EP2650443B1 - Machine à fraiser la chaussée avec commande pour la réalisation du parallélisme du cadre de la machine par rapport au sol - Google Patents

Machine à fraiser la chaussée avec commande pour la réalisation du parallélisme du cadre de la machine par rapport au sol Download PDF

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Publication number
EP2650443B1
EP2650443B1 EP13154680.6A EP13154680A EP2650443B1 EP 2650443 B1 EP2650443 B1 EP 2650443B1 EP 13154680 A EP13154680 A EP 13154680A EP 2650443 B1 EP2650443 B1 EP 2650443B1
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EP
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Prior art keywords
machine frame
milling
ground
relative
traffic surface
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EP13154680.6A
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German (de)
English (en)
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EP2650443A2 (fr
EP2650443A3 (fr
Inventor
Christian Berning
Dieter Simons
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Wirtgen GmbH
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Wirtgen GmbH
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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
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums

Definitions

  • the invention relates to a self-propelled road construction machine according to the preamble of claim 1.
  • the machine frame is carried by a chassis with wheels or crawler tracks that are connected to the machine frame via lifting columns, the lifting columns making it possible to adjust the machine frame to a certain level, parallel to the floor or with a predetermined longitudinal and / or transverse inclination.
  • a milling drum for processing a floor or traffic area is mounted on the machine frame.
  • height-adjustable side plates are provided as edge protection on an outer wall of the road milling machine, which, during operation, rest on the non-milled edges of the milling track on the ground or traffic area.
  • a height-adjustable stripping device In the direction of travel behind the milling drum there is a height-adjustable stripping device that can be lowered into the milling track created by the milling drum during operation in order to remove any milling material remaining in the milling track.
  • the road milling machine also has a control device to control the milling depth of the milling drum and to control the setting of the lifting columns.
  • the problem with the known road milling machines is that if the machine frame does not run parallel to the ground, the scraper behind the milling drum does not lie so precisely that the machined surface can be removed without leaving any residue. Furthermore, there is the problem that the belt shoe that surrounds the conveyor belt does not lie flat when the machine frame is not parallel to the floor, which means that milled material can sit between the belt shoe and the unprocessed floor surface, or that the function as a hold-down device is insufficiently fulfilled, causing clods to form of the milling drum and place it under the belt shoe. There is also the problem that the control of the milling depth is not sufficiently accurate and that for this reason the milling depth has to be repeatedly measured manually during the milling process.
  • the tools are subject to high wear, so that the set milling depth is falsified by the decreasing cutting circle diameter.
  • the wear of the tools when milling concrete can cause a difference in the milling radius of 15 mm after just a few 100 m, so that a measurement of the displacement e.g. of side plates relative to the machine frame is not sufficiently accurate. If the milling depth is not sufficient, the milling track must be reworked in a time-consuming process. If the milling track is too deep, more building material must then be re-applied in order to achieve the desired floor or traffic surface level.
  • the invention is therefore based on the object of simplifying the operation of the road milling machine and improving the milling process.
  • the invention advantageously provides that the control automatically regulates the lifting state of at least one rear and / or front lifting column in the direction of travel to produce the parallelism of the machine frame to the floor or traffic area or to a predetermined milling plane.
  • the invention can also be used for recycling machines.
  • the solution according to the invention has the advantage that the parallelism of the machine frame to the ground or traffic surface is set automatically and the operator does not have to readjust this parallel position himself, in particular not even after a milling depth control that has also taken place automatically. Because the machine frame is held parallel to the processed or unprocessed floor or traffic area, the proper functioning of other machine elements, e.g. the scraper and the belt shoe, is guaranteed. In this way, operational disruptions are avoided, which arise from an inaccurate setting of the parallel position, material can settle under the belt shoe, clods are thrown up, or the already milled surface cannot be removed cleanly.
  • the vehicle driver can concentrate on the actual milling process and is not distracted by manual control processes.
  • the control can determine the longitudinal inclination of the machine frame relative to the worked or unworked soil to produce the parallelism of the machine frame to the ground or traffic area.
  • the longitudinal inclination can be determined from at least two distance values offset from one another in the direction of travel between the machine frame and the processed or unprocessed soil.
  • the longitudinal inclination can be determined from at least one first distance value between the machine frame and the processed soil and at least one second distance value offset from the first in the direction of travel between the machine frame and the unprocessed soil in conjunction with a measured value for the milling depth.
  • the first or the second distance value between the machine frame and the processed or unprocessed soil can be derived from the position of one of the or unprocessed ground running crawler tracks can be determined in relation to the machine frame.
  • the longitudinal inclination can be determined from a first distance value between the machine frame and the processed soil and a second distance value between the machine frame and the processed soil, the second distance value from the position of the stripping device or from the position of at least one of the chain drives running on the processed soil in relation to the machine frame can be determined.
