US3763938A - Suspension for a ploughshare assembly of a grading machine - Google Patents

Suspension for a ploughshare assembly of a grading machine Download PDF

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Publication number
US3763938A
US3763938A US00231173A US3763938DA US3763938A US 3763938 A US3763938 A US 3763938A US 00231173 A US00231173 A US 00231173A US 3763938D A US3763938D A US 3763938DA US 3763938 A US3763938 A US 3763938A
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United States
Prior art keywords
frame
supporting member
machine
suspension body
cylinders
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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
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US00231173A
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English (en)
Inventor
H Brodersen
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.)
Maschinenbau Ulm dt GmbH
Ulm Maschbau GmbH
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Ulm Maschbau GmbH
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Publication date
Application filed by Ulm Maschbau GmbH filed Critical Ulm Maschbau GmbH
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Publication of US3763938A publication Critical patent/US3763938A/en
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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
    • E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
    • E02F3/764—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a vertical axis

Definitions

  • ABSTRACT A soil tilling machine comprising a ploughshare assembly supported on a supporting member between 1 the wheel axles for rotation, and capable of being locked in an adjusted angular position in relation to the longitudinal axis of the machine.
  • the supporting member is pivotally attached at its front end to a frame of the machine so as to be capable of being adjusted in elevation and in lateral tilted position by 7 means of hydraulic cylinders which are connected to the free rear end of the supporting; member at laterally offset sides thereof and to a suspension body which is longitudinally displaceable on the frame.
  • the invention relates to a suspension for a ploughshare assembly of a soil tilling and levelling machine constituted as a grader.
  • Prior Art It is known to support the ploughshare assembly between the axles of a grader on a supporting arm such that the ploughshare assembly is rotatable and capable of being fixed in adjustable angular positions in relation to the longitudinal axis of the grader.
  • the supporting arm is rotatably attached, preferably at the front end of the girder or frame of the grader, by means of a joint, and is capable of being adjusted, as regards elevation and lateral position, by means of hydraulic cylinders which are connected to the free end of the supporting arm and are attached to the girder on mutually opposite sides thereof.
  • the versatility of utilization of such graders and the quality of the surfaces produced thereby are to a large degree determined by the accuracy and the multiplicity of the possibilities of adjustment of the ploughshare assembly.
  • the lateral and elevational adjustments of the ploughshare assembly are accomplished by means of hydraulic cylinders which are arranged on both sides of the girder, each of said cylinders engaging one side of the free end of the supporting arm, which supports the ploughshare assembly.
  • the hydraulic cylinders must have a very long stroke and, consequently, they project on both sides of the girder considerably in the upward direction.
  • transverse girders which is attached to the longitudinal girder of the grader.
  • the transverse girders of conventional embodiments are tilted about the longitudinal girders by appropriate means, in such a manner that the points of attachment travel along a circular or elliptical path about the girder, so that the points of attachment are located above or below the girder.
  • the magnitude and awkwardness of the tiltable transverse girder as well as the point of attachment also impair the range of vision of the operator.
  • a suspension and adjustment device which, moreover is compact and is located at such a point of the grader and the girder thereof, which results in the best possible conditions of vision.
  • a suspension for a ploughshare of the above mentioned kind in a grader in which hydraulic cylinders are pivotably attached to a suspension body which is displaceable in the direction of the longitudinal axis of the grader and is adjustably fixable in position, said suspension body being attached to the girder or to the body of the grader.
  • This construction of the suspension permits the use of relatively small hydraulic cylinders for actuation of the ploughshare, said cylinders having short strokes, i.e. shorter than would be necessary for the entire displacement of the ploughshare assembly itself, since at least a portion of the adjustment of the elevation of the ploughshare assembly is achieved by a horizontal movement of the suspension body.
  • the suspension is so constructed that no suspension or adjustment devices project above the girder of the grader, so that the visibility of the operator is not impaired. Movement of the suspension body along the longitudinal girder in the directionof the supporting member attached at the front end of the girder, results in lifting of the free end of the supporting member which supports the ploughshare assembly.
  • the suspension body is supported in a guide on the girder or frame of the grader, the suspension body is displaceable and adjustable therein by means of a adjustment device which is located between the suspension body and the girder and extends approximately in the longitudinal direction of the girder.
  • the adjustment device is constructed as a hydraulic cylinder attached to the suspension body and to the girder.
  • a particularly advantageous embodiment, which is free of undesirable tilting moments is obtained by connecting the hydraulic cylinders, which are attached to the supporting member on both sides of the longitudi nal axis of the machine, to the suspension body in a common swivel joint, the hydraulic cylinders thereby forming the lateral sides of a triangle extending transversely of the longitudinal axis of the machine, the base of the triangle being formed by the free end of the supporting member.
  • the inclination of the ploughshare assembly transversely to the longitudinal axis of the machine is achieved by differential extension of the hydraulic cylinders attached to the support member.
  • the adjustment of the elevational position of the ploughshare assembly is achieved on the one hand by symmetrical extension or retraction of the hydraulic cylinders and, on the other hand, by the longitudinal adjustment of the position of the suspension body in relation to the girder.
  • an additional cylinder is connected between the free end of the supporting member, which supports the ploughshare assembly, and the frame of the machine, extending transversely to the hydraulic cylinders attached to the suspension body, said additional cylinder being mounted in universal joints at its end attached to the supporting member as well as at its end attached to the frame of the machine.
