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WO1999060218A1 - Machine de compactage du sol - Google Patents

Machine de compactage du sol Download PDF

Info

Publication number
WO1999060218A1
WO1999060218A1 PCT/IB1999/000906 IB9900906W WO9960218A1 WO 1999060218 A1 WO1999060218 A1 WO 1999060218A1 IB 9900906 W IB9900906 W IB 9900906W WO 9960218 A1 WO9960218 A1 WO 9960218A1
Authority
WO
WIPO (PCT)
Prior art keywords
masses
compaction machine
soil compaction
carriage
machine according
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.)
Ceased
Application number
PCT/IB1999/000906
Other languages
English (en)
Inventor
Eric Johnstone Cook
Christoffel Avril Mijburgh
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.)
Compaction Technology Soil Ltd
Original Assignee
Compaction Technology Soil Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compaction Technology Soil Ltd filed Critical Compaction Technology Soil Ltd
Priority to AU37243/99A priority Critical patent/AU3724399A/en
Publication of WO1999060218A1 publication Critical patent/WO1999060218A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02—Improving by compacting
    • E02D3/026—Improving by compacting by rolling with rollers usable only for or specially adapted for soil compaction, e.g. sheepsfoot rollers

Definitions

  • THIS invention relates to a soil compaction machine.
  • Machines according to the invention may operate as impact compactors.
  • the specification of EP 0 017 511 to A R Berrange describes a dual mass impact compactor which has two compactor masses mounted on a common axle structure. As is common in impact compactors, each mass has a non-circular profile with spaced apart salient points followed, in the direction of rotation, by compacting faces. When the masses are rolled over a soil surface which is to be compacted, each mass alternatively rises up on its salient points, thereby storing potential energy, and then falls forwardly so that the stored potential energy is delivered by the following compacting face, as an impact blow, to the soil surface.
  • the common axle structure described in the specification of EP 0 017 511 constrains the two compactor masses to rotate substantially in unison.
  • a soil compaction machine comprising a wheeled carriage, spaced apart, out-of-round compactor masses suspended relative to the carriage, each mass being defined peripherally by spaced apart salient points and intermediate compacting faces between the salient points, the arrangement of the salient points and compacting faces being such that when the mass is rolled over a soil surface it alternately rises up on each salient point in turn, thereby storing potential energy, and then descends onto the following compacting face to deliver the stored energy to the soil to compact it, characterised by suspension means which independently suspend the masses relative to the carriage.
  • the machine may be an impact compaction machine in which the shape and arrangement of the salient points and compacting faces is such that potential energy which is stored by each mass when it rises up on its salient points is delivered as a series of periodic impact blows to the soil by the following compacting faces.
  • the machine comprises two compactor masses, an upright drop link structure pivoted at or towards its lower end to the carriage, a pair of drag links pivoted to the drop link at or towards the upper end of the drop link and a pair of stub axles carried rotatably by the drag links, the masses being mounted on the stub axles.
  • Constraint means may be provided for constraining the two compactor masses to rotate substantially synchronously.
  • Such means may, for instance, comprise chain and sprocket mechanisms acting between the stub axles and a transverse shaft carried by the drop link.
  • the carriage may include a chassis mounted on a central wheel between the masses and on spaced apart wheels trailing the masses, means being provided which are operable to raise the spaced apart trailing wheels relative to the chassis and to raise the compactor masses relative to the carriage to travel over the ground in a non-compacting mode with the masses elevated off the ground.
  • the chassis may carry coupling means at its leading end for coupling the carriage to a tractive vehicle, the coupling means being movable relative to the chassis and the machine comprising damping means for damping movements of the coupling means relative to the chassis.
  • Figure 1 shows a perspective view of an impact compaction machine according to the present invention
  • Figure 2 shows a plan view of the machine seen in Figure 1 ;
  • Figure 3 shows a side view of the machine; and Figure 4 shows a view of the machine looking in the direction of the arrow 4 in Figure 3.
  • each mass 12 has a six-sided configuration, with equispaced salient points 14 alternating with flat compacting faces 16.
  • the salient points 14 and faces 16 are provided by tread plates 18 and 20 mounted to spoke structures 22 radiating from a central hub structure 24.
