EP2781658B1 - Fraise arrière pour une dameuse - Google Patents

Fraise arrière pour une dameuse Download PDF

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Publication number
EP2781658B1
EP2781658B1 EP14159228.7A EP14159228A EP2781658B1 EP 2781658 B1 EP2781658 B1 EP 2781658B1 EP 14159228 A EP14159228 A EP 14159228A EP 2781658 B1 EP2781658 B1 EP 2781658B1
Authority
EP
European Patent Office
Prior art keywords
tiller
tooth
shaft
teeth
cutting
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.)
Active
Application number
EP14159228.7A
Other languages
German (de)
English (en)
Other versions
EP2781658A3 (fr
EP2781658A2 (fr
Inventor
Roland Brucker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kassbohrer Gelandefahrzeug AG
Kaessbohrer Gelaendefahrzeug AG
Original Assignee
Kassbohrer Gelandefahrzeug AG
Kaessbohrer Gelaendefahrzeug AG
Priority date (The priority date 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 date listed.)
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Publication date
Application filed by Kassbohrer Gelandefahrzeug AG, Kaessbohrer Gelaendefahrzeug AG filed Critical Kassbohrer Gelandefahrzeug AG
Publication of EP2781658A2 publication Critical patent/EP2781658A2/fr
Publication of EP2781658A3 publication Critical patent/EP2781658A3/fr
Application granted granted Critical
Publication of EP2781658B1 publication Critical patent/EP2781658B1/fr
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Classifications

