Apparatus for making a cross-country ski run

Abstract

An apparatus configured to make ski runs comprising a support structure; a first tiller; at least one tracksetting device; and a connection structure that couples the tracksetting device to the first tiller; the connection structure being configured to allow the free rotation about an axis, such as transverse to the advancing direction, of the tracksetting device with respect to the tiller.

Claims

1. A ski run making apparatus comprising: a support structure; a first tiller comprising a frame; a tracksetting device; a connection structure comprising a first articulated joint that connects the tracksetting device to the first tiller, a second articulated joint that freely rotatably connects the first tiller to the support structure, a third articulated joint and a first arm that connects the third articulated joint to the second articulated joint, wherein the connection structure is configured to enable free rotation about an axis, transverse to an advancing direction, of the tracksetting device with respect to the first tiller such that a position of the first tiller with respect to a snowpack can be varied without altering a position of the tracksetting device with respect to the snowpack; and a first actuator having a selectively adjustable length that connects the frame of the first tiller to the third articulated joint such that a distance between the frame of the first tiller and the third articulated joint is selectively adjustable.

2. The ski run making apparatus of claim 1, wherein the connection structure comprises a fourth articulated joint and a second arm that connects the fourth articulated joint to the third articulated joint, wherein the tracksetting device is freely rotatably connected to the fourth articulated joint.

3. The ski run making apparatus of claim 1, wherein the connection structure comprises a guide connected to the tracksetting device and to the first articulated joint.

4. The ski run making apparatus of claim 1, wherein the tracksetting device comprises a second tiller, a sled and a tracksetting device support structure connected to the first tiller by the connection structure.

5. The ski run making apparatus of claim 4, wherein the second tiller is connected to the tracksetting device support structure by an articulated joint and by a second arm selectively constrained to a body of the tracksetting device support structure by an actuator.

6. The ski run making apparatus of claim 5, wherein the sled is connected to an elongated portion of the tracksetting device support structure, the elongated portion of the tracksetting device support structure being connected to the body of the tracksetting device support structure by another articulated joint and by the actuator so as to selectively adjustably constrain a position of the elongated body of the tracksetting device support structure with respect to the body of the tracksetting device support structure.

7. The ski run making apparatus of claim 4, wherein the second tiller is arranged between the first tiller and the sled along the advancement direction.

8. A ski run making apparatus comprising: a support structure; a first tiller; a tracksetting device; an actuator having a selectively adjustable length; and a connection structure that connects the tracksetting device to the first tiller, wherein the connection structure defines an articulated quadrilateral comprising four articulated joints which connect the tracksetting device to the first tiller such that the tracksetting device is freely rotatable about an axis of the tracksetting device with respect to the first tiller to assume a position with respect to a snowpack that is independent of a position of the first tiller with respect to the snowpack, the connection structure comprising a fifth articulated joint and a sixth articulated joint, the fifth articulated joint is connected the first tiller at a point different from a first articulated joint of the four articulated joints, and the sixth articulated joint is connected to the tracksetting device and connected to the fifth articulated joint by the actuator such that a distance between the fifth articulated joint and the sixth articulated joint is selectively adjustable.

9. A ski run making apparatus comprising: a support structure configured to support the ski run making apparatus and connect the ski run making apparatus to a vehicle; a first tiller supported by the support structure; a tracksetting device; a connection structure that couples the tracksetting device to the first tiller, wherein: the connection structure comprises a first articulated joint that connects the first tiller to the tracksetting device; the connection structure comprises a second articulated joint that is connected to the first tiller at a point different from the first articulated joint, and the connection structure is configured to enable a rotation about an axis, transverse to an advancing direction, of the tracksetting device with respect to the first tiller such that a position of the first tiller with respect to a snowpack can be varied without altering a position of the tracksetting device with respect to the snowpack; and an actuator having a selectively adjustable length, wherein the connection structure comprises a third articulated joint connected to the second articulated joint by the actuator and connected to the tracksetting device such that a distance between the second articulated joint and the third articulated joint is selectively adjustable.

10. The ski run making apparatus of claim 9, wherein the tracksetting device further comprises: a support structure connected to the first tiller by the connection structure; a second tiller; and a sled.

