EP0242437A2 - Procédé pour régler la profondeur de pénétration d'un outil de traitement des pistes de ski et véhicule de piste remplissant cette fonction - Google Patents

Procédé pour régler la profondeur de pénétration d'un outil de traitement des pistes de ski et véhicule de piste remplissant cette fonction Download PDF

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Publication number
EP0242437A2
EP0242437A2 EP86115445A EP86115445A EP0242437A2 EP 0242437 A2 EP0242437 A2 EP 0242437A2 EP 86115445 A EP86115445 A EP 86115445A EP 86115445 A EP86115445 A EP 86115445A EP 0242437 A2 EP0242437 A2 EP 0242437A2
Authority
EP
European Patent Office
Prior art keywords
snow
drive
snow groomer
grooming tool
power requirement
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.)
Withdrawn
Application number
EP86115445A
Other languages
German (de)
English (en)
Other versions
EP0242437A3 (fr
Inventor
Hans Dieter Zambelli
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.)
Karl Kaessbohrer Fahrzeugwerke GmbH
Original Assignee
Karl Kaessbohrer Fahrzeugwerke GmbH
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 Karl Kaessbohrer Fahrzeugwerke GmbH filed Critical Karl Kaessbohrer Fahrzeugwerke GmbH
Publication of EP0242437A2 publication Critical patent/EP0242437A2/fr
Publication of EP0242437A3 publication Critical patent/EP0242437A3/fr
Withdrawn legal-status Critical Current

