WO2009034184A1 - Rotary snow tiller for grooming ski slopes, and relative operating method - Google Patents

Rotary snow tiller for grooming ski slopes, and relative operating method Download PDF

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Publication number
WO2009034184A1
WO2009034184A1 PCT/EP2008/062210 EP2008062210W WO2009034184A1 WO 2009034184 A1 WO2009034184 A1 WO 2009034184A1 EP 2008062210 W EP2008062210 W EP 2008062210W WO 2009034184 A1 WO2009034184 A1 WO 2009034184A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
rotary snow
snow tiller
rotary
tiller
Prior art date
Application number
PCT/EP2008/062210
Other languages
French (fr)
Inventor
Klaus Wagger
Jan Müller
Original Assignee
Rolic Invest Sarl
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 Rolic Invest Sarl filed Critical Rolic Invest Sarl
Priority to CA2699512A priority Critical patent/CA2699512C/en
Priority to US12/678,012 priority patent/US8312649B2/en
Priority to EP08804171.0A priority patent/EP2203605B1/en
Publication of WO2009034184A1 publication Critical patent/WO2009034184A1/en

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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 present invention relates to a rotary snow tiller for grooming ski slopes.
  • a rotary snow tiller for grooming ski slopes normally advances in a travelling direction, and comprises a frame; and a shaft rotating about an axis transverse to the travelling direction, and having teeth for breaking up the snow surface.
  • a rotary snow tiller for grooming the snow surface of ski slopes and designed to advance in a travelling direction
  • the rotary snow tiller comprising a frame; and a shaft rotating about an axis transverse to the travelling direction, and having teeth for breaking up the snow surface
  • the rotary snow tiller being characterized by comprising at least one further shaft located behind said shaft, rotating about a further axis transverse to the travelling direction, and having further teeth for further breaking up the snow surface .
  • the present invention also relates to a method of operating a rotary snow tiller for grooming ski slopes.
  • a method of operating a rotary snow tiller as claimed in any one of Claims 1 to 14, the method comprising the steps of rotating the shaft about the axis by means of a respective rotary actuator, and rotating the further shaft about the further axis by means of a respective further rotary actuator.
  • Figure 1 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with the present invention
  • Figure 2 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with a variation of the present invention
  • Figure 3 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with a variation of the present invention.
  • BEST MODE FOR CARRYING OUT THE INVENTION Number 1 in Figure 1 indicates as a whole a rotary snow tiller for grooming the snow surface M of ski slopes, and which is towed in direction D by a snow groomer vehicle not shown in the drawings.
  • Rotary snow tiller 1 provides for breaking up a surface portion of snow surface M, and comprises a frame 2; a shaft 3 mounted to rotate with respect to frame 2 about an axis Al, and extending transverse to travelling direction D; a shaft 4 transverse to travelling direction D, located behind shaft 3 in travelling direction D, and mounted to rotate with respect to frame 2 about an axis A2 ; a protective casing 5 surrounding shafts 3 and 4; and a normally flexible mat 6 which is connected to casing 5, extends behind shaft 4, and is drawn over the surface of the tilled snow surface M.
  • Frame 2 comprises a bar 7 parallel to axis Al; a hitch device 8 fixed to bar 7 and for connecting tiller 1 to the snow groomer vehicle (not shown in the drawings) ; two arc-shaped segments 9 fixed to and transverse to bar 7; and plates 10 (only one shown in Figure 1) for supporting shafts 3 and 4 by means of bearings not shown in the drawings .
  • Tiller 1 comprises two adjustable panels 11 which have the purpose to protect, to a certain extent, the tiller 1 from the snow thrown up by the groomer vehicle not shown in the drawings .
  • Shaft 3 comprises a number of teeth 12 equally spaced about and along axis Al, and each of which projects radially from shaft 3 to penetrate snow surface M.
  • the length of shaft 3 defines the work range and the width of tiller 1 as a whole.
  • Shaft 4 comprises a number of teeth 13 equally spaced about and along axis A2, and each of which projects radially from shaft 4 to penetrate snow surface M.
  • the length of shaft 4 substantially equals the length of shaft 3, and defines the work range and the width of tiller 1 as a whole.
  • Casing 5 is substantially defined by a wall 14 which extends beneath arc-shaped segments 9 and surrounds shafts 3 and 4.
  • the casing comprises two housings 15, 16 partly housing respective shafts 3, 4.
  • Teeth 12 and 13 are equal in size and number, and are preferably arranged in a spiral about respective shafts 3 and 4.
  • teeth 12 of shaft 3 are fewer in number than teeth 13 of shaft 4.
  • Teeth 12 of shaft 3 are also shorter in length than teeth 13 of shaft 4.
  • the above features are designed to till a first layer of snow surface M relatively roughly, and to till a second layer, deeper than the first layer, more finely.
  • teeth 12 may be shorter in length than but equal in number to teeth 13; or teeth 12 and 13 may be the same length, but teeth 12 fewer in number than teeth 13.
  • casing 5 comprises a wall 17 forming a single housing 18 housing both shafts 3 and 4.
  • Shafts 3 and 4 are supported movably with respect to frame 2, i.e. can be translated into different relative positions. In the case in point, shafts 3 and 4 are fitted translatably to supporting plates 10.
  • shaft 3 is supported at the ends by blocks 19 (only one shown in Figure 3) each of which have a sliding member 20 engaging a guide 21 which, in the example shown, is a slot parallel to travelling direction D.
  • Sliding member 20 is connected to a respective actuator 22 for adjusting the position of shaft 3.
  • shaft 4 is supported at the ends by blocks 23 (only one shown in Figure 3) which have a sliding member 24 engaging a guide 25 which, in the example shown, is a slot transverse to travelling direction D, and in particular a vertical slot.
  • Sliding member 24 is connected to an actuator 26 for adjusting the position of shaft 4.
  • the relative working depth of the two shafts 3 and 4 can thus be adjusted (the absolute depth is adjusted by known devices for adjusting the position of bar 7 with respect to hitch device 8), and the distance between shafts 3 and 4 can be increased and reduced by adjusting the position of shaft 3, to mesh teeth 12 and 13.
  • Shafts 3 and 4 are rotated operationally by respective rotary actuators 27 and 28, which, in the example shown, are hydraulic.
  • hydraulic actuators 27 and 28 are rotated in the same direction : shafts 3 and 4 are rotated about respective axes Al and A2 in the same direction, preferably clockwise in the attached drawings, so that teeth 12 and 13 penetrate snow surface M in substantially the same direction as travelling direction D.
  • shafts 3 and 4 are rotated at different speeds : preferably, shaft 3 is rotated at a slower speed than shaft 4.
  • shafts 3 and 4 are rotated in opposite directions about respective axes Al and A2.
  • Rotary snow tiller 1 can be configured and operated in different modes to adapt to different characteristics, and provide the best solution for each type, of snow surface M.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Soil Working Implements (AREA)
  • Materials Applied To Surfaces To Minimize Adherence Of Mist Or Water (AREA)

