US3901329A - Bulldozer stabilizer linkage - Google Patents

Bulldozer stabilizer linkage Download PDF

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Publication number
US3901329A
US3901329A US483914A US48391474A US3901329A US 3901329 A US3901329 A US 3901329A US 483914 A US483914 A US 483914A US 48391474 A US48391474 A US 48391474A US 3901329 A US3901329 A US 3901329A
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US
United States
Prior art keywords
blade
frame
earth
movement
working vehicle
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
US483914A
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English (en)
Inventor
Larry G Eftefield
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
Priority to US483914A priority Critical patent/US3901329A/en
Priority to CA217,648A priority patent/CA1000492A/en
Priority to BR1935/75A priority patent/BR7501503A/pt
Priority to GB1797375A priority patent/GB1462583A/en
Priority to JP50079479A priority patent/JPS5118103A/ja
Application granted granted Critical
Publication of US3901329A publication Critical patent/US3901329A/en
Assigned to CATERPILLAR INC., A CORP. OF DE. reassignment CATERPILLAR INC., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CATERPILLAR TRACTOR CO., A CORP. OF CALIF.
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
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/80—Component parts
    • E02F3/815—Blades; Levelling or scarifying tools
    • E02F3/8157—Shock absorbers; Supports, e.g. skids, rollers; Devices for compensating wear-and-tear, 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
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7609—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers
    • E02F3/7613—Scraper blade mounted forwardly of the tractor on a pair of pivoting arms which are linked to the sides of the tractor, e.g. bulldozers with the scraper blade adjustable relative to the pivoting arms about a vertical axis, e.g. angle dozers