  • the tread plates are stiffened by stiffeners 21.
  • the hub structures 24 are mounted fast to the ends of independent stub axles 25 which are carried rotatably in bearing structures 26 which are located at the trailing ends of laterally spaced drag link structures 28.
  • the drag link structures are pivoted via a transverse shaft 30 to the upper end of a drop link 32 which is common to both compactor masses.
  • the drop link 32 is pivoted via a shaft 34 to brackets 36 carried by a rigid chassis 38 forming part of a wheeled carriage designated generally by the numeral 40.
  • Damping rubbers 42 are mounted to the chassis 38 opposite the lower end of the drop link 32, below the pivot shaft 34.
  • the forward end of the chassis 38 carries a coupling structure 44 by means of which the machine 10 can be coupled in trailing relationship to a tractor (not shown).
  • the coupling structure 44 includes a shaft 46 which is capable of limited fore and aft sliding movement relative to the chassis.
  • a linear damper indicated diagrammatically in Figure 3 with the numeral 48, is provided within the structure of the chassis to damp fore and aft sliding movement of the shaft 46 relative to the chassis.
  • the chassis 38 is suspended resiliently via rubber dampers 50 on a central, ground engaging wheel 52 located between the compactor masses 12.
  • a transverse wheel support beam 56 Connected pivotally to the rear end of the chassis, via a pivot shaft 54, is a transverse wheel support beam 56.
  • Opposite ends of the wheel support beam 56 carry spaced apart wheels 58 via bearings 60 which allow the wheels to pivot about upright axes in the manner of castors.
  • An hydraulic cylinder 62 acts between the chassis and the wheel support beam as shown. It will be appreciated that with the coupling structure 44 coupled to a tractor and the wheel 52 on the ground, contraction of the cylinder 62 will raise the beam 56 and wheels 58 off the ground. From their raised position, extension of the cylinder 62 will bring the wheels 58 back into contact with the ground.
  • a curved cradle 64 On each side of the carriage, beneath the respective stub axle bearing structures 26, there is a curved cradle 64 which is pivoted at its leading end to the drop link 32 at the shaft 34. At their rear ends the cradles 64 are connected to a transverse shaft 66 supported pivotally by brackets 68 connected to an upright hydraulic cylinder 70. Extension of the cylinder 70 will pivot the cradles 64 upwards, in a clockwise sense, as viewed in Figure 3. With sufficient extension of the cylinder 70, rubber bumpers 72 on the upper surfaces of the cradles 64 are brought into contact with the undersides of the stub axle bearing structures 26 and raise those structures, and with them the compactor masses 12, off the ground.
  • Chain sprockets 74 are mounted fast on the inner ends of the stub axles 25 and are aligned with similar sprockets 76 fast on the shaft 30.
  • Chains 78 indicated in Figure 2 by chain-dot lines, pass around the sprockets 74 and 76 and intermediate tensioning sprockets (not shown).
  • the coupling structure 44 is coupled to the tractor (not shown).
  • the wheels 58 are raised off the ground by contracting the cylinder 62, as described above.
  • traction is applied to the compactor masses 12 via the chassis 38, drop link 32, drag link structures 28 and stub axles 25.
  • Each mass goes through a repetitive process of rising up on a salient point 14, thereby storing potential energy, and falling forwardly and downwardly for the next succeeding compacting face to deliver the stored energy to the soil surface in an impact blow.
  • the chain and sprocket mechanism described above positively constrains the compactor masses 12 to rotate in unison with one another, i.e. synchronously. It has however been found in initial tests with a prototype machine that even without the chain and sprocket mechanisms, the masses tend to rotate substantially synchronously.
  • the independent suspension of the compactor masses 12 is considered to be a major advantage of the invention when compared to prior arrangements in which the masses are connected to one another by a common axle structure, primarily in view of the reductions in shock loading in the machine itself and as applied to the tractor, as described above. Particularly in cases where the masses are not positively constrained to rotate in synchronism, it is believed that the independent suspension of the masses will render them suitable for a wide variety of applications where site conditions may vary from one point to the next.
  • a further advantage of the machine as described above arises from the fact that the transverse width of each compactor mass 12 is greater than the clear spacing between the inner edges of the masses. This means that the strip of soil which is not contacted directly by the masses on each pass can easily be covered by one of the masses on the next pass.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Machines (AREA)

