US3853181A - Two-way bulldozer - Google Patents

Two-way bulldozer Download PDF

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Publication number
US3853181A
US3853181A US00394123A US39412373A US3853181A US 3853181 A US3853181 A US 3853181A US 00394123 A US00394123 A US 00394123A US 39412373 A US39412373 A US 39412373A US 3853181 A US3853181 A US 3853181A
Authority
US
United States
Prior art keywords
blade
pivotally connected
cylindrical member
bulldozer
frame
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
US00394123A
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English (en)
Inventor
H Yoshizaki
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 Mitsubishi Ltd
Original Assignee
Caterpillar Mitsubishi Ltd
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 Mitsubishi Ltd filed Critical Caterpillar Mitsubishi Ltd
Application granted granted Critical
Publication of US3853181A publication Critical patent/US3853181A/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
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7622—Scraper equipment with the scraper blade mounted on a frame to be hitched to the tractor by bars, arms, chains or the like, the frame having no ground supporting means of its own, e.g. drag scrapers
    • E02F3/7631—Scraper equipment with the scraper blade mounted on a frame to be hitched to the tractor by bars, arms, chains or the like, the frame having no ground supporting means of its own, e.g. drag scrapers with the scraper blade adjustable relative to the frame about a horizontal axis
    • 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
    • E02F3/7622—Scraper equipment with the scraper blade mounted on a frame to be hitched to the tractor by bars, arms, chains or the like, the frame having no ground supporting means of its own, e.g. drag scrapers
    • E02F3/7627—Scraper equipment with the scraper blade mounted on a frame to be hitched to the tractor by bars, arms, chains or the like, the frame having no ground supporting means of its own, e.g. drag scrapers with the scraper blade adjustable relative to the frame about a vertical axis

