EP0983405B1 - Bodenverdichtungsgerät - Google Patents

Bodenverdichtungsgerät Download PDF

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Publication number
EP0983405B1
EP0983405B1 EP98921620A EP98921620A EP0983405B1 EP 0983405 B1 EP0983405 B1 EP 0983405B1 EP 98921620 A EP98921620 A EP 98921620A EP 98921620 A EP98921620 A EP 98921620A EP 0983405 B1 EP0983405 B1 EP 0983405B1
Authority
EP
European Patent Office
Prior art keywords
compactor
impact
drive means
impact compactor
angular velocity
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98921620A
Other languages
English (en)
French (fr)
Other versions
EP0983405A1 (de
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
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Publication date
Application filed by Compaction Technology Soil Ltd filed Critical Compaction Technology Soil Ltd
Publication of EP0983405A1 publication Critical patent/EP0983405A1/de
Application granted granted Critical
Publication of EP0983405B1 publication Critical patent/EP0983405B1/de
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
    • E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
    • E01C19/235—Rolling apparatus designed to roll following a path other than essentially linear, e.g. epicycloidal
    • 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 impact compactors.
  • impact compactor refers to a soil compaction machine which incorporates a rotatable, out-of-round mass that produces a series of impact blows to the soil surface when towed or otherwise driven over that surface.
  • the compactor mass of an impact compactor has multiple sides defining a series of spaced apart salient points on its periphery, each salient point being followed by a compacting face. As the mass is towed or otherwise driven over the soil surface, it rises up on each salient point and then falls forwardly and downwardly as it passes over that point, with the result that the following compacting face applies an impact blow to the soil surface.
  • the action of the mass is therefore to store potential energy as it rises up on each salient point and then to deliver this energy as an impact blow.
  • Impact compactors as described above have been found to work well in practice in achieving high levels of soil compaction, even at substantial depths below the soil surface. Problems may however be encountered in situations where the salient points tend to dig in or slide relative to the soil surface, with the result that the rotational speed of the compactor mass is reduced below normal levels, adding resistance to forward motion of the impact compactor.
  • the problem can be compounded in situations where the impact compactor incorporates a trailing levelling blade to level the compacted soil, because the inclusion of a levelling blade also increases the resistance to forward motion of the impact compactor.
  • an impact compactor comprising at least one out-of-round compactor mass which in use is movable rotationally by primary drive means, at an angular velocity suitable for normal operation, over a soil surface to apply periodic compaction blows to the soil surface, the impact compactor including auxiliary drive means arranged to operate automatically, in response to a reduction of the angular velocity of the, or each, compactor mass below an angular velocity suitable for normal operation, to apply an auxiliary rotary drive to the, or each, compactor mass to restore its angular velocity to that suitable for normal operation.
  • FIG 4 diagrammatically illustrates an impact compactor 10 according to the invention.
  • the impact compactor 10 is arranged to be towed by a prime mover in the form of a tractor 12, but it will be understood that the invention is also applicable to impact compactors which are self-propelled, i.e. which incorporate their own prime mover.
  • the impact compactor 10 includes a pair of three-sided compactor masses 14 of conventional design.
  • the masses 14 are mounted fast on a common shaft 16 which forms part of a tube axle assembly 18 seen in plan in Figure 2.
  • the tube axle assembly 18 includes a tube 20 to which a draglink 26 is connected, as illustrated.