  • the additional cylinder has a stabilizing function. lts point of attachment to the frame is advantageously displaceable and adjustable in a direction perpendicular to the longitudinal axis of the grader.
  • FIG. 1 is a diagrammatic side elevation view of a grading machine in which the suspension of the ploughshare assembly is according to the invention.
  • FIG. 2 is a top plan view of the machine.
  • a grader having a frame whose central part between the axles carrying front steerable wheels 1 and rear wheels 2 is constituted as a bridge girder 3.
  • a suspension device for additional working tools e.g. a shield or blade 5 for earth moving operations.
  • a driving motor (not shown) and a cabin 7 for an operator.
  • a levelling ploughshare assembly 8 with the suspension according to the invention.
  • a supporting member 9 which is triangular in outline in top plan view and which supports the ploughshare assembly 8 is suspended in a ball-and-socket joint 11 at the front portion 10 of the frame.
  • the member 9 is pivotable in joint 11 about a transverse axis so as to be pivotable in an up and down manner in a vertical plane passing through the longitudinal axis of the grader, the member 9 also being pivotable in joint 11 about the longitudinal axis so as to be laterally tiltable.
  • the member is provided in the region of its free rear end 12 (the base of the triangle) with a rotatable ring 13, to which the ploughshare assembly 8 is fastened. By rotation of ring 13 in lockable clamps 1311 (one being visible in FIG.
  • the horizontal angular position of assembly 8 can be adjusted in relation to the longitudinal axis of the grader.
  • hydraulic cylinders 14, 15 At the free end 12 of the supporting member 9, approximately in the region of the vertices of the triangle, there are attached hydraulic cylinders 14, 15 by means of ball-and-socket joints.
  • the hydraulic cylinders are attached at their other ends to a suspension body 16 by means of ball-and-socket joints.
  • the suspension body 16 is located just below the lower surface of the girder 3 and it is guidably displaceable in the longitudinal direction of the girder (along the central axis of the grader), by means of a guide 16a.
  • the adjustment of the position of suspension body 16 in the longitudinal direction of the grader is effected by an adjusting device, which comprises a hydraulic adjustment cylinder 17.
  • a hydraulic adjustment cylinder 17 For stabilization of the supporting member 9 with the ploughshare assembly in its various positions, a further hydraulic cylinder 18 is provided, the cylinder 18 having one of its ends attached to the free end 12 of the supporting member 9 and its other end attached at 19 to the frame 6.
  • the point of support 19 in the frame 6 is adjustable in the directions of the arrows 20 in FIG. 2, so that allowance can be made for various requirements. A continuous readjustment capability of the point of support 19 is not necessarily required.
  • the hydraulic cylinders 14, 15 position the member 9 as regards its angular attitude relative to both the longitudinal and transverse axes passing through joint 11.
  • the ploughshare assembly can be given an angle of inclination in the vertical direction up to a substantially vertical position of the ploughshare assembly 8.
  • the hydraulic cylinders 14 and 15 are attached to the suspension body 16 in such a manner that the application of force from both cylinders occurs substantially at the same point on the suspension body.
  • the lifting and lowering operations of the supporting member 9, and thereby of the ploughshare assembly 8, can be accomplished, on the one hand, by synchronized extension of the hydraulic cylinders 14 and 15 causing displacement of the suspension body 16 in the longitudinal direction of the grading machine.
  • FIG. 1 There is shown in FIG. 1 in broken lines position 16 of the suspension body.
  • the supporting member 9 is lifted to the position 9' shown in broken lines.
  • the adjustment of the ploughshare assembly 8 is, in general, achieved solely by the hydraulic cylinders 14, 15 and 17, the latter serving as a readjustment device for the suspension body 16.
  • the hydraulic cylinder 18 serves in general the purpose of stabilized fixation of the assembly.
  • a soil tilling machine having a frame with a longitudinal axis, and front and rear axles with wheels thereon supported from the frame, said machine comprising a supporting member having a front end pivotably connected to the frame,a free rear end which can be moved up and down and tilted laterally when the supporting member is pivotably moved about the frame, a ploughshare assembly supported by said supporting member at a location between the axles, a pair of hydraulic cylinders pivotably connected to the supporting member at transversely offset locations to tilt the supporting member and the ploughshare assembly therewith when the cylinders are operated differentially and to raise and lower the free rear end of the supporting member when the cylinders are operated in synchronism, a suspension body, and means supporting the suspension body from the frame for longitudinal movement with respect to said frame, said cylinders being pivotably coupled to said suspension body.
  • a machine as claimed in claim 1 comprising adjustment means connected to said suspension body and said frame for providing longitudinal displacement of the suspension body.
  • a machine as claimed in claim 2 wherein said adjustment means comprises a hydraulic cylinder oriented in the longitudinal directionof the frame.
  • a machine as claimed in claim 2 comprising a common pivot connecting said cylinders to said suspension body.
  • said supporting member is of triangular shape with side arms connected together at said front end and diverting rearwardly, and a transverse member connected to said side arms to form the base of the triangular member.
  • a machine as claimed in claim 7 comprising a further hydraulic cylinder connected to said frame and said supporting member.
  • a machine as claimed in claim 8 wherein said further hydraulic cylinder is connected to the supporting member at the rear end thereof and extends transversely with respect to said pair of hydraulic cylinders,
  • said further hydraulic cylinder being connected to said frame and the supporting member by respective universal joints.
  • a machine as claimed in claim 9 comprising means attaching the further hydraulic cylinder to the frame for adjustment in a direction perpendicular to the longitudinal axis of the frame.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Soil Working Implements (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)
  • Vehicle Body Suspensions (AREA)
US00231173A 1971-03-03 1972-03-02 Suspension for a ploughshare assembly of a grading machine Expired - Lifetime US3763938A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2110200A DE2110200C3 (de) 1971-03-03 1971-03-03 Planierhobel