Definitions

  • ABSTRACT [30] Foreign Application priority Data
  • a two-way bulldozer blade is arrangedin a conven- Se t 8 1972 Ja an 47 89562 tional earth moving machine so as to be capable of p p being tipped forward or backward for the purpose of [52]
  • U S 7 172/805 172/739 collecting, loosening, and dozing material such as dirt [5 I] 3/76 and rock.
  • the blade forward or backward i.e1, trimming
  • This invention relates to an earth moving machine provided with blade-operating devices, and more particularly to an earth moving machine wherein the blade-operating'devices consist of a device to tip the blade forward or backward, and a device to change the blade angle.
  • An earth moving machine provided with a bladewhich may be tipped forward or backward, and which may be angled, may be adapted to a variety of uses. For example, it can be used in restricted spaces such as ships, buildings and tunnels, and results in an increase of operating efficiency.
  • Construction machines which 7 include a blade assembly which may be tipped forward or backward (i.e., trimming have so far been provided.
  • Japanese Patent Publication No; 20503/72 two bulldozer blades arranged vertically are connected to each other by hinges, and the lower bulldozer blade is rendered slidable back and forth about the axis of the hinge.
  • the present invention relates to a practically workable angling device combined with a trimming device, and results in a universal blade capable of trimming and angling.
  • the invention is a bulldozer having a blade-operating device comprising a semi-elliptical frame pivotally connected to and extending from the sides of the bulldozer, and having an upwardly extendin g portion extending from the bulldozer, and a generally horizontal curved portion extending from the upwardly extending portion.
  • Hydraulic cylinder means interconnect to the :upwardly extending portion and the front sides of the bulldozer for raisingand lowering the frame.
  • a cylindrical member is disposed adjacent the forward end of the curved portion of the frame.
  • a first bracket is fixed to the central upper face of the cylindrical member, and a hinge pin pivotally connects the forward end of the curved portion of the frame with the first bracket.
  • Second and third brackets are fixed to the cylindrical member on either side of the first bracket.
  • a first pair of hydraulic cylinders are included, one end of one cylinder being pivotally connected to the second.
  • bracket and the other end being pivotally connected relative to the frame, one end of the other cylinder being connected tothe third bracketand the other end.
  • First and second pivot pins are rotatably associated with the opposite ends of the cylindrical member respectively.
  • a rectangular blade is rotatably supported relative. to the cylindrical member by means of the first and second pivot pins and adapted to be disposed along the opposite ends and the lower portion of the cylindrical member.
  • firstand second bowlike members oneend of each bow-like member being secured to the back side of the blade.
  • a second pair of hydraulic cylinders one end of one cylinder being pivotally connected relative to the cylindrical member and the other end being pivotally connected to the extended end of one of the bow-like members, one end of the other cylinder being pivotally connected relative to the cylindrical member and the other end being pivotally connected to the extended end of the other bow like member.
  • FIG. 1 is a side elevational view of a bulldozer incorporating the present invention
  • FIG. 2 is a plan view of the bulldozer of FIG. 1
  • FIG. 3 is a plan view of a frame and blade of the present invention. 7
  • FIG. 4 is a sectional view taken along the line 4-4 of FIG. 3;
  • FIG. 5 is a sectional view taken along the line 55 of FIG. 3;
  • FIG. 6 is a partial side view showing the relationships betweenan angling cylinder and the blade
  • FIGS. 7 and 8 are views of a back side of a blade partially broken away
  • FIG. 9 is a side view showing the relationships between a trimming cylinder and the blade.
  • FIG. l0 is a front view showing the whole of the blad and the structure associated'therewith.
  • FIGS. 1 and 2 DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • a bulldozer including a tractor body 17, a crawler 30 and a track roller frame 31, provided with a frame 13.
  • the frame I3 is of semielliptical configuration, and is pivotally connected to and extends from a hard bar 19, disposed inside the track roller frame 31.
  • the semi-elliptical C-frame has anupwardly extending portion extending from the bulldozer, and a generally horizontal curved portion extending from the upwardly extending portion, as shown.
  • Hydraulic cylinders 18 are provided for raising and lowering the frame 13. One end of each hydraulic cylinder 18 is pivoted on bracket 32 fixed relative to tractor l7, and the other end is pivotally connected to a bracket 33 fixed to the upwardly extending portion of the frame 13.
  • a bracket 9 is secured to the central upper face of a cylindrical ,member 4 which is disposed adjacent the forward .end of the curved portion of the frame 13.
  • the curved tip of the frame 13 is vertically held between fix ing portions 9A of bracket 9.
  • bracket 9 and the forward end of the curved portion of the frame 13 are pivotally connected by means of ahinge pin 10.
  • a bracket 8 is fixed to cylindrical member 4.
  • Two pin bosses 8', 8" are juxtaposed on bracket 8, and a pin 20 is inserted into pin boss 8".
  • Further included are hydraulic cylinders 7, as shown.
  • the tip of the piston rod of one hydraulic cylinder 7 is pivoted on pin 20.
  • End 7A onthe hinge side of that hydraulic cylinder 7 is pivoted on spherical bearings of a bracket 6 fixed to the frame 13.