  • a conveyor belt can be attached to the machine frame, with a belt shoe receiving the roller-side end of the conveyor belt, which is provided for transporting away the milled material.
  • the longitudinal inclination can be determined from at least a first distance value between the machine frame and the unprocessed ground and a second distance value between the machine frame and the unprocessed ground, the second distance value from the position of the belt shoe or from the position of at least one of the track drives running on the unprocessed ground or from the Position of at least one of the side plates can be determined.
  • the distance values between the machine frame and the processed or unprocessed soil can be determined with the aid of distance measuring systems.
  • the position measuring systems can be integrated in the lifting columns or in the hydraulic cylinders of the lifting columns.
  • the longitudinal inclination of the machine frame can be determined in relation to the unprocessed floor from the relative angle in the direction of travel between a side plate resting on the floor and the machine frame.
  • the longitudinal inclination of the machine frame can be determined in relation to the processed or unprocessed soil by the relative angle between at least one lifting column running orthogonally to the machine frame and the running gear running parallel to the ground.
  • the automatic production of the parallelism of the machine frame in relation to the processed or unprocessed soil can only take place by the control when the control makes readjustment of the milling depth or a setting of a predetermined milling depth.
  • the control can decide whether the lifting status of the front and / or the rear lifting columns is regulated to adapt to the milling depth.
  • the automatic production of the parallelism of the machine frame in relation to the processed or unprocessed soil can be carried out by the control independently of the regulation of the milling depth.
  • the control can regulate the milling depth of the milling drum on both sides of the machine frame, viewed in the direction of travel, independently of one another.
  • At least one measuring device can detect the elevation of a first sensing device resting on the ground or traffic area to be processed and / or the lowering of a second sensing device on the surface of the milling track based on the current milling depth, with the control system measuring the milling depth from the measured values of the at least one measuring device determined by the milling drum.
  • the lifting state of the rear and front lifting columns in the direction of travel can be changed to produce the parallelism of the machine frame to the floor or traffic area or to the predetermined milling plane so that the machine frame can be pivoted about the milling drum axis.
  • a method for producing the parallelism of the machine frame to the ground or traffic area or to a predetermined milling plane in road milling machines, in which a ground or traffic area is milled with the help of a milling drum by lowering the road milling machine for milling according to the specified milling depth with the milling drum, the determination of the longitudinal inclination of the machine frame relative to the processed or unprocessed soil by recording measured values, and the automatic Control of the lifting condition of at least one rear and / or front lifting column in the direction of travel to produce the parallelism of the machine frame to the ground or traffic area or to the predetermined milling plane as a function of the longitudinal inclination of the machine frame.
  • At least one measuring device can be provided which, based on the current milling depth, detects the raising of a first sensing device resting on the ground or traffic area and / or the lowering of a second sensing device to the bottom of the milling track. From the measured values of the at least one measuring device, the control can determine the milling depth at the level of the stripping device of the milling drum or the second sensing device.
  • the measurement is preferably carried out at the level of the stripping device, which is arranged close behind the milling drum or directly behind the stripping device in the case of a separate sensing device.
  • the second sensing device can consist of the stripping device.
  • the use of the stripping device as a scanning device has the advantage that there are no measurement errors due to unevenness in the milling track. Another advantage is that the stripping device is protected against wear at its lower edge.
  • control can determine the current milling depth of the milling drum at the level of the milling drum axis from the measured values of the at least one measuring device. This is preferably done with the help of a calculation that can also take into account an inclined position of the machine frame.
  • the measuring devices preferably consist of displacement measuring devices.
  • the first sensing device consists of at least one of the side plates which are adjustable in height and pivotably arranged on both sides of the front sides of the milling drum relative to the machine frame.
  • the side plates rest on the floor or traffic area or are pressed against them, so that their change in position relative to the machine frame during operation enables precise milling depth detection if the change in position of a second sensing device is also measured in the milling track relative to the machine frame.
  • the measuring devices can have cable pulls and cable pull sensors coupled to the first scanning device and / or the second scanning device as displacement measuring devices.
  • the side plates also have the advantage that their lower edges are protected against wear.
  • the measuring devices can have cables coupled to the side plates and / or the stripping device and associated cable sensors as displacement measuring devices, which measure the change in the position of the side plates and the stripping device relative to the machine frame or the relative displacement of at least one of the side plates in relation to the stripping device or the second sensing device.
  • the arrangement of the cable pulls coupled to the side plates and the stripping device in a substantially vertical plane running approximately at the level of the stripping device is preferred, transversely to the milling track.
