EP4242378A1 - Milling shaft for snow tiller, in particular rear tiller of snow tiller - Google Patents
Milling shaft for snow tiller, in particular rear tiller of snow tiller Download PDFInfo
- Publication number
- EP4242378A1 EP4242378A1 EP23158113.3A EP23158113A EP4242378A1 EP 4242378 A1 EP4242378 A1 EP 4242378A1 EP 23158113 A EP23158113 A EP 23158113A EP 4242378 A1 EP4242378 A1 EP 4242378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- milling
- tooth
- shaft
- rotation
- cutting tip
- 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.)
- Pending
Links
- 238000003801 milling Methods 0.000 title claims abstract description 87
- 238000005520 cutting process Methods 0.000 claims abstract description 81
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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 cutter shaft for a snow blower, in particular a rear cutter of a snow groomer, with a plurality of cutter teeth arranged distributed over a circumference of a shaft shell of the cutter shaft, each cutter tooth being provided with two tooth humps spaced apart from one another in the direction of rotation of the cutter shaft.
- the invention also relates to a rear cutter for a snow groomer with such a cutter shaft and a snow groomer with such a rear cutter.
- Such a cutter shaft for a rear cutter of a snow groomer is from the DE 10 2013 204 723 A1 known.
- the known milling shaft is rotatably mounted in a rear milling machine of the snow groomer and has a shaft casing on which a large number of milling teeth are arranged distributed over its circumference and length.
- Each milling tooth is provided with two tooth cusps, each of which is part of a tooth head.
- Each tooth head is supported by two support webs on the shaft surface of the milling shaft.
- the two support webs are arranged axially offset from one another when viewed in the longitudinal direction of the milling shaft and have front flanks, each of which is provided with a cutting function.
- the object of the invention is to create a milling shaft, a rear milling machine and a snow groomer of the type mentioned at the outset, which enable the achievement of a fine-grained processed snow surface.
- each tooth hump is provided with a cutting tip, the two cutting tips of each milling tooth in the direction of rotation relative to an axis of rotation of the milling shaft by a circumferential angle from a range between 20 ° and 40 °, preferably by 30 ° , are arranged offset from one another, and that a front cutting tip, viewed radially, has a distance to the shaft shell that is at least 5 mm smaller than the rear cutting tip of each milling tooth.
- the milling shaft according to the invention enables particularly fine-grained shredding of chunks of snow and ice.
- the milling shaft according to the invention is preferably used in a rear milling machine of a snow groomer.
- the milling work is evenly distributed between the two cutting tips of each milling tooth during operation of the milling shaft.
- the height difference between the front and the back Cutting tip is preferably between 5 mm and 10 mm.
- a particularly advantageous milling tooth geometry provides for a height difference of 7.5 mm.
- the two cutting tips of each milling tooth are also spaced apart from one another in the circumferential direction, ie in the direction of rotation of the milling shaft, over a relatively large circumferential angle, which is selected from a range between 20° and 40°.
- the circumferential angle ie the angle of rotation between two radials to the axis of rotation of the milling shaft, which each touch a front tip of the respective cutting tip, is 30°.
- the relatively large distance in the direction of rotation between the two cutting tips of the two tooth cusps of each milling tooth enables the rear cutting tip of the rear tooth cusps to have already covered a sufficient circumferential path during rotation of the milling shaft before it comes to a snow that has already been processed by the respective front cutting tip. or hits chunks of ice.
- the chunk of snow or ice that has already been processed by the front cutting tip is further shredded by the rear cutting tip of each milling tooth.
- the preferred height difference between the lower front cutting tip and the higher rear cutting tip of each milling tooth of at least 5 mm is based on a usual machining depth of a milling shaft of a rear milling machine of a snow groomer of approximately 20 mm. This achieves an at least largely uniform distribution of the milling work on each front and rear cutting tip of each milling tooth.
- the combination of the features described results in a double cutting or separating function for each cutter tooth for corresponding chunks of snow or ice.
- the provision of cutting edges in the area of the cutting tips enables cutting and cutting functions at a greater radial distance from the shaft shell than in the previously described prior art.
