EP0493663B1 - Device for rotary snow plough - Google Patents

Device for rotary snow plough Download PDF

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Publication number
EP0493663B1
EP0493663B1 EP91118880A EP91118880A EP0493663B1 EP 0493663 B1 EP0493663 B1 EP 0493663B1 EP 91118880 A EP91118880 A EP 91118880A EP 91118880 A EP91118880 A EP 91118880A EP 0493663 B1 EP0493663 B1 EP 0493663B1
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EP
European Patent Office
Prior art keywords
snow
cutting drum
arrangement according
skids
hold
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EP91118880A
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German (de)
French (fr)
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EP0493663A1 (en
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Paul Mötteli
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Individual
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01HSTREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
    • E01H5/00Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
    • E01H5/04Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material

Definitions

  • the invention relates to a device on a snow blower according to the preamble of claim 1.
  • snow blowers do not only move forward during the milling work, but as a result of the direction of rotation of the milling drum also has the tendency to move on an ascending path - leaving a layer of snow increasing in height. This tendency is particularly noticeable in milling centrifuges whose undercarriage is formed by a single-axle tractor.
  • support weights are therefore provided as far as possible in front of the wheel axis. These make it difficult to lift the milling drum in the sense of a tilting movement about the wheel axis. However, their effect is usually not sufficient to prevent the milling drum from lifting and, for example, to enable black clearing in one pass.
  • a snow clearing device in which a sliding shoe pointing in the direction of travel is provided.
  • the sliding shoe which has an upward-facing surface, is arranged below the milling drum and keeps it at a distance from the base. This device is also unable to prevent it from gradually rising on the snow under the action of the milling drum.
  • the object of the invention is to provide an inexpensive device which allows the clearing operation with the snow blower to be carried out in a simple manner largely unaffected by the forces released during snow removal.
  • the effectiveness of the device according to the invention automatically adapts to the greatest possible extent to the snow conditions and in particular the nature. If it is dry fresh snow or the snow depth is low, the hold-down force generated is low. However, through the Milling is also only free of small, upward-acting reaction forces. On the other hand, in the case of increasing reaction forces caused by heavier snow, the greater density of the snow layer automatically opposes a greater hold-down force.
  • the device is also suitable for preventing undesired contact of the milling drum with an obstacle lying in the direction of travel.
  • the snow blower shown in FIG. 1 has a single wheel axis, indicated at 2, of a chassis 4 with two driven, tire-equipped wheels 6 and a gear box 7.
  • a milling device 8 equipped with a centrifugal device is attached to the gear box 7 in the direction of travel, and an internal combustion engine 10 against it flanged.
  • a steering fork 12 ends behind the internal combustion engine 10 is rigidly connected to the gear box 7.
  • control elements attached to the steering fork for the motor 10 and the milling device 8 are indicated.
  • the chassis 4 forms, together with the gearbox 7 and the motor 10, a single-axle tractor. In principle, this could also be designed as a multi-axle vehicle.
  • the milling device 8 has a cylindrical milling drum 20, the axis of rotation 22 (FIG. 2) of which runs parallel to the wheel axis 2 and is mounted in a housing 24.
  • the milling device 8 comprises a shield part 26 and an ejection channel 28.
  • the snow blower is equipped with a device which includes hold-down elements in the form of sliding shoes 30.