Definitions

  • the linkage is employed in an earth-working vehicle having a frame, a pair of push arms pivotally secured to the frame and a blade pivotally mounted on the push arms.
  • the linkage interconnects the front of the frame and the rear of the blade.
  • the linkage comprises a first link pivotally connected to the front of the frame for pivotal movement about a first pivot axis and a second link pivotally connected to the rear of the blade for movement about a second pivot axis transverse to the first pivot axis.
  • the links are connected to each other by a universal joint.
  • the linkage maximizes stabilization of the blade against lateral shifting for vertical, tilting and angular movement of the blade relative to the frame.
  • Earth-working vehicles equipped with bulldozer blades typically have a main vehicle frame flanked by track frames.
  • the bulldozing blade is typically pivotally mounted forwardly of the front end of the main frame on long push arms which extend substantially rearwardly and flank the track frames.
  • the push arms are pivotally connected to the track frames near the rear of the vehicle.
  • the push arms are spaced but a short distance from the adjacent track frames. Such spacing must be main tained or else injurious contact between the track on a track frame and the push arms would result. Such contact is a distinct possibility due to the substantial stresses that are developed in the operation of such tractors. The stresses are large due to the powerful tractive effort of the vehicles as well as the frequency of off-center loading of the blade. Moreover, directional changes of the vehicle when the blade is engaged with the earth similarly can produce large forces that would. cause lateral shifting of the blade to the point that such contact could occur if means were not taken to prevent such contact.
  • a blade stablizing linkage is employed to interconnect the main frame of the vehicle and the blade to minimize such lateral shifting to the point where injurious contact of the type mentioned previously cannot occur.
  • linkages have impeded provision of other desirable features in connection with blade mounting on the tractor.
  • many such linkages permit only vertical and tilting movement of the blade relative to the vehicle.
  • Others are extremely bulky as, for example, in extending substantially rearwardly to a pivot axis coextensive with the pivot axis of the push arms to their point of connection to the track frames.
  • An exemplary embodiment of the invention achieves the foregoing object in an earth-working vehicle having a frame, a pair of push arms pivotally secured at one end to the frame, a blade pivotally secured to the push arms at the other ends thereof with a stabilizing linkage comprising two links.
  • a first of the links is pivotally connected to the front end of the frame for pivotal movement thereon about a first pivot axis.
  • the second of the links is pivotally connected to the rear of the blade for pivotal movement relative thereto about a second pivot axis which is transverse to the first pivot axis.
  • the links are then interconnected by a universal connection.
  • one of the pivot axes is vertical and the other pivot axis is horizontal.
  • the universal connection comprises a ball joint.
  • the foregoing linkage stabilizes the blade against substantial lateral movement during vertical, tilting, tipping, and angling movement of the blade relative to the vehicle.
  • the first mentioned link which is pivotally connected to the vehicle frame, has a length just slightly less than the distance between the front end of the frame and the back of the blade so that the second link, in many positions of the blade relative to the frame, is substantially parallel to the blade.
  • FIG. 1 is a plan view of an earth-working vehicle embodying the invention
  • FIG. 2 is an enlarged, fragmentary side elevation of the vehicle
  • FIG. 3 is an enlarged, fragmentary view of one form of linkage made according to the invention.
  • FIG. 4 is an enlarged, fragmentary view of a second form of linkage made according to the invention.
  • FIG. 5 is a somewhat schematic plan view of the invention illustrating angling of the blade relative to a vehicle frame.
  • FIGS. 1 and 2 An exemplary embodiment of an earth-working vehi cle made according to the invention is illustrated in FIGS. 1 and 2 and is seen to include a vehicle, generally designated 10, having a main frame 12 flanked by a pair of track frames 14.
  • Drive components, generally designated 16 are driven by an engine (not shown) and, in turn, drive chain drive sprockets 18 which, in turn, drive track chains 20.
  • track roller assemblies 24 may be provided on each of the track frames l4for engaging the lower run of each track chain 20.
  • a bulldozer blade Forwardly of the front end 26 of the frame 12 is a bulldozer blade, generally designated 28.
  • the blade 28 is secured to the vehicle 10 by means of a pair of clevis type connections 30 at opposite sides thereof located near the lower end of the blade 28 and on the back thereof to push arms 32 which flank the track frames 14.
