EP1258564A2 - Poutre dameuse avec mécanisme de commande automatique - Google Patents

Poutre dameuse avec mécanisme de commande automatique Download PDF

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Publication number
EP1258564A2
EP1258564A2 EP02005497A EP02005497A EP1258564A2 EP 1258564 A2 EP1258564 A2 EP 1258564A2 EP 02005497 A EP02005497 A EP 02005497A EP 02005497 A EP02005497 A EP 02005497A EP 1258564 A2 EP1258564 A2 EP 1258564A2
Authority
EP
European Patent Office
Prior art keywords
speed
tamping
signal
tamping mechanism
electronic control
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Withdrawn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
EP02005497A
Other languages
German (de)
English (en)
Other versions
EP1258564A3 (fr
Inventor
Timothy A. c/o Caterpillar Inc. Feucht
Evan T. c/o Caterpillar Inc. Graham
Timothy M. c/o Caterpillar Inc. Gutzwiller
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.)
Caterpillar Inc
Original Assignee
Caterpillar Inc
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 Caterpillar Inc filed Critical Caterpillar Inc
Publication of EP1258564A2 publication Critical patent/EP1258564A2/fr
Publication of EP1258564A3 publication Critical patent/EP1258564A3/fr
Withdrawn legal-status Critical Current

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    • 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
    • E01C19/30—Tamping or vibrating apparatus other than rollers ; Devices for ramming individual paving elements
    • E01C19/34—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight
    • E01C19/40—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers
    • E01C19/407—Power-driven rammers or tampers, e.g. air-hammer impacted shoes for ramming stone-sett paving; Hand-actuated ramming or tamping machines, e.g. tampers with manually hoisted dropping weight adapted to impart a smooth finish to the paving, e.g. tamping or vibrating finishers with elements or parts partly or fully immersed in or penetrating into the material to act thereon, e.g. immersed vibrators or vibrating parts, kneading tampers, spaders

