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EP3623532A1 - Appareil de contournement du sol comportant des accessoires montés - Google Patents

Appareil de contournement du sol comportant des accessoires montés Download PDF

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Publication number
EP3623532A1
EP3623532A1 EP19197206.6A EP19197206A EP3623532A1 EP 3623532 A1 EP3623532 A1 EP 3623532A1 EP 19197206 A EP19197206 A EP 19197206A EP 3623532 A1 EP3623532 A1 EP 3623532A1
Authority
EP
European Patent Office
Prior art keywords
ground
accessory
assembly
body portion
ground modifying
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.)
Withdrawn
Application number
EP19197206.6A
Other languages
German (de)
English (en)
Inventor
Rodney Warwick Sharp
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.)
Progressive IP Ltd
Original Assignee
Progressive IP 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
Priority claimed from US16/130,446 external-priority patent/US10676894B2/en
Application filed by Progressive IP Ltd filed Critical Progressive IP Ltd
Publication of EP3623532A1 publication Critical patent/EP3623532A1/fr
Withdrawn legal-status Critical Current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
    • E02F3/7663—Graders with the scraper blade mounted under a frame supported by wheels, 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
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E02F3/845—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using mechanical sensors to determine the blade position, e.g. inclinometers, gyroscopes, pendulums
    • 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
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
    • 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
    • E02F3/7663—Graders with the scraper blade mounted under a frame supported by wheels, or the like
    • E02F3/7668—Graders with the scraper blade mounted under a frame supported by wheels, or the like with the scraper blade being pivotable about a vertical 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
    • E02F3/7663—Graders with the scraper blade mounted under a frame supported by wheels, or the like
    • E02F3/7672—Graders with the scraper blade mounted under a frame supported by wheels, or the like with the scraper blade being pivotable about a horizontal axis disposed parallel to the blade
    • 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
    • E02F3/7663—Graders with the scraper blade mounted under a frame supported by wheels, or the like
    • E02F3/7677—Graders with the scraper blade mounted under a frame supported by wheels, or the like with the scraper blade being pivotable about a horizontal axis disposed perpendicular to the blade
    • 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
    • E02F3/8155—Blades; Levelling or scarifying tools provided with movable parts, e.g. cutting discs, vibrating teeth 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
    • E02F3/80—Component parts
    • E02F3/84—Drives or control devices therefor, e.g. hydraulic drive systems
    • E02F3/844—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically
    • E02F3/847—Drives or control devices therefor, e.g. hydraulic drive systems for positioning the blade, e.g. hydraulically using electromagnetic, optical or acoustic beams to determine the blade position, e.g. laser beams
    • 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
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/962—Mounting of implements directly on tools already attached to the machine
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/26—Indicating devices
    • E02F9/264—Sensors and their calibration for indicating the position of the work tool
    • E02F9/265—Sensors and their calibration for indicating the position of the work tool with follow-up actions (e.g. control signals sent to actuate the work tool)