  • a pin 11 is inserted into pin boss 8.
  • a support plate like linking member 12 is disposed between and pivotally connected to hinge pin and pin 11, and immediately under portion 9B.
  • a bracket 8A is fixed to the cylindrical member 4.
  • the brackets 8 and 8A are fixed to the cylindrical member 4 on either side of the bracket 9;
  • the other hydraulic cylinder 7 is disposed in a posi-- tion symmetrical to the first-mentioned hydraulic cylinder 7.
  • This latter hydraulic member 7 is pivotally se- 7 cured to the bracket 8A and to a bracket 6 fixed to the frame 13.
  • cylindrical member 4 is movable over a relativey great arc, as shown in FIG. 3.
  • FIG. 10 a blade assembly.
  • the blade assembly includes stationary and movable portions, the stationary portion being cylindrical member 4 shown in 7 brackets 8, 8A a pair of bow-like member 2 each have one end secured to the back side 38 of the blade 3.
  • a second pair of hydraulic cylinders 1, l are further included.
  • the hydraulic cylinder 1 has its body 1A fixed to shafts 1A which are-supported in bearing seat 5B, associated with bracket 5, and a semi-circular cover plate 5A of bracket 5 is fitted into the bearing seat 58, and the bracket and bearing seat are secured as with bolts.
  • the cylinder 1' has the body 18 thereof associated with the bracket 5 in a similar manner through shaft 1B.
  • Thebow-like members 2 are curved in shape along the curve of blade 3 so that contact of thebow-Iike members 2 with the cylindrical member 4 is avoided.
  • the shoulder 3C comprises cylindrical member 4 secured to the upper end of blade 3.
  • Blade 3 has front face 3A and back face 38 such that two way operations may be effected. These front and back sides 3A, 3B are curved, the sides of the blade 3 in section being downwardly convergent.
  • Shoulder 3C has lids 14, l4, and partition 24. Between partition 24 and lid 14 is disposed pin boss 24', into which pin 15 is inserted. The tip of pin 15 is engaged with fixing member 25 and pin boss 25'- which are arranged in cylindrical member 4. That is, cylindrical member 4 is rotatable about the support axis of pin 15.
  • the shoulder 36' and associated structure are of course similar.
  • blade 3 may be actuated by the hydraulic cylinders l, I mounted at both ends of cylindrical member 4 via bow-like member 2, and can rotate back and forth with its support axis determined by pins 15.
  • Blade 3 is thus subjected to three staged control.
  • Hydraulic cylinders are arranged such that they are in parallel with the center line of the frame 13 and can support the load of the blade 3.
  • the angled or upwardly extending portion of the frame 13 enables the hydraulic cylinders 18 to raise and lower the blade 3, meanwhile utilizing a relatively short stroke of the cylinders 18.
  • the hydraulic cylinders 7 are utilized.
  • the cylindrical member 4 rotates about hinge pin 10. This rotation is transmitted to the rod of the hydraulic cylinder 1, the bow-like member 2, and the blade member 3 to angle the blade 3.
  • theblade can tip an angle a forward and 5 backward and is freely displaceable between Y -Y or y -Y Support link 12 acts to prevent overload from being incurred on hinge pin 10 when vertical load is applied to the end of the blade 3 at the time of angling.
  • FIGS. 1 When a rod of one hydraulic cylinder 7 is extended, the cylindrical member 4 rotates about hinge pin 10. This rotation is transmitted to the rod of the hydraulic cylinder 1, the bow-like member 2, and the blade member 3 to angle the blade 3.
  • theblade can tip an angle a forward and 5 backward and is freely displaceable between Y -Y or y -Y Support link 12 acts to prevent overload from being incurred on hinge pin 10 when vertical load is applied to the end of the blade 3 at the time of angling.
  • a bulldozer having a blade-operating device comprising:
  • a semi-elliptical frame pivotally connected to and extending from the sides of the bulldozer, and having .an upwardly extending portion extending from the bulldozer, and a generally horizontal curved portion extending from the upwardly extending portron;
  • hydraulic cylinder means interconnecting the upwardly extending portion and the front sides of the bulldozer for raising and lowering the frame;
  • a hinge pin pivotally connecting the forward end of the curved portion of the frame with the first bracket
  • a first pair of hydraulic cylinders one end of one cylinder being pivotally connected to the second bracket and the other end being pivotally connected relative to the frame, one end of the other cylinder being pivotally connected to the third bracket and the other end being pivotally connected relative to the frame;
  • first and second pivot pins rotatably associated with the opposite ends of the cylindrical member respectively;
  • a rectangular blade rotatably supported relative to the cylindrical member by-means of the first and second pivot pins and adapted to be disposed along the opposite ends and the lower portion of the cylindrical member;
  • first and second bow-like members one end of each bow-like member being secured to the back side of the blade;
  • a second pair of hydraulic cylinders one end of one cylinder being pivotally connected relative to the cylindrical member and the other end being pivotally connected to the extended end of one of the bow-like members, one end of the other'cylinder being pivotally connected relative to the cylindrical member and the other end being pivotally connected to the extended end of the other bow-like member.
  • first and second pivot pins are disposed generally along the longitudinal axis of the cylindrical member, so that the blade is rotatable about such axis relative to the cylindrical member.

