EP2319988B1 - Rear end construction device for a piste caterpillar - Google Patents

Rear end construction device for a piste caterpillar Download PDF

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Publication number
EP2319988B1
EP2319988B1 EP10014317.1A EP10014317A EP2319988B1 EP 2319988 B1 EP2319988 B1 EP 2319988B1 EP 10014317 A EP10014317 A EP 10014317A EP 2319988 B1 EP2319988 B1 EP 2319988B1
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EP
European Patent Office
Prior art keywords
tiller
housing
shafts
mounted unit
milling
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EP10014317.1A
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German (de)
French (fr)
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EP2319988A2 (en
EP2319988A3 (en
Inventor
Martin Nusser
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Kassbohrer Gelandefahrzeug AG
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Kassbohrer Gelandefahrzeug AG
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Publication of EP2319988A3 publication Critical patent/EP2319988A3/en
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    • 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 attachment for a snowcat with a Fräswellenan Aunt comprising at least two milling cutter provided with cutter shafts, which are rotatably mounted in housing sections of a milling housing.
  • Such a rear attachment for a snow groomer is well known for the care and processing of snowplow surfaces.
  • the rear attachment is arranged on the rear of the snow groomer and is towed by the snow groomer during operation.
  • the rear attachment has a milling housing which extends across the entire width of the snow groomer transverse to the direction of the tow.
  • the milling housing has two housing sections, which are arranged side by side transversely to the direction of the tractor.
  • a milling shaft is rotatably mounted in each case, which is provided at its periphery with a plurality of cutting teeth.
  • the two cutting shafts extend in alignment with each other transversely to the direction of the towing attachment of the rear attachment and thus in the longitudinal direction of the milling housing.
  • Both milling shafts are driven synchronously by a hydraulic drive device.
  • Towing direction behind the milling housing is a Finisher arrangement provided that smoothes the surface machined by the cutter shafts surface in towing operation and compacted.
  • the object of the invention is to provide a rear mounted implement of the type mentioned, which allows an improved processing of a piste surface.
  • the milling shafts are inclined relative to a housing longitudinal axis of the milling housing.
  • the oblique position of the cutting shafts according to the invention leads to an oblique position of the milling teeth distributed on the circumference of each milling shaft.
  • the inclination of these cutting teeth results in milling the snow and ice surface in addition to a separation function of the cutting teeth a blade effect of the cutting teeth.
  • an improved promotion of snow and ice chunks is achieved by the Fräswellen in the milling housing inside. This in turn leads to an improved crushing of snow and ice chunks between the rotating cutting teeth of each milling shaft and the corresponding housing sections of the milling housing.
  • an overall improved milling function and, consequently, an improved machining of the runway surface can be achieved. It is also possible, due to the improved milling and machining function to reduce the number of cutting teeth on the circumference of each milling shaft and still achieve at least as good machining results as in known milling shafts without inclination. A reduced number of cutting teeth leads to a cheaper production of the milling shaft and a lower susceptibility to wear. The inclination of the cutter shafts covered during driving corresponding impressions of the chain webs of the chain drives. As a result, a quieter milling run is achieved.
  • the orientation of the finisher assembly remains straight during an inclination of the cutter shafts.
  • the slope of the machined slope surface is thus not affected by the inclination of the Fräswellen.
  • the milling shafts are mirror-symmetrically relative to each other with respect to a vertical central longitudinal plane of the rear mounted implement aligned.
  • the central longitudinal plane is defined vertically in the towing direction of the rear attachment.
  • the milling shafts are mounted by means of pendulum roller bearings in the housing sections.
  • Suitable self-aligning bearings are self-aligning ball bearings or spherical roller bearings. In both cases, it is possible to pivot inner ring, cage and rolling elements of the pendulum rolling bearing by a few degrees from the center position. As a result, the inclination of the cutter shafts can be compensated.
  • each cutter shaft is inclined relative to the housing longitudinal axis, between 1 ° and 5 °.