Definitions

  • the present invention is directed to ground modifying apparatus of a type sometimes known as levellers, typically as used on tractors and skid-steer vehicles. In current practice these are used for preparing, levelling, and contouring the ground.
  • levellers will include a forward wheeled carriage to assist in levelling operations, and which may be fixed or able to fold upwardly when not needed.
  • One of the problems encountered in the art is a swinging pendulum motion of the wheels/carriage when the tractor and attachment is reversed. This motion can disturb the ground/surface which has just been levelled or graded. It can also place significant stress forces on the wheels/carriage and has been known to rip off wheels and carriage components in practice.
  • the present invention relates to levellers, a device typically attached to tractors, excavators, and skid-steer vehicles for the purpose of levelling and smoothing the ground. It is envisaged however that the present invention may find other uses, and be adapted therefore.
  • levelling devices such as disclosed in US Patent 10,323,382 . For simplicity, at least part of the present invention will be described with reference to levellers such as described in this publication, as setting part of the background for the inventions herein.
  • Levellers as they are often known, take many shapes and designs, including those which are merely dragged along the ground. Many, however, have blades (sometimes known as, or part of, mould boards) for levelling and altering the contour of the ground. In these versions, the height of the blade is typically able to be altered, which allows the user control over grading, levelling and/or sculpting the contour of the ground. Elevation adjustment is sometimes achieved by raising the entire ground contouring assembly, while others may rely on merely raising and lowering the portion with the blade.
  • One prior art device uses a central hydraulic actuator to raise and lower the blade portion, which is connected to the main body portion with two dual parallel arm linkages. A wheeled carriage extending from the main body portion helps keep the main body portion at a constant height relative to the ground.
  • leveller attachment arrangements typically the ubiquitous Quick-Hitch
  • leveller attachment arrangements which include an arrangement for varying the inclination of the attachment.
  • These rotational arrangements are expensive, and also add considerable weight to the load carried by the tractor unit. They are also limited in the degree of precision with respect to inclination to a particular angle, and relatively slow to adjust. This slows any levelling operation.
  • the inventor has identified a need for a levelling unit, which can address the above issues, and at least provide a blade portion able to be adjusted in elevation, and inclination (about a rotational axis substantially the same as the direction of travel), and which can be attached to standard connections such as the Quick Hitch, while avoiding the use of additional rotational assemblies.
  • ground preparation work needs to be performed before levelling and grading can occur.
  • this involves working the ground/site with a different implement.
  • something such as what is commonly known as a "Harley Rake” may be used, which is essentially a powered rotating drum rake.
  • the radially protruding tines on the powered rotating rake penetrate through the upper layer of the ground, to effectively break up thatch, matted plant material, compacted soil, and even light man made surface coverings such as bitumen (depending on the design of the drum). Without this prior treatment the blade tends to skid across the surface of the ground.
  • a fixed rake i.e. not a powered rotating rake
  • downward ground penetrating tines may be used to break up harder ground, or where foreign objects which may damage a Harley rake may be present.
  • This solution is more likely to be used on old construction and demolition sites, or where harder man-made coverings of asphalt and bitumen may be present.
  • preparing the ground prior to subsequent operation with a blade assembly allows more effective levelling to be performed.
  • the problem with the prior art techniques is that the ground must be worked more than once - first with a ground preparing tool, and then the levelling/contouring operation. If the operator has two machines, then one can be preparing the ground while the leveller follows.
  • the disadvantages of these techniques is the extra cost for more tools, the extra time of multiple operations, and the extra cost if more than one tractor is used. To the industry these represent significant disadvantages in terms of time and capital expense. It would therefore be a significant advantage to the ground-working and construction industries if these disadvantages could at least be partially addressed. It would be useful to the industry also if an option to allow the use of a ground modifying accessory with a blade was available. It would also be useful if an option existed which could readily allow the engagement and disengagement of such a ground modifying accessory.
  • levelling type attachments As the applications of levelling type attachments grow in the art, new problems arise or existing issues exacerbated.
  • levellers are increasingly used for site levelling, grading and final ground preparation applications - at least partly due to the manoeuvrability of skid-steer type mounted combinations - problems with disturbing the finished surface become more problematic as the vehicle and attachment combination are reversed.
  • the main identified issue is that when the combination is reversed, the leading pivoted wheels/carriage (which now become trailing wheels/carriage) start swinging about the pivot, sometimes in a pendulum type effect, and start digging into the ground and undoing the recently completed finishing work. This becomes a real problem as often the only way for the tractor and attachment combination to exit an area is by reversing.
  • ground levelling equipment such as described above, has lead to their use in more applications - especially within construction, road, and landscaping industries.
  • These new applications continually raise new issues, particularly regarding stability, manoeuvrability, and the use of accessories other than (or as well as) blade; the need for lighter and less expensive equipment which can be fitted to a greater range of vehicles (with differing capacities) also represents a growing need and want.
  • This addresses not only the desire to mount levellers on vehicles with lower capacity, but a need for less expensive alternatives, and lighter frames to compensate for the mounting of ground modifying accessories other than (or as well as) blades.
  • a ground contouring assembly comprising a body mounting portion and an accessory body portion; said two body portions being connected by body connecting linkages which allow a substantially up and down vertical movement of the accessory body portion, relative to the body mounting portion, and in which the inclination of a ground modifying accessory associated with the accessory body portion remains substantially the same regardless of its vertical position; the body connecting linkages also allowing a rotational movement of the accessory body portion, relative to the body attachment portion, about a rotational axis substantially perpendicular to a vertical plane passing lengthwise along said ground modifying accessory; said body connecting linkages including linear actuators, there being at least one being present either side of the middle of the ground contouring assembly when viewed in plan; said body connecting linkages also including at least one pivot-ended stabilising linkage either side of the middle of the ground contouring assembly when viewed in plan; and wherein the body connecting linkages assist in maintaining relative movement of the body portions to within the rotational and vertical movements as defined above; the ground contouring assembly being further characterised by
  • a ground contouring assembly substantially as described above, in which the ground modifying accessory comprises a blade.
  • a ground contouring assembly substantially as described above, in which there is provided vertical side guards positioned either side of the blade portion and extending forwardly thereof.
  • a ground contouring assembly substantially as described above, wherein said rotatable accessory mounting portion extends between said vertical side guards and are mounted thereto.
  • a ground contouring assembly substantially as described above, in which said mount rotation means is capable of alternating the accessory mounting portion, with attached assembly, between at least accessory retracted, and accessory engaged, positions.
  • a ground contouring assembly substantially as described above, in which said mount rotation means comprises a linear actuator pivotably connected at one end to said transverse accessory mount, and to the accessory body portion at its distal end.
  • a ground contouring assembly substantially as described above, in which the mount rotation means is able to be engaged in a free mode, allowing substantially free rotation of the accessory when in an accessory engaged mode.
  • a ground contouring assembly substantially as described above, in which affixed to said rotatable accessory mounting portion is a rotatable drum assembly.
  • a ground contouring assembly substantially as described above, in which said rotatable drum assembly comprise drum side mounts to which a rotatable drum portion is connected, said drum side mounts connected to said transverse accessory mount and configured to act in conjunction with same to allow the arrangement to alternate between an accessory retracted position in which said rotatable drum portion is above the ground, as well as the level of the lowest edge of the blade assembly, and an accessory engaged position in which the drum is contactable, or in proximity, with the ground.
  • a ground contouring assembly substantially as described above, in which said rotatable drum assembly includes drum power means for effecting powered rotation of said rotatable drum portion.
  • a ground contouring assembly substantially as described above, in which said drum power means is positioned within the body of the drum.
  • a ground contouring assembly substantially as described above, in which said drum power means comprises an inboard hydraulic motor positioned either end within the body of the drum.
  • a ground contouring assembly substantially as described above, in which affixed or attachable to said rotatable accessory mounting portion is scarifier assembly.
  • a ground contouring assembly substantially as described above, in which said scarifier assembly comprises one or more scarifier modules comprising a plurality of tines.
  • a ground contouring assembly substantially as described above, in which the tips of said tines can interact with the ground when in an accessory engaged position.
  • a ground contouring assembly substantially as described above, in which the arrangement of the transverse accessory mount and said scarifier modules is such that at least part of a scarifier module can bear against a scarifier support portion to its rear during operation in an accessory engaged mode.
  • a ground contouring assembly substantially as described above, in which said scarifier support portion comprises either or both of the mouldboard portion and blade portion.