- the milling shaft therefore enables good snow surface processing at a lower processing depth than in the prior art, which has cutting edges in the area of the support webs below the tooth cusps.
- both cutting tips each have a front cutting edge, which is inclined forward in the direction of rotation by an angle of at least 20 ° relative to a radial cutting the axis of rotation of the milling shaft.
- both the front cutting tip and the rear cutting tip are each provided with a front cutting edge in the direction of rotation, which are each inclined forward in the direction of rotation relative to a corresponding radial. This results in a steep angle of the cutting edges in the direction of rotation, which results in a real, knife-like cutting effect for each cutting edge of each of the two cutting tips of each milling tooth.
- the front cutting edge of the front cutting tip is inclined forward at a smaller angle relative to the radial intersecting the axis of rotation than the front cutting edge of the rear cutting tip relative to the corresponding radial.
- a front cutting edge of the cutting tip of the rear tooth cusp is aligned steeper than the front cutting edge of the cutting tip of the front tooth cusp.
- both cutting tips of each milling tooth are supported by a common tooth base, which is firmly connected to the shaft shell, the tooth base having a continuous support web on the shaft shell over an entire length of the milling tooth - viewed in the direction of rotation.
- the milling teeth are preferably made of a steel alloy and welded to a surface of the shaft shell. Both the tooth base and the two tooth cusps with their cutting tips are aligned in one plane with respect to one another, so that a plate-shaped component results for the respective milling tooth, which is preferably produced by punching and then grinding the cutting edges.
- the tooth base has at least one recess positioned radially above the support web.
- the recess serves to reduce weight. Since this is formed radially above the continuous lower edge of the tooth base, i.e. the continuous support web, in the respective milling tooth, the stability of the connection of the milling tooth to the shaft shell is not affected by this recess.
- the recess is preferably achieved by a suitable punching in the plate-shaped component of the milling tooth.
- a snow groomer P according to Fig. 1 is intended for the maintenance and design of snow terrain, especially in a ski area.
- the snow groomer P is provided at the rear with a rear equipment carrier, on which a rear tiller HF is detachably arranged and is also hydraulically connected to a working hydraulic system of the snow groomer P.
- the rear milling machine HF is provided with at least one milling shaft 1, on the cylindrical shaft shell of which a large number of milling teeth 3 are arranged distributed in the direction of rotation and in the longitudinal direction of the milling shaft 1.
- the milling teeth 3 are firmly connected to a surface of the shaft shell 2 of the milling shaft 1.
- the milling teeth 3 are made of a steel alloy and are materially connected to the surface of the shaft shell 2 by welding. All milling teeth 3 are designed identically to one another as plate-shaped and one-piece bodies which are aligned parallel to one another in radial planes to an axis of rotation D of the milling shaft 1. Each milling tooth 3 has - seen in the direction of rotation R - a front tooth cusps 5 and a rear tooth cusps 6 spaced apart in the direction of rotation. Based on Fig. 3 the direction of rotation R is shown in relation to a direction of travel F of the snow groomer P, which corresponds to a towing direction of the rear tiller HF.
- the two tooth cusps 5 and 6 are supported by a tooth base 4, which is together with the Tooth cusps 5 and 6 form a one-piece, plate-shaped body and are provided with a support web 7 towards the shaft shell 2.
- both the front tooth cusp 5 and the rear tooth cusp 6 are each provided with a cutting tip that is curved forward in the direction of rotation R.
- the front cutting tip of the front tooth cusp 5 is positioned at a smaller radial distance from a surface of the shaft shell 2 of the milling shaft 1 than the cutting tip of the rear tooth cusp 6.
- Corresponding partial circle lines T 1 and T 2 which are connected to the front cutting tip and to the rear cutting tip, respectively are created, show a corresponding height difference A ( Fig. 4 ). This height difference A is 7.5 mm in the exemplary embodiment shown.
- a snow surface S is indicated and a processing depth of each milling tooth 3 is shown with the rear milling machine HF in milling mode. It is clearly visible that the front cutting tip of the front tooth cusp 5 is already immersed in the snow surface S via the pitch circle line T1 . It can also be seen that the rear cutting tip of the rear tooth cusp 6, which is 7.5 mm deeper, causes an additional partial circle line T 2 that goes deeper into the snow surface S.
