EP2886719A1 - Engin - Google Patents

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Publication number
EP2886719A1
EP2886719A1 EP14193195.6A EP14193195A EP2886719A1 EP 2886719 A1 EP2886719 A1 EP 2886719A1 EP 14193195 A EP14193195 A EP 14193195A EP 2886719 A1 EP2886719 A1 EP 2886719A1
Authority
EP
European Patent Office
Prior art keywords
construction machine
machine according
signal
milling
receiving unit
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.)
Granted
Application number
EP14193195.6A
Other languages
German (de)
English (en)
Other versions
EP2886719B1 (fr
Inventor
Bernd Holl
Kay Heemann
Günter Dr. Hähn
Axel Mahlberg
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.)
Wirtgen GmbH
Original Assignee
Wirtgen GmbH
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
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Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP2886719A1 publication Critical patent/EP2886719A1/fr
Application granted granted Critical
Publication of EP2886719B1 publication Critical patent/EP2886719B1/fr
Anticipated expiration legal-status Critical
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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups

Definitions

  • the invention relates to a construction machine, in particular for working floors or for removing traffic areas with a milling drum, which is equipped with a plurality of chisels.
  • Such construction machines are known, for example, as road milling machines. They have a milling drum, which is equipped with a variety of chisels, in particular round shank chisels. During use of the machine, the milling drum rotates and the bits come into engagement with the floor covering to be processed. The chisels are subject to constant wear and must be replaced after a certain period of operation. However, the service life of the chisel is heavily dependent on the milling conditions. It often happens that the The operator either exchanges the chisels too early or too late. If they are changed too early, unnecessary tooling costs arise. If you change too late, damage to the milling drum can occur.
  • Another problem with the milling process is the early chisel failure. Owing to external influences or due to tool defects, one or more chisels may break. At the point where the chisel was positioned, then no more material removal takes place. In addition, this also increases the load on neighboring tools. These then experience an increased stress.
  • the object of the invention is achieved in that a detection device optically detects the milling image generated by the milling drum at least partially.
  • the optical detection device such as a camera
  • the quality of the milling image can be controlled. Errors due to wear of the chisels or chisel breakage are visible on the milling pattern.
  • the detection device has at least one odometer which determines the cutting depth.
  • a signal recording unit may be assigned to a machine component or other machine component that is directly or indirectly involved in the work process the signal receiving unit detects an operating state of the machine component, and that the signal receiving unit is connected via a signal processing arrangement to a signal output device.
  • the signal recording unit By means of the signal recording unit one (or possibly also several) machine parts can be monitored.
  • the operating state assumed by the machine part is used as the parameter or characteristic field.
  • the determined characteristic value can be compared with a reference quantity or a reference value field. Once there is an impermissible deviation, an operator can take the necessary corrective action. For example, he can then make the tool change.
  • the reference variable or the reference variable field can be a constant stored in the evaluation unit or a constant selected from many from a database of the evaluation unit based on boundary conditions.
  • the reference quantity / the reference value field can also be time-variable.
  • the datum / datum field may be empirically determined in the machine state with unworn tools.
  • the reference variable / the reference variable field is recursively defined, that is, can be derived from the parameter / the characteristic diagram of the operating state of the past.
  • the operating state of the monitored machine component can be detected either continuously or at predetermined measuring intervals.
  • the measurement result evaluation preferably takes place in such a way that the signal picked up by the signal recording unit is fed to an evaluation circuit, that the evaluation circuit compares the recorded signal with a default value and forms a difference signal from the recorded signal and the default value. In this way, the largely automated error message can then be carried out.
  • the default value can be determined empirically by means of a detection circuit, and that the default value can be read into the evaluation circuit by means of the detection circuit. For example, a machine operator can determine the default value in the milling process in the condition with unworn bits.
  • a conceivable variant of the invention is such that it has a machine chassis, which is carried by a chassis, wherein the chassis one or more drive motors are assigned, and that the signal recording unit detects the power consumption of the drive motor.
  • the chassis one or more drive motors are assigned, and that the signal recording unit detects the power consumption of the drive motor.
  • the signal recording unit detects the power consumption of the drive motor.
  • the drive motors are designed as electric motors and the signal recording unit detects the supplied current or that the drive motors are designed as hydraulic motors and the signal recording unit detects the hydraulic pressure in the fluid circuit associated with the drive motor.
  • a further variant of the invention may be characterized in that the machine chassis is supported at least in regions by means of at least one adjustment that the machine chassis is at least partially adjustable in height by means of the adjustment, for which the adjustment is associated with a fluid under pressure, and that the signal receiving unit, the pressure in the fluid detected.
  • the forces occurring during the milling process are detected indirectly.
  • the cutting forces are low.
  • the vertical portion of the cutting forces is directed against gravity and thus relieves the load of the adjustment, which would otherwise have to carry the entire weight of the machine.
  • the pressure in the fluid associated with the adjusting device decreases in proportion to the vertical proportion of the cutting forces.
  • this value can also be effected by a force measurement, for example by means of a strain gauge, on at least one of the adjusting devices or another component.
  • the signal recording unit detects the machine feed. This can then be compared with the current performance parameters of the road milling machine, in particular with the drive power required for the milling drum.
  • the signal recording unit detects the vibration of the machine component.
  • a uniform vibration can be determined. In the unworn state, this oscillation has fixed characteristics (amplitude, period). As a result of, for example, tool breakage, the vibration undergoes a sudden change to an irregular vibration compared to the vibration before breakage.
  • the vibration is detected by means of a displacement sensor, a speed sensor or an acceleration sensor.
  • signal receiving unit detects the drive torque at one or more locations of a drive arrangement driving the milling drum or that the signal recording unit determines the engine characteristic data.
  • a preferred embodiment of the invention provides that the signal receiving unit has a pulse generator associated with the milling drum.
  • a pulse generator By means of the pulse generator, a position detection of the milling drum can be performed. If the signal detected by the signal recording unit is then processed with the information of the pulse generator, then it is possible to draw a detailed conclusion about the position of a damaged area, for example a broken chisel.
  • the side view of a road milling machine shows the basic structure and the components of the machine.
  • the basis of the machine is a machine frame 10, which is supported by two front bogies 11 and two rear bogies 12.
  • the trolleys 11 and 12 can be offset by electric motors or hydraulic motors in driving motion. These drives work synchronously. Therefore, it is sufficient to use only one landing gear, e.g. 11, sensors S6 and S7 for detecting the current or the pressure and the speed assign.
  • a milling box 13 is mounted on the machine frame 10.
  • This milling box 13 receives at least one milling drum with chisel holders and chisels.
  • the milling drum is driven by a power plant 16 having a diesel engine, with a sensor S8 detecting transmitted torque and a sensor S10 sensing other operating data such as engine speed, exhaust gas temperature, boost pressure, and the like.
  • a camera K is mounted on the machine frame 10, with which the Frästruck is detected and recorded.
  • the image is transferred to a display device, BS in the cab 14 of the machine and displayed.
  • the driver sitting on the driver seat 15 can ride on the in Area of the dashboard 18 arranged screen device BS view the Frästruck and check its condition and infer conclusions on the quality.
  • a continuous check can take place if the camera K and the video display unit BS are switched on during the entire operating time of the machine.
  • the control can also be modified so that the devices are switched on and a display only takes place on the basis of an initiated query.
  • sensors S2 and S4 are housed, which detect the Fräswalzenposition, the milling pressure or the milling torque.
  • a mounted on the machine frame 10 above the milling box 13 sensor S5 detects the vibrations of the milling box 13 in the direction of travel, transverse to the direction of travel of the machine and perpendicular to the road.
  • the machine frame 10 is adjustable by height adjustment relative to the chassis 11 and 12 to change the depth of engagement of the milling drum in the road.
  • the engagement depth is detected with the sensor S1.
  • the pressure of the height adjustment can be detected via sensors S9.
  • the removed milled material is discharged via a conveyor from the milling box 13, this conveyor has an endless conveyor belt 17 which is hinged at one end to the machine frame 10 and as the sensors S11 and S12 show, adjusted in height and can be pivoted laterally, to ensure a takeover by a parked under it vehicle without having to fear damage to the vehicle and / or the endless conveyor belt 17.
  • the measured values acquired by the sensors S1 to S12 are also transmitted to the driver's cab 14 and displayed in the area of the dashboard 18. It can All sensors are associated with individual display elements that can be activated continuously or on request. However, it is also possible for all sensors to be assigned only one central display device, on which the requested measured value is displayed, the display also containing the predefined permissible range for the measured value.
  • the measured values can be continuously recorded and compared with the given measured value ranges. If the measured value is below or above the specified measuring value range, then a warning signal can be automatically triggered and the error situation displayed on the central display device.
  • FIGS. 3a and 3b show Frästruck B.
  • a material increase P remains in the road surface. This can be detected optically with a camera K.
  • FIGS. 4 and 5 are again in the FIGS. 2 and 3 Milling rollers 30 already shown, this time shown in side view.
  • the FIGS. 4a and 5a illustrate the vibration image taken by a corresponding sensor.
EP14193195.6A 2002-01-30 2002-10-18 Fraiseuse routière Expired - Lifetime EP2886719B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10203732A DE10203732A1 (de) 2002-01-30 2002-01-30 Baumaschine
PCT/EP2002/011675 WO2003064770A1 (fr) 2002-01-30 2002-10-18 Fraiseuse routiere fonctionnant de maniere optimale
EP02781269.2A EP1472413B1 (fr) 2002-01-30 2002-10-18 Machine de construction fonctionnant de manière optimale