  • a multi-adjustable ground contouring assembly for mounting to a vehicle comprising a body mounting portion and an accessory body portion;
  • a multi-adjustable ground contouring assembly for mounting to a vehicle, substantially as described above, in which said adjustable length actuators are hydraulically operated.
  • a multi-adjustable ground contouring assembly for mounting to a vehicle, substantially as described above, in which said first and second sets of connecting linkages being further characterised by:
  • a multi-adjustable ground contouring assembly for mounting to a vehicle, substantially as described above, in which the arrangement is further characterised in that the first and second linkage arrangements allow for both vertical raising, and rotation about an axis normal to the general plane of the accessory body portion, while maintaining substantially the same forward inclination of the accessory body portion, relative to the body mounting portion.
  • a ground contouring assembly substantially as described above, in which there are provided a set of two body connecting linkages, comprising linear actuators, either side of the middle of the ground contouring assembly when viewed in plan.
  • a ground contouring assembly substantially as described above, in which the connection point of the linear actuators of each set to the body mounting portion are vertically displaced relative to each other when the ground contouring assembly is viewed from the side.
  • a ground contouring assembly substantially as described above, in which the connection point of the linear actuators of each set to the blade mounting portion are vertically displaced relative to each other when the ground contouring assembly is viewed from the side.
  • a ground contouring assembly substantially as described above, in which a pivot-ended stabilising linkage extends diagonally between the two body portions when the ground contouring assembly is viewed in plan.
  • a ground contouring assembly substantially as described above, in which pivot-ended stabilising linkages extending either side of the middle of the ground contouring assembly when viewed in plan, connect to the accessory body portion at a point near its middle when viewed in plan.
  • a pivot-ended stabilising linkage includes a ball joint at least one end.
  • a ground contouring assembly substantially as described above, in which the ball joint includes a spherical resilient bush.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, there is at least one pivot-ended stabilising linkage extending substantially perpendicular to the aforesaid permitted plane of relative movement of the blade portion, and located at a position outwardly of the middle of the ground contouring assembly when viewed in plan.
  • a ground contouring assembly substantially as described above, in which there is a substantially symmetrical distribution of pivot-ended stabilising linkages either side of the middle of the ground contouring assembly, when viewed in plan.
  • a ground contouring assembly substantially as described above, in which a said linear actuator is hydraulically operated.
  • a ground contouring assembly substantially as described above, in which the accessory body portion includes at least one stabilising wheel.
  • a ground contouring assembly substantially as described above, in which a said stabilising wheel is alternable between operational and non-operational configurations.
  • a ground contouring assembly substantially as described above, in which the body mounting portion is attachable to a vehicle.
  • a ground contouring assembly substantially as described above, in which the vehicle is a skid-steer vehicle, an excavator, or a tracked vehicle.
  • a ground contouring assembly substantially as described above, in which the body mounting portion attaches by a quick hitch mounting system.
  • a ground contouring assembly substantially as described above, in which the body mounting portion attaches to an existing blade mounted on said vehicle.
  • a ground contouring assembly substantially as described above, which includes at least one top hook assembly and one bottom hook assembly, for hooking over the top and bottom respectively of an existing blade on a vehicle.
  • a ground contouring assembly substantially as described above, in which either or both of the top and bottom hook assemblies contain more than one hook element for hooking over the top or bottom respectively of an existing blade on a vehicle.
  • a ground contouring assembly substantially as described above, in which either or both the top and bottom hook assemblies can be tightened for drawing the ground contouring assembly tightly against a said existing blade on a vehicle for mounting thereto, and can be released or relaxed for dismounting therefrom.
  • a ground contouring assembly substantially as described above, in which at least one of said hook assemblies affixes to a point of the accessory body portion of the ground contouring assembly.
  • a ground contouring assembly substantially as described above, when affixed to a vehicle.
  • a ground contouring assembly substantially as described above, in which said linear actuators controlling relevant movement of said accessory body portion are controlled by a control arrangement coupled to a laser assisted guidance system.
  • a ground modifying assembly with a ground modifying accessory, which also has a forward wheel portion,
  • a ground modifying assembly substantially as described above wherein the ground modifying accessory comprises a blade or mouldboard.
  • a ground modifying assembly substantially as described above wherein the ground modifying assembly incorporates the features of a ground contouring assembly substantially as described above.
  • a ground modifying assembly substantially as described above wherein the arrangement of carriage pivot portion with carriage body portion allows the elevation of said wheels, from the ground or surface being worked, to alter.
  • a ground modifying assembly substantially as described above wherein said wheels are attached to the carriage body portion by a trailing wheel arrangement.
  • a ground contouring assembly substantially as described above, when used for ground levelling operations.
  • a ground contouring assembly comprising a body attachment portion and an accessory body portion; the two body portions being connected by body connecting linkages which allow a substantially translational movement of the accessory body portion, substantially within a translational plane, relative to the accessory body portion; said body connecting linkages including linear actuators, there being at least one being present either side of the middle of the ground contouring assembly when viewed in plan; and wherein the body connecting linkages assist in maintaining relative movement of the body portions to as described above, and which includes a stabilising wheel arrangement on an arm arrangement extending from the body attachment portion.
  • a ground contouring assembly substantially as described in the preceding paragraph, in which the arm arrangement has a pivotable connection allowing the portion on which the stabilising wheel arrangement to pivot upwardly so the stabilising wheel arrangement clears the ground.
  • a ground contouring assembly substantially as described in the preceding two paragraphs, in which the arm arrangement has a pivotable connection allowing the portion on which the stabilising wheel arrangement to pivot upwardly so the stabilising wheel arrangement is positionable substantially over the blade portion.
  • ground contouring assembly substantially as described above, which includes an excavator attachment means.
  • ground contouring assembly substantially as described above, which includes an upwardly extending mount portion from the body attachment portion, and an excavator quick hitch adaptor connected thereto.
  • ground contouring assembly substantially as described above, in which the excavator quick hitch adaptor is pivotably connected to the upwardly extending mount portion.
  • a ground contouring assembly comprising a front accessory body portion, and a rear body portion, the two body portions connected to each other by at least four body connecting linkages, said body connecting linkages, in plan view, being distributed either side of a vertical longitudinal centre-plane bisecting said two body portions, said body connecting linkages including pivotable linkage connections to said body portions to allow, when viewed from the side, the elevation to the two body portions to alter.
  • a ground contouring assembly substantially as described above, in which a pivotable linkage connection allows at least limited pivotable movement about at least one axis.
  • a ground contouring assembly substantially as described above, in which a pivotable linkage connection allows at least limited effective pivotable movement about multiple axes.
  • a ground contouring assembly substantially as described above, in which said body connecting linkages are arranged into two linkage sets, a left linkage set to the left of said longitudinal centre plane, and a right linkage set to the right of said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which said left and right linkage sets are approximately equidistant from said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which, in a linkage set, one linkage is positioned higher in elevation than the other.
  • a ground contouring assembly substantially as described above, in which, in a linkage set, the linkages are within thirty degrees of each other.
  • a ground contouring assembly substantially as described above, in which, in a linkage set, the linkages are substantially parallel.
  • a ground contouring assembly substantially as described above, in which the geometry of the ground contouring assembly is such that it can adopt a conformation in which, when viewed in plan, a plane passing through a linkage set is substantially parallel in direction to said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which the geometry of the ground contouring assembly is such that it can adopt a conformation in which, when viewed in plan, a plane passing through each linkage set is concurrently substantially parallel in direction to said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which there is also included at least two elevation controlling linkages which are adjustable in length.
  • a ground contouring assembly substantially as described above, in which an elevation controlling linkages extends between said front accessory body portion and the rear body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed from the side, with said body connecting linkages nominally in a substantially horizontal conformation, said elevation controlling linkages are at an angle of at least, and including, 20 degrees to the horizontal.
  • a ground contouring assembly substantially as described above, in which, when viewed from the side, one end of a said elevation controlling linkage is connected at a higher relative point on the rear body portion than it is on the front accessory body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed from the side, one end of a said elevation controlling linkage is connected at a lower relative point on the rear body portion than it is on the front accessory body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed from the side, one end of a said elevation controlling linkage is connected at a point nearer the top of the rear body portion and at a point closer to the bottom on the front accessory body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed from the side, one end of a said elevation controlling linkage is connected at a point nearer the bottom of the rear body portion and at a point closer to the top on the front accessory body portion.