- a front tip of the cutting tip of the front tooth cusp 5 is offset by an angle ⁇ in the direction of rotation to a front tip of the cutting tip of the rear tooth cusp 6.
- This circumferential angle ⁇ is 30 ° in the illustrated embodiment. In other embodiments of the invention, this circumferential angle ⁇ is between 20° and 40°.
- the circumferential angle ⁇ is illustrated by a first radial Rd 1 , which is applied to the front tip of the cutting tip of the front tooth cusp 5 and intersects the axis of rotation D of the milling shaft 1, and by a further radial Rd 2 , which also intersects the axis of rotation D and to which Front tip of the rear cutting tip of the rear tooth cusp 6 is applied.
- both cutting tips of the front tooth cusp 5 and the rear tooth cusp 6 are curved forward in the direction of rotation. Both cutting tips each have a front cutting edge 9, 10.
- a front cutting edge 9 of the cutting tip of the front tooth cusp 5 is aligned at an angle ⁇ to a radial Rd 3 , which is designed as an acute angle of at least 20° and a maximum of 40°.
- the angle ⁇ is 23°.
- the rear cutting tip of the rear tooth cusp 6 also has a front cutting edge 10, which is aligned at an acute angle ⁇ to a radial Rd 4 .
- the front cutting edge 10 of the rear tooth cusp 6 is aligned somewhat steeper than the front one Cutting edge 9 of the front tooth cusp 5.
- the angle ⁇ is 25° and is therefore also in the advantageous range between 20° and 40°.
- the milling tooth 3 has a continuous lower edge in the direction of rotation over the entire length of the milling tooth 3 seen in the direction of rotation, which forms a support web 7.
- This support web 7 rests flatly on the surface of the shaft casing 2 of the milling shaft 1 with its entire, circular arc-shaped underside and is cohesively connected to the surface of the shaft casing 2.
- the milling tooth 3 is finally provided with a recess 8, which is positioned at a radial distance above the support web 7 and is essentially triangular in shape, approximately parallel to an outer contour of the front tooth cusp 5.
- the recess 8 is formed as a passage in the form of a punched out and is used for Weight reduction of the milling tooth 3.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Milling Processes (AREA)
- Adjustment And Processing Of Grains (AREA)
Abstract
Fräswelle für eine Schneefräse mit einer Vielzahl von über einen Umfang eines Wellenmantels der Fräswelle verteilt angeordneten Fräszähnen, wobei jeder Fräszahn jeweils mit zwei in Rotationsrichtung der Fräswelle zueinander beabstandeten Zahnhöckern versehen ist, wobei jeder Zahnhöcker jeweils mit einer Schneidspitze versehen ist und die beiden Schneidspitzen jedes Fräszahns in Rotationsrichtung relativ zu einer Drehachse der Fräswelle um einen Umfangswinkel aus einem Bereich zwischen 20° und 40° versetzt zueinander angeordnet sind.Erfindungsgemäß weist eine in Rotationsrichtung vordere Schneidspitze radial gesehen einen um wenigstens 5 mm geringeren Abstand zu dem Wellenmantel auf als die hintere Schneidspitze jedes Fräszahns.Milling shaft for a snow blower with a plurality of milling teeth arranged distributed over a circumference of a shaft shell of the milling shaft, each milling tooth being provided with two tooth humps spaced apart from one another in the direction of rotation of the milling shaft, each tooth hump being provided with a cutting tip and the two cutting tips of each milling tooth in the direction of rotation relative to an axis of rotation of the milling shaft are arranged offset from one another by a circumferential angle from a range between 20 ° and 40 °. According to the invention, a front cutting tip in the direction of rotation, viewed radially, has a distance to the shaft shell that is at least 5 mm smaller than the rear cutting tip of each milling tooth.