Abstract

A rotary snow tiller (1), for grooming the snow surface (M) of ski slopes and designed to advance in a travelling direction (D), has a frame (2); a shaft (3) rotating about an axis (A1) transverse to the travelling direction (D), and having teeth (12) for breaking up the snow surface (M); a further shaft (4) located behind the shaft (3), rotating about a further axis (A2) transverse to the travelling direction (D), and having further teeth (13) for further breaking up the snow surface (M); and a finish mat (6) located behind the further shaft (4).

Description

ROTARY SNOW TILLER FOR GROOMING SKI SLOPES, AND RELATIVE OPERATING METHOD
TECHNICAL FIELD The present invention relates to a rotary snow tiller for grooming ski slopes.
BACKGROUND ART
A rotary snow tiller for grooming ski slopes normally advances in a travelling direction, and comprises a frame; and a shaft rotating about an axis transverse to the travelling direction, and having teeth for breaking up the snow surface.
Known rotary snow tillers of the above type have proved particularly effective in grooming ski slopes. They are not so effective, however, when deep-down tilling of the snow surface is required, on account of the high energy consumption level involved.
DISCLOSURE OF INVENTION
It is an object of the present invention to provide a rotary snow tiller for grooming ski slopes, designed to eliminate the drawbacks of the known art in a straightforward, low-cost manner, and which in particular provides for excellent grooming of the snow surface in any condition, without consuming an excessive amount of energy.
According to the present invention, there is provided a rotary snow tiller for grooming the snow surface of ski slopes and designed to advance in a travelling direction, the rotary snow tiller comprising a frame; and a shaft rotating about an axis transverse to the travelling direction, and having teeth for breaking up the snow surface; the rotary snow tiller being characterized by comprising at least one further shaft located behind said shaft, rotating about a further axis transverse to the travelling direction, and having further teeth for further breaking up the snow surface . By virtue of the present invention, even deep-down tilling can be performed without consuming an excessive amount of energy.
The present invention also relates to a method of operating a rotary snow tiller for grooming ski slopes. According to the present invention, there is provided a method of operating a rotary snow tiller as claimed in any one of Claims 1 to 14, the method comprising the steps of rotating the shaft about the axis by means of a respective rotary actuator, and rotating the further shaft about the further axis by means of a respective further rotary actuator. BRIEF DESCRIPTION OF THE DRAWINGS
A number of non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings, in which:
Figure 1 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with the present invention; Figure 2 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with a variation of the present invention;
Figure 3 shows a partly sectioned side view, with parts removed for clarity, of a rotary snow tiller in accordance with a variation of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Number 1 in Figure 1 indicates as a whole a rotary snow tiller for grooming the snow surface M of ski slopes, and which is towed in direction D by a snow groomer vehicle not shown in the drawings.
Rotary snow tiller 1 provides for breaking up a surface portion of snow surface M, and comprises a frame 2; a shaft 3 mounted to rotate with respect to frame 2 about an axis Al, and extending transverse to travelling direction D; a shaft 4 transverse to travelling direction D, located behind shaft 3 in travelling direction D, and mounted to rotate with respect to frame 2 about an axis A2 ; a protective casing 5 surrounding shafts 3 and 4; and a normally flexible mat 6 which is connected to casing 5, extends behind shaft 4, and is drawn over the surface of the tilled snow surface M.