Definitions

  • the present invention generally relates to asphalt paving machines, and more particularly to a control for a tamping mechanism on an asphalt paving machine.
  • Asphalt paving machines are used to spread asphalt relatively evenly over a desired surface. These machines are regularly used in the construction of roads, parking lots and other areas where a smooth durable surface is required for cars, trucks and other vehicles to travel.
  • An asphalt paving machine generally includes a hopper for receiving asphalt material from a truck and a conveyor system for transferring the asphalt from the hopper for discharge on the roadbed. Screw augers spread the asphalt transversely across the road bed in front of a floating screed, which is connected to the paving machine by pivoting tow arms or draft arms.
  • the screed smoothes and somewhat compacts the asphalt material and ideally leaves a roadbed of uniform depth and smoothness.
  • the screed is sometimes equipped with an eccentric bar that rotates and thereby causes the screed to vibrate, which assists with the compaction.
  • some screeds include a tamping mechanism which often includes a tamping bar, located in front of the screed, relative to the direction of travel of the paving machine, and transversely to the direction of travel.
  • the tamping bar moves up and down, striking the asphalt on each downward stroke thereby imparting increased compaction force on the asphalt.
  • the speed with which the tamping bar moves upward and downward is generally controlled by an operator input device such as a control knob.
  • Prior art tamping systems control only the frequency of the up and down motion of the tamping bar thereby causing the screed to tamp at a fixed rate. If the asphalt paving machine is moving at a constant speed the tamping bar will strike the asphalt the same number of times per unit distance traveled. Because the tamping bar strikes the asphalt the same number of times for every foot traveled, it is more likely to produce a uniformly dense roadbed. However, if the operator changes the speed of the asphalt paving machine the number of times the tamping bar strikes the asphalt per foot traveled will change, thereby increasing the likelihood that the density of the roadbed will be inconsistent.
  • the present invention includes a control system for use with a tamping mechanism on an asphalt paver.
  • the control system preferably includes an electronic control module that is connected with an operator input device for inputting a desired tamping frequency.
  • the electronic control module is also connected to a speed sensor that produces a signal indicative of the speed of the asphalt paver.
  • the electronic control module controls the speed of the tamping mechanism as a function of the operator input and the asphalt paver speed.
  • FIG. 1 a typical form of track-laying, floating screed asphalt paver 30 is shown.
  • the paver is provided with push rollers 31 at the front, for engaging and pushing forwardly on the wheels of a truck loaded with asphalt paving material.
  • the paving material is arranged to be discharged progressively from the truck into a hopper 32 at the front of the paver.
  • Conveyor means (not shown) controllably transport the paving material to the rear of the paver and deposit it in a mass 33 on the prepared paving bed 34.
  • Screw augers 35 distribute the paving material laterally in front of a screed, generally designated by the numeral 36.
  • the screed is towed behind the paver and connected thereto by a pair of elongated, forwardly extending tow bars 37 connected at their front ends to the chassis of the paver.
  • a level, uniform paving mat 39 is laid behind the paver as it advances forwardly.
  • the screed 36 comprises a baseplate 100 which is configured to float on paving material 33 laid upon a prepared paving bed 34 and to "smooth" or level and compact the paving material on the base surface, such as for example a roadway or roadbed.
  • the base plate 100 is connected, preferably by means of a carrier 105, to a vibrating shaft 110 coupled to a vibratory drive (not depicted).
  • the vibratory shaft 110 generally includes weights placed eccentrically so that when the vibratory drive rotates the vibrating shaft 110, the shaft 110 causes the screed 36 to vibrate.
  • the vibrating screed 36 to some degree improves compaction and quality of the asphalt mat being laid on the prepared paving bed 34.
  • the screed also includes a tamping mechanism 111 which includes a tamping bar 115 arranged in front of the baseplate 100 and extending generally transversely to the paving direction over substantially the entire width of the baseplate 100.
  • the tamping bar 115 is configured to be driven so as to move alternately in upward and downward directions (i.e., generally toward and away from the base surface).
  • the tamping bar 115 is driven by an eccentric drive 120 and is configured to be adjustably displaceable by the amount of an adjustable stroke of the eccentric drive 120.
  • a speed sensor 290 is preferably located adjacent the eccentric drive and produces a speed signal on an electrical connector 300 that is an input to an electronic control module 210, described in more detail below with reference to Figures 3 and 4.
  • the tamping bar 115 has a lead-in slope 125 located at the front edge of the bar 115.
  • the angle of the lead-in slope 125 is preferably between 30 degrees and 70 degrees, so as to ensure an optimum feed of the paving material.
  • the screed 36 has preferably includes a front wall 130 disposed proximal to the screw auger 35 (shown in Figure 1), the screw auger 35 functioning to spread paving material falling off the end of a conveyor mounted on the paver 30
  • the front wall 130 includes a lower guide portion 135 which is preferably inclined relative to the tamping bar 115 and which terminates adjacent to the bar 115, such that the guide portion 135 directs paving material from the auger 35 to the tamping bar 115.
  • the angle of inclination of the guide portion 135 preferably corresponds approximately to the angle of the lead-in slope 125 of the tamper bar 115.
  • the electronic control system preferably includes an electronic control module ("ECM") 210 connected with the various system components shown.
  • ECM electronice control module
  • a tamper bar mode selector 230 is connected with the ECM 210.