  • One elongated slide shoe 30 is attached to both of the lower side edges of the housing 24 via a connector 32 belonging to the slide shoe and extends in the direction of travel.
  • the sliding shoes 30 extend with their sliding surface 34 approximately tangentially to the wheels 6.
  • the length of the connecting piece 32 is selected such that the milling drum 20 remains raised by a small distance from this floor surface when the sliding surface 34 lies on a flat bottom surface 42.
  • the sliding shoes 30 running parallel to one another, viewed in plan, are located laterally outside the working area of the milling drum 20 most essential part of its longitudinal extent flat upper sides 38.
  • the front ends 40 of the sliding shoes 30 are wedge-shaped and in such a way that the upper sides 38 run downwards.
  • the tops 38 form retention surfaces.
  • the milling drum 20 rotates clockwise with respect to the illustration according to FIG. 1 in order to feed the milled snow to the centrifugal unit, not shown, and to convey it away through the ejection channel.
  • the reaction force resulting from this direction of rotation during the milling work accordingly points upwards and, based on the wheel axis 2, results in a tilting moment which the milling device 8 and thus the milling drum 20 endeavors to raise.
  • the size of the reaction force depends on the snow conditions.
  • the hold-down elements according to the invention help to avoid undesired contact of the milling drum 20 with obstacles present in front of or to the side of the same.
  • the connecting pieces 32 also have a double function in that, in addition to the fastening of the sliding shoes 30, they also serve as safety signs which prevent accidental approach to the milling drum. For a quiet ride in clearing operations, i.e. In the case of sliding shoes resting on the floor, it is advantageous that these result in an increased guide length due to the distance of the front ends 40 from the wheel axle 2.
  • the hold-down members can also have a shape or arrangement other than that described and shown in the drawing.
  • the device can also be formed by a single hold-down device.
  • 3 shows the design of such a hold-down member in the plan.
  • the hold-down element is also designed as a sliding shoe and is designated by 50.
  • Two connecting pieces 32 ' are connected in a manner corresponding to the arrangement according to FIG. 1 with the chassis of a tractor, not shown here.
  • A extends with the two connecting pieces 32 ' rigidly connected blade body 52 which runs transversely to the forward direction of travel indicated by the arrow V.
  • the blade body 52 On its front side 54, the blade body 52 is covered with tines 56 over most of its extent.
  • the front side 54 ends in curves 58, which in turn run out against the connecting pieces 32 ′.
  • the forwardly directed prongs 56 are designed like saw teeth.
  • the blade body 52 tapers towards the front 54 in a cutting shape.
  • the top 60 and the underside of the blade body 52 are formed by flat surfaces, the latter extending approximately parallel to the base over its transverse extent and extending approximately tangentially to the circumference of the chassis wheels, not shown here.
  • another tough metallic or non-metallic material can also be suitable as material for the sliding shoe 50.
  • the hold-down element shown in FIG. 3 basically acts in the same way as the hold-down elements according to FIGS. 1 and 2, the upper side 60 of which forms the retention surface. However, thanks to its transverse extension, this hold-down element also has a cutting effect across the entire width of the milling drum. The cutting action is supported by the teeth 56. Accordingly, snow remnants can be found in areas in front of the milling drum that cannot be detected by it, e.g. in front of walls, excavate and remove. Thanks to the cutting-like profile, there is little resistance when moving forward.
  • the blade body 52 can also be formed by a flat plate made of sheet steel, for example. This can be inclined slightly downwards forwards and it may be advisable to provide the underside with a slide bar, which runs in the continuation of the connecting pieces 32 'and is several millimeters thick (not shown).