Frame 2 comprises a bar 7 parallel to axis Al; a hitch device 8 fixed to bar 7 and for connecting tiller 1 to the snow groomer vehicle (not shown in the drawings) ; two arc-shaped segments 9 fixed to and transverse to bar 7; and plates 10 (only one shown in Figure 1) for supporting shafts 3 and 4 by means of bearings not shown in the drawings .
Tiller 1 comprises two adjustable panels 11 which have the purpose to protect, to a certain extent, the tiller 1 from the snow thrown up by the groomer vehicle not shown in the drawings .
Shaft 3 comprises a number of teeth 12 equally spaced about and along axis Al, and each of which projects radially from shaft 3 to penetrate snow surface M. The length of shaft 3 defines the work range and the width of tiller 1 as a whole.
Shaft 4 comprises a number of teeth 13 equally spaced about and along axis A2, and each of which projects radially from shaft 4 to penetrate snow surface M. The length of shaft 4 substantially equals the length of shaft 3, and defines the work range and the width of tiller 1 as a whole.
Casing 5 is substantially defined by a wall 14 which extends beneath arc-shaped segments 9 and surrounds shafts 3 and 4. In the Figure 1 example, the casing comprises two housings 15, 16 partly housing respective shafts 3, 4.
Teeth 12 and 13 are equal in size and number, and are preferably arranged in a spiral about respective shafts 3 and 4.
In the Figure 2 variation, teeth 12 of shaft 3 are fewer in number than teeth 13 of shaft 4.
Teeth 12 of shaft 3 are also shorter in length than teeth 13 of shaft 4.
The above features are designed to till a first layer of snow surface M relatively roughly, and to till a second layer, deeper than the first layer, more finely.
Other variations are possible. For example : teeth 12 may be shorter in length than but equal in number to teeth 13; or teeth 12 and 13 may be the same length, but teeth 12 fewer in number than teeth 13. In the Figure 3 variation, casing 5 comprises a wall 17 forming a single housing 18 housing both shafts 3 and 4.
Shafts 3 and 4 are supported movably with respect to frame 2, i.e. can be translated into different relative positions. In the case in point, shafts 3 and 4 are fitted translatably to supporting plates 10. In the
Figure 3 example, shaft 3 is supported at the ends by blocks 19 (only one shown in Figure 3) each of which have a sliding member 20 engaging a guide 21 which, in the example shown, is a slot parallel to travelling direction D.
Sliding member 20 is connected to a respective actuator 22 for adjusting the position of shaft 3.
Similarly, shaft 4 is supported at the ends by blocks 23 (only one shown in Figure 3) which have a sliding member 24 engaging a guide 25 which, in the example shown, is a slot transverse to travelling direction D, and in particular a vertical slot. Sliding member 24 is connected to an actuator 26 for adjusting the position of shaft 4.
The relative working depth of the two shafts 3 and 4 can thus be adjusted (the absolute depth is adjusted by known devices for adjusting the position of bar 7 with respect to hitch device 8), and the distance between shafts 3 and 4 can be increased and reduced by adjusting the position of shaft 3, to mesh teeth 12 and 13. Shafts 3 and 4 are rotated operationally by respective rotary actuators 27 and 28, which, in the example shown, are hydraulic. According to the present invention, hydraulic actuators 27 and 28 are rotated in the same direction : shafts 3 and 4 are rotated about respective axes Al and A2 in the same direction, preferably clockwise in the attached drawings, so that teeth 12 and 13 penetrate snow surface M in substantially the same direction as travelling direction D. In one operating mode, shafts 3 and 4 are rotated at different speeds : preferably, shaft 3 is rotated at a slower speed than shaft 4.
In a further operating mode, shafts 3 and 4 are rotated in opposite directions about respective axes Al and A2.
Rotary snow tiller 1 can be configured and operated in different modes to adapt to different characteristics, and provide the best solution for each type, of snow surface M.