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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 method for adjusting the immersion depth of a height-adjustable snow grooming tool mounted on a self-propelled snow groomer and a snow groomer with snow grooming tool and a hydrostatic drive driving the same for carrying out the method.
  • the depth of immersion in the snow is carried out using the height adjustment.
  • the height adjustment causes the height of the support frame of the snow grooming tool to be adjusted relative to the snow groomer, which, for example, also adjusts the depth of the snow blower. This adjustment is carried out by hand.
  • the piste grooming tool plunges too deep or not deep enough into the snow.
  • snow blowers mounted on the rear of a snow groomer for example, it can be observed that they plunge too deep into the snow when the snow groomer is ascending, while they do not plunge deep enough into the snow when the snow groomer descends.
  • the milling shaft is lifted slightly when driving uphill, while it is to be immersed more strongly when driving downhill.
  • the invention is therefore based on the object of providing a method and a snow groomer with a snow grooming tool for carrying out the method in which the immersion depth of the snow grooming tool adapts to the driving conditions of the snow groomer in a desired manner, depending on whether the snow groomer is driving downhill or uphill.
  • this object is achieved in that the piste grooming tool is automatically raised depending on the power requirement of the vehicle drive when the power requirement of the drive increases, and is automatically immersed deeper when the power requirement of the drive decreases.
  • This solution achieves in a particularly simple manner that the piste grooming tool is slightly raised when driving uphill, since then the power requirement of the vehicle drive increases, and is immersed deeper when driving downhill, since in this case the power requirement of the vehicle drive decreases.
  • the particular advantage in linking the power requirement for the vehicle drive with the adjustment of the immersion depth of the snow grooming tool is that most snow groomers already have a hydraulic drive and that the height adjustment of the snow grooming tool is usually effected hydraulically.
  • the snow blower can adapt even better to the driving conditions. If the snow groomer runs over an ice hump, for example, the power requirement of the milling shaft increases particularly sharply. By lifting the snow blower, overloading or even a standstill of the milling shaft can be avoided. If the power requirement is reduced by lifting the milling shaft, the snow blower is automatically submerged again. In this way, an automatic adjustment of the immersion depth of the snow blower to the driving conditions and the condition of the slopes is always achieved. The driver of the snow groomer is greatly relieved in this way; moreover, a more or less arbitrary adjustment of the immersion depth of the milling machine by the driver is avoided.
  • the object is achieved in that a hydraulic cylinder pressure-connected to the hydrostatic drive is provided to adjust the immersion depth of the snow grooming tool, which raises the snow grooming tool when the pressure in the hydrostatic drive increases and dips deeper when the pressure drops. Since hydrostatic drives are used in the usual snow grooming tools, a direct link between the power requirement of the drive and the immersion depth of the snow grooming tool can be achieved in this way.
  • the hydraulic cylinder can be designed particularly advantageously as a differential cylinder with a large and a small pressure piston surface, the two connections of the differential cylinder being connected to the hydrostatic drive.
  • the differential force increases in the differential cylinder, which causes the slope grooming tool to be lifted.
  • a throttle valve is connected in parallel with the two connections of the differential cylinder. In this way, particularly short pressure increases in the hydrostatic drive can be damped, so that the slope grooming tool does not have to perform any jerky movements.
  • This throttle valve can be designed to be adjustable. It is particularly expedient if a check valve is connected in parallel with the throttle valve and blocks a flow from the connection assigned to the larger pressure piston surface to the connection assigned to the smaller pressure piston surface. This can cause a sudden increase in pressure in the hydrostatic drive to immediately raise the piste grooming tool. In the event of a sudden drop in pressure, on the other hand, the hydraulic fluid only has to force its way through the throttle valve, so that the renewed immersion of the piste grooming tool takes place significantly more slowly than lifting.
  • the throttle valve is arranged between the hydraulic drive and the connection assigned to the larger pressure piston surface.
  • the piste grooming tool designed as a rear-mounted tiller is connected to the snow groomer via a height-adjustable support frame, which comprises two frame parts arranged one behind the other in the direction of travel and pivotally connected to one another about a horizontal axis, the hydraulic cylinder being connected to both frame parts such that an off - or retracting the hydraulic cylinder a pivoting movement of the Frame parts and thus raising or lowering the router.
  • a height-adjustable support frame which comprises two frame parts arranged one behind the other in the direction of travel and pivotally connected to one another about a horizontal axis, the hydraulic cylinder being connected to both frame parts such that an off - or retracting the hydraulic cylinder a pivoting movement of the Frame parts and thus raising or lowering the router.
  • the hydraulic cylinder is arranged at a distance above the frame parts and is connected to these in each case via link bearings.
  • At least one articulation bearing has a plurality of articulation connections in such a way that different lifts of the hydraulic cylinder are assigned to the milling machine for the same lifting and lowering paths. This enables a basic setting to be specified by connecting the hydraulic cylinder to a specific articulation, so that the pressure change in the hydrostatic drive causes a more or less strong adjustment to the immersion depth to the driving conditions or terrain.
  • the snow blower comprises a support frame 3 which consists of two frame parts 4 and 5.
  • the frame part 4 is vertically adjustable connected to the rear 1 of the snow groomer.
  • the frame part 5 is rigidly attached to a cutter housing 6.
  • Both frame parts 4 and 5 are pivotally connected to one another in the vertical by means of a joint 7.
  • a milling shaft 8 arranged transversely to the direction of travel A is rotatably fastened in the milling housing 6.
  • the milling shaft 8 is set in rotation by a hydraulic drive (not shown in FIG. 1).
  • a support edge 9 is provided which extends over the entire width of the snow blower 2 and on which the snow blower is supported on the snow.
  • Articulated bearings 10 and 11 for a hydraulic cylinder 12 are fastened both on the frame part 4 and on the frame part 5.
  • the hinge bearing 10 on the frame part 4 is simply designed as an upwardly directed hinge bracket with a connection.
  • the articulation bearing 11 attached to the frame part 5 comprises a rocker 13 with a plurality of connection points 14 arranged one above the other and a triangular abutment 15 arranged in front of it in the direction of travel, which is fixedly attached to the frame part 5, projects upwards from there and on which the rocker 13 can support.
  • the rocker 13 itself is also pivotally mounted in the joint 7, in which the two frame parts 4 and 5 are also mounted. With the hydraulic cylinder 12 extended the rocker 13 rests on the abutment 15 of the frame part 5 when the support edge 9 of the snow blower 2 touches the ground.
  • FIG. 2 shows the hydraulic connection of the hydraulic cylinder 12 with the hydraulic system for the hydrostatic drive in a schematic manner.
  • the hydrostatic drive 16 is shown schematically with a block.
  • the hydrostatic drive 16 can be used both for the driving drive of the snow groomer and for the rotation of the milling shaft 8.
  • the pressure in the hydrostatic drive 16 increases.
  • the pressures are between 50 and 420 bar.
  • a line 17 leads from the hydrostatic drive to the hydraulic cylinder 12.
  • the line 17 branches into a line 18 which leads directly to a connection 19 of the hydraulic cylinder 12 and a line 20 which leads to a connection 21 at the opposite end of the hydraulic cylinder 12 leads.
  • the hydraulic cylinder 12 is designed as a differential cylinder, which means that the hydraulic cylinder has a pressure piston 22 with different pressure application surfaces 23 and 24, respectively.
  • the pressure application surface 23, which faces the connection 21, is larger than the pressure application surface 24, which faces the connection 19 and to which a piston rod 25 is attached, which causes the reduction of the pressure application surface 24.
  • a controllable throttle valve 26 is arranged in line 20 between the connection 21 of the hydraulic cylinder 12 and the branching of the line 17th .
  • a check valve 27 is connected, which in a blocking position prevents the flow from the connection 21 in the direction of connection 19 or in the direction of the hydrostatic drive 16.
  • a flow from the hydrostatic drive 16 to the connection 21 is not hindered.
  • the hydraulic cylinder 12 is connected on the one hand to the link bearing 10 on the frame part 4 and on the other hand with its piston rod 25 to the rocker 13 of the link bearing 11 on the frame part 5. If the pressure increases in the hydrostatic drive, the piston rod 25 shifts to the right due to the differently sized pressure application surfaces 23 and 24, as a result of which the rocker 13 is pressed against the abutment of the articulation bearing 11. Since the snow blower 2 is supported on the ground with its supporting edge 9, the support frame bends upward at its joint, as a result of which the milling shaft 8 lifts upward in the direction of arrow 0.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Of Streets, Tracks, Or Beaches (AREA)
  • Operation Control Of Excavators (AREA)
  • Road Paving Machines (AREA)
  • Road Repair (AREA)
EP86115445A 1986-04-17 1986-11-07 Procédé pour régler la profondeur de pénétration d'un outil de traitement des pistes de ski et véhicule de piste remplissant cette fonction Withdrawn EP0242437A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3613034 1986-04-17
DE19863613034 DE3613034A1 (de) 1986-04-17 1986-04-17 Verfahren zur verstellung der eintauchtiefe eines pistenpflegewerkzeuges und zugehoeriges pistenfahrzeug