  • clevis type connections 30 at opposite sides thereof located near the lower end of the blade 28 and on the back thereof to push arms 32 which flank the track frames 14.
  • connections 30 provide for pivotal mounting of the blade 28 on the push arms 32 for movement about two mutually perpendicular axes.
  • the ends of the push arms 32 opposite from the connection 30 are pivotally connected to trunnions 34 which, in turn, are secured to the track frames 14.
  • Bearings 36 of any suitable type may be provided.
  • Each track frame 14 also mounts an L-shaped frame 38 which, at one end, pivotally mounts, by means of a pin 40, a triangular bellcrank 42.
  • the other end of the frame 38 pivotally mounts, as by a pin 44, a hydraulic cylinder 46 which has its piston rod 48 pivotally connected as by a pin 50 to the bellcrank 42.
  • the bellcrank 42 is pivotally connected as by a pin 52 to a link 54 which in turn is pivotally connected by a pin 56 to a bracket 58 secured to the corresponding push arm 32.
  • the bracket 56 also mounts a further pivot pin 60 which pivotally mounts one end of a hydraulic cylinder 64.
  • the rod end 62 of the hydraulic cylinder 64 is connected by a clevis type mounting similar to that illustrated at 30 to the upper rear end of the blade 28.
  • the vertical attitude of the blade 28 relative to the frame may be varied.
  • the blade 28 may be made to tilt relative to the frame.
  • the cylinders 64 may be replaced with struts.
  • each push arm is made up of two sections including a first tubular section 70 which may be telescopingly received in a second tubular section 72.
  • the former is secured by a suitable pivot to the track frame 14, while the latter is secured as by the previously described clevis to the back of the blade.
  • Within the member 70 is a hydraulic cylinder 74 pivotally secured by a pivot pin 76 in any suitable fashion to a suitable bracket on the interior of the member 70.
  • the rod 78 of the cylinder 74 is pivotally secured as by pin 80 to any suitable bracket within the interior of the member 72.
  • the blade 28 may be angled with respect to the frame as illustrated in FIG. 5.
  • a stabilizing means is interposed between the front end 26 of the frame 12 and the back of the blade 28.
  • one form of stabilizing linkage 100 is seen to consist of an A-frame type of link 102, having its legs connected as by pivot pins 104 to ears 106 secured to the front end of the tractor frame 12.
  • the pivot pins 104 provided for rotation of the link 102 about a substantially horizontal axis.
  • the link 102 has a length just slightly less than the distance between the front end 26 of the frame and the rear side of the blade
  • a second link 110 has one end pivotally connected as by a pin 112 to rearwardly extending ears 114 on the back of the blade 28.
  • the pivot axis defined by the pin 112 is transverse to the pivot axis defined by the pins 104, i.e., vertical, and the arrangement is such that the link 110 is generally parallel to the rear side of the blade 28.
  • the ends of the links 102 and 110 remote from their respective pivot pins 104 and 112 are universally connected together.
  • a ball joint 116 is employed for this purpose.
  • FIG. 4 Still another form of linkage embodying the invention is illustrated in FIG. 4.
  • forwardly extending ears 120 secured to the front end 26 of the vehicle frame 12 mount a pivot pin 122, which, in turn, pivotally impales one end of a link 124.
  • the opposite end of the link 124 mounts the ball element 126 of the ball joint which is completed by the apex 128 of an A-frame link 130.
  • the legs of the A-frame link 130 are pivotally connected as by pins 132 to rearwardly extending ears 134 on the back of the blade 28.
  • the arrangement is such that the pivot axis defined by pivot 122 is transverse to the pivot axis defined by the pins 132, the link 130 is slightly less in length than the distance between the blade and the frame front, and the link 124 is generally parallel to the blade 28,
  • the blade 28 may be moved vertically, through tilting and angular positions, with respect to the vehicle frame. Examples of vertical and angular movement are illustrated in FIGS. 2 and 5 and it will be recognized that the stabilizing means of the invention provide substantial resistance to lateral movement of the blade 28 due to the variety of stresses encountered in operation and yet accommodate universal blade movement with respect to the frame. It will also be recognized that the components of the stabilizing means 100 are simple in nature and readily accessible for servicing by reason of their exposure.
  • first link i.e., that secured to the tractor frame
  • first link is chosen to have a length just slightly less than the usual distance between the front end of the frame and the back of the blade 28
  • relatively short links may be employed so that there is minimal deflection and maximum stabilization.
  • An earth-working vehicle according to claim 1 6.
  • An earth-working vehicle according to claim 1 furwherein said first link has a length just slightly less than ther including means whereby the effective length of at the distance between the front end of the frame and the least one of said push arms may be varied. back of the blade.