  • a cable pull is coupled on the one hand to the stripping device and on the other hand to at least one of the side plates via a pulley, such that a cable sensor directly measures the milling depth, for example on the pulley.
  • the measuring devices can detect the displacement of the first sensing device relative to the second sensing device or the displacement of the first and the second sensing device in each case relative to the machine frame.
  • the stripping device has a measuring device on the side edges facing the side plates, which measures the relative displacement of the stripping device to the at least one adjacent side plate or the relative displacement of at least one side plate to the stripping device.
  • the stripping device can have at least one height-adjustable bar that is vertically and linearly guided in the stripping device and running transversely to the direction of travel as the first sensing device, which rests next to the milling track on the ground or traffic area and its position relative to the stripping device, preferably with regard to Height and / or inclination, can be measured by the measuring device.
  • the side plates can rest on the edges of the floor or traffic area next to the milling track milled by the milling machine, or alternatively, they can be pressed onto the edges by hydraulic devices.
  • the stripping device can also be pressed onto the surface of the milling track with the aid of hydraulic devices.
  • the hydraulic devices for pressing the side plates onto the floor or traffic area or for pressing the stripping device on the floor of the milling track can have integrated displacement measurement systems.
  • the control calculates the current milling depth from the relative difference between the positions of the stripping device and the at least one first sensing device.
  • the control which receives the distance measurement signals from the measuring device, can automatically regulate the lifting status of the rear lifting columns in the direction of travel to produce the parallelism of the machine frame to the ground or traffic area of a desired milling depth.
  • the side plates pivotable on the traffic area relative to the machine frame can have measuring devices arranged at a distance from one another in the direction of travel, whereby the control can measure the longitudinal inclination and / or transverse inclination of the machine frame to the ground or traffic area from the difference between the measuring signals of the side plates and the stripping device.
  • the front and / or rear lifting columns can have a displacement measuring system for detecting the lifting state.
  • the control which receives the distance measurement signals from the measuring device, can regulate the state of all lifting columns in such a way that the machine frame has a predetermined inclination or a predetermined distance-dependent transverse slope profile transverse to the direction of travel.
  • the current setpoint value for the milling depth of the milling drum is preferably set with the aid of the front lifting columns.
  • the current setpoint for the milling depth of the milling drum can be set using the front lifting columns.
  • the control which receives the measurement signals of all measuring devices, sensing devices, i.e. for example the side plates and / or stripping devices, and / or the belt shoe and / or all lifting columns, can be dependent on the displacement measurement signals of the measuring devices and / or on the desired location-dependent change in a setpoint for set the milling depth in the course of the machined path, the lifting position of the lifting columns resulting therefrom.
  • the zero level of the measuring signals of the measuring devices (16) can be adjustable on the unmilled ground or traffic area.
  • Each lifting column can have a carrier for a wheel or a track drive at the lower end, and a distance sensor can measure the distance of the carrier to the ground and traffic area and a measurement signal to a controller for the lifting position of the lifting columns and / or to a controller for the Send the milling depth of the milling drum.
  • the milling drum can extend essentially over the entire working width of the machine frame.
  • the milling drum can be mounted in a height-adjustable manner in the machine frame.
  • the control can calculate the current milling depth from the distance measurement signals received and generate a control signal for the height adjustment of the milling drum.
  • the measurement of the milling depth of the milling track can be measured by recording the measured values of at least one first, the position of the unprocessed ground and traffic area scanning sensing device in relation to the measured values of a second sensing device scanning the position of the bottom of the milling track or by measuring the measured values of both sensing devices in relation to the machine frame.
  • the side edges next to the milling track can be held down by side plates and that at least one of the side plates can be used as the first sensing device, the scraper plate being used as the second sensing device for peeling off the milled surface.
  • the method can also correct the measured milling depth value as a function of the distance between the second sensing device and the The axis of rotation of the milling drum if the machine frame of the road milling machine does not run parallel to the ground or traffic area.
  • the road milling machine shown has a machine frame 4 which is supported by a running gear with two front track drives 2 and at least one rear track drive 3.
  • the track drives 2, 3 are connected to the machine frame 4 via lifting columns 12, 13. It goes without saying that instead of the crawler tracks 2, 3, wheels can also be used.
  • the machine frame 4 can be raised or lowered or brought into a predetermined inclined position relative to the ground or traffic area 8 to be processed.
  • the milling drum 6 mounted in the machine frame 4 is surrounded by a roll box 9, which is open at the front in the direction of travel to a first conveyor belt 11, which transfers the milled material in the front area of the machine frame 4 to a second conveyor 13.
  • the second transport device 13, with which the milled material can be dropped onto a truck, for example, is shown in FIG Fig. 1 not shown in full because of its length.