Abstract

The rotary snow plough, which has a chassis (4) and an engine (10), has a housing (24) for the cutting drum (20). Two hold-down members designed as skids (30) are mounted on this at ground level. <??>At their front ends (40), which lie in front of the cutting drum in the direction of travel, the skids are of wedge-shaped design. When the skids penetrate into the snow during the clearing work, a downward force component arises at the skids due to the wedge shape. This counteracts the tendency of the rotary snow plough to climb up onto the snow. The hold-down members accordingly maintain contact with the ground and ensure that the snow is cleared uniformly and close to the ground. <IMAGE>

Description

Die Erfindung betrifft eine Einrichtung an einer Schneefrässchleuder nach dem Oberbegriff von Anspruch 1.The invention relates to a device on a snow blower according to the preamble of claim 1.

Bei Schneefrässchleudern besteht grundsätzlich das Problem, dass diese bei der Fräsarbeit sich nicht nur vorwärts bewegt, sondern als Folge der Drehrichtung der Frästrommel auch die Tendenz hat, sich auf einer - eine Schneeschicht zunehmender Höhe zurücklassenden - aufsteigenden Bahn fortzubewegen. Bei Frässchleudern, deren Fahrwerk durch einen Einachstraktor gebildet ist, macht sich diese Tendenz besonders stark bemerkbar. Bei einer bekannten Schneefrässchleuder dieser Art sind deshalb möglichst weit vor der Radachse angeordnete Auflagegewichte vorgesehen. Diese erschweren zwar das Anheben der Frästrommel im Sinne einer Kippbewegung um die Radachse. Jedoch ist deren Wirkung meist nicht ausreichend, um das Anheben der Frästrommel zu verhindern und z.B ein Schwarzräumen in einem Durchgang zu ermöglichen.The basic problem with snow blowers is that they do not only move forward during the milling work, but as a result of the direction of rotation of the milling drum also has the tendency to move on an ascending path - leaving a layer of snow increasing in height. This tendency is particularly noticeable in milling centrifuges whose undercarriage is formed by a single-axle tractor. In a known snow blower of this type, support weights are therefore provided as far as possible in front of the wheel axis. These make it difficult to lift the milling drum in the sense of a tilting movement about the wheel axis. However, their effect is usually not sufficient to prevent the milling drum from lifting and, for example, to enable black clearing in one pass.

Aus US-A-2,426,507 und US-A-3 395 466 ist eine Schneeräumeinrichtung bekannt, bei welcher ein in Fahrtrichtung weisender Gleitschuh vorgesehen ist. Der eine nach aufwärts gerichtete Fläche aufweisende Gleitschuh ist unterhalb der Frästrommel angeordnet und hält diese in Abstand von der Unterlage. Diese Einrichtung ist ebenfalls nicht in der Lage, ein allmähliches Aufsteigen derselben auf dem Schnee unter der Einwirkung der Frästrommel zu verhindern.From US-A-2,426,507 and US-A-3 395 466 a snow clearing device is known, in which a sliding shoe pointing in the direction of travel is provided. The sliding shoe, which has an upward-facing surface, is arranged below the milling drum and keeps it at a distance from the base. This device is also unable to prevent it from gradually rising on the snow under the action of the milling drum.

Aufgabe der Erfindung ist die Schaffung einer kostengünstigen Einrichtung, die in einfacher Weise gestattet, den Räumvorgang mit der Schneefrässchleuder weitgehend unbeeinflusst von den beim Schneeräumen freiwerdenden Kräften durchzuführen.The object of the invention is to provide an inexpensive device which allows the clearing operation with the snow blower to be carried out in a simple manner largely unaffected by the forces released during snow removal.

Die Lösung dieser Aufgabe gelingt mit den Merkmalen des Anspruchs 1.This object is achieved with the features of claim 1.

Die Wirksamkeit der erfindungsgemässen Einrichtung passt sich den Schneeverhältnissen und insbesondere der Beschaffenheit selbsttätig in weitestgehendem Ausmass an. Handelt es sich um trockenen Neuschnee oder ist die Schneehöhe gering, so ist die erzeugte Niederhaltekraft klein. Jedoch werden durch die Fräsbearbeitung ebenfalls nur kleine, nach aufwärts wirkende Reaktionskräfte frei. Hingegen stellt sich den bei durch schwereren Schnee verursachten grösser werdenden Reaktionskräften aus der grösseren Dichte der Schneeschicht automatisch eine grössere Niederhaltekraft entgegen.The effectiveness of the device according to the invention automatically adapts to the greatest possible extent to the snow conditions and in particular the nature. If it is dry fresh snow or the snow depth is low, the hold-down force generated is low. However, through the Milling is also only free of small, upward-acting reaction forces. On the other hand, in the case of increasing reaction forces caused by heavier snow, the greater density of the snow layer automatically opposes a greater hold-down force.

Die Einrichtung ist darüberhinaus geeignet, einen unerwünschten Kontakt der Frästrommel mit einem in Fahrtrichtung liegenden Hindernis zu vermeiden.The device is also suitable for preventing undesired contact of the milling drum with an obstacle lying in the direction of travel.