  • an elevation controlling linkage comprises an actuator.
  • a ground contouring assembly substantially as described above, in which the actuator is hydraulic in operation.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, there is an elevation controlling linkage either side of said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, the elevation controlling linkages are to the outside of provided body connecting linkages.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, said elevation controlling linkages are approximately equidistant from said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which the elevation controlling linkages can be lengthened and shortened by differing amounts from each other.
  • a ground contouring assembly substantially as described above, in which, adjusting the length of the elevation controlling linkages by different amounts to each other allows rotation of the front accessory body portion relative to the rear body portion about a longitudinal axis falling within the longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which there are pivotable connections between said elevation controlling linkages and said two body portions.
  • a ground contouring assembly substantially as described above, in which said pivotable linkage connections allow, when viewed in plan, sideways movement of the front accessory body portion relative to the rear body portion.
  • a ground contouring assembly substantially as described above, in which there is provided a lateral shift control linkage which determines any degree of sideways movement.
  • a ground contouring assembly substantially as described above, in which a lateral shift control linkage is of fixed length, or able to be configured to a specific length, to prevent relative sideways movement of the front accessory body and rear body portions.
  • a ground contouring assembly substantially as described above, in which a lateral shift control linkage is of controllable and adjustable length to control relative sideways positioning of said front accessory portion to the rear body portion.
  • a ground contouring assembly substantially as described above, in which one end of a lateral shift control linkage is connected to a first lateral shift connection point which is fixed relative to the rear body portion, and at its alternate end to a second lateral shift connection point which is fixed relative to the front accessory body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, said lateral shift connection points are positioned near opposite ends respectively of their associated body portion.
  • a ground contouring assembly substantially as described above, in which, when viewed in plan, said lateral shift control linkage is substantially transverse and normal to said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which the front accessory body portion comprises a mouldboard with a blade edge.
  • a ground contouring assembly substantially as described above, in which the front accessory body portion provides the attachment of a blade edge along its lower edge.
  • a ground contouring assembly substantially as described above, in which the front accessory body portion includes a side guard at at least one end thereof.
  • a ground contouring assembly substantially as described above, in which a side guard is substantially planar to said longitudinal centre plane.
  • a ground contouring assembly substantially as described above, in which said rear body portion includes vehicle attachment means, for attachment of the ground contouring assembly to a vehicle.
  • a ground contouring assembly substantially as described above, in which said vehicle attachment means includes an excavator head mount, for connecting to the mount head of an excavator type arm.
  • a ground contouring assembly substantially as described above, in which said vehicle attachment means comprises a quick hitch adaptor for connection to industry quick hitch mechanisms on tractors.
  • a ground contouring assembly substantially as described above, in which aforesaid actuators are connected to a control system allowing for the provision of either or both of: (i) manual control by an operator, and (ii) automated control.
  • a ground contouring assembly substantially as described above, in which automated control includes laser assisted guidance.
  • a ground contouring assembly substantially as described above, which is attached to a vehicle.
  • a ground contouring assembly substantially as described above, in which the vehicle is an excavator.
  • a ground contouring assembly substantially as described above, attached via a quick mount type system.
  • a ground modifying accessory for simplicity of description, we shall generally refer to the case of a ground modifying accessory as being a blade or mouldboard (unless otherwise specified).
  • the relative two dimensional structure of a blade/mouldboard helps simplify the understanding of the various geometries and features of various embodiments in different configurations. It is envisaged that the skilled reader, in light of the description herein, will understand how other ground contacting and/or modifying accessories may be substituted for a blade in various embodiments according to the descriptions.
  • a preferred use of the present invention is for use in levelling operations, which typically involves ground modification and sometimes ground preparation and modification.
  • a typical example is a building site which must be levelled, often to true horizontal. Prior to levelling there is like to be mounds, ridges, dips, and various other features in the terrain which must be reformed to being flat and level (typically horizontal, but the final level could be an inclined plane). In simple situations the site may be backfilled with sand, which is relatively simple to grade. In other applications of the present invention, there may be hard ground, weeds and thatched plant material, rubble, and sometimes a paved surface such as bitumen/tarmac etc.
  • Preferred embodiments of one aspect of the present invention comprise, in simple form, a body mounting portion - which can be affixed to (or employed as part of) a vehicle - and an accessory body portion which includes or can have attached a ground modifying accessory (such as a blade in its simplest form) for operations such as ground levelling.
  • a linkage assembly in preferred embodiments, has a geometry allowing restricted movements of the accessory body portion relative to the body mounting portion - which effectively means, when attached to a vehicle, restricted movement of the blade relative to the vehicle.
  • the linkage assembly typically comprises a combination of stabilising linkages (typically of fixed length) and linear actuators, which can be lengthened or shortened to effect relative movement of the accessory body portion with respect to the body mounting portion.
  • stabilising linkages typically of fixed length
  • linear actuators which can be lengthened or shortened to effect relative movement of the accessory body portion with respect to the body mounting portion.
  • these linear actuators are hydraulically operated, but need not be in all embodiments.
  • the geometry allows for the accessory body portion to undergo several movements relative to the body mounting portion (and hence vehicle).
  • the first is an up and down movement.
  • the general plane of the blade can remain substantially the same during the up and down movement, such that the movement is virtually an up and down translational movement - i.e. the general plane of the blade remains substantially within a translational plane.
  • This movement allows the elevation of the bottom of the blade to be altered as the vehicle travels over mounds in the ground.
  • Use may be made of a laser guidance control system (or equivalent) to help maintain the bottom of the blade/accessory at a particular elevation relative to a ground reference point.
  • the lengthening and shortening of the linear actuators control the up and down movement, while stabilising linkages help prevent rotation of the blade plane about a vertical axis (yaw, in the standard pitch, roll, yaw scenario).
  • Preferred embodiments ideally have a pair of stabilising arms, ideally with ball joint connections at at least one end of each, to also help restrict rotational movement of the general plane of the blade to substantially within a said translational plane as mentioned above - i.e. they help prevent rotation of the blade or accessory body portion about a vertical axis as other movements are effected.
  • Both the translational (i.e. up/down) and rotational movements (about a forward facing axis) mentioned above may be sequentially or simultaneously effected.
  • Specialised embodiments may also allow for some rotation of the accessory body portion, or the blade itself, about a transverse (relative to the direction of travel) axis as well.
  • the aforesaid movements will allow, in the case of a ground contouring assembly mounted to a vehicle performing a ground levelling operation, for the operator to maintain the bottom edge of the blade at a fixed level relative to a reference (within the limits of the capacity of the equipment to compensate for extremes in the level of the ground).
  • a reference within the limits of the capacity of the equipment to compensate for extremes in the level of the ground.
  • Excavator mounting systems do not typically allow for any rotational (about a forward axis) adjustment of an attached blade - the ground contouring assembly of the present invention includes this feature, thereby making it possible for excavators to more effectively perform ground levelling operations.
  • a stabilising wheel arrangement typically forwardly of the blade.
  • This wheel arrangement may be alternately between operational (contacting the ground) and non-operational positions.
  • the arm arrangement includes a pivoting connection allowing the end portion (with the stabilising wheel arrangement) to pivot upwardly such that the wheels clear the ground.
  • the stabilising wheel arm of this embodiment pivots to a perpendicular position or backwardly of perpendicular, and more preferably so that the end arm portion and wheel arrangement are positioned behind the pivotable connection.
  • one of the problems encountered during use is when an operator comes up to a boundary edge and the stabilising wheel arrangement encounters the boundary (e.g. a fence, wall, geographical feature) before the blade does. This means closest the blade can get may be around 1600-1800mm from the boundary. By implementing the folding arm arrangement the length may typically be reduced by around 1200mm depending on the specific design. This is much better for work in close confines. Also, as not all applications of the invention may require the use of the stabilising arm and thus the user has the option of either using the stabilising arm or having it raised, effectively converting the embodiment into a dual purpose utility device.
  • the boundary e.g. a fence, wall, geographical feature
