EP4012101A1 - Rear tiller for a snow groomer for preparation of a snow surface - Google Patents

Rear tiller for a snow groomer for preparation of a snow surface Download PDF

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Publication number
EP4012101A1
EP4012101A1 EP21209765.3A EP21209765A EP4012101A1 EP 4012101 A1 EP4012101 A1 EP 4012101A1 EP 21209765 A EP21209765 A EP 21209765A EP 4012101 A1 EP4012101 A1 EP 4012101A1
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EP
European Patent Office
Prior art keywords
tiller
shaft
milling
drive
shaft parts
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
EP21209765.3A
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German (de)
French (fr)
Other versions
EP4012101B1 (en
Inventor
Andreas Behmüller
Daniel Hartmann
Claudius Henger
Sven HOLZAPFEL
Martin Mangold
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Kassbohrer Gelandefahrzeug AG
Kaessbohrer Gelaendefahrzeug AG
Original Assignee
Kassbohrer Gelandefahrzeug AG
Kaessbohrer Gelaendefahrzeug AG
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Application filed by Kassbohrer Gelandefahrzeug AG, Kaessbohrer Gelaendefahrzeug AG filed Critical Kassbohrer Gelandefahrzeug AG
Publication of EP4012101A1 publication Critical patent/EP4012101A1/en
Application granted granted Critical
Publication of EP4012101B1 publication Critical patent/EP4012101B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H4/00—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow
    • E01H4/02—Working on surfaces of snow or ice in order to make them suitable for traffic or sporting purposes, e.g. by compacting snow for sporting purposes, e.g. preparation of ski trails; Construction of artificial surfacings for snow or ice sports ; Trails specially adapted for on-the-snow vehicles, e.g. devices adapted for ski-trails

