EP1247904B1 - Road paver - Google Patents

Road paver Download PDF

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Publication number
EP1247904B1
EP1247904B1 EP02007293A EP02007293A EP1247904B1 EP 1247904 B1 EP1247904 B1 EP 1247904B1 EP 02007293 A EP02007293 A EP 02007293A EP 02007293 A EP02007293 A EP 02007293A EP 1247904 B1 EP1247904 B1 EP 1247904B1
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EP
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Prior art keywords
wheels
fore
pair
travel
paver
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EP02007293A
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German (de)
French (fr)
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EP1247904A3 (en
EP1247904A2 (en
Inventor
Dirk Heims
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ABG Allgemeine Baumaschinen GmbH
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ABG Allgemeine Baumaschinen 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
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ

Definitions

  • the invention relates to a paver according to the preamble of claim 1.
  • the object of the invention is to provide a paver according to the preamble of claim 1, which allows adjustment to different ground conditions.
  • the discharge which is suitably infinitely adjustable, can preferably be carried out to the total relief of the front in the direction of travel front wheel pair, based on the paver construction.
  • the latter also offers the advantage that the front wheels of the front Vorderradcrus burden the ground only with its own weight, which Schuachslast is reduced accordingly due to corresponding center of gravity of the paver, so that, if necessary, a permissible for road transport load (in Germany 12 t) or less can be achieved without parts must be removed and placed in the bucket in order to focus shift.
  • the paver shown in Fig. 1 comprises a mobile basic machine 1 with a rear wheel 2 (which may also be replaced by a short crawler) and two pairs of steerable front wheel pairs 3, 4, namely a front and a rear pair of front wheels 3, 4.
  • Die Basic machine 1 has on the front side a bucket 5 and on the back (not shown) distribution screw, between which a (not shown) conveyor for transporting mix to be incorporated 6 from the bucket 5 through a conveyor shaft, on which are superstructures 7, in the field of Distributor screw is arranged.
  • a screed 8 is articulated for floating installation of the mixed material to be installed via tension arms 9.
  • the screed 8 is located in the installation direction behind the area of the auger and includes a base board 10 and behind this laterally staked or independently extendable Ausfahrbohlenmaschine 11.
  • the base board 10 is usually divided in the middle, the two halves of the base board 10 for setting a roof profile transverse to Mounting direction against each other are tilted.
  • the extension screed parts 11 the base screed 10 can be widened approximately to twice its width. If an additional broadening is to be made, this is done by manually attachable screed parts.
  • Each pull arm 9 is pivoted at its front end to the base machine 1, wherein the pivot point relative to the base machine 1 - as shown - via a cylinder 12 and a guide 13 can be adjusted in height.
  • the screed 8 is also connected via hydraulic, hinged to the base machine 1 (not shown) Bohlenen somehowtlastungszylinder, which are also useful as Bohlenentransportzylinder connected to the base machine 1, which transmit a portion of the screed weight to the base machine 1 according to manual specification, which not only the Traction power is increased by the travel drive, but also the floating behavior of the screed 8 is improved, especially when installing low-load mix by a too deep sinking of the screed 8 is prevented.
  • the basic machine 1 has a drive motor 14, generally a diesel engine. This drives a hydraulic pump 15 and a generator 16 for generating electricity.
  • the hydraulic pump 15 supplies the pressure oil for subsequent units.
  • the two wheels of the rear wheel gear 2 are individually hung in the illustrated embodiment and each driven by a hydraulic drive 17 which is supplied via a manifold 18 with pressure oil from the hydraulic pump 15.
  • the wheels of the two pairs of front wheels 3, 4 are also suspended individually by providing for each wheel a vertically arranged hydraulic cylinder 19 in which a king pin 20 is vertically displaceable and further horizontally guided via a lever 21 rotatable, such as in EP 0 283 733 B1.
  • Each kingpin 20 is accordingly formed at its upper end as a piston rod, wherein located in the hydraulic cylinders 19 via the kingpin 20 hydraulic cylinder chambers 22 via compensating lines 23 transversely to the direction of travel of the paver and also via a connecting lines 23 connecting Line 24 are connected together.
  • a directional control valve 25 is arranged to the front front wheel pair 3 from the rear Vorderradbin 4 hydraulically to be able to separate, while the two wheels of the two front wheel pairs 3, 4 remain hydraulically coupled to each other via the compensation lines 23.
  • the directional control valve 25 is connected via a pressure regulating valve 26 to a pressure source 27 and a hydraulic oil sump 28.
  • the individually suspended wheels of the front wheel pairs 3, 4 can not be driven, but are preferably via hydraulic motors 29, which are supplied via a manifold 30 by a hydraulic pump 31 with pressurized oil drivable.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
  • Vehicle Body Suspensions (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Road Paving Structures (AREA)
  • Working-Up Tar And Pitch (AREA)