  • a further specialised embodiment of the present invention allows the ground contouring assembly to attach directly to the existing blade of a vehicle - useful where a vehicle may not have a blade able to be quickly removed, or at all.
  • Preferred implementations of these embodiments have at least one first hook like feature for engaging the top edge of an existing vehicle blade, and at least one second hook like feature for engaging the bottom edge of said existing vehicle blade.
  • At least one of said first and second hook like features will include tightening means (typically on a link to the ground contouring assembly) which allows the ground contouring assembly to be drawn tight against said existing vehicle blade - and subsequently relaxed for release from the existing vehicle blade. This represent a quick and effective system for securing ground contouring assembly to an existing blade.
  • the geometry of the linkages between the body portions allow for the rotational angle of the blade portion (and hence blade) to be altered relative to the attachment portion, as well as its elevation relative thereto.
  • the attachment portion we are using the attachment portion as our reference point.
  • the blade edge itself will be come the fixed point, relative to a reference point of true ground level and true horizontal.
  • the blade will be maintained in the same position (as far as is possible) despite changes in the pitch or roll of the vehicle to which the ground contouring assembly is attached.
  • the primary stabilising linkages will have pivoting ends - preferably a ball joint - to accommodate the geometry changes as the actuators are extended or contracted.
  • the geometry is chosen also to provide lateral stability of the two body portions, as well as substantially maintaining their distance of separation (major differences here as the blade changes position can affect the outcome for a device mounted on a moving vehicle).
  • preferred embodiments also include an accessory mounting system to allow for the attachment of accessories such as scarifiers, or Harley rakes and the like.
  • an accessory mounting system to allow for the attachment of accessories such as scarifiers, or Harley rakes and the like.
  • scarifiers or Harley rakes and the like.
  • a ground contouring assembly there are provided side guards either side of the blade and mouldboard elements. These are ideally strengthened or significantly strong to allow the mounting of an accessory (such as a Harley rake, scarifier, etc.) to be mounted between them.
  • the complete accessory can be mounted on pivotable mounts on the side guards. This arrangement should allow the mounted accessory to rotate between at least an accessory retracted position, and at least one accessory engaged position (there may be a degree of variation here to allow multiple or continuous positions).
  • a transverse accessory mount spanning said side guards, or similarly acting supports. This is rotatably mounted to allow rotation about a transverse axis, typically substantially parallel to the blade or mouldboard. It is typically mounted forwardly of the mouldboard, and the blade, and elevated above the latter. The distance forward of the blade and mouldboard can vary according to the accessory and its operation. While the mounting of a non-powered scarifier could be close to the mouldboard and/or blade, a powered drum such as a Harley rake may benefit from being further forward to allow space between it and the blade for accumulated material.
  • an accessory mount is likely to be further forward, but it is envisaged that the provision of multiple accessory mounts is within the scope of the present invention and it is recognised that only the more forward mounting assembly may be effectively operational (able to rotated between engaged and retracted positions) if implements were fitted to both simultaneously (e.g. a non-powered scarifier at the rear and a Harley rake at the front, for instance).
  • mount rotation means to allow the transverse accessory mount (and any attached accessory) to be managed between the aforesaid accessory engaged and retracted positions.
  • this may be a linear actuator, probably hydraulic in operation, which the operator can control by some means.
  • a potential advantage of the use of the rotating transverse mount assembly is that a strong and reliable connection can be made between the transverse accessory mount and side support elements (e.g. side guards). Also the mount rotation means can remain connected rather than having to be affixed every time an accessory is changed, fitted, or removed. Also it is possible for the ground contouring assembly to be raised, manoeuvred so the transverse accessory mount is above the accessory, and lowered down (guide plates may be provided) so any connecting pins or attachments can be secured. This can speed the process of fitting, removing, and changing accessories as required.
  • a powered drum such as a Harley rake
  • advantage may be obtained by including inboard motors within the body of the drum - as opposed to external chain drives, etc.
  • inboard motors may be hydraulic in operation, and fitted at either end of the drum/body portion. This would allow an accessory to extend the full width of the mouldboard and blade, and side guards where present.
  • the potentially realisable advantage in practice is that it enables an operator to work the ground very close to a boundary while working in either direction - where single end chain drive systems are used, working close to a boundary is only possible when the chain arrangement is farthest from the boundary (hence the operator may need to travel to the end, turn around, and come back in the favourable direction).
  • the scarifier may comprise one or more modules with downward tines which are either connected directly to the transverse accessory mount, or to a mount which itself attached to the transverse accessory mount.
  • scarifiers may undergo significant pressure in the forward direction, they may be provided with back support. This could be a fixed bar or element extending from or between the side guards, or like. Alternatively part of the scarifier assembly may bear against the mouldboard and/or blade (though preferably the former) so that the accessory body portion bears some of the force acting on the tines/scarifier.
  • mount rotation means to relax - e.g. for a linear actuator to travel without resistance.
  • a fixed scarifier such as above
  • it is typically doing its primary work when the ground contouring assembly is moving forward. If it is supported at its rear by the mouldboard and/or blade (or other element(s)) then the mount rotation means is temporarily redundant.
  • the mount rotation means In preferred operation of a fixed scarifier, it can be more useful for the tines to drag over the ground (instead of penetrating) when the ground contouring assembly is being reversed.
  • the provision of a relaxed mount rotation means would allow this to happen, though it could be operated when the scarifier needed to be moved to an accessory retracted position.
  • a ground contouring assembly (generally indicated by arrow 1) comprising a body attachment portion (generally indicated by arrow 2) and an accessory body portion (generally indicated by arrow 3); the two body portions 2, 3 being connected by body connecting linkages 5-7 which allow a substantially translational movement of the accessory body portion 3, substantially parallel and relative to the accessory body portion 2 - see for instance figures 3a and 3b ; the body connecting linkages 5-7 also allowing a rotational movement of the accessory body portion 3, relative to the body attachment portion 2, about a rotational axis substantially in the direction of forward travel 9 of the assembly 1 - see for instance figure 3c ; said body connecting linkages including linear actuators 5a, 5b, there being at least one linear actuator 5 being present either side of the middle 10 of the ground contouring assembly 1 when viewed in plan; said body connecting linkages 5-7 also including at least one pivot-ended stabilising linkage 6-7 either side of the middle 10 of the ground contouring assembly 1 when viewed in plan; said body connecting linkages 5-7 also including at least one pivot-ended stabilising
  • the body attachment portion 2 includes a quick-hitch arrangement 4 such as commonly used on skid-steer tractors.
  • FIG. 1 in the illustrated embodiment 1 there are two hydraulically controlled upper linear actuators 5a, 5b which can be independently controlled to alter the relationship of each end of the blade portion 3 relative to the body attachment portion 2.
  • This is best illustrated in figure 2 , where right hand actuator 5b is contracted relative to left hand actuator 5a to adopt a configuration such as shown in figure 3c .
  • lower linkages 7 may comprise connecting arms, these may also comprise hydraulically controlled lower linear actuators which work in cooperation with actuators 5 to allow the accessory body portion to adopt the configurations shown in figures 3 , and combinations thereof.
  • This arrangement can also allow for alteration of the inclination of the blade 11 about a transverse axis, under the control of the operator.
  • the stabilising linkages, pivot-ended linkages 6a, 6b, 7a, 7b have ball joint ends where they attach to at least one of the body portions 2, 3 which is necessary to allow for the permitted relative movements of the body portions 2, 3.
  • a spherical bush is used in the joints - this joint 14 can be clearly seen in the stabilising arms 6 where they (in this embodiment) attach to a central mounting point 15 on the body mounting portion 2.
  • the geometry of the remaining connecting linkages assist in maintaining the relationship between the two body portions 2, 3 as movement occurs (such as shown in figures 3 ).
  • the distance of separation between the body portions 2, 3 remains substantially the same, as does their relative forward/rearward inclinations (i.e. inclination being rotation about a transverse axis) relative to each other (though some flexibility is allowed here in the design of the geometry in various embodiments).
  • the primary permitted relative movements between the body portions 2, 3 are, when viewed from the front and wherein the body attachment portion 2 is considered fixed in position, relative upward and downward movement of the accessory body portion 3 relative to the body attachment portion 2, as well as allowing relative upward and downward movement of each end of the accessory body portion 3 relative to the body attachment portion 2 - allowing also for inclination of the blade portion 3 (relative to the body attachment portion 2), such as shown in figure 2 .
  • the actuators can also be coupled to a laser levelling control system (sensors or emitters can be mounted on arms (not shown) which fix at positions 12 on the blade portion 3) so that the blade 11 is maintained at true ground elevation and the horizontal, regardless of any pitching and rolling movements of the vehicle to which the ground contouring assembly 1 is attached.
  • a laser levelling control system sensors or emitters can be mounted on arms (not shown) which fix at positions 12 on the blade portion 3) so that the blade 11 is maintained at true ground elevation and the horizontal, regardless of any pitching and rolling movements of the vehicle to which the ground contouring assembly 1 is attached.
  • the quicker responsiveness of the present embodiment also allows the vehicle to travel faster.