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

Definitions

  • the invention relates to a rear tiller for a snowcat according to the preamble of claim 1.
  • Such a tail mill is from the US 5 581 914 known.
  • the known tail mill has a milling shaft which is rotatably mounted in a Fräsengehause and driven by a drive means in a rotational direction, which causes a milling function of a snow surface to be processed.
  • the milling shaft has on its outer circumference distributed cutting teeth, each comprising a milling head and two support webs, by means of which each cutter tooth is supported on the outer surface of the cutter shaft.
  • the two support webs are spaced from each other in the circumferential direction of the cutter shaft and arranged in a common flight, wherein a rear support web of each cutter tooth is inclined relative to the front support web, that in the region of the respective rear support web snow guiding function results to the side.
  • a front end edge of the respective rear in the direction of rotation support ridge of each cutter tooth is arranged in alignment with the front support bar.
  • the rear support webs therefore have no cutting function for the snow surface to be processed.
  • From the US 1 640 811 is an agricultural device in the form of a cultivator known which comprises a driven by two wheels cultivator shaft.
  • the cultivator shaft has at its outer periphery cultivator teeth, each having a tooth head and two support webs which carry the tooth head and are tilted in opposite directions.
  • the object of the invention is to provide a rear tiller of the type mentioned, which allows a further improved crushing and milling function.
  • the rear tiller according to the invention is used for a snow groomer for snow surface processing, in particular in the area of ski and snowboard slopes or in the area of snow parks and cross-country ski trails.
  • a rear tiller can be one or more across the width of the Rear tiller comprise arranged distributed cutter shafts, each cutter shaft is mounted in a corresponding Fräsengephaseuseabrough the rear tiller.
  • the front side end edges of both support webs of each cutting tooth are provided with cutting surfaces.
  • the cutting surfaces are sharp-edged in the manner of a knife blade designed to crush the corresponding snow and ice lumps in the operation of the rear tiller not by hitting, but by cutting.
  • each support bar are formed by double cutting.
  • the design of each cutting surface as a double cutting edge provides that a blade-shaped cutting edge takes place by bevelling from opposite sides, resulting in a triangular cutting tip in cross-section.
  • the support webs are inclined relative to a plane of the tooth head in opposite directions.
  • the plane of the tooth head corresponds approximately to a radial plane of the milling shaft.
  • the support webs are inclined starting from an underside of the tooth head, starting in the opposite direction to the outer shell of the milling shaft, so that the support webs are aligned opposite each other in opposite directions.
  • the support webs of each cutting tooth are aligned in their standing on the outer surface of the milling shaft foot areas in the direction of rotation of the milling shaft parallel to each other.
  • the support webs of the respective cutting tooth therefore have - in contrast to the previously described prior art - no Schneeleitfunktion to the side.
  • the support webs are inclined at equal angular amounts relative to the plane of the tooth head. Seen in the cutting direction of each cutting tooth, the support webs therefore extend mirror-symmetrically to a cutting plane of the milling head of each cutting tooth.
  • the cutting surface of a front in the direction of rotation of the cutter shaft support web of each cutting tooth up to an upper end of the milling head continued.
  • a front end edge of each cutter tooth therefore has a cutting function over its entire height.
  • each cutting tooth viewed in the direction of rotation of the milling shaft, rear end edges of the support webs of each cutting tooth are provided with cutting surfaces. Due to the material removal in the area of the narrow cutting surfaces results in a weight reduction. In addition, a cutting function is possible even with a counter-rotation of the milling shaft against a normal milling and rotation. Finally, all-round processing of each cutting tooth by front and back cutting surfaces is visually appealing.
  • a plurality of cutting teeth distributed over a length of the milling shaft is provided, which are divided into a plurality of evenly spaced axially spaced and arranged in radial planes of the axis of rotation of the milling shaft ring rows, wherein the counted in the axial direction n-th ring rows to each other identical cutting teeth and the n + 1-th ring rows compared to the cutting teeth of the n-th rows of rings have different cutting teeth, which are provided with mirror-inverted supporting webs.
  • the adjacent rows of rings are therefore provided alternately with cutting teeth, which have mirror images of mutually offset support webs.
  • the milling teeth of all rows of rings therefore differ from each other only in that the support webs are inclined mirror images of each other. This means that in the one milling teeth, the front support webs - seen in the direction of rotation of the cutter shaft - tilted to the left and the associated rear support webs are inclined to the right, and that the support webs are inclined at the other Fräszähnen front to right and rear to the left.
  • the cutting teeth of all n-th ring rows as well as the cutting teeth of all n + 1-th ring rows - as seen in the longitudinal direction of the cutter shaft - offset in the circumferential direction to each other. This means that the cutting teeth - seen in the longitudinal direction of the cutter shaft - are not rectilinearly aligned with each other, but rather are arranged offset along corresponding helical cam tracks over the circumference of the milling shaft.
  • the invention also relates to a snow groomer with such a tail mill.
