EP0983405B1 - Compacteur à impacts - Google Patents
Compacteur à impacts Download PDFInfo
- 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
Links
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000005056 compaction Methods 0.000 claims abstract description 6
- 230000000737 periodic effect Effects 0.000 claims abstract description 3
- 230000002706 hydrostatic effect Effects 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
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)
- Compacteur à impacts comprenant au moins une masse de compactage (14) avec faux-rond, laquelle est mise en mouvement en rotation par des moyens d'entraínement primaires en utilisation, à une vitesse angulaire convenant pour le fonctionnement normal, sur la surface d'un sol afin d'appliquer des chocs de compactage périodiques sur la surface du sol, le compacteur à impacts comprenant des moyens d'entraínement auxiliaires (32) agencés de manière à fonctionner automatiquement, en réponse à une réduction de la vitesse angulaire de la ou de chaque masse de compactage au-dessous d'une vitesse angulaire convenant pour le fonctionnement normal, afin d'appliquer un entraínement de rotation auxiliaire à la ou à chaque masse de compactage afin de rétablir sa vitesse angulaire à celle qui convient pour le fonctionnement normal.
- Compacteur à impacts selon la revendication 1, dans lequel les moyens d'entraínement auxiliaires (32) comprennent un dispositif d'entraínement hydrostatique alimenté par les moyens d'entraínement primaires, et des moyens de commande qui réagissent aux vitesses angulaires de la masse de compactage et de roues motrices, en engagement avec le sol, des moyens d'entraínement primaires, afin de commander le fonctionnement de l'entraínement hydrostatique.
- Compacteur à impacts selon la revendication 2, dans lequel l'entraínement hydrostatique comprend un moteur hydraulique alimenté par une pompe hydraulique (64) qui est entraínée en utilisation par les moyens d'entraínement primaires, le moteur hydraulique étant agencé de manière à entraíner la ou chaque masse de compactage à l'aide de moyens d'entraínement à chaíne (35, 36).
- Compacteur à impacts selon la revendication 3, dans lequel les moyens de commande comprennent une valve proportionnelle (66) qui régule le flux de fluide hydraulique depuis la pompe hydraulique vers le moteur hydraulique sous la commande d'un détecteur et d'une unité électronique associée, sensible aux vitesses angulaires de la masse de compactage et de roues motrices, en engagement avec le sol, des moyens d'entraínement primaires.
- Compacteur à impacts selon l'une ou l'autre des revendications 3 et 4, comprenant une paire de masses de compactage écartées (14) montées solidaires sur un arbre commun (16) pour une rotation synchrone.
- Compacteur à impacts selon la revendication 5, dans lequel les masses de compactage sont montées sur des moyeux (50) aux extrémités de l'arbre commun, et les moyens d'entraínement à chaíne comprennent une première roue dentée (34) entraínée par le moteur hydrostatique, une chaíne (36) passant autour de la première roue dentée et autour d'une deuxième roue dentée (46) solidaire sur un arbre auxiliaire (40), et des moyens pour entraíner les moyeux à partir dc l'arbre auxiliaire.
- Compacteur à impacts selon la revendication 6, dans lequel les moyens pour entraíner les moyeux à partir de l'arbre auxiliaire comprennent des troisièmes roues dentées solidaires de l'arbre auxiliaire et en engrènement avec des quatrièmes roues dentées (48) solidaires des moyeux.
- Compacteur à impacts selon l'une quelconque des revendications précédentes, dans lequel le compacteur à impacts est attelable afin d'être utilisé sur un tracteur (12) qui sert de moyen d'entraínement primaire.
- Compacteur à impacts selon l'une quelconque des revendications 1 à 7, dans lequel le compacteur à impacts incorpore ses propres moyens d'entraínement primaires.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA974208 | 1997-05-15 | ||
ZA9704208 | 1997-05-15 | ||
PCT/GB1998/001400 WO1998051866A1 (fr) | 1997-05-15 | 1998-05-15 | Dispositif de compactage produisant des percussions |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0983405A1 EP0983405A1 (fr) | 2000-03-08 |
EP0983405B1 true EP0983405B1 (fr) | 2002-03-27 |
Family
ID=25586406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98921620A Expired - Lifetime EP0983405B1 (fr) | 1997-05-15 | 1998-05-15 | Compacteur à impacts |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0983405B1 (fr) |
JP (1) | JP3773543B2 (fr) |
CN (1) | CN1120270C (fr) |
AT (1) | ATE215152T1 (fr) |
AU (1) | AU732609B2 (fr) |
CA (1) | CA2290465C (fr) |
DE (1) | DE69804443T2 (fr) |
ES (1) | ES2175709T3 (fr) |
WO (1) | WO1998051866A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1131495B1 (fr) | 1998-11-09 | 2004-02-25 | Compaction Technology (Soil) Limited | Rouleau de compactage |
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 |
JP6470875B2 (ja) * | 2015-09-25 | 2019-02-13 | アーノルド ストロムソー、ロジャー | 衝撃圧縮機 |
Family Cites Families (2)
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 |
-
1998
- 1998-05-15 DE DE69804443T patent/DE69804443T2/de not_active Expired - Fee Related
- 1998-05-15 JP JP54894198A patent/JP3773543B2/ja not_active Expired - Fee Related
- 1998-05-15 WO PCT/GB1998/001400 patent/WO1998051866A1/fr active IP Right Grant
- 1998-05-15 CA CA002290465A patent/CA2290465C/fr not_active Expired - Fee Related
- 1998-05-15 AU AU74407/98A patent/AU732609B2/en not_active Ceased
- 1998-05-15 EP EP98921620A patent/EP0983405B1/fr not_active Expired - Lifetime
- 1998-05-15 ES ES98921620T patent/ES2175709T3/es not_active Expired - Lifetime
- 1998-05-15 AT AT98921620T patent/ATE215152T1/de not_active IP Right Cessation
- 1998-05-15 CN CN98806899A patent/CN1120270C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
AU732609B2 (en) | 2001-04-26 |
CA2290465C (fr) | 2007-08-07 |
AU7440798A (en) | 1998-12-08 |
JP3773543B2 (ja) | 2006-05-10 |
ATE215152T1 (de) | 2002-04-15 |
WO1998051866A1 (fr) | 1998-11-19 |
JP2001525024A (ja) | 2001-12-04 |
CA2290465A1 (fr) | 1998-11-19 |
DE69804443T2 (de) | 2003-01-02 |
CN1120270C (zh) | 2003-09-03 |
ES2175709T3 (es) | 2002-11-16 |
DE69804443D1 (de) | 2002-05-02 |
EP0983405A1 (fr) | 2000-03-08 |
CN1261940A (zh) | 2000-08-02 |
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