Description
Die Erfindung betrifft eine Fräswelle für eine Schneefräse, insbesondere eine Heckfräse einer Pistenraupe, mit einer Vielzahl von über einen Umfang eines Wellenmantels der Fräswelle verteilt angeordneten Fräszähnen, wobei jeder Fräszahn jeweils mit zwei in Rotationsrichtung der Fräswelle zueinander beabstandeten Zahnhöckern versehen ist. Die Erfindung betrifft zudem eine Heckfräse für eine Pistenraupe mit einer derartigen Fräswelle sowie eine Pistenraupe mit einer derartigen Heckfräse.The invention relates to a cutter shaft for a snow blower, in particular a rear cutter of a snow groomer, with a plurality of cutter teeth arranged distributed over a circumference of a shaft shell of the cutter shaft, each cutter tooth being provided with two tooth humps spaced apart from one another in the direction of rotation of the cutter shaft. The invention also relates to a rear cutter for a snow groomer with such a cutter shaft and a snow groomer with such a rear cutter.
Eine derartige Fräswelle für eine Heckfräse einer Pistenraupe ist aus der
Aufgabe der Erfindung ist es, eine Fräswelle, eine Heckfräse und eine Pistenraupe der eingangs genannten Art zu schaffen, die die Erzielung einer feinkörnigen bearbeiteten Schneeoberfläche ermöglichen.The object of the invention is to create a milling shaft, a rear milling machine and a snow groomer of the type mentioned at the outset, which enable the achievement of a fine-grained processed snow surface.
Diese Aufgabe wird für die Fräswelle dadurch gelöst, dass jeder Zahnhöcker jeweils mit einer Schneidspitze versehen ist, wobei die beiden Schneidspitzen jedes Fräszahns in Rotationsrichtung relativ zu einer Drehachse der Fräswelle um einen Umfangswinkel aus einem Bereich zwischen 20° und 40°, vorzugsweise um 30°, versetzt zueinander angeordnet sind, und dass eine in Rotationsrichtung vordere Schneidspitze radial gesehen einen um wenigstens 5 mm geringeren Abstand zu dem Wellenmantel aufweist als die hintere Schneidspitze jedes Fräszahns. Die erfindungsgemäße Fräswelle ermöglicht bei einem Einsatz in einer Schneefräse eine besonders feinkörnige Zerkleinerung von Schnee- und Eisbrocken. Vorzugsweise wird die erfindungsgemäße Fräswelle in einer Heckfräse einer Pistenraupe eingesetzt. Hierdurch ist es möglich, eine feinkörnige, bearbeitete Schneeoberfläche im Betrieb der Heckfräse als Heckanbaugerät einer Pistenraupe zu erzielen. Durch den erfindungsgemäßen Höhenunterschied zwischen der vorderen und der hinteren Schneidspitze jedes Fräszahns erfolgt im Betrieb der Fräswelle eine gleichmäßige Verteilung der Fräsarbeit zwischen beiden Schneidspitzen jedes Fräszahns. Die Höhendifferenz zwischen der vorderen und der hinteren Schneidspitze liegt vorzugsweise zwischen 5 mm und 10 mm. Eine besonders vorteilhafte Fräszahngeometrie sieht eine Höhendifferenz von 7,5 mm vor. Erfindungsgemäß sind die beiden Schneidspitzen jedes Fräszahns zudem in Umfangsrichtung, d.h. in Rotationsrichtung der Fräswelle, über einen relativ großen Umfangswinkel zueinander beabstandet, der aus einem Bereich zwischen 20° und 40° gewählt ist. Besonders vorteilhaft beträgt der Umfangswinkel, d.h. der Rotationswinkel zwischen zwei Radialen zur Drehachse der Fräswelle, die jeweils eine vordere Spitze der jeweiligen Schneidspitze tangieren, 30°. Der relativ große Abstand in Rotationsrichtung zwischen den beiden Schneidspitzen der beiden Zahnhöcker jedes Fräszahns ermöglicht es, dass die hintere Schneidspitze des hinteren Zahnhöckers während einer Rotation der Fräswelle bereits einen ausreichenden Umfangsweg zurückgelegt hat, bevor sie auf einen durch die jeweilige vordere Schneidspitze bereits bearbeiteten Schnee- oder Eisbrocken trifft. Hierdurch erfolgt eine nochmalige Zerkleinerung des durch die vordere Schneidspitze schon bearbeiteten Schnee- oder Eisbrockens durch die jeweils hintere Schneidspitze jedes Fräszahns. Die bevorzugte Höhendifferenz zwischen der niedrigeren vorderen Schneidspitze und der höheren hinteren Schneidspitze jedes Fräszahns von wenigstens 5 mm geht von einer üblichen Bearbeitungstiefe einer Fräswelle einer Heckfräse einer