WO1997031158A1

WO1997031158A1 - Piste milling device

Info

Publication number: WO1997031158A1
Application number: PCT/EP1996/005475
Authority: WO
Inventors: Helmut Kanzler; Gerd Friedmann
Original assignee: Kässbohrer Geländefahrzeug Gmbh
Priority date: 1996-02-20
Filing date: 1996-12-06
Publication date: 1997-08-28
Also published as: NO983681L; DE29602941U1; NO983681D0; EP0882160A1

Abstract

The invention relates to a piste milling device which has a milling frame (2) for attachment to a piste machine. At least one milling shaft (4) having at least one milling member (3) is rotatably mounted on the milling frame (2). To prevent the milling shaft (4) from being damaged and/or driven by obstacles on the piste as far as possible, and at the same time to facilitate maintenance of the piste milling device, said milling shaft (4) has at least one milling member (3) on one lower end section facing a piste surface and is mounted on the milling frame (2) to be rotatable above the lower end section.

Description

Snow groomer

The invention relates to a slope milling device with a milling frame for attaching a snow groomer, wherein a milling frame is rotatably mounted at least one milling shaft having at least one milling element.

In such a runway milling device known from G9217472, the milling shaft is rotatably mounted on a milling frame essentially around a horizontal axis of rotation at both ends. A number of milling elements protrude radially from the milling shaft, which can be arranged, for example, in a spiral along the milling shaft. Furthermore, the runway milling device can have, for example, two milling shafts next to one another, which are connected to a drive at their ends pointing away from one another and to a through drive at their ends facing one another.

In such a runway milling device, the drives for the milling shaft are arranged essentially on the side surfaces of the milling frame. They can protrude laterally over the milling frame. If the slope milling device is moved by a snow groomer over a corresponding slope, the drives can be damaged by contact with obstacles on the slope or by contact with a snow groomer running in parallel. Furthermore, drives and milling shafts in the previously known runway milling device are relatively difficult to access for maintenance tasks or the like, since they are arranged relatively close to the runway in the milling frame.

The invention is therefore based on the object of improving the known runway milling device to such an extent that damage to the milling shaft and / or drive of the milling shaft by obstacles on the slope is largely ruled out and at the same time the ease of maintenance of the piste milling device is improved. This object is achieved in a slope milling device with the feature of the preamble of claim 1 in that the milling shaft has at least one milling element on a lower end section facing a slope surface and is rotatably mounted on the frame above the lower end section.

As a result, only the lower end section faces the slope surface, while the rest of the milling shaft and an associated drive are mounted or arranged above this lower end section on the milling frame. In this way, the accessibility of the drive and milling shaft is improved. In addition, the drive is not damaged in the event of contact or collision of the outer ends of the milling frame with obstacles on the runway or on the edge of the runway.

The milling shaft is preferably rotatably mounted about an essentially vertical axis of rotation or about an axis of rotation inclined to the vertical. In both cases, the milling shaft with the milling element essentially forms a rotor, which loosens snow on the slope with its milling element and mixes it with, for example, fresh snow. The milling shaft can be stored in its upper end section.

In the case of an inclined axis of rotation, it proves advantageous in this context if the axis of rotation is inclined forwards or backwards in the direction of travel of the piste milling device or of the piste vehicle with an inclination angle of preferably £ 45 °. With a corresponding inclination of the axis of rotation to the front, the corresponding milling element is pressed into the surface of the slope by the movement of the slope milling device, so that less driving force is required for the milling shaft. This is particularly advantageous if the slope surface is relatively hard. With softer slope surfaces, the axis of rotation can also be tilted backwards. In order to equip the slope milling device with a larger working width, a number of milling shafts are arranged next to one another in the longitudinal direction and / or in the transverse direction of the slope milling device. The inclination of the individual axes of rotation can be different, as a result of which, for example, a different displacement of the milled parts of the slope surface can be achieved. In addition, the milling elements can be designed differently on the milling shafts arranged next to one another.

In this context, it is easiest to arrange the milling shafts in the transverse direction in at least two rows offset from one another in the longitudinal direction. For example, the milling shafts arranged in the longitudinal direction in the rear row can more finely crumble the snow roughly crushed by the milling shafts of the front row. Accordingly, the milling elements or milling tools can be designed differently.

It is also advantageous if the milling shafts of two rows adjacent in the longitudinal direction are arranged on a gap. As a result, the snow shifted laterally to the direction of travel by the milling shafts of the front row is better fed to the milling shafts of the rear row.