  • an inclination of each milling shaft is selected by an angle of about 3 °.
  • Such an inclination angle of about 3 ° creates a particularly advantageous slope processing.
  • the inclined milling shafts are arranged within the milling housing such that these are positioned behind a snow groomer in the area of the runway surface processed by track drives of the snow groomer during towing operation of the rear attachment.
  • the cutter shafts are therefore used in particular for processing the slope surface already preloaded and pre-machined by corresponding chain webs of the chain drives.
  • the cutting shafts are tilted so that they extend in the drag operation of the rear attachments from the outside to the middle obliquely backwards - related to a towing direction - extend.
  • a Heckanbauêt 1 after the Fig. 1 and 2 is intended for rear attachment to a tracked vehicle in the form of a snowcat.
  • the rear attachment 1 represents a rear tiller to machine snow piste surfaces.
  • the rear attachment 1 is towed while driving the snow groomer of the snow groomer.
  • the rear attachment 1 extends at least over an entire width the snowcat.
  • the right half of the rear attachment 1, not shown, is designed mirror-symmetrically to the illustrated left half, with the mirror plane serving as a vertical center longitudinal plane of the rear attachment 1.
  • the central longitudinal plane extends in the longitudinal direction of the snowcat and thus in the towing direction of the rear attachment 1.
  • the rear attachment 1 has a milling housing, which is divided into a left housing section 2 and a right housing section. Each housing section 2 is open to a substrate and has a longitudinal extent extending transversely to the direction of the towing, which is symbolized by a longitudinal axis L. Towards the rear, the finisher assembly 3 adjoins the milling housing, which is designed as a flexible smoothing device for smoothing and compacting the processed snow runway surface. The finisher assembly 3 is arranged on the back side of the milling housing. Each housing section 2 has at its opposite end faces an approximately vertical and extended in the direction of drag wall termination, in each of which a bearing 8 is provided for the rotatable mounting of a cutter shaft 5.
  • the bearing 8 on each side of the cutter shaft 5 is executed in the illustrated embodiment as a pendulum roller bearing, in particular as spherical roller bearings.
  • the milling shaft 5 is designed as a substantially cylindrical roller which, distributed over its outer surface over the entire length of the milling shaft 5, carries a multiplicity of milling teeth 6 projecting in radial planes relative to the central longitudinal axis of the milling shaft 5.
  • the milling shaft 5 is provided with a drive pinion 7, on which a transmission element of a drive unit engages in order to drive the milling shaft for rotation.
  • a side finisher 4 is arranged on the end wall termination of the housing section 2, which allows smoothing and compression of the runway surface laterally next to the milling housing.
  • the milling shaft 5 is inclined relative to the longitudinal axis L of the housing portion 2 and thus relative to a transverse direction of the rear mounted implement - based on a driving operation.
  • the milling shaft 5 is within a horizontal plane of the housing portion 2, in this case within the Fig. 1 defined plane of drawing, inclined at an angle between 1 ° and 3 ° relative to the longitudinal axis L.
  • the milling shaft 5 extends from an inner central arrangement of obliquely outwards and in the direction of the tow towards the front.
  • the inclination of the cutting teeth 6 is selected such that the cutting teeth in the towing operation of the moving snow groomer in addition to crushing the snow track surface to be machined achieve a blade effect to the side. As a result, the promotion of crushing snow and ice in the milling housing and thus in the housing section 2 is improved.
  • the bearings 8 are held in the end wall terminations of the housing section 2 in horizontal longitudinal guides or slot sections of the respective Wandungsab gleiches, so that an individual adjustment and adjustment of the respective desired angle of inclination of the Fräswelle 5 between 0 ° and a maximum of 5 ° relative to the longitudinal axis L of the housing section 2 is made possible.
  • a particularly preferred, not shown embodiment of the invention has adjusting means for changing the oblique orientation angle of the milling shaft.
  • These adjusting means can be mechanically adjustable at standstill of the milling cutter.
  • the adjusting means are assigned electrical, hydraulic or pneumatic control means in order to enable a control of the actuating means during a driving operation of the snow groomer.
  • the control means are preferably controlled from the cockpit of the snow groomer. But it is also possible to control the control means via an electronic control according to criteria that are specified by a suitable software.