Pistenraupe von etwa 20 mm aus. Damit wird eine zumindest weitgehend gleichmäßige Verteilung der Fräsarbeit auf jede vordere und jede hintere Schneidspitze jedes Fräszahns erreicht. Es ergibt sich somit durch die Kombination der beschriebenen Merkmale für jeden Fräszahn eine doppelte Schneid- oder Trennfunktion entsprechender Schnee- oder Eisbrocken.This task is solved for the milling shaft in that each tooth hump is provided with a cutting tip, the two cutting tips of each milling tooth in the direction of rotation relative to an axis of rotation of the milling shaft by a circumferential angle from a range between 20 ° and 40 °, preferably by 30 ° , are arranged offset from one another, and that a front cutting tip, viewed radially, has a distance to the shaft shell that is at least 5 mm smaller than the rear cutting tip of each milling tooth. When used in a snow blower, the milling shaft according to the invention enables particularly fine-grained shredding of chunks of snow and ice. The milling shaft according to the invention is preferably used in a rear milling machine of a snow groomer. This makes it possible to achieve a fine-grained, processed snow surface when operating the rear cutter as a rear attachment to a snow groomer. Due to the height difference according to the invention between the front and rear cutting tips of each milling tooth, the milling work is evenly distributed between the two cutting tips of each milling tooth during operation of the milling shaft. The height difference between the front and the back Cutting tip is preferably between 5 mm and 10 mm. A particularly advantageous milling tooth geometry provides for a height difference of 7.5 mm. According to the invention, the two cutting tips of each milling tooth are also spaced apart from one another in the circumferential direction, ie in the direction of rotation of the milling shaft, over a relatively large circumferential angle, which is selected from a range between 20° and 40°. Particularly advantageously, the circumferential angle, ie the angle of rotation between two radials to the axis of rotation of the milling shaft, which each touch a front tip of the respective cutting tip, is 30°. The relatively large distance in the direction of rotation between the two cutting tips of the two tooth cusps of each milling tooth enables the rear cutting tip of the rear tooth cusps to have already covered a sufficient circumferential path during rotation of the milling shaft before it comes to a snow that has already been processed by the respective front cutting tip. or hits chunks of ice. As a result, the chunk of snow or ice that has already been processed by the front cutting tip is further shredded by the rear cutting tip of each milling tooth. The preferred height difference between the lower front cutting tip and the higher rear cutting tip of each milling tooth of at least 5 mm is based on a usual machining depth of a milling shaft of a rear milling machine of a snow groomer of approximately 20 mm. This achieves an at least largely uniform distribution of the milling work on each front and rear cutting tip of each milling tooth. The combination of the features described results in a double cutting or separating function for each cutter tooth for corresponding chunks of snow or ice.
Das Vorsehen von Schneidkanten im Bereich der Schneidspitzen ermöglicht Schneid- und Trennfunktionen in größerem radialen Abstand zum Wellenmantel als bei dem zuvor beschriebenen Stand der Technik. Die Fräswelle ermöglicht daher eine gute Schneeoberflächenbearbeitung bereits bei geringerer Bearbeitungstiefe als beim Stand der Technik, der Schneidkanten im Bereich der Stützstege unterhalb der Zahnhöcker aufweist.The provision of cutting edges in the area of the cutting tips enables cutting and cutting functions at a greater radial distance from the shaft shell than in the previously described prior art. The milling shaft therefore enables good snow surface processing at a lower processing depth than in the prior art, which has cutting edges in the area of the support webs below the tooth cusps.
