EP4012103A1 - Arbre fraiseur pour une fraise arrière d'une dameuse et fraise arrière - Google Patents

Arbre fraiseur pour une fraise arrière d'une dameuse et fraise arrière Download PDF

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Publication number
EP4012103A1
EP4012103A1 EP21213067.8A EP21213067A EP4012103A1 EP 4012103 A1 EP4012103 A1 EP 4012103A1 EP 21213067 A EP21213067 A EP 21213067A EP 4012103 A1 EP4012103 A1 EP 4012103A1
Authority
EP
European Patent Office
Prior art keywords
milling
shaft
snow
teeth
tiller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21213067.8A
Other languages
German (de)
English (en)
Other versions
EP4012103B1 (fr
Inventor
Andreas Behmüller
Daniel Hartmann
Claudius Henger
Sven HOLZAPFEL
Martin Mangold
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.)
Filing date
Publication date
Application filed by Kassbohrer Gelandefahrzeug AG, Kaessbohrer Gelaendefahrzeug AG filed Critical Kassbohrer Gelandefahrzeug AG
Publication of EP4012103A1 publication Critical patent/EP4012103A1/fr
Application granted granted Critical
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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 cutter shaft for a rear cutter of a snow groomer for working snow surfaces, with a cylindrical shaft body from whose cylinder jacket a multiplicity of cutter teeth protrude outwards, which are arranged distributed over the cylinder jacket.
  • the invention also relates to a rear tiller with such a tiller shaft.
  • Such a milling shaft is from DE 10 2013 204 723 A1 known.
  • the well-known tiller shaft is part of a rear tiller of a snow groomer.
  • the tiller shaft is rotatably mounted in a tiller box of the rear tiller and is driven by a hydraulic or electric drive motor when fully assembled.
  • the tiller shaft is driven in such a way that snow grain sizes milled on the snow surface to be worked on by the tiller shaft are thrown from behind by about three quarters of a turn of the tiller shaft upwards and forward in front of the tiller shaft.
  • the snow grain sizes are constantly thrown against an impact wall of the tiller box surrounding the tiller shaft, from which they are thrown back onto the rotating tiller teeth of the tiller shaft. This results in an inevitable crushing of the snow grain sizes.
  • a smoothing device with an elastically moveable finisher is provided on the tiller box behind the tiller shaft, which smooths and compresses the crushed snow grain sizes.
  • the object of the invention is to create a milling shaft and a rear milling cutter of the type mentioned at the outset, which enable a further improved preparation of snow surfaces for winter sports compared to the prior art.
  • this object is achieved in that, in addition to the milling teeth, several blade elements are provided which are distributed over the cylinder jacket and which, when the milling shaft is in milling operation, carry along snow and ice particles in the direction of rotation of the milling shaft for at least half a revolution of the milling shaft.
  • the snow and ice particles form the different snow grain sizes.
  • the solution according to the invention at least largely avoids imperfections in a treated snow slope surface. Such voids are holes in the form of negative voids and lumps in the form of positive voids.
  • the solution according to the invention enables a significantly larger quantity of snow grain sizes to be transported over the cutting shaft forward in front of the cutting shaft, so that the snow grain sizes can be broken up much more efficiently by the cutting teeth in comparison to the prior art.
  • a large proportion of the snow that has been milled is transported back in front of the milling shaft by about three-quarters of a turn, which enables significantly improved comminution of the snow grain sizes between the milling teeth and the impact wall of the milling box.
  • the shovel elements make it possible to transport this relatively large quantity of snow particle sizes without significantly increasing the power requirement of a corresponding drive system for the milling shaft.
  • the solution according to the invention results in a high fine-grained surface of the processed snow slope and consequently with a subsequent finisher arrangement of a rear tiller also an improved and particularly uniform snow compaction.
  • the shovel function of snow grain sizes which is present in addition to the milling function of the milling teeth, is decisive for the shovel elements.
  • the blade elements are designed in such a way that they do not adversely affect the milling function of the milling teeth.
  • the blade elements are extended in spaces between adjacent cutting teeth.
  • the blade elements are positioned offset to the cutting teeth in the circumferential direction and/or in the longitudinal direction of the shaft body.
  • the blade elements are preferably aligned parallel to an axis of rotation of the milling shaft.
  • the blade elements can also be inclined at small angles, preferably between 0° and 30°, relative to the longitudinal extent of the milling shaft.
  • the blade elements can be positioned in a common alignment in the longitudinal direction of the milling shaft or offset from one another in the circumferential direction.
  • the blade elements can also be positioned between two adjacent cutting teeth in the case of cutting teeth that are also offset in the longitudinal direction, but can be offset in the circumferential direction over the length of the cutting shaft.