  • the tamper bar mode selector is shown as a three position toggle switch 240.
  • the mode selector 230 preferably includes three positions corresponding to an off mode, a manual mode and an automatic mode.
  • the operator of the asphalt paving machine preferably places the mode selector 230 in a position corresponding to the desired mode.
  • the mode selector then produces a mode signal on electrical connectors 250 indicative of the selected mode.
  • a tamper bar desired speed input 260 is connected with the ECM 210 by connector 270. Although this input is described herein as a desired speed input, it also controls the desired number of tamps per unit distance when the system is in the automatic mode. As shown in the drawing, the tamper bar desired speed selector is shown as a rotary dial 280. Preferably there are markings on the dial indicating to the operator a general desired tamping bar rotational velocity (when in manual mode) or a desired number of tamps per foot (when in automatic mode).
  • the operator of the asphalt paving machine moves the dial to a position corresponding to the desired rotational speed of the tamping bar or number of tamps per foot and the rotary dial 280 produces a signal on connector 270 indicative of the desired tamping bar speed or tamps per foot.
  • a tamping bar speed sensor 290 is associated with the eccentric drive 120 of the tamping mechanism 111 and produces a tamping bar speed signal on connector 300 indicative of the rotational velocity of the eccentric drive 120.
  • the tamping bar speed sensor is a passive sensor, such as a magneto restrictive type sensor.
  • other types of speed sensors can be used without deviating from the scope of the present invention.
  • the ECM 210 produces a tamper bar control signal 310 to control the rotational speed of the shaft eccentric drive 120.
  • the tamper bar control signal 310 is received by a solenoid 320 connected with a hydraulic pump 330 associated with the hydraulic motor 125.
  • the tamper bar control signal 310 controls the flow of hydraulic fluid through conduits 340,350 and thereby controls the rotational speed of the hydraulic motor 125 and eccentric drive 120 of the tamper bar.
  • the preferred embodiment shows the use of a hydraulic pump 330 and motor 125 to control the rotational speed of the eccentric drive 120, other power sources could readily and easily be substituted for the hydraulic motor without deviating from the scope of the present invention.
  • a asphalt paving machine speed sensor 360 that produces a signal on connector 370 indicative of the speed that the asphalt paving machine is travelling.
  • the speed sensor is preferably associated with a driveline on the asphalt paving machine, which connects the engine to the tracks, or other ground engaging device.
  • the speed sensor produces a signal indicative of the speed of the track, or other ground engaging device, which can be readily converted by the ECM 210 to ground speed. Any of a variety of well known speed sensors could be used in connection with the present invention.
  • FIG. 4 a block diagram of a preferred embodiment of the software control associated with the ECM 210 of the present invention is shown.
  • Software control begins in block 400 and passes to block 410.
  • the ECM 210 reads the signal on connectors 250 and determines whether the operator has placed the tamper bar mode selector 230 in the position corresponding to off mode. If the mode selected is the off mode then software control returns to block 400. Otherwise, program control continues to block 420.
  • software control determines whether the operator has placed the tamper bar mode selector 230 in the position corresponding to manual mode. If the mode selected is the manual mode then software control passes to block 430. Otherwise, software control passes to block 440.
  • the ECM 210 reads the desired tamping speed signal on connector 270 produced by the tamping bar desired speed input 260.
  • Program control then passes to block 470.
  • the ECM produces a tamper bar control signal as a function of the desired connector 270.
  • the speed of the tamper bar shaft 122 is controlled open loop.
  • the ECM 210 could readily and easily use the electrical connector 300 as feedback to implement a closed loop tamper bar speed control. From block 470 program control returns to block 400.
  • the ECM 210 reads the signal on connector 270, which in the automatic mode corresponds to a desired number of tamps per foot (or other unit distance) that the asphalt paving machine travels.
  • Program control then passes to block 460 where the ECM determines a corresponding desired tamping speed.
  • the ECM preferably reads the asphalt paving machine speed signal on connector 370 and calculates the desired tamping bar speed.
  • the control system of the present invention uses two asphalt paving speed sensors 360 and averages the signals of those two sensors. Program control then passes to 470.
  • the ECM produces a tamper bar control signal as a function of the desired connector 270.
  • the speed of the tamper bar shaft 122 is controlled open loop.
  • the control could readily and easily use the electrical connector 300 as feedback to implement a closed loop tamper bar speed control. From block 470 program control returns to block 400.
  • the control described in the present application permits the operator of the asphalt paving machine to select between three modes of tamping: an off mode; a manual mode; and an automatic mode.
  • the off mode the screed will not tamp the asphalt material.
  • the manual mode the operator can select a desired tamping speed which produces a desired tamping rate (i.e., a desired number of tamps per unit time).
  • the automatic mode the operator can select a desired number of tamps per unit distance.
  • the control will automatically adjust the tamping speed as a function of the speed that the asphalt paving machine is moving. This will allow the operator to better achieve consistent compaction from the tamper bar with minimum operator action.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP02005497A 2001-05-14 2002-03-11 Poutre dameuse avec mécanisme de commande automatique Withdrawn EP1258564A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/854,823 US20020168226A1 (en) 2001-05-14 2001-05-14 Automatic tamping mechanism control
US854823 2001-05-14