In Ausgestaltung der Erfindung weisen beide Schneidspitzen jeweils eine vordere Schneidkante auf, die jeweils um einen Winkel von wenigstens 20° relativ zu einer die Drehachse der Fräswelle schneidenden Radialen in Rotationsrichtung nach vorne geneigt ist. Durch diese Ausgestaltung sind sowohl die vordere Schneidspitze als auch die hintere Schneidspitze jeweils mit einer in Rotationsrichtung vorderen Schneidkante versehen, die relativ zu einer entsprechenden Radialen jeweils in Rotationsrichtung nach vorne geneigt sind. Hierdurch ergibt sich ein steiles Anstellen der Schneidkanten in Rotationsrichtung, wodurch sich für jede Schneidkante jeder der beiden Schneidspitzen jedes Fräszahns eine echte, messerartige Schneidwirkung ergibt. Dies ist ein Vorteil gegenüber dem Stand der Technik, bei dem die jeweils vordere Zahnspitze jedes Fräszahnes jeweils eine im Wesentlichen radial ausgerichtete vordere Schneidkante aufweist, so dass beim Auftreffen auf Schnee- oder Eisklumpen im Wesentlichen eine Schlagfunktion entsteht, die bei harten Schnee- und Eisbedingungen zu Abplatzungen und großen Schneebrocken führen kann. Durch die erfindungsgemäße Ausgestaltung werden solche Nachteile vermieden.In an embodiment of the invention, both cutting tips each have a front cutting edge, which is inclined forward in the direction of rotation by an angle of at least 20 ° relative to a radial cutting the axis of rotation of the milling shaft. As a result of this configuration, both the front cutting tip and the rear cutting tip are each provided with a front cutting edge in the direction of rotation, which are each inclined forward in the direction of rotation relative to a corresponding radial. This results in a steep angle of the cutting edges in the direction of rotation, which results in a real, knife-like cutting effect for each cutting edge of each of the two cutting tips of each milling tooth. This is an advantage over the prior art, in which the front tooth tip of each milling tooth is essentially radially aligned front cutting edge, so that when it hits clumps of snow or ice, it essentially creates an impact function, which in hard snow and ice conditions can lead to chips and large chunks of snow. The design according to the invention avoids such disadvantages.
In weiterer Ausgestaltung der Erfindung ist die vordere Schneidkante der vorderen Schneidspitze in einem geringeren Winkel relativ zu der die Drehachse schneidenden Radialen nach vorne geneigt als die vordere Schneidkante der hinteren Schneidspitze relativ zu der entsprechenden Radialen. Vorzugsweise ist eine vordere Schneidkante der Schneidspitze des hinteren Zahnhöckers steiler ausgerichtet als die vordere Schneidkante der Schneidspitze des vorderen Zahnhöckers.In a further embodiment of the invention, the front cutting edge of the front cutting tip is inclined forward at a smaller angle relative to the radial intersecting the axis of rotation than the front cutting edge of the rear cutting tip relative to the corresponding radial. Preferably, a front cutting edge of the cutting tip of the rear tooth cusp is aligned steeper than the front cutting edge of the cutting tip of the front tooth cusp.