  • each blade element protrudes at least largely radially and in the longitudinal direction of the shaft body from the cylinder jacket.
  • the radial protrusion is to be understood as a protrusion orthogonal to a tangential plane of the cylinder jacket at the corresponding circumferential position.
  • the blade elements are designed to be straight or curved or angled.
  • the curvature or angling is preferably designed in such a way that pocket-like receptacles are formed by the blade elements in the blade direction.
  • the blade elements are designed as sheet metal parts and are integrally connected to the cylinder jacket.
  • the blade elements are preferably web-shaped sheet steel parts that are welded onto the cylinder surface of the milling shaft.
  • a radial height of a blade element is less than a radial height of a cutting tooth.
  • the radial height of the blade element is less than one half of a height of the cutting tooth. This configuration ensures that the milling function of the milling teeth and the shoveling function of the shovel elements complement each other well.
  • a plurality of blade elements extend in a common alignment over the length of the shaft body in the longitudinal direction of the shaft body.
  • the blade elements thus each extend along a line parallel to the axis of rotation of the milling shaft and thus in the longitudinal direction of the shaft body.
  • a tracked vehicle in the form of a snow groomer is used to treat snow surfaces in winter sports areas.
  • Such a snow groomer has a front attachment in the form of a clearing blade and a rear attachment in the form of a rear tiller 1 according to the Figures 1 to 3 on.
  • the rear tiller 1 is detachably attached to a vehicle-side rear implement carrier of the snow groomer.
  • the rear tiller 1 has a support structure 5 which carries a tiller box with a curved impact wall 3 .
  • a milling shaft 2 is rotatably mounted in the milling box and can be driven by a drive motor of a drive system of the rear tiller 1 in a manner that is not shown in detail.
  • the milling shaft 2 is rotatably mounted about an axis of rotation D in the milling box. Using the thick arrow in 3 the driving direction of rotation for the milling shaft 2 is illustrated. It can be seen that in the representation according to the Fig. 1 or 3 the tiller shaft 2 is driven counterclockwise, the tiller shaft 2 partially immersing in a snow surface S in a manner described in more detail below and 3 recognizable grain sizes of snow behind the milling shaft 2 and throws it forward through the milling box in front of the milling shaft 2.
  • the snow grain sizes are thrown over the cutting shaft 2 against the impact wall 3 of the cutting box, which surrounds the cutting shaft 2 at a distance over part of its circumference, and from there back onto the cutting shaft 2, which means that the snow particles are broken up during transport over the cutting shaft 2 snow grain sizes takes place.
  • the milling shaft 2 has according to 2 a tubular shaft body 6 which is cylindrical in shape.
  • a multiplicity of cutting teeth 8 are distributed on a cylinder surface 7 of the shaft body 6 .
  • the cutting teeth 8 are made of metal and are welded onto the cylinder jacket 7 of the shaft body 6 of the cutting shaft 2 . How based on 2 is clearly visible, all cutting teeth 8 are aligned with their longitudinal extent in the circumferential direction and are spaced apart from one another both in the longitudinal direction of the shaft body 6 and in the circumferential direction.
  • Blade elements 9 are arranged between the cutting teeth 8 and are aligned transversely to the cutting teeth 8 and thus extend parallel to the axis of rotation D in the longitudinal direction of the shaft body 6 .
  • One blade element 9 each extends between two adjacent cutting teeth 8.
  • each blade element 9 is designed as a sheet metal web which is welded onto the cylinder jacket 7 of the shaft body 6 and is consequently firmly connected to the shaft body 6 .
  • Each blade element 9 contacts one side wall of the two adjacent cutting teeth 8 with its opposite end faces.
  • the blade elements are designed as straight sheet metal webs and protrude outwards in a radial longitudinal plane to the axis of rotation D. Each blade element 9 is thus directed outwards orthogonally to a tangential plane of the cylinder jacket 7 .
  • the shovel elements 9 take snow grain sizes, which have been milled open by the milling teeth 8 in the area of the snow surface S, behind the milling shaft 2 upwards, transport them through the milling box and throw them forward in front of the milling shaft 2. The whole thing takes place while the snow groomer travels along the snow surface S and drags the rear tiller 1 with it.
  • the direction of travel of the snow groomer and thus also the towing direction and working direction of the rear tiller 1 is in the Figures 1 and 3 turned to the left.
  • a finisher arrangement 4 Positioned behind the milling shaft 2 on the milling box and on the support structure 5 is a finisher arrangement 4 which compacts and smoothes the fine-grained snow surface processed by the milling shaft 2 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soil Working Implements (AREA)
  • Shovels (AREA)
EP21213067.8A 2020-12-11 2021-12-08 Arbre fraiseur pour une fraise arrière d'une dameuse et fraise arrière Active EP4012103B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020215706.5A DE102020215706A1 (de) 2020-12-11 2020-12-11 Fräswelle für eine Heckfräse einer Pistenraupe und Heckfräse