  • FIGS 4 and 5 we see a folding embodiment of the present invention, where a provided stabilising arm assembly 30 has a folding end portion 31 on which a ground contacting stabilising wheel arrangement 32 is mounted.
  • FIGS 6 and 7 we see a further embodiment suitable for attachment to an excavator.
  • a quick hitch 4 we have an arm arrangement 50 to which is pivotably attached 53 a T-pin 51 comprising a quick hitch adaptor (which may be of different quick connect configurations) to which the quick hitch adaptor 54 of an excavator's (not shown) dipper arm 52 may be attached.
  • This arrangement makes the ground contouring assembly available for use with excavators, a new and novel arrangement which significantly improves the versatility of both excavators and levelling devices.
  • At least one upper hook portion 72 affixed to the body mounting portion 70 hooks over the top of the existing blade 71.
  • a contacting bar 78 may be provided on the body mounting portion 70 to help accommodate the different curves of blades and reduce possible damage to the blade 71.
  • the adjustable element 75 may simply be a turnbuckle in a preferred element, and may be provided with an arm 76 to help tighten the turnbuckle, and provide additional stabilisation when the distal end of the arm 76 is connected to a point 77 on the accessory body portion 3 after tightening.
  • a modified ground modifying assembly including a rotatable accessory mounting portion 101 comprising a transverse accessory mount 102, in simplest form comprising rectangular hollow section bar, connected at each end to side supporting elements (in this case comprising side guards) 106 by rotatable mounts 105 allowing at least partial rotation of the mount 102 about a transverse axis substantially in parallel with the general plane of the blade 11 or mouldboard 107 of the accessory body portion.
  • Linkage tabs 104a, 104b allow for control of the rotation of the mount 102 by allowing the connection of mount rotation means comprising linear actuators 103a, 103b. In preferred embodiments these are hydraulic and capable of progressive and continuous control by the operator, and/or could be linked into an automated control system. In this figure the mount 102 is shown in an accessory retracted position.
  • a power drum assembly such as a Harley rake 114 to the rear of structure support wheel 32.
  • a Harley rake 114 to the rear of structure support wheel 32.
  • Features such as teeth or studs 115 may be provided on the Harley rake drum 114.
  • the invention allows for such an assembly 110 to be attached directly to side supports 106 by a rotatable mount (e.g. 105) at each end, the preferred arrangements utilise the rotatable transverse accessory mount 101 of the embodiment of figure 10 for easier fitment and removal of accessories (e.g. 110).
  • Figure 12 provides a perspective view of the embodiment of figure 10 with the power drum accessory 110 of figure 11 (and such as detailed in figure 13 ) fitted and in the engaged position.
  • Figure 13 illustrates a preferred power drum accessory 110 arrangement such as would be used in preferred embodiments as described in relation to figures 11 and 13 .
  • a preferred power drum accessory 110 arrangement such as would be used in preferred embodiments as described in relation to figures 11 and 13 .
  • the power drum could utilise a compact external hydraulic motor at each end the option for preferred embodiments is predominantly inboard hydraulic motors 112a, 112b positioned largely within the drum 114 itself. In this situation only the protective cap and mount 111a, 111b need extend outside of the planes defined by the side guards 106 while allowing the drum 114 to extend the full width within the extended vertical planes defined by the side guards 106.
  • the protrusions 115 from the drum 114 are defined by choice, and may be replaceable elements or formed into drum 114 itself.
  • the user is open to choice here.
  • Various types of teeth, blades, features may be provided along with different combinations thereof - for instance the user choice for breaking asphalt and road-seal may be different from dethatching and preparing areas covered with vegetation.
  • the power drum may comprise a brush for finishing and screeding areas, finishing landscaped areas or lightly covering sown seed, or even removing excess materials and debris on finished areas (e.g. gravel chips on finish tar sealed roading and sidewalks etc). It is intended that there will be user choice in the selection of the properties of the power drum in a power drum assembly 110.
  • Figure 14 illustrates a different perspective view of the embodiment of figure 12 , and also shows the laser receiver unit 116a, 116b guide poles 117a, 117b which can employed with various embodiments of a ground contouring assembly 1 to enable it to be used in association with a laser guidance and levelling system, or full 3D guidance system, such as becoming more common in the industry.
  • a laser guidance and levelling system or full 3D guidance system, such as becoming more common in the industry.
  • Leica® can provide accessory guidance and control systems able to work with position transmitters and solutions for use on various sites (and types of site).
  • a potentially realisable advantage of various embodiments of the present invention is that when such laser assisted systems are used, any mounted accessories on the accessory body portion also operate under the same laser assisted control as the blade and benefit from the advantages thereof.
  • a ground contouring assembly of the present invention to which various accessories can be fitted provides a useful advance in the industry - the multiple linkage arrangement connecting the accessory body portion to the body attachment portion allows for angling of the accessory under operator control and/or in response to laser assisted control systems.
  • No prior art accessories such Harley rakes/power drums, scarifiers, etc are able to be angled in response to changing ground contours and this represents a significant disadvantage (multiple passes with different accessories) in terms of time and accuracy for land and site preparation and contouring.
  • FIG 15 illustrates another accessory which may be fitted by an operator to an accessory mount 102.
  • a scarifier module 121 comprises a plurality of tines 123 connected to an accessory mount portion 122 for fitting to the transverse mount 102.
  • a pivot pin(s) (not shown) aligned with axis 124 allows for forward pivoting of the tines 123 allowing for them to drag freely when the ground contouring assembly is being reversed in operation.
  • Alignment pins 125a, 125b maintain spacing of the tines.
  • Apertures 126, 127 in the mount and tine portions respectively allow an operator to temporarily lift the tines 123 and place a pin in to lock them in an up position. This can be useful for improving visibility for the operator in certain operations where the tines are not required. This can still used in conjunction with rotation of the transverse mount 102 to further lift the tines 123.
  • a rear tab or bar at the rear of the mount ribs 128 which limits rearward travel of the tines 123 during forward movement of the ground contouring assembly 1, and to allow the tines 123 of the module 121 to be raised when the accessory bar is moved to an accessory retracted position.
  • the scarifier modules could be positioned directly in front of the blade and mouldboards of the ground contouring assembly to allow them to be used in conjunction with another accessory on a transverse accessory mount 102, allowing an operator to readily use both in conjunction or alternate between use of the two accessories with relative ease of operation and adjustment. It should also be appreciated that a single scarifier module extending the full width of the mount 102 could be used, or multiple smaller modules used as required.
  • Figure 16 illustrates a further modification to various embodiments of the present invention.
  • a simplified pivoting carriage with single pivot 132 can be provided and attached to a forwardly extending support 133, which may be fixed or removable.
  • This arrangement gives a greater unobstructed distance 134 between the wheels 134 and projected general vertical plane of the side guards. This increased clearance make it easier for an operator to work close to, and around, obstructions - potentially providing a cleaner job with minimal manual follow up to finish problem areas.
  • a forward carriage is desirable to help stop the ground contouring assembly 1 from nosing down into softer materials and maintaining a more accurate natural level for the tractor and ground contouring assembly combination.
  • Such operations may include tilting the accessory body portion forwardly or rearwardly (about a transverse axis - i.e. altering the pitch of the accessory body portion).
  • Other operations may include rotating the angle of the accessory body portion 203 about a vertical 'z' axis - i.e. a yaw type movement. And various combinations of these operations and that of previously described embodiments. It should also be appreciated that these operations also affect any accessories which may also be mounted on the accessory body portion 203.
  • Figure 17 refers a modification of embodiments such as shown in figure 8 .
  • linkages 7 e.g. figure 8
  • linear actuators 207 These can be lengthened or shortened (ideally in tandem) to adjust pitch - we shall assume that other linkages/actuators remain at constant length while visualising this. Once a desired pitch has been achieved, their length may be maintained to retain this relative pitch (though see also more sophisticated embodiments discussed later).
  • the actuators 207 function primarily as adjustable linkages, enabling these variant embodiments (e.g. figure 17 ) to still operate in the manner of the embodiment of figure 1 (for instance).
  • Providing linear actuators 206 to replace linkages 6 of figure 1 allows for the aforesaid yaw-like adjustments to be made.
  • the operation is a little different and will typically involve extending one actuator 206 while retracting the other 206.
  • the geometry is also a little different and these actions may also cause some roll-movement of the accessory body portion 203. While this might be acceptable in some embodiments, providing actuators 207 instead of fixed length linkages (e.g. 7) can help compensate and allow adjustment to reduce these other pitch and/or roll changes when adjusting yaw.
  • the operator may have direct (or indirect fly-by-wire type) control over pitch and yaw, as these are often more influenced by the type of terrain and material that the ground contouring assembly is working on. It also envisaged that these embodiments may also be used on non-laser assisted embodiments of a ground modifying assembly with direct control of the actuators (205-207 where provided) by the operator. There may also be fly-by-wire type assisted operation using computational means with a control system to enable the operator to more easily attain a particular attitude of the accessory body portion 203 - it is envisaged that such embodiments might even used modified joysticks or roller-ball type controls for the operator, rather than individual controls for each actuator and/or set thereof (i.e.