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP02781269.2A Division EP1472413B1 (fr) 2002-01-30 2002-10-18 Machine de construction fonctionnant de manière optimale
EP02781269.2A Division-Into EP1472413B1 (fr) 2002-01-30 2002-10-18 Machine de construction fonctionnant de manière optimale

Publications (2)

Publication Number Publication Date
EP2886719A1 true EP2886719A1 (fr) 2015-06-24
EP2886719B1 EP2886719B1 (fr) 2021-02-24

Family

ID=27618246

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02781269.2A Revoked EP1472413B1 (fr) 2002-01-30 2002-10-18 Machine de construction fonctionnant de manière optimale
EP14193195.6A Expired - Lifetime EP2886719B1 (fr) 2002-01-30 2002-10-18 Fraiseuse routière

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP02781269.2A Revoked EP1472413B1 (fr) 2002-01-30 2002-10-18 Machine de construction fonctionnant de manière optimale

Country Status (4)

Country Link
US (2) US7422391B2 (fr)
EP (2) EP1472413B1 (fr)
DE (1) DE10203732A1 (fr)
WO (1) WO2003064770A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336254A1 (fr) * 2016-12-15 2018-06-20 Wirtgen GmbH Engin de construction et procédé de conversion de l'engin de construction pour l'usinage d'un revêtement de sol

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US7422391B2 (en) 2008-09-09
US20050207841A1 (en) 2005-09-22
EP2886719B1 (fr) 2021-02-24
DE10203732A1 (de) 2003-08-21
WO2003064770A1 (fr) 2003-08-07
US7905682B2 (en) 2011-03-15
EP1472413B1 (fr) 2015-01-14
US20090035064A1 (en) 2009-02-05
EP1472413A1 (fr) 2004-11-03

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