Claims

1) A rotary snow tiller for grooming the snow surface (M) of ski slopes and designed to advance in a travelling direction (D), the rotary snow tiller (1) comprising a frame (2); and a shaft (3) rotating about an axis (Al) transverse to the travelling direction (D), and having teeth (12) for breaking up the snow surface (M); the rotary snow tiller (1) being characterized by comprising at least one further shaft (4) located behind said shaft (3), rotating about a further axis (A2) transverse to the travelling direction (D) , and having further teeth (13) for further breaking up the snow surface (M) .
2) A rotary snow tiller as claimed in Claim 1, characterized by comprising a finish mat (6); said further shaft (4) being located between said shaft (3) and said finish mat (4) .
3) A rotary snow tiller as claimed in Claim 1 or 2, characterized in that the further shaft (4) has a number of further teeth (13) greater than the number of teeth (12) of the shaft (3) .
4) A rotary snow tiller as claimed in any one of Claims 1 to 3, characterized in that the further teeth (13) are longer than said teeth (12) .
5) A rotary snow tiller as claimed in any one of Claims 1 to 4, characterized in that the shaft (3) is supported to translate with respect to said frame (2) . 6) A rotary snow tiller as claimed in any one of Claims 1 to 5, characterized in that the further shaft (4) is supported to translate with respect to said frame (2) . 7) A rotary snow tiller as claimed in Claim 5 or 6, characterized in that the shaft (3) is mounted in a block (19) in turn mounted in sliding manner inside a guide (21) associated with said frame (2), to adjust the position of the shaft (3) . 8) A rotary snow tiller as claimed in Claim 7, characterized in that said guide (21) is horizontal.
9) A rotary snow tiller as claimed in Claim 6 or 7, characterized by comprising an actuator (22) connected to said block (19) to adjust the position of the shaft (3) .
10) A rotary snow tiller as claimed in any one of Claims 6 to 9, characterized in that the further shaft
(4) is mounted in a further block (23) in turn mounted in sliding manner inside a further guide (25) associated with said frame (2), to adjust the position of the further shaft (4) .
11) A rotary snow tiller as claimed in Claim 9, characterized in that said further guide (25) is vertical . 12) A rotary snow tiller as claimed in Claim 11, characterized by comprising a further actuator (26) to adjust the position of the further shaft (4) .
13) A rotary snow tiller as claimed in any one of the foregoing Claims, characterized by comprising a casing (5) over the shaft (3) and the further shaft (4); the casing (5) forming a housing (15) for partly housing the shaft (3), and a further housing (16) adjacent to the housing (15) and for partly housing the further shaft (4) .
14) A rotary snow tiller as claimed in any one of Claims 1 to 12, characterized by comprising a casing (5) over the shaft (3) and the further shaft (4); the casing (5) forming a single housing (18) for partly housing the shaft (3) and the further shaft (4) .
15) A method of operating a rotary snow tiller as claimed in any one of Claims 1 to 14, the method comprising the steps of rotating the shaft (3) about the axis (Al) by means of a respective rotary actuator (27), and rotating the further shaft (4) about the further axis (A2) by means of a respective further rotary actuator (28) .
16) A method as claimed in Claim 15, characterized by rotating the shaft (3) and the further shaft (4) in the same direction.
17) A method as claimed in Claim 15, characterized by rotating the shaft (3) and the further shaft (4) in different directions. 18) A method as claimed in one of Claims 15 to 17, characterized by rotating the shaft (3) and the further shaft (4) at different respective speeds.
PCT/EP2008/062210 2007-09-14 2008-09-12 Rotary snow tiller for grooming ski slopes, and relative operating method WO2009034184A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA2699512A CA2699512C (en) 2007-09-14 2008-09-12 Rotary snow tiller for grooming ski slopes, and relative operating method
US12/678,012 US8312649B2 (en) 2007-09-14 2008-09-12 Rotary snow tiller for grooming ski slopes and relative operating method
EP08804171.0A EP2203605B1 (en) 2007-09-14 2008-09-12 Rotary snow tiller for grooming ski slopes and relative operating method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2007A001775 2007-09-14
IT001775A ITMI20071775A1 (en) 2007-09-14 2007-09-14 ROLLING SNOW MILL FOR THE PREPARATION OF THE SNOWY COAT OF SKI SLOPES AND METHOD OF OPERATION OF THE SAME

