US3648782A - Multipurpose bulldozer assembly - Google Patents

Multipurpose bulldozer assembly Download PDF

Info

Publication number
US3648782A
US3648782A US877984A US3648782DA US3648782A US 3648782 A US3648782 A US 3648782A US 877984 A US877984 A US 877984A US 3648782D A US3648782D A US 3648782DA US 3648782 A US3648782 A US 3648782A
Authority
US
United States
Prior art keywords
moldboard
ball
hydraulic cylinders
tractor
arms
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
US877984A
Other languages
English (en)
Inventor
Janis Mazzarins
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.)
Motors Liquidation Co
Original Assignee
General Motors Corp
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 General Motors Corp filed Critical General Motors Corp
Application granted granted Critical
Publication of US3648782A publication Critical patent/US3648782A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E02F3/76—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
    • 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
    • E02F3/7618—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 horizontal axis

Definitions

  • references Cmd hydraulic cylinders are attached to each arm at substantially UNITED STATES PATENTS the same point and diverge forwardly for universal pivotal attachment to the moldboard and serve to move the latter about DlCkll'lSOll longitudinal vertical and horizontal axes passing through the 2,943,407 7/1967 Long center f the uj 3,002,300 10/1961 Turbyfill..
  • This invention relates to a multi-purpose bulldozer assembly which can be used with either rubber-tired or crawler tractors and permits the blade to be adjusted to various positions so as to facilitate production dozing.
  • Bulldozer blade assemblies of the type which this invention is directed to usually consist of a C-shaped frame, the arms of which are pivotally mounted to a tractor which carries either hydraulic or cable means for lowering and raising the C-frame to a dozing position and a carry position, respectively.
  • the moldboard is connected to the front part of the C- frame through some form of universal connection, and suitable adjustable screw jacks or hydraulic cylinders are positioned on the outboard sides of the C-frame and connected to the rear outer edge of the moldboard for angling, tilting and pitching the latter for various dozing operations.
  • the present invention is intended to alleviate the abovementioned problem with multi-purpose bulldozer assemblies by having the moldboard centrally attached to the front end of the C-frame by a ball and socket joint which permits universal movement of the moldboard.
  • a pair of double-acting hydraulic cylinders are universally pivotally connected at spaced points and converge rearwardly for universal pivotal connection with a side arm of the C-frame at a substantially common point.
  • the arrangement is such that when the cutting blade of the moldboard is in a horizontal position, the points of connection between the hydraulic cylinders and the moldboard are spaced equidistantly from the center of the ball and socket joint.
  • the moldboard can be angled about a vertical axis passing through the center of the ball joint to permit side casting of dirt to either side of the tractor.
  • the moldboard can be pitched forwardly or rearwardly about a horizontal axis passing through the center of the ball and socket joint.
  • the moldboard can be tilted about a longitudinal axis passing through the center of the ball joint without subjecting the C-frame structure and other parts of the bulldozer assembly to undue stresses previously encountered with dozer assemblies of the type described above.
  • the objects of the present invention are to provide a bulldozer assembly having a moldboard which is supported by a ball and socket joint and can be pitched about a horizontal axis, angled about a vertical axis, and tilted about a longitudinal axis so as to permit the moldboard to be used for various dozing operations; to provide a bulldozer assembly in which a central portion of the moldboard is supported by a C- frame through a ball and socket joint and is movable to vari' ous positions about the ball joint through pairs of hydraulic cylinders connected adjacent each side edge of the moldboard and the C-frame at points equidistantly spaced from the center of the ball and socket joint; and to provide a bulldozer assembly which through the use of pairs of diverging double-acting hydraulic cylinders located adjacent each side edge of the moldboard permits a quick change in the attitude of the latter without imposing undue stresses on any of the components of the bulldozer assembly.
  • FIG. 11 is an elevation view showing a tractor equipped with a bulldozer assembly made according to the invention.
  • FIG. 2 is a plan view of the tractor and bulldozer assembly shown in FIG. 11;
  • FIG. 3 is a front view of the tractor and bulldozer assembly of FIGS. 11 and 2 and, with phantom lines, shows the moldboard tilted to two positions about the longitudinal axis of the tractor;
  • FIG. 4 is a plan view of the bulldozer assembly showing the moldboard angled about a vertical axis
  • FIG. 5 is a view showing the bulldozer assembly in the extreme lowered and raised positions
  • FIG. 6 is an enlarged side elevation view of the ball joint connection between the moldboard and the C-frame of the bulldozer assembly
  • FIG. 7 is a plan view with parts broken away of the ball joint connection shown in FIG. 6.
  • a rubber-tired tractor 10 having an operators cab 12 located substantially midway between front and rear axles 14 and 116.
  • An engine compartment 18 is provided in the rear end of the tractor while the front end thereof supports a bulldozer assembly 20 made according to the invention.