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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)
US483914A 1974-06-28 1974-06-28 Bulldozer stabilizer linkage Expired - Lifetime US3901329A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US483914A US3901329A (en) 1974-06-28 1974-06-28 Bulldozer stabilizer linkage
CA217,648A CA1000492A (en) 1974-06-28 1975-01-09 Bulldozer stabilizer linkage
BR1935/75A BR7501503A (pt) 1974-06-28 1975-03-13 Veiculo para movimentacao de terras
GB1797375A GB1462583A (en) 1974-06-28 1975-04-30 Earth working vehicle having a stabilizer linkage
JP50079479A JPS5118103A (ja) 1974-06-28 1975-06-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US483914A US3901329A (en) 1974-06-28 1974-06-28 Bulldozer stabilizer linkage

Publications (1)

Publication Number Publication Date
US3901329A true US3901329A (en) 1975-08-26

Family

ID=23922004

Family Applications (1)

Application Number Title Priority Date Filing Date
US483914A Expired - Lifetime US3901329A (en) 1974-06-28 1974-06-28 Bulldozer stabilizer linkage

Country Status (5)

Country Link
US (1) US3901329A (ja)
JP (1) JPS5118103A (ja)
BR (1) BR7501503A (ja)
CA (1) CA1000492A (ja)
GB (1) GB1462583A (ja)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081036A (en) * 1976-07-20 1978-03-28 Kabushiki Kaisha Komatsu Seisakusho Mounting arrangement for supporting bulldozer blade
US4135584A (en) * 1977-09-19 1979-01-23 Caterpillar Tractor Co. Blade stabilizing linkage for a bulldozer
US4189010A (en) * 1978-01-27 1980-02-19 Caterpillar Tractor Co. Power angling bulldozer assembly
US4211282A (en) * 1978-10-23 1980-07-08 J. I. Case Company Adjustable blade stabilizer and controls
WO1984000570A1 (en) * 1982-07-30 1984-02-16 Bombardier Rotax Wien Device for attaching a tool to a vehicle
US4664203A (en) * 1985-09-23 1987-05-12 Dresser Industries, Inc. Blade support for bulldozers and the like
US5538216A (en) * 1994-03-30 1996-07-23 Man Gutehoffnungshutte Support device of a laying vehicle, especially of a track-laying vehicle
US5634523A (en) * 1993-06-29 1997-06-03 Kabushiki Kaisha Komatsu Seisakusho Blade device
US20100007118A1 (en) * 2008-07-10 2010-01-14 Caterpillar Inc. Tandem wheel arrangement
US20110114410A1 (en) * 2008-07-10 2011-05-19 Caterpillar Inc. Tandem Wheel Arrangement
WO2015190937A1 (en) * 2014-06-10 2015-12-17 Progressive Ip Limited Blade levelling apparatus and mounting system
US10676894B2 (en) 2014-06-10 2020-06-09 Progressive Ip Limited Blade levelling apparatus with provision for mounted accessories
US20210010232A1 (en) * 2019-07-11 2021-01-14 Hank Rose Reconfigurable box blade
US11946220B2 (en) 2017-01-05 2024-04-02 9407-4895 Quebec Inc. Scraping device for cleaning a roadway surface

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5423629A (en) * 1977-07-25 1979-02-22 Sagami Kougiyou Kk Removal of soft rock in raw stone for aggregate
JPS5428060A (en) * 1977-08-02 1979-03-02 Hikoichi Irie Stopplog device of crushed stone
JPS5436177U (ja) * 1977-08-17 1979-03-09
JPS5567552A (en) * 1978-11-14 1980-05-21 Chikage Sando Kk Concrete mixing material
JPH0775675B2 (ja) * 1989-02-23 1995-08-16 ナカヤ実業株式会社 コンクリート用砕砂製造装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624131A (en) * 1948-03-03 1953-01-06 Allis Chalmers Mfg Co Bulldozer with push frame stabilizer mechanism
US3222804A (en) * 1964-01-14 1965-12-14 Gen Motors Corp Lift mechanism for dozer blade assembly
US3234670A (en) * 1962-06-22 1966-02-15 Caterpillar Tractor Co Bracing arrangement for tiltdozer blades
US3656558A (en) * 1970-10-30 1972-04-18 Int Harvester Co Bulldozer frame with arm stress equalizer and/or limiter
US3743032A (en) * 1972-06-14 1973-07-03 Allis Chalmers Mfg Co Dozer with no bind tilt linkage

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2624131A (en) * 1948-03-03 1953-01-06 Allis Chalmers Mfg Co Bulldozer with push frame stabilizer mechanism
US3234670A (en) * 1962-06-22 1966-02-15 Caterpillar Tractor Co Bracing arrangement for tiltdozer blades
US3222804A (en) * 1964-01-14 1965-12-14 Gen Motors Corp Lift mechanism for dozer blade assembly
US3656558A (en) * 1970-10-30 1972-04-18 Int Harvester Co Bulldozer frame with arm stress equalizer and/or limiter
US3743032A (en) * 1972-06-14 1973-07-03 Allis Chalmers Mfg Co Dozer with no bind tilt linkage