Publications (2)

Publication Number Publication Date
EP4012103A1 true EP4012103A1 (fr) 2022-06-15
EP4012103B1 EP4012103B1 (fr) 2024-07-03

Family

ID=78824693

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21213067.8A Active EP4012103B1 (fr) 2020-12-11 2021-12-08 Arbre fraiseur pour une fraise arrière d'une dameuse et fraise arrière

Country Status (2)

Country Link
EP (1) EP4012103B1 (fr)
DE (1) DE102020215706A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022202430A1 (de) 2022-03-10 2023-09-14 Kässbohrer Geländefahrzeug Aktiengesellschaft Fräswelle für eine Schneefräse, insbesondere eine Heckfräse einer Pistenraupe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981003353A1 (fr) * 1980-05-19 1981-11-26 Lorean Mfg Co Machine rotative a labourer la neige a traction reversible
US5581914A (en) * 1995-11-21 1996-12-10 Lmc Operating Corp. Snow cutting tooth for rotating cutter bar of ski slope tiller
DE102013204723A1 (de) 2013-03-18 2014-09-18 Kässbohrer Geländefahrzeug AG Fräswelle für eine Heckfräse einer Pistenraupe
DE102009053572B4 (de) * 2009-11-06 2016-03-17 Kässbohrer Geländefahrzeug AG Heckanbaugerät für eine Pistenraupe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1759134U (de) 1957-11-05 1958-01-02 No Sag Drahtfedern Gmbh Scharnier zur befestigung der sinusfedern von polstermoebeln.
CH660978A5 (en) 1983-04-15 1987-06-30 Viktor Meili Ag Fuer Konstrukt Track-making device for making courses in the snow

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981003353A1 (fr) * 1980-05-19 1981-11-26 Lorean Mfg Co Machine rotative a labourer la neige a traction reversible
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
DE102013204723A1 (de) 2013-03-18 2014-09-18 Kässbohrer Geländefahrzeug AG Fräswelle für eine Heckfräse einer Pistenraupe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022202430A1 (de) 2022-03-10 2023-09-14 Kässbohrer Geländefahrzeug Aktiengesellschaft Fräswelle für eine Schneefräse, insbesondere eine Heckfräse einer Pistenraupe

Also Published As

Publication number Publication date
DE102020215706A1 (de) 2022-06-15
EP4012103B1 (fr) 2024-07-03

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