Publications (1)

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US3763938A true US3763938A (en) 1973-10-09

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Family Applications (1)

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US00231173A Expired - Lifetime US3763938A (en) 1971-03-03 1972-03-02 Suspension for a ploughshare assembly of a grading machine

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US (1) US3763938A (de)
DE (1) DE2110200C3 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213507A (en) * 1976-10-23 1980-07-22 Erwin Horrer Grading vehicle
US5529131A (en) * 1995-09-28 1996-06-25 Van Ornum; Leslie G. Grading attachment
US6230818B1 (en) * 1999-07-20 2001-05-15 Caterpillar, Inc. Adjustable drawbar and circle support assembly for a motor grader
US20060113095A1 (en) * 2004-11-29 2006-06-01 Deere & Company, A Delaware Corporation. Load based suspension motion limiting
US20060113749A1 (en) * 2004-11-29 2006-06-01 Deere & Company, A Delaware Corporation. Articulated dozer with frame structure for decreased height variation in the vehicle chassis
US20060124380A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Direct load path structure
US20060124329A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Dynamic blade distance ratio system and method
US20060123670A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Blade motion reduction
US7584812B2 (en) 2004-11-29 2009-09-08 Deere & Company Articulated dozer with suspension and suspension lockout
US20190322506A1 (en) * 2018-03-14 2019-10-24 Tim Ourada All Terrain Versatile Telescopic Fork Lift

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1769682A (en) * 1928-07-28 1930-07-01 Ryan Mnfg Corp Road grader
US3677350A (en) * 1970-11-02 1972-07-18 Caterpillar Tractor Co Hydraulic motor grader blade lift, centershift control

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1769682A (en) * 1928-07-28 1930-07-01 Ryan Mnfg Corp Road grader
US3677350A (en) * 1970-11-02 1972-07-18 Caterpillar Tractor Co Hydraulic motor grader blade lift, centershift control

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4213507A (en) * 1976-10-23 1980-07-22 Erwin Horrer Grading vehicle
US5529131A (en) * 1995-09-28 1996-06-25 Van Ornum; Leslie G. Grading attachment
US6230818B1 (en) * 1999-07-20 2001-05-15 Caterpillar, Inc. Adjustable drawbar and circle support assembly for a motor grader
US20060113095A1 (en) * 2004-11-29 2006-06-01 Deere & Company, A Delaware Corporation. Load based suspension motion limiting
US20060113749A1 (en) * 2004-11-29 2006-06-01 Deere & Company, A Delaware Corporation. Articulated dozer with frame structure for decreased height variation in the vehicle chassis
US20060124380A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Direct load path structure
US20060124329A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Dynamic blade distance ratio system and method
US20060123670A1 (en) * 2004-11-29 2006-06-15 Deere & Company, A Delaware Corporation. Blade motion reduction
US7192034B2 (en) 2004-11-29 2007-03-20 Deere & Company Load based suspension motion limiting
US7451840B2 (en) 2004-11-29 2008-11-18 Deere & Company Articulated crawler dozer with direct load path structure
US7503411B2 (en) 2004-11-29 2009-03-17 Deere & Company Articulated dozer with frame structure for decreased height variation in the vehicle chassis
US7581598B2 (en) 2004-11-29 2009-09-01 Deere & Company Blade motion reduction
US7584812B2 (en) 2004-11-29 2009-09-08 Deere & Company Articulated dozer with suspension and suspension lockout
US7641007B2 (en) 2004-11-29 2010-01-05 Deere & Company Dynamic blade distance ratio system and method
US20190322506A1 (en) * 2018-03-14 2019-10-24 Tim Ourada All Terrain Versatile Telescopic Fork Lift
US10807847B2 (en) * 2018-03-14 2020-10-20 Teletrax Equipment, Llc All terrain versatile telescopic fork lift

Also Published As

Publication number Publication date
DE2110200C3 (de) 1974-01-31
DE2110200A1 (de) 1972-09-14
DE2110200B2 (de) 1973-07-05

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