Driving device for snow sports boards, in particular SKIS, snowboards, splitboards and / or the like

Abstract

A driving device (1) for snow sports boards (2), in particular skis, snowboards, splitboards and / or the like, comprises: at least one electric motor (3); at least one continuous traction belt (8) running longitudinally in a closed loop; at least one power supply unit (4) of the electric motor (3) comprising a plurality of rechargeable batteries and defining a supporting structure (5) which is developed along a predominant longitudinal direction and has a first end (5a) and a second end (5b) opposite to each other and each arranged to remain at or near a respective tail portion (2a) or tip portion (2b) of a respective snow sports board (2) when the device (1) is engaged thereon, wherein the continuous looped traction belt (8) runs or wraps longitudinally around the supporting structure (5) from the first end (5a) to the second end (5b) thereof; at least one transmission device (14) operatively interposed between the electric motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the electric motor (3), a forward movement along its longitudinal closed loop development and around the supporting structure (5); at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the device (1) with a snow sports board (2) which is structurally configured to guarantee: an engagement condition, wherein the device (1) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a lower branch of the continuous looped traction belt (8) facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the electric motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the device (1) on the snow, together with said sports board (2); a disengagement condition, wherein the device (1) is disengaged and / or separated from the snow sports board (2) and can be folded to assume a compact shape having a reduced overall size compared to the overall size of the device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

Description

[0001] DRIVING DEVICE FOR SNOW SPORTS BOARDS, IN PARTICULAR SKIS, SNOWBOARDS, SPLITBOARDS AND / OR THE LIKE

[0002] TECHNICAL FIELD

[0003] The present invention relates to a driving device for snow sports boards, in particular skis, snowboards, splitboards and / or the like.

[0004] The present invention also concerns the use of a driving device on a snow sports board, in particular a ski, a snowboard, a splitboard and / or a similar board, for assisting the forward movement and displacement of a user on snow.

[0005] A sports equipment for snow sports activities, in particular ski mountaineering, also forms subject-matter of the present invention.

[0006] BACKGROUND ART

[0007] As is known, ski mountaineering is a discipline that involves ascending snowy slopes with the aid of climbing skins, i.e. devices applicable to the base of skis that ensure grip on the snow during the ascent and prevent backward sliding. Traditional climbing skins are made from genuine seal furs, whereas more modern climbing skins employ synthetic materials such as synthetic polyamide, for example nylon, and a textile fibre of animal origin, for example mohair, capable of providing an optimal balance between gliding and grip. Climbing skins are essential for ensuring the autonomous progression of the skier without the need for ski lifts.

[0008] Over time, various devices aimed at motorising skis to facilitate the ascent have emerged, reducing the physical effort required from the athlete and / or the user. Some experimental systems involve the integration of electric motors into the skis themselves or into external modules applicable thereto, often powered by rechargeable batteries and controlled by remote controls or pressure sensors. Solutions of this type aim to replace or supplement the use of climbing skins, allowing a smoother and less strenuous progression, particularly useful in deep snow conditions or on very steep slopes.

[0009] The ski industry has seen the introduction of electric devices designed to facilitate climbing, reducing the physical effort required from skiers and / or users. An innovative example is represented by a system that integrates a motorised tread similar to a track beneath the ski, powered by a compact electric motor and a lithium battery. Other existing systems integrate electric motors to facilitate the ascent, eliminating the need for ski lifts and reducing queues on the slopes. An example of the above-mentioned known electric motorisation systems for skis is described and illustrated in document EP4356984. In detail, this document describes an innovation in the ski mountaineering field, proposing a system that facilitates the ascent without having to use traditional climbing skins. In fact, a motorised device and a climbing assistance system integrated into the skis as an external accessory are described. The main objective is to reduce the physical effort of the skier and / or user, offering a more comfortable and effective solution compared to climbing skins, which require manual installation and may be less efficient on some types of snow.

[0010] According to what is described in said document, various motorisation configurations are provided, including tracks, moving surfaces or toothed wheels, which have the purpose of improving the grip on snow and allowing the skier and / or user to advance without sliding backward.The device can be powered by rechargeable batteries and a control system is also provided that allows the traction intensity to be adjusted according to the terrain conditions and the slope.

[0011] Other ski motorisation devices and systems are provided in the documents that follow.

[0012] Document IT201800006186 relates to a sports equipment for ski mountaineering which provides for a motorised assistance device. In particular, skis equipped with an electric motor that provides climbing assistance are provided, reducing the effort required from skiers and / or users, in particular beginners. The system is composed of various advanced technological elements, such as for example: a unidirectional clutch that prevents the skis from sliding backward; motion sensors that monitor the position of the ski and automatically adjust the motor power to provide optimal support; as well as a regenerative braking system, which allows part of the kinetic energy to be recovered during the descent to recharge the battery and improve energy efficiency.

[0013] Document WO2015161329 concerns a system designed to assist locomotion on difficult surfaces, such as rough terrain, mountain trails or snowy areas. The device described in said document uses electric motors and a shock -absorbing suspension system to reduce vibrations and improve user comfort. In addition, the device is equipped with sensors that continuously analyse the terrain and automatically adjust the speed and power of the motor to optimise performance. EP3092042B1 discloses a self-propelled ski or snowboard provided with a motorized traction system integrated into the ski structure. The invention particularly envisages a drive unit, for example comprising a track-based propulsion mechanism or an equivalent traction arrangement, configured to generate longitudinal movement over snow. The system enables the user to travel autonomously, including uphill, thereby reducing or eliminating reliance on conventional ski lift infrastructure.

[0014] The disclosed solution addresses the technical problem of dependence on ski resort facilities and the significant physical effort required for manual ascent. In conventional systems, skiers must rely on chairlifts, drag lifts, or physically climb uphill, resulting in energy expenditure and operational limitations. According to this case, the disclosed solution therefore aims to combine conventional downhill skiing functionality with autonomous uphill propulsion. The technical advantage lies in integrating the traction system without substantially impairing downhill sliding performance, thereby improving user autonomy and overall skiing efficiency.

[0015] W02020216220A1 discloses a modular self-propelled ski system comprising at least one detachable drive assembly mountable on each ski. The drive assembly, preferably track-based and powered by an electric motor supplied by a dedicated battery, is selectively positionable on the lower side of the ski in a powered walking mode and on the upper side in a conventional skiing mode.

[0016] The solution further provides interchangeable accessory elements, such as universal front wheels or snow guides, enabling adaptation to different terrain conditions. Quick clamping mechanisms allow rapid conversion between operational configurations. Remote control systems, optionally integrated into a ski pole handle, as well as communication interfaces with ground base stations for safety signaling or emergency maneuvers, are also disclosed.

[0017] The solution addresses the problem of uphill fatigue and the limited versatility of traditional skis in areas without lift infrastructure. It additionally facilitates transport over hard or snowy ground before reaching the slope. The primary technical advantage lies in the modularity and rapid reconfigurability of the system between powered ascent and conventional skiing mode, while substantially preserving the dynamic characteristics of a standard ski during downhill use.US2021299547A1 discloses a personal self-propelled vehicle applicable to a ski, comprising a closed-loop flexible ribbon configured to longitudinally envelop the ski and pass at least partially beneath its sliding surface. The ribbon is driven by a motorized roller and tensioned by an opposite guiding roller. The ribbon surface has a lattice configuration with a plurality of openings defined by webs dimensioned to selectively interact with snow.

[0018] During operation, the lattice structure allows controlled penetration of the webs into the snow layer under load, thereby generating longitudinal thrust, while the openings reduce sliding resistance.

[0019] The solution addresses drawbacks of conventional track-based systems, which are typically heavy, bulky, and increase friction during downhill motion. Traditional systems may also negatively impact energy efficiency and dynamic ski performance. The technical advantage resides in the use of a lightweight, flexible traction element that, through its lattice configuration, combines propulsion capability with reduced sliding resistance, while maintaining compatibility with commercially available skis and enabling a compact, removable configuration.

[0020] Despite the technological advances, the adoption of these systems is still limited by factors such as additional weight, battery life and reliability in extreme conditions.

[0021] Furthermore, the known motorisation or propulsion systems for skis or the like are particularly bulky and complex, whereby the skis are normally penalised by the configurations of such systems, both in terms of weight and in terms of space. It should also be considered that such systems are usually totally or partially integrated into the skis and therefore cannot ever be completely disengaged therefrom. Dedicated skis must therefore be provided that are modified to be integrated with such motorisation or propulsion systems.

[0022] OBJECT OF THE INVENTION

[0023] The main object of the present invention is to solve one or more of the problems encountered in the prior art.

[0024] It is a priority object of the present invention to provide a driving device for snow sports boards, such as for example skis, snowboards, splitboards and / or the like, which can be applied on such boards and which is entirely disengageable therefrom so as to leave them free and devoid of foreign elements or bodies.

[0025] It is similarly an object of the present invention to provide a driving device for snow sports boards that is foldable in a disengagement condition from the respective snow sports board or in a non-use condition.

[0026] It is also an object of the present invention to propose a driving device for snow sports boards that is easy and convenient to transport in a disengagement condition from the respective snow sports board or in a non-use condition.

[0027] It is furthermore an object of the present invention to provide a driving device for snow sports boards that is easy and simple to apply to and remove from a respective snow sports board.

[0028] It is also an object of the present invention to provide a driving device for snow sports boards having a reduced overall size.

[0029] A further object of the present invention is to propose a driving device for snow sports boards that adapts to different types of boards and to different sizes thereof.

[0030] Another object of the present invention is to provide a driving device for snow sports boards that is performing in terms of range, efficiency, reliability, as well as usability and use.These objects and others, which will become more apparent from the following description, are substantially achieved by a driving device for snow sports boards, in particular skis, snowboards, splitboards and / or the like in accordance with what is expressed in one or more of the appended claims and / or of the following aspects, taken alone or in combination with each other or in combination with any one of the appended claims and / or in combination with any of the further aspects or features described below.

[0031] SUMMARY OF THE INVENTION

[0032] The aspects of the invention are described herein.

[0033] In a 1stindependent aspect, a driving device (1) for snow sports boards (2), in particular skis, snowboards, splitboards and / or the like, is provided, comprising:

[0034] at least one motor (3);

[0035] at least one continuous traction belt (8) running longitudinally in a closed loop;

[0036] at least one transmission device (14) operatively interposed between the motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development;

[0037] at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with a snow sports board (2) comprising a structure having a central portion (2c), a tail portion (2a) and a tip portion (2b) arranged on opposite sides with respect to the central portion (2c), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:

[0038] o engagement condition, wherein the driving device (1 ) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular the lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with said sports board (2);

[0039] o disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2).