  • a milling shaft 1 after Fig. 1 is intended for use in a rear tiller of a snow groomer for the processing and design of snow surfaces.
  • a tail mill is cultivated in a generally known manner at the rear of a snow groomer.
  • the rear tiller is provided with a milling housing, which comprises at least two housing sections, in each of which a milling shaft 1 is rotatably mounted.
  • the milling shafts 1 are about hydraulic or electric drives about its axis of rotation in the direction of milling D ( Fig. 1 ) as soon as the tail mill is put into operation.
  • the at least two milling shafts within the milling housing are designed identically to one another.
  • One of the two Fräswellen 1 is based on the Fig. 1 to 6 described in more detail below.
  • the rear tiller is also equipped with a finisher assembly positioned behind the auger shafts for smoothing and compacting the snow and ice subsurface machined by the rear tiller in towing mode when the rear tiller is pulled behind the
  • the milling shaft 1 has a cylindrical outer shell 2, on which over the length of the milling shaft 1 distributed a plurality of cutting teeth 3 are attached.
  • the cutting teeth 3 are arranged distributed uniformly over the circumference of the outer shell 2 of the milling shaft 1. In this case, adjacent cutting teeth 3 are arranged offset to one another in the circumferential direction and in the longitudinal direction of the milling shaft 1, such as Fig. 1 is removable.
  • the cutting teeth 3 are fixed in the illustrated embodiment by welding on the outer shell 2 of the milling shaft 1. All the cutting teeth 3 of the milling shaft 1 are designed with respect to their tooth heads 4 identical to each other. As based on the Fig.
  • the milling teeth 3b in the drawing according to Fig. 1 second, fourth, sixth and eighth ring rows seen from the right, on the other hand, have front supporting webs which are offset to the right and rear supporting webs which are offset to the left in relation to the planes of the tooth heads.
  • the milling teeth 3a and 3b are identical except for their mirror images of each other staggered support webs 5, 6 designed. Subsequently, the cutting teeth 3a, 3b are therefore referred to together again with the reference numeral 3 for the purpose of standardization.
  • the cutting tooth 3 after the Fig. 2 to 6 is in one piece of metal, preferably made of steel, and has a tooth head 4 and two the tooth head 4 supporting support webs 5, 6, by means of which the tooth head 4 is mounted on the outer shell 2 of the milling shaft 1.
  • the tooth head 4 has a front bump 7 in the cutting direction and a rear bump 8 in the cutting direction on, which are separated by a trough-like recess.
  • the cutting tooth 3 is manufactured as a forging. Both the tooth head 4 and the support webs 5, 6 have approximately the same strength, as based on the 4 and 5 is recognizable.
  • the support webs 5, 6 are slightly stronger than the tooth head, in that its thickness between 1 and 2 mm, preferably 1.5 mm, is greater than the thickness of the tooth head.
  • the front hump 7 and the rear hump 8 lie in a common plane of the overall flat tooth head 4, which is aligned in the mounted state on the outer shell 2 of the milling shaft 1 in a radial plane of the milling shaft 1 - based on the axis of rotation.
  • the two support webs 5, 6 close to the tooth tip 4 inwards towards the outer casing 2. Both support webs 5, 6 extend in their width from the tooth head 4, starting down to the outer shell 2 of the milling shaft 1, as shown in the FIGS. 2 and 3 is clearly recognizable.
  • the two support webs 5 and 6 are supported by means of foot areas on the outer shell 2 of the milling shaft 1 and are welded to the outer shell 2 at these foot areas.
  • the support webs 5, 6 are inclined out of the plane of the tooth head 4 out in opposite directions.
  • the angle of each support bar 5, 6 relative to the plane of the tooth head 4 is between 10 ° and 20 °.
  • Fig. 5 It can be seen that the left web 5 is inclined relative to the plane of the tooth head 4 in the clockwise direction by a corresponding angular amount between 10 ° and 20 °, whereas the right support web 6 is bent out of the plane of the tooth head 4 in the counterclockwise direction.
  • the angular amounts of the two support webs 5, 6 relative to the plane of the tooth head 4 are identical.
  • both a front end edge of the front support web 5 in the direction of rotation D and a front end edge of the rear support web 6 each form a cutting surface 9, 10, so that both support webs 5, 6 have a cutting function for corresponding snow or ice chunks.
  • the front edge of the front support web 5 is provided with a cutting surface 9 which extends from the foot region of the support web 5 to the head region of the front hump 7 of the tooth head 4.
  • the rear support bar 6 is provided with a cutting surface 10 in the region of the front end edge.
  • Both cutting surfaces 9 and 10 are as double cutting executed, which form seen in a cross section triangular cutting tips by the cutting surface 9, 10 is bevelled from opposite sides (see in particular 4 to 6 ).
  • each cutter tooth 3 also has a cutting surface 11, 12 in the region of the rear end flanks of each support web 5, 6, which are also designed as double cutting analogous to the front cutting surfaces.
  • the rear cutting surface 12 of the rear support bar 6 extends analogously to the front cutting surface 9 of the front support bar 5 into the head region of the rear hump 8 of the tooth head 4th
  • the foot portions of the two support webs 5 and 6 are formed according to the cross sections of the support webs 5 and 6 narrow and long, as in particular with reference to 4 and 6 is recognizable.
  • the longitudinal extension of the foot portions of the support webs 5 and 6 takes place in the assembled state of each cutting tooth 3 in the circumferential direction, so that corresponding longitudinal axes of the two foot portions of the support webs 5 and 6 are aligned parallel to each other and in the circumferential direction of the outer shell 2 of the milling shaft 1.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Milling Processes (AREA)