  • the bulldozer assembly Ztll includes a C- shaped frame member 22, the front end of which supports a transversely extending moldboard 24 through a ball and socket joint 25, while the rear end includes a pair of laterally spaced arms 26 and 2d, the ends of which are connected to ball members 30 and 32 respectively secured to outwardly extending supports 34 and 36 rigid with the tractor 10.
  • a double-acting hydraulic cylinder 37 extends between a support trunnion 36 on the tractor and a conventional pin and ball type universal joint 39 on the frame member 22 and serves to raise the latter about a horizontal axis passing through the centers of the ball members 30 and 32.
  • each arm 26, 26 of the frame member 22 supports upper and lower doubleacting hydraulic cylinders 46 and 42 which diverge forwardly for connection with the moldboard 24.
  • the moldboard 24 is of a rectangular form, as seen in FIG. 3, and has the lower forward edge thereof provided with a transverse cutting blade 44 as is conventional.
  • the rear surface of the moldboard 24 is formed with a pocket 46 which accommodates horizontally split sleeve members 48 and 50 having spherical inner surfaces which form the socket portion of the ball and socket joint 25 which also includes a ball stud member 52 carried by the frame member 22 midway between the arms 26 and 26.
  • An end collar 53 holds the sleeve members 48 and 56 within the pocket 46, As seen in FIGS. l and 3,
  • the pocket 46 is located centrally of the vertical side edges of the moldboard 24 as well as the top and bottom thereof.
  • this arrangement permits the moldboard 24 to be centrally supported by the front end of the frame member 22 and also allows the arms 26 and 28 of the frame member 22 to be located in a plane which is substantially parallel to the ground 54 when the moldboard 24 is positioned in the lowered dozing position.
  • each side of the frame member 22 is provided with a pair of double-acting hydraulic cylinders 40am! 42.
  • Each of the hydraulic cylinders 40, 42 is identical in size, and as seen in FIGS. 1, 2 and 6, the upper hydraulic cylinder 46 has the cylinder portion thereof universally pivotally connected to an upper part of the moldboard 24 by a conventional ball type joint 55 which includes a transverse pin 56 having a spherical bearing 58 mounted thereon.
  • the lower hydraulic cylinder 42 has the cylinder portion thereof universally pivotally connected to the moldboard 24 adjacent the lower end by a similarly constructed ball type joint 60 which also includes a transverse pin supporting a spherical bearing.
  • piston rod members of the hydraulic cylinders 40 and 42 extend rearwardly for universal pivotal connection by pin and ball joints 64 and 66 to a support bracket 68 rigidly attached to the associated arm of the frame member 22.
  • pin and ball joints 64 and 66 joining the piston rods to the support bracket 68 are located closely adjacent to each other and substantially at the same point. For that matter, assuming proper clearances are available, the piston rods of the hydraulic cylinders 40 and 42 can be secured by a common universal joint to the frame member 22 without impairing the operability of this bulldozer assembly.
  • the arrangement of the hydraulic cylinders 40 and 42 is such that the latter diverge forwardly for universal pivotal connection with the moldboard 24 at points which, as viewed in FIG. 1, are equidistantly spaced from the center of the ball portion of the ball stud 52. Moreover, a plane passing through the centers of the ball members 30 and 32 and the ball portion of the ball stud 52, forms equal angles with the longitudinal center axes of the hydraulic cylinders 40 and 42. This is an important aspect of this invention because as will be explained hereinafter, movement of the moldboard 24 to the various dozing positions is facilitated without imposing large stress concentrations in any of the components which make up the bulldozer assembly 20.
  • a bulldozer assembly mounted at the front end of said tractor and including a C- shaped frame member having a pair of rearwardly extending arms supported for pivotal movement between a raised position and a lowered position about a horizontal axis extending transversely to the longitudinal axis of said tractor, a mold board having a cutting blade at the lower end thereof, a ball and socket joint universally connecting the rear portion of the moldboard to the front end of the C-shaped frame at a point midway between said arms, said ball and socket joint including a ball stud member fixed to said C-shaped frame and a spherical socket portion formed in said moldboard, a pair of identical double-acting hydraulic cylinders associated with each of said arms, means universally pivotally attaching one end of said hydraulic cylinders to each of said arms along the outer side thereof and at substantially the same point, means universally pivotally connecting the other end of said pair of doubleacting hydraulic cylinders to said moldboard at vertically spaced points equidist
  • a bulldozer assembly mounted at the front end of said tractor and including a C- shaped frame member having a pair of rearwardly extending arms supported for pivotal movement between a raised position and a lowered position about a horizontal axis extending transversely to the longitudinal axis of said tractor, a moldboard having a cutting blade at the lower end thereof, a ball and socket joint connecting the center of the rear portion of the moldboard to the front end of the C-shaped frame at a point midway between said arms, a pair of identical doubleacting hydraulic cylinders associated with each of said arms, first ball type joints universally pivotally attaching one end of said hydraulic cylinders to each of said arms along the outer side thereof in a manner whereby the longitudinal center axes of the hydraulic cylinders intersect at a point which lies .in a plane passing through said horizontal axis and the center of the ball and socket joint, second ball type joints universally pivotally connecting the other end of said pair of double-acting hydraulic cylinders to the

