EP0756656B1 - Maschine zum bearbeiten von fahrbahnen - Google Patents

Maschine zum bearbeiten von fahrbahnen Download PDF

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Publication number
EP0756656B1
EP0756656B1 EP96904046A EP96904046A EP0756656B1 EP 0756656 B1 EP0756656 B1 EP 0756656B1 EP 96904046 A EP96904046 A EP 96904046A EP 96904046 A EP96904046 A EP 96904046A EP 0756656 B1 EP0756656 B1 EP 0756656B1
Authority
EP
European Patent Office
Prior art keywords
machine
machine according
working
working drum
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96904046A
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German (de)
English (en)
French (fr)
Other versions
EP0756656A1 (de
Inventor
Günter HÄHN
Dieter Simons
Peter Busley
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
Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP0756656A1 publication Critical patent/EP0756656A1/de
Application granted granted Critical
Publication of EP0756656B1 publication Critical patent/EP0756656B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving

Definitions

  • the invention relates to a self-propelled work machine for processing roadways, according to the preamble of claim 1.
  • Such construction machines are used for material processing, namely e.g. the stabilization of insufficiently load-bearing soils, the pulverization of hard asphalt surfaces and the recycling of bound or unbound road surfaces.
  • the known construction machines usually have a work roll rotating in a working chamber, which is generally arranged to be adjustable in height and inclination in order to adapt to the surface to be worked.
  • the necessary processes take place, adapted to the respective application, such as detaching and crushing the milled road material, adding binders, mixing and distributing added materials, etc.
  • the working process according to the invention is also subdivided into a counter-rotating working process or a synchronized working process, depending on whether the circumferential roller force counteracts or supports the machine's driving force with the same direction of rotation. Because of their relatively wide range of applications, especially for work in which binders such as lime or cement are mixed in part in bulk with the surface layer to be treated, such machines are often equipped with a closed operator's station for safety reasons.
  • the work machines described at the outset for the renewal of carriageways have a work roll which is driven either on one side or on both sides, with very high drive powers being required depending on the application at a preselectable roll speed. Since the work process is often carried out in the immediate vicinity of lateral obstacles, for example embankments, curbs, trees, house walls, etc., difficulties often arise with regard to maintaining the smallest possible distance between the outer cutting edge of the rotor and the machine outer edge in the working area.
  • the working chamber which extends between the work roll and the hood, is of particular importance for the work result.
  • the enlargement of the working chamber with greater working depth would be advantageous for the work result.
  • the position of the roller axis relative to the chassis axis is quite different in the known machines. Extensive studies have shown that the position of the roller axis relative to the chassis axis is of particular importance for the release behavior. Usually equipped with two chassis axles Working machines require considerable pressure forces for the release behavior of the work roll, which are determined by the machine weight in their maximum height. An advantageous arrangement of the work roll is present when the entire machine weight can be used in the counter-rotating and in the co-rotating work process for the pressing forces of the work roll which may be necessary.
  • the hood is fixed to the machine frame.
  • the fixed arrangement is usually advantageous because of the low construction effort (omission of guide elements).
  • the grain size or the grain size distribution of the detached or partly also taken up material is of great importance for the work result.
  • the geometric design of the working chamber is decisive, which is influenced by defined geometric relationships between the work roll and the hood.
  • a hood that is resistant to mechanical stress offers advantageous work results.
  • the control station which is absolutely necessary for the machines in question for occupational safety reasons, is problematic in that it increases the machine height, which is particularly disadvantageous when the machine is being transported. For this reason, the driving position in the known embodiments has been arranged at the end or at the beginning of a machine, because sufficient space is still found here. On the other hand, this has the disadvantage that only one direction of work can be observed really well.
  • the work process requires an adaptation of the roller axis with regard to the working depth, ie the relative vertical distance of the roller axis from the one to be machined Surface and the absolute cross slope of the roller axis.
  • the tools arranged on the circumference of the roller for the material detachment process are partly equipped with cutting tools which are known from road milling machines.
  • the working depth is displayed on the previously known machines with the help of the relative position between the rotor axis and the chassis axis. This means that the large-volume tires frequently used in this type of work machine, because of their spring action, inevitably lead to a measurement and display error for the working depth.