Nachfolgend sind zwei beispielsweise Ausführungsformen der erfindungsgemässen Einrichtung an Hand der Zeichnung erläutert. Es zeigen:

Fig. 1
schematisch in Seitenansicht eine die Einrichtung nach der Erfindung aufweisende Schneefrässchleuder, in der ersten Ausführungsform;
Fig. 2
im Grundriss die Lage der Gleitschuhe relativ zur Frästrommel der Schneefrässchleuder nach Fig. 1 in vergrössertem Masstab dargestellt, wobei die anderen Teile der Frässchleuder weggelassen sind und
Fig. 3
ebenfalls im Grundriss die zweite Ausführungsform der erfindungsgemässen Einrichtung.
Two exemplary embodiments of the device according to the invention are explained below with reference to the drawing. Show it:
Fig. 1
schematically in side view a snow blower having the device according to the invention, in the first embodiment;
Fig. 2
the floor plan shows the position of the sliding shoes relative to the milling drum of the snow blower according to FIG. 1 on an enlarged scale, the other parts of the milling blower being omitted and
Fig. 3
likewise in plan the second embodiment of the device according to the invention.

Die in Fig. 1 dargestellte Schneefrässchleuder besitzt eine einzige, bei 2 angedeutete Radachse eines Fahrwerkes 4 mit zwei angetriebenen, pneubereiften Rädern 6 sowie einen Getriebekasten 7. Am Getriebekasten 7 ist in Fahrtrichtung ein mit einer Schleudereinrichtung ausgestattetes Fräsgerät 8 angebaut sowie entgegen dieser ein Verbrennungsmotor 10 angeflanscht. Hinter dem Verbrennungsmotor 10 endet eine Lenkgabel 12, die starr mit dem Getriebekasten 7 verbunden ist. Bei 14 sind an der Lenkgabel angebrachte Bedienungsorgane für den Motor 10 und das Fräsgerät 8 angedeutet.The snow blower shown in FIG. 1 has a single wheel axis, indicated at 2, of a chassis 4 with two driven, tire-equipped wheels 6 and a gear box 7. A milling device 8 equipped with a centrifugal device is attached to the gear box 7 in the direction of travel, and an internal combustion engine 10 against it flanged. A steering fork 12 ends behind the internal combustion engine 10 is rigidly connected to the gear box 7. At 14, control elements attached to the steering fork for the motor 10 and the milling device 8 are indicated.

Das Fahrwerk 4 bildet zusammen mit dem Getriebekasten 7 und dem Motor 10 einen einachsigen Traktor. Dieser könnte grundsätzlich auch als mehrachsiges Fahrzeug ausgebildet sein.The chassis 4 forms, together with the gearbox 7 and the motor 10, a single-axle tractor. In principle, this could also be designed as a multi-axle vehicle.

Das Fräsgerät 8 besitzt eine zylindrische Frästrommel 20, deren Rotationsachse 22 (Fig. 2) parallel zur Radachse 2 verläuft und in einem Gehäuse 24 gelagert ist. Darüber hinaus umfasst das Fräsgerät 8 einen Schildteil 26 sowie einen Auswurfkanal 28.The milling device 8 has a cylindrical milling drum 20, the axis of rotation 22 (FIG. 2) of which runs parallel to the wheel axis 2 and is mounted in a housing 24. In addition, the milling device 8 comprises a shield part 26 and an ejection channel 28.