The milling shafts of each row can be turned in different directions. For example, the direction of rotation can change from one milling shaft to another along a row. Furthermore, for example, the outermost milling shafts can rotate in the opposite direction to the milling shafts lying between them.

In order to simplify the drive as a whole, the milling shafts of a row can be rotated in the same direction of rotation.

Depending on the nature of the slope surface, to enable optimal loosening and reprocessing of the slope, each milling shaft can be vertically adjustable and / or pivotable about a horizontal axis. Due to the vertical adjustability, the working depth of the milling element can be adjusted. By pivoting the milling shaft, for example, the distance between milling shafts in adjacent rows can be set.

In order, for example, to be able to set their rotational speeds independently of one another within a row of milling shafts, an individual drive can be assigned to each milling shaft. In this way, the milling shafts arranged in the middle of each row can rotate faster or slower than the milling shafts arranged at the ends of the corresponding row. It is also possible to

To change the speed of rotation gradually towards the middle or towards the ends of each row.

In order to make do with a smaller number of drives, which reduces maintenance work and costs, a compound drive can be assigned to a number of milling shafts for their common drive. In the simplest case, such a compound drive is assigned to the milling shafts with the same direction of rotation. A speed gradation of the milling shafts is nevertheless possible if, for example, appropriate gear ratios or gear ratios are formed between the composite drive and the milling shafts. It is also possible to provide a drive motor for all milling shafts even with different directions of rotation.

In order to achieve an improved loosening of the slope surface during one revolution of a milling shaft, an arrangement of the milling elements, for example, is arranged in pairs opposite one another in the lower end section of the milling shaft. Likewise, three, four or more milling elements can be arranged on the milling shaft. The milling elements can also be arranged in different height positions on the milling shaft. A simple exemplary embodiment of a milling element is characterized in that it is essentially reversely L-shaped, a first L-leg projecting essentially radially from the milling shaft and a second L-leg essentially parallel to the milling shaft in the direction of the slope surface. In this case, if the milling elements are arranged in pairs, the lower end section of the milling shaft is approximately fork-shaped. Both forks serve as milling elements and can intervene in the slope surface.

In the simplest case, the milling elements are arranged directly at the lower end of the milling shaft, so that the first L-leg protrudes laterally from this lower end. It is also possible, for example, to arrange two pairs of milling elements at different heights and offset from one another on the lower end section of the milling shaft.

If the rotational speeds of the milling shafts are coordinated with one another accordingly, it proves to be advantageous if milling elements of at least next-adjacent milling shafts interlock when they rotate. This means that the milling elements of one milling shaft precisely engage in the gaps between the milling elements of the adjacent milling shaft during their rotation. In this way, a particularly fine crumbling and loosening of the slope surface is achieved.

A releasable attachment of a smoothing device, such as a finisher, to the rear of the milling frame is advantageous in order to level and compact the finely crumbled and loosened snow on the slope surface to restore a flat slope surface. Instead of a finisher, a smoothing roller or the like can also be used, for example.

In order to at least roughly tear open the slope surface before the milling elements engage, a slope tear-open device can be adjustably mounted on a front side of the milling frame between a ready position and a working position. Such a piste ripping device is known for example from DE 29500818. The piste ripping device can comprise corresponding ripping teeth rotatably mounted on a shaft or a toothed strip arranged at one end of a bearing arm, upper ends of the bearing arm being pivotably mounted on the milling frame. Furthermore, the piste ripping device can have a notching device, by means of which the toothed strip is released for pivoting it in the direction of travel backwards about a pivot bearing on the bearing arm.

With this arrangement of the ripping device, milling shafts and smoothing device, the slope is first torn open, ventilated and mixed old and new snow by the piste ripping device. Subsequently, the chunks similar to rotor with milling elements are used to finely crumble and level the chunks, some of which are still roughly chopped up by the piste ripper, with the subsequent smoothing device brushing the snow thus prepared into a compacted piste surface.

For further variation of the rotor-like milling shafts with milling elements, the milling elements can be adjustable in their working depth and / or their inclination relative to the milling shaft. To simplify the exchange of damaged or worn milling elements, they can be detachably attached to the milling shaft. Further possible variations result from different lengths and / or widths and / or shapes of the milling elements both on a milling shaft and in comparison to milling elements of adjacent milling shafts. For example, it can be advantageous if the milling elements run in a cutting shape at their front edge in the direction of rotation, so that crushing and milling the slope surface is facilitated. In addition, for example, the milling elements of a rear row of milling shafts rearward in the direction of travel can be designed with a greater length in order to engage more deeply in the slope surface loosened by the milling elements of the front row of milling shafts.