Claims (11)

  1. Fraise arrière pour un véhicule chenillé (dameuse) avec au moins un arbre de fraise (1) monté de manière rotative dans un boîtier de fraise, l'arbre étant entraîné hydrauliquement ou électriquement lors du fonctionnement de la fraise arrière et l'arbre étant doté d'une pluralité de dents de fraise réparties sur une enveloppe extérieure de l'arbre de fraise, chacune des dents comprenant une tête de dent ainsi que deux arêtes de support, au moyen desquelles chaque tête de dent s'appuie sur l'enveloppe extérieure, les arêtes de support de chaque dent de fraise étant fixées à l'enveloppe extérieure espacées l'une de l'autre dans la direction circonférentielle de l'arbre de fraise, les deux arêtes de support (5, 6) de chaque dent de fraise (3), vu dans la direction longitudinale de l'arbre de fraise (1), étant décalées axialement l'une par rapport à l'autre de telle manière que, vu dans la direction de rotation (D) de l'arbre de fraise (1), des bords de face du côté frontal des deux arêtes de support (5, 6) présentent respectivement une fonction de séparation pour des morceaux de neige ou de glace,
    caractérisée en ce que
    les arêtes de support (5, 6) sont disposées en orientation inclinée par rapport à un plan de la tête de dent (4) à partir d'une partie inférieure de la tête de dent (4) vers l'enveloppe extérieure de l'arbre de fraise (1) en sens opposé, dans laquelle le plan de la tête de dent (4) correspond approximativement à un plan radial de l'arbre de fraise (1).
  2. Fraise arrière selon la revendication 1, caractérisée en ce que les bords de face du côté frontal des deux arêtes de support (5, 6) de chaque dent de fraise (3) sont munis de faces de coupe (9, 10).
  3. Fraise arrière selon la revendication 2, caractérisée en ce que les faces de coupe (9, 10) de chaque arête de support (5, 6) se composent de lames à double tranchant.
  4. Fraise arrière selon l'une quelconque des revendications précédentes, caractérisée en ce que les arêtes de support (5, 6) de chaque dent de fraise (3) sont orientées en parallèle l'une à l'autre dans leurs régions de pied reposant sur l'enveloppe extérieure (2) de l'arbre de fraise (1) dans la direction de rotation (D) de l'arbre de fraise (1).
  5. Fraise arrière selon la revendication 1, caractérisée en ce que les arêtes de support (5, 6) présentent une orientation oblique par rapport au plan de la tête de dent (4) avec des valeurs d'angle identiques.
  6. Fraise arrière selon l'une quelconque des revendications précédentes, caractérisée en ce que la face de coupe (9) d'une arête de support (5) avant dans la direction de rotation de l'arbre de fraise (1) de chaque dent de fraise (3) se prolonge jusqu'à une extrémité supérieure de la tête de dent (4).
  7. Fraise arrière selon la revendication 6, caractérisée en ce que, vu dans la direction de rotation de l'arbre de fraise (1), bords de face du côté arrière des arêtes de support (5, 6) de chaque dent de fraise (3) sont munis de faces de coupe (11, 12).
  8. Fraise arrière selon l'une quelconque des revendications précédentes, caractérisée en ce que, répartis le long d'une longueur de l'arbre de fraise (1), une pluralité de dents de fraise (3a, 3b) sont prévues, qui sont divisées en plusieurs rangées annulaires axialement espacées l'une de l'autre uniformément et disposées dans des plans radiaux de l'axe de rotation de l'arbre de fraise (1), dans laquelle les n-èmes rangées annulaires, comptées dans la direction axiale, présentent des dents de fraise (3a) identiques l'une à l'autre et les (n+1)-èmes rangées annulaires présentent des dents de fraise (3b) différentes par rapport aux dents de fraise (3a) des n-èmes rangées annulaires, lesdites dents munis d'arêtes de support (5, 6) décalées en miroir.
  9. Fraise arrière selon la revendication 8, caractérisée en ce que les dents de fraise (3a) des n-èmes rangées annulaires et les dents de fraise (3b) des (n+1)-èmes rangées annulaires présentent des têtes de dent (4) identiques l'une à l'autre.
  10. Fraise arrière selon la revendication 8 ou 9, caractérisée en ce que les dents de fraise (3a) de tous les n-èmes rangées annulaires ainsi que les dents de fraise (3b) de tous les (n+1)-èmes rangées annulaires sont disposées chacune, vu dans la direction longitudinale de l'arbre de fraise (1), décalées l'une par rapport à l'autre dans la direction circonférentielle.
  11. Véhicule chenillé (dameuse) pour le traitement d'une piste à neige avec une fraise arrière selon l'une quelconque des revendications précédentes.
EP14159228.7A 2013-03-18 2014-03-12 Fraise arrière pour une dameuse Active EP2781658B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102013204723.1A DE102013204723A1 (de) 2013-03-18 2013-03-18 Fräswelle für eine Heckfräse einer Pistenraupe

Publications (3)

Publication Number Publication Date
EP2781658A2 EP2781658A2 (fr) 2014-09-24
EP2781658A3 EP2781658A3 (fr) 2014-12-03
EP2781658B1 true EP2781658B1 (fr) 2019-02-20

Family

ID=50342164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14159228.7A Active EP2781658B1 (fr) 2013-03-18 2014-03-12 Fraise arrière pour une dameuse

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EP (1) EP2781658B1 (fr)
DE (1) DE102013204723A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104818684B (zh) * 2015-04-29 2016-08-17 华北理工大学 一种雪橇式平冰除冰机刮盘
DE102020210112A1 (de) * 2020-08-10 2022-02-10 Kässbohrer Geländefahrzeug Aktiengesellschaft Heckanbaugerät für eine Pistenraupe und Pistenraupe
DE102020215732A1 (de) 2020-12-11 2022-06-15 Kässbohrer Geländefahrzeug Aktiengesellschaft Heckfräse für eine Pistenraupe
DE102020215706A1 (de) 2020-12-11 2022-06-15 Kässbohrer Geländefahrzeug Aktiengesellschaft Fräswelle für eine Heckfräse einer Pistenraupe und Heckfräse
IT202100029603A1 (it) * 2021-11-23 2023-05-23 Prinoth Spa Dente da neve per una fresa da neve e detta fresa da neve per la preparazione del manto nevoso delle piste da sci
DE102022202430B4 (de) 2022-03-10 2024-08-22 Kässbohrer Geländefahrzeug Aktiengesellschaft Fräswelle für eine Schneefräse, insbesondere eine Heckfräse einer Pistenraupe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1640811A (en) * 1924-02-29 1927-08-30 Spitzenberg Georg Karl Grubber or cultivator
US5581914A (en) 1995-11-21 1996-12-10 Lmc Operating Corp. Snow cutting tooth for rotating cutter bar of ski slope tiller
DE102009053572B4 (de) * 2009-11-06 2016-03-17 Kässbohrer Geländefahrzeug AG Heckanbaugerät für eine Pistenraupe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DE102013204723A1 (de) 2014-09-18
EP2781658A3 (fr) 2014-12-03
EP2781658A2 (fr) 2014-09-24

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