In weiterer Ausgestaltung der Erfindung sind beide Schneidspitzen jedes Fräszahns von einer gemeinsamen Zahnbasis getragen, die fest mit dem Wellenmantel verbunden ist, wobei die Zahnbasis einen über eine gesamte Länge des Fräszahns - in Rotationsrichtung gesehen - durchgängigen Auflagesteg auf dem Wellenmantel aufweist. Dadurch, dass der Fräszahn über die gesamte Länge einer Unterkante der Zahnbasis, die den durchgängigen Auflagesteg bildet, mit dem Wellenmantel stoffschlüssig oder in anderer Art und Weise fest verbunden ist, ergibt sich eine besonders stabile Anbindung des jeweiligen Fräszahns an den Wellenmantel. Vorzugsweise sind die Fräszähne aus einer Stahllegierung hergestellt und mit einer Oberfläche des Wellenmantels verschweißt. Sowohl die Zahnbasis als auch die beiden Zahnhöcker mit ihren Schneidspitzen sind in einer Ebene zueinander ausgerichtet, so dass sich für den jeweiligen Fräszahn ein plattenförmiges Bauteil ergibt, das vorzugsweise durch Stanzung und anschließendes Schleifen der Schneidkanten hergestellt ist.In a further embodiment of the invention, both cutting tips of each milling tooth are supported by a common tooth base, which is firmly connected to the shaft shell, the tooth base having a continuous support web on the shaft shell over an entire length of the milling tooth - viewed in the direction of rotation. The fact that the milling tooth is cohesively or firmly connected to the shaft shell over the entire length of a lower edge of the tooth base, which forms the continuous support web, results in a particularly stable connection of the respective milling tooth to the shaft shell. The milling teeth are preferably made of a steel alloy and welded to a surface of the shaft shell. Both the tooth base and the two tooth cusps with their cutting tips are aligned in one plane with respect to one another, so that a plate-shaped component results for the respective milling tooth, which is preferably produced by punching and then grinding the cutting edges.
In weiterer Ausgestaltung der Erfindung weist die Zahnbasis wenigstens eine radial oberhalb des Auflagestegs positionierte Aussparung auf. Die Aussparung dient zur Gewichtsreduzierung. Da diese radial oberhalb der durchgängigen Unterkante der Zahnbasis, d.h. des durchgängigen Auflagestegs, in dem jeweiligen Fräszahn ausgebildet ist, wird die Stabilität der Verbindung des Fräszahns mit dem Wellenmantel durch diese Aussparung nicht beeinträchtigt. Die Aussparung wird vorzugsweise durch eine geeignete Ausstanzung in dem plattenförmigen Bauteil des Fräszahns erzielt.In a further embodiment of the invention, the tooth base has at least one recess positioned radially above the support web. The recess serves to reduce weight. Since this is formed radially above the continuous lower edge of the tooth base, i.e. the continuous support web, in the respective milling tooth, the stability of the connection of the milling tooth to the shaft shell is not affected by this recess. The recess is preferably achieved by a suitable punching in the plate-shaped component of the milling tooth.
Für die Heckfräse für eine Pistenraupe wird die der Erfindung zugrunde liegende Aufgabe durch die Merkmale des Anspruchs 6 gelöst.For the rear cutter for a snow groomer, the object on which the invention is based is solved by the features of
Für die Pistenraupe mit einer derartigen Heckfräse wird die der Erfindung zugrunde liegende Aufgabe durch die Merkmale des Anspruchs 7 gelöst.For the snow groomer with such a rear cutter, the object on which the invention is based is solved by the features of
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 schematisch eine Ausführungsform einer erfindungsgemäßen Pistenraupe mit einer heckseitig angebauten Ausführungsform einer erfindungsgemäßen Heckfräse,
- Fig. 2
- die Heckfräse für die Pistenraupe gemäß
Fig. 1 , - Fig. 3
- schematisch in vergrößerter Darstellung einen Querschnitt durch eine Ausführungsform einer erfindungsgemäßen Fräswelle für die Heckfräse nach den
Fig. 1 und2 und - Fig. 4
- in weiter vergrößerter und detaillierter Darstellung einen Fräszahn für die Fräswelle gemäß
Fig. 3 .
- Fig. 1
- shows schematically an embodiment of a snow groomer according to the invention with a rear-mounted embodiment of a rear tiller according to the invention,
- Fig. 2
- the rear cutter for the snow groomer according to
Fig. 1 , - Fig. 3
- schematically an enlarged view of a cross section through an embodiment of a milling shaft according to the invention for the rear tiller according to
Fig. 1 and2 and - Fig. 4
- in a further enlarged and detailed representation of a milling tooth for the milling shaft
Fig. 3 .