  • Figure 18 illustrates the embodiment of figure 17 in which actuators 207 have been shortened to enable the accessory body portion to pitch forward relative to the ground 220. Once these actuators 207 have been set and maintained at the required length, and assuming also that actuators 206 are also maintained at constant length (assuming these are present instead of linkages 6) then operation of actuators 205 will raise and lower the accessory body portion 203 while maintaining substantially the same pitch. In fact, operation of actuators will be substantially the same in effect as for the embodiment of figure 1 .
  • the walking beam will then act as an anchor and drive the wheel into the soft ground, as the high pivot point creates a high angle of attack to try and force the whole ground modifying assembly around this point. Apart from marking levelled and worked ground, it puts severe strain on the assembly's structure. This all happens in a split second, so is difficult for the operator to identify, as they are often looking behind to see where they going.
  • One solution of the present invention is to lower the pivot point of the walking beam as low as possible to get it below the centre of gravity of the walking beam assembly.
  • the pivot should be below the centre of gravity of the pivoting walking beam assembly.
  • ground clearance for various applications of a ground modifying assembly is a practical consideration in calculating the lowest practical pivot point in differing embodiments.
  • Figures 20 and 21 illustrates a low pivot version of a carriage in a schematic fashion.
  • Figures 26 and 27 represent a preferred embodiment.
  • 501 represents the forward drawbar or portion of the ground contouring assembly to which the carriage portion is affixed.
  • Figure 14 an example of a high pivot walking beam such as previously used in the art, is illustrated in Figure 14 .
  • a downward extension 502 provides a suitable mounting point for the carriage pivot portion 506.
  • This carriage pivot 506 connects the extension 502 to the lower extending portion of the carriage body 505 to which the wheel assemblies 504 are attached.
  • the wheel assemblies 504 of this embodiment can rotate about a substantially vertical axis by pivotable attachment 503.
  • the wheel assemblies are a trailing type assembly in this embodiment, where (in plan) the central wheel pivot is offset from vertical pivot 503.
  • FIGs 26 and 27 illustrate a working embodiment of a ground modifying assembly 530 with and underslung pivot 506.
  • a simple embodiment which might be used on an excavator arm is shown.
  • the ground working accessory 520 is a blade, and this faces away from the wheel portion - typically an excavator will use its boom/arm to draw the ground modifying assembly 530 towards it.
  • this ground working accessory 520, 521 may, in other embodiments, be substituted by other body and accessory portions as in other figures of this specification - or in other words, the underslung pivot 506 carriage arrangement may be substituted for the wheeled carriage portions appearing in embodiments illustrated in other figures herein.
  • Figure 26 illustrates how, when the apparatus is lifted from the ground (or travelling over uneven ground) the front carriage portion 503, 504, 505 will tilt to one side or the other (if dangling) or tilt to follow ground contours. Rubber stops 518 may be provided to lessen shock as it meets the maximum rotation limit.
  • Figures 22 through 24 comprise a different embodiment of a leveller which uses a simpler parallel type linkage arrangement. This arrangement is potentially useful in some embodiments of levellers (ground modifying assemblies), and particularly for excavator mounted levellers. Depending on the size of an excavator (or other vehicle with a movable support arm) there may be a weight restriction on attached accessories which also has a bearing on the maximum reach, maximum angle of inclination of a ground plane on which the excavator/vehicle is working.
  • Figures 22 to 25 show an alternative embodiment which uses a simpler linkage system which can yield a lighter leveller type assembly - potentially a significant advantage for excavators.
  • figure 1 represents the geometry of the applicant's prior art levelling assembly for comparison.
  • the fixed diagonal linkages 6a, 6b between the front accessory body portion 3 and the rear body portion 2 effectively prevent sideways lateral movement - which was considered a desirable attribute for the intended uses of this device.
  • the art and industry needs apparatus with lateral adjustment.
  • a levelling assembly (see figure 22 ) comprising a front accessory body portion 603, and a rear body portion 602, the two body portions 602, 603 connected to each other by at least four body connecting linkages L605, L606, R605, R606, said body connecting linkages, in plan view, being distributed either side L605, L606 and R605, R606 of a vertical longitudinal centre-plane 607 bisecting said two body portions 602, 603, said body connecting linkages L605, L606 and R605, R606 including pivotable linkage connections to said body portions 602, 603 to allow, when viewed from the side, the relative elevation to the two body portions 602, 603 to alter.
  • the front accessory body portion 603 includes a blade 608 attached to a mouldboard portion 609 and has collectively been referred to as the "blade" previously in this specification.
  • Side guards L610 and R610 may be provided or both sides, one side only, omitted, or removably attached as required.
  • the rear body portion 602 provides a body structure including a mounting point 612 for one end of an actuator 614 comprising the lateral shift control linkage.
  • a pivotable bush or ball joint type connection may be provided here 612.
  • the other end 615 of the actuator 614 is attached to the front accessory body portion 603 though due to the partially cut away view the mounting attachment point is not fully visible.
  • the rear body portion 602 may also include an attached quick hitch mount as required, and as is visible as item 4 in figure 1 .
  • Figure 25 shows the left L618 and right R618 elevation controlling linkages, comprising linear hydraulic actuators.
  • Figure 2 illustrates the diagonal mounting arrangement (from side view) of left (equivalent to right) elevation controlling linkage L618, and its connection L818 near the top of the rear body portion 602 though the connection L818 to the front body portion 603 is obscured in this figure.
  • elevation controlling linkages L618, R618 may be placed inwardly (closer to the centre plane 607) or outwardly of the left and right sets of connection linkages L605, L606 and R605, R606 as convenient or desired.
  • the levelling apparatus may also include an excavator boom arm quick mount 626 if this is a required vehicle mounting option.
  • Laser sensor poles may be affixed at mounting points L628, R628 on the side guards L610, R610 if required, and sensors (not shown) attached.
  • a forward wheel assembly possibly upwardly folding or retractable may be provided on various embodiments though this may not be required on all embodiments,
  • a kerb following wheel assembly may be provided on one or both sides of the front accessory body portion 602 to assist an operator in precision following of an existing structure or feature.
  • connecting linkages typically divided into two sets of two, which are conveniently referred to as left and right linkage sets, and distributed (ideally substantially equidistantly) outwardly of a vertical longitudinal centre plane (within which the levelling assembly's longitudinal axis in use also lies).
  • a vertical longitudinal centre plane within which the levelling assembly's longitudinal axis in use also lies.
  • no connecting point for a connecting linkage is near the centre plane in preferred embodiments.
  • the two connecting linkages of each set are displaced vertically with respect to each other - i.e. one appears positioned above the other, and in preferred (but not necessarily all) embodiments is vertically displaced one above the other.
  • the general planes of the two body portions are roughly parallel to each other, from the side the arrangement of the two connecting linkages (of a set) with the two body portions form a quadrilateral. This may ideally be a parallelogram but in practice may deviate from this precise geometry, and various contributing elements to this parallelogram may (typically) each fall up to (and including) 20 degrees of this ideal parallelogram.
  • a pivotable connection between same and the connecting linkages. While this may be a connection pivotable about a single axis (suitable for simple more limited embodiments of the present invention with a restricted range of movement), the desired range of movement in preferred embodiments prefers a more multi-axial range of movement such as provided by a ball joint.
  • a single axis mounted connection with a flexible bush accommodating movement in other directions is often suitable - truck suspension arm/component connections with compressible bushes are one example.
  • a pivotable connection which allows for the desired relative movements is used.
  • the elevation controlling linkages are typically also connected to the body portions with pivotable connections equivalent to the connecting linkages.
  • the elevation controlling linkages are typically actuators, and hydraulically controlled in preferred embodiments. These are typically operated in tandem, though users may operate them differently and in the geometry of the preferred embodiment limited rotation of the two body portions relative to each other is possible by altering the length of the actuators by different amounts. This is useful where the leveller is used to create an incline (e.g. reading etc.) during its operation.
  • preferred embodiments of the present invention can provide lateral and elevational translational movement, as well as longitudinal axis rotational movement, relative between the front and rear body portions.
  • an elevation controlling linkage is mounted substantially diagonally in side view, often being connected (in side view) at or near the top of one body portion and at or near the bottom of the other. Variations may exist in practice, though the requirement is to be able to change the relative elevation of one body portion to the other by altering the length of said elevation controlling linkage.
  • Lateral translation control may be provided by a lateral shift control linkage.
  • this may be a substantially transverse linear actuator connected at one end to the front accessory body portion, and at the other end to (or an element attached or part of) the rear body portion.
  • one end of the lateral shift control actuator linkage will be connected to one of the body portions at or towards its left side, and the alternate end to the other of the body portion at or towards its left side. While this actuator may be normal to the longitudinal centre plane, in practice it may be at an angle to the transverse so as to take advantage of suitable mounting points on the body portion and/or to avoid obstruction with other parts, portions, or components of the levelling assembly.
  • Laser sensor guide poles may be provided on various embodiments, allowing for the mounting of laser guidance sensors and their integration in to optionally provided laser guidance control systems available in the market.
  • a typical almost industry standard quick hitch mount (as commonly used on skid-steer loaders) may be provided on various embodiments.
  • Other options include mounting attachments for boom arms such as commonly present on excavator arms.
  • Various options may be implemented according to user need.