Abstract

Road finishing machine comprises a chassis arranged on a base machine (1) with a front and a rear front wheel pair (3, 4). A bucket (5) holding material (6) is arranged at the front of the base machine and a board (8) adjustable in the transport position is hinged to the rear of the base machine. The two front wheel pairs are arranged below the bucket and the front and rear front wheels on each side have a single-wheel suspension with hydraulic leveling. The front wheel pair arranged at the front in the direction of travel can be hydraulically separated from the rear front wheel pair and released from the ground.

Description

Die Erfindung betrifft einen Straßenfertiger nach dem Oberbegriff des Anspruchs 1.The invention relates to a paver according to the preamble of claim 1.

Straßenfertiger mit Radfahrwerken weisen gegenüber solchen mit Raupenfahrwerken eine geringere Traktion und darüber hinaus bei losem Untergrund eine sich nachteilig auswirkende, geringere Aufstandsfläche auf. Dieses kann bei den im Durchmesser relativ kleinen Vorderrädern, die sich unterhalb des vorderseitigen Kübels zur Aufnahme von einzubauendem Material befinden, zum Einsinken in den Untergrund führen, wodurch sich in diesem seitliche Aufwerfungen ergeben. Bei angetriebenen Vorderrädern, die auf losem Untergrund zum Durchrutschen kommen, tritt dieser Effekt zudem deutlich verstärkt zutage.Road pavers with wheel tracks have compared to those with crawler tracks a lower traction and beyond a loose ground on a disadvantageous impacting, less footprint on. This can lead to sinking into the ground at the relatively small in diameter front wheels, which are located below the front bucket for receiving einzubauendem material, resulting in this lateral Aufwerfungen. For driven front wheels that slip on loose ground, this effect is also significantly increased.

Grundsätzlich führen Aufwerfungen neben den Vorderrädern und durch Einsinken der Räder erzeugte Vertiefungen zu Unebenheiten im Planum, die dem Einbau einer homogenen Schicht aus Einbaumaterial entgegenstehen. Diese erfordern letztlich Nachbesserungen oder führen zu frühzeitigen Schäden in der verlegten Schicht. Aus diesem Grunde empfiehlt es sich, Straßenfertiger mit vier Vorderrädern einzusetzen, um bei gefülltem Kübel eine zu hohe Belastung der einzelnen Vorderräder zu vermeiden.Basically, raises lead next to the front wheels and through Sinking of the wheels produced depressions to unevenness in the planum, which preclude the installation of a homogeneous layer of paving material. These ultimately require rework or lead to premature damage in the laid shift. For this reason, it is recommended to use pavers with four front wheels to avoid too high a load of the individual front wheels when the bucket is full.

Darüber hinaus ist es bekannt, vgl. EP 0 308 404 B1, bei derartigen Straßenfertigern die je Seite vorhandenen beiden Vorderräder in einer Wippe zu lagern. Zusätzlich ist es bekannt, vgl. DE 299 20 556 U1, bei derartigen Straßenfertigem die je Seite vorhandenen beiden Vorderräder in einer Wippe derart zu lagern, daß das vordere Vorderradpaar einen größeren Hebelarm zum Drehpunkt der Wippe aufweist als das hintere. Hiermit erreicht man, daß das vordere Vorderradpaar aufgrund der durch den längeren Hebelarm bedingten geringeren Auflast eine Vorverfestigung des losen Untergrunds bewirkt, auf dem sodann das in Fahrtrichtung dahinter befindliche Vorderradpaar mit einer höheren Radlast ohne bzw. ohne zu starkes Einsinken verfahren werden kann. Aufgrund der konstruktiv bedingten Gegebenheiten ist diese Lösung jedoch nicht variabel.In addition, it is known, cf. EP 0 308 404 B1, in such road pavers to store each side existing two front wheels in a rocker. In addition, it is known, cf. DE 299 20 556 U1, in such road finishes the two front wheels present each page in a rocker to store so that the front pair of front wheels has a larger lever arm to the pivot point of the rocker than the rear. This ensures that the front pair of front wheels causes a pre-consolidation of the loose ground due to the lower load caused by the longer lever arm, on which then the front wheel pair located behind in the direction of travel can be moved with a higher wheel load without or without too much sinking. Due to the constructional conditions, however, this solution is not variable.