As with the previously known slope device with horizontally arranged milling shafts, the slope milling device according to the invention can also have, for example, a number of subunits which are arranged next to one another, in front of one another or offset from one another. Each subunit has a number of milling shafts with corresponding milling elements. The subunits can, for example, be suspended from a superordinate frame of the runway milling device.

The superordinate frame of the runway milling device or the milling frame of each subunit can appropriately have a shape formed from a steel construction, aluminum profile construction or from composite materials such as plastics.

An advantageous exemplary embodiment of the invention is explained and described in more detail below with reference to the figures enclosed in the drawing.

Show it:

Fig. L is a basic side view of a slope milling device, and FIG. 2 shows a top view of the slope milling device according to FIG. 1.

1 shows a side view of a piste milling device 1 according to the invention. For the sake of simplicity, a corresponding snow groomer and a connecting frame for attaching the snow groomer to this vehicle are not shown.

The runway milling device 1 has a milling frame 2 which has a substantially horizontally extending part and a part which adjoins the latter in the direction of travel 9 and is inclined obliquely downwards and backwards. In the horizontal part of the milling frame 2, milling shafts 4 are rotatably mounted. Each of the milling shafts 4 has two opposite milling elements 3 in its lower end section 5. These are essentially inverted L-shaped, with a first L-leg 19 projecting approximately radially from the lower end 30 of the milling shaft 4 and the adjoining second L-leg 20 running approximately parallel to the vertical axis of rotation 7 of the milling shaft 4.

An individual drive 18, which is arranged on the top of the milling frame 2, is assigned to each milling shaft in an upper end section. Instead of the milling shafts with vertical axis of rotation 7, inclined axes of rotation 8, which are inclined by an angle of inclination 10 with respect to a vertical or vertical axis of rotation 7, can be used, as shown in broken lines in FIG. 1. 1, milling shafts 4 can be rotated about the inclined axes of rotation 8 in another exemplary embodiment.

The milling elements 3 according to FIG. 1 are of identical design with regard to their shape, length 32 of the second L-legs 20, length of the first L-legs 19, width or thickness of the L-legs 19 or 20. The lower ends of the second L-leg engage in a slope surface 6, on which a smoothing device 22 rests on the rear side 21 of the milling frame 2.

The milling shafts 4 located at the front in the direction of travel 9 rotate in the direction of rotation 15, that is to say in the counter-clockwise direction in the exemplary embodiment shown. In the opposite direction of rotation 16, that is to say in the clockwise direction, the rear milling shafts 4 rotate in the direction of travel 9.

On a front side 23 of the milling frame 2, a piste ripping device 24 is adjustably mounted between a ready position 25 indicated by dashed lines and the fully illustrated working position 26. The piste ripping device 24 comprises a bearing arm 27 and a toothed strip 28 arranged at its lower end 31. An upper end 29 of the bearing arm 27 is pivotably mounted on the front side 23 of the milling frame 2.

FIG. 2 shows a top view of the slope milling device according to FIG. 1. A number of milling shafts 4 with milling elements 3, see also FIG. 1, are arranged in a first front row 13 in the transverse direction 12 of the runway milling device 1 or in the horizontal direction 17. A second rear row 14 with further milling shafts 4 and milling elements 3 is arranged further back in the direction of travel 9 or in the longitudinal direction 11 of the runway milling device 1. The first row 13 has three milling shafts and the second row 14 has four milling shafts. The milling shafts of the two rows are arranged in a gap, the milling shafts 4 with milling elements 3 of the first row 13 and the second row 14 being partially inserted into the gaps between the milling shafts 4 with milling elements 3 of the respective other rows 14 and 13.

The milling shafts 4 of the first row 13 all rotate in the same direction of rotation 15, that is to say counterclockwise. The Auger shafts ⁴ of the second row 14 to rotate in all dersel _b s 16 direction of rotation, i.e. clockwise.

The auger shafts of both the first and the second row ³ 1, 14 all have a vertical axis of rotation. 7

On the front 23 of the milling frame 2, the piste ripping device 24 is shown in a top view. The associated toothed strip 28 extends essentially over the same working width as that of the milling shafts arranged in the two rows 1 ₃ and 14. Which is arranged on the rear side of the miller frame 2 smoothness device 22 has demgegenü he ^b a larger working width.