Erfindungsgemäss ist die Schneefrässchleuder mit einer Einrichtung ausgestattet, die Niederhalteorgane in der Form von Gleitschuhen 30 umfassen. Je ein länglicher Gleitschuh 30 ist an beiden der unteren Seitenränder des Gehäuses 24 über ein dem Gleitschuh zugehöriges Verbindungsstück 32 in Fahrtrichtung verlaufend befestigt. Die Gleitschuhe 30 erstrecken sich mit ihrer Gleitfläche 34 etwa tangential zu den Rädern 6. Dabei ist die Länge des Verbindungsstückes 32 so gewählt, dass die Frästrommel 20 bei auf einer ebenen Bodenfläche 42 aufliegenden Gleitfläche 34 um einen geringen Abstand von dieser Bodenfläche abgehoben bleibt. Wie sich weiter aus Fig. 2. ergibt, befinden sich die parallel zueinander verlaufenden Gleitschuhe 30 im Grundriss betrachtet seitlich ausserhalb des Arbeitsbereiches der Frästrommel 20. Die Gleitschuhe 30 ragen in Fahrtrichtung um das Mass 36 über den Wirkungsbereich der Frästrommel 20 hinaus und besitzen über den wesentlichsten Teil ihrer Längserstreckung flache Oberseiten 38. Die vorderen Enden 40 der Gleitschuhe 30 sind keilförmig ausgebildet und zwar so, dass die Oberseiten 38 nach abwärts auslaufen. Die Oberseiten 38 bilden Rückhalteflächen.According to the invention, the snow blower is equipped with a device which includes hold-down elements in the form of sliding shoes 30. One elongated slide shoe 30 is attached to both of the lower side edges of the housing 24 via a connector 32 belonging to the slide shoe and extends in the direction of travel. The sliding shoes 30 extend with their sliding surface 34 approximately tangentially to the wheels 6. The length of the connecting piece 32 is selected such that the milling drum 20 remains raised by a small distance from this floor surface when the sliding surface 34 lies on a flat bottom surface 42. As can further be seen from FIG. 2, the sliding shoes 30 running parallel to one another, viewed in plan, are located laterally outside the working area of the milling drum 20 most essential part of its longitudinal extent flat upper sides 38. The front ends 40 of the sliding shoes 30 are wedge-shaped and in such a way that the upper sides 38 run downwards. The tops 38 form retention surfaces.

Im Betrieb der Schneefrässchleuder dreht sich die Frästrommel 20 bezogen auf die Darstellung nach Fig. 1 im Uhrzeigersinn, um den abgefrästen Schnee dem nicht dargestellten Schleuderaggregat zuzuführen und durch den Auswurfkanal wegzubefördern. Die aus dieser Drehrichtung bei der Fräsarbeit resultierende Reaktionskraft weist demnach aufwärts und hat, bezogen auf die Radachse 2 ein Kippmoment zur Folge, das das Fräsgerät 8 und damit die Frästrommel 20 anzuheben bestrebt ist. Die Grösse der Reaktionskraft ist von der Schneebeschaffenheit abhängig.When the snow blower is operating, the milling drum 20 rotates clockwise with respect to the illustration according to FIG. 1 in order to feed the milled snow to the centrifugal unit, not shown, and to convey it away through the ejection channel. The reaction force resulting from this direction of rotation during the milling work accordingly points upwards and, based on the wheel axis 2, results in a tilting moment which the milling device 8 and thus the milling drum 20 endeavors to raise. The size of the reaction force depends on the snow conditions.

Der Folge dieser resultierenden Reaktionskraft wirkt nun die Einrichtung gemäss der Erfindung unter Nutzbarmachung des zu räumenden Schnees entgegen. Der über den Niederhalteorganen liegende Schnee stellt sich einer Aufwärtsbewegung derselben im Ausmass der zu leistenden Verdrängungsarbeit entgegen. Die ist einerseits durch die Grösse und Form der Rückhalteflächen, gebildet durch die Oberseiten 38 der Gleitschuhe 30 und anderseits ebenfalls durch die Schneebeschaffenheit bestimmt. Die Wirksamkeit der Gleitschuhe 30 ist deshalb um so grösser, je weiter diese mit ihren Rückhalteflächen aus dem Wirkungsbereich der Frästrommel 20 in eine noch intakte Schneeschicht herausragen. Mit deren Ueberstand nach vorn, d.h. in der Räumrichtung ist die wirksamste Anordnung gegeben. Dank der keilförmigen Ausgestaltung der vorderen Enden 40 wirkt an den Gleitschuhen bei der Räumarbeit, d.h. Vorwärtsbewegung der Schneefrässchleuder eine nach abwärts gerichtete Kraftkomponente, die der Neigung, auf den am Boden 42 haftenden Schnee aufzufahren, entgegenwirkt.The result of this resulting reaction force is now counteracted by the device according to the invention, making use of the snow to be cleared. The snow lying over the hold-down elements opposes an upward movement thereof in the extent of the displacement work to be performed. This is determined, on the one hand, by the size and shape of the retention surfaces, formed by the upper sides 38 of the sliding shoes 30, and, on the other hand, also by the snow conditions. The effectiveness of the sliding shoes 30 is therefore greater, the further they protrude with their retaining surfaces from the effective area of the milling drum 20 into a still intact layer of snow. With their protrusion forward, i.e. the most effective arrangement is given in the clearing direction. Thanks to the wedge-shaped design of the front ends 40, the sliding shoes act during clearing work, i.e. Forward movement of the snow blower has a downward force component that counteracts the tendency to hit the snow adhering to the ground 42.