[0040] In a further independent aspect 1stbis, which can be combined with the preceding aspect and / or with any one of the following aspects, a driving device (1) for snow sports boards (2), in particular skis, snowboards, splitboards and / or the like, is provided, comprising:

[0041] at least one motor (3);

[0042] at least one continuous traction belt (8) running longitudinally in a closed loop;

[0043] at least one power supply unit (4) of the motor (3) comprising a plurality of rechargeable batteries, the power supply unit (4) defining a supporting structure (5) which is developed along a predominant direction, in particular a longitudinal direction, and having a first end (5a) and a second end (5b) opposite to each other and each arranged to remain at or near a respective tail portion (2a) or tip portion (2b) of a respective snow sports board (2) when the driving device (1) is engaged thereon, the continuous looped traction belt (8) running longitudinally around the supporting structure (5) defined by the power supply unit (4) of the motor (3) from the first end (5a) to the second end (5b) thereof,in particular the continuous looped traction belt (8) longitudinally wrapping around the supporting structure (5) defined by the power supply unit (4) of the motor (3) from the first end (5a) to the second end (5b) thereof.

[0044] at least one transmission device (14) operatively interposed between the motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development and around the supporting structure (5) of the power supply unit (4) of the motor (3);

[0045] at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with a snow sports board (2), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:

[0046] o engagement condition, wherein the driving device (1 ) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular the lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with said sports board (2);

[0047] o disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2), in the disengagement condition, the driving device (1) being foldable along at least one folding direction to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

[0048] In a further independent aspect 1stter, which can be combined with the preceding aspect and / or with any one of the following aspects, a driving device (1) for snow sports boards (2), in particular skis, snowboards, splitboards and / or the like, is provided, comprising:

[0049] at least one electric motor (3), optionally a brushless electric motor (3);

[0050] at least one continuous traction belt (8) running longitudinally in a closed loop, in particular the continuous looped traction belt (8) being divided into two identical, separate, parallel, side-by-side and laterally spaced continuous looped traction strips (9);

[0051] at least one transmission device (14) operatively interposed between the motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development;

[0052] at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with a snow sports board (2) comprising a structure having a central portion (2c), a tail portion (2a) and a tip portion (2b) arranged on opposite sides with respect to the central portion (2c), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:

[0053] o engagement condition, wherein the driving device (1 ) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular the lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with said sports board (2);o disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2), in the disengagement condition, the driving device (1) being foldable along at least one folding direction to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

[0054] In a further independent aspect 1stquater, which can be combined with the preceding aspect and / or with any one of the following aspects, the use of a driving device (1) on a snow sports board (2), in particular a ski, a snowboard, a splitboard and / or the like, for assisting the forward movement and displacement of a user on snow is provided, the driving device (1) comprising:

[0055] at least one electric motor (3), optionally a brushless electric motor (3);

[0056] at least one continuous traction belt (8) running longitudinally in a closed loop, in particular the continuous looped traction belt (8) being divided into two identical, separate, parallel, side-by-side and laterally spaced continuous looped traction strips (9);

[0057] at least one transmission device (14) operatively interposed between the motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development;

[0058] at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with a snow sports board (2) comprising a structure having a central portion (2c), a tail portion (2a) and a tip portion (2b) arranged on opposite sides with respect to the central portion (2c), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:

[0059] o engagement condition, wherein the driving device (1 ) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular the lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with said sports board (2);

[0060] o disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2), in the disengagement condition, the driving device (1) being foldable along at least one folding direction to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

[0061] In a further independent aspect 1stquinquies, which can be combined with the preceding aspect and / or with any one of the following aspects, a sports equipment for snow sports activities, in particular ski mountaineering, is provided, comprising:

[0062] at least one snow sports board (2), optionally a ski, a snowboard, a splitboard or a similar sports board, having a tail portion (2a), a tip portion (2b) opposite to each other and a central portion (2c) interposed between the tail portion (2a) and the tip portion (2b);

[0063] at least one driving device (1) comprising:

[0064] o at least one electric motor (3), optionally a brushless electric motor (3);o at least one continuous traction belt (8) running longitudinally in a closed loop, in particular the continuous looped traction belt (8) being divided into two identical, separate, parallel, side-by-side and laterally spaced continuous looped traction strips (9);

[0065] o at least one transmission device (14) operatively interposed between the motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development;

[0066] o at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with the snow sports board (2), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:

[0067] ■ engagement condition, wherein the driving device (1 ) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular the lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with the sports board (2);

[0068] ■ disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2), in the disengagement condition, the driving device (1) is foldable along at least one folding direction to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

[0069] In a 2ndaspect in accordance with any one of the preceding aspects, the motor (3) is an electric motor.

[0070] In a 3rdaspect in accordance with the preceding aspect, the electric motor (3) is a brushless electric motor.

[0071] In a 4thaspect in accordance with any one of the three preceding aspects, the electric motor (3) is positioned at an end of the driving device (1), in particular near at least one end of the respective snow sports board (2) to which the driving device (1) is engageable or engaged, optionally near the tail portion (2a) or the tip portion (2b) of the snow sports board (2) to which the driving device (1) is engageable or engaged.

[0072] In a 5thaspect in accordance with any one of the two preceding aspects, the electric motor (3) is energetically powered by a respective power supply unit (4) comprising at least one battery (4a), optionally a plurality of batteries connected to each other.

[0073] In a 6thaspect in accordance with the preceding aspect, the battery (4a) or each battery (4a) of the power supply unit (4) of the electric motor (3) is a rechargeable battery.

[0074] In a 7thaspect in accordance with the preceding aspect, the battery (4a) or each battery (4a) of the power supply unit (4) of the electric motor (3) is a Lithium-ion battery, optionally with optimised chemistry, to withstand cold and low temperatures.

[0075] In an 8thaspect in accordance with the preceding aspect, the battery (4a) or each Lithium-ion battery (4a) of the power supply unit (4) of the electric motor (3) is a LiNiMnCoO2 (NMC) battery.

[0076] In a 9thaspect in accordance with the 7thaspect, the battery (4a) or each Lithium-ion battery (4a) of the power supply unit (4) of the electric motor (3) is a LiFePO4 (LFP) battery.In a 10thaspect in accordance with the 7thaspect, the battery (4a) or each Lithium-ion battery (4a) of the power supply unit (4) of the electric motor (3) is a LiPo (Lithium Polymer) battery.

[0077] In an 11thaspect in accordance with any one of the six preceding aspects, the battery (4a) or each battery (4a) of the power supply unit (4) of the electric motor (3) is a battery with integrated heating.

[0078] In a 12thaspect in accordance with any one of the seven preceding aspects, the battery (4a) or each battery (4a) of the power supply unit (4) of the electric motor (3) is housed in a thermal casing and / or made of an insulating material, the thermal casing and / or made of an insulating material contributing to the thermal insulation of each battery (4a) with respect to the surrounding environment.

[0079] In a 13thaspect in accordance with the preceding aspect, the thermal casing of one or more batteries (4a) of the power supply unit (4) of the electric motor (3) is made of neoprene or silicone or insulating foam or a similar insulating material. In a 13thbis aspect in accordance with any one of the two preceding aspects, the thermal casing of a battery (4a) or of one or more batteries (4a) or of specific groups of batteries (4a) comprises:

[0080] a first envelope (4c), in particular the innermost one, having at least one layer made of cross-linked polyolefin or of a composite material with reinforcing fibres;

[0081] a second envelope (4d), in particular the outermost one, made, on the upper side and / or lower side (4d‘), of an aluminium sheet, optionally alloyed with magnesium and silicon, or of a composite material, in particular carbon fibre or an aramid synthetic fibre, such as for example kevlar, and laterally (4d"), of a polymer, optionally polyurethane or synthetic polyamide, such as for example nylon or UHMWPE / ABS, in the case where the second envelope (4d) is made on the lower side of a composite material, at least one structural module (6), optionally all the structural modules (6) of the supporting structure (5), is / are provided, on each lower lateral edge, with a steel profile, in particular stainless steel, having a corresponding stabilisation blade.

[0082] In a 14thaspect in accordance with any one of the ten preceding aspects, the power supply unit (4) of the electric motor (3) defines a supporting structure (5) which is developed along a predominant direction, in particular a longitudinal direction, and has a first end (5a) and a second end (5b) opposite to each other and each arranged to remain at or near a tail portion (2a) or a tip portion (2b) of a respective snow sports board (2) when the driving device (1) is engaged thereon, the continuous looped traction belt (8) running longitudinally around the supporting structure (5) from the first end (5a) to the second end (5b) thereof, in particular the continuous looped traction belt (8) longitudinally wrapping around the supporting structure (5) from the first end (5a) to the second end (5b) thereof.

[0083] In a 15thaspect in accordance with the preceding aspect, the supporting structure (5) has at least two structural modules (6), in particular a plurality of structural modules (6), aligned along the predominant direction of development and mutually connected to each other by means of a respective intermediate joining portion (7).

[0084] In a 16thaspect in accordance with the preceding aspect, the intermediate joining portion (7) interposed between two corresponding adjacent structural modules (6) of the supporting structure (5) is flexible, in particular bendable, in order to allow a structural module (6) to be flipped and / or superimposed on the adjacent structural module (6), in particular when the driving device (1) is in the disengagement condition to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, in any case, in an unfolded condition.In a 17thaspect in accordance with any one of the two preceding aspects, each structural module (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) comprises, optionally encloses within itself, one or more batteries (4a) electrically connected to each other.

[0085] In an 18thaspect in accordance with the preceding aspect, the structural modules (6) of the supporting structure (5) are electrically connected to each other so as to electrically connect the respective batteries (4a) therein.

[0086] In a 19thaspect in accordance with the preceding aspect, the structural modules (6) of the supporting structure (5) are electrically connected to each other by means of respective electrical connectors which are insulated with respect to the outside.

[0087] In a 20thaspect in accordance with the preceding aspect, the electrical connectors provided between the structural modules (6) of the supporting structure (5) are housed in correspondence of the intermediate joining portions (7) between the respective structural modules (6) of the supporting structure (5).

[0088] In a 21staspect in accordance with any one of the two preceding aspects, the electrical connectors provided between the structural modules (6) of the supporting structure (5) are flexible, in particular bendable, in order to allow a structural module (6) to be flipped and / or superimposed on the adjacent structural module (6), in particular when the driving device (1) is in the disengagement condition to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, in any case, in an unfolded condition, ensuring the electrical connection between the structural modules (6).

[0089] In a 22ndaspect in accordance with any one of the eight preceding aspects, each structural module (6) of the supporting structure (5) has a substantially flattened shape with at least one thinned end, in particular with both opposite ends thinned, optionally tapered in longitudinal section of the supporting structure (5).

[0090] In a 23rdaspect in accordance with any one of the nine preceding aspects, the supporting structure (5) has a substantially flattened overall shape, optionally the supporting structure (5) having at each intermediate joining portion (7) at least one respective structural concavity, optionally two structural concavities facing respectively opposite sides.

[0091] In a 24thaspect in accordance with any one of the ten preceding aspects, each structural module (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) has an upper portion provided with at least one longitudinal groove (10) for receiving in sliding engagement the continuous looped traction belt (8) and at least one longitudinal support relief (11), optionally two or more longitudinal support reliefs (11, 12), for the upper support of a respective snow sports board (2), the longitudinal support relief (11) of each structural module (6) projecting above the longitudinal groove (10) to define an upper support plane for the respective snow sports board (2) to be supported, which lies at a higher level than the lying plane of the longitudinal groove (10) in which the continuous looped traction belt (8) is slidable, the continuous looped traction belt (8) sliding freely in the longitudinal groove (10) without coming into contact with the respective snow sports board (2).