  • the draglink 26 is connected by a droplink 28 ( Figure 4) to a wheeled carriage 30 which is hitched to the tractor 12.
  • the towed impact compactor 10 is of conventional design. It will also be appreciated that the traction assembly including the draglink and droplink is resilient in nature to absorb shock loading when the compactor masses are towed over the soil surface and apply impact blows thereto. Reference may be made to the disclosure in, for instance, WO 94/26985 for further details of the traction assembly for the compactor masses.
  • auxiliary drive arrangement includes a positive displacement hydraulic motor 32 mounted on a mounting plate 33 connected to the draglink 26, and a chain drive indicated diagrammatically in Figure 4 by the numeral 35.
  • the chain drive includes a sprocket 34 mounted on the output shaft of the motor 32.
  • a chain 36 represented diagrammatically in Figures 2 and 3 by a broken line, passes around the sprocket 34 and around a sprocket 38 mounted on a shaft 40 which is parallel to and above the shaft 16 and which is supported in inner and outer bearings 42 and 44 carried by the tube 20 of the tube axle assembly 18.
  • the ends of the shaft 40 carry sprockets 46. Further chains 47 pass around the sprockets 46 and around sprockets 48 connected to hubs 50 on which the compactor masses 14 are mounted. The masses 14 are omitted from Figures 1 to 3 in the interests of clarity of illustration.
  • the chain drive 35 also includes chain tensioners 52, 53 and 54 to maintain proper tension in the chains 36 and 47 and an idler sprocket assembly 56.
  • the motor of the tractor motor is indicated with the reference numeral 58 and the transmission with the numeral 60.
  • Driven wheels of the tractor are indicated with the numeral 62.
  • a variable displacement hydraulic pump 64 of conventional swash plate type is driven off the transmission 60.
  • the pump 64 supplies hydraulic fluid to the motor 32 under the control of a proportional valve 66 coupled to a sensor and associated electronic control (not shown) sensitive to the rotational, i.e. angular velocity, of the masses 14 and the driven wheels 62.
  • hydraulic fluid is pumped continuously to the motor 32 by the pump 64.
  • the valve 66 under electronic control, increases the rate of flow of hydraulic fluid to the motor 32.
  • the hydraulic motor 32 accordingly exerts additional rotational torque on the compactor masses and accelerates them rotationally so that their rotational velocity catches up with that of the wheels 62.
  • a velocity mismatch may, for instance, occur if one or other of the compactor masses digs into or slips relative to the soil surface rather than rotating about the next salient point, indicated in Figure 4 with the numeral 68, or if the action of a trailing levelling blade, indicated diagrammatically in Figure 4 with the numeral 70, should excessively increase resistance to forward motion of the impact compactor.
  • valve 66 decreases the supply of hydraulic fluid to the motor 32 to normal levels, and normal progress of the compactor masses resumes.
  • the impact compactor 10 has a hydrostatic drive control which automatically supplies extra rotary power to the compactor masses in the event of a velocity mismatch.
  • the sprocket 38 is mounted on the shaft 40 via a unidirectional clutch 72 which transmits rotary motion in one direction only and which freewheels in the other direction.
  • auxiliary drive is hydrostatic in nature.
  • the chain drive could be replaced by any other suitable system including, for instance, independent hydraulic drives at the hubs of the compactor masses.
  • the invention is not limited in scope to use with towed compactor masses and is equally applicable to self-propelled impact compactors incorporating their own prime movers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Architecture (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Soil Working Implements (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
  • Fertilizers (AREA)
  • Road Paving Machines (AREA)

