkage element 27 and the forward end of the second tilt linkage element 29 are pivotally connected at respective points 37 and 38 to a tilt linkage lever 39 which is also pivotally connected to the lift arm 13 generally midway along its length at pivot point 41.
  • the bucket 12 has an ejector plate 42 which is arcuately shaped, forms the rear wall of the bucket assembly 12 and is pivotally connected to the bucket support members at the top of the bucket assembly by pivot connections 43.
  • the ejector plate may pivot forwardly from its position at the rear of the bucket with its lower edge 44 sweeping along the arcuate floor surface 18 toward the cutting edge 17.
  • an ejector link 46 is connected to either side of the ejector plate generally adjacent one of the bucket support members at a pivot connection 47.
  • Each ejector link extends rearwardly to a pivot connection 48 with an ejector lever 49.
  • a rearward portion of the ejector lever has a pivot connection 51 with a portion of the tilt linkage lever 39 which is remote from the pivot connection of the tilt linkage lever with the lift arm 13.
  • a generally upward facing contact surface is defined at the upper extremity 52 of the tilt linkage lever 39 as a radial projection from the pivot connection 51 between the tilt linkage lever 39 and the ejector lever 49.
  • the ejection lever 49 has a generally rearward facing contact surface 53 which also radially projects from the pivot point 51. It is readily apparent by comparison of FIG. 1 with subsequent figures, particularly FIGS. 3 and 4, that as the tilt linkage lever 3-9 is forwardly pivoted about its pivot point 41 on the lift arm during forward tilting of the bucket, the angular opening between the contacting surfaces 52 and 53 will be closed and that after this initial forward tilting of the bucket, the tilt linkage lever 39, the ejector lever 49 and the ejector link 46 will form a continuous lever in effect which pivots the ejector plate forwardly according to subsequent forward tilting of the bucket by the tilt linkage.
  • Each ejector lever 49 also has a stop 54 for contacting a rearward extension 56 of the ejector link 46 to limit downward pivoting between the ejector lever 49 and the ejector link 46 as illustrated in FIGS. 1 and 2.
  • each pivot connection 48 between one of the ejector levers 49 and one of the ejector links 46 projects inwardly above the first tilt linkage member 27 and preferably has a bushing 50 thereon (see FIG. 4) to act as a second stop to contact the forward member 27 and limit the forward pivoting of the ejector plate.
  • the geometry of the tilt linkage and the positions of the stops are selected to provide for proper positioning of the bucket and the ejector plate during the hereinbelow descirbed modes of operation.
  • the function of the second stop 50 may also be seen from FIG. 4. As it comes in contact with the forward tilt linkage member 27, it prevents outward swinging of the ejector plate from the bucket to prevent it from impinging or becoming entangled with a structure forward of the bucket during dumping.
  • a tractor mounted loader having a bucket, lift arms pivotally connected to the bucket for raising and lowering the bucket, tilt linkage connected to the bucket for tilting the bucket forwardly and rearwandly and an ejector plate which forms the rear wall of the bucket and is pivotally connected to the bucket to permit forward and rearward pivoting of the ejector plate, the improvement comprising:
  • a link connected to the ejector plate for controlling the forward and rearward positioning of the ejector plate in the bucket and an ejector lever joined to the link and pivoted to a lever portion of the tilt linkage, the ejector plate being movable forwardly through the bucket by the link according to positive interaction between the ejector lever and tilt linkage lever after initial forward tilting of the bucket by the tilt linkage.
  • one of said levers is a tilt linkage lever which is also pivotally connected to a midportion of the lift arm and a member of the tilt linkage extends from a pivotal connection with the bucket to a pivotal connection with said tilt linkage lever, said pivotal connection of said member with the tilt linkage lever being interposed on the tilt linkage lever between its respective pivotal connections with the lift arm and said ejector link.
  • a bucket loader disposed on a tractor and having:
  • a bucket with a floor having a substantially straight outside surface and an arcuate inside surface, an ejector plate forming the rear wall of the bucket and being pivotally connected to the bucket to permit forward and rearward pivoting of the ejector pate such that an edge of the plate sweeps along the arcuate surface of the bucket floor;
  • a pair of lift arms pivotally connected to the bucket and extending rearwardly to the tractor, said lift arms operable by hydraulic jacks for raising and lowering the bucket;
  • tilt linkage operable by a pair of hydraulic jacks for forwardly and rearwardly tilting said bucket about its pivot connections with the lift arms, said tilt linkage having a first pair of members, each operably connected to one of the pair of jacks, each of said first members pivotally connected to a lever which is also pivotally connected to one of said lift arms and a second pair of members each pivotally connected between one of said tilt linkage levers and said bucket, each of said levers having an ejector lever pivot connection remotely disposed from its pivot connection with one of said lift arms and an upper contacting edge radially projecting generally rearwardly from said ejector lever pivot connection; and
  • each of said ejector levers having a rearward contacting 3,349,934 10/ 19 67 Moyer et a1.
  • said ejector lever contacting surfaces being contacted by said contacting surfaces of said tilt linkage levers after initial forward tilting of said bucket to result in subsequent forward pivoting of said ejector plate according to forward tilting operation of said pair of tilt linkage jacks, said ejector levers comprising stops for limiting pivotal separation of each adjacent pair of said contacting surfaces on one of said ejector levers and one of said tilt linkage levers.