[0092] In a 25thaspect in accordance with any one of the eleven preceding aspects, each structural module (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) has a lower portion on which the continuous looped traction belt (8) is inferiorly superimposed and slidable, upon activation of the motor (3), to interact with the snow in order to advance the driving device (1) together with the respective snow sports board (2).In a 26thaspect in accordance with the preceding aspect, the lower portion of one or more of the structural modules (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) has corresponding lateral stabilisation edges (13) configured and / or shaped to come into contact with the snow in place of the respective snow sports board (2) supported by the supporting structure (5) of the power supply unit (4) of the electric motor (3), optionally the lower portion of each structural module (6) of the supporting structure (5) being provided with corresponding longitudinal grooves (10), intended to provide the continuous looped traction strips (9) with corresponding seats for the sliding thereof.

[0093] In a 27thaspect in accordance with the preceding aspect, the lateral stabilisation edges (13) of the lower portion of each of the structural modules (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) are made of a metallic material, optionally aluminium, optionally alloyed with magnesium and silicon.

[0094] In a 28thaspect in accordance with any one of the preceding aspects, the continuous looped traction belt (8) is made of a synthetic material for climbing on snow, in particular synthetic polyamide, such as for example nylon, or a textile fibre of animal origin, such as for example mohair, or a combination of nylon and mohair.

[0095] In a 29thaspect in accordance with any one of the preceding aspects, the continuous looped traction belt (8) is made of a flexible and / or bendable synthetic material.

[0096] In a 30thaspect in accordance with any one of the preceding aspects, the continuous looped traction belt (8) has a contact surface facing outward and / or toward the snowy ground, provided with a multitude of hairs and / or bristles whose orientation with respect to the contact surface itself allows forward sliding of the driving device (1) and prevents backward sliding thereof.

[0097] In a 30thbis aspect in accordance with the preceding aspect, the continuous looped traction belt (8) is treated with at least one lubricating substance to increase its slidability with respect to the supporting structure (5), in particular along the respective longitudinal groove (10) and the corresponding lower portion of each structural module (6) thereof, optionally the lubricating substance for the treatment of the continuous looped traction belt (8) comprising a substance based on silicones or fluoropolymers, optionally deposited by spraying in order to create a thin hydrophobic layer and reduce snow accumulation.

[0098] In a 31staspect in accordance with any one of the preceding aspects, the continuous looped traction belt (8) is divided into at least two continuous traction strips (9) running longitudinally in a loop substantially parallel to each other, optionally the continuous looped traction strips (9) being made of the same material and being structurally identical.

[0099] In a 31stbis aspect in accordance with the preceding aspect when dependent on the 14thaspect or any preceding aspect dependent on the 14thaspect, each continuous looped traction strip (9) runs longitudinally around the supporting structure (5) from the first end (5a) to the second end (5b), in particular each continuous looped traction strip (9) longitudinally wrapping around the supporting structure (5) from the first end (5a) to the second end (5b).

[0100] In a 32ndaspect in accordance with any one of the two preceding aspects, the continuous looped traction strips (9) defining the continuous looped traction belt (8) are separate.

[0101] In a 33rdaspect in accordance with any one of the three preceding aspects, the continuous looped traction strips (9) defining the continuous looped traction belt (8) are side-by-side.

[0102] In a 34thaspect in accordance with any one of the four preceding aspects, the continuous looped traction strips (9) defining the continuous looped traction belt (8) are laterally spaced so as to be each located near corresponding lateral edges ofthe structural modules (6) of the supporting structure (5) leaving free a central area of said supporting structure (5) which develops along the entire longitudinal development thereof.

[0103] In a 35thaspect in accordance with any one of the five preceding aspects when dependent on the 24thaspect or any preceding aspect dependent on the 24thaspect, the upper portion of each structural module (6) of the supporting structure (5) is provided with two longitudinal grooves (10) running substantially parallel along the longitudinal development of the supporting structure (5) itself, the longitudinal grooves (10) being adapted to receive, in sliding engagement, the continuous looped traction strips (9) of the continuous looped traction belt (8).

[0104] In a 36thaspect in accordance with the preceding aspect, the longitudinal grooves (10) are laterally spaced and define between them a respective central longitudinal support relief (11) for the support of a respective snow sports board (2). In a 37thaspect in accordance with the preceding aspect, the upper portion of each structural module (6) of the supporting structure (5) has at least two lateral support reliefs (12) each running longitudinally adjacent to a respective longitudinal groove (10) on the opposite side of the central longitudinal support relief (11), the supporting structure (5) providing three support areas for the respective snow sports board (2) to be supported, in particular a central support area and two lateral support areas.

[0105] In a 38thaspect in accordance with the preceding aspect, the central longitudinal support relief (11) and each lateral support relief (12) of each structural module (6) of the supporting structure (5) project above the longitudinal grooves (10) to define a single upper support plane for the respective snow sports board (2) to be supported or supported, which lies at a higher level than the lying plane of the longitudinal grooves (10) in which the continuous looped traction strips (9) of the continuous looped traction belt (8) are slidable without coming into contact with the respective snow sports board (2) to be supported or supported.

[0106] In a 39thaspect in accordance with any one of the preceding aspects, the transmission device (14) comprises at least one drive roller (15) operatively connected to the motor (3) to rotate around its own axis of rotation when the motor (3) is activated, the continuous looped traction belt (8) being at least partially wound around and / or on the drive roller (15) so that when the drive roller (15) is operated in rotation upon activation of the motor (3), the continuous looped traction belt (8) is driven in movement along its longitudinal development.

[0107] In a 40thaspect in accordance with the preceding aspect, the at least one drive roller (15) has an outer cylindrical portion (16) configured to come into contact with the continuous looped traction belt (8) and to drive the latter in movement when the motor (3) is activated.

[0108] In a 41staspect in accordance with any one of the two preceding aspects when dependent on the 31staspect or any one of the preceding aspects when dependent on the 31staspect, the drive roller (15) of the transmission device (14) comprises two outer cylindrical portions (16) centrally separated from each other, each outer cylindrical portion (16) of the drive roller (15) being arranged to interact with a respective continuous looped traction strip (9) of the continuous looped traction belt (8) to drive said continuous looped traction strip (9) when the motor (3) is activated causing the rotation of the drive roller (15) around its own axis of rotation.

[0109] In a 42ndaspect in accordance with any one of the two preceding aspects, each outer cylindrical portion (16) of the drive roller (15) has a contact surface provided with a plurality of hooking protrusions (17) radially emerging from the contact surface, the hooking protrusions (17) being structurally configured to fit into corresponding hooking openings or seatspresent and distributed on the continuous looped traction belt (8), in particular on each continuous looped traction strip (9) of the continuous looped traction belt (8).

[0110] In a 43rdaspect in accordance with any one of the eleven preceding aspects, the transmission device (14) comprises at least one gear (19) operatively interposed between the motor (3) and the drive roller (15) of the continuous looped traction belt (8) or each outer cylindrical portion (16) thereof, for rotating said drive roller (15) upon activation of the motor (3). In a 44thaspect in accordance with any one of the two preceding aspects, the transmission device (14) comprises a plurality of gears (19) operatively interposed between the motor (3) and the drive roller (15) of the continuous looped traction belt (8), optionally between the motor (3) and each of the outer cylindrical portions (16) of the drive roller (15) of the continuous looped traction belt (8), for rotating the latter upon activation of the motor (3).

[0111] In a 45thaspect in accordance with the preceding aspect, the plurality of gears (19) operatively interposed between the motor (3) and the drive roller (15) or the respective outer cylindrical portions (16) thereof defines at least one planetary gear (19) train, in particular a planetary gear (19) train for each outer cylindrical portion (16) of the drive roller (15) provided. In a 46thaspect in accordance with the preceding aspect, the planetary gear (19) train defined by the plurality of gears (19) operatively interposed between the motor (3) and the drive roller (15) or the corresponding outer cylindrical portion (16) of the drive roller (15) comprises:

[0112] a sun gear (19a) operatively connected to a drive shaft (3b) of the motor (3), optionally the sun gear (19a) being keyed to a free end of the drive shaft (3b) of the motor (3), the sun gear (19a) rotating together with the drive shaft (3b) of the motor (3) when the latter is activated;

[0113] a plurality of satellite gears (19b), optionally four, operatively connected, in particular geared, to and around the sun gear (19a), the satellite gears (19b) rotating around their own axis of rotation and following a circular motion of revolution around the sun gear (19a);

[0114] at least one spur gear (19c) operatively connected, in particular geared, to the satellite gears (19b) on the opposite side to the sun gear (19a), the spur gear (19c) being stationary and internally housing the sun gear (19a) and the satellite gears (19b).

[0115] In a 47thaspect in accordance with the preceding aspect, the spur gear (19c) of each planetary gear (19) train is internally formed in a cylindrical sleeve (20) which can be fitted longitudinally onto the motor (3), in particular coaxially with respect thereto.

[0116] In a 48thaspect in accordance with the preceding aspect, the cylindrical sleeve (20) in which the spur gear (19c) is internally formed can be fixed onto the motor (3) by means of corresponding fastening elements.

[0117] In a 49thaspect in accordance with any one of the two preceding aspects, the cylindrical sleeve (20) fittable onto the motor (3) encloses, at least partially from the outside, the motor (3), in particular, the cylindrical sleeve (20) housing, at least in part within itself, the motor (3).

[0118] In a 50thaspect in accordance with any one of the four preceding aspects, the drive roller (15) or a respective outer cylindrical portion (16) of the drive roller (15) is engageable to at least one of the satellite gears (19b), in particular all the satellite gears (19b), of the corresponding planetary gear (19) train, such that the circular motion of revolution of the latter around the corresponding sun gear (19a) determines the rotation of the drive roller (15) or of the respective outer cylindricalportion (16) thereof, around its own axis of rotation, coinciding with the axis of rotation of the sun gear (19a) of the respective planetary gear (19) train and the axis of rotation of the respective drive shaft of the motor (3).

[0119] In a 51staspect in accordance with the preceding aspect, the drive roller (15) or the respective outer cylindrical portion (16) thereof is engageable to the satellite gears (19b) of the corresponding planetary gear (19) train at the respective axes of said satellite gears (19b), in particular by means of a respective engagement pin or a similar axial engagement element insertable in each satellite gear (19b) and engageable in a respective engagement seat or opening (16a) made through an end wall (16b) of the drive roller (15) or of the corresponding outer cylindrical portion (16) of said drive roller (15). In a 52ndaspect in accordance with the 47thaspect or any one of the two preceding aspects when dependent on the 47thaspect, the drive roller (15) or the respective outer cylindrical portion (16) thereof is longitudinally and rotationally fittable or fitted to a respective cylindrical sleeve (20) which is in turn fitted to the motor (3).

[0120] In a 53rdaspect in accordance with any one of the seven preceding aspects, the transmission device (14) comprises, for each cylindrical sleeve (20) fitted to the motor (3), at least one friction member (21) operatively associated with the respective planetary gear (19) train.