Description

Die Erfindung betrifft ein Heckanbaugerät für eine Pistenraupe mit einer Fräswellenanordnung, die wenigstens zwei mit Fräszähnen versehene Fräswellen umfasst, die in Gehäuseabschnitten eines Fräsengehäuses drehbar gelagert sind.The invention relates to a rear attachment for a snowcat with a Fräswellenanordnung comprising at least two milling cutter provided with cutter shafts, which are rotatably mounted in housing sections of a milling housing.

Ein derartiges Heckanbaugerät für eine Pistenraupe ist zur Pflege und zur Bearbeitung von Schneepistenoberflächen allgemein bekannt. Das Heckanbaugerät ist heckseitig an der Pistenraupe angeordnet und wird im Betrieb von der Pistenraupe geschleppt. Das Heckanbaugerät weist ein Fräsengehäuse auf, das sich quer zur Schlepprichtung über eine gesamte Breite der Pistenraupe erstreckt. Das Fräsengehäuse weist zwei Gehäuseabschnitte auf, die quer zur Schlepprichtung nebeneinander angeordnet sind. In jedem Gehäuseabschnitt ist jeweils eine Fräswelle drehbar gelagert, die an ihrem Umfang mit einer Vielzahl von Fräszähnen versehen ist. Die beiden Fräswellen erstrecken sich fluchtend zueinander quer zur Schlepprichtung des Heckanbaugerätes und damit in Längsrichtung des Fräsengehäuses. Beide Fräswellen werden synchron durch eine hydraulische Antriebsvorrichtung angetrieben. In Schlepprichtung hinter dem Fräsengehäuse ist eine Finisheranordnung vorgesehen, die die durch die Fräswellen bearbeitete Pistenoberfläche im Schleppbetrieb glättet und verdichtet.Such a rear attachment for a snow groomer is well known for the care and processing of snowplow surfaces. The rear attachment is arranged on the rear of the snow groomer and is towed by the snow groomer during operation. The rear attachment has a milling housing which extends across the entire width of the snow groomer transverse to the direction of the tow. The milling housing has two housing sections, which are arranged side by side transversely to the direction of the tractor. In each housing section, a milling shaft is rotatably mounted in each case, which is provided at its periphery with a plurality of cutting teeth. The two cutting shafts extend in alignment with each other transversely to the direction of the towing attachment of the rear attachment and thus in the longitudinal direction of the milling housing. Both milling shafts are driven synchronously by a hydraulic drive device. Towing direction behind the milling housing is a Finisher arrangement provided that smoothes the surface machined by the cutter shafts surface in towing operation and compacted.

US 2003/0051376 beschreibt ein Gerät nach Oberbegriff des Anspruchs 1. US 2003/0051376 describes a device according to the preamble of claim 1.

Aufgabe der Erfindung ist es, ein Heckanbaugerät der eingangs genannten Art zu schaffen, das eine verbesserte Bearbeitung einer Pistenoberfläche ermöglicht.The object of the invention is to provide a rear mounted implement of the type mentioned, which allows an improved processing of a piste surface.