  • a height-adjustable stripping device 14 which, during operation, engages with a scraper blade 15 in the milling track 17 generated by the milling drum 6 and pulls off the bottom of the milling track 17 so that there is no more milled material behind the scraper blade in the milling track 17 is located.
  • control stand 5 with a control panel for the vehicle driver for all control functions of the driving and milling operations.
  • This also includes a control device 23 for controlling the milling depth of the milling drum 6.
  • the side plates 10, arranged on both sides near the end face of the milling drum 6, and the stripping device 14 are provided with measuring devices 16 which enable the determination of the current milling depth at the level of the stripping device 14 or the calculation of the milling depth at the level of the axis of rotation of the milling drum.
  • the milling depth is determined in a plane orthogonal to the ground or traffic area, which runs parallel to the axis of rotation of the milling drum and in which the axis of rotation lies.
  • a first sensing device for example the side signs 10, on the floor or traffic area 8 and / or the lowering of a second sensing device, for example the stripping device
  • Measuring devices 16 preferably consisting of displacement measuring devices, measure the displacements the sensing devices, for example the side plates 10 or a bar 20 or the scraper plate 15 in relation to the machine frame 4 or in relation to one another.
  • the embodiment of the Fig. 2 shows a bar 20 as a sensing device which rests on the floor or traffic surface 8 and which is guided to the scraper blade 15 of the scraper device in a slot 24 running linearly and orthogonally to the lower edge 19 of the scraper blade 15. It goes without saying that two mutually parallel slots 24 can also be provided in the scraper blade 15, or that the bar 20 as a sensing device can be guided in a height-adjustable manner on the scraper device 14 in a different manner.
  • the measuring device 16 in the form of a displacement measuring device detects the displacement of the bar 20 in relation to the stripping device 14.
  • Fig. 3 shows a further embodiment in which the scraper blade 15 of the scraper device 14 can be moved up and down with the aid of hydraulic devices.
  • the hydraulic devices consist of piston-cylinder units 26, 28 with an integrated position measuring system. This means that the piston-cylinder units 26, 28 not only enable the lifting movement of the stripping device, but also generate a path signal.
  • piston-cylinder units 26, 28 are coupled at one end to the machine frame 4 and at the other end to the scraper blade 15.
  • Fig. 4 shows an embodiment in which the relative movement between the side plates 10 and the scraper plate 15 is measured directly in order to detect the milling depth of the milling track 17.
  • elements 38, 40 of the measuring device 16 are arranged, for example, on the side plates 10 and in each case opposite on the scraper plate 15, which record the relative displacement of the scraper plate 15 in relation to the side plates 10 allow. This shift corresponds to the milling depth s in Fig. 4 .
  • a measuring device which measures the relative displacement, can consist of an optical system, for example by reading a scale with an optical sensor, or an electromagnetic or inductive system.
  • the relative displacement measuring system between the side plates 10 and the scraper plate 15 also consist of a cable 22 in combination with a cable sensor 21.
  • the cable 22 is coupled on the one hand to the stripping plate 15 of the stripping device 14 and on the other hand to at least one of the side plates 10 via a pulley 35 so that the signal from the cable sensor 21 can directly display the current milling depth value.
  • the side plates 10 can themselves be used as a first sensing device by monitoring their position with the aid of a cable and a cable sensor or with the aid of piston-cylinder units 30, 32 with integrated displacement measuring devices in relation to the machine frame 4 or the second sensing device.
  • the measuring devices can also measure the displacement of the side plates 10 in relation to the machine frame 4.
  • the longitudinal inclination of the machine frame 4 in relation to the ground or traffic area 8 or, by comparing the measured values of both side plates 10 on both sides of the milling drum 6, the transverse inclination of the machine frame 4 to be determined.
  • Fig. 6 showed a preferred embodiment in which on both sides of the stripping device 15 cable pulls 22 with cable pull sensors 21 attached to the machine frame 4 are arranged.
  • the side plates 10 are also provided with cables 22 and cable sensors 21 attached to the machine frame 4, to be precise on both sides of the machine.
  • the milling depth s is determined from the difference between the measured values of the cable sensors 21 for the side plates 10 and the cable sensors 21 of the stripping device 15. The measurement should preferably be take place in the same essentially vertical plane in order to avoid measurement errors.
  • Figs. 7a to 7c the cable sensors 21 for the side plates 10 and the stripping plates 14 are shown, with only one cable sensor 21 being indicated in the drawings because the cable sensors are essentially one behind the other in the same plane.