[0121] In a 54thaspect in accordance with the preceding aspect when dependent on the 47thaspect or on any preceding aspect dependent on the 47thaspect, the friction member (21) comprises at least one spiral or disc clutch operatively housed in an end seat (20a) of the respective cylindrical sleeve (20) fitted to the motor (3), the end seat (20a) of said cylindrical sleeve (20) being made in correspondence of the respective spur gear (19c) whereby the spiral or disc clutch of the respective friction member (21) is interposed between the respective planetary gear (19) train and an inner wall (20b) of the end seat (20a) of the respective cylindrical sleeve (20), the spiral or disc clutch of the corresponding friction member (21) interacting with the respective planetary gear (19) train during the activation of the motor (3) and the movement of the respective gears (19) of the planetary gear (19) train to ensure that the direction of movement is unique.

[0122] In a 55thaspect in accordance with the 52ndaspect or with any one of the two preceding aspects when dependent on the 52ndaspect, at least one sealing element (22), in particular an annular sealing element, more particularly an annular lip seal, is operatively interposed between the drive roller (15) or the respective outer cylindrical portion (16) thereof and the respective cylindrical sleeve (20) fitted to the motor (3) to prevent infiltration of moisture, water, dirt and / or any similar unwanted external body or element.

[0123] In a 55thbis aspect in accordance with any one of the aspects from the 1staspect to the 42ndaspect, the transmission device (14) comprises at least one transmission disc (32) operatively engaged to a respective drive shaft (3b) of the motor (3), in particular fitted and / or keyed to a respective drive shaft (3b) of the motor (3), and constrainable or constrained to the drive roller (15) to cause the latter to rotate about its axis of rotation when the motor (3) is activated.

[0124] In a 55thter aspect in accordance with the 42ndaspect or with the preceding aspect when dependent on the 42ndaspect, the transmission device (14) comprises, for each outer cylindrical portion (16) of the drive roller (15), at least one respective transmission disc (32) operatively engaged to the respective drive shaft (3b) of the motor (3), in particular fitted and / or keyed to the respective drive shaft (3b) of the motor (3), and constrainable or constrained to the respective outer cylindrical portion (16), in particular to an end wall (16b) of said outer cylindrical portion (16), of the drive roller (15), to cause the latter to rotate about its own axis of rotation when the motor (3) is activated.In a 56thaspect in accordance with the 14thaspect or any preceding aspect dependent on the 14thaspect, a first return roller (23) is operatively located at the first end (5a) of the supporting structure (5), the first return roller (23) developing substantially perpendicularly to the longitudinal development of the supporting structure (5) and substantially parallel to the drive roller (15), and the continuous looped traction belt (8) developing at least partially around the first return roller (23).

[0125] In a 57thaspect in accordance with the preceding aspect, the first return roller (23) is located near the drive roller (15) of the transmission device (14), the continuous looped traction belt (8) reversing its curvature from the drive roller (15) to the first return roller (23) and vice versa.

[0126] In a 58thaspect in accordance with any one of the two preceding aspects when the 56thaspect depends on the 35thaspect or any preceding aspect dependent on the 35thaspect, the first return roller (23) comprises two half-portions (23a) aligned along an axis substantially perpendicular to the longitudinal development of the supporting structure (5), each half-portion (23a) of the first return roller (23) being interposed between a respective longitudinal groove (10) of the structural modules (6) of the supporting structure (5) and the drive roller (15) in a position aligned with said groove (10), each continuous looped traction strip (9) of the continuous looped traction belt (8) developing at least partially around a respective halfportion (23a) of the first return roller (23).

[0127] In a 59thaspect in accordance with the 56thaspect or any one of the three preceding aspects when dependent on the 56thaspect, a second return roller (24) is operatively located at the second end (5b) of the supporting structure (5), the second return roller (24) developing substantially perpendicularly to the longitudinal development of the supporting structure (5) and substantially parallel to the drive roller (15) and to the first return roller (23), the continuous looped traction belt (8) developing at least partially around the second return roller (24).

[0128] In a 60thaspect in accordance with the preceding aspect when dependent on the preceding aspect, the second return roller (24) comprises two half-portions (24a) aligned along an axis substantially perpendicular to the longitudinal development of the supporting structure (5), each half-portion (24a) of the second return roller (24) being aligned with a respective groove (10) of the structural modules (6) of the supporting structure (5), each continuous looped traction strip (9) of the continuous looped traction belt (8) developing at least partially around a respective half-portion (24a) of the second return roller (24).

[0129] In a 61staspect in accordance with the 14thaspect or any one of the preceding aspects dependent on the 14thaspect, the engagement mechanism (25, 26, 27, 28, 33) of the driving device (1 ) comprises at least one constraining element (25, 26, 27) located at the first end (5a) of the supporting structure (5).

[0130] In a 62ndaspect in accordance with the preceding aspect, the constraining element (25, 26, 27) of the engagement mechanism (25, 26, 27, 28, 33) is located on the supporting structure (5) near the drive roller (15) of the transmission device (14) and the motor (3).

[0131] In a 63rdaspect in accordance with any one of the two preceding aspects, the constraining element (25, 26, 27) comprises at least one hook (25) for engaging and / or locking the tail portion (2a) of a respective snow sports board (2), optionally the hook (25) being located centrally with respect to the supporting structure (5) and / or with respect to the drive roller (15) of the transmission device (14).In 364thaspect in accordance with any one of the three preceding aspects, the constraining element (25, 26, 27) comprises two or more hooks (25, 26) for engaging and / or locking the tail portion (2a) of a respective snow sports board (2), optionally at least one of the hooks (25, 26) being located centrally with respect to the supporting structure (5) and / or with respect to the drive roller (15) of the transmission device (14), while at least one other auxiliary hook (26) being located at a side edge of said supporting structure (5).

[0132] In a 65thaspect in accordance with any one of the two preceding aspects, each hook (25, 26) is configured in such a way as to keep the respective snow sports board (2) elevated with respect to the continuous looped traction belt (8).

[0133] In a 66thaspect in accordance with any one of the five preceding aspects, the constraining element (25, 26, 27) of the engagement mechanism (25, 26, 27, 28, 33) comprises a pair of hooking strips (27), optionally flexible, defining with the supporting structure (5) itself respective engagement areas for the tail portion (2a) of a respective snow sports board (2). In a 67thaspect in accordance with the preceding aspect, each hooking strip (27) develops transversally with respect to the supporting structure (5), optionally obliquely with respect to the longitudinal development thereof, between a respective lateral edge of the supporting structure (5) and a central area thereof.

[0134] In a 68thaspect in accordance with the preceding aspect when the 66thaspect depends on any one of the aspects from the 64thaspect to the 65thaspect, each hooking strip (27) has a first end (27a) fixed to a lateral edge of the respective supporting structure (5) and a second end (27b) fixed to the central hook (25) of the constraining element, in particular to the top of the central hook (25) of the constraining element, whereby the hooking strips (27) converge towards said central hook (25).

[0135] In a 69thaspect in accordance with the 14thaspect or any one of the preceding aspects dependent on the 14thaspect, the engagement mechanism (25, 26, 27, 28, 33) of the driving device (1 ) comprises at least one hooking element (28) located at the second end (5b) of the supporting structure (5).

[0136] In a 70thaspect in accordance with the preceding aspect, the hooking element (28) is adjustable to allow the engagement of snow sports boards (2) of different lengths.

[0137] In a 71staspect in accordance with any one of the two preceding aspects, the hooking element (28) comprises at least one end (29) shaped substantially as an eyelet, configured to receive the insertion of the tip portion (2b) of a respective snow sports board (2).

[0138] In a 72ndaspect in accordance with the preceding aspect, the eyelet end (29) of the hooking element (28) is movable with respect to the second end (5b) of the supporting structure (5) to allow the engagement of snow sports boards (2) of different lengths.

[0139] In a 73rdaspect in accordance with any one of the two preceding aspects, the eyelet end (29) of the hooking element (28) comprises:

[0140] a first cross member (29a), in particular an upper cross member;

[0141] a second cross member (29b), in particular a lower cross member;

[0142] two side uprights (29c), in particular terminals, extending transversally between the first cross member (29a) and the second cross member (29b) to connect the latter,

[0143] the first cross member (29a), the second cross member (29b) and the two side uprights (29c) defining a space (30) for the insertion of the tip portion (2b) of a respective snow sports board (2) to be supported.In a 74thaspect in accordance with any one of the three preceding aspects, the eyelet end (29) of the hooking element (28) defines an insertion direction of the tip portion (2b) of a respective snow sports board (2) inclined with respect to the longitudinal development of the supporting structure (5).

[0144] In a 75thaspect in accordance with any one of the four preceding aspects, the eyelet end (29) of the hooking element (28) is supported by a supporting appendix (31) of elongated shape engageable at the second end (5b) of the supporting structure (5).

[0145] In a 76thaspect in accordance with the preceding aspect, the eyelet end (29) of the hooking element (28) is integral with the supporting appendix (31) on the opposite side to the supporting structure (5).

[0146] In a 77thaspect in accordance with any one of the two preceding aspects, the supporting appendix (31) has a substantially flattened shape.

[0147] In a 78thaspect in accordance with any one of the three preceding aspects, the supporting appendix (31) has:

[0148] a first portion (31a) engageable at the second end (5b) of the supporting structure (5), which develops substantially in a rectilinear direction;

[0149] a second portion (31b), integral with the eyelet end (29) of the hooking element (28), inclined with respect to the first portion (31a), in particular the second portion (31b) maintaining the eyelet end (29) of the hooking element (28) at a higher level with respect to the lying plane of the supporting structure (5);

[0150] a third portion (31c) interposed between the first portion (31a) and the second portion (31b) to connect the latter, in particular the third portion (31c) being arched or curved to connect the first portion (31a) and the second portion (31b).

[0151] In a 79thaspect in accordance with any one of the four preceding aspects, the supporting appendix (31) is adjustable in length to allow the engagement of snow sports boards (2) of different lengths.

[0152] In an 80thaspect in accordance with any one of the five preceding aspects, the engagement of the supporting appendix (31) at the second end (5b) of the supporting structure (5) is modifiable to vary the distance of the eyelet end (29) of the hooking element (28) with respect to the supporting structure (5) itself and allow the engagement of snow sports boards (2) of different lengths.

[0153] In an 81staspect in accordance with the 14thaspect or any one of the preceding aspects when dependent on the 14thaspect, the second end (5b) of the supporting structure (5) is provided with an end portion (18) rotatable with respect to the supporting structure (5) itself and having a lower surface (18a), arranged to be in contact, at least partially, with the snowy ground or the snow, and having a profile tapered upward in a direction away from the supporting structure (5) itself, in particular according to a curved or arched pattern.

[0154] In an 82ndaspect in accordance with any one of the preceding aspects, the driving device (1) is further provided with at least one electronic control unit operatively connected to the motor (3) to switch the latter between a deactivation state, in which the continuous looped traction belt (8) is not operated in movement, and an activation state, in which the continuous looped traction belt (8) is operated in movement along its longitudinal development in order to determine a displacement, in particular a forward movement, of the driving device (1) on the snow, together with the respective snow sports board (2) supported.In an 83rdaspect in accordance with the preceding aspect when dependent on the 14thaspect or on any preceding aspect dependent on the 14thaspect, the electronic control unit is housed within one of the structural modules (6) of the supporting structure (5), in particular in the structural module (6) of the supporting structure (5) closest to the motor (3), optionally in the structural module (6) of the supporting structure (5) corresponding to the tail portion (2a) of the respective snow sports board (2) when supported by the supporting structure (5).