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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)
US00394123A 1972-09-08 1973-09-04 Two-way bulldozer Expired - Lifetime US3853181A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8956272A JPS531565B2 (no) 1972-09-08 1972-09-08

Publications (1)

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US3853181A true US3853181A (en) 1974-12-10

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US00394123A Expired - Lifetime US3853181A (en) 1972-09-08 1973-09-04 Two-way bulldozer

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JP (1) JPS531565B2 (no)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006782A (en) * 1975-04-04 1977-02-08 Caterpillar Mitsubishi Ltd. Two-way bulldozer mechanism
US4008771A (en) * 1974-08-21 1977-02-22 Caterpillar Mitsubishi Ltd. Two-way bulldozer mechanism
US4019587A (en) * 1976-05-17 1977-04-26 Caterpillar Tractor Co. Work vehicle having variable curvature blade assembly
US4860834A (en) * 1988-01-07 1989-08-29 Bidgood William E Converting assembly
US4986010A (en) * 1989-03-13 1991-01-22 Cartner Jack O Sloper apparatus
US5603172A (en) * 1994-11-14 1997-02-18 Maher; Richard J. Selectively reversible resilient plow blade and kit
US9624650B2 (en) 2015-05-05 2017-04-18 Caterpillar Inc. System and method for implement control

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891228A (ja) * 1981-11-20 1983-05-31 Caterpillar Mitsubishi Ltd ツ−ウエイド−ザ
JPS5891227A (ja) * 1981-11-20 1983-05-31 Caterpillar Mitsubishi Ltd ツ−ウエイド−ザ
JPH0742716B2 (ja) * 1987-10-27 1995-05-10 新キヤタピラー三菱株式会社 ツーウェイプレード装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147193A (en) * 1937-01-26 1939-02-14 Durr Emil Ditcher
US3234669A (en) * 1963-06-24 1966-02-15 Hendrickson Tandem Corp Mounting structure for adjustably supporting a scraper
US3631930A (en) * 1969-07-07 1972-01-04 Caterpillar Tractor Co Mounting arrangement for bulldozer blades
US3653451A (en) * 1970-01-09 1972-04-04 Caterpillar Tractor Co Tilt linkage for bulldozer blade mounting assemblies
US3674096A (en) * 1970-06-08 1972-07-04 Allis Chalmers Mfg Co Bulldozer blade mounting
US3690386A (en) * 1970-08-05 1972-09-12 Case Co J I Angle and tilt mechanism for dozer blade

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2147193A (en) * 1937-01-26 1939-02-14 Durr Emil Ditcher
US3234669A (en) * 1963-06-24 1966-02-15 Hendrickson Tandem Corp Mounting structure for adjustably supporting a scraper
US3631930A (en) * 1969-07-07 1972-01-04 Caterpillar Tractor Co Mounting arrangement for bulldozer blades
US3653451A (en) * 1970-01-09 1972-04-04 Caterpillar Tractor Co Tilt linkage for bulldozer blade mounting assemblies
US3674096A (en) * 1970-06-08 1972-07-04 Allis Chalmers Mfg Co Bulldozer blade mounting
US3690386A (en) * 1970-08-05 1972-09-12 Case Co J I Angle and tilt mechanism for dozer blade

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4008771A (en) * 1974-08-21 1977-02-22 Caterpillar Mitsubishi Ltd. Two-way bulldozer mechanism
US4006782A (en) * 1975-04-04 1977-02-08 Caterpillar Mitsubishi Ltd. Two-way bulldozer mechanism
US4019587A (en) * 1976-05-17 1977-04-26 Caterpillar Tractor Co. Work vehicle having variable curvature blade assembly
US4860834A (en) * 1988-01-07 1989-08-29 Bidgood William E Converting assembly
US4986010A (en) * 1989-03-13 1991-01-22 Cartner Jack O Sloper apparatus
US5603172A (en) * 1994-11-14 1997-02-18 Maher; Richard J. Selectively reversible resilient plow blade and kit
US9624650B2 (en) 2015-05-05 2017-04-18 Caterpillar Inc. System and method for implement control

Also Published As

Publication number Publication date
JPS531565B2 (no) 1978-01-20
JPS4945504A (no) 1974-05-01

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