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  • 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)
  • Forklifts And Lifting Vehicles (AREA)
  • Casting Devices For Molds (AREA)
US648145A 1967-06-22 1967-06-22 Linkage for an ejector type bucket loader Expired - Lifetime US3421236A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US64814567A 1967-06-22 1967-06-22

Publications (1)

Publication Number Publication Date
US3421236A true US3421236A (en) 1969-01-14

Family

ID=24599618

Family Applications (1)

Application Number Title Priority Date Filing Date
US648145A Expired - Lifetime US3421236A (en) 1967-06-22 1967-06-22 Linkage for an ejector type bucket loader

Country Status (8)

Country Link
US (1) US3421236A (en:Method)
BE (1) BE716458A (en:Method)
CH (1) CH474634A (en:Method)
DE (1) DE1756643A1 (en:Method)
ES (1) ES354572A1 (en:Method)
FR (1) FR1572654A (en:Method)
GB (1) GB1209995A (en:Method)
SE (1) SE337555B (en:Method)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523621A (en) * 1968-04-22 1970-08-11 Caterpillar Tractor Co Ejector for loader bucket
US3738030A (en) * 1971-11-23 1973-06-12 Rome Industries Combination bulldozer blade and bucket
US5555944A (en) * 1993-09-08 1996-09-17 Kabushiki Kaisha Komatsu Seisakusho Twin-scrape dozer
US5702227A (en) * 1996-05-13 1997-12-30 Berg; Ronald Ejector bucket
US6052926A (en) * 1998-09-28 2000-04-25 Stephens; E. Rodney Bucket for a material handling apparatus
US6658769B2 (en) * 1999-12-29 2003-12-09 Gene Klager Self-cleaning hydraulic clam bucket
US20050193601A1 (en) * 2004-02-12 2005-09-08 King George W. Excavator bucket with retainage ejector
US20050252291A1 (en) * 2004-01-27 2005-11-17 Dalla Piazza & Co. Adjustable measuring scoop
CN103088856A (zh) * 2013-02-28 2013-05-08 愚公机械股份有限公司 挖掘机的粘土铲斗
US20190169815A1 (en) * 2017-12-04 2019-06-06 Cory Halischuk Self Cleaning Bucket Assembly for a Digging Machine
US10815639B2 (en) 2017-09-06 2020-10-27 Clark Equipment Company Bucket cleanout
CN113529832A (zh) * 2021-07-02 2021-10-22 国能神东煤炭集团有限责任公司 黄泥取料装置和方法
US12258725B2 (en) 2021-09-09 2025-03-25 John Ryan Farms LLC Environment restricted front bucket loader with material handling
GB2637014A (en) * 2024-01-04 2025-07-09 Mcelduff John Self-cleaning excavator bucket assembly

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2191464A (en) * 1986-05-29 1987-12-16 Nat Res Dev Hinged drop plate for load handling equipment
SE525518C2 (sv) * 2002-03-18 2005-03-01 Ulf Hedberg Balkförstärkning på grävskopa

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122248A (en) * 1961-08-10 1964-02-25 Caterpillar Tractor Co Loader bucket with ejector
US3349934A (en) * 1966-04-26 1967-10-31 Caterpillar Tractor Co Belt ejector bucket and control linkage therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122248A (en) * 1961-08-10 1964-02-25 Caterpillar Tractor Co Loader bucket with ejector
US3349934A (en) * 1966-04-26 1967-10-31 Caterpillar Tractor Co Belt ejector bucket and control linkage therefor

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3523621A (en) * 1968-04-22 1970-08-11 Caterpillar Tractor Co Ejector for loader bucket
US3738030A (en) * 1971-11-23 1973-06-12 Rome Industries Combination bulldozer blade and bucket
US5555944A (en) * 1993-09-08 1996-09-17 Kabushiki Kaisha Komatsu Seisakusho Twin-scrape dozer
US5702227A (en) * 1996-05-13 1997-12-30 Berg; Ronald Ejector bucket
US6052926A (en) * 1998-09-28 2000-04-25 Stephens; E. Rodney Bucket for a material handling apparatus
US6658769B2 (en) * 1999-12-29 2003-12-09 Gene Klager Self-cleaning hydraulic clam bucket
US7503212B2 (en) * 2004-01-27 2009-03-17 Dalla Piazza & Co. Adjustable measuring scoop
US20050252291A1 (en) * 2004-01-27 2005-11-17 Dalla Piazza & Co. Adjustable measuring scoop
US20050193601A1 (en) * 2004-02-12 2005-09-08 King George W. Excavator bucket with retainage ejector
CN103088856A (zh) * 2013-02-28 2013-05-08 愚公机械股份有限公司 挖掘机的粘土铲斗
CN103088856B (zh) * 2013-02-28 2014-01-08 愚公机械股份有限公司 挖掘机的粘土铲斗
US10815639B2 (en) 2017-09-06 2020-10-27 Clark Equipment Company Bucket cleanout
US20190169815A1 (en) * 2017-12-04 2019-06-06 Cory Halischuk Self Cleaning Bucket Assembly for a Digging Machine
US10544560B2 (en) * 2017-12-04 2020-01-28 Cory Halischuk Self cleaning bucket assembly for a digging machine
CN113529832A (zh) * 2021-07-02 2021-10-22 国能神东煤炭集团有限责任公司 黄泥取料装置和方法
US12258725B2 (en) 2021-09-09 2025-03-25 John Ryan Farms LLC Environment restricted front bucket loader with material handling
GB2637014A (en) * 2024-01-04 2025-07-09 Mcelduff John Self-cleaning excavator bucket assembly

Also Published As

Publication number Publication date
ES354572A1 (es) 1969-11-01
FR1572654A (en:Method) 1969-06-27
GB1209995A (en) 1970-10-28
CH474634A (de) 1969-06-30
SE337555B (en:Method) 1971-08-09
BE716458A (en:Method) 1968-11-04
DE1756643A1 (de) 1970-05-06

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