[0155] In an 84thaspect in accordance with any one of the two preceding aspects when the 82ndaspect depends on the 14thaspect or on any preceding aspect dependent on the 14thaspect, the driving device (1) comprises one or more pressure sensors arranged on the supporting structure (5), in particular a plurality of pressure sensors distributed along the supporting structure (5), each pressure sensor being operatively connected to the electronic control unit to emit respective signals indicative of the movement being performed by the user, the signals emitted by each pressure sensor being received and processed by the electronic control unit to recognise the movement performed by the user.

[0156] In an 85thaspect in accordance with the preceding aspect, the electronic control unit is configured to process the signals received from each pressure sensor to determine the activation modes of the motor (3) and manage the movement of the continuous looped traction belt (8) as a function of the extent of the assistance to be provided to the user during their effort.

[0157] BRIEF DESCRIPTION OF THE DRAWINGS

[0158] The following is a detailed description, given by way of non-limiting example, of one or more preferred embodiments of the invention, in which:

[0159] Figure 1 is a side elevation view of a driving device for snow sports boards, in particular skis, snowboards, splitboards and / or the like, in accordance with the present invention;

[0160] Figure 2 is a plan view of the driving device of Figure 1 ;

[0161] Figure 3 is a perspective view of the driving device of Figures 1 and 2;

[0162] Figures 4 to 6 are enlargements of details respectively of Figures 1 to 3;

[0163] Figure 7 is an enlargement of a further detail of Figure 3;

[0164] Figure 8 reproduces the detail of Figure 7 with some components of the driving device removed for clarity, such as for example the continuous looped traction strips or the hooking element for the respective snow sports board to be supported, and another component disassembled and spaced apart from the rest of the driving device;

[0165] Figure 9 is a broken-away exploded perspective view of the driving device of Figures 1 to 8, represented in accordance with a first embodiment of a respective transmission device;

[0166] Figure 10 is a broken-away exploded perspective view of the driving device of Figures 1 to 8, represented in accordance with a second embodiment of the respective transmission device;

[0167] Figure 11 is a broken-away perspective view of the driving device of Figure 10, from which the drive roller of the continuous looped traction strips has been removed to allow a better visualisation of the provided transmission device;

[0168] Figure 12 is a perspective view of the driving device, according to the present invention, represented in a folded condition;Figure 13 is a cross section of a structural module of a supporting structure of the driving device, taken along the trace XIII-XIII of Figure 8;

[0169] Figure 14 is a perspective view of the driving device, in accordance with the present invention, represented in engagement with a respective snow sports board.

[0170] DETAILED DESCRIPTION

[0171] With reference to the appended figures, by the numeral 1, a driving device for snow sports boards 2 (an example of a board is illustrated in Figure 15) is generally indicated, in particular a ski, a snowboard, a splitboard or a similar board, in accordance with the present invention.

[0172] As visible in the appended figures, the driving device 1 comprises at least one motor 3 (visible only in Figures 9 and 10), in particular an electric motor, more particularly a brushless electric motor, positioned at an end of the driving device 1 which corresponds to a respective end, in particular to a tail portion 2a, of a snow sports board 2 when the latter is engaged to the driving device 1 (Figure 14).

[0173] The electric motor 3 is energetically powered by a respective power supply unit 4 comprising at least one battery 4a (schematically shown in the cross section of Figure 13), optionally a plurality of batteries 4a, preferably rechargeable, suitably electrically connected to each other.

[0174] Advantageously, each battery 4a of the power supply unit 4 of the electric motor 3 is a Lithium-ion battery, in particular a LINIMnCoO2 (NMC) battery, or a LiFePO4 (LFP) battery, or a LiPo (Lithium Polymer) battery, optionally with optimized chemistry to withstand cold and low temperatures to which the driving device 1 is subjected during use, preferably with integrated heating.

[0175] In order to protect the batteries 4a from cold, moisture and water and snow, each battery is housed in a thermal casing and / or made of an insulating material, such as for example neoprene or silicone or insulating foam.

[0176] As visible in the cross section of Figure 13, it is advantageous that the thermal casing of each battery 4a or of specific groups of batteries 4a comprises a first envelope 4c, in particular the innermost one, having at least one layer made of cross-linked polyolefin or of a composite material with reinforcing fibers, and a second envelope 4d, in particular the outermost one, made, on the upper side and / or lower side 4d', of an aluminum sheet, optionally alloyed with magnesium and silicon, and laterally 4d", of a polymer, optionally polyurethane or synthetic polyamide, such as for example nylon or UHMWPE / ABS.

[0177] Alternatively, the second envelope 4d is made, on the upper side and / or lower side 4d', of a composite material, in particular carbon fiber or an aramid synthetic fiber, such as for example kevlar. In this case, at least one structural module 6, in particular all structural modules 6, of the supporting structure 5, is / are provided, on each lower lateral edge, with a steel profile, in particular stainless steel, having a corresponding stabilization blade.

[0178] As visible in the appended figures, the power supply unit 4 of the electric motor 3 defines a supporting structure 5 which is developed along a predominant direction, in particular a longitudinal direction, and has a first end 5a and a second end 5b opposite to each other and each arranged to remain at or near a tail portion 2a or a tip portion 2b of a respective snow sports board 2 (Figure 14) when the driving device 1 is engaged thereto.Still with reference to the appended figures, the supporting structure 5 has a plurality of structural modules 6, aligned along the predominant direction of development and mutually connected to each other by means of a respective intermediate joining portion 7. Each intermediate joining portion 7 is interposed between two corresponding structural modules 6 and is flexible, in particular bendable, in order to allow a structural module 6 to be flipped and / or superimposed on the adjacent structural module 6 (Figure 12) when the driving device 1 is in a disengagement condition from the respective snow sports board 2 to assume a compact shape having a reduced overall size compared to the overall size of the driving device 1 when it is in an engagement condition with a snow sports board 2 or, in any case, in an unfolded condition. The flipping of each structural module 6 with respect to the adjacent structural module 6 allows the packing of the supporting structure 5 and, therefore of the driving device 1, when not in use, which allows easier transport, for example by placing it inside a backpack or a similar carrying bag.

[0179] Advantageously, still with reference to the cross section of Figure 13, each structural module 6 of the supporting structure 5 encloses within itself one or more batteries 4a electrically connected to each other by means of corresponding electrical connectors 4b suitably insulated with respect to the outside, so as to electrically connect all the batteries 4a provided. In accordance with a preferred embodiment, the electrical connectors 4a are further housed in correspondence of the intermediate joining portions 7 between the respective structural modules 6 of the supporting structure 5 and are flexible and / or bendable, in order to allow a structural module 6 to be flipped and / or superimposed on the adjacent structural module 6 (Figure 12).

[0180] As visible in the appended figures, each structural module 6 of the supporting structure 5 has a substantially flattened shape with at least one thinned end, in particular with both opposite ends thinned, optionally tapered in longitudinal section of the supporting structure 5. As a consequence, the supporting structure 5 also has a substantially flattened overall shape which has, at each intermediate joining portion 7, at least one respective structural concavity, optionally two structural concavities facing respectively opposite sides, i.e. upward and downward.

[0181] As visible in Figures 1 to 6, 12 and 14, the driving device 1 is provided with at least one continuous traction belt 8 running longitudinally in a closed loop around the supporting structure 5 from the first end 5a to the second end 5b thereof. In other words, the continuous looped traction belt 8 longitudinally wraps around the supporting structure 5 from the first end 5a to the second end 5b thereof.

[0182] In detail, the continuous looped traction belt 8 is divided into at least two continuous traction strips 9, substantially structurally identical, running longitudinally in a loop substantially parallel to each other, in particular parallel to the longitudinal development of the supporting structure 5 and longitudinally around the latter from its first end 5a to its second end 5b and vice versa. In other words, each continuous looped traction strip 9 longitudinally wraps around the supporting structure 5 engaging or involving the first end 5a and the second end 5b thereof.

[0183] In accordance with one of the provided embodiments, the continuous looped traction strips 9 are separate from each other, so as to be structurally independent, and are side-by-side along the supporting structure 5. In particular, the continuous looped traction strips 9 are laterally spaced so as to be each located near corresponding lateral edges of the structural modules 6 of the supporting structure 5 leaving free a respective central area which develops along the entire longitudinal development of the supporting structure 5 itself.The continuous looped traction strips 9 of the continuous looped traction belt 8 are made of the same material, optionally a synthetic material suitable for climbing on snow, in particular synthetic polyamide, such as for example nylon, or a textile fiber of animal origin, such as for example mohair, or a combination of nylon and mohair.

[0184] In order to allow the folding and packing of the supporting structure 5 during the disengagement condition of the driving device 1, as illustrated in Figure 12, the synthetic material with which the continuous looped traction strips 9 are made is flexible and / or bendable.

[0185] Each continuous looped traction strip 9 of the continuous looped traction belt 8 has a contact surface, facing outward and / or toward the snowy ground, provided with a multitude of hairs and / or bristles whose orientation with respect to the contact surface itself allows forward sliding of the driving device 1 and prevents backward sliding thereof, also during an inactive condition of the driving device 1, i.e. when the latter does not promote any forward movement on the snow. Each structural module 6 of the supporting structure 5 has an upper portion provided with two longitudinal grooves 10 (Figures 8 to 11 and 13) running substantially parallel along the longitudinal development of the supporting structure 5 itself. The longitudinal grooves 10 are adapted to receive, in sliding engagement, the continuous looped traction strips 9 of the continuous looped traction belt 8.

[0186] As visible in the appended figures and, in particular, in Figures 8 to 11 and 13, from which the continuous looped traction strips 9 have been removed, the longitudinal grooves 10 are laterally spaced and define between them a respective central longitudinal support relief 11 for the support of a respective snow sports board 2.

[0187] The upper portion of each structural module 6 of the supporting structure 5 further has two lateral support reliefs 12, each running longitudinally adjacent to a respective longitudinal groove 10 on the opposite side of the central longitudinal support relief 11, whereby the supporting structure 5 provides three support areas, in particular a central support area and two lateral support areas, for the respective snow sports board 2 to be supported.

[0188] As visible in the cross section of Figure 13, the central longitudinal support relief 11 and each lateral support relief 12 of each structural module 6 of the supporting structure 5 project above the longitudinal grooves 10 to define a single upper support plane for the respective snow sports board 2 to be supported, which, in the engagement condition, lies at a higher level than the lying plane of the longitudinal grooves 10 in which the continuous looped traction strips 9 of the continuous looped traction belt 8 are slidable without coming into contact with the respective snow sports board 2. Each structural module 6 of the supporting structure 5 has a lower portion on which the continuous looped traction strips 9 of the continuous looped traction belt 8 are inferiorly slidable, upon activation of the motor 3, to interact with the snow and advance the driving device 1 together with the respective snow sports board 2 supported. In detail, as visible in Figure 13, the lower portion of each structural module 6 of the supporting structure 5 is also provided with corresponding longitudinal grooves 10, intended to provide the lower branches of the continuous looped traction strips 9 with corresponding seats for the sliding thereof.