Definitions

  • the invention relates to a rear tiller for a snow groomer for working snow surfaces, with a support structure which is designed for detachable attachment to a rear implement carrier of the snow groomer and which carries a tiller box in which a tiller shaft arrangement is rotatably mounted, which has at least two tiller shaft parts that are driven by a drive system are drivable.
  • Such a tail cutter is from the DE 10 2006 057 272 B4 known.
  • the well-known rear tiller has a support structure on which a multi-part tiller box is held.
  • a milling shaft arrangement is rotatably mounted in the milling box, with each milling box part being assigned a milling shaft part.
  • a finisher arrangement is provided, which compacts and smoothes snow grain sizes that have been chopped up by the tiller shaft arrangement.
  • the object of the invention is to create a rear tiller of the type mentioned at the outset that has a reduced weight compared to the prior art and an improved distribution of installation space.
  • the auger shaft parts are coupled to one another in a rotationally locked manner by means of a coupling device arranged between the adjacent auger shaft parts, and that the drive system has a belt drive acting in the area of the coupling device, which is connected to both auger shaft parts in a torque-transmitting manner.
  • the solution according to the invention avoids drive motors arranged at the ends of the milling box. In this way, at the end, ie at the opposite end faces of the milling box, space is achieved for an arrangement of a side finisher unit in each case.
  • the belt drive acting in the middle between two milling shaft parts ensures that the milling shaft parts are driven without the corresponding drive motors being arranged on the end of the milling box.
  • a corresponding drive motor can be fastened at a distance above the milling shaft arrangement on the milling box or on a section of the support structure.
  • the solution according to the invention also makes it possible to drive at least two milling shaft parts by means of the belt drive and thus by means of a single drive motor. According to the invention, increased running smoothness also results. Due to the reduced number of components for the drive system, the production costs for the rear tiller according to the invention are also reduced.
  • the coupling device is designed as a cardan shaft allowing an angular offset between the axes of rotation of the two milling shaft parts. On the one hand, this ensures reliable torque transmission between the two milling shaft parts. On the other hand, angle compensation is possible between the axes of rotation of the two milling shaft parts, so that the two milling shaft parts do not have to be coaxially aligned with one another, but can also be twisted relative to one another at limited angles.
  • the belt drive has a driven gear which is connected to the auger shaft part coaxially to an axis of rotation of a auger shaft part and is designed as a ring gear, and the articulated shaft passes through the ring gear.
  • the ring gear which serves as the output gear, is passed through by the cardan shaft without contact.
  • a free inner diameter of the ring gear is dimensioned so large that angular alignments of the articulated shaft within the ring gear are also possible without the articulated shaft making contact with an interior of the ring gear.
  • the ring gear is arranged to be axially displaceable relative to the cardan shaft. This configuration enables simple assembly and disassembly of corresponding functional components of the rear tiller, in particular the tiller shaft parts, the belt drive and the cardan shaft.
  • the auger shaft part is provided on a front side facing the adjacent auger shaft part with a drive flange designed as a hollow body, which encloses the cardan shaft on the outside and is non-rotatably connected to the ring gear at an end region spaced apart from the auger shaft part.
  • the hollow body is preferably designed like a bell and on the one hand allows attachment to the ring gear of the belt drive and on the other hand a non-contact enclosing of the cardan shaft.
  • the hollow body is fastened on the face side to the assigned milling shaft part.
  • the connecting flange designed as a hollow body is also designed in such a way that it can at least partially dip axially into an open front end area of the auger shaft part, so that the axial overall length of the auger shaft part is almost not increased despite the attachment of the connecting flange.
  • the two milling shaft parts can be aligned at a limited angle relative to one another.
  • This configuration is advantageous when the rear cutter is in operation, since a straight-line stability of the rear cutter when towing on the snow groomer can be improved by correspondingly V- or W-shaped alignment of the various cutter shaft parts of the rear cutter.
  • the V-shaped or W-shaped alignment is preferably in a plane that is aligned parallel to a snow base to be processed.
  • the angular one Alignment of the tiller shaft parts is advantageously carried out mirror-symmetrically to a central axis extending in the towing direction of the rear tiller or to a vertical central plane receiving the central axis.
  • a drive motor of the drive system is mounted at a distance above the ring gear on the support structure or the milling box, and the drive motor is coupled to a drive wheel of the belt drive.
  • the drive motor is preferably hydraulic or electric.
  • One drive motor is advantageously provided for each two adjacent milling shaft parts. Accordingly, if the auger shaft arrangement has four auger shaft parts, two drive motors and two belt drives are advantageously provided.
  • the milling box is made in several parts, so that for each milling shaft part there is an impact housing part surrounding the milling shaft part at a distance. The baffle housing parts are held to the support structure.
  • the belt drive is designed as a toothed belt drive. This results in low-loss torque transmission from the drive motor to the milling shaft parts.
  • a rear tiller 1 after the Figures 1 to 6 is intended for a tracked vehicle in the form of a snow groomer.
  • the rear tiller 1 is used for processing snow surfaces in winter sports areas.
  • the rear tiller is detachably attached to the rear of the snow groomer.
  • the snow groomer has, in a manner known in principle, a rear implement carrier to which the rear tiller 1 is connected.
  • the rear tiller 1 is provided with a centrally arranged holding device 5 which is firmly connected to a support structure 2 of the rear tiller 1 .
  • the holding device 5 has, as shown in FIG 3 can be seen, a hook 8 on which the rear tiller 1 is attached to the rear implement carrier, not shown, of the snow groomer.
  • the support structure 2 carries a milling box 3 which is provided for receiving a milling shaft arrangement 4 .
  • the milling box 3 is designed in several parts and, in the exemplary embodiment shown, has two milling housing parts, in each of which a milling shaft part of the milling shaft arrangement 4 is rotatably mounted.
  • the rear tiller 1 has a finisher arrangement F behind the tiller shaft arrangement 4 in the towing direction.
  • side finishers S are assigned to the milling box 3 on opposite front sides, which in 1 are not shown.
  • the two milling housing parts of the milling box 3, which enclose the two milling shaft parts 4, are held at a small axial distance from one another transversely to the towing direction of the rear tiller 1.
  • One milling housing part can be angularly aligned to a limited extent relative to the adjacent milling housing part of the milling box 3, such as figure 5 can be removed.
  • the two milling shaft parts 4, which are rotatably mounted in the respective milling housing part, are spaced apart axially from one another, analogously to the impact housing parts, transversely to the towing direction.
  • the milling shaft parts 4 are aligned coaxially to one another with aligned axes of rotation D 1 and D 2 and are coupled to one another in a torque-transmitting manner via a coupling device 7 described in more detail below.
  • the torque-transmitting coupling of the two milling shaft parts 4 relative to one another takes place via an articulated shaft 12, which permits angular alignments of the milling shaft parts 4 relative to one another and nevertheless ensures reliable torque transmission.
  • the in the 1 and 2 and 5, 6 right milling shaft part 4 is driven by a drive system which has a drive motor 6 and a belt drive 9 to 11.
  • the belt drive 9 to 11 is provided with a driven wheel in the form of a ring gear 10 and with a drive wheel 9 which is held in a rotationally fixed manner on a drive shaft of the drive motor 6 (not designated in any more detail).
  • the drive wheel 9 and the ring gear 10 are one circulating toothed belt 11 connected to each other.
  • the ring gear 10 is connected to a front end area 13 of the right-hand milling shaft part 4 via a drive flange 16 designed as a hollow body.
  • the front end area 13 is held rotatably by means of a roller bearing 14 on a bearing flange 15 which is firmly connected to the milling housing part of the milling box 3 .
  • the cardan shaft 12 has two shaft flange sections, not designated in any more detail, which are connected to one another by means of a central joint section.
  • the two shaft flanges are non-rotatably connected to the opposite end regions 13 of the two milling shaft parts 4 .
  • the cardan shaft 12 is mounted inside the drive flange 16, which is designed as a bell-shaped hollow body, and inside the ring gear 10, so that the cardan shaft 12 can drive the ring gear 10 coaxially to the axes of rotation D 1 and D 2 of the Milling shaft parts 4 interspersed.
  • the ring gear 10 which is connected with screw connections to the drive flange 16 designed as a hollow body, can be detached from the drive flange 16 and moved axially towards the adjacent milling shaft part 4 , like this in 6 is recognizable. In this position, access to the articulated shaft 12 and to the attachment to the end regions 13 of the auger shaft parts 14 is enabled, so that the coupling device 7 can be assembled or disassembled without having to remove the auger housing parts or the auger shaft parts 4 .