  • the use of control devices for setting and maintaining a preselected working depth has not yet been implemented.
  • the object of the invention is to create a machine for renewing lanes of the type mentioned at the outset which enables optimum use of the machine weight both in synchronous operation and in counter-rotating operation.
  • the invention advantageously provides that a drive unit containing the drive motor is mounted in a pivot frame and forms a pivotable unit relative to the machine frame, that the work roll is also mounted in the pivotable unit, and together with the unit relative to that on the Machine frame fixed hood is pivotable, and that the work roll is loaded by the weight of the unit directly, with almost the entire weight of the machine between the chassis axes and is transferred to the pivotable unit.
  • the arrangement of the drive unit on the pivotable unit increases the immediate weight load on the work roll and the mass inertia of the unit.
  • the otherwise relatively evenly distributed weight between the bogie axles thus concentrates on the pivotable structural unit arranged centrally between the bogie axles, so that there is a low-lying center of gravity which is equally advantageous for the counter-rotating or synchronous working process.
  • the adjustability of the work roll in connection with the swiveling unit enables the size of the work area, e.g. with increasing working depth. Depending on the working depth that is set, different amounts of material have to be mixed in the work area. The greater the preselected working depth, the higher the amount of material to be processed.
  • the working space used as a mixing room is therefore variable, in order to achieve the required throughput on the one hand and to achieve the required high mixing quality with high performance on the other.
  • the drive unit mounted in the swivel frame has an internal combustion engine for generating the drive power for the work roll and the running gear.
  • the internal combustion engine generates the total drive power necessary for the operation of the machine, in particular the drive power for the work roll but also the drive power for the trolleys.
  • the drive unit can drive several hydraulic pumps, with the hydraulic pressure of which hydraulic motors in the wheels of the undercarriages can be driven separately.
  • the vertical reaction force of the cutting forces on the work roll acts in the synchronous working process with a lever arm on the pivotable assembly, which is the same size or smaller than the lever arm with which the weight force acts on the pivotable assembly, whereby the work roll with the highest possible Contact pressure can be operated.
  • the vertical plane of the resulting weight force essentially coincides with the vertical plane of the resulting reaction force on the cutting forces of the cutting tools of the work roll which are engaged in the synchronous working process.
  • the roller axis runs in a vertical plane that runs at a horizontal distance from the common vertical plane of the resulting weight and the resulting cutting forces.
  • the zero side described at the outset is realized according to the invention.
  • the work roll on one side of the machine extends flush to the lane so that work can be carried out along a predetermined line.
  • the machine overhang on this side is so small that it is also possible to work close to walls.
  • the low-loss transmission of the drive energy of the internal combustion engine is achieved according to the invention by minimizing the number of drive components and by arranging the components with direct power flow that are adapted to the spatial restrictions of the structural unit.
  • the adjustability of the work roll speed is achieved, for example, by fixed gear ratios of a mechanical transmission, by different adjustable gear ratios of a belt drive, or by a combination thereof.
  • the workspace enlargement with increasing working depth is achieved by integrating the structural unit into the machine frame with the hood fixed to the machine frame.
  • this also makes it possible to position the roller axis between the undercarriage axes in such a way that the machine frame weight and the weight of the structural unit can be optimally used for the necessary pressing forces.
  • the fixed connection of the hood to the machine frame enables reaction forces from the comminution process to be introduced directly into the machine frame, for example by a fixed arrangement on the hood of a breaker bar which can be pivoted about a pivot axis parallel to the roller axis.
  • a particularly advantageous embodiment is the implementation or functional integration of the breaker bar with the material control flaps of the hood that are usually present in such hoods.
  • the control station is arranged directly above the structural unit containing the work roll, that is to say largely in the middle of the machine. This gives the vehicle operator's machine overview for the counter-rotating and the synchronous working process. Due to the principle according to the invention of integrating the structural unit containing the work roll into the machine frame, the necessary installation space (machine height) can be kept as small as possible, that, despite the centrally located operator's platform, a minimum transport height is made possible without dismantling the components. In the event that the implement is equipped with a closed driver's cab, this is achieved according to the invention in that the upper part of the closed driver's cab is pivotally arranged for transport purposes. Furthermore, such an arrangement of the operator's station according to the invention includes the possibility of an arrangement which can be moved transversely to the machine frame in order to further improve the clarity, for example on the so-called zero side.