To ^d s ^S nits 34 and 35 of the miller frame 2 can ^b eispielsweise side skirts be arranged that erlagerung a ^V of snow or the like ren verhin ^d by the cutting elements on the working width of the smoothness device 22 also. ^W can eiterhin in the rear side 21, see for example, a rear opening its Fig. 1, of the miller frame 2 is present, can escape through the chnee l below the cutter frame 2 too much accumulated ^S or the like to the rear from the Pistenfräsvorrichtung.

It is pointed out that the piste milling device 1 according to the invention can also be constructed from a plurality of subunits analogous to FIGS. 1 and 2. These sub-units also have milling frames ₂ , milling elements ₃ , milling shafts ⁴ and the like. Each subunit can be attached to a frame of the übergeor ^d Neten Pistenfräsvorrichtung. 1 For example, each subunit can be obtained by its own context to the parent context commute be mounted _d. The overarching framework is used to to _b au _t he entire Pistenfräsvorrichtung to a groomer.

Claims

Protection claims

1. runway milling device (1) with a milling frame (2) for attachment to a snow groomer, wherein on the milling frame (2) at least one at least one milling element (3) having milling shaft (4) is rotatably mounted, characterized in that the milling shaft (4) has at least one milling element (3) on a lower end section (5) facing a slope surface (6) and is rotatably mounted on the milling frame (2) above the lower end section.

2. Pistenfräsvorrichtung according to claim 1, characterized in that the milling shaft (4) about a substantially vertical axis of rotation (7) or about an inclined to the vertical axis of rotation (8) is rotatably mounted.

3. slope milling device according to claim 1 or 2, characterized in that the axis of rotation (8) in the direction of travel (9) of the slope milling device (1) or the snow groomer is inclined forward or backward with an inclination angle (10) of preferably <45 °.

4. slope milling device according to at least one of the preceding claims, characterized in that a number of milling shafts (4) in the longitudinal direction (11) and / or in the transverse direction (12) of the slope milling device (1) are arranged side by side.

5. slope milling device according to at least one of the preceding claims, characterized in that the milling shafts (4) in the transverse direction (12) in at least two mutually in the longitudinal direction (11) offset rows (13, 14) are arranged.

6. Piste milling device according to at least one of the preceding claims, characterized in that milling shafts (4) of adjacent rows (13, 14) are arranged on a gap.

7. slope milling device according to at least one of the preceding claims, characterized in that the milling shafts (4) of a row (13, 14) in the same direction of rotation (15, 16) are rotatable.

8. Piste milling device according to at least one of the preceding claims, characterized in that the milling shaft (4) is vertically adjustable and / or pivotable about a horizontal axis (17).

9. slope milling device according to at least one of the preceding claims, characterized in that each milling shaft (4) is assigned an individual drive (18).

10. slope milling device according to at least one of the preceding claims, characterized in that a number of milling shafts (4) is associated with a compound drive.

11. Piste milling device according to at least one of the preceding claims, characterized in that the milling elements (3) are arranged in pairs opposite one another in the lower end section (5) of the milling shaft (3).

12. Piste milling device according to at least one of the preceding claims, characterized in that the milling element (3) is essentially inverted L-shaped, a first L-leg (19) projecting radially from the milling shaft (4) and a second L -Leg (20) runs essentially parallel to the milling shaft (4) in the direction of the slope surface (6).

13. piste milling device according to at least one of the preceding claims, characterized in that the first L-leg (19) protrudes laterally at the lower end (30) of the milling shaft (4).

14. Piste milling device according to at least one of the preceding claims, characterized in that the milling elements (3) at least next-adjacent milling shafts (4) interlock when they rotate.

15. slope milling device according to at least one of the preceding claims, characterized in that on a rear side (21) of the milling frame (2) a smoothing device (22), such as a finisher, is releasably attached.

16. Piste milling device according to at least one of the preceding claims, characterized in that on a front side (23) of the milling frame (2) a piste ripping device (24) is adjustably mounted between a standby position (25) and a working position (26).

17. slope milling device according to at least one of the preceding claims, characterized in that the milling element (3) in its working depth and / or its inclination relative to the milling shaft (4) is adjustable.

18. Piste milling device according to at least one of the preceding claims, characterized in that the milling element (3) on the milling shaft (4) is releasably attached.

19. Piste milling device according to at least one of the preceding claims, characterized in that milling elements (3) of a milling shaft (4) have different lengths and / or widths and / or shapes.

20. Piste milling device according to at least one of the preceding claims, characterized in that the piste milling device (1) has a number of subunits which are arranged side by side and / or in front of one another and / or offset from one another in the direction of travel (9).