Aus dem Vorstehenden ergibt sich, dass die von den Rückhalteflächen der Gleitschuhe entfaltete Wirkung umso grösser ist, je grösser die aus der Schneemenge und -Beschaffenheit entstehende, nach aufwärts gerichtete Reaktionskraft der Räumbearbeitung durch die Frästrommel ist. Bei entsprechender Auslegung enstehen deshalb keine unnötigen Reibungskräfte auf dem Boden bei Schwarzräumung und keine unerwünschte Eingrabtendenz, wenn auf einer Schneedecke geräumt werden soll.It follows from the foregoing that the greater the effect of the amount and type of snow, the greater the effect developed by the retaining surfaces of the sliding shoes arising, upward reaction force of broaching by the milling drum. With an appropriate design, there are therefore no unnecessary frictional forces on the floor when clearing black and no undesirable tendency to dig in when clearing on a blanket of snow.

Die erfindungsgemässen Niederhalteorgane tragen dazu bei, einen unerwünschten Kontakt der Frästrommel 20 mit vor oder seitlich derselben vorhandenen Hindernissen zu vermeiden. Auch die Verbindungsstücke 32 haben eine Doppelfunktion, indem sie neben der Befestigung der Gleitschuhe 30 auch als Sicherheitsschilder dienen, die eine unbeabsichtigte Annäherung an die Frästrommel verhindern. Für eine ruhige Fahrt im Räumbetrieb, d.h. bei auf dem Boden aufliegenden Gleitschuhen ist von Vorteil, dass diese infolge des Abstandes der vorderen Enden 40 von der Radachse 2 eine vergrösserte Führungslänge ergeben.The hold-down elements according to the invention help to avoid undesired contact of the milling drum 20 with obstacles present in front of or to the side of the same. The connecting pieces 32 also have a double function in that, in addition to the fastening of the sliding shoes 30, they also serve as safety signs which prevent accidental approach to the milling drum. For a quiet ride in clearing operations, i.e. In the case of sliding shoes resting on the floor, it is advantageous that these result in an increased guide length due to the distance of the front ends 40 from the wheel axle 2.

Die Niederhalteorgane können auch eine andere als die beschriebene und in der Zeichnung dargestellte Form oder Anordnung haben. Insbesondere ist denkbar, dass diese in den vor der Frästrommel liegenden Teilen gegeneinander d.h. nach einwärts bogenförmig verlaufen und damit das Manöverieren an Hindernissen vorbei erleichtern.The hold-down members can also have a shape or arrangement other than that described and shown in the drawing. In particular, it is conceivable that in the parts lying in front of the milling drum, run inward in an arc shape, making it easier to maneuver past obstacles.