Eine Pistenraupe P gemäß
Anhand der
Wie in
Zudem ist aus
Wie anhand der
Claims (7)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102022202430.3A DE102022202430B4 (en) | 2022-03-10 | 2022-03-10 | Milling shaft for a snow blower, in particular a rear tiller of a snow groomer |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4242378A1 true EP4242378A1 (en) | 2023-09-13 |
Family
ID=85381375
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP23158113.3A Pending EP4242378A1 (en) | 2022-03-10 | 2023-02-23 | Milling shaft for snow tiller, in particular rear tiller of snow tiller |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP4242378A1 (en) |
DE (1) | DE102022202430B4 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5581914A (en) * | 1995-11-21 | 1996-12-10 | Lmc Operating Corp. | Snow cutting tooth for rotating cutter bar of ski slope tiller |
DE102013204723A1 (en) | 2013-03-18 | 2014-09-18 | Kässbohrer Geländefahrzeug AG | Milling shaft for a tail mill of a snow groomer |
CN113216066A (en) * | 2021-04-21 | 2021-08-06 | 河北宣工机械发展有限责任公司 | Snow beating teeth of snow pressing vehicle capable of improving snow beating efficiency |
EP4183929A1 (en) * | 2021-11-23 | 2023-05-24 | PRINOTH S.p.A. | Snow tooth for a snow tiller and said snow tiller for the preparation of the snow cover of the ski slopes |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102020215706A1 (en) | 2020-12-11 | 2022-06-15 | Kässbohrer Geländefahrzeug Aktiengesellschaft | Milling shaft for a rear tiller of a snow groomer and rear tiller |
-
2022
- 2022-03-10 DE DE102022202430.3A patent/DE102022202430B4/en active Active
-
2023
- 2023-02-23 EP EP23158113.3A patent/EP4242378A1/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5581914A (en) * | 1995-11-21 | 1996-12-10 | Lmc Operating Corp. | Snow cutting tooth for rotating cutter bar of ski slope tiller |
DE102013204723A1 (en) | 2013-03-18 | 2014-09-18 | Kässbohrer Geländefahrzeug AG | Milling shaft for a tail mill of a snow groomer |
CN113216066A (en) * | 2021-04-21 | 2021-08-06 | 河北宣工机械发展有限责任公司 | Snow beating teeth of snow pressing vehicle capable of improving snow beating efficiency |
EP4183929A1 (en) * | 2021-11-23 | 2023-05-24 | PRINOTH S.p.A. | Snow tooth for a snow tiller and said snow tiller for the preparation of the snow cover of the ski slopes |
Also Published As
Publication number | Publication date |
---|---|
DE102022202430A1 (en) | 2023-09-14 |
DE102022202430B4 (en) | 2024-08-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1780375B1 (en) | Cutting tooth for earth working equipment | |
DE3624861C2 (en) | ||
DE102014207501B4 (en) | Rotary tool, in particular drill, and method for producing such a rotary tool | |
DE3130828C2 (en) | Tool for cutting out slices from metallic material | |
DE19857451A1 (en) | Cutting or breaking tool and cutting insert for this | |
EP2454043B1 (en) | Drill | |
WO2011038896A1 (en) | Drill | |
DE3024852C2 (en) | ||
EP1083294B1 (en) | Drilling tool | |
DE2423963A1 (en) | EARTH WORKING TOOL | |
WO2012159947A2 (en) | Rock drill having relief grooves | |
DE2629284B2 (en) | Milling machine for shoulder, trench and embankment cleaning | |
DE3308478A1 (en) | Shank-type cutter | |
EP4242378A1 (en) | Milling shaft for snow tiller, in particular rear tiller of snow tiller | |
DE2106196A1 (en) | Cutting insert for metalworking tools | |
EP4134488B1 (en) | Milling wheel | |
DE19855364B4 (en) | cutting part | |
DE3344113A1 (en) | Rotating cutter body of a trench profile cutter, verge cutter or the like | |
DE3334071C2 (en) | ||
EP1958589A1 (en) | Dental milling cutter | |
DE29612342U1 (en) | Progressive screw drills | |
DE2815165A1 (en) | TOOL FOR GROUND WORK | |
EP0157157B1 (en) | Rebating or groving cutter for the machining of wood or plastics | |
DE4431551A1 (en) | Towed breaker vehicle for road surface | |
DE3305113C2 (en) | Circular saw blade |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20240226 |
|
RBV | Designated contracting states (corrected) |
Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20240723 |