Diese Aufgabe wird dadurch gelöst, dass die Fräswellen relativ zu einer Gehäuselängsachse des Fräsengehäuses schräggestellt sind. Die erfindungsgemäße Schrägstellung der Fräswellen führt zu einer Schrägstellung der auf dem Umfang jeder Fräswelle verteilten Fräszähne. Die Schrägstellung dieser Fräszähne ergibt beim Fräsen der Schnee- und Eisoberfläche zusätzlich zu einer Trennfunktion der Fräszähne eine Schaufelwirkung der Fräszähne. Hierdurch wird eine verbesserte Förderung von Schnee- und Eisbrocken durch die Fräswellen in das Fräsengehäuse hinein erzielt. Dies führt wiederum zu einer verbesserten Zerkleinerung von Schnee- und Eisbrocken zwischen den rotierenden Fräszähnen jeder Fräswelle und den korrespondierenden Gehäuseabschnitten des Fräsengehäuses. Hierdurch ist insgesamt eine verbesserte Fräsfunktion und demzufolge eine verbesserte Bearbeitung der Pistenoberfläche erzielbar. Es ist auch möglich, aufgrund der verbesserten Fräs- und Bearbeitungsfunktion die Anzahl von Fräszähnen auf dem Umfang jeder Fräswelle zu reduzieren und dennoch ein zumindest gleich gutes Bearbeitungsergebnis wie bei bekannten Fräswellen ohne Schrägstellung zu erzielen. Eine reduzierte Anzahl von Fräszähnen führt zu einer kostengünstigeren Herstellung der Fräswelle und zu einer geringeren Verschleißanfälligkeit. Die Schrägstellung der Fräswellen überdeckt im Fahrbetrieb entsprechende Eindrücke der Kettenstege der Kettenlaufwerke. Hierdurch wird ein ruhigerer Fräsenlauf erzielt.This object is achieved in that the milling shafts are inclined relative to a housing longitudinal axis of the milling housing. The oblique position of the cutting shafts according to the invention leads to an oblique position of the milling teeth distributed on the circumference of each milling shaft. The inclination of these cutting teeth results in milling the snow and ice surface in addition to a separation function of the cutting teeth a blade effect of the cutting teeth. As a result, an improved promotion of snow and ice chunks is achieved by the Fräswellen in the milling housing inside. This in turn leads to an improved crushing of snow and ice chunks between the rotating cutting teeth of each milling shaft and the corresponding housing sections of the milling housing. As a result, an overall improved milling function and, consequently, an improved machining of the runway surface can be achieved. It is also possible, due to the improved milling and machining function to reduce the number of cutting teeth on the circumference of each milling shaft and still achieve at least as good machining results as in known milling shafts without inclination. A reduced number of cutting teeth leads to a cheaper production of the milling shaft and a lower susceptibility to wear. The inclination of the cutter shafts covered during driving corresponding impressions of the chain webs of the chain drives. As a result, a quieter milling run is achieved.

Die Ausrichtung der Finisheranordnung bleibt während einer Schrägstellung der Fräswellen gerade. Das Pistenbild der bearbeiteten Pistenoberfläche wird durch die Schrägstellung der Fräswellen somit nicht beeinträchtigt.The orientation of the finisher assembly remains straight during an inclination of the cutter shafts. The slope of the machined slope surface is thus not affected by the inclination of the Fräswellen.

In Ausgestaltung der Erfindung sind die Fräswellen spiegelsymmetrisch zueinander bezogen auf eine vertikale Mittellängsebene des Heckanbaugerätes-ausgerichtet. Die Mittellängsebene ist vertikal in Schlepprichtung des Heckanbaugerätes definiert. Die spiegelsymmetrische Schrägstellung der benachbarten Fräswellen ermöglicht eine symmetrische Bearbeitung der Pistenoberfläche.In an embodiment of the invention, the milling shafts are mirror-symmetrically relative to each other with respect to a vertical central longitudinal plane of the rear mounted implement aligned. The central longitudinal plane is defined vertically in the towing direction of the rear attachment. The mirror-symmetric inclination of the adjacent cutting shafts enables symmetrical machining of the runway surface.

In weiterer Ausgestaltung der Erfindung sind die Fräswellen mit Hilfe von Pendelwälzlagerungen in den Gehäuseabschnitten gelagert. Geeignete Pendelwälzlagerungen sind Pendelkugellager oder Pendelrollenlager. In beiden Fällen ist es möglich, Innenring, Käfig und Wälzelemente der Pendelwälzlagerung um wenige Winkelgrade aus der Mittelstellung zu schwenken. Dadurch kann die Schrägstellung der Fräswellen ausgeglichen werden.In a further embodiment of the invention, the milling shafts are mounted by means of pendulum roller bearings in the housing sections. Suitable self-aligning bearings are self-aligning ball bearings or spherical roller bearings. In both cases, it is possible to pivot inner ring, cage and rolling elements of the pendulum rolling bearing by a few degrees from the center position. As a result, the inclination of the cutter shafts can be compensated.