Abstract

Heckfräse (1) für eine Pistenraupe zur Schneeflächenbearbeitung. Eine derartige Heckfräse mit einer Trägerstruktur, die zur lösbaren Befestigung an einem Heckgeräteträger der Pistenraupe ausgebildet ist, und die einen Fräskasten (3) trägt, in dem eine Fräswellenanordnung (4) drehbar gelagert ist, die wenigstens zwei Fräswellenteile aufweist, die durch ein Antriebssystem antreibbar sind, ist bekannt. Die Fräswellenteile sind mittels einer zwischen den benachbarten Fräswellenteilen angeordneten Koppeleinrichtung (7) drehschlüssig miteinander gekoppelt, und das Antriebssystem weist einen im Bereich der Koppeleinrichtung angreifenden Riementrieb (9 bis 11) auf, der drehmomentübertragend mit beiden Fräswellenteilen verbunden ist.Rear tiller (1) for a snow groomer for working snow surfaces. Such a rear tiller with a carrier structure which is designed for detachable attachment to a rear implement carrier of the snow groomer and which carries a tiller box (3) in which a tiller shaft arrangement (4) is rotatably mounted, which has at least two tiller shaft parts which can be driven by a drive system are known. The auger shaft parts are coupled to one another in a rotationally locked manner by means of a coupling device (7) arranged between the adjacent auger shaft parts, and the drive system has a belt drive (9 to 11) acting in the area of the coupling device, which is connected to both auger shaft parts in a torque-transmitting manner.

Description

Die Erfindung betrifft eine Heckfräse für eine Pistenraupe zur Schneeflächenbearbeitung mit einer Trägerstruktur, die zur lösbaren Befestigung an einem Heckgeräteträger der Pistenraupe ausgebildet ist, und die einen Fräskasten trägt, in dem eine Fräswellenanordnung drehbar gelagert ist, die wenigstens zwei Fräswellenteile aufweist, die durch ein Antriebssystem antreibbar sind.The invention relates to a rear tiller for a snow groomer for working snow surfaces, with a support structure which is designed for detachable attachment to a rear implement carrier of the snow groomer and which carries a tiller box in which a tiller shaft arrangement is rotatably mounted, which has at least two tiller shaft parts that are driven by a drive system are drivable.

Eine derartige Heckfräse ist aus der DE 10 2006 057 272 B4 bekannt. Die bekannte Heckfräse weist eine Trägerstruktur auf, an der ein mehrteiliger Fräskasten gehalten ist. In dem Fräskasten ist eine Fräswellenanordnung drehbar gelagert, wobei jedem Fräskastenteil jeweils ein Fräswellenteil zugeordnet ist. Im Schleppbetrieb der Heckfräse hinter dem Fräskasten ist eine Finisheranordnung vorgesehen, die durch die Fräswellenanordnung zerkleinerte Schneekorngrößen verdichtet und glättet.Such a tail cutter is from the DE 10 2006 057 272 B4 known. The well-known rear tiller has a support structure on which a multi-part tiller box is held. A milling shaft arrangement is rotatably mounted in the milling box, with each milling box part being assigned a milling shaft part. When the rear tiller is towed behind the tiller box, a finisher arrangement is provided, which compacts and smoothes snow grain sizes that have been chopped up by the tiller shaft arrangement.

Aufgabe der Erfindung ist es, eine Heckfräse der eingangs genannten Art zu schaffen, die ein gegenüber dem Stand der Technik reduziertes Gewicht sowie eine verbesserte Bauraumverteilung aufweist.The object of the invention is to create a rear tiller of the type mentioned at the outset that has a reduced weight compared to the prior art and an improved distribution of installation space.