Publications (2)

Publication Number Publication Date
EP1258564A2 true EP1258564A2 (fr) 2002-11-20
EP1258564A3 EP1258564A3 (fr) 2003-09-10

Family

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Family Applications (1)

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EP02005497A Withdrawn EP1258564A3 (fr) 2001-05-14 2002-03-11 Poutre dameuse avec mécanisme de commande automatique

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US (1) US20020168226A1 (fr)
EP (1) EP1258564A3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577443A1 (fr) * 2004-03-18 2005-09-21 BITELLI S.p.A. Poutre vibrante pour finisseuse de route
EP2366831A1 (fr) 2010-03-18 2011-09-21 Joseph Vögele AG Procédé de commande du procédé lors de la application d'un revêtement routier et finisseuse de route
US10246834B1 (en) 2017-11-20 2019-04-02 Caterpillar Paving Products Inc. Tamper bar and wear plate for screed assembly of paving machine

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2515660A1 (fr) * 2004-08-11 2006-02-11 Dirk Heims Poutre lisseuse de pavage vibrante pour finisseur
GB0513899D0 (en) 2005-07-06 2005-08-10 Airbus Uk Ltd Program-controlled process
US7484911B2 (en) * 2006-08-08 2009-02-03 Caterpillar Inc. Paving process and machine with feed forward material feed control system
US20090304446A1 (en) * 2008-06-04 2009-12-10 Kevin Pikuet Tamper Assembly
EP2182117A1 (fr) * 2008-10-31 2010-05-05 Caterpillar Paving Products Inc. Contrôleur de compacteur vibrant
US7682102B1 (en) * 2009-04-23 2010-03-23 Gary Burke Asphalt tamper
EP2325392B1 (fr) * 2009-11-20 2020-09-30 Joseph Vögele AG Procédé de pavage et poutre finisseuse
PL2366830T3 (pl) * 2010-03-18 2016-11-30 System i sposób dla nanoszenia nawierzchni drogowej
EP2366832B1 (fr) * 2010-03-18 2015-09-23 Joseph Vögele AG Procédé et finisseuse de route destinés à la réalisation d'une couche de revêtement compactée
US8469630B2 (en) 2011-11-10 2013-06-25 Sauer-Danfoss Inc. Sensor system for construction equipment having wireless sonic sensor system
US8371770B1 (en) 2012-04-09 2013-02-12 Caterpillar Inc. Apparatus for tamping paving material
US8944719B2 (en) * 2012-11-09 2015-02-03 Caterpillar Paving Products Inc. Tracking of machine system movements in paving machine
US9441334B1 (en) * 2015-08-05 2016-09-13 Caterpillar Paving Products Inc. Towpoint speed control for a paving machine
DE102015016777A1 (de) * 2015-12-23 2017-06-29 Bomag Gmbh Stampferleistenvorrichtung einer Einbaubohle, Einbaubohle, Straßenfertiger sowie Verfahren zum Verändern des Hubs einer Stampferleistenvorrichtung
CN108643016A (zh) * 2018-07-26 2018-10-12 四川创新亿建筑工程有限公司 下料抚平夯实机
US10889944B2 (en) * 2018-08-28 2021-01-12 Caterpillar Paving Products Inc. Control system for controlling operation of compaction systems of a paving machine
EP4029992B1 (fr) 2021-01-14 2023-03-29 Joseph Vögele AG Finisseur de route et procédé de réglage de la course de dameur
EP4029991B1 (fr) * 2021-01-14 2023-05-10 Joseph Vögele AG Réglage de la course du dameur
GB2604350A (en) * 2021-03-01 2022-09-07 Black & Decker Inc A compacting power tool
CN113481781B (zh) * 2021-06-17 2022-06-28 于普 一种路基快速高效夯筑机械设备
CN115652993B (zh) * 2022-09-26 2024-08-13 中国一冶集团有限公司 一种砖胎膜支撑、打夯装置及回填土夯实方法
US20240417935A1 (en) * 2023-06-14 2024-12-19 Caterpillar Paving Products Inc. Systems and methods for improving a density quality of a paving material mat laid by a paving machine
CN223118803U (zh) * 2023-08-04 2025-07-18 维特根有限公司 滑模摊铺机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1459670A1 (de) * 1964-11-26 1968-11-21 Abg Werke Gmbh Einbaumaschine fuer den Strassenbau
DE4040029C1 (fr) * 1990-12-14 1992-04-23 Joseph Voegele Ag, 6800 Mannheim, De

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1577443A1 (fr) * 2004-03-18 2005-09-21 BITELLI S.p.A. Poutre vibrante pour finisseuse de route
EP2366831A1 (fr) 2010-03-18 2011-09-21 Joseph Vögele AG Procédé de commande du procédé lors de la application d'un revêtement routier et finisseuse de route
CN102304887A (zh) * 2010-03-18 2012-01-04 约瑟夫福格勒公司 在铺设材料时用于控制过程的方法和道路修整机
US8454266B2 (en) 2010-03-18 2013-06-04 Joseph Vogele Ag Method for controlling the process when producing a paving mat and road finisher
CN102304887B (zh) * 2010-03-18 2015-07-22 约瑟夫福格勒公司 在铺设材料时用于控制过程的方法和道路修整机
US10246834B1 (en) 2017-11-20 2019-04-02 Caterpillar Paving Products Inc. Tamper bar and wear plate for screed assembly of paving machine

Also Published As

Publication number Publication date
US20020168226A1 (en) 2002-11-14
EP1258564A3 (fr) 2003-09-10

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