  • the cross-slope adjustments of the work roll necessary for the work process with the components for the height adjustment of the machine frame are possible, for example, by means of column guides or parallelogram guides.
  • the display of the working depth is carried out for both machine sides according to the invention by measuring the working depth relative between the machine frame and the surface to be machined.
  • This can be done by contactless measuring systems, such as an ultrasound sensor arranged laterally next to the roller axis or by several ultrasound sensors arranged laterally on the machine frame as distance sensors.
  • contactless measuring systems such as an ultrasound sensor arranged laterally next to the roller axis or by several ultrasound sensors arranged laterally on the machine frame as distance sensors.
  • ultrasonic sensors other non-contact or contact measuring systems can also be used.
  • a particularly advantageous embodiment of such systems is when the measurement signal of these systems is used not only for display but also for regulating the working depth by means of feedback of the signal.
  • the work roll of the machine according to the invention is equipped with cutting tools.
  • the cutting tool is connected to the work roll according to the invention with the aid of tool holders.
  • the connection of the tool holder to the work roll is preferably carried out as a detachable connection.
  • a particularly advantageous, easily replaceable design is a tool holder which is positively and additionally fastened to the work roll body by means of clamping screws.
  • Fig. 1 shows the machine for processing roadways with a machine frame carried by two trolleys 1 and an operator's station consisting of a driver's cab 23.
  • the driver's cabin 23 can be displaced transversely to the direction of travel on the machine frame.
  • the lateral hydraulic displacement of the operator's platform meets the requirements for an overview when driving forward, be it in work or when transferring at high speed.
  • the driving position can also be rotated by 180 ° for reverse travel, and the steering chassis axis 4 can also be switched.
  • the driver's cab consists of a lower part 22 and an upper part 24 which can be pivoted through 180 ° for transport purposes and thereby reduces the overall height of the machine for transport purposes.
  • the bogies have at the front and rear ends of the machine frame 1 two jointly or optionally individually steerable bogie axles 4, in which each wheel is provided with its own hydraulic drive in the form of a hydraulic motor and can optionally be controlled separately.
  • Each wheel is provided with a height adjustment device 25, so that the height of the machine frame and possibly its inclination can be adjusted exactly to the working or transport height.
  • the entire machine weight is therefore concentrated on the area between the chassis axles 4, a hood 7 being fixed in place below the driver's cab to the center of the machine and delimiting a working area 28 of a rotating work roll 8 serving as a mixing area.
  • a structural unit 2 is pivotally articulated on the machine frame 1 about a pivot axis 3 parallel to the work roll 8, which is arranged at the end of the machine frame 1 opposite the driver's cab 23 at approximately the height of the chassis axis 4 is.
  • the structural unit 2 With the aid of piston-cylinder units 60 arranged on both sides of the machine frame 1, the structural unit 2 can be lowered to the desired working depth 29, which at the same time increases the working space 28 under the hood 7.
  • the piston-cylinder units 60 act on the one hand approximately at the middle of the length of the machine frame 1 and on the other hand on the end of the structural unit 2 facing the work roll 8 in the upper region. Both force application points of each piston-cylinder unit 60 are located approximately in the vertical center of gravity plane 41 of the entire machine running transversely to the direction of travel.
  • the assembly 2 has a swivel frame 13 in which an internal combustion engine 9 with a cooling unit 52, hydraulic pumps (not shown in detail) for the hydraulic drives of the wheels, a belt drive 10 for the direct mechanical drive of the work roll 8 via a reduction gear 11, and the work roll 8 are stored themselves.
  • a substantial part of the machine weight is thus integrated in the structural unit 2, which can thus transmit a high weight directly to the work roll 8. Furthermore, the remaining weight is transmitted from the machine frame 1 to the assembly 2, so that almost the entire machine weight can be used advantageously for the synchronous or counter-rotating work process.
  • roller drive in unit 2 ensures the highest possible efficiency.
  • the engine power of the internal combustion engine 9 is transmitted via a clutch, not shown, and the belt drive 10 directly to the reduction gear 11 in the work roll 8.
  • the advantage of this drive unit integrated in unit 2 is that no hydraulic conversion with the associated disadvantageous loss of power has to take place and that no cumbersome power redirection has to take place. Rather, the belt drive 10 permits the direct drive of the reduction gear 11. Hydraulic pumps for driving the wheels are driven on the internal combustion engine 9 via a pump distributor gear (not shown).