  • Figures 7a, b, c are intended to illustrate the case in which the floor or traffic area 8 does not run parallel to the machine frame 4, with the milling depth measurement value displayed by the measuring devices having to be corrected due to an angular error, since a longitudinal inclination of the machine frame 4 results in the measurement signal at the level of the scraper plate 15 or a second sensing device in the vicinity of the stripping device 15 is falsified. Due to the fixed geometric relationships, namely the distance of the scraper blade 15 from the axis of rotation of the milling drum 6, the measured milling depth value can be corrected and the current milling depth calculated at the height of the milling drum axis if the angular deviation from the horizontal in the direction of travel is known. The angular deviation in the direction of travel can be determined, for example, from the position of the lifting columns 12, 13 of the crawler tracks 2, 3 or of the piston-cylinder units 30, 32.
  • Figure 7c shows the position of the at least one side plate 10 with the machine frame 4 in a position parallel to the floor Figures 7a to 7c
  • the scraper blade 15 shown is located on the roller box 9, so that the distance between the scraper blade 15 and the axis of rotation of the milling drum 6 can be clearly determined in order to enable the milling depth correction to be calculated when the machine frame 4 is not parallel to the ground.
  • the controller 23 can calculate the current milling depth at the height of the milling drum axis from the path measurement signals received and, if necessary, also generate a control signal for the height adjustment of the milling drum 6.
  • the controller 23 can preferably automatically regulate the lifting state of the at least one lifting column 13, which is front and / or rear in the direction of travel, to produce the parallelism of the machine frame 4 to the floor or traffic area 8 or to the horizontal or to a predetermined desired milling plane.
  • all of the previously described measuring devices can also be used to determine the angular position or longitudinal inclination to regulate the parallelism of the machine frame 4 to the floor surface.
  • Fig. 8 shows a schematic representation of a preferred embodiment of a hydraulic circuit diagram of a road construction machine 1.
  • the four lifting columns 12, 13 are each assigned actuators, which enable the height adjustment of the respective lifting column 12, 13.
  • the actuators are designed as working cylinders 40, 42, 44, 46 in the lifting columns.
  • Each working cylinder 40, 42, 44, 46 has a first working chamber 48, 52, 56, 60 and a second working chamber 50, 54, 58, 62.
  • the respective first working chamber 48, 52, 56, 60 is separated from the respective second working chamber 50, 54, 58, 62 by a respective piston.
  • An increase in volume of the respective first working chamber 48, 52, 56, 60 and a simultaneous reduction in volume of the respective second working chamber 50, 54, 58, 62 result in an extension of the respective lifting column 12, 13 and, associated therewith, a lowering of the respective chassis.
  • the first working cylinder 40 is the actuator for the front left lifting column
  • the second working cylinder 42 is the adjusting element for the front right lifting column
  • the third working cylinder 44 is the adjusting element for the rear right lifting column
  • the fourth working cylinder 46 is the adjusting element for the rear lifting column Left.
  • the first working chamber 48 of the first working cylinder 40 is connected to the first working chamber 60 of the fourth working cylinder 46 via a connecting line 68 connected.
  • the second working chamber 50 of the first working cylinder 40 is connected to the second working chamber 54 of the second working cylinder 42 via a connecting line 64.
  • the first working chamber 52 of the second working cylinder 42 is connected to the first working chamber 56 of the third working cylinder 44 via the connecting line 70.
  • the second working chamber 58 of the third working cylinder 44 is in turn connected to the second working chamber of the fourth working cylinder 46 via the connecting line 66.
  • the working cylinders 40, 42, 44, 46 thus form a closed system via the connecting lines 64, 66, 68, 70, as a result of which driving comfort and stability of the road construction machine 1 are improved.
  • the connecting line 68 is connected to a connection B of a first 4/3 way valve 84 via a further connecting line 72.
  • a 4/3-way valve has four connections and three switching positions.
  • a second connection T of the first 4/3 way valve 84 is connected via a connecting line 76 to a connection T of a second 4/3 way valve 86.
  • the connecting line 76 is connected to a pressure medium sump 80 via a working line 87.
  • a third connection P of the first 4/3-way valve is connected to a second connection P of the second 4/3-way valve 86 via the connecting line 78.
  • a working line 79 is connected to the connecting line 78, an oil pump being provided in the working line 79.
  • the working line 79 also opens into the pressure medium sump 80 at the other end.
  • a third connection B of the second 4/3 way valve 86 is connected to the connecting line 70 via a connecting line 77.
  • a fourth port A of the first 4/3 way valve 84 is connected to a fourth port A of the second 4/3 way valve 86 via the connecting line 96.
  • the connecting line 64 is connected via the connecting line 75 to a connection of a 2/2-way valve 94 (two connections, two switching positions).
  • the second connection of the first 2/2-way valve 94 is connected to a connection of a check valve 92 for the connecting line 98.
  • the other connection of the check valve 92 is connected to the connecting line 96 via the connecting line 81.
  • the check valve 92 is for Fluid flows from the connecting line 81 to the connecting line 98 are blocked.