Gemäß DE 195 13 195 A1 ist es bekannt, bei einem Straßenfertiger die Einbaubohle im Transportzustand weiter vorn als im Betrieb anzuordnen, um den Schwerpunkt des Straßenfertigers etwas nach vorne zu verlagern. Dies führt jedoch zu weitgehenden Umkonstruktionen im hinteren Fertigerbereich, um den nötigen Freiraum für die im Transportfall weit vorn angeordnete Einbaubohle zu gewährleisten.According to DE 195 13 195 A1, it is known to arrange the screed in the transport state further forward than in operation at a paver to move the center of gravity of the paver slightly forward. However, this leads to extensive redesigns in the rear paver area, in order to ensure the necessary space for the far ahead arranged screed in the transport case.

Eine ähnliche Konstruktion, bei der ebenfalls die Einbaubohle für den Transportfall nach vorne verlagerbar ist, ist in DE 200 09 280 U1 beschrieben.A similar construction, in which also the screed for transport to the front is displaceable, is described in DE 200 09 280 U1.

Ferner ist es aus EP 0 283 733 B1 bekannt, bei einem Straßenfertiger mit einem Vorderradpaar hierfür eine Einzelradaufhängung mit hydraulischem Niveauausgleich vorzusehen. Hierdurch erfolgt ein Niveauausgleich der Lenkräder, der den beim Beschickungsvorgang, d.h. beim Transport von Einbaumaterial aus dem Kübel zur Verteilerschnecke vor der Einbaubohle, auftretenden Kräften gerecht wird und zugleich die für eine Lenkeinrichtung notwendigen Schwenkbewegungen übernimmt.Furthermore, it is known from EP 0 283 733 B1 to provide a single-wheel suspension with hydraulic level compensation for a paver with a front wheel pair for this purpose. As a result, a leveling of the steering wheels, which takes place during the loading process, ie during the transport of paving material the bucket to the auger in front of the screed, forces occurring and at the same time takes the necessary pivoting movements for a steering device.

Eine ähnliche Einzelradaufhängung der antreibbaren Vorderräder eines Straßenfertigers ist aus DE 41 38 076 C2 bekannt.A similar independent suspension of the drivable front wheels of a paver is known from DE 41 38 076 C2.

Aufgabe der Erfindung ist es, einen Straßenfertiger nach dem Oberbegriff des Anspruchs 1 zu schaffen, der eine Einstellung auf unterschiedliche Bodenverhältnisse ermöglicht.The object of the invention is to provide a paver according to the preamble of claim 1, which allows adjustment to different ground conditions.

Diese Aufgabe wird entsprechend dem kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved according to the characterizing part of claim 1.

Die Tatsache, daß vorgesehen ist, daß das in Fahrtrichtung vorn angeordnete Vorderradpaar wahlweise gegenüber dem hinteren Vorderradpaar bezüglich eines Niveauausgleichs separiert und ferner wahlweise gegenüber dem Untergrund entlastet werden kann, führt im Zusammenhang mit dieser konstruktiv einfachen und damit kostengünstigen Lösung dazu, daß eine Einstellung auf unterschiedliche Bodenverhältnisse ermöglicht wird. Die Entlastung, die zweckmäßigerweise stufenlos einstellbar ist, kann vorzugsweise bis zur totalen Entlastung des in Fahrtrichtung vorderen Vorderradpaares, bezogen auf den Fertigeraufbau, erfolgen. Letzteres bietet zugleich den Vorteil, daß die Vorderräder des vorderen Vorderradpaars den Untergrund nur noch mit ihrem Eigengewicht belasten, wodurch infolge entsprechender Schwerpunktverlagerung des Straßenfertigers die Hinterachslast entsprechend herabgesetzt wird, so daß erforderlichenfalls eine für den Straßentransport zulässige Belastung (in Deutschland 12 t) oder weniger erreicht werden kann, ohne daß Teile abmontiert und im Kübel zwecks Schwerpunktverlagerung untergebracht werden müssen.The fact that it is provided that the front in the direction of travel arranged front pair optionally separated from the rear pair of front with respect to a level compensation and also optionally can be relieved against the background leads in connection with this structurally simple and therefore cost-effective solution to a setting on different soil conditions is possible. The discharge, which is suitably infinitely adjustable, can preferably be carried out to the total relief of the front in the direction of travel front wheel pair, based on the paver construction. The latter also offers the advantage that the front wheels of the front Vorderradpaars burden the ground only with its own weight, which Hinterachslast is reduced accordingly due to corresponding center of gravity of the paver, so that, if necessary, a permissible for road transport load (in Germany 12 t) or less can be achieved without parts must be removed and placed in the bucket in order to focus shift.