Diese Aufgabe wird dadurch gelöst, dass die Fräswellenteile mittels einer zwischen den benachbarten Fräswellenteilen angeordneten Koppeleinrichtung drehschlüssig miteinander gekoppelt sind, und dass das Antriebssystem einen im Bereich der Koppeleinrichtung angreifenden Riementrieb aufweist, der drehmomentübertragend mit beiden Fräswellenteilen verbunden ist. Durch die erfindungsgemäße Lösung werden endseitig an dem Fräskasten angeordnete Antriebsmotoren vermieden. Damit wird endseitig, d.h. an den gegenüberliegenden Stirnseiten des Fräskastens, Bauraum für eine Anordnung jeweils einer Seitenfinishereinheit erzielt. Der mittig zwischen jeweils zwei Fräswellenteilen angreifende Riementrieb gewährleistet einen Antrieb der Fräswellenteile ohne eine endseitige Anordnung entsprechender Antriebsmotoren am Fräskasten. Ein entsprechender Antriebsmotor kann vielmehr in Abstand oberhalb der Fräswellenanordnung am Fräskasten oder einem Abschnitt der Trägerstruktur befestigt sein. Durch die erfindungsgemäße Lösung ist es zudem möglich, jeweils wenigstens zwei Fräswellenteile mittels des Riementriebs und damit mittels eines einzelnen Antriebsmotors anzutreiben. Erfindungsgemäß ergibt sich zudem eine erhöhte Laufruhe. Aufgrund der reduzierten Anzahl von Bauteilen für das Antriebssystem reduzieren sich zwangsläufig auch Herstellkosten für die erfindungsgemäße Heckfräse.This object is achieved in that the auger shaft parts are coupled to one another in a rotationally locked manner by means of a coupling device arranged between the adjacent auger shaft parts, and that the drive system has a belt drive acting in the area of the coupling device, which is connected to both auger shaft parts in a torque-transmitting manner. The solution according to the invention avoids drive motors arranged at the ends of the milling box. In this way, at the end, ie at the opposite end faces of the milling box, space is achieved for an arrangement of a side finisher unit in each case. The belt drive acting in the middle between two milling shaft parts ensures that the milling shaft parts are driven without the corresponding drive motors being arranged on the end of the milling box. Rather, a corresponding drive motor can be fastened at a distance above the milling shaft arrangement on the milling box or on a section of the support structure. The solution according to the invention also makes it possible to drive at least two milling shaft parts by means of the belt drive and thus by means of a single drive motor. According to the invention, increased running smoothness also results. Due to the reduced number of components for the drive system, the production costs for the rear tiller according to the invention are also reduced.

In Ausgestaltung der Erfindung ist die Koppeleinrichtung als einen Winkelversatz zwischen Drehachsen der beiden Fräswellenteile zulassende Gelenkwelle gestaltet. Dadurch ist zum einen eine sichere Drehmomentübertragung zwischen den beiden Fräswellenteilen gewährleistet. Zum anderen ist zwischen den Drehachsen der beiden Fräswellenteile ein Winkelausgleich möglich, so dass die beiden Fräswellenteile nicht zueinander koaxial fluchten müssen, sondern auch in begrenzten Winkeln relativ zueinander verschränkt sein können.In an embodiment of the invention, the coupling device is designed as a cardan shaft allowing an angular offset between the axes of rotation of the two milling shaft parts. On the one hand, this ensures reliable torque transmission between the two milling shaft parts. On the other hand, angle compensation is possible between the axes of rotation of the two milling shaft parts, so that the two milling shaft parts do not have to be coaxially aligned with one another, but can also be twisted relative to one another at limited angles.

In weiterer Ausgestaltung der Erfindung weist der Riementrieb ein koaxial zu einer Drehachse eines Fräswellenteils mit dem Fräswellenteil verbundenes Abtriebsrad auf, das als Hohlrad ausgeführt ist, und die Gelenkwelle durchsetzt das Hohlrad. Das als Abtriebsrad dienende Hohlrad wird von der Gelenkwelle berührungslos durchsetzt. Ein freier Innendurchmesser des Hohlrads ist so groß bemessen, dass auch winklige Ausrichtungen der Gelenkwelle innerhalb des Hohlrads möglich sind, ohne dass die Gelenkwelle ein Inneres des Hohlrads kontaktiert.In a further embodiment of the invention, the belt drive has a driven gear which is connected to the auger shaft part coaxially to an axis of rotation of a auger shaft part and is designed as a ring gear, and the articulated shaft passes through the ring gear. The ring gear, which serves as the output gear, is passed through by the cardan shaft without contact. A free inner diameter of the ring gear is dimensioned so large that angular alignments of the articulated shaft within the ring gear are also possible without the articulated shaft making contact with an interior of the ring gear.

In weiterer Ausgestaltung der Erfindung ist das Hohlrad relativ zu der Gelenkwelle axial verschiebbar angeordnet. Diese Ausgestaltung ermöglicht eine einfache Montage und Demontage entsprechender Funktionskomponenten der Heckfräse, insbesondere der Fräswellenteile, des Riementriebs und der Gelenkwelle.In a further embodiment of the invention, the ring gear is arranged to be axially displaceable relative to the cardan shaft. This configuration enables simple assembly and disassembly of corresponding functional components of the rear tiller, in particular the tiller shaft parts, the belt drive and the cardan shaft.

In weiterer Ausgestaltung der Erfindung ist der Fräswellenteil auf einer dem benachbarten Fräswellenteil zugewandten Stirnseite mit einem als Hohlkörper ausgeführten Antriebsflansch versehen, der die Gelenkwelle außenseitig umschließt und an einem zu dem Fräswellenteil beabstandeten Stirnendbereich mit dem Hohlrad drehschlüssig verbunden ist. Der Hohlkörper ist vorzugsweise glockenartig gestaltet und ermöglicht zum einen die Befestigung an dem Hohlrad des Riementriebs und zum anderen ein berührungsloses Umschließen der Gelenkwelle. Der Hohlkörper ist schließlich stirnseitig an dem zugeordneten Fräswellenteil befestigt. Der als Hohlkörper ausgeführte Verbindungsflansch ist zudem derart gestaltet, dass er zumindest teilweise axial in einen offenen Stirnendbereich des Fräswellenteils eintauchen kann, so dass eine axiale Baulänge des Fräswellenteils trotz der Befestigung des Verbindungsflansches nahezu nicht vergrößert ist.In a further embodiment of the invention, the auger shaft part is provided on a front side facing the adjacent auger shaft part with a drive flange designed as a hollow body, which encloses the cardan shaft on the outside and is non-rotatably connected to the ring gear at an end region spaced apart from the auger shaft part. The hollow body is preferably designed like a bell and on the one hand allows attachment to the ring gear of the belt drive and on the other hand a non-contact enclosing of the cardan shaft. Finally, the hollow body is fastened on the face side to the assigned milling shaft part. The connecting flange designed as a hollow body is also designed in such a way that it can at least partially dip axially into an open front end area of the auger shaft part, so that the axial overall length of the auger shaft part is almost not increased despite the attachment of the connecting flange.