[0189] Advantageously, in order to ensure the optimal sliding of each continuous looped traction strip 9 along the respective longitudinal groove 10 of each of the structural modules 6 of the supporting structure 5, each continuous looped traction strip 9 is treated with at least one lubricating substance arranged to increase its slidability. Said lubricating substance comprises at least a substance based on silicones or fluoropolymers, optionally deposited by spraying in order to create at least a thin hydrophobic layer and reduce snow accumulation.Advantageously, the lower portion of at least one of the structural modules 6 of the supporting structure 5, in particular of all the structural modules 6 of the supporting structure 5, has corresponding lateral stabilization edges 13 (Figure 13) configured and / or shaped to come into contact with the snow in place of the corresponding blades of the respective snow sports board 2 supported. The lateral stabilization edges 13 of each of the structural modules 6 of the supporting structure 5 are made of a metallic material, optionally aluminum, more optionally alloyed with magnesium and silicon. In particular, the lateral stabilization edges 13 are obtained directly from the bending of the aluminum sheet that defines the lower part of the thermal casing of the batteries 4a enclosed in each structural module 6 of the supporting structure 5.

[0190] In order to kinematically connect the electric motor 3 and the continuous looped traction strips 9 of the continuous looped traction belt 8, the driving device 1 comprises at least one transmission device 14 operatively interposed between the electric motor 3 and the continuous looped traction strips 9 to transmit to the latter, upon activation of the electric motor 3, a forward movement along their longitudinal closed loop development. The forward movement of the continuous looped traction strips 9 is accomplished with the lower branch of each of them directed from the second end 5b of the supporting structure 5 to the first end 5a thereof and the upper branch directed from the first end 5a of the supporting structure 5 to the second end 5b.

[0191] In detail, the transmission device 14 comprises at least one drive roller 15 operatively connected to the electric motor 3 to rotate around its own axis of rotation when the electric motor 3 is activated. In order to drive in movement the two continuous looped traction strips 9, the drive roller 15 has two outer cylindrical portions 16 centrally separated from each other and longitudinally aligned with each other. Each outer cylindrical portion 16 of the drive roller 15 is arranged to interact with a respective continuous looped traction strip 9 to drive the same when the motor 3 is activated causing the rotation of the drive roller 15 around its own axis of rotation.

[0192] In detail, each continuous looped traction strip 9 of the continuous looped traction belt 8 is at least partially wound around the drive roller 15 and / or around a respective outer cylindrical portion 16 of the drive roller 15 so that when the latter is operated in rotation upon activation of the electric motor 3, the continuous looped traction strips 9 are driven in movement along their longitudinal development.

[0193] In accordance with the embodiments illustrated in Figures 9 and 10, each outer cylindrical portion 16 of the drive roller 15 has a contact surface provided with a plurality of hooking protrusions 17 radially emerging from the contact surface of each outer cylindrical portion 16. The hooking protrusions 17 are structurally configured to fit into corresponding hooking openings or seats present and distributed on each continuous looped traction strip 9 of the continuous looped traction belt 8, or at least on a respective engagement surface of each continuous looped traction strip 9 which faces on the opposite side with respect to the respective contact surface.

[0194] In accordance with a first embodiment of the transmission device 14 illustrated in Figures 10 and 11, the transmission device 14 comprises at least one gear 19 operatively interposed between the electric motor 3 and the drive roller 15 of the continuous looped traction strips 9 to cause the latter to rotate upon activation of the electric motor 3.

[0195] The transmission device 14 comprises a plurality of gears 19 operatively interposed between the electric motor 3 and each outer cylindrical portion 16 of the drive roller 15. In particular, each plurality of gears 19 defines a respective planetary gear train operatively interposed between the electric motor 3 and the corresponding outer cylindrical portion 16 of the drive roller 15. Each plurality of gears 19 comprises a sun gear 19a operatively connected to, in particular keyed to, a free endof a drive shaft 3b (Figure 10) of the electric motor 3 so that when the electric motor 3 is activated the sun gear 19a rotates around its own longitudinal axis of rotation. Each plurality of gears 19 also comprises a plurality of satellite gears 19b, optionally four, operatively connected, in particular geared, to and around the sun gear 19a. The satellite gears 19b rotate around their own axis of rotation and follow a circular motion of revolution around the sun gear 19a when the electric motor 3 is activated. Each plurality of gears 19 further comprises a spur gear 19c operatively connected, in particular geared, to the respective satellite gears 19b on the opposite side to the respective sun gear 19c. The spur gear 19c remains stationary and internally houses the respective sun gear 19a and the respective satellite gears 19b.

[0196] The spur gear 19c of each plurality of planetary gears 19 is internally formed in a respective cylindrical sleeve 20 which can be fitted longitudinally onto the electric motor 3, in particular coaxially with respect thereto. In detail, each cylindrical sleeve 20 can be fixed, by means of corresponding fastening elements, to a central collar 3a fitted onto the electric motor 3. The central collar 3a of the electric motor 3 contains the electrical connectors that connect the electric motor 3 to the batteries of the power supply unit 4.

[0197] Each cylindrical sleeve 20 fittable onto the electric motor 3 encloses, at least partially from the outside, the electric motor 3 whereby each cylindrical sleeve 20 houses, at least in part, the electric motor 3 within itself. The fastening of both cylindrical sleeves 20 to the central collar 3a of the electric motor 3 defines a single protective cylindrical containment casing of the electric motor 3.

[0198] As visible in Figure 12, each outer cylindrical portion 16 of the drive roller 15 is engageable to all the satellite gears 19b of the corresponding plurality of planetary gears 19, such that the circular motion of revolution of the latter around the corresponding sun gear 19a determines the rotation of the respective outer cylindrical portion 16 around its own axis of rotation, which coincides with the axis of rotation of the sun gear 19a of the respective plurality of planetary gears 19 and the axis of rotation of the respective drive shaft 3b of the electric motor 3.

[0199] Each outer cylindrical portion 16 of the drive roller 15 is connected to the satellite gears 19b of the corresponding plurality of planetary gears 19 at the respective axes of said satellite gears 19b. The connection between each outer cylindrical portion 16 of the drive roller 15 and the satellite gears 19b of the respective plurality of planetary gears 19 is determined by the presence of a respective engagement pin or a similar axial engagement element (not visible in the appended figures) insertable in each satellite gear and engageable in a corresponding engagement seat or opening 16a made through an end wall 16b of the corresponding outer cylindrical portion 16 of the drive roller 15.

[0200] As clearly visible in Figure 10, each outer cylindrical portion 16 of the drive roller 15 is longitudinally and rotationally fittable to a respective cylindrical sleeve 20 fitted to the electric motor 3.

[0201] Still with reference to Figure 10, the transmission device 14 comprises, for each cylindrical sleeve 20 fitted to the electric motor 3, at least one friction member 21 operatively associated with the respective plurality of planetary gears 19. In detail, each friction member 21 comprises at least one spiral or disc clutch operatively housed in an end seat 20a of the respective cylindrical sleeve 20 fitted to the electric motor 3. The end seat 20a of each cylindrical sleeve 20 is made in correspondence of the respective spur gear 19c whereby the spiral or disc clutch of the respective friction member 21 is interposed between the respective plurality of planetary gears 19 and an inner wall 20b of the end seat 20a of the respective cylindrical sleeveThe spiral or disc clutch of the corresponding friction member 21 interacts with the respective plurality of planetary gears 19 during the activation of the electric motor 3 and the movement of said gears 19 to ensure that the direction of movement is unique.

[0202] As visible in Figure 10, at least one annular sealing element 22, more particularly an annular lip seal, is operatively interposed between the respective outer cylindrical portion 16 of the drive roller 15 and the respective cylindrical sleeve 20 fitted to the electric motor 3 to prevent infiltration of moisture, water, dirt and / or any similar unwanted external body or element.

[0203] In accordance with a second embodiment of the transmission device 14 illustrated in Figure 9, the transmission device 14 comprises, for each outer cylindrical portion 16 of the drive roller 15, at least one respective transmission disc 32 operatively engaged to a respective drive shaft 3b of the electric motor 3, in particular fitted and / or keyed to the respective drive shaft 3b of the electric motor 3, and constrainable or constrained to an end wall 16b of the respective outer cylindrical portion 16 of the drive roller 15 to cause the latter to rotate about its own axis of rotation when the electric motor 3 is activated. In particular, each transmission disc 32 is constrained to the end wall 16b of the corresponding outer cylindrical portion 16 by means of corresponding fasteners, optionally elongated, in particular threaded, engageable in corresponding engagement seats or openings 16a made through the end wall 16b of the corresponding outer cylindrical portion 16 of the drive roller 15.

[0204] Also in this case, for each outer cylindrical portion 16 of the transmission device 14, a respective cylindrical sleeve 20 is provided, which can be fitted longitudinally and coaxially thereto, in particular fixable, by means of corresponding fastening elements, to the central collar 3a which is fitted onto the electric motor 3. Each cylindrical sleeve 20 encloses from the outside the electric motor 3 housing the latter within itself. Also in this case, the fastening of both cylindrical sleeves 20 to the central collar 3a of the electric motor 3 defines a single protective cylindrical containment casing of the electric motor 3.

[0205] As clearly visible in Figure 9, each outer cylindrical portion 16 of the drive roller 15 is longitudinally and rotationally fittable to a respective cylindrical sleeve 20 which is in turn fitted to the electric motor 3.

[0206] Still with reference to Figure 9, the transmission device 14 comprises, for each cylindrical sleeve 20 fitted to the electric motor 3, at least one friction member 21 operatively associated with the respective transmission disc 32. The friction member 21 interacts with the respective transmission disc 32 during the activation of the electric motor 3 to ensure that the direction of movement is unique.

[0207] As visible in Figure 9, at least one annular sealing element 22, more particularly an annular lip seal, is operatively interposed between the respective outer cylindrical portion 16 of the drive roller 15 and the respective cylindrical sleeve 20 fitted to the electric motor 3 to prevent infiltration of moisture, water, dirt and / or any similar unwanted external body or element.

[0208] In order to allow optimal sliding of the continuous looped traction strips 9 of the continuous looped traction belt 8 around the supporting structure 5 defined by the power supply unit 4 of the electric motor 3, the driving device 1 comprises a first return roller 23 operatively located at the first end 5a of the supporting structure 5 and a second return roller 24 operatively located at the second end 5b of the supporting structure 5.The first return roller 23 develops substantially perpendicularly to the longitudinal development of the supporting structure 5 and substantially parallel to the drive roller 15 with respect to which it is located in proximity.

[0209] In detail, the first return roller 23 comprises two half-portions 23a aligned along an axis substantially perpendicular to the longitudinal development of the supporting structure 5. Each half-portion 23a of the first return roller 23 is interposed between a respective longitudinal groove 10 of the structural modules 6 of the supporting structure 5 and the drive roller 15 in a position aligned with said longitudinal groove 10. Each continuous looped traction strip 9 develops at least partially around the respective half-portion 23a of the first return roller 23, reversing its curvature from the drive roller 15 to the first return roller 23 and vice versa.