Nimmt man die Separierung der beiden Vorderradpaare ohne eine hydraulische Entlastung vor, so ist es möglich, mit dem Straßenfertiger deutlich größere Auffahrwinkel zu befahren. In Fällen, in denen beispielsweise eine Auffahrrampe zu einem zum Transport des Straßenfertigers bereit stehenden Tieflader einen zu großen Auffahrwinkel aufweist, ist es dann nicht mehr nötig, sich mit untergelegten Hölzern od.dgl. zu behelfen, um den Winkel etappenweise zu verkleinern, um Schäden am Tieflader oder am Straßenfertiger zu vermeiden.Assuming the separation of the two pairs of front wheels without a hydraulic relief, it is possible to drive with the paver significantly larger contact angle. In cases where, for example, a ramp to a ready for transporting the paver stand Low loader has a too large Auffahrwinkel, then it is no longer necessary, or the like with underlaid woods. to reduce the angle step by step to avoid damage to the low loader or paver.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschreibung und den Unteransprüchen zu entnehmen.Further embodiments of the invention are described in the following description and the dependent claims.

Die Erfindung wird nachstehend anhand eines in den beigefügten Abbildungen dargestellten Ausführungsbeispiels näher erläutert.

  • Fig. 1 zeigt teilweise aufgeschnitten perspektivisch einen Straßenfertiger.
  • Fig. 2 zeigt schematisch eine Frontansicht des Straßenfertigers.
  • Fig. 3 zeigt schematisch einen Hydraulikkreis für den Straßenfertiger.
The invention is explained below with reference to an embodiment shown in the accompanying drawings.
  • Fig. 1 shows a partially cutaway perspective a paver.
  • Fig. 2 shows schematically a front view of the paver.
  • Fig. 3 shows schematically a hydraulic circuit for the paver.

Der in Fig. 1 dargestellte Straßenfertiger umfaßt eine fahrbare Grundmaschine 1 mit einem hinteren Radfahrwerk 2 (das auch durch ein kurzes Raupenfahrwerk ersetzt sein kann) und zwei Paaren von lenkbaren Vorderradpaaren 3, 4, nämlich einem vorderen und einem hinteren Vorderradpaar 3, 4. Die Grundmaschine 1 weist vorderseitig einen Kübel 5 und rückseitig eine (nicht dargestellte) Verteilerschnecke auf, zwischen denen ein (nicht dargestellter) Förderer zum Transportieren von einzubauendem Mischgut 6 aus dem Kübel 5 durch einen Förderschacht, über dem sich Aufbauten 7 befinden, in den Bereich der Verteilerschnecke angeordnet ist.The paver shown in Fig. 1 comprises a mobile basic machine 1 with a rear wheel 2 (which may also be replaced by a short crawler) and two pairs of steerable front wheel pairs 3, 4, namely a front and a rear pair of front wheels 3, 4. Die Basic machine 1 has on the front side a bucket 5 and on the back (not shown) distribution screw, between which a (not shown) conveyor for transporting mix to be incorporated 6 from the bucket 5 through a conveyor shaft, on which are superstructures 7, in the field of Distributor screw is arranged.