In weiterer Ausgestaltung der Erfindung sind die beiden Fräswellenteile relativ zueinander begrenzt winklig ausrichtbar. Diese Ausgestaltung ist im Betrieb der Heckfräse vorteilhaft, da durch entsprechend V- oder W-förmige Ausrichtung der verschiedenen Fräswellenteile der Heckfräse ein Geradeauslauf der Heckfräse im Schleppbetrieb an der Pistenraupe verbessert werden kann. Die V- oder W-förmige Ausrichtung erfolgt vorzugsweise in einer Ebene, die parallel zu einem zu bearbeitenden Schneeuntergrund ausgerichtet ist. Die winklige Ausrichtung der Fräswellenteile erfolgt vorteilhaft spiegelsymmetrisch zu einer in Schlepprichtung der Heckfräse erstreckten Mittelachse oder einer die Mittelachse aufnehmenden, vertikalen Mittelebene.In a further embodiment of the invention, the two milling shaft parts can be aligned at a limited angle relative to one another. This configuration is advantageous when the rear cutter is in operation, since a straight-line stability of the rear cutter when towing on the snow groomer can be improved by correspondingly V- or W-shaped alignment of the various cutter shaft parts of the rear cutter. The V-shaped or W-shaped alignment is preferably in a plane that is aligned parallel to a snow base to be processed. The angular one Alignment of the tiller shaft parts is advantageously carried out mirror-symmetrically to a central axis extending in the towing direction of the rear tiller or to a vertical central plane receiving the central axis.

In weiterer Ausgestaltung der Erfindung ist ein Antriebsmotor des Antriebssystems in Abstand oberhalb des Hohlrads an der Trägerstruktur oder dem Fräskasten montiert, und der Antriebsmotor ist mit einem Antriebsrad des Riementriebs gekoppelt. Der Antriebsmotor ist vorzugsweise hydraulisch oder elektrisch ausgeführt. Vorteilhaft ist jeweils ein Antriebsmotor für jeweils zwei benachbarte Fräswellenteile vorgesehen. Falls demzufolge die Fräswellenanordnung vier Fräswellenteile aufweist, sind vorteilhaft zwei Antriebsmotoren und zwei Riementriebe vorgesehen. Der Fräskasten ist je nach Anzahl der Fräswellenteile mehrteilig ausgeführt, so dass für jeweils einen Fräswellenteil jeweils ein den Fräswellenteil in Abstand umgebendes Prallgehäuseteil vorgesehen ist. Die Prallgehäuseteile sind an der Trägerstruktur gehalten.In a further embodiment of the invention, a drive motor of the drive system is mounted at a distance above the ring gear on the support structure or the milling box, and the drive motor is coupled to a drive wheel of the belt drive. The drive motor is preferably hydraulic or electric. One drive motor is advantageously provided for each two adjacent milling shaft parts. Accordingly, if the auger shaft arrangement has four auger shaft parts, two drive motors and two belt drives are advantageously provided. Depending on the number of milling shaft parts, the milling box is made in several parts, so that for each milling shaft part there is an impact housing part surrounding the milling shaft part at a distance. The baffle housing parts are held to the support structure.

In weiterer Ausgestaltung der Erfindung ist der Riementrieb als Zahnriementrieb ausgeführt. Hierdurch ergibt sich eine verlustarme Drehmomentübertragung des Antriebsmotors auf die Fräswellenteile.In a further embodiment of the invention, the belt drive is designed as a toothed belt drive. This results in low-loss torque transmission from the drive motor to the milling shaft parts.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus den Ansprüchen sowie aus der nachfolgenden Beschreibung eines bevorzugten Ausführungsbeispiels der Erfindung, das anhand der Zeichnungen dargestellt ist.