In weiterer Ausgestaltung der Erfindung liegt ein Winkelbereich, um den jede Fräswelle relativ zu der Gehäuselängsachse schräggestellt ist, zwischen 1° und 5°. Besonders bevorzugt wird eine Schrägstellung jeder Fräswelle um einen Winkel von etwa 3° gewählt. Ein derartiger Schrägstellungswinkel von ca. 3° schafft eine besonders vorteilhafte Pistenbearbeitung. Gleichzeitig ist es möglich, einen derartigen Winkelbereich durch entsprechende Pendelwälzlagerung auszugleichen, ohne zusätzlich Lagerungsmaßnahmen ergreifen zu müssen.In a further embodiment of the invention is an angular range by which each cutter shaft is inclined relative to the housing longitudinal axis, between 1 ° and 5 °. Particularly preferably, an inclination of each milling shaft is selected by an angle of about 3 °. Such an inclination angle of about 3 ° creates a particularly advantageous slope processing. At the same time it is possible to compensate for such an angular range by appropriate pendulum roller bearing, without having to take additional storage measures.

In weiterer Ausgestaltung der Erfindung sind die schräggestellten Fräswellen derart innerhalb des Fräsengehäuses angeordnet, dass diese im Schleppbetrieb des Heckanbaugerätes hinter einer Pistenraupe im Bereich der durch Kettenlaufwerke der Pistenraupe bearbeiteten Pistenoberfläche positioniert sind. Die Fräswellen dienen daher insbesondere zur Aufarbeitung der durch entsprechende Kettenstege der Kettenlaufwerke bereits vorbelasteten und vorbearbeiteten Pistenoberfläche.In a further embodiment of the invention, the inclined milling shafts are arranged within the milling housing such that these are positioned behind a snow groomer in the area of the runway surface processed by track drives of the snow groomer during towing operation of the rear attachment. The cutter shafts are therefore used in particular for processing the slope surface already preloaded and pre-machined by corresponding chain webs of the chain drives.

In weiterer Ausgestaltung der Erfindung sind die Fräswellen derart schräggestellt, dass sie im Schleppbetrieb des Heckanbaugerätes sich von außen her zur Mitte hin schräg nach hinten - auf eine Schlepprichtung bezogen - erstrecken. Dadurch ist eine besonders vorteilhafte Bearbeitungswirkung durch die Fräswellen und die zugeordneten Fräszähne innerhalb der Gehäuseabschnitte erzielbar.In a further embodiment of the invention, the cutting shafts are tilted so that they extend in the drag operation of the rear attachments from the outside to the middle obliquely backwards - related to a towing direction - extend. As a result, a particularly advantageous machining effect can be achieved by the milling shafts and the associated cutting teeth within the housing sections.

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 einer Ansicht von unten einen im Schleppbetrieb linken Teil einer Ausführungsform eines erfindungsgemäßen Heckanbaugerätes für eine Pistenraupe,
Fig. 2
den in Fig. 1 dargestellten Teil des Heckanbaugerätes in perspektivischer Darstellung schräg von unten.
Further advantages and features of the invention will become apparent from the claims and from the following description of a preferred embodiment of the invention, which is illustrated by the drawings.
Fig. 1
shows in a view from below a towing operation left part of an embodiment of a rear attachment according to the invention for a snowcat,
Fig. 2
the in Fig. 1 shown part of the rear mounted implement in a perspective view obliquely from below.

Ein Heckanbaugerät 1 nach den Fig. 1 und 2 ist für einen heckseitigen Anbau an ein Kettenfahrzeug in Form einer Pistenraupe vorgesehen. Das Heckanbaugerät 1 stellt eine Heckfräse dar, um Schneepistenoberflächen zu bearbeiten. Das Heckanbaugerät 1 wird im Fahrbetrieb der Pistenraupe von der Pistenraupe geschleppt. Das Heckanbaugerät 1 erstreckt sich wenigstens über eine gesamte Breite der Pistenraupe. In den Fig. 1 und 2 ist lediglich eine im Schleppbetrieb linke Hälfte des Heckanbaugerätes 1 dargestellt. Die nicht dargestellte rechte Hälfte des Heckanbaugerätes 1 ist spiegelsymmetrisch zu der dargestellten linken Hälfte gestaltet, wobei als Spiegelebene eine vertikale Mittellängsebene des Heckanbaugerätes 1 dient. Die Mittellängsebene erstreckt sich in Längsrichtung der Pistenraupe und damit in Schlepprichtung des Heckanbaugerätes 1.A Heckanbaugerät 1 after the Fig. 1 and 2 is intended for rear attachment to a tracked vehicle in the form of a snowcat. The rear attachment 1 represents a rear tiller to machine snow piste surfaces. The rear attachment 1 is towed while driving the snow groomer of the snow groomer. The rear attachment 1 extends at least over an entire width the snowcat. In the Fig. 1 and 2 is only one in tow mode left half of the rear implement 1 shown. The right half of the rear attachment 1, not shown, is designed mirror-symmetrically to the illustrated left half, with the mirror plane serving as a vertical center longitudinal plane of the rear attachment 1. The central longitudinal plane extends in the longitudinal direction of the snowcat and thus in the towing direction of the rear attachment 1.

