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Publication numberUS3653451 A
Publication typeGrant
Publication dateApr 4, 1972
Filing dateJan 9, 1970
Priority dateJan 9, 1970
Also published asCA926118A, CA926118A1, DE2055543A1, DE2055543B2, DE2055543C3
Publication numberUS 3653451 A, US 3653451A, US-A-3653451, US3653451 A, US3653451A
InventorsFryrear Max D, Wilson Eugene M
Original AssigneeCaterpillar Tractor Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tilt linkage for bulldozer blade mounting assemblies
US 3653451 A
Abstract
A mounting assembly providing for tilt adjustment of a bulldozer blade. The blade is pivotally supported by a pair of push arms. Motor means are pivotally interconnected between the respective push arms and the blade for adjusting blade pitch with one of the motor means being connected with the blade by means of a pivotal link. The blade is tilted by additional motor means interconnected between the blade and the link.
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Description  (OCR text may contain errors)

United States Patent Fryrear et al. [45] Apr. 4, 1972 s41 TILT LINKAGE FOR BULLDOZER 3,222,804 12/1965 Kuhl ..172/80l x BLADE MOUNTING ASSEMBLIES 2,827,717 3/1958 Duke et a1. ..l72/803 2,869,256 1/1959 Pereira ..l72/803 [721 ggg g fi' 3,487,884 1/1970 Volberding ..l72/809 x [73] Assignee: Caterpillar Tractor Co., Peoria, [IL FOREIGN PATENTS OR APPLICATIONS 22 Jam 9 1970 799,180 8/1958 Great Britain ..l72/803 PP NOJ 1,623 Primary Examiner-Clyde l. Coughenour Attorney-Fryer, Tjensvold, Feix, Phillips & Lempio [52] U.S. Cl ..l72/804, 172/806, 172/809 511 Int. Cl. ..E02i 3/76 AB TR C [58] held of Search "172/ 801-807 A mounting assembly providing for tilt adjustment of a bull- 172,809 dozer blade. The blade is pivotally supported by a pair of push R f d arms. Motor means are pivotally interconnected between the e erences l e respective push arms and the blade for adjusting blade pitch UNITED STATES PATENTS with one of the motor means being connected with the blade I by means of a pivotal link. The blade is tilted by additional l Ull'lCh 1 X motor means interconnected between the blade and the 3,226,858 l/l966 Spannhake... 3,452,828 7/1969 Deli 11 Claims, 3 Drawing Figures INVENTORS MAX D. FRYREAR EUGENE M. WILSON 7D I MZWLI M m M I ATTORNEYS Patented April 4, 1972 3,653,451

2 Sheets-Sheet 2 INVENTORS MAX D. FRYREAR EUGENE M. WILSON TILT LINKAGE FOR BULLDOZER BLADE MOUNTING v ASSEMBLIES The present invention relates to bulldozer blade mounting assemblies, and more particularly to a mounting assembly including novel means for effectively adjusting blade tilt. In a preferred embodiment, the pivotal link means are associated with motor means for adjusting pitch of the blade and additional motor means are provided for adjusting elevation of the blade.

Numerous bulldozer blade mounting assemblies are known in the priorart which provide various combinations of pitch, tilt and elevation adjustment for the blade. However, a mounting assembly constructed in accordance with the present invention is believed to provide for adjustment of blade tilt in a particularly novel and effective manner.

Accordingly, it is an object of the present invention to provide a bulldozer blade mounting assembly including novel means for adjusting blade tilt.

It is a further object to provide such a mOunting assembly wherein the means for adjusting the blade tilt comprises pivotal link means which assist in establishing blade pitch together with means for positioning the pivotal link means and thereby adjusting blade tilt.

Additional objects and advantages of the present invention are made apparent in the following description having reference to the accompanying drawings.

IN THE DRAWINGS:

FIG. 1 is a plan view of a bulldozer blade supported at one end of a vehicle by a mounting assembly which embodies the present invention; and

FIGS. 2 and 3 are views taken respectively along section lines II-II and Ill-Ill of Fig. 1.

An embodiment of the present mounting assembly is indicated generally at 11 in the drawings for supporting a blade assembly 12 upon one end of a vehicle, a portion of which is indicated at 13. The vehicle shown in the drawings is of a type having .wheels such as those indicated at 14. However, it will be apparent that the mounting assembly of the present invention is also suitable for use with track type vehicles, for example.