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Agricultural Machines (AREA)
  • Soil Working Implements (AREA)
  • Operation Control Of Excavators (AREA)
US877984A 1969-11-19 1969-11-19 Multipurpose bulldozer assembly Expired - Lifetime US3648782A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87798469A 1969-11-19 1969-11-19

Publications (1)

Publication Number Publication Date
US3648782A true US3648782A (en) 1972-03-14

Family

ID=25371132

Family Applications (1)

Application Number Title Priority Date Filing Date
US877984A Expired - Lifetime US3648782A (en) 1969-11-19 1969-11-19 Multipurpose bulldozer assembly

Country Status (2)

Country Link
US (1) US3648782A (cs)
GB (1) GB1265110A (cs)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866342A (en) * 1973-02-13 1975-02-18 George R Cooper Reversible snow plow attachment for wheeled vehicles
US4013132A (en) * 1975-01-06 1977-03-22 Mitsubishi Jukogyo Kabushiki Kaisha Device for supporting bulldozer blade
US6659194B1 (en) * 2002-11-22 2003-12-09 Samuel C. Thompson Blade angle adjustment system
US6892825B1 (en) * 2004-03-09 2005-05-17 Donald G. Hopson Bulldozer rear blade mounting apparatus
US20050236226A1 (en) * 2004-04-21 2005-10-27 Salmi James A Aerial ladder cradle assembly
US7093906B1 (en) * 2001-12-21 2006-08-22 Davidson Rex D Floor scraping machine with floating blade
US20090050342A1 (en) * 2005-06-30 2009-02-26 Deere & Company Grease actuated ball and socket joint
US20110011604A1 (en) * 2008-03-06 2011-01-20 Yanmar Co., Ltd. Earth Moving Device for Working Vehicle
US20110038663A1 (en) * 2009-08-17 2011-02-17 Harnischfeger Technologies, Inc. Method of attaching two large structural members
US20110067892A1 (en) * 2008-08-04 2011-03-24 Kubota Corporation Dozer Apparatus
US20150308060A1 (en) * 2014-04-28 2015-10-29 Robert L. Beaird, Iii Snowplow apparatus for a motor vehicle
US9267264B2 (en) * 2011-05-04 2016-02-23 Deere & Company Blade pivot mechanism
US20160108603A1 (en) * 2015-10-27 2016-04-21 Caterpillar Inc. System for controlling earthworking implement
CN106193149A (zh) * 2016-08-16 2016-12-07 陈泳东 一种新型推土机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023625A (en) * 1975-09-05 1977-05-17 Caterpillar Tractor Co. Structure mounting a bulldozer assembly to a vehicle
US4966240A (en) * 1987-12-16 1990-10-30 Kubota, Ltd. Combination backhoe vehicle and bulldozer apparatus
IT1391878B1 (it) * 2008-11-21 2012-01-27 New Holland Kobelco Construction Machinery S P A Macchina movimento terra convertibile ed attrezzatura addizionale per detta macchina

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687586A (en) * 1950-06-28 1954-08-31 Monty W Dickinson Adjustable bulldozer blade
US2943407A (en) * 1958-02-27 1960-07-05 Case Co J I Bulldozer blade mounting
US3002300A (en) * 1959-04-28 1961-10-03 Caterpillar Tractor Co Bulldozer with laterally adjustable blade
US3157099A (en) * 1960-09-06 1964-11-17 Ulrich Mfg Co Earth materials handling apparatus
US3213553A (en) * 1962-10-01 1965-10-26 Gerard G Weil Hydraulically adjustable dozer blade
US3234670A (en) * 1962-06-22 1966-02-15 Caterpillar Tractor Co Bracing arrangement for tiltdozer blades
US3529678A (en) * 1968-08-14 1970-09-22 Caterpillar Tractor Co Mounting for bulldozer blades

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687586A (en) * 1950-06-28 1954-08-31 Monty W Dickinson Adjustable bulldozer blade
US2943407A (en) * 1958-02-27 1960-07-05 Case Co J I Bulldozer blade mounting
US3002300A (en) * 1959-04-28 1961-10-03 Caterpillar Tractor Co Bulldozer with laterally adjustable blade
US3157099A (en) * 1960-09-06 1964-11-17 Ulrich Mfg Co Earth materials handling apparatus
US3234670A (en) * 1962-06-22 1966-02-15 Caterpillar Tractor Co Bracing arrangement for tiltdozer blades
US3213553A (en) * 1962-10-01 1965-10-26 Gerard G Weil Hydraulically adjustable dozer blade
US3529678A (en) * 1968-08-14 1970-09-22 Caterpillar Tractor Co Mounting for bulldozer blades