Fig. 1
zeigt in einem quer zur Schlepprichtung ausgerichteten Längsschnitt eine Ausführungsform einer erfindungsgemäßen Heckfräse,
Fig. 2
einen Teilbereich der Heckfräse gemäß Fig. 1 in vergrößerter Darstellung,
Fig. 3
einen Querschnitt durch die Heckfräse gemäß den Fig. 1 und 2 entlang der Schnittlinie III-III in Fig. 2,
Fig. 4
die Darstellung gemäß Fig. 3, jedoch als vergrößerter Teilbereich,
Fig. 5
in vergrößerter Schnittdarstellung eine Koppeleinrichtung für zwei benachbarte Fräswellenteile der Heckfräse nach den Fig. 1 bis 4 und
Fig. 6
die Koppeleinrichtung gemäß Fig. 5, jedoch in einer Montagestellung.
Further advantages and features of the invention result from the claims and from the following description of a preferred exemplary embodiment of the invention, which is illustrated with the aid of the drawings.
1
shows an embodiment of a rear tiller according to the invention in a longitudinal section oriented transversely to the towing direction,
2
according to a section of the rear tiller 1 in enlarged view,
3
a cross section through the rear tiller according to the 1 and 2 along section line III-III in 2 ,
4
the representation according to 3 , but as an enlarged section,
figure 5
in an enlarged sectional view of a coupling device for two adjacent milling shaft parts of the rear tiller according to Figures 1 to 4 and
6
the coupling device according to figure 5 , but in an assembly position.

Eine Heckfräse 1 nach den Fig. 1 bis 6 ist für ein Kettenfahrzeug in Form einer Pistenraupe vorgesehen. Die Heckfräse 1 dient zur Bearbeitung von Schneeoberflächen in Wintersportgebieten. Die Heckfräse wird heckseitig lösbar an die Pistenraupe angebaut. Hierzu weist die Pistenraupe in grundsätzlich bekannter Weise einen Heckgeräteträger auf, mit dem die Heckfräse 1 verbunden wird.A rear tiller 1 after the Figures 1 to 6 is intended for a tracked vehicle in the form of a snow groomer. The rear tiller 1 is used for processing snow surfaces in winter sports areas. The rear tiller is detachably attached to the rear of the snow groomer. For this purpose, the snow groomer has, in a manner known in principle, a rear implement carrier to which the rear tiller 1 is connected.

Die Heckfräse 1 ist mit einer mittig angeordneten Haltevorrichtung 5 versehen, die mit einer Trägerstruktur 2 der Heckfräse 1 fest verbunden ist. Die Haltevorrichtung 5 weist, wie anhand der Fig. 3 erkennbar ist, einen Aufnahmehaken 8 auf, über den die Heckfräse 1 an dem nicht dargestellten Heckgeräteträger der Pistenraupe befestigt wird. Die Trägerstruktur 2 trägt einen Fräskasten 3, der zur Aufnahme einer Fräswellenanordnung 4 vorgesehen ist. Dabei ist der Fräskasten 3 mehrteilig gestaltet und weist beim dargestellten Ausführungsbeispiel zwei Fräsgehäuseteile auf, in dem jeweils ein Fräswellenteil der Fräswellenanordnung 4 drehbar gelagert ist.The rear tiller 1 is provided with a centrally arranged holding device 5 which is firmly connected to a support structure 2 of the rear tiller 1 . The holding device 5 has, as shown in FIG 3 can be seen, a hook 8 on which the rear tiller 1 is attached to the rear implement carrier, not shown, of the snow groomer. The support structure 2 carries a milling box 3 which is provided for receiving a milling shaft arrangement 4 . The milling box 3 is designed in several parts and, in the exemplary embodiment shown, has two milling housing parts, in each of which a milling shaft part of the milling shaft arrangement 4 is rotatably mounted.

Die Heckfräse 1 weist in Schlepprichtung hinter der Fräswellenanordnung 4 eine Finisheranordnung F auf. Zudem sind dem Fräskasten 3 an gegenüberliegenden Stirnseiten Seitenfinisher S zugeordnet, die in Fig. 1 nicht dargestellt sind.The rear tiller 1 has a finisher arrangement F behind the tiller shaft arrangement 4 in the towing direction. In addition, side finishers S are assigned to the milling box 3 on opposite front sides, which in 1 are not shown.

Wie anhand der Fig. 2 und 5, 6 gut erkennbar ist, sind die beiden Fräsgehäuseteile des Fräskastens 3, die die beiden Fräswellenteile 4 umschließen, mit geringem axialen Abstand quer zur Schlepprichtung der Heckfräse 1 zueinander gehalten. Der eine Fräsgehäuseteil ist gegenüber dem benachbarten Fräsgehäuseteil des Fräskastens 3 begrenzt winklig ausrichtbar, wie Fig. 5 entnommen werden kann. Die beiden in dem jeweiligen Fräsgehäuseteil drehbar gelagerten Fräswellenteile 4 sind analog der Prallgehäuseteile quer zur Schlepprichtung axial zueinander beabstandet. Die Fräswellenteile 4 sind bei fluchtenden Drehachsen D1 und D2 koaxial zueinander ausgerichtet und über eine nachfolgend näher beschriebene Koppeleinrichtung 7 miteinander drehmomentübertragend gekoppelt. Die drehmomentübertragende Kopplung der beiden Fräswellenteile 4 relativ zueinander erfolgt über eine Gelenkwelle 12, die winklige Ausrichtungen der Fräswellenteile 4 relativ zueinander zulässt und dennoch eine sichere Drehmomentübertragung gewährleistet.How based on 2 and 5, 6 It can be clearly seen that the two milling housing parts of the milling box 3, which enclose the two milling shaft parts 4, are held at a small axial distance from one another transversely to the towing direction of the rear tiller 1. One milling housing part can be angularly aligned to a limited extent relative to the adjacent milling housing part of the milling box 3, such as figure 5 can be removed. The two milling shaft parts 4, which are rotatably mounted in the respective milling housing part, are spaced apart axially from one another, analogously to the impact housing parts, transversely to the towing direction. The milling shaft parts 4 are aligned coaxially to one another with aligned axes of rotation D 1 and D 2 and are coupled to one another in a torque-transmitting manner via a coupling device 7 described in more detail below. The torque-transmitting coupling of the two milling shaft parts 4 relative to one another takes place via an articulated shaft 12, which permits angular alignments of the milling shaft parts 4 relative to one another and nevertheless ensures reliable torque transmission.