11. The ski run making apparatus of claim 10, wherein the second tiller is connected to the support structure by a fourth articulated joint and by an arm selectively constrained to a body of the support structure by an actuator.

12. The ski run making apparatus of claim 10, wherein the sled is connected to an elongated portion of the support structure that is connected to a body of the support structure by a fourth articulated joint and by an actuator to selectively adjustably constrain a position of the elongated body with respect to the body of the support structure.

13. The ski run making apparatus of claim 10, wherein the second tiller is arranged between the first tiller and the sled along the advancement direction.

14. A ski run making apparatus comprising: a support structure; a first tiller; a tracksetting device; and a connection structure defining an articulated quadrilateral having four articulated joints that connect the tracksetting device to the first tiller such that the tracksetting device is freely rotatable about an axis, transverse to an advancing direction, of the tracksetting device to assume a position with respect to a snowpack that is independent of a position of the first tiller with respect to the snowpack, the connection structure comprising a fifth articulated joint connected the first tiller at a point different from a first articulated joint of the four articulated joints which connect the tracksetting device to the first tiller, wherein the connection structure is configured to enable free rotation about the axis of the tracksetting device with respect to the first tiller such that the position of the first tiller with respect to the snowpack can be varied without altering the position of the tracksetting device with respect to the snowpack.

15. The ski run making apparatus of claim 14, wherein the support structure is connected to one of the four articulated joints.

16. The ski run making apparatus of claim 14, wherein the tracksetting device comprises a second tiller, a sled and a tracksetting device support structure connected to the first tiller by the connection structure.

17. The ski run making apparatus of claim 16, wherein the second tiller is connected to the tracksetting device support structure by an articulated joint and by an arm selectively constrained to a body of the tracksetting device support structure by an actuator.

18. The ski run making apparatus of claim 17, wherein the sled is connected to an elongated portion of the tracksetting device support structure, the elongated portion of the tracksetting device support structure being connected to the body of the tracksetting device support structure by another articulated joint and by the actuator so as to selectively adjustably constrain a position of the elongated body of the tracksetting device support structure with respect to the body of the tracksetting device support structure.

19. The ski run making apparatus of claim 16, wherein the second tiller is arranged between the first tiller and the sled along the advancement direction.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further characteristics and advantages of the present disclosure will become clear from the description that follows of a non-limitative embodiment, with reference to the figures in the accompanying drawings, in which:

(2) FIG. 1 is a perspective view, with parts removed for clarity, of an apparatus configured to make tracks for a cross-country ski run in accordance with a first embodiment of the present disclosure;

(3) FIG. 2 is a side elevation view, with parts removed for clarity, of the apparatus in FIG. 1 in a first operating configuration;

(4) FIG. 3 is a side elevation view, with parts removed for clarity, of the apparatus in FIG. 1 in a second operating configuration;

(5) FIG. 4 is a side elevation view, with parts removed for clarity, of an apparatus configured to make tracks for a cross-country ski run in accordance with a second embodiment of the present disclosure; and

(6) FIG. 5 is a side elevation view, with parts removed for clarity, of the apparatus in FIG. 4 in a second operating configuration.

DETAILED DESCRIPTION

(7) Referring now to the example embodiments of the present disclosure illustrated in FIGS. 1 to 5 and specifically with reference to FIGS. 1 and 2, an apparatus configured to make a cross-country ski run, in particular of the alternate stride type, is indicated as a whole by reference numeral 1. In the case shown in FIG. 1, the apparatus 1 comprises a support structure 71 configured to support the apparatus 1, a snow tiller 2 supported by the support structure 71, two tracksetting devices 3 to each form two tracks 4 parallel to a direction D1 that corresponds to the advancement direction of the apparatus 1, and a connection structure 19 configured to connect the tracksetting devices 3 to the tiller 2 in an articulated manner to allow or enable rotation about an axis transverse to the direction D1 of the tracksetting devices 3 with respect to the tiller 2.

(8) The number of two tracksetting devices is purely indicative and the present disclosure relates to the single tracksetting device or to a machine equipped with more than two tracksetting devices.