  • the connecting line 96 is also connected to a connection of a further check valve 90 via the connecting line 83.
  • the other connection of the check valve 90 is connected to a connection of a further 2/2-way valve 88 via the connecting line 100.
  • the other connection of the 2/2-way valve 88 is connected to the connecting line 66 via the connecting line 74.
  • the check valve 90 blocks fluid flows from the connecting line 100 to the connecting line 83.
  • the controller 23 regulates the adjustment of the working cylinders 40, 42, 44, 46 and thus the extension and retraction of the lifting columns 12, 13.
  • the milling depth is set by extending and retracting the lifting columns 12, 13.
  • the milling depth of the milling drum 6, viewed in the direction of travel can be regulated independently of one another on both sides of the machine frame 4, since only the left working cylinders 40, 46 or the right working cylinders 42, 44 can be moved.
  • the controller 23 regulates the parallelism of the machine frame 4 to the ground or traffic area 8 in the preferred exemplary embodiment according to Fig. 8 only when the controller 23 readjusts the milling depth or a setting of a predetermined milling depth.
  • the controller 23 decides whether the front working cylinders 40, 42 and thus the front lifting columns 12 or the rear working cylinders 44, 46 and thus the rear lifting columns 13 are to be adjusted.
  • the production of the parallelism of the machine frame 4 to the floor or traffic area 8 is therefore not actively regulated by the controller 23, but rather passively, in that a decision is made when the milling depth is currently being readjusted or a new target value is set for a predetermined milling depth, whether the amount of oil flowing through the two 4/3-way valves 84, 86 is directed into the front working cylinders 40, 42 and thus the front lifting columns 12 or the rear working cylinders 44, 46 and thus the rear lifting columns 13. Alternatively, the amount of oil can be added to both the front and the the rear working cylinders 40, 42, 44, 46 are guided simultaneously, whereby the front and rear lifting columns 12, 13 are adjusted.
  • Fig. 9 shows the arrangement of a belt shoe 122 on a larger scale.
  • a belt shoe 122 is fastened to the machine frame 4 in a height-adjustable manner.
  • a piston-cylinder unit 108 fastened to the machine frame 4 is provided for adjusting the height of the belt shoe 122. With the help of this piston cylinder unit, the belt shoe can be lifted in the vertical direction, for example to overcome obstacles.
  • the band shoe 122 has ground contact on the underside. When the milling depth is increased, the position of the belt shoe 122 adjusts itself automatically through contact with the ground.
  • the belt shoe 122 receives the end of the conveyor device 102 on the milling drum side.
  • the support of the rear end of the conveyor 102 is a fixed point between the belt shoe 122 and the conveyor 102.
  • connecting struts 128 are provided on both sides, which prevent the belt shoe 122 from pivoting relative to the conveyor 102.
  • the conveyor device preferably consists of a conveyor belt 11.
  • the belt shoe 122 consists of a grate 120 parallel to the floor, which serves as a hold-down device and as a sliding shoe.
  • the grate 120 consists of several grate bars aligned parallel to the direction of travel.
  • the grate 120 is laterally bounded by vertical side walls 124.
  • a front area 126 extends approximately parallel to the conveyor belt 11 of the conveyor device 102.
  • At the rear end of the belt shoe there is a protective shield 121 to protect the conveyor belt 11, which prevents the conveyor belt 11 from being damaged by sharp-edged material.
  • a shield 118 inclined slightly in the direction of travel is recessed in the upper region in a U-shape in order to form a passage opening for the processed material.
  • Distance measuring systems such as ultrasonic sensors or draw-wire sensors, can be attached directly to the belt shoe 122 or integrated in the piston-cylinder unit 108.
  • the distance values between the machine frame 4 and the unprocessed soil can be determined with the aid of the displacement measuring systems on the belt shoe 122.
  • a road milling machine 1 is shown, the machine frame 4 of which is not aligned parallel to the ground surface 8.
  • the lifting columns 12, 13 are mounted at the lower end in joints 43 on the respective chain drives 2, 3.
  • rotation angle sensors can be provided on the joints 43, which detect the relative angle between the lifting columns 12, 13 running orthogonally to the machine frame 4 and the chain drives 12, 13 running parallel on the floor surface.
  • one of the side plates 10 can also have an angle of rotation sensor which detects the relative angle between the side plate 10 lying parallel on the floor surface 8 and the machine frame 4.