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3866342A (en) * 1973-02-13 1975-02-18 George R Cooper Reversible snow plow attachment for wheeled vehicles
US4013132A (en) * 1975-01-06 1977-03-22 Mitsubishi Jukogyo Kabushiki Kaisha Device for supporting bulldozer blade
US7093906B1 (en) * 2001-12-21 2006-08-22 Davidson Rex D Floor scraping machine with floating blade
US6659194B1 (en) * 2002-11-22 2003-12-09 Samuel C. Thompson Blade angle adjustment system
US6892825B1 (en) * 2004-03-09 2005-05-17 Donald G. Hopson Bulldozer rear blade mounting apparatus
US7178631B2 (en) * 2004-04-21 2007-02-20 Spartan Motors, Inc. Aerial ladder cradle assembly
US20050236226A1 (en) * 2004-04-21 2005-10-27 Salmi James A Aerial ladder cradle assembly
US20090050342A1 (en) * 2005-06-30 2009-02-26 Deere & Company Grease actuated ball and socket joint
US7814985B2 (en) * 2005-06-30 2010-10-19 Deere & Company Grease actuated ball and socket joint
US20110011604A1 (en) * 2008-03-06 2011-01-20 Yanmar Co., Ltd. Earth Moving Device for Working Vehicle
US8292000B2 (en) * 2008-03-06 2012-10-23 Yanmar Co., Ltd. Earth moving device for working vehicle
US8678103B2 (en) * 2008-08-04 2014-03-25 Kubota Corporation Dozer apparatus
US20110067892A1 (en) * 2008-08-04 2011-03-24 Kubota Corporation Dozer Apparatus
US20110038663A1 (en) * 2009-08-17 2011-02-17 Harnischfeger Technologies, Inc. Method of attaching two large structural members
US8316525B2 (en) * 2009-08-17 2012-11-27 Harnischfeger Technologies, Inc. Method of attaching two large structural members
US9267264B2 (en) * 2011-05-04 2016-02-23 Deere & Company Blade pivot mechanism
US20150308060A1 (en) * 2014-04-28 2015-10-29 Robert L. Beaird, Iii Snowplow apparatus for a motor vehicle
US9765492B2 (en) * 2014-04-28 2017-09-19 Robert L. Beaird, Iii Snowplow apparatus for a motor vehicle
US20160108603A1 (en) * 2015-10-27 2016-04-21 Caterpillar Inc. System for controlling earthworking implement
CN106193149A (zh) * 2016-08-16 2016-12-07 陈泳东 一种新型推土机
CN108755798A (zh) * 2016-08-16 2018-11-06 乌鲁木齐九品芝麻信息科技有限公司 一种新型推土机
CN108755799A (zh) * 2016-08-16 2018-11-06 乌鲁木齐九品芝麻信息科技有限公司 一种新型推土机

Also Published As

Publication number Publication date
GB1265110A (cs) 1972-03-01

Similar Documents

Publication Publication Date Title
US3648782A (en) Multipurpose bulldozer assembly
US4279312A (en) Dual tractor road grader with double arched center frame
US3913684A (en) Implement mounting arrangement having lifting and angling capability
US5403144A (en) Blade tilt assembly for a front end loader
US3631930A (en) Mounting arrangement for bulldozer blades
US4364438A (en) Dual tractor road grader with double arched center frame
US3529678A (en) Mounting for bulldozer blades
US4953625A (en) Adjustable, pivotable blade for bulldozers and the like
US3631931A (en) Bulldozer
US6105682A (en) Apparatus for controlling an earthworking implement having four degrees of freedom
US3901329A (en) Bulldozer stabilizer linkage
US7013983B2 (en) Blade mounting structure of bulldozer
US3653451A (en) Tilt linkage for bulldozer blade mounting assemblies
US3122850A (en) Four wheel vehicle
US5661917A (en) Civil engineering works machine in which the working tool is mounted at the end of an articulated arm
US3149737A (en) Hydraulic shovels
US2678508A (en) Adjustable bulldozer
US4083414A (en) Combination angling-tilting bulldozer
US3628612A (en) Mounting arrangement for bulldozer blades
US3690386A (en) Angle and tilt mechanism for dozer blade
US4464852A (en) Dozer attachment for excavator
US3653131A (en) Excavating apparatus
US4562891A (en) Front vehicle blade mount
US3698490A (en) Bulldozer mounting and controls
US2942363A (en) Bulldozer