Es versteht sich, dass die Einrichtung auch durch nur ein einziges Niederhalteorgan gebildet sein kann. In der Fig. 3 ist im Grundriss die Ausgestaltung eines solchen Niederhalteorganes dargestellt. In diesem Ausführungsbeispiel ist das Niederhalteorgan ebenfalls als Gleitschuh ausgebildet und mit 50 bezeichnet. Zwei Verbindungsstücke 32' sind in einer der Anordnung nach Fig.1 entsprechenden Weise mit dem hier nicht dargestellten Fahrwerk eines Traktors verbunden. Zwischen den beiden Verbindungsstücken 32' erstreckt sich ein mit diesen starr verbundener, quer zu der durch den Pfeil V angedeuteten Vorwärts-Fahrrichtung verlaufender Blattkörper 52. An dessen Vorderseite 54 ist der Blattkörper 52 über den grössten Teil seiner Erstreckung mit Zacken 56 besetzt. Beidseits der Zacken 56 endet die Vorderseite 54 in Rundungen 58, die ihrerseits gegen die Verbindungsstücke 32' hin auslaufen. Die nach vorwärts gerichteten Zacken 56 sind sägezahnartig ausgestaltet. Im Profil verjüngt sich der Blattkörper 52 schneidenförmig gegen die Vorderseite 54 hin. Die Oberseite 60 und die Unterseite des Blattkörpers 52 sind durch ebene Flächen gebildet, wobei die letztere über dessen Quererstreckung etwa parallel zur Unterlage verläuft und sich etwa tangential zum Umfang der hier nicht dargestellten Fahrwerksräder erstreckt. Für den Gleitschuh 50 kann sich neben Stahl auch ein anderes zähes metallisches oder nicht-metallisches Material als Werkstoff eignen.It is understood that the device can also be formed by a single hold-down device. 3 shows the design of such a hold-down member in the plan. In this exemplary embodiment, the hold-down element is also designed as a sliding shoe and is designated by 50. Two connecting pieces 32 'are connected in a manner corresponding to the arrangement according to FIG. 1 with the chassis of a tractor, not shown here. A extends with the two connecting pieces 32 ' rigidly connected blade body 52 which runs transversely to the forward direction of travel indicated by the arrow V. On its front side 54, the blade body 52 is covered with tines 56 over most of its extent. On both sides of the prongs 56, the front side 54 ends in curves 58, which in turn run out against the connecting pieces 32 ′. The forwardly directed prongs 56 are designed like saw teeth. In profile, the blade body 52 tapers towards the front 54 in a cutting shape. The top 60 and the underside of the blade body 52 are formed by flat surfaces, the latter extending approximately parallel to the base over its transverse extent and extending approximately tangentially to the circumference of the chassis wheels, not shown here. In addition to steel, another tough metallic or non-metallic material can also be suitable as material for the sliding shoe 50.

Das in Fig. 3 dargestellte Niederhalteorgan wirkt grundsätzlich gleich wie die Niederhalteorgane nach Fig. 1 und 2, wobei dessen Oberseite 60 die Rückhaltefläche bildet. Jedoch bringt dieses Niederhalteorgan dank seiner Quererstreckung zusätzlich eine Schneidwirkung über die ganze Breite der Frästrommel. Die Schneidwirkung wird dabei von den Zacken 56 unterstützt. Es lassen sich demnach Schneereste in vor der Frässtrommel liegenden und von dieser nicht erfassbaren Bereichen, z.B. vor Mauern, ausheben und wegfördern. Dank schneidenförmiger Profilierung ergibt sich bei der Vorwärtsbewegung ein geringer Widerstand.The hold-down element shown in FIG. 3 basically acts in the same way as the hold-down elements according to FIGS. 1 and 2, the upper side 60 of which forms the retention surface. However, thanks to its transverse extension, this hold-down element also has a cutting effect across the entire width of the milling drum. The cutting action is supported by the teeth 56. Accordingly, snow remnants can be found in areas in front of the milling drum that cannot be detected by it, e.g. in front of walls, excavate and remove. Thanks to the cutting-like profile, there is little resistance when moving forward.

Der Blattkörper 52 kann auch durch eine ebene Platte z.B. aus Stahlblech gebildet sein. Diese kann nach vorwärts leicht abwärts geneigt sein und es ist unter Umständen zweckmässig, die Unterseite mit je einer in der Fortsetzung der Verbindungsstücke 32' verlaufenden, einige Millimeter dicken Gleitleiste zu versehen (nicht dargestellt).The blade body 52 can also be formed by a flat plate made of sheet steel, for example. This can be inclined slightly downwards forwards and it may be advisable to provide the underside with a slide bar, which runs in the continuation of the connecting pieces 32 'and is several millimeters thick (not shown).