Abstract

L'invention concerne un machine (10) de compactage du sol comprenant un chariot à roues (40) et des masses (12) de compactage espacées et aplaties, suspendues indépendamment par rapport au chariot. Le pourtour de chaque masse (12) est défini par des points en saillie (14) espacés et des faces (16) de compactage intermédiaires situées entre les points en saillie. Les points en saillie et les faces de compactage sont montés de sorte que lorsque la masse (12) roule sur une surface de sol, elle monte en alternance sur chaque point en saillie (14), accumulant ainsi une énergie potentielle, puis descend sur la face (16) de compactage suivante pour transmettre l'énergie accumulée au sol afin de le compacter. Dans le procédé selon l'invention, les masses (12) sont suspendues indépendamment par rapport au chariot (40).
PCT/IB1999/000906 1998-05-21 1999-05-20 Machine de compactage du sol Ceased WO1999060218A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU37243/99A AU3724399A (en) 1998-05-21 1999-05-20 Soil compaction machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA98/4309 1998-05-21
ZA984309 1998-05-21

Publications (1)

Publication Number Publication Date
WO1999060218A1 true WO1999060218A1 (fr) 1999-11-25

Family

ID=25587017

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/000906 Ceased WO1999060218A1 (fr) 1998-05-21 1999-05-20 Machine de compactage du sol

Country Status (2)

Country Link
AU (1) AU3724399A (fr)
WO (1) WO1999060218A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6843615B1 (en) 1998-11-09 2005-01-18 Compaction Technology (Soil) Limited Compaction roller
WO2005014938A1 (fr) * 2003-08-06 2005-02-17 Roger Arnold Stromsoe Compacteur a impact
EP3617405A1 (fr) 2018-08-30 2020-03-04 Forschungs und Transferzentrum Leipzig E.V. an der Hochschule für Technik, Wirtschaft und Kultur Leipzig Générateur de vibrations pour dispositif à rouleau destiné au compactage du sol

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017511A1 (fr) 1979-04-09 1980-10-15 Aubrey Ralph Berrange Appareil de compaction
DE3434297A1 (de) * 1984-09-19 1986-03-27 Karl Matthias 8951 Ruderatshofen Mayer Parallel-pendel-vierradachse fuer fahrzeuge
FR2622847A1 (fr) * 1987-11-06 1989-05-12 Renault Suspension arriere a roues independantes
WO1997004179A1 (fr) * 1995-07-17 1997-02-06 Compaction Technology (Soil) Limited Compacteur de sol avec dispositif a roue stabilisatrice

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0017511A1 (fr) 1979-04-09 1980-10-15 Aubrey Ralph Berrange Appareil de compaction
DE3434297A1 (de) * 1984-09-19 1986-03-27 Karl Matthias 8951 Ruderatshofen Mayer Parallel-pendel-vierradachse fuer fahrzeuge
FR2622847A1 (fr) * 1987-11-06 1989-05-12 Renault Suspension arriere a roues independantes
WO1997004179A1 (fr) * 1995-07-17 1997-02-06 Compaction Technology (Soil) Limited Compacteur de sol avec dispositif a roue stabilisatrice

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6843615B1 (en) 1998-11-09 2005-01-18 Compaction Technology (Soil) Limited Compaction roller
WO2005014938A1 (fr) * 2003-08-06 2005-02-17 Roger Arnold Stromsoe Compacteur a impact
US7614821B2 (en) 2003-08-06 2009-11-10 Impact Compaction (Proprietary) Limited Impact compactor
EP3617405A1 (fr) 2018-08-30 2020-03-04 Forschungs und Transferzentrum Leipzig E.V. an der Hochschule für Technik, Wirtschaft und Kultur Leipzig Générateur de vibrations pour dispositif à rouleau destiné au compactage du sol

Also Published As

Publication number Publication date
AU3724399A (en) 1999-12-06

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