[0210] The second return roller 24 develops substantially perpendicularly to the longitudinal development of the supporting structure 5 and substantially parallel to the drive roller 15 and to the first return roller 23. The second return roller 24 comprises two half-portions 24a aligned along an axis substantially perpendicular to the longitudinal development of the supporting structure 5. Each half-portion 24a of the second return roller 24 is aligned with a respective groove 10 of the structural modules 6 of the supporting structure 5. Each continuous looped traction strip 9 of the continuous looped traction belt 8 develops at least partially around a respective half-portion 24a of the second return roller 24.

[0211] Advantageously, the driving device 1 comprises at least one engagement mechanism 25, 26, 27, 28, 33 for the releasable engagement of the driving device 1 with a respective snow sports board 2. The engagement mechanism 25, 26, 27, 28, 33is structurally configured to guarantee: an engagement condition, wherein the driving device 1 is constrained to the respective snow sports board 2 in such a way that it remains under the snow sports board 2 with a lower branch of the continuous looped traction strips 9 facing away from the snow sports board 2, i.e. towards the snowy ground, whereby the activation of the electric motor 3 causes a longitudinal forward movement of the continuous looped traction strips 9 which produces a transfer of the driving device 1 on the snow, together with the respective sports board 2; a disengagement condition, wherein the driving device 1 is disengaged and / or separated from the snow sports board 2.

[0212] As visible in Figure 12, in the disengagement condition, the driving device 1 is foldable along a series of folding directions transverse to the supporting structure 5 to assume a compact shape having a reduced overall size compared to the overall size of the driving device 1 when it is in the engagement condition or, in any case, in an unfolded condition.

[0213] The engagement mechanism 25, 26, 27, 28, 33 of the driving device 1 comprises at least one constraining element 25, 26, 27 located at the first end 5a of the supporting structure 5, on the supporting structure 5 itself. The constraining element 25, 26, 27 comprises at least one hook 25 for engaging and / or locking the tail portion 2a of a respective snow sports board 2. The hook 25 is located centrally with respect to the supporting structure 5 at the central collar 3a of the electric motor 3 between the half-portions 23a of the first return roller 23.

[0214] The constraining element 25, 26, 27 further comprises at least one auxiliary hook 26, optionally two auxiliary hooks 26, for engaging and / or locking the tail portion 2a of a respective snow sports board 2. The auxiliary hook 26 is located at a side edge of the supporting structure 5 and is configured to keep the respective snow sports board 2 elevated with respect to the continuous looped traction strips 9.

[0215] The constraining element 25, 26, 27 also comprises a pair of hooking strips 27, optionally flexible, defining with the supporting structure 5 respective engagement areas for the tail portion 2a of a respective snow sports board 2. Each hooking strip 27 develops transversally with respect to the supporting structure 5, optionally obliquely with respect to thelongitudinal development thereof, between a respective lateral edge of the supporting structure 5 and a central area thereof. Each hooking strip 27 has a first end 27a fixed to a lateral edge of the respective supporting structure 5 and a second end 27b fixed to the top of the central hook 25 of the constraining element, whereby the hooking strips 27 converge towards said central hook 25.

[0216] The engagement mechanism 25, 26, 27, 28, 33 of the driving device 1 further comprises at least one hooking element 28 located at the second end 5b of the supporting structure 5. Advantageously, the hooking element 28 is adjustable to allow the engagement of snow sports boards 2 of different lengths.

[0217] In detail, the hooking element 28 comprises at least one end 29 shaped substantially as an eyelet configured to receive the insertion of the tip portion 2b of a respective snow sports board 2. The eyelet end 29 of the hooking element 28 defines an insertion direction of the tip portion 2b of a respective snow sports board 2 inclined with respect to the longitudinal development of the supporting structure 5 and is movable with respect to the second end 5b of the supporting structure 5 to allow the adjustment of the hooking element 28 and the engagement of snow sports boards 2 of different lengths. In particular, the eyelet end 29 of the hooking element 28 comprises a first cross member 29a, in particular an upper cross member, a second cross member 29b, in particular a lower cross member, and two side uprights 29c, in particular terminals, extending transversally between the first cross member 29a and the second cross member 29b to connect the latter. The first cross member 29a, the second cross member 29b and the two side uprights 29c define a space 30 for the insertion of the tip portion 2b of a respective snow sports board 2 to be supported.

[0218] The eyelet end 29 of the hooking element 28 is supported by a supporting appendix 31 of elongated and substantially flattened shape engageable at the second end 5b of the supporting structure 5. In particular, the eyelet end 29 of the hooking element 28 is integral with the supporting appendix 31 on the opposite side to the supporting structure 5.

[0219] The supporting appendix 31 has a first portion 31a developing in a substantially rectilinear direction engageable at the second end 5b of the supporting structure 5, a second portion 31b, integral with the eyelet end 29 of the hooking element 28, inclined with respect to the first portion 31a so as to maintain the eyelet end 29 at a higher level with respect to the lying plane of the supporting structure 5, and a third portion 31c, arched or curved, interposed between the first portion 31a and the second portion 31b to connect the latter.

[0220] Advantageously, the supporting appendix 31 is adjustable in length so as to make the hooking element 28 adjustable accordingly. In fact, the engagement of the supporting appendix 31 at the second end 5b of the supporting structure 5 is modifiable to vary the distance of the eyelet end 29 of the hooking element 26 with respect to the supporting structure 5 allowing the engagement of snow sports boards 2 of different lengths.

[0221] The engagement mechanism 25, 26, 27, 28, 33 further comprises one or more transverse engagement bands 33 which transversally wrap around the respective snow sports board 2 to keep it adhered to and joined with the supporting structure 5. Each transverse engagement band 33 defines a corresponding engagement eyelet for the respective snow sports board 2 to be retained and supported. The snow sports board 2 is inserted into the respective engagement eyelet defined by the respective transverse engagement band 33 which keeps it adhered against the supporting structure 5. In order to ensure optimal adhesion of the snow sports board 2 to the supporting structure 5, each engagement band 33 is elastic or elastically deformable. Alternatively, it is possible to provide respective retaining belts or straps, developing transversally to the longitudinal development of the supporting structure 5 from one lateral edge to the other thereof.The second end 5b of the supporting structure 5 is provided with an end portion 18 rotatable with respect to the supporting structure 5 itself and supporting the second return roller 24. The end portion 18 of the supporting structure 5 has a lower surface 18a, arranged to be in contact, at least partially, with the snowy ground or the snow, having a profile tapered upward in a direction away from the supporting structure 5 itself, in particular according to a curved or arched pattern. The end portion 18 further has on its upper side an engagement hook 18b by means of which it is possible to adjust the distance of the hooking element 28 as a function of the length of the snow sports board 2 to be supported. The engagement hook 18b is in fact configured to engage at least one through opening 31 d of a series of through openings 31 d made through the first portion 31a of the supporting appendix 31 which supports the eyelet end 29.

[0222] The driving device 1 is further provided with an electronic control unit (not visible in the appended figures) operatively connected to the electric motor 3 to switch the latter between a deactivation state, in which the continuous looped traction strips 9 of the continuous looped traction belt 8 are not operated in movement, and an activation state, in which the continuous looped traction strips 9 are operated in movement along their longitudinal development in order to determine a displacement, in particular a forward movement, of the driving device 1 on the snow, together with the respective snow sports board 2 supported.

[0223] Preferably, the electronic control unit is housed within one of the structural modules 6 of the supporting structure 5, in particular in the structural module 6 closest to the electric motor 3, i.e. the structural module 6 of the supporting structure 5 corresponding to the tail portion 2a of the respective snow sports board 2 when it is engaged to the supporting structure 5 by means of the engagement mechanism 25, 26, 27, 28, 33.

[0224] Furthermore, the driving device 1 comprises one or more pressure sensors (not visible in the appended figures), in particular a plurality of pressure sensors, arranged and distributed on the supporting structure 5. Each pressure sensor is operatively connected to the electronic control unit to emit respective signals indicative of the movement being performed by the user. The signals emitted by each pressure sensor are received and processed by the electronic control unit to recognize the movement performed by the user. The electronic control unit is configured to process the signals received from each pressure sensor to determine the activation modes of the electric motor 3 and manage the movement of the continuous looped traction strips 9 as a function of the extent of the assistance to be provided to the user during their effort.

Claims

CLAIMS1. Driving device (1) for snow sports boards (2), in particular skis, snowboards, splitboards and / or the like, comprising:at least one electric motor (3);at least one continuous traction belt (8) running longitudinally in a closed loop;at least one power supply unit (4) of the electric motor (3) comprising a plurality of rechargeable batteries (4a), the power supply unit (4) defining a supporting structure (5) which is developed along a predominant direction, in particular a longitudinal direction, and having a first end (5a) and a second end (5b) opposite to each other and each arranged to remain at or near a respective tail portion (2a) or tip portion (2b) of a respective snow sports board (2) when the driving device (1) is engaged thereon, the continuous looped traction belt (8) running longitudinally around the supporting structure (5) defined by the power supply unit (4) of the electric motor (3) from the first end (5a) to the second end (5b) thereof, in particular the continuous looped traction belt (8) longitudinally wrapping around the supporting structure (5) defined by the power supply unit (4) of the electric motor (3) from the first end (5a) to the second end (5b) thereof;at least one transmission device (14) operatively interposed between the electric motor (3) and the continuous looped traction belt (8) to transmit to the latter, upon activation of the motor (3), a forward movement along its longitudinal closed loop development and around the supporting structure (5) of the power supply unit (4) of the electric motor (3); at least one engagement mechanism (25, 26, 27, 28, 33) for the releasable engagement of the driving device (1) with a snow sports board (2), the engagement mechanism (25, 26, 27, 28, 33) being structurally configured in such a way as to guarantee the following conditions:o engagement condition, wherein the driving device (1) is constrained to the snow sports board (2) in such a way that it remains under the snow sports board (2) with a first branch of the continuous looped traction belt (8), in particular a lower branch, facing away from the snow sports board (2), i.e. towards the ground, whereby the activation of the electric motor (3) causes a longitudinal forward movement of the continuous looped traction belt (8) which produces a transfer of the driving device (1) on the snow, together with said sports board (2);o disengagement condition, wherein the driving device (1) is disengaged and / or separated from the snow sports board (2), in the disengagement condition the driving device (1) is foldable along at least one folding direction to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, otherwise, in an unfolded condition.

2. Driving device according to claim 1, wherein the continuous looped traction belt (8) is divided into at least two continuous traction strips (9) running longitudinally in a loop, substantially parallel to each other, optionally the continuous looped traction strips (9) being made of the same material and being structurally identical, in particular, the continuous looped traction strips (9) of the continuous looped traction belt (8) running longitudinally around the supporting structure (5) from the first end (5a) to the second end (5b) of the supporting structure (5), optionally the continuous looped traction strips (9) of the continuous looped traction belt (8) longitudinally wrapping around the supporting structure (5) from the first end (5a) to the second end (5b) thereof.