Referring particularly to Fig. l, the blade 12 is secured to the vehicle by means of push arms 16 and 17 which are pivoted at 18 and 19 respectively to opposite sides of the vehicle. Brackets 21 and 22 extend rearwardly from blade 12 and are respectively secured to the push arms 16 and 17 by means of universal ball joints indicated at 23 and 24. Portions of the push arms 16 and 17 extend toward each other adjacent the blade 12 and are secured together by means of an articulated joint indicated at 26. A hydraulic motor 27 for raising and lowering the blade has its cylinder 28 secured to the vehicle by means of a trunnion mounting 29. A universal joint 31 secures the rd end 32 of the motor to a bifurcated bracket 33 which is fixed upon a central portion of the blade 12.

Hydraulic motors or jacks 41 and 42 are pivotally connected to the respective push arms 16 and 17 by the universal joints indicated at 43 and 44. The rod end 46 of the motor 41 is secured by means of a universal joint 47 to a bifurcated bracket. 48 extending rearwardly from an upper portion of the blade assembly 12. The other blade pitching motor 42 is also pivotally connected to the blade assembly 12 in a manner described in greater detail immediately below.

Having particular reference to Fig. 2 as well as Fig. 1, novel means within the present mounting assembly which provide for tilt adjustment of the blade are particularly embodied within pivotal link means. In the drawings, the pivotal link means are shown as comprising an elongated member such as that indicated at 51 in FIGS. 1 and 2. The link member 51 is pivotally secured to the blade assembly 12 as indicated at 52. The link member extends rearwardly from the pivot 52 toward the vehicle with its rearward end forming a bifurcated bracket 53 which may be best seen in Fig. l. The rod end 54 of the blade pitching motor 42 is secured to a rearward portion of the link member 51 by a universal joint indicated at 56.

As may be seen in Figs. 2 and 3, the blade pitching motors 41, 42 appear as members which extend upwardly and toward the blade from their pivotal connections with the push arms 16 and 17. Because of their interconnection with the push arms l6, l7 and the blade assembly 12, the motors 41, 42 provide triangular supports together with the bracket 48 and the link member 51 for establishing pitch of the blade assembly 12.

The present invention also provides means for positioning the link 51 and thereby changing the triangular relation of the motor 42, the push arm 17 and the blade assembly 12 to provide for tilt adjustment of the blade. The means for positioning the link member 51 is embodied within a motor or hydraulic jack 61 which is pivotally interconnected between the blade at 62 and a rearward portion of the link member 51 as indicated at 63. As may be best seen in Fig. 2, the motor 61 is arranged inperpendicular relation to the pivot axis 52 by which the link member 51 is secured to the blade. In this manner, the motor 6] may be extended or retracted to vary the triangular relations'hip of the blade pitching motor 42, the push arm 17 and the blade assembly 12.

To adjust the tilt position of the blade, the motor 61 may, for example, be retracted which results in the pivot 52 being urged further away from the pivot 44 and tends to increase the angular relation between the push arm 17 and an adjacent ortion of the blade assembly 12. The opposite end of the blade assembly 12 tends to remain in the same position because of the fixed triangular relationship between the blade pitching motor 41, the push arm 16 and the blade assembly 12. Thus, operation of the blade tilting motor 61 tends to cause stress within the blade and mounting assembly which tends to raise the right end of the blade, shown for example in Fig. 2 and toward the bottom of Fig. 1. Conversely, when the motor is extended, it tends to urge the pivot joint 52 toward the pivot 44 and similarly results in relative downward movement of the right end of the blade assembly.

We claim:

1. A mounting assembly for supporting a bulldozer blade at one end of a vehicle and providing adjustment of blade pitch and tilt, comprising 7 the vehicle,

a pair of push arms pivotally interconnected between opposite sides of the vehicle and blade,

extendible motor means pivotally interconnected between the respective push arms and the blade for adjusting blade pitch, one of the blade pitching motor means being pivotally connected with a rigid link which link is pivotally connected with the blade, and

means coupled with the link and the blade for adjusting its angular relation with the blade, said last recited means being arranged substantially perpendicularly to a pivot axis between the blade and the link.

2. The invention of claim 1 further comprising motor means effectively interconnected between the vehicle and blade for adjusting blade elevation.

3. The invention of claim 2 wherein the blade pitching motor means and the motor means effectively interconnected between the vehicle and blade are hydraulic jacks.

4. The invention of claim 1 wherein pivotal connections for the blade pitching motor means are universal pivot connections.