Das Heckanbaugerät 1 weist ein Fräsengehäuse auf, das in einen linken Gehäuseabschnitt 2 und einen rechten Gehäuseabschnitt unterteilt ist. Jeder Gehäuseabschnitt 2 ist zu einem Untergrund hin offen und weist eine sich quer zur Schlepprichtung erstreckende Längserstreckung auf, die durch eine Längsachse L symbolisiert ist. In Schlepprichtung nach hinten schließt an das Fräsengehäuse eine Finisheranordnung 3 an, die als flexible Glätteinrichtung zur Glättung und Verdichtung der bearbeiteten Schneepistenoberfläche gestaltet ist. Die Finisheranordnung 3 ist rückseitig an dem Fräsengehäuse angeordnet. Jeder Gehäuseabschnitt 2 weist an seinen gegenüberliegenden Stirnseiten einen etwa vertikal und in Schlepprichtung erstreckten Wandungsabschluss auf, in dem jeweils eine Lagerung 8 für die drehbare Lagerung einer Fräswelle 5 vorgesehen ist. Die Lagerung 8 auf jeder Seite der Fräswelle 5 ist beim dargestellten Ausführungsbeispiel als Pendelwälzlager, insbesondere als Pendelrollenlager, ausgeführt. Die Fräswelle 5 ist als im Wesentlichen zylindrische Walze gestaltet, die an ihrem Außenmantel über die gesamte Länge der Fräswelle 5 verteilt eine Vielzahl von in Radialebenen zur Mittellängsachse der Fräswelle 5 abragenden Fräszähnen 6 trägt. Zur Mitte hin ist die Fräswelle 5 mit einem Antriebsritzel 7 versehen, an dem ein Getriebeelement einer Antriebseinheit angreift, um die Fräswelle für eine Rotation anzutreiben.The rear attachment 1 has a milling housing, which is divided into a left housing section 2 and a right housing section. Each housing section 2 is open to a substrate and has a longitudinal extent extending transversely to the direction of the towing, which is symbolized by a longitudinal axis L. Towards the rear, the finisher assembly 3 adjoins the milling housing, which is designed as a flexible smoothing device for smoothing and compacting the processed snow runway surface. The finisher assembly 3 is arranged on the back side of the milling housing. Each housing section 2 has at its opposite end faces an approximately vertical and extended in the direction of drag wall termination, in each of which a bearing 8 is provided for the rotatable mounting of a cutter shaft 5. The bearing 8 on each side of the cutter shaft 5 is executed in the illustrated embodiment as a pendulum roller bearing, in particular as spherical roller bearings. The milling shaft 5 is designed as a substantially cylindrical roller which, distributed over its outer surface over the entire length of the milling shaft 5, carries a multiplicity of milling teeth 6 projecting in radial planes relative to the central longitudinal axis of the milling shaft 5. Towards the center, the milling shaft 5 is provided with a drive pinion 7, on which a transmission element of a drive unit engages in order to drive the milling shaft for rotation.

Außenseitig ist an dem stirnseitigen Wandungsabschluss des Gehäuseabschnittes 2 ein Seitenfinisher 4 angeordnet, der seitlich neben dem Fräsengehäuse eine Glättung und Verdichtung der Pistenoberfläche ermöglicht.On the outside, a side finisher 4 is arranged on the end wall termination of the housing section 2, which allows smoothing and compression of the runway surface laterally next to the milling housing.