Der in den Fig. 1 und 2 sowie 5, 6 rechte Fräswellenteil 4 wird durch ein Antriebssystem angetrieben, das einen Antriebsmotor 6 sowie einen Riementrieb 9 bis 11 aufweist. Der Riementrieb 9 bis 11 ist mit einem Abtriebsrad in Form eines Hohlrads 10 sowie mit einem Antriebsrad 9 versehen, das drehfest auf einer nicht näher bezeichneten Antriebswelle des Antriebsmotors 6 gehalten ist. Das Antriebsrad 9 und das Hohlrad 10 sind über einen umlaufenden Zahnriemen 11 miteinander verbunden. Das Hohlrad 10 ist über einen als Hohlkörper ausgeführten Antriebsflansch 16 mit einem Stirnendbereich 13 des rechten Fräswellenteils 4 verbunden. Der Stirnendbereich 13 ist mithilfe einer Wälzlagerung 14 an einem Lagerflansch 15 drehbar gehalten, der fest mit dem Fräsgehäuseteil des Fräskastens 3 verbunden ist.The in the 1 and 2 and 5, 6 right milling shaft part 4 is driven by a drive system which has a drive motor 6 and a belt drive 9 to 11. The belt drive 9 to 11 is provided with a driven wheel in the form of a ring gear 10 and with a drive wheel 9 which is held in a rotationally fixed manner on a drive shaft of the drive motor 6 (not designated in any more detail). The drive wheel 9 and the ring gear 10 are one circulating toothed belt 11 connected to each other. The ring gear 10 is connected to a front end area 13 of the right-hand milling shaft part 4 via a drive flange 16 designed as a hollow body. The front end area 13 is held rotatably by means of a roller bearing 14 on a bearing flange 15 which is firmly connected to the milling housing part of the milling box 3 .

Die Gelenkwelle 12 weist zwei nicht näher bezeichnete Wellenflanschabschnitte auf, die mittels eines mittigen Gelenkabschnitts miteinander verbunden sind. Die beiden Wellenflansche sind mit den gegenüberliegenden Stirnendbereichen 13 der beiden Fräswellenteile 4 drehfest verbunden. Wie anhand der Fig. 5 und 6 gut erkennbar ist, ist die Gelenkwelle 12 innerhalb des als glockenförmiger Hohlkörper gestalteten Antriebsflansches 16 und innerhalb des Hohlrads 10 montiert, so dass die Gelenkwelle 12 das Hohlrad 10 im betriebsfertig montierten Zustand an dem Antriebsflansch 16 berührungsfrei koaxial zu den Drehachsen D1 und D2 der Fräswellenteile 4 durchsetzt.The cardan shaft 12 has two shaft flange sections, not designated in any more detail, which are connected to one another by means of a central joint section. The two shaft flanges are non-rotatably connected to the opposite end regions 13 of the two milling shaft parts 4 . How based on Figures 5 and 6 is clearly visible, the cardan shaft 12 is mounted inside the drive flange 16, which is designed as a bell-shaped hollow body, and inside the ring gear 10, so that the cardan shaft 12 can drive the ring gear 10 coaxially to the axes of rotation D 1 and D 2 of the Milling shaft parts 4 interspersed.

Für eine Montage oder Demontage der verschiedenen, zuvor beschriebenen Funktionskomponenten der Koppeleinrichtung 7 kann in einfacher Weise das Hohlrad 10, das mit Schraubverbindungen mit dem als Hohlkörper gestalteten Antriebsflansch 16 verbunden ist, von dem Antriebsflansch 16 gelöst und axial zu dem benachbarten Fräswellenteil 4 hin verschoben werden, wie dies in Fig. 6 erkennbar ist. In dieser Stellung ist ein Zugriff auf die Gelenkwelle 12 und auf die Befestigung an den Stirnendbereichen 13 der Fräswellenteile 14 ermöglicht, so dass die Koppeleinrichtung 7 montiert oder demontiert werden kann, ohne die Fräsgehäuseteile oder die Fräswellenteile 4 entfernen zu müssen.For assembly or disassembly of the various functional components of the coupling device 7 described above, the ring gear 10, which is connected with screw connections to the drive flange 16 designed as a hollow body, can be detached from the drive flange 16 and moved axially towards the adjacent milling shaft part 4 , like this in 6 is recognizable. In this position, access to the articulated shaft 12 and to the attachment to the end regions 13 of the auger shaft parts 14 is enabled, so that the coupling device 7 can be assembled or disassembled without having to remove the auger housing parts or the auger shaft parts 4 .