(9) In greater detail, each track 4 is substantially defined by a furrow having a cross section substantially with the form of an isosceles trapezium.

(10) The apparatus 1 is drawn by a vehicle 8 and is connected to the vehicle 8 by the support structure 71. In greater detail, the support structure 71 comprises a connection unit 71a configured to be connected to the vehicle 8. The vehicle 8 is, but not limited to, a tracked vehicle, such as a groomer.

(11) With reference to FIG. 2, the tiller 2 comprises a frame 5, a shaft 6, a casing 7 placed around the shaft 6 and a mat 7a made of a flexible material.

(12) The shaft 6 is mounted so as to rotate about an axis A and is fitted with teeth 9.

(13) The tiller 2 is supported by the support structure 71. In particular, the tiller 2 is connected to the support structure 71 via the connection structure 19.

(14) The connection structure 19 comprises an articulated joint 19a, an articulated joint 19b, an articulated joint 19c, an articulated joint 19d, an arm 19e that connects articulated joint 19a and articulated joint 19b, an arm 19f that connects articulated joint 19b and articulated joint 19c, and a guide 10.

(15) The frame 5 of the tiller 2 is connected directly to the support structure 71 by articulated joint 19a. In addition, arm 19e is connected to articulated joint 19a and to the support structure 71. The frame 5 of the tiller 2 is connected to the support structure 71 at articulated joint 19b of the support structure 71.

(16) The apparatus 1 comprises an actuator 50 that connects articulated joint 19b to the frame 5 of the tiller 2 and is configured to alter its length. In greater detail, the actuator 50 is connected to articulated joint 19b and to the frame 5 at a connection point 50a different from articulated joint 19a. In consequence, the distance between the frame 5 and articulated joint 19b can selectively vary according to the variable length of the actuator 50.

(17) The inclination of the tiller 2 with respect to a snowpack N can be adjusted by acting on a position of the support structure 71 and on the length of the actuator 50.

(18) With reference to FIG. 1, the guide 10 of the connection structure 19 is substantially parallel to axis A. The two tracksetting devices 3 are slidingly mounted along the guide 10. Furthermore, the guide 10 is connected to articulated joint 19c by an arm 10a and to articulated joint 19d by an arm 10b.

(19) In greater detail, the guide 10 is connected to the tiller 2 by articulated joint 19d. In particular, the guide 10 is connected to the frame 5 of the tiller 2 by articulated joint 19d of the connection structure 19.

(20) With reference to FIGS. 1 to 3, each tracksetting device 3 comprises a support structure 11 that is coupled to the guide 10, an actuator 15, a pan 16, and a tiller 20.

(21) Furthermore, each tracksetting device 3 is connected to the support structure 71 and to the tiller 2 by the connection structure 19 so as to allow free rotation, such as about an axis parallel to axis A, with respect to the tiller 2 and to the support structure 71. Each support structure 11 comprises a body 13 defined like a slider engaged by the guide 10 and an elongated portion 14, which is hinged to the body 13. The actuator 15 is placed between the body 13 and the elongated portion 14 to selectively arrange the elongated portion 14 in a working position, in which the tracksetting device 3 is in contact with the snowpack N and makes the tracks 4, and a rest position, in which the tracksetting device 3 is raised above the snowpack N and does not make the tracks 4. In the accompanying drawings, the tracksetting device 3 is always in the working position. In greater detail, the elongated portion 14 is connected to the body 13 by an articulated joint 14a. The articulated joint 14a is constrained by the actuator 15. In other words, the elongated portion 14 is not free to rotate with respect to the body 13 without operation of the actuator 15.

(22) With reference to FIGS. 1 to 3, the pan 16 is connected to the support structure 11 and defined by a plate having a flat bottom surface 17 curved slightly upwards on the front edge; two runners 18, which are connected to the pan 16, protrude downwards with respect to the bottom surface of the pan 16, and are arranged at the rear edge of the pan 16.

(23) The tiller 20 is coupled to the support structure 11. In particular, the tiller 20 is coupled to the elongated portion 14 by an arm 12 on an articulated joint 12a and to a central body 11a of the support structure 11 on an articulated joint 11b. The central body 11a is connected to the body 13.