5. The invention of claim 1 wherein the means coupled with the link is a hydraulic jack.

6. The invention of claim 5 wherein the link is an elongated member extending generally toward the vehicle from its pivotal connection with the blade, the one blade pitching motor means and the jack between the link and blade being pivotally connected to a portion of the link remote from its pivotal connection with the blade.

7. The invention of claim 6 wherein the other blade pitching motor means is pivotally connected to a fixed bracket on the blade.

8. The invention of claim 6 wherein the blade pitching motor means are hydraulic jacks angled upwardly and forwardly along their respective push arms toward their pivotal connections with the blade, the jack interconnected between the link and blade being arranged generally vertically above one of the push arms.

9. A mounting assembly for supporting a bulldozer blade upon a vehicle, comprising a pair of push arms pivotally interconnected between the vehicle and blade,

a pair of members respectively pivoted to the push arms, the members angling upwardly and toward the blade along their respective push arms for pivotal connection with the blade, one of the members being pivotally connected with a rigid link which link is pivotally connected with the blade, and

means coupled with the link and the blade for adjusting the links position and varying the proximity of the pivotal connection between the one member and the link relative to the blade, said last recited means being arranged substantially perpendicularly to the pivot axis between the blade and link.

10. The invention of claim 9 wherein the means operatively associated with the link is a hydraulic jack pivotally interconnected between the link and the blade.

11. The invention of claim 10 wherein the members pivotally interconnected between the respective push arms and the blade are hydraulic jacks for adjusting pitch of the blade and further comprising additional motor means interconnected between the vehicle and the blade for adjusting elevation of the blade.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2827717 *Apr 15, 1955Mar 25, 1958Int Harvester CoHydraulically operated pitch and tilt dozer
US2869256 *Nov 8, 1954Jan 20, 1959Pereira Alfred RBulldozer blade tilting device
US3157099 *Sep 6, 1960Nov 17, 1964Ulrich Mfg CoEarth materials handling apparatus
US3222804 *Jan 14, 1964Dec 14, 1965Gen Motors CorpLift mechanism for dozer blade assembly
US3226858 *May 1, 1963Jan 4, 1966Raymond Int IncInertial mass, force multiplying device
US3452828 *Oct 10, 1966Jul 1, 1969Int Harvester CoBulldozer tiltable blade mounting
US3487884 *Feb 17, 1969Jan 6, 1970Volberding HenryBulldozer assembly
GB799180A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3853181 *Sep 4, 1973Dec 10, 1974Caterpillar Mitsubishi LtdTwo-way bulldozer
US3974882 *Nov 26, 1975Aug 17, 1976Caterpillar Tractor Co.Cellular bulldozer blade with built-in support brackets
US3998277 *Oct 30, 1975Dec 21, 1976Caterpillar Tractor Co.Bulldozer assembly with means for pivotally connecting the push arms thereof
US4019588 *Jun 30, 1975Apr 26, 1977Caterpillar Tractor Co.Tilting means for bulldozer blades
US4044843 *Apr 22, 1976Aug 30, 1977Arnold Emeral HolubTractor-mounted scraper
US4189010 *Jan 27, 1978Feb 19, 1980Caterpillar Tractor Co.Power angling bulldozer assembly
US4220210 *Oct 31, 1977Sep 2, 1980Degelman Industries Ltd.Tractor front supported implement attachment frame
US4281721 *Dec 12, 1978Aug 4, 1981Beales Steel Products Ltd.Bulldozer blade mounting assembly
US4541493 *Jun 28, 1984Sep 17, 1985Clark Equipment CompanyBulldozer tilt mechanism
US5069296 *Jun 5, 1990Dec 3, 1991Case CorporationPitch/tilt dozer
US5181574 *Dec 4, 1991Jan 26, 1993Fernand DionScraper blade mount for bulldozer
US5403144 *Apr 23, 1993Apr 4, 1995Staben, Jr.; Frank P.Blade tilt assembly for a front end loader
US6059048 *Feb 4, 1999May 9, 2000Caterpillar Inc.Implement mounting arrangement with independent lift-roll and pitch-yaw operability
EP0244125A1 *Apr 15, 1987Nov 4, 1987Vickers Public Limited CompanyBlade-like attachment for armoured vehicles
Classifications
U.S. Classification172/824, 172/830
International ClassificationE02F3/76, E02F3/00, B23Q3/00, E02F, F16H
Cooperative ClassificationE02F3/7618
European ClassificationE02F3/76B4
Legal Events
DateCodeEventDescription
Jun 12, 1986ASAssignment
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