An der Grundmaschine 1 ist eine Einbaubohle 8 zum schwimmenden Einbau des einzubauenden Mischgutes über Zugarme 9 angelenkt. Die Einbaubohle 8 befindet sich in Einbaurichtung hinter dem Bereich der Verteilerschnecke und umfaßt eine Grundbohle 10 sowie hinter dieser seitlich angestückelte oder unabhängig voneinander ausfahrbare Ausfahrbohlenteile 11. Die Grundbohle 10 ist üblicherweise mittig geteilt, wobei die beiden Hälften der Grundbohle 10 zur Einstellung eines Dachprofils quer zur Einbaurichtung gegeneinander neigbar sind. Mittels der Ausfahrbohlenteile 11 ist die Grundbohle 10 etwa auf ihre doppelte Breite verbreiterbar. Soll noch eine zusätzliche Verbreiterung vorgenommen werden, wird dies durch manuell anstückelbare Bohlenteile vorgenommen.On the basic machine 1, a screed 8 is articulated for floating installation of the mixed material to be installed via tension arms 9. The screed 8 is located in the installation direction behind the area of the auger and includes a base board 10 and behind this laterally staked or independently extendable Ausfahrbohlenteile 11. The base board 10 is usually divided in the middle, the two halves of the base board 10 for setting a roof profile transverse to Mounting direction against each other are tilted. By means of the extension screed parts 11, the base screed 10 can be widened approximately to twice its width. If an additional broadening is to be made, this is done by manually attachable screed parts.

Jeder Zugarm 9 ist an seinem vorderen Ende an der Grundmaschine 1 schwenkbar angelenkt, wobei der Anlenkpunkt gegenüber der Grundmaschine 1 - wie dargestellt - über einen Zylinder 12 und eine Führung 13 höhenverstellbar sein kann.Each pull arm 9 is pivoted at its front end to the base machine 1, wherein the pivot point relative to the base machine 1 - as shown - via a cylinder 12 and a guide 13 can be adjusted in height.

Die Einbaubohle 8 ist ferner über hydraulische, an der Grundmaschine 1 angelenkte (nicht dargestellte) Bohlenteilentlastungszylinder, die auch als Bohlentransportzylinder nutzbar sind, mit der Grundmaschine 1 verbunden, die gemäß manueller Vorgabe einen Teil des Bohlengewichts auf die Grundmaschine 1 übertragen, wodurch nicht nur die Traktionskraft von deren Fahrantrieb vergrößert wird, sondern auch das Schwimmverhalten der Einbaubohle 8 vor allem beim Einbau von wenig tragfähigem Mischgut verbessert wird, indem ein zu starkes Einsinken der Einbaubohle 8 verhindert wird.The screed 8 is also connected via hydraulic, hinged to the base machine 1 (not shown) Bohlenenteilentlastungszylinder, which are also useful as Bohlenentransportzylinder connected to the base machine 1, which transmit a portion of the screed weight to the base machine 1 according to manual specification, which not only the Traction power is increased by the travel drive, but also the floating behavior of the screed 8 is improved, especially when installing low-load mix by a too deep sinking of the screed 8 is prevented.

Die Grundmaschine 1 weist einen Antriebsmotor 14, im allgemeinen einen Dieselmotor, auf. Dieser treibt eine Hydraulikpumpe 15 und einen Generator 16 zur Stromerzeugung. Die Hydraulikpumpe 15 liefert das Drucköl für nachfolgende Aggregate.The basic machine 1 has a drive motor 14, generally a diesel engine. This drives a hydraulic pump 15 and a generator 16 for generating electricity. The hydraulic pump 15 supplies the pressure oil for subsequent units.

Die beiden Räder des hinteren Radfahrwerks 2 sind im dargestellten Ausführungsbeispiel einzeln aufgehängt und jeweils über einen Hydraulikantrieb 17 antreibbar, der über einen Verteiler 18 mit Drucköl von der Hydraulikpumpe 15 versorgt wird.The two wheels of the rear wheel gear 2 are individually hung in the illustrated embodiment and each driven by a hydraulic drive 17 which is supplied via a manifold 18 with pressure oil from the hydraulic pump 15.