(24) In certain embodiments, the apparatus 1 comprises an actuator that is configured to move the body 13 along the guide 10 and to adjust the distance between the tracksetting devices 3 in a direction transverse to direction D1. In another embodiment not shown in the accompanying drawings, this actuator is omitted.

(25) In one optional embodiment of the present disclosure, the tracksetting device 3 comprises two blades 23 (shown in FIGS. 2 and 3 with broken lines) connected to a frame 20a of tiller 20. The blades 23 are arranged between tiller 20 and tiller 7. In this case, each blade 23 is aligned with a runner 18.

(26) The blade 23 has dimensions slightly larger than those of the runners 18 and separates an elongated and continuous portion of snowpack N from the remaining part of the snowpack N. In use, tiller 2 works a wide strip of the snowpack N to a small depth, while tillers 20 work narrow strips to a greater depth. The separation of the elongated and continuous portion causes a crumbling effect of the elongated and continuous portion that facilitates the formation of the track 4.

(27) Each runner 18 is dragged along an elongated and continuous portion and compacts the snowpack N of this elongated and continuous portion through to the compressing action exerted by the actuator 15.

(28) The connection structure 19 defines an articulated quadrilateral for each tracksetting device 3 that connects the tracksetting device 3 to the tiller 2 and the support structure 71. The articulated quadrilateral is formed by articulated joints 19a, 19b, 19c and 19e, by elements 19e and 19f, by a portion of the frame 5 of the tiller 2 interposed between articulated joint 19a and articulated joint 19d, by arms 10a and 10b, and by the guide 10 interposed between articulated joint 19c and articulated joint 19d.

(29) It should be appreciated that in accordance with the present disclosure, the position of the tiller 2 with respect to the snowpack N can be varied via the actuator 50 and/or the position of the support structure 71, without altering the position of tiller 20 with respect to the snowpack N. In fact, as can be seen in FIGS. 2 and 3, the position of tiller 2 varies from a first operating position to a second operating position, but the position of tiller 20 with respect to the snowpack N does not change due to the articulated connection provided by the connection structure 19. In other words, the connection structure 19 provides a freely articulated linkage between the tiller 2, the support structure 71 and the tracksetting device 3. In consequence, the position of the tracksetting device 3 is not altered by the position of tiller 2 and can be adjusted by the actuator 15, which acts on the elongated portion 14 that is connected to the body 13 of the support structure 11.

(30) According to a further variant, not shown in the accompanying drawings, the runner and the blades of the tracksetting device are movable in the direction transverse to a designated direction D1 so as to adjust the distance between two adjacent tracks. In this case, the runners and the blades are mounted on respective guides and connected to actuators that enable remotely adjusting their relative position so as to adjust the distance between the tracks. For example, European Patent Document No. 450,138 describes a device configured to adjust the track width of the runners. That is, on bends, it is necessary to increase the distance between the two adjacent tracks with respect to the distance between straight tracks to allow the skier's natural movement in seeking areas of support that ensure relatively greater stability on bends.

(31) With reference to FIGS. 4 and 5, reference numeral 101 indicates a second embodiment of an apparatus configured to make a cross-country ski run, in alternative to apparatus 1. In the case shown in FIG. 4, the apparatus 101 comprises a support structure 171 configured to support the apparatus 101, a snow tiller 2 supported by the support structure 171, four tracksetting devices 3 to each form two tracks 4 parallel to a direction D1 that corresponds to the advancement direction of the apparatus 101, and a connection structure 119 configured to connect the tracksetting devices 3 to the tiller 2 in an articulated manner to enable rotation about an axis transverse to the direction D1 of the tracksetting devices 3 with respect to the tiller 2.

(32) The number of four tracksetting devices is purely indicative and the present disclosure relates to any number of tracksetting devices from one to more than four.

(33) The apparatus 101 is drawn by a vehicle 8 and is connected to the vehicle 8 by the support structure 171.

(34) The tiller 2 and the tracksetting devices 3 of the apparatus 101 are made in the same way as those of apparatus 1 and are shown with the same reference numerals, and will not be further described.