3. Driving device according to claim 2, wherein the supporting structure (5) has a plurality of structural modules (6), aligned along the predominant direction of development and mutually connected to each other by means of a respective intermediate joining portion (7), the intermediate joining portion (7) interposed between two corresponding adjacent structural modules (6) of the supporting structure (5) being flexible, in particular bendable, in order to allow a structural module (6) to be flipped and / or superimposed on the adjacent structural module (6), in particular when the driving device (1) is in the disengagement condition to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, in any case, in an unfolded condition.

4. Driving device according to claim 3, wherein each structural module (6) of the supporting structure (5) of the power supply unit (4) of the electric motor (3) comprises, optionally encloses within itself, one or more batteries (4a) electrically connected to each other, the structural modules (6) of the supporting structure (5) being electrically connected to each other, by means of respective electrical connectors which are insulated with respect to the outside, so as to electrically connect the respective batteries (4a) therein, the electrical connectors being housed in correspondence of the intermediate joining portions (7) between the respective structural modules (6) of the supporting structure (5), the electrical connectors being flexible, in particular bendable, to allow one structural module (6) to be flipped over and / or superimposed on the adjacent structural module (6), in particular when the driving device (1) is in the disengagement condition to assume a compact shape having a reduced overall size compared to the overall size of the driving device (1) when it is in the engagement condition or, in any case, in an unfolded condition, ensuring the electrical connection between the structural modules (6).

5. Driving device according to claim 3 or 4, wherein each structural module (6) has an upper portion provided with: two longitudinal grooves (10) running substantially parallel along the longitudinal development of the supporting structure (5) itself, the longitudinal grooves (10) being laterally spaced and defining between them a respective central longitudinal support relief (11) for the support of a respective snow sports board (2);two lateral support reliefs (12) each running longitudinally adjacent to a respective longitudinal groove (10) on the opposite side of the central longitudinal support relief (11), the supporting structure (5) providing three support areas for the respective snow sports board (2) to be supported, in particular a central support area and two lateral support areas, optionally, the central longitudinal support relief (11) and the lateral support reliefs (12) of each structural module (6) projecting above the longitudinal grooves (10) to define an upper support plane for the respective snow sports board (2) to be supported, which lies at a higher level than the lying plane of the longitudinal grooves (10) in which the continuous looped traction strips (9) are slidable without coming into contact with the respective snow sports board (2).

6. Driving device according to any one of claims 2 to 4, wherein the transmission device (14) comprises at least one drive roller (15) provided with two outer cylindrical portions (16) centrally separated from each other and operatively connected to the electric motor (3) to rotate around its own axis of rotation when the electric motor (3) is activated, each continuous looped traction strip (9) of the continuous looped traction belt (8) being at least partially wound around and / or on a respective outer cylindrical portion (16) of the drive roller (15) so that when the drive roller (15) is operated in rotation uponactivation of the electric motor (3), the continuous looped traction strips (9) are driven in movement along their longitudinal development by the respective outer cylindrical portions (16) of the drive roller (15), in particular each outer cylindrical portion (16) of the drive roller (15) having a contact surface provided with a plurality of hooking protrusions (17) radially emerging from the contact surface and structurally configured to fit into corresponding hooking openings or seats present and distributed on each continuous looped traction strip (9) of the continuous looped traction belt (8).

7. Driving device according to claim 6, wherein the transmission device (14) comprises a plurality of planetary gears (19) operatively interposed between the electric motor (3) and each outer cylindrical portion (16) of the drive roller (15) of the continuous looped traction strips (9) of the continuous looped traction belt (8), for rotating the outer cylindrical portions (16), upon activation of the electric motor (3), in particular each plurality of planetary gears (19) comprising:a sun gear (19a) operatively connected to a drive shaft (3b) of the electric motor (3), optionally the sun gear (19a) being keyed to a free end of the drive shaft (3b) of the electric motor (3), the sun gear (19a) rotating together with the drive shaft (3b) of the electric motor (3) when the latter is activated;a plurality of satellite gears (19b), optionally four, operatively connected, in particular geared, to and around the sun gear (19a), the satellite gears (19b) rotating around their own axis of rotation and following a circular motion of revolution around the sun gear (19a);at least one spur gear (19c) operatively connected, in particular geared, to the satellite gears (19b) on the opposite side to the sun gear (19a), the spur gear (19c) being stationary and internally housing the sun gear (19a) and the satellite gears (19b), optionally the spur gear (19c) of each of the plurality of planetary gears (19) being internally formed in a cylindrical sleeve (20) which can be fitted and / or fixed longitudinally to the motor (3).

8. Driving device according to claim 7, each outer cylindrical portion (16) of the drive roller (15) is engageable to the satellite gears (19b) of the corresponding plurality of planetary gears (19), such that the circular motion of revolution of the latter around the corresponding sun gear (19a) determines the rotation of the respective outer cylindrical portion (16), around its own axis of rotation, coinciding with the axis of rotation of the sun gear (19a) of the respective plurality of planetary gears (19) and the axis of rotation of the respective drive shaft (3b) of the motor (3), optionally each outer cylindrical portion (16) of the drive roller (15) being engageable to the satellite gears (19b) of the corresponding plurality of planetary gears (19) at the respective axes of said satellite gears (19b), in particular by means of respective engagement pins or similar axial engagement elements each insertable in the respective satellite gear (19b) and each engageable in a respective engagement seat or opening (16a) made through an end wall (16b) of the corresponding outer cylindrical portion (16) of the drive roller (15).

9. Driving device according to claim 6, wherein the transmission device (14) comprises, for each outer cylindrical portion (16) of the drive roller (15), at least one transmission disc (32) operatively engaged to a respective drive shaft (3b) of the electric motor (3), in particular fitted and / or keyed to the respective drive shaft (3b) of the electric motor (3), and constrainable or constrained to the corresponding outer cylindrical portion (16) to cause the latter and the drive roller (15) to rotate about its axis of rotation when the electric motor (3) is activated, optionally each transmission disc (32) of thetransmission device (14) being constrainable or constrained to an end wall (16b) of the respective outer cylindrical portion (16) of the drive roller (15), by engaging one or more fasteners in one or more engagement seats or openings (16a) made through the end wall (16b) of the respective outer cylindrical portion (16), to cause the latter to rotate about its axis of rotation when the electric motor (3) is activated.

10. Driving device according to any one of claims ? to 9, wherein each outer cylindrical portion (16) of the drive roller (15) is longitudinally and rotationally fittable or fitted to a respective cylindrical sleeve (20) which is in turn fitted to the electric motor (3), at least one sealing element (22), in particular an annular sealing element, more particularly an annular lip seal, being operatively interposed between each outer cylindrical portion (16) of the drive roller (15) and the respective cylindrical sleeve (20) fitted to the electric motor (3) to prevent infiltration of moisture, water, dirt and / or any similar unwanted external body or element.

11. Driving device according to any one of claims 6 to 10, wherein the engagement mechanism (25, 26, 27, 28, 33) of the driving device (1) comprises:at least one constraining element (25, 26, 27) located at the first end (5a) of the supporting structure (5) near the drive roller (15) of the transmission device (14) and the electric motor (3);at least one hooking element (28) located at the second end (5b) of the supporting structure (5), the hooking element (28) being adjustable to allow the engagement of snow sports boards (2) of different lengths.

12. Driving device according to claim 11, wherein the constraining element (25, 26, 27) comprises:at least one hook (25) for engaging and / or locking the tail portion (2a) of a respective snow sports board (2), optionally the hook (25) being located centrally with respect to the supporting structure (5) and / or with respect to the drive roller (15) of the transmission device (14);one or more auxiliary hook(s) (26) for engaging and / or locking the tail portion (2a) of a respective snow sports board (2), at least one auxiliary hook (26) being located at a side edge of said supporting structure (5), each of the hooks (25, 26) being configured in such a way as to keep the respective snow sports board (2) elevated with respect to the continuous looped traction strips (9),optionally, the constraining element (25, 26, 27) further comprising a pair of, in particular flexible, hooking strips (27) defining with the supporting structure (5) itself respective engagement areas for the tail portion (2a) of a respective snow sports board (2), each hooking strip (27) developing transversally with respect to the supporting structure (5), optionally obliquely with respect to the longitudinal development thereof between a respective lateral edge of the supporting structure (5) and a central area thereof, in particular each hooking strip (27) having a first end (27a) fixed to a lateral edge of the respective supporting structure (5) and a second end (27b) fixed to the central hook (25) of the constraining element, in particular to the top of the central hook (25) of the constraining element (25, 26, 27) for which the hooking strips (27) converge towards said central hook (25).

13. Driving device according to claim 11 or 12, wherein the hooking element (28) comprises at least one end (29) shaped substantially as an eyelet, configured to receive the insertion of the tip portion (2b) of a respective snow sports board (2) according to an insertion direction inclined with respect to the longitudinal development of the supporting structure (5), the eyelet end (29) of the hooking element (28) being movable with respect to the second end (5b) of the supporting structure (5) to allow the engagement of snow sports boards (2) of different lengths, in particular the eyelet end (29) of the hooking element (28) comprising: a first cross member (29a), in particular an upper cross member; a second cross member (29b), in particular a lower cross member; and, two side uprights (29c), in particular terminals, extending transversally between the first cross member (29a) and the second cross member (29b) to connect the latter, the first cross member (29a), the second cross member (29b) and the two side uprights (29c) defining a space (30) for insertion of the tip portion (2b) of a respective snow sports board (2) to be supported, optionally, the eyelet end (29) of the hooking element (28) being supported by, in particular integral with, a supporting appendix (31) of elongated and, optionally flattened shape, engageable at the second end (5b) of the supporting structure (5), in particular the supporting appendix (31) having: a first portion (31a) that can be engaged at the second end (5b) of the supporting structure (5), which develops substantially in a rectilinear direction;a second portion (31b), integral with the eyelet end (29) of the hooking element (28), inclined with respect to the first portion (31a), in particular the second portion (31b) maintaining the eyelet end (29) of the hooking element (28) at a higher level with respect to the lying plane of the supporting structure (5);a third portion (31c) interposed between the first portion (31a) and the second portion (31b) to connect the latter, the third portion (31c) being arched or curved to connect the first portion (31a) and the second portion (31b), optionally, the supporting appendix (31) being adjustable in length to allow the engagement of snow sports boards (2) of different lengths, in particular, the engagement of the supporting appendix (31) at the second end (5b) of the supporting structure (5) being adjustable to vary the distance of the eyelet end (29) of the hooking element (28) with respect to the supporting structure (5) itself and allow the engagement of snow sports boards (2) of different lengths.

14. Use of a driving device (1) on a snow sports board (2), in particular a ski, a snowboard, a splitboard and / or the like, for assisting the forward movement and displacement of a user on snow, wherein the driving device (1) comprises the driving device (1) according to any one of claims 1 to 13.

15. Sports equipment for snow sports activities, in particular ski mountaineering, comprising at least one snow sports board (2), optionally a ski, a snowboard, a splitboard or a similar sports board, having a tail portion (2a), a tip portion (2b) opposite to each other and a central portion (2c) interposed between the tail portion (2a) and the tip portion (2b), wherein the sports equipment comprises at least one driving device (1) according to any one of claims 1 to 13.

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