Die Räder der beiden Paare von Vorderrädern 3, 4 sind ebenfalls einzeln aufgehängt, indem für jedes Rad ein vertikal angeordneter Hydraulikzylinder 19 vorgesehen ist, in dem ein Achsschenkelbolzen 20 vertikal verschiebbar und ferner horizontal über einen Hebel 21 verdrehbar geführt ist, wie beispielsweise in EP 0 283 733 B1 beschrieben ist. Jeder Achsschenkelbolzen 20 ist dementsprechend an seinem oberen Ende als Kolbenstange ausgebildet, wobei sich in den Hydraulikzylindern 19 über den Achsschenkelbolzen 20 befindliche Hydraulikzylinderräume 22 über Ausgleichsleitungen 23 quer zur Fahrtrichtung des Straßenfertigers und ferner über eine die Ausgleichsleitungen 23 verbindenden Leitung 24 miteinander verbunden sind. Hierdurch können entsprechende Unterschiede im Höhenniveau der Vorderräder ausgeglichen werden, wie in Fig. 2 dargestellt ist.The wheels of the two pairs of front wheels 3, 4 are also suspended individually by providing for each wheel a vertically arranged hydraulic cylinder 19 in which a king pin 20 is vertically displaceable and further horizontally guided via a lever 21 rotatable, such as in EP 0 283 733 B1. Each kingpin 20 is accordingly formed at its upper end as a piston rod, wherein located in the hydraulic cylinders 19 via the kingpin 20 hydraulic cylinder chambers 22 via compensating lines 23 transversely to the direction of travel of the paver and also via a connecting lines 23 connecting Line 24 are connected together. As a result, corresponding differences in the height level of the front wheels can be compensated, as shown in Fig. 2.

Wie in Fig. 3, in der sich die beiden Einzelradaufhängungen des vorderen Vorderradpaars 3 links und die beiden Einzelradaufhängungen des hinteren Vorderradpaars 4 rechts befinden, dargestellt, ist in der Leitung 24 ein Wegeventil 25 angeordnet, um das vordere Vorderradpaar 3 vom hinteren Vorderradpaar 4 hydraulisch separieren zu können, während die beiden Räder der beiden Vorderradpaare 3, 4 über die Ausgleichsleitungen 23 hydraulisch miteinander gekoppelt bleiben. Das Wegeventil 25 ist über ein Druckregelventil 26 mit einer Druckquelle 27 und einem Hydraulikölsumpf 28 verbunden.As shown in Fig. 3, in which the two independent suspensions of the front Vorderradpaars 3 are left and the two independent suspensions of the rear Vorderradpaars 4 right, shown, in the conduit 24, a directional control valve 25 is arranged to the front front wheel pair 3 from the rear Vorderradpaar 4 hydraulically to be able to separate, while the two wheels of the two front wheel pairs 3, 4 remain hydraulically coupled to each other via the compensation lines 23. The directional control valve 25 is connected via a pressure regulating valve 26 to a pressure source 27 and a hydraulic oil sump 28.

In der dargestellten mittleren Stellung des Wegeventils 25, das beispielsweise über eine elektrische Leitung vom Fahrerstand her ansteuerbar ist, sind sämtliche Vorderräder, d.h. die zugehörigen Hydraulikzylinderräume 22, hydraulisch über die Leitung 24 und die Ausgleichsleitungen 23 miteinander verbunden. In der unteren Stellung des Wegeventils 25 sind die vorderen und hinteren Vorderradpaare 3, 4 dagegen hydraulisch voneinander getrennt, während in der oberen Stellung das vordere Vorderradpaar 3 zusätzlich entsprechend der Stellung des vorzugsweise stufenlos verstellbaren Drucktegelventils 26 entlastbar ist.In the illustrated middle position of the directional control valve 25, which is controllable for example via an electrical line from the driver's cab, all front wheels, i. the associated hydraulic cylinder chambers 22, hydraulically connected to each other via the line 24 and the compensation lines 23. In the lower position of the directional control valve 25, the front and rear Vorderradpaare 3, 4, however, hydraulically separated from each other, while in the upper position, the front Vorderradpaar 3 is additionally relieved according to the position of the preferably continuously adjustable Drucktegelventils 26.

Die einzeln aufgehängten Räder der Vorderradpaare 3, 4 können nicht angetrieben sein, sind jedoch vorzugsweise über Hydraulikmotoren 29, die über einen Verteiler 30 von einer Hydraulikpumpe 31 mit Drucköl versorgt werden, antreibbar.The individually suspended wheels of the front wheel pairs 3, 4 can not be driven, but are preferably via hydraulic motors 29, which are supplied via a manifold 30 by a hydraulic pump 31 with pressurized oil drivable.