(35) Apparatus 101 mainly differs from apparatus 1 in the connection structure 119.

(36) The tiller 2 is directly supported by the support structure 171. The frame 5 of the tiller 2 is connected directly to the support structure 171 at a connection point 171a.

(37) Furthermore, the tracksetting devices 3 are connected to the tiller 2 by the connection structure 119 and are not directly connected to the support structure 171. In other words, unlike apparatus 1, in apparatus 101 the tracksetting devices 3 are only connected to the tiller 2 by the connection structure 119. In consequence, the connection structure 119 only extends from the tiller 2 to the tracksetting devices 3.

(38) The connection structure 119 comprises a guide 110, and an elongated element 119f connected along the frame 5 of the tiller 2. In addition, the connection structure 119 comprises an articulated joint 119a, an articulated joint 119b and an articulated joint 119c. The articulated joint 119a and articulated joint 119b are connected to the elongated element 119f of the connection structure 119.

(39) Furthermore, the apparatus 101 comprises an actuator 150 that is interposed between articulated joint 119a and articulated joint 119c and connects them to one another. The actuator 150 is selectively adjustable in length, and so the distance between articulated joint 110a and articulated joint 119c is variable.

(40) In consequence, the distance between the tiller 2 and the tracksetting devices 3 can selectively vary on the basis of the variable length of the actuator 150.

(41) The inclination of the tiller 2 with respect to a snowpack N can be adjusted by acting on a position of the support structure 171.

(42) With reference to FIGS. 4 and 5, the guide 110 of the connection structure 119 is substantially parallel to axis A. The tracksetting devices 3 are slidingly mounted along the guide 110. Furthermore, the guide 110 is connected to articulated joint 110c by an arm 110a and to articulated joint 119b by an arm 110b.

(43) In particular, the guide 110 is only connected to the frame 5 of the tiller 2.

(44) Furthermore, each tracksetting device 3 is connected to the tiller 2 by the connection structure 119 so as to allow free rotation, such as about an axis parallel to axis A, with respect to the tiller 2.

(45) The connection structure 119 defines a structure with three sides, in which the length of one of the sides varies, for each tracksetting device 3, and which connects the tracksetting device 3 to the tiller 2 by the guide 110. The three-sided structure is formed by articulated joints 119a, 119b and 119c, by elements 119f, by the guide 110 and by arms 110a and 110b of the guide 110, and by the actuator 150.

(46) It should be appreciated that in accordance with the present disclosure, the position of tiller 2 with respect to the snowpack N can be varied through the actuator 150, without altering the position of tiller 20 with respect to the snowpack N. That is, as can be seen in FIGS. 4 and 5, the position of tiller 2 varies from a first operating position to a second operating position, but the position of tiller 20 with respect to the snowpack N does not change thanks to the variation in length of the actuator 150, which compensates the variation in the position of tiller 2. In other words, the connection structure 19 provides an articulated connection between the tiller 2 and the tracksetting device 3. In consequence, the position of the tracksetting device 3 is not altered by the position of tiller 2 and can be adjusted by the actuator 15, which acts on the elongated portion 14 that is connected to the body 13 of the support structure 11.

(47) In one embodiment of the present disclosure, not shown in the accompanying drawings, the apparatus 101 comprises control unit that acts on the actuator 150 to adjust the length of the actuator 150 and on the support structure 171 for the position of the support structure 171 and, in consequence, the position of tiller 2. In other words, the movement of the support structure 171 and the movement of the actuator 150 are controlled by the control unit in a synchronous manner so that when the position of the support structure 171 changes to vary the position of tiller 2, the position of the tracksetting device 3 does not vary. Put differently, utilization of the control unit, which simultaneously controls both the position of the support structure 171 and the actuator 150, provides that the position of the tracksetting device 3 is independent of the position of tiller 2.

(48) Finally, it is evident that modifications and variants can be made with regard to the apparatus without departing from the scope of the appended claims. As such, the present disclosure also covers embodiments not described in the detailed description and equivalent embodiments that fall within scope of the appended claims. Accordingly, various changes and modifications to the presently disclosed embodiments will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.