  • two measuring devices arranged at a distance from one another in the longitudinal direction of the road milling machine e.g., measuring devices coupled to the piston-cylinder units 30, 32, detect the longitudinal inclination of the machine frame 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Claims (14)

  1. Engin de travaux routiers automoteur (1), en particulier fraiseuse à froid ou recycleur, doté
    - d'un train de roulement, lequel porte le châssis de machine (4) par le biais de colonnes élévatrices (12, 13),
    - d'un rouleau de fraisage (6) monté sur le châssis de machine (4) destiné à traiter une surface de sol ou de circulation (8),
    - de deux plaques latérales (10) réglables en hauteur sur les côtés frontaux du rouleau de fraisage (6), lesquelles appuient sur la surface de sol ou de circulation (8) à traiter,
    - d'un dispositif racleur (14) réglable en hauteur, lequel est disposé derrière le rouleau de fraisage (6) dans la direction de déplacement et peut être abaissé dans la piste de fraisage (17) produite par le rouleau de fraisage (6), et
    - d'un dispositif de commande (23) destiné à réguler la profondeur de fraisage du rouleau de fraisage (6), dans lequel le dispositif de commande (23) détermine la profondeur de fraisage du rouleau de fraisage (6) à partir de valeurs de mesure d'au moins un dispositif de mesure (16),
    caractérisé en ce que
    le dispositif de commande (23) règle automatiquement l'état de levage d'au moins une colonne élévatrice (12, 13) arrière et/ou avant dans la direction de déplacement afin de réaliser le parallélisme du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) traitée ou non traitée ou par rapport à un plan de fraisage prédéfini, dans lequel la réalisation du parallélisme du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) traitée ou non traitée peut s'effectuer par le dispositif de commande (23) indépendamment du réglage de la profondeur de fraisage.
  2. Engin de travaux routiers selon la revendication 1, caractérisé en ce que le dispositif de commande (23) détermine l'inclinaison longitudinale du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) traitée ou non traitée ou par rapport au plan de fraisage prédéfini afin de réaliser le parallélisme du châssis de machine (4) par rapport à la surface de sol ou de circulation (8).
  3. Engin de travaux routiers selon la revendication 2, caractérisé en ce que l'inclinaison longitudinale peut être déterminée à partir d'au moins deux valeurs de distance, décalées l'une par rapport à l'autre dans la direction de déplacement, entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée ou non traitée ou le plan de fraisage prédéfini.
  4. Engin de travaux routiers selon la revendication 2, caractérisé en ce que l'inclinaison longitudinale peut être déterminée à partir d'au moins une première valeur de distance entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée et au moins une deuxième valeur de distance, décalée par rapport à la première dans la direction de déplacement, entre le châssis de machine (4) et la surface de sol ou de circulation (8) non traitée en lien avec une valeur de mesure pour la profondeur de fraisage.
  5. Engin de travaux routiers selon la revendication 3 ou 4, caractérisé en ce que la première ou la deuxième valeur de distance entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée ou non traitée peut être déterminée à partir de la position d'une des chenilles roulant sur la surface de sol ou de circulation (8) traitée ou non traitée par rapport au châssis de machine (4).
  6. Engin de travaux routiers selon la revendication 2 ou 3, caractérisé en ce que l'inclinaison longitudinale peut être déterminée à partir d'une première valeur de distance entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée et d'une deuxième valeur de distance entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée, dans lequel la deuxième valeur de distance peut être déterminée à partir de la position du dispositif racleur ou à partir de la position d'au moins une des chenilles roulant sur la surface de sol ou de circulation (8) traitée par rapport au châssis de machine (4).
  7. Engin de travaux routiers selon l'une des revendications 2 ou 3, caractérisé en ce qu'une bande convoyeuse (11) peut être fixée au châssis de machine (4), dans lequel un sabot de protection de bande (122) accueille l'extrémité côté rouleau, prévue pour l'enlèvement de la matière enlevée par fraisage, de la bande convoyeuse (11) et en ce que l'inclinaison longitudinale peut être déterminée au moins à partir d'une première valeur de distance entre le châssis de machine (4) et la surface de sol (8) non traitée et d'une deuxième valeur de distance entre le châssis de machine (4) et la surface de sol (8) non traitée, dans lequel la deuxième valeur de distance peut être déterminée à partir de la position du sabot de protection de bande (122) ou à partir de la position d'au moins une des chenilles (2) roulant sur la surface de sol (8) non traitée ou à partir de la position d'au moins une des plaques latérales (10).
  8. Engin de travaux routiers selon l'une des revendications 3 à 7, caractérisé en ce que les valeurs de distance entre le châssis de machine (4) et la surface de sol ou de circulation (8) traitée ou non traitée peuvent être déterminées à l'aide de systèmes de mesure de déplacement, dans lequel les systèmes de mesure de déplacement sont de préférence intégrables dans les colonnes élévatrices (12, 13) ou dans les cylindres hydrauliques des colonnes élévatrices (12, 13) ou consistent en des dispositifs hydrauliques constitués d'unités piston-cylindre (26, 28) dotées d'un système de mesure de déplacement, destiné à lever ou abaisser les plaques latérales (10) et/ou le dispositif racleur (14) et/ou le sabot de protection de bande.