Claims (8)

Heckfräse (1) für eine Pistenraupe zur Schneeflächenbearbeitung mit einer Trägerstruktur (2), die zur lösbaren Befestigung an einem Heckgeräteträger der Pistenraupe ausgebildet ist, und die einen Fräskasten (3) trägt, in dem eine Fräswellenanordnung (4) drehbar gelagert ist, die wenigstens zwei Fräswellenteile aufweist, die durch ein Antriebssystem antreibbar sind, dadurch gekennzeichnet, dass die Fräswellenteile mittels einer zwischen den benachbarten Fräswellenteilen angeordneten Koppeleinrichtung (7) drehschlüssig miteinander gekoppelt sind, und dass das Antriebssystem einen im Bereich der Koppeleinrichtung (7) angreifenden Riementrieb (9 bis 11) aufweist, der drehmomentübertragend mit beiden Fräswellenteilen verbunden ist.Rear tiller (1) for a snow groomer for working snow surfaces, with a support structure (2) which is designed for detachable attachment to a rear implement carrier of the snow groomer and which carries a tiller box (3) in which a tiller shaft arrangement (4) is rotatably mounted, which is at least has two milling shaft parts which can be driven by a drive system, characterized in that the milling shaft parts are coupled to one another in a rotationally locked manner by means of a coupling device (7) arranged between the neighboring milling shaft parts, and in that the drive system has a belt drive (9 to 11), which is connected to both cutter shaft parts in a torque-transmitting manner. Heckfräse (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Koppeleinrichtung (7) eine einen Winkelversatz zwischen Drehachsen (D1, D2) der beiden Fräswellenteile zulassende Gelenkwelle aufweist.Rear tiller (1) according to Claim 1, characterized in that the coupling device (7) has a cardan shaft permitting an angular offset between the axes of rotation (D 1 , D 2 ) of the two tiller shaft parts. Heckfräse (1) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Riementrieb (9 bis 11) ein koaxial zu einer Drehachse (D1, D2) eines Fräswellenteils mit dem Fräswellenteil verbundenes Abtriebsrad aufweist, das als Hohlrad (10) ausgeführt ist, und dass die Gelenkwelle (12) das Hohlrad (10) durchsetzt.Rear tiller (1) according to Claim 1 or 2, characterized in that the belt drive (9 to 11) has a driven wheel which is designed as a ring gear (10) and is connected coaxially to an axis of rotation (D 1 , D 2 ) of a tiller shaft part with the tiller shaft part , and that the cardan shaft (12) passes through the ring gear (10). Heckfräse (1) nach Anspruch 3, dadurch gekennzeichnet, dass das Hohlrad (10) relativ zu der Gelenkwelle (12) axial verschiebbar angeordnet ist.Rear tiller (1) according to claim 3, characterized in that the ring gear (10) is arranged to be axially displaceable relative to the articulated shaft (12). Heckfräse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Fräswellenteil auf einer dem benachbarten Fräswellenteil zugewandten Stirnseite mit einem als Hohlkörper ausgeführten Antriebsflansch (16) versehen ist, der die Gelenkwelle (12) außenseitig umschließt und an einem zu dem Fräswellenteil beabstandeten Stirnendbereich mit dem Hohlrad (10) drehschlüssig verbunden ist.Rear tiller (1) according to one of the preceding claims, characterized in that the tiller shaft part is provided on a front side facing the adjacent tiller shaft part with a drive flange (16) designed as a hollow body, which encloses the cardan shaft (12) on the outside and at a distance from the tiller shaft part The front end area is connected in a rotationally locked manner to the ring gear (10). Heckfräse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die beiden Fräswellenteile relativ zueinander begrenzt winklig ausrichtbar sind.Rear tiller (1) according to one of the preceding claims, characterized in that the two tiller shaft parts can be aligned at a limited angle relative to one another. Heckfräse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass ein Antriebsmotor (6) des Antriebssystems in Abstand oberhalb des Hohlrads (10) an der Trägerstruktur (2) oder dem Fräskasten (3) montiert ist, und dass der Antriebsmotor (6) mit einem Antriebsrad (9) des Riementriebs (9 bis 11) gekoppelt ist.Rear tiller (1) according to one of the preceding claims, characterized in that a drive motor (6) of the drive system is mounted at a distance above the ring gear (10) is mounted on the support structure (2) or the milling box (3), and that the drive motor (6) is coupled to a drive wheel (9) of the belt drive (9 to 11). Heckfräse (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Riementrieb als Zahnriementrieb ausgeführt ist.Rear tiller (1) according to one of the preceding claims, characterized in that the belt drive is designed as a toothed belt drive.
EP21209765.3A 2020-12-11 2021-11-23 Rear tiller for a snow groomer for preparation of a snow surface Active EP4012101B1 (en)

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