Claims (9)

  1. Stoßverdichtungsgerät, welches mindestens eine unrunde Verdichtungsgerätmasse (14) umfasst, welche bei Betrieb durch ein primäres Antriebsmittel bei einer für den Normalbetrieb geeigneten Winkelgeschwindigkeit über eine Bodenfläche drehbar beweglich ist, um auf die Bodenfläche regelmäßig wiederkehrende Verdichtungsschläge auszuüben, wobei das Stoßverdichtungsgerät ein Hilfsantriebsmittel (32) beinhaltet, welches so angeordnet ist, dass es In Reaktion auf ein Absinken der Winkelgeschwindigkeit der bzw. jeder Verdichtungsgerätmasse unter eine für den Normalbetrieb geeignete Winkelgeschwindigkeit automatisch arbeitet, um einen Hilfsdrehantrieb auf die bzw. jede Verdichtungsgerätmasse auszuüben, um seine Winkelgeschwindigkeit auf eine für den Normalbetrieb geeignete Winkelgeschwindigkeit zurückzuführen.
  2. Stoßverdichtungsgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Hilfsantriebsmittel (32) einen durch das primäre Antriebsmittel angetriebenen hydrostatischen Antrieb sowie ein Steuermittel, welches auf die Winkelgeschwindigkeiten der Verdichtungsgerätmasse und der angetriebenen, bodenberührenden Räder des primären Antriebsmittels reagiert, zum Steuern des Betriebs des hydrostatischen Antriebs umfasst.
  3. Stoßverdichtungsgerät nach Anspruch 2, dadurch gekennzeichnet, dass der hydrostatische Antrieb einen durch eine Hydraulikpumpe (64) angetriebenen Hydraulikmotor, welcher bei Betrieb durch das primäre Antriebsmittel angetrieben wird, umfasst, wobei der Hydraulikmotor so angeordnet ist, dass er die bzw. jede Verdichtungsgerätmasse durch Kettenantriebsmittel (35, 36) antreibt
  4. Stoßverdichtungsgerät nach Anspruch 3, dadurch gekennzeichnet, dass das Steuermittel ein proportionales Ventil (66) umfasst, welches den Strom des Hydraulikfluids von der Hydraulikpumpe zum Hydraulikmotor unter der Kontrolle eines Sensors und zugehöriger Elektronik, welche auf die Winkelgeschwindigkeiten der Verdichtungsgerätmasse und der angetriebenen, bodenberührenden Räder des primären Antriebsmittels anspricht, regelt.
  5. Stoßverdichtungsgerät nach einem der Ansprüche 3 oder 4, welches ein Paar beabstandeter Verdichtungsgerätmassen (14), die fest an einer gemeinsamen Welle (16) zur synchronen Drehung angebracht sind, umfasst.
  6. Stoßverdichtungsgerät nach Anspruch 5, dadurch gekennzeichnet, dass die Verdichtungsgerätmassen an Naben (50) an den Enden der gemeinsamen Welle angebracht sind und das Kettenantriebsmittel ein durch den hydrostatischen Motor angetriebenes erstes Kettenrad (34), eine um das erste Kettenrad und um ein fest an einer Hilfswelle (40) angebrachtes zweites Kettenrad (146) umlaufende Kette (36) und ein Mittel zum Antreiben der Naben mittels der Hilfswelle umfasst.
  7. Stoßverdichtungsgerät nach Anspruch 6, dadurch gekennzeichnet, dass das Mittel zum Antreiben der Naben mittels der Hilfswelle dritte Kettenräder umfasst, die fest an der Hilfswelle angebracht sind und mit vierten Kettenrädern (48) greifen, die fest an den Naben angebracht sind.
  8. Stoßverdichtungsgerät nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Stoßverdichtungsgerät bei Betrieb an eine Zugmaschine (12), welche als primäres Antriebsmittel dient, ankoppelbar ist.
  9. Stoßverdichtungsgerät nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Stoßverdichtungsgerät sein eigenes primäres Antriebsmittel beinhaltet
EP98921620A 1997-05-15 1998-05-15 Bodenverdichtungsgerät Expired - Lifetime EP0983405B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ZA9704208 1997-05-15
ZA974208 1997-05-15
PCT/GB1998/001400 WO1998051866A1 (en) 1997-05-15 1998-05-15 Impact compactor

Publications (2)

Publication Number Publication Date
EP0983405A1 EP0983405A1 (de) 2000-03-08
EP0983405B1 true EP0983405B1 (de) 2002-03-27

Family

ID=25586406

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98921620A Expired - Lifetime EP0983405B1 (de) 1997-05-15 1998-05-15 Bodenverdichtungsgerät

Country Status (9)

Country Link
EP (1) EP0983405B1 (de)
JP (1) JP3773543B2 (de)
CN (1) CN1120270C (de)
AT (1) ATE215152T1 (de)
AU (1) AU732609B2 (de)
CA (1) CA2290465C (de)
DE (1) DE69804443T2 (de)
ES (1) ES2175709T3 (de)
WO (1) WO1998051866A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2216573T3 (es) 1998-11-09 2004-10-16 Compaction Technology (Soil) Limited Rodillo de compactacion.
CN103485261B (zh) * 2013-10-19 2015-06-03 浦江县杰浩进出口有限公司 一种路面加固设备
BR112018005908A2 (pt) * 2015-09-25 2018-10-16 Arnold Stromsoe Roger compactador de impacto bidirecional

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9310145D0 (en) * 1993-05-17 1993-06-30 Compaction Tech Soil Ltd Soil compaction
GB9422415D0 (en) * 1994-11-07 1995-01-04 Compaction Tech Soil Ltd Compaction of soil

Also Published As

Publication number Publication date
ES2175709T3 (es) 2002-11-16
AU732609B2 (en) 2001-04-26
CN1120270C (zh) 2003-09-03
JP2001525024A (ja) 2001-12-04
DE69804443T2 (de) 2003-01-02
ATE215152T1 (de) 2002-04-15
JP3773543B2 (ja) 2006-05-10
CN1261940A (zh) 2000-08-02
AU7440798A (en) 1998-12-08
CA2290465C (en) 2007-08-07
EP0983405A1 (de) 2000-03-08
CA2290465A1 (en) 1998-11-19
WO1998051866A1 (en) 1998-11-19
DE69804443D1 (de) 2002-05-02

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