  • the fixed arrangement of the hood 7 on the machine frame 1 provides hydraulically adjustable flaps 18, 19 at the free end of the hood housing, which flaps can be pivoted about pivot axes 20 running parallel to the roller axis 5.
  • An adjustable crusher bar is used to cut loose clods, which is particularly relevant for cold recycling.
  • the flaps 18, 19 of the hood 7 are used as an adjustable breaker bar to avoid too large grain sizes or as a material control flap and are actuated via hydraulic piston-cylinder units 64, 66.
  • the swivel joint 21 for the hydraulic piston-cylinder unit 64 is arranged in a lowered region of the machine frame 1 below the driver's cabin 23.
  • the hydraulic piston-cylinder unit 66 for the material control flap 18 is articulated on the structural unit 2.
  • the hood 7, as can best be seen from FIG. 3, has an application device 32 for a binding agent, so that the road material that has been processed is considered to be with recycling material 62 provided with a binder (cement, lime, emulsion, bitumen) can be reinstalled into the roadway behind the work roll 8 in the direction of travel.
  • a binder cement, lime, emulsion, bitumen
  • the work roll 8 extends transversely to the direction of travel over the entire width of the machine and is provided on its circumference with interchangeable holders 16 which receive cutting tools 17 and are fastened by means of a clamping screw 15.
  • interchangeable change holders 16 enable quick replacement in the event of a repair and thereby shorten downtimes.
  • the cutting cylinder of the cutting tools 17 is provided with the reference number 6.
  • the direction of rotation 48 of the work roll 8 is the same in counter-rotating operation as in synchronous operation.
  • Fig. 4 shows a longitudinal section through the work roll 8, the cutting circle cylinder 6 being indicated by dash-dotted lines.
  • the work roll 8 is provided with a reduction gear 11 arranged in the interior of the work roll, which has an axis offset 30 in order to increase the possible working depth 29 of the work roll 8, as a result of which the belt drive 10 on the work roll side has an axis of rotation which is offset vertically to the roll axis 5 upwards.
  • the axial offset 30 of the roller drive enables an increase in the working depth 29 with the same roller diameter or a reduction in size of the work roller with the same working depth 29.
  • the belt drive 10 enables force bands 14 to transmit power directly from the internal combustion engine 9 to the reduction gear 11.
  • the swivel frame 13 engages over the hood 7, the hood having a recess 50 which enables the work roll 8 to be lowered, so that the working space 28 can advantageously be enlarged with increasing working depth.
  • the inner bearing 12 of the work roll on the opposite side of the reduction gear 11 is arranged in such a space-saving manner that on this side of the work roll 8 a so-called zero side is created, which makes it possible to leave the road almost without lateral Machine overhang.
  • the distance between the machine casing and the work roll is thus reduced to the distance identified by reference number 33.
  • FIG. 5 explains the synchronous working process, the vertical cutting forces which essentially arise during the synchronous working process and their distribution of the distribution of cutting forces being drawn within the cutting circle cylinder 6. From these vertical cutting force components 40 in the area 44 of the cylindrical circumferential surface which is in engagement, a resulting vertical force 42, which has a retroactive effect on the machine, can be specified, which runs at a distance a from the roller axis 5 and is directed against the cutting forces 40. This resulting force is compensated for by the weight of the machine, the resulting weight of the assembly 2 and the machine frame 1 should be arranged in the same vertical plane 41 running transversely to the direction of travel, like the vertical reaction force 42 resulting from the cutting forces. The machine is consequently evenly relieved by the reaction force 42, so that the driving behavior of the machine is not adversely affected.
  • the horizontal distance a of the roller axis 5 of the work roll 8 from the common vertical plane 41 is approximately 0.25 to 0.4 times, preferably approximately 0.3 times the diameter of the work roll. This distance enables the optimal use of the machine weight with a minimal distance between the chassis axes.
  • the distance b of the pivot axis 3 of the assembly 2 from the roller axis 5 is at least 11 ⁇ 2 times to twice the diameter of the work roll.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Repair (AREA)
  • Road Paving Machines (AREA)
  • Gyroscopes (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Body Structure For Vehicles (AREA)
  • Vending Machines For Individual Products (AREA)
  • Soil Working Implements (AREA)
  • Turning (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Lifting Devices For Agricultural Implements (AREA)
  • Arrangement Of Transmissions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Transplanting Machines (AREA)
  • Machine Tool Units (AREA)
EP96904046A 1995-02-12 1996-02-09 Maschine zum bearbeiten von fahrbahnen Expired - Lifetime EP0756656B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19504495 1995-02-12
DE19504495A DE19504495A1 (de) 1995-02-12 1995-02-12 Maschine zur Erneuerung von Fahrbahnen
PCT/EP1996/000556 WO1996024725A1 (de) 1995-02-12 1996-02-09 Maschine zum bearbeiten von fahrbahnen