  9. Engin de travaux routiers selon la revendication 2, caractérisé en ce que l'inclinaison longitudinale du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) non traitée peut être déterminée à partir de l'angle relatif dans la direction de déplacement entre une plaque latérale appuyant sur la surface de sol ou de circulation (8) et le châssis de machine (4), ou en ce que l'inclinaison longitudinale du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) traitée ou non traitée peut être déterminée à partir de l'angle relatif entre au moins une colonne élévatrice (12, 13) orthogonale au châssis de machine (4) et le train de roulement (2) parallèle à la surface de sol ou de circulation (8).
  10. Engin de travaux routiers selon l'une des revendications 1 à 9, caractérisé en ce que la réalisation automatique du parallélisme du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) traitée ou non traitée ou par rapport au plan de fraisage prédéfini n'est effectuée par le dispositif de commande (23) que lorsque le dispositif de commande (23) effectue un réajustement de la profondeur de fraisage ou un réglage d'une profondeur de fraisage prédéfinie.
  11. Engin de travaux routiers selon la revendication 10, caractérisé en ce que le dispositif de commande (23) décide si l'état de levage des colonnes élévatrices (12, 13) avant et/ou arrière doit être réglé afin de s'adapter à la profondeur de fraisage.
  12. Engin de travaux routiers selon l'une des revendications 1 à 9, caractérisé en ce que la réalisation automatique du parallélisme du châssis de machine (4) par rapport à la surface de sol (8) traitée ou non traitée ou par rapport au plan de fraisage prédéfini est effectuée par le dispositif de commande (23) est effectué indépendamment du réglage de la profondeur de fraisage.
  13. Engin de travaux routiers selon l'une des revendications 1 à 12, caractérisé en ce que les plaques latérales (10) appuyant sur la surface de sol ou de circulation (8) de manière pivotante par rapport au châssis de machine (4) comportent deux dispositifs de mesure (16a, 16b) disposés à distance l'un de l'autre dans la direction de déplacement et en ce que la commande (23) mesure l'inclinaison longitudinale du châssis de machine (4) par rapport à la surface de sol ou de circulation (8) à partir de la différence entre les signaux de mesure des plaques latérales (10).
  14. Engin de travaux routiers selon l'une des revendications 1 à 13, caractérisé en ce qu'afin de réaliser le parallélisme du châssis de machine (4) par rapport à la surface de sol (8) ou à la surface de circulation (8) ou par rapport au plan de fraisage prédéfini, l'état de levage des colonnes élévatrices (13) arrière et/ou avant dans la direction de déplacement est modifiable de telle sorte que le châssis de machine (4) est pivotant autour de l'axe du rouleau de fraisage.
EP13154680.6A 2006-12-22 2007-12-21 Machine à fraiser la chaussée avec commande pour la réalisation du parallélisme du cadre de la machine par rapport au sol Active EP2650443B1 (fr)

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DE202006019509 2006-12-22
EP07858125A EP2104768B1 (fr) 2006-12-22 2007-12-21 Fraiseuse routière et procédé permettant d'obtenir le parallélisme du bâti de machine par rapport au sol
PCT/EP2007/064520 WO2008077963A1 (fr) 2006-12-22 2007-12-21 Fraiseuse routière et procédé permettant d'obtenir le parallélisme du bâti de machine par rapport au sol

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EP2650443A2 EP2650443A2 (fr) 2013-10-16
EP2650443A3 EP2650443A3 (fr) 2016-08-03
EP2650443B1 true EP2650443B1 (fr) 2021-06-30

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JP (1) JP5156963B2 (fr)
CN (1) CN101466899B (fr)
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BR (1) BRPI0713752B1 (fr)
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RU2401904C2 (ru) 2010-10-20
US20090108663A1 (en) 2009-04-30
WO2008077963A1 (fr) 2008-07-03
EP2650443A2 (fr) 2013-10-16
CN101466899A (zh) 2009-06-24
RU2008148825A (ru) 2010-06-20
EP2104768B1 (fr) 2013-02-13
AU2007338000B2 (en) 2011-01-06
JP2009545689A (ja) 2009-12-24
JP5156963B2 (ja) 2013-03-06
US8424972B2 (en) 2013-04-23
AU2007338000A1 (en) 2008-07-03
BRPI0713752B1 (pt) 2018-03-13
CN101466899B (zh) 2011-04-06
EP2104768A1 (fr) 2009-09-30
EP2650443A3 (fr) 2016-08-03

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