Publications (1)

Publication Number Publication Date
WO2009034184A1 true WO2009034184A1 (en) 2009-03-19

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PCT/EP2008/062210 WO2009034184A1 (en) 2007-09-14 2008-09-12 Rotary snow tiller for grooming ski slopes, and relative operating method

Country Status (5)

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US (1) US8312649B2 (en)
EP (1) EP2203605B1 (en)
CA (1) CA2699512C (en)
IT (1) ITMI20071775A1 (en)
WO (1) WO2009034184A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012014053A2 (en) 2010-07-28 2012-02-02 Rolic Invest S.Ar.L Ski slope snow grooming method and relative implement
DE102020210112A1 (en) 2020-08-10 2022-02-10 Kässbohrer Geländefahrzeug Aktiengesellschaft Rear attachment for a snow groomer and snow groomer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800003000A1 (en) * 2018-02-23 2019-08-23 Prinoth Spa SNOW BLOWER AND RELEVANT ADJUSTMENT METHOD
CA214952S (en) * 2021-12-29 2024-05-06 Prinoth Spa Tooth for snow tiller
USD1040865S1 (en) * 2024-03-20 2024-09-03 Wilburn B. Lancaster Lawn mower shroud openings

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534252A1 (en) * 1965-09-22 1970-03-19 Giulio Fresia Device for compressing the ski slopes and pulling a skiing operator
JPH02139914U (en) * 1989-04-24 1990-11-22
CA2120207A1 (en) * 1994-06-17 1995-12-18 Christopher Lawrence Milburn Tracula
DE29600905U1 (en) * 1995-01-19 1996-05-15 Kaessbohrer Geländefahrzeug GmbH, 89250 Senden Snow groomer
US20030159840A1 (en) * 2002-02-28 2003-08-28 Anthony Schmidt Power groomer for snow & earth terrain
AT500034A1 (en) * 1999-09-27 2005-10-15 Riepler Bernhard Ing REFILLING OR BZW. MILLING DEVICE AND METHOD FOR PREPARING PISTS

Family Cites Families (2)

* Cited by examiner, † Cited by third party
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
US6671983B2 (en) * 1998-08-14 2004-01-06 Board Of Control Of Michigan Technological University Snow groomer assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1534252A1 (en) * 1965-09-22 1970-03-19 Giulio Fresia Device for compressing the ski slopes and pulling a skiing operator
JPH02139914U (en) * 1989-04-24 1990-11-22
CA2120207A1 (en) * 1994-06-17 1995-12-18 Christopher Lawrence Milburn Tracula
DE29600905U1 (en) * 1995-01-19 1996-05-15 Kaessbohrer Geländefahrzeug GmbH, 89250 Senden Snow groomer
AT500034A1 (en) * 1999-09-27 2005-10-15 Riepler Bernhard Ing REFILLING OR BZW. MILLING DEVICE AND METHOD FOR PREPARING PISTS
US20030159840A1 (en) * 2002-02-28 2003-08-28 Anthony Schmidt Power groomer for snow & earth terrain

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012014053A2 (en) 2010-07-28 2012-02-02 Rolic Invest S.Ar.L Ski slope snow grooming method and relative implement
DE102020210112A1 (en) 2020-08-10 2022-02-10 Kässbohrer Geländefahrzeug Aktiengesellschaft Rear attachment for a snow groomer and snow groomer
EP3954829A1 (en) * 2020-08-10 2022-02-16 Kässbohrer Geländefahrzeug AG Backmounted device for a piste groomer and piste groomer
EP3954829B1 (en) 2020-08-10 2023-08-02 Kässbohrer Geländefahrzeug AG Backmounted device for a piste groomer and piste groomer

Also Published As

Publication number Publication date
ITMI20071775A1 (en) 2009-03-15
EP2203605B1 (en) 2016-03-16
CA2699512C (en) 2016-04-05
US8312649B2 (en) 2012-11-20
US20110005106A1 (en) 2011-01-13
EP2203605A1 (en) 2010-07-07
CA2699512A1 (en) 2009-03-19

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