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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)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Operation Control Of Excavators (AREA)
  • Soil Working Implements (AREA)
  • Agricultural Machines (AREA)
EP19197206.6A 2018-09-13 2019-09-13 Appareil de contournement du sol comportant des accessoires montés Withdrawn EP3623532A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16/130,446 US10676894B2 (en) 2014-06-10 2018-09-13 Blade levelling apparatus with provision for mounted accessories
NZ74678618 2018-09-27
US201862767325P 2018-11-14 2018-11-14

Publications (1)

Publication Number Publication Date
EP3623532A1 true EP3623532A1 (fr) 2020-03-18

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Application Number Title Priority Date Filing Date
EP19197206.6A Withdrawn EP3623532A1 (fr) 2018-09-13 2019-09-13 Appareil de contournement du sol comportant des accessoires montés

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EP (1) EP3623532A1 (fr)
AU (4) AU2019101857A4 (fr)
CA (1) CA3055323A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022009076A1 (fr) * 2020-07-06 2022-01-13 Progressive Ip Limited Améliorations apportées et associées au travail du sol et d'autres surfaces
US20230287651A1 (en) * 2020-07-06 2023-09-14 Progressive Ip Limited Improvements in & relating to the working of ground and other surfaces
AT526163A4 (de) * 2022-07-15 2023-12-15 Schwing Gmbh F Vorrichtung und Arbeitsmaschine

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US3724557A (en) * 1969-07-22 1973-04-03 Boschung Fa M Apparatus adapted to be coupled to a traction vehicle serving for the maintenance or construction of water-bound roads
US5988294A (en) * 1997-12-09 1999-11-23 Hubscher; Darin Cultivator
US20170130421A1 (en) * 2014-06-10 2017-05-11 Progressive Ip Limited Blade levelling apparatus and mounting system

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US2771693A (en) * 1955-06-08 1956-11-27 Charles S Busque Land clearing implement
US2943407A (en) * 1958-02-27 1960-07-05 Case Co J I Bulldozer blade mounting
US3374562A (en) * 1965-04-30 1968-03-26 Omsteel Ind Inc Blade gate
US5669450A (en) * 1995-12-20 1997-09-23 Martin Equipment Of Illinois, Inc. Quick mount front end scarifier

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724557A (en) * 1969-07-22 1973-04-03 Boschung Fa M Apparatus adapted to be coupled to a traction vehicle serving for the maintenance or construction of water-bound roads
US5988294A (en) * 1997-12-09 1999-11-23 Hubscher; Darin Cultivator
US20170130421A1 (en) * 2014-06-10 2017-05-11 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

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022009076A1 (fr) * 2020-07-06 2022-01-13 Progressive Ip Limited Améliorations apportées et associées au travail du sol et d'autres surfaces
US20230287651A1 (en) * 2020-07-06 2023-09-14 Progressive Ip Limited Improvements in & relating to the working of ground and other surfaces
AT526163A4 (de) * 2022-07-15 2023-12-15 Schwing Gmbh F Vorrichtung und Arbeitsmaschine
AT526163B1 (de) * 2022-07-15 2023-12-15 Schwing Gmbh F Vorrichtung und Arbeitsmaschine

Also Published As

Publication number Publication date
AU2022202151A1 (en) 2022-04-21
AU2019101857A4 (en) 2024-09-12
CA3055323A1 (fr) 2020-03-13
AU2022202151B2 (en) 2023-08-03
AU2019229417A2 (en) 2024-06-27
AU2019229417A1 (en) 2020-04-02
AU2024203980A1 (en) 2024-07-04

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