Claims (6)

  1. An arrangement on rotary snow ploughs, with a cutting drum (20), running gear (4), a motorised drive and, connected to the running gear (4) and disposed in the region of the cutting drum, at least one sliding shoe (30, 50) pointing in the direction of clearance, for movement on the underlying surface (42) and having an upwardly directed surface (38, 60), characterised in that the sliding shoe (30, 50) is constructed as a depressing means which in the direction of clearance (V) extends farther forwards than the cutting drum (20) to counteract the tendency of the rotary snow plough to move forwards on a rising path, leaving behind a layer of snow of increasing height.
  2. An arrangement according to Claim 1, characterised in that extending substantially in the direction of travel there are two elongated sliding shoes (30) which are fixed laterally of the cutting drum (20) and extend substantially tangentially in relation to the periphery of the wheels (6).
  3. An arrangement according to one of the preceding Claims, characterised in that the front ends of the sliding shoes (30) are of wedge-shaped construction.
  4. An arrangement according to Claim 2 or 3, characterised in that the sliding shoes (30) are curved inwardly towards each other in front of the cutting drum (20).
  5. An arrangement according to Claim 1, characterised in that the sliding shoe (50) comprises a blade member (52) which extends over the width of the cutting drum.
  6. An arrangement according to Claim 5, characterised in that the blade member (52) has forwardly directed tines (56).
EP91118880A 1990-12-06 1991-11-06 Device for rotary snow plough Expired - Lifetime EP0493663B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH386390 1990-12-06
CH3863/90 1990-12-06

Publications (2)

Publication Number Publication Date
EP0493663A1 EP0493663A1 (en) 1992-07-08
EP0493663B1 true EP0493663B1 (en) 1994-10-26

Family

ID=4265099

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Application Number Title Priority Date Filing Date
EP91118880A Expired - Lifetime EP0493663B1 (en) 1990-12-06 1991-11-06 Device for rotary snow plough

Country Status (7)

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US (1) US5203102A (en)
EP (1) EP0493663B1 (en)
JP (2) JPH04289307A (en)
AT (1) ATE113327T1 (en)
CA (1) CA2057091C (en)
DE (1) DE59103356D1 (en)
ES (1) ES2062643T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003041545A (en) * 2001-07-30 2003-02-13 Yamaha Motor Co Ltd Snow plow
US20100236106A1 (en) * 2009-03-22 2010-09-23 Joseph Muscarella Snowblower Attachment
WO2012094320A2 (en) * 2011-01-04 2012-07-12 Briggs & Stratton Corporation Two stage snow thrower
CN106368151B (en) * 2016-08-29 2017-12-08 赣州研顺飞科技有限公司 A kind of highway cleans fine sand device with Labor-saving

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566023A (en) *
US1701787A (en) * 1927-04-22 1929-02-12 Messlin Louis Snowplow
CH186774A (en) * 1935-11-23 1936-10-15 Peter Ag Konrad Snow blower.
US2166667A (en) * 1938-03-28 1939-07-18 Bert R Watkins Rotary snow plow
US2426507A (en) * 1945-03-23 1947-08-26 Inksetter Robert James Snow removal apparatus
US2785482A (en) * 1949-05-19 1957-03-19 Croce Karl Rotary type snow removal device
US2777217A (en) * 1951-01-05 1957-01-15 Walter E Klauer Snow removing apparatus
US3395466A (en) * 1965-06-28 1968-08-06 Klapprodt Glen Snow thrower
US3512279A (en) * 1965-09-24 1970-05-19 Toro Mfg Corp Powered tool
US4188738A (en) * 1978-07-05 1980-02-19 Vohl Paul Eugene Endless screw propeller unit for a snow thrower
JPS6332009A (en) * 1986-07-23 1988-02-10 三菱重工業株式会社 Snow removing apparatus

Also Published As

Publication number Publication date
ATE113327T1 (en) 1994-11-15
CA2057091C (en) 1995-10-24
US5203102A (en) 1993-04-20
JPH0744765U (en) 1995-11-28
JPH04289307A (en) 1992-10-14
CA2057091A1 (en) 1992-06-07
ES2062643T3 (en) 1994-12-16
JP2533576Y2 (en) 1997-04-23
DE59103356D1 (en) 1994-12-01
EP0493663A1 (en) 1992-07-08

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