Die Fräswelle 5 ist relativ zu der Längsachse L des Gehäuseabschnittes 2 und damit relativ zu einer Querrichtung des Heckanbaugerätes - auf einen Fahrbetrieb bezogen - schräggestellt. Beim dargestellten Ausführungsbeispiel ist die Fräswelle 5 innerhalb einer Horizontalebene des Gehäuseabschnittes 2, vorliegend innerhalb der durch Fig. 1 definierten Zeichnungsebene, um einen Winkel zwischen 1° und 3° relativ zur Längsachse L schräggestellt. Dabei erstreckt sich die Fräswelle 5 von einer innenseitig mittigen Anordnung aus schräg nach außen und in Schlepprichtung nach vorne. Die entsprechende Kippung der Fräswelle 5 um den genannten Winkel führt zu einer Schrägstellung der Fräszähne 6. Die Schrägstellung der Fräszähne 6 ist derart gewählt, dass die Fräszähne im Schleppbetrieb der fahrenden Pistenraupe zusätzlich zur Zerkleinerung der zu bearbeitenden Schneepistenoberfläche eine Schaufelwirkung zur Seite hin erzielen. Hierdurch wird die Förderung von zu zerkleinernden Schnee- und Eismengen in das Fräsengehäuse und damit in den Gehäuseabschnitt 2 hinein verbessert.The milling shaft 5 is inclined relative to the longitudinal axis L of the housing portion 2 and thus relative to a transverse direction of the rear mounted implement - based on a driving operation. In the illustrated embodiment, the milling shaft 5 is within a horizontal plane of the housing portion 2, in this case within the Fig. 1 defined plane of drawing, inclined at an angle between 1 ° and 3 ° relative to the longitudinal axis L. In this case, the milling shaft 5 extends from an inner central arrangement of obliquely outwards and in the direction of the tow towards the front. The inclination of the cutting teeth 6 is selected such that the cutting teeth in the towing operation of the moving snow groomer in addition to crushing the snow track surface to be machined achieve a blade effect to the side. As a result, the promotion of crushing snow and ice in the milling housing and thus in the housing section 2 is improved.

Vorzugsweise sind bei dem beschriebenen Heckanbaugerät 1 die Lagerungen 8 in den stirnseitigen Wandungsabschlüssen des Gehäuseabschnittes 2 in horizontalen Längsführungen oder Langlochabschnitten des jeweiligen Wandungsabschlusses gehalten, so dass eine individuelle Einstellung und Justierung des jeweils gewünschten Winkels der Schrägstellung der Fräswelle 5 zwischen 0° und maximal 5° relativ zur Längsachse L des Gehäuseabschnittes 2 ermöglicht ist.Preferably, in the described Heckanbaugerät 1, the bearings 8 are held in the end wall terminations of the housing section 2 in horizontal longitudinal guides or slot sections of the respective Wandungsabschlusses, so that an individual adjustment and adjustment of the respective desired angle of inclination of the Fräswelle 5 between 0 ° and a maximum of 5 ° relative to the longitudinal axis L of the housing section 2 is made possible.

Eine besonders bevorzugte, nicht dargestellte Ausführungsform der Erfindung weist Stellmittel zur Veränderung des Schrägausrichtungswinkels der Fräswelle auf. Diese Stellmittel können im Stillstand der Fräse mechanisch einstellbar sein. Alternativ oder ergänzend sind den Stellmitteln elektrische, hydraulische oder pneumatische Steuermittel zugeordnet, um eine Ansteuerung der Stellmittel auch während eines Fahrbetriebes der Pistenraupe zu ermöglichen. Die Steuermittel werden vorzugsweise aus dem Cockpit der Pistenraupe gesteuert. Es ist aber auch möglich, die Steuermittel über eine elektronische Steuerung nach Kriterien zu steuern, die über eine passende Software vorgegeben werden.A particularly preferred, not shown embodiment of the invention has adjusting means for changing the oblique orientation angle of the milling shaft. These adjusting means can be mechanically adjustable at standstill of the milling cutter. Alternatively or additionally, the adjusting means are assigned electrical, hydraulic or pneumatic control means in order to enable a control of the actuating means during a driving operation of the snow groomer. The control means are preferably controlled from the cockpit of the snow groomer. But it is also possible to control the control means via an electronic control according to criteria that are specified by a suitable software.