Publications (2)

Publication Number Publication Date
EP0756656A1 EP0756656A1 (de) 1997-02-05
EP0756656B1 true EP0756656B1 (de) 1997-09-17

Family

ID=7753669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96904046A Expired - Lifetime EP0756656B1 (de) 1995-02-12 1996-02-09 Maschine zum bearbeiten von fahrbahnen

Country Status (17)

Country Link
US (1) US5893677A (el)
EP (1) EP0756656B1 (el)
JP (1) JP3585241B2 (el)
KR (1) KR100251809B1 (el)
CN (1) CN1154768C (el)
AT (1) ATE158364T1 (el)
AU (1) AU702624B2 (el)
BR (1) BR9607522A (el)
CA (1) CA2212723C (el)
DE (2) DE19504495A1 (el)
DK (1) DK0756656T3 (el)
ES (1) ES2110327T3 (el)
GR (1) GR3024864T3 (el)
HK (1) HK1002435A1 (el)
MX (1) MX9706114A (el)
WO (1) WO1996024725A1 (el)
ZA (1) ZA961114B (el)

Cited By (1)

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DE10347874A1 (de) * 2003-10-10 2005-05-12 Wirtgen Gmbh Hecklader-Straßenfräßmaschine mit höhenverstellbarer Abdichtungseinrichtung

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MX9706114A (es) 1998-08-30
CA2212723C (en) 2005-08-30
AU702624B2 (en) 1999-02-25
KR19980702140A (ko) 1998-07-15
CN1154768C (zh) 2004-06-23
BR9607522A (pt) 1997-12-30
ATE158364T1 (de) 1997-10-15
DE19504495A1 (de) 1996-08-22
JP3585241B2 (ja) 2004-11-04
WO1996024725A1 (de) 1996-08-15
JPH10513520A (ja) 1998-12-22
KR100251809B1 (ko) 2000-04-15
DK0756656T3 (da) 1997-12-22
DE59600028D1 (de) 1997-10-23
HK1002435A1 (en) 1998-08-21
AU4789996A (en) 1996-08-27
US5893677A (en) 1999-04-13
ES2110327T3 (es) 1998-02-01
CN1180394A (zh) 1998-04-29
ZA961114B (en) 1996-08-20
GR3024864T3 (en) 1998-01-30
EP0756656A1 (de) 1997-02-05
CA2212723A1 (en) 1996-08-15

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