Publications (2)

Publication Number Publication Date
EP0242437A2 true EP0242437A2 (fr) 1987-10-28
EP0242437A3 EP0242437A3 (fr) 1988-06-08

Family

ID=6298932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115445A Withdrawn EP0242437A3 (fr) 1986-04-17 1986-11-07 Procédé pour régler la profondeur de pénétration d'un outil de traitement des pistes de ski et véhicule de piste remplissant cette fonction

Country Status (4)

Country Link
EP (1) EP0242437A3 (fr)
JP (1) JPS62244905A (fr)
DE (1) DE3613034A1 (fr)
YU (1) YU144086A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637134B2 (en) * 2001-03-30 2003-10-28 Prinoth Gmbh Srl Snow track preparation machine with mill mounted in a revolving manner
DE10253412A1 (de) * 2002-11-08 2004-05-27 Kässbohrer Geländefahrzeug AG Verfahren zur Steuerung eines Pistenpflegefahrzeugs und Pistenpflegefahrzeug

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10045524B4 (de) * 2000-09-13 2004-05-27 Kässbohrer Geländefahrzeug AG Pistenpflegevorrichtung, Pistenpflegefahrzeug und Verfahren zum Betreiben einer Pistenpflegevorrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1099775B (de) * 1959-10-24 1961-02-16 Steyr Daimler Puch Ag Einrichtung zur Tiefensteuerung von an Schleppern mit Hubwerk und Aushebegestaenge angebauten landwirtschaftlichen Bodenbearbeitungsgeraeten
FR1376185A (fr) * 1963-12-02 1964-10-23 Int Harvester Co Transmission hydraulique de commande de la traction
IT1062806B (it) * 1976-01-14 1985-02-11 O M A N Officina Macchine E At Veicolo battipista
DE3333941A1 (de) * 1983-09-20 1985-04-04 Karl Kässbohrer Fahrzeugwerke GmbH, 7900 Ulm Fraese

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6637134B2 (en) * 2001-03-30 2003-10-28 Prinoth Gmbh Srl Snow track preparation machine with mill mounted in a revolving manner
DE10253412A1 (de) * 2002-11-08 2004-05-27 Kässbohrer Geländefahrzeug AG Verfahren zur Steuerung eines Pistenpflegefahrzeugs und Pistenpflegefahrzeug
US7299569B2 (en) 2002-11-08 2007-11-27 Kaessbohrer Gelaendefahrzeug Ag Snow-trail grooming vehicle and method for controlling same

Also Published As

Publication number Publication date
JPS62244905A (ja) 1987-10-26
DE3613034A1 (de) 1987-10-22
YU144086A (en) 1988-04-30
EP0242437A3 (fr) 1988-06-08

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