Claims (6)

  1. Rear-mounted unit for a piste grooming vehicle having a tiller shaft arrangement comprising at least two tiller shafts provided with tiller teeth and rotatably mounted in housing sections of a tiller housing, where said tiller shafts (5) are aligned mirrorsymmetrical to one another - relative to a vertical central longitudinal plane of the rear-mounted unit,
    characterized in that
    the tiller shafts (5) are inclined relative to a housing longitudinal axis (L) of the tiller housing (2) so that an inclination of the tiller teeth (6) is achieved such that said tiller teeth (6) achieve, during towed operation by the moving piste grooming vehicle, in addition to a breaking down of the snow piste surface to be groomed a shovelling effect towards the side, whereby snow and ice lumps are conveyed by the tiller shafts into the tiller housing.
  2. Rear-mounted unit according to claim 1, characterized in that each tiller shaft (5) is inclined within a horizontal plane of the housing section (2).
  3. Rear-mounted unit according to claim 1, characterized in that the tiller shafts (5) are inclined such that during towed operation of the rear-mounted unit they extend, relative to a towed direction, obliquely rearwards from the outside towards the centre.
  4. Rear-mounted unit according to claim 1, characterized in that an angle range by which each tiller shaft (5) is inclined relative to the housing longitudinal axis (L), is between 1° and 5°.
  5. Rear-mounted unit according to one of the preceding claims, characterized in that the tiller shafts (5) are mounted inside the housing sections (2) with the aid of self-aligning anti-friction bearings.
  6. Rear-mounted unit according to at least one of the preceding claims, characterized in that the inclined tiller shafts (5) are arranged inside the tiller housing (2) such that they are positioned during towed operation of the rear-mounted unit behind a piste grooming vehicle in the area of the piste surface groomed by track running gear of the said piste grooming vehicle.
EP10014317.1A 2009-11-06 2010-11-05 Rear end construction device for a piste caterpillar Not-in-force EP2319988B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009053572.1A DE102009053572B4 (en) 2009-11-06 2009-11-06 Rear attachment for a snowcat

Publications (3)

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EP2319988A2 EP2319988A2 (en) 2011-05-11
EP2319988A3 EP2319988A3 (en) 2012-12-19
EP2319988B1 true EP2319988B1 (en) 2016-06-01

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Application Number Title Priority Date Filing Date
EP10014317.1A Not-in-force EP2319988B1 (en) 2009-11-06 2010-11-05 Rear end construction device for a piste caterpillar

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DE (1) DE102009053572B4 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013204723A1 (en) * 2013-03-18 2014-09-18 Kässbohrer Geländefahrzeug AG Milling shaft for a tail mill of a snow groomer
DE102018106962A1 (en) * 2018-03-23 2019-09-26 Engelhardt Verwaltungs- und Dienstleistungs GmbH & Co. KG Drive chain for a snow groomer and method for preparing a ski slope with a snow groomer
DE102020215706A1 (en) * 2020-12-11 2022-06-15 Kässbohrer Geländefahrzeug Aktiengesellschaft Milling shaft for a rear tiller of a snow groomer and rear tiller
DE102020215740A1 (en) 2020-12-11 2022-06-15 Kässbohrer Geländefahrzeug Aktiengesellschaft Rear tiller for a snow groomer for working snow surfaces

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH540053A (en) * 1972-01-10 1973-08-15 Ratrac Ag Drag roller
US5581914A (en) * 1995-11-21 1996-12-10 Lmc Operating Corp. Snow cutting tooth for rotating cutter bar of ski slope tiller
DE29600076U1 (en) * 1996-01-05 1996-06-05 Formex Plastik Gmbh clutch
US6810609B2 (en) * 1999-12-17 2004-11-02 Bombardier Inc. Snow groomer having an improved variable geometry tiller assembly
US20030159840A1 (en) * 2002-02-28 2003-08-28 Anthony Schmidt Power groomer for snow & earth terrain

Also Published As

Publication number Publication date
EP2319988A2 (en) 2011-05-11
DE102009053572A1 (en) 2011-05-12
EP2319988A3 (en) 2012-12-19
DE102009053572B4 (en) 2016-03-17

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