Claims (5)

  1. Paver having a wheeled travel mechanism (2, 3, 4) which comprises a front pair of fore-wheels and a back pair of fore-wheels and which is arranged on a base machine (1), there being arranged on the base machine (1), at the front end, a hopper (5) for holding paving material (6) and, at the back end, a screed (8) which is in articulated connection with the base machine (1) and which can be fixed in a transport position, the two pairs (3, 4) of fore-wheels being arranged in the region beneath the hopper (5) and the fore-wheels thereof to the front and back in the direction of travel on each side having individual wheel suspensions with hydraulic level equalisation, characterised in that means are provided for hydraulic isolation of the individual wheel suspensions of the pair (3) of fore-wheels arranged to the front in the direction of travel from the individual wheel suspensions of the back pair (4) of fore-wheels and for load relief of the pair (3) of fore-wheels arranged to the front in the direction of travel with respect to the underlying surface.
  2. Paver according to claim 1, characterised in that the load relief of the pair (3) of fore-wheels arranged to the front in the direction of travel is steplessly adjustable.
  3. Paver according to claim 1 or 2, characterised in that the individual wheel suspensions of the front and back fore-wheels are hydraulically connected to one another across the direction of travel by a respective equalisation line (23), the two equalisation lines (23) being connected by a line (24) having a directional control valve (25) by means of which the individual wheel suspensions of the pair (3) of fore-wheels arranged to the front in the direction of travel can be hydraulically isolated from those of the back pair (4) of fore-wheels and can be relieved of load with respect to the underlying surface.
  4. Paver according to claim 3, characterised in that the directional control valve (25) is connected by way of a pressure control valve (26) to a pressurised oil source (27) and to an oil sump (28).
  5. Paver according to one of claims 1 to 4, characterised in that at least the back pair (4) of fore-wheels is arranged to be driven.
EP02007293A 2001-04-07 2002-04-03 Road paver Expired - Lifetime EP1247904B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10117583A DE10117583B4 (en) 2001-04-07 2001-04-07 pavers
DE10117583 2001-04-07

Publications (3)

Publication Number Publication Date
EP1247904A2 EP1247904A2 (en) 2002-10-09
EP1247904A3 EP1247904A3 (en) 2003-09-17
EP1247904B1 true EP1247904B1 (en) 2006-02-01

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EP02007293A Expired - Lifetime EP1247904B1 (en) 2001-04-07 2002-04-03 Road paver

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EP (1) EP1247904B1 (en)
AT (1) ATE317033T1 (en)
DE (2) DE10117583B4 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016007076A1 (en) * 2016-06-10 2017-12-14 Dynapac Gmbh Road construction machine and method for operating a self-propelled road construction machine
WO2018117920A1 (en) * 2016-12-22 2018-06-28 Volvo Construction Equipment Ab Paver provided with selective hydraulic suspension of fore-wheels in paving and non-paving modes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8702877U1 (en) * 1987-02-25 1987-04-09 Abg-Werke Gmbh, 3250 Hameln Paver
DE3777651D1 (en) * 1987-04-10 1992-04-23 Domenico Domenighetti ROAD PAVER WITH A COMBINATION OF AXLES WITH STEERING WHEELS AND TRACK UNITS.
JPH0732573Y2 (en) * 1990-11-19 1995-07-26 新キャタピラー三菱株式会社 Front-wheel drive force controller for four-wheel drive asphalt finisher
DE19513195A1 (en) * 1995-03-31 1996-10-10 Svedala Strasenfertiger Gmbh Vehicle used to prepare road surface
DE29704207U1 (en) * 1997-03-07 1997-04-24 ABG Allgemeine Baumaschinen GmbH, 31785 Hameln Paver
DE29920556U1 (en) * 1999-11-23 2000-02-17 Voegele Ag J Paver
DE20009280U1 (en) * 2000-05-23 2000-08-17 Voegele Ag J Paver

Also Published As

Publication number Publication date
EP1247904A3 (en) 2003-09-17
ATE317033T1 (en) 2006-02-15
DE50205729D1 (en) 2006-04-13
DE10117583B4 (en) 2005-06-02
DE10117583A1 (en) 2002-11-07
EP1247904A2 (en) 2002-10-09

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