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4081036A (en) * 1976-07-20 1978-03-28 Kabushiki Kaisha Komatsu Seisakusho Mounting arrangement for supporting bulldozer blade
US4135584A (en) * 1977-09-19 1979-01-23 Caterpillar Tractor Co. Blade stabilizing linkage for a bulldozer
US4189010A (en) * 1978-01-27 1980-02-19 Caterpillar Tractor Co. Power angling bulldozer assembly
US4211282A (en) * 1978-10-23 1980-07-08 J. I. Case Company Adjustable blade stabilizer and controls
WO1984000570A1 (en) * 1982-07-30 1984-02-16 Bombardier Rotax Wien Device for attaching a tool to a vehicle
US4664203A (en) * 1985-09-23 1987-05-12 Dresser Industries, Inc. Blade support for bulldozers and the like
US5634523A (en) * 1993-06-29 1997-06-03 Kabushiki Kaisha Komatsu Seisakusho Blade device
US5538216A (en) * 1994-03-30 1996-07-23 Man Gutehoffnungshutte Support device of a laying vehicle, especially of a track-laying vehicle
US20110114410A1 (en) * 2008-07-10 2011-05-19 Caterpillar Inc. Tandem Wheel Arrangement
US8262125B2 (en) 2008-07-10 2012-09-11 Caterpillar Inc. Tandem wheel arrangement
WO2010005974A3 (en) * 2008-07-10 2010-03-25 Caterpillar Inc. Tandem wheel arrangement
US7837220B2 (en) 2008-07-10 2010-11-23 Caterpillar Inc Tandem wheel arrangement
US20100007118A1 (en) * 2008-07-10 2010-01-14 Caterpillar Inc. Tandem wheel arrangement
CN102089168A (zh) * 2008-07-10 2011-06-08 卡特彼勒公司 串联车轮装置
CN102089168B (zh) * 2008-07-10 2014-07-30 卡特彼勒公司 串联车轮装置
WO2010005974A2 (en) * 2008-07-10 2010-01-14 Caterpillar Inc. Tandem wheel arrangement
WO2012051092A3 (en) * 2010-10-13 2012-07-12 Caterpillar Inc. Tandem wheel arrangement
WO2012051092A2 (en) * 2010-10-13 2012-04-19 Caterpillar Inc. Tandem wheel arrangement
WO2015190937A1 (en) * 2014-06-10 2015-12-17 Progressive Ip Limited Blade levelling apparatus and mounting system
US10323382B2 (en) 2014-06-10 2019-06-18 Progressive Ip Limited Blade levelling apparatus and mounting system
US10676894B2 (en) 2014-06-10 2020-06-09 Progressive Ip Limited Blade levelling apparatus with provision for mounted accessories
US11236484B2 (en) 2014-06-10 2022-02-01 Progressive Ip Limited Blade levelling apparatus and mounting system
US11946220B2 (en) 2017-01-05 2024-04-02 9407-4895 Quebec Inc. Scraping device for cleaning a roadway surface
US20210010232A1 (en) * 2019-07-11 2021-01-14 Hank Rose Reconfigurable box blade

Also Published As

Publication number Publication date
BR7501503A (pt) 1976-06-29
JPS5118103A (ja) 1976-02-13
GB1462583A (en) 1977-01-26
CA1000492A (en) 1976-11-30

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CATERPILLAR INC., 100 N.E. ADAMS STREET, PEORIA, I

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515

Owner name: CATERPILLAR INC., A CORP. OF DE.,ILLINOIS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CATERPILLAR TRACTOR CO., A CORP. OF CALIF.;REEL/FRAME:004669/0905

Effective date: 19860515